1 #ifndef BLOCK_H 2 #define BLOCK_H 3 4 #include "block/aio.h" 5 #include "qemu-common.h" 6 #include "qemu/option.h" 7 #include "block/coroutine.h" 8 #include "block/accounting.h" 9 #include "qapi/qmp/qobject.h" 10 #include "qapi-types.h" 11 12 /* block.c */ 13 typedef struct BlockDriver BlockDriver; 14 typedef struct BlockJob BlockJob; 15 typedef struct BdrvChildRole BdrvChildRole; 16 17 typedef struct BlockDriverInfo { 18 /* in bytes, 0 if irrelevant */ 19 int cluster_size; 20 /* offset at which the VM state can be saved (0 if not possible) */ 21 int64_t vm_state_offset; 22 bool is_dirty; 23 /* 24 * True if unallocated blocks read back as zeroes. This is equivalent 25 * to the the LBPRZ flag in the SCSI logical block provisioning page. 26 */ 27 bool unallocated_blocks_are_zero; 28 /* 29 * True if the driver can optimize writing zeroes by unmapping 30 * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux 31 * with the difference that in qemu a discard is allowed to silently 32 * fail. Therefore we have to use bdrv_write_zeroes with the 33 * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping. 34 * After this call the driver has to guarantee that the contents read 35 * back as zero. It is additionally required that the block device is 36 * opened with BDRV_O_UNMAP flag for this to work. 37 */ 38 bool can_write_zeroes_with_unmap; 39 /* 40 * True if this block driver only supports compressed writes 41 */ 42 bool needs_compressed_writes; 43 } BlockDriverInfo; 44 45 typedef struct BlockFragInfo { 46 uint64_t allocated_clusters; 47 uint64_t total_clusters; 48 uint64_t fragmented_clusters; 49 uint64_t compressed_clusters; 50 } BlockFragInfo; 51 52 typedef enum { 53 BDRV_REQ_COPY_ON_READ = 0x1, 54 BDRV_REQ_ZERO_WRITE = 0x2, 55 /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver 56 * is allowed to optimize a write zeroes request by unmapping (discarding) 57 * blocks if it is guaranteed that the result will read back as 58 * zeroes. The flag is only passed to the driver if the block device is 59 * opened with BDRV_O_UNMAP. 60 */ 61 BDRV_REQ_MAY_UNMAP = 0x4, 62 } BdrvRequestFlags; 63 64 typedef struct BlockSizes { 65 uint32_t phys; 66 uint32_t log; 67 } BlockSizes; 68 69 typedef struct HDGeometry { 70 uint32_t heads; 71 uint32_t sectors; 72 uint32_t cylinders; 73 } HDGeometry; 74 75 #define BDRV_O_RDWR 0x0002 76 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ 77 #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */ 78 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ 79 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ 80 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ 81 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ 82 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ 83 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ 84 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */ 85 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */ 86 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */ 87 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */ 88 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given: 89 select an appropriate protocol driver, 90 ignoring the format layer */ 91 92 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH) 93 94 95 /* Option names of options parsed by the block layer */ 96 97 #define BDRV_OPT_CACHE_WB "cache.writeback" 98 #define BDRV_OPT_CACHE_DIRECT "cache.direct" 99 #define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush" 100 101 102 #define BDRV_SECTOR_BITS 9 103 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) 104 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) 105 106 #define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \ 107 INT_MAX >> BDRV_SECTOR_BITS) 108 109 /* 110 * Allocation status flags 111 * BDRV_BLOCK_DATA: data is read from bs->file or another file 112 * BDRV_BLOCK_ZERO: sectors read as zero 113 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data 114 * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this 115 * layer (as opposed to the backing file) 116 * BDRV_BLOCK_RAW: used internally to indicate that the request 117 * was answered by the raw driver and that one 118 * should look in bs->file directly. 119 * 120 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in 121 * bs->file where sector data can be read from as raw data. 122 * 123 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present. 124 * 125 * DATA ZERO OFFSET_VALID 126 * t t t sectors read as zero, bs->file is zero at offset 127 * t f t sectors read as valid from bs->file at offset 128 * f t t sectors preallocated, read as zero, bs->file not 129 * necessarily zero at offset 130 * f f t sectors preallocated but read from backing_hd, 131 * bs->file contains garbage at offset 132 * t t f sectors preallocated, read as zero, unknown offset 133 * t f f sectors read from unknown file or offset 134 * f t f not allocated or unknown offset, read as zero 135 * f f f not allocated or unknown offset, read from backing_hd 136 */ 137 #define BDRV_BLOCK_DATA 0x01 138 #define BDRV_BLOCK_ZERO 0x02 139 #define BDRV_BLOCK_OFFSET_VALID 0x04 140 #define BDRV_BLOCK_RAW 0x08 141 #define BDRV_BLOCK_ALLOCATED 0x10 142 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK 143 144 typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue; 145 146 typedef struct BDRVReopenState { 147 BlockDriverState *bs; 148 int flags; 149 void *opaque; 150 } BDRVReopenState; 151 152 /* 153 * Block operation types 154 */ 155 typedef enum BlockOpType { 156 BLOCK_OP_TYPE_BACKUP_SOURCE, 157 BLOCK_OP_TYPE_BACKUP_TARGET, 158 BLOCK_OP_TYPE_CHANGE, 159 BLOCK_OP_TYPE_COMMIT_SOURCE, 160 BLOCK_OP_TYPE_COMMIT_TARGET, 161 BLOCK_OP_TYPE_DATAPLANE, 162 BLOCK_OP_TYPE_DRIVE_DEL, 163 BLOCK_OP_TYPE_EJECT, 164 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, 165 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, 166 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, 167 BLOCK_OP_TYPE_MIRROR, 168 BLOCK_OP_TYPE_RESIZE, 169 BLOCK_OP_TYPE_STREAM, 170 BLOCK_OP_TYPE_REPLACE, 171 BLOCK_OP_TYPE_MAX, 172 } BlockOpType; 173 174 void bdrv_iostatus_enable(BlockDriverState *bs); 175 void bdrv_iostatus_reset(BlockDriverState *bs); 176 void bdrv_iostatus_disable(BlockDriverState *bs); 177 bool bdrv_iostatus_is_enabled(const BlockDriverState *bs); 178 void bdrv_iostatus_set_err(BlockDriverState *bs, int error); 179 void bdrv_info_print(Monitor *mon, const QObject *data); 180 void bdrv_info(Monitor *mon, QObject **ret_data); 181 void bdrv_stats_print(Monitor *mon, const QObject *data); 182 void bdrv_info_stats(Monitor *mon, QObject **ret_data); 183 184 /* disk I/O throttling */ 185 void bdrv_io_limits_enable(BlockDriverState *bs, const char *group); 186 void bdrv_io_limits_disable(BlockDriverState *bs); 187 void bdrv_io_limits_update_group(BlockDriverState *bs, const char *group); 188 189 void bdrv_init(void); 190 void bdrv_init_with_whitelist(void); 191 BlockDriver *bdrv_find_protocol(const char *filename, 192 bool allow_protocol_prefix, 193 Error **errp); 194 BlockDriver *bdrv_find_format(const char *format_name); 195 BlockDriver *bdrv_find_whitelisted_format(const char *format_name, 196 bool readonly); 197 int bdrv_create(BlockDriver *drv, const char* filename, 198 QemuOpts *opts, Error **errp); 199 int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); 200 BlockDriverState *bdrv_new_root(void); 201 BlockDriverState *bdrv_new(void); 202 void bdrv_make_anon(BlockDriverState *bs); 203 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old); 204 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); 205 int bdrv_parse_cache_flags(const char *mode, int *flags); 206 int bdrv_parse_discard_flags(const char *mode, int *flags); 207 int bdrv_open_image(BlockDriverState **pbs, const char *filename, 208 QDict *options, const char *bdref_key, 209 BlockDriverState* parent, const BdrvChildRole *child_role, 210 bool allow_none, Error **errp); 211 void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd); 212 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp); 213 