mirror of
git://sourceware.org/git/lvm2.git
synced 2024-10-28 20:25:52 +03:00
327 lines
5.2 KiB
C
327 lines
5.2 KiB
C
/*
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* Copyright (C) 2001 Sistina Software (UK) Limited.
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*
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* This file is released under the LGPL.
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*/
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#include "metadata.h"
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#include "activate.h"
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#include "ll-activate.h"
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#include "display.h"
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#include "log.h"
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#include "fs.h"
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#include "lvm-string.h"
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#include "names.h"
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#include <limits.h>
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#define _skip(fmt, args...) log_very_verbose("Skipping: " fmt , ## args)
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int library_version(char *version, size_t size)
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{
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if (!dm_get_library_version(version, size))
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return 0;
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return 1;
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}
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int driver_version(char *version, size_t size)
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{
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int r = 0;
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struct dm_task *dmt;
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log_very_verbose("Getting driver version");
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if (!(dmt = dm_task_create(DM_DEVICE_VERSION))) {
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stack;
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return 0;
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}
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if (!dm_task_run(dmt))
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log_error("Failed to get driver version");
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if (!dm_task_get_driver_version(dmt, version, size))
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goto out;
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r = 1;
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out:
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dm_task_destroy(dmt);
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return r;
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}
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static int _query(struct logical_volume *lv, int (*fn)(const char *))
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{
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char buffer[128];
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if (!build_dm_name(buffer, sizeof(buffer), "",
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lv->vg->name, lv->name)) {
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stack;
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return -1;
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}
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return fn(buffer);
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}
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/*
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* These three functions return the number of LVs in the state,
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* or -1 on error.
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*/
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int lv_active(struct logical_volume *lv)
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{
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return _query(lv, device_active);
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}
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int lv_suspended(struct logical_volume *lv)
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{
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return _query(lv, device_suspended);
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}
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int lv_open_count(struct logical_volume *lv)
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{
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return _query(lv, device_open_count);
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}
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/*
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* Returns 1 if info structure populated, else 0 on failure.
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*/
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int lv_info(struct logical_volume *lv, struct dm_info *info)
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{
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char buffer[128];
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if (!build_dm_name(buffer, sizeof(buffer), "",
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lv->vg->name, lv->name)) {
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stack;
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return 0;
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}
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return device_info(buffer, info);
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}
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int lv_activate(struct logical_volume *lv)
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{
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char buffer[128];
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if (test_mode()) {
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_skip("Activation of '%s'.", lv->name);
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return 0;
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}
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if (!build_dm_name(buffer, sizeof(buffer), "",
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lv->vg->name, lv->name)) {
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stack;
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return 0;
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}
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if (!device_create_lv(buffer, lv, lv->minor)) {
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stack;
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return 0;
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}
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if (!fs_add_lv(lv, lv->minor)) {
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stack;
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return 0;
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}
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return 1;
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}
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int lv_reactivate(struct logical_volume *lv)
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{
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int r;
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char buffer[128];
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if (test_mode()) {
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_skip("Reactivation of '%s'.", lv->name);
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return 0;
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}
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if (!build_dm_name(buffer, sizeof(buffer), "",
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lv->vg->name, lv->name)) {
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stack;
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return 0;
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}
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if (!device_suspended(buffer) && !device_suspend(buffer)) {
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stack;
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return 0;
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}
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r = device_reload_lv(buffer, lv);
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if (!device_resume(buffer)) {
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stack;
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return 0;
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}
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return r;
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}
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int lv_deactivate(struct logical_volume *lv)
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{
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char buffer[128];
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log_very_verbose("Deactivating %s", lv->name);
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if (test_mode()) {
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_skip("Deactivating '%s'.", lv->name);
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return 0;
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}
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if (!build_dm_name(buffer, sizeof(buffer), "",
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lv->vg->name, lv->name)) {
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stack;
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return 0;
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}
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if (!device_deactivate(buffer)) {
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stack;
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return 0;
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}
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fs_del_lv(lv);
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return 1;
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}
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int lv_suspend(struct logical_volume *lv)
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{
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char buffer[128];
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log_very_verbose("Suspending %s", lv->name);
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if (test_mode()) {
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_skip("Suspending '%s'.", lv->name);
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return 0;
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}
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if (!build_dm_name(buffer, sizeof(buffer), "",
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lv->vg->name, lv->name)) {
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stack;
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return 0;
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}
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if (!device_suspend(buffer)) {
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stack;
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return 0;
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}
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fs_del_lv(lv);
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return 1;
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}
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int lv_rename(const char *old_name, struct logical_volume *lv)
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{
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int r = 0;
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char new_name[PATH_MAX];
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struct dm_task *dmt;
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if (test_mode()) {
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_skip("Rename '%s' to '%s'.", old_name, lv->name);
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return 0;
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}
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if (!(dmt = setup_dm_task(old_name, DM_DEVICE_RENAME))) {
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stack;
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return 0;
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}
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if (!build_dm_name(new_name, sizeof(new_name), "",
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lv->vg->name, lv->name)) {
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stack;
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return 0;
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}
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if (!dm_task_set_newname(dmt, new_name)) {
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stack;
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r = 0;
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goto end;
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}
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if (!dm_task_run(dmt)) {
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stack;
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r = 0;
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goto end;
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}
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fs_rename_lv(old_name, lv);
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end:
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dm_task_destroy(dmt);
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return r;
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}
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int activate_lvs_in_vg(struct volume_group *vg)
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{
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struct list *lvh;
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struct logical_volume *lv;
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int count = 0;
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list_iterate(lvh, &vg->lvs) {
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lv = list_item(lvh, struct lv_list)->lv;
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count += (!lv_active(lv) && lv_activate(lv));
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}
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return count;
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}
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int lv_update_write_access(struct logical_volume *lv)
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{
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struct dm_info info;
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if (!lv_info(lv, &info)) {
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stack;
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return 0;
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}
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if (!info.exists || info.suspended)
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/* Noop */
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return 1;
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return lv_reactivate(lv);
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}
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int deactivate_lvs_in_vg(struct volume_group *vg)
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{
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struct list *lvh;
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struct logical_volume *lv;
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int count = 0;
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list_iterate(lvh, &vg->lvs) {
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lv = list_item(lvh, struct lv_list)->lv;
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count += ((lv_active(lv) == 1) && lv_deactivate(lv));
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}
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return count;
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}
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int lvs_in_vg_activated(struct volume_group *vg)
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{
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struct list *lvh;
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struct logical_volume *lv;
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int count = 0;
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list_iterate(lvh, &vg->lvs) {
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lv = list_item(lvh, struct lv_list)->lv;
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count += (lv_active(lv) == 1);
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}
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return count;
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}
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int lvs_in_vg_opened(struct volume_group *vg)
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{
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struct list *lvh;
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struct logical_volume *lv;
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int count = 0;
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list_iterate(lvh, &vg->lvs) {
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lv = list_item(lvh, struct lv_list)->lv;
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count += (lv_open_count(lv) == 1);
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}
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return count;
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}
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