^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Generic nexthop implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2017-19 Cumulus Networks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2017-19 David Ahern <dsa@cumulusnetworks.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/nexthop.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <net/arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <net/ipv6_stubs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <net/lwtunnel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <net/ndisc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <net/nexthop.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <net/route.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static void remove_nexthop(struct net *net, struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct nl_info *nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define NH_DEV_HASHBITS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define NH_DEV_HASHSIZE (1U << NH_DEV_HASHBITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static const struct nla_policy rtm_nh_policy[NHA_MAX + 1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) [NHA_ID] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) [NHA_GROUP] = { .type = NLA_BINARY },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) [NHA_GROUP_TYPE] = { .type = NLA_U16 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) [NHA_BLACKHOLE] = { .type = NLA_FLAG },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) [NHA_OIF] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) [NHA_GATEWAY] = { .type = NLA_BINARY },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) [NHA_ENCAP_TYPE] = { .type = NLA_U16 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) [NHA_ENCAP] = { .type = NLA_NESTED },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) [NHA_GROUPS] = { .type = NLA_FLAG },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) [NHA_MASTER] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) [NHA_FDB] = { .type = NLA_FLAG },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int call_nexthop_notifiers(struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) enum nexthop_event_type event_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct nexthop *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) err = blocking_notifier_call_chain(&net->nexthop.notifier_chain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) event_type, nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return notifier_to_errno(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static unsigned int nh_dev_hashfn(unsigned int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) unsigned int mask = NH_DEV_HASHSIZE - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return (val ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) (val >> NH_DEV_HASHBITS) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) (val >> (NH_DEV_HASHBITS * 2))) & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static void nexthop_devhash_add(struct net *net, struct nh_info *nhi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct net_device *dev = nhi->fib_nhc.nhc_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct hlist_head *head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) unsigned int hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) WARN_ON(!dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) hash = nh_dev_hashfn(dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) head = &net->nexthop.devhash[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) hlist_add_head(&nhi->dev_hash, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static void nexthop_free_mpath(struct nexthop *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct nh_group *nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) nhg = rcu_dereference_raw(nh->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) for (i = 0; i < nhg->num_nh; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct nh_grp_entry *nhge = &nhg->nh_entries[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) WARN_ON(!list_empty(&nhge->nh_list));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) nexthop_put(nhge->nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) WARN_ON(nhg->spare == nhg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) kfree(nhg->spare);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) kfree(nhg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static void nexthop_free_single(struct nexthop *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) nhi = rcu_dereference_raw(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) switch (nhi->family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) fib_nh_release(nh->net, &nhi->fib_nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) ipv6_stub->fib6_nh_release(&nhi->fib6_nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) kfree(nhi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) void nexthop_free_rcu(struct rcu_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct nexthop *nh = container_of(head, struct nexthop, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (nh->is_group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) nexthop_free_mpath(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) nexthop_free_single(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) kfree(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) EXPORT_SYMBOL_GPL(nexthop_free_rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static struct nexthop *nexthop_alloc(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) nh = kzalloc(sizeof(struct nexthop), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) INIT_LIST_HEAD(&nh->fi_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) INIT_LIST_HEAD(&nh->f6i_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) INIT_LIST_HEAD(&nh->grp_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) INIT_LIST_HEAD(&nh->fdb_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static struct nh_group *nexthop_grp_alloc(u16 num_nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct nh_group *nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) nhg = kzalloc(struct_size(nhg, nh_entries, num_nh), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (nhg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) nhg->num_nh = num_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static void nh_base_seq_inc(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) while (++net->nexthop.seq == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* no reference taken; rcu lock or rtnl must be held */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct nexthop *nexthop_find_by_id(struct net *net, u32 id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct rb_node **pp, *parent = NULL, *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) pp = &net->nexthop.rb_root.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) next = rcu_dereference_raw(*pp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (!next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) parent = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) nh = rb_entry(parent, struct nexthop, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (id < nh->id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) pp = &next->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) else if (id > nh->id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) pp = &next->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) EXPORT_SYMBOL_GPL(nexthop_find_by_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /* used for auto id allocation; called with rtnl held */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static u32 nh_find_unused_id(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) u32 id_start = net->nexthop.last_id_allocated;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) net->nexthop.last_id_allocated++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (net->nexthop.last_id_allocated == id_start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (!nexthop_find_by_id(net, net->nexthop.last_id_allocated))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return net->nexthop.last_id_allocated;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static int nla_put_nh_group(struct sk_buff *skb, struct nh_group *nhg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct nexthop_grp *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) size_t len = nhg->num_nh * sizeof(*p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) struct nlattr *nla;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) u16 group_type = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (nhg->mpath)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) group_type = NEXTHOP_GRP_TYPE_MPATH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (nla_put_u16(skb, NHA_GROUP_TYPE, group_type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) nla = nla_reserve(skb, NHA_GROUP, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (!nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) p = nla_data(nla);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) for (i = 0; i < nhg->num_nh; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) p->id = nhg->nh_entries[i].nh->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) p->weight = nhg->nh_entries[i].weight - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) p += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int nh_fill_node(struct sk_buff *skb, struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) int event, u32 portid, u32 seq, unsigned int nlflags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) struct fib6_nh *fib6_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) struct fib_nh *fib_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) struct nhmsg *nhm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nhm), nlflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (!nlh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) nhm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) nhm->nh_family = AF_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) nhm->nh_flags = nh->nh_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) nhm->nh_protocol = nh->protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) nhm->nh_scope = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) nhm->resvd = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (nla_put_u32(skb, NHA_ID, nh->id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (nh->is_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct nh_group *nhg = rtnl_dereference(nh->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (nhg->fdb_nh && nla_put_flag(skb, NHA_FDB))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (nla_put_nh_group(skb, nhg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) nhi = rtnl_dereference(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) nhm->nh_family = nhi->family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (nhi->reject_nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (nla_put_flag(skb, NHA_BLACKHOLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) } else if (nhi->fdb_nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (nla_put_flag(skb, NHA_FDB))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) const struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) dev = nhi->fib_nhc.nhc_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (dev && nla_put_u32(skb, NHA_OIF, dev->ifindex))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) nhm->nh_scope = nhi->fib_nhc.nhc_scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) switch (nhi->family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) fib_nh = &nhi->fib_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (fib_nh->fib_nh_gw_family &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) nla_put_be32(skb, NHA_GATEWAY, fib_nh->fib_nh_gw4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) fib6_nh = &nhi->fib6_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (fib6_nh->fib_nh_gw_family &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) nla_put_in6_addr(skb, NHA_GATEWAY, &fib6_nh->fib_nh_gw6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (nhi->fib_nhc.nhc_lwtstate &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) lwtunnel_fill_encap(skb, nhi->fib_nhc.nhc_lwtstate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) NHA_ENCAP, NHA_ENCAP_TYPE) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) nlmsg_end(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) nlmsg_cancel(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) static size_t nh_nlmsg_size_grp(struct nexthop *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) struct nh_group *nhg = rtnl_dereference(nh->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) size_t sz = sizeof(struct nexthop_grp) * nhg->num_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) return nla_total_size(sz) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) nla_total_size(2); /* NHA_GROUP_TYPE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static size_t nh_nlmsg_size_single(struct nexthop *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) struct nh_info *nhi = rtnl_dereference(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) size_t sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) /* covers NHA_BLACKHOLE since NHA_OIF and BLACKHOLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * are mutually exclusive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) sz = nla_total_size(4); /* NHA_OIF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) switch (nhi->family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (nhi->fib_nh.fib_nh_gw_family)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) sz += nla_total_size(4); /* NHA_GATEWAY */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) /* NHA_GATEWAY */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (nhi->fib6_nh.fib_nh_gw_family)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) sz += nla_total_size(sizeof(const struct in6_addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) if (nhi->fib_nhc.nhc_lwtstate) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) sz += lwtunnel_get_encap_size(nhi->fib_nhc.nhc_lwtstate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) sz += nla_total_size(2); /* NHA_ENCAP_TYPE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) static size_t nh_nlmsg_size(struct nexthop *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) size_t sz = NLMSG_ALIGN(sizeof(struct nhmsg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) sz += nla_total_size(4); /* NHA_ID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (nh->is_group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) sz += nh_nlmsg_size_grp(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) sz += nh_nlmsg_size_single(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static void nexthop_notify(int event, struct nexthop *nh, struct nl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) unsigned int nlflags = info->nlh ? info->nlh->nlmsg_flags : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) u32 seq = info->nlh ? info->nlh->nlmsg_seq : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) int err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) skb = nlmsg_new(nh_nlmsg_size(nh), gfp_any());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) err = nh_fill_node(skb, nh, event, info->portid, seq, nlflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) /* -EMSGSIZE implies BUG in nh_nlmsg_size() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) WARN_ON(err == -EMSGSIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) rtnl_notify(skb, info->nl_net, info->portid, RTNLGRP_NEXTHOP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) info->nlh, gfp_any());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) rtnl_set_sk_err(info->nl_net, RTNLGRP_NEXTHOP, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static bool valid_group_nh(struct nexthop *nh, unsigned int npaths,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) bool *is_fdb, struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (nh->is_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) struct nh_group *nhg = rtnl_dereference(nh->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /* nested multipath (group within a group) is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) * supported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (nhg->mpath) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) "Multipath group can not be a nexthop within a group");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) *is_fdb = nhg->fdb_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct nh_info *nhi = rtnl_dereference(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (nhi->reject_nh && npaths > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) "Blackhole nexthop can not be used in a group with more than 1 path");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) *is_fdb = nhi->fdb_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static int nh_check_attr_fdb_group(struct nexthop *nh, u8 *nh_family,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) nhi = rtnl_dereference(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (!nhi->fdb_nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) NL_SET_ERR_MSG(extack, "FDB nexthop group can only have fdb nexthops");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (*nh_family == AF_UNSPEC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) *nh_family = nhi->family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) } else if (*nh_family != nhi->family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) NL_SET_ERR_MSG(extack, "FDB nexthop group cannot have mixed family nexthops");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) static int nh_check_attr_group(struct net *net, struct nlattr *tb[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) unsigned int len = nla_len(tb[NHA_GROUP]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) u8 nh_family = AF_UNSPEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) struct nexthop_grp *nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) unsigned int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) u8 nhg_fdb = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (!len || len & (sizeof(struct nexthop_grp) - 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) "Invalid length for nexthop group attribute");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /* convert len to number of nexthop ids */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) len /= sizeof(*nhg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) nhg = nla_data(tb[NHA_GROUP]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) for (i = 0; i < len; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (nhg[i].resvd1 || nhg[i].resvd2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) NL_SET_ERR_MSG(extack, "Reserved fields in nexthop_grp must be 0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (nhg[i].weight > 254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) NL_SET_ERR_MSG(extack, "Invalid value for weight");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) for (j = i + 1; j < len; ++j) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (nhg[i].id == nhg[j].id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) NL_SET_ERR_MSG(extack, "Nexthop id can not be used twice in a group");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) if (tb[NHA_FDB])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) nhg_fdb = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) nhg = nla_data(tb[NHA_GROUP]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) for (i = 0; i < len; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) bool is_fdb_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) nh = nexthop_find_by_id(net, nhg[i].id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (!nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) NL_SET_ERR_MSG(extack, "Invalid nexthop id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (!valid_group_nh(nh, len, &is_fdb_nh, extack))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (nhg_fdb && nh_check_attr_fdb_group(nh, &nh_family, extack))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (!nhg_fdb && is_fdb_nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) NL_SET_ERR_MSG(extack, "Non FDB nexthop group cannot have fdb nexthops");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) for (i = NHA_GROUP_TYPE + 1; i < __NHA_MAX; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) if (!tb[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (i == NHA_FDB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) "No other attributes can be set in nexthop groups");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) static bool ipv6_good_nh(const struct fib6_nh *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) int state = NUD_REACHABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) struct neighbour *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) rcu_read_lock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) n = __ipv6_neigh_lookup_noref_stub(nh->fib_nh_dev, &nh->fib_nh_gw6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) state = n->nud_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) rcu_read_unlock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return !!