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Commit | Line | Data |
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faf07963 PB |
1 | #ifndef BLOCK_H |
2 | #define BLOCK_H | |
3 | ||
737e150e | 4 | #include "block/aio.h" |
daf015ef | 5 | #include "qemu/iov.h" |
1de7afc9 | 6 | #include "qemu/option.h" |
10817bf0 | 7 | #include "qemu/coroutine.h" |
5366d0c8 | 8 | #include "block/accounting.h" |
ebab2259 | 9 | #include "block/dirty-bitmap.h" |
7b1b5d19 | 10 | #include "qapi/qmp/qobject.h" |
2f0c9fe6 | 11 | #include "qapi-types.h" |
78f9dc85 | 12 | #include "qemu/hbitmap.h" |
a76bab49 | 13 | |
faf07963 | 14 | /* block.c */ |
faf07963 | 15 | typedef struct BlockDriver BlockDriver; |
2f0c9fe6 | 16 | typedef struct BlockJob BlockJob; |
b4b059f6 | 17 | typedef struct BdrvChild BdrvChild; |
f3930ed0 | 18 | typedef struct BdrvChildRole BdrvChildRole; |
c55a832f | 19 | typedef struct BlockJobTxn BlockJobTxn; |
faf07963 | 20 | |
faf07963 PB |
21 | typedef struct BlockDriverInfo { |
22 | /* in bytes, 0 if irrelevant */ | |
23 | int cluster_size; | |
24 | /* offset at which the VM state can be saved (0 if not possible) */ | |
25 | int64_t vm_state_offset; | |
64c79160 | 26 | bool is_dirty; |
e1a5c4be PL |
27 | /* |
28 | * True if unallocated blocks read back as zeroes. This is equivalent | |
b6af0975 | 29 | * to the LBPRZ flag in the SCSI logical block provisioning page. |
e1a5c4be PL |
30 | */ |
31 | bool unallocated_blocks_are_zero; | |
32 | /* | |
33 | * True if the driver can optimize writing zeroes by unmapping | |
34 | * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux | |
35 | * with the difference that in qemu a discard is allowed to silently | |
74021bc4 | 36 | * fail. Therefore we have to use bdrv_pwrite_zeroes with the |
e1a5c4be PL |
37 | * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping. |
38 | * After this call the driver has to guarantee that the contents read | |
39 | * back as zero. It is additionally required that the block device is | |
40 | * opened with BDRV_O_UNMAP flag for this to work. | |
41 | */ | |
42 | bool can_write_zeroes_with_unmap; | |
85f49cad FZ |
43 | /* |
44 | * True if this block driver only supports compressed writes | |
45 | */ | |
46 | bool needs_compressed_writes; | |
faf07963 PB |
47 | } BlockDriverInfo; |
48 | ||
f8111c24 DXW |
49 | typedef struct BlockFragInfo { |
50 | uint64_t allocated_clusters; | |
51 | uint64_t total_clusters; | |
52 | uint64_t fragmented_clusters; | |
e6439d78 | 53 | uint64_t compressed_clusters; |
f8111c24 DXW |
54 | } BlockFragInfo; |
55 | ||
6faac15f | 56 | typedef enum { |
9568b511 WC |
57 | BDRV_REQ_COPY_ON_READ = 0x1, |
58 | BDRV_REQ_ZERO_WRITE = 0x2, | |
d32f35cb PL |
59 | /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver |
60 | * is allowed to optimize a write zeroes request by unmapping (discarding) | |
61 | * blocks if it is guaranteed that the result will read back as | |
62 | * zeroes. The flag is only passed to the driver if the block device is | |
63 | * opened with BDRV_O_UNMAP. | |
64 | */ | |
9568b511 | 65 | BDRV_REQ_MAY_UNMAP = 0x4, |
61408b25 | 66 | BDRV_REQ_NO_SERIALISING = 0x8, |
bfd18d1e | 67 | BDRV_REQ_FUA = 0x10, |
fa166538 EB |
68 | |
69 | /* Mask of valid flags */ | |
70 | BDRV_REQ_MASK = 0x1f, | |
6faac15f PL |
71 | } BdrvRequestFlags; |
72 | ||
892b7de8 ET |
73 | typedef struct BlockSizes { |
74 | uint32_t phys; | |
75 | uint32_t log; | |
76 | } BlockSizes; | |
77 | ||
