diff options
| -rw-r--r-- | fs/btrfs/ordered-data.c | 25 | ||||
| -rw-r--r-- | fs/btrfs/ordered-data.h | 1 |
2 files changed, 26 insertions, 0 deletions
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 40a364c11178..e54f8280031f 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -1062,6 +1062,31 @@ void btrfs_lock_and_flush_ordered_range(struct btrfs_inode *inode, u64 start, } } +/* + * Lock the passed range and ensure all pending ordered extents in it are run + * to completion in nowait mode. + * + * Return true if btrfs_lock_ordered_range does not return any extents, + * otherwise false. + */ +bool btrfs_try_lock_ordered_range(struct btrfs_inode *inode, u64 start, u64 end) +{ + struct btrfs_ordered_extent *ordered; + + if (!try_lock_extent(&inode->io_tree, start, end)) + return false; + + ordered = btrfs_lookup_ordered_range(inode, start, end - start + 1); + if (!ordered) + return true; + + btrfs_put_ordered_extent(ordered); + unlock_extent(&inode->io_tree, start, end, NULL); + + return false; +} + + static int clone_ordered_extent(struct btrfs_ordered_extent *ordered, u64 pos, u64 len) { diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index ac6b8ef133aa..f59f2dbdb25e 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -206,6 +206,7 @@ void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr, void btrfs_lock_and_flush_ordered_range(struct btrfs_inode *inode, u64 start, u64 end, struct extent_state **cached_state); +bool btrfs_try_lock_ordered_range(struct btrfs_inode *inode, u64 start, u64 end); int btrfs_split_ordered_extent(struct btrfs_ordered_extent *ordered, u64 pre, u64 post); int __init ordered_data_init(void); |