/* * arch/s390/appldata/appldata_net_sum.c * * Data gathering module for Linux-VM Monitor Stream, Stage 1. * Collects accumulated network statistics (Packets received/transmitted, * dropped, errors, ...). * * Copyright (C) 2003,2006 IBM Corporation, IBM Deutschland Entwicklung GmbH. * * Author: Gerald Schaefer */ #include #include #include #include #include #include #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 */ static 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 */ } __attribute__((packed)) appldata_net_sum_data; /* * 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) { struct rtnl_link_stats64 temp; const struct net_device_stats *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_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, .data = &appldata_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) { return appldata_register_ops(&ops); } /* * appldata_net_exit() * * unregister ops */ static void __exit appldata_net_exit(void) { appldata_unregister_ops(&ops); } 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");