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]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2013, 2015 by Delphix. All rights reserved.
25 * Copyright (c) 2016 Intel Corporation.
26 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>.
30 * Functions to convert between a list of vdevs and an nvlist representing the
31 * configuration. Each entry in the list can be one of:
34 * disk=(path=..., devid=...)
43 * While the underlying implementation supports it, group vdevs cannot contain
44 * other group vdevs. All userland verification of devices is contained within
45 * this file. If successful, the nvlist returned can be passed directly to the
46 * kernel; we've done as much verification as possible in userland.
48 * Hot spares are a special case, and passed down as an array of disk vdevs, at
49 * the same level as the root of the vdev tree.
51 * The only function exported by this file is 'make_root_vdev'. The
52 * function performs several passes:
54 * 1. Construct the vdev specification. Performs syntax validation and
55 * makes sure each device is valid.
56 * 2. Check for devices in use. Using libblkid to make sure that no
57 * devices are also in use. Some can be overridden using the 'force'
58 * flag, others cannot.
59 * 3. Check for replication errors if the 'force' flag is not specified.
60 * validates that the replication level is consistent across the
62 * 4. Call libzfs to label any whole disks with an EFI label.
71 #include <libnvpair.h>
74 #include <scsi/scsi.h>
79 #include <sys/efi_partition.h>
82 #include <sys/mntent.h>
83 #include <uuid/uuid.h>
84 #include <blkid/blkid.h>
85 #include "zpool_util.h"
86 #include <sys/zfs_context.h>
89 * For any given vdev specification, we can have multiple errors. The
90 * vdev_error() function keeps track of whether we have seen an error yet, and
91 * prints out a header if its the first error we've seen.
96 typedef struct vdev_disk_db_entry
100 } vdev_disk_db_entry_t;
103 * Database of block devices that lie about physical sector sizes. The
104 * identification string must be precisely 24 characters to avoid false
107 static vdev_disk_db_entry_t vdev_disk_database[] = {
108 {"ATA ADATA SSD S396 3", 8192},
109 {"ATA APPLE SSD SM128E", 8192},
110 {"ATA APPLE SSD SM256E", 8192},
111 {"ATA APPLE SSD SM512E", 8192},
112 {"ATA APPLE SSD SM768E", 8192},
113 {"ATA C400-MTFDDAC064M", 8192},
114 {"ATA C400-MTFDDAC128M", 8192},
115 {"ATA C400-MTFDDAC256M", 8192},
116 {"ATA C400-MTFDDAC512M", 8192},
117 {"ATA Corsair Force 3 ", 8192},
118 {"ATA Corsair Force GS", 8192},
119 {"ATA INTEL SSDSA2CT04", 8192},
120 {"ATA INTEL SSDSA2BZ10", 8192},
121 {"ATA INTEL SSDSA2BZ20", 8192},
122 {"ATA INTEL SSDSA2BZ30", 8192},
123 {"ATA INTEL SSDSA2CW04", 8192},
124 {"ATA INTEL SSDSA2CW08", 8192},
125 {"ATA INTEL SSDSA2CW12", 8192},
126 {"ATA INTEL SSDSA2CW16", 8192},
127 {"ATA INTEL SSDSA2CW30", 8192},
128 {"ATA INTEL SSDSA2CW60", 8192},
129 {"ATA INTEL SSDSC2CT06", 8192},
130 {"ATA INTEL SSDSC2CT12", 8192},
131 {"ATA INTEL SSDSC2CT18", 8192},
132 {"ATA INTEL SSDSC2CT24", 8192},
133 {"ATA INTEL SSDSC2CW06", 8192},
134 {"ATA INTEL SSDSC2CW12", 8192},
135 {"ATA INTEL SSDSC2CW18", 8192},
136 {"ATA INTEL SSDSC2CW24", 8192},
137 {"ATA INTEL SSDSC2CW48", 8192},
138 {"ATA KINGSTON SH100S3", 8192},
139 {"ATA KINGSTON SH103S3", 8192},
140 {"ATA M4-CT064M4SSD2 ", 8192},
141 {"ATA M4-CT128M4SSD2 ", 8192},
142 {"ATA M4-CT256M4SSD2 ", 8192},
143 {"ATA M4-CT512M4SSD2 ", 8192},
144 {"ATA OCZ-AGILITY2 ", 8192},
145 {"ATA OCZ-AGILITY3 ", 8192},
146 {"ATA OCZ-VERTEX2 3.5 ", 8192},
147 {"ATA OCZ-VERTEX3 ", 8192},
148 {"ATA OCZ-VERTEX3 LT ", 8192},
149 {"ATA OCZ-VERTEX3 MI ", 8192},
150 {"ATA OCZ-VERTEX4 ", 8192},
151 {"ATA SAMSUNG MZ7WD120", 8192},
152 {"ATA SAMSUNG MZ7WD240", 8192},
153 {"ATA SAMSUNG MZ7WD480", 8192},
154 {"ATA SAMSUNG MZ7WD960", 8192},
155 {"ATA SAMSUNG SSD 830 ", 8192},
156 {"ATA Samsung SSD 840 ", 8192},
