2007-07-31 23:28:53 +00:00
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|
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/*
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* Block driver for Parallels disk image format
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*
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* Copyright (c) 2007 Alex Beregszaszi
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*
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* This code is based on comparing different disk images created by Parallels.
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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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2007-11-11 02:51:17 +00:00
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#include "qemu-common.h"
|
2012-12-17 17:19:44 +00:00
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#include "block/block_int.h"
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2012-12-17 17:20:00 +00:00
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|
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#include "qemu/module.h"
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2007-07-31 23:28:53 +00:00
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/**************************************************************/
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#define HEADER_MAGIC "WithoutFreeSpace"
|
2014-07-28 16:23:55 +00:00
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#define HEADER_MAGIC2 "WithouFreSpacExt"
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2007-07-31 23:28:53 +00:00
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#define HEADER_VERSION 2
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// always little-endian
|
2015-04-28 07:46:35 +00:00
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|
|
typedef struct ParallelsHeader {
|
2007-07-31 23:28:53 +00:00
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|
|
char magic[16]; // "WithoutFreeSpace"
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|
|
uint32_t version;
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|
|
uint32_t heads;
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|
|
uint32_t cylinders;
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|
|
uint32_t tracks;
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|
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uint32_t catalog_entries;
|
2014-07-28 16:23:52 +00:00
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|
uint64_t nb_sectors;
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|
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uint32_t inuse;
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uint32_t data_off;
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char padding[12];
|
2015-04-28 07:46:35 +00:00
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|
|
} QEMU_PACKED ParallelsHeader;
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2007-07-31 23:28:53 +00:00
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typedef struct BDRVParallelsState {
|
2015-04-28 07:46:39 +00:00
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|
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/** Locking is conservative, the lock protects
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* - image file extending (truncate, fallocate)
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* - any access to block allocation table
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*/
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2011-10-20 11:16:21 +00:00
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|
CoMutex lock;
|
2007-07-31 23:28:53 +00:00
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uint32_t *catalog_bitmap;
|
2014-03-26 12:06:08 +00:00
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unsigned int catalog_size;
|
2007-07-31 23:28:53 +00:00
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|
2014-03-26 12:06:09 +00:00
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unsigned int tracks;
|
2014-07-28 16:23:55 +00:00
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unsigned int off_multiplier;
|
2015-04-28 07:46:42 +00:00
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bool has_truncate;
|
2007-07-31 23:28:53 +00:00
|
|
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} BDRVParallelsState;
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static int parallels_probe(const uint8_t *buf, int buf_size, const char *filename)
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|
|
{
|
2015-04-28 07:46:35 +00:00
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|
|
const ParallelsHeader *ph = (const void *)buf;
|
2007-07-31 23:28:53 +00:00
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|
