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8322 nl: misleading-indentation
[unleashed/tickless.git] / usr / src / cmd / rcm_daemon / common / vlan_rcm.c
blob61ab2ba5e4ec3f163b56de04b6e2fa7f4880b04a
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 /*
26 * This RCM module adds support to the RCM framework for VLAN links
27 */
28
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <errno.h>
33 #include <sys/types.h>
34 #include <synch.h>
35 #include <assert.h>
36 #include <strings.h>
37 #include "rcm_module.h"
38 #include <libintl.h>
39 #include <libdllink.h>
40 #include <libdlvlan.h>
41 #include <libdlpi.h>
42
43 /*
44 * Definitions
45 */
46 #ifndef lint
47 #define _(x) gettext(x)
48 #else
49 #define _(x) x
50 #endif
51
52 /* Some generic well-knowns and defaults used in this module */
53 #define RCM_LINK_PREFIX "SUNW_datalink" /* RCM datalink name prefix */
54 #define RCM_LINK_RESOURCE_MAX (13 + LINKID_STR_WIDTH)
55
56 /* VLAN link flags */
57 typedef enum {
58 VLAN_OFFLINED = 0x1,
59 VLAN_CONSUMER_OFFLINED = 0x2,
60 VLAN_STALE = 0x4
61 } vlan_flag_t;
62
63 /* link representation */
64 typedef struct dl_vlan {
65 struct dl_vlan *dv_next; /* next VLAN on the same link */
66 struct dl_vlan *dv_prev; /* prev VLAN on the same link */
67 datalink_id_t dv_vlanid;
68 vlan_flag_t dv_flags; /* VLAN link flags */
69 } dl_vlan_t;
70
71 /* VLAN Cache state flags */
72 typedef enum {
73 CACHE_NODE_STALE = 0x1, /* stale cached data */
74 CACHE_NODE_NEW = 0x2, /* new cached nodes */
75 CACHE_NODE_OFFLINED = 0x4 /* nodes offlined */
76 } cache_node_state_t;
77
78 /* Network Cache lookup options */
79 #define CACHE_NO_REFRESH 0x1 /* cache refresh not needed */
80 #define CACHE_REFRESH 0x2 /* refresh cache */
81
82 /* Cache element */
83 typedef struct link_cache {
84 struct link_cache *vc_next; /* next cached resource */
85 struct link_cache *vc_prev; /* prev cached resource */
86 char *vc_resource; /* resource name */
87 datalink_id_t vc_linkid; /* linkid */
88 dl_vlan_t *vc_vlan; /* VLAN list on this link */
89 cache_node_state_t vc_state; /* cache state flags */
90 } link_cache_t;
91
92 /*
93 * Global cache for network VLANs
94 */
95 static link_cache_t cache_head;
96 static link_cache_t cache_tail;
97 static mutex_t cache_lock;
98 static int events_registered = 0;
99
100 static dladm_handle_t dld_handle = NULL;
101
102 /*
103 * RCM module interface prototypes
104 */
105 static int vlan_register(rcm_handle_t *);
106 static int vlan_unregister(rcm_handle_t *);
107 static int vlan_get_info(rcm_handle_t *, char *, id_t, uint_t,
108 char **, char **, nvlist_t *, rcm_info_t **);
109 static int vlan_suspend(rcm_handle_t *, char *, id_t,
110 timespec_t *, uint_t, char **, rcm_info_t **);
111 static int vlan_resume(rcm_handle_t *, char *, id_t, uint_t,
112 char **, rcm_info_t **);
113 static int vlan_offline(rcm_handle_t *, char *, id_t, uint_t,
114 char **, rcm_info_t **);
115 static int vlan_undo_offline(rcm_handle_t *, char *, id_t, uint_t,
116 char **, rcm_info_t **);
117 static int vlan_remove(rcm_handle_t *, char *, id_t, uint_t,
118 char **, rcm_info_t **);
119 static int vlan_notify_event(rcm_handle_t *, char *, id_t, uint_t,
120 char **, nvlist_t *, rcm_info_t **);
121 static int vlan_configure(rcm_handle_t *, datalink_id_t);
122
123 /* Module private routines */
124 static void cache_free();
125 static int cache_update(rcm_handle_t *);
126 static void cache_remove(link_cache_t *);
127 static void node_free(link_cache_t *);
128 static void cache_insert(link_cache_t *);
129 static link_cache_t *cache_lookup(rcm_handle_t *, char *, char);
130 static int vlan_consumer_offline(rcm_handle_t *, link_cache_t *,
131 char **, uint_t, rcm_info_t **);
132 static void vlan_consumer_online(rcm_handle_t *, link_cache_t *,
133 char **, uint_t, rcm_info_t **);
134 static int vlan_offline_vlan(link_cache_t *, uint32_t,
135 cache_node_state_t);
136 static void vlan_online_vlan(link_cache_t *);
137 static char *vlan_usage(link_cache_t *);
138 static void vlan_log_err(datalink_id_t, char **, char *);
139 static int vlan_consumer_notify(rcm_handle_t *, datalink_id_t,
140 char **, uint_t, rcm_info_t **);
141
142 /* Module-Private data */
143 static struct rcm_mod_ops vlan_ops =
144 {
145 RCM_MOD_OPS_VERSION,
146 vlan_register,
147 vlan_unregister,
148 vlan_get_info,
149 vlan_suspend,
150 vlan_resume,
151 vlan_offline,
152 vlan_undo_offline,
153 vlan_remove,
154 NULL,
155 NULL,
156 vlan_notify_event
157 };
158
159 /*
160 * rcm_mod_init() - Update registrations, and return the ops structure.
