Archipelago » qemu

BLOCK_OBJS+=block-cow.o block-qcow.o aes.o block-vmdk.o block-cloop.o

BLOCK_OBJS+=block-dmg.o block-bochs.o block-vpc.o block-vvfat.o

BLOCK_OBJS+=block-qcow2.o block-parallels.o block-nbd.o

BLOCK_OBJS += block-raw-win32.o

BLOCK_OBJS += block-raw-posix.o

	rm -f slirp/*.o slirp/*.d audio/*.o audio/*.d

-include $(wildcard *.d audio/*.d slirp/*.d)

/*

 * Block driver for the various disk image formats used by Bochs

 * Currently only for "growing" type in read-only mode

 *

 * Copyright (c) 2005 Alex Beregszaszi

 *

 * 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"

#include "module.h"

/**************************************************************/

#define HEADER_MAGIC "Bochs Virtual HD Image"

#define HEADER_VERSION 0x00020000

#define HEADER_V1 0x00010000

#define HEADER_SIZE 512

#define REDOLOG_TYPE "Redolog"

#define GROWING_TYPE "Growing"

// not allocated: 0xffffffff

// always little-endian

struct bochs_header_v1 {

    char magic[32]; // "Bochs Virtual HD Image"

    char type[16]; // "Redolog"

    char subtype[16]; // "Undoable" / "Volatile" / "Growing"

    uint32_t version;

    uint32_t header; // size of header

    union {

	struct {

	    uint32_t catalog; // num of entries

	    uint32_t bitmap; // bitmap size

	    uint32_t extent; // extent size

	    uint64_t disk; // disk size

	    char padding[HEADER_SIZE - 64 - 8 - 20];

	} redolog;

	char padding[HEADER_SIZE - 64 - 8];

    } extra;

};

// always little-endian

struct bochs_header {

    char magic[32]; // "Bochs Virtual HD Image"

    char type[16]; // "Redolog"

    char subtype[16]; // "Undoable" / "Volatile" / "Growing"

    uint32_t version;

    uint32_t header; // size of header

    union {

	struct {

	    uint32_t catalog; // num of entries

	    uint32_t bitmap; // bitmap size

	    uint32_t extent; // extent size

	    uint32_t reserved; // for ???

	    uint64_t disk; // disk size

	    char padding[HEADER_SIZE - 64 - 8 - 24];

	} redolog;

	char padding[HEADER_SIZE - 64 - 8];

    } extra;

};

typedef struct BDRVBochsState {

    int fd;

    uint32_t *catalog_bitmap;

    int catalog_size;

    int data_offset;

    int bitmap_blocks;

    int extent_blocks;

    int extent_size;

} BDRVBochsState;

static int bochs_probe(const uint8_t *buf, int buf_size, const char *filename)

{

    const struct bochs_header *bochs = (const void *)buf;

    if (buf_size < HEADER_SIZE)

	return 0;

    if (!strcmp(bochs->magic, HEADER_MAGIC) &&

	!strcmp(bochs->type, REDOLOG_TYPE) &&

	!strcmp(bochs->subtype, GROWING_TYPE) &&

	((le32_to_cpu(bochs->version) == HEADER_VERSION) ||

	(le32_to_cpu(bochs->version) == HEADER_V1)))

	return 100;

    return 0;

}

static int bochs_open(BlockDriverState *bs, const char *filename, int flags)

{

    BDRVBochsState *s = bs->opaque;

    int fd, i;

    struct bochs_header bochs;

    struct bochs_header_v1 header_v1;

    fd = open(filename, O_RDWR | O_BINARY);

    if (fd < 0) {

        fd = open(filename, O_RDONLY | O_BINARY);

        if (fd < 0)

            return -1;

    }

    bs->read_only = 1; // no write support yet

    s->fd = fd;

    if (read(fd, &bochs, sizeof(bochs)) != sizeof(bochs)) {

        goto fail;

    }

    if (strcmp(bochs.magic, HEADER_MAGIC) ||

        strcmp(bochs.type, REDOLOG_TYPE) ||

        strcmp(bochs.subtype, GROWING_TYPE) ||

	((le32_to_cpu(bochs.version) != HEADER_VERSION) &&

	(le32_to_cpu(bochs.version) != HEADER_V1))) {

        goto fail;

    }

    if (le32_to_cpu(bochs.version) == HEADER_V1) {

      memcpy(&header_v1, &bochs, sizeof(bochs));

      bs->total_sectors = le64_to_cpu(header_v1.extra.redolog.disk) / 512;