2015-04-28 07:46:40 +00:00
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|
|
if (buf_size < sizeof(ParallelsHeader))
|
2014-07-28 16:23:53 +00:00
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return 0;
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2007-07-31 23:28:53 +00:00
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|
2014-07-28 16:23:55 +00:00
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|
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if ((!memcmp(ph->magic, HEADER_MAGIC, 16) ||
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!memcmp(ph->magic, HEADER_MAGIC2, 16)) &&
|
2014-07-28 16:23:53 +00:00
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|
(le32_to_cpu(ph->version) == HEADER_VERSION))
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|
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return 100;
|
2007-07-31 23:28:53 +00:00
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return 0;
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|
|
|
}
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|
2013-09-05 12:22:29 +00:00
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|
|
static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
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|
|
Error **errp)
|
2007-07-31 23:28:53 +00:00
|
|
|
{
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|
|
|
BDRVParallelsState *s = bs->opaque;
|
2010-05-06 20:04:50 +00:00
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|
|
int i;
|
2015-04-28 07:46:35 +00:00
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|
|
ParallelsHeader ph;
|
2013-01-25 16:07:32 +00:00
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|
|
int ret;
|
2007-07-31 23:28:53 +00:00
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|
2013-01-25 16:07:32 +00:00
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|
ret = bdrv_pread(bs->file, 0, &ph, sizeof(ph));
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|
|
|
if (ret < 0) {
|
2007-07-31 23:28:53 +00:00
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|
goto fail;
|
2013-01-25 16:07:32 +00:00
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|
|
}
|
2007-07-31 23:28:53 +00:00
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|
|
2014-07-28 16:23:55 +00:00
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|
|
bs->total_sectors = le64_to_cpu(ph.nb_sectors);
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|
2014-07-28 16:23:54 +00:00
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|
|
if (le32_to_cpu(ph.version) != HEADER_VERSION) {
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|
goto fail_format;
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|
|
|
}
|
2014-07-28 16:23:55 +00:00
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|
|
if (!memcmp(ph.magic, HEADER_MAGIC, 16)) {
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s->off_multiplier = 1;
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bs->total_sectors = 0xffffffff & bs->total_sectors;
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|
|
} else if (!memcmp(ph.magic, HEADER_MAGIC2, 16)) {
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s->off_multiplier = le32_to_cpu(ph.tracks);
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} else {
|
2014-07-28 16:23:54 +00:00
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goto fail_format;
|
2007-07-31 23:28:53 +00:00
|
|
|
}
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s->tracks = le32_to_cpu(ph.tracks);
|
2014-03-26 12:06:09 +00:00
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if (s->tracks == 0) {
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error_setg(errp, "Invalid image: Zero sectors per track");
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ret = -EINVAL;
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goto fail;
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}
|
2014-07-28 16:23:55 +00:00
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if (s->tracks > INT32_MAX/513) {
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error_setg(errp, "Invalid image: Too big cluster");
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ret = -EFBIG;
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goto fail;
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|
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|
}
|
2007-07-31 23:28:53 +00:00
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s->catalog_size = le32_to_cpu(ph.catalog_entries);
|
2015-04-28 07:46:40 +00:00
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if (s->catalog_size > INT_MAX / sizeof(uint32_t)) {
|
2014-03-26 12:06:08 +00:00
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error_setg(errp, "Catalog too large");
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ret = -EFBIG;
