Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * xfrm6_policy.c: based on xfrm4_policy.c |
| 3 | * |
| 4 | * Authors: |
| 5 | * Mitsuru KANDA @USAGI |
| 6 | * Kazunori MIYAZAWA @USAGI |
| 7 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> |
| 8 | * IPv6 support |
| 9 | * YOSHIFUJI Hideaki |
| 10 | * Split up af-specific portion |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 11 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | */ |
| 13 | |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 14 | #include <linux/err.h> |
| 15 | #include <linux/kernel.h> |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 16 | #include <linux/netdevice.h> |
| 17 | #include <net/addrconf.h> |
Herbert Xu | 45ff5a3 | 2007-11-13 21:35:32 -0800 | [diff] [blame] | 18 | #include <net/dst.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <net/xfrm.h> |
| 20 | #include <net/ip.h> |
| 21 | #include <net/ipv6.h> |
| 22 | #include <net/ip6_route.h> |
Masahide NAKAMURA | 59fbb3a6 | 2007-06-26 23:56:32 -0700 | [diff] [blame] | 23 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 24 | #include <net/mip6.h> |
| 25 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | static struct xfrm_policy_afinfo xfrm6_policy_afinfo; |
| 28 | |
Alexey Dobriyan | c5b3cf4 | 2008-11-25 17:51:25 -0800 | [diff] [blame] | 29 | static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, |
David S. Miller | 5e6b930 | 2011-02-24 00:14:45 -0500 | [diff] [blame] | 30 | const xfrm_address_t *saddr, |
| 31 | const xfrm_address_t *daddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | { |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 33 | struct flowi6 fl6; |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 34 | struct dst_entry *dst; |
| 35 | int err; |
| 36 | |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 37 | memset(&fl6, 0, sizeof(fl6)); |
| 38 | memcpy(&fl6.daddr, daddr, sizeof(fl6.daddr)); |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 39 | if (saddr) |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 40 | memcpy(&fl6.saddr, saddr, sizeof(fl6.saddr)); |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 41 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 42 | dst = ip6_route_output(net, NULL, &fl6); |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 43 | |
| 44 | err = dst->error; |
| 45 | if (dst->error) { |
Ville Nuorvala | 4251320 | 2006-10-16 22:10:05 -0700 | [diff] [blame] | 46 | dst_release(dst); |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 47 | dst = ERR_PTR(err); |
| 48 | } |
| 49 | |
| 50 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | } |
| 52 | |
Alexey Dobriyan | fbda33b | 2008-11-25 17:56:49 -0800 | [diff] [blame] | 53 | static int xfrm6_get_saddr(struct net *net, |
| 54 | xfrm_address_t *saddr, xfrm_address_t *daddr) |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 55 | { |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 56 | struct dst_entry *dst; |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 57 | struct net_device *dev; |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 58 | |
Alexey Dobriyan | fbda33b | 2008-11-25 17:56:49 -0800 | [diff] [blame] | 59 | dst = xfrm6_dst_lookup(net, 0, NULL, daddr); |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 60 | if (IS_ERR(dst)) |
| 61 | return -EHOSTUNREACH; |
| 62 | |
Brian Haley | 191cd58 | 2008-08-14 15:33:21 -0700 | [diff] [blame] | 63 | dev = ip6_dst_idev(dst)->dev; |
| 64 | ipv6_dev_get_saddr(dev_net(dev), dev, |
YOSHIFUJI Hideaki | 7cbca67 | 2008-03-25 09:37:42 +0900 | [diff] [blame] | 65 | (struct in6_addr *)&daddr->a6, 0, |
YOSHIFUJI Hideaki | 5e5f3f0 | 2008-03-03 21:44:34 +0900 | [diff] [blame] | 66 | (struct in6_addr *)&saddr->a6); |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 67 | dst_release(dst); |
| 68 | return 0; |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 69 | } |
| 70 | |
David S. Miller | 05d8402 | 2011-02-22 17:47:10 -0800 | [diff] [blame] | 71 | static int xfrm6_get_tos(const struct flowi *fl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | return 0; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 74 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 76 | static int xfrm6_init_path(struct xfrm_dst *path, struct dst_entry *dst, |
