/* * mac80211 debugfs for wireless PHYs * * Copyright 2007	Johannes Berg <johannes@sipsolutions.net> * Copyright 2013-2014  Intel Mobile Communications GmbH * * GPLv2 * */ #include <linux/debugfs.h>#include <linux/rtnetlink.h>#include <linux/vmalloc.h>#include "ieee80211_i.h"#include "driver-ops.h"#include "rate.h"#include "debugfs.h" #define DEBUGFS_FORMAT_BUFFER_SIZE 100 int mac80211_format_buffer(char __user *userbuf, size_t count,				  loff_t *ppos, char *fmt, ...){	va_list args;	char buf[DEBUGFS_FORMAT_BUFFER_SIZE];	int res; 	va_start(args, fmt);	res = vscnprintf(buf, sizeof(buf), fmt, args);	va_end(args); 	return simple_read_from_buffer(userbuf, count, ppos, buf, res);} #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)			\static ssize_t name## _read(struct file *file, char __user *userbuf,	\			    size_t count, loff_t *ppos)			\{									\	struct ieee80211_local *local = file->private_data;		\									\	return mac80211_format_buffer(userbuf, count, ppos, 		\				      fmt "\n", ##value);		\} #define DEBUGFS_READONLY_FILE_OPS(name)			\static const struct file_operations name## _ops = {			\	.read = name## _read,						\	.open = simple_open,						\	.llseek = generic_file_llseek,					\}; #define DEBUGFS_READONLY_FILE(name, fmt, value...)		\	DEBUGFS_READONLY_FILE_FN(name, fmt, value)		\	DEBUGFS_READONLY_FILE_OPS(name) #define DEBUGFS_ADD(name)						\	debugfs_create_file(#name, 0400, phyd, local, &name## _ops); #define DEBUGFS_ADD_MODE(name, mode)					\	debugfs_create_file(#name, mode, phyd, local, &name## _ops);  DEBUGFS_READONLY_FILE(user_power, "%d",		      local->user_power_level);DEBUGFS_READONLY_FILE(power, "%d",		      local->hw.conf.power_level);DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",		      local->total_ps_buffered);DEBUGFS_READONLY_FILE(wep_iv, "%#08x",		      local->wep_iv & 0xffffff);DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",	local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); static ssize_t aqm_read(struct file *file,			char __user *user_buf,			size_t count,			loff_t *ppos){	struct ieee80211_local *local = file->private_data;	struct fq *fq = &local->fq;	char buf[200];	int len = 0; 	spin_lock_bh(&local->fq.lock);	rcu_read_lock(); 	len = scnprintf(buf, sizeof(buf),			"access name value\n"			"R fq_flows_cnt %u\n"			"R fq_backlog %u\n"			"R fq_overlimit %u\n"			"R fq_overmemory %u\n"			"R fq_collisions %u\n"			"R fq_memory_usage %u\n"			"RW fq_memory_limit %u\n"			"RW fq_limit %u\n"			"RW fq_quantum %u\n",			fq->flows_cnt,			fq->backlog,			fq->overmemory,			fq->overlimit,			fq->collisions,			fq->memory_usage,			fq->memory_limit,			fq->limit,			fq->quantum); 	rcu_read_unlock();	spin_unlock_bh(&local->fq.lock); 	return simple_read_from_buffer(user_buf, count, ppos,				       buf, len);} static ssize_t aqm_write(struct file *file,			 const char __user *user_buf,			 size_t count,			 loff_t *ppos){	struct ieee80211_local *local = file->private_data;	char buf[100];	size_t len; 	if (count > sizeof(buf))		return -EINVAL; 	if (copy_from_user(buf, user_buf, count))		return -EFAULT; 	buf[sizeof(buf) - 1] = '\0';	len = strlen(buf);	if (len > 0 && buf[len-1] == '\n')		buf[len-1] = 0; 	if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)		return count;	else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1)		return count;	else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)		return count; 	return -EINVAL;} static const struct file_operations aqm_ops = {	.write = aqm_write,	.read = aqm_read,	.open = simple_open,	.llseek = default_llseek,}; #ifdef CONFIG_PMstatic ssize_t reset_write(struct file *file, const char __user *user_buf,			   size_t count, loff_t *ppos){	struct ieee80211_local *local = file->private_data; 	rtnl_lock();	__ieee80211_suspend(&local->hw, NULL);	__ieee80211_resume(&local->hw);	rtnl_unlock(); 	return count;} static const struct file_operations reset_ops = {	.write = reset_write,	.open = simple_open,	.llseek = noop_llseek,};#endif static const char *hw_flag_names[] = {#define FLAG(F)	[IEEE80211_HW_##F] = #F	FLAG(HAS_RATE_CONTROL),	FLAG(RX_INCLUDES_FCS),	FLAG(HOST_BROADCAST_PS_BUFFERING),	FLAG(SIGNAL_UNSPEC),	FLAG(SIGNAL_DBM),	FLAG(NEED_DTIM_BEFORE_ASSOC),	FLAG(SPECTRUM_MGMT),	FLAG(AMPDU_AGGREGATION),	FLAG(SUPPORTS_PS),	FLAG(PS_NULLFUNC_STACK),	FLAG(SUPPORTS_DYNAMIC_PS),	FLAG(MFP_CAPABLE),	FLAG(WANT_MONITOR_VIF),	FLAG(NO_AUTO_VIF),	FLAG(SW_CRYPTO_CONTROL),	FLAG(SUPPORT_FAST_XMIT),	FLAG(REPORTS_TX_ACK_STATUS),	FLAG(CONNECTION_MONITOR),	FLAG(QUEUE_CONTROL),	FLAG(SUPPORTS_PER_STA_GTK),	FLAG(AP_LINK_PS),	FLAG(TX_AMPDU_SETUP_IN_HW),	FLAG(SUPPORTS_RC_TABLE),	FLAG(P2P_DEV_ADDR_FOR_INTF),	FLAG(TIMING_BEACON_ONLY),	FLAG(SUPPORTS_HT_CCK_RATES),	FLAG(CHANCTX_STA_CSA),	FLAG(SUPPORTS_CLONED_SKBS),	FLAG(SINGLE_SCAN_ON_ALL_BANDS),	FLAG(TDLS_WIDER_BW),	FLAG(SUPPORTS_AMSDU_IN_AMPDU),	FLAG(BEACON_TX_STATUS),	FLAG(NEEDS_UNIQUE_STA_ADDR),	FLAG(SUPPORTS_REORDERING_BUFFER),	FLAG(USES_RSS),	FLAG(TX_AMSDU),	FLAG(TX_FRAG_LIST),	FLAG(REPORTS_LOW_ACK),	FLAG(SUPPORTS_TX_FRAG),#undef FLAG}; static ssize_t hwflags_read(struct file *file, char __user *user_buf,			    size_t count, loff_t *ppos){	struct ieee80211_local *local = file->private_data;	size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;	char *buf = kzalloc(bufsz, GFP_KERNEL);	char *pos = buf, *end = buf + bufsz - 1;	ssize_t rv;	int i; 	if (!buf)		return -ENOMEM; 	/* fail compilation if somebody adds or removes	 * a flag without updating the name array above	 */	BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); 	for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {		if (test_bit(i, local->hw.flags))			pos += scnprintf(pos, end - pos, "%s\n",					 hw_flag_names[i]);	} 	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));	kfree(buf);	return rv;} static ssize_t misc_read(struct file *file, char __user *user_buf,			 size_t count, loff_t *ppos){	struct ieee80211_local *local = file->private_data;	/* Max len of each line is 16 characters, plus 9 for 'pending:\n' */	size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;	char *buf;	char *pos, *end;	ssize_t rv;	int i;	int ln; 	buf = kzalloc(bufsz, GFP_KERNEL);	if (!buf)		return -ENOMEM; 	pos = buf;	end = buf + bufsz - 1; 	pos += scnprintf(pos, end - pos, "pending:\n"); 	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {		ln = skb_queue_len(&local->pending[i]);		pos += scnprintf(pos, end - pos, "[%i] %d\n",				 i, ln);	} 	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));	kfree(buf);	return rv;} static ssize_t queues_read(struct file *file, char __user *user_buf,			   size_t count, loff_t *ppos){	struct ieee80211_local *local = file->private_data;	unsigned long flags;	char buf[IEEE80211_MAX_QUEUES * 20];	int q, res = 0; 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);	for (q = 0; q < local->hw.queues; q++)		res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,				local->queue_stop_reasons[q],				skb_queue_len(&local->pending[q]));	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 	return