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-rw-r--r--net/core/dev_mcast.c232
1 files changed, 0 insertions, 232 deletions
diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
deleted file mode 100644
index 3dc295beb483..000000000000
--- a/net/core/dev_mcast.c
+++ /dev/null
@@ -1,232 +0,0 @@
1/*
2 * Linux NET3: Multicast List maintenance.
3 *
4 * Authors:
5 * Tim Kordas <tjk@nostromo.eeap.cwru.edu>
6 * Richard Underwood <richard@wuzz.demon.co.uk>
7 *
8 * Stir fried together from the IP multicast and CAP patches above
9 * Alan Cox <alan@lxorguk.ukuu.org.uk>
10 *
11 * Fixes:
12 * Alan Cox : Update the device on a real delete
13 * rather than any time but...
14 * Alan Cox : IFF_ALLMULTI support.
15 * Alan Cox : New format set_multicast_list() calls.
16 * Gleb Natapov : Remove dev_mc_lock.
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 */
23
24#include <linux/module.h>
25#include <asm/uaccess.h>
26#include <asm/system.h>
27#include <linux/bitops.h>
28#include <linux/types.h>
29#include <linux/kernel.h>
30#include <linux/string.h>
31#include <linux/mm.h>
32#include <linux/socket.h>
33#include <linux/sockios.h>
34#include <linux/in.h>
35#include <linux/errno.h>
36#include <linux/interrupt.h>
37#include <linux/if_ether.h>
38#include <linux/inet.h>
39#include <linux/netdevice.h>
40#include <linux/etherdevice.h>
41#include <linux/proc_fs.h>
42#include <linux/seq_file.h>
43#include <linux/init.h>
44#include <net/net_namespace.h>
45#include <net/ip.h>
46#include <net/route.h>
47#include <linux/skbuff.h>
48#include <net/sock.h>
49#include <net/arp.h>
50
51
52/*
53 * Device multicast list maintenance.
54 *
55 * This is used both by IP and by the user level maintenance functions.
56 * Unlike BSD we maintain a usage count on a given multicast address so
57 * that a casual user application can add/delete multicasts used by
58 * protocols without doing damage to the protocols when it deletes the
59 * entries. It also helps IP as it tracks overlapping maps.
60 *
61 * Device mc lists are changed by bh at least if IPv6 is enabled,
62 * so that it must be bh protected.
63 *
64 * We block accesses to device mc filters with netif_tx_lock.
65 */
66
67/*
68 * Delete a device level multicast
69 */
70
71int dev_mc_delete(struct net_device *dev, void *addr, int alen, int glbl)
72{
73 int err;
74
75 netif_addr_lock_bh(dev);
76 err = __dev_addr_delete(&dev->mc_list, &dev->mc_count,
77 addr, alen, glbl);
78 if (!err) {
79 /*
80 * We have altered the list, so the card
81 * loaded filter is now wrong. Fix it
82 */
83
84 __dev_set_rx_mode(dev);
85 }
86 netif_addr_unlock_bh(dev);
87 return err;
88}
89
90/*
91 * Add a device level multicast
92 */
93
94int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl)
95{
96 int err;
97
98 netif_addr_lock_bh(dev);
99 if (alen != dev->addr_len)
100 err = -EINVAL;
101 else
102 err = __dev_addr_add(&dev->mc_list, &dev->mc_count, addr, alen, glbl);
103 if (!err)
104 __dev_set_rx_mode(dev);
105 netif_addr_unlock_bh(dev);
106 return err;
107}
108
109/**
110 * dev_mc_sync - Synchronize device's multicast list to another device
111 * @to: destination device
112 * @from: source device
113 *
114 * Add newly added addresses to the destination device and release
115 * addresses that have no users left. The source device must be
116 * locked by netif_tx_lock_bh.
117 *
118 * This function is intended to be called from the dev->set_multicast_list
119 * or dev->set_rx_mode function of layered software devices.
120 */
121int dev_mc_sync(struct net_device *to, struct net_device *from)
122{
123 int err = 0;
124
125 netif_addr_lock_bh(to);
126 err = __dev_addr_sync(&to->mc_list, &to->mc_count,
127 &from->mc_list, &from->mc_count);
128 if (!err)
129 __dev_set_rx_mode(to);
130 netif_addr_unlock_bh(to);
131
132 return err;
133}
134EXPORT_SYMBOL(dev_mc_sync);
135
136
137/**
138 * dev_mc_unsync - Remove synchronized addresses from the destination
139 * device
140 * @to: destination device
141 * @from: source device
142 *
143 * Remove all addresses that were added to the destination device by
144 * dev_mc_sync(). This function is intended to be called from the
145 * dev->stop function of layered software devices.
146 */
147void dev_mc_unsync(struct net_device *to, struct net_device *from)
148{
149 netif_addr_lock_bh(from);
150 netif_addr_lock(to);
151
152 __dev_addr_unsync(&to->mc_list, &to->mc_count,
153 &from->mc_list, &from->mc_count);
154 __dev_set_rx_mode(to);
155
156 netif_addr_unlock(to);
157 netif_addr_unlock_bh(from);
158}
159EXPORT_SYMBOL(dev_mc_unsync);
160
161#ifdef CONFIG_PROC_FS
162static int dev_mc_seq_show(struct seq_file *seq, void *v)
163{
164 struct dev_addr_list *m;
165 struct net_device *dev = v;
166
167 if (v == SEQ_START_TOKEN)
168 return 0;
169
170 netif_addr_lock_bh(dev);
171 for (m = dev->mc_list; m; m = m->next) {
172 int i;
173
174 seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex,
175 dev->name, m->dmi_users, m->dmi_gusers);
176
177 for (i = 0; i < m->dmi_addrlen; i++)
178 seq_printf(seq, "%02x", m->dmi_addr[i]);
179
180 seq_putc(seq, '\n');
181 }
182 netif_addr_unlock_bh(dev);
183 return 0;
184}
185
186static const struct seq_operations dev_mc_seq_ops = {
187 .start = dev_seq_start,
188 .next = dev_seq_next,
189 .stop = dev_seq_stop,
190 .show = dev_mc_seq_show,
191};
192
193static int dev_mc_seq_open(struct inode *inode, struct file *file)
194{
195 return seq_open_net(inode, file, &dev_mc_seq_ops,
196 sizeof(struct seq_net_private));
197}
198
199static const struct file_operations dev_mc_seq_fops = {
200 .owner = THIS_MODULE,
201 .open = dev_mc_seq_open,
202 .read = seq_read,
203 .llseek = seq_lseek,
204 .release = seq_release_net,
205};
206
207#endif
208
209static int __net_init dev_mc_net_init(struct net *net)
210{
211 if (!proc_net_fops_create(net, "dev_mcast", 0, &dev_mc_seq_fops))
212 return -ENOMEM;
213 return 0;
214}
215
216static void __net_exit dev_mc_net_exit(struct net *net)
217{
218 proc_net_remove(net, "dev_mcast");
219}
220
221static struct pernet_operations __net_initdata dev_mc_net_ops = {
222 .init = dev_mc_net_init,
223 .exit = dev_mc_net_exit,
224};
225
226void __init dev_mcast_init(void)
227{
228 register_pernet_subsys(&dev_mc_net_ops);
229}
230
231EXPORT_SYMBOL(dev_mc_add);
232EXPORT_SYMBOL(dev_mc_delete);
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