[PATCH 06/14] blk-mq: add 'type' attribute to the sysfs hctx directory
From: Jens Axboe <axboe@kernel.dk>
Date: 2018-10-29 16:37:58
Also in:
linux-scsi, lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
It can be useful for a user to verify what type a given hardware queue is, expose this information in sysfs. Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> --- block/blk-mq-sysfs.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index aafb44224c89..2d737f9e7ba7 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c@@ -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, };
--
2.17.1