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lvm2/lib/activate/activate.c
Zdenek Kabelac b63e54d0ed dev_manager: remove disable_dm_dev flag 
Lvm currenly drops cache before first table manipulation
there is no need for this flag ATM.
2024-05-27 15:35:57 +02:00

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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2018 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 "lib/misc/lib.h"
#include "lib/metadata/metadata.h"
#include "lib/activate/activate.h"
#include "lib/mm/memlock.h"
#include "lib/display/display.h"
#include "fs.h"
#include "lib/misc/lvm-exec.h"
#include "lib/misc/lvm-file.h"
#include "lib/misc/lvm-string.h"
#include "lib/commands/toolcontext.h"
#include "dev_manager.h"
#include "lib/datastruct/str_list.h"
#include "lib/config/config.h"
#include "lib/metadata/segtype.h"
#include "lib/misc/sharedlib.h"
#include "lib/metadata/metadata.h"
#include "lib/misc/lvm-signal.h"
#include <limits.h>
#include <fcntl.h>
#include <unistd.h>
#define _skip(fmt, args...) log_very_verbose("Skipping: " fmt , ## args)
int list_segment_modules(struct dm_pool *mem, const struct lv_segment *seg,
struct dm_list *modules)
{
unsigned int s;
struct lv_segment *seg2, *snap_seg;
struct dm_list *snh;
if (seg->segtype->ops->modules_needed &&
!seg->segtype->ops->modules_needed(mem, seg, modules)) {
log_error("module string allocation failed");
return 0;
}
if (lv_is_origin(seg->lv))
dm_list_iterate(snh, &seg->lv->snapshot_segs)
if (!list_lv_modules(mem,
dm_list_struct_base(snh,
struct lv_segment,
origin_list)->cow,
modules))
return_0;
if (lv_is_cow(seg->lv)) {
snap_seg = find_snapshot(seg->lv);
if (snap_seg->segtype->ops->modules_needed &&
!snap_seg->segtype->ops->modules_needed(mem, snap_seg,
modules)) {
log_error("snap_seg module string allocation failed");
return 0;
}
}
for (s = 0; s < seg->area_count; s++) {
switch (seg_type(seg, s)) {
case AREA_LV:
seg2 = find_seg_by_le(seg_lv(seg, s), seg_le(seg, s));
if (seg2 && !list_segment_modules(mem, seg2, modules))
return_0;
break;
case AREA_PV:
case AREA_UNASSIGNED:
;
}
}
return 1;
}
int list_lv_modules(struct dm_pool *mem, const struct logical_volume *lv,
struct dm_list *modules)
{
struct lv_segment *seg;
dm_list_iterate_items(seg, &lv->segments)
if (!list_segment_modules(mem, seg, modules))
return_0;
return 1;
}
static int _lv_passes_volumes_filter(struct cmd_context *cmd, const struct logical_volume *lv,
const struct dm_config_node *cn, const int cfg_id)
{
const struct dm_config_value *cv;
const char *str;
static char config_path[PATH_MAX];
size_t len = strlen(lv->vg->name);
config_def_get_path(config_path, sizeof(config_path), cfg_id);
log_verbose("%s configuration setting defined: "
"Checking the list to match %s.",
config_path, display_lvname(lv));
for (cv = cn->v; cv; cv = cv->next) {
if (cv->type == DM_CFG_EMPTY_ARRAY)
goto out;
if (cv->type != DM_CFG_STRING) {
log_print_unless_silent("Ignoring invalid string in config file %s.",
config_path);
continue;
}
str = cv->v.str;
if (!*str) {
log_print_unless_silent("Ignoring empty string in config file %s.",
config_path);
continue;
}
/* Tag? */
if (*str == '@') {
str++;
if (!*str) {
log_print_unless_silent("Ignoring empty tag in config file %s",
config_path);
continue;
}
/* If any host tag matches any LV or VG tag, activate */
if (!strcmp(str, "*")) {
if (str_list_match_list(&cmd->tags, &lv->tags, NULL)
|| str_list_match_list(&cmd->tags,
&lv->vg->tags, NULL))
return 1;
continue;
}
/* If supplied tag matches LV or VG tag, activate */
if (str_list_match_item(&lv->tags, str) ||
str_list_match_item(&lv->vg->tags, str))
return 1;
continue;
}
/* If supplied name is vgname[/lvname] */
if ((strncmp(str, lv->vg->name, len) == 0) &&
(!str[len] ||
((str[len] == '/') &&
!strcmp(str + len + 1, lv->name))))
return 1;
}
out:
log_verbose("No item supplied in %s configuration setting matches %s.",
config_path, display_lvname(lv));
return 0;
}
int lv_passes_auto_activation_filter(struct cmd_context *cmd, struct logical_volume *lv)
{
const struct dm_config_node *cn;
if (!(cn = find_config_tree_array(cmd, activation_auto_activation_volume_list_CFG, NULL))) {
log_verbose("activation/auto_activation_volume_list configuration setting "
"not defined: All logical volumes will be auto-activated.");
return 1;
}
return _lv_passes_volumes_filter(cmd, lv, cn, activation_auto_activation_volume_list_CFG);
}
static int _passes_readonly_filter(struct cmd_context *cmd,
const struct logical_volume *lv)
{
const struct dm_config_node *cn;
if (!(cn = find_config_tree_array(cmd, activation_read_only_volume_list_CFG, NULL)))
return 0;
return _lv_passes_volumes_filter(cmd, lv, cn, activation_read_only_volume_list_CFG);
}
int lv_passes_readonly_filter(const struct logical_volume *lv)
{
return _passes_readonly_filter(lv->vg->cmd, lv);
}
#ifndef DEVMAPPER_SUPPORT
void set_activation(int act, int silent)
{
static int warned = 0;
if (warned || !act)
return;
log_warn("WARNING: Compiled without libdevmapper support. "
"Can't enable activation.");
warned = 1;
}
int activation(void)
{
return 0;
}
int library_version(char *version, size_t size)
{
return 0;
}
int driver_version(char *version, size_t size)
{
return 0;
}
int target_version(const char *target_name, uint32_t *maj,
uint32_t *min, uint32_t *patchlevel)
{
return 0;
}
int target_present(struct cmd_context *cmd, const char *target_name,
int use_modprobe)
{
return 0;
}
int lvm_dm_prefix_check(int major, int minor, const char *prefix)
{
return 0;
}
int lv_info(struct cmd_context *cmd, const struct logical_volume *lv, int use_layer,
struct lvinfo *info, int with_open_count, int with_read_ahead)
{
return 0;
}
int lv_info_with_seg_status(struct cmd_context *cmd,
const struct lv_segment *lv_seg,
struct lv_with_info_and_seg_status *status,
int with_open_count, int with_read_ahead)
{
return 0;
}
int lv_cache_status(const struct logical_volume *cache_lv,
struct lv_status_cache **status)
{
return 0;
}
int lv_check_not_in_use(const struct logical_volume *lv, int error_if_used)
{
return 0;
}
int lv_snapshot_percent(const struct logical_volume *lv, dm_percent_t *percent)
{
return 0;
}
int lv_mirror_percent(struct cmd_context *cmd, const struct logical_volume *lv,
int wait, dm_percent_t *percent, uint32_t *event_nr)
{
return 0;
}
int lv_raid_percent(const struct logical_volume *lv, dm_percent_t *percent)
{
return 0;
}
int lv_raid_data_offset(const struct logical_volume *lv, uint64_t *data_offset)
{
return 0;
}
int lv_raid_dev_health(const struct logical_volume *lv, char **dev_health)
{
return 0;
}
int lv_raid_dev_count(const struct logical_volume *lv, uint32_t *dev_cnt)
{
return 0;
}
int lv_raid_mismatch_count(const struct logical_volume *lv, uint64_t *cnt)
{
return 0;
}
int lv_raid_sync_action(const struct logical_volume *lv, char **sync_action)
{
return 0;
}
int lv_raid_message(const struct logical_volume *lv, const char *msg)
{
return 0;
}
int lv_raid_status(const struct logical_volume *lv, struct lv_status_raid **status)
{
return 0;
}
int lv_writecache_message(const struct logical_volume *lv, const char *msg)
{
return 0;
}
int lv_thin_pool_status(const struct logical_volume *lv, int flush,
struct lv_status_thin_pool **thin_pool_status)
{
return 0;
}
int lv_thin_status(const struct logical_volume *lv, int flush,
struct lv_status_thin **thin_status)
{
return 0;
}
int lv_thin_device_id(const struct logical_volume *lv, uint32_t *device_id)
{
return 0;
}
int lv_vdo_pool_status(const struct logical_volume *lv, int flush,
struct lv_status_vdo **vdo_status)
{
return 0;
}
int lv_vdo_pool_percent(const struct logical_volume *lv, dm_percent_t *percent)
{
return 0;
}
int lv_vdo_pool_size_config(const struct logical_volume *lv,
struct vdo_pool_size_config *cfg)
{
return 0;
}
int lvs_in_vg_activated(const struct volume_group *vg)
{
return 0;
}
int lvs_in_vg_opened(const struct volume_group *vg)
{
return 0;
}
int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only, unsigned exclusive,
const struct logical_volume *lv, const struct logical_volume *lv_pre)
{
return 1;
}
int lv_resume(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only, const struct logical_volume *lv)
{
return 1;
}
int lv_resume_if_active(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only,
unsigned exclusive, unsigned revert, const struct logical_volume *lv)
{
return 1;
}
int lv_deactivate(struct cmd_context *cmd, const char *lvid_s, const struct logical_volume *lv)
{
return 1;
}
int lv_activation_filter(struct cmd_context *cmd, const char *lvid_s,
int *activate_lv, const struct logical_volume *lv)
{
return 1;
}
int lv_activate(struct cmd_context *cmd, const char *lvid_s, int exclusive, int noscan,
int temporary, const struct logical_volume *lv)
{
return 1;
}
int lv_activate_with_filter(struct cmd_context *cmd, const char *lvid_s, int exclusive,
int noscan, int temporary, const struct logical_volume *lv)
{
return 1;
}
int lv_mknodes(struct cmd_context *cmd, const struct logical_volume *lv)
{
return 1;
}
int lv_deactivate_any_missing_subdevs(const struct logical_volume *lv)
{
return 1;
}
int pv_uses_vg(struct physical_volume *pv,
struct volume_group *vg)
{
return 0;
}
void activation_release(void)
{
}
void activation_exit(void)
{
}
int raid4_is_supported(struct cmd_context *cmd, const struct segment_type *segtype)
{
return 1;
}
int lv_is_active(const struct logical_volume *lv)
{
return 0;
}
