* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
+#include "qemu/osdep.h"
+#include "qapi/error.h"
#include "qemu-common.h"
#include "block/block_int.h"
+#include "sysemu/block-backend.h"
#include "qemu/module.h"
#include "migration/migration.h"
#if defined(CONFIG_UUID)
VHD_DIFFERENCING = 4,
};
-// Seconds since Jan 1, 2000 0:00:00 (UTC)
+/* Seconds since Jan 1, 2000 0:00:00 (UTC) */
#define VHD_TIMESTAMP_BASE 946684800
-#define VHD_MAX_SECTORS (65535LL * 255 * 255)
-#define VHD_MAX_GEOMETRY (65535LL * 16 * 255)
+#define VHD_CHS_MAX_C 65535LL
+#define VHD_CHS_MAX_H 16
+#define VHD_CHS_MAX_S 255
-// always big-endian
+#define VHD_MAX_SECTORS 0xff000000 /* 2040 GiB max image size */
+#define VHD_MAX_GEOMETRY (VHD_CHS_MAX_C * VHD_CHS_MAX_H * VHD_CHS_MAX_S)
+
+#define VPC_OPT_FORCE_SIZE "force_size"
+
+/* always big-endian */
typedef struct vhd_footer {
- char creator[8]; // "conectix"
+ char creator[8]; /* "conectix" */
uint32_t features;
uint32_t version;
- // Offset of next header structure, 0xFFFFFFFF if none
+ /* Offset of next header structure, 0xFFFFFFFF if none */
uint64_t data_offset;
- // Seconds since Jan 1, 2000 0:00:00 (UTC)
+ /* Seconds since Jan 1, 2000 0:00:00 (UTC) */
uint32_t timestamp;
- char creator_app[4]; // "vpc "
+ char creator_app[4]; /* e.g., "vpc " */
uint16_t major;
uint16_t minor;
- char creator_os[4]; // "Wi2k"
+ char creator_os[4]; /* "Wi2k" */
uint64_t orig_size;
uint64_t current_size;
uint32_t type;
- // Checksum of the Hard Disk Footer ("one's complement of the sum of all
- // the bytes in the footer without the checksum field")
+ /* Checksum of the Hard Disk Footer ("one's complement of the sum of all
+ the bytes in the footer without the checksum field") */
uint32_t checksum;
- // UUID used to identify a parent hard disk (backing file)
+ /* UUID used to identify a parent hard disk (backing file) */
uint8_t uuid[16];
uint8_t in_saved_state;
} QEMU_PACKED VHDFooter;
typedef struct vhd_dyndisk_header {
- char magic[8]; // "cxsparse"
+ char magic[8]; /* "cxsparse" */
- // Offset of next header structure, 0xFFFFFFFF if none
+ /* Offset of next header structure, 0xFFFFFFFF if none */
uint64_t data_offset;
- // Offset of the Block Allocation Table (BAT)
+ /* Offset of the Block Allocation Table (BAT) */
uint64_t table_offset;
uint32_t version;
- uint32_t max_table_entries; // 32bit/entry
+ uint32_t max_table_entries; /* 32bit/entry */
- // 2 MB by default, must be a power of two
+ /* 2 MB by default, must be a power of two */
uint32_t block_size;
uint32_t checksum;
uint32_t parent_timestamp;
uint32_t reserved;
- // Backing file name (in UTF-16)
+ /* Backing file name (in UTF-16) */
uint8_t parent_name[512];
struct {
uint32_t block_size;
uint32_t bitmap_size;
+ bool force_use_chs;
+ bool force_use_sz;
#ifdef CACHE
uint8_t *pageentry_u8;
Error *migration_blocker;
} BDRVVPCState;
+#define VPC_OPT_SIZE_CALC "force_size_calc"
+static QemuOptsList vpc_runtime_opts = {
+ .name = "vpc-runtime-opts",
+ .head = QTAILQ_HEAD_INITIALIZER(vpc_runtime_opts.head),
+ .desc = {
+ {
+ .name = VPC_OPT_SIZE_CALC,
+ .type = QEMU_OPT_STRING,
+ .help = "Force disk size calculation to use either CHS geometry, "
+ "or use the disk current_size specified in the VHD footer. "
+ "{chs, current_size}"
+ },
+ { /* end of list */ }
+ }
+};
+
static uint32_t vpc_checksum(uint8_t* buf, size_t size)
{
uint32_t res = 0;
return 0;
}
+static void vpc_parse_options(BlockDriverState *bs, QemuOpts *opts,
+ Error **errp)
+{