161 */
162 struct rcm_mod_ops *
163 rcm_mod_init(void)
164 {
165 dladm_status_t status;
166 char errmsg[DLADM_STRSIZE];
167
168 rcm_log_message(RCM_TRACE1, "VLAN: mod_init\n");
169
170 cache_head.vc_next = &cache_tail;
171 cache_head.vc_prev = NULL;
172 cache_tail.vc_prev = &cache_head;
173 cache_tail.vc_next = NULL;
174 (void) mutex_init(&cache_lock, 0, NULL);
175
176 if ((status = dladm_open(&dld_handle)) != DLADM_STATUS_OK) {
177 rcm_log_message(RCM_WARNING,
178 "VLAN: mod_init failed: cannot open datalink handle: %s\n",
179 dladm_status2str(status, errmsg));
180 return (NULL);
181 }
182
183 /* Return the ops vectors */
184 return (&vlan_ops);
185 }
186
187 /*
188 * rcm_mod_info() - Return a string describing this module.
189 */
190 const char *
191 rcm_mod_info(void)
192 {
193 rcm_log_message(RCM_TRACE1, "VLAN: mod_info\n");
194
195 return ("VLAN module version 1.2");
196 }
197
198 /*
199 * rcm_mod_fini() - Destroy the network VLAN cache.
200 */
201 int
202 rcm_mod_fini(void)
203 {
204 rcm_log_message(RCM_TRACE1, "VLAN: mod_fini\n");
205
206 /*
207 * Note that vlan_unregister() does not seem to be called anywhere,
208 * therefore we free the cache nodes here. In theory we should call
209 * rcm_register_interest() for each node before we free it, the
210 * framework does not provide the rcm_handle to allow us to do so.
211 */
212 cache_free();
213 (void) mutex_destroy(&cache_lock);
214
215 dladm_close(dld_handle);
216 return (RCM_SUCCESS);
217 }
218
219 /*
220 * vlan_register() - Make sure the cache is properly sync'ed, and its
221 * registrations are in order.
222 */
223 static int
224 vlan_register(rcm_handle_t *hd)
225 {
226 rcm_log_message(RCM_TRACE1, "VLAN: register\n");
227
228 if (cache_update(hd) < 0)
229 return (RCM_FAILURE);
230
231 /*
232 * Need to register interest in all new resources
233 * getting attached, so we get attach event notifications
234 */
235 if (!events_registered) {
236 if (rcm_register_event(hd, RCM_RESOURCE_LINK_NEW, 0, NULL)
237 != RCM_SUCCESS) {
238 rcm_log_message(RCM_ERROR,
239 _("VLAN: failed to register %s\n"),
240 RCM_RESOURCE_LINK_NEW);
241 return (RCM_FAILURE);
242 } else {
243 rcm_log_message(RCM_DEBUG, "VLAN: registered %s\n",
244 RCM_RESOURCE_LINK_NEW);
245 events_registered++;
246 }
247 }
248
249 return (RCM_SUCCESS);
250 }
251
252 /*
253 * vlan_unregister() - Walk the cache, unregistering all the networks.
254 */
255 static int
256 vlan_unregister(rcm_handle_t *hd)
257 {
258 link_cache_t *node;
259
260 rcm_log_message(RCM_TRACE1, "VLAN: unregister\n");
261
262 /* Walk the cache, unregistering everything */
263 (void) mutex_lock(&cache_lock);
264 node = cache_head.vc_next;
265 while (node != &cache_tail) {
266 if (rcm_unregister_interest(hd, node->vc_resource, 0)
267 != RCM_SUCCESS) {
268 rcm_log_message(RCM_ERROR,
269 _("VLAN: failed to unregister %s\n"),
270 node->vc_resource);
271 (void) mutex_unlock(&cache_lock);
272 return (RCM_FAILURE);
273 }
274 cache_remove(node);
275 node_free(node);
276 node = cache_head.vc_next;
277 }
278 (void) mutex_unlock(&cache_lock);
279
280 /*
281 * Unregister interest in all new resources
282 */
283 if (events_registered) {
284 if (rcm_unregister_event(hd, RCM_RESOURCE_LINK_NEW, 0)
285 != RCM_SUCCESS) {
286 rcm_log_message(RCM_ERROR,
287 _("VLAN: failed to unregister %s\n"),
288 RCM_RESOURCE_LINK_NEW);
289 return (RCM_FAILURE);
290 } else {
291 rcm_log_message(RCM_DEBUG, "VLAN: unregistered %s\n",
292 RCM_RESOURCE_LINK_NEW);
293 events_registered--;
294 }
295 }
296
297 return (RCM_SUCCESS);
298 }
299
300 /*
301 * vlan_offline() - Offline VLANs on a specific node.
302 */
303 static int
304 vlan_offline(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
305 char **errorp, rcm_info_t **info)
306 {
307 link_cache_t *node;
308
309 rcm_log_message(RCM_TRACE1, "VLAN: offline(%s)\n", rsrc);
310
311 /* Lock the cache and lookup the resource */
312 (void) mutex_lock(&cache_lock);
313 node = cache_lookup(hd, rsrc, CACHE_REFRESH);
314 if (node == NULL) {
315 /* should not happen because the resource is registered. */
316 vlan_log_err(DATALINK_INVALID_LINKID, errorp,
317 "unrecognized resource");
318 (void) mutex_unlock(&cache_lock);
319 return (RCM_SUCCESS);
320 }
321
322 /*
323 * Inform consumers (IP interfaces) of associated VLANs to be offlined
324 */
325 if (vlan_consumer_offline(hd, node, errorp, flags, info) ==
326 RCM_SUCCESS) {
327 rcm_log_message(RCM_DEBUG,
328 "VLAN: consumers agreed on offline\n");
329 } else {
330 vlan_log_err(node->vc_linkid, errorp,
331 "consumers failed to offline");
332 (void) mutex_unlock(&cache_lock);
333 return (RCM_FAILURE);
334 }
335
336 /* Check if it's a query */
337 if (flags & RCM_QUERY) {
338 rcm_log_message(RCM_TRACE1,
339 "VLAN: offline query succeeded(%s)\n", rsrc);
340 (void) mutex_unlock(&cache_lock);
341 return (RCM_SUCCESS);
342 }
343
344 if (vlan_offline_vlan(node, VLAN_OFFLINED, CACHE_NODE_OFFLINED) !=
345 RCM_SUCCESS) {
346 vlan_online_vlan(node);
347 vlan_log_err(node->vc_linkid, errorp, "offline failed");
348 (void) mutex_unlock(&cache_lock);
349 return (RCM_FAILURE);
350 }
351
352 rcm_log_message(RCM_TRACE1, "VLAN: Offline succeeded(%s)\n", rsrc);
353 (void) mutex_unlock(&cache_lock);
354 return (RCM_SUCCESS);
355 }
356
357 /*
358 * vlan_undo_offline() - Undo offline of a previously offlined node.
