1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * This file provides /sys/class/ieee80211/<wiphy name>/
4 * and some default attributes.
5 *
6 * Copyright 2005-2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
8 */
9
10 #include <linux/device.h>
11 #include <linux/module.h>
12 #include <linux/netdevice.h>
13 #include <linux/nl80211.h>
14 #include <linux/rtnetlink.h>
15 #include <net/cfg80211.h>
16 #include "sysfs.h"
17 #include "core.h"
18 #include "rdev-ops.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 static DEVICE_ATTR_RO(name)
34
35 SHOW_FMT(index, "%d", wiphy_idx);
36 SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
37 SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
38
name_show(struct device * dev,struct device_attribute * attr,char * buf)39 static ssize_t name_show(struct device *dev,
40 struct device_attribute *attr,
41 char *buf)
42 {
43 struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
44
45 return sprintf(buf, "%s\n", wiphy_name(wiphy));
46 }
47 static DEVICE_ATTR_RO(name);
48
addresses_show(struct device * dev,struct device_attribute * attr,char * buf)49 static ssize_t addresses_show(struct device *dev,
50 struct device_attribute *attr,
51 char *buf)
52 {
53 struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
54 char *start = buf;
55 int i;
56
57 if (!wiphy->addresses)
58 return sprintf(buf, "%pM\n", wiphy->perm_addr);
59
60 for (i = 0; i < wiphy->n_addresses; i++)
61 buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr);
62
63 return buf - start;
64 }
65 static DEVICE_ATTR_RO(addresses);
66
67 static struct attribute *ieee80211_attrs[] = {
68 &dev_attr_index.attr,
69 &dev_attr_macaddress.attr,
70 &dev_attr_address_mask.attr,
71 &dev_attr_addresses.attr,
72 &dev_attr_name.attr,
73 NULL,
74 };
75 ATTRIBUTE_GROUPS(ieee80211);
76
wiphy_dev_release(struct device * dev)77 static void wiphy_dev_release(struct device *dev)
78 {
79 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
80
81 cfg80211_dev_free(rdev);
82 }
83
wiphy_uevent(struct device * dev,struct kobj_uevent_env * env)84 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
85 {
86 /* TODO, we probably need stuff here */
87 return 0;
88 }
89
90 #ifdef CONFIG_PM_SLEEP
cfg80211_leave_all(struct cfg80211_registered_device * rdev)91 static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
92 {
93 struct wireless_dev *wdev;
94
95 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
96 cfg80211_leave(rdev, wdev);
97 }
98
wiphy_suspend(struct device * dev)99 static int wiphy_suspend(struct device *dev)
100 {
101 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
102 int ret = 0;
103
104 rdev->suspend_at = ktime_get_boottime_seconds();
105
106 rtnl_lock();
107 if (rdev->wiphy.registered) {
108 if (!rdev->wiphy.wowlan_config) {
109 cfg80211_leave_all(rdev);
110 cfg80211_process_rdev_events(rdev);
111 }
112 if (rdev->ops->suspend)
113 ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
114 if (ret == 1) {
115 /* Driver refuse to configure wowlan */
116 cfg80211_leave_all(rdev);
117 cfg80211_process_rdev_events(rdev);
118 ret = rdev_suspend(rdev, NULL);
119 }
120 }
121 rtnl_unlock();
122
123 return ret;
124 }
125
wiphy_resume(struct device * dev)126 static int wiphy_resume(struct device *dev)
127 {
128 struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
129 int ret = 0;
130
131 /* Age scan results with time spent in suspend */
132 cfg80211_bss_age(rdev, ktime_get_boottime_seconds() - rdev->suspend_at);
133
134 rtnl_lock();
135 if (rdev->wiphy.registered && rdev->ops->resume)
136 ret = rdev_resume(rdev);
137 rtnl_unlock();
138
139 return ret;
140 }
141
142 static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
143 #define WIPHY_PM_OPS (&wiphy_pm_ops)
144 #else
145 #define WIPHY_PM_OPS NULL
146 #endif
147
wiphy_namespace(struct device * d)148 static const void *wiphy_namespace(struct device *d)
149 {
150 struct wiphy *wiphy = container_of(d, struct wiphy, dev);
151
152 return wiphy_net(wiphy);
153 }
154
155 struct class ieee80211_class = {
156 .name = "ieee80211",
157 .owner = THIS_MODULE,
158 .dev_release = wiphy_dev_release,
159 .dev_groups = ieee80211_groups,
160 .dev_uevent = wiphy_uevent,
161 .pm = WIPHY_PM_OPS,
162 .ns_type = &net_ns_type_operations,
163 .namespace = wiphy_namespace,
164 };
165
wiphy_sysfs_init(void)166 int wiphy_sysfs_init(void)
167 {
168 return class_register(&ieee80211_class);
169 }
170
wiphy_sysfs_exit(void)171 void wiphy_sysfs_exit(void)
172 {
173 class_unregister(&ieee80211_class);
174 }
175
