Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 417 insertions, 0 deletions

diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
new file mode 100644
index 000000000..b5adf3625
--- /dev/null
+++ b/net/mac80211/debugfs.c
@@ -0,0 +1,417 @@
+/*
+ * 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_PM
+static 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),
+	FLAG(SUPPORTS_TDLS_BUFFER_STA),
+	FLAG(DEAUTH_NEED_MGD_TX_PREP),
+	FLAG(DOESNT_SUPPORT_QOS_NDP),
+#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);
+}