359 */
360 /*ARGSUSED*/
361 static int
362 vlan_undo_offline(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
363 char **errorp, rcm_info_t **info)
364 {
365 link_cache_t *node;
366
367 rcm_log_message(RCM_TRACE1, "VLAN: online(%s)\n", rsrc);
368
369 (void) mutex_lock(&cache_lock);
370 node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH);
371 if (node == NULL) {
372 vlan_log_err(DATALINK_INVALID_LINKID, errorp, "no such link");
373 (void) mutex_unlock(&cache_lock);
374 errno = ENOENT;
375 return (RCM_FAILURE);
376 }
377
378 /* Check if no attempt should be made to online the link here */
379 if (!(node->vc_state & CACHE_NODE_OFFLINED)) {
380 vlan_log_err(node->vc_linkid, errorp, "link not offlined");
381 (void) mutex_unlock(&cache_lock);
382 errno = ENOTSUP;
383 return (RCM_SUCCESS);
384 }
385
386 vlan_online_vlan(node);
387
388 /*
389 * Inform IP interfaces on associated VLANs to be onlined
390 */
391 vlan_consumer_online(hd, node, errorp, flags, info);
392
393 node->vc_state &= ~CACHE_NODE_OFFLINED;
394 rcm_log_message(RCM_TRACE1, "VLAN: online succeeded(%s)\n", rsrc);
395 (void) mutex_unlock(&cache_lock);
396 return (RCM_SUCCESS);
397 }
398
399 static void
400 vlan_online_vlan(link_cache_t *node)
401 {
402 dl_vlan_t *vlan;
403 dladm_status_t status;
404 char errmsg[DLADM_STRSIZE];
405
406 /*
407 * Try to bring on all offlined VLANs
408 */
409 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
410 if (!(vlan->dv_flags & VLAN_OFFLINED))
411 continue;
412
413 if ((status = dladm_vlan_up(dld_handle, vlan->dv_vlanid)) !=
414 DLADM_STATUS_OK) {
415 /*
416 * Print a warning message and continue to online
417 * other VLANs.
418 */
419 rcm_log_message(RCM_WARNING,
420 _("VLAN: VLAN online failed (%u): %s\n"),
421 vlan->dv_vlanid, dladm_status2str(status, errmsg));
422 } else {
423 vlan->dv_flags &= ~VLAN_OFFLINED;
424 }
425 }
426 }
427
428 static int
429 vlan_offline_vlan(link_cache_t *node, uint32_t flags, cache_node_state_t state)
430 {
431 dl_vlan_t *vlan;
432 dladm_status_t status;
433 char errmsg[DLADM_STRSIZE];
434
435 rcm_log_message(RCM_TRACE2, "VLAN: vlan_offline_vlan (%s %u %u)\n",
436 node->vc_resource, flags, state);
437
438 /*
439 * Try to delete all explicit created VLAN
440 */
441 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
442 if ((status = dladm_vlan_delete(dld_handle, vlan->dv_vlanid,
443 DLADM_OPT_ACTIVE)) != DLADM_STATUS_OK) {
444 rcm_log_message(RCM_WARNING,
445 _("VLAN: VLAN offline failed (%u): %s\n"),
446 vlan->dv_vlanid, dladm_status2str(status, errmsg));
447 return (RCM_FAILURE);
448 } else {
449 rcm_log_message(RCM_TRACE1,
450 "VLAN: VLAN offline succeeded(%u)\n",
451 vlan->dv_vlanid);
452 vlan->dv_flags |= flags;
453 }
454 }
455
456 node->vc_state |= state;
457 return (RCM_SUCCESS);
458 }
459
460 /*
461 * vlan_get_info() - Gather usage information for this resource.
462 */
463 /*ARGSUSED*/
464 int
465 vlan_get_info(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
466 char **usagep, char **errorp, nvlist_t *props, rcm_info_t **info)
467 {
468 link_cache_t *node;
469
470 rcm_log_message(RCM_TRACE1, "VLAN: get_info(%s)\n", rsrc);
471
472 (void) mutex_lock(&cache_lock);
473 node = cache_lookup(hd, rsrc, CACHE_REFRESH);
474 if (node == NULL) {
475 rcm_log_message(RCM_INFO,
476 _("VLAN: get_info(%s) unrecognized resource\n"), rsrc);
477 (void) mutex_unlock(&cache_lock);
478 errno = ENOENT;
479 return (RCM_FAILURE);
480 }
481
482 *usagep = vlan_usage(node);
483 (void) mutex_unlock(&cache_lock);
484 if (*usagep == NULL) {
485 /* most likely malloc failure */
486 rcm_log_message(RCM_ERROR,
487 _("VLAN: get_info(%s) malloc failure\n"), rsrc);
488 (void) mutex_unlock(&cache_lock);
489 errno = ENOMEM;
490 return (RCM_FAILURE);
491 }
492
493 /* Set client/role properties */
494 (void) nvlist_add_string(props, RCM_CLIENT_NAME, "VLAN");
495
496 rcm_log_message(RCM_TRACE1, "VLAN: get_info(%s) info = %s\n",
497 rsrc, *usagep);
498 return (RCM_SUCCESS);
499 }
500
501 /*
502 * vlan_suspend() - Nothing to do, always okay
503 */
504 /*ARGSUSED*/
505 static int
506 vlan_suspend(rcm_handle_t *hd, char *rsrc, id_t id, timespec_t *interval,
507 uint_t flags, char **errorp, rcm_info_t **info)
508 {
509 rcm_log_message(RCM_TRACE1, "VLAN: suspend(%s)\n", rsrc);
510 return (RCM_SUCCESS);
511 }
512
513 /*
514 * vlan_resume() - Nothing to do, always okay
515 */
516 /*ARGSUSED*/
517 static int
518 vlan_resume(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
519 char **errorp, rcm_info_t **info)
520 {
521 rcm_log_message(RCM_TRACE1, "VLAN: resume(%s)\n", rsrc);
522 return (RCM_SUCCESS);
523 }
524
525 /*
526 * vlan_consumer_remove()
527 *
528 * Notify VLAN consumers to remove cache.
