1ebab2259SFam Zheng /* 2ebab2259SFam Zheng * Block Dirty Bitmap 3ebab2259SFam Zheng * 41b6cc579SEric Blake * Copyright (c) 2016-2017 Red Hat. Inc 5ebab2259SFam Zheng * 6ebab2259SFam Zheng * Permission is hereby granted, free of charge, to any person obtaining a copy 7ebab2259SFam Zheng * of this software and associated documentation files (the "Software"), to deal 8ebab2259SFam Zheng * in the Software without restriction, including without limitation the rights 9ebab2259SFam Zheng * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10ebab2259SFam Zheng * copies of the Software, and to permit persons to whom the Software is 11ebab2259SFam Zheng * furnished to do so, subject to the following conditions: 12ebab2259SFam Zheng * 13ebab2259SFam Zheng * The above copyright notice and this permission notice shall be included in 14ebab2259SFam Zheng * all copies or substantial portions of the Software. 15ebab2259SFam Zheng * 16ebab2259SFam Zheng * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17ebab2259SFam Zheng * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18ebab2259SFam Zheng * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19ebab2259SFam Zheng * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20ebab2259SFam Zheng * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21ebab2259SFam Zheng * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22ebab2259SFam Zheng * THE SOFTWARE. 23ebab2259SFam Zheng */ 24ebab2259SFam Zheng #include "qemu/osdep.h" 25da34e65cSMarkus Armbruster #include "qapi/error.h" 26ebab2259SFam Zheng #include "qemu-common.h" 27ebab2259SFam Zheng #include "trace.h" 28ebab2259SFam Zheng #include "block/block_int.h" 29ebab2259SFam Zheng #include "block/blockjob.h" 30ebab2259SFam Zheng 31ebab2259SFam Zheng /** 32ebab2259SFam Zheng * A BdrvDirtyBitmap can be in three possible states: 33ebab2259SFam Zheng * (1) successor is NULL and disabled is false: full r/w mode 34ebab2259SFam Zheng * (2) successor is NULL and disabled is true: read only mode ("disabled") 35ebab2259SFam Zheng * (3) successor is set: frozen mode. 36ebab2259SFam Zheng * A frozen bitmap cannot be renamed, deleted, anonymized, cleared, set, 37ebab2259SFam Zheng * or enabled. A frozen bitmap can only abdicate() or reclaim(). 38ebab2259SFam Zheng */ 39ebab2259SFam Zheng struct BdrvDirtyBitmap { 40b64bd51eSPaolo Bonzini QemuMutex *mutex; 41ebab2259SFam Zheng HBitmap *bitmap; /* Dirty sector bitmap implementation */ 42fb933437SFam Zheng HBitmap *meta; /* Meta dirty bitmap */ 43ebab2259SFam Zheng BdrvDirtyBitmap *successor; /* Anonymous child; implies frozen status */ 44ebab2259SFam Zheng char *name; /* Optional non-empty unique ID */ 45993e6525SEric Blake int64_t size; /* Size of the bitmap, in bytes */ 468bfc932eSVladimir Sementsov-Ogievskiy bool disabled; /* Bitmap is disabled. It ignores all writes to 478bfc932eSVladimir Sementsov-Ogievskiy the device */ 48dc162c8eSFam Zheng int active_iterators; /* How many iterators are active */ 49d6883bc9SVladimir Sementsov-Ogievskiy bool readonly; /* Bitmap is read-only. This field also 50d6883bc9SVladimir Sementsov-Ogievskiy prevents the respective image from being 51d6883bc9SVladimir Sementsov-Ogievskiy modified (i.e. blocks writes and discards). 52d6883bc9SVladimir Sementsov-Ogievskiy Such operations must fail and both the image 53d6883bc9SVladimir Sementsov-Ogievskiy and this bitmap must remain unchanged while 54d6883bc9SVladimir Sementsov-Ogievskiy this flag is set. */ 55a0319aacSVladimir Sementsov-Ogievskiy bool autoload; /* For persistent bitmaps: bitmap must be 56a0319aacSVladimir Sementsov-Ogievskiy autoloaded on image opening */ 57a88b179fSVladimir Sementsov-Ogievskiy bool persistent; /* bitmap must be saved to owner disk image */ 58ebab2259SFam Zheng QLIST_ENTRY(BdrvDirtyBitmap) list; 59ebab2259SFam Zheng }; 60ebab2259SFam Zheng 61dc162c8eSFam Zheng struct BdrvDirtyBitmapIter { 62dc162c8eSFam Zheng HBitmapIter hbi; 63dc162c8eSFam Zheng BdrvDirtyBitmap *bitmap; 64dc162c8eSFam Zheng }; 65dc162c8eSFam Zheng 662119882cSPaolo Bonzini static inline void bdrv_dirty_bitmaps_lock(BlockDriverState *bs) 672119882cSPaolo Bonzini { 682119882cSPaolo Bonzini qemu_mutex_lock(&bs->dirty_bitmap_mutex); 692119882cSPaolo Bonzini } 702119882cSPaolo Bonzini 712119882cSPaolo Bonzini static inline void bdrv_dirty_bitmaps_unlock(BlockDriverState *bs) 722119882cSPaolo Bonzini { 732119882cSPaolo Bonzini qemu_mutex_unlock(&bs->dirty_bitmap_mutex); 742119882cSPaolo Bonzini } 752119882cSPaolo Bonzini 76b64bd51eSPaolo Bonzini void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap) 77b64bd51eSPaolo Bonzini { 78b64bd51eSPaolo Bonzini qemu_mutex_lock(bitmap->mutex); 79b64bd51eSPaolo Bonzini } 80b64bd51eSPaolo Bonzini 81b64bd51eSPaolo Bonzini void bdrv_dirty_bitmap_unlock(BdrvDirtyBitmap *bitmap) 82b64bd51eSPaolo Bonzini { 83b64bd51eSPaolo Bonzini qemu_mutex_unlock(bitmap->mutex); 84b64bd51eSPaolo Bonzini } 85b64bd51eSPaolo Bonzini 862119882cSPaolo Bonzini /* Called with BQL or dirty_bitmap lock taken. */ 87ebab2259SFam Zheng BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, const char *name) 88ebab2259SFam Zheng { 89ebab2259SFam Zheng BdrvDirtyBitmap *bm; 90ebab2259SFam Zheng 91ebab2259SFam Zheng assert(name); 92ebab2259SFam Zheng QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) { 93ebab2259SFam Zheng if (bm->name && !strcmp(name, bm->name)) { 94ebab2259SFam Zheng return bm; 95ebab2259SFam Zheng } 96ebab2259SFam Zheng } 97ebab2259SFam Zheng return NULL; 98ebab2259SFam Zheng } 99ebab2259SFam Zheng 1002119882cSPaolo Bonzini /* Called with BQL taken. */ 101ebab2259SFam Zheng void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap) 102ebab2259SFam Zheng { 103ebab2259SFam Zheng assert(!bdrv_dirty_bitmap_frozen(bitmap)); 104ebab2259SFam Zheng g_free(bitmap->name); 105ebab2259SFam Zheng bitmap->name = NULL; 106a88b179fSVladimir Sementsov-Ogievskiy bitmap->persistent = false; 107a0319aacSVladimir Sementsov-Ogievskiy bitmap->autoload = false; 108ebab2259SFam Zheng } 109ebab2259SFam Zheng 1102119882cSPaolo Bonzini /* Called with BQL taken. */ 111ebab2259SFam Zheng BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, 112ebab2259SFam Zheng uint32_t granularity, 113ebab2259SFam Zheng const char *name, 114ebab2259SFam Zheng Error **errp) 115ebab2259SFam Zheng { 116ebab2259SFam Zheng int64_t bitmap_size; 117ebab2259SFam Zheng BdrvDirtyBitmap *bitmap; 118ebab2259SFam Zheng 119993e6525SEric Blake assert(is_power_of_2(granularity) && granularity >= BDRV_SECTOR_SIZE); 120ebab2259SFam Zheng 121ebab2259SFam Zheng if (name && bdrv_find_dirty_bitmap(bs, name)) { 122ebab2259SFam Zheng error_setg(errp, "Bitmap already exists: %s", name); 123ebab2259SFam Zheng return NULL; 124ebab2259SFam Zheng } 125993e6525SEric Blake bitmap_size = bdrv_getlength(bs); 126ebab2259SFam Zheng if (bitmap_size < 0) { 127ebab2259SFam Zheng error_setg_errno(errp, -bitmap_size, "could not get length of device"); 128ebab2259SFam Zheng errno = -bitmap_size; 129ebab2259SFam Zheng return NULL; 130ebab2259SFam Zheng } 131ebab2259SFam Zheng bitmap = g_new0(BdrvDirtyBitmap, 1); 132b64bd51eSPaolo Bonzini bitmap->mutex = &bs->dirty_bitmap_mutex; 133993e6525SEric Blake /* 134993e6525SEric Blake * TODO - let hbitmap track full granularity. For now, it is tracking 135993e6525SEric Blake * only sector granularity, as a shortcut for our iterators. 136993e6525SEric Blake */ 137993e6525SEric Blake bitmap->bitmap = hbitmap_alloc(DIV_ROUND_UP(bitmap_size, BDRV_SECTOR_SIZE), 138993e6525SEric Blake ctz32(granularity) - BDRV_SECTOR_BITS); 139ebab2259SFam Zheng bitmap->size = bitmap_size; 140ebab2259SFam Zheng bitmap->name = g_strdup(name); 141ebab2259SFam Zheng bitmap->disabled = false; 1422119882cSPaolo Bonzini bdrv_dirty_bitmaps_lock(bs); 143ebab2259SFam Zheng QLIST_INSERT_HEAD(&bs->dirty_bitmaps, bitmap, list); 1442119882cSPaolo Bonzini bdrv_dirty_bitmaps_unlock(bs); 145ebab2259SFam Zheng return bitmap; 146ebab2259SFam Zheng } 147ebab2259SFam Zheng 148fb933437SFam Zheng /* bdrv_create_meta_dirty_bitmap 149fb933437SFam Zheng * 150fb933437SFam Zheng * Create a meta dirty bitmap that tracks the changes of bits in @bitmap. I.e. 151fb933437SFam Zheng * when a dirty status bit in @bitmap is changed (either from reset to set or 152fb933437SFam Zheng * the other way around), its respective meta dirty bitmap bit will be marked 153fb933437SFam Zheng * dirty as well. 154fb933437SFam Zheng * 155fb933437SFam Zheng * @bitmap: the block dirty bitmap for which to create a meta dirty bitmap. 156fb933437SFam Zheng * @chunk_size: how many bytes of bitmap data does each bit in the meta bitmap 157fb933437SFam Zheng * track. 158fb933437SFam Zheng */ 159fb933437SFam Zheng void bdrv_create_meta_dirty_bitmap(BdrvDirtyBitmap *bitmap, 160fb933437SFam Zheng int chunk_size) 161fb933437SFam Zheng { 162fb933437SFam Zheng assert(!bitmap->meta); 163b64bd51eSPaolo Bonzini qemu_mutex_lock(bitmap->mutex); 164fb933437SFam Zheng bitmap->meta = hbitmap_create_meta(bitmap->bitmap, 165fb933437SFam Zheng chunk_size * BITS_PER_BYTE); 166b64bd51eSPaolo Bonzini qemu_mutex_unlock(bitmap->mutex); 167fb933437SFam Zheng } 168fb933437SFam Zheng 169fb933437SFam Zheng void bdrv_release_meta_dirty_bitmap(BdrvDirtyBitmap *bitmap) 170fb933437SFam Zheng { 171fb933437SFam Zheng assert(bitmap->meta); 172b64bd51eSPaolo Bonzini qemu_mutex_lock(bitmap->mutex); 173fb933437SFam Zheng hbitmap_free_meta(bitmap->bitmap); 174fb933437SFam Zheng bitmap->meta = NULL; 175b64bd51eSPaolo Bonzini qemu_mutex_unlock(bitmap->mutex); 176fb933437SFam Zheng } 177fb933437SFam Zheng 17815891facSFam Zheng int64_t bdrv_dirty_bitmap_size(const BdrvDirtyBitmap *bitmap) 17915891facSFam Zheng { 180993e6525SEric Blake return bitmap->size; 18115891facSFam Zheng } 18215891facSFam Zheng 18315891facSFam Zheng const char *bdrv_dirty_bitmap_name(const BdrvDirtyBitmap *bitmap) 18415891facSFam Zheng { 18515891facSFam Zheng return bitmap->name; 18615891facSFam Zheng } 18715891facSFam Zheng 1882119882cSPaolo Bonzini /* Called with BQL taken. */ 189ebab2259SFam Zheng bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap) 190ebab2259SFam Zheng { 191ebab2259SFam Zheng return bitmap->successor; 192ebab2259SFam Zheng } 193ebab2259SFam Zheng 1942119882cSPaolo Bonzini /* Called with BQL taken. */ 195ebab2259SFam Zheng bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap) 196ebab2259SFam Zheng { 197ebab2259SFam Zheng return !