From: Keith Busch <kbusch@kernel.org>
To: linux-nvme@lists.infradead.org, sagi@grimberg.me, hch@lst.de,
axboe@kernel.dk, linux-block@vger.kernel.org
Cc: Keith Busch <kbusch@kernel.org>, Yuanyuan Zhong <yzhong@purestorage.com>
Subject: [PATCH 1/2] block: return errors from blk_execute_rq()
Date: Fri, 16 Apr 2021 09:53:52 -0700 [thread overview]
Message-ID: <20210416165353.3088547-1-kbusch@kernel.org> (raw)
The synchronous blk_execute_rq() had not provided a way for its callers
to know if its request was successful or not. Return the errno from the
completion status.
Reported-by: Yuanyuan Zhong <yzhong@purestorage.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
---
block/blk-exec.c | 6 ++++--
include/linux/blkdev.h | 2 +-
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/block/blk-exec.c b/block/blk-exec.c
index beae70a0e5e5..3877a2677dd4 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -21,7 +21,7 @@ static void blk_end_sync_rq(struct request *rq, blk_status_t error)
{
struct completion *waiting = rq->end_io_data;
- rq->end_io_data = NULL;
+ rq->end_io_data = ERR_PTR(blk_status_to_errno(error));
/*
* complete last, if this is a stack request the process (and thus
@@ -72,8 +72,9 @@ EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
* Description:
* Insert a fully prepared request at the back of the I/O scheduler queue
* for execution and wait for completion.
+ * Return: The errno value of the blk_status_t provided to blk_mq_end_request().
*/
-void blk_execute_rq(struct gendisk *bd_disk, struct request *rq, int at_head)
+int blk_execute_rq(struct gendisk *bd_disk, struct request *rq, int at_head)
{
DECLARE_COMPLETION_ONSTACK(wait);
unsigned long hang_check;
@@ -87,5 +88,6 @@ void blk_execute_rq(struct gendisk *bd_disk, struct request *rq, int at_head)
while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2)));
else
wait_for_completion_io(&wait);
+ return PTR_ERR_OR_ZERO(rq->end_io_data);
}
EXPORT_SYMBOL(blk_execute_rq);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b91ba6207365..15e4ffac33af 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -938,7 +938,7 @@ extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, uns
extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
struct rq_map_data *, const struct iov_iter *,
gfp_t);
-extern void blk_execute_rq(struct gendisk *, struct request *, int);
+extern int blk_execute_rq(struct gendisk *, struct request *, int);
extern void blk_execute_rq_nowait(struct gendisk *,
struct request *, int, rq_end_io_fn *);
--
2.25.4
_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme
next reply other threads:[~2021-04-16 16:54 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 16:53 Keith Busch [this message]
2021-04-16 16:53 ` [PATCH 2/2] nvme: use return value from blk_execute_rq() Keith Busch
2021-04-16 17:12 ` Yuanyuan Zhong
2021-04-16 17:17 ` Keith Busch
2021-04-19 7:16 ` Christoph Hellwig
2021-04-19 15:14 ` Keith Busch
2021-04-19 17:27 ` Yuanyuan Zhong
2021-04-19 17:48 ` Keith Busch
2021-04-19 18:20 ` Yuanyuan Zhong
2021-04-18 4:17 ` Chaitanya Kulkarni
2021-04-18 4:13 ` [PATCH 1/2] block: return errors " Chaitanya Kulkarni
2021-04-23 21:57 Keith Busch
2021-04-23 22:04 ` Keith Busch
2021-04-26 14:31 ` Christoph Hellwig
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=20210416165353.3088547-1-kbusch@kernel.org \
--to=kbusch@kernel.org \
--cc=axboe@kernel.dk \
--cc=hch@lst.de \
--cc=linux-block@vger.kernel.org \
--cc=linux-nvme@lists.infradead.org \
--cc=sagi@grimberg.me \
--cc=yzhong@purestorage.com \
/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).