From 78a2dce1100b2520ac881f5e7a0f9dad9d250b2c Mon Sep 17 00:00:00 2001 From: Mike Chan Date: Wed, 7 Jan 2009 11:40:42 -0800 Subject: misc: uidstat: Adding uid stat driver to collect network statistics. Signed-off-by: Mike Chan --- drivers/misc/uid_stat.c | 153 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 drivers/misc/uid_stat.c (limited to 'drivers/misc/uid_stat.c') diff --git a/drivers/misc/uid_stat.c b/drivers/misc/uid_stat.c new file mode 100644 index 000000000000..e6760b56083c --- /dev/null +++ b/drivers/misc/uid_stat.c @@ -0,0 +1,153 @@ +/* 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 + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +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); -- cgit v1.2.3 From 679991fec3ae301005d0270149b007ebf8a9aba6 Mon Sep 17 00:00:00 2001 From: Mike Chan Date: Fri, 28 May 2010 14:32:19 -0700 Subject: net: activity_stats: Add statistics for network transmission activity When enabled, tracks the frequency of network transmissions (inbound and outbound) and buckets them accordingly. Buckets are determined by time between network activity. Each bucket represents the number of network transmisions that were N sec or longer apart. Where N is defined as 1 << bucket index. This network pattern tracking is particularly useful for wireless networks (ie: 3G) where batching network activity closely together is more power efficient than far apart. New file: /proc/net/stat/activity output: Min Bucket(sec) Count 1 7 2 0 4 1 8 0 16 0 32 2 64 1 128 0 Change-Id: I4c4cd8627b872a55f326b1715c51bc3bdd6e8d92 Signed-off-by: Mike Chan --- drivers/misc/uid_stat.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/misc/uid_stat.c') diff --git a/drivers/misc/uid_stat.c b/drivers/misc/uid_stat.c index e6760b56083c..2141124a6c12 100644 --- a/drivers/misc/uid_stat.c +++ b/drivers/misc/uid_stat.c @@ -24,6 +24,7 @@ #include #include #include +#include static DEFINE_SPINLOCK(uid_lock); static LIST_HEAD(uid_list); @@ -122,6 +123,7 @@ 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; @@ -132,6 +134,7 @@ 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; -- cgit v1.2.3