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mirror_zfs/cmd/zpool/zpool_vdev.c
Ryan Moeller 8498a2f3f8 Use signed types to prevent subtraction overflow 
The difference between the sizes could be positive or negative. Leaving
the types as unsigned means the result overflows when the difference is
negative and removing the labs() means we'll have introduced a bug. The
subtraction results in the correct value when the unsigned integer is
interpreted as a signed integer by labs().

Clang doesn't see that we're doing a subtraction and abusing the types.
It sees the result of the subtraction, an unsigned value, being passed
to an absolute value function and emits a warning which we treat as an
error.

Reviewed by: Youzhong Yang <youzhong@gmail.com>
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ryan Moeller <ryan@ixsystems.com>
Closes #9355
2020-01-22 13:49:01 -08:00

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013, 2018 by Delphix. All rights reserved.
* Copyright (c) 2016, 2017 Intel Corporation.
* Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>.
*/
/*
* Functions to convert between a list of vdevs and an nvlist representing the
* configuration. Each entry in the list can be one of:
*
* Device vdevs
* disk=(path=..., devid=...)
* file=(path=...)
*
* Group vdevs
* raidz[1|2]=(...)
* mirror=(...)
*
* Hot spares
*
* While the underlying implementation supports it, group vdevs cannot contain
* other group vdevs. All userland verification of devices is contained within
* this file. If successful, the nvlist returned can be passed directly to the
* kernel; we've done as much verification as possible in userland.
*
* Hot spares are a special case, and passed down as an array of disk vdevs, at
* the same level as the root of the vdev tree.
*
* The only function exported by this file is 'make_root_vdev'. The
* function performs several passes:
*
* 1. Construct the vdev specification. Performs syntax validation and
* makes sure each device is valid.
* 2. Check for devices in use. Using libblkid to make sure that no
* devices are also in use. Some can be overridden using the 'force'
* flag, others cannot.
* 3. Check for replication errors if the 'force' flag is not specified.
* validates that the replication level is consistent across the
* entire pool.
* 4. Call libzfs to label any whole disks with an EFI label.
*/
#include <assert.h>
#include <ctype.h>
#include <devid.h>
#include <errno.h>
#include <fcntl.h>
#include <libintl.h>
#include <libnvpair.h>
#include <libzutil.h>
#include <limits.h>
#include <sys/spa.h>
#include <scsi/scsi.h>
#include <scsi/sg.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/efi_partition.h>
#include <sys/stat.h>
#include <sys/vtoc.h>
#include <sys/mntent.h>
#include <uuid/uuid.h>
#include <blkid/blkid.h>
#include "zpool_util.h"
#include <sys/zfs_context.h>
/*
* For any given vdev specification, we can have multiple errors. The
* vdev_error() function keeps track of whether we have seen an error yet, and
* prints out a header if its the first error we've seen.
*/
boolean_t error_seen;
boolean_t is_force;
typedef struct vdev_disk_db_entry
{
char id[24];
int sector_size;
} vdev_disk_db_entry_t;
/*
* Database of block devices that lie about physical sector sizes. The
* identification string must be precisely 24 characters to avoid false
* negatives
*/
static vdev_disk_db_entry_t vdev_disk_database[] = {
{"ATA ADATA SSD S396 3", 8192},
{"ATA APPLE SSD SM128E", 8192},
{"ATA APPLE SSD SM256E", 8192},
{"ATA APPLE SSD SM512E", 8192},
{"ATA APPLE SSD SM768E", 8192},
{"ATA C400-MTFDDAC064M", 8192},
{"ATA C400-MTFDDAC128M", 8192},
{"ATA C400-MTFDDAC256M", 8192},
{"ATA C400-MTFDDAC512M", 8192},
{"ATA Corsair Force 3 ", 8192},
{"ATA Corsair Force GS", 8192},
{"ATA INTEL SSDSA2CT04", 8192},
{"ATA INTEL SSDSA2BZ10", 8192},
{"ATA INTEL SSDSA2BZ20", 8192},
{"ATA INTEL SSDSA2BZ30", 8192},
{"ATA INTEL SSDSA2CW04", 8192},
{"ATA INTEL SSDSA2CW08", 8192},
{"ATA INTEL SSDSA2CW12", 8192},
{"ATA INTEL SSDSA2CW16", 8192},
{"ATA INTEL SSDSA2CW30", 8192},
{"ATA INTEL SSDSA2CW60", 8192},
{"ATA INTEL SSDSC2CT06", 8192},
{"ATA INTEL SSDSC2CT12", 8192},
{"ATA INTEL SSDSC2CT18", 8192},
{"ATA INTEL SSDSC2CT24", 8192},
{"ATA INTEL SSDSC2CW06", 8192},
{"ATA INTEL SSDSC2CW12", 8192},
{"ATA INTEL SSDSC2CW18", 8192},
{"ATA INTEL SSDSC2CW24", 8192},
{"ATA INTEL SSDSC2CW48", 8192},
{"ATA KINGSTON SH100S3", 8192},
{"ATA KINGSTON SH103S3", 8192},
{"ATA M4-CT064M4SSD2 ", 8192},
{"ATA M4-CT128M4SSD2 ", 8192},
{"ATA M4-CT256M4SSD2 ", 8192},
{"ATA M4-CT512M4SSD2 ", 8192},
{"ATA OCZ-AGILITY2 ", 8192},
{"ATA OCZ-AGILITY3 ", 8192},
{"ATA OCZ-VERTEX2 3.5 ", 8192},
{"ATA OCZ-VERTEX3 ", 8192},
{"ATA OCZ-VERTEX3 LT ", 8192},
{"ATA OCZ-VERTEX3 MI ", 8192},
{"ATA OCZ-VERTEX4 ", 8192},
{"ATA SAMSUNG MZ7WD120", 8192},
{"ATA SAMSUNG MZ7WD240", 8192},
{"ATA SAMSUNG MZ7WD480", 8192},
{"ATA SAMSUNG MZ7WD960", 8192},
{"ATA SAMSUNG SSD 830 ", 8192},
{"ATA Samsung SSD 840 ", 8192},
{"ATA SanDisk SSD U100", 8192},
{"ATA TOSHIBA THNSNH06", 8192},
{"ATA TOSHIBA THNSNH12", 8192},
{"ATA TOSHIBA THNSNH25", 8192},
{"ATA TOSHIBA THNSNH51", 8192},
{"ATA APPLE SSD TS064C", 4096},
{"ATA APPLE SSD TS128C", 4096},