(bitmap->disabled || bitmap->successor); 198ebab2259SFam Zheng } 199ebab2259SFam Zheng 2002119882cSPaolo Bonzini /* Called with BQL taken. */ 201ebab2259SFam Zheng DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap) 202ebab2259SFam Zheng { 203ebab2259SFam Zheng if (bdrv_dirty_bitmap_frozen(bitmap)) { 204ebab2259SFam Zheng return DIRTY_BITMAP_STATUS_FROZEN; 205ebab2259SFam Zheng } else if (!bdrv_dirty_bitmap_enabled(bitmap)) { 206ebab2259SFam Zheng return DIRTY_BITMAP_STATUS_DISABLED; 207ebab2259SFam Zheng } else { 208ebab2259SFam Zheng return DIRTY_BITMAP_STATUS_ACTIVE; 209ebab2259SFam Zheng } 210ebab2259SFam Zheng } 211ebab2259SFam Zheng 212ebab2259SFam Zheng /** 213ebab2259SFam Zheng * Create a successor bitmap destined to replace this bitmap after an operation. 214ebab2259SFam Zheng * Requires that the bitmap is not frozen and has no successor. 2152119882cSPaolo Bonzini * Called with BQL taken. 216ebab2259SFam Zheng */ 217ebab2259SFam Zheng int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs, 218ebab2259SFam Zheng BdrvDirtyBitmap *bitmap, Error **errp) 219ebab2259SFam Zheng { 220ebab2259SFam Zheng uint64_t granularity; 221ebab2259SFam Zheng BdrvDirtyBitmap *child; 222ebab2259SFam Zheng 223ebab2259SFam Zheng if (bdrv_dirty_bitmap_frozen(bitmap)) { 224ebab2259SFam Zheng error_setg(errp, "Cannot create a successor for a bitmap that is " 225ebab2259SFam Zheng "currently frozen"); 226ebab2259SFam Zheng return -1; 227ebab2259SFam Zheng } 228ebab2259SFam Zheng assert(!bitmap->successor); 229ebab2259SFam Zheng 230ebab2259SFam Zheng /* Create an anonymous successor */ 231ebab2259SFam Zheng granularity = bdrv_dirty_bitmap_granularity(bitmap); 232ebab2259SFam Zheng child = bdrv_create_dirty_bitmap(bs, granularity, NULL, errp); 233ebab2259SFam Zheng if (!child) { 234ebab2259SFam Zheng return -1; 235ebab2259SFam Zheng } 236ebab2259SFam Zheng 237ebab2259SFam Zheng /* Successor will be on or off based on our current state. */ 238ebab2259SFam Zheng child->disabled = bitmap->disabled; 239ebab2259SFam Zheng 240ebab2259SFam Zheng /* Install the successor and freeze the parent */ 241ebab2259SFam Zheng bitmap->successor = child; 242ebab2259SFam Zheng return 0; 243ebab2259SFam Zheng } 244ebab2259SFam Zheng 245ebab2259SFam Zheng /** 246ebab2259SFam Zheng * For a bitmap with a successor, yield our name to the successor, 247ebab2259SFam Zheng * delete the old bitmap, and return a handle to the new bitmap. 2482119882cSPaolo Bonzini * Called with BQL taken. 249ebab2259SFam Zheng */ 250ebab2259SFam Zheng BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs, 251ebab2259SFam Zheng BdrvDirtyBitmap *bitmap, 252ebab2259SFam Zheng Error **errp) 253ebab2259SFam Zheng { 254ebab2259SFam Zheng char *name; 255ebab2259SFam Zheng BdrvDirtyBitmap *successor = bitmap->successor; 256ebab2259SFam Zheng 257ebab2259SFam Zheng if (successor == NULL) { 258ebab2259SFam Zheng error_setg(errp, "Cannot relinquish control if " 259ebab2259SFam Zheng "there's no successor present"); 260ebab2259SFam Zheng return NULL; 261ebab2259SFam Zheng } 262ebab2259SFam Zheng 263ebab2259SFam Zheng name = bitmap->name; 264ebab2259SFam Zheng bitmap->name = NULL; 265ebab2259SFam Zheng successor->name = name; 266ebab2259SFam Zheng bitmap->successor = NULL; 267a88b179fSVladimir Sementsov-Ogievskiy successor->persistent = bitmap->persistent; 268a88b179fSVladimir Sementsov-Ogievskiy bitmap->persistent = false; 269a0319aacSVladimir Sementsov-Ogievskiy successor->autoload = bitmap->autoload; 270a0319aacSVladimir Sementsov-Ogievskiy bitmap->autoload = false; 271ebab2259SFam Zheng bdrv_release_dirty_bitmap(bs, bitmap); 272ebab2259SFam Zheng 273ebab2259SFam Zheng return successor; 274ebab2259SFam Zheng } 275ebab2259SFam Zheng 276ebab2259SFam Zheng /** 277ebab2259SFam Zheng * In cases of failure where we can no longer safely delete the parent, 278ebab2259SFam Zheng * we may wish to re-join the parent and child/successor. 279ebab2259SFam Zheng * The merged parent will be un-frozen, but not explicitly re-enabled. 2802119882cSPaolo Bonzini * Called with BQL taken. 