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 "qapi/qmp/qobject.h" 9 #include "qapi-types.h" 10 11 /* block.c */ 12 typedef struct BlockDriver BlockDriver; 13 typedef struct BlockJob BlockJob; 14 15 typedef struct BlockDriverInfo { 16 /* in bytes, 0 if irrelevant */ 17 int cluster_size; 18 /* offset at which the VM state can be saved (0 if not possible) */ 19 int64_t vm_state_offset; 20 bool is_dirty; 21 /* 22 * True if unallocated blocks read back as zeroes. This is equivalent 23 * to the the LBPRZ flag in the SCSI logical block provisioning page. 24 */ 25 bool unallocated_blocks_are_zero; 26 /* 27 * True if the driver can optimize writing zeroes by unmapping 28 * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux 29 * with the difference that in qemu a discard is allowed to silently 30 * fail. Therefore we have to use bdrv_write_zeroes with the 31 * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping. 32 * After this call the driver has to guarantee that the contents read 33 * back as zero. It is additionally required that the block device is 34 * opened with BDRV_O_UNMAP flag for this to work. 35 */ 36 bool can_write_zeroes_with_unmap; 37 /* 38 * True if this block driver only supports compressed writes 39 */ 40 bool needs_compressed_writes; 41 } BlockDriverInfo; 42 43 typedef struct BlockFragInfo { 44 uint64_t allocated_clusters; 45 uint64_t total_clusters; 46 uint64_t fragmented_clusters; 47 uint64_t compressed_clusters; 48 } BlockFragInfo; 49 50 /* Callbacks for block device models */ 51 typedef struct BlockDevOps { 52 /* 53 * Runs when virtual media changed (monitor commands eject, change) 54 * Argument load is true on load and false on eject. 55 * Beware: doesn't run when a host device's physical media 56 * changes. Sure would be useful if it did. 57 * Device models with removable media must implement this callback. 58 */ 59 void (*change_media_cb)(void *opaque, bool load); 60 /* 61 * Runs when an eject request is issued from the monitor, the tray 62 * is closed, and the medium is locked. 63 * Device models that do not implement is_medium_locked will not need 64 * this callback. Device models that can lock the medium or tray might 65 * want to implement the callback and unlock the tray when "force" is 66 * true, even if they do not support eject requests. 67 */ 68 void (*eject_request_cb)(void *opaque, bool force); 69 /* 70 * Is the virtual tray open? 71 * Device models implement this only when the device has a tray. 72 */ 73 bool (*is_tray_open)(void *opaque); 74 /* 75 * Is the virtual medium locked into the device? 76 * Device models implement this only when device has such a lock. 77 */ 78 bool (*is_medium_locked)(void *opaque); 79 /* 80 * Runs when the size changed (e.g. monitor command block_resize) 81 */ 82 void (*resize_cb)(void *opaque); 83 } BlockDevOps; 84 85 typedef enum { 86 BDRV_REQ_COPY_ON_READ = 0x1, 87 BDRV_REQ_ZERO_WRITE = 0x2, 88 /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver 89 * is allowed to optimize a write zeroes request by unmapping (discarding) 90 * blocks if it is guaranteed that the result will read back as 91 * zeroes. The flag is only passed to the driver if the block device is 92 * opened with BDRV_O_UNMAP. 93 */ 94 BDRV_REQ_MAY_UNMAP = 0x4, 95 } BdrvRequestFlags; 96 97 #define BDRV_O_RDWR 0x0002 98 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ 99 #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */ 100 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ 101 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ 102 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ 103 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ 104 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ 105 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ 106 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */ 107 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */ 108 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */ 109 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */ 110 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given: 111 select an appropriate protocol driver, 112 ignoring the format layer */ 113 114 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH) 115 116 #define BDRV_SECTOR_BITS 9 117 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) 118 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) 119 120 /* BDRV_BLOCK_DATA: data is read from bs->file or another file 121 * BDRV_BLOCK_ZERO: sectors read as zero 122 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data 123 * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this 124 * layer (as opposed to the backing file) 125 * BDRV_BLOCK_RAW: used internally to indicate that the request 126 * was answered by the raw driver and that one 127 * should look in bs->file directly. 