10caa8cdfSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds * Data gathering module for Linux-VM Monitor Stream, Stage 1.
41da177e4SLinus Torvalds * Collects accumulated network statistics (Packets received/transmitted,
51da177e4SLinus Torvalds * dropped, errors, ...).
61da177e4SLinus Torvalds *
7a53c8fabSHeiko Carstens * Copyright IBM Corp. 2003, 2006
81da177e4SLinus Torvalds *
95b5dd21aSGerald Schaefer * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
101da177e4SLinus Torvalds */
111da177e4SLinus Torvalds
121da177e4SLinus Torvalds #include <linux/module.h>
131da177e4SLinus Torvalds #include <linux/init.h>
141da177e4SLinus Torvalds #include <linux/errno.h>
151da177e4SLinus Torvalds #include <linux/kernel_stat.h>
161da177e4SLinus Torvalds #include <linux/netdevice.h>
17881d966bSEric W. Biederman #include <net/net_namespace.h>
181da177e4SLinus Torvalds
191da177e4SLinus Torvalds #include "appldata.h"
201da177e4SLinus Torvalds
211da177e4SLinus Torvalds
221da177e4SLinus Torvalds /*
231da177e4SLinus Torvalds * Network data
241da177e4SLinus Torvalds *
251da177e4SLinus Torvalds * This is accessed as binary data by z/VM. If changes to it can't be avoided,
261da177e4SLinus Torvalds * the structure version (product ID, see appldata_base.c) needs to be changed
271da177e4SLinus Torvalds * as well and all documentation and z/VM applications using it must be updated.
281da177e4SLinus Torvalds */
292ab14619SSebastian Ott struct appldata_net_sum_data {
301da177e4SLinus Torvalds u64 timestamp;
311da177e4SLinus Torvalds u32 sync_count_1; /* after VM collected the record data, */
321da177e4SLinus Torvalds u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
331da177e4SLinus Torvalds same. If not, the record has been updated on
341da177e4SLinus Torvalds the Linux side while VM was collecting the
351da177e4SLinus Torvalds (possibly corrupt) data */
361da177e4SLinus Torvalds
371da177e4SLinus Torvalds u32 nr_interfaces; /* nr. of network interfaces being monitored */
381da177e4SLinus Torvalds
391da177e4SLinus Torvalds u32 padding; /* next value is 64-bit aligned, so these */
401da177e4SLinus Torvalds /* 4 byte would be padded out by compiler */
411da177e4SLinus Torvalds
421da177e4SLinus Torvalds u64 rx_packets; /* total packets received */
431da177e4SLinus Torvalds u64 tx_packets; /* total packets transmitted */
441da177e4SLinus Torvalds u64 rx_bytes; /* total bytes received */
451da177e4SLinus Torvalds u64 tx_bytes; /* total bytes transmitted */
461da177e4SLinus Torvalds u64 rx_errors; /* bad packets received */
471da177e4SLinus Torvalds u64 tx_errors; /* packet transmit problems */
481da177e4SLinus Torvalds u64 rx_dropped; /* no space in linux buffers */
491da177e4SLinus Torvalds u64 tx_dropped; /* no space available in linux */
501da177e4SLinus Torvalds u64 collisions; /* collisions while transmitting */
512ab14619SSebastian Ott } __packed;
521da177e4SLinus Torvalds
531da177e4SLinus Torvalds
541da177e4SLinus Torvalds /*
551da177e4SLinus Torvalds * appldata_get_net_sum_data()
561da177e4SLinus Torvalds *
571da177e4SLinus Torvalds * gather accumulated network statistics
581da177e4SLinus Torvalds */
appldata_get_net_sum_data(void * data)591da177e4SLinus Torvalds static void appldata_get_net_sum_data(void *data)
601da177e4SLinus Torvalds {
611da177e4SLinus Torvalds int i;
621da177e4SLinus Torvalds struct appldata_net_sum_data *net_data;
631da177e4SLinus Torvalds struct net_device *dev;
641da177e4SLinus Torvalds unsigned long rx_packets, tx_packets, rx_bytes, tx_bytes, rx_errors,
651da177e4SLinus Torvalds tx_errors, rx_dropped, tx_dropped, collisions;
661da177e4SLinus Torvalds
671da177e4SLinus Torvalds net_data = data;
681da177e4SLinus Torvalds net_data->sync_count_1++;
691da177e4SLinus Torvalds
701da177e4SLinus Torvalds i = 0;
711da177e4SLinus Torvalds rx_packets = 0;
721da177e4SLinus Torvalds tx_packets = 0;
731da177e4SLinus Torvalds rx_bytes = 0;
741da177e4SLinus Torvalds tx_bytes = 0;
751da177e4SLinus Torvalds rx_errors = 0;
761da177e4SLinus Torvalds tx_errors = 0;
771da177e4SLinus Torvalds rx_dropped = 0;
781da177e4SLinus Torvalds tx_dropped = 0;