281ebab2259SFam Zheng */ 282ebab2259SFam Zheng BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, 283ebab2259SFam Zheng BdrvDirtyBitmap *parent, 284ebab2259SFam Zheng Error **errp) 285ebab2259SFam Zheng { 286ebab2259SFam Zheng BdrvDirtyBitmap *successor = parent->successor; 287ebab2259SFam Zheng 288ebab2259SFam Zheng if (!successor) { 289ebab2259SFam Zheng error_setg(errp, "Cannot reclaim a successor when none is present"); 290ebab2259SFam Zheng return NULL; 291ebab2259SFam Zheng } 292ebab2259SFam Zheng 293ebab2259SFam Zheng if (!hbitmap_merge(parent->bitmap, successor->bitmap)) { 294ebab2259SFam Zheng error_setg(errp, "Merging of parent and successor bitmap failed"); 295ebab2259SFam Zheng return NULL; 296ebab2259SFam Zheng } 297ebab2259SFam Zheng bdrv_release_dirty_bitmap(bs, successor); 298ebab2259SFam Zheng parent->successor = NULL; 299ebab2259SFam Zheng 300ebab2259SFam Zheng return parent; 301ebab2259SFam Zheng } 302ebab2259SFam Zheng 303ebab2259SFam Zheng /** 304ebab2259SFam Zheng * Truncates _all_ bitmaps attached to a BDS. 3052119882cSPaolo Bonzini * Called with BQL taken. 306ebab2259SFam Zheng */ 3071b6cc579SEric Blake void bdrv_dirty_bitmap_truncate(BlockDriverState *bs, int64_t bytes) 308ebab2259SFam Zheng { 309ebab2259SFam Zheng BdrvDirtyBitmap *bitmap; 310ebab2259SFam Zheng 3112119882cSPaolo Bonzini bdrv_dirty_bitmaps_lock(bs); 312ebab2259SFam Zheng QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) { 313ebab2259SFam Zheng assert(!bdrv_dirty_bitmap_frozen(bitmap)); 314dc162c8eSFam Zheng assert(!bitmap->active_iterators); 315993e6525SEric Blake hbitmap_truncate(bitmap->bitmap, DIV_ROUND_UP(bytes, BDRV_SECTOR_SIZE)); 316993e6525SEric Blake bitmap->size = bytes; 317ebab2259SFam Zheng } 3182119882cSPaolo Bonzini bdrv_dirty_bitmaps_unlock(bs); 319ebab2259SFam Zheng } 320ebab2259SFam Zheng 321615b5dcfSVladimir Sementsov-Ogievskiy static bool bdrv_dirty_bitmap_has_name(BdrvDirtyBitmap *bitmap) 322615b5dcfSVladimir Sementsov-Ogievskiy { 323615b5dcfSVladimir Sementsov-Ogievskiy return !!bdrv_dirty_bitmap_name(bitmap); 324615b5dcfSVladimir Sementsov-Ogievskiy } 325615b5dcfSVladimir Sementsov-Ogievskiy 3262119882cSPaolo Bonzini /* Called with BQL taken. */ 327615b5dcfSVladimir Sementsov-Ogievskiy static void bdrv_do_release_matching_dirty_bitmap( 328615b5dcfSVladimir Sementsov-Ogievskiy BlockDriverState *bs, BdrvDirtyBitmap *bitmap, 329615b5dcfSVladimir Sementsov-Ogievskiy bool (*cond)(BdrvDirtyBitmap *bitmap)) 330ebab2259SFam Zheng { 331ebab2259SFam Zheng BdrvDirtyBitmap *bm, *next; 3322119882cSPaolo Bonzini bdrv_dirty_bitmaps_lock(bs); 333ebab2259SFam Zheng QLIST_FOREACH_SAFE(bm, &bs->dirty_bitmaps, list, next) { 334615b5dcfSVladimir Sementsov-Ogievskiy if ((!bitmap || bm == bitmap) && (!cond || cond(bm))) { 335dc162c8eSFam Zheng assert(!bm->active_iterators); 336ebab2259SFam Zheng assert(!bdrv_dirty_bitmap_frozen(bm)); 337fb933437SFam Zheng assert(!bm->meta); 338ebab2259SFam Zheng QLIST_REMOVE(bm, list); 339ebab2259SFam Zheng hbitmap_free(bm->bitmap); 340ebab2259SFam Zheng g_free(bm->name); 341ebab2259SFam Zheng g_free(bm); 342ebab2259SFam Zheng 343ebab2259SFam Zheng if (bitmap) { 3442119882cSPaolo Bonzini goto out; 345ebab2259SFam Zheng } 346ebab2259SFam Zheng } 347ebab2259SFam Zheng } 3487105007aSFam Zheng if (bitmap) { 3497105007aSFam Zheng abort(); 3507105007aSFam Zheng } 3512119882cSPaolo Bonzini 3522119882cSPaolo Bonzini out: 3532119882cSPaolo Bonzini bdrv_dirty_bitmaps_unlock(bs); 354ebab2259SFam Zheng } 355ebab2259SFam Zheng 3562119882cSPaolo Bonzini /* Called with BQL taken. */ 357ebab2259SFam Zheng void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap) 358ebab2259SFam Zheng { 359615b5dcfSVladimir Sementsov-Ogievskiy bdrv_do_release_matching_dirty_bitmap(bs, bitmap, NULL); 360ebab2259SFam Zheng } 361ebab2259SFam Zheng 362ebab2259SFam Zheng /** 363ebab2259SFam Zheng * Release all named dirty bitmaps attached to a BDS (for use in bdrv_close()). 364ebab2259SFam Zheng * There must not be any frozen bitmaps attached. 36556f364e6SVladimir Sementsov-Ogievskiy * This function does not remove persistent bitmaps from the storage. 3662119882cSPaolo Bonzini * Called with BQL taken. 367ebab2259SFam Zheng */ 368ebab2259SFam Zheng void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs) 369ebab2259SFam Zheng { 370615b5dcfSVladimir Sementsov-Ogievskiy bdrv_do_release_matching_dirty_bitmap(bs, NULL, bdrv_dirty_bitmap_has_name); 371615b5dcfSVladimir Sementsov-Ogievskiy } 372615b5dcfSVladimir Sementsov-Ogievskiy 373615b5dcfSVladimir Sementsov-Ogievskiy /** 374615b5dcfSVladimir Sementsov-Ogievskiy * Release all persistent dirty bitmaps attached to a BDS (for use in 375615b5dcfSVladimir Sementsov-Ogievskiy * bdrv_inactivate_recurse()). 376615b5dcfSVladimir Sementsov-Ogievskiy * There must not be any frozen bitmaps attached. 377615b5dcfSVladimir Sementsov-Ogievskiy * This function does not remove persistent bitmaps from the storage. 378615b5dcfSVladimir Sementsov-Ogievskiy */ 379615b5dcfSVladimir Sementsov-Ogievskiy void bdrv_release_persistent_dirty_bitmaps(BlockDriverState *bs) 380615b5dcfSVladimir Sementsov-Ogievskiy { 381615b5dcfSVladimir Sementsov-Ogievskiy bdrv_do_release_matching_dirty_bitmap(bs, NULL, 382615b5dcfSVladimir Sementsov-Ogievskiy bdrv_dirty_bitmap_get_persistance); 383ebab2259SFam Zheng } 384ebab2259SFam Zheng 38556f364e6SVladimir Sementsov-Ogievskiy /** 38656f364e6SVladimir Sementsov-Ogievskiy * Remove persistent dirty bitmap from the storage if it exists. 