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 * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
24 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2013 Joyent, Inc. All rights reserved.
26 */
27
28#include <sys/zfs_context.h>
29#include <sys/spa_impl.h>
30#include <sys/refcount.h>
31#include <sys/vdev_disk.h>
32#include <sys/vdev_impl.h>
33#include <sys/fs/zfs.h>
34#include <sys/zio.h>
35#include <sys/sunldi.h>
36#include <sys/efi_partition.h>
37#include <sys/fm/fs/zfs.h>
38
39/*
40 * Virtual device vector for disks.
41 */
42
43extern ldi_ident_t zfs_li;
44
45static void vdev_disk_close(vdev_t *);
46
47typedef struct vdev_disk_ldi_cb {
48 list_node_t lcb_next;
49 ldi_callback_id_t lcb_id;
50} vdev_disk_ldi_cb_t;
51
52static void
53vdev_disk_alloc(vdev_t *vd)
54{
55 vdev_disk_t *dvd;
56
57 dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);
58 /*
59 * Create the LDI event callback list.
60 */
61 list_create(&dvd->vd_ldi_cbs, sizeof (vdev_disk_ldi_cb_t),
62 offsetof(vdev_disk_ldi_cb_t, lcb_next));
63}
64
65static void
66vdev_disk_free(vdev_t *vd)
67{
68 vdev_disk_t *dvd = vd->vdev_tsd;
69 vdev_disk_ldi_cb_t *lcb;
70
71 if (dvd == NULL)
72 return;
73
74 /*
75 * We have already closed the LDI handle. Clean up the LDI event
76 * callbacks and free vd->vdev_tsd.
77 */
78 while ((lcb = list_head(&dvd->vd_ldi_cbs)) != NULL) {
79 list_remove(&dvd->vd_ldi_cbs, lcb);
80 (void) ldi_ev_remove_callbacks(lcb->lcb_id);
81 kmem_free(lcb, sizeof (vdev_disk_ldi_cb_t));
82 }
83 list_destroy(&dvd->vd_ldi_cbs);
84 kmem_free(dvd, sizeof (vdev_disk_t));
85 vd->vdev_tsd = NULL;
86}
87
88/* ARGSUSED */
89static int
90vdev_disk_off_notify(ldi_handle_t lh, ldi_ev_cookie_t ecookie, void *arg,
91 void *ev_data)
92{
93 vdev_t *vd = (vdev_t *)arg;
94 vdev_disk_t *dvd = vd->vdev_tsd;
95
96 /*
97 * Ignore events other than offline.
98 */
99 if (strcmp(ldi_ev_get_type(ecookie), LDI_EV_OFFLINE) != 0)
100 return (LDI_EV_SUCCESS);
101
102 /*
103 * All LDI handles must be closed for the state change to succeed, so
104 * call on vdev_disk_close() to do this.
105 *
106 * We inform vdev_disk_close that it is being called from offline
107 * notify context so it will defer cleanup of LDI event callbacks and
108 * freeing of vd->vdev_tsd to the offline finalize or a reopen.
109 */
110 dvd->vd_ldi_offline = B_TRUE;
111 vdev_disk_close(vd);
112
113 /*
114 * Now that the device is closed, request that the spa_async_thread
115 * mark the device as REMOVED and notify FMA of the removal.
116 */
117 zfs_post_remove(vd->vdev_spa, vd);
118 vd->vdev_remove_wanted = B_TRUE;
119 spa_async_request(vd->vdev_spa, SPA_ASYNC_REMOVE);
120
121 return (LDI_EV_SUCCESS);
122}
123
124/* ARGSUSED */
125static void
126vdev_disk_off_finalize(ldi_handle_t lh, ldi_ev_cookie_t ecookie,
127 int ldi_result, void *arg, void *ev_data)
128{
129 vdev_t *vd = (vdev_t *)arg;
130
131 /*
132 * Ignore events other than offline.
133 */
134 if (strcmp(ldi_ev_get_type(ecookie), LDI_EV_OFFLINE) != 0)
135 return;
136
137 /*
138 * We have already closed the LDI handle in notify.
139 * Clean up the LDI event callbacks and free vd->vdev_tsd.
140 */
141 vdev_disk_free(vd);
142
143 /*
144 * Request that the vdev be reopened if the offline state change was
145 * unsuccessful.
146 */
147 if (ldi_result != LDI_EV_SUCCESS) {
148 vd->vdev_probe_wanted = B_TRUE;
149 spa_async_request(vd->vdev_spa, SPA_ASYNC_PROBE);
150 }
151}
152
153static ldi_ev_callback_t vdev_disk_off_callb = {
154 .cb_vers = LDI_EV_CB_VERS,
155 .cb_notify = vdev_disk_off_notify,
156 .cb_finalize = vdev_disk_off_finalize
157};
158
159/* ARGSUSED */
160static void
161vdev_disk_dgrd_finalize(ldi_handle_t lh, ldi_ev_cookie_t ecookie,
162 int ldi_result, void *arg, void *ev_data)
163{
164 vdev_t *vd = (vdev_t *)arg;
165
166 /*
167 * Ignore events other than degrade.
168 */
169 if (strcmp(ldi_ev_get_type(ecookie), LDI_EV_DEGRADE) != 0)
170 return;
171
172 /*
173 * Degrade events always succeed. Mark the vdev as degraded.
174 * This status is purely informative for the user.
175 */
176 (void) vdev_degrade(vd->vdev_spa, vd->vdev_guid, 0);
177}
178
179static ldi_ev_callback_t vdev_disk_dgrd_callb = {
180 .cb_vers = LDI_EV_CB_VERS,
181 .cb_notify = NULL,
182 .cb_finalize = vdev_disk_dgrd_finalize
183};
184
185static void
186vdev_disk_hold(vdev_t *vd)
187{
188 ddi_devid_t devid;
189 char *minor;
190
191 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
192
193 /*
194 * We must have a pathname, and it must be absolute.
195 */
196 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/')
197 return;
198
199 /*
200 * Only prefetch path and devid info if the device has
201 * never been opened.
