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Fix savevm after BDRV_FILE size enforcement

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We now enforce that you cannot write beyond the end of a non-growable file.
qcow2 files are not growable but we rely on them being growable to do
savevm/loadvm.  Temporarily allow them to be growable by introducing a new
API specifically for savevm read/write operations.

Reported-by: malc
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6994 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-04-05 19:10:55 +00:00
parent 8185d2c9a2
commit 178e08a58f
5 changed files with 64 additions and 6 deletions
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20
block.c
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@ -1146,6 +1146,26 @@ int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
return drv->bdrv_get_info(bs, bdi);
}
int bdrv_put_buffer(BlockDriverState *bs, const uint8_t *buf, int64_t pos, int size)
{
BlockDriver *drv = bs->drv;
if (!drv)
return -ENOMEDIUM;
if (!drv->bdrv_put_buffer)
return -ENOTSUP;
return drv->bdrv_put_buffer(bs, buf, pos, size);
}
int bdrv_get_buffer(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size)
{
BlockDriver *drv = bs->drv;
if (!drv)
return -ENOMEDIUM;
if (!drv->bdrv_get_buffer)
return -ENOTSUP;
return drv->bdrv_get_buffer(bs, buf, pos, size);
}
/**************************************************************/
/* handling of snapshots */