1019d6b8fSAnthony Liguori /* 2019d6b8fSAnthony Liguori * Block driver for the VMDK format 3019d6b8fSAnthony Liguori * 4019d6b8fSAnthony Liguori * Copyright (c) 2004 Fabrice Bellard 5019d6b8fSAnthony Liguori * Copyright (c) 2005 Filip Navara 6019d6b8fSAnthony Liguori * 7019d6b8fSAnthony Liguori * Permission is hereby granted, free of charge, to any person obtaining a copy 8019d6b8fSAnthony Liguori * of this software and associated documentation files (the "Software"), to deal 9019d6b8fSAnthony Liguori * in the Software without restriction, including without limitation the rights 10019d6b8fSAnthony Liguori * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11019d6b8fSAnthony Liguori * copies of the Software, and to permit persons to whom the Software is 12019d6b8fSAnthony Liguori * furnished to do so, subject to the following conditions: 13019d6b8fSAnthony Liguori * 14019d6b8fSAnthony Liguori * The above copyright notice and this permission notice shall be included in 15019d6b8fSAnthony Liguori * all copies or substantial portions of the Software. 16019d6b8fSAnthony Liguori * 17019d6b8fSAnthony Liguori * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18019d6b8fSAnthony Liguori * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19019d6b8fSAnthony Liguori * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20019d6b8fSAnthony Liguori * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21019d6b8fSAnthony Liguori * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22019d6b8fSAnthony Liguori * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23019d6b8fSAnthony Liguori * THE SOFTWARE. 24019d6b8fSAnthony Liguori */ 25019d6b8fSAnthony Liguori 2680c71a24SPeter Maydell #include "qemu/osdep.h" 27da34e65cSMarkus Armbruster #include "qapi/error.h" 28737e150eSPaolo Bonzini #include "block/block_int.h" 29c4bea169SKevin Wolf #include "sysemu/block-backend.h" 30cc7a8ea7SMarkus Armbruster #include "qapi/qmp/qerror.h" 31d49b6836SMarkus Armbruster #include "qemu/error-report.h" 321de7afc9SPaolo Bonzini #include "qemu/module.h" 3358369e22SPaolo Bonzini #include "qemu/bswap.h" 34caf71f86SPaolo Bonzini #include "migration/migration.h" 35f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 362923d34fSStefan Weil #include <zlib.h> 37019d6b8fSAnthony Liguori 38019d6b8fSAnthony Liguori #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') 39019d6b8fSAnthony Liguori #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') 40432bb170SFam Zheng #define VMDK4_COMPRESSION_DEFLATE 1 4195b0aa42SFam Zheng #define VMDK4_FLAG_NL_DETECT (1 << 0) 42bb45ded9SFam Zheng #define VMDK4_FLAG_RGD (1 << 1) 4314ead646SFam Zheng /* Zeroed-grain enable bit */ 4414ead646SFam Zheng #define VMDK4_FLAG_ZERO_GRAIN (1 << 2) 45432bb170SFam Zheng #define VMDK4_FLAG_COMPRESS (1 << 16) 46432bb170SFam Zheng #define VMDK4_FLAG_MARKER (1 << 17) 4765bd155cSKevin Wolf #define VMDK4_GD_AT_END 0xffffffffffffffffULL 48019d6b8fSAnthony Liguori 4914ead646SFam Zheng #define VMDK_GTE_ZEROED 0x1 5065f74725SFam Zheng 5165f74725SFam Zheng /* VMDK internal error codes */ 5265f74725SFam Zheng #define VMDK_OK 0 5365f74725SFam Zheng #define VMDK_ERROR (-1) 5465f74725SFam Zheng /* Cluster not allocated */ 5565f74725SFam Zheng #define VMDK_UNALLOC (-2) 5665f74725SFam Zheng #define VMDK_ZEROED (-3) 5765f74725SFam Zheng 5869e0b6dfSFam Zheng #define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain" 5969e0b6dfSFam Zheng 60019d6b8fSAnthony Liguori typedef struct { 61019d6b8fSAnthony Liguori uint32_t version; 62019d6b8fSAnthony Liguori uint32_t flags; 63019d6b8fSAnthony Liguori uint32_t disk_sectors; 64019d6b8fSAnthony Liguori uint32_t granularity; 65019d6b8fSAnthony Liguori uint32_t l1dir_offset; 66019d6b8fSAnthony Liguori uint32_t l1dir_size; 67019d6b8fSAnthony Liguori uint32_t file_sectors; 68019d6b8fSAnthony Liguori uint32_t cylinders; 69019d6b8fSAnthony Liguori uint32_t heads; 70019d6b8fSAnthony Liguori uint32_t sectors_per_track; 715d8caa54SFam Zheng } QEMU_PACKED VMDK3Header; 72019d6b8fSAnthony Liguori 73019d6b8fSAnthony Liguori typedef struct { 74019d6b8fSAnthony Liguori uint32_t version; 75019d6b8fSAnthony Liguori uint32_t flags; 76e98768d4SFam Zheng uint64_t capacity; 77e98768d4SFam Zheng uint64_t granularity; 78e98768d4SFam Zheng uint64_t desc_offset; 79e98768d4SFam Zheng uint64_t desc_size; 80ca8804ceSFam Zheng /* Number of GrainTableEntries per GrainTable */ 81ca8804ceSFam Zheng uint32_t num_gtes_per_gt; 82e98768d4SFam Zheng uint64_t rgd_offset; 83e98768d4SFam Zheng uint64_t gd_offset; 84e98768d4SFam Zheng uint64_t grain_offset; 85019d6b8fSAnthony Liguori char filler[1]; 86019d6b8fSAnthony Liguori char check_bytes[4]; 87432bb170SFam Zheng uint16_t compressAlgorithm; 88541dc0d4SStefan Weil } QEMU_PACKED VMDK4Header; 89019d6b8fSAnthony Liguori 90019d6b8fSAnthony Liguori #define L2_CACHE_SIZE 16 91019d6b8fSAnthony Liguori 92b3976d3cSFam Zheng typedef struct VmdkExtent { 9324bc15d1SKevin Wolf BdrvChild *file; 94b3976d3cSFam Zheng bool flat; 95432bb170SFam Zheng bool compressed; 96432bb170SFam Zheng bool has_marker; 9714ead646SFam Zheng bool has_zero_grain; 9814ead646SFam Zheng int version; 99b3976d3cSFam Zheng int64_t sectors; 100b3976d3cSFam Zheng int64_t end_sector; 1017fa60fa3SFam Zheng int64_t flat_start_offset; 102019d6b8fSAnthony Liguori int64_t l1_table_offset; 103019d6b8fSAnthony Liguori int64_t l1_backup_table_offset; 104019d6b8fSAnthony Liguori uint32_t *l1_table; 105019d6b8fSAnthony Liguori uint32_t *l1_backup_table; 106019d6b8fSAnthony Liguori unsigned int l1_size; 107019d6b8fSAnthony Liguori uint32_t l1_entry_sectors; 108019d6b8fSAnthony Liguori 109019d6b8fSAnthony Liguori unsigned int l2_size; 110019d6b8fSAnthony Liguori uint32_t *l2_cache; 111019d6b8fSAnthony Liguori uint32_t l2_cache_offsets[L2_CACHE_SIZE]; 112019d6b8fSAnthony Liguori uint32_t l2_cache_counts[L2_CACHE_SIZE]; 113019d6b8fSAnthony Liguori 114301c7d38SFam Zheng int64_t cluster_sectors; 115c6ac36e1SFam Zheng int64_t next_cluster_sector; 116f4c129a3SFam Zheng char *type; 117b3976d3cSFam Zheng } VmdkExtent; 118b3976d3cSFam Zheng 119b3976d3cSFam Zheng typedef struct BDRVVmdkState { 120848c66e8SPaolo Bonzini CoMutex lock; 121e98768d4SFam Zheng uint64_t desc_offset; 12269b4d86dSFam Zheng bool cid_updated; 123c338b6adSFam Zheng bool cid_checked; 124f4c129a3SFam Zheng uint32_t cid; 125019d6b8fSAnthony Liguori uint32_t parent_cid; 126b3976d3cSFam Zheng int num_extents; 127b3976d3cSFam Zheng /* Extent array with num_extents entries, ascend ordered by address */ 128b3976d3cSFam Zheng VmdkExtent *extents; 1292bc3166cSKevin Wolf Error *migration_blocker; 130f4c129a3SFam Zheng char *create_type; 131019d6b8fSAnthony Liguori } BDRVVmdkState; 132019d6b8fSAnthony Liguori 133019d6b8fSAnthony Liguori typedef struct VmdkMetaData { 134019d6b8fSAnthony Liguori unsigned int l1_index; 135019d6b8fSAnthony Liguori unsigned int l2_index; 136019d6b8fSAnthony Liguori unsigned int l2_offset; 137019d6b8fSAnthony Liguori int valid; 138cdeaf1f1SFam Zheng uint32_t *l2_cache_entry; 139019d6b8fSAnthony Liguori } VmdkMetaData; 140019d6b8fSAnthony Liguori 141432bb170SFam Zheng typedef struct VmdkGrainMarker { 142432bb170SFam Zheng uint64_t lba; 143432bb170SFam Zheng uint32_t size; 144432bb170SFam Zheng uint8_t data[0]; 1455d8caa54SFam Zheng } QEMU_PACKED VmdkGrainMarker; 146432bb170SFam Zheng 14765bd155cSKevin Wolf enum { 14865bd155cSKevin Wolf MARKER_END_OF_STREAM = 0, 14965bd155cSKevin Wolf MARKER_GRAIN_TABLE = 1, 15065bd155cSKevin Wolf MARKER_GRAIN_DIRECTORY = 2, 15165bd155cSKevin Wolf MARKER_FOOTER = 3, 15265bd155cSKevin Wolf }; 15365bd155cSKevin Wolf 154019d6b8fSAnthony Liguori static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) 155019d6b8fSAnthony Liguori { 156019d6b8fSAnthony Liguori uint32_t magic; 157019d6b8fSAnthony Liguori 158ae261c86SFam Zheng if (buf_size < 4) { 159019d6b8fSAnthony Liguori return 0; 160ae261c86SFam Zheng } 161019d6b8fSAnthony Liguori magic = be32_to_cpu(*(uint32_t *)buf); 162019d6b8fSAnthony Liguori if (magic == VMDK3_MAGIC || 16301fc99d6SFam Zheng magic == VMDK4_MAGIC) { 164019d6b8fSAnthony Liguori return 100; 16501fc99d6SFam Zheng } else { 16601fc99d6SFam Zheng const char *p = (const char *)buf; 16701fc99d6SFam Zheng const char *end = p + buf_size; 16801fc99d6SFam Zheng while (p < end) { 16901fc99d6SFam Zheng if (*p == '#') { 17001fc99d6SFam Zheng /* skip comment line */ 17101fc99d6SFam Zheng while (p < end && *p != '\n') { 17201fc99d6SFam Zheng p++; 17301fc99d6SFam Zheng } 17401fc99d6SFam Zheng p++; 17501fc99d6SFam Zheng continue; 17601fc99d6SFam Zheng } 17701fc99d6SFam Zheng if (*p == ' ') { 17801fc99d6SFam Zheng while (p < end && *p == ' ') { 17901fc99d6SFam Zheng p++; 18001fc99d6SFam Zheng } 18101fc99d6SFam Zheng /* skip '\r' if windows line endings used. */ 18201fc99d6SFam Zheng if (p < end && *p == '\r') { 18301fc99d6SFam Zheng p++; 18401fc99d6SFam Zheng } 18501fc99d6SFam Zheng /* only accept blank lines before 'version=' line */ 18601fc99d6SFam Zheng if (p == end || *p != '\n') { 187019d6b8fSAnthony Liguori return 0; 188019d6b8fSAnthony Liguori } 18901fc99d6SFam Zheng p++; 19001fc99d6SFam Zheng continue; 19101fc99d6SFam Zheng } 19201fc99d6SFam Zheng if (end - p >= strlen("version=X\n")) { 19301fc99d6SFam Zheng if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || 19401fc99d6SFam Zheng strncmp("version=2\n", p, strlen("version=2\n")) == 0) { 19501fc99d6SFam Zheng return 100; 19601fc99d6SFam Zheng } 19701fc99d6SFam Zheng } 19801fc99d6SFam Zheng if (end - p >= strlen("version=X\r\n")) { 19901fc99d6SFam Zheng if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || 20001fc99d6SFam Zheng strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { 20101fc99d6SFam Zheng return 100; 20201fc99d6SFam Zheng } 20301fc99d6SFam Zheng } 20401fc99d6SFam Zheng return 0; 20501fc99d6SFam Zheng } 20601fc99d6SFam Zheng return 0; 20701fc99d6SFam Zheng } 20801fc99d6SFam Zheng } 209019d6b8fSAnthony Liguori 210019d6b8fSAnthony Liguori #define SECTOR_SIZE 512 211f66fd6c3SFam Zheng #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ 212f66fd6c3SFam Zheng #define BUF_SIZE 4096 213f66fd6c3SFam Zheng #define HEADER_SIZE 512 /* first sector of 512 bytes */ 214019d6b8fSAnthony Liguori 215b3976d3cSFam Zheng static void vmdk_free_extents(BlockDriverState *bs) 216b3976d3cSFam Zheng { 217b3976d3cSFam Zheng int i; 218b3976d3cSFam Zheng BDRVVmdkState *s = bs->opaque; 219b3c0bfb6SFam Zheng VmdkExtent *e; 220b3976d3cSFam Zheng 221b3976d3cSFam Zheng for (i = 0; i < s->num_extents; i++) { 222b3c0bfb6SFam Zheng e = &s->extents[i]; 223b3c0bfb6SFam Zheng g_free(e->l1_table); 224b3c0bfb6SFam Zheng g_free(e->l2_cache); 225b3c0bfb6SFam Zheng g_free(e->l1_backup_table); 226f4c129a3SFam Zheng g_free(e->type); 2279a4f4c31SKevin Wolf if (e->file != bs->file) { 22824bc15d1SKevin Wolf bdrv_unref_child(bs, e->file); 229b3c0bfb6SFam Zheng } 230b3976d3cSFam Zheng } 2317267c094SAnthony Liguori g_free(s->extents); 232b3976d3cSFam Zheng } 233b3976d3cSFam Zheng 23486c6b429SFam Zheng static void vmdk_free_last_extent(BlockDriverState *bs) 23586c6b429SFam Zheng { 23686c6b429SFam Zheng BDRVVmdkState *s = bs->opaque; 23786c6b429SFam Zheng 23886c6b429SFam Zheng if (s->num_extents == 0) { 23986c6b429SFam Zheng return; 24086c6b429SFam Zheng } 24186c6b429SFam Zheng s->num_extents--; 2425839e53bSMarkus Armbruster s->extents = g_renew(VmdkExtent, s->extents, s->num_extents); 24386c6b429SFam Zheng } 24486c6b429SFam Zheng 245019d6b8fSAnthony Liguori static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) 246019d6b8fSAnthony Liguori { 2475997c210SFam Zheng char *desc; 2488379e46dSPavel Borzenkov uint32_t cid = 0xffffffff; 249019d6b8fSAnthony Liguori const char *p_name, *cid_str; 250019d6b8fSAnthony Liguori size_t cid_str_size; 251e1da9b24SFam Zheng BDRVVmdkState *s = bs->opaque; 25299f1835dSKevin Wolf int ret; 253019d6b8fSAnthony Liguori 2545997c210SFam Zheng desc = g_malloc0(DESC_SIZE); 255cf2ab8fcSKevin Wolf ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); 25699f1835dSKevin Wolf if (ret < 0) { 2575997c210SFam Zheng g_free(desc); 258019d6b8fSAnthony Liguori return 0; 259e1da9b24SFam Zheng } 260019d6b8fSAnthony Liguori 261019d6b8fSAnthony Liguori if (parent) { 262019d6b8fSAnthony Liguori cid_str = "parentCID"; 263019d6b8fSAnthony Liguori cid_str_size = sizeof("parentCID"); 264019d6b8fSAnthony Liguori } else { 265019d6b8fSAnthony Liguori cid_str = "CID"; 266019d6b8fSAnthony Liguori cid_str_size = sizeof("CID"); 267019d6b8fSAnthony Liguori } 268019d6b8fSAnthony Liguori 26993897b9fSKevin Wolf desc[DESC_SIZE - 1] = '\0'; 270ae261c86SFam Zheng p_name = strstr(desc, cid_str); 271ae261c86SFam Zheng if (p_name != NULL) { 272019d6b8fSAnthony Liguori p_name += cid_str_size; 2739b17031aSFam Zheng sscanf(p_name, "%" SCNx32, &cid); 274019d6b8fSAnthony Liguori } 275019d6b8fSAnthony Liguori 2765997c210SFam Zheng g_free(desc); 277019d6b8fSAnthony Liguori return cid; 278019d6b8fSAnthony Liguori } 279019d6b8fSAnthony Liguori 280019d6b8fSAnthony Liguori static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) 281019d6b8fSAnthony Liguori { 282965415ebSFam Zheng char *desc, *tmp_desc; 283019d6b8fSAnthony Liguori char *p_name, *tmp_str; 284e1da9b24SFam Zheng BDRVVmdkState *s = bs->opaque; 285965415ebSFam Zheng int ret = 0; 286019d6b8fSAnthony Liguori 287965415ebSFam Zheng desc = g_malloc0(DESC_SIZE); 288965415ebSFam Zheng tmp_desc = g_malloc0(DESC_SIZE); 289cf2ab8fcSKevin Wolf ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); 29099f1835dSKevin Wolf if (ret < 0) { 291965415ebSFam Zheng goto out; 292e1da9b24SFam Zheng } 293019d6b8fSAnthony Liguori 29493897b9fSKevin Wolf desc[DESC_SIZE - 1] = '\0'; 295019d6b8fSAnthony Liguori tmp_str = strstr(desc, "parentCID"); 29693897b9fSKevin Wolf if (tmp_str == NULL) { 297965415ebSFam Zheng ret = -EINVAL; 298965415ebSFam Zheng goto out; 29993897b9fSKevin Wolf } 30093897b9fSKevin Wolf 301965415ebSFam Zheng pstrcpy(tmp_desc, DESC_SIZE, tmp_str); 302ae261c86SFam Zheng p_name = strstr(desc, "CID"); 303ae261c86SFam Zheng if (p_name != NULL) { 304019d6b8fSAnthony Liguori p_name += sizeof("CID"); 305965415ebSFam Zheng snprintf(p_name, DESC_SIZE - (p_name - desc), "%" PRIx32 "\n", cid); 306965415ebSFam Zheng pstrcat(desc, DESC_SIZE, tmp_desc); 307019d6b8fSAnthony Liguori } 308019d6b8fSAnthony Liguori 309d9ca2ea2SKevin Wolf ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE); 