diff options
Diffstat (limited to 'net/wireless/sysfs.c')
| -rw-r--r-- | net/wireless/sysfs.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/net/wireless/sysfs.c b/net/wireless/sysfs.c new file mode 100644 index 000000000..a88f338c6 --- /dev/null +++ b/net/wireless/sysfs.c @@ -0,0 +1,182 @@ +// 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, 2023 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); + } + cfg80211_process_wiphy_works(rdev, NULL); + 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); + cfg80211_process_wiphy_works(rdev, NULL); + ret = rdev_suspend(rdev, NULL); + } + if (ret == 0) + rdev->suspended = true; + } + 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); + rdev->suspended = false; + schedule_work(&rdev->wiphy_work); + 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(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); +} |