1 #ifndef __LINUX_NET_AFUNIX_H 2 #define __LINUX_NET_AFUNIX_H 3 extern void unix_inflight(struct file *fp); 4 extern void unix_notinflight(struct file *fp); 5 extern void unix_gc(void); 6 7 #define UNIX_HASH_SIZE 256 8 9 extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1]; 10 extern rwlock_t unix_table_lock; 11 12 extern atomic_t unix_tot_inflight; 13 14 static inline struct sock *first_unix_socket(int *i) 15 { 16 for (*i = 0; *i <= UNIX_HASH_SIZE; (*i)++) { 17 if (!hlist_empty(&unix_socket_table[*i])) 18 return __sk_head(&unix_socket_table[*i]); 19 } 20 return NULL; 21 } 22 23 static inline struct sock *next_unix_socket(int *i, struct sock *s) 24 { 25 struct sock *next = sk_next(s); 26 /* More in this chain? */ 27 if (next) 28 return next; 29 /* Look for next non-empty chain. */ 30 for ((*i)++; *i <= UNIX_HASH_SIZE; (*i)++) { 31 if (!hlist_empty(&unix_socket_table[*i])) 32 return __sk_head(&unix_socket_table[*i]); 33 } 34 return NULL; 35 } 36 37 #define forall_unix_sockets(i, s) \ 38 for (s = first_unix_socket(&(i)); s; s = next_unix_socket(&(i),(s))) 39 40 struct unix_address { 41 atomic_t refcnt; 42 int len; 43 unsigned hash; 44 struct sockaddr_un name[0]; 45 }; 46 47 struct unix_skb_parms { 48 struct ucred creds; /* Skb credentials */ 49 struct scm_fp_list *fp; /* Passed files */ 50 }; 51 52 #define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb)) 53 #define UNIXCREDS(skb) (&UNIXCB((skb)).creds) 54 55 #define unix_state_rlock(s) read_lock(&unix_sk(s)->lock) 56 #define unix_state_runlock(s) read_unlock(&unix_sk(s)->lock) 57 #define unix_state_wlock(s) write_lock(&unix_sk(s)->lock) 58 #define unix_state_wunlock(s) write_unlock(&unix_sk(s)->lock) 59 60 #ifdef __KERNEL__ 61 /* The AF_UNIX socket */ 62 struct unix_sock { 63 /* WARNING: sk has to be the first member */ 64 struct sock sk; 65 struct unix_address *addr; 66 struct dentry *dentry; 67 struct vfsmount *mnt; 68 struct semaphore readsem; 69 struct sock *peer; 70 struct sock *other; 71 struct sock *gc_tree; 72 atomic_t inflight; 73 rwlock_t lock; 74 wait_queue_head_t peer_wait; 75 }; 76 #define unix_sk(__sk) ((struct unix_sock *)__sk) 77 #endif 78 #endif 79