| 77 | int nfheader_len) |
| 78 | { |
| 79 | if (dst->ops->family == AF_INET6) { |
| 80 | struct rt6_info *rt = (struct rt6_info*)dst; |
| 81 | if (rt->rt6i_node) |
| 82 | path->path_cookie = rt->rt6i_node->fn_sernum; |
| 83 | } |
| 84 | |
| 85 | path->u.rt6.rt6i_nfheader_len = nfheader_len; |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
Herbert Xu | 87c1e12 | 2010-03-02 02:51:56 +0000 | [diff] [blame] | 90 | static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev, |
David S. Miller | 0c7b3ee | 2011-02-22 17:48:57 -0800 | [diff] [blame] | 91 | const struct flowi *fl) |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 92 | { |
| 93 | struct rt6_info *rt = (struct rt6_info*)xdst->route; |
| 94 | |
| 95 | xdst->u.dst.dev = dev; |
| 96 | dev_hold(dev); |
| 97 | |
Nicolas Dichtel | bc8e4b9 | 2010-04-21 16:25:30 -0700 | [diff] [blame] | 98 | xdst->u.rt6.rt6i_idev = in6_dev_get(dev); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 99 | if (!xdst->u.rt6.rt6i_idev) |
| 100 | return -ENODEV; |
| 101 | |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 102 | rt6_transfer_peer(&xdst->u.rt6, rt); |
David S. Miller | 7cc2edb | 2011-01-26 13:41:03 -0800 | [diff] [blame] | 103 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 104 | /* Sheit... I remember I did this right. Apparently, |
| 105 | * it was magically lost, so this code needs audit */ |
David S. Miller | 97cac08 | 2012-07-02 22:43:47 -0700 | [diff] [blame] | 106 | xdst->u.rt6.n = neigh_clone(rt->n); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 107 | xdst->u.rt6.rt6i_flags = rt->rt6i_flags & (RTF_ANYCAST | |
| 108 | RTF_LOCAL); |
| 109 | xdst->u.rt6.rt6i_metric = rt->rt6i_metric; |
| 110 | xdst->u.rt6.rt6i_node = rt->rt6i_node; |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 111 | if (rt->rt6i_node) |
| 112 | xdst->route_cookie = rt->rt6i_node->fn_sernum; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 113 | xdst->u.rt6.rt6i_gateway = rt->rt6i_gateway; |
| 114 | xdst->u.rt6.rt6i_dst = rt->rt6i_dst; |
| 115 | xdst->u.rt6.rt6i_src = rt->rt6i_src; |
| 116 | |
| 117 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | static inline void |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 121 | _decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 123 | struct flowi6 *fl6 = &fl->u.ip6; |
Nicolas Dichtel | 7e3a42a | 2008-11-01 21:12:07 -0700 | [diff] [blame] | 124 | int onlyproto = 0; |
Arnaldo Carvalho de Melo | cfe1fc7 | 2007-03-16 17:26:39 -0300 | [diff] [blame] | 125 | u16 offset = skb_network_header_len(skb); |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 126 | const struct ipv6hdr *hdr = ipv6_hdr(skb); |
YOSHIFUJI Hideaki | e3cae90 | 2006-04-18 14:46:52 -0700 | [diff] [blame] | 127 | struct ipv6_opt_hdr *exthdr; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 128 | const unsigned char *nh = skb_network_header(skb); |
| 129 | u8 nexthdr = nh[IP6CB(skb)->nhoff]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 131 | memset(fl6, 0, sizeof(struct flowi6)); |
| 132 | fl6->flowi6_mark = skb->mark; |
Peter Kosyh | 44b451f | 2010-07-02 07:47:55 +0000 | [diff] [blame] | 133 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 134 | fl6->daddr = reverse ? hdr->saddr : hdr->daddr; |
| 135 | fl6->saddr = reverse ? hdr->daddr : hdr->saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Wei Yongjun | 59cae00 | 2009-07-02 16:59:49 +0000 | [diff] [blame] | 137 | while (nh + offset + 1 < skb->data || |
| 138 | pskb_may_pull(skb, nh + offset + 1 - skb->data)) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 139 | nh = skb_network_header(skb); |
| 140 | exthdr = (struct ipv6_opt_hdr *)(nh + offset); |
YOSHIFUJI Hideaki | e3cae90 | 2006-04-18 14:46:52 -0700 | [diff] [blame] | 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | switch (nexthdr) { |
Nicolas Dichtel | 7e3a42a | 2008-11-01 21:12:07 -0700 | [diff] [blame] | 143 | case NEXTHDR_FRAGMENT: |
| 144 | onlyproto = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | case NEXTHDR_ROUTING: |
| 146 | case NEXTHDR_HOP: |