    } else {

      bs->total_sectors = le64_to_cpu(bochs.extra.redolog.disk) / 512;

    }

    lseek(s->fd, le32_to_cpu(bochs.header), SEEK_SET);

    s->catalog_size = le32_to_cpu(bochs.extra.redolog.catalog);

    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]);

    s->data_offset = le32_to_cpu(bochs.header) + (s->catalog_size * 4);

    s->bitmap_blocks = 1 + (le32_to_cpu(bochs.extra.redolog.bitmap) - 1) / 512;

    s->extent_blocks = 1 + (le32_to_cpu(bochs.extra.redolog.extent) - 1) / 512;

    s->extent_size = le32_to_cpu(bochs.extra.redolog.extent);

    return 0;

 fail:

    close(fd);

    return -1;

}

static inline int seek_to_sector(BlockDriverState *bs, int64_t sector_num)

{

    BDRVBochsState *s = bs->opaque;

    int64_t offset = sector_num * 512;

    int64_t extent_index, extent_offset, bitmap_offset, block_offset;

    char bitmap_entry;

    // seek to sector

    extent_index = offset / s->extent_size;

    extent_offset = (offset % s->extent_size) / 512;

    if (s->catalog_bitmap[extent_index] == 0xffffffff)

    {

//	fprintf(stderr, "page not allocated [%x - %x:%x]\n",

//	    sector_num, extent_index, extent_offset);

	return -1; // not allocated

    }

    bitmap_offset = s->data_offset + (512 * s->catalog_bitmap[extent_index] *

	(s->extent_blocks + s->bitmap_blocks));

    block_offset = bitmap_offset + (512 * (s->bitmap_blocks + extent_offset));

//    fprintf(stderr, "sect: %x [ext i: %x o: %x] -> %x bitmap: %x block: %x\n",

//	sector_num, extent_index, extent_offset,

//	le32_to_cpu(s->catalog_bitmap[extent_index]),

//	bitmap_offset, block_offset);

    // read in bitmap for current extent

    lseek(s->fd, bitmap_offset + (extent_offset / 8), SEEK_SET);

    read(s->fd, &bitmap_entry, 1);

    if (!((bitmap_entry >> (extent_offset % 8)) & 1))

    {

//	fprintf(stderr, "sector (%x) in bitmap not allocated\n",

//	    sector_num);

	return -1; // not allocated

    }

    lseek(s->fd, block_offset, SEEK_SET);

    return 0;

}

static int bochs_read(BlockDriverState *bs, int64_t sector_num,

                    uint8_t *buf, int nb_sectors)

{

    BDRVBochsState *s = bs->opaque;

    int ret;

    while (nb_sectors > 0) {

	if (!seek_to_sector(bs, sector_num))

	{

	    ret = read(s->fd, buf, 512);

	    if (ret != 512)

		return -1;

	}

	else

            memset(buf, 0, 512);

        nb_sectors--;

        sector_num++;

        buf += 512;

    }

    return 0;

}

static void bochs_close(BlockDriverState *bs)

{

    BDRVBochsState *s = bs->opaque;

    qemu_free(s->catalog_bitmap);

    close(s->fd);

}

static BlockDriver bdrv_bochs = {

    .format_name	= "bochs",

    .instance_size	= sizeof(BDRVBochsState),

    .bdrv_probe		= bochs_probe,

    .bdrv_open		= bochs_open,

    .bdrv_read		= bochs_read,

    .bdrv_close		= bochs_close,

};

static void bdrv_bochs_init(void)

{

    bdrv_register(&bdrv_bochs);

}

block_init(bdrv_bochs_init);

/*

 * QEMU Block driver for CLOOP images

 *

 * Copyright (c) 2004 Johannes E. Schindelin

 *

 * 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"

#include "module.h"

#include <zlib.h>

typedef struct BDRVCloopState {

    int fd;

    uint32_t block_size;

    uint32_t n_blocks;

    uint64_t* offsets;

    uint32_t sectors_per_block;

    uint32_t current_block;

    uint8_t *compressed_block;

    uint8_t *uncompressed_block;

    z_stream zstream;

} BDRVCloopState;

static int cloop_probe(const uint8_t *buf, int buf_size, const char *filename)

{

    const char* magic_version_2_0="#!/bin/sh\n"

	"#V2.0 Format\n"

