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" 32da34e65cSMarkus Armbruster #include "qapi/error.h" 33737e150eSPaolo Bonzini #include "block/block_int.h" 34609f45eaSMax Reitz #include "block/qdict.h" 358942764fSKevin Wolf #include "sysemu/block-backend.h" 361de7afc9SPaolo Bonzini #include "qemu/module.h" 37922a01a0SMarkus Armbruster #include "qemu/option.h" 381511b490SKevin Wolf #include "qapi/qmp/qdict.h" 391511b490SKevin Wolf #include "qapi/qobject-input-visitor.h" 401511b490SKevin Wolf #include "qapi/qapi-visit-block-core.h" 4158369e22SPaolo Bonzini #include "qemu/bswap.h" 420d31c7c2SDenis V. Lunev #include "qemu/bitmap.h" 431d0f37cfSJeff Cody #include "migration/blocker.h" 4490fe66f0SKlim Kireev #include "parallels.h" 45019d6b8fSAnthony Liguori 46019d6b8fSAnthony Liguori /**************************************************************/ 47019d6b8fSAnthony Liguori 48019d6b8fSAnthony Liguori #define HEADER_MAGIC "WithoutFreeSpace" 49d25d5980SDenis V. Lunev #define HEADER_MAGIC2 "WithouFreSpacExt" 50019d6b8fSAnthony Liguori #define HEADER_VERSION 2 516dd6b9f1SDenis V. Lunev #define HEADER_INUSE_MAGIC (0x746F6E59) 52555a608cSKlim Kireev #define MAX_PARALLELS_IMAGE_FACTOR (1ull << 32) 53019d6b8fSAnthony Liguori 54f7abe0ecSMarc-André Lureau static QEnumLookup prealloc_mode_lookup = { 55f7abe0ecSMarc-André Lureau .array = (const char *const[]) { 56d6179011SDenis V. Lunev "falloc", 57d6179011SDenis V. Lunev "truncate", 58f7abe0ecSMarc-André Lureau }, 59f7abe0ecSMarc-André Lureau .size = PRL_PREALLOC_MODE__MAX 60d6179011SDenis V. Lunev }; 61d6179011SDenis V. Lunev 62d6179011SDenis V. Lunev #define PARALLELS_OPT_PREALLOC_MODE "prealloc-mode" 63d6179011SDenis V. Lunev #define PARALLELS_OPT_PREALLOC_SIZE "prealloc-size" 64d6179011SDenis V. Lunev 65d6179011SDenis V. Lunev static QemuOptsList parallels_runtime_opts = { 66d6179011SDenis V. Lunev .name = "parallels", 67d6179011SDenis V. Lunev .head = QTAILQ_HEAD_INITIALIZER(parallels_runtime_opts.head), 68d6179011SDenis V. Lunev .desc = { 69d6179011SDenis V. Lunev { 70d6179011SDenis V. Lunev .name = PARALLELS_OPT_PREALLOC_SIZE, 71d6179011SDenis V. Lunev .type = QEMU_OPT_SIZE, 72d6179011SDenis V. Lunev .help = "Preallocation size on image expansion", 73ff5bbe56SEdgar Kaziahmedov .def_value_str = "128M", 74d6179011SDenis V. Lunev }, 75d6179011SDenis V. Lunev { 76d6179011SDenis V. Lunev .name = PARALLELS_OPT_PREALLOC_MODE, 77d6179011SDenis V. Lunev .type = QEMU_OPT_STRING, 78d6179011SDenis V. Lunev .help = "Preallocation mode on image expansion " 79d6179011SDenis V. Lunev "(allowed values: falloc, truncate)", 80d6179011SDenis V. Lunev .def_value_str = "falloc", 81d6179011SDenis V. Lunev }, 82d6179011SDenis V. Lunev { /* end of list */ }, 83d6179011SDenis V. Lunev }, 84d6179011SDenis V. Lunev }; 85d6179011SDenis V. Lunev 861511b490SKevin Wolf static QemuOptsList parallels_create_opts = { 871511b490SKevin Wolf .name = "parallels-create-opts", 881511b490SKevin Wolf .head = QTAILQ_HEAD_INITIALIZER(parallels_create_opts.head), 891511b490SKevin Wolf .desc = { 901511b490SKevin Wolf { 911511b490SKevin Wolf .name = BLOCK_OPT_SIZE, 921511b490SKevin Wolf .type = QEMU_OPT_SIZE, 931511b490SKevin Wolf .help = "Virtual disk size", 941511b490SKevin Wolf }, 951511b490SKevin Wolf { 961511b490SKevin Wolf .name = BLOCK_OPT_CLUSTER_SIZE, 971511b490SKevin Wolf .type = QEMU_OPT_SIZE, 981511b490SKevin Wolf .help = "Parallels image cluster size", 991511b490SKevin Wolf .def_value_str = stringify(DEFAULT_CLUSTER_SIZE), 1001511b490SKevin Wolf }, 1011511b490SKevin Wolf { /* end of list */ } 1021511b490SKevin Wolf } 1031511b490SKevin Wolf }; 1041511b490SKevin Wolf 105d6179011SDenis V. Lunev 106555cc9d9SDenis V. Lunev static int64_t bat2sect(BDRVParallelsState *s, uint32_t idx) 107555cc9d9SDenis V. Lunev { 108dd97cdc0SDenis V. Lunev return (uint64_t)le32_to_cpu(s->bat_bitmap[idx]) * s->off_multiplier; 109555cc9d9SDenis V. Lunev } 110555cc9d9SDenis V. Lunev 1112d68e22eSDenis V. Lunev static uint32_t bat_entry_off(uint32_t idx) 1122d68e22eSDenis V. Lunev { 1132d68e22eSDenis V. Lunev return sizeof(ParallelsHeader) + sizeof(uint32_t) * idx; 1142d68e22eSDenis V. Lunev } 1152d68e22eSDenis V. Lunev 11629442569SRoman Kagan static int64_t seek_to_sector(BDRVParallelsState *s, int64_t sector_num) 117019d6b8fSAnthony Liguori { 118c34d2451SDavid Woodhouse uint32_t index, offset; 119019d6b8fSAnthony Liguori 120019d6b8fSAnthony Liguori index = sector_num / s->tracks; 121019d6b8fSAnthony Liguori offset = sector_num % s->tracks; 122019d6b8fSAnthony Liguori 1239d8b88f6SChristoph Hellwig /* not allocated */ 124369f7de9SDenis V. Lunev if ((index >= s->bat_size) || (s->bat_bitmap[index] == 0)) { 125019d6b8fSAnthony Liguori return -1; 126369f7de9SDenis V. Lunev } 127555cc9d9SDenis V. Lunev return bat2sect(s, index) + offset; 128019d6b8fSAnthony Liguori } 129019d6b8fSAnthony Liguori 1309de9da17SRoman Kagan static int cluster_remainder(BDRVParallelsState *s, int64_t sector_num, 1319de9da17SRoman Kagan int nb_sectors) 1329de9da17SRoman Kagan { 1339de9da17SRoman Kagan int ret = s->tracks - sector_num % s->tracks; 1349de9da17SRoman Kagan return MIN(nb_sectors, ret); 1359de9da17SRoman Kagan } 1369de9da17SRoman Kagan 1376953d920SDenis V. Lunev static int64_t block_status(BDRVParallelsState *s, int64_t sector_num, 1386953d920SDenis V. Lunev int nb_sectors, int *pnum) 1396953d920SDenis V. Lunev { 1406953d920SDenis V. Lunev int64_t start_off = -2, prev_end_off = -2; 1416953d920SDenis V. Lunev 1426953d920SDenis V. Lunev *pnum = 0; 1436953d920SDenis V. Lunev while (nb_sectors > 0 || start_off == -2) { 