2005-04-26 23:34:00 +02:00
|
|
|
/*
|
|
|
|
* Block driver for the various disk image formats used by Bochs
|
|
|
|
* Currently only for "growing" type in read-only mode
|
2007-09-16 23:08:06 +02:00
|
|
|
*
|
2005-04-26 23:34:00 +02:00
|
|
|
* Copyright (c) 2005 Alex Beregszaszi
|
2007-09-16 23:08:06 +02:00
|
|
|
*
|
2005-04-26 23:34:00 +02:00
|
|
|
* 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.
|
|
|
|
*/
|
2016-01-18 19:01:42 +01:00
|
|
|
#include "qemu/osdep.h"
|
include/qemu/osdep.h: Don't include qapi/error.h
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the
Error typedef. Since then, we've moved to include qemu/osdep.h
everywhere. Its file comment explains: "To avoid getting into
possible circular include dependencies, this file should not include
any other QEMU headers, with the exceptions of config-host.h,
compiler.h, os-posix.h and os-win32.h, all of which are doing a
similar job to this file and are under similar constraints."
qapi/error.h doesn't do a similar job, and it doesn't adhere to
similar constraints: it includes qapi-types.h. That's in excess of
100KiB of crap most .c files don't actually need.
Add the typedef to qemu/typedefs.h, and include that instead of
qapi/error.h. Include qapi/error.h in .c files that need it and don't
get it now. Include qapi-types.h in qom/object.h for uint16List.
Update scripts/clean-includes accordingly. Update it further to match
reality: replace config.h by config-target.h, add sysemu/os-posix.h,
sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h
comment quoted above similarly.
This reduces the number of objects depending on qapi/error.h from "all
of them" to less than a third. Unfortunately, the number depending on
qapi-types.h shrinks only a little. More work is needed for that one.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
[Fix compilation without the spice devel packages. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-14 09:01:28 +01:00
|
|
|
#include "qapi/error.h"
|
2012-12-17 18:19:44 +01:00
|
|
|
#include "block/block_int.h"
|
2012-12-17 18:20:00 +01:00
|
|
|
#include "qemu/module.h"
|
2016-03-15 17:22:36 +01:00
|
|
|
#include "qemu/bswap.h"
|
2017-11-07 18:21:41 +01:00
|
|
|
#include "qemu/error-report.h"
|
2005-04-26 23:34:00 +02:00
|
|
|
|
|
|
|
/**************************************************************/
|
|
|
|
|
|
|
|
#define HEADER_MAGIC "Bochs Virtual HD Image"
|
2007-01-05 19:56:04 +01:00
|
|
|
#define HEADER_VERSION 0x00020000
|
|
|
|
#define HEADER_V1 0x00010000
|
2005-04-26 23:34:00 +02:00
|
|
|
#define HEADER_SIZE 512
|
|
|
|
|
|
|
|
#define REDOLOG_TYPE "Redolog"
|
|
|
|
#define GROWING_TYPE "Growing"
|
|
|
|
|
|
|
|
// not allocated: 0xffffffff
|
|
|
|
|
2007-01-05 19:56:04 +01:00
|
|
|
// always little-endian
|
|
|
|
struct bochs_header {
|
2014-03-26 13:05:31 +01:00
|
|
|
char magic[32]; /* "Bochs Virtual HD Image" */
|
|
|
|
char type[16]; /* "Redolog" */
|
|
|
|
char subtype[16]; /* "Undoable" / "Volatile" / "Growing" */
