Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / include / net / af_unix.h
bloba5ba41b3b86730ead8efdf8c4f33584949a92b19
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_NET_AFUNIX_H
3 #define __LINUX_NET_AFUNIX_H
5 #include <linux/socket.h>
6 #include <linux/un.h>
7 #include <linux/mutex.h>
8 #include <linux/refcount.h>
9 #include <net/sock.h>
11 void unix_inflight(struct user_struct *user, struct file *fp);
12 void unix_notinflight(struct user_struct *user, struct file *fp);
13 void unix_gc(void);
14 void wait_for_unix_gc(void);
15 struct sock *unix_get_socket(struct file *filp);
16 struct sock *unix_peer_get(struct sock *);
18 #define UNIX_HASH_SIZE 256
19 #define UNIX_HASH_BITS 8
21 extern unsigned int unix_tot_inflight;
22 extern spinlock_t unix_table_lock;
23 extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
25 struct unix_address {
26 refcount_t refcnt;
27 int len;
28 unsigned int hash;
29 struct sockaddr_un name[0];
32 struct unix_skb_parms {
33 struct pid *pid; /* Skb credentials */
34 kuid_t uid;
35 kgid_t gid;
36 struct scm_fp_list *fp; /* Passed files */
37 #ifdef CONFIG_SECURITY_NETWORK
38 u32 secid; /* Security ID */
39 #endif
40 u32 consumed;
41 } __randomize_layout;
43 #define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
45 #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
46 #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
47 #define unix_state_lock_nested(s) \
48 spin_lock_nested(&unix_sk(s)->lock, \
49 SINGLE_DEPTH_NESTING)
51 /* The AF_UNIX socket */
52 struct unix_sock {
53 /* WARNING: sk has to be the first member */
54 struct sock sk;
55 struct unix_address *addr;
56 struct path path;
57 struct mutex iolock, bindlock;
58 struct sock *peer;
59 struct list_head link;
60 atomic_long_t inflight;
61 spinlock_t lock;
62 unsigned long gc_flags;
63 #define UNIX_GC_CANDIDATE 0
64 #define UNIX_GC_MAYBE_CYCLE 1
65 struct socket_wq peer_wq;
66 wait_queue_entry_t peer_wake;
69 static inline struct unix_sock *unix_sk(const struct sock *sk)
71 return (struct unix_sock *)sk;
74 #define peer_wait peer_wq.wait
76 long unix_inq_len(struct sock *sk);
77 long unix_outq_len(struct sock *sk);
79 #ifdef CONFIG_SYSCTL
80 int unix_sysctl_register(struct net *net);
81 void unix_sysctl_unregister(struct net *net);
82 #else
83 static inline int unix_sysctl_register(struct net *net) { return 0; }
84 static inline void unix_sysctl_unregister(struct net *net) {}
85 #endif
86 #endif