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