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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2013 by Delphix. All rights reserved.
24 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
25 * Copyright 2013 Joyent, Inc. All rights reserved.
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>
35 #include <sys/sunldi.h>
36 #include <sys/efi_partition.h>
37 #include <sys/fm/fs/zfs.h>
40 * Virtual device vector for disks.
43 extern ldi_ident_t zfs_li;
46 vdev_disk_hold(vdev_t *vd)
51 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
54 * We must have a pathname, and it must be absolute.
56 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/')
60 * Only prefetch path and devid info if the device has
63 if (vd->vdev_tsd != NULL)
66 if (vd->vdev_wholedisk == -1ULL) {
67 size_t len = strlen(vd->vdev_path) + 3;
68 char *buf = kmem_alloc(len, KM_SLEEP);
70 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
72 (void) ldi_vp_from_name(buf, &vd->vdev_name_vp);
76 if (vd->vdev_name_vp == NULL)
77 (void) ldi_vp_from_name(vd->vdev_path, &vd->vdev_name_vp);
79 if (vd->vdev_devid != NULL &&
80 ddi_devid_str_decode(vd->vdev_devid, &devid, &minor) == 0) {
81 (void) ldi_vp_from_devid(devid, minor, &vd->vdev_devid_vp);
82 ddi_devid_str_free(minor);
83 ddi_devid_free(devid);
88 vdev_disk_rele(vdev_t *vd)
90 ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_WRITER));
92 if (vd->vdev_name_vp) {
93 VN_RELE_ASYNC(vd->vdev_name_vp,
94 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
95 vd->vdev_name_vp = NULL;
97 if (vd->vdev_devid_vp) {
98 VN_RELE_ASYNC(vd->vdev_devid_vp,
99 dsl_pool_vnrele_taskq(vd->vdev_spa->spa_dsl_pool));
100 vd->vdev_devid_vp = NULL;
105 vdev_disk_get_space(vdev_t *vd, uint64_t capacity, uint_t blksz)
107 ASSERT(vd->vdev_wholedisk);
109 vdev_disk_t *dvd = vd->vdev_tsd;
112 uint64_t avail_space = 0;
113 int efisize = EFI_LABEL_SIZE * 2;
115 dk_ioc.dki_data = kmem_alloc(efisize, KM_SLEEP);
117 dk_ioc.dki_length = efisize;
118 dk_ioc.dki_data_64 = (uint64_t)(uintptr_t)dk_ioc.dki_data;
119 efi = dk_ioc.dki_data;
121 if (ldi_ioctl(dvd->vd_lh, DKIOCGETEFI, (intptr_t)&dk_ioc,
122 FKIOCTL, kcred, NULL) == 0) {
123 uint64_t efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA);
125 zfs_dbgmsg("vdev %s, capacity %llu, altern lba %llu",
126 vd->vdev_path, capacity, efi_altern_lba);
127 if (capacity > efi_altern_lba)
128 avail_space = (capacity - efi_altern_lba) * blksz;
130 kmem_free(dk_ioc.dki_data, efisize);
131 return (avail_space);
135 * We want to be loud in DEBUG kernels when DKIOCGMEDIAINFOEXT fails, or when
136 * even a fallback to DKIOCGMEDIAINFO fails.
139 #define VDEV_DEBUG(...) cmn_err(CE_NOTE, __VA_ARGS__)
141 #define VDEV_DEBUG(...) /* Nothing... */
145 vdev_disk_open(vdev_t *vd, uint64_t *psize, uint64_t *max_psize,
148 spa_t *spa = vd->vdev_spa;
151 struct dk_minfo_ext ude;
154 struct dk_minfo_ext *dkmext = &dks.ude;
155 struct dk_minfo *dkm = &dks.ud;
159 boolean_t validate_devid = B_FALSE;
161 uint64_t capacity = 0, blksz = 0, pbsize;
164 * We must have a pathname, and it must be absolute.
166 if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
167 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
168 return (SET_ERROR(EINVAL));
172 * Reopen the device if it's not currently open. Otherwise,
173 * just update the physical size of the device.
