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.
27 * Functions to convert between a list of vdevs and an nvlist representing the
28 * configuration. Each entry in the list can be one of:
31 * disk=(path=..., devid=...)
40 * While the underlying implementation supports it, group vdevs cannot contain
41 * other group vdevs. All userland verification of devices is contained within
42 * this file. If successful, the nvlist returned can be passed directly to the
43 * kernel; we've done as much verification as possible in userland.
45 * Hot spares are a special case, and passed down as an array of disk vdevs, at
46 * the same level as the root of the vdev tree.
48 * The only function exported by this file is 'make_root_vdev'. The
49 * function performs several passes:
51 * 1. Construct the vdev specification. Performs syntax validation and
52 * makes sure each device is valid.
53 * 2. Check for devices in use. Using libblkid to make sure that no
54 * devices are also in use. Some can be overridden using the 'force'
55 * flag, others cannot.
56 * 3. Check for replication errors if the 'force' flag is not specified.
57 * validates that the replication level is consistent across the
59 * 4. Call libzfs to label any whole disks with an EFI label.
68 #include <libnvpair.h>
73 #include <sys/efi_partition.h>
76 #include <sys/mntent.h>
77 #include <uuid/uuid.h>
79 #include <blkid/blkid.h>
81 #define blkid_cache void *
82 #endif /* HAVE_LIBBLKID */
84 #include "zpool_util.h"
87 * For any given vdev specification, we can have multiple errors. The
88 * vdev_error() function keeps track of whether we have seen an error yet, and
89 * prints out a header if its the first error we've seen.
96 vdev_error(const char *fmt
, ...)
101 (void) fprintf(stderr
, gettext("invalid vdev specification\n"));
103 (void) fprintf(stderr
, gettext("use '-f' to override "
104 "the following errors:\n"));
106 (void) fprintf(stderr
, gettext("the following errors "
107 "must be manually repaired:\n"));
112 (void) vfprintf(stderr
, fmt
, ap
);
117 * Check that a file is valid. All we can do in this case is check that it's
118 * not in use by another pool, and not in use by swap.
121 check_file(const char *file
, boolean_t force
, boolean_t isspare
)
129 if ((fd
= open(file
, O_RDONLY
)) < 0)
132 if (zpool_in_use(g_zfs
, fd
, &state
, &name
, &inuse
) == 0 && inuse
) {
136 case POOL_STATE_ACTIVE
:
137 desc
= gettext("active");
140 case POOL_STATE_EXPORTED
:
141 desc
= gettext("exported");
144 case POOL_STATE_POTENTIALLY_ACTIVE
:
145 desc
= gettext("potentially active");
149 desc
= gettext("unknown");
154 * Allow hot spares to be shared between pools.
156 if (state
== POOL_STATE_SPARE
&& isspare
)
159 if (state
== POOL_STATE_ACTIVE
||
160 state
== POOL_STATE_SPARE
|| !force
) {
162 case POOL_STATE_SPARE
:
163 vdev_error(gettext("%s is reserved as a hot "
164 "spare for pool %s\n"), file
, name
);
167 vdev_error(gettext("%s is part of %s pool "
168 "'%s'\n"), file
, desc
, name
);
184 (void) fprintf(stderr
, gettext("warning: device in use checking "
185 "failed: %s\n"), strerror(err
));
189 check_slice(const char *path
, blkid_cache cache
, int force
, boolean_t isspare
)
191 struct stat64 statbuf
;
195 #endif /* HAVE_LIBBLKID */
197 if (stat64(path
, &statbuf
) != 0) {
198 vdev_error(gettext("cannot stat %s: %s\n"),
199 path
, strerror(errno
));
204 /* No valid type detected device is safe to use */
205 value
= blkid_get_tag_value(cache
, "TYPE", path
);
210 * If libblkid detects a ZFS device, we check the device
211 * using check_file() to see if it's safe. The one safe
212 * case is a spare device shared between multiple pools.
214 if (strcmp(value
, "zfs") == 0) {
215 err
= check_file(path
, force
, isspare
);
221 vdev_error(gettext("%s contains a filesystem of "
222 "type '%s'\n"), path
, value
);
228 err
= check_file(path
, force
, isspare
);
229 #endif /* HAVE_LIBBLKID */
235 * Validate a whole disk. Iterate over all slices on the disk and make sure
236 * that none is in use by calling check_slice().
239 check_disk(const char *path
, blkid_cache cache
, int force
,
240 boolean_t isspare
, boolean_t iswholedisk
)
243 char slice_path
[MAXPATHLEN
];
247 /* This is not a wholedisk we only check the given partition */
249 return check_slice(path
, cache
, force
, isspare
);
252 * When the device is a whole disk try to read the efi partition
253 * label. If this is successful we safely check the all of the
254 * partitions. However, when it fails it may simply be because
255 * the disk is partitioned via the MBR. Since we currently can
256 * not easily decode the MBR return a failure and prompt to the
257 * user to use force option since we cannot check the partitions.
