From 020009fcab2690bb6ecfdc75bcdeed1833d4c8f5 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Wed, 27 Jan 2010 02:07:59 +0000 Subject: Btrfs: do not mark the chunk as readonly if in degraded mode commit f48b90756bd834dda852ff514f2690d3175b1f44 upstream. 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 Signed-off-by: Chris Mason Acked-by: Jeff Mahoney Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/volumes.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 220dad5db017..66122bdf8bbf 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -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) { -- cgit v1.2.3