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From abf2cfc52b828aa892b446385875381f735ff947 Mon Sep 17 00:00:00 2001
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Message-Id: <abf2cfc52b828aa892b446385875381f735ff947@dist-git>
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From: Pavel Hrdina <phrdina@redhat.com>
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Date: Mon, 1 Jul 2019 17:07:32 +0200
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Subject: [PATCH] vircgroup: introduce virCgroupV2GetBlkioIoServiced
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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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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
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(cherry picked from commit 709260add941a247b3829cf940624333cb445bb7)
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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: <f178386744bb4d74f41acecb82807d451c255fc9.1561993100.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/vircgroupv2.c | 65 ++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 65 insertions(+)
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diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
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index f7863a5690..000fd4c747 100644
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--- a/src/util/vircgroupv2.c
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+++ b/src/util/vircgroupv2.c
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@@ -567,6 +567,70 @@ virCgroupV2GetBlkioWeight(virCgroupPtr group,
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}
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+static int
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+virCgroupV2GetBlkioIoServiced(virCgroupPtr group,
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+ long long *bytes_read,
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+ long long *bytes_write,
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+ long long *requests_read,
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+ long long *requests_write)
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+{
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+ long long stats_val;
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+ VIR_AUTOFREE(char *) str1 = NULL;
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+ char *p1;
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+ size_t i;
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+
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+ const char *value_names[] = {
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+ "rbytes=",
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+ "wbytes=",
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+ "rios=",
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+ "wios=",
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+ };
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+ long long *value_ptrs[] = {
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+ bytes_read,
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+ bytes_write,
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+ requests_read,
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+ requests_write
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+ };
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+
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+ *bytes_read = 0;
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+ *bytes_write = 0;
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+ *requests_read = 0;
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+ *requests_write = 0;
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+
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+ if (virCgroupGetValueStr(group,
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+ VIR_CGROUP_CONTROLLER_BLKIO,
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+ "io.stat", &str1) < 0) {
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+ return -1;
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+ }
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+
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+ /* sum up all entries of the same kind, from all devices */
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+ for (i = 0; i < ARRAY_CARDINALITY(value_names); i++) {
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+ p1 = str1;
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+
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+ while ((p1 = strstr(p1, value_names[i]))) {
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+ p1 += strlen(value_names[i]);
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+ if (virStrToLong_ll(p1, &p1, 10, &stats_val) < 0) {
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+ virReportError(VIR_ERR_INTERNAL_ERROR,
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+ _("Cannot parse byte '%s' stat '%s'"),
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+ value_names[i], p1);
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+ return -1;
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+ }
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+
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+ if (stats_val < 0 ||
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+ (stats_val > 0 && *value_ptrs[i] > (LLONG_MAX - stats_val))) {
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+ virReportError(VIR_ERR_OVERFLOW,
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+ _("Sum of byte '%s' stat overflows"),
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+ value_names[i]);
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+ return -1;
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+ }
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+ *value_ptrs[i] += stats_val;
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+ }
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+ }
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+
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+ return 0;
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+}
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+
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+
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virCgroupBackend virCgroupV2Backend = {
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.type = VIR_CGROUP_BACKEND_TYPE_V2,
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@@ -591,6 +655,7 @@ virCgroupBackend virCgroupV2Backend = {
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.setBlkioWeight = virCgroupV2SetBlkioWeight,
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.getBlkioWeight = virCgroupV2GetBlkioWeight,
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+ .getBlkioIoServiced = virCgroupV2GetBlkioIoServiced,
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};
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--
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2.22.0
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