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From bab2adc524f6a9a10a89a1055d8a15ed85e1df5a Mon Sep 17 00:00:00 2001
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Message-Id: <bab2adc524f6a9a10a89a1055d8a15ed85e1df5a@dist-git>
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From: Peter Chubb <Peter.Chubb@data61.csiro.au>
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Date: Mon, 1 Jul 2019 17:08:07 +0200
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Subject: [PATCH] util: Fix virCgroupGetMemoryStat
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Commit 901d2b9c introduced virCgroupGetMemoryStat and replaced
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the LXC virLXCCgroupGetMemStat logic in commit e634c7cd0. However,
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in doing so the replacement wasn't exact as the LXC logic used
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getline() to process the cgroup controller data, while the new
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virCgroupGetMemoryStat used "memory.stat" manual buffer read/
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processing which neglected to forward through @line in order
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to read each line in the output.
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To fix that, we should be sure to carry forward the @line value
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for each line read updating it beyond that current @newLine value
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once we've calculated the values that we want.
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Signed-off-by: Peter Chubb <peter.chubb@data61.csiro.au>
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Reviewed-by: John Ferlan <jferlan@redhat.com>
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Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
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(cherry picked from commit b8176d6eaa943bc9825ecc99d86c0c301e688dd0)
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1689297
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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
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Message-Id: <e5fcbe6cbcfc0cc54ebbf01167080845f590268b.1561993100.git.phrdina@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/util/vircgroupv1.c | 7 ++++++-
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src/util/vircgroupv2.c | 7 ++++++-
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2 files changed, 12 insertions(+), 2 deletions(-)
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diff --git a/src/util/vircgroupv1.c b/src/util/vircgroupv1.c
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index 97d108d3ac..3147084f21 100644
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--- a/src/util/vircgroupv1.c
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+++ b/src/util/vircgroupv1.c
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@@ -1477,7 +1477,7 @@ virCgroupV1GetMemoryStat(virCgroupPtr group,
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line = stat;
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- while (line) {
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+ while (*line) {
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char *newLine = strchr(line, '\n');
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char *valueStr = strchr(line, ' ');
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unsigned long long value;
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@@ -1507,6 +1507,11 @@ virCgroupV1GetMemoryStat(virCgroupPtr group,
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inactiveFileVal = value >> 10;
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else if (STREQ(line, "unevictable"))
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unevictableVal = value >> 10;
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+
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+ if (newLine)
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+ line = newLine + 1;
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+ else
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+ break;
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}
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*cache = cacheVal;
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diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
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index d6362e2b05..bff2f78d7e 100644
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--- a/src/util/vircgroupv2.c
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+++ b/src/util/vircgroupv2.c
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@@ -1069,7 +1069,7 @@ virCgroupV2GetMemoryStat(virCgroupPtr group,
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line = stat;
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- while (line) {
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+ while (*line) {
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char *newLine = strchr(line, '\n');
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char *valueStr = strchr(line, ' ');
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unsigned long long value;
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@@ -1103,6 +1103,11 @@ virCgroupV2GetMemoryStat(virCgroupPtr group,
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inactiveFileVal = value >> 10;
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else if (STREQ(line, "unevictable"))
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unevictableVal = value >> 10;
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+
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+ if (newLine)
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+ line = newLine + 1;
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+ else
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+ break;
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}
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*cache = cacheVal;
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--
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2.22.0
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