[linux.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 <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
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>
57b47a53	7	#include <linux/mutex.h>
20380731 ACM	8	#include <net/sock.h>
20380731 ACM	9
1da177e4 LT	10	extern void unix_inflight(struct file *fp);
	11	extern void unix_notinflight(struct file *fp);
	12	extern void unix_gc(void);
	13
	14	#define UNIX_HASH_SIZE 256
	15
	16	extern struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
fbe9cc4a	17	extern spinlock_t unix_table_lock;
1da177e4 LT	18
	19	extern atomic_t unix_tot_inflight;
	20
	21	static inline struct sock first_unix_socket(int i)
	22	{
	23	for (i = 0; i <= UNIX_HASH_SIZE; (*i)++) {
	24	if (!hlist_empty(&unix_socket_table[*i]))
	25	return __sk_head(&unix_socket_table[*i]);
	26	}
	27	return NULL;
	28	}
	29
	30	static inline struct sock next_unix_socket(int i, struct sock *s)
	31	{
	32	struct sock *next = sk_next(s);
	33	/* More in this chain? */
	34	if (next)
	35	return next;
	36	/* Look for next non-empty chain. */
	37	for ((i)++; i <= UNIX_HASH_SIZE; (*i)++) {
	38	if (!hlist_empty(&unix_socket_table[*i]))
	39	return __sk_head(&unix_socket_table[*i]);
	40	}
	41	return NULL;
	42	}
	43
	44	#define forall_unix_sockets(i, s) \
	45	for (s = first_unix_socket(&(i)); s; s = next_unix_socket(&(i),(s)))
	46
	47	struct unix_address {
	48	atomic_t refcnt;
	49	int len;
	50	unsigned hash;
	51	struct sockaddr_un name[0];
	52	};
	53
	54	struct unix_skb_parms {
	55	struct ucred creds; /* Skb credentials */
	56	struct scm_fp_list fp; / Passed files */
	57	};
	58
	59	#define UNIXCB(skb) ((struct unix_skb_parms)&((skb)->cb))
	60	#define UNIXCREDS(skb) (&UNIXCB((skb)).creds)
	61
fd19f329 BL	62	#define unix_state_rlock(s) spin_lock(&unix_sk(s)->lock)
	63	#define unix_state_runlock(s) spin_unlock(&unix_sk(s)->lock)
	64	#define unix_state_wlock(s) spin_lock(&unix_sk(s)->lock)
	65	#define unix_state_wunlock(s) spin_unlock(&unix_sk(s)->lock)
1da177e4 LT	66
	67	#ifdef __KERNEL__
	68	/* The AF_UNIX socket */
	69	struct unix_sock {
	70	/* WARNING: sk has to be the first member */
	71	struct sock sk;
	72	struct unix_address *addr;
	73	struct dentry *dentry;
	74	struct vfsmount *mnt;
57b47a53	75	struct mutex readlock;
1da177e4 LT	76	struct sock *peer;
	77	struct sock *other;
	78	struct sock *gc_tree;
	79	atomic_t inflight;
fd19f329	80	spinlock_t lock;
1da177e4 LT	81	wait_queue_head_t peer_wait;
	82	};
	83	#define unix_sk(__sk) ((struct unix_sock *)__sk)
20380731 ACM	84
	85	#ifdef CONFIG_SYSCTL
	86	extern int sysctl_unix_max_dgram_qlen;
	87	extern void unix_sysctl_register(void);
	88	extern void unix_sysctl_unregister(void);
	89	#else
	90	static inline void unix_sysctl_register(void) {}
	91	static inline void unix_sysctl_unregister(void) {}
	92	#endif
1da177e4 LT	93	#endif
1da177e4 LT	94	#endif