259 if ((fd
= open(path
, O_RDWR
|O_DIRECT
|O_EXCL
)) < 0) {
264 if ((err
= efi_alloc_and_read(fd
, &vtoc
)) != 0) {
270 vdev_error(gettext("%s does not contain an EFI "
271 "label but it may contain partition\n"
272 "information in the MBR.\n"), path
);
278 * The primary efi partition label is damaged however the secondary
279 * label at the end of the device is intact. Rather than use this
280 * label we should play it safe and treat this as a non efi device.
282 if (vtoc
->efi_flags
& EFI_GPT_PRIMARY_CORRUPT
) {
287 /* Partitions will no be created using the backup */
290 vdev_error(gettext("%s contains a corrupt primary "
291 "EFI label.\n"), path
);
296 for (i
= 0; i
< vtoc
->efi_nparts
; i
++) {
298 if (vtoc
->efi_parts
[i
].p_tag
== V_UNASSIGNED
||
299 uuid_is_null((uchar_t
*)&vtoc
->efi_parts
[i
].p_guid
))
302 if (strncmp(path
, UDISK_ROOT
, strlen(UDISK_ROOT
)) == 0)
303 (void) snprintf(slice_path
, sizeof (slice_path
),
304 "%s%s%d", path
, "-part", i
+1);
306 (void) snprintf(slice_path
, sizeof (slice_path
),
307 "%s%s%d", path
, isdigit(path
[strlen(path
)-1]) ?
310 err
= check_slice(slice_path
, cache
, force
, isspare
);
322 check_device(const char *path
, boolean_t force
,
323 boolean_t isspare
, boolean_t iswholedisk
)
325 static blkid_cache cache
= NULL
;
329 * There is no easy way to add a correct blkid_put_cache() call,
330 * memory will be reclaimed when the command exits.
335 if ((err
= blkid_get_cache(&cache
, NULL
)) != 0) {
340 if ((err
= blkid_probe_all(cache
)) != 0) {
341 blkid_put_cache(cache
);
346 #endif /* HAVE_LIBBLKID */
348 return check_disk(path
, cache
, force
, isspare
, iswholedisk
);
352 * By "whole disk" we mean an entire physical disk (something we can
353 * label, toggle the write cache on, etc.) as opposed to the full
354 * capacity of a pseudo-device such as lofi or did. We act as if we
355 * are labeling the disk, which should be a pretty good test of whether
356 * it's a viable device or not. Returns B_TRUE if it is and B_FALSE if
360 is_whole_disk(const char *path
)
362 struct dk_gpt
*label
;
365 if ((fd
= open(path
, O_RDWR
|O_DIRECT
|O_EXCL
)) < 0)
367 if (efi_alloc_and_init(fd
, EFI_NUMPAR
, &label
) != 0) {
377 * This may be a shorthand device path or it could be total gibberish.
378 * Check to see if it's a known device in /dev/, /dev/disk/by-id,
379 * /dev/disk/by-label, /dev/disk/by-path, /dev/disk/by-uuid, or
380 * /dev/disk/zpool/. As part of this check, see if we've been given
381 * an entire disk (minus the slice number).
384 is_shorthand_path(const char *arg
, char *path
,
385 struct stat64
*statbuf
, boolean_t
*wholedisk
)
387 if (zfs_resolve_shortname(arg
, path
, MAXPATHLEN
) == 0) {
388 *wholedisk
= is_whole_disk(path
);
389 if (*wholedisk
|| (stat64(path
, statbuf
) == 0))
393 strlcpy(path
, arg
, sizeof(path
));
394 memset(statbuf
, 0, sizeof(*statbuf
));
395 *wholedisk
= B_FALSE
;
401 * Create a leaf vdev. Determine if this is a file or a device. If it's a
402 * device, fill in the device id to make a complete nvlist. Valid forms for a
405 * /dev/xxx Complete disk path
406 * /xxx Full path to file
407 * xxx Shorthand for /dev/disk/yyy/xxx
410 make_leaf_vdev(const char *arg
, uint64_t is_log
)
412 char path
[MAXPATHLEN
];
413 struct stat64 statbuf
;
414 nvlist_t
*vdev
= NULL
;
416 boolean_t wholedisk
= B_FALSE
;
420 * Determine what type of vdev this is, and put the full path into
421 * 'path'. We detect whether this is a device of file afterwards by
422 * checking the st_mode of the file.
