[mirror_ubuntu-bionic-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/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;

	short			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);

	/* The following functions are called internally by kernel with
	 * sock lock already held.
	 */
	int		(*read_sock)(struct sock *sk, read_descriptor_t *desc,
				     sk_read_actor_t recv_actor);
	int		(*sendpage_locked)(struct sock *sk, struct page *page,
					   int offset, size_t size, int flags);
	int		(*sendmsg_locked)(struct sock *sk, struct msghdr *msg,
					  size_t size);
};

#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))
#define net_get_random_once_wait(buf, nbytes)			\
	get_random_once_wait((buf), (nbytes))

int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
		   size_t num, size_t len);
int kernel_sendmsg_locked(struct sock *sk, 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_sendpage_locked(struct sock *sk, 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);

/* Routine returns the IP overhead imposed by a (caller-protected) socket. */
u32 kernel_sock_ip_overhead(struct sock *sk);

#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
1da177e4 LT	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>
02c30a84	10	* Ross Biro
1da177e4 LT	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
eacf17bd	21	#include <linux/stringify.h>
cb4db4c2	22	#include <linux/random.h>
5770a3fb DW	23	#include <linux/wait.h>
5770a3fb DW	24	#include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
43815482	25	#include <linux/rcupdate.h>
46234253	26	#include <linux/once.h>
0294b625	27	#include <linux/fs.h>
46234253	28
607ca46e	29	#include <uapi/linux/net.h>
5770a3fb DW	30
	31	struct poll_table_struct;
	32	struct pipe_inode_info;
	33	struct inode;
56b31d1c	34	struct file;
5770a3fb	35	struct net;
1da177e4	36
ceb5d58b ED	37	/* Historically, SOCKWQ_ASYNC_NOSPACE & SOCKWQ_ASYNC_WAITDATA were located
ceb5d58b ED	38	* in sock->flags, but moved into sk->sk_wq->flags to be RCU protected.
b3dc8f77	39	* Eventually all flags will be in sk->sk_wq->flags.
ceb5d58b	40	*/
9cd3e072 ED	41	#define SOCKWQ_ASYNC_NOSPACE 0
9cd3e072 ED	42	#define SOCKWQ_ASYNC_WAITDATA 1
1da177e4 LT	43	#define SOCK_NOSPACE 2
1da177e4 LT	44	#define SOCK_PASSCRED 3
877ce7c1	45	#define SOCK_PASSSEC 4
1da177e4 LT	46
1da177e4 LT	47	#ifndef ARCH_HAS_SOCKET_TYPES
4dc3b16b PP	48	/**
	49	* enum sock_type - Socket types
	50	* @SOCK_STREAM: stream (connection) socket
	51	* @SOCK_DGRAM: datagram (conn.less) socket
	52	* @SOCK_RAW: raw socket
	53	* @SOCK_RDM: reliably-delivered message
	54	* @SOCK_SEQPACKET: sequential packet socket
8f2709b5	55	* @SOCK_DCCP: Datagram Congestion Control Protocol socket
4dc3b16b PP	56	* @SOCK_PACKET: linux specific way of getting packets at the dev level.
	57	* For writing rarp and other similar things on the user level.
	58	*
1da177e4 LT	59	* When adding some new socket type please
	60	* grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
	61	* overrides this enum for binary compat reasons.
