Bug fixes
[cbs-scheduler.git] / include / linux / net.h
blob4515efae4c392bf1c33441159163a04ba80a3ff6
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) */
45 typedef enum {
46 SS_FREE = 0, /* not allocated */
47 SS_UNCONNECTED, /* unconnected to any socket */
48 SS_CONNECTING, /* in process of connecting */
49 SS_CONNECTED, /* connected to socket */
50 SS_DISCONNECTING /* in process of disconnecting */
51 } socket_state;
53 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */
55 #ifdef __KERNEL__
56 #include <linux/stringify.h>
57 #include <linux/random.h>
58 #include <linux/wait.h>
59 #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
61 struct poll_table_struct;
62 struct pipe_inode_info;
63 struct inode;
64 struct net;
66 #define SOCK_ASYNC_NOSPACE 0
67 #define SOCK_ASYNC_WAITDATA 1
68 #define SOCK_NOSPACE 2
69 #define SOCK_PASSCRED 3
70 #define SOCK_PASSSEC 4
72 #ifndef ARCH_HAS_SOCKET_TYPES
73 /**
74 * enum sock_type - Socket types
75 * @SOCK_STREAM: stream (connection) socket
76 * @SOCK_DGRAM: datagram (conn.less) socket
77 * @SOCK_RAW: raw socket
78 * @SOCK_RDM: reliably-delivered message
79 * @SOCK_SEQPACKET: sequential packet socket
80 * @SOCK_DCCP: Datagram Congestion Control Protocol socket
81 * @SOCK_PACKET: linux specific way of getting packets at the dev level.
82 * For writing rarp and other similar things on the user level.
84 * When adding some new socket type please
85 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
86 * overrides this enum for binary compat reasons.
88 enum sock_type {
89 SOCK_STREAM = 1,
90 SOCK_DGRAM = 2,
91 SOCK_RAW = 3,
92 SOCK_RDM = 4,
93 SOCK_SEQPACKET = 5,
94 SOCK_DCCP = 6,
95 SOCK_PACKET = 10,
98 #define SOCK_MAX (SOCK_PACKET + 1)
99 /* Mask which covers at least up to SOCK_MASK-1. The
100 * remaining bits are used as flags. */
101 #define SOCK_TYPE_MASK 0xf
103 /* Flags for socket, socketpair, accept4 */
104 #define SOCK_CLOEXEC O_CLOEXEC
105 #ifndef SOCK_NONBLOCK
106 #define SOCK_NONBLOCK O_NONBLOCK
107 #endif
109 #endif /* ARCH_HAS_SOCKET_TYPES */
111 enum sock_shutdown_cmd {
112 SHUT_RD = 0,
113 SHUT_WR = 1,
114 SHUT_RDWR = 2,
118 * struct socket - general BSD socket
119 * @state: socket state (%SS_CONNECTED, etc)
120 * @type: socket type (%SOCK_STREAM, etc)
121 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
122 * @ops: protocol specific socket operations
123 * @fasync_list: Asynchronous wake up list
124 * @file: File back pointer for gc
125 * @sk: internal networking protocol agnostic socket representation
126 * @wait: wait queue for several uses
128 struct socket {
129 socket_state state;
130 short type;
131 unsigned long flags;
132 const struct proto_ops *ops;
133 struct fasync_struct *fasync_list;
134 struct file *file;
135 struct sock *sk;
136 wait_queue_head_t wait;
139 struct vm_area_struct;
140 struct page;
141 struct kiocb;
142 struct sockaddr;
143 struct msghdr;
144 struct module;
146 struct proto_ops {
147 int family;
148 struct module *owner;
149 int (*release) (struct socket *sock);
150 int (*bind) (struct socket *sock,
151 struct sockaddr *myaddr,
152 int sockaddr_len);
153 int (*connect) (struct socket *sock,
154 struct sockaddr *vaddr,
155 int sockaddr_len, int flags);
156 int (*socketpair)(struct socket *sock1,
157 struct socket *sock2);
158 int (*accept) (struct socket *sock,
159 struct socket *newsock, int flags);
160 int (*getname) (struct socket *sock,
161 struct sockaddr *addr,
162 int *sockaddr_len, int peer);
163 unsigned int (*poll) (struct file *file, struct socket *sock,
164 struct poll_table_struct *wait);
165 int (*ioctl) (struct socket *sock, unsigned int cmd,
166 unsigned long arg);
167 int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
168 unsigned long arg);
169 int (*listen) (struct socket *sock, int len);
170 int (*shutdown) (struct socket *sock, int flags);
171 int (*setsockopt)(struct socket *sock, int level,
172 int optname, char __user *optval, int optlen);
173 int (*getsockopt)(struct socket *sock, int level,
174 int optname, char __user *optval, int __user *optlen);
175 int (*compat_setsockopt)(struct socket *sock, int level,
176 int optname, char __user *optval, int optlen);
177 int (*compat_getsockopt)(struct socket *sock, int level,
178 int optname, char __user *optval, int __user *optlen);
179 int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
180 struct msghdr *m, size_t total_len);
181 int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
182 struct msghdr *m, size_t total_len,
183 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);
192 struct net_proto_family {
193 int family;
194 int (*create)(struct net *net, struct socket *sock, int protocol);
195 struct module *owner;
198 struct iovec;
199 struct kvec;
201 enum {
202 SOCK_WAKE_IO,
203 SOCK_WAKE_WAITD,
204 SOCK_WAKE_SPACE,
205 SOCK_WAKE_URG,
208 extern int sock_wake_async(struct socket *sk, int how, int band);
209 extern int sock_register(const struct net_proto_family *fam);
210 extern void sock_unregister(int family);
211 extern int sock_create(int family, int type, int proto,
212 struct socket **res);
213 extern int sock_create_kern(int family, int type, int proto,
214 struct socket **res);