529 */
530 static int
531 vlan_consumer_remove(rcm_handle_t *hd, link_cache_t *node, uint_t flags,
532 rcm_info_t **info)
533 {
534 dl_vlan_t *vlan = NULL;
535 char rsrc[RCM_LINK_RESOURCE_MAX];
536 int ret = RCM_SUCCESS;
537
538 rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_remove (%s)\n",
539 node->vc_resource);
540
541 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
542
543 /*
544 * This will only be called when the offline operation
545 * succeeds, so the VLAN consumers must have been offlined
546 * at this point.
547 */
548 assert(vlan->dv_flags & VLAN_CONSUMER_OFFLINED);
549
550 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
551 RCM_LINK_PREFIX, vlan->dv_vlanid);
552
553 ret = rcm_notify_remove(hd, rsrc, flags, info);
554 if (ret != RCM_SUCCESS) {
555 rcm_log_message(RCM_WARNING,
556 _("VLAN: notify remove failed (%s)\n"), rsrc);
557 break;
558 }
559 }
560
561 rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_remove done\n");
562 return (ret);
563 }
564
565 /*
566 * vlan_remove() - remove a resource from cache
567 */
568 /*ARGSUSED*/
569 static int
570 vlan_remove(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
571 char **errorp, rcm_info_t **info)
572 {
573 link_cache_t *node;
574 int rv;
575
576 rcm_log_message(RCM_TRACE1, "VLAN: remove(%s)\n", rsrc);
577
578 (void) mutex_lock(&cache_lock);
579 node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH);
580 if (node == NULL) {
581 rcm_log_message(RCM_INFO,
582 _("VLAN: remove(%s) unrecognized resource\n"), rsrc);
583 (void) mutex_unlock(&cache_lock);
584 errno = ENOENT;
585 return (RCM_FAILURE);
586 }
587
588 /* remove the cached entry for the resource */
589 cache_remove(node);
590 (void) mutex_unlock(&cache_lock);
591
592 rv = vlan_consumer_remove(hd, node, flags, info);
593 node_free(node);
594 return (rv);
595 }
596
597 /*
598 * vlan_notify_event - Project private implementation to receive new resource
599 * events. It intercepts all new resource events. If the
600 * new resource is a network resource, pass up a notify
601 * for it too. The new resource need not be cached, since
602 * it is done at register again.
603 */
604 /*ARGSUSED*/
605 static int
606 vlan_notify_event(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
607 char **errorp, nvlist_t *nvl, rcm_info_t **info)
608 {
609 nvpair_t *nvp = NULL;
610 datalink_id_t linkid;
611 uint64_t id64;
612 int rv = RCM_SUCCESS;
613
614 rcm_log_message(RCM_TRACE1, "VLAN: notify_event(%s)\n", rsrc);
615
616 if (strcmp(rsrc, RCM_RESOURCE_LINK_NEW) != 0) {
617 vlan_log_err(DATALINK_INVALID_LINKID, errorp,
618 "unrecognized event");
619 errno = EINVAL;
620 return (RCM_FAILURE);
621 }
622
623 /* Update cache to reflect latest VLANs */
624 if (cache_update(hd) < 0) {
625 vlan_log_err(DATALINK_INVALID_LINKID, errorp,
626 "private Cache update failed");
627 return (RCM_FAILURE);
628 }
629
630 /*
631 * Try best to recover all configuration.
632 */
633 rcm_log_message(RCM_DEBUG, "VLAN: process_nvlist\n");
634 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
635 if (strcmp(nvpair_name(nvp), RCM_NV_LINKID) != 0)
636 continue;
637
638 if (nvpair_value_uint64(nvp, &id64) != 0) {
639 vlan_log_err(DATALINK_INVALID_LINKID, errorp,
640 "cannot get linkid");
641 rv = RCM_FAILURE;
642 continue;
643 }
644
645 linkid = (datalink_id_t)id64;
646 if (vlan_configure(hd, linkid) != 0) {
647 vlan_log_err(linkid, errorp, "configuring failed");
648 rv = RCM_FAILURE;
649 continue;
650 }
651
652 /* Notify all VLAN consumers */
653 if (vlan_consumer_notify(hd, linkid, errorp, flags,
654 info) != 0) {
655 vlan_log_err(linkid, errorp, "consumer notify failed");
656 rv = RCM_FAILURE;
657 }
658 }
659
660 rcm_log_message(RCM_TRACE1,
661 "VLAN: notify_event: link configuration complete\n");
662 return (rv);
663 }
664
665 /*
666 * vlan_usage - Determine the usage of a link.
667 * The returned buffer is owned by caller, and the caller
668 * must free it up when done.
