blk-mq: pass a reserved argument to the timeout handler
Allow blk-mq to pass an argument to the timeout handler to indicate
if we're timing out a reserved or regular command. For many drivers
those need to be handled different.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 298d6e3..d12f198 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -530,7 +530,7 @@
unsigned int next_set;
};
-static void blk_mq_rq_timed_out(struct request *req)
+static void blk_mq_rq_timed_out(struct request *req, bool reserved)
{
struct blk_mq_ops *ops = req->q->mq_ops;
enum blk_eh_timer_return ret = BLK_EH_RESET_TIMER;
@@ -548,7 +548,7 @@
return;
if (ops->timeout)
- ret = ops->timeout(req);
+ ret = ops->timeout(req, reserved);
switch (ret) {
case BLK_EH_HANDLED:
@@ -576,7 +576,7 @@
if (time_after_eq(jiffies, rq->deadline)) {
if (!blk_mark_rq_complete(rq))
- blk_mq_rq_timed_out(rq);
+ blk_mq_rq_timed_out(rq, reserved);
} else if (!data->next_set || time_after(data->next, rq->deadline)) {
data->next = rq->deadline;
data->next_set = 1;
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 73ce7d2..86b1156 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1932,6 +1932,14 @@
return ret;
}
+static enum blk_eh_timer_return scsi_timeout(struct request *req,
+ bool reserved)
+{
+ if (reserved)
+ return BLK_EH_RESET_TIMER;
+ return scsi_times_out(req);
+}
+
static int scsi_init_request(void *data, struct request *rq,
unsigned int hctx_idx, unsigned int request_idx,
unsigned int numa_node)
@@ -2043,7 +2051,7 @@
.map_queue = blk_mq_map_queue,
.queue_rq = scsi_queue_rq,
.complete = scsi_softirq_done,
- .timeout = scsi_times_out,
+ .timeout = scsi_timeout,
.init_request = scsi_init_request,
.exit_request = scsi_exit_request,
};
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 0eb0f64..3253495 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -79,6 +79,7 @@
typedef int (queue_rq_fn)(struct blk_mq_hw_ctx *, struct request *, bool);
typedef struct blk_mq_hw_ctx *(map_queue_fn)(struct request_queue *, const int);
+typedef enum blk_eh_timer_return (timeout_fn)(struct request *, bool);
typedef int (init_hctx_fn)(struct blk_mq_hw_ctx *, void *, unsigned int);
typedef void (exit_hctx_fn)(struct blk_mq_hw_ctx *, unsigned int);
typedef int (init_request_fn)(void *, struct request *, unsigned int,
@@ -103,7 +104,7 @@
/*
* Called on request timeout
*/
- rq_timed_out_fn *timeout;
+ timeout_fn *timeout;
softirq_done_fn *complete;