From: Ming Lei <tom.leiming@gmail.com>
To: Shaohua Li <shli@kernel.org>, Jens Axboe <axboe@fb.com>,
linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org,
linux-block@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>
Cc: Ming Lei <tom.leiming@gmail.com>
Subject: [PATCH v1 11/14] md: raid10: refactor code of read reshape's .bi_end_io
Date: Fri, 24 Feb 2017 23:42:48 +0800 [thread overview]
Message-ID: <1487950971-1131-12-git-send-email-tom.leiming@gmail.com> (raw)
In-Reply-To: <1487950971-1131-1-git-send-email-tom.leiming@gmail.com>
reshape read request is a bit special and requires one extra
bio which isn't allocated from r10buf_pool.
Refactor the .bi_end_io for read reshape, so that we can use
raid10's resync page mangement approach easily in the following
patches.
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
drivers/md/raid10.c | 28 ++++++++++++++++++----------
1 file changed, 18 insertions(+), 10 deletions(-)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 227dd6ad7716..c76e08ea4b92 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1907,17 +1907,9 @@ static int raid10_remove_disk(struct mddev *mddev, struct md_rdev *rdev)
return err;
}
-static void end_sync_read(struct bio *bio)
+static void __end_sync_read(struct r10bio *r10_bio, struct bio *bio, int d)
{
- struct r10bio *r10_bio = bio->bi_private;
struct r10conf *conf = r10_bio->mddev->private;
- int d;
-
- if (bio == r10_bio->master_bio) {
- /* this is a reshape read */
- d = r10_bio->read_slot; /* really the read dev */
- } else
- d = find_bio_disk(conf, r10_bio, bio, NULL, NULL);
if (!bio->bi_error)
set_bit(R10BIO_Uptodate, &r10_bio->state);
@@ -1941,6 +1933,22 @@ static void end_sync_read(struct bio *bio)
}
}
+static void end_sync_read(struct bio *bio)
+{
+ struct r10bio *r10_bio = bio->bi_private;
+ struct r10conf *conf = r10_bio->mddev->private;
+ int d = find_bio_disk(conf, r10_bio, bio, NULL, NULL);
+
+ __end_sync_read(r10_bio, bio, d);
+}
+
+static void end_reshape_read(struct bio *bio)
+{
+ struct r10bio *r10_bio = bio->bi_private;
+
+ __end_sync_read(r10_bio, bio, r10_bio->read_slot);
+}
+
static void end_sync_request(struct r10bio *r10_bio)
{
struct mddev *mddev = r10_bio->mddev;
@@ -4474,7 +4482,7 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr,
read_bio->bi_iter.bi_sector = (r10_bio->devs[r10_bio->read_slot].addr
+ rdev->data_offset);
read_bio->bi_private = r10_bio;
- read_bio->bi_end_io = end_sync_read;
+ read_bio->bi_end_io = end_reshape_read;
bio_set_op_attrs(read_bio, REQ_OP_READ, 0);
read_bio->bi_flags &= (~0UL << BIO_RESET_BITS);
read_bio->bi_error = 0;
--
2.7.4
next prev parent reply other threads:[~2017-02-24 15:42 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-24 15:42 [PATCH v1 00/14] md: cleanup on direct access to bvec table Ming Lei
2017-02-24 15:42 ` [PATCH v1 01/14] block: introduce bio_segments_all() Ming Lei
2017-02-25 18:22 ` Christoph Hellwig
2017-02-28 12:15 ` Ming Lei
2017-02-24 15:42 ` [PATCH v1 02/14] block: introduce bio_remove_last_page() Ming Lei
2017-02-25 18:23 ` Christoph Hellwig
2017-02-28 12:18 ` Ming Lei
2017-02-24 15:42 ` [PATCH v1 03/14] md: raid1/raid10: use bio_remove_last_page() Ming Lei
2017-02-24 15:42 ` [PATCH v1 04/14] md: move two macros into md.h Ming Lei
2017-02-24 15:42 ` [PATCH v1 05/14] md: prepare for managing resync I/O pages in clean way Ming Lei
2017-02-24 15:42 ` [PATCH v1 06/14] md: raid1: simplify r1buf_pool_free() Ming Lei
2017-02-24 15:42 ` [PATCH v1 07/14] md: raid1: don't use bio's vec table to manage resync pages Ming Lei
2017-02-24 15:42 ` [PATCH v1 08/14] md: raid1: retrieve page from pre-allocated resync page array Ming Lei
2017-02-24 15:42 ` [PATCH v1 09/14] md: raid1: use bio helper in process_checks() Ming Lei
2017-02-24 15:42 ` [PATCH v1 10/14] md: raid1: use bio_segments_all() Ming Lei
2017-02-24 15:42 ` Ming Lei [this message]
2017-02-24 15:42 ` [PATCH v1 12/14] md: raid10: don't use bio's vec table to manage resync pages Ming Lei
2017-02-24 15:42 ` [PATCH v1 13/14] md: raid10: retrieve page from preallocated resync page array Ming Lei
2017-02-24 15:42 ` [PATCH v1 14/14] md: raid10: avoid direct access to bvec table in handle_reshape_read_error Ming Lei
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