diff options
Diffstat (limited to 'net/core/dev_mcast.c')
| -rw-r--r-- | net/core/dev_mcast.c | 299 |
1 files changed, 0 insertions, 299 deletions
diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c deleted file mode 100644 index db098ff3cd6..00000000000 --- a/net/core/dev_mcast.c +++ /dev/null @@ -1,299 +0,0 @@ -/* - * Linux NET3: Multicast List maintenance. - * - * Authors: - * Tim Kordas <tjk@nostromo.eeap.cwru.edu> - * Richard Underwood <richard@wuzz.demon.co.uk> - * - * Stir fried together from the IP multicast and CAP patches above - * Alan Cox <Alan.Cox@linux.org> - * - * Fixes: - * Alan Cox : Update the device on a real delete - * rather than any time but... - * Alan Cox : IFF_ALLMULTI support. - * Alan Cox : New format set_multicast_list() calls. - * Gleb Natapov : Remove dev_mc_lock. - * - * 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. - */ - -#include <linux/config.h> -#include <linux/module.h> -#include <asm/uaccess.h> -#include <asm/system.h> -#include <linux/bitops.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/socket.h> -#include <linux/sockios.h> -#include <linux/in.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/if_ether.h> -#include <linux/inet.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/init.h> -#include <net/ip.h> -#include <net/route.h> -#include <linux/skbuff.h> -#include <net/sock.h> -#include <net/arp.h> - - -/* - * Device multicast list maintenance. - * - * This is used both by IP and by the user level maintenance functions. - * Unlike BSD we maintain a usage count on a given multicast address so - * that a casual user application can add/delete multicasts used by - * protocols without doing damage to the protocols when it deletes the - * entries. It also helps IP as it tracks overlapping maps. - * - * Device mc lists are changed by bh at least if IPv6 is enabled, - * so that it must be bh protected. - * - * We block accesses to device mc filters with dev->xmit_lock. - */ - -/* - * Update the multicast list into the physical NIC controller. - */ - -static void __dev_mc_upload(struct net_device *dev) -{ - /* Don't do anything till we up the interface - * [dev_open will call this function so the list will - * stay sane] - */ - - if (!(dev->flags&IFF_UP)) - return; - - /* - * Devices with no set multicast or which have been - * detached don't get set. - */ - - if (dev->set_multicast_list == NULL || - !netif_device_present(dev)) - return; - - dev->set_multicast_list(dev); -} - -void dev_mc_upload(struct net_device *dev) -{ - spin_lock_bh(&dev->xmit_lock); - __dev_mc_upload(dev); - spin_unlock_bh(&dev->xmit_lock); -} - -/* - * Delete a device level multicast - */ - -int dev_mc_delete(struct net_device *dev, void *addr, int alen, int glbl) -{ - int err = 0; - struct dev_mc_list *dmi, **dmip; - - spin_lock_bh(&dev->xmit_lock); - - for (dmip = &dev->mc_list; (dmi = *dmip) != NULL; dmip = &dmi->next) { - /* - * Find the entry we want to delete. The device could - * have variable length entries so check these too. - */ - if (memcmp(dmi->dmi_addr, addr, dmi->dmi_addrlen) == 0 && - alen == dmi->dmi_addrlen) { - if (glbl) { - int old_glbl = dmi->dmi_gusers; - dmi->dmi_gusers = 0; - if (old_glbl == 0) - break; - } - if (--dmi->dmi_users) - goto done; - - /* - * Last user. So delete the entry. - */ - *dmip = dmi->next; - dev->mc_count--; - - kfree(dmi); - - /* - * We