426 * Complete device or file path. Exact type is determined by
427 * examining the file descriptor afterwards. Symbolic links
428 * are resolved to their real paths for the is_whole_disk()
429 * and S_ISBLK/S_ISREG type checks. However, we are careful
430 * to store the given path as ZPOOL_CONFIG_PATH to ensure we
431 * can leverage udev's persistent device labels.
433 if (realpath(arg
, path
) == NULL
) {
434 (void) fprintf(stderr
,
435 gettext("cannot resolve path '%s'\n"), arg
);
439 wholedisk
= is_whole_disk(path
);
440 if (!wholedisk
&& (stat64(path
, &statbuf
) != 0)) {
441 (void) fprintf(stderr
,
442 gettext("cannot open '%s': %s\n"),
443 path
, strerror(errno
));
447 /* After is_whole_disk() check restore original passed path */
448 strlcpy(path
, arg
, MAXPATHLEN
);
450 err
= is_shorthand_path(arg
, path
, &statbuf
, &wholedisk
);
453 * If we got ENOENT, then the user gave us
454 * gibberish, so try to direct them with a
455 * reasonable error message. Otherwise,
456 * regurgitate strerror() since it's the best we
460 (void) fprintf(stderr
,
461 gettext("cannot open '%s': no such "
462 "device in %s\n"), arg
, DISK_ROOT
);
463 (void) fprintf(stderr
,
464 gettext("must be a full path or "
465 "shorthand device name\n"));
468 (void) fprintf(stderr
,
469 gettext("cannot open '%s': %s\n"),
470 path
, strerror(errno
));
477 * Determine whether this is a device or a file.
479 if (wholedisk
|| S_ISBLK(statbuf
.st_mode
)) {
480 type
= VDEV_TYPE_DISK
;
481 } else if (S_ISREG(statbuf
.st_mode
)) {
482 type
= VDEV_TYPE_FILE
;
484 (void) fprintf(stderr
, gettext("cannot use '%s': must be a "
485 "block device or regular file\n"), path
);
490 * Finally, we have the complete device or file, and we know that it is
491 * acceptable to use. Construct the nvlist to describe this vdev. All
492 * vdevs have a 'path' element, and devices also have a 'devid' element.
494 verify(nvlist_alloc(&vdev
, NV_UNIQUE_NAME
, 0) == 0);
495 verify(nvlist_add_string(vdev
, ZPOOL_CONFIG_PATH
, path
) == 0);
496 verify(nvlist_add_string(vdev
, ZPOOL_CONFIG_TYPE
, type
) == 0);
497 verify(nvlist_add_uint64(vdev
, ZPOOL_CONFIG_IS_LOG
, is_log
) == 0);
498 if (strcmp(type
, VDEV_TYPE_DISK
) == 0)
499 verify(nvlist_add_uint64(vdev
, ZPOOL_CONFIG_WHOLE_DISK
,
500 (uint64_t)wholedisk
) == 0);
502 #if defined(__sun__) || defined(__sun)
504 * For a whole disk, defer getting its devid until after labeling it.
506 if (S_ISBLK(statbuf
.st_mode
) && !wholedisk
) {
508 * Get the devid for the device.
512 char *minor
= NULL
, *devid_str
= NULL
;
514 if ((fd
= open(path
, O_RDONLY
|O_EXCL
)) < 0) {
515 (void) fprintf(stderr
, gettext("cannot open '%s': "
516 "%s\n"), path
, strerror(errno
));
521 if (devid_get(fd
, &devid
) == 0) {
522 if (devid_get_minor_name(fd
, &minor
) == 0 &&
523 (devid_str
= devid_str_encode(devid
, minor
)) !=
525 verify(nvlist_add_string(vdev
,
526 ZPOOL_CONFIG_DEVID
, devid_str
) == 0);
528 if (devid_str
!= NULL
)
529 devid_str_free(devid_str
);
531 devid_str_free(minor
);
543 * Go through and verify the replication level of the pool is consistent.
544 * Performs the following checks:
546 * For the new spec, verifies that devices in mirrors and raidz are the
549 * If the current configuration already has inconsistent replication
550 * levels, ignore any other potential problems in the new spec.
552 * Otherwise, make sure that the current spec (if there is one) and the new
553 * spec have consistent replication levels.
555 typedef struct replication_level
{
557 uint64_t zprl_children
;
558 uint64_t zprl_parity
;
559 } replication_level_t
;
561 #define ZPOOL_FUZZ (16 * 1024 * 1024)
564 * Given a list of toplevel vdevs, return the current replication level. If
565 * the config is inconsistent, then NULL is returned. If 'fatal' is set, then
566 * an error message will be displayed for each self-inconsistent vdev.
