YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * xfrm4_policy.c |
| 3 | * |
| 4 | * Changes: |
| 5 | * Kazunori MIYAZAWA @USAGI |
| 6 | * YOSHIFUJI Hideaki @USAGI |
| 7 | * Split up af-specific portion |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | */ |
| 10 | |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 11 | #include <linux/err.h> |
| 12 | #include <linux/kernel.h> |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 13 | #include <linux/inetdevice.h> |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 14 | #include <linux/if_tunnel.h> |
Herbert Xu | 45ff5a3 | 2007-11-13 21:35:32 -0800 | [diff] [blame] | 15 | #include <net/dst.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <net/xfrm.h> |
| 17 | #include <net/ip.h> |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | static struct xfrm_policy_afinfo xfrm4_policy_afinfo; |
| 20 | |
David S. Miller | 8f01cb0 | 2011-05-09 15:13:28 -0700 | [diff] [blame] | 21 | static struct dst_entry *__xfrm4_dst_lookup(struct net *net, struct flowi4 *fl4, |
| 22 | int tos, |
| 23 | const xfrm_address_t *saddr, |
| 24 | const xfrm_address_t *daddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | { |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 26 | struct rtable *rt; |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 27 | |
David S. Miller | 8f01cb0 | 2011-05-09 15:13:28 -0700 | [diff] [blame] | 28 | memset(fl4, 0, sizeof(*fl4)); |
| 29 | fl4->daddr = daddr->a4; |
| 30 | fl4->flowi4_tos = tos; |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 31 | if (saddr) |
David S. Miller | 8f01cb0 | 2011-05-09 15:13:28 -0700 | [diff] [blame] | 32 | fl4->saddr = saddr->a4; |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 33 | |
David S. Miller | 8f01cb0 | 2011-05-09 15:13:28 -0700 | [diff] [blame] | 34 | rt = __ip_route_output_key(net, fl4); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 35 | if (!IS_ERR(rt)) |
| 36 | return &rt->dst; |
| 37 | |
| 38 | return ERR_CAST(rt); |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 39 | } |
| 40 | |
David S. Miller | 8f01cb0 | 2011-05-09 15:13:28 -0700 | [diff] [blame] | 41 | static struct dst_entry *xfrm4_dst_lookup(struct net *net, int tos, |
| 42 | const xfrm_address_t *saddr, |
| 43 | const xfrm_address_t *daddr) |
| 44 | { |
| 45 | struct flowi4 fl4; |
| 46 | |
| 47 | return __xfrm4_dst_lookup(net, &fl4, tos, saddr, daddr); |
| 48 | } |
| 49 | |
Alexey Dobriyan | fbda33b | 2008-11-25 17:56:49 -0800 | [diff] [blame] | 50 | static int xfrm4_get_saddr(struct net *net, |
| 51 | xfrm_address_t *saddr, xfrm_address_t *daddr) |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 52 | { |
| 53 | struct dst_entry *dst; |
David S. Miller | 8f01cb0 | 2011-05-09 15:13:28 -0700 | [diff] [blame] | 54 | struct flowi4 fl4; |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 55 | |
David S. Miller | 8f01cb0 | 2011-05-09 15:13:28 -0700 | [diff] [blame] | 56 | dst = __xfrm4_dst_lookup(net, &fl4, 0, NULL, daddr); |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 57 | if (IS_ERR(dst)) |
| 58 | return -EHOSTUNREACH; |
| 59 | |
David S. Miller | 8f01cb0 | 2011-05-09 15:13:28 -0700 | [diff] [blame] | 60 | saddr->a4 = fl4.saddr; |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 61 | dst_release(dst); |
| 62 | return 0; |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 63 | } |
| 64 | |
