1 files changed, 3 insertions, 34 deletions

diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 239d4a65ad6e..a3b403ba8f8f 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -1,19 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (C)2002 USAGI/WIDE Project
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- *
  * Authors
  *
  *	Mitsuru KANDA @USAGI       : IPv6 Support
@@ -53,8 +41,6 @@ struct esp_skb_cb {
 
 #define ESP_SKB_CB(__skb) ((struct esp_skb_cb *)&((__skb)->cb[0]))
 
-static u32 esp6_get_mtu(struct xfrm_state *x, int mtu);
-
 /*
  * Allocate an AEAD request structure with extra space for SG and IV.
  *
@@ -459,7 +445,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
 		struct xfrm_dst *dst = (struct xfrm_dst *)skb_dst(skb);
 		u32 padto;
 
-		padto = min(x->tfcpad, esp6_get_mtu(x, dst->child_mtu_cached));
+		padto = min(x->tfcpad, xfrm_state_mtu(x, dst->child_mtu_cached));
 		if (skb->len < padto)
 			esp.tfclen = padto - skb->len;
 	}
@@ -699,21 +685,6 @@ out:
 	return ret;
 }
 
-static u32 esp6_get_mtu(struct xfrm_state *x, int mtu)
-{
-	struct crypto_aead *aead = x->data;
-	u32 blksize = ALIGN(crypto_aead_blocksize(aead), 4);
-	unsigned int net_adj;
-
-	if (x->props.mode != XFRM_MODE_TUNNEL)
-		net_adj = sizeof(struct ipv6hdr);
-	else
-		net_adj = 0;
-
-	return ((mtu - x->props.header_len - crypto_aead_authsize(aead) -
-		 net_adj) & ~(blksize - 1)) + net_adj - 2;
-}
-
 static int esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		    u8 type, u8 code, int offset, __be32 info)
 {
@@ -931,7 +902,6 @@ static const struct xfrm_type esp6_type = {
 	.flags		= XFRM_TYPE_REPLAY_PROT,
 	.init_state	= esp6_init_state,
 	.destructor	= esp6_destroy,
-	.get_mtu	= esp6_get_mtu,
 	.input		= esp6_input,
 	.output		= esp6_output,
 	.hdr_offset	= xfrm6_find_1stfragopt,
@@ -963,8 +933,7 @@ static void __exit esp6_fini(void)
 {
 	if (xfrm6_protocol_deregister(&esp6_protocol, IPPROTO_ESP) < 0)
 		pr_info("%s: can't remove protocol\n", __func__);
-	if (xfrm_unregister_type(&esp6_type, AF_INET6) < 0)
-		pr_info("%s: can't remove xfrm type\n", __func__);
+	xfrm_unregister_type(&esp6_type, AF_INET6);
 }
 
 module_init(esp6_init);