xref: /linux/block/blk-mq-debugfs.h (revision d6869352cb3c3cf3450637a52349e2e87c1354aa) 
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_debugfs_attr {
10 	const char *name;
11 	umode_t mode;
12 	int (*show)(void *, struct seq_file *);
13 	ssize_t (*write)(void *, const char __user *, size_t, loff_t *);
14 	/* Set either .show or .seq_ops. */
15 	const struct seq_operations *seq_ops;
16 };
17 
18 int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq);
19 int blk_mq_debugfs_rq_show(struct seq_file *m, void *v);
20 
21 void blk_mq_debugfs_register(struct request_queue *q);
22 void blk_mq_debugfs_unregister(struct request_queue *q);
23 void blk_mq_debugfs_register_hctx(struct request_queue *q,
24 				  struct blk_mq_hw_ctx *hctx);
25 void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx);
26 void blk_mq_debugfs_register_hctxs(struct request_queue *q);
27 void blk_mq_debugfs_unregister_hctxs(struct request_queue *q);
28 
29 void blk_mq_debugfs_register_sched(struct request_queue *q);
30 void blk_mq_debugfs_unregister_sched(struct request_queue *q);
31 void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
32 				       struct blk_mq_hw_ctx *hctx);
33 void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx);
34 
35 void blk_mq_debugfs_register_rqos(struct rq_qos *rqos);
36 void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos);
37 void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q);
38 #else
39 static inline void blk_mq_debugfs_register(struct request_queue *q)
40 {
41 }
42 
43 static inline void blk_mq_debugfs_unregister(struct request_queue *q)
44 {
45 }
46 
47 static inline void blk_mq_debugfs_register_hctx(struct request_queue *q,
48 						struct blk_mq_hw_ctx *hctx)
49 {
50 }
51 
52 static inline void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
53 {
54 }
55 
56 static inline void blk_mq_debugfs_register_hctxs(struct request_queue *q)
57 {
58 }
59 
60 static inline void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
61 {
62 }
63 
64 static inline void blk_mq_debugfs_register_sched(struct request_queue *q)
65 {
66 }
67 
68 static inline void blk_mq_debugfs_unregister_sched(struct request_queue *q)
69 {
70 }
71 
72 static inline void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
73 						      struct blk_mq_hw_ctx *hctx)
74 {
75 }
76 
77 static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
78 {
79 }
80 
81 static inline void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
82 {
83 }
84 
85 static inline void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos)
86 {
87 }
88 
89 static inline void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q)
90 {
91 }
92 #endif
93 
94 #ifdef CONFIG_BLK_DEBUG_FS_ZONED
95 int queue_zone_wlock_show(void *data, struct seq_file *m);
96 #else
97 static inline int queue_zone_wlock_show(void *data, struct seq_file *m)
98 {
99 	return 0;
100 }
101 #endif
102 
103 #endif
104