1#ifndef __LINUX_NET_AFUNIX_H 2#define __LINUX_NET_AFUNIX_H 3 4#include <linux/socket.h> 5#include <linux/un.h> 6#include <linux/mutex.h> 7#include <net/sock.h> 8 9extern void unix_inflight(struct file *fp); 10extern void unix_notinflight(struct file *fp); 11extern void unix_gc(void); 12extern void wait_for_unix_gc(void); 13extern struct sock *unix_get_socket(struct file *filp); 14 15#define UNIX_HASH_SIZE 256 16 17extern unsigned int unix_tot_inflight; 18 19struct unix_address { 20 atomic_t refcnt; 21 int len; 22 unsigned hash; 23 struct sockaddr_un name[0]; 24}; 25 26struct unix_skb_parms { 27 struct pid *pid; /* Skb credentials */ 28 const struct cred *cred; 29 struct scm_fp_list *fp; /* Passed files */ 30#ifdef CONFIG_SECURITY_NETWORK 31 u32 secid; /* Security ID */ 32#endif 33}; 34 35#define UNIXCB(skb) (*(struct unix_skb_parms *)&((skb)->cb)) 36#define UNIXSID(skb) (&UNIXCB((skb)).secid) 37 38#define unix_state_lock(s) spin_lock(&unix_sk(s)->lock) 39#define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock) 40#define unix_state_lock_nested(s) \ 41 spin_lock_nested(&unix_sk(s)->lock, \ 42 SINGLE_DEPTH_NESTING) 43 44#ifdef __KERNEL__ 45/* The AF_UNIX socket */ 46struct unix_sock { 47 /* WARNING: sk has to be the first member */ 48 struct sock sk; 49 struct unix_address *addr; 50 struct dentry *dentry; 51 struct vfsmount *mnt; 52 struct mutex readlock; 53 struct sock *peer; 54 struct sock *other; 55 struct list_head link; 56 atomic_long_t inflight; 57 spinlock_t lock; 58 unsigned int gc_candidate : 1; 59 unsigned int gc_maybe_cycle : 1; 60 unsigned char recursion_level; 61 struct socket_wq peer_wq; 62}; 63#define unix_sk(__sk) ((struct unix_sock *)__sk) 64 65#define peer_wait peer_wq.wait 66 67#ifdef CONFIG_SYSCTL 68extern int unix_sysctl_register(struct net *net); 69extern void unix_sysctl_unregister(struct net *net); 70#else 71static inline int unix_sysctl_register(struct net *net) { return 0; } 72static inline void unix_sysctl_unregister(struct net *net) {} 73#endif 74#endif 75#endif 76