175 if (vd->vdev_tsd != NULL) {
176 ASSERT(vd->vdev_reopening);
181 dvd = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_disk_t), KM_SLEEP);
184 * When opening a disk device, we want to preserve the user's original
185 * intent. We always want to open the device by the path the user gave
186 * us, even if it is one of multiple paths to the save device. But we
187 * also want to be able to survive disks being removed/recabled.
188 * Therefore the sequence of opening devices is:
190 * 1. Try opening the device by path. For legacy pools without the
191 * 'whole_disk' property, attempt to fix the path by appending 's0'.
193 * 2. If the devid of the device matches the stored value, return
196 * 3. Otherwise, the device may have moved. Try opening the device
197 * by the devid instead.
199 if (vd->vdev_devid != NULL) {
200 if (ddi_devid_str_decode(vd->vdev_devid, &dvd->vd_devid,
201 &dvd->vd_minor) != 0) {
202 vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
203 return (SET_ERROR(EINVAL));
207 error = EINVAL; /* presume failure */
209 if (vd->vdev_path != NULL) {
211 if (vd->vdev_wholedisk == -1ULL) {
212 size_t len = strlen(vd->vdev_path) + 3;
213 char *buf = kmem_alloc(len, KM_SLEEP);
216 (void) snprintf(buf, len, "%ss0", vd->vdev_path);
218 if (ldi_open_by_name(buf, spa_mode(spa), kcred,
220 spa_strfree(vd->vdev_path);
222 vd->vdev_wholedisk = 1ULL;
223 (void) ldi_close(lh, spa_mode(spa), kcred);
229 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa), kcred,
230 &dvd->vd_lh, zfs_li);
233 * Compare the devid to the stored value.
235 if (error == 0 && vd->vdev_devid != NULL &&
236 ldi_get_devid(dvd->vd_lh, &devid) == 0) {
237 if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
238 error = SET_ERROR(EINVAL);
239 (void) ldi_close(dvd->vd_lh, spa_mode(spa),
243 ddi_devid_free(devid);
247 * If we succeeded in opening the device, but 'vdev_wholedisk'
248 * is not yet set, then this must be a slice.
250 if (error == 0 && vd->vdev_wholedisk == -1ULL)
251 vd->vdev_wholedisk = 0;
255 * If we were unable to open by path, or the devid check fails, open by
258 if (error != 0 && vd->vdev_devid != NULL) {
259 error = ldi_open_by_devid(dvd->vd_devid, dvd->vd_minor,
260 spa_mode(spa), kcred, &dvd->vd_lh, zfs_li);
264 * If all else fails, then try opening by physical path (if available)
265 * or the logical path (if we failed due to the devid check). While not
266 * as reliable as the devid, this will give us something, and the higher
267 * level vdev validation will prevent us from opening the wrong device.
270 if (vd->vdev_devid != NULL)
271 validate_devid = B_TRUE;
273 if (vd->vdev_physpath != NULL &&
274 (dev = ddi_pathname_to_dev_t(vd->vdev_physpath)) != NODEV)
275 error = ldi_open_by_dev(&dev, OTYP_BLK, spa_mode(spa),
276 kcred, &dvd->vd_lh, zfs_li);
279 * Note that we don't support the legacy auto-wholedisk support
280 * as above. This hasn't been used in a very long time and we
281 * don't need to propagate its oddities to this edge condition.
283 if (error && vd->vdev_path != NULL)
284 error = ldi_open_by_name(vd->vdev_path, spa_mode(spa),
285 kcred, &dvd->vd_lh, zfs_li);
289 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
294 * Now that the device has been successfully opened, update the devid
297 if (validate_devid && spa_writeable(spa) &&
298 ldi_get_devid(dvd->vd_lh, &devid) == 0) {
299 if (ddi_devid_compare(devid, dvd->vd_devid) != 0) {
302 vd_devid = ddi_devid_str_encode(devid, dvd->vd_minor);
303 zfs_dbgmsg("vdev %s: update devid from %s, "
304 "to %s", vd->vdev_path, vd->vdev_devid, vd_devid);
305 spa_strfree(vd->vdev_devid);
306 vd->vdev_devid = spa_strdup(vd_devid);
307 ddi_devid_str_free(vd_devid);
309 ddi_devid_free(devid);
313 * Once a device is opened, verify that the physical device path (if
314 * available) is up to date.