157 {"ATA SanDisk SSD U100", 8192},
158 {"ATA TOSHIBA THNSNH06", 8192},
159 {"ATA TOSHIBA THNSNH12", 8192},
160 {"ATA TOSHIBA THNSNH25", 8192},
161 {"ATA TOSHIBA THNSNH51", 8192},
162 {"ATA APPLE SSD TS064C", 4096},
163 {"ATA APPLE SSD TS128C", 4096},
164 {"ATA APPLE SSD TS256C", 4096},
165 {"ATA APPLE SSD TS512C", 4096},
166 {"ATA INTEL SSDSA2M040", 4096},
167 {"ATA INTEL SSDSA2M080", 4096},
168 {"ATA INTEL SSDSA2M160", 4096},
169 {"ATA INTEL SSDSC2MH12", 4096},
170 {"ATA INTEL SSDSC2MH25", 4096},
171 {"ATA OCZ CORE_SSD ", 4096},
172 {"ATA OCZ-VERTEX ", 4096},
173 {"ATA SAMSUNG MCCOE32G", 4096},
174 {"ATA SAMSUNG MCCOE64G", 4096},
175 {"ATA SAMSUNG SSD PM80", 4096},
176 /* Flash drives optimized for 4KB IOs on larger pages */
177 {"ATA INTEL SSDSC2BA10", 4096},
178 {"ATA INTEL SSDSC2BA20", 4096},
179 {"ATA INTEL SSDSC2BA40", 4096},
180 {"ATA INTEL SSDSC2BA80", 4096},
181 {"ATA INTEL SSDSC2BB08", 4096},
182 {"ATA INTEL SSDSC2BB12", 4096},
183 {"ATA INTEL SSDSC2BB16", 4096},
184 {"ATA INTEL SSDSC2BB24", 4096},
185 {"ATA INTEL SSDSC2BB30", 4096},
186 {"ATA INTEL SSDSC2BB40", 4096},
187 {"ATA INTEL SSDSC2BB48", 4096},
188 {"ATA INTEL SSDSC2BB60", 4096},
189 {"ATA INTEL SSDSC2BB80", 4096},
190 {"ATA INTEL SSDSC2BW24", 4096},
191 {"ATA INTEL SSDSC2BP24", 4096},
192 {"ATA INTEL SSDSC2BP48", 4096},
193 {"NA SmrtStorSDLKAE9W", 4096},
194 /* Imported from Open Solaris */
195 {"ATA MARVELL SD88SA02", 4096},
196 /* Advanced format Hard drives */
197 {"ATA Hitachi HDS5C303", 4096},
198 {"ATA SAMSUNG HD204UI ", 4096},
199 {"ATA ST2000DL004 HD20", 4096},
200 {"ATA WDC WD10EARS-00M", 4096},
201 {"ATA WDC WD10EARS-00S", 4096},
202 {"ATA WDC WD10EARS-00Z", 4096},
203 {"ATA WDC WD15EARS-00M", 4096},
204 {"ATA WDC WD15EARS-00S", 4096},
205 {"ATA WDC WD15EARS-00Z", 4096},
206 {"ATA WDC WD20EARS-00M", 4096},
207 {"ATA WDC WD20EARS-00S", 4096},
208 {"ATA WDC WD20EARS-00Z", 4096},
209 {"ATA WDC WD1600BEVT-0", 4096},
210 {"ATA WDC WD2500BEVT-0", 4096},
211 {"ATA WDC WD3200BEVT-0", 4096},
212 {"ATA WDC WD5000BEVT-0", 4096},
213 /* Virtual disks: Assume zvols with default volblocksize */
215 {"ATA QEMU HARDDISK ", 8192},
216 {"IET VIRTUAL-DISK ", 8192},
217 {"OI COMSTAR ", 8192},
218 {"SUN COMSTAR ", 8192},
219 {"NETAPP LUN ", 8192},
223 static const int vdev_disk_database_size =
224 sizeof (vdev_disk_database) / sizeof (vdev_disk_database[0]);
226 #define INQ_REPLY_LEN 96
227 #define INQ_CMD_LEN 6
230 check_sector_size_database(char *path, int *sector_size)
232 unsigned char inq_buff[INQ_REPLY_LEN];
233 unsigned char sense_buffer[32];
234 unsigned char inq_cmd_blk[INQ_CMD_LEN] =
235 {INQUIRY, 0, 0, 0, INQ_REPLY_LEN, 0};
241 /* Prepare INQUIRY command */
242 memset(&io_hdr, 0, sizeof (sg_io_hdr_t));
243 io_hdr.interface_id = 'S';
244 io_hdr.cmd_len = sizeof (inq_cmd_blk);
245 io_hdr.mx_sb_len = sizeof (sense_buffer);
246 io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
247 io_hdr.dxfer_len = INQ_REPLY_LEN;
248 io_hdr.dxferp = inq_buff;
249 io_hdr.cmdp = inq_cmd_blk;
250 io_hdr.sbp = sense_buffer;
251 io_hdr.timeout = 10; /* 10 milliseconds is ample time */
253 if ((fd = open(path, O_RDONLY|O_DIRECT)) < 0)
256 error = ioctl(fd, SG_IO, (unsigned long) &io_hdr);
263 if ((io_hdr.info & SG_INFO_OK_MASK) != SG_INFO_OK)
266 for (i = 0; i < vdev_disk_database_size; i++) {
267 if (memcmp(inq_buff + 8, vdev_disk_database[i].id, 24))
270 *sector_size = vdev_disk_database[i].sector_size;
279 vdev_error(const char *fmt, ...)
284 (void) fprintf(stderr, gettext("invalid vdev specification\n"));
286 (void) fprintf(stderr, gettext("use '-f' to override "
287 "the following errors:\n"));
289 (void) fprintf(stderr, gettext("the following errors "
290 "must be manually repaired:\n"));
295 (void) vfprintf(stderr, fmt, ap);
300 * Check that a file is valid. All we can do in this case is check that it's
301 * not in use by another pool, and not in use by swap.
