#include "qemu/osdep.h"
#include "qapi/error.h"
#include "block/block_int.h"
+#include "block/qdict.h"
#include "sysemu/block-backend.h"
#include "qemu/module.h"
#include "qemu/option.h"
#include "migration/blocker.h"
#include "qemu/bswap.h"
#include "qemu/uuid.h"
+#include "qapi/qmp/qdict.h"
+#include "qapi/qobject-input-visitor.h"
+#include "qapi/qapi-visit-block-core.h"
/**************************************************************/
}
};
+static QemuOptsList vpc_create_opts;
+
static uint32_t vpc_checksum(uint8_t* buf, size_t size)
{
uint32_t res = 0;
checksum = be32_to_cpu(footer->checksum);
footer->checksum = 0;
- if (vpc_checksum(s->footer_buf, HEADER_SIZE) != checksum)
- fprintf(stderr, "block-vpc: The header checksum of '%s' is "
- "incorrect.\n", bs->filename);
+ if (vpc_checksum(s->footer_buf, HEADER_SIZE) != checksum) {
+ error_setg(errp, "Incorrect header checksum");
+ ret = -EINVAL;
+ goto fail;
+ }
/* Write 'checksum' back to footer, or else will leave it with zero. */
footer->checksum = cpu_to_be32(checksum);
}
qemu_co_mutex_init(&s->lock);
+ qemu_opts_del(opts);
return 0;
fail:
+ qemu_opts_del(opts);
qemu_vfree(s->pagetable);
#ifdef CACHE
g_free(s->pageentry_u8);
return ret;
}
-static int64_t coroutine_fn vpc_co_get_block_status(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file)
+static int coroutine_fn vpc_co_block_status(BlockDriverState *bs,
+ bool want_zero,
+ int64_t offset, int64_t bytes,
+ int64_t *pnum, int64_t *map,
+ BlockDriverState **file)
{
BDRVVPCState *s = bs->opaque;
VHDFooter *footer = (VHDFooter*) s->footer_buf;
- int64_t start, offset;
+ int64_t image_offset;
bool allocated;
- int64_t ret;
- int n;
+ int ret;
+ int64_t n;
if (be32_to_cpu(footer->type) == VHD_FIXED) {
- *pnum = nb_sectors;
+ *pnum = bytes;
+ *map = offset;
*file = bs->file->bs;
- return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID |
- (sector_num << BDRV_SECTOR_BITS);
+ return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID;
}
qemu_co_mutex_lock(&s->lock);
- offset = get_image_offset(bs, sector_num << BDRV_SECTOR_BITS, false, NULL);
- start = offset;
- allocated = (offset != -1);
+ image_offset = get_image_offset(bs, offset, false, NULL);
+ allocated = (image_offset != -1);
*pnum = 0;
ret = 0;
do {
/* All sectors in a block are contiguous (without using the bitmap) */
- n = ROUND_UP(sector_num + 1, s->block_size / BDRV_SECTOR_SIZE)
- - sector_num;
- n = MIN(n, nb_sectors);
+ n = ROUND_UP(offset + 1, s->block_size) - offset;
+ n = MIN(n, bytes);
*pnum += n;
- sector_num += n;
- nb_sectors -= n;
+ offset += n;
+ bytes -= n;
/* *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;
- ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | start;
+ *map = image_offset;
+ ret = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
break;
}
- if (nb_sectors == 0) {
+ if (bytes == 0) {
break;
}
- offset = get_image_offset(bs, sector_num << BDRV_SECTOR_BITS, false,
- NULL);
- } while (offset == -1);
+ image_offset = get_image_offset(bs, offset, false, NULL);
+ } while (image_offset == -1);
qemu_co_mutex_unlock(&s->lock);
return ret;
return ret;
}
-static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
+static int calculate_rounded_image_size(BlockdevCreateOptionsVpc *vpc_opts,
+ uint16_t *out_cyls,
+ uint8_t *out_heads,
+ uint8_t *out_secs_per_cyl,
+ int64_t *out_total_sectors,
+ Error **errp)
{
- uint8_t buf[1024];
- VHDFooter *footer = (VHDFooter *) buf;
- char *disk_type_param;
- int i;
+ int64_t total_size = vpc_opts->size;
uint16_t cyls = 0;
uint8_t heads = 0;
uint8_t secs_per_cyl = 0;
int64_t total_sectors;
- int64_t total_size;
- int disk_type;
- int ret = -EIO;
- bool force_size;
- Error *local_err = NULL;
- BlockBackend *blk = NULL;
-
- /* Read out options */
- total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
- BDRV_SECTOR_SIZE);
- disk_type_param = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
- if (disk_type_param) {
- if (!strcmp(disk_type_param, "dynamic")) {
- disk_type = VHD_DYNAMIC;
- } 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;
- }
- } else {
- 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;
- }
-
- blk = blk_new_open(filename, NULL, NULL,
- BDRV_O_RDWR | BDRV_O_RESIZE | 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);
+ int i;
/*
* Calculate matching total_size and geometry. Increase the number of
* 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.
