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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * NET An implementation of the SOCKET network access protocol.
4 * This is the master header file for the Linux NET layer,
5 * or, in plain English: the networking handling part of the
6 * kernel.
7 *
8 * Version: @(#)net.h 1.0.3 05/25/93
9 *
10 * Authors: Orest Zborowski, <obz@Kodak.COM>
11 * Ross Biro
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 */
14#ifndef _LINUX_NET_H
15#define _LINUX_NET_H
16
17#include <linux/stringify.h>
18#include <linux/random.h>
19#include <linux/wait.h>
20#include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
21#include <linux/rcupdate.h>
22#include <linux/once.h>
23#include <linux/fs.h>
24#include <linux/mm.h>
25#include <linux/sockptr.h>
26
27#include <uapi/linux/net.h>
28
29struct poll_table_struct;
30struct pipe_inode_info;
31struct inode;
32struct file;
33struct net;
34
35/* Historically, SOCKWQ_ASYNC_NOSPACE & SOCKWQ_ASYNC_WAITDATA were located
36 * in sock->flags, but moved into sk->sk_wq->flags to be RCU protected.
37 * Eventually all flags will be in sk->sk_wq->flags.
38 */
39#define SOCKWQ_ASYNC_NOSPACE 0
40#define SOCKWQ_ASYNC_WAITDATA 1
41#define SOCK_NOSPACE 2
42#define SOCK_PASSCRED 3
43#define SOCK_PASSSEC 4
44
45#ifndef ARCH_HAS_SOCKET_TYPES
46/**
47 * enum sock_type - Socket types
48 * @SOCK_STREAM: stream (connection) socket
49 * @SOCK_DGRAM: datagram (conn.less) socket
50 * @SOCK_RAW: raw socket
51 * @SOCK_RDM: reliably-delivered message
52 * @SOCK_SEQPACKET: sequential packet socket
53 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
54 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
55 * For writing rarp and other similar things on the user level.
56 *
57 * When adding some new socket type please
58 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
59 * overrides this enum for binary compat reasons.
60 */
61enum sock_type {
62 SOCK_STREAM = 1,
63 SOCK_DGRAM = 2,
64 SOCK_RAW = 3,
65 SOCK_RDM = 4,
66 SOCK_SEQPACKET = 5,
67 SOCK_DCCP = 6,
68 SOCK_PACKET = 10,
69};
70
71#define SOCK_MAX (SOCK_PACKET + 1)
72/* Mask which covers at least up to SOCK_MASK-1. The
73 * remaining bits are used as flags. */
74#define SOCK_TYPE_MASK 0xf
75
76/* Flags for socket, socketpair, accept4 */
77#define SOCK_CLOEXEC O_CLOEXEC
78#ifndef SOCK_NONBLOCK
79#define SOCK_NONBLOCK O_NONBLOCK
80#endif
81
82#endif /* ARCH_HAS_SOCKET_TYPES */
83
84/**
85 * enum sock_shutdown_cmd - Shutdown types
86 * @SHUT_RD: shutdown receptions
87 * @SHUT_WR: shutdown transmissions
88 * @SHUT_RDWR: shutdown receptions/transmissions
89 */
90enum sock_shutdown_cmd {
91 SHUT_RD,
92 SHUT_WR,
93 SHUT_RDWR,
94};
95
96struct socket_wq {
97 /* Note: wait MUST be first field of socket_wq */
98 wait_queue_head_t wait;
99 struct fasync_struct *fasync_list;
100 unsigned long flags; /* %SOCKWQ_ASYNC_NOSPACE, etc */
101 struct rcu_head rcu;
102} ____cacheline_aligned_in_smp;
103
104/**
105 * struct socket - general BSD socket
106 * @state: socket state (%SS_CONNECTED, etc)
107 * @type: socket type (%SOCK_STREAM, etc)
108 * @flags: socket flags (%SOCK_NOSPACE, etc)
109 * @ops: protocol specific socket operations
110 * @file: File back pointer for gc
111 * @sk: internal networking protocol agnostic socket representation
112 * @wq: wait queue for several uses
113 */
114struct socket {
115 socket_state state;
116
117 short type;
118
119 unsigned long flags;
120
121 struct file *file;
122 struct sock *sk;
123 const struct proto_ops *ops;
124
125 struct socket_wq wq;
126};
127
128struct vm_area_struct;
129struct page;
130struct sockaddr;
131struct msghdr;
132struct module;
133struct sk_buff;
134typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
135 unsigned int, size_t);
136
137struct proto_ops {
138 int family;
139 struct module *owner;
140 int (*release) (struct socket *sock);
141 int (*bind) (struct socket *sock,
142 struct sockaddr *myaddr,
143 int sockaddr_len);
144 int (*connect) (struct socket *sock,
145 struct sockaddr *vaddr,
146 int sockaddr_len, int flags);
147 int (*socketpair)(struct socket *sock1,
148 struct socket *sock2);
149 int (*accept) (struct socket *sock,
150 struct socket *newsock, int flags, bool kern);
151 int (*getname) (struct socket *sock,
152 struct sockaddr *addr,
153 int peer);
154 __poll_t (*poll) (struct file *file, struct socket *sock,
155 struct poll_table_struct *wait);
156 int (*ioctl) (struct socket *sock, unsigned int cmd,
157 unsigned long arg);
158#ifdef CONFIG_COMPAT
159 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
160 unsigned long arg);
161#endif
162 int (*gettstamp) (struct socket *sock, void __user *userstamp,
163 bool timeval, bool time32);
164 int (*listen) (struct socket *sock, int len);
165 int (*shutdown) (struct socket *sock, int flags);