304 check_file(const char *file, boolean_t force, boolean_t isspare)
312 if ((fd = open(file, O_RDONLY)) < 0)
315 if (zpool_in_use(g_zfs, fd, &state, &name, &inuse) == 0 && inuse) {
319 case POOL_STATE_ACTIVE:
320 desc = gettext("active");
323 case POOL_STATE_EXPORTED:
324 desc = gettext("exported");
327 case POOL_STATE_POTENTIALLY_ACTIVE:
328 desc = gettext("potentially active");
332 desc = gettext("unknown");
337 * Allow hot spares to be shared between pools.
339 if (state == POOL_STATE_SPARE && isspare) {
345 if (state == POOL_STATE_ACTIVE ||
346 state == POOL_STATE_SPARE || !force) {
348 case POOL_STATE_SPARE:
349 vdev_error(gettext("%s is reserved as a hot "
350 "spare for pool %s\n"), file, name);
353 vdev_error(gettext("%s is part of %s pool "
354 "'%s'\n"), file, desc, name);
370 (void) fprintf(stderr, gettext("warning: device in use checking "
371 "failed: %s\n"), strerror(err));
375 check_slice(const char *path, blkid_cache cache, int force, boolean_t isspare)
380 /* No valid type detected device is safe to use */
381 value = blkid_get_tag_value(cache, "TYPE", path);
386 * If libblkid detects a ZFS device, we check the device
387 * using check_file() to see if it's safe. The one safe
388 * case is a spare device shared between multiple pools.
390 if (strcmp(value, "zfs_member") == 0) {
391 err = check_file(path, force, isspare);
397 vdev_error(gettext("%s contains a filesystem of "
398 "type '%s'\n"), path, value);
408 * Validate that a disk including all partitions are safe to use.
410 * For EFI labeled disks this can done relatively easily with the libefi
411 * library. The partition numbers are extracted from the label and used
412 * to generate the expected /dev/ paths. Each partition can then be
413 * checked for conflicts.
415 * For non-EFI labeled disks (MBR/EBR/etc) the same process is possible
416 * but due to the lack of a readily available libraries this scanning is
417 * not implemented. Instead only the device path as given is checked.
420 check_disk(const char *path, blkid_cache cache, int force,
421 boolean_t isspare, boolean_t iswholedisk)
424 char slice_path[MAXPATHLEN];
429 return (check_slice(path, cache, force, isspare));
431 if ((fd = open(path, O_RDONLY|O_DIRECT)) < 0) {
437 * Expected to fail for non-EFI labled disks. Just check the device
438 * as given and do not attempt to detect and scan partitions.
440 err = efi_alloc_and_read(fd, &vtoc);
443 return (check_slice(path, cache, force, isspare));
447 * The primary efi partition label is damaged however the secondary
448 * label at the end of the device is intact. Rather than use this
449 * label we should play it safe and treat this as a non efi device.
451 if (vtoc->efi_flags & EFI_GPT_PRIMARY_CORRUPT) {
456 /* Partitions will now be created using the backup */
459 vdev_error(gettext("%s contains a corrupt primary "
460 "EFI label.\n"), path);
465 for (i = 0; i < vtoc->efi_nparts; i++) {
467 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED ||
468 uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_guid))
471 if (strncmp(path, UDISK_ROOT, strlen(UDISK_ROOT)) == 0)
472 (void) snprintf(slice_path, sizeof (slice_path),
473 "%s%s%d", path, "-part", i+1);
475 (void) snprintf(slice_path, sizeof (slice_path),
476 "%s%s%d", path, isdigit(path[strlen(path)-1]) ?
479 err = check_slice(slice_path, cache, force, isspare);
491 check_device(const char *path, boolean_t force,
492 boolean_t isspare, boolean_t iswholedisk)
497 error = blkid_get_cache(&cache, NULL);
503 error = check_disk(path, cache, force, isspare, iswholedisk);
504 blkid_put_cache(cache);
510 * This may be a shorthand device path or it could be total gibberish.
511 * Check to see if it is a known device available in zfs_vdev_paths.
512 * As part of this check, see if we've been given an entire disk
513 * (minus the slice number).
516 is_shorthand_path(const char *arg, char *path, size_t path_size,
517 struct stat64 *statbuf, boolean_t *wholedisk)
521 error = zfs_resolve_shortname(arg, path, path_size);
523 *wholedisk = zfs_dev_is_whole_disk(path);
524 if (*wholedisk || (stat64(path, statbuf) == 0))
528 strlcpy(path, arg, path_size);
529 memset(statbuf, 0, sizeof (*statbuf));
530 *wholedisk = B_FALSE;
536 * Determine if the given path is a hot spare within the given configuration.
537 * If no configuration is given we rely solely on the label.
540 is_spare(nvlist_t *config, const char *path)
546 uint64_t guid, spareguid;
552 if ((fd = open(path, O_RDONLY)) < 0)
555 if (zpool_in_use(g_zfs, fd, &state, &name, &inuse) != 0 ||
557 state != POOL_STATE_SPARE ||
558 zpool_read_label(fd, &label, NULL) != 0) {
566 if (config == NULL) {
571 verify(nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) == 0);
574 verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
576 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
577 &spares, &nspares) == 0) {
578 for (i = 0; i < nspares; i++) {
579 verify(nvlist_lookup_uint64(spares[i],
580 ZPOOL_CONFIG_GUID, &spareguid) == 0);
581 if (spareguid == guid)
590 * Create a leaf vdev. Determine if this is a file or a device. If it's a
591 * device, fill in the device id to make a complete nvlist. Valid forms for a
594 * /dev/xxx Complete disk path
595 * /xxx Full path to file
596 * xxx Shorthand for <zfs_vdev_paths>/xxx
599 make_leaf_vdev(nvlist_t *props, const char *arg, uint64_t is_log)
601 char path[MAXPATHLEN];
602 struct stat64 statbuf;
603 nvlist_t *vdev = NULL;
605 boolean_t wholedisk = B_FALSE;
610 * Determine what type of vdev this is, and put the full path into
611 * 'path'. We detect whether this is a device of file afterwards by
612 * checking the st_mode of the file.