1da177e4 LT	62	*/
	63	enum sock_type {
	64	SOCK_STREAM = 1,
	65	SOCK_DGRAM = 2,
	66	SOCK_RAW = 3,
	67	SOCK_RDM = 4,
	68	SOCK_SEQPACKET = 5,
7c657876	69	SOCK_DCCP = 6,
1da177e4 LT	70	SOCK_PACKET = 10,
	71	};
	72
	73	#define SOCK_MAX (SOCK_PACKET + 1)
a677a039 UD	74	/* Mask which covers at least up to SOCK_MASK-1. The
	75	* remaining bits are used as flags. */
	76	#define SOCK_TYPE_MASK 0xf
	77
de11defe	78	/* Flags for socket, socketpair, accept4 */
a677a039	79	#define SOCK_CLOEXEC O_CLOEXEC
c019bbc6 UD	80	#ifndef SOCK_NONBLOCK
	81	#define SOCK_NONBLOCK O_NONBLOCK
	82	#endif
1da177e4 LT	83
	84	#endif /* ARCH_HAS_SOCKET_TYPES */
	85
91cf45f0	86	enum sock_shutdown_cmd {
0e9649c1 JS	87	SHUT_RD,
	88	SHUT_WR,
	89	SHUT_RDWR,
91cf45f0 TM	90	};
91cf45f0 TM	91
43815482	92	struct socket_wq {
eaefd110	93	/* Note: wait MUST be first field of socket_wq */
43815482 ED	94	wait_queue_head_t wait;
43815482 ED	95	struct fasync_struct *fasync_list;
ceb5d58b	96	unsigned long flags; /* %SOCKWQ_ASYNC_NOSPACE, etc */
43815482 ED	97	struct rcu_head rcu;
	98	} ____cacheline_aligned_in_smp;
	99
1da177e4 LT	100	/**
1da177e4 LT	101	* struct socket - general BSD socket
4dc3b16b	102	* @state: socket state (%SS_CONNECTED, etc)
2c693610	103	* @type: socket type (%SOCK_STREAM, etc)
9cd3e072	104	* @flags: socket flags (%SOCK_NOSPACE, etc)
4dc3b16b	105	* @ops: protocol specific socket operations
4dc3b16b PP	106	* @file: File back pointer for gc
4dc3b16b PP	107	* @sk: internal networking protocol agnostic socket representation
e2aec372	108	* @wq: wait queue for several uses
1da177e4 LT	109	*/
	110	struct socket {
	111	socket_state state;
29a020d3	112
2c693610	113	short type;
29a020d3	114
1da177e4	115	unsigned long flags;
43815482	116
eaefd110	117	struct socket_wq __rcu *wq;
8bdd663a	118
1da177e4 LT	119	struct file *file;
1da177e4 LT	120	struct sock *sk;
8bdd663a	121	const struct proto_ops *ops;
1da177e4 LT	122	};
	123
	124	struct vm_area_struct;
	125	struct page;
1da177e4 LT	126	struct sockaddr;
	127	struct msghdr;
	128	struct module;
0294b625 TH	129	struct sk_buff;
	130	typedef int (sk_read_actor_t)(read_descriptor_t , struct sk_buff *,
	131	unsigned int, size_t);
1da177e4 LT	132
	133	struct proto_ops {
	134	int family;
	135	struct module *owner;
	136	int (release) (struct socket sock);
	137	int (bind) (struct socket sock,
	138	struct sockaddr *myaddr,
	139	int sockaddr_len);
	140	int (connect) (struct socket sock,
	141	struct sockaddr *vaddr,
	142	int sockaddr_len, int flags);
	143	int (socketpair)(struct socket sock1,
	144	struct socket *sock2);
	145	int (accept) (struct socket sock,
cdfbabfb	146	struct socket *newsock, int flags, bool kern);
1da177e4 LT	147	int (getname) (struct socket sock,
	148	struct sockaddr *addr,
	149	int *sockaddr_len, int peer);
	150	unsigned int (poll) (struct file file, struct socket *sock,
	151	struct poll_table_struct *wait);
	152	int (ioctl) (struct socket sock, unsigned int cmd,
	153	unsigned long arg);
1621e094	154	#ifdef CONFIG_COMPAT
89bbfc95 SP	155	int (compat_ioctl) (struct socket sock, unsigned int cmd,
89bbfc95 SP	156	unsigned long arg);
1621e094	157	#endif
1da177e4 LT	158	int (listen) (struct socket sock, int len);
	159	int (shutdown) (struct socket sock, int flags);
	160	int (setsockopt)(struct socket sock, int level,
b7058842	161	int optname, char __user *optval, unsigned int optlen);
1da177e4 LT	162	int (getsockopt)(struct socket sock, int level,
1da177e4 LT	163	int optname, char __user optval, int __user optlen);
1621e094	164	#ifdef CONFIG_COMPAT
3fdadf7d	165	int (compat_setsockopt)(struct socket sock, int level,
b7058842	166	int optname, char __user *optval, unsigned int optlen);
3fdadf7d DM	167	int (compat_getsockopt)(struct socket sock, int level,
3fdadf7d DM	168	int optname, char __user optval, int __user optlen);
1621e094	169	#endif
1b784140 YX	170	int (sendmsg) (struct socket sock, struct msghdr *m,
1b784140 YX	171	size_t total_len);
f3d33426 HFS	172	/* Notes for implementing recvmsg:
	173	* ===============================
	174	* msg->msg_namelen should get updated by the recvmsg handlers
	175	* iff msg_name != NULL. It is by default 0 to prevent
	176	* returning uninitialized memory to user space. The recvfrom
	177	* handlers can assume that msg.msg_name is either NULL or has
	178	* a minimum size of sizeof(struct sockaddr_storage).
