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Merge tag 'ipsec-next-2023-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
Steffen Klassert says: ==================== ipsec-next 2023-04-19 1) Remove inner/outer modes from input/output path. These are not needed anymore. From Herbert Xu. * tag 'ipsec-next-2023-04-19' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next: xfrm: Remove inner/outer modes from output path xfrm: Remove inner/outer modes from input path ==================== Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jakub Kicinski <[email protected]>
2 parents 84ce730 + f479639 commit f1836a4

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+34
-65
lines changed

2 files changed

+34
-65
lines changed

‎net/xfrm/xfrm_input.c

Lines changed: 23 additions & 43 deletions
Original file line numberDiff line numberDiff line change
@@ -231,9 +231,6 @@ static int xfrm4_remove_tunnel_encap(struct xfrm_state *x, struct sk_buff *skb)
231231
{
232232
int err = -EINVAL;
233233

234-
if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPIP)
235-
goto out;
236-
237234
if (!pskb_may_pull(skb, sizeof(struct iphdr)))
238235
goto out;
239236

@@ -269,8 +266,6 @@ static int xfrm6_remove_tunnel_encap(struct xfrm_state *x, struct sk_buff *skb)
269266
{
270267
int err = -EINVAL;
271268

272-
if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPV6)
273-
goto out;
274269
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
275270
goto out;
276271

@@ -331,22 +326,26 @@ static int xfrm6_remove_beet_encap(struct xfrm_state *x, struct sk_buff *skb)
331326
*/
332327
static int
333328
xfrm_inner_mode_encap_remove(struct xfrm_state *x,
334-
const struct xfrm_mode *inner_mode,
335329
struct sk_buff *skb)
336330
{
337-
switch (inner_mode->encap) {
331+
switch (x->props.mode) {
338332
case XFRM_MODE_BEET:
339-
if (inner_mode->family == AF_INET)
333+
switch (XFRM_MODE_SKB_CB(skb)->protocol) {
334+
case IPPROTO_IPIP:
335+
case IPPROTO_BEETPH:
340336
return xfrm4_remove_beet_encap(x, skb);
341-
if (inner_mode->family == AF_INET6)
337+
case IPPROTO_IPV6:
342338
return xfrm6_remove_beet_encap(x, skb);
339+
}
343340
break;
344341
case XFRM_MODE_TUNNEL:
345-
if (inner_mode->family == AF_INET)
342+
switch (XFRM_MODE_SKB_CB(skb)->protocol) {
343+
case IPPROTO_IPIP:
346344
return xfrm4_remove_tunnel_encap(x, skb);
347-
if (inner_mode->family == AF_INET6)
345+
case IPPROTO_IPV6:
348346
return xfrm6_remove_tunnel_encap(x, skb);
349347
break;
348+
}
350349
}
351350

352351
WARN_ON_ONCE(1);
@@ -355,9 +354,7 @@ xfrm_inner_mode_encap_remove(struct xfrm_state *x,
355354

356355
static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
357356
{
358-
const struct xfrm_mode *inner_mode = &x->inner_mode;
359-
360-
switch (x->outer_mode.family) {
357+
switch (x->props.family) {
361358
case AF_INET:
362359
xfrm4_extract_header(skb);
363360
break;
@@ -369,25 +366,20 @@ static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
369366
return -EAFNOSUPPORT;
370367
}
371368

372-
if (x->sel.family == AF_UNSPEC) {
373-
inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
374-
if (!inner_mode)
375-
return -EAFNOSUPPORT;
376-
}
377-
378-
switch (inner_mode->family) {
379-
case AF_INET:
369+
switch (XFRM_MODE_SKB_CB(skb)->protocol) {
370+
case IPPROTO_IPIP:
371+
case IPPROTO_BEETPH:
380372
skb->protocol = htons(ETH_P_IP);
381373
break;
382-
case AF_INET6:
374+
case IPPROTO_IPV6:
383375
skb->protocol = htons(ETH_P_IPV6);
384376
break;
385377
default:
386378
WARN_ON_ONCE(1);
387379
break;
388380
}
389381

390-
return xfrm_inner_mode_encap_remove(x, inner_mode, skb);
382+
return xfrm_inner_mode_encap_remove(x, skb);
391383
}
392384

393385
/* Remove encapsulation header.
@@ -433,17 +425,16 @@ static int xfrm6_transport_input(struct xfrm_state *x, struct sk_buff *skb)
433425
}
434426

435427
static int xfrm_inner_mode_input(struct xfrm_state *x,
436-
const struct xfrm_mode *inner_mode,
437428
struct sk_buff *skb)
438429
{
439-
switch (inner_mode->encap) {
430+
switch (x->props.mode) {
440431
case XFRM_MODE_BEET:
441432
case XFRM_MODE_TUNNEL:
442433
return xfrm_prepare_input(x, skb);
443434
case XFRM_MODE_TRANSPORT:
444-
if (inner_mode->family == AF_INET)
435+
if (x->props.family == AF_INET)
445436
return xfrm4_transport_input(x, skb);
446-
if (inner_mode->family == AF_INET6)
437+
if (x->props.family == AF_INET6)
447438
return xfrm6_transport_input(x, skb);
448439
break;
449440
case XFRM_MODE_ROUTEOPTIMIZATION:
@@ -461,7 +452,6 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
461452
{
462453
const struct xfrm_state_afinfo *afinfo;
463454
struct net *net = dev_net(skb->dev);
464-
const struct xfrm_mode *inner_mode;
465455
int err;
466456
__be32 seq;
467457
__be32 seq_hi;
@@ -491,7 +481,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
491481
goto drop;
492482
}
493483

