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