215 extern int sock_create_lite(int family, int type, int proto,
216 struct socket **res);
217 extern void sock_release(struct socket *sock);
218 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
219 size_t len);
220 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
221 size_t size, int flags);
222 extern int sock_map_fd(struct socket *sock, int flags);
223 extern struct socket *sockfd_lookup(int fd, int *err);
224 #define sockfd_put(sock) fput(sock->file)
225 extern int net_ratelimit(void);
227 #define net_random() random32()
228 #define net_srandom(seed) srandom32((__force u32)seed)
230 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
231 struct kvec *vec, size_t num, size_t len);
232 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
233 struct kvec *vec, size_t num,
234 size_t len, int flags);
236 extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
237 int addrlen);
238 extern int kernel_listen(struct socket *sock, int backlog);
239 extern int kernel_accept(struct socket *sock, struct socket **newsock,
240 int flags);
241 extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
242 int addrlen, int flags);
243 extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
244 int *addrlen);
245 extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
246 int *addrlen);
247 extern int kernel_getsockopt(struct socket *sock, int level, int optname,
248 char *optval, int *optlen);
249 extern int kernel_setsockopt(struct socket *sock, int level, int optname,
250 char *optval, int optlen);
251 extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
252 size_t size, int flags);
253 extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
254 extern int kernel_sock_shutdown(struct socket *sock,
255 enum sock_shutdown_cmd how);
257 #ifndef CONFIG_SMP
258 #define SOCKOPS_WRAPPED(name) name
259 #define SOCKOPS_WRAP(name, fam)
260 #else
262 #define SOCKOPS_WRAPPED(name) __unlocked_##name
264 #define SOCKCALL_WRAP(name, call, parms, args) \
265 static int __lock_##name##_##call parms \
267 int ret; \
268 lock_kernel(); \
269 ret = __unlocked_##name##_ops.call args ;\
270 unlock_kernel(); \
271 return ret; \
274 #define SOCKCALL_UWRAP(name, call, parms, args) \
275 static unsigned int __lock_##name##_##call parms \
277 int ret; \
278 lock_kernel(); \
279 ret = __unlocked_##name##_ops.call args ;\
280 unlock_kernel(); \
281 return ret; \
285 #define SOCKOPS_WRAP(name, fam) \
286 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
287 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
288 (sock, uaddr, addr_len)) \
289 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
290 int addr_len, int flags), \
291 (sock, uaddr, addr_len, flags)) \
292 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
293 (sock1, sock2)) \
294 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
295 int flags), (sock, newsock, flags)) \
296 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
297 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
298 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
299 (file, sock, wait)) \
300 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
301 unsigned long arg), (sock, cmd, arg)) \
302 SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
303 unsigned long arg), (sock, cmd, arg)) \
304 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
305 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
306 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
307 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
308 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
309 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
310 SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
311 (iocb, sock, m, len)) \
312 SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
313 (iocb, sock, m, len, flags)) \
314 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
315 (file, sock, vma)) \
317 static const struct proto_ops name##_ops = { \
318 .family = fam, \
319 .owner = THIS_MODULE, \
320 .release = __lock_##name##_release, \
321 .bind = __lock_##name##_bind, \
322 .connect = __lock_##name##_connect, \
323 .socketpair = __lock_##name##_socketpair, \
324 .accept = __lock_##name##_accept, \
325 .getname = __lock_##name##_getname, \
326 .poll = __lock_##name##_poll, \
327 .ioctl = __lock_##name##_ioctl, \
328 .compat_ioctl = __lock_##name##_compat_ioctl, \
329 .listen = __lock_##name##_listen, \
330 .shutdown = __lock_##name##_shutdown, \
331 .setsockopt = __lock_##name##_setsockopt, \
332 .getsockopt = __lock_##name##_getsockopt, \
333 .sendmsg = __lock_##name##_sendmsg, \
334 .recvmsg = __lock_##name##_recvmsg, \
335 .mmap = __lock_##name##_mmap, \
338 #endif
340 #define MODULE_ALIAS_NETPROTO(proto) \
341 MODULE_ALIAS("net-pf-" __stringify(proto))
343 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
344 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
346 #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
347 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
348 "-type-" __stringify(type))
350 #ifdef CONFIG_SYSCTL
351 #include <linux/sysctl.h>
352 extern struct ratelimit_state net_ratelimit_state;
353 #endif
355 #endif /* __KERNEL__ */
356 #endif /* _LINUX_NET_H */