[deliverable/linux.git] / net / switchdev / switchdev.c

/*
 * net/switchdev/switchdev.c - Switch device API
 * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/netdevice.h>
#include <net/ip_fib.h>
#include <net/switchdev.h>

/**
 *	netdev_switch_parent_id_get - Get ID of a switch
 *	@dev: port device
 *	@psid: switch ID
 *
 *	Get ID of a switch this port is part of.
 */
int netdev_switch_parent_id_get(struct net_device *dev,
				struct netdev_phys_item_id *psid)
{
	const struct net_device_ops *ops = dev->netdev_ops;

	if (!ops->ndo_switch_parent_id_get)
		return -EOPNOTSUPP;
	return ops->ndo_switch_parent_id_get(dev, psid);
}
EXPORT_SYMBOL(netdev_switch_parent_id_get);

/**
 *	netdev_switch_port_stp_update - Notify switch device port of STP
 *					state change
 *	@dev: port device
 *	@state: port STP state
 *
 *	Notify switch device port of bridge port STP state change.
 */
int netdev_switch_port_stp_update(struct net_device *dev, u8 state)
{
	const struct net_device_ops *ops = dev->netdev_ops;

	if (!ops->ndo_switch_port_stp_update)
		return -EOPNOTSUPP;
	WARN_ON(!ops->ndo_switch_parent_id_get);
	return ops->ndo_switch_port_stp_update(dev, state);
}
EXPORT_SYMBOL(netdev_switch_port_stp_update);

static DEFINE_MUTEX(netdev_switch_mutex);
static RAW_NOTIFIER_HEAD(netdev_switch_notif_chain);

/**
 *	register_netdev_switch_notifier - Register nofifier
 *	@nb: notifier_block
 *
 *	Register switch device notifier. This should be used by code
 *	which needs to monitor events happening in particular device.
 *	Return values are same as for atomic_notifier_chain_register().
 */
int register_netdev_switch_notifier(struct notifier_block *nb)
{
	int err;

	mutex_lock(&netdev_switch_mutex);
	err = raw_notifier_chain_register(&netdev_switch_notif_chain, nb);
	mutex_unlock(&netdev_switch_mutex);
	return err;
}
EXPORT_SYMBOL(register_netdev_switch_notifier);

/**
 *	unregister_netdev_switch_notifier - Unregister nofifier
 *	@nb: notifier_block
 *
 *	Unregister switch device notifier.
 *	Return values are same as for atomic_notifier_chain_unregister().
 */
int unregister_netdev_switch_notifier(struct notifier_block *nb)
{
	int err;

	mutex_lock(&netdev_switch_mutex);
	err = raw_notifier_chain_unregister(&netdev_switch_notif_chain, nb);
	mutex_unlock(&netdev_switch_mutex);
	return err;
}
EXPORT_SYMBOL(unregister_netdev_switch_notifier);

/**
 *	call_netdev_switch_notifiers - Call nofifiers
 *	@val: value passed unmodified to notifier function
 *	@dev: port device
 *	@info: notifier information data
 *
 *	Call all network notifier blocks. This should be called by driver
 *	when it needs to propagate hardware event.
 *	Return values are same as for atomic_notifier_call_chain().
 */
int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,
				 struct netdev_switch_notifier_info *info)
{
	int err;

	info->dev = dev;
	mutex_lock(&netdev_switch_mutex);
	err = raw_notifier_call_chain(&netdev_switch_notif_chain, val, info);
	mutex_unlock(&netdev_switch_mutex);
	return err;
}
EXPORT_SYMBOL(call_netdev_switch_notifiers);

/**
 *	netdev_switch_port_bridge_setlink - Notify switch device port of bridge
 *	port attributes
 *
 *	@dev: port device
 *	@nlh: netlink msg with bridge port attributes
 *	@flags: bridge setlink flags
 *
 *	Notify switch device port of bridge port attributes
 */
int netdev_switch_port_bridge_setlink(struct net_device *dev,
				      struct nlmsghdr *nlh, u16 flags)
{
	const struct net_device_ops *ops = dev->netdev_ops;

	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
		return 0;

	if (!ops->ndo_bridge_setlink)
		return -EOPNOTSUPP;

	return ops->ndo_bridge_setlink(dev, nlh, flags);
}
EXPORT_SYMBOL(netdev_switch_port_bridge_setlink);

