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e0f100f57c
Signed-off-by: Fam Zheng <famz@redhat.com> Message-id: 1453780743-16806-13-git-send-email-famz@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2331 lines
71 KiB
C
2331 lines
71 KiB
C
/*
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* Block driver for the VMDK format
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*
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* Copyright (c) 2004 Fabrice Bellard
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* Copyright (c) 2005 Filip Navara
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "block/block_int.h"
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#include "qapi/qmp/qerror.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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#include "migration/migration.h"
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#include <zlib.h>
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#include <glib.h>
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#define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D')
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#define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V')
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#define VMDK4_COMPRESSION_DEFLATE 1
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#define VMDK4_FLAG_NL_DETECT (1 << 0)
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#define VMDK4_FLAG_RGD (1 << 1)
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/* Zeroed-grain enable bit */
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#define VMDK4_FLAG_ZERO_GRAIN (1 << 2)
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#define VMDK4_FLAG_COMPRESS (1 << 16)
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#define VMDK4_FLAG_MARKER (1 << 17)
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#define VMDK4_GD_AT_END 0xffffffffffffffffULL
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#define VMDK_GTE_ZEROED 0x1
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/* VMDK internal error codes */
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#define VMDK_OK 0
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#define VMDK_ERROR (-1)
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/* Cluster not allocated */
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#define VMDK_UNALLOC (-2)
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#define VMDK_ZEROED (-3)
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#define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain"
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typedef struct {
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uint32_t version;
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uint32_t flags;
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uint32_t disk_sectors;
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uint32_t granularity;
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uint32_t l1dir_offset;
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uint32_t l1dir_size;
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uint32_t file_sectors;
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uint32_t cylinders;
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uint32_t heads;
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uint32_t sectors_per_track;
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} QEMU_PACKED VMDK3Header;
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typedef struct {
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uint32_t version;
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uint32_t flags;
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uint64_t capacity;
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uint64_t granularity;
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uint64_t desc_offset;
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uint64_t desc_size;
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/* Number of GrainTableEntries per GrainTable */
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uint32_t num_gtes_per_gt;
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uint64_t rgd_offset;
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uint64_t gd_offset;
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uint64_t grain_offset;
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char filler[1];
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char check_bytes[4];
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uint16_t compressAlgorithm;
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} QEMU_PACKED VMDK4Header;
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#define L2_CACHE_SIZE 16
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typedef struct VmdkExtent {
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BdrvChild *file;
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bool flat;
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bool compressed;
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bool has_marker;
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bool has_zero_grain;
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int version;
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int64_t sectors;
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int64_t end_sector;
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int64_t flat_start_offset;
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int64_t l1_table_offset;
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int64_t l1_backup_table_offset;
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uint32_t *l1_table;
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uint32_t *l1_backup_table;
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unsigned int l1_size;
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uint32_t l1_entry_sectors;
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unsigned int l2_size;
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uint32_t *l2_cache;
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uint32_t l2_cache_offsets[L2_CACHE_SIZE];
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uint32_t l2_cache_counts[L2_CACHE_SIZE];
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int64_t cluster_sectors;
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int64_t next_cluster_sector;
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char *type;
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} VmdkExtent;
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typedef struct BDRVVmdkState {
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CoMutex lock;
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uint64_t desc_offset;
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bool cid_updated;
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bool cid_checked;
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uint32_t cid;
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uint32_t parent_cid;
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int num_extents;
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/* Extent array with num_extents entries, ascend ordered by address */
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VmdkExtent *extents;
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Error *migration_blocker;
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char *create_type;
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} BDRVVmdkState;
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typedef struct VmdkMetaData {
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unsigned int l1_index;
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unsigned int l2_index;
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unsigned int l2_offset;
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int valid;
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uint32_t *l2_cache_entry;
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} VmdkMetaData;
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typedef struct VmdkGrainMarker {
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uint64_t lba;
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uint32_t size;
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uint8_t data[0];
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} QEMU_PACKED VmdkGrainMarker;
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enum {
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MARKER_END_OF_STREAM = 0,
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MARKER_GRAIN_TABLE = 1,
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MARKER_GRAIN_DIRECTORY = 2,
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MARKER_FOOTER = 3,
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};
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static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename)
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{
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uint32_t magic;
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if (buf_size < 4) {
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return 0;
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}
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magic = be32_to_cpu(*(uint32_t *)buf);
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if (magic == VMDK3_MAGIC ||
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magic == VMDK4_MAGIC) {
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return 100;
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} else {
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const char *p = (const char *)buf;
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const char *end = p + buf_size;
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while (p < end) {
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if (*p == '#') {
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/* skip comment line */
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while (p < end && *p != '\n') {
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p++;
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}
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p++;
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continue;
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}
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if (*p == ' ') {
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while (p < end && *p == ' ') {
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p++;
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}
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/* skip '\r' if windows line endings used. */
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if (p < end && *p == '\r') {
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p++;
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}
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/* only accept blank lines before 'version=' line */
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if (p == end || *p != '\n') {
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return 0;
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}
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p++;
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continue;
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}
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if (end - p >= strlen("version=X\n")) {
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if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 ||
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strncmp("version=2\n", p, strlen("version=2\n")) == 0) {
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return 100;
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}
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}
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if (end - p >= strlen("version=X\r\n")) {
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if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 ||
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strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) {
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return 100;
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}
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}
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return 0;
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}
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return 0;
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}
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}
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#define SECTOR_SIZE 512
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#define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */
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#define BUF_SIZE 4096
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#define HEADER_SIZE 512 /* first sector of 512 bytes */
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static void vmdk_free_extents(BlockDriverState *bs)
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{
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int i;
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BDRVVmdkState *s = bs->opaque;
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VmdkExtent *e;
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for (i = 0; i < s->num_extents; i++) {
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e = &s->extents[i];
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g_free(e->l1_table);
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g_free(e->l2_cache);
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g_free(e->l1_backup_table);
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g_free(e->type);
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if (e->file != bs->file) {
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bdrv_unref_child(bs, e->file);
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}
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}
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g_free(s->extents);
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}
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static void vmdk_free_last_extent(BlockDriverState *bs)
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{
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BDRVVmdkState *s = bs->opaque;
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if (s->num_extents == 0) {
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return;
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}
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s->num_extents--;
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s->extents = g_renew(VmdkExtent, s->extents, s->num_extents);
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}
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static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent)
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{
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char desc[DESC_SIZE];
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uint32_t cid = 0xffffffff;
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const char *p_name, *cid_str;
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size_t cid_str_size;
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BDRVVmdkState *s = bs->opaque;
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int ret;
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ret = bdrv_pread(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
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if (ret < 0) {
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return 0;
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}
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if (parent) {
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cid_str = "parentCID";
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cid_str_size = sizeof("parentCID");
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} else {
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cid_str = "CID";
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cid_str_size = sizeof("CID");
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}
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desc[DESC_SIZE - 1] = '\0';
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p_name = strstr(desc, cid_str);
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if (p_name != NULL) {
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p_name += cid_str_size;
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sscanf(p_name, "%" SCNx32, &cid);
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}
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return cid;
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}
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static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
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{
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char desc[DESC_SIZE], tmp_desc[DESC_SIZE];
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char *p_name, *tmp_str;
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BDRVVmdkState *s = bs->opaque;
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int ret;
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ret = bdrv_pread(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
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if (ret < 0) {
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return ret;
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}
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desc[DESC_SIZE - 1] = '\0';
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tmp_str = strstr(desc, "parentCID");
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if (tmp_str == NULL) {
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return -EINVAL;
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}
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pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str);
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p_name = strstr(desc, "CID");
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if (p_name != NULL) {
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p_name += sizeof("CID");
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snprintf(p_name, sizeof(desc) - (p_name - desc), "%" PRIx32 "\n", cid);
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pstrcat(desc, sizeof(desc), tmp_desc);
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}
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ret = bdrv_pwrite_sync(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
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if (ret < 0) {
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return ret;
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}
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return 0;
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}
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static int vmdk_is_cid_valid(BlockDriverState *bs)
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{
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BDRVVmdkState *s = bs->opaque;
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uint32_t cur_pcid;
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if (!s->cid_checked && bs->backing) {
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BlockDriverState *p_bs = bs->backing->bs;
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cur_pcid = vmdk_read_cid(p_bs, 0);
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if (s->parent_cid != cur_pcid) {
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/* CID not valid */
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return 0;
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}
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}
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s->cid_checked = true;
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/* CID valid */
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return 1;
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}
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/* We have nothing to do for VMDK reopen, stubs just return success */
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static int vmdk_reopen_prepare(BDRVReopenState *state,
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BlockReopenQueue *queue, Error **errp)
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{
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assert(state != NULL);
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assert(state->bs != NULL);
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return 0;
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}
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static int vmdk_parent_open(BlockDriverState *bs)
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{
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char *p_name;
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char desc[DESC_SIZE + 1];
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BDRVVmdkState *s = bs->opaque;
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int ret;
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desc[DESC_SIZE] = '\0';
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ret = bdrv_pread(bs->file->bs, s->desc_offset, desc, DESC_SIZE);
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if (ret < 0) {
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return ret;
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}
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p_name = strstr(desc, "parentFileNameHint");
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if (p_name != NULL) {
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char *end_name;
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p_name += sizeof("parentFileNameHint") + 1;
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end_name = strchr(p_name, '\"');
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if (end_name == NULL) {
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return -EINVAL;
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}
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if ((end_name - p_name) > sizeof(bs->backing_file) - 1) {
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return -EINVAL;
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}
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pstrcpy(bs->backing_file, end_name - p_name + 1, p_name);
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}
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return 0;
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}
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/* Create and append extent to the extent array. Return the added VmdkExtent
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* address. return NULL if allocation failed. */
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static int vmdk_add_extent(BlockDriverState *bs,
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BdrvChild *file, bool flat, int64_t sectors,
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int64_t l1_offset, int64_t l1_backup_offset,
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uint32_t l1_size,
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int l2_size, uint64_t cluster_sectors,
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VmdkExtent **new_extent,
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Error **errp)
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{
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VmdkExtent *extent;
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BDRVVmdkState *s = bs->opaque;
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int64_t nb_sectors;
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if (cluster_sectors > 0x200000) {
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/* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */
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error_setg(errp, "Invalid granularity, image may be corrupt");
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return -EFBIG;
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}
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if (l1_size > 512 * 1024 * 1024) {
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/* Although with big capacity and small l1_entry_sectors, we can get a
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* big l1_size, we don't want unbounded value to allocate the table.
