ext4: factor out ext4_free_ext_path()

Factor out ext4_free_ext_path() to free extent path. As after previous patch
'ext4_ext_drop_refs()' is only used in 'extents.c', so make it static.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220924021211.3831551-3-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

1 files changed, 44 insertions, 63 deletions

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 5235974126bd..f1956288307f 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -106,6 +106,25 @@ static int ext4_ext_trunc_restart_fn(struct inode *inode, int *dropped)
 	return 0;
 }
 
+static void ext4_ext_drop_refs(struct ext4_ext_path *path)
+{
+	int depth, i;
+
+	if (!path)
+		return;
+	depth = path->p_depth;
+	for (i = 0; i <= depth; i++, path++) {
+		brelse(path->p_bh);
+		path->p_bh = NULL;
+	}
+}
+
+void ext4_free_ext_path(struct ext4_ext_path *path)
+{
+	ext4_ext_drop_refs(path);
+	kfree(path);
+}
+
 /*
  * Make sure 'handle' has at least 'check_cred' credits. If not, restart
  * transaction with 'restart_cred' credits. The function drops i_data_sem
@@ -636,8 +655,7 @@ int ext4_ext_precache(struct inode *inode)
 	ext4_set_inode_state(inode, EXT4_STATE_EXT_PRECACHED);
 out:
 	up_read(&ei->i_data_sem);
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 	return ret;
 }
 
@@ -724,19 +742,6 @@ static void ext4_ext_show_move(struct inode *inode, struct ext4_ext_path *path,
 #define ext4_ext_show_move(inode, path, newblock, level)
 #endif
 
-void ext4_ext_drop_refs(struct ext4_ext_path *path)
-{
-	int depth, i;
-
-	if (!path)
-		return;
-	depth = path->p_depth;
-	for (i = 0; i <= depth; i++, path++) {
-		brelse(path->p_bh);
-		path->p_bh = NULL;
-	}
-}
-
 /*
  * ext4_ext_binsearch_idx:
  * binary search for the closest index of the given block
@@ -955,8 +960,7 @@ ext4_find_extent(struct inode *inode, ext4_lblk_t block,
 	return path;
 
 err:
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 	if (orig_path)
 		*orig_path = NULL;
 	return ERR_PTR(ret);
@@ -2174,8 +2178,7 @@ merge:
 	err = ext4_ext_dirty(handle, inode, path + path->p_depth);
 
 cleanup:
-	ext4_ext_drop_refs(npath);
-	kfree(npath);
+	ext4_free_ext_path(npath);
 	return err;
 }
 
@@ -3061,8 +3064,7 @@ again:
 		}
 	}
 out:
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 	path = NULL;
 	if (err == -EAGAIN)
 		goto again;
@@ -4375,8 +4377,7 @@ got_allocated_blocks:
 	allocated = map->m_len;
 	ext4_ext_show_leaf(inode, path);
 out:
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 
 	trace_ext4_ext_map_blocks_exit(inode, flags, map,
 				       err ? err : allocated);
@@ -5245,8 +5246,7 @@ again:
 			break;
 	}
 out:
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 	return ret;
 }
 
@@ -5538,15 +5538,13 @@ static int ext4_insert_range(struct file *file, loff_t offset, loff_t len)
 					EXT4_GET_BLOCKS_METADATA_NOFAIL);
 		}
 
-		ext4_ext_drop_refs(path);
-		kfree(path);
+		ext4_free_ext_path(path);
 		if (ret < 0) {
 			up_write(&EXT4_I(inode)->i_data_sem);
 			goto out_stop;
 		}
 	} else {
-		ext4_ext_drop_refs(path);
-		kfree(path);
+		ext4_free_ext_path(path);
 	}
 
 	ret = ext4_es_remove_extent(inode, offset_lblk,
@@ -5766,10 +5764,8 @@ ext4_swap_extents(handle_t *handle, struct inode *inode1,
 		count -= len;
 
 	repeat:
-		ext4_ext_drop_refs(path1);
-		kfree(path1);
-		ext4_ext_drop_refs(path2);
-		kfree(path2);
+		ext4_free_ext_path(path1);
+		ext4_free_ext_path(path2);
 		path1 = path2 = NULL;
 	}
 	return replaced_count;
@@ -5848,8 +5844,7 @@ int ext4_clu_mapped(struct inode *inode, ext4_lblk_t lclu)
 	}
 
