From 56addd6eeeb4e11f5a0af7093ca078e0f29140e0 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Sat, 14 Jul 2007 18:53:28 -0700 Subject: [PATCH] [VLAN]: Use multicast list synchronization helpers Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- include/linux/if_vlan.h | 5 -- net/8021q/vlan_dev.c | 131 +--------------------------------------- 2 files changed, 2 insertions(+), 134 deletions(-) diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 7f71df4c95..f8443fdb12 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -127,11 +127,6 @@ struct vlan_dev_info { * like DHCP that use packet-filtering and don't understand * 802.1Q */ - struct dev_mc_list *old_mc_list; /* old multi-cast list for the VLAN interface.. - * we save this so we can tell what changes were - * made, in order to feed the right changes down - * to the real hardware... - */ struct net_device *real_dev; /* the underlying device/interface */ unsigned char real_dev_addr[ETH_ALEN]; struct proc_dir_entry *dent; /* Holds the proc data */ diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index dec7e62b2e..4d2aa4dd42 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -612,90 +612,6 @@ void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result) *result = VLAN_DEV_INFO(dev)->vlan_id; } -static inline int vlan_dmi_equals(struct dev_mc_list *dmi1, - struct dev_mc_list *dmi2) -{ - return ((dmi1->dmi_addrlen == dmi2->dmi_addrlen) && - (memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0)); -} - -/** dmi is a single entry into a dev_mc_list, a single node. mc_list is - * an entire list, and we'll iterate through it. - */ -static int vlan_should_add_mc(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) -{ - struct dev_mc_list *idmi; - - for (idmi = mc_list; idmi != NULL; ) { - if (vlan_dmi_equals(dmi, idmi)) { - if (dmi->dmi_users > idmi->dmi_users) - return 1; - else - return 0; - } else { - idmi = idmi->next; - } - } - - return 1; -} - -static inline void vlan_destroy_mc_list(struct dev_mc_list *mc_list) -{ - struct dev_mc_list *dmi = mc_list; - struct dev_mc_list *next; - - while(dmi) { - next = dmi->next; - kfree(dmi); - dmi = next; - } -} - -static void vlan_copy_mc_list(struct dev_mc_list *mc_list, struct vlan_dev_info *vlan_info) -{ - struct dev_mc_list *dmi, *new_dmi; - - vlan_destroy_mc_list(vlan_info->old_mc_list); - vlan_info->old_mc_list = NULL; - - for (dmi = mc_list; dmi != NULL; dmi = dmi->next) { - new_dmi = kmalloc(sizeof(*new_dmi), GFP_ATOMIC); - if (new_dmi == NULL) { - printk(KERN_ERR "vlan: cannot allocate memory. " - "Multicast may not work properly from now.\n"); - return; - } - - /* Copy whole structure, then make new 'next' pointer */ - *new_dmi = *dmi; - new_dmi->next = vlan_info->old_mc_list; - vlan_info->old_mc_list = new_dmi; - } -} - -static void vlan_flush_mc_list(struct net_device *dev) -{ - struct dev_mc_list *dmi = dev->mc_list; - - while (dmi) { - printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from vlan interface\n", - dev->name, - dmi->dmi_addr[0], - dmi->dmi_addr[1], - dmi->dmi_addr[2], - dmi->dmi_addr[3], - dmi->dmi_addr[4], - dmi->dmi_addr[5]); - dev_mc_delete(dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); - dmi = dev->mc_list; - } - - /* dev->mc_list is NULL by the time we get here. */ - vlan_destroy_mc_list(VLAN_DEV_INFO(dev)->old_mc_list); - VLAN_DEV_INFO(dev)->old_mc_list = NULL; -} - int vlan_dev_open(struct net_device *dev) { struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); @@ -724,8 +640,7 @@ int vlan_dev_stop(struct net_device *dev) { struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev; - vlan_flush_mc_list(dev); - + dev_mc_unsync(real_dev, dev); if (dev->flags & IFF_ALLMULTI) dev_set_allmulti(real_dev, -1); if (dev->flags & IFF_PROMISC) @@ -777,47 +692,5 @@ void vlan_change_rx_flags(struct net_device *dev, int change) /** Taken from Gleb + Lennert's VLAN code, and modified... */ void vlan_dev_set_multicast_list(struct net_device *vlan_dev) { - struct dev_mc_list *dmi; - struct net_device *real_dev; - - if (vlan_dev && (vlan_dev->priv_flags & IFF_802_1Q_VLAN)) { - /* Then it's a real vlan device, as far as we can tell.. */ - real_dev = VLAN_DEV_INFO(vlan_dev)->real_dev; - - /* looking for addresses to add to master's list */ - for (dmi = vlan_dev->mc_list; dmi != NULL; dmi = dmi->next) { - if (vlan_should_add_mc(dmi, VLAN_DEV_INFO(vlan_dev)->old_mc_list)) { - dev_mc_add(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); - printk(KERN_DEBUG "%s: add %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address to master interface\n", - vlan_dev->name, - dmi->dmi_addr[0], - dmi->dmi_addr[1], - dmi->dmi_addr[2], - dmi->dmi_addr[3], - dmi->dmi_addr[4], - dmi->dmi_addr[5]); - } - } - - /* looking for addresses to delete from master's list */ - for (dmi = VLAN_DEV_INFO(vlan_dev)->old_mc_list; dmi != NULL; dmi = dmi->next) { - if (vlan_should_add_mc(dmi, vlan_dev->mc_list)) { - /* if we think we should add it to the new list, then we should really - * delete it from the real list on the underlying device. - */ - dev_mc_delete(real_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); - printk(KERN_DEBUG "%s: del %.2x:%.2x:%.2x:%.2x:%.2x:%.2x mcast address from master interface\n", - vlan_dev->name, - dmi->dmi_addr[0], - dmi->dmi_addr[1], - dmi->dmi_addr[2], - dmi->dmi_addr[3], - dmi->dmi_addr[4], - dmi->dmi_addr[5]); - } - } - - /* save multicast list */ - vlan_copy_mc_list(vlan_dev->mc_list, VLAN_DEV_INFO(vlan_dev)); - } + dev_mc_sync(VLAN_DEV_INFO(vlan_dev)->real_dev, vlan_dev); } -- 2.39.5