mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-27 07:22:49 +03:00
700 lines
12 KiB
C
700 lines
12 KiB
C
/*
|
|
* Copyright (C) 2001 Sistina Software (UK) Limited.
|
|
*
|
|
* This file is released under the LGPL.
|
|
*/
|
|
|
|
#include "lib.h"
|
|
#include "metadata.h"
|
|
#include "activate.h"
|
|
#include "memlock.h"
|
|
#include "display.h"
|
|
#include "fs.h"
|
|
#include "lvm-string.h"
|
|
#include "pool.h"
|
|
#include "toolcontext.h"
|
|
#include "dev_manager.h"
|
|
#include "str_list.h"
|
|
|
|
#include <limits.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
#define _skip(fmt, args...) log_very_verbose("Skipping: " fmt , ## args)
|
|
|
|
#ifndef DEVMAPPER_SUPPORT
|
|
void set_activation(int act)
|
|
{
|
|
static int warned = 0;
|
|
|
|
if (warned || !act)
|
|
return;
|
|
|
|
log_error("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 lv_info(const struct logical_volume *lv, struct lvinfo *info)
|
|
{
|
|
return 0;
|
|
}
|
|
int lv_info_by_lvid(struct cmd_context *cmd, const char *lvid_s,
|
|
struct lvinfo *info)
|
|
{
|
|
return 0;
|
|
}
|
|
int lv_snapshot_percent(struct logical_volume *lv, float *percent)
|
|
{
|
|
return 0;
|
|
}
|
|
int lv_mirror_percent(struct logical_volume *lv, int wait, float *percent,
|
|
uint32_t *event_nr)
|
|
{
|
|
return 0;
|
|
}
|
|
int lvs_in_vg_activated(struct volume_group *vg)
|
|
{
|
|
return 0;
|
|
}
|
|
int lvs_in_vg_opened(struct volume_group *vg)
|
|
{
|
|
return 0;
|
|
}
|
|
int lv_suspend(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return 1;
|
|
}
|
|
int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return 1;
|
|
}
|
|
int lv_resume(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return 1;
|
|
}
|
|
int lv_resume_if_active(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return 1;
|
|
}
|
|
int lv_deactivate(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return 1;
|
|
}
|
|
int lv_activation_filter(struct cmd_context *cmd, const char *lvid_s,
|
|
int *activate_lv)
|
|
{
|
|
return 1;
|
|
}
|
|
int lv_activate(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return 1;
|
|
}
|
|
int lv_activate_with_filter(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
int lv_mknodes(struct cmd_context *cmd, const struct logical_volume *lv)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
void activation_exit(void)
|
|
{
|
|
return;
|
|
}
|
|
|
|
#else /* DEVMAPPER_SUPPORT */
|
|
|
|
static int _activation = 1;
|
|
|
|
void set_activation(int act)
|
|
{
|
|
if (act == _activation)
|
|
return;
|
|
|
|
_activation = act;
|
|
if (_activation)
|
|
log_verbose("Activation enabled. Device-mapper kernel "
|
|
"driver will be used.");
|
|
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,
|
|
struct logical_volume *lv)
|
|
{
|
|
struct config_node *cn;
|
|
struct config_value *cv;
|
|
char *str;
|
|
char path[PATH_MAX];
|
|
|
|
if (!(cn = find_config_node(cmd->cft->root, "activation/volume_list"))) {
|
|
/* If no hosts tags defined, activate */
|
|
if (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) ||
|
|
str_list_match_list(&cmd->tags, &lv->vg->tags))
|
|
return 1;
|
|
|
|
/* Don't activate */
|
|
return 0;
|
|
}
|
|
|
|
for (cv = cn->v; cv; cv = cv->next) {
|
|
if (cv->type != CFG_STRING) {
|
|
log_error("Ignoring invalid string in config file "
|
|
"activation/volume_list");
|
|
continue;
|
|
}
|
|
str = cv->v.str;
|
|
if (!*str) {
|
|
log_error("Ignoring empty string in config file "
|
|
"activation/volume_list");
|
|
continue;
|
|
}
|
|
|
|
/* Tag? */
|
|
if (*str == '@') {
|
|
str++;
|
|
if (!*str) {
|
|
log_error("Ignoring empty tag in config file "
|
|
"activation/volume_list");
|
|
continue;
|
|
}
|
|
/* If any host tag matches any LV or VG tag, activate */
|
|
if (!strcmp(str, "*")) {
|
|
if (str_list_match_list(&cmd->tags, &lv->tags)
|
|
|| str_list_match_list(&cmd->tags,
|
|
&lv->vg->tags))
|
|
return 1;
|
|
else
|
|
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;
|
|
else
|
|
continue;
|
|
}
|
|
if (!index(str, '/')) {
|
|
/* vgname supplied */
|
|
if (!strcmp(str, lv->vg->name))
|
|
return 1;
|
|
else
|
|
continue;
|
|
}
|
|
/* vgname/lvname */
|
|
if (lvm_snprintf(path, sizeof(path), "%s/%s", lv->vg->name,
|
|
lv->name) < 0) {
|
|
log_error("lvm_snprintf error from %s/%s", lv->vg->name,
|
|
lv->name);
|
|
continue;
|
|
}
|
|
if (!strcmp(path, str))
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int library_version(char *version, size_t size)
|
|
{
|
|
if (!activation())
|
|
return 0;
|
|
|
|
if (!dm_get_library_version(version, size))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
int driver_version(char *version, size_t size)
|
|
{
|
|
int r = 0;
|
|
struct dm_task *dmt;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
log_very_verbose("Getting driver version");
|
|
if (!(dmt = dm_task_create(DM_DEVICE_VERSION))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_run(dmt))
|
|
log_error("Failed to get driver version");
|
|
|
|
if (!dm_task_get_driver_version(dmt, version, size))
|
|
goto out;
|
|
|
|
r = 1;
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if info structure populated, else 0 on failure.
