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8322 nl: misleading-indentation
[unleashed/tickless.git] / usr / src / cmd / rcm_daemon / common / vnic_rcm.c
blob13516d9627e5c737f748610f1fea95d62d8775c5
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 VNIC 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 <libdlvnic.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 /* VNIC link flags */
57 typedef enum {
58 VNIC_OFFLINED = 0x1,
59 VNIC_CONSUMER_OFFLINED = 0x2,
60 VNIC_STALE = 0x4
61 } vnic_flag_t;
62
63 /* link representation */
64 typedef struct dl_vnic {
65 struct dl_vnic *dlv_next; /* next VNIC on the same link */
66 struct dl_vnic *dlv_prev; /* prev VNIC on the same link */
67 datalink_id_t dlv_vnic_id;
68 vnic_flag_t dlv_flags; /* VNIC link flags */
69 } dl_vnic_t;
70
71 /* VNIC 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_vnic_t *vc_vnic; /* VNIC 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 VNICs
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 vnic_register(rcm_handle_t *);
106 static int vnic_unregister(rcm_handle_t *);
107 static int vnic_get_info(rcm_handle_t *, char *, id_t, uint_t,
108 char **, char **, nvlist_t *, rcm_info_t **);
109 static int vnic_suspend(rcm_handle_t *, char *, id_t,
110 timespec_t *, uint_t, char **, rcm_info_t **);
111 static int vnic_resume(rcm_handle_t *, char *, id_t, uint_t,
112 char **, rcm_info_t **);
113 static int vnic_offline(rcm_handle_t *, char *, id_t, uint_t,
114 char **, rcm_info_t **);
115 static int vnic_undo_offline(rcm_handle_t *, char *, id_t, uint_t,
116 char **, rcm_info_t **);
117 static int vnic_remove(rcm_handle_t *, char *, id_t, uint_t,
118 char **, rcm_info_t **);
119 static int vnic_notify_event(rcm_handle_t *, char *, id_t, uint_t,
120 char **, nvlist_t *, rcm_info_t **);
121 static int vnic_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 vnic_consumer_offline(rcm_handle_t *, link_cache_t *,
131 char **, uint_t, rcm_info_t **);
132 static void vnic_consumer_online(rcm_handle_t *, link_cache_t *,
133 char **, uint_t, rcm_info_t **);
134 static int vnic_offline_vnic(link_cache_t *, uint32_t,
135 cache_node_state_t);
136 static void vnic_online_vnic(link_cache_t *);
137 static char *vnic_usage(link_cache_t *);
138 static void vnic_log_err(datalink_id_t, char **, char *);
139 static int vnic_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 vnic_ops =
144 {
145 RCM_MOD_OPS_VERSION,
146 vnic_register,
147 vnic_unregister,
148 vnic_get_info,
149 vnic_suspend,
150 vnic_resume,
151 vnic_offline,
152 vnic_undo_offline,
153 vnic_remove,
154 NULL,
155 NULL,
156 vnic_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 char errmsg[DLADM_STRSIZE];
166 dladm_status_t status;
167
168 rcm_log_message(RCM_TRACE1, "VNIC: 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 "VNIC: 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 (&vnic_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, "VNIC: mod_info\n");
194
195 return ("VNIC module");
196 }
197
198 /*
199 * rcm_mod_fini() - Destroy the network VNIC cache.
200 */
201 int
202 rcm_mod_fini(void)
203 {
204 rcm_log_message(RCM_TRACE1, "VNIC: mod_fini\n");
205
206 /*
207 * Note that vnic_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 * vnic_register() - Make sure the cache is properly sync'ed, and its
221 * registrations are in order.
222 */
223 static int
224 vnic_register(rcm_handle_t *hd)
225 {
226 rcm_log_message(RCM_TRACE1, "VNIC: 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 _("VNIC: failed to register %s\n"),
240 RCM_RESOURCE_LINK_NEW);
241 return (RCM_FAILURE);
242 } else {
243 rcm_log_message(RCM_DEBUG, "VNIC: registered %s\n",
244 RCM_RESOURCE_LINK_NEW);
245 events_registered++;
246 }
247 }
248
249 return (RCM_SUCCESS);
250 }
251
252 /*
253 * vnic_unregister() - Walk the cache, unregistering all the networks.
254 */
255 static int
256 vnic_unregister(rcm_handle_t *hd)
257 {
258 link_cache_t *node;
259
260 rcm_log_message(RCM_TRACE1, "VNIC: 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 _("VNIC: 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 _("VNIC: failed to unregister %s\n"),
288 RCM_RESOURCE_LINK_NEW);
289 return (RCM_FAILURE);
290 } else {
291 rcm_log_message(RCM_DEBUG, "VNIC: unregistered %s\n",
292 RCM_RESOURCE_LINK_NEW);
293 events_registered--;
294 }
295 }
296
297 return (RCM_SUCCESS);
298 }
299
300 /*
301 * vnic_offline() - Offline VNICs on a specific node.
