src/plugin_nfacct.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4 #ifdef INTERNAL_PLUGIN_NFACCT
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <sys/types.h>
   9 #include <dirent.h>
  10 #include <sys/stat.h>
  11 #include <fcntl.h>
  12 #include <unistd.h>
  13 #include <time.h>
  14 #include <errno.h>
  15
  16 #include <libmnl/libmnl.h>
  17 #include <libnetfilter_acct/libnetfilter_acct.h>
  18
  19 #include "global_statistics.h"
  20 #include "common.h"
  21 #include "appconfig.h"
  22 #include "log.h"
  23 #include "rrd.h"
  24 #include "plugin_proc.h"
  25
  26 struct mynfacct {
  27         const char *name;
  28         uint64_t pkts;
  29         uint64_t bytes;
  30         struct nfacct *nfacct;
  31 };
  32
  33 struct nfacct_list {
  34         int size;
  35         int len;
  36         struct mynfacct data[];
  37 } *nfacct_list = NULL;
  38
  39 static int nfacct_callback(const struct nlmsghdr *nlh, void *data) {
  40         if(data) {};
  41
  42         if(!nfacct_list || nfacct_list->len == nfacct_list->size) {
  43                 int size = (nfacct_list) ? nfacct_list->size : 0;
  44                 int len = (nfacct_list) ? nfacct_list->len : 0;
  45                 size++;
  46
  47                 info("nfacct.plugin: increasing nfacct_list to size %d", size);
  48
  49                 nfacct_list = realloc(nfacct_list, sizeof(struct nfacct_list) + (sizeof(struct mynfacct) * size));
  50                 if(!nfacct_list) {
  51                         error("nfacct.plugin: cannot allocate nfacct_list.");
  52                         return MNL_CB_OK;
  53                 }
  54
  55                 nfacct_list->data[len].nfacct = nfacct_alloc();
  56                 if(!nfacct_list->data[size - 1].nfacct) {
  57                         error("nfacct.plugin: nfacct_alloc() failed.");
  58                         free(nfacct_list);
  59                         nfacct_list = NULL;
  60                         return MNL_CB_OK;
  61                 }
  62
  63                 nfacct_list->size = size;
  64                 nfacct_list->len = len;
  65         }
  66
  67         if(nfacct_nlmsg_parse_payload(nlh, nfacct_list->data[nfacct_list->len].nfacct) < 0) {
  68                 error("nfacct.plugin: nfacct_nlmsg_parse_payload() failed.");
  69                 return MNL_CB_OK;
  70         }
  71
  72         nfacct_list->data[nfacct_list->len].name  = nfacct_attr_get_str(nfacct_list->data[nfacct_list->len].nfacct, NFACCT_ATTR_NAME);
  73         nfacct_list->data[nfacct_list->len].pkts  = nfacct_attr_get_u64(nfacct_list->data[nfacct_list->len].nfacct, NFACCT_ATTR_PKTS);
  74         nfacct_list->data[nfacct_list->len].bytes = nfacct_attr_get_u64(nfacct_list->data[nfacct_list->len].nfacct, NFACCT_ATTR_BYTES);
  75
  76         nfacct_list->len++;
  77         return MNL_CB_OK;
  78 }
  79
  80 void *nfacct_main(void *ptr) {
  81         if(ptr) { ; }
  82
  83         info("NFACCT thread created with task id %d", gettid());
  84
  85         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
  86                 error("nfacct.plugin: Cannot set pthread cancel type to DEFERRED.");
  87
  88         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
  89                 error("nfacct.plugin: Cannot set pthread cancel state to ENABLE.");
  90
  91         char buf[MNL_SOCKET_BUFFER_SIZE];
  92         struct mnl_socket *nl = NULL;
  93         struct nlmsghdr *nlh = NULL;
  94         unsigned int seq = 0, portid = 0;
  95
  96         seq = time(NULL) - 1;
  97
  98         nl  = mnl_socket_open(NETLINK_NETFILTER);
  99         if(!nl) {
 100                 error("nfacct.plugin: mnl_socket_open() failed");
 101                 pthread_exit(NULL);
 102                 return NULL;
 103         }
 104
 105         if(mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
 106                 mnl_socket_close(nl);
 107                 error("nfacct.plugin: mnl_socket_bind() failed");
 108                 pthread_exit(NULL);
 109                 return NULL;
 110         }
 111         portid = mnl_socket_get_portid(nl);
 112
 113         // ------------------------------------------------------------------------
 114
 115         struct timeval last, now;
 116         unsigned long long usec = 0, susec = 0;
 117         RRDSET *st = NULL;
 118
 119         gettimeofday(&last, NULL);
 120
 121         // ------------------------------------------------------------------------
 122
 123         while(1) {
 124                 if(unlikely(netdata_exit)) break;
 125
 126                 seq++;
 127
