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 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