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authorTao Ma <boyu.mt@taobao.com>2012-12-10 14:06:00 -0500
committerTheodore Ts'o <tytso@mit.edu>2012-12-10 14:06:00 -0500
commite8e948e7802a2ab05c146d3e72a39b93b5718236 (patch)
tree3e6914f6b16c457e0d14cee75bf0149f730bbd99 /fs/ext4/inline.c
parent7335cd3b41b1e704608ca46159641ca9cb598121 (diff)
downloadop-kernel-dev-e8e948e7802a2ab05c146d3e72a39b93b5718236.zip
op-kernel-dev-e8e948e7802a2ab05c146d3e72a39b93b5718236.tar.gz
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>
Diffstat (limited to 'fs/ext4/inline.c')
-rw-r--r--fs/ext4/inline.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 4715041..0a8f5a8 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;
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