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lvm2/tools/lvresize.c
Zdenek Kabelac b90450b8a0 cleanup: introduce return_ECMD_FAILED macro 
Use shortening macro for common code sequence
stack;
return ECMD_FAILED;
2013-07-01 23:10:33 +02:00

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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2013 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tools.h"
#define SIZE_BUF 128
struct lvresize_params {
const char *vg_name;
const char *lv_name;
uint32_t stripes;
uint32_t stripe_size;
uint32_t mirrors;
const struct segment_type *segtype;
/* size */
uint32_t extents;
uint64_t size;
int sizeargs;
sign_t sign;
uint64_t poolmetadatasize;
sign_t poolmetadatasign;
percent_type_t percent;
enum {
LV_ANY = 0,
LV_REDUCE = 1,
LV_EXTEND = 2
} resize;
int resizefs;
int nofsck;
int argc;
char **argv;
};
static int _validate_stripesize(struct cmd_context *cmd,
const struct volume_group *vg,
struct lvresize_params *lp)
{
if (arg_sign_value(cmd, stripesize_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Stripesize may not be negative.");
return 0;
}
if (arg_uint64_value(cmd, stripesize_ARG, 0) > STRIPE_SIZE_LIMIT * 2) {
log_error("Stripe size cannot be larger than %s",
display_size(cmd, (uint64_t) STRIPE_SIZE_LIMIT));
return 0;
}
if (!(vg->fid->fmt->features & FMT_SEGMENTS))
log_warn("Varied stripesize not supported. Ignoring.");
else if (arg_uint_value(cmd, stripesize_ARG, 0) > (uint64_t) vg->extent_size * 2) {
log_error("Reducing stripe size %s to maximum, "
"physical extent size %s",
display_size(cmd,
(uint64_t) arg_uint_value(cmd, stripesize_ARG, 0)),
display_size(cmd, (uint64_t) vg->extent_size));
lp->stripe_size = vg->extent_size;
} else
lp->stripe_size = arg_uint_value(cmd, stripesize_ARG, 0);
if (lp->stripe_size & (lp->stripe_size - 1)) {
log_error("Stripe size must be power of 2");
return 0;
}
return 1;
}
static int _request_confirmation(struct cmd_context *cmd,
const struct volume_group *vg,
const struct logical_volume *lv,
const struct lvresize_params *lp)
{
struct lvinfo info = { 0 };
if (!lv_info(cmd, lv, 0, &info, 1, 0) && driver_version(NULL, 0)) {
log_error("lv_info failed: aborting");
return 0;
}
if (lp->resizefs) {
if (!info.exists) {
log_error("Logical volume %s must be activated "
"before resizing filesystem", lp->lv_name);
return 0;
}
return 1;
}
if (!info.exists)
return 1;
log_warn("WARNING: Reducing active%s logical volume to %s",
info.open_count ? " and open" : "",
display_size(cmd, (uint64_t) lp->extents * vg->extent_size));
log_warn("THIS MAY DESTROY YOUR DATA (filesystem etc.)");
if (!arg_count(cmd, force_ARG)) {
if (yes_no_prompt("Do you really want to reduce %s? [y/n]: ",
lp->lv_name) == 'n') {
log_error("Logical volume %s NOT reduced", lp->lv_name);
return 0;
}
if (sigint_caught())
return 0;
}
return 1;
}
enum fsadm_cmd_e { FSADM_CMD_CHECK, FSADM_CMD_RESIZE };
#define FSADM_CMD "fsadm"
#define FSADM_CMD_MAX_ARGS 6
#define FSADM_CHECK_FAILS_FOR_MOUNTED 3 /* shell exist status code */
/*
* FSADM_CMD --dry-run --verbose --force check lv_path
* FSADM_CMD --dry-run --verbose --force resize lv_path size
*/
static int _fsadm_cmd(struct cmd_context *cmd,
const struct volume_group *vg,
const struct lvresize_params *lp,
enum fsadm_cmd_e fcmd,
int *status)
{
char lv_path[PATH_MAX];
char size_buf[SIZE_BUF];
const char *argv[FSADM_CMD_MAX_ARGS + 2];
unsigned i = 0;