669 */
670 static char *
671 vlan_usage(link_cache_t *node)
672 {
673 dl_vlan_t *vlan;
674 int nvlan;
675 char *buf;
676 const char *fmt;
677 char *sep;
678 char errmsg[DLADM_STRSIZE];
679 char name[MAXLINKNAMELEN];
680 dladm_status_t status;
681 size_t bufsz;
682
683 rcm_log_message(RCM_TRACE2, "VLAN: usage(%s)\n", node->vc_resource);
684
685 assert(MUTEX_HELD(&cache_lock));
686 if ((status = dladm_datalink_id2info(dld_handle, node->vc_linkid, NULL,
687 NULL, NULL, name, sizeof (name))) != DLADM_STATUS_OK) {
688 rcm_log_message(RCM_ERROR,
689 _("VLAN: usage(%s) get link name failure(%s)\n"),
690 node->vc_resource, dladm_status2str(status, errmsg));
691 return (NULL);
692 }
693
694 if (node->vc_state & CACHE_NODE_OFFLINED)
695 fmt = _("%1$s offlined");
696 else
697 fmt = _("%1$s VLANs: ");
698
699 /* TRANSLATION_NOTE: separator used between VLAN linkids */
700 sep = _(", ");
701
702 nvlan = 0;
703 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next)
704 nvlan++;
705
706 /* space for VLANs and separators, plus message */
707 bufsz = nvlan * (MAXLINKNAMELEN + strlen(sep)) +
708 strlen(fmt) + MAXLINKNAMELEN + 1;
709 if ((buf = malloc(bufsz)) == NULL) {
710 rcm_log_message(RCM_ERROR,
711 _("VLAN: usage(%s) malloc failure(%s)\n"),
712 node->vc_resource, strerror(errno));
713 return (NULL);
714 }
715 (void) snprintf(buf, bufsz, fmt, name);
716
717 if (node->vc_state & CACHE_NODE_OFFLINED) {
718 /* Nothing else to do */
719 rcm_log_message(RCM_TRACE2, "VLAN: usage (%s) info = %s\n",
720 node->vc_resource, buf);
721 return (buf);
722 }
723
724 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
725 rcm_log_message(RCM_DEBUG, "VLAN:= %u\n", vlan->dv_vlanid);
726
727 if ((status = dladm_datalink_id2info(dld_handle,
728 vlan->dv_vlanid, NULL, NULL, NULL, name,
729 sizeof (name))) != DLADM_STATUS_OK) {
730 rcm_log_message(RCM_ERROR,
731 _("VLAN: usage(%s) get vlan %u name failure(%s)\n"),
732 node->vc_resource, vlan->dv_vlanid,
733 dladm_status2str(status, errmsg));
734 free(buf);
735 return (NULL);
736 }
737
738 (void) strlcat(buf, name, bufsz);
739 if (vlan->dv_next != NULL)
740 (void) strlcat(buf, sep, bufsz);
741 }
742
743 rcm_log_message(RCM_TRACE2, "VLAN: usage (%s) info = %s\n",
744 node->vc_resource, buf);
745
746 return (buf);
747 }
748
749 /*
750 * Cache management routines, all cache management functions should be
751 * be called with cache_lock held.
752 */
753
754 /*
755 * cache_lookup() - Get a cache node for a resource.
756 * Call with cache lock held.
757 *
758 * This ensures that the cache is consistent with the system state and
759 * returns a pointer to the cache element corresponding to the resource.
760 */
761 static link_cache_t *
762 cache_lookup(rcm_handle_t *hd, char *rsrc, char options)
763 {
764 link_cache_t *node;
765
766 rcm_log_message(RCM_TRACE2, "VLAN: cache lookup(%s)\n", rsrc);
767
768 assert(MUTEX_HELD(&cache_lock));
769 if (options & CACHE_REFRESH) {
770 /* drop lock since update locks cache again */
771 (void) mutex_unlock(&cache_lock);
772 (void) cache_update(hd);
773 (void) mutex_lock(&cache_lock);
774 }
775
776 node = cache_head.vc_next;
777 for (; node != &cache_tail; node = node->vc_next) {
778 if (strcmp(rsrc, node->vc_resource) == 0) {
779 rcm_log_message(RCM_TRACE2,
780 "VLAN: cache lookup succeeded(%s)\n", rsrc);
781 return (node);
782 }
783 }
784 return (NULL);
785 }
786
787 /*
788 * node_free - Free a node from the cache
789 */
790 static void
791 node_free(link_cache_t *node)
792 {
793 dl_vlan_t *vlan, *next;
794
795 if (node != NULL) {
796 free(node->vc_resource);
797
798 /* free the VLAN list */
799 for (vlan = node->vc_vlan; vlan != NULL; vlan = next) {
800 next = vlan->dv_next;
801 free(vlan);
802 }
803 free(node);
804 }
805 }
806
807 /*
808 * cache_insert - Insert a resource node in cache
809 */
810 static void
811 cache_insert(link_cache_t *node)
812 {
813 assert(MUTEX_HELD(&cache_lock));
814
815 /* insert at the head for best performance */
816 node->vc_next = cache_head.vc_next;
817 node->vc_prev = &cache_head;
818
819 node->vc_next->vc_prev = node;
820 node->vc_prev->vc_next = node;
821 }
822
823 /*
824 * cache_remove() - Remove a resource node from cache.
