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