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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>
30#include <net/ip.h>
31#include <net/flow_offload.h>
32#include <uapi/linux/devlink.h>
33#include <uapi/linux/ip.h>
34#include <uapi/linux/udp.h>
35
36#include "netdevsim.h"
37
38static struct dentry *nsim_dev_ddir;
39
40#define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
41
42static int
43nsim_dev_take_snapshot(struct devlink *devlink, struct netlink_ext_ack *extack,
44 u8 **data)
45{
46 void *dummy_data;
47
48 dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
49 if (!dummy_data)
50 return -ENOMEM;
51
52 get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
53
54 *data = dummy_data;
55
56 return 0;
57}
58
59static ssize_t nsim_dev_take_snapshot_write(struct file *file,
60 const char __user *data,
61 size_t count, loff_t *ppos)
62{
63 struct nsim_dev *nsim_dev = file->private_data;
64 struct devlink *devlink;
65 u8 *dummy_data;
66 int err;
67 u32 id;
68
69 devlink = priv_to_devlink(nsim_dev);
70
71 err = nsim_dev_take_snapshot(devlink, NULL, &dummy_data);
72 if (err)
73 return err;
74
75 err = devlink_region_snapshot_id_get(devlink, &id);
76 if (err) {
77 pr_err("Failed to get snapshot id\n");
78 kfree(dummy_data);
79 return err;
80 }
81 err = devlink_region_snapshot_create(nsim_dev->dummy_region,
82 dummy_data, id);
83 devlink_region_snapshot_id_put(devlink, id);
84 if (err) {
85 pr_err("Failed to create region snapshot\n");
86 kfree(dummy_data);
87 return err;
88 }
89
90 return count;
91}
92
93static const struct file_operations nsim_dev_take_snapshot_fops = {
94 .open = simple_open,
95 .write = nsim_dev_take_snapshot_write,
96 .llseek = generic_file_llseek,
97};
98
99static ssize_t nsim_dev_trap_fa_cookie_read(struct file *file,
100 char __user *data,
101 size_t count, loff_t *ppos)
102{
103 struct nsim_dev *nsim_dev = file->private_data;
104 struct flow_action_cookie *fa_cookie;
105 unsigned int buf_len;
106 ssize_t ret;
107 char *buf;
108
109 spin_lock(&nsim_dev->fa_cookie_lock);
110 fa_cookie = nsim_dev->fa_cookie;
111 if (!fa_cookie) {
112 ret = -EINVAL;
113 goto errout;
114 }
115 buf_len = fa_cookie->cookie_len * 2;
116 buf = kmalloc(buf_len, GFP_ATOMIC);
117 if (!buf) {
118 ret = -ENOMEM;
119 goto errout;
120 }
121 bin2hex(buf, fa_cookie->cookie, fa_cookie->cookie_len);
122 spin_unlock(&nsim_dev->fa_cookie_lock);
123
124 ret = simple_read_from_buffer(data, count, ppos, buf, buf_len);
125
126 kfree(buf);
127 return ret;
128
129errout:
130 spin_unlock(&nsim_dev->fa_cookie_lock);
131 return ret;
132}
133
134static ssize_t nsim_dev_trap_fa_cookie_write(struct file *file,
135 const char __user *data,
136 size_t count, loff_t *ppos)
137{
138 struct nsim_dev *nsim_dev = file->private_data;
139 struct flow_action_cookie *fa_cookie;
140 size_t cookie_len;
141 ssize_t ret;
142 char *buf;
143
144 if (*ppos != 0)
145 return -EINVAL;
146 cookie_len = (count - 1) / 2;
147 if ((count - 1) % 2)
148 return -EINVAL;
149 buf = kmalloc(count, GFP_KERNEL | __GFP_NOWARN);
150 if (!buf)
151 return -ENOMEM;
152
153 ret = simple_write_to_buffer(buf, count, ppos, data, count);
154 if (ret < 0)
155 goto free_buf;
156
157 fa_cookie = kmalloc(sizeof(*fa_cookie) + cookie_len,
158 GFP_KERNEL | __GFP_NOWARN);
159 if (!fa_cookie) {
160 ret = -ENOMEM;
161 goto free_buf;
162 }
163
164 fa_cookie->cookie_len = cookie_len;
165 ret = hex2bin(fa_cookie->cookie, buf, cookie_len);
166 if (ret)
167 goto free_fa_cookie;
168 kfree(buf);
169
170 spin_lock(&nsim_dev->fa_cookie_lock);
171 kfree(nsim_dev->fa_cookie);
172 nsim_dev->fa_cookie = fa_cookie;
173 spin_unlock(&nsim_dev->fa_cookie_lock);
174
175 return count;
176
177free_fa_cookie:
178 kfree(fa_cookie);
179free_buf:
180 kfree(buf);
181 return ret;
182}
183
184static const struct file_operations nsim_dev_trap_fa_cookie_fops = {
185 .open = simple_open,
186 .read = nsim_dev_trap_fa_cookie_read,
187 .write = nsim_dev_trap_fa_cookie_write,
188 .llseek = generic_file_llseek,
189};
190
191static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
192{
193 char dev_ddir_name[sizeof(DRV_NAME) + 10];
194
195 sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
196 nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
197 if (IS_ERR(nsim_dev->ddir))
198 return PTR_ERR(nsim_dev->ddir);
199 nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