1446953d920SDenis V. Lunev int64_t offset = seek_to_sector(s, sector_num); 1456953d920SDenis V. Lunev int to_end; 1466953d920SDenis V. Lunev 1476953d920SDenis V. Lunev if (start_off == -2) { 1486953d920SDenis V. Lunev start_off = offset; 1496953d920SDenis V. Lunev prev_end_off = offset; 1506953d920SDenis V. Lunev } else if (offset != prev_end_off) { 1516953d920SDenis V. Lunev break; 1526953d920SDenis V. Lunev } 1536953d920SDenis V. Lunev 1546953d920SDenis V. Lunev to_end = cluster_remainder(s, sector_num, nb_sectors); 1556953d920SDenis V. Lunev nb_sectors -= to_end; 1566953d920SDenis V. Lunev sector_num += to_end; 1576953d920SDenis V. Lunev *pnum += to_end; 1586953d920SDenis V. Lunev 1596953d920SDenis V. Lunev if (offset > 0) { 1606953d920SDenis V. Lunev prev_end_off += to_end; 1616953d920SDenis V. Lunev } 1626953d920SDenis V. Lunev } 1636953d920SDenis V. Lunev return start_off; 1646953d920SDenis V. Lunev } 1656953d920SDenis V. Lunev 166ddd2ef2cSDenis V. Lunev static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num, 167ddd2ef2cSDenis V. Lunev int nb_sectors, int *pnum) 1685a41e1faSDenis V. Lunev { 169bda4cdcbSEric Blake int ret = 0; 1705a41e1faSDenis V. Lunev BDRVParallelsState *s = bs->opaque; 171d8b83e37SDenis V. Lunev int64_t pos, space, idx, to_allocate, i, len; 172ddd2ef2cSDenis V. Lunev 173ddd2ef2cSDenis V. Lunev pos = block_status(s, sector_num, nb_sectors, pnum); 174ddd2ef2cSDenis V. Lunev if (pos > 0) { 175ddd2ef2cSDenis V. Lunev return pos; 176ddd2ef2cSDenis V. Lunev } 1775a41e1faSDenis V. Lunev 1785a41e1faSDenis V. Lunev idx = sector_num / s->tracks; 179969401feSLaurent Vivier to_allocate = DIV_ROUND_UP(sector_num + *pnum, s->tracks) - idx; 18086d1bd70SMax Reitz 18186d1bd70SMax Reitz /* This function is called only by parallels_co_writev(), which will never 18286d1bd70SMax Reitz * pass a sector_num at or beyond the end of the image (because the block 18386d1bd70SMax Reitz * layer never passes such a sector_num to that function). Therefore, idx 18486d1bd70SMax Reitz * is always below s->bat_size. 18586d1bd70SMax Reitz * block_status() will limit *pnum so that sector_num + *pnum will not 18686d1bd70SMax Reitz * exceed the image end. Therefore, idx + to_allocate cannot exceed 18786d1bd70SMax Reitz * s->bat_size. 18886d1bd70SMax Reitz * Note that s->bat_size is an unsigned int, therefore idx + to_allocate 18986d1bd70SMax Reitz * will always fit into a uint32_t. */ 19086d1bd70SMax Reitz assert(idx < s->bat_size && idx + to_allocate <= s->bat_size); 19186d1bd70SMax Reitz 192ddd2ef2cSDenis V. Lunev space = to_allocate * s->tracks; 193d8b83e37SDenis V. Lunev len = bdrv_getlength(bs->file->bs); 194d8b83e37SDenis V. Lunev if (len < 0) { 195d8b83e37SDenis V. Lunev return len; 196d8b83e37SDenis V. Lunev } 197d8b83e37SDenis V. Lunev if (s->data_end + space > (len >> BDRV_SECTOR_BITS)) { 198ddd2ef2cSDenis V. Lunev space += s->prealloc_size; 199bda4cdcbSEric Blake /* 200bda4cdcbSEric Blake * We require the expanded size to read back as zero. If the 201bda4cdcbSEric Blake * user permitted truncation, we try that; but if it fails, we 202bda4cdcbSEric Blake * force the safer-but-slower fallocate. 203bda4cdcbSEric Blake */ 204bda4cdcbSEric Blake if (s->prealloc_mode == PRL_PREALLOC_MODE_TRUNCATE) { 205bda4cdcbSEric Blake ret = bdrv_truncate(bs->file, 206bda4cdcbSEric Blake (s->data_end + space) << BDRV_SECTOR_BITS, 207bda4cdcbSEric Blake false, PREALLOC_MODE_OFF, BDRV_REQ_ZERO_WRITE, 208bda4cdcbSEric Blake NULL); 209bda4cdcbSEric Blake if (ret == -ENOTSUP) { 210bda4cdcbSEric Blake s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE; 211bda4cdcbSEric Blake } 212bda4cdcbSEric Blake } 21319f5dc15SDenis V. Lunev if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) { 214720ff280SKevin Wolf ret = bdrv_pwrite_zeroes(bs->file, 21574021bc4SEric Blake s->data_end << BDRV_SECTOR_BITS, 21674021bc4SEric Blake space << BDRV_SECTOR_BITS, 0); 2175a41e1faSDenis V. Lunev } 2185a41e1faSDenis V. Lunev if (ret < 0) { 2195a41e1faSDenis V. Lunev return ret; 2205a41e1faSDenis V. Lunev } 22119f5dc15SDenis V. Lunev } 222ddd2ef2cSDenis V. Lunev 223bcbb3866SEdgar Kaziakhmedov /* Try to read from backing to fill empty clusters 224bcbb3866SEdgar Kaziakhmedov * FIXME: 1. previous write_zeroes may be redundant 225bcbb3866SEdgar Kaziakhmedov * 2. most of data we read from backing will be rewritten by 226bcbb3866SEdgar Kaziakhmedov * parallels_co_writev. On aligned-to-cluster write we do not need 227bcbb3866SEdgar Kaziakhmedov * this read at all. 228bcbb3866SEdgar Kaziakhmedov * 3. it would be good to combine write of data from backing and new 229bcbb3866SEdgar Kaziakhmedov * data into one write call */ 230bcbb3866SEdgar Kaziakhmedov if (bs->backing) { 231bcbb3866SEdgar Kaziakhmedov int64_t nb_cow_sectors = to_allocate * s->tracks; 232bcbb3866SEdgar Kaziakhmedov int64_t nb_cow_bytes = nb_cow_sectors << BDRV_SECTOR_BITS; 233a4072543SVladimir Sementsov-Ogievskiy void *buf = qemu_blockalign(bs, nb_cow_bytes); 234bcbb3866SEdgar Kaziakhmedov 235a4072543SVladimir Sementsov-Ogievskiy ret = bdrv_co_pread(bs->backing, idx * s->tracks * BDRV_SECTOR_SIZE, 236a4072543SVladimir Sementsov-Ogievskiy nb_cow_bytes, buf, 0); 237bcbb3866SEdgar Kaziakhmedov if (ret < 0) { 238a4072543SVladimir Sementsov-Ogievskiy qemu_vfree(buf); 239bcbb3866SEdgar Kaziakhmedov return ret; 240bcbb3866SEdgar Kaziakhmedov } 241bcbb3866SEdgar Kaziakhmedov 242d08c2a24SEric Blake ret = bdrv_co_pwritev(bs->file, s->data_end * BDRV_SECTOR_SIZE, 243a4072543SVladimir Sementsov-Ogievskiy nb_cow_bytes, buf, 0); 244a4072543SVladimir Sementsov-Ogievskiy qemu_vfree(buf); 