	179	*/
1b784140 YX	180	int (recvmsg) (struct socket sock, struct msghdr *m,
1b784140 YX	181	size_t total_len, int flags);
1da177e4 LT	182	int (mmap) (struct file file, struct socket *sock,
	183	struct vm_area_struct * vma);
	184	ssize_t (sendpage) (struct socket sock, struct page *page,
	185	int offset, size_t size, int flags);
9c55e01c JA	186	ssize_t (splice_read)(struct socket sock, loff_t *ppos,
9c55e01c JA	187	struct pipe_inode_info *pipe, size_t len, unsigned int flags);
12663bfc	188	int (set_peek_off)(struct sock sk, int val);
1576d986	189	int (peek_len)(struct socket sock);
306b13eb TH	190
	191	/* The following functions are called internally by kernel with
	192	* sock lock already held.
	193	*/
0294b625 TH	194	int (read_sock)(struct sock sk, read_descriptor_t *desc,
0294b625 TH	195	sk_read_actor_t recv_actor);
306b13eb TH	196	int (sendpage_locked)(struct sock sk, struct page *page,
	197	int offset, size_t size, int flags);
	198	int (sendmsg_locked)(struct sock sk, struct msghdr *msg,
	199	size_t size);
1da177e4 LT	200	};
1da177e4 LT	201
38bfd8f5 CG	202	#define DECLARE_SOCKADDR(type, dst, src) \
	203	type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
	204
1da177e4 LT	205	struct net_proto_family {
1da177e4 LT	206	int family;
3f378b68 EP	207	int (create)(struct net net, struct socket *sock,
3f378b68 EP	208	int protocol, int kern);
1da177e4 LT	209	struct module *owner;
	210	};
	211
	212	struct iovec;
	213	struct kvec;
	214
8d8ad9d7 PE	215	enum {
	216	SOCK_WAKE_IO,
	217	SOCK_WAKE_WAITD,
	218	SOCK_WAKE_SPACE,
	219	SOCK_WAKE_URG,
	220	};
	221
ceb5d58b	222	int sock_wake_async(struct socket_wq *sk_wq, int how, int band);
7965bd4d JP	223	int sock_register(const struct net_proto_family *fam);
	224	void sock_unregister(int family);
	225	int __sock_create(struct net *net, int family, int type, int proto,
	226	struct socket **res, int kern);
	227	int sock_create(int family, int type, int proto, struct socket **res);
eeb1bd5c	228	int sock_create_kern(struct net net, int family, int type, int proto, struct socket *res);
7965bd4d	229	int sock_create_lite(int family, int type, int proto, struct socket **res);
f4a00aac	230	struct socket *sock_alloc(void);
7965bd4d	231	void sock_release(struct socket *sock);
d8725c86	232	int sock_sendmsg(struct socket sock, struct msghdr msg);
2da62906	233	int sock_recvmsg(struct socket sock, struct msghdr msg, int flags);
7965bd4d JP	234	struct file sock_alloc_file(struct socket sock, int flags, const char *dname);
	235	struct socket sockfd_lookup(int fd, int err);
	236	struct socket sock_from_file(struct file file, int *err);
1da177e4	237	#define sockfd_put(sock) fput(sock->file)
7965bd4d	238	int net_ratelimit(void);
aaa248f6	239
3a3bfb61 JP	240	#define net_ratelimited_function(function, ...) \
	241	do { \
	242	if (net_ratelimit()) \
	243	function(__VA_ARGS__); \
	244	} while (0)
	245
	246	#define net_emerg_ratelimited(fmt, ...) \
	247	net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__)
	248	#define net_alert_ratelimited(fmt, ...) \
	249	net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__)
	250	#define net_crit_ratelimited(fmt, ...) \
	251	net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__)
	252	#define net_err_ratelimited(fmt, ...) \
	253	net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__)
	254	#define net_notice_ratelimited(fmt, ...) \
	255	net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__)
	256	#define net_warn_ratelimited(fmt, ...) \
