[libvirt PATCH 8/9] qemu: hook up passt config to qemu domains
Ján Tomko
jtomko at redhat.com
Mon Jan 9 07:32:09 UTC 2023
On a Sunday in 2023, Laine Stump wrote:
>This consists of (1) adding the necessary args to the qemu commandline
>netdev option, and (2) starting a passt process prior to starting
>qemu, and making sure that it is terminated when it's no longer
>needed. Under normal circumstances, passt will terminate itself as
>soon as qemu closes its socket, but in case of some error where qemu
>is never started, or fails to startup completely, we need to terminate
>passt manually.
>
>Signed-off-by: Laine Stump <laine at redhat.com>
>---
> meson.build | 1 +
> po/POTFILES | 1 +
> src/qemu/meson.build | 2 +
> src/qemu/qemu_command.c | 11 +-
> src/qemu/qemu_command.h | 3 +-
> src/qemu/qemu_domain.c | 5 +-
> src/qemu/qemu_domain.h | 3 +-
> src/qemu/qemu_extdevice.c | 25 +-
> src/qemu/qemu_hotplug.c | 26 +-
> src/qemu/qemu_passt.c | 284 ++++++++++++++++++
> src/qemu/qemu_passt.h | 38 +++
> src/qemu/qemu_process.c | 1 +
> src/qemu/qemu_validate.c | 9 +-
> tests/qemuxml2argvdata/net-user-passt.args | 34 +++
> .../net-user-passt.x86_64-latest.args | 37 +++
> tests/qemuxml2argvtest.c | 2 +
> 16 files changed, 470 insertions(+), 12 deletions(-)
> create mode 100644 src/qemu/qemu_passt.c
> create mode 100644 src/qemu/qemu_passt.h
> create mode 100644 tests/qemuxml2argvdata/net-user-passt.args
> create mode 100644 tests/qemuxml2argvdata/net-user-passt.x86_64-latest.args
>
>diff --git a/src/qemu/qemu_passt.c b/src/qemu/qemu_passt.c
>new file mode 100644
>index 0000000000..5941594811
>--- /dev/null
>+++ b/src/qemu/qemu_passt.c
>@@ -0,0 +1,284 @@
>+/*
>+ * qemu_passt.c: QEMU passt support
>+ *
>+ * Copyright (C) 2022 Red Hat, Inc.
>+ *
>+ * This library is free software; you can redistribute it and/or
>+ * modify it under the terms of the GNU Lesser General Public
>+ * License as published by the Free Software Foundation; either
>+ * version 2.1 of the License, or (at your option) any later version.
>+ *
>+ * This library is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>+ * Lesser General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU Lesser General Public
>+ * License along with this library. If not, see
>+ * <http://www.gnu.org/licenses/>.
>+ */
>+
>+#include <config.h>
>+
>+#include "qemu_dbus.h"
>+#include "qemu_extdevice.h"
>+#include "qemu_security.h"
>+#include "qemu_passt.h"
>+#include "virenum.h"
>+#include "virerror.h"
>+#include "virjson.h"
>+#include "virlog.h"
>+#include "virpidfile.h"
>+
>+#define VIR_FROM_THIS VIR_FROM_NONE
>+
>+VIR_LOG_INIT("qemu.passt");
>+
>+
>+static char *
>+qemuPasstCreatePidFilename(virDomainObj *vm,
>+ virDomainNetDef *net)
>+{
>+ qemuDomainObjPrivate *priv = vm->privateData;
>+ virQEMUDriver *driver = priv->driver;
>+ g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
>+ g_autofree char *name = NULL;
>+
>+ name = g_strdup_printf("%s-%s-passt", vm->def->name, net->info.alias);
Please use virDomainDefGetShortName for filename purposes.
>+
>+ return virPidFileBuildPath(cfg->passtStateDir, name);
>+}
>+
>+
[...]
>+int
>+qemuPasstAddNetProps(virDomainObj *vm,
>+ virDomainNetDef *net,
>+ virJSONValue **netprops)
>+{
>+ g_autofree char *passtSocketName = qemuPasstCreateSocketPath(vm, net);
>+ g_autoptr(virJSONValue) addrprops = NULL;
>+
>+ if (virJSONValueObjectAdd(&addrprops,
>+ "s:type", "unix",
>+ "s:path", passtSocketName,
>+ NULL) < 0) {
>+ return -1;
>+ }
>+
>+ if (virJSONValueObjectAdd(netprops,
>+ "s:type", "stream",
>+ "a:addr", &addrprops,
>+ "b:server", false,
>+ /* "u:reconnect", 5, */
Debugging leftover?
>+ NULL) < 0) {
>+ return -1;
>+ }
>+ return 0;
>+}
>+
>+
>+void
>+qemuPasstStop(virDomainObj *vm,
>+ virDomainNetDef *net)
>+{
>+ g_autofree char *pidfile = qemuPasstCreatePidFilename(vm, net);
>+ virErrorPtr orig_err;
>+
>+ virErrorPreserveLast(&orig_err);
>+
>+
Extra whitespace
>+ if (virPidFileForceCleanupPath(pidfile) < 0)
>+ VIR_WARN("Unable to kill passt process");
>+
>+ virErrorRestore(&orig_err);
>+}
>+
>+
Reviewed-by: Ján Tomko <jtomko at redhat.com>
Jano
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 228 bytes
Desc: not available
URL: <http://listman.redhat.com/archives/libvir-list/attachments/20230109/48a174c3/attachment-0001.sig>
More information about the libvir-list
mailing list