245bcbb3866SEdgar Kaziakhmedov if (ret < 0) { 246bcbb3866SEdgar Kaziakhmedov return ret; 247bcbb3866SEdgar Kaziakhmedov } 248bcbb3866SEdgar Kaziakhmedov } 249bcbb3866SEdgar Kaziakhmedov 250ddd2ef2cSDenis V. Lunev for (i = 0; i < to_allocate; i++) { 251ddd2ef2cSDenis V. Lunev s->bat_bitmap[idx + i] = cpu_to_le32(s->data_end / s->off_multiplier); 25219f5dc15SDenis V. Lunev s->data_end += s->tracks; 253ddd2ef2cSDenis V. Lunev bitmap_set(s->bat_dirty_bmap, 254c9f6856dSVladimir Sementsov-Ogievskiy bat_entry_off(idx + i) / s->bat_dirty_block, 1); 255ddd2ef2cSDenis V. Lunev } 2565a41e1faSDenis V. Lunev 257ddd2ef2cSDenis V. Lunev return bat2sect(s, idx) + sector_num % s->tracks; 2585a41e1faSDenis V. Lunev } 2595a41e1faSDenis V. Lunev 2600d31c7c2SDenis V. Lunev 2610d31c7c2SDenis V. Lunev static coroutine_fn int parallels_co_flush_to_os(BlockDriverState *bs) 2620d31c7c2SDenis V. Lunev { 2630d31c7c2SDenis V. Lunev BDRVParallelsState *s = bs->opaque; 2640d31c7c2SDenis V. Lunev unsigned long size = DIV_ROUND_UP(s->header_size, s->bat_dirty_block); 2650d31c7c2SDenis V. Lunev unsigned long bit; 2660d31c7c2SDenis V. Lunev 2670d31c7c2SDenis V. Lunev qemu_co_mutex_lock(&s->lock); 2680d31c7c2SDenis V. Lunev 2690d31c7c2SDenis V. Lunev bit = find_first_bit(s->bat_dirty_bmap, size); 2700d31c7c2SDenis V. Lunev while (bit < size) { 2710d31c7c2SDenis V. Lunev uint32_t off = bit * s->bat_dirty_block; 2720d31c7c2SDenis V. Lunev uint32_t to_write = s->bat_dirty_block; 2730d31c7c2SDenis V. Lunev int ret; 2740d31c7c2SDenis V. Lunev 2750d31c7c2SDenis V. Lunev if (off + to_write > s->header_size) { 2760d31c7c2SDenis V. Lunev to_write = s->header_size - off; 2770d31c7c2SDenis V. Lunev } 278d9ca2ea2SKevin Wolf ret = bdrv_pwrite(bs->file, off, (uint8_t *)s->header + off, 2799a4f4c31SKevin Wolf to_write); 2800d31c7c2SDenis V. Lunev if (ret < 0) { 2810d31c7c2SDenis V. Lunev qemu_co_mutex_unlock(&s->lock); 2820d31c7c2SDenis V. Lunev return ret; 2830d31c7c2SDenis V. Lunev } 2840d31c7c2SDenis V. Lunev bit = find_next_bit(s->bat_dirty_bmap, size, bit + 1); 2850d31c7c2SDenis V. Lunev } 2860d31c7c2SDenis V. Lunev bitmap_zero(s->bat_dirty_bmap, size); 2870d31c7c2SDenis V. Lunev 2880d31c7c2SDenis V. Lunev qemu_co_mutex_unlock(&s->lock); 2890d31c7c2SDenis V. Lunev return 0; 2900d31c7c2SDenis V. Lunev } 2910d31c7c2SDenis V. Lunev 2920d31c7c2SDenis V. Lunev 2938e0cf59dSEric Blake static int coroutine_fn parallels_co_block_status(BlockDriverState *bs, 2948e0cf59dSEric Blake bool want_zero, 2958e0cf59dSEric Blake int64_t offset, 2968e0cf59dSEric Blake int64_t bytes, 2978e0cf59dSEric Blake int64_t *pnum, 2988e0cf59dSEric Blake int64_t *map, 2998e0cf59dSEric Blake BlockDriverState **file) 300dd3bed16SRoman Kagan { 301dd3bed16SRoman Kagan BDRVParallelsState *s = bs->opaque; 3028e0cf59dSEric Blake int count; 303dd3bed16SRoman Kagan 3048e0cf59dSEric Blake assert(QEMU_IS_ALIGNED(offset | bytes, BDRV_SECTOR_SIZE)); 305dd3bed16SRoman Kagan qemu_co_mutex_lock(&s->lock); 3068e0cf59dSEric Blake offset = block_status(s, offset >> BDRV_SECTOR_BITS, 3078e0cf59dSEric Blake bytes >> BDRV_SECTOR_BITS, &count); 308dd3bed16SRoman Kagan qemu_co_mutex_unlock(&s->lock); 309dd3bed16SRoman Kagan 3108e0cf59dSEric Blake *pnum = count * BDRV_SECTOR_SIZE; 311dd3bed16SRoman Kagan if (offset < 0) { 312dd3bed16SRoman Kagan return 0; 313dd3bed16SRoman Kagan } 314dd3bed16SRoman Kagan 3158e0cf59dSEric Blake *map = offset * BDRV_SECTOR_SIZE; 316ddf4987dSFam Zheng *file = bs->file->bs; 3178e0cf59dSEric Blake return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; 318dd3bed16SRoman Kagan } 319dd3bed16SRoman Kagan 3205a41e1faSDenis V. Lunev static coroutine_fn int parallels_co_writev(BlockDriverState *bs, 321e18a58b4SEric Blake int64_t sector_num, int nb_sectors, 322e18a58b4SEric Blake QEMUIOVector *qiov, int flags) 3235a41e1faSDenis V. Lunev { 3245a41e1faSDenis V. Lunev BDRVParallelsState *s = bs->opaque; 3255a41e1faSDenis V. Lunev uint64_t bytes_done = 0; 3265a41e1faSDenis V. Lunev QEMUIOVector hd_qiov; 3275a41e1faSDenis V. Lunev int ret = 0; 3285a41e1faSDenis V. Lunev 329e18a58b4SEric Blake assert(!flags); 3305a41e1faSDenis V. Lunev qemu_iovec_init(&hd_qiov, qiov->niov); 3315a41e1faSDenis V. Lunev 3325a41e1faSDenis V. Lunev while (nb_sectors > 0) { 3335a41e1faSDenis V. Lunev int64_t position; 3345a41e1faSDenis V. Lunev int n, nbytes; 3355a41e1faSDenis V. Lunev 3365a41e1faSDenis V. Lunev qemu_co_mutex_lock(&s->lock); 337ddd2ef2cSDenis V. Lunev position = allocate_clusters(bs, sector_num, nb_sectors, &n); 3385a41e1faSDenis V. Lunev qemu_co_mutex_unlock(&s->lock); 3395a41e1faSDenis V. Lunev if (position < 0) { 3405a41e1faSDenis V. Lunev ret = (int)position; 3415a41e1faSDenis V. Lunev break; 3425a41e1faSDenis V. Lunev } 3435a41e1faSDenis V. Lunev 3445a41e1faSDenis V. Lunev nbytes = n << BDRV_SECTOR_BITS; 3455a41e1faSDenis V. Lunev 3465a41e1faSDenis V. Lunev qemu_iovec_reset(&hd_qiov); 3475a41e1faSDenis V. Lunev qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); 3485a41e1faSDenis V. Lunev 349d08c2a24SEric Blake ret = bdrv_co_pwritev(bs->file, position * BDRV_SECTOR_SIZE, nbytes, 350d08c2a24SEric Blake &hd_qiov, 0); 3515a41e1faSDenis V. Lunev if (ret < 0) { 3525a41e1faSDenis V. Lunev break; 3535a41e1faSDenis V. Lunev } 3545a41e1faSDenis V. Lunev 3555a41e1faSDenis V. Lunev nb_sectors -= n; 3565a41e1faSDenis V. Lunev sector_num += n; 3575a41e1faSDenis V. Lunev bytes_done += nbytes; 3585a41e1faSDenis V. Lunev } 3595a41e1faSDenis V. Lunev 3605a41e1faSDenis V. Lunev qemu_iovec_destroy(&hd_qiov); 3615a41e1faSDenis V. Lunev return ret; 3625a41e1faSDenis V. Lunev } 