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_REPLACE, 179 BLOCK_OP_TYPE_MAX, 180 } BlockOpType; 181 182 void bdrv_iostatus_enable(BlockDriverState *bs); 183 void bdrv_iostatus_reset(BlockDriverState *bs); 184 void bdrv_iostatus_disable(BlockDriverState *bs); 185 bool bdrv_iostatus_is_enabled(const BlockDriverState *bs); 186 void bdrv_iostatus_set_err(BlockDriverState *bs, int error); 187 void bdrv_info_print(Monitor *mon, const QObject *data); 188 void bdrv_info(Monitor *mon, QObject **ret_data); 189 void bdrv_stats_print(Monitor *mon, const QObject *data); 190 void bdrv_info_stats(Monitor *mon, QObject **ret_data); 191 192 /* disk I/O throttling */ 193 void bdrv_io_limits_enable(BlockDriverState *bs); 194 void bdrv_io_limits_disable(BlockDriverState *bs); 195 196 void bdrv_init(void); 197 void bdrv_init_with_whitelist(void); 198 BlockDriver *bdrv_find_protocol(const char *filename, 199 bool allow_protocol_prefix); 200 BlockDriver *bdrv_find_format(const char *format_name); 201 BlockDriver *bdrv_find_whitelisted_format(const char *format_name, 202 bool readonly); 203 int bdrv_create(BlockDriver *drv, const char* filename, 204 QemuOpts *opts, Error **errp); 205 int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); 206 BlockDriverState *bdrv_new(const char *device_name, Error **errp); 207 void bdrv_make_anon(BlockDriverState *bs); 208 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old); 209 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); 210 int bdrv_parse_cache_flags(const char *mode, int *flags); 211 int bdrv_parse_discard_flags(const char *mode, int *flags); 212 int bdrv_open_image(BlockDriverState **pbs, const char *filename, 213 QDict *options, const char *bdref_key, int flags, 214 bool allow_none, Error **errp); 215 void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd); 216 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp); 217 int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp); 218 int bdrv_open(BlockDriverState **pbs, const char *filename, 219 const char *reference, QDict *options, int flags, 220 BlockDriver *drv, Error **errp); 221 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, 222 BlockDriverState *bs, int flags); 223 int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp); 224 int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp); 225 int bdrv_reopen_prepare(BDRVReopenState *reopen_state, 226 BlockReopenQueue *queue, Error **errp); 227 void bdrv_reopen_commit(BDRVReopenState *reopen_state); 228 void bdrv_reopen_abort(BDRVReopenState *reopen_state); 229 void bdrv_close(BlockDriverState *bs); 230 void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify); 231 int bdrv_attach_dev(BlockDriverState *bs, void *dev); 232 void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev); 233 void bdrv_detach_dev(BlockDriverState *bs, void *dev); 234 void *bdrv_get_attached_dev(BlockDriverState *bs); 235 void bdrv_set_dev_ops(BlockDriverState *bs, const BlockDevOps *ops, 236 void *opaque); 237 void bdrv_dev_eject_request(BlockDriverState *bs, bool force); 238 bool bdrv_dev_has_removable_media(BlockDriverState *bs); 239 bool bdrv_dev_is_tray_open(BlockDriverState *bs); 240 bool bdrv_dev_is_medium_locked(BlockDriverState *bs); 241 int bdrv_read(BlockDriverState *bs, int64_t sector_num, 242 uint8_t *buf, int nb_sectors); 243 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num, 244 uint8_t *buf, int nb_sectors); 245 int bdrv_write(BlockDriverState *bs, int64_t sector_num, 246 const uint8_t *buf, int nb_sectors); 247 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num, 248 int nb_sectors, BdrvRequestFlags flags); 249 BlockDriverAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num, 250 int nb_sectors, BdrvRequestFlags flags, 251 BlockDriverCompletionFunc *cb, void *opaque); 252 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags); 253 int bdrv_pread(BlockDriverState *bs, int64_t offset, 254 void *buf, int count); 255 int bdrv_pwrite(BlockDriverState *bs, int64_t offset, 256 const void *buf, int count); 257 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov); 258 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, 259 