int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp); 214 int bdrv_open(BlockDriverState **pbs, const char *filename, 215 const char *reference, QDict *options, int flags, 216 BlockDriver *drv, Error **errp); 217 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, 218 BlockDriverState *bs, int flags); 219 int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp); 220 int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp); 221 int bdrv_reopen_prepare(BDRVReopenState *reopen_state, 222 BlockReopenQueue *queue, Error **errp); 223 void bdrv_reopen_commit(BDRVReopenState *reopen_state); 224 void bdrv_reopen_abort(BDRVReopenState *reopen_state); 225 void bdrv_close(BlockDriverState *bs); 226 void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify); 227 int bdrv_read(BlockDriverState *bs, int64_t sector_num, 228 uint8_t *buf, int nb_sectors); 229 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num, 230 uint8_t *buf, int nb_sectors); 231 int bdrv_write(BlockDriverState *bs, int64_t sector_num, 232 const uint8_t *buf, int nb_sectors); 233 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num, 234 int nb_sectors, BdrvRequestFlags flags); 235 BlockAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num, 236 int nb_sectors, BdrvRequestFlags flags, 237 BlockCompletionFunc *cb, void *opaque); 238 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags); 239 int bdrv_pread(BlockDriverState *bs, int64_t offset, 240 void *buf, int count); 241 int bdrv_pwrite(BlockDriverState *bs, int64_t offset, 242 const void *buf, int count); 243 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov); 244 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, 245 const void *buf, int count); 246 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, 247 int nb_sectors, QEMUIOVector *qiov); 248 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs, 249 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); 250 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, 251 int nb_sectors, QEMUIOVector *qiov); 252 /* 253 * Efficiently zero a region of the disk image. Note that this is a regular 254 * I/O request like read or write and should have a reasonable size. This 255 * function is not suitable for zeroing the entire image in a single request 256 * because it may allocate memory for the entire region. 257 */ 258 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, 259 int nb_sectors, BdrvRequestFlags flags); 260 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 261 const char *backing_file); 262 int bdrv_get_backing_file_depth(BlockDriverState *bs); 263 void bdrv_refresh_filename(BlockDriverState *bs); 264 int bdrv_truncate(BlockDriverState *bs, int64_t offset); 265 int64_t bdrv_nb_sectors(BlockDriverState *bs); 266 int64_t bdrv_getlength(BlockDriverState *bs); 267 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); 268 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); 269 void bdrv_refresh_limits(BlockDriverState *bs, Error **errp); 270 int bdrv_commit(BlockDriverState *bs); 271 int bdrv_commit_all(void); 272 int bdrv_change_backing_file(BlockDriverState *bs, 273 const char *backing_file, const char *backing_fmt); 274 void bdrv_register(BlockDriver *bdrv); 275 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, 276 BlockDriverState *base, 277 const char *backing_file_str); 278 BlockDriverState *bdrv_find_overlay(BlockDriverState *active, 279 BlockDriverState *bs); 280 BlockDriverState *bdrv_find_base(BlockDriverState *bs); 281 282 283 typedef struct BdrvCheckResult { 284 int corruptions; 285 int leaks; 286 int check_errors; 287 int corruptions_fixed; 288 int leaks_fixed; 289 int64_t image_end_offset; 290 BlockFragInfo bfi; 291 } BdrvCheckResult; 292 293 typedef enum { 294 BDRV_FIX_LEAKS = 1, 295 BDRV_FIX_ERRORS = 2, 296 } BdrvCheckMode; 297 298 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); 299 300 /* The units of offset and total_work_size may be chosen arbitrarily by the 301 * block driver; total_work_size may change during the course of