xref: /linux/block/blk-mq-debugfs.h (revision 0a94608f0f7de9b1135ffea3546afe68eafef57f) 
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef INT_BLK_MQ_DEBUGFS_H
3 #define INT_BLK_MQ_DEBUGFS_H
4 
5 #ifdef CONFIG_BLK_DEBUG_FS
6 
7 #include <linux/seq_file.h>
8 
9 struct blk_mq_hw_ctx;
10 
11 struct blk_mq_debugfs_attr {
12 	const char *name;
13 	umode_t mode;
14 	int (*show)(void *, struct seq_file *);
15 	ssize_t (*write)(void *, const char __user *, size_t, loff_t *);
16 	/* Set either .show or .seq_ops. */
17 	const struct seq_operations *seq_ops;
18 };
19 
20 int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq);
21 int blk_mq_debugfs_rq_show(struct seq_file *m, void *v);
22 
23 void blk_mq_debugfs_register(struct request_queue *q);
24 void blk_mq_debugfs_unregister(struct request_queue *q);
25 void blk_mq_debugfs_register_hctx(struct request_queue *q,
26 				  struct blk_mq_hw_ctx *hctx);
27 void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx);
28 void blk_mq_debugfs_register_hctxs(struct request_queue *q);
29 void blk_mq_debugfs_unregister_hctxs(struct request_queue *q);
30 
31 void blk_mq_debugfs_register_sched(struct request_queue *q);
32 void blk_mq_debugfs_unregister_sched(struct request_queue *q);
33 void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
34 				       struct blk_mq_hw_ctx *hctx);
35 void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx);
36 
37 void blk_mq_debugfs_register_rqos(struct rq_qos *rqos);
38 void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos);
39 void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q);
40 #else
41 static inline void blk_mq_debugfs_register(struct request_queue *q)
42 {
43 }
44 
45 static inline void blk_mq_debugfs_unregister(struct request_queue *q)
46 {
47 }
48 
49 static inline void blk_mq_debugfs_register_hctx(struct request_queue *q,
50 						struct blk_mq_hw_ctx *hctx)
51 {
52 }
53 
54 static inline void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
55 {
56 }
57 
58 static inline void blk_mq_debugfs_register_hctxs(struct request_queue *q)
59 {
60 }
61 
62 static inline void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
63 {
64 }
65 
66 static inline void blk_mq_debugfs_register_sched(struct request_queue *q)
67 {
68 }
69 
70 static inline void blk_mq_debugfs_unregister_sched(struct request_queue *q)
71 {
72 }
73 
74 static inline void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
75 						      struct blk_mq_hw_ctx *hctx)
76 {
77 }
78 
79 static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
80 {
81 }
82 
83 static inline void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
84 {
85 }
86 
87 static inline void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos)
88 {
89 }
90 
91 static inline void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q)
92 {
93 }
94 #endif
95 
96 #ifdef CONFIG_BLK_DEBUG_FS_ZONED
97 int queue_zone_wlock_show(void *data, struct seq_file *m);
98 #else
99 static inline int queue_zone_wlock_show(void *data, struct seq_file *m)
100 {
101 	return 0;
102 }
103 #endif
104 
105 #endif
106