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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
108fc825 YY |
2 | #ifndef __TRACE_AGENT_H__ |
3 | #define __TRACE_AGENT_H__ | |
4 | #include <pthread.h> | |
5 | #include <stdbool.h> | |
6 | ||
7 | #define MAX_CPUS 256 | |
8 | #define PIPE_INIT (1024*1024) | |
9 | ||
10 | /* | |
11 | * agent_info - structure managing total information of guest agent | |
12 | * @pipe_size: size of pipe (default 1MB) | |
13 | * @use_stdout: set to true when o option is added (default false) | |
14 | * @cpus: total number of CPUs | |
15 | * @ctl_fd: fd of control path, /dev/virtio-ports/agent-ctl-path | |
16 | * @rw_ti: structure managing information of read/write threads | |
17 | */ | |
18 | struct agent_info { | |
19 | unsigned long pipe_size; | |
20 | bool use_stdout; | |
21 | int cpus; | |
22 | int ctl_fd; | |
23 | struct rw_thread_info *rw_ti[MAX_CPUS]; | |
24 | }; | |
25 | ||
26 | /* | |
27 | * rw_thread_info - structure managing a read/write thread a cpu | |
28 | * @cpu_num: cpu number operating this read/write thread | |
29 | * @in_fd: fd of reading trace data path in cpu_num | |
30 | * @out_fd: fd of writing trace data path in cpu_num | |
31 | * @read_pipe: fd of read pipe | |
32 | * @write_pipe: fd of write pipe | |
33 | * @pipe_size: size of pipe (default 1MB) | |
34 | */ | |
35 | struct rw_thread_info { | |
36 | int cpu_num; | |
37 | int in_fd; | |
38 | int out_fd; | |
39 | int read_pipe; | |
40 | int write_pipe; | |
41 | unsigned long pipe_size; | |
42 | }; | |
43 | ||
44 | /* use for stopping rw threads */ | |
45 | extern bool global_sig_receive; | |
46 | ||
47 | /* use for notification */ | |
48 | extern bool global_run_operation; | |
49 | extern pthread_mutex_t mutex_notify; | |
50 | extern pthread_cond_t cond_wakeup; | |
51 | ||
52 | /* for controller of read/write threads */ | |
53 | extern int rw_ctl_init(const char *ctl_path); | |
54 | extern void *rw_ctl_loop(int ctl_fd); | |
55 | ||
56 | /* for trace read/write thread */ | |
57 | extern void *rw_thread_info_new(void); | |
58 | extern void *rw_thread_init(int cpu, const char *in_path, const char *out_path, | |
59 | bool stdout_flag, unsigned long pipe_size, | |
60 | struct rw_thread_info *rw_ti); | |
61 | extern pthread_t rw_thread_run(struct rw_thread_info *rw_ti); | |
62 | ||
63 | static inline void *zalloc(size_t size) | |
64 | { | |
65 | return calloc(1, size); | |
66 | } | |
67 | ||
68 | #define pr_err(format, ...) fprintf(stderr, format, ## __VA_ARGS__) | |
69 | #define pr_info(format, ...) fprintf(stdout, format, ## __VA_ARGS__) | |
70 | #ifdef DEBUG | |
71 | #define pr_debug(format, ...) fprintf(stderr, format, ## __VA_ARGS__) | |
72 | #else | |
73 | #define pr_debug(format, ...) do {} while (0) | |
74 | #endif | |
75 | ||
76 | #endif /*__TRACE_AGENT_H__*/ |