166 int (*setsockopt)(struct socket *sock, int level,
167 int optname, sockptr_t optval,
168 unsigned int optlen);
169 int (*getsockopt)(struct socket *sock, int level,
170 int optname, char __user *optval, int __user *optlen);
171 void (*show_fdinfo)(struct seq_file *m, struct socket *sock);
172 int (*sendmsg) (struct socket *sock, struct msghdr *m,
173 size_t total_len);
174 /* Notes for implementing recvmsg:
175 * ===============================
176 * msg->msg_namelen should get updated by the recvmsg handlers
177 * iff msg_name != NULL. It is by default 0 to prevent
178 * returning uninitialized memory to user space. The recvfrom
179 * handlers can assume that msg.msg_name is either NULL or has
180 * a minimum size of sizeof(struct sockaddr_storage).
181 */
182 int (*recvmsg) (struct socket *sock, struct msghdr *m,
183 size_t total_len, int flags);
184 int (*mmap) (struct file *file, struct socket *sock,
185 struct vm_area_struct * vma);
186 ssize_t (*sendpage) (struct socket *sock, struct page *page,
187 int offset, size_t size, int flags);
188 ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
189 struct pipe_inode_info *pipe, size_t len, unsigned int flags);
190 int (*set_peek_off)(struct sock *sk, int val);
191 int (*peek_len)(struct socket *sock);
192
193 /* The following functions are called internally by kernel with
194 * sock lock already held.
195 */
196 int (*read_sock)(struct sock *sk, read_descriptor_t *desc,
197 sk_read_actor_t recv_actor);
198 int (*sendpage_locked)(struct sock *sk, struct page *page,
199 int offset, size_t size, int flags);
200 int (*sendmsg_locked)(struct sock *sk, struct msghdr *msg,
201 size_t size);
202 int (*set_rcvlowat)(struct sock *sk, int val);
203};
204
205#define DECLARE_SOCKADDR(type, dst, src) \
206 type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
207
208struct net_proto_family {
209 int family;
210 int (*create)(struct net *net, struct socket *sock,
211 int protocol, int kern);
212 struct module *owner;
213};
214
215struct iovec;
216struct kvec;
217
218enum {
219 SOCK_WAKE_IO,
220 SOCK_WAKE_WAITD,
221 SOCK_WAKE_SPACE,
222 SOCK_WAKE_URG,
223};
224
225int sock_wake_async(struct socket_wq *sk_wq, int how, int band);
226int sock_register(const struct net_proto_family *fam);
227void sock_unregister(int family);
228bool sock_is_registered(int family);
229int __sock_create(struct net *net, int family, int type, int proto,
230 struct socket **res, int kern);
231int sock_create(int family, int type, int proto, struct socket **res);
232int sock_create_kern(struct net *net, int family, int type, int proto, struct socket **res);
233int sock_create_lite(int family, int type, int proto, struct socket **res);
234struct socket *sock_alloc(void);
235void sock_release(struct socket *sock);
236int sock_sendmsg(struct socket *sock, struct msghdr *msg);
237int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags);
238struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname);
239struct socket *sockfd_lookup(int fd, int *err);
240struct socket *sock_from_file(struct file *file, int *err);
241#define sockfd_put(sock) fput(sock->file)
242int net_ratelimit(void);
243
244#define net_ratelimited_function(function, ...) \
245do { \
246 if (net_ratelimit()) \
247 function(__VA_ARGS__); \
248} while (0)
249
250#define net_emerg_ratelimited(fmt, ...) \
251 net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__)
252#define net_alert_ratelimited(fmt, ...) \
253 net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__)
254#define net_crit_ratelimited(fmt, ...) \
255 net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__)
256#define net_err_ratelimited(fmt, ...) \
257 net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__)
258#define net_notice_ratelimited(fmt, ...) \
259 net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__)
260#define net_warn_ratelimited(fmt, ...) \
261 net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__)
262#define net_info_ratelimited(fmt, ...) \
263 net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
264#if defined(CONFIG_DYNAMIC_DEBUG) || \
265 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
266#define net_dbg_ratelimited(fmt, ...) \
267do { \
268 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
269 if (DYNAMIC_DEBUG_BRANCH(descriptor) && \
270 net_ratelimit()) \
271 __dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
272 ##__VA_ARGS__); \
273} while (0)
274#elif defined(DEBUG)
275#define net_dbg_ratelimited(fmt, ...) \
276 net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__)
277#else
278#define net_dbg_ratelimited(fmt, ...) \
279 do { \
280 if (0) \
281 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
282 } while (0)
283#endif
284
285#define net_get_random_once(buf, nbytes) \