494-
family = x->outer_mode.family;
484+
family = x->props.family;
495485

496486
/* An encap_type of -1 indicates async resumption. */
497487
if (encap_type == -1) {
@@ -676,17 +666,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
676666

677667
XFRM_MODE_SKB_CB(skb)->protocol = nexthdr;
678668

679-
inner_mode = &x->inner_mode;
680-
681-
if (x->sel.family == AF_UNSPEC) {
682-
inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
683-
if (inner_mode == NULL) {
684-
XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMODEERROR);
685-
goto drop;
686-
}
687-
}
688-
689-
if (xfrm_inner_mode_input(x, inner_mode, skb)) {
669+
if (xfrm_inner_mode_input(x, skb)) {
690670
XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMODEERROR);
691671
goto drop;
692672
}
@@ -701,7 +681,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
701681
* transport mode so the outer address is identical.
702682
*/
703683
daddr = &x->id.daddr;
704-
family = x->outer_mode.family;
684+
family = x->props.family;
705685

706686
err = xfrm_parse_spi(skb, nexthdr, &spi, &seq);
707687
if (err < 0) {
@@ -732,7 +712,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
732712

733713
err = -EAFNOSUPPORT;
734714
rcu_read_lock();
735-
afinfo = xfrm_state_afinfo_get_rcu(x->inner_mode.family);
715+
afinfo = xfrm_state_afinfo_get_rcu(x->props.family);
736716
if (likely(afinfo))
737717
err = afinfo->transport_finish(skb, xfrm_gro || async);
738718
rcu_read_unlock();

‎net/xfrm/xfrm_output.c

Lines changed: 11 additions & 22 deletions
Original file line numberDiff line numberDiff line change
@@ -412,7 +412,7 @@ static int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
412412
IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
413413
skb->protocol = htons(ETH_P_IP);
414414

415-
switch (x->outer_mode.encap) {
415+
switch (x->props.mode) {
416416
case XFRM_MODE_BEET:
417417
return xfrm4_beet_encap_add(x, skb);
418418
case XFRM_MODE_TUNNEL:
@@ -435,7 +435,7 @@ static int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
435435
skb->ignore_df = 1;
436436
skb->protocol = htons(ETH_P_IPV6);
437437

438-
switch (x->outer_mode.encap) {
438+
switch (x->props.mode) {
439439
case XFRM_MODE_BEET:
440440
return xfrm6_beet_encap_add(x, skb);
441441
case XFRM_MODE_TUNNEL:
@@ -451,22 +451,22 @@ static int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
451451

452452
static int xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb)
453453
{
454-
switch (x->outer_mode.encap) {
454+
switch (x->props.mode) {
455455
case XFRM_MODE_BEET:
456456
case XFRM_MODE_TUNNEL:
457-
if (x->outer_mode.family == AF_INET)
457+
if (x->props.family == AF_INET)
458458
return xfrm4_prepare_output(x, skb);
459-
if (x->outer_mode.family == AF_INET6)
459+
if (x->props.family == AF_INET6)
460460
return xfrm6_prepare_output(x, skb);
461461
break;
462462
case XFRM_MODE_TRANSPORT:
463-
if (x->outer_mode.family == AF_INET)
463+
if (x->props.family == AF_INET)
464464
return xfrm4_transport_output(x, skb);
465-
if (x->outer_mode.family == AF_INET6)
465+
if (x->props.family == AF_INET6)
466466
return xfrm6_transport_output(x, skb);
467467
break;
468468
case XFRM_MODE_ROUTEOPTIMIZATION:
469-
if (x->outer_mode.family == AF_INET6)
469+
if (x->props.family == AF_INET6)
470470
return xfrm6_ro_output(x, skb);
471471
WARN_ON_ONCE(1);
472472
break;
@@ -875,21 +875,10 @@ static int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb)
875875

876876
static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb)
877877
{
878-
const struct xfrm_mode *inner_mode;
879-
880-
if (x->sel.family == AF_UNSPEC)
881-
inner_mode = xfrm_ip2inner_mode(x,
882-
xfrm_af2proto(skb_dst(skb)->ops->family));
883-
else
884-
inner_mode = &x->inner_mode;
885-
886-
if (inner_mode == NULL)
887-
return -EAFNOSUPPORT;
888-
889-
switch (inner_mode->family) {
890-
case AF_INET:
878+
switch (skb->protocol) {
879+
case htons(ETH_P_IP):
891880
return xfrm4_extract_output(x, skb);
892-
case AF_INET6:
881+
case htons(ETH_P_IPV6):
893882
return xfrm6_extract_output(x, skb);
894883
}
895884

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