 128                 nlh = nfacct_nlmsg_build_hdr(buf, NFNL_MSG_ACCT_GET, NLM_F_DUMP, seq);
 129                 if(!nlh) {
 130                         mnl_socket_close(nl);
 131                         error("nfacct.plugin: nfacct_nlmsg_build_hdr() failed");
 132                         pthread_exit(NULL);
 133                         return NULL;
 134                 }
 135
 136                 if(mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
 137                         error("nfacct.plugin: mnl_socket_send");
 138                         pthread_exit(NULL);
 139                         return NULL;
 140                 }
 141
 142                 if(nfacct_list) nfacct_list->len = 0;
 143
 144                 int ret;
 145                 while((ret = mnl_socket_recvfrom(nl, buf, sizeof(buf))) > 0) {
 146                         if((ret = mnl_cb_run(buf, ret, seq, portid, nfacct_callback, NULL)) <= 0) break;
 147                 }
 148
 149                 if (ret == -1) {
 150                         error("nfacct.plugin: error communicating with kernel.");
 151                         pthread_exit(NULL);
 152                         return NULL;
 153                 }
 154
 155                 // --------------------------------------------------------------------
 156
 157                 gettimeofday(&now, NULL);
 158                 usec = usecdiff(&now, &last) - susec;
 159                 debug(D_NFACCT_LOOP, "nfacct.plugin: last loop took %llu usec (worked for %llu, sleeped for %llu).", usec + susec, usec, susec);
 160
 161                 if(usec < (rrd_update_every * 1000000ULL / 2ULL)) susec = (rrd_update_every * 1000000ULL) - usec;
 162                 else susec = rrd_update_every * 1000000ULL / 2ULL;
 163
 164
 165                 // --------------------------------------------------------------------
 166
 167                 if(nfacct_list && nfacct_list->len) {
 168                         int i;
 169
 170                         st = rrdset_find_bytype("nfacct", "packets");
 171                         if(!st) {
 172                                 st = rrdset_create("nfacct", "packets", NULL, "netfilter", "Netfilter Accounting Packets", "packets/s", 1006, rrd_update_every, RRDSET_TYPE_STACKED);
 173
 174                                 for(i = 0; i < nfacct_list->len ; i++)
 175                                         rrddim_add(st, nfacct_list->data[i].name, NULL, 1, rrd_update_every, RRDDIM_INCREMENTAL);
 176                         }
 177                         else rrdset_next(st);
 178
 179                         for(i = 0; i < nfacct_list->len ; i++) {
 180                                 RRDDIM *rd = rrddim_find(st, nfacct_list->data[i].name);
 181
 182                                 if(!rd) rd = rrddim_add(st, nfacct_list->data[i].name, NULL, 1, rrd_update_every, RRDDIM_INCREMENTAL);
 183                                 if(rd) rrddim_set_by_pointer(st, rd, nfacct_list->data[i].pkts);
 184                         }
 185
 186                         rrdset_done(st);
 187
 188                         // ----------------------------------------------------------------
 189
 190                         st = rrdset_find_bytype("nfacct", "bytes");
 191                         if(!st) {
 192                                 st = rrdset_create("nfacct", "bytes", NULL, "netfilter", "Netfilter Accounting Bandwidth", "kilobytes/s", 1007, rrd_update_every, RRDSET_TYPE_STACKED);
 193
 194                                 for(i = 0; i < nfacct_list->len ; i++)
 195                                         rrddim_add(st, nfacct_list->data[i].name, NULL, 1, 1000 * rrd_update_every, RRDDIM_INCREMENTAL);
 196                         }
 197                         else rrdset_next(st);
 198
 199                         for(i = 0; i < nfacct_list->len ; i++) {
 200                                 RRDDIM *rd = rrddim_find(st, nfacct_list->data[i].name);
 201
 202                                 if(!rd) rd = rrddim_add(st, nfacct_list->data[i].name, NULL, 1, 1000 * rrd_update_every, RRDDIM_INCREMENTAL);
 203                                 if(rd) rrddim_set_by_pointer(st, rd, nfacct_list->data[i].bytes);
 204                         }
 205
 206                         rrdset_done(st);
 207                 }
 208
 209                 // --------------------------------------------------------------------
 210
 211                 usleep(susec);
 212
 213                 // copy current to last
 214                 bcopy(&now, &last, sizeof(struct timeval));
 215         }
 216
 217         mnl_socket_close(nl);
 218         pthread_exit(NULL);
 219         return NULL;
 220 }
 221 #endif