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The source code base needs to be adapted as well. Some files include virutil.h just for the string related functions (here, the include is substituted to match the new file), some include virutil.h without any need (here, the include is removed), and some require both.
122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/*
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* virstatslinux.c: Linux block and network stats.
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*
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* Copyright (C) 2007-2010 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Richard W.M. Jones <rjones@redhat.com>
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*/
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#include <config.h>
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/* This file only applies on Linux. */
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#ifdef __linux__
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# include <stdio.h>
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# include <stdlib.h>
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# include <fcntl.h>
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# include <string.h>
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# include <unistd.h>
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# include <regex.h>
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# include "virerror.h"
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# include "datatypes.h"
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# include "virstatslinux.h"
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# include "viralloc.h"
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# include "virfile.h"
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# define VIR_FROM_THIS VIR_FROM_STATS_LINUX
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/*-------------------- interface stats --------------------*/
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/* Just reads the named interface, so not Xen or QEMU-specific.
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* NB. Caller must check that libvirt user is trying to query
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* the interface of a domain they own. We do no such checking.
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*/
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int
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linuxDomainInterfaceStats(const char *path,
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struct _virDomainInterfaceStats *stats)
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{
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int path_len;
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FILE *fp;
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char line[256], *colon;
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fp = fopen("/proc/net/dev", "r");
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if (!fp) {
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virReportSystemError(errno, "%s",
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_("Could not open /proc/net/dev"));
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return -1;
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}
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path_len = strlen(path);
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while (fgets(line, sizeof(line), fp)) {
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long long dummy;
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long long rx_bytes;
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long long rx_packets;
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long long rx_errs;
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long long rx_drop;
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long long tx_bytes;
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long long tx_packets;
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long long tx_errs;
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long long tx_drop;
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/* The line looks like:
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* " eth0:..."
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* Split it at the colon.
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*/
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colon = strchr(line, ':');
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if (!colon) continue;
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*colon = '\0';
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if (colon-path_len >= line &&
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STREQ(colon-path_len, path)) {
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/* IMPORTANT NOTE!
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* /proc/net/dev vif<domid>.nn sees the network from the point
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* of view of dom0 / hypervisor. So bytes TRANSMITTED by dom0
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* are bytes RECEIVED by the domain. That's why the TX/RX fields
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* appear to be swapped here.
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*/
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if (sscanf(colon+1,
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"%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
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&tx_bytes, &tx_packets, &tx_errs, &tx_drop,
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&dummy, &dummy, &dummy, &dummy,
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&rx_bytes, &rx_packets, &rx_errs, &rx_drop,
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&dummy, &dummy, &dummy, &dummy) != 16)
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continue;
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stats->rx_bytes = rx_bytes;
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stats->rx_packets = rx_packets;
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stats->rx_errs = rx_errs;
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stats->rx_drop = rx_drop;
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stats->tx_bytes = tx_bytes;
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stats->tx_packets = tx_packets;
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stats->tx_errs = tx_errs;
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stats->tx_drop = tx_drop;
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VIR_FORCE_FCLOSE(fp);
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return 0;
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}
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}
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VIR_FORCE_FCLOSE(fp);
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("/proc/net/dev: Interface not found"));
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return -1;
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}
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#endif /* __linux__ */
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