mirror of https://github.com/xemu-project/xemu.git
Merge remote branch 'kwolf/for-anthony' into HEAD
This commit is contained in:
commit
72375c2290
|
@ -12,7 +12,7 @@ block-obj-y += nbd.o block.o aio.o aes.o osdep.o qemu-config.o
|
||||||
block-obj-$(CONFIG_POSIX) += posix-aio-compat.o
|
block-obj-$(CONFIG_POSIX) += posix-aio-compat.o
|
||||||
block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o
|
block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o
|
||||||
|
|
||||||
block-nested-y += cow.o qcow.o vdi.o vmdk.o cloop.o dmg.o bochs.o vpc.o vvfat.o
|
block-nested-y += raw.o cow.o qcow.o vdi.o vmdk.o cloop.o dmg.o bochs.o vpc.o vvfat.o
|
||||||
block-nested-y += qcow2.o qcow2-refcount.o qcow2-cluster.o qcow2-snapshot.o
|
block-nested-y += qcow2.o qcow2-refcount.o qcow2-cluster.o qcow2-snapshot.o
|
||||||
block-nested-y += parallels.o nbd.o blkdebug.o
|
block-nested-y += parallels.o nbd.o blkdebug.o
|
||||||
block-nested-$(CONFIG_WIN32) += raw-win32.o
|
block-nested-$(CONFIG_WIN32) += raw-win32.o
|
||||||
|
|
394
block.c
394
block.c
|
@ -54,6 +54,7 @@ static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num,
|
||||||
uint8_t *buf, int nb_sectors);
|
uint8_t *buf, int nb_sectors);
|
||||||
static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num,
|
static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num,
|
||||||
const uint8_t *buf, int nb_sectors);
|
const uint8_t *buf, int nb_sectors);
|
||||||
|
static BlockDriver *find_protocol(const char *filename);
|
||||||
|
|
||||||
static QTAILQ_HEAD(, BlockDriverState) bdrv_states =
|
static QTAILQ_HEAD(, BlockDriverState) bdrv_states =
|
||||||
QTAILQ_HEAD_INITIALIZER(bdrv_states);
|
QTAILQ_HEAD_INITIALIZER(bdrv_states);
|
||||||
|
@ -203,6 +204,18 @@ int bdrv_create(BlockDriver *drv, const char* filename,
|
||||||
return drv->bdrv_create(filename, options);
|
return drv->bdrv_create(filename, options);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
int bdrv_create_file(const char* filename, QEMUOptionParameter *options)
|
||||||
|
{
|
||||||
|
BlockDriver *drv;
|
||||||
|
|
||||||
|
drv = find_protocol(filename);
|
||||||
|
if (drv == NULL) {
|
||||||
|
drv = bdrv_find_format("file");
|
||||||
|
}
|
||||||
|
|
||||||
|
return bdrv_create(drv, filename, options);
|
||||||
|
}
|
||||||
|
|
||||||
#ifdef _WIN32
|
#ifdef _WIN32
|
||||||
void get_tmp_filename(char *filename, int size)
|
void get_tmp_filename(char *filename, int size)
|
||||||
{
|
{
|
||||||
|
@ -246,35 +259,6 @@ int is_windows_drive(const char *filename)
|
||||||
}
|
}
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
static BlockDriver *find_protocol(const char *filename)
|
|
||||||
{
|
|
||||||
BlockDriver *drv1;
|
|
||||||
char protocol[128];
|
|
||||||
int len;
|
|
||||||
const char *p;
|
|
||||||
|
|
||||||
#ifdef _WIN32
|
|
||||||
if (is_windows_drive(filename) ||
|
|
||||||
is_windows_drive_prefix(filename))
|
|
||||||
return bdrv_find_format("raw");
|
|
||||||
#endif
|
|
||||||
p = strchr(filename, ':');
|
|
||||||
if (!p)
|
|
||||||
return bdrv_find_format("raw");
|
|
||||||
len = p - filename;
|
|
||||||
if (len > sizeof(protocol) - 1)
|
|
||||||
len = sizeof(protocol) - 1;
|
|
||||||
memcpy(protocol, filename, len);
|
|
||||||
protocol[len] = '\0';
|
|
||||||
QLIST_FOREACH(drv1, &bdrv_drivers, list) {
|
|
||||||
if (drv1->protocol_name &&
|
|
||||||
!strcmp(drv1->protocol_name, protocol)) {
|
|
||||||
return drv1;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Detect host devices. By convention, /dev/cdrom[N] is always
|
* Detect host devices. By convention, /dev/cdrom[N] is always
|
||||||
* recognized as a host CDROM.
|
* recognized as a host CDROM.
|
||||||
|
@ -297,6 +281,42 @@ static BlockDriver *find_hdev_driver(const char *filename)
|
||||||
return drv;
|
return drv;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static BlockDriver *find_protocol(const char *filename)
|
||||||
|
{
|
||||||
|
BlockDriver *drv1;
|
||||||
|
char protocol[128];
|
||||||
|
int len;
|
||||||
|
const char *p;
|
||||||
|
|
||||||
|
/* TODO Drivers without bdrv_file_open must be specified explicitly */
|
||||||
|
|
||||||
|
#ifdef _WIN32
|
||||||
|
if (is_windows_drive(filename) ||
|
||||||
|
is_windows_drive_prefix(filename))
|
||||||
|
return bdrv_find_format("file");
|
||||||
|
#endif
|
||||||
|
p = strchr(filename, ':');
|
||||||
|
if (!p) {
|
||||||
|
drv1 = find_hdev_driver(filename);
|
||||||
|
if (!drv1) {
|
||||||
|
drv1 = bdrv_find_format("file");
|
||||||
|
}
|
||||||
|
return drv1;
|
||||||
|
}
|
||||||
|
len = p - filename;
|
||||||
|
if (len > sizeof(protocol) - 1)
|
||||||
|
len = sizeof(protocol) - 1;
|
||||||
|
memcpy(protocol, filename, len);
|
||||||
|
protocol[len] = '\0';
|
||||||
|
QLIST_FOREACH(drv1, &bdrv_drivers, list) {
|
||||||
|
if (drv1->protocol_name &&
|
||||||
|
!strcmp(drv1->protocol_name, protocol)) {
|
||||||
|
return drv1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
static BlockDriver *find_image_format(const char *filename)
|
static BlockDriver *find_image_format(const char *filename)
|
||||||
{
|
{
|
||||||
int ret, score, score_max;
|
int ret, score, score_max;
|
||||||
|
@ -319,6 +339,7 @@ static BlockDriver *find_image_format(const char *filename)
|
||||||
}
|
}
|
||||||
|
|
||||||
score_max = 0;
|
score_max = 0;
|
||||||
|
drv = NULL;
|
||||||
QLIST_FOREACH(drv1, &bdrv_drivers, list) {
|
QLIST_FOREACH(drv1, &bdrv_drivers, list) {
|
||||||
if (drv1->bdrv_probe) {
|
if (drv1->bdrv_probe) {
|
||||||
score = drv1->bdrv_probe(buf, ret, filename);
|
score = drv1->bdrv_probe(buf, ret, filename);
|
||||||
|
@ -331,6 +352,118 @@ static BlockDriver *find_image_format(const char *filename)
|
||||||
return drv;
|
return drv;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Set the current 'total_sectors' value
|
||||||
|
*/
|
||||||
|
static int refresh_total_sectors(BlockDriverState *bs, int64_t hint)
|
||||||
|
{
|
||||||
|
BlockDriver *drv = bs->drv;
|
||||||
|
|
||||||
|
/* query actual device if possible, otherwise just trust the hint */
|
||||||
|
if (drv->bdrv_getlength) {
|
||||||
|
int64_t length = drv->bdrv_getlength(bs);
|
||||||
|
if (length < 0) {
|
||||||
|
return length;
|
||||||
|
}
|
||||||
|
hint = length >> BDRV_SECTOR_BITS;
|
||||||
|
}
|
||||||
|
|
||||||
|
bs->total_sectors = hint;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Common part for opening disk images and files
|
||||||
|
*/
|
||||||
|
static int bdrv_open_common(BlockDriverState *bs, const char *filename,
|
||||||
|
int flags, BlockDriver *drv)
|
||||||
|
{
|
||||||
|
int ret, open_flags;
|
||||||
|
|
||||||
|
assert(drv != NULL);
|
||||||
|
|
||||||
|
bs->file = NULL;
|
||||||
|
bs->total_sectors = 0;
|
||||||
|
bs->is_temporary = 0;
|
||||||
|
bs->encrypted = 0;
|
||||||
|
bs->valid_key = 0;
|
||||||
|
bs->open_flags = flags;
|
||||||
|
/* buffer_alignment defaulted to 512, drivers can change this value */
|
||||||
|
bs->buffer_alignment = 512;
|
||||||
|
|
||||||
|
pstrcpy(bs->filename, sizeof(bs->filename), filename);
|
||||||
|
|
||||||
|
if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv)) {
|
||||||
|
return -ENOTSUP;
|
||||||
|
}
|
||||||
|
|
||||||
|
bs->drv = drv;
|
||||||
|
bs->opaque = qemu_mallocz(drv->instance_size);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Yes, BDRV_O_NOCACHE aka O_DIRECT means we have to present a
|
||||||
|
* write cache to the guest. We do need the fdatasync to flush
|
||||||
|
* out transactions for block allocations, and we maybe have a
|
||||||
|
* volatile write cache in our backing device to deal with.
|
||||||
|
*/
|
||||||
|
if (flags & (BDRV_O_CACHE_WB|BDRV_O_NOCACHE))
|
||||||
|
bs->enable_write_cache = 1;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Clear flags that are internal to the block layer before opening the
|
||||||
|
* image.
|
||||||
|
*/
|
||||||
|
open_flags = flags & ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Snapshots should be writeable.
|
||||||
|
*/
|
||||||
|
if (bs->is_temporary) {
|
||||||
|
open_flags |= BDRV_O_RDWR;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Open the image, either directly or using a protocol */
|
||||||
|
if (drv->bdrv_file_open) {
|
||||||
|
ret = drv->bdrv_file_open(bs, filename, open_flags);
|
||||||
|
} else {
|
||||||
|
ret = bdrv_file_open(&bs->file, filename, open_flags);
|
||||||
|
if (ret >= 0) {
|
||||||
|
ret = drv->bdrv_open(bs, open_flags);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ret < 0) {
|
||||||
|
goto free_and_fail;
|
||||||
|
}
|
||||||
|
|
||||||
|
bs->keep_read_only = bs->read_only = !(open_flags & BDRV_O_RDWR);
|
||||||
|
|
||||||
|
ret = refresh_total_sectors(bs, bs->total_sectors);
|
||||||
|
if (ret < 0) {
|
||||||
|
goto free_and_fail;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifndef _WIN32
|
||||||
|
if (bs->is_temporary) {
|
||||||
|
unlink(filename);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
free_and_fail:
|
||||||
|
if (bs->file) {
|
||||||
|
bdrv_delete(bs->file);
|
||||||
|
bs->file = NULL;
|
||||||
|
}
|
||||||
|
qemu_free(bs->opaque);
|
||||||
|
bs->opaque = NULL;
|
||||||
|
bs->drv = NULL;
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Opens a file using a protocol (file, host_device, nbd, ...)
|
||||||
|
*/
|
||||||
int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags)
|
int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags)
|
||||||
{
|
{
|
||||||
BlockDriverState *bs;
|
BlockDriverState *bs;
|
||||||
|
@ -343,7 +476,7 @@ int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags)
|
||||||
}
|
}
|
||||||
|
|
||||||
bs = bdrv_new("");
|
bs = bdrv_new("");
|
||||||
ret = bdrv_open(bs, filename, flags, drv);
|
ret = bdrv_open_common(bs, filename, flags, drv);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
bdrv_delete(bs);
|
bdrv_delete(bs);
|
||||||
return ret;
|
return ret;
|
||||||
|
@ -353,19 +486,13 @@ int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags)
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Opens a disk image (raw, qcow2, vmdk, ...)
|
||||||
|
*/
|
||||||
int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
|
int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
|
||||||
BlockDriver *drv)
|
BlockDriver *drv)
|
||||||
{
|
{
|
||||||
int ret, open_flags;
|
int ret;
|
||||||
char tmp_filename[PATH_MAX];
|
|
||||||
char backing_filename[PATH_MAX];
|
|
||||||
|
|
||||||
bs->is_temporary = 0;
|
|
||||||
bs->encrypted = 0;
|
|
||||||
bs->valid_key = 0;
|
|
||||||
bs->open_flags = flags;
|
|
||||||
/* buffer_alignment defaulted to 512, drivers can change this value */
|
|
||||||
bs->buffer_alignment = 512;
|
|
||||||
|
|
||||||
if (flags & BDRV_O_SNAPSHOT) {
|
if (flags & BDRV_O_SNAPSHOT) {
|
||||||
BlockDriverState *bs1;
|
BlockDriverState *bs1;
|
||||||
|
@ -373,6 +500,8 @@ int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
|
||||||
int is_protocol = 0;
|
int is_protocol = 0;
|
||||||
BlockDriver *bdrv_qcow2;
|
BlockDriver *bdrv_qcow2;
|
||||||
QEMUOptionParameter *options;
|
QEMUOptionParameter *options;
|
||||||
|
char tmp_filename[PATH_MAX];
|
||||||
|
char backing_filename[PATH_MAX];
|
||||||
|
|
||||||
/* if snapshot, we create a temporary backing file and open it
|
/* if snapshot, we create a temporary backing file and open it
|
||||||
instead of opening 'filename' directly */
|
instead of opening 'filename' directly */
|
||||||
|
@ -411,6 +540,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
|
||||||
}
|
}
|
||||||
|
|
||||||
ret = bdrv_create(bdrv_qcow2, tmp_filename, options);
|
ret = bdrv_create(bdrv_qcow2, tmp_filename, options);
|
||||||
|
free_option_parameters(options);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
@ -420,66 +550,28 @@ int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
|
||||||
bs->is_temporary = 1;
|
bs->is_temporary = 1;
|
||||||
}
|
}
|
||||||
|
|
||||||
pstrcpy(bs->filename, sizeof(bs->filename), filename);
|
/* Find the right image format driver */
|
||||||
|
|
||||||
if (!drv) {
|
if (!drv) {
|
||||||
drv = find_hdev_driver(filename);
|
drv = find_image_format(filename);
|
||||||
if (!drv) {
|
|
||||||
drv = find_image_format(filename);
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
if (!drv) {
|
if (!drv) {
|
||||||
ret = -ENOENT;
|
ret = -ENOENT;
|
||||||
goto unlink_and_fail;
|
goto unlink_and_fail;
|
||||||
}
|
}
|
||||||
if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv)) {
|
|
||||||
ret = -ENOTSUP;
|
/* Open the image */
|
||||||
|
ret = bdrv_open_common(bs, filename, flags, drv);
|
||||||
|
if (ret < 0) {
|
||||||
goto unlink_and_fail;
|
goto unlink_and_fail;
|
||||||
}
|
}
|
||||||
|
|
||||||
bs->drv = drv;
|
/* If there is a backing file, use it */
|
||||||
bs->opaque = qemu_mallocz(drv->instance_size);
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Yes, BDRV_O_NOCACHE aka O_DIRECT means we have to present a
|
|
||||||
* write cache to the guest. We do need the fdatasync to flush
|
|
||||||
* out transactions for block allocations, and we maybe have a
|
|
||||||
* volatile write cache in our backing device to deal with.
|
|
||||||
*/
|
|
||||||
if (flags & (BDRV_O_CACHE_WB|BDRV_O_NOCACHE))
|
|
||||||
bs->enable_write_cache = 1;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Clear flags that are internal to the block layer before opening the
|
|
||||||
* image.
|
|
||||||
*/
|
|
||||||
open_flags = flags & ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING);
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Snapshots should be writeable.
|
|
||||||
*/
|
|
||||||
if (bs->is_temporary) {
|
|
||||||
open_flags |= BDRV_O_RDWR;
|
|
||||||
}
|
|
||||||
|
|
||||||
ret = drv->bdrv_open(bs, filename, open_flags);
|
|
||||||
if (ret < 0) {
|
|
||||||
goto free_and_fail;
|
|
||||||
}
|
|
||||||
|
|
||||||
bs->keep_read_only = bs->read_only = !(open_flags & BDRV_O_RDWR);
|
|
||||||
if (drv->bdrv_getlength) {
|
|
||||||
bs->total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS;
|
|
||||||
}
|
|
||||||
#ifndef _WIN32
|
|
||||||
if (bs->is_temporary) {
|
|
||||||
unlink(filename);
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
if ((flags & BDRV_O_NO_BACKING) == 0 && bs->backing_file[0] != '\0') {
|
if ((flags & BDRV_O_NO_BACKING) == 0 && bs->backing_file[0] != '\0') {
|
||||||
/* if there is a backing file, use it */
|
char backing_filename[PATH_MAX];
|
||||||
|
int back_flags;
|
||||||
BlockDriver *back_drv = NULL;
|
BlockDriver *back_drv = NULL;
|
||||||
|
|
||||||
bs->backing_hd = bdrv_new("");
|
bs->backing_hd = bdrv_new("");
|
||||||
path_combine(backing_filename, sizeof(backing_filename),
|
path_combine(backing_filename, sizeof(backing_filename),
|
||||||
filename, bs->backing_file);
|
filename, bs->backing_file);
|
||||||
|
@ -487,9 +579,10 @@ int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
|
||||||
back_drv = bdrv_find_format(bs->backing_format);
|
back_drv = bdrv_find_format(bs->backing_format);
|
||||||
|
|
||||||
/* backing files always opened read-only */
|
/* backing files always opened read-only */
|
||||||
open_flags &= ~BDRV_O_RDWR;
|
back_flags =
|
||||||
|
flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING);
|
||||||
|
|
||||||
ret = bdrv_open(bs->backing_hd, backing_filename, open_flags, back_drv);
|
ret = bdrv_open(bs->backing_hd, backing_filename, back_flags, back_drv);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
bdrv_close(bs);
|
bdrv_close(bs);
|
||||||
return ret;
|
return ret;
|
||||||
|
@ -508,23 +601,23 @@ int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
|
||||||
if (bs->change_cb)
|
if (bs->change_cb)
|
||||||
bs->change_cb(bs->change_opaque);
|
bs->change_cb(bs->change_opaque);
|
||||||
}
|
}
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
|
|
||||||
free_and_fail:
|
|
||||||
qemu_free(bs->opaque);
|
|
||||||
bs->opaque = NULL;
|
|
||||||
bs->drv = NULL;
|
|
||||||
unlink_and_fail:
|
unlink_and_fail:
|
||||||
if (bs->is_temporary)
|
if (bs->is_temporary) {
|
||||||
unlink(filename);
|
unlink(filename);
|
||||||
|
}
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
void bdrv_close(BlockDriverState *bs)
|
void bdrv_close(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
if (bs->drv) {
|
if (bs->drv) {
|
||||||
if (bs->backing_hd)
|
if (bs->backing_hd) {
|
||||||
bdrv_delete(bs->backing_hd);
|
bdrv_delete(bs->backing_hd);
|
||||||
|
bs->backing_hd = NULL;
|
||||||
|
}
|
||||||
bs->drv->bdrv_close(bs);
|
bs->drv->bdrv_close(bs);
|
||||||
qemu_free(bs->opaque);
|
qemu_free(bs->opaque);
|
||||||
#ifdef _WIN32
|
#ifdef _WIN32
|
||||||
|
@ -535,6 +628,10 @@ void bdrv_close(BlockDriverState *bs)
|
||||||
bs->opaque = NULL;
|
bs->opaque = NULL;
|
||||||
bs->drv = NULL;
|
bs->drv = NULL;
|
||||||
|
|
||||||
|
if (bs->file != NULL) {
|
||||||
|
bdrv_close(bs->file);
|
||||||
|
}
|
||||||
|
|
||||||
/* call the change callback */
|
/* call the change callback */
|
||||||
bs->media_changed = 1;
|
bs->media_changed = 1;
|
||||||
if (bs->change_cb)
|
if (bs->change_cb)
|
||||||
|
@ -550,6 +647,10 @@ void bdrv_delete(BlockDriverState *bs)
|
||||||
}
|
}
|
||||||
|
|
||||||
bdrv_close(bs);
|
bdrv_close(bs);
|
||||||
|
if (bs->file != NULL) {
|
||||||
|
bdrv_delete(bs->file);
|
||||||
|
}
|
||||||
|
|
||||||
qemu_free(bs);
|
qemu_free(bs);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -780,6 +881,10 @@ int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
||||||
set_dirty_bitmap(bs, sector_num, nb_sectors, 1);
|
set_dirty_bitmap(bs, sector_num, nb_sectors, 1);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
if (bs->wr_highest_sector < sector_num + nb_sectors - 1) {
|
||||||
|
bs->wr_highest_sector = sector_num + nb_sectors - 1;
|
||||||
|
}
|
||||||
|
|
||||||
return drv->bdrv_write(bs, sector_num, buf, nb_sectors);
|
return drv->bdrv_write(bs, sector_num, buf, nb_sectors);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -883,13 +988,18 @@ int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
||||||
int bdrv_truncate(BlockDriverState *bs, int64_t offset)
|
int bdrv_truncate(BlockDriverState *bs, int64_t offset)
|
||||||
{
|
{
|
||||||
BlockDriver *drv = bs->drv;
|
BlockDriver *drv = bs->drv;
|
||||||
|
int ret;
|
||||||
if (!drv)
|
if (!drv)
|
||||||
return -ENOMEDIUM;
|
return -ENOMEDIUM;
|
||||||
if (!drv->bdrv_truncate)
|
if (!drv->bdrv_truncate)
|
||||||
return -ENOTSUP;
|
return -ENOTSUP;
|
||||||
if (bs->read_only)
|
if (bs->read_only)
|
||||||
return -EACCES;
|
return -EACCES;
|
||||||
return drv->bdrv_truncate(bs, offset);
|
ret = drv->bdrv_truncate(bs, offset);
|
||||||
|
if (ret == 0) {
|
||||||
|
ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS);
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
|
@ -900,8 +1010,12 @@ int64_t bdrv_getlength(BlockDriverState *bs)
|
||||||
BlockDriver *drv = bs->drv;
|
BlockDriver *drv = bs->drv;
|
||||||
if (!drv)
|
if (!drv)
|
||||||
return -ENOMEDIUM;
|
return -ENOMEDIUM;
|
||||||
if (!drv->bdrv_getlength) {
|
|
||||||
/* legacy mode */
|
/* Fixed size devices use the total_sectors value for speed instead of
|
||||||
|
issuing a length query (like lseek) on each call. Also, legacy block
|
||||||
|
drivers don't provide a bdrv_getlength function and must use
|
||||||
|
total_sectors. */
|
||||||
|
if (!bs->growable || !drv->bdrv_getlength) {
|
||||||
return bs->total_sectors * BDRV_SECTOR_SIZE;
|
return bs->total_sectors * BDRV_SECTOR_SIZE;
|
||||||
}
|
}
|
||||||
return drv->bdrv_getlength(bs);
|
return drv->bdrv_getlength(bs);
|
||||||
|
@ -1208,6 +1322,19 @@ void bdrv_flush_all(void)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
int bdrv_has_zero_init(BlockDriverState *bs)
|
||||||
|
{
|
||||||
|
assert(bs->drv);
|
||||||
|
|
||||||
|
if (bs->drv->no_zero_init) {
|
||||||
|
return 0;
|
||||||
|
} else if (bs->file) {
|
||||||
|
return bdrv_has_zero_init(bs->file);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Returns true iff the specified sector is present in the disk image. Drivers
|
* Returns true iff the specified sector is present in the disk image. Drivers
|
||||||
* not implementing the functionality are assumed to not support backing files,
|
* not implementing the functionality are assumed to not support backing files,
|
||||||
|
@ -1408,6 +1535,35 @@ void bdrv_stats_print(Monitor *mon, const QObject *data)
|
||||||
qlist_iter(qobject_to_qlist(data), bdrv_stats_iter, mon);
|
qlist_iter(qobject_to_qlist(data), bdrv_stats_iter, mon);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static QObject* bdrv_info_stats_bs(BlockDriverState *bs)
|
||||||
|
{
|
||||||
|
QObject *res;
|
||||||
|
QDict *dict;
|
||||||
|
|
||||||
|
res = qobject_from_jsonf("{ 'stats': {"
|
||||||
|
"'rd_bytes': %" PRId64 ","
|
||||||
|
"'wr_bytes': %" PRId64 ","
|
||||||
|
"'rd_operations': %" PRId64 ","
|
||||||
|
"'wr_operations': %" PRId64 ","
|
||||||
|
"'wr_highest_offset': %" PRId64
|
||||||
|
"} }",
|
||||||
|
bs->rd_bytes, bs->wr_bytes,
|
||||||
|
bs->rd_ops, bs->wr_ops,
|
||||||
|
bs->wr_highest_sector * 512);
|
||||||
|
dict = qobject_to_qdict(res);
|
||||||
|
|
||||||
|
if (*bs->device_name) {
|
||||||
|
qdict_put(dict, "device", qstring_from_str(bs->device_name));
|
||||||
|
}
|
||||||
|
|
||||||
|
if (bs->file) {
|
||||||
|
QObject *parent = bdrv_info_stats_bs(bs->file);
|
||||||
|
qdict_put_obj(dict, "parent", parent);
|
||||||
|
}
|
||||||
|
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* bdrv_info_stats(): show block device statistics
|
* bdrv_info_stats(): show block device statistics
|
||||||
*
|
*
|
||||||
|
@ -1422,19 +1578,34 @@ void bdrv_stats_print(Monitor *mon, const QObject *data)
|
||||||
* - "wr_bytes": bytes written
|
* - "wr_bytes": bytes written
|
||||||
* - "rd_operations": read operations
|
* - "rd_operations": read operations
|
||||||
* - "wr_operations": write operations
|
* - "wr_operations": write operations
|
||||||
*
|
* - "wr_highest_offset": Highest offset of a sector written since the
|
||||||
|
* BlockDriverState has been opened
|
||||||
|
* - "parent": Contains recursively the statistics of the underlying
|
||||||
|
* protocol (e.g. the host file for a qcow2 image). If there is no
|
||||||
|
* underlying protocol, this field is omitted.
