From d332ce091813d11a46144354baa72b755833392f Mon Sep 17 00:00:00 2001 From: Omar Sandoval Date: Thu, 4 May 2017 08:24:40 -0600 Subject: blk-mq-debugfs: allow schedulers to register debugfs attributes This provides the infrastructure for schedulers to expose their internal state through debugfs. We add a list of queue attributes and a list of hctx attributes to struct elevator_type and wire them up when switching schedulers. Signed-off-by: Omar Sandoval Reviewed-by: Hannes Reinecke Add missing seq_file.h header in blk-mq-debugfs.h Signed-off-by: Jens Axboe --- include/linux/blk-mq.h | 1 + include/linux/blkdev.h | 1 + include/linux/elevator.h | 7 +++++++ 3 files changed, 9 insertions(+) (limited to 'include/linux') diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index de8ed9aaa156..c47aa248c640 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -60,6 +60,7 @@ struct blk_mq_hw_ctx { #ifdef CONFIG_BLK_DEBUG_FS struct dentry *debugfs_dir; + struct dentry *sched_debugfs_dir; #endif }; diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index b49a79a29e58..80ae958717a1 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -579,6 +579,7 @@ struct request_queue { #ifdef CONFIG_BLK_DEBUG_FS struct dentry *debugfs_dir; + struct dentry *sched_debugfs_dir; #endif bool mq_sysfs_init_done; diff --git a/include/linux/elevator.h b/include/linux/elevator.h index d44840368ee7..9ec5e22846e0 100644 --- a/include/linux/elevator.h +++ b/include/linux/elevator.h @@ -8,6 +8,9 @@ struct io_cq; struct elevator_type; +#ifdef CONFIG_BLK_DEBUG_FS +struct blk_mq_debugfs_attr; +#endif /* * Return values from elevator merger @@ -144,6 +147,10 @@ struct elevator_type char elevator_name[ELV_NAME_MAX]; struct module *elevator_owner; bool uses_mq; +#ifdef CONFIG_BLK_DEBUG_FS + const struct blk_mq_debugfs_attr *queue_debugfs_attrs; + const struct blk_mq_debugfs_attr *hctx_debugfs_attrs; +#endif /* managed by elevator core */ char icq_cache_name[ELV_NAME_MAX + 5]; /* elvname + "_io_cq" */ -- cgit v1.2.3