2 * Copyright (c) 2018 Cumulus Networks. All rights reserved.
3 * Copyright (c) 2018 David Ahern <dsa@cumulusnetworks.com>
4 * Copyright (c) 2019 Mellanox Technologies. All rights reserved.
6 * This software is licensed under the GNU General License Version 2,
7 * June 1991 as shown in the file COPYING in the top-level directory of this
10 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
11 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
12 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
13 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
14 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
15 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
18 #include <linux/debugfs.h>
19 #include <linux/device.h>
20 #include <linux/etherdevice.h>
21 #include <linux/inet.h>
22 #include <linux/jiffies.h>
23 #include <linux/kernel.h>
24 #include <linux/list.h>
25 #include <linux/mutex.h>
26 #include <linux/random.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/workqueue.h>
29 #include <net/devlink.h>
31 #include <uapi/linux/devlink.h>
32 #include <uapi/linux/ip.h>
33 #include <uapi/linux/udp.h>
35 #include "netdevsim.h"
37 static struct dentry *nsim_dev_ddir;
39 #define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
41 static ssize_t nsim_dev_take_snapshot_write(struct file *file,
42 const char __user *data,
43 size_t count, loff_t *ppos)
45 struct nsim_dev *nsim_dev = file->private_data;
50 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
54 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
56 id = devlink_region_snapshot_id_get(priv_to_devlink(nsim_dev));
57 err = devlink_region_snapshot_create(nsim_dev->dummy_region,
58 dummy_data, id, kfree);
60 pr_err("Failed to create region snapshot\n");
68 static const struct file_operations nsim_dev_take_snapshot_fops = {
70 .write = nsim_dev_take_snapshot_write,
71 .llseek = generic_file_llseek,
74 static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
76 char dev_ddir_name[sizeof(DRV_NAME) + 10];
78 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
79 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
80 if (IS_ERR_OR_NULL(nsim_dev->ddir))
81 return PTR_ERR_OR_ZERO(nsim_dev->ddir) ?: -EINVAL;
82 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
83 if (IS_ERR_OR_NULL(nsim_dev->ports_ddir))
84 return PTR_ERR_OR_ZERO(nsim_dev->ports_ddir) ?: -EINVAL;
85 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
86 &nsim_dev->fw_update_status);
87 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
89 debugfs_create_bool("test1", 0600, nsim_dev->ddir,
91 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
95 &nsim_dev_take_snapshot_fops);
96 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
97 &nsim_dev->dont_allow_reload);
98 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
99 &nsim_dev->fail_reload);
103 static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
105 debugfs_remove_recursive(nsim_dev->ports_ddir);
106 debugfs_remove_recursive(nsim_dev->ddir);
109 static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
110 struct nsim_dev_port *nsim_dev_port)
112 char port_ddir_name[16];
113 char dev_link_name[32];
115 sprintf(port_ddir_name, "%u", nsim_dev_port->port_index);
116 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
117 nsim_dev->ports_ddir);
118 if (IS_ERR_OR_NULL(nsim_dev_port->ddir))
121 sprintf(dev_link_name, "../../../" DRV_NAME "%u",
122 nsim_dev->nsim_bus_dev->dev.id);
123 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
128 static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
130 debugfs_remove_recursive(nsim_dev_port->ddir);
133 static int nsim_dev_resources_register(struct devlink *devlink)
135 struct devlink_resource_size_params params = {
137 .size_granularity = 1,
138 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
142 /* Resources for IPv4 */
143 err = devlink_resource_register(devlink, "IPv4", (u64)-1,
145 DEVLINK_RESOURCE_ID_PARENT_TOP,
148 pr_err("Failed to register IPv4 top resource\n");
152 err = devlink_resource_register(devlink, "fib", (u64)-1,
153 NSIM_RESOURCE_IPV4_FIB,
154 NSIM_RESOURCE_IPV4, ¶ms);
156 pr_err("Failed to register IPv4 FIB resource\n");
160 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
161 NSIM_RESOURCE_IPV4_FIB_RULES,
162 NSIM_RESOURCE_IPV4, ¶ms);
164 pr_err("Failed to register IPv4 FIB rules resource\n");