616 * Complete device or file path. Exact type is determined by
617 * examining the file descriptor afterwards. Symbolic links
618 * are resolved to their real paths to determine whole disk
619 * and S_ISBLK/S_ISREG type checks. However, we are careful
620 * to store the given path as ZPOOL_CONFIG_PATH to ensure we
621 * can leverage udev's persistent device labels.
623 if (realpath(arg, path) == NULL) {
624 (void) fprintf(stderr,
625 gettext("cannot resolve path '%s'\n"), arg);
629 wholedisk = zfs_dev_is_whole_disk(path);
630 if (!wholedisk && (stat64(path, &statbuf) != 0)) {
631 (void) fprintf(stderr,
632 gettext("cannot open '%s': %s\n"),
633 path, strerror(errno));
637 /* After whole disk check restore original passed path */
638 strlcpy(path, arg, sizeof (path));
640 err = is_shorthand_path(arg, path, sizeof (path),
641 &statbuf, &wholedisk);
644 * If we got ENOENT, then the user gave us
645 * gibberish, so try to direct them with a
646 * reasonable error message. Otherwise,
647 * regurgitate strerror() since it's the best we
651 (void) fprintf(stderr,
652 gettext("cannot open '%s': no such "
653 "device in %s\n"), arg, DISK_ROOT);
654 (void) fprintf(stderr,
655 gettext("must be a full path or "
656 "shorthand device name\n"));
659 (void) fprintf(stderr,
660 gettext("cannot open '%s': %s\n"),
661 path, strerror(errno));
668 * Determine whether this is a device or a file.
670 if (wholedisk || S_ISBLK(statbuf.st_mode)) {
671 type = VDEV_TYPE_DISK;
672 } else if (S_ISREG(statbuf.st_mode)) {
673 type = VDEV_TYPE_FILE;
675 (void) fprintf(stderr, gettext("cannot use '%s': must be a "
676 "block device or regular file\n"), path);
681 * Finally, we have the complete device or file, and we know that it is
682 * acceptable to use. Construct the nvlist to describe this vdev. All
683 * vdevs have a 'path' element, and devices also have a 'devid' element.
685 verify(nvlist_alloc(&vdev, NV_UNIQUE_NAME, 0) == 0);
686 verify(nvlist_add_string(vdev, ZPOOL_CONFIG_PATH, path) == 0);
687 verify(nvlist_add_string(vdev, ZPOOL_CONFIG_TYPE, type) == 0);
688 verify(nvlist_add_uint64(vdev, ZPOOL_CONFIG_IS_LOG, is_log) == 0);
689 if (strcmp(type, VDEV_TYPE_DISK) == 0)
690 verify(nvlist_add_uint64(vdev, ZPOOL_CONFIG_WHOLE_DISK,
691 (uint64_t)wholedisk) == 0);
694 * Override defaults if custom properties are provided.
699 if (nvlist_lookup_string(props,
700 zpool_prop_to_name(ZPOOL_PROP_ASHIFT), &value) == 0) {
701 if (zfs_nicestrtonum(NULL, value, &ashift) != 0) {
702 (void) fprintf(stderr,
703 gettext("ashift must be a number.\n"));
707 (ashift < ASHIFT_MIN || ashift > ASHIFT_MAX)) {
708 (void) fprintf(stderr,
709 gettext("invalid 'ashift=%" PRIu64 "' "
710 "property: only values between %" PRId32 " "
711 "and %" PRId32 " are allowed.\n"),
712 ashift, ASHIFT_MIN, ASHIFT_MAX);
719 * If the device is known to incorrectly report its physical sector
720 * size explicitly provide the known correct value.
725 if (check_sector_size_database(path, §or_size) == B_TRUE)
726 ashift = highbit64(sector_size) - 1;
730 (void) nvlist_add_uint64(vdev, ZPOOL_CONFIG_ASHIFT, ashift);
736 * Go through and verify the replication level of the pool is consistent.
737 * Performs the following checks:
739 * For the new spec, verifies that devices in mirrors and raidz are the
742 * If the current configuration already has inconsistent replication
743 * levels, ignore any other potential problems in the new spec.
745 * Otherwise, make sure that the current spec (if there is one) and the new
746 * spec have consistent replication levels.
748 typedef struct replication_level {
750 uint64_t zprl_children;
751 uint64_t zprl_parity;
752 } replication_level_t;
754 #define ZPOOL_FUZZ (16 * 1024 * 1024)
757 is_raidz_mirror(replication_level_t *a, replication_level_t *b,
758 replication_level_t **raidz, replication_level_t **mirror)
760 if (strcmp(a->zprl_type, "raidz") == 0 &&
761 strcmp(b->zprl_type, "mirror") == 0) {
770 * Given a list of toplevel vdevs, return the current replication level. If
771 * the config is inconsistent, then NULL is returned. If 'fatal' is set, then
772 * an error message will be displayed for each self-inconsistent vdev.
