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 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 } BdrvRequestFlags; 64 65 typedef struct BlockSizes { 66 uint32_t phys; 67 uint32_t log; 68 } BlockSizes; 69 70 typedef struct HDGeometry { 71 uint32_t heads; 72 uint32_t sectors; 73 uint32_t cylinders; 74 } HDGeometry; 75 76 #define BDRV_O_RDWR 0x0002 77 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ 78 #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */ 79 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ 80 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ 81 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ 82 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ 83 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ 84 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ 85 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */ 86 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */ 87 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */ 88 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */ 89 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given: 90 select an appropriate protocol driver, 91 ignoring the format layer */ 92 93 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH) 94 95 96 /* Option names of options parsed by the block layer */ 97 98 #define BDRV_OPT_CACHE_WB "cache.writeback" 99 #define BDRV_OPT_CACHE_DIRECT "cache.direct" 100 #define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush" 101 102 103 #define BDRV_SECTOR_BITS 9 104 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) 105 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) 106 107 #define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \ 108 INT_MAX >> BDRV_SECTOR_BITS) 109 110 /* 111 * Allocation status flags 112 * BDRV_BLOCK_DATA: data is read from bs->file or another file 113 * BDRV_BLOCK_ZERO: sectors read as zero 114 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data 115 * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this 116 * layer (as opposed to the backing file) 117 * BDRV_BLOCK_RAW: used internally to indicate that the request 118 * was answered by the raw driver and that one 119 * should look in bs->file directly. 120 * 121 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in 122 * bs->file where sector data can be read from as raw data. 123 * 124 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present. 125 * 126 * DATA ZERO OFFSET_VALID 127 * t t t sectors read as zero, bs->file is zero at offset 128 * t f t sectors read as valid from bs->file at offset 129 * f t t sectors preallocated, read as zero, bs->file not 130 * necessarily zero at offset 131 * f f t sectors preallocated but read from backing_hd, 132 * bs->file contains garbage at offset 133 * t t f sectors preallocated, read as zero, unknown offset 134 * t f f sectors read from unknown file or offset 135 * f t f not allocated or unknown offset, read as zero 136 * f f f not allocated or unknown offset, read from backing_hd 137 */ 138 #define BDRV_BLOCK_DATA 0x01 139 #define BDRV_BLOCK_ZERO 0x02 140 #define BDRV_BLOCK_OFFSET_VALID 0x04 141 #define BDRV_BLOCK_RAW 0x08 142 #define BDRV_BLOCK_ALLOCATED 0x10 143 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK 144 145 typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue; 146 147 typedef struct BDRVReopenState { 148 BlockDriverState *bs; 149 int flags; 150 QDict *options; 151 void *opaque; 152 } BDRVReopenState; 153 154 /* 155 * Block operation types 156 */ 157 typedef enum BlockOpType { 158 BLOCK_OP_TYPE_BACKUP_SOURCE, 159 BLOCK_OP_TYPE_BACKUP_TARGET, 160 BLOCK_OP_TYPE_CHANGE, 161 BLOCK_OP_TYPE_COMMIT_SOURCE, 162 BLOCK_OP_TYPE_COMMIT_TARGET, 163 BLOCK_OP_TYPE_DATAPLANE, 164 BLOCK_OP_TYPE_DRIVE_DEL, 165 BLOCK_OP_TYPE_EJECT, 166 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, 167 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, 168 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, 169 BLOCK_OP_TYPE_MIRROR, 170 BLOCK_OP_TYPE_RESIZE, 171 BLOCK_OP_TYPE_STREAM, 172 BLOCK_OP_TYPE_REPLACE, 173 BLOCK_OP_TYPE_MAX, 174 } BlockOpType; 175 176 void