YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * xfrm_policy.c |
| 3 | * |
| 4 | * Changes: |
| 5 | * Mitsuru KANDA @USAGI |
| 6 | * Kazunori MIYAZAWA @USAGI |
| 7 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> |
| 8 | * IPv6 support |
| 9 | * Kazunori MIYAZAWA @USAGI |
| 10 | * YOSHIFUJI Hideaki |
| 11 | * Split up af-specific portion |
| 12 | * Derek Atkins <derek@ihtfp.com> Add the post_input processor |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 13 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | */ |
| 15 | |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 16 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/slab.h> |
| 18 | #include <linux/kmod.h> |
| 19 | #include <linux/list.h> |
| 20 | #include <linux/spinlock.h> |
| 21 | #include <linux/workqueue.h> |
| 22 | #include <linux/notifier.h> |
| 23 | #include <linux/netdevice.h> |
Patrick McHardy | eb9c7eb | 2006-01-06 23:06:30 -0800 | [diff] [blame] | 24 | #include <linux/netfilter.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/module.h> |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 26 | #include <linux/cache.h> |
Paul Moore | 68277ac | 2007-12-20 20:49:33 -0800 | [diff] [blame] | 27 | #include <linux/audit.h> |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 28 | #include <net/dst.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <net/xfrm.h> |
| 30 | #include <net/ip.h> |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 31 | #ifdef CONFIG_XFRM_STATISTICS |
| 32 | #include <net/snmp.h> |
| 33 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
David S. Miller | 44e36b4 | 2006-08-24 04:50:50 -0700 | [diff] [blame] | 35 | #include "xfrm_hash.h" |
| 36 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 37 | DEFINE_MUTEX(xfrm_cfg_mutex); |
| 38 | EXPORT_SYMBOL(xfrm_cfg_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 40 | static DEFINE_SPINLOCK(xfrm_policy_sk_bundle_lock); |
| 41 | static struct dst_entry *xfrm_policy_sk_bundles; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | static DEFINE_RWLOCK(xfrm_policy_lock); |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | static DEFINE_RWLOCK(xfrm_policy_afinfo_lock); |
| 45 | static struct xfrm_policy_afinfo *xfrm_policy_afinfo[NPROTO]; |
| 46 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 47 | static struct kmem_cache *xfrm_dst_cache __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | static struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family); |
| 50 | static void xfrm_policy_put_afinfo(struct xfrm_policy_afinfo *afinfo); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 51 | static void xfrm_init_pmtu(struct dst_entry *dst); |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 52 | static int stale_bundle(struct dst_entry *dst); |
Steffen Klassert | 12fdb4d | 2011-06-29 23:18:20 +0000 | [diff] [blame] | 53 | static int xfrm_bundle_ok(struct xfrm_dst *xdst); |
stephen hemminger | 1c4c40c | 2010-10-15 05:14:19 +0000 | [diff] [blame] | 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Wei Yongjun | 29fa0b30 | 2008-12-03 00:33:09 -0800 | [diff] [blame] | 56 | static struct xfrm_policy *__xfrm_policy_unlink(struct xfrm_policy *pol, |
| 57 | int dir); |
| 58 | |
Andrew Morton | 7768102 | 2006-11-08 22:46:26 -0800 | [diff] [blame] | 59 | static inline int |
David S. Miller | 200ce96 | 2011-02-24 00:12:25 -0500 | [diff] [blame] | 60 | __xfrm4_selector_match(const struct xfrm_selector *sel, const struct flowi *fl) |
Andrew Morton | 7768102 | 2006-11-08 22:46:26 -0800 | [diff] [blame] | 61 | { |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 62 | const struct flowi4 *fl4 = &fl->u.ip4; |
| 63 | |
| 64 | return addr_match(&fl4->daddr, &sel->daddr, sel->prefixlen_d) && |
| 65 | addr_match(&fl4->saddr, &sel->saddr, sel->prefixlen_s) && |
| 66 | !((xfrm_flowi_dport(fl, &fl4->uli) ^ sel->dport) & sel->dport_mask) && |
| 67 | !((xfrm_flowi_sport(fl, &fl4->uli) ^ sel->sport) & sel->sport_mask) && |
| 68 | (fl4->flowi4_proto == sel->proto || !sel->proto) && |
| 69 | (fl4->flowi4_oif == sel->ifindex || !sel->ifindex); |
Andrew Morton | 7768102 | 2006-11-08 22:46:26 -0800 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | static inline int |
David S. Miller | 200ce96 | 2011-02-24 00:12:25 -0500 | [diff] [blame] | 73 | __xfrm6_selector_match(const struct xfrm_selector *sel, const struct flowi *fl) |
Andrew Morton | 7768102 | 2006-11-08 22:46:26 -0800 | [diff] [blame] | 74 | { |
David S. Miller | 7e1dc7b | 2011-03-12 02:42:11 -0500 | [diff] [blame] | 75 | const struct flowi6 *fl6 = &fl->u.ip6; |
| 76 | |
| 77 | return addr_match(&fl6->daddr, &sel->daddr, sel->prefixlen_d) && |
| 78 | addr_match(&fl6->saddr, &sel->saddr, sel->prefixlen_s) && |
| 79 | !((xfrm_flowi_dport(fl, &fl6->uli) ^ sel->dport) & sel->dport_mask) && |
| 80 | !((xfrm_flowi_sport(fl, &fl6->uli) ^ sel->sport) & sel->sport_mask) && |
| 81 | (fl6->flowi6_proto == sel->proto || !sel->proto) && |
| 82 | (fl6->flowi6_oif == sel->ifindex || !sel->ifindex); |
Andrew Morton | 7768102 | 2006-11-08 22:46:26 -0800 | [diff] [blame] | 83 | } |
| 84 | |
David S. Miller | 200ce96 | 2011-02-24 00:12:25 -0500 | [diff] [blame] | 85 | int xfrm_selector_match(const struct xfrm_selector *sel, const struct flowi *fl, |
David S. Miller | e1ad2ab | 2011-02-22 18:07:39 -0800 | [diff] [blame] | 86 | unsigned short family) |
Andrew Morton | 7768102 | 2006-11-08 22:46:26 -0800 | [diff] [blame] | 87 | { |
| 88 | switch (family) { |
| 89 | case AF_INET: |
| 90 | return __xfrm4_selector_match(sel, fl); |
| 91 | case AF_INET6: |
| 92 | return __xfrm6_selector_match(sel, fl); |
| 93 | } |
| 94 | return 0; |
| 95 | } |
| 96 | |
Alexey Dobriyan | c5b3cf4 | 2008-11-25 17:51:25 -0800 | [diff] [blame] | 97 | static inline struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, |
David S. Miller | 6418c4e | 2011-02-24 00:16:53 -0500 | [diff] [blame] | 98 | const xfrm_address_t *saddr, |
| 99 | const xfrm_address_t *daddr, |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 100 | int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | { |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 102 | struct xfrm_policy_afinfo *afinfo; |
| 103 | struct dst_entry *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 105 | afinfo = xfrm_policy_get_afinfo(family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | if (unlikely(afinfo == NULL)) |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 107 | return ERR_PTR(-EAFNOSUPPORT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
Alexey Dobriyan | c5b3cf4 | 2008-11-25 17:51:25 -0800 | [diff] [blame] | 109 | dst = afinfo->dst_lookup(net, tos, saddr, daddr); |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | xfrm_policy_put_afinfo(afinfo); |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 112 | |
| 113 | return dst; |
| 114 | } |
| 115 | |
| 116 | static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos, |
| 117 | xfrm_address_t *prev_saddr, |
| 118 | xfrm_address_t *prev_daddr, |
| 119 | int family) |
| 120 | { |
Alexey Dobriyan | c5b3cf4 | 2008-11-25 17:51:25 -0800 | [diff] [blame] | 121 | struct net *net = xs_net(x); |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 122 | xfrm_address_t *saddr = &x->props.saddr; |
| 123 | xfrm_address_t *daddr = &x->id.daddr; |
| 124 | struct dst_entry *dst; |
| 125 | |
| 126 | if (x->type->flags & XFRM_TYPE_LOCAL_COADDR) { |
| 127 | saddr = x->coaddr; |
| 128 | daddr = prev_daddr; |
| 129 | } |
| 130 | if (x->type->flags & XFRM_TYPE_REMOTE_COADDR) { |
| 131 | saddr = prev_saddr; |
| 132 | daddr = x->coaddr; |
| 133 | } |
| 134 | |
Alexey Dobriyan | c5b3cf4 | 2008-11-25 17:51:25 -0800 | [diff] [blame] | 135 | dst = __xfrm_dst_lookup(net, tos, saddr, daddr, family); |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 136 | |
| 137 | if (!IS_ERR(dst)) { |
| 138 | if (prev_saddr != saddr) |
| 139 | memcpy(prev_saddr, saddr, sizeof(*prev_saddr)); |
| 140 | if (prev_daddr != daddr) |
| 141 | memcpy(prev_daddr, daddr, sizeof(*prev_daddr)); |
| 142 | } |
| 143 | |
Herbert Xu | 66cdb3c | 2007-11-13 21:37:28 -0800 | [diff] [blame] | 144 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | static inline unsigned long make_jiffies(long secs) |
| 148 | { |
| 149 | if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) |
| 150 | return MAX_SCHEDULE_TIMEOUT-1; |
| 151 | else |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 152 | return secs*HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | static void xfrm_policy_timer(unsigned long data) |
| 156 | { |
| 157 | struct xfrm_policy *xp = (struct xfrm_policy*)data; |
James Morris | 9d729f7 | 2007-03-04 16:12:44 -0800 | [diff] [blame] | 158 | unsigned long now = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | long next = LONG_MAX; |
| 160 | int warn = 0; |
| 161 | int dir; |
| 162 | |
| 163 | read_lock(&xp->lock); |
| 164 | |
Timo Teräs | ea2dea9 | 2010-03-31 00:17:05 +0000 | [diff] [blame] | 165 | if (unlikely(xp->walk.dead)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | goto out; |
| 167 | |
Herbert Xu | 77d8d7a | 2005-10-05 12:15:12 -0700 | [diff] [blame] | 168 | dir = xfrm_policy_id2dir(xp->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | if (xp->lft.hard_add_expires_seconds) { |
| 171 | long tmo = xp->lft.hard_add_expires_seconds + |
| 172 | xp->curlft.add_time - now; |
| 173 | if (tmo <= 0) |
| 174 | goto expired; |
| 175 | if (tmo < next) |
| 176 | next = tmo; |
| 177 | } |
| 178 | if (xp->lft.hard_use_expires_seconds) { |
| 179 | long tmo = xp->lft.hard_use_expires_seconds + |
| 180 | (xp->curlft.use_time ? : xp->curlft.add_time) - now; |
| 181 | if (tmo <= 0) |
| 182 | goto expired; |
| 183 | if (tmo < next) |
| 184 | next = tmo; |
| 185 | } |
| 186 | if (xp->lft.soft_add_expires_seconds) { |
| 187 | long tmo = xp->lft.soft_add_expires_seconds + |
| 188 | xp->curlft.add_time - now; |
| 189 | if (tmo <= 0) { |
| 190 | warn = 1; |
| 191 | tmo = XFRM_KM_TIMEOUT; |
| 192 | } |
| 193 | if (tmo < next) |
| 194 | next = tmo; |
| 195 | } |
| 196 | if (xp->lft.soft_use_expires_seconds) { |
| 197 | long tmo = xp->lft.soft_use_expires_seconds + |
| 198 | (xp->curlft.use_time ? : xp->curlft.add_time) - now; |
| 199 | if (tmo <= 0) { |
| 200 | warn = 1; |
| 201 | tmo = XFRM_KM_TIMEOUT; |
| 202 | } |
| 203 | if (tmo < next) |
| 204 | next = tmo; |
| 205 | } |
| 206 | |
| 207 | if (warn) |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 208 | km_policy_expired(xp, dir, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | if (next != LONG_MAX && |
| 210 | !mod_timer(&xp->timer, jiffies + make_jiffies(next))) |
| 211 | xfrm_pol_hold(xp); |
| 212 | |
| 213 | out: |
| 214 | read_unlock(&xp->lock); |
| 215 | xfrm_pol_put(xp); |
| 216 | return; |
| 217 | |
| 218 | expired: |
| 219 | read_unlock(&xp->lock); |
Herbert Xu | 4666faa | 2005-06-18 22:43:22 -0700 | [diff] [blame] | 220 | if (!xfrm_policy_delete(xp, dir)) |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 221 | km_policy_expired(xp, dir, 1, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | xfrm_pol_put(xp); |
| 223 | } |
| 224 | |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 225 | static struct flow_cache_object *xfrm_policy_flo_get(struct flow_cache_object *flo) |
| 226 | { |
| 227 | struct xfrm_policy *pol = container_of(flo, struct xfrm_policy, flo); |
| 228 | |
| 229 | if (unlikely(pol->walk.dead)) |
| 230 | flo = NULL; |
| 231 | else |
| 232 | xfrm_pol_hold(pol); |
| 233 | |
| 234 | return flo; |
| 235 | } |
| 236 | |
| 237 | static int xfrm_policy_flo_check(struct flow_cache_object *flo) |
| 238 | { |
| 239 | struct xfrm_policy *pol = container_of(flo, struct xfrm_policy, flo); |
| 240 | |
| 241 | return !pol->walk.dead; |
| 242 | } |
| 243 | |
| 244 | static void xfrm_policy_flo_delete(struct flow_cache_object *flo) |
| 245 | { |
| 246 | xfrm_pol_put(container_of(flo, struct xfrm_policy, flo)); |
| 247 | } |
| 248 | |
| 249 | static const struct flow_cache_ops xfrm_policy_fc_ops = { |
| 250 | .get = xfrm_policy_flo_get, |
| 251 | .check = xfrm_policy_flo_check, |
| 252 | .delete = xfrm_policy_flo_delete, |
| 253 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
| 255 | /* Allocate xfrm_policy. Not used here, it is supposed to be used by pfkeyv2 |
| 256 | * SPD calls. |
| 257 | */ |
| 258 | |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 259 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | { |
| 261 | struct xfrm_policy *policy; |
| 262 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 263 | policy = kzalloc(sizeof(struct xfrm_policy), gfp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
| 265 | if (policy) { |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 266 | write_pnet(&policy->xp_net, net); |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 267 | INIT_LIST_HEAD(&policy->walk.all); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 268 | INIT_HLIST_NODE(&policy->bydst); |
| 269 | INIT_HLIST_NODE(&policy->byidx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | rwlock_init(&policy->lock); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 271 | atomic_set(&policy->refcnt, 1); |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 272 | setup_timer(&policy->timer, xfrm_policy_timer, |
| 273 | (unsigned long)policy); |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 274 | policy->flo.ops = &xfrm_policy_fc_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | return policy; |
| 277 | } |
| 278 | EXPORT_SYMBOL(xfrm_policy_alloc); |
| 279 | |
| 280 | /* Destroy xfrm_policy: descendant resources must be released to this moment. */ |
| 281 | |
WANG Cong | 64c31b3 | 2008-01-07 22:34:29 -0800 | [diff] [blame] | 282 | void xfrm_policy_destroy(struct xfrm_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | { |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 284 | BUG_ON(!policy->walk.dead); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | if (del_timer(&policy->timer)) |
| 287 | BUG(); |
| 288 | |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 289 | security_xfrm_policy_free(policy->security); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | kfree(policy); |
| 291 | } |
WANG Cong | 64c31b3 | 2008-01-07 22:34:29 -0800 | [diff] [blame] | 292 | EXPORT_SYMBOL(xfrm_policy_destroy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | /* Rule must be locked. Release descentant resources, announce |
| 295 | * entry dead. The rule must be unlinked from lists to the moment. |
| 296 | */ |
| 297 | |
| 298 | static void xfrm_policy_kill(struct xfrm_policy *policy) |
| 299 | { |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 300 | policy->walk.dead = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Timo Teräs | 285ead1 | 2010-04-07 00:30:06 +0000 | [diff] [blame] | 302 | atomic_inc(&policy->genid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
Timo Teräs | 285ead1 | 2010-04-07 00:30:06 +0000 | [diff] [blame] | 304 | if (del_timer(&policy->timer)) |
| 305 | xfrm_pol_put(policy); |
| 306 | |
| 307 | xfrm_pol_put(policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 310 | static unsigned int xfrm_policy_hashmax __read_mostly = 1 * 1024 * 1024; |
| 311 | |
Alexey Dobriyan | e92303f | 2008-11-25 17:32:41 -0800 | [diff] [blame] | 312 | static inline unsigned int idx_hash(struct net *net, u32 index) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 313 | { |
Alexey Dobriyan | e92303f | 2008-11-25 17:32:41 -0800 | [diff] [blame] | 314 | return __idx_hash(index, net->xfrm.policy_idx_hmask); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 315 | } |
| 316 | |
David S. Miller | 5f803b5 | 2011-02-24 00:33:19 -0500 | [diff] [blame] | 317 | static struct hlist_head *policy_hash_bysel(struct net *net, |
| 318 | const struct xfrm_selector *sel, |
| 319 | unsigned short family, int dir) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 320 | { |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 321 | unsigned int hmask = net->xfrm.policy_bydst[dir].hmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 322 | unsigned int hash = __sel_hash(sel, family, hmask); |
| 323 | |
| 324 | return (hash == hmask + 1 ? |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 325 | &net->xfrm.policy_inexact[dir] : |
| 326 | net->xfrm.policy_bydst[dir].table + hash); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 327 | } |
| 328 | |
David S. Miller | 5f803b5 | 2011-02-24 00:33:19 -0500 | [diff] [blame] | 329 | static struct hlist_head *policy_hash_direct(struct net *net, |
| 330 | const xfrm_address_t *daddr, |
| 331 | const xfrm_address_t *saddr, |
| 332 | unsigned short family, int dir) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 333 | { |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 334 | unsigned int hmask = net->xfrm.policy_bydst[dir].hmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 335 | unsigned int hash = __addr_hash(daddr, saddr, family, hmask); |
| 336 | |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 337 | return net->xfrm.policy_bydst[dir].table + hash; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 338 | } |
| 339 | |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 340 | static void xfrm_dst_hash_transfer(struct hlist_head *list, |
| 341 | struct hlist_head *ndsttable, |
| 342 | unsigned int nhashmask) |
| 343 | { |
YOSHIFUJI Hideaki | b791160 | 2008-02-17 23:29:30 -0800 | [diff] [blame] | 344 | struct hlist_node *entry, *tmp, *entry0 = NULL; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 345 | struct xfrm_policy *pol; |
YOSHIFUJI Hideaki | b791160 | 2008-02-17 23:29:30 -0800 | [diff] [blame] | 346 | unsigned int h0 = 0; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 347 | |
YOSHIFUJI Hideaki | b791160 | 2008-02-17 23:29:30 -0800 | [diff] [blame] | 348 | redo: |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 349 | hlist_for_each_entry_safe(pol, entry, tmp, list, bydst) { |
| 350 | unsigned int h; |
| 351 | |
| 352 | h = __addr_hash(&pol->selector.daddr, &pol->selector.saddr, |
| 353 | pol->family, nhashmask); |
YOSHIFUJI Hideaki | b791160 | 2008-02-17 23:29:30 -0800 | [diff] [blame] | 354 | if (!entry0) { |
| 355 | hlist_del(entry); |
| 356 | hlist_add_head(&pol->bydst, ndsttable+h); |
| 357 | h0 = h; |
| 358 | } else { |
| 359 | if (h != h0) |
| 360 | continue; |
| 361 | hlist_del(entry); |
| 362 | hlist_add_after(entry0, &pol->bydst); |
| 363 | } |
| 364 | entry0 = entry; |
| 365 | } |
| 366 | if (!hlist_empty(list)) { |
| 367 | entry0 = NULL; |
| 368 | goto redo; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 369 | } |
| 370 | } |
| 371 | |
| 372 | static void xfrm_idx_hash_transfer(struct hlist_head *list, |
| 373 | struct hlist_head *nidxtable, |
| 374 | unsigned int nhashmask) |
| 375 | { |
| 376 | struct hlist_node *entry, *tmp; |
| 377 | struct xfrm_policy *pol; |
| 378 | |
| 379 | hlist_for_each_entry_safe(pol, entry, tmp, list, byidx) { |
| 380 | unsigned int h; |
| 381 | |
| 382 | h = __idx_hash(pol->index, nhashmask); |
| 383 | hlist_add_head(&pol->byidx, nidxtable+h); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | static unsigned long xfrm_new_hash_mask(unsigned int old_hmask) |
| 388 | { |
| 389 | return ((old_hmask + 1) << 1) - 1; |
| 390 | } |
| 391 | |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 392 | static void xfrm_bydst_resize(struct net *net, int dir) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 393 | { |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 394 | unsigned int hmask = net->xfrm.policy_bydst[dir].hmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 395 | unsigned int nhashmask = xfrm_new_hash_mask(hmask); |
| 396 | unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head); |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 397 | struct hlist_head *odst = net->xfrm.policy_bydst[dir].table; |
David S. Miller | 44e36b4 | 2006-08-24 04:50:50 -0700 | [diff] [blame] | 398 | struct hlist_head *ndst = xfrm_hash_alloc(nsize); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 399 | int i; |
| 400 | |
| 401 | if (!ndst) |
| 402 | return; |
| 403 | |
| 404 | write_lock_bh(&xfrm_policy_lock); |
| 405 | |
| 406 | for (i = hmask; i >= 0; i--) |
| 407 | xfrm_dst_hash_transfer(odst + i, ndst, nhashmask); |
| 408 | |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 409 | net->xfrm.policy_bydst[dir].table = ndst; |
| 410 | net->xfrm.policy_bydst[dir].hmask = nhashmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 411 | |
| 412 | write_unlock_bh(&xfrm_policy_lock); |
| 413 | |
David S. Miller | 44e36b4 | 2006-08-24 04:50:50 -0700 | [diff] [blame] | 414 | xfrm_hash_free(odst, (hmask + 1) * sizeof(struct hlist_head)); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 415 | } |
| 416 | |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 417 | static void xfrm_byidx_resize(struct net *net, int total) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 418 | { |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 419 | unsigned int hmask = net->xfrm.policy_idx_hmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 420 | unsigned int nhashmask = xfrm_new_hash_mask(hmask); |
| 421 | unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head); |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 422 | struct hlist_head *oidx = net->xfrm.policy_byidx; |
David S. Miller | 44e36b4 | 2006-08-24 04:50:50 -0700 | [diff] [blame] | 423 | struct hlist_head *nidx = xfrm_hash_alloc(nsize); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 424 | int i; |
| 425 | |
| 426 | if (!nidx) |
| 427 | return; |
| 428 | |
| 429 | write_lock_bh(&xfrm_policy_lock); |
| 430 | |
| 431 | for (i = hmask; i >= 0; i--) |
| 432 | xfrm_idx_hash_transfer(oidx + i, nidx, nhashmask); |
| 433 | |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 434 | net->xfrm.policy_byidx = nidx; |
| 435 | net->xfrm.policy_idx_hmask = nhashmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 436 | |
| 437 | write_unlock_bh(&xfrm_policy_lock); |
| 438 | |
David S. Miller | 44e36b4 | 2006-08-24 04:50:50 -0700 | [diff] [blame] | 439 | xfrm_hash_free(oidx, (hmask + 1) * sizeof(struct hlist_head)); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 440 | } |
| 441 | |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 442 | static inline int xfrm_bydst_should_resize(struct net *net, int dir, int *total) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 443 | { |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 444 | unsigned int cnt = net->xfrm.policy_count[dir]; |
| 445 | unsigned int hmask = net->xfrm.policy_bydst[dir].hmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 446 | |
| 447 | if (total) |
| 448 | *total += cnt; |
| 449 | |
| 450 | if ((hmask + 1) < xfrm_policy_hashmax && |
| 451 | cnt > hmask) |
| 452 | return 1; |
| 453 | |
| 454 | return 0; |
| 455 | } |
| 456 | |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 457 | static inline int xfrm_byidx_should_resize(struct net *net, int total) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 458 | { |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 459 | unsigned int hmask = net->xfrm.policy_idx_hmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 460 | |
| 461 | if ((hmask + 1) < xfrm_policy_hashmax && |
| 462 | total > hmask) |
| 463 | return 1; |
| 464 | |
| 465 | return 0; |
| 466 | } |
| 467 | |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 468 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si) |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 469 | { |
| 470 | read_lock_bh(&xfrm_policy_lock); |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 471 | si->incnt = net->xfrm.policy_count[XFRM_POLICY_IN]; |
| 472 | si->outcnt = net->xfrm.policy_count[XFRM_POLICY_OUT]; |
| 473 | si->fwdcnt = net->xfrm.policy_count[XFRM_POLICY_FWD]; |
| 474 | si->inscnt = net->xfrm.policy_count[XFRM_POLICY_IN+XFRM_POLICY_MAX]; |
| 475 | si->outscnt = net->xfrm.policy_count[XFRM_POLICY_OUT+XFRM_POLICY_MAX]; |
| 476 | si->fwdscnt = net->xfrm.policy_count[XFRM_POLICY_FWD+XFRM_POLICY_MAX]; |
| 477 | si->spdhcnt = net->xfrm.policy_idx_hmask; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 478 | si->spdhmcnt = xfrm_policy_hashmax; |
| 479 | read_unlock_bh(&xfrm_policy_lock); |
| 480 | } |
| 481 | EXPORT_SYMBOL(xfrm_spd_getinfo); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 482 | |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 483 | static DEFINE_MUTEX(hash_resize_mutex); |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 484 | static void xfrm_hash_resize(struct work_struct *work) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 485 | { |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 486 | struct net *net = container_of(work, struct net, xfrm.policy_hash_work); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 487 | int dir, total; |
| 488 | |
| 489 | mutex_lock(&hash_resize_mutex); |
| 490 | |
| 491 | total = 0; |
| 492 | for (dir = 0; dir < XFRM_POLICY_MAX * 2; dir++) { |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 493 | if (xfrm_bydst_should_resize(net, dir, &total)) |
| 494 | xfrm_bydst_resize(net, dir); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 495 | } |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 496 | if (xfrm_byidx_should_resize(net, total)) |
| 497 | xfrm_byidx_resize(net, total); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 498 | |
| 499 | mutex_unlock(&hash_resize_mutex); |
| 500 | } |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | /* Generate new index... KAME seems to generate them ordered by cost |
| 503 | * of an absolute inpredictability of ordering of rules. This will not pass. */ |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 504 | static u32 xfrm_gen_index(struct net *net, int dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | static u32 idx_generator; |
| 507 | |
| 508 | for (;;) { |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 509 | struct hlist_node *entry; |
| 510 | struct hlist_head *list; |
| 511 | struct xfrm_policy *p; |
| 512 | u32 idx; |
| 513 | int found; |
| 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | idx = (idx_generator | dir); |
| 516 | idx_generator += 8; |
| 517 | if (idx == 0) |
| 518 | idx = 8; |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 519 | list = net->xfrm.policy_byidx + idx_hash(net, idx); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 520 | found = 0; |
| 521 | hlist_for_each_entry(p, entry, list, byidx) { |
| 522 | if (p->index == idx) { |
| 523 | found = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | break; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 525 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | } |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 527 | if (!found) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | return idx; |
| 529 | } |
| 530 | } |
| 531 | |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 532 | static inline int selector_cmp(struct xfrm_selector *s1, struct xfrm_selector *s2) |
| 533 | { |
| 534 | u32 *p1 = (u32 *) s1; |
| 535 | u32 *p2 = (u32 *) s2; |
| 536 | int len = sizeof(struct xfrm_selector) / sizeof(u32); |
| 537 | int i; |
| 538 | |
| 539 | for (i = 0; i < len; i++) { |
| 540 | if (p1[i] != p2[i]) |
| 541 | return 1; |
| 542 | } |
| 543 | |
| 544 | return 0; |
| 545 | } |
| 546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl) |
| 548 | { |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 549 | struct net *net = xp_net(policy); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 550 | struct xfrm_policy *pol; |
| 551 | struct xfrm_policy *delpol; |
| 552 | struct hlist_head *chain; |
Herbert Xu | a6c7ab5 | 2007-01-16 16:52:02 -0800 | [diff] [blame] | 553 | struct hlist_node *entry, *newpos; |
Jamal Hadi Salim | 34f8d88 | 2010-02-22 11:32:58 +0000 | [diff] [blame] | 554 | u32 mark = policy->mark.v & policy->mark.m; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
| 556 | write_lock_bh(&xfrm_policy_lock); |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 557 | chain = policy_hash_bysel(net, &policy->selector, policy->family, dir); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 558 | delpol = NULL; |
| 559 | newpos = NULL; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 560 | hlist_for_each_entry(pol, entry, chain, bydst) { |
Herbert Xu | a6c7ab5 | 2007-01-16 16:52:02 -0800 | [diff] [blame] | 561 | if (pol->type == policy->type && |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 562 | !selector_cmp(&pol->selector, &policy->selector) && |
Jamal Hadi Salim | 34f8d88 | 2010-02-22 11:32:58 +0000 | [diff] [blame] | 563 | (mark & pol->mark.m) == pol->mark.v && |
Herbert Xu | a6c7ab5 | 2007-01-16 16:52:02 -0800 | [diff] [blame] | 564 | xfrm_sec_ctx_match(pol->security, policy->security) && |
| 565 | !WARN_ON(delpol)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | if (excl) { |
| 567 | write_unlock_bh(&xfrm_policy_lock); |
| 568 | return -EEXIST; |
| 569 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | delpol = pol; |
| 571 | if (policy->priority > pol->priority) |
| 572 | continue; |
| 573 | } else if (policy->priority >= pol->priority) { |
Herbert Xu | a6c7ab5 | 2007-01-16 16:52:02 -0800 | [diff] [blame] | 574 | newpos = &pol->bydst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | continue; |
| 576 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | if (delpol) |
| 578 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | } |
| 580 | if (newpos) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 581 | hlist_add_after(newpos, &policy->bydst); |
| 582 | else |
| 583 | hlist_add_head(&policy->bydst, chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | xfrm_pol_hold(policy); |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 585 | net->xfrm.policy_count[dir]++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | atomic_inc(&flow_cache_genid); |
Wei Yongjun | 29fa0b30 | 2008-12-03 00:33:09 -0800 | [diff] [blame] | 587 | if (delpol) |
| 588 | __xfrm_policy_unlink(delpol, dir); |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 589 | policy->index = delpol ? delpol->index : xfrm_gen_index(net, dir); |
| 590 | hlist_add_head(&policy->byidx, net->xfrm.policy_byidx+idx_hash(net, policy->index)); |
James Morris | 9d729f7 | 2007-03-04 16:12:44 -0800 | [diff] [blame] | 591 | policy->curlft.add_time = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | policy->curlft.use_time = 0; |
| 593 | if (!mod_timer(&policy->timer, jiffies + HZ)) |
| 594 | xfrm_pol_hold(policy); |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 595 | list_add(&policy->walk.all, &net->xfrm.policy_all); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | write_unlock_bh(&xfrm_policy_lock); |
| 597 | |
David S. Miller | 9b78a82 | 2005-12-22 07:39:48 -0800 | [diff] [blame] | 598 | if (delpol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | xfrm_policy_kill(delpol); |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 600 | else if (xfrm_bydst_should_resize(net, dir, NULL)) |
| 601 | schedule_work(&net->xfrm.policy_hash_work); |
David S. Miller | 9b78a82 | 2005-12-22 07:39:48 -0800 | [diff] [blame] | 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | return 0; |
| 604 | } |
| 605 | EXPORT_SYMBOL(xfrm_policy_insert); |
| 606 | |
Jamal Hadi Salim | 8ca2e93 | 2010-02-22 11:32:57 +0000 | [diff] [blame] | 607 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u8 type, |
| 608 | int dir, struct xfrm_selector *sel, |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 609 | struct xfrm_sec_ctx *ctx, int delete, |
| 610 | int *err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | { |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 612 | struct xfrm_policy *pol, *ret; |
| 613 | struct hlist_head *chain; |
| 614 | struct hlist_node *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 616 | *err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | write_lock_bh(&xfrm_policy_lock); |
Alexey Dobriyan | 8d1211a | 2008-11-25 17:34:20 -0800 | [diff] [blame] | 618 | chain = policy_hash_bysel(net, sel, sel->family, dir); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 619 | ret = NULL; |
| 620 | hlist_for_each_entry(pol, entry, chain, bydst) { |
| 621 | if (pol->type == type && |
Jamal Hadi Salim | 34f8d88 | 2010-02-22 11:32:58 +0000 | [diff] [blame] | 622 | (mark & pol->mark.m) == pol->mark.v && |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 623 | !selector_cmp(sel, &pol->selector) && |
| 624 | xfrm_sec_ctx_match(ctx, pol->security)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | xfrm_pol_hold(pol); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 626 | if (delete) { |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 627 | *err = security_xfrm_policy_delete( |
| 628 | pol->security); |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 629 | if (*err) { |
| 630 | write_unlock_bh(&xfrm_policy_lock); |
| 631 | return pol; |
| 632 | } |
Wei Yongjun | 29fa0b30 | 2008-12-03 00:33:09 -0800 | [diff] [blame] | 633 | __xfrm_policy_unlink(pol, dir); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 634 | } |
| 635 | ret = pol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | break; |
| 637 | } |
| 638 | } |
| 639 | write_unlock_bh(&xfrm_policy_lock); |
| 640 | |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 641 | if (ret && delete) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 642 | xfrm_policy_kill(ret); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 643 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | } |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 645 | EXPORT_SYMBOL(xfrm_policy_bysel_ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | |
Jamal Hadi Salim | 8ca2e93 | 2010-02-22 11:32:57 +0000 | [diff] [blame] | 647 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8 type, |
| 648 | int dir, u32 id, int delete, int *err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 650 | struct xfrm_policy *pol, *ret; |
| 651 | struct hlist_head *chain; |
| 652 | struct hlist_node *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
Herbert Xu | b5505c6 | 2007-05-14 02:15:47 -0700 | [diff] [blame] | 654 | *err = -ENOENT; |
| 655 | if (xfrm_policy_id2dir(id) != dir) |
| 656 | return NULL; |
| 657 | |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 658 | *err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | write_lock_bh(&xfrm_policy_lock); |
Alexey Dobriyan | 8d1211a | 2008-11-25 17:34:20 -0800 | [diff] [blame] | 660 | chain = net->xfrm.policy_byidx + idx_hash(net, id); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 661 | ret = NULL; |
| 662 | hlist_for_each_entry(pol, entry, chain, byidx) { |
Jamal Hadi Salim | 34f8d88 | 2010-02-22 11:32:58 +0000 | [diff] [blame] | 663 | if (pol->type == type && pol->index == id && |
| 664 | (mark & pol->mark.m) == pol->mark.v) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | xfrm_pol_hold(pol); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 666 | if (delete) { |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 667 | *err = security_xfrm_policy_delete( |
| 668 | pol->security); |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 669 | if (*err) { |
| 670 | write_unlock_bh(&xfrm_policy_lock); |
| 671 | return pol; |
| 672 | } |
Wei Yongjun | 29fa0b30 | 2008-12-03 00:33:09 -0800 | [diff] [blame] | 673 | __xfrm_policy_unlink(pol, dir); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 674 | } |
| 675 | ret = pol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | break; |
| 677 | } |
| 678 | } |
| 679 | write_unlock_bh(&xfrm_policy_lock); |
| 680 | |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 681 | if (ret && delete) |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 682 | xfrm_policy_kill(ret); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 683 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | } |
| 685 | EXPORT_SYMBOL(xfrm_policy_byid); |
| 686 | |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 687 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
| 688 | static inline int |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 689 | xfrm_policy_flush_secctx_check(struct net *net, u8 type, struct xfrm_audit *audit_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | { |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 691 | int dir, err = 0; |
| 692 | |
| 693 | for (dir = 0; dir < XFRM_POLICY_MAX; dir++) { |
| 694 | struct xfrm_policy *pol; |
| 695 | struct hlist_node *entry; |
| 696 | int i; |
| 697 | |
| 698 | hlist_for_each_entry(pol, entry, |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 699 | &net->xfrm.policy_inexact[dir], bydst) { |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 700 | if (pol->type != type) |
| 701 | continue; |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 702 | err = security_xfrm_policy_delete(pol->security); |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 703 | if (err) { |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 704 | xfrm_audit_policy_delete(pol, 0, |
| 705 | audit_info->loginuid, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 706 | audit_info->sessionid, |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 707 | audit_info->secid); |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 708 | return err; |
| 709 | } |
YOSHIFUJI Hideaki | 7dc12d6 | 2007-07-19 10:45:15 +0900 | [diff] [blame] | 710 | } |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 711 | for (i = net->xfrm.policy_bydst[dir].hmask; i >= 0; i--) { |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 712 | hlist_for_each_entry(pol, entry, |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 713 | net->xfrm.policy_bydst[dir].table + i, |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 714 | bydst) { |
| 715 | if (pol->type != type) |
| 716 | continue; |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 717 | err = security_xfrm_policy_delete( |
