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Make 'zpool labelclear -f' work on offlined disks

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This patch allows you to clear the label on offlined disks in an active
pool with `-f`.  Previously, labelclear wouldn't let you do that.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #12511
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Tony Hutter 2021-08-27 09:26:49 -07:00 committed by GitHub
parent 00888c0898
commit 4dc115328f
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 35 additions and 1 deletions
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36
cmd/zpool/zpool_main.c
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@ -1219,6 +1219,26 @@ zpool_do_remove(int argc, char **argv)
return (ret);
}
/*
* Return 1 if a vdev is active (being used in a pool)
* Return 0 if a vdev is inactive (offlined or faulted, or not in active pool)
*
* This is useful for checking if a disk in an active pool is offlined or
* faulted.
*/
static int
vdev_is_active(char *vdev_path)
{
int fd;
fd = open(vdev_path, O_EXCL);
if (fd < 0) {
return (1); /* cant open O_EXCL - disk is active */
}
close(fd);
return (0); /* disk is inactive in the pool */
}
/*
* zpool labelclear [-f] <vdev>
*
@ -1328,9 +1348,23 @@ zpool_do_labelclear(int argc, char **argv)
case POOL_STATE_ACTIVE:
case POOL_STATE_SPARE:
case POOL_STATE_L2CACHE:
/*
* We allow the user to call 'zpool offline -f'
* on an offlined disk in an active pool. We can check if
* the disk is online by calling vdev_is_active().
*/
if (force && !vdev_is_active(vdev))
break;
(void) fprintf(stderr, gettext(
"%s is a member (%s) of pool \"%s\"\n"),
"%s is a member (%s) of pool \"%s\""),
vdev, zpool_pool_state_to_name(state), name);
if (force) {
(void) fprintf(stderr, gettext(
". Offline the disk first to clear its label."));
}
printf("\n");
ret = 1;
goto errout;