ia64/linux-2.6.18-xen.hg

view net/ax25/ax25_iface.c @ 673:3161879fdf22

[IA64] xencomm: support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap

support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Tue Sep 16 21:26:15 2008 +0900 (2008-09-16)
parents 831230e53067
children
line source
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 */
9 #include <linux/errno.h>
10 #include <linux/types.h>
11 #include <linux/socket.h>
12 #include <linux/in.h>
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/sched.h>
16 #include <linux/spinlock.h>
17 #include <linux/timer.h>
18 #include <linux/string.h>
19 #include <linux/sockios.h>
20 #include <linux/net.h>
21 #include <net/ax25.h>
22 #include <linux/inet.h>
23 #include <linux/netdevice.h>
24 #include <linux/skbuff.h>
25 #include <net/sock.h>
26 #include <asm/uaccess.h>
27 #include <asm/system.h>
28 #include <linux/fcntl.h>
29 #include <linux/mm.h>
30 #include <linux/interrupt.h>
32 static struct protocol_struct {
33 struct protocol_struct *next;
34 unsigned int pid;
35 int (*func)(struct sk_buff *, ax25_cb *);
36 } *protocol_list = NULL;
37 static DEFINE_RWLOCK(protocol_list_lock);
39 static struct linkfail_struct {
40 struct linkfail_struct *next;
41 void (*func)(ax25_cb *, int);
42 } *linkfail_list = NULL;
43 static DEFINE_SPINLOCK(linkfail_lock);
45 static struct listen_struct {
46 struct listen_struct *next;
47 ax25_address callsign;
48 struct net_device *dev;
49 } *listen_list = NULL;
50 static DEFINE_SPINLOCK(listen_lock);
52 int ax25_protocol_register(unsigned int pid,
53 int (*func)(struct sk_buff *, ax25_cb *))
54 {
55 struct protocol_struct *protocol;
57 if (pid == AX25_P_TEXT || pid == AX25_P_SEGMENT)
58 return 0;
59 #ifdef CONFIG_INET
60 if (pid == AX25_P_IP || pid == AX25_P_ARP)
61 return 0;
62 #endif
63 if ((protocol = kmalloc(sizeof(*protocol), GFP_ATOMIC)) == NULL)
64 return 0;
66 protocol->pid = pid;
67 protocol->func = func;
69 write_lock_bh(&protocol_list_lock);
70 protocol->next = protocol_list;
71 protocol_list = protocol;
72 write_unlock_bh(&protocol_list_lock);
74 return 1;
75 }
77 EXPORT_SYMBOL(ax25_protocol_register);
79 void ax25_protocol_release(unsigned int pid)
80 {
81 struct protocol_struct *s, *protocol;
83 write_lock_bh(&protocol_list_lock);
84 protocol = protocol_list;
85 if (protocol == NULL) {
86 write_unlock_bh(&protocol_list_lock);
87 return;
88 }
90 if (protocol->pid == pid) {
91 protocol_list = protocol->next;
92 write_unlock_bh(&protocol_list_lock);
93 kfree(protocol);
94 return;
95 }
97 while (protocol != NULL && protocol->next != NULL) {
98 if (protocol->next->pid == pid) {
99 s = protocol->next;
100 protocol->next = protocol->next->next;
101 write_unlock_bh(&protocol_list_lock);
102 kfree(s);
103 return;
104 }
106 protocol = protocol->next;
107 }
108 write_unlock_bh(&protocol_list_lock);
109 }
111 EXPORT_SYMBOL(ax25_protocol_release);
113 int ax25_linkfail_register(void (*func)(ax25_cb *, int))
114 {
115 struct linkfail_struct *linkfail;
117 if ((linkfail = kmalloc(sizeof(*linkfail), GFP_ATOMIC)) == NULL)
118 return 0;
120 linkfail->func = func;
122 spin_lock_bh(&linkfail_lock);
123 linkfail->next = linkfail_list;
124 linkfail_list = linkfail;
125 spin_unlock_bh(&linkfail_lock);
127 return 1;
128 }
130 EXPORT_SYMBOL(ax25_linkfail_register);
132 void ax25_linkfail_release(void (*func)(ax25_cb *, int))
133 {
134 struct linkfail_struct *s, *linkfail;