| 718 | pol->security); |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 719 | if (err) { |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 720 | xfrm_audit_policy_delete(pol, 0, |
| 721 | audit_info->loginuid, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 722 | audit_info->sessionid, |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 723 | audit_info->secid); |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 724 | return err; |
| 725 | } |
| 726 | } |
| 727 | } |
| 728 | } |
| 729 | return err; |
| 730 | } |
| 731 | #else |
| 732 | static inline int |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 733 | xfrm_policy_flush_secctx_check(struct net *net, u8 type, struct xfrm_audit *audit_info) |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 734 | { |
| 735 | return 0; |
| 736 | } |
| 737 | #endif |
| 738 | |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 739 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info) |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 740 | { |
Jamal Hadi Salim | 2f1eb65 | 2010-02-19 02:00:42 +0000 | [diff] [blame] | 741 | int dir, err = 0, cnt = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
| 743 | write_lock_bh(&xfrm_policy_lock); |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 744 | |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 745 | err = xfrm_policy_flush_secctx_check(net, type, audit_info); |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 746 | if (err) |
| 747 | goto out; |
| 748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | for (dir = 0; dir < XFRM_POLICY_MAX; dir++) { |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 750 | struct xfrm_policy *pol; |
| 751 | struct hlist_node *entry; |
Wei Yongjun | 29fa0b30 | 2008-12-03 00:33:09 -0800 | [diff] [blame] | 752 | int i; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 753 | |
| 754 | again1: |
| 755 | hlist_for_each_entry(pol, entry, |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 756 | &net->xfrm.policy_inexact[dir], bydst) { |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 757 | if (pol->type != type) |
| 758 | continue; |
Timo Teräs | ea2dea9 | 2010-03-31 00:17:05 +0000 | [diff] [blame] | 759 | __xfrm_policy_unlink(pol, dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | write_unlock_bh(&xfrm_policy_lock); |
Timo Teräs | ea2dea9 | 2010-03-31 00:17:05 +0000 | [diff] [blame] | 761 | cnt++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 763 | xfrm_audit_policy_delete(pol, 1, audit_info->loginuid, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 764 | audit_info->sessionid, |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 765 | audit_info->secid); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 766 | |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 767 | xfrm_policy_kill(pol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
| 769 | write_lock_bh(&xfrm_policy_lock); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 770 | goto again1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | } |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 772 | |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 773 | for (i = net->xfrm.policy_bydst[dir].hmask; i >= 0; i--) { |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 774 | again2: |
| 775 | hlist_for_each_entry(pol, entry, |
Alexey Dobriyan | 33ffbbd | 2008-11-25 17:33:32 -0800 | [diff] [blame] | 776 | net->xfrm.policy_bydst[dir].table + i, |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 777 | bydst) { |
| 778 | if (pol->type != type) |
| 779 | continue; |
Timo Teräs | ea2dea9 | 2010-03-31 00:17:05 +0000 | [diff] [blame] | 780 | __xfrm_policy_unlink(pol, dir); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 781 | write_unlock_bh(&xfrm_policy_lock); |
Timo Teräs | ea2dea9 | 2010-03-31 00:17:05 +0000 | [diff] [blame] | 782 | cnt++; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 783 | |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 784 | xfrm_audit_policy_delete(pol, 1, |
| 785 | audit_info->loginuid, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 786 | audit_info->sessionid, |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 787 | audit_info->secid); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 788 | xfrm_policy_kill(pol); |
| 789 | |
| 790 | write_lock_bh(&xfrm_policy_lock); |
| 791 | goto again2; |
| 792 | } |
| 793 | } |
| 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | } |
Jamal Hadi Salim | 2f1eb65 | 2010-02-19 02:00:42 +0000 | [diff] [blame] | 796 | if (!cnt) |
| 797 | err = -ESRCH; |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 798 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | write_unlock_bh(&xfrm_policy_lock); |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 800 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | } |
| 802 | EXPORT_SYMBOL(xfrm_policy_flush); |
| 803 | |
Alexey Dobriyan | cdcbca7 | 2008-11-25 17:34:49 -0800 | [diff] [blame] | 804 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 805 | int (*func)(struct xfrm_policy *, int, int, void*), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | void *data) |
| 807 | { |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 808 | struct xfrm_policy *pol; |
| 809 | struct xfrm_policy_walk_entry *x; |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 810 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 812 | if (walk->type >= XFRM_POLICY_TYPE_MAX && |
| 813 | walk->type != XFRM_POLICY_TYPE_ANY) |
| 814 | return -EINVAL; |
| 815 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 816 | if (list_empty(&walk->walk.all) && walk->seq != 0) |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 817 | return 0; |
| 818 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 819 | write_lock_bh(&xfrm_policy_lock); |
| 820 | if (list_empty(&walk->walk.all)) |
Alexey Dobriyan | cdcbca7 | 2008-11-25 17:34:49 -0800 | [diff] [blame] | 821 | x = list_first_entry(&net->xfrm.policy_all, struct xfrm_policy_walk_entry, all); |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 822 | else |
| 823 | x = list_entry(&walk->walk.all, struct xfrm_policy_walk_entry, all); |
Alexey Dobriyan | cdcbca7 | 2008-11-25 17:34:49 -0800 | [diff] [blame] | 824 | list_for_each_entry_from(x, &net->xfrm.policy_all, all) { |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 825 | if (x->dead) |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 826 | continue; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 827 | pol = container_of(x, struct xfrm_policy, walk); |
| 828 | if (walk->type != XFRM_POLICY_TYPE_ANY && |
| 829 | walk->type != pol->type) |
| 830 | continue; |
| 831 | error = func(pol, xfrm_policy_id2dir(pol->index), |
| 832 | walk->seq, data); |
| 833 | if (error) { |
| 834 | list_move_tail(&walk->walk.all, &x->all); |
| 835 | goto out; |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 836 | } |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 837 | walk->seq++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | } |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 839 | if (walk->seq == 0) { |
Jamal Hadi Salim | baf5d74 | 2006-12-04 20:02:37 -0800 | [diff] [blame] | 840 | error = -ENOENT; |
| 841 | goto out; |
| 842 | } |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 843 | list_del_init(&walk->walk.all); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | out: |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 845 | write_unlock_bh(&xfrm_policy_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | return error; |
| 847 | } |
| 848 | EXPORT_SYMBOL(xfrm_policy_walk); |
| 849 | |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 850 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type) |
| 851 | { |
| 852 | INIT_LIST_HEAD(&walk->walk.all); |
| 853 | walk->walk.dead = 1; |
| 854 | walk->type = type; |
| 855 | walk->seq = 0; |
| 856 | } |
| 857 | EXPORT_SYMBOL(xfrm_policy_walk_init); |
| 858 | |
| 859 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk) |
| 860 | { |
| 861 | if (list_empty(&walk->walk.all)) |
| 862 | return; |
| 863 | |
| 864 | write_lock_bh(&xfrm_policy_lock); |
| 865 | list_del(&walk->walk.all); |
| 866 | write_unlock_bh(&xfrm_policy_lock); |
| 867 | } |
| 868 | EXPORT_SYMBOL(xfrm_policy_walk_done); |
| 869 | |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 870 | /* |
| 871 | * Find policy to apply to this flow. |
| 872 | * |
| 873 | * Returns 0 if policy found, else an -errno. |
| 874 | */ |
David S. Miller | f299d55 | 2011-02-24 01:23:30 -0500 | [diff] [blame] | 875 | static int xfrm_policy_match(const struct xfrm_policy *pol, |
| 876 | const struct flowi *fl, |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 877 | u8 type, u16 family, int dir) |
| 878 | { |
David S. Miller | f299d55 | 2011-02-24 01:23:30 -0500 | [diff] [blame] | 879 | const struct xfrm_selector *sel = &pol->selector; |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 880 | int match, ret = -ESRCH; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 881 | |
| 882 | if (pol->family != family || |
David S. Miller | 1d28f42 | 2011-03-12 00:29:39 -0500 | [diff] [blame] | 883 | (fl->flowi_mark & pol->mark.m) != pol->mark.v || |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 884 | pol->type != type) |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 885 | return ret; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 886 | |
| 887 | match = xfrm_selector_match(sel, fl, family); |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 888 | if (match) |
David S. Miller | 1d28f42 | 2011-03-12 00:29:39 -0500 | [diff] [blame] | 889 | ret = security_xfrm_policy_lookup(pol->security, fl->flowi_secid, |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 890 | dir); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 891 | |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 892 | return ret; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 893 | } |
| 894 | |
Alexey Dobriyan | 52479b6 | 2008-11-25 17:35:18 -0800 | [diff] [blame] | 895 | static struct xfrm_policy *xfrm_policy_lookup_bytype(struct net *net, u8 type, |
David S. Miller | 062cdb4 | 2011-02-22 18:31:08 -0800 | [diff] [blame] | 896 | const struct flowi *fl, |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 897 | u16 family, u8 dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | { |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 899 | int err; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 900 | struct xfrm_policy *pol, *ret; |
David S. Miller | 0b597e7 | 2011-02-24 01:22:48 -0500 | [diff] [blame] | 901 | const xfrm_address_t *daddr, *saddr; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 902 | struct hlist_node *entry; |
| 903 | struct hlist_head *chain; |
David S. Miller | acba48e | 2006-08-25 15:46:46 -0700 | [diff] [blame] | 904 | u32 priority = ~0U; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 905 | |
| 906 | daddr = xfrm_flowi_daddr(fl, family); |
| 907 | saddr = xfrm_flowi_saddr(fl, family); |
| 908 | if (unlikely(!daddr || !saddr)) |
| 909 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | |
| 911 | read_lock_bh(&xfrm_policy_lock); |
Alexey Dobriyan | 52479b6 | 2008-11-25 17:35:18 -0800 | [diff] [blame] | 912 | chain = policy_hash_direct(net, daddr, saddr, family, dir); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 913 | ret = NULL; |
| 914 | hlist_for_each_entry(pol, entry, chain, bydst) { |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 915 | err = xfrm_policy_match(pol, fl, type, family, dir); |
| 916 | if (err) { |
| 917 | if (err == -ESRCH) |
| 918 | continue; |
| 919 | else { |
| 920 | ret = ERR_PTR(err); |
| 921 | goto fail; |
| 922 | } |
| 923 | } else { |
David S. Miller | acba48e | 2006-08-25 15:46:46 -0700 | [diff] [blame] | 924 | ret = pol; |
| 925 | priority = ret->priority; |
| 926 | break; |
| 927 | } |
| 928 | } |
Alexey Dobriyan | 52479b6 | 2008-11-25 17:35:18 -0800 | [diff] [blame] | 929 | chain = &net->xfrm.policy_inexact[dir]; |
David S. Miller | acba48e | 2006-08-25 15:46:46 -0700 | [diff] [blame] | 930 | hlist_for_each_entry(pol, entry, chain, bydst) { |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 931 | err = xfrm_policy_match(pol, fl, type, family, dir); |
| 932 | if (err) { |
| 933 | if (err == -ESRCH) |
| 934 | continue; |
| 935 | else { |
| 936 | ret = ERR_PTR(err); |
| 937 | goto fail; |
| 938 | } |
| 939 | } else if (pol->priority < priority) { |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 940 | ret = pol; |
| 941 | break; |
| 942 | } |
| 943 | } |
David S. Miller | acba48e | 2006-08-25 15:46:46 -0700 | [diff] [blame] | 944 | if (ret) |
| 945 | xfrm_pol_hold(ret); |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 946 | fail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | read_unlock_bh(&xfrm_policy_lock); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 948 | |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 949 | return ret; |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 950 | } |
| 951 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 952 | static struct xfrm_policy * |
David S. Miller | 73ff93c | 2011-02-22 18:33:42 -0800 | [diff] [blame] | 953 | __xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir) |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 954 | { |
| 955 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 956 | struct xfrm_policy *pol; |
| 957 | |
| 958 | pol = xfrm_policy_lookup_bytype(net, XFRM_POLICY_TYPE_SUB, fl, family, dir); |
| 959 | if (pol != NULL) |
| 960 | return pol; |
| 961 | #endif |
| 962 | return xfrm_policy_lookup_bytype(net, XFRM_POLICY_TYPE_MAIN, fl, family, dir); |
| 963 | } |
| 964 | |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 965 | static struct flow_cache_object * |
David S. Miller | dee9f4b | 2011-02-22 18:44:31 -0800 | [diff] [blame] | 966 | xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 967 | u8 dir, struct flow_cache_object *old_obj, void *ctx) |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 968 | { |
| 969 | struct xfrm_policy *pol; |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 970 | |
| 971 | if (old_obj) |
| 972 | xfrm_pol_put(container_of(old_obj, struct xfrm_policy, flo)); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 973 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 974 | pol = __xfrm_policy_lookup(net, fl, family, dir); |
| 975 | if (IS_ERR_OR_NULL(pol)) |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 976 | return ERR_CAST(pol); |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 977 | |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 978 | /* Resolver returns two references: |
| 979 | * one for cache and one for caller of flow_cache_lookup() */ |
| 980 | xfrm_pol_hold(pol); |
| 981 | |
| 982 | return &pol->flo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | } |
| 984 | |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 985 | static inline int policy_to_flow_dir(int dir) |
| 986 | { |
| 987 | if (XFRM_POLICY_IN == FLOW_DIR_IN && |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 988 | XFRM_POLICY_OUT == FLOW_DIR_OUT && |
| 989 | XFRM_POLICY_FWD == FLOW_DIR_FWD) |
| 990 | return dir; |
| 991 | switch (dir) { |
| 992 | default: |
| 993 | case XFRM_POLICY_IN: |
| 994 | return FLOW_DIR_IN; |
| 995 | case XFRM_POLICY_OUT: |
| 996 | return FLOW_DIR_OUT; |
| 997 | case XFRM_POLICY_FWD: |
| 998 | return FLOW_DIR_FWD; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 999 | } |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1000 | } |
| 1001 | |
David S. Miller | dee9f4b | 2011-02-22 18:44:31 -0800 | [diff] [blame] | 1002 | static struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir, |
| 1003 | const struct flowi *fl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | { |
| 1005 | struct xfrm_policy *pol; |
| 1006 | |
| 1007 | read_lock_bh(&xfrm_policy_lock); |
| 1008 | if ((pol = sk->sk_policy[dir]) != NULL) { |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 1009 | int match = xfrm_selector_match(&pol->selector, fl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | sk->sk_family); |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 1011 | int err = 0; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1012 | |
Venkat Yekkirala | 3bccfbc | 2006-10-05 15:42:35 -0500 | [diff] [blame] | 1013 | if (match) { |
Jamal Hadi Salim | 34f8d88 | 2010-02-22 11:32:58 +0000 | [diff] [blame] | 1014 | if ((sk->sk_mark & pol->mark.m) != pol->mark.v) { |
| 1015 | pol = NULL; |
| 1016 | goto out; |
| 1017 | } |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1018 | err = security_xfrm_policy_lookup(pol->security, |
David S. Miller | 1d28f42 | 2011-03-12 00:29:39 -0500 | [diff] [blame] | 1019 | fl->flowi_secid, |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1020 | policy_to_flow_dir(dir)); |
Venkat Yekkirala | 3bccfbc | 2006-10-05 15:42:35 -0500 | [diff] [blame] | 1021 | if (!err) |
| 1022 | xfrm_pol_hold(pol); |
| 1023 | else if (err == -ESRCH) |
| 1024 | pol = NULL; |
| 1025 | else |
| 1026 | pol = ERR_PTR(err); |
| 1027 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | pol = NULL; |
| 1029 | } |
Jamal Hadi Salim | 34f8d88 | 2010-02-22 11:32:58 +0000 | [diff] [blame] | 1030 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | read_unlock_bh(&xfrm_policy_lock); |
| 1032 | return pol; |
| 1033 | } |
| 1034 | |
| 1035 | static void __xfrm_policy_link(struct xfrm_policy *pol, int dir) |
| 1036 | { |
Alexey Dobriyan | 98806f7 | 2008-11-25 17:29:47 -0800 | [diff] [blame] | 1037 | struct net *net = xp_net(pol); |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 1038 | struct hlist_head *chain = policy_hash_bysel(net, &pol->selector, |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 1039 | pol->family, dir); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1040 | |
Alexey Dobriyan | 98806f7 | 2008-11-25 17:29:47 -0800 | [diff] [blame] | 1041 | list_add(&pol->walk.all, &net->xfrm.policy_all); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 1042 | hlist_add_head(&pol->bydst, chain); |
Alexey Dobriyan | e92303f | 2008-11-25 17:32:41 -0800 | [diff] [blame] | 1043 | hlist_add_head(&pol->byidx, net->xfrm.policy_byidx+idx_hash(net, pol->index)); |
Alexey Dobriyan | 98806f7 | 2008-11-25 17:29:47 -0800 | [diff] [blame] | 1044 | net->xfrm.policy_count[dir]++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | xfrm_pol_hold(pol); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 1046 | |
Alexey Dobriyan | 98806f7 | 2008-11-25 17:29:47 -0800 | [diff] [blame] | 1047 | if (xfrm_bydst_should_resize(net, dir, NULL)) |
| 1048 | schedule_work(&net->xfrm.policy_hash_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | static struct xfrm_policy *__xfrm_policy_unlink(struct xfrm_policy *pol, |
| 1052 | int dir) |
| 1053 | { |
Alexey Dobriyan | 98806f7 | 2008-11-25 17:29:47 -0800 | [diff] [blame] | 1054 | struct net *net = xp_net(pol); |
| 1055 | |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 1056 | if (hlist_unhashed(&pol->bydst)) |
