mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +03:00
fdc7af232a
fill in an already created dm_task. This allows common code, such as minor number selection, and read_only to be lifted.
434 lines
7.1 KiB
C
434 lines
7.1 KiB
C
/*
|
|
* Copyright (C) 2001 Sistina Software (UK) Limited.
|
|
*
|
|
* This file is released under the LGPL.
|
|
*/
|
|
|
|
#include "metadata.h"
|
|
#include "activate.h"
|
|
#include "ll-activate.h"
|
|
#include "display.h"
|
|
#include "log.h"
|
|
#include "fs.h"
|
|
#include "lvm-string.h"
|
|
#include "names.h"
|
|
|
|
#include <limits.h>
|
|
#include <linux/kdev_t.h>
|
|
|
|
#define _skip(fmt, args...) log_very_verbose("Skipping: " fmt , ## args)
|
|
|
|
int library_version(char *version, size_t size)
|
|
{
|
|
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;
|
|
|
|
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;
|
|
}
|
|
|
|
static int _query(struct logical_volume *lv, int (*fn)(const char *))
|
|
{
|
|
char buffer[128];
|
|
|
|
if (!build_dm_name(buffer, sizeof(buffer), "",
|
|
lv->vg->name, lv->name)) {
|
|
stack;
|
|
return -1;
|
|
}
|
|
|
|
return fn(buffer);
|
|
}
|
|
|
|
|
|
/*
|
|
* These three functions return the number of LVs in the state,
|
|
* or -1 on error.
|
|
*/
|
|
int lv_active(struct logical_volume *lv)
|
|
{
|
|
return _query(lv, device_active);
|
|
}
|
|
|
|
int lv_suspended(struct logical_volume *lv)
|
|
{
|
|
return _query(lv, device_suspended);
|
|
}
|
|
|
|
int lv_open_count(struct logical_volume *lv)
|
|
{
|
|
return _query(lv, device_open_count);
|
|
}
|
|
|
|
|
|
/*
|
|
* Returns 1 if info structure populated, else 0 on failure.
|
|
*/
|
|
int lv_info(struct logical_volume *lv, struct dm_info *info)
|
|
{
|
|
char buffer[128];
|
|
|
|
if (!build_dm_name(buffer, sizeof(buffer), "",
|
|
lv->vg->name, lv->name)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
return device_info(buffer, info);
|
|
}
|
|
|
|
static inline int _read_only_lv(struct logical_volume *lv)
|
|
{
|
|
return (lv->status & LVM_WRITE) && (lv->vg->status & LVM_WRITE);
|
|
}
|
|
|
|
int lv_activate(struct logical_volume *lv)
|
|
{
|
|
int r = 0;
|
|
struct dm_task *dmt;
|
|
char buffer[128];
|
|
|
|
if (test_mode()) {
|
|
_skip("Activation of '%s'.", lv->name);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Decide what we're going to call this device.
|
|
*/
|
|
if (!build_dm_name(buffer, sizeof(buffer), "",
|
|
lv->vg->name, lv->name)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Create a task.
|
|
*/
|
|
if (!(dmt = setup_dm_task(buffer, DM_DEVICE_CREATE))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Populate it.
|
|
*/
|
|
if (!device_populate_lv(dmt, lv)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Do we want a specific minor number ?
|
|
*/
|
|
if (lv->minor >= 0) {
|
|
if (!dm_task_set_minor(dmt, MINOR(lv->minor))) {
|
|
log_error("Failed to set minor number for %s to %d "
|
|
"during activation.", lv->name, lv->minor);
|
|
goto out;
|
|
} else
|
|
log_very_verbose("Set minor number for %s to %d.",
|
|
lv->name, lv->minor);
|
|
}
|
|
|
|
/*
|
|
* Read only ?
|
|
*/
|
|
if (!_read_only_lv(lv)) {
|
|
if (!dm_task_set_ro(dmt)) {
|
|
log_error("Failed to set %s read-only during "
|
|
"activation.", lv->name);
|
|
goto out;
|
|
} else
|
|
log_very_verbose("Activating %s read-only", lv->name);
|
|
}
|
|
|
|
/*
|
|
* Load this into the kernel.
|
|
*/
|
|
if (!(r = dm_task_run(dmt))) {
|
|
log_err("Activation failed.");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Create device nodes and symbolic links.
|
|
*/
|
|
if (!fs_add_lv(lv, lv->minor))
|
|
stack;
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
log_verbose("Logical volume %s%s activated", lv->name,
|
|
r == 1 ? "" : " not");
|
|
return r;
|
|
}
|
|
|
|
static int _reload(const char *name, struct logical_volume *lv)
|
|
{
|
|
int r = 0;
|
|
struct dm_task *dmt;
|
|
|
|
/*
|
|
* Create a task.