78 | typedef struct HDGeometry { | |
79 | uint32_t heads; | |
80 | uint32_t sectors; | |
81 | uint32_t cylinders; | |
82 | } HDGeometry; | |
83 | ||
faf07963 | 84 | #define BDRV_O_RDWR 0x0002 |
faf07963 | 85 | #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ |
8bfea15d | 86 | #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */ |
9f7965c7 | 87 | #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ |
5c6c3a6c | 88 | #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ |
b783e409 | 89 | #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ |
016f5cf6 | 90 | #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ |
53fec9d3 | 91 | #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ |
04c01a5c | 92 | #define BDRV_O_INACTIVE 0x0800 /* consistency hint for migration handoff */ |
058f8f16 | 93 | #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */ |
be028adc | 94 | #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */ |
9e8f1835 | 95 | #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */ |
2e40134b HR |
96 | #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given: |
97 | select an appropriate protocol driver, | |
98 | ignoring the format layer */ | |
abb06c5a | 99 | #define BDRV_O_NO_IO 0x10000 /* don't initialize for I/O */ |
9f7965c7 | 100 | |
61de4c68 | 101 | #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_NO_FLUSH) |
faf07963 | 102 | |
54861b92 KW |
103 | |
104 | /* Option names of options parsed by the block layer */ | |
105 | ||
106 | #define BDRV_OPT_CACHE_WB "cache.writeback" | |
107 | #define BDRV_OPT_CACHE_DIRECT "cache.direct" | |
108 | #define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush" | |
109 | ||
110 | ||
6ea44308 | 111 | #define BDRV_SECTOR_BITS 9 |
c63782cb | 112 | #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) |
3abbc4d9 | 113 | #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) |
6ea44308 | 114 | |
75af1f34 PL |
115 | #define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \ |
116 | INT_MAX >> BDRV_SECTOR_BITS) | |
117 | ||
705be728 FZ |
118 | /* |
119 | * Allocation status flags | |
67a0fd2a | 120 | * BDRV_BLOCK_DATA: data is read from a file returned by bdrv_get_block_status. |
4333bb71 | 121 | * BDRV_BLOCK_ZERO: sectors read as zero |
67a0fd2a FZ |
122 | * BDRV_BLOCK_OFFSET_VALID: sector stored as raw data in a file returned by |
123 | * bdrv_get_block_status. | |
e88ae226 KW |
124 | * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this |
125 | * layer (as opposed to the backing file) | |
92bc50a5 PL |
126 | * BDRV_BLOCK_RAW: used internally to indicate that the request |
127 | * was answered by the raw driver and that one | |
128 | * should look in bs->file directly. | |
4333bb71 PB |
129 | * |
130 | * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in | |
131 | * bs->file where sector data can be read from as raw data. | |
132 | * | |
133 | * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present. | |
134 | * | |
135 | * DATA ZERO OFFSET_VALID | |
136 | * t t t sectors read as zero, bs->file is zero at offset | |
137 | * t f t sectors read as valid from bs->file at offset | |
138 | * f t t sectors preallocated, read as zero, bs->file not | |
139 | * necessarily zero at offset | |
140 | * f f t sectors preallocated but read from backing_hd, | |
141 | * bs->file contains garbage at offset | |
142 | * t t f sectors preallocated, read as zero, unknown offset | |
