1 files changed, 78 insertions, 0 deletions

diff --git a/include/net/af_unix.h b/include/net/af_unix.h
new file mode 100644
index 000000000000..b60b3846b9d1
--- /dev/null
+++ b/include/net/af_unix.h
@@ -0,0 +1,78 @@
+#ifndef __LINUX_NET_AFUNIX_H
+#define __LINUX_NET_AFUNIX_H
+extern void unix_inflight(struct file *fp);
+extern void unix_notinflight(struct file *fp);
+extern void unix_gc(void);
+
+#define UNIX_HASH_SIZE  256
+
+extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
+extern rwlock_t unix_table_lock;
+
+extern atomic_t unix_tot_inflight;
+
+static inline struct sock *first_unix_socket(int *i)
+{
+        for (*i = 0; *i <= UNIX_HASH_SIZE; (*i)++) {
+                if (!hlist_empty(&unix_socket_table[*i]))
+                        return __sk_head(&unix_socket_table[*i]);
+        }
+        return NULL;
+}
+
+static inline struct sock *next_unix_socket(int *i, struct sock *s)
+{
+        struct sock *next = sk_next(s);
+        /* More in this chain? */
+        if (next)
+                return next;
+        /* Look for next non-empty chain. */
+        for ((*i)++; *i <= UNIX_HASH_SIZE; (*i)++) {
+                if (!hlist_empty(&unix_socket_table[*i]))
+                        return __sk_head(&unix_socket_table[*i]);
+        }
+        return NULL;
+}
+
+#define forall_unix_sockets(i, s) \
+        for (s = first_unix_socket(&(i)); s; s = next_unix_socket(&(i),(s)))
+
+struct unix_address {
+        atomic_t        refcnt;
+        int             len;
+        unsigned        hash;
+        struct sockaddr_un name[0];
+};
+
+struct unix_skb_parms {
+        struct ucred            creds;          /* Skb credentials      */
+        struct scm_fp_list      *fp;            /* Passed files         */
+};
+
+#define UNIXCB(skb)     (*(struct unix_skb_parms*)&((skb)->cb))
+#define UNIXCREDS(skb)  (&UNIXCB((skb)).creds)
+
+#define unix_state_rlock(s)     read_lock(&unix_sk(s)->lock)
+#define unix_state_runlock(s)   read_unlock(&unix_sk(s)->lock)
+#define unix_state_wlock(s)     write_lock(&unix_sk(s)->lock)
+#define unix_state_wunlock(s)   write_unlock(&unix_sk(s)->lock)
+
+#ifdef __KERNEL__
+/* The AF_UNIX socket */
+struct unix_sock {
+        /* WARNING: sk has to be the first member */
+        struct sock             sk;
+        struct unix_address     *addr;
+        struct dentry           *dentry;
+        struct vfsmount         *mnt;
+        struct semaphore        readsem;
+        struct sock             *peer;
+        struct sock             *other;
+        struct sock             *gc_tree;
+        atomic_t                inflight;
+        rwlock_t                lock;
+        wait_queue_head_t       peer_wait;
+};
+#define unix_sk(__sk) ((struct unix_sock *)__sk)
+#endif
+#endif