200 if (IS_ERR(nsim_dev->ports_ddir))
201 return PTR_ERR(nsim_dev->ports_ddir);
202 debugfs_create_bool("fw_update_status", 0600, nsim_dev->ddir,
203 &nsim_dev->fw_update_status);
204 debugfs_create_u32("max_macs", 0600, nsim_dev->ddir,
205 &nsim_dev->max_macs);
206 debugfs_create_bool("test1", 0600, nsim_dev->ddir,
207 &nsim_dev->test1);
208 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
209 0200,
210 nsim_dev->ddir,
211 nsim_dev,
212 &nsim_dev_take_snapshot_fops);
213 debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
214 &nsim_dev->dont_allow_reload);
215 debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
216 &nsim_dev->fail_reload);
217 debugfs_create_file("trap_flow_action_cookie", 0600, nsim_dev->ddir,
218 nsim_dev, &nsim_dev_trap_fa_cookie_fops);
219 debugfs_create_bool("fail_trap_group_set", 0600,
220 nsim_dev->ddir,
221 &nsim_dev->fail_trap_group_set);
222 debugfs_create_bool("fail_trap_policer_set", 0600,
223 nsim_dev->ddir,
224 &nsim_dev->fail_trap_policer_set);
225 debugfs_create_bool("fail_trap_policer_counter_get", 0600,
226 nsim_dev->ddir,
227 &nsim_dev->fail_trap_policer_counter_get);
228 nsim_udp_tunnels_debugfs_create(nsim_dev);
229 return 0;
230}
231
232static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
233{
234 debugfs_remove_recursive(nsim_dev->ports_ddir);
235 debugfs_remove_recursive(nsim_dev->ddir);
236}
237
238static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
239 struct nsim_dev_port *nsim_dev_port)
240{
241 char port_ddir_name[16];
242 char dev_link_name[32];
243
244 sprintf(port_ddir_name, "%u", nsim_dev_port->port_index);
245 nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
246 nsim_dev->ports_ddir);
247 if (IS_ERR(nsim_dev_port->ddir))
248 return PTR_ERR(nsim_dev_port->ddir);
249
250 sprintf(dev_link_name, "../../../" DRV_NAME "%u",
251 nsim_dev->nsim_bus_dev->dev.id);
252 debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
253
254 return 0;
255}
256
257static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
258{
259 debugfs_remove_recursive(nsim_dev_port->ddir);
260}
261
262static int nsim_dev_resources_register(struct devlink *devlink)
263{
264 struct devlink_resource_size_params params = {
265 .size_max = (u64)-1,
266 .size_granularity = 1,
267 .unit = DEVLINK_RESOURCE_UNIT_ENTRY
268 };
269 int err;
270
271
272 err = devlink_resource_register(devlink, "IPv4", (u64)-1,
273 NSIM_RESOURCE_IPV4,
274 DEVLINK_RESOURCE_ID_PARENT_TOP,
275 ¶ms);
276 if (err) {
277 pr_err("Failed to register IPv4 top resource\n");
278 goto out;
279 }
280
281 err = devlink_resource_register(devlink, "fib", (u64)-1,
282 NSIM_RESOURCE_IPV4_FIB,
283 NSIM_RESOURCE_IPV4, ¶ms);
284 if (err) {
285 pr_err("Failed to register IPv4 FIB resource\n");
286 return err;
287 }
288
289 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
290 NSIM_RESOURCE_IPV4_FIB_RULES,
291 NSIM_RESOURCE_IPV4, ¶ms);
292 if (err) {
293 pr_err("Failed to register IPv4 FIB rules resource\n");
294 return err;
295 }
296
297
298 err = devlink_resource_register(devlink, "IPv6", (u64)-1,
299 NSIM_RESOURCE_IPV6,
300 DEVLINK_RESOURCE_ID_PARENT_TOP,
301 ¶ms);
302 if (err) {
303 pr_err("Failed to register IPv6 top resource\n");
304 goto out;
305 }
306
307 err = devlink_resource_register(devlink, "fib", (u64)-1,
308 NSIM_RESOURCE_IPV6_FIB,
309 NSIM_RESOURCE_IPV6, ¶ms);
310 if (err) {
311 pr_err("Failed to register IPv6 FIB resource\n");
312 return err;
313 }
314
315 err = devlink_resource_register(devlink, "fib-rules", (u64)-1,
316 NSIM_RESOURCE_IPV6_FIB_RULES,
317 NSIM_RESOURCE_IPV6, ¶ms);
318 if (err) {
319 pr_err("Failed to register IPv6 FIB rules resource\n");
320 return err;
321 }
322
323out:
324 return err;
325}
326
327enum nsim_devlink_param_id {
328 NSIM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
329 NSIM_DEVLINK_PARAM_ID_TEST1,
330};
331
332static const struct devlink_param nsim_devlink_params[] = {
333 DEVLINK_PARAM_GENERIC(MAX_MACS,
334 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
335 NULL, NULL, NULL),
336 DEVLINK_PARAM_DRIVER(NSIM_DEVLINK_PARAM_ID_TEST1,
337 "test1", DEVLINK_PARAM_TYPE_BOOL,
338 BIT(DEVLINK_PARAM_CMODE_DRIVERINIT),
339 NULL, NULL, NULL),
340};
341
342static void nsim_devlink_set_params_init_values(struct nsim_dev *nsim_dev,
343 struct devlink *devlink)
344{
345 union devlink_param_value value;
346
347 value.vu32 = nsim_dev->max_macs;
