ipv6: sr: add core files for SR HMAC support
This patch adds the necessary functions to compute and check the HMAC signature of an SR-enabled packet. Two HMAC algorithms are supported: hmac(sha1) and hmac(sha256). In order to avoid dynamic memory allocation for each HMAC computation, a per-cpu ring buffer is allocated for this purpose. A new per-interface sysctl called seg6_require_hmac is added, allowing a user-defined policy for processing HMAC-signed SR-enabled packets. A value of -1 means that the HMAC field will always be ignored. A value of 0 means that if an HMAC field is present, its validity will be enforced (the packet is dropped is the signature is incorrect). Finally, a value of 1 means that any SR-enabled packet that does not contain an HMAC signature or whose signature is incorrect will be dropped. Signed-off-by: David Lebrun <david.lebrun@uclouvain.be> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Lebrun
David S. Miller
parent
6c8702c60b
commit
bf355b8d2c
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@ -65,6 +65,9 @@ struct ipv6_devconf {
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__s32 use_oif_addrs_only;
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__s32 keep_addr_on_down;
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__s32 seg6_enabled;
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#ifdef CONFIG_IPV6_SEG6_HMAC
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__s32 seg6_require_hmac;
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#endif
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struct ctl_table_header *sysctl_header;
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};
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@ -0,0 +1,6 @@
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#ifndef _LINUX_SEG6_HMAC_H
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#define _LINUX_SEG6_HMAC_H
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#include <uapi/linux/seg6_hmac.h>
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#endif
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@ -18,6 +18,7 @@
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#include <linux/ipv6.h>
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#include <net/lwtunnel.h>
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#include <linux/seg6.h>
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#include <linux/rhashtable.h>
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static inline void update_csum_diff4(struct sk_buff *skb, __be32 from,
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__be32 to)
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@ -41,6 +42,9 @@ static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from,
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struct seg6_pernet_data {
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struct mutex lock;
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struct in6_addr __rcu *tun_src;
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#ifdef CONFIG_IPV6_SEG6_HMAC
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struct rhashtable hmac_infos;
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#endif
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};
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static inline struct seg6_pernet_data *seg6_pernet(struct net *net)
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@ -0,0 +1,62 @@
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/*
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* SR-IPv6 implementation
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*
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* Author:
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* David Lebrun <david.lebrun@uclouvain.be>
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _NET_SEG6_HMAC_H
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#define _NET_SEG6_HMAC_H
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#include <net/flow.h>
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#include <net/ip6_fib.h>
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#include <net/sock.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/route.h>
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#include <net/seg6.h>
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#include <linux/seg6_hmac.h>
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#include <linux/rhashtable.h>
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#define SEG6_HMAC_MAX_DIGESTSIZE 160
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#define SEG6_HMAC_RING_SIZE 256
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struct seg6_hmac_info {
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struct rhash_head node;
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struct rcu_head rcu;
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u32 hmackeyid;
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char secret[SEG6_HMAC_SECRET_LEN];
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u8 slen;
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u8 alg_id;
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};
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struct seg6_hmac_algo {
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u8 alg_id;
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char name[64];
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struct crypto_shash * __percpu *tfms;
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struct shash_desc * __percpu *shashs;
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};
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extern int seg6_hmac_compute(struct seg6_hmac_info *hinfo,
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struct ipv6_sr_hdr *hdr, struct in6_addr *saddr,
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u8 *output);
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extern struct seg6_hmac_info *seg6_hmac_info_lookup(struct net *net, u32 key);
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extern int seg6_hmac_info_add(struct net *net, u32 key,
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struct seg6_hmac_info *hinfo);
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extern int seg6_hmac_info_del(struct net *net, u32 key);
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extern int seg6_push_hmac(struct net *net, struct in6_addr *saddr,
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struct ipv6_sr_hdr *srh);
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extern bool seg6_hmac_validate_skb(struct sk_buff *skb);
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extern int seg6_hmac_init(void);
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extern void seg6_hmac_exit(void);
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extern int seg6_hmac_net_init(struct net *net);
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extern void seg6_hmac_net_exit(struct net *net);
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#endif
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@ -180,6 +180,7 @@ enum {
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DEVCONF_KEEP_ADDR_ON_DOWN,
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DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
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DEVCONF_SEG6_ENABLED,
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DEVCONF_SEG6_REQUIRE_HMAC,
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DEVCONF_MAX
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};
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@ -0,0 +1,21 @@
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#ifndef _UAPI_LINUX_SEG6_HMAC_H
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#define _UAPI_LINUX_SEG6_HMAC_H
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#include <linux/seg6.h>
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#define SEG6_HMAC_SECRET_LEN 64
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#define SEG6_HMAC_FIELD_LEN 32
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struct sr6_tlv_hmac {
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struct sr6_tlv tlvhdr;
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__u16 reserved;
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__be32 hmackeyid;
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__u8 hmac[SEG6_HMAC_FIELD_LEN];
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};
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enum {
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SEG6_HMAC_ALGO_SHA1 = 1,
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SEG6_HMAC_ALGO_SHA256 = 2,
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};
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#endif
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@ -301,4 +301,16 @@ config IPV6_SEG6_INLINE
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If unsure, say N.
