/* * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/kernel.h> #include <linux/device.h> #include <linux/if.h> #include <linux/interrupt.h> #include <linux/netdevice.h> #include <linux/rtnetlink.h> #include <linux/notifier.h> #include <net/mac80211.h> #include <net/cfg80211.h> #include "ieee80211_i.h" #include "ieee80211_rate.h" #include "debugfs.h" #include "debugfs_netdev.h" static ssize_t ieee80211_if_read( struct ieee80211_sub_if_data *sdata, char __user *userbuf, size_t count, loff_t *ppos, ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int)) { char buf[70]; ssize_t ret = -EINVAL; read_lock(&dev_base_lock); if (sdata->dev->reg_state == NETREG_REGISTERED) { ret = (*format)(sdata, buf, sizeof(buf)); ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret); } read_unlock(&dev_base_lock); return ret; } #define IEEE80211_IF_FMT(name, field, format_string) \ static ssize_t ieee80211_if_fmt_##name( \ const struct ieee80211_sub_if_data *sdata, char *buf, \ int buflen) \ { \ return scnprintf(buf, buflen, format_string, sdata->field); \ } #define IEEE80211_IF_FMT_DEC(name, field) \ IEEE80211_IF_FMT(name, field, "%d\n") #define IEEE80211_IF_FMT_HEX(name, field) \ IEEE80211_IF_FMT(name, field, "%#x\n") #define IEEE80211_IF_FMT_SIZE(name, field) \ IEEE80211_IF_FMT(name, field, "%zd\n") #define IEEE80211_IF_FMT_ATOMIC(name, field) \ static ssize_t ieee80211_if_fmt_##name( \ const struct ieee80211_sub_if_data *sdata, \ char *buf, int buflen) \ { \ return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\ } #define IEEE80211_IF_FMT_MAC(name, field) \ static ssize_t ieee80211_if_fmt_##name( \ const struct ieee80211_sub_if_data *sdata, char *buf, \ int buflen) \ { \ return scnprintf(buf, buflen, MAC_FMT "\n", MAC_ARG(sdata->field));\ } #define __IEEE80211_IF_FILE(name) \ static ssize_t ieee80211_if_read_##name(struct file *file, \ char __user *userbuf, \ size_t count, loff_t *ppos) \ { \ return ieee80211_if_read(file->private_data, \ userbuf, count, ppos, \ ieee80211_if_fmt_##name); \ } \ static const struct file_operations name##_ops = { \ .read = ieee80211_if_read_##name, \ .open = mac80211_open_file_generic, \ } #define IEEE80211_IF_FILE(name, field, format) \ IEEE80211_IF_FMT_##format(name, field) \ __IEEE80211_IF_FILE(name) /* common attributes */ IEEE80211_IF_FILE(channel_use, channel_use, DEC); IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC); IEEE80211_IF_FILE(eapol, eapol, DEC); IEEE80211_IF_FILE(ieee8021_x, ieee802_1x, DEC); /* STA/IBSS attributes */ IEEE80211_IF_FILE(state, u.sta.state, DEC); IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC); IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC); IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE); IEEE80211_IF_FILE(aid, u.sta.aid, DEC); IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX); IEEE80211_IF_FILE(capab, u.sta.capab, HEX); IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE); IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC); IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC); IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX); IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC); IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC); static ssize_t ieee80211_if_fmt_flags( const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) { return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n", sdata->u.sta.ssid_set ? "SSID\n" : "", sdata->u.sta.bssid_set ? "BSSID\n" : "", sdata->u.sta.prev_bssid_set ? "prev BSSID\n" : "", sdata->u.sta.authenticated ? "AUTH\n" : "", sdata->u.sta.associated ? "ASSOC\n" : "", sdata->u.sta.probereq_poll ? "PROBEREQ POLL\n" : "", sdata->use_protection ? "CTS prot\n" : ""); } __IEEE80211_IF_FILE(flags); /* AP attributes */ IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC); IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC); IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC); IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC); IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC); IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC); static ssize_t ieee80211_if_fmt_num_buffered_multicast( const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) { return scnprintf(buf, buflen, "%u\n", skb_queue_len(&sdata->u.ap.ps_bc_buf)); } __IEEE80211_IF_FILE(num_buffered_multicast); static ssize_t ieee80211_if_fmt_beacon_head_len( const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) { if (sdata->u.ap.beacon_head) return scnprintf(buf, buflen, "%d\n", sdata->u.ap.beacon_head_len); return scnprintf(buf, buflen, "\n"); } __IEEE80211_IF_FILE(beacon_head_len); static ssize_t ieee80211_if_fmt_beacon_tail_len( const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) { if (sdata->u.ap.beacon_tail) return scnprintf(buf, buflen, "%d\n", sdata->u.ap.beacon_tail_len); return scnprintf(buf, buflen, "\n"); } __IEEE80211_IF_FILE(beacon_tail_len); /* WDS attributes */ IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC); /* VLAN attributes */ IEEE80211_IF_FILE(vlan_id, u.vlan.id, DEC); /* MONITOR attributes */ static ssize_t ieee80211_if_fmt_mode( const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) { struct ieee80211_local *local = sdata->local; return scnprintf(buf, buflen, "%s\n", ((local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) || local->open_count == local->monitors) ? "hard" : "soft"); } __IEEE80211_IF_FILE(mode); #define DEBUGFS_ADD(name, type)\ sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\ sdata->debugfsdir, sdata, &name##_ops); static void add_sta_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_ADD(channel_use, sta); DEBUGFS_ADD(drop_unencrypted, sta); DEBUGFS_ADD(eapol, sta); DEBUGFS_ADD(ieee8021_x, sta); DEBUGFS_ADD(state, sta); DEBUGFS_ADD(bssid, sta); DEBUGFS_ADD(prev_bssid, sta); DEBUGFS_ADD(ssid_len, sta); DEBUGFS_ADD(aid, sta); DEBUGFS_ADD(ap_capab, sta); DEBUGFS_ADD(capab, sta); DEBUGFS_ADD(extra_ie_len, sta); DEBUGFS_ADD(auth_tries, sta); DEBUGFS_ADD(assoc_tries, sta); DEBUGFS_ADD(auth_algs, sta); DEBUGFS_ADD(auth_alg, sta); DEBUGFS_ADD(auth_transaction, sta); DEBUGFS_ADD(flags, sta); } static void add_ap_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_ADD(channel_use, ap); DEBUGFS_ADD(drop_unencrypted, ap); DEBUGFS_ADD(eapol, ap); DEBUGFS_ADD(ieee8021_x, ap); DEBUGFS_ADD(num_sta_ps, ap); DEBUGFS_ADD(dtim_period, ap); DEBUGFS_ADD(dtim_count, ap); DEBUGFS_ADD(num_beacons, ap); DEBUGFS_ADD(force_unicast_rateidx, ap); DEBUGFS_ADD(max_ratectrl_rateidx, ap); DEBUGFS_ADD(num_buffered_multicast, ap); DEBUGFS_ADD(beacon_head_len, ap); DEBUGFS_ADD(beacon_tail_len, ap); } static void add_wds_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_ADD(channel_use, wds); DEBUGFS_ADD(drop_unencrypted, wds); DEBUGFS_ADD(eapol, wds); DEBUGFS_ADD(ieee8021_x, wds); DEBUGFS_ADD(peer, wds); } static void add_vlan_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_ADD(channel_use, vlan); DEBUGFS_ADD(drop_unencrypted, vlan); DEBUGFS_ADD(eapol, vlan); DEBUGFS_ADD(ieee8021_x, vlan); DEBUGFS_ADD(vlan_id, vlan); } static void add_monitor_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_ADD(mode, monitor); } static void add_files(struct ieee80211_sub_if_data *sdata) { if (!sdata->debugfsdir) return; switch (sdata->type) { case IEEE80211_IF_TYPE_STA: case IEEE80211_IF_TYPE_IBSS: add_sta_files(sdata); break; case IEEE80211_IF_TYPE_AP: add_ap_files(sdata); break; case IEEE80211_IF_TYPE_WDS: add_wds_files(sdata); break; case IEEE80211_IF_TYPE_MNTR: add_monitor_files(sdata); break; case IEEE80211_IF_TYPE_VLAN: add_vlan_files(sdata); break; default: break; } } #define