3635a41e1faSDenis V. Lunev 364481fb9cfSDenis V. Lunev static coroutine_fn int parallels_co_readv(BlockDriverState *bs, 365481fb9cfSDenis V. Lunev int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) 366019d6b8fSAnthony Liguori { 36729442569SRoman Kagan BDRVParallelsState *s = bs->opaque; 368481fb9cfSDenis V. Lunev uint64_t bytes_done = 0; 369481fb9cfSDenis V. Lunev QEMUIOVector hd_qiov; 370481fb9cfSDenis V. Lunev int ret = 0; 371481fb9cfSDenis V. Lunev 372481fb9cfSDenis V. Lunev qemu_iovec_init(&hd_qiov, qiov->niov); 37329442569SRoman Kagan 374019d6b8fSAnthony Liguori while (nb_sectors > 0) { 375481fb9cfSDenis V. Lunev int64_t position; 376481fb9cfSDenis V. Lunev int n, nbytes; 377481fb9cfSDenis V. Lunev 378481fb9cfSDenis V. Lunev qemu_co_mutex_lock(&s->lock); 3796953d920SDenis V. Lunev position = block_status(s, sector_num, nb_sectors, &n); 380481fb9cfSDenis V. Lunev qemu_co_mutex_unlock(&s->lock); 381481fb9cfSDenis V. Lunev 382481fb9cfSDenis V. Lunev nbytes = n << BDRV_SECTOR_BITS; 383481fb9cfSDenis V. Lunev 384481fb9cfSDenis V. Lunev qemu_iovec_reset(&hd_qiov); 385481fb9cfSDenis V. Lunev qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); 386481fb9cfSDenis V. Lunev 387bcbb3866SEdgar Kaziakhmedov if (position < 0) { 388bcbb3866SEdgar Kaziakhmedov if (bs->backing) { 389d08c2a24SEric Blake ret = bdrv_co_preadv(bs->backing, sector_num * BDRV_SECTOR_SIZE, 390d08c2a24SEric Blake nbytes, &hd_qiov, 0); 391bcbb3866SEdgar Kaziakhmedov if (ret < 0) { 392bcbb3866SEdgar Kaziakhmedov break; 393bcbb3866SEdgar Kaziakhmedov } 394bcbb3866SEdgar Kaziakhmedov } else { 395bcbb3866SEdgar Kaziakhmedov qemu_iovec_memset(&hd_qiov, 0, 0, nbytes); 396bcbb3866SEdgar Kaziakhmedov } 397bcbb3866SEdgar Kaziakhmedov } else { 398d08c2a24SEric Blake ret = bdrv_co_preadv(bs->file, position * BDRV_SECTOR_SIZE, nbytes, 399d08c2a24SEric Blake &hd_qiov, 0); 400481fb9cfSDenis V. Lunev if (ret < 0) { 401481fb9cfSDenis V. Lunev break; 4029d8b88f6SChristoph Hellwig } 403019d6b8fSAnthony Liguori } 404019d6b8fSAnthony Liguori 405481fb9cfSDenis V. Lunev nb_sectors -= n; 406481fb9cfSDenis V. Lunev sector_num += n; 407481fb9cfSDenis V. Lunev bytes_done += nbytes; 408481fb9cfSDenis V. Lunev } 409481fb9cfSDenis V. Lunev 410481fb9cfSDenis V. Lunev qemu_iovec_destroy(&hd_qiov); 4112914caa0SPaolo Bonzini return ret; 4122914caa0SPaolo Bonzini } 4132914caa0SPaolo Bonzini 41449ad6467SDenis V. Lunev 4152fd61638SPaolo Bonzini static int coroutine_fn parallels_co_check(BlockDriverState *bs, 4162fd61638SPaolo Bonzini BdrvCheckResult *res, 41749ad6467SDenis V. Lunev BdrvCheckMode fix) 41849ad6467SDenis V. Lunev { 41949ad6467SDenis V. Lunev BDRVParallelsState *s = bs->opaque; 42049ad6467SDenis V. Lunev int64_t size, prev_off, high_off; 42149ad6467SDenis V. Lunev int ret; 42249ad6467SDenis V. Lunev uint32_t i; 42349ad6467SDenis V. Lunev bool flush_bat = false; 42449ad6467SDenis V. Lunev int cluster_size = s->tracks << BDRV_SECTOR_BITS; 42549ad6467SDenis V. Lunev 4269a4f4c31SKevin Wolf size = bdrv_getlength(bs->file->bs); 42749ad6467SDenis V. Lunev if (size < 0) { 42849ad6467SDenis V. Lunev res->check_errors++; 42949ad6467SDenis V. Lunev return size; 43049ad6467SDenis V. Lunev } 43149ad6467SDenis V. Lunev 4322fd61638SPaolo Bonzini qemu_co_mutex_lock(&s->lock); 4336dd6b9f1SDenis V. Lunev if (s->header_unclean) { 4346dd6b9f1SDenis V. Lunev fprintf(stderr, "%s image was not closed correctly\n", 4356dd6b9f1SDenis V. Lunev fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR"); 4366dd6b9f1SDenis V. Lunev res->corruptions++; 4376dd6b9f1SDenis V. Lunev if (fix & BDRV_FIX_ERRORS) { 4386dd6b9f1SDenis V. Lunev /* parallels_close will do the job right */ 4396dd6b9f1SDenis V. Lunev res->corruptions_fixed++; 4406dd6b9f1SDenis V. Lunev s->header_unclean = false; 4416dd6b9f1SDenis V. Lunev } 4426dd6b9f1SDenis V. Lunev } 4436dd6b9f1SDenis V. Lunev 44449ad6467SDenis V. Lunev res->bfi.total_clusters = s->bat_size; 44549ad6467SDenis V. Lunev res->bfi.compressed_clusters = 0; /* compression is not supported */ 44649ad6467SDenis V. Lunev 44749ad6467SDenis V. Lunev high_off = 0; 44849ad6467SDenis V. Lunev prev_off = 0; 44949ad6467SDenis V. Lunev for (i = 0; i < s->bat_size; i++) { 45049ad6467SDenis V. Lunev int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS; 45149ad6467SDenis V. Lunev if (off == 0) { 45249ad6467SDenis V. Lunev prev_off = 0; 45349ad6467SDenis V. Lunev continue; 45449ad6467SDenis V. Lunev } 45549ad6467SDenis V. Lunev 45649ad6467SDenis V. Lunev /* cluster outside the image */ 45749ad6467SDenis V. Lunev if (off > size) { 45849ad6467SDenis V. Lunev fprintf(stderr, "%s cluster %u is outside image\n", 45949ad6467SDenis V. Lunev fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i); 46049ad6467SDenis V. Lunev res->corruptions++; 46149ad6467SDenis V. Lunev if (fix & BDRV_FIX_ERRORS) { 46249ad6467SDenis V. Lunev prev_off = 0; 46349ad6467SDenis V. Lunev s->bat_bitmap[i] = 0; 46449ad6467SDenis V. Lunev res->corruptions_fixed++; 46549ad6467SDenis V. Lunev flush_bat = true; 46649ad6467SDenis V. Lunev continue; 46749ad6467SDenis V. Lunev } 46849ad6467SDenis V. Lunev } 46949ad6467SDenis V. Lunev 47049ad6467SDenis V. Lunev res->bfi.allocated_clusters++; 47149ad6467SDenis V. Lunev if (off > high_off) { 47249ad6467SDenis V. Lunev high_off = off; 47349ad6467SDenis V. Lunev } 47449ad6467SDenis V. Lunev 47549ad6467SDenis V. Lunev if (prev_off != 0 && (prev_off + cluster_size) != off) { 47649ad6467SDenis V. Lunev res->bfi.fragmented_clusters++; 47749ad6467SDenis V. Lunev } 47849ad6467SDenis V. Lunev prev_off = off; 47949ad6467SDenis V. Lunev } 