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authorChris Mason <chris.mason@oracle.com>2010-12-24 06:41:52 -0500
committerChris Mason <chris.mason@oracle.com>2011-01-04 16:41:39 -0500
commit65e5341b9a0c39767ae1fecc727d70eda0dd6d83 (patch)
tree09f54177bfb8c93b2320d84317705bec6dcc42a6 /fs/btrfs/extent-tree.c
parent83a50de97fe96aca82389e061862ed760ece2283 (diff)
Btrfs: fix off by one while setting block groups readonly
When we read in block groups, we'll set non-redundant groups readonly if we find a raid1, DUP or raid10 group. But the ro code has an off by one bug in the math around testing to make sure out accounting doesn't go wrong. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
-rw-r--r--fs/btrfs/extent-tree.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 7e5162e5c41..b180efdc8b6 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7971,13 +7971,14 @@ static int set_block_group_ro(struct btrfs_block_group_cache *cache)
if (sinfo->bytes_used + sinfo->bytes_reserved + sinfo->bytes_pinned +
sinfo->bytes_may_use + sinfo->bytes_readonly +
- cache->reserved_pinned + num_bytes < sinfo->total_bytes) {
+ cache->reserved_pinned + num_bytes <= sinfo->total_bytes) {
sinfo->bytes_readonly += num_bytes;
sinfo->bytes_reserved += cache->reserved_pinned;
cache->reserved_pinned = 0;
cache->ro = 1;
ret = 0;
}
+
spin_unlock(&cache->lock);
spin_unlock(&sinfo->lock);
return ret;