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authorNeilBrown <neilb@suse.de>2014-05-28 13:39:21 +1000
committerNeilBrown <neilb@suse.de>2014-05-29 16:59:30 +1000
commitbd8839e03b8e70fbbe08bbff70d8cba95273c823 (patch)
tree29419f9639907eabb74e527fd3ed71bc08a122e9 /drivers/md/md.c
parent2ac295a544dcae9299cba13ce250419117ae7fd1 (diff)
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>
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c10
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;