825 */
826 static void
827 cache_remove(link_cache_t *node)
828 {
829 assert(MUTEX_HELD(&cache_lock));
830 node->vc_next->vc_prev = node->vc_prev;
831 node->vc_prev->vc_next = node->vc_next;
832 node->vc_next = NULL;
833 node->vc_prev = NULL;
834 }
835
836 typedef struct vlan_update_arg_s {
837 rcm_handle_t *hd;
838 int retval;
839 } vlan_update_arg_t;
840
841 /*
842 * vlan_update() - Update physical interface properties
843 */
844 static int
845 vlan_update(dladm_handle_t handle, datalink_id_t vlanid, void *arg)
846 {
847 vlan_update_arg_t *vlan_update_argp = arg;
848 rcm_handle_t *hd = vlan_update_argp->hd;
849 link_cache_t *node;
850 dl_vlan_t *vlan;
851 char *rsrc;
852 dladm_vlan_attr_t vlan_attr;
853 dladm_status_t status;
854 char errmsg[DLADM_STRSIZE];
855 boolean_t newnode = B_FALSE;
856 int ret = -1;
857
858 rcm_log_message(RCM_TRACE2, "VLAN: vlan_update(%u)\n", vlanid);
859
860 assert(MUTEX_HELD(&cache_lock));
861 status = dladm_vlan_info(handle, vlanid, &vlan_attr, DLADM_OPT_ACTIVE);
862 if (status != DLADM_STATUS_OK) {
863 rcm_log_message(RCM_TRACE1,
864 "VLAN: vlan_update() cannot get vlan information for "
865 "%u(%s)\n", vlanid, dladm_status2str(status, errmsg));
866 return (DLADM_WALK_CONTINUE);
867 }
868
869 rsrc = malloc(RCM_LINK_RESOURCE_MAX);
870 if (rsrc == NULL) {
871 rcm_log_message(RCM_ERROR, _("VLAN: malloc error(%s): %u\n"),
872 strerror(errno), vlanid);
873 goto done;
874 }
875
876 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
877 RCM_LINK_PREFIX, vlan_attr.dv_linkid);
878
879 node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH);
880 if (node != NULL) {
881 rcm_log_message(RCM_DEBUG,
882 "VLAN: %s already registered (vlanid:%d)\n",
883 rsrc, vlan_attr.dv_vid);
884 free(rsrc);
885 } else {
886 rcm_log_message(RCM_DEBUG,
887 "VLAN: %s is a new resource (vlanid:%d)\n",
888 rsrc, vlan_attr.dv_vid);
889 if ((node = calloc(1, sizeof (link_cache_t))) == NULL) {
890 free(rsrc);
891 rcm_log_message(RCM_ERROR, _("VLAN: calloc: %s\n"),
892 strerror(errno));
893 goto done;
894 }
895
896 node->vc_resource = rsrc;
897 node->vc_vlan = NULL;
898 node->vc_linkid = vlan_attr.dv_linkid;
899 node->vc_state |= CACHE_NODE_NEW;
900 newnode = B_TRUE;
901 }
902
903 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
904 if (vlan->dv_vlanid == vlanid) {
905 vlan->dv_flags &= ~VLAN_STALE;
906 break;
907 }
908 }
909
910 if (vlan == NULL) {
911 if ((vlan = calloc(1, sizeof (dl_vlan_t))) == NULL) {
912 rcm_log_message(RCM_ERROR, _("VLAN: malloc: %s\n"),
913 strerror(errno));
914 if (newnode) {
915 free(rsrc);
916 free(node);
917 }
918 goto done;
919 }
920 vlan->dv_vlanid = vlanid;
921 vlan->dv_next = node->vc_vlan;
922 vlan->dv_prev = NULL;
923 if (node->vc_vlan != NULL)
924 node->vc_vlan->dv_prev = vlan;
925 node->vc_vlan = vlan;
926 }
927
928 node->vc_state &= ~CACHE_NODE_STALE;
929
930 if (newnode)
931 cache_insert(node);
932
933 rcm_log_message(RCM_TRACE3, "VLAN: vlan_update: succeeded(%u)\n",
934 vlanid);
935 ret = 0;
936 done:
937 vlan_update_argp->retval = ret;
938 return (ret == 0 ? DLADM_WALK_CONTINUE : DLADM_WALK_TERMINATE);
939 }
940
941 /*
942 * vlan_update_all() - Determine all VLAN links in the system
943 */
944 static int
945 vlan_update_all(rcm_handle_t *hd)
946 {
947 vlan_update_arg_t arg = {NULL, 0};
948
949 rcm_log_message(RCM_TRACE2, "VLAN: vlan_update_all\n");
950
951 assert(MUTEX_HELD(&cache_lock));
952 arg.hd = hd;
953 (void) dladm_walk_datalink_id(vlan_update, dld_handle, &arg,
954 DATALINK_CLASS_VLAN, DATALINK_ANY_MEDIATYPE, DLADM_OPT_ACTIVE);
955 return (arg.retval);
956 }
957
958 /*
959 * cache_update() - Update cache with latest interface info
960 */
961 static int
962 cache_update(rcm_handle_t *hd)
963 {
964 link_cache_t *node, *nnode;
965 dl_vlan_t *vlan;
966 int rv;
967
968 rcm_log_message(RCM_TRACE2, "VLAN: cache_update\n");
969
970 (void) mutex_lock(&cache_lock);
971
972 /* first we walk the entire cache, marking each entry stale */
973 node = cache_head.vc_next;
974 for (; node != &cache_tail; node = node->vc_next) {
975 node->vc_state |= CACHE_NODE_STALE;
976 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next)
977 vlan->dv_flags |= VLAN_STALE;
978 }
979
980 rv = vlan_update_all(hd);
981
982 /*
983 * Continue to delete all stale nodes from the cache even
984 * vlan_update_all() failed. Unregister link that are not offlined
985 * and still in cache
986 */
987 for (node = cache_head.vc_next; node != &cache_tail; node = nnode) {
988 dl_vlan_t *vlan, *next;
989
990 for (vlan = node->vc_vlan; vlan != NULL; vlan = next) {
991 next = vlan->dv_next;
992
993 /* clear stale VLANs */
994 if (vlan->dv_flags & VLAN_STALE) {
995 if (vlan->dv_prev != NULL)
