/* * device multicast group del */ int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr) { struct inet6_dev *idev; struct ifmcaddr6 *ma, **map; idev = in6_dev_get(dev); if (idev == NULL) return -ENODEV; write_lock_bh(&idev->lock); for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { if (ipv6_addr_cmp(&ma->mca_addr, addr) == 0) { if (--ma->mca_users == 0) { *map = ma->next; write_unlock_bh(&idev->lock); igmp6_group_dropped(ma); ma_put(ma); in6_dev_put(idev); return 0; } write_unlock_bh(&idev->lock); in6_dev_put(idev); return 0; } } write_unlock_bh(&idev->lock); in6_dev_put(idev); return -ENOENT; }
/* * device multicast group inc (add if not found) */ int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr) { struct ifmcaddr6 *mc; struct inet6_dev *idev; idev = in6_dev_get(dev); if (idev == NULL) return -EINVAL; write_lock_bh(&idev->lock); if (idev->dead) { write_unlock_bh(&idev->lock); in6_dev_put(idev); return -ENODEV; } for (mc = idev->mc_list; mc; mc = mc->next) { if (ipv6_addr_cmp(&mc->mca_addr, addr) == 0) { mc->mca_users++; write_unlock_bh(&idev->lock); in6_dev_put(idev); return 0; } } /* * not found: create a new one. */ mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); if (mc == NULL) { write_unlock_bh(&idev->lock); in6_dev_put(idev); return -ENOMEM; } memset(mc, 0, sizeof(struct ifmcaddr6)); mc->mca_timer.function = igmp6_timer_handler; mc->mca_timer.data = (unsigned long) mc; memcpy(&mc->mca_addr, addr, sizeof(struct in6_addr)); mc->idev = idev; mc->mca_users = 1; atomic_set(&mc->mca_refcnt, 2); mc->mca_lock = SPIN_LOCK_UNLOCKED; mc->next = idev->mc_list; idev->mc_list = mc; write_unlock_bh(&idev->lock); igmp6_group_added(mc); ma_put(mc); return 0; }
void igmp6_timer_handler(unsigned long data) { struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); spin_lock(&ma->mca_lock); ma->mca_flags |= MAF_LAST_REPORTER; ma->mca_flags &= ~MAF_TIMER_RUNNING; spin_unlock(&ma->mca_lock); ma_put(ma); }
void ipv6_mc_destroy_dev(struct inet6_dev *idev) { struct ifmcaddr6 *i; write_lock_bh(&idev->lock); while ((i = idev->mc_list) != NULL) { idev->mc_list = i->next; write_unlock_bh(&idev->lock); igmp6_group_dropped(i); ma_put(i); write_lock_bh(&idev->lock); } write_unlock_bh(&idev->lock); }
void igmp6_timer_handler(unsigned long data) { struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; #ifdef CONFIG_IPV6_MLD6_DEBUG char abuf[128]; in6_ntop(&ma->mca_addr, abuf); MDBG3((KERN_DEBUG "igmp6_timer_handler(ma=%p): mca_addr=%s\n", ma, abuf)); #endif igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); spin_lock(&ma->mca_lock); ma->mca_flags |= MAF_LAST_REPORTER; ma->mca_flags &= ~MAF_TIMER_RUNNING; spin_unlock(&ma->mca_lock); ma_put(ma); }
/* * device multicast group del */ int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr) { struct inet6_dev *idev; struct ifmcaddr6 *ma, **map; #ifdef CONFIG_IPV6_MLD6_DEBUG char abuf[128]; in6_ntop(addr, abuf); MDBG3((KERN_DEBUG "ipv6_dev_mc_dec(dev=%p(%s), addr=%s)\n", dev, dev->name ? dev->name : "<null>", abuf)); #endif idev = in6_dev_get(dev); if (idev == NULL) return -ENODEV; write_lock_bh(&idev->lock); for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { if (ipv6_addr_cmp(&ma->mca_addr, addr) == 0) { if (--ma->mca_users == 0) { *map = ma->next; write_unlock_bh(&idev->lock); igmp6_group_dropped(ma); ma_put(ma); in6_dev_put(idev); return 0; } write_unlock_bh(&idev->lock); in6_dev_put(idev); return 0; } } write_unlock_bh(&idev->lock); in6_dev_put(idev); return -ENOENT; }
void ipv6_mc_destroy_dev(struct inet6_dev *idev) { struct ifmcaddr6 *i; struct in6_addr maddr; MDBG3((KERN_DEBUG "ipv6_mc_destroy_dev(idev=%p)\n", idev)); /* Delete all-nodes address. */ ipv6_addr_all_nodes(&maddr); ipv6_dev_mc_dec(idev->dev, &maddr); write_lock_bh(&idev->lock); while ((i = idev->mc_list) != NULL) { idev->mc_list = i->next; write_unlock_bh(&idev->lock); igmp6_group_dropped(i); ma_put(i); write_lock_bh(&idev->lock); } write_unlock_bh(&idev->lock); }
/* * device multicast group inc (add if not found) */ int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr) { struct ifmcaddr6 *mc; struct inet6_dev *idev; #ifdef CONFIG_IPV6_MLD6_DEBUG char abuf[128]; in6_ntop(addr, abuf); MDBG3((KERN_DEBUG "ipv6_dev_mc_inc(dev=%p(%s), addr=%s)\n", dev, dev->name ? dev->name :"<null>", abuf)); #endif idev = in6_dev_get(dev); if (idev == NULL) return -EINVAL; write_lock_bh(&idev->lock); if (idev->dead) { write_unlock_bh(&idev->lock); in6_dev_put(idev); return -ENODEV; } for (mc = idev->mc_list; mc; mc = mc->next) { if (ipv6_addr_cmp(&mc->mca_addr, addr) == 0) { mc->mca_users++; write_unlock_bh(&idev->lock); in6_dev_put(idev); return 0; } } /* * not found: create a new one. */ mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); if (mc == NULL) { write_unlock_bh(&idev->lock); in6_dev_put(idev); return -ENOMEM; } memset(mc, 0, sizeof(struct ifmcaddr6)); mc->mca_timer.function = igmp6_timer_handler; mc->mca_timer.data = (unsigned long) mc; ipv6_addr_copy(&mc->mca_addr, addr); mc->idev = idev; mc->mca_users = 1; atomic_set(&mc->mca_refcnt, 2); mc->mca_lock = SPIN_LOCK_UNLOCKED; mc->next = idev->mc_list; idev->mc_list = mc; write_unlock_bh(&idev->lock); igmp6_group_added(mc); ma_put(mc); return 0; }