202 */
203 if (vd->vdev_tsd != NULL)
204 return;
205
206 if (vd->vdev_wholedisk == -1ULL) {
207 size_t len = strlen(vd->vdev_path) + 3;
208 char *buf = kmem_alloc(len, KM_SLEEP);
209
210 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
211
212 (void) ldi_vp_from_name(buf, &vd->vdev_name_vp);
213 kmem_free(buf, len);
214 }
215
216 if (vd->vdev_name_vp == NULL)
217 (void) ldi_vp_from_name(vd->vdev_path, &vd->vdev_name_vp);
218
219 if (vd->vdev_devid != NULL &&
220 ddi_devid_str_decode(vd->vdev_devid, &devid, &minor) == 0) {
221 (void) ldi_vp_from_devid(devid, minor, &vd->vdev_devid_vp);
222 ddi_devid_str_free(minor);
223 ddi_devid_free(devid);
224 }
225}
226
227static void
228vdev_disk_rele(vdev_t *vd)
229{
230 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
231
232 if (vd->vdev_name_vp) {
233 VN_RELE_ASYNC(vd->vdev_name_vp,
234 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
235 vd->vdev_name_vp = NULL;
236 }
237 if (vd->vdev_devid_vp) {
238 VN_RELE_ASYNC(vd->vdev_devid_vp,
239 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
240 vd->vdev_devid_vp = NULL;
241 }
242}
243
244static uint64_t
245vdev_disk_get_space(vdev_t *vd, uint64_t capacity, uint_t blksz)
246{
247 ASSERT(vd->vdev_wholedisk);
248
249 vdev_disk_t *dvd = vd->vdev_tsd;
250 dk_efi_t dk_ioc;
251 efi_gpt_t *efi;
252 uint64_t avail_space = 0;
253 int efisize = EFI_LABEL_SIZE * 2;
254
255 dk_ioc.dki_data = kmem_alloc(efisize, KM_SLEEP);
256 dk_ioc.dki_lba = 1;
257 dk_ioc.dki_length = efisize;
258 dk_ioc.dki_data_64 = (uint64_t)(uintptr_t)dk_ioc.dki_data;
259 efi = dk_ioc.dki_data;
260
261 if (ldi_ioctl(dvd->vd_lh, DKIOCGETEFI, (intptr_t)&dk_ioc,
262 FKIOCTL, kcred, NULL) == 0) {
263 uint64_t efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA);
264
265 if (capacity > efi_altern_lba)
266 avail_space = (capacity - efi_altern_lba) * blksz;
267 }
268 kmem_free(dk_ioc.dki_data, efisize);
269 return (avail_space);
270}
271
272/*
273 * We want to be loud in DEBUG kernels when DKIOCGMEDIAINFOEXT fails, or when
274 * even a fallback to DKIOCGMEDIAINFO fails.
275 */
276#ifdef DEBUG
277#define VDEV_DEBUG(...) cmn_err(CE_NOTE, __VA_ARGS__)
278#else
279#define VDEV_DEBUG(...) /* Nothing... */
280#endif
281
282static int
283vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize,
284 uint64_t *ashift)
285{
286 spa_t *spa = vd->vdev_spa;
287 vdev_disk_t *dvd = vd->vdev_tsd;
288 ldi_ev_cookie_t ecookie;
289 vdev_disk_ldi_cb_t *lcb;
290 union {
291 struct dk_minfo_ext ude;
292 struct dk_minfo ud;
293 } dks;
294 struct dk_minfo_ext *dkmext = &dks.ude;
295 struct dk_minfo *dkm = &dks.ud;
296 int error;
297 dev_t dev;
298 int otyp;
299 boolean_t validate_devid = B_FALSE;
300 ddi_devid_t devid;
301 uint64_t capacity = 0, blksz = 0, pbsize;
302
303 /*
304 * We must have a pathname, and it must be absolute.
305 */
306 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
307 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
308 return (SET_ERROR(EINVAL));
309 }
310
311 /*
312 * Reopen the device if it's not currently open. Otherwise,
313 * just update the physical size of the device.
314 */
315 if (dvd != NULL) {
316 if (dvd->vd_ldi_offline && dvd->vd_lh == NULL) {
317 /*
318 * If we are opening a device in its offline notify
319 * context, the LDI handle was just closed. Clean
320 * up the LDI event callbacks and free vd->vdev_tsd.
321 */
322 vdev_disk_free(vd);
323 } else {
324 ASSERT(vd->vdev_reopening);
325 goto skip_open;
326 }
327 }
328
329 /*
330 * Create vd->vdev_tsd.
331 */
332 vdev_disk_alloc(vd);
333 dvd = vd->vdev_tsd;
334
335 /*
336 * When opening a disk device, we want to preserve the user's original
337 * intent. We always want to open the device by the path the user gave
338 * us, even if it is one of multiple paths to the save device. But we
339 * also want to be able to survive disks being removed/recabled.
340 * Therefore the sequence of opening devices is:
341 *
342 * 1. Try opening the device by path. For legacy pools without the
343 * 'whole_disk' property, attempt to fix the path by appending 's0'.
344 *
345 * 2. If the devid of the device matches the stored value, return
346 * success.
347 *
348 * 3. Otherwise, the device may have moved. Try opening the device
349 * by the devid instead.
350 */
351 if (vd->vdev_devid != NULL) {
352 if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
353 &dvd->vd_minor) != 0) {
354 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
355 return (SET_ERROR(EINVAL));
356 }
357 }
358
359 error = EINVAL; /* presume failure */
360
361 if (vd->vdev_path != NULL) {
362
363 if (vd->vdev_wholedisk == -1ULL) {
364 size_t len = strlen(vd->vdev_path) + 3;
365 char *buf = kmem_alloc(len, KM_SLEEP);
366
367 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
368
369 error = ldi_open_by_name(buf, spa_mode(spa), kcred,
370 &dvd->vd_lh, zfs_li);
371 if (error == 0) {
372 spa_strfree(vd->vdev_path);
373 vd->vdev_path = buf;
374 vd->vdev_wholedisk = 1ULL;
375 } else {
376 kmem_free(buf, len);
377 }
378 }
379
380 /*
381 * If we have not yet opened the device, try to open it by the
382 * specified path.
383 */
384 if (error != 0) {
385 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
386 kcred, &dvd->vd_lh, zfs_li);
387 }
388
389 /*
390 * Compare the devid to the stored value.
391 */
392 if (error == 0 && vd->vdev_devid != NULL &&
393 ldi_get_devid(dvd->vd_lh, &devid) == 0) {
394 if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
395 error = SET_ERROR(EINVAL);
396 (void) ldi_close(dvd->vd_lh, spa_mode(spa),
397 kcred);
398 dvd->vd_lh = NULL;
399 }
400 ddi_devid_free(devid);
401 }
402
403 /*
404 * If we succeeded in opening the device, but 'vdev_wholedisk'
405 * is not yet set, then this must be a slice.
406 */
407 if (error == 0 && vd->vdev_wholedisk == -1ULL)
408 vd->vdev_wholedisk = 0;
409 }
410
411 /*
412 * If we were unable to open by path, or the devid check fails, open by
413 * devid instead.
414 */
415 if (error != 0 && vd->vdev_devid != NULL) {
416 error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
417 spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
418 }
419
420 /*
421 * If all else fails, then try opening by physical path (if available)
422 * or the logical path (if we failed due to the devid check). While not
423 * as reliable as the devid, this will give us something, and the higher
424 * level vdev validation will prevent us from opening the wrong device.
