tools/virtio/virtio-trace/trace-agent.h

   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__*/