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[v2,06/21] btrfs: return -EUCLEAN for delayed tree ref with a ref count not equals to 1

Message ID 55ab327daf38130664d2a4558a14dc1b04a76d2a.1694192469.git.fdmanana@suse.com (mailing list archive)
State New, archived
Headers show
Series btrfs: updates to delayed refs accounting and space reservation | expand

Commit Message

Filipe Manana Sept. 8, 2023, 5:20 p.m. UTC 
From: Filipe Manana <fdmanana@suse.com>

When running a delayed tree reference, if we find a ref count different
from 1, we return -EIO. This isn't an IO error, as it indicates either a
bug in the delayed refs code or a memory corruption, so change the error
code from -EIO to -EUCLEAN. Also tag the branch as 'unlikely' as this is
not expected to ever happen, and change the error message to print the
tree block's bytenr without the parenthesis (and there was a missing space
between the 'block' word and the opening parenthesis), for consistency as
that's the style we used everywhere else.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
---
 fs/btrfs/extent-tree.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
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Patch

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 929fbb620d68..8fca9c2b8917 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1699,12 +1699,12 @@  static int run_delayed_tree_ref(struct btrfs_trans_handle *trans,
 		parent = ref->parent;
 	ref_root = ref->root;
 
-	if (node->ref_mod != 1) {
+	if (unlikely(node->ref_mod != 1)) {
 		btrfs_err(trans->fs_info,
-	"btree block(%llu) has %d references rather than 1: action %d ref_root %llu parent %llu",
+	"btree block %llu has %d references rather than 1: action %d ref_root %llu parent %llu",
 			  node->bytenr, node->ref_mod, node->action, ref_root,
 			  parent);
-		return -EIO;
+		return -EUCLEAN;
 	}
 	if (node->action == BTRFS_ADD_DELAYED_REF && insert_reserved) {
 		BUG_ON(!extent_op || !extent_op->update_flags);