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-rw-r--r--include/net/af_unix.h20
1 files changed, 14 insertions, 6 deletions
diff --git a/include/net/af_unix.h b/include/net/af_unix.h
index 55ca217c6..0920b669b 100644
--- a/include/net/af_unix.h
+++ b/include/net/af_unix.h
@@ -45,12 +45,6 @@ struct scm_stat {
#define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
-#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
-#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
-#define unix_state_lock_nested(s) \
- spin_lock_nested(&unix_sk(s)->lock, \
- SINGLE_DEPTH_NESTING)
-
/* The AF_UNIX socket */
struct unix_sock {
/* WARNING: sk has to be the first member */
@@ -79,6 +73,20 @@ static inline struct unix_sock *unix_sk(const struct sock *sk)
}
#define unix_peer(sk) (unix_sk(sk)->peer)
+#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
+#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
+enum unix_socket_lock_class {
+ U_LOCK_NORMAL,
+ U_LOCK_SECOND, /* for double locking, see unix_state_double_lock(). */
+ U_LOCK_DIAG, /* used while dumping icons, see sk_diag_dump_icons(). */
+};
+
+static inline void unix_state_lock_nested(struct sock *sk,
+ enum unix_socket_lock_class subclass)
+{
+ spin_lock_nested(&unix_sk(sk)->lock, subclass);
+}
+
#define peer_wait peer_wq.wait
long unix_inq_len(struct sock *sk);