316 if (ldi_get_dev(dvd->vd_lh, &dev) == 0 &&
317 ldi_get_otyp(dvd->vd_lh, &otyp) == 0) {
318 char *physpath, *minorname;
320 physpath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
322 if (ddi_dev_pathname(dev, otyp, physpath) == 0 &&
323 ldi_get_minor_name(dvd->vd_lh, &minorname) == 0 &&
324 (vd->vdev_physpath == NULL ||
325 strcmp(vd->vdev_physpath, physpath) != 0)) {
326 if (vd->vdev_physpath)
327 spa_strfree(vd->vdev_physpath);
328 (void) strlcat(physpath, ":", MAXPATHLEN);
329 (void) strlcat(physpath, minorname, MAXPATHLEN);
330 vd->vdev_physpath = spa_strdup(physpath);
333 kmem_free(minorname, strlen(minorname) + 1);
334 kmem_free(physpath, MAXPATHLEN);
339 * Determine the actual size of the device.
341 if (ldi_get_size(dvd->vd_lh, psize) != 0) {
342 vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
343 return (SET_ERROR(EINVAL));
349 * Determine the device's minimum transfer size.
350 * If the ioctl isn't supported, assume DEV_BSIZE.
352 if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFOEXT,
353 (intptr_t)dkmext, FKIOCTL, kcred, NULL)) == 0) {
354 capacity = dkmext->dki_capacity - 1;
355 blksz = dkmext->dki_lbsize;
356 pbsize = dkmext->dki_pbsize;
357 } else if ((error = ldi_ioctl(dvd->vd_lh, DKIOCGMEDIAINFO,
358 (intptr_t)dkm, FKIOCTL, kcred, NULL)) == 0) {
360 "vdev_disk_open(\"%s\"): fallback to DKIOCGMEDIAINFO\n",
362 capacity = dkm->dki_capacity - 1;
363 blksz = dkm->dki_lbsize;
366 VDEV_DEBUG("vdev_disk_open(\"%s\"): "
367 "both DKIOCGMEDIAINFO{,EXT} calls failed, %d\n",
368 vd->vdev_path, error);
372 *ashift = highbit(MAX(pbsize, SPA_MINBLOCKSIZE)) - 1;
374 if (vd->vdev_wholedisk == 1) {
379 * If we have the capability to expand, we'd have
380 * found out via success from DKIOCGMEDIAINFO{,EXT}.
381 * Adjust max_psize upward accordingly since we know
382 * we own the whole disk now.
384 *max_psize += vdev_disk_get_space(vd, capacity, blksz);
385 zfs_dbgmsg("capacity change: vdev %s, psize %llu, "
386 "max_psize %llu", vd->vdev_path, *psize,
391 * Since we own the whole disk, try to enable disk write
392 * caching. We ignore errors because it's OK if we can't do it.
394 (void) ldi_ioctl(dvd->vd_lh, DKIOCSETWCE, (intptr_t)&wce,
395 FKIOCTL, kcred, NULL);
399 * Clear the nowritecache bit, so that on a vdev_reopen() we will
402 vd->vdev_nowritecache = B_FALSE;
408 vdev_disk_close(vdev_t *vd)
410 vdev_disk_t *dvd = vd->vdev_tsd;
412 if (vd->vdev_reopening || dvd == NULL)
415 if (dvd->vd_minor != NULL)
416 ddi_devid_str_free(dvd->vd_minor);
418 if (dvd->vd_devid != NULL)
419 ddi_devid_free(dvd->vd_devid);
421 if (dvd->vd_lh != NULL)
422 (void) ldi_close(dvd->vd_lh, spa_mode(vd->vdev_spa), kcred);
424 vd->vdev_delayed_close = B_FALSE;
425 kmem_free(dvd, sizeof (vdev_disk_t));
430 vdev_disk_physio(vdev_t *vd, caddr_t data,
431 size_t size, uint64_t offset, int flags, boolean_t isdump)
433 vdev_disk_t *dvd = vd->vdev_tsd;
435 ASSERT(vd->vdev_ops == &vdev_disk_ops);
438 * If in the context of an active crash dump, use the ldi_dump(9F)
439 * call instead of ldi_strategy(9F) as usual.