425 */
426 if (error) {
427 if (vd->vdev_devid != NULL)
428 validate_devid = B_TRUE;
429
430 if (vd->vdev_physpath != NULL &&
431 (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
432 error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
433 kcred, &dvd->vd_lh, zfs_li);
434
435 /*
436 * Note that we don't support the legacy auto-wholedisk support
437 * as above. This hasn't been used in a very long time and we
438 * don't need to propagate its oddities to this edge condition.
439 */
440 if (error && vd->vdev_path != NULL)
441 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
442 kcred, &dvd->vd_lh, zfs_li);
443 }
444
445 if (error) {
446 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
447 return (error);
448 }
449
450 /*
451 * Now that the device has been successfully opened, update the devid
452 * if necessary.
453 */
454 if (validate_devid && spa_writeable(spa) &&
455 ldi_get_devid(dvd->vd_lh, &devid) == 0) {
456 if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
457 char *vd_devid;
458
459 vd_devid = ddi_devid_str_encode(devid, dvd->vd_minor);
460 zfs_dbgmsg("vdev %s: update devid from %s, "
461 "to %s", vd->vdev_path, vd->vdev_devid, vd_devid);
462 spa_strfree(vd->vdev_devid);
463 vd->vdev_devid = spa_strdup(vd_devid);
464 ddi_devid_str_free(vd_devid);
465 }
466 ddi_devid_free(devid);
467 }
468
469 /*
470 * Once a device is opened, verify that the physical device path (if
471 * available) is up to date.
472 */
473 if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
474 ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
475 char *physpath, *minorname;
476
477 physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
478 minorname = NULL;
479 if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
480 ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
481 (vd->vdev_physpath == NULL ||
482 strcmp(vd->vdev_physpath, physpath) != 0)) {
483 if (vd->vdev_physpath)
484 spa_strfree(vd->vdev_physpath);
485 (void) strlcat(physpath, ":", MAXPATHLEN);
486 (void) strlcat(physpath, minorname, MAXPATHLEN);
487 vd->vdev_physpath = spa_strdup(physpath);
488 }
489 if (minorname)
490 kmem_free(minorname, strlen(minorname) + 1);
491 kmem_free(physpath, MAXPATHLEN);
492 }
493
494 /*
495 * Register callbacks for the LDI offline event.
496 */
497 if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_OFFLINE, &ecookie) ==
498 LDI_EV_SUCCESS) {
499 lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
500 list_insert_tail(&dvd->vd_ldi_cbs, lcb);
501 (void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
502 &vdev_disk_off_callb, (void *) vd, &lcb->lcb_id);
503 }
504
505 /*
506 * Register callbacks for the LDI degrade event.
507 */
508 if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_DEGRADE, &ecookie) ==
509 LDI_EV_SUCCESS) {
510 lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
511 list_insert_tail(&dvd->vd_ldi_cbs, lcb);
512 (void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
513 &vdev_disk_dgrd_callb, (void *) vd, &lcb->lcb_id);
514 }
515skip_open:
516 /*
517 * Determine the actual size of the device.
518 */
519 if (ldi_get_size(dvd->vd_lh, psize) != 0) {
520 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
521 return (SET_ERROR(EINVAL));
522 }
523
524 *max_psize = *psize;
525
526 /*
527 * Determine the device's minimum transfer size.
528 * If the ioctl isn't supported, assume DEV_BSIZE.
529 */
530 if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT,
531 (intptr_t)dkmext, FKIOCTL, kcred, NULL)) == 0) {
532 capacity = dkmext->dki_capacity - 1;
533 blksz = dkmext->dki_lbsize;
534 pbsize = dkmext->dki_pbsize;
535 } else if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFO,
536 (intptr_t)dkm, FKIOCTL, kcred, NULL)) == 0) {
537 VDEV_DEBUG(
538 "vdev_disk_open(\"%s\"): fallback to DKIOCGMEDIAINFO\n",
539 vd->vdev_path);
540 capacity = dkm->dki_capacity - 1;
541 blksz = dkm->dki_lbsize;
542 pbsize = blksz;
543 } else {
544 VDEV_DEBUG("vdev_disk_open(\"%s\"): "
545 "both DKIOCGMEDIAINFO{,EXT} calls failed, %d\n",
546 vd->vdev_path, error);
547 pbsize = DEV_BSIZE;
548 }
549
550 *ashift = highbit64(MAX(pbsize, SPA_MINBLOCKSIZE)) - 1;
551
552 if (vd->vdev_wholedisk == 1) {
553 int wce = 1;
554
555 if (error == 0) {
556 /*
557 * If we have the capability to expand, we'd have
558 * found out via success from DKIOCGMEDIAINFO{,EXT}.
559 * Adjust max_psize upward accordingly since we know
560 * we own the whole disk now.
561 */
562 *max_psize += vdev_disk_get_space(vd, capacity, blksz);
563 zfs_dbgmsg("capacity change: vdev %s, psize %llu, "
564 "max_psize %llu", vd->vdev_path, *psize,
565 *max_psize);
566 }
567
568 /*
569 * Since we own the whole disk, try to enable disk write
570 * caching. We ignore errors because it's OK if we can't do it.
571 */
572 (void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
573 FKIOCTL, kcred, NULL);
574 }
575
576 /*
577 * Clear the nowritecache bit, so that on a vdev_reopen() we will
578 * try again.
579 */
580 vd->vdev_nowritecache = B_FALSE;
581
582 return (0);
583}
584
585static void
586vdev_disk_close(vdev_t *vd)
587{
588 vdev_disk_t *dvd = vd->vdev_tsd;
589
590 if (vd->vdev_reopening || dvd == NULL)
591 return;
592
593 if (dvd->vd_minor != NULL) {
594 ddi_devid_str_free(dvd->vd_minor);
595 dvd->vd_minor = NULL;
596 }
597
598 if (dvd->vd_devid != NULL) {
599 ddi_devid_free(dvd->vd_devid);
600 dvd->vd_devid = NULL;
601 }
602
603 if (dvd->vd_lh != NULL) {
604 (void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
605 dvd->vd_lh = NULL;
606 }
607
608 vd->vdev_delayed_close = B_FALSE;
609 /*
610 * If we closed the LDI handle due to an offline notify from LDI,
611 * don't free vd->vdev_tsd or unregister the callbacks here;
612 * the offline finalize callback or a reopen will take care of it.
613 */
614 if (dvd->vd_ldi_offline)
615 return;
616
617 vdev_disk_free(vd);
618}
619
620int
621vdev_disk_physio(vdev_t *vd, caddr_t data,
622 size_t size, uint64_t offset, int flags, boolean_t isdump)
623{
624 vdev_disk_t *dvd = vd->vdev_tsd;
625
626 /*
627 * If the vdev is closed, it's likely in the REMOVED or FAULTED state.
628 * Nothing to be done here but return failure.
629 */
630 if (dvd == NULL || (dvd->vd_ldi_offline && dvd->vd_lh == NULL))
631 return (EIO);
632
633 ASSERT(vd->vdev_ops == &vdev_disk_ops);
634
635 /*
636 * If in the context of an active crash dump, use the ldi_dump(9F)
637 * call instead of ldi_strategy(9F) as usual.