302 */
303 static int
304 vnic_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, "VNIC: 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 vnic_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 VNICs to be offlined
324 */
325 if (vnic_consumer_offline(hd, node, errorp, flags, info) ==
326 RCM_SUCCESS) {
327 rcm_log_message(RCM_DEBUG,
328 "VNIC: consumers agreed on offline\n");
329 } else {
330 vnic_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 "VNIC: offline query succeeded(%s)\n", rsrc);
340 (void) mutex_unlock(&cache_lock);
341 return (RCM_SUCCESS);
342 }
343
344 if (vnic_offline_vnic(node, VNIC_OFFLINED, CACHE_NODE_OFFLINED) !=
345 RCM_SUCCESS) {
346 vnic_online_vnic(node);
347 vnic_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, "VNIC: Offline succeeded(%s)\n", rsrc);
353 (void) mutex_unlock(&cache_lock);
354 return (RCM_SUCCESS);
355 }
356
357 /*
358 * vnic_undo_offline() - Undo offline of a previously offlined node.
359 */
360 /*ARGSUSED*/
361 static int
362 vnic_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, "VNIC: 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 vnic_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 vnic_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 vnic_online_vnic(node);
387
388 /*
389 * Inform IP interfaces on associated VNICs to be onlined
390 */
391 vnic_consumer_online(hd, node, errorp, flags, info);
392
393 node->vc_state &= ~CACHE_NODE_OFFLINED;
394 rcm_log_message(RCM_TRACE1, "VNIC: online succeeded(%s)\n", rsrc);
395 (void) mutex_unlock(&cache_lock);
396 return (RCM_SUCCESS);
397 }
398
399 static void
400 vnic_online_vnic(link_cache_t *node)
401 {
402 dl_vnic_t *vnic;
403 dladm_status_t status;
404 char errmsg[DLADM_STRSIZE];
405
406 /*
407 * Try to bring on all offlined VNICs
408 */
409 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next) {
410 if (!(vnic->dlv_flags & VNIC_OFFLINED))
411 continue;
412
413 if ((status = dladm_vnic_up(dld_handle, vnic->dlv_vnic_id, 0))
414 != DLADM_STATUS_OK) {
415 /*
416 * Print a warning message and continue to online
417 * other VNICs.
418 */
419 rcm_log_message(RCM_WARNING,
420 _("VNIC: VNIC online failed (%u): %s\n"),
421 vnic->dlv_vnic_id,
422 dladm_status2str(status, errmsg));
423 } else {
424 vnic->dlv_flags &= ~VNIC_OFFLINED;
425 }
426 }
427 }
428
429 static int
430 vnic_offline_vnic(link_cache_t *node, uint32_t flags, cache_node_state_t state)
431 {
432 dl_vnic_t *vnic;
433 dladm_status_t status;
434 char errmsg[DLADM_STRSIZE];
435
436 rcm_log_message(RCM_TRACE2, "VNIC: vnic_offline_vnic (%s %u %u)\n",
437 node->vc_resource, flags, state);
438
439 /*
440 * Try to delete all explicit created VNIC
441 */
442 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next) {
443
444 if ((status = dladm_vnic_delete(dld_handle, vnic->dlv_vnic_id,
445 DLADM_OPT_ACTIVE)) != DLADM_STATUS_OK) {
446 rcm_log_message(RCM_WARNING,
447 _("VNIC: VNIC offline failed (%u): %s\n"),
448 vnic->dlv_vnic_id,
449 dladm_status2str(status, errmsg));
450 return (RCM_FAILURE);
451 } else {
452 rcm_log_message(RCM_TRACE1,
453 "VNIC: VNIC offline succeeded(%u)\n",
454 vnic->dlv_vnic_id);
455 vnic->dlv_flags |= flags;
456 }
457 }
458
459 node->vc_state |= state;
460 return (RCM_SUCCESS);
461 }
462
463 /*
464 * vnic_get_info() - Gather usage information for this resource.
465 */
466 /*ARGSUSED*/
467 int
468 vnic_get_info(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
469 char **usagep, char **errorp, nvlist_t *props, rcm_info_t **info)
470 {
471 link_cache_t *node;
472
473 rcm_log_message(RCM_TRACE1, "VNIC: get_info(%s)\n", rsrc);
474
475 (void) mutex_lock(&cache_lock);
476 node = cache_lookup(hd, rsrc, CACHE_REFRESH);
477 if (node == NULL) {
478 rcm_log_message(RCM_INFO,
479 _("VNIC: get_info(%s) unrecognized resource\n"), rsrc);
480 (void) mutex_unlock(&cache_lock);
481 errno = ENOENT;
482 return (RCM_FAILURE);
483 }
484
485 *usagep = vnic_usage(node);
486 (void) mutex_unlock(&cache_lock);
487 if (*usagep == NULL) {
488 /* most likely malloc failure */
489 rcm_log_message(RCM_ERROR,
490 _("VNIC: get_info(%s) malloc failure\n"), rsrc);
491 (void) mutex_unlock(&cache_lock);
492 errno = ENOMEM;
493 return (RCM_FAILURE);
494 }
495
496 /* Set client/role properties */
497 (void) nvlist_add_string(props, RCM_CLIENT_NAME, "VNIC");
498
499 rcm_log_message(RCM_TRACE1, "VNIC: get_info(%s) info = %s\n",
500 rsrc, *usagep);
501 return (RCM_SUCCESS);
502 }
503
504 /*
505 * vnic_suspend() - Nothing to do, always okay
506 */
507 /*ARGSUSED*/
508 static int
509 vnic_suspend(rcm_handle_t *hd, char *rsrc, id_t id, timespec_t *interval,
510 uint_t flags, char **errorp, rcm_info_t **info)
511 {
512 rcm_log_message(RCM_TRACE1, "VNIC: suspend(%s)\n", rsrc);
513 return (RCM_SUCCESS);
514 }
515
516 /*
517 * vnic_resume() - Nothing to do, always okay
518 */
519 /*ARGSUSED*/
520 static int
521 vnic_resume(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
522 char **errorp, rcm_info_t **info)
523 {
524 rcm_log_message(RCM_TRACE1, "VNIC: resume(%s)\n", rsrc);
525 return (RCM_SUCCESS);
526 }
527
528 /*
529 * vnic_consumer_remove()
530 *
531 * Notify VNIC consumers to remove cache.
