static int _lvchange_activate(struct cmd_context *cmd, struct logical_volume *lv)
{
int activate;
activate = arg_uint_value(cmd, activate_ARG, 0);
if (lv_is_cow(lv) && !lv_is_virtual_origin(origin_from_cow(lv)))
lv = origin_from_cow(lv);
if (activate == CHANGE_AAY) {
if (!lv_passes_auto_activation_filter(cmd, lv))
return 1;
activate = CHANGE_ALY;
}
if (activate == CHANGE_ALN) {
log_verbose("Deactivating logical volume \"%s\" locally",
lv->name);
if (!deactivate_lv_local(cmd, lv))
return_0;
} else if (activate == CHANGE_AN) {
log_verbose("Deactivating logical volume \"%s\"", lv->name);
if (!deactivate_lv(cmd, lv))
return_0;
} else {
if ((activate == CHANGE_AE) ||
lv_is_origin(lv) ||
lv_is_thin_type(lv)) {
log_verbose("Activating logical volume \"%s\" "
"exclusively", lv->name);
if (!activate_lv_excl(cmd, lv))
return_0;
} else if (activate == CHANGE_ALY) {
log_verbose("Activating logical volume \"%s\" locally",
lv->name);
if (!activate_lv_local(cmd, lv))
return_0;
} else {
log_verbose("Activating logical volume \"%s\"",
lv->name);
if (!activate_lv(cmd, lv))
return_0;
}
if (background_polling())
lv_spawn_background_polling(cmd, lv);
}
return 1;
}
int lv_is_visible(const struct logical_volume *lv)
{
if (lv->status & SNAPSHOT)
return 0;
if (lv_is_cow(lv)) {
if (lv_is_virtual_origin(origin_from_cow(lv)))
return 1;
return lv_is_visible(origin_from_cow(lv));
}
return lv->status & VISIBLE_LV ? 1 : 0;
}
int lv_is_visible(const struct logical_volume *lv)
{
if (lv_is_historical(lv))
return 1;
if (lv_is_snapshot(lv))
return 0;
if (lv_is_cow(lv)) {
if (lv_is_virtual_origin(origin_from_cow(lv)))
return 1;
if (lv_is_merging_cow(lv))
return 0;
return lv_is_visible(origin_from_cow(lv));
}
return lv->status & VISIBLE_LV ? 1 : 0;
}
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)
{
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;
}
int lv_is_cow_covering_origin(const struct logical_volume *lv)
{
return lv_is_cow(lv) &&
(lv->size >= _cow_max_size(lv->vg->cmd, origin_from_cow(lv)->size,
find_snapshot(lv)->chunk_size));
}
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;
}
