diff options
Diffstat (limited to 'net/core/dev_mcast.c')
| -rw-r--r-- | net/core/dev_mcast.c | 206 |
1 files changed, 86 insertions, 120 deletions
diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c index 5a54053386c8..20330c572610 100644 --- a/net/core/dev_mcast.c +++ b/net/core/dev_mcast.c @@ -64,85 +64,24 @@ */ /* - * 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) -{ - netif_tx_lock_bh(dev); - __dev_mc_upload(dev); - netif_tx_unlock_bh(dev); -} - -/* * 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; + int err; netif_tx_lock_bh(dev); - - for (dmip = &dev->mc_list; (dmi = *dmip) != NULL; dmip = &dmi->next) { + err = __dev_addr_delete(&dev->mc_list, &dev->mc_count, + addr, alen, glbl); + if (!err) { /* - * Find the entry we want to delete. The device could - * have variable length entries so check these too. + * We have altered the list, so the card + * loaded filter is now wrong. Fix it */ - 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); - - netif_tx_unlock_bh(dev); - return 0; - } + + __dev_set_rx_mode(dev); } - err = -ENOENT; -done: netif_tx_unlock_bh(dev); return err; } @@ -153,68 +92,96 @@ done: int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl) { - int err = 0; - struct dev_mc_list *dmi, *dmi1; - - dmi1 = kmalloc(sizeof(*dmi), GFP_ATOMIC); + int err; netif_tx_lock_bh(dev); - 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) { - netif_tx_unlock_bh(dev); - 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++; + err = __dev_addr_add(&dev->mc_list, &dev->mc_count, addr, alen, glbl); + if (!err) + __dev_set_rx_mode(dev); + netif_tx_unlock_bh(dev); + return err; +} - __dev_mc_upload(dev); +/** + * dev_mc_sync - Synchronize device's multicast list to another device + * @to: destination device + * @from: source device + * + * Add newly added addresses to the destination device and release + * addresses that have no users left. The source device must be + * locked by netif_tx_lock_bh. + * + * This function is intended to be called from the dev->set_multicast_list + * function of layered software devices. + */ +int dev_mc_sync(struct net_device *to, struct net_device *from) +{ + struct dev_addr_list *da, *next; + int err = 0; - netif_tx_unlock_bh(dev); - return 0; + netif_tx_lock_bh(to); + da = from->mc_list; + while (da != NULL) { + next = da->next; + if (!da->da_synced) { + err = __dev_addr_add(&to->mc_list, &to->mc_count, + da->da_addr, da->da_addrlen, 0); + if (err < 0) + break; + da->da_synced = 1; + da->da_users++; + } else if (da->da_users == 1) { + __dev_addr_delete(&to->mc_list, &to->mc_count, + da->da_addr, da->da_addrlen, 0); + __dev_addr_delete(&from->mc_list, &from->mc_count, + da->da_addr, da->da_addrlen, 0); + } + da = next; + } + if (!err) + __dev_set_rx_mode(to); + netif_tx_unlock_bh(to); -done: - netif_tx_unlock_bh(dev); - kfree(dmi1); return err; } +EXPORT_SYMBOL(dev_mc_sync); -/* - * Discard multicast list when a device is downed - */ -void dev_mc_discard(struct net_device *dev) +/** + * dev_mc_unsync - Remove synchronized addresses from the destination + * device + * @to: destination device + * @from: source device + * + * Remove all addresses that were added to the destination device by + * dev_mc_sync(). This function is intended to be called from the + * dev->stop function of layered software devices. + */ +void dev_mc_unsync(struct net_device *to, struct net_device *from) { - netif_tx_lock_bh(dev); - - 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); + struct dev_addr_list *da, *next; + + netif_tx_lock_bh(from); + netif_tx_lock_bh(to); + + da = from->mc_list; + while (da != NULL) { + next = da->next; + if (!da->da_synced) + continue; + __dev_addr_delete(&to->mc_list, &to->mc_count, + da->da_addr, da->da_addrlen, 0); + da->da_synced = 0; + __dev_addr_delete(&from->mc_list, &from->mc_count, + da->da_addr, da->da_addrlen, 0); + da = next; } - dev->mc_count = 0; + __dev_set_rx_mode(to); - netif_tx_unlock_bh(dev); + netif_tx_unlock_bh(to); + netif_tx_unlock_bh(from); } +EXPORT_SYMBOL(dev_mc_unsync); #ifdef CONFIG_PROC_FS static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos) @@ -244,7 +211,7 @@ static void dev_mc_seq_stop(struct seq_file *seq, void *v) static int dev_mc_seq_show(struct seq_file *seq, void *v) { - struct dev_mc_list *m; + struct dev_addr_list *m; struct net_device *dev = v; netif_tx_lock_bh(dev); @@ -292,4 +259,3 @@ void __init dev_mcast_init(void) EXPORT_SYMBOL(dev_mc_add); EXPORT_SYMBOL(dev_mc_delete); -EXPORT_SYMBOL(dev_mc_upload); |