The incoming bio may be too big to be cloned into
one singlepage bvecs bio, so split the bio and
check the splitted bio one by one.
Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx>
---
drivers/md/bcache/debug.c | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 48d03e8b3385..18b2d2d138e3 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -103,7 +103,7 @@ void bch_btree_verify(struct btree *b)
up(&b->io_mutex);
}
-void bch_data_verify(struct cached_dev *dc, struct bio *bio)
+static void __bch_data_verify(struct cached_dev *dc, struct bio *bio)
{
char name[BDEVNAME_SIZE];
struct bio *check;
@@ -116,7 +116,7 @@ void bch_data_verify(struct cached_dev *dc, struct bio *bio)
* in the new cloned bio because each single page need
* to assign to each bvec of the new bio.
*/
- check = bio_clone(bio, GFP_NOIO);
+ check = bio_clone_sp(bio, GFP_NOIO);
if (!check)
return;
check->bi_opf = REQ_OP_READ;
@@ -151,6 +151,26 @@ void bch_data_verify(struct cached_dev *dc, struct bio *bio)
bio_put(check);
}
+void bch_data_verify(struct cached_dev *dc, struct bio *bio)
+{
+ struct request_queue *q = bdev_get_queue(bio->bi_bdev);
+ struct bio *clone = bio_clone_fast(bio, GFP_NOIO, q->bio_split);
+ unsigned sectors;
+
+ while (!bio_can_convert_to_sp(clone, §ors)) {
+ struct bio *split = bio_split(clone, sectors,
+ GFP_NOIO, q->bio_split);
+
+ __bch_data_verify(dc, split);
+ bio_put(split);
+ }
+
+ if (bio_sectors(clone))
+ __bch_data_verify(dc, clone);
+
+ bio_put(clone);
+}
+
#endif
#ifdef CONFIG_DEBUG_FS
--
2.7.4
--
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