/* Convert a non-canonical LV path like /dev/mapper/vg-lv or /dev/dm-0
* to a canonical one.
*
* This is harder than it should be. A LV device like /dev/VG/LV is
* really a symlink to a device-mapper device like /dev/dm-0. However
* at the device-mapper (kernel) level, nothing is really known about
* LVM (a userspace concept). Therefore we use a convoluted method to
* determine this, by listing out known LVs and checking whether the
* rdev (major/minor) of the device we are passed matches any of them.
*
* Note use of 'stat' instead of 'lstat' so that symlinks are fully
* resolved.
*
* Returns:
* 1 = conversion was successful, path is an LV
* '*ret' is set to the updated path if 'ret' is non-NULL.
* 0 = path is not an LV
* -1 = error, reply_with_* has been called
*
*/
int
lv_canonical (const char *device, char **ret)
{
struct stat stat1, stat2;
int r = stat (device, &stat1);
if (r == -1) {
reply_with_perror ("stat: %s", device);
return -1;
}
char **lvs = do_lvs ();
if (lvs == NULL)
return -1;
size_t i;
for (i = 0; lvs[i] != NULL; ++i) {
r = stat (lvs[i], &stat2);
if (r == -1) {
reply_with_perror ("stat: %s", lvs[i]);
free_strings (lvs);
return -1;
}
if (stat1.st_rdev == stat2.st_rdev) { /* found it */
if (ret) {
*ret = strdup (lvs[i]);
if (*ret == NULL) {
reply_with_perror ("strdup");
free_strings (lvs);
return -1;
}
}
free_strings (lvs);
return 1;
}
}
/* not found */
free_strings (lvs);
return 0;
}
/* Super-dangerous command used for testing. It removes all
* LVs, VGs and PVs permanently.
*/
int
do_lvm_remove_all (void)
{
size_t i;
int r;
{
/* Remove LVs. */
CLEANUP_FREE_STRING_LIST char **xs = do_lvs ();
if (xs == NULL)
return -1;
for (i = 0; xs[i] != NULL; ++i) {
CLEANUP_FREE char *err = NULL;
/* Deactivate the LV first. On Ubuntu, lvremove '-f' option
* does not remove active LVs reliably.
*/
(void) command (NULL, NULL, str_lvm, "lvchange", "-an", xs[i], NULL);
udev_settle ();
r = command (NULL, &err, str_lvm, "lvremove", "-f", xs[i], NULL);
if (r == -1) {
reply_with_error ("lvremove: %s: %s", xs[i], err);
return -1;
}
}
}
{
/* Remove VGs. */
CLEANUP_FREE_STRING_LIST char **xs = do_vgs ();
if (xs == NULL)
return -1;
for (i = 0; xs[i] != NULL; ++i) {
CLEANUP_FREE char *err = NULL;
/* Deactivate the VG first, see note above. */
(void) command (NULL, NULL, str_lvm, "vgchange", "-an", xs[i], NULL);
udev_settle ();
r = command (NULL, &err, str_lvm, "vgremove", "-f", xs[i], NULL);
if (r == -1) {
reply_with_error ("vgremove: %s: %s", xs[i], err);
return -1;
}
}
}
{
/* Remove PVs. */
CLEANUP_FREE_STRING_LIST char **xs = do_pvs ();
if (xs == NULL)
return -1;
for (i = 0; xs[i] != NULL; ++i) {
CLEANUP_FREE char *err = NULL;
r = command (NULL, &err, str_lvm, "pvremove", "-f", xs[i], NULL);
if (r == -1) {
reply_with_error ("pvremove: %s: %s", xs[i], err);
return -1;
}
}
}
udev_settle ();
/* There, that was easy, sorry about your data. */
return 0;
}
/* Super-dangerous command used for testing. It removes all
* LVs, VGs and PVs permanently.
*/
int
do_lvm_remove_all (void)
{
char **xs;
int i, r;
char *err;
/* Remove LVs. */
xs = do_lvs ();
if (xs == NULL)
return -1;
for (i = 0; xs[i] != NULL; ++i) {
/* Deactivate the LV first. On Ubuntu, lvremove '-f' option
* does not remove active LVs reliably.
*/
(void) command (NULL, NULL, "lvm", "lvchange", "-an", xs[i], NULL);
udev_settle ();
r = command (NULL, &err, "lvm", "lvremove", "-f", xs[i], NULL);
if (r == -1) {
reply_with_error ("lvremove: %s: %s", xs[i], err);
free (err);
free_strings (xs);
return -1;
}
free (err);
}
free_strings (xs);
/* Remove VGs. */
xs = do_vgs ();
if (xs == NULL)
return -1;
for (i = 0; xs[i] != NULL; ++i) {
/* Deactivate the VG first, see note above. */
(void) command (NULL, NULL, "lvm", "vgchange", "-an", xs[i], NULL);
udev_settle ();
r = command (NULL, &err, "lvm", "vgremove", "-f", xs[i], NULL);
if (r == -1) {
reply_with_error ("vgremove: %s: %s", xs[i], err);
free (err);
free_strings (xs);
return -1;
}
free (err);
}
free_strings (xs);
/* Remove PVs. */
xs = do_pvs ();
if (xs == NULL)
return -1;
for (i = 0; xs[i] != NULL; ++i) {
r = command (NULL, &err, "lvm", "pvremove", "-f", xs[i], NULL);
if (r == -1) {
reply_with_error ("pvremove: %s: %s", xs[i], err);
free (err);
free_strings (xs);
return -1;
}
free (err);
}
free_strings (xs);
udev_settle ();
/* There, that was easy, sorry about your data. */
return 0;
}
