4aee6110bb
Some NIC drivers support MBUF_FAST_FREE (device supports optimization for fast release of mbufs. When set, application must guarantee that per-queue all mbufs comes from the same mempool, has refcnt = 1, direct and non-segmented.) offload. In order to adapt to this offload function, add this API. Add some test data for this API. Signed-off-by: Huichao Cai <chcchc88@163.com> Acked-by: Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>
312 lines
8.8 KiB
C
312 lines
8.8 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#ifndef _RTE_IP_FRAG_H_
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#define _RTE_IP_FRAG_H_
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/**
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* @file
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* RTE IP Fragmentation and Reassembly
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*
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* Implementation of IP packet fragmentation and reassembly.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <stdio.h>
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#include <rte_config.h>
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#include <rte_malloc.h>
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#include <rte_memory.h>
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#include <rte_ip.h>
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#include <rte_byteorder.h>
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struct rte_mbuf;
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/** death row size (in packets) */
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#define RTE_IP_FRAG_DEATH_ROW_LEN 32
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/** death row size in mbufs */
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#define RTE_IP_FRAG_DEATH_ROW_MBUF_LEN \
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(RTE_IP_FRAG_DEATH_ROW_LEN * (RTE_LIBRTE_IP_FRAG_MAX_FRAG + 1))
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/** mbuf death row (packets to be freed) */
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struct rte_ip_frag_death_row {
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uint32_t cnt; /**< number of mbufs currently on death row */
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struct rte_mbuf *row[RTE_IP_FRAG_DEATH_ROW_MBUF_LEN];
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/**< mbufs to be freed */
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};
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/**
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* Create a new IP fragmentation table.
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*
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* @param bucket_num
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* Number of buckets in the hash table.
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* @param bucket_entries
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* Number of entries per bucket (e.g. hash associativity).
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* Should be power of two.
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* @param max_entries
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* Maximum number of entries that could be stored in the table.
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* The value should be less or equal then bucket_num * bucket_entries.
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* @param max_cycles
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* Maximum TTL in cycles for each fragmented packet.
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* @param socket_id
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* The *socket_id* argument is the socket identifier in the case of
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* NUMA. The value can be *SOCKET_ID_ANY* if there is no NUMA constraints.
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* @return
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* The pointer to the new allocated fragmentation table, on success. NULL on error.
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*/
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struct rte_ip_frag_tbl * rte_ip_frag_table_create(uint32_t bucket_num,
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uint32_t bucket_entries, uint32_t max_entries,
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uint64_t max_cycles, int socket_id);
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/**
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* Free allocated IP fragmentation table.
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*
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* @param tbl
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* Fragmentation table to free.
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*/
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void
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rte_ip_frag_table_destroy(struct rte_ip_frag_tbl *tbl);
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/**
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* This function implements the fragmentation of IPv6 packets.
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*
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* @param pkt_in
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* The input packet.
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* @param pkts_out
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* Array storing the output fragments.
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* @param nb_pkts_out
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* Number of fragments.
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* @param mtu_size
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* Size in bytes of the Maximum Transfer Unit (MTU) for the outgoing IPv6
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* datagrams. This value includes the size of the IPv6 header.
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* @param pool_direct
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* MBUF pool used for allocating direct buffers for the output fragments.
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* @param pool_indirect
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* MBUF pool used for allocating indirect buffers for the output fragments.
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* @return
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* Upon successful completion - number of output fragments placed
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* in the pkts_out array.
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* Otherwise - (-1) * errno.
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*/
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int32_t
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rte_ipv6_fragment_packet(struct rte_mbuf *pkt_in,
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struct rte_mbuf **pkts_out,
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uint16_t nb_pkts_out,
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uint16_t mtu_size,
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struct rte_mempool *pool_direct,
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struct rte_mempool *pool_indirect);
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/**
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* This function implements reassembly of fragmented IPv6 packets.
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* Incoming mbuf should have its l2_len/l3_len fields setup correctly.
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*
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* @param tbl
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* Table where to lookup/add the fragmented packet.
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* @param dr
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* Death row to free buffers to
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* @param mb
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* Incoming mbuf with IPv6 fragment.
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* @param tms
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* Fragment arrival timestamp.
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* @param ip_hdr
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* Pointer to the IPv6 header.
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* @param frag_hdr
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* Pointer to the IPv6 fragment extension header.
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* @return
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* Pointer to mbuf for reassembled packet, or NULL if:
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* - an error occurred.
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* - not all fragments of the packet are collected yet.
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*/
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struct rte_mbuf *rte_ipv6_frag_reassemble_packet(struct rte_ip_frag_tbl *tbl,
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struct rte_ip_frag_death_row *dr,
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struct rte_mbuf *mb, uint64_t tms, struct rte_ipv6_hdr *ip_hdr,
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struct rte_ipv6_fragment_ext *frag_hdr);
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/**
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* Return a pointer to the packet's fragment header, if found.
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* It only looks at the extension header that's right after the fixed IPv6
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* header, and doesn't follow the whole chain of extension headers.
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*
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* @param hdr
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* Pointer to the IPv6 header.
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* @return
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* Pointer to the IPv6 fragment extension header, or NULL if it's not
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* present.
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*/
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static inline struct rte_ipv6_fragment_ext *
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rte_ipv6_frag_get_ipv6_fragment_header(struct rte_ipv6_hdr *hdr)
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{
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if (hdr->proto == IPPROTO_FRAGMENT) {
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return (struct rte_ipv6_fragment_ext *) ++hdr;
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}
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else
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return NULL;
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}
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/**
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* IPv4 fragmentation.
