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 "qemu/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 BdrvChild BdrvChild; 16 typedef struct BdrvChildRole BdrvChildRole; 17 18 typedef struct BlockDriverInfo { 19 /* in bytes, 0 if irrelevant */ 20 int cluster_size; 21 /* offset at which the VM state can be saved (0 if not possible) */ 22 int64_t vm_state_offset; 23 bool is_dirty; 24 /* 25 * True if unallocated blocks read back as zeroes. This is equivalent 26 * to the LBPRZ flag in the SCSI logical block provisioning page. 27 */ 28 bool unallocated_blocks_are_zero; 29 /* 30 * True if the driver can optimize writing zeroes by unmapping 31 * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux 32 * with the difference that in qemu a discard is allowed to silently 33 * fail. Therefore we have to use bdrv_write_zeroes with the 34 * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping. 35 * After this call the driver has to guarantee that the contents read 36 * back as zero. It is additionally required that the block device is 37 * opened with BDRV_O_UNMAP flag for this to work. 38 */ 39 bool can_write_zeroes_with_unmap; 40 /* 41 * True if this block driver only supports compressed writes 42 */ 43 bool needs_compressed_writes; 44 } BlockDriverInfo; 45 46 typedef struct BlockFragInfo { 47 uint64_t allocated_clusters; 48 uint64_t total_clusters; 49 uint64_t fragmented_clusters; 50 uint64_t compressed_clusters; 51 } BlockFragInfo; 52 53 typedef enum { 54 BDRV_REQ_COPY_ON_READ = 0x1, 55 BDRV_REQ_ZERO_WRITE = 0x2, 56 /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver 57 * is allowed to optimize a write zeroes request by unmapping (discarding) 58 * blocks if it is guaranteed that the result will read back as 59 * zeroes. The flag is only passed to the driver if the block device is 60 * opened with BDRV_O_UNMAP. 61 */ 62 BDRV_REQ_MAY_UNMAP = 0x4, 63 BDRV_REQ_NO_COPY_ON_READ = 0x8, 64 } BdrvRequestFlags; 65 66 typedef struct BlockSizes { 67 uint32_t phys; 68 uint32_t log; 69 } BlockSizes; 70 71 typedef struct HDGeometry { 72 uint32_t heads; 73 uint32_t sectors; 74 uint32_t cylinders; 75 } HDGeometry; 76 77 #define BDRV_O_RDWR 0x0002 78 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ 79 #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */ 80 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ 81 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ 82 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ 83 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ 84 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ 85 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ 86 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */ 87 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */ 88 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */ 89 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */ 90 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given: 91 select an appropriate protocol driver, 92 ignoring the format layer */ 93 94 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH) 95 96 97 /* Option names of options parsed by the block layer */ 98 99 #define BDRV_OPT_CACHE_WB "cache.writeback" 100 #define BDRV_OPT_CACHE_DIRECT "cache.direct" 101 #define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush" 102 103 104 #define BDRV_SECTOR_BITS 9 105 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) 106 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) 107 108 #define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \ 109 INT_MAX >> BDRV_SECTOR_BITS) 110 111 /* 112 * Allocation status flags 113 * BDRV_BLOCK_DATA: data is read from bs->file or another file 114 * BDRV_BLOCK_ZERO: sectors read as zero 115 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data 116 * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this 117 * layer (as opposed to the backing file) 118 * BDRV_BLOCK_RAW: used internally to indicate that the request 119 * was answered by the raw driver and that one 120 * should look in bs->file directly. 