774 static replication_level_t *
775 get_replication(nvlist_t *nvroot, boolean_t fatal)
783 replication_level_t lastrep = {0};
784 replication_level_t rep;
785 replication_level_t *ret;
786 replication_level_t *raidz, *mirror;
787 boolean_t dontreport;
789 ret = safe_malloc(sizeof (replication_level_t));
791 verify(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
792 &top, &toplevels) == 0);
794 for (t = 0; t < toplevels; t++) {
795 uint64_t is_log = B_FALSE;
800 * For separate logs we ignore the top level vdev replication
803 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &is_log);
807 verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE,
809 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
810 &child, &children) != 0) {
812 * This is a 'file' or 'disk' vdev.
814 rep.zprl_type = type;
815 rep.zprl_children = 1;
821 * This is a mirror or RAID-Z vdev. Go through and make
822 * sure the contents are all the same (files vs. disks),
823 * keeping track of the number of elements in the
826 * We also check that the size of each vdev (if it can
827 * be determined) is the same.
829 rep.zprl_type = type;
830 rep.zprl_children = 0;
832 if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) {
833 verify(nvlist_lookup_uint64(nv,
834 ZPOOL_CONFIG_NPARITY,
835 &rep.zprl_parity) == 0);
836 assert(rep.zprl_parity != 0);
842 * The 'dontreport' variable indicates that we've
843 * already reported an error for this spec, so don't
844 * bother doing it again.
849 for (c = 0; c < children; c++) {
850 nvlist_t *cnv = child[c];
852 struct stat64 statbuf;
853 uint64_t size = -1ULL;
859 verify(nvlist_lookup_string(cnv,
860 ZPOOL_CONFIG_TYPE, &childtype) == 0);
863 * If this is a replacing or spare vdev, then
864 * get the real first child of the vdev.
866 if (strcmp(childtype,
867 VDEV_TYPE_REPLACING) == 0 ||
868 strcmp(childtype, VDEV_TYPE_SPARE) == 0) {
872 verify(nvlist_lookup_nvlist_array(cnv,
873 ZPOOL_CONFIG_CHILDREN, &rchild,
875 assert(rchildren == 2);
878 verify(nvlist_lookup_string(cnv,
883 verify(nvlist_lookup_string(cnv,
884 ZPOOL_CONFIG_PATH, &path) == 0);
887 * If we have a raidz/mirror that combines disks
888 * with files, report it as an error.
890 if (!dontreport && type != NULL &&
891 strcmp(type, childtype) != 0) {
897 "mismatched replication "
898 "level: %s contains both "
899 "files and devices\n"),
907 * According to stat(2), the value of 'st_size'
908 * is undefined for block devices and character
909 * devices. But there is no effective way to
910 * determine the real size in userland.
912 * Instead, we'll take advantage of an
913 * implementation detail of spec_size(). If the
914 * device is currently open, then we (should)
915 * return a valid size.
917 * If we still don't get a valid size (indicated
918 * by a size of 0 or MAXOFFSET_T), then ignore
919 * this device altogether.
921 if ((fd = open(path, O_RDONLY)) >= 0) {
922 err = fstat64(fd, &statbuf);
925 err = stat64(path, &statbuf);
929 statbuf.st_size == 0 ||
930 statbuf.st_size == MAXOFFSET_T)
933 size = statbuf.st_size;
936 * Also make sure that devices and
937 * slices have a consistent size. If
938 * they differ by a significant amount
939 * (~16MB) then report an error.
942 (vdev_size != -1ULL &&
943 (labs(size - vdev_size) >
950 "%s contains devices of "
951 "different sizes\n"),
964 * At this point, we have the replication of the last toplevel
965 * vdev in 'rep'. Compare it to 'lastrep' to see if its
968 if (lastrep.zprl_type != NULL) {
969 if (is_raidz_mirror(&lastrep, &rep, &raidz, &mirror) ||
970 is_raidz_mirror(&rep, &lastrep, &raidz, &mirror)) {
972 * Accepted raidz and mirror when they can
973 * handle the same number of disk failures.
975 if (raidz->zprl_parity !=
976 mirror->zprl_children - 1) {
982 "mismatched replication "
984 "%s and %s vdevs with "
985 "different redundancy, "
986 "%llu vs. %llu (%llu-way) "
991 mirror->zprl_children - 1,
992 mirror->zprl_children);
996 } else if (strcmp(lastrep.zprl_type, rep.zprl_type) !=
1003 "mismatched replication level: "
1004 "both %s and %s vdevs are "
1006 lastrep.zprl_type, rep.zprl_type);
1009 } else if (lastrep.zprl_parity != rep.zprl_parity) {
1015 "mismatched replication level: "
1016 "both %llu and %llu device parity "
1017 "%s vdevs are present\n"),
1018 lastrep.zprl_parity,
1023 } else if (lastrep.zprl_children != rep.zprl_children) {
1029 "mismatched replication level: "
1030 "both %llu-way and %llu-way %s "
1031 "vdevs are present\n"),
1032 lastrep.zprl_children,
1049 * Check the replication level of the vdev spec against the current pool. Calls
1050 * get_replication() to make sure the new spec is self-consistent. If the pool
1051 * has a consistent replication level, then we ignore any errors. Otherwise,
1052 * report any difference between the two.
1055 check_replication(nvlist_t *config, nvlist_t *newroot)
1059 replication_level_t *current = NULL, *new;
1063 * If we have a current pool configuration, check to see if it's
1064 * self-consistent. If not, simply return success.
1066 if (config != NULL) {
1069 verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
1071 if ((current = get_replication(nvroot, B_FALSE)) == NULL)
1075 * for spares there may be no children, and therefore no
1076 * replication level to check
1078 if ((nvlist_lookup_nvlist_array(newroot, ZPOOL_CONFIG_CHILDREN,
1079 &child, &children) != 0) || (children == 0)) {
1085 * If all we have is logs then there's no replication level to check.