31099f1835dSKevin Wolf 311965415ebSFam Zheng out: 312965415ebSFam Zheng g_free(desc); 313965415ebSFam Zheng g_free(tmp_desc); 314965415ebSFam Zheng return ret; 315019d6b8fSAnthony Liguori } 316019d6b8fSAnthony Liguori 317019d6b8fSAnthony Liguori static int vmdk_is_cid_valid(BlockDriverState *bs) 318019d6b8fSAnthony Liguori { 319019d6b8fSAnthony Liguori BDRVVmdkState *s = bs->opaque; 320019d6b8fSAnthony Liguori uint32_t cur_pcid; 321019d6b8fSAnthony Liguori 322760e0063SKevin Wolf if (!s->cid_checked && bs->backing) { 323760e0063SKevin Wolf BlockDriverState *p_bs = bs->backing->bs; 324760e0063SKevin Wolf 325019d6b8fSAnthony Liguori cur_pcid = vmdk_read_cid(p_bs, 0); 326ae261c86SFam Zheng if (s->parent_cid != cur_pcid) { 327ae261c86SFam Zheng /* CID not valid */ 328019d6b8fSAnthony Liguori return 0; 329019d6b8fSAnthony Liguori } 330ae261c86SFam Zheng } 331c338b6adSFam Zheng s->cid_checked = true; 332ae261c86SFam Zheng /* CID valid */ 333019d6b8fSAnthony Liguori return 1; 334019d6b8fSAnthony Liguori } 335019d6b8fSAnthony Liguori 33667251a31SKevin Wolf /* We have nothing to do for VMDK reopen, stubs just return success */ 3373897575fSJeff Cody static int vmdk_reopen_prepare(BDRVReopenState *state, 3383897575fSJeff Cody BlockReopenQueue *queue, Error **errp) 3393897575fSJeff Cody { 3403897575fSJeff Cody assert(state != NULL); 3413897575fSJeff Cody assert(state->bs != NULL); 34267251a31SKevin Wolf return 0; 3433897575fSJeff Cody } 3443897575fSJeff Cody 3459949f97eSKevin Wolf static int vmdk_parent_open(BlockDriverState *bs) 346019d6b8fSAnthony Liguori { 347019d6b8fSAnthony Liguori char *p_name; 34871968dbfSFam Zheng char *desc; 349e1da9b24SFam Zheng BDRVVmdkState *s = bs->opaque; 350588b65a3SPaolo Bonzini int ret; 351019d6b8fSAnthony Liguori 35271968dbfSFam Zheng desc = g_malloc0(DESC_SIZE + 1); 353cf2ab8fcSKevin Wolf ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); 354588b65a3SPaolo Bonzini if (ret < 0) { 35571968dbfSFam Zheng goto out; 356e1da9b24SFam Zheng } 35771968dbfSFam Zheng ret = 0; 358019d6b8fSAnthony Liguori 359ae261c86SFam Zheng p_name = strstr(desc, "parentFileNameHint"); 360ae261c86SFam Zheng if (p_name != NULL) { 361019d6b8fSAnthony Liguori char *end_name; 362019d6b8fSAnthony Liguori 363019d6b8fSAnthony Liguori p_name += sizeof("parentFileNameHint") + 1; 364ae261c86SFam Zheng end_name = strchr(p_name, '\"'); 365ae261c86SFam Zheng if (end_name == NULL) { 36671968dbfSFam Zheng ret = -EINVAL; 36771968dbfSFam Zheng goto out; 368ae261c86SFam Zheng } 369ae261c86SFam Zheng if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { 37071968dbfSFam Zheng ret = -EINVAL; 37171968dbfSFam Zheng goto out; 372ae261c86SFam Zheng } 373019d6b8fSAnthony Liguori 374b171271aSKevin Wolf pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); 375019d6b8fSAnthony Liguori } 376019d6b8fSAnthony Liguori 37771968dbfSFam Zheng out: 37871968dbfSFam Zheng g_free(desc); 37971968dbfSFam Zheng return ret; 380019d6b8fSAnthony Liguori } 381019d6b8fSAnthony Liguori 382b3976d3cSFam Zheng /* Create and append extent to the extent array. Return the added VmdkExtent 383b3976d3cSFam Zheng * address. return NULL if allocation failed. */ 3848aa1331cSFam Zheng static int vmdk_add_extent(BlockDriverState *bs, 38524bc15d1SKevin Wolf BdrvChild *file, bool flat, int64_t sectors, 386b3976d3cSFam Zheng int64_t l1_offset, int64_t l1_backup_offset, 387b3976d3cSFam Zheng uint32_t l1_size, 3888aa1331cSFam Zheng int l2_size, uint64_t cluster_sectors, 3894823970bSFam Zheng VmdkExtent **new_extent, 3904823970bSFam Zheng Error **errp) 391b3976d3cSFam Zheng { 392b3976d3cSFam Zheng VmdkExtent *extent; 393b3976d3cSFam Zheng BDRVVmdkState *s = bs->opaque; 3940a156f7cSMarkus Armbruster int64_t nb_sectors; 395b3976d3cSFam Zheng 3968aa1331cSFam Zheng if (cluster_sectors > 0x200000) { 3978aa1331cSFam Zheng /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */ 3984823970bSFam Zheng error_setg(errp, "Invalid granularity, image may be corrupt"); 3994823970bSFam Zheng return -EFBIG; 4008aa1331cSFam Zheng } 401b0651b8cSFam Zheng if (l1_size > 512 * 1024 * 1024) { 402b0651b8cSFam Zheng /* Although with big capacity and small l1_entry_sectors, we can get a 403b0651b8cSFam Zheng * big l1_size, we don't want unbounded value to allocate the table. 404b0651b8cSFam Zheng * Limit it to 512M, which is 16PB for default cluster and L2 table 405b0651b8cSFam Zheng * size */ 4064823970bSFam Zheng error_setg(errp, "L1 size too big"); 407b0651b8cSFam Zheng return -EFBIG; 408b0651b8cSFam Zheng } 4098aa1331cSFam Zheng 41024bc15d1SKevin Wolf nb_sectors = bdrv_nb_sectors(file->bs); 4110a156f7cSMarkus Armbruster if (nb_sectors < 0) { 4120a156f7cSMarkus Armbruster return nb_sectors; 413c6ac36e1SFam Zheng } 414c6ac36e1SFam Zheng 4155839e53bSMarkus Armbruster s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1); 416b3976d3cSFam Zheng extent = &s->extents[s->num_extents]; 417b3976d3cSFam Zheng s->num_extents++; 418b3976d3cSFam Zheng 419b3976d3cSFam Zheng memset(extent, 0, sizeof(VmdkExtent)); 420b3976d3cSFam Zheng extent->file = file; 421b3976d3cSFam Zheng extent->flat = flat; 422b3976d3cSFam Zheng extent->sectors = sectors; 423b3976d3cSFam Zheng extent->l1_table_offset = l1_offset; 424b3976d3cSFam Zheng extent->l1_backup_table_offset = l1_backup_offset; 425b3976d3cSFam Zheng extent->l1_size = l1_size; 426b3976d3cSFam Zheng extent->l1_entry_sectors = l2_size * cluster_sectors; 427b3976d3cSFam Zheng extent->l2_size = l2_size; 428301c7d38SFam Zheng extent->cluster_sectors = flat ? sectors : cluster_sectors; 4290a156f7cSMarkus Armbruster extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors); 430b3976d3cSFam Zheng 431b3976d3cSFam Zheng if (s->num_extents > 1) { 432b3976d3cSFam Zheng extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; 433b3976d3cSFam Zheng } else { 434b3976d3cSFam Zheng extent->end_sector = extent->sectors; 435b3976d3cSFam Zheng } 436b3976d3cSFam Zheng bs->total_sectors = extent->end_sector; 4378aa1331cSFam Zheng if (new_extent) { 4388aa1331cSFam Zheng *new_extent = extent; 4398aa1331cSFam Zheng } 4408aa1331cSFam Zheng return 0; 441b3976d3cSFam Zheng } 442b3976d3cSFam Zheng 4434823970bSFam Zheng static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, 4444823970bSFam Zheng Error **errp) 445019d6b8fSAnthony Liguori { 446b4b3ab14SFam Zheng int ret; 44713c4941cSFam Zheng size_t l1_size; 44813c4941cSFam Zheng int i; 449b4b3ab14SFam Zheng 450b4b3ab14SFam Zheng /* read the L1 table */ 451b4b3ab14SFam Zheng l1_size = extent->l1_size * sizeof(uint32_t); 452d6e59931SKevin Wolf extent->l1_table = g_try_malloc(l1_size); 453d6e59931SKevin Wolf if (l1_size && extent->l1_table == NULL) { 454d6e59931SKevin Wolf return -ENOMEM; 455d6e59931SKevin Wolf } 456d6e59931SKevin Wolf 457cf2ab8fcSKevin Wolf ret = bdrv_pread(extent->file, 458b4b3ab14SFam Zheng extent->l1_table_offset, 459b4b3ab14SFam Zheng extent->l1_table, 460b4b3ab14SFam Zheng l1_size); 461b4b3ab14SFam Zheng if (ret < 0) { 4624823970bSFam Zheng error_setg_errno(errp, -ret, 4634823970bSFam Zheng "Could not read l1 table from extent '%s'", 46424bc15d1SKevin Wolf extent->file->bs->filename); 465b4b3ab14SFam Zheng goto fail_l1; 466b4b3ab14SFam Zheng } 467b4b3ab14SFam Zheng for (i = 0; i < extent->l1_size; i++) { 468b4b3ab14SFam Zheng le32_to_cpus(&extent->l1_table[i]); 469b4b3ab14SFam Zheng } 470b4b3ab14SFam Zheng 471b4b3ab14SFam Zheng if (extent->l1_backup_table_offset) { 472d6e59931SKevin Wolf extent->l1_backup_table = g_try_malloc(l1_size); 473d6e59931SKevin Wolf if (l1_size && extent->l1_backup_table == NULL) { 474d6e59931SKevin Wolf ret = -ENOMEM; 475d6e59931SKevin Wolf goto fail_l1; 476d6e59931SKevin Wolf } 477cf2ab8fcSKevin Wolf ret = bdrv_pread(extent->file, 478b4b3ab14SFam Zheng extent->l1_backup_table_offset, 479b4b3ab14SFam Zheng extent->l1_backup_table, 480b4b3ab14SFam Zheng l1_size); 481b4b3ab14SFam Zheng if (ret < 0) { 4824823970bSFam Zheng error_setg_errno(errp, -ret, 4834823970bSFam Zheng "Could not read l1 backup table from extent '%s'", 48424bc15d1SKevin Wolf extent->file->bs->filename); 485b4b3ab14SFam Zheng goto fail_l1b; 486b4b3ab14SFam Zheng } 487b4b3ab14SFam Zheng for (i = 0; i < extent->l1_size; i++) { 488b4b3ab14SFam Zheng le32_to_cpus(&extent->l1_backup_table[i]); 489b4b3ab14SFam Zheng } 490b4b3ab14SFam Zheng } 491b4b3ab14SFam Zheng 492b4b3ab14SFam Zheng extent->l2_cache = 4935839e53bSMarkus Armbruster g_new(uint32_t, extent->l2_size * L2_CACHE_SIZE); 494b4b3ab14SFam Zheng return 0; 495b4b3ab14SFam Zheng fail_l1b: 4967267c094SAnthony Liguori g_free(extent->l1_backup_table); 497b4b3ab14SFam Zheng fail_l1: 4987267c094SAnthony Liguori g_free(extent->l1_table); 499b4b3ab14SFam Zheng return ret; 500b4b3ab14SFam Zheng } 501b4b3ab14SFam Zheng 502daac8fdcSFam Zheng static int vmdk_open_vmfs_sparse(BlockDriverState *bs, 50324bc15d1SKevin Wolf BdrvChild *file, 5044823970bSFam Zheng int flags, Error **errp) 505b4b3ab14SFam Zheng { 506b4b3ab14SFam Zheng int ret; 507019d6b8fSAnthony Liguori uint32_t magic; 508019d6b8fSAnthony Liguori VMDK3Header header; 509b4b3ab14SFam Zheng VmdkExtent *extent; 510b4b3ab14SFam Zheng 511cf2ab8fcSKevin Wolf ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); 512b4b3ab14SFam Zheng if (ret < 0) { 5134823970bSFam Zheng error_setg_errno(errp, -ret, 5144823970bSFam Zheng "Could not read header from file '%s'", 51524bc15d1SKevin Wolf file->bs->filename); 51686c6b429SFam Zheng return ret; 517b3976d3cSFam Zheng } 518f6b61e54SFam Zheng ret = vmdk_add_extent(bs, file, false, 519b3976d3cSFam Zheng le32_to_cpu(header.disk_sectors), 5207237aecdSFam Zheng (int64_t)le32_to_cpu(header.l1dir_offset) << 9, 521f6b61e54SFam Zheng 0, 522f6b61e54SFam Zheng le32_to_cpu(header.l1dir_size), 523f6b61e54SFam Zheng 4096, 5248aa1331cSFam Zheng le32_to_cpu(header.granularity), 5254823970bSFam Zheng &extent, 5264823970bSFam Zheng errp); 5278aa1331cSFam Zheng if (ret < 0) { 5288aa1331cSFam Zheng return ret; 5298aa1331cSFam Zheng } 5304823970bSFam Zheng ret = vmdk_init_tables(bs, extent, errp); 531b4b3ab14SFam Zheng if (ret) { 53286c6b429SFam Zheng /* free extent allocated by vmdk_add_extent */ 53386c6b429SFam Zheng vmdk_free_last_extent(bs); 534b4b3ab14SFam Zheng } 535b4b3ab14SFam Zheng return ret; 536b4b3ab14SFam Zheng } 537b4b3ab14SFam Zheng 538d1833ef5SPaolo Bonzini static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, 539a6468367SKevin Wolf QDict *options, Error **errp); 540f16f509dSFam Zheng 541cf2ab8fcSKevin Wolf static char *vmdk_read_desc(BdrvChild *file, uint64_t desc_offset, Error **errp) 542a8842e6dSPaolo Bonzini { 543a8842e6dSPaolo Bonzini int64_t size; 544a8842e6dSPaolo Bonzini char *buf; 545a8842e6dSPaolo Bonzini int ret; 546a8842e6dSPaolo Bonzini 547cf2ab8fcSKevin Wolf size = bdrv_getlength(file->bs); 548a8842e6dSPaolo Bonzini if (size < 0) { 549a8842e6dSPaolo Bonzini error_setg_errno(errp, -size, "Could not access file"); 550a8842e6dSPaolo Bonzini return NULL; 551a8842e6dSPaolo Bonzini } 552a8842e6dSPaolo Bonzini 55303c3359dSFam Zheng if (size < 4) { 55403c3359dSFam Zheng /* Both descriptor file and sparse image must be much larger than 4 55503c3359dSFam Zheng * bytes, also callers of vmdk_read_desc want to compare the first 4 55603c3359dSFam Zheng * bytes with VMDK4_MAGIC, let's error out if less is read. */ 55703c3359dSFam Zheng error_setg(errp, "File is too small, not a valid image"); 55803c3359dSFam Zheng return NULL; 55903c3359dSFam Zheng } 56003c3359dSFam Zheng 56173b7bcadSFam Zheng size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */ 56273b7bcadSFam Zheng buf = g_malloc(size + 1); 563a8842e6dSPaolo Bonzini 564a8842e6dSPaolo Bonzini ret = bdrv_pread(file, desc_offset, buf, size); 565a8842e6dSPaolo Bonzini if (ret < 0) { 566a8842e6dSPaolo Bonzini error_setg_errno(errp, -ret, "Could not read from file"); 567a8842e6dSPaolo Bonzini g_free(buf); 568a8842e6dSPaolo Bonzini return NULL; 569a8842e6dSPaolo Bonzini } 57073b7bcadSFam Zheng buf[ret] = 0; 571a8842e6dSPaolo Bonzini 572a8842e6dSPaolo Bonzini return buf; 573a8842e6dSPaolo Bonzini } 574a8842e6dSPaolo Bonzini 57586c6b429SFam Zheng static int vmdk_open_vmdk4(BlockDriverState *bs, 57624bc15d1SKevin Wolf BdrvChild *file, 577a6468367SKevin Wolf int flags, QDict *options, Error **errp) 578b4b3ab14SFam Zheng { 579b4b3ab14SFam Zheng int ret; 580b4b3ab14SFam Zheng uint32_t magic; 581b4b3ab14SFam Zheng uint32_t l1_size, l1_entry_sectors; 582019d6b8fSAnthony Liguori VMDK4Header header; 583b4b3ab14SFam Zheng VmdkExtent *extent; 584f4c129a3SFam Zheng BDRVVmdkState *s = bs->opaque; 585bb45ded9SFam Zheng int64_t l1_backup_offset = 0; 5863db1d98aSFam Zheng bool compressed; 587b4b3ab14SFam Zheng 588cf2ab8fcSKevin Wolf ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); 589b4b3ab14SFam Zheng if (ret < 0) { 5904823970bSFam Zheng error_setg_errno(errp, -ret, 5914823970bSFam Zheng "Could not read header from file '%s'", 59224bc15d1SKevin Wolf file->bs->filename); 59389ac8480SPaolo Bonzini return -EINVAL; 594b3976d3cSFam Zheng } 5955a394b9eSStefan Hajnoczi if (header.capacity == 0) { 596e98768d4SFam Zheng uint64_t desc_offset = le64_to_cpu(header.desc_offset); 5975a394b9eSStefan Hajnoczi if (desc_offset) { 598cf2ab8fcSKevin Wolf char *buf = vmdk_read_desc(file, desc_offset << 9, errp); 599d1833ef5SPaolo Bonzini if (!buf) { 600d1833ef5SPaolo Bonzini return -EINVAL; 601d1833ef5SPaolo Bonzini } 602a6468367SKevin Wolf ret = vmdk_open_desc_file(bs, flags, buf, options, errp); 603d1833ef5SPaolo Bonzini g_free(buf); 604d1833ef5SPaolo Bonzini return ret; 6055a394b9eSStefan Hajnoczi } 606f16f509dSFam Zheng } 60765bd155cSKevin Wolf 608f4c129a3SFam Zheng if (!s->create_type) { 609f4c129a3SFam Zheng s->create_type = g_strdup("monolithicSparse"); 610f4c129a3SFam Zheng } 611f4c129a3SFam Zheng 61265bd155cSKevin Wolf if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { 61365bd155cSKevin Wolf /* 61465bd155cSKevin Wolf * The footer takes precedence over the header, so read it in. The 61565bd155cSKevin Wolf * footer starts at offset -1024 from the end: One sector for the 61665bd155cSKevin Wolf * footer, and another one for the end-of-stream marker. 