| 1057 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 1059 | hlist_del(&pol->bydst); |
| 1060 | hlist_del(&pol->byidx); |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 1061 | list_del(&pol->walk.all); |
Alexey Dobriyan | 98806f7 | 2008-11-25 17:29:47 -0800 | [diff] [blame] | 1062 | net->xfrm.policy_count[dir]--; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 1063 | |
| 1064 | return pol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | } |
| 1066 | |
Herbert Xu | 4666faa | 2005-06-18 22:43:22 -0700 | [diff] [blame] | 1067 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | { |
| 1069 | write_lock_bh(&xfrm_policy_lock); |
| 1070 | pol = __xfrm_policy_unlink(pol, dir); |
| 1071 | write_unlock_bh(&xfrm_policy_lock); |
| 1072 | if (pol) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | xfrm_policy_kill(pol); |
Herbert Xu | 4666faa | 2005-06-18 22:43:22 -0700 | [diff] [blame] | 1074 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | } |
Herbert Xu | 4666faa | 2005-06-18 22:43:22 -0700 | [diff] [blame] | 1076 | return -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | } |
David S. Miller | a70fcb0 | 2006-03-20 19:18:52 -0800 | [diff] [blame] | 1078 | EXPORT_SYMBOL(xfrm_policy_delete); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | |
| 1080 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol) |
| 1081 | { |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 1082 | struct net *net = xp_net(pol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | struct xfrm_policy *old_pol; |
| 1084 | |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1085 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1086 | if (pol && pol->type != XFRM_POLICY_TYPE_MAIN) |
| 1087 | return -EINVAL; |
| 1088 | #endif |
| 1089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | write_lock_bh(&xfrm_policy_lock); |
| 1091 | old_pol = sk->sk_policy[dir]; |
| 1092 | sk->sk_policy[dir] = pol; |
| 1093 | if (pol) { |
James Morris | 9d729f7 | 2007-03-04 16:12:44 -0800 | [diff] [blame] | 1094 | pol->curlft.add_time = get_seconds(); |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 1095 | pol->index = xfrm_gen_index(net, XFRM_POLICY_MAX+dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | __xfrm_policy_link(pol, XFRM_POLICY_MAX+dir); |
| 1097 | } |
| 1098 | if (old_pol) |
Timo Teräs | ea2dea9 | 2010-03-31 00:17:05 +0000 | [diff] [blame] | 1099 | /* Unlinking succeeds always. This is the only function |
| 1100 | * allowed to delete or replace socket policy. |
| 1101 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | __xfrm_policy_unlink(old_pol, XFRM_POLICY_MAX+dir); |
| 1103 | write_unlock_bh(&xfrm_policy_lock); |
| 1104 | |
| 1105 | if (old_pol) { |
| 1106 | xfrm_policy_kill(old_pol); |
| 1107 | } |
| 1108 | return 0; |
| 1109 | } |
| 1110 | |
David S. Miller | d3e40a9 | 2011-02-24 01:25:41 -0500 | [diff] [blame] | 1111 | static struct xfrm_policy *clone_policy(const struct xfrm_policy *old, int dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | { |
Alexey Dobriyan | 0331b1f | 2008-11-25 17:21:45 -0800 | [diff] [blame] | 1113 | struct xfrm_policy *newp = xfrm_policy_alloc(xp_net(old), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | |
| 1115 | if (newp) { |
| 1116 | newp->selector = old->selector; |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1117 | if (security_xfrm_policy_clone(old->security, |
| 1118 | &newp->security)) { |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1119 | kfree(newp); |
| 1120 | return NULL; /* ENOMEM */ |
| 1121 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | newp->lft = old->lft; |
| 1123 | newp->curlft = old->curlft; |
Jamal Hadi Salim | fb977e2 | 2010-02-23 15:09:53 -0800 | [diff] [blame] | 1124 | newp->mark = old->mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | newp->action = old->action; |
| 1126 | newp->flags = old->flags; |
| 1127 | newp->xfrm_nr = old->xfrm_nr; |
| 1128 | newp->index = old->index; |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1129 | newp->type = old->type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | memcpy(newp->xfrm_vec, old->xfrm_vec, |
| 1131 | newp->xfrm_nr*sizeof(struct xfrm_tmpl)); |
| 1132 | write_lock_bh(&xfrm_policy_lock); |
| 1133 | __xfrm_policy_link(newp, XFRM_POLICY_MAX+dir); |
| 1134 | write_unlock_bh(&xfrm_policy_lock); |
| 1135 | xfrm_pol_put(newp); |
| 1136 | } |
| 1137 | return newp; |
| 1138 | } |
| 1139 | |
| 1140 | int __xfrm_sk_clone_policy(struct sock *sk) |
| 1141 | { |
| 1142 | struct xfrm_policy *p0 = sk->sk_policy[0], |
| 1143 | *p1 = sk->sk_policy[1]; |
| 1144 | |
| 1145 | sk->sk_policy[0] = sk->sk_policy[1] = NULL; |
| 1146 | if (p0 && (sk->sk_policy[0] = clone_policy(p0, 0)) == NULL) |
| 1147 | return -ENOMEM; |
| 1148 | if (p1 && (sk->sk_policy[1] = clone_policy(p1, 1)) == NULL) |
| 1149 | return -ENOMEM; |
| 1150 | return 0; |
| 1151 | } |
| 1152 | |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 1153 | static int |
Alexey Dobriyan | fbda33b | 2008-11-25 17:56:49 -0800 | [diff] [blame] | 1154 | xfrm_get_saddr(struct net *net, xfrm_address_t *local, xfrm_address_t *remote, |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 1155 | unsigned short family) |
| 1156 | { |
| 1157 | int err; |
| 1158 | struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); |
| 1159 | |
| 1160 | if (unlikely(afinfo == NULL)) |
| 1161 | return -EINVAL; |
Alexey Dobriyan | fbda33b | 2008-11-25 17:56:49 -0800 | [diff] [blame] | 1162 | err = afinfo->get_saddr(net, local, remote); |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 1163 | xfrm_policy_put_afinfo(afinfo); |
| 1164 | return err; |
| 1165 | } |
| 1166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | /* Resolve list of templates for the flow, given policy. */ |
| 1168 | |
| 1169 | static int |
David S. Miller | a6c2e61 | 2011-02-22 18:35:39 -0800 | [diff] [blame] | 1170 | xfrm_tmpl_resolve_one(struct xfrm_policy *policy, const struct flowi *fl, |
| 1171 | struct xfrm_state **xfrm, unsigned short family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | { |
Alexey Dobriyan | fbda33b | 2008-11-25 17:56:49 -0800 | [diff] [blame] | 1173 | struct net *net = xp_net(policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | int nx; |
| 1175 | int i, error; |
| 1176 | xfrm_address_t *daddr = xfrm_flowi_daddr(fl, family); |
| 1177 | xfrm_address_t *saddr = xfrm_flowi_saddr(fl, family); |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 1178 | xfrm_address_t tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | |
| 1180 | for (nx=0, i = 0; i < policy->xfrm_nr; i++) { |
| 1181 | struct xfrm_state *x; |
| 1182 | xfrm_address_t *remote = daddr; |
| 1183 | xfrm_address_t *local = saddr; |
| 1184 | struct xfrm_tmpl *tmpl = &policy->xfrm_vec[i]; |
| 1185 | |
Joakim Koskela | 48b8d78 | 2007-07-26 00:08:42 -0700 | [diff] [blame] | 1186 | if (tmpl->mode == XFRM_MODE_TUNNEL || |
| 1187 | tmpl->mode == XFRM_MODE_BEET) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | remote = &tmpl->id.daddr; |
| 1189 | local = &tmpl->saddr; |
Thomas Egerer | 8444cf7 | 2010-09-20 11:11:38 -0700 | [diff] [blame] | 1190 | if (xfrm_addr_any(local, tmpl->encap_family)) { |
| 1191 | error = xfrm_get_saddr(net, &tmp, remote, tmpl->encap_family); |
Patrick McHardy | a1e59ab | 2006-09-19 12:57:34 -0700 | [diff] [blame] | 1192 | if (error) |
| 1193 | goto fail; |
| 1194 | local = &tmp; |
| 1195 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | } |
| 1197 | |
| 1198 | x = xfrm_state_find(remote, local, fl, tmpl, policy, &error, family); |
| 1199 | |
| 1200 | if (x && x->km.state == XFRM_STATE_VALID) { |
| 1201 | xfrm[nx++] = x; |
| 1202 | daddr = remote; |
| 1203 | saddr = local; |
| 1204 | continue; |
| 1205 | } |
| 1206 | if (x) { |
| 1207 | error = (x->km.state == XFRM_STATE_ERROR ? |
| 1208 | -EINVAL : -EAGAIN); |
| 1209 | xfrm_state_put(x); |
| 1210 | } |
fernando@oss.ntt.co | a4322266 | 2008-10-23 04:27:19 +0000 | [diff] [blame] | 1211 | else if (error == -ESRCH) |
| 1212 | error = -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | |
| 1214 | if (!tmpl->optional) |
| 1215 | goto fail; |
| 1216 | } |
| 1217 | return nx; |
| 1218 | |
| 1219 | fail: |
| 1220 | for (nx--; nx>=0; nx--) |
| 1221 | xfrm_state_put(xfrm[nx]); |
| 1222 | return error; |
| 1223 | } |
| 1224 | |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1225 | static int |
David S. Miller | a6c2e61 | 2011-02-22 18:35:39 -0800 | [diff] [blame] | 1226 | xfrm_tmpl_resolve(struct xfrm_policy **pols, int npols, const struct flowi *fl, |
| 1227 | struct xfrm_state **xfrm, unsigned short family) |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1228 | { |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 1229 | struct xfrm_state *tp[XFRM_MAX_DEPTH]; |
| 1230 | struct xfrm_state **tpp = (npols > 1) ? tp : xfrm; |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1231 | int cnx = 0; |
| 1232 | int error; |
| 1233 | int ret; |
| 1234 | int i; |
| 1235 | |
| 1236 | for (i = 0; i < npols; i++) { |
| 1237 | if (cnx + pols[i]->xfrm_nr >= XFRM_MAX_DEPTH) { |
| 1238 | error = -ENOBUFS; |
| 1239 | goto fail; |
| 1240 | } |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 1241 | |
| 1242 | ret = xfrm_tmpl_resolve_one(pols[i], fl, &tpp[cnx], family); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1243 | if (ret < 0) { |
| 1244 | error = ret; |
| 1245 | goto fail; |
| 1246 | } else |
| 1247 | cnx += ret; |
| 1248 | } |
| 1249 | |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 1250 | /* found states are sorted for outbound processing */ |
| 1251 | if (npols > 1) |
| 1252 | xfrm_state_sort(xfrm, tpp, cnx, family); |
| 1253 | |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1254 | return cnx; |
| 1255 | |
| 1256 | fail: |
| 1257 | for (cnx--; cnx>=0; cnx--) |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 1258 | xfrm_state_put(tpp[cnx]); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1259 | return error; |
| 1260 | |
| 1261 | } |
| 1262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | /* Check that the bundle accepts the flow and its components are |
| 1264 | * still valid. |
| 1265 | */ |
| 1266 | |
David S. Miller | 05d8402 | 2011-02-22 17:47:10 -0800 | [diff] [blame] | 1267 | static inline int xfrm_get_tos(const struct flowi *fl, int family) |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1268 | { |
| 1269 | struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); |
| 1270 | int tos; |
| 1271 | |
| 1272 | if (!afinfo) |
| 1273 | return -EINVAL; |
| 1274 | |
| 1275 | tos = afinfo->get_tos(fl); |
| 1276 | |
| 1277 | xfrm_policy_put_afinfo(afinfo); |
| 1278 | |
| 1279 | return tos; |
| 1280 | } |
| 1281 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1282 | static struct flow_cache_object *xfrm_bundle_flo_get(struct flow_cache_object *flo) |
| 1283 | { |
| 1284 | struct xfrm_dst *xdst = container_of(flo, struct xfrm_dst, flo); |
| 1285 | struct dst_entry *dst = &xdst->u.dst; |
| 1286 | |
| 1287 | if (xdst->route == NULL) { |
| 1288 | /* Dummy bundle - if it has xfrms we were not |
| 1289 | * able to build bundle as template resolution failed. |
| 1290 | * It means we need to try again resolving. */ |
| 1291 | if (xdst->num_xfrms > 0) |
| 1292 | return NULL; |
| 1293 | } else { |
| 1294 | /* Real bundle */ |
| 1295 | if (stale_bundle(dst)) |
| 1296 | return NULL; |
| 1297 | } |
| 1298 | |
| 1299 | dst_hold(dst); |
| 1300 | return flo; |
| 1301 | } |
| 1302 | |
| 1303 | static int xfrm_bundle_flo_check(struct flow_cache_object *flo) |
| 1304 | { |
| 1305 | struct xfrm_dst *xdst = container_of(flo, struct xfrm_dst, flo); |
| 1306 | struct dst_entry *dst = &xdst->u.dst; |
| 1307 | |
| 1308 | if (!xdst->route) |
| 1309 | return 0; |
| 1310 | if (stale_bundle(dst)) |
| 1311 | return 0; |
| 1312 | |
| 1313 | return 1; |
| 1314 | } |
| 1315 | |
| 1316 | static void xfrm_bundle_flo_delete(struct flow_cache_object *flo) |
| 1317 | { |
| 1318 | struct xfrm_dst *xdst = container_of(flo, struct xfrm_dst, flo); |
| 1319 | struct dst_entry *dst = &xdst->u.dst; |
| 1320 | |
| 1321 | dst_free(dst); |
| 1322 | } |
| 1323 | |
| 1324 | static const struct flow_cache_ops xfrm_bundle_fc_ops = { |
| 1325 | .get = xfrm_bundle_flo_get, |
| 1326 | .check = xfrm_bundle_flo_check, |
| 1327 | .delete = xfrm_bundle_flo_delete, |
| 1328 | }; |
| 1329 | |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 1330 | static inline struct xfrm_dst *xfrm_alloc_dst(struct net *net, int family) |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1331 | { |
| 1332 | struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 1333 | struct dst_ops *dst_ops; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1334 | struct xfrm_dst *xdst; |
| 1335 | |
| 1336 | if (!afinfo) |
| 1337 | return ERR_PTR(-EINVAL); |
| 1338 | |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 1339 | switch (family) { |
| 1340 | case AF_INET: |
| 1341 | dst_ops = &net->xfrm.xfrm4_dst_ops; |
| 1342 | break; |
| 1343 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 1344 | case AF_INET6: |
| 1345 | dst_ops = &net->xfrm.xfrm6_dst_ops; |
| 1346 | break; |
| 1347 | #endif |
| 1348 | default: |
| 1349 | BUG(); |
| 1350 | } |
David S. Miller | 5c1e6aa | 2011-04-28 14:13:38 -0700 | [diff] [blame] | 1351 | xdst = dst_alloc(dst_ops, NULL, 0, 0, 0); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1352 | |
Madalin Bucur | d4cae56 | 2011-09-26 07:04:36 +0000 | [diff] [blame] | 1353 | if (likely(xdst)) { |
| 1354 | memset(&xdst->u.rt6.rt6i_table, 0, |
| 1355 | sizeof(*xdst) - sizeof(struct dst_entry)); |
Hiroaki SHIMODA | 0b15093 | 2011-02-10 23:08:33 -0800 | [diff] [blame] | 1356 | xdst->flo.ops = &xfrm_bundle_fc_ops; |
Madalin Bucur | d4cae56 | 2011-09-26 07:04:36 +0000 | [diff] [blame] | 1357 | } else |
Hiroaki SHIMODA | 0b15093 | 2011-02-10 23:08:33 -0800 | [diff] [blame] | 1358 | xdst = ERR_PTR(-ENOBUFS); |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1359 | |
Madalin Bucur | d4cae56 | 2011-09-26 07:04:36 +0000 | [diff] [blame] | 1360 | xfrm_policy_put_afinfo(afinfo); |
| 1361 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1362 | return xdst; |
| 1363 | } |
| 1364 | |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 1365 | static inline int xfrm_init_path(struct xfrm_dst *path, struct dst_entry *dst, |
| 1366 | int nfheader_len) |
| 1367 | { |
| 1368 | struct xfrm_policy_afinfo *afinfo = |
| 1369 | xfrm_policy_get_afinfo(dst->ops->family); |
| 1370 | int err; |
| 1371 | |
| 1372 | if (!afinfo) |
| 1373 | return -EINVAL; |
| 1374 | |
| 1375 | err = afinfo->init_path(path, dst, nfheader_len); |
| 1376 | |
| 1377 | xfrm_policy_put_afinfo(afinfo); |
| 1378 | |
| 1379 | return err; |
| 1380 | } |
| 1381 | |
Herbert Xu | 87c1e12 | 2010-03-02 02:51:56 +0000 | [diff] [blame] | 1382 | static inline int xfrm_fill_dst(struct xfrm_dst *xdst, struct net_device *dev, |
David S. Miller | 0c7b3ee | 2011-02-22 17:48:57 -0800 | [diff] [blame] | 1383 | const struct flowi *fl) |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1384 | { |
| 1385 | struct xfrm_policy_afinfo *afinfo = |
| 1386 | xfrm_policy_get_afinfo(xdst->u.dst.ops->family); |
| 1387 | int err; |
| 1388 | |
| 1389 | if (!afinfo) |
| 1390 | return -EINVAL; |
| 1391 | |
Herbert Xu | 87c1e12 | 2010-03-02 02:51:56 +0000 | [diff] [blame] | 1392 | err = afinfo->fill_dst(xdst, dev, fl); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1393 | |
| 1394 | xfrm_policy_put_afinfo(afinfo); |
| 1395 | |
| 1396 | return err; |
| 1397 | } |
| 1398 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | /* Allocate chain of dst_entry's, attach known xfrm's, calculate |
| 1401 | * all the metrics... Shortly, bundle a bundle. |
| 1402 | */ |
| 1403 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1404 | static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy, |
| 1405 | struct xfrm_state **xfrm, int nx, |
David S. Miller | 98313ad | 2011-02-22 18:36:50 -0800 | [diff] [blame] | 1406 | const struct flowi *fl, |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1407 | struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | { |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 1409 | struct net *net = xp_net(policy); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1410 | unsigned long now = jiffies; |
| 1411 | struct net_device *dev; |
Steffen Klassert | 43a4dea | 2011-05-09 19:36:38 +0000 | [diff] [blame] | 1412 | struct xfrm_mode *inner_mode; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1413 | struct dst_entry *dst_prev = NULL; |
| 1414 | struct dst_entry *dst0 = NULL; |
| 1415 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | int err; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1417 | int header_len = 0; |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 1418 | int nfheader_len = 0; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1419 | int trailer_len = 0; |
| 1420 | int tos; |
| 1421 | int family = policy->selector.family; |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1422 | xfrm_address_t saddr, daddr; |
| 1423 | |
| 1424 | xfrm_flowi_addr_get(fl, &saddr, &daddr, family); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1425 | |
| 1426 | tos = xfrm_get_tos(fl, family); |
| 1427 | err = tos; |
| 1428 | if (tos < 0) |
| 1429 | goto put_states; |
| 1430 | |
| 1431 | dst_hold(dst); |
| 1432 | |
| 1433 | for (; i < nx; i++) { |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 1434 | struct xfrm_dst *xdst = xfrm_alloc_dst(net, family); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1435 | struct dst_entry *dst1 = &xdst->u.dst; |
| 1436 | |
| 1437 | err = PTR_ERR(xdst); |
| 1438 | if (IS_ERR(xdst)) { |
| 1439 | dst_release(dst); |
| 1440 | goto put_states; |
| 1441 | } |
| 1442 | |
Steffen Klassert | 43a4dea | 2011-05-09 19:36:38 +0000 | [diff] [blame] | 1443 | if (xfrm[i]->sel.family == AF_UNSPEC) { |
| 1444 | inner_mode = xfrm_ip2inner_mode(xfrm[i], |
| 1445 | xfrm_af2proto(family)); |
| 1446 | if (!inner_mode) { |
| 1447 | err = -EAFNOSUPPORT; |
| 1448 | dst_release(dst); |
| 1449 | goto put_states; |
| 1450 | } |
| 1451 | } else |
| 1452 | inner_mode = xfrm[i]->inner_mode; |
| 1453 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1454 | if (!dst_prev) |
| 1455 | dst0 = dst1; |
| 1456 | else { |
| 1457 | dst_prev->child = dst_clone(dst1); |
| 1458 | dst1->flags |= DST_NOHASH; |
| 1459 | } |
| 1460 | |
| 1461 | xdst->route = dst; |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 1462 | dst_copy_metrics(dst1, dst); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1463 | |
| 1464 | if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) { |
| 1465 | family = xfrm[i]->props.family; |
YOSHIFUJI Hideaki | 9bb182a | 2008-02-22 14:48:22 +0900 | [diff] [blame] | 1466 | dst = xfrm_dst_lookup(xfrm[i], tos, &saddr, &daddr, |
| 1467 | family); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1468 | err = PTR_ERR(dst); |
| 1469 | if (IS_ERR(dst)) |
| 1470 | goto put_states; |
