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authorChris Mason <chris.mason@oracle.com>2008-07-17 12:54:40 -0400
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:04:04 -0400
commitee6e6504e147a59a9f4d582662c105e9d72ae638 (patch)
treebe932cc04abb860ed76ab8d4c4c28353ed50bebb /fs/btrfs/btrfs_inode.h
parentba1da2f442ec91a1534afa893f9bef7e33056ace (diff)
downloadlinux-ee6e6504e147a59a9f4d582662c105e9d72ae638.tar.bz2
Add a per-inode lock around btrfs_drop_extents
btrfs_drop_extents is always called with a range lock held on the inode. But, it may operate on extents outside that range as it drops and splits them. This patch adds a per-inode mutex that is held while calling btrfs_drop_extents and while inserting new extents into the tree. It prevents races from two procs working against adjacent ranges in the tree. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/btrfs_inode.h')
-rw-r--r--fs/btrfs/btrfs_inode.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 81c0444f37b6..3bf40591742a 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -32,6 +32,7 @@ struct btrfs_inode {
struct extent_io_tree io_tree;
struct extent_io_tree io_failure_tree;
struct mutex csum_mutex;
+ struct mutex extent_mutex;
struct inode vfs_inode;
struct btrfs_ordered_inode_tree ordered_tree;