143 | * t f f sectors read from unknown file or offset | |
144 | * f t f not allocated or unknown offset, read as zero | |
145 | * f f f not allocated or unknown offset, read from backing_hd | |
146 | */ | |
e88ae226 KW |
147 | #define BDRV_BLOCK_DATA 0x01 |
148 | #define BDRV_BLOCK_ZERO 0x02 | |
149 | #define BDRV_BLOCK_OFFSET_VALID 0x04 | |
150 | #define BDRV_BLOCK_RAW 0x08 | |
151 | #define BDRV_BLOCK_ALLOCATED 0x10 | |
4333bb71 PB |
152 | #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK |
153 | ||
e971aa12 JC |
154 | typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue; |
155 | ||
156 | typedef struct BDRVReopenState { | |
157 | BlockDriverState *bs; | |
158 | int flags; | |
4d2cb092 | 159 | QDict *options; |
145f598e | 160 | QDict *explicit_options; |
e971aa12 JC |
161 | void *opaque; |
162 | } BDRVReopenState; | |
163 | ||
8574575f FZ |
164 | /* |
165 | * Block operation types | |
166 | */ | |
167 | typedef enum BlockOpType { | |
168 | BLOCK_OP_TYPE_BACKUP_SOURCE, | |
169 | BLOCK_OP_TYPE_BACKUP_TARGET, | |
170 | BLOCK_OP_TYPE_CHANGE, | |
bb00021d FZ |
171 | BLOCK_OP_TYPE_COMMIT_SOURCE, |
172 | BLOCK_OP_TYPE_COMMIT_TARGET, | |
8574575f FZ |
173 | BLOCK_OP_TYPE_DATAPLANE, |
174 | BLOCK_OP_TYPE_DRIVE_DEL, | |
175 | BLOCK_OP_TYPE_EJECT, | |
176 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, | |
177 | BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, | |
178 | BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, | |
05e4d14b | 179 | BLOCK_OP_TYPE_MIRROR_SOURCE, |
e40e5027 | 180 | BLOCK_OP_TYPE_MIRROR_TARGET, |
8574575f FZ |
181 | BLOCK_OP_TYPE_RESIZE, |
182 | BLOCK_OP_TYPE_STREAM, | |
09158f00 | 183 | BLOCK_OP_TYPE_REPLACE, |
8574575f FZ |
184 | BLOCK_OP_TYPE_MAX, |
185 | } BlockOpType; | |
e971aa12 | 186 | |
d15e5465 LC |
187 | void bdrv_info_print(Monitor *mon, const QObject *data); |
188 | void bdrv_info(Monitor *mon, QObject **ret_data); | |
218a536a LC |
189 | void bdrv_stats_print(Monitor *mon, const QObject *data); |
190 | void bdrv_info_stats(Monitor *mon, QObject **ret_data); | |
faf07963 | 191 | |
0563e191 | 192 | /* disk I/O throttling */ |
faf07963 | 193 | void bdrv_init(void); |
eb852011 | 194 | void bdrv_init_with_whitelist(void); |
e6ff69bf | 195 | bool bdrv_uses_whitelist(void); |
98289620 | 196 | BlockDriver *bdrv_find_protocol(const char *filename, |
b65a5e12 HR |
197 | bool allow_protocol_prefix, |
198 | Error **errp); | |
faf07963 | 199 | BlockDriver *bdrv_find_format(const char *format_name); |
0e7e1989 | 200 | int bdrv_create(BlockDriver *drv, const char* filename, |
c282e1fd CL |
201 | QemuOpts *opts, Error **errp); |
202 | int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); | |
e4e9986b | 203 | BlockDriverState *bdrv_new(void); |
8802d1fd | 204 | void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); |
3f09bfbc KW |
205 | void bdrv_replace_in_backing_chain(BlockDriverState *old, |
206 | BlockDriverState *new); | |
207 | ||
baf5602e | 208 | int bdrv_parse_cache_mode(const char *mode, int *flags, bool *writethrough); |
9e8f1835 | 209 | int bdrv_parse_discard_flags(const char *mode, int *flags); |
b4b059f6 KW |
210 | BdrvChild *bdrv_open_child(const char *filename, |
211 | QDict *options, const char *bdref_key, | |
212 | BlockDriverState* parent, | |
213 | const BdrvChildRole *child_role, | |
214 | bool allow_none, Error **errp); | |
8d24cce1 | 215 | void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd); |
d9b7b057 KW |
