KMS: fix EDID detailed timing vsync parsing
[linux-2.6/cjktty.git] / net / ax25 / ax25_dev.c
blob3d106767b272522dc8ea86dad471dda247b95d96
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.
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/slab.h>
13 #include <linux/in.h>
14 #include <linux/kernel.h>
15 #include <linux/timer.h>
16 #include <linux/string.h>
17 #include <linux/sockios.h>
18 #include <linux/net.h>
19 #include <linux/spinlock.h>
20 #include <net/ax25.h>
21 #include <linux/inet.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/skbuff.h>
25 #include <net/sock.h>
26 #include <asm/uaccess.h>
27 #include <linux/fcntl.h>
28 #include <linux/mm.h>
29 #include <linux/interrupt.h>
30 #include <linux/init.h>
32 ax25_dev *ax25_dev_list;
33 DEFINE_SPINLOCK(ax25_dev_lock);
35 ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
37 ax25_dev *ax25_dev, *res = NULL;
39 spin_lock_bh(&ax25_dev_lock);
40 for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
41 if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) {
42 res = ax25_dev;
44 spin_unlock_bh(&ax25_dev_lock);
46 return res;
50 * This is called when an interface is brought up. These are
51 * reasonable defaults.
53 void ax25_dev_device_up(struct net_device *dev)
55 ax25_dev *ax25_dev;
57 if ((ax25_dev = kzalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) {
58 printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n");
59 return;
62 dev->ax25_ptr = ax25_dev;
63 ax25_dev->dev = dev;
64 dev_hold(dev);
65 ax25_dev->forward = NULL;
67 ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
68 ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
69 ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF;
70 ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE;
71 ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW;
72 ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW;
73 ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1;
74 ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2;
75 ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3;
76 ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE;
77 ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2;
78 ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN;
79 ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL;
80 ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
82 #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
83 ax25_ds_setup_timer(ax25_dev);
84 #endif
86 spin_lock_bh(&ax25_dev_lock);
87 ax25_dev->next = ax25_dev_list;
88 ax25_dev_list = ax25_dev;
89 spin_unlock_bh(&ax25_dev_lock);
91 ax25_register_dev_sysctl(ax25_dev);
94 void ax25_dev_device_down(struct net_device *dev)
96 ax25_dev *s, *ax25_dev;
98 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
99 return;
101 ax25_unregister_dev_sysctl(ax25_dev);
103 spin_lock_bh(&ax25_dev_lock);
105 #ifdef CONFIG_AX25_DAMA_SLAVE
106 ax25_ds_del_timer(ax25_dev);
107 #endif
110 * Remove any packet forwarding that points to this device.
112 for (s = ax25_dev_list; s != NULL; s = s->next)
113 if (s->forward == dev)
114 s->forward = NULL;
116 if ((s = ax25_dev_list) == ax25_dev) {
117 ax25_dev_list = s->next;
118 spin_unlock_bh(&ax25_dev_lock);
119 dev_put(dev);
120 kfree(ax25_dev);
121 return;
124 while (s != NULL && s->next != NULL) {
125 if (s->next == ax25_dev) {
126 s->next = ax25_dev->next;
127 spin_unlock_bh(&ax25_dev_lock);
128 dev_put(dev);
129 kfree(ax25_dev);
130 return;
133 s = s->next;
135 spin_unlock_bh(&ax25_dev_lock);
136 dev->ax25_ptr = NULL;
139 int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
141 ax25_dev *ax25_dev, *fwd_dev;
143 if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL)
144 return -EINVAL;
146 switch (cmd) {
147 case SIOCAX25ADDFWD:
148 if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL)
149 return -EINVAL;
150 if (ax25_dev->forward != NULL)
151 return -EINVAL;
152 ax25_dev->forward = fwd_dev->dev;
153 break;
155 case SIOCAX25DELFWD:
156 if (ax25_dev->forward == NULL)
157 return -EINVAL;
158 ax25_dev->forward = NULL;
159 break;
161 default:
162 return -EINVAL;
165 return 0;
168 struct net_device *ax25_fwd_dev(struct net_device *dev)
170 ax25_dev *ax25_dev;
172 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
173 return dev;
175 if (ax25_dev->forward == NULL)
176 return dev;
178 return ax25_dev->forward;
182 * Free all memory associated with device structures.
184 void __exit ax25_dev_free(void)
186 ax25_dev *s, *ax25_dev;
188 spin_lock_bh(&ax25_dev_lock);
189 ax25_dev = ax25_dev_list;
190 while (ax25_dev != NULL) {
191 s = ax25_dev;
192 dev_put(ax25_dev->dev);
193 ax25_dev = ax25_dev->next;
194 kfree(s);
196 ax25_dev_list = NULL;
197 spin_unlock_bh(&ax25_dev_lock);