/**
 *	netdev_switch_port_bridge_dellink - Notify switch device port of bridge
 *	port attribute delete
 *
 *	@dev: port device
 *	@nlh: netlink msg with bridge port attributes
 *	@flags: bridge setlink flags
 *
 *	Notify switch device port of bridge port attribute delete
 */
int netdev_switch_port_bridge_dellink(struct net_device *dev,
				      struct nlmsghdr *nlh, u16 flags)
{
	const struct net_device_ops *ops = dev->netdev_ops;

	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
		return 0;

	if (!ops->ndo_bridge_dellink)
		return -EOPNOTSUPP;

	return ops->ndo_bridge_dellink(dev, nlh, flags);
}
EXPORT_SYMBOL(netdev_switch_port_bridge_dellink);

/**
 *	ndo_dflt_netdev_switch_port_bridge_setlink - default ndo bridge setlink
 *						     op for master devices
 *
 *	@dev: port device
 *	@nlh: netlink msg with bridge port attributes
 *	@flags: bridge setlink flags
 *
 *	Notify master device slaves of bridge port attributes
 */
int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *dev,
					       struct nlmsghdr *nlh, u16 flags)
{
	struct net_device *lower_dev;
	struct list_head *iter;
	int ret = 0, err = 0;

	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
		return ret;

	netdev_for_each_lower_dev(dev, lower_dev, iter) {
		err = netdev_switch_port_bridge_setlink(lower_dev, nlh, flags);
		if (err && err != -EOPNOTSUPP)
			ret = err;
	}

	return ret;
}
EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_setlink);

/**
 *	ndo_dflt_netdev_switch_port_bridge_dellink - default ndo bridge dellink
 *						     op for master devices
 *
 *	@dev: port device
 *	@nlh: netlink msg with bridge port attributes
 *	@flags: bridge dellink flags
 *
 *	Notify master device slaves of bridge port attribute deletes
 */
int ndo_dflt_netdev_switch_port_bridge_dellink(struct net_device *dev,
					       struct nlmsghdr *nlh, u16 flags)
{
	struct net_device *lower_dev;
	struct list_head *iter;
	int ret = 0, err = 0;

	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
		return ret;

	netdev_for_each_lower_dev(dev, lower_dev, iter) {
		err = netdev_switch_port_bridge_dellink(lower_dev, nlh, flags);
		if (err && err != -EOPNOTSUPP)
			ret = err;
	}

	return ret;
}
EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_dellink);

static struct net_device *netdev_switch_get_lowest_dev(struct net_device *dev)
{
	const struct net_device_ops *ops = dev->netdev_ops;
	struct net_device *lower_dev;
	struct net_device *port_dev;
	struct list_head *iter;

	/* Recusively search down until we find a sw port dev.
	 * (A sw port dev supports ndo_switch_parent_id_get).
	 */

	if (dev->features & NETIF_F_HW_SWITCH_OFFLOAD &&
	    ops->ndo_switch_parent_id_get)
		return dev;

	netdev_for_each_lower_dev(dev, lower_dev, iter) {
		port_dev = netdev_switch_get_lowest_dev(lower_dev);
		if (port_dev)
			return port_dev;
	}

	return NULL;
}

static struct net_device *netdev_switch_get_dev_by_nhs(struct fib_info *fi)
{
	struct netdev_phys_item_id psid;
	struct netdev_phys_item_id prev_psid;
	struct net_device *dev = NULL;
	int nhsel;

	/* For this route, all nexthop devs must be on the same switch. */

	for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) {
		const struct fib_nh *nh = &fi->fib_nh[nhsel];

		if (!nh->nh_dev)
			return NULL;

		dev = netdev_switch_get_lowest_dev(nh->nh_dev);
		if (!dev)
			return NULL;

		if (netdev_switch_parent_id_get(dev, &psid))
			return NULL;

		if (nhsel > 0) {
			if (prev_psid.id_len != psid.id_len)
				return NULL;
			if (memcmp(prev_psid.id, psid.id, psid.id_len))
				return NULL;
		}

		prev_psid = psid;
	}

	return dev;
}

/**
 *	netdev_switch_fib_ipv4_add - Add IPv4 route entry to switch
 *
 *	@dst: route's IPv4 destination address
 *	@dst_len: destination address length (prefix length)
 *	@fi: route FIB info structure
 *	@tos: route TOS
 *	@type: route type
 *	@tb_id: route table ID
 *
 *	Add IPv4 route entry to switch device.
 */
int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
			       u8 tos, u8 type, u32 tb_id)
{
	struct net_device *dev;
	const struct net_device_ops *ops;
	int err = 0;