568 static replication_level_t
*
569 get_replication(nvlist_t
*nvroot
, boolean_t fatal
)
577 replication_level_t lastrep
= { 0 }, rep
, *ret
;
578 boolean_t dontreport
;
580 ret
= safe_malloc(sizeof (replication_level_t
));
582 verify(nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
583 &top
, &toplevels
) == 0);
585 lastrep
.zprl_type
= NULL
;
586 for (t
= 0; t
< toplevels
; t
++) {
587 uint64_t is_log
= B_FALSE
;
592 * For separate logs we ignore the top level vdev replication
595 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_IS_LOG
, &is_log
);
599 verify(nvlist_lookup_string(nv
, ZPOOL_CONFIG_TYPE
,
601 if (nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
602 &child
, &children
) != 0) {
604 * This is a 'file' or 'disk' vdev.
606 rep
.zprl_type
= type
;
607 rep
.zprl_children
= 1;
613 * This is a mirror or RAID-Z vdev. Go through and make
614 * sure the contents are all the same (files vs. disks),
615 * keeping track of the number of elements in the
618 * We also check that the size of each vdev (if it can
619 * be determined) is the same.
621 rep
.zprl_type
= type
;
622 rep
.zprl_children
= 0;
624 if (strcmp(type
, VDEV_TYPE_RAIDZ
) == 0) {
625 verify(nvlist_lookup_uint64(nv
,
626 ZPOOL_CONFIG_NPARITY
,
627 &rep
.zprl_parity
) == 0);
628 assert(rep
.zprl_parity
!= 0);
634 * The 'dontreport' variable indicates that we've
635 * already reported an error for this spec, so don't
636 * bother doing it again.
641 for (c
= 0; c
< children
; c
++) {
642 nvlist_t
*cnv
= child
[c
];
644 struct stat64 statbuf
;
645 uint64_t size
= -1ULL;
651 verify(nvlist_lookup_string(cnv
,
652 ZPOOL_CONFIG_TYPE
, &childtype
) == 0);
655 * If this is a replacing or spare vdev, then
656 * get the real first child of the vdev.
658 if (strcmp(childtype
,
659 VDEV_TYPE_REPLACING
) == 0 ||
660 strcmp(childtype
, VDEV_TYPE_SPARE
) == 0) {
664 verify(nvlist_lookup_nvlist_array(cnv
,
665 ZPOOL_CONFIG_CHILDREN
, &rchild
,
667 assert(rchildren
== 2);
670 verify(nvlist_lookup_string(cnv
,
675 verify(nvlist_lookup_string(cnv
,
676 ZPOOL_CONFIG_PATH
, &path
) == 0);
679 * If we have a raidz/mirror that combines disks
680 * with files, report it as an error.
682 if (!dontreport
&& type
!= NULL
&&
683 strcmp(type
, childtype
) != 0) {
689 "mismatched replication "
690 "level: %s contains both "
691 "files and devices\n"),
699 * According to stat(2), the value of 'st_size'
700 * is undefined for block devices and character
701 * devices. But there is no effective way to
702 * determine the real size in userland.
704 * Instead, we'll take advantage of an
705 * implementation detail of spec_size(). If the
706 * device is currently open, then we (should)
707 * return a valid size.
709 * If we still don't get a valid size (indicated
710 * by a size of 0 or MAXOFFSET_T), then ignore
711 * this device altogether.
713 if ((fd
= open(path
, O_RDONLY
)) >= 0) {
714 err
= fstat64(fd
, &statbuf
);
717 err
= stat64(path
, &statbuf
);
721 statbuf
.st_size
== 0 ||
722 statbuf
.st_size
== MAXOFFSET_T
)
725 size
= statbuf
.st_size
;
728 * Also make sure that devices and
729 * slices have a consistent size. If
730 * they differ by a significant amount
731 * (~16MB) then report an error.
734 (vdev_size
!= -1ULL &&
735 (labs(size
- vdev_size
) >
742 "%s contains devices of "
743 "different sizes\n"),
756 * At this point, we have the replication of the last toplevel
757 * vdev in 'rep'. Compare it to 'lastrep' to see if its
760 if (lastrep
.zprl_type
!= NULL
) {
761 if (strcmp(lastrep
.zprl_type
, rep
.zprl_type
) != 0) {
767 "mismatched replication level: "
768 "both %s and %s vdevs are "
770 lastrep
.zprl_type
, rep
.zprl_type
);
773 } else if (lastrep
.zprl_parity
!= rep
.zprl_parity
) {
779 "mismatched replication level: "
780 "both %llu and %llu device parity "
781 "%s vdevs are present\n"),
787 } else if (lastrep
.zprl_children
!= rep
.zprl_children
) {
793 "mismatched replication level: "
794 "both %llu-way and %llu-way %s "
795 "vdevs are present\n"),
796 lastrep
.zprl_children
,
813 * Check the replication level of the vdev spec against the current pool. Calls
814 * get_replication() to make sure the new spec is self-consistent. If the pool
815 * has a consistent replication level, then we ignore any errors. Otherwise,
816 * report any difference between the two.
