mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-11-02 11:21:12 +00:00
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
/*
|
|
* Linux block and network stats.
|
|
*
|
|
* Copyright (C) 2007-2010 Red Hat, Inc.
|
|
*
|
|
* See COPYING.LIB for the License of this software
|
|
*
|
|
* Richard W.M. Jones <rjones@redhat.com>
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
/* This file only applies on Linux. */
|
|
#ifdef __linux__
|
|
|
|
# include <stdio.h>
|
|
# include <stdlib.h>
|
|
# include <fcntl.h>
|
|
# include <string.h>
|
|
# include <unistd.h>
|
|
# include <regex.h>
|
|
|
|
# include "virterror_internal.h"
|
|
# include "datatypes.h"
|
|
# include "util.h"
|
|
# include "stats_linux.h"
|
|
# include "memory.h"
|
|
# include "files.h"
|
|
|
|
# define VIR_FROM_THIS VIR_FROM_STATS_LINUX
|
|
|
|
# define virStatsError(code, ...) \
|
|
virReportErrorHelper(VIR_FROM_THIS, code, __FILE__, \
|
|
__FUNCTION__, __LINE__, __VA_ARGS__)
|
|
|
|
|
|
/*-------------------- interface stats --------------------*/
|
|
/* Just reads the named interface, so not Xen or QEMU-specific.
|
|
* NB. Caller must check that libvirt user is trying to query
|
|
* the interface of a domain they own. We do no such checking.
|
|
*/
|
|
|
|
int
|
|
linuxDomainInterfaceStats(const char *path,
|
|
struct _virDomainInterfaceStats *stats)
|
|
{
|
|
int path_len;
|
|
FILE *fp;
|
|
char line[256], *colon;
|
|
|
|
fp = fopen ("/proc/net/dev", "r");
|
|
if (!fp) {
|
|
virReportSystemError(errno, "%s",
|
|
_("Could not open /proc/net/dev"));
|
|
return -1;
|
|
}
|
|
|
|
path_len = strlen (path);
|
|
|
|
while (fgets (line, sizeof line, fp)) {
|
|
long long dummy;
|
|
long long rx_bytes;
|
|
long long rx_packets;
|
|
long long rx_errs;
|
|
long long rx_drop;
|
|
long long tx_bytes;
|
|
long long tx_packets;
|
|
long long tx_errs;
|
|
long long tx_drop;
|
|
|
|
/* The line looks like:
|
|
* " eth0:..."
|
|
* Split it at the colon.
|
|
*/
|
|
colon = strchr (line, ':');
|
|
if (!colon) continue;
|
|
*colon = '\0';
|
|
if (colon-path_len >= line &&
|
|
STREQ (colon-path_len, path)) {
|
|
/* IMPORTANT NOTE!
|
|
* /proc/net/dev vif<domid>.nn sees the network from the point
|
|
* of view of dom0 / hypervisor. So bytes TRANSMITTED by dom0
|
|
* are bytes RECEIVED by the domain. That's why the TX/RX fields
|
|
* appear to be swapped here.
|
|
*/
|
|
if (sscanf (colon+1,
|
|
"%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
|
|
&tx_bytes, &tx_packets, &tx_errs, &tx_drop,
|
|
&dummy, &dummy, &dummy, &dummy,
|
|
&rx_bytes, &rx_packets, &rx_errs, &rx_drop,
|
|
&dummy, &dummy, &dummy, &dummy) != 16)
|
|
continue;
|
|
|
|
stats->rx_bytes = rx_bytes;
|
|
stats->rx_packets = rx_packets;
|
|
stats->rx_errs = rx_errs;
|
|
stats->rx_drop = rx_drop;
|
|
stats->tx_bytes = tx_bytes;
|
|
stats->tx_packets = tx_packets;
|
|
stats->tx_errs = tx_errs;
|
|
stats->tx_drop = tx_drop;
|
|
VIR_FORCE_FCLOSE (fp);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
VIR_FORCE_FCLOSE(fp);
|
|
|
|
virStatsError(VIR_ERR_INTERNAL_ERROR,
|
|
_("/proc/net/dev: Interface not found"));
|
|
return -1;
|
|
}
|
|
|
|
#endif /* __linux__ */
|