iproute2: Add new command to ip link to enable/disable VF spoof check

Add ip link command parsing for VF spoof checking enable/disable

V2 - Fixed problem with parsing of dump info on kernels that don't
     support the spoof checking option and also wrapped the ifla_vf_info
     structure in #ifdef __KERNEL__ to prevent user space from directly
     accessing the structure
V3 - Improved parsing of vfinfo
V4 - Put Makefile back to proper list of subdirs
V5 - Remove struct ifla_vf_info, it is only used by the kernel
V6 - Make sure spoof check is reported by the driver - rtnl will set
     it to -1 to indicate driver didn't report a value.
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

ip/ipaddress.c

@@ -197,7 +197,9 @@ static void print_vfinfo(FILE *fp, struct rtattr *vfinfo)
 	struct ifla_vf_mac *vf_mac;
 	struct ifla_vf_vlan *vf_vlan;
 	struct ifla_vf_tx_rate *vf_tx_rate;
+	struct ifla_vf_spoofchk *vf_spoofchk;
 	struct rtattr *vf[IFLA_VF_MAX+1];
+	struct rtattr *tmp;
 	SPRINT_BUF(b1);
 
 	if (vfinfo->rta_type != IFLA_VF_INFO) {
@@ -211,6 +213,17 @@ static void print_vfinfo(FILE *fp, struct rtattr *vfinfo)
 	vf_vlan = RTA_DATA(vf[IFLA_VF_VLAN]);
 	vf_tx_rate = RTA_DATA(vf[IFLA_VF_TX_RATE]);
 
+	/* Check if the spoof checking vf info type is supported by
+	 * this kernel.
+	 */
+	tmp = (struct rtattr *)((char *)vf[IFLA_VF_TX_RATE] +
+			vf[IFLA_VF_TX_RATE]->rta_len);
+
+	if (tmp->rta_type != IFLA_VF_SPOOFCHK)
+		vf_spoofchk = NULL;
+	else
+		vf_spoofchk = RTA_DATA(vf[IFLA_VF_SPOOFCHK]);
+
 	fprintf(fp, "\n    vf %d MAC %s", vf_mac->vf,
 		ll_addr_n2a((unsigned char *)&vf_mac->mac,
 		ETH_ALEN, 0, b1, sizeof(b1)));
@@ -220,6 +233,12 @@ static void print_vfinfo(FILE *fp, struct rtattr *vfinfo)
 		fprintf(fp, ", qos %d", vf_vlan->qos);
 	if (vf_tx_rate->rate)
 		fprintf(fp, ", tx rate %d (Mbps)", vf_tx_rate->rate);
+	if (vf_spoofchk && vf_spoofchk->setting != -1) {
+		if (vf_spoofchk->setting)
+			fprintf(fp, ", spoof checking on");
+		else
+			fprintf(fp, ", spoof checking off");
+	}
 }
 
 int print_linkinfo(const struct sockaddr_nl *who,

ip/iplink.c

@@ -71,7 +71,10 @@ void iplink_usage(void)
 	fprintf(stderr, "			  [ alias NAME ]\n");
 	fprintf(stderr, "	                  [ vf NUM [ mac LLADDR ]\n");
 	fprintf(stderr, "				   [ vlan VLANID [ qos VLAN-QOS ] ]\n");
+
 	fprintf(stderr, "				   [ rate TXRATE ] ] \n");
+
+	fprintf(stderr, "				   [ spoofchk { on | off} ] ] \n");
 	fprintf(stderr, "			  [ master DEVICE ]\n");
 	fprintf(stderr, "			  [ nomaster ]\n");
 	fprintf(stderr, "       ip link show [ DEVICE | group GROUP ]\n");
@@ -228,6 +231,18 @@ int iplink_parse_vf(int vf, int *argcp, char ***argvp,
 			ivt.vf = vf;
 			addattr_l(&req->n, sizeof(*req), IFLA_VF_TX_RATE, &ivt, sizeof(ivt));
 		
+		} else if (matches(*argv, "spoofchk") == 0) {
+			struct ifla_vf_spoofchk ivs;
+			NEXT_ARG();
+			if (matches(*argv, "on") == 0)
+				ivs.setting = 1;
+			else if (matches(*argv, "off") == 0)
+				ivs.setting = 0;
+			else
+				invarg("Invalid \"spoofchk\" value\n", *argv);
+			ivs.vf = vf;
+			addattr_l(&req->n, sizeof(*req), IFLA_VF_SPOOFCHK, &ivs, sizeof(ivs));
+
 		} else {
 			/* rewind arg */
 			PREV_ARG();

man/man8/ip.8

@@ -100,7 +100,9 @@ ip \- show / manipulate routing, devices, policy routing and tunnels
 .B qos
 .IR VLAN-QOS " ] ] ["
 .B rate
-.IR TXRATE " ] |"
+.IR TXRATE " ] ["
+.B spoofchk { on | off }
+] |
 .br
 .B master
 .IR DEVICE