{"ATA APPLE SSD TS256C", 4096},
{"ATA APPLE SSD TS512C", 4096},
{"ATA INTEL SSDSA2M040", 4096},
{"ATA INTEL SSDSA2M080", 4096},
{"ATA INTEL SSDSA2M160", 4096},
{"ATA INTEL SSDSC2MH12", 4096},
{"ATA INTEL SSDSC2MH25", 4096},
{"ATA OCZ CORE_SSD ", 4096},
{"ATA OCZ-VERTEX ", 4096},
{"ATA SAMSUNG MCCOE32G", 4096},
{"ATA SAMSUNG MCCOE64G", 4096},
{"ATA SAMSUNG SSD PM80", 4096},
/* Flash drives optimized for 4KB IOs on larger pages */
{"ATA INTEL SSDSC2BA10", 4096},
{"ATA INTEL SSDSC2BA20", 4096},
{"ATA INTEL SSDSC2BA40", 4096},
{"ATA INTEL SSDSC2BA80", 4096},
{"ATA INTEL SSDSC2BB08", 4096},
{"ATA INTEL SSDSC2BB12", 4096},
{"ATA INTEL SSDSC2BB16", 4096},
{"ATA INTEL SSDSC2BB24", 4096},
{"ATA INTEL SSDSC2BB30", 4096},
{"ATA INTEL SSDSC2BB40", 4096},
{"ATA INTEL SSDSC2BB48", 4096},
{"ATA INTEL SSDSC2BB60", 4096},
{"ATA INTEL SSDSC2BB80", 4096},
{"ATA INTEL SSDSC2BW24", 4096},
{"ATA INTEL SSDSC2BW48", 4096},
{"ATA INTEL SSDSC2BP24", 4096},
{"ATA INTEL SSDSC2BP48", 4096},
{"NA SmrtStorSDLKAE9W", 4096},
{"NVMe Amazon EC2 NVMe ", 4096},
/* Imported from Open Solaris */
{"ATA MARVELL SD88SA02", 4096},
/* Advanced format Hard drives */
{"ATA Hitachi HDS5C303", 4096},
{"ATA SAMSUNG HD204UI ", 4096},
{"ATA ST2000DL004 HD20", 4096},
{"ATA WDC WD10EARS-00M", 4096},
{"ATA WDC WD10EARS-00S", 4096},
{"ATA WDC WD10EARS-00Z", 4096},
{"ATA WDC WD15EARS-00M", 4096},
{"ATA WDC WD15EARS-00S", 4096},
{"ATA WDC WD15EARS-00Z", 4096},
{"ATA WDC WD20EARS-00M", 4096},
{"ATA WDC WD20EARS-00S", 4096},
{"ATA WDC WD20EARS-00Z", 4096},
{"ATA WDC WD1600BEVT-0", 4096},
{"ATA WDC WD2500BEVT-0", 4096},
{"ATA WDC WD3200BEVT-0", 4096},
{"ATA WDC WD5000BEVT-0", 4096},
/* Virtual disks: Assume zvols with default volblocksize */
#if 0
{"ATA QEMU HARDDISK ", 8192},
{"IET VIRTUAL-DISK ", 8192},
{"OI COMSTAR ", 8192},
{"SUN COMSTAR ", 8192},
{"NETAPP LUN ", 8192},
#endif
};
static const int vdev_disk_database_size =
sizeof (vdev_disk_database) / sizeof (vdev_disk_database[0]);
#define INQ_REPLY_LEN 96
#define INQ_CMD_LEN 6
static boolean_t
check_sector_size_database(char *path, int *sector_size)
{
unsigned char inq_buff[INQ_REPLY_LEN];
unsigned char sense_buffer[32];
unsigned char inq_cmd_blk[INQ_CMD_LEN] =
{INQUIRY, 0, 0, 0, INQ_REPLY_LEN, 0};
sg_io_hdr_t io_hdr;
int error;
int fd;
int i;
/* Prepare INQUIRY command */
memset(&io_hdr, 0, sizeof (sg_io_hdr_t));
io_hdr.interface_id = 'S';
io_hdr.cmd_len = sizeof (inq_cmd_blk);
io_hdr.mx_sb_len = sizeof (sense_buffer);
io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
io_hdr.dxfer_len = INQ_REPLY_LEN;
io_hdr.dxferp = inq_buff;
io_hdr.cmdp = inq_cmd_blk;
io_hdr.sbp = sense_buffer;
io_hdr.timeout = 10; /* 10 milliseconds is ample time */
if ((fd = open(path, O_RDONLY|O_DIRECT)) < 0)
return (B_FALSE);
error = ioctl(fd, SG_IO, (unsigned long) &io_hdr);
(void) close(fd);
if (error < 0)
return (B_FALSE);
if ((io_hdr.info & SG_INFO_OK_MASK) != SG_INFO_OK)
return (B_FALSE);
for (i = 0; i < vdev_disk_database_size; i++) {
if (memcmp(inq_buff + 8, vdev_disk_database[i].id, 24))
continue;
*sector_size = vdev_disk_database[i].sector_size;
return (B_TRUE);
}
return (B_FALSE);
}
/*PRINTFLIKE1*/
static void
vdev_error(const char *fmt, ...)
{
va_list ap;
if (!error_seen) {
(void) fprintf(stderr, gettext("invalid vdev specification\n"));
if (!is_force)
(void) fprintf(stderr, gettext("use '-f' to override "
"the following errors:\n"));
else
(void) fprintf(stderr, gettext("the following errors "
"must be manually repaired:\n"));
error_seen = B_TRUE;
}
va_start(ap, fmt);
(void) vfprintf(stderr, fmt, ap);
va_end(ap);
}
/*
* Check that a file is valid. All we can do in this case is check that it's
* not in use by another pool, and not in use by swap.
*/
static int
check_file(const char *file, boolean_t force, boolean_t isspare)
{
char *name;
int fd;
int ret = 0;
pool_state_t state;
boolean_t inuse;
if ((fd = open(file, O_RDONLY)) < 0)
return (0);
if (zpool_in_use(g_zfs, fd, &state, &name, &inuse) == 0 && inuse) {
const char *desc;
switch (state) {
case POOL_STATE_ACTIVE:
desc = gettext("active");
break;
case POOL_STATE_EXPORTED:
desc = gettext("exported");
break;
case POOL_STATE_POTENTIALLY_ACTIVE:
desc = gettext("potentially active");
break;
default:
desc = gettext("unknown");
break;
}
/*
* Allow hot spares to be shared between pools.
*/
if (state == POOL_STATE_SPARE && isspare) {
free(name);
(void) close(fd);
return (0);
}
if (state == POOL_STATE_ACTIVE ||
state == POOL_STATE_SPARE || !force) {
switch (state) {
case POOL_STATE_SPARE:
vdev_error(gettext("%s is reserved as a hot "
"spare for pool %s\n"), file, name);
break;
default:
vdev_error(gettext("%s is part of %s pool "
"'%s'\n"), file, desc, name);
break;
}
ret = -1;
}
free(name);
}
(void) close(fd);
return (ret);
}
static int
check_slice(const char *path, blkid_cache cache, int force, boolean_t isspare)
{
int err;
char *value;
/* No valid type detected device is safe to use */
value = blkid_get_tag_value(cache, "TYPE", path);
if (value == NULL)
return (0);
/*
* If libblkid detects a ZFS device, we check the device
* using check_file() to see if it's safe. The one safe
* case is a spare device shared between multiple pools.