286 get_random_once((buf), (nbytes))
287#define net_get_random_once_wait(buf, nbytes) \
288 get_random_once_wait((buf), (nbytes))
289
290/*
291 * E.g. XFS meta- & log-data is in slab pages, or bcache meta
292 * data pages, or other high order pages allocated by
293 * __get_free_pages() without __GFP_COMP, which have a page_count
294 * of 0 and/or have PageSlab() set. We cannot use send_page for
295 * those, as that does get_page(); put_page(); and would cause
296 * either a VM_BUG directly, or __page_cache_release a page that
297 * would actually still be referenced by someone, leading to some
298 * obscure delayed Oops somewhere else.
299 */
300static inline bool sendpage_ok(struct page *page)
301{
302 return !PageSlab(page) && page_count(page) >= 1;
303}
304
305int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
306 size_t num, size_t len);
307int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg,
308 struct kvec *vec, size_t num, size_t len);
309int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
310 size_t num, size_t len, int flags);
311
312int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen);
313int kernel_listen(struct socket *sock, int backlog);
314int kernel_accept(struct socket *sock, struct socket **newsock, int flags);
315int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
316 int flags);
317int kernel_getsockname(struct socket *sock, struct sockaddr *addr);
318int kernel_getpeername(struct socket *sock, struct sockaddr *addr);
319int kernel_sendpage(struct socket *sock, struct page *page, int offset,
320 size_t size, int flags);
321int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
322 size_t size, int flags);
323int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how);
324
325/* Routine returns the IP overhead imposed by a (caller-protected) socket. */
326u32 kernel_sock_ip_overhead(struct sock *sk);
327
328#define MODULE_ALIAS_NETPROTO(proto) \
329 MODULE_ALIAS("net-pf-" __stringify(proto))
330
331#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
332 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
333
334#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
335 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
336 "-type-" __stringify(type))
337
338#define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
339 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
340 name)
341#endif /* _LINUX_NET_H */
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/socket.h>
22#include <asm/socket.h>
23
24#define NPROTO AF_MAX
25
26#define SYS_SOCKET 1 /* sys_socket(2) */
27#define SYS_BIND 2 /* sys_bind(2) */
28#define SYS_CONNECT 3 /* sys_connect(2) */
29#define SYS_LISTEN 4 /* sys_listen(2) */
30#define SYS_ACCEPT 5 /* sys_accept(2) */
31#define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */
32#define SYS_GETPEERNAME 7 /* sys_getpeername(2) */
33#define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */
34#define SYS_SEND 9 /* sys_send(2) */
35#define SYS_RECV 10 /* sys_recv(2) */
36#define SYS_SENDTO 11 /* sys_sendto(2) */
37#define SYS_RECVFROM 12 /* sys_recvfrom(2) */
38#define SYS_SHUTDOWN 13 /* sys_shutdown(2) */
39#define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */
40#define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */
41#define SYS_SENDMSG 16 /* sys_sendmsg(2) */
42#define SYS_RECVMSG 17 /* sys_recvmsg(2) */
43#define SYS_ACCEPT4 18 /* sys_accept4(2) */
44#define SYS_RECVMMSG 19 /* sys_recvmmsg(2) */
45#define SYS_SENDMMSG 20 /* sys_sendmmsg(2) */
46
47typedef enum {
48 SS_FREE = 0, /* not allocated */
49 SS_UNCONNECTED, /* unconnected to any socket */
50 SS_CONNECTING, /* in process of connecting */
51 SS_CONNECTED, /* connected to socket */
52 SS_DISCONNECTING /* in process of disconnecting */
53} socket_state;
54
55#define __SO_ACCEPTCON (1 << 16) /* performed a listen */
56
57#ifdef __KERNEL__
58#include <linux/stringify.h>
59#include <linux/random.h>
60#include <linux/wait.h>
61#include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
62#include <linux/kmemcheck.h>
63#include <linux/rcupdate.h>
64
65struct poll_table_struct;
66struct pipe_inode_info;
67struct inode;
68struct net;
69
70#define SOCK_ASYNC_NOSPACE 0
71#define SOCK_ASYNC_WAITDATA 1
72#define SOCK_NOSPACE 2
73#define SOCK_PASSCRED 3
74#define SOCK_PASSSEC 4
75#define SOCK_EXTERNALLY_ALLOCATED 5
76
77#ifndef ARCH_HAS_SOCKET_TYPES
78/**
79 * enum sock_type - Socket types
80 * @SOCK_STREAM: stream (connection) socket
81 * @SOCK_DGRAM: datagram (conn.less) socket
82 * @SOCK_RAW: raw socket
83 * @SOCK_RDM: reliably-delivered message
84 * @SOCK_SEQPACKET: sequential packet socket
85 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
86 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
87 * For writing rarp and other similar things on the user level.