+ BDRVVPCState *s = bs->opaque;
+ const char *size_calc;
+
+ size_calc = qemu_opt_get(opts, VPC_OPT_SIZE_CALC);
+
+ if (!size_calc) {
+ /* no override, use autodetect only */
+ } else if (!strcmp(size_calc, "current_size")) {
+ s->force_use_sz = true;
+ } else if (!strcmp(size_calc, "chs")) {
+ s->force_use_chs = true;
+ } else {
+ error_setg(errp, "Invalid size calculation mode: '%s'", size_calc);
+ }
+}
+
static int vpc_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
int i;
VHDFooter *footer;
VHDDynDiskHeader *dyndisk_header;
+ QemuOpts *opts = NULL;
+ Error *local_err = NULL;
+ bool use_chs;
uint8_t buf[HEADER_SIZE];
uint32_t checksum;
uint64_t computed_size;
int disk_type = VHD_DYNAMIC;
int ret;
- ret = bdrv_pread(bs->file, 0, s->footer_buf, HEADER_SIZE);
+ opts = qemu_opts_create(&vpc_runtime_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(opts, options, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ vpc_parse_options(bs, opts, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ ret = bdrv_pread(bs->file->bs, 0, s->footer_buf, HEADER_SIZE);
if (ret < 0) {
+ error_setg(errp, "Unable to read VHD header");
goto fail;
}
footer = (VHDFooter *) s->footer_buf;
if (strncmp(footer->creator, "conectix", 8)) {
- int64_t offset = bdrv_getlength(bs->file);
+ int64_t offset = bdrv_getlength(bs->file->bs);
if (offset < 0) {
ret = offset;
+ error_setg(errp, "Invalid file size");
goto fail;
} else if (offset < HEADER_SIZE) {
ret = -EINVAL;
+ error_setg(errp, "File too small for a VHD header");
goto fail;
}
/* If a fixed disk, the footer is found only at the end of the file */
- ret = bdrv_pread(bs->file, offset-HEADER_SIZE, s->footer_buf,
+ ret = bdrv_pread(bs->file->bs, offset-HEADER_SIZE, s->footer_buf,
HEADER_SIZE);
if (ret < 0) {
goto fail;
/* Write 'checksum' back to footer, or else will leave it with zero. */
footer->checksum = cpu_to_be32(checksum);
- // 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
- // is too large usually)
+ /* 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
+ is too large usually) */
bs->total_sectors = (int64_t)
be16_to_cpu(footer->cyls) * footer->heads * footer->secs_per_cyl;
- /* Images that have exactly the maximum geometry are probably bigger and
- * would be truncated if we adhered to the geometry for them. Rely on
- * footer->current_size for them. */
- if (bs->total_sectors == VHD_MAX_GEOMETRY) {
+ /* Microsoft Virtual PC and Microsoft Hyper-V produce and read
+ * VHD image sizes differently. VPC will rely on CHS geometry,
+ * while Hyper-V and disk2vhd use the size specified in the footer.
+ *
+ * We use a couple of approaches to try and determine the correct method:
+ * look at the Creator App field, and look for images that have CHS
+ * geometry that is the maximum value.
+ *
+ * If the CHS geometry is the maximum CHS geometry, then we assume that
+ * the size is the footer->current_size to avoid truncation. Otherwise,
+ * we follow the table based on footer->creator_app:
+ *
+ * Known creator apps:
+ * 'vpc ' : CHS Virtual PC (uses disk geometry)
+ * 'qemu' : CHS QEMU (uses disk geometry)
+ * 'qem2' : current_size QEMU (uses current_size)
+ * 'win ' : current_size Hyper-V
+ * 'd2v ' : current_size Disk2vhd
+ * 'tap\0' : current_size XenServer
+ * 'CTXS' : current_size XenConverter
+ *
+ * The user can override the table values via drive options, however
+ * even with an override we will still use current_size for images
+ * that have CHS geometry of the maximum size.