38756f364e6SVladimir Sementsov-Ogievskiy * Absence of bitmap is not an error, because we have the following scenario: 38856f364e6SVladimir Sementsov-Ogievskiy * BdrvDirtyBitmap can have .persistent = true but not yet saved and have no 38956f364e6SVladimir Sementsov-Ogievskiy * stored version. For such bitmap bdrv_remove_persistent_dirty_bitmap() should 39056f364e6SVladimir Sementsov-Ogievskiy * not fail. 39156f364e6SVladimir Sementsov-Ogievskiy * This function doesn't release corresponding BdrvDirtyBitmap. 39256f364e6SVladimir Sementsov-Ogievskiy */ 39356f364e6SVladimir Sementsov-Ogievskiy void bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs, 39456f364e6SVladimir Sementsov-Ogievskiy const char *name, 39556f364e6SVladimir Sementsov-Ogievskiy Error **errp) 39656f364e6SVladimir Sementsov-Ogievskiy { 39756f364e6SVladimir Sementsov-Ogievskiy if (bs->drv && bs->drv->bdrv_remove_persistent_dirty_bitmap) { 39856f364e6SVladimir Sementsov-Ogievskiy bs->drv->bdrv_remove_persistent_dirty_bitmap(bs, name, errp); 39956f364e6SVladimir Sementsov-Ogievskiy } 40056f364e6SVladimir Sementsov-Ogievskiy } 40156f364e6SVladimir Sementsov-Ogievskiy 4022119882cSPaolo Bonzini /* Called with BQL taken. */ 403ebab2259SFam Zheng void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap) 404ebab2259SFam Zheng { 405ebab2259SFam Zheng assert(!bdrv_dirty_bitmap_frozen(bitmap)); 406ebab2259SFam Zheng bitmap->disabled = true; 407ebab2259SFam Zheng } 408ebab2259SFam Zheng 4092119882cSPaolo Bonzini /* Called with BQL taken. */ 410ebab2259SFam Zheng void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap) 411ebab2259SFam Zheng { 412ebab2259SFam Zheng assert(!bdrv_dirty_bitmap_frozen(bitmap)); 413ebab2259SFam Zheng bitmap->disabled = false; 414ebab2259SFam Zheng } 415ebab2259SFam Zheng 416ebab2259SFam Zheng BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs) 417ebab2259SFam Zheng { 418ebab2259SFam Zheng BdrvDirtyBitmap *bm; 419ebab2259SFam Zheng BlockDirtyInfoList *list = NULL; 420ebab2259SFam Zheng BlockDirtyInfoList **plist = &list; 421ebab2259SFam Zheng 4222119882cSPaolo Bonzini bdrv_dirty_bitmaps_lock(bs); 423ebab2259SFam Zheng QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) { 424ebab2259SFam Zheng BlockDirtyInfo *info = g_new0(BlockDirtyInfo, 1); 425ebab2259SFam Zheng BlockDirtyInfoList *entry = g_new0(BlockDirtyInfoList, 1); 4269a46dba7SEric Blake info->count = bdrv_get_dirty_count(bm); 427ebab2259SFam Zheng info->granularity = bdrv_dirty_bitmap_granularity(bm); 428ebab2259SFam Zheng info->has_name = !!bm->name; 429ebab2259SFam Zheng info->name = g_strdup(bm->name); 430ebab2259SFam Zheng info->status = bdrv_dirty_bitmap_status(bm); 431ebab2259SFam Zheng entry->value = info; 432ebab2259SFam Zheng *plist = entry; 433ebab2259SFam Zheng plist = &entry->next; 434ebab2259SFam Zheng } 4352119882cSPaolo Bonzini bdrv_dirty_bitmaps_unlock(bs); 436ebab2259SFam Zheng 437ebab2259SFam Zheng return list; 438ebab2259SFam Zheng } 439ebab2259SFam Zheng 440b64bd51eSPaolo Bonzini /* Called within bdrv_dirty_bitmap_lock..unlock */ 4413b5d4df0SEric Blake bool bdrv_get_dirty_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, 4423b5d4df0SEric Blake int64_t offset) 443ebab2259SFam Zheng { 444ebab2259SFam Zheng if (bitmap) { 4453b5d4df0SEric Blake return hbitmap_get(bitmap->bitmap, offset >> BDRV_SECTOR_BITS); 446ebab2259SFam Zheng } else { 4473b5d4df0SEric Blake return false; 448ebab2259SFam Zheng } 449ebab2259SFam Zheng } 450ebab2259SFam Zheng 451ebab2259SFam Zheng /** 452ebab2259SFam Zheng * Chooses a default granularity based on the existing cluster size, 453ebab2259SFam Zheng * but clamped between [4K, 64K]. Defaults to 64K in the case that there 454ebab2259SFam Zheng * is no cluster size information available. 455ebab2259SFam Zheng */ 456ebab2259SFam Zheng uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs) 457ebab2259SFam Zheng { 458ebab2259SFam Zheng BlockDriverInfo bdi; 459ebab2259SFam Zheng uint32_t granularity; 460ebab2259SFam Zheng 461ebab2259SFam Zheng if (bdrv_get_info(bs, &bdi) >= 0 && bdi.cluster_size > 0) { 462ebab2259SFam Zheng granularity = MAX(4096, bdi.cluster_size); 463ebab2259SFam Zheng granularity = MIN(65536, granularity); 464ebab2259SFam Zheng } else { 465ebab2259SFam Zheng granularity = 65536; 466ebab2259SFam Zheng } 467ebab2259SFam Zheng 468ebab2259SFam Zheng return granularity; 469ebab2259SFam Zheng } 470ebab2259SFam Zheng 471ba06ff1aSVladimir Sementsov-Ogievskiy uint32_t bdrv_dirty_bitmap_granularity(const BdrvDirtyBitmap *bitmap) 472ebab2259SFam Zheng { 473ebab2259SFam Zheng return BDRV_SECTOR_SIZE << hbitmap_granularity(bitmap->bitmap); 474ebab2259SFam Zheng } 475ebab2259SFam Zheng 476715a74d8SEric Blake BdrvDirtyBitmapIter *bdrv_dirty_iter_new(BdrvDirtyBitmap *bitmap) 477ebab2259SFam Zheng { 478dc162c8eSFam Zheng BdrvDirtyBitmapIter *iter = g_new(BdrvDirtyBitmapIter, 1); 479715a74d8SEric Blake hbitmap_iter_init(&iter->hbi, bitmap->bitmap, 0); 480dc162c8eSFam Zheng iter->bitmap = bitmap; 481dc162c8eSFam Zheng bitmap->active_iterators++; 482dc162c8eSFam Zheng return iter; 483dc162c8eSFam Zheng } 484dc162c8eSFam Zheng 4856d3f4049SFam Zheng BdrvDirtyBitmapIter *bdrv_dirty_meta_iter_new(BdrvDirtyBitmap *bitmap) 4866d3f4049SFam Zheng { 4876d3f4049SFam Zheng BdrvDirtyBitmapIter *iter = g_new(BdrvDirtyBitmapIter, 1); 4886d3f4049SFam Zheng hbitmap_iter_init(&iter->hbi, bitmap->meta, 0); 4896d3f4049SFam Zheng iter->bitmap = bitmap; 4906d3f4049SFam Zheng bitmap->active_iterators++; 4916d3f4049SFam Zheng return iter; 4926d3f4049SFam Zheng } 4936d3f4049SFam Zheng 494dc162c8eSFam Zheng void bdrv_dirty_iter_free(BdrvDirtyBitmapIter *iter) 495dc162c8eSFam Zheng { 496dc162c8eSFam Zheng if (!iter) { 497dc162c8eSFam Zheng return; 498dc162c8eSFam Zheng } 499dc162c8eSFam Zheng assert(iter->bitmap->active_iterators > 0); 500dc162c8eSFam Zheng iter->bitmap->active_iterators--; 501dc162c8eSFam Zheng g_free(iter); 502dc162c8eSFam Zheng } 503dc162c8eSFam Zheng 504dc162c8eSFam Zheng int64_t bdrv_dirty_iter_next(BdrvDirtyBitmapIter *iter) 505dc162c8eSFam Zheng { 506f798184cSEric Blake int64_t ret = hbitmap_iter_next(&iter->hbi); 507f798184cSEric Blake return ret < 0 ? -1 : ret * BDRV_SECTOR_SIZE; 508ebab2259SFam Zheng } 509ebab2259SFam Zheng 510b64bd51eSPaolo Bonzini /* Called within bdrv_dirty_bitmap_lock..unlock */ 511b64bd51eSPaolo Bonzini void bdrv_set_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, 512*e0d7f73eSEric Blake int64_t offset, int64_t bytes) 513ebab2259SFam Zheng { 514*e0d7f73eSEric Blake int64_t end_sector = DIV_ROUND_UP(offset + bytes, BDRV_SECTOR_SIZE); 515*e0d7f73eSEric Blake 516ebab2259SFam Zheng assert(bdrv_dirty_bitmap_enabled(bitmap)); 517d6883bc9SVladimir Sementsov-Ogievskiy assert(!bdrv_dirty_bitmap_readonly(bitmap)); 518*e0d7f73eSEric Blake hbitmap_set(bitmap->bitmap, offset >> BDRV_SECTOR_BITS, 519*e0d7f73eSEric Blake end_sector - (offset >> BDRV_SECTOR_BITS)); 520ebab2259SFam Zheng } 521ebab2259SFam Zheng 522b64bd51eSPaolo Bonzini void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap, 523*e0d7f73eSEric Blake int64_t offset, int64_t bytes) 524b64bd51eSPaolo Bonzini { 525b64bd51eSPaolo Bonzini bdrv_dirty_bitmap_lock(bitmap); 526*e0d7f73eSEric Blake bdrv_set_dirty_bitmap_locked(bitmap, offset, bytes); 527b64bd51eSPaolo Bonzini bdrv_dirty_bitmap_unlock(bitmap); 528b64bd51eSPaolo Bonzini } 529b64bd51eSPaolo Bonzini 530b64bd51eSPaolo Bonzini /* Called within bdrv_dirty_bitmap_lock..unlock */ 531b64bd51eSPaolo Bonzini void bdrv_reset_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, 532*e0d7f73eSEric Blake int64_t offset, int64_t bytes) 533ebab2259SFam Zheng { 534*e0d7f73eSEric Blake int64_t end_sector = DIV_ROUND_UP(offset + bytes, BDRV_SECTOR_SIZE); 535*e0d7f73eSEric Blake 536ebab2259SFam Zheng assert(bdrv_dirty_bitmap_enabled(bitmap)); 537d6883bc9SVladimir Sementsov-Ogievskiy assert(!bdrv_dirty_bitmap_readonly(bitmap)); 538*e0d7f73eSEric Blake hbitmap_reset(bitmap->bitmap, offset >> BDRV_SECTOR_BITS, 539*e0d7f73eSEric Blake end_sector - (offset >> BDRV_SECTOR_BITS)); 540ebab2259SFam Zheng } 541ebab2259SFam Zheng 542b64bd51eSPaolo Bonzini void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap, 543*e0d7f73eSEric Blake int64_t offset, int64_t bytes) 544b64bd51eSPaolo Bonzini { 545b64bd51eSPaolo Bonzini bdrv_dirty_bitmap_lock(bitmap); 546*e0d7f73eSEric Blake bdrv_reset_dirty_bitmap_locked(bitmap, offset, bytes); 547b64bd51eSPaolo Bonzini bdrv_dirty_bitmap_unlock(bitmap); 548b64bd51eSPaolo Bonzini } 549b64bd51eSPaolo Bonzini 550ebab2259SFam Zheng void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out) 551ebab2259SFam Zheng { 552ebab2259SFam Zheng assert(bdrv_dirty_bitmap_enabled(bitmap)); 553d6883bc9SVladimir Sementsov-Ogievskiy assert(!bdrv_dirty_bitmap_readonly(bitmap)); 554b64bd51eSPaolo Bonzini bdrv_dirty_bitmap_lock(bitmap); 555ebab2259SFam Zheng if (!out) { 556ebab2259SFam Zheng hbitmap_reset_all(bitmap->bitmap); 557ebab2259SFam Zheng } else { 558ebab2259SFam Zheng HBitmap *backup = bitmap->bitmap; 559993e6525SEric Blake bitmap->bitmap = hbitmap_alloc(DIV_ROUND_UP(bitmap->size, 560993e6525SEric Blake BDRV_SECTOR_SIZE), 561ebab2259SFam Zheng hbitmap_granularity(backup)); 562ebab2259SFam Zheng *out = backup; 563ebab2259SFam Zheng } 564b64bd51eSPaolo Bonzini bdrv_dirty_bitmap_unlock(bitmap); 565ebab2259SFam Zheng } 566ebab2259SFam Zheng 567ebab2259SFam Zheng void bdrv_undo_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *in) 568ebab2259SFam Zheng { 569ebab2259SFam Zheng HBitmap *tmp = bitmap->bitmap; 570ebab2259SFam Zheng assert(bdrv_dirty_bitmap_enabled(bitmap)); 571d6883bc9SVladimir Sementsov-Ogievskiy assert(!bdrv_dirty_bitmap_readonly(bitmap)); 572ebab2259SFam Zheng bitmap->bitmap = in; 573ebab2259SFam Zheng hbitmap_free(tmp); 574ebab2259SFam Zheng } 575ebab2259SFam Zheng 