216 | int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options, |
217 | const char *bdref_key, Error **errp); | |
5b363937 HR |
218 | BlockDriverState *bdrv_open(const char *filename, const char *reference, |
219 | QDict *options, int flags, Error **errp); | |
e971aa12 | 220 | BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, |
4d2cb092 KW |
221 | BlockDriverState *bs, |
222 | QDict *options, int flags); | |
e971aa12 JC |
223 | int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp); |
224 | int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp); | |
225 | int bdrv_reopen_prepare(BDRVReopenState *reopen_state, | |
226 | BlockReopenQueue *queue, Error **errp); | |
227 | void bdrv_reopen_commit(BDRVReopenState *reopen_state); | |
228 | void bdrv_reopen_abort(BDRVReopenState *reopen_state); | |
fbcbbf4e | 229 | int bdrv_read(BdrvChild *child, int64_t sector_num, |
faf07963 | 230 | uint8_t *buf, int nb_sectors); |
18d51c4b | 231 | int bdrv_write(BdrvChild *child, int64_t sector_num, |
faf07963 | 232 | const uint8_t *buf, int nb_sectors); |
720ff280 | 233 | int bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset, |
74021bc4 | 234 | int count, BdrvRequestFlags flags); |
720ff280 | 235 | int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags); |
cf2ab8fc KW |
236 | int bdrv_pread(BdrvChild *child, int64_t offset, void *buf, int bytes); |
237 | int bdrv_preadv(BdrvChild *child, int64_t offset, QEMUIOVector *qiov); | |
d9ca2ea2 KW |
238 | int bdrv_pwrite(BdrvChild *child, int64_t offset, const void *buf, int bytes); |
239 | int bdrv_pwritev(BdrvChild *child, int64_t offset, QEMUIOVector *qiov); | |
240 | int bdrv_pwrite_sync(BdrvChild *child, int64_t offset, | |
241 | const void *buf, int count); | |
28b04a8f KW |
242 | int coroutine_fn bdrv_co_readv(BdrvChild *child, int64_t sector_num, |
243 | int nb_sectors, QEMUIOVector *qiov); | |
25ec177d KW |
244 | int coroutine_fn bdrv_co_writev(BdrvChild *child, int64_t sector_num, |
245 | int nb_sectors, QEMUIOVector *qiov); | |
f08f2dda SH |
246 | /* |
247 | * Efficiently zero a region of the disk image. Note that this is a regular | |
248 | * I/O request like read or write and should have a reasonable size. This | |
249 | * function is not suitable for zeroing the entire image in a single request | |
250 | * because it may allocate memory for the entire region. | |
251 | */ | |
a03ef88f KW |
252 | int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset, |
253 | int count, BdrvRequestFlags flags); | |
e8a6bb9c MT |
254 | BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, |
255 | const char *backing_file); | |
f198fd1c | 256 | int bdrv_get_backing_file_depth(BlockDriverState *bs); |
91af7014 | 257 | void bdrv_refresh_filename(BlockDriverState *bs); |
faf07963 | 258 | int bdrv_truncate(BlockDriverState *bs, int64_t offset); |
65a9bb25 | 259 | int64_t bdrv_nb_sectors(BlockDriverState *bs); |
faf07963 | 260 | int64_t bdrv_getlength(BlockDriverState *bs); |
4a1d5e1f | 261 | int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); |
96b8f136 | 262 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); |
3baca891 | 263 | void bdrv_refresh_limits(BlockDriverState *bs, Error **errp); |
faf07963 | 264 | int bdrv_commit(BlockDriverState *bs); |
756e6736 KW |
265 | int bdrv_change_backing_file(BlockDriverState *bs, |
266 | const char *backing_file, const char *backing_fmt); | |
5efa9d5a | 267 | void bdrv_register(BlockDriver *bdrv); |
