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lvm2/tools/lvconvert.c
Heinz Mauelshagen 46a772fbc4 lvconvert: add support to change RAID region size (fixup) 
Commit cfb6ef654d introduced
support to change RAID region size.

Add:
- missing conditions to support any types to function with
  it in lv_raid_convert();  temporary workaround used until
  cli validation patches get merged
- tests requesting "-R " to lvconvert-raid-takeover.sh
  involving a cleanup of the script

Related: rhbz1392947
2017-02-07 16:52:04 +01:00

4869 lines
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/*
* Copyright (C) 2005-2016 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "tools.h"
#include "polldaemon.h"
#include "lv_alloc.h"
#include "lvconvert_poll.h"
/*
* Guidelines for mapping options to operations.
*
* There should be a clear and unique correspondence between an option
* name and the operation to be performed.
*
* An option with a given name should always perform the same operation.
* If the same operation applies to two types of LV, then the same option
* name can be used with both LV types. But, a given option name should
* not be used to perform different operations depending on the LV type it
* is used with.
*
* --merge and --split are examples where a single option name has been
* overloaded with different operations. The case of --split has been
* corrected with the clear and unique variations --splitcache,
* --splitsnapshot, --splitmirror, which should allow --split to be
* deprecated. (The same is still needed for --merge.)
*/
typedef enum {
/* Merge:
* If merge_snapshot is also set:
* merge thin snapshot LV into its origin
* merge old snapshot COW into its origin
* or if merge_mirror is also set
* merge LV previously split from mirror back into mirror
*/
CONV_MERGE = 1,
/* Split:
* For a snapshot, split it apart into COW and origin for future recombination
* For a cached LV, split it apart into the cached LV and its pool
* For a mirrored or raid LV, split mirror into two mirrors, optionally tracking
* future changes to the main mirror to allow future recombination.
*/
CONV_SPLIT = 2,
CONV_SPLIT_SNAPSHOT = 3,
CONV_SPLIT_CACHE = 4,
CONV_SPLIT_MIRRORS = 5,
/* Start to cache an LV */
CONV_CACHE = 6,
/* Destroy the cache attached to a cached LV */
CONV_UNCACHE = 7,
/* Reconstruct a snapshot from its origin and COW */
CONV_SNAPSHOT = 8,
/* Replace devices in a raid LV with alternatives */
CONV_REPLACE = 9,
/* Repair a mirror, raid or thin LV */
CONV_REPAIR = 10,
/* Convert normal LV into one in a thin pool */
CONV_THIN = 11,
/* Every other segment type or mirror log conversion we haven't separated out */
CONV_OTHER = 12,
} conversion_type_t;
struct lvconvert_params {
/* Exactly one of these 12 command categories is determined */
int merge; /* 1 */
int split; /* 2 */
int splitsnapshot; /* 3 */
int splitcache; /* 4 */
int keep_mimages; /* 5 */ /* --splitmirrors */
int cache; /* 6 */
int uncache; /* 7 */
int snapshot; /* 8 */
int replace; /* 9 */
int repair; /* 10 */
int thin; /* 11 */
/* other */ /* 12 */
/* FIXME Eliminate all cases where more than one of the above are set then use conv_type instead */
conversion_type_t conv_type;
int merge_snapshot; /* CONV_MERGE is set */
int merge_mirror; /* CONV_MERGE is set */
int track_changes; /* CONV_SPLIT_MIRRORS is set */
int corelog; /* Equivalent to --mirrorlog core */
int mirrorlog; /* Only one of corelog and mirrorlog may be set */
int mirrors_supplied; /* When type_str is not set, this may be set with keep_mimages for --splitmirrors */
const char *type_str; /* When this is set, mirrors_supplied may optionally also be set */
/* Holds what you asked for based on --type or other arguments, else "" */
const struct segment_type *segtype; /* Holds what segment type you will get */
int poolmetadataspare;
int force;
int yes;
int zero;
const char *lv_name;
const char *lv_split_name;
const char *lv_name_full;
const char *vg_name;
int wait_completion;
int need_polling;
int thin_chunk_size_calc_policy;
uint32_t chunk_size;
uint32_t region_size;
uint32_t mirrors;
sign_t mirrors_sign;
uint32_t stripes;
uint32_t stripe_size;
unsigned stripes_supplied;
unsigned stripe_size_supplied;
uint32_t read_ahead;
cache_mode_t cache_mode; /* cache */
const char *policy_name; /* cache */
struct dm_config_tree *policy_settings; /* cache */
unsigned target_attr;
alloc_policy_t alloc;
int pv_count;
char **pvs;
struct dm_list *pvh;
int replace_pv_count;
char **replace_pvs;
struct dm_list *replace_pvh;
struct logical_volume *lv_to_poll;
struct dm_list idls;
uint32_t pool_metadata_extents;
int passed_args;
uint64_t pool_metadata_size;
const char *origin_name;
const char *pool_data_name;
struct logical_volume *pool_data_lv;
const char *pool_metadata_name;
struct logical_volume *pool_metadata_lv;
thin_discards_t discards;
};
struct convert_poll_id_list {
struct dm_list list;
struct poll_operation_id *id;
unsigned is_merging_origin:1;
unsigned is_merging_origin_thin:1;
};
/* FIXME Temporary function until the enum replaces the separate variables */
static void _set_conv_type(struct lvconvert_params *lp, int conv_type)
{
if (lp->conv_type != CONV_OTHER)
log_error(INTERNAL_ERROR "Changing conv_type from %d to %d.", lp->conv_type, conv_type);
lp->conv_type = conv_type;
}
static int _lvconvert_validate_names(struct lvconvert_params *lp)
{
unsigned i, j;
const char *names[] = {
(lp->lv_name == lp->pool_data_name) ? NULL : lp->lv_name, "converted",
lp->pool_data_name, "pool",
lp->pool_metadata_name, "pool metadata",
lp->origin_name, "origin",
};
for (i = 0; i < DM_ARRAY_SIZE(names); i += 2)
if (names[i])
for (j = i + 2; j < DM_ARRAY_SIZE(names); j += 2)
if (names[j] && !strcmp(names[i], names[j])) {
log_error("Can't use same name %s for %s and %s volume.",
names[i], names[i + 1], names[j + 1]);
return 0;
}
return 1;
}
static int _lvconvert_name_params(struct lvconvert_params *lp,
struct cmd_context *cmd,
int *pargc, char ***pargv)
{
if (lp->merge) {
/* FIXME Multiple arguments that mix snap and mirror? */
if (!*pargc) {
log_error("Please specify a logical volume path.");
return 0;
}
if (!strstr((*pargv)[0], "_rimage_")) { /* Snapshot */
lp->type_str = SEG_TYPE_NAME_SNAPSHOT;
lp->merge_snapshot = 1;
return 1;
}
/* Mirror */
lp->merge_mirror = 1;
}
if (!*pargc) {
if (lp->cache) {
log_error("Logical volume name for caching is missing.");
return 0;
}
if (lp->thin) {
log_error("Please specify a logical volume to act as "
"the external origin.");
return 0;
}
if (lp->snapshot) {
log_error("Please specify a logical volume to act as "
"the snapshot exception store.");
return 0;
}
if (lp->split) {
log_error("Logical volume for split is missing.");
return 0;
}
if (lp->splitcache) {
log_error("Cache logical volume for split is missing.");
return 0;
}
if (lp->uncache) {
log_error("Cache logical volume for uncache is missing.");
return 0;
}
if (!lp->lv_name_full) {
log_error("Please provide logical volume path.");
return 0;
}
} else if (!lp->lv_name_full) {
lp->lv_name_full = (*pargv)[0];
(*pargv)++, (*pargc)--;
}
if (!validate_restricted_lvname_param(cmd, &lp->vg_name, &lp->pool_metadata_name))
return_0;
if (!validate_restricted_lvname_param(cmd, &lp->vg_name, &lp->pool_data_name))
return_0;
if (!validate_restricted_lvname_param(cmd, &lp->vg_name, &lp->origin_name))
return_0;
if (!validate_restricted_lvname_param(cmd, &lp->vg_name, &lp->lv_split_name))
return_0;
if (!lp->vg_name && !strchr(lp->lv_name_full, '/')) {
/* Check for $LVM_VG_NAME */
if (!(lp->vg_name = extract_vgname(cmd, NULL))) {
log_error("Please specify a logical volume path.");
return 0;
}
}
if (!validate_lvname_param(cmd, &lp->vg_name, &lp->lv_name_full))
return_0;
lp->lv_name = lp->lv_name_full;
if (!validate_name(lp->vg_name)) {
log_error("Please provide a valid volume group name");
return 0;
}
/*
* FIXME: avoid this distinct validation out of scope of _convert_*()
*
* We should not rely on namespace here any more!
* It is the duty of lvcreate/lvrename to avoid reserved names.
*/
if (!lp->merge_mirror &&
!lp->repair &&
!lp->keep_mimages &&
!strstr(lp->lv_name, "_tdata") &&
!strstr(lp->lv_name, "_tmeta") &&
!strstr(lp->lv_name, "_cdata") &&
!strstr(lp->lv_name, "_cmeta") &&
!strstr(lp->lv_name, "_corig") &&
!apply_lvname_restrictions(lp->lv_name))
return_0;
if (*pargc) {
if (lp->snapshot) {
log_error("Too many arguments provided for snapshots.");
return 0;
}
if (lp->splitsnapshot) {
log_error("Too many arguments provided with --splitsnapshot.");
return 0;
}
if (lp->splitcache) {
log_error("Too many arguments provided with --splitcache.");
return 0;
}
if (lp->split) {
log_error("Too many arguments provided with --split.");
return 0;
}
if (lp->uncache) {
log_error("Too many arguments provided with --uncache.");
return 0;
}
if (lp->pool_data_name && lp->pool_metadata_name) {
log_error("Too many arguments provided for pool.");
return 0;
}
}
if (!_lvconvert_validate_names(lp))
return_0;
return 1;
}
/* -s/--snapshot and --type snapshot are synonyms */
static int _snapshot_type_requested(struct cmd_context *cmd, const char *type_str)
{
return (arg_is_set(cmd, snapshot_ARG) || !strcmp(type_str, SEG_TYPE_NAME_SNAPSHOT));
}
static int _raid0_type_requested(const char *type_str)
{
return (!strcmp(type_str, SEG_TYPE_NAME_RAID0) || !strcmp(type_str, SEG_TYPE_NAME_RAID0_META));
}
/* mirror/raid* (1,10,4,5,6 and their variants) reshape */
static int _mirror_or_raid_type_requested(struct cmd_context *cmd, const char *type_str)
{
return (arg_is_set(cmd, mirrors_ARG) || !strcmp(type_str, SEG_TYPE_NAME_MIRROR) ||
(!strncmp(type_str, SEG_TYPE_NAME_RAID, 4) && !_raid0_type_requested(type_str)));
}
static int _linear_type_requested(const char *type_str)
{
return (!strcmp(type_str, SEG_TYPE_NAME_LINEAR));
}
static int _striped_type_requested(const char *type_str)
{
return (!strcmp(type_str, SEG_TYPE_NAME_STRIPED) || _linear_type_requested(type_str));
}
static int _read_conversion_type(struct cmd_context *cmd,
struct lvconvert_params *lp)
{
const char *type_str = arg_str_value(cmd, type_ARG, "");
lp->type_str = type_str;
if (!lp->type_str[0])
return 1;
/* FIXME: Check thin-pool and thin more thoroughly! */
if (!strcmp(type_str, SEG_TYPE_NAME_SNAPSHOT) || _striped_type_requested(type_str) ||
!strncmp(type_str, SEG_TYPE_NAME_RAID, 4) || !strcmp(type_str, SEG_TYPE_NAME_MIRROR) ||
!strcmp(type_str, SEG_TYPE_NAME_CACHE_POOL) || !strcmp(type_str, SEG_TYPE_NAME_CACHE) ||
!strcmp(type_str, SEG_TYPE_NAME_THIN_POOL) || !strcmp(type_str, SEG_TYPE_NAME_THIN))
return 1;
log_error("Conversion using --type %s is not supported.", type_str);
return 0;
}
static int _read_pool_params(struct cmd_context *cmd, int *pargc, char ***pargv,
struct lvconvert_params *lp)
{
int cachepool = 0;
int thinpool = 0;
struct segment_type *segtype;
if ((lp->pool_data_name = arg_str_value(cmd, cachepool_ARG, NULL))) {
if (lp->type_str[0] &&
strcmp(lp->type_str, SEG_TYPE_NAME_CACHE) &&
strcmp(lp->type_str, SEG_TYPE_NAME_CACHE_POOL)) {
log_error("--cachepool argument is only valid with "
"the cache or cache-pool segment type.");
return 0;
}
cachepool = 1;
lp->type_str = SEG_TYPE_NAME_CACHE_POOL;
} else if (!strcmp(lp->type_str, SEG_TYPE_NAME_CACHE_POOL))
cachepool = 1;
else if ((lp->pool_data_name = arg_str_value(cmd, thinpool_ARG, NULL))) {
if (lp->type_str[0] &&
strcmp(lp->type_str, SEG_TYPE_NAME_THIN) &&
strcmp(lp->type_str, SEG_TYPE_NAME_THIN_POOL)) {
log_error("--thinpool argument is only valid with "
"the thin or thin-pool segment type.");
return 0;
}
thinpool = 1;
lp->type_str = SEG_TYPE_NAME_THIN_POOL;
} else if (!strcmp(lp->type_str, SEG_TYPE_NAME_THIN_POOL))
thinpool = 1;
if (lp->cache && !cachepool) {
log_error("--cache requires --cachepool.");
return 0;
}
if ((lp->cache || cachepool) &&
!get_cache_params(cmd, &lp->cache_mode, &lp->policy_name, &lp->policy_settings)) {
log_error("Failed to parse cache policy and/or settings.");
return 0;
}
if (thinpool) {
lp->discards = (thin_discards_t) arg_uint_value(cmd, discards_ARG, THIN_DISCARDS_PASSDOWN);
lp->origin_name = arg_str_value(cmd, originname_ARG, NULL);
} else {
if (arg_from_list_is_set(cmd, "is valid only with thin pools",
discards_ARG, originname_ARG, thinpool_ARG,
-1))
return_0;
if (lp->thin) {
log_error("--thin requires --thinpool.");
return 0;
}
}
if (thinpool || cachepool) {
if (arg_from_list_is_set(cmd, "is invalid with pools",
merge_ARG, mirrors_ARG, repair_ARG, snapshot_ARG,
splitmirrors_ARG, splitsnapshot_ARG, -1))
return_0;
if (!(segtype = get_segtype_from_string(cmd, lp->type_str)))
return_0;
if (!get_pool_params(cmd, segtype, &lp->passed_args,
&lp->pool_metadata_size,
&lp->poolmetadataspare,
&lp->chunk_size, &lp->discards,
&lp->zero))
return_0;
if ((lp->pool_metadata_name = arg_str_value(cmd, poolmetadata_ARG, NULL)) &&
arg_from_list_is_set(cmd, "is invalid with --poolmetadata",
stripesize_ARG, stripes_long_ARG,
readahead_ARG, -1))
return_0;
if (!lp->pool_data_name) {
if (!*pargc) {
log_error("Please specify the pool data LV.");
return 0;
}
lp->pool_data_name = (*pargv)[0];
(*pargv)++, (*pargc)--;
}
if (!lp->thin && !lp->cache)
lp->lv_name_full = lp->pool_data_name;
/* Hmm _read_activation_params */
lp->read_ahead = arg_uint_value(cmd, readahead_ARG,
cmd->default_settings.read_ahead);
} else if (arg_from_list_is_set(cmd, "is valid only with pools",
poolmetadatasize_ARG, poolmetadataspare_ARG,
zero_ARG,
-1))
return_0;
return 1;
}
static int _read_params(struct cmd_context *cmd, int argc, char **argv,
struct lvconvert_params *lp)
{
int i;
const char *tmp_str;
struct arg_value_group_list *group;
int region_size;
int pagesize = lvm_getpagesize();
if (!_read_conversion_type(cmd, lp))
return_0;
if (!arg_is_set(cmd, background_ARG))
lp->wait_completion = 1;
if (arg_is_set(cmd, corelog_ARG))
lp->corelog = 1;
if (arg_is_set(cmd, mirrorlog_ARG)) {
if (lp->corelog) {
log_error("--mirrorlog and --corelog are incompatible.");
return 0;
}
lp->mirrorlog = 1;
}
if (arg_is_set(cmd, merge_ARG)) {
if (arg_outside_list_is_set(cmd, "cannot be used with --merge",
merge_ARG,
background_ARG, interval_ARG,
force_ARG, noudevsync_ARG, test_ARG,
-1))
return_0;
lp->merge = 1;
_set_conv_type(lp, CONV_MERGE);
} else if (arg_is_set(cmd, repair_ARG)) {
if (arg_outside_list_is_set(cmd, "cannot be used with --repair",
repair_ARG,
alloc_ARG, usepolicies_ARG,
background_ARG, interval_ARG,
force_ARG, noudevsync_ARG, test_ARG,
-1))
return_0;
lp->repair = 1;
_set_conv_type(lp, CONV_REPAIR);
} else if (arg_is_set(cmd, split_ARG)) {
if (arg_outside_list_is_set(cmd, "cannot be used with --split",
split_ARG,
name_ARG,
force_ARG, noudevsync_ARG, test_ARG,
-1))
return_0;
lp->split = 1;
_set_conv_type(lp, CONV_SPLIT);
} else if (arg_is_set(cmd, splitcache_ARG)) {
if (arg_outside_list_is_set(cmd, "cannot be used with --splitcache",
splitcache_ARG,
force_ARG, noudevsync_ARG, test_ARG,
-1))
return_0;
lp->splitcache = 1;
_set_conv_type(lp, CONV_SPLIT_CACHE);
} else if (arg_is_set(cmd, splitsnapshot_ARG)) {
if (arg_outside_list_is_set(cmd, "cannot be used with --splitsnapshot",
splitsnapshot_ARG,
force_ARG, noudevsync_ARG, test_ARG,
-1))
return_0;
lp->splitsnapshot = 1;
_set_conv_type(lp, CONV_SPLIT_SNAPSHOT);
} else if (arg_is_set(cmd, uncache_ARG)) {
if (arg_outside_list_is_set(cmd, "cannot be used with --uncache",
uncache_ARG,
force_ARG, noudevsync_ARG, test_ARG,
-1))
return_0;
lp->uncache = 1;
_set_conv_type(lp, CONV_UNCACHE);
} else if (arg_is_set(cmd, replace_ARG)) {
lp->replace = 1;
_set_conv_type(lp, CONV_REPLACE);
}
if (arg_is_set(cmd, cache_ARG)) {
lp->cache = 1;
_set_conv_type(lp, CONV_CACHE);
}
if (!strcmp(lp->type_str, SEG_TYPE_NAME_CACHE))
lp->cache = 1;
else if (lp->cache) {
if (lp->type_str[0]) {
log_error("--cache is incompatible with --type %s", lp->type_str);
return 0;
}
lp->type_str = SEG_TYPE_NAME_CACHE;
}
if (arg_is_set(cmd, thin_ARG)) {
lp->thin = 1;
_set_conv_type(lp, CONV_THIN);
}
if (!strcmp(lp->type_str, SEG_TYPE_NAME_THIN))
lp->thin = 1;
else if (lp->thin) {
if (lp->type_str[0]) {
log_error("--thin is incompatible with --type %s", lp->type_str);
return 0;
}
lp->type_str = SEG_TYPE_NAME_THIN;
}
if (arg_is_set(cmd, trackchanges_ARG))
lp->track_changes = 1;
if (!_read_pool_params(cmd, &argc, &argv, lp))
return_0;
if (_snapshot_type_requested(cmd, lp->type_str)) {
if (lp->merge) {
log_error("--snapshot and --merge are mutually exclusive.");
return 0;
}
lp->snapshot = 1;
_set_conv_type(lp, CONV_SNAPSHOT);
}
if (lp->split) {
lp->lv_split_name = arg_str_value(cmd, name_ARG, NULL);
/*
* The '--splitmirrors n' argument is equivalent to '--mirrors -n'
* (note the minus sign), except that it signifies the additional
* intent to keep the mimage that is detached, rather than
* discarding it.
