vl.h

   1 /*
   2  * QEMU System Emulator header
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #ifndef VL_H
  25 #define VL_H
  26
  27 /* vl.c */
  28 void *get_mmap_addr(unsigned long size);
  29
  30 /* block.c */
  31 typedef struct BlockDriverState BlockDriverState;
  32
  33 BlockDriverState *bdrv_open(const char *filename, int snapshot);
  34 void bdrv_close(BlockDriverState *bs);
  35 int bdrv_read(BlockDriverState *bs, int64_t sector_num,
  36               uint8_t *buf, int nb_sectors);
  37 int bdrv_write(BlockDriverState *bs, int64_t sector_num,
  38                const uint8_t *buf, int nb_sectors);
  39 void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr);
  40 int bdrv_commit(BlockDriverState *bs);
  41
  42 /* user mode linux compatible COW file */
  43 #define COW_MAGIC 0x4f4f4f4d  /* MOOO */
  44 #define COW_VERSION 2
  45
  46 struct cow_header_v2 {
  47     uint32_t magic;
  48     uint32_t  long version;
  49     char backing_file[1024];
  50     int32_t mtime;
  51     uint64_t size;
  52     uint32_t sectorsize;
  53 };
  54
  55 #endif /* VL_H */