| 1471 | } else |
| 1472 | dst_hold(dst); |
| 1473 | |
| 1474 | dst1->xfrm = xfrm[i]; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1475 | xdst->xfrm_genid = xfrm[i]->genid; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1476 | |
| 1477 | dst1->obsolete = -1; |
| 1478 | dst1->flags |= DST_HOST; |
| 1479 | dst1->lastuse = now; |
| 1480 | |
| 1481 | dst1->input = dst_discard; |
Steffen Klassert | 43a4dea | 2011-05-09 19:36:38 +0000 | [diff] [blame] | 1482 | dst1->output = inner_mode->afinfo->output; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1483 | |
| 1484 | dst1->next = dst_prev; |
| 1485 | dst_prev = dst1; |
| 1486 | |
| 1487 | header_len += xfrm[i]->props.header_len; |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 1488 | if (xfrm[i]->type->flags & XFRM_TYPE_NON_FRAGMENT) |
| 1489 | nfheader_len += xfrm[i]->props.header_len; |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1490 | trailer_len += xfrm[i]->props.trailer_len; |
| 1491 | } |
| 1492 | |
| 1493 | dst_prev->child = dst; |
| 1494 | dst0->path = dst; |
| 1495 | |
| 1496 | err = -ENODEV; |
| 1497 | dev = dst->dev; |
| 1498 | if (!dev) |
| 1499 | goto free_dst; |
| 1500 | |
Ralf Baechle | 96c5340 | 2009-12-25 23:30:02 +0000 | [diff] [blame] | 1501 | /* Copy neighbour for reachability confirmation */ |
David S. Miller | 69cce1d | 2011-07-17 23:09:49 -0700 | [diff] [blame] | 1502 | dst_set_neighbour(dst0, neigh_clone(dst_get_neighbour(dst))); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1503 | |
Masahide NAKAMURA | a1b0514 | 2007-12-20 20:41:12 -0800 | [diff] [blame] | 1504 | xfrm_init_path((struct xfrm_dst *)dst0, dst, nfheader_len); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1505 | xfrm_init_pmtu(dst_prev); |
| 1506 | |
| 1507 | for (dst_prev = dst0; dst_prev != dst; dst_prev = dst_prev->child) { |
| 1508 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst_prev; |
| 1509 | |
Herbert Xu | 87c1e12 | 2010-03-02 02:51:56 +0000 | [diff] [blame] | 1510 | err = xfrm_fill_dst(xdst, dev, fl); |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 1511 | if (err) |
| 1512 | goto free_dst; |
| 1513 | |
| 1514 | dst_prev->header_len = header_len; |
| 1515 | dst_prev->trailer_len = trailer_len; |
| 1516 | header_len -= xdst->u.dst.xfrm->props.header_len; |
| 1517 | trailer_len -= xdst->u.dst.xfrm->props.trailer_len; |
| 1518 | } |
| 1519 | |
| 1520 | out: |
| 1521 | return dst0; |
| 1522 | |
| 1523 | put_states: |
| 1524 | for (; i < nx; i++) |
| 1525 | xfrm_state_put(xfrm[i]); |
| 1526 | free_dst: |
| 1527 | if (dst0) |
| 1528 | dst_free(dst0); |
| 1529 | dst0 = ERR_PTR(err); |
| 1530 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | } |
| 1532 | |
Masahide NAKAMURA | 157bfc2 | 2007-04-30 00:33:35 -0700 | [diff] [blame] | 1533 | static int inline |
David S. Miller | 3f0e18f | 2011-02-22 18:38:14 -0800 | [diff] [blame] | 1534 | xfrm_dst_alloc_copy(void **target, const void *src, int size) |
Masahide NAKAMURA | 157bfc2 | 2007-04-30 00:33:35 -0700 | [diff] [blame] | 1535 | { |
| 1536 | if (!*target) { |
| 1537 | *target = kmalloc(size, GFP_ATOMIC); |
| 1538 | if (!*target) |
| 1539 | return -ENOMEM; |
| 1540 | } |
| 1541 | memcpy(*target, src, size); |
| 1542 | return 0; |
| 1543 | } |
| 1544 | |
| 1545 | static int inline |
David S. Miller | 1786b38 | 2011-02-24 01:32:54 -0500 | [diff] [blame] | 1546 | xfrm_dst_update_parent(struct dst_entry *dst, const struct xfrm_selector *sel) |
Masahide NAKAMURA | 157bfc2 | 2007-04-30 00:33:35 -0700 | [diff] [blame] | 1547 | { |
| 1548 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1549 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 1550 | return xfrm_dst_alloc_copy((void **)&(xdst->partner), |
| 1551 | sel, sizeof(*sel)); |
| 1552 | #else |
| 1553 | return 0; |
| 1554 | #endif |
| 1555 | } |
| 1556 | |
| 1557 | static int inline |
David S. Miller | 3f0e18f | 2011-02-22 18:38:14 -0800 | [diff] [blame] | 1558 | xfrm_dst_update_origin(struct dst_entry *dst, const struct flowi *fl) |
Masahide NAKAMURA | 157bfc2 | 2007-04-30 00:33:35 -0700 | [diff] [blame] | 1559 | { |
| 1560 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1561 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 1562 | return xfrm_dst_alloc_copy((void **)&(xdst->origin), fl, sizeof(*fl)); |
| 1563 | #else |
| 1564 | return 0; |
| 1565 | #endif |
| 1566 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | |
David S. Miller | 73ff93c | 2011-02-22 18:33:42 -0800 | [diff] [blame] | 1568 | static int xfrm_expand_policies(const struct flowi *fl, u16 family, |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1569 | struct xfrm_policy **pols, |
| 1570 | int *num_pols, int *num_xfrms) |
| 1571 | { |
| 1572 | int i; |
| 1573 | |
| 1574 | if (*num_pols == 0 || !pols[0]) { |
| 1575 | *num_pols = 0; |
| 1576 | *num_xfrms = 0; |
| 1577 | return 0; |
| 1578 | } |
| 1579 | if (IS_ERR(pols[0])) |
| 1580 | return PTR_ERR(pols[0]); |
| 1581 | |
| 1582 | *num_xfrms = pols[0]->xfrm_nr; |
| 1583 | |
| 1584 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1585 | if (pols[0] && pols[0]->action == XFRM_POLICY_ALLOW && |
| 1586 | pols[0]->type != XFRM_POLICY_TYPE_MAIN) { |
| 1587 | pols[1] = xfrm_policy_lookup_bytype(xp_net(pols[0]), |
| 1588 | XFRM_POLICY_TYPE_MAIN, |
| 1589 | fl, family, |
| 1590 | XFRM_POLICY_OUT); |
| 1591 | if (pols[1]) { |
| 1592 | if (IS_ERR(pols[1])) { |
| 1593 | xfrm_pols_put(pols, *num_pols); |
| 1594 | return PTR_ERR(pols[1]); |
| 1595 | } |
| 1596 | (*num_pols) ++; |
| 1597 | (*num_xfrms) += pols[1]->xfrm_nr; |
| 1598 | } |
| 1599 | } |
| 1600 | #endif |
| 1601 | for (i = 0; i < *num_pols; i++) { |
| 1602 | if (pols[i]->action != XFRM_POLICY_ALLOW) { |
| 1603 | *num_xfrms = -1; |
| 1604 | break; |
| 1605 | } |
| 1606 | } |
| 1607 | |
| 1608 | return 0; |
| 1609 | |
| 1610 | } |
| 1611 | |
| 1612 | static struct xfrm_dst * |
| 1613 | xfrm_resolve_and_create_bundle(struct xfrm_policy **pols, int num_pols, |
David S. Miller | 4ca2e68 | 2011-02-22 18:38:51 -0800 | [diff] [blame] | 1614 | const struct flowi *fl, u16 family, |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1615 | struct dst_entry *dst_orig) |
| 1616 | { |
| 1617 | struct net *net = xp_net(pols[0]); |
| 1618 | struct xfrm_state *xfrm[XFRM_MAX_DEPTH]; |
| 1619 | struct dst_entry *dst; |
| 1620 | struct xfrm_dst *xdst; |
| 1621 | int err; |
| 1622 | |
| 1623 | /* Try to instantiate a bundle */ |
| 1624 | err = xfrm_tmpl_resolve(pols, num_pols, fl, xfrm, family); |
Timo Teräs | d809ec8 | 2010-07-12 21:29:42 +0000 | [diff] [blame] | 1625 | if (err <= 0) { |
| 1626 | if (err != 0 && err != -EAGAIN) |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1627 | XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLERROR); |
| 1628 | return ERR_PTR(err); |
| 1629 | } |
| 1630 | |
| 1631 | dst = xfrm_bundle_create(pols[0], xfrm, err, fl, dst_orig); |
| 1632 | if (IS_ERR(dst)) { |
| 1633 | XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTBUNDLEGENERROR); |
| 1634 | return ERR_CAST(dst); |
| 1635 | } |
| 1636 | |
| 1637 | xdst = (struct xfrm_dst *)dst; |
| 1638 | xdst->num_xfrms = err; |
| 1639 | if (num_pols > 1) |
| 1640 | err = xfrm_dst_update_parent(dst, &pols[1]->selector); |
| 1641 | else |
| 1642 | err = xfrm_dst_update_origin(dst, fl); |
| 1643 | if (unlikely(err)) { |
| 1644 | dst_free(dst); |
| 1645 | XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTBUNDLECHECKERROR); |
| 1646 | return ERR_PTR(err); |
| 1647 | } |
| 1648 | |
| 1649 | xdst->num_pols = num_pols; |
| 1650 | memcpy(xdst->pols, pols, sizeof(struct xfrm_policy*) * num_pols); |
| 1651 | xdst->policy_genid = atomic_read(&pols[0]->genid); |
| 1652 | |
| 1653 | return xdst; |
| 1654 | } |
| 1655 | |
| 1656 | static struct flow_cache_object * |
David S. Miller | dee9f4b | 2011-02-22 18:44:31 -0800 | [diff] [blame] | 1657 | xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir, |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1658 | struct flow_cache_object *oldflo, void *ctx) |
| 1659 | { |
| 1660 | struct dst_entry *dst_orig = (struct dst_entry *)ctx; |
| 1661 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
| 1662 | struct xfrm_dst *xdst, *new_xdst; |
| 1663 | int num_pols = 0, num_xfrms = 0, i, err, pol_dead; |
| 1664 | |
| 1665 | /* Check if the policies from old bundle are usable */ |
| 1666 | xdst = NULL; |
| 1667 | if (oldflo) { |
| 1668 | xdst = container_of(oldflo, struct xfrm_dst, flo); |
| 1669 | num_pols = xdst->num_pols; |
| 1670 | num_xfrms = xdst->num_xfrms; |
| 1671 | pol_dead = 0; |
| 1672 | for (i = 0; i < num_pols; i++) { |
| 1673 | pols[i] = xdst->pols[i]; |
| 1674 | pol_dead |= pols[i]->walk.dead; |
| 1675 | } |
| 1676 | if (pol_dead) { |
| 1677 | dst_free(&xdst->u.dst); |
| 1678 | xdst = NULL; |
| 1679 | num_pols = 0; |
| 1680 | num_xfrms = 0; |
| 1681 | oldflo = NULL; |
| 1682 | } |
| 1683 | } |
| 1684 | |
| 1685 | /* Resolve policies to use if we couldn't get them from |
| 1686 | * previous cache entry */ |
| 1687 | if (xdst == NULL) { |
| 1688 | num_pols = 1; |
| 1689 | pols[0] = __xfrm_policy_lookup(net, fl, family, dir); |
| 1690 | err = xfrm_expand_policies(fl, family, pols, |
| 1691 | &num_pols, &num_xfrms); |
| 1692 | if (err < 0) |
| 1693 | goto inc_error; |
| 1694 | if (num_pols == 0) |
| 1695 | return NULL; |
| 1696 | if (num_xfrms <= 0) |
| 1697 | goto make_dummy_bundle; |
| 1698 | } |
| 1699 | |
| 1700 | new_xdst = xfrm_resolve_and_create_bundle(pols, num_pols, fl, family, dst_orig); |
| 1701 | if (IS_ERR(new_xdst)) { |
| 1702 | err = PTR_ERR(new_xdst); |
| 1703 | if (err != -EAGAIN) |
| 1704 | goto error; |
| 1705 | if (oldflo == NULL) |
| 1706 | goto make_dummy_bundle; |
| 1707 | dst_hold(&xdst->u.dst); |
| 1708 | return oldflo; |
Timo Teräs | d809ec8 | 2010-07-12 21:29:42 +0000 | [diff] [blame] | 1709 | } else if (new_xdst == NULL) { |
| 1710 | num_xfrms = 0; |
| 1711 | if (oldflo == NULL) |
| 1712 | goto make_dummy_bundle; |
| 1713 | xdst->num_xfrms = 0; |
| 1714 | dst_hold(&xdst->u.dst); |
| 1715 | return oldflo; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1716 | } |
| 1717 | |
| 1718 | /* Kill the previous bundle */ |
| 1719 | if (xdst) { |
| 1720 | /* The policies were stolen for newly generated bundle */ |
| 1721 | xdst->num_pols = 0; |
| 1722 | dst_free(&xdst->u.dst); |
| 1723 | } |
| 1724 | |
| 1725 | /* Flow cache does not have reference, it dst_free()'s, |
| 1726 | * but we do need to return one reference for original caller */ |
| 1727 | dst_hold(&new_xdst->u.dst); |
| 1728 | return &new_xdst->flo; |
| 1729 | |
| 1730 | make_dummy_bundle: |
| 1731 | /* We found policies, but there's no bundles to instantiate: |
| 1732 | * either because the policy blocks, has no transformations or |
| 1733 | * we could not build template (no xfrm_states).*/ |
| 1734 | xdst = xfrm_alloc_dst(net, family); |
| 1735 | if (IS_ERR(xdst)) { |
| 1736 | xfrm_pols_put(pols, num_pols); |
| 1737 | return ERR_CAST(xdst); |
| 1738 | } |
| 1739 | xdst->num_pols = num_pols; |
| 1740 | xdst->num_xfrms = num_xfrms; |
| 1741 | memcpy(xdst->pols, pols, sizeof(struct xfrm_policy*) * num_pols); |
| 1742 | |
| 1743 | dst_hold(&xdst->u.dst); |
| 1744 | return &xdst->flo; |
| 1745 | |
| 1746 | inc_error: |
| 1747 | XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLERROR); |
| 1748 | error: |
| 1749 | if (xdst != NULL) |
| 1750 | dst_free(&xdst->u.dst); |
| 1751 | else |
| 1752 | xfrm_pols_put(pols, num_pols); |
| 1753 | return ERR_PTR(err); |
| 1754 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 1756 | static struct dst_entry *make_blackhole(struct net *net, u16 family, |
| 1757 | struct dst_entry *dst_orig) |
| 1758 | { |
| 1759 | struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); |
| 1760 | struct dst_entry *ret; |
| 1761 | |
| 1762 | if (!afinfo) { |
| 1763 | dst_release(dst_orig); |
| 1764 | ret = ERR_PTR(-EINVAL); |
| 1765 | } else { |
| 1766 | ret = afinfo->blackhole_route(net, dst_orig); |
| 1767 | } |
| 1768 | xfrm_policy_put_afinfo(afinfo); |
| 1769 | |
| 1770 | return ret; |
| 1771 | } |
| 1772 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | /* Main function: finds/creates a bundle for given flow. |
| 1774 | * |
| 1775 | * At the moment we eat a raw IP route. Mostly to speed up lookups |
| 1776 | * on interfaces with disabled IPsec. |
| 1777 | */ |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 1778 | struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig, |
| 1779 | const struct flowi *fl, |
| 1780 | struct sock *sk, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | { |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1782 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1783 | struct flow_cache_object *flo; |
| 1784 | struct xfrm_dst *xdst; |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 1785 | struct dst_entry *dst, *route; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1786 | u16 family = dst_orig->ops->family; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1787 | u8 dir = policy_to_flow_dir(XFRM_POLICY_OUT); |
Changli Gao | 4b02162 | 2010-04-27 21:20:22 +0000 | [diff] [blame] | 1788 | int i, err, num_pols, num_xfrms = 0, drop_pols = 0; |
Venkat Yekkirala | e0d1caa | 2006-07-24 23:29:07 -0700 | [diff] [blame] | 1789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | restart: |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1791 | dst = NULL; |
| 1792 | xdst = NULL; |
| 1793 | route = NULL; |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 1794 | |
Thomas Graf | f7944fb | 2007-08-25 13:46:55 -0700 | [diff] [blame] | 1795 | if (sk && sk->sk_policy[XFRM_POLICY_OUT]) { |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1796 | num_pols = 1; |
| 1797 | pols[0] = xfrm_sk_policy_lookup(sk, XFRM_POLICY_OUT, fl); |
| 1798 | err = xfrm_expand_policies(fl, family, pols, |
| 1799 | &num_pols, &num_xfrms); |
| 1800 | if (err < 0) |
Herbert Xu | 75b8c13 | 2007-12-11 04:38:08 -0800 | [diff] [blame] | 1801 | goto dropdst; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1802 | |
| 1803 | if (num_pols) { |
| 1804 | if (num_xfrms <= 0) { |
| 1805 | drop_pols = num_pols; |
| 1806 | goto no_transform; |
| 1807 | } |
| 1808 | |
| 1809 | xdst = xfrm_resolve_and_create_bundle( |
| 1810 | pols, num_pols, fl, |
| 1811 | family, dst_orig); |
| 1812 | if (IS_ERR(xdst)) { |
| 1813 | xfrm_pols_put(pols, num_pols); |
| 1814 | err = PTR_ERR(xdst); |
| 1815 | goto dropdst; |
Timo Teräs | d809ec8 | 2010-07-12 21:29:42 +0000 | [diff] [blame] | 1816 | } else if (xdst == NULL) { |
| 1817 | num_xfrms = 0; |
| 1818 | drop_pols = num_pols; |
| 1819 | goto no_transform; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1820 | } |
| 1821 | |
Steffen Klassert | fbd5060 | 2011-03-15 21:12:49 +0000 | [diff] [blame] | 1822 | dst_hold(&xdst->u.dst); |
| 1823 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1824 | spin_lock_bh(&xfrm_policy_sk_bundle_lock); |
| 1825 | xdst->u.dst.next = xfrm_policy_sk_bundles; |
| 1826 | xfrm_policy_sk_bundles = &xdst->u.dst; |
| 1827 | spin_unlock_bh(&xfrm_policy_sk_bundle_lock); |
| 1828 | |
| 1829 | route = xdst->route; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 1830 | } |
Venkat Yekkirala | 3bccfbc | 2006-10-05 15:42:35 -0500 | [diff] [blame] | 1831 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1833 | if (xdst == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | /* To accelerate a bit... */ |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 1835 | if ((dst_orig->flags & DST_NOXFRM) || |
Alexey Dobriyan | 52479b6 | 2008-11-25 17:35:18 -0800 | [diff] [blame] | 1836 | !net->xfrm.policy_count[XFRM_POLICY_OUT]) |
Herbert Xu | 8b7817f | 2007-12-12 10:44:43 -0800 | [diff] [blame] | 1837 | goto nopol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1839 | flo = flow_cache_lookup(net, fl, family, dir, |
| 1840 | xfrm_bundle_lookup, dst_orig); |
| 1841 | if (flo == NULL) |
| 1842 | goto nopol; |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 1843 | if (IS_ERR(flo)) { |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1844 | err = PTR_ERR(flo); |
Herbert Xu | 75b8c13 | 2007-12-11 04:38:08 -0800 | [diff] [blame] | 1845 | goto dropdst; |
Masahide NAKAMURA | d66e37a | 2008-01-07 21:46:15 -0800 | [diff] [blame] | 1846 | } |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1847 | xdst = container_of(flo, struct xfrm_dst, flo); |
| 1848 | |
| 1849 | num_pols = xdst->num_pols; |
| 1850 | num_xfrms = xdst->num_xfrms; |
| 1851 | memcpy(pols, xdst->pols, sizeof(struct xfrm_policy*) * num_pols); |
| 1852 | route = xdst->route; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | } |
| 1854 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1855 | dst = &xdst->u.dst; |
| 1856 | if (route == NULL && num_xfrms > 0) { |
| 1857 | /* The only case when xfrm_bundle_lookup() returns a |
| 1858 | * bundle with null route, is when the template could |
| 1859 | * not be resolved. It means policies are there, but |
| 1860 | * bundle could not be created, since we don't yet |
| 1861 | * have the xfrm_state's. We need to wait for KM to |
| 1862 | * negotiate new SA's or bail out with error.*/ |
| 1863 | if (net->xfrm.sysctl_larval_drop) { |
| 1864 | /* EREMOTE tells the caller to generate |
| 1865 | * a one-shot blackhole route. */ |
| 1866 | dst_release(dst); |
Timo Teras | a1aa348 | 2010-05-15 23:49:26 -0700 | [diff] [blame] | 1867 | xfrm_pols_put(pols, drop_pols); |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1868 | XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTNOSTATES); |
David S. Miller | 2774c13 | 2011-03-01 14:59:04 -0800 | [diff] [blame] | 1869 | |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 1870 | return make_blackhole(net, family, dst_orig); |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1871 | } |
David S. Miller | 1d28f42 | 2011-03-12 00:29:39 -0500 | [diff] [blame] | 1872 | if (fl->flowi_flags & FLOWI_FLAG_CAN_SLEEP) { |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1873 | DECLARE_WAITQUEUE(wait, current); |
| 1874 | |
| 1875 | add_wait_queue(&net->xfrm.km_waitq, &wait); |
| 1876 | set_current_state(TASK_INTERRUPTIBLE); |
| 1877 | schedule(); |
| 1878 | set_current_state(TASK_RUNNING); |
| 1879 | remove_wait_queue(&net->xfrm.km_waitq, &wait); |
| 1880 | |
| 1881 | if (!signal_pending(current)) { |
| 1882 | dst_release(dst); |
| 1883 | goto restart; |
| 1884 | } |
| 1885 | |
| 1886 | err = -ERESTART; |
| 1887 | } else |
| 1888 | err = -EAGAIN; |
| 1889 | |
| 1890 | XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTNOSTATES); |
| 1891 | goto error; |
| 1892 | } |
| 1893 | |
| 1894 | no_transform: |
| 1895 | if (num_pols == 0) |
Herbert Xu | 8b7817f | 2007-12-12 10:44:43 -0800 | [diff] [blame] | 1896 | goto nopol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1898 | if ((flags & XFRM_LOOKUP_ICMP) && |
| 1899 | !(pols[0]->flags & XFRM_POLICY_ICMP)) { |
| 1900 | err = -ENOENT; |
Herbert Xu | 8b7817f | 2007-12-12 10:44:43 -0800 | [diff] [blame] | 1901 | goto error; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1902 | } |
