Revert "misc: uidstat: Adding uid stat driver to collect network statistics."

This reverts commit 6b6d5fbf9ae567aefb58099a30bbb6d25fa8925b.

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

1 files changed, 0 insertions, 153 deletions

diff --git a/drivers/misc/uid_stat.c b/drivers/misc/uid_stat.c
deleted file mode 100644
index e6760b56083c..000000000000
--- a/drivers/misc/uid_stat.c
+++ /dev/null
@@ -1,153 +0,0 @@
-/* drivers/misc/uid_stat.c
- *
- * Copyright (C) 2008 - 2009 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.
- *
- */
-
-#include <asm/atomic.h>
-
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/stat.h>
-#include <linux/uid_stat.h>
-
-static DEFINE_SPINLOCK(uid_lock);
-static LIST_HEAD(uid_list);
-static struct proc_dir_entry *parent;
-
-struct uid_stat {
-	struct list_head link;
-	uid_t uid;
-	atomic_t tcp_rcv;
-	atomic_t tcp_snd;
-};
-
-static struct uid_stat *find_uid_stat(uid_t uid) {
-	unsigned long flags;
-	struct uid_stat *entry;
-
-	spin_lock_irqsave(&uid_lock, flags);
-	list_for_each_entry(entry, &uid_list, link) {
-		if (entry->uid == uid) {
-			spin_unlock_irqrestore(&uid_lock, flags);
-			return entry;
-		}
-	}
-	spin_unlock_irqrestore(&uid_lock, flags);
-	return NULL;
-}
-
-static int tcp_snd_read_proc(char *page, char **start, off_t off,
-				int count, int *eof, void *data)
-{
-	int len;
-	unsigned int bytes;
-	char *p = page;
-	struct uid_stat *uid_entry = (struct uid_stat *) data;
-	if (!data)
-		return 0;
-
-	bytes = (unsigned int) (atomic_read(&uid_entry->tcp_snd) + INT_MIN);
-	p += sprintf(p, "%u\n", bytes);
-	len = (p - page) - off;
-	*eof = (len <= count) ? 1 : 0;
-	*start = page + off;
-	return len;
-}
-
-static int tcp_rcv_read_proc(char *page, char **start, off_t off,
-				int count, int *eof, void *data)
-{
-	int len;
-	unsigned int bytes;
-	char *p = page;
-	struct uid_stat *uid_entry = (struct uid_stat *) data;
-	if (!data)
-		return 0;
-
-	bytes = (unsigned int) (atomic_read(&uid_entry->tcp_rcv) + INT_MIN);
-	p += sprintf(p, "%u\n", bytes);
-	len = (p - page) - off;
-	*eof = (len <= count) ? 1 : 0;
-	*start = page + off;
-	return len;
-}
-
-/* Create a new entry for tracking the specified uid. */
-static struct uid_stat *create_stat(uid_t uid) {
-	unsigned long flags;
-	char uid_s[32];
-	struct uid_stat *new_uid;
-	struct proc_dir_entry *entry;
-
-	/* Create the uid stat struct and append it to the list. */
-	if ((new_uid = kmalloc(sizeof(struct uid_stat), GFP_KERNEL)) == NULL)
-		return NULL;
-
-	new_uid->uid = uid;
-	/* Counters start at INT_MIN, so we can track 4GB of network traffic. */
-	atomic_set(&new_uid->tcp_rcv, INT_MIN);
-	atomic_set(&new_uid->tcp_snd, INT_MIN);
-
-	spin_lock_irqsave(&uid_lock, flags);
-	list_add_tail(&new_uid->link, &uid_list);
-	spin_unlock_irqrestore(&uid_lock, flags);
-
-	sprintf(uid_s, "%d", uid);
-	entry = proc_mkdir(uid_s, parent);
-
-	/* Keep reference to uid_stat so we know what uid to read stats from. */
-	create_proc_read_entry("tcp_snd", S_IRUGO, entry , tcp_snd_read_proc,
-		(void *) new_uid);
-
-	create_proc_read_entry("tcp_rcv", S_IRUGO, entry, tcp_rcv_read_proc,
-		(void *) new_uid);
-
-	return new_uid;
-}
-
-int uid_stat_tcp_snd(uid_t uid, int size) {
-	struct uid_stat *entry;
-	if ((entry = find_uid_stat(uid)) == NULL &&
-		((entry = create_stat(uid)) == NULL)) {
-			return -1;
-	}
-	atomic_add(size, &entry->tcp_snd);
-	return 0;
-}
-
-int uid_stat_tcp_rcv(uid_t uid, int size) {
-	struct uid_stat *entry;
-	if ((entry = find_uid_stat(uid)) == NULL &&
-		((entry = create_stat(uid)) == NULL)) {
-			return -1;
-	}
-	atomic_add(size, &entry->tcp_rcv);
-	return 0;
-}
-
-static int __init uid_stat_init(void)
-{
-	parent = proc_mkdir("uid_stat", NULL);
-	if (!parent) {
-		pr_err("uid_stat: failed to create proc entry\n");
-		return -1;
-	}
-	return 0;
-}
-
-__initcall(uid_stat_init);