1 | /* |
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2 | * QEMU System Emulator block driver |
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3 | * |
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4 | * Copyright (c) 2003 Fabrice Bellard |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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7 | * of this software and associated documentation files (the "Software"), to deal |
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8 | * in the Software without restriction, including without limitation the rights |
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9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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10 | * copies of the Software, and to permit persons to whom the Software is |
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11 | * furnished to do so, subject to the following conditions: |
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12 | * |
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13 | * The above copyright notice and this permission notice shall be included in |
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14 | * all copies or substantial portions of the Software. |
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15 | * |
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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22 | * THE SOFTWARE. |
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23 | */ |
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24 | #ifndef BLOCK_INT_H |
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25 | #define BLOCK_INT_H |
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26 | |
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27 | struct BlockDriver { |
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28 | const char *format_name; |
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29 | int instance_size; |
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30 | int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename); |
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31 | int (*bdrv_open)(BlockDriverState *bs, const char *filename); |
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32 | int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num, |
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33 | uint8_t *buf, int nb_sectors); |
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34 | int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num, |
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35 | const uint8_t *buf, int nb_sectors); |
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36 | void (*bdrv_close)(BlockDriverState *bs); |
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37 | int (*bdrv_create)(const char *filename, int64_t total_sectors, |
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38 | const char *backing_file, int flags); |
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39 | void (*bdrv_flush)(BlockDriverState *bs); |
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40 | int (*bdrv_is_allocated)(BlockDriverState *bs, int64_t sector_num, |
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41 | int nb_sectors, int *pnum); |
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42 | int (*bdrv_set_key)(BlockDriverState *bs, const char *key); |
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43 | int (*bdrv_make_empty)(BlockDriverState *bs); |
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44 | struct BlockDriver *next; |
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45 | }; |
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46 | |
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47 | struct BlockDriverState { |
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48 | int64_t total_sectors; |
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49 | int read_only; /* if true, the media is read only */ |
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50 | int inserted; /* if true, the media is present */ |
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51 | int removable; /* if true, the media can be removed */ |
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52 | int locked; /* if true, the media cannot temporarily be ejected */ |
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53 | int encrypted; /* if true, the media is encrypted */ |
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54 | /* event callback when inserting/removing */ |
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55 | void (*change_cb)(void *opaque); |
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56 | void *change_opaque; |
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57 | |
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58 | BlockDriver *drv; |
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59 | void *opaque; |
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60 | |
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61 | int boot_sector_enabled; |
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62 | uint8_t boot_sector_data[512]; |
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63 | |
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64 | char filename[1024]; |
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65 | char backing_file[1024]; /* if non zero, the image is a diff of |
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66 | this file image */ |
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67 | int is_temporary; |
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68 | |
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69 | BlockDriverState *backing_hd; |
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70 | |
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71 | /* NOTE: the following infos are only hints for real hardware |
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72 | drivers. They are not used by the block driver */ |
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73 | int cyls, heads, secs, translation; |
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74 | int type; |
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75 | char device_name[32]; |
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76 | BlockDriverState *next; |
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77 | }; |
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78 | |
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79 | void get_tmp_filename(char *filename, int size); |
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80 | |
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81 | #endif /* BLOCK_INT_H */ |
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