(state & NUD_VALID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) static bool ipv4_good_nh(const struct fib_nh *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) int state = NUD_REACHABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) struct neighbour *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) rcu_read_lock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) n = __ipv4_neigh_lookup_noref(nh->fib_nh_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) (__force u32)nh->fib_nh_gw4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) state = n->nud_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) rcu_read_unlock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return !!(state & NUD_VALID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) struct nexthop *nexthop_select_path(struct nexthop *nh, int hash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) struct nexthop *rc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) struct nh_group *nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) if (!nh->is_group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) return nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) nhg = rcu_dereference(nh->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) for (i = 0; i < nhg->num_nh; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) struct nh_grp_entry *nhge = &nhg->nh_entries[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) if (hash > atomic_read(&nhge->upper_bound))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) nhi = rcu_dereference(nhge->nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) if (nhi->fdb_nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) return nhge->nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) /* nexthops always check if it is good and does
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * not rely on a sysctl for this behavior
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) switch (nhi->family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) if (ipv4_good_nh(&nhi->fib_nh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return nhge->nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (ipv6_good_nh(&nhi->fib6_nh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) return nhge->nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) rc = nhge->nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) EXPORT_SYMBOL_GPL(nexthop_select_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) int nexthop_for_each_fib6_nh(struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) int (*cb)(struct fib6_nh *nh, void *arg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) void *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) if (nh->is_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) struct nh_group *nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) nhg = rcu_dereference_rtnl(nh->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) for (i = 0; i < nhg->num_nh; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) struct nh_grp_entry *nhge = &nhg->nh_entries[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) nhi = rcu_dereference_rtnl(nhge->nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) err = cb(&nhi->fib6_nh, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) nhi = rcu_dereference_rtnl(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) err = cb(&nhi->fib6_nh, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) EXPORT_SYMBOL_GPL(nexthop_for_each_fib6_nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) static int check_src_addr(const struct in6_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) if (!ipv6_addr_any(saddr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) NL_SET_ERR_MSG(extack, "IPv6 routes using source address can not use nexthop objects");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) int fib6_check_nexthop(struct nexthop *nh, struct fib6_config *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) bool is_fdb_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) /* fib6_src is unique to a fib6_info and limits the ability to cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) * routes in fib6_nh within a nexthop that is potentially shared
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) * across multiple fib entries. If the config wants to use source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) * routing it can not use nexthop objects. mlxsw also does not allow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) * fib6_src on routes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (cfg && check_src_addr(&cfg->fc_src, extack) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) if (nh->is_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) struct nh_group *nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) nhg = rtnl_dereference(nh->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) if (nhg->has_v4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) goto no_v4_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) is_fdb_nh = nhg->fdb_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) nhi = rtnl_dereference(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (nhi->family == AF_INET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) goto no_v4_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) is_fdb_nh = nhi->fdb_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) if (is_fdb_nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) NL_SET_ERR_MSG(extack, "Route cannot point to a fdb nexthop");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) no_v4_nh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) NL_SET_ERR_MSG(extack, "IPv6 routes can not use an IPv4 nexthop");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) EXPORT_SYMBOL_GPL(fib6_check_nexthop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) /* if existing nexthop has ipv6 routes linked to it, need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) * to verify this new spec works with ipv6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) static int fib6_check_nh_list(struct nexthop *old, struct nexthop *new,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) struct fib6_info *f6i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) if (list_empty(&old->f6i_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) list_for_each_entry(f6i, &old->f6i_list, nh_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (check_src_addr(&f6i->fib6_src.addr, extack) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) return fib6_check_nexthop(new, NULL, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) static int nexthop_check_scope(struct nh_info *nhi, u8 scope,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) if (scope == RT_SCOPE_HOST && nhi->fib_nhc.nhc_gw_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) "Route with host scope can not have a gateway");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if (nhi->fib_nhc.nhc_flags & RTNH_F_ONLINK && scope >= RT_SCOPE_LINK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) NL_SET_ERR_MSG(extack, "Scope mismatch with nexthop");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) /* Invoked by fib add code to verify nexthop by id is ok with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * config for prefix; parts of fib_check_nh not done when nexthop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) * object is used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) int fib_check_nexthop(struct nexthop *nh, u8 scope,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) if (nh->is_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) struct nh_group *nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) nhg = rtnl_dereference(nh->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) if (nhg->fdb_nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) NL_SET_ERR_MSG(extack, "Route cannot point to a fdb nexthop");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) if (scope == RT_SCOPE_HOST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) NL_SET_ERR_MSG(extack, "Route with host scope can not have multiple nexthops");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) /* all nexthops in a group have the same scope */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) nhi = rtnl_dereference(nhg->nh_entries[0].nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) err = nexthop_check_scope(nhi, scope, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) nhi = rtnl_dereference(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) if (nhi->fdb_nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) NL_SET_ERR_MSG(extack, "Route cannot point to a fdb nexthop");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) err = nexthop_check_scope(nhi, scope, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) static int fib_check_nh_list(struct nexthop *old, struct nexthop *new,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) struct fib_info *fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) list_for_each_entry(fi, &old->fi_list, nh_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) err = fib_check_nexthop(new, fi->fib_scope, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) static void nh_group_rebalance(struct nh_group *nhg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) int total = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) int w = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) for (i = 0; i < nhg->num_nh; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) total += nhg->nh_entries[i].weight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) for (i = 0; i < nhg->num_nh; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) struct nh_grp_entry *nhge = &nhg->nh_entries[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) int upper_bound;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) w += nhge->weight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) upper_bound = DIV_ROUND_CLOSEST_ULL((u64)w << 31, total) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) atomic_set(&nhge->upper_bound, upper_bound);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) static void remove_nh_grp_entry(struct net *net, struct nh_grp_entry *nhge,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) struct nl_info *nlinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) struct nh_grp_entry *nhges, *new_nhges;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) struct nexthop *nhp = nhge->nh_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) struct nexthop *nh = nhge->nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) struct nh_group *nhg, *newg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) WARN_ON(!nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) nhg = rtnl_dereference(nhp->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) newg = nhg->spare;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) /* last entry, keep it visible and remove the parent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) if (nhg->num_nh == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) remove_nexthop(net, nhp, nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) newg->has_v4 = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) newg->mpath = nhg->mpath;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) newg->fdb_nh = nhg->fdb_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) newg->num_nh = nhg->num_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) /* copy old entries to new except the one getting removed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) nhges = nhg->nh_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) new_nhges = newg->nh_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) for (i = 0, j = 0; i < nhg->num_nh; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) /* current nexthop getting removed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) if (nhg->nh_entries[i].nh == nh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) newg->num_nh--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) nhi = rtnl_dereference(nhges[i].nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) if (nhi->family == AF_INET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) newg->has_v4 = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) list_del(&nhges[i].nh_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) new_nhges[j].nh_parent = nhges[i].nh_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) new_nhges[j].nh = nhges[i].nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) new_nhges[j].weight = nhges[i].weight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) list_add(&new_nhges[j].nh_list, &new_nhges[j].nh->grp_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) j++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) nh_group_rebalance(newg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) rcu_assign_pointer(nhp->nh_grp, newg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) list_del(&nhge->nh_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) nexthop_put(nhge->nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) if (nlinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) nexthop_notify(RTM_NEWNEXTHOP, nhp, nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) static void remove_nexthop_from_groups(struct net *net, struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) struct nl_info *nlinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) struct nh_grp_entry *nhge, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) list_for_each_entry_safe(nhge, tmp, &nh->grp_list, nh_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) remove_nh_grp_entry(net, nhge, nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) /* make sure all see the newly published array before releasing rtnl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) synchronize_net();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) static void remove_nexthop_group(struct nexthop *nh, struct nl_info *nlinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) struct nh_group *nhg = rcu_dereference_rtnl(nh->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) int i, num_nh = nhg->num_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) for (i = 0; i < num_nh; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) struct nh_grp_entry *nhge = &nhg->nh_entries[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) if (WARN_ON(!nhge->nh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) list_del_init(&nhge->nh_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) /* not called for nexthop replace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) static void __remove_nexthop_fib(struct net *net, struct nexthop *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) struct fib6_info *f6i, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) bool do_flush = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) struct fib_info *fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) list_for_each_entry(fi, &nh->fi_list, nh_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) fi->fib_flags |= RTNH_F_DEAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) do_flush = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) if (do_flush)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) fib_flush(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) /* ip6_del_rt removes the entry from this list hence the _safe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) list_for_each_entry_safe(f6i, tmp, &nh->f6i_list, nh_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) /* __ip6_del_rt does a release, so do a hold here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) fib6_info_hold(f6i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) ipv6_stub->ip6_del_rt(net, f6i,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) !net->ipv4.sysctl_nexthop_compat_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) static void __remove_nexthop(struct net *net, struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) struct nl_info *nlinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) __remove_nexthop_fib(net, nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) if (nh->is_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) remove_nexthop_group(nh, nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) nhi = rtnl_dereference(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) if (nhi->fib_nhc.nhc_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) hlist_del(&nhi->dev_hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) remove_nexthop_from_groups(net, nh, nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) static void remove_nexthop(struct net *net, struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) struct nl_info *nlinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) call_nexthop_notifiers(net, NEXTHOP_EVENT_DEL, nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) /* remove from the tree */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) rb_erase(&nh->rb_node, &net->nexthop.rb_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) if (nlinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) nexthop_notify(RTM_DELNEXTHOP, nh, nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) __remove_nexthop(net, nh, nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) nh_base_seq_inc(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) nexthop_put(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) /* if any FIB entries reference this nexthop, any dst entries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) * need to be regenerated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) static void nh_rt_cache_flush(struct net *net, struct nexthop *nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) struct fib6_info *f6i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) if (!list_empty(&nh->fi_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) rt_cache_flush(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) list_for_each_entry(f6i, &nh->f6i_list, nh_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) ipv6_stub->fib6_update_sernum(net, f6i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) static int replace_nexthop_grp(struct net *net, struct nexthop *old,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) struct nexthop *new,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) struct nh_group *oldg, *newg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) if (!new->is_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) NL_SET_ERR_MSG(extack, "Can not replace a nexthop group with a nexthop.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) oldg = rtnl_dereference(old->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) newg = rtnl_dereference(new->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) /* update parents - used by nexthop code for cleanup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) for (i = 0; i < newg->num_nh; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) newg->nh_entries[i].nh_parent = old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) rcu_assign_pointer(old->nh_grp, newg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) for (i = 0; i < oldg->num_nh; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) oldg->nh_entries[i].nh_parent = new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) rcu_assign_pointer(new->nh_grp, oldg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) static void nh_group_v4_update(struct nh_group *nhg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) struct nh_grp_entry *nhges;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) bool has_v4 = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) nhges = nhg->nh_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) for (i = 0; i < nhg->num_nh; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) nhi = rtnl_dereference(nhges[i].nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) if (nhi->family == AF_INET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) has_v4 = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) nhg->has_v4 = has_v4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) static int replace_nexthop_single(struct net *net, struct nexthop *old,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) struct nexthop *new,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) struct nh_info *oldi, *newi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) if (new->is_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) NL_SET_ERR_MSG(extack, "Can not replace a nexthop with a nexthop group.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) oldi = rtnl_dereference(old->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) newi = rtnl_dereference(new->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) newi->nh_parent = old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) oldi->nh_parent = new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) old->protocol = new->protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) old->nh_flags = new->nh_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) rcu_assign_pointer(old->nh_info, newi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) rcu_assign_pointer(new->nh_info, oldi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) /* When replacing an IPv4 nexthop with an IPv6 nexthop, potentially
