From: Mark Fasheh <mfas...@suse.com>
__btrfs_cow_block(), the only caller of update_ref_for_cow() will BUG_ON()
any error return. Instead, we can go read-only fs as update_ref_for_cow()
manipulates disk data in a way which doesn't look like it's easily rolled
back.
Signed-off-by: Mark Fasheh <mfas...@suse.de>
---
fs/btrfs/ctree.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 8d8182f..31fdadf 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -482,7 +482,10 @@ static noinline int __btrfs_cow_block(struct
btrfs_trans_handle *trans,
BTRFS_FSID_SIZE);
ret = update_ref_for_cow(trans, root, buf, cow, &last_ref);
- BUG_ON(ret);
+ if (ret) {
+ btrfs_std_error(root->fs_info, ret);
+ return ret;
+ }
if (root->ref_cows)
btrfs_reloc_cow_block(trans, root, buf, cow);
--
1.7.6
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