[PATCH V6 13/23] ext4: Create a new function search_dir.
From: Tao Ma <hidden>
Date: 2012-09-14 11:34:09
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
From: Tao Ma <redacted> search_dirblock is used to search a dir block, but the code is almost the same for searching an inline dir. So create a new fuction search_dir and let search_dirblock call it. Signed-off-by: Tao Ma <redacted> --- fs/ext4/ext4.h | 7 +++++++ fs/ext4/namei.c | 26 +++++++++++++++++++------- 2 files changed, 26 insertions(+), 7 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index c7cd07e..c91116c 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h@@ -2088,6 +2088,13 @@ extern int ext4_orphan_add(handle_t *, struct inode *); extern int ext4_orphan_del(handle_t *, struct inode *); extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, __u32 start_minor_hash, __u32 *next_hash); +extern int search_dir(struct buffer_head *bh, + char *search_buf, + int buf_size, + struct inode *dir, + const struct qstr *d_name, + unsigned int offset, + struct ext4_dir_entry_2 **res_dir); /* resize.c */ extern int ext4_group_add(struct super_block *sb,
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 9491ecc..d3fc040 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c@@ -1063,11 +1063,13 @@ static inline int ext4_match (int len, const char * const name, /* * Returns 0 if not found, -1 on failure, and 1 on success */ -static inline int search_dirblock(struct buffer_head *bh, - struct inode *dir, - const struct qstr *d_name, - unsigned int offset, - struct ext4_dir_entry_2 ** res_dir) +int search_dir(struct buffer_head *bh, + char *search_buf, + int buf_size, + struct inode *dir, + const struct qstr *d_name, + unsigned int offset, + struct ext4_dir_entry_2 **res_dir) { struct ext4_dir_entry_2 * de; char * dlimit;
@@ -1075,8 +1077,8 @@ static inline int search_dirblock(struct buffer_head *bh, const char *name = d_name->name; int namelen = d_name->len; - de = (struct ext4_dir_entry_2 *) bh->b_data; - dlimit = bh->b_data + dir->i_sb->s_blocksize; + de = (struct ext4_dir_entry_2 *)search_buf; + dlimit = search_buf + buf_size; while ((char *) de < dlimit) { /* this code is executed quadratically often */ /* do minimal checking `by hand' */
@@ -1101,6 +1103,16 @@ static inline int search_dirblock(struct buffer_head *bh, return 0; } +static inline int search_dirblock(struct buffer_head *bh, + struct inode *dir, + const struct qstr *d_name, + unsigned int offset, + struct ext4_dir_entry_2 **res_dir) +{ + return search_dir(bh, bh->b_data, dir->i_sb->s_blocksize, dir, + d_name, offset, res_dir); +} + /* * ext4_find_entry()
--
1.7.1