Jacob Erlbeck | 95bf8280 | 2015-10-20 19:05:52 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * (C) 2015 by Sysmocom s.f.m.c. GmbH |
| 3 | * |
| 4 | * Author: Jacob Erlbeck <jerlbeck@sysmocom.de> |
| 5 | * |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <osmocom/core/stats.h> |
| 25 | |
| 26 | #include <unistd.h> |
| 27 | #include <string.h> |
| 28 | #include <stdint.h> |
| 29 | #include <errno.h> |
| 30 | #include <stdio.h> |
| 31 | #include <sys/socket.h> |
| 32 | #include <netinet/ip.h> |
| 33 | #include <arpa/inet.h> |
| 34 | |
| 35 | #include <osmocom/core/utils.h> |
| 36 | #include <osmocom/core/logging.h> |
| 37 | #include <osmocom/core/rate_ctr.h> |
| 38 | #include <osmocom/core/stat_item.h> |
| 39 | |
| 40 | /* TODO: register properly */ |
| 41 | #define DSTATS DLGLOBAL |
| 42 | |
| 43 | |
| 44 | static LLIST_HEAD(stats_reporter_list); |
| 45 | static void *stats_ctx = NULL; |
| 46 | |
| 47 | static int stats_reporter_statsd_open(struct stats_reporter *srep); |
| 48 | static int stats_reporter_statsd_close(struct stats_reporter *srep); |
| 49 | static int stats_reporter_send(struct stats_reporter *srep, const char *data, |
| 50 | int data_len); |
| 51 | |
| 52 | static int update_srep_config(struct stats_reporter *srep) |
| 53 | { |
| 54 | int rc = 0; |
| 55 | |
| 56 | if (srep->type != STATS_REPORTER_STATSD) { |
| 57 | srep->enabled = 0; |
| 58 | return -ENOTSUP; |
| 59 | } |
| 60 | |
| 61 | if (srep->running) { |
| 62 | rc = stats_reporter_statsd_close(srep); |
| 63 | srep->running = 0; |
| 64 | } |
| 65 | |
| 66 | if (!srep->enabled) |
| 67 | return rc; |
| 68 | |
| 69 | rc = stats_reporter_statsd_open(srep); |
| 70 | if (rc < 0) |
| 71 | srep->enabled = 0; |
| 72 | else |
| 73 | srep->running = 1; |
| 74 | |
| 75 | return rc; |
| 76 | } |
| 77 | |
| 78 | struct stats_reporter *stats_reporter_alloc(enum stats_reporter_type type, |
| 79 | const char *name) |
| 80 | { |
| 81 | struct stats_reporter *srep; |
| 82 | srep = talloc_zero(stats_ctx, struct stats_reporter); |
| 83 | OSMO_ASSERT(srep); |
| 84 | srep->type = type; |
| 85 | if (name) |
| 86 | srep->name = talloc_strdup(srep, name); |
| 87 | srep->fd = -1; |
| 88 | |
| 89 | llist_add(&srep->list, &stats_reporter_list); |
| 90 | |
| 91 | return srep; |
| 92 | } |
| 93 | |
| 94 | void stats_reporter_free(struct stats_reporter *srep) |
| 95 | { |
| 96 | stats_reporter_disable(srep); |
| 97 | llist_del(&srep->list); |
| 98 | talloc_free(srep); |
| 99 | } |
| 100 | |
| 101 | void stats_init(void *ctx) |
| 102 | { |
| 103 | stats_ctx = ctx; |
| 104 | } |
| 105 | |
| 106 | struct stats_reporter *stats_reporter_find(enum stats_reporter_type type, |
| 107 | const char *name) |
| 108 | { |
| 109 | struct stats_reporter *srep; |
| 110 | llist_for_each_entry(srep, &stats_reporter_list, list) { |
| 111 | if (srep->type != type) |
| 112 | continue; |
| 113 | if (srep->name != name) { |
| 114 | if (name == NULL || srep->name == NULL || |
| 115 | strcmp(name, srep->name) != 0) |
| 116 | continue; |
| 117 | } |
| 118 | return srep; |
| 119 | } |
| 120 | return NULL; |
| 121 | } |
| 122 | |
| 123 | int stats_reporter_set_remote_addr(struct stats_reporter *srep, const char *addr) |
| 124 | { |
| 125 | int rc; |
| 126 | struct sockaddr_in *sock_addr = (struct sockaddr_in *)&srep->dest_addr; |
| 127 | struct in_addr inaddr; |
| 128 | |
| 129 | OSMO_ASSERT(addr != NULL); |
| 130 | |
| 131 | rc = inet_pton(AF_INET, addr, &inaddr); |
| 132 | if (rc <= 0) |
| 133 | return -EINVAL; |
| 134 | |
| 135 | sock_addr->sin_addr = inaddr; |
| 136 | sock_addr->sin_family = AF_INET; |
| 137 | srep->dest_addr_len = sizeof(*sock_addr); |
| 138 | |
