ia64/linux-2.6.18-xen.hg

view net/rose/rose_dev.c @ 871:9cbcc9008446

xen/x86: don't initialize cpu_data[]'s apicid field on generic code

Afaict, this is not only redundant with the intialization done in
drivers/xen/core/smpboot.c, but actually results - at least for
secondary CPUs - in the Xen-specific value written to be later
overwritten with whatever the generic code determines (with no
guarantee that the two values are identical).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu May 14 10:09:15 2009 +0100 (2009-05-14)
parents 831230e53067
children
line source
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 */
9 #include <linux/module.h>
10 #include <linux/proc_fs.h>
11 #include <linux/kernel.h>
12 #include <linux/sched.h>
13 #include <linux/interrupt.h>
14 #include <linux/fs.h>
15 #include <linux/types.h>
16 #include <linux/sysctl.h>
17 #include <linux/string.h>
18 #include <linux/socket.h>
19 #include <linux/errno.h>
20 #include <linux/fcntl.h>
21 #include <linux/in.h>
22 #include <linux/if_ether.h>
24 #include <asm/system.h>
25 #include <asm/io.h>
27 #include <linux/inet.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/if_arp.h>
31 #include <linux/skbuff.h>
33 #include <net/ip.h>
34 #include <net/arp.h>
36 #include <net/ax25.h>
37 #include <net/rose.h>
39 static int rose_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
40 void *daddr, void *saddr, unsigned len)
41 {
42 unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
44 *buff++ = ROSE_GFI | ROSE_Q_BIT;
45 *buff++ = 0x00;
46 *buff++ = ROSE_DATA;
47 *buff++ = 0x7F;
48 *buff++ = AX25_P_IP;
50 if (daddr != NULL)
51 return 37;
53 return -37;
54 }
56 static int rose_rebuild_header(struct sk_buff *skb)
57 {
58 struct net_device *dev = skb->dev;
59 struct net_device_stats *stats = netdev_priv(dev);
60 unsigned char *bp = (unsigned char *)skb->data;
61 struct sk_buff *skbn;
62 unsigned int len;
64 #ifdef CONFIG_INET
65 if (arp_find(bp + 7, skb)) {
66 return 1;
67 }
69 if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
70 kfree_skb(skb);
71 return 1;
72 }
74 if (skb->sk != NULL)
75 skb_set_owner_w(skbn, skb->sk);
77 kfree_skb(skb);
79 len = skbn->len;
81 if (!rose_route_frame(skbn, NULL)) {
82 kfree_skb(skbn);
83 stats->tx_errors++;
84 return 1;
85 }
87 stats->tx_packets++;
88 stats->tx_bytes += len;
89 #endif
90 return 1;
91 }
93 static int rose_set_mac_address(struct net_device *dev, void *addr)
94 {
95 struct sockaddr *sa = addr;
97 rose_del_loopback_node((rose_address *)dev->dev_addr);
99 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
101 rose_add_loopback_node((rose_address *)dev->dev_addr);
103 return 0;
104 }
106 static int rose_open(struct net_device *dev)
107 {
108 netif_start_queue(dev);
109 rose_add_loopback_node((rose_address *)dev->dev_addr);
110 return 0;
111 }
113 static int rose_close(struct net_device *dev)
114 {
115 netif_stop_queue(dev);
116 rose_del_loopback_node((rose_address *)dev->dev_addr);
117 return 0;
118 }
120 static int rose_xmit(struct sk_buff *skb, struct net_device *dev)
121 {
122 struct net_device_stats *stats = netdev_priv(dev);
124 if (!netif_running(dev)) {
125 printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
126 return 1;
127 }
128 dev_kfree_skb(skb);
129 stats->tx_errors++;
130 return 0;
131 }
133 static struct net_device_stats *rose_get_stats(struct net_device *dev)
134 {
135 return netdev_priv(dev);
136 }
138 void rose_setup(struct net_device *dev)
139 {
140 dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
141 dev->hard_start_xmit = rose_xmit;
142 dev->open = rose_open;
143 dev->stop = rose_close;
145 dev->hard_header = rose_header;
146 dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
147 dev->addr_len = ROSE_ADDR_LEN;
148 dev->type = ARPHRD_ROSE;
149 dev->rebuild_header = rose_rebuild_header;
150 dev->set_mac_address = rose_set_mac_address;
152 /* New-style flags. */
153 dev->flags = IFF_NOARP;
154 dev->get_stats = rose_get_stats;
155 }