int lv_check_transient(struct logical_volume *lv)
{
return 1;
}
int monitor_dev_for_events(struct cmd_context *cmd, const struct logical_volume *lv,
const struct lv_activate_opts *laopts, int monitor)
{
return 1;
}
/* fs.c */
void fs_unlock(void)
{
}
/* dev_manager.c */
#include "lib/activate/targets.h"
int add_areas_line(struct dev_manager *dm, struct lv_segment *seg,
struct dm_tree_node *node, uint32_t start_area,
uint32_t areas)
{
return 0;
}
int device_is_usable(struct cmd_context *cmd, struct device *dev, struct dev_usable_check_params check, int *is_lv)
{
return 0;
}
int lv_has_target_type(struct dm_pool *mem, const struct logical_volume *lv,
const char *layer, const char *target_type)
{
return 0;
}
#else /* DEVMAPPER_SUPPORT */
static int _activation = 1;
void set_activation(int act, int silent)
{
if (act == _activation)
return;
_activation = act;
if (_activation)
log_verbose("Activation enabled. Device-mapper kernel "
"driver will be used.");
else if (!silent)
log_warn("WARNING: Activation disabled. No device-mapper "
"interaction will be attempted.");
else
log_verbose("Activation disabled. No device-mapper "
"interaction will be attempted.");
}
int activation(void)
{
return _activation;
}
static int _passes_activation_filter(struct cmd_context *cmd,
const struct logical_volume *lv)
{
const struct dm_config_node *cn;
if (!(cn = find_config_tree_array(cmd, activation_volume_list_CFG, NULL))) {
log_verbose("activation/volume_list configuration setting "
"not defined: Checking only host tags for %s.",
display_lvname(lv));
/* If no host tags defined, activate */
if (dm_list_empty(&cmd->tags))
return 1;
/* If any host tag matches any LV or VG tag, activate */
if (str_list_match_list(&cmd->tags, &lv->tags, NULL) ||
str_list_match_list(&cmd->tags, &lv->vg->tags, NULL))
return 1;
log_verbose("No host tag matches %s", display_lvname(lv));
/* Don't activate */
return 0;
}
return _lv_passes_volumes_filter(cmd, lv, cn, activation_volume_list_CFG);
}
int library_version(char *version, size_t size)
{
if (!activation())
return 0;
return dm_get_library_version(version, size);
}
int driver_version(char *version, size_t size)
{
static char _vsn[80] = { 0 };
if (!activation())
return 0;
log_very_verbose("Getting driver version");
if (!_vsn[0] &&
!dm_driver_version(_vsn, sizeof(_vsn)))
return_0;
dm_strncpy(version, _vsn, size);
return 1;
}
int target_version(const char *target_name, uint32_t *maj,
uint32_t *min, uint32_t *patchlevel)
{
int r = 0;
struct dm_task *dmt;
struct dm_versions *target, *last_target;
log_very_verbose("Getting target version for %s", target_name);
if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
return_0;
if (activation_checks() && !dm_task_enable_checks(dmt))
goto_out;
if (!dm_task_run(dmt)) {
log_debug_activation("Failed to get %s target version", target_name);
/* Assume this was because LIST_VERSIONS isn't supported */
*maj = 0;
*min = 0;
*patchlevel = 0;
r = 1;
goto out;
}
target = dm_task_get_versions(dmt);
do {
last_target = target;
if (!strcmp(target_name, target->name)) {
r = 1;
*maj = target->version[0];
*min = target->version[1];
*patchlevel = target->version[2];
goto out;
}
target = (struct dm_versions *)((char *) target + target->next);
} while (last_target != target);
out:
if (r)
log_very_verbose("Found %s target "
"v%" PRIu32 ".%" PRIu32 ".%" PRIu32 ".",
target_name, *maj, *min, *patchlevel);
dm_task_destroy(dmt);
return r;
}
int lvm_dm_prefix_check(int major, int minor, const char *prefix)
{
return dev_manager_check_prefix_dm_major_minor(major, minor, prefix);
}
/* Search modules.builtin file for built-in kernel module */
static int _check_modules_builtin(struct cmd_context *cmd, const char *target)
{
FILE *fp;
char *line = NULL;
size_t len;
int r = 0;
char path[PATH_MAX];
if (dm_snprintf(path, sizeof(path), "%s/%s/modules.builtin",
MODULES_PATH, cmd->kernel_vsn) < 0) {
log_debug_activation("Modules path %s/%s/modules.builtin is too long.",
MODULES_PATH, cmd->kernel_vsn);
return 0;
}
if (!(fp = fopen(path, "r"))) {
if (errno != ENOENT)
log_sys_debug("fopen", path);
return 0;
}
while (getline(&line, &len, fp) > 0)
if (strstr(line, target)) {
log_debug_activation("Found %s as built-in kernel module.", target);
r = 1;
break;
}
free(line);
if (fclose(fp))
log_sys_debug("fclose", path);
return r;
}
int module_present(struct cmd_context *cmd, const char *target_name)
{
int ret = 0;
#ifdef MODPROBE_CMD
char module[128];
const char *argv[] = { MODPROBE_CMD, module, NULL };
unsigned maj, min;
#endif
struct stat st;
char path[PATH_MAX];
int i = dm_snprintf(path, sizeof(path), "%smodule/dm_%s",
dm_sysfs_dir(), target_name);
if (i > 0) {
while ((i > 0) && path[--i] != '/') /* stop on dm_ */
if (path[i] == '-')
path[i] = '_'; /* replace '-' with '_' */
if ((lstat(path, &st) == 0) && S_ISDIR(st.st_mode)) {
log_debug_activation("Module directory %s exists.", path);
return 1;
}
if (path[i] == '/' && _check_modules_builtin(cmd, path + i + 1))
return 1;
}
#ifdef MODPROBE_CMD
if ((strcmp(target_name, TARGET_NAME_VDO) == 0) &&
(sscanf(cmd->kernel_vsn, "%u.%u", &maj, &min) == 2) &&
((maj < 6) || ((maj == 6) && (min < 9))))
argv[1] = MODULE_NAME_VDO; /* Kernels < 6.9 -> "kvdo" without dm- prefix */
else if (dm_snprintf(module, sizeof(module), "dm-%s", target_name) < 0) {
log_error("module_present module name too long: %s",
target_name);
return 0;
}
ret = exec_cmd(cmd, argv, NULL, 0);
#endif
return ret;
}
int target_present_version(struct cmd_context *cmd, const char *target_name,
int use_modprobe,
uint32_t *maj, uint32_t *min, uint32_t *patchlevel)
{
if (!activation()) {
log_error(INTERNAL_ERROR "Target present version called when activation is disabled.");
return 0;
}
#ifdef MODPROBE_CMD
if (use_modprobe) {
if (target_version(target_name, maj, min, patchlevel))
return 1;
if (!module_present(cmd, target_name))
return_0;
}
#endif
return target_version(target_name, maj, min, patchlevel);
}
int target_present(struct cmd_context *cmd, const char *target_name,
int use_modprobe)
{
uint32_t maj, min, patchlevel;
return target_present_version(cmd, target_name, use_modprobe,
&maj, &min, &patchlevel);
}
int get_device_list(const struct volume_group *vg, struct dm_list **devs,
unsigned *devs_features)
{
if (!activation())
return 0;
return dev_manager_get_device_list(NULL, devs, devs_features);
}
/*
* When '*info' is NULL, returns 1 only when LV is active.
* When '*info' != NULL, returns 1 when info structure is populated.
*/
static int _lv_info(struct cmd_context *cmd, const struct logical_volume *lv,
int use_layer, struct lvinfo *info,
const struct lv_segment *seg,
struct lv_seg_status *seg_status,
int with_open_count, int with_read_ahead, int with_name_check)
{
struct dm_info dminfo;
/*
* If open_count info is requested and we have to be sure our own udev
* transactions are finished
* For non-clustered locking type we are only interested for non-delete operation
* in progress - as only those could lead to opened files
*/
if (with_open_count) {
if (fs_has_non_delete_ops())
fs_unlock(); /* For non clustered - wait if there are non-delete ops */
}
/* New thin-pool has no layer, but -tpool suffix needs to be queried */
if (!use_layer && lv_is_new_thin_pool(lv)) {
/* Check if there isn't existing old thin pool mapping in the table */
if (!dev_manager_info(cmd, lv, NULL, 0, 0, 0, &dminfo, NULL, NULL))
return_0;
if (!dminfo.exists)
use_layer = 1;
}
if (seg_status) {
/* TODO: for now it's mess with seg_status */
seg_status->seg = seg;
}
if (!dev_manager_info(cmd, lv,
(use_layer) ? lv_layer(lv) : NULL,
with_open_count, with_read_ahead, with_name_check,
&dminfo,
(info) ? &info->read_ahead : NULL,
seg_status))
return_0;
if (!info)
return dminfo.exists;
info->exists = dminfo.exists;
info->suspended = dminfo.suspended;
info->open_count = dminfo.open_count;
info->major = dminfo.major;
info->minor = dminfo.minor;
info->read_only = dminfo.read_only;
info->live_table = dminfo.live_table;
info->inactive_table = dminfo.inactive_table;
return 1;
}
/*
* Returns 1 if info structure populated, else 0 on failure.
* When lvinfo* is NULL, it returns 1 if the device is locally active, 0 otherwise.
*/
int lv_info(struct cmd_context *cmd, const struct logical_volume *lv, int use_layer,
struct lvinfo *info, int with_open_count, int with_read_ahead)
{
if (!activation())
return 0;
return _lv_info(cmd, lv, use_layer, info, NULL, NULL, with_open_count, with_read_ahead, 0);
}
int lv_info_with_name_check(struct cmd_context *cmd, const struct logical_volume *lv,
int use_layer, struct lvinfo *info)
{
if (!activation())
return 0;
return _lv_info(cmd, lv, use_layer, info, NULL, NULL, 0, 0, 1);
}
/*
* Returns 1 if lv_with_info_and_seg_status info structure populated,
* else 0 on failure or if device not active locally.
*
* When seg_status parsing had troubles it will set type to SEG_STATUS_UNKNOWN.
*
* Using usually one ioctl to obtain info and status.
* More complex segment do collect info from one device,
* but status from another device.
*
* TODO: further improve with more statuses (i.e. snapshot's origin/merge)
*/
int lv_info_with_seg_status(struct cmd_context *cmd,
const struct lv_segment *lv_seg,
struct lv_with_info_and_seg_status *status,
int with_open_count, int with_read_ahead)
{
const struct logical_volume *olv, *lv = status->lv = lv_seg->lv;
if (!activation())
return 0;
if (lv_is_used_cache_pool(lv)) {
/* INFO is not set as cache-pool cannot be active.
