Deduplicate the ext4 file type conversion implementation - file systems
that use the same file types as defined by POSIX do not need to define
their own versions and can use the common helper functions decared in
fs_types.h and implemented in fs_types.c
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
Signed-off-by: Phillip Potter <phil@xxxxxxxxxxxxxxxx>
---
fs/ext4/ext4.h | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 3f89d0ab08fc..c45d701ba4f4 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2357,16 +2357,13 @@ static inline void ext4_update_dx_flag(struct inode *inode)
if (!ext4_has_feature_dir_index(inode->i_sb))
ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
}
-static const unsigned char ext4_filetype_table[] = {
- DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
-};
static inline unsigned char get_dtype(struct super_block *sb, int filetype)
{
- if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX)
+ if (!ext4_has_feature_filetype(sb))
return DT_UNKNOWN;
- return ext4_filetype_table[filetype];
+ return fs_ftype_to_dtype(filetype);
}
extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh,
void *buf, int buf_size);
@@ -3052,22 +3049,26 @@ extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
extern int ext4_handle_dirty_dirent_node(handle_t *handle,
struct inode *inode,
struct buffer_head *bh);
-#define S_SHIFT 12
-static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = {
- [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE,
- [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR,
- [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV,
- [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV,
- [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO,
- [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK,
- [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK,
-};
static inline void ext4_set_de_type(struct super_block *sb,
struct ext4_dir_entry_2 *de,
umode_t mode) {
+ /*
+ * compile-time asserts that generic FT_x types still match
+ * EXT4_FT_x types
+ */
+ BUILD_BUG_ON(EXT4_FT_UNKNOWN != FT_UNKNOWN);
+ BUILD_BUG_ON(EXT4_FT_REG_FILE != FT_REG_FILE);
+ BUILD_BUG_ON(EXT4_FT_DIR != FT_DIR);
+ BUILD_BUG_ON(EXT4_FT_CHRDEV != FT_CHRDEV);
+ BUILD_BUG_ON(EXT4_FT_BLKDEV != FT_BLKDEV);
+ BUILD_BUG_ON(EXT4_FT_FIFO != FT_FIFO);
+ BUILD_BUG_ON(EXT4_FT_SOCK != FT_SOCK);
+ BUILD_BUG_ON(EXT4_FT_SYMLINK != FT_SYMLINK);
+ BUILD_BUG_ON(EXT4_FT_MAX != FT_MAX);
+
if (ext4_has_feature_filetype(sb))
- de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
+ de->file_type = fs_umode_to_ftype(mode);
}
/* readpages.c */
--
2.19.1
