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1 | #ifndef BLOCK_H | |
2 | #define BLOCK_H | |
3 | ||
4 | #include "qemu-aio.h" | |
5 | #include "qemu-common.h" | |
6 | #include "qemu-option.h" | |
7 | #include "qobject.h" | |
8 | ||
9 | /* block.c */ | |
10 | typedef struct BlockDriver BlockDriver; | |
11 | ||
12 | typedef struct BlockDriverInfo { | |
13 | /* in bytes, 0 if irrelevant */ | |
14 | int cluster_size; | |
15 | /* offset at which the VM state can be saved (0 if not possible) */ | |
16 | int64_t vm_state_offset; | |
17 | } BlockDriverInfo; | |
18 | ||
19 | typedef struct QEMUSnapshotInfo { | |
20 | char id_str[128]; /* unique snapshot id */ | |
21 | /* the following fields are informative. They are not needed for | |
22 | the consistency of the snapshot */ | |
23 | char name[256]; /* user choosen name */ | |
24 | uint32_t vm_state_size; /* VM state info size */ | |
25 | uint32_t date_sec; /* UTC date of the snapshot */ | |
26 | uint32_t date_nsec; | |
27 | uint64_t vm_clock_nsec; /* VM clock relative to boot */ | |
28 | } QEMUSnapshotInfo; | |
29 | ||
30 | #define BDRV_O_RDWR 0x0002 | |
31 | #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ | |
32 | #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ | |
33 | #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ | |
34 | #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ | |
35 | #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ | |
36 | ||
37 | #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB) | |
38 | ||
39 | #define BDRV_SECTOR_BITS 9 | |
40 | #define BDRV_SECTOR_SIZE (1 << BDRV_SECTOR_BITS) | |
41 | #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1); | |
42 | ||
43 | typedef enum { | |
44 | BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP | |
45 | } BlockMonEventAction; | |
46 | ||
47 | void bdrv_mon_event(const BlockDriverState *bdrv, | |
48 | BlockMonEventAction action, int is_read); | |
49 | void bdrv_info_print(Monitor *mon, const QObject *data); | |
50 | void bdrv_info(Monitor *mon, QObject **ret_data); | |
51 | void bdrv_stats_print(Monitor *mon, const QObject *data); | |
52 | void bdrv_info_stats(Monitor *mon, QObject **ret_data); | |
53 | ||
54 | void bdrv_init(void); | |
55 | void bdrv_init_with_whitelist(void); | |
56 | BlockDriver *bdrv_find_format(const char *format_name); | |
57 | BlockDriver *bdrv_find_whitelisted_format(const char *format_name); | |
58 | int bdrv_create(BlockDriver *drv, const char* filename, | |
59 | QEMUOptionParameter *options); | |
60 | int bdrv_create_file(const char* filename, QEMUOptionParameter *options); | |
61 | BlockDriverState *bdrv_new(const char *device_name); | |
62 | void bdrv_delete(BlockDriverState *bs); | |
63 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags); | |
64 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags, | |
65 | BlockDriver *drv); | |
66 | void bdrv_close(BlockDriverState *bs); | |
67 | int bdrv_check(BlockDriverState *bs); | |
68 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, | |
69 | uint8_t *buf, int nb_sectors); | |
70 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, | |
71 | const uint8_t *buf, int nb_sectors); | |
72 | int bdrv_pread(BlockDriverState *bs, int64_t offset, | |
73 | void *buf, int count); | |
74 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, | |
75 | const void *buf, int count); | |
76 | int bdrv_truncate(BlockDriverState *bs, int64_t offset); | |
77 | int64_t bdrv_getlength(BlockDriverState *bs); | |
78 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); | |
79 | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs); | |
