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vpc: Use BB functions in .bdrv_create() 

All users of the block layers are supposed to go through a BlockBackend.
The .bdrv_create() implementation is one such user, so this patch
converts it.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2016-03-08 15:57:05 +01:00
parent c4bea1690e
commit b8f45cdf78
1 changed files with 21 additions and 16 deletions
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37
block/vpc.c
View File

@ -25,6 +25,7 @@
#include "qemu/osdep.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)
@ -758,7 +759,7 @@ static int calculate_geometry(int64_t total_sectors, uint16_t* cyls,
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 =
@ -772,13 +773,13 @@ static int create_dynamic_disk(BlockDriverState *bs, uint8_t *buf,
block_size = 0x200000;
num_bat_entries = (total_sectors + block_size / 512) / (block_size / 512);
ret = bdrv_pwrite_sync(bs, offset, buf, HEADER_SIZE);
ret = blk_pwrite(blk, offset, buf, HEADER_SIZE);
if (ret) {
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;
}
@ -788,7 +789,7 @@ static int create_dynamic_disk(BlockDriverState *bs, uint8_t *buf,
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;
}
@ -815,7 +816,7 @@ static int create_dynamic_disk(BlockDriverState *bs, uint8_t *buf,
// 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;
}
@ -824,7 +825,7 @@ static int create_dynamic_disk(BlockDriverState *bs, uint8_t *buf,
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;
@ -832,12 +833,12 @@ static int create_fixed_disk(BlockDriverState *bs, uint8_t *buf,
/* 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;
}
@ -860,7 +861,7 @@ static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
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),
@ -886,14 +887,18 @@ static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
error_propagate(errp, local_err);
goto out;
}
ret = bdrv_open(&bs, filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
if (ret < 0) {
blk = blk_new_open("image", filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | 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
@ -965,13 +970,13 @@ static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
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);
}
out:
bdrv_unref(bs);
blk_unref(blk);
g_free(disk_type_param);
return ret;
}