From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Ming Lei <ming.lei@redhat.com>,
Dave Chinner <dchinner@redhat.com>,
Kent Overstreet <kent.overstreet@gmail.com>,
Mike Snitzer <snitzer@redhat.com>,
dm-devel@redhat.com, Alexander Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel@vger.kernel.org, Shaohua Li <shli@kernel.org>,
linux-raid@vger.kernel.org, linux-erofs@lists.ozlabs.org,
David Sterba <dsterba@suse.com>,
linux-btrfs@vger.kernel.org,
"Darrick J . Wong" <darrick.wong@oracle.com>,
linux-xfs@vger.kernel.org, Gao Xiang <gaoxiang25@huawei.com>,
Christoph Hellwig <hch@lst.de>, Theodore Ts'o <tytso@mit.edu>,
linux-ext4@vger.kernel.org, Coly Li <colyli@suse.de>,
linux-bcache@vger.kernel.org, Boaz Harrosh <ooo@electrozaur.com>,
Bob Peterson <rpeterso@redhat.com>,
cluster-devel@redhat.com
Subject: [PATCH V10 09/19] block: introduce bio_bvecs()
Date: Thu, 15 Nov 2018 16:52:56 +0800 [thread overview]
Message-ID: <20181115085306.9910-10-ming.lei@redhat.com> (raw)
In-Reply-To: <20181115085306.9910-1-ming.lei@redhat.com>
There are still cases in which we need to use bio_bvecs() for get the
number of multi-page segment, so introduce it.
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: dm-devel@redhat.com
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: Shaohua Li <shli@kernel.org>
Cc: linux-raid@vger.kernel.org
Cc: linux-erofs@lists.ozlabs.org
Cc: David Sterba <dsterba@suse.com>
Cc: linux-btrfs@vger.kernel.org
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: linux-xfs@vger.kernel.org
Cc: Gao Xiang <gaoxiang25@huawei.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: linux-ext4@vger.kernel.org
Cc: Coly Li <colyli@suse.de>
Cc: linux-bcache@vger.kernel.org
Cc: Boaz Harrosh <ooo@electrozaur.com>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: cluster-devel@redhat.com
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
include/linux/bio.h | 30 +++++++++++++++++++++++++-----
1 file changed, 25 insertions(+), 5 deletions(-)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 1f0dcf109841..3496c816946e 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -196,7 +196,6 @@ static inline unsigned bio_segments(struct bio *bio)
* We special case discard/write same/write zeroes, because they
* interpret bi_size differently:
*/
-
switch (bio_op(bio)) {
case REQ_OP_DISCARD:
case REQ_OP_SECURE_ERASE:
@@ -205,13 +204,34 @@ static inline unsigned bio_segments(struct bio *bio)
case REQ_OP_WRITE_SAME:
return 1;
default:
- break;
+ bio_for_each_segment(bv, bio, iter)
+ segs++;
+ return segs;
}
+}
- bio_for_each_segment(bv, bio, iter)
- segs++;
+static inline unsigned bio_bvecs(struct bio *bio)
+{
+ unsigned bvecs = 0;
+ struct bio_vec bv;
+ struct bvec_iter iter;
- return segs;
+ /*
+ * We special case discard/write same/write zeroes, because they
+ * interpret bi_size differently:
+ */
+ switch (bio_op(bio)) {
+ case REQ_OP_DISCARD:
+ case REQ_OP_SECURE_ERASE:
+ case REQ_OP_WRITE_ZEROES:
+ return 0;
+ case REQ_OP_WRITE_SAME:
+ return 1;
+ default:
+ bio_for_each_bvec(bv, bio, iter)
+ bvecs++;
+ return bvecs;
+ }
}
/*
--
2.9.5
next prev parent reply other threads:[~2018-11-15 8:55 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-15 8:52 [PATCH V10 00/19] block: support multi-page bvec Ming Lei
2018-11-15 8:52 ` [PATCH V10 01/19] block: introduce multi-page page bvec helpers Ming Lei
2018-11-15 18:25 ` Omar Sandoval
2018-11-19 2:25 ` Ming Lei
2018-11-16 13:13 ` Christoph Hellwig
2018-11-19 2:23 ` Ming Lei
2018-11-19 3:10 ` Jens Axboe
2018-11-19 3:35 ` Ming Lei
2018-11-15 8:52 ` [PATCH V10 02/19] block: introduce bio_for_each_bvec() Ming Lei
2018-11-15 18:28 ` Omar Sandoval
2018-11-16 13:30 ` Christoph Hellwig
2018-11-19 3:31 ` Ming Lei
2018-11-15 8:52 ` [PATCH V10 03/19] block: use bio_for_each_bvec() to compute multi-page bvec count Ming Lei
2018-11-15 20:20 ` Omar Sandoval
2018-11-15 21:05 ` Mike Snitzer
2018-11-15 22:18 ` Omar Sandoval
2018-11-16 9:19 ` Christoph Hellwig
2018-11-16 9:41 ` Gao Xiang
2018-11-16 16:04 ` Omar Sandoval
2018-11-19 7:50 ` Ming Lei
2018-11-15 8:52 ` [PATCH V10 04/19] block: use bio_for_each_bvec() to map sg Ming Lei
2018-11-15 22:33 ` Omar Sandoval
2018-11-16 13:33 ` Christoph Hellwig
2018-11-19 7:51 ` Ming Lei
2018-11-15 8:52 ` [PATCH V10 05/19] block: introduce bvec_last_segment() Ming Lei
2018-11-15 23:23 ` Omar Sandoval
2018-11-19 7:57 ` Ming Lei
2018-11-16 13:34 ` Christoph Hellwig
2018-11-15 8:52 ` [PATCH V10 06/19] fs/buffer.c: use bvec iterator to truncate the bio Ming Lei
2018-11-16 0:20 ` Omar Sandoval
2018-11-16 13:36 ` Christoph Hellwig
2018-11-15 8:52 ` [PATCH V10 07/19] btrfs: use bvec_last_segment to get bio's last page Ming Lei
2018-11-16 0:21 ` Omar Sandoval
2018-11-16 13:37 ` Christoph Hellwig
2018-11-19 8:09 ` Ming Lei
2018-11-15 8:52 ` [PATCH V10 08/19] btrfs: move bio_pages_all() to btrfs Ming Lei
2018-11-16 0:23 ` Omar Sandoval
2018-11-19 8:15 ` Ming Lei
2018-11-16 13:38 ` Christoph Hellwig
2018-11-19 8:19 ` Ming Lei
2018-11-19 8:24 ` Christoph Hellwig
2018-11-15 8:52 ` Ming Lei [this message]
2018-11-16 0:26 ` [PATCH V10 09/19] block: introduce bio_bvecs() Omar Sandoval
2018-11-16 13:45 ` Christoph Hellwig
2018-11-19 8:21 ` Ming Lei
2018-11-20 0:49 ` Sagi Grimberg
2018-11-20 16:16 ` Christoph Hellwig
2018-11-20 20:11 ` Sagi Grimberg
2018-11-21 0:59 ` Ming Lei
2018-11-21 3:20 ` Sagi Grimberg
2018-11-21 3:44 ` Ming Lei
2018-11-21 4:25 ` Sagi Grimberg
2018-11-21 4:42 ` Sagi Grimberg
2018-11-21 5:04 ` Ming Lei
2018-11-21 5:35 ` Sagi Grimberg
2018-11-21 8:46 ` Christoph Hellwig
2018-11-21 10:19 ` Ming Lei
2018-11-15 8:52 ` [PATCH V10 10/19] block: loop: pass multi-page bvec to iov_iter Ming Lei