532 */
533 static int
534 vnic_consumer_remove(rcm_handle_t *hd, link_cache_t *node, uint_t flags,
535 rcm_info_t **info)
536 {
537 dl_vnic_t *vnic = NULL;
538 char rsrc[RCM_LINK_RESOURCE_MAX];
539 int ret = RCM_SUCCESS;
540
541 rcm_log_message(RCM_TRACE2, "VNIC: vnic_consumer_remove (%s)\n",
542 node->vc_resource);
543
544 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next) {
545
546 /*
547 * This will only be called when the offline operation
548 * succeeds, so the VNIC consumers must have been offlined
549 * at this point.
550 */
551 assert(vnic->dlv_flags & VNIC_CONSUMER_OFFLINED);
552
553 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
554 RCM_LINK_PREFIX, vnic->dlv_vnic_id);
555
556 ret = rcm_notify_remove(hd, rsrc, flags, info);
557 if (ret != RCM_SUCCESS) {
558 rcm_log_message(RCM_WARNING,
559 _("VNIC: notify remove failed (%s)\n"), rsrc);
560 break;
561 }
562 }
563
564 rcm_log_message(RCM_TRACE2, "VNIC: vnic_consumer_remove done\n");
565 return (ret);
566 }
567
568 /*
569 * vnic_remove() - remove a resource from cache
570 */
571 /*ARGSUSED*/
572 static int
573 vnic_remove(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
574 char **errorp, rcm_info_t **info)
575 {
576 link_cache_t *node;
577 int rv;
578
579 rcm_log_message(RCM_TRACE1, "VNIC: remove(%s)\n", rsrc);
580
581 (void) mutex_lock(&cache_lock);
582 node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH);
583 if (node == NULL) {
584 rcm_log_message(RCM_INFO,
585 _("VNIC: remove(%s) unrecognized resource\n"), rsrc);
586 (void) mutex_unlock(&cache_lock);
587 errno = ENOENT;
588 return (RCM_FAILURE);
589 }
590
591 /* remove the cached entry for the resource */
592 cache_remove(node);
593 (void) mutex_unlock(&cache_lock);
594
595 rv = vnic_consumer_remove(hd, node, flags, info);
596 node_free(node);
597 return (rv);
598 }
599
600 /*
601 * vnic_notify_event - Project private implementation to receive new resource
602 * events. It intercepts all new resource events. If the
603 * new resource is a network resource, pass up a notify
604 * for it too. The new resource need not be cached, since
605 * it is done at register again.
606 */
607 /*ARGSUSED*/
608 static int
609 vnic_notify_event(rcm_handle_t *hd, char *rsrc, id_t id, uint_t flags,
610 char **errorp, nvlist_t *nvl, rcm_info_t **info)
611 {
612 nvpair_t *nvp = NULL;
613 datalink_id_t linkid;
614 uint64_t id64;
615 int rv = RCM_SUCCESS;
616
617 rcm_log_message(RCM_TRACE1, "VNIC: notify_event(%s)\n", rsrc);
618
619 if (strcmp(rsrc, RCM_RESOURCE_LINK_NEW) != 0) {
620 vnic_log_err(DATALINK_INVALID_LINKID, errorp,
621 "unrecognized event");
622 errno = EINVAL;
623 return (RCM_FAILURE);
624 }
625
626 /* Update cache to reflect latest VNICs */
627 if (cache_update(hd) < 0) {
628 vnic_log_err(DATALINK_INVALID_LINKID, errorp,
629 "private Cache update failed");
630 return (RCM_FAILURE);
631 }
632
633 /*
634 * Try best to recover all configuration.
635 */
636 rcm_log_message(RCM_DEBUG, "VNIC: process_nvlist\n");
637 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
638 if (strcmp(nvpair_name(nvp), RCM_NV_LINKID) != 0)
639 continue;
640
641 if (nvpair_value_uint64(nvp, &id64) != 0) {
642 vnic_log_err(DATALINK_INVALID_LINKID, errorp,
643 "cannot get linkid");
644 rv = RCM_FAILURE;
645 continue;
646 }
647
648 linkid = (datalink_id_t)id64;
649 if (vnic_configure(hd, linkid) != 0) {
650 vnic_log_err(linkid, errorp, "configuring failed");
651 rv = RCM_FAILURE;
652 continue;
653 }
654
655 /* Notify all VNIC consumers */
656 if (vnic_consumer_notify(hd, linkid, errorp, flags,
657 info) != 0) {
658 vnic_log_err(linkid, errorp, "consumer notify failed");
659 rv = RCM_FAILURE;
660 }
661 }
662
663 rcm_log_message(RCM_TRACE1,
664 "VNIC: notify_event: link configuration complete\n");
665 return (rv);
666 }
667
668 /*
669 * vnic_usage - Determine the usage of a link.