	"modprobe cloop file=$0 && mount -r -t iso9660 /dev/cloop $1\n";

    int length=strlen(magic_version_2_0);

    if(length>buf_size)

	length=buf_size;

    if(!memcmp(magic_version_2_0,buf,length))

	return 2;

    return 0;

}

static int cloop_open(BlockDriverState *bs, const char *filename, int flags)

{

    BDRVCloopState *s = bs->opaque;

    uint32_t offsets_size,max_compressed_block_size=1,i;

    s->fd = open(filename, O_RDONLY | O_BINARY);

    if (s->fd < 0)

        return -errno;

    bs->read_only = 1;

    /* read header */

    if(lseek(s->fd,128,SEEK_SET)<0) {

cloop_close:

	close(s->fd);

	return -1;

    }

    if(read(s->fd,&s->block_size,4)<4)

	goto cloop_close;

    s->block_size=be32_to_cpu(s->block_size);

    if(read(s->fd,&s->n_blocks,4)<4)

	goto cloop_close;

    s->n_blocks=be32_to_cpu(s->n_blocks);

    /* read offsets */

    offsets_size=s->n_blocks*sizeof(uint64_t);

    s->offsets=(uint64_t*)qemu_malloc(offsets_size);

    if(read(s->fd,s->offsets,offsets_size)<offsets_size)

	goto cloop_close;

    for(i=0;i<s->n_blocks;i++) {

	s->offsets[i]=be64_to_cpu(s->offsets[i]);

	if(i>0) {

	    uint32_t size=s->offsets[i]-s->offsets[i-1];

	    if(size>max_compressed_block_size)

		max_compressed_block_size=size;

	}

    }

    /* initialize zlib engine */

    s->compressed_block = qemu_malloc(max_compressed_block_size+1);

    s->uncompressed_block = qemu_malloc(s->block_size);

    if(inflateInit(&s->zstream) != Z_OK)

	goto cloop_close;

    s->current_block=s->n_blocks;

    s->sectors_per_block = s->block_size/512;

    bs->total_sectors = s->n_blocks*s->sectors_per_block;

    return 0;

}

static inline int cloop_read_block(BDRVCloopState *s,int block_num)

{

    if(s->current_block != block_num) {

	int ret;

        uint32_t bytes = s->offsets[block_num+1]-s->offsets[block_num];

	lseek(s->fd, s->offsets[block_num], SEEK_SET);

        ret = read(s->fd, s->compressed_block, bytes);

        if (ret != bytes)

            return -1;

	s->zstream.next_in = s->compressed_block;

	s->zstream.avail_in = bytes;

	s->zstream.next_out = s->uncompressed_block;

	s->zstream.avail_out = s->block_size;

	ret = inflateReset(&s->zstream);

	if(ret != Z_OK)

	    return -1;

	ret = inflate(&s->zstream, Z_FINISH);

	if(ret != Z_STREAM_END || s->zstream.total_out != s->block_size)

	    return -1;

	s->current_block = block_num;

    }

    return 0;

}

static int cloop_read(BlockDriverState *bs, int64_t sector_num,

                    uint8_t *buf, int nb_sectors)

{

    BDRVCloopState *s = bs->opaque;

    int i;

    for(i=0;i<nb_sectors;i++) {

	uint32_t sector_offset_in_block=((sector_num+i)%s->sectors_per_block),

	    block_num=(sector_num+i)/s->sectors_per_block;

	if(cloop_read_block(s, block_num) != 0)

	    return -1;

	memcpy(buf+i*512,s->uncompressed_block+sector_offset_in_block*512,512);

    }

    return 0;

}

static void cloop_close(BlockDriverState *bs)

{

    BDRVCloopState *s = bs->opaque;

    close(s->fd);

    if(s->n_blocks>0)

	free(s->offsets);

    free(s->compressed_block);

    free(s->uncompressed_block);

    inflateEnd(&s->zstream);

}

static BlockDriver bdrv_cloop = {

    .format_name	= "cloop",

    .instance_size	= sizeof(BDRVCloopState),

    .bdrv_probe		= cloop_probe,

    .bdrv_open		= cloop_open,

    .bdrv_read		= cloop_read,

    .bdrv_close		= cloop_close,

};

static void bdrv_cloop_init(void)

{

    bdrv_register(&bdrv_cloop);

}

block_init(bdrv_cloop_init);

/*

 * Block driver for the COW format

 *

 * Copyright (c) 2004 Fabrice Bellard

 *

 * 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.