2018-11-16 0:40 ` Omar Sandoval
2018-11-19 8:25 ` Ming Lei
2018-11-15 8:52 ` [PATCH V10 11/19] bcache: avoid to use bio_for_each_segment_all() in bch_bio_alloc_pages() Ming Lei
2018-11-16 0:44 ` Omar Sandoval
2018-11-19 8:27 ` Ming Lei
2018-11-16 13:46 ` Christoph Hellwig
2018-11-19 8:28 ` Ming Lei
2018-11-15 8:52 ` [PATCH V10 12/19] block: allow bio_for_each_segment_all() to iterate over multi-page bvec Ming Lei
2018-11-15 12:42 ` David Sterba
2018-11-19 8:29 ` Ming Lei
2018-11-16 1:22 ` Omar Sandoval
2018-11-19 8:32 ` Ming Lei
2018-11-15 8:53 ` [PATCH V10 13/19] iomap & xfs: only account for new added page Ming Lei
2018-11-16 1:46 ` Omar Sandoval
2018-11-19 8:35 ` Ming Lei
2018-11-16 13:49 ` Christoph Hellwig
2018-11-19 8:39 ` Ming Lei
2018-11-15 8:53 ` [PATCH V10 14/19] block: enable multipage bvecs Ming Lei
2018-11-16 1:56 ` Omar Sandoval
2018-11-19 8:45 ` Ming Lei
2018-11-16 13:53 ` Christoph Hellwig
2018-11-19 9:00 ` Ming Lei
2018-11-15 8:53 ` [PATCH V10 15/19] block: always define BIO_MAX_PAGES as 256 Ming Lei
2018-11-16 1:59 ` Omar Sandoval
2018-11-19 9:04 ` Ming Lei
2018-11-20 2:45 ` Huang, Ying
2018-11-16 13:53 ` Christoph Hellwig
2018-11-15 8:53 ` [PATCH V10 16/19] block: document usage of bio iterator helpers Ming Lei
2018-11-16 2:05 ` Omar Sandoval
2018-11-15 8:53 ` [PATCH V10 17/19] block: don't use bio->bi_vcnt to figure out segment number Ming Lei
2018-11-16 2:11 ` Omar Sandoval
2018-11-19 9:06 ` Ming Lei
2018-11-16 13:55 ` Christoph Hellwig
2018-11-15 8:53 ` [PATCH V10 18/19] block: kill QUEUE_FLAG_NO_SG_MERGE Ming Lei
2018-11-16 2:18 ` Omar Sandoval
2018-11-16 13:59 ` Christoph Hellwig
2018-11-16 16:40 ` Omar Sandoval
2018-11-19 9:17 ` Ming Lei
2018-11-16 13:58 ` Christoph Hellwig
2018-11-19 9:20 ` Ming Lei
2018-11-15 8:53 ` [PATCH V10 19/19] block: kill BLK_MQ_F_SG_MERGE Ming Lei
2018-11-16 13:59 ` Christoph Hellwig
2018-11-16 16:40 ` Omar Sandoval
2018-11-16 14:03 ` [PATCH V10 00/19] block: support multi-page bvec Christoph Hellwig
2018-11-17 2:42 ` Ming Lei
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181115085306.9910-10-ming.lei@redhat.com \
--to=ming.lei@redhat.com \
--cc=axboe@kernel.dk \
--cc=cluster-devel@redhat.com \
--cc=colyli@suse.de \
--cc=darrick.wong@oracle.com \
--cc=dchinner@redhat.com \
--cc=dm-devel@redhat.com \
--cc=dsterba@suse.com \
--cc=gaoxiang25@huawei.com \
--cc=hch@lst.de \
--cc=kent.overstreet@gmail.com \
--cc=linux-bcache@vger.kernel.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-btrfs@vger.kernel.org \
--cc=linux-erofs@lists.ozlabs.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-raid@vger.kernel.org \
--cc=linux-xfs@vger.kernel.org \
--cc=ooo@electrozaur.com \
--cc=rpeterso@redhat.com \
--cc=shli@kernel.org \
--cc=snitzer@redhat.com \
--cc=tytso@mit.edu \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).