virHostCPUGetStatsLinux walks through every cpu in /proc/stat until it
finds cpu%cpuNum that matches with the requested cpu.
If none is found it logs the error but it should return -1, instead of 0.
Otherwise virsh nodecpustats --cpu <invalid cpu number> and API bindings
don't fail properly, printing a blank line instead of an error message.
This patch also includes an additional test for virhostcputest to avoid
this regression to happen again in the future.
Reported-by: Satheesh Rajendran <satheera@in.ibm.com>
Signed-off-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com>
---
src/util/virhostcpu.c | 2 +-
tests/virhostcputest.c | 9 ++++++---
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/src/util/virhostcpu.c b/src/util/virhostcpu.c
index 81293eea8c..20c8d0ce6c 100644
--- a/src/util/virhostcpu.c
+++ b/src/util/virhostcpu.c
@@ -847,7 +847,7 @@ virHostCPUGetStatsLinux(FILE *procstat,
_("Invalid cpuNum in %s"),
__FUNCTION__);
- return 0;
+ return -1;
}
diff --git a/tests/virhostcputest.c b/tests/virhostcputest.c
index 7865b61578..2f569d8bd4 100644
--- a/tests/virhostcputest.c
+++ b/tests/virhostcputest.c
@@ -258,14 +258,17 @@ mymain(void)
if (virTestRun(nodeData[i].testName, linuxTestHostCPU, &nodeData[i]) != 0)
ret = -1;
-# define DO_TEST_CPU_STATS(name, ncpus) \
+# define DO_TEST_CPU_STATS(name, ncpus, shouldFail) \
do { \
static struct nodeCPUStatsData data = { name, ncpus }; \
- if (virTestRun("CPU stats " name, linuxTestNodeCPUStats, &data) < 0) \
+ if ((virTestRun("CPU stats " name, \
+ linuxTestNodeCPUStats, \
+ &data) < 0) != shouldFail) \
ret = -1; \
} while (0)
- DO_TEST_CPU_STATS("24cpu", 24);
+ DO_TEST_CPU_STATS("24cpu", 24, false);
+ DO_TEST_CPU_STATS("24cpu", 25, true);
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
--
2.24.1
On Fri, Feb 21, 2020 at 7:11 PM Mauro S. M. Rodrigues < maurosr@linux.vnet.ibm.com> wrote: > virHostCPUGetStatsLinux walks through every cpu in /proc/stat until it > finds cpu%cpuNum that matches with the requested cpu. > If none is found it logs the error but it should return -1, instead of 0. > Otherwise virsh nodecpustats --cpu <invalid cpu number> and API bindings > don't fail properly, printing a blank line instead of an error message. > > This patch also includes an additional test for virhostcputest to avoid > this regression to happen again in the future. > I reviewed and tested this in the scope of [1] Before: root@f:~# virsh nodecpustats --cpu 47 root@f:~# echo $? 0 After root@f:~# virsh nodecpustats --cpu 47 error: Unable to get node cpu stats error: Invalid cpuNum in virHostCPUGetStatsLinux root@f-dcap-after-cap:~# echo $? 1 You also see the added test passing PASS: virhostcputest in the build log at [2] Thanks Mauro, feel free to add my review and test tags: Reviewed-by: Christian Ehrhardt <christian.ehrhardt@canonical.com> Tested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com> [1]: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1868528 [2]: https://launchpadlibrarian.net/470309458/buildlog_ubuntu-focal-amd64.libvirt_6.0.0-0ubuntu6~ppa2_BUILDING.txt.gz > Reported-by: Satheesh Rajendran <satheera@in.ibm.com> > Signed-off-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com> > --- > src/util/virhostcpu.c | 2 +- > tests/virhostcputest.c | 9 ++++++--- > 2 files changed, 7 insertions(+), 4 deletions(-) > > diff --git a/src/util/virhostcpu.c b/src/util/virhostcpu.c > index 81293eea8c..20c8d0ce6c 100644 > --- a/src/util/virhostcpu.c > +++ b/src/util/virhostcpu.c > @@ -847,7 +847,7 @@ virHostCPUGetStatsLinux(FILE *procstat, > _("Invalid cpuNum in %s"), > __FUNCTION__); > > - return 0; > + return -1; > } > > > diff --git a/tests/virhostcputest.c b/tests/virhostcputest.c > index 7865b61578..2f569d8bd4 100644 > --- a/tests/virhostcputest.c > +++ b/tests/virhostcputest.c > @@ -258,14 +258,17 @@ mymain(void) > if (virTestRun(nodeData[i].testName, linuxTestHostCPU, > &nodeData[i]) != 0) > ret = -1; > > -# define DO_TEST_CPU_STATS(name, ncpus) \ > +# define DO_TEST_CPU_STATS(name, ncpus, shouldFail) \ > do { \ > static struct nodeCPUStatsData data = { name, ncpus }; \ > - if (virTestRun("CPU stats " name, linuxTestNodeCPUStats, &data) < > 0) \ > + if ((virTestRun("CPU stats " name, \ > + linuxTestNodeCPUStats, \ > + &data) < 0) != shouldFail) \ > ret = -1; \ > } while (0) > > - DO_TEST_CPU_STATS("24cpu", 24); > + DO_TEST_CPU_STATS("24cpu", 24, false); > + DO_TEST_CPU_STATS("24cpu", 25, true); > > return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE; > } > -- > 2.24.1 > > > -- Christian Ehrhardt Staff Engineer, Ubuntu Server Canonical Ltd
On 21. 2. 2020 19:10, Mauro S. M. Rodrigues wrote: > virHostCPUGetStatsLinux walks through every cpu in /proc/stat until it > finds cpu%cpuNum that matches with the requested cpu. > If none is found it logs the error but it should return -1, instead of 0. > Otherwise virsh nodecpustats --cpu <invalid cpu number> and API bindings > don't fail properly, printing a blank line instead of an error message. > > This patch also includes an additional test for virhostcputest to avoid > this regression to happen again in the future. > > Reported-by: Satheesh Rajendran <satheera@in.ibm.com> > Signed-off-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com> > --- > src/util/virhostcpu.c | 2 +- > tests/virhostcputest.c | 9 ++++++--- > 2 files changed, 7 insertions(+), 4 deletions(-) > > diff --git a/src/util/virhostcpu.c b/src/util/virhostcpu.c > index 81293eea8c..20c8d0ce6c 100644 > --- a/src/util/virhostcpu.c > +++ b/src/util/virhostcpu.c > @@ -847,7 +847,7 @@ virHostCPUGetStatsLinux(FILE *procstat, > _("Invalid cpuNum in %s"), > __FUNCTION__); > > - return 0; > + return -1; > } Oops, yes. This was introduced by 93af79fba3fd75a8df6b7ca608719dd97f9511a0. > > > diff --git a/tests/virhostcputest.c b/tests/virhostcputest.c > index 7865b61578..2f569d8bd4 100644 > --- a/tests/virhostcputest.c > +++ b/tests/virhostcputest.c > @@ -258,14 +258,17 @@ mymain(void) > if (virTestRun(nodeData[i].testName, linuxTestHostCPU, &nodeData[i]) != 0) > ret = -1; > > -# define DO_TEST_CPU_STATS(name, ncpus) \ > +# define DO_TEST_CPU_STATS(name, ncpus, shouldFail) \ > do { \ > static struct nodeCPUStatsData data = { name, ncpus }; \ > - if (virTestRun("CPU stats " name, linuxTestNodeCPUStats, &data) < 0) \ > + if ((virTestRun("CPU stats " name, \ > + linuxTestNodeCPUStats, \ > + &data) < 0) != shouldFail) \ We do it slightly differently. We pass shouldFail to the callback and let it fix its retval so that virTestRun() interprets it properly. > ret = -1; \ > } while (0) > > - DO_TEST_CPU_STATS("24cpu", 24); > + DO_TEST_CPU_STATS("24cpu", 24, false); > + DO_TEST_CPU_STATS("24cpu", 25, true); > > return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE; > } > I'm fixing the test, adding the referenced commit into the commit message and pushing. Reviewed-by: Michal Privoznik <mprivozn@redhat.com> Congratulations on your first libvirt contribution! Michal
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