128 * 129 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in 130 * bs->file where sector data can be read from as raw data. 131 * 132 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present. 133 * 134 * DATA ZERO OFFSET_VALID 135 * t t t sectors read as zero, bs->file is zero at offset 136 * t f t sectors read as valid from bs->file at offset 137 * f t t sectors preallocated, read as zero, bs->file not 138 * necessarily zero at offset 139 * f f t sectors preallocated but read from backing_hd, 140 * bs->file contains garbage at offset 141 * t t f sectors preallocated, read as zero, unknown offset 142 * t f f sectors read from unknown file or offset 143 * f t f not allocated or unknown offset, read as zero 144 * f f f not allocated or unknown offset, read from backing_hd 145 */ 146 #define BDRV_BLOCK_DATA 0x01 147 #define BDRV_BLOCK_ZERO 0x02 148 #define BDRV_BLOCK_OFFSET_VALID 0x04 149 #define BDRV_BLOCK_RAW 0x08 150 #define BDRV_BLOCK_ALLOCATED 0x10 151 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK 152 153 typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue; 154 155 typedef struct BDRVReopenState { 156 BlockDriverState *bs; 157 int flags; 158 void *opaque; 159 } BDRVReopenState; 160 161 /* 162 * Block operation types 163 */ 164 typedef enum BlockOpType { 165 BLOCK_OP_TYPE_BACKUP_SOURCE, 166 BLOCK_OP_TYPE_BACKUP_TARGET, 167 BLOCK_OP_TYPE_CHANGE, 168 BLOCK_OP_TYPE_COMMIT, 169 BLOCK_OP_TYPE_DATAPLANE, 170 BLOCK_OP_TYPE_DRIVE_DEL, 171 BLOCK_OP_TYPE_EJECT, 172 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, 173 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, 174 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, 175 BLOCK_OP_TYPE_MIRROR, 176 BLOCK_OP_TYPE_RESIZE, 177 BLOCK_OP_TYPE_STREAM, 178 BLOCK_OP_TYPE_MAX, 179 } BlockOpType; 180 181 void bdrv_iostatus_enable(BlockDriverState *bs); 182 void bdrv_iostatus_reset(BlockDriverState *bs); 183 void bdrv_iostatus_disable(BlockDriverState *bs); 184 bool bdrv_iostatus_is_enabled(const BlockDriverState *bs); 185 void bdrv_iostatus_set_err(BlockDriverState *bs, int error); 186 void bdrv_info_print(Monitor *mon, const QObject *data); 187 void bdrv_info(Monitor *mon, QObject **ret_data); 188 void bdrv_stats_print(Monitor *mon, const QObject *data); 189 void bdrv_info_stats(Monitor *mon, QObject **ret_data); 190 191 /* disk I/O throttling */ 192 void bdrv_io_limits_enable(BlockDriverState *bs); 193 void bdrv_io_limits_disable(BlockDriverState *bs); 194 195 void bdrv_init(void); 196 void bdrv_init_with_whitelist(void); 197 BlockDriver *bdrv_find_protocol(const char *filename, 198 bool allow_protocol_prefix); 199 BlockDriver *bdrv_find_format(const char *format_name); 200 BlockDriver *bdrv_find_whitelisted_format(const char *format_name, 201 bool readonly); 202 int bdrv_create(BlockDriver *drv, const char* filename, 203 QemuOpts *opts, Error **errp); 204 int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); 205 BlockDriverState *bdrv_new(const char *device_name, Error **errp); 206 void bdrv_make_anon(BlockDriverState *bs); 207 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old); 208 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); 209 int bdrv_parse_cache_flags(const char *mode, int *flags); 210 int bdrv_parse_discard_flags(const char *mode, int *flags); 211 int bdrv_open_image(BlockDriverState **pbs, const char *filename, 212 QDict *options, const char *bdref_key, int flags, 213 bool allow_none, Error **errp); 214 void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd); 215 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp); 