+ */
+ use_chs = (!!strncmp(footer->creator_app, "win ", 4) &&
+ !!strncmp(footer->creator_app, "qem2", 4) &&
+ !!strncmp(footer->creator_app, "d2v ", 4) &&
+ !!strncmp(footer->creator_app, "CTXS", 4) &&
+ !!memcmp(footer->creator_app, "tap", 4)) || s->force_use_chs;
+
+ if (!use_chs || bs->total_sectors == VHD_MAX_GEOMETRY || s->force_use_sz) {
bs->total_sectors = be64_to_cpu(footer->current_size) /
- BDRV_SECTOR_SIZE;
+ BDRV_SECTOR_SIZE;
}
- /* Allow a maximum disk size of approximately 2 TB */
- if (bs->total_sectors >= VHD_MAX_SECTORS) {
+ /* Allow a maximum disk size of 2040 GiB */
+ if (bs->total_sectors > VHD_MAX_SECTORS) {
ret = -EFBIG;
goto fail;
}
if (disk_type == VHD_DYNAMIC) {
- ret = bdrv_pread(bs->file, be64_to_cpu(footer->data_offset), buf,
+ ret = bdrv_pread(bs->file->bs, be64_to_cpu(footer->data_offset), buf,
HEADER_SIZE);
if (ret < 0) {
+ error_setg(errp, "Error reading dynamic VHD header");
goto fail;
}
dyndisk_header = (VHDDynDiskHeader *) buf;
if (strncmp(dyndisk_header->magic, "cxsparse", 8)) {
+ error_setg(errp, "Invalid header magic");
ret = -EINVAL;
goto fail;
}
s->max_table_entries = be32_to_cpu(dyndisk_header->max_table_entries);
if ((bs->total_sectors * 512) / s->block_size > 0xffffffffU) {
- ret = -EINVAL;
- goto fail;
- }
- if (s->max_table_entries > (VHD_MAX_SECTORS * 512) / s->block_size) {
+ error_setg(errp, "Too many blocks");
ret = -EINVAL;
goto fail;
}
computed_size = (uint64_t) s->max_table_entries * s->block_size;
if (computed_size < bs->total_sectors * 512) {
+ error_setg(errp, "Page table too small");
ret = -EINVAL;
goto fail;
}
pagetable_size = (uint64_t) s->max_table_entries * 4;
- s->pagetable = qemu_try_blockalign(bs->file, pagetable_size);
+ s->pagetable = qemu_try_blockalign(bs->file->bs, pagetable_size);
if (s->pagetable == NULL) {
+ error_setg(errp, "Unable to allocate memory for page table");
ret = -ENOMEM;
goto fail;
}
s->bat_offset = be64_to_cpu(dyndisk_header->table_offset);
- ret = bdrv_pread(bs->file, s->bat_offset, s->pagetable, pagetable_size);
+ ret = bdrv_pread(bs->file->bs, s->bat_offset, s->pagetable,
+ pagetable_size);
if (ret < 0) {
+ error_setg(errp, "Error reading pagetable");
goto fail;
}
}
}
- if (s->free_data_block_offset > bdrv_getlength(bs->file)) {
+ if (s->free_data_block_offset > bdrv_getlength(bs->file->bs)) {
error_setg(errp, "block-vpc: free_data_block_offset points after "
"the end of file. The image has been truncated.");
ret = -EINVAL;
pageentry_index = (offset % s->block_size) / 512;
if (pagetable_index >= s->max_table_entries || s->pagetable[pagetable_index] == 0xffffffff)
- return -1; // not allocated
+ return -1; /* not allocated */
bitmap_offset = 512 * (uint64_t) s->pagetable[pagetable_index];
block_offset = bitmap_offset + s->bitmap_size + (512 * pageentry_index);
- // We must ensure that we don't write to any sectors which are marked as
- // unused in the bitmap. We get away with setting all bits in the block
- // bitmap each time we write to a new block. This might cause Virtual PC to
- // miss sparse read optimization, but it's not a problem in terms of
- // correctness.
