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f6d4405e3c
This removes nearly all the per-file error reporting macros from the code in src/util/. A few custom macros remain for the case, where the file needs to report errors with a variety of different codes or parameters Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* 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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* See COPYING.LIB for the License of this software
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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 "virterror_internal.h"
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# include "datatypes.h"
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# include "util.h"
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# include "stats_linux.h"
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# include "memory.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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