638 */
639 if (isdump) {
640 ASSERT3P(dvd, !=, NULL);
641 return (ldi_dump(dvd->vd_lh, data, lbtodb(offset),
642 lbtodb(size)));
643 }
644
645 return (vdev_disk_ldi_physio(dvd->vd_lh, data, size, offset, flags));
646}
647
648int
649vdev_disk_ldi_physio(ldi_handle_t vd_lh, caddr_t data,
650 size_t size, uint64_t offset, int flags)
651{
652 buf_t *bp;
653 int error = 0;
654
655 if (vd_lh == NULL)
656 return (SET_ERROR(EINVAL));
657
658 ASSERT(flags & B_READ || flags & B_WRITE);
659
660 bp = getrbuf(KM_SLEEP);
661 bp->b_flags = flags | B_BUSY | B_NOCACHE | B_FAILFAST;
662 bp->b_bcount = size;
663 bp->b_un.b_addr = (void *)data;
664 bp->b_lblkno = lbtodb(offset);
665 bp->b_bufsize = size;
666
667 error = ldi_strategy(vd_lh, bp);
668 ASSERT(error == 0);
669 if ((error = biowait(bp)) == 0 && bp->b_resid != 0)
670 error = SET_ERROR(EIO);
671 freerbuf(bp);
672
673 return (error);
674}
675
676static void
677vdev_disk_io_intr(buf_t *bp)
678{
679 vdev_buf_t *vb = (vdev_buf_t *)bp;
680 zio_t *zio = vb->vb_io;
681
682 /*
683 * The rest of the zio stack only deals with EIO, ECKSUM, and ENXIO.
684 * Rather than teach the rest of the stack about other error
685 * possibilities (EFAULT, etc), we normalize the error value here.
686 */
687 zio->io_error = (geterror(bp) != 0 ? SET_ERROR(EIO) : 0);
688
689 if (zio->io_error == 0 && bp->b_resid != 0)
690 zio->io_error = SET_ERROR(EIO);
691
692 kmem_free(vb, sizeof (vdev_buf_t));
693
694 zio_interrupt(zio);
695}
696
697static void
698vdev_disk_ioctl_free(zio_t *zio)
699{
700 kmem_free(zio->io_vsd, sizeof (struct dk_callback));
701}
702
703static const zio_vsd_ops_t vdev_disk_vsd_ops = {
704 vdev_disk_ioctl_free,
705 zio_vsd_default_cksum_report
706};
707
708static void
709vdev_disk_ioctl_done(void *zio_arg, int error)
710{
711 zio_t *zio = zio_arg;
712
713 zio->io_error = error;
714
715 zio_interrupt(zio);
716}
717
| 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 * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
24 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2013 Joyent, Inc. All rights reserved.
26 */
27
28#include <sys/zfs_context.h>
29#include <sys/spa_impl.h>
30#include <sys/refcount.h>
31#include <sys/vdev_disk.h>
32#include <sys/vdev_impl.h>
33#include <sys/fs/zfs.h>
34#include <sys/zio.h>
35#include <sys/sunldi.h>
36#include <sys/efi_partition.h>
37#include <sys/fm/fs/zfs.h>
38
39/*
40 * Virtual device vector for disks.
41 */
42
43extern ldi_ident_t zfs_li;
44
45static void vdev_disk_close(vdev_t *);
46
47typedef struct vdev_disk_ldi_cb {
48 list_node_t lcb_next;
49 ldi_callback_id_t lcb_id;
50} vdev_disk_ldi_cb_t;
51
52static void
53vdev_disk_alloc(vdev_t *vd)
54{
55 vdev_disk_t *dvd;
56
57 dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);
58 /*
59 * Create the LDI event callback list.
60 */
61 list_create(&dvd->vd_ldi_cbs, sizeof (vdev_disk_ldi_cb_t),
62 offsetof(vdev_disk_ldi_cb_t, lcb_next));
63}
64
65static void
66vdev_disk_free(vdev_t *vd)
67{
68 vdev_disk_t *dvd = vd->vdev_tsd;
69 vdev_disk_ldi_cb_t *lcb;
70
71 if (dvd == NULL)
72 return;
73
74 /*
75 * We have already closed the LDI handle. Clean up the LDI event
76 * callbacks and free vd->vdev_tsd.
77 */
78 while ((lcb = list_head(&dvd->vd_ldi_cbs)) != NULL) {
79 list_remove(&dvd->vd_ldi_cbs, lcb);
80 (void) ldi_ev_remove_callbacks(lcb->lcb_id);
81 kmem_free(lcb, sizeof (vdev_disk_ldi_cb_t));
82 }
83 list_destroy(&dvd->vd_ldi_cbs);
84 kmem_free(dvd, sizeof (vdev_disk_t));
85 vd->vdev_tsd = NULL;
86}
87
88/* ARGSUSED */
89static int
90vdev_disk_off_notify(ldi_handle_t lh, ldi_ev_cookie_t ecookie, void *arg,
91 void *ev_data)
92{
93 vdev_t *vd = (vdev_t *)arg;
94 vdev_disk_t *dvd = vd->vdev_tsd;
95
96 /*
97 * Ignore events other than offline.
98 */
99 if (strcmp(ldi_ev_get_type(ecookie), LDI_EV_OFFLINE) != 0)
100 return (LDI_EV_SUCCESS);
101
102 /*
103 * All LDI handles must be closed for the state change to succeed, so
104 * call on vdev_disk_close() to do this.
105 *
106 * We inform vdev_disk_close that it is being called from offline
107 * notify context so it will defer cleanup of LDI event callbacks and
108 * freeing of vd->vdev_tsd to the offline finalize or a reopen.
109 */
110 dvd->vd_ldi_offline = B_TRUE;
111 vdev_disk_close(vd);
112
113 /*
114 * Now that the device is closed, request that the spa_async_thread
115 * mark the device as REMOVED and notify FMA of the removal.
116 */
117 zfs_post_remove(vd->vdev_spa, vd);
118 vd->vdev_remove_wanted = B_TRUE;
119 spa_async_request(vd->vdev_spa, SPA_ASYNC_REMOVE);
120
121 return (LDI_EV_SUCCESS);
122}
123
124/* ARGSUSED */
125static void
126vdev_disk_off_finalize(ldi_handle_t lh, ldi_ev_cookie_t ecookie,
127 int ldi_result, void *arg, void *ev_data)
128{
129 vdev_t *vd = (vdev_t *)arg;
130
131 /*
132 * Ignore events other than offline.
133 */
134 if (strcmp(ldi_ev_get_type(ecookie), LDI_EV_OFFLINE) != 0)
135 return;
136
137 /*
138 * We have already closed the LDI handle in notify.