 out:
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 
 	return err ? err : mapped;
 }
@@ -5916,8 +5911,7 @@ int ext4_ext_replay_update_ex(struct inode *inode, ext4_lblk_t start,
 	ret = ext4_ext_dirty(NULL, inode, &path[path->p_depth]);
 	up_write(&EXT4_I(inode)->i_data_sem);
 out:
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 	ext4_mark_inode_dirty(NULL, inode);
 	return ret;
 }
@@ -5935,8 +5929,7 @@ void ext4_ext_replay_shrink_inode(struct inode *inode, ext4_lblk_t end)
 			return;
 		ex = path[path->p_depth].p_ext;
 		if (!ex) {
-			ext4_ext_drop_refs(path);
-			kfree(path);
+			ext4_free_ext_path(path);
 			ext4_mark_inode_dirty(NULL, inode);
 			return;
 		}
@@ -5949,8 +5942,7 @@ void ext4_ext_replay_shrink_inode(struct inode *inode, ext4_lblk_t end)
 		ext4_ext_dirty(NULL, inode, &path[path->p_depth]);
 		up_write(&EXT4_I(inode)->i_data_sem);
 		ext4_mark_inode_dirty(NULL, inode);
-		ext4_ext_drop_refs(path);
-		kfree(path);
+		ext4_free_ext_path(path);
 	}
 }
 
@@ -5989,13 +5981,11 @@ int ext4_ext_replay_set_iblocks(struct inode *inode)
 		return PTR_ERR(path);
 	ex = path[path->p_depth].p_ext;
 	if (!ex) {
-		ext4_ext_drop_refs(path);
-		kfree(path);
+		ext4_free_ext_path(path);
 		goto out;
 	}
 	end = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 
 	/* Count the number of data blocks */
 	cur = 0;
@@ -6025,30 +6015,26 @@ int ext4_ext_replay_set_iblocks(struct inode *inode)
 	if (IS_ERR(path))
 		goto out;
 	numblks += path->p_depth;
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 	while (cur < end) {
 		path = ext4_find_extent(inode, cur, NULL, 0);
 		if (IS_ERR(path))
 			break;
 		ex = path[path->p_depth].p_ext;
 		if (!ex) {
-			ext4_ext_drop_refs(path);
-			kfree(path);
+			ext4_free_ext_path(path);
 			return 0;
 		}
 		cur = max(cur + 1, le32_to_cpu(ex->ee_block) +
 					ext4_ext_get_actual_len(ex));
 		ret = skip_hole(inode, &cur);
 		if (ret < 0) {
-			ext4_ext_drop_refs(path);
-			kfree(path);
+			ext4_free_ext_path(path);
 			break;
 		}
 		path2 = ext4_find_extent(inode, cur, NULL, 0);
 		if (IS_ERR(path2)) {
-			ext4_ext_drop_refs(path);
-			kfree(path);
+			ext4_free_ext_path(path);
 			break;
 		}
 		for (i = 0; i <= max(path->p_depth, path2->p_depth); i++) {
@@ -6062,10 +6048,8 @@ int ext4_ext_replay_set_iblocks(struct inode *inode)
 			if (cmp1 != cmp2 && cmp2 != 0)
 				numblks++;
 		}
-		ext4_ext_drop_refs(path);
-		ext4_ext_drop_refs(path2);
-		kfree(path);
-		kfree(path2);
+		ext4_free_ext_path(path);
+		ext4_free_ext_path(path2);
 	}
 
 out:
@@ -6092,13 +6076,11 @@ int ext4_ext_clear_bb(struct inode *inode)
 		return PTR_ERR(path);
 	ex = path[path->p_depth].p_ext;
 	if (!ex) {
-		ext4_ext_drop_refs(path);
-		kfree(path);
+		ext4_free_ext_path(path);
 		return 0;
 	}
 	end = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex);
-	ext4_ext_drop_refs(path);
-	kfree(path);
+	ext4_free_ext_path(path);
 
 	cur = 0;
 	while (cur < end) {
@@ -6117,8 +6099,7 @@ int ext4_ext_clear_bb(struct inode *inode)
 					ext4_fc_record_regions(inode->i_sb, inode->i_ino,
 							0, path[j].p_block, 1, 1);
 				}
-				ext4_ext_drop_refs(path);
-				kfree(path);
+				ext4_free_ext_path(path);
 			}
 			ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, 0);
 			ext4_fc_record_regions(inode->i_sb, inode->i_ino,