121 * 122 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in 123 * bs->file where sector data can be read from as raw data. 124 * 125 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present. 126 * 127 * DATA ZERO OFFSET_VALID 128 * t t t sectors read as zero, bs->file is zero at offset 129 * t f t sectors read as valid from bs->file at offset 130 * f t t sectors preallocated, read as zero, bs->file not 131 * necessarily zero at offset 132 * f f t sectors preallocated but read from backing_hd, 133 * bs->file contains garbage at offset 134 * t t f sectors preallocated, read as zero, unknown offset 135 * t f f sectors read from unknown file or offset 136 * f t f not allocated or unknown offset, read as zero 137 * f f f not allocated or unknown offset, read from backing_hd 138 */ 139 #define BDRV_BLOCK_DATA 0x01 140 #define BDRV_BLOCK_ZERO 0x02 141 #define BDRV_BLOCK_OFFSET_VALID 0x04 142 #define BDRV_BLOCK_RAW 0x08 143 #define BDRV_BLOCK_ALLOCATED 0x10 144 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK 145 146 typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue; 147 148 typedef struct BDRVReopenState { 149 BlockDriverState *bs; 150 int flags; 151 QDict *options; 152 void *opaque; 153 } BDRVReopenState; 154 155 /* 156 * Block operation types 157 */ 158 typedef enum BlockOpType { 159 BLOCK_OP_TYPE_BACKUP_SOURCE, 160 BLOCK_OP_TYPE_BACKUP_TARGET, 161 BLOCK_OP_TYPE_CHANGE, 162 BLOCK_OP_TYPE_COMMIT_SOURCE, 163 BLOCK_OP_TYPE_COMMIT_TARGET, 164 BLOCK_OP_TYPE_DATAPLANE, 165 BLOCK_OP_TYPE_DRIVE_DEL, 166 BLOCK_OP_TYPE_EJECT, 167 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, 168 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, 169 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, 170 BLOCK_OP_TYPE_MIRROR, 171 BLOCK_OP_TYPE_RESIZE, 172 BLOCK_OP_TYPE_STREAM, 173 BLOCK_OP_TYPE_REPLACE, 174 BLOCK_OP_TYPE_MAX, 175 } BlockOpType; 176 177 void bdrv_info_print(Monitor *mon, const QObject *data); 178 void bdrv_info(Monitor *mon, QObject **ret_data); 179 void bdrv_stats_print(Monitor *mon, const QObject *data); 180 void bdrv_info_stats(Monitor *mon, QObject **ret_data); 181 182 /* disk I/O throttling */ 183 void bdrv_io_limits_enable(BlockDriverState *bs, const char *group); 184 void bdrv_io_limits_disable(BlockDriverState *bs); 185 void bdrv_io_limits_update_group(BlockDriverState *bs, const char *group); 186 187 void bdrv_init(void); 188 void bdrv_init_with_whitelist(void); 189 BlockDriver *bdrv_find_protocol(const char *filename, 190 bool allow_protocol_prefix, 191 Error **errp); 192 BlockDriver *bdrv_find_format(const char *format_name); 193 int bdrv_create(BlockDriver *drv, const char* filename, 194 QemuOpts *opts, Error **errp); 195 int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); 196 BlockDriverState *bdrv_new_root(void); 197 BlockDriverState *bdrv_new(void); 198 void bdrv_make_anon(BlockDriverState *bs); 199 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old); 200 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); 201 void bdrv_replace_in_backing_chain(BlockDriverState *old, 202 BlockDriverState *new); 203 204 int bdrv_parse_cache_flags(const char *mode, int *flags); 205 int bdrv_parse_discard_flags(const char *mode, int *flags); 206 BdrvChild *bdrv_open_child(const char *filename, 207 QDict *options, const char *bdref_key, 208 BlockDriverState* parent, 209 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, Error **errp); 216 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, 217 BlockDriverState *bs, 218 QDict *options, 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_no_copy_on_readv(BlockDriverState *bs, 251 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); 252 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, 253 int nb_sectors, QEMUIOVector *qiov); 254 /* 255 * Efficiently zero a region of the disk image. Note that this is a regular 256 * I/O request like read or write and should have a reasonable size. This 257 * function is not suitable for zeroing the entire image in a single request 258 * because it may allocate memory for the entire region. 