1 /*
2 * This file provides /sys/class/ieee80211/<wiphy name>/
3 * and some default attributes.
4 *
5 * Copyright 2005-2006 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
7 *
8 * This file is GPLv2 as found in COPYING.
9 */
10
11 #include <linux/device.h>
12 #include <linux/module.h>
13 #include <linux/netdevice.h>
14 #include <linux/nl80211.h>
15 #include <linux/rtnetlink.h>
16 #include <net/cfg80211.h>
17 #include "sysfs.h"
18 #include "core.h"
19
dev_to_rdev(struct device * dev)20 static inline struct cfg80211_registered_device *dev_to_rdev(
21 struct device *dev)
22 {
23 return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
24 }
25
26 #define SHOW_FMT(name, fmt, member) \
27 static ssize_t name ## _show(struct device *dev, \
28 struct device_attribute *attr, \
29 char *buf) \
30 { \
31 return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member); \
32 }
33
34 SHOW_FMT(index, "%d", wiphy_idx);
35 SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
36 SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
37
name_show(struct device * dev,struct device_attribute * attr,char * buf)38 static ssize_t name_show(struct device *dev,
39 struct device_attribute *attr,
40 char *buf) {
41 struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
42 return sprintf(buf, "%s\n", dev_name(&wiphy->dev));
43 }
44
45
addresses_show(struct device * dev,struct device_attribute * attr,char * buf)46 static ssize_t addresses_show(struct device *dev,
47 struct device_attribute *attr,
48 char *buf)
49 {
50 struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
51 char *start = buf;
52 int i;
53
54 if (!wiphy->addresses)
55 return sprintf(buf, "%pM\n", wiphy->perm_addr);
56
57 for (i = 0; i < wiphy->n_addresses; i++)
58 buf += sprintf(buf, "%pM\n", &wiphy->addresses[i].addr);
59
60 return buf - start;
61 }
62
63 static struct device_attribute ieee80211_dev_attrs[] = {
64 __ATTR_RO(index),
65 __ATTR_RO(macaddress),
66 __ATTR_RO(address_mask),
67 __ATTR_RO(addresses),
68 __ATTR_RO(name),
69 {}
70 };
71
wiphy_dev_release(struct device * dev)72 static void wiphy_dev_release(struct device *dev)
73 {
74 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
75
76 cfg80211_dev_free(rdev);
77 }
78
79 #ifdef CONFIG_HOTPLUG
wiphy_uevent(struct device * dev,struct kobj_uevent_env * env)80 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
81 {
82 /* TODO, we probably need stuff here */
83 return 0;
84 }
85 #endif
86
wiphy_suspend(struct device * dev,pm_message_t state)87 static int wiphy_suspend(struct device *dev, pm_message_t state)
88 {
89 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
90 int ret = 0;
91
92 rdev->suspend_at = get_seconds();
93
94 if (rdev->ops->suspend) {
95 rtnl_lock();
96 ret = rdev->ops->suspend(&rdev->wiphy);
97 rtnl_unlock();
98 }
99
100 return ret;
101 }
102
wiphy_resume(struct device * dev)103 static int wiphy_resume(struct device *dev)
104 {
105 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
106 int ret = 0;
107
108 /* Age scan results with time spent in suspend */
109 spin_lock_bh(&rdev->bss_lock);
110 cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
111 spin_unlock_bh(&rdev->bss_lock);
112
113 if (rdev->ops->resume) {
114 rtnl_lock();
115 ret = rdev->ops->resume(&rdev->wiphy);
116 rtnl_unlock();
117 }
118
119 return ret;
120 }
121
wiphy_namespace(struct device * d)122 static const void *wiphy_namespace(struct device *d)
123 {
124 struct wiphy *wiphy = container_of(d, struct wiphy, dev);
125
126 return wiphy_net(wiphy);
127 }
128
129 struct class ieee80211_class = {
130 .name = "ieee80211",
131 .owner = THIS_MODULE,
132 .dev_release = wiphy_dev_release,
133 .dev_attrs = ieee80211_dev_attrs,
134 #ifdef CONFIG_HOTPLUG
135 .dev_uevent = wiphy_uevent,
136 #endif
137 .suspend = wiphy_suspend,
138 .resume = wiphy_resume,
139 .ns_type = &net_ns_type_operations,
140 .namespace = wiphy_namespace,
141 };
142
wiphy_sysfs_init(void)143 int wiphy_sysfs_init(void)
144 {
145 return class_register(&ieee80211_class);
146 }
147
wiphy_sysfs_exit(void)148 void wiphy_sysfs_exit(void)
149 {
150 class_unregister(&ieee80211_class);
151 }
152