819 check_replication(nvlist_t
*config
, nvlist_t
*newroot
)
823 replication_level_t
*current
= NULL
, *new;
827 * If we have a current pool configuration, check to see if it's
828 * self-consistent. If not, simply return success.
830 if (config
!= NULL
) {
833 verify(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
835 if ((current
= get_replication(nvroot
, B_FALSE
)) == NULL
)
839 * for spares there may be no children, and therefore no
840 * replication level to check
842 if ((nvlist_lookup_nvlist_array(newroot
, ZPOOL_CONFIG_CHILDREN
,
843 &child
, &children
) != 0) || (children
== 0)) {
849 * If all we have is logs then there's no replication level to check.
851 if (num_logs(newroot
) == children
) {
857 * Get the replication level of the new vdev spec, reporting any
858 * inconsistencies found.
860 if ((new = get_replication(newroot
, B_TRUE
)) == NULL
) {
866 * Check to see if the new vdev spec matches the replication level of
870 if (current
!= NULL
) {
871 if (strcmp(current
->zprl_type
, new->zprl_type
) != 0) {
873 "mismatched replication level: pool uses %s "
874 "and new vdev is %s\n"),
875 current
->zprl_type
, new->zprl_type
);
877 } else if (current
->zprl_parity
!= new->zprl_parity
) {
879 "mismatched replication level: pool uses %llu "
880 "device parity and new vdev uses %llu\n"),
881 current
->zprl_parity
, new->zprl_parity
);
883 } else if (current
->zprl_children
!= new->zprl_children
) {
885 "mismatched replication level: pool uses %llu-way "
886 "%s and new vdev uses %llu-way %s\n"),
887 current
->zprl_children
, current
->zprl_type
,
888 new->zprl_children
, new->zprl_type
);
901 zero_label(char *path
)
903 const int size
= 4096;
907 if ((fd
= open(path
, O_WRONLY
|O_EXCL
)) < 0) {
908 (void) fprintf(stderr
, gettext("cannot open '%s': %s\n"),
909 path
, strerror(errno
));
913 memset(buf
, 0, size
);
914 err
= write(fd
, buf
, size
);
915 (void) fdatasync(fd
);
919 (void) fprintf(stderr
, gettext("cannot zero first %d bytes "
920 "of '%s': %s\n"), size
, path
, strerror(errno
));
925 (void) fprintf(stderr
, gettext("could only zero %d/%d bytes "
926 "of '%s'\n"), err
, size
, path
);
934 * Go through and find any whole disks in the vdev specification, labelling them
935 * as appropriate. When constructing the vdev spec, we were unable to open this
936 * device in order to provide a devid. Now that we have labelled the disk and
937 * know that slice 0 is valid, we can construct the devid now.
939 * If the disk was already labeled with an EFI label, we will have gotten the
940 * devid already (because we were able to open the whole disk). Otherwise, we
941 * need to get the devid after we label the disk.
944 make_disks(zpool_handle_t
*zhp
, nvlist_t
*nv
)
948 char *type
, *path
, *diskname
;
949 char buf
[MAXPATHLEN
];
953 verify(nvlist_lookup_string(nv
, ZPOOL_CONFIG_TYPE
, &type
) == 0);
955 if (nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
956 &child
, &children
) != 0) {
958 if (strcmp(type
, VDEV_TYPE_DISK
) != 0)
962 * We have a disk device. If this is a whole disk write
963 * out the efi partition table, otherwise write zero's to
964 * the first 4k of the partition. This is to ensure that
965 * libblkid will not misidentify the partition due to a
966 * magic value left by the previous filesystem.
968 verify(!nvlist_lookup_string(nv
, ZPOOL_CONFIG_PATH
, &path
));
969 verify(!nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_WHOLE_DISK
,
973 ret
= zero_label(path
);
977 if (realpath(path
, buf
) == NULL
) {
979 (void) fprintf(stderr
,
980 gettext("cannot resolve path '%s'\n"), path
);
984 diskname
= strrchr(buf
, '/');
985 assert(diskname
!= NULL
);
987 if (zpool_label_disk(g_zfs
, zhp
, diskname
) == -1)
991 * Now the we've labeled the disk and the partitions have
992 * been created. We still need to wait for udev to create
993 * the symlinks to those partitions. If we are accessing
994 * the devices via a udev disk path, /dev/disk, then wait
995 * for *-part# to be created. Otherwise just use the normal
996 * syntax for devices in /dev.