const void *buf, int count); 260 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, 261 int nb_sectors, QEMUIOVector *qiov); 262 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs, 263 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); 264 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, 265 int nb_sectors, QEMUIOVector *qiov); 266 /* 267 * Efficiently zero a region of the disk image. Note that this is a regular 268 * I/O request like read or write and should have a reasonable size. This 269 * function is not suitable for zeroing the entire image in a single request 270 * because it may allocate memory for the entire region. 271 */ 272 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, 273 int nb_sectors, BdrvRequestFlags flags); 274 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 275 const char *backing_file); 276 int bdrv_get_backing_file_depth(BlockDriverState *bs); 277 void bdrv_refresh_filename(BlockDriverState *bs); 278 int bdrv_truncate(BlockDriverState *bs, int64_t offset); 279 int64_t bdrv_nb_sectors(BlockDriverState *bs); 280 int64_t bdrv_getlength(BlockDriverState *bs); 281 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); 282 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); 283 void bdrv_refresh_limits(BlockDriverState *bs, Error **errp); 284 int bdrv_commit(BlockDriverState *bs); 285 int bdrv_commit_all(void); 286 int bdrv_change_backing_file(BlockDriverState *bs, 287 const char *backing_file, const char *backing_fmt); 288 void bdrv_register(BlockDriver *bdrv); 289 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, 290 BlockDriverState *base, 291 const char *backing_file_str); 292 BlockDriverState *bdrv_find_overlay(BlockDriverState *active, 293 BlockDriverState *bs); 294 BlockDriverState *bdrv_find_base(BlockDriverState *bs); 295 296 297 typedef struct BdrvCheckResult { 298 int corruptions; 299 int leaks; 300 int check_errors; 301 int corruptions_fixed; 302 int leaks_fixed; 303 int64_t image_end_offset; 304 BlockFragInfo bfi; 305 } BdrvCheckResult; 306 307 typedef enum { 308 BDRV_FIX_LEAKS = 1, 309 BDRV_FIX_ERRORS = 2, 310 } BdrvCheckMode; 311 312 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); 313 314 int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts); 315 316 /* external snapshots */ 317 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, 318 BlockDriverState *candidate); 319 bool bdrv_is_first_non_filter(BlockDriverState *candidate); 320 321 /* check if a named node can be replaced when doing drive-mirror */ 322 BlockDriverState *check_to_replace_node(const char *node_name, Error **errp); 323 324 /* async block I/O */ 325 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, 326 int sector_num); 327 BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, 328 QEMUIOVector *iov, int nb_sectors, 329 BlockDriverCompletionFunc *cb, void *opaque); 330 BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, 331 QEMUIOVector *iov, int nb_sectors, 332 BlockDriverCompletionFunc *cb, void *opaque); 333 BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, 334 BlockDriverCompletionFunc *cb, void *opaque); 335 BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs, 336 int64_t sector_num, int nb_sectors, 337 BlockDriverCompletionFunc *cb, void *opaque); 338 void bdrv_aio_cancel(BlockDriverAIOCB *acb); 339 340 typedef struct BlockRequest { 341 /* Fields to be filled by multiwrite caller */ 342 int64_t sector; 343 int nb_sectors; 344 int flags; 345 QEMUIOVector *qiov; 346 BlockDriverCompletionFunc *cb; 347 void *opaque; 348 349 /* Filled by multiwrite implementation */ 350 int error; 351 } BlockRequest; 352 353 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, 354 int num_reqs); 355 356 /* sg packet commands */ 357 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); 358 BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, 359 unsigned long int req, void *buf, 360 BlockDriverCompletionFunc *cb, void *opaque); 361 362 /* Invalidate any cached metadata used by image formats */ 363 void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp); 364 void bdrv_invalidate_cache_all(Error **errp); 365 366 void