*/
if (strcmp(value, "zfs_member") == 0) {
err = check_file(path, force, isspare);
} else {
if (force) {
err = 0;
} else {
err = -1;
vdev_error(gettext("%s contains a filesystem of "
"type '%s'\n"), path, value);
}
}
free(value);
return (err);
}
/*
* Validate that a disk including all partitions are safe to use.
*
* For EFI labeled disks this can done relatively easily with the libefi
* library. The partition numbers are extracted from the label and used
* to generate the expected /dev/ paths. Each partition can then be
* checked for conflicts.
*
* For non-EFI labeled disks (MBR/EBR/etc) the same process is possible
* but due to the lack of a readily available libraries this scanning is
* not implemented. Instead only the device path as given is checked.
*/
static int
check_disk(const char *path, blkid_cache cache, int force,
boolean_t isspare, boolean_t iswholedisk)
{
struct dk_gpt *vtoc;
char slice_path[MAXPATHLEN];
int err = 0;
int fd, i;
int flags = O_RDONLY|O_DIRECT;
if (!iswholedisk)
return (check_slice(path, cache, force, isspare));
/* only spares can be shared, other devices require exclusive access */
if (!isspare)
flags |= O_EXCL;
if ((fd = open(path, flags)) < 0) {
char *value = blkid_get_tag_value(cache, "TYPE", path);
(void) fprintf(stderr, gettext("%s is in use and contains "
"a %s filesystem.\n"), path, value ? value : "unknown");
free(value);
return (-1);
}
/*
* Expected to fail for non-EFI labeled disks. Just check the device
* as given and do not attempt to detect and scan partitions.
*/
err = efi_alloc_and_read(fd, &vtoc);
if (err) {
(void) close(fd);
return (check_slice(path, cache, force, isspare));
}
/*
* The primary efi partition label is damaged however the secondary
* label at the end of the device is intact. Rather than use this
* label we should play it safe and treat this as a non efi device.
*/
if (vtoc->efi_flags & EFI_GPT_PRIMARY_CORRUPT) {
efi_free(vtoc);
(void) close(fd);
if (force) {
/* Partitions will now be created using the backup */
return (0);
} else {
vdev_error(gettext("%s contains a corrupt primary "
"EFI label.\n"), path);
return (-1);
}
}
for (i = 0; i < vtoc->efi_nparts; i++) {
if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED ||
uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_guid))
continue;
if (strncmp(path, UDISK_ROOT, strlen(UDISK_ROOT)) == 0)
(void) snprintf(slice_path, sizeof (slice_path),
"%s%s%d", path, "-part", i+1);
else
(void) snprintf(slice_path, sizeof (slice_path),
"%s%s%d", path, isdigit(path[strlen(path)-1]) ?
"p" : "", i+1);
err = check_slice(slice_path, cache, force, isspare);
if (err)
break;
}
efi_free(vtoc);
(void) close(fd);
return (err);
}
static int
check_device(const char *path, boolean_t force,
boolean_t isspare, boolean_t iswholedisk)
{
blkid_cache cache;
int error;
error = blkid_get_cache(&cache, NULL);
if (error != 0) {
(void) fprintf(stderr, gettext("unable to access the blkid "
"cache.\n"));
return (-1);
}
error = check_disk(path, cache, force, isspare, iswholedisk);
blkid_put_cache(cache);
return (error);
}
/*
* This may be a shorthand device path or it could be total gibberish.
* Check to see if it is a known device available in zfs_vdev_paths.
* As part of this check, see if we've been given an entire disk
* (minus the slice number).
*/
static int
is_shorthand_path(const char *arg, char *path, size_t path_size,
struct stat64 *statbuf, boolean_t *wholedisk)
{
int error;
error = zfs_resolve_shortname(arg, path, path_size);
if (error == 0) {
*wholedisk = zfs_dev_is_whole_disk(path);
if (*wholedisk || (stat64(path, statbuf) == 0))
return (0);
}
strlcpy(path, arg, path_size);
memset(statbuf, 0, sizeof (*statbuf));
*wholedisk = B_FALSE;
return (error);
}
/*
* Determine if the given path is a hot spare within the given configuration.
* If no configuration is given we rely solely on the label.
*/
static boolean_t
is_spare(nvlist_t *config, const char *path)
{
int fd;
pool_state_t state;
char *name = NULL;
nvlist_t *label;
uint64_t guid, spareguid;
nvlist_t *nvroot;
nvlist_t **spares;
uint_t i, nspares;
boolean_t inuse;
if ((fd = open(path, O_RDONLY|O_DIRECT)) < 0)
return (B_FALSE);
if (zpool_in_use(g_zfs, fd, &state, &name, &inuse) != 0 ||
!inuse ||
state != POOL_STATE_SPARE ||
zpool_read_label(fd, &label, NULL) != 0) {
free(name);
(void) close(fd);
return (B_FALSE);
}
free(name);
(void) close(fd);
if (config == NULL) {
nvlist_free(label);
return (B_TRUE);
}
verify(nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) == 0);
nvlist_free(label);
verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
&nvroot) == 0);
if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
&spares, &nspares) == 0) {
for (i = 0; i < nspares; i++) {
verify(nvlist_lookup_uint64(spares[i],
ZPOOL_CONFIG_GUID, &spareguid) == 0);
if (spareguid == guid)
return (B_TRUE);
}
}
return (B_FALSE);
}
/*
* Create a leaf vdev. Determine if this is a file or a device. If it's a
* device, fill in the device id to make a complete nvlist. Valid forms for a
* leaf vdev are:
*
* /dev/xxx Complete disk path
* /xxx Full path to file
* xxx Shorthand for <zfs_vdev_paths>/xxx
*/
static nvlist_t *
make_leaf_vdev(nvlist_t *props, const char *arg, uint64_t is_log)
{
char path[MAXPATHLEN];
struct stat64 statbuf;
nvlist_t *vdev = NULL;
char *type = NULL;
boolean_t wholedisk = B_FALSE;
uint64_t ashift = 0;
int err;
/*
* Determine what type of vdev this is, and put the full path into
* 'path'. We detect whether this is a device of file afterwards by
* checking the st_mode of the file.
*/
if (arg[0] == '/') {
/*
* Complete device or file path. Exact type is determined by
* examining the file descriptor afterwards. Symbolic links
* are resolved to their real paths to determine whole disk
* and S_ISBLK/S_ISREG type checks. However, we are careful
* to store the given path as ZPOOL_CONFIG_PATH to ensure we
* can leverage udev's persistent device labels.