348 devlink_param_driverinit_value_set(devlink,
349 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
350 value);
351 value.vbool = nsim_dev->test1;
352 devlink_param_driverinit_value_set(devlink,
353 NSIM_DEVLINK_PARAM_ID_TEST1,
354 value);
355}
356
357static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
358{
359 struct nsim_dev *nsim_dev = devlink_priv(devlink);
360 union devlink_param_value saved_value;
361 int err;
362
363 err = devlink_param_driverinit_value_get(devlink,
364 DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
365 &saved_value);
366 if (!err)
367 nsim_dev->max_macs = saved_value.vu32;
368 err = devlink_param_driverinit_value_get(devlink,
369 NSIM_DEVLINK_PARAM_ID_TEST1,
370 &saved_value);
371 if (!err)
372 nsim_dev->test1 = saved_value.vbool;
373}
374
375#define NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX 16
376
377static const struct devlink_region_ops dummy_region_ops = {
378 .name = "dummy",
379 .destructor = &kfree,
380 .snapshot = nsim_dev_take_snapshot,
381};
382
383static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
384 struct devlink *devlink)
385{
386 nsim_dev->dummy_region =
387 devlink_region_create(devlink, &dummy_region_ops,
388 NSIM_DEV_DUMMY_REGION_SNAPSHOT_MAX,
389 NSIM_DEV_DUMMY_REGION_SIZE);
390 return PTR_ERR_OR_ZERO(nsim_dev->dummy_region);
391}
392
393static void nsim_dev_dummy_region_exit(struct nsim_dev *nsim_dev)
394{
395 devlink_region_destroy(nsim_dev->dummy_region);
396}
397
398struct nsim_trap_item {
399 void *trap_ctx;
400 enum devlink_trap_action action;
401};
402
403struct nsim_trap_data {
404 struct delayed_work trap_report_dw;
405 struct nsim_trap_item *trap_items_arr;
406 u64 *trap_policers_cnt_arr;
407 struct nsim_dev *nsim_dev;
408 spinlock_t trap_lock;
409};
410
411
412
413
414enum {
415 NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,
416 NSIM_TRAP_ID_FID_MISS,
417};
418
419#define NSIM_TRAP_NAME_FID_MISS "fid_miss"
420
421#define NSIM_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
422
423#define NSIM_TRAP_DROP(_id, _group_id) \
424 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
425 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
426 NSIM_TRAP_METADATA)
427#define NSIM_TRAP_DROP_EXT(_id, _group_id, _metadata) \
428 DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
429 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
430 NSIM_TRAP_METADATA | (_metadata))
431#define NSIM_TRAP_EXCEPTION(_id, _group_id) \
432 DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
433 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
434 NSIM_TRAP_METADATA)
435#define NSIM_TRAP_CONTROL(_id, _group_id, _action) \
436 DEVLINK_TRAP_GENERIC(CONTROL, _action, _id, \
437 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
438 NSIM_TRAP_METADATA)
439#define NSIM_TRAP_DRIVER_EXCEPTION(_id, _group_id) \
440 DEVLINK_TRAP_DRIVER(EXCEPTION, TRAP, NSIM_TRAP_ID_##_id, \
441 NSIM_TRAP_NAME_##_id, \
442 DEVLINK_TRAP_GROUP_GENERIC_ID_##_group_id, \
443 NSIM_TRAP_METADATA)
444
445#define NSIM_DEV_TRAP_POLICER_MIN_RATE 1
446#define NSIM_DEV_TRAP_POLICER_MAX_RATE 8000
447#define NSIM_DEV_TRAP_POLICER_MIN_BURST 8
448#define NSIM_DEV_TRAP_POLICER_MAX_BURST 65536
449
450#define NSIM_TRAP_POLICER(_id, _rate, _burst) \
451 DEVLINK_TRAP_POLICER(_id, _rate, _burst, \
452 NSIM_DEV_TRAP_POLICER_MAX_RATE, \
453 NSIM_DEV_TRAP_POLICER_MIN_RATE, \
454 NSIM_DEV_TRAP_POLICER_MAX_BURST, \
455 NSIM_DEV_TRAP_POLICER_MIN_BURST)
456
457static const struct devlink_trap_policer nsim_trap_policers_arr[] = {
458 NSIM_TRAP_POLICER(1, 1000, 128),
459 NSIM_TRAP_POLICER(2, 2000, 256),
460 NSIM_TRAP_POLICER(3, 3000, 512),
461};
462
463static const struct devlink_trap_group nsim_trap_groups_arr[] = {
464 DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 0),
465 DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
466 DEVLINK_TRAP_GROUP_GENERIC(L3_EXCEPTIONS, 1),
467 DEVLINK_TRAP_GROUP_GENERIC(BUFFER_DROPS, 2),
468 DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 3),
469 DEVLINK_TRAP_GROUP_GENERIC(MC_SNOOPING, 3),
470};
471
472static const struct devlink_trap nsim_traps_arr[] = {
473 NSIM_TRAP_DROP(SMAC_MC, L2_DROPS),
474 NSIM_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
475 NSIM_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
476 NSIM_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