* STATUS is collected from cache LV */
if (!(lv_seg = get_only_segment_using_this_lv(lv)))
return_0;
(void) _lv_info(cmd, lv_seg->lv, 1, NULL, lv_seg, &status->seg_status, 0, 0, 0);
return 1;
}
if (lv_is_thin_pool(lv)) {
/* Always collect status for '-tpool' */
if (_lv_info(cmd, lv, 1, &status->info, lv_seg, &status->seg_status, 0, 0, 0) &&
(status->seg_status.type == SEG_STATUS_THIN_POOL)) {
/* There is -tpool device, but query 'active' state of 'fake' thin-pool */
if (!_lv_info(cmd, lv, 0, NULL, NULL, NULL, 0, 0, 0) &&
!status->seg_status.thin_pool->needs_check)
status->info.exists = 0; /* So pool LV is not active */
}
return 1;
}
if (lv_is_external_origin(lv)) {
if (!_lv_info(cmd, lv, 0, &status->info, NULL, NULL,
with_open_count, with_read_ahead, 0))
return_0;
(void) _lv_info(cmd, lv, 1, NULL, lv_seg, &status->seg_status, 0, 0, 0);
return 1;
}
if (lv_is_origin(lv)) {
/* Query segment status for 'layered' (-real) device most of the time,
* only for merging snapshot, query its progress.
* TODO: single LV may need couple status to be exposed at once....
* but this needs more logical background
*/
/* Show INFO for actual origin and grab status for merging origin */
if (!_lv_info(cmd, lv, 0, &status->info, lv_seg,
lv_is_merging_origin(lv) ? &status->seg_status : NULL,
with_open_count, with_read_ahead, 0))
return_0;
if (status->info.exists &&
(status->seg_status.type != SEG_STATUS_SNAPSHOT)) /* Not merging */
/* Grab STATUS from layered -real */
(void) _lv_info(cmd, lv, 1, NULL, lv_seg, &status->seg_status, 0, 0, 0);
return 1;
}
if (lv_is_cow(lv)) {
if (lv_is_merging_cow(lv)) {
olv = origin_from_cow(lv);
if (!_lv_info(cmd, olv, 0, &status->info, first_seg(olv), &status->seg_status,
with_open_count, with_read_ahead, 0))
return_0;
if (status->seg_status.type == SEG_STATUS_SNAPSHOT ||
(lv_is_thin_volume(olv) && (status->seg_status.type == SEG_STATUS_THIN))) {
log_debug_activation("Snapshot merge is in progress, querying status of %s instead.",
display_lvname(lv));
/*
* When merge is in progress, query merging origin LV instead.
* COW volume is already mapped as error target in this case.
*/
return 1;
}
/* Merge not yet started, still a snapshot... */
}
/* Hadle fictional lvm2 snapshot and query snapshotX volume */
lv_seg = find_snapshot(lv);
}
if (lv_is_vdo(lv)) {
if (!_lv_info(cmd, lv, 0, &status->info, NULL, NULL,
with_open_count, with_read_ahead, 0))
return_0;
if (status->info.exists) {
/* Status for VDO pool */
(void) _lv_info(cmd, seg_lv(lv_seg, 0), 1, NULL,
first_seg(seg_lv(lv_seg, 0)),
&status->seg_status, 0, 0, 0);
/* Use VDO pool segtype result for VDO segtype */
status->seg_status.seg = lv_seg;
}
return 1;
}
if (lv_is_vdo_pool(lv)) {
/* Always collect status for '-vpool' */
if (_lv_info(cmd, lv, 1, &status->info, lv_seg, &status->seg_status, 0, 0, 0) &&
(status->seg_status.type == SEG_STATUS_VDO_POOL)) {
/* There is -tpool device, but query 'active' state of 'fake' vdo-pool */
if (!_lv_info(cmd, lv, 0, NULL, NULL, NULL, 0, 0, 0))
status->info.exists = 0; /* So VDO pool LV is not active */
}
return 1;
}
return _lv_info(cmd, lv, 0, &status->info, lv_seg, &status->seg_status,
with_open_count, with_read_ahead, 0);
}
#define OPEN_COUNT_CHECK_RETRIES 25
#define OPEN_COUNT_CHECK_USLEEP_DELAY 200000
/* Only report error if error_if_used is set */
/* Returns 0 if in use, 1 if it is unused, 2 when it is not present in table */
int lv_check_not_in_use(const struct logical_volume *lv, int error_if_used)
{
struct lvinfo info;
unsigned int open_count_check_retries;
if (!lv_info(lv->vg->cmd, lv, 0, &info, 1, 0) || !info.exists)
return 2;
else if (!info.open_count)
return 1;
/* If sysfs is not used, use open_count information only. */
if (dm_sysfs_dir()) {
if (dm_device_has_holders(info.major, info.minor)) {
if (error_if_used)
log_error("Logical volume %s is used by another device.",
display_lvname(lv));
else
log_debug_activation("Logical volume %s is used by another device.",
display_lvname(lv));
return 0;
}
if (dm_device_has_mounted_fs(info.major, info.minor)) {
if (error_if_used)
log_error("Logical volume %s contains a filesystem in use.",
display_lvname(lv));
else
log_debug_activation("Logical volume %s contains a filesystem in use.",
display_lvname(lv));
return 0;
}
}
open_count_check_retries = retry_deactivation() ? OPEN_COUNT_CHECK_RETRIES : 1;
while (open_count_check_retries--) {
if (interruptible_usleep(OPEN_COUNT_CHECK_USLEEP_DELAY))
break; /* interrupted */
log_debug_activation("Retrying open_count check for %s.",
display_lvname(lv));
if (!lv_info(lv->vg->cmd, lv, 0, &info, 1, 0) || !info.exists) {
stack; /* device dissappeared? */
return 1;
} else if (!info.open_count)
return 1;
}
if (error_if_used)
log_error("Logical volume %s in use.", display_lvname(lv));
else
log_debug_activation("Logical volume %s in use.", display_lvname(lv));
return 0;
}
/*
* Returns 1 if percent set, else 0 on failure.
*/
int lv_check_transient(struct logical_volume *lv)
{
int r;
struct dev_manager *dm;
if (!activation())
return 0;
log_debug_activation("Checking transient status for LV %s.",
display_lvname(lv));
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
if (!(r = dev_manager_transient(dm, lv)))
stack;
dev_manager_destroy(dm);
return r;
}
/*
* Returns 1 if percent set, else 0 on failure.
*/
int lv_snapshot_percent(const struct logical_volume *lv, dm_percent_t *percent)
{
int r;
struct dev_manager *dm;
if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0))
return 0;
log_debug_activation("Checking snapshot percent for LV %s.",
display_lvname(lv));
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
if (!(r = dev_manager_snapshot_percent(dm, lv, percent)))
stack;
dev_manager_destroy(dm);
return r;
}
/* FIXME Merge with snapshot_percent */
int lv_mirror_percent(struct cmd_context *cmd, const struct logical_volume *lv,
int wait, dm_percent_t *percent, uint32_t *event_nr)
{
int r;
struct dev_manager *dm;
/* If mirrored LV is temporarily shrinked to 1 area (= linear),
* it should be considered in-sync. */
if (dm_list_size(&lv->segments) == 1 && first_seg(lv)->area_count == 1) {
*percent = DM_PERCENT_100;
return 1;
}
if (!lv_info(cmd, lv, 0, NULL, 0, 0))
return 0;
log_debug_activation("Checking mirror percent for LV %s.",
display_lvname(lv));
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
if (!(r = dev_manager_mirror_percent(dm, lv, wait, percent, event_nr)))
stack;
dev_manager_destroy(dm);
return r;
}
int lv_raid_percent(const struct logical_volume *lv, dm_percent_t *percent)
{
return lv_mirror_percent(lv->vg->cmd, lv, 0, percent, NULL);
}
int lv_raid_data_offset(const struct logical_volume *lv, uint64_t *data_offset)
{
struct lv_status_raid *raid_status;
if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0))
return 0;
log_debug_activation("Checking raid data offset and dev sectors for LV %s/%s",
lv->vg->name, lv->name);
if (!lv_raid_status(lv, &raid_status))
return_0;
*data_offset = raid_status->raid->data_offset;
dm_pool_destroy(raid_status->mem);
return 1;
}
int lv_raid_dev_health(const struct logical_volume *lv, char **dev_health)
{
int r = 1;
struct lv_status_raid *raid_status;
*dev_health = NULL;
if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0))
return 0;
log_debug_activation("Checking raid device health for LV %s.",
display_lvname(lv));
if (!lv_raid_status(lv, &raid_status))
return_0;
if (!(*dev_health = dm_pool_strdup(lv->vg->cmd->mem,
raid_status->raid->dev_health))) {
stack;
r = 0;
}
dm_pool_destroy(raid_status->mem);
return r;
}
int lv_raid_dev_count(const struct logical_volume *lv, uint32_t *dev_cnt)
{
struct lv_status_raid *raid_status;
*dev_cnt = 0;
if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0))
return 0;
log_debug_activation("Checking raid device count for LV %s/%s",
lv->vg->name, lv->name);
if (!lv_raid_status(lv, &raid_status))
return_0;
*dev_cnt = raid_status->raid->dev_count;
dm_pool_destroy(raid_status->mem);
return 1;
}
int lv_raid_mismatch_count(const struct logical_volume *lv, uint64_t *cnt)
{
struct lv_status_raid *raid_status;
*cnt = 0;
if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0))
return 0;
log_debug_activation("Checking raid mismatch count for LV %s.",
display_lvname(lv));
if (!lv_raid_status(lv, &raid_status))
return_0;
*cnt = raid_status->raid->mismatch_count;
dm_pool_destroy(raid_status->mem);
return 1;
}
int lv_raid_sync_action(const struct logical_volume *lv, char **sync_action)
{
struct lv_status_raid *raid_status;
int r = 1;
*sync_action = NULL;
if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0))
return 0;
log_debug_activation("Checking raid sync_action for LV %s.",
display_lvname(lv));
if (!lv_raid_status(lv, &raid_status))
return_0;
/* status->sync_action can be NULL if dm-raid version < 1.5.0 */
if (!raid_status->raid->sync_action ||
!(*sync_action = dm_pool_strdup(lv->vg->cmd->mem,
raid_status->raid->sync_action))) {
stack;
r = 0;
}
dm_pool_destroy(raid_status->mem);
return r;
}
int lv_raid_message(const struct logical_volume *lv, const char *msg)
{
struct lv_status_raid *raid_status;
struct dev_manager *dm = NULL;
int r = 0;
if (!seg_is_raid(first_seg(lv))) {
/*
* Make it easier for user to know what to do when
* they are using thinpool.