*/
- if (force_size) {
+ if (vpc_opts->force_size) {
/* This will force the use of total_size for sector count, below */
cyls = VHD_CHS_MAX_C;
heads = VHD_CHS_MAX_H;
/* 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;
+ return -EFBIG;
}
} else {
- total_sectors = (int64_t)cyls * heads * secs_per_cyl;
- total_size = total_sectors * BDRV_SECTOR_SIZE;
+ total_sectors = (int64_t) cyls * heads * secs_per_cyl;
+ }
+
+ *out_total_sectors = total_sectors;
+ if (out_cyls) {
+ *out_cyls = cyls;
+ *out_heads = heads;
+ *out_secs_per_cyl = secs_per_cyl;
+ }
+
+ return 0;
+}
+
+static int coroutine_fn vpc_co_create(BlockdevCreateOptions *opts,
+ Error **errp)
+{
+ BlockdevCreateOptionsVpc *vpc_opts;
+ BlockBackend *blk = NULL;
+ BlockDriverState *bs = NULL;
+
+ uint8_t buf[1024];
+ VHDFooter *footer = (VHDFooter *) buf;
+ uint16_t cyls = 0;
+ uint8_t heads = 0;
+ uint8_t secs_per_cyl = 0;
+ int64_t total_sectors;
+ int64_t total_size;
+ int disk_type;
+ int ret = -EIO;
+
+ assert(opts->driver == BLOCKDEV_DRIVER_VPC);
+ vpc_opts = &opts->u.vpc;
+
+ /* Validate options and set default values */
+ total_size = vpc_opts->size;
+
+ if (!vpc_opts->has_subformat) {
+ vpc_opts->subformat = BLOCKDEV_VPC_SUBFORMAT_DYNAMIC;
+ }
+ switch (vpc_opts->subformat) {
+ case BLOCKDEV_VPC_SUBFORMAT_DYNAMIC:
+ disk_type = VHD_DYNAMIC;
+ break;
+ case BLOCKDEV_VPC_SUBFORMAT_FIXED:
+ disk_type = VHD_FIXED;
+ break;
+ default:
+ g_assert_not_reached();
+ }
+
+ /* Create BlockBackend to write to the image */
+ bs = bdrv_open_blockdev_ref(vpc_opts->file, errp);
+ if (bs == NULL) {
+ return -EIO;
+ }
+
+ blk = blk_new(BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL);
+ ret = blk_insert_bs(blk, bs, errp);
+ if (ret < 0) {
+ goto out;
+ }
+ blk_set_allow_write_beyond_eof(blk, true);
+
+ /* Get geometry and check that it matches the image size*/
+ ret = calculate_rounded_image_size(vpc_opts, &cyls, &heads, &secs_per_cyl,
+ &total_sectors, errp);
+ if (ret < 0) {
+ goto out;
+ }
+
+ if (total_size != total_sectors * BDRV_SECTOR_SIZE) {
+ error_setg(errp, "The requested image size cannot be represented in "
+ "CHS geometry");
+ error_append_hint(errp, "Try size=%llu or force-size=on (the "
+ "latter makes the image incompatible with "
+ "Virtual PC)",
+ total_sectors * BDRV_SECTOR_SIZE);
+ ret = -EINVAL;
+ goto out;
}
/* Prepare the Hard Disk Footer */
memset(buf, 0, 1024);
memcpy(footer->creator, "conectix", 8);
- if (force_size) {
+ if (vpc_opts->force_size) {
memcpy(footer->creator_app, "qem2", 4);
} else {
memcpy(footer->creator_app, "qemu", 4);