1087 if (num_logs(newroot) == children) {
1093 * Get the replication level of the new vdev spec, reporting any
1094 * inconsistencies found.
1096 if ((new = get_replication(newroot, B_TRUE)) == NULL) {
1102 * Check to see if the new vdev spec matches the replication level of
1106 if (current != NULL) {
1107 if (strcmp(current->zprl_type, new->zprl_type) != 0) {
1109 "mismatched replication level: pool uses %s "
1110 "and new vdev is %s\n"),
1111 current->zprl_type, new->zprl_type);
1113 } else if (current->zprl_parity != new->zprl_parity) {
1115 "mismatched replication level: pool uses %llu "
1116 "device parity and new vdev uses %llu\n"),
1117 current->zprl_parity, new->zprl_parity);
1119 } else if (current->zprl_children != new->zprl_children) {
1121 "mismatched replication level: pool uses %llu-way "
1122 "%s and new vdev uses %llu-way %s\n"),
1123 current->zprl_children, current->zprl_type,
1124 new->zprl_children, new->zprl_type);
1130 if (current != NULL)
1137 zero_label(char *path)
1139 const int size = 4096;
1143 if ((fd = open(path, O_WRONLY|O_EXCL)) < 0) {
1144 (void) fprintf(stderr, gettext("cannot open '%s': %s\n"),
1145 path, strerror(errno));
1149 memset(buf, 0, size);
1150 err = write(fd, buf, size);
1151 (void) fdatasync(fd);
1155 (void) fprintf(stderr, gettext("cannot zero first %d bytes "
1156 "of '%s': %s\n"), size, path, strerror(errno));
1161 (void) fprintf(stderr, gettext("could only zero %d/%d bytes "
1162 "of '%s'\n"), err, size, path);
1170 * Go through and find any whole disks in the vdev specification, labelling them
1171 * as appropriate. When constructing the vdev spec, we were unable to open this
1172 * device in order to provide a devid. Now that we have labelled the disk and
1173 * know that slice 0 is valid, we can construct the devid now.
1175 * If the disk was already labeled with an EFI label, we will have gotten the
1176 * devid already (because we were able to open the whole disk). Otherwise, we
1177 * need to get the devid after we label the disk.
1180 make_disks(zpool_handle_t *zhp, nvlist_t *nv)
1185 char devpath[MAXPATHLEN];
1186 char udevpath[MAXPATHLEN];
1188 struct stat64 statbuf;
1189 int is_exclusive = 0;
1193 verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
1195 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
1196 &child, &children) != 0) {
1198 if (strcmp(type, VDEV_TYPE_DISK) != 0)
1202 * We have a disk device. If this is a whole disk write
1203 * out the efi partition table, otherwise write zero's to
1204 * the first 4k of the partition. This is to ensure that
1205 * libblkid will not misidentify the partition due to a
1206 * magic value left by the previous filesystem.
1208 verify(!nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path));
1209 verify(!nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
1214 * Update device id string for mpath nodes (Linux only)
1216 if (is_mpath_whole_disk(path))
1217 update_vdev_config_dev_strs(nv);
1219 (void) zero_label(path);
1223 if (realpath(path, devpath) == NULL) {
1225 (void) fprintf(stderr,
1226 gettext("cannot resolve path '%s'\n"), path);
1231 * Remove any previously existing symlink from a udev path to
1232 * the device before labeling the disk. This ensures that
1233 * only newly created links are used. Otherwise there is a
1234 * window between when udev deletes and recreates the link
1235 * during which access attempts will fail with ENOENT.
1237 strlcpy(udevpath, path, MAXPATHLEN);
1238 (void) zfs_append_partition(udevpath, MAXPATHLEN);
1240 fd = open(devpath, O_RDWR|O_EXCL);
1249 * If the partition exists, contains a valid spare label,
1250 * and is opened exclusively there is no need to partition
1251 * it. Hot spares have already been partitioned and are
1252 * held open exclusively by the kernel as a safety measure.
1254 * If the provided path is for a /dev/disk/ device its
1255 * symbolic link will be removed, partition table created,
1256 * and then block until udev creates the new link.
1258 if (!is_exclusive || !is_spare(NULL, udevpath)) {
1259 char *devnode = strrchr(devpath, '/') + 1;
1261 ret = strncmp(udevpath, UDISK_ROOT, strlen(UDISK_ROOT));
1263 ret = lstat64(udevpath, &statbuf);
1264 if (ret == 0 && S_ISLNK(statbuf.st_mode))
1265 (void) unlink(udevpath);
1269 * When labeling a pool the raw device node name
1270 * is provided as it appears under /dev/.
1272 if (zpool_label_disk(g_zfs, zhp, devnode) == -1)
1276 * Wait for udev to signal the device is available
1277 * by the provided path.
1279 ret = zpool_label_disk_wait(udevpath, DISK_LABEL_WAIT);
1281 (void) fprintf(stderr,
1282 gettext("missing link: %s was "
1283 "partitioned but %s is missing\n"),
1288 ret = zero_label(udevpath);
1294 * Update the path to refer to the partition. The presence of
1295 * the 'whole_disk' field indicates to the CLI that we should
1296 * chop off the partition number when displaying the device in
1299 verify(nvlist_add_string(nv, ZPOOL_CONFIG_PATH, udevpath) == 0);
1302 * Update device id strings for whole disks (Linux only)
1304 update_vdev_config_dev_strs(nv);
1309 for (c = 0; c < children; c++)
1310 if ((ret = make_disks(zhp, child[c])) != 0)
1313 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
1314 &child, &children) == 0)
1315 for (c = 0; c < children; c++)
1316 if ((ret = make_disks(zhp, child[c])) != 0)
1319 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
1320 &child, &children) == 0)
1321 for (c = 0; c < children; c++)
1322 if ((ret = make_disks(zhp, child[c])) != 0)
1329 * Go through and find any devices that are in use. We rely on libdiskmgt for
1330 * the majority of this task.
