Btrfs: Metadata ENOSPC handling for tree log

Previous patches make the allocater return -ENOSPC if there is no
unreserved free metadata space. This patch updates tree log code
and various other places to propagate/handle the ENOSPC error.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 54a255065aa3..21aead39a76c 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -657,6 +657,9 @@ again:
                 goto found;
         }
         ret = PTR_ERR(item);
+        if (ret != -EFBIG && ret != -ENOENT)
+                goto fail_unlock;
+
         if (ret == -EFBIG) {
                 u32 item_size;
                 /* we found one, but it isn't big enough yet */