ext4: expand commit callback and

The per-commit callback was used by mballoc code to manage free space
bitmaps after deleted blocks have been released.  This patch expands
it to support multiple different callbacks, to allow other things to
be done after the commit has been completed.

Signed-off-by: Bobi Jam <bobijam@whamcloud.com>
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 10 insertions, 8 deletions

diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 47705f3285e3..7128f46d8501 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -96,21 +96,23 @@ extern u8 mb_enable_debug;
 
 
 struct ext4_free_data {
-        /* this links the free block information from group_info */
-        struct rb_node node;
+        /* MUST be the first member */
+        struct ext4_journal_cb_entry    efd_jce;
+
+        /* ext4_free_data private data starts from here */
 
-        /* this links the free block information from ext4_sb_info */
-        struct list_head list;
+        /* this links the free block information from group_info */
+        struct rb_node                  efd_node;
 
         /* group which free block extent belongs */
-        ext4_group_t group;
+        ext4_group_t                    efd_group;
 
         /* free block extent */
-        ext4_grpblk_t start_cluster;
-        ext4_grpblk_t count;
+        ext4_grpblk_t                   efd_start_cluster;
+        ext4_grpblk_t                   efd_count;
 
         /* transaction which freed this extent */
-        tid_t   t_tid;
+        tid_t                           efd_tid;
 };
 
 struct ext4_prealloc_space {