ext4: refactoring to use the unified helper ext4_quotas_off()

Rename ext4_quota_off_umount() to ext4_quotas_off(), and add type
parameter to replace open code in ext4_enable_quotas().

Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230327141630.156875-3-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

Author: LiBaokun96

fs/ext4/super.c

@@ -1165,12 +1165,12 @@ static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi)
 #ifdef CONFIG_QUOTA
 static int ext4_quota_off(struct super_block *sb, int type);
 
-static inline void ext4_quota_off_umount(struct super_block *sb)
+static inline void ext4_quotas_off(struct super_block *sb, int type)
 {
-	int type;
+	BUG_ON(type > EXT4_MAXQUOTAS);
 
 	/* Use our quota_off function to clear inode flags etc. */
-	for (type = 0; type < EXT4_MAXQUOTAS; type++)
+	for (type--; type >= 0; type--)
 		ext4_quota_off(sb, type);
 }
 
@@ -1186,7 +1186,7 @@ static inline char *get_qf_name(struct super_block *sb,
 					 lockdep_is_held(&sb->s_umount));
 }
 #else
-static inline void ext4_quota_off_umount(struct super_block *sb)
+static inline void ext4_quotas_off(struct super_block *sb, int type)
 {
 }
 #endif
@@ -1286,7 +1286,7 @@ static void ext4_put_super(struct super_block *sb)
 			 &sb->s_uuid);
 
 	ext4_unregister_li_request(sb);
-	ext4_quota_off_umount(sb);
+	ext4_quotas_off(sb, EXT4_MAXQUOTAS);
 
 	flush_work(&sbi->s_error_work);
 	destroy_workqueue(sbi->rsv_conversion_wq);
@@ -5597,7 +5597,7 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
 	return 0;
 
 failed_mount10:
-	ext4_quota_off_umount(sb);
+	ext4_quotas_off(sb, EXT4_MAXQUOTAS);
 failed_mount9: __maybe_unused
 	ext4_release_orphan_info(sb);
 failed_mount8:
@@ -7044,20 +7044,8 @@ int ext4_enable_quotas(struct super_block *sb)
 					"(type=%d, err=%d, ino=%lu). "
 					"Please run e2fsck to fix.", type,
 					err, qf_inums[type]);
-				for (type--; type >= 0; type--) {
-					struct inode *inode;
-
-					inode = sb_dqopt(sb)->files[type];
-					if (inode)
-						inode = igrab(inode);
-					dquot_quota_off(sb, type);
-					if (inode) {
-						lockdep_set_quota_inode(inode,
-							I_DATA_SEM_NORMAL);
-						iput(inode);
-					}
-				}
 
+				ext4_quotas_off(sb, type);
 				return err;
 			}
 		}