*/
} else if (arg_is_set(cmd, splitmirrors_ARG)) {
if (_mirror_or_raid_type_requested(cmd, lp->type_str)) {
log_error("--mirrors/--type mirror/--type raid* and --splitmirrors are "
"mutually exclusive.");
return 0;
}
if (!arg_is_set(cmd, name_ARG) && !lp->track_changes) {
log_error("Please name the new logical volume using '--name'");
return 0;
}
lp->lv_split_name = arg_str_value(cmd, name_ARG, NULL);
lp->keep_mimages = 1;
_set_conv_type(lp, CONV_SPLIT_MIRRORS);
lp->mirrors = arg_uint_value(cmd, splitmirrors_ARG, 0);
lp->mirrors_sign = SIGN_MINUS;
} else {
if (lp->track_changes) {
log_error("--trackchanges is only valid with --splitmirrors.");
return 0;
}
if (arg_is_set(cmd, name_ARG)) {
log_error("The 'name' argument is only valid with --splitmirrors");
return 0;
}
}
/* If no other case was identified, then use of --stripes means --type striped */
if (!arg_is_set(cmd, type_ARG) && !*lp->type_str && !lp->merge && !lp->splitsnapshot &&
!lp->splitcache && !lp->split && !lp->snapshot && !lp->uncache && !lp->cache && !lp->thin &&
!lp->replace && !lp->repair && !lp->mirrorlog && !lp->corelog &&
(arg_is_set(cmd, stripes_long_ARG) || arg_is_set(cmd, stripesize_ARG)))
lp->type_str = SEG_TYPE_NAME_STRIPED;
if ((_snapshot_type_requested(cmd, lp->type_str) || lp->merge) &&
(lp->mirrorlog || _mirror_or_raid_type_requested(cmd, lp->type_str) ||
lp->repair || arg_is_set(cmd, thinpool_ARG) || _raid0_type_requested(lp->type_str) ||
_striped_type_requested(lp->type_str))) {
log_error("--snapshot/--type snapshot or --merge argument "
"cannot be mixed with --mirrors/--type mirror/--type raid*/--stripes/--type striped/--type linear, "
"--mirrorlog, --repair or --thinpool.");
return 0;
}
if ((arg_is_set(cmd, stripes_long_ARG) || arg_is_set(cmd, stripesize_ARG)) &&
!(_mirror_or_raid_type_requested(cmd, lp->type_str) || _striped_type_requested(lp->type_str) ||
_raid0_type_requested(lp->type_str) || lp->repair || arg_is_set(cmd, thinpool_ARG))) {
log_error("--stripes or --stripesize argument is only valid "
"with --mirrors/--type mirror/--type raid*/--type striped/--type linear, --repair and --thinpool");
return 0;
}
if (arg_is_set(cmd, mirrors_ARG)) {
/* --splitmirrors is the mechanism for detaching and keeping a mimage */
lp->mirrors_supplied = 1;
lp->mirrors = arg_uint_value(cmd, mirrors_ARG, 0);
lp->mirrors_sign = arg_sign_value(cmd, mirrors_ARG, SIGN_NONE);
}
lp->alloc = (alloc_policy_t) arg_uint_value(cmd, alloc_ARG, ALLOC_INHERIT);
/* We should have caught all these cases already. */
if (lp->merge + lp->splitsnapshot + lp->splitcache + lp->split + lp->uncache +
lp->cache + lp->thin + lp->keep_mimages + lp->snapshot + lp->replace + lp->repair > 1) {
log_error(INTERNAL_ERROR "Unexpected combination of incompatible options selected.");
return 0;
}
/*
* Final checking of each case:
* lp->merge
* lp->splitsnapshot
* lp->splitcache
* lp->split
* lp->uncache
* lp->cache
* lp->thin
* lp->keep_mimages
* lp->snapshot
* lp->replace
* lp->repair
* --type mirror|raid lp->mirrorlog lp->corelog
* --type raid0|striped
*/
switch(lp->conv_type) {
case CONV_MERGE: /* Snapshot or mirror merge */
case CONV_SPLIT:
case CONV_SPLIT_CACHE:
case CONV_SPLIT_MIRRORS:
case CONV_SPLIT_SNAPSHOT: /* Destroy snapshot retaining cow as separate LV */
case CONV_CACHE:
case CONV_UNCACHE:
case CONV_THIN:
case CONV_REPAIR:
break;
case CONV_SNAPSHOT: /* Snapshot creation from pre-existing cow */
if (!argc) {
log_error("Please provide logical volume path for snapshot origin.");
return 0;
}
lp->origin_name = argv[0];
argv++, argc--;
if (arg_is_set(cmd, regionsize_ARG)) {
log_error("--regionsize is only available with mirrors");
return 0;
}
if (arg_is_set(cmd, stripesize_ARG) || arg_is_set(cmd, stripes_long_ARG)) {
log_error("--stripes and --stripesize are only available with striped mirrors");
return 0;
}
if (arg_is_set(cmd, chunksize_ARG) &&
(arg_sign_value(cmd, chunksize_ARG, SIGN_NONE) == SIGN_MINUS)) {
log_error("Negative chunk size is invalid.");
return 0;
}
lp->chunk_size = arg_uint_value(cmd, chunksize_ARG, 8);
if (lp->chunk_size < 8 || lp->chunk_size > 1024 ||
!is_power_of_2(lp->chunk_size)) {
log_error("Chunk size must be a power of 2 in the "
"range 4K to 512K");
return 0;
}
log_verbose("Setting chunk size to %s.", display_size(cmd, lp->chunk_size));
lp->type_str = SEG_TYPE_NAME_SNAPSHOT;
break;
case CONV_REPLACE: /* RAID device replacement */
lp->replace_pv_count = arg_count(cmd, replace_ARG);
lp->replace_pvs = dm_pool_alloc(cmd->mem, sizeof(char *) * lp->replace_pv_count);
if (!lp->replace_pvs)
return_0;
i = 0;
dm_list_iterate_items(group, &cmd->arg_value_groups) {
if (!grouped_arg_is_set(group->arg_values, replace_ARG))
continue;
if (!(tmp_str = grouped_arg_str_value(group->arg_values,
replace_ARG,
NULL))) {
log_error("Failed to get '--replace' argument");
return 0;
}
if (!(lp->replace_pvs[i++] = dm_pool_strdup(cmd->mem,
tmp_str)))
return_0;
}
break;
case CONV_OTHER:
if (_mirror_or_raid_type_requested(cmd, lp->type_str) ||
lp->mirrorlog || lp->corelog) { /* Mirrors (and some RAID functions) */
if (arg_is_set(cmd, chunksize_ARG)) {
log_error("--chunksize is only available with snapshots or pools.");
return 0;
}
if (arg_is_set(cmd, zero_ARG)) {
log_error("--zero is only available with snapshots or thin pools.");
return 0;
}
/*
* --regionsize is only valid if converting an LV into a mirror.
* Checked when we know the state of the LV being converted.
*/
if (arg_is_set(cmd, regionsize_ARG)) {
if (arg_sign_value(cmd, regionsize_ARG, SIGN_NONE) ==
SIGN_MINUS) {
log_error("Negative regionsize is invalid.");
return 0;
}
lp->region_size = arg_uint_value(cmd, regionsize_ARG, 0);
} else {
region_size = get_default_region_size(cmd);
if (region_size < 0) {
log_error("Negative regionsize in "
"configuration file is invalid.");
return 0;
}
lp->region_size = region_size;
}
if (lp->region_size % (pagesize >> SECTOR_SHIFT)) {
log_error("Region size (%" PRIu32 ") must be "
"a multiple of machine memory "
"page size (%d).",
lp->region_size, pagesize >> SECTOR_SHIFT);
return 0;
}
if (!is_power_of_2(lp->region_size)) {
log_error("Region size (%" PRIu32
") must be a power of 2.", lp->region_size);
return 0;
}
if (!lp->region_size) {
log_error("Non-zero region size must be supplied.");
return 0;
}
/* FIXME man page says in one place that --type and --mirrors can't be mixed */
if (lp->mirrors_supplied && !lp->mirrors)
/* down-converting to linear/stripe? */
lp->type_str = SEG_TYPE_NAME_STRIPED;
} else if (_raid0_type_requested(lp->type_str) || _striped_type_requested(lp->type_str)) { /* striped or linear or raid0 */
if (arg_from_list_is_set(cmd, "cannot be used with --type raid0 or --type striped or --type linear",
chunksize_ARG, corelog_ARG, mirrors_ARG, mirrorlog_ARG, regionsize_ARG, zero_ARG,
-1))
return_0;
} /* else segtype will default to current type */
}
lp->force = arg_count(cmd, force_ARG);
lp->yes = arg_count(cmd, yes_ARG);
if (!_lvconvert_name_params(lp, cmd, &argc, &argv))
return_0;
lp->pv_count = argc;
lp->pvs = argv;
return 1;
}
static struct poll_functions _lvconvert_mirror_fns = {
.poll_progress = poll_mirror_progress,
.finish_copy = lvconvert_mirror_finish,
};
static struct poll_functions _lvconvert_merge_fns = {
.poll_progress = poll_merge_progress,
.finish_copy = lvconvert_merge_finish,
};
static struct poll_functions _lvconvert_thin_merge_fns = {
.poll_progress = poll_thin_merge_progress,
.finish_copy = lvconvert_merge_finish,
};
static struct poll_operation_id *_create_id(struct cmd_context *cmd,
const char *vg_name,
const char *lv_name,
const char *uuid)
{
struct poll_operation_id *id;
char lv_full_name[NAME_LEN];
if (!vg_name || !lv_name || !uuid) {
log_error(INTERNAL_ERROR "Wrong params for lvconvert _create_id.");
return NULL;
}
if (dm_snprintf(lv_full_name, sizeof(lv_full_name), "%s/%s", vg_name, lv_name) < 0) {
log_error(INTERNAL_ERROR "Name \"%s/%s\" is too long.", vg_name, lv_name);
return NULL;
}
if (!(id = dm_pool_alloc(cmd->mem, sizeof(*id)))) {
log_error("Poll operation ID allocation failed.");
return NULL;
}
if (!(id->display_name = dm_pool_strdup(cmd->mem, lv_full_name)) ||
!(id->lv_name = strchr(id->display_name, '/')) ||
!(id->vg_name = dm_pool_strdup(cmd->mem, vg_name)) ||
!(id->uuid = dm_pool_strdup(cmd->mem, uuid))) {
log_error("Failed to copy one or more poll operation ID members.");
dm_pool_free(cmd->mem, id);
return NULL;
}
id->lv_name++; /* skip over '/' */
return id;
}
static int _lvconvert_poll_by_id(struct cmd_context *cmd, struct poll_operation_id *id,
unsigned background,
int is_merging_origin,
int is_merging_origin_thin)
{
if (test_mode())
return ECMD_PROCESSED;
if (is_merging_origin)
return poll_daemon(cmd, background,
(MERGING | (is_merging_origin_thin ? THIN_VOLUME : SNAPSHOT)),
is_merging_origin_thin ? &_lvconvert_thin_merge_fns : &_lvconvert_merge_fns,
"Merged", id);
else
return poll_daemon(cmd, background, CONVERTING,
&_lvconvert_mirror_fns, "Converted", id);
}
int lvconvert_poll(struct cmd_context *cmd, struct logical_volume *lv,
unsigned background)
{
int r;
struct poll_operation_id *id = _create_id(cmd, lv->vg->name, lv->name, lv->lvid.s);
int is_merging_origin = 0;
int is_merging_origin_thin = 0;
if (!id) {
log_error("Failed to allocate poll identifier for lvconvert.");
return ECMD_FAILED;
}
/* FIXME: check this in polling instead */
if (lv_is_merging_origin(lv)) {
is_merging_origin = 1;
is_merging_origin_thin = seg_is_thin_volume(find_snapshot(lv));
}
r = _lvconvert_poll_by_id(cmd, id, background, is_merging_origin, is_merging_origin_thin);
return r;
}
static int _insert_lvconvert_layer(struct cmd_context *cmd,
struct logical_volume *lv)
{
char format[NAME_LEN], layer_name[NAME_LEN];
int i;
/*
* We would like to give the same number for this layer
* and the newly added mimage.
* However, LV name of newly added mimage is determined *after*
* the LV name of this layer is determined.
*
* So, use generate_lv_name() to generate mimage name first
* and take the number from it.
*/
if (dm_snprintf(format, sizeof(format), "%s_mimage_%%d", lv->name) < 0) {
log_error("lvconvert: layer name creation failed.");
return 0;
}
if (!generate_lv_name(lv->vg, format, layer_name, sizeof(layer_name)) ||
sscanf(layer_name, format, &i) != 1) {
log_error("lvconvert: layer name generation failed.");
return 0;
}
if (dm_snprintf(layer_name, sizeof(layer_name), MIRROR_SYNC_LAYER "_%d", i) < 0) {
log_error("layer name creation failed.");
return 0;
}
if (!insert_layer_for_lv(cmd, lv, 0, layer_name)) {
log_error("Failed to insert resync layer");
return 0;
}
return 1;
}
static int _failed_mirrors_count(struct logical_volume *lv)
{
struct lv_segment *lvseg;
int ret = 0;
unsigned s;
dm_list_iterate_items(lvseg, &lv->segments) {
if (!seg_is_mirrored(lvseg))
return -1;
for (s = 0; s < lvseg->area_count; s++) {
if (seg_type(lvseg, s) == AREA_LV) {
if (is_temporary_mirror_layer(seg_lv(lvseg, s)))
ret += _failed_mirrors_count(seg_lv(lvseg, s));
else if (lv_is_partial(seg_lv(lvseg, s)))
++ ret;
}
else if (seg_type(lvseg, s) == AREA_PV &&
is_missing_pv(seg_pv(lvseg, s)))
++ret;
}
}
return ret;
}
static int _failed_logs_count(struct logical_volume *lv)
{
int ret = 0;
unsigned s;
struct logical_volume *log_lv = first_seg(lv)->log_lv;
if (log_lv && lv_is_partial(log_lv)) {
if (lv_is_mirrored(log_lv))
ret += _failed_mirrors_count(log_lv);
else
ret += 1;
}
for (s = 0; s < first_seg(lv)->area_count; s++) {
if (seg_type(first_seg(lv), s) == AREA_LV &&
is_temporary_mirror_layer(seg_lv(first_seg(lv), s)))
ret += _failed_logs_count(seg_lv(first_seg(lv), s));
}
return ret;
}
static struct dm_list *_failed_pv_list(struct volume_group *vg)
{
struct dm_list *failed_pvs;
struct pv_list *pvl, *new_pvl;
if (!(failed_pvs = dm_pool_alloc(vg->vgmem, sizeof(*failed_pvs)))) {
log_error("Allocation of list of failed_pvs failed.");
return NULL;
}
dm_list_init(failed_pvs);
dm_list_iterate_items(pvl, &vg->pvs) {
if (!is_missing_pv(pvl->pv))
continue;
/*
* Finally, --repair will remove empty PVs.
* But we only want remove these which are output of repair,
* Do not count these which are already empty here.
* FIXME: code should traverse PV in LV not in whole VG.
* FIXME: layer violation? should it depend on vgreduce --removemising?
*/
if (pvl->pv->pe_alloc_count == 0)
continue;
if (!(new_pvl = dm_pool_alloc(vg->vgmem, sizeof(*new_pvl)))) {
log_error("Allocation of failed_pvs list entry failed.");
return NULL;
}
new_pvl->pv = pvl->pv;
dm_list_add(failed_pvs, &new_pvl->list);
}
return failed_pvs;
}
static int _is_partial_lv(struct logical_volume *lv,
void *baton __attribute__((unused)))
{
return lv_is_partial(lv);
}
/*
* Walk down the stacked mirror LV to the original mirror LV.
*/
static struct logical_volume *_original_lv(struct logical_volume *lv)
{
struct logical_volume *next_lv = lv, *tmp_lv;
while ((tmp_lv = find_temporary_mirror(next_lv)))
next_lv = tmp_lv;
return next_lv;
}
static void _lvconvert_mirrors_repair_ask(struct cmd_context *cmd,
int failed_log, int failed_mirrors,
int *replace_log, int *replace_mirrors)
{
const char *leg_policy, *log_policy;
int force = arg_count(cmd, force_ARG);
int yes = arg_count(cmd, yes_ARG);
if (arg_is_set(cmd, usepolicies_ARG)) {
leg_policy = find_config_tree_str(cmd, activation_mirror_image_fault_policy_CFG, NULL);
log_policy = find_config_tree_str(cmd, activation_mirror_log_fault_policy_CFG, NULL);
*replace_mirrors = strcmp(leg_policy, "remove");
*replace_log = strcmp(log_policy, "remove");
return;
}
if (force != PROMPT) {
*replace_log = *replace_mirrors = 0;
return;
}
*replace_log = *replace_mirrors = 1;
if (yes)
return;
if (failed_log &&
yes_no_prompt("Attempt to replace failed mirror log? [y/n]: ") == 'n')
*replace_log = 0;
if (failed_mirrors &&
yes_no_prompt("Attempt to replace failed mirror images "
"(requires full device resync)? [y/n]: ") == 'n')
*replace_mirrors = 0;
}
/*
* _get_log_count
* @lv: the mirror LV
*
* Get the number of on-disk copies of the log.
