From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@fb.com>, Christoph Hellwig <hch@infradead.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Kent Overstreet <kent.overstreet@gmail.com>
Cc: Huang Ying <ying.huang@intel.com>,
linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
Theodore Ts'o <tytso@mit.edu>,
"Darrick J . Wong" <darrick.wong@oracle.com>,
Coly Li <colyli@suse.de>, Filipe Manana <fdmanana@gmail.com>,
Ming Lei <ming.lei@redhat.com>
Subject: [PATCH V4 27/45] block: introduce rq_for_each_segment()
Date: Mon, 18 Dec 2017 20:22:29 +0800 [thread overview]
Message-ID: <20171218122247.3488-28-ming.lei@redhat.com> (raw)
In-Reply-To: <20171218122247.3488-1-ming.lei@redhat.com>
There are still cases in which rq_for_each_segment() is required, for
example, loop.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
include/linux/blkdev.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ecc1a24bb5a2..99c65889fd4f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -911,6 +911,10 @@ struct req_iterator {
__rq_for_each_bio(_iter.bio, _rq) \
bio_for_each_page(bvl, _iter.bio, _iter.iter)
+#define rq_for_each_segment(bvl, _rq, _iter) \
+ __rq_for_each_bio(_iter.bio, _rq) \
+ bio_for_each_segment(bvl, _iter.bio, _iter.iter)
+
#define rq_iter_last(bvec, _iter) \
(_iter.bio->bi_next == NULL && \
bio_iter_last(bvec, _iter.iter))
--
2.9.5
--
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next prev parent reply other threads:[~2017-12-18 12:29 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-18 12:22 [PATCH V4 00/45] block: support multipage bvec Ming Lei
2017-12-18 12:22 ` [PATCH V4 01/45] block: introduce bio helpers for converting to " Ming Lei
2017-12-18 12:22 ` [PATCH V4 02/45] block: conver to bio_first_bvec_all & bio_first_page_all Ming Lei
2017-12-18 12:22 ` [PATCH V4 03/45] fs: convert to bio_last_bvec_all() Ming Lei
2017-12-18 12:22 ` [PATCH V4 04/45] block: bounce: avoid direct access to bvec table Ming Lei
2017-12-18 12:22 ` [PATCH V4 05/45] block: bounce: don't access bio->bi_io_vec in copy_to_high_bio_irq Ming Lei
2017-12-18 12:22 ` [PATCH V4 06/45] dm: limit the max bio size as BIO_MAX_PAGES * PAGE_SIZE Ming Lei
2017-12-18 12:22 ` [PATCH V4 07/45] bcache: comment on direct access to bvec table Ming Lei
2017-12-18 12:22 ` [PATCH V4 08/45] block: move bio_alloc_pages() to bcache Ming Lei
2017-12-18 12:22 ` [PATCH V4 09/45] btrfs: avoid access to .bi_vcnt directly Ming Lei
2017-12-18 12:22 ` [PATCH V4 10/45] btrfs: avoid to access bvec table directly for a cloned bio Ming Lei
2017-12-18 12:22 ` [PATCH V4 11/45] dm-crypt: don't clear bvec->bv_page in crypt_free_buffer_pages() Ming Lei
2017-12-18 12:22 ` [PATCH V4 12/45] blk-merge: compute bio->bi_seg_front_size efficiently Ming Lei
2017-12-18 12:22 ` [PATCH V4 13/45] block: blk-merge: try to make front segments in full size Ming Lei
2018-01-08 21:09 ` Dmitry Osipenko
2018-01-09 2:34 ` Ming Lei