670 * The returned buffer is owned by caller, and the caller
671 * must free it up when done.
672 */
673 static char *
674 vnic_usage(link_cache_t *node)
675 {
676 dl_vnic_t *vnic;
677 int nvnic;
678 char *buf;
679 const char *fmt;
680 char *sep;
681 char errmsg[DLADM_STRSIZE];
682 char name[MAXLINKNAMELEN];
683 dladm_status_t status;
684 size_t bufsz;
685
686 rcm_log_message(RCM_TRACE2, "VNIC: usage(%s)\n", node->vc_resource);
687
688 assert(MUTEX_HELD(&cache_lock));
689 if ((status = dladm_datalink_id2info(dld_handle, node->vc_linkid, NULL,
690 NULL, NULL, name, sizeof (name))) != DLADM_STATUS_OK) {
691 rcm_log_message(RCM_ERROR,
692 _("VNIC: usage(%s) get link name failure(%s)\n"),
693 node->vc_resource, dladm_status2str(status, errmsg));
694 return (NULL);
695 }
696
697 if (node->vc_state & CACHE_NODE_OFFLINED)
698 fmt = _("%1$s offlined");
699 else
700 fmt = _("%1$s VNICs: ");
701
702 /* TRANSLATION_NOTE: separator used between VNIC linkids */
703 sep = _(", ");
704
705 nvnic = 0;
706 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next)
707 nvnic++;
708
709 /* space for VNICs and separators, plus message */
710 bufsz = nvnic * (MAXLINKNAMELEN + strlen(sep)) +
711 strlen(fmt) + MAXLINKNAMELEN + 1;
712 if ((buf = malloc(bufsz)) == NULL) {
713 rcm_log_message(RCM_ERROR,
714 _("VNIC: usage(%s) malloc failure(%s)\n"),
715 node->vc_resource, strerror(errno));
716 return (NULL);
717 }
718 (void) snprintf(buf, bufsz, fmt, name);
719
720 if (node->vc_state & CACHE_NODE_OFFLINED) {
721 /* Nothing else to do */
722 rcm_log_message(RCM_TRACE2, "VNIC: usage (%s) info = %s\n",
723 node->vc_resource, buf);
724 return (buf);
725 }
726
727 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next) {
728 rcm_log_message(RCM_DEBUG, "VNIC:= %u\n", vnic->dlv_vnic_id);
729
730 if ((status = dladm_datalink_id2info(dld_handle,
731 vnic->dlv_vnic_id, NULL, NULL, NULL, name, sizeof (name)))
732 != DLADM_STATUS_OK) {
733 rcm_log_message(RCM_ERROR,
734 _("VNIC: usage(%s) get vnic %u name failure(%s)\n"),
735 node->vc_resource, vnic->dlv_vnic_id,
736 dladm_status2str(status, errmsg));
737 free(buf);
738 return (NULL);
739 }
740
741 (void) strlcat(buf, name, bufsz);
742 if (vnic->dlv_next != NULL)
743 (void) strlcat(buf, sep, bufsz);
744 }
745
746 rcm_log_message(RCM_TRACE2, "VNIC: usage (%s) info = %s\n",
747 node->vc_resource, buf);
748
749 return (buf);
750 }
751
752 /*
753 * Cache management routines, all cache management functions should be
754 * be called with cache_lock held.
755 */
756
757 /*
758 * cache_lookup() - Get a cache node for a resource.
759 * Call with cache lock held.
760 *
761 * This ensures that the cache is consistent with the system state and
762 * returns a pointer to the cache element corresponding to the resource.
763 */
764 static link_cache_t *
765 cache_lookup(rcm_handle_t *hd, char *rsrc, char options)
766 {
767 link_cache_t *node;
768
769 rcm_log_message(RCM_TRACE2, "VNIC: cache lookup(%s)\n", rsrc);
770
771 assert(MUTEX_HELD(&cache_lock));
772 if (options & CACHE_REFRESH) {
773 /* drop lock since update locks cache again */
774 (void) mutex_unlock(&cache_lock);
775 (void) cache_update(hd);
776 (void) mutex_lock(&cache_lock);
777 }
778
779 node = cache_head.vc_next;
780 for (; node != &cache_tail; node = node->vc_next) {
781 if (strcmp(rsrc, node->vc_resource) == 0) {
782 rcm_log_message(RCM_TRACE2,
783 "VNIC: cache lookup succeeded(%s)\n", rsrc);
784 return (node);
785 }
786 }
787 return (NULL);
788 }
789
790 /*
791 * node_free - Free a node from the cache
792 */
793 static void
794 node_free(link_cache_t *node)
795 {
796 dl_vnic_t *vnic, *next;
797
798 if (node != NULL) {
799 free(node->vc_resource);
800
801 /* free the VNIC list */
802 for (vnic = node->vc_vnic; vnic != NULL; vnic = next) {
803 next = vnic->dlv_next;
804 free(vnic);
805 }
806 free(node);
807 }
808 }
809
810 /*
811 * cache_insert - Insert a resource node in cache
812 */
813 static void
814 cache_insert(link_cache_t *node)
815 {
816 assert(MUTEX_HELD(&cache_lock));
817
818 /* insert at the head for best performance */
819 node->vc_next = cache_head.vc_next;
820 node->vc_prev = &cache_head;
821
822 node->vc_next->vc_prev = node;
823 node->vc_prev->vc_next = node;
824 }
825
826 /*
827 * cache_remove() - Remove a resource node from cache.