48049ad6467SDenis V. Lunev 4812fd61638SPaolo Bonzini ret = 0; 48249ad6467SDenis V. Lunev if (flush_bat) { 483d9ca2ea2SKevin Wolf ret = bdrv_pwrite_sync(bs->file, 0, s->header, s->header_size); 48449ad6467SDenis V. Lunev if (ret < 0) { 48549ad6467SDenis V. Lunev res->check_errors++; 4862fd61638SPaolo Bonzini goto out; 48749ad6467SDenis V. Lunev } 48849ad6467SDenis V. Lunev } 48949ad6467SDenis V. Lunev 49049ad6467SDenis V. Lunev res->image_end_offset = high_off + cluster_size; 49149ad6467SDenis V. Lunev if (size > res->image_end_offset) { 49249ad6467SDenis V. Lunev int64_t count; 49349ad6467SDenis V. Lunev count = DIV_ROUND_UP(size - res->image_end_offset, cluster_size); 49449ad6467SDenis V. Lunev fprintf(stderr, "%s space leaked at the end of the image %" PRId64 "\n", 49549ad6467SDenis V. Lunev fix & BDRV_FIX_LEAKS ? "Repairing" : "ERROR", 49649ad6467SDenis V. Lunev size - res->image_end_offset); 49749ad6467SDenis V. Lunev res->leaks += count; 49849ad6467SDenis V. Lunev if (fix & BDRV_FIX_LEAKS) { 499ed3d2ec9SMax Reitz Error *local_err = NULL; 500e8d04f92SMax Reitz 501e8d04f92SMax Reitz /* 502e8d04f92SMax Reitz * In order to really repair the image, we must shrink it. 503e8d04f92SMax Reitz * That means we have to pass exact=true. 504e8d04f92SMax Reitz */ 505e8d04f92SMax Reitz ret = bdrv_truncate(bs->file, res->image_end_offset, true, 5067b8e4857SKevin Wolf PREALLOC_MODE_OFF, 0, &local_err); 50749ad6467SDenis V. Lunev if (ret < 0) { 508ed3d2ec9SMax Reitz error_report_err(local_err); 50949ad6467SDenis V. Lunev res->check_errors++; 5102fd61638SPaolo Bonzini goto out; 51149ad6467SDenis V. Lunev } 51249ad6467SDenis V. Lunev res->leaks_fixed += count; 51349ad6467SDenis V. Lunev } 51449ad6467SDenis V. Lunev } 51549ad6467SDenis V. Lunev 5162fd61638SPaolo Bonzini out: 5172fd61638SPaolo Bonzini qemu_co_mutex_unlock(&s->lock); 5182fd61638SPaolo Bonzini return ret; 51949ad6467SDenis V. Lunev } 52049ad6467SDenis V. Lunev 52149ad6467SDenis V. Lunev 5221511b490SKevin Wolf static int coroutine_fn parallels_co_create(BlockdevCreateOptions* opts, 523efc75e2aSStefan Hajnoczi Error **errp) 52474cf6c50SDenis V. Lunev { 5251511b490SKevin Wolf BlockdevCreateOptionsParallels *parallels_opts; 5261511b490SKevin Wolf BlockDriverState *bs; 5271511b490SKevin Wolf BlockBackend *blk; 52874cf6c50SDenis V. Lunev int64_t total_size, cl_size; 529369f7de9SDenis V. Lunev uint32_t bat_entries, bat_sectors; 53074cf6c50SDenis V. Lunev ParallelsHeader header; 5311511b490SKevin Wolf uint8_t tmp[BDRV_SECTOR_SIZE]; 53274cf6c50SDenis V. Lunev int ret; 53374cf6c50SDenis V. Lunev 5341511b490SKevin Wolf assert(opts->driver == BLOCKDEV_DRIVER_PARALLELS); 5351511b490SKevin Wolf parallels_opts = &opts->u.parallels; 5361511b490SKevin Wolf 5371511b490SKevin Wolf /* Sanity checks */ 5381511b490SKevin Wolf total_size = parallels_opts->size; 5391511b490SKevin Wolf 5401511b490SKevin Wolf if (parallels_opts->has_cluster_size) { 5411511b490SKevin Wolf cl_size = parallels_opts->cluster_size; 5421511b490SKevin Wolf } else { 5431511b490SKevin Wolf cl_size = DEFAULT_CLUSTER_SIZE; 5441511b490SKevin Wolf } 5451511b490SKevin Wolf 5462332d825SKevin Wolf /* XXX What is the real limit here? This is an insanely large maximum. */ 5472332d825SKevin Wolf if (cl_size >= INT64_MAX / MAX_PARALLELS_IMAGE_FACTOR) { 5482332d825SKevin Wolf error_setg(errp, "Cluster size is too large"); 5492332d825SKevin Wolf return -EINVAL; 5502332d825SKevin Wolf } 551555a608cSKlim Kireev if (total_size >= MAX_PARALLELS_IMAGE_FACTOR * cl_size) { 5521511b490SKevin Wolf error_setg(errp, "Image size is too large for this cluster size"); 553555a608cSKlim Kireev return -E2BIG; 554555a608cSKlim Kireev } 55574cf6c50SDenis V. Lunev 5561511b490SKevin Wolf if (!QEMU_IS_ALIGNED(total_size, BDRV_SECTOR_SIZE)) { 5571511b490SKevin Wolf error_setg(errp, "Image size must be a multiple of 512 bytes"); 5581511b490SKevin Wolf return -EINVAL; 55974cf6c50SDenis V. Lunev } 56074cf6c50SDenis V. Lunev 5611511b490SKevin Wolf if (!QEMU_IS_ALIGNED(cl_size, BDRV_SECTOR_SIZE)) { 5621511b490SKevin Wolf error_setg(errp, "Cluster size must be a multiple of 512 bytes"); 5631511b490SKevin Wolf return -EINVAL; 5641511b490SKevin Wolf } 5651511b490SKevin Wolf 5661511b490SKevin Wolf /* Create BlockBackend to write to the image */ 5671511b490SKevin Wolf bs = bdrv_open_blockdev_ref(parallels_opts->file, errp); 5681511b490SKevin Wolf if (bs == NULL) { 5698942764fSKevin Wolf return -EIO; 57074cf6c50SDenis V. Lunev } 5718942764fSKevin Wolf 572a3aeeab5SEric Blake blk = blk_new_with_bs(bs, BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL, 573a3aeeab5SEric Blake errp); 574a3aeeab5SEric Blake if (!blk) { 575a3aeeab5SEric Blake ret = -EPERM; 5761511b490SKevin Wolf goto out; 5771511b490SKevin Wolf } 5781511b490SKevin Wolf blk_set_allow_write_beyond_eof(blk, true); 5791511b490SKevin Wolf 5801511b490SKevin Wolf /* Create image format */ 581369f7de9SDenis V. Lunev bat_entries = DIV_ROUND_UP(total_size, cl_size); 5822d68e22eSDenis V. Lunev bat_sectors = DIV_ROUND_UP(bat_entry_off(bat_entries), cl_size); 583369f7de9SDenis V. Lunev bat_sectors = (bat_sectors * cl_size) >> BDRV_SECTOR_BITS; 58474cf6c50SDenis V. Lunev 58574cf6c50SDenis V. Lunev memset(&header, 0, sizeof(header)); 58674cf6c50SDenis V. Lunev memcpy(header.magic, HEADER_MAGIC2, sizeof(header.magic)); 58774cf6c50SDenis V. Lunev header.version = cpu_to_le32(HEADER_VERSION); 58874cf6c50SDenis V. Lunev /* don't care much about geometry, it is not used on image level */ 589908b1c84SKlim Kireev header.heads = cpu_to_le32(HEADS_NUMBER); 590908b1c84SKlim Kireev header.cylinders = cpu_to_le32(total_size / BDRV_SECTOR_SIZE 591908b1c84SKlim Kireev / HEADS_NUMBER / SEC_IN_CYL); 59274cf6c50SDenis V. Lunev header.tracks = cpu_to_le32(cl_size >> BDRV_SECTOR_BITS); 593369f7de9SDenis V. Lunev header.bat_entries = cpu_to_le32(bat_entries); 59474cf6c50SDenis V. Lunev header.nb_sectors = cpu_to_le64(DIV_ROUND_UP(total_size, BDRV_SECTOR_SIZE)); 595369f7de9SDenis V. Lunev header.data_off = cpu_to_le32(bat_sectors); 59674cf6c50SDenis V. Lunev 59774cf6c50SDenis V. Lunev /* write all the data */ 59874cf6c50SDenis V. Lunev memset(tmp, 0, sizeof(tmp)); 59974cf6c50SDenis V. Lunev memcpy(tmp, &header, sizeof(header)); 60074cf6c50SDenis V. Lunev 6011511b490SKevin Wolf ret = blk_pwrite(blk, 0, tmp, BDRV_SECTOR_SIZE, 0); 60274cf6c50SDenis V. Lunev if (ret < 0) { 60374cf6c50SDenis V. Lunev goto exit; 60474cf6c50SDenis V. Lunev } 6051511b490SKevin Wolf ret = blk_pwrite_zeroes(blk, BDRV_SECTOR_SIZE, 606983a1600SEric Blake (bat_sectors - 1) << BDRV_SECTOR_BITS, 0); 60774cf6c50SDenis V. Lunev if (ret < 0) { 60874cf6c50SDenis V. Lunev goto exit; 60974cf6c50SDenis V. Lunev } 61074cf6c50SDenis V. Lunev 6111511b490SKevin Wolf ret = 0; 6121511b490SKevin Wolf out: 6131511b490SKevin Wolf blk_unref(blk); 6141511b490SKevin Wolf bdrv_unref(bs); 61574cf6c50SDenis V. Lunev return ret; 61674cf6c50SDenis V. Lunev 61774cf6c50SDenis V. Lunev exit: 61874cf6c50SDenis V. Lunev error_setg_errno(errp, -ret, "Failed to create Parallels image"); 6191511b490SKevin Wolf goto out; 6201511b490SKevin Wolf } 6211511b490SKevin Wolf 622b92902dfSMaxim Levitsky static int coroutine_fn parallels_co_create_opts(BlockDriver *drv, 623b92902dfSMaxim Levitsky const char *filename, 6241511b490SKevin Wolf QemuOpts *opts, 6251511b490SKevin Wolf Error **errp) 6261511b490SKevin Wolf { 6271511b490SKevin Wolf BlockdevCreateOptions *create_options = NULL; 6281511b490SKevin Wolf BlockDriverState *bs = NULL; 62992adf9dbSMarkus Armbruster QDict *qdict; 6301511b490SKevin Wolf Visitor *v; 6311511b490SKevin Wolf int ret; 6321511b490SKevin Wolf 6331511b490SKevin Wolf static const QDictRenames opt_renames[] = { 6341511b490SKevin Wolf { BLOCK_OPT_CLUSTER_SIZE, "cluster-size" }, 6351511b490SKevin Wolf { NULL, NULL }, 6361511b490SKevin Wolf }; 6371511b490SKevin Wolf 6381511b490SKevin Wolf /* Parse options and convert legacy syntax */ 6391511b490SKevin Wolf qdict = qemu_opts_to_qdict_filtered(opts, NULL, ¶llels_create_opts, 6401511b490SKevin Wolf true); 6411511b490SKevin Wolf 6421511b490SKevin Wolf if (!qdict_rename_keys(qdict, opt_renames, errp)) { 6431511b490SKevin Wolf ret = -EINVAL; 64474cf6c50SDenis V. Lunev goto done; 64574cf6c50SDenis V. Lunev } 64674cf6c50SDenis V. Lunev 6471511b490SKevin Wolf /* Create and open the file (protocol layer) */ 648668f62ecSMarkus Armbruster ret = bdrv_create_file(filename, opts, errp); 6491511b490SKevin Wolf if (ret < 0) { 6501511b490SKevin Wolf goto done; 6511511b490SKevin Wolf } 6521511b490SKevin Wolf 6531511b490SKevin Wolf bs = bdrv_open(filename, NULL, NULL, 6541511b490SKevin Wolf BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp); 6551511b490SKevin Wolf if (bs == NULL) { 6561511b490SKevin Wolf ret = -EIO; 6571511b490SKevin Wolf goto done; 6581511b490SKevin Wolf } 6591511b490SKevin Wolf 6601511b490SKevin Wolf /* Now get the QAPI type BlockdevCreateOptions */ 6611511b490SKevin Wolf qdict_put_str(qdict, "driver", "parallels"); 6621511b490SKevin Wolf qdict_put_str(qdict, "file", bs->node_name); 6631511b490SKevin Wolf 664af91062eSMarkus Armbruster v = qobject_input_visitor_new_flat_confused(qdict, errp); 665af91062eSMarkus Armbruster if (!v) { 6661511b490SKevin Wolf ret = -EINVAL; 6671511b490SKevin Wolf goto done; 6681511b490SKevin Wolf } 6691511b490SKevin Wolf 670b11a093cSMarkus Armbruster visit_type_BlockdevCreateOptions(v, NULL, &create_options, errp); 6711511b490SKevin Wolf visit_free(v); 672b11a093cSMarkus Armbruster if (!create_options) { 6731511b490SKevin Wolf ret = -EINVAL; 6741511b490SKevin Wolf goto done; 6751511b490SKevin Wolf } 6761511b490SKevin Wolf 6771511b490SKevin Wolf /* Silently round up sizes */ 6781511b490SKevin Wolf create_options->u.parallels.size = 6791511b490SKevin Wolf ROUND_UP(create_options->u.parallels.size, BDRV_SECTOR_SIZE); 6801511b490SKevin Wolf create_options->u.parallels.cluster_size = 6811511b490SKevin Wolf ROUND_UP(create_options->u.parallels.cluster_size, BDRV_SECTOR_SIZE); 6821511b490SKevin Wolf 6831511b490SKevin Wolf /* Create the Parallels image (format layer) */ 6841511b490SKevin Wolf ret = parallels_co_create(create_options, errp); 6851511b490SKevin Wolf if (ret < 0) { 6861511b490SKevin Wolf goto done; 6871511b490SKevin Wolf } 6881511b490SKevin Wolf ret = 0; 6891511b490SKevin Wolf 6901511b490SKevin Wolf done: 691cb3e7f08SMarc-André Lureau qobject_unref(qdict); 6921511b490SKevin Wolf bdrv_unref(bs); 6931511b490SKevin Wolf qapi_free_BlockdevCreateOptions(create_options); 6941511b490SKevin Wolf return ret; 6951511b490SKevin Wolf } 6961511b490SKevin Wolf 69723d6bd3bSDenis V. Lunev 69823d6bd3bSDenis V. Lunev static int parallels_probe(const uint8_t *buf, int buf_size, 69923d6bd3bSDenis V. Lunev const char *filename) 70023d6bd3bSDenis V. Lunev { 70123d6bd3bSDenis V. Lunev const ParallelsHeader *ph = (const void *)buf; 70223d6bd3bSDenis V. Lunev 70323d6bd3bSDenis V. Lunev if (buf_size < sizeof(ParallelsHeader)) { 70423d6bd3bSDenis V. Lunev return 0; 70523d6bd3bSDenis V. Lunev } 70623d6bd3bSDenis V. Lunev 70723d6bd3bSDenis V. Lunev if ((!memcmp(ph->magic, HEADER_MAGIC, 16) || 70823d6bd3bSDenis V. Lunev !memcmp(ph->magic, HEADER_MAGIC2, 16)) && 70923d6bd3bSDenis V. Lunev (le32_to_cpu(ph->version) == HEADER_VERSION)) { 71023d6bd3bSDenis V. Lunev return 100; 71123d6bd3bSDenis V. Lunev } 71223d6bd3bSDenis V. Lunev 71323d6bd3bSDenis V. Lunev return 0; 71423d6bd3bSDenis V. Lunev } 71523d6bd3bSDenis V. Lunev 7166dd6b9f1SDenis V. Lunev static int parallels_update_header(BlockDriverState *bs) 7176dd6b9f1SDenis V. Lunev { 7186dd6b9f1SDenis V. Lunev BDRVParallelsState *s = bs->opaque; 7199a4f4c31SKevin Wolf unsigned size = MAX(bdrv_opt_mem_align(bs->file->bs), 7209a4f4c31SKevin Wolf sizeof(ParallelsHeader)); 7216dd6b9f1SDenis V. Lunev 7226dd6b9f1SDenis V. Lunev if (size > s->header_size) { 7236dd6b9f1SDenis V. Lunev size = s->header_size; 7246dd6b9f1SDenis V. Lunev } 725d9ca2ea2SKevin Wolf return bdrv_pwrite_sync(bs->file, 0, s->header, size); 7266dd6b9f1SDenis V. Lunev } 7276dd6b9f1SDenis V. Lunev 72823d6bd3bSDenis V. Lunev static int parallels_open(BlockDriverState *bs, QDict *options, int flags, 72923d6bd3bSDenis V. Lunev Error **errp) 73023d6bd3bSDenis V. Lunev { 73123d6bd3bSDenis V. Lunev BDRVParallelsState *s = bs->opaque; 73223d6bd3bSDenis V. Lunev ParallelsHeader ph; 73319f5dc15SDenis V. Lunev int ret, size, i; 734d6179011SDenis V. Lunev QemuOpts *opts = NULL; 735d6179011SDenis V. Lunev Error *local_err = NULL; 736d6179011SDenis V. Lunev char *buf; 73723d6bd3bSDenis V. Lunev 7388b1869daSMax Reitz bs->file = bdrv_open_child(NULL, options, "file", bs, &child_of_bds, 7398b1869daSMax Reitz BDRV_CHILD_IMAGE, false, errp); 7404e4bf5c4SKevin Wolf if (!bs->file) { 7414e4bf5c4SKevin Wolf return -EINVAL; 7424e4bf5c4SKevin Wolf } 7434e4bf5c4SKevin Wolf 744cf2ab8fcSKevin Wolf ret = bdrv_pread(bs->file, 0, &ph, sizeof(ph)); 74523d6bd3bSDenis V. Lunev if (ret < 0) { 74623d6bd3bSDenis V. Lunev goto fail; 74723d6bd3bSDenis V. Lunev } 74823d6bd3bSDenis V. Lunev 74923d6bd3bSDenis V. Lunev bs->total_sectors = le64_to_cpu(ph.nb_sectors); 75023d6bd3bSDenis V. Lunev 75123d6bd3bSDenis V. Lunev if (le32_to_cpu(ph.version) != HEADER_VERSION) { 75223d6bd3bSDenis V. Lunev goto fail_format; 75323d6bd3bSDenis V. Lunev } 75423d6bd3bSDenis V. Lunev if (!memcmp(ph.magic, HEADER_MAGIC, 16)) { 75523d6bd3bSDenis V. Lunev s->off_multiplier = 1; 75623d6bd3bSDenis V. Lunev bs->total_sectors = 0xffffffff & bs->total_sectors; 75723d6bd3bSDenis V. Lunev } else if (!memcmp(ph.magic, HEADER_MAGIC2, 16)) { 75823d6bd3bSDenis V. Lunev s->off_multiplier = le32_to_cpu(ph.tracks); 75923d6bd3bSDenis V. Lunev } else { 76023d6bd3bSDenis V. Lunev goto fail_format; 76123d6bd3bSDenis V. Lunev } 76223d6bd3bSDenis V. Lunev 76323d6bd3bSDenis V. Lunev s->tracks = le32_to_cpu(ph.tracks); 76423d6bd3bSDenis V. Lunev if (s->tracks == 0) { 76523d6bd3bSDenis V. Lunev error_setg(errp, "Invalid image: Zero sectors per track"); 76623d6bd3bSDenis V. Lunev ret = -EINVAL; 76723d6bd3bSDenis V. Lunev goto fail; 76823d6bd3bSDenis V. Lunev } 76923d6bd3bSDenis V. Lunev if (s->tracks > INT32_MAX/513) { 77023d6bd3bSDenis V. Lunev error_setg(errp, "Invalid image: Too big cluster"); 77123d6bd3bSDenis V. Lunev ret = -EFBIG; 77223d6bd3bSDenis V. Lunev goto fail; 77323d6bd3bSDenis V. Lunev } 77423d6bd3bSDenis V. Lunev 77523d6bd3bSDenis V. Lunev s->bat_size = le32_to_cpu(ph.bat_entries); 77623d6bd3bSDenis V. Lunev if (s->bat_size > INT_MAX / sizeof(uint32_t)) { 77723d6bd3bSDenis V. Lunev error_setg(errp, "Catalog too large"); 77823d6bd3bSDenis V. Lunev ret = -EFBIG; 77923d6bd3bSDenis V. Lunev goto fail; 78023d6bd3bSDenis V. Lunev } 78123d6bd3bSDenis V. Lunev 7822d68e22eSDenis V. Lunev size = bat_entry_off(s->bat_size); 7839a4f4c31SKevin Wolf s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file->bs)); 7849a4f4c31SKevin Wolf s->header = qemu_try_blockalign(bs->file->bs, s->header_size); 78523d6bd3bSDenis V. Lunev if (s->header == NULL) { 78623d6bd3bSDenis V. Lunev ret = -ENOMEM; 78723d6bd3bSDenis V. Lunev goto fail; 78823d6bd3bSDenis V. Lunev } 78919f5dc15SDenis V. Lunev s->data_end = le32_to_cpu(ph.data_off); 79019f5dc15SDenis V. Lunev if (s->data_end == 0) { 79119f5dc15SDenis V. Lunev s->data_end = ROUND_UP(bat_entry_off(s->bat_size), BDRV_SECTOR_SIZE); 79219f5dc15SDenis V. Lunev } 79319f5dc15SDenis V. Lunev if (s->data_end < s->header_size) { 79423d6bd3bSDenis V. Lunev /* there is not enough unused space to fit to block align between BAT 79523d6bd3bSDenis V. Lunev and actual data. We can't avoid read-modify-write... */ 79623d6bd3bSDenis V. Lunev s->header_size = size; 79723d6bd3bSDenis V. Lunev } 79823d6bd3bSDenis V. Lunev 799cf2ab8fcSKevin Wolf ret = bdrv_pread(bs->file, 0, s->header, s->header_size); 80023d6bd3bSDenis V. Lunev if (ret < 0) { 80123d6bd3bSDenis V. Lunev goto fail; 80223d6bd3bSDenis V. Lunev } 80323d6bd3bSDenis V. Lunev s->bat_bitmap = (uint32_t *)(s->header + 1); 80423d6bd3bSDenis V. Lunev 80519f5dc15SDenis V. Lunev for (i = 0; i < s->bat_size; i++) { 80619f5dc15SDenis V. Lunev int64_t off = bat2sect(s, i); 80719f5dc15SDenis V. Lunev if (off >= s->data_end) { 80819f5dc15SDenis V. Lunev s->data_end = off + s->tracks; 80919f5dc15SDenis V. Lunev } 81019f5dc15SDenis V. Lunev } 81119f5dc15SDenis V. Lunev 8126dd6b9f1SDenis V. Lunev if (le32_to_cpu(ph.inuse) == HEADER_INUSE_MAGIC) { 8136dd6b9f1SDenis V. Lunev /* Image was not closed correctly. The check is mandatory */ 8146dd6b9f1SDenis V. Lunev s->header_unclean = true; 8156dd6b9f1SDenis V. Lunev if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_CHECK)) { 8166dd6b9f1SDenis V. Lunev error_setg(errp, "parallels: Image was not closed correctly; " 8176dd6b9f1SDenis V. Lunev "cannot be opened read/write"); 8186dd6b9f1SDenis V. Lunev ret = -EACCES; 8196dd6b9f1SDenis