996 vlan->dv_prev->dv_next = next;
997 else
998 node->vc_vlan = next;
999
1000 if (next != NULL)
1001 next->dv_prev = vlan->dv_prev;
1002 free(vlan);
1003 }
1004 }
1005
1006 nnode = node->vc_next;
1007 if (node->vc_state & CACHE_NODE_STALE) {
1008 (void) rcm_unregister_interest(hd, node->vc_resource,
1009 0);
1010 rcm_log_message(RCM_DEBUG, "VLAN: unregistered %s\n",
1011 node->vc_resource);
1012 assert(node->vc_vlan == NULL);
1013 cache_remove(node);
1014 node_free(node);
1015 continue;
1016 }
1017
1018 if (!(node->vc_state & CACHE_NODE_NEW))
1019 continue;
1020
1021 if (rcm_register_interest(hd, node->vc_resource, 0, NULL) !=
1022 RCM_SUCCESS) {
1023 rcm_log_message(RCM_ERROR,
1024 _("VLAN: failed to register %s\n"),
1025 node->vc_resource);
1026 rv = -1;
1027 } else {
1028 rcm_log_message(RCM_DEBUG, "VLAN: registered %s\n",
1029 node->vc_resource);
1030 node->vc_state &= ~CACHE_NODE_NEW;
1031 }
1032 }
1033
1034 (void) mutex_unlock(&cache_lock);
1035 return (rv);
1036 }
1037
1038 /*
1039 * cache_free() - Empty the cache
1040 */
1041 static void
1042 cache_free()
1043 {
1044 link_cache_t *node;
1045
1046 rcm_log_message(RCM_TRACE2, "VLAN: cache_free\n");
1047
1048 (void) mutex_lock(&cache_lock);
1049 node = cache_head.vc_next;
1050 while (node != &cache_tail) {
1051 cache_remove(node);
1052 node_free(node);
1053 node = cache_head.vc_next;
1054 }
1055 (void) mutex_unlock(&cache_lock);
1056 }
1057
1058 /*
1059 * vlan_log_err() - RCM error log wrapper
1060 */
1061 static void
1062 vlan_log_err(datalink_id_t linkid, char **errorp, char *errmsg)
1063 {
1064 char link[MAXLINKNAMELEN];
1065 char errstr[DLADM_STRSIZE];
1066 dladm_status_t status;
1067 int len;
1068 const char *errfmt;
1069 char *error;
1070
1071 link[0] = '\0';
1072 if (linkid != DATALINK_INVALID_LINKID) {
1073 char rsrc[RCM_LINK_RESOURCE_MAX];
1074
1075 (void) snprintf(rsrc, sizeof (rsrc), "%s/%u",
1076 RCM_LINK_PREFIX, linkid);
1077
1078 rcm_log_message(RCM_ERROR, _("VLAN: %s(%s)\n"), errmsg, rsrc);
1079 if ((status = dladm_datalink_id2info(dld_handle, linkid, NULL,
1080 NULL, NULL, link, sizeof (link))) != DLADM_STATUS_OK) {
1081 rcm_log_message(RCM_WARNING,
1082 _("VLAN: cannot get link name for (%s) %s\n"),
1083 rsrc, dladm_status2str(status, errstr));
1084 }
1085 } else {
1086 rcm_log_message(RCM_ERROR, _("VLAN: %s\n"), errmsg);
1087 }
1088
1089 errfmt = strlen(link) > 0 ? _("VLAN: %s(%s)") : _("VLAN: %s");
1090 len = strlen(errfmt) + strlen(errmsg) + MAXLINKNAMELEN + 1;
1091 if ((error = malloc(len)) != NULL) {
1092 if (strlen(link) > 0)
1093 (void) snprintf(error, len, errfmt, errmsg, link);
1094 else
1095 (void) snprintf(error, len, errfmt, errmsg);
1096 }
1097
1098 if (errorp != NULL)
1099 *errorp = error;
1100 }
1101
1102 /*
1103 * vlan_consumer_online()
1104 *
1105 * Notify online to VLAN consumers.
1106 */
1107 /* ARGSUSED */
1108 static void
1109 vlan_consumer_online(rcm_handle_t *hd, link_cache_t *node, char **errorp,
1110 uint_t flags, rcm_info_t **info)
1111 {
1112 dl_vlan_t *vlan;
1113 char rsrc[RCM_LINK_RESOURCE_MAX];
1114
1115 rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_online (%s)\n",
1116 node->vc_resource);
1117
1118 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
1119 if (!(vlan->dv_flags & VLAN_CONSUMER_OFFLINED))
1120 continue;
1121
1122 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
1123 RCM_LINK_PREFIX, vlan->dv_vlanid);
1124
1125 if (rcm_notify_online(hd, rsrc, flags, info) == RCM_SUCCESS)
1126 vlan->dv_flags &= ~VLAN_CONSUMER_OFFLINED;
1127 }
1128
1129 rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_online done\n");
1130 }
1131
1132 /*
1133 * vlan_consumer_offline()
1134 *
1135 * Offline VLAN consumers.
1136 */
1137 static int
1138 vlan_consumer_offline(rcm_handle_t *hd, link_cache_t *node, char **errorp,
1139 uint_t flags, rcm_info_t **info)
1140 {
1141 dl_vlan_t *vlan;
1142 char rsrc[RCM_LINK_RESOURCE_MAX];
1143 int ret = RCM_SUCCESS;
1144
1145 rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_offline (%s)\n",
1146 node->vc_resource);
1147
1148 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
1149 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
1150 RCM_LINK_PREFIX, vlan->dv_vlanid);
1151
1152 ret = rcm_request_offline(hd, rsrc, flags, info);
1153 if (ret != RCM_SUCCESS)
1154 break;
1155
1156 vlan->dv_flags |= VLAN_CONSUMER_OFFLINED;
1157 }
1158
1159 if (vlan != NULL)
1160 vlan_consumer_online(hd, node, errorp, flags, info);
1161
1162 rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_offline done\n");
1163 return (ret);
1164 }
1165
1166 /*
1167 * Send RCM_RESOURCE_LINK_NEW events to other modules about new VLANs.
1168 * Return 0 on success, -1 on failure.