442 ASSERT3P(dvd, !=, NULL);
443 return (ldi_dump(dvd->vd_lh, data, lbtodb(offset),
447 return (vdev_disk_ldi_physio(dvd->vd_lh, data, size, offset, flags));
451 vdev_disk_ldi_physio(ldi_handle_t vd_lh, caddr_t data,
452 size_t size, uint64_t offset, int flags)
458 return (SET_ERROR(EINVAL));
460 ASSERT(flags & B_READ || flags & B_WRITE);
462 bp = getrbuf(KM_SLEEP);
463 bp->b_flags = flags | B_BUSY | B_NOCACHE | B_FAILFAST;
465 bp->b_un.b_addr = (void *)data;
466 bp->b_lblkno = lbtodb(offset);
467 bp->b_bufsize = size;
469 error = ldi_strategy(vd_lh, bp);
471 if ((error = biowait(bp)) == 0 && bp->b_resid != 0)
472 error = SET_ERROR(EIO);
479 vdev_disk_io_intr(buf_t *bp)
481 vdev_buf_t *vb = (vdev_buf_t *)bp;
482 zio_t *zio = vb->vb_io;
485 * The rest of the zio stack only deals with EIO, ECKSUM, and ENXIO.
486 * Rather than teach the rest of the stack about other error
487 * possibilities (EFAULT, etc), we normalize the error value here.
489 zio->io_error = (geterror(bp) != 0 ? EIO : 0);
491 if (zio->io_error == 0 && bp->b_resid != 0)
492 zio->io_error = SET_ERROR(EIO);
494 kmem_free(vb, sizeof (vdev_buf_t));
500 vdev_disk_ioctl_free(zio_t *zio)
502 kmem_free(zio->io_vsd, sizeof (struct dk_callback));
505 static const zio_vsd_ops_t vdev_disk_vsd_ops = {
506 vdev_disk_ioctl_free,
507 zio_vsd_default_cksum_report
511 vdev_disk_ioctl_done(void *zio_arg, int error)
513 zio_t *zio = zio_arg;
515 zio->io_error = error;
521 vdev_disk_io_start(zio_t *zio)
523 vdev_t *vd = zio->io_vd;
524 vdev_disk_t *dvd = vd->vdev_tsd;
526 struct dk_callback *dkc;
530 if (zio->io_type == ZIO_TYPE_IOCTL) {
532 if (!vdev_readable(vd)) {
533 zio->io_error = SET_ERROR(ENXIO);
534 return (ZIO_PIPELINE_CONTINUE);
537 switch (zio->io_cmd) {
539 case DKIOCFLUSHWRITECACHE:
541 if (zfs_nocacheflush)
544 if (vd->vdev_nowritecache) {
545 zio->io_error = SET_ERROR(ENOTSUP);
549 zio->io_vsd = dkc = kmem_alloc(sizeof (*dkc), KM_SLEEP);
550 zio->io_vsd_ops = &vdev_disk_vsd_ops;
552 dkc->dkc_callback = vdev_disk_ioctl_done;
553 dkc->dkc_flag = FLUSH_VOLATILE;
554 dkc->dkc_cookie = zio;
556 error = ldi_ioctl(dvd->vd_lh, zio->io_cmd,
557 (uintptr_t)dkc, FKIOCTL, kcred, NULL);
561 * The ioctl will be done asychronously,
562 * and will call vdev_disk_ioctl_done()
565 return (ZIO_PIPELINE_STOP);
568 if (error == ENOTSUP || error == ENOTTY) {
570 * If we get ENOTSUP or ENOTTY, we know that
571 * no future attempts will ever succeed.
