diff options
| author | NeilBrown <neilb@suse.de> | 2014-05-28 13:39:21 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2014-05-29 16:59:30 +1000 |
| commit | bd8839e03b8e70fbbe08bbff70d8cba95273c823 (patch) | |
| tree | 29419f9639907eabb74e527fd3ed71bc08a122e9 | |
| parent | 2ac295a544dcae9299cba13ce250419117ae7fd1 (diff) | |
| download | linux-bd8839e03b8e70fbbe08bbff70d8cba95273c823.tar.bz2 | |
md: refuse to change shape of array if it is active but read-only
read-only arrays should not be changed. This includes changing
the level, layout, size, or number of devices.
So reject those changes for readonly arrays.
Signed-off-by: NeilBrown <neilb@suse.de>
| -rw-r--r-- | drivers/md/md.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 2382cfc9bb3f..0ddf38988fbc 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3448,6 +3448,8 @@ level_store(struct mddev *mddev, const char *buf, size_t len) mddev->level = LEVEL_NONE; return rv; } + if (mddev->ro) + return -EROFS; /* request to change the personality. Need to ensure: * - array is not engaged in resync/recovery/reshape @@ -3634,6 +3636,8 @@ layout_store(struct mddev *mddev, const char *buf, size_t len) int err; if (mddev->pers->check_reshape == NULL) return -EBUSY; + if (mddev->ro) + return -EROFS; mddev->new_layout = n; err = mddev->pers->check_reshape(mddev); if (err) { @@ -3723,6 +3727,8 @@ chunk_size_store(struct mddev *mddev, const char *buf, size_t len) int err; if (mddev->pers->check_reshape == NULL) return -EBUSY; + if (mddev->ro) + return -EROFS; mddev->new_chunk_sectors = n >> 9; err = mddev->pers->check_reshape(mddev); if (err) { @@ -6135,6 +6141,8 @@ static int update_size(struct mddev *mddev, sector_t num_sectors) */ if (mddev->sync_thread) return -EBUSY; + if (mddev->ro) + return -EROFS; rdev_for_each(rdev, mddev) { sector_t avail = rdev->sectors; @@ -6157,6 +6165,8 @@ static int update_raid_disks(struct mddev *mddev, int raid_disks) /* change the number of raid disks */ if (mddev->pers->check_reshape == NULL) return -EINVAL; + if (mddev->ro) + return -EROFS; if (raid_disks <= 0 || (mddev->max_disks && raid_disks >= mddev->max_disks)) return -EINVAL; |