static void treatstackoption (lv_State *L, lv_State *L1, const char *fname) {
if (L == L1) {
lv_pushvalue(L, -2);
lv_remove(L, -3);
}
else
lv_xmove(L1, L, 1);
lv_setfield(L, -2, fname);
}
int vg_remove_snapshot(struct logical_volume *cow)
{
int preload_origin = 0;
struct logical_volume *origin = origin_from_cow(cow);
dm_list_del(&cow->snapshot->origin_list);
origin->origin_count--;
if (find_merging_cow(origin) == find_cow(cow)) {
clear_snapshot_merge(origin);
/*
* preload origin IFF "snapshot-merge" target is active
* - IMPORTANT: avoids preload if onactivate merge is pending
*/
if (lv_has_target_type(origin->vg->cmd->mem, origin, NULL,
"snapshot-merge")) {
/*
* preload origin to:
* - allow proper release of -cow
* - avoid allocations with other devices suspended
* when transitioning from "snapshot-merge" to
* "snapshot-origin after a merge completes.
*/
preload_origin = 1;
}
}
if (!lv_remove(cow->snapshot->lv)) {
log_error("Failed to remove internal snapshot LV %s",
cow->snapshot->lv->name);
return 0;
}
cow->snapshot = NULL;
lv_set_visible(cow);
if (preload_origin) {
if (!vg_write(origin->vg))
return_0;
if (!suspend_lv(origin->vg->cmd, origin)) {
log_error("Failed to refresh %s without snapshot.",
origin->name);
return 0;
}
if (!vg_commit(origin->vg))
return_0;
if (!resume_lv(origin->vg->cmd, origin)) {
log_error("Failed to resume %s.", origin->name);
return 0;
}
}
return 1;
}
int vg_remove_snapshot(struct logical_volume *cow)
{
dm_list_del(&cow->snapshot->origin_list);
cow->snapshot->origin->origin_count--;
if (!lv_remove(cow->snapshot->lv)) {
log_error("Failed to remove internal snapshot LV %s",
cow->snapshot->lv->name);
return 0;
}
cow->snapshot = NULL;
lv_set_visible(cow);
return 1;
}
static int db_gethook (lv_State *L) {
int arg;
lv_State *L1 = getthread(L, &arg);
char buff[5];
int mask = lv_gethookmask(L1);
lv_Hook hook = lv_gethook(L1);
if (hook != NULL && hook != hookf) /* external hook? */
lv_pushliteral(L, "external hook");
else {
gethooktable(L);
lv_pushlightuserdata(L, L1);
lv_rawget(L, -2); /* get hook */
lv_remove(L, -2); /* remove hook table */
}
lv_pushstring(L, unmakemask(mask, buff));
lv_pushinteger(L, lv_gethookcount(L1));
return 3;
}
int vg_remove_snapshot(struct logical_volume *cow)
{
int merging_snapshot = 0;
struct logical_volume *origin = origin_from_cow(cow);
int is_origin_active = lv_is_active(origin);
if (is_origin_active &&
lv_is_virtual_origin(origin)) {
if (!deactivate_lv(origin->vg->cmd, origin)) {
log_error("Failed to deactivate logical volume \"%s\"",
origin->name);
return 0;
}
is_origin_active = 0;
}
dm_list_del(&cow->snapshot->origin_list);
origin->origin_count--;
if (lv_is_merging_origin(origin) &&
(find_snapshot(origin) == find_snapshot(cow))) {
clear_snapshot_merge(origin);
/*
* preload origin IFF "snapshot-merge" target is active
* - IMPORTANT: avoids preload if inactivate merge is pending
*/
if (lv_has_target_type(origin->vg->vgmem, origin, NULL,
TARGET_NAME_SNAPSHOT_MERGE)) {
/*
* preload origin to:
* - allow proper release of -cow
* - avoid allocations with other devices suspended
* when transitioning from "snapshot-merge" to
* "snapshot-origin after a merge completes.