|
|
*/
|
|
static int _lv_info(const struct logical_volume *lv, int mknodes,
|
|
struct lvinfo *info)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
struct dm_info dminfo;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!(r = dev_manager_info(dm, lv, mknodes, &dminfo)))
|
|
stack;
|
|
|
|
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;
|
|
|
|
dev_manager_destroy(dm);
|
|
return r;
|
|
}
|
|
|
|
int lv_info(const struct logical_volume *lv, struct lvinfo *info)
|
|
{
|
|
return _lv_info(lv, 0, info);
|
|
}
|
|
|
|
int lv_info_by_lvid(struct cmd_context *cmd, const char *lvid_s,
|
|
struct lvinfo *info)
|
|
{
|
|
struct logical_volume *lv;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s)))
|
|
return 0;
|
|
|
|
return _lv_info(lv, 0, info);
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if percent set, else 0 on failure.
|
|
*/
|
|
int lv_snapshot_percent(struct logical_volume *lv, float *percent)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
|
|
stack;
|
|
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 logical_volume *lv, int wait, float *percent,
|
|
uint32_t *event_nr)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!(r = dev_manager_mirror_percent(dm, lv, wait, percent, event_nr)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int _lv_active(struct logical_volume *lv)
|
|
{
|
|
struct lvinfo info;
|
|
|
|
if (!lv_info(lv, &info)) {
|
|
stack;
|
|
return -1;
|
|
}
|
|
|
|
return info.exists;
|
|
}
|
|
|
|
static int _lv_open_count(struct logical_volume *lv)
|
|
{
|
|
struct lvinfo info;
|
|
|
|
if (!lv_info(lv, &info)) {
|
|
stack;
|
|
return -1;
|
|
}
|
|
|
|
return info.open_count;
|
|
}
|
|
|
|
/* FIXME Need to detect and handle an lv rename */
|
|
static int _lv_activate_lv(struct logical_volume *lv)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!(r = dev_manager_activate(dm, lv)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
return r;
|
|
}
|
|
|
|
static int _lv_deactivate(struct logical_volume *lv)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!(r = dev_manager_deactivate(dm, lv)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
return r;
|
|
}
|
|
|
|
static int _lv_suspend_lv(struct logical_volume *lv)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!(r = dev_manager_suspend(dm, lv)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* These two functions return the number of LVs in the state,
|
|
* or -1 on error.
