9:45 p.m.
Also, added dependencies for libbpf with bpf option.
Signed-off-by: Andrew Melnychenko <andrew(a)daynix.com>
---
meson.build | 7 ++++
meson_options.txt | 1 +
src/qemu/meson.build | 1 +
src/qemu/qemu_interface.c | 83 +++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_interface.h | 4 ++
5 files changed, 96 insertions(+)
diff --git a/meson.build b/meson.build
index e8b0094b91..e12a703a4d 100644
--- a/meson.build
+++ b/meson.build
@@ -998,6 +998,12 @@ else
libkvm_dep = dependency('', required: false)
endif
+libbpf_version = '1.1.0'
+libbpf_dep = dependency('libbpf', version: '>=' + libbpf_version,
required: get_option('libbpf'))
+if libbpf_dep.found()
+ conf.set('WITH_BPF', 1)
+endif
+
libiscsi_version = '1.18.0'
libiscsi_dep = dependency('libiscsi', version: '>=' +
libiscsi_version, required: get_option('libiscsi'))
@@ -2283,6 +2289,7 @@ libs_summary = {
'dlopen': dlopen_dep.found(),
'fuse': fuse_dep.found(),
'glusterfs': glusterfs_dep.found(),
+ 'libbpf': libbpf_dep.found(),
'libiscsi': libiscsi_dep.found(),
'libkvm': libkvm_dep.found(),
'libnbd': libnbd_dep.found(),
diff --git a/meson_options.txt b/meson_options.txt
index 9d729b3e1f..9b7bd9d1f8 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -48,6 +48,7 @@ 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('libbpf', type: 'feature', value: 'auto', description:
'qemu libbpf support')
# build driver options
diff --git a/src/qemu/meson.build b/src/qemu/meson.build
index 907893d431..de7ae87d5b 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,
+ libbpf_dep,
],
include_directories: [
conf_inc_dir,
diff --git a/src/qemu/qemu_interface.c b/src/qemu/qemu_interface.c
index c2007c7043..ec8cf18d86 100644
--- a/src/qemu/qemu_interface.c
+++ b/src/qemu/qemu_interface.c
@@ -38,6 +38,10 @@
#include <sys/stat.h>
#include <fcntl.h>
+#ifdef WITH_BPF
+#include <bpf/libbpf.h>
+#endif
+
#define VIR_FROM_THIS VIR_FROM_QEMU
VIR_LOG_INIT("qemu.qemu_interface");
@@ -432,3 +436,82 @@ qemuInterfaceOpenVhostNet(virDomainObj *vm,
virDomainAuditNetDevice(vm->def, net, vhostnet_path, vhostfdSize);
return 0;
}
+
+#ifdef WITH_BPF
+
+int
+qemuInterfaceLoadEbpf(const char *ebpfObject, void **retLibbpfObj, int *fds, size_t
nfds)
+{
+ int err = 0;
+ size_t i = 0;
+ struct bpf_program *prog;
+ struct bpf_map *map;
+ struct bpf_object *obj;
+ size_t ebpfSize = 0;
+ g_autofree void *ebpfRawData = NULL;
+
+ ebpfRawData = g_base64_decode(ebpfObject, &ebpfSize);
+ if (ebpfRawData == NULL) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("can't decode
the eBPF from base64"));
+ return -1;
+ }
+
+ obj = bpf_object__open_mem(ebpfRawData, ebpfSize, NULL);
+ err = libbpf_get_error(obj);
+ if (err) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("can't open
eBPF object"));
+ return -1;
+ }
+
+
+ err = bpf_object__load(obj);
+ if (err) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("can't load
eBPF object"));
+ return -1;
+ }
+
+ bpf_object__for_each_program(prog, obj) {
+ fds[i] = bpf_program__fd(prog);
+ ++i;
+ if (i > nfds) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("to much file
descriptors in eBPF"));
+ return -1;
+ }
+ }
+
+ bpf_object__for_each_map(map, obj) {
+ fds[i] = bpf_map__fd(map);
+ ++i;
+ if (i > nfds) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("to much file
descriptors in eBPF"));
+ return -1;
+ }
+ }
+
+ *retLibbpfObj = obj;
+
+ return i - 1;
+}
+
+
+void
+qemuInterfaceCloseEbpf(void *libbpfObj)
+{
+ if (libbpfObj)
+ bpf_object__close(libbpfObj);
+}
+#else
+
+int
+qemuInterfaceLoadEbpf(const char *ebpfObject G_GNUC_UNUSED, void **retLibbpfObj
G_GNUC_UNUSED,
+ int *fds G_GNUC_UNUSED, size_t nfds G_GNUC_UNUSED)
+{
+ return -1;
+}
+
+void
+qemuInterfaceCloseEbpf(void *libbpfObj G_GNUC_UNUSED)
+{
+}
+
+#endif
diff --git a/src/qemu/qemu_interface.h b/src/qemu/qemu_interface.h
index aee5f9efb0..b6f39550cd 100644
--- a/src/qemu/qemu_interface.h
+++ b/src/qemu/qemu_interface.h
@@ -44,3 +44,7 @@ int qemuInterfaceOpenVhostNet(virDomainObj *def,
int qemuInterfacePrepareSlirp(virQEMUDriver *driver,
virDomainNetDef *net);
+
+int qemuInterfaceLoadEbpf(const char *ebpfObject, void **retLibbpfObj, int *fds, size_t
nfds);
+
+void qemuInterfaceCloseEbpf(void *libbpfObj);
--
2.44.0