libvirt/SOURCES/libvirt-qemu-put-virtiofsd-in-the-emulator-cgroup.patch

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From 6c6f1a32c07941d6fe6208e1ad12dc137dbe7c41 Mon Sep 17 00:00:00 2001
Message-Id: <6c6f1a32c07941d6fe6208e1ad12dc137dbe7c41@dist-git>
From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
Date: Wed, 4 Mar 2020 12:42:47 +0100
Subject: [PATCH] qemu: put virtiofsd in the emulator cgroup
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Wire up the code to put virtiofsd in the emulator cgroup on domain
startup.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Tested-by: Andrea Bolognani <abologna@redhat.com>
(cherry picked from commit 9de5d69c218faa0e25c5d6a56ab5f6bacbd1a132)
Signed-off-by: Ján Tomko <jtomko@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1694166
Message-Id: <7653ce933656c9a13c9afa2a019ef11fb192bdc4.1583322091.git.jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
---
src/qemu/qemu_extdevice.c | 15 +++++++++++++++
src/qemu/qemu_virtiofs.c | 26 ++++++++++++++++++++++++++
src/qemu/qemu_virtiofs.h | 5 +++++
3 files changed, 46 insertions(+)
diff --git a/src/qemu/qemu_extdevice.c b/src/qemu/qemu_extdevice.c
index bfa770f45a..f66bafb62f 100644
--- a/src/qemu/qemu_extdevice.c
+++ b/src/qemu/qemu_extdevice.c
@@ -248,6 +248,13 @@ qemuExtDevicesHasDevice(virDomainDefPtr def)
if (def->tpm && def->tpm->type == VIR_DOMAIN_TPM_TYPE_EMULATOR)
return true;
+ for (i = 0; i < def->nfss; i++) {
+ virDomainFSDefPtr fs = def->fss[i];
+
+ if (fs->fsdriver == VIR_DOMAIN_FS_DRIVER_TYPE_VIRTIOFS)
+ return true;
+ }
+
return false;
}
@@ -272,5 +279,13 @@ qemuExtDevicesSetupCgroup(virQEMUDriverPtr driver,
qemuExtTPMSetupCgroup(driver, def, cgroup) < 0)
return -1;
+ for (i = 0; i < def->nfss; i++) {
+ virDomainFSDefPtr fs = def->fss[i];
+
+ if (fs->fsdriver == VIR_DOMAIN_FS_DRIVER_TYPE_VIRTIOFS &&
+ qemuVirtioFSSetupCgroup(vm, fs, cgroup) < 0)
+ return -1;
+ }
+
return 0;
}
diff --git a/src/qemu/qemu_virtiofs.c b/src/qemu/qemu_virtiofs.c
index 09ab2cef27..194855ece8 100644
--- a/src/qemu/qemu_virtiofs.c
+++ b/src/qemu/qemu_virtiofs.c
@@ -299,3 +299,29 @@ qemuVirtioFSStop(virQEMUDriverPtr driver G_GNUC_UNUSED,
cleanup:
virErrorRestore(&orig_err);
}
+
+
+int
+qemuVirtioFSSetupCgroup(virDomainObjPtr vm,
+ virDomainFSDefPtr fs,
+ virCgroupPtr cgroup)
+{
+ g_autofree char *pidfile = NULL;
+ pid_t pid = -1;
+ int rc;
+
+ if (!(pidfile = qemuVirtioFSCreatePidFilename(vm, fs->info.alias)))
+ return -1;
+
+ rc = virPidFileReadPathIfAlive(pidfile, &pid, NULL);
+ if (rc < 0 || pid == (pid_t) -1) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("virtiofsd died unexpectedly"));
+ return -1;
+ }
+
+ if (virCgroupAddProcess(cgroup, pid) < 0)
+ return -1;
+
+ return 0;
+}
diff --git a/src/qemu/qemu_virtiofs.h b/src/qemu/qemu_virtiofs.h
index b2f0c57d0c..1db59917c6 100644
--- a/src/qemu/qemu_virtiofs.h
+++ b/src/qemu/qemu_virtiofs.h
@@ -35,3 +35,8 @@ void
qemuVirtioFSStop(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainFSDefPtr fs);
+
+int
+qemuVirtioFSSetupCgroup(virDomainObjPtr vm,
+ virDomainFSDefPtr fs,
+ virCgroupPtr cgroup);
--
2.25.1