|
||||||
|
*
|
||||||
* Example:
|
* Example:
|
||||||
*
|
*
|
||||||
* [ { "device": "ide0-hd0",
|
* [ { "device": "ide0-hd0",
|
||||||
* "stats": { "rd_bytes": 512,
|
* "stats": { "rd_bytes": 512,
|
||||||
* "wr_bytes": 0,
|
* "wr_bytes": 0,
|
||||||
* "rd_operations": 1,
|
* "rd_operations": 1,
|
||||||
* "wr_operations": 0 } },
|
* "wr_operations": 0,
|
||||||
|
* "wr_highest_offset": 0,
|
||||||
|
* "parent": {
|
||||||
|
* "stats": { "rd_bytes": 1024,
|
||||||
|
* "wr_bytes": 0,
|
||||||
|
* "rd_operations": 2,
|
||||||
|
* "wr_operations": 0,
|
||||||
|
* "wr_highest_offset": 0,
|
||||||
|
* }
|
||||||
|
* } } },
|
||||||
* { "device": "ide1-cd0",
|
* { "device": "ide1-cd0",
|
||||||
* "stats": { "rd_bytes": 0,
|
* "stats": { "rd_bytes": 0,
|
||||||
* "wr_bytes": 0,
|
* "wr_bytes": 0,
|
||||||
* "rd_operations": 0,
|
* "rd_operations": 0,
|
||||||
* "wr_operations": 0 } } ]
|
* "wr_operations": 0,
|
||||||
|
* "wr_highest_offset": 0 } },
|
||||||
*/
|
*/
|
||||||
void bdrv_info_stats(Monitor *mon, QObject **ret_data)
|
void bdrv_info_stats(Monitor *mon, QObject **ret_data)
|
||||||
{
|
{
|
||||||
|
@ -1445,15 +1616,7 @@ void bdrv_info_stats(Monitor *mon, QObject **ret_data)
|
||||||
devices = qlist_new();
|
devices = qlist_new();
|
||||||
|
|
||||||
QTAILQ_FOREACH(bs, &bdrv_states, list) {
|
QTAILQ_FOREACH(bs, &bdrv_states, list) {
|
||||||
obj = qobject_from_jsonf("{ 'device': %s, 'stats': {"
|
obj = bdrv_info_stats_bs(bs);
|
||||||
"'rd_bytes': %" PRId64 ","
|
|
||||||
"'wr_bytes': %" PRId64 ","
|
|
||||||
"'rd_operations': %" PRId64 ","
|
|
||||||
"'wr_operations': %" PRId64
|
|
||||||
"} }",
|
|
||||||
bs->device_name,
|
|
||||||
bs->rd_bytes, bs->wr_bytes,
|
|
||||||
bs->rd_ops, bs->wr_ops);
|
|
||||||
qlist_append_obj(devices, obj);
|
qlist_append_obj(devices, obj);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1712,9 +1875,12 @@ BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
|
||||||
cb, opaque);
|
cb, opaque);
|
||||||
|
|
||||||
if (ret) {
|
if (ret) {
|
||||||
/* Update stats even though technically transfer has not happened. */
|
/* Update stats even though technically transfer has not happened. */
|
||||||
bs->wr_bytes += (unsigned) nb_sectors * BDRV_SECTOR_SIZE;
|
bs->wr_bytes += (unsigned) nb_sectors * BDRV_SECTOR_SIZE;
|
||||||
bs->wr_ops ++;
|
bs->wr_ops ++;
|
||||||
|
if (bs->wr_highest_sector < sector_num + nb_sectors - 1) {
|
||||||
|
bs->wr_highest_sector = sector_num + nb_sectors - 1;
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
return ret;
|
return ret;
|
||||||
|
|
2
block.h
2
block.h
|
@ -57,6 +57,7 @@ BlockDriver *bdrv_find_format(const char *format_name);
|
||||||
BlockDriver *bdrv_find_whitelisted_format(const char *format_name);
|
BlockDriver *bdrv_find_whitelisted_format(const char *format_name);
|
||||||
int bdrv_create(BlockDriver *drv, const char* filename,
|
int bdrv_create(BlockDriver *drv, const char* filename,
|
||||||
QEMUOptionParameter *options);
|
QEMUOptionParameter *options);
|
||||||
|
int bdrv_create_file(const char* filename, QEMUOptionParameter *options);
|
||||||
BlockDriverState *bdrv_new(const char *device_name);
|
BlockDriverState *bdrv_new(const char *device_name);
|
||||||
void bdrv_delete(BlockDriverState *bs);
|
void bdrv_delete(BlockDriverState *bs);
|
||||||
int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
|
int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
|
||||||
|
@ -121,6 +122,7 @@ BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
|
||||||
void bdrv_flush(BlockDriverState *bs);
|
void bdrv_flush(BlockDriverState *bs);
|
||||||
void bdrv_flush_all(void);
|
void bdrv_flush_all(void);
|
||||||
|
|
||||||
|
int bdrv_has_zero_init(BlockDriverState *bs);
|
||||||
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
|
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
|
||||||
int *pnum);
|
int *pnum);
|
||||||
|
|
||||||
|
|
|
@ -44,7 +44,6 @@ typedef struct BlkdebugVars {
|
||||||
} BlkdebugVars;
|
} BlkdebugVars;
|
||||||
|
|
||||||
typedef struct BDRVBlkdebugState {
|
typedef struct BDRVBlkdebugState {
|
||||||
BlockDriverState *hd;
|
|
||||||
BlkdebugVars vars;
|
BlkdebugVars vars;
|
||||||
QLIST_HEAD(list, BlkdebugRule) rules[BLKDBG_EVENT_MAX];
|
QLIST_HEAD(list, BlkdebugRule) rules[BLKDBG_EVENT_MAX];
|
||||||
} BDRVBlkdebugState;
|
} BDRVBlkdebugState;
|
||||||
|
@ -303,7 +302,7 @@ static int blkdebug_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
filename = c + 1;
|
filename = c + 1;
|
||||||
|
|
||||||
/* Open the backing file */
|
/* Open the backing file */
|
||||||
ret = bdrv_file_open(&s->hd, filename, flags);
|
ret = bdrv_file_open(&bs->file, filename, flags);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
@ -362,7 +361,7 @@ static BlockDriverAIOCB *blkdebug_aio_readv(BlockDriverState *bs,
|
||||||
}
|
}
|
||||||
|
|
||||||
BlockDriverAIOCB *acb =
|
BlockDriverAIOCB *acb =
|
||||||
bdrv_aio_readv(s->hd, sector_num, qiov, nb_sectors, cb, opaque);
|
bdrv_aio_readv(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
|
||||||
return acb;
|
return acb;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -377,7 +376,7 @@ static BlockDriverAIOCB *blkdebug_aio_writev(BlockDriverState *bs,
|
||||||
}
|
}
|
||||||
|
|
||||||
BlockDriverAIOCB *acb =
|
BlockDriverAIOCB *acb =
|
||||||
bdrv_aio_writev(s->hd, sector_num, qiov, nb_sectors, cb, opaque);
|
bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
|
||||||
return acb;
|
return acb;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -393,21 +392,17 @@ static void blkdebug_close(BlockDriverState *bs)
|
||||||
qemu_free(rule);
|
qemu_free(rule);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
bdrv_delete(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static void blkdebug_flush(BlockDriverState *bs)
|
static void blkdebug_flush(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
BDRVBlkdebugState *s = bs->opaque;
|
bdrv_flush(bs->file);
|
||||||
bdrv_flush(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static BlockDriverAIOCB *blkdebug_aio_flush(BlockDriverState *bs,
|
static BlockDriverAIOCB *blkdebug_aio_flush(BlockDriverState *bs,
|
||||||
BlockDriverCompletionFunc *cb, void *opaque)
|
BlockDriverCompletionFunc *cb, void *opaque)
|
||||||
{
|
{
|
||||||
BDRVBlkdebugState *s = bs->opaque;
|
return bdrv_aio_flush(bs->file, cb, opaque);
|
||||||
return bdrv_aio_flush(s->hd, cb, opaque);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static void process_rule(BlockDriverState *bs, struct BlkdebugRule *rule,
|
static void process_rule(BlockDriverState *bs, struct BlkdebugRule *rule,
|
||||||
|
@ -456,7 +451,7 @@ static BlockDriver bdrv_blkdebug = {
|
||||||
|
|
||||||
.instance_size = sizeof(BDRVBlkdebugState),
|
.instance_size = sizeof(BDRVBlkdebugState),
|
||||||
|
|
||||||
.bdrv_open = blkdebug_open,
|
.bdrv_file_open = blkdebug_open,
|
||||||
.bdrv_close = blkdebug_close,
|
.bdrv_close = blkdebug_close,
|
||||||
.bdrv_flush = blkdebug_flush,
|
.bdrv_flush = blkdebug_flush,
|
||||||
|
|
||||||
|
|
|
@ -252,7 +252,7 @@ static BlockDriver bdrv_bochs = {
|
||||||
.format_name = "bochs",
|
.format_name = "bochs",
|
||||||
.instance_size = sizeof(BDRVBochsState),
|
.instance_size = sizeof(BDRVBochsState),
|
||||||
.bdrv_probe = bochs_probe,
|
.bdrv_probe = bochs_probe,
|
||||||
.bdrv_open = bochs_open,
|
.bdrv_file_open = bochs_open,
|
||||||
.bdrv_read = bochs_read,
|
.bdrv_read = bochs_read,
|
||||||
.bdrv_close = bochs_close,
|
.bdrv_close = bochs_close,
|
||||||
};
|
};
|
||||||
|
|
|
@ -158,7 +158,7 @@ static BlockDriver bdrv_cloop = {
|
||||||
.format_name = "cloop",
|
.format_name = "cloop",
|
||||||
.instance_size = sizeof(BDRVCloopState),
|
.instance_size = sizeof(BDRVCloopState),
|
||||||
.bdrv_probe = cloop_probe,
|
.bdrv_probe = cloop_probe,
|
||||||
.bdrv_open = cloop_open,
|
.bdrv_file_open = cloop_open,
|
||||||
.bdrv_read = cloop_read,
|
.bdrv_read = cloop_read,
|
||||||
.bdrv_close = cloop_close,
|
.bdrv_close = cloop_close,
|
||||||
};
|
};
|
||||||
|
|
|
@ -291,7 +291,7 @@ static BlockDriver bdrv_cow = {
|
||||||
.format_name = "cow",
|
.format_name = "cow",
|
||||||
.instance_size = sizeof(BDRVCowState),
|
.instance_size = sizeof(BDRVCowState),
|
||||||
.bdrv_probe = cow_probe,
|
.bdrv_probe = cow_probe,
|
||||||
.bdrv_open = cow_open,
|
.bdrv_file_open = cow_open,
|
||||||
.bdrv_read = cow_read,
|
.bdrv_read = cow_read,
|
||||||
.bdrv_write = cow_write,
|
.bdrv_write = cow_write,
|
||||||
.bdrv_close = cow_close,
|
.bdrv_close = cow_close,
|
||||||
|
|
10
block/curl.c
10
block/curl.c
|
@ -495,7 +495,7 @@ static BlockDriver bdrv_http = {
|
||||||
.protocol_name = "http",
|
.protocol_name = "http",
|
||||||
|
|
||||||
.instance_size = sizeof(BDRVCURLState),
|
.instance_size = sizeof(BDRVCURLState),
|
||||||
.bdrv_open = curl_open,
|
.bdrv_file_open = curl_open,
|
||||||
.bdrv_close = curl_close,
|
.bdrv_close = curl_close,
|
||||||
.bdrv_getlength = curl_getlength,
|
.bdrv_getlength = curl_getlength,
|
||||||
|
|
||||||
|
@ -507,7 +507,7 @@ static BlockDriver bdrv_https = {
|
||||||
.protocol_name = "https",
|
.protocol_name = "https",
|
||||||
|
|
||||||
.instance_size = sizeof(BDRVCURLState),
|
.instance_size = sizeof(BDRVCURLState),
|
||||||
.bdrv_open = curl_open,
|
.bdrv_file_open = curl_open,
|
||||||
.bdrv_close = curl_close,
|
.bdrv_close = curl_close,
|
||||||
.bdrv_getlength = curl_getlength,
|
.bdrv_getlength = curl_getlength,
|
||||||
|
|
||||||
|
@ -519,7 +519,7 @@ static BlockDriver bdrv_ftp = {
|
||||||
.protocol_name = "ftp",
|
.protocol_name = "ftp",
|
||||||
|
|
||||||
.instance_size = sizeof(BDRVCURLState),
|
.instance_size = sizeof(BDRVCURLState),
|
||||||
.bdrv_open = curl_open,
|
.bdrv_file_open = curl_open,
|
||||||
.bdrv_close = curl_close,
|
.bdrv_close = curl_close,
|
||||||
.bdrv_getlength = curl_getlength,
|
.bdrv_getlength = curl_getlength,
|
||||||
|
|
||||||
|
@ -531,7 +531,7 @@ static BlockDriver bdrv_ftps = {
|
||||||
.protocol_name = "ftps",
|
.protocol_name = "ftps",
|
||||||
|
|
||||||
.instance_size = sizeof(BDRVCURLState),
|
.instance_size = sizeof(BDRVCURLState),
|
||||||
.bdrv_open = curl_open,
|
.bdrv_file_open = curl_open,
|
||||||
.bdrv_close = curl_close,
|
.bdrv_close = curl_close,
|
||||||
.bdrv_getlength = curl_getlength,
|
.bdrv_getlength = curl_getlength,
|
||||||
|
|
||||||
|
@ -543,7 +543,7 @@ static BlockDriver bdrv_tftp = {
|
||||||
.protocol_name = "tftp",
|
.protocol_name = "tftp",
|
||||||
|
|
||||||
.instance_size = sizeof(BDRVCURLState),
|
.instance_size = sizeof(BDRVCURLState),
|
||||||
.bdrv_open = curl_open,
|
.bdrv_file_open = curl_open,
|
||||||
.bdrv_close = curl_close,
|
.bdrv_close = curl_close,
|
||||||
.bdrv_getlength = curl_getlength,
|
.bdrv_getlength = curl_getlength,
|
||||||
|
|
||||||
|
|
|
@ -288,7 +288,7 @@ static BlockDriver bdrv_dmg = {
|
||||||
.format_name = "dmg",
|
.format_name = "dmg",
|
||||||
.instance_size = sizeof(BDRVDMGState),
|
.instance_size = sizeof(BDRVDMGState),
|
||||||
.bdrv_probe = dmg_probe,
|
.bdrv_probe = dmg_probe,
|
||||||
.bdrv_open = dmg_open,
|
.bdrv_file_open = dmg_open,
|
||||||
.bdrv_read = dmg_read,
|
.bdrv_read = dmg_read,
|
||||||
.bdrv_close = dmg_close,
|
.bdrv_close = dmg_close,
|
||||||
};
|
};
|
||||||
|
|
|
@ -177,7 +177,7 @@ static int64_t nbd_getlength(BlockDriverState *bs)
|
||||||
static BlockDriver bdrv_nbd = {
|
static BlockDriver bdrv_nbd = {
|
||||||
.format_name = "nbd",
|
.format_name = "nbd",
|
||||||
.instance_size = sizeof(BDRVNBDState),
|
.instance_size = sizeof(BDRVNBDState),
|
||||||
.bdrv_open = nbd_open,
|
.bdrv_file_open = nbd_open,
|
||||||
.bdrv_read = nbd_read,
|
.bdrv_read = nbd_read,
|
||||||
.bdrv_write = nbd_write,
|
.bdrv_write = nbd_write,
|
||||||
.bdrv_close = nbd_close,
|
.bdrv_close = nbd_close,
|
||||||
|
|
|
@ -167,7 +167,7 @@ static BlockDriver bdrv_parallels = {
|
||||||
.format_name = "parallels",
|
.format_name = "parallels",
|
||||||
.instance_size = sizeof(BDRVParallelsState),
|
.instance_size = sizeof(BDRVParallelsState),
|
||||||
.bdrv_probe = parallels_probe,
|
.bdrv_probe = parallels_probe,
|
||||||
.bdrv_open = parallels_open,
|
.bdrv_file_open = parallels_open,
|
||||||
.bdrv_read = parallels_read,
|
.bdrv_read = parallels_read,
|
||||||
.bdrv_close = parallels_close,
|
.bdrv_close = parallels_close,
|
||||||
};
|
};
|
||||||
|
|
67
block/qcow.c
67
block/qcow.c
|
@ -76,7 +76,7 @@ typedef struct BDRVQcowState {
|
||||||
AES_KEY aes_decrypt_key;
|
AES_KEY aes_decrypt_key;
|
||||||
} BDRVQcowState;
|
} BDRVQcowState;
|
||||||
|
|
||||||
static int decompress_cluster(BDRVQcowState *s, uint64_t cluster_offset);
|
static int decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
|
||||||
|
|
||||||
static int qcow_probe(const uint8_t *buf, int buf_size, const char *filename)
|
static int qcow_probe(const uint8_t *buf, int buf_size, const char *filename)
|
||||||
{
|
{
|
||||||
|
@ -90,16 +90,13 @@ static int qcow_probe(const uint8_t *buf, int buf_size, const char *filename)
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
|
static int qcow_open(BlockDriverState *bs, int flags)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
BDRVQcowState *s = bs->opaque;
|
||||||
int len, i, shift, ret;
|
int len, i, shift;
|
||||||
QCowHeader header;
|
QCowHeader header;
|
||||||
|
|
||||||
ret = bdrv_file_open(&s->hd, filename, flags);
|
if (bdrv_pread(bs->file, 0, &header, sizeof(header)) != sizeof(header))
|
||||||
if (ret < 0)
|
|
||||||
return ret;
|
|
||||||
if (bdrv_pread(s->hd, 0, &header, sizeof(header)) != sizeof(header))
|
|
||||||
goto fail;
|
goto fail;
|
||||||
be32_to_cpus(&header.magic);
|
be32_to_cpus(&header.magic);
|
||||||
be32_to_cpus(&header.version);
|
be32_to_cpus(&header.version);
|
||||||
|
@ -135,7 +132,7 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
s->l1_table = qemu_malloc(s->l1_size * sizeof(uint64_t));
|
s->l1_table = qemu_malloc(s->l1_size * sizeof(uint64_t));
|
||||||
if (!s->l1_table)
|
if (!s->l1_table)
|
||||||
goto fail;
|
goto fail;
|
||||||
if (bdrv_pread(s->hd, s->l1_table_offset, s->l1_table, s->l1_size * sizeof(uint64_t)) !=
|
if (bdrv_pread(bs->file, s->l1_table_offset, s->l1_table, s->l1_size * sizeof(uint64_t)) !=
|
||||||
s->l1_size * sizeof(uint64_t))
|
s->l1_size * sizeof(uint64_t))
|
||||||
goto fail;
|
goto fail;
|
||||||
for(i = 0;i < s->l1_size; i++) {
|
for(i = 0;i < s->l1_size; i++) {
|
||||||
|
@ -158,7 +155,7 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
len = header.backing_file_size;
|
len = header.backing_file_size;
|
||||||
if (len > 1023)
|
if (len > 1023)
|
||||||
len = 1023;
|
len = 1023;
|
||||||
if (bdrv_pread(s->hd, header.backing_file_offset, bs->backing_file, len) != len)
|
if (bdrv_pread(bs->file, header.backing_file_offset, bs->backing_file, len) != len)
|
||||||
goto fail;
|
goto fail;
|
||||||
bs->backing_file[len] = '\0';
|
bs->backing_file[len] = '\0';
|
||||||
}
|
}
|
||||||
|
@ -169,7 +166,6 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
qemu_free(s->l2_cache);
|
qemu_free(s->l2_cache);
|
||||||
qemu_free(s->cluster_cache);
|
qemu_free(s->cluster_cache);
|
||||||
qemu_free(s->cluster_data);
|
qemu_free(s->cluster_data);
|
||||||
bdrv_delete(s->hd);
|
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -271,13 +267,13 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
|
||||||
if (!allocate)
|
if (!allocate)
|
||||||
return 0;
|
return 0;
|
||||||
/* allocate a new l2 entry */
|
/* allocate a new l2 entry */
|
||||||
l2_offset = bdrv_getlength(s->hd);
|
l2_offset = bdrv_getlength(bs->file);
|
||||||
/* round to cluster size */
|
/* round to cluster size */
|
||||||
l2_offset = (l2_offset + s->cluster_size - 1) & ~(s->cluster_size - 1);
|
l2_offset = (l2_offset + s->cluster_size - 1) & ~(s->cluster_size - 1);
|
||||||
/* update the L1 entry */
|
/* update the L1 entry */
|
||||||
s->l1_table[l1_index] = l2_offset;
|
s->l1_table[l1_index] = l2_offset;
|
||||||
tmp = cpu_to_be64(l2_offset);
|
tmp = cpu_to_be64(l2_offset);
|
||||||
if (bdrv_pwrite(s->hd, s->l1_table_offset + l1_index * sizeof(tmp),
|
if (bdrv_pwrite(bs->file, s->l1_table_offset + l1_index * sizeof(tmp),
|
||||||
&tmp, sizeof(tmp)) != sizeof(tmp))
|
&tmp, sizeof(tmp)) != sizeof(tmp))
|
||||||
return 0;
|
return 0;
|
||||||
new_l2_table = 1;
|
new_l2_table = 1;
|
||||||
|
@ -306,11 +302,11 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
|
||||||
l2_table = s->l2_cache + (min_index << s->l2_bits);
|
l2_table = s->l2_cache + (min_index << s->l2_bits);
|
||||||
if (new_l2_table) {
|
if (new_l2_table) {
|
||||||
memset(l2_table, 0, s->l2_size * sizeof(uint64_t));
|
memset(l2_table, 0, s->l2_size * sizeof(uint64_t));
|
||||||
if (bdrv_pwrite(s->hd, l2_offset, l2_table, s->l2_size * sizeof(uint64_t)) !=
|
if (bdrv_pwrite(bs->file, l2_offset, l2_table, s->l2_size * sizeof(uint64_t)) !=
|
||||||
s->l2_size * sizeof(uint64_t))
|
s->l2_size * sizeof(uint64_t))
|
||||||
return 0;
|
return 0;
|
||||||
} else {
|
} else {
|
||||||
if (bdrv_pread(s->hd, l2_offset, l2_table, s->l2_size * sizeof(uint64_t)) !=
|
if (bdrv_pread(bs->file, l2_offset, l2_table, s->l2_size * sizeof(uint64_t)) !=
|
||||||
s->l2_size * sizeof(uint64_t))
|
s->l2_size * sizeof(uint64_t))
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
@ -329,22 +325,22 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
|
||||||
/* if the cluster is already compressed, we must
|
/* if the cluster is already compressed, we must
|
||||||
decompress it in the case it is not completely
|
decompress it in the case it is not completely
|
||||||
overwritten */
|
overwritten */
|
||||||
if (decompress_cluster(s, cluster_offset) < 0)
|
if (decompress_cluster(bs, cluster_offset) < 0)
|
||||||
return 0;
|
return 0;
|
||||||
cluster_offset = bdrv_getlength(s->hd);
|
cluster_offset = bdrv_getlength(bs->file);
|
||||||
cluster_offset = (cluster_offset + s->cluster_size - 1) &
|
cluster_offset = (cluster_offset + s->cluster_size - 1) &
|
||||||
~(s->cluster_size - 1);
|
~(s->cluster_size - 1);
|
||||||
/* write the cluster content */
|
/* write the cluster content */
|
||||||
if (bdrv_pwrite(s->hd, cluster_offset, s->cluster_cache, s->cluster_size) !=
|
if (bdrv_pwrite(bs->file, cluster_offset, s->cluster_cache, s->cluster_size) !=
|
||||||
s->cluster_size)
|
s->cluster_size)
|
||||||
return -1;
|
return -1;
|
||||||
} else {
|
} else {
|
||||||
cluster_offset = bdrv_getlength(s->hd);
|
cluster_offset = bdrv_getlength(bs->file);
|
||||||
if (allocate == 1) {
|
if (allocate == 1) {
|
||||||
/* round to cluster size */
|
/* round to cluster size */
|
||||||
cluster_offset = (cluster_offset + s->cluster_size - 1) &
|
cluster_offset = (cluster_offset + s->cluster_size - 1) &
|
||||||
~(s->cluster_size - 1);
|
~(s->cluster_size - 1);
|
||||||
bdrv_truncate(s->hd, cluster_offset + s->cluster_size);
|
bdrv_truncate(bs->file, cluster_offset + s->cluster_size);
|
||||||
/* if encrypted, we must initialize the cluster
|
/* if encrypted, we must initialize the cluster
|
||||||
content which won't be written */
|
content which won't be written */
|
||||||
if (s->crypt_method &&
|
if (s->crypt_method &&
|
||||||
|
@ -358,7 +354,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
|
