| #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 |