88 *
89 * When adding some new socket type please
90 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
91 * overrides this enum for binary compat reasons.
92 */
93enum sock_type {
94 SOCK_STREAM = 1,
95 SOCK_DGRAM = 2,
96 SOCK_RAW = 3,
97 SOCK_RDM = 4,
98 SOCK_SEQPACKET = 5,
99 SOCK_DCCP = 6,
100 SOCK_PACKET = 10,
101};
102
103#define SOCK_MAX (SOCK_PACKET + 1)
104/* Mask which covers at least up to SOCK_MASK-1. The
105 * remaining bits are used as flags. */
106#define SOCK_TYPE_MASK 0xf
107
108/* Flags for socket, socketpair, accept4 */
109#define SOCK_CLOEXEC O_CLOEXEC
110#ifndef SOCK_NONBLOCK
111#define SOCK_NONBLOCK O_NONBLOCK
112#endif
113
114#endif /* ARCH_HAS_SOCKET_TYPES */
115
116enum sock_shutdown_cmd {
117 SHUT_RD = 0,
118 SHUT_WR = 1,
119 SHUT_RDWR = 2,
120};
121
122struct socket_wq {
123 /* Note: wait MUST be first field of socket_wq */
124 wait_queue_head_t wait;
125 struct fasync_struct *fasync_list;
126 struct rcu_head rcu;
127} ____cacheline_aligned_in_smp;
128
129/**
130 * struct socket - general BSD socket
131 * @state: socket state (%SS_CONNECTED, etc)
132 * @type: socket type (%SOCK_STREAM, etc)
133 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
134 * @ops: protocol specific socket operations
135 * @file: File back pointer for gc
136 * @sk: internal networking protocol agnostic socket representation
137 * @wq: wait queue for several uses
138 */
139struct socket {
140 socket_state state;
141
142 kmemcheck_bitfield_begin(type);
143 short type;
144 kmemcheck_bitfield_end(type);
145
146 unsigned long flags;
147
148 struct socket_wq __rcu *wq;
149
150 struct file *file;
151 struct sock *sk;
152 const struct proto_ops *ops;
153};
154
155struct vm_area_struct;
156struct page;
157struct kiocb;
158struct sockaddr;
159struct msghdr;
160struct module;
161
162struct proto_ops {
163 int family;
164 struct module *owner;
165 int (*release) (struct socket *sock);
166 int (*bind) (struct socket *sock,
167 struct sockaddr *myaddr,
168 int sockaddr_len);
169 int (*connect) (struct socket *sock,
170 struct sockaddr *vaddr,
171 int sockaddr_len, int flags);
172 int (*socketpair)(struct socket *sock1,
173 struct socket *sock2);
174 int (*accept) (struct socket *sock,
175 struct socket *newsock, int flags);
176 int (*getname) (struct socket *sock,
177 struct sockaddr *addr,
178 int *sockaddr_len, int peer);
179 unsigned int (*poll) (struct file *file, struct socket *sock,
180 struct poll_table_struct *wait);
181 int (*ioctl) (struct socket *sock, unsigned int cmd,
182 unsigned long arg);
183#ifdef CONFIG_COMPAT
184 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
185 unsigned long arg);
186#endif
187 int (*listen) (struct socket *sock, int len);
188 int (*shutdown) (struct socket *sock, int flags);
189 int (*setsockopt)(struct socket *sock, int level,
190 int optname, char __user *optval, unsigned int optlen);
191 int (*getsockopt)(struct socket *sock, int level,
192 int optname, char __user *optval, int __user *optlen);
193#ifdef CONFIG_COMPAT
194 int (*compat_setsockopt)(struct socket *sock, int level,
195 int optname, char __user *optval, unsigned int optlen);
196 int (*compat_getsockopt)(struct socket *sock, int level,
197 int optname, char __user *optval, int __user *optlen);
198#endif
199 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
200 struct msghdr *m, size_t total_len);
201 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
202 struct msghdr *m, size_t total_len,
203 int flags);
204 int (*mmap) (struct file *file, struct socket *sock,
205 struct vm_area_struct * vma);
206 ssize_t (*sendpage) (struct socket *sock, struct page *page,
207 int offset, size_t size, int flags);
208 ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
209 struct pipe_inode_info *pipe, size_t len, unsigned int flags);
210 void (*set_peek_off)(struct sock *sk, int val);
211};
212
213#define DECLARE_SOCKADDR(type, dst, src) \
214 type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
215
216struct net_proto_family {
217 int family;
