[linux.git] / net / 802 / fc.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * NET3:	Fibre Channel device handling subroutines
 *
 *		Vineet Abraham <[email protected]>
 *		v 1.0 03/22/99
 */

#include <linux/uaccess.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/fcdevice.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <linux/timer.h>
#include <linux/net.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/export.h>
#include <net/arp.h>

/*
 *	Put the headers on a Fibre Channel packet.
 */

static int fc_header(struct sk_buff *skb, struct net_device *dev,
		     unsigned short type,
		     const void *daddr, const void *saddr, unsigned int len)
{
	struct fch_hdr *fch;
	int hdr_len;

	/*
	 * Add the 802.2 SNAP header if IP as the IPv4 code calls
	 * dev->hard_header directly.
	 */
	if (type == ETH_P_IP || type == ETH_P_ARP)
	{
		struct fcllc *fcllc;

		hdr_len = sizeof(struct fch_hdr) + sizeof(struct fcllc);
		fch = skb_push(skb, hdr_len);
		fcllc = (struct fcllc *)(fch+1);
		fcllc->dsap = fcllc->ssap = EXTENDED_SAP;
		fcllc->llc = UI_CMD;
		fcllc->protid[0] = fcllc->protid[1] = fcllc->protid[2] = 0x00;
		fcllc->ethertype = htons(type);
	}
	else
	{
		hdr_len = sizeof(struct fch_hdr);
		fch = skb_push(skb, hdr_len);
	}

	if(saddr)
		memcpy(fch->saddr,saddr,dev->addr_len);
	else
		memcpy(fch->saddr,dev->dev_addr,dev->addr_len);

	if(daddr)
	{
		memcpy(fch->daddr,daddr,dev->addr_len);
		return hdr_len;
	}
	return -hdr_len;
}

static const struct header_ops fc_header_ops = {
	.create	 = fc_header,
};

static void fc_setup(struct net_device *dev)
{
	dev->header_ops		= &fc_header_ops;
	dev->type		= ARPHRD_IEEE802;
	dev->hard_header_len	= FC_HLEN;
	dev->mtu		= 2024;
	dev->addr_len		= FC_ALEN;
	dev->tx_queue_len	= 100; /* Long queues on fc */
	dev->flags		= IFF_BROADCAST;

	memset(dev->broadcast, 0xFF, FC_ALEN);
}

/**
 * alloc_fcdev - Register fibre channel device
 * @sizeof_priv: Size of additional driver-private structure to be allocated
 *	for this fibre channel device
 *
 * Fill in the fields of the device structure with fibre channel-generic values.
 *
 * Constructs a new net device, complete with a private data area of
 * size @sizeof_priv.  A 32-byte (not bit) alignment is enforced for
 * this private data area.
 */
struct net_device *alloc_fcdev(int sizeof_priv)
{
	return alloc_netdev(sizeof_priv, "fc%d", NET_NAME_UNKNOWN, fc_setup);
}
EXPORT_SYMBOL(alloc_fcdev);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
1da177e4 LT	3	* NET3: Fibre Channel device handling subroutines
9afa0949	4	*
1da177e4 LT	5	* Vineet Abraham <[email protected]>
	6	* v 1.0 03/22/99
	7	*/
	8
7c0f6ba6	9	#include <linux/uaccess.h>
1da177e4 LT	10	#include <linux/types.h>
1da177e4 LT	11	#include <linux/kernel.h>
1da177e4 LT	12	#include <linux/string.h>
	13	#include <linux/mm.h>
	14	#include <linux/socket.h>
	15	#include <linux/in.h>
	16	#include <linux/inet.h>
	17	#include <linux/netdevice.h>
	18	#include <linux/fcdevice.h>
	19	#include <linux/skbuff.h>
	20	#include <linux/errno.h>
	21	#include <linux/timer.h>
	22	#include <linux/net.h>
	23	#include <linux/proc_fs.h>
	24	#include <linux/init.h>
bc3b2d7f	25	#include <linux/export.h>
1da177e4 LT	26	#include <net/arp.h>
	27
	28	/*
9afa0949	29	* Put the headers on a Fibre Channel packet.
1da177e4	30	*/
9afa0949	31
1da177e4 LT	32	static int fc_header(struct sk_buff skb, struct net_device dev,
1da177e4 LT	33	unsigned short type,
95c96174	34	const void daddr, const void saddr, unsigned int len)
1da177e4 LT	35	{
	36	struct fch_hdr *fch;
	37	int hdr_len;
	38
9afa0949 YH	39	/*
9afa0949 YH	40	* Add the 802.2 SNAP header if IP as the IPv4 code calls
1da177e4 LT	41	* dev->hard_header directly.
	42	*/
	43	if (type == ETH_P_IP \|\| type == ETH_P_ARP)
	44	{
	45	struct fcllc *fcllc;
	46
	47	hdr_len = sizeof(struct fch_hdr) + sizeof(struct fcllc);
d58ff351	48	fch = skb_push(skb, hdr_len);
1da177e4 LT	49	fcllc = (struct fcllc *)(fch+1);
	50	fcllc->dsap = fcllc->ssap = EXTENDED_SAP;
	51	fcllc->llc = UI_CMD;
	52	fcllc->protid[0] = fcllc->protid[1] = fcllc->protid[2] = 0x00;
	53	fcllc->ethertype = htons(type);
	54	}
	55	else
	56	{
	57	hdr_len = sizeof(struct fch_hdr);
d58ff351	58	fch = skb_push(skb, hdr_len);
1da177e4 LT	59	}
	60
	61	if(saddr)
	62	memcpy(fch->saddr,saddr,dev->addr_len);
	63	else
	64	memcpy(fch->saddr,dev->dev_addr,dev->addr_len);
	65
9afa0949	66	if(daddr)
1da177e4 LT	67	{
1da177e4 LT	68	memcpy(fch->daddr,daddr,dev->addr_len);
a02cec21	69	return hdr_len;
1da177e4 LT	70	}
	71	return -hdr_len;
	72	}
9afa0949	73
3b04ddde SH	74	static const struct header_ops fc_header_ops = {
3b04ddde SH	75	.create = fc_header,
3b04ddde SH	76	};
3b04ddde SH	77
1da177e4 LT	78	static void fc_setup(struct net_device *dev)
1da177e4 LT	79	{
3b04ddde	80	dev->header_ops = &fc_header_ops;
1da177e4 LT	81	dev->type = ARPHRD_IEEE802;
	82	dev->hard_header_len = FC_HLEN;
	83	dev->mtu = 2024;
	84	dev->addr_len = FC_ALEN;
	85	dev->tx_queue_len = 100; /* Long queues on fc */
	86	dev->flags = IFF_BROADCAST;
	87
	88	memset(dev->broadcast, 0xFF, FC_ALEN);
	89	}
	90
	91	/**
	92	* alloc_fcdev - Register fibre channel device
	93	* @sizeof_priv: Size of additional driver-private structure to be allocated
	94	* for this fibre channel device
	95	*
	96	* Fill in the fields of the device structure with fibre channel-generic values.
	97	*
	98	* Constructs a new net device, complete with a private data area of
	99	* size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
	100	* this private data area.
	101	*/
	102	struct net_device *alloc_fcdev(int sizeof_priv)
	103	{
c835a677	104	return alloc_netdev(sizeof_priv, "fc%d", NET_NAME_UNKNOWN, fc_setup);
1da177e4 LT	105	}
1da177e4 LT	106	EXPORT_SYMBOL(alloc_fcdev);