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6#ifndef _TRACE_DYNEVENT_H
7#define _TRACE_DYNEVENT_H
8
9#include <linux/kernel.h>
10#include <linux/list.h>
11#include <linux/mutex.h>
12#include <linux/seq_file.h>
13
14#include "trace.h"
15
16struct dyn_event;
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40struct dyn_event_operations {
41 struct list_head list;
42 int (*create)(int argc, const char *argv[]);
43 int (*show)(struct seq_file *m, struct dyn_event *ev);
44 bool (*is_busy)(struct dyn_event *ev);
45 int (*free)(struct dyn_event *ev);
46 bool (*match)(const char *system, const char *event,
47 int argc, const char **argv, struct dyn_event *ev);
48};
49
50
51int dyn_event_register(struct dyn_event_operations *ops);
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61struct dyn_event {
62 struct list_head list;
63 struct dyn_event_operations *ops;
64};
65
66extern struct list_head dyn_event_list;
67
68static inline
69int dyn_event_init(struct dyn_event *ev, struct dyn_event_operations *ops)
70{
71 if (!ev || !ops)
72 return -EINVAL;
73
74 INIT_LIST_HEAD(&ev->list);
75 ev->ops = ops;
76 return 0;
77}
78
79static inline int dyn_event_add(struct dyn_event *ev)
80{
81 lockdep_assert_held(&event_mutex);
82
83 if (!ev || !ev->ops)
84 return -EINVAL;
85
86 list_add_tail(&ev->list, &dyn_event_list);
87 return 0;
88}
89
90static inline void dyn_event_remove(struct dyn_event *ev)
91{
92 lockdep_assert_held(&event_mutex);
93 list_del_init(&ev->list);
94}
95
96void *dyn_event_seq_start(struct seq_file *m, loff_t *pos);
97void *dyn_event_seq_next(struct seq_file *m, void *v, loff_t *pos);
98void dyn_event_seq_stop(struct seq_file *m, void *v);
99int dyn_events_release_all(struct dyn_event_operations *type);
100int dyn_event_release(int argc, char **argv, struct dyn_event_operations *type);
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109#define for_each_dyn_event(pos) \
110 list_for_each_entry(pos, &dyn_event_list, list)
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116
117#define for_each_dyn_event_safe(pos, n) \
118 list_for_each_entry_safe(pos, n, &dyn_event_list, list)
119
120extern void dynevent_cmd_init(struct dynevent_cmd *cmd, char *buf, int maxlen,
121 enum dynevent_type type,
122 dynevent_create_fn_t run_command);
123
124typedef int (*dynevent_check_arg_fn_t)(void *data);
125
126struct dynevent_arg {
127 const char *str;
128 char separator;
129};
130
131extern void dynevent_arg_init(struct dynevent_arg *arg,
132 char separator);
133extern int dynevent_arg_add(struct dynevent_cmd *cmd,
134 struct dynevent_arg *arg,
135 dynevent_check_arg_fn_t check_arg);
136
137struct dynevent_arg_pair {
138 const char *lhs;
139 const char *rhs;
140 char operator;
141 char separator;
142};
143
144extern void dynevent_arg_pair_init(struct dynevent_arg_pair *arg_pair,
145 char operator, char separator);
146
147extern int dynevent_arg_pair_add(struct dynevent_cmd *cmd,
148 struct dynevent_arg_pair *arg_pair,
149 dynevent_check_arg_fn_t check_arg);
150extern int dynevent_str_add(struct dynevent_cmd *cmd, const char *str);
151
152#endif
153