platform: detect kernel support for FRA_PROTOCOL

3 files changed, 13 insertions, 0 deletions

diff --git a/src/platform/nm-linux-platform.c b/src/platform/nm-linux-platform.c
index 0e84f99f4c..662f3d7046 100644
--- a/src/platform/nm-linux-platform.c
+++ b/src/platform/nm-linux-platform.c
@@ -3414,6 +3414,13 @@ _new_from_nl_routing_rule (struct nlmsghdr *nlh, gboolean id_only)
 	else
 		nm_assert (props->protocol == RTPROT_UNSPEC);
 
+	if (!_nm_platform_kernel_support_detected (NM_PLATFORM_KERNEL_SUPPORT_TYPE_FRA_PROTOCOL)) {
+		/* FRA_PROTOCOL was added in kernel 4.17, dated 3 June, 2018.
+		 * See commit 1b71af6053af1bd2f849e9fda4f71c1e3f145dcf. */
+		_nm_platform_kernel_support_init (NM_PLATFORM_KERNEL_SUPPORT_TYPE_FRA_PROTOCOL,
+		                                  tb[FRA_PROTOCOL] ? 1 : -1);
+	}
+
 	if (tb[FRA_IP_PROTO])
 		props->ip_proto = nla_get_u8 (tb[FRA_IP_PROTO]);
 
diff --git a/src/platform/nm-platform.c b/src/platform/nm-platform.c
index 88f2b0decf..b5636d60d5 100644
--- a/src/platform/nm-platform.c
+++ b/src/platform/nm-platform.c
@@ -296,6 +296,11 @@ static const struct {
 		.name                 = "RTA_PREF",
 		.desc                 = "ability to set router preference for IPv6 routes",
 	},
+	[NM_PLATFORM_KERNEL_SUPPORT_TYPE_FRA_PROTOCOL] = {
+		.compile_time_default = (FRA_MAX >= 21 /* FRA_PROTOCOL */),
+		.name                 = "FRA_PROTOCOL",
+		.desc                 = "FRA_PROTOCOL attribute for policy routing rules",
+	},
 };
 
 int
diff --git a/src/platform/nm-platform.h b/src/platform/nm-platform.h
index d5a7a2d182..1d5b18402a 100644
--- a/src/platform/nm-platform.h
+++ b/src/platform/nm-platform.h
@@ -848,6 +848,7 @@ typedef enum {
 	NM_PLATFORM_KERNEL_SUPPORT_TYPE_EXTENDED_IFA_FLAGS,
 	NM_PLATFORM_KERNEL_SUPPORT_TYPE_USER_IPV6LL,
 	NM_PLATFORM_KERNEL_SUPPORT_TYPE_RTA_PREF,
+	NM_PLATFORM_KERNEL_SUPPORT_TYPE_FRA_PROTOCOL,
 	_NM_PLATFORM_KERNEL_SUPPORT_NUM,
 } NMPlatformKernelSupportType;