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rbd: shift byte count as a 64-bit value 

Otherwise, reads of more than 2GB fail.  Until commit
7bbca9e290, reads of 2^41
bytes succeeded at least theoretically.

In fact, pdiscard ought to receive a 64-bit integer as the
count for the same reason.

Reported by Coverity.

Fixes: 7bbca9e290
Cc: qemu-stable@nongnu.org
Cc: kwolf@redhat.com
Cc: eblake@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-10-10 21:58:58 +02:00
parent 3c0ed2a342
commit e948f663e9
1 changed files with 2 additions and 2 deletions
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4
block/rbd.c
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@ -733,7 +733,7 @@ static BlockAIOCB *qemu_rbd_aio_readv(BlockDriverState *bs,
void *opaque)
{
return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov,
nb_sectors << BDRV_SECTOR_BITS, cb, opaque,
(int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque,
RBD_AIO_READ);
}
@ -745,7 +745,7 @@ static BlockAIOCB *qemu_rbd_aio_writev(BlockDriverState *bs,
void *opaque)
{
return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov,
nb_sectors << BDRV_SECTOR_BITS, cb, opaque,
(int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque,
RBD_AIO_WRITE);
}