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: Yuanyuan Zhong <yzhong@purestorage.com>,
Casey Chen <cachen@purestorage.com>,
Ming Lei <ming.lei@redhat.com>, Keith Busch <kbusch@kernel.org>
Subject: [PATCHv3 3/4] block: return errors from blk_execute_rq()
Date: Fri, 21 May 2021 13:21:44 -0700 [thread overview]
Message-ID: <20210521202145.3674904-4-kbusch@kernel.org> (raw)
In-Reply-To: <20210521202145.3674904-1-kbusch@kernel.org>
The synchronous blk_execute_rq() had not provided a way for its callers
to know if its request was successful or not. Return the blk_status_t
result of the request.
Signed-off-by: Keith Busch <kbusch@kernel.org>
---
v2->v3:
Return blk_status_t instead of errno.
Removed "extern" header declaration, and named the parameters.
block/blk-exec.c | 7 +++++--
include/linux/blkdev.h | 4 +++-
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/block/blk-exec.c b/block/blk-exec.c
index 38f88552aa31..d6cd501c0d34 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 = (void *)(uintptr_t)error;
/*
* complete last, if this is a stack request the process (and thus
@@ -85,8 +85,9 @@ static void blk_rq_poll_completion(struct request *rq, struct completion *wait)
* Description:
* Insert a fully prepared request at the back of the I/O scheduler queue
* for execution and wait for completion.
+ * Return: The blk_status_t result provided to blk_mq_end_request().
*/
-void blk_execute_rq(struct gendisk *bd_disk, struct request *rq, int at_head)
+blk_status_t blk_execute_rq(struct gendisk *bd_disk, struct request *rq, int at_head)
{
DECLARE_COMPLETION_ONSTACK(wait);
unsigned long hang_check;
@@ -103,5 +104,7 @@ 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 (blk_status_t)(uintptr_t)rq->end_io_data;
}
EXPORT_SYMBOL(blk_execute_rq);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 2c28577b50f4..2d2b477241ba 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -936,10 +936,12 @@ 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 void blk_execute_rq_nowait(struct gendisk *,
struct request *, int, rq_end_io_fn *);
+blk_status_t blk_execute_rq(struct gendisk *bd_disk, struct request *rq,
+ int at_head);
+
/* Helper to convert REQ_OP_XXX to its string format XXX */
extern const char *blk_op_str(unsigned int op);
--
2.25.4
next prev parent reply other threads:[~2021-05-21 20:21 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-21 20:21 [PATCHv3 0/4] block and nvme passthrough error handling Keith Busch
2021-05-21 20:21 ` [PATCHv3 1/4] block: support polling through blk_execute_rq Keith Busch
2021-05-24 7:38 ` Christoph Hellwig
2021-05-26 8:16 ` Ming Lei
2021-05-21 20:21 ` [PATCHv3 2/4] nvme: use blk_execute_rq() for passthrough commands Keith Busch
2021-05-24 7:38 ` Christoph Hellwig
2021-05-26 8:24 ` Ming Lei
2021-05-26 8:47 ` Kanchan Joshi
2021-06-07 16:15 ` Keith Busch
2021-06-08 5:26 ` Christoph Hellwig
2021-05-21 20:21 ` Keith Busch [this message]
2021-05-24 7:39 ` [PATCHv3 3/4] block: return errors from blk_execute_rq() Christoph Hellwig
2021-05-26 8:26 ` Ming Lei
2021-05-21 20:21 ` [PATCHv3 4/4] nvme: use return value " Keith Busch
2021-05-24 8:04 ` Christoph Hellwig
2021-06-07 16:58 ` Keith Busch
2021-06-08 5:26 ` Christoph Hellwig
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