477 NSIM_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
478 NSIM_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
479 NSIM_TRAP_DRIVER_EXCEPTION(FID_MISS, L2_DROPS),
480 NSIM_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
481 NSIM_TRAP_EXCEPTION(TTL_ERROR, L3_EXCEPTIONS),
482 NSIM_TRAP_DROP(TAIL_DROP, BUFFER_DROPS),
483 NSIM_TRAP_DROP_EXT(INGRESS_FLOW_ACTION_DROP, ACL_DROPS,
484 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
485 NSIM_TRAP_DROP_EXT(EGRESS_FLOW_ACTION_DROP, ACL_DROPS,
486 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE),
487 NSIM_TRAP_CONTROL(IGMP_QUERY, MC_SNOOPING, MIRROR),
488 NSIM_TRAP_CONTROL(IGMP_V1_REPORT, MC_SNOOPING, TRAP),
489};
490
491#define NSIM_TRAP_L4_DATA_LEN 100
492
493static struct sk_buff *nsim_dev_trap_skb_build(void)
494{
495 int tot_len, data_len = NSIM_TRAP_L4_DATA_LEN;
496 struct sk_buff *skb;
497 struct udphdr *udph;
498 struct ethhdr *eth;
499 struct iphdr *iph;
500
501 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
502 if (!skb)
503 return NULL;
504 tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
505
506 skb_reset_mac_header(skb);
507 eth = skb_put(skb, sizeof(struct ethhdr));
508 eth_random_addr(eth->h_dest);
509 eth_random_addr(eth->h_source);
510 eth->h_proto = htons(ETH_P_IP);
511 skb->protocol = htons(ETH_P_IP);
512
513 skb_set_network_header(skb, skb->len);
514 iph = skb_put(skb, sizeof(struct iphdr));
515 iph->protocol = IPPROTO_UDP;
516 iph->saddr = in_aton("192.0.2.1");
517 iph->daddr = in_aton("198.51.100.1");
518 iph->version = 0x4;
519 iph->frag_off = 0;
520 iph->ihl = 0x5;
521 iph->tot_len = htons(tot_len);
522 iph->ttl = 100;
523 iph->check = 0;
524 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
525
526 skb_set_transport_header(skb, skb->len);
527 udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
528 get_random_bytes(&udph->source, sizeof(u16));
529 get_random_bytes(&udph->dest, sizeof(u16));
530 udph->len = htons(sizeof(struct udphdr) + data_len);
531
532 return skb;
533}
534
535static void nsim_dev_trap_report(struct nsim_dev_port *nsim_dev_port)
536{
537 struct nsim_dev *nsim_dev = nsim_dev_port->ns->nsim_dev;
538 struct devlink *devlink = priv_to_devlink(nsim_dev);
539 struct nsim_trap_data *nsim_trap_data;
540 int i;
541
542 nsim_trap_data = nsim_dev->trap_data;
543
544 spin_lock(&nsim_trap_data->trap_lock);
545 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
546 struct flow_action_cookie *fa_cookie = NULL;
547 struct nsim_trap_item *nsim_trap_item;
548 struct sk_buff *skb;
549 bool has_fa_cookie;
550
551 has_fa_cookie = nsim_traps_arr[i].metadata_cap &
552 DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE;
553
554 nsim_trap_item = &nsim_trap_data->trap_items_arr[i];
555 if (nsim_trap_item->action == DEVLINK_TRAP_ACTION_DROP)
556 continue;
557
558 skb = nsim_dev_trap_skb_build();
559 if (!skb)
560 continue;
561 skb->dev = nsim_dev_port->ns->netdev;
562
563
564
565
566
567
568
569 spin_lock_bh(&nsim_dev->fa_cookie_lock);
570 fa_cookie = has_fa_cookie ? nsim_dev->fa_cookie : NULL;
571 devlink_trap_report(devlink, skb, nsim_trap_item->trap_ctx,
572 &nsim_dev_port->devlink_port, fa_cookie);
573 spin_unlock_bh(&nsim_dev->fa_cookie_lock);
574 consume_skb(skb);
575 }
576 spin_unlock(&nsim_trap_data->trap_lock);
577}
578
579#define NSIM_TRAP_REPORT_INTERVAL_MS 100
580
581static void nsim_dev_trap_report_work(struct work_struct *work)
582{
583 struct nsim_trap_data *nsim_trap_data;
584 struct nsim_dev_port *nsim_dev_port;
585 struct nsim_dev *nsim_dev;
586
587 nsim_trap_data = container_of(work, struct nsim_trap_data,
588 trap_report_dw.work);
589 nsim_dev = nsim_trap_data->nsim_dev;
590
591
592
593
594 mutex_lock(&nsim_dev->port_list_lock);
595 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list) {
596 if (!netif_running(nsim_dev_port->ns->netdev))
597 continue;
598
599 nsim_dev_trap_report(nsim_dev_port);
600 }
601 mutex_unlock(&nsim_dev->port_list_lock);
602
603 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
604 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
605}
606
607static int nsim_dev_traps_init(struct devlink *devlink)
608{
609 size_t policers_count = ARRAY_SIZE(nsim_trap_policers_arr);
610 struct nsim_dev *nsim_dev = devlink_priv(devlink);
611 struct nsim_trap_data *nsim_trap_data;
612 int err;
613
