/* * 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; }