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100644 300 lines (255 sloc) 11.51 kb
68396ea @rmustacc Initial commit of d32e8d0b8d9e0ef7cf7ab2e74548982972789dfc from qemu-kvm
rmustacc authored
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 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */
37
38 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
39
40 #define BDRV_SECTOR_BITS 9
41 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
42 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
43
44 typedef enum {
45 BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC,
46 BLOCK_ERR_STOP_ANY
47 } BlockErrorAction;
48
49 typedef enum {
50 BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
51 } BlockMonEventAction;
52
53 void bdrv_mon_event(const BlockDriverState *bdrv,
54 BlockMonEventAction action, int is_read);
55 void bdrv_info_print(Monitor *mon, const QObject *data);
56 void bdrv_info(Monitor *mon, QObject **ret_data);
57 void bdrv_stats_print(Monitor *mon, const QObject *data);
58 void bdrv_info_stats(Monitor *mon, QObject **ret_data);
59
60 void bdrv_init(void);
61 void bdrv_init_with_whitelist(void);
62 BlockDriver *bdrv_find_protocol(const char *filename);
63 BlockDriver *bdrv_find_format(const char *format_name);
64 BlockDriver *bdrv_find_whitelisted_format(const char *format_name);
65 int bdrv_create(BlockDriver *drv, const char* filename,
66 QEMUOptionParameter *options);
67 int bdrv_create_file(const char* filename, QEMUOptionParameter *options);
68 BlockDriverState *bdrv_new(const char *device_name);
69 void bdrv_make_anon(BlockDriverState *bs);
70 void bdrv_delete(BlockDriverState *bs);
71 int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
72 int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
73 BlockDriver *drv);
74 void bdrv_close(BlockDriverState *bs);
75 int bdrv_attach(BlockDriverState *bs, DeviceState *qdev);
76 void bdrv_detach(BlockDriverState *bs, DeviceState *qdev);
77 DeviceState *bdrv_get_attached(BlockDriverState *bs);
78 int bdrv_read(BlockDriverState *bs, int64_t sector_num,
79 uint8_t *buf, int nb_sectors);
80 int bdrv_write(BlockDriverState *bs, int64_t sector_num,
81 const uint8_t *buf, int nb_sectors);
82 int bdrv_pread(BlockDriverState *bs, int64_t offset,
83 void *buf, int count);
84 int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
85 const void *buf, int count);
86 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,
87 const void *buf, int count);
88 int bdrv_write_sync(BlockDriverState *bs, int64_t sector_num,
89 const uint8_t *buf, int nb_sectors);
90 int bdrv_truncate(BlockDriverState *bs, int64_t offset);
91 int64_t bdrv_getlength(BlockDriverState *bs);
92 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
93 void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs);
94 int bdrv_commit(BlockDriverState *bs);
95 void bdrv_commit_all(void);
96 int bdrv_change_backing_file(BlockDriverState *bs,
97 const char *backing_file, const char *backing_fmt);
98 void bdrv_register(BlockDriver *bdrv);
99
100
101 typedef struct BdrvCheckResult {
102 int corruptions;
103 int leaks;
104 int check_errors;
105 } BdrvCheckResult;
106
107 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res);
108
109 /* async block I/O */
110 typedef struct BlockDriverAIOCB BlockDriverAIOCB;
111 typedef void BlockDriverCompletionFunc(void *opaque, int ret);
112 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
113 int sector_num);
114 BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
115 QEMUIOVector *iov, int nb_sectors,
116 BlockDriverCompletionFunc *cb, void *opaque);
117 BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
118 QEMUIOVector *iov, int nb_sectors,
119 BlockDriverCompletionFunc *cb, void *opaque);
120 BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs,
121 BlockDriverCompletionFunc *cb, void *opaque);
122 void bdrv_aio_cancel(BlockDriverAIOCB *acb);
123
124 typedef struct BlockRequest {
125 /* Fields to be filled by multiwrite caller */
126 int64_t sector;
127 int nb_sectors;
128 QEMUIOVector *qiov;
129 BlockDriverCompletionFunc *cb;
130 void *opaque;
131
132 /* Filled by multiwrite implementation */
133 int error;
134 } BlockRequest;
135
136 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,
137 int num_reqs);
138
139 /* sg packet commands */
140 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);
141 BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
142 unsigned long int req, void *buf,
143 BlockDriverCompletionFunc *cb, void *opaque);
144
145 /* Ensure contents are flushed to disk. */
146 int bdrv_flush(BlockDriverState *bs);
147 void bdrv_flush_all(void);
148 void bdrv_close_all(void);
149
150 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
151 int bdrv_has_zero_init(BlockDriverState *bs);
152 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
153 int *pnum);
154
155 #define BDRV_TYPE_HD 0
156 #define BDRV_TYPE_CDROM 1
157 #define BDRV_TYPE_FLOPPY 2
158 #define BIOS_ATA_TRANSLATION_AUTO 0
159 #define BIOS_ATA_TRANSLATION_NONE 1
160 #define BIOS_ATA_TRANSLATION_LBA 2
161 #define BIOS_ATA_TRANSLATION_LARGE 3