259 */ 260 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, 261 int nb_sectors, BdrvRequestFlags flags); 262 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 263 const char *backing_file); 264 int bdrv_get_backing_file_depth(BlockDriverState *bs); 265 void bdrv_refresh_filename(BlockDriverState *bs); 266 int bdrv_truncate(BlockDriverState *bs, int64_t offset); 267 int64_t bdrv_nb_sectors(BlockDriverState *bs); 268 int64_t bdrv_getlength(BlockDriverState *bs); 269 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); 270 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); 271 void bdrv_refresh_limits(BlockDriverState *bs, Error **errp); 272 int bdrv_commit(BlockDriverState *bs); 273 int bdrv_commit_all(void); 274 int bdrv_change_backing_file(BlockDriverState *bs, 275 const char *backing_file, const char *backing_fmt); 276 void bdrv_register(BlockDriver *bdrv); 277 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, 278 BlockDriverState *base, 279 const char *backing_file_str); 280 BlockDriverState *bdrv_find_overlay(BlockDriverState *active, 281 BlockDriverState *bs); 282 BlockDriverState *bdrv_find_base(BlockDriverState *bs); 283 284 285 typedef struct BdrvCheckResult { 286 int corruptions; 287 int leaks; 288 int check_errors; 289 int corruptions_fixed; 290 int leaks_fixed; 291 int64_t image_end_offset; 292 BlockFragInfo bfi; 293 } BdrvCheckResult; 294 295 typedef enum { 296 BDRV_FIX_LEAKS = 1, 297 BDRV_FIX_ERRORS = 2, 298 } BdrvCheckMode; 299 300 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); 301 302 /* The units of offset and total_work_size may be chosen arbitrarily by the 303 * block driver; total_work_size may change during the course of the amendment 304 * operation */ 305 typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset, 306 int64_t total_work_size); 307 int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts, 308 BlockDriverAmendStatusCB *status_cb); 309 310 /* external snapshots */ 311 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, 312 BlockDriverState *candidate); 313 bool bdrv_is_first_non_filter(BlockDriverState *candidate); 314 315 /* check if a named node can be replaced when doing drive-mirror */ 316 BlockDriverState *check_to_replace_node(BlockDriverState *parent_bs, 317 const char *node_name, Error **errp); 318 319 /* async block I/O */ 320 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, 321 int sector_num); 322 BlockAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, 323 QEMUIOVector *iov, int nb_sectors, 324 BlockCompletionFunc *cb, void *opaque); 325 BlockAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, 326 QEMUIOVector *iov, int nb_sectors, 327 BlockCompletionFunc *cb, void *opaque); 328 BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs, 329 BlockCompletionFunc *cb, void *opaque); 330 BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs, 331 int64_t sector_num, int nb_sectors, 332 BlockCompletionFunc *cb, void *opaque); 333 void bdrv_aio_cancel(BlockAIOCB *acb); 334 void bdrv_aio_cancel_async(BlockAIOCB *acb); 335 336 typedef struct BlockRequest { 337 /* Fields to be filled by multiwrite caller */ 338 int64_t sector; 339 int nb_sectors; 340 int flags; 341 QEMUIOVector *qiov; 342 BlockCompletionFunc *cb; 343 void *opaque; 344 345 /* Filled by multiwrite implementation */ 346 int error; 347 } BlockRequest; 348 349 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, 350 int num_reqs); 351 352 /* sg packet commands */ 353 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); 354 BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, 355 unsigned long int req, void *buf, 356 BlockCompletionFunc *cb, void *opaque); 357 358 /* Invalidate any cached metadata used by image formats */ 359 void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp); 360 void bdrv_invalidate_cache_all(Error **errp); 361 362 /* Ensure contents are flushed to disk. */ 