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linux/net/xfrm/xfrm_inout.h

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xfrm: remove input2 indirection from xfrm_mode No external dependencies on any module, place this in the core. Increase is about 1800 byte for xfrm_input.o. The beet helpers get added to internal header, as they can be reused from xfrm_output.c in the next patch (kernel contains several copies of them in the xfrm{4,6}_mode_beet.c files). Before: text data bss dec filename 5578 176 2364 8118 net/xfrm/xfrm_input.o 1180 64 0 1244 net/ipv4/xfrm4_mode_beet.o 171 40 0 211 net/ipv4/xfrm4_mode_transport.o 1163 40 0 1203 net/ipv4/xfrm4_mode_tunnel.o 1083 52 0 1135 net/ipv6/xfrm6_mode_beet.o 172 40 0 212 net/ipv6/xfrm6_mode_ro.o 172 40 0 212 net/ipv6/xfrm6_mode_transport.o 1056 40 0 1096 net/ipv6/xfrm6_mode_tunnel.o After: text data bss dec filename 7373 200 2364 9937 net/xfrm/xfrm_input.o 587 44 0 631 net/ipv4/xfrm4_mode_beet.o 171 32 0 203 net/ipv4/xfrm4_mode_transport.o 649 32 0 681 net/ipv4/xfrm4_mode_tunnel.o 625 44 0 669 net/ipv6/xfrm6_mode_beet.o 172 32 0 204 net/ipv6/xfrm6_mode_ro.o 172 32 0 204 net/ipv6/xfrm6_mode_transport.o 599 32 0 631 net/ipv6/xfrm6_mode_tunnel.o v2: pass inner_mode to xfrm_inner_mode_encap_remove to fix AF_UNSPEC selector breakage (bisected by Benedict Wong) Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2019-03-29 20:16:28 +00:00
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/ipv6.h>
#include <net/dsfield.h>
#include <net/xfrm.h>
#ifndef XFRM_INOUT_H
#define XFRM_INOUT_H 1
xfrm: move xfrm4_extract_header to common helper The function only initializes the XFRM CB in the skb. After previous patch xfrm4_extract_header is only called from net/xfrm/xfrm_{input,output}.c. Because of IPV6=m linker errors the ipv6 equivalent (xfrm6_extract_header) was already placed in xfrm_inout.h because we can't call functions residing in a module from the core. So do the same for the ipv4 helper and place it next to the ipv6 one. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-05-04 08:06:05 +00:00
static inline void xfrm4_extract_header(struct sk_buff *skb)
{
const struct iphdr *iph = ip_hdr(skb);
XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
XFRM_MODE_SKB_CB(skb)->id = iph->id;
XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
}
xfrm: state: remove extract_input indirection from xfrm_state_afinfo In order to keep CONFIG_IPV6=m working, xfrm6_extract_header needs to be duplicated. It will be removed again in a followup change when the remaining caller is moved to net/xfrm as well. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-05-04 08:06:04 +00:00
static inline void xfrm6_extract_header(struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_IPV6)
struct ipv6hdr *iph = ipv6_hdr(skb);
XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
XFRM_MODE_SKB_CB(skb)->id = 0;
XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
XFRM_MODE_SKB_CB(skb)->optlen = 0;
memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
#else
WARN_ON_ONCE(1);
#endif
}
xfrm: remove input2 indirection from xfrm_mode No external dependencies on any module, place this in the core. Increase is about 1800 byte for xfrm_input.o. The beet helpers get added to internal header, as they can be reused from xfrm_output.c in the next patch (kernel contains several copies of them in the xfrm{4,6}_mode_beet.c files). Before: text data bss dec filename 5578 176 2364 8118 net/xfrm/xfrm_input.o 1180 64 0 1244 net/ipv4/xfrm4_mode_beet.o 171 40 0 211 net/ipv4/xfrm4_mode_transport.o 1163 40 0 1203 net/ipv4/xfrm4_mode_tunnel.o 1083 52 0 1135 net/ipv6/xfrm6_mode_beet.o 172 40 0 212 net/ipv6/xfrm6_mode_ro.o 172 40 0 212 net/ipv6/xfrm6_mode_transport.o 1056 40 0 1096 net/ipv6/xfrm6_mode_tunnel.o After: text data bss dec filename 7373 200 2364 9937 net/xfrm/xfrm_input.o 587 44 0 631 net/ipv4/xfrm4_mode_beet.o 171 32 0 203 net/ipv4/xfrm4_mode_transport.o 649 32 0 681 net/ipv4/xfrm4_mode_tunnel.o 625 44 0 669 net/ipv6/xfrm6_mode_beet.o 172 32 0 204 net/ipv6/xfrm6_mode_ro.o 172 32 0 204 net/ipv6/xfrm6_mode_transport.o 599 32 0 631 net/ipv6/xfrm6_mode_tunnel.o v2: pass inner_mode to xfrm_inner_mode_encap_remove to fix AF_UNSPEC selector breakage (bisected by Benedict Wong) Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2019-03-29 20:16:28 +00:00
static inline void xfrm6_beet_make_header(struct sk_buff *skb)
{
struct ipv6hdr *iph = ipv6_hdr(skb);
iph->version = 6;
memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
sizeof(iph->flow_lbl));
iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
}
static inline void xfrm4_beet_make_header(struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
iph->ihl = 5;
iph->version = 4;
iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
iph->id = XFRM_MODE_SKB_CB(skb)->id;
iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off;
iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl;
}
#endif
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