Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <net/checksum.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <net/dst_cache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <net/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <net/ip6_fib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <net/ip6_route.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <net/lwtunnel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <net/protocol.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <uapi/linux/ila.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "ila.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) struct ila_lwt {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	struct ila_params p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	struct dst_cache dst_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	u32 connected : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	u32 lwt_output : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) static inline struct ila_lwt *ila_lwt_lwtunnel(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	struct lwtunnel_state *lwt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	return (struct ila_lwt *)lwt->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) static inline struct ila_params *ila_params_lwtunnel(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	struct lwtunnel_state *lwt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	return &ila_lwt_lwtunnel(lwt)->p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static int ila_output(struct net *net, struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct dst_entry *orig_dst = skb_dst(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	struct rt6_info *rt = (struct rt6_info *)orig_dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	struct ila_lwt *ilwt = ila_lwt_lwtunnel(orig_dst->lwtstate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	struct dst_entry *dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	int err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	if (skb->protocol != htons(ETH_P_IPV6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	if (ilwt->lwt_output)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		ila_update_ipv6_locator(skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 					ila_params_lwtunnel(orig_dst->lwtstate),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 					true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if (rt->rt6i_flags & (RTF_GATEWAY | RTF_CACHE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		/* Already have a next hop address in route, no need for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		 * dest cache route.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		return orig_dst->lwtstate->orig_output(net, sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	dst = dst_cache_get(&ilwt->dst_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	if (unlikely(!dst)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		struct ipv6hdr *ip6h = ipv6_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		struct flowi6 fl6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		/* Lookup a route for the new destination. Take into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		 * account that the base route may already have a gateway.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		memset(&fl6, 0, sizeof(fl6));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		fl6.flowi6_oif = orig_dst->dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		fl6.flowi6_iif = LOOPBACK_IFINDEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		fl6.daddr = *rt6_nexthop((struct rt6_info *)orig_dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 					 &ip6h->daddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		dst = ip6_route_output(net, NULL, &fl6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		if (dst->error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 			err = -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			dst_release(dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 			goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		if (IS_ERR(dst)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			err = PTR_ERR(dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		if (ilwt->connected)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			dst_cache_set_ip6(&ilwt->dst_cache, dst, &fl6.saddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	skb_dst_set(skb, dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	return dst_output(net, sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static int ila_input(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	struct dst_entry *dst = skb_dst(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct ila_lwt *ilwt = ila_lwt_lwtunnel(dst->lwtstate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	if (skb->protocol != htons(ETH_P_IPV6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	if (!ilwt->lwt_output)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		ila_update_ipv6_locator(skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 					ila_params_lwtunnel(dst->lwtstate),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 					false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	return dst->lwtstate->orig_input(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static const struct nla_policy ila_nl_policy[ILA_ATTR_MAX + 1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	[ILA_ATTR_LOCATOR] = { .type = NLA_U64, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	[ILA_ATTR_CSUM_MODE] = { .type = NLA_U8, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	[ILA_ATTR_IDENT_TYPE] = { .type = NLA_U8, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	[ILA_ATTR_HOOK_TYPE] = { .type = NLA_U8, },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static int ila_build_state(struct net *net, struct nlattr *nla,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			   unsigned int family, const void *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			   struct lwtunnel_state **ts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			   struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	struct ila_lwt *ilwt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	struct ila_params *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	struct nlattr *tb[ILA_ATTR_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	struct lwtunnel_state *newts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	const struct fib6_config *cfg6 = cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct ila_addr *iaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	u8 ident_type = ILA_ATYPE_USE_FORMAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	u8 hook_type = ILA_HOOK_ROUTE_OUTPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	u8 csum_mode = ILA_CSUM_NO_ACTION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	bool lwt_output = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	u8 eff_ident_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (family != AF_INET6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	ret = nla_parse_nested_deprecated(tb, ILA_ATTR_MAX, nla,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 					  ila_nl_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if (!tb[ILA_ATTR_LOCATOR])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	iaddr = (struct ila_addr *)&cfg6->fc_dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	if (tb[ILA_ATTR_IDENT_TYPE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		ident_type = nla_get_u8(tb[ILA_ATTR_IDENT_TYPE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	if (ident_type == ILA_ATYPE_USE_FORMAT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		/* Infer identifier type from type field in formatted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		 * identifier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		if (cfg6->fc_dst_len < 8 * sizeof(struct ila_locator) + 3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			/* Need to have full locator and at least type field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			 * included in destination
