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From 105dace22cc7b5b18d72a4dcad4a2cf386ce5c99 Mon Sep 17 00:00:00 2001
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From: Michal Privoznik <mprivozn@redhat.com>
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Date: Tue, 18 Jan 2022 12:40:09 +0100
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Subject: [PATCH] Revert "report error when virProcessGetStatInfo() is unable
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to parse data"
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This reverts commit 938382b60ae5bd1f83b5cb09e1ce68b9a88f679a.
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Turns out, the commit did more harm than good. It changed
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semantics on some public APIs. For instance, while
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qemuDomainGetInfo() previously did not returned an error it does
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now. While the calls to virProcessGetStatInfo() is guarded with
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virDomainObjIsActive() it doesn't necessarily mean that QEMU's
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PID is still alive. QEMU might be gone but we just haven't
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realized it (e.g. because the eof handler thread is waiting for a
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job).
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2041610
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Andrea Bolognani <abologna@redhat.com>
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---
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src/ch/ch_driver.c | 2 ++
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src/qemu/qemu_driver.c | 7 ++++++-
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src/util/virprocess.c | 8 ++------
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3 files changed, 10 insertions(+), 7 deletions(-)
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diff --git a/src/ch/ch_driver.c b/src/ch/ch_driver.c
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index 3cbc668489..53e0872207 100644
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--- a/src/ch/ch_driver.c
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+++ b/src/ch/ch_driver.c
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@@ -1073,6 +1073,8 @@ chDomainHelperGetVcpus(virDomainObj *vm,
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if (virProcessGetStatInfo(&vcpuinfo->cpuTime,
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&vcpuinfo->cpu, NULL,
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vm->pid, vcpupid) < 0) {
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+ virReportSystemError(errno, "%s",
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+ _("cannot get vCPU placement & pCPU time"));
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return -1;
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}
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}
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diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
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index 83cc7a04ea..0a1ba74e65 100644
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--- a/src/qemu/qemu_driver.c
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+++ b/src/qemu/qemu_driver.c
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@@ -1354,6 +1354,8 @@ qemuDomainHelperGetVcpus(virDomainObj *vm,
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if (virProcessGetStatInfo(&vcpuinfo->cpuTime,
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&vcpuinfo->cpu, NULL,
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vm->pid, vcpupid) < 0) {
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+ virReportSystemError(errno, "%s",
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+ _("cannot get vCPU placement & pCPU time"));
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return -1;
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}
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}
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@@ -2514,6 +2516,8 @@ qemuDomainGetInfo(virDomainPtr dom,
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if (virDomainObjIsActive(vm)) {
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if (virProcessGetStatInfo(&(info->cpuTime), NULL, NULL,
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vm->pid, 0) < 0) {
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+ virReportError(VIR_ERR_OPERATION_FAILED, "%s",
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+ _("cannot read cputime for domain"));
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goto cleanup;
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}
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}
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@@ -10513,7 +10517,8 @@ qemuDomainMemoryStatsInternal(virQEMUDriver *driver,
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}
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if (virProcessGetStatInfo(NULL, NULL, &rss, vm->pid, 0) < 0) {
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- virResetLastError();
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+ virReportError(VIR_ERR_OPERATION_FAILED, "%s",
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+ _("cannot get RSS for domain"));
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} else {
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stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_RSS;
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stats[ret].val = rss;
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diff --git a/src/util/virprocess.c b/src/util/virprocess.c
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index 85d8c8e747..b559a4257e 100644
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--- a/src/util/virprocess.c
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+++ b/src/util/virprocess.c
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@@ -1784,10 +1784,7 @@ virProcessGetStatInfo(unsigned long long *cpuTime,
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virStrToLong_ullp(proc_stat[VIR_PROCESS_STAT_STIME], NULL, 10, &systime) < 0 ||
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virStrToLong_l(proc_stat[VIR_PROCESS_STAT_RSS], NULL, 10, &rss) < 0 ||
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virStrToLong_i(proc_stat[VIR_PROCESS_STAT_PROCESSOR], NULL, 10, &cpu) < 0) {
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- virReportError(VIR_ERR_INTERNAL_ERROR,
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- _("cannot parse process status data for pid '%d/%d'"),
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- (int) pid, (int) tid);
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- return -1;
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+ VIR_WARN("cannot parse process status data");
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}
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/* We got jiffies
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@@ -1884,8 +1881,7 @@ virProcessGetStatInfo(unsigned long long *cpuTime G_GNUC_UNUSED,
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pid_t pid G_GNUC_UNUSED,
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pid_t tid G_GNUC_UNUSED)
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{
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- virReportSystemError(ENOSYS, "%s",
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- _("Process statistics data is not supported on this platform"));
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+ errno = ENOSYS;
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return -1;
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}
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--
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2.35.1
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