216 void bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp); 217 int bdrv_open(BlockDriverState **pbs, const char *filename, 218 const char *reference, QDict *options, int flags, 219 BlockDriver *drv, Error **errp); 220 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, 221 BlockDriverState *bs, int flags); 222 int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp); 223 int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp); 224 int bdrv_reopen_prepare(BDRVReopenState *reopen_state, 225 BlockReopenQueue *queue, Error **errp); 226 void bdrv_reopen_commit(BDRVReopenState *reopen_state); 227 void bdrv_reopen_abort(BDRVReopenState *reopen_state); 228 void bdrv_close(BlockDriverState *bs); 229 void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify); 230 int bdrv_attach_dev(BlockDriverState *bs, void *dev); 231 void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev); 232 void bdrv_detach_dev(BlockDriverState *bs, void *dev); 233 void *bdrv_get_attached_dev(BlockDriverState *bs); 234 void bdrv_set_dev_ops(BlockDriverState *bs, const BlockDevOps *ops, 235 void *opaque); 236 void bdrv_dev_eject_request(BlockDriverState *bs, bool force); 237 bool bdrv_dev_has_removable_media(BlockDriverState *bs); 238 bool bdrv_dev_is_tray_open(BlockDriverState *bs); 239 bool bdrv_dev_is_medium_locked(BlockDriverState *bs); 240 int bdrv_read(BlockDriverState *bs, int64_t sector_num, 241 uint8_t *buf, int nb_sectors); 242 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num, 243 uint8_t *buf, int nb_sectors); 244 int bdrv_write(BlockDriverState *bs, int64_t sector_num, 245 const uint8_t *buf, int nb_sectors); 246 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num, 247 int nb_sectors, BdrvRequestFlags flags); 248 BlockDriverAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num, 249 int nb_sectors, BdrvRequestFlags flags, 250 BlockDriverCompletionFunc *cb, void *opaque); 251 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags); 252 int bdrv_pread(BlockDriverState *bs, int64_t offset, 253 void *buf, int count); 254 int bdrv_pwrite(BlockDriverState *bs, int64_t offset, 255 const void *buf, int count); 256 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov); 257 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, 258 const void *buf, int count); 259 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, 260 int nb_sectors, QEMUIOVector *qiov); 261 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs, 262 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); 263 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, 264 int nb_sectors, QEMUIOVector *qiov); 265 /* 266 * Efficiently zero a region of the disk image. Note that this is a regular 267 * I/O request like read or write and should have a reasonable size. This 268 * function is not suitable for zeroing the entire image in a single request 269 * because it may allocate memory for the entire region. 270 */ 271 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, 272 int nb_sectors, BdrvRequestFlags flags); 273 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 274 const char *backing_file); 275 int bdrv_get_backing_file_depth(BlockDriverState *bs); 276 int bdrv_truncate(BlockDriverState *bs, int64_t offset); 277 int64_t bdrv_getlength(BlockDriverState *bs); 278 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); 279 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); 280 int bdrv_refresh_limits(BlockDriverState *bs); 281 int bdrv_commit(BlockDriverState *bs); 282 int bdrv_commit_all(void); 283 int bdrv_change_backing_file(BlockDriverState *bs, 284 const char *backing_file, const char *backing_fmt); 285 void bdrv_register(BlockDriver *bdrv); 286 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, 287 BlockDriverState *base); 288 BlockDriverState *bdrv_find_overlay(BlockDriverState *active, 289 BlockDriverState *bs); 290 BlockDriverState *bdrv_find_base(BlockDriverState *bs); 291 292 293 typedef struct BdrvCheckResult { 294 int corruptions; 295 int leaks; 296 int check_errors; 297 int corruptions_fixed; 298 int leaks_fixed; 299 int64_t image_end_offset; 300 BlockFragInfo bfi; 301 } BdrvCheckResult; 302 303 