Commit f48b9075 authored Jan 27, 2010 by Josef Bacik Committed by Chris Mason Jan 28, 2010

Btrfs: do not mark the chunk as readonly if in degraded mode

If a RAID setup has chunks that span multiple disks, and one of those
disks has failed, btrfs_chunk_readonly will return 1 since one of the
disks in that chunk's stripes is dead and therefore not writeable. So
instead if we are in degraded mode, return 0 so we can go ahead and
allocate stuff. Without this patch all of the block groups in a RAID1
setup will end up read-only, which will mean we can't add new disks to
the array since we won't be able to make allocations.

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent e3acc2a6

fs/btrfs/volumes.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -2538,6 +2538,11 @@ int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset)
		if (!em)
		return 1;

		if (btrfs_test_opt(root, DEGRADED)) {
		free_extent_map(em);
		return 0;
		}

		map = (struct map_lookup *)em->bdev;
		for (i = 0; i < map->num_stripes; i++) {
		if (!map->stripes[i].dev->writeable) {

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