--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * net/core/devlink.c - Network physical/parent device Netlink interface
+ *
+ * Heavily inspired by net/wireless/
+ * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/gfp.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/refcount.h>
+#include <linux/workqueue.h>
+#include <linux/u64_stats_sync.h>
+#include <linux/timekeeping.h>
+#include <rdma/ib_verbs.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <net/rtnetlink.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
+#include <net/devlink.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/devlink.h>
+
+#include "devl_internal.h"
+
+struct devlink_linecard {
+ struct list_head list;
+ struct devlink *devlink;
+ unsigned int index;
+ const struct devlink_linecard_ops *ops;
+ void *priv;
+ enum devlink_linecard_state state;
+ struct mutex state_lock; /* Protects state */
+ const char *type;
+ struct devlink_linecard_type *types;
+ unsigned int types_count;
+ struct devlink *nested_devlink;
+};
+
+/**
+ * struct devlink_resource - devlink resource
+ * @name: name of the resource
+ * @id: id, per devlink instance
+ * @size: size of the resource
+ * @size_new: updated size of the resource, reload is needed
+ * @size_valid: valid in case the total size of the resource is valid
+ * including its children
+ * @parent: parent resource
+ * @size_params: size parameters
+ * @list: parent list
+ * @resource_list: list of child resources
+ * @occ_get: occupancy getter callback
+ * @occ_get_priv: occupancy getter callback priv
+ */
+struct devlink_resource {
+ const char *name;
+ u64 id;
+ u64 size;
+ u64 size_new;
+ bool size_valid;
+ struct devlink_resource *parent;
+ struct devlink_resource_size_params size_params;
+ struct list_head list;
+ struct list_head resource_list;
+ devlink_resource_occ_get_t *occ_get;
+ void *occ_get_priv;
+};
+
+static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
+ {
+ .name = "destination mac",
+ .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
+ .bitwidth = 48,
+ },
+};
+
+struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
+ .name = "ethernet",
+ .id = DEVLINK_DPIPE_HEADER_ETHERNET,
+ .fields = devlink_dpipe_fields_ethernet,
+ .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
+ .global = true,
+};
+EXPORT_SYMBOL_GPL(devlink_dpipe_header_ethernet);
+
+static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
+ {
+ .name = "destination ip",
+ .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
+ .bitwidth = 32,
+ },
+};
+
+struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
+ .name = "ipv4",
+ .id = DEVLINK_DPIPE_HEADER_IPV4,
+ .fields = devlink_dpipe_fields_ipv4,
+ .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
+ .global = true,
+};
+EXPORT_SYMBOL_GPL(devlink_dpipe_header_ipv4);
+
+static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
+ {
+ .name = "destination ip",
+ .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
+ .bitwidth = 128,
+ },
+};
+
+struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
+ .name = "ipv6",
+ .id = DEVLINK_DPIPE_HEADER_IPV6,
+ .fields = devlink_dpipe_fields_ipv6,
+ .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
+ .global = true,
+};
+EXPORT_SYMBOL_GPL(devlink_dpipe_header_ipv6);
+
+EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
+EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
+EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_trap_report);
+
+#define DEVLINK_PORT_FN_CAPS_VALID_MASK \
+ (_BITUL(__DEVLINK_PORT_FN_ATTR_CAPS_MAX) - 1)
+
+static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
+ [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
+ [DEVLINK_PORT_FN_ATTR_STATE] =
+ NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FN_STATE_INACTIVE,
+ DEVLINK_PORT_FN_STATE_ACTIVE),
+ [DEVLINK_PORT_FN_ATTR_CAPS] =
+ NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK),
+};
+
+#define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port) \
+ WARN_ON_ONCE(!(devlink_port)->registered)
+#define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port) \
+ WARN_ON_ONCE((devlink_port)->registered)
+#define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port) \
+ WARN_ON_ONCE(!(devlink_port)->initialized)
+
+static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
+ unsigned int port_index)
+{
+ return xa_load(&devlink->ports, port_index);
+}
+
+static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
+ struct nlattr **attrs)
+{
+ if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
+ u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
+ struct devlink_port *devlink_port;
+
+ devlink_port = devlink_port_get_by_index(devlink, port_index);
+ if (!devlink_port)
+ return ERR_PTR(-ENODEV);
+ return devlink_port;
+ }
+ return ERR_PTR(-EINVAL);
+}
+
+struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
+ struct genl_info *info)
+{
+ return devlink_port_get_from_attrs(devlink, info->attrs);
+}
+
+static inline bool
+devlink_rate_is_leaf(struct devlink_rate *devlink_rate)
+{
+ return devlink_rate->type == DEVLINK_RATE_TYPE_LEAF;
+}
+
+static inline bool
+devlink_rate_is_node(struct devlink_rate *devlink_rate)
+{
+ return devlink_rate->type == DEVLINK_RATE_TYPE_NODE;
+}
+
+static struct devlink_rate *
+devlink_rate_leaf_get_from_info(struct devlink *devlink, struct genl_info *info)
+{
+ struct devlink_rate *devlink_rate;
+ struct devlink_port *devlink_port;
+
+ devlink_port = devlink_port_get_from_attrs(devlink, info->attrs);
+ if (IS_ERR(devlink_port))
+ return ERR_CAST(devlink_port);
+ devlink_rate = devlink_port->devlink_rate;
+ return devlink_rate ?: ERR_PTR(-ENODEV);
+}
+
+static struct devlink_rate *
+devlink_rate_node_get_by_name(struct devlink *devlink, const char *node_name)
+{
+ static struct devlink_rate *devlink_rate;
+
+ list_for_each_entry(devlink_rate, &devlink->rate_list, list) {
+ if (devlink_rate_is_node(devlink_rate) &&
+ !strcmp(node_name, devlink_rate->name))
+ return devlink_rate;
+ }
+ return ERR_PTR(-ENODEV);
+}
+
+static struct devlink_rate *
+devlink_rate_node_get_from_attrs(struct devlink *devlink, struct nlattr **attrs)
+{
+ const char *rate_node_name;
+ size_t len;
+
+ if (!attrs[DEVLINK_ATTR_RATE_NODE_NAME])
+ return ERR_PTR(-EINVAL);
+ rate_node_name = nla_data(attrs[DEVLINK_ATTR_RATE_NODE_NAME]);
+ len = strlen(rate_node_name);
+ /* Name cannot be empty or decimal number */
+ if (!len || strspn(rate_node_name, "0123456789") == len)
+ return ERR_PTR(-EINVAL);
+
+ return devlink_rate_node_get_by_name(devlink, rate_node_name);
+}
+
+struct devlink_rate *
+devlink_rate_node_get_from_info(struct devlink *devlink, struct genl_info *info)
+{
+ return devlink_rate_node_get_from_attrs(devlink, info->attrs);
+}
+
+struct devlink_rate *
+devlink_rate_get_from_info(struct devlink *devlink, struct genl_info *info)
+{
+ struct nlattr **attrs = info->attrs;
+
+ if (attrs[DEVLINK_ATTR_PORT_INDEX])
+ return devlink_rate_leaf_get_from_info(devlink, info);
+ else if (attrs[DEVLINK_ATTR_RATE_NODE_NAME])
+ return devlink_rate_node_get_from_info(devlink, info);
+ else
+ return ERR_PTR(-EINVAL);
+}
+
+static struct devlink_linecard *
+devlink_linecard_get_by_index(struct devlink *devlink,
+ unsigned int linecard_index)
+{
+ struct devlink_linecard *devlink_linecard;
+
+ list_for_each_entry(devlink_linecard, &devlink->linecard_list, list) {
+ if (devlink_linecard->index == linecard_index)
+ return devlink_linecard;
+ }
+ return NULL;
+}
+
+static bool devlink_linecard_index_exists(struct devlink *devlink,
+ unsigned int linecard_index)
+{
+ return devlink_linecard_get_by_index(devlink, linecard_index);
+}
+
+static struct devlink_linecard *
+devlink_linecard_get_from_attrs(struct devlink *devlink, struct nlattr **attrs)
+{
+ if (attrs[DEVLINK_ATTR_LINECARD_INDEX]) {
+ u32 linecard_index = nla_get_u32(attrs[DEVLINK_ATTR_LINECARD_INDEX]);
+ struct devlink_linecard *linecard;
+
+ linecard = devlink_linecard_get_by_index(devlink, linecard_index);
+ if (!linecard)
+ return ERR_PTR(-ENODEV);
+ return linecard;
+ }
+ return ERR_PTR(-EINVAL);
+}
+
+struct devlink_linecard *
+devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info)
+{
+ return devlink_linecard_get_from_attrs(devlink, info->attrs);
+}
+
+struct devlink_sb {
+ struct list_head list;
+ unsigned int index;
+ u32 size;
+ u16 ingress_pools_count;
+ u16 egress_pools_count;
+ u16 ingress_tc_count;
+ u16 egress_tc_count;
+};
+
+static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
+{
+ return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
+}
+
+static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
+ unsigned int sb_index)
+{
+ struct devlink_sb *devlink_sb;
+
+ list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
+ if (devlink_sb->index == sb_index)
+ return devlink_sb;
+ }
+ return NULL;
+}
+
+static bool devlink_sb_index_exists(struct devlink *devlink,
+ unsigned int sb_index)
+{
+ return devlink_sb_get_by_index(devlink, sb_index);
+}
+
+static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
+ struct nlattr **attrs)
+{
+ if (attrs[DEVLINK_ATTR_SB_INDEX]) {
+ u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
+ struct devlink_sb *devlink_sb;
+
+ devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
+ if (!devlink_sb)
+ return ERR_PTR(-ENODEV);
+ return devlink_sb;
+ }
+ return ERR_PTR(-EINVAL);
+}
+
+static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
+ struct genl_info *info)
+{
+ return devlink_sb_get_from_attrs(devlink, info->attrs);
+}
+
+static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
+ struct nlattr **attrs,
+ u16 *p_pool_index)
+{
+ u16 val;
+
+ if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
+ return -EINVAL;
+
+ val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
+ if (val >= devlink_sb_pool_count(devlink_sb))
+ return -EINVAL;
+ *p_pool_index = val;
+ return 0;
+}
+
+static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
+ struct genl_info *info,
+ u16 *p_pool_index)
+{
+ return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
+ p_pool_index);
+}
+
+static int
+devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
+ enum devlink_sb_pool_type *p_pool_type)
+{
+ u8 val;
+
+ if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
+ return -EINVAL;
+
+ val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
+ if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
+ val != DEVLINK_SB_POOL_TYPE_EGRESS)
+ return -EINVAL;
+ *p_pool_type = val;
+ return 0;
+}
+
+static int
+devlink_sb_pool_type_get_from_info(struct genl_info *info,
+ enum devlink_sb_pool_type *p_pool_type)
+{
+ return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
+}
+
+static int
+devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
+ enum devlink_sb_threshold_type *p_th_type)
+{
+ u8 val;
+
+ if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
+ return -EINVAL;
+
+ val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
+ if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
+ val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
+ return -EINVAL;
+ *p_th_type = val;
+ return 0;
+}
+
+static int
+devlink_sb_th_type_get_from_info(struct genl_info *info,
+ enum devlink_sb_threshold_type *p_th_type)
+{
+ return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
+}
+
+static int
+devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
+ struct nlattr **attrs,
+ enum devlink_sb_pool_type pool_type,
+ u16 *p_tc_index)
+{
+ u16 val;
+
+ if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
+ return -EINVAL;
+
+ val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
+ if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
+ val >= devlink_sb->ingress_tc_count)
+ return -EINVAL;
+ if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
+ val >= devlink_sb->egress_tc_count)
+ return -EINVAL;
+ *p_tc_index = val;
+ return 0;
+}
+
+static void devlink_port_fn_cap_fill(struct nla_bitfield32 *caps,
+ u32 cap, bool is_enable)
+{
+ caps->selector |= cap;
+ if (is_enable)
+ caps->value |= cap;
+}
+
+static int devlink_port_fn_roce_fill(const struct devlink_ops *ops,
+ struct devlink_port *devlink_port,
+ struct nla_bitfield32 *caps,
+ struct netlink_ext_ack *extack)
+{
+ bool is_enable;
+ int err;
+
+ if (!ops->port_fn_roce_get)
+ return 0;
+
+ err = ops->port_fn_roce_get(devlink_port, &is_enable, extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+
+ devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_ROCE, is_enable);
+ return 0;
+}
+
+static int devlink_port_fn_migratable_fill(const struct devlink_ops *ops,
+ struct devlink_port *devlink_port,
+ struct nla_bitfield32 *caps,
+ struct netlink_ext_ack *extack)
+{
+ bool is_enable;
+ int err;
+
+ if (!ops->port_fn_migratable_get ||
+ devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
+ return 0;
+
+ err = ops->port_fn_migratable_get(devlink_port, &is_enable, extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+
+ devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_MIGRATABLE, is_enable);
+ return 0;
+}
+
+static int devlink_port_fn_caps_fill(const struct devlink_ops *ops,
+ struct devlink_port *devlink_port,
+ struct sk_buff *msg,
+ struct netlink_ext_ack *extack,
+ bool *msg_updated)
+{
+ struct nla_bitfield32 caps = {};
+ int err;
+
+ err = devlink_port_fn_roce_fill(ops, devlink_port, &caps, extack);
+ if (err)
+ return err;
+
+ err = devlink_port_fn_migratable_fill(ops, devlink_port, &caps, extack);
+ if (err)
+ return err;
+
+ if (!caps.selector)
+ return 0;
+ err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value,
+ caps.selector);
+ if (err)
+ return err;
+
+ *msg_updated = true;
+ return 0;
+}
+
+static int
+devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
+ struct genl_info *info,
+ enum devlink_sb_pool_type pool_type,
+ u16 *p_tc_index)
+{
+ return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
+ pool_type, p_tc_index);
+}
+
+struct devlink_region {
+ struct devlink *devlink;
+ struct devlink_port *port;
+ struct list_head list;
+ union {
+ const struct devlink_region_ops *ops;
+ const struct devlink_port_region_ops *port_ops;
+ };
+ struct mutex snapshot_lock; /* protects snapshot_list,
+ * max_snapshots and cur_snapshots
+ * consistency.
+ */
+ struct list_head snapshot_list;
+ u32 max_snapshots;
+ u32 cur_snapshots;
+ u64 size;
+};
+
+struct devlink_snapshot {
+ struct list_head list;
+ struct devlink_region *region;
+ u8 *data;
+ u32 id;
+};
+
+static struct devlink_region *
+devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
+{
+ struct devlink_region *region;
+
+ list_for_each_entry(region, &devlink->region_list, list)
+ if (!strcmp(region->ops->name, region_name))
+ return region;
+
+ return NULL;
+}
+
+static struct devlink_region *
+devlink_port_region_get_by_name(struct devlink_port *port,
+ const char *region_name)
+{
+ struct devlink_region *region;
+
+ list_for_each_entry(region, &port->region_list, list)
+ if (!strcmp(region->ops->name, region_name))
+ return region;
+
+ return NULL;
+}
+
+static struct devlink_snapshot *
+devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
+{
+ struct devlink_snapshot *snapshot;
+
+ list_for_each_entry(snapshot, ®ion->snapshot_list, list)
+ if (snapshot->id == id)
+ return snapshot;
+
+ return NULL;
+}
+
+static int devlink_nl_put_nested_handle(struct sk_buff *msg, struct devlink *devlink)
+{
+ struct nlattr *nested_attr;
+
+ nested_attr = nla_nest_start(msg, DEVLINK_ATTR_NESTED_DEVLINK);
+ if (!nested_attr)
+ return -EMSGSIZE;
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, nested_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, nested_attr);
+ return -EMSGSIZE;
+}
+
+int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port)
+{
+ if (devlink_nl_put_handle(msg, devlink_port->devlink))
+ return -EMSGSIZE;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
+ return -EMSGSIZE;
+ return 0;
+}
+
+size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port)
+{
+ struct devlink *devlink = devlink_port->devlink;
+
+ return nla_total_size(strlen(devlink->dev->bus->name) + 1) /* DEVLINK_ATTR_BUS_NAME */
+ + nla_total_size(strlen(dev_name(devlink->dev)) + 1) /* DEVLINK_ATTR_DEV_NAME */
+ + nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */
+}
+
+static int devlink_nl_port_attrs_put(struct sk_buff *msg,
+ struct devlink_port *devlink_port)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+
+ if (!devlink_port->attrs_set)
+ return 0;
+ if (attrs->lanes) {
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes))
+ return -EMSGSIZE;
+ }
+ if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable))
+ return -EMSGSIZE;
+ if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
+ return -EMSGSIZE;
+ switch (devlink_port->attrs.flavour) {
+ case DEVLINK_PORT_FLAVOUR_PCI_PF:
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
+ attrs->pci_pf.controller) ||
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf))
+ return -EMSGSIZE;
+ if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external))
+ return -EMSGSIZE;
+ break;
+ case DEVLINK_PORT_FLAVOUR_PCI_VF:
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
+ attrs->pci_vf.controller) ||
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) ||
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf))
+ return -EMSGSIZE;
+ if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external))
+ return -EMSGSIZE;
+ break;
+ case DEVLINK_PORT_FLAVOUR_PCI_SF:
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
+ attrs->pci_sf.controller) ||
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
+ attrs->pci_sf.pf) ||
+ nla_put_u32(msg, DEVLINK_ATTR_PORT_PCI_SF_NUMBER,
+ attrs->pci_sf.sf))
+ return -EMSGSIZE;
+ break;
+ case DEVLINK_PORT_FLAVOUR_PHYSICAL:
+ case DEVLINK_PORT_FLAVOUR_CPU:
+ case DEVLINK_PORT_FLAVOUR_DSA:
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
+ attrs->phys.port_number))
+ return -EMSGSIZE;
+ if (!attrs->split)
+ return 0;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
+ attrs->phys.port_number))
+ return -EMSGSIZE;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
+ attrs->phys.split_subport_number))
+ return -EMSGSIZE;
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+static int devlink_port_fn_hw_addr_fill(const struct devlink_ops *ops,
+ struct devlink_port *port,
+ struct sk_buff *msg,
+ struct netlink_ext_ack *extack,
+ bool *msg_updated)
+{
+ u8 hw_addr[MAX_ADDR_LEN];
+ int hw_addr_len;
+ int err;
+
+ if (!ops->port_function_hw_addr_get)
+ return 0;
+
+ err = ops->port_function_hw_addr_get(port, hw_addr, &hw_addr_len,
+ extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+ err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr);
+ if (err)
+ return err;
+ *msg_updated = true;
+ return 0;
+}
+
+static int devlink_nl_rate_fill(struct sk_buff *msg,
+ struct devlink_rate *devlink_rate,
+ enum devlink_command cmd, u32 portid, u32 seq,
+ int flags, struct netlink_ext_ack *extack)
+{
+ struct devlink *devlink = devlink_rate->devlink;
+ void *hdr;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+
+ if (nla_put_u16(msg, DEVLINK_ATTR_RATE_TYPE, devlink_rate->type))
+ goto nla_put_failure;
+
+ if (devlink_rate_is_leaf(devlink_rate)) {
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
+ devlink_rate->devlink_port->index))
+ goto nla_put_failure;
+ } else if (devlink_rate_is_node(devlink_rate)) {
+ if (nla_put_string(msg, DEVLINK_ATTR_RATE_NODE_NAME,
+ devlink_rate->name))
+ goto nla_put_failure;
+ }
+
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_RATE_TX_SHARE,
+ devlink_rate->tx_share, DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_RATE_TX_MAX,
+ devlink_rate->tx_max, DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ if (nla_put_u32(msg, DEVLINK_ATTR_RATE_TX_PRIORITY,
+ devlink_rate->tx_priority))
+ goto nla_put_failure;
+
+ if (nla_put_u32(msg, DEVLINK_ATTR_RATE_TX_WEIGHT,
+ devlink_rate->tx_weight))
+ goto nla_put_failure;
+
+ if (devlink_rate->parent)
+ if (nla_put_string(msg, DEVLINK_ATTR_RATE_PARENT_NODE_NAME,
+ devlink_rate->parent->name))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static bool
+devlink_port_fn_state_valid(enum devlink_port_fn_state state)
+{
+ return state == DEVLINK_PORT_FN_STATE_INACTIVE ||
+ state == DEVLINK_PORT_FN_STATE_ACTIVE;
+}
+
+static bool
+devlink_port_fn_opstate_valid(enum devlink_port_fn_opstate opstate)
+{
+ return opstate == DEVLINK_PORT_FN_OPSTATE_DETACHED ||
+ opstate == DEVLINK_PORT_FN_OPSTATE_ATTACHED;
+}
+
+static int devlink_port_fn_state_fill(const struct devlink_ops *ops,
+ struct devlink_port *port,
+ struct sk_buff *msg,
+ struct netlink_ext_ack *extack,
+ bool *msg_updated)
+{
+ enum devlink_port_fn_opstate opstate;
+ enum devlink_port_fn_state state;
+ int err;
+
+ if (!ops->port_fn_state_get)
+ return 0;
+
+ err = ops->port_fn_state_get(port, &state, &opstate, extack);
+ if (err) {
+ if (err == -EOPNOTSUPP)
+ return 0;
+ return err;
+ }
+ if (!devlink_port_fn_state_valid(state)) {
+ WARN_ON_ONCE(1);
+ NL_SET_ERR_MSG_MOD(extack, "Invalid state read from driver");
+ return -EINVAL;
+ }
+ if (!devlink_port_fn_opstate_valid(opstate)) {
+ WARN_ON_ONCE(1);
+ NL_SET_ERR_MSG_MOD(extack,
+ "Invalid operational state read from driver");
+ return -EINVAL;
+ }
+ if (nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_STATE, state) ||
+ nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_OPSTATE, opstate))
+ return -EMSGSIZE;
+ *msg_updated = true;
+ return 0;
+}
+
+static int
+devlink_port_fn_mig_set(struct devlink_port *devlink_port, bool enable,
+ struct netlink_ext_ack *extack)
+{
+ const struct devlink_ops *ops = devlink_port->devlink->ops;
+
+ return ops->port_fn_migratable_set(devlink_port, enable, extack);
+}
+
+static int
+devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable,
+ struct netlink_ext_ack *extack)
+{
+ const struct devlink_ops *ops = devlink_port->devlink->ops;
+
+ return ops->port_fn_roce_set(devlink_port, enable, extack);
+}
+
+static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack)
+{
+ struct nla_bitfield32 caps;
+ u32 caps_value;
+ int err;
+
+ caps = nla_get_bitfield32(attr);
+ caps_value = caps.value & caps.selector;
+ if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE) {
+ err = devlink_port_fn_roce_set(devlink_port,
+ caps_value & DEVLINK_PORT_FN_CAP_ROCE,
+ extack);
+ if (err)
+ return err;
+ }
+ if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) {
+ err = devlink_port_fn_mig_set(devlink_port, caps_value &
+ DEVLINK_PORT_FN_CAP_MIGRATABLE,
+ extack);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
+static int
+devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port,
+ struct netlink_ext_ack *extack)
+{
+ const struct devlink_ops *ops;
+ struct nlattr *function_attr;
+ bool msg_updated = false;
+ int err;
+
+ function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION);
+ if (!function_attr)
+ return -EMSGSIZE;
+
+ ops = port->devlink->ops;
+ err = devlink_port_fn_hw_addr_fill(ops, port, msg, extack,
+ &msg_updated);
+ if (err)
+ goto out;
+ err = devlink_port_fn_caps_fill(ops, port, msg, extack,
+ &msg_updated);
+ if (err)
+ goto out;
+ err = devlink_port_fn_state_fill(ops, port, msg, extack, &msg_updated);
+out:
+ if (err || !msg_updated)
+ nla_nest_cancel(msg, function_attr);
+ else
+ nla_nest_end(msg, function_attr);
+ return err;
+}
+
+static int devlink_nl_port_fill(struct sk_buff *msg,
+ struct devlink_port *devlink_port,
+ enum devlink_command cmd, u32 portid, u32 seq,
+ int flags, struct netlink_ext_ack *extack)
+{
+ struct devlink *devlink = devlink_port->devlink;
+ void *hdr;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
+ goto nla_put_failure;
+
+ spin_lock_bh(&devlink_port->type_lock);
+ if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
+ goto nla_put_failure_type_locked;
+ if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
+ nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
+ devlink_port->desired_type))
+ goto nla_put_failure_type_locked;
+ if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
+ if (devlink_port->type_eth.netdev &&
+ (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
+ devlink_port->type_eth.ifindex) ||
+ nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
+ devlink_port->type_eth.ifname)))
+ goto nla_put_failure_type_locked;
+ }
+ if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
+ struct ib_device *ibdev = devlink_port->type_ib.ibdev;
+
+ if (ibdev &&
+ nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
+ ibdev->name))
+ goto nla_put_failure_type_locked;
+ }
+ spin_unlock_bh(&devlink_port->type_lock);
+ if (devlink_nl_port_attrs_put(msg, devlink_port))
+ goto nla_put_failure;
+ if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack))
+ goto nla_put_failure;
+ if (devlink_port->linecard &&
+ nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX,
+ devlink_port->linecard->index))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure_type_locked:
+ spin_unlock_bh(&devlink_port->type_lock);
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static void devlink_port_notify(struct devlink_port *devlink_port,
+ enum devlink_command cmd)
+{
+ struct devlink *devlink = devlink_port->devlink;
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
+
+ if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
+ 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static void devlink_rate_notify(struct devlink_rate *devlink_rate,
+ enum devlink_command cmd)
+{
+ struct devlink *devlink = devlink_rate->devlink;
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON(cmd != DEVLINK_CMD_RATE_NEW && cmd != DEVLINK_CMD_RATE_DEL);
+
+ if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ err = devlink_nl_rate_fill(msg, devlink_rate, cmd, 0, 0, 0, NULL);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
+ 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static int
+devlink_nl_cmd_rate_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_rate *devlink_rate;
+ int idx = 0;
+ int err = 0;
+
+ list_for_each_entry(devlink_rate, &devlink->rate_list, list) {
+ enum devlink_command cmd = DEVLINK_CMD_RATE_NEW;
+ u32 id = NETLINK_CB(cb->skb).portid;
+
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_rate_fill(msg, devlink_rate, cmd, id,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI, NULL);
+ if (err) {
+ state->idx = idx;
+ break;
+ }
+ idx++;
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_rate_get = {
+ .dump_one = devlink_nl_cmd_rate_get_dump_one,
+};
+
+static int devlink_nl_cmd_rate_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_rate *devlink_rate = info->user_ptr[1];
+ struct sk_buff *msg;
+ int err;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_rate_fill(msg, devlink_rate, DEVLINK_CMD_RATE_NEW,
+ info->snd_portid, info->snd_seq, 0,
+ info->extack);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static bool
+devlink_rate_is_parent_node(struct devlink_rate *devlink_rate,
+ struct devlink_rate *parent)
+{
+ while (parent) {
+ if (parent == devlink_rate)
+ return true;
+ parent = parent->parent;
+ }
+ return false;
+}
+
+static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct sk_buff *msg;
+ int err;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW,
+ info->snd_portid, info->snd_seq, 0,
+ info->extack);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int
+devlink_nl_cmd_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_port *devlink_port;
+ unsigned long port_index;
+ int idx = 0;
+ int err = 0;
+
+ xa_for_each(&devlink->ports, port_index, devlink_port) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_port_fill(msg, devlink_port,
+ DEVLINK_CMD_NEW,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI, cb->extack);
+ if (err) {
+ state->idx = idx;
+ break;
+ }
+ idx++;
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_port_get = {
+ .dump_one = devlink_nl_cmd_port_get_dump_one,
+};
+
+static int devlink_port_type_set(struct devlink_port *devlink_port,
+ enum devlink_port_type port_type)
+
+{
+ int err;
+
+ if (!devlink_port->devlink->ops->port_type_set)
+ return -EOPNOTSUPP;
+
+ if (port_type == devlink_port->type)
+ return 0;
+
+ err = devlink_port->devlink->ops->port_type_set(devlink_port,
+ port_type);
+ if (err)
+ return err;
+
+ devlink_port->desired_type = port_type;
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
+ return 0;
+}
+
+static int devlink_port_function_hw_addr_set(struct devlink_port *port,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack)
+{
+ const struct devlink_ops *ops = port->devlink->ops;
+ const u8 *hw_addr;
+ int hw_addr_len;
+
+ hw_addr = nla_data(attr);
+ hw_addr_len = nla_len(attr);
+ if (hw_addr_len > MAX_ADDR_LEN) {
+ NL_SET_ERR_MSG_MOD(extack, "Port function hardware address too long");
+ return -EINVAL;
+ }
+ if (port->type == DEVLINK_PORT_TYPE_ETH) {
+ if (hw_addr_len != ETH_ALEN) {
+ NL_SET_ERR_MSG_MOD(extack, "Address must be 6 bytes for Ethernet device");
+ return -EINVAL;
+ }
+ if (!is_unicast_ether_addr(hw_addr)) {
+ NL_SET_ERR_MSG_MOD(extack, "Non-unicast hardware address unsupported");
+ return -EINVAL;
+ }
+ }
+
+ return ops->port_function_hw_addr_set(port, hw_addr, hw_addr_len,
+ extack);
+}
+
+static int devlink_port_fn_state_set(struct devlink_port *port,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack)
+{
+ enum devlink_port_fn_state state;
+ const struct devlink_ops *ops;
+
+ state = nla_get_u8(attr);
+ ops = port->devlink->ops;
+ return ops->port_fn_state_set(port, state, extack);
+}
+
+static int devlink_port_function_validate(struct devlink_port *devlink_port,
+ struct nlattr **tb,
+ struct netlink_ext_ack *extack)
+{
+ const struct devlink_ops *ops = devlink_port->devlink->ops;
+ struct nlattr *attr;
+
+ if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] &&
+ !ops->port_function_hw_addr_set) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
+ "Port doesn't support function attributes");
+ return -EOPNOTSUPP;
+ }
+ if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
+ "Function does not support state setting");
+ return -EOPNOTSUPP;
+ }
+ attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
+ if (attr) {
+ struct nla_bitfield32 caps;
+
+ caps = nla_get_bitfield32(attr);
+ if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE &&
+ !ops->port_fn_roce_set) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Port doesn't support RoCE function attribute");
+ return -EOPNOTSUPP;
+ }
+ if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) {
+ if (!ops->port_fn_migratable_set) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "Port doesn't support migratable function attribute");
+ return -EOPNOTSUPP;
+ }
+ if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
+ NL_SET_ERR_MSG_ATTR(extack, attr,
+ "migratable function attribute supported for VFs only");
+ return -EOPNOTSUPP;
+ }
+ }
+ }
+ return 0;
+}
+
+static int devlink_port_function_set(struct devlink_port *port,
+ const struct nlattr *attr,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
+ int err;
+
+ err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
+ devlink_function_nl_policy, extack);
+ if (err < 0) {
+ NL_SET_ERR_MSG_MOD(extack, "Fail to parse port function attributes");
+ return err;
+ }
+
+ err = devlink_port_function_validate(port, tb, extack);
+ if (err)
+ return err;
+
+ attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
+ if (attr) {
+ err = devlink_port_function_hw_addr_set(port, attr, extack);
+ if (err)
+ return err;
+ }
+
+ attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
+ if (attr) {
+ err = devlink_port_fn_caps_set(port, attr, extack);
+ if (err)
+ return err;
+ }
+
+ /* Keep this as the last function attribute set, so that when
+ * multiple port function attributes are set along with state,
+ * Those can be applied first before activating the state.
