From 39b7d11c4b75b3213054f7730887acca90f62969 Mon Sep 17 00:00:00 2001 Message-Id: <39b7d11c4b75b3213054f7730887acca90f62969@dist-git> From: Pavel Hrdina Date: Mon, 1 Jul 2019 17:07:34 +0200 Subject: [PATCH] vircgroup: introduce virCgroupV2(Set|Get)BlkioDeviceWeight MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Pavel Hrdina (cherry picked from commit 568f746eafce1194dc10cc91a41c91bf08fadd53) Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1689297 Signed-off-by: Pavel Hrdina Message-Id: <5dd74b70bcec7b3cd7186b53e76857dcf1d21c6f.1561993100.git.phrdina@redhat.com> Reviewed-by: Ján Tomko --- 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