typedef enum { 304 BDRV_FIX_LEAKS = 1, 305 BDRV_FIX_ERRORS = 2, 306 } BdrvCheckMode; 307 308 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); 309 310 int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts); 311 312 /* external snapshots */ 313 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, 314 BlockDriverState *candidate); 315 bool bdrv_is_first_non_filter(BlockDriverState *candidate); 316 317 /* async block I/O */ 318 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, 319 int sector_num); 320 BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, 321 QEMUIOVector *iov, int nb_sectors, 322 BlockDriverCompletionFunc *cb, void *opaque); 323 BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, 324 QEMUIOVector *iov, int nb_sectors, 325 BlockDriverCompletionFunc *cb, void *opaque); 326 BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, 327 BlockDriverCompletionFunc *cb, void *opaque); 328 BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs, 329 int64_t sector_num, int nb_sectors, 330 BlockDriverCompletionFunc *cb, void *opaque); 331 void bdrv_aio_cancel(BlockDriverAIOCB *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 BlockDriverCompletionFunc *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 BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, 352 unsigned long int req, void *buf, 353 BlockDriverCompletionFunc *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 void bdrv_clear_incoming_migration_all(void); 360 361 /* Ensure contents are flushed to disk. */ 362 int bdrv_flush(BlockDriverState *bs); 363 int coroutine_fn bdrv_co_flush(BlockDriverState *bs); 364 int bdrv_flush_all(void); 365 void bdrv_close_all(void); 366 void bdrv_drain_all(void); 367 368 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 369 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 370 int bdrv_has_zero_init_1(BlockDriverState *bs); 371 int bdrv_has_zero_init(BlockDriverState *bs); 372 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs); 373 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs); 374 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, 375 int nb_sectors, int *pnum); 376 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, 377 int *pnum); 378 int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, 379 int64_t sector_num, int nb_sectors, int *pnum); 380 381 void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error, 382 BlockdevOnError on_write_error); 383 BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read); 384 BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error); 385 void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action, 386 bool is_read, int error); 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 int 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(const char *name); 397 BlockDriverState *bdrv_find_node(const char *node_name); 398 BlockDeviceInfoList *bdrv_named_nodes_list(void); 399 BlockDriverState *bdrv_lookup_bs(const char *device, 400 const char *node_name, 401 Error **errp); 402 BlockDriverState *bdrv_next(BlockDriverState *bs); 403 void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), 404 void *opaque); 405 int bdrv_is_encrypted(BlockDriverState *bs); 406 int bdrv_key_required(BlockDriverState *bs); 407 int bdrv_set_key(BlockDriverState *bs, const char *key); 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_device_name(BlockDriverState *bs); 412 int bdrv_get_flags(BlockDriverState *bs); 413 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, 414 const uint8_t *buf, int nb_sectors); 415 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); 416 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); 417 void bdrv_round_to_clusters(BlockDriverState *bs, 418 int64_t sector_num, int nb_sectors, 419 int64_t *cluster_sector_num, 420 int *cluster_nb_sectors); 421 422 const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 423 void bdrv_get_backing_filename(BlockDriverState *bs, 424 char *filename, int filename_size); 425 void bdrv_get_full_backing_filename(BlockDriverState *bs, 426 char *dest, size_t sz); 427 int bdrv_is_snapshot(BlockDriverState *bs); 428 429 int path_is_absolute(const char *path); 430 