mirror of https://github.com/F-Stack/f-stack.git
111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2017 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <errno.h>
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#include <rte_log.h>
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#include <rte_ethdev.h>
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#include "rte_gso.h"
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#include "gso_common.h"
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#include "gso_tcp4.h"
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#include "gso_tunnel_tcp4.h"
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int
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rte_gso_segment(struct rte_mbuf *pkt,
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const struct rte_gso_ctx *gso_ctx,
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struct rte_mbuf **pkts_out,
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uint16_t nb_pkts_out)
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{
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struct rte_mempool *direct_pool, *indirect_pool;
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struct rte_mbuf *pkt_seg;
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uint64_t ol_flags;
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uint16_t gso_size;
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uint8_t ipid_delta;
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int ret = 1;
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if (pkt == NULL || pkts_out == NULL || gso_ctx == NULL ||
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nb_pkts_out < 1 ||
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gso_ctx->gso_size < RTE_GSO_SEG_SIZE_MIN ||
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((gso_ctx->gso_types & (DEV_TX_OFFLOAD_TCP_TSO |
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DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
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DEV_TX_OFFLOAD_GRE_TNL_TSO)) == 0))
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return -EINVAL;
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if (gso_ctx->gso_size >= pkt->pkt_len) {
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pkt->ol_flags &= (~PKT_TX_TCP_SEG);
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pkts_out[0] = pkt;
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return 1;
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}
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direct_pool = gso_ctx->direct_pool;
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indirect_pool = gso_ctx->indirect_pool;
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gso_size = gso_ctx->gso_size;
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ipid_delta = (gso_ctx->flag != RTE_GSO_FLAG_IPID_FIXED);
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ol_flags = pkt->ol_flags;
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if ((IS_IPV4_VXLAN_TCP4(pkt->ol_flags) &&
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(gso_ctx->gso_types & DEV_TX_OFFLOAD_VXLAN_TNL_TSO)) ||
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((IS_IPV4_GRE_TCP4(pkt->ol_flags) &&
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(gso_ctx->gso_types & DEV_TX_OFFLOAD_GRE_TNL_TSO)))) {
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pkt->ol_flags &= (~PKT_TX_TCP_SEG);
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ret = gso_tunnel_tcp4_segment(pkt, gso_size, ipid_delta,
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direct_pool, indirect_pool,
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pkts_out, nb_pkts_out);
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} else if (IS_IPV4_TCP(pkt->ol_flags) &&
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(gso_ctx->gso_types & DEV_TX_OFFLOAD_TCP_TSO)) {
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pkt->ol_flags &= (~PKT_TX_TCP_SEG);
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ret = gso_tcp4_segment(pkt, gso_size, ipid_delta,
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direct_pool, indirect_pool,
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pkts_out, nb_pkts_out);
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} else {
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/* unsupported packet, skip */
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pkts_out[0] = pkt;
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RTE_LOG(DEBUG, GSO, "Unsupported packet type\n");
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return 1;
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}
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if (ret > 1) {
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pkt_seg = pkt;
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while (pkt_seg) {
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rte_mbuf_refcnt_update(pkt_seg, -1);
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pkt_seg = pkt_seg->next;
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}
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} else if (ret < 0) {
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/* Revert the ol_flags in the event of failure. */
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pkt->ol_flags = ol_flags;
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}
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return ret;
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}
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