614 nsim_trap_data = kzalloc(sizeof(*nsim_trap_data), GFP_KERNEL);
615 if (!nsim_trap_data)
616 return -ENOMEM;
617
618 nsim_trap_data->trap_items_arr = kcalloc(ARRAY_SIZE(nsim_traps_arr),
619 sizeof(struct nsim_trap_item),
620 GFP_KERNEL);
621 if (!nsim_trap_data->trap_items_arr) {
622 err = -ENOMEM;
623 goto err_trap_data_free;
624 }
625
626 nsim_trap_data->trap_policers_cnt_arr = kcalloc(policers_count,
627 sizeof(u64),
628 GFP_KERNEL);
629 if (!nsim_trap_data->trap_policers_cnt_arr) {
630 err = -ENOMEM;
631 goto err_trap_items_free;
632 }
633
634
635
636
637
638 spin_lock_init(&nsim_trap_data->trap_lock);
639 nsim_trap_data->nsim_dev = nsim_dev;
640 nsim_dev->trap_data = nsim_trap_data;
641
642 err = devlink_trap_policers_register(devlink, nsim_trap_policers_arr,
643 policers_count);
644 if (err)
645 goto err_trap_policers_cnt_free;
646
647 err = devlink_trap_groups_register(devlink, nsim_trap_groups_arr,
648 ARRAY_SIZE(nsim_trap_groups_arr));
649 if (err)
650 goto err_trap_policers_unregister;
651
652 err = devlink_traps_register(devlink, nsim_traps_arr,
653 ARRAY_SIZE(nsim_traps_arr), NULL);
654 if (err)
655 goto err_trap_groups_unregister;
656
657 INIT_DELAYED_WORK(&nsim_dev->trap_data->trap_report_dw,
658 nsim_dev_trap_report_work);
659 schedule_delayed_work(&nsim_dev->trap_data->trap_report_dw,
660 msecs_to_jiffies(NSIM_TRAP_REPORT_INTERVAL_MS));
661
662 return 0;
663
664err_trap_groups_unregister:
665 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
666 ARRAY_SIZE(nsim_trap_groups_arr));
667err_trap_policers_unregister:
668 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
669 ARRAY_SIZE(nsim_trap_policers_arr));
670err_trap_policers_cnt_free:
671 kfree(nsim_trap_data->trap_policers_cnt_arr);
672err_trap_items_free:
673 kfree(nsim_trap_data->trap_items_arr);
674err_trap_data_free:
675 kfree(nsim_trap_data);
676 return err;
677}
678
679static void nsim_dev_traps_exit(struct devlink *devlink)
680{
681 struct nsim_dev *nsim_dev = devlink_priv(devlink);
682
683 cancel_delayed_work_sync(&nsim_dev->trap_data->trap_report_dw);
684 devlink_traps_unregister(devlink, nsim_traps_arr,
685 ARRAY_SIZE(nsim_traps_arr));
686 devlink_trap_groups_unregister(devlink, nsim_trap_groups_arr,
687 ARRAY_SIZE(nsim_trap_groups_arr));
688 devlink_trap_policers_unregister(devlink, nsim_trap_policers_arr,
689 ARRAY_SIZE(nsim_trap_policers_arr));
690 kfree(nsim_dev->trap_data->trap_policers_cnt_arr);
691 kfree(nsim_dev->trap_data->trap_items_arr);
692 kfree(nsim_dev->trap_data);
693}
694
695static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
696 struct netlink_ext_ack *extack);
697static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
698
699static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
700 struct netlink_ext_ack *extack)
701{
702 struct nsim_dev *nsim_dev = devlink_priv(devlink);
703
704 if (nsim_dev->dont_allow_reload) {
705
706
707
708 NL_SET_ERR_MSG_MOD(extack, "User forbid the reload for testing purposes");
709 return -EOPNOTSUPP;
710 }
711
712 nsim_dev_reload_destroy(nsim_dev);
713 return 0;
714}
715
716static int nsim_dev_reload_up(struct devlink *devlink,
717 struct netlink_ext_ack *extack)
718{
719 struct nsim_dev *nsim_dev = devlink_priv(devlink);
720
721 if (nsim_dev->fail_reload) {
722
723
724
725 NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes");
726 return -EINVAL;
727 }
728
729 return nsim_dev_reload_create(nsim_dev, extack);
730}
731
732static int nsim_dev_info_get(struct devlink *devlink,
733 struct devlink_info_req *req,
734 struct netlink_ext_ack *extack)
735{
736 return devlink_info_driver_name_put(req, DRV_NAME);
737}
738
739#define NSIM_DEV_FLASH_SIZE 500000
740#define NSIM_DEV_FLASH_CHUNK_SIZE 1000
741#define NSIM_DEV_FLASH_CHUNK_TIME_MS 10
742
743static int nsim_dev_flash_update(struct devlink *devlink, const char *file_name,
744 const char *component,
745 struct netlink_ext_ack *extack)
746{
747 struct nsim_dev *nsim_dev = devlink_priv(devlink);
748 int i;
749
750 if (nsim_dev->fw_update_status) {
751 devlink_flash_update_begin_notify(devlink);
752 devlink_flash_update_status_notify(devlink,
753 "Preparing to flash",
754 component, 0, 0);
755 }
756
757 for (i = 0; i < NSIM_DEV_FLASH_SIZE / NSIM_DEV_FLASH_CHUNK_SIZE; i++) {
758 if (nsim_dev->fw_update_status)
759 devlink_flash_update_status_notify(devlink, "Flashing",
760 component,
761 i * NSIM_DEV_FLASH_CHUNK_SIZE,