168 /* Resources for IPv6 */
169 err = devlink_resource_register(devlink, "IPv6", (u64)-1,
171 DEVLINK_RESOURCE_ID_PARENT_TOP,
174 pr_err("Failed to register IPv6 top resource\n");
178 err = devlink_resource_register(devlink, "fib", (u64)-1,
179 NSIM_RESOURCE_IPV6_FIB,
180 NSIM_RESOURCE_IPV6, ¶ms);
182 pr_err("Failed to register IPv6 FIB resource\n");
186 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
187 NSIM_RESOURCE_IPV6_FIB_RULES,
188 NSIM_RESOURCE_IPV6, ¶ms);
190 pr_err("Failed to register IPv6 FIB rules resource\n");
198 enum nsim_devlink_param_id {
199 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
200 NSIM_DEVLINK_PARAM_ID_TEST1,
203 static const struct devlink_param nsim_devlink_params[] = {
204 DEVLINK_PARAM_GENERIC(MAX_MACS,
205 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
207 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
208 "test1", DEVLINK_PARAM_TYPE_BOOL,
209 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
213 static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
214 struct devlink *devlink)
216 union devlink_param_value value;
218 value.vu32 = nsim_dev->max_macs;
219 devlink_param_driverinit_value_set(devlink,
220 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
222 value.vbool = nsim_dev->test1;
223 devlink_param_driverinit_value_set(devlink,
224 NSIM_DEVLINK_PARAM_ID_TEST1,
228 static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
230 struct nsim_dev *nsim_dev = devlink_priv(devlink);
231 union devlink_param_value saved_value;
234 err = devlink_param_driverinit_value_get(devlink,
235 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
238 nsim_dev->max_macs = saved_value.vu32;
239 err = devlink_param_driverinit_value_get(devlink,
240 NSIM_DEVLINK_PARAM_ID_TEST1,
243 nsim_dev->test1 = saved_value.vbool;
246 #define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
248 static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
249 struct devlink *devlink)
251 nsim_dev->dummy_region =
252 devlink_region_create(devlink, "dummy",
253 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
254 NSIM_DEV_DUMMY_REGION_SIZE);
255 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
258 static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
260 devlink_region_destroy(nsim_dev->dummy_region);
263 struct nsim_trap_item {
265 enum devlink_trap_action action;
268 struct nsim_trap_data {
269 struct delayed_work trap_report_dw;
270 struct nsim_trap_item *trap_items_arr;
271 struct nsim_dev *nsim_dev;
272 spinlock_t trap_lock; /* Protects trap_items_arr */
275 /* All driver-specific traps must be documented in
276 * Documentation/networking/devlink/netdevsim.rst
279 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
280 NSIM_TRAP_ID_FID_MISS,
283 #define NSIM_TRAP_NAME_FID_MISS "fid_miss"
285 #define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
287 #define NSIM_TRAP_DROP(_id, _group_id) \
288 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
289 DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
291 #define NSIM_TRAP_EXCEPTION(_id, _group_id) \
292 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
293 DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
295 #define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
296 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
297 NSIM_TRAP_NAME_##_id, \
298 DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
301 static const struct devlink_trap nsim_traps_arr[] = {
302 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
303 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
304 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
305 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
306 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
307 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
308 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
309 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
310 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS),
311 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
314 #define NSIM_TRAP_L4_DATA_LEN 100
316 static struct sk_buff *nsim_dev_trap_skb_build(void)
318 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
324 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
327 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
329 skb_reset_mac_header(skb);
330 eth = skb_put(skb, sizeof(struct ethhdr));
