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106 lines
2.5 KiB
106 lines
2.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* NET3: Fibre Channel device handling subroutines |
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* |
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* Vineet Abraham <[email protected]> |
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* v 1.0 03/22/99 |
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*/ |
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#include <linux/uaccess.h> |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/string.h> |
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#include <linux/mm.h> |
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#include <linux/socket.h> |
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#include <linux/in.h> |
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#include <linux/inet.h> |
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#include <linux/netdevice.h> |
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#include <linux/fcdevice.h> |
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#include <linux/skbuff.h> |
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#include <linux/errno.h> |
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#include <linux/timer.h> |
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#include <linux/net.h> |
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#include <linux/proc_fs.h> |
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#include <linux/init.h> |
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#include <linux/export.h> |
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#include <net/arp.h> |
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/* |
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* Put the headers on a Fibre Channel packet. |
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*/ |
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static int fc_header(struct sk_buff *skb, struct net_device *dev, |
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unsigned short type, |
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const void *daddr, const void *saddr, unsigned int len) |
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{ |
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struct fch_hdr *fch; |
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int hdr_len; |
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/* |
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* Add the 802.2 SNAP header if IP as the IPv4 code calls |
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* dev->hard_header directly. |
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*/ |
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if (type == ETH_P_IP || type == ETH_P_ARP) |
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{ |
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struct fcllc *fcllc; |
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hdr_len = sizeof(struct fch_hdr) + sizeof(struct fcllc); |
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fch = skb_push(skb, hdr_len); |
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fcllc = (struct fcllc *)(fch+1); |
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fcllc->dsap = fcllc->ssap = EXTENDED_SAP; |
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fcllc->llc = UI_CMD; |
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fcllc->protid[0] = fcllc->protid[1] = fcllc->protid[2] = 0x00; |
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fcllc->ethertype = htons(type); |
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} |
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else |
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{ |
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hdr_len = sizeof(struct fch_hdr); |
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fch = skb_push(skb, hdr_len); |
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} |
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if(saddr) |
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memcpy(fch->saddr,saddr,dev->addr_len); |
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else |
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memcpy(fch->saddr,dev->dev_addr,dev->addr_len); |
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if(daddr) |
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{ |
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memcpy(fch->daddr,daddr,dev->addr_len); |
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return hdr_len; |
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} |
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return -hdr_len; |
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} |
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static const struct header_ops fc_header_ops = { |
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.create = fc_header, |
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}; |
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static void fc_setup(struct net_device *dev) |
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{ |
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dev->header_ops = &fc_header_ops; |
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dev->type = ARPHRD_IEEE802; |
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dev->hard_header_len = FC_HLEN; |
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dev->mtu = 2024; |
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dev->addr_len = FC_ALEN; |
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dev->tx_queue_len = 100; /* Long queues on fc */ |
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dev->flags = IFF_BROADCAST; |
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memset(dev->broadcast, 0xFF, FC_ALEN); |
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} |
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/** |
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* alloc_fcdev - Register fibre channel device |
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* @sizeof_priv: Size of additional driver-private structure to be allocated |
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* for this fibre channel device |
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* |
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* Fill in the fields of the device structure with fibre channel-generic values. |
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* |
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* Constructs a new net device, complete with a private data area of |
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* size @sizeof_priv. A 32-byte (not bit) alignment is enforced for |
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* this private data area. |
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*/ |
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struct net_device *alloc_fcdev(int sizeof_priv) |
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{ |
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return alloc_netdev(sizeof_priv, "fc%d", NET_NAME_UNKNOWN, fc_setup); |
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} |
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EXPORT_SYMBOL(alloc_fcdev);
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