*/
if (lv_is_thin_pool(lv) &&
(lv_is_raid(seg_lv(first_seg(lv), 0)) ||
lv_is_raid(first_seg(lv)->metadata_lv))) {
log_error("Thin pool data or metadata volume "
"must be specified. (E.g. \"%s_tdata\")",
display_lvname(lv));
return 0;
}
log_error("%s must be a RAID logical volume to perform this action.",
display_lvname(lv));
return 0;
}
if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0)) {
log_error("Unable to send message to an inactive logical volume.");
return 0;
}
if (!lv_raid_status(lv, &raid_status))
return_0;
if (!raid_status->raid->sync_action) {
log_error("Kernel driver does not support this action: %s", msg);
goto out;
}
/*
* Note that 'dev_manager_raid_message' allows us to pass down any
* currently valid message. However, this function restricts the
* number of user available combinations to a minimum. Specifically,
* "idle" -> "check"
* "idle" -> "repair"
* (The state automatically switches to "idle" when a sync process is
* complete.)
*/
if (strcmp(msg, "check") && strcmp(msg, "repair")) {
/*
* MD allows "frozen" to operate in a toggling fashion.
* We could allow this if we like...
*/
log_error("\"%s\" is not a supported sync operation.", msg);
goto out;
}
if (strcmp(raid_status->raid->sync_action, "idle")) {
log_error("%s state is currently \"%s\". Unable to switch to \"%s\".",
display_lvname(lv), raid_status->raid->sync_action, msg);
goto out;
}
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
r = dev_manager_raid_message(dm, lv, msg);
out:
if (dm)
dev_manager_destroy(dm);
dm_pool_destroy(raid_status->mem);
return r;
}
int lv_raid_status(const struct logical_volume *lv, struct lv_status_raid **status)
{
struct dev_manager *dm;
int exists;
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
if (!dev_manager_raid_status(dm, lv, status, &exists)) {
dev_manager_destroy(dm);
if (exists)
stack;
return 0;
}
/* User has to call dm_pool_destroy(status->mem)! */
return 1;
}
int lv_writecache_message(const struct logical_volume *lv, const char *msg)
{
int r = 0;
struct dev_manager *dm;
if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0)) {
log_error("Unable to send message to an inactive logical volume.");
return 0;
}
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
r = dev_manager_writecache_message(dm, lv, msg);
dev_manager_destroy(dm);
return r;
}
/*
* Return dm_status_cache for cache volume, accept also cache pool
*
* As there are too many variable for cache volumes, and it hard
* to make good API - so let's obtain dm_status_cache and return
* all info we have - user just has to release struct after its use.
*/
int lv_cache_status(const struct logical_volume *cache_lv,
struct lv_status_cache **status)
{
struct dev_manager *dm;
struct lv_segment *cache_seg;
int exists;
if (lv_is_cache_pool(cache_lv)) {
if (dm_list_empty(&cache_lv->segs_using_this_lv) ||
!(cache_seg = get_only_segment_using_this_lv(cache_lv))) {
log_error(INTERNAL_ERROR "Cannot check status for unused cache pool %s.",
display_lvname(cache_lv));
return 0;
}
cache_lv = cache_seg->lv;
}
if (lv_is_pending_delete(cache_lv)) {
log_error("Cannot check status for deleted cache volume %s.",
display_lvname(cache_lv));
return 0;
}
if (!(dm = dev_manager_create(cache_lv->vg->cmd, cache_lv->vg->name, 1)))
return_0;
if (!dev_manager_cache_status(dm, cache_lv, status, &exists)) {
dev_manager_destroy(dm);
if (exists)
stack;
return 0;
}
/* User has to call dm_pool_destroy(status->mem)! */
return 1;
}
int lv_thin_pool_status(const struct logical_volume *lv, int flush,
struct lv_status_thin_pool **thin_pool_status)
{
struct dev_manager *dm;
int exists;
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
if (!dev_manager_thin_pool_status(dm, lv, flush, thin_pool_status, &exists)) {
dev_manager_destroy(dm);
if (exists)
stack;
return 0;
}
/* User has to call dm_pool_destroy(thin_pool_status->mem)! */
return 1;
}
int lv_thin_status(const struct logical_volume *lv, int flush,
struct lv_status_thin **thin_status)
{
struct dev_manager *dm;
int exists;
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
if (!dev_manager_thin_status(dm, lv, flush, thin_status, &exists)) {
dev_manager_destroy(dm);
if (exists)
stack;
return 0;
}
/* User has to call dm_pool_destroy(thin_status->mem)! */
return 1;
}
int lv_thin_device_id(const struct logical_volume *lv, uint32_t *device_id)
{
struct dev_manager *dm;
int exists;
int r;
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
if (!(r = dev_manager_thin_device_id(dm, lv, device_id, &exists)))
if (exists)
stack;
dev_manager_destroy(dm);
return r;
}
/*
* lv_vdo_pool_status obtains status information about VDO pool
*
* If the 'params' string has been already retrieved, use it.
* If the mempool already exists, use it.
*
*/
int lv_vdo_pool_status(const struct logical_volume *lv, int flush,
struct lv_status_vdo **vdo_status)
{
struct dev_manager *dm;
int exists;
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, !lv_is_pvmove(lv))))
return_0;
if (!dev_manager_vdo_pool_status(dm, lv, flush, vdo_status, &exists)) {
dev_manager_destroy(dm);
if (exists)
stack;
return 0;
}
/* User has to call dm_pool_destroy(vdo_status->mem) */
return 1;
}
int lv_vdo_pool_percent(const struct logical_volume *lv, dm_percent_t *percent)
{
struct lv_status_vdo *vdo_status;
if (!lv_vdo_pool_status(lv, 0, &vdo_status))
return_0;
*percent = vdo_status->usage;
dm_pool_destroy(vdo_status->mem);
return 1;
}
/*
* lv_vdo_pool_size_config obtains size configuration from active VDO table line
*
* If the 'params' string has been already retrieved, use it.
* If the mempool already exists, use it.
*
*/
int lv_vdo_pool_size_config(const struct logical_volume *lv,
struct vdo_pool_size_config *cfg)
{
struct dev_manager *dm;
int r;
if (!lv_info(lv->vg->cmd, lv, 1, NULL, 0, 0))
return 1; /* Inactive VDO pool -> no runtime config */
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, !lv_is_pvmove(lv))))
return_0;
r = dev_manager_vdo_pool_size_config(dm, lv, cfg);
dev_manager_destroy(dm);
return r;
}
static int _lv_active(struct cmd_context *cmd, const struct logical_volume *lv)
{
struct lvinfo info;
if (!lv_info(cmd, lv, 0, &info, 0, 0)) {
log_debug_activation("Cannot determine activation status of %s%s.",
display_lvname(lv),
activation() ? "" : " (no device driver)");
return 0;
}
return info.exists;
}
static int _lv_open_count(struct cmd_context *cmd, const struct logical_volume *lv)
{
struct lvinfo info;
if (!lv_info(cmd, lv, 0, &info, 1, 0)) {
stack;
return -1;
}
return info.open_count;
}
static int _lv_activate_lv(const struct logical_volume *lv, struct lv_activate_opts *laopts)
{
int r;
struct dev_manager *dm;
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, !lv_is_pvmove(lv))))
return_0;
if (!(r = dev_manager_activate(dm, lv, laopts)))
stack;
dev_manager_destroy(dm);
return r;
}
static int _lv_preload(const struct logical_volume *lv, struct lv_activate_opts *laopts,
int *flush_required)
{
int r = 0;
struct dev_manager *dm;
int old_readonly = laopts->read_only;
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, !lv_is_pvmove(lv))))
goto_out;
laopts->read_only = _passes_readonly_filter(lv->vg->cmd, lv);
if (!(r = dev_manager_preload(dm, lv, laopts, flush_required)))
stack;
dev_manager_destroy(dm);
laopts->read_only = old_readonly;
out:
return r;
}
static int _lv_deactivate(const struct logical_volume *lv)
{
int r;
struct dev_manager *dm;
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
return_0;
if (!(r = dev_manager_deactivate(dm, lv)))
stack;
dev_manager_destroy(dm);
return r;
}
static int _lv_suspend_lv(const struct logical_volume *lv, struct lv_activate_opts *laopts,
int lockfs, int flush_required)
{
int r;
struct dev_manager *dm;
laopts->read_only = _passes_readonly_filter(lv->vg->cmd, lv);
/*
* When we are asked to manipulate (normally suspend/resume) the PVMOVE
* device directly, we don't want to touch the devices that use it.
*/
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, !lv_is_pvmove(lv))))
return_0;
if (!(r = dev_manager_suspend(dm, lv, laopts, lockfs, flush_required)))
stack;
dev_manager_destroy(dm);
return r;
}
/*
* These two functions return the number of visible LVs in the state,
* or -1 on error. FIXME Check this.
*/
int lvs_in_vg_activated(const struct volume_group *vg)
{
struct lv_list *lvl;
int count = 0;
if (!activation())
return 0;
dm_list_iterate_items(lvl, &vg->lvs)
if (lv_is_visible(lvl->lv))
count += (_lv_active(vg->cmd, lvl->lv) == 1);
log_debug_activation("Counted %d active LVs in VG %s", count, vg->name);
return count;
}
int lvs_in_vg_opened(const struct volume_group *vg)
{
const struct lv_list *lvl;
int count = 0;
if (!activation())
return 0;
dm_list_iterate_items(lvl, &vg->lvs)
if (lv_is_visible(lvl->lv))
count += (_lv_open_count(vg->cmd, lvl->lv) > 0);
log_debug_activation("Counted %d open LVs in VG %s.", count, vg->name);
return count;
}
/*
* Check if "raid4" @segtype is supported by kernel.
*
* if segment type is not raid4, return 1.
*/
int raid4_is_supported(struct cmd_context *cmd, const struct segment_type *segtype)
{
unsigned attrs = 0;
if (segtype_is_raid4(segtype) &&
(!segtype->ops->target_present ||
!segtype->ops->target_present(cmd, NULL, &attrs) ||
!(attrs & RAID_FEATURE_RAID4))) {
log_error("RAID module does not support RAID4.");
return 0;
}
return 1;
}
/*
* The VG lock must be held to call this function.
