btrfs: use common file type conversion

Deduplicate the btrfs 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

Common implementation can be found via commit:
bbe7449e2599 "fs: common implementation of file type"

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 6f5d07415dabaf8f23f158f2e5c39b4c252bd933..b16c13d51be0a8392f13a2a3b73bdbba0d67c837 100644 (file)
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -203,8 +203,6 @@ struct btrfs_inode {
        struct inode vfs_inode;
 };
 
-extern unsigned char btrfs_filetype_table[];
-
 static inline struct btrfs_inode *BTRFS_I(const struct inode *inode)
 {
        return container_of(inode, struct btrfs_inode, vfs_inode);

diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index c669f250d4a0e27a839ed91f0c0dcd59a18dbaa4..e61947f5eb76f1581a49b614e91d86e9f769d6fb 100644 (file)
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -1692,7 +1692,7 @@ int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
                name = (char *)(di + 1);
                name_len = btrfs_stack_dir_name_len(di);
 
-               d_type = btrfs_filetype_table[di->type];
+               d_type = fs_ftype_to_dtype(di->type);
                btrfs_disk_key_to_cpu(&location, &di->location);
 
                over = !dir_emit(ctx, name, name_len,

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 4706018d1f9e3c60cba6907d2513f76ed80d4ab3..1d81a7a78a3ffca454c7cf8d6c728cfb1c96e163 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -73,17 +73,6 @@ struct kmem_cache *btrfs_trans_handle_cachep;
 struct kmem_cache *btrfs_path_cachep;
 struct kmem_cache *btrfs_free_space_cachep;
 
-#define S_SHIFT 12
-static const unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = {
-       [S_IFREG >> S_SHIFT]    = BTRFS_FT_REG_FILE,
-       [S_IFDIR >> S_SHIFT]    = BTRFS_FT_DIR,
-       [S_IFCHR >> S_SHIFT]    = BTRFS_FT_CHRDEV,
-       [S_IFBLK >> S_SHIFT]    = BTRFS_FT_BLKDEV,
-       [S_IFIFO >> S_SHIFT]    = BTRFS_FT_FIFO,
-       [S_IFSOCK >> S_SHIFT]   = BTRFS_FT_SOCK,
-       [S_IFLNK >> S_SHIFT]    = BTRFS_FT_SYMLINK,
-};
-
 static int btrfs_setsize(struct inode *inode, struct iattr *attr);
 static int btrfs_truncate(struct inode *inode, bool skip_writeback);
 static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent);
@@ -5797,10 +5786,6 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
        return d_splice_alias(inode, dentry);
 }
 
-unsigned char btrfs_filetype_table[] = {
-       DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
-};
-
 /*
  * All this infrastructure exists because dir_emit can fault, and we are holding
  * the tree lock when doing readdir.  For now just allocate a buffer and copy
@@ -5939,7 +5924,7 @@ again:
                name_ptr = (char *)(entry + 1);
                read_extent_buffer(leaf, name_ptr, (unsigned long)(di + 1),
                                   name_len);
-               put_unaligned(btrfs_filetype_table[btrfs_dir_type(leaf, di)],
+               put_unaligned(fs_ftype_to_dtype(btrfs_dir_type(leaf, di)),
                                &entry->type);
                btrfs_dir_item_key_to_cpu(leaf, di, &location);
                put_unaligned(location.objectid, &entry->ino);
@@ -6344,7 +6329,20 @@ fail:
 
 static inline u8 btrfs_inode_type(struct inode *inode)
 {
-       return btrfs_type_by_mode[(inode->i_mode & S_IFMT) >> S_SHIFT];
+       /*
+        * Compile-time asserts that generic FT_* types still match
+        * BTRFS_FT_* types
+        */
+       BUILD_BUG_ON(BTRFS_FT_UNKNOWN != FT_UNKNOWN);
+       BUILD_BUG_ON(BTRFS_FT_REG_FILE != FT_REG_FILE);
+       BUILD_BUG_ON(BTRFS_FT_DIR != FT_DIR);
+       BUILD_BUG_ON(BTRFS_FT_CHRDEV != FT_CHRDEV);
+       BUILD_BUG_ON(BTRFS_FT_BLKDEV != FT_BLKDEV);
+       BUILD_BUG_ON(BTRFS_FT_FIFO != FT_FIFO);
+       BUILD_BUG_ON(BTRFS_FT_SOCK != FT_SOCK);
+       BUILD_BUG_ON(BTRFS_FT_SYMLINK != FT_SYMLINK);
+
+       return fs_umode_to_ftype(inode->i_mode);
 }
 
 /*

diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
index e974f4bb53786e0a797676c0cf1ccf3185a9beed..421239b98db2c79e9a9e3fe57c5013716af43603 100644 (file)
--- a/include/uapi/linux/btrfs_tree.h
+++ b/include/uapi/linux/btrfs_tree.h
@@ -307,6 +307,8 @@
  *
  * Used by:
  * struct btrfs_dir_item.type
+ *
+ * Values 0..7 must match common file type values in fs_types.h.
  */
 #define BTRFS_FT_UNKNOWN       0
 #define BTRFS_FT_REG_FILE      1