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config IPV6_SEG6_HMAC
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bool "IPv6: Segment Routing HMAC support"
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depends on IPV6
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select CRYPTO_HMAC
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select CRYPTO_SHA1
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select CRYPTO_SHA256
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---help---
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Support for HMAC signature generation and verification
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of SR-enabled packets.
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If unsure, say N.
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endif # IPV6
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@ -44,6 +44,7 @@ obj-$(CONFIG_IPV6_SIT) += sit.o
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obj-$(CONFIG_IPV6_TUNNEL) += ip6_tunnel.o
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obj-$(CONFIG_IPV6_GRE) += ip6_gre.o
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obj-$(CONFIG_IPV6_FOU) += fou6.o
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obj-$(CONFIG_IPV6_SEG6_HMAC) += seg6_hmac.o
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obj-y += addrconf_core.o exthdrs_core.o ip6_checksum.o ip6_icmp.o
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obj-$(CONFIG_INET) += output_core.o protocol.o $(ipv6-offload)
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@ -239,6 +239,9 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = {
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.ignore_routes_with_linkdown = 0,
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.keep_addr_on_down = 0,
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.seg6_enabled = 0,
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#ifdef CONFIG_IPV6_SEG6_HMAC
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.seg6_require_hmac = 0,
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#endif
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};
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static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
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@ -286,6 +289,9 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
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.ignore_routes_with_linkdown = 0,
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.keep_addr_on_down = 0,
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.seg6_enabled = 0,
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#ifdef CONFIG_IPV6_SEG6_HMAC
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.seg6_require_hmac = 0,
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#endif
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};
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/* Check if a valid qdisc is available */
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@ -4947,6 +4953,9 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
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array[DEVCONF_DROP_UNSOLICITED_NA] = cnf->drop_unsolicited_na;
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array[DEVCONF_KEEP_ADDR_ON_DOWN] = cnf->keep_addr_on_down;
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array[DEVCONF_SEG6_ENABLED] = cnf->seg6_enabled;
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#ifdef CONFIG_IPV6_SEG6_HMAC
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array[DEVCONF_SEG6_REQUIRE_HMAC] = cnf->seg6_require_hmac;
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#endif
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}
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static inline size_t inet6_ifla6_size(void)
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@ -6045,6 +6054,15 @@ static const struct ctl_table addrconf_sysctl[] = {
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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#ifdef CONFIG_IPV6_SEG6_HMAC
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{
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.procname = "seg6_require_hmac",
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.data = &ipv6_devconf.seg6_require_hmac,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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#endif
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{
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/* sentinel */
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}
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@ -0,0 +1,484 @@
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/*
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* SR-IPv6 implementation -- HMAC functions
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*
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* Author:
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* David Lebrun <david.lebrun@uclouvain.be>
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <linux/net.h>
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#include <linux/netdevice.h>
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#include <linux/in6.h>
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#include <linux/icmpv6.h>
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#include <linux/mroute6.h>
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#include <linux/slab.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter_ipv6.h>
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#include <net/sock.h>
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#include <net/snmp.h>
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#include <net/ipv6.h>
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#include <net/protocol.h>
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#include <net/transp_v6.h>
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#include <net/rawv6.h>
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#include <net/ndisc.h>
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#include <net/ip6_route.h>
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#include <net/addrconf.h>
