rocker: add support for phys_port_name

Implement the phys_port_name operation. Port names are pulled from the
rocker hardware model in qemu and default to the qemu name + port id.
e.g.,

sw1p1: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 52:54:00:12:35:01  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

where 'sw1' comes from the qemu command line -device rocker,name=sw1, and
'p1' is port 1.

Patch is adapted from Scott's phys_port_id patch.

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
index 2511ae2..c9558e6 100644 (file)
--- a/drivers/net/ethernet/rocker/rocker.c
+++ b/drivers/net/ethernet/rocker/rocker.c
@@ -30,6 +30,7 @@
 #include <linux/if_vlan.h>
 #include <linux/if_bridge.h>
 #include <linux/bitops.h>
+#include <linux/ctype.h>
 #include <net/switchdev.h>
 #include <net/rtnetlink.h>
 #include <net/ip_fib.h>
@@ -1630,6 +1631,53 @@ rocker_cmd_get_port_settings_macaddr_proc(struct rocker *rocker,
        return 0;
 }
 
+struct port_name {
+       char *buf;
+       size_t len;
+};
+
+static int
+rocker_cmd_get_port_settings_phys_name_proc(struct rocker *rocker,
+                                           struct rocker_port *rocker_port,
+                                           struct rocker_desc_info *desc_info,
+                                           void *priv)
+{
+       struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
+       struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
+       struct port_name *name = priv;
+       struct rocker_tlv *attr;
+       size_t i, j, len;
+       char *str;
+
+       rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
+       if (!attrs[ROCKER_TLV_CMD_INFO])
+               return -EIO;
+
+       rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
+                               attrs[ROCKER_TLV_CMD_INFO]);
+       attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
+       if (!attr)
+               return -EIO;
+
+       len = min_t(size_t, rocker_tlv_len(attr), name->len);
+       str = rocker_tlv_data(attr);
+
+       /* make sure name only contains alphanumeric characters */
+       for (i = j = 0; i < len; ++i) {
+               if (isalnum(str[i])) {
+                       name->buf[j] = str[i];
+                       j++;
+               }
+       }
+
+       if (j == 0)
+               return -EIO;
+
+       name->buf[j] = '\0';
+
+       return 0;
+}
+
 static int
 rocker_cmd_set_port_settings_ethtool_prep(struct rocker *rocker,
                                          struct rocker_port *rocker_port,
@@ -4138,6 +4186,21 @@ static int rocker_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
                                       rocker_port->brport_flags, mask);
 }
 
+static int rocker_port_get_phys_port_name(struct net_device *dev,
+                                         char *buf, size_t len)
+{
+       struct rocker_port *rocker_port = netdev_priv(dev);
+       struct port_name name = { .buf = buf, .len = len };
+       int err;
+
+       err = rocker_cmd_exec(rocker_port->rocker, rocker_port,
+                             rocker_cmd_get_port_settings_prep, NULL,
+                             rocker_cmd_get_port_settings_phys_name_proc,
+                             &name, false);
+
+       return err ? -EOPNOTSUPP : 0;
+}
+
 static const struct net_device_ops rocker_port_netdev_ops = {
        .ndo_open                       = rocker_port_open,
        .ndo_stop                       = rocker_port_stop,
@@ -4150,6 +4213,7 @@ static const struct net_device_ops rocker_port_netdev_ops = {
        .ndo_fdb_dump                   = rocker_port_fdb_dump,
        .ndo_bridge_setlink             = rocker_port_bridge_setlink,
        .ndo_bridge_getlink             = rocker_port_bridge_getlink,
+       .ndo_get_phys_port_name         = rocker_port_get_phys_port_name,
 };
 
 /********************

diff --git a/drivers/net/ethernet/rocker/rocker.h b/drivers/net/ethernet/rocker/rocker.h
index 51e430d..a4e9591 100644 (file)
--- a/drivers/net/ethernet/rocker/rocker.h
+++ b/drivers/net/ethernet/rocker/rocker.h
@@ -158,6 +158,7 @@ enum {
        ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,           /* binary */
        ROCKER_TLV_CMD_PORT_SETTINGS_MODE,              /* u8 */
        ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,          /* u8 */
+       ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME,         /* binary */
 
        __ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
        ROCKER_TLV_CMD_PORT_SETTINGS_MAX =