[mirror_ubuntu-artful-kernel.git] / include / linux / net.h

/*
 * NET		An implementation of the SOCKET network access protocol.
 *		This is the master header file for the Linux NET layer,
 *		or, in plain English: the networking handling part of the
 *		kernel.
 *
 * Version:	@(#)net.h	1.0.3	05/25/93
 *
 * Authors:	Orest Zborowski, <obz@Kodak.COM>
 *		Ross Biro
 *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 */
#ifndef _LINUX_NET_H
#define _LINUX_NET_H

#include <linux/stringify.h>
#include <linux/random.h>
#include <linux/wait.h>
#include <linux/fcntl.h>	/* For O_CLOEXEC and O_NONBLOCK */
#include <linux/kmemcheck.h>
#include <linux/rcupdate.h>
#include <linux/once.h>
#include <linux/fs.h>

#include <uapi/linux/net.h>

struct poll_table_struct;
struct pipe_inode_info;
struct inode;
struct file;
struct net;

/* Historically, SOCKWQ_ASYNC_NOSPACE & SOCKWQ_ASYNC_WAITDATA were located
 * in sock->flags, but moved into sk->sk_wq->flags to be RCU protected.
 * Eventually all flags will be in sk->sk_wq_flags.
 */
#define SOCKWQ_ASYNC_NOSPACE	0
#define SOCKWQ_ASYNC_WAITDATA	1
#define SOCK_NOSPACE		2
#define SOCK_PASSCRED		3
#define SOCK_PASSSEC		4

#ifndef ARCH_HAS_SOCKET_TYPES
/**
 * enum sock_type - Socket types
 * @SOCK_STREAM: stream (connection) socket
 * @SOCK_DGRAM: datagram (conn.less) socket
 * @SOCK_RAW: raw socket
 * @SOCK_RDM: reliably-delivered message
 * @SOCK_SEQPACKET: sequential packet socket
 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
 *		  For writing rarp and other similar things on the user level.
 *
 * When adding some new socket type please
 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
 * overrides this enum for binary compat reasons.
 */
enum sock_type {
	SOCK_STREAM	= 1,
	SOCK_DGRAM	= 2,
	SOCK_RAW	= 3,
	SOCK_RDM	= 4,
	SOCK_SEQPACKET	= 5,
	SOCK_DCCP	= 6,
	SOCK_PACKET	= 10,
};

#define SOCK_MAX (SOCK_PACKET + 1)
/* Mask which covers at least up to SOCK_MASK-1.  The
 * remaining bits are used as flags. */
#define SOCK_TYPE_MASK 0xf

/* Flags for socket, socketpair, accept4 */
#define SOCK_CLOEXEC	O_CLOEXEC
#ifndef SOCK_NONBLOCK
#define SOCK_NONBLOCK	O_NONBLOCK
#endif

#endif /* ARCH_HAS_SOCKET_TYPES */

enum sock_shutdown_cmd {
	SHUT_RD,
	SHUT_WR,
	SHUT_RDWR,
};

struct socket_wq {
	/* Note: wait MUST be first field of socket_wq */
	wait_queue_head_t	wait;
	struct fasync_struct	*fasync_list;
	unsigned long		flags; /* %SOCKWQ_ASYNC_NOSPACE, etc */
	struct rcu_head		rcu;
} ____cacheline_aligned_in_smp;

/**
 *  struct socket - general BSD socket
 *  @state: socket state (%SS_CONNECTED, etc)
 *  @type: socket type (%SOCK_STREAM, etc)
 *  @flags: socket flags (%SOCK_NOSPACE, etc)
 *  @ops: protocol specific socket operations
 *  @file: File back pointer for gc
 *  @sk: internal networking protocol agnostic socket representation
 *  @wq: wait queue for several uses
 */
struct socket {
	socket_state		state;

	kmemcheck_bitfield_begin(type);
	short			type;
	kmemcheck_bitfield_end(type);

	unsigned long		flags;