162 #define BIOS_ATA_TRANSLATION_RECHS 4
163
164 void bdrv_set_geometry_hint(BlockDriverState *bs,
165 int cyls, int heads, int secs);
166 void bdrv_set_type_hint(BlockDriverState *bs, int type);
167 void bdrv_set_translation_hint(BlockDriverState *bs, int translation);
168 void bdrv_get_geometry_hint(BlockDriverState *bs,
169 int *pcyls, int *pheads, int *psecs);
170 int bdrv_get_type_hint(BlockDriverState *bs);
171 int bdrv_get_translation_hint(BlockDriverState *bs);
172 void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error,
173 BlockErrorAction on_write_error);
174 BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read);
175 void bdrv_set_removable(BlockDriverState *bs, int removable);
176 int bdrv_is_removable(BlockDriverState *bs);
177 int bdrv_is_read_only(BlockDriverState *bs);
178 int bdrv_is_sg(BlockDriverState *bs);
179 int bdrv_enable_write_cache(BlockDriverState *bs);
180 int bdrv_is_inserted(BlockDriverState *bs);
181 int bdrv_media_changed(BlockDriverState *bs);
182 int bdrv_is_locked(BlockDriverState *bs);
183 void bdrv_set_locked(BlockDriverState *bs, int locked);
184 int bdrv_eject(BlockDriverState *bs, int eject_flag);
185 void bdrv_set_change_cb(BlockDriverState *bs,
186 void (*change_cb)(void *opaque, int reason),
187 void *opaque);
188 void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size);
189 BlockDriverState *bdrv_find(const char *name);
190 BlockDriverState *bdrv_next(BlockDriverState *bs);
191 void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs),
192 void *opaque);
193 int bdrv_is_encrypted(BlockDriverState *bs);
194 int bdrv_key_required(BlockDriverState *bs);
195 int bdrv_set_key(BlockDriverState *bs, const char *key);
196 int bdrv_query_missing_keys(void);
197 void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
198 void *opaque);
199 const char *bdrv_get_device_name(BlockDriverState *bs);
200 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
201 const uint8_t *buf, int nb_sectors);
202 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
203
204 const char *bdrv_get_encrypted_filename(BlockDriverState *bs);
205 void bdrv_get_backing_filename(BlockDriverState *bs,
206 char *filename, int filename_size);
207 int bdrv_can_snapshot(BlockDriverState *bs);
208 int bdrv_is_snapshot(BlockDriverState *bs);
209 BlockDriverState *bdrv_snapshots(void);
210 int bdrv_snapshot_create(BlockDriverState *bs,
211 QEMUSnapshotInfo *sn_info);
212 int bdrv_snapshot_goto(BlockDriverState *bs,
213 const char *snapshot_id);
214 int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
215 int bdrv_snapshot_list(BlockDriverState *bs,
216 QEMUSnapshotInfo **psn_info);
217 int bdrv_snapshot_load_tmp(BlockDriverState *bs,
218 const char *snapshot_name);
219 char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn);
220
221 char *get_human_readable_size(char *buf, int buf_size, int64_t size);
222 int path_is_absolute(const char *path);
223 void path_combine(char *dest, int dest_size,
224 const char *base_path,
225 const char *filename);
226
227 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
228 int64_t pos, int size);
229
230 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
231 int64_t pos, int size);
232
233 int bdrv_img_create(const char *filename, const char *fmt,
234 const char *base_filename, const char *base_fmt,
235 char *options, uint64_t img_size, int flags);
236
237 #define BDRV_SECTORS_PER_DIRTY_CHUNK 2048
238
239 void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable);
240 int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);
241 void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
242 int nr_sectors);
243 int64_t bdrv_get_dirty_count(BlockDriverState *bs);
244
245 void bdrv_set_in_use(BlockDriverState *bs, int in_use);
246 int bdrv_in_use(BlockDriverState *bs);
247
248 typedef enum {
249 BLKDBG_L1_UPDATE,
250
251 BLKDBG_L1_GROW_ALLOC_TABLE,
252 BLKDBG_L1_GROW_WRITE_TABLE,
253 BLKDBG_L1_GROW_ACTIVATE_TABLE,
254
255 BLKDBG_L2_LOAD,
256 BLKDBG_L2_UPDATE,
257 BLKDBG_L2_UPDATE_COMPRESSED,
258 BLKDBG_L2_ALLOC_COW_READ,
259 BLKDBG_L2_ALLOC_WRITE,
260
261 BLKDBG_READ,
262 BLKDBG_READ_AIO,
263 BLKDBG_READ_BACKING,
264 BLKDBG_READ_BACKING_AIO,
265 BLKDBG_READ_COMPRESSED,
266
267 BLKDBG_WRITE_AIO,
268 BLKDBG_WRITE_COMPRESSED,
269
270 BLKDBG_VMSTATE_LOAD,
271 BLKDBG_VMSTATE_SAVE,
272
273 BLKDBG_COW_READ,
274 BLKDBG_COW_WRITE,
275
276 BLKDBG_REFTABLE_LOAD,
277 BLKDBG_REFTABLE_GROW,
278
279 BLKDBG_REFBLOCK_LOAD,
280 BLKDBG_REFBLOCK_UPDATE,
281 BLKDBG_REFBLOCK_UPDATE_PART,
282 BLKDBG_REFBLOCK_ALLOC,
283 BLKDBG_REFBLOCK_ALLOC_HOOKUP,
284 BLKDBG_REFBLOCK_ALLOC_WRITE,
285 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS,
286 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE,
287 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE,
288
289 BLKDBG_CLUSTER_ALLOC,
290 BLKDBG_CLUSTER_ALLOC_BYTES,
291 BLKDBG_CLUSTER_FREE,
292
293 BLKDBG_EVENT_MAX,
294 } BlkDebugEvent;
295
296 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
297 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
298
299 #endif
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