*/
if (realpath(arg, path) == NULL) {
(void) fprintf(stderr,
gettext("cannot resolve path '%s'\n"), arg);
return (NULL);
}
wholedisk = zfs_dev_is_whole_disk(path);
if (!wholedisk && (stat64(path, &statbuf) != 0)) {
(void) fprintf(stderr,
gettext("cannot open '%s': %s\n"),
path, strerror(errno));
return (NULL);
}
/* After whole disk check restore original passed path */
strlcpy(path, arg, sizeof (path));
} else {
err = is_shorthand_path(arg, path, sizeof (path),
&statbuf, &wholedisk);
if (err != 0) {
/*
* If we got ENOENT, then the user gave us
* gibberish, so try to direct them with a
* reasonable error message. Otherwise,
* regurgitate strerror() since it's the best we
* can do.
*/
if (err == ENOENT) {
(void) fprintf(stderr,
gettext("cannot open '%s': no such "
"device in %s\n"), arg, DISK_ROOT);
(void) fprintf(stderr,
gettext("must be a full path or "
"shorthand device name\n"));
return (NULL);
} else {
(void) fprintf(stderr,
gettext("cannot open '%s': %s\n"),
path, strerror(errno));
return (NULL);
}
}
}
/*
* Determine whether this is a device or a file.
*/
if (wholedisk || S_ISBLK(statbuf.st_mode)) {
type = VDEV_TYPE_DISK;
} else if (S_ISREG(statbuf.st_mode)) {
type = VDEV_TYPE_FILE;
} else {
(void) fprintf(stderr, gettext("cannot use '%s': must be a "
"block device or regular file\n"), path);
return (NULL);
}
/*
* Finally, we have the complete device or file, and we know that it is
* acceptable to use. Construct the nvlist to describe this vdev. All
* vdevs have a 'path' element, and devices also have a 'devid' element.
*/
verify(nvlist_alloc(&vdev, NV_UNIQUE_NAME, 0) == 0);
verify(nvlist_add_string(vdev, ZPOOL_CONFIG_PATH, path) == 0);
verify(nvlist_add_string(vdev, ZPOOL_CONFIG_TYPE, type) == 0);
verify(nvlist_add_uint64(vdev, ZPOOL_CONFIG_IS_LOG, is_log) == 0);
if (is_log)
verify(nvlist_add_string(vdev, ZPOOL_CONFIG_ALLOCATION_BIAS,
VDEV_ALLOC_BIAS_LOG) == 0);
if (strcmp(type, VDEV_TYPE_DISK) == 0)
verify(nvlist_add_uint64(vdev, ZPOOL_CONFIG_WHOLE_DISK,
(uint64_t)wholedisk) == 0);
/*
* Override defaults if custom properties are provided.
*/
if (props != NULL) {
char *value = NULL;
if (nvlist_lookup_string(props,
zpool_prop_to_name(ZPOOL_PROP_ASHIFT), &value) == 0) {
if (zfs_nicestrtonum(NULL, value, &ashift) != 0) {
(void) fprintf(stderr,
gettext("ashift must be a number.\n"));
return (NULL);
}
if (ashift != 0 &&
(ashift < ASHIFT_MIN || ashift > ASHIFT_MAX)) {
(void) fprintf(stderr,
gettext("invalid 'ashift=%" PRIu64 "' "
"property: only values between %" PRId32 " "
"and %" PRId32 " are allowed.\n"),
ashift, ASHIFT_MIN, ASHIFT_MAX);
return (NULL);
}
}
}
/*
* If the device is known to incorrectly report its physical sector
* size explicitly provide the known correct value.
*/
if (ashift == 0) {
int sector_size;
if (check_sector_size_database(path, &sector_size) == B_TRUE)
ashift = highbit64(sector_size) - 1;
}
if (ashift > 0)
(void) nvlist_add_uint64(vdev, ZPOOL_CONFIG_ASHIFT, ashift);
return (vdev);
}
/*
* Go through and verify the replication level of the pool is consistent.
* Performs the following checks:
*
* For the new spec, verifies that devices in mirrors and raidz are the
* same size.
*
* If the current configuration already has inconsistent replication
* levels, ignore any other potential problems in the new spec.
*
* Otherwise, make sure that the current spec (if there is one) and the new
* spec have consistent replication levels.
*
* If there is no current spec (create), make sure new spec has at least
* one general purpose vdev.
*/
typedef struct replication_level {
char *zprl_type;
uint64_t zprl_children;
uint64_t zprl_parity;
} replication_level_t;
#define ZPOOL_FUZZ (16 * 1024 * 1024)
static boolean_t
is_raidz_mirror(replication_level_t *a, replication_level_t *b,
replication_level_t **raidz, replication_level_t **mirror)
{
if (strcmp(a->zprl_type, "raidz") == 0 &&
strcmp(b->zprl_type, "mirror") == 0) {
*raidz = a;
*mirror = b;
return (B_TRUE);
}
return (B_FALSE);
}
/*
* Given a list of toplevel vdevs, return the current replication level. If
* the config is inconsistent, then NULL is returned. If 'fatal' is set, then
* an error message will be displayed for each self-inconsistent vdev.
*/
static replication_level_t *
get_replication(nvlist_t *nvroot, boolean_t fatal)
{
nvlist_t **top;
uint_t t, toplevels;
nvlist_t **child;
uint_t c, children;
nvlist_t *nv;
char *type;
replication_level_t lastrep = {0};
replication_level_t rep;
replication_level_t *ret;
replication_level_t *raidz, *mirror;
boolean_t dontreport;
ret = safe_malloc(sizeof (replication_level_t));
verify(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
&top, &toplevels) == 0);
for (t = 0; t < toplevels; t++) {
uint64_t is_log = B_FALSE;
nv = top[t];
/*
* For separate logs we ignore the top level vdev replication
* constraints.
*/
(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &is_log);
if (is_log)
continue;
/* Ignore holes introduced by removing aux devices */
verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
if (strcmp(type, VDEV_TYPE_HOLE) == 0)
continue;
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
&child, &children) != 0) {
/*
* This is a 'file' or 'disk' vdev.
*/
rep.zprl_type = type;
rep.zprl_children = 1;
rep.zprl_parity = 0;
} else {
int64_t vdev_size;
/*
* This is a mirror or RAID-Z vdev. Go through and make
* sure the contents are all the same (files vs. disks),
* keeping track of the number of elements in the
* process.
*
* We also check that the size of each vdev (if it can
* be determined) is the same.
*/
rep.zprl_type = type;
rep.zprl_children = 0;
if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) {
verify(nvlist_lookup_uint64(nv,
ZPOOL_CONFIG_NPARITY,
&rep.zprl_parity) == 0);
assert(rep.zprl_parity != 0);
} else {
rep.zprl_parity = 0;
}
/*
* The 'dontreport' variable indicates that we've
* already reported an error for this spec, so don't
* bother doing it again.
*/
type = NULL;
dontreport = 0;
vdev_size = -1LL;
for (c = 0; c < children; c++) {
nvlist_t *cnv = child[c];
char *path;
struct stat64 statbuf;
int64_t size = -1LL;
char *childtype;
int fd, err;
rep.zprl_children++;
verify(nvlist_lookup_string(cnv,
ZPOOL_CONFIG_TYPE, &childtype) == 0);
/*
* If this is a replacing or spare vdev, then
* get the real first child of the vdev: do this
* in a loop because replacing and spare vdevs
* can be nested.