*
* Returns: 0 or 1
*/
int lv_is_active(const struct logical_volume *lv)
{
return _lv_active(lv->vg->cmd, lv);
}
#ifdef DMEVENTD
static struct dm_event_handler *_create_dm_event_handler(struct cmd_context *cmd, const char *dmuuid, const char *dso,
const int timeout, enum dm_event_mask mask)
{
struct dm_event_handler *dmevh;
if (!(dmevh = dm_event_handler_create()))
return_NULL;
if (!cmd->default_settings.dmeventd_executable)
cmd->default_settings.dmeventd_executable = find_config_tree_str(cmd, dmeventd_executable_CFG, NULL);
if (dm_event_handler_set_dmeventd_path(dmevh, cmd->default_settings.dmeventd_executable))
goto_bad;
if (dso && dm_event_handler_set_dso(dmevh, dso))
goto_bad;
if (dm_event_handler_set_uuid(dmevh, dmuuid))
goto_bad;
dm_event_handler_set_timeout(dmevh, timeout);
dm_event_handler_set_event_mask(dmevh, mask);
return dmevh;
bad:
dm_event_handler_destroy(dmevh);
return NULL;
}
char *get_monitor_dso_path(struct cmd_context *cmd, int id)
{
const char *libpath = find_config_tree_str(cmd, id, NULL);
char path[PATH_MAX];
get_shared_library_path(cmd, libpath, path, sizeof(path));
return strdup(path);
}
static char *_build_target_uuid(struct cmd_context *cmd, const struct logical_volume *lv)
{
return build_dm_uuid(cmd->mem, lv, lv_layer(lv));
}
static int _device_registered_with_dmeventd(struct cmd_context *cmd,
const struct logical_volume *lv,
const char **dso,
int *pending, int *monitored)
{
char *uuid;
enum dm_event_mask evmask;
struct dm_event_handler *dmevh;
int r;
*pending = 0;
*monitored = 0;
if (!(uuid = _build_target_uuid(cmd, lv)))
return_0;
if (!(dmevh = _create_dm_event_handler(cmd, uuid, NULL, 0, DM_EVENT_ALL_ERRORS)))
return_0;
if ((r = dm_event_get_registered_device(dmevh, 0))) {
if (r == -ENOENT) {
r = 1;
goto out;
}
r = 0;
goto_out;
}
/* FIXME: why do we care which 'dso' is monitoring? */
if (dso && (*dso = dm_event_handler_get_dso(dmevh)) &&
!(*dso = dm_pool_strdup(cmd->mem, *dso))) {
r = 0;
goto_out;
}
evmask = dm_event_handler_get_event_mask(dmevh);
if (evmask & DM_EVENT_REGISTRATION_PENDING) {
*pending = 1;
evmask &= ~DM_EVENT_REGISTRATION_PENDING;
}
*monitored = evmask;
r = 1;
out:
dm_event_handler_destroy(dmevh);
return r;
}
int target_registered_with_dmeventd(struct cmd_context *cmd, const char *dso,
const struct logical_volume *lv,
int *pending, int *monitored)
{
char *uuid;
enum dm_event_mask evmask;
struct dm_event_handler *dmevh;
int r;
*pending = 0;
*monitored = 0;
if (!dso)
return_0;
if (!(uuid = _build_target_uuid(cmd, lv)))
return_0;
if (!(dmevh = _create_dm_event_handler(cmd, uuid, dso, 0, DM_EVENT_ALL_ERRORS)))
return_0;
if ((r = dm_event_get_registered_device(dmevh, 0))) {
if (r == -ENOENT) {
r = 1;
goto out;
}
r = 0;
goto_out;
}
evmask = dm_event_handler_get_event_mask(dmevh);
if (evmask & DM_EVENT_REGISTRATION_PENDING) {
*pending = 1;
evmask &= ~DM_EVENT_REGISTRATION_PENDING;
}
*monitored = evmask;
r = 1;
out:
dm_event_handler_destroy(dmevh);
return r;
}
int target_register_events(struct cmd_context *cmd, const char *dso, const struct logical_volume *lv,
int evmask __attribute__((unused)), int set, int timeout)
{
char *uuid;
struct dm_event_handler *dmevh;
int r;
if (!dso)
return_0;
/* We always monitor the "real" device, never the "snapshot-origin" itself. */
if (!(uuid = _build_target_uuid(cmd, lv)))
return_0;
if (!(dmevh = _create_dm_event_handler(cmd, uuid, dso, timeout,
DM_EVENT_ALL_ERRORS | (timeout ? DM_EVENT_TIMEOUT : 0))))
return_0;
r = set ? dm_event_register_handler(dmevh) : dm_event_unregister_handler(dmevh);
dm_event_handler_destroy(dmevh);
if (!r)
return_0;
log_verbose("%s %s for events", set ? "Monitored" : "Unmonitored", uuid);
return 1;
}
#endif
/*
* Returns 0 if an attempt to (un)monitor the device failed.
* Returns 1 otherwise.
*/
int monitor_dev_for_events(struct cmd_context *cmd, const struct logical_volume *lv,
const struct lv_activate_opts *laopts, int monitor)
{
#ifdef DMEVENTD
int i, pending = 0, monitored = 0;
int r = 1;
struct dm_list *snh, *snht;
struct lv_segment *seg;
struct lv_segment *log_seg;
int (*monitor_fn) (struct lv_segment *s, int e);
uint32_t s;
const struct lv_activate_opts zlaopts = { 0 };
struct lv_activate_opts mirr_laopts = { .origin_only = 1 };
struct lvinfo info;
const char *dso = NULL;
int new_unmonitor;
if (!laopts)
laopts = &zlaopts;
else
mirr_laopts.read_only = laopts->read_only;
/* skip dmeventd code altogether */
if (dmeventd_monitor_mode() == DMEVENTD_MONITOR_IGNORE)
return 1;
/*
* Nothing to do if dmeventd configured not to be used.
*/
if (monitor && !dmeventd_monitor_mode())
return 1;
if (sigint_caught())
return_0;
/*
* Activation of unused cache-pool activates metadata device as
* a public LV for clearing purpose.
* FIXME:
* As VG lock is held across whole operation unmonitored volume
* is usually OK since dmeventd couldn't do anything.
* However in case command would have crashed, such LV is
* left unmonitored and may potentially require dmeventd.
*/
if (lv_is_cache_pool_data(lv) || lv_is_cache_pool_metadata(lv)) {
if (!(seg = find_pool_seg(first_seg(lv))))
return_0;
if (!lv_is_used_cache_pool(seg->lv)) {
log_debug_activation("Skipping %smonitor of %s.%s",
(monitor) ? "" : "un", display_lvname(lv),
(monitor) ? " Cache pool activation for clearing only." : "");
return 1;
}
}
/*
* Allow to unmonitor thin pool via explicit pool unmonitor
* or unmonitor before the last thin pool user deactivation
* Skip unmonitor, if invoked via deactivation of thin volume
* and there is another thin pool user (open_count > 1)
* FIXME think about watch ruler influence.
*/
if (laopts->skip_in_use && lv_is_thin_pool(lv) &&
lv_info(lv->vg->cmd, lv, 1, &info, 1, 0) && (info.open_count > 1)) {
log_debug_activation("Skipping unmonitor of opened %s (open:%d)",
display_lvname(lv), info.open_count);
return 1;
}
/* Do not monitor snapshot that already covers origin */
if (monitor && lv_is_cow_covering_origin(lv)) {
log_debug_activation("Skipping monitor of snapshot larger "
"then origin %s.", display_lvname(lv));
return 1;
}
/*
* In case of a snapshot device, we monitor lv->snapshot->lv,
* not the actual LV itself.
*/
if (lv_is_cow(lv) && (laopts->no_merging || !lv_is_merging_cow(lv) ||
lv_has_target_type(lv->vg->cmd->mem, lv, NULL, TARGET_NAME_SNAPSHOT))) {
if (!(r = monitor_dev_for_events(cmd, lv->snapshot->lv, NULL, monitor)))
stack;
return r;
}
/*
* In case this LV is a snapshot origin, we instead monitor
* each of its respective snapshots. The origin itself may
* also need to be monitored if it is a mirror, for example,
* so fall through to process it afterwards.
* Before monitoring snapshots verify origin is active as with
* external origin only read-only -real device can be active.
*/
if (!laopts->origin_only && lv_is_origin(lv) && lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0))
dm_list_iterate_safe(snh, snht, &lv->snapshot_segs)
if (!monitor_dev_for_events(cmd, dm_list_struct_base(snh,
struct lv_segment, origin_list)->cow, NULL, monitor)) {
stack;
r = 0;
}
/*
* If the volume is mirrored and its log is also mirrored, monitor
* the log volume as well.
*/
if ((seg = first_seg(lv)) != NULL && seg->log_lv != NULL &&
(log_seg = first_seg(seg->log_lv)) != NULL &&
seg_is_mirrored(log_seg))
if (!monitor_dev_for_events(cmd, seg->log_lv, NULL, monitor)) {
stack;
r = 0;
}
dm_list_iterate_items(seg, &lv->segments) {
if (sigint_caught()) {
stack;
r = 0;
break;
}
/* Recurse for AREA_LV */
for (s = 0; s < seg->area_count; s++) {
if (seg_type(seg, s) != AREA_LV)
continue;
if (!monitor_dev_for_events(cmd, seg_lv(seg, s), NULL,
monitor)) {
stack;
r = 0;
}
}
/*
* If requested unmonitoring of thin volume, preserve skip_in_use flag.
*
* FIXME: code here looks like _lv_postorder()
*/
if (seg->pool_lv &&
!monitor_dev_for_events(cmd, seg->pool_lv,
(!monitor) ? laopts : NULL, monitor)) {
stack;
r = 0;
}
if (seg->external_lv &&
!monitor_dev_for_events(cmd, seg->external_lv,
(!monitor) ? laopts : NULL, monitor)) {
stack;
r = 0;
}
if (seg->metadata_lv &&
!monitor_dev_for_events(cmd, seg->metadata_lv, NULL, monitor)) {
stack;
r = 0;
}
if (!seg_monitored(seg) ||
(seg->status & PVMOVE) ||
!seg->segtype->ops->target_monitored) /* doesn't support registration */
continue;
if (!monitor) {
/* When unmonitoring, obtain existing dso being used. */
if (!_device_registered_with_dmeventd(cmd, seg_is_snapshot(seg) ? seg->cow : seg->lv,
&dso, &pending, &monitored)) {
log_warn("WARNING: Failed to %smonitor %s.",
monitor ? "" : "un",
display_lvname(seg_is_snapshot(seg) ? seg->cow : seg->lv));
return 0;
}
} else if (!seg->segtype->ops->target_monitored(seg, &pending, &monitored)) {
log_warn("WARNING: Failed to %smonitor %s.",
monitor ? "" : "un",
display_lvname(seg->lv));
return 0;
}
/* FIXME: We should really try again if pending */
monitored = (pending) ? 0 : monitored;
monitor_fn = NULL;
new_unmonitor = 0;
if (monitor) {
if (monitored)
log_verbose("%s already monitored.", display_lvname(lv));
else if (seg->segtype->ops->target_monitor_events) {
log_very_verbose("Monitoring %s with %s.%s", display_lvname(lv),
seg->segtype->dso,
test_mode() ? " [Test mode: skipping this]" : "");
monitor_fn = seg->segtype->ops->target_monitor_events;
}
} else {
if (!monitored)
log_verbose("%s already not monitored.", display_lvname(lv));
else if (dso && *dso) {
/*
* Divert unmonitor away from code that depends on the new segment
* type instead of the existing one if it's changing.
