1 /* SPDX-License-Identifier: GPL-2.0 */
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
zalloc(size_t size)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__*/
77