V. Lunev goto fail; 8206dd6b9f1SDenis V. Lunev } 8216dd6b9f1SDenis V. Lunev } 8226dd6b9f1SDenis V. Lunev 823c6ecec43SMarkus Armbruster opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, errp); 824c6ecec43SMarkus Armbruster if (!opts) { 825d6179011SDenis V. Lunev goto fail_options; 826d6179011SDenis V. Lunev } 827d6179011SDenis V. Lunev 828a5f9b9dfSMarkus Armbruster if (!qemu_opts_absorb_qdict(opts, options, errp)) { 829d6179011SDenis V. Lunev goto fail_options; 830d6179011SDenis V. Lunev } 831d6179011SDenis V. Lunev 832d6179011SDenis V. Lunev s->prealloc_size = 833d6179011SDenis V. Lunev qemu_opt_get_size_del(opts, PARALLELS_OPT_PREALLOC_SIZE, 0); 834d6179011SDenis V. Lunev s->prealloc_size = MAX(s->tracks, s->prealloc_size >> BDRV_SECTOR_BITS); 835d6179011SDenis V. Lunev buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE); 836bda4cdcbSEric Blake /* prealloc_mode can be downgraded later during allocate_clusters */ 837f7abe0ecSMarc-André Lureau s->prealloc_mode = qapi_enum_parse(&prealloc_mode_lookup, buf, 83806c60b6cSMarkus Armbruster PRL_PREALLOC_MODE_FALLOCATE, 83906c60b6cSMarkus Armbruster &local_err); 840d6179011SDenis V. Lunev g_free(buf); 841d6179011SDenis V. Lunev if (local_err != NULL) { 8424bc6d7eeSMarkus Armbruster error_propagate(errp, local_err); 843d6179011SDenis V. Lunev goto fail_options; 844d6179011SDenis V. Lunev } 845dc62da88SDenis V. Lunev 8466c7d390bSJeff Cody if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_INACTIVE)) { 8476dd6b9f1SDenis V. Lunev s->header->inuse = cpu_to_le32(HEADER_INUSE_MAGIC); 8486dd6b9f1SDenis V. Lunev ret = parallels_update_header(bs); 8496dd6b9f1SDenis V. Lunev if (ret < 0) { 8506dd6b9f1SDenis V. Lunev goto fail; 8516dd6b9f1SDenis V. Lunev } 8526dd6b9f1SDenis V. Lunev } 8536dd6b9f1SDenis V. Lunev 854038adc2fSWei Yang s->bat_dirty_block = 4 * qemu_real_host_page_size; 8550d31c7c2SDenis V. Lunev s->bat_dirty_bmap = 8560d31c7c2SDenis V. Lunev bitmap_new(DIV_ROUND_UP(s->header_size, s->bat_dirty_block)); 8570d31c7c2SDenis V. Lunev 8581d0f37cfSJeff Cody /* Disable migration until bdrv_invalidate_cache method is added */ 8591d0f37cfSJeff Cody error_setg(&s->migration_blocker, "The Parallels format used by node '%s' " 8601d0f37cfSJeff Cody "does not support live migration", 8611d0f37cfSJeff Cody bdrv_get_device_or_node_name(bs)); 862*386f6c07SMarkus Armbruster ret = migrate_add_blocker(s->migration_blocker, errp); 863*386f6c07SMarkus Armbruster if (ret < 0) { 8641d0f37cfSJeff Cody error_free(s->migration_blocker); 8651d0f37cfSJeff Cody goto fail; 8661d0f37cfSJeff Cody } 86723d6bd3bSDenis V. Lunev qemu_co_mutex_init(&s->lock); 86823d6bd3bSDenis V. Lunev return 0; 86923d6bd3bSDenis V. Lunev 87023d6bd3bSDenis V. Lunev fail_format: 87123d6bd3bSDenis V. Lunev error_setg(errp, "Image not in Parallels format"); 8724bc6d7eeSMarkus Armbruster fail_options: 87323d6bd3bSDenis V. Lunev ret = -EINVAL; 87423d6bd3bSDenis V. Lunev fail: 87523d6bd3bSDenis V. Lunev qemu_vfree(s->header); 87623d6bd3bSDenis V. Lunev return ret; 87723d6bd3bSDenis V. Lunev } 87823d6bd3bSDenis V. Lunev 87923d6bd3bSDenis V. Lunev 880019d6b8fSAnthony Liguori static void parallels_close(BlockDriverState *bs) 881019d6b8fSAnthony Liguori { 882019d6b8fSAnthony Liguori BDRVParallelsState *s = bs->opaque; 8836dd6b9f1SDenis V. Lunev 8846c7d390bSJeff Cody if ((bs->open_flags & BDRV_O_RDWR) && !(bs->open_flags & BDRV_O_INACTIVE)) { 8856dd6b9f1SDenis V. Lunev s->header->inuse = 0; 8866dd6b9f1SDenis V. Lunev parallels_update_header(bs); 887e8d04f92SMax Reitz 888e8d04f92SMax Reitz /* errors are ignored, so we might as well pass exact=true */ 889e8d04f92SMax Reitz bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS, true, 8907b8e4857SKevin Wolf PREALLOC_MODE_OFF, 0, NULL); 89119f5dc15SDenis V. Lunev } 89219f5dc15SDenis V. Lunev 8930d31c7c2SDenis V. Lunev g_free(s->bat_dirty_bmap); 8949eae9ccaSDenis V. Lunev qemu_vfree(s->header); 8951d0f37cfSJeff Cody 8961d0f37cfSJeff Cody migrate_del_blocker(s->migration_blocker); 8971d0f37cfSJeff Cody error_free(s->migration_blocker); 898019d6b8fSAnthony Liguori } 899019d6b8fSAnthony Liguori 900019d6b8fSAnthony Liguori static BlockDriver bdrv_parallels = { 901019d6b8fSAnthony Liguori .format_name = "parallels", 902019d6b8fSAnthony Liguori .instance_size = sizeof(BDRVParallelsState), 903019d6b8fSAnthony Liguori .bdrv_probe = parallels_probe, 9041dec5a70SChristoph Hellwig .bdrv_open = parallels_open, 905019d6b8fSAnthony Liguori .bdrv_close = parallels_close, 90669dca43dSMax Reitz .bdrv_child_perm = bdrv_default_perms, 9078e0cf59dSEric Blake .bdrv_co_block_status = parallels_co_block_status, 908d0e61ce5SDenis V. Lunev .bdrv_has_zero_init = bdrv_has_zero_init_1, 9090d31c7c2SDenis V. Lunev .bdrv_co_flush_to_os = parallels_co_flush_to_os, 910481fb9cfSDenis V. Lunev .bdrv_co_readv = parallels_co_readv, 9115a41e1faSDenis V. Lunev .bdrv_co_writev = parallels_co_writev, 912d67066d8SMax Reitz .is_format = true, 913bcbb3866SEdgar Kaziakhmedov .supports_backing = true, 9141511b490SKevin Wolf .bdrv_co_create = parallels_co_create, 915efc75e2aSStefan Hajnoczi .bdrv_co_create_opts = parallels_co_create_opts, 9162fd61638SPaolo Bonzini .bdrv_co_check = parallels_co_check, 91774cf6c50SDenis V. Lunev .create_opts = ¶llels_create_opts, 918019d6b8fSAnthony Liguori }; 919019d6b8fSAnthony Liguori 920019d6b8fSAnthony Liguori static void bdrv_parallels_init(void) 921019d6b8fSAnthony Liguori { 922019d6b8fSAnthony Liguori bdrv_register(&bdrv_parallels); 923019d6b8fSAnthony Liguori } 924019d6b8fSAnthony Liguori 925019d6b8fSAnthony Liguori block_init(bdrv_parallels_init); 926