828 */
829 static void
830 cache_remove(link_cache_t *node)
831 {
832 assert(MUTEX_HELD(&cache_lock));
833 node->vc_next->vc_prev = node->vc_prev;
834 node->vc_prev->vc_next = node->vc_next;
835 node->vc_next = NULL;
836 node->vc_prev = NULL;
837 }
838
839 typedef struct vnic_update_arg_s {
840 rcm_handle_t *hd;
841 int retval;
842 } vnic_update_arg_t;
843
844 /*
845 * vnic_update() - Update physical interface properties
846 */
847 static int
848 vnic_update(dladm_handle_t handle, datalink_id_t vnicid, void *arg)
849 {
850 vnic_update_arg_t *vnic_update_argp = arg;
851 rcm_handle_t *hd = vnic_update_argp->hd;
852 link_cache_t *node;
853 dl_vnic_t *vnic;
854 char *rsrc;
855 dladm_vnic_attr_t vnic_attr;
856 dladm_status_t status;
857 char errmsg[DLADM_STRSIZE];
858 boolean_t newnode = B_FALSE;
859 int ret = -1;
860
861 rcm_log_message(RCM_TRACE2, "VNIC: vnic_update(%u)\n", vnicid);
862
863 assert(MUTEX_HELD(&cache_lock));
864 status = dladm_vnic_info(handle, vnicid, &vnic_attr, DLADM_OPT_ACTIVE);
865 if (status != DLADM_STATUS_OK) {
866 rcm_log_message(RCM_TRACE1,
867 "VNIC: vnic_update() cannot get vnic information for "
868 "%u(%s)\n", vnicid, dladm_status2str(status, errmsg));
869 return (DLADM_WALK_CONTINUE);
870 }
871
872 if (vnic_attr.va_link_id == DATALINK_INVALID_LINKID) {
873 /*
874 * Skip the etherstubs.
875 */
876 rcm_log_message(RCM_TRACE1,
877 "VNIC: vnic_update(): skip the etherstub %u\n", vnicid);
878 return (DLADM_WALK_CONTINUE);
879 }
880
881 rsrc = malloc(RCM_LINK_RESOURCE_MAX);
882 if (rsrc == NULL) {
883 rcm_log_message(RCM_ERROR, _("VNIC: malloc error(%s): %u\n"),
884 strerror(errno), vnicid);
885 goto done;
886 }
887
888 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
889 RCM_LINK_PREFIX, vnic_attr.va_link_id);
890
891 node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH);
892 if (node != NULL) {
893 rcm_log_message(RCM_DEBUG,
894 "VNIC: %s already registered (vnicid:%d)\n",
895 rsrc, vnic_attr.va_vnic_id);
896 free(rsrc);
897 } else {
898 rcm_log_message(RCM_DEBUG,
899 "VNIC: %s is a new resource (vnicid:%d)\n",
900 rsrc, vnic_attr.va_vnic_id);
901 if ((node = calloc(1, sizeof (link_cache_t))) == NULL) {
902 free(rsrc);
903 rcm_log_message(RCM_ERROR, _("VNIC: calloc: %s\n"),
904 strerror(errno));
905 goto done;
906 }
907
908 node->vc_resource = rsrc;
909 node->vc_vnic = NULL;
910 node->vc_linkid = vnic_attr.va_link_id;
911 node->vc_state |= CACHE_NODE_NEW;
912 newnode = B_TRUE;
913 }
914
915 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next) {
916 if (vnic->dlv_vnic_id == vnicid) {
917 vnic->dlv_flags &= ~VNIC_STALE;
918 break;
919 }
920 }
921
922 if (vnic == NULL) {
923 if ((vnic = calloc(1, sizeof (dl_vnic_t))) == NULL) {
924 rcm_log_message(RCM_ERROR, _("VNIC: malloc: %s\n"),
925 strerror(errno));
926 if (newnode) {
927 free(rsrc);
928 free(node);
929 }
930 goto done;
931 }
932 vnic->dlv_vnic_id = vnicid;
933 vnic->dlv_next = node->vc_vnic;
934 vnic->dlv_prev = NULL;
935 if (node->vc_vnic != NULL)
936 node->vc_vnic->dlv_prev = vnic;
937 node->vc_vnic = vnic;
938 }
939
940 node->vc_state &= ~CACHE_NODE_STALE;
941
942 if (newnode)
943 cache_insert(node);
944
945 rcm_log_message(RCM_TRACE3, "VNIC: vnic_update: succeeded(%u)\n",
946 vnicid);
947 ret = 0;
948 done:
949 vnic_update_argp->retval = ret;
950 return (ret == 0 ? DLADM_WALK_CONTINUE : DLADM_WALK_TERMINATE);
951 }
952
953 /*
954 * vnic_update_all() - Determine all VNIC links in the system
955 */
956 static int
957 vnic_update_all(rcm_handle_t *hd)
958 {
959 vnic_update_arg_t arg = {NULL, 0};
960
961 rcm_log_message(RCM_TRACE2, "VNIC: vnic_update_all\n");
962
963 assert(MUTEX_HELD(&cache_lock));
964 arg.hd = hd;
965 (void) dladm_walk_datalink_id(vnic_update, dld_handle, &arg,
966 DATALINK_CLASS_VNIC, DATALINK_ANY_MEDIATYPE, DLADM_OPT_ACTIVE);
967 return (arg.retval);
968 }
969
970 /*
971 * cache_update() - Update cache with latest interface info
