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 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 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 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 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 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 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 if (rdev->wiphy.registered) 97 ret = rdev->ops->suspend(&rdev->wiphy, rdev->wowlan); 98 rtnl_unlock(); 99 } 100 101 return ret; 102 } 103 104 static int wiphy_resume(struct device *dev) 105 { 106 struct cfg80211_registered_device *rdev = dev_to_rdev(dev); 107 int ret = 0; 108 109 /* Age scan results with time spent in suspend */ 110 spin_lock_bh(&rdev->bss_lock); 111 cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at); 112 spin_unlock_bh(&rdev->bss_lock); 113 114 if (rdev->ops->resume) { 115 rtnl_lock(); 116 if (rdev->wiphy.registered) 117 ret = rdev->ops->resume(&rdev->wiphy); 118 rtnl_unlock(); 119 } 120 121 return ret; 122 } 123 124 static const void *wiphy_namespace(struct device *d) 125 { 126 struct wiphy *wiphy = container_of(d, struct wiphy, dev); 127 128 return wiphy_net(wiphy); 129 } 130 131 struct class ieee80211_class = { 132 .name = "ieee80211", 133 .owner = THIS_MODULE, 134 .dev_release = wiphy_dev_release, 135 .dev_attrs = ieee80211_dev_attrs, 136 #ifdef CONFIG_HOTPLUG 137 .dev_uevent = wiphy_uevent, 138 #endif 139 .suspend = wiphy_suspend, 140 .resume = wiphy_resume, 141 .ns_type = &net_ns_type_operations, 142 .namespace = wiphy_namespace, 143 }; 144 145 int wiphy_sysfs_init(void) 146 { 147 return class_register(&ieee80211_class); 148 } 149 150 void wiphy_sysfs_exit(void) 151 { 152 class_unregister(&ieee80211_class); 153 } 154