blob: b5f8988e42837b6d703783f6f94dd6b9e4b09cba [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __LINUX_NET_AFUNIX_H
2#define __LINUX_NET_AFUNIX_H
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03003
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03004#include <linux/socket.h>
5#include <linux/un.h>
Ingo Molnar57b47a52006-03-20 22:35:41 -08006#include <linux/mutex.h>
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03007#include <net/sock.h>
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009extern void unix_inflight(struct file *fp);
10extern void unix_notinflight(struct file *fp);
11extern void unix_gc(void);
dann frazier5f23b732008-11-26 15:32:27 -080012extern void wait_for_unix_gc(void);
Eric Dumazet25888e32010-11-25 04:11:39 +000013extern struct sock *unix_get_socket(struct file *filp);
Pavel Emelyanovfa7ff562011-12-15 02:44:03 +000014extern struct sock *unix_peer_get(struct sock *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16#define UNIX_HASH_SIZE 256
Eric Dumazet7123aaa2012-06-08 05:03:21 +000017#define UNIX_HASH_BITS 8
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
Pavel Emelyanov9305cfa2007-11-10 22:06:01 -080019extern unsigned int unix_tot_inflight;
Pavel Emelyanovfa7ff562011-12-15 02:44:03 +000020extern spinlock_t unix_table_lock;
Eric Dumazet7123aaa2012-06-08 05:03:21 +000021extern struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
Linus Torvalds1da177e2005-04-16 15:20:36 -070023struct unix_address {
24 atomic_t refcnt;
25 int len;
Eric Dumazet95c96172012-04-15 05:58:06 +000026 unsigned int hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 struct sockaddr_un name[0];
28};
29
30struct unix_skb_parms {
Eric W. Biederman7361c362010-06-13 03:34:33 +000031 struct pid *pid; /* Skb credentials */
32 const struct cred *cred;
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 struct scm_fp_list *fp; /* Passed files */
Catherine Zhang877ce7c2006-06-29 12:27:47 -070034#ifdef CONFIG_SECURITY_NETWORK
Catherine Zhangdc49c1f2006-08-02 14:12:06 -070035 u32 secid; /* Security ID */
Catherine Zhang877ce7c2006-06-29 12:27:47 -070036#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070037};
38
Eric Dumazet43815482010-04-29 11:01:49 +000039#define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb))
Catherine Zhangdc49c1f2006-08-02 14:12:06 -070040#define UNIXSID(skb) (&UNIXCB((skb)).secid)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
David S. Miller1c92b4e2007-05-31 13:24:26 -070042#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock)
43#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock)
44#define unix_state_lock_nested(s) \
Ingo Molnara09785a2006-07-03 00:25:12 -070045 spin_lock_nested(&unix_sk(s)->lock, \
46 SINGLE_DEPTH_NESTING)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Linus Torvalds1da177e2005-04-16 15:20:36 -070048/* The AF_UNIX socket */
49struct unix_sock {
50 /* WARNING: sk has to be the first member */
51 struct sock sk;
Eric Dumazet43815482010-04-29 11:01:49 +000052 struct unix_address *addr;
Al Viro40ffe672012-03-14 21:54:32 -040053 struct path path;
Ingo Molnar57b47a52006-03-20 22:35:41 -080054 struct mutex readlock;
Eric Dumazet43815482010-04-29 11:01:49 +000055 struct sock *peer;
56 struct sock *other;
Miklos Szeredi1fd05ba2007-07-11 14:22:39 -070057 struct list_head link;
Eric Dumazet43815482010-04-29 11:01:49 +000058 atomic_long_t inflight;
59 spinlock_t lock;
Miklos Szeredi1fd05ba2007-07-11 14:22:39 -070060 unsigned int gc_candidate : 1;
Miklos Szeredi62093442008-11-09 15:23:57 +010061 unsigned int gc_maybe_cycle : 1;
Eric Dumazet25888e32010-11-25 04:11:39 +000062 unsigned char recursion_level;
Eric Dumazet43815482010-04-29 11:01:49 +000063 struct socket_wq peer_wq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064};
65#define unix_sk(__sk) ((struct unix_sock *)__sk)
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030066
Eric Dumazet43815482010-04-29 11:01:49 +000067#define peer_wait peer_wq.wait
68
Pavel Emelyanov885ee742011-12-30 00:54:11 +000069long unix_inq_len(struct sock *sk);
70long unix_outq_len(struct sock *sk);
71
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030072#ifdef CONFIG_SYSCTL
Pavel Emelyanov97577e32007-12-01 23:40:40 +110073extern int unix_sysctl_register(struct net *net);
74extern void unix_sysctl_unregister(struct net *net);
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030075#else
Pavel Emelyanov97577e32007-12-01 23:40:40 +110076static inline int unix_sysctl_register(struct net *net) { return 0; }
77static inline void unix_sysctl_unregister(struct net *net) {}
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030078#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#endif