*/
while (strcmp(childtype,
VDEV_TYPE_REPLACING) == 0 ||
strcmp(childtype, VDEV_TYPE_SPARE) == 0) {
nvlist_t **rchild;
uint_t rchildren;
verify(nvlist_lookup_nvlist_array(cnv,
ZPOOL_CONFIG_CHILDREN, &rchild,
&rchildren) == 0);
assert(rchildren == 2);
cnv = rchild[0];
verify(nvlist_lookup_string(cnv,
ZPOOL_CONFIG_TYPE,
&childtype) == 0);
}
verify(nvlist_lookup_string(cnv,
ZPOOL_CONFIG_PATH, &path) == 0);
/*
* If we have a raidz/mirror that combines disks
* with files, report it as an error.
*/
if (!dontreport && type != NULL &&
strcmp(type, childtype) != 0) {
if (ret != NULL)
free(ret);
ret = NULL;
if (fatal)
vdev_error(gettext(
"mismatched replication "
"level: %s contains both "
"files and devices\n"),
rep.zprl_type);
else
return (NULL);
dontreport = B_TRUE;
}
/*
* According to stat(2), the value of 'st_size'
* is undefined for block devices and character
* devices. But there is no effective way to
* determine the real size in userland.
*
* Instead, we'll take advantage of an
* implementation detail of spec_size(). If the
* device is currently open, then we (should)
* return a valid size.
*
* If we still don't get a valid size (indicated
* by a size of 0 or MAXOFFSET_T), then ignore
* this device altogether.
*/
if ((fd = open(path, O_RDONLY)) >= 0) {
err = fstat64_blk(fd, &statbuf);
(void) close(fd);
} else {
err = stat64(path, &statbuf);
}
if (err != 0 ||
statbuf.st_size == 0 ||
statbuf.st_size == MAXOFFSET_T)
continue;
size = statbuf.st_size;
/*
* Also make sure that devices and
* slices have a consistent size. If
* they differ by a significant amount
* (~16MB) then report an error.
*/
if (!dontreport &&
(vdev_size != -1LL &&
(labs(size - vdev_size) >
ZPOOL_FUZZ))) {
if (ret != NULL)
free(ret);
ret = NULL;
if (fatal)
vdev_error(gettext(
"%s contains devices of "
"different sizes\n"),
rep.zprl_type);
else
return (NULL);
dontreport = B_TRUE;
}
type = childtype;
vdev_size = size;
}
}
/*
* At this point, we have the replication of the last toplevel
* vdev in 'rep'. Compare it to 'lastrep' to see if it is
* different.
*/
if (lastrep.zprl_type != NULL) {
if (is_raidz_mirror(&lastrep, &rep, &raidz, &mirror) ||
is_raidz_mirror(&rep, &lastrep, &raidz, &mirror)) {
/*
* Accepted raidz and mirror when they can
* handle the same number of disk failures.
*/
if (raidz->zprl_parity !=
mirror->zprl_children - 1) {
if (ret != NULL)
free(ret);
ret = NULL;
if (fatal)
vdev_error(gettext(
"mismatched replication "
"level: "
"%s and %s vdevs with "
"different redundancy, "
"%llu vs. %llu (%llu-way) "
"are present\n"),
raidz->zprl_type,
mirror->zprl_type,
raidz->zprl_parity,
mirror->zprl_children - 1,
mirror->zprl_children);
else
return (NULL);
}
} else if (strcmp(lastrep.zprl_type, rep.zprl_type) !=
0) {
if (ret != NULL)
free(ret);
ret = NULL;
if (fatal)
vdev_error(gettext(
"mismatched replication level: "
"both %s and %s vdevs are "
"present\n"),
lastrep.zprl_type, rep.zprl_type);
else
return (NULL);
} else if (lastrep.zprl_parity != rep.zprl_parity) {
if (ret)
free(ret);
ret = NULL;
if (fatal)
vdev_error(gettext(
"mismatched replication level: "
"both %llu and %llu device parity "
"%s vdevs are present\n"),
lastrep.zprl_parity,
rep.zprl_parity,
rep.zprl_type);
else
return (NULL);
} else if (lastrep.zprl_children != rep.zprl_children) {
if (ret)
free(ret);
ret = NULL;
if (fatal)
vdev_error(gettext(
"mismatched replication level: "
"both %llu-way and %llu-way %s "
"vdevs are present\n"),
lastrep.zprl_children,
rep.zprl_children,
rep.zprl_type);
else
return (NULL);
}
}
lastrep = rep;
}
if (ret != NULL)
*ret = rep;
return (ret);
}
/*
* Check the replication level of the vdev spec against the current pool. Calls
* get_replication() to make sure the new spec is self-consistent. If the pool
* has a consistent replication level, then we ignore any errors. Otherwise,
* report any difference between the two.
*/
static int
check_replication(nvlist_t *config, nvlist_t *newroot)
{
nvlist_t **child;
uint_t children;
replication_level_t *current = NULL, *new;
replication_level_t *raidz, *mirror;
int ret;
/*
* If we have a current pool configuration, check to see if it's
* self-consistent. If not, simply return success.
*/
if (config != NULL) {
nvlist_t *nvroot;
verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
&nvroot) == 0);
if ((current = get_replication(nvroot, B_FALSE)) == NULL)
return (0);
}
/*
* for spares there may be no children, and therefore no
* replication level to check
*/
if ((nvlist_lookup_nvlist_array(newroot, ZPOOL_CONFIG_CHILDREN,
&child, &children) != 0) || (children == 0)) {
free(current);
return (0);
}
/*
* If all we have is logs then there's no replication level to check.
*/
if (num_logs(newroot) == children) {
free(current);
return (0);
}
/*
* Get the replication level of the new vdev spec, reporting any
* inconsistencies found.
*/
if ((new = get_replication(newroot, B_TRUE)) == NULL) {
free(current);
return (-1);
}
/*
* Check to see if the new vdev spec matches the replication level of
* the current pool.