972 */
973 static int
974 cache_update(rcm_handle_t *hd)
975 {
976 link_cache_t *node, *nnode;
977 dl_vnic_t *vnic;
978 int rv;
979
980 rcm_log_message(RCM_TRACE2, "VNIC: cache_update\n");
981
982 (void) mutex_lock(&cache_lock);
983
984 /* first we walk the entire cache, marking each entry stale */
985 node = cache_head.vc_next;
986 for (; node != &cache_tail; node = node->vc_next) {
987 node->vc_state |= CACHE_NODE_STALE;
988 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next)
989 vnic->dlv_flags |= VNIC_STALE;
990 }
991
992 rv = vnic_update_all(hd);
993
994 /*
995 * Continue to delete all stale nodes from the cache even
996 * vnic_update_all() failed. Unregister link that are not offlined
997 * and still in cache
998 */
999 for (node = cache_head.vc_next; node != &cache_tail; node = nnode) {
1000 dl_vnic_t *vnic, *next;
1001
1002 for (vnic = node->vc_vnic; vnic != NULL; vnic = next) {
1003 next = vnic->dlv_next;
1004
1005 /* clear stale VNICs */
1006 if (vnic->dlv_flags & VNIC_STALE) {
1007 if (vnic->dlv_prev != NULL)
1008 vnic->dlv_prev->dlv_next = next;
1009 else
1010 node->vc_vnic = next;
1011
1012 if (next != NULL)
1013 next->dlv_prev = vnic->dlv_prev;
1014 free(vnic);
1015 }
1016 }
1017
1018 nnode = node->vc_next;
1019 if (node->vc_state & CACHE_NODE_STALE) {
1020 (void) rcm_unregister_interest(hd, node->vc_resource,
1021 0);
1022 rcm_log_message(RCM_DEBUG, "VNIC: unregistered %s\n",
1023 node->vc_resource);
1024 assert(node->vc_vnic == NULL);
1025 cache_remove(node);
1026 node_free(node);
1027 continue;
1028 }
1029
1030 if (!(node->vc_state & CACHE_NODE_NEW))
1031 continue;
1032
1033 if (rcm_register_interest(hd, node->vc_resource, 0, NULL) !=
1034 RCM_SUCCESS) {
1035 rcm_log_message(RCM_ERROR,
1036 _("VNIC: failed to register %s\n"),
1037 node->vc_resource);
1038 rv = -1;
1039 } else {
1040 rcm_log_message(RCM_DEBUG, "VNIC: registered %s\n",
1041 node->vc_resource);
1042 node->vc_state &= ~CACHE_NODE_NEW;
1043 }
1044 }
1045
1046 (void) mutex_unlock(&cache_lock);
1047 return (rv);
1048 }
1049
1050 /*
1051 * cache_free() - Empty the cache
1052 */
1053 static void
1054 cache_free()
1055 {
1056 link_cache_t *node;
1057
1058 rcm_log_message(RCM_TRACE2, "VNIC: cache_free\n");
1059
1060 (void) mutex_lock(&cache_lock);
1061 node = cache_head.vc_next;
1062 while (node != &cache_tail) {
1063 cache_remove(node);
1064 node_free(node);
1065 node = cache_head.vc_next;
1066 }
1067 (void) mutex_unlock(&cache_lock);
1068 }
1069
1070 /*
1071 * vnic_log_err() - RCM error log wrapper
1072 */
1073 static void
1074 vnic_log_err(datalink_id_t linkid, char **errorp, char *errmsg)
1075 {
1076 char link[MAXLINKNAMELEN];
1077 char errstr[DLADM_STRSIZE];
1078 dladm_status_t status;
1079 int len;
1080 const char *errfmt;
1081 char *error;
1082
1083 link[0] = '\0';
1084 if (linkid != DATALINK_INVALID_LINKID) {
1085 char rsrc[RCM_LINK_RESOURCE_MAX];
1086
1087 (void) snprintf(rsrc, sizeof (rsrc), "%s/%u",
1088 RCM_LINK_PREFIX, linkid);
1089
1090 rcm_log_message(RCM_ERROR, _("VNIC: %s(%s)\n"), errmsg, rsrc);
1091 if ((status = dladm_datalink_id2info(dld_handle, linkid, NULL,
1092 NULL, NULL, link, sizeof (link))) != DLADM_STATUS_OK) {
1093 rcm_log_message(RCM_WARNING,
1094 _("VNIC: cannot get link name for (%s) %s\n"),
1095 rsrc, dladm_status2str(status, errstr));
1096 }
1097 } else {
1098 rcm_log_message(RCM_ERROR, _("VNIC: %s\n"), errmsg);
1099 }
1100
1101 errfmt = strlen(link) > 0 ? _("VNIC: %s(%s)") : _("VNIC: %s");
1102 len = strlen(errfmt) + strlen(errmsg) + MAXLINKNAMELEN + 1;
1103 if ((error = malloc(len)) != NULL) {
1104 if (strlen(link) > 0)
1105 (void) snprintf(error, len, errfmt, errmsg, link);
1106 else
1107 (void) snprintf(error, len, errfmt, errmsg);
1108 }
1109
1110 if (errorp != NULL)
1111 *errorp = error;
1112 }
1113
1114 /*
1115 * vnic_consumer_online()
1116 *
1117 * Notify online to VNIC consumers.
