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[PATCH 1/3] quorum: Require WRITE perm with rewrite-corrupted
From: |
Max Reitz |
Subject: |
[PATCH 1/3] quorum: Require WRITE perm with rewrite-corrupted |
Date: |
Fri, 13 Nov 2020 22:17:16 +0100 |
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>
---
block/quorum.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/block/quorum.c b/block/quorum.c
index b70d365ba9..01e49e94a3 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -1195,7 +1195,12 @@ 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
--
2.28.0