src/plugin_nfacct.c

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