argv[i++] = FSADM_CMD;
if (test_mode())
argv[i++] = "--dry-run";
if (verbose_level() >= _LOG_NOTICE)
argv[i++] = "--verbose";
if (arg_count(cmd, force_ARG))
argv[i++] = "--force";
argv[i++] = (fcmd == FSADM_CMD_RESIZE) ? "resize" : "check";
if (status)
*status = -1;
if (dm_snprintf(lv_path, PATH_MAX, "%s%s/%s", cmd->dev_dir, lp->vg_name,
lp->lv_name) < 0) {
log_error("Couldn't create LV path for %s", lp->lv_name);
return 0;
}
argv[i++] = lv_path;
if (fcmd == FSADM_CMD_RESIZE) {
if (dm_snprintf(size_buf, SIZE_BUF, "%" PRIu64 "K",
(uint64_t) lp->extents * vg->extent_size / 2) < 0) {
log_error("Couldn't generate new LV size string");
return 0;
}
argv[i++] = size_buf;
}
argv[i] = NULL;
return exec_cmd(cmd, argv, status, 1);
}
static int _lvresize_params(struct cmd_context *cmd, int argc, char **argv,
struct lvresize_params *lp)
{
const char *cmd_name;
char *st;
unsigned dev_dir_found = 0;
int use_policy = arg_count(cmd, use_policies_ARG);
lp->sign = SIGN_NONE;
lp->poolmetadatasign = SIGN_NONE;
lp->resize = LV_ANY;
cmd_name = command_name(cmd);
if (!strcmp(cmd_name, "lvreduce"))
lp->resize = LV_REDUCE;
if (!strcmp(cmd_name, "lvextend"))
lp->resize = LV_EXTEND;
if (use_policy) {
/* do nothing; _lvresize will handle --use-policies itself */
lp->extents = 0;
lp->sign = SIGN_PLUS;
lp->percent = PERCENT_LV;
} else {
/*
* Allow omission of extents and size if the user has given us
* one or more PVs. Most likely, the intent was "resize this
* LV the best you can with these PVs"
* If only --poolmetadatasize is specified with list of PVs,
* then metadata will be extended there.
*/
lp->sizeargs = arg_count(cmd, extents_ARG) + arg_count(cmd, size_ARG);
if ((lp->sizeargs == 0) && (argc >= 2)) {
lp->extents = 100;
lp->percent = PERCENT_PVS;
lp->sign = SIGN_PLUS;
lp->sizeargs = !lp->poolmetadatasize ? 1 : 0;
} else if ((lp->sizeargs != 1) &&
((lp->sizeargs == 2) ||
!arg_count(cmd, poolmetadatasize_ARG))) {
log_error("Please specify either size or extents but not "
"both.");
return 0;
}
if (arg_count(cmd, extents_ARG)) {
lp->extents = arg_uint_value(cmd, extents_ARG, 0);
lp->sign = arg_sign_value(cmd, extents_ARG, SIGN_NONE);
lp->percent = arg_percent_value(cmd, extents_ARG, PERCENT_NONE);
}
/* Size returned in kilobyte units; held in sectors */
if (arg_count(cmd, size_ARG)) {
lp->size = arg_uint64_value(cmd, size_ARG, 0);
lp->sign = arg_sign_value(cmd, size_ARG, SIGN_NONE);
lp->percent = PERCENT_NONE;
}
if (arg_count(cmd, poolmetadatasize_ARG)) {
lp->poolmetadatasize = arg_uint64_value(cmd, poolmetadatasize_ARG, 0);
lp->poolmetadatasign = arg_sign_value(cmd, poolmetadatasize_ARG, SIGN_NONE);
if (lp->poolmetadatasign == SIGN_MINUS) {
log_error("Can't reduce pool metadata size.");
return 0;
}
}
}
if (lp->resize == LV_EXTEND && lp->sign == SIGN_MINUS) {
log_error("Negative argument not permitted - use lvreduce");
return 0;
}
if (lp->resize == LV_REDUCE &&
((lp->sign == SIGN_PLUS) || (lp->poolmetadatasign == SIGN_PLUS))) {
log_error("Positive sign not permitted - use lvextend");
return 0;
}
lp->resizefs = arg_is_set(cmd, resizefs_ARG);
lp->nofsck = arg_is_set(cmd, nofsck_ARG);
if (!argc) {
log_error("Please provide the logical volume name");
return 0;
}
lp->lv_name = argv[0];
argv++;
argc--;
if (!(lp->lv_name = skip_dev_dir(cmd, lp->lv_name, &dev_dir_found)) ||
!(lp->vg_name = extract_vgname(cmd, lp->lv_name))) {
log_error("Please provide a volume group name");
