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 */
17 struct 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 */
34 struct 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 */
44 extern bool global_sig_receive;
45
46 /* use for notification */
47 extern bool global_run_operation;
48 extern pthread_mutex_t mutex_notify;
49 extern pthread_cond_t cond_wakeup;
50
51 /* for controller of read/write threads */
52 extern int rw_ctl_init(const char *ctl_path);
53 extern void *rw_ctl_loop(int ctl_fd);
54
55 /* for trace read/write thread */
56 extern void *rw_thread_info_new(void);
57 extern 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);
60 extern pthread_t rw_thread_run(struct rw_thread_info *rw_ti);
61
zalloc(size_t size)62 static 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