ebpf_registry.h

/*
 * Copyright 2018 VMware, Inc.
 * SPDX-FileCopyrightText: 2018 VMware, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#ifndef BACKENDS_EBPF_RUNTIME_EBPF_REGISTRY_H_
#define BACKENDS_EBPF_RUNTIME_EBPF_REGISTRY_H_
 
#include "ebpf_map.h"
 
#define MAX_TABLE_NAME_LENGTH 256  // maximum length of the table name

struct bpf_table {
    char *name;                 // table name longer than VAR_SIZE is not accessed
    unsigned int type;          // currently only hashmap is supported
    unsigned int key_size;      // size of the key structure
    unsigned int value_size;    // size of the value structure
    unsigned int max_entries;   // Maximum of possible entries
    struct bpf_map *bpf_map;    // Pointer to the actual hash map
};

int registry_add(struct bpf_table *tbl);

int registry_delete_tbl(const char *name);

void registry_delete();

struct bpf_table *registry_lookup_table(const char *name);

struct bpf_table *registry_lookup_table_id(int tbl_id);

int registry_get_id(const char *name);

int registry_update_table(const char *name, void *key, void *value, unsigned long long flags);

int registry_update_table_id(int tbl_id, void *key, void *value, unsigned long long flags);

int registry_delete_table_elem(const char *name, void *key);

int registry_delete_table_elem_id(int tbl_id, void *key);

void *registry_lookup_table_elem(const char *name, void *key);

void *registry_lookup_table_elem_id(int tbl_id, void *key);
 
#endif  // BACKENDS_EBPF_RUNTIME_EBPF_REGISTRY_H_