6ebdcee2 | 268 | int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, |
54e26900 JC |
269 | BlockDriverState *base, |
270 | const char *backing_file_str); | |
6ebdcee2 JC |
271 | BlockDriverState *bdrv_find_overlay(BlockDriverState *active, |
272 | BlockDriverState *bs); | |
79fac568 | 273 | BlockDriverState *bdrv_find_base(BlockDriverState *bs); |
5efa9d5a | 274 | |
e076f338 KW |
275 | |
276 | typedef struct BdrvCheckResult { | |
277 | int corruptions; | |
278 | int leaks; | |
279 | int check_errors; | |
ccf34716 KW |
280 | int corruptions_fixed; |
281 | int leaks_fixed; | |
c6bb9ad1 | 282 | int64_t image_end_offset; |
f8111c24 | 283 | BlockFragInfo bfi; |
e076f338 KW |
284 | } BdrvCheckResult; |
285 | ||
4534ff54 KW |
286 | typedef enum { |
287 | BDRV_FIX_LEAKS = 1, | |
288 | BDRV_FIX_ERRORS = 2, | |
289 | } BdrvCheckMode; | |
290 | ||
291 | int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); | |
e076f338 | 292 | |
77485434 HR |
293 | /* The units of offset and total_work_size may be chosen arbitrarily by the |
294 | * block driver; total_work_size may change during the course of the amendment | |
295 | * operation */ | |
296 | typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset, | |
8b13976d | 297 | int64_t total_work_size, void *opaque); |
77485434 | 298 | int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts, |
8b13976d | 299 | BlockDriverAmendStatusCB *status_cb, void *cb_opaque); |
6f176b48 | 300 | |
f6186f49 | 301 | /* external snapshots */ |
212a5a8f BC |
302 | bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, |
303 | BlockDriverState *candidate); | |
304 | bool bdrv_is_first_non_filter(BlockDriverState *candidate); | |
f6186f49 | 305 | |
09158f00 | 306 | /* check if a named node can be replaced when doing drive-mirror */ |
e12f3784 WC |
307 | BlockDriverState *check_to_replace_node(BlockDriverState *parent_bs, |
308 | const char *node_name, Error **errp); | |
09158f00 | 309 | |
faf07963 | 310 | /* async block I/O */ |
ebb7af21 | 311 | BlockAIOCB *bdrv_aio_readv(BdrvChild *child, int64_t sector_num, |
7c84b1b8 | 312 | QEMUIOVector *iov, int nb_sectors, |
097310b5 | 313 | BlockCompletionFunc *cb, void *opaque); |
0d1049c7 | 314 | BlockAIOCB *bdrv_aio_writev(BdrvChild *child, int64_t sector_num, |
7c84b1b8 | 315 | QEMUIOVector *iov, int nb_sectors, |
097310b5 | 316 | BlockCompletionFunc *cb, void *opaque); |
7c84b1b8 | 317 | BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs, |
097310b5 | 318 | BlockCompletionFunc *cb, void *opaque); |
60ebac16 EB |
319 | BlockAIOCB *bdrv_aio_pdiscard(BlockDriverState *bs, |
320 | int64_t offset, int count, | |
321 | BlockCompletionFunc *cb, void *opaque); | |
7c84b1b8 MA |
322 | void bdrv_aio_cancel(BlockAIOCB *acb); |
323 | void bdrv_aio_cancel_async(BlockAIOCB *acb); | |
faf07963 | 324 | |
7d780669 | 325 | /* sg packet commands */ |
221f715d | 326 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); |
7c84b1b8 | 327 | BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
221f715d | 328 | unsigned long int req, void *buf, |
097310b5 | 329 | BlockCompletionFunc *cb, void *opaque); |
7d780669 | 330 | |
0f15423c | 331 | /* Invalidate any cached metadata used by image formats */ |
5a8a30db KW |
332 | void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp); |
333 | void bdrv_invalidate_cache_all(Error **errp); | |
76b1c7fe | 334 | int bdrv_inactivate_all(void); |
0f15423c | 335 | |
