1019d6b8fSAnthony Liguori /* 2019d6b8fSAnthony Liguori * Block driver for Parallels disk image format 3019d6b8fSAnthony Liguori * 4019d6b8fSAnthony Liguori * Copyright (c) 2007 Alex Beregszaszi 5cc5690f2SDenis V. Lunev * Copyright (c) 2015 Denis V. Lunev <den@openvz.org> 6019d6b8fSAnthony Liguori * 7cc5690f2SDenis V. Lunev * This code was originally based on comparing different disk images created 8cc5690f2SDenis V. Lunev * by Parallels. Currently it is based on opened OpenVZ sources 9cc5690f2SDenis V. Lunev * available at 10cc5690f2SDenis V. Lunev * http://git.openvz.org/?p=ploop;a=summary 11019d6b8fSAnthony Liguori * 12019d6b8fSAnthony Liguori * Permission is hereby granted, free of charge, to any person obtaining a copy 13019d6b8fSAnthony Liguori * of this software and associated documentation files (the "Software"), to deal 14019d6b8fSAnthony Liguori * in the Software without restriction, including without limitation the rights 15019d6b8fSAnthony Liguori * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 16019d6b8fSAnthony Liguori * copies of the Software, and to permit persons to whom the Software is 17019d6b8fSAnthony Liguori * furnished to do so, subject to the following conditions: 18019d6b8fSAnthony Liguori * 19019d6b8fSAnthony Liguori * The above copyright notice and this permission notice shall be included in 20019d6b8fSAnthony Liguori * all copies or substantial portions of the Software. 21019d6b8fSAnthony Liguori * 22019d6b8fSAnthony Liguori * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23019d6b8fSAnthony Liguori * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24019d6b8fSAnthony Liguori * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25019d6b8fSAnthony Liguori * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 26019d6b8fSAnthony Liguori * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 27019d6b8fSAnthony Liguori * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 28019d6b8fSAnthony Liguori * THE SOFTWARE. 29019d6b8fSAnthony Liguori */ 30922a01a0SMarkus Armbruster 3180c71a24SPeter Maydell #include "qemu/osdep.h" 32baefd977SVladimir Sementsov-Ogievskiy #include "qemu/error-report.h" 33da34e65cSMarkus Armbruster #include "qapi/error.h" 34737e150eSPaolo Bonzini #include "block/block_int.h" 35609f45eaSMax Reitz #include "block/qdict.h" 368942764fSKevin Wolf #include "sysemu/block-backend.h" 371de7afc9SPaolo Bonzini #include "qemu/module.h" 38922a01a0SMarkus Armbruster #include "qemu/option.h" 391511b490SKevin Wolf #include "qapi/qmp/qdict.h" 401511b490SKevin Wolf #include "qapi/qobject-input-visitor.h" 411511b490SKevin Wolf #include "qapi/qapi-visit-block-core.h" 4258369e22SPaolo Bonzini #include "qemu/bswap.h" 430d31c7c2SDenis V. Lunev #include "qemu/bitmap.h" 44*5df022cfSPeter Maydell #include "qemu/memalign.h" 451d0f37cfSJeff Cody #include "migration/blocker.h" 4690fe66f0SKlim Kireev #include "parallels.h" 47019d6b8fSAnthony Liguori 48019d6b8fSAnthony Liguori /**************************************************************/ 49019d6b8fSAnthony Liguori 50019d6b8fSAnthony Liguori #define HEADER_MAGIC "WithoutFreeSpace" 51d25d5980SDenis V. Lunev #define HEADER_MAGIC2 "WithouFreSpacExt" 52019d6b8fSAnthony Liguori #define HEADER_VERSION 2 536dd6b9f1SDenis V. Lunev #define HEADER_INUSE_MAGIC (0x746F6E59) 54555a608cSKlim Kireev #define MAX_PARALLELS_IMAGE_FACTOR (1ull << 32) 55019d6b8fSAnthony Liguori 56f7abe0ecSMarc-André Lureau static QEnumLookup prealloc_mode_lookup = { 57f7abe0ecSMarc-André Lureau .array = (const char *const[]) { 58d6179011SDenis V. Lunev "falloc", 59d6179011SDenis V. Lunev "truncate", 60f7abe0ecSMarc-André Lureau }, 61f7abe0ecSMarc-André Lureau .size = PRL_PREALLOC_MODE__MAX 62d6179011SDenis V. Lunev }; 63d6179011SDenis V. Lunev 64d6179011SDenis V. Lunev #define PARALLELS_OPT_PREALLOC_MODE "prealloc-mode" 65d6179011SDenis V. Lunev #define PARALLELS_OPT_PREALLOC_SIZE "prealloc-size" 66d6179011SDenis V. Lunev 67d6179011SDenis V. Lunev static QemuOptsList parallels_runtime_opts = { 68d6179011SDenis V. Lunev .name = "parallels", 69d6179011SDenis V. Lunev .head = QTAILQ_HEAD_INITIALIZER(parallels_runtime_opts.head), 70d6179011SDenis V. Lunev .desc = { 71d6179011SDenis V. Lunev { 72d6179011SDenis V. Lunev .name = PARALLELS_OPT_PREALLOC_SIZE, 73d6179011SDenis V. Lunev .type = QEMU_OPT_SIZE, 74d6179011SDenis V. Lunev .help = "Preallocation size on image expansion", 75ff5bbe56SEdgar Kaziahmedov .def_value_str = "128M", 76d6179011SDenis V. Lunev }, 77d6179011SDenis V. Lunev { 78d6179011SDenis V. Lunev .name = PARALLELS_OPT_PREALLOC_MODE, 79d6179011SDenis V. Lunev .type = QEMU_OPT_STRING, 80d6179011SDenis V. Lunev .help = "Preallocation mode on image expansion " 81d6179011SDenis V. Lunev "(allowed values: falloc, truncate)", 82d6179011SDenis V. Lunev .def_value_str = "falloc", 83d6179011SDenis V. Lunev }, 84d6179011SDenis V. Lunev { /* end of list */ }, 85d6179011SDenis V. Lunev }, 86d6179011SDenis V. Lunev }; 87d6179011SDenis V. Lunev 881511b490SKevin Wolf static QemuOptsList parallels_create_opts = { 891511b490SKevin Wolf .name = "parallels-create-opts", 901511b490SKevin Wolf .head = QTAILQ_HEAD_INITIALIZER(parallels_create_opts.head), 911511b490SKevin Wolf .desc = { 921511b490SKevin Wolf { 931511b490SKevin Wolf .name = BLOCK_OPT_SIZE, 941511b490SKevin Wolf .type = QEMU_OPT_SIZE, 951511b490SKevin Wolf .help = "Virtual disk size", 961511b490SKevin Wolf }, 971511b490SKevin Wolf { 981511b490SKevin Wolf .name = BLOCK_OPT_CLUSTER_SIZE, 991511b490SKevin Wolf .type = QEMU_OPT_SIZE, 1001511b490SKevin Wolf .help = "Parallels image cluster size", 1011511b490SKevin Wolf .def_value_str = stringify(DEFAULT_CLUSTER_SIZE), 1021511b490SKevin Wolf }, 1031511b490SKevin Wolf { /* end of list */ } 1041511b490SKevin Wolf } 1051511b490SKevin Wolf }; 1061511b490SKevin Wolf 107d6179011SDenis V. Lunev 108555cc9d9SDenis V. Lunev static int64_t bat2sect(BDRVParallelsState *s, uint32_t idx) 109555cc9d9SDenis V. Lunev { 110dd97cdc0SDenis V. Lunev return (uint64_t)le32_to_cpu(s->bat_bitmap[idx]) * s->off_multiplier; 111555cc9d9SDenis V. Lunev } 112555cc9d9SDenis V. Lunev 1132d68e22eSDenis V. Lunev static uint32_t bat_entry_off(uint32_t idx) 1142d68e22eSDenis V. Lunev { 1152d68e22eSDenis V. Lunev return sizeof(ParallelsHeader) + sizeof(uint32_t) * idx; 1162d68e22eSDenis V. Lunev } 1172d68e22eSDenis V. Lunev 11829442569SRoman Kagan static int64_t seek_to_sector(BDRVParallelsState *s, int64_t sector_num) 119019d6b8fSAnthony Liguori { 120c34d2451SDavid Woodhouse uint32_t index, offset; 121019d6b8fSAnthony Liguori 122019d6b8fSAnthony Liguori index = sector_num / s->tracks; 123019d6b8fSAnthony Liguori offset = sector_num % s->tracks; 124019d6b8fSAnthony Liguori 1259d8b88f6SChristoph Hellwig /* not allocated */ 126369f7de9SDenis V. Lunev if ((index >= s->bat_size) || (s->bat_bitmap[index] == 0)) { 127019d6b8fSAnthony Liguori return -1; 128369f7de9SDenis V. Lunev } 129555cc9d9SDenis V. Lunev return bat2sect(s, index) + offset; 130019d6b8fSAnthony Liguori } 131019d6b8fSAnthony Liguori 1329de9da17SRoman Kagan static int cluster_remainder(BDRVParallelsState *s, int64_t sector_num, 1339de9da17SRoman Kagan int nb_sectors) 1349de9da17SRoman Kagan { 1359de9da17SRoman Kagan int ret = s->tracks - sector_num % s->tracks; 1369de9da17SRoman Kagan return MIN(nb_sectors, ret); 1379de9da17SRoman Kagan } 1389de9da17SRoman Kagan 1396953d920SDenis V. Lunev static int64_t block_status(BDRVParallelsState *s, int64_t sector_num, 1406953d920SDenis V. Lunev int nb_sectors, int *pnum) 1416953d920SDenis V. Lunev { 1426953d920SDenis V. Lunev int64_t start_off = -2, prev_end_off = -2; 1436953d920SDenis V. Lunev 1446953d920SDenis V. Lunev *pnum = 0; 1456953d920SDenis V. Lunev while (nb_sectors > 0 || start_off == -2) { 1466953d920SDenis V. Lunev int64_t offset = seek_to_sector(s, sector_num); 1476953d920SDenis V. Lunev int to_end; 1486953d920SDenis V. Lunev 1496953d920SDenis V. Lunev if (start_off == -2) { 1506953d920SDenis V. Lunev start_off = offset; 1516953d920SDenis V. Lunev prev_end_off = offset; 1526953d920SDenis V. Lunev } else if (offset != prev_end_off) { 1536953d920SDenis V. Lunev break; 1546953d920SDenis V. Lunev } 1556953d920SDenis V. Lunev 1566953d920SDenis V. Lunev to_end = cluster_remainder(s, sector_num, nb_sectors); 1576953d920SDenis V. Lunev nb_sectors -= to_end; 1586953d920SDenis V. Lunev sector_num += to_end; 1596953d920SDenis V. Lunev *pnum += to_end; 1606953d920SDenis V. Lunev 1616953d920SDenis V. Lunev if (offset > 0) { 1626953d920SDenis V. Lunev prev_end_off += to_end; 1636953d920SDenis V. Lunev } 1646953d920SDenis V. Lunev } 1656953d920SDenis V. Lunev return start_off; 1666953d920SDenis V. Lunev } 1676953d920SDenis V. Lunev 168ddd2ef2cSDenis V. Lunev static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num, 169ddd2ef2cSDenis V. Lunev int nb_sectors, int *pnum) 1705a41e1faSDenis V. Lunev { 171bda4cdcbSEric Blake int ret = 0; 1725a41e1faSDenis V. Lunev BDRVParallelsState *s = bs->opaque; 173d8b83e37SDenis V. Lunev int64_t pos, space, idx, to_allocate, i, len; 174ddd2ef2cSDenis V. Lunev 175ddd2ef2cSDenis V. Lunev pos = block_status(s, sector_num, nb_sectors, pnum); 176ddd2ef2cSDenis V. Lunev if (pos > 0) { 177ddd2ef2cSDenis V. Lunev return pos; 178ddd2ef2cSDenis V. Lunev } 1795a41e1faSDenis V. Lunev 1805a41e1faSDenis V. Lunev idx = sector_num / s->tracks; 181969401feSLaurent Vivier to_allocate = DIV_ROUND_UP(sector_num + *pnum, s->tracks) - idx; 18286d1bd70SMax Reitz 18386d1bd70SMax Reitz /* This function is called only by parallels_co_writev(), which will never 18486d1bd70SMax Reitz * pass a sector_num at or beyond the end of the image (because the block 18586d1bd70SMax Reitz * layer never passes such a sector_num to that function). Therefore, idx 18686d1bd70SMax Reitz * is always below s->bat_size. 18786d1bd70SMax Reitz * block_status() will limit *pnum so that sector_num + *pnum will not 18886d1bd70SMax Reitz * exceed the image end. Therefore, idx + to_allocate cannot exceed 18986d1bd70SMax Reitz * s->bat_size. 19086d1bd70SMax Reitz * Note that s->bat_size is an unsigned int, therefore idx + to_allocate 19186d1bd70SMax Reitz * will always fit into a uint32_t. */ 19286d1bd70SMax Reitz assert(idx < s->bat_size && idx + to_allocate <= s->bat_size); 19386d1bd70SMax Reitz 194ddd2ef2cSDenis V. Lunev space = to_allocate * s->tracks; 195d8b83e37SDenis V. Lunev len = bdrv_getlength(bs->file->bs); 196d8b83e37SDenis V. Lunev if (len < 0) { 197d8b83e37SDenis V. Lunev return len; 198d8b83e37SDenis V. Lunev } 199d8b83e37SDenis V. Lunev if (s->data_end + space > (len >> BDRV_SECTOR_BITS)) { 200ddd2ef2cSDenis V. Lunev space += s->prealloc_size; 201bda4cdcbSEric Blake /* 202bda4cdcbSEric Blake * We require the expanded size to read back as zero. If the 203bda4cdcbSEric Blake * user permitted truncation, we try that; but if it fails, we 204bda4cdcbSEric Blake * force the safer-but-slower fallocate. 205bda4cdcbSEric Blake */ 206bda4cdcbSEric Blake if (s->prealloc_mode == PRL_PREALLOC_MODE_TRUNCATE) { 207bda4cdcbSEric Blake ret = bdrv_truncate(bs->file, 208bda4cdcbSEric Blake (s->data_end + space) << BDRV_SECTOR_BITS, 209bda4cdcbSEric Blake false, PREALLOC_MODE_OFF, BDRV_REQ_ZERO_WRITE, 210bda4cdcbSEric Blake NULL); 211bda4cdcbSEric Blake if (ret == -ENOTSUP) { 212bda4cdcbSEric Blake s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE; 213bda4cdcbSEric Blake } 214bda4cdcbSEric Blake } 21519f5dc15SDenis V. Lunev if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) { 216720ff280SKevin Wolf ret = bdrv_pwrite_zeroes(bs->file, 21774021bc4SEric Blake s->data_end << BDRV_SECTOR_BITS, 21874021bc4SEric Blake space << BDRV_SECTOR_BITS, 0); 2195a41e1faSDenis V. Lunev } 2205a41e1faSDenis V. Lunev if (ret < 0) { 2215a41e1faSDenis V. Lunev return ret; 2225a41e1faSDenis V. Lunev } 22319f5dc15SDenis V. Lunev } 224ddd2ef2cSDenis V. Lunev 225bcbb3866SEdgar Kaziakhmedov /* Try to read from backing to fill empty clusters 226bcbb3866SEdgar Kaziakhmedov * FIXME: 1. previous write_zeroes may be redundant 