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block/parallels: keep BAT bitmap data in little endian in memory 

This will allow to use this data as buffer to BAT update directly
without any intermediate buffers.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Roman Kagan <rkagan@parallels.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Roman Kagan <rkagan@parallels.com>
Message-id: 1430207220-24458-17-git-send-email-den@openvz.org
CC: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Denis V. Lunev 2015-04-28 10:46:49 +03:00 committed by Stefan Hajnoczi
parent 555cc9d9fc
commit dd97cdc064
1 changed files with 5 additions and 12 deletions
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17
block/parallels.c
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@ -90,7 +90,6 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVParallelsState *s = bs->opaque;
int i;
ParallelsHeader ph;
int ret;
@ -143,10 +142,6 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
goto fail;
}
for (i = 0; i < s->bat_size; i++) {
le32_to_cpus(&s->bat_bitmap[i]);
}
s->has_truncate = bdrv_has_zero_init(bs->file) &&
bdrv_truncate(bs->file, bdrv_getlength(bs->file)) == 0;
@ -164,7 +159,7 @@ fail:
static int64_t bat2sect(BDRVParallelsState *s, uint32_t idx)
{
return (uint64_t)s->bat_bitmap[idx] * s->off_multiplier;
return (uint64_t)le32_to_cpu(s->bat_bitmap[idx]) * s->off_multiplier;
}
static int64_t seek_to_sector(BDRVParallelsState *s, int64_t sector_num)
@ -191,7 +186,7 @@ static int cluster_remainder(BDRVParallelsState *s, int64_t sector_num,
static int64_t allocate_cluster(BlockDriverState *bs, int64_t sector_num)
{
BDRVParallelsState *s = bs->opaque;
uint32_t idx, offset, tmp;
uint32_t idx, offset;
int64_t pos;
int ret;
@ -215,12 +210,10 @@ static int64_t allocate_cluster(BlockDriverState *bs, int64_t sector_num)
return ret;
}
s->bat_bitmap[idx] = pos / s->off_multiplier;
tmp = cpu_to_le32(s->bat_bitmap[idx]);
s->bat_bitmap[idx] = cpu_to_le32(pos / s->off_multiplier);
ret = bdrv_pwrite(bs->file,
sizeof(ParallelsHeader) + idx * sizeof(tmp), &tmp, sizeof(tmp));
sizeof(ParallelsHeader) + idx * sizeof(s->bat_bitmap[idx]),
s->bat_bitmap + idx, sizeof(s->bat_bitmap[idx]));
if (ret < 0) {
s->bat_bitmap[idx] = 0;
return ret;