simple_read_from_buffer(user_buf, count, ppos, buf, res);} DEBUGFS_READONLY_FILE_OPS(hwflags);DEBUGFS_READONLY_FILE_OPS(queues);DEBUGFS_READONLY_FILE_OPS(misc); /* statistics stuff */ static ssize_t format_devstat_counter(struct ieee80211_local *local,	char __user *userbuf,	size_t count, loff_t *ppos,	int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,			  int buflen)){	struct ieee80211_low_level_stats stats;	char buf[20];	int res; 	rtnl_lock();	res = drv_get_stats(local, &stats);	rtnl_unlock();	if (res)		return res;	res = printvalue(&stats, buf, sizeof(buf));	return simple_read_from_buffer(userbuf, count, ppos, buf, res);} #define DEBUGFS_DEVSTATS_FILE(name)					\static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\				 char *buf, int buflen)			\{									\	return scnprintf(buf, buflen, "%u\n", stats->name);		\}									\static ssize_t stats_ ##name## _read(struct file *file,			\				     char __user *userbuf,		\				     size_t count, loff_t *ppos)	\{									\	return format_devstat_counter(file->private_data,		\				      userbuf,				\				      count,				\				      ppos,				\				      print_devstats_##name);		\}									\									\static const struct file_operations stats_ ##name## _ops = {		\	.read = stats_ ##name## _read,					\	.open = simple_open,						\	.llseek = generic_file_llseek,					\}; #define DEBUGFS_STATS_ADD(name)					\	debugfs_create_u32(#name, 0400, statsd, &local->name);#define DEBUGFS_DEVSTATS_ADD(name)					\	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); void debugfs_hw_add(struct ieee80211_local *local){	struct dentry *phyd = local->hw.wiphy->debugfsdir;	struct dentry *statsd; 	if (!phyd)		return; 	local->debugfs.keys = debugfs_create_dir("keys", phyd); 	DEBUGFS_ADD(total_ps_buffered);	DEBUGFS_ADD(wep_iv);	DEBUGFS_ADD(rate_ctrl_alg);	DEBUGFS_ADD(queues);	DEBUGFS_ADD(misc);#ifdef CONFIG_PM	DEBUGFS_ADD_MODE(reset, 0200);#endif	DEBUGFS_ADD(hwflags);	DEBUGFS_ADD(user_power);	DEBUGFS_ADD(power); 	if (local->ops->wake_tx_queue)		DEBUGFS_ADD_MODE(aqm, 0600); 	statsd = debugfs_create_dir("statistics", phyd); 	/* if the dir failed, don't put all the other things into the root! */	if (!statsd)		return; #ifdef CONFIG_MAC80211_DEBUG_COUNTERS	DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);	DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);	DEBUGFS_STATS_ADD(dot11FailedCount);	DEBUGFS_STATS_ADD(dot11RetryCount);	DEBUGFS_STATS_ADD(dot11MultipleRetryCount);	DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);	DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);	DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);	DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);	DEBUGFS_STATS_ADD(tx_handlers_drop);	DEBUGFS_STATS_ADD(tx_handlers_queued);	DEBUGFS_STATS_ADD(tx_handlers_drop_wep);	DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);	DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);	DEBUGFS_STATS_ADD(rx_handlers_drop);	DEBUGFS_STATS_ADD(rx_handlers_queued);	DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);	DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);	DEBUGFS_STATS_ADD(tx_expand_skb_head);	DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);	DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);	DEBUGFS_STATS_ADD(rx_handlers_fragments);	DEBUGFS_STATS_ADD(tx_status_drop);#endif	DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);	DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);	DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);	DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);}