#ifndef __LINUX_NET_AFUNIX_H #define __LINUX_NET_AFUNIX_H #include <linux/socket.h> #include <linux/un.h> #include <linux/mutex.h> #include <net/sock.h> extern void unix_inflight(struct file *fp); extern void unix_notinflight(struct file *fp); extern void unix_gc(void); #define UNIX_HASH_SIZE 256 extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1]; extern spinlock_t unix_table_lock; extern atomic_t unix_tot_inflight; static inline struct sock *first_unix_socket(int *i) { for (*i = 0; *i <= UNIX_HASH_SIZE; (*i)++) { if (!hlist_empty(&unix_socket_table[*i])) return __sk_head(&unix_socket_table[*i]); } return NULL; } static inline struct sock *next_unix_socket(int *i, struct sock *s) { struct sock *next = sk_next(s); /* More in this chain? */ if (next) return next; /* Look for next non-empty chain. */ for ((*i)++; *i <= UNIX_HASH_SIZE; (*i)++) { if (!hlist_empty(&unix_socket_table[*i])) return __sk_head(&unix_socket_table[*i]); } return NULL; } #define forall_unix_sockets(i, s) \ for (s = first_unix_socket(&(i)); s; s = next_unix_socket(&(i),(s))) struct unix_address { atomic_t refcnt; int len; unsigned hash; struct sockaddr_un name[0]; }; struct unix_skb_parms { struct ucred creds; /* Skb credentials */ struct scm_fp_list *fp; /* Passed files */ }; #define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb)) #define UNIXCREDS(skb) (&UNIXCB((skb)).creds) #define unix_state_rlock(s) spin_lock(&unix_sk(s)->lock) #define unix_state_runlock(s) spin_unlock(&unix_sk(s)->lock) #define unix_state_wlock(s) spin_lock(&unix_sk(s)->lock) #define unix_state_wunlock(s) spin_unlock(&unix_sk(s)->lock) #ifdef __KERNEL__ /* The AF_UNIX socket */ struct unix_sock { /* WARNING: sk has to be the first member */ struct sock sk; struct unix_address *addr; struct dentry *dentry; struct vfsmount *mnt; struct mutex readlock; struct sock *peer; struct sock *other; struct sock *gc_tree; atomic_t inflight; spinlock_t lock; wait_queue_head_t peer_wait; }; #define unix_sk(__sk) ((struct unix_sock *)__sk) #ifdef CONFIG_SYSCTL extern int sysctl_unix_max_dgram_qlen; extern void unix_sysctl_register(void); extern void unix_sysctl_unregister(void); #else static inline void unix_sysctl_register(void) {} static inline void unix_sysctl_unregister(void) {} #endif #endif #endif