+ */
+ attr = tb[DEVLINK_PORT_FN_ATTR_STATE];
+ if (attr)
+ err = devlink_port_fn_state_set(port, attr, extack);
+
+ if (!err)
+ devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
+ return err;
+}
+
+static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ int err;
+
+ if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
+ enum devlink_port_type port_type;
+
+ port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
+ err = devlink_port_type_set(devlink_port, port_type);
+ if (err)
+ return err;
+ }
+
+ if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) {
+ struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION];
+ struct netlink_ext_ack *extack = info->extack;
+
+ err = devlink_port_function_set(devlink_port, attr, extack);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct devlink *devlink = info->user_ptr[0];
+ u32 count;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT))
+ return -EINVAL;
+ if (!devlink->ops->port_split)
+ return -EOPNOTSUPP;
+
+ count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
+
+ if (!devlink_port->attrs.splittable) {
+ /* Split ports cannot be split. */
+ if (devlink_port->attrs.split)
+ NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split further");
+ else
+ NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split");
+ return -EINVAL;
+ }
+
+ if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Invalid split count");
+ return -EINVAL;
+ }
+
+ return devlink->ops->port_split(devlink, devlink_port, count,
+ info->extack);
+}
+
+static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct devlink *devlink = info->user_ptr[0];
+
+ if (!devlink->ops->port_unsplit)
+ return -EOPNOTSUPP;
+ return devlink->ops->port_unsplit(devlink, devlink_port, info->extack);
+}
+
+static int devlink_port_new_notify(struct devlink *devlink,
+ unsigned int port_index,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port;
+ struct sk_buff *msg;
+ int err;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ lockdep_assert_held(&devlink->lock);
+ devlink_port = devlink_port_get_by_index(devlink, port_index);
+ if (!devlink_port) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW,
+ info->snd_portid, info->snd_seq, 0, NULL);
+ if (err)
+ goto out;
+
+ return genlmsg_reply(msg, info);
+
+out:
+ nlmsg_free(msg);
+ return err;
+}
+
+static int devlink_nl_cmd_port_new_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink_port_new_attrs new_attrs = {};
+ struct devlink *devlink = info->user_ptr[0];
+ unsigned int new_port_index;
+ int err;
+
+ if (!devlink->ops->port_new || !devlink->ops->port_del)
+ return -EOPNOTSUPP;
+
+ if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] ||
+ !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) {
+ NL_SET_ERR_MSG_MOD(extack, "Port flavour or PCI PF are not specified");
+ return -EINVAL;
+ }
+ new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]);
+ new_attrs.pfnum =
+ nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]);
+
+ if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
+ /* Port index of the new port being created by driver. */
+ new_attrs.port_index =
+ nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
+ new_attrs.port_index_valid = true;
+ }
+ if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) {
+ new_attrs.controller =
+ nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]);
+ new_attrs.controller_valid = true;
+ }
+ if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF &&
+ info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) {
+ new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]);
+ new_attrs.sfnum_valid = true;
+ }
+
+ err = devlink->ops->port_new(devlink, &new_attrs, extack,
+ &new_port_index);
+ if (err)
+ return err;
+
+ err = devlink_port_new_notify(devlink, new_port_index, info);
+ if (err && err != -ENODEV) {
+ /* Fail to send the response; destroy newly created port. */
+ devlink->ops->port_del(devlink, new_port_index, extack);
+ }
+ return err;
+}
+
+static int devlink_nl_cmd_port_del_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink *devlink = info->user_ptr[0];
+ unsigned int port_index;
+
+ if (!devlink->ops->port_del)
+ return -EOPNOTSUPP;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_INDEX)) {
+ NL_SET_ERR_MSG_MOD(extack, "Port index is not specified");
+ return -EINVAL;
+ }
+ port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
+
+ return devlink->ops->port_del(devlink, port_index, extack);
+}
+
+static int
+devlink_nl_rate_parent_node_set(struct devlink_rate *devlink_rate,
+ struct genl_info *info,
+ struct nlattr *nla_parent)
+{
+ struct devlink *devlink = devlink_rate->devlink;
+ const char *parent_name = nla_data(nla_parent);
+ const struct devlink_ops *ops = devlink->ops;
+ size_t len = strlen(parent_name);
+ struct devlink_rate *parent;
+ int err = -EOPNOTSUPP;
+
+ parent = devlink_rate->parent;
+
+ if (parent && !len) {
+ if (devlink_rate_is_leaf(devlink_rate))
+ err = ops->rate_leaf_parent_set(devlink_rate, NULL,
+ devlink_rate->priv, NULL,
+ info->extack);
+ else if (devlink_rate_is_node(devlink_rate))
+ err = ops->rate_node_parent_set(devlink_rate, NULL,
+ devlink_rate->priv, NULL,
+ info->extack);
+ if (err)
+ return err;
+
+ refcount_dec(&parent->refcnt);
+ devlink_rate->parent = NULL;
+ } else if (len) {
+ parent = devlink_rate_node_get_by_name(devlink, parent_name);
+ if (IS_ERR(parent))
+ return -ENODEV;
+
+ if (parent == devlink_rate) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Parent to self is not allowed");
+ return -EINVAL;
+ }
+
+ if (devlink_rate_is_node(devlink_rate) &&
+ devlink_rate_is_parent_node(devlink_rate, parent->parent)) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Node is already a parent of parent node.");
+ return -EEXIST;
+ }
+
+ if (devlink_rate_is_leaf(devlink_rate))
+ err = ops->rate_leaf_parent_set(devlink_rate, parent,
+ devlink_rate->priv, parent->priv,
+ info->extack);
+ else if (devlink_rate_is_node(devlink_rate))
+ err = ops->rate_node_parent_set(devlink_rate, parent,
+ devlink_rate->priv, parent->priv,
+ info->extack);
+ if (err)
+ return err;
+
+ if (devlink_rate->parent)
+ /* we're reassigning to other parent in this case */
+ refcount_dec(&devlink_rate->parent->refcnt);
+
+ refcount_inc(&parent->refcnt);
+ devlink_rate->parent = parent;
+ }
+
+ return 0;
+}
+
+static int devlink_nl_rate_set(struct devlink_rate *devlink_rate,
+ const struct devlink_ops *ops,
+ struct genl_info *info)
+{
+ struct nlattr *nla_parent, **attrs = info->attrs;
+ int err = -EOPNOTSUPP;
+ u32 priority;
+ u32 weight;
+ u64 rate;
+
+ if (attrs[DEVLINK_ATTR_RATE_TX_SHARE]) {
+ rate = nla_get_u64(attrs[DEVLINK_ATTR_RATE_TX_SHARE]);
+ if (devlink_rate_is_leaf(devlink_rate))
+ err = ops->rate_leaf_tx_share_set(devlink_rate, devlink_rate->priv,
+ rate, info->extack);
+ else if (devlink_rate_is_node(devlink_rate))
+ err = ops->rate_node_tx_share_set(devlink_rate, devlink_rate->priv,
+ rate, info->extack);
+ if (err)
+ return err;
+ devlink_rate->tx_share = rate;
+ }
+
+ if (attrs[DEVLINK_ATTR_RATE_TX_MAX]) {
+ rate = nla_get_u64(attrs[DEVLINK_ATTR_RATE_TX_MAX]);
+ if (devlink_rate_is_leaf(devlink_rate))
+ err = ops->rate_leaf_tx_max_set(devlink_rate, devlink_rate->priv,
+ rate, info->extack);
+ else if (devlink_rate_is_node(devlink_rate))
+ err = ops->rate_node_tx_max_set(devlink_rate, devlink_rate->priv,
+ rate, info->extack);
+ if (err)
+ return err;
+ devlink_rate->tx_max = rate;
+ }
+
+ if (attrs[DEVLINK_ATTR_RATE_TX_PRIORITY]) {
+ priority = nla_get_u32(attrs[DEVLINK_ATTR_RATE_TX_PRIORITY]);
+ if (devlink_rate_is_leaf(devlink_rate))
+ err = ops->rate_leaf_tx_priority_set(devlink_rate, devlink_rate->priv,
+ priority, info->extack);
+ else if (devlink_rate_is_node(devlink_rate))
+ err = ops->rate_node_tx_priority_set(devlink_rate, devlink_rate->priv,
+ priority, info->extack);
+
+ if (err)
+ return err;
+ devlink_rate->tx_priority = priority;
+ }
+
+ if (attrs[DEVLINK_ATTR_RATE_TX_WEIGHT]) {
+ weight = nla_get_u32(attrs[DEVLINK_ATTR_RATE_TX_WEIGHT]);
+ if (devlink_rate_is_leaf(devlink_rate))
+ err = ops->rate_leaf_tx_weight_set(devlink_rate, devlink_rate->priv,
+ weight, info->extack);
+ else if (devlink_rate_is_node(devlink_rate))
+ err = ops->rate_node_tx_weight_set(devlink_rate, devlink_rate->priv,
+ weight, info->extack);
+
+ if (err)
+ return err;
+ devlink_rate->tx_weight = weight;
+ }
+
+ nla_parent = attrs[DEVLINK_ATTR_RATE_PARENT_NODE_NAME];
+ if (nla_parent) {
+ err = devlink_nl_rate_parent_node_set(devlink_rate, info,
+ nla_parent);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static bool devlink_rate_set_ops_supported(const struct devlink_ops *ops,
+ struct genl_info *info,
+ enum devlink_rate_type type)
+{
+ struct nlattr **attrs = info->attrs;
+
+ if (type == DEVLINK_RATE_TYPE_LEAF) {
+ if (attrs[DEVLINK_ATTR_RATE_TX_SHARE] && !ops->rate_leaf_tx_share_set) {
+ NL_SET_ERR_MSG_MOD(info->extack, "TX share set isn't supported for the leafs");
+ return false;
+ }
+ if (attrs[DEVLINK_ATTR_RATE_TX_MAX] && !ops->rate_leaf_tx_max_set) {
+ NL_SET_ERR_MSG_MOD(info->extack, "TX max set isn't supported for the leafs");
+ return false;
+ }
+ if (attrs[DEVLINK_ATTR_RATE_PARENT_NODE_NAME] &&
+ !ops->rate_leaf_parent_set) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Parent set isn't supported for the leafs");
+ return false;
+ }
+ if (attrs[DEVLINK_ATTR_RATE_TX_PRIORITY] && !ops->rate_leaf_tx_priority_set) {
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ attrs[DEVLINK_ATTR_RATE_TX_PRIORITY],
+ "TX priority set isn't supported for the leafs");
+ return false;
+ }
+ if (attrs[DEVLINK_ATTR_RATE_TX_WEIGHT] && !ops->rate_leaf_tx_weight_set) {
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ attrs[DEVLINK_ATTR_RATE_TX_WEIGHT],
+ "TX weight set isn't supported for the leafs");
+ return false;
+ }
+ } else if (type == DEVLINK_RATE_TYPE_NODE) {
+ if (attrs[DEVLINK_ATTR_RATE_TX_SHARE] && !ops->rate_node_tx_share_set) {
+ NL_SET_ERR_MSG_MOD(info->extack, "TX share set isn't supported for the nodes");
+ return false;
+ }
+ if (attrs[DEVLINK_ATTR_RATE_TX_MAX] && !ops->rate_node_tx_max_set) {
+ NL_SET_ERR_MSG_MOD(info->extack, "TX max set isn't supported for the nodes");
+ return false;
+ }
+ if (attrs[DEVLINK_ATTR_RATE_PARENT_NODE_NAME] &&
+ !ops->rate_node_parent_set) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Parent set isn't supported for the nodes");
+ return false;
+ }
+ if (attrs[DEVLINK_ATTR_RATE_TX_PRIORITY] && !ops->rate_node_tx_priority_set) {
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ attrs[DEVLINK_ATTR_RATE_TX_PRIORITY],
+ "TX priority set isn't supported for the nodes");
+ return false;
+ }
+ if (attrs[DEVLINK_ATTR_RATE_TX_WEIGHT] && !ops->rate_node_tx_weight_set) {
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ attrs[DEVLINK_ATTR_RATE_TX_WEIGHT],
+ "TX weight set isn't supported for the nodes");
+ return false;
+ }
+ } else {
+ WARN(1, "Unknown type of rate object");
+ return false;
+ }
+
+ return true;
+}
+
+static int devlink_nl_cmd_rate_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_rate *devlink_rate = info->user_ptr[1];
+ struct devlink *devlink = devlink_rate->devlink;
+ const struct devlink_ops *ops = devlink->ops;
+ int err;
+
+ if (!ops || !devlink_rate_set_ops_supported(ops, info, devlink_rate->type))
+ return -EOPNOTSUPP;
+
+ err = devlink_nl_rate_set(devlink_rate, ops, info);
+
+ if (!err)
+ devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_NEW);
+ return err;
+}
+
+static int devlink_nl_cmd_rate_new_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_rate *rate_node;
+ const struct devlink_ops *ops;
+ int err;
+
+ ops = devlink->ops;
+ if (!ops || !ops->rate_node_new || !ops->rate_node_del) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Rate nodes aren't supported");
+ return -EOPNOTSUPP;
+ }
+
+ if (!devlink_rate_set_ops_supported(ops, info, DEVLINK_RATE_TYPE_NODE))
+ return -EOPNOTSUPP;
+
+ rate_node = devlink_rate_node_get_from_attrs(devlink, info->attrs);
+ if (!IS_ERR(rate_node))
+ return -EEXIST;
+ else if (rate_node == ERR_PTR(-EINVAL))
+ return -EINVAL;
+
+ rate_node = kzalloc(sizeof(*rate_node), GFP_KERNEL);
+ if (!rate_node)
+ return -ENOMEM;
+
+ rate_node->devlink = devlink;
+ rate_node->type = DEVLINK_RATE_TYPE_NODE;
+ rate_node->name = nla_strdup(info->attrs[DEVLINK_ATTR_RATE_NODE_NAME], GFP_KERNEL);
+ if (!rate_node->name) {
+ err = -ENOMEM;
+ goto err_strdup;
+ }
+
+ err = ops->rate_node_new(rate_node, &rate_node->priv, info->extack);
+ if (err)
+ goto err_node_new;
+
+ err = devlink_nl_rate_set(rate_node, ops, info);
+ if (err)
+ goto err_rate_set;
+
+ refcount_set(&rate_node->refcnt, 1);
+ list_add(&rate_node->list, &devlink->rate_list);
+ devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_NEW);
+ return 0;
+
+err_rate_set:
+ ops->rate_node_del(rate_node, rate_node->priv, info->extack);
+err_node_new:
+ kfree(rate_node->name);
+err_strdup:
+ kfree(rate_node);
+ return err;
+}
+
+static int devlink_nl_cmd_rate_del_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_rate *rate_node = info->user_ptr[1];
+ struct devlink *devlink = rate_node->devlink;
+ const struct devlink_ops *ops = devlink->ops;
+ int err;
+
+ if (refcount_read(&rate_node->refcnt) > 1) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Node has children. Cannot delete node.");
+ return -EBUSY;
+ }
+
+ devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_DEL);
+ err = ops->rate_node_del(rate_node, rate_node->priv, info->extack);
+ if (rate_node->parent)
+ refcount_dec(&rate_node->parent->refcnt);
+ list_del(&rate_node->list);
+ kfree(rate_node->name);
+ kfree(rate_node);
+ return err;
+}
+
+struct devlink_linecard_type {
+ const char *type;
+ const void *priv;
+};
+
+static int devlink_nl_linecard_fill(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct devlink_linecard *linecard,
+ enum devlink_command cmd, u32 portid,
+ u32 seq, int flags,
+ struct netlink_ext_ack *extack)
+{
+ struct devlink_linecard_type *linecard_type;
+ struct nlattr *attr;
+ void *hdr;
+ int i;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, linecard->index))
+ goto nla_put_failure;
+ if (nla_put_u8(msg, DEVLINK_ATTR_LINECARD_STATE, linecard->state))
+ goto nla_put_failure;
+ if (linecard->type &&
+ nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, linecard->type))
+ goto nla_put_failure;
+
+ if (linecard->types_count) {
+ attr = nla_nest_start(msg,
+ DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES);
+ if (!attr)
+ goto nla_put_failure;
+ for (i = 0; i < linecard->types_count; i++) {
+ linecard_type = &linecard->types[i];
+ if (nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE,
+ linecard_type->type)) {
+ nla_nest_cancel(msg, attr);
+ goto nla_put_failure;
+ }
+ }
+ nla_nest_end(msg, attr);
+ }
+
+ if (linecard->nested_devlink &&
+ devlink_nl_put_nested_handle(msg, linecard->nested_devlink))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static void devlink_linecard_notify(struct devlink_linecard *linecard,
+ enum devlink_command cmd)
+{
+ struct devlink *devlink = linecard->devlink;
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON(cmd != DEVLINK_CMD_LINECARD_NEW &&
+ cmd != DEVLINK_CMD_LINECARD_DEL);
+
+ if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ err = devlink_nl_linecard_fill(msg, devlink, linecard, cmd, 0, 0, 0,
+ NULL);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
+ msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static int devlink_nl_cmd_linecard_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_linecard *linecard = info->user_ptr[1];
+ struct devlink *devlink = linecard->devlink;
+ struct sk_buff *msg;
+ int err;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ mutex_lock(&linecard->state_lock);
+ err = devlink_nl_linecard_fill(msg, devlink, linecard,
+ DEVLINK_CMD_LINECARD_NEW,
+ info->snd_portid, info->snd_seq, 0,
+ info->extack);
+ mutex_unlock(&linecard->state_lock);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int devlink_nl_cmd_linecard_get_dump_one(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_linecard *linecard;
+ int idx = 0;
+ int err = 0;
+
+ list_for_each_entry(linecard, &devlink->linecard_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ mutex_lock(&linecard->state_lock);
+ err = devlink_nl_linecard_fill(msg, devlink, linecard,
+ DEVLINK_CMD_LINECARD_NEW,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI,
+ cb->extack);
+ mutex_unlock(&linecard->state_lock);
+ if (err) {
+ state->idx = idx;
+ break;
+ }
+ idx++;
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_linecard_get = {
+ .dump_one = devlink_nl_cmd_linecard_get_dump_one,
+};
+
+static struct devlink_linecard_type *
+devlink_linecard_type_lookup(struct devlink_linecard *linecard,
+ const char *type)
+{
+ struct devlink_linecard_type *linecard_type;
+ int i;
+
+ for (i = 0; i < linecard->types_count; i++) {
+ linecard_type = &linecard->types[i];
+ if (!strcmp(type, linecard_type->type))
+ return linecard_type;
+ }
+ return NULL;
+}
+
+static int devlink_linecard_type_set(struct devlink_linecard *linecard,
+ const char *type,
+ struct netlink_ext_ack *extack)
+{
+ const struct devlink_linecard_ops *ops = linecard->ops;
+ struct devlink_linecard_type *linecard_type;
+ int err;
+
+ mutex_lock(&linecard->state_lock);
+ if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
+ NL_SET_ERR_MSG_MOD(extack, "Line card is currently being provisioned");
+ err = -EBUSY;
+ goto out;
+ }
+ if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
+ NL_SET_ERR_MSG_MOD(extack, "Line card is currently being unprovisioned");
+ err = -EBUSY;
+ goto out;
+ }
+
+ linecard_type = devlink_linecard_type_lookup(linecard, type);
+ if (!linecard_type) {
+ NL_SET_ERR_MSG_MOD(extack, "Unsupported line card type provided");
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONED &&
+ linecard->state != DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
+ NL_SET_ERR_MSG_MOD(extack, "Line card already provisioned");
+ err = -EBUSY;
+ /* Check if the line card is provisioned in the same
+ * way the user asks. In case it is, make the operation
+ * to return success.
+ */
+ if (ops->same_provision &&
+ ops->same_provision(linecard, linecard->priv,
+ linecard_type->type,
+ linecard_type->priv))
+ err = 0;
+ goto out;
+ }
+
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING;
+ linecard->type = linecard_type->type;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+ err = ops->provision(linecard, linecard->priv, linecard_type->type,
+ linecard_type->priv, extack);
+ if (err) {
+ /* Provisioning failed. Assume the linecard is unprovisioned
+ * for future operations.
+ */
+ mutex_lock(&linecard->state_lock);
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ linecard->type = NULL;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+ }
+ return err;
+
+out:
+ mutex_unlock(&linecard->state_lock);
+ return err;
+}
+
+static int devlink_linecard_type_unset(struct devlink_linecard *linecard,
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ mutex_lock(&linecard->state_lock);
+ if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
+ NL_SET_ERR_MSG_MOD(extack, "Line card is currently being provisioned");
+ err = -EBUSY;
+ goto out;
+ }
+ if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
+ NL_SET_ERR_MSG_MOD(extack, "Line card is currently being unprovisioned");
+ err = -EBUSY;
+ goto out;
+ }
+ if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ linecard->type = NULL;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ err = 0;
+ goto out;
+ }
+
+ if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONED) {
+ NL_SET_ERR_MSG_MOD(extack, "Line card is not provisioned");
+ err = 0;
+ goto out;
+ }
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONING;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+ err = linecard->ops->unprovision(linecard, linecard->priv,
+ extack);
+ if (err) {
+ /* Unprovisioning failed. Assume the linecard is unprovisioned
+ * for future operations.
+ */
+ mutex_lock(&linecard->state_lock);
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ linecard->type = NULL;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+ }
+ return err;
+
+out:
+ mutex_unlock(&linecard->state_lock);
+ return err;
+}
+
+static int devlink_nl_cmd_linecard_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_linecard *linecard = info->user_ptr[1];
+ struct netlink_ext_ack *extack = info->extack;
+ int err;
+
+ if (info->attrs[DEVLINK_ATTR_LINECARD_TYPE]) {
+ const char *type;
+
+ type = nla_data(info->attrs[DEVLINK_ATTR_LINECARD_TYPE]);
+ if (strcmp(type, "")) {
+ err = devlink_linecard_type_set(linecard, type, extack);
+ if (err)
+ return err;
+ } else {
+ err = devlink_linecard_type_unset(linecard, extack);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
+ struct devlink_sb *devlink_sb,
+ enum devlink_command cmd, u32 portid,
+ u32 seq, int flags)
+{
+ void *hdr;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
+ goto nla_put_failure;
+ if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
+ devlink_sb->ingress_pools_count))
+ goto nla_put_failure;
+ if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
+ devlink_sb->egress_pools_count))
+ goto nla_put_failure;
+ if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
+ devlink_sb->ingress_tc_count))
+ goto nla_put_failure;
+ if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
+ devlink_sb->egress_tc_count))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_sb *devlink_sb;
+ struct sk_buff *msg;
+ int err;
+
+ devlink_sb = devlink_sb_get_from_info(devlink, info);
+ if (IS_ERR(devlink_sb))
+ return PTR_ERR(devlink_sb);
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
+ DEVLINK_CMD_SB_NEW,
+ info->snd_portid, info->snd_seq, 0);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int
+devlink_nl_cmd_sb_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_sb *devlink_sb;
+ int idx = 0;
+ int err = 0;
+
+ list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
+ DEVLINK_CMD_SB_NEW,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI);
+ if (err) {
+ state->idx = idx;
+ break;
+ }
+ idx++;
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_sb_get = {
+ .dump_one = devlink_nl_cmd_sb_get_dump_one,
+};
+
+static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
+ struct devlink_sb *devlink_sb,
+ u16 pool_index, enum devlink_command cmd,
+ u32 portid, u32 seq, int flags)
+{
+ struct devlink_sb_pool_info pool_info;
+ void *hdr;
+ int err;
+
+ err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
+ pool_index, &pool_info);
+ if (err)
+ return err;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
+ goto nla_put_failure;
+ if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
+ goto nla_put_failure;
+ if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
+ goto nla_put_failure;
+ if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
+ pool_info.threshold_type))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
+ pool_info.cell_size))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_sb *devlink_sb;
+ struct sk_buff *msg;
+ u16 pool_index;
+ int err;
+
+ devlink_sb = devlink_sb_get_from_info(devlink, info);
+ if (IS_ERR(devlink_sb))
+ return PTR_ERR(devlink_sb);
+
+ err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
+ &pool_index);
+ if (err)
+ return err;
+
+ if (!devlink->ops->sb_pool_get)
+ return -EOPNOTSUPP;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
+ DEVLINK_CMD_SB_POOL_NEW,
+ info->snd_portid, info->snd_seq, 0);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
+ struct devlink *devlink,
+ struct devlink_sb *devlink_sb,
+ u32 portid, u32 seq)
+{
+ u16 pool_count = devlink_sb_pool_count(devlink_sb);
+ u16 pool_index;
+ int err;
+
+ for (pool_index = 0; pool_index < pool_count; pool_index++) {
+ if (*p_idx < start) {
+ (*p_idx)++;
+ continue;
+ }
+ err = devlink_nl_sb_pool_fill(msg, devlink,
+ devlink_sb,
+ pool_index,
+ DEVLINK_CMD_SB_POOL_NEW,
+ portid, seq, NLM_F_MULTI);
+ if (err)
+ return err;
+ (*p_idx)++;
+ }
+ return 0;
+}
+
+static int
+devlink_nl_cmd_sb_pool_get_dump_one(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_sb *devlink_sb;
+ int err = 0;
+ int idx = 0;
+
+ if (!devlink->ops->sb_pool_get)
+ return 0;
+
+ list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
+ err = __sb_pool_get_dumpit(msg, state->idx, &idx,
+ devlink, devlink_sb,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq);
+ if (err == -EOPNOTSUPP) {
+ err = 0;
+ } else if (err) {
+ state->idx = idx;
+ break;
+ }
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_sb_pool_get = {
+ .dump_one = devlink_nl_cmd_sb_pool_get_dump_one,
+};
+
+static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
+ u16 pool_index, u32 size,
+ enum devlink_sb_threshold_type threshold_type,
+ struct netlink_ext_ack *extack)
+
+{
+ const struct devlink_ops *ops = devlink->ops;
+
+ if (ops->sb_pool_set)
+ return ops->sb_pool_set(devlink, sb_index, pool_index,
+ size, threshold_type, extack);
+ return -EOPNOTSUPP;
+}
+
+static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ enum devlink_sb_threshold_type threshold_type;
+ struct devlink_sb *devlink_sb;
+ u16 pool_index;
+ u32 size;
+ int err;
+
+ devlink_sb = devlink_sb_get_from_info(devlink, info);
+ if (IS_ERR(devlink_sb))
+ return PTR_ERR(devlink_sb);
+
+ err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
+ &pool_index);
+ if (err)
+ return err;
+
+ err = devlink_sb_th_type_get_from_info(info, &threshold_type);
+ if (err)
+ return err;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SB_POOL_SIZE))
+ return -EINVAL;
+
+ size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
+ return devlink_sb_pool_set(devlink, devlink_sb->index,
+ pool_index, size, threshold_type,
+ info->extack);
+}
+
+static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct devlink_port *devlink_port,
+ struct devlink_sb *devlink_sb,
+ u16 pool_index,
+ enum devlink_command cmd,
+ u32 portid, u32 seq, int flags)
+{
+ const struct devlink_ops *ops = devlink->ops;
+ u32 threshold;
+ void *hdr;
+ int err;
+
+ err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
+ pool_index, &threshold);
+ if (err)
+ return err;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
+ goto nla_put_failure;
+ if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
+ goto nla_put_failure;
+
+ if (ops->sb_occ_port_pool_get) {
+ u32 cur;
+ u32 max;
+
+ err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
+ pool_index, &cur, &max);
+ if (err && err != -EOPNOTSUPP)
+ goto sb_occ_get_failure;
+ if (!err) {
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
+ goto nla_put_failure;
+ }
+ }
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure:
+ err = -EMSGSIZE;
+sb_occ_get_failure:
+ genlmsg_cancel(msg, hdr);
+ return err;
+}
+
+static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct devlink *devlink = devlink_port->devlink;
+ struct devlink_sb *devlink_sb;
+ struct sk_buff *msg;
+ u16 pool_index;
+ int err;
+
+ devlink_sb = devlink_sb_get_from_info(devlink, info);
+ if (IS_ERR(devlink_sb))
+ return PTR_ERR(devlink_sb);
+
+ err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
+ &pool_index);
+ if (err)
+ return err;
+
+ if (!devlink->ops->sb_port_pool_get)
+ return -EOPNOTSUPP;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
+ devlink_sb, pool_index,
+ DEVLINK_CMD_SB_PORT_POOL_NEW,
+ info->snd_portid, info->snd_seq, 0);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
+ struct devlink *devlink,
+ struct devlink_sb *devlink_sb,
+ u32 portid, u32 seq)
+{
+ struct devlink_port *devlink_port;
+ u16 pool_count = devlink_sb_pool_count(devlink_sb);
+ unsigned long port_index;
+ u16 pool_index;
+ int err;
+
+ xa_for_each(&devlink->ports, port_index, devlink_port) {
+ for (pool_index = 0; pool_index < pool_count; pool_index++) {
+ if (*p_idx < start) {
+ (*p_idx)++;
+ continue;
+ }
+ err = devlink_nl_sb_port_pool_fill(msg, devlink,
+ devlink_port,
+ devlink_sb,
+ pool_index,
+ DEVLINK_CMD_SB_PORT_POOL_NEW,
+ portid, seq,
+ NLM_F_MULTI);
+ if (err)
+ return err;
+ (*p_idx)++;
+ }
+ }
+ return 0;
+}
+
+static int
+devlink_nl_cmd_sb_port_pool_get_dump_one(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_sb *devlink_sb;
+ int idx = 0;
+ int err = 0;
+
+ if (!devlink->ops->sb_port_pool_get)
+ return 0;
+
+ list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
+ err = __sb_port_pool_get_dumpit(msg, state->idx, &idx,
+ devlink, devlink_sb,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq);
+ if (err == -EOPNOTSUPP) {
+ err = 0;
+ } else if (err) {
+ state->idx = idx;
+ break;
+ }
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_sb_port_pool_get = {
+ .dump_one = devlink_nl_cmd_sb_port_pool_get_dump_one,
+};
+
+static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
+ unsigned int sb_index, u16 pool_index,
+ u32 threshold,
+ struct netlink_ext_ack *extack)
+
+{
+ const struct devlink_ops *ops = devlink_port->devlink->ops;
+
+ if (ops->sb_port_pool_set)
+ return ops->sb_port_pool_set(devlink_port, sb_index,
+ pool_index, threshold, extack);
+ return -EOPNOTSUPP;
+}
+
+static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_sb *devlink_sb;
+ u16 pool_index;
+ u32 threshold;
+ int err;
+
+ devlink_sb = devlink_sb_get_from_info(devlink, info);
+ if (IS_ERR(devlink_sb))
+ return PTR_ERR(devlink_sb);
+
+ err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
+ &pool_index);
+ if (err)
+ return err;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SB_THRESHOLD))
+ return -EINVAL;
+
+ threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
+ return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
+ pool_index, threshold, info->extack);
+}
+
+static int
+devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
+ struct devlink_port *devlink_port,
+ struct devlink_sb *devlink_sb, u16 tc_index,
+ enum devlink_sb_pool_type pool_type,
+ enum devlink_command cmd,
+ u32 portid, u32 seq, int flags)
+{
+ const struct devlink_ops *ops = devlink->ops;
+ u16 pool_index;
+ u32 threshold;
+ void *hdr;
+ int err;
+
+ err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
+ tc_index, pool_type,
+ &pool_index, &threshold);
+ if (err)
+ return err;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
+ goto nla_put_failure;
+ if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
+ goto nla_put_failure;
+ if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
+ goto nla_put_failure;
+ if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
+ goto nla_put_failure;
+
+ if (ops->sb_occ_tc_port_bind_get) {
+ u32 cur;
+ u32 max;
+
+ err = ops->sb_occ_tc_port_bind_get(devlink_port,
+ devlink_sb->index,
+ tc_index, pool_type,
+ &cur, &max);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+ if (!err) {
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
+ goto nla_put_failure;
+ }
+ }
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct devlink *devlink = devlink_port->devlink;
+ struct devlink_sb *devlink_sb;
+ struct sk_buff *msg;
+ enum devlink_sb_pool_type pool_type;
+ u16 tc_index;
+ int err;
+
+ devlink_sb = devlink_sb_get_from_info(devlink, info);
+ if (IS_ERR(devlink_sb))
+ return PTR_ERR(devlink_sb);
+
+ err = devlink_sb_pool_type_get_from_info(info, &pool_type);
+ if (err)
+ return err;
+
+ err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
+ pool_type, &tc_index);
+ if (err)
+ return err;
+
+ if (!devlink->ops->sb_tc_pool_bind_get)
+ return -EOPNOTSUPP;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
+ devlink_sb, tc_index, pool_type,
+ DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
+ info->snd_portid,
+ info->snd_seq, 0);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
+ int start, int *p_idx,
+ struct devlink *devlink,
+ struct devlink_sb *devlink_sb,
+ u32 portid, u32 seq)
+{
+ struct devlink_port *devlink_port;
+ unsigned long port_index;
+ u16 tc_index;
+ int err;
+
+ xa_for_each(&devlink->ports, port_index, devlink_port) {
+ for (tc_index = 0;
+ tc_index < devlink_sb->ingress_tc_count; tc_index++) {
+ if (*p_idx < start) {
+ (*p_idx)++;
+ continue;
+ }
+ err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
+ devlink_port,
+ devlink_sb,
+ tc_index,
+ DEVLINK_SB_POOL_TYPE_INGRESS,
+ DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
+ portid, seq,
+ NLM_F_MULTI);
+ if (err)
+ return err;
+ (*p_idx)++;
+ }
+ for (tc_index = 0;
+ tc_index < devlink_sb->egress_tc_count; tc_index++) {
+ if (*p_idx < start) {
+ (*p_idx)++;
+ continue;
+ }
+ err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
+ devlink_port,
+ devlink_sb,
+ tc_index,
+ DEVLINK_SB_POOL_TYPE_EGRESS,
+ DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
+ portid, seq,
+ NLM_F_MULTI);
+ if (err)
+ return err;
+ (*p_idx)++;
+ }
+ }
+ return 0;
+}
+
+static int
+devlink_nl_cmd_sb_tc_pool_bind_get_dump_one(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_sb *devlink_sb;
+ int idx = 0;
+ int err = 0;
+
+ if (!devlink->ops->sb_tc_pool_bind_get)
+ return 0;
+
+ list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
+ err = __sb_tc_pool_bind_get_dumpit(msg, state->idx, &idx,
+ devlink, devlink_sb,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq);
+ if (err == -EOPNOTSUPP) {
+ err = 0;
+ } else if (err) {
+ state->idx = idx;
+ break;
+ }
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_sb_tc_pool_bind_get = {
+ .dump_one = devlink_nl_cmd_sb_tc_pool_bind_get_dump_one,
+};
+
+static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
+ unsigned int sb_index, u16 tc_index,
+ enum devlink_sb_pool_type pool_type,
+ u16 pool_index, u32 threshold,
+ struct netlink_ext_ack *extack)
+
+{
+ const struct devlink_ops *ops = devlink_port->devlink->ops;
+
+ if (ops->sb_tc_pool_bind_set)
+ return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
+ tc_index, pool_type,
+ pool_index, threshold, extack);
+ return -EOPNOTSUPP;
+}
+
+static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_port *devlink_port = info->user_ptr[1];
+ struct devlink *devlink = info->user_ptr[0];
+ enum devlink_sb_pool_type pool_type;
+ struct devlink_sb *devlink_sb;
+ u16 tc_index;
+ u16 pool_index;
+ u32 threshold;
+ int err;
+
+ devlink_sb = devlink_sb_get_from_info(devlink, info);
+ if (IS_ERR(devlink_sb))
+ return PTR_ERR(devlink_sb);
+
+ err = devlink_sb_pool_type_get_from_info(info, &pool_type);
