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Message-ID: <20240731235125.1063594-5-chopps@chopps.org>
Date: Wed, 31 Jul 2024 19:51:13 -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 v6 04/16] xfrm: netlink: add config (netlink) options
From: Christian Hopps <chopps@...n.net>
Add netlink options for configuring IP-TFS SAs.
Signed-off-by: Christian Hopps <chopps@...n.net>
---
include/uapi/linux/xfrm.h | 9 ++++++-
net/xfrm/xfrm_compat.c | 10 ++++++--
net/xfrm/xfrm_user.c | 52 +++++++++++++++++++++++++++++++++++++++
3 files changed, 68 insertions(+), 3 deletions(-)
diff --git a/include/uapi/linux/xfrm.h b/include/uapi/linux/xfrm.h
index f28701500714..042ebf94bb3d 100644
--- a/include/uapi/linux/xfrm.h
+++ b/include/uapi/linux/xfrm.h
@@ -158,7 +158,8 @@ enum {
#define XFRM_MODE_ROUTEOPTIMIZATION 2
#define XFRM_MODE_IN_TRIGGER 3
#define XFRM_MODE_BEET 4
-#define XFRM_MODE_MAX 5
+#define XFRM_MODE_IPTFS 5
+#define XFRM_MODE_MAX 6
/* Netlink configuration messages. */
enum {
@@ -322,6 +323,12 @@ enum xfrm_attr_type_t {
XFRMA_MTIMER_THRESH, /* __u32 in seconds for input SA */
XFRMA_SA_DIR, /* __u8 */
XFRMA_NAT_KEEPALIVE_INTERVAL, /* __u32 in seconds for NAT keepalive */
+ XFRMA_IPTFS_DROP_TIME, /* __u32 in: usec to wait for next seq */
+ XFRMA_IPTFS_REORDER_WINDOW, /* __u16 in: reorder window size (pkts) */
+ XFRMA_IPTFS_DONT_FRAG, /* out: don't use fragmentation */
+ XFRMA_IPTFS_INIT_DELAY, /* __u32 out: initial packet wait delay (usec) */
+ XFRMA_IPTFS_MAX_QSIZE, /* __u32 out: max ingress queue size (octets) */
+ XFRMA_IPTFS_PKT_SIZE, /* __u32 out: size of outer packet, 0 for PMTU */
__XFRMA_MAX
#define XFRMA_OUTPUT_MARK XFRMA_SET_MARK /* Compatibility */
diff --git a/net/xfrm/xfrm_compat.c b/net/xfrm/xfrm_compat.c
index 91357ccaf4af..5c55e07f3d10 100644
--- a/net/xfrm/xfrm_compat.c
+++ b/net/xfrm/xfrm_compat.c
@@ -282,9 +282,15 @@ static int xfrm_xlate64_attr(struct sk_buff *dst, const struct nlattr *src)
case XFRMA_MTIMER_THRESH:
case XFRMA_SA_DIR:
case XFRMA_NAT_KEEPALIVE_INTERVAL:
+ case XFRMA_IPTFS_DROP_TIME:
+ case XFRMA_IPTFS_REORDER_WINDOW:
+ case XFRMA_IPTFS_DONT_FRAG:
+ case XFRMA_IPTFS_INIT_DELAY:
+ case XFRMA_IPTFS_MAX_QSIZE:
+ case XFRMA_IPTFS_PKT_SIZE:
return xfrm_nla_cpy(dst, src, nla_len(src));
default:
- BUILD_BUG_ON(XFRMA_MAX != XFRMA_NAT_KEEPALIVE_INTERVAL);
+ BUILD_BUG_ON(XFRMA_MAX != XFRMA_IPTFS_PKT_SIZE);
pr_warn_once("unsupported nla_type %d\n", src->nla_type);
return -EOPNOTSUPP;
}
@@ -439,7 +445,7 @@ static int xfrm_xlate32_attr(void *dst, const struct nlattr *nla,
int err;
if (type > XFRMA_MAX) {
- BUILD_BUG_ON(XFRMA_MAX != XFRMA_NAT_KEEPALIVE_INTERVAL);
+ BUILD_BUG_ON(XFRMA_MAX != XFRMA_IPTFS_PKT_SIZE);
NL_SET_ERR_MSG(extack, "Bad attribute");
return -EOPNOTSUPP;
}
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index a552cfa623ea..1d1122c8d501 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -297,6 +297,16 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
NL_SET_ERR_MSG(extack, "TFC padding can only be used in tunnel mode");
goto out;
}
+ if ((attrs[XFRMA_IPTFS_DROP_TIME] ||
+ attrs[XFRMA_IPTFS_REORDER_WINDOW] ||
+ attrs[XFRMA_IPTFS_DONT_FRAG] ||
+ attrs[XFRMA_IPTFS_INIT_DELAY] ||
+ attrs[XFRMA_IPTFS_MAX_QSIZE] ||
+ attrs[XFRMA_IPTFS_PKT_SIZE]) &&
+ p->mode != XFRM_MODE_IPTFS) {
+ NL_SET_ERR_MSG(extack, "IP-TFS options can only be used in IP-TFS mode");
+ goto out;
+ }
break;
case IPPROTO_COMP:
@@ -417,6 +427,18 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
goto out;
}
+ if (attrs[XFRMA_IPTFS_DROP_TIME]) {
+ NL_SET_ERR_MSG(extack, "IP-TFS drop time should not be set for output SA");
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (attrs[XFRMA_IPTFS_REORDER_WINDOW]) {
+ NL_SET_ERR_MSG(extack, "IP-TFS reorder window should not be set for output SA");
+ err = -EINVAL;
+ goto out;
+ }
+
if (attrs[XFRMA_REPLAY_VAL]) {
struct xfrm_replay_state *replay;
@@ -454,6 +476,30 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
}
}
+
+ if (attrs[XFRMA_IPTFS_DONT_FRAG]) {
+ NL_SET_ERR_MSG(extack, "IP-TFS don't fragment should not be set for input SA");
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (attrs[XFRMA_IPTFS_INIT_DELAY]) {
+ NL_SET_ERR_MSG(extack, "IP-TFS initial delay should not be set for input SA");
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (attrs[XFRMA_IPTFS_MAX_QSIZE]) {
+ NL_SET_ERR_MSG(extack, "IP-TFS max queue size should not be set for input SA");
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (attrs[XFRMA_IPTFS_PKT_SIZE]) {
+ NL_SET_ERR_MSG(extack, "IP-TFS packet size should not be set for input SA");
+ err = -EINVAL;
+ goto out;
+ }
}
out:
@@ -3177,6 +3223,12 @@ const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
[XFRMA_MTIMER_THRESH] = { .type = NLA_U32 },
[XFRMA_SA_DIR] = NLA_POLICY_RANGE(NLA_U8, XFRM_SA_DIR_IN, XFRM_SA_DIR_OUT),
[XFRMA_NAT_KEEPALIVE_INTERVAL] = { .type = NLA_U32 },
+ [XFRMA_IPTFS_DROP_TIME] = { .type = NLA_U32 },
+ [XFRMA_IPTFS_REORDER_WINDOW] = { .type = NLA_U16 },
+ [XFRMA_IPTFS_DONT_FRAG] = { .type = NLA_FLAG },
+ [XFRMA_IPTFS_INIT_DELAY] = { .type = NLA_U32 },
+ [XFRMA_IPTFS_MAX_QSIZE] = { .type = NLA_U32 },
+ [XFRMA_IPTFS_PKT_SIZE] = { .type = NLA_U32 },
};
EXPORT_SYMBOL_GPL(xfrma_policy);
--
2.45.2
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