998 zfs_append_partition(path
, buf
, sizeof (buf
));
1000 if ((ret
= zpool_label_disk_wait(buf
, 1000)) != 0) {
1001 (void) fprintf(stderr
,
1002 gettext( "cannot resolve path '%s'\n"), buf
);
1007 * Update the path to refer to FIRST_SLICE. The presence of
1008 * the 'whole_disk' field indicates to the CLI that we should
1009 * chop off the slice number when displaying the device in
1012 verify(nvlist_add_string(nv
, ZPOOL_CONFIG_PATH
, buf
) == 0);
1014 /* Just in case this partition already existed. */
1015 (void) zero_label(buf
);
1020 for (c
= 0; c
< children
; c
++)
1021 if ((ret
= make_disks(zhp
, child
[c
])) != 0)
1024 if (nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_SPARES
,
1025 &child
, &children
) == 0)
1026 for (c
= 0; c
< children
; c
++)
1027 if ((ret
= make_disks(zhp
, child
[c
])) != 0)
1030 if (nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_L2CACHE
,
1031 &child
, &children
) == 0)
1032 for (c
= 0; c
< children
; c
++)
1033 if ((ret
= make_disks(zhp
, child
[c
])) != 0)
1040 * Determine if the given path is a hot spare within the given configuration.
1043 is_spare(nvlist_t
*config
, const char *path
)
1049 uint64_t guid
, spareguid
;
1055 if ((fd
= open(path
, O_RDONLY
|O_EXCL
)) < 0)
1058 if (zpool_in_use(g_zfs
, fd
, &state
, &name
, &inuse
) != 0 ||
1060 state
!= POOL_STATE_SPARE
||
1061 zpool_read_label(fd
, &label
) != 0) {
1069 verify(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_GUID
, &guid
) == 0);
1072 verify(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
1074 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
1075 &spares
, &nspares
) == 0) {
1076 for (i
= 0; i
< nspares
; i
++) {
1077 verify(nvlist_lookup_uint64(spares
[i
],
1078 ZPOOL_CONFIG_GUID
, &spareguid
) == 0);
1079 if (spareguid
== guid
)
1088 * Go through and find any devices that are in use. We rely on libdiskmgt for
1089 * the majority of this task.
1092 check_in_use(nvlist_t
*config
, nvlist_t
*nv
, boolean_t force
,
1093 boolean_t replacing
, boolean_t isspare
)
1099 char buf
[MAXPATHLEN
];
1100 uint64_t wholedisk
= B_FALSE
;
1102 verify(nvlist_lookup_string(nv
, ZPOOL_CONFIG_TYPE
, &type
) == 0);
1104 if (nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
1105 &child
, &children
) != 0) {
1107 verify(!nvlist_lookup_string(nv
, ZPOOL_CONFIG_PATH
, &path
));
1108 if (strcmp(type
, VDEV_TYPE_DISK
) == 0)
1109 verify(!nvlist_lookup_uint64(nv
,
1110 ZPOOL_CONFIG_WHOLE_DISK
, &wholedisk
));
1113 * As a generic check, we look to see if this is a replace of a
1114 * hot spare within the same pool. If so, we allow it
1115 * regardless of what libblkid or zpool_in_use() says.
1119 (void) snprintf(buf
, sizeof (buf
), "%ss0",
1122 (void) strlcpy(buf
, path
, sizeof (buf
));
1124 if (is_spare(config
, buf
))
1128 if (strcmp(type
, VDEV_TYPE_DISK
) == 0)
1129 ret
= check_device(path
, force
, isspare
, wholedisk
);
1131 if (strcmp(type
, VDEV_TYPE_FILE
) == 0)
1132 ret
= check_file(path
, force
, isspare
);
1137 for (c
= 0; c
< children
; c
++)
1138 if ((ret
= check_in_use(config
, child
[c
], force
,
1139 replacing
, B_FALSE
)) != 0)
1142 if (nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_SPARES
,
1143 &child
, &children
) == 0)
1144 for (c
= 0; c
< children
; c
++)
1145 if ((ret
= check_in_use(config
, child
[c
], force
,
1146 replacing
, B_TRUE
)) != 0)
1149 if (nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_L2CACHE
,
1150 &child
, &children
) == 0)
1151 for (c
= 0; c
< children
; c
++)
1152 if ((ret
= check_in_use(config
, child
[c
], force
,
1153 replacing
, B_FALSE
)) != 0)
1160 is_grouping(const char *type
, int *mindev
, int *maxdev
)
1162 if (strncmp(type
, "raidz", 5) == 0) {
1163 const char *p
= type
+ 5;
1169 } else if (*p
== '0') {
1170 return (NULL
); /* no zero prefixes allowed */
1173 nparity
= strtol(p
, &end
, 10);
1174 if (errno
!= 0 || nparity
< 1 || nparity
>= 255 ||
1180 *mindev
= nparity
+ 1;
1183 return (VDEV_TYPE_RAIDZ
);
1189 if (strcmp(type
, "mirror") == 0) {
1192 return (VDEV_TYPE_MIRROR
);
1195 if (strcmp(type
, "spare") == 0) {
1198 return (VDEV_TYPE_SPARE
);
1201 if (strcmp(type
, "log") == 0) {
1204 return (VDEV_TYPE_LOG
);
1207 if (strcmp(type
, "cache") == 0) {
1210 return (VDEV_TYPE_L2CACHE
);
1217 * Construct a syntactically valid vdev specification,
1218 * and ensure that all devices and files exist and can be opened.
