[RFC PATCH v3 1/6] qemu_monitor: Added QEMU's "request-ebpf" support.
Added code for monitor and monitor_json.
The "request-ebpf" return's eBPF binary object encoded in base64.
QEMU provides eBPF that can be loaded and passed to it from Libvirt.
QEMU requires exact eBPF program/maps, so it can be retrieved using QAPI.
To load eBPF program - administrative capabilities are required,
so Libvirt may load it and pass it to the QEMU instance.
For now, there is only "RSS"(Receive Side Scaling) for virtio-net eBPF program
and maps.
Signed-off-by: Andrew Melnychenko <andrew(a)daynix.com>
---
src/qemu/qemu_monitor.c | 13 +++++++++++++
src/qemu/qemu_monitor.h | 3 +++
src/qemu/qemu_monitor_json.c | 26 ++++++++++++++++++++++++++
src/qemu/qemu_monitor_json.h | 3 +++
4 files changed, 45 insertions(+)
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 34e2ccab97..1dc2fa3fac 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4511,3 +4511,16 @@ qemuMonitorDisplayReload(qemuMonitor *mon,
return qemuMonitorJSONDisplayReload(mon, type, tlsCerts);
}
+
+const char *
+qemuMonitorGetEbpf(qemuMonitor *mon, const char *ebpfName)
+{
+ QEMU_CHECK_MONITOR_NULL(mon);
+
+ if (ebpfName == NULL) {
+ virReportInvalidNonNullArg(ebpfName);
+ return NULL;
+ }
+
+ return qemuMonitorJSONGetEbpf(mon, ebpfName);
+}
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 6e81945201..fe8853a2c4 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -1586,3 +1586,6 @@ int
qemuMonitorDisplayReload(qemuMonitor *mon,
const char *type,
bool tlsCerts);
+
+const char *
+qemuMonitorGetEbpf(qemuMonitor *mon, const char *ebpfName);
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index eb84a3d938..585a645e66 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -8896,3 +8896,29 @@ int qemuMonitorJSONDisplayReload(qemuMonitor *mon,
return 0;
}
+
+const char *
+qemuMonitorJSONGetEbpf(qemuMonitor *mon, const char *ebpfName)
+{
+ g_autoptr(virJSONValue) cmd = NULL;
+ g_autoptr(virJSONValue) reply = NULL;
+ virJSONValue *ret = NULL;
+
+ if (!(cmd = qemuMonitorJSONMakeCommand("request-ebpf", "s:id",
ebpfName, NULL)))
+ return NULL;
+
+ if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+ return NULL;
+
+ if (qemuMonitorJSONCheckError(cmd, reply) < 0)
+ return NULL;
+
+ ret = virJSONValueObjectGet(reply, "return");
+ if (!ret) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("request-ebpf reply was missing 'return'
data"));
+ return NULL;
+ }
+
+ return g_strdup(virJSONValueObjectGetString(ret, "object"));
+}
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 9684660d86..4a6fc9324e 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -829,3 +829,6 @@ qemuMonitorJSONQueryStats(qemuMonitor *mon,
int qemuMonitorJSONDisplayReload(qemuMonitor *mon,
const char *type,
bool tlsCerts);
+
+const char *
+qemuMonitorJSONGetEbpf(qemuMonitor *mon, const char *ebpfName);
--
2.44.0