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btrfs: handle errors returned from unpin_extent_cache()

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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@suse.com>
This commit is contained in:
David Sterba 2024-01-12 18:31:40 +01:00
parent 835cd82649
commit c03c89f821
2 changed files with 16 additions and 3 deletions
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10
fs/btrfs/extent_map.c
View file

@ -290,6 +290,10 @@ 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 * 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 * 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(). * 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) int unpin_extent_cache(struct btrfs_inode *inode, u64 start, u64 len, u64 gen)
{ {
@ -307,14 +311,18 @@ 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", "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), btrfs_ino(inode), btrfs_root_id(inode->root),
start, len, gen); start, len, gen);
ret = -ENOENT;
goto out; goto out;
} }
if (WARN_ON(em->start != start)) if (WARN_ON(em->start != start)) {
btrfs_warn(fs_info, 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", "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), btrfs_ino(inode), btrfs_root_id(inode->root),
em->start, start, len, gen); em->start, start, len, gen);
ret = -EUCLEAN;
goto out;
}
em->generation = gen; em->generation = gen;
em->flags &= ~EXTENT_FLAG_PINNED; em->flags &= ~EXTENT_FLAG_PINNED;

9
fs/btrfs/inode.c
View file

@ -3125,8 +3125,13 @@ int btrfs_finish_one_ordered(struct btrfs_ordered_extent *ordered_extent)
ordered_extent->disk_num_bytes); ordered_extent->disk_num_bytes);
} }
} }
unpin_extent_cache(inode, ordered_extent->file_offset, if (ret < 0) {
ordered_extent->num_bytes, trans->transid); 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) { if (ret < 0) {
btrfs_abort_transaction(trans, ret); btrfs_abort_transaction(trans, ret);
goto out; goto out;