diff options
author | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-04-05 21:07:26 +0000 |
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committer | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-04-05 21:07:26 +0000 |
commit | 8d47bb6162148e601a5700c08d5feaeec5047026 (patch) | |
tree | b07e0e985b8263beda4813e4215b974d76189b81 /block.c | |
parent | 80acab6c50a591e1c0aaa43d14f4c3ae4f9f23b2 (diff) |
Fix savevm after BDRV_FILE size enforcement
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/branches/stable_0_10@7005 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'block.c')
-rw-r--r-- | block.c | 20 |
1 files changed, 20 insertions, 0 deletions
@@ -1181,6 +1181,26 @@ 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 */ |