* 0 = 'core'
* 1 = 'disk'
* 2+ = 'mirrored'
*/
static uint32_t _get_log_count(struct logical_volume *lv)
{
struct logical_volume *log_lv;
log_lv = first_seg(_original_lv(lv))->log_lv;
if (log_lv)
return lv_mirror_count(log_lv);
return 0;
}
static int _lv_update_mirrored_log(struct logical_volume *lv,
struct dm_list *operable_pvs,
int log_count)
{
int old_log_count;
struct logical_volume *log_lv;
/*
* When log_count is 0, mirrored log doesn't need to be
* updated here but it will be removed later.
*/
if (!log_count)
return 1;
log_lv = first_seg(_original_lv(lv))->log_lv;
if (!log_lv || !lv_is_mirrored(log_lv))
return 1;
old_log_count = _get_log_count(lv);
if (old_log_count == log_count)
return 1;
/* Reducing redundancy of the log */
return remove_mirror_images(log_lv, log_count,
is_mirror_image_removable,
operable_pvs, 0U);
}
static int _lv_update_log_type(struct cmd_context *cmd,
struct lvconvert_params *lp,
struct logical_volume *lv,
struct dm_list *operable_pvs,
int log_count)
{
int old_log_count;
uint32_t region_size = (lp) ? lp->region_size :
first_seg(lv)->region_size;
alloc_policy_t alloc = (lp) ? lp->alloc : lv->alloc;
struct logical_volume *original_lv;
struct logical_volume *log_lv;
old_log_count = _get_log_count(lv);
if (old_log_count == log_count)
return 1;
original_lv = _original_lv(lv);
/* Remove an existing log completely */
if (!log_count) {
if (!remove_mirror_log(cmd, original_lv, operable_pvs,
arg_count(cmd, yes_ARG) ||
arg_count(cmd, force_ARG)))
return_0;
return 1;
}
log_lv = first_seg(original_lv)->log_lv;
/* Adding redundancy to the log */
if (old_log_count < log_count) {
region_size = adjusted_mirror_region_size(lv->vg->extent_size,
lv->le_count,
region_size, 0,
vg_is_clustered(lv->vg));
if (!add_mirror_log(cmd, original_lv, log_count,
region_size, operable_pvs, alloc))
return_0;
/*
* FIXME: This simple approach won't work in cluster mirrors,
* but it doesn't matter because we don't support
* mirrored logs in cluster mirrors.
*/
if (old_log_count &&
!lv_update_and_reload(log_lv))
return_0;
return 1;
}
/* Reducing redundancy of the log */
return remove_mirror_images(log_lv, log_count,
is_mirror_image_removable, operable_pvs, 1U);
}
/*
* Reomove missing and empty PVs from VG, if are also in provided list
*/
static void _remove_missing_empty_pv(struct volume_group *vg, struct dm_list *remove_pvs)
{
struct pv_list *pvl, *pvl_vg, *pvlt;
int removed = 0;
if (!remove_pvs)
return;
dm_list_iterate_items(pvl, remove_pvs) {
dm_list_iterate_items_safe(pvl_vg, pvlt, &vg->pvs) {
if (!id_equal(&pvl->pv->id, &pvl_vg->pv->id) ||
!is_missing_pv(pvl_vg->pv) ||
pvl_vg->pv->pe_alloc_count != 0)
continue;
/* FIXME: duplication of vgreduce code, move this to library */
vg->free_count -= pvl_vg->pv->pe_count;
vg->extent_count -= pvl_vg->pv->pe_count;
del_pvl_from_vgs(vg, pvl_vg);
free_pv_fid(pvl_vg->pv);
removed++;
}
}
if (removed) {
if (!vg_write(vg) || !vg_commit(vg)) {
stack;
return;
}
log_warn("%d missing and now unallocated Physical Volumes removed from VG.", removed);
}
}
/*
* _lvconvert_mirrors_parse_params
*
* This function performs the following:
* 1) Gets the old values of mimage and log counts
* 2) Parses the CLI args to find the new desired values
* 3) Adjusts 'lp->mirrors' to the appropriate absolute value.
* (Remember, 'lp->mirrors' is specified in terms of the number of "copies"
* vs. the number of mimages. It can also be a relative value.)
* 4) Sets 'lp->need_polling' if collapsing
* 5) Validates other mirror params
*
* Returns: 1 on success, 0 on error
*/
static int _lvconvert_mirrors_parse_params(struct cmd_context *cmd,
struct logical_volume *lv,
struct lvconvert_params *lp,
uint32_t *old_mimage_count,
uint32_t *old_log_count,
uint32_t *new_mimage_count,
uint32_t *new_log_count)
{
*old_mimage_count = lv_mirror_count(lv);
*old_log_count = _get_log_count(lv);
if (is_lockd_type(lv->vg->lock_type) && lp->keep_mimages) {
/* FIXME: we need to create a lock for the new LV. */
log_error("Unable to split mirrors in VG with lock_type %s", lv->vg->lock_type);
return 0;
}
/*
* Collapsing a stack of mirrors:
*
* If called with no argument, try collapsing the resync layers
*/
if (!lp->mirrors_supplied && !lp->mirrorlog &&
!lp->corelog && !arg_is_set(cmd, regionsize_ARG) &&
!lp->keep_mimages && !lp->repair) {
*new_mimage_count = *old_mimage_count;
*new_log_count = *old_log_count;
if (find_temporary_mirror(lv) || lv_is_converting(lv))
lp->need_polling = 1;
return 1;
}
/*
* Adjusting mimage count?
*/
if (!lp->mirrors_supplied && !lp->keep_mimages)
lp->mirrors = *old_mimage_count;
else if (lp->mirrors_sign == SIGN_PLUS)
lp->mirrors = *old_mimage_count + lp->mirrors;
else if (lp->mirrors_sign == SIGN_MINUS)
lp->mirrors = (*old_mimage_count > lp->mirrors) ?
*old_mimage_count - lp->mirrors: 0;
else
lp->mirrors += 1;
*new_mimage_count = lp->mirrors;
/* Too many mimages? */
if (lp->mirrors > DEFAULT_MIRROR_MAX_IMAGES) {
log_error("Only up to %d images in mirror supported currently.",
DEFAULT_MIRROR_MAX_IMAGES);
return 0;
}
/* Did the user try to subtract more legs than available? */
if (lp->mirrors < 1) {
log_error("Unable to reduce images by specified amount - only %d in %s",
*old_mimage_count, lv->name);
return 0;
}
/*
* FIXME: It would be nice to say what we are adjusting to, but
* I really don't know whether to specify the # of copies or mimages.
*/
if (*old_mimage_count != *new_mimage_count)
log_verbose("Adjusting mirror image count of %s", lv->name);
/*
* Adjust log type
*
* If we are converting from a mirror to another mirror or simply
* changing the log type, we start by assuming they want the log
* type the same and then parse the given args. OTOH, If we are
* converting from linear to mirror, then we start from the default
* position that the user would like a 'disk' log.
*/
*new_log_count = (*old_mimage_count > 1) ? *old_log_count : 1;
if (!lp->corelog && !lp->mirrorlog)
return 1;
*new_log_count = arg_int_value(cmd, mirrorlog_ARG, lp->corelog ? MIRROR_LOG_CORE : DEFAULT_MIRRORLOG);
/*
* No mirrored logs for cluster mirrors until
* log daemon is multi-threaded.
*/
if ((*new_log_count == MIRROR_LOG_MIRRORED) && vg_is_clustered(lv->vg)) {
log_error("Log type, \"mirrored\", is unavailable to cluster mirrors.");
return 0;
}
log_verbose("Setting logging type to %s.", get_mirror_log_name(*new_log_count));
/*
* Region size must not change on existing mirrors
*/
if (arg_is_set(cmd, regionsize_ARG) && lv_is_mirrored(lv) &&
(lp->region_size != first_seg(lv)->region_size)) {
log_error("Mirror log region size cannot be changed on "
"an existing mirror.");
return 0;
}
/*
* For the most part, we cannot handle multi-segment mirrors. Bail out
* early if we have encountered one.
*/
if (lv_is_mirrored(lv) && dm_list_size(&lv->segments) != 1) {
log_error("Logical volume %s has multiple "
"mirror segments.", display_lvname(lv));
return 0;
}
return 1;
}
/*
* _lvconvert_mirrors_aux
*
* Add/remove mirror images and adjust log type. 'operable_pvs'
* are the set of PVs open to removal or allocation - depending
* on the operation being performed.
*/
static int _lvconvert_mirrors_aux(struct cmd_context *cmd,
struct logical_volume *lv,
struct lvconvert_params *lp,
struct dm_list *operable_pvs,
uint32_t new_mimage_count,
uint32_t new_log_count)
{
uint32_t region_size;
struct lv_segment *seg = first_seg(lv);
struct logical_volume *layer_lv;
uint32_t old_mimage_count = lv_mirror_count(lv);
uint32_t old_log_count = _get_log_count(lv);
if ((lp->mirrors == 1) && !lv_is_mirrored(lv)) {
log_warn("Logical volume %s is already not mirrored.",
display_lvname(lv));
return 1;
}
region_size = adjusted_mirror_region_size(lv->vg->extent_size,
lv->le_count,
lp->region_size ? : seg->region_size, 0,
vg_is_clustered(lv->vg));
if (!operable_pvs)
operable_pvs = lp->pvh;
/*
* Up-convert from linear to mirror
*/
if (!lv_is_mirrored(lv)) {
/* FIXME Share code with lvcreate */
/*
* FIXME should we give not only lp->pvh, but also all PVs
* currently taken by the mirror? Would make more sense from
* user perspective.
*/
if (!lv_add_mirrors(cmd, lv, new_mimage_count - 1, lp->stripes,
lp->stripe_size, region_size, new_log_count, operable_pvs,
lp->alloc, MIRROR_BY_LV))
return_0;
if (lp->wait_completion)
lp->need_polling = 1;
goto out;
}
/*
* Up-convert m-way mirror to n-way mirror
*/
if (new_mimage_count > old_mimage_count) {
if (lv_is_not_synced(lv)) {
log_error("Can't add mirror to out-of-sync mirrored "
"LV: use lvchange --resync first.");
return 0;
}
/*
* We allow snapshots of mirrors, but for now, we
* do not allow up converting mirrors that are under
* snapshots. The layering logic is somewhat complex,
* and preliminary test show that the conversion can't
* seem to get the correct %'age of completion.
*/
if (lv_is_origin(lv)) {
log_error("Can't add additional mirror images to "
"mirror %s which is under snapshots.",
display_lvname(lv));
return 0;
}
/*
* Is there already a convert in progress? We do not
* currently allow more than one.
*/
if (find_temporary_mirror(lv) || lv_is_converting(lv)) {
log_error("%s is already being converted. Unable to start another conversion.",
display_lvname(lv));
return 0;
}
/*
* Log addition/removal should be done before the layer
* insertion to make the end result consistent with
* linear-to-mirror conversion.
*/
if (!_lv_update_log_type(cmd, lp, lv,
operable_pvs, new_log_count))
return_0;
/* Insert a temporary layer for syncing,
* only if the original lv is using disk log. */
if (seg->log_lv && !_insert_lvconvert_layer(cmd, lv)) {
log_error("Failed to insert resync layer.");
return 0;
}
/* FIXME: can't have multiple mlogs. force corelog. */
if (!lv_add_mirrors(cmd, lv,
new_mimage_count - old_mimage_count,
lp->stripes, lp->stripe_size,
region_size, 0U, operable_pvs, lp->alloc,
MIRROR_BY_LV)) {
layer_lv = seg_lv(first_seg(lv), 0);
if (!remove_layer_from_lv(lv, layer_lv) ||
!deactivate_lv(cmd, layer_lv) ||
!lv_remove(layer_lv) ||
!vg_write(lv->vg) || !vg_commit(lv->vg)) {
log_error("ABORTING: Failed to remove "
"temporary mirror layer %s.",
display_lvname(layer_lv));
log_error("Manual cleanup with vgcfgrestore "
"and dmsetup may be required.");
return 0;
}
return_0;
}
if (seg->log_lv)
lv->status |= CONVERTING;
lp->need_polling = 1;
goto out_skip_log_convert;
}
/*
* Down-convert (reduce # of mimages).
*/
if (new_mimage_count < old_mimage_count) {
uint32_t nmc = old_mimage_count - new_mimage_count;
uint32_t nlc = (!new_log_count || lp->mirrors == 1) ? 1U : 0U;
/* FIXME: Why did nlc used to be calculated that way? */
/* Reduce number of mirrors */
if (lp->keep_mimages) {
if (lp->track_changes) {
log_error("--trackchanges is not available "
"to 'mirror' segment type.");
return 0;
}
if (!lv_split_mirror_images(lv, lp->lv_split_name,
nmc, operable_pvs))
return_0;
} else if (!lv_remove_mirrors(cmd, lv, nmc, nlc,
is_mirror_image_removable, operable_pvs, 0))
return_0;
goto out; /* Just in case someone puts code between */
}
out:
/*
* Converting the log type
*/
if (lv_is_mirrored(lv) && (old_log_count != new_log_count)) {
if (!_lv_update_log_type(cmd, lp, lv,
operable_pvs, new_log_count))
return_0;
}
out_skip_log_convert:
if (!lv_update_and_reload(lv))
return_0;
return 1;
}
int mirror_remove_missing(struct cmd_context *cmd,
struct logical_volume *lv, int force)
{
struct dm_list *failed_pvs;
int log_count = _get_log_count(lv) - _failed_logs_count(lv);
if (!(failed_pvs = _failed_pv_list(lv->vg)))
return_0;
if (force && _failed_mirrors_count(lv) == (int)lv_mirror_count(lv)) {
log_error("No usable images left in %s.", display_lvname(lv));
return lv_remove_with_dependencies(cmd, lv, DONT_PROMPT, 0);
}
/*
* We must adjust the log first, or the entire mirror
* will get stuck during a suspend.
*/
if (!_lv_update_mirrored_log(lv, failed_pvs, log_count))
return_0;
if (_failed_mirrors_count(lv) > 0 &&
!lv_remove_mirrors(cmd, lv, _failed_mirrors_count(lv),
log_count ? 0U : 1U,
_is_partial_lv, NULL, 0))
return_0;
if (lv_is_mirrored(lv) &&
!_lv_update_log_type(cmd, NULL, lv, failed_pvs, log_count))
return_0;
if (!lv_update_and_reload(lv))
return_0;
return 1;
}
/*
* _lvconvert_mirrors_repair
*
* This function operates in two phases. First, all of the bad
* devices are removed from the mirror. Then, if desired by the
* user, the devices are replaced.
*
* 'old_mimage_count' and 'old_log_count' are there so we know
* what to convert to after the removal of devices.
*/
static int _lvconvert_mirrors_repair(struct cmd_context *cmd,
struct logical_volume *lv,
struct lvconvert_params *lp)
{
int failed_logs;
int failed_mimages;
int replace_logs = 0;
int replace_mimages = 0;
uint32_t log_count;
uint32_t original_mimages = lv_mirror_count(lv);
uint32_t original_logs = _get_log_count(lv);
cmd->handles_missing_pvs = 1;
cmd->partial_activation = 1;
lp->need_polling = 0;
lv_check_transient(lv); /* TODO check this in lib for all commands? */
if (!lv_is_partial(lv)) {
log_print_unless_silent("Volume %s is consistent. Nothing to repair.",
display_lvname(lv));
return 1;
}
failed_mimages = _failed_mirrors_count(lv);
failed_logs = _failed_logs_count(lv);
/* Retain existing region size in case we need it later */
if (!lp->region_size)
lp->region_size = first_seg(lv)->region_size;
if (!mirror_remove_missing(cmd, lv, 0))
return_0;
if (failed_mimages)
log_print_unless_silent("Mirror status: %d of %d images failed.",
failed_mimages, original_mimages);
/*
* Count the failed log devices
*/
if (failed_logs)
log_print_unless_silent("Mirror log status: %d of %d images failed.",
failed_logs, original_logs);
/*
* Find out our policies
*/
_lvconvert_mirrors_repair_ask(cmd, failed_logs, failed_mimages,
&replace_logs, &replace_mimages);
/*
* Second phase - replace faulty devices
*/
lp->mirrors = replace_mimages ? original_mimages : (original_mimages - failed_mimages);
/*
* It does not make sense to replace the log if the volume is no longer
* a mirror.
*/
if (lp->mirrors == 1)
replace_logs = 0;
log_count = replace_logs ? original_logs : (original_logs - failed_logs);
while (replace_mimages || replace_logs) {
log_warn("Trying to up-convert to %d images, %d logs.", lp->mirrors, log_count);
if (_lvconvert_mirrors_aux(cmd, lv, lp, NULL,
lp->mirrors, log_count))
break;
if (lp->mirrors > 2)
--lp->mirrors;
else if (log_count > 0)
--log_count;
else
break; /* nowhere to go, anymore... */
}
if (replace_mimages && lv_mirror_count(lv) != original_mimages)
log_warn("WARNING: Failed to replace %d of %d images in volume %s.",
original_mimages - lv_mirror_count(lv), original_mimages,
display_lvname(lv));
if (replace_logs && _get_log_count(lv) != original_logs)
log_warn("WARNING: Failed to replace %d of %d logs in volume %s.",
original_logs - _get_log_count(lv), original_logs,
display_lvname(lv));
/* if (!arg_is_set(cmd, use_policies_ARG) && (lp->mirrors != old_mimage_count
|| log_count != old_log_count))
return 0; */
return 1;
}
static int _lvconvert_validate_thin(struct logical_volume *lv,
struct lvconvert_params *lp)
{
if (!lv_is_thin_pool(lv) && !lv_is_thin_volume(lv))
return 1;
log_error("Converting thin%s segment type for %s to %s is not supported.",
lv_is_thin_pool(lv) ? " pool" : "",
display_lvname(lv), lp->segtype->name);
if (lv_is_thin_volume(lv))
return 0;
/* Give advice for thin pool conversion */
log_error("For pool data volume conversion use %s.",
display_lvname(seg_lv(first_seg(lv), 0)));
log_error("For pool metadata volume conversion use %s.",
display_lvname(first_seg(lv)->metadata_lv));
return 0;
}
/*
* _lvconvert_mirrors
*
* Determine what is being done. Are we doing a conversion, repair, or
* collapsing a stack? Once determined, call helper functions.