 */

#ifndef _WIN32

#include "qemu-common.h"

#include "block_int.h"

#include "module.h"

#include <sys/mman.h>

/**************************************************************/

/* COW block driver using file system holes */

/* user mode linux compatible COW file */

#define COW_MAGIC 0x4f4f4f4d  /* MOOO */

#define COW_VERSION 2

struct cow_header_v2 {

    uint32_t magic;

    uint32_t version;

    char backing_file[1024];

    int32_t mtime;

    uint64_t size;

    uint32_t sectorsize;

};

typedef struct BDRVCowState {

    int fd;

    uint8_t *cow_bitmap; /* if non NULL, COW mappings are used first */

    uint8_t *cow_bitmap_addr; /* mmap address of cow_bitmap */

    int cow_bitmap_size;

    int64_t cow_sectors_offset;

} BDRVCowState;

static int cow_probe(const uint8_t *buf, int buf_size, const char *filename)

{

    const struct cow_header_v2 *cow_header = (const void *)buf;

    if (buf_size >= sizeof(struct cow_header_v2) &&

        be32_to_cpu(cow_header->magic) == COW_MAGIC &&

        be32_to_cpu(cow_header->version) == COW_VERSION)

        return 100;

    else

        return 0;

}

static int cow_open(BlockDriverState *bs, const char *filename, int flags)

{

    BDRVCowState *s = bs->opaque;

    int fd;

    struct cow_header_v2 cow_header;

    int64_t size;

    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;

    }

    s->fd = fd;

    /* see if it is a cow image */

    if (read(fd, &cow_header, sizeof(cow_header)) != sizeof(cow_header)) {

        goto fail;

    }

    if (be32_to_cpu(cow_header.magic) != COW_MAGIC ||

        be32_to_cpu(cow_header.version) != COW_VERSION) {

        goto fail;

    }

    /* cow image found */

    size = be64_to_cpu(cow_header.size);

    bs->total_sectors = size / 512;

    pstrcpy(bs->backing_file, sizeof(bs->backing_file),

            cow_header.backing_file);

    /* mmap the bitmap */

    s->cow_bitmap_size = ((bs->total_sectors + 7) >> 3) + sizeof(cow_header);

    s->cow_bitmap_addr = (void *)mmap(get_mmap_addr(s->cow_bitmap_size),

                                      s->cow_bitmap_size,

                                      PROT_READ | PROT_WRITE,

                                      MAP_SHARED, s->fd, 0);

    if (s->cow_bitmap_addr == MAP_FAILED)

        goto fail;

    s->cow_bitmap = s->cow_bitmap_addr + sizeof(cow_header);

    s->cow_sectors_offset = (s->cow_bitmap_size + 511) & ~511;

    return 0;

 fail:

    close(fd);

    return -1;

}

static inline void cow_set_bit(uint8_t *bitmap, int64_t bitnum)

{

    bitmap[bitnum / 8] |= (1 << (bitnum%8));

}

static inline int is_bit_set(const uint8_t *bitmap, int64_t bitnum)

{

    return !!(bitmap[bitnum / 8] & (1 << (bitnum%8)));

}

/* Return true if first block has been changed (ie. current version is

 * in COW file).  Set the number of continuous blocks for which that

 * is true. */

static inline int is_changed(uint8_t *bitmap,

                             int64_t sector_num, int nb_sectors,

                             int *num_same)

{

    int changed;

    if (!bitmap || nb_sectors == 0) {

	*num_same = nb_sectors;

	return 0;

    }

    changed = is_bit_set(bitmap, sector_num);

    for (*num_same = 1; *num_same < nb_sectors; (*num_same)++) {

	if (is_bit_set(bitmap, sector_num + *num_same) != changed)

	    break;

    }

    return changed;

}

static int cow_is_allocated(BlockDriverState *bs, int64_t sector_num,

                            int nb_sectors, int *pnum)

{

    BDRVCowState *s = bs->opaque;

    return is_changed(s->cow_bitmap, sector_num, nb_sectors, pnum);

}

static int cow_read(BlockDriverState *bs, int64_t sector_num,

                    uint8_t *buf, int nb_sectors)

{

    BDRVCowState *s = bs->opaque;

    int ret, n;

    while (nb_sectors > 0) {

        if (is_changed(s->cow_bitmap, sector_num, nb_sectors, &n)) {

            lseek(s->fd, s->cow_sectors_offset + sector_num * 512, SEEK_SET);

            ret = read(s->fd, buf, n * 512);

            if (ret != n * 512)

                return -1;

        } else {

            if (bs->backing_hd) {

                /* read from the base image */

                ret = bdrv_read(bs->backing_hd, sector_num, buf, n);

                if (ret < 0)

                    return -1;

