Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
[cris-mirror.git] / include / linux / net.h
blob94de83c0f877629a4d25d8fedfd8fff290550e9e
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.
7 * Version: @(#)net.h 1.0.3 05/25/93
9 * Authors: Orest Zborowski, <obz@Kodak.COM>
10 * Ross Biro
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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.
18 #ifndef _LINUX_NET_H
19 #define _LINUX_NET_H
21 #include <linux/socket.h>
22 #include <asm/socket.h>
24 #define NPROTO AF_MAX
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) */
46 typedef enum {
47 SS_FREE = 0, /* not allocated */
48 SS_UNCONNECTED, /* unconnected to any socket */
49 SS_CONNECTING, /* in process of connecting */
50 SS_CONNECTED, /* connected to socket */
51 SS_DISCONNECTING /* in process of disconnecting */
52 } socket_state;
54 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */
56 #ifdef __KERNEL__
57 #include <linux/stringify.h>
58 #include <linux/random.h>
59 #include <linux/wait.h>
60 #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
61 #include <linux/kmemcheck.h>
62 #include <linux/rcupdate.h>
64 struct poll_table_struct;
65 struct pipe_inode_info;
66 struct inode;
67 struct net;
69 #define SOCK_ASYNC_NOSPACE 0
70 #define SOCK_ASYNC_WAITDATA 1
71 #define SOCK_NOSPACE 2
72 #define SOCK_PASSCRED 3
73 #define SOCK_PASSSEC 4
75 #ifndef ARCH_HAS_SOCKET_TYPES
76 /**
77 * enum sock_type - Socket types
78 * @SOCK_STREAM: stream (connection) socket
79 * @SOCK_DGRAM: datagram (conn.less) socket
80 * @SOCK_RAW: raw socket
81 * @SOCK_RDM: reliably-delivered message
82 * @SOCK_SEQPACKET: sequential packet socket
83 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
84 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
85 * For writing rarp and other similar things on the user level.
87 * When adding some new socket type please
88 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
89 * overrides this enum for binary compat reasons.
91 enum sock_type {
92 SOCK_STREAM = 1,
93 SOCK_DGRAM = 2,
94 SOCK_RAW = 3,
95 SOCK_RDM = 4,
96 SOCK_SEQPACKET = 5,
97 SOCK_DCCP = 6,
98 SOCK_PACKET = 10,
101 #define SOCK_MAX (SOCK_PACKET + 1)
102 /* Mask which covers at least up to SOCK_MASK-1. The
103 * remaining bits are used as flags. */
104 #define SOCK_TYPE_MASK 0xf
106 /* Flags for socket, socketpair, accept4 */
107 #define SOCK_CLOEXEC O_CLOEXEC
108 #ifndef SOCK_NONBLOCK
109 #define SOCK_NONBLOCK O_NONBLOCK
110 #endif
112 #endif /* ARCH_HAS_SOCKET_TYPES */
114 enum sock_shutdown_cmd {
115 SHUT_RD = 0,
116 SHUT_WR = 1,
117 SHUT_RDWR = 2,
120 struct socket_wq {
121 /* Note: wait MUST be first field of socket_wq */
122 wait_queue_head_t wait;
123 struct fasync_struct *fasync_list;
124 struct rcu_head rcu;
125 } ____cacheline_aligned_in_smp;
128 * struct socket - general BSD socket
129 * @state: socket state (%SS_CONNECTED, etc)
130 * @type: socket type (%SOCK_STREAM, etc)
131 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
132 * @ops: protocol specific socket operations
133 * @file: File back pointer for gc
134 * @sk: internal networking protocol agnostic socket representation
135 * @wq: wait queue for several uses
137 struct socket {
138 socket_state state;
140 kmemcheck_bitfield_begin(type);
141 short type;
142 kmemcheck_bitfield_end(type);
144 unsigned long flags;
146 struct socket_wq __rcu *wq;
148 struct file *file;
149 struct sock *sk;
150 const struct proto_ops *ops;
153 struct vm_area_struct;
154 struct page;
155 struct kiocb;
156 struct sockaddr;
157 struct msghdr;
158 struct module;
160 struct proto_ops {
161 int family;
162 struct module *owner;
163 int (*release) (struct socket *sock);
164 int (*bind) (struct socket *sock,
165 struct sockaddr *myaddr,
166 int sockaddr_len);
167 int (*connect) (struct socket *sock,
168 struct sockaddr *vaddr,
169 int sockaddr_len, int flags);
170 int (*socketpair)(struct socket *sock1,
171 struct socket *sock2);
172 int (*accept) (struct socket *sock,
173 struct socket *newsock, int flags);
174 int (*getname) (struct socket *sock,
175 struct sockaddr *addr,
176 int *sockaddr_len, int peer);
177 unsigned int (*poll) (struct file *file, struct socket *sock,
178 struct poll_table_struct *wait);
179 int (*ioctl) (struct socket *sock, unsigned int cmd,
180 unsigned long arg);
181 #ifdef CONFIG_COMPAT
182 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
