drbd: Keep a reference to barrier acked requests

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 2be057b..5bb5114 100644 (file)
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1022,6 +1022,7 @@ struct drbd_conf {
        struct drbd_tl_epoch *newest_tle;
        struct drbd_tl_epoch *oldest_tle;
        struct list_head out_of_sequence_requests;
+       struct list_head barrier_acked_requests;
        struct hlist_head *tl_hash;
        unsigned int tl_hash_s;
 

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index a15135b..8e489a6 100644 (file)
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -208,6 +208,7 @@ static int tl_init(struct drbd_conf *mdev)
        mdev->oldest_tle = b;
        mdev->newest_tle = b;
        INIT_LIST_HEAD(&mdev->out_of_sequence_requests);
+       INIT_LIST_HEAD(&mdev->barrier_acked_requests);
 
        mdev->tl_hash = NULL;
        mdev->tl_hash_s = 0;
@@ -311,7 +312,7 @@ void tl_release(struct drbd_conf *mdev, unsigned int barrier_nr,
           These have been list_move'd to the out_of_sequence_requests list in
           _req_mod(, barrier_acked) above.
           */
-       list_del_init(&b->requests);
+       list_splice_init(&b->requests, &mdev->barrier_acked_requests);
 
        nob = b->next;
        if (test_and_clear_bit(CREATE_BARRIER, &mdev->flags)) {
@@ -343,7 +344,7 @@ bail:
  * @what:       The action/event to perform with all request objects
  *
  * @what might be one of connection_lost_while_pending, resend, fail_frozen_disk_io,
- * restart_frozen_disk_io.
+ * restart_frozen_disk_io, abort_disk_io.
  */
 static void _tl_restart(struct drbd_conf *mdev, enum drbd_req_event what)
 {
@@ -411,6 +412,24 @@ static void _tl_restart(struct drbd_conf *mdev, enum drbd_req_event what)
                b = tmp;
                list_splice(&carry_reads, &b->requests);
        }
+
+       /* Actions operating on the disk state, also want to work on
+          requests that got barrier acked. */
+       switch (what) {
+       case abort_disk_io:
+       case fail_frozen_disk_io:
+       case restart_frozen_disk_io:
+               list_for_each_safe(le, tle, &mdev->barrier_acked_requests) {
+                       req = list_entry(le, struct drbd_request, tl_requests);
+                       _req_mod(req, what);
+               }
+
+       case connection_lost_while_pending:
+       case resend:
+               break;
+       default:
+               dev_err(DEV, "what = %d in _tl_restart()\n", what);
+       }
 }
 
 

diff --git a/drivers/block/drbd/drbd_req.h b/drivers/block/drbd/drbd_req.h
index 68a234a..74c5b9f 100644 (file)
--- a/drivers/block/drbd/drbd_req.h
+++ b/drivers/block/drbd/drbd_req.h
@@ -105,6 +105,7 @@ enum drbd_req_event {
        read_completed_with_error,
        read_ahead_completed_with_error,
        write_completed_with_error,
+       abort_disk_io,
        completed_ok,
        resend,
        fail_frozen_disk_io,