576882c36f5SVladimir Sementsov-Ogievskiy uint64_t bdrv_dirty_bitmap_serialization_size(const BdrvDirtyBitmap *bitmap, 57786f6ae67SEric Blake uint64_t offset, uint64_t bytes) 578882c36f5SVladimir Sementsov-Ogievskiy { 57986f6ae67SEric Blake assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE)); 58086f6ae67SEric Blake return hbitmap_serialization_size(bitmap->bitmap, 58186f6ae67SEric Blake offset >> BDRV_SECTOR_BITS, 58286f6ae67SEric Blake bytes >> BDRV_SECTOR_BITS); 583882c36f5SVladimir Sementsov-Ogievskiy } 584882c36f5SVladimir Sementsov-Ogievskiy 585882c36f5SVladimir Sementsov-Ogievskiy uint64_t bdrv_dirty_bitmap_serialization_align(const BdrvDirtyBitmap *bitmap) 586882c36f5SVladimir Sementsov-Ogievskiy { 58786f6ae67SEric Blake return hbitmap_serialization_align(bitmap->bitmap) * BDRV_SECTOR_SIZE; 588882c36f5SVladimir Sementsov-Ogievskiy } 589882c36f5SVladimir Sementsov-Ogievskiy 590882c36f5SVladimir Sementsov-Ogievskiy void bdrv_dirty_bitmap_serialize_part(const BdrvDirtyBitmap *bitmap, 59186f6ae67SEric Blake uint8_t *buf, uint64_t offset, 59286f6ae67SEric Blake uint64_t bytes) 593882c36f5SVladimir Sementsov-Ogievskiy { 59486f6ae67SEric Blake assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE)); 59586f6ae67SEric Blake hbitmap_serialize_part(bitmap->bitmap, buf, offset >> BDRV_SECTOR_BITS, 59686f6ae67SEric Blake bytes >> BDRV_SECTOR_BITS); 597882c36f5SVladimir Sementsov-Ogievskiy } 598882c36f5SVladimir Sementsov-Ogievskiy 599882c36f5SVladimir Sementsov-Ogievskiy void bdrv_dirty_bitmap_deserialize_part(BdrvDirtyBitmap *bitmap, 60086f6ae67SEric Blake uint8_t *buf, uint64_t offset, 60186f6ae67SEric Blake uint64_t bytes, bool finish) 602882c36f5SVladimir Sementsov-Ogievskiy { 60386f6ae67SEric Blake assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE)); 60486f6ae67SEric Blake hbitmap_deserialize_part(bitmap->bitmap, buf, offset >> BDRV_SECTOR_BITS, 60586f6ae67SEric Blake bytes >> BDRV_SECTOR_BITS, finish); 606882c36f5SVladimir Sementsov-Ogievskiy } 607882c36f5SVladimir Sementsov-Ogievskiy 608882c36f5SVladimir Sementsov-Ogievskiy void bdrv_dirty_bitmap_deserialize_zeroes(BdrvDirtyBitmap *bitmap, 60986f6ae67SEric Blake uint64_t offset, uint64_t bytes, 610882c36f5SVladimir Sementsov-Ogievskiy bool finish) 611882c36f5SVladimir Sementsov-Ogievskiy { 61286f6ae67SEric Blake assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE)); 61386f6ae67SEric Blake hbitmap_deserialize_zeroes(bitmap->bitmap, offset >> BDRV_SECTOR_BITS, 61486f6ae67SEric Blake bytes >> BDRV_SECTOR_BITS, finish); 615882c36f5SVladimir Sementsov-Ogievskiy } 616882c36f5SVladimir Sementsov-Ogievskiy 6176bdc8b71SVladimir Sementsov-Ogievskiy void bdrv_dirty_bitmap_deserialize_ones(BdrvDirtyBitmap *bitmap, 61886f6ae67SEric Blake uint64_t offset, uint64_t bytes, 6196bdc8b71SVladimir Sementsov-Ogievskiy bool finish) 6206bdc8b71SVladimir Sementsov-Ogievskiy { 62186f6ae67SEric Blake assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE)); 62286f6ae67SEric Blake hbitmap_deserialize_ones(bitmap->bitmap, offset >> BDRV_SECTOR_BITS, 62386f6ae67SEric Blake bytes >> BDRV_SECTOR_BITS, finish); 6246bdc8b71SVladimir Sementsov-Ogievskiy } 6256bdc8b71SVladimir Sementsov-Ogievskiy 626882c36f5SVladimir Sementsov-Ogievskiy void bdrv_dirty_bitmap_deserialize_finish(BdrvDirtyBitmap *bitmap) 627882c36f5SVladimir Sementsov-Ogievskiy { 628882c36f5SVladimir Sementsov-Ogievskiy hbitmap_deserialize_finish(bitmap->bitmap); 629882c36f5SVladimir Sementsov-Ogievskiy } 630882c36f5SVladimir Sementsov-Ogievskiy 631ebab2259SFam Zheng void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, 6326d078599SDenis V. Lunev int64_t nr_sectors) 633ebab2259SFam Zheng { 634ebab2259SFam Zheng BdrvDirtyBitmap *bitmap; 6352119882cSPaolo Bonzini 6362119882cSPaolo Bonzini if (QLIST_EMPTY(&bs->dirty_bitmaps)) { 6372119882cSPaolo Bonzini return; 6382119882cSPaolo Bonzini } 6392119882cSPaolo Bonzini 6402119882cSPaolo Bonzini bdrv_dirty_bitmaps_lock(bs); 641ebab2259SFam Zheng QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) { 642ebab2259SFam Zheng if (!bdrv_dirty_bitmap_enabled(bitmap)) { 643ebab2259SFam Zheng continue; 644ebab2259SFam Zheng } 645d6883bc9SVladimir Sementsov-Ogievskiy assert(!bdrv_dirty_bitmap_readonly(bitmap)); 646ebab2259SFam Zheng hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors); 647ebab2259SFam Zheng } 6482119882cSPaolo Bonzini bdrv_dirty_bitmaps_unlock(bs); 649ebab2259SFam Zheng } 650ebab2259SFam Zheng 651ebab2259SFam Zheng /** 652dc162c8eSFam Zheng * Advance a BdrvDirtyBitmapIter to an arbitrary offset. 