bdrv_iostatus_enable(BlockDriverState *bs); 177 void bdrv_iostatus_reset(BlockDriverState *bs); 178 void bdrv_iostatus_disable(BlockDriverState *bs); 179 bool bdrv_iostatus_is_enabled(const BlockDriverState *bs); 180 void bdrv_iostatus_set_err(BlockDriverState *bs, int error); 181 void bdrv_info_print(Monitor *mon, const QObject *data); 182 void bdrv_info(Monitor *mon, QObject **ret_data); 183 void bdrv_stats_print(Monitor *mon, const QObject *data); 184 void bdrv_info_stats(Monitor *mon, QObject **ret_data); 185 186 /* disk I/O throttling */ 187 void bdrv_io_limits_enable(BlockDriverState *bs, const char *group); 188 void bdrv_io_limits_disable(BlockDriverState *bs); 189 void bdrv_io_limits_update_group(BlockDriverState *bs, const char *group); 190 191 void bdrv_init(void); 192 void bdrv_init_with_whitelist(void); 193 BlockDriver *bdrv_find_protocol(const char *filename, 194 bool allow_protocol_prefix, 195 Error **errp); 196 BlockDriver *bdrv_find_format(const char *format_name); 197 int bdrv_create(BlockDriver *drv, const char* filename, 198 QemuOpts *opts, Error **errp); 199 int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); 200 BlockDriverState *bdrv_new_root(void); 201 BlockDriverState *bdrv_new(void); 202 void bdrv_make_anon(BlockDriverState *bs); 203 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old); 204 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); 205 int bdrv_parse_cache_flags(const char *mode, int *flags); 206 int bdrv_parse_discard_flags(const char *mode, int *flags); 207 int bdrv_open_image(BlockDriverState **pbs, const char *filename, 208 QDict *options, const char *bdref_key, 209 BlockDriverState* parent, const BdrvChildRole *child_role, 210 bool allow_none, Error **errp); 211 BdrvChild *bdrv_open_child(const char *filename, 212 QDict *options, const char *bdref_key, 213 BlockDriverState* parent, 214 const BdrvChildRole *child_role, 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, Error **errp); 221 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, 222 BlockDriverState *bs, 223 QDict *options, 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_read(BlockDriverState *bs, int64_t sector_num, 233 uint8_t *buf, int nb_sectors); 234 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num, 235 uint8_t *buf, int nb_sectors); 236 int bdrv_write(BlockDriverState *bs, int64_t sector_num, 237 const uint8_t *buf, int nb_sectors); 238 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num, 239 int nb_sectors, BdrvRequestFlags flags); 240 BlockAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num, 241 int nb_sectors, BdrvRequestFlags flags, 242 BlockCompletionFunc *cb, void *opaque); 243 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags); 244 int bdrv_pread(BlockDriverState *bs, int64_t offset, 245 void *buf, int count); 246 int bdrv_pwrite(BlockDriverState *bs, int64_t offset, 247 const void *buf, int count); 248 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov); 249 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, 250 const void *buf, int count); 251 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, 252 int nb_sectors, QEMUIOVector *qiov); 253 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs, 254 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); 255 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, 256 int nb_sectors, QEMUIOVector *qiov); 257 /* 258 * Efficiently zero a region of the disk image. Note that this is a regular 259 * I/O request like read or write and should have a reasonable size. This 260 * function is not suitable for zeroing the entire image in a single request 261 * because it may allocate memory for the entire region. 