[linux-block.git] / net / wireless / sysfs.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * This file provides /sys/class/ieee80211/<wiphy name>/
 * and some default attributes.
 *
 * Copyright 2005-2006	Jiri Benc <jbenc@suse.cz>
 * Copyright 2006	Johannes Berg <johannes@sipsolutions.net>
 * Copyright (C) 2020-2021 Intel Corporation
 */

#include <linux/device.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/nl80211.h>
#include <linux/rtnetlink.h>
#include <net/cfg80211.h>
#include "sysfs.h"
#include "core.h"
#include "rdev-ops.h"

static inline struct cfg80211_registered_device *dev_to_rdev(
	struct device *dev)
{
	return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
}

#define SHOW_FMT(name, fmt, member)					\
static ssize_t name ## _show(struct device *dev,			\
			      struct device_attribute *attr,		\
			      char *buf)				\
{									\
	return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);	\
}									\
static DEVICE_ATTR_RO(name)

SHOW_FMT(index, "%d", wiphy_idx);
SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);

static ssize_t name_show(struct device *dev,
			 struct device_attribute *attr,
			 char *buf)
{
	struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;

	return sprintf(buf, "%s\n", wiphy_name(wiphy));
}
static DEVICE_ATTR_RO(name);

static ssize_t addresses_show(struct device *dev,
			      struct device_attribute *attr,
			      char *buf)
{
	struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
	char *start = buf;
	int i;

	if (!wiphy->addresses)
		return sprintf(buf, "%pM\n", wiphy->perm_addr);

	for (i = 0; i < wiphy->n_addresses; i++)
		buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr);

	return buf - start;
}
static DEVICE_ATTR_RO(addresses);

static struct attribute *ieee80211_attrs[] = {
	&dev_attr_index.attr,
	&dev_attr_macaddress.attr,
	&dev_attr_address_mask.attr,
	&dev_attr_addresses.attr,
	&dev_attr_name.attr,
	NULL,
};
ATTRIBUTE_GROUPS(ieee80211);

static void wiphy_dev_release(struct device *dev)
{
	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);

	cfg80211_dev_free(rdev);
}

#ifdef CONFIG_PM_SLEEP
static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
{
	struct wireless_dev *wdev;

	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
		cfg80211_leave(rdev, wdev);
}

static int wiphy_suspend(struct device *dev)
{
	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
	int ret = 0;

	rdev->suspend_at = ktime_get_boottime_seconds();

	rtnl_lock();
	wiphy_lock(&rdev->wiphy);
	if (rdev->wiphy.registered) {
		if (!rdev->wiphy.wowlan_config) {
			cfg80211_leave_all(rdev);
			cfg80211_process_rdev_events(rdev);
		}
		if (rdev->ops->suspend)
			ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
		if (ret == 1) {
			/* Driver refuse to configure wowlan */
			cfg80211_leave_all(rdev);
			cfg80211_process_rdev_events(rdev);
			ret = rdev_suspend(rdev, NULL);
		}
	}
	wiphy_unlock(&rdev->wiphy);
	rtnl_unlock();

	return ret;
}

static int wiphy_resume(struct device *dev)
{
	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
	int ret = 0;

	/* Age scan results with time spent in suspend */
	cfg80211_bss_age(rdev, ktime_get_boottime_seconds() - rdev->suspend_at);

	rtnl_lock();
	wiphy_lock(&rdev->wiphy);
	if (rdev->wiphy.registered && rdev->ops->resume)
		ret = rdev_resume(rdev);
	wiphy_unlock(&rdev->wiphy);

	if (ret)
		cfg80211_shutdown_all_interfaces(&rdev->wiphy);

	rtnl_unlock();

	return ret;
}

static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
#define WIPHY_PM_OPS (&wiphy_pm_ops)
#else
#define WIPHY_PM_OPS NULL
#endif

static const void *wiphy_namespace(const struct device *d)
{
	struct wiphy *wiphy = container_of(d, struct wiphy, dev);

	return wiphy_net(wiphy);
}

struct class ieee80211_class = {
	.name = "ieee80211",
	.owner = THIS_MODULE,
	.dev_release = wiphy_dev_release,
	.dev_groups = ieee80211_groups,
	.pm = WIPHY_PM_OPS,
	.ns_type = &net_ns_type_operations,
	.namespace = wiphy_namespace,
};

