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| author | Omar Sandoval <osandov@fb.com> | 2017-05-04 08:24:40 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-05-04 08:24:40 -0600 |
| commit | d332ce091813d11a46144354baa72b755833392f (patch) | |
| tree | c6f567b7ffea6dc4abf66cd49e2f94d7a9a49410 /block/blk-mq-debugfs.h | |
| parent | 9c1051aacde828073dbbab5e8e59c0fc802efa9a (diff) | |
| download | lwn-d332ce091813d11a46144354baa72b755833392f.tar.gz lwn-d332ce091813d11a46144354baa72b755833392f.zip | |
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 <osandov@fb.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Add missing seq_file.h header in blk-mq-debugfs.h
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-debugfs.h')
| -rw-r--r-- | block/blk-mq-debugfs.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/block/blk-mq-debugfs.h b/block/blk-mq-debugfs.h index 596e9b16d3d1..a5ac21c81ea3 100644 --- a/block/blk-mq-debugfs.h +++ b/block/blk-mq-debugfs.h @@ -2,6 +2,18 @@ #define INT_BLK_MQ_DEBUGFS_H #ifdef CONFIG_BLK_DEBUG_FS + +#include <linux/seq_file.h> + +struct blk_mq_debugfs_attr { + const char *name; + umode_t mode; + int (*show)(void *, struct seq_file *); + ssize_t (*write)(void *, const char __user *, size_t, loff_t *); + /* Set either .show or .seq_ops. */ + const struct seq_operations *seq_ops; +}; + int blk_mq_debugfs_register(struct request_queue *q); void blk_mq_debugfs_unregister(struct request_queue *q); int blk_mq_debugfs_register_hctx(struct request_queue *q, @@ -9,6 +21,12 @@ int blk_mq_debugfs_register_hctx(struct request_queue *q, void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx); int blk_mq_debugfs_register_hctxs(struct request_queue *q); void blk_mq_debugfs_unregister_hctxs(struct request_queue *q); + +int blk_mq_debugfs_register_sched(struct request_queue *q); +void blk_mq_debugfs_unregister_sched(struct request_queue *q); +int blk_mq_debugfs_register_sched_hctx(struct request_queue *q, + struct blk_mq_hw_ctx *hctx); +void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx); #else static inline int blk_mq_debugfs_register(struct request_queue *q) { @@ -37,6 +55,25 @@ static inline int blk_mq_debugfs_register_hctxs(struct request_queue *q) static inline void blk_mq_debugfs_unregister_hctxs(struct request_queue *q) { } + +static inline int blk_mq_debugfs_register_sched(struct request_queue *q) +{ + return 0; +} + +static inline void blk_mq_debugfs_unregister_sched(struct request_queue *q) +{ +} + +static inline int blk_mq_debugfs_register_sched_hctx(struct request_queue *q, + struct blk_mq_hw_ctx *hctx) +{ + return 0; +} + +static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx) +{ +} #endif #endif |