139 * Clean up the LDI event callbacks and free vd->vdev_tsd.
140 */
141 vdev_disk_free(vd);
142
143 /*
144 * Request that the vdev be reopened if the offline state change was
145 * unsuccessful.
146 */
147 if (ldi_result != LDI_EV_SUCCESS) {
148 vd->vdev_probe_wanted = B_TRUE;
149 spa_async_request(vd->vdev_spa, SPA_ASYNC_PROBE);
150 }
151}
152
153static ldi_ev_callback_t vdev_disk_off_callb = {
154 .cb_vers = LDI_EV_CB_VERS,
155 .cb_notify = vdev_disk_off_notify,
156 .cb_finalize = vdev_disk_off_finalize
157};
158
159/* ARGSUSED */
160static void
161vdev_disk_dgrd_finalize(ldi_handle_t lh, ldi_ev_cookie_t ecookie,
162 int ldi_result, void *arg, void *ev_data)
163{
164 vdev_t *vd = (vdev_t *)arg;
165
166 /*
167 * Ignore events other than degrade.
168 */
169 if (strcmp(ldi_ev_get_type(ecookie), LDI_EV_DEGRADE) != 0)
170 return;
171
172 /*
173 * Degrade events always succeed. Mark the vdev as degraded.
174 * This status is purely informative for the user.
175 */
176 (void) vdev_degrade(vd->vdev_spa, vd->vdev_guid, 0);
177}
178
179static ldi_ev_callback_t vdev_disk_dgrd_callb = {
180 .cb_vers = LDI_EV_CB_VERS,
181 .cb_notify = NULL,
182 .cb_finalize = vdev_disk_dgrd_finalize
183};
184
185static void
186vdev_disk_hold(vdev_t *vd)
187{
188 ddi_devid_t devid;
189 char *minor;
190
191 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
192
193 /*
194 * We must have a pathname, and it must be absolute.
195 */
196 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/')
197 return;
198
199 /*
200 * Only prefetch path and devid info if the device has
201 * never been opened.
202 */
203 if (vd->vdev_tsd != NULL)
204 return;
205
206 if (vd->vdev_wholedisk == -1ULL) {
207 size_t len = strlen(vd->vdev_path) + 3;
208 char *buf = kmem_alloc(len, KM_SLEEP);
209
210 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
211
212 (void) ldi_vp_from_name(buf, &vd->vdev_name_vp);
213 kmem_free(buf, len);
214 }
215
216 if (vd->vdev_name_vp == NULL)
217 (void) ldi_vp_from_name(vd->vdev_path, &vd->vdev_name_vp);
218
219 if (vd->vdev_devid != NULL &&
220 ddi_devid_str_decode(vd->vdev_devid, &devid, &minor) == 0) {
221 (void) ldi_vp_from_devid(devid, minor, &vd->vdev_devid_vp);
222 ddi_devid_str_free(minor);
223 ddi_devid_free(devid);
224 }
225}
226
227static void
228vdev_disk_rele(vdev_t *vd)
229{
230 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
231
232 if (vd->vdev_name_vp) {
233 VN_RELE_ASYNC(vd->vdev_name_vp,
234 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
235 vd->vdev_name_vp = NULL;
236 }
237 if (vd->vdev_devid_vp) {
238 VN_RELE_ASYNC(vd->vdev_devid_vp,
239 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
240 vd->vdev_devid_vp = NULL;
241 }
242}
243
244static uint64_t
245vdev_disk_get_space(vdev_t *vd, uint64_t capacity, uint_t blksz)
246{
247 ASSERT(vd->vdev_wholedisk);
248
249 vdev_disk_t *dvd = vd->vdev_tsd;
250 dk_efi_t dk_ioc;
251 efi_gpt_t *efi;
252 uint64_t avail_space = 0;
253 int efisize = EFI_LABEL_SIZE * 2;
254
255 dk_ioc.dki_data = kmem_alloc(efisize, KM_SLEEP);
256 dk_ioc.dki_lba = 1;
257 dk_ioc.dki_length = efisize;
258 dk_ioc.dki_data_64 = (uint64_t)(uintptr_t)dk_ioc.dki_data;
259 efi = dk_ioc.dki_data;
260
261 if (ldi_ioctl(dvd->vd_lh, DKIOCGETEFI, (intptr_t)&dk_ioc,
262 FKIOCTL, kcred, NULL) == 0) {
263 uint64_t efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA);
264
265 if (capacity > efi_altern_lba)
266 avail_space = (capacity - efi_altern_lba) * blksz;
267 }
268 kmem_free(dk_ioc.dki_data, efisize);
269 return (avail_space);
270}
271
272/*
273 * We want to be loud in DEBUG kernels when DKIOCGMEDIAINFOEXT fails, or when
274 * even a fallback to DKIOCGMEDIAINFO fails.
275 */
276#ifdef DEBUG
277#define VDEV_DEBUG(...) cmn_err(CE_NOTE, __VA_ARGS__)
278#else
279#define VDEV_DEBUG(...) /* Nothing... */
280#endif
281
282static int
283vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize,
284 uint64_t *ashift)
285{
286 spa_t *spa = vd->vdev_spa;
287 vdev_disk_t *dvd = vd->vdev_tsd;
288 ldi_ev_cookie_t ecookie;
289 vdev_disk_ldi_cb_t *lcb;
290 union {
291 struct dk_minfo_ext ude;
292 struct dk_minfo ud;
293 } dks;
294 struct dk_minfo_ext *dkmext = &dks.ude;
295 struct dk_minfo *dkm = &dks.ud;
296 int error;
297 dev_t dev;
298 int otyp;
299 boolean_t validate_devid = B_FALSE;
300 ddi_devid_t devid;
301 uint64_t capacity = 0, blksz = 0, pbsize;
302
303 /*
304 * We must have a pathname, and it must be absolute.
305 */
306 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
307 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
308 return (SET_ERROR(EINVAL));
309 }
310
311 /*
312 * Reopen the device if it's not currently open. Otherwise,
313 * just update the physical size of the device.
314 */
315 if (dvd != NULL) {
316 if (dvd->vd_ldi_offline && dvd->vd_lh == NULL) {
317 /*
318 * If we are opening a device in its offline notify
319 * context, the LDI handle was just closed. Clean
320 * up the LDI event callbacks and free vd->vdev_tsd.
321 */
322 vdev_disk_free(vd);
323 } else {
324 ASSERT(vd->vdev_reopening);
325 goto skip_open;
326 }
327 }
328
329 /*
330 * Create vd->vdev_tsd.
331 */
332 vdev_disk_alloc(vd);
333 dvd = vd->vdev_tsd;
334
335 /*
336 * When opening a disk device, we want to preserve the user's original
337 * intent. We always want to open the device by the path the user gave
338 * us, even if it is one of multiple paths to the save device. But we
339 * also want to be able to survive disks being removed/recabled.
