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lvm2/tools/lvconvert.c
Zdenek Kabelac 3e21c8524e gcc-fanalyzer: add extra check for origin_from_cow 
Make analyzer work easier with explicit check for internal error.
2021-09-20 13:58:57 +02:00

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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 "lib/lvmpolld/polldaemon.h"
#include "lib/metadata/lv_alloc.h"
#include "lib/metadata/metadata.h"
#include "lvconvert_poll.h"
#define MAX_PDATA_ARGS 10 /* Max number of accepted args for d-m-p-d tools */
typedef enum {
/* Split:
* 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_MIRRORS = 2,
/* Every other segment type or mirror log conversion we haven't separated out */
CONV_OTHER = 3,
} conversion_type_t;
struct lvconvert_params {
/* Exactly one of these 12 command categories is determined */
int keep_mimages; /* 2 */ /* --splitmirrors */
/* other */ /* 3 */
/* FIXME Eliminate all cases where more than one of the above are set then use conv_type instead */
conversion_type_t conv_type;
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 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;
uint32_t region_size;
unsigned region_size_supplied;
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;
unsigned target_attr;
alloc_policy_t alloc;
int pv_count;
char **pvs;
struct dm_list *pvh;
struct logical_volume *lv_to_poll;
struct dm_list idls;
const char *origin_name;
};
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 _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_params(struct cmd_context *cmd, struct lvconvert_params *lp)
{
const char *vg_name = NULL;
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, trackchanges_ARG))
lp->track_changes = 1;
/*
* 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.
*/
if (arg_is_set(cmd, splitmirrors_ARG)) {
if ((lp->lv_split_name = arg_str_value(cmd, name_ARG, NULL))) {
if (!validate_restricted_lvname_param(cmd, &vg_name, &lp->lv_split_name))
return_0;
}
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;
}
if ((lp->lv_split_name = arg_str_value(cmd, name_ARG, NULL))) {
if (!validate_restricted_lvname_param(cmd, &vg_name, &lp->lv_split_name))
return_0;
}
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;
}
/* If no other case was identified, then use of --stripes means --type striped */
if (!arg_is_set(cmd, type_ARG) && !*lp->type_str &&
!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 ((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) || 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);
/*
* Final checking of each case:
* lp->keep_mimages
* --type mirror|raid lp->mirrorlog lp->corelog
* --type raid0|striped
*/
switch(lp->conv_type) {
case CONV_SPLIT_MIRRORS:
break;
case CONV_OTHER:
if (arg_is_set(cmd, regionsize_ARG)) {
lp->region_size = arg_uint_value(cmd, regionsize_ARG, 0);
lp->region_size_supplied = 1;
} else {
lp->region_size = get_default_region_size(cmd);
lp->region_size_supplied = 0;
}
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 pools.");
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, 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);
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);
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_zalloc(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) {
if (!(region_size = adjusted_mirror_region_size(cmd, lv->vg->extent_size,
lv->le_count,
region_size, 0,
vg_is_clustered(lv->vg))))
return_0;
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("WARNING: %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 (lv->vg->lock_type && !strcmp(lv->vg->lock_type, "sanlock") && lp->keep_mimages) {
/* FIXME: we need to create a sanlock lock on disk for the new LV. */
log_error("Unable to split mirrors in VG with lock_type %s", lv->vg->lock_type);
return 0;
}
/*
* 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);
/* If region size is not given by user - use value from mirror */
if (lv_is_mirrored(lv) && !lp->region_size_supplied) {
lp->region_size = first_seg(lv)->region_size;
log_debug("Copying region size %s from existing mirror.",
display_size(lv->vg->cmd, lp->region_size));
}
/*
* 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);
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,
struct dm_list *pvh)
{
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("WARNING: Logical volume %s is already not mirrored.",
display_lvname(lv));
return 1;
}
if (!(region_size = adjusted_mirror_region_size(cmd, lv->vg->extent_size,
lv->le_count,
lp->region_size ? : seg->region_size, 0,
vg_is_clustered(lv->vg))))
return_0;
if (lv_component_is_active(lv)) {
log_error("Cannot convert logical volume %s with active component LV(s).",
display_lvname(lv));
return 0;
}
if (!operable_pvs)
operable_pvs = pvh;
/*
* Up-convert from linear to mirror
*/
if (!lv_is_mirrored(lv)) {
/* FIXME Share code with lvcreate */
/*
* FIXME should we give not only 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 (!arg_is_set(cmd, background_ARG))
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)) {
/* FIXME: failure inside library -> move error path processing into library. */
layer_lv = seg_lv(first_seg(lv), 0);
if (!remove_layer_from_lv(lv, layer_lv) ||
(lv_is_active(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,
struct dm_list *pvh)
{
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->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("WARNING: 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, pvh))
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;
}
/* Check for raid1 split trackchanges image to reject conversions on it. */
static int _raid_split_image_conversion(struct logical_volume *lv)
{
const char *s;
char raidlv_name[NAME_LEN];
const struct logical_volume *tmp_lv;
if (lv_is_raid_with_tracking(lv)) {
log_error("Conversion of tracking raid1 LV %s is not supported.",
display_lvname(lv));
return 0;
}
if (lv_is_raid_image(lv) &&
(s = strstr(lv->name, "_rimage_"))) {
(void) dm_strncpy(raidlv_name, lv->name, s - lv->name);
if (!(tmp_lv = find_lv(lv->vg, raidlv_name))) {
log_error("Failed to find RaidLV of RAID subvolume %s.",
display_lvname(lv));
return 0;
}
if (lv_is_raid_with_tracking(tmp_lv)) {
log_error("Conversion of tracked raid1 subvolume %s is not supported.",
display_lvname(lv));
return 0;
}
}
return 1;
}
/*
* _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 = 0;
uint32_t old_log_count = 0;
uint32_t new_mimage_count = 0;
uint32_t new_log_count = 0;
if (!_raid_split_image_conversion(lv))
return_0;
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 (!_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))
return 1;
if (!_lvconvert_mirrors_aux(cmd, lv, lp, NULL,
new_mimage_count, new_log_count, lp->pvh))
return_0;
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)
return 1;
/* linear/striped/raid0 <-> striped/raid0/linear (restriping via raid) */
if (segtype_is_striped(from_segtype) && segtype_is_striped(to_segtype))
return 0;
if (from_segtype == 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;
}
/* 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 image_count = 0;
int images_reduced = 0;
int type_enforced = 0;
struct cmd_context *cmd = lv->vg->cmd;
struct lv_segment *seg = first_seg(lv);
if (!_raid_split_image_conversion(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;
}
if (!_lvconvert_validate_thin(lv, lp))
return_0;
if (!_is_valid_raid_conversion(seg->segtype, lp->segtype) &&
!lp->mirrors_supplied)
goto try_new_takeover_or_reshape;
if (seg_is_striped(seg) && !lp->mirrors_supplied)
goto try_new_takeover_or_reshape;
if (seg_is_linear(seg) && !lp->mirrors_supplied)
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;
images_reduced = (image_count < lv_raid_image_count(lv));
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->type_str) {
lp->type_str = SEG_TYPE_NAME_RAID1;
if (!(lp->segtype = get_segtype_from_string(lv->vg->cmd, SEG_TYPE_NAME_RAID1)))
return_0;
type_enforced = 1;
}
}
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->track_changes)
return lv_raid_split_and_track(lv, lp->yes, lp->pvh);
if (lp->keep_mimages)
return lv_raid_split(lv, lp->yes, lp->lv_split_name, image_count, lp->pvh);
if (lp->mirrors_supplied) {
if (seg_is_linear(seg) || seg_is_raid1(seg)) { /* ??? */
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 (!seg_is_raid1(seg) && lv_raid_has_integrity(lv)) {
log_error("Cannot add raid images with integrity for this raid level.");
return 0;
}
if (!lv_raid_change_image_count(lv, lp->yes, image_count,
(lp->region_size_supplied || !seg->region_size) ?
lp->region_size : seg->region_size , lp->pvh))
return_0;
if (lv_raid_has_integrity(lv) && !images_reduced) {
struct integrity_settings *isettings = NULL;
if (!lv_get_raid_integrity_settings(lv, &isettings))
return_0;
if (!lv_add_integrity_to_raid(lv, isettings, lp->pvh, NULL))
return_0;
}
log_print_unless_silent("Logical volume %s successfully converted.",
display_lvname(lv));
return 1;
}
}
goto try_new_takeover_or_reshape;
}
if ((seg_is_linear(seg) || seg_is_striped(seg) || seg_is_mirrored(seg) || lv_is_raid(lv)) &&
(lp->type_str && lp->type_str[0])) {
/* 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 (lv_raid_has_integrity(lv)) {
/* FIXME: which conversions are happening here? */
log_error("This conversion is not supported for raid with integrity.");
return 0;
}
/* FIXME This needs changing globally. */
if (!arg_is_set(cmd, stripes_long_ARG))
lp->stripes = 0;
if (!type_enforced && !arg_is_set(cmd, type_ARG))
lp->segtype = NULL;
if (!arg_is_set(cmd, regionsize_ARG))
lp->region_size = 0;
if (!lv_raid_convert(lv, lp->segtype,
lp->yes, lp->force, lp->stripes, lp->stripe_size_supplied, lp->stripe_size,
lp->region_size, lp->pvh))
return_0;
log_print_unless_silent("Logical volume %s successfully converted.",
display_lvname(lv));
return 1;
}
try_new_takeover_or_reshape:
if (lv_raid_has_integrity(lv)) {
/* FIXME: which conversions are happening here? */
log_error("This conversion is not supported for raid with integrity.");
return 0;
}
if (!_raid4_conversion_supported(lv, lp))
return 0;
/* FIXME This needs changing globally. */
if (!arg_is_set(cmd, stripes_long_ARG))
lp->stripes = 0;
if (!type_enforced && !arg_is_set(cmd, type_ARG))
lp->segtype = NULL;
if (!lv_raid_convert(lv, lp->segtype,
lp->yes, lp->force, lp->stripes, lp->stripe_size_supplied, lp->stripe_size,
(lp->region_size_supplied || !seg->region_size) ?
lp->region_size : seg->region_size , lp->pvh))
return_0;
log_print_unless_silent("Logical volume %s successfully converted.",
display_lvname(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.
*/
/*
* 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);
}
/*
* 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);
}
/*
* 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);
}
/*
* 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);
}
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 (_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);
log_error("Unknown operation on mirror LV %s.", display_lvname(lv));
return 0;
}
static int _convert_raid(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
if (arg_is_set(cmd, mirrors_ARG))
return _convert_raid_number(cmd, lv, lp);
if (arg_is_set(cmd, splitmirrors_ARG))
return _convert_raid_splitmirrors(cmd, lv, lp);
if (segtype_is_raid(lp->segtype))
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);
log_error("Unknown operation on raid LV %s.", display_lvname(lv));
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);
int raid_type = *lp->type_str && !strncmp(lp->type_str, "raid", 4);
if (!raid_type) {
if (!strcmp(lp->type_str, SEG_TYPE_NAME_MIRROR))
return _convert_striped_mirror(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);
if (segtype_is_striped(lp->segtype) || segtype_is_raid(lp->segtype))
return _convert_striped_raid(cmd, lv, lp);
log_error("Unknown operation on striped or linear LV %s.", display_lvname(lv));
return 0;
}
static int _lvconvert_raid_types(struct cmd_context *cmd, struct logical_volume *lv,
struct lvconvert_params *lp)
{
struct lv_segment *seg = first_seg(lv);
int ret = 0;
/* If LV is inactive here, ensure it's not active elsewhere. */
if (!lockd_lv(cmd, lv, "ex", 0))
return_ECMD_FAILED;
/* 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->mirrorlog || lp->corelog) {
if (!arg_is_set(cmd, type_ARG))
lp->segtype = first_seg(lv)->segtype;
/* 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 (lv_is_cache(lv))
lv = seg_lv(first_seg(lv), 0);
if (lv_is_vdo_pool(lv))
return _lvconvert_raid_types(cmd, seg_lv(first_seg(lv), 0), lp);
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 int _lvconvert_splitsnapshot(struct cmd_context *cmd, struct logical_volume *cow)
{
struct volume_group *vg = cow->vg;
const char *cow_name = display_lvname(cow);
if (!lv_is_cow(cow)) {
log_error(INTERNAL_ERROR "Volume %s is not a COW.", 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 (vg_is_shared(vg)) {
/* 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 (lv_is_active(cow)) {
if (!lv_check_not_in_use(cow, 1))
return_0;
if ((arg_count(cmd, force_ARG) == PROMPT) &&
!arg_count(cmd, yes_ARG) &&
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;
}
}
}
log_verbose("Splitting snapshot %s from its origin.", display_lvname(cow));
if (!vg_remove_snapshot(cow))
return_0;
log_print_unless_silent("Logical Volume %s split from its origin.", display_lvname(cow));
return 1;
}
static int _lvconvert_split_and_keep_cachevol(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *lv_fast)
{
char cvol_name[NAME_LEN];
struct lv_segment *cache_seg = first_seg(lv);
int cache_mode = cache_seg->cache_mode;
int direct_detach = 0;
if (!archive(lv->vg))
return_0;
log_debug("Detaching cachevol %s from LV %s.", display_lvname(lv_fast), display_lvname(lv));
/*
* Allow forcible detach without activating or flushing
* in case the cache is corrupt/damaged/invalid.
* This would generally be done to rescue data from
* the origin if the cache could not be repaired.
*/
if (!lv_is_active(lv) && arg_count(cmd, force_ARG))
direct_detach = 1;
/*
* Detaching a writeback cache generally requires flushing;
* doing otherwise can mean data loss/corruption.
* If the cache devices are missing, the cache can't be
* flushed, so require the user to use a force option to
* detach the cache in this case.
*/
if ((cache_mode != CACHE_MODE_WRITETHROUGH) && lv_is_partial(lv_fast)) {
if (!arg_count(cmd, force_ARG)) {
log_warn("WARNING: writeback cache on %s is not complete and cannot be flushed.", display_lvname(lv_fast));
log_warn("WARNING: cannot detach writeback cache from %s without --force.", display_lvname(lv));
log_error("Conversion aborted.");
return 0;
}
direct_detach = 1;
}
if (direct_detach) {
log_warn("WARNING: Data may be lost by detaching writeback cache without flushing.");
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt("Detach writeback cache %s from %s without flushing data?",
display_lvname(lv_fast), display_lvname(lv)) == 'n') {
log_error("Conversion aborted.");
return 0;
}
/* Switch internally to WRITETHROUGH which does not require flushing */
cache_seg->cache_mode = CACHE_MODE_WRITETHROUGH;
}
if (!lv_cache_remove(lv))
return_0;
/* Cut off suffix _cvol */
if (!drop_lvname_suffix(cvol_name, lv_fast->name, "cvol")) {
/* likely older instance of metadata */
log_debug("LV %s has no suffix for cachevol (skipping rename).",
display_lvname(lv_fast));
} else if (!lv_uniq_rename_update(cmd, lv_fast, cvol_name, 0))
return_0;
if (!vg_write(lv->vg) || !vg_commit(lv->vg))
return_0;
return 1;
}
static int _lvconvert_split_and_remove_cachevol(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *lv_fast)
{
if (!_lvconvert_split_and_keep_cachevol(cmd, lv, lv_fast))
return_0;
if (lvremove_single(cmd, lv_fast, NULL) != ECMD_PROCESSED)
return_0;
return 1;
}
static int _lvconvert_split_and_keep_cachepool(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *lv_fast)
{
char name[NAME_LEN];
if (!archive(lv->vg))
return_0;
log_debug("Detaching cachepool %s from LV %s.", display_lvname(lv_fast), display_lvname(lv));
if (vg_missing_pv_count(lv->vg)) {
log_error("Cannot split cache pool while PVs are missing, see --uncache to delete cache pool.");
return 0;
}
if (!lv_cache_remove(lv))
return_0;
/* Cut off suffix _cpool */
if (!drop_lvname_suffix(name, lv_fast->name, "cpool")) {
/* likely older instance of metadata */
log_debug("LV %s has no suffix for cachepool (skipping rename).",
display_lvname(lv_fast));
} else if (!lv_uniq_rename_update(cmd, lv_fast, name, 0))
return_0;
if (!vg_write(lv->vg) || !vg_commit(lv->vg))
return_0;
log_print_unless_silent("Logical volume %s is not cached and %s is unused.",
display_lvname(lv), display_lvname(lv_fast));
return 1;
}
static int _lvconvert_split_and_remove_cachepool(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *cachepool_lv)
{
struct lv_segment *seg;
struct logical_volume *remove_lv;
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 (!arg_count(cmd, force_ARG)) {
log_error("Conversion aborted.");
log_error("Cannot uncache writeback cache volume %s without --force.",
display_lvname(lv));
return 0;
}
log_warn("WARNING: Uncaching of partially missing %s cache volume %s might destroy your data.",
cache_mode_num_to_str(first_seg(seg->pool_lv)->cache_mode), display_lvname(lv));
}
if (!arg_count(cmd, yes_ARG) &&
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;
}
}
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,
const char *origin_name)
{
struct logical_volume *org;
const char *snap_name = display_lvname(lv);
uint32_t chunk_size;
int zero;
if (strcmp(lv->name, origin_name) == 0) {
log_error("Unable to use %s as both snapshot and origin.", snap_name);
return 0;
}
chunk_size = arg_uint_value(cmd, chunksize_ARG, 8);
if (chunk_size < 8 || chunk_size > 1024 || !is_power_of_2(chunk_size)) {
log_error("Chunk size must be a power of 2 in the range 4K to 512K.");
return 0;
}
if (!cow_has_min_chunks(lv->vg, lv->le_count, chunk_size))
return_0;
log_verbose("Setting chunk size to %s.", display_size(cmd, chunk_size));
if (!(org = find_lv(lv->vg, origin_name))) {
log_error("Couldn't find origin volume %s in Volume group %s.",
origin_name, lv->vg->name);
return 0;
}
/*
* check_lv_rules() checks cannot be done via command definition
* rules because this LV is not processed by process_each_lv.