1169 */
1170 static int
1171 vlan_notify_new_vlan(rcm_handle_t *hd, char *rsrc)
1172 {
1173 link_cache_t *node;
1174 dl_vlan_t *vlan;
1175 nvlist_t *nvl = NULL;
1176 uint64_t id;
1177 int ret = -1;
1178
1179 rcm_log_message(RCM_TRACE2, "VLAN: vlan_notify_new_vlan (%s)\n", rsrc);
1180
1181 (void) mutex_lock(&cache_lock);
1182 if ((node = cache_lookup(hd, rsrc, CACHE_REFRESH)) == NULL) {
1183 (void) mutex_unlock(&cache_lock);
1184 return (0);
1185 }
1186
1187 if (nvlist_alloc(&nvl, 0, 0) != 0) {
1188 (void) mutex_unlock(&cache_lock);
1189 rcm_log_message(RCM_WARNING,
1190 _("VLAN: failed to allocate nvlist\n"));
1191 goto done;
1192 }
1193
1194 for (vlan = node->vc_vlan; vlan != NULL; vlan = vlan->dv_next) {
1195 rcm_log_message(RCM_TRACE2,
1196 "VLAN: vlan_notify_new_vlan add (%u)\n",
1197 vlan->dv_vlanid);
1198
1199 id = vlan->dv_vlanid;
1200 if (nvlist_add_uint64(nvl, RCM_NV_LINKID, id) != 0) {
1201 rcm_log_message(RCM_ERROR,
1202 _("VLAN: failed to construct nvlist\n"));
1203 (void) mutex_unlock(&cache_lock);
1204 goto done;
1205 }
1206 }
1207 (void) mutex_unlock(&cache_lock);
1208
1209 if (rcm_notify_event(hd, RCM_RESOURCE_LINK_NEW, 0, nvl, NULL) !=
1210 RCM_SUCCESS) {
1211 rcm_log_message(RCM_ERROR,
1212 _("VLAN: failed to notify %s event for %s\n"),
1213 RCM_RESOURCE_LINK_NEW, node->vc_resource);
1214 goto done;
1215 }
1216
1217 ret = 0;
1218 done:
1219 nvlist_free(nvl);
1220 return (ret);
1221 }
1222
1223 /*
1224 * vlan_consumer_notify() - Notify consumers of VLANs coming back online.
1225 */
1226 static int
1227 vlan_consumer_notify(rcm_handle_t *hd, datalink_id_t linkid, char **errorp,
1228 uint_t flags, rcm_info_t **info)
1229 {
1230 char rsrc[RCM_LINK_RESOURCE_MAX];
1231 link_cache_t *node;
1232
1233 /* Check for the interface in the cache */
1234 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u", RCM_LINK_PREFIX,
1235 linkid);
1236
1237 rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_notify(%s)\n", rsrc);
1238
1239 /*
1240 * Inform IP consumers of the new link.
1241 */
1242 if (vlan_notify_new_vlan(hd, rsrc) != 0) {
1243 (void) mutex_lock(&cache_lock);
1244 if ((node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH)) != NULL) {
1245 (void) vlan_offline_vlan(node, VLAN_STALE,
1246 CACHE_NODE_STALE);
1247 }
1248 (void) mutex_unlock(&cache_lock);
1249 rcm_log_message(RCM_TRACE2,
1250 "VLAN: vlan_notify_new_vlan failed(%s)\n", rsrc);
1251 return (-1);
1252 }
1253
1254 rcm_log_message(RCM_TRACE2, "VLAN: vlan_consumer_notify succeeded\n");
1255 return (0);
1256 }
1257
1258 typedef struct vlan_up_arg_s {
1259 datalink_id_t linkid;
1260 int retval;
1261 } vlan_up_arg_t;
1262
1263 static int
1264 vlan_up(dladm_handle_t handle, datalink_id_t vlanid, void *arg)
1265 {
1266 vlan_up_arg_t *vlan_up_argp = arg;
1267 dladm_status_t status;
1268 dladm_vlan_attr_t vlan_attr;
1269 char errmsg[DLADM_STRSIZE];
1270
1271 status = dladm_vlan_info(handle, vlanid, &vlan_attr, DLADM_OPT_PERSIST);
1272 if (status != DLADM_STATUS_OK) {
1273 rcm_log_message(RCM_TRACE1,
1274 "VLAN: vlan_up(): cannot get information for VLAN %u "
1275 "(%s)\n", vlanid, dladm_status2str(status, errmsg));
1276 return (DLADM_WALK_CONTINUE);
1277 }
1278
1279 if (vlan_attr.dv_linkid != vlan_up_argp->linkid)
1280 return (DLADM_WALK_CONTINUE);
1281
1282 rcm_log_message(RCM_TRACE3, "VLAN: vlan_up(%u)\n", vlanid);
1283 if ((status = dladm_vlan_up(handle, vlanid)) == DLADM_STATUS_OK)
1284 return (DLADM_WALK_CONTINUE);
1285
1286 /*
1287 * Prompt the warning message and continue to UP other VLANs.
1288 */
1289 rcm_log_message(RCM_WARNING,
1290 _("VLAN: VLAN up failed (%u): %s\n"),
1291 vlanid, dladm_status2str(status, errmsg));
1292
1293 vlan_up_argp->retval = -1;
1294 return (DLADM_WALK_CONTINUE);
1295 }
1296
1297 /*
1298 * vlan_configure() - Configure VLANs over a physical link after it attaches
1299 */
1300 static int
1301 vlan_configure(rcm_handle_t *hd, datalink_id_t linkid)
1302 {
1303 char rsrc[RCM_LINK_RESOURCE_MAX];
1304 link_cache_t *node;
1305 vlan_up_arg_t arg = {DATALINK_INVALID_LINKID, 0};
1306
1307 /* Check for the VLANs in the cache */
1308 (void) snprintf(rsrc, sizeof (rsrc), "%s/%u", RCM_LINK_PREFIX, linkid);
1309
1310 rcm_log_message(RCM_TRACE2, "VLAN: vlan_configure(%s)\n", rsrc);
1311
1312 /* Check if the link is new or was previously offlined */
1313 (void) mutex_lock(&cache_lock);
1314 if (((node = cache_lookup(hd, rsrc, CACHE_REFRESH)) != NULL) &&
1315 (!(node->vc_state & CACHE_NODE_OFFLINED))) {
1316 rcm_log_message(RCM_TRACE2,
1317 "VLAN: Skipping configured interface(%s)\n", rsrc);
1318 (void) mutex_unlock(&cache_lock);
1319 return (0);
1320 }
1321 (void) mutex_unlock(&cache_lock);
1322
1323 arg.linkid = linkid;
1324 (void) dladm_walk_datalink_id(vlan_up, dld_handle, &arg,
1325 DATALINK_CLASS_VLAN, DATALINK_ANY_MEDIATYPE, DLADM_OPT_PERSIST);
1326
1327 if (arg.retval == 0) {
1328 rcm_log_message(RCM_TRACE2,
1329 "VLAN: vlan_configure succeeded(%s)\n", rsrc);
1330 }
1331 return (arg.retval);
1332 }
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