faf07963 | 336 | /* Ensure contents are flushed to disk. */ |
205ef796 | 337 | int bdrv_flush(BlockDriverState *bs); |
07f07615 | 338 | int coroutine_fn bdrv_co_flush(BlockDriverState *bs); |
2bc93fed | 339 | void bdrv_close_all(void); |
5b98db0a | 340 | void bdrv_drain(BlockDriverState *bs); |
a77fd4bb | 341 | void coroutine_fn bdrv_co_drain(BlockDriverState *bs); |
922453bc | 342 | void bdrv_drain_all(void); |
c6ca28d6 | 343 | |
0c51a893 | 344 | int bdrv_pdiscard(BlockDriverState *bs, int64_t offset, int count); |
9f1963b3 | 345 | int bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset, int count); |
3ac21627 | 346 | int bdrv_has_zero_init_1(BlockDriverState *bs); |
f2feebbd | 347 | int bdrv_has_zero_init(BlockDriverState *bs); |
4ce78691 PL |
348 | bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs); |
349 | bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs); | |
b6b8a333 | 350 | int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, |
67a0fd2a FZ |
351 | int nb_sectors, int *pnum, |
352 | BlockDriverState **file); | |
ba3f0e25 FZ |
353 | int64_t bdrv_get_block_status_above(BlockDriverState *bs, |
354 | BlockDriverState *base, | |
355 | int64_t sector_num, | |
67a0fd2a FZ |
356 | int nb_sectors, int *pnum, |
357 | BlockDriverState **file); | |
f58c7b35 | 358 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
39aa9a12 | 359 | int *pnum); |
b35b2bba MR |
360 | int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, |
361 | int64_t sector_num, int nb_sectors, int *pnum); | |
faf07963 | 362 | |
54115412 EB |
363 | bool bdrv_is_read_only(BlockDriverState *bs); |
364 | bool bdrv_is_sg(BlockDriverState *bs); | |
e031f750 | 365 | bool bdrv_is_inserted(BlockDriverState *bs); |
faf07963 | 366 | int bdrv_media_changed(BlockDriverState *bs); |
025e849a | 367 | void bdrv_lock_medium(BlockDriverState *bs, bool locked); |
f36f3949 | 368 | void bdrv_eject(BlockDriverState *bs, bool eject_flag); |
f8d6bba1 | 369 | const char *bdrv_get_format_name(BlockDriverState *bs); |
dc364f4c | 370 | BlockDriverState *bdrv_find_node(const char *node_name); |
d5a8ee60 | 371 | BlockDeviceInfoList *bdrv_named_nodes_list(Error **errp); |
12d3ba82 BC |
372 | BlockDriverState *bdrv_lookup_bs(const char *device, |
373 | const char *node_name, | |
374 | Error **errp); | |
5a6684d2 | 375 | bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base); |
04df765a | 376 | BlockDriverState *bdrv_next_node(BlockDriverState *bs); |
88be7b4b KW |
377 | |
378 | typedef struct BdrvNextIterator { | |
379 | enum { | |
380 | BDRV_NEXT_BACKEND_ROOTS, | |
381 | BDRV_NEXT_MONITOR_OWNED, | |
382 | } phase; | |
383 | BlockBackend *blk; | |
384 | BlockDriverState *bs; | |
385 | } BdrvNextIterator; | |
386 | ||
387 | BlockDriverState *bdrv_first(BdrvNextIterator *it); | |
388 | BlockDriverState *bdrv_next(BdrvNextIterator *it); | |
389 | ||
262b4e8f | 390 | BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs); |
54115412 EB |
391 | bool bdrv_is_encrypted(BlockDriverState *bs); |
392 | bool bdrv_key_required(BlockDriverState *bs); | |
faf07963 | 393 | int bdrv_set_key(BlockDriverState *bs, const char *key); |
4d2855a3 | 394 | void bdrv_add_key(BlockDriverState *bs, const char *key, Error **errp); |
c0f4ce77 | 395 | int bdrv_query_missing_keys(void); |
faf07963 PB |
396 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
397 | void *opaque); | |
20a9e77d | 398 | const char *bdrv_get_node_name(const BlockDriverState *bs); |