+ if (err)
+ return err;
+
+ err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
+ pool_type, &tc_index);
+ if (err)
+ return err;
+
+ err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
+ &pool_index);
+ if (err)
+ return err;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SB_THRESHOLD))
+ return -EINVAL;
+
+ threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
+ return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
+ tc_index, pool_type,
+ pool_index, threshold, info->extack);
+}
+
+static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ const struct devlink_ops *ops = devlink->ops;
+ struct devlink_sb *devlink_sb;
+
+ devlink_sb = devlink_sb_get_from_info(devlink, info);
+ if (IS_ERR(devlink_sb))
+ return PTR_ERR(devlink_sb);
+
+ if (ops->sb_occ_snapshot)
+ return ops->sb_occ_snapshot(devlink, devlink_sb->index);
+ return -EOPNOTSUPP;
+}
+
+static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ const struct devlink_ops *ops = devlink->ops;
+ struct devlink_sb *devlink_sb;
+
+ devlink_sb = devlink_sb_get_from_info(devlink, info);
+ if (IS_ERR(devlink_sb))
+ return PTR_ERR(devlink_sb);
+
+ if (ops->sb_occ_max_clear)
+ return ops->sb_occ_max_clear(devlink, devlink_sb->index);
+ return -EOPNOTSUPP;
+}
+
+int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,
+ struct netlink_ext_ack *extack)
+{
+ struct devlink_rate *devlink_rate;
+
+ list_for_each_entry(devlink_rate, &devlink->rate_list, list)
+ if (devlink_rate_is_node(devlink_rate)) {
+ NL_SET_ERR_MSG_MOD(extack, "Rate node(s) exists.");
+ return -EBUSY;
+ }
+ return 0;
+}
+
+int devlink_dpipe_match_put(struct sk_buff *skb,
+ struct devlink_dpipe_match *match)
+{
+ struct devlink_dpipe_header *header = match->header;
+ struct devlink_dpipe_field *field = &header->fields[match->field_id];
+ struct nlattr *match_attr;
+
+ match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH);
+ if (!match_attr)
+ return -EMSGSIZE;
+
+ if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
+ nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
+ goto nla_put_failure;
+
+ nla_nest_end(skb, match_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(skb, match_attr);
+ return -EMSGSIZE;
+}
+EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
+
+static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
+ struct sk_buff *skb)
+{
+ struct nlattr *matches_attr;
+
+ matches_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
+ if (!matches_attr)
+ return -EMSGSIZE;
+
+ if (table->table_ops->matches_dump(table->priv, skb))
+ goto nla_put_failure;
+
+ nla_nest_end(skb, matches_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(skb, matches_attr);
+ return -EMSGSIZE;
+}
+
+int devlink_dpipe_action_put(struct sk_buff *skb,
+ struct devlink_dpipe_action *action)
+{
+ struct devlink_dpipe_header *header = action->header;
+ struct devlink_dpipe_field *field = &header->fields[action->field_id];
+ struct nlattr *action_attr;
+
+ action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION);
+ if (!action_attr)
+ return -EMSGSIZE;
+
+ if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
+ nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
+ goto nla_put_failure;
+
+ nla_nest_end(skb, action_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(skb, action_attr);
+ return -EMSGSIZE;
+}
+EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
+
+static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
+ struct sk_buff *skb)
+{
+ struct nlattr *actions_attr;
+
+ actions_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
+ if (!actions_attr)
+ return -EMSGSIZE;
+
+ if (table->table_ops->actions_dump(table->priv, skb))
+ goto nla_put_failure;
+
+ nla_nest_end(skb, actions_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(skb, actions_attr);
+ return -EMSGSIZE;
+}
+
+static int devlink_dpipe_table_put(struct sk_buff *skb,
+ struct devlink_dpipe_table *table)
+{
+ struct nlattr *table_attr;
+ u64 table_size;
+
+ table_size = table->table_ops->size_get(table->priv);
+ table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE);
+ if (!table_attr)
+ return -EMSGSIZE;
+
+ if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
+ nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
+ DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+ if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
+ table->counters_enabled))
+ goto nla_put_failure;
+
+ if (table->resource_valid) {
+ if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
+ table->resource_id, DEVLINK_ATTR_PAD) ||
+ nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
+ table->resource_units, DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+ }
+ if (devlink_dpipe_matches_put(table, skb))
+ goto nla_put_failure;
+
+ if (devlink_dpipe_actions_put(table, skb))
+ goto nla_put_failure;
+
+ nla_nest_end(skb, table_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(skb, table_attr);
+ return -EMSGSIZE;
+}
+
+static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
+ struct genl_info *info)
+{
+ int err;
+
+ if (*pskb) {
+ err = genlmsg_reply(*pskb, info);
+ if (err)
+ return err;
+ }
+ *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!*pskb)
+ return -ENOMEM;
+ return 0;
+}
+
+static int devlink_dpipe_tables_fill(struct genl_info *info,
+ enum devlink_command cmd, int flags,
+ struct list_head *dpipe_tables,
+ const char *table_name)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_dpipe_table *table;
+ struct nlattr *tables_attr;
+ struct sk_buff *skb = NULL;
+ struct nlmsghdr *nlh;
+ bool incomplete;
+ void *hdr;
+ int i;
+ int err;
+
+ table = list_first_entry(dpipe_tables,
+ struct devlink_dpipe_table, list);
+start_again:
+ err = devlink_dpipe_send_and_alloc_skb(&skb, info);
+ if (err)
+ return err;
+
+ hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
+ &devlink_nl_family, NLM_F_MULTI, cmd);
+ if (!hdr) {
+ nlmsg_free(skb);
+ return -EMSGSIZE;
+ }
+
+ if (devlink_nl_put_handle(skb, devlink))
+ goto nla_put_failure;
+ tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES);
+ if (!tables_attr)
+ goto nla_put_failure;
+
+ i = 0;
+ incomplete = false;
+ list_for_each_entry_from(table, dpipe_tables, list) {
+ if (!table_name) {
+ err = devlink_dpipe_table_put(skb, table);
+ if (err) {
+ if (!i)
+ goto err_table_put;
+ incomplete = true;
+ break;
+ }
+ } else {
+ if (!strcmp(table->name, table_name)) {
+ err = devlink_dpipe_table_put(skb, table);
+ if (err)
+ break;
+ }
+ }
+ i++;
+ }
+
+ nla_nest_end(skb, tables_attr);
+ genlmsg_end(skb, hdr);
+ if (incomplete)
+ goto start_again;
+
+send_done:
+ nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
+ NLMSG_DONE, 0, flags | NLM_F_MULTI);
+ if (!nlh) {
+ err = devlink_dpipe_send_and_alloc_skb(&skb, info);
+ if (err)
+ return err;
+ goto send_done;
+ }
+
+ return genlmsg_reply(skb, info);
+
+nla_put_failure:
+ err = -EMSGSIZE;
+err_table_put:
+ nlmsg_free(skb);
+ return err;
+}
+
+static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ const char *table_name = NULL;
+
+ if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
+ table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
+
+ return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
+ &devlink->dpipe_table_list,
+ table_name);
+}
+
+static int devlink_dpipe_value_put(struct sk_buff *skb,
+ struct devlink_dpipe_value *value)
+{
+ if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
+ value->value_size, value->value))
+ return -EMSGSIZE;
+ if (value->mask)
+ if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
+ value->value_size, value->mask))
+ return -EMSGSIZE;
+ if (value->mapping_valid)
+ if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
+ value->mapping_value))
+ return -EMSGSIZE;
+ return 0;
+}
+
+static int devlink_dpipe_action_value_put(struct sk_buff *skb,
+ struct devlink_dpipe_value *value)
+{
+ if (!value->action)
+ return -EINVAL;
+ if (devlink_dpipe_action_put(skb, value->action))
+ return -EMSGSIZE;
+ if (devlink_dpipe_value_put(skb, value))
+ return -EMSGSIZE;
+ return 0;
+}
+
+static int devlink_dpipe_action_values_put(struct sk_buff *skb,
+ struct devlink_dpipe_value *values,
+ unsigned int values_count)
+{
+ struct nlattr *action_attr;
+ int i;
+ int err;
+
+ for (i = 0; i < values_count; i++) {
+ action_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_DPIPE_ACTION_VALUE);
+ if (!action_attr)
+ return -EMSGSIZE;
+ err = devlink_dpipe_action_value_put(skb, &values[i]);
+ if (err)
+ goto err_action_value_put;
+ nla_nest_end(skb, action_attr);
+ }
+ return 0;
+
+err_action_value_put:
+ nla_nest_cancel(skb, action_attr);
+ return err;
+}
+
+static int devlink_dpipe_match_value_put(struct sk_buff *skb,
+ struct devlink_dpipe_value *value)
+{
+ if (!value->match)
+ return -EINVAL;
+ if (devlink_dpipe_match_put(skb, value->match))
+ return -EMSGSIZE;
+ if (devlink_dpipe_value_put(skb, value))
+ return -EMSGSIZE;
+ return 0;
+}
+
+static int devlink_dpipe_match_values_put(struct sk_buff *skb,
+ struct devlink_dpipe_value *values,
+ unsigned int values_count)
+{
+ struct nlattr *match_attr;
+ int i;
+ int err;
+
+ for (i = 0; i < values_count; i++) {
+ match_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_DPIPE_MATCH_VALUE);
+ if (!match_attr)
+ return -EMSGSIZE;
+ err = devlink_dpipe_match_value_put(skb, &values[i]);
+ if (err)
+ goto err_match_value_put;
+ nla_nest_end(skb, match_attr);
+ }
+ return 0;
+
+err_match_value_put:
+ nla_nest_cancel(skb, match_attr);
+ return err;
+}
+
+static int devlink_dpipe_entry_put(struct sk_buff *skb,
+ struct devlink_dpipe_entry *entry)
+{
+ struct nlattr *entry_attr, *matches_attr, *actions_attr;
+ int err;
+
+ entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY);
+ if (!entry_attr)
+ return -EMSGSIZE;
+
+ if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
+ DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+ if (entry->counter_valid)
+ if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
+ entry->counter, DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ matches_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
+ if (!matches_attr)
+ goto nla_put_failure;
+
+ err = devlink_dpipe_match_values_put(skb, entry->match_values,
+ entry->match_values_count);
+ if (err) {
+ nla_nest_cancel(skb, matches_attr);
+ goto err_match_values_put;
+ }
+ nla_nest_end(skb, matches_attr);
+
+ actions_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
+ if (!actions_attr)
+ goto nla_put_failure;
+
+ err = devlink_dpipe_action_values_put(skb, entry->action_values,
+ entry->action_values_count);
+ if (err) {
+ nla_nest_cancel(skb, actions_attr);
+ goto err_action_values_put;
+ }
+ nla_nest_end(skb, actions_attr);
+
+ nla_nest_end(skb, entry_attr);
+ return 0;
+
+nla_put_failure:
+ err = -EMSGSIZE;
+err_match_values_put:
+err_action_values_put:
+ nla_nest_cancel(skb, entry_attr);
+ return err;
+}
+
+static struct devlink_dpipe_table *
+devlink_dpipe_table_find(struct list_head *dpipe_tables,
+ const char *table_name, struct devlink *devlink)
+{
+ struct devlink_dpipe_table *table;
+ list_for_each_entry_rcu(table, dpipe_tables, list,
+ lockdep_is_held(&devlink->lock)) {
+ if (!strcmp(table->name, table_name))
+ return table;
+ }
+ return NULL;
+}
+
+int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
+{
+ struct devlink *devlink;
+ int err;
+
+ err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
+ dump_ctx->info);
+ if (err)
+ return err;
+
+ dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
+ dump_ctx->info->snd_portid,
+ dump_ctx->info->snd_seq,
+ &devlink_nl_family, NLM_F_MULTI,
+ dump_ctx->cmd);
+ if (!dump_ctx->hdr)
+ goto nla_put_failure;
+
+ devlink = dump_ctx->info->user_ptr[0];
+ if (devlink_nl_put_handle(dump_ctx->skb, devlink))
+ goto nla_put_failure;
+ dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
+ DEVLINK_ATTR_DPIPE_ENTRIES);
+ if (!dump_ctx->nest)
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ nlmsg_free(dump_ctx->skb);
+ return -EMSGSIZE;
+}
+EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
+
+int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
+ struct devlink_dpipe_entry *entry)
+{
+ return devlink_dpipe_entry_put(dump_ctx->skb, entry);
+}
+EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
+
+int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
+{
+ nla_nest_end(dump_ctx->skb, dump_ctx->nest);
+ genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
+
+void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
+
+{
+ unsigned int value_count, value_index;
+ struct devlink_dpipe_value *value;
+
+ value = entry->action_values;
+ value_count = entry->action_values_count;
+ for (value_index = 0; value_index < value_count; value_index++) {
+ kfree(value[value_index].value);
+ kfree(value[value_index].mask);
+ }
+
+ value = entry->match_values;
+ value_count = entry->match_values_count;
+ for (value_index = 0; value_index < value_count; value_index++) {
+ kfree(value[value_index].value);
+ kfree(value[value_index].mask);
+ }
+}
+EXPORT_SYMBOL_GPL(devlink_dpipe_entry_clear);
+
+static int devlink_dpipe_entries_fill(struct genl_info *info,
+ enum devlink_command cmd, int flags,
+ struct devlink_dpipe_table *table)
+{
+ struct devlink_dpipe_dump_ctx dump_ctx;
+ struct nlmsghdr *nlh;
+ int err;
+
+ dump_ctx.skb = NULL;
+ dump_ctx.cmd = cmd;
+ dump_ctx.info = info;
+
+ err = table->table_ops->entries_dump(table->priv,
+ table->counters_enabled,
+ &dump_ctx);
+ if (err)
+ return err;
+
+send_done:
+ nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
+ NLMSG_DONE, 0, flags | NLM_F_MULTI);
+ if (!nlh) {
+ err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
+ if (err)
+ return err;
+ goto send_done;
+ }
+ return genlmsg_reply(dump_ctx.skb, info);
+}
+
+static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_dpipe_table *table;
+ const char *table_name;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_DPIPE_TABLE_NAME))
+ return -EINVAL;
+
+ table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
+ table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
+ table_name, devlink);
+ if (!table)
+ return -EINVAL;
+
+ if (!table->table_ops->entries_dump)
+ return -EINVAL;
+
+ return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
+ 0, table);
+}
+
+static int devlink_dpipe_fields_put(struct sk_buff *skb,
+ const struct devlink_dpipe_header *header)
+{
+ struct devlink_dpipe_field *field;
+ struct nlattr *field_attr;
+ int i;
+
+ for (i = 0; i < header->fields_count; i++) {
+ field = &header->fields[i];
+ field_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_DPIPE_FIELD);
+ if (!field_attr)
+ return -EMSGSIZE;
+ if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
+ goto nla_put_failure;
+ nla_nest_end(skb, field_attr);
+ }
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(skb, field_attr);
+ return -EMSGSIZE;
+}
+
+static int devlink_dpipe_header_put(struct sk_buff *skb,
+ struct devlink_dpipe_header *header)
+{
+ struct nlattr *fields_attr, *header_attr;
+ int err;
+
+ header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
+ if (!header_attr)
+ return -EMSGSIZE;
+
+ if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
+ nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
+ nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
+ goto nla_put_failure;
+
+ fields_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
+ if (!fields_attr)
+ goto nla_put_failure;
+
+ err = devlink_dpipe_fields_put(skb, header);
+ if (err) {
+ nla_nest_cancel(skb, fields_attr);
+ goto nla_put_failure;
+ }
+ nla_nest_end(skb, fields_attr);
+ nla_nest_end(skb, header_attr);
+ return 0;
+
+nla_put_failure:
+ err = -EMSGSIZE;
+ nla_nest_cancel(skb, header_attr);
+ return err;
+}
+
+static int devlink_dpipe_headers_fill(struct genl_info *info,
+ enum devlink_command cmd, int flags,
+ struct devlink_dpipe_headers *
+ dpipe_headers)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct nlattr *headers_attr;
+ struct sk_buff *skb = NULL;
+ struct nlmsghdr *nlh;
+ void *hdr;
+ int i, j;
+ int err;
+
+ i = 0;
+start_again:
+ err = devlink_dpipe_send_and_alloc_skb(&skb, info);
+ if (err)
+ return err;
+
+ hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
+ &devlink_nl_family, NLM_F_MULTI, cmd);
+ if (!hdr) {
+ nlmsg_free(skb);
+ return -EMSGSIZE;
+ }
+
+ if (devlink_nl_put_handle(skb, devlink))
+ goto nla_put_failure;
+ headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
+ if (!headers_attr)
+ goto nla_put_failure;
+
+ j = 0;
+ for (; i < dpipe_headers->headers_count; i++) {
+ err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
+ if (err) {
+ if (!j)
+ goto err_table_put;
+ break;
+ }
+ j++;
+ }
+ nla_nest_end(skb, headers_attr);
+ genlmsg_end(skb, hdr);
+ if (i != dpipe_headers->headers_count)
+ goto start_again;
+
+send_done:
+ nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
+ NLMSG_DONE, 0, flags | NLM_F_MULTI);
+ if (!nlh) {
+ err = devlink_dpipe_send_and_alloc_skb(&skb, info);
+ if (err)
+ return err;
+ goto send_done;
+ }
+ return genlmsg_reply(skb, info);
+
+nla_put_failure:
+ err = -EMSGSIZE;
+err_table_put:
+ nlmsg_free(skb);
+ return err;
+}
+
+static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+
+ if (!devlink->dpipe_headers)
+ return -EOPNOTSUPP;
+ return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
+ 0, devlink->dpipe_headers);
+}
+
+static int devlink_dpipe_table_counters_set(struct devlink *devlink,
+ const char *table_name,
+ bool enable)
+{
+ struct devlink_dpipe_table *table;
+
+ table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
+ table_name, devlink);
+ if (!table)
+ return -EINVAL;
+
+ if (table->counter_control_extern)
+ return -EOPNOTSUPP;
+
+ if (!(table->counters_enabled ^ enable))
+ return 0;
+
+ table->counters_enabled = enable;
+ if (table->table_ops->counters_set_update)
+ table->table_ops->counters_set_update(table->priv, enable);
+ return 0;
+}
+
+static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ const char *table_name;
+ bool counters_enable;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_DPIPE_TABLE_NAME) ||
+ GENL_REQ_ATTR_CHECK(info,
+ DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED))
+ return -EINVAL;
+
+ table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
+ counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
+
+ return devlink_dpipe_table_counters_set(devlink, table_name,
+ counters_enable);
+}
+
+static struct devlink_resource *
+devlink_resource_find(struct devlink *devlink,
+ struct devlink_resource *resource, u64 resource_id)
+{
+ struct list_head *resource_list;
+
+ if (resource)
+ resource_list = &resource->resource_list;
+ else
+ resource_list = &devlink->resource_list;
+
+ list_for_each_entry(resource, resource_list, list) {
+ struct devlink_resource *child_resource;
+
+ if (resource->id == resource_id)
+ return resource;
+
+ child_resource = devlink_resource_find(devlink, resource,
+ resource_id);
+ if (child_resource)
+ return child_resource;
+ }
+ return NULL;
+}
+
+static void
+devlink_resource_validate_children(struct devlink_resource *resource)
+{
+ struct devlink_resource *child_resource;
+ bool size_valid = true;
+ u64 parts_size = 0;
+
+ if (list_empty(&resource->resource_list))
+ goto out;
+
+ list_for_each_entry(child_resource, &resource->resource_list, list)
+ parts_size += child_resource->size_new;
+
+ if (parts_size > resource->size_new)
+ size_valid = false;
+out:
+ resource->size_valid = size_valid;
+}
+
+static int
+devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
+ struct netlink_ext_ack *extack)
+{
+ u64 reminder;
+ int err = 0;
+
+ if (size > resource->size_params.size_max) {
+ NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
+ err = -EINVAL;
+ }
+
+ if (size < resource->size_params.size_min) {
+ NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
+ err = -EINVAL;
+ }
+
+ div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
+ if (reminder) {
+ NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_resource *resource;
+ u64 resource_id;
+ u64 size;
+ int err;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_RESOURCE_ID) ||
+ GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_RESOURCE_SIZE))
+ return -EINVAL;
+ resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
+
+ resource = devlink_resource_find(devlink, NULL, resource_id);
+ if (!resource)
+ return -EINVAL;
+
+ size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
+ err = devlink_resource_validate_size(resource, size, info->extack);
+ if (err)
+ return err;
+
+ resource->size_new = size;
+ devlink_resource_validate_children(resource);
+ if (resource->parent)
+ devlink_resource_validate_children(resource->parent);
+ return 0;
+}
+
+static int
+devlink_resource_size_params_put(struct devlink_resource *resource,
+ struct sk_buff *skb)
+{
+ struct devlink_resource_size_params *size_params;
+
+ size_params = &resource->size_params;
+ if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
+ size_params->size_granularity, DEVLINK_ATTR_PAD) ||
+ nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
+ size_params->size_max, DEVLINK_ATTR_PAD) ||
+ nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
+ size_params->size_min, DEVLINK_ATTR_PAD) ||
+ nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
+ return -EMSGSIZE;
+ return 0;
+}
+
+static int devlink_resource_occ_put(struct devlink_resource *resource,
+ struct sk_buff *skb)
+{
+ if (!resource->occ_get)
+ return 0;
+ return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
+ resource->occ_get(resource->occ_get_priv),
+ DEVLINK_ATTR_PAD);
+}
+
+static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
+ struct devlink_resource *resource)
+{
+ struct devlink_resource *child_resource;
+ struct nlattr *child_resource_attr;
+ struct nlattr *resource_attr;
+
+ resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
+ if (!resource_attr)
+ return -EMSGSIZE;
+
+ if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
+ nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
+ DEVLINK_ATTR_PAD) ||
+ nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
+ DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+ if (resource->size != resource->size_new &&
+ nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
+ resource->size_new, DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+ if (devlink_resource_occ_put(resource, skb))
+ goto nla_put_failure;
+ if (devlink_resource_size_params_put(resource, skb))
+ goto nla_put_failure;
+ if (list_empty(&resource->resource_list))
+ goto out;
+
+ if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
+ resource->size_valid))
+ goto nla_put_failure;
+
+ child_resource_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_RESOURCE_LIST);
+ if (!child_resource_attr)
+ goto nla_put_failure;
+
+ list_for_each_entry(child_resource, &resource->resource_list, list) {
+ if (devlink_resource_put(devlink, skb, child_resource))
+ goto resource_put_failure;
+ }
+
+ nla_nest_end(skb, child_resource_attr);
+out:
+ nla_nest_end(skb, resource_attr);
+ return 0;
+
+resource_put_failure:
+ nla_nest_cancel(skb, child_resource_attr);
+nla_put_failure:
+ nla_nest_cancel(skb, resource_attr);
+ return -EMSGSIZE;
+}
+
+static int devlink_resource_fill(struct genl_info *info,
+ enum devlink_command cmd, int flags)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_resource *resource;
+ struct nlattr *resources_attr;
+ struct sk_buff *skb = NULL;
+ struct nlmsghdr *nlh;
+ bool incomplete;
+ void *hdr;
+ int i;
+ int err;
+
+ resource = list_first_entry(&devlink->resource_list,
+ struct devlink_resource, list);
+start_again:
+ err = devlink_dpipe_send_and_alloc_skb(&skb, info);
+ if (err)
+ return err;
+
+ hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
+ &devlink_nl_family, NLM_F_MULTI, cmd);
+ if (!hdr) {
+ nlmsg_free(skb);
+ return -EMSGSIZE;
+ }
+
+ if (devlink_nl_put_handle(skb, devlink))
+ goto nla_put_failure;
+
+ resources_attr = nla_nest_start_noflag(skb,
+ DEVLINK_ATTR_RESOURCE_LIST);
+ if (!resources_attr)
+ goto nla_put_failure;
+
+ incomplete = false;
+ i = 0;
+ list_for_each_entry_from(resource, &devlink->resource_list, list) {
+ err = devlink_resource_put(devlink, skb, resource);
+ if (err) {
+ if (!i)
+ goto err_resource_put;
+ incomplete = true;
+ break;
+ }
+ i++;
+ }
+ nla_nest_end(skb, resources_attr);
+ genlmsg_end(skb, hdr);
+ if (incomplete)
+ goto start_again;
+send_done:
+ nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
+ NLMSG_DONE, 0, flags | NLM_F_MULTI);
+ if (!nlh) {
+ err = devlink_dpipe_send_and_alloc_skb(&skb, info);
+ if (err)
+ return err;
+ goto send_done;
+ }
+ return genlmsg_reply(skb, info);
+
+nla_put_failure:
+ err = -EMSGSIZE;
+err_resource_put:
+ nlmsg_free(skb);
+ return err;
+}
+
+static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+
+ if (list_empty(&devlink->resource_list))
+ return -EOPNOTSUPP;
+
+ return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
+}
+
+int devlink_resources_validate(struct devlink *devlink,
+ struct devlink_resource *resource,
+ struct genl_info *info)
+{
+ struct list_head *resource_list;
+ int err = 0;
+
+ if (resource)
+ resource_list = &resource->resource_list;
+ else
+ resource_list = &devlink->resource_list;
+
+ list_for_each_entry(resource, resource_list, list) {
+ if (!resource->size_valid)
+ return -EINVAL;
+ err = devlink_resources_validate(devlink, resource, info);
+ if (err)
+ return err;
+ }
+ return err;
+}
+
+static const struct devlink_param devlink_param_generic[] = {
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
+ .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
+ .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
+ .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
+ .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
+ .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
+ .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
+ .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
+ .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
+ .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
+ .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
+ .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
+ .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
+ .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
+ .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
+ .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
+ .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
+ .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
+ .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
+ .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME,
+ .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET,
+ .name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME,
+ .type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH,
+ .name = DEVLINK_PARAM_GENERIC_ENABLE_ETH_NAME,
+ .type = DEVLINK_PARAM_GENERIC_ENABLE_ETH_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,
+ .name = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_NAME,
+ .type = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,
+ .name = DEVLINK_PARAM_GENERIC_ENABLE_VNET_NAME,
+ .type = DEVLINK_PARAM_GENERIC_ENABLE_VNET_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_IWARP,
+ .name = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_NAME,
+ .type = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE,
+ .name = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_NAME,
+ .type = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_TYPE,
+ },
+ {
+ .id = DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE,
+ .name = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_NAME,
+ .type = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE,
+ },
+};
+
+static int devlink_param_generic_verify(const struct devlink_param *param)
+{
+ /* verify it match generic parameter by id and name */
+ if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
+ return -EINVAL;
+ if (strcmp(param->name, devlink_param_generic[param->id].name))
+ return -ENOENT;
+
+ WARN_ON(param->type != devlink_param_generic[param->id].type);
+
+ return 0;
+}
+
+static int devlink_param_driver_verify(const struct devlink_param *param)
+{
+ int i;
+
+ if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
+ return -EINVAL;
+ /* verify no such name in generic params */
+ for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
+ if (!strcmp(param->name, devlink_param_generic[i].name))
+ return -EEXIST;
+
+ return 0;
+}
+
+static struct devlink_param_item *
+devlink_param_find_by_name(struct list_head *param_list,
+ const char *param_name)
+{
+ struct devlink_param_item *param_item;
+
+ list_for_each_entry(param_item, param_list, list)
+ if (!strcmp(param_item->param->name, param_name))
+ return param_item;
+ return NULL;
+}
+
+static struct devlink_param_item *
+devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
+{
+ struct devlink_param_item *param_item;
+
+ list_for_each_entry(param_item, param_list, list)
+ if (param_item->param->id == param_id)
+ return param_item;
+ return NULL;
+}
+
+static bool
+devlink_param_cmode_is_supported(const struct devlink_param *param,
+ enum devlink_param_cmode cmode)
+{
+ return test_bit(cmode, ¶m->supported_cmodes);
+}
+
+static int devlink_param_get(struct devlink *devlink,
+ const struct devlink_param *param,
+ struct devlink_param_gset_ctx *ctx)
+{
+ if (!param->get || devlink->reload_failed)
+ return -EOPNOTSUPP;
+ return param->get(devlink, param->id, ctx);
+}
+
+static int devlink_param_set(struct devlink *devlink,
+ const struct devlink_param *param,
+ struct devlink_param_gset_ctx *ctx)
+{
+ if (!param->set || devlink->reload_failed)
+ return -EOPNOTSUPP;
+ return param->set(devlink, param->id, ctx);
+}
+
+static int
+devlink_param_type_to_nla_type(enum devlink_param_type param_type)
+{
+ switch (param_type) {
+ case DEVLINK_PARAM_TYPE_U8:
+ return NLA_U8;
+ case DEVLINK_PARAM_TYPE_U16:
+ return NLA_U16;
+ case DEVLINK_PARAM_TYPE_U32:
+ return NLA_U32;
+ case DEVLINK_PARAM_TYPE_STRING:
+ return NLA_STRING;
+ case DEVLINK_PARAM_TYPE_BOOL:
+ return NLA_FLAG;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int
+devlink_nl_param_value_fill_one(struct sk_buff *msg,
+ enum devlink_param_type type,
+ enum devlink_param_cmode cmode,
+ union devlink_param_value val)
+{
+ struct nlattr *param_value_attr;
+
+ param_value_attr = nla_nest_start_noflag(msg,
+ DEVLINK_ATTR_PARAM_VALUE);
+ if (!param_value_attr)
+ goto nla_put_failure;
+
+ if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
+ goto value_nest_cancel;
+
+ switch (type) {
+ case DEVLINK_PARAM_TYPE_U8:
+ if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
+ goto value_nest_cancel;
+ break;
+ case DEVLINK_PARAM_TYPE_U16:
+ if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
+ goto value_nest_cancel;
+ break;
+ case DEVLINK_PARAM_TYPE_U32:
+ if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
+ goto value_nest_cancel;
+ break;
+ case DEVLINK_PARAM_TYPE_STRING:
+ if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
+ val.vstr))
+ goto value_nest_cancel;
+ break;
+ case DEVLINK_PARAM_TYPE_BOOL:
+ if (val.vbool &&
+ nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
+ goto value_nest_cancel;
+ break;
+ }
+
+ nla_nest_end(msg, param_value_attr);
+ return 0;
+
+value_nest_cancel:
+ nla_nest_cancel(msg, param_value_attr);
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
+ unsigned int port_index,
+ struct devlink_param_item *param_item,
+ enum devlink_command cmd,
+ u32 portid, u32 seq, int flags)
+{
+ union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
+ bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
+ const struct devlink_param *param = param_item->param;
+ struct devlink_param_gset_ctx ctx;
+ struct nlattr *param_values_list;
+ struct nlattr *param_attr;
+ int nla_type;
+ void *hdr;
+ int err;
+ int i;
+
+ /* Get value from driver part to driverinit configuration mode */
+ for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
+ if (!devlink_param_cmode_is_supported(param, i))
+ continue;
+ if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
+ if (!param_item->driverinit_value_valid)
+ return -EOPNOTSUPP;
+ param_value[i] = param_item->driverinit_value;
+ } else {
+ ctx.cmode = i;
+ err = devlink_param_get(devlink, param, &ctx);
+ if (err)
+ return err;
+ param_value[i] = ctx.val;
+ }
+ param_value_set[i] = true;
+ }
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto genlmsg_cancel;
+
+ if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
+ cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
+ cmd == DEVLINK_CMD_PORT_PARAM_DEL)
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
+ goto genlmsg_cancel;
+
+ param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
+ if (!param_attr)
+ goto genlmsg_cancel;
+ if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
+ goto param_nest_cancel;
+ if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
+ goto param_nest_cancel;
+
+ nla_type = devlink_param_type_to_nla_type(param->type);
+ if (nla_type < 0)
+ goto param_nest_cancel;
+ if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
+ goto param_nest_cancel;
+
+ param_values_list = nla_nest_start_noflag(msg,
+ DEVLINK_ATTR_PARAM_VALUES_LIST);
+ if (!param_values_list)
+ goto param_nest_cancel;
+
+ for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
+ if (!param_value_set[i])
+ continue;
+ err = devlink_nl_param_value_fill_one(msg, param->type,
+ i, param_value[i]);
+ if (err)
+ goto values_list_nest_cancel;
+ }
+
+ nla_nest_end(msg, param_values_list);
+ nla_nest_end(msg, param_attr);
+ genlmsg_end(msg, hdr);
+ return 0;
+
+values_list_nest_cancel:
+ nla_nest_end(msg, param_values_list);
+param_nest_cancel:
+ nla_nest_cancel(msg, param_attr);
+genlmsg_cancel:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static void devlink_param_notify(struct devlink *devlink,
+ unsigned int port_index,
+ struct devlink_param_item *param_item,
+ enum devlink_command cmd)
+{
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
+ cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
+ cmd != DEVLINK_CMD_PORT_PARAM_DEL);
+
+ /* devlink_notify_register() / devlink_notify_unregister()
+ * will replay the notifications if the params are added/removed
+ * outside of the lifetime of the instance.