1118 */
1119 /* ARGSUSED */
1120 static void
1121 vnic_consumer_online(rcm_handle_t *hd, link_cache_t *node, char **errorp,
1122 uint_t flags, rcm_info_t **info)
1123 {
1124 dl_vnic_t *vnic;
1125 char rsrc[RCM_LINK_RESOURCE_MAX];
1126
1127 rcm_log_message(RCM_TRACE2, "VNIC: vnic_consumer_online (%s)\n",
1128 node->vc_resource);
1129
1130 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next) {
1131 if (!(vnic->dlv_flags & VNIC_CONSUMER_OFFLINED))
1132 continue;
1133
1134 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
1135 RCM_LINK_PREFIX, vnic->dlv_vnic_id);
1136
1137 if (rcm_notify_online(hd, rsrc, flags, info) == RCM_SUCCESS)
1138 vnic->dlv_flags &= ~VNIC_CONSUMER_OFFLINED;
1139 }
1140
1141 rcm_log_message(RCM_TRACE2, "VNIC: vnic_consumer_online done\n");
1142 }
1143
1144 /*
1145 * vnic_consumer_offline()
1146 *
1147 * Offline VNIC consumers.
1148 */
1149 static int
1150 vnic_consumer_offline(rcm_handle_t *hd, link_cache_t *node, char **errorp,
1151 uint_t flags, rcm_info_t **info)
1152 {
1153 dl_vnic_t *vnic;
1154 char rsrc[RCM_LINK_RESOURCE_MAX];
1155 int ret = RCM_SUCCESS;
1156
1157 rcm_log_message(RCM_TRACE2, "VNIC: vnic_consumer_offline (%s)\n",
1158 node->vc_resource);
1159
1160 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next) {
1161 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u",
1162 RCM_LINK_PREFIX, vnic->dlv_vnic_id);
1163
1164 ret = rcm_request_offline(hd, rsrc, flags, info);
1165 if (ret != RCM_SUCCESS)
1166 break;
1167
1168 vnic->dlv_flags |= VNIC_CONSUMER_OFFLINED;
1169 }
1170
1171 if (vnic != NULL)
1172 vnic_consumer_online(hd, node, errorp, flags, info);
1173
1174 rcm_log_message(RCM_TRACE2, "VNIC: vnic_consumer_offline done\n");
1175 return (ret);
1176 }
1177
1178 /*
1179 * Send RCM_RESOURCE_LINK_NEW events to other modules about new VNICs.
1180 * Return 0 on success, -1 on failure.
1181 */
1182 static int
1183 vnic_notify_new_vnic(rcm_handle_t *hd, char *rsrc)
1184 {
1185 link_cache_t *node;
1186 dl_vnic_t *vnic;
1187 nvlist_t *nvl = NULL;
1188 uint64_t id;
1189 int ret = -1;
1190
1191 rcm_log_message(RCM_TRACE2, "VNIC: vnic_notify_new_vnic (%s)\n", rsrc);
1192
1193 (void) mutex_lock(&cache_lock);
1194 if ((node = cache_lookup(hd, rsrc, CACHE_REFRESH)) == NULL) {
1195 (void) mutex_unlock(&cache_lock);
1196 return (0);
1197 }
1198
1199 if (nvlist_alloc(&nvl, 0, 0) != 0) {
1200 (void) mutex_unlock(&cache_lock);
1201 rcm_log_message(RCM_WARNING,
1202 _("VNIC: failed to allocate nvlist\n"));
1203 goto done;
1204 }
1205
1206 for (vnic = node->vc_vnic; vnic != NULL; vnic = vnic->dlv_next) {
1207 rcm_log_message(RCM_TRACE2,
1208 "VNIC: vnic_notify_new_vnic add (%u)\n", vnic->dlv_vnic_id);
1209
1210 id = vnic->dlv_vnic_id;
1211 if (nvlist_add_uint64(nvl, RCM_NV_LINKID, id) != 0) {
1212 rcm_log_message(RCM_ERROR,
1213 _("VNIC: failed to construct nvlist\n"));
1214 (void) mutex_unlock(&cache_lock);
1215 goto done;
1216 }
1217 }
1218 (void) mutex_unlock(&cache_lock);
1219
1220 if (rcm_notify_event(hd, RCM_RESOURCE_LINK_NEW, 0, nvl, NULL) !=
1221 RCM_SUCCESS) {
1222 rcm_log_message(RCM_ERROR,
1223 _("VNIC: failed to notify %s event for %s\n"),
1224 RCM_RESOURCE_LINK_NEW, node->vc_resource);
1225 goto done;
1226 }
1227
1228 ret = 0;
1229 done:
1230 nvlist_free(nvl);
1231 return (ret);
1232 }
1233
1234 /*
1235 * vnic_consumer_notify() - Notify consumers of VNICs coming back online.