            } else {

            memset(buf, 0, n * 512);

        }

        }

        nb_sectors -= n;

        sector_num += n;

        buf += n * 512;

    }

    return 0;

}

static int cow_write(BlockDriverState *bs, int64_t sector_num,

                     const uint8_t *buf, int nb_sectors)

{

    BDRVCowState *s = bs->opaque;

    int ret, i;

    lseek(s->fd, s->cow_sectors_offset + sector_num * 512, SEEK_SET);

    ret = write(s->fd, buf, nb_sectors * 512);

    if (ret != nb_sectors * 512)

        return -1;

    for (i = 0; i < nb_sectors; i++)

        cow_set_bit(s->cow_bitmap, sector_num + i);

    return 0;

}

static void cow_close(BlockDriverState *bs)

{

    BDRVCowState *s = bs->opaque;

    munmap((void *)s->cow_bitmap_addr, s->cow_bitmap_size);

    close(s->fd);

}

static int cow_create(const char *filename, int64_t image_sectors,

                      const char *image_filename, int flags)

{

    int fd, cow_fd;

    struct cow_header_v2 cow_header;

    struct stat st;

    if (flags)

        return -ENOTSUP;

    cow_fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,

              0644);

    if (cow_fd < 0)

        return -1;

    memset(&cow_header, 0, sizeof(cow_header));

    cow_header.magic = cpu_to_be32(COW_MAGIC);

    cow_header.version = cpu_to_be32(COW_VERSION);

    if (image_filename) {

        /* Note: if no file, we put a dummy mtime */

        cow_header.mtime = cpu_to_be32(0);

        fd = open(image_filename, O_RDONLY | O_BINARY);

        if (fd < 0) {

            close(cow_fd);

            goto mtime_fail;

        }

        if (fstat(fd, &st) != 0) {

            close(fd);

            goto mtime_fail;

        }

        close(fd);

        cow_header.mtime = cpu_to_be32(st.st_mtime);

    mtime_fail:

        pstrcpy(cow_header.backing_file, sizeof(cow_header.backing_file),

                image_filename);

    }

    cow_header.sectorsize = cpu_to_be32(512);

    cow_header.size = cpu_to_be64(image_sectors * 512);

    write(cow_fd, &cow_header, sizeof(cow_header));

    /* resize to include at least all the bitmap */

    ftruncate(cow_fd, sizeof(cow_header) + ((image_sectors + 7) >> 3));

    close(cow_fd);

    return 0;

}

static void cow_flush(BlockDriverState *bs)

{

    BDRVCowState *s = bs->opaque;

    fsync(s->fd);

}

static BlockDriver bdrv_cow = {

    .format_name	= "cow",

    .instance_size	= sizeof(BDRVCowState),

    .bdrv_probe		= cow_probe,

    .bdrv_open		= cow_open,

    .bdrv_read		= cow_read,

    .bdrv_write		= cow_write,

    .bdrv_close		= cow_close,

    .bdrv_create	= cow_create,

    .bdrv_flush		= cow_flush,

    .bdrv_is_allocated	= cow_is_allocated,

};

static void bdrv_cow_init(void)

{

    bdrv_register(&bdrv_cow);

}

block_init(bdrv_cow_init);

#endif

/*

 * QEMU Block driver for DMG images

 *

 * Copyright (c) 2004 Johannes E. Schindelin

 *

 * 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"

#include "bswap.h"

#include "module.h"

#include <zlib.h>

typedef struct BDRVDMGState {

    int fd;

    /* each chunk contains a certain number of sectors,

     * offsets[i] is the offset in the .dmg file,

     * lengths[i] is the length of the compressed chunk,

     * sectors[i] is the sector beginning at offsets[i],

     * sectorcounts[i] is the number of sectors in that chunk,

     * the sectors array is ordered

     * 0<=i<n_chunks */

    uint32_t n_chunks;

    uint32_t* types;

    uint64_t* offsets;

    uint64_t* lengths;

    uint64_t* sectors;

    uint64_t* sectorcounts;

    uint32_t current_chunk;

    uint8_t *compressed_chunk;

    uint8_t *uncompressed_chunk;

    z_stream zstream;

} BDRVDMGState;

static int dmg_probe(const uint8_t *buf, int buf_size, const char *filename)

{

    int len=strlen(filename);

    if(len>4 && !strcmp(filename+len-4,".dmg"))

	return 2;

    return 0;