David S. Miller | 05d8402 | 2011-02-22 17:47:10 -0800 | [diff] [blame] | 65 | static int xfrm4_get_tos(const struct flowi *fl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 67 | return IPTOS_RT_MASK & fl->u.ip4.flowi4_tos; /* Strip ECN bits */ |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 68 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 70 | static int xfrm4_init_path(struct xfrm_dst *path, struct dst_entry *dst, |
| 71 | int nfheader_len) |
| 72 | { |
| 73 | return 0; |
| 74 | } |
| 75 | |
Herbert Xu | 87c1e12 | 2010-03-02 02:51:56 +0000 | [diff] [blame] | 76 | static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev, |
David S. Miller | 0c7b3ee | 2011-02-22 17:48:57 -0800 | [diff] [blame] | 77 | const struct flowi *fl) |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 78 | { |
| 79 | struct rtable *rt = (struct rtable *)xdst->route; |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 80 | const struct flowi4 *fl4 = &fl->u.ip4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Yan, Zheng | b732339 | 2011-10-22 21:58:20 +0000 | [diff] [blame] | 82 | xdst->u.rt.rt_iif = fl4->flowi4_iif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 84 | xdst->u.dst.dev = dev; |
| 85 | dev_hold(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 87 | /* Sheit... I remember I did this right. Apparently, |
| 88 | * it was magically lost, so this code needs audit */ |
David S. Miller | 9917e1e8 | 2012-07-17 14:44:26 -0700 | [diff] [blame] | 89 | xdst->u.rt.rt_is_input = rt->rt_is_input; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 90 | xdst->u.rt.rt_flags = rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST | |
| 91 | RTCF_LOCAL); |
| 92 | xdst->u.rt.rt_type = rt->rt_type; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 93 | xdst->u.rt.rt_gateway = rt->rt_gateway; |
Julian Anastasov | 155e833 | 2012-10-08 11:41:18 +0000 | [diff] [blame] | 94 | xdst->u.rt.rt_uses_gateway = rt->rt_uses_gateway; |
David S. Miller | 5943634 | 2012-07-10 06:58:42 -0700 | [diff] [blame] | 95 | xdst->u.rt.rt_pmtu = rt->rt_pmtu; |
David S. Miller | caacf05 | 2012-07-31 15:06:50 -0700 | [diff] [blame] | 96 | INIT_LIST_HEAD(&xdst->u.rt.rt_uncached); |
Miika Komu | 4337226 | 2007-02-06 14:27:32 -0800 | [diff] [blame] | 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | static void |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 102 | _decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 104 | const struct iphdr *iph = ip_hdr(skb); |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 105 | u8 *xprth = skb_network_header(skb) + iph->ihl * 4; |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 106 | struct flowi4 *fl4 = &fl->u.ip4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 108 | memset(fl4, 0, sizeof(struct flowi4)); |
| 109 | fl4->flowi4_mark = skb->mark; |
Steffen Klassert | bafd4bd | 2013-09-09 10:38:38 +0200 | [diff] [blame^] | 110 | fl4->flowi4_oif = skb_dst(skb)->dev->ifindex; |
Peter Kosyh | 44b451f | 2010-07-02 07:47:55 +0000 | [diff] [blame] | 111 | |
Paul Gortmaker | 56f8a75 | 2011-06-21 20:33:34 -0700 | [diff] [blame] | 112 | if (!ip_is_fragment(iph)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | switch (iph->protocol) { |
| 114 | case IPPROTO_UDP: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 115 | case IPPROTO_UDPLITE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | case IPPROTO_TCP: |
| 117 | case IPPROTO_SCTP: |
Patrick McHardy | 9e99999 | 2005-12-19 14:03:46 -0800 | [diff] [blame] | 118 | case IPPROTO_DCCP: |