572 * In this case we set a persistent bit so
573 * that we don't bother with the ioctl in the
576 vd->vdev_nowritecache = B_TRUE;
578 zio->io_error = error;
583 zio->io_error = SET_ERROR(ENOTSUP);
586 return (ZIO_PIPELINE_CONTINUE);
589 vb = kmem_alloc(sizeof (vdev_buf_t), KM_SLEEP);
595 bp->b_flags = B_BUSY | B_NOCACHE |
596 (zio->io_type == ZIO_TYPE_READ ? B_READ : B_WRITE);
597 if (!(zio->io_flags & (ZIO_FLAG_IO_RETRY | ZIO_FLAG_TRYHARD)))
598 bp->b_flags |= B_FAILFAST;
599 bp->b_bcount = zio->io_size;
600 bp->b_un.b_addr = zio->io_data;
601 bp->b_lblkno = lbtodb(zio->io_offset);
602 bp->b_bufsize = zio->io_size;
603 bp->b_iodone = (int (*)())vdev_disk_io_intr;
605 /* ldi_strategy() will return non-zero only on programming errors */
606 VERIFY(ldi_strategy(dvd->vd_lh, bp) == 0);
608 return (ZIO_PIPELINE_STOP);
612 vdev_disk_io_done(zio_t *zio)
614 vdev_t *vd = zio->io_vd;
617 * If the device returned EIO, then attempt a DKIOCSTATE ioctl to see if
618 * the device has been removed. If this is the case, then we trigger an
619 * asynchronous removal of the device. Otherwise, probe the device and
620 * make sure it's still accessible.
622 if (zio->io_error == EIO && !vd->vdev_remove_wanted) {
623 vdev_disk_t *dvd = vd->vdev_tsd;
624 int state = DKIO_NONE;
626 if (ldi_ioctl(dvd->vd_lh, DKIOCSTATE, (intptr_t)&state,
627 FKIOCTL, kcred, NULL) == 0 && state != DKIO_INSERTED) {
629 * We post the resource as soon as possible, instead of
630 * when the async removal actually happens, because the
631 * DE is using this information to discard previous I/O
634 zfs_post_remove(zio->io_spa, vd);
635 vd->vdev_remove_wanted = B_TRUE;
636 spa_async_request(zio->io_spa, SPA_ASYNC_REMOVE);
637 } else if (!vd->vdev_delayed_close) {
638 vd->vdev_delayed_close = B_TRUE;
643 vdev_ops_t vdev_disk_ops = {
652 VDEV_TYPE_DISK, /* name of this vdev type */
653 B_TRUE /* leaf vdev */
657 * Given the root disk device devid or pathname, read the label from
658 * the device, and construct a configuration nvlist.
661 vdev_disk_read_rootlabel(char *devpath, char *devid, nvlist_t **config)
667 ddi_devid_t tmpdevid;
672 * Read the device label and build the nvlist.
674 if (devid != NULL && ddi_devid_str_decode(devid, &tmpdevid,
676 error = ldi_open_by_devid(tmpdevid, minor_name,
677 FREAD, kcred, &vd_lh, zfs_li);
678 ddi_devid_free(tmpdevid);
679 ddi_devid_str_free(minor_name);
682 if (error && (error = ldi_open_by_name(devpath, FREAD, kcred, &vd_lh,
686 if (ldi_get_size(vd_lh, &s)) {
687 (void) ldi_close(vd_lh, FREAD, kcred);
688 return (SET_ERROR(EIO));
691 size = P2ALIGN_TYPED(s, sizeof (vdev_label_t), uint64_t);
692 label = kmem_alloc(sizeof (vdev_label_t), KM_SLEEP);
695 for (l = 0; l < VDEV_LABELS; l++) {
696 uint64_t offset, state, txg = 0;
698 /* read vdev label */
699 offset = vdev_label_offset(size, l, 0);
700 if (vdev_disk_ldi_physio(vd_lh, (caddr_t)label,
701 VDEV_SKIP_SIZE + VDEV_PHYS_SIZE, offset, B_READ) != 0)
704 if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist,
705 sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) {
710 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE,
711 &state) != 0 || state >= POOL_STATE_DESTROYED) {
712 nvlist_free(*config);
717 if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG,
718 &txg) != 0 || txg == 0) {
719 nvlist_free(*config);
727 kmem_free(label, sizeof (vdev_label_t));
728 (void) ldi_close(vd_lh, FREAD, kcred);
730 error = SET_ERROR(EIDRM);