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* Limit it to 512M, which is 16PB for default cluster and L2 table
|
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* size */
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error_setg(errp, "L1 size too big");
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return -EFBIG;
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}
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|
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nb_sectors = bdrv_nb_sectors(file->bs);
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if (nb_sectors < 0) {
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return nb_sectors;
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}
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|
|
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s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1);
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extent = &s->extents[s->num_extents];
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s->num_extents++;
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memset(extent, 0, sizeof(VmdkExtent));
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extent->file = file;
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extent->flat = flat;
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extent->sectors = sectors;
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extent->l1_table_offset = l1_offset;
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extent->l1_backup_table_offset = l1_backup_offset;
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extent->l1_size = l1_size;
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extent->l1_entry_sectors = l2_size * cluster_sectors;
|
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extent->l2_size = l2_size;
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extent->cluster_sectors = flat ? sectors : cluster_sectors;
|
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extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors);
|
|
|
|
if (s->num_extents > 1) {
|
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extent->end_sector = (*(extent - 1)).end_sector + extent->sectors;
|
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} else {
|
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extent->end_sector = extent->sectors;
|
|
}
|
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bs->total_sectors = extent->end_sector;
|
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if (new_extent) {
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*new_extent = extent;
|
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}
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return 0;
|
|
}
|
|
|
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static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent,
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Error **errp)
|
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{
|
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int ret;
|
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size_t l1_size;
|
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int i;
|
|
|
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/* read the L1 table */
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l1_size = extent->l1_size * sizeof(uint32_t);
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extent->l1_table = g_try_malloc(l1_size);
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if (l1_size && extent->l1_table == NULL) {
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return -ENOMEM;
|
|
}
|
|
|
|
ret = bdrv_pread(extent->file->bs,
|
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extent->l1_table_offset,
|
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extent->l1_table,
|
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l1_size);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret,
|
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"Could not read l1 table from extent '%s'",
|
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extent->file->bs->filename);
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goto fail_l1;
|
|
}
|
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for (i = 0; i < extent->l1_size; i++) {
|
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le32_to_cpus(&extent->l1_table[i]);
|
|
}
|
|
|
|
if (extent->l1_backup_table_offset) {
|
|
extent->l1_backup_table = g_try_malloc(l1_size);
|
|
if (l1_size && extent->l1_backup_table == NULL) {
|
|
ret = -ENOMEM;
|
|
goto fail_l1;
|
|
}
|
|
ret = bdrv_pread(extent->file->bs,
|
|
extent->l1_backup_table_offset,
|
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extent->l1_backup_table,
|
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l1_size);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret,
|
|
"Could not read l1 backup table from extent '%s'",
|
|
extent->file->bs->filename);
|
|
goto fail_l1b;
|
|
}
|
|
for (i = 0; i < extent->l1_size; i++) {
|
|
le32_to_cpus(&extent->l1_backup_table[i]);
|
|
}
|
|
}
|
|
|
|
extent->l2_cache =
|
|
g_new(uint32_t, extent->l2_size * L2_CACHE_SIZE);
|
|
return 0;
|
|
fail_l1b:
|
|
g_free(extent->l1_backup_table);
|
|
fail_l1:
|
|
g_free(extent->l1_table);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_open_vmfs_sparse(BlockDriverState *bs,
|
|
BdrvChild *file,
|
|
int flags, Error **errp)
|
|
{
|
|
int ret;
|
|
uint32_t magic;
|
|
VMDK3Header header;
|
|
VmdkExtent *extent;
|
|
|
|
ret = bdrv_pread(file->bs, sizeof(magic), &header, sizeof(header));
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret,
|
|
"Could not read header from file '%s'",
|
|
file->bs->filename);
|
|
return ret;
|
|
}
|
|
ret = vmdk_add_extent(bs, file, false,
|
|
le32_to_cpu(header.disk_sectors),
|
|
(int64_t)le32_to_cpu(header.l1dir_offset) << 9,
|
|
0,
|
|
le32_to_cpu(header.l1dir_size),
|
|
4096,
|
|
le32_to_cpu(header.granularity),
|
|
&extent,
|
|
errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
ret = vmdk_init_tables(bs, extent, errp);
|
|
if (ret) {
|
|
/* free extent allocated by vmdk_add_extent */
|
|
vmdk_free_last_extent(bs);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
|
|
QDict *options, Error **errp);
|
|
|
|
static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset,
|
|
Error **errp)
|
|
{
|
|
int64_t size;
|
|
char *buf;
|
|
int ret;
|
|
|
|
size = bdrv_getlength(file);
|
|
if (size < 0) {
|
|
error_setg_errno(errp, -size, "Could not access file");
|
|
return NULL;
|
|
}
|
|
|
|
if (size < 4) {
|
|
/* Both descriptor file and sparse image must be much larger than 4
|
|
* bytes, also callers of vmdk_read_desc want to compare the first 4
|
|
* bytes with VMDK4_MAGIC, let's error out if less is read. */
|
|
error_setg(errp, "File is too small, not a valid image");
|
|
return NULL;
|
|
}
|
|
|
|
size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */
|
|
buf = g_malloc(size + 1);
|
|
|
|
ret = bdrv_pread(file, desc_offset, buf, size);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Could not read from file");
|
|
g_free(buf);
|
|
return NULL;
|
|
}
|
|
buf[ret] = 0;
|
|
|
|
return buf;
|
|
}
|
|
|
|
static int vmdk_open_vmdk4(BlockDriverState *bs,
|
|
BdrvChild *file,
|
|
int flags, QDict *options, Error **errp)
|
|
{
|
|
int ret;
|
|
uint32_t magic;
|
|
uint32_t l1_size, l1_entry_sectors;
|
|
VMDK4Header header;
|
|
VmdkExtent *extent;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int64_t l1_backup_offset = 0;
|
|
bool compressed;
|
|
|
|
ret = bdrv_pread(file->bs, sizeof(magic), &header, sizeof(header));
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret,
|
|
"Could not read header from file '%s'",
|
|
file->bs->filename);
|
|
return -EINVAL;
|
|
}
|
|
if (header.capacity == 0) {
|
|
uint64_t desc_offset = le64_to_cpu(header.desc_offset);
|
|
if (desc_offset) {
|
|
char *buf = vmdk_read_desc(file->bs, desc_offset << 9, errp);
|
|
if (!buf) {
|
|
return -EINVAL;
|
|
}
|
|
ret = vmdk_open_desc_file(bs, flags, buf, options, errp);
|
|
g_free(buf);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (!s->create_type) {
|
|
s->create_type = g_strdup("monolithicSparse");
|
|
}
|
|
|
|
if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) {
|
|
/*
|
|
* The footer takes precedence over the header, so read it in. The
|
|
* footer starts at offset -1024 from the end: One sector for the
|
|
* footer, and another one for the end-of-stream marker.