| 147 | case NEXTHDR_DEST: |
| 148 | offset += ipv6_optlen(exthdr); |
| 149 | nexthdr = exthdr->nexthdr; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 150 | exthdr = (struct ipv6_opt_hdr *)(nh + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | break; |
| 152 | |
| 153 | case IPPROTO_UDP: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 154 | case IPPROTO_UDPLITE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | case IPPROTO_TCP: |
| 156 | case IPPROTO_SCTP: |
Patrick McHardy | 9e99999 | 2005-12-19 14:03:46 -0800 | [diff] [blame] | 157 | case IPPROTO_DCCP: |
Wei Yongjun | 59cae00 | 2009-07-02 16:59:49 +0000 | [diff] [blame] | 158 | if (!onlyproto && (nh + offset + 4 < skb->data || |
| 159 | pskb_may_pull(skb, nh + offset + 4 - skb->data))) { |
Al Viro | 8c689a6 | 2006-11-08 00:20:21 -0800 | [diff] [blame] | 160 | __be16 *ports = (__be16 *)exthdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 162 | fl6->fl6_sport = ports[!!reverse]; |
| 163 | fl6->fl6_dport = ports[!reverse]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | } |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 165 | fl6->flowi6_proto = nexthdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | return; |
| 167 | |
| 168 | case IPPROTO_ICMPV6: |
Nicolas Dichtel | 7e3a42a | 2008-11-01 21:12:07 -0700 | [diff] [blame] | 169 | if (!onlyproto && pskb_may_pull(skb, nh + offset + 2 - skb->data)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | u8 *icmp = (u8 *)exthdr; |
| 171 | |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 172 | fl6->fl6_icmp_type = icmp[0]; |
| 173 | fl6->fl6_icmp_code = icmp[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 175 | fl6->flowi6_proto = nexthdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | return; |
| 177 | |
Masahide NAKAMURA | 59fbb3a6 | 2007-06-26 23:56:32 -0700 | [diff] [blame] | 178 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 179 | case IPPROTO_MH: |
Nicolas Dichtel | 7e3a42a | 2008-11-01 21:12:07 -0700 | [diff] [blame] | 180 | if (!onlyproto && pskb_may_pull(skb, nh + offset + 3 - skb->data)) { |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 181 | struct ip6_mh *mh; |
| 182 | mh = (struct ip6_mh *)exthdr; |
| 183 | |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 184 | fl6->fl6_mh_type = mh->ip6mh_type; |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 185 | } |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 186 | fl6->flowi6_proto = nexthdr; |
Masahide NAKAMURA | 2ce4272 | 2006-08-23 20:39:03 -0700 | [diff] [blame] | 187 | return; |
| 188 | #endif |
| 189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | /* XXX Why are there these headers? */ |
| 191 | case IPPROTO_AH: |
| 192 | case IPPROTO_ESP: |
| 193 | case IPPROTO_COMP: |
| 194 | default: |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 195 | fl6->fl6_ipsec_spi = 0; |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 196 | fl6->flowi6_proto = nexthdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | return; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 198 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
| 200 | } |
| 201 | |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 202 | static inline int xfrm6_garbage_collect(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | { |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 204 | struct net *net = container_of(ops, struct net, xfrm.xfrm6_dst_ops); |
| 205 | |
| 206 | xfrm6_policy_afinfo.garbage_collect(net); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 207 | return dst_entries_get_fast(ops) > ops->gc_thresh * 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
| 209 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 210 | static void xfrm6_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 211 | struct sk_buff *skb, u32 mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | { |
| 213 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 214 | struct dst_entry *path = xdst->route; |
| 215 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 216 | path->ops->update_pmtu(path, sk, skb, mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