762 NSIM_DEV_FLASH_SIZE);
763 msleep(NSIM_DEV_FLASH_CHUNK_TIME_MS);
764 }
765
766 if (nsim_dev->fw_update_status) {
767 devlink_flash_update_status_notify(devlink, "Flashing",
768 component,
769 NSIM_DEV_FLASH_SIZE,
770 NSIM_DEV_FLASH_SIZE);
771 devlink_flash_update_status_notify(devlink, "Flashing done",
772 component, 0, 0);
773 devlink_flash_update_end_notify(devlink);
774 }
775
776 return 0;
777}
778
779static struct nsim_trap_item *
780nsim_dev_trap_item_lookup(struct nsim_dev *nsim_dev, u16 trap_id)
781{
782 struct nsim_trap_data *nsim_trap_data = nsim_dev->trap_data;
783 int i;
784
785 for (i = 0; i < ARRAY_SIZE(nsim_traps_arr); i++) {
786 if (nsim_traps_arr[i].id == trap_id)
787 return &nsim_trap_data->trap_items_arr[i];
788 }
789
790 return NULL;
791}
792
793static int nsim_dev_devlink_trap_init(struct devlink *devlink,
794 const struct devlink_trap *trap,
795 void *trap_ctx)
796{
797 struct nsim_dev *nsim_dev = devlink_priv(devlink);
798 struct nsim_trap_item *nsim_trap_item;
799
800 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
801 if (WARN_ON(!nsim_trap_item))
802 return -ENOENT;
803
804 nsim_trap_item->trap_ctx = trap_ctx;
805 nsim_trap_item->action = trap->init_action;
806
807 return 0;
808}
809
810static int
811nsim_dev_devlink_trap_action_set(struct devlink *devlink,
812 const struct devlink_trap *trap,
813 enum devlink_trap_action action,
814 struct netlink_ext_ack *extack)
815{
816 struct nsim_dev *nsim_dev = devlink_priv(devlink);
817 struct nsim_trap_item *nsim_trap_item;
818
819 nsim_trap_item = nsim_dev_trap_item_lookup(nsim_dev, trap->id);
820 if (WARN_ON(!nsim_trap_item))
821 return -ENOENT;
822
823 spin_lock(&nsim_dev->trap_data->trap_lock);
824 nsim_trap_item->action = action;
825 spin_unlock(&nsim_dev->trap_data->trap_lock);
826
827 return 0;
828}
829
830static int
831nsim_dev_devlink_trap_group_set(struct devlink *devlink,
832 const struct devlink_trap_group *group,
833 const struct devlink_trap_policer *policer,
834 struct netlink_ext_ack *extack)
835{
836 struct nsim_dev *nsim_dev = devlink_priv(devlink);
837
838 if (nsim_dev->fail_trap_group_set)
839 return -EINVAL;
840
841 return 0;
842}
843
844static int
845nsim_dev_devlink_trap_policer_set(struct devlink *devlink,
846 const struct devlink_trap_policer *policer,
847 u64 rate, u64 burst,
848 struct netlink_ext_ack *extack)
849{
850 struct nsim_dev *nsim_dev = devlink_priv(devlink);
851
852 if (nsim_dev->fail_trap_policer_set) {
853 NL_SET_ERR_MSG_MOD(extack, "User setup the operation to fail for testing purposes");
854 return -EINVAL;
855 }
856
857 return 0;
858}
859
860static int
861nsim_dev_devlink_trap_policer_counter_get(struct devlink *devlink,
862 const struct devlink_trap_policer *policer,
863 u64 *p_drops)
864{
865 struct nsim_dev *nsim_dev = devlink_priv(devlink);
866 u64 *cnt;
867
868 if (nsim_dev->fail_trap_policer_counter_get)
869 return -EINVAL;
870
871 cnt = &nsim_dev->trap_data->trap_policers_cnt_arr[policer->id - 1];
872 *p_drops = (*cnt)++;
873
874 return 0;
875}
876
877static const struct devlink_ops nsim_dev_devlink_ops = {
878 .reload_down = nsim_dev_reload_down,
879 .reload_up = nsim_dev_reload_up,
880 .info_get = nsim_dev_info_get,
881 .flash_update = nsim_dev_flash_update,
882 .trap_init = nsim_dev_devlink_trap_init,
883 .trap_action_set = nsim_dev_devlink_trap_action_set,
884 .trap_group_set = nsim_dev_devlink_trap_group_set,
885 .trap_policer_set = nsim_dev_devlink_trap_policer_set,
886 .trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
887};
888
889#define NSIM_DEV_MAX_MACS_DEFAULT 32
890#define NSIM_DEV_TEST1_DEFAULT true
891
892static int __nsim_dev_port_add(struct nsim_dev *nsim_dev,
893 unsigned int port_index)
894{
895 struct devlink_port_attrs attrs = {};
896 struct nsim_dev_port *nsim_dev_port;
897 struct devlink_port *devlink_port;
898 int err;
899
900 nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
901 if (!nsim_dev_port)
902 return -ENOMEM;
903 nsim_dev_port->port_index = port_index;
904
905 devlink_port = &nsim_dev_port->devlink_port;
906 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
907 attrs.phys.port_number = port_index + 1;
908 memcpy(attrs.switch_id.id, nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
909 attrs.switch_id.id_len = nsim_dev->switch_id.id_len;
910 devlink_port_attrs_set(devlink_port, &attrs);