|
|
*/
|
|
if (!(dmt = setup_dm_task(name, DM_DEVICE_RELOAD))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Populate it.
|
|
*/
|
|
if (!device_populate_lv(dmt, lv)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Load this into the kernel.
|
|
*/
|
|
if (!(r = dm_task_run(dmt))) {
|
|
log_err("Activation failed.");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Create device nodes and symbolic links.
|
|
*/
|
|
if (!fs_add_lv(lv, lv->minor))
|
|
stack;
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
log_verbose("Logical volume %s%s re-activated", lv->name,
|
|
r == 1 ? "" : " not");
|
|
return r;
|
|
}
|
|
|
|
int lv_reactivate(struct logical_volume *lv)
|
|
{
|
|
int r;
|
|
char buffer[128];
|
|
|
|
if (test_mode()) {
|
|
_skip("Reactivation of '%s'.", lv->name);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Decide what we're going to call this device.
|
|
*/
|
|
if (!build_dm_name(buffer, sizeof(buffer), "",
|
|
lv->vg->name, lv->name)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Suspend the device if it isn't already.
|
|
*/
|
|
if (!device_suspended(buffer) && !device_suspend(buffer)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
r = _reload(buffer, lv);
|
|
|
|
if (!device_resume(buffer)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int lv_deactivate(struct logical_volume *lv)
|
|
{
|
|
char buffer[128];
|
|
|
|
log_very_verbose("Deactivating %s", lv->name);
|
|
if (test_mode()) {
|
|
_skip("Deactivating '%s'.", lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!build_dm_name(buffer, sizeof(buffer), "",
|
|
lv->vg->name, lv->name)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!device_deactivate(buffer)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
fs_del_lv(lv);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int lv_suspend(struct logical_volume *lv)
|
|
{
|
|
char buffer[128];
|
|
|
|
log_very_verbose("Suspending %s", lv->name);
|
|
if (test_mode()) {
|
|
_skip("Suspending '%s'.", lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!build_dm_name(buffer, sizeof(buffer), "",
|
|
lv->vg->name, lv->name)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!device_suspend(buffer)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
fs_del_lv(lv);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int lv_rename(const char *old_name, struct logical_volume *lv)
|
|
{
|
|
int r = 0;
|
|
char new_name[PATH_MAX];
|
|
struct dm_task *dmt;
|
|
|
|
if (test_mode()) {
|
|
_skip("Rename '%s' to '%s'.", old_name, lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!(dmt = setup_dm_task(old_name, DM_DEVICE_RENAME))) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!build_dm_name(new_name, sizeof(new_name), "",
|
|
lv->vg->name, lv->name)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_newname(dmt, new_name)) {
|
|
stack;
|
|
r = 0;
|
|
goto end;
|
|
}
|
|
|
|
if (!dm_task_run(dmt)) {
|
|
stack;
|
|
r = 0;
|
|
goto end;
|
|
}
|
|
|
|
fs_rename_lv(old_name, lv);
|
|
|
|
end:
|
|
dm_task_destroy(dmt);
|
|
return r;
|
|
}
|
|
|
|
|
|
int activate_lvs_in_vg(struct volume_group *vg)
|
|
{
|
|
struct list *lvh;
|
|
struct logical_volume *lv;
|
|
int count = 0;
|
|
|
|
list_iterate(lvh, &vg->lvs) {
|
|
lv = list_item(lvh, struct lv_list)->lv;
|
|
count += (!lv_active(lv) && lv_activate(lv));
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
int lv_update_write_access(struct logical_volume *lv)
|
|
{
|
|
struct dm_info info;
|
|
|
|
if (!lv_info(lv, &info)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (!info.exists || info.suspended)
|
|
/* Noop */
|
|
return 1;
|
|
|
|
return lv_reactivate(lv);
|
|
}
|
|
|
|
int deactivate_lvs_in_vg(struct volume_group *vg)
|
|
{
|
|
struct list *lvh;
|
|
struct logical_volume *lv;
|
|
int count = 0;
|
|
|
|
list_iterate(lvh, &vg->lvs) {
|
|
lv = list_item(lvh, struct lv_list)->lv;
|
|
count += ((lv_active(lv) == 1) && lv_deactivate(lv));
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
int lvs_in_vg_activated(struct volume_group *vg)
|
|
{
|
|
struct list *lvh;
|
|
struct logical_volume *lv;
|
|
int count = 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;
|
|
|
|
list_iterate(lvh, &vg->lvs) {
|
|
lv = list_item(lvh, struct lv_list)->lv;
|
|
count += (lv_open_count(lv) == 1);
|
|
}
|
|
|
|
return count;
|
|
}
|