the amendment 302 * operation */ 303 typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset, 304 int64_t total_work_size); 305 int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts, 306 BlockDriverAmendStatusCB *status_cb); 307 308 /* external snapshots */ 309 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, 310 BlockDriverState *candidate); 311 bool bdrv_is_first_non_filter(BlockDriverState *candidate); 312 313 /* check if a named node can be replaced when doing drive-mirror */ 314 BlockDriverState *check_to_replace_node(const char *node_name, Error **errp); 315 316 /* async block I/O */ 317 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, 318 int sector_num); 319 BlockAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, 320 QEMUIOVector *iov, int nb_sectors, 321 BlockCompletionFunc *cb, void *opaque); 322 BlockAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, 323 QEMUIOVector *iov, int nb_sectors, 324 BlockCompletionFunc *cb, void *opaque); 325 BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs, 326 BlockCompletionFunc *cb, void *opaque); 327 BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs, 328 int64_t sector_num, int nb_sectors, 329 BlockCompletionFunc *cb, void *opaque); 330 void bdrv_aio_cancel(BlockAIOCB *acb); 331 void bdrv_aio_cancel_async(BlockAIOCB *acb); 332 333 typedef struct BlockRequest { 334 /* Fields to be filled by multiwrite caller */ 335 int64_t sector; 336 int nb_sectors; 337 int flags; 338 QEMUIOVector *qiov; 339 BlockCompletionFunc *cb; 340 void *opaque; 341 342 /* Filled by multiwrite implementation */ 343 int error; 344 } BlockRequest; 345 346 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, 347 int num_reqs); 348 349 /* sg packet commands */ 350 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); 351 BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, 352 unsigned long int req, void *buf, 353 BlockCompletionFunc *cb, void *opaque); 354 355 /* Invalidate any cached metadata used by image formats */ 356 void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp); 357 void bdrv_invalidate_cache_all(Error **errp); 358 359 /* Ensure contents are flushed to disk. */ 360 int bdrv_flush(BlockDriverState *bs); 361 int coroutine_fn bdrv_co_flush(BlockDriverState *bs); 362 int bdrv_flush_all(void); 363 void bdrv_close_all(void); 364 void bdrv_drain(BlockDriverState *bs); 365 void bdrv_drain_all(void); 366 367 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 368 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 369 int bdrv_has_zero_init_1(BlockDriverState *bs); 370 int bdrv_has_zero_init(BlockDriverState *bs); 371 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs); 372 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs); 373 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, 374 int nb_sectors, int *pnum); 375 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, 376 int *pnum); 377 int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, 378 int64_t sector_num, int nb_sectors, int *pnum); 379 380 void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error, 381 BlockdevOnError on_write_error); 382 BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read); 383 BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error); 384 void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action, 385 bool is_read, int error); 386 int bdrv_is_read_only(BlockDriverState *bs); 387 int bdrv_is_sg(BlockDriverState *bs); 388 int bdrv_enable_write_cache(BlockDriverState *bs); 389 void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce); 390 int bdrv_is_inserted(BlockDriverState *bs); 391 int bdrv_media_changed(BlockDriverState *bs); 392 void bdrv_lock_medium(BlockDriverState *bs, bool locked); 393 void bdrv_eject(BlockDriverState *bs, bool eject_flag); 394 const char *bdrv_get_format_name(BlockDriverState *bs); 395 BlockDriverState *bdrv_find_node(const char *node_name); 396 BlockDeviceInfoList *bdrv_named_nodes_list(Error **errp); 397 BlockDriverState *bdrv_lookup_bs(const