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goto fail;
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|
}
|
2014-08-19 08:31:09 +00:00
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s->catalog_bitmap = g_try_new(uint32_t, s->catalog_size);
|
2014-05-20 11:32:14 +00:00
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if (s->catalog_size && s->catalog_bitmap == NULL) {
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ret = -ENOMEM;
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goto fail;
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}
|
2013-01-25 16:07:32 +00:00
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|
2015-04-28 07:46:40 +00:00
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ret = bdrv_pread(bs->file, sizeof(ParallelsHeader),
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s->catalog_bitmap, s->catalog_size * sizeof(uint32_t));
|
2013-01-25 16:07:32 +00:00
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if (ret < 0) {
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goto fail;
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}
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|
2007-07-31 23:28:53 +00:00
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for (i = 0; i < s->catalog_size; i++)
|
2014-07-28 16:23:53 +00:00
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le32_to_cpus(&s->catalog_bitmap[i]);
|
2007-07-31 23:28:53 +00:00
|
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|
2015-04-28 07:46:42 +00:00
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s->has_truncate = bdrv_has_zero_init(bs->file) &&
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bdrv_truncate(bs->file, bdrv_getlength(bs->file)) == 0;
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|
|
2011-10-20 11:16:21 +00:00
|
|
|
qemu_co_mutex_init(&s->lock);
|
2007-07-31 23:28:53 +00:00
|
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|
return 0;
|
2013-01-25 16:07:32 +00:00
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|
2014-07-28 16:23:54 +00:00
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fail_format:
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error_setg(errp, "Image not in Parallels format");
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ret = -EINVAL;
|
2007-07-31 23:28:53 +00:00
|
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|
fail:
|
2013-01-25 16:07:32 +00:00
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g_free(s->catalog_bitmap);
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|
|
|
return ret;
|
2007-07-31 23:28:53 +00:00
|
|
|
}
|
|
|
|
|
2015-04-28 07:46:36 +00:00
|
|
|
static int64_t seek_to_sector(BDRVParallelsState *s, int64_t sector_num)
|
2007-07-31 23:28:53 +00:00
|
|
|
{
|
2009-11-07 14:10:01 +00:00
|
|
|
uint32_t index, offset;
|
2007-07-31 23:28:53 +00:00
|
|
|
|
|
|
|
index = sector_num / s->tracks;
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|
|
|
offset = sector_num % s->tracks;
|
|
|
|
|
2010-05-06 20:04:34 +00:00
|
|
|
/* not allocated */
|
2014-10-08 09:13:30 +00:00
|
|
|
if ((index >= s->catalog_size) || (s->catalog_bitmap[index] == 0))
|
2014-07-28 16:23:53 +00:00
|
|
|
return -1;
|
2015-04-28 07:46:36 +00:00
|
|
|
return (uint64_t)s->catalog_bitmap[index] * s->off_multiplier + offset;
|
2007-07-31 23:28:53 +00:00
|
|
|
}
|
|
|
|
|
2015-04-28 07:46:37 +00:00
|
|
|
static int cluster_remainder(BDRVParallelsState *s, int64_t sector_num,
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|
|
|
int nb_sectors)
|
|
|
|
{
|
|
|
|
int ret = s->tracks - sector_num % s->tracks;
|
|
|
|
return MIN(nb_sectors, ret);
|
|
|
|
}
|
|
|
|
|
2015-04-28 07:46:42 +00:00
|
|
|
static int64_t allocate_cluster(BlockDriverState *bs, int64_t sector_num)
|
|
|
|
{
|
|
|
|
BDRVParallelsState *s = bs->opaque;
|
|
|
|
uint32_t idx, offset, tmp;
|
|
|
|
int64_t pos;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
idx = sector_num / s->tracks;
|
|
|
|
offset = sector_num % s->tracks;
|
|
|
|
|
|
|
|
if (idx >= s->catalog_size) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (s->catalog_bitmap[idx] != 0) {
|
|
|
|
return (uint64_t)s->catalog_bitmap[idx] * s->off_multiplier + offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
pos = bdrv_getlength(bs->file) >> BDRV_SECTOR_BITS;
|
|
|
|
if (s->has_truncate) {
|
|
|
|
ret = bdrv_truncate(bs->file, (pos + s->tracks) << BDRV_SECTOR_BITS);
|
|
|
|
} else {
|
|
|
|
ret = bdrv_write_zeroes(bs->file, pos, s->tracks, 0);
|
|
|
|
}
|
|
|
|
if (ret < 0) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
s->catalog_bitmap[idx] = pos / s->off_multiplier;
|
|
|
|
|
|
|
|
tmp = cpu_to_le32(s->catalog_bitmap[idx]);
|
|
|
|
|
|
|
|
ret = bdrv_pwrite(bs->file,
|
|
|
|
sizeof(ParallelsHeader) + idx * sizeof(tmp), &tmp, sizeof(tmp));
|
|
|
|
if (ret < 0) {
|
|
|
|
