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

   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 */
  18struct 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 */
  35struct 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 */
  45extern bool global_sig_receive;
  46
  47/* use for notification */
  48extern bool global_run_operation;
  49extern pthread_mutex_t mutex_notify;
  50extern pthread_cond_t cond_wakeup;
  51
  52/* for controller of read/write threads */
  53extern int rw_ctl_init(const char *ctl_path);
  54extern void *rw_ctl_loop(int ctl_fd);
  55
  56/* for trace read/write thread */
  57extern void *rw_thread_info_new(void);
  58extern 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);
  61extern pthread_t rw_thread_run(struct rw_thread_info *rw_ti);
  62
  63static 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