363 int bdrv_flush(BlockDriverState *bs); 364 int coroutine_fn bdrv_co_flush(BlockDriverState *bs); 365 int bdrv_flush_all(void); 366 void bdrv_close_all(void); 367 void bdrv_drain(BlockDriverState *bs); 368 void bdrv_drain_all(void); 369 370 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 371 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 372 int bdrv_has_zero_init_1(BlockDriverState *bs); 373 int bdrv_has_zero_init(BlockDriverState *bs); 374 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs); 375 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs); 376 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, 377 int nb_sectors, int *pnum); 378 int64_t bdrv_get_block_status_above(BlockDriverState *bs, 379 BlockDriverState *base, 380 int64_t sector_num, 381 int nb_sectors, int *pnum); 382 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, 383 int *pnum); 384 int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, 385 int64_t sector_num, int nb_sectors, int *pnum); 386 387 int bdrv_is_read_only(BlockDriverState *bs); 388 int bdrv_is_sg(BlockDriverState *bs); 389 int bdrv_enable_write_cache(BlockDriverState *bs); 390 void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce); 391 bool bdrv_is_inserted(BlockDriverState *bs); 392 int bdrv_media_changed(BlockDriverState *bs); 393 void bdrv_lock_medium(BlockDriverState *bs, bool locked); 394 void bdrv_eject(BlockDriverState *bs, bool eject_flag); 395 const char *bdrv_get_format_name(BlockDriverState *bs); 396 BlockDriverState *bdrv_find_node(const char *node_name); 397 BlockDeviceInfoList *bdrv_named_nodes_list(Error **errp); 398 BlockDriverState *bdrv_lookup_bs(const char *device, 399 const char *node_name, 400 Error **errp); 401 bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base); 402 BlockDriverState *bdrv_next_node(BlockDriverState *bs); 403 BlockDriverState *bdrv_next(BlockDriverState *bs); 404 int bdrv_is_encrypted(BlockDriverState *bs); 405 int bdrv_key_required(BlockDriverState *bs); 406 int bdrv_set_key(BlockDriverState *bs, const char *key); 407 void bdrv_add_key(BlockDriverState *bs, const char *key, Error **errp); 408 int bdrv_query_missing_keys(void); 409 void bdrv_iterate_format(void (*it)(void *opaque, const char *name), 410 void *opaque); 411 const char *bdrv_get_node_name(const BlockDriverState *bs); 412 const char *bdrv_get_device_name(const BlockDriverState *bs); 413 const char *bdrv_get_device_or_node_name(const BlockDriverState *bs); 414 int bdrv_get_flags(BlockDriverState *bs); 415 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, 416 const uint8_t *buf, int nb_sectors); 417 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); 418 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); 419 void bdrv_round_to_clusters(BlockDriverState *bs, 420 int64_t sector_num, int nb_sectors, 421 int64_t *cluster_sector_num, 422 int *cluster_nb_sectors); 423 424 const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 425 void bdrv_get_backing_filename(BlockDriverState *bs, 426 char *filename, int filename_size); 427 void bdrv_get_full_backing_filename(BlockDriverState *bs, 428 char *dest, size_t sz, Error **errp); 429 void bdrv_get_full_backing_filename_from_filename(const char *backed, 430 const char *backing, 431 char *dest, size_t sz, 432 Error **errp); 433 int bdrv_is_snapshot(BlockDriverState *bs); 434 435 int path_has_protocol(const char *path); 436 int path_is_absolute(const char *path); 437 void path_combine(char *dest, int dest_size, 438 const char *base_path, 439 const char *filename); 440 441 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); 442 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, 443 int64_t pos, int size); 444 445 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, 446 int64_t pos, int size); 447 448 void bdrv_img_create(const char *filename, const char *fmt, 449 const char *base_filename, const char *base_fmt, 450 char *options, uint64_t img_size, int flags, 451 Error **errp, bool quiet); 452 453 /* Returns