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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/net/802/hippi.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/net/802/hippi.c')
-rw-r--r-- | kernel/net/802/hippi.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/kernel/net/802/hippi.c b/kernel/net/802/hippi.c new file mode 100644 index 000000000..ade1a52cd --- /dev/null +++ b/kernel/net/802/hippi.c @@ -0,0 +1,207 @@ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * HIPPI-type device handling. + * + * Version: @(#)hippi.c 1.0.0 05/29/97 + * + * Authors: Ross Biro + * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> + * Mark Evans, <evansmp@uhura.aston.ac.uk> + * Florian La Roche, <rzsfl@rz.uni-sb.de> + * Alan Cox, <gw4pts@gw4pts.ampr.org> + * Jes Sorensen, <Jes.Sorensen@cern.ch> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/module.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/hippidevice.h> +#include <linux/skbuff.h> +#include <linux/errno.h> +#include <net/arp.h> +#include <net/sock.h> +#include <asm/uaccess.h> + +/* + * Create the HIPPI MAC header for an arbitrary protocol layer + * + * saddr=NULL means use device source address + * daddr=NULL means leave destination address (eg unresolved arp) + */ + +static int hippi_header(struct sk_buff *skb, struct net_device *dev, + unsigned short type, + const void *daddr, const void *saddr, unsigned int len) +{ + struct hippi_hdr *hip = (struct hippi_hdr *)skb_push(skb, HIPPI_HLEN); + struct hippi_cb *hcb = (struct hippi_cb *) skb->cb; + + if (!len){ + len = skb->len - HIPPI_HLEN; + printk("hippi_header(): length not supplied\n"); + } + + /* + * Due to the stupidity of the little endian byte-order we + * have to set the fp field this way. + */ + hip->fp.fixed = htonl(0x04800018); + hip->fp.d2_size = htonl(len + 8); + hip->le.fc = 0; + hip->le.double_wide = 0; /* only HIPPI 800 for the time being */ + hip->le.message_type = 0; /* Data PDU */ + + hip->le.dest_addr_type = 2; /* 12 bit SC address */ + hip->le.src_addr_type = 2; /* 12 bit SC address */ + + memcpy(hip->le.src_switch_addr, dev->dev_addr + 3, 3); + memset(&hip->le.reserved, 0, 16); + + hip->snap.dsap = HIPPI_EXTENDED_SAP; + hip->snap.ssap = HIPPI_EXTENDED_SAP; + hip->snap.ctrl = HIPPI_UI_CMD; + hip->snap.oui[0] = 0x00; + hip->snap.oui[1] = 0x00; + hip->snap.oui[2] = 0x00; + hip->snap.ethertype = htons(type); + + if (daddr) + { + memcpy(hip->le.dest_switch_addr, daddr + 3, 3); + memcpy(&hcb->ifield, daddr + 2, 4); + return HIPPI_HLEN; + } + hcb->ifield = 0; + return -((int)HIPPI_HLEN); +} + + +/* + * Determine the packet's protocol ID. + */ + +__be16 hippi_type_trans(struct sk_buff *skb, struct net_device *dev) +{ + struct hippi_hdr *hip; + + /* + * This is actually wrong ... question is if we really should + * set the raw address here. + */ + skb->dev = dev; + skb_reset_mac_header(skb); + hip = (struct hippi_hdr *)skb_mac_header(skb); + skb_pull(skb, HIPPI_HLEN); + + /* + * No fancy promisc stuff here now. + */ + + return hip->snap.ethertype; +} + +EXPORT_SYMBOL(hippi_type_trans); + +int hippi_change_mtu(struct net_device *dev, int new_mtu) +{ + /* + * HIPPI's got these nice large MTUs. + */ + if ((new_mtu < 68) || (new_mtu > 65280)) + return -EINVAL; + dev->mtu = new_mtu; + return 0; +} +EXPORT_SYMBOL(hippi_change_mtu); + +/* + * For HIPPI we will actually use the lower 4 bytes of the hardware + * address as the I-FIELD rather than the actual hardware address. + */ +int hippi_mac_addr(struct net_device *dev, void *p) +{ + struct sockaddr *addr = p; + if (netif_running(dev)) + return -EBUSY; + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + return 0; +} +EXPORT_SYMBOL(hippi_mac_addr); + +int hippi_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p) +{ + /* Never send broadcast/multicast ARP messages */ + NEIGH_VAR_INIT(p, MCAST_PROBES, 0); + + /* In IPv6 unicast probes are valid even on NBMA, + * because they are encapsulated in normal IPv6 protocol. + * Should be a generic flag. + */ + if (p->tbl->family != AF_INET6) + NEIGH_VAR_INIT(p, UCAST_PROBES, 0); + return 0; +} +EXPORT_SYMBOL(hippi_neigh_setup_dev); + +static const struct header_ops hippi_header_ops = { + .create = hippi_header, +}; + + +static void hippi_setup(struct net_device *dev) +{ + dev->header_ops = &hippi_header_ops; + + /* + * We don't support HIPPI `ARP' for the time being, and probably + * never will unless someone else implements it. However we + * still need a fake ARPHRD to make ifconfig and friends play ball. + */ + dev->type = ARPHRD_HIPPI; + dev->hard_header_len = HIPPI_HLEN; + dev->mtu = 65280; + dev->addr_len = HIPPI_ALEN; + dev->tx_queue_len = 25 /* 5 */; + memset(dev->broadcast, 0xFF, HIPPI_ALEN); + + + /* + * HIPPI doesn't support broadcast+multicast and we only use + * static ARP tables. ARP is disabled by hippi_neigh_setup_dev. + */ + dev->flags = 0; +} + +/** + * alloc_hippi_dev - Register HIPPI device + * @sizeof_priv: Size of additional driver-private structure to be allocated + * for this HIPPI device + * + * Fill in the fields of the device structure with HIPPI-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_hippi_dev(int sizeof_priv) +{ + return alloc_netdev(sizeof_priv, "hip%d", NET_NAME_UNKNOWN, + hippi_setup); +} + +EXPORT_SYMBOL(alloc_hippi_dev); |