61765bd155cSKevin Wolf */ 61865bd155cSKevin Wolf struct { 61965bd155cSKevin Wolf struct { 62065bd155cSKevin Wolf uint64_t val; 62165bd155cSKevin Wolf uint32_t size; 62265bd155cSKevin Wolf uint32_t type; 62365bd155cSKevin Wolf uint8_t pad[512 - 16]; 62465bd155cSKevin Wolf } QEMU_PACKED footer_marker; 62565bd155cSKevin Wolf 62665bd155cSKevin Wolf uint32_t magic; 62765bd155cSKevin Wolf VMDK4Header header; 62865bd155cSKevin Wolf uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; 62965bd155cSKevin Wolf 63065bd155cSKevin Wolf struct { 63165bd155cSKevin Wolf uint64_t val; 63265bd155cSKevin Wolf uint32_t size; 63365bd155cSKevin Wolf uint32_t type; 63465bd155cSKevin Wolf uint8_t pad[512 - 16]; 63565bd155cSKevin Wolf } QEMU_PACKED eos_marker; 63665bd155cSKevin Wolf } QEMU_PACKED footer; 63765bd155cSKevin Wolf 638cf2ab8fcSKevin Wolf ret = bdrv_pread(file, 6399a4f4c31SKevin Wolf bs->file->bs->total_sectors * 512 - 1536, 64065bd155cSKevin Wolf &footer, sizeof(footer)); 64165bd155cSKevin Wolf if (ret < 0) { 642d899d2e2SFam Zheng error_setg_errno(errp, -ret, "Failed to read footer"); 64365bd155cSKevin Wolf return ret; 64465bd155cSKevin Wolf } 64565bd155cSKevin Wolf 64665bd155cSKevin Wolf /* Some sanity checks for the footer */ 64765bd155cSKevin Wolf if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || 64865bd155cSKevin Wolf le32_to_cpu(footer.footer_marker.size) != 0 || 64965bd155cSKevin Wolf le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || 65065bd155cSKevin Wolf le64_to_cpu(footer.eos_marker.val) != 0 || 65165bd155cSKevin Wolf le32_to_cpu(footer.eos_marker.size) != 0 || 65265bd155cSKevin Wolf le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) 65365bd155cSKevin Wolf { 654d899d2e2SFam Zheng error_setg(errp, "Invalid footer"); 65565bd155cSKevin Wolf return -EINVAL; 65665bd155cSKevin Wolf } 65765bd155cSKevin Wolf 65865bd155cSKevin Wolf header = footer.header; 65965bd155cSKevin Wolf } 66065bd155cSKevin Wolf 6613db1d98aSFam Zheng compressed = 6623db1d98aSFam Zheng le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; 663509d39aaSFam Zheng if (le32_to_cpu(header.version) > 3) { 664a55448b3SMax Reitz error_setg(errp, "Unsupported VMDK version %" PRIu32, 66596c51eb5SFam Zheng le32_to_cpu(header.version)); 66696c51eb5SFam Zheng return -ENOTSUP; 6673db1d98aSFam Zheng } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) && 6683db1d98aSFam Zheng !compressed) { 669509d39aaSFam Zheng /* VMware KB 2064959 explains that version 3 added support for 670509d39aaSFam Zheng * persistent changed block tracking (CBT), and backup software can 671509d39aaSFam Zheng * read it as version=1 if it doesn't care about the changed area 672509d39aaSFam Zheng * information. So we are safe to enable read only. */ 673509d39aaSFam Zheng error_setg(errp, "VMDK version 3 must be read only"); 674509d39aaSFam Zheng return -EINVAL; 67596c51eb5SFam Zheng } 67696c51eb5SFam Zheng 677ca8804ceSFam Zheng if (le32_to_cpu(header.num_gtes_per_gt) > 512) { 67889ac8480SPaolo Bonzini error_setg(errp, "L2 table size too big"); 679f8ce0403SFam Zheng return -EINVAL; 680f8ce0403SFam Zheng } 681f8ce0403SFam Zheng 682ca8804ceSFam Zheng l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt) 683b3976d3cSFam Zheng * le64_to_cpu(header.granularity); 68475d12341SStefan Weil if (l1_entry_sectors == 0) { 685d899d2e2SFam Zheng error_setg(errp, "L1 entry size is invalid"); 68686c6b429SFam Zheng return -EINVAL; 68786c6b429SFam Zheng } 688b3976d3cSFam Zheng l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) 689b3976d3cSFam Zheng / l1_entry_sectors; 690bb45ded9SFam Zheng if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { 691bb45ded9SFam Zheng l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; 692bb45ded9SFam Zheng } 69324bc15d1SKevin Wolf if (bdrv_nb_sectors(file->bs) < le64_to_cpu(header.grain_offset)) { 6944ab9dab5SFam Zheng error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes", 6954ab9dab5SFam Zheng (int64_t)(le64_to_cpu(header.grain_offset) 6964ab9dab5SFam Zheng * BDRV_SECTOR_SIZE)); 69734ceed81SFam Zheng return -EINVAL; 69834ceed81SFam Zheng } 69934ceed81SFam Zheng 7008aa1331cSFam Zheng ret = vmdk_add_extent(bs, file, false, 701b3976d3cSFam Zheng le64_to_cpu(header.capacity), 702b3976d3cSFam Zheng le64_to_cpu(header.gd_offset) << 9, 703bb45ded9SFam Zheng l1_backup_offset, 704b3976d3cSFam Zheng l1_size, 705ca8804ceSFam Zheng le32_to_cpu(header.num_gtes_per_gt), 7068aa1331cSFam Zheng le64_to_cpu(header.granularity), 7074823970bSFam Zheng &extent, 7084823970bSFam Zheng errp); 7098aa1331cSFam Zheng if (ret < 0) { 7108aa1331cSFam Zheng return ret; 7118aa1331cSFam Zheng } 712432bb170SFam Zheng extent->compressed = 713432bb170SFam Zheng le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; 714d8a7b061SFam Zheng if (extent->compressed) { 715d8a7b061SFam Zheng g_free(s->create_type); 716d8a7b061SFam Zheng s->create_type = g_strdup("streamOptimized"); 717d8a7b061SFam Zheng } 718432bb170SFam Zheng extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; 71914ead646SFam Zheng extent->version = le32_to_cpu(header.version); 72014ead646SFam Zheng extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; 7214823970bSFam Zheng ret = vmdk_init_tables(bs, extent, errp); 722b4b3ab14SFam Zheng if (ret) { 72386c6b429SFam Zheng /* free extent allocated by vmdk_add_extent */ 72486c6b429SFam Zheng vmdk_free_last_extent(bs); 725019d6b8fSAnthony Liguori } 726b4b3ab14SFam Zheng return ret; 727b4b3ab14SFam Zheng } 728b4b3ab14SFam Zheng 7297fa60fa3SFam Zheng /* find an option value out of descriptor file */ 7307fa60fa3SFam Zheng static int vmdk_parse_description(const char *desc, const char *opt_name, 7317fa60fa3SFam Zheng char *buf, int buf_size) 7327fa60fa3SFam Zheng { 7337fa60fa3SFam Zheng char *opt_pos, *opt_end; 7347fa60fa3SFam Zheng const char *end = desc + strlen(desc); 7357fa60fa3SFam Zheng 7367fa60fa3SFam Zheng opt_pos = strstr(desc, opt_name); 7377fa60fa3SFam Zheng if (!opt_pos) { 73865f74725SFam Zheng return VMDK_ERROR; 7397fa60fa3SFam Zheng } 7407fa60fa3SFam Zheng /* Skip "=\"" following opt_name */ 7417fa60fa3SFam Zheng opt_pos += strlen(opt_name) + 2; 7427fa60fa3SFam Zheng if (opt_pos >= end) { 74365f74725SFam Zheng return VMDK_ERROR; 7447fa60fa3SFam Zheng } 7457fa60fa3SFam Zheng opt_end = opt_pos; 7467fa60fa3SFam Zheng while (opt_end < end && *opt_end != '"') { 7477fa60fa3SFam Zheng opt_end++; 7487fa60fa3SFam Zheng } 7497fa60fa3SFam Zheng if (opt_end == end || buf_size < opt_end - opt_pos + 1) { 75065f74725SFam Zheng return VMDK_ERROR; 7517fa60fa3SFam Zheng } 7527fa60fa3SFam Zheng pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); 75365f74725SFam Zheng return VMDK_OK; 7547fa60fa3SFam Zheng } 7557fa60fa3SFam Zheng 75686c6b429SFam Zheng /* Open an extent file and append to bs array */ 75724bc15d1SKevin Wolf static int vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags, 758a6468367SKevin Wolf char *buf, QDict *options, Error **errp) 75986c6b429SFam Zheng { 76086c6b429SFam Zheng uint32_t magic; 76186c6b429SFam Zheng 762d1833ef5SPaolo Bonzini magic = ldl_be_p(buf); 76386c6b429SFam Zheng switch (magic) { 76486c6b429SFam Zheng case VMDK3_MAGIC: 7654823970bSFam Zheng return vmdk_open_vmfs_sparse(bs, file, flags, errp); 76686c6b429SFam Zheng break; 76786c6b429SFam Zheng case VMDK4_MAGIC: 768a6468367SKevin Wolf return vmdk_open_vmdk4(bs, file, flags, options, errp); 76986c6b429SFam Zheng break; 77086c6b429SFam Zheng default: 77176abe407SPaolo Bonzini error_setg(errp, "Image not in VMDK format"); 77276abe407SPaolo Bonzini return -EINVAL; 77386c6b429SFam Zheng break; 77486c6b429SFam Zheng } 77586c6b429SFam Zheng } 77686c6b429SFam Zheng 777e4937694SMarkus Armbruster static const char *next_line(const char *s) 778e4937694SMarkus Armbruster { 779e4937694SMarkus Armbruster while (*s) { 780e4937694SMarkus Armbruster if (*s == '\n') { 781e4937694SMarkus Armbruster return s + 1; 782e4937694SMarkus Armbruster } 783e4937694SMarkus Armbruster s++; 784e4937694SMarkus Armbruster } 785e4937694SMarkus Armbruster return s; 786e4937694SMarkus Armbruster } 787e4937694SMarkus Armbruster 7887fa60fa3SFam Zheng static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, 789a6468367SKevin Wolf const char *desc_file_path, QDict *options, 790a6468367SKevin Wolf Error **errp) 7917fa60fa3SFam Zheng { 7927fa60fa3SFam Zheng int ret; 793395a22faSJeff Cody int matches; 7947fa60fa3SFam Zheng char access[11]; 7957fa60fa3SFam Zheng char type[11]; 7967fa60fa3SFam Zheng char fname[512]; 797d28d737fSMarkus Armbruster const char *p, *np; 7987fa60fa3SFam Zheng int64_t sectors = 0; 7997fa60fa3SFam Zheng int64_t flat_offset; 800fe206562SJeff Cody char *extent_path; 80124bc15d1SKevin Wolf BdrvChild *extent_file; 802f4c129a3SFam Zheng BDRVVmdkState *s = bs->opaque; 803f4c129a3SFam Zheng VmdkExtent *extent; 804a6468367SKevin Wolf char extent_opt_prefix[32]; 80524bc15d1SKevin Wolf Error *local_err = NULL; 8067fa60fa3SFam Zheng 807e4937694SMarkus Armbruster for (p = desc; *p; p = next_line(p)) { 8088a3e0bc3SFam Zheng /* parse extent line in one of below formats: 8098a3e0bc3SFam Zheng * 8107fa60fa3SFam Zheng * RW [size in sectors] FLAT "file-name.vmdk" OFFSET 8117fa60fa3SFam Zheng * RW [size in sectors] SPARSE "file-name.vmdk" 8128a3e0bc3SFam Zheng * RW [size in sectors] VMFS "file-name.vmdk" 8138a3e0bc3SFam Zheng * RW [size in sectors] VMFSSPARSE "file-name.vmdk" 8147fa60fa3SFam Zheng */ 8157fa60fa3SFam Zheng flat_offset = -1; 816395a22faSJeff Cody matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, 8177fa60fa3SFam Zheng access, §ors, type, fname, &flat_offset); 818395a22faSJeff Cody if (matches < 4 || strcmp(access, "RW")) { 819e4937694SMarkus Armbruster continue; 8207fa60fa3SFam Zheng } else if (!strcmp(type, "FLAT")) { 821395a22faSJeff Cody if (matches != 5 || flat_offset < 0) { 822d28d737fSMarkus Armbruster goto invalid; 8237fa60fa3SFam Zheng } 824dbbcaa8dSFam Zheng } else if (!strcmp(type, "VMFS")) { 825395a22faSJeff Cody if (matches == 4) { 826dbbcaa8dSFam Zheng flat_offset = 0; 827b47053bdSFam Zheng } else { 828d28d737fSMarkus Armbruster goto invalid; 829b47053bdSFam Zheng } 830395a22faSJeff Cody } else if (matches != 4) { 831d28d737fSMarkus Armbruster goto invalid; 8327fa60fa3SFam Zheng } 8337fa60fa3SFam Zheng 8347fa60fa3SFam Zheng if (sectors <= 0 || 835daac8fdcSFam Zheng (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && 83604d542c8SPaolo Bonzini strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE")) || 8377fa60fa3SFam Zheng (strcmp(access, "RW"))) { 838e4937694SMarkus Armbruster continue; 8397fa60fa3SFam Zheng } 8407fa60fa3SFam Zheng 8415c98415bSMax Reitz if (!path_is_absolute(fname) && !path_has_protocol(fname) && 8425c98415bSMax Reitz !desc_file_path[0]) 8435c98415bSMax Reitz { 8445c98415bSMax Reitz error_setg(errp, "Cannot use relative extent paths with VMDK " 8459a4f4c31SKevin Wolf "descriptor file '%s'", bs->file->bs->filename); 8465c98415bSMax Reitz return -EINVAL; 8475c98415bSMax Reitz } 8485c98415bSMax Reitz 849fe206562SJeff Cody extent_path = g_malloc0(PATH_MAX); 850a7be17beSJeff Cody path_combine(extent_path, PATH_MAX, desc_file_path, fname); 851a6468367SKevin Wolf 852a6468367SKevin Wolf ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents); 853a6468367SKevin Wolf assert(ret < 32); 854a6468367SKevin Wolf 85524bc15d1SKevin Wolf extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix, 85624bc15d1SKevin Wolf bs, &child_file, false, &local_err); 857fe206562SJeff Cody g_free(extent_path); 85824bc15d1SKevin Wolf if (local_err) { 85924bc15d1SKevin Wolf error_propagate(errp, local_err); 86024bc15d1SKevin Wolf return -EINVAL; 8617fa60fa3SFam Zheng } 86286c6b429SFam Zheng 86386c6b429SFam Zheng /* save to extents array */ 86404d542c8SPaolo Bonzini if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) { 86586c6b429SFam Zheng /* FLAT extent */ 86686c6b429SFam Zheng 8678aa1331cSFam Zheng ret = vmdk_add_extent(bs, extent_file, true, sectors, 8684823970bSFam Zheng 0, 0, 0, 0, 0, &extent, errp); 8698aa1331cSFam Zheng if (ret < 0) { 87024bc15d1SKevin Wolf bdrv_unref_child(bs, extent_file); 8718aa1331cSFam Zheng return ret; 8728aa1331cSFam Zheng } 873f16f509dSFam Zheng extent->flat_start_offset = flat_offset << 9; 874daac8fdcSFam Zheng } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) { 875daac8fdcSFam Zheng /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/ 876cf2ab8fcSKevin Wolf char *buf = vmdk_read_desc(extent_file, 0, errp); 877d1833ef5SPaolo Bonzini if (!buf) { 878d1833ef5SPaolo Bonzini ret = -EINVAL; 879d1833ef5SPaolo Bonzini } else { 880a6468367SKevin Wolf ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, 881a6468367SKevin Wolf options, errp); 882d1833ef5SPaolo Bonzini } 883d1833ef5SPaolo Bonzini g_free(buf); 884b6b1d31fSStefan Hajnoczi if (ret) { 88524bc15d1SKevin Wolf bdrv_unref_child(bs, extent_file); 88686c6b429SFam Zheng return ret; 88786c6b429SFam Zheng } 888f4c129a3SFam Zheng extent = &s->extents[s->num_extents - 1]; 8897fa60fa3SFam Zheng } else { 8904823970bSFam Zheng error_setg(errp, "Unsupported extent type '%s'", type); 89124bc15d1SKevin Wolf bdrv_unref_child(bs, extent_file); 8927fa60fa3SFam Zheng return -ENOTSUP; 8937fa60fa3SFam Zheng } 894f4c129a3SFam Zheng extent->type = g_strdup(type); 895899f1ae2SFam Zheng } 8967fa60fa3SFam Zheng return 0; 897d28d737fSMarkus Armbruster 898d28d737fSMarkus Armbruster invalid: 899d28d737fSMarkus Armbruster np = next_line(p); 900d28d737fSMarkus Armbruster assert(np != p); 901d28d737fSMarkus Armbruster if (np[-1] == '\n') { 902d28d737fSMarkus Armbruster np--; 903d28d737fSMarkus Armbruster } 904d28d737fSMarkus Armbruster error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p); 905d28d737fSMarkus Armbruster return -EINVAL; 9067fa60fa3SFam Zheng } 9077fa60fa3SFam Zheng 908d1833ef5SPaolo Bonzini static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, 909a6468367SKevin Wolf QDict *options, Error **errp) 9107fa60fa3SFam Zheng { 9117fa60fa3SFam Zheng int ret; 9127fa60fa3SFam Zheng char ct[128]; 9137fa60fa3SFam Zheng BDRVVmdkState *s = bs->opaque; 9147fa60fa3SFam Zheng 9157fa60fa3SFam Zheng if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { 91676abe407SPaolo Bonzini error_setg(errp, "invalid VMDK image descriptor"); 91776abe407SPaolo Bonzini ret = -EINVAL; 9180bed087dSEvgeny Budilovsky goto exit; 9197fa60fa3SFam Zheng } 9206398de51SFam Zheng if (strcmp(ct, "monolithicFlat") && 92104d542c8SPaolo Bonzini strcmp(ct, "vmfs") && 922daac8fdcSFam Zheng strcmp(ct, "vmfsSparse") && 92386c6b429SFam Zheng strcmp(ct, "twoGbMaxExtentSparse") && 9246398de51SFam