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authorKirill Tkhai <ktkhai@virtuozzo.com>2018-02-13 12:26:44 +0300
committerDavid S. Miller <davem@davemloft.net>2018-02-13 10:36:05 -0500
commit447cd7a0d7d1e5b4486e99cce289654fec9951e3 (patch)
treef4fcd20f07114c51de077795088061e70704273b /include/net/net_namespace.h
parentbcab1ddd9b2b105390712a9c1605bdb20a7f9a03 (diff)
net: Allow pernet_operations to be executed in parallel
This adds new pernet_operations::async flag to indicate operations, which ->init(), ->exit() and ->exit_batch() methods are allowed to be executed in parallel with the methods of any other pernet_operations. When there are only asynchronous pernet_operations in the system, net_mutex won't be taken for a net construction and destruction. Also, remove BUG_ON(mutex_is_locked()) from net_assign_generic() without replacing with the equivalent net_sem check, as there is one more lockdep assert below. v3: Add comment near net_mutex. Suggested-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Acked-by: Andrei Vagin <avagin@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/net_namespace.h')
-rw-r--r--include/net/net_namespace.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index f306b2aa15a4..9158ec1ad06f 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -313,6 +313,12 @@ struct pernet_operations {
void (*exit_batch)(struct list_head *net_exit_list);
unsigned int *id;
size_t size;
+ /*
+ * Indicates above methods are allowed to be executed in parallel
+ * with methods of any other pernet_operations, i.e. they are not
+ * need synchronization via net_mutex.
+ */
+ bool async;
};
/*