911 err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
912 port_index);
913 if (err)
914 goto err_port_free;
915
916 err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
917 if (err)
918 goto err_dl_port_unregister;
919
920 nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
921 if (IS_ERR(nsim_dev_port->ns)) {
922 err = PTR_ERR(nsim_dev_port->ns);
923 goto err_port_debugfs_exit;
924 }
925
926 devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
927 list_add(&nsim_dev_port->list, &nsim_dev->port_list);
928
929 return 0;
930
931err_port_debugfs_exit:
932 nsim_dev_port_debugfs_exit(nsim_dev_port);
933err_dl_port_unregister:
934 devlink_port_unregister(devlink_port);
935err_port_free:
936 kfree(nsim_dev_port);
937 return err;
938}
939
940static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
941{
942 struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
943
944 list_del(&nsim_dev_port->list);
945 devlink_port_type_clear(devlink_port);
946 nsim_destroy(nsim_dev_port->ns);
947 nsim_dev_port_debugfs_exit(nsim_dev_port);
948 devlink_port_unregister(devlink_port);
949 kfree(nsim_dev_port);
950}
951
952static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
953{
954 struct nsim_dev_port *nsim_dev_port, *tmp;
955
956 mutex_lock(&nsim_dev->port_list_lock);
957 list_for_each_entry_safe(nsim_dev_port, tmp,
958 &nsim_dev->port_list, list)
959 __nsim_dev_port_del(nsim_dev_port);
960 mutex_unlock(&nsim_dev->port_list_lock);
961}
962
963static int nsim_dev_port_add_all(struct nsim_dev *nsim_dev,
964 unsigned int port_count)
965{
966 int i, err;
967
968 for (i = 0; i < port_count; i++) {
969 err = __nsim_dev_port_add(nsim_dev, i);
970 if (err)
971 goto err_port_del_all;
972 }
973 return 0;
974
975err_port_del_all:
976 nsim_dev_port_del_all(nsim_dev);
977 return err;
978}
979
980static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
981 struct netlink_ext_ack *extack)
982{
983 struct nsim_bus_dev *nsim_bus_dev = nsim_dev->nsim_bus_dev;
984 struct devlink *devlink;
985 int err;
986
987 devlink = priv_to_devlink(nsim_dev);
988 nsim_dev = devlink_priv(devlink);
989 INIT_LIST_HEAD(&nsim_dev->port_list);
990 mutex_init(&nsim_dev->port_list_lock);
991 nsim_dev->fw_update_status = true;
992
993 nsim_dev->fib_data = nsim_fib_create(devlink, extack);
994 if (IS_ERR(nsim_dev->fib_data))
995 return PTR_ERR(nsim_dev->fib_data);
996
997 nsim_devlink_param_load_driverinit_values(devlink);
998
999 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1000 if (err)
1001 goto err_fib_destroy;
1002
1003 err = nsim_dev_traps_init(devlink);
1004 if (err)
1005 goto err_dummy_region_exit;
1006
1007 err = nsim_dev_health_init(nsim_dev, devlink);
1008 if (err)
1009 goto err_traps_exit;
1010
1011 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1012 if (err)
1013 goto err_health_exit;
1014
1015 nsim_dev->take_snapshot = debugfs_create_file("take_snapshot",
1016 0200,
1017 nsim_dev->ddir,
1018 nsim_dev,
1019 &nsim_dev_take_snapshot_fops);
1020 return 0;
1021
1022err_health_exit:
1023 nsim_dev_health_exit(nsim_dev);
1024err_traps_exit:
1025 nsim_dev_traps_exit(devlink);
1026err_dummy_region_exit:
1027 nsim_dev_dummy_region_exit(nsim_dev);
1028err_fib_destroy:
1029 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1030 return err;
1031}
1032
1033int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
1034{
1035 struct nsim_dev *nsim_dev;
1036 struct devlink *devlink;
1037 int err;
1038
1039 devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev));
1040 if (!devlink)
1041 return -ENOMEM;
1042 devlink_net_set(devlink, nsim_bus_dev->initial_net);
1043 nsim_dev = devlink_priv(devlink);
1044 nsim_dev->nsim_bus_dev = nsim_bus_dev;
1045 nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
1046 get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
1047 INIT_LIST_HEAD(&nsim_dev->port_list);
1048 mutex_init(&nsim_dev->port_list_lock);
1049 nsim_dev->fw_update_status = true;
1050 nsim_dev->max_macs = NSIM_DEV_MAX_MACS_DEFAULT;
1051 nsim_dev->test1 = NSIM_DEV_TEST1_DEFAULT;
1052 spin_lock_init(&nsim_dev->fa_cookie_lock);
1053
1054 dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
1055
1056 err = nsim_dev_resources_register(devlink);
1057 if (err)
1058 goto err_devlink_free;
1059
1060 nsim_dev->fib_data = nsim_fib_create(devlink, NULL);
1061 if (IS_ERR(nsim_dev->fib_data)) {
1062 err = PTR_ERR(nsim_dev->fib_data);