Zheng strcmp(ct, "twoGbMaxExtentFlat")) { 9254823970bSFam Zheng error_setg(errp, "Unsupported image type '%s'", ct); 9260bed087dSEvgeny Budilovsky ret = -ENOTSUP; 9270bed087dSEvgeny Budilovsky goto exit; 9287fa60fa3SFam Zheng } 929f4c129a3SFam Zheng s->create_type = g_strdup(ct); 9307fa60fa3SFam Zheng s->desc_offset = 0; 9319a4f4c31SKevin Wolf ret = vmdk_parse_extents(buf, bs, bs->file->bs->exact_filename, options, 9329a4f4c31SKevin Wolf errp); 9330bed087dSEvgeny Budilovsky exit: 9340bed087dSEvgeny Budilovsky return ret; 9357fa60fa3SFam Zheng } 9367fa60fa3SFam Zheng 937015a1036SMax Reitz static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, 938015a1036SMax Reitz Error **errp) 939b4b3ab14SFam Zheng { 9409aeecbbcSFam Zheng char *buf; 94186c6b429SFam Zheng int ret; 94286c6b429SFam Zheng BDRVVmdkState *s = bs->opaque; 94337f09e5eSPaolo Bonzini uint32_t magic; 944b4b3ab14SFam Zheng 945cf2ab8fcSKevin Wolf buf = vmdk_read_desc(bs->file, 0, errp); 946d1833ef5SPaolo Bonzini if (!buf) { 947d1833ef5SPaolo Bonzini return -EINVAL; 948d1833ef5SPaolo Bonzini } 949d1833ef5SPaolo Bonzini 95037f09e5eSPaolo Bonzini magic = ldl_be_p(buf); 95137f09e5eSPaolo Bonzini switch (magic) { 95237f09e5eSPaolo Bonzini case VMDK3_MAGIC: 95337f09e5eSPaolo Bonzini case VMDK4_MAGIC: 9549a4f4c31SKevin Wolf ret = vmdk_open_sparse(bs, bs->file, flags, buf, options, 95524bc15d1SKevin Wolf errp); 95686c6b429SFam Zheng s->desc_offset = 0x200; 95737f09e5eSPaolo Bonzini break; 95837f09e5eSPaolo Bonzini default: 959a6468367SKevin Wolf ret = vmdk_open_desc_file(bs, flags, buf, options, errp); 96037f09e5eSPaolo Bonzini break; 96137f09e5eSPaolo Bonzini } 962bae0a0ccSPaolo Bonzini if (ret) { 963bae0a0ccSPaolo Bonzini goto fail; 964bae0a0ccSPaolo Bonzini } 96537f09e5eSPaolo Bonzini 96686c6b429SFam Zheng /* try to open parent images, if exist */ 96786c6b429SFam Zheng ret = vmdk_parent_open(bs); 96886c6b429SFam Zheng if (ret) { 969bae0a0ccSPaolo Bonzini goto fail; 970b4b3ab14SFam Zheng } 971f4c129a3SFam Zheng s->cid = vmdk_read_cid(bs, 0); 97286c6b429SFam Zheng s->parent_cid = vmdk_read_cid(bs, 1); 973848c66e8SPaolo Bonzini qemu_co_mutex_init(&s->lock); 9742bc3166cSKevin Wolf 9752bc3166cSKevin Wolf /* Disable migration when VMDK images are used */ 97681e5f78aSAlberto Garcia error_setg(&s->migration_blocker, "The vmdk format used by node '%s' " 97781e5f78aSAlberto Garcia "does not support live migration", 97881e5f78aSAlberto Garcia bdrv_get_device_or_node_name(bs)); 9792bc3166cSKevin Wolf migrate_add_blocker(s->migration_blocker); 980d1833ef5SPaolo Bonzini g_free(buf); 9812bc3166cSKevin Wolf return 0; 982bae0a0ccSPaolo Bonzini 983bae0a0ccSPaolo Bonzini fail: 984d1833ef5SPaolo Bonzini g_free(buf); 985f4c129a3SFam Zheng g_free(s->create_type); 986f4c129a3SFam Zheng s->create_type = NULL; 987bae0a0ccSPaolo Bonzini vmdk_free_extents(bs); 988bae0a0ccSPaolo Bonzini return ret; 989019d6b8fSAnthony Liguori } 990019d6b8fSAnthony Liguori 991d34682cdSKevin Wolf 9923baca891SKevin Wolf static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp) 993d34682cdSKevin Wolf { 994d34682cdSKevin Wolf BDRVVmdkState *s = bs->opaque; 995d34682cdSKevin Wolf int i; 996d34682cdSKevin Wolf 997d34682cdSKevin Wolf for (i = 0; i < s->num_extents; i++) { 998d34682cdSKevin Wolf if (!s->extents[i].flat) { 999cf081fcaSEric Blake bs->bl.pwrite_zeroes_alignment = 1000cf081fcaSEric Blake MAX(bs->bl.pwrite_zeroes_alignment, 1001cf081fcaSEric Blake s->extents[i].cluster_sectors << BDRV_SECTOR_BITS); 1002d34682cdSKevin Wolf } 1003d34682cdSKevin Wolf } 1004d34682cdSKevin Wolf } 1005d34682cdSKevin Wolf 1006c6ac36e1SFam Zheng /** 1007c6ac36e1SFam Zheng * get_whole_cluster 1008c6ac36e1SFam Zheng * 1009c6ac36e1SFam Zheng * Copy backing file's cluster that covers @sector_num, otherwise write zero, 1010c6ac36e1SFam Zheng * to the cluster at @cluster_sector_num. 1011c6ac36e1SFam Zheng * 1012c6ac36e1SFam Zheng * If @skip_start_sector < @skip_end_sector, the relative range 1013c6ac36e1SFam Zheng * [@skip_start_sector, @skip_end_sector) is not copied or written, and leave 1014c6ac36e1SFam Zheng * it for call to write user data in the request. 1015c6ac36e1SFam Zheng */ 1016b3976d3cSFam Zheng static int get_whole_cluster(BlockDriverState *bs, 1017b3976d3cSFam Zheng VmdkExtent *extent, 101837b1d7d8SKevin Wolf uint64_t cluster_offset, 101937b1d7d8SKevin Wolf uint64_t offset, 102037b1d7d8SKevin Wolf uint64_t skip_start_bytes, 102137b1d7d8SKevin Wolf uint64_t skip_end_bytes) 1022019d6b8fSAnthony Liguori { 1023bf81507dSFam Zheng int ret = VMDK_OK; 1024c6ac36e1SFam Zheng int64_t cluster_bytes; 1025c6ac36e1SFam Zheng uint8_t *whole_grain; 1026019d6b8fSAnthony Liguori 1027c6ac36e1SFam Zheng /* For COW, align request sector_num to cluster start */ 1028c6ac36e1SFam Zheng cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS; 102937b1d7d8SKevin Wolf offset = QEMU_ALIGN_DOWN(offset, cluster_bytes); 1030c6ac36e1SFam Zheng whole_grain = qemu_blockalign(bs, cluster_bytes); 1031c6ac36e1SFam Zheng 1032760e0063SKevin Wolf if (!bs->backing) { 103337b1d7d8SKevin Wolf memset(whole_grain, 0, skip_start_bytes); 103437b1d7d8SKevin Wolf memset(whole_grain + skip_end_bytes, 0, cluster_bytes - skip_end_bytes); 1035c6ac36e1SFam Zheng } 1036c6ac36e1SFam Zheng 103737b1d7d8SKevin Wolf assert(skip_end_bytes <= cluster_bytes); 10380e69c543SFam Zheng /* we will be here if it's first write on non-exist grain(cluster). 10390e69c543SFam Zheng * try to read from parent image, if exist */ 1040760e0063SKevin Wolf if (bs->backing && !vmdk_is_cid_valid(bs)) { 1041c6ac36e1SFam Zheng ret = VMDK_ERROR; 1042c6ac36e1SFam Zheng goto exit; 1043c6ac36e1SFam Zheng } 1044c6ac36e1SFam Zheng 1045c6ac36e1SFam Zheng /* Read backing data before skip range */ 104637b1d7d8SKevin Wolf if (skip_start_bytes > 0) { 1047760e0063SKevin Wolf if (bs->backing) { 1048cf2ab8fcSKevin Wolf ret = bdrv_pread(bs->backing, offset, whole_grain, 104937b1d7d8SKevin Wolf skip_start_bytes); 1050c336500dSKevin Wolf if (ret < 0) { 1051bf81507dSFam Zheng ret = VMDK_ERROR; 1052bf81507dSFam Zheng goto exit; 1053019d6b8fSAnthony Liguori } 1054019d6b8fSAnthony Liguori } 1055d9ca2ea2SKevin Wolf ret = bdrv_pwrite(extent->file, cluster_offset, whole_grain, 105637b1d7d8SKevin Wolf skip_start_bytes); 1057c6ac36e1SFam Zheng if (ret < 0) { 1058c6ac36e1SFam Zheng ret = VMDK_ERROR; 1059c6ac36e1SFam Zheng goto exit; 1060c6ac36e1SFam Zheng } 1061c6ac36e1SFam Zheng } 1062c6ac36e1SFam Zheng /* Read backing data after skip range */ 106337b1d7d8SKevin Wolf if (skip_end_bytes < cluster_bytes) { 1064760e0063SKevin Wolf if (bs->backing) { 1065cf2ab8fcSKevin Wolf ret = bdrv_pread(bs->backing, offset + skip_end_bytes, 106637b1d7d8SKevin Wolf whole_grain + skip_end_bytes, 106737b1d7d8SKevin Wolf cluster_bytes - skip_end_bytes); 1068c6ac36e1SFam Zheng if (ret < 0) { 1069c6ac36e1SFam Zheng ret = VMDK_ERROR; 1070c6ac36e1SFam Zheng goto exit; 1071c6ac36e1SFam Zheng } 1072c6ac36e1SFam Zheng } 1073d9ca2ea2SKevin Wolf ret = bdrv_pwrite(extent->file, cluster_offset + skip_end_bytes, 107437b1d7d8SKevin Wolf whole_grain + skip_end_bytes, 107537b1d7d8SKevin Wolf cluster_bytes - skip_end_bytes); 1076c6ac36e1SFam Zheng if (ret < 0) { 1077c6ac36e1SFam Zheng ret = VMDK_ERROR; 1078c6ac36e1SFam Zheng goto exit; 1079c6ac36e1SFam Zheng } 1080c6ac36e1SFam Zheng } 1081c6ac36e1SFam Zheng 108237b1d7d8SKevin Wolf ret = VMDK_OK; 1083bf81507dSFam Zheng exit: 1084bf81507dSFam Zheng qemu_vfree(whole_grain); 1085bf81507dSFam Zheng return ret; 1086019d6b8fSAnthony Liguori } 1087019d6b8fSAnthony Liguori 1088c6ac36e1SFam Zheng static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data, 1089c6ac36e1SFam Zheng uint32_t offset) 1090019d6b8fSAnthony Liguori { 1091c6ac36e1SFam Zheng offset = cpu_to_le32(offset); 1092019d6b8fSAnthony Liguori /* update L2 table */ 1093d9ca2ea2SKevin Wolf if (bdrv_pwrite_sync(extent->file, 1094b3976d3cSFam Zheng ((int64_t)m_data->l2_offset * 512) 1095c6ac36e1SFam Zheng + (m_data->l2_index * sizeof(offset)), 1096e304e8e5SFam Zheng &offset, sizeof(offset)) < 0) { 109765f74725SFam Zheng return VMDK_ERROR; 1098b3976d3cSFam Zheng } 1099019d6b8fSAnthony Liguori /* update backup L2 table */ 1100b3976d3cSFam Zheng if (extent->l1_backup_table_offset != 0) { 1101b3976d3cSFam Zheng m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; 1102d9ca2ea2SKevin Wolf if (bdrv_pwrite_sync(extent->file, 1103b3976d3cSFam Zheng ((int64_t)m_data->l2_offset * 512) 1104c6ac36e1SFam Zheng + (m_data->l2_index * sizeof(offset)), 1105e304e8e5SFam Zheng &offset, sizeof(offset)) < 0) { 110665f74725SFam Zheng return VMDK_ERROR; 1107019d6b8fSAnthony Liguori } 1108b3976d3cSFam Zheng } 1109cdeaf1f1SFam Zheng if (m_data->l2_cache_entry) { 1110cdeaf1f1SFam Zheng *m_data->l2_cache_entry = offset; 1111cdeaf1f1SFam Zheng } 1112019d6b8fSAnthony Liguori 111365f74725SFam Zheng return VMDK_OK; 1114019d6b8fSAnthony Liguori } 1115019d6b8fSAnthony Liguori 1116c6ac36e1SFam Zheng /** 1117c6ac36e1SFam Zheng * get_cluster_offset 1118c6ac36e1SFam Zheng * 1119c6ac36e1SFam Zheng * Look up cluster offset in extent file by sector number, and store in 1120c6ac36e1SFam Zheng * @cluster_offset. 1121c6ac36e1SFam Zheng * 1122c6ac36e1SFam Zheng * For flat extents, the start offset as parsed from the description file is 1123c6ac36e1SFam Zheng * returned. 1124c6ac36e1SFam Zheng * 1125c6ac36e1SFam Zheng * For sparse extents, look up in L1, L2 table. If allocate is true, return an 1126c6ac36e1SFam Zheng * offset for a new cluster and update L2 cache. If there is a backing file, 1127c6ac36e1SFam Zheng * COW is done before returning; otherwise, zeroes are written to the allocated 1128c6ac36e1SFam Zheng * cluster. Both COW and zero writing skips the sector range 1129c6ac36e1SFam Zheng * [@skip_start_sector, @skip_end_sector) passed in by caller, because caller 1130c6ac36e1SFam Zheng * has new data to write there. 1131c6ac36e1SFam Zheng * 1132c6ac36e1SFam Zheng * Returns: VMDK_OK if cluster exists and mapped in the image. 1133c6ac36e1SFam Zheng * VMDK_UNALLOC if cluster is not mapped and @allocate is false. 1134c6ac36e1SFam Zheng * VMDK_ERROR if failed. 1135c6ac36e1SFam Zheng */ 113691b85bd3SFam Zheng static int get_cluster_offset(BlockDriverState *bs, 1137b3976d3cSFam Zheng VmdkExtent *extent, 1138b3976d3cSFam Zheng VmdkMetaData *m_data, 113991b85bd3SFam Zheng uint64_t offset, 1140c6ac36e1SFam Zheng bool allocate, 1141c6ac36e1SFam Zheng uint64_t *cluster_offset, 114237b1d7d8SKevin Wolf uint64_t skip_start_bytes, 114337b1d7d8SKevin Wolf uint64_t skip_end_bytes) 1144019d6b8fSAnthony Liguori { 1145019d6b8fSAnthony Liguori unsigned int l1_index, l2_offset, l2_index; 1146019d6b8fSAnthony Liguori int min_index, i, j; 1147e304e8e5SFam Zheng uint32_t min_count, *l2_table; 114814ead646SFam Zheng bool zeroed = false; 1149c6ac36e1SFam Zheng int64_t ret; 1150d1319b07SFam Zheng int64_t cluster_sector; 1151019d6b8fSAnthony Liguori 1152ae261c86SFam Zheng if (m_data) { 1153019d6b8fSAnthony Liguori m_data->valid = 0; 1154ae261c86SFam Zheng } 115591b85bd3SFam Zheng if (extent->flat) { 11567fa60fa3SFam Zheng *cluster_offset = extent->flat_start_offset; 115765f74725SFam Zheng return VMDK_OK; 115891b85bd3SFam Zheng } 1159019d6b8fSAnthony Liguori 11606398de51SFam Zheng offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; 1161b3976d3cSFam Zheng l1_index = (offset >> 9) / extent->l1_entry_sectors; 1162b3976d3cSFam Zheng if (l1_index >= extent->l1_size) { 116365f74725SFam Zheng return VMDK_ERROR; 1164b3976d3cSFam Zheng } 1165b3976d3cSFam Zheng l2_offset = extent->l1_table[l1_index]; 1166b3976d3cSFam Zheng if (!l2_offset) { 116765f74725SFam Zheng return VMDK_UNALLOC; 1168b3976d3cSFam Zheng } 1169019d6b8fSAnthony Liguori for (i = 0; i < L2_CACHE_SIZE; i++) { 1170b3976d3cSFam Zheng if (l2_offset == extent->l2_cache_offsets[i]) { 1171019d6b8fSAnthony Liguori /* increment the hit count */ 1172b3976d3cSFam Zheng if (++extent->l2_cache_counts[i] == 0xffffffff) { 1173019d6b8fSAnthony Liguori for (j = 0; j < L2_CACHE_SIZE; j++) { 1174b3976d3cSFam Zheng extent->l2_cache_counts[j] >>= 1; 1175019d6b8fSAnthony Liguori } 1176019d6b8fSAnthony Liguori } 1177b3976d3cSFam Zheng l2_table = extent->l2_cache + (i * extent->l2_size); 1178019d6b8fSAnthony Liguori goto found; 1179019d6b8fSAnthony Liguori } 1180019d6b8fSAnthony Liguori } 1181019d6b8fSAnthony Liguori /* not found: load a new entry in the least used one */ 1182019d6b8fSAnthony Liguori min_index = 0; 1183019d6b8fSAnthony Liguori min_count = 0xffffffff; 1184019d6b8fSAnthony Liguori for (i = 0; i < L2_CACHE_SIZE; i++) { 1185b3976d3cSFam Zheng if (extent->l2_cache_counts[i] < min_count) { 1186b3976d3cSFam Zheng min_count = extent->l2_cache_counts[i]; 1187019d6b8fSAnthony Liguori min_index = i; 1188019d6b8fSAnthony Liguori } 1189019d6b8fSAnthony Liguori } 1190b3976d3cSFam Zheng l2_table = extent->l2_cache + (min_index * extent->l2_size); 1191cf2ab8fcSKevin Wolf if (bdrv_pread(extent->file, 1192b3976d3cSFam Zheng (int64_t)l2_offset * 512, 1193b3976d3cSFam Zheng l2_table, 1194b3976d3cSFam Zheng extent->l2_size * sizeof(uint32_t) 1195b3976d3cSFam Zheng ) != extent->l2_size * sizeof(uint32_t)) { 119665f74725SFam Zheng return VMDK_ERROR; 1197b3976d3cSFam Zheng } 1198019d6b8fSAnthony Liguori 1199b3976d3cSFam Zheng extent->l2_cache_offsets[min_index] = l2_offset; 1200b3976d3cSFam Zheng extent->l2_cache_counts[min_index] = 1; 1201019d6b8fSAnthony Liguori found: 1202b3976d3cSFam Zheng l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; 1203c6ac36e1SFam Zheng cluster_sector = le32_to_cpu(l2_table[l2_index]); 1204019d6b8fSAnthony Liguori 1205c6ac36e1SFam Zheng if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) { 120614ead646SFam Zheng zeroed = true; 120714ead646SFam Zheng } 120814ead646SFam Zheng 1209c6ac36e1SFam Zheng if (!cluster_sector || zeroed) { 121091b85bd3SFam Zheng if (!allocate) { 121114ead646SFam Zheng return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; 121291b85bd3SFam Zheng } 12139949f97eSKevin Wolf 1214c6ac36e1SFam Zheng cluster_sector = extent->next_cluster_sector; 1215c6ac36e1SFam Zheng extent->next_cluster_sector += extent->cluster_sectors; 12169949f97eSKevin Wolf 1217019d6b8fSAnthony Liguori /* First of all we write grain itself, to avoid race condition 1218019d6b8fSAnthony Liguori * that may to corrupt the image. 