[RFC PATCH 3/4] qemu_interface: Added routine for loading the eBPF objects.
Also, added dependencies for libbpf with bpf option.
Signed-off-by: Andrew Melnychenko <andrew(a)daynix.com>
---
meson.build | 6 ++++++
meson_options.txt | 1 +
src/qemu/meson.build | 1 +
src/qemu/qemu_interface.c | 42 +++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_interface.h | 4 ++++
5 files changed, 54 insertions(+)
diff --git a/meson.build b/meson.build
index de23fbda1e..b68e916246 100644
--- a/meson.build
+++ b/meson.build
@@ -1381,6 +1381,11 @@ if yajl_dep.found()
conf.set('WITH_YAJL', 1)
endif
+bpf_version = '1.1.0'
+bpf_dep = dependency('libbpf', version: '>=' + bpf_version, required:
get_option('bpf'))
+if bpf_dep.found()
+ conf.set('WITH_BPF', 1)
+endif
# generic build dependencies checks
@@ -2269,6 +2274,7 @@ libs_summary = {
'udev': udev_dep.found(),
'xdr': xdr_dep.found(),
'yajl': yajl_dep.found(),
+ 'bpf': bpf_dep.found(),
}
summary(libs_summary, section: 'Libraries', bool_yn: true)
diff --git a/meson_options.txt b/meson_options.txt
index 7c428a9eb0..092b2efe06 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -44,6 +44,7 @@ option('udev', type: 'feature', value: 'auto',
description: 'udev support')
option('wireshark_dissector', type: 'feature', value: 'auto',
description: 'wireshark support')
option('wireshark_plugindir', type: 'string', value: '',
description: 'wireshark plugins directory for use when installing wireshark
plugin')
option('yajl', type: 'feature', value: 'auto', description:
'yajl support')
+option('bpf', type: 'feature', value: 'auto', description:
'qemu libbpf support')
# build driver options
diff --git a/src/qemu/meson.build b/src/qemu/meson.build
index 64c62e584f..afd9133ae0 100644
--- a/src/qemu/meson.build
+++ b/src/qemu/meson.build
@@ -105,6 +105,7 @@ if conf.has('WITH_QEMU')
selinux_dep,
src_dep,
xdr_dep,
+ bpf_dep,
],
include_directories: [
conf_inc_dir,
diff --git a/src/qemu/qemu_interface.c b/src/qemu/qemu_interface.c
index 8856bb95a8..a3a43a43c5 100644
--- a/src/qemu/qemu_interface.c
+++ b/src/qemu/qemu_interface.c
@@ -36,6 +36,7 @@
#include <sys/stat.h>
#include <fcntl.h>
+#include <bpf/libbpf.h>
#define VIR_FROM_THIS VIR_FROM_QEMU
@@ -763,3 +764,44 @@ qemuInterfaceOpenVhostNet(virDomainObj *vm,
virDomainAuditNetDevice(vm->def, net, vhostnet_path, vhostfdSize);
return 0;
}
+
+
+int qemuInterfaceLoadEbpf(const void *ebpfObject, size_t ebpfSize, void **retLibbpfObj,
int *fds, int nfds) {
+ int err = 0;
+ int i = 0;
+
+ struct bpf_object *obj = bpf_object__open_mem(ebpfObject, ebpfSize, NULL);
+ err = libbpf_get_error(obj);
+ if(err) {
+ return -1;
+ }
+
+ struct bpf_program *prog;
+ struct bpf_map *map;
+
+ err = bpf_object__load(obj);
+ if (err) {
+ return -1;
+ }
+
+ bpf_object__for_each_program(prog, obj) {
+ fds[i] = bpf_program__fd(prog);
+ ++i;
+ }
+
+ bpf_object__for_each_map(map, obj) {
+ fds[i] = bpf_map__fd(map);
+ ++i;
+ }
+
+ *retLibbpfObj = obj;
+
+ return i;
+}
+
+
+void qemuInterfaceCloseEbpf(void *libbpfObj)
+{
+ if(libbpfObj)
+ bpf_object__close(libbpfObj);
+}
diff --git a/src/qemu/qemu_interface.h b/src/qemu/qemu_interface.h
index 6eed3e6bd7..dbc1fd625c 100644
--- a/src/qemu/qemu_interface.h
+++ b/src/qemu/qemu_interface.h
@@ -55,3 +55,7 @@ int qemuInterfaceOpenVhostNet(virDomainObj *def,
int qemuInterfacePrepareSlirp(virQEMUDriver *driver,
virDomainNetDef *net);
+
+int qemuInterfaceLoadEbpf(const void *ebpfObject, size_t ebpfSize, void **retLibbpfObj,
int *fds, int nfds);
+
+void qemuInterfaceCloseEbpf(void *libbpfObj);
--
2.42.0