s->catalog_bitmap[idx] = 0;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
return (uint64_t)s->catalog_bitmap[idx] * s->off_multiplier + offset;
|
|
|
|
}
|
|
|
|
|
2015-04-28 07:46:38 +00:00
|
|
|
static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs,
|
|
|
|
int64_t sector_num, int nb_sectors, int *pnum)
|
|
|
|
{
|
|
|
|
BDRVParallelsState *s = bs->opaque;
|
|
|
|
int64_t offset;
|
|
|
|
|
|
|
|
qemu_co_mutex_lock(&s->lock);
|
|
|
|
offset = seek_to_sector(s, sector_num);
|
|
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
|
|
|
|
|
|
*pnum = cluster_remainder(s, sector_num, nb_sectors);
|
|
|
|
|
|
|
|
if (offset < 0) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return (offset << BDRV_SECTOR_BITS) |
|
|
|
|
BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
|
|
|
|
}
|
|
|
|
|
2015-04-28 07:46:42 +00:00
|
|
|
static coroutine_fn int parallels_co_writev(BlockDriverState *bs,
|
|
|
|
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
|
|
|
|
{
|
|
|
|
BDRVParallelsState *s = bs->opaque;
|
|
|
|
uint64_t bytes_done = 0;
|
|
|
|
QEMUIOVector hd_qiov;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
qemu_iovec_init(&hd_qiov, qiov->niov);
|
|
|
|
|
|
|
|
while (nb_sectors > 0) {
|
|
|
|
int64_t position;
|
|
|
|
int n, nbytes;
|
|
|
|
|
|
|
|
qemu_co_mutex_lock(&s->lock);
|
|
|
|
position = allocate_cluster(bs, sector_num);
|
|
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
|
|
if (position < 0) {
|
|
|
|
ret = (int)position;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
n = cluster_remainder(s, sector_num, nb_sectors);
|
|
|
|
nbytes = n << BDRV_SECTOR_BITS;
|
|
|
|
|
|
|
|
qemu_iovec_reset(&hd_qiov);
|
|
|
|
qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes);
|
|
|
|
|
|
|
|
ret = bdrv_co_writev(bs->file, position, n, &hd_qiov);
|
|
|
|
if (ret < 0) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
nb_sectors -= n;
|
|
|
|
sector_num += n;
|
|
|
|
bytes_done += nbytes;
|
|
|
|
}
|
|
|
|
|
|
|
|
qemu_iovec_destroy(&hd_qiov);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2015-04-28 07:46:39 +00:00
|
|
|
static coroutine_fn int parallels_co_readv(BlockDriverState *bs,
|
|
|
|
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
|
2007-07-31 23:28:53 +00:00
|
|
|
{
|
2015-04-28 07:46:36 +00:00
|
|
|
BDRVParallelsState *s = bs->opaque;
|
2015-04-28 07:46:39 +00:00
|
|
|
uint64_t bytes_done = 0;
|
|
|
|
QEMUIOVector hd_qiov;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
qemu_iovec_init(&hd_qiov, qiov->niov);
|
2015-04-28 07:46:36 +00:00
|
|
|
|
2007-07-31 23:28:53 +00:00
|
|
|
while (nb_sectors > 0) {
|
2015-04-28 07:46:39 +00:00
|
|
|
int64_t position;
|
|
|
|
int n, nbytes;
|
|
|
|
|
|
|
|
qemu_co_mutex_lock(&s->lock);
|
|
|
|
position = seek_to_sector(s, sector_num);
|
|
|
|
qemu_co_mutex_unlock(&s->lock);
|
|
|
|
|
|
|
|
n = cluster_remainder(s, sector_num, nb_sectors);
|
|
|
|
nbytes = n << BDRV_SECTOR_BITS;
|
|
|
|
|
|
|
|
if (position < 0) {
|
|
|
|
qemu_iovec_memset(qiov, bytes_done, 0, nbytes);
|
|
|
|
} else {
|
|
|
|
qemu_iovec_reset(&hd_qiov);
|
|
|
|
qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes);
|
|
|
|
|
|
|
|
ret = bdrv_co_readv(bs->file, position, n, &hd_qiov);
|
2015-04-28 07:46:36 +00:00
|
|
|
if (ret < 0) {
|
2015-04-28 07:46:39 +00:00
|
|
|
break;
|
2015-04-28 07:46:36 +00:00
|
|
|
}
|
2010-05-06 20:04:34 +00:00
|
|
|
}
|
2015-04-28 07:46:39 +00:00
|
|
|
|
2015-04-28 07:46:37 +00:00
|
|
|
nb_sectors -= n;
|
|
|
|
sector_num += n;
|
2015-04-28 07:46:39 +00:00
|
|
|
bytes_done += nbytes;
|
2007-07-31 23:28:53 +00:00
|
|
|
}
|
|
|
|
|
2015-04-28 07:46:39 +00:00
|
|
|
qemu_iovec_destroy(&hd_qiov);
|
2011-10-20 11:16:22 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2007-07-31 23:28:53 +00:00
|
|
|
static void parallels_close(BlockDriverState *bs)
|
|
|
|
{
|
|
|
|
BDRVParallelsState *s = bs->opaque;
|
2011-08-21 03:09:37 +00:00
|
|
|
g_free(s->catalog_bitmap);
|
2007-07-31 23:28:53 +00:00
|
|
|
}
|
|
|
|
|
2009-05-09 22:03:42 +00:00
|
|
|
static BlockDriver bdrv_parallels = {
|
2009-03-07 22:00:29 +00:00
|
|
|
.format_name = "parallels",
|
|
|
|
.instance_size = sizeof(BDRVParallelsState),
|
|
|
|
.bdrv_probe = parallels_probe,
|
2010-05-06 20:04:50 +00:00
|
|
|
.bdrv_open = parallels_open,
|
2009-03-07 22:00:29 +00:00
|
|
|
.bdrv_close = parallels_close,
|
2015-04-28 07:46:38 +00:00
|
|
|
.bdrv_co_get_block_status = parallels_co_get_block_status,
|
2015-04-28 07:46:41 +00:00
|
|
|
.bdrv_has_zero_init = bdrv_has_zero_init_1,
|
2015-04-28 07:46:39 +00:00
|
|
|
.bdrv_co_readv = parallels_co_readv,
|
2015-04-28 07:46:42 +00:00
|
|
|
.bdrv_co_writev = parallels_co_writev,
|
2007-07-31 23:28:53 +00:00
|
|
|
};
|
2009-05-09 22:03:42 +00:00
|
|
|
|
|
|
|
static void bdrv_parallels_init(void)
|
|
|
|
{
|
|
|
|
bdrv_register(&bdrv_parallels);
|
|
|
|
}
|
|
|
|
|
|
|
|
block_init(bdrv_parallels_init);
|