1219019d6b8fSAnthony Liguori * This problem may occur because of insufficient space on host disk 1220019d6b8fSAnthony Liguori * or inappropriate VM shutdown. 1221019d6b8fSAnthony Liguori */ 122237b1d7d8SKevin Wolf ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE, 122337b1d7d8SKevin Wolf offset, skip_start_bytes, skip_end_bytes); 1224c6ac36e1SFam Zheng if (ret) { 1225c6ac36e1SFam Zheng return ret; 1226019d6b8fSAnthony Liguori } 1227*524089bcSReda Sallahi if (m_data) { 1228*524089bcSReda Sallahi m_data->valid = 1; 1229*524089bcSReda Sallahi m_data->l1_index = l1_index; 1230*524089bcSReda Sallahi m_data->l2_index = l2_index; 1231*524089bcSReda Sallahi m_data->l2_offset = l2_offset; 1232*524089bcSReda Sallahi m_data->l2_cache_entry = &l2_table[l2_index]; 1233*524089bcSReda Sallahi } 1234019d6b8fSAnthony Liguori } 1235c6ac36e1SFam Zheng *cluster_offset = cluster_sector << BDRV_SECTOR_BITS; 123665f74725SFam Zheng return VMDK_OK; 1237019d6b8fSAnthony Liguori } 1238019d6b8fSAnthony Liguori 1239b3976d3cSFam Zheng static VmdkExtent *find_extent(BDRVVmdkState *s, 1240b3976d3cSFam Zheng int64_t sector_num, VmdkExtent *start_hint) 1241b3976d3cSFam Zheng { 1242b3976d3cSFam Zheng VmdkExtent *extent = start_hint; 1243b3976d3cSFam Zheng 1244b3976d3cSFam Zheng if (!extent) { 1245b3976d3cSFam Zheng extent = &s->extents[0]; 1246b3976d3cSFam Zheng } 1247b3976d3cSFam Zheng while (extent < &s->extents[s->num_extents]) { 1248b3976d3cSFam Zheng if (sector_num < extent->end_sector) { 1249b3976d3cSFam Zheng return extent; 1250b3976d3cSFam Zheng } 1251b3976d3cSFam Zheng extent++; 1252b3976d3cSFam Zheng } 1253b3976d3cSFam Zheng return NULL; 1254b3976d3cSFam Zheng } 1255b3976d3cSFam Zheng 1256a844a2b0SKevin Wolf static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent, 1257a844a2b0SKevin Wolf int64_t offset) 1258a844a2b0SKevin Wolf { 12599be38598SEduardo Habkost uint64_t extent_begin_offset, extent_relative_offset; 1260a844a2b0SKevin Wolf uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE; 1261a844a2b0SKevin Wolf 1262a844a2b0SKevin Wolf extent_begin_offset = 1263a844a2b0SKevin Wolf (extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE; 1264a844a2b0SKevin Wolf extent_relative_offset = offset - extent_begin_offset; 12659be38598SEduardo Habkost return extent_relative_offset % cluster_size; 1266a844a2b0SKevin Wolf } 1267a844a2b0SKevin Wolf 126861f0ed1dSFam Zheng static inline uint64_t vmdk_find_index_in_cluster(VmdkExtent *extent, 126961f0ed1dSFam Zheng int64_t sector_num) 127061f0ed1dSFam Zheng { 1271a844a2b0SKevin Wolf uint64_t offset; 1272a844a2b0SKevin Wolf offset = vmdk_find_offset_in_cluster(extent, sector_num * BDRV_SECTOR_SIZE); 1273a844a2b0SKevin Wolf return offset / BDRV_SECTOR_SIZE; 127461f0ed1dSFam Zheng } 127561f0ed1dSFam Zheng 1276b6b8a333SPaolo Bonzini static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs, 127767a0fd2aSFam Zheng int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file) 1278019d6b8fSAnthony Liguori { 1279019d6b8fSAnthony Liguori BDRVVmdkState *s = bs->opaque; 1280b3976d3cSFam Zheng int64_t index_in_cluster, n, ret; 1281b3976d3cSFam Zheng uint64_t offset; 1282b3976d3cSFam Zheng VmdkExtent *extent; 1283b3976d3cSFam Zheng 1284b3976d3cSFam Zheng extent = find_extent(s, sector_num, NULL); 1285b3976d3cSFam Zheng if (!extent) { 1286b3976d3cSFam Zheng return 0; 1287b3976d3cSFam Zheng } 1288f8a2e5e3SStefan Hajnoczi qemu_co_mutex_lock(&s->lock); 128991b85bd3SFam Zheng ret = get_cluster_offset(bs, extent, NULL, 1290c6ac36e1SFam Zheng sector_num * 512, false, &offset, 1291c6ac36e1SFam Zheng 0, 0); 1292f8a2e5e3SStefan Hajnoczi qemu_co_mutex_unlock(&s->lock); 129314ead646SFam Zheng 1294d0a18f10SFam Zheng index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num); 12954bc74be9SPaolo Bonzini switch (ret) { 12964bc74be9SPaolo Bonzini case VMDK_ERROR: 12974bc74be9SPaolo Bonzini ret = -EIO; 12984bc74be9SPaolo Bonzini break; 12994bc74be9SPaolo Bonzini case VMDK_UNALLOC: 13004bc74be9SPaolo Bonzini ret = 0; 13014bc74be9SPaolo Bonzini break; 13024bc74be9SPaolo Bonzini case VMDK_ZEROED: 13034bc74be9SPaolo Bonzini ret = BDRV_BLOCK_ZERO; 13044bc74be9SPaolo Bonzini break; 13054bc74be9SPaolo Bonzini case VMDK_OK: 13064bc74be9SPaolo Bonzini ret = BDRV_BLOCK_DATA; 1307e0f100f5SFam Zheng if (!extent->compressed) { 1308d0a18f10SFam Zheng ret |= BDRV_BLOCK_OFFSET_VALID; 1309d0a18f10SFam Zheng ret |= (offset + (index_in_cluster << BDRV_SECTOR_BITS)) 1310d0a18f10SFam Zheng & BDRV_BLOCK_OFFSET_MASK; 13114bc74be9SPaolo Bonzini } 1312e0f100f5SFam Zheng *file = extent->file->bs; 13134bc74be9SPaolo Bonzini break; 13144bc74be9SPaolo Bonzini } 131591b85bd3SFam Zheng 1316b3976d3cSFam Zheng n = extent->cluster_sectors - index_in_cluster; 1317ae261c86SFam Zheng if (n > nb_sectors) { 1318019d6b8fSAnthony Liguori n = nb_sectors; 1319ae261c86SFam Zheng } 1320019d6b8fSAnthony Liguori *pnum = n; 1321b3976d3cSFam Zheng return ret; 1322019d6b8fSAnthony Liguori } 1323019d6b8fSAnthony Liguori 1324dd3f6ee2SFam Zheng static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, 132537b1d7d8SKevin Wolf int64_t offset_in_cluster, QEMUIOVector *qiov, 132637b1d7d8SKevin Wolf uint64_t qiov_offset, uint64_t n_bytes, 132737b1d7d8SKevin Wolf uint64_t offset) 1328dd3f6ee2SFam Zheng { 1329dd3f6ee2SFam Zheng int ret; 13302b2c8c5dSFam Zheng VmdkGrainMarker *data = NULL; 13312b2c8c5dSFam Zheng uLongf buf_len; 133237b1d7d8SKevin Wolf QEMUIOVector local_qiov; 133337b1d7d8SKevin Wolf struct iovec iov; 13345e82a31eSFam Zheng int64_t write_offset; 13355e82a31eSFam Zheng int64_t write_end_sector; 1336dd3f6ee2SFam Zheng 13372b2c8c5dSFam Zheng if (extent->compressed) { 133837b1d7d8SKevin Wolf void *compressed_data; 133937b1d7d8SKevin Wolf 13402b2c8c5dSFam Zheng if (!extent->has_marker) { 13412b2c8c5dSFam Zheng ret = -EINVAL; 13422b2c8c5dSFam Zheng goto out; 13432b2c8c5dSFam Zheng } 13442b2c8c5dSFam Zheng buf_len = (extent->cluster_sectors << 9) * 2; 13452b2c8c5dSFam Zheng data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); 134637b1d7d8SKevin Wolf 134737b1d7d8SKevin Wolf compressed_data = g_malloc(n_bytes); 134837b1d7d8SKevin Wolf qemu_iovec_to_buf(qiov, qiov_offset, compressed_data, n_bytes); 134937b1d7d8SKevin Wolf ret = compress(data->data, &buf_len, compressed_data, n_bytes); 135037b1d7d8SKevin Wolf g_free(compressed_data); 135137b1d7d8SKevin Wolf 135237b1d7d8SKevin Wolf if (ret != Z_OK || buf_len == 0) { 13532b2c8c5dSFam Zheng ret = -EINVAL; 13542b2c8c5dSFam Zheng goto out; 13552b2c8c5dSFam Zheng } 13565e82a31eSFam Zheng 135737b1d7d8SKevin Wolf data->lba = offset >> BDRV_SECTOR_BITS; 135837b1d7d8SKevin Wolf data->size = buf_len; 135937b1d7d8SKevin Wolf 136037b1d7d8SKevin Wolf n_bytes = buf_len + sizeof(VmdkGrainMarker); 136137b1d7d8SKevin Wolf iov = (struct iovec) { 136237b1d7d8SKevin Wolf .iov_base = data, 136337b1d7d8SKevin Wolf .iov_len = n_bytes, 136437b1d7d8SKevin Wolf }; 136537b1d7d8SKevin Wolf qemu_iovec_init_external(&local_qiov, &iov, 1); 136637b1d7d8SKevin Wolf } else { 136737b1d7d8SKevin Wolf qemu_iovec_init(&local_qiov, qiov->niov); 136837b1d7d8SKevin Wolf qemu_iovec_concat(&local_qiov, qiov, qiov_offset, n_bytes); 136937b1d7d8SKevin Wolf } 137037b1d7d8SKevin Wolf 137137b1d7d8SKevin Wolf write_offset = cluster_offset + offset_in_cluster, 1372a03ef88fSKevin Wolf ret = bdrv_co_pwritev(extent->file, write_offset, n_bytes, 137337b1d7d8SKevin Wolf &local_qiov, 0); 137437b1d7d8SKevin Wolf 137537b1d7d8SKevin Wolf write_end_sector = DIV_ROUND_UP(write_offset + n_bytes, BDRV_SECTOR_SIZE); 13765e82a31eSFam Zheng 13773efffc32SRadoslav Gerganov if (extent->compressed) { 13783efffc32SRadoslav Gerganov extent->next_cluster_sector = write_end_sector; 13793efffc32SRadoslav Gerganov } else { 13805e82a31eSFam Zheng extent->next_cluster_sector = MAX(extent->next_cluster_sector, 13815e82a31eSFam Zheng write_end_sector); 13823efffc32SRadoslav Gerganov } 13835e82a31eSFam Zheng 138437b1d7d8SKevin Wolf if (ret < 0) { 1385dd3f6ee2SFam Zheng goto out; 1386dd3f6ee2SFam Zheng } 1387dd3f6ee2SFam Zheng ret = 0; 1388dd3f6ee2SFam Zheng out: 13892b2c8c5dSFam Zheng g_free(data); 139037b1d7d8SKevin Wolf if (!extent->compressed) { 139137b1d7d8SKevin Wolf qemu_iovec_destroy(&local_qiov); 139237b1d7d8SKevin Wolf } 1393dd3f6ee2SFam Zheng return ret; 1394dd3f6ee2SFam Zheng } 1395dd3f6ee2SFam Zheng 1396dd3f6ee2SFam Zheng static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, 1397f10cc243SKevin Wolf int64_t offset_in_cluster, QEMUIOVector *qiov, 1398f10cc243SKevin Wolf int bytes) 1399dd3f6ee2SFam Zheng { 1400dd3f6ee2SFam Zheng int ret; 14012b2c8c5dSFam Zheng int cluster_bytes, buf_bytes; 14022b2c8c5dSFam Zheng uint8_t *cluster_buf, *compressed_data; 14032b2c8c5dSFam Zheng uint8_t *uncomp_buf; 14042b2c8c5dSFam Zheng uint32_t data_len; 14052b2c8c5dSFam Zheng VmdkGrainMarker *marker; 14062b2c8c5dSFam Zheng uLongf buf_len; 1407dd3f6ee2SFam Zheng 14082b2c8c5dSFam Zheng 14092b2c8c5dSFam Zheng if (!extent->compressed) { 1410a03ef88fSKevin Wolf ret = bdrv_co_preadv(extent->file, 1411f10cc243SKevin Wolf cluster_offset + offset_in_cluster, bytes, 1412f10cc243SKevin Wolf qiov, 0); 1413f10cc243SKevin Wolf if (ret < 0) { 1414f10cc243SKevin Wolf return ret; 1415dd3f6ee2SFam Zheng } 1416f10cc243SKevin Wolf return 0; 1417dd3f6ee2SFam Zheng } 14182b2c8c5dSFam Zheng cluster_bytes = extent->cluster_sectors * 512; 14192b2c8c5dSFam Zheng /* Read two clusters in case GrainMarker + compressed data > one cluster */ 14202b2c8c5dSFam Zheng buf_bytes = cluster_bytes * 2; 14212b2c8c5dSFam Zheng cluster_buf = g_malloc(buf_bytes); 14222b2c8c5dSFam Zheng uncomp_buf = g_malloc(cluster_bytes); 1423cf2ab8fcSKevin Wolf ret = bdrv_pread(extent->file, 14242b2c8c5dSFam Zheng cluster_offset, 14252b2c8c5dSFam Zheng cluster_buf, buf_bytes); 14262b2c8c5dSFam Zheng if (ret < 0) { 14272b2c8c5dSFam Zheng goto out; 14282b2c8c5dSFam Zheng } 14292b2c8c5dSFam Zheng compressed_data = cluster_buf; 14302b2c8c5dSFam Zheng buf_len = cluster_bytes; 14312b2c8c5dSFam Zheng data_len = cluster_bytes; 14322b2c8c5dSFam Zheng if (extent->has_marker) { 14332b2c8c5dSFam Zheng marker = (VmdkGrainMarker *)cluster_buf; 14342b2c8c5dSFam Zheng compressed_data = marker->data; 14352b2c8c5dSFam Zheng data_len = le32_to_cpu(marker->size); 14362b2c8c5dSFam Zheng } 14372b2c8c5dSFam Zheng if (!data_len || data_len > buf_bytes) { 14382b2c8c5dSFam Zheng ret = -EINVAL; 14392b2c8c5dSFam Zheng goto out; 14402b2c8c5dSFam Zheng } 14412b2c8c5dSFam Zheng ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); 14422b2c8c5dSFam Zheng if (ret != Z_OK) { 14432b2c8c5dSFam Zheng ret = -EINVAL; 14442b2c8c5dSFam Zheng goto out; 14452b2c8c5dSFam Zheng 14462b2c8c5dSFam Zheng } 14472b2c8c5dSFam Zheng if (offset_in_cluster < 0 || 1448f10cc243SKevin Wolf offset_in_cluster + bytes > buf_len) { 14492b2c8c5dSFam Zheng ret = -EINVAL; 14502b2c8c5dSFam Zheng goto out; 14512b2c8c5dSFam Zheng } 1452f10cc243SKevin Wolf qemu_iovec_from_buf(qiov, 0, uncomp_buf + offset_in_cluster, bytes); 14532b2c8c5dSFam Zheng ret = 0; 14542b2c8c5dSFam Zheng 14552b2c8c5dSFam Zheng out: 14562b2c8c5dSFam Zheng g_free(uncomp_buf); 14572b2c8c5dSFam Zheng g_free(cluster_buf); 14582b2c8c5dSFam Zheng return ret; 14592b2c8c5dSFam Zheng } 1460dd3f6ee2SFam Zheng 1461f10cc243SKevin Wolf static int coroutine_fn 1462f10cc243SKevin Wolf vmdk_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, 1463f10cc243SKevin Wolf QEMUIOVector *qiov, int flags) 1464019d6b8fSAnthony Liguori { 1465019d6b8fSAnthony Liguori BDRVVmdkState *s = bs->opaque; 1466b3976d3cSFam Zheng int ret; 1467f10cc243SKevin Wolf uint64_t n_bytes, offset_in_cluster; 1468b3976d3cSFam Zheng VmdkExtent *extent = NULL; 1469f10cc243SKevin Wolf QEMUIOVector local_qiov; 1470019d6b8fSAnthony Liguori uint64_t cluster_offset; 1471f10cc243SKevin Wolf uint64_t bytes_done = 0; 1472019d6b8fSAnthony Liguori 1473f10cc243SKevin Wolf qemu_iovec_init(&local_qiov, qiov->niov); 1474f10cc243SKevin Wolf qemu_co_mutex_lock(&s->lock); 1475f10cc243SKevin Wolf 1476f10cc243SKevin Wolf while (bytes > 0) { 1477f10cc243SKevin Wolf extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); 1478b3976d3cSFam Zheng if (!extent) { 1479f10cc243SKevin Wolf ret = -EIO; 1480f10cc243SKevin Wolf goto fail; 1481b3976d3cSFam Zheng } 1482c6ac36e1SFam Zheng ret = get_cluster_offset(bs, extent, NULL, 1483f10cc243SKevin Wolf offset, false, &cluster_offset, 0, 0); 1484f10cc243SKevin Wolf offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); 1485f10cc243SKevin Wolf 1486f10cc243SKevin Wolf n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE 1487f10cc243SKevin Wolf - offset_in_cluster); 1488f10cc243SKevin Wolf 148914ead646SFam Zheng if (ret != VMDK_OK) { 149091b85bd3SFam Zheng /* if not allocated, try to read from parent image, if exist */ 1491760e0063SKevin Wolf if (bs->backing && ret != VMDK_ZEROED) { 1492ae261c86SFam Zheng if (!vmdk_is_cid_valid(bs)) { 1493f10cc243SKevin Wolf ret = -EINVAL; 1494f10cc243SKevin Wolf goto fail; 1495019d6b8fSAnthony Liguori } 1496019d6b8fSAnthony Liguori 1497f10cc243SKevin Wolf qemu_iovec_reset(&local_qiov); 1498f10cc243SKevin Wolf qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); 1499f10cc243SKevin Wolf 1500a03ef88fSKevin Wolf ret = bdrv_co_preadv(bs->backing, offset, n_bytes, 1501f10cc243SKevin Wolf &local_qiov, 0); 1502f10cc243SKevin Wolf if (ret < 0) { 1503f10cc243SKevin Wolf goto fail; 1504f10cc243SKevin Wolf } 1505f10cc243SKevin Wolf } else { 1506f10cc243SKevin Wolf qemu_iovec_memset(qiov, bytes_done, 0, n_bytes); 1507f10cc243SKevin Wolf } 1508f10cc243SKevin Wolf } else { 1509f10cc243SKevin Wolf qemu_iovec_reset(&local_qiov); 1510f10cc243SKevin Wolf qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); 1511f10cc243SKevin Wolf 1512f10cc243SKevin Wolf ret = vmdk_read_extent(extent, cluster_offset, offset_in_cluster, 1513f10cc243SKevin Wolf &local_qiov, n_bytes); 1514f10cc243SKevin Wolf if (ret) { 1515f10cc243SKevin Wolf goto fail; 1516f10cc243SKevin Wolf } 1517f10cc243SKevin Wolf } 1518f10cc243SKevin Wolf bytes -= n_bytes; 1519f10cc243SKevin Wolf offset += n_bytes; 1520f10cc243SKevin Wolf bytes_done += n_bytes; 1521f10cc243SKevin Wolf } 1522f10cc243SKevin Wolf 1523f10cc243SKevin Wolf ret = 0; 1524f10cc243SKevin Wolf fail: 15252914caa0SPaolo Bonzini qemu_co_mutex_unlock(&s->lock); 1526f10cc243SKevin Wolf qemu_iovec_destroy(&local_qiov); 1527f10cc243SKevin Wolf 15282914caa0SPaolo Bonzini return ret; 15292914caa0SPaolo Bonzini } 15302914caa0SPaolo Bonzini 1531cdeaf1f1SFam Zheng /** 1532cdeaf1f1SFam Zheng * vmdk_write: 1533cdeaf1f1SFam Zheng * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature 1534cdeaf1f1SFam Zheng * if possible, otherwise return -ENOTSUP. 