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) * update IPv4 indication in all the groups using the nexthop.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) if (oldi->family == AF_INET && newi->family == AF_INET6) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) struct nh_grp_entry *nhge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) list_for_each_entry(nhge, &old->grp_list, nh_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) struct nexthop *nhp = nhge->nh_parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) struct nh_group *nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) nhg = rtnl_dereference(nhp->nh_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) nh_group_v4_update(nhg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) static void __nexthop_replace_notify(struct net *net, struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) struct nl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) struct fib6_info *f6i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) if (!list_empty(&nh->fi_list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) struct fib_info *fi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) /* expectation is a few fib_info per nexthop and then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) * a lot of routes per fib_info. So mark the fib_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) * and then walk the fib tables once
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) list_for_each_entry(fi, &nh->fi_list, nh_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) fi->nh_updated = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) fib_info_notify_update(net, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) list_for_each_entry(fi, &nh->fi_list, nh_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) fi->nh_updated = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) list_for_each_entry(f6i, &nh->f6i_list, nh_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) ipv6_stub->fib6_rt_update(net, f6i, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) /* send RTM_NEWROUTE with REPLACE flag set for all FIB entries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) * linked to this nexthop and for all groups that the nexthop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) * is a member of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) static void nexthop_replace_notify(struct net *net, struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) struct nl_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) struct nh_grp_entry *nhge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) __nexthop_replace_notify(net, nh, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) list_for_each_entry(nhge, &nh->grp_list, nh_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) __nexthop_replace_notify(net, nhge->nh_parent, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) static int replace_nexthop(struct net *net, struct nexthop *old,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) struct nexthop *new, struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) bool new_is_reject = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) struct nh_grp_entry *nhge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) /* check that existing FIB entries are ok with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) * new nexthop definition
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) err = fib_check_nh_list(old, new, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) err = fib6_check_nh_list(old, new, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) if (!new->is_group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) struct nh_info *nhi = rtnl_dereference(new->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) new_is_reject = nhi->reject_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) list_for_each_entry(nhge, &old->grp_list, nh_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) /* if new nexthop is a blackhole, any groups using this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) * nexthop cannot have more than 1 path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) if (new_is_reject &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) nexthop_num_path(nhge->nh_parent) > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) NL_SET_ERR_MSG(extack, "Blackhole nexthop can not be a member of a group with more than one path");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) err = fib_check_nh_list(nhge->nh_parent, new, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) err = fib6_check_nh_list(nhge->nh_parent, new, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) if (old->is_group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) err = replace_nexthop_grp(net, old, new, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) err = replace_nexthop_single(net, old, new, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) nh_rt_cache_flush(net, old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) __remove_nexthop(net, new, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) nexthop_put(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) /* called with rtnl_lock held */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) static int insert_nexthop(struct net *net, struct nexthop *new_nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) struct nh_config *cfg, struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) struct rb_node **pp, *parent = NULL, *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) struct rb_root *root = &net->nexthop.rb_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) bool replace = !!(cfg->nlflags & NLM_F_REPLACE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) bool create = !!(cfg->nlflags & NLM_F_CREATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) u32 new_id = new_nh->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) int replace_notify = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) int rc = -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) pp = &root->rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) next = *pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) if (!next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) parent = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) nh = rb_entry(parent, struct nexthop, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) if (new_id < nh->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) pp = &next->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) } else if (new_id > nh->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) pp = &next->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) } else if (replace) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) rc = replace_nexthop(net, nh, new_nh, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) if (!rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) new_nh = nh; /* send notification with old nh */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) replace_notify = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) /* id already exists and not a replace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) if (replace && !create) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) NL_SET_ERR_MSG(extack, "Replace specified without create and no entry exists");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) rc = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) rb_link_node_rcu(&new_nh->rb_node, parent, pp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) rb_insert_color(&new_nh->rb_node, root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) if (!rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) nh_base_seq_inc(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) nexthop_notify(RTM_NEWNEXTHOP, new_nh, &cfg->nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) if (replace_notify && net->ipv4.sysctl_nexthop_compat_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) nexthop_replace_notify(net, new_nh, &cfg->nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) /* rtnl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) /* remove all nexthops tied to a device being deleted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) static void nexthop_flush_dev(struct net_device *dev, unsigned long event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) unsigned int hash = nh_dev_hashfn(dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) struct net *net = dev_net(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) struct hlist_head *head = &net->nexthop.devhash[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) struct hlist_node *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) hlist_for_each_entry_safe(nhi, n, head, dev_hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) if (nhi->fib_nhc.nhc_dev != dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) if (nhi->reject_nh &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) (event == NETDEV_DOWN || event == NETDEV_CHANGE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) remove_nexthop(net, nhi->nh_parent, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) /* rtnl; called when net namespace is deleted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) static void flush_all_nexthops(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) struct rb_root *root = &net->nexthop.rb_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) struct rb_node *node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) while ((node = rb_first(root))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) nh = rb_entry(node, struct nexthop, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) remove_nexthop(net, nh, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) static struct nexthop *nexthop_create_group(struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) struct nh_config *cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) struct nlattr *grps_attr = cfg->nh_grp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) struct nexthop_grp *entry = nla_data(grps_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) u16 num_nh = nla_len(grps_attr) / sizeof(*entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) struct nh_group *nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) if (WARN_ON(!num_nh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) nh = nexthop_alloc();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) if (!nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) nh->is_group = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) nhg = nexthop_grp_alloc(num_nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) if (!nhg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) kfree(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) /* spare group used for removals */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) nhg->spare = nexthop_grp_alloc(num_nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) if (!nhg->spare) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) kfree(nhg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) kfree(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) nhg->spare->spare = nhg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) for (i = 0; i < nhg->num_nh; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) struct nexthop *nhe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) nhe = nexthop_find_by_id(net, entry[i].id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) if (!nexthop_get(nhe))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) goto out_no_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) nhi = rtnl_dereference(nhe->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) if (nhi->family == AF_INET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) nhg->has_v4 = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) nhg->nh_entries[i].nh = nhe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) nhg->nh_entries[i].weight = entry[i].weight + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) list_add(&nhg->nh_entries[i].nh_list, &nhe->grp_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) nhg->nh_entries[i].nh_parent = nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) if (cfg->nh_grp_type == NEXTHOP_GRP_TYPE_MPATH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) nhg->mpath = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) nh_group_rebalance(nhg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) if (cfg->nh_fdb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) nhg->fdb_nh = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) rcu_assign_pointer(nh->nh_grp, nhg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) return nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) out_no_nh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) for (i--; i >= 0; --i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) list_del(&nhg->nh_entries[i].nh_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) nexthop_put(nhg->nh_entries[i].nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) kfree(nhg->spare);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) kfree(nhg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) kfree(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) static int nh_create_ipv4(struct net *net, struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) struct nh_info *nhi, struct nh_config *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) struct fib_nh *fib_nh = &nhi->fib_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) struct fib_config fib_cfg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) .fc_oif = cfg->nh_ifindex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) .fc_gw4 = cfg->gw.ipv4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) .fc_gw_family = cfg->gw.ipv4 ? AF_INET : 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) .fc_flags = cfg->nh_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) .fc_nlinfo = cfg->nlinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) .fc_encap = cfg->nh_encap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) .fc_encap_type = cfg->nh_encap_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) u32 tb_id = (cfg->dev ? l3mdev_fib_table(cfg->dev) : RT_TABLE_MAIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) err = fib_nh_init(net, fib_nh, &fib_cfg, 1, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) fib_nh_release(net, fib_nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) if (nhi->fdb_nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) /* sets nh_dev if successful */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) err = fib_check_nh(net, fib_nh, tb_id, 0, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) nh->nh_flags = fib_nh->fib_nh_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) fib_info_update_nhc_saddr(net, &fib_nh->nh_common,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) fib_nh->fib_nh_scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) fib_nh_release(net, fib_nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) static int nh_create_ipv6(struct net *net, struct nexthop *nh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) struct nh_info *nhi, struct nh_config *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) struct fib6_nh *fib6_nh = &nhi->fib6_nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) struct fib6_config fib6_cfg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) .fc_table = l3mdev_fib_table(cfg->dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) .fc_ifindex = cfg->nh_ifindex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) .fc_gateway = cfg->gw.ipv6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) .fc_flags = cfg->nh_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) .fc_nlinfo = cfg->nlinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) .fc_encap = cfg->nh_encap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) .fc_encap_type = cfg->nh_encap_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) .fc_is_fdb = cfg->nh_fdb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) if (!ipv6_addr_any(&cfg->gw.ipv6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) fib6_cfg.fc_flags |= RTF_GATEWAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) /* sets nh_dev if successful */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) err = ipv6_stub->fib6_nh_init(net, fib6_nh, &fib6_cfg, GFP_KERNEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) /* IPv6 is not enabled, don't call fib6_nh_release */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) if (err == -EAFNOSUPPORT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) ipv6_stub->fib6_nh_release(fib6_nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) nh->nh_flags = fib6_nh->fib_nh_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) static struct nexthop *nexthop_create(struct net *net, struct nh_config *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) nh = nexthop_alloc();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) if (!nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) nhi = kzalloc(sizeof(*nhi), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) if (!nhi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) kfree(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) nh->nh_flags = cfg->nh_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) nh->net = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) nhi->nh_parent = nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) nhi->family = cfg->nh_family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) nhi->fib_nhc.nhc_scope = RT_SCOPE_LINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) if (cfg->nh_fdb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) nhi->fdb_nh = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) if (cfg->nh_blackhole) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) nhi->reject_nh = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) cfg->nh_ifindex = net->loopback_dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) switch (cfg->nh_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) err = nh_create_ipv4(net, nh, nhi, cfg, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) err = nh_create_ipv6(net, nh, nhi, cfg, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) kfree(nhi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) kfree(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) /* add the entry to the device based hash */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) if (!nhi->fdb_nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) nexthop_devhash_add(net, nhi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) rcu_assign_pointer(nh->nh_info, nhi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) return nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) /* called with rtnl lock held */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) static struct nexthop *nexthop_add(struct net *net, struct nh_config *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) if (cfg->nlflags & NLM_F_REPLACE && !cfg->nh_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) NL_SET_ERR_MSG(extack, "Replace requires nexthop id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) if (!cfg->nh_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) cfg->nh_id = nh_find_unused_id(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) if (!cfg->nh_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) NL_SET_ERR_MSG(extack, "No unused id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) if (cfg->nh_grp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) nh = nexthop_create_group(net, cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) nh = nexthop_create(net, cfg, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) if (IS_ERR(nh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) return nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) refcount_set(&nh->refcnt, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) nh->id = cfg->nh_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) nh->protocol = cfg->nh_protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) nh->net = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) err = insert_nexthop(net, nh, cfg, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) __remove_nexthop(net, nh, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) nexthop_put(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) nh = ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) return nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) static int rtm_to_nh_config(struct net *net, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) struct nlmsghdr *nlh, struct nh_config *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) struct nhmsg *nhm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) struct nlattr *tb[NHA_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) err = nlmsg_parse(nlh, sizeof(*nhm), tb, NHA_MAX, rtm_nh_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) if (nhm->resvd || nhm->nh_scope) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) NL_SET_ERR_MSG(extack, "Invalid values in ancillary header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) if (nhm->nh_flags & ~NEXTHOP_VALID_USER_FLAGS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) NL_SET_ERR_MSG(extack, "Invalid nexthop flags in ancillary header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) switch (nhm->nh_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) case AF_UNSPEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) if (tb[NHA_GROUP])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) NL_SET_ERR_MSG(extack, "Invalid address family");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) if (tb[NHA_GROUPS] || tb[NHA_MASTER]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) NL_SET_ERR_MSG(extack, "Invalid