diff options
Diffstat (limited to 'arch/s390/appldata/appldata_net_sum.c')
| -rw-r--r-- | arch/s390/appldata/appldata_net_sum.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/arch/s390/appldata/appldata_net_sum.c b/arch/s390/appldata/appldata_net_sum.c new file mode 100644 index 000000000000..dd61638d3027 --- /dev/null +++ b/arch/s390/appldata/appldata_net_sum.c @@ -0,0 +1,195 @@ +/* + * 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 IBM Corporation, IBM Deutschland Entwicklung GmbH. + * + * Author: Gerald Schaefer <geraldsc@de.ibm.com> + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/kernel_stat.h> +#include <linux/netdevice.h> + +#include "appldata.h" + + +#define MY_PRINT_NAME "appldata_net_sum" /* for debug messages, etc. */ + + +/* + * 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 */ +} appldata_net_sum_data; + + +static inline void appldata_print_debug(struct appldata_net_sum_data *net_data) +{ + P_DEBUG("--- NET - RECORD ---\n"); + + P_DEBUG("nr_interfaces = %u\n", net_data->nr_interfaces); + P_DEBUG("rx_packets = %8lu\n", net_data->rx_packets); + P_DEBUG("tx_packets = %8lu\n", net_data->tx_packets); + P_DEBUG("rx_bytes = %8lu\n", net_data->rx_bytes); + P_DEBUG("tx_bytes = %8lu\n", net_data->tx_bytes); + P_DEBUG("rx_errors = %8lu\n", net_data->rx_errors); + P_DEBUG("tx_errors = %8lu\n", net_data->tx_errors); + P_DEBUG("rx_dropped = %8lu\n", net_data->rx_dropped); + P_DEBUG("tx_dropped = %8lu\n", net_data->tx_dropped); + P_DEBUG("collisions = %8lu\n", net_data->collisions); + + P_DEBUG("sync_count_1 = %u\n", net_data->sync_count_1); + P_DEBUG("sync_count_2 = %u\n", net_data->sync_count_2); + P_DEBUG("timestamp = %lX\n", net_data->timestamp); +} + +/* + * 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; + struct net_device_stats *stats; + 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; + read_lock(&dev_base_lock); + for (dev = dev_base; dev != NULL; dev = dev->next) { + if (dev->get_stats == NULL) { + continue; + } + stats = dev->get_stats(dev); + 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++; + } + read_unlock(&dev_base_lock); + 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++; +#ifdef APPLDATA_DEBUG + appldata_print_debug(net_data); +#endif +} + + +static struct appldata_ops ops = { + .ctl_nr = CTL_APPLDATA_NET_SUM, + .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, +}; + + +/* + * appldata_net_init() + * + * init data, register ops + */ +static int __init appldata_net_init(void) +{ + int rc; + + P_DEBUG("sizeof(net) = %lu\n", sizeof(struct appldata_net_sum_data)); + + rc = appldata_register_ops(&ops); + if (rc != 0) { + P_ERROR("Error registering ops, rc = %i\n", rc); + } else { + P_DEBUG("%s-ops registered!\n", ops.name); + } + return rc; +} + +/* + * appldata_net_exit() + * + * unregister ops + */ +static void __exit appldata_net_exit(void) +{ + appldata_unregister_ops(&ops); + P_DEBUG("%s-ops unregistered!\n", ops.name); +} + + +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"); |