80 | int bdrv_commit(BlockDriverState *bs); | |
81 | int bdrv_change_backing_file(BlockDriverState *bs, | |
82 | const char *backing_file, const char *backing_fmt); | |
83 | void bdrv_register(BlockDriver *bdrv); | |
84 | ||
85 | /* async block I/O */ | |
86 | typedef struct BlockDriverAIOCB BlockDriverAIOCB; | |
87 | typedef void BlockDriverCompletionFunc(void *opaque, int ret); | |
88 | typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, | |
89 | int sector_num); | |
90 | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, | |
91 | QEMUIOVector *iov, int nb_sectors, | |
92 | BlockDriverCompletionFunc *cb, void *opaque); | |
93 | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, | |
94 | QEMUIOVector *iov, int nb_sectors, | |
95 | BlockDriverCompletionFunc *cb, void *opaque); | |
96 | BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, | |
97 | BlockDriverCompletionFunc *cb, void *opaque); | |
98 | void bdrv_aio_cancel(BlockDriverAIOCB *acb); | |
99 | ||
100 | typedef struct BlockRequest { | |
101 | /* Fields to be filled by multiwrite caller */ | |
102 | int64_t sector; | |
103 | int nb_sectors; | |
104 | QEMUIOVector *qiov; | |
105 | BlockDriverCompletionFunc *cb; | |
106 | void *opaque; | |
107 | ||
108 | /* Filled by multiwrite implementation */ | |
109 | int error; | |
110 | } BlockRequest; | |
111 | ||
112 | int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, | |
113 | int num_reqs); | |
114 | ||
115 | /* sg packet commands */ | |
116 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); | |
117 | BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, | |
118 | unsigned long int req, void *buf, | |
119 | BlockDriverCompletionFunc *cb, void *opaque); | |
120 | ||
121 | /* Ensure contents are flushed to disk. */ | |
122 | void bdrv_flush(BlockDriverState *bs); | |
123 | void bdrv_flush_all(void); | |
124 | ||
125 | int bdrv_has_zero_init(BlockDriverState *bs); | |
126 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
127 | int *pnum); | |
128 | ||
129 | #define BDRV_TYPE_HD 0 | |
130 | #define BDRV_TYPE_CDROM 1 | |
131 | #define BDRV_TYPE_FLOPPY 2 | |
132 | #define BIOS_ATA_TRANSLATION_AUTO 0 | |
133 | #define BIOS_ATA_TRANSLATION_NONE 1 | |
134 | #define BIOS_ATA_TRANSLATION_LBA 2 | |
135 | #define BIOS_ATA_TRANSLATION_LARGE 3 | |
136 | #define BIOS_ATA_TRANSLATION_RECHS 4 | |
137 | ||
138 | void bdrv_set_geometry_hint(BlockDriverState *bs, | |
139 | int cyls, int heads, int secs); | |
140 | void bdrv_set_type_hint(BlockDriverState *bs, int type); | |
141 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation); | |
142 | void bdrv_get_geometry_hint(BlockDriverState *bs, | |
143 | int *pcyls, int *pheads, int *psecs); | |
144 | int bdrv_get_type_hint(BlockDriverState *bs); | |
145 | int bdrv_get_translation_hint(BlockDriverState *bs); | |
146 | int bdrv_is_removable(BlockDriverState *bs); | |
147 | int bdrv_is_read_only(BlockDriverState *bs); | |
148 | int bdrv_is_sg(BlockDriverState *bs); | |
149 | int bdrv_enable_write_cache(BlockDriverState *bs); | |
150 | int bdrv_is_inserted(BlockDriverState *bs); | |
151 | int bdrv_media_changed(BlockDriverState *bs); | |
152 | int bdrv_is_locked(BlockDriverState *bs); | |
153 | void bdrv_set_locked(BlockDriverState *bs, int locked); | |
154 | int bdrv_eject(BlockDriverState *bs, int eject_flag); | |
155 | void bdrv_set_change_cb(BlockDriverState *bs, | |
156 | void (*change_cb)(void *opaque), void *opaque); | |
157 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size); | |
158 | BlockDriverState *bdrv_find(const char *name); | |
159 | void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), | |
