/usr/include/blktap/tap-ctl.h is in blktap-dev 2.0.90-4+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2008, XenSource Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of XenSource Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __TAP_CTL_H__
#define __TAP_CTL_H__
#include <syslog.h>
#include <errno.h>
#include <sys/time.h>
#include <tapdisk-message.h>
#include <list.h>
extern int tap_ctl_debug;
#ifdef TAPCTL
#define DBG(_f, _a...) \
do { \
if (tap_ctl_debug) \
printf(_f, ##_a); \
} while (0)
#define DPRINTF(_f, _a...) syslog(LOG_INFO, _f, ##_a)
#define EPRINTF(_f, _a...) syslog(LOG_ERR, "tap-err:%s: " _f, __func__, ##_a)
#define PERROR(_f, _a...) syslog(LOG_ERR, "tap-err:%s: " _f ": %s", __func__, ##_a, \
strerror(errno))
#endif
void tap_ctl_version(int *major, int *minor);
int tap_ctl_kernel_version(int *major, int *minor);
int tap_ctl_check_blktap(const char **message);
int tap_ctl_check_version(const char **message);
int tap_ctl_check(const char **message);
int tap_ctl_connect(const char *path, int *socket);
int tap_ctl_connect_id(int id, int *socket);
int tap_ctl_read_raw(int fd, void *buf, size_t sz, struct timeval *timeout);
int tap_ctl_read_message(int fd, tapdisk_message_t *message,
struct timeval *timeout);
int tap_ctl_write_message(int fd, tapdisk_message_t *message,
struct timeval *timeout);
int tap_ctl_send_and_receive(int fd, tapdisk_message_t *message,
struct timeval *timeout);
int tap_ctl_connect_send_and_receive(int id,
tapdisk_message_t *message,
struct timeval *timeout);
char *tap_ctl_socket_name(int id);
typedef struct {
pid_t pid;
int minor;
int state;
char *type;
char *path;
struct list_head entry;
} tap_list_t;
#define tap_list_for_each_entry(_pos, _head) \
list_for_each_entry(_pos, _head, entry)
#define tap_list_for_each_entry_safe(_pos, _n, _head) \
list_for_each_entry_safe(_pos, _n, _head, entry)
int tap_ctl_list(struct list_head *list);
int tap_ctl_list_pid(pid_t pid, struct list_head *list);
void tap_ctl_list_free(struct list_head *list);
int tap_ctl_find_minor(const char *type, const char *path);
int tap_ctl_allocate(int *minor, char **devname);
int tap_ctl_free(const int minor);
int tap_ctl_create(const char *params, char **devname, int flags,
int prt_minor, char *secondary);
int tap_ctl_destroy(const int id, const int minor, int force,
struct timeval *timeout);
int tap_ctl_spawn(void);
pid_t tap_ctl_get_pid(const int id);
int tap_ctl_attach(const int id, const int minor);
int tap_ctl_detach(const int id, const int minor);
int tap_ctl_open(const int id, const int minor, const char *params, int flags,
const int prt_minor, const char *secondary);
int tap_ctl_close(const int id, const int minor, const int force,
struct timeval *timeout);
int tap_ctl_pause(const int id, const int minor, struct timeval *timeout);
int tap_ctl_unpause(const int id, const int minor, const char *params);
ssize_t tap_ctl_stats(pid_t pid, int minor, char *buf, size_t size);
int tap_ctl_stats_fwrite(pid_t pid, int minor, FILE *out);
int tap_ctl_blk_major(void);
#endif
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