Wei Yongjun | c615c9f | 2009-07-02 16:57:23 +0000 | [diff] [blame] | 119 | if (xprth + 4 < skb->data || |
| 120 | pskb_may_pull(skb, xprth + 4 - skb->data)) { |
Al Viro | 8c689a6 | 2006-11-08 00:20:21 -0800 | [diff] [blame] | 121 | __be16 *ports = (__be16 *)xprth; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
David S. Miller | 9cce96d | 2011-03-12 03:00:33 -0500 | [diff] [blame] | 123 | fl4->fl4_sport = ports[!!reverse]; |
| 124 | fl4->fl4_dport = ports[!reverse]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | } |
| 126 | break; |
| 127 | |
| 128 | case IPPROTO_ICMP: |
| 129 | if (pskb_may_pull(skb, xprth + 2 - skb->data)) { |
| 130 | u8 *icmp = xprth; |
| 131 | |
David S. Miller | 9cce96d | 2011-03-12 03:00:33 -0500 | [diff] [blame] | 132 | fl4->fl4_icmp_type = icmp[0]; |
| 133 | fl4->fl4_icmp_code = icmp[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
| 135 | break; |
| 136 | |
| 137 | case IPPROTO_ESP: |
| 138 | if (pskb_may_pull(skb, xprth + 4 - skb->data)) { |
Al Viro | 4324a17 | 2006-09-27 18:49:07 -0700 | [diff] [blame] | 139 | __be32 *ehdr = (__be32 *)xprth; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
David S. Miller | 9cce96d | 2011-03-12 03:00:33 -0500 | [diff] [blame] | 141 | fl4->fl4_ipsec_spi = ehdr[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
| 143 | break; |
| 144 | |
| 145 | case IPPROTO_AH: |
| 146 | if (pskb_may_pull(skb, xprth + 8 - skb->data)) { |
Daniel Baluta | 5e73ea1 | 2012-04-15 01:34:41 +0000 | [diff] [blame] | 147 | __be32 *ah_hdr = (__be32 *)xprth; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
David S. Miller | 9cce96d | 2011-03-12 03:00:33 -0500 | [diff] [blame] | 149 | fl4->fl4_ipsec_spi = ah_hdr[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | } |
| 151 | break; |
| 152 | |
| 153 | case IPPROTO_COMP: |
| 154 | if (pskb_may_pull(skb, xprth + 4 - skb->data)) { |
Al Viro | 4324a17 | 2006-09-27 18:49:07 -0700 | [diff] [blame] | 155 | __be16 *ipcomp_hdr = (__be16 *)xprth; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
David S. Miller | 9cce96d | 2011-03-12 03:00:33 -0500 | [diff] [blame] | 157 | fl4->fl4_ipsec_spi = htonl(ntohs(ipcomp_hdr[1])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | break; |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 160 | |
| 161 | case IPPROTO_GRE: |
| 162 | if (pskb_may_pull(skb, xprth + 12 - skb->data)) { |
| 163 | __be16 *greflags = (__be16 *)xprth; |
| 164 | __be32 *gre_hdr = (__be32 *)xprth; |
| 165 | |
| 166 | if (greflags[0] & GRE_KEY) { |
| 167 | if (greflags[0] & GRE_CSUM) |
| 168 | gre_hdr++; |
David S. Miller | 9cce96d | 2011-03-12 03:00:33 -0500 | [diff] [blame] | 169 | fl4->fl4_gre_key = gre_hdr[1]; |
Timo Teräs | cc9ff19 | 2010-11-03 04:41:38 +0000 | [diff] [blame] | 170 | } |
| 171 | } |
| 172 | break; |
| 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | default: |
David S. Miller | 9cce96d | 2011-03-12 03:00:33 -0500 | [diff] [blame] | 175 | fl4->fl4_ipsec_spi = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 179 | fl4->flowi4_proto = iph->protocol; |
| 180 | fl4->daddr = reverse ? iph->saddr : iph->daddr; |
| 181 | fl4->saddr = reverse ? iph->daddr : iph->saddr; |
| 182 | fl4->flowi4_tos = iph->tos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | } |
| 184 | |
Daniel Lezcano | 569d364 | 2008-01-18 03:56:57 -0800 | [diff] [blame] | 185 | static inline int xfrm4_garbage_collect(struct dst_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | { |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 187 | struct net *net = container_of(ops, struct net, xfrm.xfrm4_dst_ops); |