bdrv_clear_incoming_migration_all(void); 367 368 /* Ensure contents are flushed to disk. */ 369 int bdrv_flush(BlockDriverState *bs); 370 int coroutine_fn bdrv_co_flush(BlockDriverState *bs); 371 int bdrv_flush_all(void); 372 void bdrv_close_all(void); 373 void bdrv_drain_all(void); 374 375 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 376 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 377 int bdrv_has_zero_init_1(BlockDriverState *bs); 378 int bdrv_has_zero_init(BlockDriverState *bs); 379 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs); 380 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs); 381 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, 382 int nb_sectors, int *pnum); 383 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, 384 int *pnum); 385 int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, 386 int64_t sector_num, int nb_sectors, int *pnum); 387 388 void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error, 389 BlockdevOnError on_write_error); 390 BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read); 391 BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error); 392 void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action, 393 bool is_read, int error); 394 int bdrv_is_read_only(BlockDriverState *bs); 395 int bdrv_is_sg(BlockDriverState *bs); 396 int bdrv_enable_write_cache(BlockDriverState *bs); 397 void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce); 398 int bdrv_is_inserted(BlockDriverState *bs); 399 int bdrv_media_changed(BlockDriverState *bs); 400 void bdrv_lock_medium(BlockDriverState *bs, bool locked); 401 void bdrv_eject(BlockDriverState *bs, bool eject_flag); 402 const char *bdrv_get_format_name(BlockDriverState *bs); 403 BlockDriverState *bdrv_find(const char *name); 404 BlockDriverState *bdrv_find_node(const char *node_name); 405 BlockDeviceInfoList *bdrv_named_nodes_list(void); 406 BlockDriverState *bdrv_lookup_bs(const char *device, 407 const char *node_name, 408 Error **errp); 409 bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base); 410 BlockDriverState *bdrv_next(BlockDriverState *bs); 411 void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), 412 void *opaque); 413 int bdrv_is_encrypted(BlockDriverState *bs); 414 int bdrv_key_required(BlockDriverState *bs); 415 int bdrv_set_key(BlockDriverState *bs, const char *key); 416 int bdrv_query_missing_keys(void); 417 void bdrv_iterate_format(void (*it)(void *opaque, const char *name), 418 void *opaque); 419 const char *bdrv_get_device_name(BlockDriverState *bs); 420 int bdrv_get_flags(BlockDriverState *bs); 421 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, 422 const uint8_t *buf, int nb_sectors); 423 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); 424 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); 425 void bdrv_round_to_clusters(BlockDriverState *bs, 426 int64_t sector_num, int nb_sectors, 427 int64_t *cluster_sector_num, 428 int *cluster_nb_sectors); 429 430 const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 431 void bdrv_get_backing_filename(BlockDriverState *bs, 432 char *filename, int filename_size); 433 void bdrv_get_full_backing_filename(BlockDriverState *bs, 434 char *dest, size_t sz); 435 int bdrv_is_snapshot(BlockDriverState *bs); 436 437 int path_is_absolute(const char *path); 438 void path_combine(char *dest, int dest_size, 439 const char *base_path, 440 const char *filename); 441 442 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); 443 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, 444 int64_t pos, int size); 445 446 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, 447 int64_t pos, int size); 448 449 void bdrv_img_create(const char *filename, const char *fmt, 450 const char *base_filename, const char *base_fmt, 451 char *options, uint64_t img_size, int flags, 452 Error **errp, bool quiet); 453 454 /* Returns the alignment in bytes that is required so that no bounce buffer 455 * is required throughout the stack */ 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_try_blockalign(BlockDriverState *bs, size_t size); 460 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov); 461 462 struct HBitmapIter; 463 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap; 464 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, int granularity, 465 Error **errp); 466 void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 467 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs); 468 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector); 469 void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors); 470 void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors); 471 void bdrv_dirty_iter_init(BlockDriverState *bs, 472 BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi); 473 int64_t bdrv_get_dirty_count(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 474 475 void bdrv_enable_copy_on_read(BlockDriverState *bs); 476 void bdrv_disable_copy_on_read(BlockDriverState *bs); 477 478 void bdrv_ref(BlockDriverState *bs); 479 void bdrv_unref(BlockDriverState *bs); 480 481 bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp); 482 void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason); 483 void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason); 484 void bdrv_op_block_all(BlockDriverState *bs, Error *reason); 485 void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason); 486 bool bdrv_op_blocker_is_empty(BlockDriverState *bs); 487 488 enum BlockAcctType { 489 BDRV_ACCT_READ, 490 BDRV_ACCT_WRITE, 491 BDRV_ACCT_FLUSH, 492 BDRV_MAX_IOTYPE, 493 }; 494 495 typedef struct BlockAcctCookie { 496 int64_t bytes; 497 int64_t start_time_ns; 498 enum BlockAcctType type; 499 } BlockAcctCookie; 500 501 void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie, 502 int64_t bytes, enum BlockAcctType type); 503 void bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie); 504 505 typedef enum { 506 BLKDBG_L1_UPDATE, 507 508 BLKDBG_L1_GROW_ALLOC_TABLE, 509 BLKDBG_L1_GROW_WRITE_TABLE, 510 BLKDBG_L1_GROW_ACTIVATE_TABLE, 511 512 BLKDBG_L2_LOAD, 513 BLKDBG_L2_UPDATE, 514 BLKDBG_L2_UPDATE_COMPRESSED, 515 BLKDBG_L2_ALLOC_COW_READ, 516 BLKDBG_L2_ALLOC_WRITE, 517 518 BLKDBG_READ_AIO, 519 BLKDBG_READ_BACKING_AIO, 520 BLKDBG_READ_COMPRESSED, 521 522 BLKDBG_WRITE_AIO, 523 BLKDBG_WRITE_COMPRESSED, 524 525 BLKDBG_VMSTATE_LOAD, 526 BLKDBG_VMSTATE_SAVE, 527 528 BLKDBG_COW_READ, 529 BLKDBG_COW_WRITE, 530 531 BLKDBG_REFTABLE_LOAD, 532 BLKDBG_REFTABLE_GROW, 533 BLKDBG_REFTABLE_UPDATE, 534 535 BLKDBG_REFBLOCK_LOAD, 536 BLKDBG_REFBLOCK_UPDATE, 537 BLKDBG_REFBLOCK_UPDATE_PART, 538 BLKDBG_REFBLOCK_ALLOC, 539 BLKDBG_REFBLOCK_ALLOC_HOOKUP, 540 BLKDBG_REFBLOCK_ALLOC_WRITE, 541 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, 542 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, 543 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, 544 545 BLKDBG_CLUSTER_ALLOC, 546 BLKDBG_CLUSTER_ALLOC_BYTES, 547 BLKDBG_CLUSTER_FREE, 548 549 BLKDBG_FLUSH_TO_OS, 550 BLKDBG_FLUSH_TO_DISK, 551 552 BLKDBG_PWRITEV_RMW_HEAD, 553 BLKDBG_PWRITEV_RMW_AFTER_HEAD, 554 BLKDBG_PWRITEV_RMW_TAIL, 555 BLKDBG_PWRITEV_RMW_AFTER_TAIL, 556 BLKDBG_PWRITEV, 557 BLKDBG_PWRITEV_ZERO, 558 BLKDBG_PWRITEV_DONE, 559 560 BLKDBG_EVENT_MAX, 561 } BlkDebugEvent; 562 563 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) 564 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); 565 566 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, 567 const char *tag); 568 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag); 569 int bdrv_debug_resume(BlockDriverState *bs, const char *tag); 570 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); 571 572 /** 573 * bdrv_get_aio_context: 574 * 575 * Returns: the currently bound #AioContext 576 */ 577 AioContext *bdrv_get_aio_context(BlockDriverState *bs); 578 579 /** 580 * bdrv_set_aio_context: 581 * 582 * Changes the #AioContext used for fd handlers, timers, and BHs by this 583 * BlockDriverState and all its children. 584 * 585 * This function must be called from the old #AioContext or with a lock held so 586 * the old #AioContext is not executing. 587 */ 588 void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context); 589 590 void bdrv_io_plug(BlockDriverState *bs); 591 void bdrv_io_unplug(BlockDriverState *bs); 592 void bdrv_flush_io_queue(BlockDriverState *bs); 593 594 #endif 595