|
|
*/
|
|
struct {
|
|
struct {
|
|
uint64_t val;
|
|
uint32_t size;
|
|
uint32_t type;
|
|
uint8_t pad[512 - 16];
|
|
} QEMU_PACKED footer_marker;
|
|
|
|
uint32_t magic;
|
|
VMDK4Header header;
|
|
uint8_t pad[512 - 4 - sizeof(VMDK4Header)];
|
|
|
|
struct {
|
|
uint64_t val;
|
|
uint32_t size;
|
|
uint32_t type;
|
|
uint8_t pad[512 - 16];
|
|
} QEMU_PACKED eos_marker;
|
|
} QEMU_PACKED footer;
|
|
|
|
ret = bdrv_pread(file->bs,
|
|
bs->file->bs->total_sectors * 512 - 1536,
|
|
&footer, sizeof(footer));
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Failed to read footer");
|
|
return ret;
|
|
}
|
|
|
|
/* Some sanity checks for the footer */
|
|
if (be32_to_cpu(footer.magic) != VMDK4_MAGIC ||
|
|
le32_to_cpu(footer.footer_marker.size) != 0 ||
|
|
le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER ||
|
|
le64_to_cpu(footer.eos_marker.val) != 0 ||
|
|
le32_to_cpu(footer.eos_marker.size) != 0 ||
|
|
le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM)
|
|
{
|
|
error_setg(errp, "Invalid footer");
|
|
return -EINVAL;
|
|
}
|
|
|
|
header = footer.header;
|
|
}
|
|
|
|
compressed =
|
|
le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
|
|
if (le32_to_cpu(header.version) > 3) {
|
|
char buf[64];
|
|
snprintf(buf, sizeof(buf), "VMDK version %" PRId32,
|
|
le32_to_cpu(header.version));
|
|
error_setg(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
|
|
bdrv_get_device_or_node_name(bs), "vmdk", buf);
|
|
return -ENOTSUP;
|
|
} else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) &&
|
|
!compressed) {
|
|
/* VMware KB 2064959 explains that version 3 added support for
|
|
* persistent changed block tracking (CBT), and backup software can
|
|
* read it as version=1 if it doesn't care about the changed area
|
|
* information. So we are safe to enable read only. */
|
|
error_setg(errp, "VMDK version 3 must be read only");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (le32_to_cpu(header.num_gtes_per_gt) > 512) {
|
|
error_setg(errp, "L2 table size too big");
|
|
return -EINVAL;
|
|
}
|
|
|
|
l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt)
|
|
* le64_to_cpu(header.granularity);
|
|
if (l1_entry_sectors == 0) {
|
|
error_setg(errp, "L1 entry size is invalid");
|
|
return -EINVAL;
|
|
}
|
|
l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1)
|
|
/ l1_entry_sectors;
|
|
if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) {
|
|
l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9;
|
|
}
|
|
if (bdrv_nb_sectors(file->bs) < le64_to_cpu(header.grain_offset)) {
|
|
error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes",
|
|
(int64_t)(le64_to_cpu(header.grain_offset)
|
|
* BDRV_SECTOR_SIZE));
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = vmdk_add_extent(bs, file, false,
|
|
le64_to_cpu(header.capacity),
|
|
le64_to_cpu(header.gd_offset) << 9,
|
|
l1_backup_offset,
|
|
l1_size,
|
|
le32_to_cpu(header.num_gtes_per_gt),
|
|
le64_to_cpu(header.granularity),
|
|
&extent,
|
|
errp);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
extent->compressed =
|
|
le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE;
|
|
if (extent->compressed) {
|
|
g_free(s->create_type);
|
|
s->create_type = g_strdup("streamOptimized");
|
|
}
|
|
extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER;
|
|
extent->version = le32_to_cpu(header.version);
|
|
extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN;
|
|
ret = vmdk_init_tables(bs, extent, errp);
|
|
if (ret) {
|
|
/* free extent allocated by vmdk_add_extent */
|
|
vmdk_free_last_extent(bs);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* find an option value out of descriptor file */
|
|
static int vmdk_parse_description(const char *desc, const char *opt_name,
|
|
char *buf, int buf_size)
|
|
{
|
|
char *opt_pos, *opt_end;
|
|
const char *end = desc + strlen(desc);
|
|
|
|
opt_pos = strstr(desc, opt_name);
|
|
if (!opt_pos) {
|
|
return VMDK_ERROR;
|
|
}
|
|
/* Skip "=\"" following opt_name */
|
|
opt_pos += strlen(opt_name) + 2;
|
|
if (opt_pos >= end) {
|
|
return VMDK_ERROR;
|
|
}
|
|
opt_end = opt_pos;
|
|
while (opt_end < end && *opt_end != '"') {
|
|
opt_end++;
|
|
}
|
|
if (opt_end == end || buf_size < opt_end - opt_pos + 1) {
|
|
return VMDK_ERROR;
|
|
}
|
|
pstrcpy(buf, opt_end - opt_pos + 1, opt_pos);
|
|
return VMDK_OK;
|
|
}
|
|
|
|
/* Open an extent file and append to bs array */
|
|
static int vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags,
|
|
char *buf, QDict *options, Error **errp)
|
|
{
|
|
uint32_t magic;
|
|
|
|
magic = ldl_be_p(buf);
|
|
switch (magic) {
|
|
case VMDK3_MAGIC:
|
|
return vmdk_open_vmfs_sparse(bs, file, flags, errp);
|
|
break;
|
|
case VMDK4_MAGIC:
|
|
return vmdk_open_vmdk4(bs, file, flags, options, errp);
|
|
break;
|
|
default:
|
|
error_setg(errp, "Image not in VMDK format");
|
|
return -EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static const char *next_line(const char *s)
|
|
{
|
|
while (*s) {
|
|
if (*s == '\n') {
|
|
return s + 1;
|
|
}
|
|
s++;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
|
|
const char *desc_file_path, QDict *options,
|
|
Error **errp)
|
|
{
|
|
int ret;
|
|
int matches;
|
|
char access[11];
|
|
char type[11];
|
|
char fname[512];
|
|
const char *p, *np;
|
|
int64_t sectors = 0;
|
|
int64_t flat_offset;
|
|
char *extent_path;
|
|
BdrvChild *extent_file;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
VmdkExtent *extent;
|
|
char extent_opt_prefix[32];
|
|
Error *local_err = NULL;
|
|
|
|
for (p = desc; *p; p = next_line(p)) {
|
|
/* parse extent line in one of below formats:
|
|
*
|
|
* RW [size in sectors] FLAT "file-name.vmdk" OFFSET
|
|
* RW [size in sectors] SPARSE "file-name.vmdk"
|
|
* RW [size in sectors] VMFS "file-name.vmdk"
|
|
* RW [size in sectors] VMFSSPARSE "file-name.vmdk"
|
|
*/
|
|
flat_offset = -1;
|
|
matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64,
|
|
access, §ors, type, fname, &flat_offset);
|
|
if (matches < 4 || strcmp(access, "RW")) {
|
|
continue;
|
|
} else if (!strcmp(type, "FLAT")) {
|
|
if (matches != 5 || flat_offset < 0) {
|
|
goto invalid;
|
|
}
|
|
} else if (!strcmp(type, "VMFS")) {
|
|
if (matches == 4) {
|
|
flat_offset = 0;
|
|
} else {
|
|
goto invalid;
|
|
}
|
|
} else if (matches != 4) {
|
|
goto invalid;
|
|
}
|
|
|
|
if (sectors <= 0 ||
|
|
(strcmp(type, "FLAT") && strcmp(type, "SPARSE") &&
|
|
strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE")) ||
|
|
(strcmp(access, "RW"))) {
|
|
continue;
|
|
}
|
|
|
|
if (!path_is_absolute(fname) && !path_has_protocol(fname) &&
|
|
!desc_file_path[0])
|
|
{
|
|
error_setg(errp, "Cannot use relative extent paths with VMDK "
|
|
"descriptor file '%s'", bs->file->bs->filename);
|
|
return -EINVAL;
|
|
}
|
|
|
|
extent_path = g_malloc0(PATH_MAX);
|
|
path_combine(extent_path, PATH_MAX, desc_file_path, fname);
|
|
|
|
ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents);
|
|
assert(ret < 32);
|
|
|
|
extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix,
|
|
bs, &child_file, false, &local_err);
|
|
g_free(extent_path);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* save to extents array */
|
|
if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) {
|
|
/* FLAT extent */
|
|
|
|
ret = vmdk_add_extent(bs, extent_file, true, sectors,
|
|
0, 0, 0, 0, 0, &extent, errp);
|
|
if (ret < 0) {
|
|
bdrv_unref_child(bs, extent_file);
|
|
return ret;
|
|
}
|
|
extent->flat_start_offset = flat_offset << 9;
|
|
} else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) {
|
|
/* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/
|
|
char *buf = vmdk_read_desc(extent_file->bs, 0, errp);
|
|
if (!buf) {
|
|
ret = -EINVAL;
|
|
} else {
|
|
ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf,
|
|
options, errp);
|
|
}
|
|
g_free(buf);
|
|
if (ret) {
|
|
bdrv_unref_child(bs, extent_file);
|
|
return ret;
|
|
}
|
|
extent = &s->extents[s->num_extents - 1];
|
|
} else {
|
|
error_setg(errp, "Unsupported extent type '%s'", type);
|
|
bdrv_unref_child(bs, extent_file);
|
|
return -ENOTSUP;
|
|
}
|
|
extent->type = g_strdup(type);
|
|
}
|
|
return 0;
|
|
|
|
invalid:
|
|
np = next_line(p);
|
|
assert(np != p);
|
|
if (np[-1] == '\n') {
|
|
np--;
|
|
}
|
|
error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
|
|
QDict *options, Error **errp)
|
|
{
|
|
int ret;
|
|
char ct[128];
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) {
|
|
error_setg(errp, "invalid VMDK image descriptor");
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
if (strcmp(ct, "monolithicFlat") &&
|
|
strcmp(ct, "vmfs") &&
|
|
strcmp(ct, "vmfsSparse") &&
|
|
strcmp(ct, "twoGbMaxExtentSparse") &&
|
|
strcmp(ct, "twoGbMaxExtentFlat")) {
|
|
error_setg(errp, "Unsupported image type '%s'", ct);
|
|
ret = -ENOTSUP;
|
|
goto exit;
|
|
}
|
|
s->create_type = g_strdup(ct);
|
|
s->desc_offset = 0;
|
|
ret = vmdk_parse_extents(buf, bs, bs->file->bs->exact_filename, options,
|
|
errp);
|
|
exit:
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_open(BlockDriverState *bs, QDict *options, int flags,
|
|
Error **errp)
|
|
{
|
|
char *buf;
|
|
int ret;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
uint32_t magic;
|
|
|
|
buf = vmdk_read_desc(bs->file->bs, 0, errp);
|
|
if (!buf) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
magic = ldl_be_p(buf);
|
|
switch (magic) {
|
|
case VMDK3_MAGIC:
|
|
case VMDK4_MAGIC:
|
|
ret = vmdk_open_sparse(bs, bs->file, flags, buf, options,
|
|
errp);
|
|
s->desc_offset = 0x200;
|
|
break;
|
|
default:
|
|
ret = vmdk_open_desc_file(bs, flags, buf, options, errp);
|
|
break;
|
|
}
|
|
if (ret) {
|
|
goto fail;
|
|
}
|
|
|
|
/* try to open parent images, if exist */
|
|
ret = vmdk_parent_open(bs);
|
|
if (ret) {
|
|
goto fail;
|
|
}
|
|
s->cid = vmdk_read_cid(bs, 0);
|
|
s->parent_cid = vmdk_read_cid(bs, 1);
|
|
qemu_co_mutex_init(&s->lock);
|
|
|
|
/* Disable migration when VMDK images are used */
|
|
error_setg(&s->migration_blocker, "The vmdk format used by node '%s' "
|
|
"does not support live migration",
|
|
bdrv_get_device_or_node_name(bs));
|
|
migrate_add_blocker(s->migration_blocker);
|
|
g_free(buf);
|
|
return 0;
|
|
|
|
fail:
|
|
g_free(buf);
|
|
g_free(s->create_type);
|
|
s->create_type = NULL;
|
|
vmdk_free_extents(bs);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int i;
|
|
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
if (!s->extents[i].flat) {
|
|
bs->bl.write_zeroes_alignment =
|
|
MAX(bs->bl.write_zeroes_alignment,
|
|
s->extents[i].cluster_sectors);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* get_whole_cluster
|
|
*
|
|
* Copy backing file's cluster that covers @sector_num, otherwise write zero,
|
|
* to the cluster at @cluster_sector_num.