1333 is_device_in_use(nvlist_t *config, nvlist_t *nv, boolean_t force,
1334 boolean_t replacing, boolean_t isspare)
1340 char buf[MAXPATHLEN];
1341 uint64_t wholedisk = B_FALSE;
1342 boolean_t anyinuse = B_FALSE;
1344 verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
1346 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
1347 &child, &children) != 0) {
1349 verify(!nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path));
1350 if (strcmp(type, VDEV_TYPE_DISK) == 0)
1351 verify(!nvlist_lookup_uint64(nv,
1352 ZPOOL_CONFIG_WHOLE_DISK, &wholedisk));
1355 * As a generic check, we look to see if this is a replace of a
1356 * hot spare within the same pool. If so, we allow it
1357 * regardless of what libblkid or zpool_in_use() says.
1360 (void) strlcpy(buf, path, sizeof (buf));
1362 ret = zfs_append_partition(buf, sizeof (buf));
1367 if (is_spare(config, buf))
1371 if (strcmp(type, VDEV_TYPE_DISK) == 0)
1372 ret = check_device(path, force, isspare, wholedisk);
1374 else if (strcmp(type, VDEV_TYPE_FILE) == 0)
1375 ret = check_file(path, force, isspare);
1380 for (c = 0; c < children; c++)
1381 if (is_device_in_use(config, child[c], force, replacing,
1385 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
1386 &child, &children) == 0)
1387 for (c = 0; c < children; c++)
1388 if (is_device_in_use(config, child[c], force, replacing,
1392 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
1393 &child, &children) == 0)
1394 for (c = 0; c < children; c++)
1395 if (is_device_in_use(config, child[c], force, replacing,
1403 is_grouping(const char *type, int *mindev, int *maxdev)
1405 if (strncmp(type, "raidz", 5) == 0) {
1406 const char *p = type + 5;
1412 } else if (*p == '0') {
1413 return (NULL); /* no zero prefixes allowed */
1416 nparity = strtol(p, &end, 10);
1417 if (errno != 0 || nparity < 1 || nparity >= 255 ||
1423 *mindev = nparity + 1;
1426 return (VDEV_TYPE_RAIDZ);
1432 if (strcmp(type, "mirror") == 0) {
1435 return (VDEV_TYPE_MIRROR);
1438 if (strcmp(type, "spare") == 0) {
1441 return (VDEV_TYPE_SPARE);
1444 if (strcmp(type, "log") == 0) {
1447 return (VDEV_TYPE_LOG);
1450 if (strcmp(type, "cache") == 0) {
1453 return (VDEV_TYPE_L2CACHE);
1460 * Construct a syntactically valid vdev specification,
1461 * and ensure that all devices and files exist and can be opened.
1462 * Note: we don't bother freeing anything in the error paths
1463 * because the program is just going to exit anyway.
1466 construct_spec(nvlist_t *props, int argc, char **argv)
1468 nvlist_t *nvroot, *nv, **top, **spares, **l2cache;
1469 int t, toplevels, mindev, maxdev, nspares, nlogs, nl2cache;
1472 boolean_t seen_logs;
1482 seen_logs = B_FALSE;
1489 * If it's a mirror or raidz, the subsequent arguments are
1490 * its leaves -- until we encounter the next mirror or raidz.
1492 if ((type = is_grouping(argv[0], &mindev, &maxdev)) != NULL) {
1493 nvlist_t **child = NULL;
1494 int c, children = 0;
1496 if (strcmp(type, VDEV_TYPE_SPARE) == 0) {
1497 if (spares != NULL) {
1498 (void) fprintf(stderr,
1499 gettext("invalid vdev "
1500 "specification: 'spare' can be "
1501 "specified only once\n"));
1507 if (strcmp(type, VDEV_TYPE_LOG) == 0) {
1509 (void) fprintf(stderr,
1510 gettext("invalid vdev "
1511 "specification: 'log' can be "
1512 "specified only once\n"));
1520 * A log is not a real grouping device.
1521 * We just set is_log and continue.
