[MAC80211]: Add debugfs attributes.

Export various mac80211 internal variables through debugfs.

Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 440 insertions, 0 deletions

diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
new file mode 100644
index 000000000000..9e3964638bad
--- /dev/null
+++ b/net/mac80211/debugfs_netdev.c
@@ -0,0 +1,440 @@
+/*
+ * 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->u.sta.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;
+	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;
+
+	/* TODO
+	sprintf(buf, "netdev:%s", dev->name);
+	debugfs_rename(IEEE80211_DEV_TO_SUB_IF(dev)->debugfsdir, 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;
+}