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/*
* Copyright (C) 2017-2025 Red Hat, Inc. All rights reserved.
*
* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
*
* This software licensed under LGPL-2.0+
*/
#ifndef __KNET_COMPRESS_MODEL_H__
#define __KNET_COMPRESS_MODEL_H__
#include "internals.h"
#define KNET_COMPRESS_MODEL_ABI 2
#define KNET_COMPRESS_UNKNOWN_DEFAULT (-2)
typedef struct {
uint8_t abi_ver;
/*
* some libs need special init and handling of buffers etc.
* is_init is called in shlib_rwlock read only context to see if
* the module has been initialized within this knet_handle.
* Providing is_init is optional. A module that does not export
* an is_init and if the associated shared library is already loaded
* is treated as "does not require init".
*/
int (*is_init) (knet_handle_t knet_h, int method_idx);
/*
* init is called when the library requires special init handling,
* such as memory allocation and such.
* init is invoked in shlib_rwlock write only context when
* the module exports this function.
* It is optional to provide an init function if the module
* does not require any init.
*/
int (*init) (knet_handle_t knet_h, int method_idx);
/*
* fini is invoked only on knet_handle_free in a write only context.
* It is optional to provide this function if the module
* does not require any finalization
*/
void (*fini) (knet_handle_t knet_h, int method_idx);
/*
* runtime config validation and compress/decompress
*/
/*
* val_level is called upon compress configuration changes
* to make sure that the requested compress_level is valid
* within the context of a given module.
*/
int (*val_level)(knet_handle_t knet_h,
int compress_level);
/*
* required functions
*
* hopefully those 2 don't require any explanation....
*/
int (*compress) (knet_handle_t knet_h,
const unsigned char *buf_in,
const ssize_t buf_in_len,
unsigned char *buf_out,
ssize_t *buf_out_len);
int (*decompress)(knet_handle_t knet_h,
const unsigned char *buf_in,
const ssize_t buf_in_len,
unsigned char *buf_out,
ssize_t *buf_out_len);
/*
* Get default compression level
*/
int (*get_default_level) (void);
} compress_ops_t;
typedef struct {
const char *model_name;
uint8_t model_id; /* sequential unique identifier */
uint8_t built_in; /* set at configure/build time to 1 if available */
/*
* library is loaded
*/
uint8_t loaded;
/*
* runtime bits
*/
compress_ops_t *ops;
} compress_model_t;
#endif
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