2018-01-09 13:18 ` Dmitry Osipenko
2018-01-09 14:33 ` Ming Lei
2018-01-09 17:02 ` Dmitry Osipenko
2018-01-10 2:40 ` Ming Lei
2018-01-10 15:41 ` Dmitry Osipenko
2017-12-18 12:22 ` [PATCH V4 14/45] block: blk-merge: remove unnecessary check Ming Lei
2017-12-18 12:22 ` [PATCH V4 15/45] block: rename bio_for_each_segment* with bio_for_each_page* Ming Lei
2018-01-06 16:19 ` Jens Axboe
2017-12-18 12:22 ` [PATCH V4 16/45] block: rename rq_for_each_segment as rq_for_each_page Ming Lei
2017-12-18 12:22 ` [PATCH V4 17/45] block: rename bio_segments() with bio_pages() Ming Lei
2017-12-18 12:22 ` [PATCH V4 18/45] block: introduce multipage page bvec helpers Ming Lei
2017-12-18 12:22 ` [PATCH V4 19/45] block: introduce bio_for_each_segment() Ming Lei
2017-12-18 12:22 ` [PATCH V4 20/45] block: use bio_for_each_segment() to compute segments count Ming Lei
2017-12-18 12:22 ` [PATCH V4 21/45] block: use bio_for_each_segment() to map sg Ming Lei
2017-12-18 12:22 ` [PATCH V4 22/45] block: introduce segment_last_page() Ming Lei
2017-12-18 12:22 ` [PATCH V4 23/45] fs/buffer.c: use bvec iterator to truncate the bio Ming Lei
2017-12-18 12:22 ` [PATCH V4 24/45] btrfs: use segment_last_page to get bio's last page Ming Lei
2017-12-18 12:22 ` [PATCH V4 25/45] block: implement bio_pages_all() via bio_for_each_page_all() Ming Lei
2017-12-18 12:22 ` [PATCH V4 26/45] block: introduce bio_segments() Ming Lei
2017-12-18 12:22 ` Ming Lei [this message]
2017-12-18 12:22 ` [PATCH V4 28/45] block: loop: pass segments to iov_iter Ming Lei
2017-12-18 12:22 ` [PATCH V4 29/45] block: bio: introduce bio_for_each_page_all2 and bio_for_each_segment_all Ming Lei
2017-12-18 12:22 ` [PATCH V4 30/45] block: deal with dirtying pages for multipage bvec Ming Lei
2017-12-18 12:22 ` [PATCH V4 31/45] block: convert to bio_for_each_page_all2() Ming Lei
2017-12-18 12:22 ` [PATCH V4 32/45] md/dm/bcache: conver to bio_for_each_page_all2 and bio_for_each_segment Ming Lei
2017-12-18 12:22 ` [PATCH V4 33/45] fs: conver to bio_for_each_page_all2 Ming Lei
2017-12-18 12:22 ` [PATCH V4 34/45] btrfs: " Ming Lei
2017-12-18 12:22 ` [PATCH V4 35/45] ext4: " Ming Lei
2017-12-18 12:22 ` [PATCH V4 36/45] f2fs: " Ming Lei
2017-12-18 12:22 ` [PATCH V4 37/45] xfs: " Ming Lei
2017-12-18 12:22 ` [PATCH V4 38/45] exofs: " Ming Lei
2017-12-18 12:22 ` [PATCH V4 39/45] gfs2: " Ming Lei
2017-12-18 12:22 ` [PATCH V4 40/45] block: kill bio_for_each_page_all() Ming Lei
2017-12-18 12:22 ` [PATCH V4 41/45] block: rename bio_for_each_page_all2 as bio_for_each_page_all Ming Lei
2017-12-18 12:22 ` [PATCH V4 42/45] block: enable multipage bvecs Ming Lei
2017-12-18 12:22 ` [PATCH V4 43/45] block: bio: pass segments to bio if bio_add_page() is bypassed Ming Lei
2017-12-18 12:22 ` [PATCH V4 44/45] block: always define BIO_MAX_PAGES as 256 Ming Lei
2017-12-18 12:22 ` [PATCH V4 45/45] block: document usage of bio iterator helpers Ming Lei
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