Wang Shilong
2014-Feb-08 15:46 UTC
[PATCH 1/2] Btrfs: skip readonly root for snapshot-aware defragment
From: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Btrfs send is assuming readonly root won't change, let's skip readonly
root.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
---
fs/btrfs/inode.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 1af34d0..e8dfd83 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2239,6 +2239,11 @@ static noinline int relink_extent_backref(struct
btrfs_path *path,
return PTR_ERR(root);
}
+ if (btrfs_root_readonly(root)) {
+ srcu_read_unlock(&fs_info->subvol_srcu, index);
+ return 0;
+ }
+
/* step 2: get inode */
key.objectid = backref->inum;
key.type = BTRFS_INODE_ITEM_KEY;
--
1.8.4
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