6.8-stable review patch. If anyone has any objections, please let me know.
------------------
From: David Sterba <dsterba@xxxxxxxx>
[ Upstream commit c03c89f821e51325d0e592cf625cf5e0a26fa3a7 ]
We've had numerous attempts to let function unpin_extent_cache() return
void as it only returns 0. There are still error cases to handle so do
that, in addition to the verbose messages. The only caller
btrfs_finish_one_ordered() will now abort the transaction, previously it
let it continue which could lead to further problems.
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Stable-dep-of: 4dc1d69c2b10 ("btrfs: fix warning messages not printing interval at unpin_extent_range()")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/btrfs/extent_map.c | 10 +++++++++-
fs/btrfs/inode.c | 9 +++++++--
2 files changed, 16 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index b61099bf97a82..f170e7122e747 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -291,6 +291,10 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em)
* Called after an extent has been written to disk properly. Set the generation
* to the generation that actually added the file item to the inode so we know
* we need to sync this extent when we call fsync().
+ *
+ * Returns: 0 on success
+ * -ENOENT when the extent is not found in the tree
+ * -EUCLEAN if the found extent does not match the expected start
*/
int unpin_extent_cache(struct btrfs_inode *inode, u64 start, u64 len, u64 gen)
{
@@ -308,14 +312,18 @@ int unpin_extent_cache(struct btrfs_inode *inode, u64 start, u64 len, u64 gen)
"no extent map found for inode %llu (root %lld) when unpinning extent range [%llu, %llu), generation %llu",
btrfs_ino(inode), btrfs_root_id(inode->root),
start, len, gen);
+ ret = -ENOENT;
goto out;
}
- if (WARN_ON(em->start != start))
+ if (WARN_ON(em->start != start)) {
btrfs_warn(fs_info,
"found extent map for inode %llu (root %lld) with unexpected start offset %llu when unpinning extent range [%llu, %llu), generation %llu",
btrfs_ino(inode), btrfs_root_id(inode->root),
em->start, start, len, gen);
+ ret = -EUCLEAN;
+ goto out;
+ }
em->generation = gen;
em->flags &= ~EXTENT_FLAG_PINNED;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 8151ad5f4650b..5ceb995709b56 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3127,8 +3127,13 @@ int btrfs_finish_one_ordered(struct btrfs_ordered_extent *ordered_extent)
ordered_extent->disk_num_bytes);
}
}
- unpin_extent_cache(inode, ordered_extent->file_offset,
- ordered_extent->num_bytes, trans->transid);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, ret);
+ goto out;
+ }
+
+ ret = unpin_extent_cache(inode, ordered_extent->file_offset,
+ ordered_extent->num_bytes, trans->transid);
if (ret < 0) {
btrfs_abort_transaction(trans, ret);
goto out;
--
2.43.0
