btrfs: Make btrfs_pin_extent take trans handle

Preparation for switching pinned extent tracking to a per-transaction
basis.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ctree.h

@@ -2463,8 +2463,8 @@ int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
 			     struct btrfs_fs_info *fs_info, u64 bytenr,
 			     u64 offset, int metadata, u64 *refs, u64 *flags);
-int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
+int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num,
-		     u64 bytenr, u64 num, int reserved);
+		     int reserved);
 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
 				    u64 bytenr, u64 num_bytes);
 int btrfs_exclude_logged_extents(struct extent_buffer *eb);

fs/btrfs/extent-tree.c

@@ -1705,8 +1705,7 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans,
 
 	if (TRANS_ABORTED(trans)) {
 		if (insert_reserved)
-			btrfs_pin_extent(trans->fs_info, node->bytenr,
+			btrfs_pin_extent(trans, node->bytenr, node->num_bytes, 1);
-					 node->num_bytes, 1);
 		return 0;
 	}
 
@@ -1721,8 +1720,7 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans,
 	else
 		BUG();
 	if (ret && insert_reserved)
-		btrfs_pin_extent(trans->fs_info, node->bytenr,
+		btrfs_pin_extent(trans, node->bytenr, node->num_bytes, 1);
-				 node->num_bytes, 1);
 	return ret;
 }
 
@@ -1867,8 +1865,7 @@ static int cleanup_ref_head(struct btrfs_trans_handle *trans,
 	spin_unlock(&delayed_refs->lock);
 
 	if (head->must_insert_reserved) {
-		btrfs_pin_extent(fs_info, head->bytenr,
+		btrfs_pin_extent(trans, head->bytenr, head->num_bytes, 1);
-				 head->num_bytes, 1);
 		if (head->is_data) {
 			ret = btrfs_del_csums(trans, fs_info->csum_root,
 					      head->bytenr, head->num_bytes);
@@ -2612,14 +2609,12 @@ static int pin_down_extent(struct btrfs_block_group *cache,
 	return 0;
 }
 
-int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
+int btrfs_pin_extent(struct btrfs_trans_handle *trans,
 		     u64 bytenr, u64 num_bytes, int reserved)
 {
 	struct btrfs_block_group *cache;
 
-	ASSERT(fs_info->running_transaction);
+	cache = btrfs_lookup_block_group(trans->fs_info, bytenr);
-
-	cache = btrfs_lookup_block_group(fs_info, bytenr);
 	BUG_ON(!cache); /* Logic error */
 
 	pin_down_extent(cache, bytenr, num_bytes, reserved);
@@ -3345,7 +3340,7 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref)
 	    (ref->type == BTRFS_REF_DATA &&
 	     ref->data_ref.ref_root == BTRFS_TREE_LOG_OBJECTID)) {
 		/* unlocks the pinned mutex */
-		btrfs_pin_extent(fs_info, ref->bytenr, ref->len, 1);
+		btrfs_pin_extent(trans, ref->bytenr, ref->len, 1);
 		old_ref_mod = new_ref_mod = 0;
 		ret = 0;
 	} else if (ref->type == BTRFS_REF_METADATA) {