| 188 | |
| 189 | xfrm4_policy_afinfo.garbage_collect(net); |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 190 | return (dst_entries_get_slow(ops) > ops->gc_thresh * 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 193 | static void xfrm4_update_pmtu(struct dst_entry *dst, struct sock *sk, |
| 194 | struct sk_buff *skb, u32 mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
| 196 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 197 | struct dst_entry *path = xdst->route; |
| 198 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 199 | path->ops->update_pmtu(path, sk, skb, mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | } |
| 201 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 202 | static void xfrm4_redirect(struct dst_entry *dst, struct sock *sk, |
| 203 | struct sk_buff *skb) |
David S. Miller | 55be7a9 | 2012-07-11 21:27:49 -0700 | [diff] [blame] | 204 | { |
| 205 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 206 | struct dst_entry *path = xdst->route; |
| 207 | |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 208 | path->ops->redirect(path, sk, skb); |
David S. Miller | 55be7a9 | 2012-07-11 21:27:49 -0700 | [diff] [blame] | 209 | } |
| 210 | |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 211 | static void xfrm4_dst_destroy(struct dst_entry *dst) |
| 212 | { |
| 213 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 214 | |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 215 | dst_destroy_metrics_generic(dst); |
| 216 | |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 217 | xfrm_dst_destroy(xdst); |
| 218 | } |
| 219 | |
| 220 | static void xfrm4_dst_ifdown(struct dst_entry *dst, struct net_device *dev, |
| 221 | int unregister) |
| 222 | { |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 223 | if (!unregister) |
| 224 | return; |
| 225 | |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 226 | xfrm_dst_ifdown(dst, dev); |
| 227 | } |
| 228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | static struct dst_ops xfrm4_dst_ops = { |
| 230 | .family = AF_INET, |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 231 | .protocol = cpu_to_be16(ETH_P_IP), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | .gc = xfrm4_garbage_collect, |
| 233 | .update_pmtu = xfrm4_update_pmtu, |
David S. Miller | 55be7a9 | 2012-07-11 21:27:49 -0700 | [diff] [blame] | 234 | .redirect = xfrm4_redirect, |
David S. Miller | 62fa8a8 | 2011-01-26 20:51:05 -0800 | [diff] [blame] | 235 | .cow_metrics = dst_cow_metrics_generic, |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 236 | .destroy = xfrm4_dst_destroy, |
| 237 | .ifdown = xfrm4_dst_ifdown, |
Herbert Xu | 862b82c | 2007-11-13 21:43:11 -0800 | [diff] [blame] | 238 | .local_out = __ip_local_out, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | .gc_thresh = 1024, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | }; |
| 241 | |
| 242 | static struct xfrm_policy_afinfo xfrm4_policy_afinfo = { |
| 243 | .family = AF_INET, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | .dst_ops = &xfrm4_dst_ops, |
| 245 | .dst_lookup = xfrm4_dst_lookup, |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 246 | .get_saddr = xfrm4_get_saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | .decode_session = _decode_session4, |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 248 | .get_tos = xfrm4_get_tos, |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 249 | .init_path = xfrm4_init_path, |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 250 | .fill_dst = xfrm4_fill_dst, |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 251 | .blackhole_route = ipv4_blackhole_route, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | }; |
