Release 4.11 net/ax25/ax25_dev.c

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
 */
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/slab.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/spinlock.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/init.h>


ax25_dev *ax25_dev_list;

DEFINE_SPINLOCK(ax25_dev_lock);



ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
{
	ax25_dev *ax25_dev, *res = NULL;

	spin_lock_bh(&ax25_dev_lock);
	for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
		if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) {
			res = ax25_dev;
		}
	spin_unlock_bh(&ax25_dev_lock);

	return res;
}

Contributors
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Linus Torvalds (pre-git)
52
69.33%
1
33.33%
Ralf Bächle
23
30.67%
2
66.67%
Total
75
100.00%
3
100.00%

/*
 *      This is called when an interface is brought up. These are
 *      reasonable defaults.
 */


void ax25_dev_device_up(struct net_device *dev)
{
	ax25_dev *ax25_dev;

	if ((ax25_dev = kzalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) {
		printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n");
		return;
	}

	dev->ax25_ptr     = ax25_dev;
	ax25_dev->dev     = dev;
	dev_hold(dev);
	ax25_dev->forward = NULL;

	ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
	ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
	ax25_dev->values[AX25_VALUES_BACKOFF]   = AX25_DEF_BACKOFF;
	ax25_dev->values[AX25_VALUES_CONMODE]   = AX25_DEF_CONMODE;
	ax25_dev->values[AX25_VALUES_WINDOW]    = AX25_DEF_WINDOW;
	ax25_dev->values[AX25_VALUES_EWINDOW]   = AX25_DEF_EWINDOW;
	ax25_dev->values[AX25_VALUES_T1]        = AX25_DEF_T1;
	ax25_dev->values[AX25_VALUES_T2]        = AX25_DEF_T2;
	ax25_dev->values[AX25_VALUES_T3]        = AX25_DEF_T3;
	ax25_dev->values[AX25_VALUES_IDLE]	= AX25_DEF_IDLE;
	ax25_dev->values[AX25_VALUES_N2]        = AX25_DEF_N2;
	ax25_dev->values[AX25_VALUES_PACLEN]	= AX25_DEF_PACLEN;
	ax25_dev->values[AX25_VALUES_PROTOCOL]  = AX25_DEF_PROTOCOL;
	ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;

#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
	ax25_ds_setup_timer(ax25_dev);
#endif

	spin_lock_bh(&ax25_dev_lock);
	ax25_dev->next = ax25_dev_list;
	ax25_dev_list  = ax25_dev;
	spin_unlock_bh(&ax25_dev_lock);

	ax25_register_dev_sysctl(ax25_dev);
}

Contributors
Person
Tokens
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Commits
CommitProp
Linus Torvalds (pre-git)
196
83.05%
4
33.33%
Andrew Morton
17
7.20%
1
8.33%
Ralf Bächle
7
2.97%
3
25.00%
Steven Whitehouse
6
2.54%
1
8.33%
Stephen Hemminger
5
2.12%
1
8.33%
Eric W. Biedermann
4
1.69%
1
8.33%
Jarek Poplawski
1
0.42%
1
8.33%
Total
236
100.00%
12
100.00%



void ax25_dev_device_down(struct net_device *dev)
{
	ax25_dev *s, *ax25_dev;

	if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
		return;

	ax25_unregister_dev_sysctl(ax25_dev);

	spin_lock_bh(&ax25_dev_lock);

#ifdef CONFIG_AX25_DAMA_SLAVE
	ax25_ds_del_timer(ax25_dev);
#endif

	/*
         *      Remove any packet forwarding that points to this device.
         */
	for (s = ax25_dev_list; s != NULL; s = s->next)
		if (s->forward == dev)
			s->forward = NULL;

	if ((s = ax25_dev_list) == ax25_dev) {
		ax25_dev_list = s->next;
		spin_unlock_bh(&ax25_dev_lock);
		dev_put(dev);
		kfree(ax25_dev);
		return;
	}

	while (s != NULL && s->next != NULL) {
		if (s->next == ax25_dev) {
			s->next = ax25_dev->next;
			spin_unlock_bh(&ax25_dev_lock);
			dev_put(dev);
			kfree(ax25_dev);
			return;
		}

		s = s->next;
	}
	spin_unlock_bh(&ax25_dev_lock);
	dev->ax25_ptr = NULL;
}

Contributors
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Linus Torvalds (pre-git)
153
82.70%
4
44.44%
Ralf Bächle
12
6.49%
2
22.22%
Stephen Hemminger
10
5.41%
1
11.11%
Steven Whitehouse
6
3.24%
1
11.11%
Eric W. Biedermann
4
2.16%
1
11.11%
Total
185
100.00%
9
100.00%



int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
{
	ax25_dev *ax25_dev, *fwd_dev;

	if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL)
		return -EINVAL;

	switch (cmd) {
	case SIOCAX25ADDFWD:
		if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL)
			return -EINVAL;
		if (ax25_dev->forward != NULL)
			return -EINVAL;
		ax25_dev->forward = fwd_dev->dev;
		break;

	case SIOCAX25DELFWD:
		if (ax25_dev->forward == NULL)
			return -EINVAL;
		ax25_dev->forward = NULL;
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

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Linus Torvalds (pre-git)
121
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1
100.00%
Total
121
100.00%
1
100.00%



struct net_device *ax25_fwd_dev(struct net_device *dev)
{
	ax25_dev *ax25_dev;

	if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
		return dev;

	if (ax25_dev->forward == NULL)
		return dev;

	return ax25_dev->forward;
}

Contributors
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CommitProp
Linus Torvalds (pre-git)
48
100.00%
2
100.00%
Total
48
100.00%
2
100.00%

/*
 *      Free all memory associated with device structures.
 */


void __exit ax25_dev_free(void)
{
	ax25_dev *s, *ax25_dev;

	spin_lock_bh(&ax25_dev_lock);
	ax25_dev = ax25_dev_list;
	while (ax25_dev != NULL) {
		s        = ax25_dev;
		dev_put(ax25_dev->dev);
		ax25_dev = ax25_dev->next;
		kfree(s);
	}
	ax25_dev_list = NULL;
	spin_unlock_bh(&ax25_dev_lock);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
38
58.46%
3
50.00%
Ralf Bächle
20
30.77%
2
33.33%
Stephen Hemminger
7
10.77%
1
16.67%
Total
65
100.00%
6
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
673
83.29%
5
29.41%
Ralf Bächle
67
8.29%
4
23.53%
Stephen Hemminger
22
2.72%
1
5.88%
Andrew Morton
17
2.10%
1
5.88%
Steven Whitehouse
12
1.49%
1
5.88%
Eric W. Biedermann
8
0.99%
1
5.88%
Thomas Gleixner
4
0.50%
1
5.88%
Tejun Heo
3
0.37%
1
5.88%
Linus Torvalds
1
0.12%
1
5.88%
Jarek Poplawski
1
0.12%
1
5.88%
Total
808
100.00%
17
100.00%
Directory: net/ax25

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