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 typedef enum { 52 BDRV_REQ_COPY_ON_READ = 0x1, 53 BDRV_REQ_ZERO_WRITE = 0x2, 54 /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver 55 * is allowed to optimize a write zeroes request by unmapping (discarding) 56 * blocks if it is guaranteed that the result will read back as 57 * zeroes. The flag is only passed to the driver if the block device is 58 * opened with BDRV_O_UNMAP. 59 */ 60 BDRV_REQ_MAY_UNMAP = 0x4, 61 } BdrvRequestFlags; 62 63 #define BDRV_O_RDWR 0x0002 64 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ 65 #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */ 66 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ 67 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ 68 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ 69 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ 70 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ 71 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ 72 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */ 73 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */ 74 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */ 75 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */ 76 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given: 77 select an appropriate protocol driver, 78 ignoring the format layer */ 79 80 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH) 81 82 #define BDRV_SECTOR_BITS 9 83 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) 84 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) 85 86 /* 87 * Allocation status flags 88 * BDRV_BLOCK_DATA: data is read from bs->file or another file 89 * BDRV_BLOCK_ZERO: sectors read as zero 90 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data 91 * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this 92 * layer (as opposed to the backing file) 93 * BDRV_BLOCK_RAW: used internally to indicate that the request 94 * was answered by the raw driver and that one 95 * should look in bs->file directly. 96 * 97 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in 98 * bs->file where sector data can be read from as raw data. 99 * 100 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present. 101 * 102 * DATA ZERO OFFSET_VALID 103 * t t t sectors read as zero, bs->file is zero at offset 104 * t f t sectors read as valid from bs->file at offset 105 * f t t sectors preallocated, read as zero, bs->file not 106 * necessarily zero at offset 107 * f f t sectors preallocated but read from backing_hd, 108 * bs->file contains garbage at offset 109 * t t f sectors preallocated, read as zero, unknown offset 110 * t f f sectors read from unknown file or offset 111 * f t f not allocated or unknown offset, read as zero 112 * f f f not allocated or unknown offset, read from backing_hd 113 */ 114 #define BDRV_BLOCK_DATA 0x01 115 #define BDRV_BLOCK_ZERO 0x02 116 #define BDRV_BLOCK_OFFSET_VALID 0x04 117 #define BDRV_BLOCK_RAW 0x08 118 #define BDRV_BLOCK_ALLOCATED 0x10 119 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK 120 121 typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue; 122 123 typedef struct BDRVReopenState { 124 BlockDriverState *bs; 125 int flags; 126 void *opaque; 127 } BDRVReopenState; 128 129 /* 130 * Block operation types 131 */ 132 typedef enum BlockOpType { 133 BLOCK_OP_TYPE_BACKUP_SOURCE, 134 BLOCK_OP_TYPE_BACKUP_TARGET, 135 BLOCK_OP_TYPE_CHANGE, 136 BLOCK_OP_TYPE_COMMIT, 137 BLOCK_OP_TYPE_DATAPLANE, 138 BLOCK_OP_TYPE_DRIVE_DEL, 139 BLOCK_OP_TYPE_EJECT, 140 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, 141 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, 142 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, 143 BLOCK_OP_TYPE_MIRROR, 144 BLOCK_OP_TYPE_RESIZE, 145 BLOCK_OP_TYPE_STREAM, 146 BLOCK_OP_TYPE_REPLACE, 147 BLOCK_OP_TYPE_MAX, 148 } BlockOpType; 149 150 void bdrv_iostatus_enable(BlockDriverState *bs); 151 void bdrv_iostatus_reset(BlockDriverState *bs); 152 void bdrv_iostatus_disable(BlockDriverState *bs); 