|
|
*/
|
|
int lvs_in_vg_activated(struct volume_group *vg)
|
|
{
|
|
struct list *lvh;
|
|
struct logical_volume *lv;
|
|
int count = 0;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
list_iterate(lvh, &vg->lvs) {
|
|
lv = list_item(lvh, struct lv_list)->lv;
|
|
count += (_lv_active(lv) == 1);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
int lvs_in_vg_opened(struct volume_group *vg)
|
|
{
|
|
struct list *lvh;
|
|
struct logical_volume *lv;
|
|
int count = 0;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
list_iterate(lvh, &vg->lvs) {
|
|
lv = list_item(lvh, struct lv_list)->lv;
|
|
count += (_lv_open_count(lv) == 1);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static int _lv_suspend(struct cmd_context *cmd, const char *lvid_s,
|
|
int error_if_not_suspended)
|
|
{
|
|
struct logical_volume *lv;
|
|
struct lvinfo info;
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s)))
|
|
return 0;
|
|
|
|
if (test_mode()) {
|
|
_skip("Suspending '%s'.", lv->name);
|
|
return 1;
|
|
}
|
|
|
|
if (!lv_info(lv, &info)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!info.exists || info.suspended)
|
|
return error_if_not_suspended ? 0 : 1;
|
|
|
|
memlock_inc();
|
|
if (!_lv_suspend_lv(lv)) {
|
|
memlock_dec();
|
|
fs_unlock();
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Returns success if the device is not active */
|
|
int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return _lv_suspend(cmd, lvid_s, 0);
|
|
}
|
|
|
|
int lv_suspend(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return _lv_suspend(cmd, lvid_s, 1);
|
|
}
|
|
|
|
static int _lv_resume(struct cmd_context *cmd, const char *lvid_s,
|
|
int error_if_not_active)
|
|
{
|
|
struct logical_volume *lv;
|
|
struct lvinfo info;
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s)))
|
|
return 0;
|
|
|
|
if (test_mode()) {
|
|
_skip("Resuming '%s'.", lv->name);
|
|
return 1;
|
|
}
|
|
|
|
if (!lv_info(lv, &info)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!info.exists || !info.suspended)
|
|
return error_if_not_active ? 0 : 1;
|
|
|
|
if (!_lv_activate_lv(lv))
|
|
return 0;
|
|
|
|
memlock_dec();
|
|
fs_unlock();
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Returns success if the device is not active */
|
|
int lv_resume_if_active(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return _lv_resume(cmd, lvid_s, 0);
|
|
}
|
|
|
|
int lv_resume(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return _lv_resume(cmd, lvid_s, 1);
|
|
}
|
|
|
|
int lv_deactivate(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
struct logical_volume *lv;
|
|
struct lvinfo info;
|
|
int r;
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s)))
|
|
return 0;
|
|
|
|
if (test_mode()) {
|
|
_skip("Deactivating '%s'.", lv->name);
|
|
return 1;
|
|
}
|
|
|
|
if (!lv_info(lv, &info)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!info.exists)
|
|
return 1;
|
|
|
|
if (info.open_count) {
|
|
log_error("LV %s/%s in use: not removing", lv->vg->name,
|
|
lv->name);
|
|
return 0;
|
|
}
|
|
|
|
memlock_inc();
|
|
r = _lv_deactivate(lv);
|
|
memlock_dec();
|
|
fs_unlock();
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Test if LV passes filter */
|
|
int lv_activation_filter(struct cmd_context *cmd, const char *lvid_s,
|
|
int *activate_lv)
|
|
{
|
|
struct logical_volume *lv;
|
|
|
|
if (!activation())
|
|
goto activate;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s)))
|
|
return 0;
|
|
|
|
if (!_passes_activation_filter(cmd, lv)) {
|
|
log_verbose("Not activating %s/%s due to config file settings",
|
|
lv->vg->name, lv->name);
|
|
*activate_lv = 0;
|
|
return 1;
|
|
}
|
|
|
|
activate:
|
|
*activate_lv = 1;
|
|
return 1;
|
|
}
|
|
|
|
static int _lv_activate(struct cmd_context *cmd, const char *lvid_s, int filter)
|
|
{
|
|
struct logical_volume *lv;
|
|
struct lvinfo info;
|
|
int r;
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s)))
|
|
return 0;
|
|
|
|
if (filter && !_passes_activation_filter(cmd, lv)) {
|
|
log_verbose("Not activating %s/%s due to config file settings",
|
|
lv->vg->name, lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (test_mode()) {
|
|
_skip("Activating '%s'.", lv->name);
|
|
return 1;
|
|
}
|
|
|
|
if (!lv_info(lv, &info)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (info.exists && !info.suspended)
|
|
return 1;
|
|
|
|
memlock_inc();
|
|
r = _lv_activate_lv(lv);
|
|
memlock_dec();
|
|
fs_unlock();
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Activate LV */
|
|
int lv_activate(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return _lv_activate(cmd, lvid_s, 0);
|
|
}
|
|
|
|
/* Activate LV only if it passes filter */
|
|
int lv_activate_with_filter(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return _lv_activate(cmd, lvid_s, 1);
|
|
}
|
|
|
|
int lv_mknodes(struct cmd_context *cmd, const struct logical_volume *lv)
|
|
{
|
|
struct lvinfo info;
|
|
int r = 1;
|
|
|
|
if (!_lv_info(lv, 1, &info)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (info.exists)
|
|
r = dev_manager_mknodes(lv);
|
|
else
|
|
r = dev_manager_rmnodes(lv);
|
|
|
|
fs_unlock();
|
|
|
|
return r;
|
|
}
|
|
|
|
void activation_exit(void)
|
|
{
|
|
dev_manager_exit();
|
|
}
|
|
#endif
|