*/
static int _lvconvert_mirrors(struct cmd_context *cmd,
struct logical_volume *lv,
struct lvconvert_params *lp)
{
uint32_t old_mimage_count;
uint32_t old_log_count;
uint32_t new_mimage_count;
uint32_t new_log_count;
if ((lp->corelog || lp->mirrorlog) && *lp->type_str && strcmp(lp->type_str, SEG_TYPE_NAME_MIRROR)) {
log_error("--corelog and --mirrorlog are only compatible with mirror devices.");
return 0;
}
if (lp->merge_mirror) {
log_error("Unable to merge mirror images of segment type 'mirror'.");
return 0;
}
if (!_lvconvert_validate_thin(lv, lp))
return_0;
if (lv_is_thin_type(lv)) {
log_error("Mirror segment type cannot be used for thinpool%s.\n"
"Try \"%s\" segment type instead.",
lv_is_thin_pool_data(lv) ? "s" : " metadata",
SEG_TYPE_NAME_RAID1);
return 0;
}
if (lv_is_cache_type(lv)) {
log_error("Mirrors are not yet supported on cache LVs %s.",
display_lvname(lv));
return 0;
}
if (_linear_type_requested(lp->type_str)) {
if (arg_is_set(cmd, mirrors_ARG) && (arg_uint_value(cmd, mirrors_ARG, 0) != 0)) {
log_error("Cannot specify mirrors with linear type.");
return 0;
}
lp->mirrors_supplied = 1;
lp->mirrors = 0;
}
/* Adjust mimage and/or log count */
if (!_lvconvert_mirrors_parse_params(cmd, lv, lp,
&old_mimage_count, &old_log_count,
&new_mimage_count, &new_log_count))
return_0;
if (((old_mimage_count < new_mimage_count && old_log_count > new_log_count) ||
(old_mimage_count > new_mimage_count && old_log_count < new_log_count)) &&
lp->pv_count) {
log_error("Cannot both allocate and free extents when "
"specifying physical volumes to use.");
log_error("Please specify the operation in two steps.");
return 0;
}
/* Nothing to do? (Probably finishing collapse.) */
if ((old_mimage_count == new_mimage_count) &&
(old_log_count == new_log_count) && !lp->repair)
return 1;
if (lp->repair)
return _lvconvert_mirrors_repair(cmd, lv, lp);
if (!_lvconvert_mirrors_aux(cmd, lv, lp, NULL,
new_mimage_count, new_log_count))
return_0;
backup(lv->vg);
if (!lp->need_polling)
log_print_unless_silent("Logical volume %s converted.",
display_lvname(lv));
else
log_print_unless_silent("Logical volume %s being converted.",
display_lvname(lv));
return 1;
}
static int _is_valid_raid_conversion(const struct segment_type *from_segtype,
const struct segment_type *to_segtype)
{
if (from_segtype == to_segtype)
return 1;
/* Support raid0 <-> striped conversions */
if (segtype_is_striped(from_segtype) && segtype_is_striped(to_segtype))
return 1;
if (!segtype_is_raid(from_segtype) && !segtype_is_raid(to_segtype))
return_0; /* Not converting to or from RAID? */
return 1;
}
static void _lvconvert_raid_repair_ask(struct cmd_context *cmd,
struct lvconvert_params *lp,
int *replace_dev)
{
const char *dev_policy;
*replace_dev = 1;
if (arg_is_set(cmd, usepolicies_ARG)) {
dev_policy = find_config_tree_str(cmd, activation_raid_fault_policy_CFG, NULL);
if (!strcmp(dev_policy, "allocate") ||
!strcmp(dev_policy, "replace"))
return;
/* else if (!strcmp(dev_policy, "anything_else")) -- no replace */
*replace_dev = 0;
return;
}
if (!lp->yes &&
yes_no_prompt("Attempt to replace failed RAID images "
"(requires full device resync)? [y/n]: ") == 'n') {
*replace_dev = 0;
}
}
/* Check for dm-raid target supporting raid4 conversion properly. */
static int _raid4_conversion_supported(struct logical_volume *lv, struct lvconvert_params *lp)
{
int ret = 1;
struct lv_segment *seg = first_seg(lv);
if (seg_is_raid4(seg))
ret = raid4_is_supported(lv->vg->cmd, seg->segtype);
else if (segtype_is_raid4(lp->segtype))
ret = raid4_is_supported(lv->vg->cmd, lp->segtype);
if (ret)
return 1;
log_error("Cannot convert %s LV %s to %s.",
lvseg_name(seg), display_lvname(lv), lp->segtype->name);
return 0;
}
static int _lvconvert_raid(struct logical_volume *lv, struct lvconvert_params *lp)
{
int replace = 0, image_count = 0;
struct dm_list *failed_pvs;
struct cmd_context *cmd = lv->vg->cmd;
struct lv_segment *seg = first_seg(lv);
if (_linear_type_requested(lp->type_str)) {
if (arg_is_set(cmd, mirrors_ARG) && (arg_uint_value(cmd, mirrors_ARG, 0) != 0)) {
log_error("Cannot specify mirrors with linear type.");
return 0;
}
lp->mirrors_supplied = 1;
lp->mirrors = 0;
}
/* Can only change image count for raid1 and linear */
if (lp->mirrors_supplied) {
if (_raid0_type_requested(lp->type_str)) {
log_error("--mirrors/-m is not compatible with conversion to %s.",
lp->type_str);
return 0;
}
if (!seg_is_mirrored(seg) && !seg_is_linear(seg)) {
log_error("--mirrors/-m is not compatible with %s.",
lvseg_name(seg));
return 0;
}
if (seg_is_raid10(seg)) {
log_error("--mirrors/-m cannot be changed with %s.",
lvseg_name(seg));
return 0;
}
}
if (!_lvconvert_validate_thin(lv, lp))
return_0;
if (!_is_valid_raid_conversion(seg->segtype, lp->segtype))
goto try_new_takeover_or_reshape;
if (seg_is_linear(seg) && !lp->merge_mirror && !lp->mirrors_supplied) {
if (_raid0_type_requested(lp->type_str)) {
log_error("Linear LV %s cannot be converted to %s.",
display_lvname(lv), lp->type_str);
return 0;
} else if (!strcmp(lp->type_str, SEG_TYPE_NAME_RAID1)) {
log_error("Raid conversions of LV %s require -m/--mirrors.",
display_lvname(lv));
return 0;
}
goto try_new_takeover_or_reshape;
}
/* Change number of RAID1 images */
if (lp->mirrors_supplied || lp->keep_mimages) {
image_count = lv_raid_image_count(lv);
if (lp->mirrors_sign == SIGN_PLUS)
image_count += lp->mirrors;
else if (lp->mirrors_sign == SIGN_MINUS)
image_count -= lp->mirrors;
else
image_count = lp->mirrors + 1;
if (image_count < 1) {
log_error("Unable to %s images by specified amount.",
lp->keep_mimages ? "split" : "reduce");
return 0;
}
/* --trackchanges requires --splitmirrors which always has SIGN_MINUS */
if (lp->track_changes && lp->mirrors != 1) {
log_error("Exactly one image must be split off from %s when tracking changes.",
display_lvname(lv));
return 0;
}
}
if ((lp->corelog || lp->mirrorlog) && strcmp(lp->type_str, SEG_TYPE_NAME_MIRROR)) {
log_error("--corelog and --mirrorlog are only compatible with mirror devices");
return 0;
}
if (lp->merge_mirror)
return lv_raid_merge(lv);
if (lp->track_changes)
return lv_raid_split_and_track(lv, lp->pvh);
if (lp->keep_mimages)
return lv_raid_split(lv, lp->lv_split_name, image_count, lp->pvh);
if (lp->mirrors_supplied) {
if (!*lp->type_str || !strcmp(lp->type_str, SEG_TYPE_NAME_RAID1) || !strcmp(lp->type_str, SEG_TYPE_NAME_LINEAR) ||
(!strcmp(lp->type_str, SEG_TYPE_NAME_STRIPED) && image_count == 1)) {
if (image_count > DEFAULT_RAID1_MAX_IMAGES) {
log_error("Only up to %u mirrors in %s LV %s supported currently.",
DEFAULT_RAID1_MAX_IMAGES, lp->segtype->name, display_lvname(lv));
return 0;
}
if (!lv_raid_change_image_count(lv, image_count, lp->pvh))
return_0;
log_print_unless_silent("Logical volume %s successfully converted.",
display_lvname(lv));
return 1;
}
goto try_new_takeover_or_reshape;
} else if (!lp->repair && !lp->replace && !arg_is_set(cmd, regionsize_ARG) && (!*lp->type_str || seg->segtype == lp->segtype)) {
log_error("Conversion operation not yet supported.");
return 0;
}
if ((seg_is_linear(seg) || seg_is_striped(seg) || seg_is_mirrored(seg) || lv_is_raid(lv)) &&
((lp->type_str && lp->type_str[0]) || arg_is_set(cmd, regionsize_ARG))) {
/* Activation is required later which precludes existing supported raid0 segment */
if ((seg_is_any_raid0(seg) || segtype_is_any_raid0(lp->segtype)) &&
!(lp->target_attr & RAID_FEATURE_RAID0)) {
log_error("RAID module does not support RAID0.");
return 0;
}
/* Activation is required later which precludes existing supported raid4 segment */
if (!_raid4_conversion_supported(lv, lp))
return_0;
/* Activation is required later which precludes existing supported raid10 segment */
if ((seg_is_raid10(seg) || segtype_is_raid10(lp->segtype)) &&
!(lp->target_attr & RAID_FEATURE_RAID10)) {
log_error("RAID module does not support RAID10.");
return 0;
}
if (!arg_is_set(cmd, stripes_long_ARG))
lp->stripes = 0;
/*
* FIXME: arg_is_set() workaround for region size until the cli validation patches got merged;
* i needs "--type raid*", because lp->region_size isn't set w/o it
*/
if (!lv_raid_convert(lv, lp->segtype, lp->yes, lp->force, lp->stripes, lp->stripe_size_supplied, lp->stripe_size,
arg_is_set(cmd, regionsize_ARG) ? lp->region_size : 0, lp->pvh))
return_0;
log_print_unless_silent("Logical volume %s successfully converted.",
display_lvname(lv));
return 1;
}
if (lp->replace)
return lv_raid_replace(lv, lp->force, lp->replace_pvh, lp->pvh);
if (lp->repair) {
if (!lv_is_active_exclusive_locally(lv_lock_holder(lv))) {
log_error("%s must be active %sto perform this operation.",
display_lvname(lv),
vg_is_clustered(lv->vg) ?
"exclusive locally " : "");
return 0;
}
if (seg_is_striped(seg)) {
log_error("Cannot repair LV %s of type raid0.",
display_lvname(lv));
return 0;
}
if (!lv_check_transient(lv)) /* TODO check this in lib for all commands? */
stack; /* TODO: break here upon fail or always try to fix it? */
_lvconvert_raid_repair_ask(cmd, lp, &replace);
if (replace) {
if (!(failed_pvs = _failed_pv_list(lv->vg)))
return_0;
if (!lv_raid_replace(lv, lp->force, failed_pvs, lp->pvh)) {
log_error("Failed to replace faulty devices in %s.",
display_lvname(lv));
return 0;
}
log_print_unless_silent("Faulty devices in %s successfully replaced.",
display_lvname(lv));
return 1;
}
/* "warn" if policy not set to replace */
if (arg_is_set(cmd, usepolicies_ARG))
log_warn("Use 'lvconvert --repair %s' to replace "
"failed device.", display_lvname(lv));
return 1;
}
try_new_takeover_or_reshape:
if (!_raid4_conversion_supported(lv, lp))
return 0;
/* FIXME This needs changing globally. */
if (!arg_is_set(cmd, stripes_long_ARG))
lp->stripes = 0;
/* Only let raid4 through for now. */
if (lp->type_str && lp->type_str[0] && lp->segtype != seg->segtype &&
((seg_is_raid4(seg) && seg_is_striped(lp) && lp->stripes > 1) ||
(seg_is_striped(seg) && seg->area_count > 1 && seg_is_raid4(lp)))) {
/*
* FIXME: arg_is_set() workaround for region size until the cli validation patches got merged;
* i needs "--type raid*", because lp->region_size isn't set w/o it
*/
if (!lv_raid_convert(lv, lp->segtype, lp->yes, lp->force, lp->stripes, lp->stripe_size_supplied, lp->stripe_size,
arg_is_set(cmd, regionsize_ARG) ? lp->region_size : 0, lp->pvh))
return_0;
log_print_unless_silent("Logical volume %s successfully converted.",
display_lvname(lv));
return 1;
}
log_error("Conversion operation not yet supported.");
return 0;
}
static int _lvconvert_splitsnapshot(struct cmd_context *cmd, struct logical_volume *cow,
struct lvconvert_params *lp)
{
struct volume_group *vg = cow->vg;
const char *cow_name = display_lvname(cow);
if (!lv_is_cow(cow)) {
log_error("%s is not a snapshot.", cow_name);
return 0;
}
if (lv_is_origin(cow) || lv_is_external_origin(cow)) {
log_error("Unable to split LV %s that is a snapshot origin.", cow_name);
return 0;
}
if (lv_is_merging_cow(cow)) {
log_error("Unable to split off snapshot %s being merged into its origin.", cow_name);
return 0;
}
if (lv_is_virtual_origin(origin_from_cow(cow))) {
log_error("Unable to split off snapshot %s with virtual origin.", cow_name);
return 0;
}
if (lv_is_thin_pool(cow) || lv_is_pool_metadata_spare(cow)) {
log_error("Unable to split off LV %s needed by thin volume(s).", cow_name);
return 0;
}
if (!(vg->fid->fmt->features & FMT_MDAS)) {
log_error("Unable to split off snapshot %s using old LVM1-style metadata.", cow_name);
return 0;
}
if (is_lockd_type(vg->lock_type)) {
/* FIXME: we need to create a lock for the new LV. */
log_error("Unable to split snapshots in VG with lock_type %s.", vg->lock_type);
return 0;
}
if (!vg_check_status(vg, LVM_WRITE))
return_0;
if (lv_is_pvmove(cow) || lv_is_mirror_type(cow) || lv_is_raid_type(cow) || lv_is_thin_type(cow)) {
log_error("LV %s type is unsupported with --splitsnapshot.", display_lvname(cow));
return 0;
}
if (lv_is_active_locally(cow)) {
if (!lv_check_not_in_use(cow, 1))
return_0;
if ((lp->force == PROMPT) && !lp->yes &&
lv_is_visible(cow) &&
lv_is_active(cow)) {
if (yes_no_prompt("Do you really want to split off active "
"logical volume %s? [y/n]: ", display_lvname(cow)) == 'n') {
log_error("Logical volume %s not split.", display_lvname(cow));
return 0;
}
}
}
if (!archive(vg))
return_0;
log_verbose("Splitting snapshot %s from its origin.", display_lvname(cow));
if (!vg_remove_snapshot(cow))
return_0;
backup(vg);
log_print_unless_silent("Logical Volume %s split from its origin.", display_lvname(cow));
return 1;
}
static int _lvconvert_split_cached(struct cmd_context *cmd,
struct logical_volume *lv)
{
struct logical_volume *cache_pool_lv = first_seg(lv)->pool_lv;
log_debug("Detaching cache pool %s from cached LV %s.",
display_lvname(cache_pool_lv), display_lvname(lv));
if (!archive(lv->vg))
return_0;
if (!lv_cache_remove(lv))
return_0;
if (!vg_write(lv->vg) || !vg_commit(lv->vg))
return_0;
backup(lv->vg);
log_print_unless_silent("Logical volume %s is not cached and cache pool %s is unused.",
display_lvname(lv), display_lvname(cache_pool_lv));
return 1;
}
static int _lvconvert_uncache(struct cmd_context *cmd,
struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct lv_segment *seg;
struct logical_volume *remove_lv;
if (lv_is_thin_pool(lv))
lv = seg_lv(first_seg(lv), 0); /* cached _tdata ? */
if (!lv_is_cache(lv)) {
log_error("Cannot uncache non-cached logical volume %s.",
display_lvname(lv));
return 0;
}
seg = first_seg(lv);
if (lv_is_partial(seg_lv(seg, 0))) {
log_warn("WARNING: Cache origin logical volume %s is missing.",
display_lvname(seg_lv(seg, 0)));
remove_lv = lv; /* When origin is missing, drop everything */
} else
remove_lv = seg->pool_lv;
if (lv_is_partial(seg_lv(first_seg(seg->pool_lv), 0)))
log_warn("WARNING: Cache pool data logical volume %s is missing.",
display_lvname(seg_lv(first_seg(seg->pool_lv), 0)));
if (lv_is_partial(first_seg(seg->pool_lv)->metadata_lv))
log_warn("WARNING: Cache pool metadata logical volume %s is missing.",
display_lvname(first_seg(seg->pool_lv)->metadata_lv));
/* TODO: Check for failed cache as well to get prompting? */
if (lv_is_partial(lv)) {
if (first_seg(seg->pool_lv)->cache_mode != CACHE_MODE_WRITETHROUGH) {
if (!lp->force) {
log_error("Conversion aborted.");
log_error("Cannot uncache writethrough cache volume %s without --force.",
display_lvname(lv));
return 0;
}
log_warn("WARNING: Uncaching of partially missing writethrough cache volume %s might destroy your data.",
display_lvname(lv));
}
if (!lp->yes &&
yes_no_prompt("Do you really want to uncache %s with missing LVs? [y/n]: ",
display_lvname(lv)) == 'n') {
log_error("Conversion aborted.");
return 0;
}
cmd->handles_missing_pvs = 1;
cmd->partial_activation = 1;
}
if (lvremove_single(cmd, remove_lv, NULL) != ECMD_PROCESSED)
return_0;
if (remove_lv != lv)
log_print_unless_silent("Logical volume %s is not cached.", display_lvname(lv));
return 1;
}
static int _lvconvert_snapshot(struct cmd_context *cmd,
struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct logical_volume *org;
const char *snap_name = display_lvname(lv);
if (lv_is_cache_type(lv)) {
log_error("Snapshots are not yet supported with cache type LVs %s.",
snap_name);
return 0;
}
if (lv_is_mirrored(lv)) {
log_error("Unable to convert mirrored LV %s into a snapshot.", snap_name);
return 0;
}
if (lv_is_origin(lv)) {
/* Unsupported stack */
log_error("Unable to convert origin %s into a snapshot.", snap_name);
return 0;
}
if (lv_is_pool(lv)) {
log_error("Unable to convert pool LVs %s into a snapshot.", snap_name);
return 0;
}
if (!(org = find_lv(lv->vg, lp->origin_name))) {
log_error("Couldn't find origin volume %s in Volume group %s.",
lp->origin_name, lv->vg->name);
return 0;
}
if (org == lv) {
log_error("Unable to use %s as both snapshot and origin.", snap_name);
return 0;
}
if (!cow_has_min_chunks(lv->vg, lv->le_count, lp->chunk_size))
return_0;
if (lv_is_locked(org) ||
(lv_is_cache_type(org) && !lv_is_cache(org)) ||
lv_is_thin_type(org) ||
lv_is_pvmove(org) ||
lv_is_mirrored(org) ||
lv_is_cow(org)) {
log_error("Unable to convert an LV into a snapshot of a %s LV.",
lv_is_locked(org) ? "locked" :
lv_is_cache_type(org) ? "cache type" :
lv_is_thin_type(org) ? "thin type" :
lv_is_pvmove(org) ? "pvmove" :
lv_is_mirrored(org) ? "mirrored" :
"snapshot");
return 0;
}
log_warn("WARNING: Converting logical volume %s to snapshot exception store.",
snap_name);
log_warn("THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)");
if (!lp->yes &&
yes_no_prompt("Do you really want to convert %s? [y/n]: ",
snap_name) == 'n') {
log_error("Conversion aborted.");
return 0;
}
if (!deactivate_lv(cmd, lv)) {
log_error("Couldn't deactivate logical volume %s.", snap_name);
return 0;
}
if (!lp->zero || !(lv->status & LVM_WRITE))
log_warn("WARNING: %s not zeroed.", snap_name);
else {
lv->status |= LV_TEMPORARY;
if (!activate_lv_local(cmd, lv) ||
!wipe_lv(lv, (struct wipe_params) { .do_zero = 1 })) {
log_error("Aborting. Failed to wipe snapshot exception store.");
return 0;
}
lv->status &= ~LV_TEMPORARY;
/* Deactivates cleared metadata LV */
if (!deactivate_lv_local(lv->vg->cmd, lv)) {
log_error("Failed to deactivate zeroed snapshot exception store.");
return 0;
}
}
if (!archive(lv->vg))
return_0;
if (!vg_add_snapshot(org, lv, NULL, org->le_count, lp->chunk_size)) {
log_error("Couldn't create snapshot.");
return 0;
}
/* store vg on disk(s) */
if (!lv_update_and_reload(org))
return_0;
log_print_unless_silent("Logical volume %s converted to snapshot.", snap_name);
return 1;
}
static int _lvconvert_merge_old_snapshot(struct cmd_context *cmd,
struct logical_volume *lv,
struct lvconvert_params *lp)
{
int merge_on_activate = 0;
struct logical_volume *origin = origin_from_cow(lv);
struct lv_segment *snap_seg = find_snapshot(lv);
struct lvinfo info;
dm_percent_t snap_percent;
/* Check if merge is possible */
if (!lv_is_cow(lv)) {
log_error("\"%s\" is not a mergeable logical volume.",
lv->name);
return 0;
}
if (lv_is_merging_cow(lv)) {
log_error("Snapshot %s is already merging.", lv->name);
return 0;
}
if (lv_is_merging_origin(origin)) {
log_error("Snapshot %s is already merging into the origin.",
find_snapshot(origin)->cow->name);
return 0;
}
if (lv_is_virtual_origin(origin)) {
log_error("Snapshot %s has virtual origin.", lv->name);
return 0;
}
if (lv_is_external_origin(origin_from_cow(lv))) {
log_error("Cannot merge snapshot \"%s\" into "
"the read-only external origin \"%s\".",
lv->name, origin_from_cow(lv)->name);
return 0;
}
/* FIXME: test when snapshot is remotely active */
if (lv_info(cmd, lv, 0, &info, 1, 0)
&& info.exists && info.live_table &&
(!lv_snapshot_percent(lv, &snap_percent) ||
snap_percent == DM_PERCENT_INVALID)) {
log_error("Unable to merge invalidated snapshot LV \"%s\".",
lv->name);
return 0;
}
if (snap_seg->segtype->ops->target_present &&
!snap_seg->segtype->ops->target_present(cmd, snap_seg, NULL)) {
log_error("Can't initialize snapshot merge. "
"Missing support in kernel?");
return 0;
}
if (!archive(lv->vg))
return_0;
/*
* Prevent merge with open device(s) as it would likely lead
* to application/filesystem failure. Merge on origin's next
* activation if either the origin or snapshot LV are currently
* open.
*
* FIXME testing open_count is racey; snapshot-merge target's
* constructor and DM should prevent appropriate devices from
* being open.
*/
if (lv_is_active_locally(origin)) {
if (!lv_check_not_in_use(origin, 0)) {
log_print_unless_silent("Can't merge until origin volume is closed.");
merge_on_activate = 1;
} else if (!lv_check_not_in_use(lv, 0)) {
log_print_unless_silent("Can't merge until snapshot is closed.");
merge_on_activate = 1;
}
} else if (vg_is_clustered(origin->vg) && lv_is_active(origin)) {
/* When it's active somewhere else */
log_print_unless_silent("Can't check whether remotely active snapshot is open.");
merge_on_activate = 1;
}
init_snapshot_merge(snap_seg, origin);
if (merge_on_activate) {
/* Store and commit vg but skip starting the merge */
if (!vg_write(lv->vg) || !vg_commit(lv->vg))
return_0;
backup(lv->vg);
} else {
/* Perform merge */
if (!lv_update_and_reload(origin))
return_0;
if (lv_has_target_type(origin->vg->vgmem, origin, NULL,
TARGET_NAME_SNAPSHOT_MERGE)) {
lp->need_polling = 1;
lp->lv_to_poll = origin;
} else
/* Race during table reload prevented merging */
merge_on_activate = 1;
}
if (merge_on_activate)
log_print_unless_silent("Merging of snapshot %s will occur on "
"next activation of %s.",
display_lvname(lv), display_lvname(origin));
else
log_print_unless_silent("Merging of volume %s started.",
display_lvname(lv));
return 1;
}
static int _lvconvert_merge_thin_snapshot(struct cmd_context *cmd,
struct logical_volume *lv,
struct lvconvert_params *lp)
{
int origin_is_active = 0, r = 0;
struct lv_segment *snap_seg = first_seg(lv);
struct logical_volume *origin = snap_seg->origin;
if (!origin) {
log_error("%s is not a mergeable logical volume.",
display_lvname(lv));
return 0;
}
/* Check if merge is possible */
if (lv_is_merging_origin(origin)) {
log_error("Snapshot %s is already merging into the origin.",
display_lvname(find_snapshot(origin)->lv));
return 0;
}
if (lv_is_external_origin(origin)) {
if (!(origin = origin_from_cow(lv)))
log_error(INTERNAL_ERROR "%s is missing origin.",
display_lvname(lv));
else
log_error("%s is read-only external origin %s.",
display_lvname(lv), display_lvname(origin));
return 0;
}
if (lv_is_origin(origin)) {
log_error("Merging into the old snapshot origin %s is not supported.",
display_lvname(origin));
return 0;
}
if (!archive(lv->vg))
return_0;
/*
* Prevent merge with open device(s) as it would likely lead
* to application/filesystem failure. Merge on origin's next
* activation if either the origin or snapshot LV can't be
* deactivated.
*/
if (!deactivate_lv(cmd, lv))
log_print_unless_silent("Delaying merge since snapshot is open.");
else if ((origin_is_active = lv_is_active(origin)) &&
!deactivate_lv(cmd, origin))
log_print_unless_silent("Delaying merge since origin volume is open.");
else {
/*
* Both thin snapshot and origin are inactive,
* replace the origin LV with its snapshot LV.
*/
if (!thin_merge_finish(cmd, origin, lv))
goto_out;
if (origin_is_active && !activate_lv(cmd, lv)) {
log_error("Failed to reactivate origin %s.",
display_lvname(lv));
goto out;
}
r = 1;
goto out;
}
init_snapshot_merge(snap_seg, origin);
/* Commit vg, merge will start with next activation */
if (!vg_write(lv->vg) || !vg_commit(lv->vg))
return_0;
r = 1;
out:
backup(lv->vg);
if (r)
log_print_unless_silent("Merging of thin snapshot %s will occur on "
"next activation of %s.",
display_lvname(lv), display_lvname(origin));
return r;
}
static int _lvconvert_thin_pool_repair(struct cmd_context *cmd,
struct logical_volume *pool_lv,
struct lvconvert_params *lp)
{
const char *dmdir = dm_dir();
const char *thin_dump =
find_config_tree_str_allow_empty(cmd, global_thin_dump_executable_CFG, NULL);
const char *thin_repair =
find_config_tree_str_allow_empty(cmd, global_thin_repair_executable_CFG, NULL);
const struct dm_config_node *cn;
const struct dm_config_value *cv;
int ret = 0, status;
int args = 0;
const char *argv[19]; /* Max supported 10 args */
char *dm_name, *trans_id_str;
char meta_path[PATH_MAX];
char pms_path[PATH_MAX];
uint64_t trans_id;
struct logical_volume *pmslv;
struct logical_volume *mlv = first_seg(pool_lv)->metadata_lv;
struct pipe_data pdata;
FILE *f;
if (!thin_repair || !thin_repair[0]) {
log_error("Thin repair commnand is not configured. Repair is disabled.");
return 0; /* Checking disabled */
}
pmslv = pool_lv->vg->pool_metadata_spare_lv;
/* Check we have pool metadata spare LV */
if (!handle_pool_metadata_spare(pool_lv->vg, 0, lp->pvh, 1))
return_0;
if (pmslv != pool_lv->vg->pool_metadata_spare_lv) {
if (!vg_write(pool_lv->vg) || !vg_commit(pool_lv->vg))
return_0;
pmslv = pool_lv->vg->pool_metadata_spare_lv;
}
if (!(dm_name = dm_build_dm_name(cmd->mem, mlv->vg->name,
mlv->name, NULL)) ||
(dm_snprintf(meta_path, sizeof(meta_path), "%s/%s", dmdir, dm_name) < 0)) {
log_error("Failed to build thin metadata path.");
return 0;
}
if (!(dm_name = dm_build_dm_name(cmd->mem, pmslv->vg->name,
pmslv->name, NULL)) ||
(dm_snprintf(pms_path, sizeof(pms_path), "%s/%s", dmdir, dm_name) < 0)) {
log_error("Failed to build pool metadata spare path.");
return 0;
}
if (!(cn = find_config_tree_array(cmd, global_thin_repair_options_CFG, NULL))) {
log_error(INTERNAL_ERROR "Unable to find configuration for global/thin_repair_options");
return 0;
}
for (cv = cn->v; cv && args < 16; cv = cv->next) {
if (cv->type != DM_CFG_STRING) {
log_error("Invalid string in config file: "
"global/thin_repair_options");
return 0;
}
argv[++args] = cv->v.str;
}
if (args == 10) {
log_error("Too many options for thin repair command.");
return 0;
}
argv[0] = thin_repair;
argv[++args] = "-i";
argv[++args] = meta_path;
argv[++args] = "-o";
argv[++args] = pms_path;
argv[++args] = NULL;
if (pool_is_active(pool_lv)) {
log_error("Only inactive pool can be repaired.");
return 0;
}
if (!activate_lv_local(cmd, pmslv)) {
log_error("Cannot activate pool metadata spare volume %s.",
pmslv->name);
return 0;
}
if (!activate_lv_local(cmd, mlv)) {
log_error("Cannot activate thin pool metadata volume %s.",
mlv->name);
goto deactivate_pmslv;
}
if (!(ret = exec_cmd(cmd, (const char * const *)argv, &status, 1))) {
log_error("Repair of thin metadata volume of thin pool %s failed (status:%d). "
"Manual repair required!",
display_lvname(pool_lv), status);
goto deactivate_mlv;
}
if (thin_dump[0]) {
argv[0] = thin_dump;
argv[1] = pms_path;
argv[2] = NULL;
if (!(f = pipe_open(cmd, argv, 0, &pdata)))
log_warn("WARNING: Cannot read output from %s %s.", thin_dump, pms_path);
else {
/*
* Scan only the 1st. line for transation id.
* Watch out, if the thin_dump format changes
*/
if (fgets(meta_path, sizeof(meta_path), f) &&
(trans_id_str = strstr(meta_path, "transaction=\"")) &&
(sscanf(trans_id_str + 13, FMTu64, &trans_id) == 1) &&
(trans_id != first_seg(pool_lv)->transaction_id) &&
((trans_id - 1) != first_seg(pool_lv)->transaction_id))
log_error("Transaction id " FMTu64 " from pool \"%s/%s\" "
"does not match repaired transaction id "
FMTu64 " from %s.",
first_seg(pool_lv)->transaction_id,
pool_lv->vg->name, pool_lv->name, trans_id,
pms_path);
(void) pipe_close(&pdata); /* killing pipe */
}
}
deactivate_mlv:
if (!deactivate_lv(cmd, mlv)) {
log_error("Cannot deactivate thin pool metadata volume %s.",
mlv->name);
return 0;
}
deactivate_pmslv:
if (!deactivate_lv(cmd, pmslv)) {
log_error("Cannot deactivate thin pool metadata volume %s.",
mlv->name);
return 0;
}
if (!ret)
return 0;
if (pmslv == pool_lv->vg->pool_metadata_spare_lv) {
pool_lv->vg->pool_metadata_spare_lv = NULL;
pmslv->status &= ~POOL_METADATA_SPARE;
lv_set_visible(pmslv);
}
/* Try to allocate new pool metadata spare LV */
if (!handle_pool_metadata_spare(pool_lv->vg, 0, lp->pvh,
lp->poolmetadataspare))
stack;
if (dm_snprintf(meta_path, sizeof(meta_path), "%s_meta%%d", pool_lv->name) < 0) {
log_error("Can't prepare new metadata name for %s.", pool_lv->name);
return 0;
}
if (!generate_lv_name(pool_lv->vg, meta_path, pms_path, sizeof(pms_path))) {
log_error("Can't generate new name for %s.", meta_path);
return 0;
}
if (!detach_pool_metadata_lv(first_seg(pool_lv), &mlv))
return_0;
/* Swap _pmspare and _tmeta name */
if (!swap_lv_identifiers(cmd, mlv, pmslv))
return_0;
if (!attach_pool_metadata_lv(first_seg(pool_lv), pmslv))
return_0;
/* Used _tmeta (now _pmspare) becomes _meta%d */
if (!lv_rename_update(cmd, mlv, pms_path, 0))
return_0;
if (!vg_write(pool_lv->vg) || !vg_commit(pool_lv->vg))
return_0;
log_warn("WARNING: If everything works, remove %s volume.",
display_lvname(mlv));
log_warn("WARNING: Use pvmove command to move %s on the best fitting PV.",
display_lvname(first_seg(pool_lv)->metadata_lv));
return 1;
}
/* Currently converts only to thin volume with external origin */
static int _lvconvert_thin(struct cmd_context *cmd,
struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct logical_volume *torigin_lv, *pool_lv = lp->pool_data_lv;
struct volume_group *vg = lv->vg;
struct lvcreate_params lvc = {
.activate = CHANGE_AEY,
.alloc = ALLOC_INHERIT,
.lv_name = lp->origin_name,
.major = -1,
.minor = -1,
.suppress_zero_warn = 1, /* Suppress warning for this thin */
.permission = LVM_READ,
.pool_name = pool_lv->name,
.pvh = &vg->pvs,
.read_ahead = DM_READ_AHEAD_AUTO,
.stripes = 1,
.virtual_extents = lv->le_count,
};
if (lv == pool_lv) {
log_error("Can't use same LV %s for thin pool and thin volume.",
display_lvname(pool_lv));
return 0;
}
if (lv_is_locked(lv) ||
!lv_is_visible(lv) ||
lv_is_cow(lv) ||
lv_is_pool(lv) ||
lv_is_pool_data(lv) ||
lv_is_pool_metadata(lv)) {
log_error("Can't use%s%s %s %s as external origin.",
lv_is_locked(lv) ? " locked" : "",
lv_is_visible(lv) ? "" : " hidden",
lvseg_name(first_seg(lv)),
display_lvname(lv));
return 0;
}
if (is_lockd_type(lv->vg->lock_type)) {
/*
* FIXME: external origins don't work in lockd VGs.
* Prior to the lvconvert, there's a lock associated with
* the uuid of the external origin LV. After the convert,
* that uuid belongs to the new thin LV, and a new LV with
* a new uuid exists as the non-thin, readonly external LV.
* We'd need to remove the lock for the previous uuid
* (the new thin LV will have no lock), and create a new
* lock for the new LV uuid used by the external LV.
*/
log_error("Can't use lock_type %s LV as external origin.",
lv->vg->lock_type);
return 0;
}
dm_list_init(&lvc.tags);
if (!pool_supports_external_origin(first_seg(pool_lv), lv))
return_0;
if (!(lvc.segtype = get_segtype_from_string(cmd, SEG_TYPE_NAME_THIN)))
return_0;
if (!archive(vg))
return_0;
/* New thin LV needs to be created (all messages sent to pool)
* In this case thin volume is created READ-ONLY and
* also warn about not zeroing is suppressed. */
if (!(torigin_lv = lv_create_single(vg, &lvc)))
return_0;
/* Deactivate prepared Thin LV */
if (!deactivate_lv(cmd, torigin_lv)) {
log_error("Aborting. Unable to deactivate new LV. "
"Manual intervention required.");
return 0;
}
/*
* Crashing till this point will leave plain thin volume
* which could be easily removed by the user after i.e. power-off
*/
if (!swap_lv_identifiers(cmd, torigin_lv, lv)) {
stack;
goto revert_new_lv;
}
/* Preserve read-write status of original LV here */
torigin_lv->status |= (lv->status & LVM_WRITE);
if (!attach_thin_external_origin(first_seg(torigin_lv), lv)) {
stack;
goto revert_new_lv;
}
if (!lv_update_and_reload(torigin_lv)) {
stack;
goto deactivate_and_revert_new_lv;
}
log_print_unless_silent("Converted %s to thin volume with "
"external origin %s.",
display_lvname(torigin_lv),
display_lvname(lv));
return 1;
deactivate_and_revert_new_lv:
if (!swap_lv_identifiers(cmd, torigin_lv, lv))
stack;
if (!deactivate_lv(cmd, torigin_lv)) {
log_error("Unable to deactivate failed new LV. "
"Manual intervention required.");
return 0;
}
if (!detach_thin_external_origin(first_seg(torigin_lv)))
return_0;
revert_new_lv:
/* FIXME Better to revert to backup of metadata? */
if (!lv_remove(torigin_lv) || !vg_write(vg) || !vg_commit(vg))
log_error("Manual intervention may be required to remove "
"abandoned LV(s) before retrying.");
else
backup(vg);
return 0;
}
static int _lvconvert_update_pool_params(struct logical_volume *pool_lv,
struct lvconvert_params *lp)
{
if (lp->pool_metadata_size &&
!(lp->pool_metadata_extents =
extents_from_size(pool_lv->vg->cmd, lp->pool_metadata_size, pool_lv->vg->extent_size)))
return_0;
return update_pool_params(lp->segtype,
pool_lv->vg,
lp->target_attr,
lp->passed_args,
pool_lv->le_count,
&lp->pool_metadata_extents,
&lp->thin_chunk_size_calc_policy,
&lp->chunk_size,
&lp->discards,
&lp->zero);
}
/*
* Converts a data lv and a metadata lv into a thin or cache pool lv.
*
* Thin lvconvert version which
* rename metadata
* convert/layers thinpool over data
* attach metadata
*
* pool_lv might or might not already be a pool.
*/
static int _lvconvert_pool(struct cmd_context *cmd,
struct logical_volume *pool_lv,
struct lvconvert_params *lp)
{
int r = 0;
const char *old_name;
struct lv_segment *seg;
struct volume_group *vg = pool_lv->vg;
struct logical_volume *data_lv;
struct logical_volume *metadata_lv = NULL;
struct logical_volume *pool_metadata_lv;
char *lockd_data_args = NULL;
char *lockd_meta_args = NULL;
char *lockd_data_name = NULL;
char *lockd_meta_name = NULL;
struct id lockd_data_id;
struct id lockd_meta_id;
char metadata_name[NAME_LEN], data_name[NAME_LEN];
int zero_metadata = 1;
int activate_pool;
if (lp->pool_data_name) {
if ((lp->thin || lp->cache) &&
!strcmp(lp->pool_data_name, pool_lv->name)) {
log_error("Converted volume %s and pool volume must differ.",
display_lvname(pool_lv));
return 0;
}
if (!(pool_lv = find_lv(vg, lp->pool_data_name))) {
log_error("Unknown pool data LV %s.", lp->pool_data_name);
return 0;
}
}
/* An existing LV needs to have its lock freed once it becomes a data LV. */
if (is_lockd_type(vg->lock_type) && !lv_is_pool(pool_lv) && pool_lv->lock_args) {
lockd_data_args = dm_pool_strdup(cmd->mem, pool_lv->lock_args);
lockd_data_name = dm_pool_strdup(cmd->mem, pool_lv->name);
memcpy(&lockd_data_id, &pool_lv->lvid.id[1], sizeof(struct id));
}
if (!lv_is_visible(pool_lv)) {
log_error("Can't convert internal LV %s.", display_lvname(pool_lv));
return 0;
}
if (lv_is_locked(pool_lv)) {
log_error("Can't convert locked LV %s.", display_lvname(pool_lv));
return 0;
}
if (lv_is_thin_pool(pool_lv) && (segtype_is_cache_pool(lp->segtype) || lp->cache)) {
log_error("Can't convert thin pool LV %s.", display_lvname(pool_lv));
return 0;
}
if (lv_is_cache(pool_lv) && !segtype_is_thin_pool(lp->segtype)) {
log_error("Cached LV %s could be only converted into a thin pool volume.",
display_lvname(pool_lv));
return 0;
}
if (lv_is_cache_pool(pool_lv) && (segtype_is_thin_pool(lp->segtype) || lp->thin)) {
log_error("Cannot convert cache pool %s as pool data volume.",
display_lvname(pool_lv));
return 0;
}
if (lv_is_mirror(pool_lv)) {
log_error("Mirror logical volumes cannot be used as pools.");
log_print_unless_silent("Try \"%s\" segment type instead.", SEG_TYPE_NAME_RAID1);
return 0;
}
/*
* Only linear, striped and raid supported.
* FIXME Tidy up all these type restrictions.
*/
if (!lv_is_pool(pool_lv) &&
(lv_is_thin_type(pool_lv) ||
lv_is_cow(pool_lv) || lv_is_merging_cow(pool_lv) ||
lv_is_origin(pool_lv) ||lv_is_merging_origin(pool_lv) ||
lv_is_external_origin(pool_lv) ||
lv_is_virtual(pool_lv))) {
log_error("Pool data LV %s is of an unsupported type.", display_lvname(pool_lv));
return 0;
}
if (lp->pool_metadata_name) {
if (!(lp->pool_metadata_lv = find_lv(vg, lp->pool_metadata_name))) {
log_error("Unknown pool metadata LV %s.", lp->pool_metadata_name);
return 0;
}
lp->pool_metadata_extents = lp->pool_metadata_lv->le_count;
metadata_lv = lp->pool_metadata_lv;
/* An existing LV needs to have its lock freed once it becomes a meta LV. */
if (is_lockd_type(vg->lock_type) && metadata_lv->lock_args) {
lockd_meta_args = dm_pool_strdup(cmd->mem, metadata_lv->lock_args);
lockd_meta_name = dm_pool_strdup(cmd->mem, metadata_lv->name);
memcpy(&lockd_meta_id, &metadata_lv->lvid.id[1], sizeof(struct id));
}
if (metadata_lv == pool_lv) {
log_error("Can't use same LV for pool data and metadata LV %s.",
display_lvname(metadata_lv));
return 0;
}
if (!lv_is_visible(metadata_lv)) {
log_error("Can't convert internal LV %s.",
display_lvname(metadata_lv));
return 0;
}
if (lv_is_locked(metadata_lv)) {
log_error("Can't convert locked LV %s.",
display_lvname(metadata_lv));
return 0;
}
if (lv_is_mirror(metadata_lv)) {
log_error("Mirror logical volumes cannot be used for pool metadata.");
log_print_unless_silent("Try \"%s\" segment type instead.", SEG_TYPE_NAME_RAID1);
return 0;
}
/* FIXME Tidy up all these type restrictions. */
if (lv_is_cache_type(metadata_lv) ||
lv_is_thin_type(metadata_lv) ||
lv_is_cow(metadata_lv) || lv_is_merging_cow(metadata_lv) ||
lv_is_origin(metadata_lv) || lv_is_merging_origin(metadata_lv) ||
lv_is_external_origin(metadata_lv) ||
lv_is_virtual(metadata_lv)) {
log_error("Pool metadata LV %s is of an unsupported type.",
display_lvname(metadata_lv));
return 0;
}
if (!lv_is_pool(pool_lv)) {
if (!_lvconvert_update_pool_params(pool_lv, lp))
return_0;
if (lp->pool_metadata_extents > metadata_lv->le_count) {
log_error("Logical volume %s is too small for metadata.",
display_lvname(metadata_lv));
return 0;
}
}
}
if (lv_is_pool(pool_lv)) {
lp->pool_data_lv = pool_lv;
if (!metadata_lv) {
if (arg_from_list_is_set(cmd, "is invalid with existing pool",
discards_ARG,
poolmetadatasize_ARG, -1))
return_0;
if (lp->thin &&
arg_from_list_is_set(cmd, "is invalid with existing thin pool",
chunksize_ARG, zero_ARG, -1))
return_0;
if (lp->cache) {
if (!lp->chunk_size)
lp->chunk_size = first_seg(pool_lv)->chunk_size;
if (!validate_lv_cache_chunk_size(pool_lv, lp->chunk_size))
return_0;
/* Check is user requested zeroing logic via [-Z y|n] */
if (!arg_is_set(cmd, zero_ARG)) {
/* Note: requires rather deep know-how to skip zeroing */
if (!lp->yes &&
yes_no_prompt("Do you want wipe existing metadata of "
"cache pool volume %s? [y/n]: ",
display_lvname(pool_lv)) == 'n') {
log_error("Conversion aborted.");
log_error("To preserve cache metadata add option \"--zero n\".");
log_warn("WARNING: Reusing mismatched cache pool metadata "
"MAY DESTROY YOUR DATA!");
return 0;
}
/* Wiping confirmed, go ahead */
if (!wipe_cache_pool(pool_lv))
return_0;
} else if (arg_int_value(cmd, zero_ARG, 0)) {
if (!wipe_cache_pool(pool_lv)) /* Wipe according to -Z y|n */
return_0;
} else
log_warn("WARNING: Reusing cache pool metadata %s "
"for volume caching.", display_lvname(pool_lv));
}
if (lp->thin || lp->cache)
/* already pool, can continue converting volume */
return 1;
log_error("LV %s is already pool.", display_lvname(pool_lv));
return 0;
}
if (lp->thin || lp->cache) {
log_error("--%s and pool metadata swap is not supported.",
lp->thin ? "thin" : "cache");
return 0;
}
/* FIXME cache pool */
if (lv_is_thin_pool(pool_lv) && pool_is_active(pool_lv)) {
/* If any volume referencing pool active - abort here */
log_error("Cannot convert pool %s with active volumes.",
display_lvname(pool_lv));
return 0;
}
lp->passed_args |= PASS_ARG_CHUNK_SIZE | PASS_ARG_DISCARDS | PASS_ARG_ZERO;
seg = first_seg(pool_lv);
/* Normally do NOT change chunk size when swapping */
if (arg_is_set(cmd, chunksize_ARG) &&
(lp->chunk_size != seg->chunk_size) &&
!dm_list_empty(&pool_lv->segs_using_this_lv)) {
if (lp->force == PROMPT) {
log_error("Chunk size can be only changed with --force. Conversion aborted.");
return 0;
}
log_warn("WARNING: Changing chunk size %s to "
"%s for %s pool volume.",
display_size(cmd, seg->chunk_size),
display_size(cmd, lp->chunk_size),
display_lvname(pool_lv));
/* Ok, user has likely some serious reason for this */
if (!lp->yes &&
yes_no_prompt("Do you really want to change chunk size "
"for %s pool volume? [y/n]: ",
display_lvname(pool_lv)) == 'n') {
log_error("Conversion aborted.");
return 0;
}
} else
lp->chunk_size = seg->chunk_size;
if (!_lvconvert_update_pool_params(pool_lv, lp))
return_0;
if (metadata_lv->le_count < lp->pool_metadata_extents)
log_print_unless_silent("Continuing with swap...");
if (!arg_is_set(cmd, discards_ARG))
lp->discards = seg->discards;
if (!arg_is_set(cmd, zero_ARG))
lp->zero = seg->zero_new_blocks;
if (!lp->yes &&
yes_no_prompt("Do you want to swap metadata of %s "
"pool with metadata volume %s? [y/n]: ",
display_lvname(pool_lv),
display_lvname(metadata_lv)) == 'n') {
log_error("Conversion aborted.");
return 0;
}
} else {
/* Only cache pool conversion may suppress metadata zeroing
* TODO: Maybe similar support could be useful for thin-pool, but --zero
* is already overloade and we would also need to possibly match transaction Id. */
if (segtype_is_cache_pool(lp->segtype) && metadata_lv)
/* Check is user requested zeroing logic via [-Z y|n] (default is yes) */
zero_metadata = arg_int_value(cmd, zero_ARG, 1);
log_warn("WARNING: Converting logical volume %s%s%s to %s pool's data%s %s metadata wiping.",
display_lvname(pool_lv),
metadata_lv ? " and " : "",
metadata_lv ? display_lvname(metadata_lv) : "",
segtype_is_cache_pool(lp->segtype) ? "cache" : "thin",
metadata_lv ? " and metadata volumes" : " volume",
zero_metadata ? "with" : "WITHOUT");
if (zero_metadata)
log_warn("THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)");
else /* ATM supported only for cache pools */
log_warn("WARNING: Using mismatched cache pool metadata "
"MAY DESTROY YOUR DATA!");
if (!lp->yes &&
yes_no_prompt("Do you really want to convert %s%s%s? [y/n]: ",
display_lvname(pool_lv),
metadata_lv ? " and " : "",
metadata_lv ? display_lvname(metadata_lv) : "") == 'n') {
log_error("Conversion aborted.");
return 0;
}
}
if (segtype_is_cache_pool(lp->segtype))
activate_pool = 0; /* Cannot activate cache pool */
else
/* Allow to have only thinpool active and restore it's active state */
activate_pool = lv_is_active(pool_lv);
if ((dm_snprintf(metadata_name, sizeof(metadata_name), "%s%s",
pool_lv->name,
(segtype_is_cache_pool(lp->segtype)) ?
"_cmeta" : "_tmeta") < 0) ||
(dm_snprintf(data_name, sizeof(data_name), "%s%s",
pool_lv->name,
(segtype_is_cache_pool(lp->segtype)) ?
"_cdata" : "_tdata") < 0)) {
log_error("Failed to create internal lv names, "
"pool name is too long.");
return 0;
}
if (!metadata_lv) {
if (!_lvconvert_update_pool_params(pool_lv, lp))
return_0;
if (!get_stripe_params(cmd, get_segtype_from_string(cmd, SEG_TYPE_NAME_STRIPED),
&lp->stripes, &lp->stripe_size, &lp->stripes_supplied, &lp->stripe_size_supplied))
return_0;
if (!archive(vg))
return_0;
if (!(metadata_lv = alloc_pool_metadata(pool_lv, metadata_name,
lp->read_ahead, lp->stripes,
lp->stripe_size,
lp->pool_metadata_extents,
lp->alloc, lp->pvh)))
return_0;
} else {
if (!deactivate_lv(cmd, metadata_lv)) {
log_error("Aborting. Failed to deactivate %s.",
display_lvname(metadata_lv));
return 0;
}
if (!archive(vg))
return_0;
/* Swap normal LV with pool's metadata LV ? */
if (lv_is_pool(pool_lv)) {
/* Swap names between old and new metadata LV */
seg = first_seg(pool_lv);
if (!detach_pool_metadata_lv(seg, &pool_metadata_lv))
return_0;
old_name = metadata_lv->name;
if (!lv_rename_update(cmd, metadata_lv, "pvmove_tmeta", 0))
return_0;
if (!lv_rename_update(cmd, pool_metadata_lv, old_name, 0))
return_0;
goto mda_write;
}
if (zero_metadata) {
metadata_lv->status |= LV_TEMPORARY;
if (!activate_lv_local(cmd, metadata_lv)) {
log_error("Aborting. Failed to activate metadata lv.");
return 0;
}
if (!wipe_lv(metadata_lv, (struct wipe_params) { .do_zero = 1 })) {
log_error("Aborting. Failed to wipe metadata lv.");
return 0;
}
}
}
/* We are changing target type, so deactivate first */
if (!deactivate_lv(cmd, metadata_lv)) {
log_error("Aborting. Failed to deactivate metadata lv. "
"Manual intervention required.");
return 0;
}
if (!deactivate_lv(cmd, pool_lv)) {
log_error("Aborting. Failed to deactivate logical volume %s.",
display_lvname(pool_lv));
return 0;
}
data_lv = pool_lv;
old_name = data_lv->name; /* Use for pool name */
/*
* Since we wish to have underlaying devs to match _[ct]data
* rename data LV to match pool LV subtree first,
* also checks for visible LV.
*/
/* FIXME: any more types prohibited here? */
if (!lv_rename_update(cmd, data_lv, data_name, 0))
return_0;
if (!(pool_lv = lv_create_empty(old_name, NULL,
((segtype_is_cache_pool(lp->segtype)) ?
CACHE_POOL : THIN_POOL) |
VISIBLE_LV | LVM_READ | LVM_WRITE,
ALLOC_INHERIT, vg))) {
log_error("Creation of pool LV failed.");
return 0;
}
/* Allocate a new pool segment */
if (!(seg = alloc_lv_segment(lp->segtype, pool_lv, 0, data_lv->le_count,
pool_lv->status, 0, NULL, 1,
data_lv->le_count, 0, 0, 0, NULL)))
return_0;
/* Add the new segment to the layer LV */
dm_list_add(&pool_lv->segments, &seg->list);
pool_lv->le_count = data_lv->le_count;
pool_lv->size = data_lv->size;
if (!attach_pool_data_lv(seg, data_lv))
return_0;
/*
* Create a new lock for a thin pool LV. A cache pool LV has no lock.
* Locks are removed from existing LVs that are being converted to
* data and meta LVs (they are unlocked and deleted below.)
*/
if (is_lockd_type(vg->lock_type)) {
if (segtype_is_cache_pool(lp->segtype)) {
data_lv->lock_args = NULL;
metadata_lv->lock_args = NULL;
} else {
data_lv->lock_args = NULL;
metadata_lv->lock_args = NULL;
if (!strcmp(vg->lock_type, "sanlock"))
pool_lv->lock_args = "pending";
else if (!strcmp(vg->lock_type, "dlm"))
pool_lv->lock_args = "dlm";
/* The lock_args will be set in vg_write(). */
}
}
/* FIXME: revert renamed LVs in fail path? */
/* FIXME: any common code with metadata/thin_manip.c extend_pool() ? */
seg->transaction_id = 0;
mda_write:
seg->chunk_size = lp->chunk_size;
seg->discards = lp->discards;
seg->zero_new_blocks = lp->zero ? 1 : 0;
if (lp->cache_mode &&
!cache_set_cache_mode(seg, lp->cache_mode))
return_0;
if ((lp->policy_name || lp->policy_settings) &&
!cache_set_policy(seg, lp->policy_name, lp->policy_settings))
return_0;
/* Rename deactivated metadata LV to have _tmeta suffix */
/* Implicit checks if metadata_lv is visible */
if (lp->pool_metadata_name &&
!lv_rename_update(cmd, metadata_lv, metadata_name, 0))
return_0;
if (!attach_pool_metadata_lv(seg, metadata_lv))
return_0;
if (!handle_pool_metadata_spare(vg, metadata_lv->le_count,
lp->pvh, lp->poolmetadataspare))
return_0;
if (!vg_write(vg) || !vg_commit(vg))
return_0;
if (seg->zero_new_blocks &&
seg->chunk_size >= DEFAULT_THIN_POOL_CHUNK_SIZE_PERFORMANCE * 2)
log_warn("WARNING: Pool zeroing and large %s chunk size slows down "
"provisioning.", display_size(cmd, seg->chunk_size));
if (activate_pool && !lockd_lv(cmd, pool_lv, "ex", LDLV_PERSISTENT)) {
log_error("Failed to lock pool LV %s.", display_lvname(pool_lv));
goto out;
}
if (activate_pool &&
!activate_lv_excl(cmd, pool_lv)) {
log_error("Failed to activate pool logical volume %s.",
display_lvname(pool_lv));
/* Deactivate subvolumes */
if (!deactivate_lv(cmd, seg_lv(seg, 0)))
log_error("Failed to deactivate pool data logical volume %s.",
display_lvname(seg_lv(seg, 0)));
if (!deactivate_lv(cmd, seg->metadata_lv))
log_error("Failed to deactivate pool metadata logical volume %s.",
display_lvname(seg->metadata_lv));
goto out;
}
r = 1;
lp->pool_data_lv = pool_lv;
out:
backup(vg);
if (r)
log_print_unless_silent("Converted %s to %s pool.",
display_lvname(pool_lv),
(segtype_is_cache_pool(lp->segtype)) ?
"cache" : "thin");
/*
* Unlock and free the locks from existing LVs that became pool data
* and meta LVs.
*/
if (lockd_data_name) {
if (!lockd_lv_name(cmd, vg, lockd_data_name, &lockd_data_id, lockd_data_args, "un", LDLV_PERSISTENT))
log_error("Failed to unlock pool data LV %s/%s", vg->name, lockd_data_name);
lockd_free_lv(cmd, vg, lockd_data_name, &lockd_data_id, lockd_data_args);
}
if (lockd_meta_name) {
if (!lockd_lv_name(cmd, vg, lockd_meta_name, &lockd_meta_id, lockd_meta_args, "un", LDLV_PERSISTENT))
log_error("Failed to unlock pool metadata LV %s/%s", vg->name, lockd_meta_name);
lockd_free_lv(cmd, vg, lockd_meta_name, &lockd_meta_id, lockd_meta_args);
}
return r;
#if 0
revert_new_lv:
/* TBD */
if (!lp->pool_metadata_lv_name) {
if (!deactivate_lv(cmd, metadata_lv)) {
log_error("Failed to deactivate metadata lv.");
return 0;
}
if (!lv_remove(metadata_lv) || !vg_write(vg) || !vg_commit(vg))
log_error("Manual intervention may be required to remove "
"abandoned LV(s) before retrying.");
else
backup(vg);
}
return 0;
#endif
}
/*
* Convert origin into a cache LV by attaching a cache pool.
*/
static int _lvconvert_cache(struct cmd_context *cmd,
struct logical_volume *origin_lv,
struct lvconvert_params *lp)
{
struct logical_volume *pool_lv = lp->pool_data_lv;
struct logical_volume *cache_lv;
if (!validate_lv_cache_create_pool(pool_lv))
return_0;
if (!archive(origin_lv->vg))
return_0;
if (!(cache_lv = lv_cache_create(pool_lv, origin_lv)))
return_0;
if (!cache_set_cache_mode(first_seg(cache_lv), lp->cache_mode))
return_0;
if (!cache_set_policy(first_seg(cache_lv), lp->policy_name, lp->policy_settings))
return_0;
cache_check_for_warns(first_seg(cache_lv));
if (!lv_update_and_reload(cache_lv))
return_0;
log_print_unless_silent("Logical volume %s is now cached.",
display_lvname(cache_lv));
return 1;
}
/*
* Functions called to perform a specific operation on a specific LV type.
*
* _convert_<lvtype>_<operation>
*
* For cases where an operation does not apply to the LV itself, but
* is implicitly redirected to a sub-LV, these functions locate the
* correct sub-LV and call the operation on that sub-LV. If a sub-LV
* of the proper type is not found, these functions report the error.
*
* FIXME: the _lvconvert_foo() functions can be cleaned up since they
* are now only called for valid combinations of LV type and operation.
* After that happens, the code remaining in those functions can be
* moved into the _convert_lvtype_operation() functions below.
*/
/*
* Separate a COW snapshot LV from its origin.
* lvconvert --splitsnapshot LV
*/
static int _convert_cow_snapshot_splitsnapshot(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_splitsnapshot(cmd, lv, lp);
}
/*
* Merge a COW snapshot LV into its origin.
* lvconvert --merge LV
*/
static int _convert_cow_snapshot_merge(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_merge_old_snapshot(cmd, lv, lp);
}
/*
* Merge a snapshot thin LV into its origin.
* lvconvert --merge LV
*/
static int _convert_thin_volume_merge(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_merge_thin_snapshot(cmd, lv, lp);
}
/*
* Split and preserve a cache pool from the data portion of a thin pool LV.
* lvconvert --splitcache LV
*/
static int _convert_thin_pool_splitcache(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct logical_volume *sublv1;
sublv1 = seg_lv(first_seg(lv), 0); /* cached _tdata ? */
if (!lv_is_cache(sublv1)) {
log_error("Sub LV %s must be cache.", display_lvname(sublv1));
return 0;
}
return _lvconvert_split_cached(cmd, sublv1);
}
/*
* Split and remove a cache pool from the data portion of a thin pool LV.
* lvconvert --uncache LV
*/
static int _convert_thin_pool_uncache(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct logical_volume *sublv1 = NULL;
sublv1 = seg_lv(first_seg(lv), 0); /* cached _tdata ? */
if (!lv_is_cache(sublv1)) {
log_error("Sub LV %s must be cache.", display_lvname(sublv1));
return 0;
}
return _lvconvert_uncache(cmd, sublv1, lp);
}
/*
* Repair a thin pool LV.
* lvconvert --repair LV
*/
static int _convert_thin_pool_repair(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_thin_pool_repair(cmd, lv, lp);
}
/*
* Convert the data portion of a thin pool LV to a cache LV.
* lvconvert --type cache LV
*
* Required options:
* --cachepool LV
*
* Auxiliary operation:
* Converts the --cachepool arg to a cache pool if it is not already.
*
* Alternate syntax:
* lvconvert --cache LV
*/
static int _convert_thin_pool_cache(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* lvconvert --type cache includes an implicit conversion of the cachepool arg to type cache-pool. */
if (!_lvconvert_pool(cmd, lv, lp)) {
log_error("Implicit conversion of --cachepool arg to type cache-pool failed.");
return 0;
}
/* Do we need to grab the tdata sub LV to pass on? */
return _lvconvert_cache(cmd, lv, lp);
}
/*
* Replace the metadata LV in a thin pool LV.
* lvconvert --poolmetadata NewLV --thinpool LV
* FIXME: this will change so --swap-poolmetadata defines the operation.
* FIXME: should be lvconvert --swap-poolmetadata NewLV LV
*/
static int _convert_thin_pool_swapmetadata(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_pool(cmd, lv, lp);
}
/*
* Split and preserve a cache pool from a cache LV.
* lvconvert --splitcache LV
*/
static int _convert_cache_volume_splitcache(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_split_cached(cmd, lv);
}
/*
* Split and remove a cache pool from a cache LV.
* lvconvert --uncache LV
*/
static int _convert_cache_volume_uncache(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_uncache(cmd, lv, lp);
}
/*
* Split images from the raid1|mirror origin of a cache LV and use them to create a new LV.
* lvconvert --splitmirrors Number LV
*
* Required options:
* --trackchanges | --name Name
*/
static int _convert_cache_volume_splitmirrors(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct logical_volume *sublv1;
sublv1 = seg_lv(first_seg(lv), 0);
if (lv_is_raid(sublv1))
return _lvconvert_raid(sublv1, lp);
if (lv_is_mirror(sublv1))
return _lvconvert_mirrors(cmd, lv, lp);
log_error("Sub LV %s must be raid or mirror.", display_lvname(sublv1));
return 0;
}
/*
* Convert a cache LV to a thin pool (using the cache LV for thin pool data).
* lvconvert --type thin-pool LV
*
* Convert a cache LV to a thin volume with cached external origin using given
* thinpool tpLV (when not yet Thinpool convert it to thin-pool first).
* Conversion is 2-step process in this case.
* Only writethrough cacheLV can be converted as external origin is read-only.
* lvconvert --thin cacheLV --thinpool tpLV
*
* Alternate syntax:
* This is equivalent to above, but not preferred because it's ambiguous and inconsistent.
* lvconvert --thinpool LV
*/
static int _convert_cache_volume_thin_pool(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
int is_clean;
const struct lv_segment *pool_seg;
if (!_lvconvert_pool(cmd, lv, lp))
return_0;
if (lv_is_cache(lv) && !lv_is_pool_data(lv)) {
pool_seg = first_seg(first_seg(lv)->pool_lv);
if (pool_seg->cache_mode != CACHE_MODE_WRITETHROUGH) {
log_error("Cannot convert cache volume %s with %s cache mode to external origin.",
display_lvname(lv),
get_cache_mode_name(pool_seg));
log_error("To proceed, run 'lvchange --cachemode writethrough %s'.",
display_lvname(lv));
return 0;
}
if (!lv_cache_wait_for_clean(lv, &is_clean))
return_0;
if (!is_clean) {
log_error("Cache %s is not clean, refusing to convert to external origin.",
display_lvname(lv));
return 0;
}
if (!_lvconvert_thin(cmd, lv, lp))
return_0;
}
return 1;
}
/*
* Convert/Recombine cacheLV to be an origin for snapshot
* lvconvert --type snapshot cacheLV snapshotLV
*/
static int _convert_cache_volume_snapshot(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_snapshot(cmd, lv, lp);
}
/*
* Split a cache volume from a cache pool LV.
* lvconvert --splitcache LV
*/
static int _convert_cache_pool_splitcache(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct logical_volume *sublv1;
struct lv_segment *seg;
/* When passed used cache-pool of used cached LV -> split cached LV */
if ((dm_list_size(&lv->segs_using_this_lv) == 1) &&
(seg = get_only_segment_using_this_lv(lv)) &&
seg_is_cache(seg))
sublv1 = seg->lv;
else {
log_error("Sub LV of cache type not found.");
return 0;
}
if (!lv_is_cache(sublv1)) {
log_error("Sub LV %s must be cache.", display_lvname(sublv1));
return 0;
}
return _lvconvert_split_cached(cmd, sublv1);
}
/*
* Replace the metadata LV in a cache pool LV.
* lvconvert --poolmetadata NewLV --cachepool LV
* FIXME: this will change so --swap-poolmetadata defines the operation.
* FIXME: should be lvconvert --swap-poolmetadata NewLV LV
*/
static int _convert_cache_pool_swapmetadata(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_pool(cmd, lv, lp);
}
/*
* Change the number of images in a mirror LV.
* lvconvert --mirrors Number LV
*/
static int _convert_mirror_number(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_mirrors(cmd, lv, lp);
}
/*
* Split images from a mirror LV and use them to create a new LV.
* lvconvert --splitmirrors Number LV
*
* Required options:
* --name Name
*/
static int _convert_mirror_splitmirrors(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_mirrors(cmd, lv, lp);
}
/*
* Change the type of log used by a mirror LV.
* lvconvert --mirrorlog Type LV
*/
static int _convert_mirror_log(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_mirrors(cmd, lv, lp);
}
/*
* Replace failed PVs in a mirror LV.
* lvconvert --repair LV
*
* Auxiliary operation:
* Removes missing, empty PVs from the VG, like vgreduce.
*/
static int _convert_mirror_repair(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct dm_list *failed_pvs;
int ret;
ret = _lvconvert_mirrors_repair(cmd, lv, lp);
if (ret && arg_is_set(cmd, usepolicies_ARG)) {
if ((failed_pvs = _failed_pv_list(lv->vg)))
_remove_missing_empty_pv(lv->vg, failed_pvs);
}
return ret;
}
/*
* Convert mirror LV to linear LV.
* lvconvert --type linear LV
*
* Alternate syntax:
* lvconvert --mirrors 0 LV
*/
static int _convert_mirror_linear(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_mirrors(cmd, lv, lp);
}
/*
* Convert mirror LV to raid1 LV.
* lvconvert --type raid1 LV
*/
static int _convert_mirror_raid(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_raid(lv, lp);
}
/*
* Change the number of images in a raid1 LV.
* lvconvert --mirrors Number LV
*/
static int _convert_raid_number(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_raid(lv, lp);
}
/*
* Split images from a raid1 LV and use them to create a new LV.
* lvconvert --splitmirrors Number LV
*
* Required options:
* --trackchanges | --name Name
*/
static int _convert_raid_splitmirrors(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* FIXME: split the splitmirrors section out of _lvconvert_raid and call it here. */
return _lvconvert_raid(lv, lp);
}
/*
* Merge a raid1 LV into originalLV if the raid1 LV was
* previously split from the originalLV using --trackchanges.
* lvconvert --merge LV
*/
static int _convert_raid_merge(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* FIXME: split the merge section out of _lvconvert_raid and call it here. */
return _lvconvert_raid(lv, lp);
}
/*
* Replace failed PVs in a raid* LV.
* lvconvert --repair LV
*
* Auxiliary operation:
* Removes missing, empty PVs from the VG, like vgreduce.
*/
static int _convert_raid_repair(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct dm_list *failed_pvs;
int ret;
/* FIXME: split the repair section out of _lvconvert_raid and call it here. */
ret = _lvconvert_raid(lv, lp);
if (ret && arg_is_set(cmd, usepolicies_ARG)) {
if ((failed_pvs = _failed_pv_list(lv->vg)))
_remove_missing_empty_pv(lv->vg, failed_pvs);
}
return ret;
}
/*
* Replace a specific PV in a raid* LV with another PV.
* lvconvert --replace PV LV
*/
static int _convert_raid_replace(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* FIXME: remove the replace section from _lvconvert_raid */
return _lvconvert_raid(lv, lp);
}
/*
* Combine a raid* LV with a snapshot LV that was previously
* split from the raid* LV using --splitsnapshot.
* lvconvert --type snapshot LV SnapshotLV
*
* Alternate syntax:
* lvconvert --snapshot LV SnapshotLV
*/
static int _convert_raid_snapshot(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_snapshot(cmd, lv, lp);
}
/*
* Convert a raid* LV to a thin LV with an external origin.
* lvconvert --type thin LV
*
* Required options:
* --thinpool LV
*
* Auxiliary operation:
* Converts the --thinpool arg to a thin pool if it is not already.
*
* Alternate syntax:
* lvconvert --thin LV
*/
static int _convert_raid_thin(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* lvconvert --thin includes an implicit conversion of the thinpool arg to type thin-pool. */
if (!_lvconvert_pool(cmd, lv, lp)) {
log_error("Implicit conversion of --thinpool arg to type thin-pool failed.");
return 0;
}
return _lvconvert_thin(cmd, lv, lp);
}
/*
* Convert a raid* LV to a cache LV.
* lvconvert --type cache LV
*
* Required options:
* --cachepool LV
*
* Auxiliary operation:
* Converts the --cachepool arg to a cache pool if it is not already.
*
* Alternate syntax:
* lvconvert --cache LV
*/
static int _convert_raid_cache(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* lvconvert --type cache includes an implicit conversion of the cachepool arg to type cache-pool. */
if (!_lvconvert_pool(cmd, lv, lp)) {
log_error("Implicit conversion of --cachepool arg to type cache-pool failed.");
return 0;
}
return _lvconvert_cache(cmd, lv, lp);
}
/*
* Convert a raid* LV to a thin-pool LV.
* lvconvert --type thin-pool LV
*
* Alternate syntax:
* This is equivalent to above, but not preferred because it's ambiguous and inconsistent.
* lvconvert --thinpool LV
*/
static int _convert_raid_thin_pool(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_pool(cmd, lv, lp);
}
/*
* Convert a raid* LV to cache-pool LV.
* lvconvert --type cache-pool LV
*/
static int _convert_raid_cache_pool(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_pool(cmd, lv, lp);
}
/*
* Convert a raid* LV to use a different raid level.
* lvconvert --type raid* LV
*/
static int _convert_raid_raid(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_raid(lv, lp);
}
/*
* Convert a raid* LV to a mirror LV.
* lvconvert --type mirror LV
*/
static int _convert_raid_mirror(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_raid(lv, lp);
}
/*
* Convert a raid* LV to a striped LV.
* lvconvert --type striped LV
*/
static int _convert_raid_striped(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_raid(lv, lp);
}
/*
* Convert a raid* LV to a linear LV.
* lvconvert --type linear LV
*/
static int _convert_raid_linear(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_raid(lv, lp);
}
/*
* Merge a striped/linear LV into a raid1 LV if the striped/linear LV was
* previously split from the raid1 LV using --trackchanges.
* lvconvert --merge LV
*/
static int _convert_striped_merge(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_raid(lv, lp);
}
/*
* Combine a linear/striped LV with a snapshot LV that was previously
* split from the linear/striped LV using --splitsnapshot.
* lvconvert --type snapshot LV SnapshotLV
*
* Alternate syntax:
* lvconvert --snapshot LV SnapshotLV
*/
static int _convert_striped_snapshot(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_snapshot(cmd, lv, lp);
}
/*
* Convert a striped/linear LV to a thin LV with an external origin.
* lvconvert --type thin LV
*
* Required options:
* --thinpool LV
*
* Auxiliary operation:
* Converts the --thinpool arg to a thin pool if it is not already.
*
* Alternate syntax:
* lvconvert --thin LV
*/
static int _convert_striped_thin(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* lvconvert --thin includes an implicit conversion of the thinpool arg to type thin-pool. */
if (!_lvconvert_pool(cmd, lv, lp)) {
log_error("Conversion of --thinpool arg to type thin-pool failed.");
return 0;
}
return _lvconvert_thin(cmd, lv, lp);
}
/*
* Convert a striped/linear LV to a cache LV.
* lvconvert --type cache LV
*
* Required options:
* --cachepool LV
*
* Auxiliary operation:
* Converts the --cachepool arg to a cache pool if it is not already.
*
* Alternate syntax:
* lvconvert --cache LV
*/
static int _convert_striped_cache(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* lvconvert --cache includes an implicit conversion of the cachepool arg to type cache-pool. */
if (!_lvconvert_pool(cmd, lv, lp)) {
log_error("Conversion of --cachepool arg to type cache-pool failed.");
return 0;
}
return _lvconvert_cache(cmd, lv, lp);
}
/*
* Convert a striped/linear LV to a thin-pool LV.
* lvconvert --type thin-pool LV
*
* Alternate syntax:
* This is equivalent to above, but not preferred because it's ambiguous and inconsistent.
* lvconvert --thinpool LV
*/
static int _convert_striped_thin_pool(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_pool(cmd, lv, lp);
}
/*
* Convert a striped/linear LV to a cache-pool LV.
* lvconvert --type cache-pool LV
*/
static int _convert_striped_cache_pool(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_pool(cmd, lv, lp);
}
/*
* Convert a striped/linear LV to a mirror LV.
* lvconvert --type mirror LV
*
* Required options:
* --mirrors Number
*
* Alternate syntax:
* This is equivalent to above when global/mirror_segtype_default="mirror".
* lvconvert --mirrors Number LV
*/
static int _convert_striped_mirror(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_mirrors(cmd, lv, lp);
}
/*
* Convert a striped/linear LV to a raid* LV.
* lvconvert --type raid* LV
*
* Required options:
* --mirrors Number
*
* Alternate syntax:
* This is equivalent to above when global/mirror_segtype_default="raid1".
* lvconvert --mirrors Number LV
*/
static int _convert_striped_raid(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
return _lvconvert_raid(lv, lp);
}
/*
* Functions called to perform all valid operations on a given LV type.
*
* _convert_<lvtype>
*/
static int _convert_cow_snapshot(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
if (lp->splitsnapshot)
return _convert_cow_snapshot_splitsnapshot(cmd, lv, lp);
/* FIXME: add --merge-snapshot to make this distinct from --merge-mirror. */
if (lp->merge)
return _convert_cow_snapshot_merge(cmd, lv, lp);
log_error("Operation not permitted on COW snapshot LV %s.", display_lvname(lv));
log_error("Operations permitted on a COW snapshot LV are:\n"
" --splitsnapshot\n"
" --merge\n");
return 0;
}
static int _convert_thin_volume(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* FIXME: add --merge-snapshot to make this distinct from --merge-mirror. */
if (lp->merge)
return _convert_thin_volume_merge(cmd, lv, lp);
log_error("Operation not permitted on thin LV %s.", display_lvname(lv));
log_error("Operations permitted on a thin LV are:\n"
" --merge\n");
return 0;
}
static int _convert_thin_pool(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
if (lp->splitcache)
return _convert_thin_pool_splitcache(cmd, lv, lp);
if (lp->split)
return _convert_thin_pool_splitcache(cmd, lv, lp);
if (lp->uncache)
return _convert_thin_pool_uncache(cmd, lv, lp);
if (lp->cache)
return _convert_thin_pool_cache(cmd, lv, lp);
if (lp->repair)
return _convert_thin_pool_repair(cmd, lv, lp);
/* FIXME: swapping the thin pool metadata LV needs a specific option like --swapmetadata */
if (arg_is_set(cmd, poolmetadata_ARG))
return _convert_thin_pool_swapmetadata(cmd, lv, lp);
/* FIXME: add --swapmetadata to list of permitted operations. */
log_error("Operation not permitted on thin pool LV %s.", display_lvname(lv));
log_error("Operations permitted on a thin pool LV are:\n"
" --splitcache (operates on cache sub LV)\n"
" --uncache (operates on cache sub LV)\n"
" --type cache (operates on data sub LV)\n"
" --repair\n");
return 0;
}
static int _convert_cache_volume(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
if (lp->splitcache)
return _convert_cache_volume_splitcache(cmd, lv, lp);
if (lp->split)
return _convert_cache_volume_splitcache(cmd, lv, lp);
if (lp->uncache)
return _convert_cache_volume_uncache(cmd, lv, lp);
if (arg_is_set(cmd, splitmirrors_ARG))
return _convert_cache_volume_splitmirrors(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_THIN_POOL) ||
arg_is_set(cmd, thinpool_ARG))
return _convert_cache_volume_thin_pool(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_SNAPSHOT) ||
arg_is_set(cmd, snapshot_ARG))
return _convert_cache_volume_snapshot(cmd, lv, lp);
/* The --thinpool alternative for --type thin-pool is not preferred, so not shown. */
log_error("Operation not permitted on cache LV %s.", display_lvname(lv));
log_error("Operations permitted on a cache LV are:\n"
" --splitcache\n"
" --uncache\n"
" --splitmirrors (operates on mirror or raid sub LV)\n"
" --type thin-pool\n");
return 0;
}
static int _convert_cache_pool(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
if (lp->splitcache)
return _convert_cache_pool_splitcache(cmd, lv, lp);
if (lp->split)
return _convert_cache_pool_splitcache(cmd, lv, lp);
/* FIXME: swapping the cache pool metadata LV needs a specific option like --swapmetadata */
if (arg_is_set(cmd, poolmetadata_ARG))
return _convert_cache_pool_swapmetadata(cmd, lv, lp);
/* FIXME: add --swapmetadata to list of permitted operations. */
log_error("Operation not permitted on cache pool LV %s.", display_lvname(lv));
log_error("Operations permitted on a cache pool LV are:\n"
" --splitcache (operates on cache LV)\n");
return 0;
}
static int _convert_mirror(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
if (arg_is_set(cmd, mirrors_ARG))
return _convert_mirror_number(cmd, lv, lp);
if (arg_is_set(cmd, splitmirrors_ARG))
return _convert_mirror_splitmirrors(cmd, lv, lp);
if (arg_is_set(cmd, mirrorlog_ARG) || arg_is_set(cmd, corelog_ARG))
return _convert_mirror_log(cmd, lv, lp);
if (lp->repair)
return _convert_mirror_repair(cmd, lv, lp);
if (_linear_type_requested(lp->type_str))
return _convert_mirror_linear(cmd, lv, lp);
if (segtype_is_raid(lp->segtype))
return _convert_mirror_raid(cmd, lv, lp);
/*
* FIXME: this is here to preserve old behavior, but an
* explicit option should be added to enable this case,
* rather than making it the result of an ambiguous
* "lvconvert vg/lv" command.
* Add 'lvconvert --poll-mirror vg/lv' for this case.
*
* Old behavior was described as:
* "Collapsing a stack of mirrors.
* If called with no argument, try collapsing the resync layers"
*/
log_debug("Checking if LV %s is converting.", display_lvname(lv));
if (lv_is_converting(lv)) {
lp->need_polling = 1;
return 1;
}
log_error("Operation not permitted on mirror LV %s.", display_lvname(lv));
log_error("Operations permitted on a mirror LV are:\n"
" --mirrors\n"
" --splitmirrors\n"
" --mirrorlog\n"
" --repair\n"
" --type linear\n"
" --type raid*\n");
return 0;
}
static int _convert_raid(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
/* Permitted convert options on visible or hidden RaidLVs */
/* The --thinpool alternative for --type thin-pool is not preferred, so not shown. */
const char *permitted_options = lv_is_visible(lv) ?
" --mirrors\n"
" --splitmirrors\n"
" --merge\n"
" --repair\n"
" --replace\n"
" --type snapshot\n"
" --type thin\n"
" --type cache\n"
" --type thin-pool\n"
" --type cache-pool\n"
" --type raid*\n"
" --type mirror\n"
" --type striped\n"
" --type linear\n"
:
" --mirrors\n"
" --splitmirrors\n"
" --repair\n"
" --replace\n"
" --type raid*\n"
" --type mirror\n"
" --type striped\n"
" --type linear\n";
/* Applicable to any hidden _or_ visible LVs. */
if (arg_is_set(cmd, mirrors_ARG))
return _convert_raid_number(cmd, lv, lp);
if (lp->repair)
return _convert_raid_repair(cmd, lv, lp);
if (arg_is_set(cmd, replace_ARG))
return _convert_raid_replace(cmd, lv, lp);
if (arg_is_set(cmd, splitmirrors_ARG))
return _convert_raid_splitmirrors(cmd, lv, lp);
if (segtype_is_raid(lp->segtype)) {
/* Only --type allowed on hidden RaidLV. */
if (!lv_is_visible(lv) && !arg_is_set(cmd, type_ARG))
goto out;
return _convert_raid_raid(cmd, lv, lp);
}
if (segtype_is_mirror(lp->segtype))
return _convert_raid_mirror(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_STRIPED))
return _convert_raid_striped(cmd, lv, lp);
if (_linear_type_requested(lp->type_str))
return _convert_raid_linear(cmd, lv, lp);
/* Applicable to visible LVs only. */
if (lv_is_visible(lv)) {
if (lp->merge)
return _convert_raid_merge(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_SNAPSHOT) || arg_is_set(cmd, snapshot_ARG))
return _convert_raid_snapshot(cmd, lv, lp);
if (lp->thin)
return _convert_raid_thin(cmd, lv, lp);
if (lp->cache)
return _convert_raid_cache(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_THIN_POOL) ||
arg_is_set(cmd, thinpool_ARG))
return _convert_raid_thin_pool(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_CACHE_POOL) ||
arg_is_set(cmd, cachepool_ARG))
return _convert_raid_cache_pool(cmd, lv, lp);
}
out:
log_error("Operation not permitted on raid LV %s.", display_lvname(lv));
log_error("Operations permitted on a raid LV are:\n%s", permitted_options);
return 0;
}
static int _convert_striped(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
const char *mirrors_type = find_config_tree_str(cmd, global_mirror_segtype_default_CFG, NULL);
/* FIXME: add --merge-mirror to make this distinct from --merge-snapshot. */
if (lp->merge)
return _convert_striped_merge(cmd, lv, lp);
if (lp->snapshot || !strcmp(lp->type_str, SEG_TYPE_NAME_SNAPSHOT))
return _convert_striped_snapshot(cmd, lv, lp);
if (lp->thin)
return _convert_striped_thin(cmd, lv, lp);
if (lp->cache)
return _convert_striped_cache(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_THIN_POOL) ||
arg_is_set(cmd, thinpool_ARG))
return _convert_striped_thin_pool(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_CACHE_POOL) ||
arg_is_set(cmd, cachepool_ARG))
return _convert_striped_cache_pool(cmd, lv, lp);
if (!strcmp(lp->type_str, SEG_TYPE_NAME_MIRROR))
return _convert_striped_mirror(cmd, lv, lp);
if (segtype_is_raid(lp->segtype))
return _convert_striped_raid(cmd, lv, lp);
/* --mirrors can mean --type mirror or --type raid1 depending on config setting. */
if (arg_is_set(cmd, mirrors_ARG) && mirrors_type && !strcmp(mirrors_type, SEG_TYPE_NAME_MIRROR))
return _convert_striped_mirror(cmd, lv, lp);
if (arg_is_set(cmd, mirrors_ARG) && mirrors_type && !strcmp(mirrors_type, SEG_TYPE_NAME_RAID1))
return _convert_striped_raid(cmd, lv, lp);
/* The --thinpool alternative for --type thin-pool is not preferred, so not shown. */
log_error("Operation not permitted on striped or linear LV %s.", display_lvname(lv));
log_error("Operations permitted on a striped or linear LV are:\n"
" --merge\n"
" --type snapshot\n"
" --type thin\n"
" --type cache\n"
" --type thin-pool\n"
" --type cache-pool\n"
" --type mirror\n"
" --type raid*\n");
return 0;
}
/*
* Main entry point.
* lvconvert performs a specific <operation> on a specific <lv_type>.
*
* The <operation> is specified by command line args.
* The <lv_type> is found using lv_is_foo(lv) functions.
*
* for each lvtype,
* _convert_lvtype();
* for each arg_is_set(operation)
* _convert_lvtype_operation();
*
* FIXME: this code (identifying/routing each unique operation through
* _convert_lvtype_op) was designed to work based on the new type that
* the user entered after --type, not the final segment type in lp->type_str.
* Sometimes the two differ because tricks are played with lp->type_str.
* So, when the use of arg_type_str(type_ARG) here was replaced with
* lp->type_str, some commands are no longer identified/routed correctly.
*/
static int _lvconvert(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct lv_segment *seg = first_seg(lv);
int ret = 0;
/*
* Check some conditions that can never be processed.
*/
if (lv_is_locked(lv)) {
log_error("Cannot convert locked LV %s.", display_lvname(lv));
goto out;
}
if (lv_is_pvmove(lv)) {
log_error("Cannot convert pvmove LV %s.", display_lvname(lv));
goto out;
}
if (!lv_is_visible(lv)) {
/*
* FIXME: there are some exceptions to the rule of only
* operating on visible LVs. These should be fixed by running
* the command on the visible LV with an option indicating
* which sub LV is intended rather than naming the !visible LV.
*/
if (!lv_is_cache_pool_metadata(lv) &&
!lv_is_cache_pool_data(lv) &&
!lv_is_thin_pool_metadata(lv) &&
!lv_is_thin_pool_data(lv) &&
!lv_is_used_cache_pool(lv) &&
!lv_is_mirrored(lv) &&
!lv_is_raid(lv)) {
log_error("Cannot convert internal LV %s.", display_lvname(lv));
goto out;
}
}
/* Set up segtype either from type_str or else to match the existing one. */
if (!*lp->type_str)
lp->segtype = seg->segtype;
else if (!(lp->segtype = get_segtype_from_string(cmd, lp->type_str)))
goto_out;
if (!strcmp(lp->type_str, SEG_TYPE_NAME_MIRROR)) {
if (!lp->mirrors_supplied && !seg_is_raid1(seg)) {
log_error("Conversions to --type mirror require -m/--mirrors");
goto out;
}
}
/* lv->segtype can't be NULL */
if (activation() && lp->segtype->ops->target_present &&
!lp->segtype->ops->target_present(cmd, NULL, &lp->target_attr)) {
log_error("%s: Required device-mapper target(s) not "
"detected in your kernel.", lp->segtype->name);
goto out;
}
/* Process striping parameters */
/* FIXME This is incomplete */
if (_mirror_or_raid_type_requested(cmd, lp->type_str) || _raid0_type_requested(lp->type_str) ||
_striped_type_requested(lp->type_str) || lp->repair || lp->mirrorlog || lp->corelog) {
/* FIXME Handle +/- adjustments too? */
if (!get_stripe_params(cmd, lp->segtype, &lp->stripes, &lp->stripe_size, &lp->stripes_supplied, &lp->stripe_size_supplied))
goto_out;
if (_raid0_type_requested(lp->type_str) || _striped_type_requested(lp->type_str))
/* FIXME Shouldn't need to override get_stripe_params which defaults to 1 stripe (i.e. linear)! */
/* The default keeps existing number of stripes, handled inside the library code */
if (!arg_is_set(cmd, stripes_long_ARG))
lp->stripes = 0;
}
if (lp->snapshot)
lp->zero = (lp->segtype->flags & SEG_CANNOT_BE_ZEROED) ? 0 : arg_int_value(cmd, zero_ARG, 1);
/*
* Each LV type that can be converted.
* (The existing type of the LV, not a requested type.)
*/
if (lv_is_cow(lv)) {
ret = _convert_cow_snapshot(cmd, lv, lp);
goto out;
}
if (lv_is_thin_volume(lv)) {
ret = _convert_thin_volume(cmd, lv, lp);
goto out;
}
if (lv_is_thin_pool(lv)) {
ret = _convert_thin_pool(cmd, lv, lp);
goto out;
}
if (lv_is_cache(lv)) {
ret = _convert_cache_volume(cmd, lv, lp);
goto out;
}
if (lv_is_cache_pool(lv)) {
ret = _convert_cache_pool(cmd, lv, lp);
goto out;
}
if (lv_is_mirror(lv)) {
ret = _convert_mirror(cmd, lv, lp);
goto out;
}
if (lv_is_raid(lv)) {
ret = _convert_raid(cmd, lv, lp);
goto out;
}
/*
* FIXME: add lv_is_striped() and lv_is_linear()?
* This does not include raid0 which is caught by the test above.
* If operations differ between striped and linear, split this case.
*/
if (segtype_is_striped(seg->segtype) || segtype_is_linear(seg->segtype)) {
ret = _convert_striped(cmd, lv, lp);
goto out;
}
/*
* The intention is to explicitly check all cases above and never
* reach here, but this covers anything that was missed.
*/
log_error("Cannot convert LV %s.", display_lvname(lv));
out:
return ret ? ECMD_PROCESSED : ECMD_FAILED;
}
static struct convert_poll_id_list* _convert_poll_id_list_create(struct cmd_context *cmd,
const struct logical_volume *lv)
{
struct convert_poll_id_list *idl = (struct convert_poll_id_list *) dm_pool_alloc(cmd->mem, sizeof(struct convert_poll_id_list));
if (!idl) {
log_error("Convert poll ID list allocation failed.");
return NULL;
}
if (!(idl->id = _create_id(cmd, lv->vg->name, lv->name, lv->lvid.s))) {
dm_pool_free(cmd->mem, idl);
return_NULL;
}
idl->is_merging_origin = lv_is_merging_origin(lv);
idl->is_merging_origin_thin = idl->is_merging_origin && seg_is_thin_volume(find_snapshot(lv));
return idl;
}
static int _lvconvert_and_add_to_poll_list(struct cmd_context *cmd,
struct lvconvert_params *lp,
struct logical_volume *lv)
{
int ret;
struct lvinfo info;
struct convert_poll_id_list *idl;
/* _lvconvert() call may alter the reference in lp->lv_to_poll */
if ((ret = _lvconvert(cmd, lv, lp)) != ECMD_PROCESSED)
stack;
else if (lp->need_polling) {
if (!lv_info(cmd, lp->lv_to_poll, 0, &info, 0, 0) || !info.exists)
log_print_unless_silent("Conversion starts after activation.");
else {
if (!(idl = _convert_poll_id_list_create(cmd, lp->lv_to_poll)))
return_ECMD_FAILED;
dm_list_add(&lp->idls, &idl->list);
}
}
return ret;
}
static int _lvconvert_single(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
struct lvconvert_params *lp = (struct lvconvert_params *) handle->custom_handle;
struct volume_group *vg = lv->vg;
if (test_mode() && is_lockd_type(vg->lock_type)) {
log_error("Test mode is not yet supported with lock type %s.",
vg->lock_type);
return ECMD_FAILED;
}
/*
* lp->pvh holds the list of PVs available for allocation or removal
*/
if (lp->pv_count) {
if (!(lp->pvh = create_pv_list(cmd->mem, vg, lp->pv_count, lp->pvs, 0)))
return_ECMD_FAILED;
} else
lp->pvh = &vg->pvs;
if (lp->replace_pv_count &&
!(lp->replace_pvh = create_pv_list(cmd->mem, vg,
lp->replace_pv_count,
lp->replace_pvs, 0)))
return_ECMD_FAILED;
lp->lv_to_poll = lv;
return _lvconvert_and_add_to_poll_list(cmd, lp, lv);
}
static int _lvconvert_merge_single(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
struct lvconvert_params *lp = (struct lvconvert_params *) handle->custom_handle;
lp->lv_to_poll = lv;
return _lvconvert_and_add_to_poll_list(cmd, lp, lv);
}
int lvconvert(struct cmd_context * cmd, int argc, char **argv)
{
int poll_ret, ret;
struct convert_poll_id_list *idl;
struct lvconvert_params lp = {
.conv_type = CONV_OTHER,
.target_attr = ~0,
.idls = DM_LIST_HEAD_INIT(lp.idls),
};
struct processing_handle *handle = init_processing_handle(cmd, NULL);
if (!handle) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lp;
if (!_read_params(cmd, argc, argv, &lp)) {
ret = EINVALID_CMD_LINE;
goto_out;
}
if (lp.merge) {
ret = process_each_lv(cmd, argc, argv, NULL, NULL,
READ_FOR_UPDATE, handle, &_lvconvert_merge_single);
} else {
int saved_ignore_suspended_devices = ignore_suspended_devices();
if (lp.repair || lp.uncache) {
init_ignore_suspended_devices(1);
cmd->handles_missing_pvs = 1;
}
ret = process_each_lv(cmd, 0, NULL, lp.vg_name, lp.lv_name,
READ_FOR_UPDATE, handle, &_lvconvert_single);
init_ignore_suspended_devices(saved_ignore_suspended_devices);
}
dm_list_iterate_items(idl, &lp.idls) {
poll_ret = _lvconvert_poll_by_id(cmd, idl->id,
lp.wait_completion ? 0 : 1U,
idl->is_merging_origin,
idl->is_merging_origin_thin);
if (poll_ret > ret)
ret = poll_ret;
}
out:
if (lp.policy_settings)
dm_config_destroy(lp.policy_settings);
destroy_processing_handle(cmd, handle);
return ret;
}
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