*/
merging_snapshot = 1;
}
}
if (!lv_remove(cow->snapshot->lv)) {
log_error("Failed to remove internal snapshot LV %s",
cow->snapshot->lv->name);
return 0;
}
cow->snapshot = NULL;
lv_set_visible(cow);
/* format1 must do the change in one step, with the commit last. */
if (!(origin->vg->fid->fmt->features & FMT_MDAS)) {
/* Get the lock for COW volume */
if (is_origin_active && !activate_lv(cow->vg->cmd, cow)) {
log_error("Unable to activate logical volume \"%s\"",
cow->name);
return 0;
}
return 1;
}
if (!vg_write(origin->vg))
return_0;
/* Skip call suspend, if device is not active */
if (is_origin_active && !suspend_lv(origin->vg->cmd, origin)) {
log_error("Failed to refresh %s without snapshot.",
origin->name);
vg_revert(origin->vg);
return 0;
}
if (!vg_commit(origin->vg))
return_0;
if (is_origin_active) {
/*
* If the snapshot was active and the COW LV is taken away
* the LV lock on cluster has to be grabbed, so use
* activate_lv() which resumes suspend cow device.
*/
if (!merging_snapshot && !activate_lv(cow->vg->cmd, cow)) {
log_error("Failed to activate %s.", cow->name);
return 0;
}
if (!resume_lv(origin->vg->cmd, origin)) {
log_error("Failed to resume %s.", origin->name);
return 0;
}
/*
* For merged snapshot and clustered VG activate cow LV so
* the following call to deactivate_lv() can clean-up table
* entries. For this clustered lock need to be held.
*/
if (vg_is_clustered(cow->vg) &&
merging_snapshot && !activate_lv(cow->vg->cmd, cow)) {
log_error("Failed to activate %s.", cow->name);
return 0;
}
}
return 1;
}
static int lvremove_single(struct cmd_context *cmd, struct logical_volume *lv,
void *handle) // __attribute((unused)))
{
struct volume_group *vg;
struct lvinfo info;
struct logical_volume *origin = NULL;
vg = lv->vg;
if (!vg_check_status(vg, LVM_WRITE))
return ECMD_FAILED;
if (lv_is_origin(lv)) {
log_error("Can't remove logical volume \"%s\" under snapshot",
lv->name);
return ECMD_FAILED;
}
if (lv->status & MIRROR_IMAGE) {
log_error("Can't remove logical volume %s used by a mirror",
lv->name);
return ECMD_FAILED;
}
if (lv->status & MIRROR_LOG) {
log_error("Can't remove logical volume %s used as mirror log",
lv->name);
return ECMD_FAILED;
}
if (lv->status & LOCKED) {
log_error("Can't remove locked LV %s", lv->name);
return ECMD_FAILED;
}
/* FIXME Ensure not referred to by another existing LVs */
if (lv_info(cmd, lv, &info, 1)) {
if (info.open_count) {
log_error("Can't remove open logical volume \"%s\"",
lv->name);
return ECMD_FAILED;
}
if (info.exists && !arg_count(cmd, force_ARG)) {
if (yes_no_prompt("Do you really want to remove active "
"logical volume \"%s\"? [y/n]: ",
lv->name) == 'n') {
log_print("Logical volume \"%s\" not removed",
lv->name);
return ECMD_FAILED;
}
}
}
if (!archive(vg))
return ECMD_FAILED;
/* If the VG is clustered then make sure no-one else is using the LV
we are about to remove */
if (vg_status(vg) & CLUSTERED) {
if (!activate_lv_excl(cmd, lv)) {
log_error("Can't get exclusive access to volume \"%s\"",
lv->name);
return ECMD_FAILED;
}
}
/* FIXME Snapshot commit out of sequence if it fails after here? */
if (!deactivate_lv(cmd, lv)) {
log_error("Unable to deactivate logical volume \"%s\"",
lv->name);
return ECMD_FAILED;
}
if (lv_is_cow(lv)) {
origin = origin_from_cow(lv);
log_verbose("Removing snapshot %s", lv->name);
if (!vg_remove_snapshot(lv)) {
stack;
return ECMD_FAILED;
}
}
log_verbose("Releasing logical volume \"%s\"", lv->name);
if (!lv_remove(lv)) {
log_error("Error releasing logical volume \"%s\"", lv->name);
return ECMD_FAILED;
}
/* store it on disks */
if (!vg_write(vg))
return ECMD_FAILED;
backup(vg);
if (!vg_commit(vg))
return ECMD_FAILED;
/* If no snapshots left, reload without -real. */
if (origin && !lv_is_origin(origin)) {
if (!suspend_lv(cmd, origin))
log_error("Failed to refresh %s without snapshot.", origin->name);
else if (!resume_lv(cmd, origin))
log_error("Failed to resume %s.", origin->name);
}
log_print("Logical volume \"%s\" successfully removed", lv->name);
return ECMD_PROCESSED;
}
/*
* lv_cache_remove
* @cache_lv
*
* Given a cache LV, remove the cache layer. This will unlink
* the origin and cache_pool, remove the cache LV layer, and promote
* the origin to a usable non-cached LV of the same name as the
* given cache_lv.
