From bd8839e03b8e70fbbe08bbff70d8cba95273c823 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Wed, 28 May 2014 13:39:21 +1000 Subject: 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 --- drivers/md/md.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/md/md.c') 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; -- cgit v1.2.3