	struct socket_wq __rcu	*wq;

	struct file		*file;
	struct sock		*sk;
	const struct proto_ops	*ops;
};

struct vm_area_struct;
struct page;
struct sockaddr;
struct msghdr;
struct module;
struct sk_buff;
typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
			       unsigned int, size_t);

struct proto_ops {
	int		family;
	struct module	*owner;
	int		(*release)   (struct socket *sock);
	int		(*bind)	     (struct socket *sock,
				      struct sockaddr *myaddr,
				      int sockaddr_len);
	int		(*connect)   (struct socket *sock,
				      struct sockaddr *vaddr,
				      int sockaddr_len, int flags);
	int		(*socketpair)(struct socket *sock1,
				      struct socket *sock2);
	int		(*accept)    (struct socket *sock,
				      struct socket *newsock, int flags, bool kern);
	int		(*getname)   (struct socket *sock,
				      struct sockaddr *addr,
				      int *sockaddr_len, int peer);
	unsigned int	(*poll)	     (struct file *file, struct socket *sock,
				      struct poll_table_struct *wait);
	int		(*ioctl)     (struct socket *sock, unsigned int cmd,
				      unsigned long arg);
#ifdef CONFIG_COMPAT
	int	 	(*compat_ioctl) (struct socket *sock, unsigned int cmd,
				      unsigned long arg);
#endif
	int		(*listen)    (struct socket *sock, int len);
	int		(*shutdown)  (struct socket *sock, int flags);
	int		(*setsockopt)(struct socket *sock, int level,
				      int optname, char __user *optval, unsigned int optlen);
	int		(*getsockopt)(struct socket *sock, int level,
				      int optname, char __user *optval, int __user *optlen);
#ifdef CONFIG_COMPAT
	int		(*compat_setsockopt)(struct socket *sock, int level,
				      int optname, char __user *optval, unsigned int optlen);
	int		(*compat_getsockopt)(struct socket *sock, int level,
				      int optname, char __user *optval, int __user *optlen);
#endif
	int		(*sendmsg)   (struct socket *sock, struct msghdr *m,
				      size_t total_len);
	/* Notes for implementing recvmsg:
	 * ===============================
	 * msg->msg_namelen should get updated by the recvmsg handlers
	 * iff msg_name != NULL. It is by default 0 to prevent
	 * returning uninitialized memory to user space.  The recvfrom
	 * handlers can assume that msg.msg_name is either NULL or has
	 * a minimum size of sizeof(struct sockaddr_storage).
	 */
	int		(*recvmsg)   (struct socket *sock, struct msghdr *m,
				      size_t total_len, int flags);
	int		(*mmap)	     (struct file *file, struct socket *sock,
				      struct vm_area_struct * vma);
	ssize_t		(*sendpage)  (struct socket *sock, struct page *page,
				      int offset, size_t size, int flags);
	ssize_t 	(*splice_read)(struct socket *sock,  loff_t *ppos,
				       struct pipe_inode_info *pipe, size_t len, unsigned int flags);
	int		(*set_peek_off)(struct sock *sk, int val);
	int		(*peek_len)(struct socket *sock);
	int		(*read_sock)(struct sock *sk, read_descriptor_t *desc,
				     sk_read_actor_t recv_actor);
};

#define DECLARE_SOCKADDR(type, dst, src)	\
	type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })

struct net_proto_family {
	int		family;
	int		(*create)(struct net *net, struct socket *sock,
				  int protocol, int kern);
	struct module	*owner;
};

struct iovec;
struct kvec;

enum {
	SOCK_WAKE_IO,
	SOCK_WAKE_WAITD,
	SOCK_WAKE_SPACE,
	SOCK_WAKE_URG,
};

int sock_wake_async(struct socket_wq *sk_wq, int how, int band);
int sock_register(const struct net_proto_family *fam);
void sock_unregister(int family);
int __sock_create(struct net *net, int family, int type, int proto,
		  struct socket **res, int kern);
int sock_create(int family, int type, int proto, struct socket **res);
int sock_create_kern(struct net *net, int family, int type, int proto, struct socket **res);
int sock_create_lite(int family, int type, int proto, struct socket **res);
struct socket *sock_alloc(void);
void sock_release(struct socket *sock);
int sock_sendmsg(struct socket *sock, struct msghdr *msg);
int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags);
struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname);
struct socket *sockfd_lookup(int fd, int *err);
struct socket *sock_from_file(struct file *file, int *err);
#define		     sockfd_put(sock) fput(sock->file)
int net_ratelimit(void);

