99a2dd955f
There is no reason for the DPDK libraries to all have 'librte_' prefix on the directory names. This prefix makes the directory names longer and also makes it awkward to add features referring to individual libraries in the build - should the lib names be specified with or without the prefix. Therefore, we can just remove the library prefix and use the library's unique name as the directory name, i.e. 'eal' rather than 'librte_eal' Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
|
|
* Copyright(c) 2020 Inspur Corporation
|
|
*/
|
|
|
|
#include "gso_common.h"
|
|
#include "gso_tunnel_udp4.h"
|
|
|
|
#define IPV4_HDR_MF_BIT (1U << 13)
|
|
|
|
static void
|
|
update_tunnel_ipv4_udp_headers(struct rte_mbuf *pkt, struct rte_mbuf **segs,
|
|
uint16_t nb_segs)
|
|
{
|
|
struct rte_ipv4_hdr *ipv4_hdr;
|
|
uint16_t outer_id, inner_id, tail_idx, i, length;
|
|
uint16_t outer_ipv4_offset, inner_ipv4_offset;
|
|
uint16_t outer_udp_offset;
|
|
uint16_t frag_offset = 0, is_mf;
|
|
|
|
outer_ipv4_offset = pkt->outer_l2_len;
|
|
outer_udp_offset = outer_ipv4_offset + pkt->outer_l3_len;
|
|
inner_ipv4_offset = outer_udp_offset + pkt->l2_len;
|
|
|
|
/* Outer IPv4 header. */
|
|
ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
|
|
outer_ipv4_offset);
|
|
outer_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
|
|
|
|
/* Inner IPv4 header. */
|
|
ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
|
|
inner_ipv4_offset);
|
|
inner_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
|
|
|
|
tail_idx = nb_segs - 1;
|
|
|
|
for (i = 0; i < nb_segs; i++) {
|
|
update_ipv4_header(segs[i], outer_ipv4_offset, outer_id);
|
|
update_udp_header(segs[i], outer_udp_offset);
|
|
update_ipv4_header(segs[i], inner_ipv4_offset, inner_id);
|
|
/* For the case inner packet is UDP, we must keep UDP
|
|
* datagram boundary, it must be handled as IP fragment.
|
|
*
|
|
* Set IP fragment offset for inner IP header.
|
|
*/
|
|
ipv4_hdr = (struct rte_ipv4_hdr *)
|
|
(rte_pktmbuf_mtod(segs[i], char *) +
|
|
inner_ipv4_offset);
|
|
is_mf = i < tail_idx ? IPV4_HDR_MF_BIT : 0;
|
|
ipv4_hdr->fragment_offset =
|
|
rte_cpu_to_be_16(frag_offset | is_mf);
|
|
length = segs[i]->pkt_len - inner_ipv4_offset - pkt->l3_len;
|
|
frag_offset += (length >> 3);
|
|
outer_id++;
|
|
}
|
|
}
|
|
|
|
int
|
|
gso_tunnel_udp4_segment(struct rte_mbuf *pkt,
|
|
uint16_t gso_size,
|
|
struct rte_mempool *direct_pool,
|
|
struct rte_mempool *indirect_pool,
|
|
struct rte_mbuf **pkts_out,
|
|
uint16_t nb_pkts_out)
|
|
{
|
|
struct rte_ipv4_hdr *inner_ipv4_hdr;
|
|
uint16_t pyld_unit_size, hdr_offset, frag_off;
|
|
int ret;
|
|
|
|
hdr_offset = pkt->outer_l2_len + pkt->outer_l3_len + pkt->l2_len;
|
|
inner_ipv4_hdr = (struct rte_ipv4_hdr *)(rte_pktmbuf_mtod(pkt, char *) +
|
|
hdr_offset);
|
|
/*
|
|
* Don't process the packet whose MF bit or offset in the inner
|
|
* IPv4 header are non-zero.
|
|
*/
|
|
frag_off = rte_be_to_cpu_16(inner_ipv4_hdr->fragment_offset);
|
|
if (unlikely(IS_FRAGMENTED(frag_off)))
|
|
return 0;
|
|
|
|
hdr_offset += pkt->l3_len;
|
|
/* Don't process the packet without data */
|
|
if ((hdr_offset + pkt->l4_len) >= pkt->pkt_len)
|
|
return 0;
|
|
|
|
/* pyld_unit_size must be a multiple of 8 because frag_off
|
|
* uses 8 bytes as unit.
|
|
*/
|
|
pyld_unit_size = (gso_size - hdr_offset) & ~7U;
|
|
|
|
/* Segment the payload */
|
|
ret = gso_do_segment(pkt, hdr_offset, pyld_unit_size, direct_pool,
|
|
indirect_pool, pkts_out, nb_pkts_out);
|
|
if (ret > 1)
|
|
update_tunnel_ipv4_udp_headers(pkt, pkts_out, ret);
|
|
|
|
return ret;
|
|
}
|