ext4: move __ext4_check_blockref to block_validity.c

In preparation for moving the indirect functions to a separate file,
move __ext4_check_blockref() to block_validity.c and rename it to
ext4_check_blockref() which is exported as globally visible function.

Also, rename the cpp macro ext4_check_inode_blockref() to
ext4_ind_check_inode(), to make it clear that it is only valid for use
with non-extent mapped inodes.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 8532dd43d320..82ba7eb7c4a5 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2125,6 +2125,19 @@ static inline void ext4_mark_super_dirty(struct super_block *sb)
 }
 
 /*
+ * Block validity checking
+ */
+#define ext4_check_indirect_blockref(inode, bh)                         \
+        ext4_check_blockref(__func__, __LINE__, inode,                  \
+                            (__le32 *)(bh)->b_data,                     \
+                            EXT4_ADDR_PER_BLOCK((inode)->i_sb))
+
+#define ext4_ind_check_inode(inode)                                     \
+        ext4_check_blockref(__func__, __LINE__, inode,                  \
+                            EXT4_I(inode)->i_data,                      \
+                            EXT4_NDIR_BLOCKS)
+
+/*
  * Inodes and files operations
  */
 
@@ -2153,6 +2166,8 @@ extern void ext4_exit_system_zone(void);
 extern int ext4_data_block_valid(struct ext4_sb_info *sbi,
                                  ext4_fsblk_t start_blk,
                                  unsigned int count);
+extern int ext4_check_blockref(const char *, unsigned int,
+                               struct inode *, __le32 *, unsigned int);
 
 /* extents.c */
 extern int ext4_ext_tree_init(handle_t *handle, struct inode *);