#define net_ratelimited_function(function, ...)			\
do {								\
	if (net_ratelimit())					\
		function(__VA_ARGS__);				\
} while (0)

#define net_emerg_ratelimited(fmt, ...)				\
	net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__)
#define net_alert_ratelimited(fmt, ...)				\
	net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__)
#define net_crit_ratelimited(fmt, ...)				\
	net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__)
#define net_err_ratelimited(fmt, ...)				\
	net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__)
#define net_notice_ratelimited(fmt, ...)			\
	net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__)
#define net_warn_ratelimited(fmt, ...)				\
	net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__)
#define net_info_ratelimited(fmt, ...)				\
	net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
#if defined(CONFIG_DYNAMIC_DEBUG)
#define net_dbg_ratelimited(fmt, ...)					\
do {									\
	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);			\
	if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) &&	\
	    net_ratelimit())						\
		__dynamic_pr_debug(&descriptor, pr_fmt(fmt),		\
		                   ##__VA_ARGS__);			\
} while (0)
#elif defined(DEBUG)
#define net_dbg_ratelimited(fmt, ...)				\
	net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__)
#else
#define net_dbg_ratelimited(fmt, ...)				\
	do {							\
		if (0)						\
			no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
	} while (0)
#endif

#define net_get_random_once(buf, nbytes)			\
	get_random_once((buf), (nbytes))

int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
		   size_t num, size_t len);
int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
		   size_t num, size_t len, int flags);

int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen);
int kernel_listen(struct socket *sock, int backlog);
int kernel_accept(struct socket *sock, struct socket **newsock, int flags);
int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
		   int flags);
int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
		       int *addrlen);
int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
		       int *addrlen);
int kernel_getsockopt(struct socket *sock, int level, int optname, char *optval,
		      int *optlen);
int kernel_setsockopt(struct socket *sock, int level, int optname, char *optval,
		      unsigned int optlen);
int kernel_sendpage(struct socket *sock, struct page *page, int offset,
		    size_t size, int flags);
int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);

#define MODULE_ALIAS_NETPROTO(proto) \
	MODULE_ALIAS("net-pf-" __stringify(proto))

#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))

#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
		     "-type-" __stringify(type))