	/* Don't offload route if using custom ip rules or if
	 * IPv4 FIB offloading has been disabled completely.
	 */

	if (fi->fib_net->ipv4.fib_has_custom_rules |
	    fi->fib_net->ipv4.fib_offload_disabled)
		return 0;

	dev = netdev_switch_get_dev_by_nhs(fi);
	if (!dev)
		return 0;
	ops = dev->netdev_ops;

	if (ops->ndo_switch_fib_ipv4_add) {
		err = ops->ndo_switch_fib_ipv4_add(dev, htonl(dst), dst_len,
						   fi, tos, type, tb_id);
		if (!err)
			fi->fib_flags |= RTNH_F_EXTERNAL;
	}

	return err;
}
EXPORT_SYMBOL(netdev_switch_fib_ipv4_add);

/**
 *	netdev_switch_fib_ipv4_del - Delete IPv4 route entry from switch
 *
 *	@dst: route's IPv4 destination address
 *	@dst_len: destination address length (prefix length)
 *	@fi: route FIB info structure
 *	@tos: route TOS
 *	@type: route type
 *	@tb_id: route table ID
 *
 *	Delete IPv4 route entry from switch device.
 */
int netdev_switch_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
			       u8 tos, u8 type, u32 tb_id)
{
	struct net_device *dev;
	const struct net_device_ops *ops;
	int err = 0;

	if (!(fi->fib_flags & RTNH_F_EXTERNAL))
		return 0;

	dev = netdev_switch_get_dev_by_nhs(fi);
	if (!dev)
		return 0;
	ops = dev->netdev_ops;

	if (ops->ndo_switch_fib_ipv4_del) {
		err = ops->ndo_switch_fib_ipv4_del(dev, htonl(dst), dst_len,
						   fi, tos, type, tb_id);
		if (!err)
			fi->fib_flags &= ~RTNH_F_EXTERNAL;
	}

	return err;
}
EXPORT_SYMBOL(netdev_switch_fib_ipv4_del);

/**
 *	netdev_switch_fib_ipv4_abort - Abort an IPv4 FIB operation
 *
 *	@fi: route FIB info structure
 */
void netdev_switch_fib_ipv4_abort(struct fib_info *fi)
{
	/* There was a problem installing this route to the offload
	 * device.  For now, until we come up with more refined
	 * policy handling, abruptly end IPv4 fib offloading for
	 * for entire net by flushing offload device(s) of all
	 * IPv4 routes, and mark IPv4 fib offloading broken from
	 * this point forward.
	 */