153 bool bdrv_iostatus_is_enabled(const BlockDriverState *bs); 154 void bdrv_iostatus_set_err(BlockDriverState *bs, int error); 155 void bdrv_info_print(Monitor *mon, const QObject *data); 156 void bdrv_info(Monitor *mon, QObject **ret_data); 157 void bdrv_stats_print(Monitor *mon, const QObject *data); 158 void bdrv_info_stats(Monitor *mon, QObject **ret_data); 159 160 /* disk I/O throttling */ 161 void bdrv_io_limits_enable(BlockDriverState *bs); 162 void bdrv_io_limits_disable(BlockDriverState *bs); 163 164 void bdrv_init(void); 165 void bdrv_init_with_whitelist(void); 166 BlockDriver *bdrv_find_protocol(const char *filename, 167 bool allow_protocol_prefix); 168 BlockDriver *bdrv_find_format(const char *format_name); 169 BlockDriver *bdrv_find_whitelisted_format(const char *format_name, 170 bool readonly); 171 int bdrv_create(BlockDriver *drv, const char* filename, 172 QemuOpts *opts, Error **errp); 173 int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); 174 BlockDriverState *bdrv_new_root(void); 175 BlockDriverState *bdrv_new(void); 176 void bdrv_make_anon(BlockDriverState *bs); 177 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old); 178 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); 179 int bdrv_parse_cache_flags(const char *mode, int *flags); 180 int bdrv_parse_discard_flags(const char *mode, int *flags); 181 int bdrv_open_image(BlockDriverState **pbs, const char *filename, 182 QDict *options, const char *bdref_key, int flags, 183 bool allow_none, Error **errp); 184 void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd); 185 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp); 186 int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp); 187 int bdrv_open(BlockDriverState **pbs, const char *filename, 188 const char *reference, QDict *options, int flags, 189 BlockDriver *drv, Error **errp); 190 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, 191 BlockDriverState *bs, int flags); 192 int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp); 193 int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp); 194 int bdrv_reopen_prepare(BDRVReopenState *reopen_state, 195 BlockReopenQueue *queue, Error **errp); 196 void bdrv_reopen_commit(BDRVReopenState *reopen_state); 197 void bdrv_reopen_abort(BDRVReopenState *reopen_state); 198 void bdrv_close(BlockDriverState *bs); 199 void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify); 200 int bdrv_read(BlockDriverState *bs, int64_t sector_num, 201 uint8_t *buf, int nb_sectors); 202 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num, 203 uint8_t *buf, int nb_sectors); 204 int bdrv_write(BlockDriverState *bs, int64_t sector_num, 205 const uint8_t *buf, int nb_sectors); 206 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num, 207 int nb_sectors, BdrvRequestFlags flags); 208 BlockAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num, 209 int nb_sectors, BdrvRequestFlags flags, 210 BlockCompletionFunc *cb, void *opaque); 211 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags); 212 int bdrv_pread(BlockDriverState *bs, int64_t offset, 213 void *buf, int count); 214 int bdrv_pwrite(BlockDriverState *bs, int64_t offset, 215 const void *buf, int count); 216 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov); 217 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, 218 const void *buf, int count); 219 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, 220 int nb_sectors, QEMUIOVector *qiov); 221 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs, 222 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); 223 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, 224 int nb_sectors, QEMUIOVector *qiov); 225 /* 226 * Efficiently zero a region of the disk image. Note that this is a regular 227 * I/O request like read or write and should have a reasonable size. This 228 * function is not suitable for zeroing the entire image in a single request 229 * because it may allocate memory for the entire region. 