1236 */
1237 static int
1238 vnic_consumer_notify(rcm_handle_t *hd, datalink_id_t linkid, char **errorp,
1239 uint_t flags, rcm_info_t **info)
1240 {
1241 char rsrc[RCM_LINK_RESOURCE_MAX];
1242 link_cache_t *node;
1243
1244 /* Check for the interface in the cache */
1245 (void) snprintf(rsrc, RCM_LINK_RESOURCE_MAX, "%s/%u", RCM_LINK_PREFIX,
1246 linkid);
1247
1248 rcm_log_message(RCM_TRACE2, "VNIC: vnic_consumer_notify(%s)\n", rsrc);
1249
1250 /*
1251 * Inform IP consumers of the new link.
1252 */
1253 if (vnic_notify_new_vnic(hd, rsrc) != 0) {
1254 (void) mutex_lock(&cache_lock);
1255 if ((node = cache_lookup(hd, rsrc, CACHE_NO_REFRESH)) != NULL) {
1256 (void) vnic_offline_vnic(node, VNIC_STALE,
1257 CACHE_NODE_STALE);
1258 }
1259 (void) mutex_unlock(&cache_lock);
1260 rcm_log_message(RCM_TRACE2,
1261 "VNIC: vnic_notify_new_vnic failed(%s)\n", rsrc);
1262 return (-1);
1263 }
1264
1265 rcm_log_message(RCM_TRACE2, "VNIC: vnic_consumer_notify succeeded\n");
1266 return (0);
1267 }
1268
1269 typedef struct vnic_up_arg_s {
1270 datalink_id_t linkid;
1271 int retval;
1272 } vnic_up_arg_t;
1273
1274 static int
1275 vnic_up(dladm_handle_t handle, datalink_id_t vnicid, void *arg)
1276 {
1277 vnic_up_arg_t *vnic_up_argp = arg;
1278 dladm_status_t status;
1279 dladm_vnic_attr_t vnic_attr;
1280 char errmsg[DLADM_STRSIZE];
1281
1282 status = dladm_vnic_info(handle, vnicid, &vnic_attr, DLADM_OPT_PERSIST);
1283 if (status != DLADM_STATUS_OK) {
1284 rcm_log_message(RCM_TRACE1,
1285 "VNIC: vnic_up(): cannot get information for VNIC %u "
1286 "(%s)\n", vnicid, dladm_status2str(status, errmsg));
1287 return (DLADM_WALK_CONTINUE);
1288 }
1289
1290 if (vnic_attr.va_link_id != vnic_up_argp->linkid)
1291 return (DLADM_WALK_CONTINUE);
1292
1293 rcm_log_message(RCM_TRACE3, "VNIC: vnic_up(%u)\n", vnicid);
1294 if ((status = dladm_vnic_up(handle, vnicid, 0)) == DLADM_STATUS_OK)
1295 return (DLADM_WALK_CONTINUE);
1296
1297 /*
1298 * Prompt the warning message and continue to UP other VNICs.
1299 */
1300 rcm_log_message(RCM_WARNING,
1301 _("VNIC: VNIC up failed (%u): %s\n"),
1302 vnicid, dladm_status2str(status, errmsg));
1303
1304 vnic_up_argp->retval = -1;
1305 return (DLADM_WALK_CONTINUE);
1306 }
1307
1308 /*
1309 * vnic_configure() - Configure VNICs over a physical link after it attaches
1310 */
1311 static int
1312 vnic_configure(rcm_handle_t *hd, datalink_id_t linkid)
1313 {
1314 char rsrc[RCM_LINK_RESOURCE_MAX];
1315 link_cache_t *node;
1316 vnic_up_arg_t arg = {DATALINK_INVALID_LINKID, 0};
1317
1318 /* Check for the VNICs in the cache */
1319 (void) snprintf(rsrc, sizeof (rsrc), "%s/%u", RCM_LINK_PREFIX, linkid);
1320
1321 rcm_log_message(RCM_TRACE2, "VNIC: vnic_configure(%s)\n", rsrc);
1322
1323 /* Check if the link is new or was previously offlined */
1324 (void) mutex_lock(&cache_lock);
1325 if (((node = cache_lookup(hd, rsrc, CACHE_REFRESH)) != NULL) &&
1326 (!(node->vc_state & CACHE_NODE_OFFLINED))) {
1327 rcm_log_message(RCM_TRACE2,
1328 "VNIC: Skipping configured interface(%s)\n", rsrc);
1329 (void) mutex_unlock(&cache_lock);
1330 return (0);
1331 }
1332 (void) mutex_unlock(&cache_lock);
1333
1334 arg.linkid = linkid;
1335 (void) dladm_walk_datalink_id(vnic_up, dld_handle, &arg,
1336 DATALINK_CLASS_VNIC, DATALINK_ANY_MEDIATYPE, DLADM_OPT_PERSIST);
1337
1338 if (arg.retval == 0) {
1339 rcm_log_message(RCM_TRACE2,
1340 "VNIC: vnic_configure succeeded(%s)\n", rsrc);
1341 }
1342 return (arg.retval);
1343 }
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