791da177e4SLinus Torvalds collisions = 0;
80e576b9efSstephen hemminger
81e576b9efSstephen hemminger rcu_read_lock();
82e576b9efSstephen hemminger for_each_netdev_rcu(&init_net, dev) {
83e402e38cSHeiko Carstens const struct rtnl_link_stats64 *stats;
8428172739SEric Dumazet struct rtnl_link_stats64 temp;
85eeda3fd6SStephen Hemminger
86e402e38cSHeiko Carstens stats = dev_get_stats(dev, &temp);
871da177e4SLinus Torvalds rx_packets += stats->rx_packets;
881da177e4SLinus Torvalds tx_packets += stats->tx_packets;
891da177e4SLinus Torvalds rx_bytes += stats->rx_bytes;
901da177e4SLinus Torvalds tx_bytes += stats->tx_bytes;
911da177e4SLinus Torvalds rx_errors += stats->rx_errors;
921da177e4SLinus Torvalds tx_errors += stats->tx_errors;
931da177e4SLinus Torvalds rx_dropped += stats->rx_dropped;
941da177e4SLinus Torvalds tx_dropped += stats->tx_dropped;
951da177e4SLinus Torvalds collisions += stats->collisions;
961da177e4SLinus Torvalds i++;
971da177e4SLinus Torvalds }
98e576b9efSstephen hemminger rcu_read_unlock();
99e576b9efSstephen hemminger
1001da177e4SLinus Torvalds net_data->nr_interfaces = i;
1011da177e4SLinus Torvalds net_data->rx_packets = rx_packets;
1021da177e4SLinus Torvalds net_data->tx_packets = tx_packets;
1031da177e4SLinus Torvalds net_data->rx_bytes = rx_bytes;
1041da177e4SLinus Torvalds net_data->tx_bytes = tx_bytes;
1051da177e4SLinus Torvalds net_data->rx_errors = rx_errors;
1061da177e4SLinus Torvalds net_data->tx_errors = tx_errors;
1071da177e4SLinus Torvalds net_data->rx_dropped = rx_dropped;
1081da177e4SLinus Torvalds net_data->tx_dropped = tx_dropped;
1091da177e4SLinus Torvalds net_data->collisions = collisions;
1101da177e4SLinus Torvalds
1111aae0560SHeiko Carstens net_data->timestamp = get_tod_clock();
1121da177e4SLinus Torvalds net_data->sync_count_2++;
1131da177e4SLinus Torvalds }
1141da177e4SLinus Torvalds
1151da177e4SLinus Torvalds
1161da177e4SLinus Torvalds static struct appldata_ops ops = {
1171da177e4SLinus Torvalds .name = "net_sum",
1181da177e4SLinus Torvalds .record_nr = APPLDATA_RECORD_NET_SUM_ID,
1191da177e4SLinus Torvalds .size = sizeof(struct appldata_net_sum_data),
1201da177e4SLinus Torvalds .callback = &appldata_get_net_sum_data,
1211da177e4SLinus Torvalds .owner = THIS_MODULE,
1225b5dd21aSGerald Schaefer .mod_lvl = {0xF0, 0xF0}, /* EBCDIC "00" */
1231da177e4SLinus Torvalds };
1241da177e4SLinus Torvalds
1251da177e4SLinus Torvalds
1261da177e4SLinus Torvalds /*
1271da177e4SLinus Torvalds * appldata_net_init()
1281da177e4SLinus Torvalds *
1291da177e4SLinus Torvalds * init data, register ops
1301da177e4SLinus Torvalds */
appldata_net_init(void)1311da177e4SLinus Torvalds static int __init appldata_net_init(void)
1321da177e4SLinus Torvalds {
1332ab14619SSebastian Ott int ret;
1342ab14619SSebastian Ott
1352ab14619SSebastian Ott ops.data = kzalloc(sizeof(struct appldata_net_sum_data), GFP_KERNEL);
1362ab14619SSebastian Ott if (!ops.data)
1372ab14619SSebastian Ott return -ENOMEM;
1382ab14619SSebastian Ott
1392ab14619SSebastian Ott ret = appldata_register_ops(&ops);
1402ab14619SSebastian Ott if (ret)
1412ab14619SSebastian Ott kfree(ops.data);
1422ab14619SSebastian Ott
1432ab14619SSebastian Ott return ret;
1441da177e4SLinus Torvalds }
1451da177e4SLinus Torvalds
1461da177e4SLinus Torvalds /*
1471da177e4SLinus Torvalds * appldata_net_exit()
1481da177e4SLinus Torvalds *
1491da177e4SLinus Torvalds * unregister ops
1501da177e4SLinus Torvalds */
appldata_net_exit(void)1511da177e4SLinus Torvalds static void __exit appldata_net_exit(void)
1521da177e4SLinus Torvalds {
1531da177e4SLinus Torvalds appldata_unregister_ops(&ops);
1542ab14619SSebastian Ott kfree(ops.data);
1551da177e4SLinus Torvalds }
1561da177e4SLinus Torvalds
1571da177e4SLinus Torvalds
1581da177e4SLinus Torvalds module_init(appldata_net_init);
1591da177e4SLinus Torvalds module_exit(appldata_net_exit);
1601da177e4SLinus Torvalds
1611da177e4SLinus Torvalds MODULE_LICENSE("GPL");
1621da177e4SLinus Torvalds MODULE_AUTHOR("Gerald Schaefer");
1631da177e4SLinus Torvalds MODULE_DESCRIPTION("Linux-VM Monitor Stream, accumulated network statistics");
164