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