218 int (*create)(struct net *net, struct socket *sock,
219 int protocol, int kern);
220 struct module *owner;
221};
222
223struct iovec;
224struct kvec;
225
226enum {
227 SOCK_WAKE_IO,
228 SOCK_WAKE_WAITD,
229 SOCK_WAKE_SPACE,
230 SOCK_WAKE_URG,
231};
232
233extern int sock_wake_async(struct socket *sk, int how, int band);
234extern int sock_register(const struct net_proto_family *fam);
235extern void sock_unregister(int family);
236extern int __sock_create(struct net *net, int family, int type, int proto,
237 struct socket **res, int kern);
238extern int sock_create(int family, int type, int proto,
239 struct socket **res);
240extern int sock_create_kern(int family, int type, int proto,
241 struct socket **res);
242extern int sock_create_lite(int family, int type, int proto,
243 struct socket **res);
244extern void sock_release(struct socket *sock);
245extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
246 size_t len);
247extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
248 size_t size, int flags);
249extern int sock_map_fd(struct socket *sock, int flags);
250extern struct socket *sockfd_lookup(int fd, int *err);
251#define sockfd_put(sock) fput(sock->file)
252extern int net_ratelimit(void);
253
254#define net_ratelimited_function(function, ...) \
255do { \
256 if (net_ratelimit()) \
257 function(__VA_ARGS__); \
258} while (0)
259
260#define net_emerg_ratelimited(fmt, ...) \
261 net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__)
262#define net_alert_ratelimited(fmt, ...) \
263 net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__)
264#define net_crit_ratelimited(fmt, ...) \
265 net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__)
266#define net_err_ratelimited(fmt, ...) \
267 net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__)
268#define net_notice_ratelimited(fmt, ...) \
269 net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__)
270#define net_warn_ratelimited(fmt, ...) \
271 net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__)
272#define net_info_ratelimited(fmt, ...) \
273 net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
274#define net_dbg_ratelimited(fmt, ...) \
275 net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__)
276
277#define net_random() random32()
278#define net_srandom(seed) srandom32((__force u32)seed)
279
280extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
281 struct kvec *vec, size_t num, size_t len);
282extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
283 struct kvec *vec, size_t num,
284 size_t len, int flags);
285
286extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
287 int addrlen);
288extern int kernel_listen(struct socket *sock, int backlog);
289extern int kernel_accept(struct socket *sock, struct socket **newsock,
290 int flags);
291extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
292 int addrlen, int flags);
293extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
294 int *addrlen);
295extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
296 int *addrlen);
297extern int kernel_getsockopt(struct socket *sock, int level, int optname,
298 char *optval, int *optlen);
299extern int kernel_setsockopt(struct socket *sock, int level, int optname,
300 char *optval, unsigned int optlen);
301extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
302 size_t size, int flags);
303extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
304extern int kernel_sock_shutdown(struct socket *sock,
305 enum sock_shutdown_cmd how);
306
307#define MODULE_ALIAS_NETPROTO(proto) \
308 MODULE_ALIAS("net-pf-" __stringify(proto))
309
310#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
311 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
312
313#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
314 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
315 "-type-" __stringify(type))
316
317#define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
318 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
319 name)
320#endif /* __KERNEL__ */
321#endif /* _LINUX_NET_H */