char *device, 398 const char *node_name, 399 Error **errp); 400 bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base); 401 BlockDriverState *bdrv_next_node(BlockDriverState *bs); 402 BlockDriverState *bdrv_next(BlockDriverState *bs); 403 int bdrv_is_encrypted(BlockDriverState *bs); 404 int bdrv_key_required(BlockDriverState *bs); 405 int bdrv_set_key(BlockDriverState *bs, const char *key); 406 void bdrv_add_key(BlockDriverState *bs, const char *key, Error **errp); 407 int bdrv_query_missing_keys(void); 408 void bdrv_iterate_format(void (*it)(void *opaque, const char *name), 409 void *opaque); 410 const char *bdrv_get_node_name(const BlockDriverState *bs); 411 const char *bdrv_get_device_name(const BlockDriverState *bs); 412 const char *bdrv_get_device_or_node_name(const BlockDriverState *bs); 413 int bdrv_get_flags(BlockDriverState *bs); 414 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, 415 const uint8_t *buf, int nb_sectors); 416 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); 417 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); 418 void bdrv_round_to_clusters(BlockDriverState *bs, 419 int64_t sector_num, int nb_sectors, 420 int64_t *cluster_sector_num, 421 int *cluster_nb_sectors); 422 423 const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 424 void bdrv_get_backing_filename(BlockDriverState *bs, 425 char *filename, int filename_size); 426 void bdrv_get_full_backing_filename(BlockDriverState *bs, 427 char *dest, size_t sz, Error **errp); 428 void bdrv_get_full_backing_filename_from_filename(const char *backed, 429 const char *backing, 430 char *dest, size_t sz, 431 Error **errp); 432 int bdrv_is_snapshot(BlockDriverState *bs); 433 434 int path_has_protocol(const char *path); 435 int path_is_absolute(const char *path); 436 void path_combine(char *dest, int dest_size, 437 const char *base_path, 438 const char *filename); 439 440 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); 441 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, 442 int64_t pos, int size); 443 444 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, 445 int64_t pos, int size); 446 447 void bdrv_img_create(const char *filename, const char *fmt, 448 const char *base_filename, const char *base_fmt, 449 char *options, uint64_t img_size, int flags, 450 Error **errp, bool quiet); 451 452 /* Returns the alignment in bytes that is required so that no bounce buffer 453 * is required throughout the stack */ 454 size_t bdrv_min_mem_align(BlockDriverState *bs); 455 /* Returns optimal alignment in bytes for bounce buffer */ 456 size_t bdrv_opt_mem_align(BlockDriverState *bs); 457 void bdrv_set_guest_block_size(BlockDriverState *bs, int align); 458 void *qemu_blockalign(BlockDriverState *bs, size_t size); 459 void *qemu_blockalign0(BlockDriverState *bs, size_t size); 460 void *qemu_try_blockalign(BlockDriverState *bs, size_t size); 461 void *qemu_try_blockalign0(BlockDriverState *bs, size_t size); 462 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov); 463 464 struct HBitmapIter; 465 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap; 466 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, 467 uint32_t granularity, 468 const char *name, 469 Error **errp); 470 int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs, 471 BdrvDirtyBitmap *bitmap, 472 Error **errp); 473 BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs, 474 BdrvDirtyBitmap *bitmap, 475 Error **errp); 476 BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, 477 BdrvDirtyBitmap *bitmap, 478 Error **errp); 479 BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, 480 const char *name); 481 void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap); 482 void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 483 void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap); 484 void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap); 485 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs); 486 uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs); 487 