blk-mq: add 'type' attribute to the sysfs hctx directory (a783b818) · Commits · 戴 / test

It can be useful for a user to verify what type a given hardware queue is, expose this information in sysfs. Reviewed-by:

block/blk-mq-sysfs.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -161,6 +161,11 @@ static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx hctx, char page)
		return ret;
		}

		static ssize_t blk_mq_hw_sysfs_type_show(struct blk_mq_hw_ctx hctx, char page)
		{
		return sprintf(page, "%u\n", hctx->type);
		}

		static struct attribute *default_ctx_attrs[] = {
		NULL,
		};
		@@ -177,11 +182,16 @@ static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_cpus = {
		.attr = {.name = "cpu_list", .mode = 0444 },
		.show = blk_mq_hw_sysfs_cpus_show,
		};
		static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_type = {
		.attr = {.name = "type", .mode = 0444 },
		.show = blk_mq_hw_sysfs_type_show,
		};

		static struct attribute *default_hw_ctx_attrs[] = {
		&blk_mq_hw_sysfs_nr_tags.attr,
		&blk_mq_hw_sysfs_nr_reserved_tags.attr,
		&blk_mq_hw_sysfs_cpus.attr,
		&blk_mq_hw_sysfs_type.attr,
		NULL,
		};