| 139 | talloc_free(srep->dest_addr_str); |
| 140 | srep->dest_addr_str = talloc_strdup(srep, addr); |
| 141 | |
| 142 | return update_srep_config(srep); |
| 143 | } |
| 144 | |
| 145 | int stats_reporter_set_remote_port(struct stats_reporter *srep, int port) |
| 146 | { |
| 147 | struct sockaddr_in *sock_addr = (struct sockaddr_in *)&srep->dest_addr; |
| 148 | |
| 149 | srep->dest_port = port; |
| 150 | sock_addr->sin_port = htons(port); |
| 151 | |
| 152 | return update_srep_config(srep); |
| 153 | } |
| 154 | |
| 155 | int stats_reporter_set_local_addr(struct stats_reporter *srep, const char *addr) |
| 156 | { |
| 157 | int rc; |
| 158 | struct sockaddr_in *sock_addr = (struct sockaddr_in *)&srep->bind_addr; |
| 159 | struct in_addr inaddr; |
| 160 | |
| 161 | if (addr) { |
| 162 | rc = inet_pton(AF_INET, addr, &inaddr); |
| 163 | if (rc <= 0) |
| 164 | return -EINVAL; |
| 165 | } else { |
| 166 | addr = INADDR_ANY; |
| 167 | } |
| 168 | |
| 169 | sock_addr->sin_addr = inaddr; |
| 170 | sock_addr->sin_family = AF_INET; |
| 171 | srep->bind_addr_len = addr ? sizeof(*sock_addr) : 0; |
| 172 | |
| 173 | talloc_free(srep->bind_addr_str); |
| 174 | srep->bind_addr_str = addr ? talloc_strdup(srep, addr) : NULL; |
| 175 | |
| 176 | return update_srep_config(srep); |
| 177 | } |
| 178 | |
| 179 | int stats_reporter_set_interval(struct stats_reporter *srep, int interval) |
| 180 | { |
| 181 | srep->interval = interval; |
| 182 | |
| 183 | return update_srep_config(srep); |
| 184 | } |
| 185 | |
| 186 | int stats_reporter_set_name_prefix(struct stats_reporter *srep, const char *prefix) |
| 187 | { |
| 188 | talloc_free(srep->name_prefix); |
| 189 | srep->name_prefix = prefix ? talloc_strdup(srep, prefix) : NULL; |
| 190 | |
| 191 | return update_srep_config(srep); |
| 192 | } |
| 193 | |
| 194 | int stats_reporter_enable(struct stats_reporter *srep) |
| 195 | { |
| 196 | srep->enabled = 1; |
| 197 | |
| 198 | return update_srep_config(srep); |
| 199 | } |
| 200 | |
| 201 | int stats_reporter_disable(struct stats_reporter *srep) |
| 202 | { |
| 203 | srep->enabled = 0; |
| 204 | |
| 205 | return update_srep_config(srep); |
| 206 | } |
| 207 | |
| 208 | static int stats_reporter_send(struct stats_reporter *srep, const char *data, |
| 209 | int data_len) |
| 210 | { |
| 211 | int rc; |
| 212 | |
| 213 | rc = sendto(srep->fd, data, data_len, MSG_NOSIGNAL | MSG_DONTWAIT, |
| 214 | &srep->dest_addr, srep->dest_addr_len); |
| 215 | |
| 216 | if (rc == -1) |
| 217 | rc = -errno; |
| 218 | |
| 219 | return rc; |
| 220 | } |
| 221 | |
| 222 | /*** statsd reporter ***/ |
| 223 | |
| 224 | struct stats_reporter *stats_reporter_create_statsd(const char *name) |
| 225 | { |
| 226 | struct stats_reporter *srep; |
| 227 | srep = stats_reporter_alloc(STATS_REPORTER_STATSD, name); |
| 228 | |
| 229 | return srep; |
| 230 | } |
| 231 | |
| 232 | static int stats_reporter_statsd_open(struct stats_reporter *srep) |
| 233 | { |
| 234 | int sock; |
| 235 | int rc; |
| 236 | |
| 237 | if (srep->fd != -1) |
| 238 | stats_reporter_statsd_close(srep); |
| 239 | |
| 240 | sock = socket(AF_INET, SOCK_DGRAM, 0); |
| 241 | if (sock == -1) |
| 242 | return -errno; |
| 243 | |
| 244 | if (srep->bind_addr_len > 0) { |
| 245 | rc = bind(sock, &srep->bind_addr, srep->bind_addr_len); |
| 246 | if (rc == -1) |
| 247 | goto failed; |
| 248 | } |
| 249 | |
| 250 | srep->fd = sock; |
| 251 | |
| 252 | return 0; |
| 253 | |
| 254 | failed: |
| 255 | rc = -errno; |
| 256 | close(sock); |
| 257 | |
| 258 | return rc; |
| 259 | } |
| 260 | |
| 261 | static int stats_reporter_statsd_close(struct stats_reporter *srep) |
| 262 | { |
| 263 | int rc; |
| 264 | if (srep->fd == -1) |
