cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sysfs.c (4143B)

      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 * Copyright (C) 2020-2021 Intel Corporation
      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#include "rdev-ops.h"
     20
     21static inline struct cfg80211_registered_device *dev_to_rdev(
     22	struct device *dev)
     23{
     24	return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
     25}
     26
     27#define SHOW_FMT(name, fmt, member)					\
     28static ssize_t name ## _show(struct device *dev,			\
     29			      struct device_attribute *attr,		\
     30			      char *buf)				\
     31{									\
     32	return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);	\
     33}									\
     34static DEVICE_ATTR_RO(name)
     35
     36SHOW_FMT(index, "%d", wiphy_idx);
     37SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
     38SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
     39
     40static ssize_t name_show(struct device *dev,
     41			 struct device_attribute *attr,
     42			 char *buf)
     43{
     44	struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
     45
     46	return sprintf(buf, "%s\n", wiphy_name(wiphy));
     47}
     48static DEVICE_ATTR_RO(name);
     49
     50static ssize_t addresses_show(struct device *dev,
     51			      struct device_attribute *attr,
     52			      char *buf)
     53{
     54	struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
     55	char *start = buf;
     56	int i;
     57
     58	if (!wiphy->addresses)
     59		return sprintf(buf, "%pM\n", wiphy->perm_addr);
     60
     61	for (i = 0; i < wiphy->n_addresses; i++)
     62		buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr);
     63
     64	return buf - start;
     65}
     66static DEVICE_ATTR_RO(addresses);
     67
     68static struct attribute *ieee80211_attrs[] = {
     69	&dev_attr_index.attr,
     70	&dev_attr_macaddress.attr,
     71	&dev_attr_address_mask.attr,
     72	&dev_attr_addresses.attr,
     73	&dev_attr_name.attr,
     74	NULL,
     75};
     76ATTRIBUTE_GROUPS(ieee80211);
     77
     78static void wiphy_dev_release(struct device *dev)
     79{
     80	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
     81
     82	cfg80211_dev_free(rdev);
     83}
     84
     85#ifdef CONFIG_PM_SLEEP
     86static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
     87{
     88	struct wireless_dev *wdev;
     89
     90	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
     91		cfg80211_leave(rdev, wdev);
     92}
     93
     94static int wiphy_suspend(struct device *dev)
     95{
     96	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
     97	int ret = 0;
     98
     99	rdev->suspend_at = ktime_get_boottime_seconds();
    100
    101	rtnl_lock();
    102	wiphy_lock(&rdev->wiphy);
    103	if (rdev->wiphy.registered) {
    104		if (!rdev->wiphy.wowlan_config) {
    105			cfg80211_leave_all(rdev);
    106			cfg80211_process_rdev_events(rdev);
    107		}
    108		if (rdev->ops->suspend)
    109			ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
    110		if (ret == 1) {
    111			/* Driver refuse to configure wowlan */
    112			cfg80211_leave_all(rdev);
    113			cfg80211_process_rdev_events(rdev);
    114			ret = rdev_suspend(rdev, NULL);
    115		}
    116	}
    117	wiphy_unlock(&rdev->wiphy);
    118	rtnl_unlock();
    119
    120	return ret;
    121}
    122
    123static int wiphy_resume(struct device *dev)
    124{
    125	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
    126	int ret = 0;
    127
    128	/* Age scan results with time spent in suspend */
    129	cfg80211_bss_age(rdev, ktime_get_boottime_seconds() - rdev->suspend_at);
    130
    131	rtnl_lock();
    132	wiphy_lock(&rdev->wiphy);
    133	if (rdev->wiphy.registered && rdev->ops->resume)
    134		ret = rdev_resume(rdev);
    135	wiphy_unlock(&rdev->wiphy);
    136
    137	if (ret)
    138		cfg80211_shutdown_all_interfaces(&rdev->wiphy);
    139
    140	rtnl_unlock();
    141
    142	return ret;
    143}
    144
    145static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
    146#define WIPHY_PM_OPS (&wiphy_pm_ops)
    147#else
    148#define WIPHY_PM_OPS NULL
    149#endif
    150
    151static const void *wiphy_namespace(struct device *d)
    152{
    153	struct wiphy *wiphy = container_of(d, struct wiphy, dev);
    154
    155	return wiphy_net(wiphy);
    156}
    157
    158struct class ieee80211_class = {
    159	.name = "ieee80211",
    160	.owner = THIS_MODULE,
    161	.dev_release = wiphy_dev_release,
    162	.dev_groups = ieee80211_groups,
    163	.pm = WIPHY_PM_OPS,
    164	.ns_type = &net_ns_type_operations,
    165	.namespace = wiphy_namespace,
    166};
    167
    168int wiphy_sysfs_init(void)
    169{
    170	return class_register(&ieee80211_class);
    171}
    172
    173void wiphy_sysfs_exit(void)
    174{
    175	class_unregister(&ieee80211_class);
    176}