a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/*
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* Data gathering module for Linux-VM Monitor Stream, Stage 1.
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* Collects accumulated network statistics (Packets received/transmitted,
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* dropped, errors, ...).
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*
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* Copyright IBM Corp. 2003, 2006
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*
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* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/kernel_stat.h>
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#include <linux/netdevice.h>
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#include <net/net_namespace.h>
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#include "appldata.h"
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/*
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* Network data
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*
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* This is accessed as binary data by z/VM. If changes to it can't be avoided,
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* the structure version (product ID, see appldata_base.c) needs to be changed
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* as well and all documentation and z/VM applications using it must be updated.
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*
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* The record layout is documented in the Linux for zSeries Device Drivers
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* book:
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* http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
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*/
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static struct appldata_net_sum_data {
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u64 timestamp;
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u32 sync_count_1; /* after VM collected the record data, */
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u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
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same. If not, the record has been updated on
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the Linux side while VM was collecting the
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(possibly corrupt) data */
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u32 nr_interfaces; /* nr. of network interfaces being monitored */
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u32 padding; /* next value is 64-bit aligned, so these */
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/* 4 byte would be padded out by compiler */
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u64 rx_packets; /* total packets received */
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u64 tx_packets; /* total packets transmitted */
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u64 rx_bytes; /* total bytes received */
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u64 tx_bytes; /* total bytes transmitted */
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u64 rx_errors; /* bad packets received */
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u64 tx_errors; /* packet transmit problems */
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u64 rx_dropped; /* no space in linux buffers */
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u64 tx_dropped; /* no space available in linux */
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u64 collisions; /* collisions while transmitting */
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} __attribute__((packed)) appldata_net_sum_data;
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/*
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* appldata_get_net_sum_data()
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*
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* gather accumulated network statistics
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*/
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static void appldata_get_net_sum_data(void *data)
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{
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int i;
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struct appldata_net_sum_data *net_data;
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struct net_device *dev;
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unsigned long rx_packets, tx_packets, rx_bytes, tx_bytes, rx_errors,
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tx_errors, rx_dropped, tx_dropped, collisions;
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net_data = data;
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net_data->sync_count_1++;
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i = 0;
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rx_packets = 0;
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tx_packets = 0;
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rx_bytes = 0;
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tx_bytes = 0;
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rx_errors = 0;
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tx_errors = 0;
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rx_dropped = 0;
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tx_dropped = 0;
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collisions = 0;
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rcu_read_lock();
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for_each_netdev_rcu(&init_net, dev) {
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const struct rtnl_link_stats64 *stats;
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struct rtnl_link_stats64 temp;
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stats = dev_get_stats(dev, &temp);
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rx_packets += stats->rx_packets;
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tx_packets += stats->tx_packets;
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rx_bytes += stats->rx_bytes;
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tx_bytes += stats->tx_bytes;
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rx_errors += stats->rx_errors;
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tx_errors += stats->tx_errors;
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rx_dropped += stats->rx_dropped;
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tx_dropped += stats->tx_dropped;
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collisions += stats->collisions;
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i++;
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}
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rcu_read_unlock();
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net_data->nr_interfaces = i;
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net_data->rx_packets = rx_packets;
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net_data->tx_packets = tx_packets;
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net_data->rx_bytes = rx_bytes;
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net_data->tx_bytes = tx_bytes;
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net_data->rx_errors = rx_errors;
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net_data->tx_errors = tx_errors;
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net_data->rx_dropped = rx_dropped;
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net_data->tx_dropped = tx_dropped;
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net_data->collisions = collisions;
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net_data->timestamp = get_clock();
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net_data->sync_count_2++;
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}
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static struct appldata_ops ops = {
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.name = "net_sum",
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.record_nr = APPLDATA_RECORD_NET_SUM_ID,
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.size = sizeof(struct appldata_net_sum_data),
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.callback = &appldata_get_net_sum_data,
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.data = &appldata_net_sum_data,
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.owner = THIS_MODULE,
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.mod_lvl = {0xF0, 0xF0}, /* EBCDIC "00" */
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};
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/*
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* appldata_net_init()
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*
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* init data, register ops
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*/
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static int __init appldata_net_init(void)
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{
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return appldata_register_ops(&ops);
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}
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/*
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* appldata_net_exit()
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*
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* unregister ops
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*/
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static void __exit appldata_net_exit(void)
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{
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appldata_unregister_ops(&ops);
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}
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module_init(appldata_net_init);
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module_exit(appldata_net_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Gerald Schaefer");
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MODULE_DESCRIPTION("Linux-VM Monitor Stream, accumulated network statistics");
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