	fib_flush_external(fi->fib_net);
	fi->fib_net->ipv4.fib_offload_disabled = true;
}
EXPORT_SYMBOL(netdev_switch_fib_ipv4_abort);
Commit	Line	Data
007f790c JP	1	/*
	2	* net/switchdev/switchdev.c - Switch device API
	3	* Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*/
	10
	11	#include <linux/kernel.h>
	12	#include <linux/types.h>
	13	#include <linux/init.h>
03bf0c28 JP	14	#include <linux/mutex.h>
03bf0c28 JP	15	#include <linux/notifier.h>
007f790c	16	#include <linux/netdevice.h>
5e8d9049	17	#include <net/ip_fib.h>
007f790c JP	18	#include <net/switchdev.h>
	19
	20	/**
	21	* netdev_switch_parent_id_get - Get ID of a switch
	22	* @dev: port device
	23	* @psid: switch ID
	24	*
	25	* Get ID of a switch this port is part of.
	26	*/
	27	int netdev_switch_parent_id_get(struct net_device *dev,
	28	struct netdev_phys_item_id *psid)
	29	{
	30	const struct net_device_ops *ops = dev->netdev_ops;
	31
	32	if (!ops->ndo_switch_parent_id_get)
	33	return -EOPNOTSUPP;
	34	return ops->ndo_switch_parent_id_get(dev, psid);
	35	}
	36	EXPORT_SYMBOL(netdev_switch_parent_id_get);
38dcf357 SF	37
	38	/**
	39	* netdev_switch_port_stp_update - Notify switch device port of STP
	40	* state change
	41	* @dev: port device
	42	* @state: port STP state
	43	*
	44	* Notify switch device port of bridge port STP state change.
	45	*/
	46	int netdev_switch_port_stp_update(struct net_device *dev, u8 state)
	47	{
	48	const struct net_device_ops *ops = dev->netdev_ops;
	49
	50	if (!ops->ndo_switch_port_stp_update)
	51	return -EOPNOTSUPP;
	52	WARN_ON(!ops->ndo_switch_parent_id_get);
	53	return ops->ndo_switch_port_stp_update(dev, state);
	54	}
	55	EXPORT_SYMBOL(netdev_switch_port_stp_update);
03bf0c28 JP	56
	57	static DEFINE_MUTEX(netdev_switch_mutex);
	58	static RAW_NOTIFIER_HEAD(netdev_switch_notif_chain);
	59
	60	/**
	61	* register_netdev_switch_notifier - Register nofifier
	62	* @nb: notifier_block
	63	*
	64	* Register switch device notifier. This should be used by code
	65	* which needs to monitor events happening in particular device.
	66	* Return values are same as for atomic_notifier_chain_register().
	67	*/
	68	int register_netdev_switch_notifier(struct notifier_block *nb)
	69	{
	70	int err;
	71
	72	mutex_lock(&netdev_switch_mutex);
	73	err = raw_notifier_chain_register(&netdev_switch_notif_chain, nb);
	74	mutex_unlock(&netdev_switch_mutex);
	75	return err;
	76	}
	77	EXPORT_SYMBOL(register_netdev_switch_notifier);
	78
	79	/**
	80	* unregister_netdev_switch_notifier - Unregister nofifier
	81	* @nb: notifier_block
	82	*
	83	* Unregister switch device notifier.
	84	* Return values are same as for atomic_notifier_chain_unregister().
	85	*/
	86	int unregister_netdev_switch_notifier(struct notifier_block *nb)
	87	{
	88	int err;
	89
	90	mutex_lock(&netdev_switch_mutex);
	91	err = raw_notifier_chain_unregister(&netdev_switch_notif_chain, nb);
	92	mutex_unlock(&netdev_switch_mutex);
	93	return err;
	94	}
	95	EXPORT_SYMBOL(unregister_netdev_switch_notifier);
	96
	97	/**
	98	* call_netdev_switch_notifiers - Call nofifiers
	99	* @val: value passed unmodified to notifier function
	100	* @dev: port device
	101	* @info: notifier information data
	102	*
	103	* Call all network notifier blocks. This should be called by driver
	104	* when it needs to propagate hardware event.
	105	* Return values are same as for atomic_notifier_call_chain().
	106	*/
	107	int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,
	108	struct netdev_switch_notifier_info *info)
	109	{
	110	int err;
	111
	112	info->dev = dev;
	113	mutex_lock(&netdev_switch_mutex);
	114	err = raw_notifier_call_chain(&netdev_switch_notif_chain, val, info);
	115	mutex_unlock(&netdev_switch_mutex);
	116	return err;
	117	}
	118	EXPORT_SYMBOL(call_netdev_switch_notifiers);
8a44dbb2 RP	119
	120	/**
	121	* netdev_switch_port_bridge_setlink - Notify switch device port of bridge
	122	* port attributes
