HACK: net: ioctl: Adding switch configuration via ioctl

A switch can be configured in various combination of switch entry for
controling packet flow between the ports

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

include/uapi/linux/net_switch_config.h

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Texas Instruments Ethernet Switch Driver
+ *
+ * Copyright (C) 2014-2018 Texas Instruments, Inc
+ *
+ * Userspace API for Switch Configuration
+ */
+
+#ifndef __NET_CONFIG_SWITCH_H__
+#define __NET_CONFIG_SWITCH_H__
+
+enum {
+	CONFIG_SWITCH_INVALID,
+	CONFIG_SWITCH_ADD_MULTICAST,
+	CONFIG_SWITCH_DEL_MULTICAST,
+	CONFIG_SWITCH_ADD_VLAN,
+	CONFIG_SWITCH_DEL_VLAN,
+};
+
+/*
+ * Pass all unused parameters as zero is recomented.
+ */
+struct net_switch_config {
+	unsigned int cmd;	/* API to be invoked by the kernel driver */
+
+	unsigned int	port;
+	unsigned int	vid;		/* VLAN identifier */
+	unsigned char	unreg_multi;	/* unreg multicast Egress Ports */
+	unsigned char	reg_multi;	/* register multicast Egress ports */
+	unsigned char	untag_port;	/* Untag ports */
+	unsigned char	addr[6];
+	unsigned int	super;
+
+	unsigned int ret_type;   /* Return  Success/Failure */
+};
+
+#endif /* __NET_CONFIG_SWITCH_H__*/

include/uapi/linux/sockios.h

@@ -132,6 +132,9 @@
 #define SIOCSHWTSTAMP	0x89b0		/* set and get config		*/
 #define SIOCGHWTSTAMP	0x89b1		/* get config			*/
 
+/* Switch config calls: parameters in linux/net_switch_config.h */
+#define SIOCSWITCHCONFIG    0x89c0
+
 /* Device private ioctl calls */
 
 /*

net/core/dev_ioctl.c

@@ -315,6 +315,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
 		    cmd == SIOCBRDELIF ||
 		    cmd == SIOCSHWTSTAMP ||
 		    cmd == SIOCGHWTSTAMP ||
+		    cmd == SIOCSWITCHCONFIG ||
 		    cmd == SIOCWANDEV) {
 			err = -EOPNOTSUPP;
 			if (ops->ndo_do_ioctl) {
@@ -500,6 +501,12 @@ int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, bool *need_c
 	case SIOCSIFLINK:
 		return -ENOTTY;
 
+	case SIOCSWITCHCONFIG:
+		rtnl_lock();
+		ret = dev_ifsioc(net, ifr, cmd);
+		rtnl_unlock();
+		return ret;
+
 	/*
 	 *	Unknown or private ioctl.
 	 */