return 0;
}
if (!validate_name(lp->vg_name)) {
log_error("Volume group name %s has invalid characters",
lp->vg_name);
return 0;
}
if ((st = strrchr(lp->lv_name, '/')))
lp->lv_name = st + 1;
lp->argc = argc;
lp->argv = argv;
return 1;
}
static int _adjust_policy_params(struct cmd_context *cmd,
struct logical_volume *lv, struct lvresize_params *lp)
{
percent_t percent;
int policy_threshold, policy_amount;
if (lv_is_thin_pool(lv)) {
policy_threshold =
find_config_tree_int(cmd, activation_thin_pool_autoextend_threshold_CFG) * PERCENT_1;
policy_amount =
find_config_tree_int(cmd, activation_thin_pool_autoextend_percent_CFG);
if (!policy_amount && policy_threshold < PERCENT_100)
return 0;
} else {
policy_threshold =
find_config_tree_int(cmd, activation_snapshot_autoextend_threshold_CFG) * PERCENT_1;
policy_amount =
find_config_tree_int(cmd, activation_snapshot_autoextend_percent_CFG);
}
if (policy_threshold >= PERCENT_100)
return 1; /* nothing to do */
if (lv_is_thin_pool(lv)) {
if (!lv_thin_pool_percent(lv, 1, &percent))
return_0;
if ((PERCENT_0 < percent && percent <= PERCENT_100) &&
(percent > policy_threshold)) {
if (!pool_can_resize_metadata(lv)) {
log_error_once("Online metadata resize for %s/%s is not supported.",
lp->vg_name, lp->lv_name);
return 0;
}
lp->poolmetadatasize = (first_seg(lv)->metadata_lv->size *
policy_amount + 99) / 100;
lp->poolmetadatasign = SIGN_PLUS;
}
if (!lv_thin_pool_percent(lv, 0, &percent))
return_0;
if (!(PERCENT_0 < percent && percent <= PERCENT_100) ||
percent <= policy_threshold)
return 1;
} else {
if (!lv_snapshot_percent(lv, &percent))
return_0;
if (!(PERCENT_0 < percent && percent <= PERCENT_100) || percent <= policy_threshold)
return 1; /* nothing to do */
}
lp->extents = policy_amount;
lp->sizeargs = (lp->extents) ? 1 : 0;
return 1;
}
static uint32_t lvseg_get_stripes(struct lv_segment *seg, uint32_t *stripesize)
{
uint32_t s;
struct lv_segment *seg_mirr;
/* If segment mirrored, check if images are striped */
if (seg_is_mirrored(seg))
for (s = 0; s < seg->area_count; s++) {
if (seg_type(seg, s) != AREA_LV)
continue;
seg_mirr = first_seg(seg_lv(seg, s));
if (seg_is_striped(seg_mirr)) {
seg = seg_mirr;
break;
}
}
if (seg_is_striped(seg)) {
*stripesize = seg->stripe_size;
return seg->area_count;
}
*stripesize = 0;
return 0;
}
static int _lvresize_poolmetadata(struct cmd_context *cmd, struct volume_group *vg,
struct lvresize_params *lp,
const struct logical_volume *pool_lv,
struct dm_list *pvh,
alloc_policy_t alloc)
{
struct logical_volume *lv;
struct lv_segment *mseg;
uint32_t extents;
uint32_t seg_mirrors;
if (!pool_can_resize_metadata(pool_lv)) {
log_error("Support for online metadata resize not detected.");
return 0;
}
if (lp->poolmetadatasize % vg->extent_size) {
lp->poolmetadatasize += vg->extent_size -
(lp->poolmetadatasize % vg->extent_size);
log_print_unless_silent("Rounding pool metadata size to boundary between physical extents: %s",
display_size(cmd, lp->poolmetadatasize));
}
if (!(extents = extents_from_size(vg->cmd, lp->poolmetadatasize,
vg->extent_size)))
return_0;
lv = first_seg(pool_lv)->metadata_lv;
if (lp->poolmetadatasign == SIGN_PLUS) {
if (extents >= (MAX_EXTENT_COUNT - lv->le_count)) {
log_error("Unable to extend %s by %u extents, exceeds limit (%u).",
lv->name, lv->le_count, MAX_EXTENT_COUNT);
return 0;
}
extents += lv->le_count;
}
if (extents * vg->extent_size > DM_THIN_MAX_METADATA_SIZE) {
