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block: Protect bs->parents with graph_lock

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Almost all functions that access the parent link already take the graph
lock now. Add locking to the remaining user in a test case and finally
annotate the struct field itself as protected by the graph lock.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20230929145157.45443-21-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-09-29 16:51:55 +02:00
parent 3574499a1e
commit b59b466071
2 changed files with 7 additions and 2 deletions
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4
include/block/block_int-common.h
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@ -1043,7 +1043,7 @@ struct BdrvChild {
bool quiesced_parent;
QLIST_ENTRY(BdrvChild) next;
QLIST_ENTRY(BdrvChild) next_parent;
QLIST_ENTRY(BdrvChild GRAPH_RDLOCK_PTR) next_parent;
};
/*
@ -1180,7 +1180,7 @@ struct BlockDriverState {
BdrvChild *backing;
BdrvChild *file;
QLIST_HEAD(, BdrvChild) parents;
QLIST_HEAD(, BdrvChild GRAPH_RDLOCK_PTR) parents;
QDict *options;
QDict *explicit_options;