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#include <net/xfrm.h>
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#include <linux/cryptohash.h>
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#include <crypto/hash.h>
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#include <crypto/sha.h>
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#include <net/seg6.h>
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#include <net/genetlink.h>
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#include <net/seg6_hmac.h>
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#include <linux/random.h>
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static char * __percpu *hmac_ring;
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static int seg6_hmac_cmpfn(struct rhashtable_compare_arg *arg, const void *obj)
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{
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const struct seg6_hmac_info *hinfo = obj;
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return (hinfo->hmackeyid != *(__u32 *)arg->key);
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}
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static inline void seg6_hinfo_release(struct seg6_hmac_info *hinfo)
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{
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kfree_rcu(hinfo, rcu);
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}
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static void seg6_free_hi(void *ptr, void *arg)
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{
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struct seg6_hmac_info *hinfo = (struct seg6_hmac_info *)ptr;
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if (hinfo)
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seg6_hinfo_release(hinfo);
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}
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static const struct rhashtable_params rht_params = {
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.head_offset = offsetof(struct seg6_hmac_info, node),
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.key_offset = offsetof(struct seg6_hmac_info, hmackeyid),
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.key_len = sizeof(u32),
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.automatic_shrinking = true,
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.obj_cmpfn = seg6_hmac_cmpfn,
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};
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static struct seg6_hmac_algo hmac_algos[] = {
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{
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.alg_id = SEG6_HMAC_ALGO_SHA1,
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.name = "hmac(sha1)",
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},
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{
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.alg_id = SEG6_HMAC_ALGO_SHA256,
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.name = "hmac(sha256)",
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},
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};
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static struct sr6_tlv_hmac *seg6_get_tlv_hmac(struct ipv6_sr_hdr *srh)
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{
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struct sr6_tlv_hmac *tlv;
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if (srh->hdrlen < (srh->first_segment + 1) * 2 + 5)
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return NULL;
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if (!sr_has_hmac(srh))
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return NULL;
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tlv = (struct sr6_tlv_hmac *)
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((char *)srh + ((srh->hdrlen + 1) << 3) - 40);
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if (tlv->tlvhdr.type != SR6_TLV_HMAC || tlv->tlvhdr.len != 38)
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return NULL;
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return tlv;
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}
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static struct seg6_hmac_algo *__hmac_get_algo(u8 alg_id)
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{
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struct seg6_hmac_algo *algo;
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int i, alg_count;
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alg_count = sizeof(hmac_algos) / sizeof(struct seg6_hmac_algo);
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for (i = 0; i < alg_count; i++) {
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algo = &hmac_algos[i];
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if (algo->alg_id == alg_id)
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return algo;
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}
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return NULL;
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}
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static int __do_hmac(struct seg6_hmac_info *hinfo, const char *text, u8 psize,
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u8 *output, int outlen)
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{
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struct seg6_hmac_algo *algo;
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struct crypto_shash *tfm;
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struct shash_desc *shash;
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int ret, dgsize;
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algo = __hmac_get_algo(hinfo->alg_id);
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if (!algo)
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return -ENOENT;
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tfm = *this_cpu_ptr(algo->tfms);
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dgsize = crypto_shash_digestsize(tfm);
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if (dgsize > outlen) {