the alignment in bytes that is required so that no bounce buffer 454 * is required throughout the stack */ 455 size_t bdrv_min_mem_align(BlockDriverState *bs); 456 /* Returns optimal alignment in bytes for bounce buffer */ 457 size_t bdrv_opt_mem_align(BlockDriverState *bs); 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 void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child); 507 508 bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp); 509 void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason); 510 void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason); 511 void bdrv_op_block_all(BlockDriverState *bs, Error *reason); 512 void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason); 513 bool bdrv_op_blocker_is_empty(BlockDriverState *bs); 514 515 typedef enum { 516 BLKDBG_L1_UPDATE, 517 518 BLKDBG_L1_GROW_ALLOC_TABLE, 519 BLKDBG_L1_GROW_WRITE_TABLE, 520 BLKDBG_L1_GROW_ACTIVATE_TABLE, 521 522 BLKDBG_L2_LOAD, 523 BLKDBG_L2_UPDATE, 524 BLKDBG_L2_UPDATE_COMPRESSED, 525 BLKDBG_L2_ALLOC_COW_READ, 526 BLKDBG_L2_ALLOC_WRITE, 527 528 BLKDBG_READ_AIO, 529 BLKDBG_READ_BACKING_AIO, 530 BLKDBG_READ_COMPRESSED, 531 532 BLKDBG_WRITE_AIO, 533 BLKDBG_WRITE_COMPRESSED, 534 535 BLKDBG_VMSTATE_LOAD, 536 BLKDBG_VMSTATE_SAVE, 537 538 BLKDBG_COW_READ, 539 BLKDBG_COW_WRITE, 540 541 BLKDBG_REFTABLE_LOAD, 542 BLKDBG_REFTABLE_GROW, 543 BLKDBG_REFTABLE_UPDATE, 544 545 BLKDBG_REFBLOCK_LOAD, 546 BLKDBG_REFBLOCK_UPDATE, 547 BLKDBG_REFBLOCK_UPDATE_PART, 548 BLKDBG_REFBLOCK_ALLOC, 549 BLKDBG_REFBLOCK_ALLOC_HOOKUP, 550 BLKDBG_REFBLOCK_ALLOC_WRITE, 551 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, 552 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, 553 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, 554 555 BLKDBG_CLUSTER_ALLOC, 556 BLKDBG_CLUSTER_ALLOC_BYTES, 557 BLKDBG_CLUSTER_FREE, 558 559 BLKDBG_FLUSH_TO_OS, 560 BLKDBG_FLUSH_TO_DISK, 561 562 BLKDBG_PWRITEV_RMW_HEAD, 563 BLKDBG_PWRITEV_RMW_AFTER_HEAD, 564 BLKDBG_PWRITEV_RMW_TAIL, 565 BLKDBG_PWRITEV_RMW_AFTER_TAIL, 566 BLKDBG_PWRITEV, 567 BLKDBG_PWRITEV_ZERO, 568 BLKDBG_PWRITEV_DONE, 569 570 BLKDBG_EMPTY_IMAGE_PREPARE, 571 572 BLKDBG_EVENT_MAX, 573 } BlkDebugEvent; 574 575 #define BLKDBG_EVENT(child, evt) \ 576 do { \ 577 if (child) { \ 578 bdrv_debug_event(child->bs, evt); \ 579 } \ 580 } while (0) 581 582 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); 583 584 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, 585 const char *tag); 586 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag); 587 int bdrv_debug_resume(BlockDriverState *bs, const char *tag); 588 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); 589 590 /** 591 * bdrv_get_aio_context: 592 * 593 * Returns: the currently bound #AioContext 594 */ 595 AioContext *bdrv_get_aio_context(BlockDriverState *bs); 596 597 /** 598 * bdrv_set_aio_context: 599 * 600 * Changes the #AioContext used for fd handlers, timers, and BHs by this 601 * BlockDriverState and all its children. 602 * 603 * This function must be called with iothread lock held. 604 */ 605 void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context); 606 int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz); 607 int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo); 608 609 void bdrv_io_plug(BlockDriverState *bs); 610 void bdrv_io_unplug(BlockDriverState *bs); 611 void bdrv_flush_io_queue(BlockDriverState *bs); 612 613 /** 614 * bdrv_drained_begin: 615 * 616 * Begin a quiesced section for exclusive access to the BDS, by disabling 617 * external request sources including NBD server and device model. Note that 618 * this doesn't block timers or coroutines from submitting more requests, which 619 * means block_job_pause is still necessary. 620 * 621 * This function can be recursive. 622 */ 623 void bdrv_drained_begin(BlockDriverState *bs); 624 625 /** 626 * bdrv_drained_end: 627 * 628 * End a quiescent section started by bdrv_drained_begin(). 629 */ 630 void bdrv_drained_end(BlockDriverState *bs); 631 632 #endif 633