+ /* We must ensure that we don't write to any sectors which are marked as
+ unused in the bitmap. We get away with setting all bits in the block
+ bitmap each time we write to a new block. This might cause Virtual PC to
+ miss sparse read optimization, but it's not a problem in terms of
+ correctness. */
if (write && (s->last_bitmap_offset != bitmap_offset)) {
uint8_t bitmap[s->bitmap_size];
s->last_bitmap_offset = bitmap_offset;
memset(bitmap, 0xff, s->bitmap_size);
- bdrv_pwrite_sync(bs->file, bitmap_offset, bitmap, s->bitmap_size);
+ bdrv_pwrite_sync(bs->file->bs, bitmap_offset, bitmap, s->bitmap_size);
}
return block_offset;
BDRVVPCState *s = bs->opaque;
int64_t offset = s->free_data_block_offset;
- ret = bdrv_pwrite_sync(bs->file, offset, s->footer_buf, HEADER_SIZE);
+ ret = bdrv_pwrite_sync(bs->file->bs, offset, s->footer_buf, HEADER_SIZE);
if (ret < 0)
return ret;
int ret;
uint8_t bitmap[s->bitmap_size];
- // Check if sector_num is valid
+ /* Check if sector_num is valid */
if ((sector_num < 0) || (sector_num > bs->total_sectors))
return -1;
- // Write entry into in-memory BAT
+ /* Write entry into in-memory BAT */
index = (sector_num * 512) / s->block_size;
if (s->pagetable[index] != 0xFFFFFFFF)
return -1;
s->pagetable[index] = s->free_data_block_offset / 512;
- // Initialize the block's bitmap
+ /* Initialize the block's bitmap */
memset(bitmap, 0xff, s->bitmap_size);
- ret = bdrv_pwrite_sync(bs->file, s->free_data_block_offset, bitmap,
+ ret = bdrv_pwrite_sync(bs->file->bs, s->free_data_block_offset, bitmap,
s->bitmap_size);
if (ret < 0) {
return ret;
}
- // 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;
ret = rewrite_footer(bs);
if (ret < 0)
goto fail;
- // Write BAT entry to disk
+ /* Write BAT entry to disk */
bat_offset = s->bat_offset + (4 * index);
bat_value = cpu_to_be32(s->pagetable[index]);
- ret = bdrv_pwrite_sync(bs->file, bat_offset, &bat_value, 4);
+ ret = bdrv_pwrite_sync(bs->file->bs, bat_offset, &bat_value, 4);
if (ret < 0)
goto fail;
VHDFooter *footer = (VHDFooter *) s->footer_buf;
if (be32_to_cpu(footer->type) == VHD_FIXED) {
- return bdrv_read(bs->file, sector_num, buf, nb_sectors);
+ return bdrv_read(bs->file->bs, sector_num, buf, nb_sectors);
}
while (nb_sectors > 0) {
offset = get_sector_offset(bs, sector_num, 0);
if (offset == -1) {
memset(buf, 0, sectors * BDRV_SECTOR_SIZE);
} else {
- ret = bdrv_pread(bs->file, offset, buf,
+ ret = bdrv_pread(bs->file->bs, offset, buf,
sectors * BDRV_SECTOR_SIZE);
if (ret != sectors * BDRV_SECTOR_SIZE) {
return -1;
VHDFooter *footer = (VHDFooter *) s->footer_buf;
if (be32_to_cpu(footer->type) == VHD_FIXED) {
- return bdrv_write(bs->file, sector_num, buf, nb_sectors);
+ return bdrv_write(bs->file->bs, sector_num, buf, nb_sectors);
}
while (nb_sectors > 0) {
offset = get_sector_offset(bs, sector_num, 1);
return -1;
}
- ret = bdrv_pwrite(bs->file, offset, buf, sectors * BDRV_SECTOR_SIZE);
+ ret = bdrv_pwrite(bs->file->bs, offset, buf,
+ sectors * BDRV_SECTOR_SIZE);
if (ret != sectors * BDRV_SECTOR_SIZE) {
return -1;
}
}
static int64_t coroutine_fn vpc_co_get_block_status(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, int *pnum)
+ int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file)
{
BDRVVPCState *s = bs->opaque;
VHDFooter *footer = (VHDFooter*) s->footer_buf;
if (be32_to_cpu(footer->type) == VHD_FIXED) {
*pnum = nb_sectors;
+ *file = bs->file->bs;
return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | BDRV_BLOCK_DATA |
(sector_num << BDRV_SECTOR_BITS);
}
/* *pnum can't be greater than one block for allocated
* sectors since there is always a bitmap in between. */
if (allocated) {
+ *file = bs->file->bs;
return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start;
}
if (nb_sectors == 0) {
* Note that the geometry doesn't always exactly match total_sectors but
* may round it down.
