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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2018 Intel Corporation
*/
#ifndef _RTE_BPF_ETHDEV_H_
#define _RTE_BPF_ETHDEV_H_
/**
* @file rte_bpf_ethdev.h
* @b EXPERIMENTAL: this API may change without prior notice
*
* API to install BPF filter as RX/TX callbacks for eth devices.
* Note that right now:
* - it is not MT safe, i.e. it is not allowed to do load/unload for the
* same port/queue from different threads in parallel.
* - though it allows to do load/unload at runtime
* (while RX/TX is ongoing on given port/queue).
* - allows only one BPF program per port/queue,
* i.e. new load will replace previously loaded for that port/queue BPF program.
* Filter behaviour - if BPF program returns zero value for a given packet,
* then it will be dropped inside callback and no further processing
* on RX - it will be dropped inside callback and no further processing
* for that packet will happen.
* on TX - packet will remain unsent, and it is responsibility of the user
* to handle such situation (drop, try to send again, etc.).
*/
#include <rte_bpf.h>
#ifdef __cplusplus
extern "C" {
#endif
enum {
RTE_BPF_ETH_F_NONE = 0,
RTE_BPF_ETH_F_JIT = 0x1, /*< use compiled into native ISA code */
};
/**
* Unload previously loaded BPF program (if any) from given RX port/queue
* and remove appropriate RX port/queue callback.
*
* @param port
* The identifier of the ethernet port
* @param queue
* The identifier of the RX queue on the given port
*/
void __rte_experimental
rte_bpf_eth_rx_unload(uint16_t port, uint16_t queue);
/**
* Unload previously loaded BPF program (if any) from given TX port/queue
* and remove appropriate TX port/queue callback.
*
* @param port
* The identifier of the ethernet port
* @param queue
* The identifier of the TX queue on the given port
*/
void __rte_experimental
rte_bpf_eth_tx_unload(uint16_t port, uint16_t queue);
/**
* Load BPF program from the ELF file and install callback to execute it
* on given RX port/queue.
*
* @param port
* The identifier of the ethernet port
* @param queue
* The identifier of the RX queue on the given port
* @param fname
* Pathname for a ELF file.
* @param sname
* Name of the executable section within the file to load.
* @param prm
* Parameters used to create and initialise the BPF execution context.
* @param flags
* Flags that define expected behavior of the loaded filter
* (i.e. jited/non-jited version to use).
* @return
* Zero on successful completion or negative error code otherwise.
*/
int __rte_experimental
rte_bpf_eth_rx_elf_load(uint16_t port, uint16_t queue,
const struct rte_bpf_prm *prm, const char *fname, const char *sname,
uint32_t flags);
/**
* Load BPF program from the ELF file and install callback to execute it
* on given TX port/queue.
*
* @param port
* The identifier of the ethernet port
* @param queue
* The identifier of the TX queue on the given port
* @param fname
* Pathname for a ELF file.
* @param sname
* Name of the executable section within the file to load.
* @param prm
* Parameters used to create and initialise the BPF execution context.
* @param flags
* Flags that define expected expected behavior of the loaded filter
* (i.e. jited/non-jited version to use).
* @return
* Zero on successful completion or negative error code otherwise.
*/
int __rte_experimental
rte_bpf_eth_tx_elf_load(uint16_t port, uint16_t queue,
const struct rte_bpf_prm *prm, const char *fname, const char *sname,
uint32_t flags);
#ifdef __cplusplus
}
#endif
#endif /* _RTE_BPF_ETHDEV_H_ */
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