/* * device anycast group decrement */ int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr) { struct ifacaddr6 *aca, *prev_aca; write_lock_bh(&idev->lock); prev_aca = NULL; for (aca = idev->ac_list; aca; aca = aca->aca_next) { if (ipv6_addr_equal(&aca->aca_addr, addr)) break; prev_aca = aca; } if (!aca) { write_unlock_bh(&idev->lock); return -ENOENT; } if (--aca->aca_users > 0) { write_unlock_bh(&idev->lock); return 0; } if (prev_aca) prev_aca->aca_next = aca->aca_next; else idev->ac_list = aca->aca_next; write_unlock_bh(&idev->lock); addrconf_leave_solict(idev, &aca->aca_addr); dst_hold(&aca->aca_rt->u.dst); if (ip6_del_rt(aca->aca_rt)) dst_free(&aca->aca_rt->u.dst); else dst_release(&aca->aca_rt->u.dst); aca_put(aca); return 0; }
/* * device anycast group decrement */ int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr) { struct ifacaddr6 *aca, *prev_aca; ASSERT_RTNL(); write_lock_bh(&idev->lock); prev_aca = NULL; for (aca = idev->ac_list; aca; aca = aca->aca_next) { if (ipv6_addr_equal(&aca->aca_addr, addr)) break; prev_aca = aca; } if (!aca) { write_unlock_bh(&idev->lock); return -ENOENT; } if (--aca->aca_users > 0) { write_unlock_bh(&idev->lock); return 0; } if (prev_aca) prev_aca->aca_next = aca->aca_next; else idev->ac_list = aca->aca_next; write_unlock_bh(&idev->lock); addrconf_leave_solict(idev, &aca->aca_addr); ip6_del_rt(dev_net(idev->dev), aca->aca_rt); aca_put(aca); return 0; }
/* * device anycast group inc (add if not found) */ int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr) { struct ifacaddr6 *aca; struct fib6_info *f6i; struct net *net; int err; ASSERT_RTNL(); write_lock_bh(&idev->lock); if (idev->dead) { err = -ENODEV; goto out; } for (aca = idev->ac_list; aca; aca = aca->aca_next) { if (ipv6_addr_equal(&aca->aca_addr, addr)) { aca->aca_users++; err = 0; goto out; } } net = dev_net(idev->dev); f6i = addrconf_f6i_alloc(net, idev, addr, true, GFP_ATOMIC); if (IS_ERR(f6i)) { err = PTR_ERR(f6i); goto out; } aca = aca_alloc(f6i, addr); if (!aca) { fib6_info_release(f6i); err = -ENOMEM; goto out; } aca->aca_next = idev->ac_list; idev->ac_list = aca; /* Hold this for addrconf_join_solict() below before we unlock, * it is already exposed via idev->ac_list. */ aca_get(aca); write_unlock_bh(&idev->lock); ip6_ins_rt(net, f6i); addrconf_join_solict(idev->dev, &aca->aca_addr); aca_put(aca); return 0; out: write_unlock_bh(&idev->lock); return err; }
/* * device anycast group inc (add if not found) */ int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr) { struct ifacaddr6 *aca; struct rt6_info *rt; int err; ASSERT_RTNL(); write_lock_bh(&idev->lock); if (idev->dead) { err = -ENODEV; goto out; } for (aca = idev->ac_list; aca; aca = aca->aca_next) { if (ipv6_addr_equal(&aca->aca_addr, addr)) { aca->aca_users++; err = 0; goto out; } } rt = addrconf_dst_alloc(idev, addr, true); if (IS_ERR(rt)) { err = PTR_ERR(rt); goto out; } aca = aca_alloc(rt, addr); if (!aca) { ip6_rt_put(rt); err = -ENOMEM; goto out; } aca->aca_next = idev->ac_list; idev->ac_list = aca; /* Hold this for addrconf_join_solict() below before we unlock, * it is already exposed via idev->ac_list. */ aca_get(aca); write_unlock_bh(&idev->lock); ip6_ins_rt(rt); addrconf_join_solict(idev->dev, &aca->aca_addr); aca_put(aca); return 0; out: write_unlock_bh(&idev->lock); return err; }
void ipv6_ac_destroy_dev(struct inet6_dev *idev) { struct ifacaddr6 *aca; write_lock_bh(&idev->lock); while ((aca = idev->ac_list) != NULL) { idev->ac_list = aca->aca_next; write_unlock_bh(&idev->lock); addrconf_leave_solict(idev, &aca->aca_addr); ip6_del_rt(dev_net(idev->dev), aca->aca_rt); aca_put(aca); write_lock_bh(&idev->lock); } write_unlock_bh(&idev->lock); }
/* * device anycast group inc (add if not found) */ int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr) { struct ifacaddr6 *aca; struct inet6_dev *idev; struct rt6_info *rt; int err; idev = in6_dev_get(dev); if (idev == NULL) return -EINVAL; write_lock_bh(&idev->lock); if (idev->dead) { err = -ENODEV; goto out; } for (aca = idev->ac_list; aca; aca = aca->aca_next) { if (ipv6_addr_equal(&aca->aca_addr, addr)) { aca->aca_users++; err = 0; goto out; } } /* * not found: create a new one. */ aca = kzalloc(sizeof(struct ifacaddr6), GFP_ATOMIC); if (aca == NULL) { err = -ENOMEM; goto out; } rt = addrconf_dst_alloc(idev, addr, 1); if (IS_ERR(rt)) { kfree(aca); err = PTR_ERR(rt); goto out; } ipv6_addr_copy(&aca->aca_addr, addr); aca->aca_idev = idev; aca->aca_rt = rt; aca->aca_users = 1; /* aca_tstamp should be updated upon changes */ aca->aca_cstamp = aca->aca_tstamp = jiffies; atomic_set(&aca->aca_refcnt, 2); spin_lock_init(&aca->aca_lock); aca->aca_next = idev->ac_list; idev->ac_list = aca; write_unlock_bh(&idev->lock); dst_hold(&rt->u.dst); if (ip6_ins_rt(rt)) dst_release(&rt->u.dst); addrconf_join_solict(dev, &aca->aca_addr); aca_put(aca); return 0; out: write_unlock_bh(&idev->lock); in6_dev_put(idev); return err; }