}

static off_t read_off(int fd)

{

	uint64_t buffer;

	if(read(fd,&buffer,8)<8)

		return 0;

	return be64_to_cpu(buffer);

}

static off_t read_uint32(int fd)

{

	uint32_t buffer;

	if(read(fd,&buffer,4)<4)

		return 0;

	return be32_to_cpu(buffer);

}

static int dmg_open(BlockDriverState *bs, const char *filename, int flags)

{

    BDRVDMGState *s = bs->opaque;

    off_t info_begin,info_end,last_in_offset,last_out_offset;

    uint32_t count;

    uint32_t max_compressed_size=1,max_sectors_per_chunk=1,i;

    s->fd = open(filename, O_RDONLY | O_BINARY);

    if (s->fd < 0)

        return -errno;

    bs->read_only = 1;

    s->n_chunks = 0;

    s->offsets = s->lengths = s->sectors = s->sectorcounts = NULL;

    /* read offset of info blocks */

    if(lseek(s->fd,-0x1d8,SEEK_END)<0) {

dmg_close:

	close(s->fd);

	/* open raw instead */

	bs->drv=bdrv_find_format("raw");

	return bs->drv->bdrv_open(bs, filename, flags);

    }

    info_begin=read_off(s->fd);

    if(info_begin==0)

	goto dmg_close;

    if(lseek(s->fd,info_begin,SEEK_SET)<0)

	goto dmg_close;

    if(read_uint32(s->fd)!=0x100)

	goto dmg_close;

    if((count = read_uint32(s->fd))==0)

	goto dmg_close;

    info_end = info_begin+count;

    if(lseek(s->fd,0xf8,SEEK_CUR)<0)

	goto dmg_close;

    /* read offsets */

    last_in_offset = last_out_offset = 0;

    while(lseek(s->fd,0,SEEK_CUR)<info_end) {

        uint32_t type;

	count = read_uint32(s->fd);

	if(count==0)

	    goto dmg_close;

	type = read_uint32(s->fd);

	if(type!=0x6d697368 || count<244)

	    lseek(s->fd,count-4,SEEK_CUR);

	else {

	    int new_size, chunk_count;

	    if(lseek(s->fd,200,SEEK_CUR)<0)

	        goto dmg_close;

	    chunk_count = (count-204)/40;

	    new_size = sizeof(uint64_t) * (s->n_chunks + chunk_count);

	    s->types = qemu_realloc(s->types, new_size/2);

	    s->offsets = qemu_realloc(s->offsets, new_size);

	    s->lengths = qemu_realloc(s->lengths, new_size);

	    s->sectors = qemu_realloc(s->sectors, new_size);

	    s->sectorcounts = qemu_realloc(s->sectorcounts, new_size);

	    for(i=s->n_chunks;i<s->n_chunks+chunk_count;i++) {

		s->types[i] = read_uint32(s->fd);

		if(s->types[i]!=0x80000005 && s->types[i]!=1 && s->types[i]!=2) {

		    if(s->types[i]==0xffffffff) {

			last_in_offset = s->offsets[i-1]+s->lengths[i-1];

			last_out_offset = s->sectors[i-1]+s->sectorcounts[i-1];

		    }

		    chunk_count--;

		    i--;

		    if(lseek(s->fd,36,SEEK_CUR)<0)

			goto dmg_close;

		    continue;

		}

		read_uint32(s->fd);

		s->sectors[i] = last_out_offset+read_off(s->fd);

		s->sectorcounts[i] = read_off(s->fd);

		s->offsets[i] = last_in_offset+read_off(s->fd);

		s->lengths[i] = read_off(s->fd);

		if(s->lengths[i]>max_compressed_size)

		    max_compressed_size = s->lengths[i];

		if(s->sectorcounts[i]>max_sectors_per_chunk)

		    max_sectors_per_chunk = s->sectorcounts[i];

	    }

	    s->n_chunks+=chunk_count;

	}

    }

    /* initialize zlib engine */

    s->compressed_chunk = qemu_malloc(max_compressed_size+1);

    s->uncompressed_chunk = qemu_malloc(512*max_sectors_per_chunk);

    if(inflateInit(&s->zstream) != Z_OK)

	goto dmg_close;

    s->current_chunk = s->n_chunks;

    return 0;

}

static inline int is_sector_in_chunk(BDRVDMGState* s,

		uint32_t chunk_num,int sector_num)