+ */
+ if (!devl_is_registered(devlink))
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+ err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
+ 0, 0, 0);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
+ msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static int
+devlink_nl_cmd_param_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_param_item *param_item;
+ int idx = 0;
+ int err = 0;
+
+ list_for_each_entry(param_item, &devlink->param_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_param_fill(msg, devlink, 0, param_item,
+ DEVLINK_CMD_PARAM_GET,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI);
+ if (err == -EOPNOTSUPP) {
+ err = 0;
+ } else if (err) {
+ state->idx = idx;
+ break;
+ }
+ idx++;
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_param_get = {
+ .dump_one = devlink_nl_cmd_param_get_dump_one,
+};
+
+static int
+devlink_param_type_get_from_info(struct genl_info *info,
+ enum devlink_param_type *param_type)
+{
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_TYPE))
+ return -EINVAL;
+
+ switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
+ case NLA_U8:
+ *param_type = DEVLINK_PARAM_TYPE_U8;
+ break;
+ case NLA_U16:
+ *param_type = DEVLINK_PARAM_TYPE_U16;
+ break;
+ case NLA_U32:
+ *param_type = DEVLINK_PARAM_TYPE_U32;
+ break;
+ case NLA_STRING:
+ *param_type = DEVLINK_PARAM_TYPE_STRING;
+ break;
+ case NLA_FLAG:
+ *param_type = DEVLINK_PARAM_TYPE_BOOL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int
+devlink_param_value_get_from_info(const struct devlink_param *param,
+ struct genl_info *info,
+ union devlink_param_value *value)
+{
+ struct nlattr *param_data;
+ int len;
+
+ param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA];
+
+ if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data)
+ return -EINVAL;
+
+ switch (param->type) {
+ case DEVLINK_PARAM_TYPE_U8:
+ if (nla_len(param_data) != sizeof(u8))
+ return -EINVAL;
+ value->vu8 = nla_get_u8(param_data);
+ break;
+ case DEVLINK_PARAM_TYPE_U16:
+ if (nla_len(param_data) != sizeof(u16))
+ return -EINVAL;
+ value->vu16 = nla_get_u16(param_data);
+ break;
+ case DEVLINK_PARAM_TYPE_U32:
+ if (nla_len(param_data) != sizeof(u32))
+ return -EINVAL;
+ value->vu32 = nla_get_u32(param_data);
+ break;
+ case DEVLINK_PARAM_TYPE_STRING:
+ len = strnlen(nla_data(param_data), nla_len(param_data));
+ if (len == nla_len(param_data) ||
+ len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
+ return -EINVAL;
+ strcpy(value->vstr, nla_data(param_data));
+ break;
+ case DEVLINK_PARAM_TYPE_BOOL:
+ if (param_data && nla_len(param_data))
+ return -EINVAL;
+ value->vbool = nla_get_flag(param_data);
+ break;
+ }
+ return 0;
+}
+
+static struct devlink_param_item *
+devlink_param_get_from_info(struct list_head *param_list,
+ struct genl_info *info)
+{
+ char *param_name;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_NAME))
+ return NULL;
+
+ param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
+ return devlink_param_find_by_name(param_list, param_name);
+}
+
+static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_param_item *param_item;
+ struct sk_buff *msg;
+ int err;
+
+ param_item = devlink_param_get_from_info(&devlink->param_list, info);
+ if (!param_item)
+ return -EINVAL;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_param_fill(msg, devlink, 0, param_item,
+ DEVLINK_CMD_PARAM_GET,
+ info->snd_portid, info->snd_seq, 0);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
+ unsigned int port_index,
+ struct list_head *param_list,
+ struct genl_info *info,
+ enum devlink_command cmd)
+{
+ enum devlink_param_type param_type;
+ struct devlink_param_gset_ctx ctx;
+ enum devlink_param_cmode cmode;
+ struct devlink_param_item *param_item;
+ const struct devlink_param *param;
+ union devlink_param_value value;
+ int err = 0;
+
+ param_item = devlink_param_get_from_info(param_list, info);
+ if (!param_item)
+ return -EINVAL;
+ param = param_item->param;
+ err = devlink_param_type_get_from_info(info, ¶m_type);
+ if (err)
+ return err;
+ if (param_type != param->type)
+ return -EINVAL;
+ err = devlink_param_value_get_from_info(param, info, &value);
+ if (err)
+ return err;
+ if (param->validate) {
+ err = param->validate(devlink, param->id, value, info->extack);
+ if (err)
+ return err;
+ }
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_VALUE_CMODE))
+ return -EINVAL;
+ cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
+ if (!devlink_param_cmode_is_supported(param, cmode))
+ return -EOPNOTSUPP;
+
+ if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
+ if (param->type == DEVLINK_PARAM_TYPE_STRING)
+ strcpy(param_item->driverinit_value.vstr, value.vstr);
+ else
+ param_item->driverinit_value = value;
+ param_item->driverinit_value_valid = true;
+ } else {
+ if (!param->set)
+ return -EOPNOTSUPP;
+ ctx.val = value;
+ ctx.cmode = cmode;
+ err = devlink_param_set(devlink, param, &ctx);
+ if (err)
+ return err;
+ }
+
+ devlink_param_notify(devlink, port_index, param_item, cmd);
+ return 0;
+}
+
+static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+
+ return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
+ info, DEVLINK_CMD_PARAM_NEW);
+}
+
+static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
+ struct netlink_callback *cb)
+{
+ NL_SET_ERR_MSG_MOD(cb->extack, "Port params are not supported");
+ return msg->len;
+}
+
+static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ NL_SET_ERR_MSG_MOD(info->extack, "Port params are not supported");
+ return -EINVAL;
+}
+
+static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ NL_SET_ERR_MSG_MOD(info->extack, "Port params are not supported");
+ return -EINVAL;
+}
+
+static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct devlink_snapshot *snapshot)
+{
+ struct nlattr *snap_attr;
+ int err;
+
+ snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
+ if (!snap_attr)
+ return -EINVAL;
+
+ err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
+ if (err)
+ goto nla_put_failure;
+
+ nla_nest_end(msg, snap_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, snap_attr);
+ return err;
+}
+
+static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct devlink_region *region)
+{
+ struct devlink_snapshot *snapshot;
+ struct nlattr *snapshots_attr;
+ int err;
+
+ snapshots_attr = nla_nest_start_noflag(msg,
+ DEVLINK_ATTR_REGION_SNAPSHOTS);
+ if (!snapshots_attr)
+ return -EINVAL;
+
+ list_for_each_entry(snapshot, ®ion->snapshot_list, list) {
+ err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
+ if (err)
+ goto nla_put_failure;
+ }
+
+ nla_nest_end(msg, snapshots_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, snapshots_attr);
+ return err;
+}
+
+static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
+ enum devlink_command cmd, u32 portid,
+ u32 seq, int flags,
+ struct devlink_region *region)
+{
+ void *hdr;
+ int err;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ err = devlink_nl_put_handle(msg, devlink);
+ if (err)
+ goto nla_put_failure;
+
+ if (region->port) {
+ err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
+ region->port->index);
+ if (err)
+ goto nla_put_failure;
+ }
+
+ err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name);
+ if (err)
+ goto nla_put_failure;
+
+ err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
+ region->size,
+ DEVLINK_ATTR_PAD);
+ if (err)
+ goto nla_put_failure;
+
+ err = nla_put_u32(msg, DEVLINK_ATTR_REGION_MAX_SNAPSHOTS,
+ region->max_snapshots);
+ if (err)
+ goto nla_put_failure;
+
+ err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
+ if (err)
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return err;
+}
+
+static struct sk_buff *
+devlink_nl_region_notify_build(struct devlink_region *region,
+ struct devlink_snapshot *snapshot,
+ enum devlink_command cmd, u32 portid, u32 seq)
+{
+ struct devlink *devlink = region->devlink;
+ struct sk_buff *msg;
+ void *hdr;
+ int err;
+
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return ERR_PTR(-ENOMEM);
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, 0, cmd);
+ if (!hdr) {
+ err = -EMSGSIZE;
+ goto out_free_msg;
+ }
+
+ err = devlink_nl_put_handle(msg, devlink);
+ if (err)
+ goto out_cancel_msg;
+
+ if (region->port) {
+ err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
+ region->port->index);
+ if (err)
+ goto out_cancel_msg;
+ }
+
+ err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
+ region->ops->name);
+ if (err)
+ goto out_cancel_msg;
+
+ if (snapshot) {
+ err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
+ snapshot->id);
+ if (err)
+ goto out_cancel_msg;
+ } else {
+ err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
+ region->size, DEVLINK_ATTR_PAD);
+ if (err)
+ goto out_cancel_msg;
+ }
+ genlmsg_end(msg, hdr);
+
+ return msg;
+
+out_cancel_msg:
+ genlmsg_cancel(msg, hdr);
+out_free_msg:
+ nlmsg_free(msg);
+ return ERR_PTR(err);
+}
+
+static void devlink_nl_region_notify(struct devlink_region *region,
+ struct devlink_snapshot *snapshot,
+ enum devlink_command cmd)
+{
+ struct devlink *devlink = region->devlink;
+ struct sk_buff *msg;
+
+ WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
+ if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
+ return;
+
+ msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0);
+ if (IS_ERR(msg))
+ return;
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
+ 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+/**
+ * __devlink_snapshot_id_increment - Increment number of snapshots using an id
+ * @devlink: devlink instance
+ * @id: the snapshot id
+ *
+ * Track when a new snapshot begins using an id. Load the count for the
+ * given id from the snapshot xarray, increment it, and store it back.
+ *
+ * Called when a new snapshot is created with the given id.
+ *
+ * The id *must* have been previously allocated by
+ * devlink_region_snapshot_id_get().
+ *
+ * Returns 0 on success, or an error on failure.
+ */
+static int __devlink_snapshot_id_increment(struct devlink *devlink, u32 id)
+{
+ unsigned long count;
+ void *p;
+ int err;
+
+ xa_lock(&devlink->snapshot_ids);
+ p = xa_load(&devlink->snapshot_ids, id);
+ if (WARN_ON(!p)) {
+ err = -EINVAL;
+ goto unlock;
+ }
+
+ if (WARN_ON(!xa_is_value(p))) {
+ err = -EINVAL;
+ goto unlock;
+ }
+
+ count = xa_to_value(p);
+ count++;
+
+ err = xa_err(__xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
+ GFP_ATOMIC));
+unlock:
+ xa_unlock(&devlink->snapshot_ids);
+ return err;
+}
+
+/**
+ * __devlink_snapshot_id_decrement - Decrease number of snapshots using an id
+ * @devlink: devlink instance
+ * @id: the snapshot id
+ *
+ * Track when a snapshot is deleted and stops using an id. Load the count
+ * for the given id from the snapshot xarray, decrement it, and store it
+ * back.
+ *
+ * If the count reaches zero, erase this id from the xarray, freeing it
+ * up for future re-use by devlink_region_snapshot_id_get().
+ *
+ * Called when a snapshot using the given id is deleted, and when the
+ * initial allocator of the id is finished using it.
+ */
+static void __devlink_snapshot_id_decrement(struct devlink *devlink, u32 id)
+{
+ unsigned long count;
+ void *p;
+
+ xa_lock(&devlink->snapshot_ids);
+ p = xa_load(&devlink->snapshot_ids, id);
+ if (WARN_ON(!p))
+ goto unlock;
+
+ if (WARN_ON(!xa_is_value(p)))
+ goto unlock;
+
+ count = xa_to_value(p);
+
+ if (count > 1) {
+ count--;
+ __xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
+ GFP_ATOMIC);
+ } else {
+ /* If this was the last user, we can erase this id */
+ __xa_erase(&devlink->snapshot_ids, id);
+ }
+unlock:
+ xa_unlock(&devlink->snapshot_ids);
+}
+
+/**
+ * __devlink_snapshot_id_insert - Insert a specific snapshot ID
+ * @devlink: devlink instance
+ * @id: the snapshot id
+ *
+ * Mark the given snapshot id as used by inserting a zero value into the
+ * snapshot xarray.
+ *
+ * This must be called while holding the devlink instance lock. Unlike
+ * devlink_snapshot_id_get, the initial reference count is zero, not one.
+ * It is expected that the id will immediately be used before
+ * releasing the devlink instance lock.
+ *
+ * Returns zero on success, or an error code if the snapshot id could not
+ * be inserted.
+ */
+static int __devlink_snapshot_id_insert(struct devlink *devlink, u32 id)
+{
+ int err;
+
+ xa_lock(&devlink->snapshot_ids);
+ if (xa_load(&devlink->snapshot_ids, id)) {
+ xa_unlock(&devlink->snapshot_ids);
+ return -EEXIST;
+ }
+ err = xa_err(__xa_store(&devlink->snapshot_ids, id, xa_mk_value(0),
+ GFP_ATOMIC));
+ xa_unlock(&devlink->snapshot_ids);
+ return err;
+}
+
+/**
+ * __devlink_region_snapshot_id_get - get snapshot ID
+ * @devlink: devlink instance
+ * @id: storage to return snapshot id
+ *
+ * Allocates a new snapshot id. Returns zero on success, or a negative
+ * error on failure. Must be called while holding the devlink instance
+ * lock.
+ *
+ * Snapshot IDs are tracked using an xarray which stores the number of
+ * users of the snapshot id.
+ *
+ * Note that the caller of this function counts as a 'user', in order to
+ * avoid race conditions. The caller must release its hold on the
+ * snapshot by using devlink_region_snapshot_id_put.
+ */
+static int __devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
+{
+ return xa_alloc(&devlink->snapshot_ids, id, xa_mk_value(1),
+ xa_limit_32b, GFP_KERNEL);
+}
+
+/**
+ * __devlink_region_snapshot_create - create a new snapshot
+ * This will add a new snapshot of a region. The snapshot
+ * will be stored on the region struct and can be accessed
+ * from devlink. This is useful for future analyses of snapshots.
+ * Multiple snapshots can be created on a region.
+ * The @snapshot_id should be obtained using the getter function.
+ *
+ * Must be called only while holding the region snapshot lock.
+ *
+ * @region: devlink region of the snapshot
+ * @data: snapshot data
+ * @snapshot_id: snapshot id to be created
+ */
+static int
+__devlink_region_snapshot_create(struct devlink_region *region,
+ u8 *data, u32 snapshot_id)
+{
+ struct devlink *devlink = region->devlink;
+ struct devlink_snapshot *snapshot;
+ int err;
+
+ lockdep_assert_held(®ion->snapshot_lock);
+
+ /* check if region can hold one more snapshot */
+ if (region->cur_snapshots == region->max_snapshots)
+ return -ENOSPC;
+
+ if (devlink_region_snapshot_get_by_id(region, snapshot_id))
+ return -EEXIST;
+
+ snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
+ if (!snapshot)
+ return -ENOMEM;
+
+ err = __devlink_snapshot_id_increment(devlink, snapshot_id);
+ if (err)
+ goto err_snapshot_id_increment;
+
+ snapshot->id = snapshot_id;
+ snapshot->region = region;
+ snapshot->data = data;
+
+ list_add_tail(&snapshot->list, ®ion->snapshot_list);
+
+ region->cur_snapshots++;
+
+ devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
+ return 0;
+
+err_snapshot_id_increment:
+ kfree(snapshot);
+ return err;
+}
+
+static void devlink_region_snapshot_del(struct devlink_region *region,
+ struct devlink_snapshot *snapshot)
+{
+ struct devlink *devlink = region->devlink;
+
+ lockdep_assert_held(®ion->snapshot_lock);
+
+ devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
+ region->cur_snapshots--;
+ list_del(&snapshot->list);
+ region->ops->destructor(snapshot->data);
+ __devlink_snapshot_id_decrement(devlink, snapshot->id);
+ kfree(snapshot);
+}
+
+static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_port *port = NULL;
+ struct devlink_region *region;
+ const char *region_name;
+ struct sk_buff *msg;
+ unsigned int index;
+ int err;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_REGION_NAME))
+ return -EINVAL;
+
+ if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
+ index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
+
+ port = devlink_port_get_by_index(devlink, index);
+ if (!port)
+ return -ENODEV;
+ }
+
+ region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
+ if (port)
+ region = devlink_port_region_get_by_name(port, region_name);
+ else
+ region = devlink_region_get_by_name(devlink, region_name);
+
+ if (!region)
+ return -EINVAL;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
+ info->snd_portid, info->snd_seq, 0,
+ region);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int devlink_nl_cmd_region_get_port_dumpit(struct sk_buff *msg,
+ struct netlink_callback *cb,
+ struct devlink_port *port,
+ int *idx,
+ int start)
+{
+ struct devlink_region *region;
+ int err = 0;
+
+ list_for_each_entry(region, &port->region_list, list) {
+ if (*idx < start) {
+ (*idx)++;
+ continue;
+ }
+ err = devlink_nl_region_fill(msg, port->devlink,
+ DEVLINK_CMD_REGION_GET,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI, region);
+ if (err)
+ goto out;
+ (*idx)++;
+ }
+
+out:
+ return err;
+}
+
+static int
+devlink_nl_cmd_region_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_region *region;
+ struct devlink_port *port;
+ unsigned long port_index;
+ int idx = 0;
+ int err;
+
+ list_for_each_entry(region, &devlink->region_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_region_fill(msg, devlink,
+ DEVLINK_CMD_REGION_GET,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI, region);
+ if (err) {
+ state->idx = idx;
+ return err;
+ }
+ idx++;
+ }
+
+ xa_for_each(&devlink->ports, port_index, port) {
+ err = devlink_nl_cmd_region_get_port_dumpit(msg, cb, port, &idx,
+ state->idx);
+ if (err) {
+ state->idx = idx;
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+const struct devlink_cmd devl_cmd_region_get = {
+ .dump_one = devlink_nl_cmd_region_get_dump_one,
+};
+
+static int devlink_nl_cmd_region_del(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_snapshot *snapshot;
+ struct devlink_port *port = NULL;
+ struct devlink_region *region;
+ const char *region_name;
+ unsigned int index;
+ u32 snapshot_id;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_REGION_NAME) ||
+ GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_REGION_SNAPSHOT_ID))
+ return -EINVAL;
+
+ region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
+ snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
+
+ if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
+ index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
+
+ port = devlink_port_get_by_index(devlink, index);
+ if (!port)
+ return -ENODEV;
+ }
+
+ if (port)
+ region = devlink_port_region_get_by_name(port, region_name);
+ else
+ region = devlink_region_get_by_name(devlink, region_name);
+
+ if (!region)
+ return -EINVAL;
+
+ mutex_lock(®ion->snapshot_lock);
+ snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
+ if (!snapshot) {
+ mutex_unlock(®ion->snapshot_lock);
+ return -EINVAL;
+ }
+
+ devlink_region_snapshot_del(region, snapshot);
+ mutex_unlock(®ion->snapshot_lock);
+ return 0;
+}
+
+static int
+devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_snapshot *snapshot;
+ struct devlink_port *port = NULL;
+ struct nlattr *snapshot_id_attr;
+ struct devlink_region *region;
+ const char *region_name;
+ unsigned int index;
+ u32 snapshot_id;
+ u8 *data;
+ int err;
+
+ if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_REGION_NAME)) {
+ NL_SET_ERR_MSG_MOD(info->extack, "No region name provided");
+ return -EINVAL;
+ }
+
+ region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
+
+ if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
+ index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
+
+ port = devlink_port_get_by_index(devlink, index);
+ if (!port)
+ return -ENODEV;
+ }
+
+ if (port)
+ region = devlink_port_region_get_by_name(port, region_name);
+ else
+ region = devlink_region_get_by_name(devlink, region_name);
+
+ if (!region) {
+ NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not exist");
+ return -EINVAL;
+ }
+
+ if (!region->ops->snapshot) {
+ NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not support taking an immediate snapshot");
+ return -EOPNOTSUPP;
+ }
+
+ mutex_lock(®ion->snapshot_lock);
+
+ if (region->cur_snapshots == region->max_snapshots) {
+ NL_SET_ERR_MSG_MOD(info->extack, "The region has reached the maximum number of stored snapshots");
+ err = -ENOSPC;
+ goto unlock;
+ }
+
+ snapshot_id_attr = info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID];
+ if (snapshot_id_attr) {
+ snapshot_id = nla_get_u32(snapshot_id_attr);
+
+ if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
+ NL_SET_ERR_MSG_MOD(info->extack, "The requested snapshot id is already in use");
+ err = -EEXIST;
+ goto unlock;
+ }
+
+ err = __devlink_snapshot_id_insert(devlink, snapshot_id);
+ if (err)
+ goto unlock;
+ } else {
+ err = __devlink_region_snapshot_id_get(devlink, &snapshot_id);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Failed to allocate a new snapshot id");
+ goto unlock;
+ }
+ }
+
+ if (port)
+ err = region->port_ops->snapshot(port, region->port_ops,
+ info->extack, &data);
+ else
+ err = region->ops->snapshot(devlink, region->ops,
+ info->extack, &data);
+ if (err)
+ goto err_snapshot_capture;
+
+ err = __devlink_region_snapshot_create(region, data, snapshot_id);
+ if (err)
+ goto err_snapshot_create;
+
+ if (!snapshot_id_attr) {
+ struct sk_buff *msg;
+
+ snapshot = devlink_region_snapshot_get_by_id(region,
+ snapshot_id);
+ if (WARN_ON(!snapshot)) {
+ err = -EINVAL;
+ goto unlock;
+ }
+
+ msg = devlink_nl_region_notify_build(region, snapshot,
+ DEVLINK_CMD_REGION_NEW,
+ info->snd_portid,
+ info->snd_seq);
+ err = PTR_ERR_OR_ZERO(msg);
+ if (err)
+ goto err_notify;
+
+ err = genlmsg_reply(msg, info);
+ if (err)
+ goto err_notify;
+ }
+
+ mutex_unlock(®ion->snapshot_lock);
+ return 0;
+
+err_snapshot_create:
+ region->ops->destructor(data);
+err_snapshot_capture:
+ __devlink_snapshot_id_decrement(devlink, snapshot_id);
+ mutex_unlock(®ion->snapshot_lock);
+ return err;
+
+err_notify:
+ devlink_region_snapshot_del(region, snapshot);
+unlock:
+ mutex_unlock(®ion->snapshot_lock);
+ return err;
+}
+
+static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
+ u8 *chunk, u32 chunk_size,
+ u64 addr)
+{
+ struct nlattr *chunk_attr;
+ int err;
+
+ chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
+ if (!chunk_attr)
+ return -EINVAL;
+
+ err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
+ if (err)
+ goto nla_put_failure;
+
+ err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
+ DEVLINK_ATTR_PAD);
+ if (err)
+ goto nla_put_failure;
+
+ nla_nest_end(msg, chunk_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, chunk_attr);
+ return err;
+}
+
+#define DEVLINK_REGION_READ_CHUNK_SIZE 256
+
+typedef int devlink_chunk_fill_t(void *cb_priv, u8 *chunk, u32 chunk_size,
+ u64 curr_offset,
+ struct netlink_ext_ack *extack);
+
+static int
+devlink_nl_region_read_fill(struct sk_buff *skb, devlink_chunk_fill_t *cb,
+ void *cb_priv, u64 start_offset, u64 end_offset,
+ u64 *new_offset, struct netlink_ext_ack *extack)
+{
+ u64 curr_offset = start_offset;
+ int err = 0;
+ u8 *data;
+
+ /* Allocate and re-use a single buffer */
+ data = kmalloc(DEVLINK_REGION_READ_CHUNK_SIZE, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ *new_offset = start_offset;
+
+ while (curr_offset < end_offset) {
+ u32 data_size;
+
+ data_size = min_t(u32, end_offset - curr_offset,
+ DEVLINK_REGION_READ_CHUNK_SIZE);
+
+ err = cb(cb_priv, data, data_size, curr_offset, extack);
+ if (err)
+ break;
+
+ err = devlink_nl_cmd_region_read_chunk_fill(skb, data, data_size, curr_offset);
+ if (err)
+ break;
+
+ curr_offset += data_size;
+ }
+ *new_offset = curr_offset;
+
+ kfree(data);
+
+ return err;
+}
+
+static int
+devlink_region_snapshot_fill(void *cb_priv, u8 *chunk, u32 chunk_size,
+ u64 curr_offset,
+ struct netlink_ext_ack __always_unused *extack)
+{
+ struct devlink_snapshot *snapshot = cb_priv;
+
+ memcpy(chunk, &snapshot->data[curr_offset], chunk_size);
+
+ return 0;
+}
+
+static int
+devlink_region_port_direct_fill(void *cb_priv, u8 *chunk, u32 chunk_size,
+ u64 curr_offset, struct netlink_ext_ack *extack)
+{
+ struct devlink_region *region = cb_priv;
+
+ return region->port_ops->read(region->port, region->port_ops, extack,
+ curr_offset, chunk_size, chunk);
+}
+
+static int
+devlink_region_direct_fill(void *cb_priv, u8 *chunk, u32 chunk_size,
+ u64 curr_offset, struct netlink_ext_ack *extack)
+{
+ struct devlink_region *region = cb_priv;
+
+ return region->ops->read(region->devlink, region->ops, extack,
+ curr_offset, chunk_size, chunk);
+}
+
+static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ const struct genl_dumpit_info *info = genl_dumpit_info(cb);
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct nlattr *chunks_attr, *region_attr, *snapshot_attr;
+ u64 ret_offset, start_offset, end_offset = U64_MAX;
+ struct nlattr **attrs = info->attrs;
+ struct devlink_port *port = NULL;
+ devlink_chunk_fill_t *region_cb;
+ struct devlink_region *region;
+ const char *region_name;
+ struct devlink *devlink;
+ unsigned int index;
+ void *region_cb_priv;
+ void *hdr;
+ int err;
+
+ start_offset = state->start_offset;
+
+ devlink = devlink_get_from_attrs_lock(sock_net(cb->skb->sk), attrs);
+ if (IS_ERR(devlink))
+ return PTR_ERR(devlink);
+
+ if (!attrs[DEVLINK_ATTR_REGION_NAME]) {
+ NL_SET_ERR_MSG(cb->extack, "No region name provided");
+ err = -EINVAL;
+ goto out_unlock;
+ }
+
+ if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
+ index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
+
+ port = devlink_port_get_by_index(devlink, index);
+ if (!port) {
+ err = -ENODEV;
+ goto out_unlock;
+ }
+ }
+
+ region_attr = attrs[DEVLINK_ATTR_REGION_NAME];
+ region_name = nla_data(region_attr);
+
+ if (port)
+ region = devlink_port_region_get_by_name(port, region_name);
+ else
+ region = devlink_region_get_by_name(devlink, region_name);
+
+ if (!region) {
+ NL_SET_ERR_MSG_ATTR(cb->extack, region_attr, "Requested region does not exist");
+ err = -EINVAL;
+ goto out_unlock;
+ }
+
+ snapshot_attr = attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID];
+ if (!snapshot_attr) {
+ if (!nla_get_flag(attrs[DEVLINK_ATTR_REGION_DIRECT])) {
+ NL_SET_ERR_MSG(cb->extack, "No snapshot id provided");
+ err = -EINVAL;
+ goto out_unlock;
+ }
+
+ if (!region->ops->read) {
+ NL_SET_ERR_MSG(cb->extack, "Requested region does not support direct read");
+ err = -EOPNOTSUPP;
+ goto out_unlock;
+ }
+
+ if (port)
+ region_cb = &devlink_region_port_direct_fill;
+ else
+ region_cb = &devlink_region_direct_fill;
+ region_cb_priv = region;
+ } else {
+ struct devlink_snapshot *snapshot;
+ u32 snapshot_id;
+
+ if (nla_get_flag(attrs[DEVLINK_ATTR_REGION_DIRECT])) {
+ NL_SET_ERR_MSG_ATTR(cb->extack, snapshot_attr, "Direct region read does not use snapshot");
+ err = -EINVAL;
+ goto out_unlock;
+ }
+
+ snapshot_id = nla_get_u32(snapshot_attr);
+ snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
+ if (!snapshot) {
+ NL_SET_ERR_MSG_ATTR(cb->extack, snapshot_attr, "Requested snapshot does not exist");
+ err = -EINVAL;
+ goto out_unlock;
+ }
+ region_cb = &devlink_region_snapshot_fill;
+ region_cb_priv = snapshot;
+ }
+
+ if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
+ attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
+ if (!start_offset)
+ start_offset =
+ nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
+
+ end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
+ end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
+ }
+
+ if (end_offset > region->size)
+ end_offset = region->size;
+
+ /* return 0 if there is no further data to read */
+ if (start_offset == end_offset) {
+ err = 0;
+ goto out_unlock;
+ }
+
+ hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
+ DEVLINK_CMD_REGION_READ);
+ if (!hdr) {
+ err = -EMSGSIZE;
+ goto out_unlock;
+ }
+
+ err = devlink_nl_put_handle(skb, devlink);
+ if (err)
+ goto nla_put_failure;
+
+ if (region->port) {
+ err = nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX,
+ region->port->index);
+ if (err)
+ goto nla_put_failure;
+ }
+
+ err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
+ if (err)
+ goto nla_put_failure;
+
+ chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
+ if (!chunks_attr) {
+ err = -EMSGSIZE;
+ goto nla_put_failure;
+ }
+
+ err = devlink_nl_region_read_fill(skb, region_cb, region_cb_priv,
+ start_offset, end_offset, &ret_offset,
+ cb->extack);
+
+ if (err && err != -EMSGSIZE)
+ goto nla_put_failure;
+
+ /* Check if there was any progress done to prevent infinite loop */
+ if (ret_offset == start_offset) {
+ err = -EINVAL;
+ goto nla_put_failure;
+ }
+
+ state->start_offset = ret_offset;
+
+ nla_nest_end(skb, chunks_attr);
+ genlmsg_end(skb, hdr);
+ devl_unlock(devlink);
+ devlink_put(devlink);
+ return skb->len;
+
+nla_put_failure:
+ genlmsg_cancel(skb, hdr);
+out_unlock:
+ devl_unlock(devlink);
+ devlink_put(devlink);
+ return err;
+}
+
+struct devlink_fmsg_item {
+ struct list_head list;
+ int attrtype;
+ u8 nla_type;
+ u16 len;
+ int value[];
+};
+
+struct devlink_fmsg {
+ struct list_head item_list;
+ bool putting_binary; /* This flag forces enclosing of binary data
+ * in an array brackets. It forces using
+ * of designated API:
+ * devlink_fmsg_binary_pair_nest_start()
+ * devlink_fmsg_binary_pair_nest_end()
+ */
+};
+
+static struct devlink_fmsg *devlink_fmsg_alloc(void)
+{
+ struct devlink_fmsg *fmsg;
+
+ fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
+ if (!fmsg)
+ return NULL;
+
+ INIT_LIST_HEAD(&fmsg->item_list);
+
+ return fmsg;
+}
+
+static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
+{
+ struct devlink_fmsg_item *item, *tmp;
+
+ list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
+ list_del(&item->list);
+ kfree(item);
+ }
+ kfree(fmsg);
+}
+
+static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
+ int attrtype)
+{
+ struct devlink_fmsg_item *item;
+
+ item = kzalloc(sizeof(*item), GFP_KERNEL);
+ if (!item)
+ return -ENOMEM;
+
+ item->attrtype = attrtype;
+ list_add_tail(&item->list, &fmsg->item_list);
+
+ return 0;
+}
+
+int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
+{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
+