log_print_unless_silent("Rounding size to maximum supported size 16GiB "
"for metadata volume %s.", lv->name);
extents = (DM_THIN_MAX_METADATA_SIZE + vg->extent_size - 1) /
vg->extent_size;
}
if (extents == lv->le_count) {
log_print_unless_silent("Metadata volume %s has already %s.",
lv->name, display_size(cmd, lv->size));
return 2;
}
if (!lp->sizeargs && !archive(vg))
return_0;
log_print_unless_silent("Extending logical volume %s to %s.",
lv->name,
display_size(cmd, (uint64_t) extents * vg->extent_size));
mseg = last_seg(lv);
seg_mirrors = lv_mirror_count(lv);
if (!lv_extend(lv,
mseg->segtype,
mseg->area_count / seg_mirrors,
mseg->stripe_size,
seg_mirrors,
mseg->region_size,
extents - lv->le_count, NULL,
pvh, alloc))
return_0;
return 1;
}
static int _lvresize(struct cmd_context *cmd, struct volume_group *vg,
struct lvresize_params *lp)
{
struct logical_volume *lv;
uint32_t stripesize_extents;
uint32_t seg_stripes = 0, seg_stripesize = 0, seg_size;
uint32_t seg_mirrors = 0;
uint32_t extents_used;
uint32_t size_rest;
uint32_t pv_extent_count;
alloc_policy_t alloc;
struct logical_volume *lock_lv = NULL;
struct lv_list *lvl;
struct lv_segment *seg, *uninitialized_var(mirr_seg);
uint32_t seg_extents;
uint32_t sz, str;
int status;
struct dm_list *pvh = NULL;
int use_policy = arg_count(cmd, use_policies_ARG);
/* does LV exist? */
if (!(lvl = find_lv_in_vg(vg, lp->lv_name))) {
log_error("Logical volume %s not found in volume group %s",
lp->lv_name, lp->vg_name);
return ECMD_FAILED;
}
lv = lvl->lv;
if (lv_is_external_origin(lv)) {
/*
* Since external-origin can be activated read-only,
* there is no way to use extended areas.
*/
log_error("Cannot resize external origin \"%s\".", lv->name);
return EINVALID_CMD_LINE;
}
if (lv->status & (RAID_IMAGE | RAID_META)) {
log_error("Cannot resize a RAID %s directly",
(lv->status & RAID_IMAGE) ? "image" :
"metadata area");
return ECMD_FAILED;
}
if (lv_is_raid_with_tracking(lv)) {
log_error("Cannot resize %s while it is tracking a split image",
lv->name);
return ECMD_FAILED;
}
if (arg_count(cmd, stripes_ARG)) {
if (vg->fid->fmt->features & FMT_SEGMENTS)
lp->stripes = arg_uint_value(cmd, stripes_ARG, 1);
else
log_warn("Varied striping not supported. Ignoring.");
}
if (arg_count(cmd, mirrors_ARG)) {
if (vg->fid->fmt->features & FMT_SEGMENTS)
lp->mirrors = arg_uint_value(cmd, mirrors_ARG, 1) + 1;
else
log_warn("Mirrors not supported. Ignoring.");
if (arg_sign_value(cmd, mirrors_ARG, SIGN_NONE) == SIGN_MINUS) {
log_error("Mirrors argument may not be negative");
return EINVALID_CMD_LINE;
}
}
if (arg_count(cmd, stripesize_ARG) &&
!_validate_stripesize(cmd, vg, lp))
return EINVALID_CMD_LINE;
if (use_policy) {
if (!lv_is_cow(lv) &&
!lv_is_thin_pool(lv)) {
log_error("Policy-based resize is supported only for snapshot and thin pool volumes.");
return ECMD_FAILED;
}
if (!_adjust_policy_params(cmd, lv, lp))
return_ECMD_FAILED;
}
if (!lv_is_visible(lv) &&
!lv_is_thin_pool_metadata(lv)) {
log_error("Can't resize internal logical volume %s", lv->name);
return ECMD_FAILED;
}
if (lv->status & LOCKED) {
log_error("Can't resize locked LV %s", lv->name);
return ECMD_FAILED;
}
if (lv->status & CONVERTING) {
log_error("Can't resize %s while lvconvert in progress", lv->name);
return ECMD_FAILED;
}
alloc = (alloc_policy_t) arg_uint_value(cmd, alloc_ARG, lv->alloc);
/*
* First adjust to an exact multiple of extent size.