1219 * Note: we don't bother freeing anything in the error paths
1220 * because the program is just going to exit anyway.
1223 construct_spec(int argc
, char **argv
)
1225 nvlist_t
*nvroot
, *nv
, **top
, **spares
, **l2cache
;
1226 int t
, toplevels
, mindev
, maxdev
, nspares
, nlogs
, nl2cache
;
1229 boolean_t seen_logs
;
1239 seen_logs
= B_FALSE
;
1245 * If it's a mirror or raidz, the subsequent arguments are
1246 * its leaves -- until we encounter the next mirror or raidz.
1248 if ((type
= is_grouping(argv
[0], &mindev
, &maxdev
)) != NULL
) {
1249 nvlist_t
**child
= NULL
;
1250 int c
, children
= 0;
1252 if (strcmp(type
, VDEV_TYPE_SPARE
) == 0) {
1253 if (spares
!= NULL
) {
1254 (void) fprintf(stderr
,
1255 gettext("invalid vdev "
1256 "specification: 'spare' can be "
1257 "specified only once\n"));
1263 if (strcmp(type
, VDEV_TYPE_LOG
) == 0) {
1265 (void) fprintf(stderr
,
1266 gettext("invalid vdev "
1267 "specification: 'log' can be "
1268 "specified only once\n"));
1276 * A log is not a real grouping device.
1277 * We just set is_log and continue.
1282 if (strcmp(type
, VDEV_TYPE_L2CACHE
) == 0) {
1283 if (l2cache
!= NULL
) {
1284 (void) fprintf(stderr
,
1285 gettext("invalid vdev "
1286 "specification: 'cache' can be "
1287 "specified only once\n"));
1294 if (strcmp(type
, VDEV_TYPE_MIRROR
) != 0) {
1295 (void) fprintf(stderr
,
1296 gettext("invalid vdev "
1297 "specification: unsupported 'log' "
1298 "device: %s\n"), type
);
1304 for (c
= 1; c
< argc
; c
++) {
1305 if (is_grouping(argv
[c
], NULL
, NULL
) != NULL
)
1308 child
= realloc(child
,
1309 children
* sizeof (nvlist_t
*));
1312 if ((nv
= make_leaf_vdev(argv
[c
], B_FALSE
))
1315 child
[children
- 1] = nv
;
1318 if (children
< mindev
) {
1319 (void) fprintf(stderr
, gettext("invalid vdev "
1320 "specification: %s requires at least %d "
1321 "devices\n"), argv
[0], mindev
);
1325 if (children
> maxdev
) {
1326 (void) fprintf(stderr
, gettext("invalid vdev "
1327 "specification: %s supports no more than "
1328 "%d devices\n"), argv
[0], maxdev
);
1335 if (strcmp(type
, VDEV_TYPE_SPARE
) == 0) {
1339 } else if (strcmp(type
, VDEV_TYPE_L2CACHE
) == 0) {
1341 nl2cache
= children
;
1344 verify(nvlist_alloc(&nv
, NV_UNIQUE_NAME
,
1346 verify(nvlist_add_string(nv
, ZPOOL_CONFIG_TYPE
,
1348 verify(nvlist_add_uint64(nv
,
1349 ZPOOL_CONFIG_IS_LOG
, is_log
) == 0);
1350 if (strcmp(type
, VDEV_TYPE_RAIDZ
) == 0) {
1351 verify(nvlist_add_uint64(nv
,
1352 ZPOOL_CONFIG_NPARITY
,
1355 verify(nvlist_add_nvlist_array(nv
,
1356 ZPOOL_CONFIG_CHILDREN
, child
,
1359 for (c
= 0; c
< children
; c
++)
1360 nvlist_free(child
[c
]);
1365 * We have a device. Pass off to make_leaf_vdev() to
1366 * construct the appropriate nvlist describing the vdev.
