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142 lines
4.3 KiB
C
142 lines
4.3 KiB
C
/* Copyright (c) 2008, XenSource Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of XenSource Inc. nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TAPDISK_MESSAGE_H_
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#define _TAPDISK_MESSAGE_H_
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#include <inttypes.h>
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#define TAPDISK_MESSAGE_MAX_PATH_LENGTH 256
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#define TAPDISK_MESSAGE_STRING_LENGTH 256
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#define TAPDISK_MESSAGE_FLAG_SHARED 0x01
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#define TAPDISK_MESSAGE_FLAG_RDONLY 0x02
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#define TAPDISK_MESSAGE_FLAG_ADD_CACHE 0x04
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#define TAPDISK_MESSAGE_FLAG_VHD_INDEX 0x08
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#define TAPDISK_MESSAGE_FLAG_LOG_DIRTY 0x10
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typedef struct tapdisk_message tapdisk_message_t;
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typedef uint8_t tapdisk_message_flag_t;
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typedef struct tapdisk_message_image tapdisk_message_image_t;
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typedef struct tapdisk_message_params tapdisk_message_params_t;
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typedef struct tapdisk_message_string tapdisk_message_string_t;
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struct tapdisk_message_params {
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tapdisk_message_flag_t flags;
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uint8_t storage;
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uint32_t devnum;
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uint32_t domid;
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uint16_t path_len;
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char path[TAPDISK_MESSAGE_MAX_PATH_LENGTH];
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};
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struct tapdisk_message_image {
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uint64_t sectors;
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uint32_t sector_size;
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uint32_t info;
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};
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struct tapdisk_message_string {
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char text[TAPDISK_MESSAGE_STRING_LENGTH];
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};
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struct tapdisk_message {
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uint16_t type;
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uint16_t cookie;
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uint16_t drivertype;
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union {
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pid_t tapdisk_pid;
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tapdisk_message_image_t image;
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tapdisk_message_params_t params;
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tapdisk_message_string_t string;
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} u;
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};
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enum tapdisk_message_id {
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TAPDISK_MESSAGE_ERROR = 1,
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TAPDISK_MESSAGE_RUNTIME_ERROR,
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TAPDISK_MESSAGE_PID,
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TAPDISK_MESSAGE_PID_RSP,
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TAPDISK_MESSAGE_OPEN,
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TAPDISK_MESSAGE_OPEN_RSP,
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TAPDISK_MESSAGE_PAUSE,
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TAPDISK_MESSAGE_PAUSE_RSP,
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TAPDISK_MESSAGE_RESUME,
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TAPDISK_MESSAGE_RESUME_RSP,
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TAPDISK_MESSAGE_CLOSE,
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TAPDISK_MESSAGE_CLOSE_RSP,
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TAPDISK_MESSAGE_EXIT,
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};
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static inline char *
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tapdisk_message_name(enum tapdisk_message_id id)
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{
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switch (id) {
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case TAPDISK_MESSAGE_ERROR:
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return "error";
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case TAPDISK_MESSAGE_PID:
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return "pid";
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case TAPDISK_MESSAGE_PID_RSP:
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return "pid response";
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case TAPDISK_MESSAGE_OPEN:
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return "open";
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case TAPDISK_MESSAGE_OPEN_RSP:
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return "open response";
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case TAPDISK_MESSAGE_PAUSE:
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return "pause";
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case TAPDISK_MESSAGE_PAUSE_RSP:
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return "pause response";
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case TAPDISK_MESSAGE_RESUME:
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return "resume";
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case TAPDISK_MESSAGE_RESUME_RSP:
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return "resume response";
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case TAPDISK_MESSAGE_CLOSE:
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return "close";
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case TAPDISK_MESSAGE_CLOSE_RSP:
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return "close response";
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case TAPDISK_MESSAGE_EXIT:
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return "exit";
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default:
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return "unknown";
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}
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}
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#endif
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