230 */ 231 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, 232 int nb_sectors, BdrvRequestFlags flags); 233 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 234 const char *backing_file); 235 int bdrv_get_backing_file_depth(BlockDriverState *bs); 236 void bdrv_refresh_filename(BlockDriverState *bs); 237 int bdrv_truncate(BlockDriverState *bs, int64_t offset); 238 int64_t bdrv_nb_sectors(BlockDriverState *bs); 239 int64_t bdrv_getlength(BlockDriverState *bs); 240 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); 241 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); 242 void bdrv_refresh_limits(BlockDriverState *bs, Error **errp); 243 int bdrv_commit(BlockDriverState *bs); 244 int bdrv_commit_all(void); 245 int bdrv_change_backing_file(BlockDriverState *bs, 246 const char *backing_file, const char *backing_fmt); 247 void bdrv_register(BlockDriver *bdrv); 248 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, 249 BlockDriverState *base, 250 const char *backing_file_str); 251 BlockDriverState *bdrv_find_overlay(BlockDriverState *active, 252 BlockDriverState *bs); 253 BlockDriverState *bdrv_find_base(BlockDriverState *bs); 254 255 256 typedef struct BdrvCheckResult { 257 int corruptions; 258 int leaks; 259 int check_errors; 260 int corruptions_fixed; 261 int leaks_fixed; 262 int64_t image_end_offset; 263 BlockFragInfo bfi; 264 } BdrvCheckResult; 265 266 typedef enum { 267 BDRV_FIX_LEAKS = 1, 268 BDRV_FIX_ERRORS = 2, 269 } BdrvCheckMode; 270 271 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); 272 273 /* The units of offset and total_work_size may be chosen arbitrarily by the 274 * block driver; total_work_size may change during the course of the amendment 275 * operation */ 276 typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset, 277 int64_t total_work_size); 278 int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts, 279 BlockDriverAmendStatusCB *status_cb); 280 281 /* external snapshots */ 282 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, 283 BlockDriverState *candidate); 284 bool bdrv_is_first_non_filter(BlockDriverState *candidate); 285 286 /* check if a named node can be replaced when doing drive-mirror */ 287 BlockDriverState *check_to_replace_node(const char *node_name, Error **errp); 288 289 /* async block I/O */ 290 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, 291 int sector_num); 292 BlockAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, 293 QEMUIOVector *iov, int nb_sectors, 294 BlockCompletionFunc *cb, void *opaque); 295 BlockAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, 296 QEMUIOVector *iov, int nb_sectors, 297 BlockCompletionFunc *cb, void *opaque); 298 BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs, 299 BlockCompletionFunc *cb, void *opaque); 300 BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs, 301 int64_t sector_num, int nb_sectors, 302 BlockCompletionFunc *cb, void *opaque); 303 void bdrv_aio_cancel(BlockAIOCB *acb); 304 void bdrv_aio_cancel_async(BlockAIOCB *acb); 305 306 typedef struct BlockRequest { 307 /* Fields to be filled by multiwrite caller */ 308 int64_t sector; 309 int nb_sectors; 310 int flags; 311 QEMUIOVector *qiov; 312 BlockCompletionFunc *cb; 313 void *opaque; 314 315 /* Filled by multiwrite implementation */ 316 int error; 317 } BlockRequest; 318 319 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, 320 int num_reqs); 321 322 /* sg packet commands */ 323 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); 324 BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, 325 unsigned long int req, void *buf, 326 BlockCompletionFunc *cb, void *opaque); 327 328 /* Invalidate any cached metadata used by image formats */ 329 void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp); 330 void bdrv_invalidate_cache_all(Error **errp); 331 332 void bdrv_clear_incoming_migration_all(void); 333 334 /* Ensure contents are flushed to disk. */ 335 int bdrv_flush(BlockDriverState *bs); 336 int coroutine_fn bdrv_co_flush(BlockDriverState *bs); 337 int bdrv_flush_all(void); 