227bcbb3866SEdgar Kaziakhmedov * 2. most of data we read from backing will be rewritten by 228bcbb3866SEdgar Kaziakhmedov * parallels_co_writev. On aligned-to-cluster write we do not need 229bcbb3866SEdgar Kaziakhmedov * this read at all. 230bcbb3866SEdgar Kaziakhmedov * 3. it would be good to combine write of data from backing and new 231bcbb3866SEdgar Kaziakhmedov * data into one write call */ 232bcbb3866SEdgar Kaziakhmedov if (bs->backing) { 233bcbb3866SEdgar Kaziakhmedov int64_t nb_cow_sectors = to_allocate * s->tracks; 234bcbb3866SEdgar Kaziakhmedov int64_t nb_cow_bytes = nb_cow_sectors << BDRV_SECTOR_BITS; 235a4072543SVladimir Sementsov-Ogievskiy void *buf = qemu_blockalign(bs, nb_cow_bytes); 236bcbb3866SEdgar Kaziakhmedov 237a4072543SVladimir Sementsov-Ogievskiy ret = bdrv_co_pread(bs->backing, idx * s->tracks * BDRV_SECTOR_SIZE, 238a4072543SVladimir Sementsov-Ogievskiy nb_cow_bytes, buf, 0); 239bcbb3866SEdgar Kaziakhmedov if (ret < 0) { 240a4072543SVladimir Sementsov-Ogievskiy qemu_vfree(buf); 241bcbb3866SEdgar Kaziakhmedov return ret; 242bcbb3866SEdgar Kaziakhmedov } 243bcbb3866SEdgar Kaziakhmedov 244d08c2a24SEric Blake ret = bdrv_co_pwritev(bs->file, s->data_end * BDRV_SECTOR_SIZE, 245a4072543SVladimir Sementsov-Ogievskiy nb_cow_bytes, buf, 0); 246a4072543SVladimir Sementsov-Ogievskiy qemu_vfree(buf); 247bcbb3866SEdgar Kaziakhmedov if (ret < 0) { 248bcbb3866SEdgar Kaziakhmedov return ret; 249bcbb3866SEdgar Kaziakhmedov } 250bcbb3866SEdgar Kaziakhmedov } 251bcbb3866SEdgar Kaziakhmedov 252ddd2ef2cSDenis V. Lunev for (i = 0; i < to_allocate; i++) { 253ddd2ef2cSDenis V. Lunev s->bat_bitmap[idx + i] = cpu_to_le32(s->data_end / s->off_multiplier); 25419f5dc15SDenis V. Lunev s->data_end += s->tracks; 255ddd2ef2cSDenis V. Lunev bitmap_set(s->bat_dirty_bmap, 256c9f6856dSVladimir Sementsov-Ogievskiy bat_entry_off(idx + i) / s->bat_dirty_block, 1); 257ddd2ef2cSDenis V. Lunev } 2585a41e1faSDenis V. Lunev 259ddd2ef2cSDenis V. Lunev return bat2sect(s, idx) + sector_num % s->tracks; 2605a41e1faSDenis V. Lunev } 2615a41e1faSDenis V. Lunev 2620d31c7c2SDenis V. Lunev 2630d31c7c2SDenis V. Lunev static coroutine_fn int parallels_co_flush_to_os(BlockDriverState *bs) 2640d31c7c2SDenis V. Lunev { 2650d31c7c2SDenis V. Lunev BDRVParallelsState *s = bs->opaque; 2660d31c7c2SDenis V. Lunev unsigned long size = DIV_ROUND_UP(s->header_size, s->bat_dirty_block); 2670d31c7c2SDenis V. Lunev unsigned long bit; 2680d31c7c2SDenis V. Lunev 2690d31c7c2SDenis V. Lunev qemu_co_mutex_lock(&s->lock); 2700d31c7c2SDenis V. Lunev 2710d31c7c2SDenis V. Lunev bit = find_first_bit(s->bat_dirty_bmap, size); 2720d31c7c2SDenis V. Lunev while (bit < size) { 2730d31c7c2SDenis V. Lunev uint32_t off = bit * s->bat_dirty_block; 2740d31c7c2SDenis V. Lunev uint32_t to_write = s->bat_dirty_block; 2750d31c7c2SDenis V. Lunev int ret; 2760d31c7c2SDenis V. Lunev 2770d31c7c2SDenis V. Lunev if (off + to_write > s->header_size) { 2780d31c7c2SDenis V. Lunev to_write = s->header_size - off; 2790d31c7c2SDenis V. Lunev } 280d9ca2ea2SKevin Wolf ret = bdrv_pwrite(bs->file, off, (uint8_t *)s->header + off, 2819a4f4c31SKevin Wolf to_write); 2820d31c7c2SDenis V. Lunev if (ret < 0) { 2830d31c7c2SDenis V. Lunev qemu_co_mutex_unlock(&s->lock); 2840d31c7c2SDenis V. Lunev return ret; 2850d31c7c2SDenis V. Lunev } 2860d31c7c2SDenis V. Lunev bit = find_next_bit(s->bat_dirty_bmap, size, bit + 1); 2870d31c7c2SDenis V. Lunev } 2880d31c7c2SDenis V. Lunev bitmap_zero(s->bat_dirty_bmap, size); 2890d31c7c2SDenis V. Lunev 2900d31c7c2SDenis V. Lunev qemu_co_mutex_unlock(&s->lock); 2910d31c7c2SDenis V. Lunev return 0; 2920d31c7c2SDenis V. Lunev } 2930d31c7c2SDenis V. Lunev 2940d31c7c2SDenis V. Lunev 2958e0cf59dSEric Blake static int coroutine_fn parallels_co_block_status(BlockDriverState *bs, 2968e0cf59dSEric Blake bool want_zero, 2978e0cf59dSEric Blake int64_t offset, 2988e0cf59dSEric Blake int64_t bytes, 2998e0cf59dSEric Blake int64_t *pnum, 3008e0cf59dSEric Blake int64_t *map, 3018e0cf59dSEric Blake BlockDriverState **file) 302dd3bed16SRoman Kagan { 303dd3bed16SRoman Kagan BDRVParallelsState *s = bs->opaque; 3048e0cf59dSEric Blake int count; 305dd3bed16SRoman Kagan 3068e0cf59dSEric Blake assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE)); 307dd3bed16SRoman Kagan qemu_co_mutex_lock(&s->lock); 3088e0cf59dSEric Blake offset = block_status(s, offset >> BDRV_SECTOR_BITS, 3098e0cf59dSEric Blake bytes >> BDRV_SECTOR_BITS, &count); 310dd3bed16SRoman Kagan qemu_co_mutex_unlock(&s->lock); 311dd3bed16SRoman Kagan 3128e0cf59dSEric Blake *pnum = count * BDRV_SECTOR_SIZE; 313dd3bed16SRoman Kagan if (offset < 0) { 314dd3bed16SRoman Kagan return 0; 315dd3bed16SRoman Kagan } 316dd3bed16SRoman Kagan 3178e0cf59dSEric Blake *map = offset * BDRV_SECTOR_SIZE; 318ddf4987dSFam Zheng *file = bs->file->bs; 3198e0cf59dSEric Blake return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; 320dd3bed16SRoman Kagan } 321dd3bed16SRoman Kagan 3225a41e1faSDenis V. Lunev static coroutine_fn int parallels_co_writev(BlockDriverState *bs, 323e18a58b4SEric Blake int64_t sector_num, int nb_sectors, 324e18a58b4SEric Blake QEMUIOVector *qiov, int flags) 3255a41e1faSDenis V. Lunev { 3265a41e1faSDenis V. Lunev BDRVParallelsState *s = bs->opaque; 3275a41e1faSDenis V. Lunev uint64_t bytes_done = 0; 3285a41e1faSDenis V. Lunev QEMUIOVector hd_qiov; 3295a41e1faSDenis V. Lunev int ret = 0; 3305a41e1faSDenis V. Lunev 331e18a58b4SEric Blake assert(!flags); 3325a41e1faSDenis V. Lunev qemu_iovec_init(&hd_qiov, qiov->niov); 3335a41e1faSDenis V. Lunev 3345a41e1faSDenis V. Lunev while (nb_sectors > 0) { 3355a41e1faSDenis V. Lunev int64_t position; 3365a41e1faSDenis V. Lunev int n, nbytes; 3375a41e1faSDenis V. Lunev 3385a41e1faSDenis V. Lunev qemu_co_mutex_lock(&s->lock); 339ddd2ef2cSDenis V. Lunev position = allocate_clusters(bs, sector_num, nb_sectors, &n); 3405a41e1faSDenis V. Lunev qemu_co_mutex_unlock(&s->lock); 3415a41e1faSDenis V. Lunev if (position < 0) { 3425a41e1faSDenis V. Lunev ret = (int)position; 3435a41e1faSDenis