* When extending by a relative amount we round that amount up.
* When reducing by a relative amount we remove at most that amount.
* When changing to an absolute size, we round that size up.
*/
if (lp->size) {
if (lp->size % vg->extent_size) {
if (lp->sign == SIGN_MINUS)
lp->size -= lp->size % vg->extent_size;
else
lp->size += vg->extent_size -
(lp->size % vg->extent_size);
log_print_unless_silent("Rounding size to boundary between physical extents: %s",
display_size(cmd, lp->size));
}
lp->extents = lp->size / vg->extent_size;
}
if (!(pvh = lp->argc ? create_pv_list(cmd->mem, vg, lp->argc,
lp->argv, 1) : &vg->pvs))
return_ECMD_FAILED;
if (lp->sizeargs) { /* TODO: reindent or move to function */
switch(lp->percent) {
case PERCENT_VG:
lp->extents = percent_of_extents(lp->extents, vg->extent_count,
(lp->sign != SIGN_MINUS));
break;
case PERCENT_FREE:
lp->extents = percent_of_extents(lp->extents, vg->free_count,
(lp->sign != SIGN_MINUS));
break;
case PERCENT_LV:
lp->extents = percent_of_extents(lp->extents, lv->le_count,
(lp->sign != SIGN_MINUS));
break;
case PERCENT_PVS:
if (lp->argc) {
pv_extent_count = pv_list_extents_free(pvh);
lp->extents = percent_of_extents(lp->extents, pv_extent_count,
(lp->sign != SIGN_MINUS));
} else
lp->extents = percent_of_extents(lp->extents, vg->extent_count,
(lp->sign != SIGN_MINUS));
break;
case PERCENT_ORIGIN:
if (!lv_is_cow(lv)) {
log_error("Specified LV does not have an origin LV.");
return EINVALID_CMD_LINE;
}
lp->extents = percent_of_extents(lp->extents, origin_from_cow(lv)->le_count,
(lp->sign != SIGN_MINUS));
break;
case PERCENT_NONE:
break;
}
if (lp->sign == SIGN_PLUS) {
if (lp->extents >= (MAX_EXTENT_COUNT - lv->le_count)) {
log_error("Unable to extend %s by %u extents, exceeds limit (%u).",
lp->lv_name, lv->le_count, MAX_EXTENT_COUNT);
return EINVALID_CMD_LINE;
}
lp->extents += lv->le_count;
if (lv_is_cow(lv)) {
extents_used = cow_max_extents(origin_from_cow(lv), find_cow(lv)->chunk_size);
if (extents_used < lp->extents) {
log_print_unless_silent("Reached maximum COW size %s.",
display_size(vg->cmd, (uint64_t) vg->extent_size * extents_used));
lp->extents = extents_used;
if (lp->extents == lv->le_count)
return ECMD_PROCESSED;
}
}
} else if (lp->sign == SIGN_MINUS) {
if (lp->extents >= lv->le_count) {
log_error("Unable to reduce %s below 1 extent",
lp->lv_name);
return EINVALID_CMD_LINE;
}
lp->extents = lv->le_count - lp->extents;
}
if (!lp->extents) {
log_error("New size of 0 not permitted");
return EINVALID_CMD_LINE;
}
if (lp->extents == lv->le_count) {
/* A bit of hack - but still may resize metadata */
if (lp->poolmetadatasize) {
lp->sizeargs = 0;
goto metadata_resize;
}
if (use_policy)
return ECMD_PROCESSED; /* Nothing to do. */
if (!lp->resizefs) {
log_error("New size (%d extents) matches existing size "
"(%d extents)", lp->extents, lv->le_count);
return EINVALID_CMD_LINE;
}
lp->resize = LV_EXTEND; /* lets pretend zero size extension */
}
seg_size = lp->extents - lv->le_count;
/* Use segment type of last segment */
lp->segtype = last_seg(lv)->segtype;
/* FIXME Support LVs with mixed segment types */
if (lp->segtype != get_segtype_from_string(cmd, arg_str_value(cmd, type_ARG,
lp->segtype->name))) {
log_error("VolumeType does not match (%s)", lp->segtype->name);
return EINVALID_CMD_LINE;
}
/* If extending, find mirrors of last segment */
if ((lp->extents > lv->le_count)) {
/*
* Has the user specified that they would like the additional
* extents of a mirror not to have an initial sync?