*/
/*
* check_lv_types() checks cannot be done via command definition
* LV_foo specification because this LV is not processed by process_each_lv.
*/
if (!validate_snapshot_origin(org))
return_0;
if (lv_component_is_active(org)) {
log_error("Cannot use logical volume %s with active component LVs for snapshot origin.",
display_lvname(org));
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 (!arg_count(cmd, yes_ARG) &&
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 (first_seg(lv)->segtype->flags & SEG_CANNOT_BE_ZEROED)
zero = 0;
else
zero = arg_int_value(cmd, zero_ARG, 1);
if (!zero || !(lv->status & LVM_WRITE))
log_warn("WARNING: %s not zeroed.", snap_name);
else if (!activate_and_wipe_lv(lv, 0)) {
log_error("Aborting. Failed to wipe snapshot exception store.");
return 0;
}
if (!archive(lv->vg))
return_0;
if (!vg_add_snapshot(org, lv, NULL, org->le_count, 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 logical_volume **lv_to_poll)
{
int merge_on_activate = 0;
struct logical_volume *origin;
struct lv_segment *snap_seg = find_snapshot(lv);
struct lvinfo info;
dm_percent_t snap_percent;
if (!snap_seg)
return_0;
origin = origin_from_cow(lv);
/* Check if merge is possible */
if (lv_is_merging_origin(origin)) {
log_error("Cannot merge snapshot %s into the origin %s "
"with merging snapshot %s.",
display_lvname(lv), display_lvname(origin),
display_lvname(snap_seg->lv));
return 0;
}
if (lv_is_external_origin(origin)) {
log_error("Cannot merge snapshot %s into "
"the read-only external origin %s.",
display_lvname(lv), display_lvname(origin));
return 0;
}
if (!(origin->status & LVM_WRITE)) {
log_error("Cannot merge snapshot %s into "
"the read-only origin %s. (Use lvchange -p rw).",
display_lvname(lv), display_lvname(origin));
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.",
display_lvname(lv));
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(origin)) {
if (!lv_check_not_in_use(origin, 0)) {
log_print_unless_silent("Delaying merge since origin is open.");
merge_on_activate = 1;
} else if (!lv_check_not_in_use(lv, 0)) {
log_print_unless_silent("Delaying merge since 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;
} 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)) {
/* Race during table reload prevented merging */
merge_on_activate = 1;
} else if (!lv_info(cmd, origin, 0, &info, 0, 0) || !info.exists) {
log_print_unless_silent("Conversion starts after activation.");
merge_on_activate = 1;
} else {
*lv_to_poll = origin;
}
}
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)
{
int origin_is_active = 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("Cannot merge snapshot %s into the origin %s "
"with merging snapshot %s.",
display_lvname(lv), display_lvname(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))
return_0;
log_print_unless_silent("Volume %s replaced origin %s.",
display_lvname(origin), display_lvname(lv));
if (origin_is_active && !activate_lv(cmd, lv)) {
log_error("Failed to reactivate origin %s.",
display_lvname(lv));
return 0;
}
return 1;
}
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;
log_print_unless_silent("Merging of thin snapshot %s will occur on "
"next activation of %s.",
display_lvname(lv), display_lvname(origin));
return 1;
}
static int _lvconvert_thin_pool_repair(struct cmd_context *cmd,
struct logical_volume *pool_lv,
struct dm_list *pvh, int poolmetadataspare)
{
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[MAX_PDATA_ARGS + 7]; /* Max supported 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, 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 < MAX_PDATA_ARGS; 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 >= MAX_PDATA_ARGS) {
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("Active pools cannot be repaired. Use lvchange -an first.");
return 0;
}
if (!activate_lv(cmd, pmslv)) {
log_error("Cannot activate pool metadata spare volume %s.",
pmslv->name);
return 0;
}
if (!activate_lv(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;
}
/* Check matching transactionId when thin-pool is used by lvm2 (transactionId != 0) */
if (first_seg(pool_lv)->transaction_id && 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.",
display_lvname(mlv));
ret = 0;
}
deactivate_pmslv:
if (!deactivate_lv(cmd, pmslv)) {
log_error("Cannot deactivate pool metadata spare volume %s.",
display_lvname(pmslv));
ret = 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, pvh, 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: LV %s holds a backup of the unrepaired metadata. Use lvremove when no longer required.",
display_lvname(mlv));
if (dm_list_size(&pool_lv->vg->pvs) > 1)
log_warn("WARNING: New metadata LV %s might use different PVs. Move it with pvmove if required.",
display_lvname(first_seg(pool_lv)->metadata_lv));
return 1;
}
/* TODO: lots of similar code with thinpool repair
* investigate possible better code sharing...
*/
static int _lvconvert_cache_repair(struct cmd_context *cmd,
struct logical_volume *cache_lv,
struct dm_list *pvh, int poolmetadataspare)
{
const char *dmdir = dm_dir();
const char *cache_repair =
find_config_tree_str_allow_empty(cmd, global_cache_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[MAX_PDATA_ARGS + 7]; /* Max supported args */
char *dm_name;
char meta_path[PATH_MAX];
char pms_path[PATH_MAX];
struct logical_volume *pool_lv;
struct logical_volume *pmslv;
struct logical_volume *mlv;
if (lv_is_cache(cache_lv) && lv_is_cache_vol(first_seg(cache_lv)->pool_lv)) {
log_error("Manual repair required.");
return 0;
}
pool_lv = lv_is_cache_pool(cache_lv) ? cache_lv : first_seg(cache_lv)->pool_lv;
mlv = first_seg(pool_lv)->metadata_lv;
if (!cache_repair || !cache_repair[0]) {
log_error("Cache repair commnand is not configured. Repair is disabled.");
return 0; /* Checking disabled */
}
pmslv = cache_lv->vg->pool_metadata_spare_lv;
/* Check we have pool metadata spare LV */
if (!handle_pool_metadata_spare(cache_lv->vg, 0, pvh, 1))
return_0;
if (pmslv != cache_lv->vg->pool_metadata_spare_lv) {
if (!vg_write(cache_lv->vg) || !vg_commit(cache_lv->vg))
return_0;
pmslv = cache_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 cache 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_cache_repair_options_CFG, NULL))) {
log_error(INTERNAL_ERROR "Unable to find configuration for global/cache_repair_options");
return 0;
}
for (cv = cn->v; cv && args < MAX_PDATA_ARGS; cv = cv->next) {
if (cv->type != DM_CFG_STRING) {
log_error("Invalid string in config file: "
"global/cache_repair_options");
return 0;
}
argv[++args] = cv->v.str;
}
if (args >= MAX_PDATA_ARGS) {
log_error("Too many options for cache repair command.");
return 0;
}
argv[0] = cache_repair;
argv[++args] = "-i";
argv[++args] = meta_path;
argv[++args] = "-o";
argv[++args] = pms_path;
argv[++args] = NULL;
if (lv_is_active(cache_lv)) {
log_error("Only inactive cache can be repaired.");
return 0;
}
if (!activate_lv(cmd, pmslv)) {
log_error("Cannot activate pool metadata spare volume %s.",
pmslv->name);
return 0;
}
if (!activate_lv(cmd, mlv)) {
log_error("Cannot activate cache pool metadata volume %s.",
mlv->name);
goto deactivate_pmslv;
}
if (!(ret = exec_cmd(cmd, (const char * const *)argv, &status, 1))) {
log_error("Repair of cache metadata volume of cache %s failed (status:%d). "
"Manual repair required!",
display_lvname(cache_lv), status);
goto deactivate_mlv;
}
/* TODO: any active validation of cache-pool metadata? */
deactivate_mlv:
if (!sync_local_dev_names(cmd)) {
log_error("Failed to sync local devices before deactivating LV %s.",
display_lvname(mlv));
return 0;
}
if (!deactivate_lv(cmd, mlv)) {
log_error("Cannot deactivate pool metadata volume %s.",
display_lvname(mlv));
ret = 0;
}
deactivate_pmslv:
if (!sync_local_dev_names(cmd)) {
log_error("Failed to sync local devices before deactivating LV %s.",
display_lvname(pmslv));
return 0;
}
if (!deactivate_lv(cmd, pmslv)) {
log_error("Cannot deactivate pool metadata spare volume %s.",
display_lvname(pmslv));
ret = 0;
}
if (!ret)
return 0;
if (pmslv == cache_lv->vg->pool_metadata_spare_lv) {
cache_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(cache_lv->vg, 0, pvh, poolmetadataspare))
stack;
if (dm_snprintf(meta_path, sizeof(meta_path), "%s_meta%%d", cache_lv->name) < 0) {
log_error("Can't prepare new metadata name for %s.", cache_lv->name);
return 0;
}
if (!generate_lv_name(cache_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 _cmeta name */
if (!swap_lv_identifiers(cmd, mlv, pmslv))
return_0;
if (!attach_pool_metadata_lv(first_seg(pool_lv), pmslv))
return_0;
/* Used _cmeta (now _pmspare) becomes _meta%d */
if (!lv_rename_update(cmd, mlv, pms_path, 0))
return_0;
if (!vg_write(cache_lv->vg) || !vg_commit(cache_lv->vg))
return_0;
/* FIXME: just as with thinpool repair - fix the warning
* where moving doesn't make any sense (same disk storage)
*/
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;
}
static int _lvconvert_to_thin_with_external(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *thinpool_lv)
{
struct volume_group *vg = lv->vg;
struct logical_volume *thin_lv;
const char *origin_name;
struct lvcreate_params lvc = {
.activate = CHANGE_AEY,
.alloc = ALLOC_INHERIT,
.major = -1,
.minor = -1,
.suppress_zero_warn = 1, /* Suppress warning for this thin */
.permission = LVM_READ,
.pool_name = thinpool_lv->name,
.pvh = &vg->pvs,
.read_ahead = DM_READ_AHEAD_AUTO,
.stripes = 1,
.virtual_extents = lv->le_count,
};
if (!_raid_split_image_conversion(lv))
return_0;
if (lv == thinpool_lv) {
log_error("Can't use same LV %s for thin pool and thin volume.",
display_lvname(thinpool_lv));
return 0;
}
if ((origin_name = arg_str_value(cmd, originname_ARG, NULL)))
if (!validate_restricted_lvname_param(cmd, &vg->name, &origin_name))
return_0;
/*
* If NULL, an auto-generated 'lvol' name is used.
* If set, the lv create code checks the name isn't used.
*/
lvc.lv_name = origin_name;
if (vg_is_shared(vg)) {
/*
* 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.",
vg->lock_type);
return 0;
}
dm_list_init(&lvc.tags);
if (!pool_supports_external_origin(first_seg(thinpool_lv), lv))
return_0;
if (!(lvc.segtype = get_segtype_from_string(cmd, SEG_TYPE_NAME_THIN)))
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.
*
* The new thin LV is created with the origin_name, or an autogenerated
* 'lvol' name. Then the names and ids are swapped between the thin LV
* and the original/external LV. So, the thin LV gets the name and id
* of the original LV arg, and the original LV arg gets the origin_name
* or the autogenerated name.
*/
if (!(thin_lv = lv_create_single(vg, &lvc)))
return_0;
if (!deactivate_lv(cmd, thin_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, thin_lv, lv)) {
stack;
goto revert_new_lv;
}
/* Preserve read-write status of original LV here */
thin_lv->status |= (lv->status & LVM_WRITE);
if (!attach_thin_external_origin(first_seg(thin_lv), lv)) {
stack;
goto revert_new_lv;
}
if (!lv_update_and_reload(thin_lv)) {
stack;
goto deactivate_and_revert_new_lv;
}
log_print_unless_silent("Converted %s to thin volume with external origin %s.",
display_lvname(thin_lv), display_lvname(lv));
return 1;
deactivate_and_revert_new_lv:
if (!swap_lv_identifiers(cmd, thin_lv, lv))
stack;
if (!deactivate_lv(cmd, thin_lv)) {
log_error("Unable to deactivate failed new LV. "
"Manual intervention required.");
return 0;
}
if (!detach_thin_external_origin(first_seg(thin_lv)))
return_0;
revert_new_lv:
/* FIXME Better to revert to backup of metadata? */
if (!lv_remove(thin_lv) || !vg_write(vg) || !vg_commit(vg))
log_error("Manual intervention may be required to remove "
"abandoned LV(s) before retrying.");
return 0;
}
static int _lvconvert_swap_pool_metadata(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *metadata_lv)
{
struct volume_group *vg = lv->vg;
struct logical_volume *prev_metadata_lv;
struct lv_segment *seg;
struct lv_type *lvtype;
char meta_name[NAME_LEN];
const char *swap_name;
uint32_t chunk_size;
int is_thinpool;
int is_cachepool;
int lvt_enum;
is_thinpool = lv_is_thin_pool(lv);
is_cachepool = lv_is_cache_pool(lv);
lvt_enum = get_lvt_enum(metadata_lv);
lvtype = get_lv_type(lvt_enum);
if (lvt_enum != striped_LVT && lvt_enum != linear_LVT && lvt_enum != raid_LVT) {
log_error("LV %s with type %s cannot be used as a metadata LV.",
display_lvname(metadata_lv), lvtype ? lvtype->name : "unknown");
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_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;
}
/* FIXME cache pool */
if (is_thinpool && pool_is_active(lv)) {
/* If any volume referencing pool active - abort here */
log_error("Cannot convert pool %s with active volumes.",
display_lvname(lv));
return 0;
}
if ((dm_snprintf(meta_name, sizeof(meta_name), "%s%s", lv->name, is_cachepool ? "_cmeta" : "_tmeta") < 0)) {
log_error("Failed to create internal lv names, pool name is too long.");
return 0;
}
seg = first_seg(lv);
/* Normally do NOT change chunk size when swapping */
if (arg_is_set(cmd, chunksize_ARG)) {
chunk_size = arg_uint_value(cmd, chunksize_ARG, 0);
if ((chunk_size != seg->chunk_size) && !dm_list_empty(&lv->segs_using_this_lv)) {
if (arg_count(cmd, force_ARG) == PROMPT) {
log_error("Chunk size can be only changed with --force. Conversion aborted.");
return 0;
}
if (!validate_pool_chunk_size(cmd, seg->segtype, chunk_size))
return_0;
log_warn("WARNING: Changing chunk size %s to %s for %s pool volume.",
display_size(cmd, seg->chunk_size),
display_size(cmd, chunk_size),
display_lvname(lv));
/* Ok, user has likely some serious reason for this */
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt("Do you really want to change chunk size for %s pool volume? [y/n]: ",
display_lvname(lv)) == 'n') {
log_error("Conversion aborted.");
return 0;
}
}
seg->chunk_size = chunk_size;
}
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt("Do you want to swap metadata of %s pool with metadata volume %s? [y/n]: ",
display_lvname(lv),
display_lvname(metadata_lv)) == 'n') {
log_error("Conversion aborted.");
return 0;
}
if (!deactivate_lv(cmd, metadata_lv)) {
log_error("Aborting. Failed to deactivate %s.",
display_lvname(metadata_lv));
return 0;
}
/* Swap names between old and new metadata LV */
if (!detach_pool_metadata_lv(seg, &prev_metadata_lv))
return_0;
swap_name = metadata_lv->name;
if (!lv_rename_update(cmd, metadata_lv, "pvmove_tmeta", 0))
return_0;
/* Give the previous metadata LV the name of the LV replacing it. */
if (!lv_rename_update(cmd, prev_metadata_lv, swap_name, 0))
return_0;
/* Rename deactivated metadata LV to have _tmeta suffix */
if (!lv_rename_update(cmd, metadata_lv, meta_name, 0))
return_0;
if (!attach_pool_metadata_lv(seg, metadata_lv))
return_0;
if (!vg_write(vg) || !vg_commit(vg))
return_0;
return 1;
}
/*
* Create a new pool LV, using the lv arg as the data sub LV.