V. Lunev break; 3445a41e1faSDenis V. Lunev } 3455a41e1faSDenis V. Lunev 3465a41e1faSDenis V. Lunev nbytes = n << BDRV_SECTOR_BITS; 3475a41e1faSDenis V. Lunev 3485a41e1faSDenis V. Lunev qemu_iovec_reset(&hd_qiov); 3495a41e1faSDenis V. Lunev qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); 3505a41e1faSDenis V. Lunev 351d08c2a24SEric Blake ret = bdrv_co_pwritev(bs->file, position * BDRV_SECTOR_SIZE, nbytes, 352d08c2a24SEric Blake &hd_qiov, 0); 3535a41e1faSDenis V. Lunev if (ret < 0) { 3545a41e1faSDenis V. Lunev break; 3555a41e1faSDenis V. Lunev } 3565a41e1faSDenis V. Lunev 3575a41e1faSDenis V. Lunev nb_sectors -= n; 3585a41e1faSDenis V. Lunev sector_num += n; 3595a41e1faSDenis V. Lunev bytes_done += nbytes; 3605a41e1faSDenis V. Lunev } 3615a41e1faSDenis V. Lunev 3625a41e1faSDenis V. Lunev qemu_iovec_destroy(&hd_qiov); 3635a41e1faSDenis V. Lunev return ret; 3645a41e1faSDenis V. Lunev } 3655a41e1faSDenis V. Lunev 366481fb9cfSDenis V. Lunev static coroutine_fn int parallels_co_readv(BlockDriverState *bs, 367481fb9cfSDenis V. Lunev int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) 368019d6b8fSAnthony Liguori { 36929442569SRoman Kagan BDRVParallelsState *s = bs->opaque; 370481fb9cfSDenis V. Lunev uint64_t bytes_done = 0; 371481fb9cfSDenis V. Lunev QEMUIOVector hd_qiov; 372481fb9cfSDenis V. Lunev int ret = 0; 373481fb9cfSDenis V. Lunev 374481fb9cfSDenis V. Lunev qemu_iovec_init(&hd_qiov, qiov->niov); 37529442569SRoman Kagan 376019d6b8fSAnthony Liguori while (nb_sectors > 0) { 377481fb9cfSDenis V. Lunev int64_t position; 378481fb9cfSDenis V. Lunev int n, nbytes; 379481fb9cfSDenis V. Lunev 380481fb9cfSDenis V. Lunev qemu_co_mutex_lock(&s->lock); 3816953d920SDenis V. Lunev position = block_status(s, sector_num, nb_sectors, &n); 382481fb9cfSDenis V. Lunev qemu_co_mutex_unlock(&s->lock); 383481fb9cfSDenis V. Lunev 384481fb9cfSDenis V. Lunev nbytes = n << BDRV_SECTOR_BITS; 385481fb9cfSDenis V. Lunev 386481fb9cfSDenis V. Lunev qemu_iovec_reset(&hd_qiov); 387481fb9cfSDenis V. Lunev qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); 388481fb9cfSDenis V. Lunev 389bcbb3866SEdgar Kaziakhmedov if (position < 0) { 390bcbb3866SEdgar Kaziakhmedov if (bs->backing) { 391d08c2a24SEric Blake ret = bdrv_co_preadv(bs->backing, sector_num * BDRV_SECTOR_SIZE, 392d08c2a24SEric Blake nbytes, &hd_qiov, 0); 393bcbb3866SEdgar Kaziakhmedov if (ret < 0) { 394bcbb3866SEdgar Kaziakhmedov break; 395bcbb3866SEdgar Kaziakhmedov } 396bcbb3866SEdgar Kaziakhmedov } else { 397bcbb3866SEdgar Kaziakhmedov qemu_iovec_memset(&hd_qiov, 0, 0, nbytes); 398bcbb3866SEdgar Kaziakhmedov } 399bcbb3866SEdgar Kaziakhmedov } else { 400d08c2a24SEric Blake ret = bdrv_co_preadv(bs->file, position * BDRV_SECTOR_SIZE, nbytes, 401d08c2a24SEric Blake &hd_qiov, 0); 402481fb9cfSDenis V. Lunev if (ret < 0) { 403481fb9cfSDenis V. Lunev break; 4049d8b88f6SChristoph Hellwig } 405019d6b8fSAnthony Liguori } 406019d6b8fSAnthony Liguori 407481fb9cfSDenis V. Lunev nb_sectors -= n; 408481fb9cfSDenis V. Lunev sector_num += n; 409481fb9cfSDenis V. Lunev bytes_done += nbytes; 410481fb9cfSDenis V. Lunev } 411481fb9cfSDenis V. Lunev 412481fb9cfSDenis V. Lunev qemu_iovec_destroy(&hd_qiov); 4132914caa0SPaolo Bonzini return ret; 4142914caa0SPaolo Bonzini } 4152914caa0SPaolo Bonzini 41649ad6467SDenis V. Lunev 4172fd61638SPaolo Bonzini static int coroutine_fn parallels_co_check(BlockDriverState *bs, 4182fd61638SPaolo Bonzini BdrvCheckResult *res, 41949ad6467SDenis V. Lunev BdrvCheckMode fix) 42049ad6467SDenis V. Lunev { 42149ad6467SDenis V. Lunev BDRVParallelsState *s = bs->opaque; 42249ad6467SDenis V. Lunev int64_t size, prev_off, high_off; 42349ad6467SDenis V. Lunev int ret; 42449ad6467SDenis V. Lunev uint32_t i; 42549ad6467SDenis V. Lunev bool flush_bat = false; 42649ad6467SDenis V. Lunev 4279a4f4c31SKevin Wolf size = bdrv_getlength(bs->file->bs); 42849ad6467SDenis V. Lunev if (size < 0) { 42949ad6467SDenis V. Lunev res->check_errors++; 43049ad6467SDenis V. Lunev return size; 43149ad6467SDenis V. Lunev } 43249ad6467SDenis V. Lunev 4332fd61638SPaolo Bonzini qemu_co_mutex_lock(&s->lock); 4346dd6b9f1SDenis V. Lunev if (s->header_unclean) { 4356dd6b9f1SDenis V. Lunev fprintf(stderr, "%s image was not closed correctly\n", 4366dd6b9f1SDenis V. Lunev fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR"); 4376dd6b9f1SDenis V. Lunev res->corruptions++; 4386dd6b9f1SDenis V. Lunev if (fix & BDRV_FIX_ERRORS) { 4396dd6b9f1SDenis V. Lunev /* parallels_close will do the job right */ 4406dd6b9f1SDenis V. Lunev res->corruptions_fixed++; 4416dd6b9f1SDenis V. Lunev s->header_unclean = false; 4426dd6b9f1SDenis V. Lunev } 4436dd6b9f1SDenis V. Lunev } 4446dd6b9f1SDenis V. Lunev 44549ad6467SDenis V. Lunev res->bfi.total_clusters = s->bat_size; 44649ad6467SDenis V. Lunev res->bfi.compressed_clusters = 0; /* compression is not supported */ 44749ad6467SDenis V. Lunev 44849ad6467SDenis V. Lunev high_off = 0; 44949ad6467SDenis V. Lunev prev_off = 0; 45049ad6467SDenis V. Lunev for (i = 0; i < s->bat_size; i++) { 45149ad6467SDenis V. Lunev int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS; 45249ad6467SDenis V. Lunev if (off == 0) { 45349ad6467SDenis V. Lunev prev_off = 0; 45449ad6467SDenis V. Lunev continue; 45549ad6467SDenis V. Lunev } 45649ad6467SDenis V. Lunev 45749ad6467SDenis V. Lunev /* cluster outside the image */ 45849ad6467SDenis V. Lunev if (off > size) { 45949ad6467SDenis V. Lunev fprintf(stderr, "%s cluster %u is outside image\n", 46049ad6467SDenis V. Lunev fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i); 46149ad6467SDenis V. Lunev res->corruptions++; 46249ad6467SDenis V. Lunev if (fix & BDRV_FIX_ERRORS) { 46349ad6467SDenis V. Lunev prev_off = 0; 46449ad6467SDenis V. Lunev s->bat_bitmap[i] = 0; 46549ad6467SDenis V. Lunev res->corruptions_fixed++; 46649ad6467SDenis V. Lunev flush_bat = true; 46749ad6467SDenis V. Lunev continue; 46849ad6467SDenis V. Lunev } 46949ad6467SDenis V. Lunev } 47049ad6467SDenis V. Lunev 47149ad6467SDenis V. Lunev res->bfi.allocated_clusters++; 