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quorum: Require WRITE perm with rewrite-corrupted

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Using rewrite-corrupted means quorum may issue writes to its children
just from receiving read requests from its parents.  Thus, it must take
the WRITE permission when rewrite-corrupted is used.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20201113211718.261671-2-mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz
2020-11-17 12:38:28 +01:00
committed by Kevin Wolf
parent bd89f93603
commit 9ca5b0e842
1 changed files with 5 additions and 0 deletions
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block/quorum.c
+5
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@@ -1163,7 +1163,12 @@ static void quorum_child_perm(BlockDriverState *bs, BdrvChild *c,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
BDRVQuorumState *s = bs->opaque;
*nperm = perm & DEFAULT_PERM_PASSTHROUGH;
if (s->rewrite_corrupted) {
*nperm |= BLK_PERM_WRITE;
}
/*
* We cannot share RESIZE or WRITE, as this would make the