||||||
s->cluster_data,
|
s->cluster_data,
|
||||||
s->cluster_data + 512, 1, 1,
|
s->cluster_data + 512, 1, 1,
|
||||||
&s->aes_encrypt_key);
|
&s->aes_encrypt_key);
|
||||||
if (bdrv_pwrite(s->hd, cluster_offset + i * 512,
|
if (bdrv_pwrite(bs->file, cluster_offset + i * 512,
|
||||||
s->cluster_data, 512) != 512)
|
s->cluster_data, 512) != 512)
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
@ -372,7 +368,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
|
||||||
/* update L2 table */
|
/* update L2 table */
|
||||||
tmp = cpu_to_be64(cluster_offset);
|
tmp = cpu_to_be64(cluster_offset);
|
||||||
l2_table[l2_index] = tmp;
|
l2_table[l2_index] = tmp;
|
||||||
if (bdrv_pwrite(s->hd,
|
if (bdrv_pwrite(bs->file,
|
||||||
l2_offset + l2_index * sizeof(tmp), &tmp, sizeof(tmp)) != sizeof(tmp))
|
l2_offset + l2_index * sizeof(tmp), &tmp, sizeof(tmp)) != sizeof(tmp))
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
@ -422,8 +418,9 @@ static int decompress_buffer(uint8_t *out_buf, int out_buf_size,
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
static int decompress_cluster(BDRVQcowState *s, uint64_t cluster_offset)
|
static int decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset)
|
||||||
{
|
{
|
||||||
|
BDRVQcowState *s = bs->opaque;
|
||||||
int ret, csize;
|
int ret, csize;
|
||||||
uint64_t coffset;
|
uint64_t coffset;
|
||||||
|
|
||||||
|
@ -431,7 +428,7 @@ static int decompress_cluster(BDRVQcowState *s, uint64_t cluster_offset)
|
||||||
if (s->cluster_cache_offset != coffset) {
|
if (s->cluster_cache_offset != coffset) {
|
||||||
csize = cluster_offset >> (63 - s->cluster_bits);
|
csize = cluster_offset >> (63 - s->cluster_bits);
|
||||||
csize &= (s->cluster_size - 1);
|
csize &= (s->cluster_size - 1);
|
||||||
ret = bdrv_pread(s->hd, coffset, s->cluster_data, csize);
|
ret = bdrv_pread(bs->file, coffset, s->cluster_data, csize);
|
||||||
if (ret != csize)
|
if (ret != csize)
|
||||||
return -1;
|
return -1;
|
||||||
if (decompress_buffer(s->cluster_cache, s->cluster_size,
|
if (decompress_buffer(s->cluster_cache, s->cluster_size,
|
||||||
|
@ -468,11 +465,11 @@ static int qcow_read(BlockDriverState *bs, int64_t sector_num,
|
||||||
memset(buf, 0, 512 * n);
|
memset(buf, 0, 512 * n);
|
||||||
}
|
}
|
||||||
} else if (cluster_offset & QCOW_OFLAG_COMPRESSED) {
|
} else if (cluster_offset & QCOW_OFLAG_COMPRESSED) {
|
||||||
if (decompress_cluster(s, cluster_offset) < 0)
|
if (decompress_cluster(bs, cluster_offset) < 0)
|
||||||
return -1;
|
return -1;
|
||||||
memcpy(buf, s->cluster_cache + index_in_cluster * 512, 512 * n);
|
memcpy(buf, s->cluster_cache + index_in_cluster * 512, 512 * n);
|
||||||
} else {
|
} else {
|
||||||
ret = bdrv_pread(s->hd, cluster_offset + index_in_cluster * 512, buf, n * 512);
|
ret = bdrv_pread(bs->file, cluster_offset + index_in_cluster * 512, buf, n * 512);
|
||||||
if (ret != n * 512)
|
if (ret != n * 512)
|
||||||
return -1;
|
return -1;
|
||||||
if (s->crypt_method) {
|
if (s->crypt_method) {
|
||||||
|
@ -601,7 +598,7 @@ static void qcow_aio_read_cb(void *opaque, int ret)
|
||||||
}
|
}
|
||||||
} else if (acb->cluster_offset & QCOW_OFLAG_COMPRESSED) {
|
} else if (acb->cluster_offset & QCOW_OFLAG_COMPRESSED) {
|
||||||
/* add AIO support for compressed blocks ? */
|
/* add AIO support for compressed blocks ? */
|
||||||
if (decompress_cluster(s, acb->cluster_offset) < 0)
|
if (decompress_cluster(bs, acb->cluster_offset) < 0)
|
||||||
goto done;
|
goto done;
|
||||||
memcpy(acb->buf,
|
memcpy(acb->buf,
|
||||||
s->cluster_cache + index_in_cluster * 512, 512 * acb->n);
|
s->cluster_cache + index_in_cluster * 512, 512 * acb->n);
|
||||||
|
@ -614,7 +611,7 @@ static void qcow_aio_read_cb(void *opaque, int ret)
|
||||||
acb->hd_iov.iov_base = (void *)acb->buf;
|
acb->hd_iov.iov_base = (void *)acb->buf;
|
||||||
acb->hd_iov.iov_len = acb->n * 512;
|
acb->hd_iov.iov_len = acb->n * 512;
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
acb->hd_aiocb = bdrv_aio_readv(s->hd,
|
acb->hd_aiocb = bdrv_aio_readv(bs->file,
|
||||||
(acb->cluster_offset >> 9) + index_in_cluster,
|
(acb->cluster_offset >> 9) + index_in_cluster,
|
||||||
&acb->hd_qiov, acb->n, qcow_aio_read_cb, acb);
|
&acb->hd_qiov, acb->n, qcow_aio_read_cb, acb);
|
||||||
if (acb->hd_aiocb == NULL)
|
if (acb->hd_aiocb == NULL)
|
||||||
|
@ -699,7 +696,7 @@ static void qcow_aio_write_cb(void *opaque, int ret)
|
||||||
acb->hd_iov.iov_base = (void *)src_buf;
|
acb->hd_iov.iov_base = (void *)src_buf;
|
||||||
acb->hd_iov.iov_len = acb->n * 512;
|
acb->hd_iov.iov_len = acb->n * 512;
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
acb->hd_aiocb = bdrv_aio_writev(s->hd,
|
acb->hd_aiocb = bdrv_aio_writev(bs->file,
|
||||||
(cluster_offset >> 9) + index_in_cluster,
|
(cluster_offset >> 9) + index_in_cluster,
|
||||||
&acb->hd_qiov, acb->n,
|
&acb->hd_qiov, acb->n,
|
||||||
qcow_aio_write_cb, acb);
|
qcow_aio_write_cb, acb);
|
||||||
|
@ -739,7 +736,6 @@ static void qcow_close(BlockDriverState *bs)
|
||||||
qemu_free(s->l2_cache);
|
qemu_free(s->l2_cache);
|
||||||
qemu_free(s->cluster_cache);
|
qemu_free(s->cluster_cache);
|
||||||
qemu_free(s->cluster_data);
|
qemu_free(s->cluster_data);
|
||||||
bdrv_delete(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static int qcow_create(const char *filename, QEMUOptionParameter *options)
|
static int qcow_create(const char *filename, QEMUOptionParameter *options)
|
||||||
|
@ -839,9 +835,9 @@ static int qcow_make_empty(BlockDriverState *bs)
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
memset(s->l1_table, 0, l1_length);
|
memset(s->l1_table, 0, l1_length);
|
||||||
if (bdrv_pwrite(s->hd, s->l1_table_offset, s->l1_table, l1_length) < 0)
|
if (bdrv_pwrite(bs->file, s->l1_table_offset, s->l1_table, l1_length) < 0)
|
||||||
return -1;
|
return -1;
|
||||||
ret = bdrv_truncate(s->hd, s->l1_table_offset + l1_length);
|
ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length);
|
||||||
if (ret < 0)
|
if (ret < 0)
|
||||||
return ret;
|
return ret;
|
||||||
|
|
||||||
|
@ -902,7 +898,7 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
||||||
cluster_offset = get_cluster_offset(bs, sector_num << 9, 2,
|
cluster_offset = get_cluster_offset(bs, sector_num << 9, 2,
|
||||||
out_len, 0, 0);
|
out_len, 0, 0);
|
||||||
cluster_offset &= s->cluster_offset_mask;
|
cluster_offset &= s->cluster_offset_mask;
|
||||||
if (bdrv_pwrite(s->hd, cluster_offset, out_buf, out_len) != out_len) {
|
if (bdrv_pwrite(bs->file, cluster_offset, out_buf, out_len) != out_len) {
|
||||||
qemu_free(out_buf);
|
qemu_free(out_buf);
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
@ -914,16 +910,13 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
||||||
|
|
||||||
static void qcow_flush(BlockDriverState *bs)
|
static void qcow_flush(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
bdrv_flush(bs->file);
|
||||||
bdrv_flush(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static BlockDriverAIOCB *qcow_aio_flush(BlockDriverState *bs,
|
static BlockDriverAIOCB *qcow_aio_flush(BlockDriverState *bs,
|
||||||
BlockDriverCompletionFunc *cb, void *opaque)
|
BlockDriverCompletionFunc *cb, void *opaque)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
return bdrv_aio_flush(bs->file, cb, opaque);
|
||||||
|
|
||||||
return bdrv_aio_flush(s->hd, cb, opaque);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static int qcow_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
static int qcow_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
||||||
|
|
|
@ -54,27 +54,27 @@ int qcow2_grow_l1_table(BlockDriverState *bs, int min_size)
|
||||||
memcpy(new_l1_table, s->l1_table, s->l1_size * sizeof(uint64_t));
|
memcpy(new_l1_table, s->l1_table, s->l1_size * sizeof(uint64_t));
|
||||||
|
|
||||||
/* write new table (align to cluster) */
|
/* write new table (align to cluster) */
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_L1_GROW_ALLOC_TABLE);
|
BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_ALLOC_TABLE);
|
||||||
new_l1_table_offset = qcow2_alloc_clusters(bs, new_l1_size2);
|
new_l1_table_offset = qcow2_alloc_clusters(bs, new_l1_size2);
|
||||||
if (new_l1_table_offset < 0) {
|
if (new_l1_table_offset < 0) {
|
||||||
qemu_free(new_l1_table);
|
qemu_free(new_l1_table);
|
||||||
return new_l1_table_offset;
|
return new_l1_table_offset;
|
||||||
}
|
}
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_L1_GROW_WRITE_TABLE);
|
BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_WRITE_TABLE);
|
||||||
for(i = 0; i < s->l1_size; i++)
|
for(i = 0; i < s->l1_size; i++)
|
||||||
new_l1_table[i] = cpu_to_be64(new_l1_table[i]);
|
new_l1_table[i] = cpu_to_be64(new_l1_table[i]);
|
||||||
ret = bdrv_pwrite(s->hd, new_l1_table_offset, new_l1_table, new_l1_size2);
|
ret = bdrv_pwrite(bs->file, new_l1_table_offset, new_l1_table, new_l1_size2);
|
||||||
if (ret != new_l1_size2)
|
if (ret != new_l1_size2)
|
||||||
goto fail;
|
goto fail;
|
||||||
for(i = 0; i < s->l1_size; i++)
|
for(i = 0; i < s->l1_size; i++)
|
||||||
new_l1_table[i] = be64_to_cpu(new_l1_table[i]);
|
new_l1_table[i] = be64_to_cpu(new_l1_table[i]);
|
||||||
|
|
||||||
/* set new table */
|
/* set new table */
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_L1_GROW_ACTIVATE_TABLE);
|
BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_ACTIVATE_TABLE);
|
||||||
cpu_to_be32w((uint32_t*)data, new_l1_size);
|
cpu_to_be32w((uint32_t*)data, new_l1_size);
|
||||||
cpu_to_be64w((uint64_t*)(data + 4), new_l1_table_offset);
|
cpu_to_be64w((uint64_t*)(data + 4), new_l1_table_offset);
|
||||||
ret = bdrv_pwrite(s->hd, offsetof(QCowHeader, l1_size), data,sizeof(data));
|
ret = bdrv_pwrite(bs->file, offsetof(QCowHeader, l1_size), data,sizeof(data));
|
||||||
if (ret != sizeof(data)) {
|
if (ret != sizeof(data)) {
|
||||||
goto fail;
|
goto fail;
|
||||||
}
|
}
|
||||||
|
@ -174,8 +174,8 @@ static uint64_t *l2_load(BlockDriverState *bs, uint64_t l2_offset)
|
||||||
min_index = l2_cache_new_entry(bs);
|
min_index = l2_cache_new_entry(bs);
|
||||||
l2_table = s->l2_cache + (min_index << s->l2_bits);
|
l2_table = s->l2_cache + (min_index << s->l2_bits);
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_L2_LOAD);
|
BLKDBG_EVENT(bs->file, BLKDBG_L2_LOAD);
|
||||||
if (bdrv_pread(s->hd, l2_offset, l2_table, s->l2_size * sizeof(uint64_t)) !=
|
if (bdrv_pread(bs->file, l2_offset, l2_table, s->l2_size * sizeof(uint64_t)) !=
|
||||||
s->l2_size * sizeof(uint64_t))
|
s->l2_size * sizeof(uint64_t))
|
||||||
return NULL;
|
return NULL;
|
||||||
s->l2_cache_offsets[min_index] = l2_offset;
|
s->l2_cache_offsets[min_index] = l2_offset;
|
||||||
|
@ -189,8 +189,9 @@ static uint64_t *l2_load(BlockDriverState *bs, uint64_t l2_offset)
|
||||||
* and we really don't want bdrv_pread to perform a read-modify-write)
|
* and we really don't want bdrv_pread to perform a read-modify-write)
|
||||||
*/
|
*/
|
||||||
#define L1_ENTRIES_PER_SECTOR (512 / 8)
|
#define L1_ENTRIES_PER_SECTOR (512 / 8)
|
||||||
static int write_l1_entry(BDRVQcowState *s, int l1_index)
|
static int write_l1_entry(BlockDriverState *bs, int l1_index)
|
||||||
{
|
{
|
||||||
|
BDRVQcowState *s = bs->opaque;
|
||||||
uint64_t buf[L1_ENTRIES_PER_SECTOR];
|
uint64_t buf[L1_ENTRIES_PER_SECTOR];
|
||||||
int l1_start_index;
|
int l1_start_index;
|
||||||
int i, ret;
|
int i, ret;
|
||||||
|
@ -200,8 +201,8 @@ static int write_l1_entry(BDRVQcowState *s, int l1_index)
|
||||||
buf[i] = cpu_to_be64(s->l1_table[l1_start_index + i]);
|
buf[i] = cpu_to_be64(s->l1_table[l1_start_index + i]);
|
||||||
}
|
}
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_L1_UPDATE);
|
BLKDBG_EVENT(bs->file, BLKDBG_L1_UPDATE);
|
||||||
ret = bdrv_pwrite(s->hd, s->l1_table_offset + 8 * l1_start_index,
|
ret = bdrv_pwrite(bs->file, s->l1_table_offset + 8 * l1_start_index,
|
||||||
buf, sizeof(buf));
|
buf, sizeof(buf));
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
|
@ -241,7 +242,7 @@ static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
|
||||||
/* update the L1 entry */
|
/* update the L1 entry */
|
||||||
|
|
||||||
s->l1_table[l1_index] = l2_offset | QCOW_OFLAG_COPIED;
|
s->l1_table[l1_index] = l2_offset | QCOW_OFLAG_COPIED;
|
||||||
ret = write_l1_entry(s, l1_index);
|
ret = write_l1_entry(bs, l1_index);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
@ -256,16 +257,16 @@ static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
|
||||||
memset(l2_table, 0, s->l2_size * sizeof(uint64_t));
|
memset(l2_table, 0, s->l2_size * sizeof(uint64_t));
|
||||||
} else {
|
} else {
|
||||||
/* if there was an old l2 table, read it from the disk */
|
/* if there was an old l2 table, read it from the disk */
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_L2_ALLOC_COW_READ);
|
BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_COW_READ);
|
||||||
ret = bdrv_pread(s->hd, old_l2_offset, l2_table,
|
ret = bdrv_pread(bs->file, old_l2_offset, l2_table,
|
||||||
s->l2_size * sizeof(uint64_t));
|
s->l2_size * sizeof(uint64_t));
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
/* write the l2 table to the file */
|
/* write the l2 table to the file */
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_L2_ALLOC_WRITE);
|
BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_WRITE);
|
||||||
ret = bdrv_pwrite(s->hd, l2_offset, l2_table,
|
ret = bdrv_pwrite(bs->file, l2_offset, l2_table,
|
||||||
s->l2_size * sizeof(uint64_t));
|
s->l2_size * sizeof(uint64_t));
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
|
@ -348,7 +349,7 @@ static int qcow_read(BlockDriverState *bs, int64_t sector_num,
|
||||||
/* read from the base image */
|
/* read from the base image */
|
||||||
n1 = qcow2_backing_read1(bs->backing_hd, sector_num, buf, n);
|
n1 = qcow2_backing_read1(bs->backing_hd, sector_num, buf, n);
|
||||||
if (n1 > 0) {
|
if (n1 > 0) {
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_READ_BACKING);
|
BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING);
|
||||||
ret = bdrv_read(bs->backing_hd, sector_num, buf, n1);
|
ret = bdrv_read(bs->backing_hd, sector_num, buf, n1);
|
||||||
if (ret < 0)
|
if (ret < 0)
|
||||||
return -1;
|
return -1;
|
||||||
|
@ -357,12 +358,12 @@ static int qcow_read(BlockDriverState *bs, int64_t sector_num,
|
||||||
memset(buf, 0, 512 * n);
|
memset(buf, 0, 512 * n);
|
||||||
}
|
}
|
||||||
} else if (cluster_offset & QCOW_OFLAG_COMPRESSED) {
|
} else if (cluster_offset & QCOW_OFLAG_COMPRESSED) {
|
||||||
if (qcow2_decompress_cluster(s, cluster_offset) < 0)
|
if (qcow2_decompress_cluster(bs, cluster_offset) < 0)
|
||||||
return -1;
|
return -1;
|
||||||
memcpy(buf, s->cluster_cache + index_in_cluster * 512, 512 * n);
|
memcpy(buf, s->cluster_cache + index_in_cluster * 512, 512 * n);
|
||||||
} else {
|
} else {
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_READ);
|
BLKDBG_EVENT(bs->file, BLKDBG_READ);
|
||||||
ret = bdrv_pread(s->hd, cluster_offset + index_in_cluster * 512, buf, n * 512);
|
ret = bdrv_pread(bs->file, cluster_offset + index_in_cluster * 512, buf, n * 512);
|
||||||
if (ret != n * 512)
|
if (ret != n * 512)
|
||||||
return -1;
|
return -1;
|
||||||
if (s->crypt_method) {
|
if (s->crypt_method) {
|
||||||
|
@ -386,7 +387,7 @@ static int copy_sectors(BlockDriverState *bs, uint64_t start_sect,
|
||||||
n = n_end - n_start;
|
n = n_end - n_start;
|
||||||
if (n <= 0)
|
if (n <= 0)
|
||||||
return 0;
|
return 0;
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_COW_READ);
|
BLKDBG_EVENT(bs->file, BLKDBG_COW_READ);
|
||||||
ret = qcow_read(bs, start_sect + n_start, s->cluster_data, n);
|
ret = qcow_read(bs, start_sect + n_start, s->cluster_data, n);
|
||||||
if (ret < 0)
|
if (ret < 0)
|
||||||
return ret;
|
return ret;
|
||||||
|
@ -396,8 +397,8 @@ static int copy_sectors(BlockDriverState *bs, uint64_t start_sect,
|
||||||
s->cluster_data, n, 1,
|
s->cluster_data, n, 1,
|
||||||
&s->aes_encrypt_key);
|
&s->aes_encrypt_key);
|
||||||
}
|
}
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_COW_WRITE);
|
BLKDBG_EVENT(bs->file, BLKDBG_COW_WRITE);
|
||||||
ret = bdrv_write(s->hd, (cluster_offset >> 9) + n_start,
|
ret = bdrv_write(bs->file, (cluster_offset >> 9) + n_start,
|
||||||
s->cluster_data, n);
|
s->cluster_data, n);
|
||||||
if (ret < 0)
|
if (ret < 0)
|
||||||
return ret;
|
return ret;
|
||||||
|
@ -610,9 +611,9 @@ uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
|
||||||
|
|
||||||
/* compressed clusters never have the copied flag */
|
/* compressed clusters never have the copied flag */
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_L2_UPDATE_COMPRESSED);
|
BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE_COMPRESSED);
|
||||||
l2_table[l2_index] = cpu_to_be64(cluster_offset);
|
l2_table[l2_index] = cpu_to_be64(cluster_offset);
|
||||||
if (bdrv_pwrite(s->hd,
|
if (bdrv_pwrite(bs->file,
|
||||||
l2_offset + l2_index * sizeof(uint64_t),
|
l2_offset + l2_index * sizeof(uint64_t),
|
||||||
l2_table + l2_index,
|
l2_table + l2_index,
|
||||||
sizeof(uint64_t)) != sizeof(uint64_t))
|
sizeof(uint64_t)) != sizeof(uint64_t))
|
||||||
|
@ -626,7 +627,7 @@ uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
|
||||||
* read-modify-write in bdrv_pwrite
|
* read-modify-write in bdrv_pwrite
|
||||||
*/
|
*/
|
||||||
#define L2_ENTRIES_PER_SECTOR (512 / 8)
|
#define L2_ENTRIES_PER_SECTOR (512 / 8)
|
||||||
static int write_l2_entries(BDRVQcowState *s, uint64_t *l2_table,
|
static int write_l2_entries(BlockDriverState *bs, uint64_t *l2_table,
|
||||||
uint64_t l2_offset, int l2_index, int num)
|
uint64_t l2_offset, int l2_index, int num)
|
||||||
{
|
{
|
||||||
int l2_start_index = l2_index & ~(L1_ENTRIES_PER_SECTOR - 1);
|
int l2_start_index = l2_index & ~(L1_ENTRIES_PER_SECTOR - 1);
|
||||||
|
@ -635,8 +636,8 @@ static int write_l2_entries(BDRVQcowState *s, uint64_t *l2_table,
|
||||||
size_t len = end_offset - start_offset;
|
size_t len = end_offset - start_offset;
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_L2_UPDATE);
|
BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE);
|
||||||
ret = bdrv_pwrite(s->hd, l2_offset + start_offset,
|
ret = bdrv_pwrite(bs->file, l2_offset + start_offset,
|
||||||
&l2_table[l2_start_index], len);
|
&l2_table[l2_start_index], len);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
|
@ -693,7 +694,7 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m)
|
||||||
(i << s->cluster_bits)) | QCOW_OFLAG_COPIED);
|
(i << s->cluster_bits)) | QCOW_OFLAG_COPIED);
|
||||||
}
|
}
|
||||||
|
|
||||||
ret = write_l2_entries(s, l2_table, l2_offset, l2_index, m->nb_clusters);
|
ret = write_l2_entries(bs, l2_table, l2_offset, l2_index, m->nb_clusters);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
goto err;
|
goto err;
|
||||||
}
|
}
|
||||||
|
@ -877,8 +878,9 @@ static int decompress_buffer(uint8_t *out_buf, int out_buf_size,
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
int qcow2_decompress_cluster(BDRVQcowState *s, uint64_t cluster_offset)
|
int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset)
|
||||||
{
|
{
|
||||||
|
BDRVQcowState *s = bs->opaque;
|
||||||
int ret, csize, nb_csectors, sector_offset;
|
int ret, csize, nb_csectors, sector_offset;
