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Subject[PATCH V3 14/21] ext4: let ext4_find_entry handle inline data.
Date
From: Tao Ma <boyu.mt@taobao.com>

Create a new ext4_find_inline_entry to handle the case
of inline data.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
---
fs/ext4/inline.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
fs/ext4/namei.c | 10 +++++++++-
fs/ext4/xattr.h | 12 ++++++++++++
3 files changed, 68 insertions(+), 1 deletions(-)

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 0a41d64..7e80416 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1327,6 +1327,53 @@ out:
return ret;
}

+struct buffer_head *ext4_find_inline_entry(struct inode *dir,
+ const struct qstr *d_name,
+ struct ext4_dir_entry_2 **res_dir,
+ int *has_inline_data)
+{
+ int ret;
+ struct ext4_iloc iloc;
+ void *inline_start;
+ int inline_size;
+
+ if (ext4_get_inode_loc(dir, &iloc))
+ return NULL;
+
+ down_read(&EXT4_I(dir)->xattr_sem);
+ if (!ext4_has_inline_data(dir)) {
+ *has_inline_data = 0;
+ goto out;
+ }
+
+ inline_start = ext4_raw_inode(&iloc)->i_block;
+ inline_size = EXT4_MIN_INLINE_DATA_SIZE;
+ ret = search_dir(iloc.bh, inline_start, inline_size,
+ dir, d_name, 0, res_dir);
+ if (ret == 1)
+ goto out_find;
+ if (ret < 0)
+ goto out;
+
+ if (ext4_get_inline_size(dir) == EXT4_MIN_INLINE_DATA_SIZE)
+ goto out;
+
+ inline_start = ext4_get_inline_xattr_pos(dir, &iloc);
+ inline_size = ext4_get_inline_size(dir) - EXT4_MIN_INLINE_DATA_SIZE;
+
+ ret = search_dir(iloc.bh, inline_start, inline_size,
+ dir, d_name, 0, res_dir);
+ if (ret == 1)
+ goto out_find;
+
+out:
+ brelse(iloc.bh);
+ iloc.bh = NULL;
+out_find:
+ up_read(&EXT4_I(dir)->xattr_sem);
+ return iloc.bh;
+}
+
int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
{
int ret;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 6e97dd2..92f7b67 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -844,7 +844,6 @@ static inline int search_dirblock(struct buffer_head *bh,
d_name, offset, res_dir);
}

-
/*
* ext4_find_entry()
*
@@ -879,6 +878,15 @@ static struct buffer_head * ext4_find_entry (struct inode *dir,
namelen = d_name->len;
if (namelen > EXT4_NAME_LEN)
return NULL;
+
+ if (ext4_has_inline_data(dir)) {
+ int has_inline_data = 1;
+ ret = ext4_find_inline_entry(dir, d_name, res_dir,
+ &has_inline_data);
+ if (has_inline_data)
+ return ret;
+ }
+
if ((namelen <= 2) && (name[0] == '.') &&
(name[1] == '.' || name[1] == '\0')) {
/*
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index e9e23ba..45f3ce9 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -168,6 +168,10 @@ extern int ext4_try_create_inline_dir(handle_t *handle,
struct inode *inode);
extern int ext4_read_inline_dir(struct file *filp,
void *dirent, filldir_t filldir);
+extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
+ const struct qstr *d_name,
+ struct ext4_dir_entry_2 **res_dir,
+ int *has_inline_data);
# else /* CONFIG_EXT4_FS_XATTR */

static inline int
@@ -350,6 +354,14 @@ static inline int ext4_read_inline_dir(struct file *filp,
{
return 0;
}
+
+struct buffer_head *ext4_find_inline_entry(struct inode *dir,
+ const struct qstr *d_name,
+ struct ext4_dir_entry_2 **res_dir,
+ int *has_inline_data)
+{
+ return NULL;
+}
# endif /* CONFIG_EXT4_FS_XATTR */

#ifdef CONFIG_EXT4_FS_SECURITY
--
1.7.0.4


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