*/
ret = 0;
if (current != NULL) {
if (is_raidz_mirror(current, new, &raidz, &mirror) ||
is_raidz_mirror(new, current, &raidz, &mirror)) {
if (raidz->zprl_parity != mirror->zprl_children - 1) {
vdev_error(gettext(
"mismatched replication level: pool and "
"new vdev with different redundancy, %s "
"and %s vdevs, %llu vs. %llu (%llu-way)\n"),
raidz->zprl_type,
mirror->zprl_type,
raidz->zprl_parity,
mirror->zprl_children - 1,
mirror->zprl_children);
ret = -1;
}
} else if (strcmp(current->zprl_type, new->zprl_type) != 0) {
vdev_error(gettext(
"mismatched replication level: pool uses %s "
"and new vdev is %s\n"),
current->zprl_type, new->zprl_type);
ret = -1;
} else if (current->zprl_parity != new->zprl_parity) {
vdev_error(gettext(
"mismatched replication level: pool uses %llu "
"device parity and new vdev uses %llu\n"),
current->zprl_parity, new->zprl_parity);
ret = -1;
} else if (current->zprl_children != new->zprl_children) {
vdev_error(gettext(
"mismatched replication level: pool uses %llu-way "
"%s and new vdev uses %llu-way %s\n"),
current->zprl_children, current->zprl_type,
new->zprl_children, new->zprl_type);
ret = -1;
}
}
free(new);
if (current != NULL)
free(current);
return (ret);
}
static int
zero_label(char *path)
{
const int size = 4096;
char buf[size];
int err, fd;
if ((fd = open(path, O_WRONLY|O_EXCL)) < 0) {
(void) fprintf(stderr, gettext("cannot open '%s': %s\n"),
path, strerror(errno));
return (-1);
}
memset(buf, 0, size);
err = write(fd, buf, size);
(void) fdatasync(fd);
(void) close(fd);
if (err == -1) {
(void) fprintf(stderr, gettext("cannot zero first %d bytes "
"of '%s': %s\n"), size, path, strerror(errno));
return (-1);
}
if (err != size) {
(void) fprintf(stderr, gettext("could only zero %d/%d bytes "
"of '%s'\n"), err, size, path);
return (-1);
}
return (0);
}
/*
* Go through and find any whole disks in the vdev specification, labelling them
* as appropriate. When constructing the vdev spec, we were unable to open this
* device in order to provide a devid. Now that we have labelled the disk and
* know that slice 0 is valid, we can construct the devid now.
*
* If the disk was already labeled with an EFI label, we will have gotten the
* devid already (because we were able to open the whole disk). Otherwise, we
* need to get the devid after we label the disk.
*/
static int
make_disks(zpool_handle_t *zhp, nvlist_t *nv)
{
nvlist_t **child;
uint_t c, children;
char *type, *path;
char devpath[MAXPATHLEN];
char udevpath[MAXPATHLEN];
uint64_t wholedisk;
struct stat64 statbuf;
int is_exclusive = 0;
int fd;
int ret;
verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
&child, &children) != 0) {
if (strcmp(type, VDEV_TYPE_DISK) != 0)
return (0);
/*
* We have a disk device. If this is a whole disk write
* out the efi partition table, otherwise write zero's to
* the first 4k of the partition. This is to ensure that
* libblkid will not misidentify the partition due to a
* magic value left by the previous filesystem.
*/
verify(!nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path));
verify(!nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
&wholedisk));
if (!wholedisk) {
/*
* Update device id string for mpath nodes (Linux only)
*/
if (is_mpath_whole_disk(path))
update_vdev_config_dev_strs(nv);
if (!is_spare(NULL, path))
(void) zero_label(path);
return (0);
}
if (realpath(path, devpath) == NULL) {
ret = errno;
(void) fprintf(stderr,
gettext("cannot resolve path '%s'\n"), path);
return (ret);
}
/*
* Remove any previously existing symlink from a udev path to
* the device before labeling the disk. This ensures that
* only newly created links are used. Otherwise there is a
* window between when udev deletes and recreates the link
* during which access attempts will fail with ENOENT.
*/
strlcpy(udevpath, path, MAXPATHLEN);
(void) zfs_append_partition(udevpath, MAXPATHLEN);
fd = open(devpath, O_RDWR|O_EXCL);
if (fd == -1) {
if (errno == EBUSY)
is_exclusive = 1;
} else {
(void) close(fd);
}
/*
* If the partition exists, contains a valid spare label,
* and is opened exclusively there is no need to partition
* it. Hot spares have already been partitioned and are
* held open exclusively by the kernel as a safety measure.
*
* If the provided path is for a /dev/disk/ device its
* symbolic link will be removed, partition table created,
* and then block until udev creates the new link.
*/
if (!is_exclusive && !is_spare(NULL, udevpath)) {
char *devnode = strrchr(devpath, '/') + 1;
ret = strncmp(udevpath, UDISK_ROOT, strlen(UDISK_ROOT));
if (ret == 0) {
ret = lstat64(udevpath, &statbuf);
if (ret == 0 && S_ISLNK(statbuf.st_mode))
(void) unlink(udevpath);
}
/*
* When labeling a pool the raw device node name
* is provided as it appears under /dev/.
*/
if (zpool_label_disk(g_zfs, zhp, devnode) == -1)
return (-1);
/*
* Wait for udev to signal the device is available
* by the provided path.
*/
ret = zpool_label_disk_wait(udevpath, DISK_LABEL_WAIT);
if (ret) {
(void) fprintf(stderr,
gettext("missing link: %s was "
"partitioned but %s is missing\n"),
devnode, udevpath);
return (ret);
}
ret = zero_label(udevpath);
if (ret)
return (ret);
}
/*
* Update the path to refer to the partition. The presence of
* the 'whole_disk' field indicates to the CLI that we should
* chop off the partition number when displaying the device in
* future output.
*/
verify(nvlist_add_string(nv, ZPOOL_CONFIG_PATH, udevpath) == 0);
/*
* Update device id strings for whole disks (Linux only)
*/
update_vdev_config_dev_strs(nv);
return (0);
}
for (c = 0; c < children; c++)
if ((ret = make_disks(zhp, child[c])) != 0)
return (ret);
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
&child, &children) == 0)
for (c = 0; c < children; c++)
if ((ret = make_disks(zhp, child[c])) != 0)
return (ret);
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
&child, &children) == 0)
for (c = 0; c < children; c++)
if ((ret = make_disks(zhp, child[c])) != 0)
return (ret);
return (0);
}
/*
* Go through and find any devices that are in use. We rely on libdiskmgt for
* the majority of this task.
*/
static boolean_t
is_device_in_use(nvlist_t *config, nvlist_t *nv, boolean_t force,
boolean_t replacing, boolean_t isspare)
{
nvlist_t **child;
uint_t c, children;
char *type, *path;
int ret = 0;
char buf[MAXPATHLEN];
uint64_t wholedisk = B_FALSE;
boolean_t anyinuse = B_FALSE;
verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
&child, &children) != 0) {
verify(!nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path));
if (strcmp(type, VDEV_TYPE_DISK) == 0)
verify(!nvlist_lookup_uint64(nv,
ZPOOL_CONFIG_WHOLE_DISK, &wholedisk));
/*
* As a generic check, we look to see if this is a replace of a
* hot spare within the same pool. If so, we allow it
* regardless of what libblkid or zpool_in_use() says.