|
||||||
uint64_t coffset;
|
uint64_t coffset;
|
||||||
|
|
||||||
|
@ -887,8 +889,8 @@ int qcow2_decompress_cluster(BDRVQcowState *s, uint64_t cluster_offset)
|
||||||
nb_csectors = ((cluster_offset >> s->csize_shift) & s->csize_mask) + 1;
|
nb_csectors = ((cluster_offset >> s->csize_shift) & s->csize_mask) + 1;
|
||||||
sector_offset = coffset & 511;
|
sector_offset = coffset & 511;
|
||||||
csize = nb_csectors * 512 - sector_offset;
|
csize = nb_csectors * 512 - sector_offset;
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_READ_COMPRESSED);
|
BLKDBG_EVENT(bs->file, BLKDBG_READ_COMPRESSED);
|
||||||
ret = bdrv_read(s->hd, coffset >> 9, s->cluster_data, nb_csectors);
|
ret = bdrv_read(bs->file, coffset >> 9, s->cluster_data, nb_csectors);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
|
@ -34,16 +34,17 @@ static int QEMU_WARN_UNUSED_RESULT update_refcount(BlockDriverState *bs,
|
||||||
|
|
||||||
static int cache_refcount_updates = 0;
|
static int cache_refcount_updates = 0;
|
||||||
|
|
||||||
static int write_refcount_block(BDRVQcowState *s)
|
static int write_refcount_block(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
|
BDRVQcowState *s = bs->opaque;
|
||||||
size_t size = s->cluster_size;
|
size_t size = s->cluster_size;
|
||||||
|
|
||||||
if (s->refcount_block_cache_offset == 0) {
|
if (s->refcount_block_cache_offset == 0) {
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFBLOCK_UPDATE);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_UPDATE);
|
||||||
if (bdrv_pwrite(s->hd, s->refcount_block_cache_offset,
|
if (bdrv_pwrite(bs->file, s->refcount_block_cache_offset,
|
||||||
s->refcount_block_cache, size) != size)
|
s->refcount_block_cache, size) != size)
|
||||||
{
|
{
|
||||||
return -EIO;
|
return -EIO;
|
||||||
|
@ -64,8 +65,8 @@ int qcow2_refcount_init(BlockDriverState *bs)
|
||||||
refcount_table_size2 = s->refcount_table_size * sizeof(uint64_t);
|
refcount_table_size2 = s->refcount_table_size * sizeof(uint64_t);
|
||||||
s->refcount_table = qemu_malloc(refcount_table_size2);
|
s->refcount_table = qemu_malloc(refcount_table_size2);
|
||||||
if (s->refcount_table_size > 0) {
|
if (s->refcount_table_size > 0) {
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFTABLE_LOAD);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFTABLE_LOAD);
|
||||||
ret = bdrv_pread(s->hd, s->refcount_table_offset,
|
ret = bdrv_pread(bs->file, s->refcount_table_offset,
|
||||||
s->refcount_table, refcount_table_size2);
|
s->refcount_table, refcount_table_size2);
|
||||||
if (ret != refcount_table_size2)
|
if (ret != refcount_table_size2)
|
||||||
goto fail;
|
goto fail;
|
||||||
|
@ -92,11 +93,11 @@ static int load_refcount_block(BlockDriverState *bs,
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
if (cache_refcount_updates) {
|
if (cache_refcount_updates) {
|
||||||
write_refcount_block(s);
|
write_refcount_block(bs);
|
||||||
}
|
}
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFBLOCK_LOAD);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_LOAD);
|
||||||
ret = bdrv_pread(s->hd, refcount_block_offset, s->refcount_block_cache,
|
ret = bdrv_pread(bs->file, refcount_block_offset, s->refcount_block_cache,
|
||||||
s->cluster_size);
|
s->cluster_size);
|
||||||
if (ret != s->cluster_size)
|
if (ret != s->cluster_size)
|
||||||
return -EIO;
|
return -EIO;
|
||||||
|
@ -167,7 +168,7 @@ static int64_t alloc_refcount_block(BlockDriverState *bs, int64_t cluster_index)
|
||||||
unsigned int refcount_table_index;
|
unsigned int refcount_table_index;
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFBLOCK_ALLOC);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC);
|
||||||
|
|
||||||
/* Find the refcount block for the given cluster */
|
/* Find the refcount block for the given cluster */
|
||||||
refcount_table_index = cluster_index >> (s->cluster_bits - REFCOUNT_SHIFT);
|
refcount_table_index = cluster_index >> (s->cluster_bits - REFCOUNT_SHIFT);
|
||||||
|
@ -212,7 +213,7 @@ static int64_t alloc_refcount_block(BlockDriverState *bs, int64_t cluster_index)
|
||||||
*/
|
*/
|
||||||
|
|
||||||
if (cache_refcount_updates) {
|
if (cache_refcount_updates) {
|
||||||
ret = write_refcount_block(s);
|
ret = write_refcount_block(bs);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
@ -244,8 +245,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs, int64_t cluster_index)
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Now the new refcount block needs to be written to disk */
|
/* Now the new refcount block needs to be written to disk */
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFBLOCK_ALLOC_WRITE);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_WRITE);
|
||||||
ret = bdrv_pwrite(s->hd, new_block, s->refcount_block_cache,
|
ret = bdrv_pwrite(bs->file, new_block, s->refcount_block_cache,
|
||||||
s->cluster_size);
|
s->cluster_size);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
goto fail_block;
|
goto fail_block;
|
||||||
|
@ -254,8 +255,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs, int64_t cluster_index)
|
||||||
/* If the refcount table is big enough, just hook the block up there */
|
/* If the refcount table is big enough, just hook the block up there */
|
||||||
if (refcount_table_index < s->refcount_table_size) {
|
if (refcount_table_index < s->refcount_table_size) {
|
||||||
uint64_t data64 = cpu_to_be64(new_block);
|
uint64_t data64 = cpu_to_be64(new_block);
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFBLOCK_ALLOC_HOOKUP);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_HOOKUP);
|
||||||
ret = bdrv_pwrite(s->hd,
|
ret = bdrv_pwrite(bs->file,
|
||||||
s->refcount_table_offset + refcount_table_index * sizeof(uint64_t),
|
s->refcount_table_offset + refcount_table_index * sizeof(uint64_t),
|
||||||
&data64, sizeof(data64));
|
&data64, sizeof(data64));
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
|
@ -277,7 +278,7 @@ static int64_t alloc_refcount_block(BlockDriverState *bs, int64_t cluster_index)
|
||||||
* refcount table at once without producing an inconsistent state in
|
* refcount table at once without producing an inconsistent state in
|
||||||
* between.
|
* between.
|
||||||
*/
|
*/
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFTABLE_GROW);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFTABLE_GROW);
|
||||||
|
|
||||||
/* Calculate the number of refcount blocks needed so far */
|
/* Calculate the number of refcount blocks needed so far */
|
||||||
uint64_t refcount_block_clusters = 1 << (s->cluster_bits - REFCOUNT_SHIFT);
|
uint64_t refcount_block_clusters = 1 << (s->cluster_bits - REFCOUNT_SHIFT);
|
||||||
|
@ -334,8 +335,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs, int64_t cluster_index)
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Write refcount blocks to disk */
|
/* Write refcount blocks to disk */
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS);
|
||||||
ret = bdrv_pwrite(s->hd, meta_offset, new_blocks,
|
ret = bdrv_pwrite(bs->file, meta_offset, new_blocks,
|
||||||
blocks_clusters * s->cluster_size);
|
blocks_clusters * s->cluster_size);
|
||||||
qemu_free(new_blocks);
|
qemu_free(new_blocks);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
|
@ -347,8 +348,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs, int64_t cluster_index)
|
||||||
cpu_to_be64s(&new_table[i]);
|
cpu_to_be64s(&new_table[i]);
|
||||||
}
|
}
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE);
|
||||||
ret = bdrv_pwrite(s->hd, table_offset, new_table,
|
ret = bdrv_pwrite(bs->file, table_offset, new_table,
|
||||||
table_size * sizeof(uint64_t));
|
table_size * sizeof(uint64_t));
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
goto fail_table;
|
goto fail_table;
|
||||||
|
@ -362,8 +363,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs, int64_t cluster_index)
|
||||||
uint8_t data[12];
|
uint8_t data[12];
|
||||||
cpu_to_be64w((uint64_t*)data, table_offset);
|
cpu_to_be64w((uint64_t*)data, table_offset);
|
||||||
cpu_to_be32w((uint32_t*)(data + 8), table_clusters);
|
cpu_to_be32w((uint32_t*)(data + 8), table_clusters);
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE);
|
||||||
ret = bdrv_pwrite(s->hd, offsetof(QCowHeader, refcount_table_offset),
|
ret = bdrv_pwrite(bs->file, offsetof(QCowHeader, refcount_table_offset),
|
||||||
data, sizeof(data));
|
data, sizeof(data));
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
goto fail_table;
|
goto fail_table;
|
||||||
|
@ -398,9 +399,10 @@ fail_block:
|
||||||
}
|
}
|
||||||
|
|
||||||
#define REFCOUNTS_PER_SECTOR (512 >> REFCOUNT_SHIFT)
|
#define REFCOUNTS_PER_SECTOR (512 >> REFCOUNT_SHIFT)
|
||||||
static int write_refcount_block_entries(BDRVQcowState *s,
|
static int write_refcount_block_entries(BlockDriverState *bs,
|
||||||
int64_t refcount_block_offset, int first_index, int last_index)
|
int64_t refcount_block_offset, int first_index, int last_index)
|
||||||
{
|
{
|
||||||
|
BDRVQcowState *s = bs->opaque;
|
||||||
size_t size;
|
size_t size;
|
||||||
|
|
||||||
if (cache_refcount_updates) {
|
if (cache_refcount_updates) {
|
||||||
|
@ -412,8 +414,8 @@ static int write_refcount_block_entries(BDRVQcowState *s,
|
||||||
& ~(REFCOUNTS_PER_SECTOR - 1);
|
& ~(REFCOUNTS_PER_SECTOR - 1);
|
||||||
|
|
||||||
size = (last_index - first_index) << REFCOUNT_SHIFT;
|
size = (last_index - first_index) << REFCOUNT_SHIFT;
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_REFBLOCK_UPDATE_PART);
|
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_UPDATE_PART);
|
||||||
if (bdrv_pwrite(s->hd,
|
if (bdrv_pwrite(bs->file,
|
||||||
refcount_block_offset + (first_index << REFCOUNT_SHIFT),
|
refcount_block_offset + (first_index << REFCOUNT_SHIFT),
|
||||||
&s->refcount_block_cache[first_index], size) != size)
|
&s->refcount_block_cache[first_index], size) != size)
|
||||||
{
|
{
|
||||||
|
@ -458,7 +460,7 @@ static int QEMU_WARN_UNUSED_RESULT update_refcount(BlockDriverState *bs,
|
||||||
table_index = cluster_index >> (s->cluster_bits - REFCOUNT_SHIFT);
|
table_index = cluster_index >> (s->cluster_bits - REFCOUNT_SHIFT);
|
||||||
if ((old_table_index >= 0) && (table_index != old_table_index)) {
|
if ((old_table_index >= 0) && (table_index != old_table_index)) {
|
||||||
|
|
||||||
if (write_refcount_block_entries(s, refcount_block_offset,
|
if (write_refcount_block_entries(bs, refcount_block_offset,
|
||||||
first_index, last_index) < 0)
|
first_index, last_index) < 0)
|
||||||
{
|
{
|
||||||
return -EIO;
|
return -EIO;
|
||||||
|
@ -503,7 +505,7 @@ fail:
|
||||||
|
|
||||||
/* Write last changed block to disk */
|
/* Write last changed block to disk */
|
||||||
if (refcount_block_offset != 0) {
|
if (refcount_block_offset != 0) {
|
||||||
if (write_refcount_block_entries(s, refcount_block_offset,
|
if (write_refcount_block_entries(bs, refcount_block_offset,
|
||||||
first_index, last_index) < 0)
|
first_index, last_index) < 0)
|
||||||
{
|
{
|
||||||
return ret < 0 ? ret : -EIO;
|
return ret < 0 ? ret : -EIO;
|
||||||
|
@ -554,8 +556,8 @@ static int64_t alloc_clusters_noref(BlockDriverState *bs, int64_t size)
|
||||||
nb_clusters = size_to_clusters(s, size);
|
nb_clusters = size_to_clusters(s, size);
|
||||||
retry:
|
retry:
|
||||||
for(i = 0; i < nb_clusters; i++) {
|
for(i = 0; i < nb_clusters; i++) {
|
||||||
int64_t i = s->free_cluster_index++;
|
int64_t next_cluster_index = s->free_cluster_index++;
|
||||||
if (get_refcount(bs, i) != 0)
|
if (get_refcount(bs, next_cluster_index) != 0)
|
||||||
goto retry;
|
goto retry;
|
||||||
}
|
}
|
||||||
#ifdef DEBUG_ALLOC2
|
#ifdef DEBUG_ALLOC2
|
||||||
|
@ -568,11 +570,10 @@ retry:
|
||||||
|
|
||||||
int64_t qcow2_alloc_clusters(BlockDriverState *bs, int64_t size)
|
int64_t qcow2_alloc_clusters(BlockDriverState *bs, int64_t size)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
|
||||||
int64_t offset;
|
int64_t offset;
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_CLUSTER_ALLOC);
|
BLKDBG_EVENT(bs->file, BLKDBG_CLUSTER_ALLOC);
|
||||||
offset = alloc_clusters_noref(bs, size);
|
offset = alloc_clusters_noref(bs, size);
|
||||||
ret = update_refcount(bs, offset, size, 1);
|
ret = update_refcount(bs, offset, size, 1);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
|
@ -589,7 +590,7 @@ int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
|
||||||
int64_t offset, cluster_offset;
|
int64_t offset, cluster_offset;
|
||||||
int free_in_cluster;
|
int free_in_cluster;
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_CLUSTER_ALLOC_BYTES);
|
BLKDBG_EVENT(bs->file, BLKDBG_CLUSTER_ALLOC_BYTES);
|
||||||
assert(size > 0 && size <= s->cluster_size);
|
assert(size > 0 && size <= s->cluster_size);
|
||||||
if (s->free_byte_offset == 0) {
|
if (s->free_byte_offset == 0) {
|
||||||
s->free_byte_offset = qcow2_alloc_clusters(bs, s->cluster_size);
|
s->free_byte_offset = qcow2_alloc_clusters(bs, s->cluster_size);
|
||||||
|
@ -631,14 +632,13 @@ int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
|
||||||
void qcow2_free_clusters(BlockDriverState *bs,
|
void qcow2_free_clusters(BlockDriverState *bs,
|
||||||
int64_t offset, int64_t size)
|
int64_t offset, int64_t size)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_CLUSTER_FREE);
|
BLKDBG_EVENT(bs->file, BLKDBG_CLUSTER_FREE);
|
||||||
ret = update_refcount(bs, offset, size, -1);
|
ret = update_refcount(bs, offset, size, -1);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
fprintf(stderr, "qcow2_free_clusters failed: %s\n", strerror(-ret));
|
fprintf(stderr, "qcow2_free_clusters failed: %s\n", strerror(-ret));
|
||||||
abort();
|
/* TODO Remember the clusters to free them later and avoid leaking */
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -718,7 +718,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
|
||||||
l1_table = NULL;
|
l1_table = NULL;
|
||||||
}
|
}
|
||||||
l1_allocated = 1;
|
l1_allocated = 1;
|
||||||
if (bdrv_pread(s->hd, l1_table_offset,
|
if (bdrv_pread(bs->file, l1_table_offset,
|
||||||
l1_table, l1_size2) != l1_size2)
|
l1_table, l1_size2) != l1_size2)
|
||||||
goto fail;
|
goto fail;
|
||||||
for(i = 0;i < l1_size; i++)
|
for(i = 0;i < l1_size; i++)
|
||||||
|
@ -738,7 +738,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
|
||||||
old_l2_offset = l2_offset;
|
old_l2_offset = l2_offset;
|
||||||
l2_offset &= ~QCOW_OFLAG_COPIED;
|
l2_offset &= ~QCOW_OFLAG_COPIED;
|
||||||
l2_modified = 0;
|
l2_modified = 0;
|
||||||
if (bdrv_pread(s->hd, l2_offset, l2_table, l2_size) != l2_size)
|
if (bdrv_pread(bs->file, l2_offset, l2_table, l2_size) != l2_size)
|
||||||
goto fail;
|
goto fail;
|
||||||
for(j = 0; j < s->l2_size; j++) {
|
for(j = 0; j < s->l2_size; j++) {
|
||||||
offset = be64_to_cpu(l2_table[j]);
|
offset = be64_to_cpu(l2_table[j]);
|
||||||
|
@ -777,7 +777,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
if (l2_modified) {
|
if (l2_modified) {
|
||||||
if (bdrv_pwrite(s->hd,
|
if (bdrv_pwrite(bs->file,
|
||||||
l2_offset, l2_table, l2_size) != l2_size)
|
l2_offset, l2_table, l2_size) != l2_size)
|
||||||
goto fail;
|
goto fail;
|
||||||
}
|
}
|
||||||
|
@ -799,7 +799,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
|
||||||
if (l1_modified) {
|
if (l1_modified) {
|
||||||
for(i = 0; i < l1_size; i++)
|
for(i = 0; i < l1_size; i++)
|
||||||
cpu_to_be64s(&l1_table[i]);
|
cpu_to_be64s(&l1_table[i]);
|
||||||
if (bdrv_pwrite(s->hd, l1_table_offset, l1_table,
|
if (bdrv_pwrite(bs->file, l1_table_offset, l1_table,
|
||||||
l1_size2) != l1_size2)
|
l1_size2) != l1_size2)
|
||||||
goto fail;
|
goto fail;
|
||||||
for(i = 0; i < l1_size; i++)
|
for(i = 0; i < l1_size; i++)
|
||||||
|
@ -809,14 +809,14 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
|
||||||
qemu_free(l1_table);
|
qemu_free(l1_table);
|
||||||
qemu_free(l2_table);
|
qemu_free(l2_table);
|
||||||
cache_refcount_updates = 0;
|
cache_refcount_updates = 0;
|
||||||
write_refcount_block(s);
|
write_refcount_block(bs);
|
||||||
return 0;
|
return 0;
|
||||||
fail:
|
fail:
|
||||||
if (l1_allocated)
|
if (l1_allocated)
|
||||||
qemu_free(l1_table);
|
qemu_free(l1_table);
|
||||||
qemu_free(l2_table);
|
qemu_free(l2_table);
|
||||||
cache_refcount_updates = 0;
|
cache_refcount_updates = 0;
|
||||||
write_refcount_block(s);
|
write_refcount_block(bs);
|
||||||
return -EIO;
|
return -EIO;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -890,7 +890,7 @@ static int check_refcounts_l2(BlockDriverState *bs,
|
||||||
l2_size = s->l2_size * sizeof(uint64_t);
|
l2_size = s->l2_size * sizeof(uint64_t);
|
||||||
l2_table = qemu_malloc(l2_size);
|
l2_table = qemu_malloc(l2_size);
|
||||||
|
|
||||||
if (bdrv_pread(s->hd, l2_offset, l2_table, l2_size) != l2_size)
|
if (bdrv_pread(bs->file, l2_offset, l2_table, l2_size) != l2_size)
|
||||||
goto fail;
|
goto fail;
|
||||||
|
|
||||||
/* Do the actual checks */
|
/* Do the actual checks */
|
||||||
|
@ -982,7 +982,7 @@ static int check_refcounts_l1(BlockDriverState *bs,
|
||||||
l1_table = NULL;
|
l1_table = NULL;
|
||||||
} else {
|
} else {
|
||||||
l1_table = qemu_malloc(l1_size2);
|
l1_table = qemu_malloc(l1_size2);
|
||||||
if (bdrv_pread(s->hd, l1_table_offset,
|
if (bdrv_pread(bs->file, l1_table_offset,
|
||||||
l1_table, l1_size2) != l1_size2)
|
l1_table, l1_size2) != l1_size2)
|
||||||
goto fail;
|
goto fail;
|
||||||
for(i = 0;i < l1_size; i++)
|
for(i = 0;i < l1_size; i++)
|
||||||
|
@ -1051,7 +1051,7 @@ int qcow2_check_refcounts(BlockDriverState *bs)
|
||||||
uint16_t *refcount_table;
|
uint16_t *refcount_table;
|
||||||
int ret, errors = 0;
|
int ret, errors = 0;
|
||||||
|
|
||||||
size = bdrv_getlength(s->hd);
|
size = bdrv_getlength(bs->file);
|
||||||
nb_clusters = size_to_clusters(s, size);
|
nb_clusters = size_to_clusters(s, size);
|
||||||
refcount_table = qemu_mallocz(nb_clusters * sizeof(uint16_t));
|
refcount_table = qemu_mallocz(nb_clusters * sizeof(uint16_t));
|
||||||
|
|
||||||
|
|
|
@ -79,7 +79,7 @@ int qcow2_read_snapshots(BlockDriverState *bs)
|
||||||
s->snapshots = qemu_mallocz(s->nb_snapshots * sizeof(QCowSnapshot));
|
s->snapshots = qemu_mallocz(s->nb_snapshots * sizeof(QCowSnapshot));
|
||||||
for(i = 0; i < s->nb_snapshots; i++) {
|
for(i = 0; i < s->nb_snapshots; i++) {
|
||||||
offset = align_offset(offset, 8);
|
offset = align_offset(offset, 8);
|
||||||
if (bdrv_pread(s->hd, offset, &h, sizeof(h)) != sizeof(h))
|
if (bdrv_pread(bs->file, offset, &h, sizeof(h)) != sizeof(h))
|
||||||
goto fail;
|
goto fail;
|
||||||
offset += sizeof(h);
|
offset += sizeof(h);
|
||||||
sn = s->snapshots + i;
|
sn = s->snapshots + i;
|
||||||
|
@ -97,13 +97,13 @@ int qcow2_read_snapshots(BlockDriverState *bs)
|
||||||
offset += extra_data_size;
|
offset += extra_data_size;
|
||||||
|
|
||||||
sn->id_str = qemu_malloc(id_str_size + 1);
|
sn->id_str = qemu_malloc(id_str_size + 1);
|
||||||
if (bdrv_pread(s->hd, offset, sn->id_str, id_str_size) != id_str_size)
|
if (bdrv_pread(bs->file, offset, sn->id_str, id_str_size) != id_str_size)
|
||||||
goto fail;
|
goto fail;
|
||||||
offset += id_str_size;
|
offset += id_str_size;
|
||||||
sn->id_str[id_str_size] = '\0';
|
sn->id_str[id_str_size] = '\0';
|
||||||
|
|
||||||
sn->name = qemu_malloc(name_size + 1);