|
2007-01-05 19:56:04 +01:00
|
|
|
uint32_t version;
|
2014-03-26 13:05:31 +01:00
|
|
|
uint32_t header; /* size of header */
|
|
|
|
|
|
|
|
uint32_t catalog; /* num of entries */
|
|
|
|
uint32_t bitmap; /* bitmap size */
|
|
|
|
uint32_t extent; /* extent size */
|
2007-09-17 10:09:54 +02:00
|
|
|
|
2007-01-05 19:56:04 +01:00
|
|
|
union {
|
2014-03-26 13:05:31 +01:00
|
|
|
struct {
|
|
|
|
uint32_t reserved; /* for ??? */
|
|
|
|
uint64_t disk; /* disk size */
|
|
|
|
char padding[HEADER_SIZE - 64 - 20 - 12];
|
|
|
|
} QEMU_PACKED redolog;
|
|
|
|
struct {
|
|
|
|
uint64_t disk; /* disk size */
|
|
|
|
char padding[HEADER_SIZE - 64 - 20 - 8];
|
|
|
|
} QEMU_PACKED redolog_v1;
|
|
|
|
char padding[HEADER_SIZE - 64 - 20];
|
2007-01-05 19:56:04 +01:00
|
|
|
} extra;
|
2014-03-26 13:05:31 +01:00
|
|
|
} QEMU_PACKED;
|
2007-01-05 19:56:04 +01:00
|
|
|
|
2005-04-26 23:34:00 +02:00
|
|
|
typedef struct BDRVBochsState {
|
2011-10-20 13:16:21 +02:00
|
|
|
CoMutex lock;
|
2005-04-26 23:34:00 +02:00
|
|
|
uint32_t *catalog_bitmap;
|
2014-03-26 13:05:32 +01:00
|
|
|
uint32_t catalog_size;
|
2007-09-17 10:09:54 +02:00
|
|
|
|
2014-03-26 13:05:32 +01:00
|
|
|
uint32_t data_offset;
|
2007-09-17 10:09:54 +02:00
|
|
|
|
2014-03-26 13:05:32 +01:00
|
|
|
uint32_t bitmap_blocks;
|
|
|
|
uint32_t extent_blocks;
|
|
|
|
uint32_t extent_size;
|
2005-04-26 23:34:00 +02:00
|
|
|
} BDRVBochsState;
|
|
|
|
|
|
|
|
static int bochs_probe(const uint8_t *buf, int buf_size, const char *filename)
|
|
|
|
{
|
|
|
|
const struct bochs_header *bochs = (const void *)buf;
|
2007-09-17 10:09:54 +02:00
|
|
|
|
2005-04-26 23:34:00 +02:00
|
|
|
if (buf_size < HEADER_SIZE)
|
2018-12-13 23:37:37 +01:00
|
|
|
return 0;
|
2005-04-26 23:34:00 +02:00
|
|
|
|
|
|
|
if (!strcmp(bochs->magic, HEADER_MAGIC) &&
|
2018-12-13 23:37:37 +01:00
|
|
|
!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;
|
2005-04-26 23:34:00 +02:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-09-05 14:22:29 +02:00
|
|
|
static int bochs_open(BlockDriverState *bs, QDict *options, int flags,
|
|
|
|
Error **errp)
|
2005-04-26 23:34:00 +02:00
|
|
|
{
|
|
|
|
BDRVBochsState *s = bs->opaque;
|
2014-03-26 13:05:32 +01:00
|
|
|
uint32_t i;
|
2005-04-26 23:34:00 +02:00
|
|
|
struct bochs_header bochs;
|
2013-01-25 17:07:27 +01:00
|
|
|
int ret;
|
2005-04-26 23:34:00 +02:00
|
|
|
|
2018-10-12 11:27:41 +02:00
|
|
|
/* No write support yet */
|
|
|
|
ret = bdrv_apply_auto_read_only(bs, NULL, errp);
|
|
|
|
if (ret < 0) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2016-12-16 18:52:37 +01:00
|
|
|
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
|
|
|
|
false, errp);
|
|
|
|
if (!bs->file) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2016-06-20 18:24:02 +02:00
|
|
|
ret = bdrv_pread(bs->file, 0, &bochs, sizeof(bochs));
|
2013-01-25 17:07:27 +01:00
|
|
|
if (ret < 0) {
|
|
|
|
return ret;
|