uint32_t bdrv_dirty_bitmap_granularity(BdrvDirtyBitmap *bitmap); 488 bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap); 489 bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap); 490 DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap); 491 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector); 492 void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap, 493 int64_t cur_sector, int nr_sectors); 494 void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap, 495 int64_t cur_sector, int nr_sectors); 496 void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap); 497 void bdrv_dirty_iter_init(BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi); 498 void bdrv_set_dirty_iter(struct HBitmapIter *hbi, int64_t offset); 499 int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap); 500 501 void bdrv_enable_copy_on_read(BlockDriverState *bs); 502 void bdrv_disable_copy_on_read(BlockDriverState *bs); 503 504 void bdrv_ref(BlockDriverState *bs); 505 void bdrv_unref(BlockDriverState *bs); 506 507 bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp); 508 void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason); 509 void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason); 510 void bdrv_op_block_all(BlockDriverState *bs, Error *reason); 511 void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason); 512 bool bdrv_op_blocker_is_empty(BlockDriverState *bs); 513 514 typedef enum { 515 BLKDBG_L1_UPDATE, 516 517 BLKDBG_L1_GROW_ALLOC_TABLE, 518 BLKDBG_L1_GROW_WRITE_TABLE, 519 BLKDBG_L1_GROW_ACTIVATE_TABLE, 520 521 BLKDBG_L2_LOAD, 522 BLKDBG_L2_UPDATE, 523 BLKDBG_L2_UPDATE_COMPRESSED, 524 BLKDBG_L2_ALLOC_COW_READ, 525 BLKDBG_L2_ALLOC_WRITE, 526 527 BLKDBG_READ_AIO, 528 BLKDBG_READ_BACKING_AIO, 529 BLKDBG_READ_COMPRESSED, 530 531 BLKDBG_WRITE_AIO, 532 BLKDBG_WRITE_COMPRESSED, 533 534 BLKDBG_VMSTATE_LOAD, 535 BLKDBG_VMSTATE_SAVE, 536 537 BLKDBG_COW_READ, 538 BLKDBG_COW_WRITE, 539 540 BLKDBG_REFTABLE_LOAD, 541 BLKDBG_REFTABLE_GROW, 542 BLKDBG_REFTABLE_UPDATE, 543 544 BLKDBG_REFBLOCK_LOAD, 545 BLKDBG_REFBLOCK_UPDATE, 546 BLKDBG_REFBLOCK_UPDATE_PART, 547 BLKDBG_REFBLOCK_ALLOC, 548 BLKDBG_REFBLOCK_ALLOC_HOOKUP, 549 BLKDBG_REFBLOCK_ALLOC_WRITE, 550 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, 551 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, 552 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, 553 554 BLKDBG_CLUSTER_ALLOC, 555 BLKDBG_CLUSTER_ALLOC_BYTES, 556 BLKDBG_CLUSTER_FREE, 557 558 BLKDBG_FLUSH_TO_OS, 559 BLKDBG_FLUSH_TO_DISK, 560 561 BLKDBG_PWRITEV_RMW_HEAD, 562 BLKDBG_PWRITEV_RMW_AFTER_HEAD, 563 BLKDBG_PWRITEV_RMW_TAIL, 564 BLKDBG_PWRITEV_RMW_AFTER_TAIL, 565 BLKDBG_PWRITEV, 566 BLKDBG_PWRITEV_ZERO, 567 BLKDBG_PWRITEV_DONE, 568 569 BLKDBG_EMPTY_IMAGE_PREPARE, 570 571 BLKDBG_EVENT_MAX, 572 } BlkDebugEvent; 573 574 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) 575 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); 576 577 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, 578 const char *tag); 579 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag); 580 int bdrv_debug_resume(BlockDriverState *bs, const char *tag); 581 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); 582 583 /** 584 * bdrv_get_aio_context: 585 * 586 * Returns: the currently bound #AioContext 587 */ 588 AioContext *bdrv_get_aio_context(BlockDriverState *bs); 589 590 /** 591 * bdrv_set_aio_context: 592 * 593 * Changes the #AioContext used for fd handlers, timers, and BHs by this 594 * BlockDriverState and all its children. 595 * 596 * This function must be called with iothread lock held. 597 */ 598 void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context); 599 int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz); 600 int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo); 601 602 void bdrv_io_plug(BlockDriverState *bs); 603 void bdrv_io_unplug(BlockDriverState *bs); 604 void bdrv_flush_io_queue(BlockDriverState *bs); 605 606 BlockAcctStats *bdrv_get_stats(BlockDriverState *bs); 607 608 #endif 609