*/
if (seg_is_mirrored(first_seg(lv)) && arg_count(cmd, nosync_ARG))
lv->status |= LV_NOTSYNCED;
dm_list_iterate_back_items(mirr_seg, &lv->segments) {
if (seg_is_mirrored(mirr_seg))
seg_mirrors = lv_mirror_count(mirr_seg->lv);
else
seg_mirrors = 0;
break;
}
if (!arg_count(cmd, mirrors_ARG) && seg_mirrors) {
log_print_unless_silent("Extending %" PRIu32 " mirror images.",
seg_mirrors);
lp->mirrors = seg_mirrors;
}
if ((arg_count(cmd, mirrors_ARG) || seg_mirrors) &&
(lp->mirrors != seg_mirrors)) {
log_error("Cannot vary number of mirrors in LV yet.");
return EINVALID_CMD_LINE;
}
if (seg_mirrors && !strcmp(mirr_seg->segtype->name, "raid10")) {
lp->stripes = mirr_seg->area_count / seg_mirrors;
lp->stripe_size = mirr_seg->stripe_size;
}
}
/* If extending, find stripes, stripesize & size of last segment */
if ((lp->extents > lv->le_count) &&
!(lp->stripes == 1 || (lp->stripes > 1 && lp->stripe_size)) &&
strcmp(mirr_seg->segtype->name, "raid10")) {
/* FIXME Don't assume mirror seg will always be AREA_LV */
/* FIXME We will need to support resize for metadata LV as well,
* and data LV could be any type (i.e. mirror)) */
dm_list_iterate_items(seg, seg_mirrors ? &seg_lv(mirr_seg, 0)->segments :
lv_is_thin_pool(lv) ? &seg_lv(first_seg(lv), 0)->segments : &lv->segments) {
/* Allow through "striped" and RAID 4/5/6/10 */
if (!seg_is_striped(seg) &&
(!seg_is_raid(seg) || seg_is_mirrored(seg)) &&
strcmp(seg->segtype->name, "raid10"))
continue;
sz = seg->stripe_size;
str = seg->area_count - lp->segtype->parity_devs;
if ((seg_stripesize && seg_stripesize != sz &&
sz && !lp->stripe_size) ||
(seg_stripes && seg_stripes != str && !lp->stripes)) {
log_error("Please specify number of "
"stripes (-i) and stripesize (-I)");
return EINVALID_CMD_LINE;
}
seg_stripesize = sz;
seg_stripes = str;
}
if (!lp->stripes)
lp->stripes = seg_stripes;
else if (seg_is_raid(first_seg(lv)) &&
(lp->stripes != seg_stripes)) {
log_error("Unable to extend \"%s\" segment type with different number of stripes.", first_seg(lv)->segtype->ops->name(first_seg(lv)));
return ECMD_FAILED;
}
if (!lp->stripe_size && lp->stripes > 1) {
if (seg_stripesize) {
log_print_unless_silent("Using stripesize of last segment %s",
display_size(cmd, (uint64_t) seg_stripesize));
lp->stripe_size = seg_stripesize;
} else {
lp->stripe_size =
find_config_tree_int(cmd, metadata_stripesize_CFG) * 2;
log_print_unless_silent("Using default stripesize %s",
display_size(cmd, (uint64_t) lp->stripe_size));
}
}
}
/* If reducing, find stripes, stripesize & size of last segment */
if (lp->extents < lv->le_count) {
extents_used = 0;
if (lp->stripes || lp->stripe_size || lp->mirrors)
log_error("Ignoring stripes, stripesize and mirrors "
"arguments when reducing");
dm_list_iterate_items(seg, &lv->segments) {
seg_extents = seg->len;
/* Check for underlying stripe sizes */
seg_stripes = lvseg_get_stripes(seg, &seg_stripesize);
if (seg_is_mirrored(seg))
seg_mirrors = lv_mirror_count(seg->lv);
else
seg_mirrors = 0;
if (lp->extents <= extents_used + seg_extents)
break;