+static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
+{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
+}
+
+int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
+{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_nest_end(fmsg);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
+
+#define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
+
+static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
+{
+ struct devlink_fmsg_item *item;
+
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
+ return -EMSGSIZE;
+
+ item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
+ if (!item)
+ return -ENOMEM;
+
+ item->nla_type = NLA_NUL_STRING;
+ item->len = strlen(name) + 1;
+ item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
+ memcpy(&item->value, name, item->len);
+ list_add_tail(&item->list, &fmsg->item_list);
+
+ return 0;
+}
+
+int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
+{
+ int err;
+
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_put_name(fmsg, name);
+ if (err)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
+
+int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
+{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_nest_end(fmsg);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
+
+int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
+ const char *name)
+{
+ int err;
+
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ err = devlink_fmsg_pair_nest_start(fmsg, name);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
+ if (err)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
+
+int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
+{
+ int err;
+
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ err = devlink_fmsg_nest_end(fmsg);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_nest_end(fmsg);
+ if (err)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
+
+int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
+ const char *name)
+{
+ int err;
+
+ err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
+ if (err)
+ return err;
+
+ fmsg->putting_binary = true;
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
+
+int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
+{
+ if (!fmsg->putting_binary)
+ return -EINVAL;
+
+ fmsg->putting_binary = false;
+ return devlink_fmsg_arr_pair_nest_end(fmsg);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
+
+static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
+ const void *value, u16 value_len,
+ u8 value_nla_type)
+{
+ struct devlink_fmsg_item *item;
+
+ if (value_len > DEVLINK_FMSG_MAX_SIZE)
+ return -EMSGSIZE;
+
+ item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
+ if (!item)
+ return -ENOMEM;
+
+ item->nla_type = value_nla_type;
+ item->len = value_len;
+ item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
+ memcpy(&item->value, value, item->len);
+ list_add_tail(&item->list, &fmsg->item_list);
+
+ return 0;
+}
+
+static int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
+{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
+}
+
+static int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
+{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
+}
+
+int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
+{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
+
+static int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
+{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
+}
+
+int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
+{
+ if (fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
+ NLA_NUL_STRING);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
+
+int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
+ u16 value_len)
+{
+ if (!fmsg->putting_binary)
+ return -EINVAL;
+
+ return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
+
+int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
+ bool value)
+{
+ int err;
+
+ err = devlink_fmsg_pair_nest_start(fmsg, name);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_bool_put(fmsg, value);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_pair_nest_end(fmsg);
+ if (err)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
+
+int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
+ u8 value)
+{
+ int err;
+
+ err = devlink_fmsg_pair_nest_start(fmsg, name);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_u8_put(fmsg, value);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_pair_nest_end(fmsg);
+ if (err)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
+
+int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
+ u32 value)
+{
+ int err;
+
+ err = devlink_fmsg_pair_nest_start(fmsg, name);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_u32_put(fmsg, value);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_pair_nest_end(fmsg);
+ if (err)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
+
+int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
+ u64 value)
+{
+ int err;
+
+ err = devlink_fmsg_pair_nest_start(fmsg, name);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_u64_put(fmsg, value);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_pair_nest_end(fmsg);
+ if (err)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
+
+int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
+ const char *value)
+{
+ int err;
+
+ err = devlink_fmsg_pair_nest_start(fmsg, name);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_string_put(fmsg, value);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_pair_nest_end(fmsg);
+ if (err)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
+
+int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
+ const void *value, u32 value_len)
+{
+ u32 data_size;
+ int end_err;
+ u32 offset;
+ int err;
+
+ err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
+ if (err)
+ return err;
+
+ for (offset = 0; offset < value_len; offset += data_size) {
+ data_size = value_len - offset;
+ if (data_size > DEVLINK_FMSG_MAX_SIZE)
+ data_size = DEVLINK_FMSG_MAX_SIZE;
+ err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
+ if (err)
+ break;
+ /* Exit from loop with a break (instead of
+ * return) to make sure putting_binary is turned off in
+ * devlink_fmsg_binary_pair_nest_end
+ */
+ }
+
+ end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
+ if (end_err)
+ err = end_err;
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
+
+static int
+devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
+{
+ switch (msg->nla_type) {
+ case NLA_FLAG:
+ case NLA_U8:
+ case NLA_U32:
+ case NLA_U64:
+ case NLA_NUL_STRING:
+ case NLA_BINARY:
+ return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
+ msg->nla_type);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int
+devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
+{
+ int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
+ u8 tmp;
+
+ switch (msg->nla_type) {
+ case NLA_FLAG:
+ /* Always provide flag data, regardless of its value */
+ tmp = *(bool *) msg->value;
+
+ return nla_put_u8(skb, attrtype, tmp);
+ case NLA_U8:
+ return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
+ case NLA_U32:
+ return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
+ case NLA_U64:
+ return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
+ DEVLINK_ATTR_PAD);
+ case NLA_NUL_STRING:
+ return nla_put_string(skb, attrtype, (char *) &msg->value);
+ case NLA_BINARY:
+ return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int
+devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
+ int *start)
+{
+ struct devlink_fmsg_item *item;
+ struct nlattr *fmsg_nlattr;
+ int err = 0;
+ int i = 0;
+
+ fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
+ if (!fmsg_nlattr)
+ return -EMSGSIZE;
+
+ list_for_each_entry(item, &fmsg->item_list, list) {
+ if (i < *start) {
+ i++;
+ continue;
+ }
+
+ switch (item->attrtype) {
+ case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
+ case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
+ case DEVLINK_ATTR_FMSG_ARR_NEST_START:
+ case DEVLINK_ATTR_FMSG_NEST_END:
+ err = nla_put_flag(skb, item->attrtype);
+ break;
+ case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
+ err = devlink_fmsg_item_fill_type(item, skb);
+ if (err)
+ break;
+ err = devlink_fmsg_item_fill_data(item, skb);
+ break;
+ case DEVLINK_ATTR_FMSG_OBJ_NAME:
+ err = nla_put_string(skb, item->attrtype,
+ (char *) &item->value);
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+ if (!err)
+ *start = ++i;
+ else
+ break;
+ }
+
+ nla_nest_end(skb, fmsg_nlattr);
+ return err;
+}
+
+static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
+ struct genl_info *info,
+ enum devlink_command cmd, int flags)
+{
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+ bool last = false;
+ int index = 0;
+ void *hdr;
+ int err;
+
+ while (!last) {
+ int tmp_index = index;
+
+ skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
+ &devlink_nl_family, flags | NLM_F_MULTI, cmd);
+ if (!hdr) {
+ err = -EMSGSIZE;
+ goto nla_put_failure;
+ }
+
+ err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
+ if (!err)
+ last = true;
+ else if (err != -EMSGSIZE || tmp_index == index)
+ goto nla_put_failure;
+
+ genlmsg_end(skb, hdr);
+ err = genlmsg_reply(skb, info);
+ if (err)
+ return err;
+ }
+
+ skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+ nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
+ NLMSG_DONE, 0, flags | NLM_F_MULTI);
+ if (!nlh) {
+ err = -EMSGSIZE;
+ goto nla_put_failure;
+ }
+
+ return genlmsg_reply(skb, info);
+
+nla_put_failure:
+ nlmsg_free(skb);
+ return err;
+}
+
+static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
+ struct netlink_callback *cb,
+ enum devlink_command cmd)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ int index = state->idx;
+ int tmp_index = index;
+ void *hdr;
+ int err;
+
+ hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+ &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
+ if (!hdr) {
+ err = -EMSGSIZE;
+ goto nla_put_failure;
+ }
+
+ err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
+ if ((err && err != -EMSGSIZE) || tmp_index == index)
+ goto nla_put_failure;
+
+ state->idx = index;
+ genlmsg_end(skb, hdr);
+ return skb->len;
+
+nla_put_failure:
+ genlmsg_cancel(skb, hdr);
+ return err;
+}
+
+struct devlink_health_reporter {
+ struct list_head list;
+ void *priv;
+ const struct devlink_health_reporter_ops *ops;
+ struct devlink *devlink;
+ struct devlink_port *devlink_port;
+ struct devlink_fmsg *dump_fmsg;
+ struct mutex dump_lock; /* lock parallel read/write from dump buffers */
+ u64 graceful_period;
+ bool auto_recover;
+ bool auto_dump;
+ u8 health_state;
+ u64 dump_ts;
+ u64 dump_real_ts;
+ u64 error_count;
+ u64 recovery_count;
+ u64 last_recovery_ts;
+};
+
+void *
+devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
+{
+ return reporter->priv;
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
+
+static struct devlink_health_reporter *
+__devlink_health_reporter_find_by_name(struct list_head *reporter_list,
+ const char *reporter_name)
+{
+ struct devlink_health_reporter *reporter;
+
+ list_for_each_entry(reporter, reporter_list, list)
+ if (!strcmp(reporter->ops->name, reporter_name))
+ return reporter;
+ return NULL;
+}
+
+static struct devlink_health_reporter *
+devlink_health_reporter_find_by_name(struct devlink *devlink,
+ const char *reporter_name)
+{
+ return __devlink_health_reporter_find_by_name(&devlink->reporter_list,
+ reporter_name);
+}
+
+static struct devlink_health_reporter *
+devlink_port_health_reporter_find_by_name(struct devlink_port *devlink_port,
+ const char *reporter_name)
+{
+ return __devlink_health_reporter_find_by_name(&devlink_port->reporter_list,
+ reporter_name);
+}
+
+static struct devlink_health_reporter *
+__devlink_health_reporter_create(struct devlink *devlink,
+ const struct devlink_health_reporter_ops *ops,
+ u64 graceful_period, void *priv)
+{
+ struct devlink_health_reporter *reporter;
+
+ if (WARN_ON(graceful_period && !ops->recover))
+ return ERR_PTR(-EINVAL);
+
+ reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
+ if (!reporter)
+ return ERR_PTR(-ENOMEM);
+
+ reporter->priv = priv;
+ reporter->ops = ops;
+ reporter->devlink = devlink;
+ reporter->graceful_period = graceful_period;
+ reporter->auto_recover = !!ops->recover;
+ reporter->auto_dump = !!ops->dump;
+ mutex_init(&reporter->dump_lock);
+ return reporter;
+}
+
+/**
+ * devl_port_health_reporter_create - create devlink health reporter for
+ * specified port instance
+ *
+ * @port: devlink_port which should contain the new reporter
+ * @ops: ops
+ * @graceful_period: to avoid recovery loops, in msecs
+ * @priv: priv
+ */
+struct devlink_health_reporter *
+devl_port_health_reporter_create(struct devlink_port *port,
+ const struct devlink_health_reporter_ops *ops,
+ u64 graceful_period, void *priv)
+{
+ struct devlink_health_reporter *reporter;
+
+ devl_assert_locked(port->devlink);
+
+ if (__devlink_health_reporter_find_by_name(&port->reporter_list,
+ ops->name))
+ return ERR_PTR(-EEXIST);
+
+ reporter = __devlink_health_reporter_create(port->devlink, ops,
+ graceful_period, priv);
+ if (IS_ERR(reporter))
+ return reporter;
+
+ reporter->devlink_port = port;
+ list_add_tail(&reporter->list, &port->reporter_list);
+ return reporter;
+}
+EXPORT_SYMBOL_GPL(devl_port_health_reporter_create);
+
+struct devlink_health_reporter *
+devlink_port_health_reporter_create(struct devlink_port *port,
+ const struct devlink_health_reporter_ops *ops,
+ u64 graceful_period, void *priv)
+{
+ struct devlink_health_reporter *reporter;
+ struct devlink *devlink = port->devlink;
+
+ devl_lock(devlink);
+ reporter = devl_port_health_reporter_create(port, ops,
+ graceful_period, priv);
+ devl_unlock(devlink);
+ return reporter;
+}
+EXPORT_SYMBOL_GPL(devlink_port_health_reporter_create);
+
+/**
+ * devl_health_reporter_create - create devlink health reporter
+ *
+ * @devlink: devlink
+ * @ops: ops
+ * @graceful_period: to avoid recovery loops, in msecs
+ * @priv: priv
+ */
+struct devlink_health_reporter *
+devl_health_reporter_create(struct devlink *devlink,
+ const struct devlink_health_reporter_ops *ops,
+ u64 graceful_period, void *priv)
+{
+ struct devlink_health_reporter *reporter;
+
+ devl_assert_locked(devlink);
+
+ if (devlink_health_reporter_find_by_name(devlink, ops->name))
+ return ERR_PTR(-EEXIST);
+
+ reporter = __devlink_health_reporter_create(devlink, ops,
+ graceful_period, priv);
+ if (IS_ERR(reporter))
+ return reporter;
+
+ list_add_tail(&reporter->list, &devlink->reporter_list);
+ return reporter;
+}
+EXPORT_SYMBOL_GPL(devl_health_reporter_create);
+
+struct devlink_health_reporter *
+devlink_health_reporter_create(struct devlink *devlink,
+ const struct devlink_health_reporter_ops *ops,
+ u64 graceful_period, void *priv)
+{
+ struct devlink_health_reporter *reporter;
+
+ devl_lock(devlink);
+ reporter = devl_health_reporter_create(devlink, ops,
+ graceful_period, priv);
+ devl_unlock(devlink);
+ return reporter;
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
+
+static void
+devlink_health_reporter_free(struct devlink_health_reporter *reporter)
+{
+ mutex_destroy(&reporter->dump_lock);
+ if (reporter->dump_fmsg)
+ devlink_fmsg_free(reporter->dump_fmsg);
+ kfree(reporter);
+}
+
+/**
+ * devl_health_reporter_destroy - destroy devlink health reporter
+ *
+ * @reporter: devlink health reporter to destroy
+ */
+void
+devl_health_reporter_destroy(struct devlink_health_reporter *reporter)
+{
+ devl_assert_locked(reporter->devlink);
+
+ list_del(&reporter->list);
+ devlink_health_reporter_free(reporter);
+}
+EXPORT_SYMBOL_GPL(devl_health_reporter_destroy);
+
+void
+devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
+{
+ struct devlink *devlink = reporter->devlink;
+
+ devl_lock(devlink);
+ devl_health_reporter_destroy(reporter);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
+
+static int
+devlink_nl_health_reporter_fill(struct sk_buff *msg,
+ struct devlink_health_reporter *reporter,
+ enum devlink_command cmd, u32 portid,
+ u32 seq, int flags)
+{
+ struct devlink *devlink = reporter->devlink;
+ struct nlattr *reporter_attr;
+ void *hdr;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto genlmsg_cancel;
+
+ if (reporter->devlink_port) {
+ if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, reporter->devlink_port->index))
+ goto genlmsg_cancel;
+ }
+ reporter_attr = nla_nest_start_noflag(msg,
+ DEVLINK_ATTR_HEALTH_REPORTER);
+ if (!reporter_attr)
+ goto genlmsg_cancel;
+ if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
+ reporter->ops->name))
+ goto reporter_nest_cancel;
+ if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
+ reporter->health_state))
+ goto reporter_nest_cancel;
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
+ reporter->error_count, DEVLINK_ATTR_PAD))
+ goto reporter_nest_cancel;
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
+ reporter->recovery_count, DEVLINK_ATTR_PAD))
+ goto reporter_nest_cancel;
+ if (reporter->ops->recover &&
+ nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
+ reporter->graceful_period,
+ DEVLINK_ATTR_PAD))
+ goto reporter_nest_cancel;
+ if (reporter->ops->recover &&
+ nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
+ reporter->auto_recover))
+ goto reporter_nest_cancel;
+ if (reporter->dump_fmsg &&
+ nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
+ jiffies_to_msecs(reporter->dump_ts),
+ DEVLINK_ATTR_PAD))
+ goto reporter_nest_cancel;
+ if (reporter->dump_fmsg &&
+ nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
+ reporter->dump_real_ts, DEVLINK_ATTR_PAD))
+ goto reporter_nest_cancel;
+ if (reporter->ops->dump &&
+ nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
+ reporter->auto_dump))
+ goto reporter_nest_cancel;
+
+ nla_nest_end(msg, reporter_attr);
+ genlmsg_end(msg, hdr);
+ return 0;
+
+reporter_nest_cancel:
+ nla_nest_end(msg, reporter_attr);
+genlmsg_cancel:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static void devlink_recover_notify(struct devlink_health_reporter *reporter,
+ enum devlink_command cmd)
+{
+ struct devlink *devlink = reporter->devlink;
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+ WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED));
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ err = devlink_nl_health_reporter_fill(msg, reporter, cmd, 0, 0, 0);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
+ 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+void
+devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
+{
+ reporter->recovery_count++;
+ reporter->last_recovery_ts = jiffies;
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
+
+static int
+devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
+ void *priv_ctx, struct netlink_ext_ack *extack)
+{
+ int err;
+
+ if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
+ return 0;
+
+ if (!reporter->ops->recover)
+ return -EOPNOTSUPP;
+
+ err = reporter->ops->recover(reporter, priv_ctx, extack);
+ if (err)
+ return err;
+
+ devlink_health_reporter_recovery_done(reporter);
+ reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
+ devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+
+ return 0;
+}
+
+static void
+devlink_health_dump_clear(struct devlink_health_reporter *reporter)
+{
+ if (!reporter->dump_fmsg)
+ return;
+ devlink_fmsg_free(reporter->dump_fmsg);
+ reporter->dump_fmsg = NULL;
+}
+
+static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
+ void *priv_ctx,
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ if (!reporter->ops->dump)
+ return 0;
+
+ if (reporter->dump_fmsg)
+ return 0;
+
+ reporter->dump_fmsg = devlink_fmsg_alloc();
+ if (!reporter->dump_fmsg) {
+ err = -ENOMEM;
+ return err;
+ }
+
+ err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
+ if (err)
+ goto dump_err;
+
+ err = reporter->ops->dump(reporter, reporter->dump_fmsg,
+ priv_ctx, extack);
+ if (err)
+ goto dump_err;
+
+ err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
+ if (err)
+ goto dump_err;
+
+ reporter->dump_ts = jiffies;
+ reporter->dump_real_ts = ktime_get_real_ns();
+
+ return 0;
+
+dump_err:
+ devlink_health_dump_clear(reporter);
+ return err;
+}
+
+int devlink_health_report(struct devlink_health_reporter *reporter,
+ const char *msg, void *priv_ctx)
+{
+ enum devlink_health_reporter_state prev_health_state;
+ struct devlink *devlink = reporter->devlink;
+ unsigned long recover_ts_threshold;
+ int ret;
+
+ /* write a log message of the current error */
+ WARN_ON(!msg);
+ trace_devlink_health_report(devlink, reporter->ops->name, msg);
+ reporter->error_count++;
+ prev_health_state = reporter->health_state;
+ reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
+ devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+
+ /* abort if the previous error wasn't recovered */
+ recover_ts_threshold = reporter->last_recovery_ts +
+ msecs_to_jiffies(reporter->graceful_period);
+ if (reporter->auto_recover &&
+ (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
+ (reporter->last_recovery_ts && reporter->recovery_count &&
+ time_is_after_jiffies(recover_ts_threshold)))) {
+ trace_devlink_health_recover_aborted(devlink,
+ reporter->ops->name,
+ reporter->health_state,
+ jiffies -
+ reporter->last_recovery_ts);
+ return -ECANCELED;
+ }
+
+ if (reporter->auto_dump) {
+ mutex_lock(&reporter->dump_lock);
+ /* store current dump of current error, for later analysis */
+ devlink_health_do_dump(reporter, priv_ctx, NULL);
+ mutex_unlock(&reporter->dump_lock);
+ }
+
+ if (!reporter->auto_recover)
+ return 0;
+
+ devl_lock(devlink);
+ ret = devlink_health_reporter_recover(reporter, priv_ctx, NULL);
+ devl_unlock(devlink);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devlink_health_report);
+
+static struct devlink_health_reporter *
+devlink_health_reporter_get_from_attrs(struct devlink *devlink,
+ struct nlattr **attrs)
+{
+ struct devlink_port *devlink_port;
+ char *reporter_name;
+
+ if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
+ return NULL;
+
+ reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
+ devlink_port = devlink_port_get_from_attrs(devlink, attrs);
+ if (IS_ERR(devlink_port))
+ return devlink_health_reporter_find_by_name(devlink,
+ reporter_name);
+ else
+ return devlink_port_health_reporter_find_by_name(devlink_port,
+ reporter_name);
+}
+
+static struct devlink_health_reporter *
+devlink_health_reporter_get_from_info(struct devlink *devlink,
+ struct genl_info *info)
+{
+ return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
+}
+
+static struct devlink_health_reporter *
+devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
+{
+ const struct genl_dumpit_info *info = genl_dumpit_info(cb);
+ struct devlink_health_reporter *reporter;
+ struct nlattr **attrs = info->attrs;
+ struct devlink *devlink;
+
+ devlink = devlink_get_from_attrs_lock(sock_net(cb->skb->sk), attrs);
+ if (IS_ERR(devlink))
+ return NULL;
+ devl_unlock(devlink);
+
+ reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
+ devlink_put(devlink);
+ return reporter;
+}
+
+void
+devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
+ enum devlink_health_reporter_state state)
+{
+ if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
+ state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
+ return;
+
+ if (reporter->health_state == state)
+ return;
+
+ reporter->health_state = state;
+ trace_devlink_health_reporter_state_update(reporter->devlink,
+ reporter->ops->name, state);
+ devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
+
+static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_health_reporter *reporter;
+ struct sk_buff *msg;
+ int err;
+
+ reporter = devlink_health_reporter_get_from_info(devlink, info);
+ if (!reporter)
+ return -EINVAL;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_health_reporter_fill(msg, reporter,
+ DEVLINK_CMD_HEALTH_REPORTER_GET,
+ info->snd_portid, info->snd_seq,
+ 0);
+ if (err) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int
+devlink_nl_cmd_health_reporter_get_dump_one(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_health_reporter *reporter;
+ struct devlink_port *port;
+ unsigned long port_index;
+ int idx = 0;
+ int err;
+
+ list_for_each_entry(reporter, &devlink->reporter_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_health_reporter_fill(msg, reporter,
+ DEVLINK_CMD_HEALTH_REPORTER_GET,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI);
+ if (err) {
+ state->idx = idx;
+ return err;
+ }
+ idx++;
+ }
+ xa_for_each(&devlink->ports, port_index, port) {
+ list_for_each_entry(reporter, &port->reporter_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_health_reporter_fill(msg, reporter,
+ DEVLINK_CMD_HEALTH_REPORTER_GET,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI);
+ if (err) {
+ state->idx = idx;
+ return err;
+ }
+ idx++;
+ }
+ }
+
+ return 0;
+}
+
+const struct devlink_cmd devl_cmd_health_reporter_get = {
+ .dump_one = devlink_nl_cmd_health_reporter_get_dump_one,
+};
+
+static int
+devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_health_reporter *reporter;
+
+ reporter = devlink_health_reporter_get_from_info(devlink, info);
+ if (!reporter)
+ return -EINVAL;
+
+ if (!reporter->ops->recover &&
+ (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
+ info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]))
+ return -EOPNOTSUPP;
+
+ if (!reporter->ops->dump &&
+ info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
+ return -EOPNOTSUPP;
+
+ if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
+ reporter->graceful_period =
+ nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
+
+ if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
+ reporter->auto_recover =
+ nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
+
+ if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
+ reporter->auto_dump =
+ nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
+
+ return 0;
+}
+
+static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_health_reporter *reporter;
+
+ reporter = devlink_health_reporter_get_from_info(devlink, info);
+ if (!reporter)
+ return -EINVAL;
+
+ return devlink_health_reporter_recover(reporter, NULL, info->extack);
+}
+
+static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_health_reporter *reporter;
+ struct devlink_fmsg *fmsg;
+ int err;
+
+ reporter = devlink_health_reporter_get_from_info(devlink, info);
+ if (!reporter)
+ return -EINVAL;
+
+ if (!reporter->ops->diagnose)
+ return -EOPNOTSUPP;
+
+ fmsg = devlink_fmsg_alloc();
+ if (!fmsg)
+ return -ENOMEM;
+
+ err = devlink_fmsg_obj_nest_start(fmsg);
+ if (err)
+ goto out;
+
+ err = reporter->ops->diagnose(reporter, fmsg, info->extack);
+ if (err)
+ goto out;
+
+ err = devlink_fmsg_obj_nest_end(fmsg);
+ if (err)
+ goto out;
+
+ err = devlink_fmsg_snd(fmsg, info,
+ DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
+
+out:
+ devlink_fmsg_free(fmsg);
+ return err;
+}
+
+static int
+devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_health_reporter *reporter;
+ int err;
+
+ reporter = devlink_health_reporter_get_from_cb(cb);
+ if (!reporter)
+ return -EINVAL;
+
+ if (!reporter->ops->dump)
+ return -EOPNOTSUPP;
+
+ mutex_lock(&reporter->dump_lock);
+ if (!state->idx) {
+ err = devlink_health_do_dump(reporter, NULL, cb->extack);
+ if (err)
+ goto unlock;
+ state->dump_ts = reporter->dump_ts;
+ }
+ if (!reporter->dump_fmsg || state->dump_ts != reporter->dump_ts) {
+ NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
+ err = -EAGAIN;
+ goto unlock;
+ }
+
+ err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
+ DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
+unlock:
+ mutex_unlock(&reporter->dump_lock);
+ return err;
+}
+
+static int
+devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_health_reporter *reporter;
+
+ reporter = devlink_health_reporter_get_from_info(devlink, info);
+ if (!reporter)
+ return -EINVAL;
+
+ if (!reporter->ops->dump)
+ return -EOPNOTSUPP;
+
+ mutex_lock(&reporter->dump_lock);
+ devlink_health_dump_clear(reporter);
+ mutex_unlock(&reporter->dump_lock);
+ return 0;
+}
+
+static int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_health_reporter *reporter;
+
+ reporter = devlink_health_reporter_get_from_info(devlink, info);
+ if (!reporter)
+ return -EINVAL;
+
+ if (!reporter->ops->test)
+ return -EOPNOTSUPP;
+
+ return reporter->ops->test(reporter, info->extack);
+}
+
+struct devlink_stats {
+ u64_stats_t rx_bytes;
+ u64_stats_t rx_packets;
+ struct u64_stats_sync syncp;
+};
+
+/**
+ * struct devlink_trap_policer_item - Packet trap policer attributes.
+ * @policer: Immutable packet trap policer attributes.
+ * @rate: Rate in packets / sec.
+ * @burst: Burst size in packets.
+ * @list: trap_policer_list member.
+ *
+ * Describes packet trap policer attributes. Created by devlink during trap
+ * policer registration.
+ */
+struct devlink_trap_policer_item {
+ const struct devlink_trap_policer *policer;
+ u64 rate;
+ u64 burst;
+ struct list_head list;
+};
+
+/**
+ * struct devlink_trap_group_item - Packet trap group attributes.
+ * @group: Immutable packet trap group attributes.
+ * @policer_item: Associated policer item. Can be NULL.
+ * @list: trap_group_list member.
+ * @stats: Trap group statistics.
+ *
+ * Describes packet trap group attributes. Created by devlink during trap
+ * group registration.
+ */
+struct devlink_trap_group_item {
+ const struct devlink_trap_group *group;
+ struct devlink_trap_policer_item *policer_item;
+ struct list_head list;
+ struct devlink_stats __percpu *stats;
+};
+
+/**
+ * struct devlink_trap_item - Packet trap attributes.
+ * @trap: Immutable packet trap attributes.
+ * @group_item: Associated group item.
+ * @list: trap_list member.
+ * @action: Trap action.
+ * @stats: Trap statistics.
+ * @priv: Driver private information.
+ *
+ * Describes both mutable and immutable packet trap attributes. Created by
+ * devlink during trap registration and used for all trap related operations.