* The metadata sub LV is either a new LV created here, or an
* existing LV specified by --poolmetadata.
*
* process_single_lv is the LV currently being processed by
* process_each_lv(). It will sometimes be the same as the
* lv arg, and sometimes not.
*/
static int _lvconvert_to_pool(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *process_single_lv,
int to_thinpool,
int to_cachepool,
struct dm_list *use_pvh)
{
struct volume_group *vg = lv->vg;
struct logical_volume *metadata_lv = NULL; /* existing or created */
struct logical_volume *data_lv; /* lv arg renamed */
struct logical_volume *pool_lv; /* new lv created here */
const char *pool_metadata_name; /* user-specified lv name */
const char *pool_name; /* name of original lv arg */
char meta_name[NAME_LEN]; /* generated sub lv name */
char data_name[NAME_LEN]; /* generated sub lv name */
char converted_names[3*NAME_LEN]; /* preserve names of converted lv */
struct segment_type *pool_segtype; /* thinpool or cachepool */
struct lv_segment *seg;
unsigned int target_attr = ~0;
unsigned int activate_pool;
unsigned int zero_metadata;
uint64_t meta_size;
uint32_t meta_extents;
uint32_t chunk_size;
int chunk_calc;
cache_metadata_format_t cache_metadata_format;
cache_mode_t cache_mode;
const char *policy_name;
struct dm_config_tree *policy_settings = NULL;
int pool_metadata_spare;
thin_crop_metadata_t crop_metadata;
thin_discards_t discards;
thin_zero_t zero_new_blocks;
int error_when_full;
int r = 0;
/* for handling lvmlockd cases */
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;
const char *str_seg_type = to_cachepool ? SEG_TYPE_NAME_CACHE_POOL : SEG_TYPE_NAME_THIN_POOL;
if (!_raid_split_image_conversion(lv))
return_0;
if (lv_is_thin_pool(lv) || lv_is_cache_pool(lv)) {
log_error(INTERNAL_ERROR "LV %s is already a pool.", display_lvname(lv));
return 0;
}
pool_segtype = get_segtype_from_string(cmd, str_seg_type);
if (!pool_segtype ||
!pool_segtype->ops->target_present(cmd, NULL, &target_attr)) {
log_error("%s: Required device-mapper target(s) not detected in your kernel.",
str_seg_type);
return 0;
}
/* Allow to have only thinpool active and restore it's active state. */
activate_pool = to_thinpool && lv_is_active(lv);
/* Wipe metadata_lv by default, but allow skipping this for cache pools. */
zero_metadata = (to_cachepool) ? arg_int_value(cmd, zero_ARG, 1) : 1;
/* An existing LV needs to have its lock freed once it becomes a data LV. */
if (vg_is_shared(vg) && lv->lock_args) {
lockd_data_args = dm_pool_strdup(cmd->mem, lv->lock_args);
lockd_data_name = dm_pool_strdup(cmd->mem, lv->name);
memcpy(&lockd_data_id, &lv->lvid.id[1], sizeof(struct id));
}
/*
* The internal LV names for pool data/meta LVs.
*/
if ((dm_snprintf(meta_name, sizeof(meta_name), "%s%s", lv->name, to_cachepool ? "_cmeta" : "_tmeta") < 0) ||
(dm_snprintf(data_name, sizeof(data_name), "%s%s", lv->name, to_cachepool ? "_cdata" : "_tdata") < 0)) {
log_error("Failed to create internal lv names, pool name is too long.");
return 0;
}
/* If LV is inactive here, ensure it's not active elsewhere. */
if (!lockd_lv(cmd, lv, "ex", 0))
return 0;
/*
* If an existing LV is to be used as the metadata LV,
* verify that it's in a usable state. These checks are
* not done by command def rules because this LV is not
* processed by process_each_lv.
*/
if ((pool_metadata_name = arg_str_value(cmd, poolmetadata_ARG, NULL))) {
if (!validate_lvname_param(cmd, &vg->name, &pool_metadata_name)) {
log_error("Metadata LV %s not found.", pool_metadata_name);
return 0;
}
if (!(metadata_lv = find_lv(vg, pool_metadata_name))) {
log_error("Unknown pool metadata LV %s.", pool_metadata_name);
return 0;
}
/* An existing LV needs to have its lock freed once it becomes a meta LV. */
if (vg_is_shared(vg) && 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 == lv) {
log_error("Can't use same LV for pool data and metadata LV %s.",
display_lvname(metadata_lv));
return 0;
}
if (metadata_lv == process_single_lv) {
log_error("Use a different LV for pool metadata %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. (Use a type whitelist?) */
if (lv_is_cache_type(metadata_lv) ||
lv_is_writecache(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 inactive here, ensure it's not active elsewhere. */
if (!lockd_lv(cmd, metadata_lv, "ex", 0))
return 0;
}
if (!get_pool_params(cmd, pool_segtype,
&meta_size, &pool_metadata_spare,
&chunk_size, &discards, &zero_new_blocks))
goto_bad;
if (to_cachepool &&
!get_cache_params(cmd, &chunk_size, &cache_metadata_format, &cache_mode, &policy_name, &policy_settings))
goto_bad;
if (metadata_lv)
meta_extents = metadata_lv->le_count;
else if (meta_size)
meta_extents = extents_from_size(cmd, meta_size, vg->extent_size);
else
meta_extents = 0; /* A default will be chosen by the "update" function. */
/*
* Validate and/or choose defaults for meta_extents and chunk_size,
* this involves some complicated calculations.
*/
if (to_cachepool) {
if (!update_cache_pool_params(cmd, vg->profile, vg->extent_size,
pool_segtype, target_attr,
lv->le_count,
&meta_extents,
metadata_lv,
&chunk_calc,
&chunk_size))
goto_bad;
} else {
if (!update_thin_pool_params(cmd, vg->profile, vg->extent_size,
pool_segtype, target_attr,
lv->le_count,
&meta_extents,
metadata_lv,
&crop_metadata,
&chunk_calc,
&chunk_size,
&discards, &zero_new_blocks))
goto_bad;
}
if (metadata_lv && (meta_extents > metadata_lv->le_count)) {
log_error("Pool metadata LV %s is too small (%u extents) for required metadata (%u extents).",
display_lvname(metadata_lv), metadata_lv->le_count, meta_extents);
goto bad;
}
log_verbose("Pool metadata extents %u chunk_size %u", meta_extents, chunk_size);
(void) dm_snprintf(converted_names, sizeof(converted_names), "%s%s%s",
display_lvname(lv),
metadata_lv ? " and " : "",
metadata_lv ? display_lvname(metadata_lv) : "");
/*
* Verify that user wants to use these LVs.
*/
log_warn("WARNING: Converting %s to %s pool's data%s %s metadata wiping.",
converted_names,
to_cachepool ? "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 if (to_cachepool)
log_warn("WARNING: Using mismatched cache pool metadata MAY DESTROY YOUR DATA!");
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt("Do you really want to convert %s? [y/n]: ",
converted_names) == 'n') {
log_error("Conversion aborted.");
goto bad;
}
/*
* If a new metadata LV needs to be created, collect the settings for
* the new LV and create it.
*
* If an existing LV is used for metadata, deactivate/activate/wipe it.
*/
if (!metadata_lv) {
uint32_t meta_stripes;
uint32_t meta_stripe_size;
uint32_t meta_readahead;
alloc_policy_t meta_alloc;
unsigned meta_stripes_supplied;
unsigned meta_stripe_size_supplied;
if (!get_stripe_params(cmd, get_segtype_from_string(cmd, SEG_TYPE_NAME_STRIPED),
&meta_stripes,
&meta_stripe_size,
&meta_stripes_supplied,
&meta_stripe_size_supplied))
goto_bad;
meta_readahead = arg_uint_value(cmd, readahead_ARG, cmd->default_settings.read_ahead);
meta_alloc = (alloc_policy_t) arg_uint_value(cmd, alloc_ARG, ALLOC_INHERIT);
if (!(metadata_lv = alloc_pool_metadata(lv,
meta_name,
meta_readahead,
meta_stripes,
meta_stripe_size,
meta_extents,
meta_alloc,
use_pvh)))
goto_bad;
} else {
if (!deactivate_lv(cmd, metadata_lv)) {
log_error("Aborting. Failed to deactivate %s.",
display_lvname(metadata_lv));
goto bad;
}
if (zero_metadata) {
metadata_lv->status |= LV_ACTIVATION_SKIP;
if (!activate_lv(cmd, metadata_lv)) {
log_error("Aborting. Failed to activate metadata lv.");
goto bad;
}
metadata_lv->status &= ~LV_ACTIVATION_SKIP;
if (!wipe_lv(metadata_lv, (struct wipe_params) {
.do_wipe_signatures = 1,
.is_metadata = 1,
.yes = arg_count(cmd, yes_ARG),
.force = arg_count(cmd, force_ARG) } )) {
log_error("Aborting. Failed to wipe metadata lv.");
goto bad;
}
}
}
/*
* Deactivate the data LV and metadata LV.
* 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.");
goto bad;
}
if (!deactivate_lv(cmd, lv)) {
log_error("Aborting. Failed to deactivate logical volume %s.",
display_lvname(lv));
goto bad;
}
/*
* When the LV referenced by the original function arg "lv"
* is renamed, it is then referenced as "data_lv".
*
* pool_name pool name taken from lv arg
* data_name sub lv name, generated
* meta_name sub lv name, generated
*
* pool_lv new lv for pool object, created here
* data_lv sub lv, was lv arg, now renamed
* metadata_lv sub lv, existing or created here
*/
data_lv = lv;
pool_name = lv->name; /* Use original LV name for pool name */
/*
* Rename the original LV arg to the internal data LV naming scheme.
*
* 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))
goto_bad;
/*
* Create LV structures for the new pool LV object,
* and connect it to the data/meta LVs.
*/
if (!(pool_lv = lv_create_empty(pool_name, NULL,
(to_cachepool ? CACHE_POOL : THIN_POOL) | VISIBLE_LV | LVM_READ | LVM_WRITE,
ALLOC_INHERIT, vg))) {
log_error("Creation of pool LV failed.");
goto bad;
}
/* Allocate a new pool segment */
if (!(seg = alloc_lv_segment(pool_segtype, pool_lv, 0, data_lv->le_count, 0,
pool_lv->status, 0, NULL, 1,
data_lv->le_count, 0, 0, 0, 0, NULL)))
goto_bad;
/* 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))
goto_bad;
/*
* 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 (vg_is_shared(vg)) {
if (to_cachepool) {
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";
else if (!strcmp(vg->lock_type, "idm"))
pool_lv->lock_args = "idm";
/* The lock_args will be set in vg_write(). */
}
}
/* Apply settings to the new pool seg */
if (to_cachepool) {
if (!cache_set_params(seg, chunk_size, cache_metadata_format, cache_mode, policy_name, policy_settings))
goto_bad;
} else {
seg->transaction_id = 0;
seg->crop_metadata = crop_metadata;
seg->chunk_size = chunk_size;
seg->discards = discards;
seg->zero_new_blocks = zero_new_blocks;
if (crop_metadata == THIN_CROP_METADATA_NO)
pool_lv->status |= LV_CROP_METADATA;
if (!recalculate_pool_chunk_size_with_dev_hints(pool_lv, chunk_calc))
goto_bad;
/* Error when full */
if (arg_is_set(cmd, errorwhenfull_ARG))
error_when_full = arg_uint_value(cmd, errorwhenfull_ARG, 0);
else
error_when_full = find_config_tree_bool(cmd, activation_error_when_full_CFG, vg->profile);
if (error_when_full)
pool_lv->status |= LV_ERROR_WHEN_FULL;
}
/*
* Rename deactivated metadata LV to have _tmeta suffix.
* Implicit checks if metadata_lv is visible.
*/
if (pool_metadata_name &&
!lv_rename_update(cmd, metadata_lv, meta_name, 0))
goto_bad;
if (!attach_pool_metadata_lv(seg, metadata_lv))
goto_bad;
if (!handle_pool_metadata_spare(vg,
metadata_lv->le_count,
use_pvh, pool_metadata_spare))
goto_bad;
if (!vg_write(vg) || !vg_commit(vg))
goto_bad;
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(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;
out:
if (r)
log_print_unless_silent("Converted %s to %s pool.",
converted_names, to_cachepool ? "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);
}
bad:
if (policy_settings)
dm_config_destroy(policy_settings);
return r;
#if 0
revert_new_lv:
/* TBD */
if (!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.");
}
return 0;
#endif
}
static int _cache_vol_attach(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *lv_fast)
{
char cvol_name[NAME_LEN];
struct volume_group *vg = lv->vg;
struct logical_volume *cache_lv;
uint32_t chunk_size = 0;
uint64_t poolmetadatasize = 0;
cache_metadata_format_t cache_metadata_format;
cache_mode_t cache_mode;
const char *policy_name;
struct dm_config_tree *policy_settings = NULL;
char *lockd_fast_args = NULL;
char *lockd_fast_name = NULL;
struct id lockd_fast_id;
int r = 0;
if (!validate_lv_cache_create_pool(lv_fast))
return_0;
if (!get_cache_params(cmd, &chunk_size, &cache_metadata_format, &cache_mode, &policy_name, &policy_settings))
goto_out;
/*
* lv/cache_lv keeps the same lockd lock it had before, the lock for
* lv_fast is kept but is not used while it's attached, and
* lv_corig has no lock. (When the cachevol is split a new lvmlockd
* lock does not need to be created for it again.)
*/
if (vg_is_shared(vg) && lv_fast->lock_args) {
lockd_fast_args = dm_pool_strdup(cmd->mem, lv_fast->lock_args);
lockd_fast_name = dm_pool_strdup(cmd->mem, lv_fast->name);
memcpy(&lockd_fast_id, &lv_fast->lvid.id[1], sizeof(struct id));
}
/*
* The lvm tradition is to rename an LV with a special role-specific
* suffix when it becomes hidden. Here the _cvol suffix is added to
* the fast LV name. When the cache is detached, it's renamed back.
*/
if (dm_snprintf(cvol_name, sizeof(cvol_name), "%s_cvol", lv_fast->name) < 0) {
log_error("Can't prepare new cachevol name for %s.", display_lvname(lv_fast));
goto out;
}
if (!lv_rename_update(cmd, lv_fast, cvol_name, 0))
goto_out;
lv_fast->status |= LV_CACHE_VOL; /* Mark as cachevol LV */
/*
* Changes the vg struct to match the desired state.
*
* - lv == cache_lv, which keeps existing lv name and id, gets new
* segment with segtype "cache".
*
* - lv_fast keeps its existing name and id, becomes hidden.
*
* - lv_corig gets new name (existing name + _corig suffix),
* gets new id, becomes hidden, gets segments from lv.
*/
if (!(cache_lv = lv_cache_create(lv_fast, lv)))
goto_out;
if (arg_is_set(cmd, poolmetadatasize_ARG))
poolmetadatasize = arg_uint64_value(cmd, poolmetadatasize_ARG, 0);
if (!cache_vol_set_params(cmd, cache_lv, lv_fast, poolmetadatasize, chunk_size, cache_metadata_format, cache_mode, policy_name, policy_settings))
goto_out;
if (cache_mode == CACHE_MODE_WRITEBACK) {
log_warn("WARNING: repairing a damaged cachevol is not yet possible.");
log_warn("WARNING: cache mode writethrough is suggested for safe operation.");
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt("Continue using writeback without repair?") == 'n')
goto_out;
}
/*
* vg_write(), suspend_lv(), vg_commit(), resume_lv(),
* where the old LV is suspended and the new LV is resumed.
*/
if (!lv_update_and_reload(cache_lv))
goto_out;
if (lockd_fast_name) {
/* lockd unlock for lv_fast */
if (!lockd_lv_name(cmd, vg, lockd_fast_name, &lockd_fast_id, lockd_fast_args, "un", LDLV_PERSISTENT))
log_error("Failed to unlock fast LV %s/%s", vg->name, lockd_fast_name);
}
r = 1;
out:
if (policy_settings)
dm_config_destroy(policy_settings);
return r;
}
static int _cache_pool_attach(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *cachepool_lv)
{
struct logical_volume *cache_lv;
uint32_t chunk_size = 0;
cache_metadata_format_t cache_metadata_format;
cache_mode_t cache_mode;
const char *policy_name;
struct dm_config_tree *policy_settings = NULL;
int r = 0;
if (!validate_lv_cache_create_pool(cachepool_lv))
return_0;
if (!get_cache_params(cmd, &chunk_size, &cache_metadata_format, &cache_mode, &policy_name, &policy_settings))
goto_bad;
if (!archive(lv->vg))
goto_bad;
if (!(cache_lv = lv_cache_create(cachepool_lv, lv)))
goto_bad;
if (!cache_set_params(first_seg(cache_lv), chunk_size, cache_metadata_format, cache_mode, policy_name, policy_settings))
goto_bad;
if (!lv_update_and_reload(cache_lv))
goto_bad;
r = 1;
bad:
if (policy_settings)
dm_config_destroy(policy_settings);
return r;
}
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;
}
/*
* Data/results accumulated during processing.
*/
struct lvconvert_result {
unsigned need_polling:1;
unsigned wait_cleaner_writecache:1;
unsigned active_begin:1;
unsigned remove_cache:1;
struct dm_list poll_idls;
};
/*
* repair-related lvconvert utilities
*/
static int _lvconvert_repair_pvs_mirror(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle,
struct dm_list *use_pvh)
{
struct lvconvert_result *lr = (struct lvconvert_result *) handle->custom_handle;
struct lvconvert_params lp = { 0 };
struct convert_poll_id_list *idl;
struct lvinfo info;
int ret;
/*
* We want to allow cmirror active on multiple nodes to be repaired,
* but normal mirror to only be repaired if active exclusively here.
* If the LV is active it already has the necessary lock, but if not
* active, then require ex since we cannot know the active state on
* other hosts.
*/
if (!lv_is_active(lv)) {
if (!lockd_lv(cmd, lv, "ex", 0))
return_0;
}
/*
* FIXME: temporary use of lp because _lvconvert_mirrors_repair()
* and _aux() still use lp fields everywhere.
* Migrate them away from using lp (for the most part just use
* local variables, and check arg_values directly).
*/
/*
* Fill in any lp fields here that this fn expects to be set before
* it's called. It's hard to tell what the old code expects in lp
* for repair; it doesn't take the stripes option, but it seems to
* expect lp.stripes to be set to 1.
*/
lp.alloc = (alloc_policy_t) arg_uint_value(cmd, alloc_ARG, ALLOC_INHERIT);
lp.stripes = 1;
ret = _lvconvert_mirrors_repair(cmd, lv, &lp, use_pvh);
if (lp.need_polling) {
if (!lv_info(cmd, lv, 0, &info, 0, 0) || !info.exists)
log_print_unless_silent("Conversion starts after activation.");
else {
if (!(idl = _convert_poll_id_list_create(cmd, lv)))
return 0;
dm_list_add(&lr->poll_idls, &idl->list);
}
lr->need_polling = 1;
}
return ret;
}
static void _lvconvert_repair_pvs_raid_ask(struct cmd_context *cmd, int *do_it)
{
const char *dev_policy;
*do_it = 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 */
*do_it = 0;
return;
}
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt("Attempt to replace failed RAID images "
"(requires full device resync)? [y/n]: ") == 'n') {
*do_it = 0;
}
}
static int _lvconvert_repair_pvs_raid(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle,
struct dm_list *use_pvh)
{
struct dm_list *failed_pvs;
int do_it;
if (!lv_is_active(lv_lock_holder(lv))) {
log_error("%s must be active to perform this operation.", display_lvname(lv));
return 0;
}
lv_check_transient(lv); /* TODO check this in lib for all commands? */
_lvconvert_repair_pvs_raid_ask(cmd, &do_it);
if (do_it) {
if (!(failed_pvs = _failed_pv_list(lv->vg)))
return_0;
if (!lv_raid_replace(lv, arg_count(cmd, force_ARG), failed_pvs, use_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;
}
static int _lvconvert_repair_pvs(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
struct dm_list *failed_pvs;
struct dm_list *use_pvh;
int ret;
if (cmd->position_argc > 1) {
/* First pos arg is required LV, remaining are optional PVs. */
if (!(use_pvh = create_pv_list(cmd->mem, lv->vg, cmd->position_argc - 1, cmd->position_argv + 1, 0)))
return_ECMD_FAILED;
} else
use_pvh = &lv->vg->pvs;
if (lv_is_raid(lv))
ret = _lvconvert_repair_pvs_raid(cmd, lv, handle, use_pvh);
else if (lv_is_mirror(lv))
ret = _lvconvert_repair_pvs_mirror(cmd, lv, handle, use_pvh);
else
ret = 0;
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 ? ECMD_PROCESSED : ECMD_FAILED;
}
static int _lvconvert_repair_cachepool_thinpool(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
int poolmetadataspare = arg_int_value(cmd, poolmetadataspare_ARG, DEFAULT_POOL_METADATA_SPARE);
struct dm_list *use_pvh;
/* ensure it's not active elsewhere. */
if (!lockd_lv(cmd, lv, "ex", 0))
return_0;
if (cmd->position_argc > 1) {
/* First pos arg is required LV, remaining are optional PVs. */
if (!(use_pvh = create_pv_list(cmd->mem, lv->vg, cmd->position_argc - 1, cmd->position_argv + 1, 0)))
return_ECMD_FAILED;
} else
use_pvh = &lv->vg->pvs;
if (lv_is_thin_pool(lv)) {
if (!_lvconvert_thin_pool_repair(cmd, lv, use_pvh, poolmetadataspare))
return_ECMD_FAILED;
} else /* cache */ {
if (!_lvconvert_cache_repair(cmd, lv, use_pvh, poolmetadataspare))
return_ECMD_FAILED;
}
return ECMD_PROCESSED;
}
static int _lvconvert_repair_single(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
if (lv_is_thin_pool(lv) ||
lv_is_cache(lv) ||
lv_is_cache_pool(lv))
return _lvconvert_repair_cachepool_thinpool(cmd, lv, handle);
if (lv_is_raid(lv) || lv_is_mirror(lv))
return _lvconvert_repair_pvs(cmd, lv, handle);
log_error("Unsupported volume type for repair of volume %s.",
display_lvname(lv));
return ECMD_FAILED;
}
/*
* FIXME: add option --repair-pvs to call _lvconvert_repair_pvs() directly,
* and option --repair-thinpool to call _lvconvert_repair_thinpool().
* and option --repair-cache to call _lvconvert_repair_cache().
* and option --repair-cachepool to call _lvconvert_repair_cachepool().
*/
int lvconvert_repair_cmd(struct cmd_context *cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_result lr = { 0 };
struct convert_poll_id_list *idl;
int saved_ignore_suspended_devices;
int ret, poll_ret;
dm_list_init(&lr.poll_idls);
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lr;
saved_ignore_suspended_devices = ignore_suspended_devices();
init_ignore_suspended_devices(1);
cmd->handles_missing_pvs = 1;
ret = process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
handle, NULL, &_lvconvert_repair_single);
init_ignore_suspended_devices(saved_ignore_suspended_devices);
if (lr.need_polling) {
dm_list_iterate_items(idl, &lr.poll_idls) {
poll_ret = _lvconvert_poll_by_id(cmd, idl->id,
arg_is_set(cmd, background_ARG), 0, 0);
if (poll_ret > ret)
ret = poll_ret;
}
}
destroy_processing_handle(cmd, handle);
return ret;
}
static int _lvconvert_replace_pv_single(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
struct arg_value_group_list *group;
const char *tmp_str;
struct dm_list *use_pvh;
struct dm_list *replace_pvh;
char **replace_pvs;
int replace_pv_count;
int i;
if (cmd->position_argc > 1) {
/* First pos arg is required LV, remaining are optional PVs. */
if (!(use_pvh = create_pv_list(cmd->mem, lv->vg, cmd->position_argc - 1, cmd->position_argv + 1, 0)))
return_ECMD_FAILED;
} else
use_pvh = &lv->vg->pvs;
if (!(replace_pv_count = arg_count(cmd, replace_ARG)))
return_ECMD_FAILED;
if (!(replace_pvs = dm_pool_alloc(cmd->mem, sizeof(char *) * replace_pv_count)))
return_ECMD_FAILED;
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 ECMD_FAILED;
}
if (!(replace_pvs[i++] = dm_pool_strdup(cmd->mem, tmp_str)))
return_ECMD_FAILED;
}
if (!(replace_pvh = create_pv_list(cmd->mem, lv->vg, replace_pv_count, replace_pvs, 0)))
return_ECMD_FAILED;
if (!lv_raid_replace(lv, arg_count(cmd, force_ARG), replace_pvh, use_pvh))
return_ECMD_FAILED;
return ECMD_PROCESSED;
}
int lvconvert_replace_pv_cmd(struct cmd_context *cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_result lr = { 0 };
int ret;
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lr;
ret = process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
handle, NULL, &_lvconvert_replace_pv_single);
destroy_processing_handle(cmd, handle);
return ret;
}
/*
* Merge a COW snapshot LV into its origin.
*/
static int _lvconvert_merge_snapshot_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct lvconvert_result *lr = (struct lvconvert_result *) handle->custom_handle;
struct logical_volume *lv_to_poll = NULL;
struct convert_poll_id_list *idl;
if (!_lvconvert_merge_old_snapshot(cmd, lv, &lv_to_poll))
return_ECMD_FAILED;
if (lv_to_poll) {
if (!(idl = _convert_poll_id_list_create(cmd, lv_to_poll)))
return_ECMD_FAILED;
dm_list_add(&lr->poll_idls, &idl->list);
lr->need_polling = 1;
}
return ECMD_PROCESSED;
}
int lvconvert_merge_snapshot_cmd(struct cmd_context *cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_result lr = { 0 };
struct convert_poll_id_list *idl;
int ret, poll_ret;
dm_list_init(&lr.poll_idls);
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lr;
ret = process_each_lv(cmd, cmd->position_argc, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
handle, NULL, &_lvconvert_merge_snapshot_single);
if (lr.need_polling) {
dm_list_iterate_items(idl, &lr.poll_idls) {
poll_ret = _lvconvert_poll_by_id(cmd, idl->id,
arg_is_set(cmd, background_ARG), 1, 0);
if (poll_ret > ret)
ret = poll_ret;
}
}
destroy_processing_handle(cmd, handle);
return ret;
}
/*
* Separate a COW snapshot from its origin.
*
* lvconvert --splitsnapshot LV_snapshot
* lvconvert_split_cow_snapshot
*/
static int _lvconvert_split_snapshot_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
if (!_lvconvert_splitsnapshot(cmd, lv))
return_ECMD_FAILED;
return ECMD_PROCESSED;
}
int lvconvert_split_snapshot_cmd(struct cmd_context *cmd, int argc, char **argv)
{
return process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_split_snapshot_single);
}
/*
* Combine two LVs that were once an origin/cow pair of LVs, were then
* separated with --splitsnapshot, and now with this command are combined again
* into the origin/cow pair.
*
* This is an obscure command that has little to no real uses.
*
* The command has unusual handling of position args. The first position arg
* will become the origin LV, and is not processed by process_each_lv. The
* second position arg will become the cow LV and is processed by
* process_each_lv.
*
* The single function can grab the origin LV from position_argv[0].
*
* begin with an ordinary LV foo:
* lvcreate -n foo -L 1 vg
*
* create a cow snapshot of foo named foosnap:
* lvcreate -s -L 1 -n foosnap vg/foo
*
* now, foo is an "origin LV" and foosnap is a "cow LV"
* (foosnap matches LV_snapshot aka lv_is_cow)
*
* split the two LVs apart:
* lvconvert --splitsnapshot vg/foosnap
*
* now, foo is *not* an origin LV and foosnap is *not* a cow LV
* (foosnap does not match LV_snapshot)
*
* now, combine the two LVs again:
* lvconvert --snapshot vg/foo vg/foosnap
*
* after this, foosnap will match LV_snapshot again.
*
* FIXME: when splitsnapshot is run, the previous cow LV should be
* flagged in the metadata somehow, and then that flag should be
* required here. As it is now, the first and second args
* (origin and cow) can be swapped and nothing catches it.
*/
static int _lvconvert_combine_split_snapshot_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
const char *origin_name = cmd->position_argv[0];
if (vg_is_shared(lv->vg)) {
log_error("Unable to combine split snapshots in VG with lock_type %s", lv->vg->lock_type);
return ECMD_FAILED;
}
/* If origin_name includes VG name, the VG name is removed. */
if (!validate_lvname_param(cmd, &lv->vg->name, &origin_name))
return_ECMD_FAILED;
if (!_lvconvert_snapshot(cmd, lv, origin_name))
return_ECMD_FAILED;
return ECMD_PROCESSED;
}
int lvconvert_combine_split_snapshot_cmd(struct cmd_context *cmd, int argc, char **argv)
{
const char *vgname = NULL;
const char *lvname1_orig;
const char *lvname2_orig;
const char *lvname1_split;
char *vglv;
int vglv_sz;
/*
* Hack to accomodate an old parsing quirk that allowed the
* the VG name to be attached to only the LV in arg pos 1,
* i.e. lvconvert -s vgname/lvname lvname
*
* The LV name in arg pos 2 is the one that is processed
* by process_each_lv(). If that LV has no VG name, but
* the first LV does, then copy the VG name from arg pos 1
* and add it to the LV name in arg pos 2 so that the
* standard arg parsing in process_each_lv will find it.
*
* This is the only instance in all commands.
*/
lvname1_orig = cmd->position_argv[0];
lvname2_orig = cmd->position_argv[1];
if (strchr(lvname1_orig, '/') && !strchr(lvname2_orig, '/') && !getenv("LVM_VG_NAME")) {
if (!(lvname1_split = dm_pool_strdup(cmd->mem, lvname1_orig)))
return_ECMD_FAILED;
if (!validate_lvname_param(cmd, &vgname, &lvname1_split))
return_ECMD_FAILED;
vglv_sz = strlen(vgname) + strlen(lvname2_orig) + 2;
if (!(vglv = dm_pool_alloc(cmd->mem, vglv_sz)) ||
dm_snprintf(vglv, vglv_sz, "%s/%s", vgname, lvname2_orig) < 0) {
log_error("vg/lv string alloc failed.");
return ECMD_FAILED;
}
/* vglv is now vgname/lvname2 and replaces lvname2_orig */
cmd->position_argv[1] = vglv;
}
return process_each_lv(cmd, 1, cmd->position_argv + 1, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_combine_split_snapshot_single);
}
static int _lvconvert_start_poll_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct lvconvert_result *lr = (struct lvconvert_result *) handle->custom_handle;
struct convert_poll_id_list *idl;
if (!(idl = _convert_poll_id_list_create(cmd, lv)))
return_ECMD_FAILED;
dm_list_add(&lr->poll_idls, &idl->list);
lr->need_polling = 1;
return ECMD_PROCESSED;
}
int lvconvert_start_poll_cmd(struct cmd_context *cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_result lr = { 0 };
struct convert_poll_id_list *idl;
int saved_ignore_suspended_devices;
int ret, poll_ret;
dm_list_init(&lr.poll_idls);
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lr;
saved_ignore_suspended_devices = ignore_suspended_devices();
init_ignore_suspended_devices(1);
cmd->handles_missing_pvs = 1;
ret = process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
handle, NULL, &_lvconvert_start_poll_single);
init_ignore_suspended_devices(saved_ignore_suspended_devices);
if (lr.need_polling) {
dm_list_iterate_items(idl, &lr.poll_idls) {
poll_ret = _lvconvert_poll_by_id(cmd, idl->id,
arg_is_set(cmd, background_ARG), 0, 0);
if (poll_ret > ret)
ret = poll_ret;
}
}
destroy_processing_handle(cmd, handle);
return ret;
}
static int _lvconvert_to_pool_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct dm_list *use_pvh = NULL;
int to_thinpool = 0;
int to_cachepool = 0;
switch (cmd->command->command_enum) {
case lvconvert_to_thinpool_CMD:
to_thinpool = 1;
break;
case lvconvert_to_cachepool_CMD:
to_cachepool = 1;
break;
default:
log_error(INTERNAL_ERROR "Invalid lvconvert pool command");
return 0;
};
if (cmd->position_argc > 1) {
/* First pos arg is required LV, remaining are optional PVs. */
if (!(use_pvh = create_pv_list(cmd->mem, lv->vg, cmd->position_argc - 1, cmd->position_argv + 1, 0)))
return_ECMD_FAILED;
} else
use_pvh = &lv->vg->pvs;
if (!_lvconvert_to_pool(cmd, lv, lv, to_thinpool, to_cachepool, use_pvh))
return_ECMD_FAILED;
return ECMD_PROCESSED;
}
/*
* The LV position arg is used as thinpool/cachepool data LV.
*/
int lvconvert_to_pool_cmd(struct cmd_context *cmd, int argc, char **argv)
{
return process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_to_pool_single);
}
#define MAX_CACHEDEVS 8
static int _lv_create_cachevol(struct cmd_context *cmd,
struct volume_group *vg,
struct logical_volume *lv,
struct logical_volume **cachevol_lv)
{
char cvname[NAME_LEN];
char format[NAME_LEN];
struct dm_list *use_pvh;
struct pv_list *pvl;
const char *device_name = "";
struct device *dev_fast;
char *dev_argv[MAX_CACHEDEVS];
int dev_argc = 0;
uint64_t cache_size_sectors = 0;
uint64_t full_size_sectors = 0;
uint64_t pv_size_sectors;
struct logical_volume *cachevol;
struct arg_value_group_list *group;
struct lvcreate_params lp = {
.activate = CHANGE_AN,
.alloc = ALLOC_INHERIT,
.major = -1,
.minor = -1,
.permission = LVM_READ | LVM_WRITE,
.pvh = &vg->pvs,
.read_ahead = DM_READ_AHEAD_NONE,
.stripes = 1,
.vg_name = vg->name,
.zero = 0,
.wipe_signatures = 0,
.suppress_zero_warn = 1,
};
/*
* If cache size is not set, and all cachedevice's are unused,
* then the cache size is the sum of all cachedevice sizes.
*/
cache_size_sectors = arg_uint64_value(cmd, cachesize_ARG, 0);
dm_list_iterate_items(group, &cmd->arg_value_groups) {
if (!grouped_arg_is_set(group->arg_values, cachedevice_ARG))
continue;
if (!(device_name = grouped_arg_str_value(group->arg_values, cachedevice_ARG, NULL)))
break;
if (device_name[0] == '@') {
if (!cache_size_sectors) {
log_error("With tag as cachedevice, --cachesize is required.");
return 0;
}
goto add_dev_arg;
}
if (!(dev_fast = dev_cache_get(cmd, device_name, cmd->filter))) {
log_error("Device %s not found.", device_name);
return 0;
}
if (!(pvl = find_pv_in_vg(vg, device_name))) {
log_error("PV %s not found in VG.", device_name);
return 0;
}
/*
* If the dev is used in the VG, then require a cachesize to allocate
* from it. If it is not used in the VG, then prompt asking if the
* entire dev should be used.
*/
if (!cache_size_sectors && pvl->pv->pe_alloc_count) {
log_error("PV %s is in use, --cachesize is required.", device_name);
return 0;
}
if (!cache_size_sectors) {
pv_size_sectors = (pvl->pv->pe_count * (uint64_t)vg->extent_size);
if (!arg_is_set(cmd, yes_ARG) &&
yes_no_prompt("Use all %s from %s for cache? [y/n]: ",
display_size(cmd, pv_size_sectors), device_name) == 'n') {
log_print("Use --cachesize SizeMB to use a part of the cachedevice.");
log_error("Conversion aborted.");
return 0;
}
full_size_sectors += pv_size_sectors;
}
add_dev_arg:
if (dev_argc >= MAX_CACHEDEVS) {
log_error("Cannot allocate from more than %u cache devices.", MAX_CACHEDEVS);
return 0;
}
dev_argv[dev_argc++] = (char*)device_name;
}
if (!cache_size_sectors)
cache_size_sectors = full_size_sectors;
if (!dev_argc) {
log_error("No cachedevice specified to create a cachevol.");
return 0;
}
if (!(use_pvh = create_pv_list(cmd->mem, vg, dev_argc, dev_argv, 1))) {
log_error("cachedevice not found in VG %s.", device_name);
return 0;
}
if (dm_snprintf(cvname, NAME_LEN, "%s_cache", lv->name) < 0) {
log_error("Failed to create cachevol LV name.");
return 0;
}
if (find_lv(vg, cvname)) {
memset(format, 0, sizeof(cvname));
memset(cvname, 0, sizeof(cvname));
if (dm_snprintf(format, sizeof(format), "%s_cache%%d", lv->name) < 0) {
log_error("Failed to generate cachevol LV format.");
return 0;
}
if (!generate_lv_name(vg, format, cvname, sizeof(cvname))) {
log_error("Failed to generate cachevol LV name.");
return 0;
}
}
lp.lv_name = cvname;
lp.pvh = use_pvh;
lp.extents = cache_size_sectors / vg->extent_size;
log_print("Creating cachevol LV %s with size %s.",
cvname, display_size(cmd, cache_size_sectors));
dm_list_init(&lp.tags);
if (!(lp.segtype = get_segtype_from_string(cmd, SEG_TYPE_NAME_STRIPED)))
return_0;
if (!(cachevol = lv_create_single(vg, &lp))) {
log_error("Failed to create cachevol LV");
return 0;
}
*cachevol_lv = cachevol;
return 1;
}
int lvconvert_cachevol_attach_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct volume_group *vg = lv->vg;
struct logical_volume *lv_fast;
const char *fast_name;
/*
* User specifies an existing cachevol to use or a cachedevice
* to create a cachevol from.
*/
if ((fast_name = arg_str_value(cmd, cachevol_ARG, NULL))) {
if (!validate_lvname_param(cmd, &vg->name, &fast_name))
goto_bad;
if (!(lv_fast = find_lv(vg, fast_name))) {
log_error("LV %s not found.", fast_name);
goto bad;
}
if (lv_is_cache_vol(lv_fast)) {
log_error("LV %s is already used as a cachevol.", display_lvname(lv_fast));
goto bad;
}
if (!dm_list_empty(&lv_fast->segs_using_this_lv)) {
log_error("LV %s is already in use.", display_lvname(lv_fast));
goto bad;
}
if (!arg_is_set(cmd, yes_ARG) &&
yes_no_prompt("Erase all existing data on %s? [y/n]: ", display_lvname(lv_fast)) == 'n') {
log_error("Conversion aborted.");
goto bad;
}
if (!lockd_lv(cmd, lv_fast, "ex", 0))
goto_bad;
} else {
if (!_lv_create_cachevol(cmd, vg, lv, &lv_fast))
goto_bad;
}
/* Ensure the LV is not active elsewhere. */
if (!lockd_lv(cmd, lv, "ex", 0))
goto_bad;
if (!wipe_cache_pool(lv_fast))
goto_bad;
/* When the lv arg is a thinpool, redirect command to data sub lv. */
if (lv_is_thin_pool(lv)) {
lv = seg_lv(first_seg(lv), 0);
log_verbose("Redirecting operation to data sub LV %s.", display_lvname(lv));
}
if (!_raid_split_image_conversion(lv))
goto_bad;
/* Attach the cache to the main LV. */
if (!_cache_vol_attach(cmd, lv, lv_fast))
goto_bad;
log_print_unless_silent("Logical volume %s is now cached.", display_lvname(lv));
return ECMD_PROCESSED;
bad:
return ECMD_FAILED;
}
static int _lvconvert_cachepool_attach_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct lv_segment *seg;
struct volume_group *vg = lv->vg;
struct logical_volume *cachepool_lv;
const char *cachepool_name;
if (!(cachepool_name = arg_str_value(cmd, cachepool_ARG, NULL)))
goto_out;
if (!validate_lvname_param(cmd, &vg->name, &cachepool_name))
goto_out;
if (!(cachepool_lv = find_lv(vg, cachepool_name))) {
log_error("Cache pool %s not found.", cachepool_name);
goto out;
}
/* Ensure the LV is not active elsewhere. */
if (!lockd_lv(cmd, lv, "ex", 0))
goto_out;
/*
* If cachepool_lv is not yet a cache pool, convert it to one.
* If using an existing cache pool, wipe it.
*/
if (!lv_is_cache_pool(cachepool_lv)) {
int lvt_enum = get_lvt_enum(cachepool_lv);
struct lv_type *lvtype = get_lv_type(lvt_enum);
if (lvt_enum != striped_LVT && lvt_enum != linear_LVT && lvt_enum != raid_LVT) {
log_error("LV %s with type %s cannot be converted to a cache pool.",
display_lvname(cachepool_lv), lvtype ? lvtype->name : "unknown");
goto out;
}
if (lv_is_cache_vol(cachepool_lv)) {
log_error("LV %s is already used as a cachevol.", display_lvname(cachepool_lv));
goto out;
}
if (cachepool_lv == lv) {
log_error("Use a different LV for cache pool LV and cache LV %s.",
display_lvname(cachepool_lv));
goto out;
}
if (!_lvconvert_to_pool(cmd, cachepool_lv, lv, 0, 1, &vg->pvs)) {
log_error("LV %s could not be converted to a cache pool.",
display_lvname(cachepool_lv));
goto out;
}
/* cachepool_lv is converted into cache-pool data LV */
if (!(seg = get_only_segment_using_this_lv(cachepool_lv))) {
log_error(INTERNAL_ERROR "LV %s is not a cache pool data volume.",
display_lvname(cachepool_lv));
goto out;
}
cachepool_lv = seg->lv;
} else {
if (!dm_list_empty(&cachepool_lv->segs_using_this_lv)) {
log_error("Cache pool %s is already in use.", cachepool_name);
goto out;
}
/* Note: requires rather deep know-how to skip zeroing */
if (!arg_is_set(cmd, zero_ARG)) {
if (!arg_is_set(cmd, yes_ARG) &&
yes_no_prompt("Do you want wipe existing metadata of cache pool %s? [y/n]: ",
display_lvname(cachepool_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!");
goto out;
}
/* Wiping confirmed, go ahead */
if (!wipe_cache_pool(cachepool_lv))
goto_out;
} else if (arg_int_value(cmd, zero_ARG, 0)) {
if (!wipe_cache_pool(cachepool_lv))
goto_out;
} else {
log_warn("WARNING: Reusing cache pool metadata %s for volume caching.",
display_lvname(cachepool_lv));
}
}
/* When the lv arg is a thinpool, redirect command to data sub lv. */
if (lv_is_thin_pool(lv)) {
lv = seg_lv(first_seg(lv), 0);
log_verbose("Redirecting operation to data sub LV %s.", display_lvname(lv));
} else if (lv_is_vdo_pool(lv)) {
lv = seg_lv(first_seg(lv), 0);
log_verbose("Redirecting operation to data sub LV %s.", display_lvname(lv));
}
if (!_raid_split_image_conversion(lv))
goto_out;
/* Attach the cache to the main LV. */
if (!_cache_pool_attach(cmd, lv, cachepool_lv))
goto_out;
log_print_unless_silent("Logical volume %s is now cached.", display_lvname(lv));
return ECMD_PROCESSED;
out:
return ECMD_FAILED;
}
int lvconvert_to_cache_with_cachepool_cmd(struct cmd_context *cmd, int argc, char **argv)
{
return process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_cachepool_attach_single);
}
static int _lvconvert_to_thin_with_external_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct volume_group *vg = lv->vg;
struct logical_volume *thinpool_lv;
const char *thinpool_name;
if (!(thinpool_name = arg_str_value(cmd, thinpool_ARG, NULL)))
goto_out;
if (!validate_lvname_param(cmd, &vg->name, &thinpool_name))
goto_out;
if (!(thinpool_lv = find_lv(vg, thinpool_name))) {
log_error("Thin pool %s not found.", thinpool_name);
goto out;
}
/* If thinpool_lv is not yet a thin pool, convert it to one. */
if (!lv_is_thin_pool(thinpool_lv)) {
int lvt_enum = get_lvt_enum(thinpool_lv);
struct lv_type *lvtype = get_lv_type(lvt_enum);
if (lvt_enum != striped_LVT && lvt_enum != linear_LVT && lvt_enum != raid_LVT) {
log_error("LV %s with type %s cannot be converted to a thin pool.",
display_lvname(thinpool_lv), lvtype ? lvtype->name : "unknown");
goto out;
}
if (thinpool_lv == lv) {
log_error("Use a different LV for thin pool LV and thin LV %s.",
display_lvname(thinpool_lv));
goto out;
}
if (!_lvconvert_to_pool(cmd, thinpool_lv, lv, 1, 0, &vg->pvs)) {
log_error("LV %s could not be converted to a thin pool.",
display_lvname(thinpool_lv));
goto out;
}
if (!(thinpool_lv = find_lv(vg, thinpool_name))) {
log_error(INTERNAL_ERROR "LV %s cannot be found.", thinpool_name);
goto out;
}
if (!lv_is_thin_pool(thinpool_lv)) {
log_error(INTERNAL_ERROR "LV %s is not a thin pool.", display_lvname(thinpool_lv));
goto out;
}
}
/* If lv is a cache volume, all data must be flushed. */
if (lv_is_cache(lv)) {
const struct lv_segment *pool_seg = first_seg(first_seg(lv)->pool_lv);
int is_clean;
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));
goto out;
}
if (!lv_cache_wait_for_clean(lv, &is_clean))
goto_out;
if (!is_clean) {
log_error("Cache %s is not clean, refusing to convert to external origin.",
display_lvname(lv));
goto out;
}
}
/* Convert lv to thin with external origin using thinpool_lv. */
if (!_lvconvert_to_thin_with_external(cmd, lv, thinpool_lv))
goto_out;
return ECMD_PROCESSED;
out:
return ECMD_FAILED;
}
int lvconvert_to_thin_with_external_cmd(struct cmd_context *cmd, int argc, char **argv)
{
return process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_to_thin_with_external_single);
}
static int _lvconvert_swap_pool_metadata_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct volume_group *vg = lv->vg;
struct logical_volume *metadata_lv;
const char *metadata_name;
if (vg_is_shared(lv->vg)) {
/* FIXME: need to swap locks betwen LVs? */
log_error("Unable to swap pool metadata in VG with lock_type %s", lv->vg->lock_type);
goto out;
}
if (!(metadata_name = arg_str_value(cmd, poolmetadata_ARG, NULL)))
goto_out;
if (!validate_lvname_param(cmd, &vg->name, &metadata_name))
goto_out;
if (!(metadata_lv = find_lv(vg, metadata_name))) {
log_error("Metadata LV %s not found.", metadata_name);
goto out;
}
if (metadata_lv == lv) {
log_error("Can't use same LV for pool data and metadata LV %s.",
display_lvname(metadata_lv));
goto out;
}
if (!_lvconvert_swap_pool_metadata(cmd, lv, metadata_lv))
goto_out;
return ECMD_PROCESSED;
out:
return ECMD_FAILED;
}
int lvconvert_swap_pool_metadata_cmd(struct cmd_context *cmd, int argc, char **argv)
{
return process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_swap_pool_metadata_single);
}
static int _lvconvert_to_pool_or_swap_metadata_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct dm_list *use_pvh = NULL;
int to_thinpool = 0;
int to_cachepool = 0;
int lvt_enum = get_lvt_enum(lv);
struct lv_type *lvtype;
switch (cmd->command->command_enum) {
case lvconvert_to_thinpool_or_swap_metadata_CMD:
if (lv_is_cache(lv) || lv_is_writecache(lv))
/* For cached LV check the cache origin LV type */
lvt_enum = get_lvt_enum(seg_lv(first_seg(lv), 0));
to_thinpool = 1;
break;
case lvconvert_to_cachepool_or_swap_metadata_CMD:
if (lv_is_cache(lv))
goto_bad; /* Cache over cache is not supported */
to_cachepool = 1;
break;
default:
log_error(INTERNAL_ERROR "Invalid lvconvert pool command.");
return ECMD_FAILED;
}
switch (lvt_enum) {
case thinpool_LVT:
if (!to_thinpool)
goto_bad; /* can't accept cache-pool */
break; /* swap thin-pool */
case cachepool_LVT:
if (!to_cachepool)
goto_bad; /* can't accept thin-pool */
break; /* swap cache-pool */
case linear_LVT:
case raid_LVT:
case striped_LVT:
case zero_LVT:
break;
default:
bad:
lvtype = get_lv_type(lvt_enum);
log_error("LV %s with type %s cannot be used as a %s pool LV.",
display_lvname(lv), lvtype ? lvtype->name : "unknown",
to_thinpool ? "thin" : "cache");
return ECMD_FAILED;
}
if (lv_is_origin(lv)) {
log_error("Cannot convert logical volume %s under snapshot.",
display_lvname(lv));
return ECMD_FAILED;
}
if (!lv_is_visible(lv)) {
log_error("Can't convert internal LV %s.",
display_lvname(lv));
return ECMD_FAILED;
}
if (lv_is_locked(lv)) {
log_error("Can't convert locked LV %s.",
display_lvname(lv));
return ECMD_FAILED;
}
if (cmd->position_argc > 1) {
/* First pos arg is required LV, remaining are optional PVs. */
if (!(use_pvh = create_pv_list(cmd->mem, lv->vg, cmd->position_argc - 1, cmd->position_argv + 1, 0)))
return_ECMD_FAILED;
} else
use_pvh = &lv->vg->pvs;
/*
* We can finally determine if this command is supposed to create
* a pool or swap the metadata in an existing pool.
*
* This allows the ambiguous command:
* 'lvconvert --thinpool LV1 --poolmetadata LV2' to mean either:
* 1. convert LV2 to a pool using the specified meta LV2
* 2. swap the meta lv in LV1 with LV2
*
* In case 2, the poolmetadata option is required, but in case 1
* it is optional. So, the command def is not able to validate
* the required/optional option, and we have to check here
* for missing poolmetadata in case 2.
*/
if (lv_is_pool(lv)) {
if (!arg_is_set(cmd, poolmetadata_ARG)) {
log_error("The --poolmetadata option is required to swap metadata.");
return ECMD_FAILED;
}
return _lvconvert_swap_pool_metadata_single(cmd, lv, handle);
}
if (!_lvconvert_to_pool(cmd, lv, lv, to_thinpool, to_cachepool, use_pvh))
return_ECMD_FAILED;
return ECMD_PROCESSED;
}
/*
* In the command variants with no position LV arg, the LV arg is taken from
* the --thinpool/--cachepool arg, and the position args are modified to match
* the standard command form.
*/
int lvconvert_to_pool_or_swap_metadata_cmd(struct cmd_context *cmd, int argc, char **argv)
{
char *pool_data_name;
int i, p;
switch (cmd->command->command_enum) {
case lvconvert_to_thinpool_or_swap_metadata_CMD:
pool_data_name = (char *)arg_str_value(cmd, thinpool_ARG, NULL);
break;
case lvconvert_to_cachepool_or_swap_metadata_CMD:
pool_data_name = (char *)arg_str_value(cmd, cachepool_ARG, NULL);
break;
default:
log_error(INTERNAL_ERROR "Unknown pool conversion.");
return 0;
};
/* Make the LV the first position arg. */
p = cmd->position_argc;
for (i = 0; i < cmd->position_argc; i++)
cmd->position_argv[p] = cmd->position_argv[p-1];
cmd->position_argv[0] = pool_data_name;
cmd->position_argc++;
return process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_to_pool_or_swap_metadata_single);
}
static int _lvconvert_merge_thin_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
if (!_lvconvert_merge_thin_snapshot(cmd, lv))
return ECMD_FAILED;
return ECMD_PROCESSED;
}
int lvconvert_merge_thin_cmd(struct cmd_context *cmd, int argc, char **argv)
{
return process_each_lv(cmd, cmd->position_argc, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_merge_thin_single);
}
static int _lvconvert_detach_writecache(struct cmd_context *cmd, struct processing_handle *handle,
struct logical_volume *lv,
struct logical_volume *lv_fast);
static int _lvconvert_detach_writecache_when_clean(struct cmd_context *cmd,
struct lvconvert_result *lr);
static int _lvconvert_split_cache_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct logical_volume *lv_main = NULL;
struct logical_volume *lv_fast = NULL;
struct lv_segment *seg;
int ret = 0;
if (lv_is_writecache(lv)) {
lv_main = lv;
lv_fast = first_seg(lv_main)->writecache;
} else if (lv_is_cache(lv)) {
lv_main = lv;
lv_fast = first_seg(lv_main)->pool_lv;
} else if (lv_is_cache_pool(lv)) {
lv_fast = lv;
if ((dm_list_size(&lv_fast->segs_using_this_lv) == 1) &&
(seg = get_only_segment_using_this_lv(lv_fast)) &&
seg_is_cache(seg))
lv_main = seg->lv;
} else if (lv_is_thin_pool(lv)) {
lv_main = seg_lv(first_seg(lv), 0); /* cached _tdata */
lv_fast = first_seg(lv_main)->pool_lv;
} else if (lv_is_vdo_pool(lv)) {
lv_main = seg_lv(first_seg(lv), 0); /* cached _vdata */
lv_fast = first_seg(lv_main)->pool_lv;
}
if (!lv_main) {
log_error("Cannot find LV with cache from %s.", display_lvname(lv));
return ECMD_FAILED;
}
if (!lv_fast) {
log_error("Cannot find cache %s.", display_lvname(lv));
return ECMD_FAILED;
}
/* If LV is inactive here, ensure it's not active elsewhere. */
if (!lockd_lv(cmd, lv_main, "ex", 0))
return ECMD_FAILED;
if (lv_is_writecache(lv_main)) {
if (!_lvconvert_detach_writecache(cmd, handle, lv_main, lv_fast))
return ECMD_FAILED;
if (cmd->command->command_enum == lvconvert_split_and_remove_cache_CMD) {
struct lvconvert_result *lr = (struct lvconvert_result *) handle->custom_handle;
/*
* If detach is ongoing, then the remove needs to wait
* until _lvconvert_detach_writecache_when_clean(),
* after the detach has finished. When lr->remove_cache
* has been set, when_clean() knows it should remove
* lv_fast at the end.
*/
if (!lr->wait_cleaner_writecache) {
if (lvremove_single(cmd, lv_fast, NULL) != ECMD_PROCESSED)
return ECMD_FAILED;
}
}
ret = 1;
} else if (lv_is_cache(lv_main) && lv_is_cache_vol(lv_fast)) {
if (cmd->command->command_enum == lvconvert_split_and_remove_cache_CMD) {
ret = _lvconvert_split_and_remove_cachevol(cmd, lv_main, lv_fast);
log_print_unless_silent("Logical volume %s is not cached and %s is removed.",
display_lvname(lv), display_lvname(lv_fast));
} else if (cmd->command->command_enum == lvconvert_split_and_keep_cache_CMD) {
ret = _lvconvert_split_and_keep_cachevol(cmd, lv_main, lv_fast);
log_print_unless_silent("Logical volume %s is not cached and %s is unused.",
display_lvname(lv), display_lvname(lv_fast));
} else
log_error(INTERNAL_ERROR "Unknown cache split command.");
} else if (lv_is_cache(lv_main) && lv_is_cache_pool(lv_fast)) {
if (cmd->command->command_enum == lvconvert_split_and_remove_cache_CMD)
ret = _lvconvert_split_and_remove_cachepool(cmd, lv_main, lv_fast);
else if (cmd->command->command_enum == lvconvert_split_and_keep_cache_CMD)
ret = _lvconvert_split_and_keep_cachepool(cmd, lv_main, lv_fast);
else
log_error(INTERNAL_ERROR "Unknown cache split command.");
} else
log_error(INTERNAL_ERROR "Unknown cache split command.");
if (!ret)
return ECMD_FAILED;
return ECMD_PROCESSED;
}
int lvconvert_split_cache_cmd(struct cmd_context *cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_result lr = { 0 };
int ret;
cmd->handles_missing_pvs = 1;
cmd->partial_activation = 1;
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lr;
ret = process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
handle, NULL, &_lvconvert_split_cache_single);
destroy_processing_handle(cmd, handle);
if (ret == ECMD_FAILED)
return ret;
if (lr.wait_cleaner_writecache)
if (!_lvconvert_detach_writecache_when_clean(cmd, &lr))
ret = ECMD_FAILED;
return ret;
}
static int _lvconvert_raid_types_single(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
struct lvconvert_params *lp = (struct lvconvert_params *) handle->custom_handle;
struct dm_list *use_pvh;
struct convert_poll_id_list *idl;
struct lvinfo info;
int ret;
if (cmd->position_argc > 1) {
/* First pos arg is required LV, remaining are optional PVs. */
if (!(use_pvh = create_pv_list(cmd->mem, lv->vg, cmd->position_argc - 1, cmd->position_argv + 1, 0)))
return_ECMD_FAILED;
lp->pv_count = cmd->position_argc - 1;
} else
use_pvh = &lv->vg->pvs;
lp->pvh = use_pvh;
lp->lv_to_poll = lv;
ret = _lvconvert_raid_types(cmd, lv, lp);
if (ret != ECMD_PROCESSED)
return_ECMD_FAILED;
if (lp->need_polling) {
/* _lvconvert() call may alter the reference in lp->lv_to_poll */
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 ECMD_PROCESSED;
}
static int _lvconvert_raid_types_check(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle,
int lv_is_named_arg)
{
int lvt_enum = get_lvt_enum(lv);
struct lv_type *lvtype = get_lv_type(lvt_enum);
if (!lv_is_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_vdo_pool_data(lv) &&
!lv_is_used_cache_pool(lv) &&
!lv_is_mirrored(lv) &&
!lv_is_raid(lv))
goto fail_hidden;
}
/*
* FIXME: this validation could be done by command defs.
*
* Outside the standard linear/striped/mirror/raid LV
* types, cache is the only special LV type that is handled
* (the command is redirected to origin).
*/
switch (lvt_enum) {
case thin_LVT:
case thinpool_LVT:
case cachepool_LVT:
case snapshot_LVT:
log_error("Operation not permitted on LV %s type %s.",
display_lvname(lv), lvtype ? lvtype->name : "unknown");
return 0;
}
return 1;
fail_hidden:
log_error("Operation not permitted on hidden LV %s.", display_lvname(lv));
return 0;
}
int lvconvert_raid_types_cmd(struct cmd_context * cmd, int argc, char **argv)
{
int poll_ret, ret;
int saved_ignore_suspended_devices;
struct processing_handle *handle;
struct convert_poll_id_list *idl;
struct lvconvert_params lp = {
.conv_type = CONV_OTHER,
.target_attr = ~0,
.idls = DM_LIST_HEAD_INIT(lp.idls),
};
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lp;
if (!_read_params(cmd, &lp)) {
ret = EINVALID_CMD_LINE;
goto_out;
}
saved_ignore_suspended_devices = ignore_suspended_devices();
ret = process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
handle, &_lvconvert_raid_types_check, &_lvconvert_raid_types_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:
destroy_processing_handle(cmd, handle);
return ret;
}
/*
* change mirror log
*/
static int _lvconvert_visible_check(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle,
int lv_is_named_arg)
{
if (!lv_is_visible(lv)) {
log_error("Operation not permitted on hidden LV %s.", display_lvname(lv));
return 0;
}
return 1;
}
static int _lvconvert_change_mirrorlog_single(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
struct lvconvert_params *lp = (struct lvconvert_params *) handle->custom_handle;
struct dm_list *use_pvh;
if (cmd->position_argc > 1) {
/* First pos arg is required LV, remaining are optional PVs. */
if (!(use_pvh = create_pv_list(cmd->mem, lv->vg, cmd->position_argc - 1, cmd->position_argv + 1, 0)))
return_ECMD_FAILED;
lp->pv_count = cmd->position_argc - 1;
} else
use_pvh = &lv->vg->pvs;
lp->pvh = use_pvh;
/* FIXME: extract the mirrorlog functionality out of _lvconvert_raid_types()? */
return _lvconvert_raid_types(cmd, lv, lp);
}
int lvconvert_change_mirrorlog_cmd(struct cmd_context * cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_params lp = {
.conv_type = CONV_OTHER,
.target_attr = ~0,
.idls = DM_LIST_HEAD_INIT(lp.idls),
};
int ret;
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lp;
/* FIXME: extract the relevant bits of read_params and put here. */
if (!_read_params(cmd, &lp)) {
ret = EINVALID_CMD_LINE;
goto_out;
}
ret = process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
handle, &_lvconvert_visible_check, &_lvconvert_change_mirrorlog_single);
out:
destroy_processing_handle(cmd, handle);
return ret;
}
static int _lvconvert_change_region_size_single(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
if (!lv_raid_change_region_size(lv, arg_is_set(cmd, yes_ARG), arg_count(cmd, force_ARG),
arg_int_value(cmd, regionsize_ARG, 0)))
return ECMD_FAILED;
return ECMD_PROCESSED;
}
int lvconvert_change_region_size_cmd(struct cmd_context * cmd, int argc, char **argv)
{
return process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, &_lvconvert_visible_check, &_lvconvert_change_region_size_single);
}
/*
* split mirror images
*/
static int _lvconvert_split_mirror_images_single(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle)
{
struct lvconvert_params *lp = (struct lvconvert_params *) handle->custom_handle;
struct dm_list *use_pvh;
if (cmd->position_argc > 1) {
/* First pos arg is required LV, remaining are optional PVs. */
if (!(use_pvh = create_pv_list(cmd->mem, lv->vg, cmd->position_argc - 1, cmd->position_argv + 1, 0)))
return_ECMD_FAILED;
lp->pv_count = cmd->position_argc - 1;
} else
use_pvh = &lv->vg->pvs;
lp->pvh = use_pvh;
/* FIXME: extract the split functionality out of _lvconvert_raid_types()? */
return _lvconvert_raid_types(cmd, lv, lp);
}
int lvconvert_split_mirror_images_cmd(struct cmd_context * cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_params lp = {
.conv_type = CONV_OTHER,
.target_attr = ~0,
.idls = DM_LIST_HEAD_INIT(lp.idls),
};
int ret;
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lp;
/* FIXME: extract the relevant bits of read_params and put here. */
if (!_read_params(cmd, &lp)) {
ret = EINVALID_CMD_LINE;
goto_out;
}
/* FIXME: are there any hidden LVs that should be disallowed? */
ret = process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
handle, NULL, &_lvconvert_split_mirror_images_single);
out:
destroy_processing_handle(cmd, handle);
return ret;
}
/*
* merge mirror images
*
* Called from both lvconvert --mergemirrors and lvconvert --merge.
*/
static int _lvconvert_merge_mirror_images_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
if (!lv_raid_merge(lv))
return ECMD_FAILED;
return ECMD_PROCESSED;
}
int lvconvert_merge_mirror_images_cmd(struct cmd_context *cmd, int argc, char **argv)
{
/* arg can be a VG name, which is the standard option usage */
cmd->cname->flags &= ~GET_VGNAME_FROM_OPTIONS;
return process_each_lv(cmd, cmd->position_argc, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, &_lvconvert_visible_check, &_lvconvert_merge_mirror_images_single);
}
static int _lvconvert_merge_generic_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
int ret;
if (lv_is_cow(lv))
ret = _lvconvert_merge_snapshot_single(cmd, lv, handle);
else if (lv_is_thin_volume(lv))
ret = _lvconvert_merge_thin_single(cmd, lv, handle);
else
ret = _lvconvert_merge_mirror_images_single(cmd, lv, handle);
return ret;
}
int lvconvert_merge_cmd(struct cmd_context *cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_result lr = { 0 };
struct convert_poll_id_list *idl;
int ret, poll_ret;
dm_list_init(&lr.poll_idls);
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lr;
cmd->cname->flags &= ~GET_VGNAME_FROM_OPTIONS;
ret = process_each_lv(cmd, cmd->position_argc, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
handle, NULL, &_lvconvert_merge_generic_single);
/* polling is only used by merge_snapshot */
if (lr.need_polling) {
dm_list_iterate_items(idl, &lr.poll_idls) {
poll_ret = _lvconvert_poll_by_id(cmd, idl->id,
arg_is_set(cmd, background_ARG), 1, 0);
if (poll_ret > ret)
ret = poll_ret;
}
}
destroy_processing_handle(cmd, handle);
return ret;
}
static int _lvconvert_to_vdopool_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
const char *vg_name = NULL;
unsigned int vdo_pool_zero;
uint64_t vdo_pool_header_size;
struct volume_group *vg = lv->vg;
struct logical_volume *vdo_lv;
struct dm_vdo_target_params vdo_params; /* vdo */
struct lvcreate_params lvc = {
.activate = CHANGE_AEY,
.alloc = ALLOC_INHERIT,
.major = -1,
.minor = -1,
.suppress_zero_warn = 1, /* Suppress warning for this VDO */
.permission = LVM_READ | LVM_WRITE,
.pool_name = lv->name,
.pvh = &vg->pvs,
.read_ahead = arg_uint_value(cmd, readahead_ARG, DM_READ_AHEAD_AUTO),
.stripes = 1,
.lv_name = arg_str_value(cmd, name_ARG, NULL),
};
if (lvc.lv_name &&
!validate_restricted_lvname_param(cmd, &vg_name, &lvc.lv_name))
return_0;
lvc.virtual_extents = extents_from_size(cmd,
arg_uint64_value(cmd, virtualsize_ARG, UINT64_C(0)),
vg->extent_size);
if (!(lvc.segtype = get_segtype_from_string(cmd, SEG_TYPE_NAME_VDO)))
return_0;
if (activation() && lvc.segtype->ops->target_present) {
if (!lvc.segtype->ops->target_present(cmd, NULL, &lvc.target_attr)) {
log_error("%s: Required device-mapper target(s) not detected in your kernel.",
lvc.segtype->name);
return 0;
}
}
if (vg_is_shared(vg)) {
/* FIXME: need to swap locks betwen LVs? */
log_error("Unable to convert VDO pool in VG with lock_type %s", vg->lock_type);
goto out;
}
if (!fill_vdo_target_params(cmd, &vdo_params, &vdo_pool_header_size, vg->profile))
goto_out;
if (arg_is_set(cmd, compression_ARG))
vdo_params.use_compression =
arg_int_value(cmd, compression_ARG, 0);
if (arg_is_set(cmd, deduplication_ARG))
vdo_params.use_deduplication =
arg_int_value(cmd, deduplication_ARG, 0);
if (!activate_lv(cmd, lv)) {
log_error("Cannot activate %s.", display_lvname(lv));
goto out;
}
vdo_pool_zero = arg_int_value(cmd, zero_ARG, 1);
log_warn("WARNING: Converting logical volume %s to VDO pool volume %s formating.",
display_lvname(lv), vdo_pool_zero ? "with" : "WITHOUT");
if (vdo_pool_zero)
log_warn("THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)");
else
log_warn("WARNING: Using invalid VDO pool data MAY DESTROY YOUR DATA!");
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt("Do you really want to convert %s? [y/n]: ",
display_lvname(lv)) == 'n') {
log_error("Conversion aborted.");
goto out;
}
if (vdo_pool_zero) {
if (!wipe_lv(lv, (struct wipe_params) { .do_zero = 1, .do_wipe_signatures = 1,
.yes = arg_count(cmd, yes_ARG),
.force = arg_count(cmd, force_ARG)})) {
log_error("Aborting. Failed to wipe VDO data store.");
goto out;
}
}
if (!convert_vdo_pool_lv(lv, &vdo_params, &lvc.virtual_extents,
vdo_pool_zero, vdo_pool_header_size))
goto_out;
dm_list_init(&lvc.tags);
if (!(vdo_lv = lv_create_single(vg, &lvc)))
goto_out; /* FIXME: hmmm what to do now */
log_print_unless_silent("Converted %s to VDO pool volume and created virtual %s VDO volume.",
display_lvname(lv), display_lvname(vdo_lv));
return ECMD_PROCESSED;
out:
return ECMD_FAILED;
}
int lvconvert_to_vdopool_cmd(struct cmd_context *cmd, int argc, char **argv)
{
return process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_to_vdopool_single);
}
int lvconvert_to_vdopool_param_cmd(struct cmd_context *cmd, int argc, char **argv)
{
/* Make the LV the first position arg. */
int i, p = cmd->position_argc;
for (i = 0; i < cmd->position_argc; i++)
cmd->position_argv[p] = cmd->position_argv[p-1];
cmd->position_argv[0] = (char *)arg_str_value(cmd, vdopool_ARG, NULL);
cmd->position_argc++;
return process_each_lv(cmd, 1, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE,
NULL, NULL, &_lvconvert_to_vdopool_single);
}
/*
* Starts the detach process, and may complete it, or may defer the completion
* if cleaning is required, by returning a poll id. If deferred, the caller
* will notice the poll id and call lvconvert_detach_writecache_when_clean
* to wait for the cleaning and complete the detach. The command can be cancelled
* while waiting for cleaning and the same command be repeated to continue the
* process.
*/
static int _lvconvert_detach_writecache(struct cmd_context *cmd,
struct processing_handle *handle,
struct logical_volume *lv,
struct logical_volume *lv_fast)
{
struct lvconvert_result *lr = (struct lvconvert_result *) handle->custom_handle;
struct writecache_settings settings;
struct convert_poll_id_list *idl;
uint32_t block_size_sectors;
int active_begin = 0;
int active_clean = 0;
int is_clean = 0;
int noflush = 0;
dm_list_init(&lr->poll_idls);
memset(&settings, 0, sizeof(settings));
if (!get_writecache_settings(cmd, &settings, &block_size_sectors)) {
log_error("Invalid writecache settings.");
return 0;
}
if (!archive(lv->vg))
return_0;
/*
* If the LV is inactive when we begin, then we want to
* deactivate the LV at the end.
*/
active_begin = lv_is_active(lv);
if (lv_is_partial(lv_fast) || (!active_begin && arg_count(cmd, force_ARG))) {
if (!arg_count(cmd, force_ARG)) {
log_warn("WARNING: writecache on %s is not complete and cannot be flushed.", display_lvname(lv_fast));
log_warn("WARNING: cannot detach writecache from %s without --force.", display_lvname(lv));
log_error("Conversion aborted.");
return 0;
}
log_warn("WARNING: Data may be lost by detaching writecache without flushing.");
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt("Detach writecache %s from %s without flushing data?",
display_lvname(lv_fast), display_lvname(lv)) == 'n') {
log_error("Conversion aborted.");
return 0;
}
noflush = 1;
}
if (!noflush) {
/*
* --cachesettings cleaner=0 means to skip the use of the cleaner
* and go directly to detach which will use a flush message.
* (This is currently the only cachesetting used during detach.)
*/
if (settings.cleaner_set && !settings.cleaner) {
log_print_unless_silent("Detaching writecache skipping cleaner...");
goto detach;
}
if (!writecache_cleaner_supported(cmd)) {
log_print_unless_silent("Detaching writecache without cleaner...");
goto detach;
}
if (!active_begin && !activate_lv(cmd, lv)) {
log_error("Failed to activate LV to clean writecache.");
return 0;
}
active_clean = 1;
/*
* If the user ran this command previously (or set cleaner
* directly) the cache may already be empty and ready for
* detach.
*/
if (lv_writecache_is_clean(cmd, lv, NULL)) {
log_print_unless_silent("Detaching writecache already clean.");
is_clean = 1;
goto detach;
}
/*
* If the user has not already done lvchange --cachesettings cleaner=1
* then do that here. If the LV is inactive, this activates it
* so that cache writeback can be done.
*/
log_print_unless_silent("Detaching writecache setting cleaner.");
if (!lv_writecache_set_cleaner(lv)) {
log_error("Failed to set cleaner cachesetting to flush cache.");
log_error("See lvchange --cachesettings cleaner=1");
if (!active_begin && active_clean && !deactivate_lv(cmd, lv))
stack;
return 0;
}
/*
* The cache may have been nearly clean and will be empty with
* a short dely.
*/
usleep(10000);
if (lv_writecache_is_clean(cmd, lv, NULL)) {
log_print_unless_silent("Detaching writecache finished cleaning.");
is_clean = 1;
goto detach;
}
if (!(idl = _convert_poll_id_list_create(cmd, lv))) {
log_error("Failed to monitor writecache cleaner progress.");
return 0;
}
/*
* Monitor the writecache status until the cache is unused.
* This is done at the end of the command where locks are not
* held since the writeback can take some time.
*/
lr->wait_cleaner_writecache = 1;
lr->active_begin = active_begin;
/* The command wants to remove the cache after detaching. */
if (cmd->command->command_enum == lvconvert_split_and_remove_cache_CMD)
lr->remove_cache = 1;
dm_list_add(&lr->poll_idls, &idl->list);
return 1;
}
detach:
/*
* If the LV was inactive before cleaning and activated to do cleaning,
* then deactivate before the detach.
*/
if (!active_begin && active_clean && !deactivate_lv(cmd, lv))
stack;
if (is_clean)
noflush = 1;
if (!lv_detach_writecache_cachevol(lv, noflush))
return_0;
log_print_unless_silent("Logical volume %s writecache has been detached.",
display_lvname(lv));
return 1;
}
/*
* _lvconvert_detach_writecache() set the cleaner option for the LV
* so writecache will begin writing back data from cache to origin.
* It then saved the LV name/id (lvconvert_result/poll_id), and
* exited process_each_lv (releasing the VG and VG lock). Then
* this is called to monitor the progress of the cache writeback.
* When the cache is clean, this does the detach (writecache is removed
* in metadata and LV in kernel is updated.)
*/
static int _lvconvert_detach_writecache_when_clean(struct cmd_context *cmd,
struct lvconvert_result *lr)
{
struct convert_poll_id_list *idl;
struct poll_operation_id *id;
struct volume_group *vg;
struct logical_volume *lv;
struct logical_volume *lv_fast;
uint32_t lockd_state, error_flags;
uint64_t dirty;
int ret = 0;
idl = dm_list_item(dm_list_first(&lr->poll_idls), struct convert_poll_id_list);
id = idl->id;
/*
* TODO: we should be able to save info about the dm device for this LV
* and monitor the dm device status without doing vg lock/read around
* each check. The vg lock/read/write would then happen only once when
* status was finished and we want to finish the detach. If the dm
* device goes away while monitoring, it's no different and no worse
* than the LV going away here.
*/
retry:
lockd_state = 0;
error_flags = 0;
if (!lockd_vg(cmd, id->vg_name, "ex", 0, &lockd_state)) {
log_error("Detaching writecache interrupted - locking VG failed.");
return 0;
}
log_debug("detach writecache check clean reading vg %s", id->vg_name);
vg = vg_read(cmd, id->vg_name, NULL, READ_FOR_UPDATE, lockd_state, &error_flags, NULL);
if (!vg) {
log_error("Detaching writecache interrupted - reading VG failed.");
goto out_lockd;
}
if (error_flags) {
log_error("Detaching writecache interrupted - reading VG error %x.", error_flags);
goto out_release;
}
lv = find_lv(vg, id->lv_name);
if (lv && id->uuid && strcmp(id->uuid, (char *)&lv->lvid))
lv = NULL;
if (!lv) {
log_error("Detaching writecache interrupted - LV not found.");
goto out_release;
}
if (!lv_is_active(lv)) {
log_error("Detaching writecache interrupted - LV not active.");
goto out_release;
}
if (!lv_writecache_is_clean(cmd, lv, &dirty)) {
unlock_and_release_vg(cmd, vg, vg->name);
if (!lockd_vg(cmd, id->vg_name, "un", 0, &lockd_state))
stack;
log_print_unless_silent("Detaching writecache cleaning %llu blocks", (unsigned long long)dirty);
log_print_unless_silent("This command can be cancelled and rerun to complete writecache detach.");
sleep(5);
goto retry;
}
if (!lr->active_begin) {
/*
* The LV was not active to begin so we should leave it inactive at the end.
* It will remain inactive during detach since it's clean and doesn't need
* a flush message.
*/
if (!deactivate_lv(cmd, lv))
stack;
}
log_print("Detaching writecache completed cleaning.");
lv_fast = first_seg(lv)->writecache;
/*
* When the cleaner has finished, we can detach with noflush since
* the cleaner has done the flushing.
*/
if (!lv_detach_writecache_cachevol(lv, 1)) {
log_error("Detaching writecache cachevol failed.");
goto out_release;
}
/*
* The detach was started by an uncache command that wants to remove
* the cachevol after detaching.
*/
if (lr->remove_cache) {
if (lvremove_single(cmd, lv_fast, NULL) != ECMD_PROCESSED) {
log_error("Removing the writecache cachevol failed.");
goto out_release;
}
}
ret = 1;
out_release:
if (ret)
log_print_unless_silent("Logical volume %s write cache has been detached.", display_lvname(lv));
unlock_and_release_vg(cmd, vg, vg->name);
out_lockd:
if (!lockd_vg(cmd, id->vg_name, "un", 0, &lockd_state))
stack;
return ret;
}
static int _writecache_zero(struct cmd_context *cmd, struct logical_volume *lv)
{
struct wipe_params wp = {
.do_wipe_signatures = 1, /* optional, to print warning if clobbering something */
.do_zero = 1, /* required for dm-writecache to work */
.yes = arg_count(cmd, yes_ARG),
.force = arg_count(cmd, force_ARG)
};
int ret;
if (!(lv->status & LVM_WRITE)) {
log_error("Cannot initialize readonly LV %s", display_lvname(lv));
return 0;
}
if (test_mode())
return 1;
if (!activate_lv(cmd, lv)) {
log_error("Failed to activate LV %s for zeroing.", display_lvname(lv));
return 0;
}
if (!(ret = wipe_lv(lv, wp)))
stack;
if (!deactivate_lv(cmd, lv)) {
log_error("Failed to deactivate LV %s for zeroing.", display_lvname(lv));
ret = 0;
}
return ret;
}
static struct logical_volume *_lv_writecache_create(struct cmd_context *cmd,
struct logical_volume *lv,
struct logical_volume *lv_fast,
uint32_t block_size_sectors,
struct writecache_settings *settings)
{
struct logical_volume *lv_wcorig;
const struct segment_type *segtype;
struct lv_segment *seg;
/* should lv_fast get a new status flag indicating it's the cache in a writecache LV? */
if (!(segtype = get_segtype_from_string(cmd, SEG_TYPE_NAME_WRITECACHE)))
return_NULL;
lv->status |= WRITECACHE;
/*
* "lv_wcorig" is a new LV with new id, but with the segments from "lv".
* "lv" keeps the existing name and id, but gets a new writecache segment,
* in place of the segments that were moved to lv_wcorig.
*/
if (!(lv_wcorig = insert_layer_for_lv(cmd, lv, WRITECACHE, "_wcorig")))
return_NULL;
lv_set_hidden(lv_fast);
seg = first_seg(lv);
seg->segtype = segtype;
seg->writecache = lv_fast;
/* writecache_block_size is in bytes */
seg->writecache_block_size = block_size_sectors * 512;
memcpy(&seg->writecache_settings, settings, sizeof(struct writecache_settings));
if (!add_seg_to_segs_using_this_lv(lv_fast, seg))
return_NULL;
return lv_wcorig;
}
/*
* Currently only supports writecache block sizes 512 and 4096.
* This could be expanded later.
*/
static int _set_writecache_block_size(struct cmd_context *cmd,
struct logical_volume *lv,
uint32_t *block_size_sectors)
{
char pathname[PATH_MAX];
struct dm_list pvs_list;
struct pv_list *pvl;
uint32_t fs_block_size = 0;
uint32_t block_size_setting = 0;
uint32_t block_size = 0;
int lbs_unknown = 0, lbs_4k = 0, lbs_512 = 0;
int pbs_unknown = 0, pbs_4k = 0, pbs_512 = 0;
int rv = 0;
/* This is set if the user specified a writecache block size on the command line. */
if (*block_size_sectors)
block_size_setting = *block_size_sectors * 512;
dm_list_init(&pvs_list);
if (!get_pv_list_for_lv(cmd->mem, lv, &pvs_list)) {
log_error("Failed to build list of PVs for %s.", display_lvname(lv));
goto bad;
}
dm_list_iterate_items(pvl, &pvs_list) {
unsigned int pbs = 0;
unsigned int lbs = 0;
if (!dev_get_direct_block_sizes(pvl->pv->dev, &pbs, &lbs)) {
lbs_unknown++;
pbs_unknown++;
continue;
}
if (lbs == 4096)
lbs_4k++;
else if (lbs == 512)
lbs_512++;
else
lbs_unknown++;
if (pbs == 4096)
pbs_4k++;
else if (pbs == 512)
pbs_512++;
else
pbs_unknown++;
}
if (lbs_4k && lbs_512) {
log_error("Writecache requires consistent logical block size for LV devices.");
goto bad;
}
if (lbs_4k && block_size_setting && (block_size_setting < 4096)) {
log_error("Writecache block size %u not allowed with device logical block size 4096.",
block_size_setting);
goto bad;
}
/*
* When attaching writecache to thin pool data, the fs block sizes
* would need to be checked on each thin LV which isn't practical, so
* default to 512, and require the user to specify 4k when appropriate.
*/
if (lv_is_thin_pool(lv) || lv_is_thin_pool_data(lv)) {
if (block_size_setting)
block_size = block_size_setting;
else
block_size = 512;
log_print("Using writecache block size %u for thin pool data, logical block size %u, physical block size %u.",
block_size, lbs_4k ? 4096 : 512, pbs_4k ? 4096 : 512);
goto out;
}
if (dm_snprintf(pathname, sizeof(pathname), "%s/%s/%s", cmd->dev_dir,
lv->vg->name, lv->name) < 0) {
log_error("Path name too long to get LV block size %s", display_lvname(lv));
goto bad;
}
if (test_mode()) {
log_print("Test mode skips checking fs block size.");
fs_block_size = 0;
goto skip_fs;
}
/*
* get_fs_block_size() returns the libblkid BLOCK_SIZE value,
* where libblkid has fs-specific code to set BLOCK_SIZE to the
* value we need here.
*
* The term "block size" here may not equate directly to what the fs
* calls the block size, e.g. xfs calls this the sector size (and
* something different the block size); while ext4 does call this
* value the block size, but it's possible values are not the same
* as xfs's, and do not seem to relate directly to the device LBS.
*
* With 512 LBS and 4K PBS, mkfs.xfs will use xfs sector size 4K.
*/
rv = get_fs_block_size(pathname, &fs_block_size);
skip_fs:
if (!rv || !fs_block_size) {
if (block_size_setting)
block_size = block_size_setting;
else
block_size = 4096;
log_print("Using writecache block size %u for unknown file system block size, logical block size %u, physical block size %u.",
block_size, lbs_4k ? 4096 : 512, pbs_4k ? 4096 : 512);
if (block_size != 512) {
log_warn("WARNING: unable to detect a file system block size on %s", display_lvname(lv));
log_warn("WARNING: using a writecache block size larger than the file system block size may corrupt the file system.");
if (!arg_is_set(cmd, yes_ARG) &&
yes_no_prompt("Use writecache block size %u? [y/n]: ", block_size) == 'n') {
log_error("Conversion aborted.");
goto bad;
}
}
goto out;
}
if (!block_size_setting) {
/* User did not specify a block size, so choose according to fs block size. */
if (fs_block_size == 4096)
block_size = 4096;
else if (fs_block_size == 512)
block_size = 512;
else if (fs_block_size > 4096)
block_size = 4096;
else if (fs_block_size < 4096)
block_size = 512;
else
goto_bad;
} else {
if (block_size_setting <= fs_block_size)
block_size = block_size_setting;
else {
log_error("Writecache block size %u cannot be larger than file system block size %u.",
block_size_setting, fs_block_size);
goto bad;
}
}
out:
if (block_size == 512)
*block_size_sectors = 1;
else if (block_size == 4096)
*block_size_sectors = 8;
else
goto_bad;
return 1;
bad:
return 0;
}
int lvconvert_writecache_attach_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct volume_group *vg = lv->vg;
struct logical_volume *lv_update;
struct logical_volume *lv_wcorig;
struct logical_volume *lv_fast;
struct writecache_settings settings = { 0 };
const char *fast_name;
uint32_t block_size_sectors = 0;
char *lockd_fast_args = NULL;
char *lockd_fast_name = NULL;
struct id lockd_fast_id;
char cvol_name[NAME_LEN];
int is_active;
/*
* User specifies an existing cachevol to use or a cachedevice
* to create a cachevol from.
*/
if ((fast_name = arg_str_value(cmd, cachevol_ARG, NULL))) {
if (!validate_lvname_param(cmd, &vg->name, &fast_name))
goto_bad;
if (!(lv_fast = find_lv(vg, fast_name))) {
log_error("LV %s not found.", fast_name);
goto bad;
}
if (lv_fast == lv) {
log_error("Invalid cachevol LV.");
goto bad;
}
if (lv_is_cache_vol(lv_fast)) {
log_error("LV %s is already used as a cachevol.", display_lvname(lv_fast));
goto bad;
}
if (!seg_is_linear(first_seg(lv_fast))) {
log_error("LV %s must be linear to use as a writecache.", display_lvname(lv_fast));
goto bad;
}
/* fast LV shouldn't generally be active by itself, but just in case. */
if (lv_is_active(lv_fast)) {
log_error("LV %s must be inactive to attach.", display_lvname(lv_fast));
goto bad;
}
if (!arg_is_set(cmd, yes_ARG) &&
yes_no_prompt("Erase all existing data on %s? [y/n]: ", display_lvname(lv_fast)) == 'n') {
log_error("Conversion aborted.");
goto bad;
}
} else {
if (!_lv_create_cachevol(cmd, vg, lv, &lv_fast))
goto_bad;
}
is_active = lv_is_active(lv);
if (!get_writecache_settings(cmd, &settings, &block_size_sectors)) {
log_error("Invalid writecache settings.");
goto bad;
}
if (!is_active) {
/* checking block size of fs on the lv requires the lv to be active */
if (!activate_lv(cmd, lv)) {
log_error("Failed to activate LV to check block size %s", display_lvname(lv));
goto bad;
}
if (!sync_local_dev_names(cmd)) {
log_error("Failed to sync local dev names.");
if (!deactivate_lv(cmd, lv))
stack;
goto bad;
}
}
if (!_set_writecache_block_size(cmd, lv, &block_size_sectors)) {
if (!is_active && !deactivate_lv(cmd, lv))
stack;
goto_bad;
}
if (!is_active) {
if (!deactivate_lv(cmd, lv)) {
log_error("Failed to deactivate LV after checking block size %s", display_lvname(lv));
goto bad;
}
}
/* Ensure the LV is not active elsewhere. */
if (!lockd_lv(cmd, lv, "ex", 0))
goto_bad;
if (fast_name && !lockd_lv(cmd, lv_fast, "ex", 0))
goto_bad;
/*
* lv keeps the same lockd lock it had before, the lock for
* lv_fast is kept but is not used while it's attached, and
* lv_wcorig gets no lock.
*/
if (vg_is_shared(vg) && lv_fast->lock_args) {
lockd_fast_args = dm_pool_strdup(cmd->mem, lv_fast->lock_args);
lockd_fast_name = dm_pool_strdup(cmd->mem, lv_fast->name);
memcpy(&lockd_fast_id, &lv_fast->lvid.id[1], sizeof(struct id));
}
if (!_writecache_zero(cmd, lv_fast)) {
log_error("LV %s could not be zeroed.", display_lvname(lv_fast));
return ECMD_FAILED;
}
/*
* The lvm tradition is to rename an LV with a special role-specific
* suffix when it becomes hidden. Here the _cvol suffix is added to
* the fast LV name. When the cache is detached, it's renamed back.
*/
if (dm_snprintf(cvol_name, sizeof(cvol_name), "%s_cvol", lv_fast->name) < 0) {
log_error("Can't prepare new metadata name for %s.", display_lvname(lv_fast));
return ECMD_FAILED;
}
if (!lv_rename_update(cmd, lv_fast, cvol_name, 0))
return_ECMD_FAILED;
lv_fast->status |= LV_CACHE_VOL;
/* When the lv arg is a thinpool, redirect update to data sub lv. */
if (lv_is_thin_pool(lv)) {
lv_update = seg_lv(first_seg(lv), 0);
log_verbose("Redirecting operation to data sub LV %s.", display_lvname(lv_update));
} else {
lv_update = lv;
}
/*
* Changes the vg struct to match the desired state.
*
* - lv keeps existing lv name and id, gets new segment with segtype
* "writecache".
*
* - lv_fast keeps its existing name and id, becomes hidden.
*
* - lv_wcorig gets new name (existing name + _wcorig suffix),
* gets new id, becomes hidden, gets segments from lv.
*/
if (!(lv_wcorig = _lv_writecache_create(cmd, lv_update, lv_fast, block_size_sectors, &settings)))
goto_bad;
/*
* vg_write(), suspend_lv(), vg_commit(), resume_lv(),
* where the old LV is suspended and the new LV is resumed.
*/
if (!lv_update_and_reload(lv_update))
goto_bad;
lockd_lv(cmd, lv, "un", 0);
if (lockd_fast_name) {
/* lockd unlock for lv_fast */
if (!lockd_lv_name(cmd, vg, lockd_fast_name, &lockd_fast_id, lockd_fast_args, "un", 0))
log_error("Failed to unlock fast LV %s/%s", vg->name, lockd_fast_name);
}
log_print_unless_silent("Logical volume %s now has writecache.",
display_lvname(lv));
return ECMD_PROCESSED;
bad:
return ECMD_FAILED;
}
int lvconvert_to_writecache_cmd(struct cmd_context *cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_result lr = { 0 };
int ret;
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lr;
cmd->cname->flags &= ~GET_VGNAME_FROM_OPTIONS;
ret = process_each_lv(cmd, cmd->position_argc, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE, handle, NULL,
&lvconvert_writecache_attach_single);
destroy_processing_handle(cmd, handle);
return ret;
}
int lvconvert_to_cache_with_cachevol_cmd(struct cmd_context *cmd, int argc, char **argv)
{
struct processing_handle *handle;
struct lvconvert_result lr = { 0 };
int ret;
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
handle->custom_handle = &lr;
cmd->cname->flags &= ~GET_VGNAME_FROM_OPTIONS;
ret = process_each_lv(cmd, cmd->position_argc, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE, handle, NULL,
&lvconvert_cachevol_attach_single);
destroy_processing_handle(cmd, handle);
return ret;
}
static int _lvconvert_integrity_remove(struct cmd_context *cmd, struct logical_volume *lv)
{
int ret = 0;
if (!lv_is_integrity(lv) && !lv_is_raid(lv)) {
log_error("LV does not have integrity.");
return 0;
}
/* ensure it's not active elsewhere. */
if (!lockd_lv(cmd, lv, "ex", 0))
return_0;
if (lv_is_raid(lv))
ret = lv_remove_integrity_from_raid(lv);
if (!ret)
return_0;
log_print_unless_silent("Logical volume %s has removed integrity.", display_lvname(lv));
return 1;
}
static int _lvconvert_integrity_add(struct cmd_context *cmd, struct logical_volume *lv,
struct integrity_settings *set)
{
struct volume_group *vg = lv->vg;
struct dm_list *use_pvh;
int ret = 0;
/* ensure it's not active elsewhere. */
if (!lockd_lv(cmd, lv, "ex", 0))
return_0;
if (cmd->position_argc > 1) {
/* First pos arg is required LV, remaining are optional PVs. */
if (!(use_pvh = create_pv_list(cmd->mem, vg, cmd->position_argc - 1, cmd->position_argv + 1, 0)))
return_0;
} else
use_pvh = &vg->pvs;
if (lv_is_partial(lv)) {
log_error("Cannot add integrity while LV is missing PVs.");
return 0;
}
if (lv_is_raid(lv))
ret = lv_add_integrity_to_raid(lv, set, use_pvh, NULL);
if (!ret)
return_0;
log_print_unless_silent("Logical volume %s has added integrity.", display_lvname(lv));
return 1;
}
static int _lvconvert_integrity_single(struct cmd_context *cmd,
struct logical_volume *lv,
struct processing_handle *handle)
{
struct integrity_settings settings;
int ret = 0;
memset(&settings, 0, sizeof(settings));
if (!integrity_mode_set(arg_str_value(cmd, raidintegritymode_ARG, NULL), &settings))
return_ECMD_FAILED;
if (arg_is_set(cmd, raidintegrityblocksize_ARG))
settings.block_size = arg_int_value(cmd, raidintegrityblocksize_ARG, 0);
if (arg_int_value(cmd, raidintegrity_ARG, 0))
ret = _lvconvert_integrity_add(cmd, lv, &settings);
else
ret = _lvconvert_integrity_remove(cmd, lv);
if (!ret)
return ECMD_FAILED;
return ECMD_PROCESSED;
}
int lvconvert_integrity_cmd(struct cmd_context *cmd, int argc, char **argv)
{
struct processing_handle *handle;
int ret;
if (!(handle = init_processing_handle(cmd, NULL))) {
log_error("Failed to initialize processing handle.");
return ECMD_FAILED;
}
/* Want to be able to remove integrity from partial LV */
cmd->handles_missing_pvs = 1;
cmd->cname->flags &= ~GET_VGNAME_FROM_OPTIONS;
ret = process_each_lv(cmd, cmd->position_argc, cmd->position_argv, NULL, NULL, READ_FOR_UPDATE, handle, NULL,
&_lvconvert_integrity_single);
destroy_processing_handle(cmd, handle);
return ret;
}
/*
* All lvconvert command defs have their own function,
* so the generic function name is unused.
*/
int lvconvert(struct cmd_context *cmd, int argc, char **argv)
{
log_error(INTERNAL_ERROR "Missing function for command definition %d:%s.",
cmd->command->command_index, cmd->command->command_id);
return ECMD_FAILED;
}
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