netdev - [RFC ipsec-next 5/8] iptfs: netlink: add config (netlink) options

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Date: Fri, 10 Nov 2023 06:37:16 -0500
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@...n.net>
Subject: [RFC ipsec-next 5/8] iptfs: 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 |  6 ++++++
 net/xfrm/xfrm_user.c      | 16 ++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/include/uapi/linux/xfrm.h b/include/uapi/linux/xfrm.h
index 6a77328be114..fa6d264f2ad1 100644
--- a/include/uapi/linux/xfrm.h
+++ b/include/uapi/linux/xfrm.h
@@ -315,6 +315,12 @@ enum xfrm_attr_type_t {
 	XFRMA_SET_MARK_MASK,	/* __u32 */
 	XFRMA_IF_ID,		/* __u32 */
 	XFRMA_MTIMER_THRESH,	/* __u32 in seconds for input SA */
+	XFRMA_IPTFS_PKT_SIZE,	/* __u32 Size of outer packet, 0 for PMTU */
+	XFRMA_IPTFS_MAX_QSIZE,	/* __u32 max ingress queue size */
+	XFRMA_IPTFS_DONT_FRAG,	/* don't use fragmentation */
+	XFRMA_IPTFS_DROP_TIME,	/* __u32 usec to wait for next seq */
+	XFRMA_IPTFS_REORD_WIN,	/* __u16 reorder window size */
+	XFRMA_IPTFS_IN_DELAY,	/* __u32 initial packet wait delay (usec) */
 	__XFRMA_MAX
 
 #define XFRMA_OUTPUT_MARK XFRMA_SET_MARK	/* Compatibility */
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index ad01997c3aa9..ed95772bbd3f 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -272,6 +272,16 @@ 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_PKT_SIZE] ||
+		     attrs[XFRMA_IPTFS_MAX_QSIZE] ||
+		     attrs[XFRMA_IPTFS_DONT_FRAG] ||
+		     attrs[XFRMA_IPTFS_DROP_TIME] ||
+		     attrs[XFRMA_IPTFS_REORD_WIN] ||
+		     attrs[XFRMA_IPTFS_IN_DELAY]) &&
+		    p->mode != XFRM_MODE_IPTFS) {
+			NL_SET_ERR_MSG(extack, "IPTFS options can only be used in IPTFS mode");
+			goto out;
+		}
 		break;
 
 	case IPPROTO_COMP:
@@ -3046,6 +3056,12 @@ const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
 	[XFRMA_SET_MARK_MASK]	= { .type = NLA_U32 },
 	[XFRMA_IF_ID]		= { .type = NLA_U32 },
 	[XFRMA_MTIMER_THRESH]   = { .type = NLA_U32 },
+	[XFRMA_IPTFS_PKT_SIZE]	= { .type = NLA_U32 },
+	[XFRMA_IPTFS_MAX_QSIZE]	= { .type = NLA_U32 },
+	[XFRMA_IPTFS_DONT_FRAG]	= { .type = NLA_FLAG },
+	[XFRMA_IPTFS_DROP_TIME]	= { .type = NLA_U32 },
+	[XFRMA_IPTFS_REORD_WIN]	= { .type = NLA_U16 },
+	[XFRMA_IPTFS_IN_DELAY]	= { .type = NLA_U32 },
 };
 EXPORT_SYMBOL_GPL(xfrma_policy);
 
-- 
2.42.0