+ */
+struct devlink_trap_item {
+ const struct devlink_trap *trap;
+ struct devlink_trap_group_item *group_item;
+ struct list_head list;
+ enum devlink_trap_action action;
+ struct devlink_stats __percpu *stats;
+ void *priv;
+};
+
+static struct devlink_trap_policer_item *
+devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id)
+{
+ struct devlink_trap_policer_item *policer_item;
+
+ list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
+ if (policer_item->policer->id == id)
+ return policer_item;
+ }
+
+ return NULL;
+}
+
+static struct devlink_trap_item *
+devlink_trap_item_lookup(struct devlink *devlink, const char *name)
+{
+ struct devlink_trap_item *trap_item;
+
+ list_for_each_entry(trap_item, &devlink->trap_list, list) {
+ if (!strcmp(trap_item->trap->name, name))
+ return trap_item;
+ }
+
+ return NULL;
+}
+
+static struct devlink_trap_item *
+devlink_trap_item_get_from_info(struct devlink *devlink,
+ struct genl_info *info)
+{
+ struct nlattr *attr;
+
+ if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
+ return NULL;
+ attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
+
+ return devlink_trap_item_lookup(devlink, nla_data(attr));
+}
+
+static int
+devlink_trap_action_get_from_info(struct genl_info *info,
+ enum devlink_trap_action *p_trap_action)
+{
+ u8 val;
+
+ val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
+ switch (val) {
+ case DEVLINK_TRAP_ACTION_DROP:
+ case DEVLINK_TRAP_ACTION_TRAP:
+ case DEVLINK_TRAP_ACTION_MIRROR:
+ *p_trap_action = val;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int devlink_trap_metadata_put(struct sk_buff *msg,
+ const struct devlink_trap *trap)
+{
+ struct nlattr *attr;
+
+ attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
+ if (!attr)
+ return -EMSGSIZE;
+
+ if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
+ nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
+ goto nla_put_failure;
+ if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) &&
+ nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, attr);
+
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, attr);
+ return -EMSGSIZE;
+}
+
+static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
+ struct devlink_stats *stats)
+{
+ int i;
+
+ memset(stats, 0, sizeof(*stats));
+ for_each_possible_cpu(i) {
+ struct devlink_stats *cpu_stats;
+ u64 rx_packets, rx_bytes;
+ unsigned int start;
+
+ cpu_stats = per_cpu_ptr(trap_stats, i);
+ do {
+ start = u64_stats_fetch_begin(&cpu_stats->syncp);
+ rx_packets = u64_stats_read(&cpu_stats->rx_packets);
+ rx_bytes = u64_stats_read(&cpu_stats->rx_bytes);
+ } while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
+
+ u64_stats_add(&stats->rx_packets, rx_packets);
+ u64_stats_add(&stats->rx_bytes, rx_bytes);
+ }
+}
+
+static int
+devlink_trap_group_stats_put(struct sk_buff *msg,
+ struct devlink_stats __percpu *trap_stats)
+{
+ struct devlink_stats stats;
+ struct nlattr *attr;
+
+ devlink_trap_stats_read(trap_stats, &stats);
+
+ attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
+ if (!attr)
+ return -EMSGSIZE;
+
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
+ u64_stats_read(&stats.rx_packets),
+ DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
+ u64_stats_read(&stats.rx_bytes),
+ DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, attr);
+
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, attr);
+ return -EMSGSIZE;
+}
+
+static int devlink_trap_stats_put(struct sk_buff *msg, struct devlink *devlink,
+ const struct devlink_trap_item *trap_item)
+{
+ struct devlink_stats stats;
+ struct nlattr *attr;
+ u64 drops = 0;
+ int err;
+
+ if (devlink->ops->trap_drop_counter_get) {
+ err = devlink->ops->trap_drop_counter_get(devlink,
+ trap_item->trap,
+ &drops);
+ if (err)
+ return err;
+ }
+
+ devlink_trap_stats_read(trap_item->stats, &stats);
+
+ attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
+ if (!attr)
+ return -EMSGSIZE;
+
+ if (devlink->ops->trap_drop_counter_get &&
+ nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
+ DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
+ u64_stats_read(&stats.rx_packets),
+ DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
+ u64_stats_read(&stats.rx_bytes),
+ DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, attr);
+
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, attr);
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
+ const struct devlink_trap_item *trap_item,
+ enum devlink_command cmd, u32 portid, u32 seq,
+ int flags)
+{
+ struct devlink_trap_group_item *group_item = trap_item->group_item;
+ void *hdr;
+ int err;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+
+ if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
+ group_item->group->name))
+ goto nla_put_failure;
+
+ if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
+ goto nla_put_failure;
+
+ if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
+ goto nla_put_failure;
+
+ if (trap_item->trap->generic &&
+ nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
+ goto nla_put_failure;
+
+ if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
+ goto nla_put_failure;
+
+ err = devlink_trap_metadata_put(msg, trap_item->trap);
+ if (err)
+ goto nla_put_failure;
+
+ err = devlink_trap_stats_put(msg, devlink, trap_item);
+ if (err)
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_trap_item *trap_item;
+ struct sk_buff *msg;
+ int err;
+
+ if (list_empty(&devlink->trap_list))
+ return -EOPNOTSUPP;
+
+ trap_item = devlink_trap_item_get_from_info(devlink, info);
+ if (!trap_item) {
+ NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
+ return -ENOENT;
+ }
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_trap_fill(msg, devlink, trap_item,
+ DEVLINK_CMD_TRAP_NEW, info->snd_portid,
+ info->snd_seq, 0);
+ if (err)
+ goto err_trap_fill;
+
+ return genlmsg_reply(msg, info);
+
+err_trap_fill:
+ nlmsg_free(msg);
+ return err;
+}
+
+static int
+devlink_nl_cmd_trap_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_trap_item *trap_item;
+ int idx = 0;
+ int err = 0;
+
+ list_for_each_entry(trap_item, &devlink->trap_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_trap_fill(msg, devlink, trap_item,
+ DEVLINK_CMD_TRAP_NEW,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI);
+ if (err) {
+ state->idx = idx;
+ break;
+ }
+ idx++;
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_trap_get = {
+ .dump_one = devlink_nl_cmd_trap_get_dump_one,
+};
+
+static int __devlink_trap_action_set(struct devlink *devlink,
+ struct devlink_trap_item *trap_item,
+ enum devlink_trap_action trap_action,
+ struct netlink_ext_ack *extack)
+{
+ int err;
+
+ if (trap_item->action != trap_action &&
+ trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
+ NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
+ return 0;
+ }
+
+ err = devlink->ops->trap_action_set(devlink, trap_item->trap,
+ trap_action, extack);
+ if (err)
+ return err;
+
+ trap_item->action = trap_action;
+
+ return 0;
+}
+
+static int devlink_trap_action_set(struct devlink *devlink,
+ struct devlink_trap_item *trap_item,
+ struct genl_info *info)
+{
+ enum devlink_trap_action trap_action;
+ int err;
+
+ if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
+ return 0;
+
+ err = devlink_trap_action_get_from_info(info, &trap_action);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
+ return -EINVAL;
+ }
+
+ return __devlink_trap_action_set(devlink, trap_item, trap_action,
+ info->extack);
+}
+
+static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_trap_item *trap_item;
+
+ if (list_empty(&devlink->trap_list))
+ return -EOPNOTSUPP;
+
+ trap_item = devlink_trap_item_get_from_info(devlink, info);
+ if (!trap_item) {
+ NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
+ return -ENOENT;
+ }
+
+ return devlink_trap_action_set(devlink, trap_item, info);
+}
+
+static struct devlink_trap_group_item *
+devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
+{
+ struct devlink_trap_group_item *group_item;
+
+ list_for_each_entry(group_item, &devlink->trap_group_list, list) {
+ if (!strcmp(group_item->group->name, name))
+ return group_item;
+ }
+
+ return NULL;
+}
+
+static struct devlink_trap_group_item *
+devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id)
+{
+ struct devlink_trap_group_item *group_item;
+
+ list_for_each_entry(group_item, &devlink->trap_group_list, list) {
+ if (group_item->group->id == id)
+ return group_item;
+ }
+
+ return NULL;
+}
+
+static struct devlink_trap_group_item *
+devlink_trap_group_item_get_from_info(struct devlink *devlink,
+ struct genl_info *info)
+{
+ char *name;
+
+ if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
+ return NULL;
+ name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
+
+ return devlink_trap_group_item_lookup(devlink, name);
+}
+
+static int
+devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
+ const struct devlink_trap_group_item *group_item,
+ enum devlink_command cmd, u32 portid, u32 seq,
+ int flags)
+{
+ void *hdr;
+ int err;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+
+ if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
+ group_item->group->name))
+ goto nla_put_failure;
+
+ if (group_item->group->generic &&
+ nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
+ goto nla_put_failure;
+
+ if (group_item->policer_item &&
+ nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
+ group_item->policer_item->policer->id))
+ goto nla_put_failure;
+
+ err = devlink_trap_group_stats_put(msg, group_item->stats);
+ if (err)
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_trap_group_item *group_item;
+ struct sk_buff *msg;
+ int err;
+
+ if (list_empty(&devlink->trap_group_list))
+ return -EOPNOTSUPP;
+
+ group_item = devlink_trap_group_item_get_from_info(devlink, info);
+ if (!group_item) {
+ NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
+ return -ENOENT;
+ }
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_trap_group_fill(msg, devlink, group_item,
+ DEVLINK_CMD_TRAP_GROUP_NEW,
+ info->snd_portid, info->snd_seq, 0);
+ if (err)
+ goto err_trap_group_fill;
+
+ return genlmsg_reply(msg, info);
+
+err_trap_group_fill:
+ nlmsg_free(msg);
+ return err;
+}
+
+static int
+devlink_nl_cmd_trap_group_get_dump_one(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_trap_group_item *group_item;
+ int idx = 0;
+ int err = 0;
+
+
+ list_for_each_entry(group_item, &devlink->trap_group_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_trap_group_fill(msg, devlink, group_item,
+ DEVLINK_CMD_TRAP_GROUP_NEW,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI);
+ if (err) {
+ state->idx = idx;
+ break;
+ }
+ idx++;
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_trap_group_get = {
+ .dump_one = devlink_nl_cmd_trap_group_get_dump_one,
+};
+
+static int
+__devlink_trap_group_action_set(struct devlink *devlink,
+ struct devlink_trap_group_item *group_item,
+ enum devlink_trap_action trap_action,
+ struct netlink_ext_ack *extack)
+{
+ const char *group_name = group_item->group->name;
+ struct devlink_trap_item *trap_item;
+ int err;
+
+ if (devlink->ops->trap_group_action_set) {
+ err = devlink->ops->trap_group_action_set(devlink, group_item->group,
+ trap_action, extack);
+ if (err)
+ return err;
+
+ list_for_each_entry(trap_item, &devlink->trap_list, list) {
+ if (strcmp(trap_item->group_item->group->name, group_name))
+ continue;
+ if (trap_item->action != trap_action &&
+ trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP)
+ continue;
+ trap_item->action = trap_action;
+ }
+
+ return 0;
+ }
+
+ list_for_each_entry(trap_item, &devlink->trap_list, list) {
+ if (strcmp(trap_item->group_item->group->name, group_name))
+ continue;
+ err = __devlink_trap_action_set(devlink, trap_item,
+ trap_action, extack);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int
+devlink_trap_group_action_set(struct devlink *devlink,
+ struct devlink_trap_group_item *group_item,
+ struct genl_info *info, bool *p_modified)
+{
+ enum devlink_trap_action trap_action;
+ int err;
+
+ if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
+ return 0;
+
+ err = devlink_trap_action_get_from_info(info, &trap_action);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
+ return -EINVAL;
+ }
+
+ err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
+ info->extack);
+ if (err)
+ return err;
+
+ *p_modified = true;
+
+ return 0;
+}
+
+static int devlink_trap_group_set(struct devlink *devlink,
+ struct devlink_trap_group_item *group_item,
+ struct genl_info *info)
+{
+ struct devlink_trap_policer_item *policer_item;
+ struct netlink_ext_ack *extack = info->extack;
+ const struct devlink_trap_policer *policer;
+ struct nlattr **attrs = info->attrs;
+ u32 policer_id;
+ int err;
+
+ if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
+ return 0;
+
+ if (!devlink->ops->trap_group_set)
+ return -EOPNOTSUPP;
+
+ policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
+ policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
+ if (policer_id && !policer_item) {
+ NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
+ return -ENOENT;
+ }
+ policer = policer_item ? policer_item->policer : NULL;
+
+ err = devlink->ops->trap_group_set(devlink, group_item->group, policer,
+ extack);
+ if (err)
+ return err;
+
+ group_item->policer_item = policer_item;
+
+ return 0;
+}
+
+static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_trap_group_item *group_item;
+ bool modified = false;
+ int err;
+
+ if (list_empty(&devlink->trap_group_list))
+ return -EOPNOTSUPP;
+
+ group_item = devlink_trap_group_item_get_from_info(devlink, info);
+ if (!group_item) {
+ NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
+ return -ENOENT;
+ }
+
+ err = devlink_trap_group_action_set(devlink, group_item, info,
+ &modified);
+ if (err)
+ return err;
+
+ err = devlink_trap_group_set(devlink, group_item, info);
+ if (err)
+ goto err_trap_group_set;
+
+ return 0;
+
+err_trap_group_set:
+ if (modified)
+ NL_SET_ERR_MSG_MOD(extack, "Trap group set failed, but some changes were committed already");
+ return err;
+}
+
+static struct devlink_trap_policer_item *
+devlink_trap_policer_item_get_from_info(struct devlink *devlink,
+ struct genl_info *info)
+{
+ u32 id;
+
+ if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
+ return NULL;
+ id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
+
+ return devlink_trap_policer_item_lookup(devlink, id);
+}
+
+static int
+devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink,
+ const struct devlink_trap_policer *policer)
+{
+ struct nlattr *attr;
+ u64 drops;
+ int err;
+
+ if (!devlink->ops->trap_policer_counter_get)
+ return 0;
+
+ err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops);
+ if (err)
+ return err;
+
+ attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
+ if (!attr)
+ return -EMSGSIZE;
+
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
+ DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, attr);
+
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, attr);
+ return -EMSGSIZE;
+}
+
+static int
+devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink,
+ const struct devlink_trap_policer_item *policer_item,
+ enum devlink_command cmd, u32 portid, u32 seq,
+ int flags)
+{
+ void *hdr;
+ int err;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (devlink_nl_put_handle(msg, devlink))
+ goto nla_put_failure;
+
+ if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
+ policer_item->policer->id))
+ goto nla_put_failure;
+
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE,
+ policer_item->rate, DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST,
+ policer_item->burst, DEVLINK_ATTR_PAD))
+ goto nla_put_failure;
+
+ err = devlink_trap_policer_stats_put(msg, devlink,
+ policer_item->policer);
+ if (err)
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_cmd_trap_policer_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_trap_policer_item *policer_item;
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink *devlink = info->user_ptr[0];
+ struct sk_buff *msg;
+ int err;
+
+ if (list_empty(&devlink->trap_policer_list))
+ return -EOPNOTSUPP;
+
+ policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
+ if (!policer_item) {
+ NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
+ return -ENOENT;
+ }
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
+ DEVLINK_CMD_TRAP_POLICER_NEW,
+ info->snd_portid, info->snd_seq, 0);
+ if (err)
+ goto err_trap_policer_fill;
+
+ return genlmsg_reply(msg, info);
+
+err_trap_policer_fill:
+ nlmsg_free(msg);
+ return err;
+}
+
+static int
+devlink_nl_cmd_trap_policer_get_dump_one(struct sk_buff *msg,
+ struct devlink *devlink,
+ struct netlink_callback *cb)
+{
+ struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+ struct devlink_trap_policer_item *policer_item;
+ int idx = 0;
+ int err = 0;
+
+ list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
+ if (idx < state->idx) {
+ idx++;
+ continue;
+ }
+ err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
+ DEVLINK_CMD_TRAP_POLICER_NEW,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq,
+ NLM_F_MULTI);
+ if (err) {
+ state->idx = idx;
+ break;
+ }
+ idx++;
+ }
+
+ return err;
+}
+
+const struct devlink_cmd devl_cmd_trap_policer_get = {
+ .dump_one = devlink_nl_cmd_trap_policer_get_dump_one,
+};
+
+static int
+devlink_trap_policer_set(struct devlink *devlink,
+ struct devlink_trap_policer_item *policer_item,
+ struct genl_info *info)
+{
+ struct netlink_ext_ack *extack = info->extack;
+ struct nlattr **attrs = info->attrs;
+ u64 rate, burst;
+ int err;
+
+ rate = policer_item->rate;
+ burst = policer_item->burst;
+
+ if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE])
+ rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]);
+
+ if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST])
+ burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]);
+
+ if (rate < policer_item->policer->min_rate) {
+ NL_SET_ERR_MSG_MOD(extack, "Policer rate lower than limit");
+ return -EINVAL;
+ }
+
+ if (rate > policer_item->policer->max_rate) {
+ NL_SET_ERR_MSG_MOD(extack, "Policer rate higher than limit");
+ return -EINVAL;
+ }
+
+ if (burst < policer_item->policer->min_burst) {
+ NL_SET_ERR_MSG_MOD(extack, "Policer burst size lower than limit");
+ return -EINVAL;
+ }
+
+ if (burst > policer_item->policer->max_burst) {
+ NL_SET_ERR_MSG_MOD(extack, "Policer burst size higher than limit");
+ return -EINVAL;
+ }
+
+ err = devlink->ops->trap_policer_set(devlink, policer_item->policer,
+ rate, burst, info->extack);
+ if (err)
+ return err;
+
+ policer_item->rate = rate;
+ policer_item->burst = burst;
+
+ return 0;
+}
+
+static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_trap_policer_item *policer_item;
+ struct netlink_ext_ack *extack = info->extack;
+ struct devlink *devlink = info->user_ptr[0];
+
+ if (list_empty(&devlink->trap_policer_list))
+ return -EOPNOTSUPP;
+
+ if (!devlink->ops->trap_policer_set)
+ return -EOPNOTSUPP;
+
+ policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
+ if (!policer_item) {
+ NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
+ return -ENOENT;
+ }
+
+ return devlink_trap_policer_set(devlink, policer_item, info);
+}
+
+const struct genl_small_ops devlink_nl_ops[56] = {
+ {
+ .cmd = DEVLINK_CMD_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_PORT_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_port_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_PORT_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_port_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_RATE_GET,
+ .doit = devlink_nl_cmd_rate_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_RATE,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_RATE_SET,
+ .doit = devlink_nl_cmd_rate_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_RATE,
+ },
+ {
+ .cmd = DEVLINK_CMD_RATE_NEW,
+ .doit = devlink_nl_cmd_rate_new_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_RATE_DEL,
+ .doit = devlink_nl_cmd_rate_del_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_RATE_NODE,
+ },
+ {
+ .cmd = DEVLINK_CMD_PORT_SPLIT,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_port_split_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_PORT_UNSPLIT,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_port_unsplit_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_PORT_NEW,
+ .doit = devlink_nl_cmd_port_new_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_PORT_DEL,
+ .doit = devlink_nl_cmd_port_del_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_LINECARD_GET,
+ .doit = devlink_nl_cmd_linecard_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_LINECARD,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_LINECARD_SET,
+ .doit = devlink_nl_cmd_linecard_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_LINECARD,
+ },
+ {
+ .cmd = DEVLINK_CMD_SB_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_sb_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_SB_POOL_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_sb_pool_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_SB_POOL_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_sb_pool_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_sb_port_pool_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_sb_port_pool_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_ESWITCH_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_eswitch_get_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_ESWITCH_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_eswitch_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_dpipe_table_get,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_dpipe_entries_get,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_dpipe_headers_get,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_dpipe_table_counters_set,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_RESOURCE_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_resource_set,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_RESOURCE_DUMP,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_resource_dump,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_RELOAD,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_reload,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_PARAM_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_param_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_PARAM_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_param_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_PORT_PARAM_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_port_param_get_doit,
+ .dumpit = devlink_nl_cmd_port_param_get_dumpit,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_PORT_PARAM_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_port_param_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_REGION_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_region_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_REGION_NEW,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_region_new,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_REGION_DEL,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_region_del,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_REGION_READ,
+ .validate = GENL_DONT_VALIDATE_STRICT |
+ GENL_DONT_VALIDATE_DUMP_STRICT,
+ .dumpit = devlink_nl_cmd_region_read_dumpit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_INFO_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_info_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_health_reporter_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_health_reporter_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_health_reporter_recover_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
+ .validate = GENL_DONT_VALIDATE_STRICT |
+ GENL_DONT_VALIDATE_DUMP_STRICT,
+ .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_HEALTH_REPORTER_TEST,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_health_reporter_test_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT,
+ },
+ {
+ .cmd = DEVLINK_CMD_FLASH_UPDATE,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_flash_update,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_TRAP_GET,
+ .doit = devlink_nl_cmd_trap_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_TRAP_SET,
+ .doit = devlink_nl_cmd_trap_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
+ .doit = devlink_nl_cmd_trap_group_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
+ .doit = devlink_nl_cmd_trap_group_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_TRAP_POLICER_GET,
+ .doit = devlink_nl_cmd_trap_policer_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_TRAP_POLICER_SET,
+ .doit = devlink_nl_cmd_trap_policer_set_doit,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = DEVLINK_CMD_SELFTESTS_GET,
+ .doit = devlink_nl_cmd_selftests_get_doit,
+ .dumpit = devlink_nl_instance_iter_dumpit,
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_SELFTESTS_RUN,
+ .doit = devlink_nl_cmd_selftests_run,
+ .flags = GENL_ADMIN_PERM,
+ },
+ /* -- No new ops here! Use split ops going forward! -- */
+};
+
+static void
+devlink_trap_policer_notify(struct devlink *devlink,
+ const struct devlink_trap_policer_item *policer_item,
+ enum devlink_command cmd);
+static void
+devlink_trap_group_notify(struct devlink *devlink,
+ const struct devlink_trap_group_item *group_item,
+ enum devlink_command cmd);
+static void devlink_trap_notify(struct devlink *devlink,
+ const struct devlink_trap_item *trap_item,
+ enum devlink_command cmd);
+
+void devlink_notify_register(struct devlink *devlink)
+{
+ struct devlink_trap_policer_item *policer_item;
+ struct devlink_trap_group_item *group_item;
+ struct devlink_param_item *param_item;
+ struct devlink_trap_item *trap_item;
+ struct devlink_port *devlink_port;
+ struct devlink_linecard *linecard;
+ struct devlink_rate *rate_node;
+ struct devlink_region *region;
+ unsigned long port_index;
+
+ devlink_notify(devlink, DEVLINK_CMD_NEW);
+ list_for_each_entry(linecard, &devlink->linecard_list, list)
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+
+ xa_for_each(&devlink->ports, port_index, devlink_port)
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
+
+ list_for_each_entry(policer_item, &devlink->trap_policer_list, list)
+ devlink_trap_policer_notify(devlink, policer_item,
+ DEVLINK_CMD_TRAP_POLICER_NEW);
+
+ list_for_each_entry(group_item, &devlink->trap_group_list, list)
+ devlink_trap_group_notify(devlink, group_item,
+ DEVLINK_CMD_TRAP_GROUP_NEW);
+
+ list_for_each_entry(trap_item, &devlink->trap_list, list)
+ devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
+
+ list_for_each_entry(rate_node, &devlink->rate_list, list)
+ devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_NEW);
+
+ list_for_each_entry(region, &devlink->region_list, list)
+ devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
+
+ list_for_each_entry(param_item, &devlink->param_list, list)
+ devlink_param_notify(devlink, 0, param_item,
+ DEVLINK_CMD_PARAM_NEW);
+}
+
+void devlink_notify_unregister(struct devlink *devlink)
+{
+ struct devlink_trap_policer_item *policer_item;
+ struct devlink_trap_group_item *group_item;
+ struct devlink_param_item *param_item;
+ struct devlink_trap_item *trap_item;
+ struct devlink_port *devlink_port;
+ struct devlink_rate *rate_node;
+ struct devlink_region *region;
+ unsigned long port_index;
+
+ list_for_each_entry_reverse(param_item, &devlink->param_list, list)
+ devlink_param_notify(devlink, 0, param_item,
+ DEVLINK_CMD_PARAM_DEL);
+
+ list_for_each_entry_reverse(region, &devlink->region_list, list)
+ devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
+
+ list_for_each_entry_reverse(rate_node, &devlink->rate_list, list)
+ devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_DEL);
+
+ list_for_each_entry_reverse(trap_item, &devlink->trap_list, list)
+ devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
+
+ list_for_each_entry_reverse(group_item, &devlink->trap_group_list, list)
+ devlink_trap_group_notify(devlink, group_item,
+ DEVLINK_CMD_TRAP_GROUP_DEL);
+ list_for_each_entry_reverse(policer_item, &devlink->trap_policer_list,
+ list)
+ devlink_trap_policer_notify(devlink, policer_item,
+ DEVLINK_CMD_TRAP_POLICER_DEL);
+
+ xa_for_each(&devlink->ports, port_index, devlink_port)
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
+ devlink_notify(devlink, DEVLINK_CMD_DEL);
+}
+
+static void devlink_port_type_warn(struct work_struct *work)
+{
+ WARN(true, "Type was not set for devlink port.");
+}
+
+static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
+{
+ /* Ignore CPU and DSA flavours. */
+ return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
+ devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA &&
+ devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED;
+}
+
+#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
+
+static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
+{
+ if (!devlink_port_type_should_warn(devlink_port))
+ return;
+ /* Schedule a work to WARN in case driver does not set port
+ * type within timeout.
+ */
+ schedule_delayed_work(&devlink_port->type_warn_dw,
+ DEVLINK_PORT_TYPE_WARN_TIMEOUT);
+}
+
+static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
+{
+ if (!devlink_port_type_should_warn(devlink_port))
+ return;
+ cancel_delayed_work_sync(&devlink_port->type_warn_dw);
+}
+
+/**
+ * devlink_port_init() - Init devlink port
+ *
+ * @devlink: devlink
+ * @devlink_port: devlink port
+ *
+ * Initialize essencial stuff that is needed for functions
+ * that may be called before devlink port registration.
+ * Call to this function is optional and not needed
+ * in case the driver does not use such functions.
+ */
+void devlink_port_init(struct devlink *devlink,
+ struct devlink_port *devlink_port)
+{
+ if (devlink_port->initialized)
+ return;
+ devlink_port->devlink = devlink;
+ INIT_LIST_HEAD(&devlink_port->region_list);
+ devlink_port->initialized = true;
+}
+EXPORT_SYMBOL_GPL(devlink_port_init);
+
+/**
+ * devlink_port_fini() - Deinitialize devlink port
+ *
+ * @devlink_port: devlink port
+ *
+ * Deinitialize essencial stuff that is in use for functions
+ * that may be called after devlink port unregistration.
+ * Call to this function is optional and not needed
+ * in case the driver does not use such functions.
+ */
+void devlink_port_fini(struct devlink_port *devlink_port)
+{
+ WARN_ON(!list_empty(&devlink_port->region_list));
+}
+EXPORT_SYMBOL_GPL(devlink_port_fini);
+
+/**
+ * devl_port_register() - Register devlink port
+ *
+ * @devlink: devlink
+ * @devlink_port: devlink port
+ * @port_index: driver-specific numerical identifier of the port
+ *
+ * Register devlink port with provided port index. User can use
+ * any indexing, even hw-related one. devlink_port structure
+ * is convenient to be embedded inside user driver private structure.
+ * Note that the caller should take care of zeroing the devlink_port
+ * structure.
+ */
+int devl_port_register(struct devlink *devlink,
+ struct devlink_port *devlink_port,
+ unsigned int port_index)
+{
+ int err;
+
+ devl_assert_locked(devlink);
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ devlink_port_init(devlink, devlink_port);
+ devlink_port->registered = true;
+ devlink_port->index = port_index;
+ spin_lock_init(&devlink_port->type_lock);
+ INIT_LIST_HEAD(&devlink_port->reporter_list);
+ err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL);
+ if (err)
+ return err;
+
+ INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
+ devlink_port_type_warn_schedule(devlink_port);
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devl_port_register);
+
+/**
+ * devlink_port_register - Register devlink port
+ *
+ * @devlink: devlink
+ * @devlink_port: devlink port
+ * @port_index: driver-specific numerical identifier of the port
+ *
+ * Register devlink port with provided port index. User can use
+ * any indexing, even hw-related one. devlink_port structure
+ * is convenient to be embedded inside user driver private structure.
+ * Note that the caller should take care of zeroing the devlink_port
+ * structure.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+int devlink_port_register(struct devlink *devlink,
+ struct devlink_port *devlink_port,
+ unsigned int port_index)
+{
+ int err;
+
+ devl_lock(devlink);
+ err = devl_port_register(devlink, devlink_port, port_index);
+ devl_unlock(devlink);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_port_register);
+
+/**
+ * devl_port_unregister() - Unregister devlink port
+ *
+ * @devlink_port: devlink port
+ */
+void devl_port_unregister(struct devlink_port *devlink_port)
+{
+ lockdep_assert_held(&devlink_port->devlink->lock);
+ WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET);
+
+ devlink_port_type_warn_cancel(devlink_port);
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
+ xa_erase(&devlink_port->devlink->ports, devlink_port->index);
+ WARN_ON(!list_empty(&devlink_port->reporter_list));
+ devlink_port->registered = false;
+}
+EXPORT_SYMBOL_GPL(devl_port_unregister);
+
+/**
+ * devlink_port_unregister - Unregister devlink port
+ *
+ * @devlink_port: devlink port
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_port_unregister(struct devlink_port *devlink_port)
+{
+ struct devlink *devlink = devlink_port->devlink;
+
+ devl_lock(devlink);
+ devl_port_unregister(devlink_port);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_port_unregister);
+
+static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port,
+ struct net_device *netdev)
+{
+ const struct net_device_ops *ops = netdev->netdev_ops;
+
+ /* If driver registers devlink port, it should set devlink port
+ * attributes accordingly so the compat functions are called
+ * and the original ops are not used.
+ */
+ if (ops->ndo_get_phys_port_name) {
+ /* Some drivers use the same set of ndos for netdevs
+ * that have devlink_port registered and also for
+ * those who don't. Make sure that ndo_get_phys_port_name
+ * returns -EOPNOTSUPP here in case it is defined.
+ * Warn if not.
+ */
+ char name[IFNAMSIZ];
+ int err;
+
+ err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
+ WARN_ON(err != -EOPNOTSUPP);
+ }
+ if (ops->ndo_get_port_parent_id) {
+ /* Some drivers use the same set of ndos for netdevs
+ * that have devlink_port registered and also for
+ * those who don't. Make sure that ndo_get_port_parent_id
+ * returns -EOPNOTSUPP here in case it is defined.
+ * Warn if not.
+ */
+ struct netdev_phys_item_id ppid;
+ int err;
+
+ err = ops->ndo_get_port_parent_id(netdev, &ppid);
+ WARN_ON(err != -EOPNOTSUPP);
+ }
+}
+
+static void __devlink_port_type_set(struct devlink_port *devlink_port,
+ enum devlink_port_type type,
+ void *type_dev)
+{
+ struct net_device *netdev = type_dev;
+
+ ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);
+
+ if (type == DEVLINK_PORT_TYPE_NOTSET) {
+ devlink_port_type_warn_schedule(devlink_port);
+ } else {
+ devlink_port_type_warn_cancel(devlink_port);
+ if (type == DEVLINK_PORT_TYPE_ETH && netdev)
+ devlink_port_type_netdev_checks(devlink_port, netdev);
+ }
+
+ spin_lock_bh(&devlink_port->type_lock);
+ devlink_port->type = type;
+ switch (type) {
+ case DEVLINK_PORT_TYPE_ETH:
+ devlink_port->type_eth.netdev = netdev;
+ if (netdev) {
+ ASSERT_RTNL();
+ devlink_port->type_eth.ifindex = netdev->ifindex;
+ BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) !=
+ sizeof(netdev->name));
+ strcpy(devlink_port->type_eth.ifname, netdev->name);
+ }
+ break;
+ case DEVLINK_PORT_TYPE_IB:
+ devlink_port->type_ib.ibdev = type_dev;
+ break;
+ default:
+ break;
+ }
+ spin_unlock_bh(&devlink_port->type_lock);
+ devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
+}
+
+/**
+ * devlink_port_type_eth_set - Set port type to Ethernet
+ *
+ * @devlink_port: devlink port
+ *
+ * If driver is calling this, most likely it is doing something wrong.
+ */
+void devlink_port_type_eth_set(struct devlink_port *devlink_port)
+{
+ dev_warn(devlink_port->devlink->dev,
+ "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n",
+ devlink_port->index);
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL);
+}
+EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
+
+/**
+ * devlink_port_type_ib_set - Set port type to InfiniBand
+ *
+ * @devlink_port: devlink port
+ * @ibdev: related IB device
+ */
+void devlink_port_type_ib_set(struct devlink_port *devlink_port,
+ struct ib_device *ibdev)
+{
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
+}
+EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
+
+/**
+ * devlink_port_type_clear - Clear port type
+ *
+ * @devlink_port: devlink port
+ *
+ * If driver is calling this for clearing Ethernet type, most likely
+ * it is doing something wrong.
+ */
+void devlink_port_type_clear(struct devlink_port *devlink_port)
+{
+ if (devlink_port->type == DEVLINK_PORT_TYPE_ETH)
+ dev_warn(devlink_port->devlink->dev,
+ "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n",
+ devlink_port->index);
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
+}
+EXPORT_SYMBOL_GPL(devlink_port_type_clear);
+
+int devlink_port_netdevice_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
+ struct devlink_port *devlink_port = netdev->devlink_port;
+ struct devlink *devlink;
+
+ devlink = container_of(nb, struct devlink, netdevice_nb);
+
+ if (!devlink_port || devlink_port->devlink != devlink)
+ return NOTIFY_OK;
+
+ switch (event) {
+ case NETDEV_POST_INIT:
+ /* Set the type but not netdev pointer. It is going to be set
+ * later on by NETDEV_REGISTER event. Happens once during
+ * netdevice register
+ */
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH,
+ NULL);
+ break;
+ case NETDEV_REGISTER:
+ case NETDEV_CHANGENAME:
++ if (devlink_net(devlink) != dev_net(netdev))
++ return NOTIFY_OK;
+ /* Set the netdev on top of previously set type. Note this
+ * event happens also during net namespace change so here
+ * we take into account netdev pointer appearing in this
+ * namespace.
+ */
+ __devlink_port_type_set(devlink_port, devlink_port->type,
+ netdev);
+ break;
+ case NETDEV_UNREGISTER:
++ if (devlink_net(devlink) != dev_net(netdev))
++ return NOTIFY_OK;
+ /* Clear netdev pointer, but not the type. This event happens
+ * also during net namespace change so we need to clear
+ * pointer to netdev that is going to another net namespace.
+ */
+ __devlink_port_type_set(devlink_port, devlink_port->type,
+ NULL);
+ break;
+ case NETDEV_PRE_UNINIT:
+ /* Clear the type and the netdev pointer. Happens one during
+ * netdevice unregister.
+ */
+ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET,
+ NULL);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
+ enum devlink_port_flavour flavour)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+
+ devlink_port->attrs_set = true;
+ attrs->flavour = flavour;
+ if (attrs->switch_id.id_len) {
+ devlink_port->switch_port = true;
+ if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN))
+ attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN;
+ } else {
+ devlink_port->switch_port = false;
+ }
+ return 0;
+}
+
+/**
+ * devlink_port_attrs_set - Set port attributes
+ *
+ * @devlink_port: devlink port
+ * @attrs: devlink port attrs
+ */
+void devlink_port_attrs_set(struct devlink_port *devlink_port,
+ struct devlink_port_attrs *attrs)
+{
+ int ret;
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ devlink_port->attrs = *attrs;
+ ret = __devlink_port_attrs_set(devlink_port, attrs->flavour);
+ if (ret)
+ return;
+ WARN_ON(attrs->splittable && attrs->split);
+}
+EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
+
+/**
+ * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
+ *
+ * @devlink_port: devlink port
+ * @controller: associated controller number for the devlink port instance
+ * @pf: associated PF for the devlink port instance
+ * @external: indicates if the port is for an external controller
+ */
+void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller,
+ u16 pf, bool external)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+ int ret;
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ ret = __devlink_port_attrs_set(devlink_port,
+ DEVLINK_PORT_FLAVOUR_PCI_PF);
+ if (ret)
+ return;
+ attrs->pci_pf.controller = controller;
+ attrs->pci_pf.pf = pf;
+ attrs->pci_pf.external = external;
+}
+EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
+
+/**
+ * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
+ *
+ * @devlink_port: devlink port
+ * @controller: associated controller number for the devlink port instance
+ * @pf: associated PF for the devlink port instance
+ * @vf: associated VF of a PF for the devlink port instance
+ * @external: indicates if the port is for an external controller
+ */
+void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller,
+ u16 pf, u16 vf, bool external)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+ int ret;
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ ret = __devlink_port_attrs_set(devlink_port,
+ DEVLINK_PORT_FLAVOUR_PCI_VF);
+ if (ret)
+ return;
+ attrs->pci_vf.controller = controller;
+ attrs->pci_vf.pf = pf;
+ attrs->pci_vf.vf = vf;
+ attrs->pci_vf.external = external;
+}
+EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
+
+/**
+ * devlink_port_attrs_pci_sf_set - Set PCI SF port attributes
+ *
+ * @devlink_port: devlink port
+ * @controller: associated controller number for the devlink port instance
+ * @pf: associated PF for the devlink port instance
+ * @sf: associated SF of a PF for the devlink port instance
+ * @external: indicates if the port is for an external controller
+ */
+void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller,
+ u16 pf, u32 sf, bool external)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+ int ret;
+
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ ret = __devlink_port_attrs_set(devlink_port,
+ DEVLINK_PORT_FLAVOUR_PCI_SF);
+ if (ret)
+ return;
+ attrs->pci_sf.controller = controller;
+ attrs->pci_sf.pf = pf;
+ attrs->pci_sf.sf = sf;
+ attrs->pci_sf.external = external;
+}
+EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set);
+
+/**
+ * devl_rate_node_create - create devlink rate node
+ * @devlink: devlink instance
+ * @priv: driver private data
+ * @node_name: name of the resulting node
+ * @parent: parent devlink_rate struct
+ *
+ * Create devlink rate object of type node
+ */
+struct devlink_rate *
+devl_rate_node_create(struct devlink *devlink, void *priv, char *node_name,
+ struct devlink_rate *parent)
+{
+ struct devlink_rate *rate_node;
+
+ rate_node = devlink_rate_node_get_by_name(devlink, node_name);
+ if (!IS_ERR(rate_node))
+ return ERR_PTR(-EEXIST);
+
+ rate_node = kzalloc(sizeof(*rate_node), GFP_KERNEL);
+ if (!rate_node)
+ return ERR_PTR(-ENOMEM);
+
+ if (parent) {
+ rate_node->parent = parent;
+ refcount_inc(&rate_node->parent->refcnt);
+ }
+
+ rate_node->type = DEVLINK_RATE_TYPE_NODE;
+ rate_node->devlink = devlink;
+ rate_node->priv = priv;
+
+ rate_node->name = kstrdup(node_name, GFP_KERNEL);
+ if (!rate_node->name) {
+ kfree(rate_node);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ refcount_set(&rate_node->refcnt, 1);
+ list_add(&rate_node->list, &devlink->rate_list);
+ devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_NEW);
+ return rate_node;
+}
+EXPORT_SYMBOL_GPL(devl_rate_node_create);
+
+/**
+ * devl_rate_leaf_create - create devlink rate leaf
+ * @devlink_port: devlink port object to create rate object on
+ * @priv: driver private data
+ * @parent: parent devlink_rate struct
+ *
+ * Create devlink rate object of type leaf on provided @devlink_port.