|
sn->name = qemu_malloc(name_size + 1);
|
||||||
if (bdrv_pread(s->hd, offset, sn->name, name_size) != name_size)
|
if (bdrv_pread(bs->file, offset, sn->name, name_size) != name_size)
|
||||||
goto fail;
|
goto fail;
|
||||||
offset += name_size;
|
offset += name_size;
|
||||||
sn->name[name_size] = '\0';
|
sn->name[name_size] = '\0';
|
||||||
|
@ -158,24 +158,24 @@ static int qcow_write_snapshots(BlockDriverState *bs)
|
||||||
h.id_str_size = cpu_to_be16(id_str_size);
|
h.id_str_size = cpu_to_be16(id_str_size);
|
||||||
h.name_size = cpu_to_be16(name_size);
|
h.name_size = cpu_to_be16(name_size);
|
||||||
offset = align_offset(offset, 8);
|
offset = align_offset(offset, 8);
|
||||||
if (bdrv_pwrite(s->hd, offset, &h, sizeof(h)) != sizeof(h))
|
if (bdrv_pwrite(bs->file, offset, &h, sizeof(h)) != sizeof(h))
|
||||||
goto fail;
|
goto fail;
|
||||||
offset += sizeof(h);
|
offset += sizeof(h);
|
||||||
if (bdrv_pwrite(s->hd, offset, sn->id_str, id_str_size) != id_str_size)
|
if (bdrv_pwrite(bs->file, offset, sn->id_str, id_str_size) != id_str_size)
|
||||||
goto fail;
|
goto fail;
|
||||||
offset += id_str_size;
|
offset += id_str_size;
|
||||||
if (bdrv_pwrite(s->hd, offset, sn->name, name_size) != name_size)
|
if (bdrv_pwrite(bs->file, offset, sn->name, name_size) != name_size)
|
||||||
goto fail;
|
goto fail;
|
||||||
offset += name_size;
|
offset += name_size;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* update the various header fields */
|
/* update the various header fields */
|
||||||
data64 = cpu_to_be64(snapshots_offset);
|
data64 = cpu_to_be64(snapshots_offset);
|
||||||
if (bdrv_pwrite(s->hd, offsetof(QCowHeader, snapshots_offset),
|
if (bdrv_pwrite(bs->file, offsetof(QCowHeader, snapshots_offset),
|
||||||
&data64, sizeof(data64)) != sizeof(data64))
|
&data64, sizeof(data64)) != sizeof(data64))
|
||||||
goto fail;
|
goto fail;
|
||||||
data32 = cpu_to_be32(s->nb_snapshots);
|
data32 = cpu_to_be32(s->nb_snapshots);
|
||||||
if (bdrv_pwrite(s->hd, offsetof(QCowHeader, nb_snapshots),
|
if (bdrv_pwrite(bs->file, offsetof(QCowHeader, nb_snapshots),
|
||||||
&data32, sizeof(data32)) != sizeof(data32))
|
&data32, sizeof(data32)) != sizeof(data32))
|
||||||
goto fail;
|
goto fail;
|
||||||
|
|
||||||
|
@ -284,7 +284,7 @@ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)
|
||||||
for(i = 0; i < s->l1_size; i++) {
|
for(i = 0; i < s->l1_size; i++) {
|
||||||
l1_table[i] = cpu_to_be64(s->l1_table[i]);
|
l1_table[i] = cpu_to_be64(s->l1_table[i]);
|
||||||
}
|
}
|
||||||
if (bdrv_pwrite(s->hd, sn->l1_table_offset,
|
if (bdrv_pwrite(bs->file, sn->l1_table_offset,
|
||||||
l1_table, s->l1_size * sizeof(uint64_t)) !=
|
l1_table, s->l1_size * sizeof(uint64_t)) !=
|
||||||
(s->l1_size * sizeof(uint64_t)))
|
(s->l1_size * sizeof(uint64_t)))
|
||||||
goto fail;
|
goto fail;
|
||||||
|
@ -332,10 +332,10 @@ int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id)
|
||||||
s->l1_size = sn->l1_size;
|
s->l1_size = sn->l1_size;
|
||||||
l1_size2 = s->l1_size * sizeof(uint64_t);
|
l1_size2 = s->l1_size * sizeof(uint64_t);
|
||||||
/* copy the snapshot l1 table to the current l1 table */
|
/* copy the snapshot l1 table to the current l1 table */
|
||||||
if (bdrv_pread(s->hd, sn->l1_table_offset,
|
if (bdrv_pread(bs->file, sn->l1_table_offset,
|
||||||
s->l1_table, l1_size2) != l1_size2)
|
s->l1_table, l1_size2) != l1_size2)
|
||||||
goto fail;
|
goto fail;
|
||||||
if (bdrv_pwrite(s->hd, s->l1_table_offset,
|
if (bdrv_pwrite(bs->file, s->l1_table_offset,
|
||||||
s->l1_table, l1_size2) != l1_size2)
|
s->l1_table, l1_size2) != l1_size2)
|
||||||
goto fail;
|
goto fail;
|
||||||
for(i = 0;i < s->l1_size; i++) {
|
for(i = 0;i < s->l1_size; i++) {
|
||||||
|
|
110
block/qcow2.c
110
block/qcow2.c
|
@ -77,7 +77,6 @@ static int qcow_probe(const uint8_t *buf, int buf_size, const char *filename)
|
||||||
static int qcow_read_extensions(BlockDriverState *bs, uint64_t start_offset,
|
static int qcow_read_extensions(BlockDriverState *bs, uint64_t start_offset,
|
||||||
uint64_t end_offset)
|
uint64_t end_offset)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
|
||||||
QCowExtension ext;
|
QCowExtension ext;
|
||||||
uint64_t offset;
|
uint64_t offset;
|
||||||
|
|
||||||
|
@ -95,7 +94,7 @@ static int qcow_read_extensions(BlockDriverState *bs, uint64_t start_offset,
|
||||||
printf("attemting to read extended header in offset %lu\n", offset);
|
printf("attemting to read extended header in offset %lu\n", offset);
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
if (bdrv_pread(s->hd, offset, &ext, sizeof(ext)) != sizeof(ext)) {
|
if (bdrv_pread(bs->file, offset, &ext, sizeof(ext)) != sizeof(ext)) {
|
||||||
fprintf(stderr, "qcow_handle_extension: ERROR: pread fail from offset %llu\n",
|
fprintf(stderr, "qcow_handle_extension: ERROR: pread fail from offset %llu\n",
|
||||||
(unsigned long long)offset);
|
(unsigned long long)offset);
|
||||||
return 1;
|
return 1;
|
||||||
|
@ -117,7 +116,7 @@ static int qcow_read_extensions(BlockDriverState *bs, uint64_t start_offset,
|
||||||
ext.len, sizeof(bs->backing_format));
|
ext.len, sizeof(bs->backing_format));
|
||||||
return 2;
|
return 2;
|
||||||
}
|
}
|
||||||
if (bdrv_pread(s->hd, offset , bs->backing_format,
|
if (bdrv_pread(bs->file, offset , bs->backing_format,
|
||||||
ext.len) != ext.len)
|
ext.len) != ext.len)
|
||||||
return 3;
|
return 3;
|
||||||
bs->backing_format[ext.len] = '\0';
|
bs->backing_format[ext.len] = '\0';
|
||||||
|
@ -138,17 +137,14 @@ static int qcow_read_extensions(BlockDriverState *bs, uint64_t start_offset,
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
|
static int qcow_open(BlockDriverState *bs, int flags)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
BDRVQcowState *s = bs->opaque;
|
||||||
int len, i, shift, ret;
|
int len, i;
|
||||||
QCowHeader header;
|
QCowHeader header;
|
||||||
uint64_t ext_end;
|
uint64_t ext_end;
|
||||||
|
|
||||||
ret = bdrv_file_open(&s->hd, filename, flags);
|
if (bdrv_pread(bs->file, 0, &header, sizeof(header)) != sizeof(header))
|
||||||
if (ret < 0)
|
|
||||||
return ret;
|
|
||||||
if (bdrv_pread(s->hd, 0, &header, sizeof(header)) != sizeof(header))
|
|
||||||
goto fail;
|
goto fail;
|
||||||
be32_to_cpus(&header.magic);
|
be32_to_cpus(&header.magic);
|
||||||
be32_to_cpus(&header.version);
|
be32_to_cpus(&header.version);
|
||||||
|
@ -192,8 +188,7 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
|
|
||||||
/* read the level 1 table */
|
/* read the level 1 table */
|
||||||
s->l1_size = header.l1_size;
|
s->l1_size = header.l1_size;
|
||||||
shift = s->cluster_bits + s->l2_bits;
|
s->l1_vm_state_index = size_to_l1(s, header.size);
|
||||||
s->l1_vm_state_index = (header.size + (1LL << shift) - 1) >> shift;
|
|
||||||
/* the L1 table must contain at least enough entries to put
|
/* the L1 table must contain at least enough entries to put
|
||||||
header.size bytes */
|
header.size bytes */
|
||||||
if (s->l1_size < s->l1_vm_state_index)
|
if (s->l1_size < s->l1_vm_state_index)
|
||||||
|
@ -202,7 +197,7 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
if (s->l1_size > 0) {
|
if (s->l1_size > 0) {
|
||||||
s->l1_table = qemu_mallocz(
|
s->l1_table = qemu_mallocz(
|
||||||
align_offset(s->l1_size * sizeof(uint64_t), 512));
|
align_offset(s->l1_size * sizeof(uint64_t), 512));
|
||||||
if (bdrv_pread(s->hd, s->l1_table_offset, s->l1_table, s->l1_size * sizeof(uint64_t)) !=
|
if (bdrv_pread(bs->file, s->l1_table_offset, s->l1_table, s->l1_size * sizeof(uint64_t)) !=
|
||||||
s->l1_size * sizeof(uint64_t))
|
s->l1_size * sizeof(uint64_t))
|
||||||
goto fail;
|
goto fail;
|
||||||
for(i = 0;i < s->l1_size; i++) {
|
for(i = 0;i < s->l1_size; i++) {
|
||||||
|
@ -235,7 +230,7 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
len = header.backing_file_size;
|
len = header.backing_file_size;
|
||||||
if (len > 1023)
|
if (len > 1023)
|
||||||
len = 1023;
|
len = 1023;
|
||||||
if (bdrv_pread(s->hd, header.backing_file_offset, bs->backing_file, len) != len)
|
if (bdrv_pread(bs->file, header.backing_file_offset, bs->backing_file, len) != len)
|
||||||
goto fail;
|
goto fail;
|
||||||
bs->backing_file[len] = '\0';
|
bs->backing_file[len] = '\0';
|
||||||
}
|
}
|
||||||
|
@ -254,7 +249,6 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
qemu_free(s->l2_cache);
|
qemu_free(s->l2_cache);
|
||||||
qemu_free(s->cluster_cache);
|
qemu_free(s->cluster_cache);
|
||||||
qemu_free(s->cluster_data);
|
qemu_free(s->cluster_data);
|
||||||
bdrv_delete(s->hd);
|
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -429,7 +423,7 @@ static void qcow_aio_read_cb(void *opaque, int ret)
|
||||||
acb->hd_iov.iov_base = (void *)acb->buf;
|
acb->hd_iov.iov_base = (void *)acb->buf;
|
||||||
acb->hd_iov.iov_len = acb->cur_nr_sectors * 512;
|
acb->hd_iov.iov_len = acb->cur_nr_sectors * 512;
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_READ_BACKING_AIO);
|
BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO);
|
||||||
acb->hd_aiocb = bdrv_aio_readv(bs->backing_hd, acb->sector_num,
|
acb->hd_aiocb = bdrv_aio_readv(bs->backing_hd, acb->sector_num,
|
||||||
&acb->hd_qiov, acb->cur_nr_sectors,
|
&acb->hd_qiov, acb->cur_nr_sectors,
|
||||||
qcow_aio_read_cb, acb);
|
qcow_aio_read_cb, acb);
|
||||||
|
@ -449,7 +443,7 @@ static void qcow_aio_read_cb(void *opaque, int ret)
|
||||||
}
|
}
|
||||||
} else if (acb->cluster_offset & QCOW_OFLAG_COMPRESSED) {
|
} else if (acb->cluster_offset & QCOW_OFLAG_COMPRESSED) {
|
||||||
/* add AIO support for compressed blocks ? */
|
/* add AIO support for compressed blocks ? */
|
||||||
if (qcow2_decompress_cluster(s, acb->cluster_offset) < 0)
|
if (qcow2_decompress_cluster(bs, acb->cluster_offset) < 0)
|
||||||
goto done;
|
goto done;
|
||||||
memcpy(acb->buf, s->cluster_cache + index_in_cluster * 512,
|
memcpy(acb->buf, s->cluster_cache + index_in_cluster * 512,
|
||||||
512 * acb->cur_nr_sectors);
|
512 * acb->cur_nr_sectors);
|
||||||
|
@ -465,8 +459,8 @@ static void qcow_aio_read_cb(void *opaque, int ret)
|
||||||
acb->hd_iov.iov_base = (void *)acb->buf;
|
acb->hd_iov.iov_base = (void *)acb->buf;
|
||||||
acb->hd_iov.iov_len = acb->cur_nr_sectors * 512;
|
acb->hd_iov.iov_len = acb->cur_nr_sectors * 512;
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_READ_AIO);
|
BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
|
||||||
acb->hd_aiocb = bdrv_aio_readv(s->hd,
|
acb->hd_aiocb = bdrv_aio_readv(bs->file,
|
||||||
(acb->cluster_offset >> 9) + index_in_cluster,
|
(acb->cluster_offset >> 9) + index_in_cluster,
|
||||||
&acb->hd_qiov, acb->cur_nr_sectors,
|
&acb->hd_qiov, acb->cur_nr_sectors,
|
||||||
qcow_aio_read_cb, acb);
|
qcow_aio_read_cb, acb);
|
||||||
|
@ -615,8 +609,8 @@ static void qcow_aio_write_cb(void *opaque, int ret)
|
||||||
acb->hd_iov.iov_base = (void *)src_buf;
|
acb->hd_iov.iov_base = (void *)src_buf;
|
||||||
acb->hd_iov.iov_len = acb->cur_nr_sectors * 512;
|
acb->hd_iov.iov_len = acb->cur_nr_sectors * 512;
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_WRITE_AIO);
|
BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
|
||||||
acb->hd_aiocb = bdrv_aio_writev(s->hd,
|
acb->hd_aiocb = bdrv_aio_writev(bs->file,
|
||||||
(acb->cluster_offset >> 9) + index_in_cluster,
|
(acb->cluster_offset >> 9) + index_in_cluster,
|
||||||
&acb->hd_qiov, acb->cur_nr_sectors,
|
&acb->hd_qiov, acb->cur_nr_sectors,
|
||||||
qcow_aio_write_cb, acb);
|
qcow_aio_write_cb, acb);
|
||||||
|
@ -663,7 +657,6 @@ static void qcow_close(BlockDriverState *bs)
|
||||||
qemu_free(s->cluster_cache);
|
qemu_free(s->cluster_cache);
|
||||||
qemu_free(s->cluster_data);
|
qemu_free(s->cluster_data);
|
||||||
qcow2_refcount_close(bs);
|
qcow2_refcount_close(bs);
|
||||||
bdrv_delete(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -733,7 +726,7 @@ static int qcow2_update_ext_header(BlockDriverState *bs,
|
||||||
backing_file_offset = sizeof(QCowHeader) + offset;
|
backing_file_offset = sizeof(QCowHeader) + offset;
|
||||||
}
|
}
|
||||||
|
|
||||||
ret = bdrv_pwrite(s->hd, sizeof(QCowHeader), buf, ext_size);
|
ret = bdrv_pwrite(bs->file, sizeof(QCowHeader), buf, ext_size);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
goto fail;
|
goto fail;
|
||||||
}
|
}
|
||||||
|
@ -742,13 +735,13 @@ static int qcow2_update_ext_header(BlockDriverState *bs,
|
||||||
uint64_t be_backing_file_offset = cpu_to_be64(backing_file_offset);
|
uint64_t be_backing_file_offset = cpu_to_be64(backing_file_offset);
|
||||||
uint32_t be_backing_file_size = cpu_to_be32(backing_file_len);
|
uint32_t be_backing_file_size = cpu_to_be32(backing_file_len);
|
||||||
|
|
||||||
ret = bdrv_pwrite(s->hd, offsetof(QCowHeader, backing_file_offset),
|
ret = bdrv_pwrite(bs->file, offsetof(QCowHeader, backing_file_offset),
|
||||||
&be_backing_file_offset, sizeof(uint64_t));
|
&be_backing_file_offset, sizeof(uint64_t));
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
goto fail;
|
goto fail;
|
||||||
}
|
}
|
||||||
|
|
||||||
ret = bdrv_pwrite(s->hd, offsetof(QCowHeader, backing_file_size),
|
ret = bdrv_pwrite(bs->file, offsetof(QCowHeader, backing_file_size),
|
||||||
&be_backing_file_size, sizeof(uint32_t));
|
&be_backing_file_size, sizeof(uint32_t));
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
goto fail;
|
goto fail;
|
||||||
|
@ -789,7 +782,6 @@ static int get_bits_from_size(size_t size)
|
||||||
|
|
||||||
static int preallocate(BlockDriverState *bs)
|
static int preallocate(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
|
||||||
uint64_t nb_sectors;
|
uint64_t nb_sectors;
|
||||||
uint64_t offset;
|
uint64_t offset;
|
||||||
int num;
|
int num;
|
||||||
|
@ -832,7 +824,7 @@ static int preallocate(BlockDriverState *bs)
|
||||||
if (meta.cluster_offset != 0) {
|
if (meta.cluster_offset != 0) {
|
||||||
uint8_t buf[512];
|
uint8_t buf[512];
|
||||||
memset(buf, 0, 512);
|
memset(buf, 0, 512);
|
||||||
bdrv_write(s->hd, (meta.cluster_offset >> 9) + num - 1, buf, 1);
|
bdrv_write(bs->file, (meta.cluster_offset >> 9) + num - 1, buf, 1);
|
||||||
}
|
}
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
|
@ -847,9 +839,9 @@ static int qcow_make_empty(BlockDriverState *bs)
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
memset(s->l1_table, 0, l1_length);
|
memset(s->l1_table, 0, l1_length);
|
||||||
if (bdrv_pwrite(s->hd, s->l1_table_offset, s->l1_table, l1_length) < 0)
|
if (bdrv_pwrite(bs->file, s->l1_table_offset, s->l1_table, l1_length) < 0)
|
||||||
return -1;
|
return -1;
|
||||||
ret = bdrv_truncate(s->hd, s->l1_table_offset + l1_length);
|
ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length);
|
||||||
if (ret < 0)
|
if (ret < 0)
|
||||||
return ret;
|
return ret;
|
||||||
|
|
||||||
|
@ -858,6 +850,43 @@ static int qcow_make_empty(BlockDriverState *bs)
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int qcow2_truncate(BlockDriverState *bs, int64_t offset)
|
||||||
|
{
|
||||||
|
BDRVQcowState *s = bs->opaque;
|
||||||
|
int ret, new_l1_size;
|
||||||
|
|
||||||
|
if (offset & 511) {
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* cannot proceed if image has snapshots */
|
||||||
|
if (s->nb_snapshots) {
|
||||||
|
return -ENOTSUP;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* shrinking is currently not supported */
|
||||||
|
if (offset < bs->total_sectors * 512) {
|
||||||
|
return -ENOTSUP;
|
||||||
|
}
|
||||||
|
|
||||||
|
new_l1_size = size_to_l1(s, offset);
|
||||||
|
ret = qcow2_grow_l1_table(bs, new_l1_size);
|
||||||
|
if (ret < 0) {
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* write updated header.size */
|
||||||
|
offset = cpu_to_be64(offset);
|
||||||
|
ret = bdrv_pwrite(bs->file, offsetof(QCowHeader, size),
|
||||||
|
&offset, sizeof(uint64_t));
|
||||||
|
if (ret < 0) {
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
s->l1_vm_state_index = new_l1_size;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
/* XXX: put compressed sectors first, then all the cluster aligned
|
/* XXX: put compressed sectors first, then all the cluster aligned
|
||||||
tables to avoid losing bytes in alignment */
|
tables to avoid losing bytes in alignment */
|
||||||
static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
||||||
|
@ -872,9 +901,9 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
||||||
if (nb_sectors == 0) {
|
if (nb_sectors == 0) {
|
||||||
/* align end of file to a sector boundary to ease reading with
|
/* align end of file to a sector boundary to ease reading with
|
||||||
sector based I/Os */
|
sector based I/Os */
|
||||||
cluster_offset = bdrv_getlength(s->hd);
|
cluster_offset = bdrv_getlength(bs->file);
|
||||||
cluster_offset = (cluster_offset + 511) & ~511;
|
cluster_offset = (cluster_offset + 511) & ~511;
|
||||||
bdrv_truncate(s->hd, cluster_offset);
|
bdrv_truncate(bs->file, cluster_offset);
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -917,8 +946,8 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
||||||
if (!cluster_offset)
|
if (!cluster_offset)
|
||||||
return -1;
|
return -1;
|
||||||
cluster_offset &= s->cluster_offset_mask;
|
cluster_offset &= s->cluster_offset_mask;
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_WRITE_COMPRESSED);
|
BLKDBG_EVENT(bs->file, BLKDBG_WRITE_COMPRESSED);
|
||||||
if (bdrv_pwrite(s->hd, cluster_offset, out_buf, out_len) != out_len) {
|
if (bdrv_pwrite(bs->file, cluster_offset, out_buf, out_len) != out_len) {
|
||||||
qemu_free(out_buf);
|
qemu_free(out_buf);
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
@ -930,16 +959,13 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
||||||
|
|
||||||
static void qcow_flush(BlockDriverState *bs)
|
static void qcow_flush(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
bdrv_flush(bs->file);
|
||||||
bdrv_flush(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static BlockDriverAIOCB *qcow_aio_flush(BlockDriverState *bs,
|
static BlockDriverAIOCB *qcow_aio_flush(BlockDriverState *bs,
|
||||||
BlockDriverCompletionFunc *cb, void *opaque)
|
BlockDriverCompletionFunc *cb, void *opaque)
|
||||||
{
|
{
|
||||||
BDRVQcowState *s = bs->opaque;
|
return bdrv_aio_flush(bs->file, cb, opaque);
|
||||||
|
|
||||||
return bdrv_aio_flush(s->hd, cb, opaque);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static int64_t qcow_vm_state_offset(BDRVQcowState *s)
|
static int64_t qcow_vm_state_offset(BDRVQcowState *s)
|
||||||
|
@ -968,7 +994,7 @@ static void dump_refcounts(BlockDriverState *bs)
|
||||||
int64_t nb_clusters, k, k1, size;
|
int64_t nb_clusters, k, k1, size;
|
||||||
int refcount;
|
int refcount;
|
||||||
|
|
||||||
size = bdrv_getlength(s->hd);
|
size = bdrv_getlength(bs->file);
|
||||||
nb_clusters = size_to_clusters(s, size);
|
nb_clusters = size_to_clusters(s, size);
|
||||||
for(k = 0; k < nb_clusters;) {
|
for(k = 0; k < nb_clusters;) {
|
||||||
k1 = k;
|
k1 = k;
|
||||||
|
@ -988,7 +1014,7 @@ static int qcow_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
|
||||||
int growable = bs->growable;
|
int growable = bs->growable;
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_VMSTATE_SAVE);
|
BLKDBG_EVENT(bs->file, BLKDBG_VMSTATE_SAVE);
|
||||||
bs->growable = 1;
|
bs->growable = 1;
|
||||||
ret = bdrv_pwrite(bs, qcow_vm_state_offset(s) + pos, buf, size);
|
ret = bdrv_pwrite(bs, qcow_vm_state_offset(s) + pos, buf, size);
|
||||||
bs->growable = growable;
|
bs->growable = growable;
|
||||||
|
@ -1003,7 +1029,7 @@ static int qcow_load_vmstate(BlockDriverState *bs, uint8_t *buf,
|
||||||
int growable = bs->growable;
|
int growable = bs->growable;
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
BLKDBG_EVENT(s->hd, BLKDBG_VMSTATE_LOAD);
|
BLKDBG_EVENT(bs->file, BLKDBG_VMSTATE_LOAD);
|
||||||
bs->growable = 1;
|
bs->growable = 1;
|
||||||
ret = bdrv_pread(bs, qcow_vm_state_offset(s) + pos, buf, size);
|
ret = bdrv_pread(bs, qcow_vm_state_offset(s) + pos, buf, size);
|
||||||
bs->growable = growable;
|
bs->growable = growable;
|
||||||
|
@ -1060,7 +1086,9 @@ static BlockDriver bdrv_qcow2 = {
|
||||||
.bdrv_aio_readv = qcow_aio_readv,
|
.bdrv_aio_readv = qcow_aio_readv,
|
||||||
.bdrv_aio_writev = qcow_aio_writev,
|
.bdrv_aio_writev = qcow_aio_writev,
|
||||||
.bdrv_aio_flush = qcow_aio_flush,
|
.bdrv_aio_flush = qcow_aio_flush,
|
||||||
.bdrv_write_compressed = qcow_write_compressed,
|
|
||||||
|
.bdrv_truncate = qcow2_truncate,
|
||||||
|
.bdrv_write_compressed = qcow_write_compressed,
|
||||||
|
|
||||||
.bdrv_snapshot_create = qcow2_snapshot_create,
|
.bdrv_snapshot_create = qcow2_snapshot_create,
|
||||||
.bdrv_snapshot_goto = qcow2_snapshot_goto,
|
.bdrv_snapshot_goto = qcow2_snapshot_goto,
|
||||||
|
|
|
@ -150,6 +150,12 @@ static inline int size_to_clusters(BDRVQcowState *s, int64_t size)
|
||||||
return (size + (s->cluster_size - 1)) >> s->cluster_bits;
|
return (size + (s->cluster_size - 1)) >> s->cluster_bits;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static inline int size_to_l1(BDRVQcowState *s, int64_t size)
|
||||||
|
{
|
||||||
|
int shift = s->cluster_bits + s->l2_bits;
|
||||||
|
return (size + (1ULL << shift) - 1) >> shift;
|
||||||
|
}
|
||||||
|
|
||||||
static inline int64_t align_offset(int64_t offset, int n)
|
static inline int64_t align_offset(int64_t offset, int n)
|
||||||
{
|
{
|
||||||
offset = (offset + n - 1) & ~(n - 1);
|
offset = (offset + n - 1) & ~(n - 1);
|
||||||
|
@ -184,7 +190,7 @@ int qcow2_check_refcounts(BlockDriverState *bs);
|
||||||
/* qcow2-cluster.c functions */
|
/* qcow2-cluster.c functions */
|
||||||
int qcow2_grow_l1_table(BlockDriverState *bs, int min_size);
|
int qcow2_grow_l1_table(BlockDriverState *bs, int min_size);
|
||||||
void qcow2_l2_cache_reset(BlockDriverState *bs);
|
void qcow2_l2_cache_reset(BlockDriverState *bs);
|
||||||
int qcow2_decompress_cluster(BDRVQcowState *s, uint64_t cluster_offset);
|
int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
|
||||||
void qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num,
|
void qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num,
|
||||||
uint8_t *out_buf, const uint8_t *in_buf,
|
uint8_t *out_buf, const uint8_t *in_buf,
|
||||||
int nb_sectors, int enc,
|
int nb_sectors, int enc,
|
||||||
|
|
|
@ -105,7 +105,6 @@
|
||||||
typedef struct BDRVRawState {
|
typedef struct BDRVRawState {
|
||||||
int fd;
|
int fd;
|
||||||
int type;
|
int type;
|
||||||
unsigned int lseek_err_cnt;
|
|
||||||
int open_flags;
|
int open_flags;
|
||||||
#if defined(__linux__)
|
#if defined(__linux__)
|
||||||
/* linux floppy specific */
|
/* linux floppy specific */
|
||||||
|
@ -134,8 +133,6 @@ static int raw_open_common(BlockDriverState *bs, const char *filename,
|
||||||
BDRVRawState *s = bs->opaque;
|
BDRVRawState *s = bs->opaque;
|
||||||
int fd, ret;
|
int fd, ret;
|
||||||
|
|
||||||
s->lseek_err_cnt = 0;
|
|
||||||
|
|
||||||
s->open_flags = open_flags | O_BINARY;
|
s->open_flags = open_flags | O_BINARY;
|
||||||
s->open_flags &= ~O_ACCMODE;
|
s->open_flags &= ~O_ACCMODE;
|
||||||
if (bdrv_flags & BDRV_O_RDWR) {
|
if (bdrv_flags & BDRV_O_RDWR) {
|
||||||
|
@ -243,19 +240,7 @@ static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
|
||||||
if (ret < 0)
|
if (ret < 0)
|
||||||
return ret;
|
return ret;
|
||||||
|
|
||||||
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
|
ret = pread(s->fd, buf, count, offset);
|
||||||
++(s->lseek_err_cnt);
|
|
||||||
if(s->lseek_err_cnt <= 10) {
|
|
||||||
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64
|
|
||||||
"] lseek failed : %d = %s\n",
|
|
||||||
s->fd, bs->filename, offset, buf, count,
|
|
||||||
bs->total_sectors, errno, strerror(errno));
|
|
||||||
}
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
s->lseek_err_cnt=0;
|
|
||||||
|
|
||||||
ret = read(s->fd, buf, count);
|
|
||||||
if (ret == count)
|
if (ret == count)
|
||||||
goto label__raw_read__success;
|
goto label__raw_read__success;
|
||||||
|
|
||||||
|
@ -276,12 +261,10 @@ static int raw_pread_aligned(BlockDriverState *bs, int64_t offset,
|
||||||
|
|
||||||
/* Try harder for CDrom. */
|
/* Try harder for CDrom. */
|
||||||
if (bs->type == BDRV_TYPE_CDROM) {
|
if (bs->type == BDRV_TYPE_CDROM) {
|
||||||
lseek(s->fd, offset, SEEK_SET);
|
ret = pread(s->fd, buf, count, offset);
|
||||||
ret = read(s->fd, buf, count);
|
|
||||||
if (ret == count)
|
if (ret == count)
|
||||||
goto label__raw_read__success;
|
goto label__raw_read__success;
|
||||||
lseek(s->fd, offset, SEEK_SET);
|
ret = pread(s->fd, buf, count, offset);
|
||||||
ret = read(s->fd, buf, count);
|
|
||||||
if (ret == count)
|
if (ret == count)
|
||||||
goto label__raw_read__success;
|
goto label__raw_read__success;
|
||||||
|
|
||||||
|
@ -313,19 +296,7 @@ static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
|
||||||
if (ret < 0)
|
if (ret < 0)
|
||||||
return -errno;
|
return -errno;
|
||||||
|
|
||||||
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
|
ret = pwrite(s->fd, buf, count, offset);
|
||||||
++(s->lseek_err_cnt);
|
|
||||||
if(s->lseek_err_cnt) {
|
|
||||||
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%"
|
|
||||||
PRId64 "] lseek failed : %d = %s\n",
|
|
||||||
s->fd, bs->filename, offset, buf, count,
|
|
||||||
bs->total_sectors, errno, strerror(errno));
|
|
||||||
}
|
|
||||||
return -EIO;
|
|
||||||
}
|
|
||||||
s->lseek_err_cnt = 0;
|
|
||||||
|
|
||||||
ret = write(s->fd, buf, count);
|
|
||||||
if (ret == count)
|
if (ret == count)
|
||||||
goto label__raw_write__success;
|
goto label__raw_write__success;
|
||||||
|
|
||||||
|
@ -768,11 +739,12 @@ static QEMUOptionParameter raw_create_options[] = {
|
||||||
{ NULL }
|
{ NULL }
|
||||||
};
|
};
|
||||||
|
|
||||||
static BlockDriver bdrv_raw = {
|
static BlockDriver bdrv_file = {
|
||||||
.format_name = "raw",
|
.format_name = "file",
|
||||||
|
.protocol_name = "file",
|
||||||
.instance_size = sizeof(BDRVRawState),
|
.instance_size = sizeof(BDRVRawState),
|
||||||
.bdrv_probe = NULL, /* no probe for protocols */
|
.bdrv_probe = NULL, /* no probe for protocols */
|
||||||
.bdrv_open = raw_open,
|
.bdrv_file_open = raw_open,
|
||||||
.bdrv_read = raw_read,
|
.bdrv_read = raw_read,
|
||||||
.bdrv_write = raw_write,
|
.bdrv_write = raw_write,
|
||||||
.bdrv_close = raw_close,
|
.bdrv_close = raw_close,
|
||||||
|
@ -1026,9 +998,10 @@ static int hdev_create(const char *filename, QEMUOptionParameter *options)
|
||||||
|
|
||||||
static BlockDriver bdrv_host_device = {
|
static BlockDriver bdrv_host_device = {
|
||||||
.format_name = "host_device",
|
.format_name = "host_device",
|
||||||
|
.protocol_name = "host_device",
|
||||||
.instance_size = sizeof(BDRVRawState),
|
.instance_size = sizeof(BDRVRawState),
|
||||||
.bdrv_probe_device = hdev_probe_device,
|
.bdrv_probe_device = hdev_probe_device,
|
||||||
.bdrv_open = hdev_open,
|
.bdrv_file_open = hdev_open,
|
||||||
.bdrv_close = raw_close,
|
.bdrv_close = raw_close,
|
||||||
.bdrv_create = hdev_create,
|
.bdrv_create = hdev_create,
|
||||||
.create_options = raw_create_options,
|
.create_options = raw_create_options,
|
||||||
|
@ -1140,9 +1113,10 @@ static int floppy_eject(BlockDriverState *bs, int eject_flag)
|
||||||
|
|
||||||
static BlockDriver bdrv_host_floppy = {
|
static BlockDriver bdrv_host_floppy = {
|
||||||
.format_name = "host_floppy",
|
.format_name = "host_floppy",
|
||||||
|
.protocol_name = "host_floppy",
|
||||||
.instance_size = sizeof(BDRVRawState),
|
.instance_size = sizeof(BDRVRawState),
|
||||||
.bdrv_probe_device = floppy_probe_device,
|
.bdrv_probe_device = floppy_probe_device,
|
||||||
.bdrv_open = floppy_open,
|
.bdrv_file_open = floppy_open,
|
||||||
.bdrv_close = raw_close,
|
.bdrv_close = raw_close,
|
||||||
.bdrv_create = hdev_create,
|
.bdrv_create = hdev_create,
|
||||||
.create_options = raw_create_options,
|
.create_options = raw_create_options,
|
||||||
|
@ -1239,9 +1213,10 @@ static int cdrom_set_locked(BlockDriverState *bs, int locked)
|
||||||
|
|
||||||
static BlockDriver bdrv_host_cdrom = {
|
static BlockDriver bdrv_host_cdrom = {
|
||||||
.format_name = "host_cdrom",
|
.format_name = "host_cdrom",
|
||||||
|
.protocol_name = "host_cdrom",
|
||||||
.instance_size = sizeof(BDRVRawState),
|
.instance_size = sizeof(BDRVRawState),
|
||||||
.bdrv_probe_device = cdrom_probe_device,
|
.bdrv_probe_device = cdrom_probe_device,
|
||||||
.bdrv_open = cdrom_open,
|
.bdrv_file_open = cdrom_open,
|
||||||
.bdrv_close = raw_close,
|
.bdrv_close = raw_close,
|
||||||
.bdrv_create = hdev_create,
|
.bdrv_create = hdev_create,
|
||||||
.create_options = raw_create_options,
|
.create_options = raw_create_options,
|
||||||
|
@ -1361,9 +1336,10 @@ static int cdrom_set_locked(BlockDriverState *bs, int locked)
|
||||||
|
|
||||||
static BlockDriver bdrv_host_cdrom = {
|
static BlockDriver bdrv_host_cdrom = {
|
||||||
.format_name = "host_cdrom",
|
.format_name = "host_cdrom",
|
||||||
|
.protocol_name = "host_cdrom",
|
||||||
.instance_size = sizeof(BDRVRawState),
|
.instance_size = sizeof(BDRVRawState),
|
||||||
.bdrv_probe_device = cdrom_probe_device,
|
.bdrv_probe_device = cdrom_probe_device,
|
||||||
.bdrv_open = cdrom_open,
|
.bdrv_file_open = cdrom_open,
|
||||||
.bdrv_close = raw_close,
|
.bdrv_close = raw_close,
|
||||||
.bdrv_create = hdev_create,
|
.bdrv_create = hdev_create,
|
||||||
.create_options = raw_create_options,
|
.create_options = raw_create_options,
|
||||||
|
@ -1385,13 +1361,13 @@ static BlockDriver bdrv_host_cdrom = {
|
||||||
};
|
};
|
||||||
#endif /* __FreeBSD__ */
|
#endif /* __FreeBSD__ */
|
||||||
|
|
||||||
static void bdrv_raw_init(void)
|
static void bdrv_file_init(void)
|
||||||
{
|
{
|
||||||
/*
|
/*
|
||||||
* Register all the drivers. Note that order is important, the driver
|
* Register all the drivers. Note that order is important, the driver
|
||||||
* registered last will get probed first.
|
* registered last will get probed first.
|
||||||
*/
|
*/
|
||||||
bdrv_register(&bdrv_raw);
|
bdrv_register(&bdrv_file);
|
||||||
bdrv_register(&bdrv_host_device);
|
bdrv_register(&bdrv_host_device);
|
||||||
#ifdef __linux__
|
#ifdef __linux__
|
||||||
bdrv_register(&bdrv_host_floppy);
|
bdrv_register(&bdrv_host_floppy);
|
||||||
|
@ -1402,4 +1378,4 @@ static void bdrv_raw_init(void)
|
||||||
#endif
|
#endif
|
||||||
}
|
}
|
||||||
|
|
||||||
block_init(bdrv_raw_init);
|
block_init(bdrv_file_init);
|
||||||
|
|
|
@ -238,10 +238,11 @@ static QEMUOptionParameter raw_create_options[] = {
|
||||||
{ NULL }
|
{ NULL }
|
||||||
};
|
};
|
||||||
|
|
||||||
static BlockDriver bdrv_raw = {
|
static BlockDriver bdrv_file = {
|
||||||
.format_name = "raw",
|
.format_name = "file",
|
||||||
|
.protocol_name = "file",
|
||||||
.instance_size = sizeof(BDRVRawState),
|
.instance_size = sizeof(BDRVRawState),
|
||||||
.bdrv_open = raw_open,
|
.bdrv_file_open = raw_open,
|
||||||
.bdrv_close = raw_close,
|
.bdrv_close = raw_close,
|
||||||
.bdrv_create = raw_create,
|
.bdrv_create = raw_create,
|
||||||
.bdrv_flush = raw_flush,
|
.bdrv_flush = raw_flush,
|
||||||
|
@ -395,9 +396,10 @@ static int raw_set_locked(BlockDriverState *bs, int locked)
|
||||||
|
|
||||||
static BlockDriver bdrv_host_device = {
|
static BlockDriver bdrv_host_device = {
|
||||||
.format_name = "host_device",
|
.format_name = "host_device",
|
||||||
|
.protocol_name = "host_device",
|
||||||
.instance_size = sizeof(BDRVRawState),
|
.instance_size = sizeof(BDRVRawState),
|
||||||
.bdrv_probe_device = hdev_probe_device,
|
.bdrv_probe_device = hdev_probe_device,
|
||||||
.bdrv_open = hdev_open,
|
.bdrv_file_open = hdev_open,
|
||||||
.bdrv_close = raw_close,
|
.bdrv_close = raw_close,
|
||||||
.bdrv_flush = raw_flush,
|
.bdrv_flush = raw_flush,
|
||||||
|
|
||||||
|
@ -406,10 +408,10 @@ static BlockDriver bdrv_host_device = {
|
||||||
.bdrv_getlength = raw_getlength,
|
.bdrv_getlength = raw_getlength,
|
||||||
};
|
};
|
||||||
|
|
||||||
static void bdrv_raw_init(void)
|
static void bdrv_file_init(void)
|
||||||
{
|
{
|
||||||
bdrv_register(&bdrv_raw);
|
bdrv_register(&bdrv_file);
|
||||||
bdrv_register(&bdrv_host_device);
|
bdrv_register(&bdrv_host_device);
|
||||||
}
|
}
|
||||||
|
|
||||||
block_init(bdrv_raw_init);
|
block_init(bdrv_file_init);
|
||||||
|
|
|
@ -0,0 +1,144 @@
|
||||||
|
|
||||||
|
#include "qemu-common.h"
|
||||||
|
#include "block_int.h"
|
||||||
|
#include "module.h"
|
||||||
|
|
||||||
|
static int raw_open(BlockDriverState *bs, int flags)
|
||||||
|
{
|
||||||
|
bs->sg = bs->file->sg;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int raw_read(BlockDriverState *bs, int64_t sector_num,
|
||||||
|
uint8_t *buf, int nb_sectors)
|
||||||
|
{
|
||||||
|
return bdrv_read(bs->file, sector_num, buf, nb_sectors);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int raw_write(BlockDriverState *bs, int64_t sector_num,
|
||||||
|
const uint8_t *buf, int nb_sectors)
|
||||||
|
{
|
||||||
|
return bdrv_write(bs->file, sector_num, buf, nb_sectors);
|
||||||
|
}
|
||||||
|
|
||||||
|
static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
|
||||||
|
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
||||||
|
BlockDriverCompletionFunc *cb, void *opaque)
|
||||||
|
{
|
||||||
|
return bdrv_aio_readv(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
|
||||||
|
}
|
||||||
|
|
||||||
|
static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
|
||||||
|
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
||||||
|
BlockDriverCompletionFunc *cb, void *opaque)
|
||||||
|
{
|
||||||
|
return bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void raw_close(BlockDriverState *bs)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
static void raw_flush(BlockDriverState *bs)
|
||||||
|
{
|
||||||
|
bdrv_flush(bs->file);
|
||||||
|
}
|
||||||
|
|
||||||
|
static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
|
||||||
|
BlockDriverCompletionFunc *cb, void *opaque)
|
||||||
|
{
|
||||||
|
return bdrv_aio_flush(bs->file, cb, opaque);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int64_t raw_getlength(BlockDriverState *bs)
|
||||||
|
{
|
||||||
|
return bdrv_getlength(bs->file);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int raw_truncate(BlockDriverState *bs, int64_t offset)
|
||||||
|
{
|
||||||
|
return bdrv_truncate(bs->file, offset);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
|
||||||
|
{
|
||||||
|
return 1; /* everything can be opened as raw image */
|
||||||
|
}
|
||||||
|
|
||||||
|
static int raw_is_inserted(BlockDriverState *bs)
|
||||||
|
{
|
||||||
|
return bdrv_is_inserted(bs->file);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int raw_eject(BlockDriverState *bs, int eject_flag)
|
||||||
|
{
|
||||||
|
return bdrv_eject(bs->file, eject_flag);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int raw_set_locked(BlockDriverState *bs, int locked)
|
||||||
|
{
|
||||||
|
bdrv_set_locked(bs->file, locked);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
|
||||||
|
{
|
||||||
|
return bdrv_ioctl(bs->file, req, buf);
|
||||||
|
}
|
||||||
|
|
||||||
|
static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
|
||||||
|
unsigned long int req, void *buf,
|
||||||
|
BlockDriverCompletionFunc *cb, void *opaque)
|
||||||
|
{
|
||||||
|
return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int raw_create(const char *filename, QEMUOptionParameter *options)
|
||||||
|
{
|
||||||
|
return bdrv_create_file(filename, options);
|
||||||
|
}
|
||||||
|
|
||||||
|
static QEMUOptionParameter raw_create_options[] = {
|
||||||
|
{
|
||||||
|
.name = BLOCK_OPT_SIZE,
|
||||||
|
.type = OPT_SIZE,
|
||||||
|
.help = "Virtual disk size"
|
||||||
|
},
|
||||||
|
{ NULL }
|
||||||
|
};
|
||||||
|
|
||||||
|
static BlockDriver bdrv_raw = {
|
||||||
|
.format_name = "raw",
|
||||||
|
|
||||||
|
/* It's really 0, but we need to make qemu_malloc() happy */
|
||||||
|
.instance_size = 1,
|
||||||
|
|
||||||
|
.bdrv_open = raw_open,
|
||||||
|
.bdrv_close = raw_close,
|
||||||
|
.bdrv_read = raw_read,
|
||||||
|
.bdrv_write = raw_write,
|
||||||
|
.bdrv_flush = raw_flush,
|
||||||
|
.bdrv_probe = raw_probe,
|
||||||
|
.bdrv_getlength = raw_getlength,
|
||||||
|
.bdrv_truncate = raw_truncate,
|
||||||
|
|
||||||
|
.bdrv_aio_readv = raw_aio_readv,
|
||||||
|
.bdrv_aio_writev = raw_aio_writev,
|
||||||
|
.bdrv_aio_flush = raw_aio_flush,
|
||||||
|
|
||||||
|
.bdrv_is_inserted = raw_is_inserted,
|
||||||
|
.bdrv_eject = raw_eject,
|
||||||
|
.bdrv_set_locked = raw_set_locked,
|
||||||
|
.bdrv_ioctl = raw_ioctl,
|
||||||
|
.bdrv_aio_ioctl = raw_aio_ioctl,
|
||||||
|
|
||||||
|
.bdrv_create = raw_create,
|
||||||
|
.create_options = raw_create_options,
|
||||||
|
};
|
||||||
|
|
||||||
|
static void bdrv_raw_init(void)
|
||||||
|
{
|
||||||
|
bdrv_register(&bdrv_raw);
|
||||||
|
}
|
||||||
|
|
||||||
|
block_init(bdrv_raw_init);
|
29
block/vdi.c
29
block/vdi.c
|
@ -376,21 +376,15 @@ static int vdi_probe(const uint8_t *buf, int buf_size, const char *filename)
|
||||||
return result;
|
return result;
|
||||||
}
|
}
|
||||||
|
|
||||||
static int vdi_open(BlockDriverState *bs, const char *filename, int flags)
|
static int vdi_open(BlockDriverState *bs, int flags)
|
||||||
{
|
{
|
||||||
BDRVVdiState *s = bs->opaque;
|
BDRVVdiState *s = bs->opaque;
|
||||||
VdiHeader header;
|
VdiHeader header;
|
||||||
size_t bmap_size;
|
size_t bmap_size;
|
||||||
int ret;
|
|
||||||
|
|
||||||
logout("\n");
|
logout("\n");
|
||||||
|
|
||||||
ret = bdrv_file_open(&s->hd, filename, flags);
|
if (bdrv_read(bs->file, 0, (uint8_t *)&header, 1) < 0) {
|
||||||
if (ret < 0) {
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (bdrv_read(s->hd, 0, (uint8_t *)&header, 1) < 0) {
|
|
||||||
goto fail;
|
goto fail;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -442,7 +436,7 @@ static int vdi_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
bmap_size = header.blocks_in_image * sizeof(uint32_t);
|
bmap_size = header.blocks_in_image * sizeof(uint32_t);
|
||||||
bmap_size = (bmap_size + SECTOR_SIZE - 1) / SECTOR_SIZE;
|
bmap_size = (bmap_size + SECTOR_SIZE - 1) / SECTOR_SIZE;
|
||||||
s->bmap = qemu_malloc(bmap_size * SECTOR_SIZE);
|
s->bmap = qemu_malloc(bmap_size * SECTOR_SIZE);
|
||||||
if (bdrv_read(s->hd, s->bmap_sector, (uint8_t *)s->bmap, bmap_size) < 0) {
|
if (bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, bmap_size) < 0) {
|
||||||
goto fail_free_bmap;
|
goto fail_free_bmap;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -452,7 +446,6 @@ static int vdi_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
qemu_free(s->bmap);
|
qemu_free(s->bmap);
|
||||||
|
|
||||||
fail:
|
fail:
|
||||||
bdrv_delete(s->hd);
|
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -607,7 +600,7 @@ static void vdi_aio_read_cb(void *opaque, int ret)
|
||||||
acb->hd_iov.iov_base = (void *)acb->buf;
|
acb->hd_iov.iov_base = (void *)acb->buf;
|
||||||
acb->hd_iov.iov_len = n_sectors * SECTOR_SIZE;
|
acb->hd_iov.iov_len = n_sectors * SECTOR_SIZE;
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
acb->hd_aiocb = bdrv_aio_readv(s->hd, offset, &acb->hd_qiov,
|
acb->hd_aiocb = bdrv_aio_readv(bs->file, offset, &acb->hd_qiov,
|
||||||
n_sectors, vdi_aio_read_cb, acb);
|
n_sectors, vdi_aio_read_cb, acb);
|
||||||
if (acb->hd_aiocb == NULL) {
|
if (acb->hd_aiocb == NULL) {
|
||||||
goto done;
|
goto done;
|
||||||
|
@ -670,7 +663,7 @@ static void vdi_aio_write_cb(void *opaque, int ret)
|
||||||
acb->hd_iov.iov_base = acb->block_buffer;
|
acb->hd_iov.iov_base = acb->block_buffer;
|
||||||
acb->hd_iov.iov_len = SECTOR_SIZE;
|
acb->hd_iov.iov_len = SECTOR_SIZE;
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
acb->hd_aiocb = bdrv_aio_writev(s->hd, 0, &acb->hd_qiov, 1,
|
acb->hd_aiocb = bdrv_aio_writev(bs->file, 0, &acb->hd_qiov, 1,
|
||||||
vdi_aio_write_cb, acb);
|
vdi_aio_write_cb, acb);
|
||||||
if (acb->hd_aiocb == NULL) {
|
if (acb->hd_aiocb == NULL) {
|
||||||
goto done;
|
goto done;
|
||||||
|
@ -699,7 +692,7 @@ static void vdi_aio_write_cb(void *opaque, int ret)
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
logout("will write %u block map sectors starting from entry %u\n",
|
logout("will write %u block map sectors starting from entry %u\n",
|
||||||
n_sectors, bmap_first);
|
n_sectors, bmap_first);
|
||||||
acb->hd_aiocb = bdrv_aio_writev(s->hd, offset, &acb->hd_qiov,
|
acb->hd_aiocb = bdrv_aio_writev(bs->file, offset, &acb->hd_qiov,
|
||||||
n_sectors, vdi_aio_write_cb, acb);
|
n_sectors, vdi_aio_write_cb, acb);
|
||||||
if (acb->hd_aiocb == NULL) {
|
if (acb->hd_aiocb == NULL) {
|
||||||
goto done;
|
goto done;
|
||||||
|
@ -748,7 +741,7 @@ static void vdi_aio_write_cb(void *opaque, int ret)
|
||||||
acb->hd_iov.iov_base = (void *)block;
|
acb->hd_iov.iov_base = (void *)block;
|
||||||
acb->hd_iov.iov_len = s->block_size;
|
acb->hd_iov.iov_len = s->block_size;
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
acb->hd_aiocb = bdrv_aio_writev(s->hd, offset,
|
acb->hd_aiocb = bdrv_aio_writev(bs->file, offset,
|
||||||
&acb->hd_qiov, s->block_sectors,
|
&acb->hd_qiov, s->block_sectors,
|
||||||
vdi_aio_write_cb, acb);
|
vdi_aio_write_cb, acb);
|
||||||
if (acb->hd_aiocb == NULL) {
|
if (acb->hd_aiocb == NULL) {
|
||||||
|
@ -761,7 +754,7 @@ static void vdi_aio_write_cb(void *opaque, int ret)
|
||||||
acb->hd_iov.iov_base = (void *)acb->buf;
|
acb->hd_iov.iov_base = (void *)acb->buf;
|
||||||
acb->hd_iov.iov_len = n_sectors * SECTOR_SIZE;
|
acb->hd_iov.iov_len = n_sectors * SECTOR_SIZE;
|
||||||
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
||||||
acb->hd_aiocb = bdrv_aio_writev(s->hd, offset, &acb->hd_qiov,
|
acb->hd_aiocb = bdrv_aio_writev(bs->file, offset, &acb->hd_qiov,
|
||||||
n_sectors, vdi_aio_write_cb, acb);
|
n_sectors, vdi_aio_write_cb, acb);
|
||||||
if (acb->hd_aiocb == NULL) {
|
if (acb->hd_aiocb == NULL) {
|
||||||
goto done;
|
goto done;
|
||||||
|
@ -891,16 +884,12 @@ static int vdi_create(const char *filename, QEMUOptionParameter *options)
|
||||||
|
|
||||||
static void vdi_close(BlockDriverState *bs)
|
static void vdi_close(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
BDRVVdiState *s = bs->opaque;
|
|
||||||
logout("\n");
|
|
||||||
bdrv_delete(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static void vdi_flush(BlockDriverState *bs)
|
static void vdi_flush(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
BDRVVdiState *s = bs->opaque;
|
|
||||||
logout("\n");
|
logout("\n");
|
||||||
bdrv_flush(s->hd);
|
bdrv_flush(bs->file);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
140
block/vmdk.c
140
block/vmdk.c
|
@ -76,7 +76,6 @@ typedef struct BDRVVmdkState {
|
||||||
|
|
||||||
unsigned int cluster_sectors;
|
unsigned int cluster_sectors;
|
||||||
uint32_t parent_cid;
|
uint32_t parent_cid;
|
||||||
int is_parent;
|
|
||||||
} BDRVVmdkState;
|
} BDRVVmdkState;
|
||||||
|
|
||||||
typedef struct VmdkMetaData {
|
typedef struct VmdkMetaData {
|
||||||
|
@ -87,14 +86,6 @@ typedef struct VmdkMetaData {
|
||||||
int valid;
|
int valid;
|
||||||
} VmdkMetaData;
|
} VmdkMetaData;
|
||||||
|
|
||||||
typedef struct ActiveBDRVState{
|
|
||||||
BlockDriverState *hd; // active image handler
|
|
||||||
uint64_t cluster_offset; // current write offset
|
|
||||||
}ActiveBDRVState;
|
|
||||||
|
|
||||||
static ActiveBDRVState activeBDRV;
|
|
||||||
|
|
||||||
|
|
||||||
static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename)
|
static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename)
|
||||||
{
|
{
|
||||||
uint32_t magic;
|
uint32_t magic;
|
||||||
|
@ -117,14 +108,13 @@ static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename)
|
||||||
|
|
||||||
static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent)
|
static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent)
|
||||||
{
|
{
|
||||||
BDRVVmdkState *s = bs->opaque;
|
|
||||||
char desc[DESC_SIZE];
|
char desc[DESC_SIZE];
|
||||||
uint32_t cid;
|
uint32_t cid;
|
||||||
const char *p_name, *cid_str;
|
const char *p_name, *cid_str;
|
||||||
size_t cid_str_size;
|
size_t cid_str_size;
|
||||||
|
|
||||||
/* the descriptor offset = 0x200 */
|
/* the descriptor offset = 0x200 */
|
||||||
if (bdrv_pread(s->hd, 0x200, desc, DESC_SIZE) != DESC_SIZE)
|
if (bdrv_pread(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE)
|
||||||
return 0;
|
return 0;
|
||||||
|
|
||||||
if (parent) {
|
if (parent) {
|
||||||
|
@ -145,12 +135,11 @@ static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent)
|
||||||
|
|
||||||
static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
|
static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
|
||||||
{
|
{
|
||||||
BDRVVmdkState *s = bs->opaque;
|
|
||||||
char desc[DESC_SIZE], tmp_desc[DESC_SIZE];
|
char desc[DESC_SIZE], tmp_desc[DESC_SIZE];
|
||||||
char *p_name, *tmp_str;
|
char *p_name, *tmp_str;
|
||||||
|
|
||||||
/* the descriptor offset = 0x200 */
|
/* the descriptor offset = 0x200 */
|
||||||
if (bdrv_pread(s->hd, 0x200, desc, DESC_SIZE) != DESC_SIZE)
|
if (bdrv_pread(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE)
|
||||||
return -1;
|
return -1;
|
||||||
|
|
||||||
tmp_str = strstr(desc,"parentCID");
|
tmp_str = strstr(desc,"parentCID");
|
||||||
|
@ -161,7 +150,7 @@ static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
|
||||||
pstrcat(desc, sizeof(desc), tmp_desc);
|
pstrcat(desc, sizeof(desc), tmp_desc);
|
||||||
}
|
}
|
||||||
|
|
||||||
if (bdrv_pwrite(s->hd, 0x200, desc, DESC_SIZE) != DESC_SIZE)
|
if (bdrv_pwrite(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE)
|
||||||
return -1;
|
return -1;
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
@ -346,27 +335,17 @@ fail:
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
static void vmdk_parent_close(BlockDriverState *bs)
|
static int vmdk_parent_open(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
if (bs->backing_hd)
|
|
||||||
bdrv_close(bs->backing_hd);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int parent_open = 0;
|
|
||||||
static int vmdk_parent_open(BlockDriverState *bs, const char * filename)
|
|
||||||
{
|
|
||||||
BDRVVmdkState *s = bs->opaque;
|
|
||||||
char *p_name;
|
char *p_name;
|
||||||
char desc[DESC_SIZE];
|
char desc[DESC_SIZE];
|
||||||
char parent_img_name[1024];
|
|
||||||
|
|
||||||
/* the descriptor offset = 0x200 */
|
/* the descriptor offset = 0x200 */
|
||||||
if (bdrv_pread(s->hd, 0x200, desc, DESC_SIZE) != DESC_SIZE)
|
if (bdrv_pread(bs->file, 0x200, desc, DESC_SIZE) != DESC_SIZE)
|
||||||
return -1;
|
return -1;
|
||||||
|
|
||||||
if ((p_name = strstr(desc,"parentFileNameHint")) != NULL) {
|
if ((p_name = strstr(desc,"parentFileNameHint")) != NULL) {
|
||||||
char *end_name;
|
char *end_name;
|
||||||
struct stat file_buf;
|
|
||||||
|
|
||||||
p_name += sizeof("parentFileNameHint") + 1;
|
p_name += sizeof("parentFileNameHint") + 1;
|
||||||
if ((end_name = strchr(p_name,'\"')) == NULL)
|
if ((end_name = strchr(p_name,'\"')) == NULL)
|
||||||
|
@ -375,51 +354,25 @@ static int vmdk_parent_open(BlockDriverState *bs, const char * filename)
|
||||||
return -1;
|
return -1;
|
||||||
|
|
||||||
pstrcpy(bs->backing_file, end_name - p_name + 1, p_name);
|
pstrcpy(bs->backing_file, end_name - p_name + 1, p_name);
|
||||||
if (stat(bs->backing_file, &file_buf) != 0) {
|
|
||||||
path_combine(parent_img_name, sizeof(parent_img_name),
|
|
||||||
filename, bs->backing_file);
|
|
||||||
} else {
|
|
||||||
pstrcpy(parent_img_name, sizeof(parent_img_name),
|
|
||||||
bs->backing_file);
|
|
||||||
}
|
|
||||||
|
|
||||||
bs->backing_hd = bdrv_new("");
|
|
||||||
if (!bs->backing_hd) {
|
|
||||||
failure:
|
|
||||||
bdrv_close(s->hd);
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
parent_open = 1;
|
|
||||||
if (bdrv_open(bs->backing_hd, parent_img_name, 0, NULL) < 0)
|
|
||||||
goto failure;
|
|
||||||
parent_open = 0;
|
|
||||||
}
|
}
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
static int vmdk_open(BlockDriverState *bs, const char *filename, int flags)
|
static int vmdk_open(BlockDriverState *bs, int flags)
|
||||||
{
|
{
|
||||||
BDRVVmdkState *s = bs->opaque;
|
BDRVVmdkState *s = bs->opaque;
|
||||||
uint32_t magic;
|
uint32_t magic;
|
||||||
int l1_size, i, ret;
|
int l1_size, i;
|
||||||
|
|
||||||
if (parent_open) {
|
if (bdrv_pread(bs->file, 0, &magic, sizeof(magic)) != sizeof(magic))
|
||||||
/* Parent must be opened as RO, no RDWR. */
|
|
||||||
flags = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
ret = bdrv_file_open(&s->hd, filename, flags);
|
|
||||||
if (ret < 0)
|
|
||||||
return ret;
|
|
||||||
if (bdrv_pread(s->hd, 0, &magic, sizeof(magic)) != sizeof(magic))
|
|
||||||
goto fail;
|
goto fail;
|
||||||
|
|
||||||
magic = be32_to_cpu(magic);
|
magic = be32_to_cpu(magic);
|
||||||
if (magic == VMDK3_MAGIC) {
|
if (magic == VMDK3_MAGIC) {
|
||||||
VMDK3Header header;
|
VMDK3Header header;
|
||||||
|
|
||||||
if (bdrv_pread(s->hd, sizeof(magic), &header, sizeof(header)) != sizeof(header))
|
if (bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)) != sizeof(header))
|
||||||
goto fail;
|
goto fail;
|
||||||
s->cluster_sectors = le32_to_cpu(header.granularity);
|
s->cluster_sectors = le32_to_cpu(header.granularity);
|
||||||
s->l2_size = 1 << 9;
|
s->l2_size = 1 << 9;
|
||||||
|
@ -431,7 +384,7 @@ static int vmdk_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
} else if (magic == VMDK4_MAGIC) {
|
} else if (magic == VMDK4_MAGIC) {
|
||||||
VMDK4Header header;
|
VMDK4Header header;
|
||||||
|
|
||||||
if (bdrv_pread(s->hd, sizeof(magic), &header, sizeof(header)) != sizeof(header))
|
if (bdrv_pread(bs->file, sizeof(magic), &header, sizeof(header)) != sizeof(header))
|
||||||
goto fail;
|
goto fail;
|
||||||
bs->total_sectors = le64_to_cpu(header.capacity);
|
bs->total_sectors = le64_to_cpu(header.capacity);
|
||||||
s->cluster_sectors = le64_to_cpu(header.granularity);
|
s->cluster_sectors = le64_to_cpu(header.granularity);
|
||||||
|
@ -444,13 +397,8 @@ static int vmdk_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
s->l1_table_offset = le64_to_cpu(header.rgd_offset) << 9;
|
s->l1_table_offset = le64_to_cpu(header.rgd_offset) << 9;
|
||||||
s->l1_backup_table_offset = le64_to_cpu(header.gd_offset) << 9;
|
s->l1_backup_table_offset = le64_to_cpu(header.gd_offset) << 9;
|
||||||
|
|
||||||
if (parent_open)
|
|
||||||
s->is_parent = 1;
|
|
||||||
else
|
|
||||||
s->is_parent = 0;
|
|
||||||
|
|
||||||
// try to open parent images, if exist
|
// try to open parent images, if exist
|
||||||
if (vmdk_parent_open(bs, filename) != 0)
|
if (vmdk_parent_open(bs) != 0)
|
||||||
goto fail;
|
goto fail;
|
||||||
// write the CID once after the image creation
|
// write the CID once after the image creation
|
||||||
s->parent_cid = vmdk_read_cid(bs,1);
|
s->parent_cid = vmdk_read_cid(bs,1);
|
||||||
|
@ -461,7 +409,7 @@ static int vmdk_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
/* read the L1 table */
|
/* read the L1 table */
|
||||||
l1_size = s->l1_size * sizeof(uint32_t);
|
l1_size = s->l1_size * sizeof(uint32_t);
|
||||||
s->l1_table = qemu_malloc(l1_size);
|
s->l1_table = qemu_malloc(l1_size);
|
||||||
if (bdrv_pread(s->hd, s->l1_table_offset, s->l1_table, l1_size) != l1_size)
|
if (bdrv_pread(bs->file, s->l1_table_offset, s->l1_table, l1_size) != l1_size)
|
||||||
goto fail;
|
goto fail;
|
||||||
for(i = 0; i < s->l1_size; i++) {
|
for(i = 0; i < s->l1_size; i++) {
|
||||||
le32_to_cpus(&s->l1_table[i]);
|
le32_to_cpus(&s->l1_table[i]);
|
||||||
|
@ -469,7 +417,7 @@ static int vmdk_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
|
|
||||||
if (s->l1_backup_table_offset) {
|
if (s->l1_backup_table_offset) {
|
||||||
s->l1_backup_table = qemu_malloc(l1_size);
|
s->l1_backup_table = qemu_malloc(l1_size);
|
||||||
if (bdrv_pread(s->hd, s->l1_backup_table_offset, s->l1_backup_table, l1_size) != l1_size)
|
if (bdrv_pread(bs->file, s->l1_backup_table_offset, s->l1_backup_table, l1_size) != l1_size)
|
||||||
goto fail;
|
goto fail;
|
||||||
for(i = 0; i < s->l1_size; i++) {
|
for(i = 0; i < s->l1_size; i++) {
|
||||||
le32_to_cpus(&s->l1_backup_table[i]);
|
le32_to_cpus(&s->l1_backup_table[i]);
|
||||||
|
@ -482,7 +430,6 @@ static int vmdk_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
qemu_free(s->l1_backup_table);
|
qemu_free(s->l1_backup_table);
|
||||||
qemu_free(s->l1_table);
|
qemu_free(s->l1_table);
|
||||||
qemu_free(s->l2_cache);
|
qemu_free(s->l2_cache);
|
||||||
bdrv_delete(s->hd);
|
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -492,30 +439,28 @@ static uint64_t get_cluster_offset(BlockDriverState *bs, VmdkMetaData *m_data,
|
||||||
static int get_whole_cluster(BlockDriverState *bs, uint64_t cluster_offset,
|
static int get_whole_cluster(BlockDriverState *bs, uint64_t cluster_offset,
|
||||||
uint64_t offset, int allocate)
|
uint64_t offset, int allocate)
|
||||||
{
|
{
|
||||||
uint64_t parent_cluster_offset;
|
|
||||||
BDRVVmdkState *s = bs->opaque;
|
BDRVVmdkState *s = bs->opaque;
|
||||||
uint8_t whole_grain[s->cluster_sectors*512]; // 128 sectors * 512 bytes each = grain size 64KB
|
uint8_t whole_grain[s->cluster_sectors*512]; // 128 sectors * 512 bytes each = grain size 64KB
|
||||||
|
|
||||||
// we will be here if it's first write on non-exist grain(cluster).
|
// we will be here if it's first write on non-exist grain(cluster).
|
||||||
// try to read from parent image, if exist
|
// try to read from parent image, if exist
|
||||||
if (bs->backing_hd) {
|
if (bs->backing_hd) {
|
||||||
BDRVVmdkState *ps = bs->backing_hd->opaque;
|
int ret;
|
||||||
|
|
||||||
if (!vmdk_is_cid_valid(bs))
|
if (!vmdk_is_cid_valid(bs))
|
||||||
return -1;
|
return -1;
|
||||||
|
|
||||||
parent_cluster_offset = get_cluster_offset(bs->backing_hd, NULL,
|
ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain,
|
||||||
offset, allocate);
|
s->cluster_sectors);
|
||||||
|
if (ret < 0) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
if (parent_cluster_offset) {
|
//Write grain only into the active image
|
||||||
BDRVVmdkState *act_s = activeBDRV.hd->opaque;
|
ret = bdrv_write(bs->file, cluster_offset, whole_grain,
|
||||||
|
s->cluster_sectors);
|
||||||
if (bdrv_pread(ps->hd, parent_cluster_offset, whole_grain, ps->cluster_sectors*512) != ps->cluster_sectors*512)
|
if (ret < 0) {
|
||||||
return -1;
|
return -1;
|
||||||
|
|
||||||
//Write grain only into the active image
|
|
||||||
if (bdrv_pwrite(act_s->hd, activeBDRV.cluster_offset << 9, whole_grain, sizeof(whole_grain)) != sizeof(whole_grain))
|
|
||||||
return -1;
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
return 0;
|
return 0;
|
||||||
|
@ -526,13 +471,13 @@ static int vmdk_L2update(BlockDriverState *bs, VmdkMetaData *m_data)
|
||||||
BDRVVmdkState *s = bs->opaque;
|
BDRVVmdkState *s = bs->opaque;
|
||||||
|
|
||||||
/* update L2 table */
|
/* update L2 table */
|
||||||
if (bdrv_pwrite(s->hd, ((int64_t)m_data->l2_offset * 512) + (m_data->l2_index * sizeof(m_data->offset)),
|
if (bdrv_pwrite(bs->file, ((int64_t)m_data->l2_offset * 512) + (m_data->l2_index * sizeof(m_data->offset)),
|
||||||
&(m_data->offset), sizeof(m_data->offset)) != sizeof(m_data->offset))
|
&(m_data->offset), sizeof(m_data->offset)) != sizeof(m_data->offset))
|
||||||
return -1;
|
return -1;
|
||||||
/* update backup L2 table */
|
/* update backup L2 table */
|
||||||
if (s->l1_backup_table_offset != 0) {
|
if (s->l1_backup_table_offset != 0) {
|
||||||
m_data->l2_offset = s->l1_backup_table[m_data->l1_index];
|
m_data->l2_offset = s->l1_backup_table[m_data->l1_index];
|
||||||
if (bdrv_pwrite(s->hd, ((int64_t)m_data->l2_offset * 512) + (m_data->l2_index * sizeof(m_data->offset)),
|
if (bdrv_pwrite(bs->file, ((int64_t)m_data->l2_offset * 512) + (m_data->l2_index * sizeof(m_data->offset)),
|
||||||
&(m_data->offset), sizeof(m_data->offset)) != sizeof(m_data->offset))
|
&(m_data->offset), sizeof(m_data->offset)) != sizeof(m_data->offset))
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
@ -580,7 +525,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs, VmdkMetaData *m_data,
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
l2_table = s->l2_cache + (min_index * s->l2_size);
|
l2_table = s->l2_cache + (min_index * s->l2_size);
|
||||||
if (bdrv_pread(s->hd, (int64_t)l2_offset * 512, l2_table, s->l2_size * sizeof(uint32_t)) !=
|
if (bdrv_pread(bs->file, (int64_t)l2_offset * 512, l2_table, s->l2_size * sizeof(uint32_t)) !=
|
||||||
s->l2_size * sizeof(uint32_t))
|
s->l2_size * sizeof(uint32_t))
|
||||||
return 0;
|
return 0;
|
||||||
|
|
||||||
|
@ -593,18 +538,15 @@ static uint64_t get_cluster_offset(BlockDriverState *bs, VmdkMetaData *m_data,
|
||||||
if (!cluster_offset) {
|
if (!cluster_offset) {
|
||||||
if (!allocate)
|
if (!allocate)
|
||||||
return 0;
|
return 0;
|
||||||
// Avoid the L2 tables update for the images that have snapshots.
|
|
||||||
if (!s->is_parent) {
|
|
||||||
cluster_offset = bdrv_getlength(s->hd);
|
|
||||||
bdrv_truncate(s->hd, cluster_offset + (s->cluster_sectors << 9));
|
|
||||||
|
|
||||||
cluster_offset >>= 9;
|
// Avoid the L2 tables update for the images that have snapshots.
|
||||||
tmp = cpu_to_le32(cluster_offset);
|
cluster_offset = bdrv_getlength(bs->file);
|
||||||
l2_table[l2_index] = tmp;
|
bdrv_truncate(bs->file, cluster_offset + (s->cluster_sectors << 9));
|
||||||
// Save the active image state
|
|
||||||
activeBDRV.cluster_offset = cluster_offset;
|
cluster_offset >>= 9;
|
||||||
activeBDRV.hd = bs;
|
tmp = cpu_to_le32(cluster_offset);
|
||||||
}
|
l2_table[l2_index] = tmp;
|
||||||
|
|
||||||
/* First of all we write grain itself, to avoid race condition
|
/* First of all we write grain itself, to avoid race condition
|
||||||
* that may to corrupt the image.