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pr_debug("sr-ipv6: __do_hmac: digest size too big (%d / %d)\n",
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dgsize, outlen);
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return -ENOMEM;
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}
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ret = crypto_shash_setkey(tfm, hinfo->secret, hinfo->slen);
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if (ret < 0) {
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pr_debug("sr-ipv6: crypto_shash_setkey failed: err %d\n", ret);
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goto failed;
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}
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shash = *this_cpu_ptr(algo->shashs);
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shash->tfm = tfm;
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ret = crypto_shash_digest(shash, text, psize, output);
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if (ret < 0) {
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pr_debug("sr-ipv6: crypto_shash_digest failed: err %d\n", ret);
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goto failed;
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}
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return dgsize;
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failed:
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return ret;
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}
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int seg6_hmac_compute(struct seg6_hmac_info *hinfo, struct ipv6_sr_hdr *hdr,
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struct in6_addr *saddr, u8 *output)
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{
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__be32 hmackeyid = cpu_to_be32(hinfo->hmackeyid);
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u8 tmp_out[SEG6_HMAC_MAX_DIGESTSIZE];
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int plen, i, dgsize, wrsize;
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char *ring, *off;
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/* a 160-byte buffer for digest output allows to store highest known
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* hash function (RadioGatun) with up to 1216 bits
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*/
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/* saddr(16) + first_seg(1) + cleanup(1) + keyid(4) + seglist(16n) */
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plen = 16 + 1 + 1 + 4 + (hdr->first_segment + 1) * 16;
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/* this limit allows for 14 segments */
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if (plen >= SEG6_HMAC_RING_SIZE)
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return -EMSGSIZE;
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/* Let's build the HMAC text on the ring buffer. The text is composed
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* as follows, in order:
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*
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* 1. Source IPv6 address (128 bits)
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* 2. first_segment value (8 bits)
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* 3. cleanup flag (8 bits: highest bit is cleanup value, others are 0)
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* 4. HMAC Key ID (32 bits)
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* 5. All segments in the segments list (n * 128 bits)
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*/
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local_bh_disable();
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ring = *this_cpu_ptr(hmac_ring);
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off = ring;
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/* source address */
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memcpy(off, saddr, 16);
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off += 16;
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/* first_segment value */
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*off++ = hdr->first_segment;
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/* cleanup flag */
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*off++ = !!(sr_has_cleanup(hdr)) << 7;
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/* HMAC Key ID */
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memcpy(off, &hmackeyid, 4);
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off += 4;
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/* all segments in the list */
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for (i = 0; i < hdr->first_segment + 1; i++) {
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memcpy(off, hdr->segments + i, 16);
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off += 16;
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}
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dgsize = __do_hmac(hinfo, ring, plen, tmp_out,
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SEG6_HMAC_MAX_DIGESTSIZE);
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local_bh_enable();
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if (dgsize < 0)
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return dgsize;
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wrsize = SEG6_HMAC_FIELD_LEN;
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if (wrsize > dgsize)
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wrsize = dgsize;
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memset(output, 0, SEG6_HMAC_FIELD_LEN);
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memcpy(output, tmp_out, wrsize);
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return 0;
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}
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EXPORT_SYMBOL(seg6_hmac_compute);
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/* checks if an incoming SR-enabled packet's HMAC status matches
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* the incoming policy.
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*
|
||||
* called with rcu_read_lock()
|
||||
*/
|
||||
bool seg6_hmac_validate_skb(struct sk_buff *skb)
|
||||
{
|
||||
u8 hmac_output[SEG6_HMAC_FIELD_LEN];
|
||||
struct net *net = dev_net(skb->dev);
|
||||
struct seg6_hmac_info *hinfo;
|
||||
struct sr6_tlv_hmac *tlv;
|
||||
struct ipv6_sr_hdr *srh;
|
||||
struct inet6_dev *idev;
|
||||
|
||||
idev = __in6_dev_get(skb->dev);
|
||||
|
||||
srh = (struct ipv6_sr_hdr *)skb_transport_header(skb);
|
||||
|
||||
tlv = seg6_get_tlv_hmac(srh);
|
||||
|
||||
/* mandatory check but no tlv */
|
||||
if (idev->cnf.seg6_require_hmac > 0 && !tlv)
|
||||
return false;
|
||||
|
||||
/* no check */
|
||||
if (idev->cnf.seg6_require_hmac < 0)
|
||||
return true;
|
||||
|
||||
/* check only if present */
|
||||
if (idev->cnf.seg6_require_hmac == 0 && !tlv)
|
||||
return true;
|
||||
|
||||
/* now, seg6_require_hmac >= 0 && tlv */
|
||||
|
||||
hinfo = seg6_hmac_info_lookup(net, be32_to_cpu(tlv->hmackeyid));
|
||||
if (!hinfo)
|
||||
return false;
|
||||
|
||||
if (seg6_hmac_compute(hinfo, srh, &ipv6_hdr(skb)->saddr, hmac_output))
|
||||
return false;
|
||||
|
||||
if (memcmp(hmac_output, tlv->hmac, SEG6_HMAC_FIELD_LEN) != 0)
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
EXPORT_SYMBOL(seg6_hmac_validate_skb);
|
||||
|
||||
/* called with rcu_read_lock() */
|
||||
struct seg6_hmac_info *seg6_hmac_info_lookup(struct net *net, u32 key)
|
||||
{
|
||||
struct seg6_pernet_data *sdata = seg6_pernet(net);
|
||||
struct seg6_hmac_info *hinfo;
|
||||
|
||||
hinfo = rhashtable_lookup_fast(&sdata->hmac_infos, &key, rht_params);
|
||||
|
||||
return hinfo;
|
||||
}
|
||||
EXPORT_SYMBOL(seg6_hmac_info_lookup);
|
||||
|
||||
int seg6_hmac_info_add(struct net *net, u32 key, struct seg6_hmac_info *hinfo)
|
||||
{
|
||||
struct seg6_pernet_data *sdata = seg6_pernet(net);
|
||||
int err;
|
||||
|
||||
err = rhashtable_lookup_insert_fast(&sdata->hmac_infos, &hinfo->node,
|
||||
rht_params);
|
||||
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(seg6_hmac_info_add);
|
||||
|
||||
int seg6_hmac_info_del(struct net *net, u32 key)
|
||||
{
|
||||
struct seg6_pernet_data *sdata = seg6_pernet(net);
|
||||
struct seg6_hmac_info *hinfo;
|
||||
int err = -ENOENT;
|
||||
|
||||
hinfo = rhashtable_lookup_fast(&sdata->hmac_infos, &key, rht_params);
|
||||
if (!hinfo)
|
||||
goto out;
|
||||
|
||||
err = rhashtable_remove_fast(&sdata->hmac_infos, &hinfo->node,
|
||||
rht_params);
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
seg6_hinfo_release(hinfo);
|
||||
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(seg6_hmac_info_del);
|
||||
|
||||
int seg6_push_hmac(struct net *net, struct in6_addr *saddr,
|
||||
struct ipv6_sr_hdr *srh)
|
||||
{
|
||||
struct seg6_hmac_info *hinfo;
|
||||
struct sr6_tlv_hmac *tlv;
|
||||
int err = -ENOENT;
|
||||
|
||||
tlv = seg6_get_tlv_hmac(srh);
|
||||
if (!tlv)
|
||||
return -EINVAL;
|
||||
|
||||
rcu_read_lock();
|
||||
|
||||
hinfo = seg6_hmac_info_lookup(net, be32_to_cpu(tlv->hmackeyid));
|
||||
if (!hinfo)
|
||||
goto out;
|
||||
|
||||
memset(tlv->hmac, 0, SEG6_HMAC_FIELD_LEN);
|
||||
err = seg6_hmac_compute(hinfo, srh, saddr, tlv->hmac);
|
||||
|
||||
out:
|
||||
rcu_read_unlock();
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(seg6_push_hmac);
|
||||
|
||||
static int seg6_hmac_init_ring(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
hmac_ring = alloc_percpu(char *);
|
||||
|
||||
if (!hmac_ring)
|
||||
return -ENOMEM;
|
||||
|
||||
for_each_possible_cpu(i) {
|
||||
char *ring = kzalloc(SEG6_HMAC_RING_SIZE, GFP_KERNEL);
|
||||
|
||||
if (!ring)
|
||||
return -ENOMEM;
|
||||
|
||||
*per_cpu_ptr(hmac_ring, i) = ring;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int seg6_hmac_init_algo(void)
|
||||
{
|
||||
struct seg6_hmac_algo *algo;
|
||||
struct crypto_shash *tfm;
|
||||
struct shash_desc *shash;
|
||||
int i, alg_count, cpu;
|
||||
|
||||
alg_count = sizeof(hmac_algos) / sizeof(struct seg6_hmac_algo);
|
||||
|
||||
for (i = 0; i < alg_count; i++) {
|
||||
struct crypto_shash **p_tfm;
|
||||
int shsize;
|
||||
|
||||
algo = &hmac_algos[i];
|
||||
algo->tfms = alloc_percpu(struct crypto_shash *);
|
||||
if (!algo->tfms)
|
||||
return -ENOMEM;
|
||||
|
||||
for_each_possible_cpu(cpu) {
|
||||
tfm = crypto_alloc_shash(algo->name, 0, GFP_KERNEL);
|
||||
if (IS_ERR(tfm))
|
||||
return PTR_ERR(tfm);
|
||||
p_tfm = per_cpu_ptr(algo->tfms, cpu);
|
||||
*p_tfm = tfm;
|
||||
}
|
||||
|
||||
p_tfm = this_cpu_ptr(algo->tfms);
|
||||
tfm = *p_tfm;
|
||||
|
||||
shsize = sizeof(*shash) + crypto_shash_descsize(tfm);
|
||||
|
||||
algo->shashs = alloc_percpu(struct shash_desc *);
|
||||
if (!algo->shashs)
|
||||
return -ENOMEM;
|
||||
|
||||
for_each_possible_cpu(cpu) {
|
||||
shash = kzalloc(shsize, GFP_KERNEL);
|
||||
if (!shash)
|
||||
return -ENOMEM;
|
||||
*per_cpu_ptr(algo->shashs, cpu) = shash;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int __init seg6_hmac_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = seg6_hmac_init_ring();
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
ret = seg6_hmac_init_algo();
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(seg6_hmac_init);
|
||||
|
||||
int __net_init seg6_hmac_net_init(struct net *net)
|
||||
{
|
||||
struct seg6_pernet_data *sdata = seg6_pernet(net);
|
||||
|
||||
rhashtable_init(&sdata->hmac_infos, &rht_params);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(seg6_hmac_net_init);
|
||||
|
||||
void seg6_hmac_exit(void)
|
||||
{
|
||||
struct seg6_hmac_algo *algo = NULL;
|
||||
int i, alg_count, cpu;
|
||||
|
||||
for_each_possible_cpu(i) {
|
||||
char *ring = *per_cpu_ptr(hmac_ring, i);
|
||||
|
||||
kfree(ring);
|
||||
}
|
||||
free_percpu(hmac_ring);
|
||||
|
||||
alg_count = sizeof(hmac_algos) / sizeof(struct seg6_hmac_algo);
|
||||
for (i = 0; i < alg_count; i++) {
|
||||
algo = &hmac_algos[i];
|
||||
for_each_possible_cpu(cpu) {
|
||||
struct crypto_shash *tfm;
|
||||
struct shash_desc *shash;
|
||||
|
||||
shash = *per_cpu_ptr(algo->shashs, cpu);
|
||||
kfree(shash);
|
||||
tfm = *per_cpu_ptr(algo->tfms, cpu);
|
||||
crypto_free_shash(tfm);
|
||||
}
|
||||
free_percpu(algo->tfms);
|
||||
free_percpu(algo->shashs);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(seg6_hmac_exit);
|
||||
|
||||
void __net_exit seg6_hmac_net_exit(struct net *net)
|
||||
{
|
||||
struct seg6_pernet_data *sdata = seg6_pernet(net);
|
||||
|
||||
rhashtable_free_and_destroy(&sdata->hmac_infos, seg6_free_hi, NULL);
|
||||
}
|
||||
EXPORT_SYMBOL(seg6_hmac_net_exit);
|
||||
Loading…
Reference in New Issue