+ */
+int devl_rate_leaf_create(struct devlink_port *devlink_port, void *priv,
+ struct devlink_rate *parent)
+{
+ struct devlink *devlink = devlink_port->devlink;
+ struct devlink_rate *devlink_rate;
+
+ devl_assert_locked(devlink_port->devlink);
+
+ if (WARN_ON(devlink_port->devlink_rate))
+ return -EBUSY;
+
+ devlink_rate = kzalloc(sizeof(*devlink_rate), GFP_KERNEL);
+ if (!devlink_rate)
+ return -ENOMEM;
+
+ if (parent) {
+ devlink_rate->parent = parent;
+ refcount_inc(&devlink_rate->parent->refcnt);
+ }
+
+ devlink_rate->type = DEVLINK_RATE_TYPE_LEAF;
+ devlink_rate->devlink = devlink;
+ devlink_rate->devlink_port = devlink_port;
+ devlink_rate->priv = priv;
+ list_add_tail(&devlink_rate->list, &devlink->rate_list);
+ devlink_port->devlink_rate = devlink_rate;
+ devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_NEW);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devl_rate_leaf_create);
+
+/**
+ * devl_rate_leaf_destroy - destroy devlink rate leaf
+ *
+ * @devlink_port: devlink port linked to the rate object
+ *
+ * Destroy the devlink rate object of type leaf on provided @devlink_port.
+ */
+void devl_rate_leaf_destroy(struct devlink_port *devlink_port)
+{
+ struct devlink_rate *devlink_rate = devlink_port->devlink_rate;
+
+ devl_assert_locked(devlink_port->devlink);
+ if (!devlink_rate)
+ return;
+
+ devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_DEL);
+ if (devlink_rate->parent)
+ refcount_dec(&devlink_rate->parent->refcnt);
+ list_del(&devlink_rate->list);
+ devlink_port->devlink_rate = NULL;
+ kfree(devlink_rate);
+}
+EXPORT_SYMBOL_GPL(devl_rate_leaf_destroy);
+
+/**
+ * devl_rate_nodes_destroy - destroy all devlink rate nodes on device
+ * @devlink: devlink instance
+ *
+ * Unset parent for all rate objects and destroy all rate nodes
+ * on specified device.
+ */
+void devl_rate_nodes_destroy(struct devlink *devlink)
+{
+ static struct devlink_rate *devlink_rate, *tmp;
+ const struct devlink_ops *ops = devlink->ops;
+
+ devl_assert_locked(devlink);
+
+ list_for_each_entry(devlink_rate, &devlink->rate_list, list) {
+ if (!devlink_rate->parent)
+ continue;
+
+ refcount_dec(&devlink_rate->parent->refcnt);
+ if (devlink_rate_is_leaf(devlink_rate))
+ ops->rate_leaf_parent_set(devlink_rate, NULL, devlink_rate->priv,
+ NULL, NULL);
+ else if (devlink_rate_is_node(devlink_rate))
+ ops->rate_node_parent_set(devlink_rate, NULL, devlink_rate->priv,
+ NULL, NULL);
+ }
+ list_for_each_entry_safe(devlink_rate, tmp, &devlink->rate_list, list) {
+ if (devlink_rate_is_node(devlink_rate)) {
+ ops->rate_node_del(devlink_rate, devlink_rate->priv, NULL);
+ list_del(&devlink_rate->list);
+ kfree(devlink_rate->name);
+ kfree(devlink_rate);
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(devl_rate_nodes_destroy);
+
+/**
+ * devlink_port_linecard_set - Link port with a linecard
+ *
+ * @devlink_port: devlink port
+ * @linecard: devlink linecard
+ */
+void devlink_port_linecard_set(struct devlink_port *devlink_port,
+ struct devlink_linecard *linecard)
+{
+ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
+
+ devlink_port->linecard = linecard;
+}
+EXPORT_SYMBOL_GPL(devlink_port_linecard_set);
+
+static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
+ char *name, size_t len)
+{
+ struct devlink_port_attrs *attrs = &devlink_port->attrs;
+ int n = 0;
+
+ if (!devlink_port->attrs_set)
+ return -EOPNOTSUPP;
+
+ switch (attrs->flavour) {
+ case DEVLINK_PORT_FLAVOUR_PHYSICAL:
+ if (devlink_port->linecard)
+ n = snprintf(name, len, "l%u",
+ devlink_port->linecard->index);
+ if (n < len)
+ n += snprintf(name + n, len - n, "p%u",
+ attrs->phys.port_number);
+ if (n < len && attrs->split)
+ n += snprintf(name + n, len - n, "s%u",
+ attrs->phys.split_subport_number);
+ break;
+ case DEVLINK_PORT_FLAVOUR_CPU:
+ case DEVLINK_PORT_FLAVOUR_DSA:
+ case DEVLINK_PORT_FLAVOUR_UNUSED:
+ /* As CPU and DSA ports do not have a netdevice associated
+ * case should not ever happen.
+ */
+ WARN_ON(1);
+ return -EINVAL;
+ case DEVLINK_PORT_FLAVOUR_PCI_PF:
+ if (attrs->pci_pf.external) {
+ n = snprintf(name, len, "c%u", attrs->pci_pf.controller);
+ if (n >= len)
+ return -EINVAL;
+ len -= n;
+ name += n;
+ }
+ n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
+ break;
+ case DEVLINK_PORT_FLAVOUR_PCI_VF:
+ if (attrs->pci_vf.external) {
+ n = snprintf(name, len, "c%u", attrs->pci_vf.controller);
+ if (n >= len)
+ return -EINVAL;
+ len -= n;
+ name += n;
+ }
+ n = snprintf(name, len, "pf%uvf%u",
+ attrs->pci_vf.pf, attrs->pci_vf.vf);
+ break;
+ case DEVLINK_PORT_FLAVOUR_PCI_SF:
+ if (attrs->pci_sf.external) {
+ n = snprintf(name, len, "c%u", attrs->pci_sf.controller);
+ if (n >= len)
+ return -EINVAL;
+ len -= n;
+ name += n;
+ }
+ n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf,
+ attrs->pci_sf.sf);
+ break;
+ case DEVLINK_PORT_FLAVOUR_VIRTUAL:
+ return -EOPNOTSUPP;
+ }
+
+ if (n >= len)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int devlink_linecard_types_init(struct devlink_linecard *linecard)
+{
+ struct devlink_linecard_type *linecard_type;
+ unsigned int count;
+ int i;
+
+ count = linecard->ops->types_count(linecard, linecard->priv);
+ linecard->types = kmalloc_array(count, sizeof(*linecard_type),
+ GFP_KERNEL);
+ if (!linecard->types)
+ return -ENOMEM;
+ linecard->types_count = count;
+
+ for (i = 0; i < count; i++) {
+ linecard_type = &linecard->types[i];
+ linecard->ops->types_get(linecard, linecard->priv, i,
+ &linecard_type->type,
+ &linecard_type->priv);
+ }
+ return 0;
+}
+
+static void devlink_linecard_types_fini(struct devlink_linecard *linecard)
+{
+ kfree(linecard->types);
+}
+
+/**
+ * devl_linecard_create - Create devlink linecard
+ *
+ * @devlink: devlink
+ * @linecard_index: driver-specific numerical identifier of the linecard
+ * @ops: linecards ops
+ * @priv: user priv pointer
+ *
+ * Create devlink linecard instance with provided linecard index.
+ * Caller can use any indexing, even hw-related one.
+ *
+ * Return: Line card structure or an ERR_PTR() encoded error code.
+ */
+struct devlink_linecard *
+devl_linecard_create(struct devlink *devlink, unsigned int linecard_index,
+ const struct devlink_linecard_ops *ops, void *priv)
+{
+ struct devlink_linecard *linecard;
+ int err;
+
+ if (WARN_ON(!ops || !ops->provision || !ops->unprovision ||
+ !ops->types_count || !ops->types_get))
+ return ERR_PTR(-EINVAL);
+
+ if (devlink_linecard_index_exists(devlink, linecard_index))
+ return ERR_PTR(-EEXIST);
+
+ linecard = kzalloc(sizeof(*linecard), GFP_KERNEL);
+ if (!linecard)
+ return ERR_PTR(-ENOMEM);
+
+ linecard->devlink = devlink;
+ linecard->index = linecard_index;
+ linecard->ops = ops;
+ linecard->priv = priv;
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ mutex_init(&linecard->state_lock);
+
+ err = devlink_linecard_types_init(linecard);
+ if (err) {
+ mutex_destroy(&linecard->state_lock);
+ kfree(linecard);
+ return ERR_PTR(err);
+ }
+
+ list_add_tail(&linecard->list, &devlink->linecard_list);
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ return linecard;
+}
+EXPORT_SYMBOL_GPL(devl_linecard_create);
+
+/**
+ * devl_linecard_destroy - Destroy devlink linecard
+ *
+ * @linecard: devlink linecard
+ */
+void devl_linecard_destroy(struct devlink_linecard *linecard)
+{
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
+ list_del(&linecard->list);
+ devlink_linecard_types_fini(linecard);
+ mutex_destroy(&linecard->state_lock);
+ kfree(linecard);
+}
+EXPORT_SYMBOL_GPL(devl_linecard_destroy);
+
+/**
+ * devlink_linecard_provision_set - Set provisioning on linecard
+ *
+ * @linecard: devlink linecard
+ * @type: linecard type
+ *
+ * This is either called directly from the provision() op call or
+ * as a result of the provision() op call asynchronously.
+ */
+void devlink_linecard_provision_set(struct devlink_linecard *linecard,
+ const char *type)
+{
+ mutex_lock(&linecard->state_lock);
+ WARN_ON(linecard->type && strcmp(linecard->type, type));
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
+ linecard->type = type;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_provision_set);
+
+/**
+ * devlink_linecard_provision_clear - Clear provisioning on linecard
+ *
+ * @linecard: devlink linecard
+ *
+ * This is either called directly from the unprovision() op call or
+ * as a result of the unprovision() op call asynchronously.
+ */
+void devlink_linecard_provision_clear(struct devlink_linecard *linecard)
+{
+ mutex_lock(&linecard->state_lock);
+ WARN_ON(linecard->nested_devlink);
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ linecard->type = NULL;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_provision_clear);
+
+/**
+ * devlink_linecard_provision_fail - Fail provisioning on linecard
+ *
+ * @linecard: devlink linecard
+ *
+ * This is either called directly from the provision() op call or
+ * as a result of the provision() op call asynchronously.
+ */
+void devlink_linecard_provision_fail(struct devlink_linecard *linecard)
+{
+ mutex_lock(&linecard->state_lock);
+ WARN_ON(linecard->nested_devlink);
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING_FAILED;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_provision_fail);
+
+/**
+ * devlink_linecard_activate - Set linecard active
+ *
+ * @linecard: devlink linecard
+ */
+void devlink_linecard_activate(struct devlink_linecard *linecard)
+{
+ mutex_lock(&linecard->state_lock);
+ WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_PROVISIONED);
+ linecard->state = DEVLINK_LINECARD_STATE_ACTIVE;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_activate);
+
+/**
+ * devlink_linecard_deactivate - Set linecard inactive
+ *
+ * @linecard: devlink linecard
+ */
+void devlink_linecard_deactivate(struct devlink_linecard *linecard)
+{
+ mutex_lock(&linecard->state_lock);
+ switch (linecard->state) {
+ case DEVLINK_LINECARD_STATE_ACTIVE:
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ break;
+ case DEVLINK_LINECARD_STATE_UNPROVISIONING:
+ /* Line card is being deactivated as part
+ * of unprovisioning flow.
+ */
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_deactivate);
+
+/**
+ * devlink_linecard_nested_dl_set - Attach/detach nested devlink
+ * instance to linecard.
+ *
+ * @linecard: devlink linecard
+ * @nested_devlink: devlink instance to attach or NULL to detach
+ */
+void devlink_linecard_nested_dl_set(struct devlink_linecard *linecard,
+ struct devlink *nested_devlink)
+{
+ mutex_lock(&linecard->state_lock);
+ linecard->nested_devlink = nested_devlink;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ mutex_unlock(&linecard->state_lock);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_nested_dl_set);
+
+int devl_sb_register(struct devlink *devlink, unsigned int sb_index,
+ u32 size, u16 ingress_pools_count,
+ u16 egress_pools_count, u16 ingress_tc_count,
+ u16 egress_tc_count)
+{
+ struct devlink_sb *devlink_sb;
+
+ lockdep_assert_held(&devlink->lock);
+
+ if (devlink_sb_index_exists(devlink, sb_index))
+ return -EEXIST;
+
+ devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
+ if (!devlink_sb)
+ return -ENOMEM;
+ devlink_sb->index = sb_index;
+ devlink_sb->size = size;
+ devlink_sb->ingress_pools_count = ingress_pools_count;
+ devlink_sb->egress_pools_count = egress_pools_count;
+ devlink_sb->ingress_tc_count = ingress_tc_count;
+ devlink_sb->egress_tc_count = egress_tc_count;
+ list_add_tail(&devlink_sb->list, &devlink->sb_list);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devl_sb_register);
+
+int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
+ u32 size, u16 ingress_pools_count,
+ u16 egress_pools_count, u16 ingress_tc_count,
+ u16 egress_tc_count)
+{
+ int err;
+
+ devl_lock(devlink);
+ err = devl_sb_register(devlink, sb_index, size, ingress_pools_count,
+ egress_pools_count, ingress_tc_count,
+ egress_tc_count);
+ devl_unlock(devlink);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_sb_register);
+
+void devl_sb_unregister(struct devlink *devlink, unsigned int sb_index)
+{
+ struct devlink_sb *devlink_sb;
+
+ lockdep_assert_held(&devlink->lock);
+
+ devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
+ WARN_ON(!devlink_sb);
+ list_del(&devlink_sb->list);
+ kfree(devlink_sb);
+}
+EXPORT_SYMBOL_GPL(devl_sb_unregister);
+
+void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
+{
+ devl_lock(devlink);
+ devl_sb_unregister(devlink, sb_index);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_sb_unregister);
+
+/**
+ * devl_dpipe_headers_register - register dpipe headers
+ *
+ * @devlink: devlink
+ * @dpipe_headers: dpipe header array
+ *
+ * Register the headers supported by hardware.
+ */
+void devl_dpipe_headers_register(struct devlink *devlink,
+ struct devlink_dpipe_headers *dpipe_headers)
+{
+ lockdep_assert_held(&devlink->lock);
+
+ devlink->dpipe_headers = dpipe_headers;
+}
+EXPORT_SYMBOL_GPL(devl_dpipe_headers_register);
+
+/**
+ * devl_dpipe_headers_unregister - unregister dpipe headers
+ *
+ * @devlink: devlink
+ *
+ * Unregister the headers supported by hardware.
+ */
+void devl_dpipe_headers_unregister(struct devlink *devlink)
+{
+ lockdep_assert_held(&devlink->lock);
+
+ devlink->dpipe_headers = NULL;
+}
+EXPORT_SYMBOL_GPL(devl_dpipe_headers_unregister);
+
+/**
+ * devlink_dpipe_table_counter_enabled - check if counter allocation
+ * required
+ * @devlink: devlink
+ * @table_name: tables name
+ *
+ * Used by driver to check if counter allocation is required.
+ * After counter allocation is turned on the table entries
+ * are updated to include counter statistics.
+ *
+ * After that point on the driver must respect the counter
+ * state so that each entry added to the table is added
+ * with a counter.
+ */
+bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
+ const char *table_name)
+{
+ struct devlink_dpipe_table *table;
+ bool enabled;
+
+ rcu_read_lock();
+ table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
+ table_name, devlink);
+ enabled = false;
+ if (table)
+ enabled = table->counters_enabled;
+ rcu_read_unlock();
+ return enabled;
+}
+EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
+
+/**
+ * devl_dpipe_table_register - register dpipe table
+ *
+ * @devlink: devlink
+ * @table_name: table name
+ * @table_ops: table ops
+ * @priv: priv
+ * @counter_control_extern: external control for counters
+ */
+int devl_dpipe_table_register(struct devlink *devlink,
+ const char *table_name,
+ struct devlink_dpipe_table_ops *table_ops,
+ void *priv, bool counter_control_extern)
+{
+ struct devlink_dpipe_table *table;
+
+ lockdep_assert_held(&devlink->lock);
+
+ if (WARN_ON(!table_ops->size_get))
+ return -EINVAL;
+
+ if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name,
+ devlink))
+ return -EEXIST;
+
+ table = kzalloc(sizeof(*table), GFP_KERNEL);
+ if (!table)
+ return -ENOMEM;
+
+ table->name = table_name;
+ table->table_ops = table_ops;
+ table->priv = priv;
+ table->counter_control_extern = counter_control_extern;
+
+ list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devl_dpipe_table_register);
+
+/**
+ * devl_dpipe_table_unregister - unregister dpipe table
+ *
+ * @devlink: devlink
+ * @table_name: table name
+ */
+void devl_dpipe_table_unregister(struct devlink *devlink,
+ const char *table_name)
+{
+ struct devlink_dpipe_table *table;
+
+ lockdep_assert_held(&devlink->lock);
+
+ table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
+ table_name, devlink);
+ if (!table)
+ return;
+ list_del_rcu(&table->list);
+ kfree_rcu(table, rcu);
+}
+EXPORT_SYMBOL_GPL(devl_dpipe_table_unregister);
+
+/**
+ * devl_resource_register - devlink resource register
+ *
+ * @devlink: devlink
+ * @resource_name: resource's name
+ * @resource_size: resource's size
+ * @resource_id: resource's id
+ * @parent_resource_id: resource's parent id
+ * @size_params: size parameters
+ *
+ * Generic resources should reuse the same names across drivers.
+ * Please see the generic resources list at:
+ * Documentation/networking/devlink/devlink-resource.rst
+ */
+int devl_resource_register(struct devlink *devlink,
+ const char *resource_name,
+ u64 resource_size,
+ u64 resource_id,
+ u64 parent_resource_id,
+ const struct devlink_resource_size_params *size_params)
+{
+ struct devlink_resource *resource;
+ struct list_head *resource_list;
+ bool top_hierarchy;
+
+ lockdep_assert_held(&devlink->lock);
+
+ top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
+
+ resource = devlink_resource_find(devlink, NULL, resource_id);
+ if (resource)
+ return -EINVAL;
+
+ resource = kzalloc(sizeof(*resource), GFP_KERNEL);
+ if (!resource)
+ return -ENOMEM;
+
+ if (top_hierarchy) {
+ resource_list = &devlink->resource_list;
+ } else {
+ struct devlink_resource *parent_resource;
+
+ parent_resource = devlink_resource_find(devlink, NULL,
+ parent_resource_id);
+ if (parent_resource) {
+ resource_list = &parent_resource->resource_list;
+ resource->parent = parent_resource;
+ } else {
+ kfree(resource);
+ return -EINVAL;
+ }
+ }
+
+ resource->name = resource_name;
+ resource->size = resource_size;
+ resource->size_new = resource_size;
+ resource->id = resource_id;
+ resource->size_valid = true;
+ memcpy(&resource->size_params, size_params,
+ sizeof(resource->size_params));
+ INIT_LIST_HEAD(&resource->resource_list);
+ list_add_tail(&resource->list, resource_list);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devl_resource_register);
+
+/**
+ * devlink_resource_register - devlink resource register
+ *
+ * @devlink: devlink
+ * @resource_name: resource's name
+ * @resource_size: resource's size
+ * @resource_id: resource's id
+ * @parent_resource_id: resource's parent id
+ * @size_params: size parameters
+ *
+ * Generic resources should reuse the same names across drivers.
+ * Please see the generic resources list at:
+ * Documentation/networking/devlink/devlink-resource.rst
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+int devlink_resource_register(struct devlink *devlink,
+ const char *resource_name,
+ u64 resource_size,
+ u64 resource_id,
+ u64 parent_resource_id,
+ const struct devlink_resource_size_params *size_params)
+{
+ int err;
+
+ devl_lock(devlink);
+ err = devl_resource_register(devlink, resource_name, resource_size,
+ resource_id, parent_resource_id, size_params);
+ devl_unlock(devlink);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_resource_register);
+
+static void devlink_resource_unregister(struct devlink *devlink,
+ struct devlink_resource *resource)
+{
+ struct devlink_resource *tmp, *child_resource;
+
+ list_for_each_entry_safe(child_resource, tmp, &resource->resource_list,
+ list) {
+ devlink_resource_unregister(devlink, child_resource);
+ list_del(&child_resource->list);
+ kfree(child_resource);
+ }
+}
+
+/**
+ * devl_resources_unregister - free all resources
+ *
+ * @devlink: devlink
+ */
+void devl_resources_unregister(struct devlink *devlink)
+{
+ struct devlink_resource *tmp, *child_resource;
+
+ lockdep_assert_held(&devlink->lock);
+
+ list_for_each_entry_safe(child_resource, tmp, &devlink->resource_list,
+ list) {
+ devlink_resource_unregister(devlink, child_resource);
+ list_del(&child_resource->list);
+ kfree(child_resource);
+ }
+}
+EXPORT_SYMBOL_GPL(devl_resources_unregister);
+
+/**
+ * devlink_resources_unregister - free all resources
+ *
+ * @devlink: devlink
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_resources_unregister(struct devlink *devlink)
+{
+ devl_lock(devlink);
+ devl_resources_unregister(devlink);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_resources_unregister);
+
+/**
+ * devl_resource_size_get - get and update size
+ *
+ * @devlink: devlink
+ * @resource_id: the requested resource id
+ * @p_resource_size: ptr to update
+ */
+int devl_resource_size_get(struct devlink *devlink,
+ u64 resource_id,
+ u64 *p_resource_size)
+{
+ struct devlink_resource *resource;
+
+ lockdep_assert_held(&devlink->lock);
+
+ resource = devlink_resource_find(devlink, NULL, resource_id);
+ if (!resource)
+ return -EINVAL;
+ *p_resource_size = resource->size_new;
+ resource->size = resource->size_new;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devl_resource_size_get);
+
+/**
+ * devl_dpipe_table_resource_set - set the resource id
+ *
+ * @devlink: devlink
+ * @table_name: table name
+ * @resource_id: resource id
+ * @resource_units: number of resource's units consumed per table's entry
+ */
+int devl_dpipe_table_resource_set(struct devlink *devlink,
+ const char *table_name, u64 resource_id,
+ u64 resource_units)
+{
+ struct devlink_dpipe_table *table;
+
+ table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
+ table_name, devlink);
+ if (!table)
+ return -EINVAL;
+
+ table->resource_id = resource_id;
+ table->resource_units = resource_units;
+ table->resource_valid = true;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devl_dpipe_table_resource_set);
+
+/**
+ * devl_resource_occ_get_register - register occupancy getter
+ *
+ * @devlink: devlink
+ * @resource_id: resource id
+ * @occ_get: occupancy getter callback
+ * @occ_get_priv: occupancy getter callback priv
+ */
+void devl_resource_occ_get_register(struct devlink *devlink,
+ u64 resource_id,
+ devlink_resource_occ_get_t *occ_get,
+ void *occ_get_priv)
+{
+ struct devlink_resource *resource;
+
+ lockdep_assert_held(&devlink->lock);
+
+ resource = devlink_resource_find(devlink, NULL, resource_id);
+ if (WARN_ON(!resource))
+ return;
+ WARN_ON(resource->occ_get);
+
+ resource->occ_get = occ_get;
+ resource->occ_get_priv = occ_get_priv;
+}
+EXPORT_SYMBOL_GPL(devl_resource_occ_get_register);
+
+/**
+ * devlink_resource_occ_get_register - register occupancy getter
+ *
+ * @devlink: devlink
+ * @resource_id: resource id
+ * @occ_get: occupancy getter callback
+ * @occ_get_priv: occupancy getter callback priv
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_resource_occ_get_register(struct devlink *devlink,
+ u64 resource_id,
+ devlink_resource_occ_get_t *occ_get,
+ void *occ_get_priv)
+{
+ devl_lock(devlink);
+ devl_resource_occ_get_register(devlink, resource_id,
+ occ_get, occ_get_priv);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
+
+/**
+ * devl_resource_occ_get_unregister - unregister occupancy getter
+ *
+ * @devlink: devlink
+ * @resource_id: resource id
+ */
+void devl_resource_occ_get_unregister(struct devlink *devlink,
+ u64 resource_id)
+{
+ struct devlink_resource *resource;
+
+ lockdep_assert_held(&devlink->lock);
+
+ resource = devlink_resource_find(devlink, NULL, resource_id);
+ if (WARN_ON(!resource))
+ return;
+ WARN_ON(!resource->occ_get);
+
+ resource->occ_get = NULL;
+ resource->occ_get_priv = NULL;
+}
+EXPORT_SYMBOL_GPL(devl_resource_occ_get_unregister);
+
+/**
+ * devlink_resource_occ_get_unregister - unregister occupancy getter
+ *
+ * @devlink: devlink
+ * @resource_id: resource id
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_resource_occ_get_unregister(struct devlink *devlink,
+ u64 resource_id)
+{
+ devl_lock(devlink);
+ devl_resource_occ_get_unregister(devlink, resource_id);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
+
+static int devlink_param_verify(const struct devlink_param *param)
+{
+ if (!param || !param->name || !param->supported_cmodes)
+ return -EINVAL;
+ if (param->generic)
+ return devlink_param_generic_verify(param);
+ else
+ return devlink_param_driver_verify(param);
+}
+
+static int devlink_param_register(struct devlink *devlink,
+ const struct devlink_param *param)
+{
+ struct devlink_param_item *param_item;
+
+ WARN_ON(devlink_param_verify(param));
+ WARN_ON(devlink_param_find_by_name(&devlink->param_list, param->name));
+
+ if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
+ WARN_ON(param->get || param->set);
+ else
+ WARN_ON(!param->get || !param->set);
+
+ param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
+ if (!param_item)
+ return -ENOMEM;
+
+ param_item->param = param;
+
+ list_add_tail(¶m_item->list, &devlink->param_list);
+ devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
+ return 0;
+}
+
+static void devlink_param_unregister(struct devlink *devlink,
+ const struct devlink_param *param)
+{
+ struct devlink_param_item *param_item;
+
+ param_item =
+ devlink_param_find_by_name(&devlink->param_list, param->name);
+ if (WARN_ON(!param_item))
+ return;
+ devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_DEL);
+ list_del(¶m_item->list);
+ kfree(param_item);
+}
+
+/**
+ * devl_params_register - register configuration parameters
+ *
+ * @devlink: devlink
+ * @params: configuration parameters array
+ * @params_count: number of parameters provided
+ *
+ * Register the configuration parameters supported by the driver.
+ */
+int devl_params_register(struct devlink *devlink,
+ const struct devlink_param *params,
+ size_t params_count)
+{
+ const struct devlink_param *param = params;
+ int i, err;
+
+ lockdep_assert_held(&devlink->lock);
+
+ for (i = 0; i < params_count; i++, param++) {
+ err = devlink_param_register(devlink, param);
+ if (err)
+ goto rollback;
+ }
+ return 0;
+
+rollback:
+ if (!i)
+ return err;
+
+ for (param--; i > 0; i--, param--)
+ devlink_param_unregister(devlink, param);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devl_params_register);
+
+int devlink_params_register(struct devlink *devlink,
+ const struct devlink_param *params,
+ size_t params_count)
+{
+ int err;
+
+ devl_lock(devlink);
+ err = devl_params_register(devlink, params, params_count);
+ devl_unlock(devlink);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_params_register);
+
+/**
+ * devl_params_unregister - unregister configuration parameters
+ * @devlink: devlink
+ * @params: configuration parameters to unregister
+ * @params_count: number of parameters provided
+ */
+void devl_params_unregister(struct devlink *devlink,
+ const struct devlink_param *params,
+ size_t params_count)
+{
+ const struct devlink_param *param = params;
+ int i;
+
+ lockdep_assert_held(&devlink->lock);
+
+ for (i = 0; i < params_count; i++, param++)
+ devlink_param_unregister(devlink, param);
+}
+EXPORT_SYMBOL_GPL(devl_params_unregister);
+
+void devlink_params_unregister(struct devlink *devlink,
+ const struct devlink_param *params,
+ size_t params_count)
+{
+ devl_lock(devlink);
+ devl_params_unregister(devlink, params, params_count);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_params_unregister);
+
+/**
+ * devl_param_driverinit_value_get - get configuration parameter
+ * value for driver initializing
+ *
+ * @devlink: devlink
+ * @param_id: parameter ID
+ * @init_val: value of parameter in driverinit configuration mode
+ *
+ * This function should be used by the driver to get driverinit
+ * configuration for initialization after reload command.
+ */
+int devl_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
+ union devlink_param_value *init_val)
+{
+ struct devlink_param_item *param_item;
+
+ lockdep_assert_held(&devlink->lock);
+
+ if (WARN_ON(!devlink_reload_supported(devlink->ops)))
+ return -EOPNOTSUPP;
+
+ param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
+ if (!param_item)
+ return -EINVAL;
+
+ if (!param_item->driverinit_value_valid)
+ return -EOPNOTSUPP;
+
+ if (WARN_ON(!devlink_param_cmode_is_supported(param_item->param,
+ DEVLINK_PARAM_CMODE_DRIVERINIT)))
+ return -EOPNOTSUPP;
+
+ if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
+ strcpy(init_val->vstr, param_item->driverinit_value.vstr);
+ else
+ *init_val = param_item->driverinit_value;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devl_param_driverinit_value_get);
+
+/**
+ * devl_param_driverinit_value_set - set value of configuration
+ * parameter for driverinit
+ * configuration mode
+ *
+ * @devlink: devlink
+ * @param_id: parameter ID
+ * @init_val: value of parameter to set for driverinit configuration mode
+ *
+ * This function should be used by the driver to set driverinit
+ * configuration mode default value.
+ */
+void devl_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
+ union devlink_param_value init_val)
+{
+ struct devlink_param_item *param_item;
+
+ param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
+ if (WARN_ON(!param_item))
+ return;
+
+ if (WARN_ON(!devlink_param_cmode_is_supported(param_item->param,
+ DEVLINK_PARAM_CMODE_DRIVERINIT)))
+ return;
+
+ if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
+ strcpy(param_item->driverinit_value.vstr, init_val.vstr);
+ else
+ param_item->driverinit_value = init_val;
+ param_item->driverinit_value_valid = true;
+
+ devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
+}
+EXPORT_SYMBOL_GPL(devl_param_driverinit_value_set);
+
+/**
+ * devl_param_value_changed - notify devlink on a parameter's value
+ * change. Should be called by the driver
+ * right after the change.
+ *
+ * @devlink: devlink
+ * @param_id: parameter ID
+ *
+ * This function should be used by the driver to notify devlink on value
+ * change, excluding driverinit configuration mode.