331 eth_random_addr(eth->h_dest);
332 eth_random_addr(eth->h_source);
333 eth->h_proto = htons(ETH_P_IP);
334 skb->protocol = htons(ETH_P_IP);
336 skb_set_network_header(skb, skb->len);
337 iph = skb_put(skb, sizeof(struct iphdr));
338 iph->protocol = IPPROTO_UDP;
339 iph->saddr = in_aton("192.0.2.1");
340 iph->daddr = in_aton("198.51.100.1");
344 iph->tot_len = htons(tot_len);
347 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
349 skb_set_transport_header(skb, skb->len);
350 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
351 get_random_bytes(&udph->source, sizeof(u16));
352 get_random_bytes(&udph->dest, sizeof(u16));
353 udph->len = htons(sizeof(struct udphdr) + data_len);
358 static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
360 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
361 struct devlink *devlink = priv_to_devlink(nsim_dev);
362 struct nsim_trap_data *nsim_trap_data;
365 nsim_trap_data = nsim_dev->trap_data;
367 spin_lock(&nsim_trap_data->trap_lock);
368 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
369 struct nsim_trap_item *nsim_trap_item;
372 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
373 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
376 skb = nsim_dev_trap_skb_build();
379 skb->dev = nsim_dev_port->ns->netdev;
381 /* Trapped packets are usually passed to devlink in softIRQ,
382 * but in this case they are generated in a workqueue. Disable
383 * softIRQs to prevent lockdep from complaining about
384 * "incosistent lock state".
387 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
388 &nsim_dev_port->devlink_port);
392 spin_unlock(&nsim_trap_data->trap_lock);
395 #define NSIM_TRAP_REPORT_INTERVAL_MS 100
397 static void nsim_dev_trap_report_work(struct work_struct *work)
399 struct nsim_trap_data *nsim_trap_data;
400 struct nsim_dev_port *nsim_dev_port;
401 struct nsim_dev *nsim_dev;
403 nsim_trap_data = container_of(work, struct nsim_trap_data,
404 trap_report_dw.work);
405 nsim_dev = nsim_trap_data->nsim_dev;
407 /* For each running port and enabled packet trap, generate a UDP
408 * packet with a random 5-tuple and report it.
410 mutex_lock(&nsim_dev->port_list_lock);
411 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
412 if (!netif_running(nsim_dev_port->ns->netdev))
415 nsim_dev_trap_report(nsim_dev_port);
417 mutex_unlock(&nsim_dev->port_list_lock);
419 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
420 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
423 static int nsim_dev_traps_init(struct devlink *devlink)
425 struct nsim_dev *nsim_dev = devlink_priv(devlink);
426 struct nsim_trap_data *nsim_trap_data;
429 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
433 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
434 sizeof(struct nsim_trap_item),
436 if (!nsim_trap_data->trap_items_arr) {
438 goto err_trap_data_free;
441 /* The lock is used to protect the action state of the registered
442 * traps. The value is written by user and read in delayed work when
443 * iterating over all the traps.
445 spin_lock_init(&nsim_trap_data->trap_lock);
446 nsim_trap_data->nsim_dev = nsim_dev;
447 nsim_dev->trap_data = nsim_trap_data;
449 err = devlink_traps_register(devlink, nsim_traps_arr,
450 ARRAY_SIZE(nsim_traps_arr), NULL);
452 goto err_trap_items_free;
454 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
455 nsim_dev_trap_report_work);
456 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
457 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
462 kfree(nsim_trap_data->trap_items_arr);
464 kfree(nsim_trap_data);
468 static void nsim_dev_traps_exit(struct devlink *devlink)
470 struct nsim_dev *nsim_dev = devlink_priv(devlink);
472 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
473 devlink_traps_unregister(devlink, nsim_traps_arr,
474 ARRAY_SIZE(nsim_traps_arr));
475 kfree(nsim_dev->trap_data->trap_items_arr);
476 kfree(nsim_dev->trap_data);
479 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
480 struct netlink_ext_ack *extack);
481 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
483 static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
484 struct netlink_ext_ack *extack)
486 struct nsim_dev *nsim_dev = devlink_priv(devlink);
488 if (nsim_dev->dont_allow_reload) {
489 /* For testing purposes, user set debugfs dont_allow_reload
490 * value to true. So forbid it.
