linux-kernel - [RFC V5 08/16] blk/rq-qos: export the sysfs for switching qos

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Date:   Thu, 24 Feb 2022 17:06:46 +0800
From:   "Wang Jianchao (Kuaishou)" <jianchao.wan9@...il.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Josef Bacik <jbacik@...com>, Tejun Heo <tj@...nel.org>,
        Bart Van Assche <bvanassche@....org>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC V5 08/16] blk/rq-qos: export the sysfs for switching qos

All of the blk-rq-qos policies has been changed to use the new
interfaces. Thus we can export the sysfs interface, namely
/sys/block/xxx/queue/qos

Signed-off-by: Wang Jianchao (Kuaishou) <jianchao.wan9@...il.com>
---
 block/blk-sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index c713d6b305cc..052b5f03fc73 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -572,6 +572,7 @@ QUEUE_RO_ENTRY(queue_max_segments, "max_segments");
 QUEUE_RO_ENTRY(queue_max_integrity_segments, "max_integrity_segments");
 QUEUE_RO_ENTRY(queue_max_segment_size, "max_segment_size");
 QUEUE_RW_ENTRY(elv_iosched, "scheduler");
+QUEUE_RW_ENTRY(queue_qos, "qos");
 
 QUEUE_RO_ENTRY(queue_logical_block_size, "logical_block_size");
 QUEUE_RO_ENTRY(queue_physical_block_size, "physical_block_size");
@@ -631,6 +632,7 @@ static struct attribute *queue_attrs[] = {
 	&queue_max_integrity_segments_entry.attr,
 	&queue_max_segment_size_entry.attr,
 	&elv_iosched_entry.attr,
+	&queue_qos_entry.attr,
 	&queue_hw_sector_size_entry.attr,
 	&queue_logical_block_size_entry.attr,
 	&queue_physical_block_size_entry.attr,
-- 
2.17.1