/* * 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-endianstruct 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 (!s->catalog_bitmap)	goto fail;    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 = {    "parallels",    sizeof(BDRVParallelsState),    parallels_probe,    parallels_open,    parallels_read,    NULL,    parallels_close,};