*/
log_verbose("Not monitoring %s with %s%s", display_lvname(lv), dso, test_mode() ? " [Test mode: skipping this]" : "");
new_unmonitor = 1;
}
}
/* FIXME Test mode should really continue a bit further. */
if (test_mode())
continue;
if (new_unmonitor) {
if (!target_register_events(cmd, dso, seg_is_snapshot(seg) ? seg->cow : lv, 0, 0, 10)) {
log_warn("WARNING: %s: segment unmonitoring failed.",
display_lvname(lv));
return 0;
}
} else if (monitor_fn) {
/* FIXME specify events */
if (!monitor_fn(seg, 0)) {
log_warn("WARNING: %s: %s segment monitoring function failed.",
display_lvname(lv), lvseg_name(seg));
return 0;
}
} else
continue;
if (!vg_write_lock_held() && lv_is_mirror(lv)) {
mirr_laopts.exclusive = lv_is_active(lv) ? 1 : 0;
/*
* Commands vgchange and lvchange do use read-only lock when changing
* monitoring (--monitor y|n). All other use cases hold 'write-lock'
* so they skip this dm mirror table refreshing step.
*/
if (!_lv_activate_lv(lv, &mirr_laopts)) {
stack;
r = 0;
}
}
/* Check [un]monitor results */
/* Try a couple times if pending, but not forever... */
for (i = 0;; i++) {
pending = 0;
if (!seg->segtype->ops->target_monitored(seg, &pending, &monitored)) {
stack;
r = 0;
break;
}
if (!pending || i >= 40)
break;
log_very_verbose("%s %smonitoring still pending: waiting...",
display_lvname(lv), monitor ? "" : "un");
if (interruptible_usleep(10000 * i)) {
stack;
r = 0;
break;
}
}
if (r)
r = (monitored && monitor) || (!monitored && !monitor);
}
if (!r && !error_message_produced())
log_warn("WARNING: %sonitoring %s failed.", monitor ? "M" : "Not m",
display_lvname(lv));
return r;
#else
return 1;
#endif
}
struct detached_lv_data {
const struct volume_group *vg_pre;
struct lv_activate_opts *laopts;
int *flush_required;
};
static int _preload_detached_lv(struct logical_volume *lv, void *data)
{
struct detached_lv_data *detached = data;
struct logical_volume *lv_pre;
/* Check if the LV was 'hidden' (non-toplevel) in committed metadata
* and becomes 'visible' (toplevel) in precommitted metadata */
if (!lv_is_visible(lv) &&
(lv_pre = find_lv_in_vg_by_lvid(detached->vg_pre, &lv->lvid)) &&
lv_is_visible(lv_pre)) {
log_debug_activation("Preloading detached hidden volume %s as visible volume %s.",
display_lvname(lv), display_lvname(lv_pre));
if (!_lv_preload(lv_pre, detached->laopts, detached->flush_required))
return_0;
}
return 1;
}
static int _lv_suspend(struct cmd_context *cmd, const char *lvid_s,
struct lv_activate_opts *laopts, int error_if_not_suspended,
const struct logical_volume *lv, const struct logical_volume *lv_pre)
{
const struct logical_volume *pvmove_lv = NULL;
struct logical_volume *lv_pre_tmp, *lv_tmp;
struct seg_list *sl;
struct lv_segment *snap_seg;
struct lvinfo info;
int r = 0, lockfs = 0, flush_required = 0;
struct detached_lv_data detached;
struct dm_pool *mem = NULL;
struct dm_list suspend_lvs;
struct lv_list *lvl;
int found;
if (!activation())
return 1;
if (test_mode()) {
_skip("Suspending %s%s.", display_lvname(lv),
laopts->origin_only ? " origin without snapshots" : "");
r = 1;
goto out;
}
if (!lv_info(cmd, lv, laopts->origin_only, &info, 0, 0))
goto_out;
if (!info.exists || info.suspended) {
if (!error_if_not_suspended) {
r = 1;
if (info.suspended)
critical_section_inc(cmd, "already suspended");
}
goto out;
}
lv_calculate_readahead(lv, NULL);
/* Ignore origin_only unless LV is origin in both old and new metadata */
/* or LV is thin or thin pool volume */
if (laopts->origin_only &&
!lv_is_thin_volume(lv) && !lv_is_thin_pool(lv) &&
!(lv_is_origin(lv) && lv_is_origin(lv_pre))) {
log_debug_activation("Not using origin only for suspend of %s.",
display_lvname(lv));
laopts->origin_only = 0;
}
/*
* Preload devices for the LV.
* If the PVMOVE LV is being removed, it's only present in the old
* metadata and not the new, so we must explicitly add the new
* tables for all the changed LVs here, as the relationships
* are not found by walking the new metadata.
*/
if (lv_is_locked(lv) && !lv_is_locked(lv_pre) &&
(pvmove_lv = find_pvmove_lv_in_lv(lv))) {
/* Preload all the LVs above the PVMOVE LV */
dm_list_iterate_items(sl, &pvmove_lv->segs_using_this_lv) {
if (!(lv_pre_tmp = find_lv(lv_pre->vg, sl->seg->lv->name))) {
log_error(INTERNAL_ERROR "LV %s missing from preload metadata.",
display_lvname(sl->seg->lv));
goto out;
}
if (!_lv_preload(lv_pre_tmp, laopts, &flush_required))
goto_out;
}
/* Now preload the PVMOVE LV itself */
if (!(lv_pre_tmp = find_lv(lv_pre->vg, pvmove_lv->name))) {
log_error(INTERNAL_ERROR "LV %s missing from preload metadata.",
display_lvname(pvmove_lv));
goto out;
}
if (!_lv_preload(lv_pre_tmp, laopts, &flush_required))
goto_out;
/* Suspending 1st. LV above PVMOVE suspends whole tree */
dm_list_iterate_items(sl, &pvmove_lv->segs_using_this_lv) {
lv = sl->seg->lv;
break;
}
} else {
if (!_lv_preload(lv_pre, laopts, &flush_required))
/* FIXME Revert preloading */
goto_out;
/*
* Search for existing LVs that have become detached and preload them.
*/
detached.vg_pre = lv_pre->vg;
detached.laopts = laopts;
detached.flush_required = &flush_required;
if (!for_each_sub_lv((struct logical_volume *)lv, &_preload_detached_lv, &detached))
goto_out;
/*
* Preload any snapshots that are being removed.
*/
if (!laopts->origin_only && lv_is_origin(lv)) {
dm_list_iterate_items_gen(snap_seg, &lv->snapshot_segs, origin_list) {
if (!(lv_pre_tmp = find_lv_in_vg_by_lvid(lv_pre->vg, &snap_seg->cow->lvid))) {
log_error(INTERNAL_ERROR "LV %s (%s) missing from preload metadata.",
display_lvname(snap_seg->cow),
snap_seg->cow->lvid.id[1].uuid);
goto out;
}
if (!lv_is_cow(lv_pre_tmp) &&
!_lv_preload(lv_pre_tmp, laopts, &flush_required))
goto_out;
}
}
}
/* Flush is ATM required for the tested cases
* NOTE: Mirror repair requires noflush for proper repair!
* TODO: Relax this limiting condition further */
if (!flush_required &&
(lv_is_pvmove(lv) || pvmove_lv ||
(!lv_is_mirror(lv) &&
!lv_is_thin_volume(lv) &&
!lv_is_thin_pool(lv) &&
!lv_is_vdo(lv) &&
!lv_is_vdo_pool(lv)))) {
log_debug_activation("Requiring flush for LV %s.", display_lvname(lv));
flush_required = 1;
}
if (!monitor_dev_for_events(cmd, lv, laopts, 0))
/* FIXME Consider aborting here */
stack;
/* Require fs synchronization when taking a thin snapshot */
if (laopts->origin_only && lv_is_thin_volume(lv) && lv_is_thin_volume(lv_pre))
lockfs = 1;
/* Require fs synchronization when taking a thick snapshot */
else if (!laopts->origin_only &&
(lv_is_origin(lv_pre) || lv_is_cow(lv_pre)))
lockfs = 1;
/* Require fs synchronization when converting a non-thin LV to a thin LV or
* a non/thin LV with/out external origin to a thin LV with external origin LV. */
else if (!laopts->origin_only &&
lv_is_thin_volume(lv_pre) && /* new LV is a Thin */
(!lv_is_thin_volume(lv) || /* and either the existing LV is NOT a Thin */
(first_seg(lv_pre)->external_lv && /* or the existing LV IS Thin and the new LV is Thin with the external origin */
(!first_seg(lv)->external_lv || /* and check if existing Thin is either without the external origin */
memcmp(&first_seg(lv_pre)->external_lv->lvid.id[1], /* or it uses a different external origin */
&first_seg(lv)->external_lv->lvid.id[1], ID_LEN) != 0))))
lockfs = 1;
if (!lv_is_locked(lv) && lv_is_locked(lv_pre) &&
(pvmove_lv = find_pvmove_lv_in_lv(lv_pre))) {
/*
* When starting PVMOVE, suspend participating LVs first
* with committed metadata by looking at precommited pvmove list.
* In committed metadata these LVs are not connected in any way.
*
* TODO: prepare list of LVs needed to be suspended and pass them
* via 'struct laopts' directly to _lv_suspend_lv() and handle this
* with a single 'dmtree' call.
*/
if (!(mem = dm_pool_create("suspend_lvs", 128)))
goto_out;
/* Prepare list of all LVs for suspend ahead */
dm_list_init(&suspend_lvs);
dm_list_iterate_items(sl, &pvmove_lv->segs_using_this_lv) {
lv_tmp = sl->seg->lv;
if (lv_is_cow(lv_tmp))
/* Never suspend COW, always has to be origin */
lv_tmp = origin_from_cow(lv_tmp);
found = 0;
dm_list_iterate_items(lvl, &suspend_lvs)
if (strcmp(lvl->lv->name, lv_tmp->name) == 0) {
found = 1;
break;
}
if (found)
continue; /* LV is already in the list */
if (!(lvl = dm_pool_alloc(mem, sizeof(*lvl)))) {
log_error("lv_list alloc failed.");
goto out;
}
/* Look for precommitted LV name in commmitted VG */
if (!(lvl->lv = find_lv(lv->vg, lv_tmp->name))) {
log_error(INTERNAL_ERROR "LV %s missing from preload metadata.",
display_lvname(lv_tmp));
goto out;
}
dm_list_add(&suspend_lvs, &lvl->list);
}
critical_section_inc(cmd, "suspending");
dm_list_iterate_items(lvl, &suspend_lvs)
if (!_lv_suspend_lv(lvl->lv, laopts, lockfs, 1)) {
critical_section_dec(cmd, "failed suspend");
goto_out; /* FIXME: resume on recovery path? */
}
} else { /* Standard suspend */
critical_section_inc(cmd, "suspending");
if (!_lv_suspend_lv(lv, laopts, lockfs, flush_required)) {
critical_section_dec(cmd, "failed suspend");
goto_out;
}
}
r = 1;
out:
if (mem)
dm_pool_destroy(mem);
return r;
}
/*
* In a cluster, set exclusive to indicate that only one node is using the
* device. Any preloaded tables may then use non-clustered targets.
