fe0984d389
The cfg80211 layer uses get_seconds() to read the current time in its supend handling. This function is deprecated because of the 32-bit time_t overflow, and it can cause unexpected behavior when the time changes due to settimeofday() calls or leap second updates. In many cases, we want to use monotonic time instead, however cfg80211 explicitly tracks the time spent in suspend, so this changes the driver over to use ktime_get_boottime_seconds(), which is slightly slower, but not used in a fastpath here. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
176 lines
4 KiB
C
176 lines
4 KiB
C
/*
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* This file provides /sys/class/ieee80211/<wiphy name>/
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* and some default attributes.
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*
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* Copyright 2005-2006 Jiri Benc <jbenc@suse.cz>
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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*
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* This file is GPLv2 as found in COPYING.
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*/
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/nl80211.h>
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#include <linux/rtnetlink.h>
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#include <net/cfg80211.h>
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#include "sysfs.h"
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#include "core.h"
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#include "rdev-ops.h"
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static inline struct cfg80211_registered_device *dev_to_rdev(
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struct device *dev)
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{
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return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
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}
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#define SHOW_FMT(name, fmt, member) \
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static ssize_t name ## _show(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member); \
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} \
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static DEVICE_ATTR_RO(name)
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SHOW_FMT(index, "%d", wiphy_idx);
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SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
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SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
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static ssize_t name_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
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return sprintf(buf, "%s\n", wiphy_name(wiphy));
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}
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static DEVICE_ATTR_RO(name);
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static ssize_t addresses_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
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char *start = buf;
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int i;
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if (!wiphy->addresses)
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return sprintf(buf, "%pM\n", wiphy->perm_addr);
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for (i = 0; i < wiphy->n_addresses; i++)
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buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr);
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return buf - start;
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}
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static DEVICE_ATTR_RO(addresses);
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static struct attribute *ieee80211_attrs[] = {
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&dev_attr_index.attr,
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&dev_attr_macaddress.attr,
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&dev_attr_address_mask.attr,
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&dev_attr_addresses.attr,
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&dev_attr_name.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(ieee80211);
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static void wiphy_dev_release(struct device *dev)
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{
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struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
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cfg80211_dev_free(rdev);
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}
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static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
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{
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/* TODO, we probably need stuff here */
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
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{
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struct wireless_dev *wdev;
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list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
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cfg80211_leave(rdev, wdev);
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}
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static int wiphy_suspend(struct device *dev)
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{
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struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
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int ret = 0;
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rdev->suspend_at = ktime_get_boottime_seconds();
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rtnl_lock();
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if (rdev->wiphy.registered) {
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if (!rdev->wiphy.wowlan_config) {
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cfg80211_leave_all(rdev);
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cfg80211_process_rdev_events(rdev);
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}
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if (rdev->ops->suspend)
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ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
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if (ret == 1) {
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/* Driver refuse to configure wowlan */
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cfg80211_leave_all(rdev);
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cfg80211_process_rdev_events(rdev);
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ret = rdev_suspend(rdev, NULL);
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}
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}
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rtnl_unlock();
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return ret;
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}
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static int wiphy_resume(struct device *dev)
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{
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struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
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int ret = 0;
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/* Age scan results with time spent in suspend */
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cfg80211_bss_age(rdev, ktime_get_boottime_seconds() - rdev->suspend_at);
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rtnl_lock();
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if (rdev->wiphy.registered && rdev->ops->resume)
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ret = rdev_resume(rdev);
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rtnl_unlock();
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return ret;
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}
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static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
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#define WIPHY_PM_OPS (&wiphy_pm_ops)
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#else
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#define WIPHY_PM_OPS NULL
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#endif
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static const void *wiphy_namespace(struct device *d)
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{
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struct wiphy *wiphy = container_of(d, struct wiphy, dev);
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return wiphy_net(wiphy);
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}
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struct class ieee80211_class = {
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.name = "ieee80211",
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.owner = THIS_MODULE,
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.dev_release = wiphy_dev_release,
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.dev_groups = ieee80211_groups,
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.dev_uevent = wiphy_uevent,
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.pm = WIPHY_PM_OPS,
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.ns_type = &net_ns_type_operations,
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.namespace = wiphy_namespace,
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};
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int wiphy_sysfs_init(void)
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{
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return class_register(&ieee80211_class);
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}
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void wiphy_sysfs_exit(void)
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{
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class_unregister(&ieee80211_class);
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}
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