[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v3 4/6] ebpf: Added declaration/initialization routines.
From: |
Andrew Melnychenko |
Subject: |
[PATCH v3 4/6] ebpf: Added declaration/initialization routines. |
Date: |
Thu, 15 Jun 2023 01:10:24 +0300 |
Now, the binary objects may be retrieved by id.
It would require for future qmp commands that may require specific
eBPF blob.
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
---
ebpf/ebpf.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++
ebpf/ebpf.h | 31 +++++++++++++++++++++
ebpf/ebpf_rss.c | 6 +++++
ebpf/meson.build | 2 +-
4 files changed, 108 insertions(+), 1 deletion(-)
create mode 100644 ebpf/ebpf.c
create mode 100644 ebpf/ebpf.h
diff --git a/ebpf/ebpf.c b/ebpf/ebpf.c
new file mode 100644
index 00000000000..ea97c0403ee
--- /dev/null
+++ b/ebpf/ebpf.c
@@ -0,0 +1,70 @@
+/*
+ * QEMU eBPF binary declaration routine.
+ *
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
+ *
+ * Authors:
+ * Andrew Melnychenko <andrew@daynix.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/queue.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-ebpf.h"
+#include "ebpf/ebpf.h"
+
+struct ElfBinaryDataEntry {
+ int id;
+ const void *data;
+ size_t datalen;
+
+ QSLIST_ENTRY(ElfBinaryDataEntry) node;
+};
+
+static QSLIST_HEAD(, ElfBinaryDataEntry) ebpf_elf_obj_list =
+ QSLIST_HEAD_INITIALIZER();
+
+void ebpf_register_binary_data(int id, const void *data, size_t datalen)
+{
+ struct ElfBinaryDataEntry *dataentry = NULL;
+
+ dataentry = g_new0(struct ElfBinaryDataEntry, 1);
+ dataentry->data = data;
+ dataentry->datalen = datalen;
+ dataentry->id = id;
+
+ QSLIST_INSERT_HEAD(&ebpf_elf_obj_list, dataentry, node);
+}
+
+const void *ebpf_find_binary_by_id(int id, size_t *sz, Error **errp)
+{
+ struct ElfBinaryDataEntry *it = NULL;
+ QSLIST_FOREACH(it, &ebpf_elf_obj_list, node) {
+ if (id == it->id) {
+ *sz = it->datalen;
+ return it->data;
+ }
+ }
+
+ error_setg(errp, "can't find eBPF object with id: %d", id);
+
+ return NULL;
+}
+
+EbpfObject *qmp_request_ebpf(EbpfProgramID id, Error **errp)
+{
+ EbpfObject *ret = NULL;
+ size_t size = 0;
+ const void *data = ebpf_find_binary_by_id(id, &size, errp);
+ if (!data) {
+ return NULL;
+ }
+
+ ret = g_new0(EbpfObject, 1);
+ ret->object = g_base64_encode(data, size);
+
+ return ret;
+}
diff --git a/ebpf/ebpf.h b/ebpf/ebpf.h
new file mode 100644
index 00000000000..b6266b28b8c
--- /dev/null
+++ b/ebpf/ebpf.h
@@ -0,0 +1,31 @@
+/*
+ * QEMU eBPF binary declaration routine.
+ *
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
+ *
+ * Authors:
+ * Andrew Melnychenko <andrew@daynix.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#ifndef EBPF_H
+#define EBPF_H
+
+struct Error;
+
+void ebpf_register_binary_data(int id, const void *data,
+ size_t datalen);
+const void *ebpf_find_binary_by_id(int id, size_t *sz,
+ struct Error **errp);
+
+#define ebpf_binary_init(id, fn) \
+static void __attribute__((constructor)) ebpf_binary_init_ ## fn(void) \
+{ \
+ size_t datalen = 0; \
+ const void *data = fn(&datalen); \
+ ebpf_register_binary_data(id, data, datalen); \
+}
+
+#endif /* EBPF_H */
diff --git a/ebpf/ebpf_rss.c b/ebpf/ebpf_rss.c
index 24bc6cc409e..8679dc452df 100644
--- a/ebpf/ebpf_rss.c
+++ b/ebpf/ebpf_rss.c
@@ -13,6 +13,8 @@
#include "qemu/osdep.h"
#include "qemu/error-report.h"
+#include "qapi/qapi-types-misc.h"
+#include "qapi/qapi-commands-ebpf.h"
#include <bpf/libbpf.h>
#include <bpf/bpf.h>
@@ -21,6 +23,8 @@
#include "ebpf/ebpf_rss.h"
#include "ebpf/rss.bpf.skeleton.h"
+#include "ebpf/ebpf.h"
+
#include "trace.h"
void ebpf_rss_init(struct EBPFRSSContext *ctx)
@@ -261,3 +265,5 @@ void ebpf_rss_unload(struct EBPFRSSContext *ctx)
ctx->map_toeplitz_key = -1;
ctx->map_indirections_table = -1;
}
+
+ebpf_binary_init(EBPF_PROGRAMID_RSS, rss_bpf__elf_bytes)
diff --git a/ebpf/meson.build b/ebpf/meson.build
index 2dd0fd89480..272ec2d5311 100644
--- a/ebpf/meson.build
+++ b/ebpf/meson.build
@@ -1 +1 @@
-softmmu_ss.add(when: libbpf, if_true: files('ebpf_rss.c'), if_false:
files('ebpf_rss-stub.c'))
+softmmu_ss.add(when: libbpf, if_true: files('ebpf.c', 'ebpf_rss.c'), if_false:
files('ebpf_rss-stub.c'))
--
2.39.1
- [PATCH v3 0/6] eBPF RSS through QMP support., Andrew Melnychenko, 2023/06/14
- [PATCH v3 1/6] ebpf: Added eBPF map update through mmap., Andrew Melnychenko, 2023/06/14
- [PATCH v3 2/6] ebpf: Added eBPF initialization by fds., Andrew Melnychenko, 2023/06/14
- [PATCH v3 3/6] virtio-net: Added property to load eBPF RSS with fds., Andrew Melnychenko, 2023/06/14
- [PATCH v3 5/6] qmp: Added new command to retrieve eBPF blob., Andrew Melnychenko, 2023/06/14
- [PATCH v3 4/6] ebpf: Added declaration/initialization routines.,
Andrew Melnychenko <=
- [PATCH v3 6/6] ebpf: Updated eBPF program and skeleton., Andrew Melnychenko, 2023/06/14
- Re: [PATCH v3 0/6] eBPF RSS through QMP support., Jason Wang, 2023/06/30
Re: [PATCH v3 0/6] eBPF RSS through QMP support., Jason Wang, 2023/06/30