+++ /dev/null
-/*
- * Block driver for Parallels disk image format
- *
- * Copyright (c) 2007 Alex Beregszaszi
- *
- * This code is based on comparing different disk images created by Parallels.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include "qemu-common.h"
-#include "block_int.h"
-
-/**************************************************************/
-
-#define HEADER_MAGIC "WithoutFreeSpace"
-#define HEADER_VERSION 2
-#define HEADER_SIZE 64
-
-// always little-endian
-struct parallels_header {
- char magic[16]; // "WithoutFreeSpace"
- uint32_t version;
- uint32_t heads;
- uint32_t cylinders;
- uint32_t tracks;
- uint32_t catalog_entries;
- uint32_t nb_sectors;
- char padding[24];
-} __attribute__((packed));
-
-typedef struct BDRVParallelsState {
- int fd;
-
- uint32_t *catalog_bitmap;
- int catalog_size;
-
- int tracks;
-} BDRVParallelsState;
-
-static int parallels_probe(const uint8_t *buf, int buf_size, const char *filename)
-{
- const struct parallels_header *ph = (const void *)buf;
-
- if (buf_size < HEADER_SIZE)
- return 0;
-
- if (!memcmp(ph->magic, HEADER_MAGIC, 16) &&
- (le32_to_cpu(ph->version) == HEADER_VERSION))
- return 100;
-
- return 0;
-}
-
-static int parallels_open(BlockDriverState *bs, const char *filename, int flags)
-{
- BDRVParallelsState *s = bs->opaque;
- int fd, i;
- struct parallels_header ph;
-
- fd = open(filename, O_RDWR | O_BINARY | O_LARGEFILE);
- if (fd < 0) {
- fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE);
- if (fd < 0)
- return -1;
- }
-
- bs->read_only = 1; // no write support yet
-
- s->fd = fd;
-
- if (read(fd, &ph, sizeof(ph)) != sizeof(ph))
- goto fail;
-
- if (memcmp(ph.magic, HEADER_MAGIC, 16) ||
- (le32_to_cpu(ph.version) != HEADER_VERSION)) {
- goto fail;
- }
-
- bs->total_sectors = le32_to_cpu(ph.nb_sectors);
-
- if (lseek(s->fd, 64, SEEK_SET) != 64)
- goto fail;
-
- s->tracks = le32_to_cpu(ph.tracks);
-
- s->catalog_size = le32_to_cpu(ph.catalog_entries);
- s->catalog_bitmap = qemu_malloc(s->catalog_size * 4);
- if (read(s->fd, s->catalog_bitmap, s->catalog_size * 4) !=
- s->catalog_size * 4)
- goto fail;
- for (i = 0; i < s->catalog_size; i++)
- le32_to_cpus(&s->catalog_bitmap[i]);
-
- return 0;
-fail:
- if (s->catalog_bitmap)
- qemu_free(s->catalog_bitmap);
- close(fd);
- return -1;
-}
-
-static inline int seek_to_sector(BlockDriverState *bs, int64_t sector_num)
-{
- BDRVParallelsState *s = bs->opaque;
- uint32_t index, offset, position;
-
- index = sector_num / s->tracks;
- offset = sector_num % s->tracks;
-
- // not allocated
- if ((index > s->catalog_size) || (s->catalog_bitmap[index] == 0))
- return -1;
-
- position = (s->catalog_bitmap[index] + offset) * 512;
-
-// fprintf(stderr, "sector: %llx index=%x offset=%x pointer=%x position=%x\n",
-// sector_num, index, offset, s->catalog_bitmap[index], position);
-
- if (lseek(s->fd, position, SEEK_SET) != position)
- return -1;
-
- return 0;
-}
-
-static int parallels_read(BlockDriverState *bs, int64_t sector_num,
- uint8_t *buf, int nb_sectors)
-{
- BDRVParallelsState *s = bs->opaque;
-
- while (nb_sectors > 0) {
- if (!seek_to_sector(bs, sector_num)) {
- if (read(s->fd, buf, 512) != 512)
- return -1;
- } else
- memset(buf, 0, 512);
- nb_sectors--;
- sector_num++;
- buf += 512;
- }
- return 0;
-}
-
-static void parallels_close(BlockDriverState *bs)
-{
- BDRVParallelsState *s = bs->opaque;
- qemu_free(s->catalog_bitmap);
- close(s->fd);
-}
-
-BlockDriver bdrv_parallels = {
- .format_name = "parallels",
- .instance_size = sizeof(BDRVParallelsState),
- .bdrv_probe = parallels_probe,
- .bdrv_open = parallels_open,
- .bdrv_read = parallels_read,
- .bdrv_close = parallels_close,
-};
projects / qemu / blobdiff