int wiphy_sysfs_init(void)
{
	return class_register(&ieee80211_class);
}

void wiphy_sysfs_exit(void)
{
	class_unregister(&ieee80211_class);
}
Commit	Line	Data
28c61a66	1	// SPDX-License-Identifier: GPL-2.0-only
704232c2 JB	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>
a05829a7	8	* Copyright (C) 2020-2021 Intel Corporation
704232c2 JB	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"
e35e4d28	19	#include "rdev-ops.h"
704232c2 JB	20
	21	static 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
4f6d4d1e JB	27	#define SHOW_FMT(name, fmt, member) \
	28	static 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); \
f0bc99c8 GKH	33	} \
f0bc99c8 GKH	34	static DEVICE_ATTR_RO(name)
704232c2	35
b5850a7a	36	SHOW_FMT(index, "%d", wiphy_idx);
4f6d4d1e	37	SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
ef15aac6 JB	38	SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
ef15aac6 JB	39
cfd8e12f BG	40	static ssize_t name_show(struct device *dev,
cfd8e12f BG	41	struct device_attribute *attr,
5ec71dd7 JB	42	char *buf)
5ec71dd7 JB	43	{
cfd8e12f	44	struct wiphy *wiphy = &dev_to_rdev(dev)->wiphy;
5ec71dd7 JB	45
5ec71dd7 JB	46	return sprintf(buf, "%s\n", wiphy_name(wiphy));
cfd8e12f	47	}
f0bc99c8	48	static DEVICE_ATTR_RO(name);
cfd8e12f	49
ef15aac6 JB	50	static 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++)
ec53c832	62	buf += sprintf(buf, "%pM\n", wiphy->addresses[i].addr);
ef15aac6 JB	63
	64	return buf - start;
	65	}
f0bc99c8 GKH	66	static DEVICE_ATTR_RO(addresses);
	67
	68	static 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,
704232c2	75	};
f0bc99c8	76	ATTRIBUTE_GROUPS(ieee80211);
704232c2 JB	77
	78	static 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
262918d8	85	#ifdef CONFIG_PM_SLEEP
81256969 SG	86	static void cfg80211_leave_all(struct cfg80211_registered_device *rdev)
	87	{
	88	struct wireless_dev *wdev;
	89
53873f13	90	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
81256969 SG	91	cfg80211_leave(rdev, wdev);
	92	}
	93
262918d8	94	static int wiphy_suspend(struct device *dev)
0378b3f1 JB	95	{
	96	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
	97	int ret = 0;
	98
fe0984d3	99	rdev->suspend_at = ktime_get_boottime_seconds();
cb3a8eec	100
81256969	101	rtnl_lock();
a05829a7	102	wiphy_lock(&rdev->wiphy);
81256969	103	if (rdev->wiphy.registered) {
e1957dba	104	if (!rdev->wiphy.wowlan_config) {
81256969	105	cfg80211_leave_all(rdev);
e1957dba JB	106	cfg80211_process_rdev_events(rdev);
e1957dba JB	107	}
81256969	108	if (rdev->ops->suspend)
6abb9cb9	109	ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
81256969 SG	110	if (ret == 1) {
	111	/* Driver refuse to configure wowlan */
	112	cfg80211_leave_all(rdev);
e1957dba	113	cfg80211_process_rdev_events(rdev);
81256969 SG	114	ret = rdev_suspend(rdev, NULL);
81256969 SG	115	}
0378b3f1	116	}
a05829a7	117	wiphy_unlock(&rdev->wiphy);
81256969	118	rtnl_unlock();
0378b3f1 JB	119
	120	return ret;
	121	}
	122
	123	static int wiphy_resume(struct device *dev)
	124	{
	125	struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
	126	int ret = 0;
	127
cb3a8eec	128	/* Age scan results with time spent in suspend */
fe0984d3	129	cfg80211_bss_age(rdev, ktime_get_boottime_seconds() - rdev->suspend_at);
cb3a8eec	130
b3ef5520	131	rtnl_lock();
a05829a7	132	wiphy_lock(&rdev->wiphy);
b3ef5520 AVS	133	if (rdev->wiphy.registered && rdev->ops->resume)
b3ef5520 AVS	134	ret = rdev_resume(rdev);
a05829a7	135	wiphy_unlock(&rdev->wiphy);
65bec836 JB	136
	137	if (ret)
	138	cfg80211_shutdown_all_interfaces(&rdev->wiphy);
	139
b3ef5520	140	rtnl_unlock();
0378b3f1 JB	141
	142	return ret;
	143	}
262918d8 LPC	144
	145	static 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
6abb9cb9	149	#endif
0378b3f1	150
fa627348	151	static const void wiphy_namespace(const struct device d)
04600794 JB	152	{
	153	struct wiphy *wiphy = container_of(d, struct wiphy, dev);
	154
	155	return wiphy_net(wiphy);
	156	}
	157
704232c2 JB	158	struct class ieee80211_class = {
	159	.name = "ieee80211",
	160	.owner = THIS_MODULE,
	161	.dev_release = wiphy_dev_release,
f0bc99c8	162	.dev_groups = ieee80211_groups,
262918d8	163	.pm = WIPHY_PM_OPS,
04600794 JB	164	.ns_type = &net_ns_type_operations,
04600794 JB	165	.namespace = wiphy_namespace,
704232c2 JB	166	};
	167
	168	int wiphy_sysfs_init(void)
	169	{
	170	return class_register(&ieee80211_class);
	171	}
	172
	173	void wiphy_sysfs_exit(void)
	174	{
	175	class_unregister(&ieee80211_class);
	176	}