attributes in request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) memset(cfg, 0, sizeof(*cfg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) cfg->nlflags = nlh->nlmsg_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) cfg->nlinfo.portid = NETLINK_CB(skb).portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) cfg->nlinfo.nlh = nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) cfg->nlinfo.nl_net = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) cfg->nh_family = nhm->nh_family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) cfg->nh_protocol = nhm->nh_protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) cfg->nh_flags = nhm->nh_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) if (tb[NHA_ID])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) cfg->nh_id = nla_get_u32(tb[NHA_ID]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) if (tb[NHA_FDB]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) if (tb[NHA_OIF] || tb[NHA_BLACKHOLE] ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) tb[NHA_ENCAP] || tb[NHA_ENCAP_TYPE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) NL_SET_ERR_MSG(extack, "Fdb attribute can not be used with encap, oif or blackhole");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) if (nhm->nh_flags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) NL_SET_ERR_MSG(extack, "Unsupported nexthop flags in ancillary header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) cfg->nh_fdb = nla_get_flag(tb[NHA_FDB]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) if (tb[NHA_GROUP]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) if (nhm->nh_family != AF_UNSPEC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) NL_SET_ERR_MSG(extack, "Invalid family for group");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) cfg->nh_grp = tb[NHA_GROUP];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) cfg->nh_grp_type = NEXTHOP_GRP_TYPE_MPATH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) if (tb[NHA_GROUP_TYPE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) cfg->nh_grp_type = nla_get_u16(tb[NHA_GROUP_TYPE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) if (cfg->nh_grp_type > NEXTHOP_GRP_TYPE_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) NL_SET_ERR_MSG(extack, "Invalid group type");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) err = nh_check_attr_group(net, tb, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) /* no other attributes should be set */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) if (tb[NHA_BLACKHOLE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) if (tb[NHA_GATEWAY] || tb[NHA_OIF] ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) tb[NHA_ENCAP] || tb[NHA_ENCAP_TYPE] || tb[NHA_FDB]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) NL_SET_ERR_MSG(extack, "Blackhole attribute can not be used with gateway, oif, encap or fdb");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) cfg->nh_blackhole = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) if (!cfg->nh_fdb && !tb[NHA_OIF]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) NL_SET_ERR_MSG(extack, "Device attribute required for non-blackhole and non-fdb nexthops");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) if (!cfg->nh_fdb && tb[NHA_OIF]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) cfg->nh_ifindex = nla_get_u32(tb[NHA_OIF]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) if (cfg->nh_ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) cfg->dev = __dev_get_by_index(net, cfg->nh_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) if (!cfg->dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) NL_SET_ERR_MSG(extack, "Invalid device index");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) } else if (!(cfg->dev->flags & IFF_UP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) NL_SET_ERR_MSG(extack, "Nexthop device is not up");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) err = -ENETDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) } else if (!netif_carrier_ok(cfg->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) NL_SET_ERR_MSG(extack, "Carrier for nexthop device is down");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) err = -ENETDOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) if (tb[NHA_GATEWAY]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) struct nlattr *gwa = tb[NHA_GATEWAY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) switch (cfg->nh_family) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) case AF_INET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) if (nla_len(gwa) != sizeof(u32)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) NL_SET_ERR_MSG(extack, "Invalid gateway");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) cfg->gw.ipv4 = nla_get_be32(gwa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) case AF_INET6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) if (nla_len(gwa) != sizeof(struct in6_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) NL_SET_ERR_MSG(extack, "Invalid gateway");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) cfg->gw.ipv6 = nla_get_in6_addr(gwa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) "Unknown address family for gateway");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) /* device only nexthop (no gateway) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) if (cfg->nh_flags & RTNH_F_ONLINK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) NL_SET_ERR_MSG(extack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) "ONLINK flag can not be set for nexthop without a gateway");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) if (tb[NHA_ENCAP]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) cfg->nh_encap = tb[NHA_ENCAP];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) if (!tb[NHA_ENCAP_TYPE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) NL_SET_ERR_MSG(extack, "LWT encapsulation type is missing");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) cfg->nh_encap_type = nla_get_u16(tb[NHA_ENCAP_TYPE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) err = lwtunnel_valid_encap_type(cfg->nh_encap_type, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) } else if (tb[NHA_ENCAP_TYPE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) NL_SET_ERR_MSG(extack, "LWT encapsulation attribute is missing");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) /* rtnl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) static int rtm_new_nexthop(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) struct nh_config cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) err = rtm_to_nh_config(net, skb, nlh, &cfg, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) nh = nexthop_add(net, &cfg, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) if (IS_ERR(nh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) err = PTR_ERR(nh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) static int nh_valid_get_del_req(struct nlmsghdr *nlh, u32 *id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) struct nhmsg *nhm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) struct nlattr *tb[NHA_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) int err, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) err = nlmsg_parse(nlh, sizeof(*nhm), tb, NHA_MAX, rtm_nh_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) for (i = 0; i < __NHA_MAX; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) if (!tb[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) switch (i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) case NHA_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) NL_SET_ERR_MSG_ATTR(extack, tb[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) "Unexpected attribute in request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) if (nhm->nh_protocol || nhm->resvd || nhm->nh_scope || nhm->nh_flags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) NL_SET_ERR_MSG(extack, "Invalid values in header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) if (!tb[NHA_ID]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) NL_SET_ERR_MSG(extack, "Nexthop id is missing");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) *id = nla_get_u32(tb[NHA_ID]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) if (!(*id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) NL_SET_ERR_MSG(extack, "Invalid nexthop id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) /* rtnl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) static int rtm_del_nexthop(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) struct nl_info nlinfo = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) .nlh = nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) .nl_net = net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) .portid = NETLINK_CB(skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) u32 id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) err = nh_valid_get_del_req(nlh, &id, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) nh = nexthop_find_by_id(net, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) if (!nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) remove_nexthop(net, nh, &nlinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) /* rtnl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) static int rtm_get_nexthop(struct sk_buff *in_skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) struct net *net = sock_net(in_skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) struct sk_buff *skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) u32 id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) err = nh_valid_get_del_req(nlh, &id, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) nh = nexthop_find_by_id(net, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) if (!nh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) goto errout_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) err = nh_fill_node(skb, nh, RTM_NEWNEXTHOP, NETLINK_CB(in_skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) nlh->nlmsg_seq, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) WARN_ON(err == -EMSGSIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) goto errout_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) errout_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) static bool nh_dump_filtered(struct nexthop *nh, int dev_idx, int master_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) bool group_filter, u8 family)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) const struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) const struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) if (group_filter && !nh->is_group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) if (!dev_idx && !master_idx && !family)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) if (nh->is_group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) nhi = rtnl_dereference(nh->nh_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) if (family && nhi->family != family)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) dev = nhi->fib_nhc.nhc_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) if (dev_idx && (!dev || dev->ifindex != dev_idx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) if (master_idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) struct net_device *master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) master = netdev_master_upper_dev_get((struct net_device *)dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) if (!master || master->ifindex != master_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) static int nh_valid_dump_req(const struct nlmsghdr *nlh, int *dev_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) int *master_idx, bool *group_filter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) bool *fdb_filter, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) struct netlink_ext_ack *extack = cb->extack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) struct nlattr *tb[NHA_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) struct nhmsg *nhm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) int err, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) u32 idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) err = nlmsg_parse(nlh, sizeof(*nhm), tb, NHA_MAX, rtm_nh_policy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) for (i = 0; i <= NHA_MAX; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) if (!tb[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) switch (i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) case NHA_OIF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) idx = nla_get_u32(tb[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) if (idx > INT_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) NL_SET_ERR_MSG(extack, "Invalid device index");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) *dev_idx = idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) case NHA_MASTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) idx = nla_get_u32(tb[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) if (idx > INT_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) NL_SET_ERR_MSG(extack, "Invalid master device index");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) *master_idx = idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) case NHA_GROUPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) *group_filter = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) case NHA_FDB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) *fdb_filter = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) NL_SET_ERR_MSG(extack, "Unsupported attribute in dump request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) nhm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) if (nhm->nh_protocol || nhm->resvd || nhm->nh_scope || nhm->nh_flags) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) NL_SET_ERR_MSG(extack, "Invalid values in header for nexthop dump request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) /* rtnl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) static int rtm_dump_nexthop(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) bool group_filter = false, fdb_filter = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) struct nhmsg *nhm = nlmsg_data(cb->nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) int dev_filter_idx = 0, master_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) struct rb_root *root = &net->nexthop.rb_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) struct rb_node *node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) int idx = 0, s_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) err = nh_valid_dump_req(cb->nlh, &dev_filter_idx, &master_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) &group_filter, &fdb_filter, cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) s_idx = cb->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) for (node = rb_first(root); node; node = rb_next(node)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) struct nexthop *nh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) if (idx < s_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) goto cont;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) nh = rb_entry(node, struct nexthop, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) if (nh_dump_filtered(nh, dev_filter_idx, master_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) group_filter, nhm->nh_family))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) goto cont;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) err = nh_fill_node(skb, nh, RTM_NEWNEXTHOP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) cb->nlh->nlmsg_seq, NLM_F_MULTI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) if (likely(skb->len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) cont:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) err = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) cb->args[0] = idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) cb->seq = net->nexthop.seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) nl_dump_check_consistent(cb, nlmsg_hdr(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) static void nexthop_sync_mtu(struct net_device *dev, u32 orig_mtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) unsigned int hash = nh_dev_hashfn(dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) struct net *net = dev_net(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) struct hlist_head *head = &net->nexthop.devhash[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) struct hlist_node *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) struct nh_info *nhi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) hlist_for_each_entry_safe(nhi, n, head, dev_hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) if (nhi->fib_nhc.nhc_dev == dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) if (nhi->family == AF_INET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) fib_nhc_update_mtu(&nhi->fib_nhc, dev->mtu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) orig_mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) /* rtnl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) static int nh_netdev_event(struct notifier_block *this,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) unsigned long event, void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) struct net_device *dev = netdev_notifier_info_to_dev(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) struct netdev_notifier_info_ext *info_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) case NETDEV_DOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) case NETDEV_UNREGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) nexthop_flush_dev(dev, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) case NETDEV_CHANGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) if (!(dev_get_flags(dev) & (IFF_RUNNING | IFF_LOWER_UP)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) nexthop_flush_dev(dev, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) case NETDEV_CHANGEMTU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) info_ext = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) nexthop_sync_mtu(dev, info_ext->ext.mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) rt_cache_flush(dev_net(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) static struct notifier_block nh_netdev_notifier = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) .notifier_call = nh_netdev_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) int register_nexthop_notifier(struct net *net, struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) return blocking_notifier_chain_register(&net->nexthop.notifier_chain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) EXPORT_SYMBOL(register_nexthop_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) int unregister_nexthop_notifier(struct net *net, struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) return blocking_notifier_chain_unregister(&net->nexthop.notifier_chain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) EXPORT_SYMBOL(unregister_nexthop_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) static void __net_exit nexthop_net_exit(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) flush_all_nexthops(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) kfree(net->nexthop.devhash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) static int __net_init nexthop_net_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) size_t sz = sizeof(struct hlist_head) * NH_DEV_HASHSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) net->nexthop.rb_root = RB_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) net->nexthop.devhash = kzalloc(sz, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) if (!net->nexthop.devhash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) BLOCKING_INIT_NOTIFIER_HEAD(&net->nexthop.notifier_chain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) static struct pernet_operations nexthop_net_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) .init = nexthop_net_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) .exit = nexthop_net_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) static int __init nexthop_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) register_pernet_subsys(&nexthop_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) register_netdevice_notifier(&nh_netdev_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) rtnl_register(PF_UNSPEC, RTM_NEWNEXTHOP, rtm_new_nexthop, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) rtnl_register(PF_UNSPEC, RTM_DELNEXTHOP, rtm_del_nexthop, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) rtnl_register(PF_UNSPEC, RTM_GETNEXTHOP, rtm_get_nexthop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) rtm_dump_nexthop, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) rtnl_register(PF_INET, RTM_NEWNEXTHOP, rtm_new_nexthop, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) rtnl_register(PF_INET, RTM_GETNEXTHOP, NULL, rtm_dump_nexthop, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) rtnl_register(PF_INET6, RTM_NEWNEXTHOP, rtm_new_nexthop, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) rtnl_register(PF_INET6, RTM_GETNEXTHOP, NULL, rtm_dump_nexthop, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) subsys_initcall(nexthop_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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