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From: Ming Lei <tom.leiming@gmail.com>
To: Jens Axboe <axboe@fb.com>, linux-kernel@vger.kernel.org
Cc: linux-block@vger.kernel.org,
	Christoph Hellwig <hch@infradead.org>,
	Ming Lei <tom.leiming@gmail.com>,
	Kent Overstreet <kent.overstreet@gmail.com>,
	Shaohua Li <shli@kernel.org>, Mike Christie <mchristi@redhat.com>,
	Guoqing Jiang <gqjiang@suse.com>,
	linux-bcache@vger.kernel.org (open list:BCACHE (BLOCK LAYER
	CACHE)),
	linux-raid@vger.kernel.org (open list:SOFTWARE RAID (Multiple
	Disks) SUPPORT)
Subject: [PATCH v1 23/54] bcache: handle bio_clone() & bvec updating for multipage bvecs
Date: Tue, 27 Dec 2016 23:56:12 +0800	[thread overview]
Message-ID: <1482854250-13481-24-git-send-email-tom.leiming@gmail.com> (raw)
In-Reply-To: <1482854250-13481-1-git-send-email-tom.leiming@gmail.com>

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@gmail.com>
---
 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, &sectors)) {
+		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

  parent reply	other threads:[~2016-12-27 16:02 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1482854250-13481-1-git-send-email-tom.leiming@gmail.com>
2016-12-27 15:55 ` [PATCH v1 01/54] block: drbd: comment on direct access bvec table Ming Lei
2016-12-27 15:55 ` [PATCH v1 02/54] block: loop: comment on direct access to " Ming Lei
2016-12-27 15:55 ` [PATCH v1 03/54] kernel/power/swap.c: " Ming Lei
2016-12-27 15:55 ` [PATCH v1 04/54] mm: page_io.c: " Ming Lei
2016-12-27 15:55 ` [PATCH v1 05/54] fs/buffer: " Ming Lei
2016-12-27 15:55 ` [PATCH v1 06/54] f2fs: f2fs_read_end_io: " Ming Lei
2016-12-27 15:55 ` [PATCH v1 07/54] bcache: " Ming Lei
2016-12-30 16:56   ` Coly Li
2016-12-27 15:55 ` [PATCH v1 08/54] block: comment on bio_alloc_pages() Ming Lei
2016-12-30 10:40   ` Coly Li
2016-12-30 11:06   ` Coly Li
2016-12-27 15:55 ` [PATCH v1 09/54] block: comment on bio_iov_iter_get_pages() Ming Lei
2016-12-27 15:55 ` [PATCH v1 10/54] block: introduce flag QUEUE_FLAG_NO_MP Ming Lei
2016-12-27 15:56 ` [PATCH v1 11/54] md: set NO_MP for request queue of md Ming Lei
2016-12-27 15:56 ` [PATCH v1 12/54] dm: limit the max bio size as BIO_MAX_PAGES * PAGE_SIZE Ming Lei
2017-01-03 16:43   ` Mike Snitzer
2017-01-06  3:30     ` Ming Lei
2016-12-27 15:56 ` [PATCH v1 13/54] block: comments on bio_for_each_segment[_all] Ming Lei
2016-12-27 15:56 ` [PATCH v1 14/54] block: introduce multipage/single page bvec helpers Ming Lei
2016-12-27 15:56 ` [PATCH v1 15/54] block: implement sp version of bvec iterator helpers Ming Lei
2016-12-27 15:56 ` [PATCH v1 16/54] block: introduce bio_for_each_segment_mp() Ming Lei
2016-12-27 15:56 ` [PATCH v1 17/54] block: introduce bio_clone_sp() Ming Lei
2016-12-27 15:56 ` [PATCH v1 18/54] bvec_iter: introduce BVEC_ITER_ALL_INIT Ming Lei
2016-12-27 15:56 ` [PATCH v1 19/54] block: bounce: avoid direct access to bvec table Ming Lei
2016-12-27 15:56 ` [PATCH v1 20/54] block: bounce: don't access bio->bi_io_vec in copy_to_high_bio_irq Ming Lei
2016-12-27 15:56 ` [PATCH v1 21/54] block: introduce bio_can_convert_to_sp() Ming Lei
2016-12-27 15:56 ` [PATCH v1 22/54] block: bounce: convert multipage bvecs into singlepage Ming Lei
2016-12-27 15:56 ` Ming Lei [this message]
2016-12-30 11:01   ` [PATCH v1 23/54] bcache: handle bio_clone() & bvec updating for multipage bvecs Coly Li
2016-12-31 10:29     ` Ming Lei
2016-12-27 15:56 ` [PATCH v1 24/54] blk-merge: compute bio->bi_seg_front_size efficiently Ming Lei
2016-12-27 15:56 ` [PATCH v1 25/54] block: blk-merge: try to make front segments in full size Ming Lei
2016-12-27 15:56 ` [PATCH v1 26/54] block: blk-merge: remove unnecessary check Ming Lei
2016-12-27 15:56 ` [PATCH v1 27/54] block: use bio_for_each_segment_mp() to compute segments count Ming Lei
2016-12-27 15:56 ` [PATCH v1 28/54] block: use bio_for_each_segment_mp() to map sg Ming Lei
2016-12-27 15:56 ` [PATCH v1 29/54] block: introduce bvec_for_each_sp_bvec() Ming Lei
2016-12-27 15:56 ` [PATCH v1 30/54] block: bio: introduce single/multi page version of bio_for_each_segment_all() Ming Lei
2016-12-27 15:56 ` [PATCH v1 31/54] block: introduce bio_segments_all() Ming Lei
2017-01-16  3:19 ` [PATCH v1 00/54] block: support multipage bvec Ming Lei
2017-01-16 15:18   ` Christoph Hellwig
2017-01-17  2:40     ` Ming Lei
2017-01-17  7:50       ` Christoph Hellwig
2017-01-17  8:13         ` Ming Lei

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