Commit 65cd1d13 authored by Weiping Zhang's avatar Weiping Zhang Committed by Jens Axboe
Browse files

block: add io timeout to sysfs 



Give a interface to adjust io timeout(ms) by device.

Signed-off-by: default avatarWeiping Zhang <zhangweiping@didiglobal.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 94a2c3a3

block/blk-sysfs.c

+27 −0
Original line number Diff line number Diff line
@@ -417,6 +417,26 @@ static ssize_t queue_poll_store(struct request_queue *q, const char *page, 
	return ret;

}



static ssize_t queue_io_timeout_show(struct request_queue *q, char *page)

{

	return sprintf(page, "%u\n", jiffies_to_msecs(q->rq_timeout));

}



static ssize_t queue_io_timeout_store(struct request_queue *q, const char *page,

				  size_t count)

{

	unsigned int val;

	int err;



	err = kstrtou32(page, 10, &val);

	if (err || val == 0)

		return -EINVAL;



	blk_queue_rq_timeout(q, msecs_to_jiffies(val));



	return count;

}



static ssize_t queue_wb_lat_show(struct request_queue *q, char *page)

{

	if (!wbt_rq_qos(q))
@@ -685,6 +705,12 @@ static struct queue_sysfs_entry queue_dax_entry = { 
	.show = queue_dax_show,

};



static struct queue_sysfs_entry queue_io_timeout_entry = {

	.attr = {.name = "io_timeout", .mode = 0644 },

	.show = queue_io_timeout_show,

	.store = queue_io_timeout_store,

};



static struct queue_sysfs_entry queue_wb_lat_entry = {

	.attr = {.name = "wbt_lat_usec", .mode = 0644 },

	.show = queue_wb_lat_show,
@@ -734,6 +760,7 @@ static struct attribute *default_attrs[] = { 
	&queue_dax_entry.attr,

	&queue_wb_lat_entry.attr,

	&queue_poll_delay_entry.attr,

	&queue_io_timeout_entry.attr,

#ifdef CONFIG_BLK_DEV_THROTTLING_LOW

	&throtl_sample_time_entry.attr,

#endif