ext4: let ext4_find_entry handle inline data

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

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 48 insertions, 0 deletions

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 471504133c76..0a8f5a865496 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1462,6 +1462,54 @@ 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 = (void *)ext4_raw_inode(&iloc)->i_block +
+                                                EXT4_INLINE_DOTDOT_SIZE;
+        inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_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;