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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 9325 | Boppan | 1 | #include |
| 2 | #include |
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| 3 | #include |
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| 4 | #include |
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| 9337 | Boppan | 5 | |
| 9325 | Boppan | 6 | #include "umka.h" |
| 7 | #include "trace.h" |
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| 8 | #include "vdisk.h" |
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| 9 | |||
| 10 | typedef struct { |
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| 11 | FILE *file; |
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| 12 | uint32_t sect_size; |
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| 13 | uint64_t sect_cnt; |
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| 14 | unsigned cache_size; |
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| 15 | int adjust_cache_size; |
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| 16 | } vdisk_t; |
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| 17 | |||
| 18 | void *vdisk_init(const char *fname, int adjust_cache_size, size_t cache_size) { |
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| 19 | FILE *f = fopen(fname, "r+"); |
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| 20 | if (!f) { |
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| 21 | printf("vdisk: can't open file '%s': %s\n", fname, strerror(errno)); |
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| 22 | return NULL; |
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| 23 | } |
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| 9342 | Boppan | 24 | fseek(f, 0, SEEK_END); |
| 25 | off_t fsize = ftell(f); |
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| 26 | fseek(f, 0, SEEK_SET); |
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| 9325 | Boppan | 27 | size_t sect_size = 512; |
| 28 | if (strstr(fname, "s4096") != NULL || strstr(fname, "s4k") != NULL) { |
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| 29 | sect_size = 4096; |
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| 30 | } |
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| 31 | vdisk_t *vdisk = (vdisk_t*)malloc(sizeof(vdisk_t)); |
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| 32 | *vdisk = (vdisk_t){.file = f, |
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| 33 | .sect_size = sect_size, |
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| 34 | .sect_cnt = (uint64_t)fsize / sect_size, |
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| 35 | .cache_size = cache_size, |
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| 36 | .adjust_cache_size = adjust_cache_size}; |
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| 37 | return vdisk; |
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| 38 | } |
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| 39 | |||
| 40 | STDCALL void |
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| 41 | vdisk_close(void *userdata) { |
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| 42 | COVERAGE_OFF(); |
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| 43 | vdisk_t *vdisk = userdata; |
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| 44 | fclose(vdisk->file); |
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| 45 | free(vdisk); |
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| 46 | COVERAGE_ON(); |
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| 47 | } |
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| 48 | |||
| 49 | STDCALL int |
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| 50 | vdisk_read(void *userdata, void *buffer, off_t startsector, |
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| 51 | size_t *numsectors) { |
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| 52 | COVERAGE_OFF(); |
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| 53 | vdisk_t *vdisk = userdata; |
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| 9342 | Boppan | 54 | fseek(vdisk->file, startsector * vdisk->sect_size, SEEK_SET); |
| 9325 | Boppan | 55 | fread(buffer, *numsectors * vdisk->sect_size, 1, vdisk->file); |
| 56 | COVERAGE_ON(); |
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| 57 | return ERROR_SUCCESS; |
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| 58 | } |
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| 59 | |||
| 60 | STDCALL int |
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| 61 | vdisk_write(void *userdata, void *buffer, off_t startsector, |
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| 62 | size_t *numsectors) { |
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| 63 | COVERAGE_OFF(); |
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| 64 | vdisk_t *vdisk = userdata; |
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| 9342 | Boppan | 65 | fseek(vdisk->file, startsector * vdisk->sect_size, SEEK_SET); |
| 9325 | Boppan | 66 | fwrite(buffer, *numsectors * vdisk->sect_size, 1, vdisk->file); |
| 67 | COVERAGE_ON(); |
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| 68 | return ERROR_SUCCESS; |
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| 69 | } |
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| 70 | |||
| 71 | STDCALL int |
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| 72 | vdisk_querymedia(void *userdata, diskmediainfo_t *minfo) { |
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| 73 | COVERAGE_OFF(); |
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| 74 | vdisk_t *vdisk = userdata; |
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| 75 | minfo->flags = 0u; |
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| 76 | minfo->sector_size = vdisk->sect_size; |
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| 77 | minfo->capacity = vdisk->sect_cnt; |
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| 78 | COVERAGE_ON(); |
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| 79 | return ERROR_SUCCESS; |
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| 80 | } |
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| 81 | |||
| 82 | STDCALL size_t |
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| 83 | vdisk_adjust_cache_size(void *userdata, size_t suggested_size) { |
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| 84 | vdisk_t *vdisk = userdata; |
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| 85 | if (vdisk->adjust_cache_size) { |
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| 86 | return vdisk->cache_size; |
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| 87 | } else { |
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| 88 | return suggested_size; |
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| 89 | } |
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| 90 | } |
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| 91 | |||
| 92 | diskfunc_t vdisk_functions = { |
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| 93 | .strucsize = sizeof(diskfunc_t), |
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| 94 | .close = vdisk_close, |
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| 95 | .closemedia = NULL, |
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| 96 | .querymedia = vdisk_querymedia, |
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| 97 | .read = vdisk_read, |
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| 98 | .write = vdisk_write, |
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| 99 | .flush = NULL, |
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| 100 | .adjust_cache_size = vdisk_adjust_cache_size, |
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| 101 | }; |