ext4: fix the number of credits needed for acl ops with inline data

Operations which modify extended attributes may need extra journal
credits if inline data is used, since there is a chance that some
extended attributes may need to get pushed to an external attribute
block.

Changes to reflect this was made in xattr.c, but they were missed in
fs/ext4/acl.c.  To fix this, abstract the calculation of the number of
credits needed for xattr operations to an inline function defined in
ext4_jbd2.h, and use it in acl.c and xattr.c.

Also move the function declarations used in inline.c from xattr.h
(where they are non-obviously hidden, and caused problems since
ext4_jbd2.h needs to use the function ext4_has_inline_data), and move
them to ext4.h.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Tao Ma <boyu.mt@taobao.com>
Reviewed-by: Jan Kara <jack@suse.cz>

1 files changed, 1 insertions, 8 deletions

diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 2efc5600b03b..cc31da027596 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1165,16 +1165,9 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name,
 {
         handle_t *handle;
         int error, retries = 0;
-        int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb);
+        int credits = ext4_jbd2_credits_xattr(inode);
 
 retry:
-        /*
-         * In case of inline data, we may push out the data to a block,
-         * So reserve the journal space first.
-         */
-        if (ext4_has_inline_data(inode))
-                credits += ext4_writepage_trans_blocks(inode) + 1;
-
         handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits);
         if (IS_ERR(handle)) {
                 error = PTR_ERR(handle);