DEBUGFS_DEL(name, type)\ debugfs_remove(sdata->debugfs.type.name);\ sdata->debugfs.type.name = NULL; static void del_sta_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_DEL(channel_use, sta); DEBUGFS_DEL(drop_unencrypted, sta); DEBUGFS_DEL(eapol, sta); DEBUGFS_DEL(ieee8021_x, sta); DEBUGFS_DEL(state, sta); DEBUGFS_DEL(bssid, sta); DEBUGFS_DEL(prev_bssid, sta); DEBUGFS_DEL(ssid_len, sta); DEBUGFS_DEL(aid, sta); DEBUGFS_DEL(ap_capab, sta); DEBUGFS_DEL(capab, sta); DEBUGFS_DEL(extra_ie_len, sta); DEBUGFS_DEL(auth_tries, sta); DEBUGFS_DEL(assoc_tries, sta); DEBUGFS_DEL(auth_algs, sta); DEBUGFS_DEL(auth_alg, sta); DEBUGFS_DEL(auth_transaction, sta); DEBUGFS_DEL(flags, sta); } static void del_ap_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_DEL(channel_use, ap); DEBUGFS_DEL(drop_unencrypted, ap); DEBUGFS_DEL(eapol, ap); DEBUGFS_DEL(ieee8021_x, ap); DEBUGFS_DEL(num_sta_ps, ap); DEBUGFS_DEL(dtim_period, ap); DEBUGFS_DEL(dtim_count, ap); DEBUGFS_DEL(num_beacons, ap); DEBUGFS_DEL(force_unicast_rateidx, ap); DEBUGFS_DEL(max_ratectrl_rateidx, ap); DEBUGFS_DEL(num_buffered_multicast, ap); DEBUGFS_DEL(beacon_head_len, ap); DEBUGFS_DEL(beacon_tail_len, ap); } static void del_wds_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_DEL(channel_use, wds); DEBUGFS_DEL(drop_unencrypted, wds); DEBUGFS_DEL(eapol, wds); DEBUGFS_DEL(ieee8021_x, wds); DEBUGFS_DEL(peer, wds); } static void del_vlan_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_DEL(channel_use, vlan); DEBUGFS_DEL(drop_unencrypted, vlan); DEBUGFS_DEL(eapol, vlan); DEBUGFS_DEL(ieee8021_x, vlan); DEBUGFS_DEL(vlan_id, vlan); } static void del_monitor_files(struct ieee80211_sub_if_data *sdata) { DEBUGFS_DEL(mode, monitor); } static void del_files(struct ieee80211_sub_if_data *sdata, int type) { if (!sdata->debugfsdir) return; switch (type) { case IEEE80211_IF_TYPE_STA: case IEEE80211_IF_TYPE_IBSS: del_sta_files(sdata); break; case IEEE80211_IF_TYPE_AP: del_ap_files(sdata); break; case IEEE80211_IF_TYPE_WDS: del_wds_files(sdata); break; case IEEE80211_IF_TYPE_MNTR: del_monitor_files(sdata); break; case IEEE80211_IF_TYPE_VLAN: del_vlan_files(sdata); break; default: break; } } static int notif_registered; void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata) { char buf[10+IFNAMSIZ]; if (!notif_registered) return; sprintf(buf, "netdev:%s", sdata->dev->name); sdata->debugfsdir = debugfs_create_dir(buf, sdata->local->hw.wiphy->debugfsdir); } void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata) { del_files(sdata, sdata->type); debugfs_remove(sdata->debugfsdir); sdata->debugfsdir = NULL; } void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata, int oldtype) { del_files(sdata, oldtype); add_files(sdata); } static int netdev_notify(struct notifier_block * nb, unsigned long state, void *ndev) { struct net_device *dev = ndev; struct dentry *dir; struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); char buf[10+IFNAMSIZ]; if (state != NETDEV_CHANGENAME) return 0; if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) return 0; if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) return 0; sprintf(buf, "netdev:%s", dev->name); dir = sdata->debugfsdir; if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf)) printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs " "dir to %s\n", buf); return 0; } static struct notifier_block mac80211_debugfs_netdev_notifier = { .notifier_call = netdev_notify, }; void ieee80211_debugfs_netdev_init(void) { int err; err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier); if (err) { printk(KERN_ERR "mac80211: failed to install netdev notifier," " disabling per-netdev debugfs!\n"); } else notif_registered = 1; } void ieee80211_debugfs_netdev_exit(void) { unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier); notif_registered = 0; }