Revert "net: activity_stats: Add statistics for network transmission activity"

This reverts commit afedd7beba14385fd797166751fde39e0f52cf72.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>

5 files changed, 0 insertions, 152 deletions

diff --git a/drivers/misc/uid_stat.c b/drivers/misc/uid_stat.c
index 2141124a6c12..e6760b56083c 100644
--- a/drivers/misc/uid_stat.c
+++ b/drivers/misc/uid_stat.c
@@ -24,7 +24,6 @@
 #include <linux/spinlock.h>
 #include <linux/stat.h>
 #include <linux/uid_stat.h>
-#include <net/activity_stats.h>
 
 static DEFINE_SPINLOCK(uid_lock);
 static LIST_HEAD(uid_list);
@@ -123,7 +122,6 @@ static struct uid_stat *create_stat(uid_t uid) {
 
 int uid_stat_tcp_snd(uid_t uid, int size) {
 	struct uid_stat *entry;
-	activity_stats_update();
 	if ((entry = find_uid_stat(uid)) == NULL &&
 		((entry = create_stat(uid)) == NULL)) {
 			return -1;
@@ -134,7 +132,6 @@ int uid_stat_tcp_snd(uid_t uid, int size) {
 
 int uid_stat_tcp_rcv(uid_t uid, int size) {
 	struct uid_stat *entry;
-	activity_stats_update();
 	if ((entry = find_uid_stat(uid)) == NULL &&
 		((entry = create_stat(uid)) == NULL)) {
 			return -1;
diff --git a/include/net/activity_stats.h b/include/net/activity_stats.h
deleted file mode 100644
index 10e4c1506eeb..000000000000
--- a/include/net/activity_stats.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * Author: Mike Chan (mike@android.com)
- */
-
-#ifndef __activity_stats_h
-#define __activity_stats_h
-
-#ifdef CONFIG_NET_ACTIVITY_STATS
-void activity_stats_update(void);
-#else
-#define activity_stats_update(void) {}
-#endif
-
-#endif /* _NET_ACTIVITY_STATS_H */
diff --git a/net/Kconfig b/net/Kconfig
index 043fe1dc0860..ce9585cf343a 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -92,14 +92,6 @@ config ANDROID_PARANOID_NETWORK
 	help
 		none
 
-config NET_ACTIVITY_STATS
-	bool "Network activity statistics tracking"
-	default y
-	help
-	 Network activity statistics are useful for tracking wireless
-	 modem activity on 2G, 3G, 4G wireless networks. Counts number of
-	 transmissions and groups them in specified time buckets.
-
 config NETWORK_SECMARK
 	bool "Security Marking"
 	help
diff --git a/net/Makefile b/net/Makefile
index eeb9d5db454f..a5d04098dfce 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -77,4 +77,3 @@ endif
 ifneq ($(CONFIG_NET_L3_MASTER_DEV),)
 obj-y				+= l3mdev/
 endif
-obj-$(CONFIG_NET_ACTIVITY_STATS)		+= activity_stats.o
diff --git a/net/activity_stats.c b/net/activity_stats.c
deleted file mode 100644
index 8a3e93470069..000000000000
--- a/net/activity_stats.c
+++ /dev/null
@@ -1,115 +0,0 @@
-/* net/activity_stats.c
- *
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * Author: Mike Chan (mike@android.com)
- */
-
-#include <linux/proc_fs.h>
-#include <linux/suspend.h>
-#include <net/net_namespace.h>
-
-/*
- * Track transmission rates in buckets (power of 2).
- * 1,2,4,8...512 seconds.
- *
- * Buckets represent the count of network transmissions at least
- * N seconds apart, where N is 1 << bucket index.
- */
-#define BUCKET_MAX 10
-
-/* Track network activity frequency */
-static unsigned long activity_stats[BUCKET_MAX];
-static ktime_t last_transmit;
-static ktime_t suspend_time;
-static DEFINE_SPINLOCK(activity_lock);
-
-void activity_stats_update(void)
-{
-	int i;
-	unsigned long flags;
-	ktime_t now;
-	s64 delta;
-
-	spin_lock_irqsave(&activity_lock, flags);
-	now = ktime_get();
-	delta = ktime_to_ns(ktime_sub(now, last_transmit));
-
-	for (i = BUCKET_MAX - 1; i >= 0; i--) {
-		/*
-		 * Check if the time delta between network activity is within the
-		 * minimum bucket range.
-		 */
-		if (delta < (1000000000ULL << i))
-			continue;
-
-		activity_stats[i]++;
-		last_transmit = now;
-		break;
-	}
-	spin_unlock_irqrestore(&activity_lock, flags);
-}
-
-static int activity_stats_read_proc(char *page, char **start, off_t off,
-					int count, int *eof, void *data)
-{
-	int i;
-	int len;
-	char *p = page;
-
-	/* Only print if offset is 0, or we have enough buffer space */
-	if (off || count < (30 * BUCKET_MAX + 22))
-		return -ENOMEM;
-
-	len = snprintf(p, count, "Min Bucket(sec) Count\n");
-	count -= len;
-	p += len;
-
-	for (i = 0; i < BUCKET_MAX; i++) {
-		len = snprintf(p, count, "%15d %lu\n", 1 << i, activity_stats[i]);
-		count -= len;
-		p += len;
-	}
-	*eof = 1;
-
-	return p - page;
-}
-
-static int activity_stats_notifier(struct notifier_block *nb,
-					unsigned long event, void *dummy)
-{
-	switch (event) {
-		case PM_SUSPEND_PREPARE:
-			suspend_time = ktime_get_real();
-			break;
-
-		case PM_POST_SUSPEND:
-			suspend_time = ktime_sub(ktime_get_real(), suspend_time);
-			last_transmit = ktime_sub(last_transmit, suspend_time);
-	}
-
-	return 0;
-}
-
-static struct notifier_block activity_stats_notifier_block = {
-	.notifier_call = activity_stats_notifier,
-};
-
-static int  __init activity_stats_init(void)
-{
-	create_proc_read_entry("activity", S_IRUGO,
-			init_net.proc_net_stat, activity_stats_read_proc, NULL);
-	return register_pm_notifier(&activity_stats_notifier_block);
-}
-
-subsys_initcall(activity_stats_init);
-