+ * For driverinit configuration mode driver should use the function
+ */
+void devl_param_value_changed(struct devlink *devlink, u32 param_id)
+{
+ struct devlink_param_item *param_item;
+
+ param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
+ WARN_ON(!param_item);
+
+ devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
+}
+EXPORT_SYMBOL_GPL(devl_param_value_changed);
+
+/**
+ * devl_region_create - create a new address region
+ *
+ * @devlink: devlink
+ * @ops: region operations and name
+ * @region_max_snapshots: Maximum supported number of snapshots for region
+ * @region_size: size of region
+ */
+struct devlink_region *devl_region_create(struct devlink *devlink,
+ const struct devlink_region_ops *ops,
+ u32 region_max_snapshots,
+ u64 region_size)
+{
+ struct devlink_region *region;
+
+ devl_assert_locked(devlink);
+
+ if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
+ return ERR_PTR(-EINVAL);
+
+ if (devlink_region_get_by_name(devlink, ops->name))
+ return ERR_PTR(-EEXIST);
+
+ region = kzalloc(sizeof(*region), GFP_KERNEL);
+ if (!region)
+ return ERR_PTR(-ENOMEM);
+
+ region->devlink = devlink;
+ region->max_snapshots = region_max_snapshots;
+ region->ops = ops;
+ region->size = region_size;
+ INIT_LIST_HEAD(®ion->snapshot_list);
+ mutex_init(®ion->snapshot_lock);
+ list_add_tail(®ion->list, &devlink->region_list);
+ devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
+
+ return region;
+}
+EXPORT_SYMBOL_GPL(devl_region_create);
+
+/**
+ * devlink_region_create - create a new address region
+ *
+ * @devlink: devlink
+ * @ops: region operations and name
+ * @region_max_snapshots: Maximum supported number of snapshots for region
+ * @region_size: size of region
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+struct devlink_region *
+devlink_region_create(struct devlink *devlink,
+ const struct devlink_region_ops *ops,
+ u32 region_max_snapshots, u64 region_size)
+{
+ struct devlink_region *region;
+
+ devl_lock(devlink);
+ region = devl_region_create(devlink, ops, region_max_snapshots,
+ region_size);
+ devl_unlock(devlink);
+ return region;
+}
+EXPORT_SYMBOL_GPL(devlink_region_create);
+
+/**
+ * devlink_port_region_create - create a new address region for a port
+ *
+ * @port: devlink port
+ * @ops: region operations and name
+ * @region_max_snapshots: Maximum supported number of snapshots for region
+ * @region_size: size of region
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+struct devlink_region *
+devlink_port_region_create(struct devlink_port *port,
+ const struct devlink_port_region_ops *ops,
+ u32 region_max_snapshots, u64 region_size)
+{
+ struct devlink *devlink = port->devlink;
+ struct devlink_region *region;
+ int err = 0;
+
+ ASSERT_DEVLINK_PORT_INITIALIZED(port);
+
+ if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
+ return ERR_PTR(-EINVAL);
+
+ devl_lock(devlink);
+
+ if (devlink_port_region_get_by_name(port, ops->name)) {
+ err = -EEXIST;
+ goto unlock;
+ }
+
+ region = kzalloc(sizeof(*region), GFP_KERNEL);
+ if (!region) {
+ err = -ENOMEM;
+ goto unlock;
+ }
+
+ region->devlink = devlink;
+ region->port = port;
+ region->max_snapshots = region_max_snapshots;
+ region->port_ops = ops;
+ region->size = region_size;
+ INIT_LIST_HEAD(®ion->snapshot_list);
+ mutex_init(®ion->snapshot_lock);
+ list_add_tail(®ion->list, &port->region_list);
+ devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
+
+ devl_unlock(devlink);
+ return region;
+
+unlock:
+ devl_unlock(devlink);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(devlink_port_region_create);
+
+/**
+ * devl_region_destroy - destroy address region
+ *
+ * @region: devlink region to destroy
+ */
+void devl_region_destroy(struct devlink_region *region)
+{
+ struct devlink *devlink = region->devlink;
+ struct devlink_snapshot *snapshot, *ts;
+
+ devl_assert_locked(devlink);
+
+ /* Free all snapshots of region */
+ mutex_lock(®ion->snapshot_lock);
+ list_for_each_entry_safe(snapshot, ts, ®ion->snapshot_list, list)
+ devlink_region_snapshot_del(region, snapshot);
+ mutex_unlock(®ion->snapshot_lock);
+
+ list_del(®ion->list);
+ mutex_destroy(®ion->snapshot_lock);
+
+ devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
+ kfree(region);
+}
+EXPORT_SYMBOL_GPL(devl_region_destroy);
+
+/**
+ * devlink_region_destroy - destroy address region
+ *
+ * @region: devlink region to destroy
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_region_destroy(struct devlink_region *region)
+{
+ struct devlink *devlink = region->devlink;
+
+ devl_lock(devlink);
+ devl_region_destroy(region);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_region_destroy);
+
+/**
+ * devlink_region_snapshot_id_get - get snapshot ID
+ *
+ * This callback should be called when adding a new snapshot,
+ * Driver should use the same id for multiple snapshots taken
+ * on multiple regions at the same time/by the same trigger.
+ *
+ * The caller of this function must use devlink_region_snapshot_id_put
+ * when finished creating regions using this id.
+ *
+ * Returns zero on success, or a negative error code on failure.
+ *
+ * @devlink: devlink
+ * @id: storage to return id
+ */
+int devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
+{
+ return __devlink_region_snapshot_id_get(devlink, id);
+}
+EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
+
+/**
+ * devlink_region_snapshot_id_put - put snapshot ID reference
+ *
+ * This should be called by a driver after finishing creating snapshots
+ * with an id. Doing so ensures that the ID can later be released in the
+ * event that all snapshots using it have been destroyed.
+ *
+ * @devlink: devlink
+ * @id: id to release reference on
+ */
+void devlink_region_snapshot_id_put(struct devlink *devlink, u32 id)
+{
+ __devlink_snapshot_id_decrement(devlink, id);
+}
+EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_put);
+
+/**
+ * devlink_region_snapshot_create - create a new snapshot
+ * This will add a new snapshot of a region. The snapshot
+ * will be stored on the region struct and can be accessed
+ * from devlink. This is useful for future analyses of snapshots.
+ * Multiple snapshots can be created on a region.
+ * The @snapshot_id should be obtained using the getter function.
+ *
+ * @region: devlink region of the snapshot
+ * @data: snapshot data
+ * @snapshot_id: snapshot id to be created
+ */
+int devlink_region_snapshot_create(struct devlink_region *region,
+ u8 *data, u32 snapshot_id)
+{
+ int err;
+
+ mutex_lock(®ion->snapshot_lock);
+ err = __devlink_region_snapshot_create(region, data, snapshot_id);
+ mutex_unlock(®ion->snapshot_lock);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
+
+#define DEVLINK_TRAP(_id, _type) \
+ { \
+ .type = DEVLINK_TRAP_TYPE_##_type, \
+ .id = DEVLINK_TRAP_GENERIC_ID_##_id, \
+ .name = DEVLINK_TRAP_GENERIC_NAME_##_id, \
+ }
+
+static const struct devlink_trap devlink_trap_generic[] = {
+ DEVLINK_TRAP(SMAC_MC, DROP),
+ DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
+ DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
+ DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
+ DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
+ DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
+ DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
+ DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
+ DEVLINK_TRAP(TAIL_DROP, DROP),
+ DEVLINK_TRAP(NON_IP_PACKET, DROP),
+ DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
+ DEVLINK_TRAP(DIP_LB, DROP),
+ DEVLINK_TRAP(SIP_MC, DROP),
+ DEVLINK_TRAP(SIP_LB, DROP),
+ DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
+ DEVLINK_TRAP(IPV4_SIP_BC, DROP),
+ DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
+ DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
+ DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
+ DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
+ DEVLINK_TRAP(RPF, EXCEPTION),
+ DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
+ DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
+ DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
+ DEVLINK_TRAP(NON_ROUTABLE, DROP),
+ DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
+ DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
+ DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP),
+ DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP),
+ DEVLINK_TRAP(STP, CONTROL),
+ DEVLINK_TRAP(LACP, CONTROL),
+ DEVLINK_TRAP(LLDP, CONTROL),
+ DEVLINK_TRAP(IGMP_QUERY, CONTROL),
+ DEVLINK_TRAP(IGMP_V1_REPORT, CONTROL),
+ DEVLINK_TRAP(IGMP_V2_REPORT, CONTROL),
+ DEVLINK_TRAP(IGMP_V3_REPORT, CONTROL),
+ DEVLINK_TRAP(IGMP_V2_LEAVE, CONTROL),
+ DEVLINK_TRAP(MLD_QUERY, CONTROL),
+ DEVLINK_TRAP(MLD_V1_REPORT, CONTROL),
+ DEVLINK_TRAP(MLD_V2_REPORT, CONTROL),
+ DEVLINK_TRAP(MLD_V1_DONE, CONTROL),
+ DEVLINK_TRAP(IPV4_DHCP, CONTROL),
+ DEVLINK_TRAP(IPV6_DHCP, CONTROL),
+ DEVLINK_TRAP(ARP_REQUEST, CONTROL),
+ DEVLINK_TRAP(ARP_RESPONSE, CONTROL),
+ DEVLINK_TRAP(ARP_OVERLAY, CONTROL),
+ DEVLINK_TRAP(IPV6_NEIGH_SOLICIT, CONTROL),
+ DEVLINK_TRAP(IPV6_NEIGH_ADVERT, CONTROL),
+ DEVLINK_TRAP(IPV4_BFD, CONTROL),
+ DEVLINK_TRAP(IPV6_BFD, CONTROL),
+ DEVLINK_TRAP(IPV4_OSPF, CONTROL),
+ DEVLINK_TRAP(IPV6_OSPF, CONTROL),
+ DEVLINK_TRAP(IPV4_BGP, CONTROL),
+ DEVLINK_TRAP(IPV6_BGP, CONTROL),
+ DEVLINK_TRAP(IPV4_VRRP, CONTROL),
+ DEVLINK_TRAP(IPV6_VRRP, CONTROL),
+ DEVLINK_TRAP(IPV4_PIM, CONTROL),
+ DEVLINK_TRAP(IPV6_PIM, CONTROL),
+ DEVLINK_TRAP(UC_LB, CONTROL),
+ DEVLINK_TRAP(LOCAL_ROUTE, CONTROL),
+ DEVLINK_TRAP(EXTERNAL_ROUTE, CONTROL),
+ DEVLINK_TRAP(IPV6_UC_DIP_LINK_LOCAL_SCOPE, CONTROL),
+ DEVLINK_TRAP(IPV6_DIP_ALL_NODES, CONTROL),
+ DEVLINK_TRAP(IPV6_DIP_ALL_ROUTERS, CONTROL),
+ DEVLINK_TRAP(IPV6_ROUTER_SOLICIT, CONTROL),
+ DEVLINK_TRAP(IPV6_ROUTER_ADVERT, CONTROL),
+ DEVLINK_TRAP(IPV6_REDIRECT, CONTROL),
+ DEVLINK_TRAP(IPV4_ROUTER_ALERT, CONTROL),
+ DEVLINK_TRAP(IPV6_ROUTER_ALERT, CONTROL),
+ DEVLINK_TRAP(PTP_EVENT, CONTROL),
+ DEVLINK_TRAP(PTP_GENERAL, CONTROL),
+ DEVLINK_TRAP(FLOW_ACTION_SAMPLE, CONTROL),
+ DEVLINK_TRAP(FLOW_ACTION_TRAP, CONTROL),
+ DEVLINK_TRAP(EARLY_DROP, DROP),
+ DEVLINK_TRAP(VXLAN_PARSING, DROP),
+ DEVLINK_TRAP(LLC_SNAP_PARSING, DROP),
+ DEVLINK_TRAP(VLAN_PARSING, DROP),
+ DEVLINK_TRAP(PPPOE_PPP_PARSING, DROP),
+ DEVLINK_TRAP(MPLS_PARSING, DROP),
+ DEVLINK_TRAP(ARP_PARSING, DROP),
+ DEVLINK_TRAP(IP_1_PARSING, DROP),
+ DEVLINK_TRAP(IP_N_PARSING, DROP),
+ DEVLINK_TRAP(GRE_PARSING, DROP),
+ DEVLINK_TRAP(UDP_PARSING, DROP),
+ DEVLINK_TRAP(TCP_PARSING, DROP),
+ DEVLINK_TRAP(IPSEC_PARSING, DROP),
+ DEVLINK_TRAP(SCTP_PARSING, DROP),
+ DEVLINK_TRAP(DCCP_PARSING, DROP),
+ DEVLINK_TRAP(GTP_PARSING, DROP),
+ DEVLINK_TRAP(ESP_PARSING, DROP),
+ DEVLINK_TRAP(BLACKHOLE_NEXTHOP, DROP),
+ DEVLINK_TRAP(DMAC_FILTER, DROP),
+ DEVLINK_TRAP(EAPOL, CONTROL),
+ DEVLINK_TRAP(LOCKED_PORT, DROP),
+};
+
+#define DEVLINK_TRAP_GROUP(_id) \
+ { \
+ .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \
+ .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \
+ }
+
+static const struct devlink_trap_group devlink_trap_group_generic[] = {
+ DEVLINK_TRAP_GROUP(L2_DROPS),
+ DEVLINK_TRAP_GROUP(L3_DROPS),
+ DEVLINK_TRAP_GROUP(L3_EXCEPTIONS),
+ DEVLINK_TRAP_GROUP(BUFFER_DROPS),
+ DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
+ DEVLINK_TRAP_GROUP(ACL_DROPS),
+ DEVLINK_TRAP_GROUP(STP),
+ DEVLINK_TRAP_GROUP(LACP),
+ DEVLINK_TRAP_GROUP(LLDP),
+ DEVLINK_TRAP_GROUP(MC_SNOOPING),
+ DEVLINK_TRAP_GROUP(DHCP),
+ DEVLINK_TRAP_GROUP(NEIGH_DISCOVERY),
+ DEVLINK_TRAP_GROUP(BFD),
+ DEVLINK_TRAP_GROUP(OSPF),
+ DEVLINK_TRAP_GROUP(BGP),
+ DEVLINK_TRAP_GROUP(VRRP),
+ DEVLINK_TRAP_GROUP(PIM),
+ DEVLINK_TRAP_GROUP(UC_LB),
+ DEVLINK_TRAP_GROUP(LOCAL_DELIVERY),
+ DEVLINK_TRAP_GROUP(EXTERNAL_DELIVERY),
+ DEVLINK_TRAP_GROUP(IPV6),
+ DEVLINK_TRAP_GROUP(PTP_EVENT),
+ DEVLINK_TRAP_GROUP(PTP_GENERAL),
+ DEVLINK_TRAP_GROUP(ACL_SAMPLE),
+ DEVLINK_TRAP_GROUP(ACL_TRAP),
+ DEVLINK_TRAP_GROUP(PARSER_ERROR_DROPS),
+ DEVLINK_TRAP_GROUP(EAPOL),
+};
+
+static int devlink_trap_generic_verify(const struct devlink_trap *trap)
+{
+ if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
+ return -EINVAL;
+
+ if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
+ return -EINVAL;
+
+ if (trap->type != devlink_trap_generic[trap->id].type)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int devlink_trap_driver_verify(const struct devlink_trap *trap)
+{
+ int i;
+
+ if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
+ if (!strcmp(trap->name, devlink_trap_generic[i].name))
+ return -EEXIST;
+ }
+
+ return 0;
+}
+
+static int devlink_trap_verify(const struct devlink_trap *trap)
+{
+ if (!trap || !trap->name)
+ return -EINVAL;
+
+ if (trap->generic)
+ return devlink_trap_generic_verify(trap);
+ else
+ return devlink_trap_driver_verify(trap);
+}
+
+static int
+devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
+{
+ if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
+ return -EINVAL;
+
+ if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int
+devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
+{
+ int i;
+
+ if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
+ if (!strcmp(group->name, devlink_trap_group_generic[i].name))
+ return -EEXIST;
+ }
+
+ return 0;
+}
+
+static int devlink_trap_group_verify(const struct devlink_trap_group *group)
+{
+ if (group->generic)
+ return devlink_trap_group_generic_verify(group);
+ else
+ return devlink_trap_group_driver_verify(group);
+}
+
+static void
+devlink_trap_group_notify(struct devlink *devlink,
+ const struct devlink_trap_group_item *group_item,
+ enum devlink_command cmd)
+{
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
+ cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
+ if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
+ 0);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
+ msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static int
+devlink_trap_item_group_link(struct devlink *devlink,
+ struct devlink_trap_item *trap_item)
+{
+ u16 group_id = trap_item->trap->init_group_id;
+ struct devlink_trap_group_item *group_item;
+
+ group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id);
+ if (WARN_ON_ONCE(!group_item))
+ return -EINVAL;
+
+ trap_item->group_item = group_item;
+
+ return 0;
+}
+
+static void devlink_trap_notify(struct devlink *devlink,
+ const struct devlink_trap_item *trap_item,
+ enum devlink_command cmd)
+{
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
+ cmd != DEVLINK_CMD_TRAP_DEL);
+ if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
+ msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static int
+devlink_trap_register(struct devlink *devlink,
+ const struct devlink_trap *trap, void *priv)
+{
+ struct devlink_trap_item *trap_item;
+ int err;
+
+ if (devlink_trap_item_lookup(devlink, trap->name))
+ return -EEXIST;
+
+ trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
+ if (!trap_item)
+ return -ENOMEM;
+
+ trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
+ if (!trap_item->stats) {
+ err = -ENOMEM;
+ goto err_stats_alloc;
+ }
+
+ trap_item->trap = trap;
+ trap_item->action = trap->init_action;
+ trap_item->priv = priv;
+
+ err = devlink_trap_item_group_link(devlink, trap_item);
+ if (err)
+ goto err_group_link;
+
+ err = devlink->ops->trap_init(devlink, trap, trap_item);
+ if (err)
+ goto err_trap_init;
+
+ list_add_tail(&trap_item->list, &devlink->trap_list);
+ devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
+
+ return 0;
+
+err_trap_init:
+err_group_link:
+ free_percpu(trap_item->stats);
+err_stats_alloc:
+ kfree(trap_item);
+ return err;
+}
+
+static void devlink_trap_unregister(struct devlink *devlink,
+ const struct devlink_trap *trap)
+{
+ struct devlink_trap_item *trap_item;
+
+ trap_item = devlink_trap_item_lookup(devlink, trap->name);
+ if (WARN_ON_ONCE(!trap_item))
+ return;
+
+ devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
+ list_del(&trap_item->list);
+ if (devlink->ops->trap_fini)
+ devlink->ops->trap_fini(devlink, trap, trap_item);
+ free_percpu(trap_item->stats);
+ kfree(trap_item);
+}
+
+static void devlink_trap_disable(struct devlink *devlink,
+ const struct devlink_trap *trap)
+{
+ struct devlink_trap_item *trap_item;
+
+ trap_item = devlink_trap_item_lookup(devlink, trap->name);
+ if (WARN_ON_ONCE(!trap_item))
+ return;
+
+ devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP,
+ NULL);
+ trap_item->action = DEVLINK_TRAP_ACTION_DROP;
+}
+
+/**
+ * devl_traps_register - Register packet traps with devlink.
+ * @devlink: devlink.
+ * @traps: Packet traps.
+ * @traps_count: Count of provided packet traps.
+ * @priv: Driver private information.
+ *
+ * Return: Non-zero value on failure.
+ */
+int devl_traps_register(struct devlink *devlink,
+ const struct devlink_trap *traps,
+ size_t traps_count, void *priv)
+{
+ int i, err;
+
+ if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
+ return -EINVAL;
+
+ devl_assert_locked(devlink);
+ for (i = 0; i < traps_count; i++) {
+ const struct devlink_trap *trap = &traps[i];
+
+ err = devlink_trap_verify(trap);
+ if (err)
+ goto err_trap_verify;
+
+ err = devlink_trap_register(devlink, trap, priv);
+ if (err)
+ goto err_trap_register;
+ }
+
+ return 0;
+
+err_trap_register:
+err_trap_verify:
+ for (i--; i >= 0; i--)
+ devlink_trap_unregister(devlink, &traps[i]);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devl_traps_register);
+
+/**
+ * devlink_traps_register - Register packet traps with devlink.
+ * @devlink: devlink.
+ * @traps: Packet traps.
+ * @traps_count: Count of provided packet traps.
+ * @priv: Driver private information.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ *
+ * Return: Non-zero value on failure.
+ */
+int devlink_traps_register(struct devlink *devlink,
+ const struct devlink_trap *traps,
+ size_t traps_count, void *priv)
+{
+ int err;
+
+ devl_lock(devlink);
+ err = devl_traps_register(devlink, traps, traps_count, priv);
+ devl_unlock(devlink);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_traps_register);
+
+/**
+ * devl_traps_unregister - Unregister packet traps from devlink.
+ * @devlink: devlink.
+ * @traps: Packet traps.
+ * @traps_count: Count of provided packet traps.
+ */
+void devl_traps_unregister(struct devlink *devlink,
+ const struct devlink_trap *traps,
+ size_t traps_count)
+{
+ int i;
+
+ devl_assert_locked(devlink);
+ /* Make sure we do not have any packets in-flight while unregistering
+ * traps by disabling all of them and waiting for a grace period.
+ */
+ for (i = traps_count - 1; i >= 0; i--)
+ devlink_trap_disable(devlink, &traps[i]);
+ synchronize_rcu();
+ for (i = traps_count - 1; i >= 0; i--)
+ devlink_trap_unregister(devlink, &traps[i]);
+}
+EXPORT_SYMBOL_GPL(devl_traps_unregister);
+
+/**
+ * devlink_traps_unregister - Unregister packet traps from devlink.
+ * @devlink: devlink.
+ * @traps: Packet traps.
+ * @traps_count: Count of provided packet traps.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_traps_unregister(struct devlink *devlink,
+ const struct devlink_trap *traps,
+ size_t traps_count)
+{
+ devl_lock(devlink);
+ devl_traps_unregister(devlink, traps, traps_count);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_traps_unregister);
+
+static void
+devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
+ size_t skb_len)
+{
+ struct devlink_stats *stats;
+
+ stats = this_cpu_ptr(trap_stats);
+ u64_stats_update_begin(&stats->syncp);
+ u64_stats_add(&stats->rx_bytes, skb_len);
+ u64_stats_inc(&stats->rx_packets);
+ u64_stats_update_end(&stats->syncp);
+}
+
+static void
+devlink_trap_report_metadata_set(struct devlink_trap_metadata *metadata,
+ const struct devlink_trap_item *trap_item,
+ struct devlink_port *in_devlink_port,
+ const struct flow_action_cookie *fa_cookie)
+{
+ metadata->trap_name = trap_item->trap->name;
+ metadata->trap_group_name = trap_item->group_item->group->name;
+ metadata->fa_cookie = fa_cookie;
+ metadata->trap_type = trap_item->trap->type;
+
+ spin_lock(&in_devlink_port->type_lock);
+ if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
+ metadata->input_dev = in_devlink_port->type_eth.netdev;
+ spin_unlock(&in_devlink_port->type_lock);
+}
+
+/**
+ * devlink_trap_report - Report trapped packet to drop monitor.
+ * @devlink: devlink.
+ * @skb: Trapped packet.
+ * @trap_ctx: Trap context.
+ * @in_devlink_port: Input devlink port.
+ * @fa_cookie: Flow action cookie. Could be NULL.
+ */
+void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
+ void *trap_ctx, struct devlink_port *in_devlink_port,
+ const struct flow_action_cookie *fa_cookie)
+
+{
+ struct devlink_trap_item *trap_item = trap_ctx;
+
+ devlink_trap_stats_update(trap_item->stats, skb->len);
+ devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
+
+ if (trace_devlink_trap_report_enabled()) {
+ struct devlink_trap_metadata metadata = {};
+
+ devlink_trap_report_metadata_set(&metadata, trap_item,
+ in_devlink_port, fa_cookie);
+ trace_devlink_trap_report(devlink, skb, &metadata);
+ }
+}
+EXPORT_SYMBOL_GPL(devlink_trap_report);
+
+/**
+ * devlink_trap_ctx_priv - Trap context to driver private information.
+ * @trap_ctx: Trap context.
+ *
+ * Return: Driver private information passed during registration.
+ */
+void *devlink_trap_ctx_priv(void *trap_ctx)
+{
+ struct devlink_trap_item *trap_item = trap_ctx;
+
+ return trap_item->priv;
+}
+EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
+
+static int
+devlink_trap_group_item_policer_link(struct devlink *devlink,
+ struct devlink_trap_group_item *group_item)
+{
+ u32 policer_id = group_item->group->init_policer_id;
+ struct devlink_trap_policer_item *policer_item;
+
+ if (policer_id == 0)
+ return 0;
+
+ policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
+ if (WARN_ON_ONCE(!policer_item))
+ return -EINVAL;
+
+ group_item->policer_item = policer_item;
+
+ return 0;
+}
+
+static int
+devlink_trap_group_register(struct devlink *devlink,
+ const struct devlink_trap_group *group)
+{
+ struct devlink_trap_group_item *group_item;
+ int err;
+
+ if (devlink_trap_group_item_lookup(devlink, group->name))
+ return -EEXIST;
+
+ group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
+ if (!group_item)
+ return -ENOMEM;
+
+ group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
+ if (!group_item->stats) {
+ err = -ENOMEM;
+ goto err_stats_alloc;
+ }
+
+ group_item->group = group;
+
+ err = devlink_trap_group_item_policer_link(devlink, group_item);
+ if (err)
+ goto err_policer_link;
+
+ if (devlink->ops->trap_group_init) {
+ err = devlink->ops->trap_group_init(devlink, group);
+ if (err)
+ goto err_group_init;
+ }
+
+ list_add_tail(&group_item->list, &devlink->trap_group_list);
+ devlink_trap_group_notify(devlink, group_item,
+ DEVLINK_CMD_TRAP_GROUP_NEW);
+
+ return 0;
+
+err_group_init:
+err_policer_link:
+ free_percpu(group_item->stats);
+err_stats_alloc:
+ kfree(group_item);
+ return err;
+}
+
+static void
+devlink_trap_group_unregister(struct devlink *devlink,
+ const struct devlink_trap_group *group)
+{
+ struct devlink_trap_group_item *group_item;
+
+ group_item = devlink_trap_group_item_lookup(devlink, group->name);
+ if (WARN_ON_ONCE(!group_item))
+ return;
+
+ devlink_trap_group_notify(devlink, group_item,
+ DEVLINK_CMD_TRAP_GROUP_DEL);
+ list_del(&group_item->list);
+ free_percpu(group_item->stats);
+ kfree(group_item);
+}
+
+/**
+ * devl_trap_groups_register - Register packet trap groups with devlink.
+ * @devlink: devlink.
+ * @groups: Packet trap groups.
+ * @groups_count: Count of provided packet trap groups.
+ *
+ * Return: Non-zero value on failure.
+ */
+int devl_trap_groups_register(struct devlink *devlink,
+ const struct devlink_trap_group *groups,
+ size_t groups_count)
+{
+ int i, err;
+
+ devl_assert_locked(devlink);
+ for (i = 0; i < groups_count; i++) {
+ const struct devlink_trap_group *group = &groups[i];
+
+ err = devlink_trap_group_verify(group);
+ if (err)
+ goto err_trap_group_verify;
+
+ err = devlink_trap_group_register(devlink, group);
+ if (err)
+ goto err_trap_group_register;
+ }
+
+ return 0;
+
+err_trap_group_register:
+err_trap_group_verify:
+ for (i--; i >= 0; i--)
+ devlink_trap_group_unregister(devlink, &groups[i]);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devl_trap_groups_register);
+
+/**
+ * devlink_trap_groups_register - Register packet trap groups with devlink.
+ * @devlink: devlink.
+ * @groups: Packet trap groups.
+ * @groups_count: Count of provided packet trap groups.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ *
+ * Return: Non-zero value on failure.
+ */
+int devlink_trap_groups_register(struct devlink *devlink,
+ const struct devlink_trap_group *groups,
+ size_t groups_count)
+{
+ int err;
+
+ devl_lock(devlink);
+ err = devl_trap_groups_register(devlink, groups, groups_count);
+ devl_unlock(devlink);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_trap_groups_register);
+
+/**
+ * devl_trap_groups_unregister - Unregister packet trap groups from devlink.
+ * @devlink: devlink.
+ * @groups: Packet trap groups.
+ * @groups_count: Count of provided packet trap groups.
+ */
+void devl_trap_groups_unregister(struct devlink *devlink,
+ const struct devlink_trap_group *groups,
+ size_t groups_count)
+{
+ int i;
+
+ devl_assert_locked(devlink);
+ for (i = groups_count - 1; i >= 0; i--)
+ devlink_trap_group_unregister(devlink, &groups[i]);
+}
+EXPORT_SYMBOL_GPL(devl_trap_groups_unregister);
+
+/**
+ * devlink_trap_groups_unregister - Unregister packet trap groups from devlink.
+ * @devlink: devlink.
+ * @groups: Packet trap groups.
+ * @groups_count: Count of provided packet trap groups.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_trap_groups_unregister(struct devlink *devlink,
+ const struct devlink_trap_group *groups,
+ size_t groups_count)
+{
+ devl_lock(devlink);
+ devl_trap_groups_unregister(devlink, groups, groups_count);
+ devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister);
+
+static void
+devlink_trap_policer_notify(struct devlink *devlink,
+ const struct devlink_trap_policer_item *policer_item,
+ enum devlink_command cmd)
+{
+ struct sk_buff *msg;
+ int err;
+
+ WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
+ cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
+ if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
+ return;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0,
+ 0, 0);
+ if (err) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
+ msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static int
+devlink_trap_policer_register(struct devlink *devlink,
+ const struct devlink_trap_policer *policer)
+{
+ struct devlink_trap_policer_item *policer_item;
+ int err;
+
+ if (devlink_trap_policer_item_lookup(devlink, policer->id))
+ return -EEXIST;
+
+ policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL);
+ if (!policer_item)
+ return -ENOMEM;
+
+ policer_item->policer = policer;
+ policer_item->rate = policer->init_rate;
+ policer_item->burst = policer->init_burst;
+
+ if (devlink->ops->trap_policer_init) {
+ err = devlink->ops->trap_policer_init(devlink, policer);
+ if (err)
+ goto err_policer_init;
+ }
+
+ list_add_tail(&policer_item->list, &devlink->trap_policer_list);
+ devlink_trap_policer_notify(devlink, policer_item,
+ DEVLINK_CMD_TRAP_POLICER_NEW);
+
+ return 0;
+
+err_policer_init:
+ kfree(policer_item);
+ return err;
+}
+
+static void
+devlink_trap_policer_unregister(struct devlink *devlink,
+ const struct devlink_trap_policer *policer)
+{
+ struct devlink_trap_policer_item *policer_item;
+
+ policer_item = devlink_trap_policer_item_lookup(devlink, policer->id);
+ if (WARN_ON_ONCE(!policer_item))
+ return;
+
+ devlink_trap_policer_notify(devlink, policer_item,
+ DEVLINK_CMD_TRAP_POLICER_DEL);
+ list_del(&policer_item->list);
+ if (devlink->ops->trap_policer_fini)
+ devlink->ops->trap_policer_fini(devlink, policer);
+ kfree(policer_item);
+}
+
+/**
+ * devl_trap_policers_register - Register packet trap policers with devlink.
+ * @devlink: devlink.
+ * @policers: Packet trap policers.
+ * @policers_count: Count of provided packet trap policers.
+ *
+ * Return: Non-zero value on failure.
+ */
+int
+devl_trap_policers_register(struct devlink *devlink,
+ const struct devlink_trap_policer *policers,
+ size_t policers_count)
+{
+ int i, err;
+
+ devl_assert_locked(devlink);
+ for (i = 0; i < policers_count; i++) {
+ const struct devlink_trap_policer *policer = &policers[i];
+
+ if (WARN_ON(policer->id == 0 ||
+ policer->max_rate < policer->min_rate ||
+ policer->max_burst < policer->min_burst)) {
+ err = -EINVAL;
+ goto err_trap_policer_verify;
+ }
+
+ err = devlink_trap_policer_register(devlink, policer);
+ if (err)
+ goto err_trap_policer_register;
+ }
+ return 0;
+
+err_trap_policer_register:
+err_trap_policer_verify:
+ for (i--; i >= 0; i--)
+ devlink_trap_policer_unregister(devlink, &policers[i]);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devl_trap_policers_register);
+
+/**
+ * devl_trap_policers_unregister - Unregister packet trap policers from devlink.
+ * @devlink: devlink.
+ * @policers: Packet trap policers.
+ * @policers_count: Count of provided packet trap policers.
+ */
+void
+devl_trap_policers_unregister(struct devlink *devlink,
+ const struct devlink_trap_policer *policers,
+ size_t policers_count)
+{
+ int i;
+
+ devl_assert_locked(devlink);
+ for (i = policers_count - 1; i >= 0; i--)
+ devlink_trap_policer_unregister(devlink, &policers[i]);
+}
+EXPORT_SYMBOL_GPL(devl_trap_policers_unregister);
+
+int devlink_compat_phys_port_name_get(struct net_device *dev,
+ char *name, size_t len)
+{
+ struct devlink_port *devlink_port;
+
+ /* RTNL mutex is held here which ensures that devlink_port
+ * instance cannot disappear in the middle. No need to take
+ * any devlink lock as only permanent values are accessed.
+ */
+ ASSERT_RTNL();
+
+ devlink_port = dev->devlink_port;
+ if (!devlink_port)
+ return -EOPNOTSUPP;
+
+ return __devlink_port_phys_port_name_get(devlink_port, name, len);
+}
+
+int devlink_compat_switch_id_get(struct net_device *dev,
+ struct netdev_phys_item_id *ppid)
+{
+ struct devlink_port *devlink_port;
+
+ /* Caller must hold RTNL mutex or reference to dev, which ensures that
+ * devlink_port instance cannot disappear in the middle. No need to take
+ * any devlink lock as only permanent values are accessed.
+ */
+ devlink_port = dev->devlink_port;
+ if (!devlink_port || !devlink_port->switch_port)
+ return -EOPNOTSUPP;
+
+ memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
+
+ return 0;
+}
projects / platform / kernel / linux-rpi.git / commitdiff