From 39b7d11c4b75b3213054f7730887acca90f62969 Mon Sep 17 00:00:00 2001

Message-Id: <39b7d11c4b75b3213054f7730887acca90f62969@dist-git>

From: Pavel Hrdina <phrdina@redhat.com>

Date: Mon, 1 Jul 2019 17:07:34 +0200

Subject: [PATCH] vircgroup: introduce virCgroupV2(Set|Get)BlkioDeviceWeight

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>

(cherry picked from commit 568f746eafce1194dc10cc91a41c91bf08fadd53)

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1689297

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>

Message-Id: <5dd74b70bcec7b3cd7186b53e76857dcf1d21c6f.1561993100.git.phrdina@redhat.com>

Reviewed-by: Ján Tomko <jtomko@redhat.com>

---

 src/util/vircgroupv2.c | 51 ++++++++++++++++++++++++++++++++++++++++++

 1 file changed, 51 insertions(+)

diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c

index fcf39406e1..86b3fc127a 100644

--- a/src/util/vircgroupv2.c

+++ b/src/util/vircgroupv2.c

@@ -694,6 +694,55 @@ virCgroupV2GetBlkioIoDeviceServiced(virCgroupPtr group,

 }

+static int

+virCgroupV2SetBlkioDeviceWeight(virCgroupPtr group,

+                                const char *path,

+                                unsigned int weight)

+{

+    VIR_AUTOFREE(char *) str = NULL;

+    VIR_AUTOFREE(char *) blkstr = NULL;

+

+    if (!(blkstr = virCgroupGetBlockDevString(path)))

+        return -1;

+

+    if (virAsprintf(&str, "%s%d", blkstr, weight) < 0)

+        return -1;

+

+    return virCgroupSetValueStr(group,

+                                VIR_CGROUP_CONTROLLER_BLKIO,

+                                "io.weight",

+                                str);

+}

+

+

+static int

+virCgroupV2GetBlkioDeviceWeight(virCgroupPtr group,

+                                const char *path,

+                                unsigned int *weight)

+{

+    VIR_AUTOFREE(char *) str = NULL;

+

+    if (virCgroupGetValueForBlkDev(group,

+                                   VIR_CGROUP_CONTROLLER_BLKIO,

+                                   "io.weight",

+                                   path,

+                                   &str) < 0) {

+        return -1;

+    }

+

+    if (!str) {

+        *weight = 0;

+    } else if (virStrToLong_ui(str, NULL, 10, weight) < 0) {

+        virReportError(VIR_ERR_INTERNAL_ERROR,

+                       _("Unable to parse '%s' as an integer"),

+                       str);

+        return -1;

+    }

+

+    return 0;

+}

+

+

 virCgroupBackend virCgroupV2Backend = {

     .type = VIR_CGROUP_BACKEND_TYPE_V2,

@@ -720,6 +769,8 @@ virCgroupBackend virCgroupV2Backend = {

     .getBlkioWeight = virCgroupV2GetBlkioWeight,

     .getBlkioIoServiced = virCgroupV2GetBlkioIoServiced,

     .getBlkioIoDeviceServiced = virCgroupV2GetBlkioIoDeviceServiced,

+    .setBlkioDeviceWeight = virCgroupV2SetBlkioDeviceWeight,

+    .getBlkioDeviceWeight = virCgroupV2GetBlkioDeviceWeight,

 };

-- 

2.22.0