340 * Therefore the sequence of opening devices is:
341 *
342 * 1. Try opening the device by path. For legacy pools without the
343 * 'whole_disk' property, attempt to fix the path by appending 's0'.
344 *
345 * 2. If the devid of the device matches the stored value, return
346 * success.
347 *
348 * 3. Otherwise, the device may have moved. Try opening the device
349 * by the devid instead.
350 */
351 if (vd->vdev_devid != NULL) {
352 if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
353 &dvd->vd_minor) != 0) {
354 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
355 return (SET_ERROR(EINVAL));
356 }
357 }
358
359 error = EINVAL; /* presume failure */
360
361 if (vd->vdev_path != NULL) {
362
363 if (vd->vdev_wholedisk == -1ULL) {
364 size_t len = strlen(vd->vdev_path) + 3;
365 char *buf = kmem_alloc(len, KM_SLEEP);
366
367 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
368
369 error = ldi_open_by_name(buf, spa_mode(spa), kcred,
370 &dvd->vd_lh, zfs_li);
371 if (error == 0) {
372 spa_strfree(vd->vdev_path);
373 vd->vdev_path = buf;
374 vd->vdev_wholedisk = 1ULL;
375 } else {
376 kmem_free(buf, len);
377 }
378 }
379
380 /*
381 * If we have not yet opened the device, try to open it by the
382 * specified path.
383 */
384 if (error != 0) {
385 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
386 kcred, &dvd->vd_lh, zfs_li);
387 }
388
389 /*
390 * Compare the devid to the stored value.
391 */
392 if (error == 0 && vd->vdev_devid != NULL &&
393 ldi_get_devid(dvd->vd_lh, &devid) == 0) {
394 if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
395 error = SET_ERROR(EINVAL);
396 (void) ldi_close(dvd->vd_lh, spa_mode(spa),
397 kcred);
398 dvd->vd_lh = NULL;
399 }
400 ddi_devid_free(devid);
401 }
402
403 /*
404 * If we succeeded in opening the device, but 'vdev_wholedisk'
405 * is not yet set, then this must be a slice.
406 */
407 if (error == 0 && vd->vdev_wholedisk == -1ULL)
408 vd->vdev_wholedisk = 0;
409 }
410
411 /*
412 * If we were unable to open by path, or the devid check fails, open by
413 * devid instead.
414 */
415 if (error != 0 && vd->vdev_devid != NULL) {
416 error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
417 spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
418 }
419
420 /*
421 * If all else fails, then try opening by physical path (if available)
422 * or the logical path (if we failed due to the devid check). While not
423 * as reliable as the devid, this will give us something, and the higher
424 * level vdev validation will prevent us from opening the wrong device.
425 */
426 if (error) {
427 if (vd->vdev_devid != NULL)
428 validate_devid = B_TRUE;
429
430 if (vd->vdev_physpath != NULL &&
431 (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
432 error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
433 kcred, &dvd->vd_lh, zfs_li);
434
435 /*
436 * Note that we don't support the legacy auto-wholedisk support
437 * as above. This hasn't been used in a very long time and we
438 * don't need to propagate its oddities to this edge condition.
439 */
440 if (error && vd->vdev_path != NULL)
441 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
442 kcred, &dvd->vd_lh, zfs_li);
443 }
444
445 if (error) {
446 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
447 return (error);
448 }
449
450 /*
451 * Now that the device has been successfully opened, update the devid
452 * if necessary.
453 */
454 if (validate_devid && spa_writeable(spa) &&
455 ldi_get_devid(dvd->vd_lh, &devid) == 0) {
456 if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
457 char *vd_devid;
458
459 vd_devid = ddi_devid_str_encode(devid, dvd->vd_minor);
460 zfs_dbgmsg("vdev %s: update devid from %s, "
461 "to %s", vd->vdev_path, vd->vdev_devid, vd_devid);
462 spa_strfree(vd->vdev_devid);
463 vd->vdev_devid = spa_strdup(vd_devid);
464 ddi_devid_str_free(vd_devid);
465 }
466 ddi_devid_free(devid);
467 }
468
469 /*
470 * Once a device is opened, verify that the physical device path (if
471 * available) is up to date.
472 */
473 if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
474 ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
475 char *physpath, *minorname;
476
477 physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
478 minorname = NULL;
479 if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
480 ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
481 (vd->vdev_physpath == NULL ||
482 strcmp(vd->vdev_physpath, physpath) != 0)) {
483 if (vd->vdev_physpath)
484 spa_strfree(vd->vdev_physpath);
485 (void) strlcat(physpath, ":", MAXPATHLEN);
486 (void) strlcat(physpath, minorname, MAXPATHLEN);
487 vd->vdev_physpath = spa_strdup(physpath);
488 }
489 if (minorname)
490 kmem_free(minorname, strlen(minorname) + 1);
491 kmem_free(physpath, MAXPATHLEN);
492 }
493
494 /*
495 * Register callbacks for the LDI offline event.
496 */
497 if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_OFFLINE, &ecookie) ==
498 LDI_EV_SUCCESS) {
499 lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
500 list_insert_tail(&dvd->vd_ldi_cbs, lcb);
501 (void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
502 &vdev_disk_off_callb, (void *) vd, &lcb->lcb_id);
503 }
504
505 /*
506 * Register callbacks for the LDI degrade event.
507 */
508 if (ldi_ev_get_cookie(dvd->vd_lh, LDI_EV_DEGRADE, &ecookie) ==
509 LDI_EV_SUCCESS) {
510 lcb = kmem_zalloc(sizeof (vdev_disk_ldi_cb_t), KM_SLEEP);
511 list_insert_tail(&dvd->vd_ldi_cbs, lcb);
512 (void) ldi_ev_register_callbacks(dvd->vd_lh, ecookie,
513 &vdev_disk_dgrd_callb, (void *) vd, &lcb->lcb_id);
514 }
515skip_open:
516 /*
517 * Determine the actual size of the device.
518 */
519 if (ldi_get_size(dvd->vd_lh, psize) != 0) {
520 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
521 return (SET_ERROR(EINVAL));
522 }
523
524 *max_psize = *psize;
525
526 /*
527 * Determine the device's minimum transfer size.
528 * If the ioctl isn't supported, assume DEV_BSIZE.
