1/ We don't de-reference the rdev when the read completes.
This means we need to record the rdev to so it is still
available in the end_io routine. Fortunately
bi_next in the original bio is unused at this point so
we can stuff it in there.
2/ We leak a cloned by if the target rdev is not usasble.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
### Diffstat output
./drivers/md/raid5.c | 7 +++++++
1 file changed, 7 insertions(+)
diff .prev/drivers/md/raid5.c ./drivers/md/raid5.c
--- .prev/drivers/md/raid5.c 2006-11-14 11:00:51.000000000 +1100
+++ ./drivers/md/raid5.c 2006-11-14 11:06:44.000000000 +1100
@@ -2699,6 +2699,7 @@ static int raid5_align_endio(struct bio
mddev_t *mddev;
raid5_conf_t *conf;
int uptodate = test_bit(BIO_UPTODATE, &bi->bi_flags);
+ mdk_rdev_t *rdev;
if (bi->bi_size)
return 1;
@@ -2706,6 +2707,10 @@ static int raid5_align_endio(struct bio
mddev = raid_bi->bi_bdev->bd_disk->queue->queuedata;
conf = mddev_to_conf(mddev);
+ rdev = (void*)raid_bi->bi_next;
+ raid_bi->bi_next = NULL;
+
+ rdev_dec_pending(rdev, conf->mddev);
if (!error && uptodate) {
bio_endio(raid_bi, bytes, 0);
@@ -2762,6 +2767,7 @@ static int chunk_aligned_read(request_qu
if (rdev && test_bit(In_sync, &rdev->flags)) {
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
+ raid_bio->bi_next = (void*)rdev;
align_bi->bi_bdev = rdev->bdev;
align_bi->bi_flags &= ~(1 << BIO_SEG_VALID);
align_bi->bi_sector += rdev->data_offset;
@@ -2777,6 +2783,7 @@ static int chunk_aligned_read(request_qu
return 1;
} else {
rcu_read_unlock();
+ bio_put(align_bi);
return 0;
}
}
-
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