|
|
*
|
|
* If @skip_start_sector < @skip_end_sector, the relative range
|
|
* [@skip_start_sector, @skip_end_sector) is not copied or written, and leave
|
|
* it for call to write user data in the request.
|
|
*/
|
|
static int get_whole_cluster(BlockDriverState *bs,
|
|
VmdkExtent *extent,
|
|
uint64_t cluster_sector_num,
|
|
uint64_t sector_num,
|
|
uint64_t skip_start_sector,
|
|
uint64_t skip_end_sector)
|
|
{
|
|
int ret = VMDK_OK;
|
|
int64_t cluster_bytes;
|
|
uint8_t *whole_grain;
|
|
|
|
/* For COW, align request sector_num to cluster start */
|
|
sector_num = QEMU_ALIGN_DOWN(sector_num, extent->cluster_sectors);
|
|
cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS;
|
|
whole_grain = qemu_blockalign(bs, cluster_bytes);
|
|
|
|
if (!bs->backing) {
|
|
memset(whole_grain, 0, skip_start_sector << BDRV_SECTOR_BITS);
|
|
memset(whole_grain + (skip_end_sector << BDRV_SECTOR_BITS), 0,
|
|
cluster_bytes - (skip_end_sector << BDRV_SECTOR_BITS));
|
|
}
|
|
|
|
assert(skip_end_sector <= extent->cluster_sectors);
|
|
/* we will be here if it's first write on non-exist grain(cluster).
|
|
* try to read from parent image, if exist */
|
|
if (bs->backing && !vmdk_is_cid_valid(bs)) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
|
|
/* Read backing data before skip range */
|
|
if (skip_start_sector > 0) {
|
|
if (bs->backing) {
|
|
ret = bdrv_read(bs->backing->bs, sector_num,
|
|
whole_grain, skip_start_sector);
|
|
if (ret < 0) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
}
|
|
ret = bdrv_write(extent->file->bs, cluster_sector_num, whole_grain,
|
|
skip_start_sector);
|
|
if (ret < 0) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
}
|
|
/* Read backing data after skip range */
|
|
if (skip_end_sector < extent->cluster_sectors) {
|
|
if (bs->backing) {
|
|
ret = bdrv_read(bs->backing->bs, sector_num + skip_end_sector,
|
|
whole_grain + (skip_end_sector << BDRV_SECTOR_BITS),
|
|
extent->cluster_sectors - skip_end_sector);
|
|
if (ret < 0) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
}
|
|
ret = bdrv_write(extent->file->bs, cluster_sector_num + skip_end_sector,
|
|
whole_grain + (skip_end_sector << BDRV_SECTOR_BITS),
|
|
extent->cluster_sectors - skip_end_sector);
|
|
if (ret < 0) {
|
|
ret = VMDK_ERROR;
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
exit:
|
|
qemu_vfree(whole_grain);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data,
|
|
uint32_t offset)
|
|
{
|
|
offset = cpu_to_le32(offset);
|
|
/* update L2 table */
|
|
if (bdrv_pwrite_sync(
|
|
extent->file->bs,
|
|
((int64_t)m_data->l2_offset * 512)
|
|
+ (m_data->l2_index * sizeof(offset)),
|
|
&offset, sizeof(offset)) < 0) {
|
|
return VMDK_ERROR;
|
|
}
|
|
/* update backup L2 table */
|
|
if (extent->l1_backup_table_offset != 0) {
|
|
m_data->l2_offset = extent->l1_backup_table[m_data->l1_index];
|
|
if (bdrv_pwrite_sync(
|
|
extent->file->bs,
|
|
((int64_t)m_data->l2_offset * 512)
|
|
+ (m_data->l2_index * sizeof(offset)),
|
|
&offset, sizeof(offset)) < 0) {
|
|
return VMDK_ERROR;
|
|
}
|
|
}
|
|
if (m_data->l2_cache_entry) {
|
|
*m_data->l2_cache_entry = offset;
|
|
}
|
|
|
|
return VMDK_OK;
|
|
}
|
|
|
|
/**
|
|
* get_cluster_offset
|
|
*
|
|
* Look up cluster offset in extent file by sector number, and store in
|
|
* @cluster_offset.
|
|
*
|
|
* For flat extents, the start offset as parsed from the description file is
|
|
* returned.
|
|
*
|
|
* For sparse extents, look up in L1, L2 table. If allocate is true, return an
|
|
* offset for a new cluster and update L2 cache. If there is a backing file,
|
|
* COW is done before returning; otherwise, zeroes are written to the allocated
|
|
* cluster. Both COW and zero writing skips the sector range
|
|
* [@skip_start_sector, @skip_end_sector) passed in by caller, because caller
|
|
* has new data to write there.
|
|
*
|
|
* Returns: VMDK_OK if cluster exists and mapped in the image.
|
|
* VMDK_UNALLOC if cluster is not mapped and @allocate is false.
|
|
* VMDK_ERROR if failed.
|
|
*/
|
|
static int get_cluster_offset(BlockDriverState *bs,
|
|
VmdkExtent *extent,
|
|
VmdkMetaData *m_data,
|
|
uint64_t offset,
|
|
bool allocate,
|
|
uint64_t *cluster_offset,
|
|
uint64_t skip_start_sector,
|
|
uint64_t skip_end_sector)
|
|
{
|
|
unsigned int l1_index, l2_offset, l2_index;
|
|
int min_index, i, j;
|
|
uint32_t min_count, *l2_table;
|
|
bool zeroed = false;
|
|
int64_t ret;
|
|
int64_t cluster_sector;
|
|
|
|
if (m_data) {
|
|
m_data->valid = 0;
|
|
}
|
|
if (extent->flat) {
|
|
*cluster_offset = extent->flat_start_offset;
|
|
return VMDK_OK;
|
|
}
|
|
|
|
offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE;
|
|
l1_index = (offset >> 9) / extent->l1_entry_sectors;
|
|
if (l1_index >= extent->l1_size) {
|
|
return VMDK_ERROR;
|
|
}
|
|
l2_offset = extent->l1_table[l1_index];
|
|
if (!l2_offset) {
|
|
return VMDK_UNALLOC;
|
|
}
|
|
for (i = 0; i < L2_CACHE_SIZE; i++) {
|
|
if (l2_offset == extent->l2_cache_offsets[i]) {
|
|
/* increment the hit count */
|
|
if (++extent->l2_cache_counts[i] == 0xffffffff) {
|
|
for (j = 0; j < L2_CACHE_SIZE; j++) {
|
|
extent->l2_cache_counts[j] >>= 1;
|
|
}
|
|
}
|
|
l2_table = extent->l2_cache + (i * extent->l2_size);
|
|
goto found;
|
|
}
|
|
}
|
|
/* not found: load a new entry in the least used one */
|
|
min_index = 0;
|
|
min_count = 0xffffffff;
|
|
for (i = 0; i < L2_CACHE_SIZE; i++) {
|
|
if (extent->l2_cache_counts[i] < min_count) {
|
|
min_count = extent->l2_cache_counts[i];
|
|
min_index = i;
|
|
}
|
|
}
|
|
l2_table = extent->l2_cache + (min_index * extent->l2_size);
|
|
if (bdrv_pread(
|
|
extent->file->bs,
|
|
(int64_t)l2_offset * 512,
|
|
l2_table,
|
|
extent->l2_size * sizeof(uint32_t)
|
|
) != extent->l2_size * sizeof(uint32_t)) {
|
|
return VMDK_ERROR;
|
|
}
|
|
|
|
extent->l2_cache_offsets[min_index] = l2_offset;
|
|
extent->l2_cache_counts[min_index] = 1;
|
|
found:
|
|
l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size;
|
|
cluster_sector = le32_to_cpu(l2_table[l2_index]);
|
|
|
|
if (m_data) {
|
|
m_data->valid = 1;
|
|
m_data->l1_index = l1_index;
|
|
m_data->l2_index = l2_index;
|
|
m_data->l2_offset = l2_offset;
|
|
m_data->l2_cache_entry = &l2_table[l2_index];
|
|
}
|
|
if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) {
|
|
zeroed = true;
|
|
}
|
|
|
|
if (!cluster_sector || zeroed) {
|
|
if (!allocate) {
|
|
return zeroed ? VMDK_ZEROED : VMDK_UNALLOC;
|
|
}
|
|
|
|
cluster_sector = extent->next_cluster_sector;
|
|
extent->next_cluster_sector += extent->cluster_sectors;
|
|
|
|
/* First of all we write grain itself, to avoid race condition
|
|
* that may to corrupt the image.
