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block API change

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2088 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2006-08-05 21:32:10 +00:00
parent e70332b376
commit c47c33b098
1 changed files with 15 additions and 16 deletions
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31
block-qcow.c
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@ -350,7 +350,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
(n_end - n_start) < s->cluster_sectors) {
uint64_t start_sect;
start_sect = (offset & ~(s->cluster_size - 1)) >> 9;
memset(s->cluster_data + 512, 0xaa, 512);
memset(s->cluster_data + 512, 0x00, 512);
for(i = 0; i < s->cluster_sectors; i++) {
if (i < n_start || i >= n_end) {
encrypt_sectors(s, start_sect + i,
@ -813,7 +813,7 @@ static int qcow_create(const char *filename, int64_t total_size,
return 0;
}
int qcow_make_empty(BlockDriverState *bs)
static int qcow_make_empty(BlockDriverState *bs)
{
BDRVQcowState *s = bs->opaque;
uint32_t l1_length = s->l1_size * sizeof(uint64_t);
@ -833,18 +833,10 @@ int qcow_make_empty(BlockDriverState *bs)
return 0;
}
int qcow_get_cluster_size(BlockDriverState *bs)
{
BDRVQcowState *s = bs->opaque;
if (bs->drv != &bdrv_qcow)
return -1;
return s->cluster_size;
}
/* XXX: put compressed sectors first, then all the cluster aligned
tables to avoid losing bytes in alignment */
int qcow_compress_cluster(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf)
static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
BDRVQcowState *s = bs->opaque;
z_stream strm;
@ -852,8 +844,8 @@ int qcow_compress_cluster(BlockDriverState *bs, int64_t sector_num,
uint8_t *out_buf;
uint64_t cluster_offset;
if (bs->drv != &bdrv_qcow)
return -1;
if (nb_sectors != s->cluster_sectors)
return -EINVAL;
out_buf = qemu_malloc(s->cluster_size + (s->cluster_size / 1000) + 128);
if (!out_buf)
@ -907,6 +899,13 @@ static void qcow_flush(BlockDriverState *bs)
bdrv_flush(s->hd);
}
static int qcow_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVQcowState *s = bs->opaque;
bdi->cluster_size = s->cluster_size;
return 0;
}
BlockDriver bdrv_qcow = {
"qcow",
sizeof(BDRVQcowState),
@ -926,6 +925,6 @@ BlockDriver bdrv_qcow = {
.bdrv_aio_write = qcow_aio_write,
.bdrv_aio_cancel = qcow_aio_cancel,
.bdrv_aio_delete = qcow_aio_delete,
.bdrv_write_compressed = qcow_write_compressed,
.bdrv_get_info = qcow_get_info,
};