*/
if (replacing) {
(void) strlcpy(buf, path, sizeof (buf));
if (wholedisk) {
ret = zfs_append_partition(buf, sizeof (buf));
if (ret == -1)
return (-1);
}
if (is_spare(config, buf))
return (B_FALSE);
}
if (strcmp(type, VDEV_TYPE_DISK) == 0)
ret = check_device(path, force, isspare, wholedisk);
else if (strcmp(type, VDEV_TYPE_FILE) == 0)
ret = check_file(path, force, isspare);
return (ret != 0);
}
for (c = 0; c < children; c++)
if (is_device_in_use(config, child[c], force, replacing,
B_FALSE))
anyinuse = B_TRUE;
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
&child, &children) == 0)
for (c = 0; c < children; c++)
if (is_device_in_use(config, child[c], force, replacing,
B_TRUE))
anyinuse = B_TRUE;
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
&child, &children) == 0)
for (c = 0; c < children; c++)
if (is_device_in_use(config, child[c], force, replacing,
B_FALSE))
anyinuse = B_TRUE;
return (anyinuse);
}
static const char *
is_grouping(const char *type, int *mindev, int *maxdev)
{
if (strncmp(type, "raidz", 5) == 0) {
const char *p = type + 5;
char *end;
long nparity;
if (*p == '\0') {
nparity = 1;
} else if (*p == '0') {
return (NULL); /* no zero prefixes allowed */
} else {
errno = 0;
nparity = strtol(p, &end, 10);
if (errno != 0 || nparity < 1 || nparity >= 255 ||
*end != '\0')
return (NULL);
}
if (mindev != NULL)
*mindev = nparity + 1;
if (maxdev != NULL)
*maxdev = 255;
return (VDEV_TYPE_RAIDZ);
}
if (maxdev != NULL)
*maxdev = INT_MAX;
if (strcmp(type, "mirror") == 0) {
if (mindev != NULL)
*mindev = 2;
return (VDEV_TYPE_MIRROR);
}
if (strcmp(type, "spare") == 0) {
if (mindev != NULL)
*mindev = 1;
return (VDEV_TYPE_SPARE);
}
if (strcmp(type, "log") == 0) {
if (mindev != NULL)
*mindev = 1;
return (VDEV_TYPE_LOG);
}
if (strcmp(type, VDEV_ALLOC_BIAS_SPECIAL) == 0 ||
strcmp(type, VDEV_ALLOC_BIAS_DEDUP) == 0) {
if (mindev != NULL)
*mindev = 1;
return (type);
}
if (strcmp(type, "cache") == 0) {
if (mindev != NULL)
*mindev = 1;
return (VDEV_TYPE_L2CACHE);
}
return (NULL);
}
/*
* Construct a syntactically valid vdev specification,
* and ensure that all devices and files exist and can be opened.
* Note: we don't bother freeing anything in the error paths
* because the program is just going to exit anyway.
*/
nvlist_t *
construct_spec(nvlist_t *props, int argc, char **argv)
{
nvlist_t *nvroot, *nv, **top, **spares, **l2cache;
int t, toplevels, mindev, maxdev, nspares, nlogs, nl2cache;
const char *type;
uint64_t is_log, is_special, is_dedup;
boolean_t seen_logs;
top = NULL;
toplevels = 0;
spares = NULL;
l2cache = NULL;
nspares = 0;
nlogs = 0;
nl2cache = 0;
is_log = is_special = is_dedup = B_FALSE;
seen_logs = B_FALSE;
nvroot = NULL;
while (argc > 0) {
nv = NULL;
/*
* If it's a mirror or raidz, the subsequent arguments are
* its leaves -- until we encounter the next mirror or raidz.
*/
if ((type = is_grouping(argv[0], &mindev, &maxdev)) != NULL) {
nvlist_t **child = NULL;
int c, children = 0;
if (strcmp(type, VDEV_TYPE_SPARE) == 0) {
if (spares != NULL) {
(void) fprintf(stderr,
gettext("invalid vdev "
"specification: 'spare' can be "
"specified only once\n"));
goto spec_out;
}
is_log = is_special = is_dedup = B_FALSE;
}
if (strcmp(type, VDEV_TYPE_LOG) == 0) {
if (seen_logs) {
(void) fprintf(stderr,
gettext("invalid vdev "
"specification: 'log' can be "
"specified only once\n"));
goto spec_out;
}
seen_logs = B_TRUE;
is_log = B_TRUE;
is_special = B_FALSE;
is_dedup = B_FALSE;
argc--;
argv++;
/*
* A log is not a real grouping device.
* We just set is_log and continue.
*/
continue;
}
if (strcmp(type, VDEV_ALLOC_BIAS_SPECIAL) == 0) {
is_special = B_TRUE;
is_log = B_FALSE;
is_dedup = B_FALSE;
argc--;
argv++;
continue;
}
if (strcmp(type, VDEV_ALLOC_BIAS_DEDUP) == 0) {
is_dedup = B_TRUE;
is_log = B_FALSE;
is_special = B_FALSE;
argc--;
argv++;
continue;
}
if (strcmp(type, VDEV_TYPE_L2CACHE) == 0) {
if (l2cache != NULL) {
(void) fprintf(stderr,
gettext("invalid vdev "
"specification: 'cache' can be "
"specified only once\n"));
goto spec_out;
}
is_log = is_special = is_dedup = B_FALSE;
}
if (is_log || is_special || is_dedup) {
if (strcmp(type, VDEV_TYPE_MIRROR) != 0) {
(void) fprintf(stderr,
gettext("invalid vdev "
"specification: unsupported '%s' "
"device: %s\n"), is_log ? "log" :
"special", type);
goto spec_out;
}
nlogs++;
}
for (c = 1; c < argc; c++) {
if (is_grouping(argv[c], NULL, NULL) != NULL)
break;
children++;
child = realloc(child,
children * sizeof (nvlist_t *));
if (child == NULL)
zpool_no_memory();
if ((nv = make_leaf_vdev(props, argv[c],
B_FALSE)) == NULL) {
for (c = 0; c < children - 1; c++)
nvlist_free(child[c]);
free(child);
goto spec_out;
}
child[children - 1] = nv;
}
if (children < mindev) {
(void) fprintf(stderr, gettext("invalid vdev "
"specification: %s requires at least %d "
"devices\n"), argv[0], mindev);
for (c = 0; c < children; c++)
nvlist_free(child[c]);
free(child);
goto spec_out;
}
if (children > maxdev) {
(void) fprintf(stderr, gettext("invalid vdev "
"specification: %s supports no more than "
"%d devices\n"), argv[0], maxdev);
for (c = 0; c < children; c++)
nvlist_free(child[c]);
free(child);
goto spec_out;
}
argc -= c;
argv += c;
if (strcmp(type, VDEV_TYPE_SPARE) == 0) {
spares = child;
nspares = children;
continue;
} else if (strcmp(type, VDEV_TYPE_L2CACHE) == 0) {
l2cache = child;
nl2cache = children;
continue;
} else {
/* create a top-level vdev with children */
verify(nvlist_alloc(&nv, NV_UNIQUE_NAME,
0) == 0);
verify(nvlist_add_string(nv, ZPOOL_CONFIG_TYPE,
type) == 0);
verify(nvlist_add_uint64(nv,
ZPOOL_CONFIG_IS_LOG, is_log) == 0);
if (is_log)
verify(nvlist_add_string(nv,
ZPOOL_CONFIG_ALLOCATION_BIAS,
VDEV_ALLOC_BIAS_LOG) == 0);
if (is_special) {
verify(nvlist_add_string(nv,
ZPOOL_CONFIG_ALLOCATION_BIAS,
VDEV_ALLOC_BIAS_SPECIAL) == 0);
}
if (is_dedup) {
verify(nvlist_add_string(nv,
ZPOOL_CONFIG_ALLOCATION_BIAS,
VDEV_ALLOC_BIAS_DEDUP) == 0);
}
if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) {
verify(nvlist_add_uint64(nv,
ZPOOL_CONFIG_NPARITY,
mindev - 1) == 0);
}
verify(nvlist_add_nvlist_array(nv,
ZPOOL_CONFIG_CHILDREN, child,
children) == 0);
for (c = 0; c < children; c++)
nvlist_free(child[c]);
free(child);
}
} else {
/*
* We have a device. Pass off to make_leaf_vdev() to
* construct the appropriate nvlist describing the vdev.
