diff options
Diffstat (limited to 'net/core/dev_mcast.c')
-rw-r--r-- | net/core/dev_mcast.c | 232 |
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 3dc295beb48..00000000000 --- 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 | |||
71 | int 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 | |||
94 | int 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 | */ | ||
121 | int 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 | } | ||
134 | EXPORT_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 | */ | ||
147 | void 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 | } | ||
159 | EXPORT_SYMBOL(dev_mc_unsync); | ||
160 | |||
161 | #ifdef CONFIG_PROC_FS | ||
162 | static 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 | |||
186 | static 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 | |||
193 | static 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 | |||
199 | static 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 | |||
209 | static 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 | |||
216 | static void __net_exit dev_mc_net_exit(struct net *net) | ||
217 | { | ||
218 | proc_net_remove(net, "dev_mcast"); | ||
219 | } | ||
220 | |||
221 | static struct pernet_operations __net_initdata dev_mc_net_ops = { | ||
222 | .init = dev_mc_net_init, | ||
223 | .exit = dev_mc_net_exit, | ||
224 | }; | ||
225 | |||
226 | void __init dev_mcast_init(void) | ||
227 | { | ||
228 | register_pernet_subsys(&dev_mc_net_ops); | ||
229 | } | ||
230 | |||
231 | EXPORT_SYMBOL(dev_mc_add); | ||
232 | EXPORT_SYMBOL(dev_mc_delete); | ||