{

    if(chunk_num>=s->n_chunks || s->sectors[chunk_num]>sector_num ||

	    s->sectors[chunk_num]+s->sectorcounts[chunk_num]<=sector_num)

	return 0;

    else

	return -1;

}

static inline uint32_t search_chunk(BDRVDMGState* s,int sector_num)

{

    /* binary search */

    uint32_t chunk1=0,chunk2=s->n_chunks,chunk3;

    while(chunk1!=chunk2) {

	chunk3 = (chunk1+chunk2)/2;

	if(s->sectors[chunk3]>sector_num)

	    chunk2 = chunk3;

	else if(s->sectors[chunk3]+s->sectorcounts[chunk3]>sector_num)

	    return chunk3;

	else

	    chunk1 = chunk3;

    }

    return s->n_chunks; /* error */

}

static inline int dmg_read_chunk(BDRVDMGState *s,int sector_num)

{

    if(!is_sector_in_chunk(s,s->current_chunk,sector_num)) {

	int ret;

	uint32_t chunk = search_chunk(s,sector_num);

	if(chunk>=s->n_chunks)

	    return -1;

	s->current_chunk = s->n_chunks;

	switch(s->types[chunk]) {

	case 0x80000005: { /* zlib compressed */

	    int i;

	    ret = lseek(s->fd, s->offsets[chunk], SEEK_SET);

	    if(ret<0)

		return -1;

	    /* we need to buffer, because only the chunk as whole can be

	     * inflated. */

	    i=0;

	    do {

		ret = read(s->fd, s->compressed_chunk+i, s->lengths[chunk]-i);

		if(ret<0 && errno==EINTR)

		    ret=0;

		i+=ret;

	    } while(ret>=0 && ret+i<s->lengths[chunk]);

	    if (ret != s->lengths[chunk])

		return -1;

	    s->zstream.next_in = s->compressed_chunk;

	    s->zstream.avail_in = s->lengths[chunk];

	    s->zstream.next_out = s->uncompressed_chunk;

	    s->zstream.avail_out = 512*s->sectorcounts[chunk];

	    ret = inflateReset(&s->zstream);

	    if(ret != Z_OK)

		return -1;

	    ret = inflate(&s->zstream, Z_FINISH);

	    if(ret != Z_STREAM_END || s->zstream.total_out != 512*s->sectorcounts[chunk])

		return -1;

	    break; }

	case 1: /* copy */

	    ret = read(s->fd, s->uncompressed_chunk, s->lengths[chunk]);

	    if (ret != s->lengths[chunk])

		return -1;

	    break;

	case 2: /* zero */

	    memset(s->uncompressed_chunk, 0, 512*s->sectorcounts[chunk]);

	    break;

	}

	s->current_chunk = chunk;

    }

    return 0;

}

static int dmg_read(BlockDriverState *bs, int64_t sector_num,

                    uint8_t *buf, int nb_sectors)

{

    BDRVDMGState *s = bs->opaque;

    int i;

    for(i=0;i<nb_sectors;i++) {

	uint32_t sector_offset_in_chunk;

	if(dmg_read_chunk(s, sector_num+i) != 0)

	    return -1;

	sector_offset_in_chunk = sector_num+i-s->sectors[s->current_chunk];

	memcpy(buf+i*512,s->uncompressed_chunk+sector_offset_in_chunk*512,512);

    }

    return 0;

}

static void dmg_close(BlockDriverState *bs)

{

    BDRVDMGState *s = bs->opaque;

    close(s->fd);

    if(s->n_chunks>0) {

	free(s->types);

	free(s->offsets);

	free(s->lengths);

	free(s->sectors);

	free(s->sectorcounts);

    }

    free(s->compressed_chunk);

    free(s->uncompressed_chunk);

    inflateEnd(&s->zstream);

}

static BlockDriver bdrv_dmg = {

    .format_name	= "dmg",

    .instance_size	= sizeof(BDRVDMGState),

    .bdrv_probe		= dmg_probe,

    .bdrv_open		= dmg_open,

    .bdrv_read		= dmg_read,

    .bdrv_close		= dmg_close,

};

static void bdrv_dmg_init(void)

{

    bdrv_register(&bdrv_dmg);

}

block_init(bdrv_dmg_init);

/*

 * QEMU Block driver for  NBD

 *

 * Copyright (C) 2008 Bull S.A.S.

