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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>
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
36
37
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
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59
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
73
74#define SOCK_TYPE_MASK 0xf
75
76
77#define SOCK_CLOEXEC O_CLOEXEC
78#ifndef SOCK_NONBLOCK
79#define SOCK_NONBLOCK O_NONBLOCK
80#endif
81
82#endif
83
84
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87
88
89
90enum sock_shutdown_cmd {
91 SHUT_RD,
92 SHUT_WR,
93 SHUT_RDWR,
94};
95
96struct socket_wq {
97
98 wait_queue_head_t wait;
99 struct fasync_struct *fasync_list;
100 unsigned long flags;
101 struct rcu_head rcu;
102} ____cacheline_aligned_in_smp;
103
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111
112
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
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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
194
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);
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
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298
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
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
342