1368 if ((nv
= make_leaf_vdev(argv
[0], is_log
)) == NULL
)
1377 top
= realloc(top
, toplevels
* sizeof (nvlist_t
*));
1380 top
[toplevels
- 1] = nv
;
1383 if (toplevels
== 0 && nspares
== 0 && nl2cache
== 0) {
1384 (void) fprintf(stderr
, gettext("invalid vdev "
1385 "specification: at least one toplevel vdev must be "
1390 if (seen_logs
&& nlogs
== 0) {
1391 (void) fprintf(stderr
, gettext("invalid vdev specification: "
1392 "log requires at least 1 device\n"));
1397 * Finally, create nvroot and add all top-level vdevs to it.
1399 verify(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, 0) == 0);
1400 verify(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
1401 VDEV_TYPE_ROOT
) == 0);
1402 verify(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
1403 top
, toplevels
) == 0);
1405 verify(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
1406 spares
, nspares
) == 0);
1408 verify(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
1409 l2cache
, nl2cache
) == 0);
1411 for (t
= 0; t
< toplevels
; t
++)
1412 nvlist_free(top
[t
]);
1413 for (t
= 0; t
< nspares
; t
++)
1414 nvlist_free(spares
[t
]);
1415 for (t
= 0; t
< nl2cache
; t
++)
1416 nvlist_free(l2cache
[t
]);
1427 split_mirror_vdev(zpool_handle_t
*zhp
, char *newname
, nvlist_t
*props
,
1428 splitflags_t flags
, int argc
, char **argv
)
1430 nvlist_t
*newroot
= NULL
, **child
;
1434 if ((newroot
= construct_spec(argc
, argv
)) == NULL
) {
1435 (void) fprintf(stderr
, gettext("Unable to build a "
1436 "pool from the specified devices\n"));
1440 if (!flags
.dryrun
&& make_disks(zhp
, newroot
) != 0) {
1441 nvlist_free(newroot
);
1445 /* avoid any tricks in the spec */
1446 verify(nvlist_lookup_nvlist_array(newroot
,
1447 ZPOOL_CONFIG_CHILDREN
, &child
, &children
) == 0);
1448 for (c
= 0; c
< children
; c
++) {
1453 verify(nvlist_lookup_string(child
[c
],
1454 ZPOOL_CONFIG_PATH
, &path
) == 0);
1455 if ((type
= is_grouping(path
, &min
, &max
)) != NULL
) {
1456 (void) fprintf(stderr
, gettext("Cannot use "
1457 "'%s' as a device for splitting\n"), type
);
1458 nvlist_free(newroot
);
1464 if (zpool_vdev_split(zhp
, newname
, &newroot
, props
, flags
) != 0) {
1465 if (newroot
!= NULL
)
1466 nvlist_free(newroot
);
1474 * Get and validate the contents of the given vdev specification. This ensures
1475 * that the nvlist returned is well-formed, that all the devices exist, and that
1476 * they are not currently in use by any other known consumer. The 'poolconfig'
1477 * parameter is the current configuration of the pool when adding devices
1478 * existing pool, and is used to perform additional checks, such as changing the
1479 * replication level of the pool. It can be 'NULL' to indicate that this is a
1480 * new pool. The 'force' flag controls whether devices should be forcefully
1481 * added, even if they appear in use.
1484 make_root_vdev(zpool_handle_t
*zhp
, int force
, int check_rep
,
1485 boolean_t replacing
, boolean_t dryrun
, int argc
, char **argv
)
1488 nvlist_t
*poolconfig
= NULL
;
1492 * Construct the vdev specification. If this is successful, we know
1493 * that we have a valid specification, and that all devices can be
1496 if ((newroot
= construct_spec(argc
, argv
)) == NULL
)
1499 if (zhp
&& ((poolconfig
= zpool_get_config(zhp
, NULL
)) == NULL
))
1503 * Validate each device to make sure that its not shared with another
1504 * subsystem. We do this even if 'force' is set, because there are some
1505 * uses (such as a dedicated dump device) that even '-f' cannot
1508 if (check_in_use(poolconfig
, newroot
, force
, replacing
, B_FALSE
) != 0) {
1509 nvlist_free(newroot
);
1514 * Check the replication level of the given vdevs and report any errors
1515 * found. We include the existing pool spec, if any, as we need to
1516 * catch changes against the existing replication level.
1518 if (check_rep
&& check_replication(poolconfig
, newroot
) != 0) {
1519 nvlist_free(newroot
);
1524 * Run through the vdev specification and label any whole disks found.
1526 if (!dryrun
&& make_disks(zhp
, newroot
) != 0) {
1527 nvlist_free(newroot
);