136 spin_lock_bh(&linkfail_lock);
137 linkfail = linkfail_list;
138 if (linkfail == NULL) {
139 spin_unlock_bh(&linkfail_lock);
140 return;
141 }
143 if (linkfail->func == func) {
144 linkfail_list = linkfail->next;
145 spin_unlock_bh(&linkfail_lock);
146 kfree(linkfail);
147 return;
148 }
150 while (linkfail != NULL && linkfail->next != NULL) {
151 if (linkfail->next->func == func) {
152 s = linkfail->next;
153 linkfail->next = linkfail->next->next;
154 spin_unlock_bh(&linkfail_lock);
155 kfree(s);
156 return;
157 }
159 linkfail = linkfail->next;
160 }
161 spin_unlock_bh(&linkfail_lock);
162 }
164 EXPORT_SYMBOL(ax25_linkfail_release);
166 int ax25_listen_register(ax25_address *callsign, struct net_device *dev)
167 {
168 struct listen_struct *listen;
170 if (ax25_listen_mine(callsign, dev))
171 return 0;
173 if ((listen = kmalloc(sizeof(*listen), GFP_ATOMIC)) == NULL)
174 return 0;
176 listen->callsign = *callsign;
177 listen->dev = dev;
179 spin_lock_bh(&listen_lock);
180 listen->next = listen_list;
181 listen_list = listen;
182 spin_unlock_bh(&listen_lock);
184 return 1;
185 }
187 EXPORT_SYMBOL(ax25_listen_register);
189 void ax25_listen_release(ax25_address *callsign, struct net_device *dev)
190 {
191 struct listen_struct *s, *listen;
193 spin_lock_bh(&listen_lock);
194 listen = listen_list;
195 if (listen == NULL) {
196 spin_unlock_bh(&listen_lock);
197 return;
198 }
200 if (ax25cmp(&listen->callsign, callsign) == 0 && listen->dev == dev) {
201 listen_list = listen->next;
202 spin_unlock_bh(&listen_lock);
203 kfree(listen);
204 return;
205 }
207 while (listen != NULL && listen->next != NULL) {
208 if (ax25cmp(&listen->next->callsign, callsign) == 0 && listen->next->dev == dev) {
209 s = listen->next;
210 listen->next = listen->next->next;
211 spin_unlock_bh(&listen_lock);
212 kfree(s);
213 return;
214 }
216 listen = listen->next;
217 }
218 spin_unlock_bh(&listen_lock);
219 }
221 EXPORT_SYMBOL(ax25_listen_release);
223 int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *)
224 {
225 int (*res)(struct sk_buff *, ax25_cb *) = NULL;
226 struct protocol_struct *protocol;
228 read_lock(&protocol_list_lock);
229 for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
230 if (protocol->pid == pid) {
231 res = protocol->func;
232 break;
233 }
234 read_unlock(&protocol_list_lock);
236 return res;
237 }
239 int ax25_listen_mine(ax25_address *callsign, struct net_device *dev)
240 {
241 struct listen_struct *listen;
243 spin_lock_bh(&listen_lock);
244 for (listen = listen_list; listen != NULL; listen = listen->next)
245 if (ax25cmp(&listen->callsign, callsign) == 0 && (listen->dev == dev || listen->dev == NULL)) {
246 spin_unlock_bh(&listen_lock);
247 return 1;
248 }
249 spin_unlock_bh(&listen_lock);
251 return 0;
252 }
254 void ax25_link_failed(ax25_cb *ax25, int reason)
255 {
256 struct linkfail_struct *linkfail;
258 spin_lock_bh(&linkfail_lock);
259 for (linkfail = linkfail_list; linkfail != NULL; linkfail = linkfail->next)
260 (linkfail->func)(ax25, reason);
261 spin_unlock_bh(&linkfail_lock);
262 }
264 int ax25_protocol_is_registered(unsigned int pid)
265 {
266 struct protocol_struct *protocol;
267 int res = 0;
269 read_lock_bh(&protocol_list_lock);
270 for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
271 if (protocol->pid == pid) {
272 res = 1;
273 break;
274 }
275 read_unlock_bh(&protocol_list_lock);
277 return res;
278 }