*
- * Returns 0 on success, -EFBIG if the size is larger than ~2 TB. Override
+ * Returns 0 on success, -EFBIG if the size is larger than 2040 GiB. Override
* the hardware EIDE and ATA-2 limit of 16 heads (max disk size of 127 GB)
* and instead allow up to 255 heads.
*/
return 0;
}
-static int create_dynamic_disk(BlockDriverState *bs, uint8_t *buf,
+static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf,
int64_t total_sectors)
{
VHDDynDiskHeader *dyndisk_header =
int ret;
int64_t offset = 0;
- // Write the footer (twice: at the beginning and at the end)
+ /* Write the footer (twice: at the beginning and at the end) */
block_size = 0x200000;
num_bat_entries = (total_sectors + block_size / 512) / (block_size / 512);
- ret = bdrv_pwrite_sync(bs, offset, buf, HEADER_SIZE);
- if (ret) {
+ ret = blk_pwrite(blk, offset, buf, HEADER_SIZE);
+ if (ret < 0) {
goto fail;
}
offset = 1536 + ((num_bat_entries * 4 + 511) & ~511);
- ret = bdrv_pwrite_sync(bs, offset, buf, HEADER_SIZE);
+ ret = blk_pwrite(blk, offset, buf, HEADER_SIZE);
if (ret < 0) {
goto fail;
}
- // Write the initial BAT
+ /* Write the initial BAT */
offset = 3 * 512;
memset(buf, 0xFF, 512);
for (i = 0; i < (num_bat_entries * 4 + 511) / 512; i++) {
- ret = bdrv_pwrite_sync(bs, offset, buf, 512);
+ ret = blk_pwrite(blk, offset, buf, 512);
if (ret < 0) {
goto fail;
}
offset += 512;
}
- // Prepare the Dynamic Disk Header
+ /* Prepare the Dynamic Disk Header */
memset(buf, 0, 1024);
memcpy(dyndisk_header->magic, "cxsparse", 8);
dyndisk_header->checksum = cpu_to_be32(vpc_checksum(buf, 1024));
- // Write the header
+ /* Write the header */
offset = 512;
- ret = bdrv_pwrite_sync(bs, offset, buf, 1024);
+ ret = blk_pwrite(blk, offset, buf, 1024);
if (ret < 0) {
goto fail;
}
return ret;
}
-static int create_fixed_disk(BlockDriverState *bs, uint8_t *buf,
+static int create_fixed_disk(BlockBackend *blk, uint8_t *buf,
int64_t total_size)
{
int ret;
/* Add footer to total size */
total_size += HEADER_SIZE;
- ret = bdrv_truncate(bs, total_size);
+ ret = blk_truncate(blk, total_size);
if (ret < 0) {
return ret;
}
- ret = bdrv_pwrite_sync(bs, total_size - HEADER_SIZE, buf, HEADER_SIZE);
+ ret = blk_pwrite(blk, total_size - HEADER_SIZE, buf, HEADER_SIZE);
if (ret < 0) {
return ret;
}
int64_t total_size;
int disk_type;
int ret = -EIO;
+ bool force_size;
Error *local_err = NULL;
- BlockDriverState *bs = NULL;
+ BlockBackend *blk = NULL;
/* Read out options */
total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
} else if (!strcmp(disk_type_param, "fixed")) {
disk_type = VHD_FIXED;
} else {
+ error_setg(errp, "Invalid disk type, %s", disk_type_param);
ret = -EINVAL;
goto out;
}
disk_type = VHD_DYNAMIC;
}
+ force_size = qemu_opt_get_bool_del(opts, VPC_OPT_FORCE_SIZE, false);
+
ret = bdrv_create_file(filename, opts, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
}
- ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- NULL, &local_err);
- if (ret < 0) {
+
+ blk = blk_new_open(filename, NULL, NULL,
+ BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
+ if (blk == NULL) {
error_propagate(errp, local_err);
+ ret = -EIO;
goto out;
}
+ blk_set_allow_write_beyond_eof(blk, true);
+
/*
* Calculate matching total_size and geometry. Increase the number of
* sectors requested until we get enough (or fail). This ensures that
* qemu-img convert doesn't truncate images, but rather rounds up.