*/
if ((nv = make_leaf_vdev(props, argv[0],
is_log)) == NULL)
goto spec_out;
if (is_log)
nlogs++;
if (is_special) {
verify(nvlist_add_string(nv,
ZPOOL_CONFIG_ALLOCATION_BIAS,
VDEV_ALLOC_BIAS_SPECIAL) == 0);
}
if (is_dedup) {
verify(nvlist_add_string(nv,
ZPOOL_CONFIG_ALLOCATION_BIAS,
VDEV_ALLOC_BIAS_DEDUP) == 0);
}
argc--;
argv++;
}
toplevels++;
top = realloc(top, toplevels * sizeof (nvlist_t *));
if (top == NULL)
zpool_no_memory();
top[toplevels - 1] = nv;
}
if (toplevels == 0 && nspares == 0 && nl2cache == 0) {
(void) fprintf(stderr, gettext("invalid vdev "
"specification: at least one toplevel vdev must be "
"specified\n"));
goto spec_out;
}
if (seen_logs && nlogs == 0) {
(void) fprintf(stderr, gettext("invalid vdev specification: "
"log requires at least 1 device\n"));
goto spec_out;
}
/*
* Finally, create nvroot and add all top-level vdevs to it.
*/
verify(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) == 0);
verify(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
VDEV_TYPE_ROOT) == 0);
verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
top, toplevels) == 0);
if (nspares != 0)
verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
spares, nspares) == 0);
if (nl2cache != 0)
verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
l2cache, nl2cache) == 0);
spec_out:
for (t = 0; t < toplevels; t++)
nvlist_free(top[t]);
for (t = 0; t < nspares; t++)
nvlist_free(spares[t]);
for (t = 0; t < nl2cache; t++)
nvlist_free(l2cache[t]);
free(spares);
free(l2cache);
free(top);
return (nvroot);
}
nvlist_t *
split_mirror_vdev(zpool_handle_t *zhp, char *newname, nvlist_t *props,
splitflags_t flags, int argc, char **argv)
{
nvlist_t *newroot = NULL, **child;
uint_t c, children;
if (argc > 0) {
if ((newroot = construct_spec(props, argc, argv)) == NULL) {
(void) fprintf(stderr, gettext("Unable to build a "
"pool from the specified devices\n"));
return (NULL);
}
if (!flags.dryrun && make_disks(zhp, newroot) != 0) {
nvlist_free(newroot);
return (NULL);
}
/* avoid any tricks in the spec */
verify(nvlist_lookup_nvlist_array(newroot,
ZPOOL_CONFIG_CHILDREN, &child, &children) == 0);
for (c = 0; c < children; c++) {
char *path;
const char *type;
int min, max;
verify(nvlist_lookup_string(child[c],
ZPOOL_CONFIG_PATH, &path) == 0);
if ((type = is_grouping(path, &min, &max)) != NULL) {
(void) fprintf(stderr, gettext("Cannot use "
"'%s' as a device for splitting\n"), type);
nvlist_free(newroot);
return (NULL);
}
}
}
if (zpool_vdev_split(zhp, newname, &newroot, props, flags) != 0) {
nvlist_free(newroot);
return (NULL);
}
return (newroot);
}
static int
num_normal_vdevs(nvlist_t *nvroot)
{
nvlist_t **top;
uint_t t, toplevels, normal = 0;
verify(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
&top, &toplevels) == 0);
for (t = 0; t < toplevels; t++) {
uint64_t log = B_FALSE;
(void) nvlist_lookup_uint64(top[t], ZPOOL_CONFIG_IS_LOG, &log);
if (log)
continue;
if (nvlist_exists(top[t], ZPOOL_CONFIG_ALLOCATION_BIAS))
continue;
normal++;
}
return (normal);
}
/*
* Get and validate the contents of the given vdev specification. This ensures
* that the nvlist returned is well-formed, that all the devices exist, and that
* they are not currently in use by any other known consumer. The 'poolconfig'
* parameter is the current configuration of the pool when adding devices
* existing pool, and is used to perform additional checks, such as changing the
* replication level of the pool. It can be 'NULL' to indicate that this is a
* new pool. The 'force' flag controls whether devices should be forcefully
* added, even if they appear in use.
*/
nvlist_t *
make_root_vdev(zpool_handle_t *zhp, nvlist_t *props, int force, int check_rep,
boolean_t replacing, boolean_t dryrun, int argc, char **argv)
{
nvlist_t *newroot;
nvlist_t *poolconfig = NULL;
is_force = force;
/*
* Construct the vdev specification. If this is successful, we know
* that we have a valid specification, and that all devices can be
* opened.
*/
if ((newroot = construct_spec(props, argc, argv)) == NULL)
return (NULL);
if (zhp && ((poolconfig = zpool_get_config(zhp, NULL)) == NULL)) {
nvlist_free(newroot);
return (NULL);
}
/*
* Validate each device to make sure that it's not shared with another
* subsystem. We do this even if 'force' is set, because there are some
* uses (such as a dedicated dump device) that even '-f' cannot
* override.
*/
if (is_device_in_use(poolconfig, newroot, force, replacing, B_FALSE)) {
nvlist_free(newroot);
return (NULL);
}
/*
* Check the replication level of the given vdevs and report any errors
* found. We include the existing pool spec, if any, as we need to
* catch changes against the existing replication level.
*/
if (check_rep && check_replication(poolconfig, newroot) != 0) {
nvlist_free(newroot);
return (NULL);
}
/*
* On pool create the new vdev spec must have one normal vdev.
*/
if (poolconfig == NULL && num_normal_vdevs(newroot) == 0) {
vdev_error(gettext("at least one general top-level vdev must "
"be specified\n"));
nvlist_free(newroot);
return (NULL);
}
/*
* Run through the vdev specification and label any whole disks found.
*/
if (!dryrun && make_disks(zhp, newroot) != 0) {
nvlist_free(newroot);
return (NULL);
}
return (newroot);
}
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