338 void bdrv_close_all(void); 339 void bdrv_drain(BlockDriverState *bs); 340 void bdrv_drain_all(void); 341 342 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 343 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 344 int bdrv_has_zero_init_1(BlockDriverState *bs); 345 int bdrv_has_zero_init(BlockDriverState *bs); 346 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs); 347 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs); 348 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, 349 int nb_sectors, int *pnum); 350 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, 351 int *pnum); 352 int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, 353 int64_t sector_num, int nb_sectors, int *pnum); 354 355 void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error, 356 BlockdevOnError on_write_error); 357 BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read); 358 BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error); 359 void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action, 360 bool is_read, int error); 361 int bdrv_is_read_only(BlockDriverState *bs); 362 int bdrv_is_sg(BlockDriverState *bs); 363 int bdrv_enable_write_cache(BlockDriverState *bs); 364 void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce); 365 int bdrv_is_inserted(BlockDriverState *bs); 366 int bdrv_media_changed(BlockDriverState *bs); 367 void bdrv_lock_medium(BlockDriverState *bs, bool locked); 368 void bdrv_eject(BlockDriverState *bs, bool eject_flag); 369 const char *bdrv_get_format_name(BlockDriverState *bs); 370 BlockDriverState *bdrv_find(const char *name); 371 BlockDriverState *bdrv_find_node(const char *node_name); 372 BlockDeviceInfoList *bdrv_named_nodes_list(void); 373 BlockDriverState *bdrv_lookup_bs(const char *device, 374 const char *node_name, 375 Error **errp); 376 bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base); 377 BlockDriverState *bdrv_next(BlockDriverState *bs); 378 int bdrv_is_encrypted(BlockDriverState *bs); 379 int bdrv_key_required(BlockDriverState *bs); 380 int bdrv_set_key(BlockDriverState *bs, const char *key); 381 int bdrv_query_missing_keys(void); 382 void bdrv_iterate_format(void (*it)(void *opaque, const char *name), 383 void *opaque); 384 const char *bdrv_get_device_name(const BlockDriverState *bs); 385 int bdrv_get_flags(BlockDriverState *bs); 386 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, 387 const uint8_t *buf, int nb_sectors); 388 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); 389 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); 390 void bdrv_round_to_clusters(BlockDriverState *bs, 391 int64_t sector_num, int nb_sectors, 392 int64_t *cluster_sector_num, 393 int *cluster_nb_sectors); 394 395 const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 396 void bdrv_get_backing_filename(BlockDriverState *bs, 397 char *filename, int filename_size); 398 void bdrv_get_full_backing_filename(BlockDriverState *bs, 399 char *dest, size_t sz); 400 int bdrv_is_snapshot(BlockDriverState *bs); 401 402 int path_is_absolute(const char *path); 403 void path_combine(char *dest, int dest_size, 404 const char *base_path, 405 const char *filename); 406 407 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); 408 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, 409 int64_t pos, int size); 410 411 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, 412 int64_t pos, int size); 413 414 void bdrv_img_create(const char *filename, const char *fmt, 415 const char *base_filename, const char *base_fmt, 416 char *options, uint64_t img_size, int flags, 417 Error **errp, bool quiet); 418 419 /* Returns the alignment in bytes that is required so that no bounce buffer 420 * is required throughout the stack */ 421 size_t bdrv_opt_mem_align(BlockDriverState *bs); 422 void bdrv_set_guest_block_size(BlockDriverState *bs, int align); 423 void *qemu_blockalign(BlockDriverState *bs, size_t size); 424 void *qemu_blockalign0(BlockDriverState *bs, size_t size); 425 void *qemu_try_blockalign(BlockDriverState *bs, size_t size); 426 void *qemu_try_blockalign0(BlockDriverState *bs, size_t size); 427 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov); 428 429 struct HBitmapIter; 430 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap; 431 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, int granularity, 432 Error **errp); 433 void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 434 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs); 435 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector); 436 void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors); 437 void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors); 438 void bdrv_dirty_iter_init(BlockDriverState *bs, 439 BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi); 440 int64_t bdrv_get_dirty_count(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 441 442 void bdrv_enable_copy_on_read(BlockDriverState *bs); 443 void bdrv_disable_copy_on_read(BlockDriverState *bs); 444 445 void bdrv_ref(BlockDriverState *bs); 446 void bdrv_unref(BlockDriverState *bs); 447 448 bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp); 449 void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason); 450 void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason); 451 void bdrv_op_block_all(BlockDriverState *bs, Error *reason); 452 void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason); 453 bool bdrv_op_blocker_is_empty(BlockDriverState *bs); 454 455 typedef enum { 456 BLKDBG_L1_UPDATE, 457 458 BLKDBG_L1_GROW_ALLOC_TABLE, 459 BLKDBG_L1_GROW_WRITE_TABLE, 460 BLKDBG_L1_GROW_ACTIVATE_TABLE, 461 462 BLKDBG_L2_LOAD, 463 BLKDBG_L2_UPDATE, 464 BLKDBG_L2_UPDATE_COMPRESSED, 465 BLKDBG_L2_ALLOC_COW_READ, 466 BLKDBG_L2_ALLOC_WRITE, 467 468 BLKDBG_READ_AIO, 469 BLKDBG_READ_BACKING_AIO, 470 BLKDBG_READ_COMPRESSED, 471 472 BLKDBG_WRITE_AIO, 473 BLKDBG_WRITE_COMPRESSED, 474 475 BLKDBG_VMSTATE_LOAD, 476 BLKDBG_VMSTATE_SAVE, 477 478 BLKDBG_COW_READ, 479 BLKDBG_COW_WRITE, 480 481 BLKDBG_REFTABLE_LOAD, 482 BLKDBG_REFTABLE_GROW, 483 BLKDBG_REFTABLE_UPDATE, 484 485 BLKDBG_REFBLOCK_LOAD, 486 BLKDBG_REFBLOCK_UPDATE, 487 BLKDBG_REFBLOCK_UPDATE_PART, 488 BLKDBG_REFBLOCK_ALLOC, 489 BLKDBG_REFBLOCK_ALLOC_HOOKUP, 490 BLKDBG_REFBLOCK_ALLOC_WRITE, 491 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, 492 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, 493 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, 494 495 BLKDBG_CLUSTER_ALLOC, 496 BLKDBG_CLUSTER_ALLOC_BYTES, 497 BLKDBG_CLUSTER_FREE, 498 499 BLKDBG_FLUSH_TO_OS, 500 BLKDBG_FLUSH_TO_DISK, 501 502 BLKDBG_PWRITEV_RMW_HEAD, 503 BLKDBG_PWRITEV_RMW_AFTER_HEAD, 504 BLKDBG_PWRITEV_RMW_TAIL, 505 BLKDBG_PWRITEV_RMW_AFTER_TAIL, 506 BLKDBG_PWRITEV, 507 BLKDBG_PWRITEV_ZERO, 508 BLKDBG_PWRITEV_DONE, 509 510 BLKDBG_EMPTY_IMAGE_PREPARE, 511 512 BLKDBG_EVENT_MAX, 513 } BlkDebugEvent; 514 515 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) 516 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); 517 518 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, 519 const char *tag); 520 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag); 521 int bdrv_debug_resume(BlockDriverState *bs, const char *tag); 522 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); 523 524 /** 525 * bdrv_get_aio_context: 526 * 527 * Returns: the currently bound #AioContext 528 */ 529 AioContext *bdrv_get_aio_context(BlockDriverState *bs); 530 531 /** 532 * bdrv_set_aio_context: 533 * 534 * Changes the #AioContext used for fd handlers, timers, and BHs by this 535 * BlockDriverState and all its children. 536 * 537 * This function must be called from the old #AioContext or with a lock held so 538 * the old #AioContext is not executing. 539 */ 540 void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context); 541 542 void bdrv_io_plug(BlockDriverState *bs); 543 void bdrv_io_unplug(BlockDriverState *bs); 544 void bdrv_flush_io_queue(BlockDriverState *bs); 545 546 BlockAcctStats *bdrv_get_stats(BlockDriverState *bs); 547 548 #endif 549