2005-04-26 23:34:00 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (strcmp(bochs.magic, HEADER_MAGIC) ||
|
|
|
|
strcmp(bochs.type, REDOLOG_TYPE) ||
|
|
|
|
strcmp(bochs.subtype, GROWING_TYPE) ||
|
2018-12-13 23:37:37 +01:00
|
|
|
((le32_to_cpu(bochs.version) != HEADER_VERSION) &&
|
|
|
|
(le32_to_cpu(bochs.version) != HEADER_V1))) {
|
2014-02-17 14:44:06 +01:00
|
|
|
error_setg(errp, "Image not in Bochs format");
|
|
|
|
return -EINVAL;
|
2005-04-26 23:34:00 +02:00
|
|
|
}
|
|
|
|
|
2007-01-05 19:56:04 +01:00
|
|
|
if (le32_to_cpu(bochs.version) == HEADER_V1) {
|
2014-03-26 13:05:31 +01:00
|
|
|
bs->total_sectors = le64_to_cpu(bochs.extra.redolog_v1.disk) / 512;
|
2007-01-05 19:56:04 +01:00
|
|
|
} else {
|
2014-03-26 13:05:31 +01:00
|
|
|
bs->total_sectors = le64_to_cpu(bochs.extra.redolog.disk) / 512;
|
2007-01-05 19:56:04 +01:00
|
|
|
}
|
2005-04-26 23:34:00 +02:00
|
|
|
|
2014-03-26 13:05:33 +01:00
|
|
|
/* Limit to 1M entries to avoid unbounded allocation. This is what is
|
|
|
|
* needed for the largest image that bximage can create (~8 TB). */
|
2014-03-26 13:05:31 +01:00
|
|
|
s->catalog_size = le32_to_cpu(bochs.catalog);
|
2014-03-26 13:05:33 +01:00
|
|
|
if (s->catalog_size > 0x100000) {
|
|
|
|
error_setg(errp, "Catalog size is too large");
|
|
|
|
return -EFBIG;
|
|
|
|
}
|
|
|
|
|
2014-08-19 10:31:09 +02:00
|
|
|
s->catalog_bitmap = g_try_new(uint32_t, s->catalog_size);
|
2014-05-20 13:21:26 +02:00
|
|
|
if (s->catalog_size && s->catalog_bitmap == NULL) {
|
|
|
|
error_setg(errp, "Could not allocate memory for catalog");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
2013-01-25 17:07:27 +01:00
|
|
|
|
2016-06-20 18:24:02 +02:00
|
|
|
ret = bdrv_pread(bs->file, le32_to_cpu(bochs.header), s->catalog_bitmap,
|
2013-01-25 17:07:27 +01:00
|
|
|
s->catalog_size * 4);
|
|
|
|
if (ret < 0) {
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
2005-04-26 23:34:00 +02:00
|
|
|
for (i = 0; i < s->catalog_size; i++)
|
2018-12-13 23:37:37 +01:00
|
|
|
le32_to_cpus(&s->catalog_bitmap[i]);
|
2005-04-26 23:34:00 +02:00
|
|
|
|
|
|
|
s->data_offset = le32_to_cpu(bochs.header) + (s->catalog_size * 4);
|
|
|
|
|
2014-03-26 13:05:31 +01:00
|
|
|
s->bitmap_blocks = 1 + (le32_to_cpu(bochs.bitmap) - 1) / 512;
|
|
|
|
s->extent_blocks = 1 + (le32_to_cpu(bochs.extent) - 1) / 512;
|
2007-09-17 10:09:54 +02:00
|
|
|
|
2014-03-26 13:05:31 +01:00
|
|
|
s->extent_size = le32_to_cpu(bochs.extent);
|
2014-04-09 12:10:34 +02:00
|
|
|
if (s->extent_size < BDRV_SECTOR_SIZE) {
|
|
|
|
/* bximage actually never creates extents smaller than 4k */
|
|
|
|
error_setg(errp, "Extent size must be at least 512");
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto fail;
|
|
|
|
} else if (!is_power_of_2(s->extent_size)) {
|
|
|
|
error_setg(errp, "Extent size %" PRIu32 " is not a power of two",
|
|
|
|
s->extent_size);
|
2014-04-09 11:19:04 +02:00
|
|
|
ret = -EINVAL;
|
|
|
|
goto fail;
|
2014-03-26 13:05:34 +01:00
|
|
|
} else if (s->extent_size > 0x800000) {
|
|
|
|