1526 if (strcmp(type, VDEV_TYPE_L2CACHE) == 0) {
1527 if (l2cache != NULL) {
1528 (void) fprintf(stderr,
1529 gettext("invalid vdev "
1530 "specification: 'cache' can be "
1531 "specified only once\n"));
1538 if (strcmp(type, VDEV_TYPE_MIRROR) != 0) {
1539 (void) fprintf(stderr,
1540 gettext("invalid vdev "
1541 "specification: unsupported 'log' "
1542 "device: %s\n"), type);
1548 for (c = 1; c < argc; c++) {
1549 if (is_grouping(argv[c], NULL, NULL) != NULL)
1552 child = realloc(child,
1553 children * sizeof (nvlist_t *));
1556 if ((nv = make_leaf_vdev(props, argv[c],
1557 B_FALSE)) == NULL) {
1558 for (c = 0; c < children - 1; c++)
1559 nvlist_free(child[c]);
1564 child[children - 1] = nv;
1567 if (children < mindev) {
1568 (void) fprintf(stderr, gettext("invalid vdev "
1569 "specification: %s requires at least %d "
1570 "devices\n"), argv[0], mindev);
1571 for (c = 0; c < children; c++)
1572 nvlist_free(child[c]);
1577 if (children > maxdev) {
1578 (void) fprintf(stderr, gettext("invalid vdev "
1579 "specification: %s supports no more than "
1580 "%d devices\n"), argv[0], maxdev);
1581 for (c = 0; c < children; c++)
1582 nvlist_free(child[c]);
1590 if (strcmp(type, VDEV_TYPE_SPARE) == 0) {
1594 } else if (strcmp(type, VDEV_TYPE_L2CACHE) == 0) {
1596 nl2cache = children;
1599 verify(nvlist_alloc(&nv, NV_UNIQUE_NAME,
1601 verify(nvlist_add_string(nv, ZPOOL_CONFIG_TYPE,
1603 verify(nvlist_add_uint64(nv,
1604 ZPOOL_CONFIG_IS_LOG, is_log) == 0);
1605 if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) {
1606 verify(nvlist_add_uint64(nv,
1607 ZPOOL_CONFIG_NPARITY,
1610 verify(nvlist_add_nvlist_array(nv,
1611 ZPOOL_CONFIG_CHILDREN, child,
1614 for (c = 0; c < children; c++)
1615 nvlist_free(child[c]);
1620 * We have a device. Pass off to make_leaf_vdev() to
1621 * construct the appropriate nvlist describing the vdev.
1623 if ((nv = make_leaf_vdev(props, argv[0],
1634 top = realloc(top, toplevels * sizeof (nvlist_t *));
1637 top[toplevels - 1] = nv;
1640 if (toplevels == 0 && nspares == 0 && nl2cache == 0) {
1641 (void) fprintf(stderr, gettext("invalid vdev "
1642 "specification: at least one toplevel vdev must be "
1647 if (seen_logs && nlogs == 0) {
1648 (void) fprintf(stderr, gettext("invalid vdev specification: "
1649 "log requires at least 1 device\n"));
1654 * Finally, create nvroot and add all top-level vdevs to it.
1656 verify(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) == 0);
1657 verify(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
1658 VDEV_TYPE_ROOT) == 0);
1659 verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
1660 top, toplevels) == 0);
1662 verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
1663 spares, nspares) == 0);
1665 verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
1666 l2cache, nl2cache) == 0);
1669 for (t = 0; t < toplevels; t++)
1670 nvlist_free(top[t]);
1671 for (t = 0; t < nspares; t++)
1672 nvlist_free(spares[t]);
1673 for (t = 0; t < nl2cache; t++)
1674 nvlist_free(l2cache[t]);
1684 split_mirror_vdev(zpool_handle_t *zhp, char *newname, nvlist_t *props,
1685 splitflags_t flags, int argc, char **argv)
1687 nvlist_t *newroot = NULL, **child;
1691 if ((newroot = construct_spec(props, argc, argv)) == NULL) {
1692 (void) fprintf(stderr, gettext("Unable to build a "
1693 "pool from the specified devices\n"));
1697 if (!flags.dryrun && make_disks(zhp, newroot) != 0) {
1698 nvlist_free(newroot);
1702 /* avoid any tricks in the spec */
1703 verify(nvlist_lookup_nvlist_array(newroot,
1704 ZPOOL_CONFIG_CHILDREN, &child, &children) == 0);
1705 for (c = 0; c < children; c++) {
1710 verify(nvlist_lookup_string(child[c],
1711 ZPOOL_CONFIG_PATH, &path) == 0);
1712 if ((type = is_grouping(path, &min, &max)) != NULL) {
1713 (void) fprintf(stderr, gettext("Cannot use "
1714 "'%s' as a device for splitting\n"), type);
1715 nvlist_free(newroot);
1721 if (zpool_vdev_split(zhp, newname, &newroot, props, flags) != 0) {
1722 nvlist_free(newroot);
1730 * Get and validate the contents of the given vdev specification. This ensures
1731 * that the nvlist returned is well-formed, that all the devices exist, and that
1732 * they are not currently in use by any other known consumer. The 'poolconfig'
1733 * parameter is the current configuration of the pool when adding devices
1734 * existing pool, and is used to perform additional checks, such as changing the
1735 * replication level of the pool. It can be 'NULL' to indicate that this is a
1736 * new pool. The 'force' flag controls whether devices should be forcefully
1737 * added, even if they appear in use.
1740 make_root_vdev(zpool_handle_t *zhp, nvlist_t *props, int force, int check_rep,
1741 boolean_t replacing, boolean_t dryrun, int argc, char **argv)
1744 nvlist_t *poolconfig = NULL;
1748 * Construct the vdev specification. If this is successful, we know
1749 * that we have a valid specification, and that all devices can be
1752 if ((newroot = construct_spec(props, argc, argv)) == NULL)
1755 if (zhp && ((poolconfig = zpool_get_config(zhp, NULL)) == NULL)) {
1756 nvlist_free(newroot);
1761 * Validate each device to make sure that its not shared with another
1762 * subsystem. We do this even if 'force' is set, because there are some
1763 * uses (such as a dedicated dump device) that even '-f' cannot
1766 if (is_device_in_use(poolconfig, newroot, force, replacing, B_FALSE)) {
1767 nvlist_free(newroot);
1772 * Check the replication level of the given vdevs and report any errors
1773 * found. We include the existing pool spec, if any, as we need to
1774 * catch changes against the existing replication level.
1776 if (check_rep && check_replication(poolconfig, newroot) != 0) {
1777 nvlist_free(newroot);
1782 * Run through the vdev specification and label any whole disks found.
1784 if (!dryrun && make_disks(zhp, newroot) != 0) {
1785 nvlist_free(newroot);