262 */ 263 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, 264 int nb_sectors, BdrvRequestFlags flags); 265 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 266 const char *backing_file); 267 int bdrv_get_backing_file_depth(BlockDriverState *bs); 268 void bdrv_refresh_filename(BlockDriverState *bs); 269 int bdrv_truncate(BlockDriverState *bs, int64_t offset); 270 int64_t bdrv_nb_sectors(BlockDriverState *bs); 271 int64_t bdrv_getlength(BlockDriverState *bs); 272 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); 273 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); 274 void bdrv_refresh_limits(BlockDriverState *bs, Error **errp); 275 int bdrv_commit(BlockDriverState *bs); 276 int bdrv_commit_all(void); 277 int bdrv_change_backing_file(BlockDriverState *bs, 278 const char *backing_file, const char *backing_fmt); 279 void bdrv_register(BlockDriver *bdrv); 280 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, 281 BlockDriverState *base, 282 const char *backing_file_str); 283 BlockDriverState *bdrv_find_overlay(BlockDriverState *active, 284 BlockDriverState *bs); 285 BlockDriverState *bdrv_find_base(BlockDriverState *bs); 286 287 288 typedef struct BdrvCheckResult { 289 int corruptions; 290 int leaks; 291 int check_errors; 292 int corruptions_fixed; 293 int leaks_fixed; 294 int64_t image_end_offset; 295 BlockFragInfo bfi; 296 } BdrvCheckResult; 297 298 typedef enum { 299 BDRV_FIX_LEAKS = 1, 300 BDRV_FIX_ERRORS = 2, 301 } BdrvCheckMode; 302 303 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); 304 305 /* The units of offset and total_work_size may be chosen arbitrarily by the 306 * block driver; total_work_size may change during the course of the amendment 307 * operation */ 308 typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset, 309 int64_t total_work_size); 310 int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts, 311 BlockDriverAmendStatusCB *status_cb); 312 313 /* external snapshots */ 314 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, 315 BlockDriverState *candidate); 316 bool bdrv_is_first_non_filter(BlockDriverState *candidate); 317 318 /* check if a named node can be replaced when doing drive-mirror */ 319 BlockDriverState *check_to_replace_node(BlockDriverState *parent_bs, 320 const char *node_name, Error **errp); 321 322 /* async block I/O */ 323 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, 324 int sector_num); 325 BlockAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, 326 QEMUIOVector *iov, int nb_sectors, 327 BlockCompletionFunc *cb, void *opaque); 328 BlockAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, 329 QEMUIOVector *iov, int nb_sectors, 330 BlockCompletionFunc *cb, void *opaque); 331 BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs, 332 BlockCompletionFunc *cb, void *opaque); 333 BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs, 334 int64_t sector_num, int nb_sectors, 335 BlockCompletionFunc *cb, void *opaque); 336 void bdrv_aio_cancel(BlockAIOCB *acb); 337 void bdrv_aio_cancel_async(BlockAIOCB *acb); 338 339 typedef struct BlockRequest { 340 /* Fields to be filled by multiwrite caller */ 341 int64_t sector; 342 int nb_sectors; 343 int flags; 344 QEMUIOVector *qiov; 345 BlockCompletionFunc *cb; 346 void *opaque; 347 348 /* Filled by multiwrite implementation */ 349 int error; 350 } BlockRequest; 351 352 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, 353 int num_reqs); 354 355 /* sg packet commands */ 356 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); 357 BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, 358 unsigned long int req, void *buf, 359 BlockCompletionFunc *cb, void *opaque); 360 361 /* Invalidate any cached metadata used by image formats */ 362 void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp); 363 void bdrv_invalidate_cache_all(Error **errp); 364 365 /* Ensure contents are flushed to disk. */ 366 int bdrv_flush(BlockDriverState *bs); 367 int coroutine_fn bdrv_co_flush(BlockDriverState *bs); 368 int bdrv_flush_all(void); 369 void bdrv_close_all(void); 370 void bdrv_drain(BlockDriverState *bs); 371 void bdrv_drain_all(void); 372 373 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 374 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 375 int bdrv_has_zero_init_1(BlockDriverState *bs); 376 int bdrv_has_zero_init(BlockDriverState *bs); 377 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs); 378 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs); 379 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, 380 int nb_sectors, int *pnum); 381 int64_t