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[62.64.249.96]) by smtp.gmail.com with ESMTPSA id y8sm1903282wmg.13.2018.11.21.11.07.07 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 21 Nov 2018 11:07:07 -0800 (PST) Date: Wed, 21 Nov 2018 19:07:06 +0000 From: Phillip Potter To: clm@fb.com Cc: amir73il@gmail.com, viro@zeniv.linux.org.uk, jbacik@fb.com, dsterba@suse.com, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org Subject: [RFC][PATCH v4 09/09] btrfs: use common file type conversion Message-ID: <20181121190706.GA7745@pathfinder> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Acked-by: David Sterba Signed-off-by: Amir Goldstein Signed-off-by: Phillip Potter Reviewed-by: Jan Kara --- fs/btrfs/btrfs_inode.h | 2 -- fs/btrfs/delayed-inode.c | 2 +- fs/btrfs/inode.c | 32 +++++++++++++++----------------- include/uapi/linux/btrfs_tree.h | 2 ++ 4 files changed, 18 insertions(+), 20 deletions(-) diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index 97d91e55b70a..bb01c804485f 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -196,8 +196,6 @@ 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 c669f250d4a0..e61947f5eb76 100644 --- 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 9ea4c6f0352f..8b7b1b29e2ad 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -72,17 +72,6 @@ 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); @@ -5793,10 +5782,6 @@ 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 @@ -5935,7 +5920,7 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx) 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); @@ -6340,7 +6325,20 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, 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_x types still match + * BTRFS_FT_x 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 aff1356c2bb8..4126ed7ee89a 100644 --- 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