[net-next-2.6.git] / include / net / af_unix.h

#ifndef __LINUX_NET_AFUNIX_H
#define __LINUX_NET_AFUNIX_H

#include <linux/config.h>
#include <linux/socket.h>
#include <linux/un.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 rwlock_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)	read_lock(&unix_sk(s)->lock)
#define unix_state_runlock(s)	read_unlock(&unix_sk(s)->lock)
#define unix_state_wlock(s)	write_lock(&unix_sk(s)->lock)
#define unix_state_wunlock(s)	write_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 semaphore        readsem;
        struct sock		*peer;
        struct sock		*other;
        struct sock		*gc_tree;
        atomic_t                inflight;
        rwlock_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
Commit	Line	Data
1da177e4 LT	1	#ifndef __LINUX_NET_AFUNIX_H
1da177e4 LT	2	#define __LINUX_NET_AFUNIX_H
20380731 ACM	3
	4	#include <linux/config.h>
	5	#include <linux/socket.h>
	6	#include <linux/un.h>
	7	#include <net/sock.h>
	8
1da177e4 LT	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 struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
	16	extern rwlock_t unix_table_lock;
	17
	18	extern atomic_t unix_tot_inflight;
	19
	20	static inline struct sock first_unix_socket(int i)
	21	{
	22	for (i = 0; i <= UNIX_HASH_SIZE; (*i)++) {
	23	if (!hlist_empty(&unix_socket_table[*i]))
	24	return __sk_head(&unix_socket_table[*i]);
	25	}
	26	return NULL;
	27	}
	28
	29	static inline struct sock next_unix_socket(int i, struct sock *s)
	30	{
	31	struct sock *next = sk_next(s);
	32	/* More in this chain? */
	33	if (next)
	34	return next;
	35	/* Look for next non-empty chain. */
	36	for ((i)++; i <= UNIX_HASH_SIZE; (*i)++) {
	37	if (!hlist_empty(&unix_socket_table[*i]))
	38	return __sk_head(&unix_socket_table[*i]);
	39	}
	40	return NULL;
	41	}
	42
	43	#define forall_unix_sockets(i, s) \
	44	for (s = first_unix_socket(&(i)); s; s = next_unix_socket(&(i),(s)))
	45
	46	struct unix_address {
	47	atomic_t refcnt;
	48	int len;
	49	unsigned hash;
	50	struct sockaddr_un name[0];
	51	};
	52
	53	struct unix_skb_parms {
	54	struct ucred creds; /* Skb credentials */
	55	struct scm_fp_list fp; / Passed files */
	56	};
	57
	58	#define UNIXCB(skb) ((struct unix_skb_parms)&((skb)->cb))
	59	#define UNIXCREDS(skb) (&UNIXCB((skb)).creds)
	60
	61	#define unix_state_rlock(s) read_lock(&unix_sk(s)->lock)
	62	#define unix_state_runlock(s) read_unlock(&unix_sk(s)->lock)
	63	#define unix_state_wlock(s) write_lock(&unix_sk(s)->lock)
	64	#define unix_state_wunlock(s) write_unlock(&unix_sk(s)->lock)
	65
	66	#ifdef __KERNEL__
	67	/* The AF_UNIX socket */
	68	struct unix_sock {
	69	/* WARNING: sk has to be the first member */
	70	struct sock sk;
	71	struct unix_address *addr;
	72	struct dentry *dentry;
73	struct vfsmount *mnt;
74	struct semaphore readsem;
75	struct sock *peer;
76	struct sock *other;
77	struct sock *gc_tree;
78	atomic_t inflight;
79	rwlock_t lock;
80	wait_queue_head_t peer_wait;
81	};
82	#define unix_sk(__sk) ((struct unix_sock *)__sk)
20380731 ACM	83
	84	#ifdef CONFIG_SYSCTL
	85	extern int sysctl_unix_max_dgram_qlen;
	86	extern void unix_sysctl_register(void);
	87	extern void unix_sysctl_unregister(void);
	88	#else
	89	static inline void unix_sysctl_register(void) {}
	90	static inline void unix_sysctl_unregister(void) {}
	91	#endif
1da177e4 LT	92	#endif
1da177e4 LT	93	#endif