have altered the list, so the card - * loaded filter is now wrong. Fix it - */ - __dev_mc_upload(dev); - - spin_unlock_bh(&dev->xmit_lock); - return 0; - } - } - err = -ENOENT; -done: - spin_unlock_bh(&dev->xmit_lock); - return err; -} - -/* - * Add a device level multicast - */ - -int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl) -{ - int err = 0; - struct dev_mc_list *dmi, *dmi1; - - dmi1 = (struct dev_mc_list *)kmalloc(sizeof(*dmi), GFP_ATOMIC); - - spin_lock_bh(&dev->xmit_lock); - for (dmi = dev->mc_list; dmi != NULL; dmi = dmi->next) { - if (memcmp(dmi->dmi_addr, addr, dmi->dmi_addrlen) == 0 && - dmi->dmi_addrlen == alen) { - if (glbl) { - int old_glbl = dmi->dmi_gusers; - dmi->dmi_gusers = 1; - if (old_glbl) - goto done; - } - dmi->dmi_users++; - goto done; - } - } - - if ((dmi = dmi1) == NULL) { - spin_unlock_bh(&dev->xmit_lock); - return -ENOMEM; - } - memcpy(dmi->dmi_addr, addr, alen); - dmi->dmi_addrlen = alen; - dmi->next = dev->mc_list; - dmi->dmi_users = 1; - dmi->dmi_gusers = glbl ? 1 : 0; - dev->mc_list = dmi; - dev->mc_count++; - - __dev_mc_upload(dev); - - spin_unlock_bh(&dev->xmit_lock); - return 0; - -done: - spin_unlock_bh(&dev->xmit_lock); - if (dmi1) - kfree(dmi1); - return err; -} - -/* - * Discard multicast list when a device is downed - */ - -void dev_mc_discard(struct net_device *dev) -{ - spin_lock_bh(&dev->xmit_lock); - - while (dev->mc_list != NULL) { - struct dev_mc_list *tmp = dev->mc_list; - dev->mc_list = tmp->next; - if (tmp->dmi_users > tmp->dmi_gusers) - printk("dev_mc_discard: multicast leakage! dmi_users=%d\n", tmp->dmi_users); - kfree(tmp); - } - dev->mc_count = 0; - - spin_unlock_bh(&dev->xmit_lock); -} - -#ifdef CONFIG_PROC_FS -static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos) -{ - struct net_device *dev; - loff_t off = 0; - - read_lock(&dev_base_lock); - for (dev = dev_base; dev; dev = dev->next) { - if (off++ == *pos) - return dev; - } - return NULL; -} - -static void *dev_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) -{ - struct net_device *dev = v; - ++*pos; - return dev->next; -} - -static void dev_mc_seq_stop(struct seq_file *seq, void *v) -{ - read_unlock(&dev_base_lock); -} - - -static int dev_mc_seq_show(struct seq_file *seq, void *v) -{ - struct dev_mc_list *m; - struct net_device *dev = v; - - spin_lock_bh(&dev->xmit_lock); - for (m = dev->mc_list; m; m = m->next) { - int i; - - seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex, - dev->name, m->dmi_users, m->dmi_gusers); - - for (i = 0; i < m->dmi_addrlen; i++) - seq_printf(seq, "%02x", m->dmi_addr[i]); - - seq_putc(seq, '\n'); - } - spin_unlock_bh(&dev->xmit_lock); - return 0; -} - -static struct seq_operations dev_mc_seq_ops = { - .start = dev_mc_seq_start, - .next = dev_mc_seq_next, - .stop = dev_mc_seq_stop, - .show = dev_mc_seq_show, -}; - -static int dev_mc_seq_open(struct inode *inode, struct file *file) -{ - return seq_open(file, &dev_mc_seq_ops); -} - -static struct file_operations dev_mc_seq_fops = { - .owner = THIS_MODULE, - .open = dev_mc_seq_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release, -}; - -#endif - -void __init dev_mcast_init(void) -{ - proc_net_fops_create("dev_mcast", 0, &dev_mc_seq_fops); -} - -EXPORT_SYMBOL(dev_mc_add); -EXPORT_SYMBOL(dev_mc_delete); -EXPORT_SYMBOL(dev_mc_upload); |
