Andrew Melnychenko | e88899f | 2024-03-12 18:57:57 +0800 | [diff] [blame] | 1 | /* |
| 2 | * QEMU eBPF binary declaration routine. |
| 3 | * |
| 4 | * Developed by Daynix Computing LTD (http://www.daynix.com) |
| 5 | * |
| 6 | * Authors: |
| 7 | * Andrew Melnychenko <andrew@daynix.com> |
| 8 | * |
| 9 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 10 | */ |
| 11 | |
| 12 | #include "qemu/osdep.h" |
| 13 | #include "qemu/queue.h" |
| 14 | #include "qapi/error.h" |
| 15 | #include "qapi/qapi-commands-ebpf.h" |
| 16 | #include "ebpf/ebpf.h" |
| 17 | |
| 18 | typedef struct ElfBinaryDataEntry { |
| 19 | int id; |
| 20 | const void *data; |
| 21 | size_t datalen; |
| 22 | |
| 23 | QSLIST_ENTRY(ElfBinaryDataEntry) node; |
| 24 | } ElfBinaryDataEntry; |
| 25 | |
| 26 | static QSLIST_HEAD(, ElfBinaryDataEntry) ebpf_elf_obj_list = |
| 27 | QSLIST_HEAD_INITIALIZER(); |
| 28 | |
| 29 | void ebpf_register_binary_data(int id, const void *data, size_t datalen) |
| 30 | { |
| 31 | struct ElfBinaryDataEntry *dataentry = NULL; |
| 32 | |
| 33 | dataentry = g_new0(struct ElfBinaryDataEntry, 1); |
| 34 | dataentry->data = data; |
| 35 | dataentry->datalen = datalen; |
| 36 | dataentry->id = id; |
| 37 | |
| 38 | QSLIST_INSERT_HEAD(&ebpf_elf_obj_list, dataentry, node); |
| 39 | } |
| 40 | |
| 41 | const void *ebpf_find_binary_by_id(int id, size_t *sz, Error **errp) |
| 42 | { |
| 43 | struct ElfBinaryDataEntry *it = NULL; |
| 44 | QSLIST_FOREACH(it, &ebpf_elf_obj_list, node) { |
| 45 | if (id == it->id) { |
| 46 | *sz = it->datalen; |
| 47 | return it->data; |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | error_setg(errp, "can't find eBPF object with id: %d", id); |
| 52 | |
| 53 | return NULL; |
| 54 | } |
| 55 | |
| 56 | EbpfObject *qmp_request_ebpf(EbpfProgramID id, Error **errp) |
| 57 | { |
| 58 | EbpfObject *ret = NULL; |
| 59 | size_t size = 0; |
| 60 | const void *data = ebpf_find_binary_by_id(id, &size, errp); |
| 61 | if (!data) { |
| 62 | return NULL; |
| 63 | } |
| 64 | |
| 65 | ret = g_new0(EbpfObject, 1); |
| 66 | ret->object = g_base64_encode(data, size); |
| 67 | |
| 68 | return ret; |
| 69 | } |