LCOV - code coverage report
Current view: top level - lib/gso - gso_tunnel_udp4.c (source / functions) Hit Total Coverage
Test: Code coverage Lines: 0 31 0.0 %
Date: 2024-12-01 18:57:19 Functions: 0 2 0.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 0 18 0.0 %

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: BSD-3-Clause
       2                 :            :  * Copyright(c) 2020 Inspur Corporation
       3                 :            :  */
       4                 :            : 
       5                 :            : #include "gso_common.h"
       6                 :            : #include "gso_tunnel_udp4.h"
       7                 :            : 
       8                 :            : #define IPV4_HDR_MF_BIT (1U << 13)
       9                 :            : 
      10                 :            : static void
      11                 :          0 : update_tunnel_ipv4_udp_headers(struct rte_mbuf *pkt, struct rte_mbuf **segs,
      12                 :            :                                uint16_t nb_segs)
      13                 :            : {
      14                 :            :         struct rte_ipv4_hdr *ipv4_hdr;
      15                 :            :         uint16_t outer_id, inner_id, tail_idx, i, length;
      16                 :            :         uint16_t outer_ipv4_offset, inner_ipv4_offset;
      17                 :            :         uint16_t outer_udp_offset;
      18                 :            :         uint16_t frag_offset = 0, is_mf;
      19                 :            : 
      20                 :          0 :         outer_ipv4_offset = pkt->outer_l2_len;
      21                 :          0 :         outer_udp_offset = outer_ipv4_offset + pkt->outer_l3_len;
      22                 :          0 :         inner_ipv4_offset = outer_udp_offset + pkt->l2_len;
      23                 :            : 
      24                 :            :         /* Outer IPv4 header. */
      25                 :          0 :         ipv4_hdr = rte_pktmbuf_mtod_offset(pkt, struct rte_ipv4_hdr *,
      26                 :            :                                            outer_ipv4_offset);
      27         [ #  # ]:          0 :         outer_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
      28                 :            : 
      29                 :            :         /* Inner IPv4 header. */
      30                 :          0 :         ipv4_hdr = rte_pktmbuf_mtod_offset(pkt, struct rte_ipv4_hdr *,
      31                 :            :                                            inner_ipv4_offset);
      32         [ #  # ]:          0 :         inner_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
      33                 :            : 
      34                 :          0 :         tail_idx = nb_segs - 1;
      35                 :            : 
      36         [ #  # ]:          0 :         for (i = 0; i < nb_segs; i++) {
      37                 :          0 :                 update_ipv4_header(segs[i], outer_ipv4_offset, outer_id);
      38                 :            :                 update_udp_header(segs[i], outer_udp_offset);
      39                 :          0 :                 update_ipv4_header(segs[i], inner_ipv4_offset, inner_id);
      40                 :            :                 /* For the case inner packet is UDP, we must keep UDP
      41                 :            :                  * datagram boundary, it must be handled as IP fragment.
      42                 :            :                  *
      43                 :            :                  * Set IP fragment offset for inner IP header.
      44                 :            :                  */
      45                 :          0 :                 ipv4_hdr = rte_pktmbuf_mtod_offset(segs[i],
      46                 :            :                                                    struct rte_ipv4_hdr *,
      47                 :            :                                                    inner_ipv4_offset);
      48         [ #  # ]:          0 :                 is_mf = i < tail_idx ? IPV4_HDR_MF_BIT : 0;
      49                 :          0 :                 ipv4_hdr->fragment_offset =
      50         [ #  # ]:          0 :                         rte_cpu_to_be_16(frag_offset | is_mf);
      51                 :          0 :                 length = segs[i]->pkt_len - inner_ipv4_offset - pkt->l3_len;
      52                 :          0 :                 frag_offset += (length >> 3);
      53                 :          0 :                 outer_id++;
      54                 :            :         }
      55                 :          0 : }
      56                 :            : 
      57                 :            : int
      58                 :          0 : gso_tunnel_udp4_segment(struct rte_mbuf *pkt,
      59                 :            :                 uint16_t gso_size,
      60                 :            :                 struct rte_mempool *direct_pool,
      61                 :            :                 struct rte_mempool *indirect_pool,
      62                 :            :                 struct rte_mbuf **pkts_out,
      63                 :            :                 uint16_t nb_pkts_out)
      64                 :            : {
      65                 :            :         struct rte_ipv4_hdr *inner_ipv4_hdr;
      66                 :            :         uint16_t pyld_unit_size, hdr_offset, frag_off;
      67                 :            :         int ret;
      68                 :            : 
      69                 :          0 :         hdr_offset = pkt->outer_l2_len + pkt->outer_l3_len + pkt->l2_len;
      70                 :          0 :         inner_ipv4_hdr = rte_pktmbuf_mtod_offset(pkt, struct rte_ipv4_hdr *,
      71                 :            :                                                  hdr_offset);
      72                 :            :         /*
      73                 :            :          * Don't process the packet whose MF bit or offset in the inner
      74                 :            :          * IPv4 header are non-zero.
      75                 :            :          */
      76         [ #  # ]:          0 :         frag_off = rte_be_to_cpu_16(inner_ipv4_hdr->fragment_offset);
      77         [ #  # ]:          0 :         if (unlikely(IS_FRAGMENTED(frag_off)))
      78                 :            :                 return 0;
      79                 :            : 
      80                 :          0 :         hdr_offset += pkt->l3_len;
      81                 :            :         /* Don't process the packet without data */
      82         [ #  # ]:          0 :         if ((hdr_offset + pkt->l4_len) >= pkt->pkt_len)
      83                 :            :                 return 0;
      84                 :            : 
      85                 :            :         /* pyld_unit_size must be a multiple of 8 because frag_off
      86                 :            :          * uses 8 bytes as unit.
      87                 :            :          */
      88                 :          0 :         pyld_unit_size = (gso_size - hdr_offset) & ~7U;
      89                 :            : 
      90                 :            :         /* Segment the payload */
      91                 :          0 :         ret = gso_do_segment(pkt, hdr_offset, pyld_unit_size, direct_pool,
      92                 :            :                         indirect_pool, pkts_out, nb_pkts_out);
      93         [ #  # ]:          0 :         if (ret > 1)
      94                 :          0 :                 update_tunnel_ipv4_udp_headers(pkt, pkts_out, ret);
      95                 :            : 
      96                 :            :         return ret;
      97                 :            : }

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