47249ad6467SDenis V. Lunev if (off > high_off) { 47349ad6467SDenis V. Lunev high_off = off; 47449ad6467SDenis V. Lunev } 47549ad6467SDenis V. Lunev 476e0b5207fSVladimir Sementsov-Ogievskiy if (prev_off != 0 && (prev_off + s->cluster_size) != off) { 47749ad6467SDenis V. Lunev res->bfi.fragmented_clusters++; 47849ad6467SDenis V. Lunev } 47949ad6467SDenis V. Lunev prev_off = off; 48049ad6467SDenis V. Lunev } 48149ad6467SDenis V. Lunev 4822fd61638SPaolo Bonzini ret = 0; 48349ad6467SDenis V. Lunev if (flush_bat) { 484d9ca2ea2SKevin Wolf ret = bdrv_pwrite_sync(bs->file, 0, s->header, s->header_size); 48549ad6467SDenis V. Lunev if (ret < 0) { 48649ad6467SDenis V. Lunev res->check_errors++; 4872fd61638SPaolo Bonzini goto out; 48849ad6467SDenis V. Lunev } 48949ad6467SDenis V. Lunev } 49049ad6467SDenis V. Lunev 491e0b5207fSVladimir Sementsov-Ogievskiy res->image_end_offset = high_off + s->cluster_size; 49249ad6467SDenis V. Lunev if (size > res->image_end_offset) { 49349ad6467SDenis V. Lunev int64_t count; 494e0b5207fSVladimir Sementsov-Ogievskiy count = DIV_ROUND_UP(size - res->image_end_offset, s->cluster_size); 49549ad6467SDenis V. Lunev fprintf(stderr, "%s space leaked at the end of the image %" PRId64 "\n", 49649ad6467SDenis V. Lunev fix & BDRV_FIX_LEAKS ? "Repairing" : "ERROR", 49749ad6467SDenis V. Lunev size - res->image_end_offset); 49849ad6467SDenis V. Lunev res->leaks += count; 49949ad6467SDenis V. Lunev if (fix & BDRV_FIX_LEAKS) { 500ed3d2ec9SMax Reitz Error *local_err = NULL; 501e8d04f92SMax Reitz 502e8d04f92SMax Reitz /* 503e8d04f92SMax Reitz * In order to really repair the image, we must shrink it. 504e8d04f92SMax Reitz * That means we have to pass exact=true. 505e8d04f92SMax Reitz */ 506e8d04f92SMax Reitz ret = bdrv_truncate(bs->file, res->image_end_offset, true, 5077b8e4857SKevin Wolf PREALLOC_MODE_OFF, 0, &local_err); 50849ad6467SDenis V. Lunev if (ret < 0) { 509ed3d2ec9SMax Reitz error_report_err(local_err); 51049ad6467SDenis V. Lunev res->check_errors++; 5112fd61638SPaolo Bonzini goto out; 51249ad6467SDenis V. Lunev } 51349ad6467SDenis V. Lunev res->leaks_fixed += count; 51449ad6467SDenis V. Lunev } 51549ad6467SDenis V. Lunev } 51649ad6467SDenis V. Lunev 5172fd61638SPaolo Bonzini out: 5182fd61638SPaolo Bonzini qemu_co_mutex_unlock(&s->lock); 5192fd61638SPaolo Bonzini return ret; 52049ad6467SDenis V. Lunev } 52149ad6467SDenis V. Lunev 52249ad6467SDenis V. Lunev 5231511b490SKevin Wolf static int coroutine_fn parallels_co_create(BlockdevCreateOptions* opts, 524efc75e2aSStefan Hajnoczi Error **errp) 52574cf6c50SDenis V. Lunev { 5261511b490SKevin Wolf BlockdevCreateOptionsParallels *parallels_opts; 5271511b490SKevin Wolf BlockDriverState *bs; 5281511b490SKevin Wolf BlockBackend *blk; 52974cf6c50SDenis V. Lunev int64_t total_size, cl_size; 530369f7de9SDenis V. Lunev uint32_t bat_entries, bat_sectors; 53174cf6c50SDenis V. Lunev ParallelsHeader header; 5321511b490SKevin Wolf uint8_t tmp[BDRV_SECTOR_SIZE]; 53374cf6c50SDenis V. Lunev int ret; 53474cf6c50SDenis V. Lunev 5351511b490SKevin Wolf assert(opts->driver == BLOCKDEV_DRIVER_PARALLELS); 5361511b490SKevin Wolf parallels_opts = &opts->u.parallels; 5371511b490SKevin Wolf 5381511b490SKevin Wolf /* Sanity checks */ 5391511b490SKevin Wolf total_size = parallels_opts->size; 5401511b490SKevin Wolf 5411511b490SKevin Wolf if (parallels_opts->has_cluster_size) { 5421511b490SKevin Wolf cl_size = parallels_opts->cluster_size; 5431511b490SKevin Wolf } else { 5441511b490SKevin Wolf cl_size = DEFAULT_CLUSTER_SIZE; 5451511b490SKevin Wolf } 5461511b490SKevin Wolf 5472332d825SKevin Wolf /* XXX What is the real limit here? This is an insanely large maximum. */ 5482332d825SKevin Wolf if (cl_size >= INT64_MAX / MAX_PARALLELS_IMAGE_FACTOR) { 5492332d825SKevin Wolf error_setg(errp, "Cluster size is too large"); 5502332d825SKevin Wolf return -EINVAL; 5512332d825SKevin Wolf } 552555a608cSKlim Kireev if (total_size >= MAX_PARALLELS_IMAGE_FACTOR * cl_size) { 5531511b490SKevin Wolf error_setg(errp, "Image size is too large for this cluster size"); 554555a608cSKlim Kireev return -E2BIG; 555555a608cSKlim Kireev } 55674cf6c50SDenis V. Lunev 5571511b490SKevin Wolf if (!QEMU_IS_ALIGNED(total_size, BDRV_SECTOR_SIZE)) { 5581511b490SKevin Wolf error_setg(errp, "Image size must be a multiple of 512 bytes"); 5591511b490SKevin Wolf return -EINVAL; 56074cf6c50SDenis V. Lunev } 56174cf6c50SDenis V. Lunev 5621511b490SKevin Wolf if (!QEMU_IS_ALIGNED(cl_size, BDRV_SECTOR_SIZE)) { 5631511b490SKevin Wolf error_setg(errp, "Cluster size must be a multiple of 512 bytes"); 5641511b490SKevin Wolf return -EINVAL; 5651511b490SKevin Wolf } 5661511b490SKevin Wolf 5671511b490SKevin Wolf /* Create BlockBackend to write to the image */ 5681511b490SKevin Wolf bs = bdrv_open_blockdev_ref(parallels_opts->file, errp); 5691511b490SKevin Wolf if (bs == NULL) { 5708942764fSKevin Wolf return -EIO; 57174cf6c50SDenis V. Lunev } 5728942764fSKevin Wolf 573a3aeeab5SEric Blake blk = blk_new_with_bs(bs, BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL, 574a3aeeab5SEric Blake errp); 575a3aeeab5SEric Blake if (!blk) { 576a3aeeab5SEric Blake ret = -EPERM; 5771511b490SKevin Wolf goto out; 5781511b490SKevin Wolf } 5791511b490SKevin Wolf blk_set_allow_write_beyond_eof(blk, true); 5801511b490SKevin Wolf 5811511b490SKevin Wolf /* Create image format */ 582369f7de9SDenis V. Lunev bat_entries = DIV_ROUND_UP(total_size, cl_size); 5832d68e22eSDenis V. Lunev bat_sectors = DIV_ROUND_UP(bat_entry_off(bat_entries), cl_size); 584369f7de9SDenis V. Lunev bat_sectors = (bat_sectors * cl_size) >> BDRV_SECTOR_BITS; 58574cf6c50SDenis V. Lunev 58674cf6c50SDenis V. Lunev memset(&header, 0, sizeof(header)); 58774cf6c50SDenis V. Lunev memcpy(header.magic, HEADER_MAGIC2, sizeof(header.magic)); 58874cf6c50SDenis V. Lunev header.version = cpu_to_le32(HEADER_VERSION); 58974cf6c50SDenis V. Lunev /* don't care much about geometry, it is not used on image level */ 590908b1c84SKlim Kireev header.heads = cpu_to_le32(HEADS_NUMBER); 