	257	net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__)
	258	#define net_info_ratelimited(fmt, ...) \
	259	net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
2c94b537 TB	260	#if defined(CONFIG_DYNAMIC_DEBUG)
	261	#define net_dbg_ratelimited(fmt, ...) \
	262	do { \
	263	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
	264	if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
	265	net_ratelimit()) \
daddef76 JD	266	__dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
daddef76 JD	267	##__VA_ARGS__); \
2c94b537 TB	268	} while (0)
2c94b537 TB	269	#elif defined(DEBUG)
3a3bfb61 JP	270	#define net_dbg_ratelimited(fmt, ...) \
3a3bfb61 JP	271	net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__)
d92cff89 JD	272	#else
	273	#define net_dbg_ratelimited(fmt, ...) \
	274	do { \
	275	if (0) \
	276	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
	277	} while (0)
	278	#endif
3a3bfb61	279
46234253 HFS	280	#define net_get_random_once(buf, nbytes) \
46234253 HFS	281	get_random_once((buf), (nbytes))
da9ba564 JD	282	#define net_get_random_once_wait(buf, nbytes) \
da9ba564 JD	283	get_random_once_wait((buf), (nbytes))
a48e4292	284
7965bd4d JP	285	int kernel_sendmsg(struct socket sock, struct msghdr msg, struct kvec *vec,
7965bd4d JP	286	size_t num, size_t len);
306b13eb TH	287	int kernel_sendmsg_locked(struct sock sk, struct msghdr msg,
306b13eb TH	288	struct kvec *vec, size_t num, size_t len);
7965bd4d JP	289	int kernel_recvmsg(struct socket sock, struct msghdr msg, struct kvec *vec,
7965bd4d JP	290	size_t num, size_t len, int flags);
1da177e4	291
7965bd4d JP	292	int kernel_bind(struct socket sock, struct sockaddr addr, int addrlen);
	293	int kernel_listen(struct socket *sock, int backlog);
	294	int kernel_accept(struct socket sock, struct socket *newsock, int flags);
	295	int kernel_connect(struct socket sock, struct sockaddr addr, int addrlen,
	296	int flags);
	297	int kernel_getsockname(struct socket sock, struct sockaddr addr,
	298	int *addrlen);
	299	int kernel_getpeername(struct socket sock, struct sockaddr addr,
	300	int *addrlen);
	301	int kernel_getsockopt(struct socket sock, int level, int optname, char optval,
	302	int *optlen);
	303	int kernel_setsockopt(struct socket sock, int level, int optname, char optval,
	304	unsigned int optlen);
	305	int kernel_sendpage(struct socket sock, struct page page, int offset,
	306	size_t size, int flags);
306b13eb TH	307	int kernel_sendpage_locked(struct sock sk, struct page page, int offset,
306b13eb TH	308	size_t size, int flags);
7965bd4d JP	309	int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
7965bd4d JP	310	int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);
ac5a488e	311
57240d00	312	/* Routine returns the IP overhead imposed by a (caller-protected) socket. */
113c3075 P	313	u32 kernel_sock_ip_overhead(struct sock *sk);
113c3075 P	314
1da177e4 LT	315	#define MODULE_ALIAS_NETPROTO(proto) \
	316	MODULE_ALIAS("net-pf-" __stringify(proto))
	317
4fdb3bb7 HW	318	#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
	319	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
	320
305e1e96 JD	321	#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
	322	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
	323	"-type-" __stringify(type))
	324
2033e9bf NH	325	#define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
	326	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
	327	name)
1da177e4	328	#endif /* _LINUX_NET_H */