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replication: Fix replication open fail 

replication_child_perm request write
permissions for all child which will lead bdrv_check_perm fail.
replication_child_perm() should request write
permissions only if it is writable itself.

Signed-off-by: Wang Guang <wang.guang55@zte.com.cn>
Signed-off-by: Wang Yong <wang.yong155@zte.com.cn>
Reviewed-by: Xie Changlong <xiechanglong@cmss.chinamobile.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Wang Guang 2017-10-25 14:51:23 +08:00 committed by Kevin Wolf
parent fec035a53f
commit 611e0653ad
1 changed files with 7 additions and 4 deletions
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11
block/replication.c
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@ -161,10 +161,13 @@ static void replication_child_perm(BlockDriverState *bs, BdrvChild *c,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
*nperm = *nshared = BLK_PERM_CONSISTENT_READ \
| BLK_PERM_WRITE \
| BLK_PERM_WRITE_UNCHANGED;
*nperm = BLK_PERM_CONSISTENT_READ;
if ((bs->open_flags & (BDRV_O_INACTIVE | BDRV_O_RDWR)) == BDRV_O_RDWR) {
*nperm |= BLK_PERM_WRITE;
}
*nshared = BLK_PERM_CONSISTENT_READ \
| BLK_PERM_WRITE \
| BLK_PERM_WRITE_UNCHANGED;
return;
}