15358e507243SFam Zheng * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try 15368e507243SFam Zheng * with each cluster. By dry run we can find if the zero write 15378e507243SFam Zheng * is possible without modifying image data. 1538cdeaf1f1SFam Zheng * 1539cdeaf1f1SFam Zheng * Returns: error code with 0 for success. 1540cdeaf1f1SFam Zheng */ 154137b1d7d8SKevin Wolf static int vmdk_pwritev(BlockDriverState *bs, uint64_t offset, 154237b1d7d8SKevin Wolf uint64_t bytes, QEMUIOVector *qiov, 1543cdeaf1f1SFam Zheng bool zeroed, bool zero_dry_run) 1544019d6b8fSAnthony Liguori { 1545019d6b8fSAnthony Liguori BDRVVmdkState *s = bs->opaque; 1546b3976d3cSFam Zheng VmdkExtent *extent = NULL; 1547585ea0c8SFam Zheng int ret; 154837b1d7d8SKevin Wolf int64_t offset_in_cluster, n_bytes; 1549019d6b8fSAnthony Liguori uint64_t cluster_offset; 155037b1d7d8SKevin Wolf uint64_t bytes_done = 0; 1551b3976d3cSFam Zheng VmdkMetaData m_data; 1552019d6b8fSAnthony Liguori 155337b1d7d8SKevin Wolf if (DIV_ROUND_UP(offset, BDRV_SECTOR_SIZE) > bs->total_sectors) { 155437b1d7d8SKevin Wolf error_report("Wrong offset: offset=0x%" PRIx64 15559af9e0feSMarkus Armbruster " total_sectors=0x%" PRIx64, 155637b1d7d8SKevin Wolf offset, bs->total_sectors); 15577fa60fa3SFam Zheng return -EIO; 1558019d6b8fSAnthony Liguori } 1559019d6b8fSAnthony Liguori 156037b1d7d8SKevin Wolf while (bytes > 0) { 156137b1d7d8SKevin Wolf extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); 1562b3976d3cSFam Zheng if (!extent) { 1563b3976d3cSFam Zheng return -EIO; 1564b3976d3cSFam Zheng } 156537b1d7d8SKevin Wolf offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); 156637b1d7d8SKevin Wolf n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE 156737b1d7d8SKevin Wolf - offset_in_cluster); 156837b1d7d8SKevin Wolf 156937b1d7d8SKevin Wolf ret = get_cluster_offset(bs, extent, &m_data, offset, 1570c6ac36e1SFam Zheng !(extent->compressed || zeroed), 157137b1d7d8SKevin Wolf &cluster_offset, offset_in_cluster, 157237b1d7d8SKevin Wolf offset_in_cluster + n_bytes); 15732b2c8c5dSFam Zheng if (extent->compressed) { 157465f74725SFam Zheng if (ret == VMDK_OK) { 15752b2c8c5dSFam Zheng /* Refuse write to allocated cluster for streamOptimized */ 15764823970bSFam Zheng error_report("Could not write to allocated cluster" 15774823970bSFam Zheng " for streamOptimized"); 15782b2c8c5dSFam Zheng return -EIO; 15792b2c8c5dSFam Zheng } else { 15802b2c8c5dSFam Zheng /* allocate */ 158137b1d7d8SKevin Wolf ret = get_cluster_offset(bs, extent, &m_data, offset, 1582c6ac36e1SFam Zheng true, &cluster_offset, 0, 0); 15832b2c8c5dSFam Zheng } 15842b2c8c5dSFam Zheng } 1585cdeaf1f1SFam Zheng if (ret == VMDK_ERROR) { 158691b85bd3SFam Zheng return -EINVAL; 1587b3976d3cSFam Zheng } 1588cdeaf1f1SFam Zheng if (zeroed) { 1589cdeaf1f1SFam Zheng /* Do zeroed write, buf is ignored */ 1590cdeaf1f1SFam Zheng if (extent->has_zero_grain && 159137b1d7d8SKevin Wolf offset_in_cluster == 0 && 159237b1d7d8SKevin Wolf n_bytes >= extent->cluster_sectors * BDRV_SECTOR_SIZE) { 159337b1d7d8SKevin Wolf n_bytes = extent->cluster_sectors * BDRV_SECTOR_SIZE; 1594cdeaf1f1SFam Zheng if (!zero_dry_run) { 1595cdeaf1f1SFam Zheng /* update L2 tables */ 1596c6ac36e1SFam Zheng if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED) 1597c6ac36e1SFam Zheng != VMDK_OK) { 1598cdeaf1f1SFam Zheng return -EIO; 1599cdeaf1f1SFam Zheng } 1600cdeaf1f1SFam Zheng } 1601cdeaf1f1SFam Zheng } else { 1602cdeaf1f1SFam Zheng return -ENOTSUP; 1603cdeaf1f1SFam Zheng } 1604cdeaf1f1SFam Zheng } else { 160537b1d7d8SKevin Wolf ret = vmdk_write_extent(extent, cluster_offset, offset_in_cluster, 160637b1d7d8SKevin Wolf qiov, bytes_done, n_bytes, offset); 1607dd3f6ee2SFam Zheng if (ret) { 16087fa60fa3SFam Zheng return ret; 1609b3976d3cSFam Zheng } 1610019d6b8fSAnthony Liguori if (m_data.valid) { 1611019d6b8fSAnthony Liguori /* update L2 tables */ 1612c6ac36e1SFam Zheng if (vmdk_L2update(extent, &m_data, 1613c6ac36e1SFam Zheng cluster_offset >> BDRV_SECTOR_BITS) 1614c6ac36e1SFam Zheng != VMDK_OK) { 16157fa60fa3SFam Zheng return -EIO; 1616019d6b8fSAnthony Liguori } 1617b3976d3cSFam Zheng } 1618cdeaf1f1SFam Zheng } 161937b1d7d8SKevin Wolf bytes -= n_bytes; 162037b1d7d8SKevin Wolf offset += n_bytes; 162137b1d7d8SKevin Wolf bytes_done += n_bytes; 1622019d6b8fSAnthony Liguori 1623ae261c86SFam Zheng /* update CID on the first write every time the virtual disk is 1624ae261c86SFam Zheng * opened */ 162569b4d86dSFam Zheng if (!s->cid_updated) { 1626e5dc64b8SFam Zheng ret = vmdk_write_cid(bs, g_random_int()); 162799f1835dSKevin Wolf if (ret < 0) { 162899f1835dSKevin Wolf return ret; 162999f1835dSKevin Wolf } 163069b4d86dSFam Zheng s->cid_updated = true; 1631019d6b8fSAnthony Liguori } 1632019d6b8fSAnthony Liguori } 1633019d6b8fSAnthony Liguori return 0; 1634019d6b8fSAnthony Liguori } 1635019d6b8fSAnthony Liguori 163637b1d7d8SKevin Wolf static int coroutine_fn 163737b1d7d8SKevin Wolf vmdk_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, 163837b1d7d8SKevin Wolf QEMUIOVector *qiov, int flags) 1639e183ef75SPaolo Bonzini { 1640e183ef75SPaolo Bonzini int ret; 1641e183ef75SPaolo Bonzini BDRVVmdkState *s = bs->opaque; 1642e183ef75SPaolo Bonzini qemu_co_mutex_lock(&s->lock); 164337b1d7d8SKevin Wolf ret = vmdk_pwritev(bs, offset, bytes, qiov, false, false); 1644cdeaf1f1SFam Zheng qemu_co_mutex_unlock(&s->lock); 1645cdeaf1f1SFam Zheng return ret; 1646cdeaf1f1SFam Zheng } 1647cdeaf1f1SFam Zheng 164837b1d7d8SKevin Wolf typedef struct VmdkWriteCompressedCo { 164937b1d7d8SKevin Wolf BlockDriverState *bs; 165037b1d7d8SKevin Wolf int64_t sector_num; 165137b1d7d8SKevin Wolf const uint8_t *buf; 165237b1d7d8SKevin Wolf int nb_sectors; 165337b1d7d8SKevin Wolf int ret; 165437b1d7d8SKevin Wolf } VmdkWriteCompressedCo; 165537b1d7d8SKevin Wolf 165637b1d7d8SKevin Wolf static void vmdk_co_write_compressed(void *opaque) 165737b1d7d8SKevin Wolf { 165837b1d7d8SKevin Wolf VmdkWriteCompressedCo *co = opaque; 165937b1d7d8SKevin Wolf QEMUIOVector local_qiov; 166037b1d7d8SKevin Wolf uint64_t offset = co->sector_num * BDRV_SECTOR_SIZE; 166137b1d7d8SKevin Wolf uint64_t bytes = co->nb_sectors * BDRV_SECTOR_SIZE; 166237b1d7d8SKevin Wolf 166337b1d7d8SKevin Wolf struct iovec iov = (struct iovec) { 166437b1d7d8SKevin Wolf .iov_base = (uint8_t*) co->buf, 166537b1d7d8SKevin Wolf .iov_len = bytes, 166637b1d7d8SKevin Wolf }; 166737b1d7d8SKevin Wolf qemu_iovec_init_external(&local_qiov, &iov, 1); 166837b1d7d8SKevin Wolf 166937b1d7d8SKevin Wolf co->ret = vmdk_pwritev(co->bs, offset, bytes, &local_qiov, false, false); 167037b1d7d8SKevin Wolf } 167137b1d7d8SKevin Wolf 1672ba0ad89eSFam Zheng static int vmdk_write_compressed(BlockDriverState *bs, 1673ba0ad89eSFam Zheng int64_t sector_num, 1674ba0ad89eSFam Zheng const uint8_t *buf, 1675ba0ad89eSFam Zheng int nb_sectors) 1676ba0ad89eSFam Zheng { 1677ba0ad89eSFam Zheng BDRVVmdkState *s = bs->opaque; 167837b1d7d8SKevin Wolf 1679ba0ad89eSFam Zheng if (s->num_extents == 1 && s->extents[0].compressed) { 168037b1d7d8SKevin Wolf Coroutine *co; 168137b1d7d8SKevin Wolf AioContext *aio_context = bdrv_get_aio_context(bs); 168237b1d7d8SKevin Wolf VmdkWriteCompressedCo data = { 168337b1d7d8SKevin Wolf .bs = bs, 168437b1d7d8SKevin Wolf .sector_num = sector_num, 168537b1d7d8SKevin Wolf .buf = buf, 168637b1d7d8SKevin Wolf .nb_sectors = nb_sectors, 168737b1d7d8SKevin Wolf .ret = -EINPROGRESS, 168837b1d7d8SKevin Wolf }; 16890b8b8753SPaolo Bonzini co = qemu_coroutine_create(vmdk_co_write_compressed, &data); 16900b8b8753SPaolo Bonzini qemu_coroutine_enter(co); 169137b1d7d8SKevin Wolf while (data.ret == -EINPROGRESS) { 169237b1d7d8SKevin Wolf aio_poll(aio_context, true); 169337b1d7d8SKevin Wolf } 169437b1d7d8SKevin Wolf return data.ret; 1695ba0ad89eSFam Zheng } else { 1696ba0ad89eSFam Zheng return -ENOTSUP; 1697ba0ad89eSFam Zheng } 1698ba0ad89eSFam Zheng } 1699ba0ad89eSFam Zheng 1700a620f2aeSEric Blake static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs, 1701a620f2aeSEric Blake int64_t offset, 1702a620f2aeSEric Blake int bytes, 1703aa7bfbffSPeter Lieven BdrvRequestFlags flags) 1704cdeaf1f1SFam Zheng { 1705cdeaf1f1SFam Zheng int ret; 1706cdeaf1f1SFam Zheng BDRVVmdkState *s = bs->opaque; 170737b1d7d8SKevin Wolf 1708cdeaf1f1SFam Zheng qemu_co_mutex_lock(&s->lock); 17098e507243SFam Zheng /* write zeroes could fail if sectors not aligned to cluster, test it with 17108e507243SFam Zheng * dry_run == true before really updating image */ 171137b1d7d8SKevin Wolf ret = vmdk_pwritev(bs, offset, bytes, NULL, true, true); 1712cdeaf1f1SFam Zheng if (!ret) { 171337b1d7d8SKevin Wolf ret = vmdk_pwritev(bs, offset, bytes, NULL, true, false); 1714cdeaf1f1SFam Zheng } 1715e183ef75SPaolo Bonzini qemu_co_mutex_unlock(&s->lock); 1716e183ef75SPaolo Bonzini return ret; 1717e183ef75SPaolo Bonzini } 1718e183ef75SPaolo Bonzini 17196c031aacSFam Zheng static int vmdk_create_extent(const char *filename, int64_t filesize, 1720917703c1SFam Zheng bool flat, bool compress, bool zeroed_grain, 17214ab15590SChunyan Liu QemuOpts *opts, Error **errp) 1722019d6b8fSAnthony Liguori { 1723f66fd6c3SFam Zheng int ret, i; 1724c4bea169SKevin Wolf BlockBackend *blk = NULL; 1725019d6b8fSAnthony Liguori VMDK4Header header; 1726c13959c7SFam Zheng Error *local_err = NULL; 1727917703c1SFam Zheng uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count; 1728917703c1SFam Zheng uint32_t *gd_buf = NULL; 1729917703c1SFam Zheng int gd_buf_size; 17300e7e1989SKevin Wolf 17314ab15590SChunyan Liu ret = bdrv_create_file(filename, opts, &local_err); 1732f66fd6c3SFam Zheng if (ret < 0) { 1733917703c1SFam Zheng error_propagate(errp, local_err); 1734917703c1SFam Zheng goto exit; 1735917703c1SFam Zheng } 1736917703c1SFam Zheng 1737efaa7c4eSMax Reitz blk = blk_new_open(filename, NULL, NULL, 173872e775c7SKevin Wolf BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err); 1739c4bea169SKevin Wolf if (blk == NULL) { 1740917703c1SFam Zheng error_propagate(errp, local_err); 1741c4bea169SKevin Wolf ret = -EIO; 1742917703c1SFam Zheng goto exit; 1743917703c1SFam Zheng } 1744917703c1SFam Zheng 1745c4bea169SKevin Wolf blk_set_allow_write_beyond_eof(blk, true); 1746c4bea169SKevin Wolf 1747917703c1SFam Zheng if (flat) { 1748c4bea169SKevin Wolf ret = blk_truncate(blk, filesize); 1749917703c1SFam Zheng if (ret < 0) { 175039a611a3SJeff Cody error_setg_errno(errp, -ret, "Could not truncate file"); 1751f66fd6c3SFam Zheng } 1752f66fd6c3SFam Zheng goto exit; 1753f66fd6c3SFam Zheng } 1754019d6b8fSAnthony Liguori magic = cpu_to_be32(VMDK4_MAGIC); 1755019d6b8fSAnthony Liguori memset(&header, 0, sizeof(header)); 1756d62d9dc4SFam Zheng if (compress) { 1757d62d9dc4SFam Zheng header.version = 3; 1758d62d9dc4SFam Zheng } else if (zeroed_grain) { 1759d62d9dc4SFam Zheng header.version = 2; 1760d62d9dc4SFam Zheng } else { 1761d62d9dc4SFam Zheng header.version = 1; 1762d62d9dc4SFam Zheng } 176395b0aa42SFam Zheng header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT 176469e0b6dfSFam Zheng | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) 176569e0b6dfSFam Zheng | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); 17666c031aacSFam Zheng header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; 1767917703c1SFam Zheng header.capacity = filesize / BDRV_SECTOR_SIZE; 176816372ff0SAlexander Graf header.granularity = 128; 1769917703c1SFam Zheng header.num_gtes_per_gt = BDRV_SECTOR_SIZE; 1770019d6b8fSAnthony Liguori 1771917703c1SFam Zheng grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity); 1772917703c1SFam Zheng gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t), 1773917703c1SFam Zheng BDRV_SECTOR_SIZE); 1774917703c1SFam Zheng gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt); 1775917703c1SFam Zheng gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE); 1776019d6b8fSAnthony Liguori 1777019d6b8fSAnthony Liguori header.desc_offset = 1; 1778019d6b8fSAnthony Liguori header.desc_size = 20; 1779019d6b8fSAnthony Liguori header.rgd_offset = header.desc_offset + header.desc_size; 1780917703c1SFam Zheng header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count); 1781019d6b8fSAnthony Liguori header.grain_offset = 1782917703c1SFam Zheng ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count), 1783917703c1SFam Zheng header.granularity); 178416372ff0SAlexander Graf /* swap endianness for all header fields */ 178516372ff0SAlexander Graf header.version = cpu_to_le32(header.version); 178616372ff0SAlexander Graf header.flags = cpu_to_le32(header.flags); 178716372ff0SAlexander Graf header.capacity = cpu_to_le64(header.capacity); 178816372ff0SAlexander Graf header.granularity = cpu_to_le64(header.granularity); 1789ca8804ceSFam Zheng header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt); 1790019d6b8fSAnthony Liguori header.desc_offset = cpu_to_le64(header.desc_offset); 1791019d6b8fSAnthony Liguori header.desc_size = cpu_to_le64(header.desc_size); 1792019d6b8fSAnthony Liguori header.rgd_offset = cpu_to_le64(header.rgd_offset); 1793019d6b8fSAnthony Liguori header.gd_offset = cpu_to_le64(header.gd_offset); 1794019d6b8fSAnthony Liguori header.grain_offset = cpu_to_le64(header.grain_offset); 17956c031aacSFam Zheng header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); 1796019d6b8fSAnthony Liguori 1797019d6b8fSAnthony Liguori header.check_bytes[0] = 0xa; 1798019d6b8fSAnthony Liguori header.check_bytes[1] = 0x20; 1799019d6b8fSAnthony Liguori header.check_bytes[2] = 0xd; 1800019d6b8fSAnthony Liguori header.check_bytes[3] = 0xa; 1801019d6b8fSAnthony Liguori 1802019d6b8fSAnthony Liguori /* write all the data */ 18038341f00dSEric Blake ret = blk_pwrite(blk, 0, &magic, sizeof(magic), 0); 1804917703c1SFam Zheng if (ret < 0) { 1805c6bd8c70SMarkus Armbruster error_setg(errp, QERR_IO_ERROR); 18061640366cSKirill A. Shutemov goto exit; 18071640366cSKirill A. Shutemov } 18088341f00dSEric Blake ret = blk_pwrite(blk, sizeof(magic), &header, sizeof(header), 0); 1809917703c1SFam Zheng if (ret < 0) { 1810c6bd8c70SMarkus Armbruster error_setg(errp, QERR_IO_ERROR); 18111640366cSKirill A. Shutemov goto exit; 18121640366cSKirill A. Shutemov } 1813019d6b8fSAnthony Liguori 1814c4bea169SKevin Wolf ret = blk_truncate(blk, le64_to_cpu(header.grain_offset) << 9); 18151640366cSKirill A. Shutemov if (ret < 0) { 181639a611a3SJeff Cody error_setg_errno(errp, -ret, "Could not truncate file"); 18171640366cSKirill A. Shutemov goto exit; 18181640366cSKirill A. Shutemov } 1819019d6b8fSAnthony Liguori 1820019d6b8fSAnthony Liguori /* write grain directory */ 1821917703c1SFam Zheng gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE; 1822917703c1SFam Zheng gd_buf = g_malloc0(gd_buf_size); 1823917703c1SFam Zheng for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors; 18241640366cSKirill A. Shutemov i < gt_count; i++, tmp += gt_size) { 1825917703c1SFam Zheng gd_buf[i] = cpu_to_le32(tmp); 18261640366cSKirill A. Shutemov } 1827c4bea169SKevin Wolf ret = blk_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, 18288341f00dSEric Blake gd_buf, gd_buf_size, 0); 1829917703c1SFam Zheng if (ret < 0) { 1830c6bd8c70SMarkus Armbruster error_setg(errp, QERR_IO_ERROR); 1831917703c1SFam Zheng goto exit; 18321640366cSKirill A. Shutemov } 1833019d6b8fSAnthony Liguori 1834019d6b8fSAnthony Liguori /* write backup grain directory */ 1835917703c1SFam Zheng for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors; 18361640366cSKirill A. Shutemov i < gt_count; i++, tmp += gt_size) { 1837917703c1SFam Zheng gd_buf[i] = cpu_to_le32(tmp); 18381640366cSKirill A. Shutemov } 1839c4bea169SKevin Wolf ret = blk_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, 18408341f00dSEric Blake gd_buf, gd_buf_size, 0); 1841917703c1SFam Zheng if (ret < 0) { 1842c6bd8c70SMarkus Armbruster error_setg(errp, QERR_IO_ERROR); 1843917703c1SFam Zheng goto exit; 18441640366cSKirill A. Shutemov } 1845019d6b8fSAnthony Liguori 1846f66fd6c3SFam Zheng ret = 0; 1847f66fd6c3SFam Zheng exit: 1848c4bea169SKevin Wolf if (blk) { 1849c4bea169SKevin Wolf blk_unref(blk); 1850917703c1SFam Zheng } 1851917703c1SFam Zheng g_free(gd_buf); 1852f66fd6c3SFam Zheng return ret; 1853f66fd6c3SFam Zheng } 1854019d6b8fSAnthony Liguori 1855f66fd6c3SFam Zheng static int filename_decompose(const char *filename, char *path, char *prefix, 18564823970bSFam Zheng char *postfix, size_t buf_len, Error **errp) 1857f66fd6c3SFam Zheng { 1858f66fd6c3SFam Zheng const char *p, *q; 1859f66fd6c3SFam Zheng 1860f66fd6c3SFam Zheng if (filename == NULL || !strlen(filename)) { 18614823970bSFam Zheng error_setg(errp, "No filename provided"); 186265f74725SFam Zheng return VMDK_ERROR; 1863f66fd6c3SFam Zheng } 1864f66fd6c3SFam Zheng p = strrchr(filename, '/'); 1865f66fd6c3SFam Zheng if (p == NULL) { 1866f66fd6c3SFam Zheng p = strrchr(filename, '\\'); 1867f66fd6c3SFam Zheng } 1868f66fd6c3SFam Zheng if (p == NULL) { 1869f66fd6c3SFam Zheng p = strrchr(filename, ':'); 1870f66fd6c3SFam Zheng } 1871f66fd6c3SFam Zheng if (p != NULL) { 1872f66fd6c3SFam Zheng p++; 1873f66fd6c3SFam Zheng if (p - filename >= buf_len) { 187465f74725SFam Zheng return VMDK_ERROR; 1875f66fd6c3SFam Zheng } 1876f66fd6c3SFam Zheng pstrcpy(path, p - filename + 1, filename); 1877f66fd6c3SFam Zheng } else { 1878f66fd6c3SFam Zheng p = filename; 1879f66fd6c3SFam Zheng path[0] = '\0'; 1880f66fd6c3SFam Zheng } 1881f66fd6c3SFam Zheng q = strrchr(p, '.'); 1882f66fd6c3SFam Zheng if (q == NULL) { 1883f66fd6c3SFam Zheng pstrcpy(prefix, buf_len, p); 1884f66fd6c3SFam Zheng postfix[0] = '\0'; 1885f66fd6c3SFam Zheng } else { 1886f66fd6c3SFam Zheng if (q - p >= buf_len) { 188765f74725SFam Zheng return VMDK_ERROR; 1888f66fd6c3SFam Zheng } 1889f66fd6c3SFam Zheng pstrcpy(prefix, q - p + 1, p); 1890f66fd6c3SFam Zheng pstrcpy(postfix, buf_len, q); 1891f66fd6c3SFam Zheng } 189265f74725SFam Zheng return VMDK_OK; 1893f66fd6c3SFam Zheng } 1894f66fd6c3SFam Zheng 18955820f1daSChunyan Liu static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp) 1896f66fd6c3SFam Zheng { 1897917703c1SFam Zheng int idx = 0; 1898c4bea169SKevin Wolf BlockBackend *new_blk = NULL; 1899c13959c7SFam Zheng Error *local_err = NULL; 1900af057fe7SFam Zheng char *desc = NULL; 1901f66fd6c3SFam Zheng int64_t total_size = 0, filesize; 19025820f1daSChunyan Liu char *adapter_type = NULL; 19035820f1daSChunyan Liu char *backing_file = NULL; 1904f249924eSJanne Karhunen char *hw_version = NULL; 19055820f1daSChunyan Liu char *fmt = NULL; 1906f66fd6c3SFam Zheng int ret = 0; 19076c031aacSFam Zheng bool flat, split, compress; 1908af057fe7SFam Zheng GString *ext_desc_lines; 1909fe206562SJeff Cody char *path = g_malloc0(PATH_MAX); 1910fe206562SJeff Cody char *prefix = g_malloc0(PATH_MAX); 1911fe206562SJeff Cody char *postfix = g_malloc0(PATH_MAX); 1912fe206562SJeff Cody char *desc_line = g_malloc0(BUF_SIZE); 1913fe206562SJeff Cody char *ext_filename = g_malloc0(PATH_MAX); 1914fe206562SJeff Cody char *desc_filename = g_malloc0(PATH_MAX); 1915f66fd6c3SFam Zheng const int64_t split_size = 0x80000000; /* VMDK has constant split size */ 1916f66fd6c3SFam Zheng const char *desc_extent_line; 1917fe206562SJeff Cody char *parent_desc_line = g_malloc0(BUF_SIZE); 1918f66fd6c3SFam Zheng uint32_t parent_cid = 0xffffffff; 19197f2039f6SOthmar Pasteka uint32_t number_heads = 16; 192069e0b6dfSFam Zheng bool zeroed_grain = false; 1921917703c1SFam Zheng uint32_t desc_offset = 0, desc_len; 1922f66fd6c3SFam Zheng const char desc_template[] = 1923f66fd6c3SFam Zheng "# Disk DescriptorFile\n" 1924f66fd6c3SFam Zheng "version=1\n" 19259b17031aSFam Zheng "CID=%" PRIx32 "\n" 19269b17031aSFam Zheng "parentCID=%" PRIx32 "\n" 1927f66fd6c3SFam Zheng "createType=\"%s\"\n" 1928f66fd6c3SFam Zheng "%s" 1929f66fd6c3SFam Zheng "\n" 1930f66fd6c3SFam Zheng "# Extent description\n" 1931f66fd6c3SFam Zheng "%s" 1932f66fd6c3SFam Zheng "\n" 1933f66fd6c3SFam Zheng "# The Disk Data Base\n" 1934f66fd6c3SFam Zheng "#DDB\n" 1935f66fd6c3SFam Zheng "\n" 1936f249924eSJanne Karhunen "ddb.virtualHWVersion = \"%s\"\n" 1937f66fd6c3SFam Zheng "ddb.geometry.cylinders = \"%" PRId64 "\"\n" 19384ab9dab5SFam Zheng "ddb.geometry.heads = \"%" PRIu32 "\"\n" 1939f66fd6c3SFam Zheng "ddb.geometry.sectors = \"63\"\n" 19407f2039f6SOthmar Pasteka "ddb.adapterType = \"%s\"\n"; 1941f66fd6c3SFam Zheng 1942af057fe7SFam Zheng ext_desc_lines = g_string_new(NULL); 1943af057fe7SFam Zheng 19444823970bSFam Zheng if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) { 1945af057fe7SFam Zheng ret = -EINVAL; 1946af057fe7SFam Zheng goto exit; 1947f66fd6c3SFam Zheng } 1948f66fd6c3SFam Zheng /* Read out options */ 1949c2eb918eSHu Tao total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), 1950c2eb918eSHu Tao BDRV_SECTOR_SIZE); 19515820f1daSChunyan Liu adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE); 19525820f1daSChunyan Liu backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE); 1953f249924eSJanne Karhunen hw_version = qemu_opt_get_del(opts, BLOCK_OPT_HWVERSION); 19545820f1daSChunyan Liu if (qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false)) { 1955f249924eSJanne Karhunen if (strcmp(hw_version, "undefined")) { 1956f249924eSJanne Karhunen error_setg(errp, 1957f249924eSJanne Karhunen "compat6 cannot be enabled with hwversion set"); 1958f249924eSJanne Karhunen ret = -EINVAL; 1959f249924eSJanne Karhunen goto exit; 1960f249924eSJanne Karhunen } 1961f249924eSJanne Karhunen g_free(hw_version); 1962f249924eSJanne Karhunen hw_version = g_strdup("6"); 1963f249924eSJanne Karhunen } 1964f249924eSJanne Karhunen if (strcmp(hw_version, "undefined") == 0) { 1965f249924eSJanne Karhunen g_free(hw_version); 1966f249924eSJanne Karhunen hw_version = g_strdup("4"); 1967f66fd6c3SFam Zheng } 19685820f1daSChunyan Liu fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT); 19695820f1daSChunyan Liu if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false)) { 19705820f1daSChunyan Liu zeroed_grain = true; 1971f66fd6c3SFam Zheng } 19725820f1daSChunyan Liu 19737f2039f6SOthmar Pasteka if (!adapter_type) { 19745820f1daSChunyan Liu adapter_type = g_strdup("ide"); 19757f2039f6SOthmar Pasteka } else if (strcmp(adapter_type, "ide") && 19767f2039f6SOthmar Pasteka strcmp(adapter_type, "buslogic") && 19777f2039f6SOthmar Pasteka strcmp(adapter_type, "lsilogic") && 19787f2039f6SOthmar Pasteka strcmp(adapter_type, "legacyESX")) { 19794823970bSFam Zheng error_setg(errp, "Unknown adapter type: '%s'", adapter_type); 1980af057fe7SFam Zheng ret = -EINVAL; 1981af057fe7SFam Zheng goto exit; 19827f2039f6SOthmar Pasteka } 19837f2039f6SOthmar Pasteka if (strcmp(adapter_type, "ide") != 0) { 19847f2039f6SOthmar Pasteka /* that's the number of heads with which vmware operates when 19857f2039f6SOthmar Pasteka creating, exporting, etc. vmdk files with a non-ide adapter type */ 19867f2039f6SOthmar Pasteka number_heads = 255; 19877f2039f6SOthmar Pasteka } 1988f66fd6c3SFam Zheng if (!fmt) { 1989f66fd6c3SFam Zheng /* Default format to monolithicSparse */ 19905820f1daSChunyan Liu fmt = g_strdup("monolithicSparse"); 1991f66fd6c3SFam Zheng } else if (strcmp(fmt, "monolithicFlat") && 1992f66fd6c3SFam Zheng strcmp(fmt, "monolithicSparse") && 1993f66fd6c3SFam Zheng strcmp(fmt, "twoGbMaxExtentSparse") && 19946c031aacSFam Zheng strcmp(fmt, "twoGbMaxExtentFlat") && 19956c031aacSFam Zheng strcmp(fmt, "streamOptimized")) { 19964823970bSFam Zheng error_setg(errp, "Unknown subformat: '%s'", fmt); 1997af057fe7SFam Zheng ret = -EINVAL; 1998af057fe7SFam Zheng goto exit; 1999f66fd6c3SFam Zheng } 2000f66fd6c3SFam Zheng split = !(strcmp(fmt, "twoGbMaxExtentFlat") && 2001f66fd6c3SFam Zheng strcmp(fmt, "twoGbMaxExtentSparse")); 2002f66fd6c3SFam Zheng flat = !(strcmp(fmt, "monolithicFlat") && 2003f66fd6c3SFam Zheng strcmp(fmt, "twoGbMaxExtentFlat")); 20046c031aacSFam Zheng compress = !strcmp(fmt, "streamOptimized"); 2005f66fd6c3SFam Zheng if (flat) { 20064ab9dab5SFam Zheng desc_extent_line = "RW %" PRId64 " FLAT \"%s\" 0\n"; 2007f66fd6c3SFam Zheng } else { 20084ab9dab5SFam Zheng desc_extent_line = "RW %" PRId64 " SPARSE \"%s\"\n"; 2009f66fd6c3SFam Zheng } 2010f66fd6c3SFam Zheng if (flat && backing_file) { 20114823970bSFam Zheng error_setg(errp, "Flat image can't have backing file"); 2012af057fe7SFam Zheng ret = -ENOTSUP; 2013af057fe7SFam Zheng goto exit; 2014f66fd6c3SFam Zheng } 201552c8d629SFam Zheng if (flat && zeroed_grain) { 201652c8d629SFam Zheng error_setg(errp, "Flat image can't enable zeroed grain"); 2017af057fe7SFam Zheng ret = -ENOTSUP; 2018af057fe7SFam Zheng goto exit; 201952c8d629SFam Zheng } 2020f66fd6c3SFam Zheng if (backing_file) { 2021c4bea169SKevin Wolf BlockBackend *blk; 20221085daf9SMax Reitz char *full_backing = g_new0(char, PATH_MAX); 20231085daf9SMax Reitz bdrv_get_full_backing_filename_from_filename(filename, backing_file, 20241085daf9SMax Reitz full_backing, PATH_MAX, 20251085daf9SMax Reitz &local_err); 20261085daf9SMax Reitz if (local_err) { 20271085daf9SMax Reitz g_free(full_backing); 20281085daf9SMax Reitz error_propagate(errp, local_err); 20291085daf9SMax Reitz ret = -ENOENT; 20301085daf9SMax Reitz goto exit; 20311085daf9SMax Reitz } 2032c4bea169SKevin Wolf 2033efaa7c4eSMax Reitz blk = blk_new_open(full_backing, NULL, NULL, 203472e775c7SKevin Wolf BDRV_O_NO_BACKING, errp); 20351085daf9SMax Reitz g_free(full_backing); 2036c4bea169SKevin Wolf if (blk == NULL) { 2037c4bea169SKevin Wolf ret = -EIO; 2038af057fe7SFam Zheng goto exit; 2039f66fd6c3SFam Zheng } 2040c4bea169SKevin Wolf if (strcmp(blk_bs(blk)->drv->format_name, "vmdk")) { 2041c4bea169SKevin Wolf blk_unref(blk); 2042af057fe7SFam Zheng ret = -EINVAL; 2043af057fe7SFam Zheng goto exit; 2044f66fd6c3SFam Zheng } 2045c4bea169SKevin Wolf parent_cid = vmdk_read_cid(blk_bs(blk), 0); 2046c4bea169SKevin Wolf blk_unref(blk); 2047fe206562SJeff Cody snprintf(parent_desc_line, BUF_SIZE, 20488ed610a1SFam Zheng "parentFileNameHint=\"%s\"", backing_file); 2049f66fd6c3SFam Zheng } 2050f66fd6c3SFam Zheng 2051f66fd6c3SFam Zheng /* Create extents */ 2052f66fd6c3SFam Zheng filesize = total_size; 2053f66fd6c3SFam Zheng while (filesize > 0) { 2054f66fd6c3SFam Zheng int64_t size = filesize; 2055f66fd6c3SFam Zheng 2056f66fd6c3SFam Zheng if (split && size > split_size) { 2057f66fd6c3SFam Zheng size = split_size; 2058f66fd6c3SFam Zheng } 2059f66fd6c3SFam Zheng if (split) { 2060fe206562SJeff Cody snprintf(desc_filename, PATH_MAX, "%s-%c%03d%s", 2061f66fd6c3SFam Zheng prefix, flat ? 'f' : 's', ++idx, postfix); 2062f66fd6c3SFam Zheng } else if (flat) { 2063fe206562SJeff Cody snprintf(desc_filename, PATH_MAX, "%s-flat%s", prefix, postfix); 2064f66fd6c3SFam Zheng } else { 2065fe206562SJeff Cody snprintf(desc_filename, PATH_MAX, "%s%s", prefix, postfix); 2066f66fd6c3SFam Zheng } 2067fe206562SJeff Cody snprintf(ext_filename, PATH_MAX, "%s%s", path, desc_filename); 2068f66fd6c3SFam Zheng 206969e0b6dfSFam Zheng if (vmdk_create_extent(ext_filename, size, 20704ab15590SChunyan Liu flat, compress, zeroed_grain, opts, errp)) { 2071af057fe7SFam Zheng ret = -EINVAL; 2072af057fe7SFam Zheng goto exit; 2073f66fd6c3SFam Zheng } 2074f66fd6c3SFam Zheng filesize -= size; 2075f66fd6c3SFam Zheng 2076f66fd6c3SFam Zheng /* Format description line */ 2077fe206562SJeff Cody snprintf(desc_line, BUF_SIZE, 2078917703c1SFam Zheng desc_extent_line, size / BDRV_SECTOR_SIZE, desc_filename); 2079af057fe7SFam Zheng g_string_append(ext_desc_lines, desc_line); 2080f66fd6c3SFam Zheng } 2081f66fd6c3SFam Zheng /* generate descriptor file */ 2082af057fe7SFam Zheng desc = g_strdup_printf(desc_template, 2083e5dc64b8SFam Zheng g_random_int(), 2084f66fd6c3SFam Zheng parent_cid, 2085f66fd6c3SFam Zheng fmt, 2086f66fd6c3SFam Zheng parent_desc_line, 2087af057fe7SFam Zheng ext_desc_lines->str, 2088f249924eSJanne Karhunen hw_version, 2089917703c1SFam Zheng total_size / 2090917703c1SFam Zheng (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE), 2091af057fe7SFam Zheng number_heads, 20927f2039f6SOthmar Pasteka adapter_type); 2093917703c1SFam Zheng desc_len = strlen(desc); 2094917703c1SFam Zheng /* the descriptor offset = 0x200 */ 2095917703c1SFam Zheng if (!split && !flat) { 2096917703c1SFam Zheng desc_offset = 0x200; 2097f66fd6c3SFam Zheng } else { 2098c282e1fdSChunyan Liu ret = bdrv_create_file(filename, opts, &local_err); 2099917703c1SFam Zheng if (ret < 0) { 2100c13959c7SFam Zheng error_propagate(errp, local_err); 2101af057fe7SFam Zheng goto exit; 2102f66fd6c3SFam Zheng } 2103f66fd6c3SFam Zheng } 2104c4bea169SKevin Wolf 2105efaa7c4eSMax Reitz new_blk = blk_new_open(filename, NULL, NULL, 210672e775c7SKevin Wolf BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err); 2107c4bea169SKevin Wolf if (new_blk == NULL) { 2108c13959c7SFam Zheng error_propagate(errp, local_err); 2109c4bea169SKevin Wolf ret = -EIO; 2110917703c1SFam Zheng goto exit; 21111640366cSKirill A. Shutemov } 2112c4bea169SKevin Wolf 2113c4bea169SKevin Wolf blk_set_allow_write_beyond_eof(new_blk, true); 2114c4bea169SKevin Wolf 21158341f00dSEric Blake ret = blk_pwrite(new_blk, desc_offset, desc, desc_len, 0); 2116917703c1SFam Zheng if (ret < 0) { 2117917703c1SFam Zheng error_setg_errno(errp, -ret, "Could not write description"); 2118917703c1SFam Zheng goto exit; 2119917703c1SFam Zheng } 2120917703c1SFam Zheng /* bdrv_pwrite write padding zeros to align to sector, we don't need that 2121917703c1SFam Zheng * for description file */ 2122917703c1SFam Zheng if (desc_offset == 0) { 2123c4bea169SKevin Wolf ret = blk_truncate(new_blk, desc_len); 2124917703c1SFam Zheng if (ret < 0) { 212539a611a3SJeff Cody error_setg_errno(errp, -ret, "Could not truncate file"); 2126917703c1SFam Zheng } 2127917703c1SFam Zheng } 2128af057fe7SFam Zheng exit: 2129c4bea169SKevin Wolf if (new_blk) { 2130c4bea169SKevin Wolf blk_unref(new_blk); 2131917703c1SFam Zheng } 21325820f1daSChunyan Liu g_free(adapter_type); 21335820f1daSChunyan Liu g_free(backing_file); 2134f249924eSJanne Karhunen g_free(hw_version); 21355820f1daSChunyan Liu g_free(fmt); 2136af057fe7SFam Zheng g_free(desc); 2137fe206562SJeff Cody g_free(path); 2138fe206562SJeff Cody g_free(prefix); 2139fe206562SJeff Cody g_free(postfix); 2140fe206562SJeff Cody g_free(desc_line); 2141fe206562SJeff Cody g_free(ext_filename); 2142fe206562SJeff Cody g_free(desc_filename); 2143fe206562SJeff Cody g_free(parent_desc_line); 2144af057fe7SFam Zheng g_string_free(ext_desc_lines, true); 21451640366cSKirill A. Shutemov return ret; 2146019d6b8fSAnthony Liguori } 2147019d6b8fSAnthony Liguori 2148019d6b8fSAnthony Liguori static void vmdk_close(BlockDriverState *bs) 2149019d6b8fSAnthony Liguori { 21502bc3166cSKevin Wolf BDRVVmdkState *s = bs->opaque; 21512bc3166cSKevin Wolf 2152b3976d3cSFam Zheng vmdk_free_extents(bs); 2153f4c129a3SFam Zheng g_free(s->create_type); 21542bc3166cSKevin Wolf 21552bc3166cSKevin Wolf migrate_del_blocker(s->migration_blocker); 21562bc3166cSKevin Wolf error_free(s->migration_blocker); 2157019d6b8fSAnthony Liguori } 2158019d6b8fSAnthony Liguori 21598b94ff85SPaolo Bonzini static coroutine_fn int vmdk_co_flush(BlockDriverState *bs) 2160019d6b8fSAnthony Liguori { 2161333c574dSFam Zheng BDRVVmdkState *s = bs->opaque; 216229cdb251SPaolo Bonzini int i, err; 216329cdb251SPaolo Bonzini int ret = 0; 2164333c574dSFam Zheng 2165333c574dSFam Zheng for (i = 0; i < s->num_extents; i++) { 216624bc15d1SKevin Wolf err = bdrv_co_flush(s->extents[i].file->bs); 2167333c574dSFam Zheng if (err < 0) { 2168333c574dSFam Zheng ret = err; 2169333c574dSFam Zheng } 2170333c574dSFam Zheng } 2171333c574dSFam Zheng return ret; 2172019d6b8fSAnthony Liguori } 2173019d6b8fSAnthony Liguori 21744a1d5e1fSFam Zheng static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) 21754a1d5e1fSFam Zheng { 21764a1d5e1fSFam Zheng int i; 21774a1d5e1fSFam Zheng int64_t ret = 0; 21784a1d5e1fSFam Zheng int64_t r; 21794a1d5e1fSFam Zheng BDRVVmdkState *s = bs->opaque; 21804a1d5e1fSFam Zheng 21819a4f4c31SKevin Wolf ret = bdrv_get_allocated_file_size(bs->file->bs); 21824a1d5e1fSFam Zheng if (ret < 0) { 21834a1d5e1fSFam Zheng return ret; 21844a1d5e1fSFam Zheng } 21854a1d5e1fSFam Zheng for (i = 0; i < s->num_extents; i++) { 21869a4f4c31SKevin Wolf if (s->extents[i].file == bs->file) { 21874a1d5e1fSFam Zheng continue; 21884a1d5e1fSFam Zheng } 218924bc15d1SKevin Wolf r = bdrv_get_allocated_file_size(s->extents[i].file->bs); 21904a1d5e1fSFam Zheng if (r < 0) { 21914a1d5e1fSFam Zheng return r; 21924a1d5e1fSFam Zheng } 21934a1d5e1fSFam Zheng ret += r; 21944a1d5e1fSFam Zheng } 21954a1d5e1fSFam Zheng return ret; 21964a1d5e1fSFam Zheng } 21970e7e1989SKevin Wolf 2198da7a50f9SFam Zheng static int vmdk_has_zero_init(BlockDriverState *bs) 2199da7a50f9SFam Zheng { 2200da7a50f9SFam Zheng int i; 2201da7a50f9SFam Zheng BDRVVmdkState *s = bs->opaque; 2202da7a50f9SFam Zheng 2203da7a50f9SFam Zheng /* If has a flat extent and its underlying storage doesn't have zero init, 2204da7a50f9SFam Zheng * return 0. */ 2205da7a50f9SFam Zheng for (i = 0; i < s->num_extents; i++) { 2206da7a50f9SFam Zheng if (s->extents[i].flat) { 220724bc15d1SKevin Wolf if (!bdrv_has_zero_init(s->extents[i].file->bs)) { 2208da7a50f9SFam Zheng return 0; 2209da7a50f9SFam Zheng } 2210da7a50f9SFam Zheng } 2211da7a50f9SFam Zheng } 2212da7a50f9SFam Zheng return 1; 2213da7a50f9SFam Zheng } 2214da7a50f9SFam Zheng 2215f4c129a3SFam Zheng static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent) 2216f4c129a3SFam Zheng { 2217f4c129a3SFam Zheng ImageInfo *info = g_new0(ImageInfo, 1); 2218f4c129a3SFam Zheng 2219f4c129a3SFam Zheng *info = (ImageInfo){ 222024bc15d1SKevin Wolf .filename = g_strdup(extent->file->bs->filename), 2221f4c129a3SFam Zheng .format = g_strdup(extent->type), 2222f4c129a3SFam Zheng .virtual_size = extent->sectors * BDRV_SECTOR_SIZE, 2223f4c129a3SFam Zheng .compressed = extent->compressed, 2224f4c129a3SFam Zheng .has_compressed = extent->compressed, 2225f4c129a3SFam Zheng .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE, 2226f4c129a3SFam Zheng .has_cluster_size = !extent->flat, 2227f4c129a3SFam Zheng }; 2228f4c129a3SFam Zheng 2229f4c129a3SFam Zheng return info; 2230f4c129a3SFam Zheng } 2231f4c129a3SFam Zheng 2232f43aa8e1SPeter Lieven static int vmdk_check(BlockDriverState *bs, BdrvCheckResult *result, 2233f43aa8e1SPeter Lieven BdrvCheckMode fix) 2234f43aa8e1SPeter Lieven { 2235f43aa8e1SPeter Lieven BDRVVmdkState *s = bs->opaque; 2236f43aa8e1SPeter Lieven VmdkExtent *extent = NULL; 2237f43aa8e1SPeter Lieven int64_t sector_num = 0; 223857322b78SMarkus Armbruster int64_t total_sectors = bdrv_nb_sectors(bs); 2239f43aa8e1SPeter Lieven int ret; 2240f43aa8e1SPeter Lieven uint64_t cluster_offset; 2241f43aa8e1SPeter Lieven 2242f43aa8e1SPeter Lieven if (fix) { 2243f43aa8e1SPeter Lieven return -ENOTSUP; 2244f43aa8e1SPeter Lieven } 2245f43aa8e1SPeter Lieven 2246f43aa8e1SPeter Lieven for (;;) { 2247f43aa8e1SPeter Lieven if (sector_num >= total_sectors) { 2248f43aa8e1SPeter Lieven return 0; 2249f43aa8e1SPeter Lieven } 2250f43aa8e1SPeter Lieven extent = find_extent(s, sector_num, extent); 2251f43aa8e1SPeter Lieven if (!extent) { 2252f43aa8e1SPeter Lieven fprintf(stderr, 2253f43aa8e1SPeter Lieven "ERROR: could not find extent for sector %" PRId64 "\n", 2254f43aa8e1SPeter Lieven sector_num); 2255f43aa8e1SPeter Lieven break; 2256f43aa8e1SPeter Lieven } 2257f43aa8e1SPeter Lieven ret = get_cluster_offset(bs, extent, NULL, 2258f43aa8e1SPeter Lieven sector_num << BDRV_SECTOR_BITS, 2259c6ac36e1SFam Zheng false, &cluster_offset, 0, 0); 2260f43aa8e1SPeter Lieven if (ret == VMDK_ERROR) { 2261f43aa8e1SPeter Lieven fprintf(stderr, 2262f43aa8e1SPeter Lieven "ERROR: could not get cluster_offset for sector %" 2263f43aa8e1SPeter Lieven PRId64 "\n", sector_num); 2264f43aa8e1SPeter Lieven break; 2265f43aa8e1SPeter Lieven } 226624bc15d1SKevin Wolf if (ret == VMDK_OK && 226724bc15d1SKevin Wolf cluster_offset >= bdrv_getlength(extent->file->bs)) 226824bc15d1SKevin Wolf { 2269f43aa8e1SPeter Lieven fprintf(stderr, 2270f43aa8e1SPeter Lieven "ERROR: cluster offset for sector %" 2271f43aa8e1SPeter Lieven PRId64 " points after EOF\n", sector_num); 2272f43aa8e1SPeter Lieven break; 2273f43aa8e1SPeter Lieven } 2274f43aa8e1SPeter Lieven sector_num += extent->cluster_sectors; 2275f43aa8e1SPeter Lieven } 2276f43aa8e1SPeter Lieven 2277f43aa8e1SPeter Lieven result->corruptions++; 2278f43aa8e1SPeter Lieven return 0; 2279f43aa8e1SPeter Lieven } 2280f43aa8e1SPeter Lieven 2281f4c129a3SFam Zheng static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs) 2282f4c129a3SFam Zheng { 2283f4c129a3SFam Zheng int i; 2284f4c129a3SFam Zheng BDRVVmdkState *s = bs->opaque; 2285f4c129a3SFam Zheng ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); 2286f4c129a3SFam Zheng ImageInfoList **next; 2287f4c129a3SFam Zheng 2288f4c129a3SFam Zheng *spec_info = (ImageInfoSpecific){ 22896a8f9661SEric Blake .type = IMAGE_INFO_SPECIFIC_KIND_VMDK, 229032bafa8fSEric Blake .u = { 229132bafa8fSEric Blake .vmdk.data = g_new0(ImageInfoSpecificVmdk, 1), 2292f4c129a3SFam Zheng }, 2293f4c129a3SFam Zheng }; 2294f4c129a3SFam Zheng 229532bafa8fSEric Blake *spec_info->u.vmdk.data = (ImageInfoSpecificVmdk) { 2296f4c129a3SFam Zheng .create_type = g_strdup(s->create_type), 2297f4c129a3SFam Zheng .cid = s->cid, 2298f4c129a3SFam Zheng .parent_cid = s->parent_cid, 2299f4c129a3SFam Zheng }; 2300f4c129a3SFam Zheng 230132bafa8fSEric Blake next = &spec_info->u.vmdk.data->extents; 2302f4c129a3SFam Zheng for (i = 0; i < s->num_extents; i++) { 2303f4c129a3SFam Zheng *next = g_new0(ImageInfoList, 1); 2304f4c129a3SFam Zheng (*next)->value = vmdk_get_extent_info(&s->extents[i]); 2305f4c129a3SFam Zheng (*next)->next = NULL; 2306f4c129a3SFam Zheng next = &(*next)->next; 2307f4c129a3SFam Zheng } 2308f4c129a3SFam Zheng 2309f4c129a3SFam Zheng return spec_info; 2310f4c129a3SFam Zheng } 2311f4c129a3SFam Zheng 23125f583307SFam Zheng static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b) 23135f583307SFam Zheng { 23145f583307SFam Zheng return a->flat == b->flat && 23155f583307SFam Zheng a->compressed == b->compressed && 23165f583307SFam Zheng (a->flat || a->cluster_sectors == b->cluster_sectors); 23175f583307SFam Zheng } 23185f583307SFam Zheng 231974fe188cSFam Zheng static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) 232074fe188cSFam Zheng { 232174fe188cSFam Zheng int i; 232274fe188cSFam Zheng BDRVVmdkState *s = bs->opaque; 232374fe188cSFam Zheng assert(s->num_extents); 23245f583307SFam Zheng 23255f583307SFam Zheng /* See if we have multiple extents but they have different cases */ 23265f583307SFam Zheng for (i = 1; i < s->num_extents; i++) { 23275f583307SFam Zheng if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) { 23285f583307SFam Zheng return -ENOTSUP; 23295f583307SFam Zheng } 23305f583307SFam Zheng } 233174fe188cSFam Zheng bdi->needs_compressed_writes = s->extents[0].compressed; 233274fe188cSFam Zheng if (!s->extents[0].flat) { 233374fe188cSFam Zheng bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS; 233474fe188cSFam Zheng } 233574fe188cSFam Zheng return 0; 233674fe188cSFam Zheng } 233774fe188cSFam Zheng 23385820f1daSChunyan Liu static QemuOptsList vmdk_create_opts = { 23395820f1daSChunyan Liu .name = "vmdk-create-opts", 23405820f1daSChunyan Liu .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head), 23415820f1daSChunyan Liu .desc = { 2342db08adf5SKevin Wolf { 2343db08adf5SKevin Wolf .name = BLOCK_OPT_SIZE, 23445820f1daSChunyan Liu .type = QEMU_OPT_SIZE, 2345db08adf5SKevin Wolf .help = "Virtual disk size" 2346db08adf5SKevin Wolf }, 2347db08adf5SKevin Wolf { 23487f2039f6SOthmar Pasteka .name = BLOCK_OPT_ADAPTER_TYPE, 23495820f1daSChunyan Liu .type = QEMU_OPT_STRING, 23507f2039f6SOthmar Pasteka .help = "Virtual adapter type, can be one of " 23517f2039f6SOthmar Pasteka "ide (default), lsilogic, buslogic or legacyESX" 23527f2039f6SOthmar Pasteka }, 23537f2039f6SOthmar Pasteka { 2354db08adf5SKevin Wolf .name = BLOCK_OPT_BACKING_FILE, 23555820f1daSChunyan Liu .type = QEMU_OPT_STRING, 2356db08adf5SKevin Wolf .help = "File name of a base image" 2357db08adf5SKevin Wolf }, 2358db08adf5SKevin Wolf { 2359db08adf5SKevin Wolf .name = BLOCK_OPT_COMPAT6, 23605820f1daSChunyan Liu .type = QEMU_OPT_BOOL, 23615820f1daSChunyan Liu .help = "VMDK version 6 image", 23625820f1daSChunyan Liu .def_value_str = "off" 2363db08adf5SKevin Wolf }, 2364f66fd6c3SFam Zheng { 2365f249924eSJanne Karhunen .name = BLOCK_OPT_HWVERSION, 2366f249924eSJanne Karhunen .type = QEMU_OPT_STRING, 2367f249924eSJanne Karhunen .help = "VMDK hardware version", 2368f249924eSJanne Karhunen .def_value_str = "undefined" 2369f249924eSJanne Karhunen }, 2370f249924eSJanne Karhunen { 2371f66fd6c3SFam Zheng .name = BLOCK_OPT_SUBFMT, 23725820f1daSChunyan Liu .type = QEMU_OPT_STRING, 2373f66fd6c3SFam Zheng .help = 2374f66fd6c3SFam Zheng "VMDK flat extent format, can be one of " 23756c031aacSFam Zheng "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " 2376f66fd6c3SFam Zheng }, 237769e0b6dfSFam Zheng { 237869e0b6dfSFam Zheng .name = BLOCK_OPT_ZEROED_GRAIN, 23795820f1daSChunyan Liu .type = QEMU_OPT_BOOL, 23805820f1daSChunyan Liu .help = "Enable efficient zero writes " 23815820f1daSChunyan Liu "using the zeroed-grain GTE feature" 238269e0b6dfSFam Zheng }, 23835820f1daSChunyan Liu { /* end of list */ } 23845820f1daSChunyan Liu } 23850e7e1989SKevin Wolf }; 23860e7e1989SKevin Wolf 2387019d6b8fSAnthony Liguori static BlockDriver bdrv_vmdk = { 2388019d6b8fSAnthony Liguori .format_name = "vmdk", 2389019d6b8fSAnthony Liguori .instance_size = sizeof(BDRVVmdkState), 2390019d6b8fSAnthony Liguori .bdrv_probe = vmdk_probe, 23916511ef77SKevin Wolf .bdrv_open = vmdk_open, 2392f43aa8e1SPeter Lieven .bdrv_check = vmdk_check, 23933897575fSJeff Cody .bdrv_reopen_prepare = vmdk_reopen_prepare, 2394f10cc243SKevin Wolf .bdrv_co_preadv = vmdk_co_preadv, 239537b1d7d8SKevin Wolf .bdrv_co_pwritev = vmdk_co_pwritev, 2396ba0ad89eSFam Zheng .bdrv_write_compressed = vmdk_write_compressed, 2397a620f2aeSEric Blake .bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes, 2398019d6b8fSAnthony Liguori .bdrv_close = vmdk_close, 2399c282e1fdSChunyan Liu .bdrv_create = vmdk_create, 2400c68b89acSKevin Wolf .bdrv_co_flush_to_disk = vmdk_co_flush, 2401b6b8a333SPaolo Bonzini .bdrv_co_get_block_status = vmdk_co_get_block_status, 24024a1d5e1fSFam Zheng .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, 2403da7a50f9SFam Zheng .bdrv_has_zero_init = vmdk_has_zero_init, 2404f4c129a3SFam Zheng .bdrv_get_specific_info = vmdk_get_specific_info, 2405d34682cdSKevin Wolf .bdrv_refresh_limits = vmdk_refresh_limits, 240674fe188cSFam Zheng .bdrv_get_info = vmdk_get_info, 24070e7e1989SKevin Wolf 24088ee79e70SKevin Wolf .supports_backing = true, 24095820f1daSChunyan Liu .create_opts = &vmdk_create_opts, 2410019d6b8fSAnthony Liguori }; 2411019d6b8fSAnthony Liguori 2412019d6b8fSAnthony Liguori static void bdrv_vmdk_init(void) 2413019d6b8fSAnthony Liguori { 2414019d6b8fSAnthony Liguori bdrv_register(&bdrv_vmdk); 2415019d6b8fSAnthony Liguori } 2416019d6b8fSAnthony Liguori 2417019d6b8fSAnthony Liguori block_init(bdrv_vmdk_init); 2418