| 253 | |
Randy Dunlap | f816700 | 2009-08-04 20:18:33 -0700 | [diff] [blame] | 254 | #ifdef CONFIG_SYSCTL |
Neil Horman | a44a4a0 | 2009-07-27 08:22:46 +0000 | [diff] [blame] | 255 | static struct ctl_table xfrm4_policy_table[] = { |
| 256 | { |
Neil Horman | a44a4a0 | 2009-07-27 08:22:46 +0000 | [diff] [blame] | 257 | .procname = "xfrm4_gc_thresh", |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 258 | .data = &init_net.xfrm.xfrm4_dst_ops.gc_thresh, |
Neil Horman | a44a4a0 | 2009-07-27 08:22:46 +0000 | [diff] [blame] | 259 | .maxlen = sizeof(int), |
| 260 | .mode = 0644, |
| 261 | .proc_handler = proc_dointvec, |
| 262 | }, |
| 263 | { } |
| 264 | }; |
| 265 | |
Michal Kubecek | 8d06887 | 2013-02-06 10:46:33 +0100 | [diff] [blame] | 266 | static int __net_init xfrm4_net_init(struct net *net) |
| 267 | { |
| 268 | struct ctl_table *table; |
| 269 | struct ctl_table_header *hdr; |
| 270 | |
| 271 | table = xfrm4_policy_table; |
| 272 | if (!net_eq(net, &init_net)) { |
| 273 | table = kmemdup(table, sizeof(xfrm4_policy_table), GFP_KERNEL); |
| 274 | if (!table) |
| 275 | goto err_alloc; |
| 276 | |
| 277 | table[0].data = &net->xfrm.xfrm4_dst_ops.gc_thresh; |
| 278 | } |
| 279 | |
| 280 | hdr = register_net_sysctl(net, "net/ipv4", table); |
| 281 | if (!hdr) |
| 282 | goto err_reg; |
| 283 | |
| 284 | net->ipv4.xfrm4_hdr = hdr; |
| 285 | return 0; |
| 286 | |
| 287 | err_reg: |
| 288 | if (!net_eq(net, &init_net)) |
| 289 | kfree(table); |
| 290 | err_alloc: |
| 291 | return -ENOMEM; |
| 292 | } |
| 293 | |
| 294 | static void __net_exit xfrm4_net_exit(struct net *net) |
| 295 | { |
| 296 | struct ctl_table *table; |
| 297 | |
| 298 | if (net->ipv4.xfrm4_hdr == NULL) |
| 299 | return; |
| 300 | |
| 301 | table = net->ipv4.xfrm4_hdr->ctl_table_arg; |
| 302 | unregister_net_sysctl_table(net->ipv4.xfrm4_hdr); |
| 303 | if (!net_eq(net, &init_net)) |
| 304 | kfree(table); |
| 305 | } |
| 306 | |
| 307 | static struct pernet_operations __net_initdata xfrm4_net_ops = { |
| 308 | .init = xfrm4_net_init, |
| 309 | .exit = xfrm4_net_exit, |
| 310 | }; |
Randy Dunlap | f816700 | 2009-08-04 20:18:33 -0700 | [diff] [blame] | 311 | #endif |
Neil Horman | a44a4a0 | 2009-07-27 08:22:46 +0000 | [diff] [blame] | 312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | static void __init xfrm4_policy_init(void) |
| 314 | { |
| 315 | xfrm_policy_register_afinfo(&xfrm4_policy_afinfo); |
| 316 | } |
| 317 | |
Steffen Klassert | 703fb94 | 2012-11-13 08:52:24 +0100 | [diff] [blame] | 318 | void __init xfrm4_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | { |
Eric Dumazet | fc66f95 | 2010-10-08 06:37:34 +0000 | [diff] [blame] | 320 | dst_entries_init(&xfrm4_dst_ops); |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 321 | |
| 322 | xfrm4_state_init(); |
| 323 | xfrm4_policy_init(); |
Randy Dunlap | f816700 | 2009-08-04 20:18:33 -0700 | [diff] [blame] | 324 | #ifdef CONFIG_SYSCTL |
Michal Kubecek | 8d06887 | 2013-02-06 10:46:33 +0100 | [diff] [blame] | 325 | register_pernet_subsys(&xfrm4_net_ops); |
Randy Dunlap | f816700 | 2009-08-04 20:18:33 -0700 | [diff] [blame] | 326 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
| 328 | |