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Message-ID: <20240807211331.1081038-8-chopps@chopps.org>
Date: Wed, 7 Aug 2024 17:13:21 -0400
From: Christian Hopps <chopps@...pps.org>
To: devel@...ux-ipsec.org
Cc: Steffen Klassert <steffen.klassert@...unet.com>,
netdev@...r.kernel.org,
Christian Hopps <chopps@...pps.org>,
Christian Hopps <chopps@...n.net>
Subject: [PATCH ipsec-next v9 07/17] xfrm: add generic iptfs defines and functionality
From: Christian Hopps <chopps@...n.net>
Define `XFRM_MODE_IPTFS` and `IPSEC_MODE_IPTFS` constants, and add these to
switch case and conditionals adjacent with the existing TUNNEL modes.
Signed-off-by: Christian Hopps <chopps@...n.net>
---
include/net/xfrm.h | 1 +
include/uapi/linux/ipsec.h | 3 ++-
include/uapi/linux/snmp.h | 2 ++
net/ipv4/esp4.c | 3 ++-
net/ipv6/esp6.c | 3 ++-
net/netfilter/nft_xfrm.c | 3 ++-
net/xfrm/xfrm_device.c | 1 +
net/xfrm/xfrm_output.c | 4 ++++
net/xfrm/xfrm_policy.c | 8 ++++++--
net/xfrm/xfrm_proc.c | 2 ++
net/xfrm/xfrm_state.c | 12 ++++++++++++
net/xfrm/xfrm_user.c | 12 ++++++++++++
12 files changed, 48 insertions(+), 6 deletions(-)
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 323e768ce4f3..f06e1d76e16a 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -37,6 +37,7 @@
#define XFRM_PROTO_COMP 108
#define XFRM_PROTO_IPIP 4
#define XFRM_PROTO_IPV6 41
+#define XFRM_PROTO_IPTFS IPPROTO_AGGFRAG
#define XFRM_PROTO_ROUTING IPPROTO_ROUTING
#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
diff --git a/include/uapi/linux/ipsec.h b/include/uapi/linux/ipsec.h
index 50d8ee1791e2..696b790f4346 100644
--- a/include/uapi/linux/ipsec.h
+++ b/include/uapi/linux/ipsec.h
@@ -14,7 +14,8 @@ enum {
IPSEC_MODE_ANY = 0, /* We do not support this for SA */
IPSEC_MODE_TRANSPORT = 1,
IPSEC_MODE_TUNNEL = 2,
- IPSEC_MODE_BEET = 3
+ IPSEC_MODE_BEET = 3,
+ IPSEC_MODE_IPTFS = 4
};
enum {
diff --git a/include/uapi/linux/snmp.h b/include/uapi/linux/snmp.h
index adf5fd78dd50..5a2553511190 100644
--- a/include/uapi/linux/snmp.h
+++ b/include/uapi/linux/snmp.h
@@ -339,6 +339,8 @@ enum
LINUX_MIB_XFRMACQUIREERROR, /* XfrmAcquireError */
LINUX_MIB_XFRMOUTSTATEDIRERROR, /* XfrmOutStateDirError */
LINUX_MIB_XFRMINSTATEDIRERROR, /* XfrmInStateDirError */
+ LINUX_MIB_XFRMINIPTFSERROR, /* XfrmInIptfsError */
+ LINUX_MIB_XFRMOUTNOQSPACE, /* XfrmOutNoQueueSpace */
__LINUX_MIB_XFRMMAX
};
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 47378ca41904..9a0165e3ceba 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -815,7 +815,8 @@ int esp_input_done2(struct sk_buff *skb, int err)
}
skb_pull_rcsum(skb, hlen);
- if (x->props.mode == XFRM_MODE_TUNNEL)
+ if (x->props.mode == XFRM_MODE_TUNNEL ||
+ x->props.mode == XFRM_MODE_IPTFS)
skb_reset_transport_header(skb);
else
skb_set_transport_header(skb, -ihl);
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 3920e8aa1031..5f85435de722 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -858,7 +858,8 @@ int esp6_input_done2(struct sk_buff *skb, int err)
skb_postpull_rcsum(skb, skb_network_header(skb),
skb_network_header_len(skb));
skb_pull_rcsum(skb, hlen);
- if (x->props.mode == XFRM_MODE_TUNNEL)
+ if (x->props.mode == XFRM_MODE_TUNNEL ||
+ x->props.mode == XFRM_MODE_IPTFS)
skb_reset_transport_header(skb);
else
skb_set_transport_header(skb, -hdr_len);
diff --git a/net/netfilter/nft_xfrm.c b/net/netfilter/nft_xfrm.c
index 1c866757db55..620238c6ef4c 100644
--- a/net/netfilter/nft_xfrm.c
+++ b/net/netfilter/nft_xfrm.c
@@ -112,7 +112,8 @@ static bool xfrm_state_addr_ok(enum nft_xfrm_keys k, u8 family, u8 mode)
return true;
}
- return mode == XFRM_MODE_BEET || mode == XFRM_MODE_TUNNEL;
+ return mode == XFRM_MODE_BEET || mode == XFRM_MODE_TUNNEL ||
+ mode == XFRM_MODE_IPTFS;
}
static void nft_xfrm_state_get_key(const struct nft_xfrm *priv,
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index e412e4afb169..d4905796e9ab 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -69,6 +69,7 @@ static void __xfrm_mode_beet_prep(struct xfrm_state *x, struct sk_buff *skb,
static void xfrm_outer_mode_prep(struct xfrm_state *x, struct sk_buff *skb)
{
switch (x->outer_mode.encap) {
+ case XFRM_MODE_IPTFS:
case XFRM_MODE_TUNNEL:
if (x->outer_mode.family == AF_INET)
return __xfrm_mode_tunnel_prep(x, skb,
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index ef81359e4038..b5025cf6136e 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -677,6 +677,10 @@ static void xfrm_get_inner_ipproto(struct sk_buff *skb, struct xfrm_state *x)
return;
}
+ if (x->outer_mode.encap == XFRM_MODE_IPTFS) {
+ xo->inner_ipproto = IPPROTO_AGGFRAG;
+ return;
+ }
/* non-Tunnel Mode */
if (!skb->encapsulation)
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index f764b1409175..928c3ed79d21 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2473,6 +2473,7 @@ xfrm_tmpl_resolve_one(struct xfrm_policy *policy, const struct flowi *fl,
struct xfrm_tmpl *tmpl = &policy->xfrm_vec[i];
if (tmpl->mode == XFRM_MODE_TUNNEL ||
+ tmpl->mode == XFRM_MODE_IPTFS ||
tmpl->mode == XFRM_MODE_BEET) {
remote = &tmpl->id.daddr;
local = &tmpl->saddr;
@@ -3264,7 +3265,8 @@ struct dst_entry *xfrm_lookup_with_ifid(struct net *net,
ok:
xfrm_pols_put(pols, drop_pols);
if (dst && dst->xfrm &&
- dst->xfrm->props.mode == XFRM_MODE_TUNNEL)
+ (dst->xfrm->props.mode == XFRM_MODE_TUNNEL ||
+ dst->xfrm->props.mode == XFRM_MODE_IPTFS))
dst->flags |= DST_XFRM_TUNNEL;
return dst;
@@ -4509,6 +4511,7 @@ static int migrate_tmpl_match(const struct xfrm_migrate *m, const struct xfrm_tm
switch (t->mode) {
case XFRM_MODE_TUNNEL:
case XFRM_MODE_BEET:
+ case XFRM_MODE_IPTFS:
if (xfrm_addr_equal(&t->id.daddr, &m->old_daddr,
m->old_family) &&
xfrm_addr_equal(&t->saddr, &m->old_saddr,
@@ -4551,7 +4554,8 @@ static int xfrm_policy_migrate(struct xfrm_policy *pol,
continue;
n++;
if (pol->xfrm_vec[i].mode != XFRM_MODE_TUNNEL &&
- pol->xfrm_vec[i].mode != XFRM_MODE_BEET)
+ pol->xfrm_vec[i].mode != XFRM_MODE_BEET &&
+ pol->xfrm_vec[i].mode != XFRM_MODE_IPTFS)
continue;
/* update endpoints */
memcpy(&pol->xfrm_vec[i].id.daddr, &mp->new_daddr,
diff --git a/net/xfrm/xfrm_proc.c b/net/xfrm/xfrm_proc.c
index eeb984be03a7..8e07dd614b0b 100644
--- a/net/xfrm/xfrm_proc.c
+++ b/net/xfrm/xfrm_proc.c
@@ -43,6 +43,8 @@ static const struct snmp_mib xfrm_mib_list[] = {
SNMP_MIB_ITEM("XfrmAcquireError", LINUX_MIB_XFRMACQUIREERROR),
SNMP_MIB_ITEM("XfrmOutStateDirError", LINUX_MIB_XFRMOUTSTATEDIRERROR),
SNMP_MIB_ITEM("XfrmInStateDirError", LINUX_MIB_XFRMINSTATEDIRERROR),
+ SNMP_MIB_ITEM("XfrmInIptfsError", LINUX_MIB_XFRMINIPTFSERROR),
+ SNMP_MIB_ITEM("XfrmOutNoQueueSpace", LINUX_MIB_XFRMOUTNOQSPACE),
SNMP_MIB_SENTINEL
};
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index e7b656bb6c0d..1d4b884f82d0 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -467,6 +467,11 @@ static const struct xfrm_mode xfrm4_mode_map[XFRM_MODE_MAX] = {
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET,
},
+ [XFRM_MODE_IPTFS] = {
+ .encap = XFRM_MODE_IPTFS,
+ .flags = XFRM_MODE_FLAG_TUNNEL,
+ .family = AF_INET,
+ },
};
static const struct xfrm_mode xfrm6_mode_map[XFRM_MODE_MAX] = {
@@ -488,6 +493,11 @@ static const struct xfrm_mode xfrm6_mode_map[XFRM_MODE_MAX] = {
.flags = XFRM_MODE_FLAG_TUNNEL,
.family = AF_INET6,
},
+ [XFRM_MODE_IPTFS] = {
+ .encap = XFRM_MODE_IPTFS,
+ .flags = XFRM_MODE_FLAG_TUNNEL,
+ .family = AF_INET6,
+ },
};
static const struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
@@ -2194,6 +2204,7 @@ static int __xfrm6_state_sort_cmp(const void *p)
#endif
case XFRM_MODE_TUNNEL:
case XFRM_MODE_BEET:
+ case XFRM_MODE_IPTFS:
return 4;
}
return 5;
@@ -2220,6 +2231,7 @@ static int __xfrm6_tmpl_sort_cmp(const void *p)
#endif
case XFRM_MODE_TUNNEL:
case XFRM_MODE_BEET:
+ case XFRM_MODE_IPTFS:
return 3;
}
return 4;
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 419bbeea6b20..40c79bd14a7e 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -379,6 +379,16 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
case XFRM_MODE_ROUTEOPTIMIZATION:
case XFRM_MODE_BEET:
break;
+ case XFRM_MODE_IPTFS:
+ if (p->id.proto != IPPROTO_ESP) {
+ NL_SET_ERR_MSG(extack, "IP-TFS mode only supported with ESP");
+ goto out;
+ }
+ if (sa_dir == 0) {
+ NL_SET_ERR_MSG(extack, "IP-TFS mode requires in or out direction attribute");
+ goto out;
+ }
+ break;
default:
NL_SET_ERR_MSG(extack, "Unsupported mode");
@@ -1984,6 +1994,8 @@ static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family,
return -EINVAL;
}
break;
+ case XFRM_MODE_IPTFS:
+ break;
default:
if (ut[i].family != prev_family) {
NL_SET_ERR_MSG(extack, "Mode in template doesn't support a family change");
--
2.46.0
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