*
- * If the image size can't be represented by a spec conform CHS geometry,
+ * If the image size can't be represented by a spec conformant CHS geometry,
* we set the geometry to 65535 x 16 x 255 (CxHxS) sectors and use
* the image size from the VHD footer to calculate total_sectors.
*/
- total_sectors = MIN(VHD_MAX_GEOMETRY, total_size / BDRV_SECTOR_SIZE);
- for (i = 0; total_sectors > (int64_t)cyls * heads * secs_per_cyl; i++) {
- calculate_geometry(total_sectors + i, &cyls, &heads, &secs_per_cyl);
+ if (force_size) {
+ /* This will force the use of total_size for sector count, below */
+ cyls = VHD_CHS_MAX_C;
+ heads = VHD_CHS_MAX_H;
+ secs_per_cyl = VHD_CHS_MAX_S;
+ } else {
+ total_sectors = MIN(VHD_MAX_GEOMETRY, total_size / BDRV_SECTOR_SIZE);
+ for (i = 0; total_sectors > (int64_t)cyls * heads * secs_per_cyl; i++) {
+ calculate_geometry(total_sectors + i, &cyls, &heads, &secs_per_cyl);
+ }
}
if ((int64_t)cyls * heads * secs_per_cyl == VHD_MAX_GEOMETRY) {
total_sectors = total_size / BDRV_SECTOR_SIZE;
- /* Allow a maximum disk size of approximately 2 TB */
+ /* Allow a maximum disk size of 2040 GiB */
if (total_sectors > VHD_MAX_SECTORS) {
+ error_setg(errp, "Disk size is too large, max size is 2040 GiB");
ret = -EFBIG;
goto out;
}
memset(buf, 0, 1024);
memcpy(footer->creator, "conectix", 8);
- /* TODO Check if "qemu" creator_app is ok for VPC */
- memcpy(footer->creator_app, "qemu", 4);
+ if (force_size) {
+ memcpy(footer->creator_app, "qem2", 4);
+ } else {
+ memcpy(footer->creator_app, "qemu", 4);
+ }
memcpy(footer->creator_os, "Wi2k", 4);
footer->features = cpu_to_be32(0x02);
footer->checksum = cpu_to_be32(vpc_checksum(buf, HEADER_SIZE));
if (disk_type == VHD_DYNAMIC) {
- ret = create_dynamic_disk(bs, buf, total_sectors);
+ ret = create_dynamic_disk(blk, buf, total_sectors);
} else {
- ret = create_fixed_disk(bs, buf, total_size);
+ ret = create_fixed_disk(blk, buf, total_size);
+ }
+ if (ret < 0) {
+ error_setg(errp, "Unable to create or write VHD header");
}
out:
- bdrv_unref(bs);
+ blk_unref(blk);
g_free(disk_type_param);
return ret;
}
VHDFooter *footer = (VHDFooter *) s->footer_buf;
if (be32_to_cpu(footer->type) == VHD_FIXED) {
- return bdrv_has_zero_init(bs->file);
+ return bdrv_has_zero_init(bs->file->bs);
} else {
return 1;
}
"Type of virtual hard disk format. Supported formats are "
"{dynamic (default) | fixed} "
},
+ {
+ .name = VPC_OPT_FORCE_SIZE,
+ .type = QEMU_OPT_BOOL,
+ .help = "Force disk size calculation to use the actual size "
+ "specified, rather than using the nearest CHS-based "
+ "calculation"
+ },
{ /* end of list */ }
}
};
Code Review / kvmfornfv.git / blobdiff