[PATCH] md/bitmap: use set_bit etc for bitmap page attributes

[linux-2.6] / drivers / md / raid1.c

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index b8c13c897ccbb0d9a1ff08a5ffe686d559a4e5fb..b3cfae41f7690d0cc8e09ba25896ebffc3b4e5ef 100644 (file)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -319,6 +319,7 @@ static int raid1_end_write_request(struct bio *bio, unsigned int bytes_done, int
                set_bit(BarriersNotsupp, &conf->mirrors[mirror].rdev->flags);
                set_bit(R1BIO_BarrierRetry, &r1_bio->state);
                r1_bio->mddev->barriers_work = 0;
+               /* Don't rdev_dec_pending in this branch - keep it for the retry */
        } else {
                /*
                 * this branch is our 'one mirror IO has finished' event handler:
@@ -365,6 +366,7 @@ static int raid1_end_write_request(struct bio *bio, unsigned int bytes_done, int
                                }
                        }
                }
+               rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev);
        }
        /*
         *
@@ -372,30 +374,26 @@ static int raid1_end_write_request(struct bio *bio, unsigned int bytes_done, int
         * already.
         */
        if (atomic_dec_and_test(&r1_bio->remaining)) {
-               if (test_bit(R1BIO_BarrierRetry, &r1_bio->state)) {
+               if (test_bit(R1BIO_BarrierRetry, &r1_bio->state))
                        reschedule_retry(r1_bio);
-                       /* Don't dec_pending yet, we want to hold
-                        * the reference over the retry
-                        */
-                       goto out;
-               }
-               if (test_bit(R1BIO_BehindIO, &r1_bio->state)) {
-                       /* free extra copy of the data pages */
-                       int i = bio->bi_vcnt;
-                       while (i--)
-                               safe_put_page(bio->bi_io_vec[i].bv_page);
+               else {
+                       /* it really is the end of this request */
+                       if (test_bit(R1BIO_BehindIO, &r1_bio->state)) {
+                               /* free extra copy of the data pages */
+                               int i = bio->bi_vcnt;
+                               while (i--)
+                                       safe_put_page(bio->bi_io_vec[i].bv_page);
+                       }
+                       /* clear the bitmap if all writes complete successfully */
+                       bitmap_endwrite(r1_bio->mddev->bitmap, r1_bio->sector,
+                                       r1_bio->sectors,
+                                       !test_bit(R1BIO_Degraded, &r1_bio->state),
+                                       behind);
+                       md_write_end(r1_bio->mddev);
+                       raid_end_bio_io(r1_bio);
                }
-               /* clear the bitmap if all writes complete successfully */
-               bitmap_endwrite(r1_bio->mddev->bitmap, r1_bio->sector,
-                               r1_bio->sectors,
-                               !test_bit(R1BIO_Degraded, &r1_bio->state),
-                               behind);
-               md_write_end(r1_bio->mddev);
-               raid_end_bio_io(r1_bio);
        }
 
-       rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev);
- out:
        if (to_put)
                bio_put(to_put);
 
@@ -1414,6 +1412,7 @@ static void raid1d(mddev_t *mddev)
                         * Better resubmit without the barrier.
                         * We know which devices to resubmit for, because
                         * all others have had their bios[] entry cleared.
+                        * We already have a nr_pending reference on these rdevs.
                         */
                        int i;
                        clear_bit(R1BIO_BarrierRetry, &r1_bio->state);
@@ -1889,7 +1888,8 @@ static int run(mddev_t *mddev)
 
                disk = conf->mirrors + i;
 
-               if (!disk->rdev) {
+               if (!disk->rdev ||
+                   !test_bit(In_sync, &disk->rdev->flags)) {
                        disk->head_position = 0;
                        mddev->degraded++;
                }