591908b1c84SKlim Kireev header.cylinders = cpu_to_le32(total_size / BDRV_SECTOR_SIZE 592908b1c84SKlim Kireev / HEADS_NUMBER / SEC_IN_CYL); 59374cf6c50SDenis V. Lunev header.tracks = cpu_to_le32(cl_size >> BDRV_SECTOR_BITS); 594369f7de9SDenis V. Lunev header.bat_entries = cpu_to_le32(bat_entries); 59574cf6c50SDenis V. Lunev header.nb_sectors = cpu_to_le64(DIV_ROUND_UP(total_size, BDRV_SECTOR_SIZE)); 596369f7de9SDenis V. Lunev header.data_off = cpu_to_le32(bat_sectors); 59774cf6c50SDenis V. Lunev 59874cf6c50SDenis V. Lunev /* write all the data */ 59974cf6c50SDenis V. Lunev memset(tmp, 0, sizeof(tmp)); 60074cf6c50SDenis V. Lunev memcpy(tmp, &header, sizeof(header)); 60174cf6c50SDenis V. Lunev 6021511b490SKevin Wolf ret = blk_pwrite(blk, 0, tmp, BDRV_SECTOR_SIZE, 0); 60374cf6c50SDenis V. Lunev if (ret < 0) { 60474cf6c50SDenis V. Lunev goto exit; 60574cf6c50SDenis V. Lunev } 6061511b490SKevin Wolf ret = blk_pwrite_zeroes(blk, BDRV_SECTOR_SIZE, 607983a1600SEric Blake (bat_sectors - 1) << BDRV_SECTOR_BITS, 0); 60874cf6c50SDenis V. Lunev if (ret < 0) { 60974cf6c50SDenis V. Lunev goto exit; 61074cf6c50SDenis V. Lunev } 61174cf6c50SDenis V. Lunev 6121511b490SKevin Wolf ret = 0; 6131511b490SKevin Wolf out: 6141511b490SKevin Wolf blk_unref(blk); 6151511b490SKevin Wolf bdrv_unref(bs); 61674cf6c50SDenis V. Lunev return ret; 61774cf6c50SDenis V. Lunev 61874cf6c50SDenis V. Lunev exit: 61974cf6c50SDenis V. Lunev error_setg_errno(errp, -ret, "Failed to create Parallels image"); 6201511b490SKevin Wolf goto out; 6211511b490SKevin Wolf } 6221511b490SKevin Wolf 623b92902dfSMaxim Levitsky static int coroutine_fn parallels_co_create_opts(BlockDriver *drv, 624b92902dfSMaxim Levitsky const char *filename, 6251511b490SKevin Wolf QemuOpts *opts, 6261511b490SKevin Wolf Error **errp) 6271511b490SKevin Wolf { 6281511b490SKevin Wolf BlockdevCreateOptions *create_options = NULL; 6291511b490SKevin Wolf BlockDriverState *bs = NULL; 63092adf9dbSMarkus Armbruster QDict *qdict; 6311511b490SKevin Wolf Visitor *v; 6321511b490SKevin Wolf int ret; 6331511b490SKevin Wolf 6341511b490SKevin Wolf static const QDictRenames opt_renames[] = { 6351511b490SKevin Wolf { BLOCK_OPT_CLUSTER_SIZE, "cluster-size" }, 6361511b490SKevin Wolf { NULL, NULL }, 6371511b490SKevin Wolf }; 6381511b490SKevin Wolf 6391511b490SKevin Wolf /* Parse options and convert legacy syntax */ 6401511b490SKevin Wolf qdict = qemu_opts_to_qdict_filtered(opts, NULL, ¶llels_create_opts, 6411511b490SKevin Wolf true); 6421511b490SKevin Wolf 6431511b490SKevin Wolf if (!qdict_rename_keys(qdict, opt_renames, errp)) { 6441511b490SKevin Wolf ret = -EINVAL; 64574cf6c50SDenis V. Lunev goto done; 64674cf6c50SDenis V. Lunev } 64774cf6c50SDenis V. Lunev 6481511b490SKevin Wolf /* Create and open the file (protocol layer) */ 649668f62ecSMarkus Armbruster ret = bdrv_create_file(filename, opts, errp); 6501511b490SKevin Wolf if (ret < 0) { 6511511b490SKevin Wolf goto done; 6521511b490SKevin Wolf } 6531511b490SKevin Wolf 6541511b490SKevin Wolf bs = bdrv_open(filename, NULL, NULL, 6551511b490SKevin Wolf BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp); 6561511b490SKevin Wolf if (bs == NULL) { 6571511b490SKevin Wolf ret = -EIO; 6581511b490SKevin Wolf goto done; 6591511b490SKevin Wolf } 6601511b490SKevin Wolf 6611511b490SKevin Wolf /* Now get the QAPI type BlockdevCreateOptions */ 6621511b490SKevin Wolf qdict_put_str(qdict, "driver", "parallels"); 6631511b490SKevin Wolf qdict_put_str(qdict, "file", bs->node_name); 6641511b490SKevin Wolf 665af91062eSMarkus Armbruster v = qobject_input_visitor_new_flat_confused(qdict, errp); 666af91062eSMarkus Armbruster if (!v) { 6671511b490SKevin Wolf ret = -EINVAL; 6681511b490SKevin Wolf goto done; 6691511b490SKevin Wolf } 6701511b490SKevin Wolf 671b11a093cSMarkus Armbruster visit_type_BlockdevCreateOptions(v, NULL, &create_options, errp); 6721511b490SKevin Wolf visit_free(v); 673b11a093cSMarkus Armbruster if (!create_options) { 6741511b490SKevin Wolf ret = -EINVAL; 6751511b490SKevin Wolf goto done; 6761511b490SKevin Wolf } 6771511b490SKevin Wolf 6781511b490SKevin Wolf /* Silently round up sizes */ 6791511b490SKevin Wolf create_options->u.parallels.size = 6801511b490SKevin Wolf ROUND_UP(create_options->u.parallels.size, BDRV_SECTOR_SIZE); 6811511b490SKevin Wolf create_options->u.parallels.cluster_size = 6821511b490SKevin Wolf ROUND_UP(create_options->u.parallels.cluster_size, BDRV_SECTOR_SIZE); 6831511b490SKevin Wolf 6841511b490SKevin Wolf /* Create the Parallels image (format layer) */ 6851511b490SKevin Wolf ret = parallels_co_create(create_options, errp); 6861511b490SKevin Wolf if (ret < 0) { 6871511b490SKevin Wolf goto done; 6881511b490SKevin Wolf } 6891511b490SKevin Wolf ret = 0; 6901511b490SKevin Wolf 6911511b490SKevin Wolf done: 692cb3e7f08SMarc-André Lureau qobject_unref(qdict); 6931511b490SKevin Wolf bdrv_unref(bs); 6941511b490SKevin Wolf qapi_free_BlockdevCreateOptions(create_options); 6951511b490SKevin Wolf return ret; 6961511b490SKevin Wolf } 6971511b490SKevin Wolf 69823d6bd3bSDenis V. Lunev 69923d6bd3bSDenis V. Lunev static int parallels_probe(const uint8_t *buf, int buf_size, 70023d6bd3bSDenis V. Lunev const char *filename) 70123d6bd3bSDenis V. Lunev { 70223d6bd3bSDenis V. Lunev const ParallelsHeader *ph = (const void *)buf; 70323d6bd3bSDenis V. Lunev 70423d6bd3bSDenis V. Lunev if (buf_size < sizeof(ParallelsHeader)) { 70523d6bd3bSDenis V. Lunev return 0; 70623d6bd3bSDenis V. Lunev } 70723d6bd3bSDenis V. Lunev 70823d6bd3bSDenis V. Lunev if ((!memcmp(ph->magic, HEADER_MAGIC, 16) || 70923d6bd3bSDenis V. Lunev !memcmp(ph->magic, HEADER_MAGIC2, 16)) && 71023d6bd3bSDenis V. Lunev (le32_to_cpu(ph->version) == HEADER_VERSION)) { 71123d6bd3bSDenis V. Lunev return 100; 71223d6bd3bSDenis V. Lunev } 71323d6bd3bSDenis V. Lunev 71423d6bd3bSDenis V. Lunev return 0; 71523d6bd3bSDenis V. Lunev } 71623d6bd3bSDenis V. Lunev 7176dd6b9f1SDenis V. Lunev static int parallels_update_header(BlockDriverState *bs) 7186dd6b9f1SDenis V. Lunev { 7196dd6b9f1SDenis V. Lunev