183 unsigned long arg);
184 #endif
185 int (*listen) (struct socket *sock, int len);
186 int (*shutdown) (struct socket *sock, int flags);
187 int (*setsockopt)(struct socket *sock, int level,
188 int optname, char __user *optval, unsigned int optlen);
189 int (*getsockopt)(struct socket *sock, int level,
190 int optname, char __user *optval, int __user *optlen);
191 #ifdef CONFIG_COMPAT
192 int (*compat_setsockopt)(struct socket *sock, int level,
193 int optname, char __user *optval, unsigned int optlen);
194 int (*compat_getsockopt)(struct socket *sock, int level,
195 int optname, char __user *optval, int __user *optlen);
196 #endif
197 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
198 struct msghdr *m, size_t total_len);
199 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
200 struct msghdr *m, size_t total_len,
201 int flags);
202 int (*mmap) (struct file *file, struct socket *sock,
203 struct vm_area_struct * vma);
204 ssize_t (*sendpage) (struct socket *sock, struct page *page,
205 int offset, size_t size, int flags);
206 ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
207 struct pipe_inode_info *pipe, size_t len, unsigned int flags);
210 #define DECLARE_SOCKADDR(type, dst, src) \
211 type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
213 struct net_proto_family {
214 int family;
215 int (*create)(struct net *net, struct socket *sock,
216 int protocol, int kern);
217 struct module *owner;
220 struct iovec;
221 struct kvec;
223 enum {
224 SOCK_WAKE_IO,
225 SOCK_WAKE_WAITD,
226 SOCK_WAKE_SPACE,
227 SOCK_WAKE_URG,
230 extern int sock_wake_async(struct socket *sk, int how, int band);
231 extern int sock_register(const struct net_proto_family *fam);
232 extern void sock_unregister(int family);
233 extern int __sock_create(struct net *net, int family, int type, int proto,
234 struct socket **res, int kern);
235 extern int sock_create(int family, int type, int proto,
236 struct socket **res);
237 extern int sock_create_kern(int family, int type, int proto,
238 struct socket **res);
239 extern int sock_create_lite(int family, int type, int proto,
240 struct socket **res);
241 extern void sock_release(struct socket *sock);
242 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
243 size_t len);
244 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
245 size_t size, int flags);
246 extern int sock_map_fd(struct socket *sock, int flags);
247 extern struct socket *sockfd_lookup(int fd, int *err);
248 #define sockfd_put(sock) fput(sock->file)
249 extern int net_ratelimit(void);
251 #define net_random() random32()
252 #define net_srandom(seed) srandom32((__force u32)seed)
254 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
255 struct kvec *vec, size_t num, size_t len);
256 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
257 struct kvec *vec, size_t num,
258 size_t len, int flags);
260 extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
261 int addrlen);
262 extern int kernel_listen(struct socket *sock, int backlog);
263 extern int kernel_accept(struct socket *sock, struct socket **newsock,
264 int flags);
265 extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
266 int addrlen, int flags);
267 extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
268 int *addrlen);
269 extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
270 int *addrlen);
271 extern int kernel_getsockopt(struct socket *sock, int level, int optname,
272 char *optval, int *optlen);
273 extern int kernel_setsockopt(struct socket *sock, int level, int optname,
274 char *optval, unsigned int optlen);
275 extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
276 size_t size, int flags);
277 extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
278 extern int kernel_sock_shutdown(struct socket *sock,
279 enum sock_shutdown_cmd how);
281 #define MODULE_ALIAS_NETPROTO(proto) \
282 MODULE_ALIAS("net-pf-" __stringify(proto))
284 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
285 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
287 #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
288 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
289 "-type-" __stringify(type))
291 #ifdef CONFIG_SYSCTL
292 #include <linux/sysctl.h>
293 #include <linux/ratelimit.h>
294 extern struct ratelimit_state net_ratelimit_state;
295 #endif
297 #endif /* __KERNEL__ */
298 #endif /* _LINUX_NET_H */