529 */
530 if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT,
531 (intptr_t)dkmext, FKIOCTL, kcred, NULL)) == 0) {
532 capacity = dkmext->dki_capacity - 1;
533 blksz = dkmext->dki_lbsize;
534 pbsize = dkmext->dki_pbsize;
535 } else if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFO,
536 (intptr_t)dkm, FKIOCTL, kcred, NULL)) == 0) {
537 VDEV_DEBUG(
538 "vdev_disk_open(\"%s\"): fallback to DKIOCGMEDIAINFO\n",
539 vd->vdev_path);
540 capacity = dkm->dki_capacity - 1;
541 blksz = dkm->dki_lbsize;
542 pbsize = blksz;
543 } else {
544 VDEV_DEBUG("vdev_disk_open(\"%s\"): "
545 "both DKIOCGMEDIAINFO{,EXT} calls failed, %d\n",
546 vd->vdev_path, error);
547 pbsize = DEV_BSIZE;
548 }
549
550 *ashift = highbit64(MAX(pbsize, SPA_MINBLOCKSIZE)) - 1;
551
552 if (vd->vdev_wholedisk == 1) {
553 int wce = 1;
554
555 if (error == 0) {
556 /*
557 * If we have the capability to expand, we'd have
558 * found out via success from DKIOCGMEDIAINFO{,EXT}.
559 * Adjust max_psize upward accordingly since we know
560 * we own the whole disk now.
561 */
562 *max_psize += vdev_disk_get_space(vd, capacity, blksz);
563 zfs_dbgmsg("capacity change: vdev %s, psize %llu, "
564 "max_psize %llu", vd->vdev_path, *psize,
565 *max_psize);
566 }
567
568 /*
569 * Since we own the whole disk, try to enable disk write
570 * caching. We ignore errors because it's OK if we can't do it.
571 */
572 (void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
573 FKIOCTL, kcred, NULL);
574 }
575
576 /*
577 * Clear the nowritecache bit, so that on a vdev_reopen() we will
578 * try again.
579 */
580 vd->vdev_nowritecache = B_FALSE;
581
582 return (0);
583}
584
585static void
586vdev_disk_close(vdev_t *vd)
587{
588 vdev_disk_t *dvd = vd->vdev_tsd;
589
590 if (vd->vdev_reopening || dvd == NULL)
591 return;
592
593 if (dvd->vd_minor != NULL) {
594 ddi_devid_str_free(dvd->vd_minor);
595 dvd->vd_minor = NULL;
596 }
597
598 if (dvd->vd_devid != NULL) {
599 ddi_devid_free(dvd->vd_devid);
600 dvd->vd_devid = NULL;
601 }
602
603 if (dvd->vd_lh != NULL) {
604 (void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
605 dvd->vd_lh = NULL;
606 }
607
608 vd->vdev_delayed_close = B_FALSE;
609 /*
610 * If we closed the LDI handle due to an offline notify from LDI,
611 * don't free vd->vdev_tsd or unregister the callbacks here;
612 * the offline finalize callback or a reopen will take care of it.
613 */
614 if (dvd->vd_ldi_offline)
615 return;
616
617 vdev_disk_free(vd);
618}
619
620int
621vdev_disk_physio(vdev_t *vd, caddr_t data,
622 size_t size, uint64_t offset, int flags, boolean_t isdump)
623{
624 vdev_disk_t *dvd = vd->vdev_tsd;
625
626 /*
627 * If the vdev is closed, it's likely in the REMOVED or FAULTED state.
628 * Nothing to be done here but return failure.
629 */
630 if (dvd == NULL || (dvd->vd_ldi_offline && dvd->vd_lh == NULL))
631 return (EIO);
632
633 ASSERT(vd->vdev_ops == &vdev_disk_ops);
634
635 /*
636 * If in the context of an active crash dump, use the ldi_dump(9F)
637 * call instead of ldi_strategy(9F) as usual.
638 */
639 if (isdump) {
640 ASSERT3P(dvd, !=, NULL);
641 return (ldi_dump(dvd->vd_lh, data, lbtodb(offset),
642 lbtodb(size)));
643 }
644
645 return (vdev_disk_ldi_physio(dvd->vd_lh, data, size, offset, flags));
646}
647
648int
649vdev_disk_ldi_physio(ldi_handle_t vd_lh, caddr_t data,
650 size_t size, uint64_t offset, int flags)
651{
652 buf_t *bp;
653 int error = 0;
654
655 if (vd_lh == NULL)
656 return (SET_ERROR(EINVAL));
657
658 ASSERT(flags & B_READ || flags & B_WRITE);
659
660 bp = getrbuf(KM_SLEEP);
661 bp->b_flags = flags | B_BUSY | B_NOCACHE | B_FAILFAST;
662 bp->b_bcount = size;
663 bp->b_un.b_addr = (void *)data;
664 bp->b_lblkno = lbtodb(offset);
665 bp->b_bufsize = size;
666
667 error = ldi_strategy(vd_lh, bp);
668 ASSERT(error == 0);
669 if ((error = biowait(bp)) == 0 && bp->b_resid != 0)
670 error = SET_ERROR(EIO);
671 freerbuf(bp);
672
673 return (error);
674}
675
676static void
677vdev_disk_io_intr(buf_t *bp)
678{
679 vdev_buf_t *vb = (vdev_buf_t *)bp;
680 zio_t *zio = vb->vb_io;
681
682 /*
683 * The rest of the zio stack only deals with EIO, ECKSUM, and ENXIO.
684 * Rather than teach the rest of the stack about other error
685 * possibilities (EFAULT, etc), we normalize the error value here.
686 */
687 zio->io_error = (geterror(bp) != 0 ? SET_ERROR(EIO) : 0);
688
689 if (zio->io_error == 0 && bp->b_resid != 0)
690 zio->io_error = SET_ERROR(EIO);
691
692 kmem_free(vb, sizeof (vdev_buf_t));
693
694 zio_interrupt(zio);
695}
696
697static void
698vdev_disk_ioctl_free(zio_t *zio)
699{
700 kmem_free(zio->io_vsd, sizeof (struct dk_callback));
701}
702
703static const zio_vsd_ops_t vdev_disk_vsd_ops = {
704 vdev_disk_ioctl_free,
705 zio_vsd_default_cksum_report
706};
707
708static void
709vdev_disk_ioctl_done(void *zio_arg, int error)
710{
711 zio_t *zio = zio_arg;
712
713 zio->io_error = error;
714
715 zio_interrupt(zio);
716}
717
|
819}
820
821static void
822vdev_disk_io_done(zio_t *zio)
823{
824 vdev_t *vd = zio->io_vd;
825
826 /*
827 * If the device returned EIO, then attempt a DKIOCSTATE ioctl to see if
828 * the device has been removed. If this is the case, then we trigger an
829 * asynchronous removal of the device. Otherwise, probe the device and
830 * make sure it's still accessible.
831 */
832 if (zio->io_error == EIO && !vd->vdev_remove_wanted) {
833 vdev_disk_t *dvd = vd->vdev_tsd;
834 int state = DKIO_NONE;
835
836 if (ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state,
837 FKIOCTL, kcred, NULL) == 0 && state != DKIO_INSERTED) {
838 /*
839 * We post the resource as soon as possible, instead of
840 * when the async removal actually happens, because the
841 * DE is using this information to discard previous I/O
842 * errors.
