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-rw-r--r--include/net/af_unix.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/include/net/af_unix.h b/include/net/af_unix.h
new file mode 100644
index 0000000000..49c4640027
--- /dev/null
+++ b/include/net/af_unix.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_NET_AFUNIX_H
+#define __LINUX_NET_AFUNIX_H
+
+#include <linux/socket.h>
+#include <linux/un.h>
+#include <linux/mutex.h>
+#include <linux/refcount.h>
+#include <net/sock.h>
+
+void unix_inflight(struct user_struct *user, struct file *fp);
+void unix_notinflight(struct user_struct *user, struct file *fp);
+void unix_destruct_scm(struct sk_buff *skb);
+void io_uring_destruct_scm(struct sk_buff *skb);
+void unix_gc(void);
+void wait_for_unix_gc(void);
+struct sock *unix_get_socket(struct file *filp);
+struct sock *unix_peer_get(struct sock *sk);
+
+#define UNIX_HASH_MOD (256 - 1)
+#define UNIX_HASH_SIZE (256 * 2)
+#define UNIX_HASH_BITS 8
+
+extern unsigned int unix_tot_inflight;
+
+struct unix_address {
+ refcount_t refcnt;
+ int len;
+ struct sockaddr_un name[];
+};
+
+struct unix_skb_parms {
+ struct pid *pid; /* Skb credentials */
+ kuid_t uid;
+ kgid_t gid;
+ struct scm_fp_list *fp; /* Passed files */
+#ifdef CONFIG_SECURITY_NETWORK
+ u32 secid; /* Security ID */
+#endif
+ u32 consumed;
+} __randomize_layout;
+
+struct scm_stat {
+ atomic_t nr_fds;
+};
+
+#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 */
+ struct sock sk;
+ struct unix_address *addr;
+ struct path path;
+ struct mutex iolock, bindlock;
+ struct sock *peer;
+ struct list_head link;
+ atomic_long_t inflight;
+ spinlock_t lock;
+ unsigned long gc_flags;
+#define UNIX_GC_CANDIDATE 0
+#define UNIX_GC_MAYBE_CYCLE 1
+ struct socket_wq peer_wq;
+ wait_queue_entry_t peer_wake;
+ struct scm_stat scm_stat;
+#if IS_ENABLED(CONFIG_AF_UNIX_OOB)
+ struct sk_buff *oob_skb;
+#endif
+};
+
+#define unix_sk(ptr) container_of_const(ptr, struct unix_sock, sk)
+#define unix_peer(sk) (unix_sk(sk)->peer)
+
+#define peer_wait peer_wq.wait
+
+long unix_inq_len(struct sock *sk);
+long unix_outq_len(struct sock *sk);
+
+int __unix_dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
+ int flags);
+int __unix_stream_recvmsg(struct sock *sk, struct msghdr *msg, size_t size,
+ int flags);
+#ifdef CONFIG_SYSCTL
+int unix_sysctl_register(struct net *net);
+void unix_sysctl_unregister(struct net *net);
+#else
+static inline int unix_sysctl_register(struct net *net) { return 0; }
+static inline void unix_sysctl_unregister(struct net *net) {}
+#endif
+
+#ifdef CONFIG_BPF_SYSCALL
+extern struct proto unix_dgram_proto;
+extern struct proto unix_stream_proto;
+
+int unix_dgram_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
+int unix_stream_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
+void __init unix_bpf_build_proto(void);
+#else
+static inline void __init unix_bpf_build_proto(void)
+{}
+#endif
+#endif