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From af9bf10ff9d8a6f0ae9b6d898138144bf7dcd161 Mon Sep 17 00:00:00 2001
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Message-Id: <af9bf10ff9d8a6f0ae9b6d898138144bf7dcd161@dist-git>
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From: Pavel Hrdina <phrdina@redhat.com>
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Date: Mon, 1 Jul 2019 17:07:18 +0200
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Subject: [PATCH] vircgroup: introduce virCgroupV2DetectPlacement
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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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If the placement was copied from parent or set to absolute path
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there is nothing to do, otherwise set the placement based on
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process placement from /proc/self/cgroup or /proc/{pid}/cgroup.
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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
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(cherry picked from commit 1efcf202e777d32600e90f3176e0357053341533)
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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: <7fcc9d25385c40df5531e5b7171338a624d0c4fb.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 | 26 ++++++++++++++++++++++++++
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1 file changed, 26 insertions(+)
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diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
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index 19a9ba38f8..fb1aa2de0a 100644
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--- a/src/util/vircgroupv2.c
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+++ b/src/util/vircgroupv2.c
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@@ -181,6 +181,31 @@ virCgroupV2DetectMounts(virCgroupPtr group,
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}
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+static int
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+virCgroupV2DetectPlacement(virCgroupPtr group,
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+ const char *path,
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+ const char *controllers ATTRIBUTE_UNUSED,
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+ const char *selfpath)
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+{
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+ if (group->unified.placement)
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+ return 0;
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+
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+ /*
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+ * selfpath == "/" + path="" -> "/"
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+ * selfpath == "/libvirt.service" + path == "" -> "/libvirt.service"
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+ * selfpath == "/libvirt.service" + path == "foo" -> "/libvirt.service/foo"
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+ */
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+ if (virAsprintf(&group->unified.placement,
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+ "%s%s%s", selfpath,
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+ (STREQ(selfpath, "/") ||
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+ STREQ(path, "") ? "" : "/"),
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+ path) < 0)
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+ return -1;
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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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@@ -189,6 +214,7 @@ virCgroupBackend virCgroupV2Backend = {
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.copyMounts = virCgroupV2CopyMounts,
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.copyPlacement = virCgroupV2CopyPlacement,
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.detectMounts = virCgroupV2DetectMounts,
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+ .detectPlacement = virCgroupV2DetectPlacement,
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};
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--
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2.22.0
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