ocfs2: update inode fsync transaction id in ocfs2_unlink and ocfs2_link

transaction id should be updated in ocfs2_unlink and ocfs2_link. 
Otherwise, inode link will be wrong after journal replay even fsync was
called before power failure:
=======================================================================
$ touch testdir/bar
$ ln testdir/bar testdir/bar_link
$ fsync testdir/bar
$ stat -c %h $SCRATCH_MNT/testdir/bar
1
$ stat -c %h $SCRATCH_MNT/testdir/bar
1
=======================================================================

Link: https://lkml.kernel.org/r/[email protected]
Fixes: ccd979b ("[PATCH] OCFS2: The Second Oracle Cluster Filesystem")
Signed-off-by: Su Yue <[email protected]>
Reviewed-by: Joseph Qi <[email protected]>
Cc: Changwei Ge <[email protected]>
Cc: Gang He <[email protected]>
Cc: Joel Becker <[email protected]>
Cc: Jun Piao <[email protected]>
Cc: Junxiao Bi <[email protected]>
Cc: Mark Fasheh <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: Damenly

fs/ocfs2/namei.c

@@ -797,6 +797,7 @@ static int ocfs2_link(struct dentry *old_dentry,
 	ocfs2_set_links_count(fe, inode->i_nlink);
 	fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode));
 	fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode));
+	ocfs2_update_inode_fsync_trans(handle, inode, 0);
 	ocfs2_journal_dirty(handle, fe_bh);
 
 	err = ocfs2_add_entry(handle, dentry, inode,
@@ -993,6 +994,7 @@ static int ocfs2_unlink(struct inode *dir,
 		drop_nlink(inode);
 	drop_nlink(inode);
 	ocfs2_set_links_count(fe, inode->i_nlink);
+	ocfs2_update_inode_fsync_trans(handle, inode, 0);
 	ocfs2_journal_dirty(handle, fe_bh);
 
 	inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));