netdev - [PATCH iproute2-next v2 2/3] ip: Present the VF VLAN tagging mode

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Date:   Thu, 31 Oct 2019 19:55:33 +0000
From:   Ariel Levkovich <lariel@...lanox.com>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     Jiri Pirko <jiri@...lanox.com>,
        "stephen@...workplumber.org" <stephen@...workplumber.org>,
        Ariel Levkovich <lariel@...lanox.com>
Subject: [PATCH iproute2-next v2 2/3] ip: Present the VF VLAN tagging mode

The change prints the VLAN tagging mode per VF on
link query.

The possible modes are:
1) VGT - Virtual Guest tagging mode.
2) VST - Virtual Switch tagging mode.
3) Trunk - Guest tagging mode with specific allowed VLAN access list.

For the full VLAN ids list in Trunk mode, it is required to
query the specific VF.

Signed-off-by: Ariel Levkovich <lariel@...lanox.com>
---
 include/uapi/linux/if_link.h | 14 ++++++++++++++
 ip/ipaddress.c               | 18 +++++++++++++++++-
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index d39017b..6304add 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -697,6 +697,7 @@ enum {
 	IFLA_VF_IB_PORT_GUID,	/* VF Infiniband port GUID */
 	IFLA_VF_VLAN_LIST,	/* nested list of vlans, option for QinQ */
 	IFLA_VF_BROADCAST,	/* VF broadcast */
+	IFLA_VF_VLAN_MODE,	/* vlan tagging mode */
 	__IFLA_VF_MAX,
 };
 
@@ -711,6 +712,19 @@ struct ifla_vf_broadcast {
 	__u8 broadcast[32];
 };
 
+enum {
+	IFLA_VF_VLAN_MODE_UNSPEC,
+	IFLA_VF_VLAN_MODE_VGT,
+	IFLA_VF_VLAN_MODE_VST,
+	IFLA_VF_VLAN_MODE_TRUNK,
+	__IFLA_VF_VLAN_MODE_MAX,
+};
+
+struct ifla_vf_vlan_mode {
+	__u32 vf;
+	__u32 mode; /* The VLAN tagging mode */
+};
+
 struct ifla_vf_vlan {
 	__u32 vf;
 	__u32 vlan; /* 0 - 4095, 0 disables VLAN filter */
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 0521fdc..9c04cee 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -351,13 +351,19 @@ static void print_af_spec(FILE *fp, struct rtattr *af_spec_attr)
 
 static void print_vf_stats64(FILE *fp, struct rtattr *vfstats);
 
+static const char *vlan_modes[] = {
+	[IFLA_VF_VLAN_MODE_UNSPEC] = "n/a",
+	[IFLA_VF_VLAN_MODE_VGT] = "vgt",
+	[IFLA_VF_VLAN_MODE_VST] = "vst",
+	[IFLA_VF_VLAN_MODE_TRUNK] = "trunk",
+};
+
 static void print_vfinfo(FILE *fp, struct ifinfomsg *ifi, struct rtattr *vfinfo)
 {
 	struct ifla_vf_mac *vf_mac;
 	struct ifla_vf_broadcast *vf_broadcast;
 	struct ifla_vf_tx_rate *vf_tx_rate;
 	struct rtattr *vf[IFLA_VF_MAX + 1] = {};
-
 	SPRINT_BUF(b1);
 
 	if (vfinfo->rta_type != IFLA_VF_INFO) {
@@ -404,6 +410,16 @@ static void print_vfinfo(FILE *fp, struct ifinfomsg *ifi, struct rtattr *vfinfo)
 					       b1, sizeof(b1)));
 	}
 
+	if (vf[IFLA_VF_VLAN_MODE]) {
+		struct ifla_vf_vlan_mode *vlan_mode = RTA_DATA(vf[IFLA_VF_VLAN_MODE]);
+
+		if (vlan_mode->mode >= ARRAY_SIZE(vlan_modes))
+			print_int(PRINT_ANY, "vlan_mode", ", vlan_mode %d ", vlan_mode->mode);
+		else
+			print_string(PRINT_ANY, "vlan_mode", ", vlan_mode %s",
+			     	     vlan_modes[vlan_mode->mode]);
+	}
+
 	if (vf[IFLA_VF_VLAN_LIST]) {
 		struct rtattr *i, *vfvlanlist = vf[IFLA_VF_VLAN_LIST];
 		int rem = RTA_PAYLOAD(vfvlanlist);
-- 
1.8.3.1