^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * NET3: Fibre Channel device handling subroutines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Vineet Abraham <vma@iol.unh.edu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * v 1.0 03/22/99
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/inet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/fcdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <net/arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * Put the headers on a Fibre Channel packet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int fc_header(struct sk_buff *skb, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned short type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) const void *daddr, const void *saddr, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct fch_hdr *fch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int hdr_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * Add the 802.2 SNAP header if IP as the IPv4 code calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * dev->hard_header directly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (type == ETH_P_IP || type == ETH_P_ARP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct fcllc *fcllc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) hdr_len = sizeof(struct fch_hdr) + sizeof(struct fcllc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) fch = skb_push(skb, hdr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) fcllc = (struct fcllc *)(fch+1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) fcllc->dsap = fcllc->ssap = EXTENDED_SAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) fcllc->llc = UI_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) fcllc->protid[0] = fcllc->protid[1] = fcllc->protid[2] = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) fcllc->ethertype = htons(type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) hdr_len = sizeof(struct fch_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) fch = skb_push(skb, hdr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if(saddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) memcpy(fch->saddr,saddr,dev->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) memcpy(fch->saddr,dev->dev_addr,dev->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if(daddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) memcpy(fch->daddr,daddr,dev->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return hdr_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return -hdr_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static const struct header_ops fc_header_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .create = fc_header,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static void fc_setup(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) dev->header_ops = &fc_header_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) dev->type = ARPHRD_IEEE802;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) dev->hard_header_len = FC_HLEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) dev->mtu = 2024;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) dev->addr_len = FC_ALEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) dev->tx_queue_len = 100; /* Long queues on fc */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) dev->flags = IFF_BROADCAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) memset(dev->broadcast, 0xFF, FC_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * alloc_fcdev - Register fibre channel device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * @sizeof_priv: Size of additional driver-private structure to be allocated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * for this fibre channel device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * Fill in the fields of the device structure with fibre channel-generic values.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * Constructs a new net device, complete with a private data area of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * this private data area.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct net_device *alloc_fcdev(int sizeof_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return alloc_netdev(sizeof_priv, "fc%d", NET_NAME_UNKNOWN, fc_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) EXPORT_SYMBOL(alloc_fcdev);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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