bfb197e0 | 399 | const char *bdrv_get_device_name(const BlockDriverState *bs); |
9b2aa84f | 400 | const char *bdrv_get_device_or_node_name(const BlockDriverState *bs); |
c8433287 | 401 | int bdrv_get_flags(BlockDriverState *bs); |
faf07963 PB |
402 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
403 | const uint8_t *buf, int nb_sectors); | |
404 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); | |
eae041fe | 405 | ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); |
244483e6 KW |
406 | void bdrv_round_sectors_to_clusters(BlockDriverState *bs, |
407 | int64_t sector_num, int nb_sectors, | |
408 | int64_t *cluster_sector_num, | |
409 | int *cluster_nb_sectors); | |
343bded4 | 410 | void bdrv_round_to_clusters(BlockDriverState *bs, |
244483e6 KW |
411 | int64_t offset, unsigned int bytes, |
412 | int64_t *cluster_offset, | |
413 | unsigned int *cluster_bytes); | |
faf07963 | 414 | |
045df330 | 415 | const char *bdrv_get_encrypted_filename(BlockDriverState *bs); |
faf07963 PB |
416 | void bdrv_get_backing_filename(BlockDriverState *bs, |
417 | char *filename, int filename_size); | |
dc5a1371 | 418 | void bdrv_get_full_backing_filename(BlockDriverState *bs, |
9f07429e | 419 | char *dest, size_t sz, Error **errp); |
0a82855a HR |
420 | void bdrv_get_full_backing_filename_from_filename(const char *backed, |
421 | const char *backing, | |
9f07429e HR |
422 | char *dest, size_t sz, |
423 | Error **errp); | |
199630b6 | 424 | int bdrv_is_snapshot(BlockDriverState *bs); |
faf07963 | 425 | |
5c98415b | 426 | int path_has_protocol(const char *path); |
faf07963 PB |
427 | int path_is_absolute(const char *path); |
428 | void path_combine(char *dest, int dest_size, | |
429 | const char *base_path, | |
430 | const char *filename); | |
431 | ||
5ddda0b8 | 432 | int bdrv_readv_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); |
cf8074b3 | 433 | int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); |
45566e9c CH |
434 | int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, |
435 | int64_t pos, int size); | |
178e08a5 | 436 | |
45566e9c CH |
437 | int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, |
438 | int64_t pos, int size); | |
178e08a5 | 439 | |
d92ada22 LC |
440 | void bdrv_img_create(const char *filename, const char *fmt, |
441 | const char *base_filename, const char *base_fmt, | |
f382d43a MR |
442 | char *options, uint64_t img_size, int flags, |
443 | Error **errp, bool quiet); | |
f88e1a42 | 444 | |
339064d5 KW |
445 | /* Returns the alignment in bytes that is required so that no bounce buffer |
446 | * is required throughout the stack */ | |
4196d2f0 DL |
447 | size_t bdrv_min_mem_align(BlockDriverState *bs); |
448 | /* Returns optimal alignment in bytes for bounce buffer */ | |
339064d5 | 449 | size_t bdrv_opt_mem_align(BlockDriverState *bs); |
ba5b7ad4 | 450 | void *qemu_blockalign(BlockDriverState *bs, size_t size); |
9ebd8448 | 451 | void *qemu_blockalign0(BlockDriverState *bs, size_t size); |
7d2a35cc | 452 | void *qemu_try_blockalign(BlockDriverState *bs, size_t size); |
9ebd8448 | 453 | void *qemu_try_blockalign0(BlockDriverState *bs, size_t size); |
c53b1c51 | 454 | bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov); |
ba5b7ad4 | 455 | |
53fec9d3 SH |
456 | void bdrv_enable_copy_on_read(BlockDriverState *bs); |
457 | void bdrv_disable_copy_on_read(BlockDriverState *bs); | |
458 | ||
9fcb0251 FZ |
459 | void bdrv_ref(BlockDriverState *bs); |
