| Yoshihiro YUNOMAE | 108fc82 | 2012-08-09 21:31:30 +0900 | [diff] [blame] | 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 | |
| 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__*/ |