extents_used += seg_extents;
}
seg_size = lp->extents - extents_used;
lp->stripe_size = seg_stripesize;
lp->stripes = seg_stripes;
lp->mirrors = seg_mirrors;
}
if (lp->stripes > 1 && !lp->stripe_size) {
log_error("Stripesize for striped segment should not be 0!");
return EINVALID_CMD_LINE;
}
if (lp->stripes > 1) {
if (lp->stripe_size < STRIPE_SIZE_MIN) {
log_error("Invalid stripe size %s",
display_size(cmd, (uint64_t) lp->stripe_size));
return EINVALID_CMD_LINE;
}
if (!(stripesize_extents = lp->stripe_size / vg->extent_size))
stripesize_extents = 1;
size_rest = seg_size % (lp->stripes * stripesize_extents);
/* Round toward the original size. */
if (size_rest &&
((lp->extents < lv->le_count) ||
!lp->percent ||
(vg->free_count >= (lp->extents - lv->le_count - size_rest +
(lp->stripes * stripesize_extents))))) {
log_print_unless_silent("Rounding size (%d extents) up to stripe "
"boundary size for segment (%d extents)",
lp->extents, lp->extents - size_rest +
(lp->stripes * stripesize_extents));
lp->extents = lp->extents - size_rest +
(lp->stripes * stripesize_extents);
} else if (size_rest) {
log_print_unless_silent("Rounding size (%d extents) down to stripe "
"boundary size for segment (%d extents)",
lp->extents, lp->extents - size_rest);
lp->extents = lp->extents - size_rest;
}
}
if (lp->extents < lv->le_count) {
if (lp->resize == LV_EXTEND) {
log_error("New size given (%d extents) not larger "
"than existing size (%d extents)",
lp->extents, lv->le_count);
return EINVALID_CMD_LINE;
}
lp->resize = LV_REDUCE;
} else if (lp->extents > lv->le_count) {
if (lp->resize == LV_REDUCE) {
log_error("New size given (%d extents) not less than "
"existing size (%d extents)", lp->extents,
lv->le_count);
return EINVALID_CMD_LINE;
}
lp->resize = LV_EXTEND;
} else if (lp->extents == lv->le_count) {
if (use_policy)
return ECMD_PROCESSED; /* Nothing to do. */
if (!lp->resizefs) {
log_error("New size (%d extents) matches existing size "
"(%d extents)", lp->extents, lv->le_count);
return EINVALID_CMD_LINE;
}
lp->resize = LV_EXTEND;
}
if (lv_is_origin(lv)) {
if (lp->resize == LV_REDUCE) {
log_error("Snapshot origin volumes cannot be reduced "
"in size yet.");
return ECMD_FAILED;
}
if (lv_is_active(lv)) {
log_error("Snapshot origin volumes can be resized "
"only while inactive: try lvchange -an");
return ECMD_FAILED;
}
}
if (lv_is_thin_pool(lv)) {
if (lp->resize == LV_REDUCE) {
log_error("Thin pool volumes cannot be reduced in size yet.");
return ECMD_FAILED;
}
if (lp->resizefs) {
log_warn("Thin pool volumes do not have filesystem.");
lp->resizefs = 0;
}
} else if (lp->poolmetadatasize) {
log_error("--poolmetadatasize can be used only with thin pools.");
return ECMD_FAILED;
}
if ((lp->resize == LV_REDUCE) && lp->argc)
log_warn("Ignoring PVs on command line when reducing");
/* Request confirmation before operations that are often mistakes. */
if ((lp->resizefs || (lp->resize == LV_REDUCE)) &&
!_request_confirmation(cmd, vg, lv, lp))
return_ECMD_FAILED;
if (lp->resizefs) {
if (!lp->nofsck &&