*
* Returns: 1 on success, 0 on failure
*/
int lv_cache_remove(struct logical_volume *cache_lv)
{
struct cmd_context *cmd = cache_lv->vg->cmd;
const char *policy_name;
uint64_t dirty_blocks;
struct lv_segment *cache_seg = first_seg(cache_lv);
struct logical_volume *corigin_lv;
struct logical_volume *cache_pool_lv;
if (!lv_is_cache(cache_lv)) {
log_error(INTERNAL_ERROR "LV %s is not cached.", cache_lv->name);
return 0;
}
/* Active volume is needed (writeback only?) */
if (!lv_is_active_locally(cache_lv) &&
!activate_lv_excl_local(cache_lv->vg->cmd, cache_lv)) {
log_error("Failed to active cache locally %s.", cache_lv->name);
return 0;
}
/*
* FIXME:
* Before the link can be broken, we must ensure that the
* cache has been flushed. This may already be the case
* if the cache mode is writethrough (or the cleaner
* policy is in place from a previous half-finished attempt
* to remove the cache_pool). It could take a long time to
* flush the cache - it should probably be done in the background.
*
* Also, if we do perform the flush in the background and we
* happen to also be removing the cache/origin LV, then we
* could check if the cleaner policy is in place and simply
* remove the cache_pool then without waiting for the flush to
* complete.
*/
if (!lv_cache_policy_info(cache_lv, &policy_name, NULL, NULL))
return_0;
if (strcmp(policy_name, "cleaner")) {
/* We must swap in the cleaner to flush the cache */
log_print_unless_silent("Flushing cache for %s.", cache_lv->name);
/*
* Is there are clean way to free the memory for the name
* and argv when changing the policy?
*/
cache_seg->policy_name = "cleaner";
cache_seg->policy_argc = 0;
cache_seg->policy_argv = NULL;
/* update the kernel to put the cleaner policy in place */
if (!vg_write(cache_lv->vg))
return_0;
if (!suspend_lv(cmd, cache_lv))
return_0;
if (!vg_commit(cache_lv->vg))
return_0;
if (!resume_lv(cmd, cache_lv))
return_0;
}
//FIXME: use polling to do this...
do {
if (!lv_cache_block_info(cache_lv, NULL,
&dirty_blocks, NULL, NULL))
return_0;
log_print_unless_silent("%" PRIu64 " blocks must still be flushed.",
dirty_blocks);
if (dirty_blocks)
sleep(1);
} while (dirty_blocks);
cache_pool_lv = cache_seg->pool_lv;
if (!detach_pool_lv(cache_seg))
return_0;
/* Regular LV which user may remove if there are problems */
corigin_lv = seg_lv(cache_seg, 0);
lv_set_visible(corigin_lv);
if (!remove_layer_from_lv(cache_lv, corigin_lv))
return_0;
if (!vg_write(cache_lv->vg))
return_0;
/*
* suspend_lv on this cache LV suspends all components:
* - the top-level cache LV
* - the origin
* - the cache_pool _cdata and _cmeta
*/
if (!suspend_lv(cmd, cache_lv))
return_0;
if (!vg_commit(cache_lv->vg))
return_0;
/* resume_lv on this (former) cache LV will resume all */
/*
* FIXME: currently we can't easily avoid execution of
* blkid on resumed error device
*/
if (!resume_lv(cmd, cache_lv))
return_0;
/*
* cleanup orphan devices
*
* FIXME:
* fix _add_dev() to support this case better
* since the should be handled interanlly by resume_lv()
* which should autoremove any orhpans
*/
if (!_cleanup_orphan_lv(corigin_lv)) /* _corig */
return_0;
if (!_cleanup_orphan_lv(seg_lv(first_seg(cache_pool_lv), 0))) /* _cdata */
return_0;
if (!_cleanup_orphan_lv(first_seg(cache_pool_lv)->metadata_lv)) /* _cmeta */
return_0;
if (!lv_remove(corigin_lv))
return_0;
return 1;
}