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		eff_ident_type = iaddr->ident.type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		eff_ident_type = ident_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	switch (eff_ident_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	case ILA_ATYPE_IID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		/* Don't allow ILA for IID type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	case ILA_ATYPE_LUID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	case ILA_ATYPE_VIRT_V4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	case ILA_ATYPE_VIRT_UNI_V6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	case ILA_ATYPE_VIRT_MULTI_V6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	case ILA_ATYPE_NONLOCAL_ADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		/* These ILA formats are not supported yet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (tb[ILA_ATTR_HOOK_TYPE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		hook_type = nla_get_u8(tb[ILA_ATTR_HOOK_TYPE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	switch (hook_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	case ILA_HOOK_ROUTE_OUTPUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		lwt_output = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	case ILA_HOOK_ROUTE_INPUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		lwt_output = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	if (tb[ILA_ATTR_CSUM_MODE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		csum_mode = nla_get_u8(tb[ILA_ATTR_CSUM_MODE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	if (csum_mode == ILA_CSUM_NEUTRAL_MAP &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	    ila_csum_neutral_set(iaddr->ident)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		/* Don't allow translation if checksum neutral bit is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		 * configured and it's set in the SIR address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	newts = lwtunnel_state_alloc(sizeof(*ilwt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	if (!newts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	ilwt = ila_lwt_lwtunnel(newts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	ret = dst_cache_init(&ilwt->dst_cache, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		kfree(newts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	ilwt->lwt_output = !!lwt_output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	p = ila_params_lwtunnel(newts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	p->csum_mode = csum_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	p->ident_type = ident_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	p->locator.v64 = (__force __be64)nla_get_u64(tb[ILA_ATTR_LOCATOR]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	/* Precompute checksum difference for translation since we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	 * know both the old locator and the new one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	p->locator_match = iaddr->loc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	ila_init_saved_csum(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	newts->type = LWTUNNEL_ENCAP_ILA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	newts->flags |= LWTUNNEL_STATE_OUTPUT_REDIRECT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 			LWTUNNEL_STATE_INPUT_REDIRECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (cfg6->fc_dst_len == 8 * sizeof(struct in6_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		ilwt->connected = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	*ts = newts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static void ila_destroy_state(struct lwtunnel_state *lwt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	dst_cache_destroy(&ila_lwt_lwtunnel(lwt)->dst_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) static int ila_fill_encap_info(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 			       struct lwtunnel_state *lwtstate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	struct ila_params *p = ila_params_lwtunnel(lwtstate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	struct ila_lwt *ilwt = ila_lwt_lwtunnel(lwtstate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	if (nla_put_u64_64bit(skb, ILA_ATTR_LOCATOR, (__force u64)p->locator.v64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 			      ILA_ATTR_PAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	if (nla_put_u8(skb, ILA_ATTR_CSUM_MODE, (__force u8)p->csum_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	if (nla_put_u8(skb, ILA_ATTR_IDENT_TYPE, (__force u8)p->ident_type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (nla_put_u8(skb, ILA_ATTR_HOOK_TYPE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		       ilwt->lwt_output ? ILA_HOOK_ROUTE_OUTPUT :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 					  ILA_HOOK_ROUTE_INPUT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) static int ila_encap_nlsize(struct lwtunnel_state *lwtstate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	return nla_total_size_64bit(sizeof(u64)) + /* ILA_ATTR_LOCATOR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	       nla_total_size(sizeof(u8)) +        /* ILA_ATTR_CSUM_MODE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	       nla_total_size(sizeof(u8)) +        /* ILA_ATTR_IDENT_TYPE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	       nla_total_size(sizeof(u8)) +        /* ILA_ATTR_HOOK_TYPE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	       0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static int ila_encap_cmp(struct lwtunnel_state *a, struct lwtunnel_state *b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	struct ila_params *a_p = ila_params_lwtunnel(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	struct ila_params *b_p = ila_params_lwtunnel(b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	return (a_p->locator.v64 != b_p->locator.v64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) static const struct lwtunnel_encap_ops ila_encap_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	.build_state = ila_build_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	.destroy_state = ila_destroy_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	.output = ila_output,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	.input = ila_input,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	.fill_encap = ila_fill_encap_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	.get_encap_size = ila_encap_nlsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	.cmp_encap = ila_encap_cmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	.owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) int ila_lwt_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	return lwtunnel_encap_add_ops(&ila_encap_ops, LWTUNNEL_ENCAP_ILA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) void ila_lwt_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	lwtunnel_encap_del_ops(&ila_encap_ops, LWTUNNEL_ENCAP_ILA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }