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