|
|
* This problem may occur because of insufficient space on host disk
|
|
* or inappropriate VM shutdown.
|
|
*/
|
|
ret = get_whole_cluster(bs, extent,
|
|
cluster_sector,
|
|
offset >> BDRV_SECTOR_BITS,
|
|
skip_start_sector, skip_end_sector);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
}
|
|
*cluster_offset = cluster_sector << BDRV_SECTOR_BITS;
|
|
return VMDK_OK;
|
|
}
|
|
|
|
static VmdkExtent *find_extent(BDRVVmdkState *s,
|
|
int64_t sector_num, VmdkExtent *start_hint)
|
|
{
|
|
VmdkExtent *extent = start_hint;
|
|
|
|
if (!extent) {
|
|
extent = &s->extents[0];
|
|
}
|
|
while (extent < &s->extents[s->num_extents]) {
|
|
if (sector_num < extent->end_sector) {
|
|
return extent;
|
|
}
|
|
extent++;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static inline uint64_t vmdk_find_index_in_cluster(VmdkExtent *extent,
|
|
int64_t sector_num)
|
|
{
|
|
uint64_t index_in_cluster, extent_begin_sector, extent_relative_sector_num;
|
|
|
|
extent_begin_sector = extent->end_sector - extent->sectors;
|
|
extent_relative_sector_num = sector_num - extent_begin_sector;
|
|
index_in_cluster = extent_relative_sector_num % extent->cluster_sectors;
|
|
return index_in_cluster;
|
|
}
|
|
|
|
static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
|
|
int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int64_t index_in_cluster, n, ret;
|
|
uint64_t offset;
|
|
VmdkExtent *extent;
|
|
|
|
extent = find_extent(s, sector_num, NULL);
|
|
if (!extent) {
|
|
return 0;
|
|
}
|
|
qemu_co_mutex_lock(&s->lock);
|
|
ret = get_cluster_offset(bs, extent, NULL,
|
|
sector_num * 512, false, &offset,
|
|
0, 0);
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
|
|
index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
|
|
switch (ret) {
|
|
case VMDK_ERROR:
|
|
ret = -EIO;
|
|
break;
|
|
case VMDK_UNALLOC:
|
|
ret = 0;
|
|
break;
|
|
case VMDK_ZEROED:
|
|
ret = BDRV_BLOCK_ZERO;
|
|
break;
|
|
case VMDK_OK:
|
|
ret = BDRV_BLOCK_DATA;
|
|
if (!extent->compressed) {
|
|
ret |= BDRV_BLOCK_OFFSET_VALID;
|
|
ret |= (offset + (index_in_cluster << BDRV_SECTOR_BITS))
|
|
& BDRV_BLOCK_OFFSET_MASK;
|
|
}
|
|
*file = extent->file->bs;
|
|
break;
|
|
}
|
|
|
|
n = extent->cluster_sectors - index_in_cluster;
|
|
if (n > nb_sectors) {
|
|
n = nb_sectors;
|
|
}
|
|
*pnum = n;
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset,
|
|
int64_t offset_in_cluster, const uint8_t *buf,
|
|
int nb_sectors, int64_t sector_num)
|
|
{
|
|
int ret;
|
|
VmdkGrainMarker *data = NULL;
|
|
uLongf buf_len;
|
|
const uint8_t *write_buf = buf;
|
|
int write_len = nb_sectors * 512;
|
|
int64_t write_offset;
|
|
int64_t write_end_sector;
|
|
|
|
if (extent->compressed) {
|
|
if (!extent->has_marker) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
buf_len = (extent->cluster_sectors << 9) * 2;
|
|
data = g_malloc(buf_len + sizeof(VmdkGrainMarker));
|
|
if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK ||
|
|
buf_len == 0) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
data->lba = sector_num;
|
|
data->size = buf_len;
|
|
write_buf = (uint8_t *)data;
|
|
write_len = buf_len + sizeof(VmdkGrainMarker);
|
|
}
|
|
write_offset = cluster_offset + offset_in_cluster,
|
|
ret = bdrv_pwrite(extent->file->bs, write_offset, write_buf, write_len);
|
|
|
|
write_end_sector = DIV_ROUND_UP(write_offset + write_len, BDRV_SECTOR_SIZE);
|
|
|
|
if (extent->compressed) {
|
|
extent->next_cluster_sector = write_end_sector;
|
|
} else {
|
|
extent->next_cluster_sector = MAX(extent->next_cluster_sector,
|
|
write_end_sector);
|
|
}
|
|
|
|
if (ret != write_len) {
|
|
ret = ret < 0 ? ret : -EIO;
|
|
goto out;
|
|
}
|
|
ret = 0;
|
|
out:
|
|
g_free(data);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset,
|
|
int64_t offset_in_cluster, uint8_t *buf,
|
|
int nb_sectors)
|
|
{
|
|
int ret;
|
|
int cluster_bytes, buf_bytes;
|
|
uint8_t *cluster_buf, *compressed_data;
|
|
uint8_t *uncomp_buf;
|
|
uint32_t data_len;
|
|
VmdkGrainMarker *marker;
|
|
uLongf buf_len;
|
|
|
|
|
|
if (!extent->compressed) {
|
|
ret = bdrv_pread(extent->file->bs,
|
|
cluster_offset + offset_in_cluster,
|
|
buf, nb_sectors * 512);
|
|
if (ret == nb_sectors * 512) {
|
|
return 0;
|
|
} else {
|
|
return -EIO;
|
|
}
|
|
}
|
|
cluster_bytes = extent->cluster_sectors * 512;
|
|
/* Read two clusters in case GrainMarker + compressed data > one cluster */
|
|
buf_bytes = cluster_bytes * 2;
|
|
cluster_buf = g_malloc(buf_bytes);
|
|
uncomp_buf = g_malloc(cluster_bytes);
|
|
ret = bdrv_pread(extent->file->bs,
|
|
cluster_offset,
|
|
cluster_buf, buf_bytes);
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
compressed_data = cluster_buf;
|
|
buf_len = cluster_bytes;
|
|
data_len = cluster_bytes;
|
|
if (extent->has_marker) {
|
|
marker = (VmdkGrainMarker *)cluster_buf;
|
|
compressed_data = marker->data;
|
|
data_len = le32_to_cpu(marker->size);
|
|
}
|
|
if (!data_len || data_len > buf_bytes) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len);
|
|
if (ret != Z_OK) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
|
|
}
|
|
if (offset_in_cluster < 0 ||
|
|
offset_in_cluster + nb_sectors * 512 > buf_len) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512);
|
|
ret = 0;
|
|
|
|
out:
|
|
g_free(uncomp_buf);
|
|
g_free(cluster_buf);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_read(BlockDriverState *bs, int64_t sector_num,
|
|
uint8_t *buf, int nb_sectors)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int ret;
|
|
uint64_t n, index_in_cluster;
|
|
VmdkExtent *extent = NULL;
|
|
uint64_t cluster_offset;
|
|
|
|
while (nb_sectors > 0) {
|
|
extent = find_extent(s, sector_num, extent);
|
|
if (!extent) {
|
|
return -EIO;
|
|
}
|
|
ret = get_cluster_offset(bs, extent, NULL,
|
|
sector_num << 9, false, &cluster_offset,
|
|
0, 0);
|
|
index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
|
|
n = extent->cluster_sectors - index_in_cluster;
|
|
if (n > nb_sectors) {
|
|
n = nb_sectors;
|
|
}
|
|
if (ret != VMDK_OK) {
|
|
/* if not allocated, try to read from parent image, if exist */
|
|
if (bs->backing && ret != VMDK_ZEROED) {
|
|
if (!vmdk_is_cid_valid(bs)) {
|
|
return -EINVAL;
|
|
}
|
|
ret = bdrv_read(bs->backing->bs, sector_num, buf, n);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
} else {
|
|
memset(buf, 0, 512 * n);
|
|
}
|
|
} else {
|
|
ret = vmdk_read_extent(extent,
|
|
cluster_offset, index_in_cluster * 512,
|
|
buf, n);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
}
|
|
nb_sectors -= n;
|
|
sector_num += n;
|
|
buf += n * 512;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num,
|
|
uint8_t *buf, int nb_sectors)
|
|
{
|
|
int ret;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
qemu_co_mutex_lock(&s->lock);
|
|
ret = vmdk_read(bs, sector_num, buf, nb_sectors);
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* vmdk_write:
|
|
* @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature
|
|
* if possible, otherwise return -ENOTSUP.
