linux/arch/s390/appldata/appldata_net_sum.c
Greg Kroah-Hartman 0caa8cdf1a s390: appldata: add SPDX identifiers to the remaining files
It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the arch/s390/appldata/ files with the correct SPDX license
identifier based on the license text in the file itself.  The SPDX
identifier is a legally binding shorthand, which can be used instead of
the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-11-24 15:37:18 +01:00

168 lines
4.2 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Data gathering module for Linux-VM Monitor Stream, Stage 1.
* Collects accumulated network statistics (Packets received/transmitted,
* dropped, errors, ...).
*
* Copyright IBM Corp. 2003, 2006
*
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kernel_stat.h>
#include <linux/netdevice.h>
#include <net/net_namespace.h>
#include "appldata.h"
/*
* Network data
*
* This is accessed as binary data by z/VM. If changes to it can't be avoided,
* the structure version (product ID, see appldata_base.c) needs to be changed
* as well and all documentation and z/VM applications using it must be updated.
*
* The record layout is documented in the Linux for zSeries Device Drivers
* book:
* http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
*/
struct appldata_net_sum_data {
u64 timestamp;
u32 sync_count_1; /* after VM collected the record data, */
u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
same. If not, the record has been updated on
the Linux side while VM was collecting the
(possibly corrupt) data */
u32 nr_interfaces; /* nr. of network interfaces being monitored */
u32 padding; /* next value is 64-bit aligned, so these */
/* 4 byte would be padded out by compiler */
u64 rx_packets; /* total packets received */
u64 tx_packets; /* total packets transmitted */
u64 rx_bytes; /* total bytes received */
u64 tx_bytes; /* total bytes transmitted */
u64 rx_errors; /* bad packets received */
u64 tx_errors; /* packet transmit problems */
u64 rx_dropped; /* no space in linux buffers */
u64 tx_dropped; /* no space available in linux */
u64 collisions; /* collisions while transmitting */
} __packed;
/*
* appldata_get_net_sum_data()
*
* gather accumulated network statistics
*/
static void appldata_get_net_sum_data(void *data)
{
int i;
struct appldata_net_sum_data *net_data;
struct net_device *dev;
unsigned long rx_packets, tx_packets, rx_bytes, tx_bytes, rx_errors,
tx_errors, rx_dropped, tx_dropped, collisions;
net_data = data;
net_data->sync_count_1++;
i = 0;
rx_packets = 0;
tx_packets = 0;
rx_bytes = 0;
tx_bytes = 0;
rx_errors = 0;
tx_errors = 0;
rx_dropped = 0;
tx_dropped = 0;
collisions = 0;
rcu_read_lock();
for_each_netdev_rcu(&init_net, dev) {
const struct rtnl_link_stats64 *stats;
struct rtnl_link_stats64 temp;
stats = dev_get_stats(dev, &temp);
rx_packets += stats->rx_packets;
tx_packets += stats->tx_packets;
rx_bytes += stats->rx_bytes;
tx_bytes += stats->tx_bytes;
rx_errors += stats->rx_errors;
tx_errors += stats->tx_errors;
rx_dropped += stats->rx_dropped;
tx_dropped += stats->tx_dropped;
collisions += stats->collisions;
i++;
}
rcu_read_unlock();
net_data->nr_interfaces = i;
net_data->rx_packets = rx_packets;
net_data->tx_packets = tx_packets;
net_data->rx_bytes = rx_bytes;
net_data->tx_bytes = tx_bytes;
net_data->rx_errors = rx_errors;
net_data->tx_errors = tx_errors;
net_data->rx_dropped = rx_dropped;
net_data->tx_dropped = tx_dropped;
net_data->collisions = collisions;
net_data->timestamp = get_tod_clock();
net_data->sync_count_2++;
}
static struct appldata_ops ops = {
.name = "net_sum",
.record_nr = APPLDATA_RECORD_NET_SUM_ID,
.size = sizeof(struct appldata_net_sum_data),
.callback = &appldata_get_net_sum_data,
.owner = THIS_MODULE,
.mod_lvl = {0xF0, 0xF0}, /* EBCDIC "00" */
};
/*
* appldata_net_init()
*
* init data, register ops
*/
static int __init appldata_net_init(void)
{
int ret;
ops.data = kzalloc(sizeof(struct appldata_net_sum_data), GFP_KERNEL);
if (!ops.data)
return -ENOMEM;
ret = appldata_register_ops(&ops);
if (ret)
kfree(ops.data);
return ret;
}
/*
* appldata_net_exit()
*
* unregister ops
*/
static void __exit appldata_net_exit(void)
{
appldata_unregister_ops(&ops);
kfree(ops.data);
}
module_init(appldata_net_init);
module_exit(appldata_net_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Gerald Schaefer");
MODULE_DESCRIPTION("Linux-VM Monitor Stream, accumulated network statistics");