error_setg(errp, "Extent size %" PRIu32 " is too large",
|
|
|
|
s->extent_size);
|
2014-04-09 11:19:04 +02:00
|
|
|
ret = -EINVAL;
|
|
|
|
goto fail;
|
2014-03-26 13:05:34 +01:00
|
|
|
}
|
2005-04-26 23:34:00 +02:00
|
|
|
|
2014-04-09 12:10:34 +02:00
|
|
|
if (s->catalog_size < DIV_ROUND_UP(bs->total_sectors,
|
|
|
|
s->extent_size / BDRV_SECTOR_SIZE))
|
|
|
|
{
|
2014-03-26 13:05:33 +01:00
|
|
|
error_setg(errp, "Catalog size is too small for this disk size");
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
2011-10-20 13:16:21 +02:00
|
|
|
qemu_co_mutex_init(&s->lock);
|
2005-04-26 23:34:00 +02:00
|
|
|
return 0;
|
2013-01-25 17:07:27 +01:00
|
|
|
|
|
|
|
fail:
|
|
|
|
g_free(s->catalog_bitmap);
|
|
|
|
return ret;
|
2005-04-26 23:34:00 +02:00
|
|
|
}
|
|
|
|
|
2016-06-24 00:37:17 +02:00
|
|
|
static void bochs_refresh_limits(BlockDriverState *bs, Error **errp)
|
|
|
|
{
|
2016-06-24 00:37:24 +02:00
|
|
|
bs->bl.request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O */
|
2016-06-24 00:37:17 +02:00
|
|
|
}
|
|
|
|
|
2010-05-04 12:44:08 +02:00
|
|
|
static int64_t seek_to_sector(BlockDriverState *bs, int64_t sector_num)
|
2005-04-26 23:34:00 +02:00
|
|
|
{
|
|
|
|
BDRVBochsState *s = bs->opaque;
|
2014-03-26 13:05:32 +01:00
|
|
|
uint64_t offset = sector_num * 512;
|
|
|
|
uint64_t extent_index, extent_offset, bitmap_offset;
|
2005-04-26 23:34:00 +02:00
|
|
|
char bitmap_entry;
|
2014-04-29 19:03:15 +02:00
|
|
|
int ret;
|
2005-04-26 23:34:00 +02:00
|
|
|
|
|
|
|
// seek to sector
|
|
|
|
extent_index = offset / s->extent_size;
|
|
|
|
extent_offset = (offset % s->extent_size) / 512;
|
2007-09-17 10:09:54 +02:00
|
|
|
|
2010-05-04 12:44:08 +02:00
|
|
|
if (s->catalog_bitmap[extent_index] == 0xffffffff) {
|
2018-12-13 23:37:37 +01:00
|
|
|
return 0; /* not allocated */
|
2005-04-26 23:34:00 +02:00
|
|
|
}
|
|
|
|
|
2014-03-26 13:05:35 +01:00
|
|
|
bitmap_offset = s->data_offset +
|
|
|
|
(512 * (uint64_t) s->catalog_bitmap[extent_index] *
|
|
|
|
(s->extent_blocks + s->bitmap_blocks));
|
2007-09-17 10:09:54 +02:00
|
|
|
|
2010-05-04 12:44:08 +02:00
|
|
|
/* read in bitmap for current extent */
|
2016-06-20 18:24:02 +02:00
|
|
|
ret = bdrv_pread(bs->file, bitmap_offset + (extent_offset / 8),
|
2014-04-29 19:03:15 +02:00
|
|
|
&bitmap_entry, 1);
|
|
|
|
if (ret < 0) {
|
|
|
|
return ret;
|
2005-04-26 23:34:00 +02:00
|
|
|
}
|
|
|
|
|
2010-05-04 12:44:08 +02:00
|
|
|
if (!((bitmap_entry >> (extent_offset % 8)) & 1)) {
|
2018-12-13 23:37:37 +01:00
|
|
|
return 0; /* not allocated */
|
2009-12-25 20:27:18 +01:00
|
|
|
}
|
2007-09-17 10:09:54 +02:00
|
|
|
|
2010-05-04 12:44:08 +02:00
|
|
|
return bitmap_offset + (512 * (s->bitmap_blocks + extent_offset));
|
2005-04-26 23:34:00 +02:00
|
|
|
}
|
|
|
|
|
2016-04-25 14:53:22 +02:00
|
|
|
static int coroutine_fn
|
|
|
|
bochs_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
|
|
|
|
QEMUIOVector *qiov, int flags)
|
2005-04-26 23:34:00 +02:00
|
|
|
{
|
2016-04-25 14:53:22 +02:00