|
|
* @zero_dry_run: used for zeroed == true only, don't update L2 table, just try
|
|
* with each cluster. By dry run we can find if the zero write
|
|
* is possible without modifying image data.
|
|
*
|
|
* Returns: error code with 0 for success.
|
|
*/
|
|
static int vmdk_write(BlockDriverState *bs, int64_t sector_num,
|
|
const uint8_t *buf, int nb_sectors,
|
|
bool zeroed, bool zero_dry_run)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
VmdkExtent *extent = NULL;
|
|
int ret;
|
|
int64_t index_in_cluster, n;
|
|
uint64_t cluster_offset;
|
|
VmdkMetaData m_data;
|
|
|
|
if (sector_num > bs->total_sectors) {
|
|
error_report("Wrong offset: sector_num=0x%" PRIx64
|
|
" total_sectors=0x%" PRIx64,
|
|
sector_num, bs->total_sectors);
|
|
return -EIO;
|
|
}
|
|
|
|
while (nb_sectors > 0) {
|
|
extent = find_extent(s, sector_num, extent);
|
|
if (!extent) {
|
|
return -EIO;
|
|
}
|
|
index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
|
|
n = extent->cluster_sectors - index_in_cluster;
|
|
if (n > nb_sectors) {
|
|
n = nb_sectors;
|
|
}
|
|
ret = get_cluster_offset(bs, extent, &m_data, sector_num << 9,
|
|
!(extent->compressed || zeroed),
|
|
&cluster_offset,
|
|
index_in_cluster, index_in_cluster + n);
|
|
if (extent->compressed) {
|
|
if (ret == VMDK_OK) {
|
|
/* Refuse write to allocated cluster for streamOptimized */
|
|
error_report("Could not write to allocated cluster"
|
|
" for streamOptimized");
|
|
return -EIO;
|
|
} else {
|
|
/* allocate */
|
|
ret = get_cluster_offset(bs, extent, &m_data, sector_num << 9,
|
|
true, &cluster_offset, 0, 0);
|
|
}
|
|
}
|
|
if (ret == VMDK_ERROR) {
|
|
return -EINVAL;
|
|
}
|
|
if (zeroed) {
|
|
/* Do zeroed write, buf is ignored */
|
|
if (extent->has_zero_grain &&
|
|
index_in_cluster == 0 &&
|
|
n >= extent->cluster_sectors) {
|
|
n = extent->cluster_sectors;
|
|
if (!zero_dry_run) {
|
|
/* update L2 tables */
|
|
if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED)
|
|
!= VMDK_OK) {
|
|
return -EIO;
|
|
}
|
|
}
|
|
} else {
|
|
return -ENOTSUP;
|
|
}
|
|
} else {
|
|
ret = vmdk_write_extent(extent,
|
|
cluster_offset, index_in_cluster * 512,
|
|
buf, n, sector_num);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
if (m_data.valid) {
|
|
/* update L2 tables */
|
|
if (vmdk_L2update(extent, &m_data,
|
|
cluster_offset >> BDRV_SECTOR_BITS)
|
|
!= VMDK_OK) {
|
|
return -EIO;
|
|
}
|
|
}
|
|
}
|
|
nb_sectors -= n;
|
|
sector_num += n;
|
|
buf += n * 512;
|
|
|
|
/* update CID on the first write every time the virtual disk is
|
|
* opened */
|
|
if (!s->cid_updated) {
|
|
ret = vmdk_write_cid(bs, g_random_int());
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
s->cid_updated = true;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num,
|
|
const uint8_t *buf, int nb_sectors)
|
|
{
|
|
int ret;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
qemu_co_mutex_lock(&s->lock);
|
|
ret = vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_write_compressed(BlockDriverState *bs,
|
|
int64_t sector_num,
|
|
const uint8_t *buf,
|
|
int nb_sectors)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
if (s->num_extents == 1 && s->extents[0].compressed) {
|
|
return vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
|
|
} else {
|
|
return -ENOTSUP;
|
|
}
|
|
}
|
|
|
|
static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs,
|
|
int64_t sector_num,
|
|
int nb_sectors,
|
|
BdrvRequestFlags flags)
|
|
{
|
|
int ret;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
qemu_co_mutex_lock(&s->lock);
|
|
/* write zeroes could fail if sectors not aligned to cluster, test it with
|
|
* dry_run == true before really updating image */
|
|
ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, true);
|
|
if (!ret) {
|
|
ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, false);
|
|
}
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_create_extent(const char *filename, int64_t filesize,
|
|
bool flat, bool compress, bool zeroed_grain,
|
|
QemuOpts *opts, Error **errp)
|
|
{
|
|
int ret, i;
|
|
BlockDriverState *bs = NULL;
|
|
VMDK4Header header;
|
|
Error *local_err = NULL;
|
|
uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count;
|
|
uint32_t *gd_buf = NULL;
|
|
int gd_buf_size;
|
|
|
|
ret = bdrv_create_file(filename, opts, &local_err);
|
|
if (ret < 0) {
|
|
error_propagate(errp, local_err);
|
|
goto exit;
|
|
}
|
|
|
|
assert(bs == NULL);
|
|
ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
|
|
&local_err);
|
|
if (ret < 0) {
|
|
error_propagate(errp, local_err);
|
|
goto exit;
|
|
}
|
|
|
|
if (flat) {
|
|
ret = bdrv_truncate(bs, filesize);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Could not truncate file");
|
|
}
|
|
goto exit;
|
|
}
|
|
magic = cpu_to_be32(VMDK4_MAGIC);
|
|
memset(&header, 0, sizeof(header));
|
|
if (compress) {
|
|
header.version = 3;
|
|
} else if (zeroed_grain) {
|
|
header.version = 2;
|
|
} else {
|
|
header.version = 1;
|
|
}
|
|
header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT
|
|
| (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0)
|
|
| (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0);
|
|
header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0;
|
|
header.capacity = filesize / BDRV_SECTOR_SIZE;
|
|
header.granularity = 128;
|
|
header.num_gtes_per_gt = BDRV_SECTOR_SIZE;
|
|
|
|
grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity);
|
|
gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t),
|
|
BDRV_SECTOR_SIZE);
|
|
gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt);
|
|
gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE);
|
|
|
|
header.desc_offset = 1;
|
|
header.desc_size = 20;
|
|
header.rgd_offset = header.desc_offset + header.desc_size;
|
|
header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count);
|
|
header.grain_offset =
|
|
ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count),
|
|
header.granularity);
|
|
/* swap endianness for all header fields */
|
|
header.version = cpu_to_le32(header.version);
|
|
header.flags = cpu_to_le32(header.flags);
|
|
header.capacity = cpu_to_le64(header.capacity);
|
|
header.granularity = cpu_to_le64(header.granularity);
|
|
header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt);
|
|
header.desc_offset = cpu_to_le64(header.desc_offset);
|
|
header.desc_size = cpu_to_le64(header.desc_size);
|
|
header.rgd_offset = cpu_to_le64(header.rgd_offset);
|
|
header.gd_offset = cpu_to_le64(header.gd_offset);
|
|
header.grain_offset = cpu_to_le64(header.grain_offset);
|
|
header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm);
|
|
|
|
header.check_bytes[0] = 0xa;
|
|
header.check_bytes[1] = 0x20;
|
|
header.check_bytes[2] = 0xd;
|
|
header.check_bytes[3] = 0xa;
|
|
|
|
/* write all the data */
|
|
ret = bdrv_pwrite(bs, 0, &magic, sizeof(magic));
|
|
if (ret < 0) {
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
goto exit;
|
|
}
|
|
ret = bdrv_pwrite(bs, sizeof(magic), &header, sizeof(header));
|
|
if (ret < 0) {
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
goto exit;
|
|
}
|
|
|
|
ret = bdrv_truncate(bs, le64_to_cpu(header.grain_offset) << 9);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Could not truncate file");
|
|
goto exit;
|
|
}
|
|
|
|
/* write grain directory */
|
|
gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE;
|
|
gd_buf = g_malloc0(gd_buf_size);
|
|
for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors;
|
|
i < gt_count; i++, tmp += gt_size) {
|
|
gd_buf[i] = cpu_to_le32(tmp);
|
|
}
|
|
ret = bdrv_pwrite(bs, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE,
|
|
gd_buf, gd_buf_size);
|
|
if (ret < 0) {
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
goto exit;
|
|
}
|
|
|
|
/* write backup grain directory */
|
|
for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors;
|
|
i < gt_count; i++, tmp += gt_size) {
