2 * NET3: Fibre Channel device handling subroutines
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Vineet Abraham <vma@iol.unh.edu>
13 #include <linux/uaccess.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
18 #include <linux/socket.h>
20 #include <linux/inet.h>
21 #include <linux/netdevice.h>
22 #include <linux/fcdevice.h>
23 #include <linux/skbuff.h>
24 #include <linux/errno.h>
25 #include <linux/timer.h>
26 #include <linux/net.h>
27 #include <linux/proc_fs.h>
28 #include <linux/init.h>
29 #include <linux/export.h>
33 * Put the headers on a Fibre Channel packet.
36 static int fc_header(struct sk_buff *skb, struct net_device *dev,
38 const void *daddr, const void *saddr, unsigned int len)
44 * Add the 802.2 SNAP header if IP as the IPv4 code calls
45 * dev->hard_header directly.
47 if (type == ETH_P_IP || type == ETH_P_ARP)
51 hdr_len = sizeof(struct fch_hdr) + sizeof(struct fcllc);
52 fch = skb_push(skb, hdr_len);
53 fcllc = (struct fcllc *)(fch+1);
54 fcllc->dsap = fcllc->ssap = EXTENDED_SAP;
56 fcllc->protid[0] = fcllc->protid[1] = fcllc->protid[2] = 0x00;
57 fcllc->ethertype = htons(type);
61 hdr_len = sizeof(struct fch_hdr);
62 fch = skb_push(skb, hdr_len);
66 memcpy(fch->saddr,saddr,dev->addr_len);
68 memcpy(fch->saddr,dev->dev_addr,dev->addr_len);
72 memcpy(fch->daddr,daddr,dev->addr_len);
78 static const struct header_ops fc_header_ops = {
82 static void fc_setup(struct net_device *dev)
84 dev->header_ops = &fc_header_ops;
85 dev->type = ARPHRD_IEEE802;
86 dev->hard_header_len = FC_HLEN;
88 dev->addr_len = FC_ALEN;
89 dev->tx_queue_len = 100; /* Long queues on fc */
90 dev->flags = IFF_BROADCAST;
92 memset(dev->broadcast, 0xFF, FC_ALEN);
96 * alloc_fcdev - Register fibre channel device
97 * @sizeof_priv: Size of additional driver-private structure to be allocated
98 * for this fibre channel device
100 * Fill in the fields of the device structure with fibre channel-generic values.
102 * Constructs a new net device, complete with a private data area of
103 * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
104 * this private data area.
106 struct net_device *alloc_fcdev(int sizeof_priv)
108 return alloc_netdev(sizeof_priv, "fc%d", NET_NAME_UNKNOWN, fc_setup);
110 EXPORT_SYMBOL(alloc_fcdev);