| 265 | return -EBADF; |
| 266 | |
| 267 | rc = close(srep->fd); |
| 268 | srep->fd = -1; |
| 269 | return rc == -1 ? -errno : 0; |
| 270 | } |
| 271 | |
| 272 | static int stats_reporter_statsd_send(struct stats_reporter *srep, |
| 273 | const char *name1, int index1, const char *name2, int value, |
| 274 | const char *unit) |
| 275 | { |
| 276 | char buf[256]; |
| 277 | int nchars, rc; |
| 278 | char *fmt = NULL; |
| 279 | |
| 280 | if (name1) { |
| 281 | if (index1 > 0) |
| 282 | fmt = "%1$s.%2$s.%3$d.%4$s:%5$d|%6$s"; |
| 283 | else |
| 284 | fmt = "%1$s.%2$s.%4$s:%5$d|%6$s"; |
| 285 | } else { |
| 286 | fmt = "%1$s.%4$s:%5$d|%6$s"; |
| 287 | } |
| 288 | if (!srep->name_prefix) |
| 289 | fmt += 5; /* skip prefix part */ |
| 290 | |
| 291 | nchars = snprintf(buf, sizeof(buf), fmt, |
| 292 | srep->name_prefix, name1, index1, name2, |
| 293 | value, unit); |
| 294 | |
| 295 | if (nchars >= sizeof(buf)) |
| 296 | /* Truncated */ |
| 297 | return -EMSGSIZE; |
| 298 | |
| 299 | rc = stats_reporter_send(srep, buf, nchars); |
| 300 | |
| 301 | return rc; |
| 302 | } |
| 303 | |
| 304 | static int stats_reporter_statsd_send_counter(struct stats_reporter *srep, |
| 305 | const struct rate_ctr_group *ctrg, |
| 306 | const struct rate_ctr_desc *desc, |
| 307 | int64_t value, int64_t delta) |
| 308 | { |
| 309 | if (ctrg) |
| 310 | return stats_reporter_statsd_send(srep, |
| 311 | ctrg->desc->group_name_prefix, |
| 312 | ctrg->idx, |
| 313 | desc->name, delta, "c"); |
| 314 | else |
| 315 | return stats_reporter_statsd_send(srep, |
| 316 | NULL, -1, |
| 317 | desc->name, delta, "c"); |
| 318 | } |
| 319 | |
| 320 | static int stats_reporter_statsd_send_item(struct stats_reporter *srep, |
| 321 | const struct stat_item_group *statg, |
| 322 | const struct stat_item_desc *desc, int value) |
| 323 | { |
| 324 | return stats_reporter_statsd_send(srep, |
| 325 | statg->desc->group_name_prefix, statg->idx, |
| 326 | desc->name, value, desc->unit); |
| 327 | } |
| 328 | |
| 329 | /*** generic rate counter support ***/ |
| 330 | |
| 331 | static int stats_reporter_send_counter(struct stats_reporter *srep, |
| 332 | const struct rate_ctr_group *ctrg, |
| 333 | const struct rate_ctr_desc *desc, |
| 334 | int64_t value, int64_t delta) |
| 335 | { |
| 336 | int rc; |
| 337 | |
| 338 | switch (srep->type) { |
| 339 | case STATS_REPORTER_STATSD: |
| 340 | rc = stats_reporter_statsd_send_counter(srep, ctrg, desc, |
| 341 | value, delta); |
| 342 | break; |
| 343 | } |
| 344 | |
| 345 | return rc; |
| 346 | } |
| 347 | |
| 348 | static int rate_ctr_handler( |
| 349 | struct rate_ctr_group *ctrg, struct rate_ctr *ctr, |
| 350 | const struct rate_ctr_desc *desc, void *sctx_) |
| 351 | { |
| 352 | struct stats_reporter *srep; |
| 353 | int rc; |
| 354 | int64_t delta = rate_ctr_difference(ctr); |
| 355 | |
| 356 | if (delta == 0) |
| 357 | return 0; |
| 358 | |
| 359 | llist_for_each_entry(srep, &stats_reporter_list, list) { |
| 360 | if (!srep->running) |
| 361 | continue; |
| 362 | |
| 363 | rc = stats_reporter_send_counter(srep, ctrg, desc, |
| 364 | ctr->current, delta); |
| 365 | |
| 366 | /* TODO: handle rc (log?, inc counter(!)?) or remove it */ |
| 367 | } |
| 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | static int rate_ctr_group_handler(struct rate_ctr_group *ctrg, void *sctx_) |
| 373 | { |
| 374 | rate_ctr_for_each_counter(ctrg, rate_ctr_handler, sctx_); |
| 375 | |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | |
| 380 | /*** main reporting function ***/ |
| 381 | |
| 382 | int stats_report() |
| 383 | { |
| 384 | rate_ctr_for_each_group(rate_ctr_group_handler, NULL); |
| 385 | |
| 386 | return 0; |
| 387 | } |