1063 goto err_resources_unregister;
1064 }
1065
1066 err = devlink_register(devlink, &nsim_bus_dev->dev);
1067 if (err)
1068 goto err_fib_destroy;
1069
1070 err = devlink_params_register(devlink, nsim_devlink_params,
1071 ARRAY_SIZE(nsim_devlink_params));
1072 if (err)
1073 goto err_dl_unregister;
1074 nsim_devlink_set_params_init_values(nsim_dev, devlink);
1075
1076 err = nsim_dev_dummy_region_init(nsim_dev, devlink);
1077 if (err)
1078 goto err_params_unregister;
1079
1080 err = nsim_dev_traps_init(devlink);
1081 if (err)
1082 goto err_dummy_region_exit;
1083
1084 err = nsim_dev_debugfs_init(nsim_dev);
1085 if (err)
1086 goto err_traps_exit;
1087
1088 err = nsim_dev_health_init(nsim_dev, devlink);
1089 if (err)
1090 goto err_debugfs_exit;
1091
1092 err = nsim_bpf_dev_init(nsim_dev);
1093 if (err)
1094 goto err_health_exit;
1095
1096 err = nsim_dev_port_add_all(nsim_dev, nsim_bus_dev->port_count);
1097 if (err)
1098 goto err_bpf_dev_exit;
1099
1100 devlink_params_publish(devlink);
1101 devlink_reload_enable(devlink);
1102 return 0;
1103
1104err_bpf_dev_exit:
1105 nsim_bpf_dev_exit(nsim_dev);
1106err_health_exit:
1107 nsim_dev_health_exit(nsim_dev);
1108err_debugfs_exit:
1109 nsim_dev_debugfs_exit(nsim_dev);
1110err_traps_exit:
1111 nsim_dev_traps_exit(devlink);
1112err_dummy_region_exit:
1113 nsim_dev_dummy_region_exit(nsim_dev);
1114err_params_unregister:
1115 devlink_params_unregister(devlink, nsim_devlink_params,
1116 ARRAY_SIZE(nsim_devlink_params));
1117err_dl_unregister:
1118 devlink_unregister(devlink);
1119err_fib_destroy:
1120 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1121err_resources_unregister:
1122 devlink_resources_unregister(devlink, NULL);
1123err_devlink_free:
1124 devlink_free(devlink);
1125 return err;
1126}
1127
1128static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
1129{
1130 struct devlink *devlink = priv_to_devlink(nsim_dev);
1131
1132 if (devlink_is_reload_failed(devlink))
1133 return;
1134 debugfs_remove(nsim_dev->take_snapshot);
1135 nsim_dev_port_del_all(nsim_dev);
1136 nsim_dev_health_exit(nsim_dev);
1137 nsim_dev_traps_exit(devlink);
1138 nsim_dev_dummy_region_exit(nsim_dev);
1139 mutex_destroy(&nsim_dev->port_list_lock);
1140 nsim_fib_destroy(devlink, nsim_dev->fib_data);
1141}
1142
1143void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev)
1144{
1145 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1146 struct devlink *devlink = priv_to_devlink(nsim_dev);
1147
1148 devlink_reload_disable(devlink);
1149
1150 nsim_dev_reload_destroy(nsim_dev);
1151
1152 nsim_bpf_dev_exit(nsim_dev);
1153 nsim_dev_debugfs_exit(nsim_dev);
1154 devlink_params_unregister(devlink, nsim_devlink_params,
1155 ARRAY_SIZE(nsim_devlink_params));
1156 devlink_unregister(devlink);
1157 devlink_resources_unregister(devlink, NULL);
1158 devlink_free(devlink);
1159}
1160
1161static struct nsim_dev_port *
1162__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index)
1163{
1164 struct nsim_dev_port *nsim_dev_port;
1165
1166 list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
1167 if (nsim_dev_port->port_index == port_index)
1168 return nsim_dev_port;
1169 return NULL;
1170}
1171
1172int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
1173 unsigned int port_index)
1174{
1175 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1176 int err;
1177
1178 mutex_lock(&nsim_dev->port_list_lock);
1179 if (__nsim_dev_port_lookup(nsim_dev, port_index))
1180 err = -EEXIST;
1181 else
1182 err = __nsim_dev_port_add(nsim_dev, port_index);
1183 mutex_unlock(&nsim_dev->port_list_lock);
1184 return err;
1185}
1186
1187int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
1188 unsigned int port_index)
1189{
1190 struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
1191 struct nsim_dev_port *nsim_dev_port;
1192 int err = 0;
1193
1194 mutex_lock(&nsim_dev->port_list_lock);
1195 nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index);
1196 if (!nsim_dev_port)
1197 err = -ENOENT;
1198 else
1199 __nsim_dev_port_del(nsim_dev_port);
1200 mutex_unlock(&nsim_dev->port_list_lock);
1201 return err;
1202}
1203
1204int nsim_dev_init(void)
1205{
1206 nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
1207 return PTR_ERR_OR_ZERO(nsim_dev_ddir);
1208}
1209
1210void nsim_dev_exit(void)
1211{
1212 debugfs_remove_recursive(nsim_dev_ddir);
1213}
1214
