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authorKrzysztof Halasa <khc@pm.waw.pl>2006-09-26 17:23:45 -0400
committerJeff Garzik <jeff@garzik.org>2006-09-26 17:40:24 -0400
commiteb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfb (patch)
tree1d910a9460b76fd85ed02e8b9131270e4977f6f7 /drivers/net/wan/hdlc_raw_eth.c
parentc226951b93f7cd7c3a10b17384535b617bd43fd0 (diff)
[PATCH] Modularize generic HDLC
This patch enables building of individual WAN protocol support routines (parts of generic HDLC) as separate modules. All protocol-private definitions are moved from hdlc.h file to protocol drivers. User-space interface and interface between generic HDLC and underlying low-level HDLC drivers are unchanged. Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/wan/hdlc_raw_eth.c')
-rw-r--r--drivers/net/wan/hdlc_raw_eth.c49
1 files changed, 40 insertions, 9 deletions
diff --git a/drivers/net/wan/hdlc_raw_eth.c b/drivers/net/wan/hdlc_raw_eth.c
index d1884987f94e..1a69a9aaa9b9 100644
--- a/drivers/net/wan/hdlc_raw_eth.c
+++ b/drivers/net/wan/hdlc_raw_eth.c
@@ -2,7 +2,7 @@
2 * Generic HDLC support routines for Linux 2 * Generic HDLC support routines for Linux
3 * HDLC Ethernet emulation support 3 * HDLC Ethernet emulation support
4 * 4 *
5 * Copyright (C) 2002-2003 Krzysztof Halasa <khc@pm.waw.pl> 5 * Copyright (C) 2002-2006 Krzysztof Halasa <khc@pm.waw.pl>
6 * 6 *
7 * This program is free software; you can redistribute it and/or modify it 7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License 8 * under the terms of version 2 of the GNU General Public License
@@ -25,6 +25,7 @@
25#include <linux/etherdevice.h> 25#include <linux/etherdevice.h>
26#include <linux/hdlc.h> 26#include <linux/hdlc.h>
27 27
28static int raw_eth_ioctl(struct net_device *dev, struct ifreq *ifr);
28 29
29static int eth_tx(struct sk_buff *skb, struct net_device *dev) 30static int eth_tx(struct sk_buff *skb, struct net_device *dev)
30{ 31{
@@ -44,7 +45,14 @@ static int eth_tx(struct sk_buff *skb, struct net_device *dev)
44} 45}
45 46
46 47
47int hdlc_raw_eth_ioctl(struct net_device *dev, struct ifreq *ifr) 48static struct hdlc_proto proto = {
49 .type_trans = eth_type_trans,
50 .ioctl = raw_eth_ioctl,
51 .module = THIS_MODULE,
52};
53
54
55static int raw_eth_ioctl(struct net_device *dev, struct ifreq *ifr)
48{ 56{
49 raw_hdlc_proto __user *raw_s = ifr->ifr_settings.ifs_ifsu.raw_hdlc; 57 raw_hdlc_proto __user *raw_s = ifr->ifr_settings.ifs_ifsu.raw_hdlc;
50 const size_t size = sizeof(raw_hdlc_proto); 58 const size_t size = sizeof(raw_hdlc_proto);
@@ -56,12 +64,14 @@ int hdlc_raw_eth_ioctl(struct net_device *dev, struct ifreq *ifr)
56 64
57 switch (ifr->ifr_settings.type) { 65 switch (ifr->ifr_settings.type) {
58 case IF_GET_PROTO: 66 case IF_GET_PROTO:
67 if (dev_to_hdlc(dev)->proto != &proto)
68 return -EINVAL;
59 ifr->ifr_settings.type = IF_PROTO_HDLC_ETH; 69 ifr->ifr_settings.type = IF_PROTO_HDLC_ETH;
60 if (ifr->ifr_settings.size < size) { 70 if (ifr->ifr_settings.size < size) {
61 ifr->ifr_settings.size = size; /* data size wanted */ 71 ifr->ifr_settings.size = size; /* data size wanted */
62 return -ENOBUFS; 72 return -ENOBUFS;
63 } 73 }
64 if (copy_to_user(raw_s, &hdlc->state.raw_hdlc.settings, size)) 74 if (copy_to_user(raw_s, hdlc->state, size))
65 return -EFAULT; 75 return -EFAULT;
66 return 0; 76 return 0;
67 77
@@ -86,12 +96,11 @@ int hdlc_raw_eth_ioctl(struct net_device *dev, struct ifreq *ifr)
86 if (result) 96 if (result)
87 return result; 97 return result;
88 98
89 hdlc_proto_detach(hdlc); 99 result = attach_hdlc_protocol(dev, &proto, NULL,
90 memcpy(&hdlc->state.raw_hdlc.settings, &new_settings, size); 100 sizeof(raw_hdlc_proto));
91 memset(&hdlc->proto, 0, sizeof(hdlc->proto)); 101 if (result)
92 102 return result;
93 hdlc->proto.type_trans = eth_type_trans; 103 memcpy(hdlc->state, &new_settings, size);
94 hdlc->proto.id = IF_PROTO_HDLC_ETH;
95 dev->hard_start_xmit = eth_tx; 104 dev->hard_start_xmit = eth_tx;
96 old_ch_mtu = dev->change_mtu; 105 old_ch_mtu = dev->change_mtu;
97 old_qlen = dev->tx_queue_len; 106 old_qlen = dev->tx_queue_len;
@@ -106,3 +115,25 @@ int hdlc_raw_eth_ioctl(struct net_device *dev, struct ifreq *ifr)
106 115
107 return -EINVAL; 116 return -EINVAL;
108} 117}
118
119
120static int __init mod_init(void)
121{
122 register_hdlc_protocol(&proto);
123 return 0;
124}
125
126
127
128static void __exit mod_exit(void)
129{
130 unregister_hdlc_protocol(&proto);
131}
132
133
134module_init(mod_init);
135module_exit(mod_exit);
136
137MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
138MODULE_DESCRIPTION("Ethernet encapsulation support for generic HDLC");
139MODULE_LICENSE("GPL v2");