libvirt/src/util/virstats.c
Wang Yufei ac64cc1016 maint: clean up _virDomainInterfaceStats
Clean up all _virDomainInterfaceStats.

Signed-off-by: Wang Yufei <james.wangyufei@huawei.com>
Signed-off-by: Wang Rui <moon.wangrui@huawei.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
2014-09-17 11:28:48 -06:00

179 lines
5.2 KiB
C

/*
* virstats.c: Block and network stats.
*
* Copyright (C) 2007-2010, 2014 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Richard W.M. Jones <rjones@redhat.com>
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <regex.h>
#if defined(HAVE_GETIFADDRS) && defined(AF_LINK)
# include <net/if.h>
# include <ifaddrs.h>
#endif
#include "virerror.h"
#include "datatypes.h"
#include "virstats.h"
#include "viralloc.h"
#include "virfile.h"
#define VIR_FROM_THIS VIR_FROM_STATS_LINUX
/*-------------------- 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.
*/
#ifdef __linux__
int
virNetInterfaceStats(const char *path,
virDomainInterfaceStatsPtr 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);
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("/proc/net/dev: Interface not found"));
return -1;
}
#elif defined(HAVE_GETIFADDRS) && defined(AF_LINK)
int
virNetInterfaceStats(const char *path,
virDomainInterfaceStatsPtr stats)
{
struct ifaddrs *ifap, *ifa;
struct if_data *ifd;
int ret = -1;
if (getifaddrs(&ifap) < 0) {
virReportSystemError(errno, "%s",
_("Could not get interface list"));
return -1;
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != AF_LINK)
continue;
if (STREQ(ifa->ifa_name, path)) {
ifd = (struct if_data *)ifa->ifa_data;
stats->tx_bytes = ifd->ifi_ibytes;
stats->tx_packets = ifd->ifi_ipackets;
stats->tx_errs = ifd->ifi_ierrors;
stats->tx_drop = ifd->ifi_iqdrops;
stats->rx_bytes = ifd->ifi_obytes;
stats->rx_packets = ifd->ifi_opackets;
stats->rx_errs = ifd->ifi_oerrors;
# ifdef HAVE_STRUCT_IF_DATA_IFI_OQDROPS
stats->rx_drop = ifd->ifi_oqdrops;
# else
stats->rx_drop = 0;
# endif
ret = 0;
break;
}
}
if (ret < 0)
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Interface not found"));
freeifaddrs(ifap);
return ret;
}
#else
int
virNetInterfaceStats(const char *path ATTRIBUTE_UNUSED,
virDomainInterfaceStatsPtr stats ATTRIBUTE_UNUSED)
{
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("interface stats not implemented on this platform"));
return -1;
}
#endif /* __linux__ */