qemu

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/*
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 * QEMU eBPF binary declaration routine.
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 *
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 * Developed by Daynix Computing LTD (http://www.daynix.com)
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 *
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 * Authors:
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 *  Andrew Melnychenko <andrew@daynix.com>
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 *
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 * SPDX-License-Identifier: GPL-2.0-or-later
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 */
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#include "qemu/osdep.h"
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#include "qemu/queue.h"
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#include "qapi/error.h"
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#include "qapi/qapi-commands-ebpf.h"
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#include "ebpf/ebpf.h"
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typedef struct ElfBinaryDataEntry {
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    int id;
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    const void *data;
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    size_t datalen;
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    QSLIST_ENTRY(ElfBinaryDataEntry) node;
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} ElfBinaryDataEntry;
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static QSLIST_HEAD(, ElfBinaryDataEntry) ebpf_elf_obj_list =
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                                            QSLIST_HEAD_INITIALIZER();
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void ebpf_register_binary_data(int id, const void *data, size_t datalen)
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{
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    struct ElfBinaryDataEntry *dataentry = NULL;
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    dataentry = g_new0(struct ElfBinaryDataEntry, 1);
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    dataentry->data = data;
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    dataentry->datalen = datalen;
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    dataentry->id = id;
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    QSLIST_INSERT_HEAD(&ebpf_elf_obj_list, dataentry, node);
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}
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const void *ebpf_find_binary_by_id(int id, size_t *sz, Error **errp)
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{
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    struct ElfBinaryDataEntry *it = NULL;
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    QSLIST_FOREACH(it, &ebpf_elf_obj_list, node) {
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        if (id == it->id) {
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            *sz = it->datalen;
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            return it->data;
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        }
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    }
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    error_setg(errp, "can't find eBPF object with id: %d", id);
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    return NULL;
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}
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EbpfObject *qmp_request_ebpf(EbpfProgramID id, Error **errp)
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{
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    EbpfObject *ret = NULL;
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    size_t size = 0;
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    const void *data = ebpf_find_binary_by_id(id, &size, errp);
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    if (!data) {
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        return NULL;
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    }
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    ret = g_new0(EbpfObject, 1);
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    ret->object = g_base64_encode(data, size);
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    return ret;
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}
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