btrfs: move btrfs_defrag_root() to defrag.{c,h}

The btrfs_defrag_root() function does not really belong in the
transaction.{c,h} module and as we have a defrag.{c,h} nowadays,
move it to there instead. This also allows to stop exporting
btrfs_defrag_leaves(), so we can make it static.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ rename info to fs_info for consistency ]
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/defrag.c b/fs/btrfs/defrag.c
index f2ff4cb..dde70f3 100644 (file)
--- a/fs/btrfs/defrag.c
+++ b/fs/btrfs/defrag.c
@@ -343,8 +343,8 @@ int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info)
  * better reflect disk order
  */
 
-int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
-                       struct btrfs_root *root)
+static int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
+                              struct btrfs_root *root)
 {
        struct btrfs_path *path = NULL;
        struct btrfs_key key;
@@ -460,6 +460,45 @@ done:
        return ret;
 }
 
+/*
+ * Defrag a given btree.  Every leaf in the btree is read and defragmented.
+ */
+int btrfs_defrag_root(struct btrfs_root *root)
+{
+       struct btrfs_fs_info *fs_info = root->fs_info;
+       int ret;
+
+       if (test_and_set_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state))
+               return 0;
+
+       while (1) {
+               struct btrfs_trans_handle *trans;
+
+               trans = btrfs_start_transaction(root, 0);
+               if (IS_ERR(trans)) {
+                       ret = PTR_ERR(trans);
+                       break;
+               }
+
+               ret = btrfs_defrag_leaves(trans, root);
+
+               btrfs_end_transaction(trans);
+               btrfs_btree_balance_dirty(fs_info);
+               cond_resched();
+
+               if (btrfs_fs_closing(fs_info) || ret != -EAGAIN)
+                       break;
+
+               if (btrfs_defrag_cancelled(fs_info)) {
+                       btrfs_debug(fs_info, "defrag_root cancelled");
+                       ret = -EAGAIN;
+                       break;
+               }
+       }
+       clear_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state);
+       return ret;
+}
+
 /*
  * Defrag specific helper to get an extent map.
  *

diff --git a/fs/btrfs/defrag.h b/fs/btrfs/defrag.h
index 5305f22..5a62763 100644 (file)
--- a/fs/btrfs/defrag.h
+++ b/fs/btrfs/defrag.h
@@ -12,7 +12,7 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
                           struct btrfs_inode *inode, u32 extent_thresh);
 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
-int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, struct btrfs_root *root);
+int btrfs_defrag_root(struct btrfs_root *root);
 
 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
 {

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 682acdd..77f8175 100644 (file)
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1564,45 +1564,6 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans)
        return 0;
 }
 
-/*
- * defrag a given btree.
- * Every leaf in the btree is read and defragged.
- */
-int btrfs_defrag_root(struct btrfs_root *root)
-{
-       struct btrfs_fs_info *info = root->fs_info;
-       struct btrfs_trans_handle *trans;
-       int ret;
-
-       if (test_and_set_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state))
-               return 0;
-
-       while (1) {
-               trans = btrfs_start_transaction(root, 0);
-               if (IS_ERR(trans)) {
-                       ret = PTR_ERR(trans);
-                       break;
-               }
-
-               ret = btrfs_defrag_leaves(trans, root);
-
-               btrfs_end_transaction(trans);
-               btrfs_btree_balance_dirty(info);
-               cond_resched();
-
-               if (btrfs_fs_closing(info) || ret != -EAGAIN)
-                       break;
-
-               if (btrfs_defrag_cancelled(info)) {
-                       btrfs_debug(info, "defrag_root cancelled");
-                       ret = -EAGAIN;
-                       break;
-               }
-       }
-       clear_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state);
-       return ret;
-}
-
 /*
  * Do all special snapshot related qgroup dirty hack.
  *

diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 934cadf..365c065 100644 (file)
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -246,7 +246,6 @@ struct btrfs_trans_handle *btrfs_attach_transaction_barrier(
 int btrfs_wait_for_commit(struct btrfs_fs_info *fs_info, u64 transid);
 
 void btrfs_add_dead_root(struct btrfs_root *root);
-int btrfs_defrag_root(struct btrfs_root *root);
 void btrfs_maybe_wake_unfinished_drop(struct btrfs_fs_info *fs_info);
 int btrfs_clean_one_deleted_snapshot(struct btrfs_fs_info *fs_info);
 int btrfs_commit_transaction(struct btrfs_trans_handle *trans);