*
* Returns success if the device is not active
*/
int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only, unsigned exclusive,
const struct logical_volume *lv, const struct logical_volume *lv_pre)
{
struct lv_activate_opts laopts = {
.exclusive = exclusive,
.origin_only = origin_only
};
return _lv_suspend(cmd, lvid_s, &laopts, 0, lv, lv_pre);
}
static int _check_suspended_lv(struct logical_volume *lv, void *data)
{
struct lvinfo info;
if (lv_info(lv->vg->cmd, lv, 0, &info, 0, 0) && info.exists && info.suspended) {
log_debug_activation("Found suspended LV %s in critical section().", display_lvname(lv));
return 0; /* There is suspended subLV in the tree */
}
if (lv_layer(lv) && lv_info(lv->vg->cmd, lv, 1, &info, 0, 0) && info.exists && info.suspended) {
log_debug_activation("Found suspended layered LV %s in critical section().", display_lvname(lv));
return 0; /* There is suspended subLV in the tree */
}
return 1;
}
static int _lv_resume(struct cmd_context *cmd, const char *lvid_s,
struct lv_activate_opts *laopts, int error_if_not_active,
const struct logical_volume *lv)
{
struct dm_list *snh;
struct lvinfo info;
int r = 0;
if (!activation())
return 1;
if (!lv_is_origin(lv) && !lv_is_thin_volume(lv) && !lv_is_thin_pool(lv))
laopts->origin_only = 0;
if (test_mode()) {
_skip("Resuming %s%s%s.", display_lvname(lv),
laopts->origin_only ? " without snapshots" : "",
laopts->revert ? " (reverting)" : "");
r = 1;
goto out;
}
log_debug_activation("Resuming LV %s%s%s%s.", display_lvname(lv),
error_if_not_active ? "" : " if active",
laopts->origin_only ?
(lv_is_thin_pool(lv) ? " pool only" :
lv_is_thin_volume(lv) ? " thin only" : " without snapshots") : "",
laopts->revert ? " (reverting)" : "");
if (laopts->revert)
goto needs_resume;
if (!lv_info(cmd, lv, laopts->origin_only, &info, 0, 0))
goto_out;
if (!info.exists || !info.suspended) {
if (error_if_not_active)
goto_out;
/* ATM only thin-pool with origin-only suspend does not really suspend anything
* it's used only for message passing to thin-pool */
if (laopts->origin_only && lv_is_thin_pool(lv))
critical_section_dec(cmd, "resumed");
if (!info.suspended && critical_section()) {
/* Validation check if any subLV is suspended */
if (!laopts->origin_only && lv_is_origin(lv)) {
/* Check all snapshots for this origin LV */
dm_list_iterate(snh, &lv->snapshot_segs)
if (!_check_suspended_lv(dm_list_struct_base(snh, struct lv_segment, origin_list)->cow, NULL))
goto needs_resume; /* Found suspended snapshot */
}
if ((r = for_each_sub_lv((struct logical_volume *)lv, &_check_suspended_lv, NULL)))
goto out; /* Nothing was found suspended */
} else {
r = 1;
goto out;
}
}
needs_resume:
laopts->read_only = _passes_readonly_filter(cmd, lv);
laopts->resuming = 1;
if (!_lv_activate_lv(lv, laopts))
goto_out;
critical_section_dec(cmd, "resumed");
if (!monitor_dev_for_events(cmd, lv, laopts, 1))
stack;
r = 1;
out:
return r;
}
/*
* In a cluster, set exclusive to indicate that only one node is using the
* device. Any tables loaded may then use non-clustered targets.
*
* @origin_only
* @exclusive This parameter only has an affect in cluster-context.
* It forces local target type to be used (instead of
* cluster-aware type).
* Returns success if the device is not active
*/
int lv_resume_if_active(struct cmd_context *cmd, const char *lvid_s,
unsigned origin_only, unsigned exclusive,
unsigned revert, const struct logical_volume *lv)
{
struct lv_activate_opts laopts = {
.exclusive = exclusive,
.origin_only = origin_only,
.revert = revert
};
return _lv_resume(cmd, lvid_s, &laopts, 0, lv);
}
int lv_resume(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only,
const struct logical_volume *lv)
{
struct lv_activate_opts laopts = { .origin_only = origin_only, };
return _lv_resume(cmd, lvid_s, &laopts, 1, lv);
}
static int _lv_has_open_snapshots(const struct logical_volume *lv)
{
struct lv_segment *snap_seg;
int r = 0;
dm_list_iterate_items_gen(snap_seg, &lv->snapshot_segs, origin_list)
if (!lv_check_not_in_use(snap_seg->cow, 1))
r++;
if (r)
log_error("LV %s has open %d snapshot(s), not deactivating.",
display_lvname(lv), r);
return r;
}
int lv_deactivate(struct cmd_context *cmd, const char *lvid_s, const struct logical_volume *lv)
{
struct lvinfo info;
const struct lv_activate_opts laopts = { .skip_in_use = 1 };
struct dm_list *snh;
int r = 0;
if (!activation())
return 1;
if (test_mode()) {
_skip("Deactivating %s.", display_lvname(lv));
r = 1;
goto out;
}
log_debug_activation("Deactivating %s.", display_lvname(lv));
if (lv_is_visible(lv) || lv_is_virtual_origin(lv) ||
lv_is_merging_thin_snapshot(lv)) {
switch (lv_check_not_in_use(lv, 1)) {
case 0: goto_out;
case 2: goto no_exists;
}
if (lv_is_origin(lv) && _lv_has_open_snapshots(lv))
goto_out;
} else {
if (!lv_info(cmd, lv, 0, &info, 0, 0))
goto_out;
if (!info.exists) {
no_exists:
r = 1;
/* Check attached snapshot segments are also inactive */
dm_list_iterate(snh, &lv->snapshot_segs) {
if (!lv_info(cmd, dm_list_struct_base(snh, struct lv_segment, origin_list)->cow,
0, &info, 0, 0))
goto_out;
if (info.exists) {
r = 0; /* Snapshot left in table? */
break;
}
}
if (lv_is_vdo_pool(lv)) {
/* If someone has remove 'linear' mapping over VDO device
* we may still be able to deactivate the rest of the tree
* i.e. in test-suite we simulate this via 'dmsetup remove' */
if (!lv_info(cmd, lv, 1, &info, 1, 0))
goto_out;
if (info.exists && !info.open_count)
r = 0; /* Unused VDO device left in table? */
}
if (r)
goto out;
}
}
if (!monitor_dev_for_events(cmd, lv, &laopts, 0))
stack;
critical_section_inc(cmd, "deactivating");
r = _lv_deactivate(lv);
/*
* Remove any transiently activated error
* devices which arean't used any more.
*/
if (r && lv_is_raid(lv) && !lv_deactivate_any_missing_subdevs(lv)) {
log_error("Failed to remove temporary SubLVs from %s",
display_lvname(lv));
r = 0;
}
critical_section_dec(cmd, "deactivated");
if (!lv_info(cmd, lv, 0, &info, 0, 0) || info.exists) {
/* Turn into log_error, but we do not log error */
log_debug_activation("Deactivated volume is still %s present.",
display_lvname(lv));
r = 0;
}
out:
return r;
}
/* Test if LV passes filter */
int lv_activation_filter(struct cmd_context *cmd, const char *lvid_s,
int *activate, const struct logical_volume *lv)
{
if (!activation()) {
*activate = 1;
return 1;
}
if (!_passes_activation_filter(cmd, lv)) {
log_verbose("Not activating %s since it does not pass "
"activation filter.", display_lvname(lv));
*activate = 0;
} else
*activate = 1;
return 1;
}
static int _lv_activate(struct cmd_context *cmd, const char *lvid_s,
struct lv_activate_opts *laopts, int filter,
const struct logical_volume *lv)
{
struct lvinfo info;
int r = 0;
if (!activation())
return 1;
if (filter && !_passes_activation_filter(cmd, lv)) {
log_verbose("Not activating %s since it does not pass "
"activation filter.", display_lvname(lv));
r = 1;
goto out;
}
if ((cmd->partial_activation || cmd->degraded_activation) &&
lv_is_partial(lv) && lv_is_raid(lv) && lv_raid_has_integrity((struct logical_volume *)lv)) {
cmd->partial_activation = 0;
cmd->degraded_activation = 0;
log_print_unless_silent("No degraded or partial activation for raid with integrity.");
}
if ((!lv->vg->cmd->partial_activation) && lv_is_partial(lv)) {
if (!lv_is_raid_type(lv) || !partial_raid_lv_supports_degraded_activation(lv)) {
log_error("Refusing activation of partial LV %s. "
"Use '--activationmode partial' to override.",
display_lvname(lv));
goto out;
}
if (!lv->vg->cmd->degraded_activation) {
log_error("Refusing activation of partial LV %s. "
"Try '--activationmode degraded'.",
display_lvname(lv));
goto out;
}
}
if ((cmd->partial_activation || cmd->degraded_activation) && lv_is_writecache(lv)) {
struct logical_volume *lv_fast = first_seg(lv)->writecache;
if (lv_is_partial(lv) || (lv_fast && lv_is_partial(lv_fast))) {
log_error("Cannot use partial or degraded activation with writecache.");
goto out;
}
}
if (lv_has_unknown_segments(lv)) {
log_error("Refusing activation of LV %s containing "
"an unrecognised segment.", display_lvname(lv));
goto out;
}
if (lv_raid_has_visible_sublvs(lv)) {
log_error("Refusing activation of RAID LV %s with "
"visible SubLVs.", display_lvname(lv));
goto out;
}
if (test_mode()) {
_skip("Activating %s.", display_lvname(lv));
r = 1;
goto out;
}
/* Component LV activation is enforced to be 'read-only' */
/* TODO: should not apply for LVs in maintenance mode */
if (!lv_is_visible(lv) && lv_is_component(lv)) {
laopts->read_only = 1;
laopts->component_lv = lv;
} else if (lv_is_pool_metadata_spare(lv)) {
laopts->component_lv = lv;
} else if (filter)
laopts->read_only = _passes_readonly_filter(cmd, lv);
log_debug_activation("Activating %s%s%s%s%s.", display_lvname(lv),
laopts->exclusive ? " exclusively" : "",
laopts->read_only ? " read-only" : "",
laopts->noscan ? " noscan" : "",
laopts->temporary ? " temporary" : "");
if (!lv_info_with_name_check(cmd, lv, 0, &info))
goto_out;
/*
* Nothing to do?