Herbert Xu | 8b7817f | 2007-12-12 10:44:43 -0800 | [diff] [blame] | 1903 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1904 | for (i = 0; i < num_pols; i++) |
| 1905 | pols[i]->curlft.use_time = get_seconds(); |
Herbert Xu | 8b7817f | 2007-12-12 10:44:43 -0800 | [diff] [blame] | 1906 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1907 | if (num_xfrms < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | /* Prohibit the flow */ |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 1909 | XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLBLOCK); |
Patrick McHardy | e104411b | 2005-09-08 15:11:55 -0700 | [diff] [blame] | 1910 | err = -EPERM; |
| 1911 | goto error; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1912 | } else if (num_xfrms > 0) { |
| 1913 | /* Flow transformed */ |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1914 | dst_release(dst_orig); |
| 1915 | } else { |
| 1916 | /* Flow passes untransformed */ |
| 1917 | dst_release(dst); |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 1918 | dst = dst_orig; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | } |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1920 | ok: |
| 1921 | xfrm_pols_put(pols, drop_pols); |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 1922 | return dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1924 | nopol: |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 1925 | if (!(flags & XFRM_LOOKUP_ICMP)) { |
| 1926 | dst = dst_orig; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1927 | goto ok; |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 1928 | } |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1929 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | error: |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1931 | dst_release(dst); |
Herbert Xu | 75b8c13 | 2007-12-11 04:38:08 -0800 | [diff] [blame] | 1932 | dropdst: |
| 1933 | dst_release(dst_orig); |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 1934 | xfrm_pols_put(pols, drop_pols); |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 1935 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | } |
| 1937 | EXPORT_SYMBOL(xfrm_lookup); |
| 1938 | |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 1939 | static inline int |
David S. Miller | 8f029de | 2011-02-22 17:59:59 -0800 | [diff] [blame] | 1940 | xfrm_secpath_reject(int idx, struct sk_buff *skb, const struct flowi *fl) |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 1941 | { |
| 1942 | struct xfrm_state *x; |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 1943 | |
| 1944 | if (!skb->sp || idx < 0 || idx >= skb->sp->len) |
| 1945 | return 0; |
| 1946 | x = skb->sp->xvec[idx]; |
| 1947 | if (!x->type->reject) |
| 1948 | return 0; |
Herbert Xu | 1ecafed | 2007-10-09 13:24:07 -0700 | [diff] [blame] | 1949 | return x->type->reject(x, skb, fl); |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 1950 | } |
| 1951 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | /* When skb is transformed back to its "native" form, we have to |
| 1953 | * check policy restrictions. At the moment we make this in maximally |
| 1954 | * stupid way. Shame on me. :-) Of course, connected sockets must |
| 1955 | * have policy cached at them. |
| 1956 | */ |
| 1957 | |
| 1958 | static inline int |
David S. Miller | 7db454b | 2011-02-24 01:43:01 -0500 | [diff] [blame] | 1959 | xfrm_state_ok(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1960 | unsigned short family) |
| 1961 | { |
| 1962 | if (xfrm_state_kern(x)) |
Kazunori MIYAZAWA | 928ba41 | 2007-02-13 12:57:16 -0800 | [diff] [blame] | 1963 | return tmpl->optional && !xfrm_state_addr_cmp(tmpl, x, tmpl->encap_family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | return x->id.proto == tmpl->id.proto && |
| 1965 | (x->id.spi == tmpl->id.spi || !tmpl->id.spi) && |
| 1966 | (x->props.reqid == tmpl->reqid || !tmpl->reqid) && |
| 1967 | x->props.mode == tmpl->mode && |
Herbert Xu | c5d18e9 | 2008-04-22 00:46:42 -0700 | [diff] [blame] | 1968 | (tmpl->allalgs || (tmpl->aalgos & (1<<x->props.aalgo)) || |
Masahide NAKAMURA | f3bd484 | 2006-08-23 18:00:48 -0700 | [diff] [blame] | 1969 | !(xfrm_id_proto_match(tmpl->id.proto, IPSEC_PROTO_ANY))) && |
Masahide NAKAMURA | 7e49e6d | 2006-09-22 15:05:15 -0700 | [diff] [blame] | 1970 | !(x->props.mode != XFRM_MODE_TRANSPORT && |
| 1971 | xfrm_state_addr_cmp(tmpl, x, family)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1972 | } |
| 1973 | |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 1974 | /* |
| 1975 | * 0 or more than 0 is returned when validation is succeeded (either bypass |
| 1976 | * because of optional transport mode, or next index of the mathced secpath |
| 1977 | * state with the template. |
| 1978 | * -1 is returned when no matching template is found. |
| 1979 | * Otherwise "-2 - errored_index" is returned. |
| 1980 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | static inline int |
David S. Miller | 22cccb7 | 2011-02-24 01:43:33 -0500 | [diff] [blame] | 1982 | xfrm_policy_ok(const struct xfrm_tmpl *tmpl, const struct sec_path *sp, int start, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | unsigned short family) |
| 1984 | { |
| 1985 | int idx = start; |
| 1986 | |
| 1987 | if (tmpl->optional) { |
Masahide NAKAMURA | 7e49e6d | 2006-09-22 15:05:15 -0700 | [diff] [blame] | 1988 | if (tmpl->mode == XFRM_MODE_TRANSPORT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | return start; |
| 1990 | } else |
| 1991 | start = -1; |
| 1992 | for (; idx < sp->len; idx++) { |
Herbert Xu | dbe5b4a | 2006-04-01 00:54:16 -0800 | [diff] [blame] | 1993 | if (xfrm_state_ok(tmpl, sp->xvec[idx], family)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | return ++idx; |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 1995 | if (sp->xvec[idx]->props.mode != XFRM_MODE_TRANSPORT) { |
| 1996 | if (start == -1) |
| 1997 | start = -2-idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1998 | break; |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 1999 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | } |
| 2001 | return start; |
| 2002 | } |
| 2003 | |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 2004 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
| 2005 | unsigned int family, int reverse) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | { |
| 2007 | struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); |
Venkat Yekkirala | e0d1caa | 2006-07-24 23:29:07 -0700 | [diff] [blame] | 2008 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | |
| 2010 | if (unlikely(afinfo == NULL)) |
| 2011 | return -EAFNOSUPPORT; |
| 2012 | |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 2013 | afinfo->decode_session(skb, fl, reverse); |
David S. Miller | 1d28f42 | 2011-03-12 00:29:39 -0500 | [diff] [blame] | 2014 | err = security_xfrm_decode_session(skb, &fl->flowi_secid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | xfrm_policy_put_afinfo(afinfo); |
Venkat Yekkirala | e0d1caa | 2006-07-24 23:29:07 -0700 | [diff] [blame] | 2016 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | } |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 2018 | EXPORT_SYMBOL(__xfrm_decode_session); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | |
David S. Miller | 9a7386e | 2011-02-24 01:44:12 -0500 | [diff] [blame] | 2020 | static inline int secpath_has_nontransport(const struct sec_path *sp, int k, int *idxp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | { |
| 2022 | for (; k < sp->len; k++) { |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 2023 | if (sp->xvec[k]->props.mode != XFRM_MODE_TRANSPORT) { |
James Morris | d1d9fac | 2006-09-01 00:32:12 -0700 | [diff] [blame] | 2024 | *idxp = k; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | return 1; |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 2026 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2027 | } |
| 2028 | |
| 2029 | return 0; |
| 2030 | } |
| 2031 | |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 2032 | int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | unsigned short family) |
| 2034 | { |
Alexey Dobriyan | f6e1e25 | 2008-11-25 17:35:44 -0800 | [diff] [blame] | 2035 | struct net *net = dev_net(skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | struct xfrm_policy *pol; |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2037 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
| 2038 | int npols = 0; |
| 2039 | int xfrm_nr; |
| 2040 | int pi; |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 2041 | int reverse; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | struct flowi fl; |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 2043 | u8 fl_dir; |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 2044 | int xerr_idx = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | |
Herbert Xu | d5422ef | 2007-12-12 10:44:16 -0800 | [diff] [blame] | 2046 | reverse = dir & ~XFRM_POLICY_MASK; |
| 2047 | dir &= XFRM_POLICY_MASK; |
| 2048 | fl_dir = policy_to_flow_dir(dir); |
| 2049 | |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2050 | if (__xfrm_decode_session(skb, &fl, family, reverse) < 0) { |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2051 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | return 0; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2053 | } |
| 2054 | |
Patrick McHardy | eb9c7eb | 2006-01-06 23:06:30 -0800 | [diff] [blame] | 2055 | nf_nat_decode_session(skb, &fl, family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | |
| 2057 | /* First, check used SA against their selectors. */ |
| 2058 | if (skb->sp) { |
| 2059 | int i; |
| 2060 | |
| 2061 | for (i=skb->sp->len-1; i>=0; i--) { |
Herbert Xu | dbe5b4a | 2006-04-01 00:54:16 -0800 | [diff] [blame] | 2062 | struct xfrm_state *x = skb->sp->xvec[i]; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2063 | if (!xfrm_selector_match(&x->sel, &fl, family)) { |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2064 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMISMATCH); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | return 0; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2066 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | } |
| 2068 | } |
| 2069 | |
| 2070 | pol = NULL; |
Venkat Yekkirala | 3bccfbc | 2006-10-05 15:42:35 -0500 | [diff] [blame] | 2071 | if (sk && sk->sk_policy[dir]) { |
Venkat Yekkirala | e0d1caa | 2006-07-24 23:29:07 -0700 | [diff] [blame] | 2072 | pol = xfrm_sk_policy_lookup(sk, dir, &fl); |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2073 | if (IS_ERR(pol)) { |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2074 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLERROR); |
Venkat Yekkirala | 3bccfbc | 2006-10-05 15:42:35 -0500 | [diff] [blame] | 2075 | return 0; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2076 | } |
Venkat Yekkirala | 3bccfbc | 2006-10-05 15:42:35 -0500 | [diff] [blame] | 2077 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | |
Timo Teräs | fe1a5f0 | 2010-04-07 00:30:04 +0000 | [diff] [blame] | 2079 | if (!pol) { |
| 2080 | struct flow_cache_object *flo; |
| 2081 | |
| 2082 | flo = flow_cache_lookup(net, &fl, family, fl_dir, |
| 2083 | xfrm_policy_lookup, NULL); |
| 2084 | if (IS_ERR_OR_NULL(flo)) |
| 2085 | pol = ERR_CAST(flo); |
| 2086 | else |
| 2087 | pol = container_of(flo, struct xfrm_policy, flo); |
| 2088 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2090 | if (IS_ERR(pol)) { |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2091 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLERROR); |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 2092 | return 0; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2093 | } |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 2094 | |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 2095 | if (!pol) { |
James Morris | d1d9fac | 2006-09-01 00:32:12 -0700 | [diff] [blame] | 2096 | if (skb->sp && secpath_has_nontransport(skb->sp, 0, &xerr_idx)) { |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 2097 | xfrm_secpath_reject(xerr_idx, skb, &fl); |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2098 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOPOLS); |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 2099 | return 0; |
| 2100 | } |
| 2101 | return 1; |
| 2102 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | |
James Morris | 9d729f7 | 2007-03-04 16:12:44 -0800 | [diff] [blame] | 2104 | pol->curlft.use_time = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2106 | pols[0] = pol; |
| 2107 | npols ++; |
| 2108 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 2109 | if (pols[0]->type != XFRM_POLICY_TYPE_MAIN) { |
Alexey Dobriyan | f6e1e25 | 2008-11-25 17:35:44 -0800 | [diff] [blame] | 2110 | pols[1] = xfrm_policy_lookup_bytype(net, XFRM_POLICY_TYPE_MAIN, |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2111 | &fl, family, |
| 2112 | XFRM_POLICY_IN); |
| 2113 | if (pols[1]) { |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2114 | if (IS_ERR(pols[1])) { |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2115 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLERROR); |
James Morris | 134b0fc | 2006-10-05 15:42:27 -0500 | [diff] [blame] | 2116 | return 0; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2117 | } |
James Morris | 9d729f7 | 2007-03-04 16:12:44 -0800 | [diff] [blame] | 2118 | pols[1]->curlft.use_time = get_seconds(); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2119 | npols ++; |
| 2120 | } |
| 2121 | } |
| 2122 | #endif |
| 2123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | if (pol->action == XFRM_POLICY_ALLOW) { |
| 2125 | struct sec_path *sp; |
| 2126 | static struct sec_path dummy; |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2127 | struct xfrm_tmpl *tp[XFRM_MAX_DEPTH]; |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 2128 | struct xfrm_tmpl *stp[XFRM_MAX_DEPTH]; |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2129 | struct xfrm_tmpl **tpp = tp; |
| 2130 | int ti = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | int i, k; |
| 2132 | |
| 2133 | if ((sp = skb->sp) == NULL) |
| 2134 | sp = &dummy; |
| 2135 | |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2136 | for (pi = 0; pi < npols; pi++) { |
| 2137 | if (pols[pi] != pol && |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2138 | pols[pi]->action != XFRM_POLICY_ALLOW) { |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2139 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLBLOCK); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2140 | goto reject; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2141 | } |
| 2142 | if (ti + pols[pi]->xfrm_nr >= XFRM_MAX_DEPTH) { |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2143 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2144 | goto reject_error; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2145 | } |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2146 | for (i = 0; i < pols[pi]->xfrm_nr; i++) |
| 2147 | tpp[ti++] = &pols[pi]->xfrm_vec[i]; |
| 2148 | } |
| 2149 | xfrm_nr = ti; |
Masahide NAKAMURA | 41a49cc | 2006-08-23 22:48:31 -0700 | [diff] [blame] | 2150 | if (npols > 1) { |
| 2151 | xfrm_tmpl_sort(stp, tpp, xfrm_nr, family); |
| 2152 | tpp = stp; |
| 2153 | } |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | /* For each tunnel xfrm, find the first matching tmpl. |
| 2156 | * For each tmpl before that, find corresponding xfrm. |
| 2157 | * Order is _important_. Later we will implement |
| 2158 | * some barriers, but at the moment barriers |
| 2159 | * are implied between each two transformations. |
| 2160 | */ |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2161 | for (i = xfrm_nr-1, k = 0; i >= 0; i--) { |
| 2162 | k = xfrm_policy_ok(tpp[i], sp, k, family); |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 2163 | if (k < 0) { |
James Morris | d1d9fac | 2006-09-01 00:32:12 -0700 | [diff] [blame] | 2164 | if (k < -1) |
| 2165 | /* "-2 - errored_index" returned */ |
| 2166 | xerr_idx = -(2+k); |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2167 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINTMPLMISMATCH); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | goto reject; |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 2169 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | } |
| 2171 | |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2172 | if (secpath_has_nontransport(sp, k, &xerr_idx)) { |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2173 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINTMPLMISMATCH); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | goto reject; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2175 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2177 | xfrm_pols_put(pols, npols); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | return 1; |
| 2179 | } |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2180 | XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | |
| 2182 | reject: |
Masahide NAKAMURA | df0ba92 | 2006-08-23 20:41:00 -0700 | [diff] [blame] | 2183 | xfrm_secpath_reject(xerr_idx, skb, &fl); |
Masahide NAKAMURA | 4e81bb8 | 2006-08-23 22:43:30 -0700 | [diff] [blame] | 2184 | reject_error: |
| 2185 | xfrm_pols_put(pols, npols); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | return 0; |
| 2187 | } |
| 2188 | EXPORT_SYMBOL(__xfrm_policy_check); |
| 2189 | |
| 2190 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family) |
| 2191 | { |
Alexey Dobriyan | 99a6665 | 2008-11-25 17:36:13 -0800 | [diff] [blame] | 2192 | struct net *net = dev_net(skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | struct flowi fl; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2194 | struct dst_entry *dst; |
Eric Dumazet | 7313714 | 2011-03-15 15:26:43 -0700 | [diff] [blame] | 2195 | int res = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2197 | if (xfrm_decode_session(skb, &fl, family) < 0) { |
jamal | 72032fd | 2010-02-18 03:35:07 +0000 | [diff] [blame] | 2198 | XFRM_INC_STATS(net, LINUX_MIB_XFRMFWDHDRERROR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | return 0; |
Masahide NAKAMURA | 0aa6477 | 2007-12-20 20:43:36 -0800 | [diff] [blame] | 2200 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | |
Eric Dumazet | fafeeb6 | 2010-06-01 10:04:49 +0000 | [diff] [blame] | 2202 | skb_dst_force(skb); |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2203 | |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 2204 | dst = xfrm_lookup(net, skb_dst(skb), &fl, NULL, 0); |
| 2205 | if (IS_ERR(dst)) { |
Eric Dumazet | 7313714 | 2011-03-15 15:26:43 -0700 | [diff] [blame] | 2206 | res = 0; |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 2207 | dst = NULL; |
| 2208 | } |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 2209 | skb_dst_set(skb, dst); |
| 2210 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | } |
| 2212 | EXPORT_SYMBOL(__xfrm_route_forward); |
| 2213 | |
David S. Miller | d49c73c | 2006-08-13 18:55:53 -0700 | [diff] [blame] | 2214 | /* Optimize later using cookies and generation ids. */ |
| 2215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | static struct dst_entry *xfrm_dst_check(struct dst_entry *dst, u32 cookie) |
| 2217 | { |
David S. Miller | d49c73c | 2006-08-13 18:55:53 -0700 | [diff] [blame] | 2218 | /* Code (such as __xfrm4_bundle_create()) sets dst->obsolete |
| 2219 | * to "-1" to force all XFRM destinations to get validated by |
| 2220 | * dst_ops->check on every use. We do this because when a |
| 2221 | * normal route referenced by an XFRM dst is obsoleted we do |
| 2222 | * not go looking around for all parent referencing XFRM dsts |
| 2223 | * so that we can invalidate them. It is just too much work. |
| 2224 | * Instead we make the checks here on every use. For example: |
| 2225 | * |
| 2226 | * XFRM dst A --> IPv4 dst X |
| 2227 | * |
| 2228 | * X is the "xdst->route" of A (X is also the "dst->path" of A |
| 2229 | * in this example). If X is marked obsolete, "A" will not |
| 2230 | * notice. That's what we are validating here via the |
| 2231 | * stale_bundle() check. |
| 2232 | * |
| 2233 | * When a policy's bundle is pruned, we dst_free() the XFRM |
| 2234 | * dst which causes it's ->obsolete field to be set to a |
| 2235 | * positive non-zero integer. If an XFRM dst has been pruned |
| 2236 | * like this, we want to force a new route lookup. |
David S. Miller | 399c180 | 2005-12-19 14:23:23 -0800 | [diff] [blame] | 2237 | */ |
David S. Miller | d49c73c | 2006-08-13 18:55:53 -0700 | [diff] [blame] | 2238 | if (dst->obsolete < 0 && !stale_bundle(dst)) |
| 2239 | return dst; |
| 2240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2241 | return NULL; |
| 2242 | } |
| 2243 | |
| 2244 | static int stale_bundle(struct dst_entry *dst) |
| 2245 | { |
Steffen Klassert | 12fdb4d | 2011-06-29 23:18:20 +0000 | [diff] [blame] | 2246 | return !xfrm_bundle_ok((struct xfrm_dst *)dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2247 | } |
| 2248 | |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 2249 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | while ((dst = dst->child) && dst->xfrm && dst->dev == dev) { |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 2252 | dst->dev = dev_net(dev)->loopback_dev; |
Daniel Lezcano | de3cb74 | 2007-09-25 19:16:28 -0700 | [diff] [blame] | 2253 | dev_hold(dst->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | dev_put(dev); |
| 2255 | } |
| 2256 | } |
Herbert Xu | aabc976 | 2005-05-03 16:27:10 -0700 | [diff] [blame] | 2257 | EXPORT_SYMBOL(xfrm_dst_ifdown); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | |
| 2259 | static void xfrm_link_failure(struct sk_buff *skb) |
| 2260 | { |
| 2261 | /* Impossible. Such dst must be popped before reaches point of failure. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | } |
| 2263 | |
| 2264 | static struct dst_entry *xfrm_negative_advice(struct dst_entry *dst) |
| 2265 | { |
| 2266 | if (dst) { |
| 2267 | if (dst->obsolete) { |
| 2268 | dst_release(dst); |
| 2269 | dst = NULL; |
| 2270 | } |
| 2271 | } |
| 2272 | return dst; |
| 2273 | } |
| 2274 | |
Alexey Dobriyan | ddcfd79 | 2008-11-25 17:37:23 -0800 | [diff] [blame] | 2275 | static void __xfrm_garbage_collect(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | { |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 2277 | struct dst_entry *head, *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 2279 | flow_cache_flush(); |
| 2280 | |
| 2281 | spin_lock_bh(&xfrm_policy_sk_bundle_lock); |
| 2282 | head = xfrm_policy_sk_bundles; |
| 2283 | xfrm_policy_sk_bundles = NULL; |
| 2284 | spin_unlock_bh(&xfrm_policy_sk_bundle_lock); |
| 2285 | |
| 2286 | while (head) { |
| 2287 | next = head->next; |
| 2288 | dst_free(head); |
| 2289 | head = next; |
| 2290 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | } |
| 2292 | |
Herbert Xu | 25ee328 | 2007-12-11 09:32:34 -0800 | [diff] [blame] | 2293 | static void xfrm_init_pmtu(struct dst_entry *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | { |
| 2295 | do { |
| 2296 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 2297 | u32 pmtu, route_mtu_cached; |
| 2298 | |
| 2299 | pmtu = dst_mtu(dst->child); |
| 2300 | xdst->child_mtu_cached = pmtu; |
| 2301 | |
| 2302 | pmtu = xfrm_state_mtu(dst->xfrm, pmtu); |
| 2303 | |
| 2304 | route_mtu_cached = dst_mtu(xdst->route); |
| 2305 | xdst->route_mtu_cached = route_mtu_cached; |
| 2306 | |
| 2307 | if (pmtu > route_mtu_cached) |
| 2308 | pmtu = route_mtu_cached; |
| 2309 | |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 2310 | dst_metric_set(dst, RTAX_MTU, pmtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2311 | } while ((dst = dst->next)); |
| 2312 | } |
| 2313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | /* Check that the bundle accepts the flow and its components are |
| 2315 | * still valid. |
| 2316 | */ |
| 2317 | |
Steffen Klassert | 12fdb4d | 2011-06-29 23:18:20 +0000 | [diff] [blame] | 2318 | static int xfrm_bundle_ok(struct xfrm_dst *first) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | { |
| 2320 | struct dst_entry *dst = &first->u.dst; |
| 2321 | struct xfrm_dst *last; |
| 2322 | u32 mtu; |
| 2323 | |
Hideaki YOSHIFUJI | 92d63de | 2005-05-26 12:58:04 -0700 | [diff] [blame] | 2324 | if (!dst_check(dst->path, ((struct xfrm_dst *)dst)->path_cookie) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2325 | (dst->dev && !netif_running(dst->dev))) |
| 2326 | return 0; |
| 2327 | |
| 2328 | last = NULL; |
| 2329 | |
| 2330 | do { |
| 2331 | struct xfrm_dst *xdst = (struct xfrm_dst *)dst; |
| 2332 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2333 | if (dst->xfrm->km.state != XFRM_STATE_VALID) |
| 2334 | return 0; |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 2335 | if (xdst->xfrm_genid != dst->xfrm->genid) |
| 2336 | return 0; |
Timo Teräs | b1312c8 | 2010-06-24 14:35:00 -0700 | [diff] [blame] | 2337 | if (xdst->num_pols > 0 && |
| 2338 | xdst->policy_genid != atomic_read(&xdst->pols[0]->genid)) |
David S. Miller | 9d4a706 | 2006-08-24 03:18:09 -0700 | [diff] [blame] | 2339 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | |
| 2341 | mtu = dst_mtu(dst->child); |
| 2342 | if (xdst->child_mtu_cached != mtu) { |
| 2343 | last = xdst; |
| 2344 | xdst->child_mtu_cached = mtu; |
| 2345 | } |
| 2346 | |
Hideaki YOSHIFUJI | 92d63de | 2005-05-26 12:58:04 -0700 | [diff] [blame] | 2347 | if (!dst_check(xdst->route, xdst->route_cookie)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | return 0; |
| 2349 | mtu = dst_mtu(xdst->route); |
| 2350 | if (xdst->route_mtu_cached != mtu) { |
| 2351 | last = xdst; |
| 2352 | xdst->route_mtu_cached = mtu; |
| 2353 | } |
| 2354 | |
| 2355 | dst = dst->child; |
| 2356 | } while (dst->xfrm); |
| 2357 | |
| 2358 | if (likely(!last)) |
| 2359 | return 1; |
| 2360 | |
| 2361 | mtu = last->child_mtu_cached; |
| 2362 | for (;;) { |
| 2363 | dst = &last->u.dst; |
| 2364 | |
| 2365 | mtu = xfrm_state_mtu(dst->xfrm, mtu); |
| 2366 | if (mtu > last->route_mtu_cached) |
| 2367 | mtu = last->route_mtu_cached; |
David S. Miller | defb351 | 2010-12-08 21:16:57 -0800 | [diff] [blame] | 2368 | dst_metric_set(dst, RTAX_MTU, mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2369 | |
| 2370 | if (last == first) |
| 2371 | break; |
| 2372 | |
Patrick McHardy | bd0bf07 | 2007-07-18 01:55:52 -0700 | [diff] [blame] | 2373 | last = (struct xfrm_dst *)last->u.dst.next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | last->child_mtu_cached = mtu; |
| 2375 | } |
| 2376 | |
| 2377 | return 1; |
| 2378 | } |
| 2379 | |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 2380 | static unsigned int xfrm_default_advmss(const struct dst_entry *dst) |
| 2381 | { |
| 2382 | return dst_metric_advmss(dst->path); |
| 2383 | } |
| 2384 | |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 2385 | static unsigned int xfrm_default_mtu(const struct dst_entry *dst) |
| 2386 | { |
| 2387 | return dst_mtu(dst->path); |
| 2388 | } |
| 2389 | |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 2390 | static struct neighbour *xfrm_neigh_lookup(const struct dst_entry *dst, const void *daddr) |
| 2391 | { |
| 2392 | return dst_neigh_lookup(dst->path, daddr); |
| 2393 | } |
| 2394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo) |
| 2396 | { |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 2397 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2398 | int err = 0; |
| 2399 | if (unlikely(afinfo == NULL)) |
| 2400 | return -EINVAL; |
| 2401 | if (unlikely(afinfo->family >= NPROTO)) |
| 2402 | return -EAFNOSUPPORT; |
Ingo Molnar | e959d81 | 2006-04-28 15:32:29 -0700 | [diff] [blame] | 2403 | write_lock_bh(&xfrm_policy_afinfo_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | if (unlikely(xfrm_policy_afinfo[afinfo->family] != NULL)) |
| 2405 | err = -ENOBUFS; |
| 2406 | else { |
| 2407 | struct dst_ops *dst_ops = afinfo->dst_ops; |
| 2408 | if (likely(dst_ops->kmem_cachep == NULL)) |
| 2409 | dst_ops->kmem_cachep = xfrm_dst_cache; |
| 2410 | if (likely(dst_ops->check == NULL)) |
| 2411 | dst_ops->check = xfrm_dst_check; |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 2412 | if (likely(dst_ops->default_advmss == NULL)) |
| 2413 | dst_ops->default_advmss = xfrm_default_advmss; |
David S. Miller | d33e455 | 2010-12-14 13:01:14 -0800 | [diff] [blame] | 2414 | if (likely(dst_ops->default_mtu == NULL)) |
| 2415 | dst_ops->default_mtu = xfrm_default_mtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | if (likely(dst_ops->negative_advice == NULL)) |
| 2417 | dst_ops->negative_advice = xfrm_negative_advice; |
| 2418 | if (likely(dst_ops->link_failure == NULL)) |
| 2419 | dst_ops->link_failure = xfrm_link_failure; |
David S. Miller | d3aaeb3 | 2011-07-18 00:40:17 -0700 | [diff] [blame] | 2420 | if (likely(dst_ops->neigh_lookup == NULL)) |
| 2421 | dst_ops->neigh_lookup = xfrm_neigh_lookup; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | if (likely(afinfo->garbage_collect == NULL)) |
| 2423 | afinfo->garbage_collect = __xfrm_garbage_collect; |
| 2424 | xfrm_policy_afinfo[afinfo->family] = afinfo; |
| 2425 | } |
Ingo Molnar | e959d81 | 2006-04-28 15:32:29 -0700 | [diff] [blame] | 2426 | write_unlock_bh(&xfrm_policy_afinfo_lock); |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 2427 | |
| 2428 | rtnl_lock(); |
| 2429 | for_each_net(net) { |
| 2430 | struct dst_ops *xfrm_dst_ops; |
| 2431 | |
| 2432 | switch (afinfo->family) { |
| 2433 | case AF_INET: |
| 2434 | xfrm_dst_ops = &net->xfrm.xfrm4_dst_ops; |
| 2435 | break; |
| 2436 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 2437 | case AF_INET6: |
| 2438 | xfrm_dst_ops = &net->xfrm.xfrm6_dst_ops; |
| 2439 | break; |
| 2440 | #endif |
| 2441 | default: |
| 2442 | BUG(); |
| 2443 | } |
| 2444 | *xfrm_dst_ops = *afinfo->dst_ops; |
| 2445 | } |
| 2446 | rtnl_unlock(); |
| 2447 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | return err; |
| 2449 | } |
| 2450 | EXPORT_SYMBOL(xfrm_policy_register_afinfo); |
| 2451 | |
| 2452 | int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo) |
| 2453 | { |
| 2454 | int err = 0; |
| 2455 | if (unlikely(afinfo == NULL)) |
| 2456 | return -EINVAL; |
| 2457 | if (unlikely(afinfo->family >= NPROTO)) |
| 2458 | return -EAFNOSUPPORT; |
Ingo Molnar | e959d81 | 2006-04-28 15:32:29 -0700 | [diff] [blame] | 2459 | write_lock_bh(&xfrm_policy_afinfo_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2460 | if (likely(xfrm_policy_afinfo[afinfo->family] != NULL)) { |
| 2461 | if (unlikely(xfrm_policy_afinfo[afinfo->family] != afinfo)) |
| 2462 | err = -EINVAL; |
| 2463 | else { |
| 2464 | struct dst_ops *dst_ops = afinfo->dst_ops; |
| 2465 | xfrm_policy_afinfo[afinfo->family] = NULL; |
| 2466 | dst_ops->kmem_cachep = NULL; |
| 2467 | dst_ops->check = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | dst_ops->negative_advice = NULL; |
| 2469 | dst_ops->link_failure = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | afinfo->garbage_collect = NULL; |
| 2471 | } |
| 2472 | } |
Ingo Molnar | e959d81 | 2006-04-28 15:32:29 -0700 | [diff] [blame] | 2473 | write_unlock_bh(&xfrm_policy_afinfo_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | return err; |
| 2475 | } |
| 2476 | EXPORT_SYMBOL(xfrm_policy_unregister_afinfo); |
| 2477 | |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 2478 | static void __net_init xfrm_dst_ops_init(struct net *net) |
| 2479 | { |
| 2480 | struct xfrm_policy_afinfo *afinfo; |
| 2481 | |
| 2482 | read_lock_bh(&xfrm_policy_afinfo_lock); |
| 2483 | afinfo = xfrm_policy_afinfo[AF_INET]; |
| 2484 | if (afinfo) |
| 2485 | net->xfrm.xfrm4_dst_ops = *afinfo->dst_ops; |
| 2486 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 2487 | afinfo = xfrm_policy_afinfo[AF_INET6]; |
| 2488 | if (afinfo) |
| 2489 | net->xfrm.xfrm6_dst_ops = *afinfo->dst_ops; |
| 2490 | #endif |
| 2491 | read_unlock_bh(&xfrm_policy_afinfo_lock); |
| 2492 | } |
| 2493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | static struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family) |
| 2495 | { |
| 2496 | struct xfrm_policy_afinfo *afinfo; |
| 2497 | if (unlikely(family >= NPROTO)) |
| 2498 | return NULL; |
| 2499 | read_lock(&xfrm_policy_afinfo_lock); |
| 2500 | afinfo = xfrm_policy_afinfo[family]; |
Herbert Xu | 546be24 | 2006-05-27 23:03:58 -0700 | [diff] [blame] | 2501 | if (unlikely(!afinfo)) |
| 2502 | read_unlock(&xfrm_policy_afinfo_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | return afinfo; |
| 2504 | } |
| 2505 | |
| 2506 | static void xfrm_policy_put_afinfo(struct xfrm_policy_afinfo *afinfo) |
| 2507 | { |
Herbert Xu | 546be24 | 2006-05-27 23:03:58 -0700 | [diff] [blame] | 2508 | read_unlock(&xfrm_policy_afinfo_lock); |
| 2509 | } |
| 2510 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void *ptr) |
| 2512 | { |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 2513 | struct net_device *dev = ptr; |
| 2514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | switch (event) { |
| 2516 | case NETDEV_DOWN: |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 2517 | __xfrm_garbage_collect(dev_net(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | } |
| 2519 | return NOTIFY_DONE; |
| 2520 | } |
| 2521 | |
| 2522 | static struct notifier_block xfrm_dev_notifier = { |
Alexey Dobriyan | d5917a3 | 2008-10-31 00:41:59 -0700 | [diff] [blame] | 2523 | .notifier_call = xfrm_dev_event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | }; |
| 2525 | |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 2526 | #ifdef CONFIG_XFRM_STATISTICS |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2527 | static int __net_init xfrm_statistics_init(struct net *net) |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 2528 | { |
Alexey Dobriyan | c68cd1a | 2008-11-25 18:00:14 -0800 | [diff] [blame] | 2529 | int rv; |
| 2530 | |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 2531 | if (snmp_mib_init((void __percpu **)net->mib.xfrm_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 2532 | sizeof(struct linux_xfrm_mib), |
| 2533 | __alignof__(struct linux_xfrm_mib)) < 0) |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 2534 | return -ENOMEM; |
Alexey Dobriyan | c68cd1a | 2008-11-25 18:00:14 -0800 | [diff] [blame] | 2535 | rv = xfrm_proc_init(net); |
| 2536 | if (rv < 0) |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 2537 | snmp_mib_free((void __percpu **)net->mib.xfrm_statistics); |
Alexey Dobriyan | c68cd1a | 2008-11-25 18:00:14 -0800 | [diff] [blame] | 2538 | return rv; |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 2539 | } |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2540 | |
| 2541 | static void xfrm_statistics_fini(struct net *net) |
| 2542 | { |
Alexey Dobriyan | c68cd1a | 2008-11-25 18:00:14 -0800 | [diff] [blame] | 2543 | xfrm_proc_fini(net); |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 2544 | snmp_mib_free((void __percpu **)net->mib.xfrm_statistics); |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2545 | } |
| 2546 | #else |
| 2547 | static int __net_init xfrm_statistics_init(struct net *net) |
| 2548 | { |
| 2549 | return 0; |
| 2550 | } |
| 2551 | |
| 2552 | static void xfrm_statistics_fini(struct net *net) |
| 2553 | { |
| 2554 | } |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 2555 | #endif |
| 2556 | |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2557 | static int __net_init xfrm_policy_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | { |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 2559 | unsigned int hmask, sz; |
| 2560 | int dir; |
| 2561 | |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2562 | if (net_eq(net, &init_net)) |
| 2563 | xfrm_dst_cache = kmem_cache_create("xfrm_dst_cache", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2564 | sizeof(struct xfrm_dst), |
Alexey Dobriyan | e5d679f33 | 2006-08-26 19:25:52 -0700 | [diff] [blame] | 2565 | 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 2566 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2567 | |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 2568 | hmask = 8 - 1; |
| 2569 | sz = (hmask+1) * sizeof(struct hlist_head); |
| 2570 | |
Alexey Dobriyan | 93b851c | 2008-11-25 17:22:35 -0800 | [diff] [blame] | 2571 | net->xfrm.policy_byidx = xfrm_hash_alloc(sz); |
| 2572 | if (!net->xfrm.policy_byidx) |
| 2573 | goto out_byidx; |
Alexey Dobriyan | 8100bea | 2008-11-25 17:22:58 -0800 | [diff] [blame] | 2574 | net->xfrm.policy_idx_hmask = hmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 2575 | |
| 2576 | for (dir = 0; dir < XFRM_POLICY_MAX * 2; dir++) { |
| 2577 | struct xfrm_policy_hash *htab; |
| 2578 | |
Alexey Dobriyan | dc2caba | 2008-11-25 17:24:15 -0800 | [diff] [blame] | 2579 | net->xfrm.policy_count[dir] = 0; |
Alexey Dobriyan | 8b18f8e | 2008-11-25 17:23:26 -0800 | [diff] [blame] | 2580 | INIT_HLIST_HEAD(&net->xfrm.policy_inexact[dir]); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 2581 | |
Alexey Dobriyan | a35f6c5 | 2008-11-25 17:23:48 -0800 | [diff] [blame] | 2582 | htab = &net->xfrm.policy_bydst[dir]; |
David S. Miller | 44e36b4 | 2006-08-24 04:50:50 -0700 | [diff] [blame] | 2583 | htab->table = xfrm_hash_alloc(sz); |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 2584 | if (!htab->table) |
Alexey Dobriyan | a35f6c5 | 2008-11-25 17:23:48 -0800 | [diff] [blame] | 2585 | goto out_bydst; |
| 2586 | htab->hmask = hmask; |
David S. Miller | 2518c7c | 2006-08-24 04:45:07 -0700 | [diff] [blame] | 2587 | } |
| 2588 | |
Alexey Dobriyan | adfcf0b | 2008-11-25 17:22:11 -0800 | [diff] [blame] | 2589 | INIT_LIST_HEAD(&net->xfrm.policy_all); |
Alexey Dobriyan | 66caf62 | 2008-11-25 17:28:57 -0800 | [diff] [blame] | 2590 | INIT_WORK(&net->xfrm.policy_hash_work, xfrm_hash_resize); |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2591 | if (net_eq(net, &init_net)) |
