[linux-block.git] / drivers / net / ifb.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* drivers/net/ifb.c:

	The purpose of this driver is to provide a device that allows
	for sharing of resources:

	1) qdiscs/policies that are per device as opposed to system wide.
	ifb allows for a device which can be redirected to thus providing
	an impression of sharing.

	2) Allows for queueing incoming traffic for shaping instead of
	dropping.

	The original concept is based on what is known as the IMQ
	driver initially written by Martin Devera, later rewritten
	by Patrick McHardy and then maintained by Andre Correa.

	You need the tc action  mirror or redirect to feed this device
       	packets.


  	Authors:	Jamal Hadi Salim (2005)

*/


#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <net/pkt_sched.h>
#include <net/net_namespace.h>

#define TX_Q_LIMIT    32
struct ifb_q_private {
	struct net_device	*dev;
	struct tasklet_struct   ifb_tasklet;
	int			tasklet_pending;
	int			txqnum;
	struct sk_buff_head     rq;
	u64			rx_packets;
	u64			rx_bytes;
	struct u64_stats_sync	rsync;

	struct u64_stats_sync	tsync;
	u64			tx_packets;
	u64			tx_bytes;
	struct sk_buff_head     tq;
} ____cacheline_aligned_in_smp;

struct ifb_dev_private {
	struct ifb_q_private *tx_private;
};

static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev);
static int ifb_open(struct net_device *dev);
static int ifb_close(struct net_device *dev);

static void ifb_ri_tasklet(struct tasklet_struct *t)
{
	struct ifb_q_private *txp = from_tasklet(txp, t, ifb_tasklet);
	struct netdev_queue *txq;
	struct sk_buff *skb;

	txq = netdev_get_tx_queue(txp->dev, txp->txqnum);
	skb = skb_peek(&txp->tq);
	if (!skb) {
		if (!__netif_tx_trylock(txq))
			goto resched;
		skb_queue_splice_tail_init(&txp->rq, &txp->tq);
		__netif_tx_unlock(txq);
	}

	while ((skb = __skb_dequeue(&txp->tq)) != NULL) {
		skb->redirected = 0;
		skb->tc_skip_classify = 1;

		u64_stats_update_begin(&txp->tsync);
		txp->tx_packets++;
		txp->tx_bytes += skb->len;
		u64_stats_update_end(&txp->tsync);

		rcu_read_lock();
		skb->dev = dev_get_by_index_rcu(dev_net(txp->dev), skb->skb_iif);
		if (!skb->dev) {
			rcu_read_unlock();
			dev_kfree_skb(skb);
			txp->dev->stats.tx_dropped++;
			if (skb_queue_len(&txp->tq) != 0)
				goto resched;
			break;
		}
		rcu_read_unlock();
		skb->skb_iif = txp->dev->ifindex;

		if (!skb->from_ingress) {
			dev_queue_xmit(skb);
		} else {
			skb_pull_rcsum(skb, skb->mac_len);
			netif_receive_skb(skb);
		}
	}

	if (__netif_tx_trylock(txq)) {
		skb = skb_peek(&txp->rq);
		if (!skb) {
			txp->tasklet_pending = 0;
			if (netif_tx_queue_stopped(txq))
				netif_tx_wake_queue(txq);
		} else {
			__netif_tx_unlock(txq);
			goto resched;
		}
		__netif_tx_unlock(txq);
	} else {
resched:
		txp->tasklet_pending = 1;
		tasklet_schedule(&txp->ifb_tasklet);
	}

}

static void ifb_stats64(struct net_device *dev,
			struct rtnl_link_stats64 *stats)
{
	struct ifb_dev_private *dp = netdev_priv(dev);
	struct ifb_q_private *txp = dp->tx_private;
	unsigned int start;
	u64 packets, bytes;
	int i;

	for (i = 0; i < dev->num_tx_queues; i++,txp++) {
		do {
			start = u64_stats_fetch_begin_irq(&txp->rsync);
			packets = txp->rx_packets;
			bytes = txp->rx_bytes;
		} while (u64_stats_fetch_retry_irq(&txp->rsync, start));
		stats->rx_packets += packets;
		stats->rx_bytes += bytes;

		do {
			start = u64_stats_fetch_begin_irq(&txp->tsync);
			packets = txp->tx_packets;
			bytes = txp->tx_bytes;
		} while (u64_stats_fetch_retry_irq(&txp->tsync, start));
		stats->tx_packets += packets;
		stats->tx_bytes += bytes;
	}
	stats->rx_dropped = dev->stats.rx_dropped;
	stats->tx_dropped = dev->stats.tx_dropped;
}

static int ifb_dev_init(struct net_device *dev)
{
	struct ifb_dev_private *dp = netdev_priv(dev);
	struct ifb_q_private *txp;
	int i;

	txp = kcalloc(dev->num_tx_queues, sizeof(*txp), GFP_KERNEL);
	if (!txp)
		return -ENOMEM;
	dp->tx_private = txp;
	for (i = 0; i < dev->num_tx_queues; i++,txp++) {
		txp->txqnum = i;
		txp->dev = dev;
		__skb_queue_head_init(&txp->rq);
		__skb_queue_head_init(&txp->tq);
		u64_stats_init(&txp->rsync);
		u64_stats_init(&txp->tsync);
		tasklet_setup(&txp->ifb_tasklet, ifb_ri_tasklet);
		netif_tx_start_queue(netdev_get_tx_queue(dev, i));
	}
	return 0;
}

static const struct net_device_ops ifb_netdev_ops = {
	.ndo_open	= ifb_open,
	.ndo_stop	= ifb_close,
	.ndo_get_stats64 = ifb_stats64,
	.ndo_start_xmit	= ifb_xmit,
	.ndo_validate_addr = eth_validate_addr,
	.ndo_init	= ifb_dev_init,
};

#define IFB_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG  | NETIF_F_FRAGLIST	| \
		      NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL	| \
		      NETIF_F_HIGHDMA | NETIF_F_HW_VLAN_CTAG_TX		| \
		      NETIF_F_HW_VLAN_STAG_TX)

static void ifb_dev_free(struct net_device *dev)
{
	struct ifb_dev_private *dp = netdev_priv(dev);
	struct ifb_q_private *txp = dp->tx_private;
	int i;

	for (i = 0; i < dev->num_tx_queues; i++,txp++) {
		tasklet_kill(&txp->ifb_tasklet);
		__skb_queue_purge(&txp->rq);
		__skb_queue_purge(&txp->tq);
	}
	kfree(dp->tx_private);
}

static void ifb_setup(struct net_device *dev)
{
	/* Initialize the device structure. */
	dev->netdev_ops = &ifb_netdev_ops;

	/* Fill in device structure with ethernet-generic values. */
	ether_setup(dev);
	dev->tx_queue_len = TX_Q_LIMIT;

	dev->features |= IFB_FEATURES;
	dev->hw_features |= dev->features;
	dev->hw_enc_features |= dev->features;
	dev->vlan_features |= IFB_FEATURES & ~(NETIF_F_HW_VLAN_CTAG_TX |
					       NETIF_F_HW_VLAN_STAG_TX);

	dev->flags |= IFF_NOARP;
	dev->flags &= ~IFF_MULTICAST;
	dev->priv_flags &= ~IFF_TX_SKB_SHARING;
	netif_keep_dst(dev);
	eth_hw_addr_random(dev);
	dev->needs_free_netdev = true;
	dev->priv_destructor = ifb_dev_free;

	dev->min_mtu = 0;
	dev->max_mtu = 0;
}

static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct ifb_dev_private *dp = netdev_priv(dev);
	struct ifb_q_private *txp = dp->tx_private + skb_get_queue_mapping(skb);

	u64_stats_update_begin(&txp->rsync);
	txp->rx_packets++;
	txp->rx_bytes += skb->len;
	u64_stats_update_end(&txp->rsync);

	if (!skb->redirected || !skb->skb_iif) {
		dev_kfree_skb(skb);
		dev->stats.rx_dropped++;
		return NETDEV_TX_OK;
	}

	if (skb_queue_len(&txp->rq) >= dev->tx_queue_len)
		netif_tx_stop_queue(netdev_get_tx_queue(dev, txp->txqnum));

	__skb_queue_tail(&txp->rq, skb);
	if (!txp->tasklet_pending) {
		txp->tasklet_pending = 1;
		tasklet_schedule(&txp->ifb_tasklet);
	}

	return NETDEV_TX_OK;
}

static int ifb_close(struct net_device *dev)
{
	netif_tx_stop_all_queues(dev);
	return 0;
}

static int ifb_open(struct net_device *dev)
{
	netif_tx_start_all_queues(dev);
	return 0;
}

static int ifb_validate(struct nlattr *tb[], struct nlattr *data[],
			struct netlink_ext_ack *extack)
{
	if (tb[IFLA_ADDRESS]) {
		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
			return -EINVAL;
		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
			return -EADDRNOTAVAIL;
	}
	return 0;
}

static struct rtnl_link_ops ifb_link_ops __read_mostly = {
	.kind		= "ifb",
	.priv_size	= sizeof(struct ifb_dev_private),
	.setup		= ifb_setup,
	.validate	= ifb_validate,
};

/* Number of ifb devices to be set up by this module.
 * Note that these legacy devices have one queue.
 * Prefer something like : ip link add ifb10 numtxqueues 8 type ifb
 */
static int numifbs = 2;
module_param(numifbs, int, 0);
MODULE_PARM_DESC(numifbs, "Number of ifb devices");

static int __init ifb_init_one(int index)
{
	struct net_device *dev_ifb;
	int err;

	dev_ifb = alloc_netdev(sizeof(struct ifb_dev_private), "ifb%d",
			       NET_NAME_UNKNOWN, ifb_setup);

	if (!dev_ifb)
		return -ENOMEM;

	dev_ifb->rtnl_link_ops = &ifb_link_ops;
	err = register_netdevice(dev_ifb);
	if (err < 0)
		goto err;

	return 0;

err:
	free_netdev(dev_ifb);
	return err;
}

static int __init ifb_init_module(void)
{
	int i, err;

	down_write(&pernet_ops_rwsem);
	rtnl_lock();
	err = __rtnl_link_register(&ifb_link_ops);
	if (err < 0)
		goto out;

	for (i = 0; i < numifbs && !err; i++) {
		err = ifb_init_one(i);
		cond_resched();
	}
	if (err)
		__rtnl_link_unregister(&ifb_link_ops);

out:
	rtnl_unlock();
	up_write(&pernet_ops_rwsem);

	return err;
}

static void __exit ifb_cleanup_module(void)
{
	rtnl_link_unregister(&ifb_link_ops);
}

module_init(ifb_init_module);
module_exit(ifb_cleanup_module);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jamal Hadi Salim");
MODULE_ALIAS_RTNL_LINK("ifb");
Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0-or-later
	2	/* drivers/net/ifb.c:
	3
	4	The purpose of this driver is to provide a device that allows
	5	for sharing of resources:
	6
	7	1) qdiscs/policies that are per device as opposed to system wide.
	8	ifb allows for a device which can be redirected to thus providing
	9	an impression of sharing.
	10
	11	2) Allows for queueing incoming traffic for shaping instead of
	12	dropping.
	13
	14	The original concept is based on what is known as the IMQ
	15	driver initially written by Martin Devera, later rewritten
	16	by Patrick McHardy and then maintained by Andre Correa.
	17
	18	You need the tc action mirror or redirect to feed this device
	19	packets.
	20
	21
	22	Authors: Jamal Hadi Salim (2005)
	23
	24	*/
	25
	26
	27	#include <linux/module.h>
	28	#include <linux/kernel.h>
	29	#include <linux/netdevice.h>
	30	#include <linux/etherdevice.h>
	31	#include <linux/init.h>
	32	#include <linux/interrupt.h>
	33	#include <linux/moduleparam.h>
	34	#include <net/pkt_sched.h>
	35	#include <net/net_namespace.h>
	36
	37	#define TX_Q_LIMIT 32
	38	struct ifb_q_private {
	39	struct net_device *dev;
	40	struct tasklet_struct ifb_tasklet;
	41	int tasklet_pending;
	42	int txqnum;
	43	struct sk_buff_head rq;
	44	u64 rx_packets;
	45	u64 rx_bytes;
	46	struct u64_stats_sync rsync;
	47
	48	struct u64_stats_sync tsync;
	49	u64 tx_packets;
	50	u64 tx_bytes;
	51	struct sk_buff_head tq;
	52	} ____cacheline_aligned_in_smp;
	53
	54	struct ifb_dev_private {
	55	struct ifb_q_private *tx_private;
	56	};
	57
	58	static netdev_tx_t ifb_xmit(struct sk_buff skb, struct net_device dev);
	59	static int ifb_open(struct net_device *dev);
	60	static int ifb_close(struct net_device *dev);
	61
	62	static void ifb_ri_tasklet(struct tasklet_struct *t)
	63	{
	64	struct ifb_q_private *txp = from_tasklet(txp, t, ifb_tasklet);
	65	struct netdev_queue *txq;
	66	struct sk_buff *skb;
	67
	68	txq = netdev_get_tx_queue(txp->dev, txp->txqnum);
	69	skb = skb_peek(&txp->tq);
	70	if (!skb) {
	71	if (!__netif_tx_trylock(txq))
	72	goto resched;
	73	skb_queue_splice_tail_init(&txp->rq, &txp->tq);
	74	__netif_tx_unlock(txq);
	75	}
	76
	77	while ((skb = __skb_dequeue(&txp->tq)) != NULL) {
	78	skb->redirected = 0;
	79	skb->tc_skip_classify = 1;
	80
	81	u64_stats_update_begin(&txp->tsync);
	82	txp->tx_packets++;
	83	txp->tx_bytes += skb->len;
	84	u64_stats_update_end(&txp->tsync);
	85
	86	rcu_read_lock();
	87	skb->dev = dev_get_by_index_rcu(dev_net(txp->dev), skb->skb_iif);
	88	if (!skb->dev) {
	89	rcu_read_unlock();
	90	dev_kfree_skb(skb);
	91	txp->dev->stats.tx_dropped++;
	92	if (skb_queue_len(&txp->tq) != 0)
	93	goto resched;
	94	break;
	95	}
	96	rcu_read_unlock();
	97	skb->skb_iif = txp->dev->ifindex;
	98
	99	if (!skb->from_ingress) {
	100	dev_queue_xmit(skb);
	101	} else {
	102	skb_pull_rcsum(skb, skb->mac_len);
	103	netif_receive_skb(skb);
	104	}
	105	}
	106
	107	if (__netif_tx_trylock(txq)) {
	108	skb = skb_peek(&txp->rq);
	109	if (!skb) {
	110	txp->tasklet_pending = 0;
	111	if (netif_tx_queue_stopped(txq))
	112	netif_tx_wake_queue(txq);
	113	} else {
	114	__netif_tx_unlock(txq);
	115	goto resched;
	116	}
	117	__netif_tx_unlock(txq);
	118	} else {
	119	resched:
	120	txp->tasklet_pending = 1;
	121	tasklet_schedule(&txp->ifb_tasklet);
	122	}
	123
	124	}
	125
	126	static void ifb_stats64(struct net_device *dev,
	127	struct rtnl_link_stats64 *stats)
	128	{
	129	struct ifb_dev_private *dp = netdev_priv(dev);
	130	struct ifb_q_private *txp = dp->tx_private;
	131	unsigned int start;
	132	u64 packets, bytes;
	133	int i;
	134
	135	for (i = 0; i < dev->num_tx_queues; i++,txp++) {
	136	do {
	137	start = u64_stats_fetch_begin_irq(&txp->rsync);
	138	packets = txp->rx_packets;
	139	bytes = txp->rx_bytes;
	140	} while (u64_stats_fetch_retry_irq(&txp->rsync, start));
	141	stats->rx_packets += packets;
	142	stats->rx_bytes += bytes;
	143
	144	do {
	145	start = u64_stats_fetch_begin_irq(&txp->tsync);
	146	packets = txp->tx_packets;
	147	bytes = txp->tx_bytes;
	148	} while (u64_stats_fetch_retry_irq(&txp->tsync, start));
	149	stats->tx_packets += packets;
	150	stats->tx_bytes += bytes;
	151	}
	152	stats->rx_dropped = dev->stats.rx_dropped;
	153	stats->tx_dropped = dev->stats.tx_dropped;
	154	}
	155
	156	static int ifb_dev_init(struct net_device *dev)
	157	{
	158	struct ifb_dev_private *dp = netdev_priv(dev);
	159	struct ifb_q_private *txp;
	160	int i;
	161
	162	txp = kcalloc(dev->num_tx_queues, sizeof(*txp), GFP_KERNEL);
	163	if (!txp)
	164	return -ENOMEM;
	165	dp->tx_private = txp;
	166	for (i = 0; i < dev->num_tx_queues; i++,txp++) {
	167	txp->txqnum = i;
	168	txp->dev = dev;
	169	__skb_queue_head_init(&txp->rq);
	170	__skb_queue_head_init(&txp->tq);
	171	u64_stats_init(&txp->rsync);
	172	u64_stats_init(&txp->tsync);
	173	tasklet_setup(&txp->ifb_tasklet, ifb_ri_tasklet);
	174	netif_tx_start_queue(netdev_get_tx_queue(dev, i));
	175	}
	176	return 0;
	177	}
	178
	179	static const struct net_device_ops ifb_netdev_ops = {
	180	.ndo_open = ifb_open,
	181	.ndo_stop = ifb_close,
	182	.ndo_get_stats64 = ifb_stats64,
	183	.ndo_start_xmit = ifb_xmit,
	184	.ndo_validate_addr = eth_validate_addr,
	185	.ndo_init = ifb_dev_init,
	186	};
	187
	188	#define IFB_FEATURES (NETIF_F_HW_CSUM \| NETIF_F_SG \| NETIF_F_FRAGLIST \| \
	189	NETIF_F_GSO_SOFTWARE \| NETIF_F_GSO_ENCAP_ALL \| \
	190	NETIF_F_HIGHDMA \| NETIF_F_HW_VLAN_CTAG_TX \| \
	191	NETIF_F_HW_VLAN_STAG_TX)
	192
	193	static void ifb_dev_free(struct net_device *dev)
	194	{
	195	struct ifb_dev_private *dp = netdev_priv(dev);
	196	struct ifb_q_private *txp = dp->tx_private;
	197	int i;
	198
	199	for (i = 0; i < dev->num_tx_queues; i++,txp++) {
	200	tasklet_kill(&txp->ifb_tasklet);
	201	__skb_queue_purge(&txp->rq);
	202	__skb_queue_purge(&txp->tq);
	203	}
	204	kfree(dp->tx_private);
	205	}
	206
	207	static void ifb_setup(struct net_device *dev)
	208	{
	209	/* Initialize the device structure. */
	210	dev->netdev_ops = &ifb_netdev_ops;
	211
	212	/* Fill in device structure with ethernet-generic values. */
	213	ether_setup(dev);
	214	dev->tx_queue_len = TX_Q_LIMIT;
	215
	216	dev->features \|= IFB_FEATURES;
	217	dev->hw_features \|= dev->features;
	218	dev->hw_enc_features \|= dev->features;
	219	dev->vlan_features \|= IFB_FEATURES & ~(NETIF_F_HW_VLAN_CTAG_TX \|
	220	NETIF_F_HW_VLAN_STAG_TX);
	221
	222	dev->flags \|= IFF_NOARP;
	223	dev->flags &= ~IFF_MULTICAST;
	224	dev->priv_flags &= ~IFF_TX_SKB_SHARING;
	225	netif_keep_dst(dev);
	226	eth_hw_addr_random(dev);
	227	dev->needs_free_netdev = true;
	228	dev->priv_destructor = ifb_dev_free;
	229
	230	dev->min_mtu = 0;
	231	dev->max_mtu = 0;
	232	}
	233
	234	static netdev_tx_t ifb_xmit(struct sk_buff skb, struct net_device dev)
	235	{
	236	struct ifb_dev_private *dp = netdev_priv(dev);
	237	struct ifb_q_private *txp = dp->tx_private + skb_get_queue_mapping(skb);
	238
	239	u64_stats_update_begin(&txp->rsync);
	240	txp->rx_packets++;
	241	txp->rx_bytes += skb->len;
	242	u64_stats_update_end(&txp->rsync);
	243
	244	if (!skb->redirected \|\| !skb->skb_iif) {
	245	dev_kfree_skb(skb);
	246	dev->stats.rx_dropped++;
	247	return NETDEV_TX_OK;
	248	}
	249
	250	if (skb_queue_len(&txp->rq) >= dev->tx_queue_len)
	251	netif_tx_stop_queue(netdev_get_tx_queue(dev, txp->txqnum));
	252
	253	__skb_queue_tail(&txp->rq, skb);
	254	if (!txp->tasklet_pending) {
	255	txp->tasklet_pending = 1;
	256	tasklet_schedule(&txp->ifb_tasklet);
	257	}
	258
	259	return NETDEV_TX_OK;
	260	}
	261
	262	static int ifb_close(struct net_device *dev)
	263	{
	264	netif_tx_stop_all_queues(dev);
	265	return 0;
	266	}
	267
	268	static int ifb_open(struct net_device *dev)
	269	{
	270	netif_tx_start_all_queues(dev);
	271	return 0;
	272	}
	273
	274	static int ifb_validate(struct nlattr tb[], struct nlattr data[],
	275	struct netlink_ext_ack *extack)
	276	{
	277	if (tb[IFLA_ADDRESS]) {
	278	if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
	279	return -EINVAL;
	280	if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
	281	return -EADDRNOTAVAIL;
	282	}
	283	return 0;
	284	}
	285
	286	static struct rtnl_link_ops ifb_link_ops __read_mostly = {
	287	.kind = "ifb",
	288	.priv_size = sizeof(struct ifb_dev_private),
	289	.setup = ifb_setup,
	290	.validate = ifb_validate,
	291	};
	292
	293	/* Number of ifb devices to be set up by this module.
	294	* Note that these legacy devices have one queue.
	295	* Prefer something like : ip link add ifb10 numtxqueues 8 type ifb
	296	*/
	297	static int numifbs = 2;
	298	module_param(numifbs, int, 0);
	299	MODULE_PARM_DESC(numifbs, "Number of ifb devices");
	300
	301	static int __init ifb_init_one(int index)
	302	{
	303	struct net_device *dev_ifb;
	304	int err;
	305
	306	dev_ifb = alloc_netdev(sizeof(struct ifb_dev_private), "ifb%d",
	307	NET_NAME_UNKNOWN, ifb_setup);
	308
	309	if (!dev_ifb)
	310	return -ENOMEM;
	311
	312	dev_ifb->rtnl_link_ops = &ifb_link_ops;
	313	err = register_netdevice(dev_ifb);
	314	if (err < 0)
	315	goto err;
	316
	317	return 0;
	318
	319	err:
	320	free_netdev(dev_ifb);
	321	return err;
	322	}
	323
	324	static int __init ifb_init_module(void)
	325	{
	326	int i, err;
	327
	328	down_write(&pernet_ops_rwsem);
	329	rtnl_lock();
	330	err = __rtnl_link_register(&ifb_link_ops);
	331	if (err < 0)
	332	goto out;
	333
	334	for (i = 0; i < numifbs && !err; i++) {
	335	err = ifb_init_one(i);
	336	cond_resched();
	337	}
	338	if (err)
	339	__rtnl_link_unregister(&ifb_link_ops);
	340
	341	out:
	342	rtnl_unlock();
	343	up_write(&pernet_ops_rwsem);
	344
	345	return err;
	346	}
	347
	348	static void __exit ifb_cleanup_module(void)
	349	{
	350	rtnl_link_unregister(&ifb_link_ops);
	351	}
	352
	353	module_init(ifb_init_module);
	354	module_exit(ifb_cleanup_module);
	355	MODULE_LICENSE("GPL");
	356	MODULE_AUTHOR("Jamal Hadi Salim");
	357	MODULE_ALIAS_RTNL_LINK("ifb");