#define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
		     name)
#endif	/* _LINUX_NET_H */
Commit	Line	Data
	1	/*
	2	* NET An implementation of the SOCKET network access protocol.
	3	* This is the master header file for the Linux NET layer,
	4	* or, in plain English: the networking handling part of the
	5	* kernel.
	6	*
	7	* Version: @(#)net.h 1.0.3 05/25/93
	8	*
	9	* Authors: Orest Zborowski, <obz@Kodak.COM>
	10	* Ross Biro
	11	* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
	12	*
	13	* This program is free software; you can redistribute it and/or
	14	* modify it under the terms of the GNU General Public License
	15	* as published by the Free Software Foundation; either version
	16	* 2 of the License, or (at your option) any later version.
	17	*/
	18	#ifndef _LINUX_NET_H
	19	#define _LINUX_NET_H
	20
	21	#include <linux/stringify.h>
	22	#include <linux/random.h>
	23	#include <linux/wait.h>
	24	#include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
	25	#include <linux/kmemcheck.h>
	26	#include <linux/rcupdate.h>
	27	#include <linux/once.h>
	28	#include <linux/fs.h>
	29
	30	#include <uapi/linux/net.h>
	31
	32	struct poll_table_struct;
	33	struct pipe_inode_info;
	34	struct inode;
	35	struct file;
	36	struct net;
	37
	38	/* Historically, SOCKWQ_ASYNC_NOSPACE & SOCKWQ_ASYNC_WAITDATA were located
	39	* in sock->flags, but moved into sk->sk_wq->flags to be RCU protected.
	40	* Eventually all flags will be in sk->sk_wq_flags.
	41	*/
	42	#define SOCKWQ_ASYNC_NOSPACE 0
	43	#define SOCKWQ_ASYNC_WAITDATA 1
	44	#define SOCK_NOSPACE 2
	45	#define SOCK_PASSCRED 3
	46	#define SOCK_PASSSEC 4
	47
	48	#ifndef ARCH_HAS_SOCKET_TYPES
	49	/**
	50	* enum sock_type - Socket types
	51	* @SOCK_STREAM: stream (connection) socket
	52	* @SOCK_DGRAM: datagram (conn.less) socket
	53	* @SOCK_RAW: raw socket
	54	* @SOCK_RDM: reliably-delivered message
	55	* @SOCK_SEQPACKET: sequential packet socket
	56	* @SOCK_DCCP: Datagram Congestion Control Protocol socket
	57	* @SOCK_PACKET: linux specific way of getting packets at the dev level.
	58	* For writing rarp and other similar things on the user level.
	59	*
	60	* When adding some new socket type please
	61	* grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
	62	* overrides this enum for binary compat reasons.
	63	*/
	64	enum sock_type {
	65	SOCK_STREAM = 1,
	66	SOCK_DGRAM = 2,
	67	SOCK_RAW = 3,
	68	SOCK_RDM = 4,
	69	SOCK_SEQPACKET = 5,
	70	SOCK_DCCP = 6,
	71	SOCK_PACKET = 10,
	72	};
	73
	74	#define SOCK_MAX (SOCK_PACKET + 1)
	75	/* Mask which covers at least up to SOCK_MASK-1. The
	76	* remaining bits are used as flags. */
	77	#define SOCK_TYPE_MASK 0xf
	78
	79	/* Flags for socket, socketpair, accept4 */
	80	#define SOCK_CLOEXEC O_CLOEXEC
	81	#ifndef SOCK_NONBLOCK
	82	#define SOCK_NONBLOCK O_NONBLOCK
	83	#endif
	84
	85	#endif /* ARCH_HAS_SOCKET_TYPES */
	86
	87	enum sock_shutdown_cmd {
	88	SHUT_RD,
	89	SHUT_WR,
	90	SHUT_RDWR,
	91	};
	92
	93	struct socket_wq {
	94	/* Note: wait MUST be first field of socket_wq */
	95	wait_queue_head_t wait;
	96	struct fasync_struct *fasync_list;
	97	unsigned long flags; /* %SOCKWQ_ASYNC_NOSPACE, etc */
	98	struct rcu_head rcu;
	99	} ____cacheline_aligned_in_smp;
	100
	101	/**
	102	* struct socket - general BSD socket
	103	* @state: socket state (%SS_CONNECTED, etc)
	104	* @type: socket type (%SOCK_STREAM, etc)
	105	* @flags: socket flags (%SOCK_NOSPACE, etc)
	106	* @ops: protocol specific socket operations
	107	* @file: File back pointer for gc
	108	* @sk: internal networking protocol agnostic socket representation
	109	* @wq: wait queue for several uses
	110	*/
	111	struct socket {
	112	socket_state state;
	113
	114	kmemcheck_bitfield_begin(type);
	115	short type;
	116	kmemcheck_bitfield_end(type);
	117
	118	unsigned long flags;
	119
	120	struct socket_wq __rcu *wq;
	121
	122	struct file *file;
	123	struct sock *sk;