|
* that may to corrupt the image.
|
||||||
* This problem may occur because of insufficient space on host disk
|
* This problem may occur because of insufficient space on host disk
|
||||||
|
@ -666,7 +608,7 @@ static int vmdk_read(BlockDriverState *bs, int64_t sector_num,
|
||||||
memset(buf, 0, 512 * n);
|
memset(buf, 0, 512 * n);
|
||||||
}
|
}
|
||||||
} else {
|
} else {
|
||||||
if(bdrv_pread(s->hd, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512)
|
if(bdrv_pread(bs->file, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512)
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
nb_sectors -= n;
|
nb_sectors -= n;
|
||||||
|
@ -702,7 +644,7 @@ static int vmdk_write(BlockDriverState *bs, int64_t sector_num,
|
||||||
if (!cluster_offset)
|
if (!cluster_offset)
|
||||||
return -1;
|
return -1;
|
||||||
|
|
||||||
if (bdrv_pwrite(s->hd, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512)
|
if (bdrv_pwrite(bs->file, cluster_offset + index_in_cluster * 512, buf, n * 512) != n * 512)
|
||||||
return -1;
|
return -1;
|
||||||
if (m_data.valid) {
|
if (m_data.valid) {
|
||||||
/* update L2 tables */
|
/* update L2 tables */
|
||||||
|
@ -879,15 +821,11 @@ static void vmdk_close(BlockDriverState *bs)
|
||||||
|
|
||||||
qemu_free(s->l1_table);
|
qemu_free(s->l1_table);
|
||||||
qemu_free(s->l2_cache);
|
qemu_free(s->l2_cache);
|
||||||
// try to close parent image, if exist
|
|
||||||
vmdk_parent_close(s->hd);
|
|
||||||
bdrv_delete(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static void vmdk_flush(BlockDriverState *bs)
|
static void vmdk_flush(BlockDriverState *bs)
|
||||||
{
|
{
|
||||||
BDRVVmdkState *s = bs->opaque;
|
bdrv_flush(bs->file);
|
||||||
bdrv_flush(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
@ -914,7 +852,7 @@ static BlockDriver bdrv_vmdk = {
|
||||||
.format_name = "vmdk",
|
.format_name = "vmdk",
|
||||||
.instance_size = sizeof(BDRVVmdkState),
|
.instance_size = sizeof(BDRVVmdkState),
|
||||||
.bdrv_probe = vmdk_probe,
|
.bdrv_probe = vmdk_probe,
|
||||||
.bdrv_open = vmdk_open,
|
.bdrv_open = vmdk_open,
|
||||||
.bdrv_read = vmdk_read,
|
.bdrv_read = vmdk_read,
|
||||||
.bdrv_write = vmdk_write,
|
.bdrv_write = vmdk_write,
|
||||||
.bdrv_close = vmdk_close,
|
.bdrv_close = vmdk_close,
|
||||||
|
|
32
block/vpc.c
32
block/vpc.c
|
@ -150,20 +150,16 @@ static int vpc_probe(const uint8_t *buf, int buf_size, const char *filename)
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
static int vpc_open(BlockDriverState *bs, const char *filename, int flags)
|
static int vpc_open(BlockDriverState *bs, int flags)
|
||||||
{
|
{
|
||||||
BDRVVPCState *s = bs->opaque;
|
BDRVVPCState *s = bs->opaque;
|
||||||
int ret, i;
|
int i;
|
||||||
struct vhd_footer* footer;
|
struct vhd_footer* footer;
|
||||||
struct vhd_dyndisk_header* dyndisk_header;
|
struct vhd_dyndisk_header* dyndisk_header;
|
||||||
uint8_t buf[HEADER_SIZE];
|
uint8_t buf[HEADER_SIZE];
|
||||||
uint32_t checksum;
|
uint32_t checksum;
|
||||||
|
|
||||||
ret = bdrv_file_open(&s->hd, filename, flags);
|
if (bdrv_pread(bs->file, 0, s->footer_buf, HEADER_SIZE) != HEADER_SIZE)
|
||||||
if (ret < 0)
|
|
||||||
return ret;
|
|
||||||
|
|
||||||
if (bdrv_pread(s->hd, 0, s->footer_buf, HEADER_SIZE) != HEADER_SIZE)
|
|
||||||
goto fail;
|
goto fail;
|
||||||
|
|
||||||
footer = (struct vhd_footer*) s->footer_buf;
|
footer = (struct vhd_footer*) s->footer_buf;
|
||||||
|
@ -174,7 +170,7 @@ static int vpc_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
footer->checksum = 0;
|
footer->checksum = 0;
|
||||||
if (vpc_checksum(s->footer_buf, HEADER_SIZE) != checksum)
|
if (vpc_checksum(s->footer_buf, HEADER_SIZE) != checksum)
|
||||||
fprintf(stderr, "block-vpc: The header checksum of '%s' is "
|
fprintf(stderr, "block-vpc: The header checksum of '%s' is "
|
||||||
"incorrect.\n", filename);
|
"incorrect.\n", bs->filename);
|
||||||
|
|
||||||
// The visible size of a image in Virtual PC depends on the geometry
|
// The visible size of a image in Virtual PC depends on the geometry
|
||||||
// rather than on the size stored in the footer (the size in the footer
|
// rather than on the size stored in the footer (the size in the footer
|
||||||
|
@ -182,7 +178,7 @@ static int vpc_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
bs->total_sectors = (int64_t)
|
bs->total_sectors = (int64_t)
|
||||||
be16_to_cpu(footer->cyls) * footer->heads * footer->secs_per_cyl;
|
be16_to_cpu(footer->cyls) * footer->heads * footer->secs_per_cyl;
|
||||||
|
|
||||||
if (bdrv_pread(s->hd, be64_to_cpu(footer->data_offset), buf, HEADER_SIZE)
|
if (bdrv_pread(bs->file, be64_to_cpu(footer->data_offset), buf, HEADER_SIZE)
|
||||||
!= HEADER_SIZE)
|
!= HEADER_SIZE)
|
||||||
goto fail;
|
goto fail;
|
||||||
|
|
||||||
|
@ -199,7 +195,7 @@ static int vpc_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
s->pagetable = qemu_malloc(s->max_table_entries * 4);
|
s->pagetable = qemu_malloc(s->max_table_entries * 4);
|
||||||
|
|
||||||
s->bat_offset = be64_to_cpu(dyndisk_header->table_offset);
|
s->bat_offset = be64_to_cpu(dyndisk_header->table_offset);
|
||||||
if (bdrv_pread(s->hd, s->bat_offset, s->pagetable,
|
if (bdrv_pread(bs->file, s->bat_offset, s->pagetable,
|
||||||
s->max_table_entries * 4) != s->max_table_entries * 4)
|
s->max_table_entries * 4) != s->max_table_entries * 4)
|
||||||
goto fail;
|
goto fail;
|
||||||
|
|
||||||
|
@ -228,7 +224,6 @@ static int vpc_open(BlockDriverState *bs, const char *filename, int flags)
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
fail:
|
fail:
|
||||||
bdrv_delete(s->hd);
|
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -266,7 +261,7 @@ static inline int64_t get_sector_offset(BlockDriverState *bs,
|
||||||
|
|
||||||
s->last_bitmap_offset = bitmap_offset;
|
s->last_bitmap_offset = bitmap_offset;
|
||||||
memset(bitmap, 0xff, s->bitmap_size);
|
memset(bitmap, 0xff, s->bitmap_size);
|
||||||
bdrv_pwrite(s->hd, bitmap_offset, bitmap, s->bitmap_size);
|
bdrv_pwrite(bs->file, bitmap_offset, bitmap, s->bitmap_size);
|
||||||
}
|
}
|
||||||
|
|
||||||
// printf("sector: %" PRIx64 ", index: %x, offset: %x, bioff: %" PRIx64 ", bloff: %" PRIx64 "\n",
|
// printf("sector: %" PRIx64 ", index: %x, offset: %x, bioff: %" PRIx64 ", bloff: %" PRIx64 "\n",
|
||||||
|
@ -316,7 +311,7 @@ static int rewrite_footer(BlockDriverState* bs)
|
||||||
BDRVVPCState *s = bs->opaque;
|
BDRVVPCState *s = bs->opaque;
|
||||||
int64_t offset = s->free_data_block_offset;
|
int64_t offset = s->free_data_block_offset;
|
||||||
|
|
||||||
ret = bdrv_pwrite(s->hd, offset, s->footer_buf, HEADER_SIZE);
|
ret = bdrv_pwrite(bs->file, offset, s->footer_buf, HEADER_SIZE);
|
||||||
if (ret < 0)
|
if (ret < 0)
|
||||||
return ret;
|
return ret;
|
||||||
|
|
||||||
|
@ -351,7 +346,7 @@ static int64_t alloc_block(BlockDriverState* bs, int64_t sector_num)
|
||||||
|
|
||||||
// Initialize the block's bitmap
|
// Initialize the block's bitmap
|
||||||
memset(bitmap, 0xff, s->bitmap_size);
|
memset(bitmap, 0xff, s->bitmap_size);
|
||||||
bdrv_pwrite(s->hd, s->free_data_block_offset, bitmap, s->bitmap_size);
|
bdrv_pwrite(bs->file, s->free_data_block_offset, bitmap, s->bitmap_size);
|
||||||
|
|
||||||
// Write new footer (the old one will be overwritten)
|
// Write new footer (the old one will be overwritten)
|
||||||
s->free_data_block_offset += s->block_size + s->bitmap_size;
|
s->free_data_block_offset += s->block_size + s->bitmap_size;
|
||||||
|
@ -362,7 +357,7 @@ static int64_t alloc_block(BlockDriverState* bs, int64_t sector_num)
|
||||||
// Write BAT entry to disk
|
// Write BAT entry to disk
|
||||||
bat_offset = s->bat_offset + (4 * index);
|
bat_offset = s->bat_offset + (4 * index);
|
||||||
bat_value = be32_to_cpu(s->pagetable[index]);
|
bat_value = be32_to_cpu(s->pagetable[index]);
|
||||||
ret = bdrv_pwrite(s->hd, bat_offset, &bat_value, 4);
|
ret = bdrv_pwrite(bs->file, bat_offset, &bat_value, 4);
|
||||||
if (ret < 0)
|
if (ret < 0)
|
||||||
goto fail;
|
goto fail;
|
||||||
|
|
||||||
|
@ -376,7 +371,6 @@ fail:
|
||||||
static int vpc_read(BlockDriverState *bs, int64_t sector_num,
|
static int vpc_read(BlockDriverState *bs, int64_t sector_num,
|
||||||
uint8_t *buf, int nb_sectors)
|
uint8_t *buf, int nb_sectors)
|
||||||
{
|
{
|
||||||
BDRVVPCState *s = bs->opaque;
|
|
||||||
int ret;
|
int ret;
|
||||||
int64_t offset;
|
int64_t offset;
|
||||||
|
|
||||||
|
@ -386,7 +380,7 @@ static int vpc_read(BlockDriverState *bs, int64_t sector_num,
|
||||||
if (offset == -1) {
|
if (offset == -1) {
|
||||||
memset(buf, 0, 512);
|
memset(buf, 0, 512);
|
||||||
} else {
|
} else {
|
||||||
ret = bdrv_pread(s->hd, offset, buf, 512);
|
ret = bdrv_pread(bs->file, offset, buf, 512);
|
||||||
if (ret != 512)
|
if (ret != 512)
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
@ -401,7 +395,6 @@ static int vpc_read(BlockDriverState *bs, int64_t sector_num,
|
||||||
static int vpc_write(BlockDriverState *bs, int64_t sector_num,
|
static int vpc_write(BlockDriverState *bs, int64_t sector_num,
|
||||||
const uint8_t *buf, int nb_sectors)
|
const uint8_t *buf, int nb_sectors)
|
||||||
{
|
{
|
||||||
BDRVVPCState *s = bs->opaque;
|
|
||||||
int64_t offset;
|
int64_t offset;
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
|
@ -414,7 +407,7 @@ static int vpc_write(BlockDriverState *bs, int64_t sector_num,
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
||||||
ret = bdrv_pwrite(s->hd, offset, buf, 512);
|
ret = bdrv_pwrite(bs->file, offset, buf, 512);
|
||||||
if (ret != 512)
|
if (ret != 512)
|
||||||
return -1;
|
return -1;
|
||||||
|
|
||||||
|
@ -590,7 +583,6 @@ static void vpc_close(BlockDriverState *bs)
|
||||||
#ifdef CACHE
|
#ifdef CACHE
|
||||||
qemu_free(s->pageentry_u8);
|
qemu_free(s->pageentry_u8);
|
||||||
#endif
|
#endif
|
||||||
bdrv_delete(s->hd);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static QEMUOptionParameter vpc_create_options[] = {
|
static QEMUOptionParameter vpc_create_options[] = {
|
||||||
|
|
|
@ -2827,7 +2827,7 @@ static void vvfat_close(BlockDriverState *bs)
|
||||||
static BlockDriver bdrv_vvfat = {
|
static BlockDriver bdrv_vvfat = {
|
||||||
.format_name = "vvfat",
|
.format_name = "vvfat",
|
||||||
.instance_size = sizeof(BDRVVVFATState),
|
.instance_size = sizeof(BDRVVVFATState),
|
||||||
.bdrv_open = vvfat_open,
|
.bdrv_file_open = vvfat_open,
|
||||||
.bdrv_read = vvfat_read,
|
.bdrv_read = vvfat_read,
|
||||||
.bdrv_write = vvfat_write,
|
.bdrv_write = vvfat_write,
|
||||||
.bdrv_close = vvfat_close,
|
.bdrv_close = vvfat_close,
|
||||||
|
|
|
@ -51,7 +51,8 @@ struct BlockDriver {
|
||||||
int instance_size;
|
int instance_size;
|
||||||
int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);
|
int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);
|
||||||
int (*bdrv_probe_device)(const char *filename);
|
int (*bdrv_probe_device)(const char *filename);
|
||||||
int (*bdrv_open)(BlockDriverState *bs, const char *filename, int flags);
|
int (*bdrv_open)(BlockDriverState *bs, int flags);
|
||||||
|
int (*bdrv_file_open)(BlockDriverState *bs, const char *filename, int flags);
|
||||||
int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num,
|
int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num,
|
||||||
uint8_t *buf, int nb_sectors);
|
uint8_t *buf, int nb_sectors);
|
||||||
int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num,
|
int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num,
|
||||||
|
@ -155,6 +156,8 @@ struct BlockDriverState {
|
||||||
int media_changed;
|
int media_changed;
|
||||||
|
|
||||||
BlockDriverState *backing_hd;
|
BlockDriverState *backing_hd;
|
||||||
|
BlockDriverState *file;
|
||||||
|
|
||||||
/* async read/write emulation */
|
/* async read/write emulation */
|
||||||
|
|
||||||
void *sync_aiocb;
|
void *sync_aiocb;
|
||||||
|
@ -164,6 +167,7 @@ struct BlockDriverState {
|
||||||
uint64_t wr_bytes;
|
uint64_t wr_bytes;
|
||||||
uint64_t rd_ops;
|
uint64_t rd_ops;
|
||||||
uint64_t wr_ops;
|
uint64_t wr_ops;
|
||||||
|
uint64_t wr_highest_sector;
|
||||||
|
|
||||||
/* Whether the disk can expand beyond total_sectors */
|
/* Whether the disk can expand beyond total_sectors */
|
||||||
int growable;
|
int growable;
|
||||||
|
|
|
@ -49,5 +49,11 @@ DEF("rebase", img_rebase,
|
||||||
"rebase [-f fmt] [-u] -b backing_file [-F backing_fmt] filename")
|
"rebase [-f fmt] [-u] -b backing_file [-F backing_fmt] filename")
|
||||||
STEXI
|
STEXI
|
||||||
@item rebase [-f @var{fmt}] [-u] -b @var{backing_file} [-F @var{backing_fmt}] @var{filename}
|
@item rebase [-f @var{fmt}] [-u] -b @var{backing_file} [-F @var{backing_fmt}] @var{filename}
|
||||||
|
ETEXI
|
||||||
|
|
||||||
|
DEF("resize", img_resize,
|
||||||
|
"resize filename [+ | -]size")
|
||||||
|
STEXI
|
||||||
|
@item rebase @var{filename} [+ | -]@var{size}
|
||||||
@end table
|
@end table
|
||||||
ETEXI
|
ETEXI
|
||||||
|
|
104
qemu-img.c
104
qemu-img.c
|
@ -732,6 +732,8 @@ static int img_convert(int argc, char **argv)
|
||||||
/* signal EOF to align */
|
/* signal EOF to align */
|
||||||
bdrv_write_compressed(out_bs, 0, NULL, 0);
|
bdrv_write_compressed(out_bs, 0, NULL, 0);
|
||||||
} else {
|
} else {
|
||||||
|
int has_zero_init = bdrv_has_zero_init(out_bs);
|
||||||
|
|
||||||
sector_num = 0; // total number of sectors converted so far
|
sector_num = 0; // total number of sectors converted so far
|
||||||
for(;;) {
|
for(;;) {
|
||||||
nb_sectors = total_sectors - sector_num;
|
nb_sectors = total_sectors - sector_num;
|
||||||
|
@ -755,7 +757,7 @@ static int img_convert(int argc, char **argv)
|
||||||
if (n > bs_offset + bs_sectors - sector_num)
|
if (n > bs_offset + bs_sectors - sector_num)
|
||||||
n = bs_offset + bs_sectors - sector_num;
|
n = bs_offset + bs_sectors - sector_num;
|
||||||
|
|
||||||
if (!drv->no_zero_init) {
|
if (has_zero_init) {
|
||||||
/* If the output image is being created as a copy on write image,
|
/* If the output image is being created as a copy on write image,
|
||||||
assume that sectors which are unallocated in the input image
|
assume that sectors which are unallocated in the input image
|
||||||
are present in both the output's and input's base images (no
|
are present in both the output's and input's base images (no
|
||||||
|
@ -788,7 +790,7 @@ static int img_convert(int argc, char **argv)
|
||||||
If the output is to a host device, we also write out
|
If the output is to a host device, we also write out
|
||||||
sectors that are entirely 0, since whatever data was
|
sectors that are entirely 0, since whatever data was
|
||||||
already there is garbage, not 0s. */
|
already there is garbage, not 0s. */
|
||||||
if (drv->no_zero_init || out_baseimg ||
|
if (!has_zero_init || out_baseimg ||
|
||||||
is_allocated_sectors(buf1, n, &n1)) {
|
is_allocated_sectors(buf1, n, &n1)) {
|
||||||
if (bdrv_write(out_bs, sector_num, buf1, n1) < 0)
|
if (bdrv_write(out_bs, sector_num, buf1, n1) < 0)
|
||||||
error("error while writing");
|
error("error while writing");
|
||||||
|
@ -1134,7 +1136,7 @@ static int img_rebase(int argc, char **argv)
|
||||||
if (!unsafe) {
|
if (!unsafe) {
|
||||||
uint64_t num_sectors;
|
uint64_t num_sectors;
|
||||||
uint64_t sector;
|
uint64_t sector;
|
||||||
int n, n1;
|
int n;
|
||||||
uint8_t * buf_old;
|
uint8_t * buf_old;
|
||||||
uint8_t * buf_new;
|
uint8_t * buf_new;
|
||||||
|
|
||||||
|
@ -1153,8 +1155,8 @@ static int img_rebase(int argc, char **argv)
|
||||||
}
|
}
|
||||||
|
|
||||||
/* If the cluster is allocated, we don't need to take action */
|
/* If the cluster is allocated, we don't need to take action */
|
||||||
if (bdrv_is_allocated(bs, sector, n, &n1)) {
|
ret = bdrv_is_allocated(bs, sector, n, &n);
|
||||||
n = n1;
|
if (ret) {
|
||||||
continue;
|
continue;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1223,6 +1225,98 @@ static int img_rebase(int argc, char **argv)
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int img_resize(int argc, char **argv)
|
||||||
|
{
|
||||||
|
int c, ret, relative;
|
||||||
|
const char *filename, *fmt, *size;
|
||||||
|
int64_t n, total_size;
|
||||||
|
BlockDriverState *bs;
|
||||||
|
QEMUOptionParameter *param;
|
||||||
|
QEMUOptionParameter resize_options[] = {
|
||||||
|
{
|
||||||
|
.name = BLOCK_OPT_SIZE,
|
||||||
|
.type = OPT_SIZE,
|
||||||
|
.help = "Virtual disk size"
|
||||||
|
},
|
||||||
|
{ NULL }
|
||||||
|
};
|
||||||
|
|
||||||
|
fmt = NULL;
|
||||||
|
for(;;) {
|
||||||
|
c = getopt(argc, argv, "f:h");
|
||||||
|
if (c == -1) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
switch(c) {
|
||||||
|
case 'h':
|
||||||
|
help();
|
||||||
|
break;
|
||||||
|
case 'f':
|
||||||
|
fmt = optarg;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (optind + 1 >= argc) {
|
||||||
|
help();
|
||||||
|
}
|
||||||
|
filename = argv[optind++];
|
||||||
|
size = argv[optind++];
|
||||||
|
|
||||||
|
/* Choose grow, shrink, or absolute resize mode */
|
||||||
|
switch (size[0]) {
|
||||||
|
case '+':
|
||||||
|
relative = 1;
|
||||||
|
size++;
|
||||||
|
break;
|
||||||
|
case '-':
|
||||||
|
relative = -1;
|
||||||
|
size++;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
relative = 0;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Parse size */
|
||||||
|
param = parse_option_parameters("", resize_options, NULL);
|
||||||
|
if (set_option_parameter(param, BLOCK_OPT_SIZE, size)) {
|
||||||
|
/* Error message already printed when size parsing fails */
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
n = get_option_parameter(param, BLOCK_OPT_SIZE)->value.n;
|
||||||
|
free_option_parameters(param);
|
||||||
|
|
||||||
|
bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR);
|
||||||
|
|
||||||
|
if (relative) {
|
||||||
|
total_size = bdrv_getlength(bs) + n * relative;
|
||||||
|
} else {
|
||||||
|
total_size = n;
|
||||||
|
}
|
||||||
|
if (total_size <= 0) {
|
||||||
|
error("New image size must be positive");
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = bdrv_truncate(bs, total_size);
|
||||||
|
switch (ret) {
|
||||||
|
case 0:
|
||||||
|
printf("Image resized.\n");
|
||||||
|
break;
|
||||||
|
case -ENOTSUP:
|
||||||
|
error("This image format does not support resize");
|
||||||
|
break;
|
||||||
|
case -EACCES:
|
||||||
|
error("Image is read-only");
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
error("Error resizing image (%d)", -ret);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
bdrv_delete(bs);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
static const img_cmd_t img_cmds[] = {
|
static const img_cmd_t img_cmds[] = {
|
||||||
#define DEF(option, callback, arg_string) \
|
#define DEF(option, callback, arg_string) \
|
||||||
{ option, callback },
|
{ option, callback },
|
||||||
|
|
|
@ -106,6 +106,18 @@ they are displayed too.
|
||||||
@item snapshot [-l | -a @var{snapshot} | -c @var{snapshot} | -d @var{snapshot} ] @var{filename}
|
@item snapshot [-l | -a @var{snapshot} | -c @var{snapshot} | -d @var{snapshot} ] @var{filename}
|
||||||
|
|
||||||
List, apply, create or delete snapshots in image @var{filename}.
|
List, apply, create or delete snapshots in image @var{filename}.
|
||||||
|
|
||||||
|
@item resize @var{filename} [+ | -]@var{size}
|
||||||
|
|
||||||
|
Change the disk image as if it had been created with @var{size}.
|
||||||
|
|
||||||
|
Before using this command to shrink a disk image, you MUST use file system and
|
||||||
|
partitioning tools inside the VM to reduce allocated file systems and partition
|
||||||
|
sizes accordingly. Failure to do so will result in data loss!
|
||||||
|
|
||||||
|
After using this command to grow a disk image, you must use file system and
|
||||||
|
partitioning tools inside the VM to actually begin using the new space on the
|
||||||
|
device.
|
||||||
@end table
|
@end table
|
||||||
|
|
||||||
Supported image file formats:
|
Supported image file formats:
|
||||||
|
|
Loading…
Reference in New Issue