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| author |   Kirill Tkhai <ktkhai@virtuozzo.com> | 2018-02-13 12:26:44 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-02-13 10:36:05 -0500 |
| commit | 447cd7a0d7d1e5b4486e99cce289654fec9951e3 (patch) | |
| tree | f4fcd20f07114c51de077795088061e70704273b /include/net/net_namespace.h | |
| parent | net: Move mutex_unlock() in cleanup_net() up (diff) | |
| download | linux-dev-447cd7a0d7d1e5b4486e99cce289654fec9951e3.tar.xz linux-dev-447cd7a0d7d1e5b4486e99cce289654fec9951e3.zip | |
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.h | 6 |
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; }; /* |