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