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Subject[PATCH V3 13/21] ext4: Create a new function search_dir.
Date
From: Tao Ma <boyu.mt@taobao.com>

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 <boyu.mt@taobao.com>
---
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 25d6e58..16efcad 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1967,6 +1967,13 @@ 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 77312dc..6e97dd2 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -794,11 +794,13 @@ 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;
@@ -806,8 +808,8 @@ 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' */
@@ -832,6 +834,16 @@ 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()
--
1.7.0.4


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