out:
blk_unref(blk);
- g_free(disk_type_param);
+ bdrv_unref(bs);
return ret;
}
+static int coroutine_fn vpc_co_create_opts(const char *filename,
+ QemuOpts *opts, Error **errp)
+{
+ BlockdevCreateOptions *create_options = NULL;
+ QDict *qdict;
+ Visitor *v;
+ BlockDriverState *bs = NULL;
+ Error *local_err = NULL;
+ int ret;
+
+ static const QDictRenames opt_renames[] = {
+ { VPC_OPT_FORCE_SIZE, "force-size" },
+ { NULL, NULL },
+ };
+
+ /* Parse options and convert legacy syntax */
+ qdict = qemu_opts_to_qdict_filtered(opts, NULL, &vpc_create_opts, true);
+
+ if (!qdict_rename_keys(qdict, opt_renames, errp)) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ /* Create and open the file (protocol layer) */
+ ret = bdrv_create_file(filename, opts, &local_err);
+ if (ret < 0) {
+ error_propagate(errp, local_err);
+ goto fail;
+ }
+
+ bs = bdrv_open(filename, NULL, NULL,
+ BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp);
+ if (bs == NULL) {
+ ret = -EIO;
+ goto fail;
+ }
+
+ /* Now get the QAPI type BlockdevCreateOptions */
+ qdict_put_str(qdict, "driver", "vpc");
+ qdict_put_str(qdict, "file", bs->node_name);
+
+ v = qobject_input_visitor_new_flat_confused(qdict, errp);
+ if (!v) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err);
+ visit_free(v);
+
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ /* Silently round up size */
+ assert(create_options->driver == BLOCKDEV_DRIVER_VPC);
+ create_options->u.vpc.size =
+ ROUND_UP(create_options->u.vpc.size, BDRV_SECTOR_SIZE);
+
+ if (!create_options->u.vpc.force_size) {
+ int64_t total_sectors;
+ ret = calculate_rounded_image_size(&create_options->u.vpc, NULL, NULL,
+ NULL, &total_sectors, errp);
+ if (ret < 0) {
+ goto fail;
+ }
+
+ create_options->u.vpc.size = total_sectors * BDRV_SECTOR_SIZE;
+ }
+
+
+ /* Create the vpc image (format layer) */
+ ret = vpc_co_create(create_options, errp);
+
+fail:
+ qobject_unref(qdict);
+ bdrv_unref(bs);
+ qapi_free_BlockdevCreateOptions(create_options);
+ return ret;
+}
+
+
static int vpc_has_zero_init(BlockDriverState *bs)
{
BDRVVPCState *s = bs->opaque;
.bdrv_close = vpc_close,
.bdrv_reopen_prepare = vpc_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
- .bdrv_create = vpc_create,
+ .bdrv_co_create = vpc_co_create,
+ .bdrv_co_create_opts = vpc_co_create_opts,
.bdrv_co_preadv = vpc_co_preadv,
.bdrv_co_pwritev = vpc_co_pwritev,
- .bdrv_co_get_block_status = vpc_co_get_block_status,
+ .bdrv_co_block_status = vpc_co_block_status,
.bdrv_get_info = vpc_get_info,
projects / mirror_qemu.git / blobdiff