cregit-Linux how code gets into the kernel

Release 4.14 tools/virtio/virtio-trace/trace-agent.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __TRACE_AGENT_H__

#define __TRACE_AGENT_H__
#include <pthread.h>
#include <stdbool.h>

#define MAX_CPUS	256

#define PIPE_INIT       (1024*1024)

 * agent_info - structure managing total information of guest agent
 * @pipe_size:  size of pipe (default 1MB)
 * @use_stdout: set to true when o option is added (default false)
 * @cpus:       total number of CPUs
 * @ctl_fd:     fd of control path, /dev/virtio-ports/agent-ctl-path
 * @rw_ti:      structure managing information of read/write threads

struct agent_info {
unsigned long pipe_size;
bool use_stdout;
int cpus;
int ctl_fd;
struct rw_thread_info *rw_ti[MAX_CPUS];

 * rw_thread_info - structure managing a read/write thread a cpu
 * @cpu_num:    cpu number operating this read/write thread
 * @in_fd:      fd of reading trace data path in cpu_num
 * @out_fd:     fd of writing trace data path in cpu_num
 * @read_pipe:  fd of read pipe
 * @write_pipe: fd of write pipe
 * @pipe_size:  size of pipe (default 1MB)

struct rw_thread_info {
int cpu_num;
int in_fd;
int out_fd;
int read_pipe;
int write_pipe;
unsigned long pipe_size;

/* use for stopping rw threads */
extern bool global_sig_receive;

/* use for notification */
extern bool global_run_operation;
extern pthread_mutex_t mutex_notify;
extern pthread_cond_t cond_wakeup;

/* for controller of read/write threads */
extern int rw_ctl_init(const char *ctl_path);
extern void *rw_ctl_loop(int ctl_fd);

/* for trace read/write thread */
extern void *rw_thread_info_new(void);
extern void *rw_thread_init(int cpu, const char *in_path, const char *out_path,
			bool stdout_flag, unsigned long pipe_size,
			struct rw_thread_info *rw_ti);
extern pthread_t rw_thread_run(struct rw_thread_info *rw_ti);

static inline void *zalloc(size_t size) { return calloc(1, size); }


Yoshihiro Yunomae19100.00%1100.00%

#define pr_err(format, ...) fprintf(stderr, format, ## __VA_ARGS__) #define pr_info(format, ...) fprintf(stdout, format, ## __VA_ARGS__) #ifdef DEBUG #define pr_debug(format, ...) fprintf(stderr, format, ## __VA_ARGS__) #else #define pr_debug(format, ...) do {} while (0) #endif #endif /*__TRACE_AGENT_H__*/

Overall Contributors

Yoshihiro Yunomae22599.56%150.00%
Greg Kroah-Hartman10.44%150.00%
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