|
|
|
BDRVBochsState *s = bs->opaque;
|
|
|
|
uint64_t sector_num = offset >> BDRV_SECTOR_BITS;
|
|
|
|
int nb_sectors = bytes >> BDRV_SECTOR_BITS;
|
|
|
|
uint64_t bytes_done = 0;
|
|
|
|
QEMUIOVector local_qiov;
|
2005-04-26 23:34:00 +02:00
|
|
|
int ret;
|
|
|
|
|
2019-08-27 20:59:12 +02:00
|
|
|
assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
|
|
|
|
assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
|
2016-04-25 14:53:22 +02:00
|
|
|
|
|
|
|
qemu_iovec_init(&local_qiov, qiov->niov);
|
|
|
|
qemu_co_mutex_lock(&s->lock);
|
|
|
|
|
2005-04-26 23:34:00 +02:00
|
|
|
while (nb_sectors > 0) {
|
2010-05-04 12:44:08 +02:00
|
|
|
int64_t block_offset = seek_to_sector(bs, sector_num);
|
2014-04-29 19:03:15 +02:00
|
|
|
if (block_offset < 0) {
|
2016-04-25 14:53:22 +02:00
|
|
|
ret = block_offset;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
qemu_iovec_reset(&local_qiov);
|
|
|
|
qemu_iovec_concat(&local_qiov, qiov, bytes_done, 512);
|
|
|
|
|
|
|
|
if (block_offset > 0) {
|
2016-06-20 21:31:46 +02:00
|
|
|
ret = bdrv_co_preadv(bs->file, block_offset, 512,
|
2016-04-25 14:53:22 +02:00
|
|
|
&local_qiov, 0);
|
2014-04-29 19:03:15 +02:00
|
|
|
if (ret < 0) {
|
2016-04-25 14:53:22 +02:00
|
|
|
goto fail;
|
2010-05-04 12:44:08 +02:00
|
|
|
}
|
2014-04-29 19:03:15 +02:00
|
|
|
} else {
|
2016-04-25 14:53:22 +02:00
|
|
|
qemu_iovec_memset(&local_qiov, 0, 0, 512);
|
2014-04-29 19:03:15 +02:00
|
|
|
}
|
2005-04-26 23:34:00 +02:00
|
|
|
nb_sectors--;
|
|
|
|
sector_num++;
|
2016-04-25 14:53:22 +02:00
|
|
|
bytes_done += 512;
|
2005-04-26 23:34:00 +02:00
|
|
|
}
|
|
|
|
|
2016-04-25 14:53:22 +02:00
|
|
|
ret = 0;
|
|
|
|
fail:
|
2011-10-20 13:16:22 +02:00
|
|
|
qemu_co_mutex_unlock(&s->lock);
|
2016-04-25 14:53:22 +02:00
|
|
|
qemu_iovec_destroy(&local_qiov);
|
|
|
|
|
2011-10-20 13:16:22 +02:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2005-04-26 23:34:00 +02:00
|
|
|
static void bochs_close(BlockDriverState *bs)
|
|
|
|
{
|
|
|
|
BDRVBochsState *s = bs->opaque;
|
2011-08-21 05:09:37 +02:00
|
|
|
g_free(s->catalog_bitmap);
|
2005-04-26 23:34:00 +02:00
|
|
|
}
|
|
|
|
|
2009-05-10 00:03:42 +02:00
|
|
|
static BlockDriver bdrv_bochs = {
|
2009-03-07 23:00:29 +01:00
|
|
|
.format_name = "bochs",
|
|
|
|
.instance_size = sizeof(BDRVBochsState),
|
|
|
|
.bdrv_probe = bochs_probe,
|
2010-05-04 12:44:21 +02:00
|
|
|
.bdrv_open = bochs_open,
|
2016-12-19 16:36:02 +01:00
|
|
|
.bdrv_child_perm = bdrv_format_default_perms,
|
2016-06-24 00:37:17 +02:00
|
|
|
.bdrv_refresh_limits = bochs_refresh_limits,
|
2016-04-25 14:53:22 +02:00
|
|
|
.bdrv_co_preadv = bochs_co_preadv,
|
2009-03-07 23:00:29 +01:00
|
|
|
.bdrv_close = bochs_close,
|
2020-05-13 13:05:12 +02:00
|
|
|
.is_format = true,
|
2005-04-26 23:34:00 +02:00
|
|
|
};
|
2009-05-10 00:03:42 +02:00
|
|
|
|
|
|
|
static void bdrv_bochs_init(void)
|
|
|
|
{
|
|
|
|
bdrv_register(&bdrv_bochs);
|
|
|
|
}
|
|
|
|
|
|
|
|
block_init(bdrv_bochs_init);
|