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1 #ifndef BLOCK_H |
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2 #define BLOCK_H |
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3 |
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4 #include "qemu-aio.h" |
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5 |
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6 /* block.c */ |
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7 typedef struct BlockDriver BlockDriver; |
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8 |
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9 extern BlockDriver bdrv_raw; |
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10 extern BlockDriver bdrv_host_device; |
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11 extern BlockDriver bdrv_cow; |
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12 extern BlockDriver bdrv_qcow; |
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13 extern BlockDriver bdrv_vmdk; |
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14 extern BlockDriver bdrv_cloop; |
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15 extern BlockDriver bdrv_dmg; |
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16 extern BlockDriver bdrv_bochs; |
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17 extern BlockDriver bdrv_vpc; |
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18 extern BlockDriver bdrv_vvfat; |
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19 extern BlockDriver bdrv_qcow2; |
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20 extern BlockDriver bdrv_parallels; |
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21 extern BlockDriver bdrv_nbd; |
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22 |
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23 typedef struct BlockDriverInfo { |
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24 /* in bytes, 0 if irrelevant */ |
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25 int cluster_size; |
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26 /* offset at which the VM state can be saved (0 if not possible) */ |
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27 int64_t vm_state_offset; |
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28 } BlockDriverInfo; |
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29 |
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30 typedef struct QEMUSnapshotInfo { |
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31 char id_str[128]; /* unique snapshot id */ |
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32 /* the following fields are informative. They are not needed for |
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33 the consistency of the snapshot */ |
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34 char name[256]; /* user choosen name */ |
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35 uint32_t vm_state_size; /* VM state info size */ |
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36 uint32_t date_sec; /* UTC date of the snapshot */ |
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37 uint32_t date_nsec; |
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38 uint64_t vm_clock_nsec; /* VM clock relative to boot */ |
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39 } QEMUSnapshotInfo; |
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40 |
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41 #define BDRV_O_RDONLY 0x0000 |
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42 #define BDRV_O_RDWR 0x0002 |
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43 #define BDRV_O_ACCESS 0x0003 |
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44 #define BDRV_O_CREAT 0x0004 /* create an empty file */ |
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45 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ |
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46 #define BDRV_O_FILE 0x0010 /* open as a raw file (do not try to |
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47 use a disk image format on top of |
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48 it (default for |
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49 bdrv_file_open()) */ |
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50 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ |
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51 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ |
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52 #define BDRV_O_CACHE_DEF 0x0080 /* use default caching */ |
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53 |
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54 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_CACHE_DEF) |
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55 |
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56 void bdrv_info(void); |
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57 void bdrv_info_stats(void); |
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58 |
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59 void bdrv_init(void); |
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60 BlockDriver *bdrv_find_format(const char *format_name); |
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61 int bdrv_create(BlockDriver *drv, |
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62 const char *filename, int64_t size_in_sectors, |
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63 const char *backing_file, int flags); |
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64 BlockDriverState *bdrv_new(const char *device_name); |
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65 void bdrv_delete(BlockDriverState *bs); |
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66 int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags); |
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67 int bdrv_open(BlockDriverState *bs, const char *filename, int flags); |
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68 int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
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69 BlockDriver *drv); |
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70 void bdrv_close(BlockDriverState *bs); |
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71 int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
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72 uint8_t *buf, int nb_sectors); |
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73 int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
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74 const uint8_t *buf, int nb_sectors); |
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75 int bdrv_pread(BlockDriverState *bs, int64_t offset, |
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76 void *buf, int count); |
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77 int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
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78 const void *buf, int count); |
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79 int bdrv_truncate(BlockDriverState *bs, int64_t offset); |
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80 int64_t bdrv_getlength(BlockDriverState *bs); |
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81 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); |
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82 void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs); |
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83 int bdrv_commit(BlockDriverState *bs); |