!_fsadm_cmd(cmd, vg, lp, FSADM_CMD_CHECK, &status)) {
if (status != FSADM_CHECK_FAILS_FOR_MOUNTED) {
log_error("Filesystem check failed.");
return ECMD_FAILED;
}
/* some filesystems supports online resize */
}
if ((lp->resize == LV_REDUCE) &&
!_fsadm_cmd(cmd, vg, lp, FSADM_CMD_RESIZE, NULL)) {
log_error("Filesystem resize failed.");
return ECMD_FAILED;
}
}
if (!archive(vg))
return_ECMD_FAILED;
log_print_unless_silent("%sing logical volume %s to %s",
(lp->resize == LV_REDUCE) ? "Reduc" : "Extend",
lv->name,
display_size(cmd, (uint64_t) lp->extents * vg->extent_size));
if (lp->resize == LV_REDUCE) {
if (!lv_reduce(lv, lv->le_count - lp->extents))
return ECMD_FAILED;
} else if ((lp->extents > lv->le_count) && /* Ensure we extend */
!lv_extend(lv, lp->segtype,
lp->stripes, lp->stripe_size,
lp->mirrors, first_seg(lv)->region_size,
lp->extents - lv->le_count, NULL,
pvh, alloc))
return_ECMD_FAILED;
/* If thin metadata, must suspend thin pool */
if (lv_is_thin_pool_metadata(lv)) {
if (!(lock_lv = find_pool_lv(lv)))
return_0;
/* If snapshot, must suspend all associated devices */
} else if (lv_is_cow(lv))
lock_lv = origin_from_cow(lv);
else
lock_lv = lv;
} /* lp->sizeargs */
if (lp->poolmetadatasize) {
metadata_resize:
if (!(status = _lvresize_poolmetadata(cmd, vg, lp, lv, pvh, alloc)))
return_ECMD_FAILED;
else if ((status == 2) && !lp->sizeargs)
return ECMD_PROCESSED;
lock_lv = lv;
}
if (!lock_lv)
return ECMD_PROCESSED; /* Nothing to do */
/* store vg on disk(s) */
if (!vg_write(vg))
return_ECMD_FAILED;
if (!suspend_lv(cmd, lock_lv)) {
log_error("Failed to suspend %s", lock_lv->name);
vg_revert(vg);
backup(vg);
return ECMD_FAILED;
}
if (!vg_commit(vg)) {
stack;
if (!resume_lv(cmd, lock_lv))
stack;
backup(vg);
return ECMD_FAILED;
}
if (!resume_lv(cmd, lock_lv)) {
log_error("Problem reactivating %s", lock_lv->name);
backup(vg);
return ECMD_FAILED;
}
if (lv_is_cow_covering_origin(lv))
if (!monitor_dev_for_events(cmd, lv, 0, 0))
stack;
backup(vg);
/*
* Update lvm pool metadata (drop messages) if the pool has been
* resumed and do a pool active/deactivate in other case.
*
* Note: Active thin pool can be waiting for resize.
*
* FIXME: Activate only when thin volume is active
*/
if (lv_is_thin_pool(lv) &&
!update_pool_lv(lv, !lv_is_active(lv)))
return_ECMD_FAILED;
log_print_unless_silent("Logical volume %s successfully resized", lp->lv_name);
if (lp->resizefs && (lp->resize == LV_EXTEND) &&
!_fsadm_cmd(cmd, vg, lp, FSADM_CMD_RESIZE, NULL))
return_ECMD_FAILED;
return ECMD_PROCESSED;
}
int lvresize(struct cmd_context *cmd, int argc, char **argv)
{
struct lvresize_params lp = { 0 };
struct volume_group *vg;
int r;
if (!_lvresize_params(cmd, argc, argv, &lp))
return EINVALID_CMD_LINE;
log_verbose("Finding volume group %s", lp.vg_name);
vg = vg_read_for_update(cmd, lp.vg_name, NULL, 0);
if (vg_read_error(vg)) {
release_vg(vg);
return_ECMD_FAILED;
}
if (!(r = _lvresize(cmd, vg, &lp)))
stack;
unlock_and_release_vg(cmd, vg, lp.vg_name);
return r;
}
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