Btrfs: add fragment=* debug mount option

[karo-tx-linux.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 49bc792108b9bc9e2024fa0a29e906ce8972e796..16384231db82d8fabf5f504a070238516c57420a 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2145,6 +2145,8 @@ struct btrfs_ioctl_defrag_range_args {
 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR       (1 << 22)
 #define BTRFS_MOUNT_RESCAN_UUID_TREE   (1 << 23)
+#define BTRFS_MOUNT_FRAGMENT_DATA      (1 << 24)
+#define BTRFS_MOUNT_FRAGMENT_METADATA  (1 << 25)
 
 #define BTRFS_DEFAULT_COMMIT_INTERVAL  (30)
 #define BTRFS_DEFAULT_MAX_INLINE       (8192)
@@ -2169,6 +2171,18 @@ struct btrfs_ioctl_defrag_range_args {
        btrfs_clear_opt(root->fs_info->mount_opt, opt);                 \
 }
 
+#ifdef CONFIG_BTRFS_DEBUG
+static inline int
+btrfs_should_fragment_free_space(struct btrfs_root *root,
+                                struct btrfs_block_group_cache *block_group)
+{
+       return (btrfs_test_opt(root, FRAGMENT_METADATA) &&
+               block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
+              (btrfs_test_opt(root, FRAGMENT_DATA) &&
+               block_group->flags &  BTRFS_BLOCK_GROUP_DATA);
+}
+#endif
+
 /*
  * Requests for changes that need to be done during transaction commit.
  *