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84 /* async block I/O */ |
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85 typedef struct BlockDriverAIOCB BlockDriverAIOCB; |
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86 typedef void BlockDriverCompletionFunc(void *opaque, int ret); |
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87 |
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88 BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
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89 uint8_t *buf, int nb_sectors, |
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90 BlockDriverCompletionFunc *cb, void *opaque); |
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91 BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
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92 const uint8_t *buf, int nb_sectors, |
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93 BlockDriverCompletionFunc *cb, void *opaque); |
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94 void bdrv_aio_cancel(BlockDriverAIOCB *acb); |
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95 |
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96 int qemu_key_check(BlockDriverState *bs, const char *name); |
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97 |
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98 /* Ensure contents are flushed to disk. */ |
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99 void bdrv_flush(BlockDriverState *bs); |
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100 void bdrv_flush_all(void); |
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101 |
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102 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
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103 int *pnum); |
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104 |
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105 #define BDRV_TYPE_HD 0 |
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106 #define BDRV_TYPE_CDROM 1 |
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107 #define BDRV_TYPE_FLOPPY 2 |
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108 #define BIOS_ATA_TRANSLATION_AUTO 0 |
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109 #define BIOS_ATA_TRANSLATION_NONE 1 |
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110 #define BIOS_ATA_TRANSLATION_LBA 2 |
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111 #define BIOS_ATA_TRANSLATION_LARGE 3 |
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112 #define BIOS_ATA_TRANSLATION_RECHS 4 |
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113 |
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114 void bdrv_set_geometry_hint(BlockDriverState *bs, |
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115 int cyls, int heads, int secs); |
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116 void bdrv_set_type_hint(BlockDriverState *bs, int type); |
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117 void bdrv_set_translation_hint(BlockDriverState *bs, int translation); |
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118 void bdrv_get_geometry_hint(BlockDriverState *bs, |
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119 int *pcyls, int *pheads, int *psecs); |
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120 int bdrv_get_type_hint(BlockDriverState *bs); |
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121 int bdrv_get_translation_hint(BlockDriverState *bs); |
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122 int bdrv_is_removable(BlockDriverState *bs); |
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123 int bdrv_is_read_only(BlockDriverState *bs); |
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124 int bdrv_is_sg(BlockDriverState *bs); |
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125 int bdrv_is_inserted(BlockDriverState *bs); |
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126 int bdrv_media_changed(BlockDriverState *bs); |
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127 int bdrv_is_locked(BlockDriverState *bs); |
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128 void bdrv_set_locked(BlockDriverState *bs, int locked); |
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129 void bdrv_eject(BlockDriverState *bs, int eject_flag); |
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130 void bdrv_set_change_cb(BlockDriverState *bs, |
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131 void (*change_cb)(void *opaque), void *opaque); |
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132 void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size); |
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133 BlockDriverState *bdrv_find(const char *name); |
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134 void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque); |
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135 int bdrv_is_encrypted(BlockDriverState *bs); |
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136 int bdrv_set_key(BlockDriverState *bs, const char *key); |
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137 void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
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138 void *opaque); |
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139 const char *bdrv_get_device_name(BlockDriverState *bs); |
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140 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
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141 const uint8_t *buf, int nb_sectors); |
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142 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); |
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143 |
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144 void bdrv_get_backing_filename(BlockDriverState *bs, |
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145 char *filename, int filename_size); |
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146 int bdrv_snapshot_create(BlockDriverState *bs, |
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147 QEMUSnapshotInfo *sn_info); |
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148 int bdrv_snapshot_goto(BlockDriverState *bs, |
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149 const char *snapshot_id); |
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150 int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id); |
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151 int bdrv_snapshot_list(BlockDriverState *bs, |
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152 QEMUSnapshotInfo **psn_info); |
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153 char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn); |
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154 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); |
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155 |
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156 char *get_human_readable_size(char *buf, int buf_size, int64_t size); |
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157 int path_is_absolute(const char *path); |
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158 void path_combine(char *dest, int dest_size, |
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159 const char *base_path, |
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160 const char *filename); |
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161 |
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162 #endif |