|
|
gd_buf[i] = cpu_to_le32(tmp);
|
|
}
|
|
ret = bdrv_pwrite(bs, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE,
|
|
gd_buf, gd_buf_size);
|
|
if (ret < 0) {
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
goto exit;
|
|
}
|
|
|
|
ret = 0;
|
|
exit:
|
|
if (bs) {
|
|
bdrv_unref(bs);
|
|
}
|
|
g_free(gd_buf);
|
|
return ret;
|
|
}
|
|
|
|
static int filename_decompose(const char *filename, char *path, char *prefix,
|
|
char *postfix, size_t buf_len, Error **errp)
|
|
{
|
|
const char *p, *q;
|
|
|
|
if (filename == NULL || !strlen(filename)) {
|
|
error_setg(errp, "No filename provided");
|
|
return VMDK_ERROR;
|
|
}
|
|
p = strrchr(filename, '/');
|
|
if (p == NULL) {
|
|
p = strrchr(filename, '\\');
|
|
}
|
|
if (p == NULL) {
|
|
p = strrchr(filename, ':');
|
|
}
|
|
if (p != NULL) {
|
|
p++;
|
|
if (p - filename >= buf_len) {
|
|
return VMDK_ERROR;
|
|
}
|
|
pstrcpy(path, p - filename + 1, filename);
|
|
} else {
|
|
p = filename;
|
|
path[0] = '\0';
|
|
}
|
|
q = strrchr(p, '.');
|
|
if (q == NULL) {
|
|
pstrcpy(prefix, buf_len, p);
|
|
postfix[0] = '\0';
|
|
} else {
|
|
if (q - p >= buf_len) {
|
|
return VMDK_ERROR;
|
|
}
|
|
pstrcpy(prefix, q - p + 1, p);
|
|
pstrcpy(postfix, buf_len, q);
|
|
}
|
|
return VMDK_OK;
|
|
}
|
|
|
|
static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
|
|
{
|
|
int idx = 0;
|
|
BlockDriverState *new_bs = NULL;
|
|
Error *local_err = NULL;
|
|
char *desc = NULL;
|
|
int64_t total_size = 0, filesize;
|
|
char *adapter_type = NULL;
|
|
char *backing_file = NULL;
|
|
char *fmt = NULL;
|
|
int flags = 0;
|
|
int ret = 0;
|
|
bool flat, split, compress;
|
|
GString *ext_desc_lines;
|
|
char *path = g_malloc0(PATH_MAX);
|
|
char *prefix = g_malloc0(PATH_MAX);
|
|
char *postfix = g_malloc0(PATH_MAX);
|
|
char *desc_line = g_malloc0(BUF_SIZE);
|
|
char *ext_filename = g_malloc0(PATH_MAX);
|
|
char *desc_filename = g_malloc0(PATH_MAX);
|
|
const int64_t split_size = 0x80000000; /* VMDK has constant split size */
|
|
const char *desc_extent_line;
|
|
char *parent_desc_line = g_malloc0(BUF_SIZE);
|
|
uint32_t parent_cid = 0xffffffff;
|
|
uint32_t number_heads = 16;
|
|
bool zeroed_grain = false;
|
|
uint32_t desc_offset = 0, desc_len;
|
|
const char desc_template[] =
|
|
"# Disk DescriptorFile\n"
|
|
"version=1\n"
|
|
"CID=%" PRIx32 "\n"
|
|
"parentCID=%" PRIx32 "\n"
|
|
"createType=\"%s\"\n"
|
|
"%s"
|
|
"\n"
|
|
"# Extent description\n"
|
|
"%s"
|
|
"\n"
|
|
"# The Disk Data Base\n"
|
|
"#DDB\n"
|
|
"\n"
|
|
"ddb.virtualHWVersion = \"%d\"\n"
|
|
"ddb.geometry.cylinders = \"%" PRId64 "\"\n"
|
|
"ddb.geometry.heads = \"%" PRIu32 "\"\n"
|
|
"ddb.geometry.sectors = \"63\"\n"
|
|
"ddb.adapterType = \"%s\"\n";
|
|
|
|
ext_desc_lines = g_string_new(NULL);
|
|
|
|
if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) {
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
/* Read out options */
|
|
total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
|
|
BDRV_SECTOR_SIZE);
|
|
adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE);
|
|
backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
|
|
if (qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false)) {
|
|
flags |= BLOCK_FLAG_COMPAT6;
|
|
}
|
|
fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
|
|
if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false)) {
|
|
zeroed_grain = true;
|
|
}
|
|
|
|
if (!adapter_type) {
|
|
adapter_type = g_strdup("ide");
|
|
} else if (strcmp(adapter_type, "ide") &&
|
|
strcmp(adapter_type, "buslogic") &&
|
|
strcmp(adapter_type, "lsilogic") &&
|
|
strcmp(adapter_type, "legacyESX")) {
|
|
error_setg(errp, "Unknown adapter type: '%s'", adapter_type);
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
if (strcmp(adapter_type, "ide") != 0) {
|
|
/* that's the number of heads with which vmware operates when
|
|
creating, exporting, etc. vmdk files with a non-ide adapter type */
|
|
number_heads = 255;
|
|
}
|
|
if (!fmt) {
|
|
/* Default format to monolithicSparse */
|
|
fmt = g_strdup("monolithicSparse");
|
|
} else if (strcmp(fmt, "monolithicFlat") &&
|
|
strcmp(fmt, "monolithicSparse") &&
|
|
strcmp(fmt, "twoGbMaxExtentSparse") &&
|
|
strcmp(fmt, "twoGbMaxExtentFlat") &&
|
|
strcmp(fmt, "streamOptimized")) {
|
|
error_setg(errp, "Unknown subformat: '%s'", fmt);
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
split = !(strcmp(fmt, "twoGbMaxExtentFlat") &&
|
|
strcmp(fmt, "twoGbMaxExtentSparse"));
|
|
flat = !(strcmp(fmt, "monolithicFlat") &&
|
|
strcmp(fmt, "twoGbMaxExtentFlat"));
|
|
compress = !strcmp(fmt, "streamOptimized");
|
|
if (flat) {
|
|
desc_extent_line = "RW %" PRId64 " FLAT \"%s\" 0\n";
|
|
} else {
|
|
desc_extent_line = "RW %" PRId64 " SPARSE \"%s\"\n";
|
|
}
|
|
if (flat && backing_file) {
|
|
error_setg(errp, "Flat image can't have backing file");
|
|
ret = -ENOTSUP;
|
|
goto exit;
|
|
}
|
|
if (flat && zeroed_grain) {
|
|
error_setg(errp, "Flat image can't enable zeroed grain");
|
|
ret = -ENOTSUP;
|
|
goto exit;
|
|
}
|
|
if (backing_file) {
|
|
BlockDriverState *bs = NULL;
|
|
char *full_backing = g_new0(char, PATH_MAX);
|
|
bdrv_get_full_backing_filename_from_filename(filename, backing_file,
|
|
full_backing, PATH_MAX,
|
|
&local_err);
|
|
if (local_err) {
|
|
g_free(full_backing);
|
|
error_propagate(errp, local_err);
|
|
ret = -ENOENT;
|
|
goto exit;
|
|
}
|
|
ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, errp);
|
|
g_free(full_backing);
|
|
if (ret != 0) {
|
|
goto exit;
|
|
}
|
|
if (strcmp(bs->drv->format_name, "vmdk")) {
|
|
bdrv_unref(bs);
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
parent_cid = vmdk_read_cid(bs, 0);
|
|
bdrv_unref(bs);
|
|
snprintf(parent_desc_line, BUF_SIZE,
|
|
"parentFileNameHint=\"%s\"", backing_file);
|
|
}
|
|
|
|
/* Create extents */
|
|
filesize = total_size;
|
|
while (filesize > 0) {
|
|
int64_t size = filesize;
|
|
|
|
if (split && size > split_size) {
|
|
size = split_size;
|
|
}
|
|
if (split) {
|
|
snprintf(desc_filename, PATH_MAX, "%s-%c%03d%s",
|
|
prefix, flat ? 'f' : 's', ++idx, postfix);
|
|
} else if (flat) {
|
|
snprintf(desc_filename, PATH_MAX, "%s-flat%s", prefix, postfix);
|
|
} else {
|
|
snprintf(desc_filename, PATH_MAX, "%s%s", prefix, postfix);
|
|
}
|
|
snprintf(ext_filename, PATH_MAX, "%s%s", path, desc_filename);
|
|
|
|
if (vmdk_create_extent(ext_filename, size,
|
|
flat, compress, zeroed_grain, opts, errp)) {
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
filesize -= size;
|
|
|
|
/* Format description line */
|
|
snprintf(desc_line, BUF_SIZE,
|
|
desc_extent_line, size / BDRV_SECTOR_SIZE, desc_filename);
|
|
g_string_append(ext_desc_lines, desc_line);
|
|
}
|
|
/* generate descriptor file */
|
|
desc = g_strdup_printf(desc_template,
|
|
g_random_int(),
|
|
parent_cid,
|
|
fmt,
|
|
parent_desc_line,
|
|
ext_desc_lines->str,
|
|
(flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
|
|
total_size /
|
|
(int64_t)(63 * number_heads * BDRV_SECTOR_SIZE),
|
|
number_heads,
|
|
adapter_type);
|
|
desc_len = strlen(desc);
|
|
/* the descriptor offset = 0x200 */
|
|
if (!split && !flat) {
|
|
desc_offset = 0x200;
|
|
} else {
|
|
ret = bdrv_create_file(filename, opts, &local_err);
|
|
if (ret < 0) {
|
|
error_propagate(errp, local_err);
|
|
goto exit;
|
|
}
|
|
}
|
|
assert(new_bs == NULL);
|
|
ret = bdrv_open(&new_bs, filename, NULL, NULL,
|
|
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
|
|
if (ret < 0) {
|
|
error_propagate(errp, local_err);
|
|
goto exit;
|
|
}
|
|
ret = bdrv_pwrite(new_bs, desc_offset, desc, desc_len);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Could not write description");
|
|
goto exit;
|
|
}
|
|
/* bdrv_pwrite write padding zeros to align to sector, we don't need that
|
|
* for description file */
|
|
if (desc_offset == 0) {
|
|
ret = bdrv_truncate(new_bs, desc_len);