*/
if (info.exists && !info.suspended && info.live_table &&
(info.read_only == read_only_lv(lv, laopts, NULL))) {
r = 1;
log_debug_activation("LV %s is already active.", display_lvname(lv));
goto out;
}
lv_calculate_readahead(lv, NULL);
critical_section_inc(cmd, "activating");
if (!(r = _lv_activate_lv(lv, laopts)))
stack;
critical_section_dec(cmd, "activated");
if (r && !monitor_dev_for_events(cmd, lv, laopts, 1))
stack;
out:
return r;
}
/* Activate LV */
int lv_activate(struct cmd_context *cmd, const char *lvid_s, int exclusive,
int noscan, int temporary, const struct logical_volume *lv)
{
struct lv_activate_opts laopts = { .exclusive = exclusive,
.noscan = noscan,
.temporary = temporary };
if (!_lv_activate(cmd, lvid_s, &laopts, 0, lv))
return_0;
return 1;
}
/* Activate LV only if it passes filter */
int lv_activate_with_filter(struct cmd_context *cmd, const char *lvid_s, int exclusive,
int noscan, int temporary, const struct logical_volume *lv)
{
struct lv_activate_opts laopts = { .exclusive = exclusive,
.noscan = noscan,
.temporary = temporary };
if (!_lv_activate(cmd, lvid_s, &laopts, 1, lv))
return_0;
return 1;
}
int lv_mknodes(struct cmd_context *cmd, const struct logical_volume *lv)
{
int r;
if (!lv) {
r = dm_mknodes(NULL);
fs_unlock();
return r;
}
if (!activation())
return 1;
r = dev_manager_mknodes(lv);
fs_unlock();
return r;
}
/* Remove any existing, closed mapped device by @name */
static int _remove_dm_dev_by_name(const char *name)
{
int r = 0;
struct dm_task *dmt;
struct dm_info info;
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return_0;
/* Check, if the device exists. */
if (dm_task_set_name(dmt, name) && dm_task_run(dmt) && dm_task_get_info(dmt, &info)) {
dm_task_destroy(dmt);
/* Ignore non-existing or open dm devices */
if (!info.exists || info.open_count)
return 1;
if (!(dmt = dm_task_create(DM_DEVICE_REMOVE)))
return_0;
if (dm_task_set_name(dmt, name))
r = dm_task_run(dmt);
}
dm_task_destroy(dmt);
return r;
}
/* Work all segments of @lv removing any existing, closed "*-missing_N_0" sub devices. */
static int _lv_remove_any_missing_subdevs(struct logical_volume *lv)
{
char name[NAME_LEN];
struct lv_segment *seg;
uint32_t seg_no = 0;
if (lv) {
dm_list_iterate_items(seg, &lv->segments) {
if (dm_snprintf(name, sizeof(name), "%s-%s-missing_%u_0", seg->lv->vg->name, seg->lv->name, seg_no) < 0)
return_0;
if (!_remove_dm_dev_by_name(name))
return_0;
seg_no++;
}
}
return 1;
}
/* Remove any "*-missing_*" sub devices added by the activation layer for an rmate/rimage missing PV mapping */
int lv_deactivate_any_missing_subdevs(const struct logical_volume *lv)
{
uint32_t s;
struct lv_segment *seg = first_seg(lv);
for (s = 0; s < seg->area_count; s++) {
if (seg_type(seg, s) == AREA_LV &&
!_lv_remove_any_missing_subdevs(seg_lv(seg, s)))
return_0;
if (seg->meta_areas && seg_metatype(seg, s) == AREA_LV &&
!_lv_remove_any_missing_subdevs(seg_metalv(seg, s)))
return_0;
}
return 1;
}
/*
* Does PV use VG somewhere in its construction?
* Returns 1 on failure.
*/
int pv_uses_vg(struct physical_volume *pv,
struct volume_group *vg)
{
if (!activation() || !pv->dev)
return 0;
if (!dm_is_dm_major(MAJOR(pv->dev->dev)))
return 0;
return dev_manager_device_uses_vg(pv->dev, vg);
}
void activation_release(void)
{
if (critical_section())
/* May leak stacked operation */
log_error("Releasing activation in critical section.");
fs_unlock(); /* Implicit dev_manager_release(); */
}
void activation_exit(void)
{
activation_release();
dev_manager_exit();
}
#endif
static int _component_cb(struct logical_volume *lv, void *data)
{
struct logical_volume **component_lv = (struct logical_volume **) data;
if (lv_is_locked(lv) || lv_is_pvmove(lv) ||/* ignoring */
/* thin-pool is special and it's using layered device */
(lv_is_thin_pool(lv) && thin_pool_is_active(lv)))
return -1;
/* External origin is activated through thinLV and uses -real suffix.
* Note: for old clustered logic we would need to check for all thins */
if ((lv_is_external_origin(lv) && lv_info(lv->vg->cmd, lv, 1, NULL, 0, 0)) ||
lv_is_active(lv)) {
if (!lv_is_component(lv) || lv_is_visible(lv))
return -1; /* skip whole subtree */
log_debug_activation("Found active component LV %s.", display_lvname(lv));
*component_lv = lv;
return 0; /* break any further processing */
}
return 1;
}
/*
* Finds out for any LV if any of its component LVs are active.
* Function first checks if an existing LV is visible and active eventually
* it's lock holding LV is already active. In such case sub LV cannot be
* actived alone and no further checking is needed.
*
* Returns active component LV if there is such.
*/
const struct logical_volume *lv_component_is_active(const struct logical_volume *lv)
{
const struct logical_volume *component_lv = NULL;
const struct logical_volume *holder_lv = lv_lock_holder(lv);
if ((holder_lv != lv) && lv_is_active(holder_lv))
return NULL; /* Lock holding LV is active, do not check components */
if (_component_cb((struct logical_volume *) lv, &holder_lv) == 1)
(void) for_each_sub_lv((struct logical_volume *) lv, _component_cb,
(void*) &component_lv);
return component_lv;
}
/*
* Finds out if any LV above is active, as stacked device tree can be composed of
* chained set of LVs.
*
* Returns active holder LV if there is such.
*/
const struct logical_volume *lv_holder_is_active(const struct logical_volume *lv)
{
const struct logical_volume *holder;
const struct seg_list *sl;
if (lv_is_locked(lv) || lv_is_pvmove(lv))
return NULL; /* Skip pvmove/locked LV tracking */
dm_list_iterate_items(sl, &lv->segs_using_this_lv) {
/* Recursive call for upper-stack holder */
if ((holder = lv_holder_is_active(sl->seg->lv)))
return holder;
if (lv_is_active(sl->seg->lv)) {
log_debug_activation("Found active holder LV %s.", display_lvname(sl->seg->lv));
return sl->seg->lv;
}
}
return NULL;
}
static int _deactivate_sub_lv_cb(struct logical_volume *lv, void *data)
{
struct logical_volume **slv = data;
if (lv_is_thin_pool(lv) || lv_is_external_origin(lv))
return -1;
if (!deactivate_lv(lv->vg->cmd, lv)) {
*slv = lv;
return 0;
}
return 1;
}
/*
* Deactivates LV toghether with explicit deactivation call made also for all its component LVs.
*/
int deactivate_lv_with_sub_lv(const struct logical_volume *lv)
{
struct logical_volume *flv = NULL;
if (!deactivate_lv(lv->vg->cmd, lv)) {
log_error("Cannot deactivate logical volume %s.",
display_lvname(lv));
return 0;
}
if (!for_each_sub_lv((struct logical_volume *)lv, _deactivate_sub_lv_cb, &flv)) {
log_error("Cannot deactivate subvolume %s of logical volume %s.",
(flv) ? display_lvname(flv) : "", display_lvname(lv));
return 0;
}
return 1;
}
int activate_lv(struct cmd_context *cmd, const struct logical_volume *lv)
{
const struct logical_volume *active_lv;
int ret;
/*
* When trying activating component LV, make sure none of sub component
* LV or LVs that are using it are active.
*/
if (!lv_is_visible(lv))
active_lv = lv_holder_is_active(lv);
else
active_lv = lv_component_is_active(lv);
if (active_lv) {
log_error("Activation of logical volume %s is prohibited while logical volume %s is active.",
display_lvname(lv), display_lvname(active_lv));
ret = 0;
goto out;
}
ret = lv_activate_with_filter(cmd, NULL, 0,
(lv->status & LV_NOSCAN) ? 1 : 0,
(lv->status & LV_TEMPORARY) ? 1 : 0,
lv_committed(lv));
out:
return ret;
}
int deactivate_lv(struct cmd_context *cmd, const struct logical_volume *lv)
{
int ret;
ret = lv_deactivate(cmd, NULL, lv_committed(lv));
return ret;
}
int suspend_lv(struct cmd_context *cmd, const struct logical_volume *lv)
{
int ret;
critical_section_inc(cmd, "locking for suspend");
ret = lv_suspend_if_active(cmd, NULL, 0, 0, lv_committed(lv), lv);
return ret;
}
int suspend_lv_origin(struct cmd_context *cmd, const struct logical_volume *lv)
{
int ret;
critical_section_inc(cmd, "locking for suspend");
ret = lv_suspend_if_active(cmd, NULL, 1, 0, lv_committed(lv), lv);
return ret;
}
int resume_lv(struct cmd_context *cmd, const struct logical_volume *lv)
{
int ret;
ret = lv_resume_if_active(cmd, NULL, 0, 0, 0, lv_committed(lv));
critical_section_dec(cmd, "unlocking on resume");
return ret;
}
int resume_lv_origin(struct cmd_context *cmd, const struct logical_volume *lv)
{
int ret;
ret = lv_resume_if_active(cmd, NULL, 1, 0, 0, lv_committed(lv));
critical_section_dec(cmd, "unlocking on resume");
return ret;
}
int revert_lv(struct cmd_context *cmd, const struct logical_volume *lv)
{
int ret;
ret = lv_resume_if_active(cmd, NULL, 0, 0, 1, lv_committed(lv));
critical_section_dec(cmd, "unlocking on revert");
return ret;
}
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