void path_combine(char *dest, int dest_size, 431 const char *base_path, 432 const char *filename); 433 434 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); 435 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, 436 int64_t pos, int size); 437 438 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, 439 int64_t pos, int size); 440 441 void bdrv_img_create(const char *filename, const char *fmt, 442 const char *base_filename, const char *base_fmt, 443 char *options, uint64_t img_size, int flags, 444 Error **errp, bool quiet); 445 446 /* Returns the alignment in bytes that is required so that no bounce buffer 447 * is required throughout the stack */ 448 size_t bdrv_opt_mem_align(BlockDriverState *bs); 449 void bdrv_set_guest_block_size(BlockDriverState *bs, int align); 450 void *qemu_blockalign(BlockDriverState *bs, size_t size); 451 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov); 452 453 struct HBitmapIter; 454 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap; 455 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, int granularity, 456 Error **errp); 457 void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 458 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs); 459 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector); 460 void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors); 461 void bdrv_reset_dirty(BlockDriverState *bs, 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 enum BlockAcctType { 480 BDRV_ACCT_READ, 481 BDRV_ACCT_WRITE, 482 BDRV_ACCT_FLUSH, 483 BDRV_MAX_IOTYPE, 484 }; 485 486 typedef struct BlockAcctCookie { 487 int64_t bytes; 488 int64_t start_time_ns; 489 enum BlockAcctType type; 490 } BlockAcctCookie; 491 492 void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie, 493 int64_t bytes, enum BlockAcctType type); 494 void bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie); 495 496 typedef enum { 497 BLKDBG_L1_UPDATE, 498 499 BLKDBG_L1_GROW_ALLOC_TABLE, 500 BLKDBG_L1_GROW_WRITE_TABLE, 501 BLKDBG_L1_GROW_ACTIVATE_TABLE, 502 503 BLKDBG_L2_LOAD, 504 BLKDBG_L2_UPDATE, 505 BLKDBG_L2_UPDATE_COMPRESSED, 506 BLKDBG_L2_ALLOC_COW_READ, 507 BLKDBG_L2_ALLOC_WRITE, 508 509 BLKDBG_READ_AIO, 510 BLKDBG_READ_BACKING_AIO, 511 BLKDBG_READ_COMPRESSED, 512 513 BLKDBG_WRITE_AIO, 514 BLKDBG_WRITE_COMPRESSED, 515 516 BLKDBG_VMSTATE_LOAD, 517 BLKDBG_VMSTATE_SAVE, 518 519 BLKDBG_COW_READ, 520 BLKDBG_COW_WRITE, 521 522 BLKDBG_REFTABLE_LOAD, 523 BLKDBG_REFTABLE_GROW, 524 BLKDBG_REFTABLE_UPDATE, 525 526 BLKDBG_REFBLOCK_LOAD, 527 BLKDBG_REFBLOCK_UPDATE, 528 BLKDBG_REFBLOCK_UPDATE_PART, 529 BLKDBG_REFBLOCK_ALLOC, 530 BLKDBG_REFBLOCK_ALLOC_HOOKUP, 531 BLKDBG_REFBLOCK_ALLOC_WRITE, 532 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, 533 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, 534 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, 535 536 BLKDBG_CLUSTER_ALLOC, 537 BLKDBG_CLUSTER_ALLOC_BYTES, 538 BLKDBG_CLUSTER_FREE, 539 540 BLKDBG_FLUSH_TO_OS, 541 BLKDBG_FLUSH_TO_DISK, 542 543 BLKDBG_PWRITEV_RMW_HEAD, 544 BLKDBG_PWRITEV_RMW_AFTER_HEAD, 545 BLKDBG_PWRITEV_RMW_TAIL, 546 BLKDBG_PWRITEV_RMW_AFTER_TAIL, 547 BLKDBG_PWRITEV, 548 BLKDBG_PWRITEV_ZERO, 549 BLKDBG_PWRITEV_DONE, 550 551 BLKDBG_EVENT_MAX, 552 } BlkDebugEvent; 553 554 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) 555 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); 556 557 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, 558 const char *tag); 559 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag); 560 int bdrv_debug_resume(BlockDriverState *bs, const char *tag); 561 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); 562 563 /** 564 * bdrv_get_aio_context: 565 * 566 * Returns: the currently bound #AioContext 567 */ 568 AioContext *bdrv_get_aio_context(BlockDriverState *bs); 569 570 /** 571 * bdrv_set_aio_context: 572 * 573 * Changes the #AioContext used for fd handlers, timers, and BHs by this 574 * BlockDriverState and all its children. 575 * 576 * This function must be called from the old #AioContext or with a lock held so 577 * the old #AioContext is not executing. 578 */ 579 void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context); 580 581 #endif 582