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 13 #define UNIX_HASH_SIZE 256 14 15 extern unsigned int unix_tot_inflight; 16 17 struct unix_address { 18 atomic_t refcnt; 19 int len; 20 unsigned hash; 21 struct sockaddr_un name[0]; 22 }; 23 24 struct unix_skb_parms { 25 struct ucred creds; /* Skb credentials */ 26 struct scm_fp_list *fp; /* Passed files */ 27 #ifdef CONFIG_SECURITY_NETWORK 28 u32 secid; /* Security ID */ 29 #endif 30 }; 31 32 #define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb)) 33 #define UNIXCREDS(skb) (&UNIXCB((skb)).creds) 34 #define UNIXSID(skb) (&UNIXCB((skb)).secid) 35 36 #define unix_state_lock(s) spin_lock(&unix_sk(s)->lock) 37 #define unix_state_unlock(s) spin_unlock(&unix_sk(s)->lock) 38 #define unix_state_lock_nested(s) \ 39 spin_lock_nested(&unix_sk(s)->lock, \ 40 SINGLE_DEPTH_NESTING) 41 42 #ifdef __KERNEL__ 43 /* The AF_UNIX socket */ 44 struct unix_sock { 45 /* WARNING: sk has to be the first member */ 46 struct sock sk; 47 struct unix_address *addr; 48 struct dentry *dentry; 49 struct vfsmount *mnt; 50 struct mutex readlock; 51 struct sock *peer; 52 struct sock *other; 53 struct list_head link; 54 atomic_long_t inflight; 55 spinlock_t lock; 56 unsigned int gc_candidate : 1; 57 wait_queue_head_t peer_wait; 58 }; 59 #define unix_sk(__sk) ((struct unix_sock *)__sk) 60 61 #ifdef CONFIG_SYSCTL 62 extern int unix_sysctl_register(struct net *net); 63 extern void unix_sysctl_unregister(struct net *net); 64 #else 65 static inline int unix_sysctl_register(struct net *net) { return 0; } 66 static inline void unix_sysctl_unregister(struct net *net) {} 67 #endif 68 #endif 69 #endif 70