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-rw-r--r--net/xfrm/xfrm_policy.c43
1 files changed, 0 insertions, 43 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index cbb0ba34a600..0db9e57013fd 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1192,46 +1192,6 @@ int xfrm_bundle_ok(struct xfrm_dst *first, struct flowi *fl, int family)
1192 1192
1193EXPORT_SYMBOL(xfrm_bundle_ok); 1193EXPORT_SYMBOL(xfrm_bundle_ok);
1194 1194
1195/* Well... that's _TASK_. We need to scan through transformation
1196 * list and figure out what mss tcp should generate in order to
1197 * final datagram fit to mtu. Mama mia... :-)
1198 *
1199 * Apparently, some easy way exists, but we used to choose the most
1200 * bizarre ones. :-) So, raising Kalashnikov... tra-ta-ta.
1201 *
1202 * Consider this function as something like dark humour. :-)
1203 */
1204static int xfrm_get_mss(struct dst_entry *dst, u32 mtu)
1205{
1206 int res = mtu - dst->header_len;
1207
1208 for (;;) {
1209 struct dst_entry *d = dst;
1210 int m = res;
1211
1212 do {
1213 struct xfrm_state *x = d->xfrm;
1214 if (x) {
1215 spin_lock_bh(&x->lock);
1216 if (x->km.state == XFRM_STATE_VALID &&
1217 x->type && x->type->get_max_size)
1218 m = x->type->get_max_size(d->xfrm, m);
1219 else
1220 m += x->props.header_len;
1221 spin_unlock_bh(&x->lock);
1222 }
1223 } while ((d = d->child) != NULL);
1224
1225 if (m <= mtu)
1226 break;
1227 res -= (m - mtu);
1228 if (res < 88)
1229 return mtu;
1230 }
1231
1232 return res + dst->header_len;
1233}
1234
1235int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo) 1195int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
1236{ 1196{
1237 int err = 0; 1197 int err = 0;
@@ -1252,8 +1212,6 @@ int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
1252 dst_ops->negative_advice = xfrm_negative_advice; 1212 dst_ops->negative_advice = xfrm_negative_advice;
1253 if (likely(dst_ops->link_failure == NULL)) 1213 if (likely(dst_ops->link_failure == NULL))
1254 dst_ops->link_failure = xfrm_link_failure; 1214 dst_ops->link_failure = xfrm_link_failure;
1255 if (likely(dst_ops->get_mss == NULL))
1256 dst_ops->get_mss = xfrm_get_mss;
1257 if (likely(afinfo->garbage_collect == NULL)) 1215 if (likely(afinfo->garbage_collect == NULL))
1258 afinfo->garbage_collect = __xfrm_garbage_collect; 1216 afinfo->garbage_collect = __xfrm_garbage_collect;
1259 xfrm_policy_afinfo[afinfo->family] = afinfo; 1217 xfrm_policy_afinfo[afinfo->family] = afinfo;
@@ -1281,7 +1239,6 @@ int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo)
1281 dst_ops->check = NULL; 1239 dst_ops->check = NULL;
1282 dst_ops->negative_advice = NULL; 1240 dst_ops->negative_advice = NULL;
1283 dst_ops->link_failure = NULL; 1241 dst_ops->link_failure = NULL;
1284 dst_ops->get_mss = NULL;
1285 afinfo->garbage_collect = NULL; 1242 afinfo->garbage_collect = NULL;
1286 } 1243 }
1287 } 1244 }