492 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
496 nsim_dev_reload_destroy(nsim_dev);
500 static int nsim_dev_reload_up(struct devlink *devlink,
501 struct netlink_ext_ack *extack)
503 struct nsim_dev *nsim_dev = devlink_priv(devlink);
505 if (nsim_dev->fail_reload) {
506 /* For testing purposes, user set debugfs fail_reload
507 * value to true. Fail right away.
509 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
513 return nsim_dev_reload_create(nsim_dev, extack);
516 static int nsim_dev_info_get(struct devlink *devlink,
517 struct devlink_info_req *req,
518 struct netlink_ext_ack *extack)
520 return devlink_info_driver_name_put(req, DRV_NAME);
523 #define NSIM_DEV_FLASH_SIZE 500000
524 #define NSIM_DEV_FLASH_CHUNK_SIZE 1000
525 #define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
527 static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
528 const char *component,
529 struct netlink_ext_ack *extack)
531 struct nsim_dev *nsim_dev = devlink_priv(devlink);
534 if (nsim_dev->fw_update_status) {
535 devlink_flash_update_begin_notify(devlink);
536 devlink_flash_update_status_notify(devlink,
537 "Preparing to flash",
541 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
542 if (nsim_dev->fw_update_status)
543 devlink_flash_update_status_notify(devlink, "Flashing",
545 i * NSIM_DEV_FLASH_CHUNK_SIZE,
546 NSIM_DEV_FLASH_SIZE);
547 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
550 if (nsim_dev->fw_update_status) {
551 devlink_flash_update_status_notify(devlink, "Flashing",
554 NSIM_DEV_FLASH_SIZE);
555 devlink_flash_update_status_notify(devlink, "Flashing done",
557 devlink_flash_update_end_notify(devlink);
563 static struct nsim_trap_item *
564 nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
566 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
569 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
570 if (nsim_traps_arr[i].id == trap_id)
571 return &nsim_trap_data->trap_items_arr[i];
577 static int nsim_dev_devlink_trap_init(struct devlink *devlink,
578 const struct devlink_trap *trap,
581 struct nsim_dev *nsim_dev = devlink_priv(devlink);
582 struct nsim_trap_item *nsim_trap_item;
584 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
585 if (WARN_ON(!nsim_trap_item))
588 nsim_trap_item->trap_ctx = trap_ctx;
589 nsim_trap_item->action = trap->init_action;
595 nsim_dev_devlink_trap_action_set(struct devlink *devlink,
596 const struct devlink_trap *trap,
597 enum devlink_trap_action action)
599 struct nsim_dev *nsim_dev = devlink_priv(devlink);
600 struct nsim_trap_item *nsim_trap_item;
602 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
603 if (WARN_ON(!nsim_trap_item))
606 spin_lock(&nsim_dev->trap_data->trap_lock);
607 nsim_trap_item->action = action;
608 spin_unlock(&nsim_dev->trap_data->trap_lock);
613 static const struct devlink_ops nsim_dev_devlink_ops = {
614 .reload_down = nsim_dev_reload_down,
615 .reload_up = nsim_dev_reload_up,
616 .info_get = nsim_dev_info_get,
617 .flash_update = nsim_dev_flash_update,
618 .trap_init = nsim_dev_devlink_trap_init,
619 .trap_action_set = nsim_dev_devlink_trap_action_set,
622 #define NSIM_DEV_MAX_MACS_DEFAULT 32
623 #define NSIM_DEV_TEST1_DEFAULT true
625 static int __nsim_dev_port_add(struct nsim_dev *nsim_dev,
626 unsigned int port_index)
628 struct nsim_dev_port *nsim_dev_port;
629 struct devlink_port *devlink_port;
632 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
635 nsim_dev_port->port_index = port_index;
637 devlink_port = &nsim_dev_port->devlink_port;
638 devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
639 port_index + 1, 0, 0,
640 nsim_dev->switch_id.id,
641 nsim_dev->switch_id.id_len);
642 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
647 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
649 goto err_dl_port_unregister;
651 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
652 if (IS_ERR(nsim_dev_port->ns)) {
653 err = PTR_ERR(nsim_dev_port->ns);
654 goto err_port_debugfs_exit;
657 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
658 list_add(&nsim_dev_port->list, &nsim_dev->port_list);
662 err_port_debugfs_exit:
663 nsim_dev_port_debugfs_exit(nsim_dev_port);
664 err_dl_port_unregister:
665 devlink_port_unregister(devlink_port);
667 kfree(nsim_dev_port);
671 static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
673 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
675 list_del(&nsim_dev_port->list);
676 devlink_port_type_clear(devlink_port);
677 nsim_destroy(nsim_dev_port->ns);
678 nsim_dev_port_debugfs_exit(nsim_dev_port);
679 devlink_port_unregister(devlink_port);
680 kfree(nsim_dev_port);
683 static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
685 struct nsim_dev_port *nsim_dev_port, *tmp;
687 mutex_lock(&nsim_dev->port_list_lock);
688 list_for_each_entry_safe(nsim_dev_port, tmp,
689 &nsim_dev->port_list, list)
690 __nsim_dev_port_del(nsim_dev_port);
691 mutex_unlock(&nsim_dev->port_list_lock);
694 static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
695 unsigned int port_count)
699 for (i = 0; i < port_count; i++) {
700 err = __nsim_dev_port_add(nsim_dev, i);
702 goto err_port_del_all;
707 nsim_dev_port_del_all(nsim_dev);
711 static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
712 struct netlink_ext_ack *extack)
714 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
715 struct devlink *devlink;
718 devlink = priv_to_devlink(nsim_dev);
719 nsim_dev = devlink_priv(devlink);
720 INIT_LIST_HEAD(&nsim_dev->port_list);
721 mutex_init(&nsim_dev->port_list_lock);
722 nsim_dev->fw_update_status = true;
724 nsim_dev->fib_data = nsim_fib_create(devlink, extack);
725 if (IS_ERR(nsim_dev->fib_data))
726 return PTR_ERR(nsim_dev->fib_data);
728 nsim_devlink_param_load_driverinit_values(devlink);
730 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
732 goto err_fib_destroy;
734 err = nsim_dev_traps_init(devlink);
736 goto err_dummy_region_exit;
738 err = nsim_dev_health_init(nsim_dev, devlink);
742 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
744 goto err_health_exit;
746 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
750 &nsim_dev_take_snapshot_fops);
754 nsim_dev_health_exit(nsim_dev);
756 nsim_dev_traps_exit(devlink);
757 err_dummy_region_exit:
758 nsim_dev_dummy_region_exit(nsim_dev);
760 nsim_fib_destroy(devlink, nsim_dev->fib_data);
764 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
766 struct nsim_dev *nsim_dev;
767 struct devlink *devlink;
770 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev));
773 devlink_net_set(devlink, nsim_bus_dev->initial_net);
774 nsim_dev = devlink_priv(devlink);
775 nsim_dev->nsim_bus_dev = nsim_bus_dev;
776 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
777 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
778 INIT_LIST_HEAD(&nsim_dev->port_list);
779 mutex_init(&nsim_dev->port_list_lock);
780 nsim_dev->fw_update_status = true;
781 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
782 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
784 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
786 err = nsim_dev_resources_register(devlink);
788 goto err_devlink_free;
790 nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
791 if (IS_ERR(nsim_dev->fib_data)) {
792 err = PTR_ERR(nsim_dev->fib_data);
793 goto err_resources_unregister;
796 err = devlink_register(devlink, &nsim_bus_dev->dev);
798 goto err_fib_destroy;
800 err = devlink_params_register(devlink, nsim_devlink_params,
801 ARRAY_SIZE(nsim_devlink_params));
803 goto err_dl_unregister;
804 nsim_devlink_set_params_init_values(nsim_dev, devlink);
806 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
808 goto err_params_unregister;
810 err = nsim_dev_traps_init(devlink);
812 goto err_dummy_region_exit;
814 err = nsim_dev_debugfs_init(nsim_dev);
818 err = nsim_dev_health_init(nsim_dev, devlink);
820 goto err_debugfs_exit;
822 err = nsim_bpf_dev_init(nsim_dev);
824 goto err_health_exit;
826 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
828 goto err_bpf_dev_exit;
830 devlink_params_publish(devlink);
831 devlink_reload_enable(devlink);
835 nsim_bpf_dev_exit(nsim_dev);
837 nsim_dev_health_exit(nsim_dev);
839 nsim_dev_debugfs_exit(nsim_dev);
841 nsim_dev_traps_exit(devlink);
842 err_dummy_region_exit:
843 nsim_dev_dummy_region_exit(nsim_dev);
844 err_params_unregister:
845 devlink_params_unregister(devlink, nsim_devlink_params,
846 ARRAY_SIZE(nsim_devlink_params));
848 devlink_unregister(devlink);
850 nsim_fib_destroy(devlink, nsim_dev->fib_data);
851 err_resources_unregister:
852 devlink_resources_unregister(devlink, NULL);
854 devlink_free(devlink);
858 static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
860 struct devlink *devlink = priv_to_devlink(nsim_dev);
862 if (devlink_is_reload_failed(devlink))
864 debugfs_remove(nsim_dev->take_snapshot);
865 nsim_dev_port_del_all(nsim_dev);
866 nsim_dev_health_exit(nsim_dev);
867 nsim_dev_traps_exit(devlink);
868 nsim_dev_dummy_region_exit(nsim_dev);
869 mutex_destroy(&nsim_dev->port_list_lock);
870 nsim_fib_destroy(devlink, nsim_dev->fib_data);
873 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev)
875 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
876 struct devlink *devlink = priv_to_devlink(nsim_dev);
878 devlink_reload_disable(devlink);
880 nsim_dev_reload_destroy(nsim_dev);
882 nsim_bpf_dev_exit(nsim_dev);
883 nsim_dev_debugfs_exit(nsim_dev);
884 devlink_params_unregister(devlink, nsim_devlink_params,
885 ARRAY_SIZE(nsim_devlink_params));
886 devlink_unregister(devlink);
887 devlink_resources_unregister(devlink, NULL);
888 devlink_free(devlink);
891 static struct nsim_dev_port *
892 __nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index)
894 struct nsim_dev_port *nsim_dev_port;
896 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
897 if (nsim_dev_port->port_index == port_index)
898 return nsim_dev_port;
902 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
903 unsigned int port_index)
905 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
908 mutex_lock(&nsim_dev->port_list_lock);
909 if (__nsim_dev_port_lookup(nsim_dev, port_index))
912 err = __nsim_dev_port_add(nsim_dev, port_index);
913 mutex_unlock(&nsim_dev->port_list_lock);
917 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
918 unsigned int port_index)
920 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
921 struct nsim_dev_port *nsim_dev_port;
924 mutex_lock(&nsim_dev->port_list_lock);
925 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index);
929 __nsim_dev_port_del(nsim_dev_port);
930 mutex_unlock(&nsim_dev->port_list_lock);
934 int nsim_dev_init(void)
936 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
937 if (IS_ERR_OR_NULL(nsim_dev_ddir))
942 void nsim_dev_exit(void)
944 debugfs_remove_recursive(nsim_dev_ddir);