160 | void *opaque); | |
161 | int bdrv_is_encrypted(BlockDriverState *bs); | |
162 | int bdrv_key_required(BlockDriverState *bs); | |
163 | int bdrv_set_key(BlockDriverState *bs, const char *key); | |
164 | int bdrv_query_missing_keys(void); | |
165 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), | |
166 | void *opaque); | |
167 | const char *bdrv_get_device_name(BlockDriverState *bs); | |
168 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, | |
169 | const uint8_t *buf, int nb_sectors); | |
170 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); | |
171 | ||
172 | const char *bdrv_get_encrypted_filename(BlockDriverState *bs); | |
173 | void bdrv_get_backing_filename(BlockDriverState *bs, | |
174 | char *filename, int filename_size); | |
175 | int bdrv_snapshot_create(BlockDriverState *bs, | |
176 | QEMUSnapshotInfo *sn_info); | |
177 | int bdrv_snapshot_goto(BlockDriverState *bs, | |
178 | const char *snapshot_id); | |
179 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id); | |
180 | int bdrv_snapshot_list(BlockDriverState *bs, | |
181 | QEMUSnapshotInfo **psn_info); | |
182 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn); | |
183 | ||
184 | char *get_human_readable_size(char *buf, int buf_size, int64_t size); | |
185 | int path_is_absolute(const char *path); | |
186 | void path_combine(char *dest, int dest_size, | |
187 | const char *base_path, | |
188 | const char *filename); | |
189 | ||
190 | int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, | |
191 | int64_t pos, int size); | |
192 | ||
193 | int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, | |
194 | int64_t pos, int size); | |
195 | ||
196 | #define BDRV_SECTORS_PER_DIRTY_CHUNK 2048 | |
197 | ||
198 | void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable); | |
199 | int bdrv_get_dirty(BlockDriverState *bs, int64_t sector); | |
200 | void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, | |
201 | int nr_sectors); | |
202 | int64_t bdrv_get_dirty_count(BlockDriverState *bs); | |
203 | ||
204 | ||
205 | typedef enum { | |
206 | BLKDBG_L1_UPDATE, | |
207 | ||
208 | BLKDBG_L1_GROW_ALLOC_TABLE, | |
209 | BLKDBG_L1_GROW_WRITE_TABLE, | |
210 | BLKDBG_L1_GROW_ACTIVATE_TABLE, | |
211 | ||
212 | BLKDBG_L2_LOAD, | |
213 | BLKDBG_L2_UPDATE, | |
214 | BLKDBG_L2_UPDATE_COMPRESSED, | |
215 | BLKDBG_L2_ALLOC_COW_READ, | |
216 | BLKDBG_L2_ALLOC_WRITE, | |
217 | ||
218 | BLKDBG_READ, | |
219 | BLKDBG_READ_AIO, | |
220 | BLKDBG_READ_BACKING, | |
221 | BLKDBG_READ_BACKING_AIO, | |
222 | BLKDBG_READ_COMPRESSED, | |
223 | ||
224 | BLKDBG_WRITE_AIO, | |
225 | BLKDBG_WRITE_COMPRESSED, | |
226 | ||
227 | BLKDBG_VMSTATE_LOAD, | |
228 | BLKDBG_VMSTATE_SAVE, | |
229 | ||
230 | BLKDBG_COW_READ, | |
231 | BLKDBG_COW_WRITE, | |
232 | ||
233 | BLKDBG_REFTABLE_LOAD, | |
234 | BLKDBG_REFTABLE_GROW, | |
235 | ||
236 | BLKDBG_REFBLOCK_LOAD, | |
237 | BLKDBG_REFBLOCK_UPDATE, | |
238 | BLKDBG_REFBLOCK_UPDATE_PART, | |
239 | BLKDBG_REFBLOCK_ALLOC, | |
240 | BLKDBG_REFBLOCK_ALLOC_HOOKUP, | |
241 | BLKDBG_REFBLOCK_ALLOC_WRITE, | |
242 | BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, | |
243 | BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, | |
244 | BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, | |
245 | ||
246 | BLKDBG_CLUSTER_ALLOC, | |
247 | BLKDBG_CLUSTER_ALLOC_BYTES, | |
248 | BLKDBG_CLUSTER_FREE, | |
249 | ||
250 | BLKDBG_EVENT_MAX, | |
251 | } BlkDebugEvent; | |
252 | ||
253 | #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) | |
254 | void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); | |
255 | ||
256 | #endif |