VNFs/DPPD-PROX/handle_dump.c

   1 /*
   2 // Copyright (c) 2010-2017 Intel Corporation
   3 //
   4 // Licensed under the Apache License, Version 2.0 (the "License");
   5 // you may not use this file except in compliance with the License.
   6 // You may obtain a copy of the License at
   7 //
   8 //     http://www.apache.org/licenses/LICENSE-2.0
   9 //
  10 // Unless required by applicable law or agreed to in writing, software
  11 // distributed under the License is distributed on an "AS IS" BASIS,
  12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 // See the License for the specific language governing permissions and
  14 // limitations under the License.
  15 */
  16
  17 #include <rte_cycles.h>
  18 #include <pcap.h>
  19
  20 #include "prox_malloc.h"
  21 #include "clock.h"
  22 #include "log.h"
  23 #include "lconf.h"
  24 #include "task_init.h"
  25 #include "task_base.h"
  26 #include "stats.h"
  27 #include "prox_compat.h"
  28
  29 struct task_dump {
  30         struct task_base base;
  31         uint32_t n_mbufs;
  32         struct rte_mbuf **mbufs;
  33         uint32_t n_pkts;
  34         char pcap_file[256];
  35 };
  36
  37 static uint16_t buffer_packets(struct task_dump *task, struct rte_mbuf **mbufs, uint16_t n_pkts)
  38 {
  39         uint16_t j = 0;
  40
  41         if (task->n_mbufs == task->n_pkts)
  42                 return 0;
  43
  44         for (j = 0; j < n_pkts && task->n_mbufs < task->n_pkts; ++j) {
  45                 mbufs[j]->udata64 = rte_rdtsc();
  46                 task->mbufs[task->n_mbufs++] = mbufs[j];
  47         }
  48
  49         return j;
  50 }
  51
  52 static int handle_dump_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
  53 {
  54         struct task_dump *task = (struct task_dump *)tbase;
  55         const uint16_t ofs = buffer_packets(task, mbufs, n_pkts);
  56
  57         for (uint16_t j = ofs; j < n_pkts; ++j)
  58                 rte_pktmbuf_free(mbufs[j]);
  59         TASK_STATS_ADD_DROP_DISCARD(&tbase->aux->stats, n_pkts - ofs);
  60         return n_pkts;
  61 }
  62
  63 static void init_task_dump(struct task_base *tbase, __attribute__((unused)) struct task_args *targ)
  64 {
  65         struct task_dump *task = (struct task_dump *)tbase;
  66         const int socket_id = rte_lcore_to_socket_id(targ->lconf->id);
  67
  68         if (targ->n_pkts == 0)
  69                 targ->n_pkts = 64 * 1024;
  70         task->mbufs = prox_zmalloc(sizeof(*task->mbufs) * targ->n_pkts, socket_id);
  71         task->n_pkts = targ->n_pkts;
  72         if (!strcmp(targ->pcap_file, "")) {
  73                 strcpy(targ->pcap_file, "out.pcap");
  74         }
  75         prox_strncpy(task->pcap_file, targ->pcap_file, sizeof(task->pcap_file));
  76 }
  77
  78 static void stop(struct task_base *tbase)
  79 {
  80         struct task_dump *task = (struct task_dump *)tbase;
  81         static pcap_dumper_t *pcap_dump_handle;
  82         pcap_t *handle;
  83         uint32_t n_pkts = 65536;
  84         struct pcap_pkthdr header = {{0}, 0, 0};
  85         static int once = 0;
  86         char err_str[PCAP_ERRBUF_SIZE];
  87         const uint64_t hz = rte_get_tsc_hz();
  88         struct timeval tv = {0};
  89         uint64_t tsc, beg = 0;
  90
  91         plogx_info("Dumping %d packets to '%s'\n", task->n_mbufs, task->pcap_file);
  92         handle = pcap_open_dead(DLT_EN10MB, n_pkts);
  93         pcap_dump_handle = pcap_dump_open(handle, task->pcap_file);
  94
  95         if (task->n_mbufs) {
  96                 beg = task->mbufs[0]->udata64;
  97         }
  98         for (uint32_t j = 0; j < task->n_mbufs; ++j) {
  99                 tsc = task->mbufs[j]->udata64 - beg;
 100                 header.len = rte_pktmbuf_pkt_len(task->mbufs[j]);
 101                 header.caplen = header.len;
 102                 tsc_to_tv(&header.ts, tsc);
 103                 pcap_dump((unsigned char *)pcap_dump_handle, &header, rte_pktmbuf_mtod(task->mbufs[j], void *));
 104         }
 105
 106         pcap_dump_close(pcap_dump_handle);
 107         pcap_close(handle);
 108         plogx_info("Dump complete, releasing mbufs\n");
 109
 110         uint32_t j = 0;
 111
 112         while (j + 64 < task->n_mbufs) {
 113                 tbase->tx_pkt(tbase, &task->mbufs[j], 64, NULL);
 114                 j += 64;
 115         }
 116         if (j < task->n_mbufs) {
 117                 tbase->tx_pkt(tbase, &task->mbufs[j], task->n_mbufs - j, NULL);
 118         }
 119         task->n_mbufs = 0;
 120 }
 121
 122 static struct task_init task_init_dump = {
 123         .mode_str = "dump",
 124         .init = init_task_dump,
 125         .handle = handle_dump_bulk,
 126         .stop = stop,
 127         .flag_features = TASK_FEATURE_ZERO_RX,
 128         .size = sizeof(struct task_dump)
 129 };
 130
 131 __attribute__((constructor)) static void reg_task_dump(void)
 132 {
 133         reg_task(&task_init_dump);
 134 }