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 9 extern void unix_inflight(struct file *fp); 10 extern void unix_notinflight(struct file *fp); 11 extern void unix_gc(void); 12 extern void wait_for_unix_gc(void); 13 extern struct sock *unix_get_socket(struct file *filp); 14 15 #define UNIX_HASH_SIZE 256 16 17 extern unsigned int unix_tot_inflight; 18 19 struct unix_address { 20 atomic_t refcnt; 21 int len; 22 unsigned hash; 23 struct sockaddr_un name[0]; 24 }; 25 26 struct 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 /* The AF_UNIX socket */ 45 struct unix_sock { 46 /* WARNING: sk has to be the first member */ 47 struct sock sk; 48 struct unix_address *addr; 49 struct dentry *dentry; 50 struct vfsmount *mnt; 51 struct mutex readlock; 52 struct sock *peer; 53 struct sock *other; 54 struct list_head link; 55 atomic_long_t inflight; 56 spinlock_t lock; 57 unsigned int gc_candidate : 1; 58 unsigned int gc_maybe_cycle : 1; 59 unsigned char recursion_level; 60 struct socket_wq peer_wq; 61 }; 62 #define unix_sk(__sk) ((struct unix_sock *)__sk) 63 64 #define peer_wait peer_wq.wait 65 66 #ifdef CONFIG_SYSCTL 67 extern int unix_sysctl_register(struct net *net); 68 extern void unix_sysctl_unregister(struct net *net); 69 #else 70 static inline int unix_sysctl_register(struct net *net) { return 0; } 71 static inline void unix_sysctl_unregister(struct net *net) {} 72 #endif 73 #endif 74