 *     Author: Laurent Vivier <Laurent.Vivier@bull.net>

 *

 * Some parts:

 *    Copyright (C) 2007 Anthony Liguori <anthony@codemonkey.ws>

 *

 * 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 "nbd.h"

#include "module.h"

#include <sys/types.h>

#include <unistd.h>

typedef struct BDRVNBDState {

    int sock;

    off_t size;

    size_t blocksize;

} BDRVNBDState;

static int nbd_open(BlockDriverState *bs, const char* filename, int flags)

{

    BDRVNBDState *s = bs->opaque;

    const char *host;

    const char *unixpath;

    int sock;

    off_t size;

    size_t blocksize;

    int ret;

    if ((flags & BDRV_O_CREAT))

        return -EINVAL;

    if (!strstart(filename, "nbd:", &host))

        return -EINVAL;

    if (strstart(host, "unix:", &unixpath)) {

        if (unixpath[0] != '/')

            return -EINVAL;

        sock = unix_socket_outgoing(unixpath);

    } else {

        uint16_t port;

        char *p, *r;

        char hostname[128];

        pstrcpy(hostname, 128, host);

        p = strchr(hostname, ':');

        if (p == NULL)

            return -EINVAL;

        *p = '\0';

        p++;

        port = strtol(p, &r, 0);

        if (r == p)

            return -EINVAL;

        sock = tcp_socket_outgoing(hostname, port);

    }

    if (sock == -1)

        return -errno;

    ret = nbd_receive_negotiate(sock, &size, &blocksize);

    if (ret == -1)

        return -errno;

    s->sock = sock;

    s->size = size;

    s->blocksize = blocksize;

    return 0;

}

static int nbd_read(BlockDriverState *bs, int64_t sector_num,

                    uint8_t *buf, int nb_sectors)

{

    BDRVNBDState *s = bs->opaque;

    struct nbd_request request;

    struct nbd_reply reply;

    request.type = NBD_CMD_READ;

    request.handle = (uint64_t)(intptr_t)bs;

    request.from = sector_num * 512;;

    request.len = nb_sectors * 512;

    if (nbd_send_request(s->sock, &request) == -1)

        return -errno;

    if (nbd_receive_reply(s->sock, &reply) == -1)

        return -errno;

    if (reply.error !=0)

        return -reply.error;

    if (reply.handle != request.handle)

        return -EIO;

    if (nbd_wr_sync(s->sock, buf, request.len, 1) != request.len)

        return -EIO;

    return 0;

}

static int nbd_write(BlockDriverState *bs, int64_t sector_num,

                     const uint8_t *buf, int nb_sectors)

{

    BDRVNBDState *s = bs->opaque;

    struct nbd_request request;

    struct nbd_reply reply;

    request.type = NBD_CMD_WRITE;

    request.handle = (uint64_t)(intptr_t)bs;

    request.from = sector_num * 512;;

    request.len = nb_sectors * 512;

    if (nbd_send_request(s->sock, &request) == -1)

        return -errno;

    if (nbd_wr_sync(s->sock, (uint8_t*)buf, request.len, 0) != request.len)

        return -EIO;

    if (nbd_receive_reply(s->sock, &reply) == -1)

        return -errno;

    if (reply.error !=0)

        return -reply.error;

    if (reply.handle != request.handle)

        return -EIO;

    return 0;

}

static void nbd_close(BlockDriverState *bs)

{

    BDRVNBDState *s = bs->opaque;

    struct nbd_request request;

    request.type = NBD_CMD_DISC;

    request.handle = (uint64_t)(intptr_t)bs;

    request.from = 0;

    request.len = 0;

    nbd_send_request(s->sock, &request);

    close(s->sock);

}

static int64_t nbd_getlength(BlockDriverState *bs)

{

    BDRVNBDState *s = bs->opaque;

    return s->size;

}

static BlockDriver bdrv_nbd = {

    .format_name	= "nbd",

    .instance_size	= sizeof(BDRVNBDState),

    .bdrv_open		= nbd_open,

    .bdrv_read		= nbd_read,

    .bdrv_write		= nbd_write,

    .bdrv_close		= nbd_close,

    .bdrv_getlength	= nbd_getlength,

    .protocol_name	= "nbd",

};

static void bdrv_nbd_init(void)

{

    bdrv_register(&bdrv_nbd);

}

block_init(bdrv_nbd_init);

/*

 * 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"

#include "module.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);

}

static 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,

};

static void bdrv_parallels_init(void)

{

    bdrv_register(&bdrv_parallels);

}

block_init(bdrv_parallels_init);

/*

 * Block driver for the QCOW format

 *

 * Copyright (c) 2004-2006 Fabrice Bellard

 *

 * 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"