Deduplicate the nilfs2 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/nilfs2/dir.c | 52 ++++++++++-------------------- include/uapi/linux/nilfs2_ondisk.h | 1 + 2 files changed, 18 insertions(+), 35 deletions(-) diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c index 81394e22d0a0..278d80d434b4 100644 --- a/fs/nilfs2/dir.c +++ b/fs/nilfs2/dir.c @@ -229,35 +229,23 @@ static struct nilfs_dir_entry *nilfs_next_entry(struct nilfs_dir_entry *p) nilfs_rec_len_from_disk(p->rec_len)); } -static unsigned char -nilfs_filetype_table[NILFS_FT_MAX] = { - [NILFS_FT_UNKNOWN] = DT_UNKNOWN, - [NILFS_FT_REG_FILE] = DT_REG, - [NILFS_FT_DIR] = DT_DIR, - [NILFS_FT_CHRDEV] = DT_CHR, - [NILFS_FT_BLKDEV] = DT_BLK, - [NILFS_FT_FIFO] = DT_FIFO, - [NILFS_FT_SOCK] = DT_SOCK, - [NILFS_FT_SYMLINK] = DT_LNK, -}; - -#define S_SHIFT 12 -static unsigned char -nilfs_type_by_mode[S_IFMT >> S_SHIFT] = { - [S_IFREG >> S_SHIFT] = NILFS_FT_REG_FILE, - [S_IFDIR >> S_SHIFT] = NILFS_FT_DIR, - [S_IFCHR >> S_SHIFT] = NILFS_FT_CHRDEV, - [S_IFBLK >> S_SHIFT] = NILFS_FT_BLKDEV, - [S_IFIFO >> S_SHIFT] = NILFS_FT_FIFO, - [S_IFSOCK >> S_SHIFT] = NILFS_FT_SOCK, - [S_IFLNK >> S_SHIFT] = NILFS_FT_SYMLINK, -}; - static void nilfs_set_de_type(struct nilfs_dir_entry *de, struct inode *inode) { - umode_t mode = inode->i_mode; - - de->file_type = nilfs_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; + /* + * compile-time asserts that generic FT_x types still match + * NILFS_FT_x types + */ + BUILD_BUG_ON(NILFS_FT_UNKNOWN != FT_UNKNOWN); + BUILD_BUG_ON(NILFS_FT_REG_FILE != FT_REG_FILE); + BUILD_BUG_ON(NILFS_FT_DIR != FT_DIR); + BUILD_BUG_ON(NILFS_FT_CHRDEV != FT_CHRDEV); + BUILD_BUG_ON(NILFS_FT_BLKDEV != FT_BLKDEV); + BUILD_BUG_ON(NILFS_FT_FIFO != FT_FIFO); + BUILD_BUG_ON(NILFS_FT_SOCK != FT_SOCK); + BUILD_BUG_ON(NILFS_FT_SYMLINK != FT_SYMLINK); + BUILD_BUG_ON(NILFS_FT_MAX != FT_MAX); + + de->file_type = fs_umode_to_ftype(inode->i_mode); } static int nilfs_readdir(struct file *file, struct dir_context *ctx) @@ -293,15 +281,9 @@ static int nilfs_readdir(struct file *file, struct dir_context *ctx) return -EIO; } if (de->inode) { - unsigned char t; - - if (de->file_type < NILFS_FT_MAX) - t = nilfs_filetype_table[de->file_type]; - else - t = DT_UNKNOWN; - if (!dir_emit(ctx, de->name, de->name_len, - le64_to_cpu(de->inode), t)) { + le64_to_cpu(de->inode), + fs_ftype_to_dtype(de->file_type))) { nilfs_put_page(page); return 0; } diff --git a/include/uapi/linux/nilfs2_ondisk.h b/include/uapi/linux/nilfs2_ondisk.h index a7e66ab11d1d..9223b616766b 100644 --- a/include/uapi/linux/nilfs2_ondisk.h +++ b/include/uapi/linux/nilfs2_ondisk.h @@ -309,6 +309,7 @@ struct nilfs_dir_entry { /* * NILFS directory file types. Only the low 3 bits are used. The * other bits are reserved for now. + * Values must match common file type values in fs_types.h. */ enum { NILFS_FT_UNKNOWN, -- 2.19.1