843 */
844 zfs_post_remove(zio->io_spa, vd);
845 vd->vdev_remove_wanted = B_TRUE;
846 spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE);
847 } else if (!vd->vdev_delayed_close) {
848 vd->vdev_delayed_close = B_TRUE;
849 }
850 }
851}
852
853vdev_ops_t vdev_disk_ops = {
854 vdev_disk_open,
855 vdev_disk_close,
856 vdev_default_asize,
857 vdev_disk_io_start,
858 vdev_disk_io_done,
859 NULL,
860 vdev_disk_hold,
861 vdev_disk_rele,
862 VDEV_TYPE_DISK, /* name of this vdev type */
863 B_TRUE /* leaf vdev */
864};
865
866/*
867 * Given the root disk device devid or pathname, read the label from
868 * the device, and construct a configuration nvlist.
869 */
870int
871vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config)
872{
873 ldi_handle_t vd_lh;
874 vdev_label_t *label;
875 uint64_t s, size;
876 int l;
877 ddi_devid_t tmpdevid;
878 int error = -1;
879 char *minor_name;
880
881 /*
882 * Read the device label and build the nvlist.
883 */
884 if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid,
885 &minor_name) == 0) {
886 error = ldi_open_by_devid(tmpdevid, minor_name,
887 FREAD, kcred, &vd_lh, zfs_li);
888 ddi_devid_free(tmpdevid);
889 ddi_devid_str_free(minor_name);
890 }
891
892 if (error && (error = ldi_open_by_name(devpath, FREAD, kcred, &vd_lh,
893 zfs_li)))
894 return (error);
895
896 if (ldi_get_size(vd_lh, &s)) {
897 (void) ldi_close(vd_lh, FREAD, kcred);
898 return (SET_ERROR(EIO));
899 }
900
901 size = P2ALIGN_TYPED(s, sizeof (vdev_label_t), uint64_t);
902 label = kmem_alloc(sizeof (vdev_label_t), KM_SLEEP);
903
904 *config = NULL;
905 for (l = 0; l < VDEV_LABELS; l++) {
906 uint64_t offset, state, txg = 0;
907
908 /* read vdev label */
909 offset = vdev_label_offset(size, l, 0);
910 if (vdev_disk_ldi_physio(vd_lh, (caddr_t)label,
911 VDEV_SKIP_SIZE + VDEV_PHYS_SIZE, offset, B_READ) != 0)
912 continue;
913
914 if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist,
915 sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) {
916 *config = NULL;
917 continue;
918 }
919
920 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE,
921 &state) != 0 || state >= POOL_STATE_DESTROYED) {
922 nvlist_free(*config);
923 *config = NULL;
924 continue;
925 }
926
927 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG,
928 &txg) != 0 || txg == 0) {
929 nvlist_free(*config);
930 *config = NULL;
931 continue;
932 }
933
934 break;
935 }
936
937 kmem_free(label, sizeof (vdev_label_t));
938 (void) ldi_close(vd_lh, FREAD, kcred);
939 if (*config == NULL)
940 error = SET_ERROR(EIDRM);
941
942 return (error);
943}
| 817}
818
819static void
820vdev_disk_io_done(zio_t *zio)
821{
822 vdev_t *vd = zio->io_vd;
823
824 /*
825 * If the device returned EIO, then attempt a DKIOCSTATE ioctl to see if
826 * the device has been removed. If this is the case, then we trigger an
827 * asynchronous removal of the device. Otherwise, probe the device and
828 * make sure it's still accessible.
829 */
830 if (zio->io_error == EIO && !vd->vdev_remove_wanted) {
831 vdev_disk_t *dvd = vd->vdev_tsd;
832 int state = DKIO_NONE;
833
834 if (ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state,
835 FKIOCTL, kcred, NULL) == 0 && state != DKIO_INSERTED) {
836 /*
837 * We post the resource as soon as possible, instead of
838 * when the async removal actually happens, because the
839 * DE is using this information to discard previous I/O
840 * errors.
841 */
842 zfs_post_remove(zio->io_spa, vd);
843 vd->vdev_remove_wanted = B_TRUE;
844 spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE);
845 } else if (!vd->vdev_delayed_close) {
846 vd->vdev_delayed_close = B_TRUE;
847 }
848 }
849}
850
851vdev_ops_t vdev_disk_ops = {
852 vdev_disk_open,
853 vdev_disk_close,
854 vdev_default_asize,
855 vdev_disk_io_start,
856 vdev_disk_io_done,
857 NULL,
858 vdev_disk_hold,
859 vdev_disk_rele,
860 VDEV_TYPE_DISK, /* name of this vdev type */
861 B_TRUE /* leaf vdev */
862};
863
864/*
865 * Given the root disk device devid or pathname, read the label from
866 * the device, and construct a configuration nvlist.
867 */
868int
869vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config)
870{
871 ldi_handle_t vd_lh;
872 vdev_label_t *label;
873 uint64_t s, size;
874 int l;
875 ddi_devid_t tmpdevid;
876 int error = -1;
877 char *minor_name;
878
879 /*
880 * Read the device label and build the nvlist.
881 */
882 if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid,
883 &minor_name) == 0) {
884 error = ldi_open_by_devid(tmpdevid, minor_name,
885 FREAD, kcred, &vd_lh, zfs_li);
886 ddi_devid_free(tmpdevid);
887 ddi_devid_str_free(minor_name);
888 }
889
890 if (error && (error = ldi_open_by_name(devpath, FREAD, kcred, &vd_lh,
891 zfs_li)))
892 return (error);
893
894 if (ldi_get_size(vd_lh, &s)) {
895 (void) ldi_close(vd_lh, FREAD, kcred);
896 return (SET_ERROR(EIO));
897 }
898
899 size = P2ALIGN_TYPED(s, sizeof (vdev_label_t), uint64_t);
900 label = kmem_alloc(sizeof (vdev_label_t), KM_SLEEP);
901
902 *config = NULL;
903 for (l = 0; l < VDEV_LABELS; l++) {
904 uint64_t offset, state, txg = 0;
905
906 /* read vdev label */
907 offset = vdev_label_offset(size, l, 0);
908 if (vdev_disk_ldi_physio(vd_lh, (caddr_t)label,
909 VDEV_SKIP_SIZE + VDEV_PHYS_SIZE, offset, B_READ) != 0)
910 continue;
911
912 if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist,
913 sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) {
914 *config = NULL;
915 continue;
916 }
917
918 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE,
919 &state) != 0 || state >= POOL_STATE_DESTROYED) {
920 nvlist_free(*config);
921 *config = NULL;
922 continue;
923 }
924
925 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG,
926 &txg) != 0 || txg == 0) {
927 nvlist_free(*config);
928 *config = NULL;
929 continue;
930 }
931
932 break;
933 }
934
935 kmem_free(label, sizeof (vdev_label_t));
936 (void) ldi_close(vd_lh, FREAD, kcred);
937 if (*config == NULL)
938 error = SET_ERROR(EIDRM);
939
940 return (error);
941}
|