bdrv_get_block_status_above(BlockDriverState *bs, 382 BlockDriverState *base, 383 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_node(const char *node_name); 406 BlockDeviceInfoList *bdrv_named_nodes_list(Error **errp); 407 BlockDriverState *bdrv_lookup_bs(const char *device, 408 const char *node_name, 409 Error **errp); 410 bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base); 411 BlockDriverState *bdrv_next_node(BlockDriverState *bs); 412 BlockDriverState *bdrv_next(BlockDriverState *bs); 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 void bdrv_add_key(BlockDriverState *bs, const char *key, Error **errp); 417 int bdrv_query_missing_keys(void); 418 void bdrv_iterate_format(void (*it)(void *opaque, const char *name), 419 void *opaque); 420 const char *bdrv_get_node_name(const BlockDriverState *bs); 421 const char *bdrv_get_device_name(const BlockDriverState *bs); 422 const char *bdrv_get_device_or_node_name(const BlockDriverState *bs); 423 int bdrv_get_flags(BlockDriverState *bs); 424 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, 425 const uint8_t *buf, int nb_sectors); 426 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); 427 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); 428 void bdrv_round_to_clusters(BlockDriverState *bs, 429 int64_t sector_num, int nb_sectors, 430 int64_t *cluster_sector_num, 431 int *cluster_nb_sectors); 432 433 const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 434 void bdrv_get_backing_filename(BlockDriverState *bs, 435 char *filename, int filename_size); 436 void bdrv_get_full_backing_filename(BlockDriverState *bs, 437 char *dest, size_t sz, Error **errp); 438 void bdrv_get_full_backing_filename_from_filename(const char *backed, 439 const char *backing, 440 char *dest, size_t sz, 441 Error **errp); 442 int bdrv_is_snapshot(BlockDriverState *bs); 443 444 int path_has_protocol(const char *path); 445 int path_is_absolute(const char *path); 446 void path_combine(char *dest, int dest_size, 447 const char *base_path, 448 const char *filename); 449 450 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); 451 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, 452 int64_t pos, int size); 453 454 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, 455 int64_t pos, int size); 456 457 void bdrv_img_create(const char *filename, const char *fmt, 458 const char *base_filename, const char *base_fmt, 459 char *options, uint64_t img_size, int flags, 460 Error **errp, bool quiet); 461 462 /* Returns the alignment in bytes that is required so that no bounce buffer 463 * is required throughout the stack */ 464 size_t bdrv_min_mem_align(BlockDriverState *bs); 465 /* Returns optimal alignment in bytes for bounce buffer */ 466 size_t bdrv_opt_mem_align(BlockDriverState *bs); 467 void bdrv_set_guest_block_size(BlockDriverState *bs, int align); 468 void *qemu_blockalign(BlockDriverState *bs, size_t size); 469 void *qemu_blockalign0(BlockDriverState *bs, size_t size); 470 void *qemu_try_blockalign(BlockDriverState *bs, size_t size); 471 void *qemu_try_blockalign0(BlockDriverState *bs, size_t size); 472 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov); 473 474 struct HBitmapIter; 475 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap; 476 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, 477 uint32_t granularity, 478 const char *name, 479 Error **errp); 480 int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs, 481 BdrvDirtyBitmap *bitmap, 482 Error **errp); 483 BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs, 484 BdrvDirtyBitmap *bitmap, 485 Error **errp); 486 BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, 487 BdrvDirtyBitmap *bitmap, 488 Error **errp); 489 BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, 490 const char *name); 491 void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap); 492 void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 493 void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap); 494 void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap); 495 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs); 496 uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs); 497 uint32_t bdrv_dirty_bitmap_granularity(BdrvDirtyBitmap *bitmap); 498 bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap); 499 bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap); 500 DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap); 501 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector); 502 void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap, 503 int64_t cur_sector, int nr_sectors); 504 void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap, 505 int64_t cur_sector, int nr_sectors); 506 void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap); 507 void bdrv_dirty_iter_init(BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi); 508 void bdrv_set_dirty_iter(struct HBitmapIter *hbi, int64_t offset); 509 int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap); 510 511 void bdrv_enable_copy_on_read(BlockDriverState *bs); 512 void bdrv_disable_copy_on_read(BlockDriverState *bs); 513 514 void bdrv_ref(BlockDriverState *bs); 515 void bdrv_unref(BlockDriverState *bs); 516 void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child); 517 518 bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp); 519 void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason); 520 void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason); 521 void bdrv_op_block_all(BlockDriverState *bs, Error *reason); 522 void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason); 523 bool bdrv_op_blocker_is_empty(BlockDriverState *bs); 524 525 typedef enum { 526 BLKDBG_L1_UPDATE, 527 528 BLKDBG_L1_GROW_ALLOC_TABLE, 529 BLKDBG_L1_GROW_WRITE_TABLE, 530 BLKDBG_L1_GROW_ACTIVATE_TABLE, 531 532 BLKDBG_L2_LOAD, 533 BLKDBG_L2_UPDATE, 534 BLKDBG_L2_UPDATE_COMPRESSED, 535 BLKDBG_L2_ALLOC_COW_READ, 536 BLKDBG_L2_ALLOC_WRITE, 537 538 BLKDBG_READ_AIO, 539 BLKDBG_READ_BACKING_AIO, 540 BLKDBG_READ_COMPRESSED, 541 542 BLKDBG_WRITE_AIO, 543 BLKDBG_WRITE_COMPRESSED, 544 545 BLKDBG_VMSTATE_LOAD, 546 BLKDBG_VMSTATE_SAVE, 547 548 BLKDBG_COW_READ, 549 BLKDBG_COW_WRITE, 550 551 BLKDBG_REFTABLE_LOAD, 552 BLKDBG_REFTABLE_GROW, 553 BLKDBG_REFTABLE_UPDATE, 554 555 BLKDBG_REFBLOCK_LOAD, 556 BLKDBG_REFBLOCK_UPDATE, 557 BLKDBG_REFBLOCK_UPDATE_PART, 558 BLKDBG_REFBLOCK_ALLOC, 559 BLKDBG_REFBLOCK_ALLOC_HOOKUP, 560 BLKDBG_REFBLOCK_ALLOC_WRITE, 561 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, 562 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, 563 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, 564 565 BLKDBG_CLUSTER_ALLOC, 566 BLKDBG_CLUSTER_ALLOC_BYTES, 567 BLKDBG_CLUSTER_FREE, 568 569 BLKDBG_FLUSH_TO_OS, 570 BLKDBG_FLUSH_TO_DISK, 571 572 BLKDBG_PWRITEV_RMW_HEAD, 573 BLKDBG_PWRITEV_RMW_AFTER_HEAD, 574 BLKDBG_PWRITEV_RMW_TAIL, 575 BLKDBG_PWRITEV_RMW_AFTER_TAIL, 576 BLKDBG_PWRITEV, 577 BLKDBG_PWRITEV_ZERO, 578 BLKDBG_PWRITEV_DONE, 579 580 BLKDBG_EMPTY_IMAGE_PREPARE, 581 582 BLKDBG_EVENT_MAX, 583 } BlkDebugEvent; 584 585 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) 586 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); 587 588 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, 589 const char *tag); 590 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag); 591 int bdrv_debug_resume(BlockDriverState *bs, const char *tag); 592 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); 593 594 /** 595 * bdrv_get_aio_context: 596 * 597 * Returns: the currently bound #AioContext 598 */ 599 AioContext *bdrv_get_aio_context(BlockDriverState *bs); 600 601 /** 602 * bdrv_set_aio_context: 603 * 604 * Changes the #AioContext used for fd handlers, timers, and BHs by this 605 * BlockDriverState and all its children. 606 * 607 * This function must be called with iothread lock held. 608 */ 609 void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context); 610 int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz); 611 int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo); 612 613 void bdrv_io_plug(BlockDriverState *bs); 614 void bdrv_io_unplug(BlockDriverState *bs); 615 void bdrv_flush_io_queue(BlockDriverState *bs); 616 617 BlockAcctStats *bdrv_get_stats(BlockDriverState *bs); 618 619 #endif 620