BDRVParallelsState *s = bs->opaque; 7209a4f4c31SKevin Wolf unsigned size = MAX(bdrv_opt_mem_align(bs->file->bs), 7219a4f4c31SKevin Wolf sizeof(ParallelsHeader)); 7226dd6b9f1SDenis V. Lunev 7236dd6b9f1SDenis V. Lunev if (size > s->header_size) { 7246dd6b9f1SDenis V. Lunev size = s->header_size; 7256dd6b9f1SDenis V. Lunev } 726d9ca2ea2SKevin Wolf return bdrv_pwrite_sync(bs->file, 0, s->header, size); 7276dd6b9f1SDenis V. Lunev } 7286dd6b9f1SDenis V. Lunev 72923d6bd3bSDenis V. Lunev static int parallels_open(BlockDriverState *bs, QDict *options, int flags, 73023d6bd3bSDenis V. Lunev Error **errp) 73123d6bd3bSDenis V. Lunev { 73223d6bd3bSDenis V. Lunev BDRVParallelsState *s = bs->opaque; 73323d6bd3bSDenis V. Lunev ParallelsHeader ph; 73419f5dc15SDenis V. Lunev int ret, size, i; 735d6179011SDenis V. Lunev QemuOpts *opts = NULL; 736d6179011SDenis V. Lunev Error *local_err = NULL; 737d6179011SDenis V. Lunev char *buf; 73823d6bd3bSDenis V. Lunev 7398b1869daSMax Reitz bs->file = bdrv_open_child(NULL, options, "file", bs, &child_of_bds, 7408b1869daSMax Reitz BDRV_CHILD_IMAGE, false, errp); 7414e4bf5c4SKevin Wolf if (!bs->file) { 7424e4bf5c4SKevin Wolf return -EINVAL; 7434e4bf5c4SKevin Wolf } 7444e4bf5c4SKevin Wolf 745cf2ab8fcSKevin Wolf ret = bdrv_pread(bs->file, 0, &ph, sizeof(ph)); 74623d6bd3bSDenis V. Lunev if (ret < 0) { 74723d6bd3bSDenis V. Lunev goto fail; 74823d6bd3bSDenis V. Lunev } 74923d6bd3bSDenis V. Lunev 75023d6bd3bSDenis V. Lunev bs->total_sectors = le64_to_cpu(ph.nb_sectors); 75123d6bd3bSDenis V. Lunev 75223d6bd3bSDenis V. Lunev if (le32_to_cpu(ph.version) != HEADER_VERSION) { 75323d6bd3bSDenis V. Lunev goto fail_format; 75423d6bd3bSDenis V. Lunev } 75523d6bd3bSDenis V. Lunev if (!memcmp(ph.magic, HEADER_MAGIC, 16)) { 75623d6bd3bSDenis V. Lunev s->off_multiplier = 1; 75723d6bd3bSDenis V. Lunev bs->total_sectors = 0xffffffff & bs->total_sectors; 75823d6bd3bSDenis V. Lunev } else if (!memcmp(ph.magic, HEADER_MAGIC2, 16)) { 75923d6bd3bSDenis V. Lunev s->off_multiplier = le32_to_cpu(ph.tracks); 76023d6bd3bSDenis V. Lunev } else { 76123d6bd3bSDenis V. Lunev goto fail_format; 76223d6bd3bSDenis V. Lunev } 76323d6bd3bSDenis V. Lunev 76423d6bd3bSDenis V. Lunev s->tracks = le32_to_cpu(ph.tracks); 76523d6bd3bSDenis V. Lunev if (s->tracks == 0) { 76623d6bd3bSDenis V. Lunev error_setg(errp, "Invalid image: Zero sectors per track"); 76723d6bd3bSDenis V. Lunev ret = -EINVAL; 76823d6bd3bSDenis V. Lunev goto fail; 76923d6bd3bSDenis V. Lunev } 77023d6bd3bSDenis V. Lunev if (s->tracks > INT32_MAX/513) { 77123d6bd3bSDenis V. Lunev error_setg(errp, "Invalid image: Too big cluster"); 77223d6bd3bSDenis V. Lunev ret = -EFBIG; 77323d6bd3bSDenis V. Lunev goto fail; 77423d6bd3bSDenis V. Lunev } 775e0b5207fSVladimir Sementsov-Ogievskiy s->cluster_size = s->tracks << BDRV_SECTOR_BITS; 77623d6bd3bSDenis V. Lunev 77723d6bd3bSDenis V. Lunev s->bat_size = le32_to_cpu(ph.bat_entries); 77823d6bd3bSDenis V. Lunev if (s->bat_size > INT_MAX / sizeof(uint32_t)) { 77923d6bd3bSDenis V. Lunev error_setg(errp, "Catalog too large"); 78023d6bd3bSDenis V. Lunev ret = -EFBIG; 78123d6bd3bSDenis V. Lunev goto fail; 78223d6bd3bSDenis V. Lunev } 78323d6bd3bSDenis V. Lunev 7842d68e22eSDenis V. Lunev size = bat_entry_off(s->bat_size); 7859a4f4c31SKevin Wolf s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file->bs)); 7869a4f4c31SKevin Wolf s->header = qemu_try_blockalign(bs->file->bs, s->header_size); 78723d6bd3bSDenis V. Lunev if (s->header == NULL) { 78823d6bd3bSDenis V. Lunev ret = -ENOMEM; 78923d6bd3bSDenis V. Lunev goto fail; 79023d6bd3bSDenis V. Lunev } 79119f5dc15SDenis V. Lunev s->data_end = le32_to_cpu(ph.data_off); 79219f5dc15SDenis V. Lunev if (s->data_end == 0) { 79319f5dc15SDenis V. Lunev s->data_end = ROUND_UP(bat_entry_off(s->bat_size), BDRV_SECTOR_SIZE); 79419f5dc15SDenis V. Lunev } 79519f5dc15SDenis V. Lunev if (s->data_end < s->header_size) { 79623d6bd3bSDenis V. Lunev /* there is not enough unused space to fit to block align between BAT 79723d6bd3bSDenis V. Lunev and actual data. We can't avoid read-modify-write... */ 79823d6bd3bSDenis V. Lunev s->header_size = size; 79923d6bd3bSDenis V. Lunev } 80023d6bd3bSDenis V. Lunev 801cf2ab8fcSKevin Wolf ret = bdrv_pread(bs->file, 0, s->header, s->header_size); 80223d6bd3bSDenis V. Lunev if (ret < 0) { 80323d6bd3bSDenis V. Lunev goto fail; 80423d6bd3bSDenis V. Lunev } 80523d6bd3bSDenis V. Lunev s->bat_bitmap = (uint32_t *)(s->header + 1); 80623d6bd3bSDenis V. Lunev 80719f5dc15SDenis V. Lunev for (i = 0; i < s->bat_size; i++) { 80819f5dc15SDenis V. Lunev int64_t off = bat2sect(s, i); 80919f5dc15SDenis V. Lunev if (off >= s->data_end) { 81019f5dc15SDenis V. Lunev s->data_end = off + s->tracks; 81119f5dc15SDenis V. Lunev } 81219f5dc15SDenis V. Lunev } 81319f5dc15SDenis V. Lunev 8146dd6b9f1SDenis V. Lunev if (le32_to_cpu(ph.inuse) == HEADER_INUSE_MAGIC) { 8156dd6b9f1SDenis V. Lunev /* Image was not closed correctly. The check is mandatory */ 8166dd6b9f1SDenis V. Lunev s->header_unclean = true; 8176dd6b9f1SDenis V. Lunev if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_CHECK)) { 8186dd6b9f1SDenis V. Lunev error_setg(errp, "parallels: Image was not closed correctly; " 8196dd6b9f1SDenis V. Lunev "cannot be opened read/write"); 8206dd6b9f1SDenis V. Lunev ret = -EACCES; 8216dd6b9f1SDenis V. Lunev goto fail; 8226dd6b9f1SDenis V. Lunev } 8236dd6b9f1SDenis V. Lunev } 8246dd6b9f1SDenis V. Lunev 825c6ecec43SMarkus Armbruster opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, errp); 826c6ecec43SMarkus Armbruster if (!opts) { 827d6179011SDenis V. Lunev goto fail_options; 828d6179011SDenis V. Lunev } 829d6179011SDenis V. Lunev 830a5f9b9dfSMarkus Armbruster if (!qemu_opts_absorb_qdict(opts, options, errp)) { 831d6179011SDenis V. Lunev goto fail_options; 832d6179011SDenis V. Lunev } 833d6179011SDenis V. Lunev 834d6179011SDenis V. Lunev s->prealloc_size = 835d6179011SDenis V. Lunev qemu_opt_get_size_del(opts, PARALLELS_OPT_PREALLOC_SIZE, 0); 836d6179011SDenis V. Lunev s->prealloc_size = MAX(s->tracks, s->prealloc_size >> BDRV_SECTOR_BITS); 837d6179011SDenis V. Lunev buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE); 838bda4cdcbSEric Blake /* prealloc_mode can be downgraded later during allocate_clusters */ 839f7abe0ecSMarc-André Lureau s->prealloc_mode = qapi_enum_parse(&prealloc_mode_lookup, buf, 84006c60b6cSMarkus Armbruster PRL_PREALLOC_MODE_FALLOCATE, 84106c60b6cSMarkus Armbruster &local_err); 842d6179011SDenis V. Lunev g_free(buf); 843d6179011SDenis V. Lunev if (local_err != NULL) { 8444bc6d7eeSMarkus Armbruster error_propagate(errp, local_err); 845d6179011SDenis V. Lunev goto fail_options; 846d6179011SDenis V. Lunev } 847dc62da88SDenis V. Lunev 848baefd977SVladimir Sementsov-Ogievskiy if (ph.ext_off) { 849baefd977SVladimir Sementsov-Ogievskiy if (flags & BDRV_O_RDWR) { 850baefd977SVladimir Sementsov-Ogievskiy /* 851baefd977SVladimir Sementsov-Ogievskiy * It's unsafe to open image RW if there is an extension (as we 852baefd977SVladimir Sementsov-Ogievskiy * don't support it). But parallels driver in QEMU historically 853baefd977SVladimir Sementsov-Ogievskiy * ignores the extension, so print warning and don't care. 854baefd977SVladimir Sementsov-Ogievskiy */ 855baefd977SVladimir Sementsov-Ogievskiy warn_report("Format Extension ignored in RW mode"); 856baefd977SVladimir Sementsov-Ogievskiy } else { 857baefd977SVladimir Sementsov-Ogievskiy ret = parallels_read_format_extension( 858baefd977SVladimir Sementsov-Ogievskiy bs, le64_to_cpu(ph.ext_off) << BDRV_SECTOR_BITS, errp); 859baefd977SVladimir Sementsov-Ogievskiy if (ret < 0) { 860baefd977SVladimir Sementsov-Ogievskiy goto fail; 861baefd977SVladimir Sementsov-Ogievskiy } 862baefd977SVladimir Sementsov-Ogievskiy } 863baefd977SVladimir Sementsov-Ogievskiy } 864baefd977SVladimir Sementsov-Ogievskiy 8656c7d390bSJeff Cody if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_INACTIVE)) { 8666dd6b9f1SDenis V. Lunev s->header->inuse = cpu_to_le32(HEADER_INUSE_MAGIC); 8676dd6b9f1SDenis V. Lunev ret = parallels_update_header(bs); 8686dd6b9f1SDenis V. Lunev if (ret < 0) { 8696dd6b9f1SDenis V. Lunev goto fail; 8706dd6b9f1SDenis V. Lunev } 8716dd6b9f1SDenis V. Lunev } 8726dd6b9f1SDenis V. Lunev 873038adc2fSWei Yang s->bat_dirty_block = 4 * qemu_real_host_page_size; 8740d31c7c2SDenis V. Lunev s->bat_dirty_bmap = 8750d31c7c2SDenis V. Lunev bitmap_new(DIV_ROUND_UP(s->header_size, s->bat_dirty_block)); 8760d31c7c2SDenis V. Lunev 877a94750d9SEmanuele Giuseppe Esposito /* Disable migration until bdrv_activate method is added */ 8781d0f37cfSJeff Cody error_setg(&s->migration_blocker, "The Parallels format used by node '%s' " 8791d0f37cfSJeff Cody "does not support live migration", 8801d0f37cfSJeff Cody bdrv_get_device_or_node_name(bs)); 881386f6c07SMarkus Armbruster ret = migrate_add_blocker(s->migration_blocker, errp); 882386f6c07SMarkus Armbruster if (ret < 0) { 8831d0f37cfSJeff Cody error_free(s->migration_blocker); 8841d0f37cfSJeff Cody goto fail; 8851d0f37cfSJeff Cody } 88623d6bd3bSDenis V. Lunev qemu_co_mutex_init(&s->lock); 88723d6bd3bSDenis V. Lunev return 0; 88823d6bd3bSDenis V. Lunev 88923d6bd3bSDenis V. Lunev fail_format: 89023d6bd3bSDenis V. Lunev error_setg(errp, "Image not in Parallels format"); 8914bc6d7eeSMarkus Armbruster fail_options: 89223d6bd3bSDenis V. Lunev ret = -EINVAL; 89323d6bd3bSDenis V. Lunev fail: 89423d6bd3bSDenis V. Lunev qemu_vfree(s->header); 89523d6bd3bSDenis V. Lunev return ret; 89623d6bd3bSDenis V. Lunev } 89723d6bd3bSDenis V. Lunev 89823d6bd3bSDenis V. Lunev 899019d6b8fSAnthony Liguori static void parallels_close(BlockDriverState *bs) 900019d6b8fSAnthony Liguori { 901019d6b8fSAnthony Liguori BDRVParallelsState *s = bs->opaque; 9026dd6b9f1SDenis V. Lunev 9036c7d390bSJeff Cody if ((bs->open_flags & BDRV_O_RDWR) && !(bs->open_flags & BDRV_O_INACTIVE)) { 9046dd6b9f1SDenis V. Lunev s->header->inuse = 0; 9056dd6b9f1SDenis V. Lunev parallels_update_header(bs); 906e8d04f92SMax Reitz 907e8d04f92SMax Reitz /* errors are ignored, so we might as well pass exact=true */ 908e8d04f92SMax Reitz bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS, true, 9097b8e4857SKevin Wolf PREALLOC_MODE_OFF, 0, NULL); 91019f5dc15SDenis V. Lunev } 91119f5dc15SDenis V. Lunev 9120d31c7c2SDenis V. Lunev g_free(s->bat_dirty_bmap); 9139eae9ccaSDenis V. Lunev qemu_vfree(s->header); 9141d0f37cfSJeff Cody 9151d0f37cfSJeff Cody migrate_del_blocker(s->migration_blocker); 9161d0f37cfSJeff Cody error_free(s->migration_blocker); 917019d6b8fSAnthony Liguori } 918019d6b8fSAnthony Liguori 919019d6b8fSAnthony Liguori static BlockDriver bdrv_parallels = { 920019d6b8fSAnthony Liguori .format_name = "parallels", 921019d6b8fSAnthony Liguori .instance_size = sizeof(BDRVParallelsState), 922019d6b8fSAnthony Liguori .bdrv_probe = parallels_probe, 9231dec5a70SChristoph Hellwig .bdrv_open = parallels_open, 924019d6b8fSAnthony Liguori .bdrv_close = parallels_close, 92569dca43dSMax Reitz .bdrv_child_perm = bdrv_default_perms, 9268e0cf59dSEric Blake .bdrv_co_block_status = parallels_co_block_status, 927d0e61ce5SDenis V. Lunev .bdrv_has_zero_init = bdrv_has_zero_init_1, 9280d31c7c2SDenis V. Lunev .bdrv_co_flush_to_os = parallels_co_flush_to_os, 929481fb9cfSDenis V. Lunev .bdrv_co_readv = parallels_co_readv, 9305a41e1faSDenis V. Lunev .bdrv_co_writev = parallels_co_writev, 931d67066d8SMax Reitz .is_format = true, 932bcbb3866SEdgar Kaziakhmedov .supports_backing = true, 9331511b490SKevin Wolf .bdrv_co_create = parallels_co_create, 934efc75e2aSStefan Hajnoczi .bdrv_co_create_opts = parallels_co_create_opts, 9352fd61638SPaolo Bonzini .bdrv_co_check = parallels_co_check, 93674cf6c50SDenis V. Lunev .create_opts = ¶llels_create_opts, 937019d6b8fSAnthony Liguori }; 938019d6b8fSAnthony Liguori 939019d6b8fSAnthony Liguori static void bdrv_parallels_init(void) 940019d6b8fSAnthony Liguori { 941019d6b8fSAnthony Liguori bdrv_register(&bdrv_parallels); 942019d6b8fSAnthony Liguori } 943019d6b8fSAnthony Liguori 944019d6b8fSAnthony Liguori block_init(bdrv_parallels_init); 945