653ebab2259SFam Zheng */ 654715a74d8SEric Blake void bdrv_set_dirty_iter(BdrvDirtyBitmapIter *iter, int64_t offset) 655ebab2259SFam Zheng { 656715a74d8SEric Blake hbitmap_iter_init(&iter->hbi, iter->hbi.hb, offset >> BDRV_SECTOR_BITS); 657ebab2259SFam Zheng } 658ebab2259SFam Zheng 659ebab2259SFam Zheng int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap) 660ebab2259SFam Zheng { 6619a46dba7SEric Blake return hbitmap_count(bitmap->bitmap) << BDRV_SECTOR_BITS; 662ebab2259SFam Zheng } 6636d3f4049SFam Zheng 6646d3f4049SFam Zheng int64_t bdrv_get_meta_dirty_count(BdrvDirtyBitmap *bitmap) 6656d3f4049SFam Zheng { 6666d3f4049SFam Zheng return hbitmap_count(bitmap->meta); 6676d3f4049SFam Zheng } 668d6883bc9SVladimir Sementsov-Ogievskiy 669d6883bc9SVladimir Sementsov-Ogievskiy bool bdrv_dirty_bitmap_readonly(const BdrvDirtyBitmap *bitmap) 670d6883bc9SVladimir Sementsov-Ogievskiy { 671d6883bc9SVladimir Sementsov-Ogievskiy return bitmap->readonly; 672d6883bc9SVladimir Sementsov-Ogievskiy } 673d6883bc9SVladimir Sementsov-Ogievskiy 674d6883bc9SVladimir Sementsov-Ogievskiy /* Called with BQL taken. */ 675d6883bc9SVladimir Sementsov-Ogievskiy void bdrv_dirty_bitmap_set_readonly(BdrvDirtyBitmap *bitmap, bool value) 676d6883bc9SVladimir Sementsov-Ogievskiy { 677d6883bc9SVladimir Sementsov-Ogievskiy qemu_mutex_lock(bitmap->mutex); 678d6883bc9SVladimir Sementsov-Ogievskiy bitmap->readonly = value; 679d6883bc9SVladimir Sementsov-Ogievskiy qemu_mutex_unlock(bitmap->mutex); 680d6883bc9SVladimir Sementsov-Ogievskiy } 681d6883bc9SVladimir Sementsov-Ogievskiy 682d6883bc9SVladimir Sementsov-Ogievskiy bool bdrv_has_readonly_bitmaps(BlockDriverState *bs) 683d6883bc9SVladimir Sementsov-Ogievskiy { 684d6883bc9SVladimir Sementsov-Ogievskiy BdrvDirtyBitmap *bm; 685d6883bc9SVladimir Sementsov-Ogievskiy QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) { 686d6883bc9SVladimir Sementsov-Ogievskiy if (bm->readonly) { 687d6883bc9SVladimir Sementsov-Ogievskiy return true; 688d6883bc9SVladimir Sementsov-Ogievskiy } 689d6883bc9SVladimir Sementsov-Ogievskiy } 690d6883bc9SVladimir Sementsov-Ogievskiy 691d6883bc9SVladimir Sementsov-Ogievskiy return false; 692d6883bc9SVladimir Sementsov-Ogievskiy } 693a0319aacSVladimir Sementsov-Ogievskiy 694a0319aacSVladimir Sementsov-Ogievskiy /* Called with BQL taken. */ 695a0319aacSVladimir Sementsov-Ogievskiy void bdrv_dirty_bitmap_set_autoload(BdrvDirtyBitmap *bitmap, bool autoload) 696a0319aacSVladimir Sementsov-Ogievskiy { 697a0319aacSVladimir Sementsov-Ogievskiy qemu_mutex_lock(bitmap->mutex); 698a0319aacSVladimir Sementsov-Ogievskiy bitmap->autoload = autoload; 699a0319aacSVladimir Sementsov-Ogievskiy qemu_mutex_unlock(bitmap->mutex); 700a0319aacSVladimir Sementsov-Ogievskiy } 701a0319aacSVladimir Sementsov-Ogievskiy 702a0319aacSVladimir Sementsov-Ogievskiy bool bdrv_dirty_bitmap_get_autoload(const BdrvDirtyBitmap *bitmap) 703a0319aacSVladimir Sementsov-Ogievskiy { 704a0319aacSVladimir Sementsov-Ogievskiy return bitmap->autoload; 705a0319aacSVladimir Sementsov-Ogievskiy } 706a88b179fSVladimir Sementsov-Ogievskiy 707a88b179fSVladimir Sementsov-Ogievskiy /* Called with BQL taken. */ 708a88b179fSVladimir Sementsov-Ogievskiy void bdrv_dirty_bitmap_set_persistance(BdrvDirtyBitmap *bitmap, bool persistent) 709a88b179fSVladimir Sementsov-Ogievskiy { 710a88b179fSVladimir Sementsov-Ogievskiy qemu_mutex_lock(bitmap->mutex); 711a88b179fSVladimir Sementsov-Ogievskiy bitmap->persistent = persistent; 712a88b179fSVladimir Sementsov-Ogievskiy qemu_mutex_unlock(bitmap->mutex); 713a88b179fSVladimir Sementsov-Ogievskiy } 714a88b179fSVladimir Sementsov-Ogievskiy 715a88b179fSVladimir Sementsov-Ogievskiy bool bdrv_dirty_bitmap_get_persistance(BdrvDirtyBitmap *bitmap) 716a88b179fSVladimir Sementsov-Ogievskiy { 717a88b179fSVladimir Sementsov-Ogievskiy return bitmap->persistent; 718a88b179fSVladimir Sementsov-Ogievskiy } 719a88b179fSVladimir Sementsov-Ogievskiy 720a88b179fSVladimir Sementsov-Ogievskiy bool bdrv_has_changed_persistent_bitmaps(BlockDriverState *bs) 721a88b179fSVladimir Sementsov-Ogievskiy { 722a88b179fSVladimir Sementsov-Ogievskiy BdrvDirtyBitmap *bm; 723a88b179fSVladimir Sementsov-Ogievskiy QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) { 724a88b179fSVladimir Sementsov-Ogievskiy if (bm->persistent && !bm->readonly) { 725a88b179fSVladimir Sementsov-Ogievskiy return true; 726a88b179fSVladimir Sementsov-Ogievskiy } 727a88b179fSVladimir Sementsov-Ogievskiy } 728a88b179fSVladimir Sementsov-Ogievskiy 729a88b179fSVladimir Sementsov-Ogievskiy return false; 730a88b179fSVladimir Sementsov-Ogievskiy } 7313dd10a06SVladimir Sementsov-Ogievskiy 7323dd10a06SVladimir Sementsov-Ogievskiy BdrvDirtyBitmap *bdrv_dirty_bitmap_next(BlockDriverState *bs, 7333dd10a06SVladimir Sementsov-Ogievskiy BdrvDirtyBitmap *bitmap) 7343dd10a06SVladimir Sementsov-Ogievskiy { 7353dd10a06SVladimir Sementsov-Ogievskiy return bitmap == NULL ? QLIST_FIRST(&bs->dirty_bitmaps) : 7363dd10a06SVladimir Sementsov-Ogievskiy QLIST_NEXT(bitmap, list); 7373dd10a06SVladimir Sementsov-Ogievskiy } 738a3b52535SVladimir Sementsov-Ogievskiy 739a3b52535SVladimir Sementsov-Ogievskiy char *bdrv_dirty_bitmap_sha256(const BdrvDirtyBitmap *bitmap, Error **errp) 740a3b52535SVladimir Sementsov-Ogievskiy { 741a3b52535SVladimir Sementsov-Ogievskiy return hbitmap_sha256(bitmap->bitmap, errp); 742a3b52535SVladimir Sementsov-Ogievskiy } 743