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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 _TAPDISK_MESSAGE_H_
#define _TAPDISK_MESSAGE_H_
#include <inttypes.h>
#include <sys/types.h>
#define TAPDISK_MESSAGE_MAX_PATH_LENGTH 256
#define TAPDISK_MESSAGE_STRING_LENGTH 256
#define TAPDISK_MESSAGE_MAX_MINORS \
((TAPDISK_MESSAGE_MAX_PATH_LENGTH / sizeof(int)) - 1)
#define TAPDISK_MESSAGE_FLAG_SHARED 0x01
#define TAPDISK_MESSAGE_FLAG_RDONLY 0x02
#define TAPDISK_MESSAGE_FLAG_ADD_CACHE 0x04
#define TAPDISK_MESSAGE_FLAG_VHD_INDEX 0x08
#define TAPDISK_MESSAGE_FLAG_LOG_DIRTY 0x10
typedef struct tapdisk_message tapdisk_message_t;
typedef uint8_t tapdisk_message_flag_t;
typedef struct tapdisk_message_image tapdisk_message_image_t;
typedef struct tapdisk_message_params tapdisk_message_params_t;
typedef struct tapdisk_message_string tapdisk_message_string_t;
typedef struct tapdisk_message_response tapdisk_message_response_t;
typedef struct tapdisk_message_minors tapdisk_message_minors_t;
typedef struct tapdisk_message_list tapdisk_message_list_t;
struct tapdisk_message_params {
tapdisk_message_flag_t flags;
uint8_t storage;
uint32_t devnum;
uint32_t domid;
uint16_t path_len;
char path[TAPDISK_MESSAGE_MAX_PATH_LENGTH];
};
struct tapdisk_message_image {
uint64_t sectors;
uint32_t sector_size;
uint32_t info;
};
struct tapdisk_message_string {
char text[TAPDISK_MESSAGE_STRING_LENGTH];
};
struct tapdisk_message_response {
int error;
char message[TAPDISK_MESSAGE_STRING_LENGTH];
};
struct tapdisk_message_minors {
int count;
int list[TAPDISK_MESSAGE_MAX_MINORS];
};
struct tapdisk_message_list {
int count;
int minor;
int state;
char path[TAPDISK_MESSAGE_MAX_PATH_LENGTH];
};
struct tapdisk_message {
uint16_t type;
uint16_t cookie;
union {
pid_t tapdisk_pid;
tapdisk_message_image_t image;
tapdisk_message_params_t params;
tapdisk_message_string_t string;
tapdisk_message_minors_t minors;
tapdisk_message_response_t response;
tapdisk_message_list_t list;
} u;
};
enum tapdisk_message_id {
TAPDISK_MESSAGE_ERROR = 1,
TAPDISK_MESSAGE_RUNTIME_ERROR,
TAPDISK_MESSAGE_PID,
TAPDISK_MESSAGE_PID_RSP,
TAPDISK_MESSAGE_ATTACH,
TAPDISK_MESSAGE_ATTACH_RSP,
TAPDISK_MESSAGE_OPEN,
TAPDISK_MESSAGE_OPEN_RSP,
TAPDISK_MESSAGE_PAUSE,
TAPDISK_MESSAGE_PAUSE_RSP,
TAPDISK_MESSAGE_RESUME,
TAPDISK_MESSAGE_RESUME_RSP,
TAPDISK_MESSAGE_CLOSE,
TAPDISK_MESSAGE_CLOSE_RSP,
TAPDISK_MESSAGE_DETACH,
TAPDISK_MESSAGE_DETACH_RSP,
TAPDISK_MESSAGE_LIST_MINORS,
TAPDISK_MESSAGE_LIST_MINORS_RSP,
TAPDISK_MESSAGE_LIST,
TAPDISK_MESSAGE_LIST_RSP,
TAPDISK_MESSAGE_FORCE_SHUTDOWN,
TAPDISK_MESSAGE_EXIT,
};
static inline char *
tapdisk_message_name(enum tapdisk_message_id id)
{
switch (id) {
case TAPDISK_MESSAGE_ERROR:
return "error";
case TAPDISK_MESSAGE_PID:
return "pid";
case TAPDISK_MESSAGE_PID_RSP:
return "pid response";
case TAPDISK_MESSAGE_OPEN:
return "open";
case TAPDISK_MESSAGE_OPEN_RSP:
return "open response";
case TAPDISK_MESSAGE_PAUSE:
return "pause";
case TAPDISK_MESSAGE_PAUSE_RSP:
return "pause response";
case TAPDISK_MESSAGE_RESUME:
return "resume";
case TAPDISK_MESSAGE_RESUME_RSP:
return "resume response";
case TAPDISK_MESSAGE_CLOSE:
return "close";
case TAPDISK_MESSAGE_FORCE_SHUTDOWN:
return "force shutdown";
case TAPDISK_MESSAGE_CLOSE_RSP:
return "close response";
case TAPDISK_MESSAGE_ATTACH:
return "attach";
case TAPDISK_MESSAGE_ATTACH_RSP:
return "attach response";
case TAPDISK_MESSAGE_DETACH:
return "detach";
case TAPDISK_MESSAGE_DETACH_RSP:
return "detach response";
case TAPDISK_MESSAGE_LIST_MINORS:
return "list minors";
case TAPDISK_MESSAGE_LIST_MINORS_RSP:
return "list minors response";
case TAPDISK_MESSAGE_LIST:
return "list";
case TAPDISK_MESSAGE_LIST_RSP:
return "list response";
case TAPDISK_MESSAGE_EXIT:
return "exit";
default:
return "unknown";
}
}
#endif
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