| 218 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 219 | static void xfrm6_redirect(struct dst_entry *dst, struct sock *sk, |
| 220 | struct sk_buff *skb) |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 221 | { |
| 222 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 223 | struct dst_entry *path = xdst->route; |
| 224 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 225 | path->ops->redirect(path, sk, skb); |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 226 | } |
| 227 | |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 228 | static void xfrm6_dst_destroy(struct dst_entry *dst) |
| 229 | { |
| 230 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 231 | |
| 232 | if (likely(xdst->u.rt6.rt6i_idev)) |
| 233 | in6_dev_put(xdst->u.rt6.rt6i_idev); |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 234 | dst_destroy_metrics_generic(dst); |
David S. Miller | 97bab73 | 2012-06-09 22:36:36 -0700 | [diff] [blame] | 235 | if (rt6_has_peer(&xdst->u.rt6)) { |
| 236 | struct inet_peer *peer = rt6_peer_ptr(&xdst->u.rt6); |
| 237 | inet_putpeer(peer); |
| 238 | } |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 239 | xfrm_dst_destroy(xdst); |
| 240 | } |
| 241 | |
| 242 | static void xfrm6_dst_ifdown(struct dst_entry *dst, struct net_device *dev, |
| 243 | int unregister) |
| 244 | { |
| 245 | struct xfrm_dst *xdst; |
| 246 | |
| 247 | if (!unregister) |
| 248 | return; |
| 249 | |
| 250 | xdst = (struct xfrm_dst *)dst; |
| 251 | if (xdst->u.rt6.rt6i_idev->dev == dev) { |
Denis V. Lunev | 5a3e55d | 2007-12-07 00:38:10 -0800 | [diff] [blame] | 252 | struct inet6_dev *loopback_idev = |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 253 | in6_dev_get(dev_net(dev)->loopback_dev); |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 254 | BUG_ON(!loopback_idev); |
| 255 | |
| 256 | do { |
| 257 | in6_dev_put(xdst->u.rt6.rt6i_idev); |
| 258 | xdst->u.rt6.rt6i_idev = loopback_idev; |
| 259 | in6_dev_hold(loopback_idev); |
| 260 | xdst = (struct xfrm_dst *)xdst->u.dst.child; |
| 261 | } while (xdst->u.dst.xfrm); |
| 262 | |
| 263 | __in6_dev_put(loopback_idev); |
| 264 | } |
| 265 | |
| 266 | xfrm_dst_ifdown(dst, dev); |
| 267 | } |
| 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | static struct dst_ops xfrm6_dst_ops = { |
| 270 | .family = AF_INET6, |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 271 | .protocol = cpu_to_be16(ETH_P_IPV6), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | .gc = xfrm6_garbage_collect, |
| 273 | .update_pmtu = xfrm6_update_pmtu, |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 274 | .redirect = xfrm6_redirect, |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 275 | .cow_metrics = dst_cow_metrics_generic, |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 276 | .destroy = xfrm6_dst_destroy, |
| 277 | .ifdown = xfrm6_dst_ifdown, |
Herbert Xu | 862b82c | 2007-11-13 21:43:11 -0800 | [diff] [blame] | 278 | .local_out = __ip6_local_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | .gc_thresh = 1024, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | }; |
| 281 | |
| 282 | static struct xfrm_policy_afinfo xfrm6_policy_afinfo = { |
| 283 | .family = AF_INET6, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | .dst_ops = &xfrm6_dst_ops, |
| 285 | .dst_lookup = xfrm6_dst_lookup, |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 286 | .get_saddr = xfrm6_get_saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | .decode_session = _decode_session6, |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 288 | .get_tos = xfrm6_get_tos, |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 289 | .init_path = xfrm6_init_path, |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 290 | .fill_dst = xfrm6_fill_dst, |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 291 | .blackhole_route = ip6_blackhole_route, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | }; |
| 293 | |
Daniel Lezcano | 0013cab | 2007-12-07 00:42:11 -0800 | [diff] [blame] | 294 | static int __init xfrm6_policy_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | { |
Daniel Lezcano | 0013cab | 2007-12-07 00:42:11 -0800 | [diff] [blame] | 296 | return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | static void xfrm6_policy_fini(void) |
| 300 | { |
| 301 | xfrm_policy_unregister_afinfo(&xfrm6_policy_afinfo); |
| 302 | } |
| 303 | |
David S. Miller | db71789 | 2009-08-04 20:32:16 -0700 | [diff] [blame] | 304 | #ifdef CONFIG_SYSCTL |
Neil Horman | a44a4a0 | 2009-07-27 08:22:46 +0000 | [diff] [blame] | 305 | static struct ctl_table xfrm6_policy_table[] = { |
| 306 | { |
Neil Horman | a44a4a0 | 2009-07-27 08:22:46 +0000 | [diff] [blame] | 307 | .procname = "xfrm6_gc_thresh", |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 308 | .data = &init_net.xfrm.xfrm6_dst_ops.gc_thresh, |
Neil Horman | a44a4a0 | 2009-07-27 08:22:46 +0000 | [diff] [blame] | 309 | .maxlen = sizeof(int), |
| 310 | .mode = 0644, |
| 311 | .proc_handler = proc_dointvec, |
| 312 | }, |
| 313 | { } |
| 314 | }; |
| 315 | |
| 316 | static struct ctl_table_header *sysctl_hdr; |
David S. Miller | db71789 | 2009-08-04 20:32:16 -0700 | [diff] [blame] | 317 | #endif |
Neil Horman | a44a4a0 | 2009-07-27 08:22:46 +0000 | [diff] [blame] | 318 | |
Daniel Lezcano | 0013cab | 2007-12-07 00:42:11 -0800 | [diff] [blame] | 319 | int __init xfrm6_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | { |
Daniel Lezcano | 0013cab | 2007-12-07 00:42:11 -0800 | [diff] [blame] | 321 | int ret; |
Neil Horman | a33bc5c | 2009-07-30 18:52:15 -0700 | [diff] [blame] | 322 | unsigned int gc_thresh; |
Daniel Lezcano | 0013cab | 2007-12-07 00:42:11 -0800 | [diff] [blame] | 323 | |
Neil Horman | a33bc5c | 2009-07-30 18:52:15 -0700 | [diff] [blame] | 324 | /* |
| 325 | * We need a good default value for the xfrm6 gc threshold. |
| 326 | * In ipv4 we set it to the route hash table size * 8, which |
| 327 | * is half the size of the maximaum route cache for ipv4. It |
| 328 | * would be good to do the same thing for v6, except the table is |
| 329 | * constructed differently here. Here each table for a net namespace |
| 330 | * can have FIB_TABLE_HASHSZ entries, so lets go with the same |
| 331 | * computation that we used for ipv4 here. Also, lets keep the initial |
| 332 | * gc_thresh to a minimum of 1024, since, the ipv6 route cache defaults |
| 333 | * to that as a minimum as well |
| 334 | */ |
| 335 | gc_thresh = FIB6_TABLE_HASHSZ * 8; |
| 336 | xfrm6_dst_ops.gc_thresh = (gc_thresh < 1024) ? 1024 : gc_thresh; |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 337 | dst_entries_init(&xfrm6_dst_ops); |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 338 | |
| 339 | ret = xfrm6_policy_init(); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 340 | if (ret) { |
| 341 | dst_entries_destroy(&xfrm6_dst_ops); |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 342 | goto out; |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 343 | } |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 344 | ret = xfrm6_state_init(); |
| 345 | if (ret) |
| 346 | goto out_policy; |
| 347 | |
David S. Miller | db71789 | 2009-08-04 20:32:16 -0700 | [diff] [blame] | 348 | #ifdef CONFIG_SYSCTL |
Eric W. Biederman | ec8f23c | 2012-04-19 13:44:49 +0000 | [diff] [blame] | 349 | sysctl_hdr = register_net_sysctl(&init_net, "net/ipv6", |
| 350 | xfrm6_policy_table); |
David S. Miller | db71789 | 2009-08-04 20:32:16 -0700 | [diff] [blame] | 351 | #endif |
Daniel Lezcano | 0013cab | 2007-12-07 00:42:11 -0800 | [diff] [blame] | 352 | out: |
| 353 | return ret; |
| 354 | out_policy: |
| 355 | xfrm6_policy_fini(); |
| 356 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | void xfrm6_fini(void) |
| 360 | { |
David S. Miller | db71789 | 2009-08-04 20:32:16 -0700 | [diff] [blame] | 361 | #ifdef CONFIG_SYSCTL |
Neil Horman | a44a4a0 | 2009-07-27 08:22:46 +0000 | [diff] [blame] | 362 | if (sysctl_hdr) |
| 363 | unregister_net_sysctl_table(sysctl_hdr); |
David S. Miller | db71789 | 2009-08-04 20:32:16 -0700 | [diff] [blame] | 364 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | //xfrm6_input_fini(); |
| 366 | xfrm6_policy_fini(); |
| 367 | xfrm6_state_fini(); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 368 | dst_entries_destroy(&xfrm6_dst_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |