[PULL 19/28] mirror: Require GRAPH_RDLOCK for accessing a node's parent list

Kevin Wolf posted 28 patches 1 year, 12 months ago
Maintainers: Kevin Wolf <kwolf@redhat.com>, Hanna Reitz <hreitz@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, Fam Zheng <fam@euphon.net>, John Snow <jsnow@redhat.com>, Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>, Eric Blake <eblake@redhat.com>, "Denis V. Lunev" <den@openvz.org>, Alberto Garcia <berto@igalia.com>, Stefan Weil <sw@weilnetz.de>, Jeff Cody <codyprime@gmail.com>, Paolo Bonzini <pbonzini@redhat.com>, "Alex Bennée" <alex.bennee@linaro.org>, Thomas Huth <thuth@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Juan Quintela <quintela@redhat.com>, Peter Xu <peterx@redhat.com>, Leonardo Bras <leobras@redhat.com>
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[PULL 19/28] mirror: Require GRAPH_RDLOCK for accessing a node's parent list
Posted by Kevin Wolf 1 year, 12 months ago
This adds GRAPH_RDLOCK annotations to declare that functions accessing
the parent list of a node need to hold a reader lock for the graph. As
it happens, they already do.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230504115750.54437-13-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/mirror.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/mirror.c b/block/mirror.c
index 80fa345071..b5c4ae31f3 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1416,7 +1416,7 @@ static MirrorOp *coroutine_fn active_write_prepare(MirrorBlockJob *s,
     return op;
 }
 
-static void coroutine_fn active_write_settle(MirrorOp *op)
+static void coroutine_fn GRAPH_RDLOCK active_write_settle(MirrorOp *op)
 {
     uint64_t start_chunk = op->offset / op->s->granularity;
     uint64_t end_chunk = DIV_ROUND_UP(op->offset + op->bytes,
-- 
2.40.1