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Could not truncate file");
|
|
}
|
|
}
|
|
exit:
|
|
if (new_bs) {
|
|
bdrv_unref(new_bs);
|
|
}
|
|
g_free(adapter_type);
|
|
g_free(backing_file);
|
|
g_free(fmt);
|
|
g_free(desc);
|
|
g_free(path);
|
|
g_free(prefix);
|
|
g_free(postfix);
|
|
g_free(desc_line);
|
|
g_free(ext_filename);
|
|
g_free(desc_filename);
|
|
g_free(parent_desc_line);
|
|
g_string_free(ext_desc_lines, true);
|
|
return ret;
|
|
}
|
|
|
|
static void vmdk_close(BlockDriverState *bs)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
vmdk_free_extents(bs);
|
|
g_free(s->create_type);
|
|
|
|
migrate_del_blocker(s->migration_blocker);
|
|
error_free(s->migration_blocker);
|
|
}
|
|
|
|
static coroutine_fn int vmdk_co_flush(BlockDriverState *bs)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int i, err;
|
|
int ret = 0;
|
|
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
err = bdrv_co_flush(s->extents[i].file->bs);
|
|
if (err < 0) {
|
|
ret = err;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs)
|
|
{
|
|
int i;
|
|
int64_t ret = 0;
|
|
int64_t r;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
ret = bdrv_get_allocated_file_size(bs->file->bs);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
if (s->extents[i].file == bs->file) {
|
|
continue;
|
|
}
|
|
r = bdrv_get_allocated_file_size(s->extents[i].file->bs);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
ret += r;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int vmdk_has_zero_init(BlockDriverState *bs)
|
|
{
|
|
int i;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
|
|
/* If has a flat extent and its underlying storage doesn't have zero init,
|
|
* return 0. */
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
if (s->extents[i].flat) {
|
|
if (!bdrv_has_zero_init(s->extents[i].file->bs)) {
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent)
|
|
{
|
|
ImageInfo *info = g_new0(ImageInfo, 1);
|
|
|
|
*info = (ImageInfo){
|
|
.filename = g_strdup(extent->file->bs->filename),
|
|
.format = g_strdup(extent->type),
|
|
.virtual_size = extent->sectors * BDRV_SECTOR_SIZE,
|
|
.compressed = extent->compressed,
|
|
.has_compressed = extent->compressed,
|
|
.cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE,
|
|
.has_cluster_size = !extent->flat,
|
|
};
|
|
|
|
return info;
|
|
}
|
|
|
|
static int vmdk_check(BlockDriverState *bs, BdrvCheckResult *result,
|
|
BdrvCheckMode fix)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
VmdkExtent *extent = NULL;
|
|
int64_t sector_num = 0;
|
|
int64_t total_sectors = bdrv_nb_sectors(bs);
|
|
int ret;
|
|
uint64_t cluster_offset;
|
|
|
|
if (fix) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
for (;;) {
|
|
if (sector_num >= total_sectors) {
|
|
return 0;
|
|
}
|
|
extent = find_extent(s, sector_num, extent);
|
|
if (!extent) {
|
|
fprintf(stderr,
|
|
"ERROR: could not find extent for sector %" PRId64 "\n",
|
|
sector_num);
|
|
break;
|
|
}
|
|
ret = get_cluster_offset(bs, extent, NULL,
|
|
sector_num << BDRV_SECTOR_BITS,
|
|
false, &cluster_offset, 0, 0);
|
|
if (ret == VMDK_ERROR) {
|
|
fprintf(stderr,
|
|
"ERROR: could not get cluster_offset for sector %"
|
|
PRId64 "\n", sector_num);
|
|
break;
|
|
}
|
|
if (ret == VMDK_OK &&
|
|
cluster_offset >= bdrv_getlength(extent->file->bs))
|
|
{
|
|
fprintf(stderr,
|
|
"ERROR: cluster offset for sector %"
|
|
PRId64 " points after EOF\n", sector_num);
|
|
break;
|
|
}
|
|
sector_num += extent->cluster_sectors;
|
|
}
|
|
|
|
result->corruptions++;
|
|
return 0;
|
|
}
|
|
|
|
static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs)
|
|
{
|
|
int i;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1);
|
|
ImageInfoList **next;
|
|
|
|
*spec_info = (ImageInfoSpecific){
|
|
.type = IMAGE_INFO_SPECIFIC_KIND_VMDK,
|
|
{
|
|
.vmdk = g_new0(ImageInfoSpecificVmdk, 1),
|
|
},
|
|
};
|
|
|
|
*spec_info->u.vmdk = (ImageInfoSpecificVmdk) {
|
|
.create_type = g_strdup(s->create_type),
|
|
.cid = s->cid,
|
|
.parent_cid = s->parent_cid,
|
|
};
|
|
|
|
next = &spec_info->u.vmdk->extents;
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
*next = g_new0(ImageInfoList, 1);
|
|
(*next)->value = vmdk_get_extent_info(&s->extents[i]);
|
|
(*next)->next = NULL;
|
|
next = &(*next)->next;
|
|
}
|
|
|
|
return spec_info;
|
|
}
|
|
|
|
static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b)
|
|
{
|
|
return a->flat == b->flat &&
|
|
a->compressed == b->compressed &&
|
|
(a->flat || a->cluster_sectors == b->cluster_sectors);
|
|
}
|
|
|
|
static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
|
{
|
|
int i;
|
|
BDRVVmdkState *s = bs->opaque;
|
|
assert(s->num_extents);
|
|
|
|
/* See if we have multiple extents but they have different cases */
|
|
for (i = 1; i < s->num_extents; i++) {
|
|
if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) {
|
|
return -ENOTSUP;
|
|
}
|
|
}
|
|
bdi->needs_compressed_writes = s->extents[0].compressed;
|
|
if (!s->extents[0].flat) {
|
|
bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void vmdk_detach_aio_context(BlockDriverState *bs)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int i;
|
|
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
bdrv_detach_aio_context(s->extents[i].file->bs);
|
|
}
|
|
}
|
|
|
|
static void vmdk_attach_aio_context(BlockDriverState *bs,
|
|
AioContext *new_context)
|
|
{
|
|
BDRVVmdkState *s = bs->opaque;
|
|
int i;
|
|
|
|
for (i = 0; i < s->num_extents; i++) {
|
|
bdrv_attach_aio_context(s->extents[i].file->bs, new_context);
|
|
}
|
|
}
|
|
|
|
static QemuOptsList vmdk_create_opts = {
|
|
.name = "vmdk-create-opts",
|
|
.head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head),
|
|
.desc = {
|
|
{
|
|
.name = BLOCK_OPT_SIZE,
|
|
.type = QEMU_OPT_SIZE,
|
|
.help = "Virtual disk size"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_ADAPTER_TYPE,
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "Virtual adapter type, can be one of "
|
|
"ide (default), lsilogic, buslogic or legacyESX"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_BACKING_FILE,
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "File name of a base image"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_COMPAT6,
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "VMDK version 6 image",
|
|
.def_value_str = "off"
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_SUBFMT,
|
|
.type = QEMU_OPT_STRING,
|
|
.help =
|
|
"VMDK flat extent format, can be one of "
|
|
"{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} "
|
|
},
|
|
{
|
|
.name = BLOCK_OPT_ZEROED_GRAIN,
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "Enable efficient zero writes "
|
|
"using the zeroed-grain GTE feature"
|
|
},
|
|
{ /* end of list */ }
|
|
}
|
|
};
|
|
|
|
static BlockDriver bdrv_vmdk = {
|
|
.format_name = "vmdk",
|
|
.instance_size = sizeof(BDRVVmdkState),
|
|
.bdrv_probe = vmdk_probe,
|
|
.bdrv_open = vmdk_open,
|
|
.bdrv_check = vmdk_check,
|
|
.bdrv_reopen_prepare = vmdk_reopen_prepare,
|
|
.bdrv_read = vmdk_co_read,
|
|
.bdrv_write = vmdk_co_write,
|
|
.bdrv_write_compressed = vmdk_write_compressed,
|
|
.bdrv_co_write_zeroes = vmdk_co_write_zeroes,
|
|
.bdrv_close = vmdk_close,
|
|
.bdrv_create = vmdk_create,
|
|
.bdrv_co_flush_to_disk = vmdk_co_flush,
|
|
.bdrv_co_get_block_status = vmdk_co_get_block_status,
|
|
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
|
|
.bdrv_has_zero_init = vmdk_has_zero_init,
|
|
.bdrv_get_specific_info = vmdk_get_specific_info,
|
|
.bdrv_refresh_limits = vmdk_refresh_limits,
|
|
.bdrv_get_info = vmdk_get_info,
|
|
.bdrv_detach_aio_context = vmdk_detach_aio_context,
|
|
.bdrv_attach_aio_context = vmdk_attach_aio_context,
|
|
|
|
.supports_backing = true,
|
|
.create_opts = &vmdk_create_opts,
|
|
};
|
|
|
|
static void bdrv_vmdk_init(void)
|
|
{
|
|
bdrv_register(&bdrv_vmdk);
|
|
}
|
|
|
|
block_init(bdrv_vmdk_init);
|