	123	*
	124	* @dev: port device
	125	* @nlh: netlink msg with bridge port attributes
	126	* @flags: bridge setlink flags
	127	*
	128	* Notify switch device port of bridge port attributes
	129	*/
	130	int netdev_switch_port_bridge_setlink(struct net_device *dev,
	131	struct nlmsghdr *nlh, u16 flags)
	132	{
	133	const struct net_device_ops *ops = dev->netdev_ops;
	134
	135	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
	136	return 0;
	137
	138	if (!ops->ndo_bridge_setlink)
	139	return -EOPNOTSUPP;
	140
	141	return ops->ndo_bridge_setlink(dev, nlh, flags);
	142	}
	143	EXPORT_SYMBOL(netdev_switch_port_bridge_setlink);
	144
	145	/**
	146	* netdev_switch_port_bridge_dellink - Notify switch device port of bridge
	147	* port attribute delete
	148	*
	149	* @dev: port device
	150	* @nlh: netlink msg with bridge port attributes
	151	* @flags: bridge setlink flags
	152	*
	153	* Notify switch device port of bridge port attribute delete
	154	*/
	155	int netdev_switch_port_bridge_dellink(struct net_device *dev,
	156	struct nlmsghdr *nlh, u16 flags)
	157	{
	158	const struct net_device_ops *ops = dev->netdev_ops;
	159
	160	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
	161	return 0;
	162
	163	if (!ops->ndo_bridge_dellink)
	164	return -EOPNOTSUPP;
	165
	166	return ops->ndo_bridge_dellink(dev, nlh, flags);
	167	}
	168	EXPORT_SYMBOL(netdev_switch_port_bridge_dellink);
	169
	170	/**
	171	* ndo_dflt_netdev_switch_port_bridge_setlink - default ndo bridge setlink
	172	* op for master devices
	173	*
	174	* @dev: port device
	175	* @nlh: netlink msg with bridge port attributes
	176	* @flags: bridge setlink flags
	177	*
	178	* Notify master device slaves of bridge port attributes
	179	*/
	180	int ndo_dflt_netdev_switch_port_bridge_setlink(struct net_device *dev,
	181	struct nlmsghdr *nlh, u16 flags)
	182	{
183	struct net_device *lower_dev;
184	struct list_head *iter;
185	int ret = 0, err = 0;
186
187	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
188	return ret;
189
190	netdev_for_each_lower_dev(dev, lower_dev, iter) {
191	err = netdev_switch_port_bridge_setlink(lower_dev, nlh, flags);
192	if (err && err != -EOPNOTSUPP)
193	ret = err;
194	}
195
196	return ret;
197	}
198	EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_setlink);
199
200	/**
201	* ndo_dflt_netdev_switch_port_bridge_dellink - default ndo bridge dellink
202	* op for master devices
203	*
204	* @dev: port device
205	* @nlh: netlink msg with bridge port attributes
206	* @flags: bridge dellink flags
207	*
208	* Notify master device slaves of bridge port attribute deletes
209	*/
210	int ndo_dflt_netdev_switch_port_bridge_dellink(struct net_device *dev,
211	struct nlmsghdr *nlh, u16 flags)
212	{
213	struct net_device *lower_dev;
214	struct list_head *iter;
215	int ret = 0, err = 0;
216
217	if (!(dev->features & NETIF_F_HW_SWITCH_OFFLOAD))
218	return ret;
219
220	netdev_for_each_lower_dev(dev, lower_dev, iter) {
221	err = netdev_switch_port_bridge_dellink(lower_dev, nlh, flags);
222	if (err && err != -EOPNOTSUPP)
223	ret = err;
224	}
225
226	return ret;
227	}
228	EXPORT_SYMBOL(ndo_dflt_netdev_switch_port_bridge_dellink);
5e8d9049	229
b5d6fbde SF	230	static struct net_device netdev_switch_get_lowest_dev(struct net_device dev)
	231	{
	232	const struct net_device_ops *ops = dev->netdev_ops;
	233	struct net_device *lower_dev;
	234	struct net_device *port_dev;
	235	struct list_head *iter;
	236
	237	/* Recusively search down until we find a sw port dev.
	238	* (A sw port dev supports ndo_switch_parent_id_get).
	239	*/
	240
	241	if (dev->features & NETIF_F_HW_SWITCH_OFFLOAD &&
	242	ops->ndo_switch_parent_id_get)
	243	return dev;
	244
	245	netdev_for_each_lower_dev(dev, lower_dev, iter) {
	246	port_dev = netdev_switch_get_lowest_dev(lower_dev);
	247	if (port_dev)
	248	return port_dev;
	249	}
	250
	251	return NULL;
	252	}
	253
	254	static struct net_device netdev_switch_get_dev_by_nhs(struct fib_info fi)
	255	{
	256	struct netdev_phys_item_id psid;
	257	struct netdev_phys_item_id prev_psid;
	258	struct net_device *dev = NULL;
	259	int nhsel;
	260
	261	/* For this route, all nexthop devs must be on the same switch. */
	262
	263	for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) {
	264	const struct fib_nh *nh = &fi->fib_nh[nhsel];
	265
	266	if (!nh->nh_dev)
	267	return NULL;
	268
	269	dev = netdev_switch_get_lowest_dev(nh->nh_dev);
	270	if (!dev)
	271	return NULL;
	272
	273	if (netdev_switch_parent_id_get(dev, &psid))
	274	return NULL;
	275
	276	if (nhsel > 0) {
	277	if (prev_psid.id_len != psid.id_len)
	278	return NULL;
	279	if (memcmp(prev_psid.id, psid.id, psid.id_len))
	280	return NULL;
	281	}
	282
	283	prev_psid = psid;
	284	}
	285
	286	return dev;
	287	}
	288
5e8d9049 SF	289	/**
	290	* netdev_switch_fib_ipv4_add - Add IPv4 route entry to switch
	291	*
	292	* @dst: route's IPv4 destination address
	293	* @dst_len: destination address length (prefix length)
	294	* @fi: route FIB info structure
	295	* @tos: route TOS
	296	* @type: route type
	297	* @tb_id: route table ID
	298	*
	299	* Add IPv4 route entry to switch device.
	300	*/
	301	int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
	302	u8 tos, u8 type, u32 tb_id)
	303	{
b5d6fbde SF	304	struct net_device *dev;
	305	const struct net_device_ops *ops;
	306	int err = 0;
	307
8e05fd71 SF	308	/* Don't offload route if using custom ip rules or if
	309	* IPv4 FIB offloading has been disabled completely.
	310	*/
	311
	312	if (fi->fib_net->ipv4.fib_has_custom_rules \|
	313	fi->fib_net->ipv4.fib_offload_disabled)
104616e7 SF	314	return 0;
104616e7 SF	315
b5d6fbde SF	316	dev = netdev_switch_get_dev_by_nhs(fi);
	317	if (!dev)
	318	return 0;
	319	ops = dev->netdev_ops;
	320
	321	if (ops->ndo_switch_fib_ipv4_add) {
	322	err = ops->ndo_switch_fib_ipv4_add(dev, htonl(dst), dst_len,
	323	fi, tos, type, tb_id);
	324	if (!err)
	325	fi->fib_flags \|= RTNH_F_EXTERNAL;
	326	}
	327
	328	return err;
5e8d9049 SF	329	}
	330	EXPORT_SYMBOL(netdev_switch_fib_ipv4_add);
	331
	332	/**
	333	* netdev_switch_fib_ipv4_del - Delete IPv4 route entry from switch
	334	*
	335	* @dst: route's IPv4 destination address
	336	* @dst_len: destination address length (prefix length)
	337	* @fi: route FIB info structure
	338	* @tos: route TOS
	339	* @type: route type
	340	* @tb_id: route table ID
	341	*
	342	* Delete IPv4 route entry from switch device.
	343	*/
	344	int netdev_switch_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
	345	u8 tos, u8 type, u32 tb_id)
	346	{
b5d6fbde SF	347	struct net_device *dev;
	348	const struct net_device_ops *ops;
	349	int err = 0;
	350
	351	if (!(fi->fib_flags & RTNH_F_EXTERNAL))
	352	return 0;
	353
	354	dev = netdev_switch_get_dev_by_nhs(fi);
	355	if (!dev)
	356	return 0;
	357	ops = dev->netdev_ops;
	358
	359	if (ops->ndo_switch_fib_ipv4_del) {
	360	err = ops->ndo_switch_fib_ipv4_del(dev, htonl(dst), dst_len,
	361	fi, tos, type, tb_id);
	362	if (!err)
	363	fi->fib_flags &= ~RTNH_F_EXTERNAL;
	364	}
	365
	366	return err;
5e8d9049 SF	367	}
5e8d9049 SF	368	EXPORT_SYMBOL(netdev_switch_fib_ipv4_del);
8e05fd71 SF	369
	370	/**
	371	* netdev_switch_fib_ipv4_abort - Abort an IPv4 FIB operation
	372	*
	373	* @fi: route FIB info structure
	374	*/
	375	void netdev_switch_fib_ipv4_abort(struct fib_info *fi)
	376	{
	377	/* There was a problem installing this route to the offload
	378	* device. For now, until we come up with more refined
	379	* policy handling, abruptly end IPv4 fib offloading for
	380	* for entire net by flushing offload device(s) of all
	381	* IPv4 routes, and mark IPv4 fib offloading broken from
	382	* this point forward.
	383	*/
	384
	385	fib_flush_external(fi->fib_net);
	386	fi->fib_net->ipv4.fib_offload_disabled = true;
	387	}
	388	EXPORT_SYMBOL(netdev_switch_fib_ipv4_abort);