460 | void bdrv_unref(BlockDriverState *bs); | |
33a60407 | 461 | void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child); |
98292c61 WC |
462 | BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs, |
463 | BlockDriverState *child_bs, | |
464 | const char *child_name, | |
465 | const BdrvChildRole *child_role); | |
8b9b0cc2 | 466 | |
fbe40ff7 FZ |
467 | bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp); |
468 | void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason); | |
469 | void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason); | |
470 | void bdrv_op_block_all(BlockDriverState *bs, Error *reason); | |
471 | void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason); | |
472 | bool bdrv_op_blocker_is_empty(BlockDriverState *bs); | |
473 | ||
9a4f4c31 KW |
474 | #define BLKDBG_EVENT(child, evt) \ |
475 | do { \ | |
476 | if (child) { \ | |
477 | bdrv_debug_event(child->bs, evt); \ | |
478 | } \ | |
479 | } while (0) | |
480 | ||
a31939e6 | 481 | void bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent event); |
8b9b0cc2 | 482 | |
41c695c7 KW |
483 | int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, |
484 | const char *tag); | |
4cc70e93 | 485 | int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag); |
41c695c7 KW |
486 | int bdrv_debug_resume(BlockDriverState *bs, const char *tag); |
487 | bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); | |
488 | ||
db519cba FZ |
489 | /** |
490 | * bdrv_get_aio_context: | |
491 | * | |
492 | * Returns: the currently bound #AioContext | |
493 | */ | |
494 | AioContext *bdrv_get_aio_context(BlockDriverState *bs); | |
495 | ||
dcd04228 SH |
496 | /** |
497 | * bdrv_set_aio_context: | |
498 | * | |
499 | * Changes the #AioContext used for fd handlers, timers, and BHs by this | |
500 | * BlockDriverState and all its children. | |
501 | * | |
2e5b887c | 502 | * This function must be called with iothread lock held. |
dcd04228 SH |
503 | */ |
504 | void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context); | |
892b7de8 ET |
505 | int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz); |
506 | int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo); | |
dcd04228 | 507 | |
448ad91d ML |
508 | void bdrv_io_plug(BlockDriverState *bs); |
509 | void bdrv_io_unplug(BlockDriverState *bs); | |
6b98bd64 PB |
510 | void bdrv_io_unplugged_begin(BlockDriverState *bs); |
511 | void bdrv_io_unplugged_end(BlockDriverState *bs); | |
448ad91d | 512 | |
51288d79 FZ |
513 | /** |
514 | * bdrv_drained_begin: | |
515 | * | |
516 | * Begin a quiesced section for exclusive access to the BDS, by disabling | |
517 | * external request sources including NBD server and device model. Note that | |
518 | * this doesn't block timers or coroutines from submitting more requests, which | |
519 | * means block_job_pause is still necessary. | |
520 | * | |
521 | * This function can be recursive. | |
522 | */ | |
523 | void bdrv_drained_begin(BlockDriverState *bs); | |
524 | ||
525 | /** | |
526 | * bdrv_drained_end: | |
527 | * | |
528 | * End a quiescent section started by bdrv_drained_begin(). | |
529 | */ | |
530 | void bdrv_drained_end(BlockDriverState *bs); | |
531 | ||
e06018ad WC |
532 | void bdrv_add_child(BlockDriverState *parent, BlockDriverState *child, |
533 | Error **errp); | |
534 | void bdrv_del_child(BlockDriverState *parent, BdrvChild *child, Error **errp); | |
535 | ||
8a4bc5aa | 536 | #endif |