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From ff54ea3d2a61a25079339d38caa6c509cf697ce3 Mon Sep 17 00:00:00 2001
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Message-Id: <ff54ea3d2a61a25079339d38caa6c509cf697ce3@dist-git>
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From: "Mauro S. M. Rodrigues" <maurosr@linux.vnet.ibm.com>
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Date: Tue, 19 Jan 2021 21:04:08 -0300
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Subject: [PATCH] util: virhostcpu: Fail when fetching CPU Stats for invalid
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cpu
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virHostCPUGetStatsLinux walks through every cpu in /proc/stat until it
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finds cpu%cpuNum that matches with the requested cpu.
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If none is found it logs the error but it should return -1, instead of 0.
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Otherwise virsh nodecpustats --cpu <invalid cpu number> and API bindings
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don't fail properly, printing a blank line instead of an error message.
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This patch also includes an additional test for virhostcputest to avoid
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this regression to happen again in the future.
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Fixes: 93af79fba3fd75a8df6b7ca608719dd97f9511a0
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Reported-by: Satheesh Rajendran <satheera@in.ibm.com>
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Signed-off-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com>
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
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Tested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
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(cherry picked from commit 75a4ec42f70b5324f95d7ffbbfbf7457620735e4)
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https://bugzilla.redhat.com/1915183
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Signed-off-by: Daniel Henrique Barboza <dbarboza@redhat.com>
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Message-Id: <20210120000408.106596-1-dbarboza@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/util/virhostcpu.c | 2 +-
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tests/virhostcputest.c | 21 ++++++++++++++++++---
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2 files changed, 19 insertions(+), 4 deletions(-)
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diff --git a/src/util/virhostcpu.c b/src/util/virhostcpu.c
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index 218272d7ec..37cc45e3a6 100644
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--- a/src/util/virhostcpu.c
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+++ b/src/util/virhostcpu.c
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@@ -855,7 +855,7 @@ virHostCPUGetStatsLinux(FILE *procstat,
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_("Invalid cpuNum in %s"),
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__FUNCTION__);
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- return 0;
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+ return -1;
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}
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diff --git a/tests/virhostcputest.c b/tests/virhostcputest.c
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index 7865b61578..70a723098b 100644
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--- a/tests/virhostcputest.c
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+++ b/tests/virhostcputest.c
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@@ -196,6 +196,7 @@ linuxTestHostCPU(const void *opaque)
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struct nodeCPUStatsData {
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const char *name;
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int ncpus;
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+ bool shouldFail;
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};
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static int
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@@ -214,6 +215,19 @@ linuxTestNodeCPUStats(const void *data)
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result = linuxCPUStatsCompareFiles(cpustatfile,
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testData->ncpus,
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outfile);
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+ if (result < 0) {
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+ if (testData->shouldFail) {
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+ /* Expected error */
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+ result = 0;
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+ }
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+ } else {
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+ if (testData->shouldFail) {
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+ fprintf(stderr, "Expected a failure, got success");
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+ result = -1;
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+ }
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+ }
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+
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+
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VIR_FREE(cpustatfile);
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VIR_FREE(outfile);
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return result;
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@@ -258,14 +272,15 @@ mymain(void)
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if (virTestRun(nodeData[i].testName, linuxTestHostCPU, &nodeData[i]) != 0)
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ret = -1;
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-# define DO_TEST_CPU_STATS(name, ncpus) \
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+# define DO_TEST_CPU_STATS(name, ncpus, shouldFail) \
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do { \
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- static struct nodeCPUStatsData data = { name, ncpus }; \
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+ static struct nodeCPUStatsData data = { name, ncpus, shouldFail}; \
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if (virTestRun("CPU stats " name, linuxTestNodeCPUStats, &data) < 0) \
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ret = -1; \
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} while (0)
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- DO_TEST_CPU_STATS("24cpu", 24);
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+ DO_TEST_CPU_STATS("24cpu", 24, false);
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+ DO_TEST_CPU_STATS("24cpu", 25, true);
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return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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--
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2.30.0
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