	124	const struct proto_ops *ops;
	125	};
	126
	127	struct vm_area_struct;
	128	struct page;
	129	struct sockaddr;
	130	struct msghdr;
	131	struct module;
	132	struct sk_buff;
	133	typedef int (sk_read_actor_t)(read_descriptor_t , struct sk_buff *,
	134	unsigned int, size_t);
	135
	136	struct proto_ops {
	137	int family;
	138	struct module *owner;
	139	int (release) (struct socket sock);
	140	int (bind) (struct socket sock,
	141	struct sockaddr *myaddr,
	142	int sockaddr_len);
	143	int (connect) (struct socket sock,
	144	struct sockaddr *vaddr,
	145	int sockaddr_len, int flags);
	146	int (socketpair)(struct socket sock1,
	147	struct socket *sock2);
	148	int (accept) (struct socket sock,
	149	struct socket *newsock, int flags, bool kern);
	150	int (getname) (struct socket sock,
	151	struct sockaddr *addr,
	152	int *sockaddr_len, int peer);
	153	unsigned int (poll) (struct file file, struct socket *sock,
	154	struct poll_table_struct *wait);
	155	int (ioctl) (struct socket sock, unsigned int cmd,
	156	unsigned long arg);
	157	#ifdef CONFIG_COMPAT
	158	int (compat_ioctl) (struct socket sock, unsigned int cmd,
	159	unsigned long arg);
	160	#endif
	161	int (listen) (struct socket sock, int len);
	162	int (shutdown) (struct socket sock, int flags);
	163	int (setsockopt)(struct socket sock, int level,
	164	int optname, char __user *optval, unsigned int optlen);
	165	int (getsockopt)(struct socket sock, int level,
	166	int optname, char __user optval, int __user optlen);
	167	#ifdef CONFIG_COMPAT
	168	int (compat_setsockopt)(struct socket sock, int level,
	169	int optname, char __user *optval, unsigned int optlen);
	170	int (compat_getsockopt)(struct socket sock, int level,
	171	int optname, char __user optval, int __user optlen);
	172	#endif
	173	int (sendmsg) (struct socket sock, struct msghdr *m,
	174	size_t total_len);
	175	/* Notes for implementing recvmsg:
	176	* ===============================
	177	* msg->msg_namelen should get updated by the recvmsg handlers
	178	* iff msg_name != NULL. It is by default 0 to prevent
	179	* returning uninitialized memory to user space. The recvfrom
	180	* handlers can assume that msg.msg_name is either NULL or has
	181	* a minimum size of sizeof(struct sockaddr_storage).
	182	*/
	183	int (recvmsg) (struct socket sock, struct msghdr *m,
	184	size_t total_len, int flags);
	185	int (mmap) (struct file file, struct socket *sock,
	186	struct vm_area_struct * vma);
	187	ssize_t (sendpage) (struct socket sock, struct page *page,
	188	int offset, size_t size, int flags);
	189	ssize_t (splice_read)(struct socket sock, loff_t *ppos,
	190	struct pipe_inode_info *pipe, size_t len, unsigned int flags);
	191	int (set_peek_off)(struct sock sk, int val);
	192	int (peek_len)(struct socket sock);
	193	int (read_sock)(struct sock sk, read_descriptor_t *desc,
	194	sk_read_actor_t recv_actor);
	195	};
	196
	197	#define DECLARE_SOCKADDR(type, dst, src) \
	198	type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
	199
	200	struct net_proto_family {
	201	int family;
	202	int (create)(struct net net, struct socket *sock,
	203	int protocol, int kern);
	204	struct module *owner;
	205	};
	206
	207	struct iovec;
	208	struct kvec;
	209
	210	enum {
	211	SOCK_WAKE_IO,
	212	SOCK_WAKE_WAITD,
	213	SOCK_WAKE_SPACE,
	214	SOCK_WAKE_URG,
	215	};
	216
	217	int sock_wake_async(struct socket_wq *sk_wq, int how, int band);
	218	int sock_register(const struct net_proto_family *fam);
	219	void sock_unregister(int family);
	220	int __sock_create(struct net *net, int family, int type, int proto,
	221	struct socket **res, int kern);
	222	int sock_create(int family, int type, int proto, struct socket **res);
	223	int sock_create_kern(struct net net, int family, int type, int proto, struct socket *res);
	224	int sock_create_lite(int family, int type, int proto, struct socket **res);
	225	struct socket *sock_alloc(void);