| 2592 | register_netdevice_notifier(&xfrm_dev_notifier); |
| 2593 | return 0; |
Alexey Dobriyan | 93b851c | 2008-11-25 17:22:35 -0800 | [diff] [blame] | 2594 | |
Alexey Dobriyan | a35f6c5 | 2008-11-25 17:23:48 -0800 | [diff] [blame] | 2595 | out_bydst: |
| 2596 | for (dir--; dir >= 0; dir--) { |
| 2597 | struct xfrm_policy_hash *htab; |
| 2598 | |
| 2599 | htab = &net->xfrm.policy_bydst[dir]; |
| 2600 | xfrm_hash_free(htab->table, sz); |
| 2601 | } |
| 2602 | xfrm_hash_free(net->xfrm.policy_byidx, sz); |
Alexey Dobriyan | 93b851c | 2008-11-25 17:22:35 -0800 | [diff] [blame] | 2603 | out_byidx: |
| 2604 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | } |
| 2606 | |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2607 | static void xfrm_policy_fini(struct net *net) |
| 2608 | { |
Alexey Dobriyan | 7c2776e | 2008-11-25 17:57:44 -0800 | [diff] [blame] | 2609 | struct xfrm_audit audit_info; |
Alexey Dobriyan | 93b851c | 2008-11-25 17:22:35 -0800 | [diff] [blame] | 2610 | unsigned int sz; |
Alexey Dobriyan | 8b18f8e | 2008-11-25 17:23:26 -0800 | [diff] [blame] | 2611 | int dir; |
Alexey Dobriyan | 93b851c | 2008-11-25 17:22:35 -0800 | [diff] [blame] | 2612 | |
Alexey Dobriyan | 7c2776e | 2008-11-25 17:57:44 -0800 | [diff] [blame] | 2613 | flush_work(&net->xfrm.policy_hash_work); |
| 2614 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 2615 | audit_info.loginuid = -1; |
| 2616 | audit_info.sessionid = -1; |
| 2617 | audit_info.secid = 0; |
| 2618 | xfrm_policy_flush(net, XFRM_POLICY_TYPE_SUB, &audit_info); |
| 2619 | #endif |
| 2620 | audit_info.loginuid = -1; |
| 2621 | audit_info.sessionid = -1; |
| 2622 | audit_info.secid = 0; |
| 2623 | xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info); |
Alexey Dobriyan | 7c2776e | 2008-11-25 17:57:44 -0800 | [diff] [blame] | 2624 | |
Alexey Dobriyan | adfcf0b | 2008-11-25 17:22:11 -0800 | [diff] [blame] | 2625 | WARN_ON(!list_empty(&net->xfrm.policy_all)); |
Alexey Dobriyan | 93b851c | 2008-11-25 17:22:35 -0800 | [diff] [blame] | 2626 | |
Alexey Dobriyan | 8b18f8e | 2008-11-25 17:23:26 -0800 | [diff] [blame] | 2627 | for (dir = 0; dir < XFRM_POLICY_MAX * 2; dir++) { |
Alexey Dobriyan | a35f6c5 | 2008-11-25 17:23:48 -0800 | [diff] [blame] | 2628 | struct xfrm_policy_hash *htab; |
| 2629 | |
Alexey Dobriyan | 8b18f8e | 2008-11-25 17:23:26 -0800 | [diff] [blame] | 2630 | WARN_ON(!hlist_empty(&net->xfrm.policy_inexact[dir])); |
Alexey Dobriyan | a35f6c5 | 2008-11-25 17:23:48 -0800 | [diff] [blame] | 2631 | |
| 2632 | htab = &net->xfrm.policy_bydst[dir]; |
| 2633 | sz = (htab->hmask + 1); |
| 2634 | WARN_ON(!hlist_empty(htab->table)); |
| 2635 | xfrm_hash_free(htab->table, sz); |
Alexey Dobriyan | 8b18f8e | 2008-11-25 17:23:26 -0800 | [diff] [blame] | 2636 | } |
| 2637 | |
Alexey Dobriyan | 8100bea | 2008-11-25 17:22:58 -0800 | [diff] [blame] | 2638 | sz = (net->xfrm.policy_idx_hmask + 1) * sizeof(struct hlist_head); |
Alexey Dobriyan | 93b851c | 2008-11-25 17:22:35 -0800 | [diff] [blame] | 2639 | WARN_ON(!hlist_empty(net->xfrm.policy_byidx)); |
| 2640 | xfrm_hash_free(net->xfrm.policy_byidx, sz); |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2641 | } |
| 2642 | |
| 2643 | static int __net_init xfrm_net_init(struct net *net) |
| 2644 | { |
| 2645 | int rv; |
| 2646 | |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2647 | rv = xfrm_statistics_init(net); |
| 2648 | if (rv < 0) |
| 2649 | goto out_statistics; |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2650 | rv = xfrm_state_init(net); |
| 2651 | if (rv < 0) |
| 2652 | goto out_state; |
| 2653 | rv = xfrm_policy_init(net); |
| 2654 | if (rv < 0) |
| 2655 | goto out_policy; |
Alexey Dobriyan | d7c7544 | 2010-01-24 22:47:53 -0800 | [diff] [blame] | 2656 | xfrm_dst_ops_init(net); |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 2657 | rv = xfrm_sysctl_init(net); |
| 2658 | if (rv < 0) |
| 2659 | goto out_sysctl; |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2660 | return 0; |
| 2661 | |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 2662 | out_sysctl: |
| 2663 | xfrm_policy_fini(net); |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2664 | out_policy: |
| 2665 | xfrm_state_fini(net); |
| 2666 | out_state: |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2667 | xfrm_statistics_fini(net); |
| 2668 | out_statistics: |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2669 | return rv; |
| 2670 | } |
| 2671 | |
| 2672 | static void __net_exit xfrm_net_exit(struct net *net) |
| 2673 | { |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 2674 | xfrm_sysctl_fini(net); |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2675 | xfrm_policy_fini(net); |
| 2676 | xfrm_state_fini(net); |
Alexey Dobriyan | 59c9940 | 2008-11-25 17:59:52 -0800 | [diff] [blame] | 2677 | xfrm_statistics_fini(net); |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2678 | } |
| 2679 | |
| 2680 | static struct pernet_operations __net_initdata xfrm_net_ops = { |
| 2681 | .init = xfrm_net_init, |
| 2682 | .exit = xfrm_net_exit, |
| 2683 | }; |
| 2684 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2685 | void __init xfrm_init(void) |
| 2686 | { |
Alexey Dobriyan | d62ddc2 | 2008-11-25 17:14:31 -0800 | [diff] [blame] | 2687 | register_pernet_subsys(&xfrm_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2688 | xfrm_input_init(); |
| 2689 | } |
| 2690 | |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2691 | #ifdef CONFIG_AUDITSYSCALL |
Ilpo Järvinen | 1486cbd7 | 2008-01-12 03:20:03 -0800 | [diff] [blame] | 2692 | static void xfrm_audit_common_policyinfo(struct xfrm_policy *xp, |
| 2693 | struct audit_buffer *audit_buf) |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2694 | { |
Paul Moore | 875179f | 2007-12-01 23:27:18 +1100 | [diff] [blame] | 2695 | struct xfrm_sec_ctx *ctx = xp->security; |
| 2696 | struct xfrm_selector *sel = &xp->selector; |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2697 | |
Paul Moore | 875179f | 2007-12-01 23:27:18 +1100 | [diff] [blame] | 2698 | if (ctx) |
| 2699 | audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
| 2700 | ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
| 2701 | |
| 2702 | switch(sel->family) { |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2703 | case AF_INET: |
Harvey Harrison | 21454aa | 2008-10-31 00:54:56 -0700 | [diff] [blame] | 2704 | audit_log_format(audit_buf, " src=%pI4", &sel->saddr.a4); |
Paul Moore | 875179f | 2007-12-01 23:27:18 +1100 | [diff] [blame] | 2705 | if (sel->prefixlen_s != 32) |
| 2706 | audit_log_format(audit_buf, " src_prefixlen=%d", |
| 2707 | sel->prefixlen_s); |
Harvey Harrison | 21454aa | 2008-10-31 00:54:56 -0700 | [diff] [blame] | 2708 | audit_log_format(audit_buf, " dst=%pI4", &sel->daddr.a4); |
Paul Moore | 875179f | 2007-12-01 23:27:18 +1100 | [diff] [blame] | 2709 | if (sel->prefixlen_d != 32) |
| 2710 | audit_log_format(audit_buf, " dst_prefixlen=%d", |
| 2711 | sel->prefixlen_d); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2712 | break; |
| 2713 | case AF_INET6: |
Harvey Harrison | 5b095d989 | 2008-10-29 12:52:50 -0700 | [diff] [blame] | 2714 | audit_log_format(audit_buf, " src=%pI6", sel->saddr.a6); |
Paul Moore | 875179f | 2007-12-01 23:27:18 +1100 | [diff] [blame] | 2715 | if (sel->prefixlen_s != 128) |
| 2716 | audit_log_format(audit_buf, " src_prefixlen=%d", |
| 2717 | sel->prefixlen_s); |
Harvey Harrison | 5b095d989 | 2008-10-29 12:52:50 -0700 | [diff] [blame] | 2718 | audit_log_format(audit_buf, " dst=%pI6", sel->daddr.a6); |
Paul Moore | 875179f | 2007-12-01 23:27:18 +1100 | [diff] [blame] | 2719 | if (sel->prefixlen_d != 128) |
| 2720 | audit_log_format(audit_buf, " dst_prefixlen=%d", |
| 2721 | sel->prefixlen_d); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2722 | break; |
| 2723 | } |
| 2724 | } |
| 2725 | |
Paul Moore | 68277ac | 2007-12-20 20:49:33 -0800 | [diff] [blame] | 2726 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 2727 | uid_t auid, u32 sessionid, u32 secid) |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2728 | { |
| 2729 | struct audit_buffer *audit_buf; |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2730 | |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 2731 | audit_buf = xfrm_audit_start("SPD-add"); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2732 | if (audit_buf == NULL) |
| 2733 | return; |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 2734 | xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 2735 | audit_log_format(audit_buf, " res=%u", result); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2736 | xfrm_audit_common_policyinfo(xp, audit_buf); |
| 2737 | audit_log_end(audit_buf); |
| 2738 | } |
| 2739 | EXPORT_SYMBOL_GPL(xfrm_audit_policy_add); |
| 2740 | |
Paul Moore | 68277ac | 2007-12-20 20:49:33 -0800 | [diff] [blame] | 2741 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 2742 | uid_t auid, u32 sessionid, u32 secid) |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2743 | { |
| 2744 | struct audit_buffer *audit_buf; |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2745 | |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 2746 | audit_buf = xfrm_audit_start("SPD-delete"); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2747 | if (audit_buf == NULL) |
| 2748 | return; |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 2749 | xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
Paul Moore | afeb14b | 2007-12-21 14:58:11 -0800 | [diff] [blame] | 2750 | audit_log_format(audit_buf, " res=%u", result); |
Joy Latten | ab5f5e8 | 2007-09-17 11:51:22 -0700 | [diff] [blame] | 2751 | xfrm_audit_common_policyinfo(xp, audit_buf); |
| 2752 | audit_log_end(audit_buf); |
| 2753 | } |
| 2754 | EXPORT_SYMBOL_GPL(xfrm_audit_policy_delete); |
| 2755 | #endif |
| 2756 | |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2757 | #ifdef CONFIG_XFRM_MIGRATE |
David S. Miller | b4b7c0b | 2011-02-24 00:35:06 -0500 | [diff] [blame] | 2758 | static int xfrm_migrate_selector_match(const struct xfrm_selector *sel_cmp, |
| 2759 | const struct xfrm_selector *sel_tgt) |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2760 | { |
| 2761 | if (sel_cmp->proto == IPSEC_ULPROTO_ANY) { |
| 2762 | if (sel_tgt->family == sel_cmp->family && |
| 2763 | xfrm_addr_cmp(&sel_tgt->daddr, &sel_cmp->daddr, |
YOSHIFUJI Hideaki | a716c11 | 2007-02-09 23:25:29 +0900 | [diff] [blame] | 2764 | sel_cmp->family) == 0 && |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2765 | xfrm_addr_cmp(&sel_tgt->saddr, &sel_cmp->saddr, |
| 2766 | sel_cmp->family) == 0 && |
| 2767 | sel_tgt->prefixlen_d == sel_cmp->prefixlen_d && |
| 2768 | sel_tgt->prefixlen_s == sel_cmp->prefixlen_s) { |
| 2769 | return 1; |
| 2770 | } |
| 2771 | } else { |
| 2772 | if (memcmp(sel_tgt, sel_cmp, sizeof(*sel_tgt)) == 0) { |
| 2773 | return 1; |
| 2774 | } |
| 2775 | } |
| 2776 | return 0; |
| 2777 | } |
| 2778 | |
David S. Miller | b4b7c0b | 2011-02-24 00:35:06 -0500 | [diff] [blame] | 2779 | static struct xfrm_policy * xfrm_migrate_policy_find(const struct xfrm_selector *sel, |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2780 | u8 dir, u8 type) |
| 2781 | { |
| 2782 | struct xfrm_policy *pol, *ret = NULL; |
| 2783 | struct hlist_node *entry; |
| 2784 | struct hlist_head *chain; |
| 2785 | u32 priority = ~0U; |
| 2786 | |
| 2787 | read_lock_bh(&xfrm_policy_lock); |
Alexey Dobriyan | 1121994 | 2008-11-25 17:33:06 -0800 | [diff] [blame] | 2788 | chain = policy_hash_direct(&init_net, &sel->daddr, &sel->saddr, sel->family, dir); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2789 | hlist_for_each_entry(pol, entry, chain, bydst) { |
| 2790 | if (xfrm_migrate_selector_match(sel, &pol->selector) && |
| 2791 | pol->type == type) { |
| 2792 | ret = pol; |
| 2793 | priority = ret->priority; |
| 2794 | break; |
| 2795 | } |
| 2796 | } |
Alexey Dobriyan | 8b18f8e | 2008-11-25 17:23:26 -0800 | [diff] [blame] | 2797 | chain = &init_net.xfrm.policy_inexact[dir]; |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2798 | hlist_for_each_entry(pol, entry, chain, bydst) { |
| 2799 | if (xfrm_migrate_selector_match(sel, &pol->selector) && |
| 2800 | pol->type == type && |
| 2801 | pol->priority < priority) { |
| 2802 | ret = pol; |
| 2803 | break; |
| 2804 | } |
| 2805 | } |
| 2806 | |
| 2807 | if (ret) |
| 2808 | xfrm_pol_hold(ret); |
| 2809 | |
| 2810 | read_unlock_bh(&xfrm_policy_lock); |
| 2811 | |
| 2812 | return ret; |
| 2813 | } |
| 2814 | |
David S. Miller | dd70175 | 2011-02-24 00:21:08 -0500 | [diff] [blame] | 2815 | static int migrate_tmpl_match(const struct xfrm_migrate *m, const struct xfrm_tmpl *t) |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2816 | { |
| 2817 | int match = 0; |
| 2818 | |
| 2819 | if (t->mode == m->mode && t->id.proto == m->proto && |
| 2820 | (m->reqid == 0 || t->reqid == m->reqid)) { |
| 2821 | switch (t->mode) { |
| 2822 | case XFRM_MODE_TUNNEL: |
| 2823 | case XFRM_MODE_BEET: |
| 2824 | if (xfrm_addr_cmp(&t->id.daddr, &m->old_daddr, |
| 2825 | m->old_family) == 0 && |
| 2826 | xfrm_addr_cmp(&t->saddr, &m->old_saddr, |
| 2827 | m->old_family) == 0) { |
| 2828 | match = 1; |
| 2829 | } |
| 2830 | break; |
| 2831 | case XFRM_MODE_TRANSPORT: |
| 2832 | /* in case of transport mode, template does not store |
| 2833 | any IP addresses, hence we just compare mode and |
| 2834 | protocol */ |
| 2835 | match = 1; |
| 2836 | break; |
| 2837 | default: |
| 2838 | break; |
| 2839 | } |
| 2840 | } |
| 2841 | return match; |
| 2842 | } |
| 2843 | |
| 2844 | /* update endpoint address(es) of template(s) */ |
| 2845 | static int xfrm_policy_migrate(struct xfrm_policy *pol, |
| 2846 | struct xfrm_migrate *m, int num_migrate) |
| 2847 | { |
| 2848 | struct xfrm_migrate *mp; |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2849 | int i, j, n = 0; |
| 2850 | |
| 2851 | write_lock_bh(&pol->lock); |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 2852 | if (unlikely(pol->walk.dead)) { |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2853 | /* target policy has been deleted */ |
| 2854 | write_unlock_bh(&pol->lock); |
| 2855 | return -ENOENT; |
| 2856 | } |
| 2857 | |
| 2858 | for (i = 0; i < pol->xfrm_nr; i++) { |
| 2859 | for (j = 0, mp = m; j < num_migrate; j++, mp++) { |
| 2860 | if (!migrate_tmpl_match(mp, &pol->xfrm_vec[i])) |
| 2861 | continue; |
| 2862 | n++; |
Herbert Xu | 1bfcb10 | 2007-10-17 21:31:50 -0700 | [diff] [blame] | 2863 | if (pol->xfrm_vec[i].mode != XFRM_MODE_TUNNEL && |
| 2864 | pol->xfrm_vec[i].mode != XFRM_MODE_BEET) |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2865 | continue; |
| 2866 | /* update endpoints */ |
| 2867 | memcpy(&pol->xfrm_vec[i].id.daddr, &mp->new_daddr, |
| 2868 | sizeof(pol->xfrm_vec[i].id.daddr)); |
| 2869 | memcpy(&pol->xfrm_vec[i].saddr, &mp->new_saddr, |
| 2870 | sizeof(pol->xfrm_vec[i].saddr)); |
| 2871 | pol->xfrm_vec[i].encap_family = mp->new_family; |
| 2872 | /* flush bundles */ |
Timo Teräs | 80c802f | 2010-04-07 00:30:05 +0000 | [diff] [blame] | 2873 | atomic_inc(&pol->genid); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2874 | } |
| 2875 | } |
| 2876 | |
| 2877 | write_unlock_bh(&pol->lock); |
| 2878 | |
| 2879 | if (!n) |
| 2880 | return -ENODATA; |
| 2881 | |
| 2882 | return 0; |
| 2883 | } |
| 2884 | |
David S. Miller | dd70175 | 2011-02-24 00:21:08 -0500 | [diff] [blame] | 2885 | static int xfrm_migrate_check(const struct xfrm_migrate *m, int num_migrate) |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2886 | { |
| 2887 | int i, j; |
| 2888 | |
| 2889 | if (num_migrate < 1 || num_migrate > XFRM_MAX_DEPTH) |
| 2890 | return -EINVAL; |
| 2891 | |
| 2892 | for (i = 0; i < num_migrate; i++) { |
| 2893 | if ((xfrm_addr_cmp(&m[i].old_daddr, &m[i].new_daddr, |
| 2894 | m[i].old_family) == 0) && |
| 2895 | (xfrm_addr_cmp(&m[i].old_saddr, &m[i].new_saddr, |
| 2896 | m[i].old_family) == 0)) |
| 2897 | return -EINVAL; |
| 2898 | if (xfrm_addr_any(&m[i].new_daddr, m[i].new_family) || |
| 2899 | xfrm_addr_any(&m[i].new_saddr, m[i].new_family)) |
| 2900 | return -EINVAL; |
| 2901 | |
| 2902 | /* check if there is any duplicated entry */ |
| 2903 | for (j = i + 1; j < num_migrate; j++) { |
| 2904 | if (!memcmp(&m[i].old_daddr, &m[j].old_daddr, |
| 2905 | sizeof(m[i].old_daddr)) && |
| 2906 | !memcmp(&m[i].old_saddr, &m[j].old_saddr, |
| 2907 | sizeof(m[i].old_saddr)) && |
| 2908 | m[i].proto == m[j].proto && |
| 2909 | m[i].mode == m[j].mode && |
| 2910 | m[i].reqid == m[j].reqid && |
| 2911 | m[i].old_family == m[j].old_family) |
| 2912 | return -EINVAL; |
| 2913 | } |
| 2914 | } |
| 2915 | |
| 2916 | return 0; |
| 2917 | } |
| 2918 | |
David S. Miller | b4b7c0b | 2011-02-24 00:35:06 -0500 | [diff] [blame] | 2919 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2920 | struct xfrm_migrate *m, int num_migrate, |
| 2921 | struct xfrm_kmaddress *k) |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2922 | { |
| 2923 | int i, err, nx_cur = 0, nx_new = 0; |
| 2924 | struct xfrm_policy *pol = NULL; |
| 2925 | struct xfrm_state *x, *xc; |
| 2926 | struct xfrm_state *x_cur[XFRM_MAX_DEPTH]; |
| 2927 | struct xfrm_state *x_new[XFRM_MAX_DEPTH]; |
| 2928 | struct xfrm_migrate *mp; |
| 2929 | |
| 2930 | if ((err = xfrm_migrate_check(m, num_migrate)) < 0) |
| 2931 | goto out; |
| 2932 | |
| 2933 | /* Stage 1 - find policy */ |
| 2934 | if ((pol = xfrm_migrate_policy_find(sel, dir, type)) == NULL) { |
| 2935 | err = -ENOENT; |
| 2936 | goto out; |
| 2937 | } |
| 2938 | |
| 2939 | /* Stage 2 - find and update state(s) */ |
| 2940 | for (i = 0, mp = m; i < num_migrate; i++, mp++) { |
| 2941 | if ((x = xfrm_migrate_state_find(mp))) { |
| 2942 | x_cur[nx_cur] = x; |
| 2943 | nx_cur++; |
| 2944 | if ((xc = xfrm_state_migrate(x, mp))) { |
| 2945 | x_new[nx_new] = xc; |
| 2946 | nx_new++; |
| 2947 | } else { |
| 2948 | err = -ENODATA; |
| 2949 | goto restore_state; |
| 2950 | } |
| 2951 | } |
| 2952 | } |
| 2953 | |
| 2954 | /* Stage 3 - update policy */ |
| 2955 | if ((err = xfrm_policy_migrate(pol, m, num_migrate)) < 0) |
| 2956 | goto restore_state; |
| 2957 | |
| 2958 | /* Stage 4 - delete old state(s) */ |
| 2959 | if (nx_cur) { |
| 2960 | xfrm_states_put(x_cur, nx_cur); |
| 2961 | xfrm_states_delete(x_cur, nx_cur); |
| 2962 | } |
| 2963 | |
| 2964 | /* Stage 5 - announce */ |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2965 | km_migrate(sel, dir, type, m, num_migrate, k); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2966 | |
| 2967 | xfrm_pol_put(pol); |
| 2968 | |
| 2969 | return 0; |
| 2970 | out: |
| 2971 | return err; |
| 2972 | |
| 2973 | restore_state: |
| 2974 | if (pol) |
| 2975 | xfrm_pol_put(pol); |
| 2976 | if (nx_cur) |
| 2977 | xfrm_states_put(x_cur, nx_cur); |
| 2978 | if (nx_new) |
| 2979 | xfrm_states_delete(x_new, nx_new); |
| 2980 | |
| 2981 | return err; |
| 2982 | } |
David S. Miller | e610e67 | 2007-02-08 13:29:15 -0800 | [diff] [blame] | 2983 | EXPORT_SYMBOL(xfrm_migrate); |
Shinta Sugimoto | 80c9aba | 2007-02-08 13:11:42 -0800 | [diff] [blame] | 2984 | #endif |