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*
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* This function implements the fragmentation of IPv4 packets.
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*
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* @param pkt_in
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* The input packet.
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* @param pkts_out
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* Array storing the output fragments.
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* @param nb_pkts_out
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* Number of fragments.
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* @param mtu_size
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* Size in bytes of the Maximum Transfer Unit (MTU) for the outgoing IPv4
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* datagrams. This value includes the size of the IPv4 header.
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* @param pool_direct
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* MBUF pool used for allocating direct buffers for the output fragments.
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* @param pool_indirect
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* MBUF pool used for allocating indirect buffers for the output fragments.
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* @return
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* Upon successful completion - number of output fragments placed
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* in the pkts_out array.
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* Otherwise - (-1) * errno.
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*/
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int32_t rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
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struct rte_mbuf **pkts_out,
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uint16_t nb_pkts_out, uint16_t mtu_size,
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struct rte_mempool *pool_direct,
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struct rte_mempool *pool_indirect);
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/**
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* IPv4 fragmentation by copy.
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*
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* This function implements the fragmentation of IPv4 packets by copy
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* non-segmented mbuf.
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* This function is mainly used to adapt Tx MBUF_FAST_FREE offload.
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* MBUF_FAST_FREE: Device supports optimization for fast release of mbufs.
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* When set, application must guarantee that per-queue all mbufs comes from
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* the same mempool, has refcnt = 1, direct and non-segmented.
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*
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* @param pkt_in
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* The input packet.
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* @param pkts_out
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* Array storing the output fragments.
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* @param nb_pkts_out
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* Number of fragments.
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* @param mtu_size
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* Size in bytes of the Maximum Transfer Unit (MTU) for the outgoing IPv4
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* datagrams. This value includes the size of the IPv4 header.
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* @param pool_direct
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* MBUF pool used for allocating direct buffers for the output fragments.
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* @return
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* Upon successful completion - number of output fragments placed
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* in the pkts_out array.
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* Otherwise - (-1) * errno.
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*/
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__rte_experimental
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int32_t
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rte_ipv4_fragment_copy_nonseg_packet(struct rte_mbuf *pkt_in,
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struct rte_mbuf **pkts_out,
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uint16_t nb_pkts_out,
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uint16_t mtu_size,
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struct rte_mempool *pool_direct);
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/**
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* This function implements reassembly of fragmented IPv4 packets.
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* Incoming mbufs should have its l2_len/l3_len fields setup correctly.
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*
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* @param tbl
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* Table where to lookup/add the fragmented packet.
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* @param dr
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* Death row to free buffers to
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* @param mb
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* Incoming mbuf with IPv4 fragment.
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* @param tms
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* Fragment arrival timestamp.
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* @param ip_hdr
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* Pointer to the IPV4 header inside the fragment.
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* @return
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* Pointer to mbuf for reassembled packet, or NULL if:
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* - an error occurred.
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* - not all fragments of the packet are collected yet.
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*/
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struct rte_mbuf * rte_ipv4_frag_reassemble_packet(struct rte_ip_frag_tbl *tbl,
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struct rte_ip_frag_death_row *dr,
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struct rte_mbuf *mb, uint64_t tms, struct rte_ipv4_hdr *ip_hdr);
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/**
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* Check if the IPv4 packet is fragmented
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*
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* @param hdr
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* IPv4 header of the packet
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* @return
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* 1 if fragmented, 0 if not fragmented
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*/
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static inline int
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rte_ipv4_frag_pkt_is_fragmented(const struct rte_ipv4_hdr *hdr)
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{
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uint16_t flag_offset, ip_flag, ip_ofs;
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flag_offset = rte_be_to_cpu_16(hdr->fragment_offset);
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ip_ofs = (uint16_t)(flag_offset & RTE_IPV4_HDR_OFFSET_MASK);
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ip_flag = (uint16_t)(flag_offset & RTE_IPV4_HDR_MF_FLAG);
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return ip_flag != 0 || ip_ofs != 0;
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}
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/**
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* Free mbufs on a given death row.
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*
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* @param dr
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* Death row to free mbufs in.
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* @param prefetch
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* How many buffers to prefetch before freeing.
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*/
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void rte_ip_frag_free_death_row(struct rte_ip_frag_death_row *dr,
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uint32_t prefetch);
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/**
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* Dump fragmentation table statistics to file.
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*
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* @param f
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* File to dump statistics to
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* @param tbl
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* Fragmentation table to dump statistics from
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*/
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void
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rte_ip_frag_table_statistics_dump(FILE * f, const struct rte_ip_frag_tbl *tbl);
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/**
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* Delete expired fragments
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*
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* @param tbl
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* Table to delete expired fragments from
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* @param dr
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* Death row to free buffers to
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* @param tms
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* Current timestamp
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*/
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__rte_experimental
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void
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rte_ip_frag_table_del_expired_entries(struct rte_ip_frag_tbl *tbl,
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struct rte_ip_frag_death_row *dr, uint64_t tms);
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/**@{@name Obsolete macros, kept here for compatibility reasons.
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* Will be deprecated/removed in future DPDK releases.
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*/
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/** Obsolete */
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#define IP_FRAG_DEATH_ROW_LEN RTE_IP_FRAG_DEATH_ROW_LEN
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/** Obsolete */
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#define IP_FRAG_DEATH_ROW_MBUF_LEN RTE_IP_FRAG_DEATH_ROW_MBUF_LEN
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/** Obsolete */
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#define ipv6_extension_fragment rte_ipv6_fragment_ext
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/**@}*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTE_IP_FRAG_H_ */
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