	226	void sock_release(struct socket *sock);
	227	int sock_sendmsg(struct socket sock, struct msghdr msg);
	228	int sock_recvmsg(struct socket sock, struct msghdr msg, int flags);
	229	struct file sock_alloc_file(struct socket sock, int flags, const char *dname);
	230	struct socket sockfd_lookup(int fd, int err);
	231	struct socket sock_from_file(struct file file, int *err);
	232	#define sockfd_put(sock) fput(sock->file)
	233	int net_ratelimit(void);
	234
	235	#define net_ratelimited_function(function, ...) \
	236	do { \
	237	if (net_ratelimit()) \
	238	function(__VA_ARGS__); \
	239	} while (0)
	240
	241	#define net_emerg_ratelimited(fmt, ...) \
	242	net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__)
	243	#define net_alert_ratelimited(fmt, ...) \
	244	net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__)
	245	#define net_crit_ratelimited(fmt, ...) \
	246	net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__)
	247	#define net_err_ratelimited(fmt, ...) \
	248	net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__)
	249	#define net_notice_ratelimited(fmt, ...) \
	250	net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__)
	251	#define net_warn_ratelimited(fmt, ...) \
	252	net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__)
	253	#define net_info_ratelimited(fmt, ...) \
	254	net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
	255	#if defined(CONFIG_DYNAMIC_DEBUG)
	256	#define net_dbg_ratelimited(fmt, ...) \
	257	do { \
	258	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
	259	if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
	260	net_ratelimit()) \
	261	__dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
	262	##__VA_ARGS__); \
	263	} while (0)
	264	#elif defined(DEBUG)
	265	#define net_dbg_ratelimited(fmt, ...) \
	266	net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__)
	267	#else
	268	#define net_dbg_ratelimited(fmt, ...) \
	269	do { \
	270	if (0) \
	271	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
	272	} while (0)
	273	#endif
	274
	275	#define net_get_random_once(buf, nbytes) \
	276	get_random_once((buf), (nbytes))
	277
	278	int kernel_sendmsg(struct socket sock, struct msghdr msg, struct kvec *vec,
	279	size_t num, size_t len);
	280	int kernel_recvmsg(struct socket sock, struct msghdr msg, struct kvec *vec,
	281	size_t num, size_t len, int flags);
	282
	283	int kernel_bind(struct socket sock, struct sockaddr addr, int addrlen);
	284	int kernel_listen(struct socket *sock, int backlog);
	285	int kernel_accept(struct socket sock, struct socket *newsock, int flags);
	286	int kernel_connect(struct socket sock, struct sockaddr addr, int addrlen,
	287	int flags);
	288	int kernel_getsockname(struct socket sock, struct sockaddr addr,
	289	int *addrlen);
	290	int kernel_getpeername(struct socket sock, struct sockaddr addr,
	291	int *addrlen);
	292	int kernel_getsockopt(struct socket sock, int level, int optname, char optval,
	293	int *optlen);
	294	int kernel_setsockopt(struct socket sock, int level, int optname, char optval,
	295	unsigned int optlen);
	296	int kernel_sendpage(struct socket sock, struct page page, int offset,
	297	size_t size, int flags);
	298	int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
	299	int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);
	300
	301	#define MODULE_ALIAS_NETPROTO(proto) \
	302	MODULE_ALIAS("net-pf-" __stringify(proto))
	303
	304	#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
	305	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
	306
	307	#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
	308	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
	309	"-type-" __stringify(type))
	310
	311	#define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
	312	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
	313	name)
	314	#endif /* _LINUX_NET_H */