1 /**
2 * collectd - src/ceph.c
3 * Copyright (C) 2011 New Dream Network
4 * Copyright (C) 2015 Florian octo Forster
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Colin McCabe <cmccabe at alumni.cmu.edu>
21 * Dennis Zou <yunzou at cisco.com>
22 * Dan Ryder <daryder at cisco.com>
23 * Florian octo Forster <octo at collectd.org>
24 **/
26 #define _DEFAULT_SOURCE
27 #define _BSD_SOURCE
29 #include "collectd.h"
31 #include "common.h"
32 #include "plugin.h"
34 #include <arpa/inet.h>
35 #include <errno.h>
36 #include <fcntl.h>
37 #include <yajl/yajl_parse.h>
38 #if HAVE_YAJL_YAJL_VERSION_H
39 #include <yajl/yajl_version.h>
40 #endif
41 #ifdef HAVE_SYS_CAPABILITY_H
42 #include <sys/capability.h>
43 #endif
45 #include <inttypes.h>
46 #include <limits.h>
47 #include <math.h>
48 #include <poll.h>
49 #include <stdint.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <strings.h>
54 #include <sys/time.h>
55 #include <sys/types.h>
56 #include <sys/un.h>
57 #include <unistd.h>
59 #define RETRY_AVGCOUNT -1
61 #if defined(YAJL_MAJOR) && (YAJL_MAJOR > 1)
62 #define HAVE_YAJL_V2 1
63 #endif
65 #define RETRY_ON_EINTR(ret, expr) \
66 while (1) { \
67 ret = expr; \
68 if (ret >= 0) \
69 break; \
70 ret = -errno; \
71 if (ret != -EINTR) \
72 break; \
73 }
75 /** Timeout interval in seconds */
76 #define CEPH_TIMEOUT_INTERVAL 1
78 /** Maximum path length for a UNIX domain socket on this system */
79 #define UNIX_DOMAIN_SOCK_PATH_MAX (sizeof(((struct sockaddr_un *)0)->sun_path))
81 /** Yajl callback returns */
82 #define CEPH_CB_CONTINUE 1
83 #define CEPH_CB_ABORT 0
85 #if HAVE_YAJL_V2
86 typedef size_t yajl_len_t;
87 #else
88 typedef unsigned int yajl_len_t;
89 #endif
91 /** Number of types for ceph defined in types.db */
92 #define CEPH_DSET_TYPES_NUM 3
93 /** ceph types enum */
94 enum ceph_dset_type_d {
95 DSET_LATENCY = 0,
96 DSET_BYTES = 1,
97 DSET_RATE = 2,
98 DSET_TYPE_UNFOUND = 1000
99 };
101 /** Valid types for ceph defined in types.db */
102 static const char *const ceph_dset_types[CEPH_DSET_TYPES_NUM] = {
103 "ceph_latency", "ceph_bytes", "ceph_rate"};
105 /******* ceph_daemon *******/
106 struct ceph_daemon {
107 /** Version of the admin_socket interface */
108 uint32_t version;
109 /** daemon name **/
110 char name[DATA_MAX_NAME_LEN];
112 /** Path to the socket that we use to talk to the ceph daemon */
113 char asok_path[UNIX_DOMAIN_SOCK_PATH_MAX];
115 /** Number of counters */
116 int ds_num;
117 /** Track ds types */
118 uint32_t *ds_types;
119 /** Track ds names to match with types */
120 char **ds_names;
122 /**
123 * Keep track of last data for latency values so we can calculate rate
124 * since last poll.
125 */
126 struct last_data **last_poll_data;
127 /** index of last poll data */
128 int last_idx;
129 };
131 /******* JSON parsing *******/
132 typedef int (*node_handler_t)(void *, const char *, const char *);
134 /** Track state and handler while parsing JSON */
135 struct yajl_struct {
136 node_handler_t handler;
137 void *handler_arg;
139 char *key;
140 char *stack[YAJL_MAX_DEPTH];
141 size_t depth;
142 };
143 typedef struct yajl_struct yajl_struct;
145 enum perfcounter_type_d {
146 PERFCOUNTER_LATENCY = 0x4,
147 PERFCOUNTER_DERIVE = 0x8,
148 };
150 /** Give user option to use default (long run = since daemon started) avg */
151 static int long_run_latency_avg = 0;
153 /**
154 * Give user option to use default type for special cases -
155 * filestore.journal_wr_bytes is currently only metric here. Ceph reports the
156 * type as a sum/count pair and will calculate it the same as a latency value.
157 * All other "bytes" metrics (excluding the used/capacity bytes for the OSD)
158 * use the DERIVE type. Unless user specifies to use given type, convert this
159 * metric to use DERIVE.
160 */
161 static int convert_special_metrics = 1;
163 /** Array of daemons to monitor */
164 static struct ceph_daemon **g_daemons = NULL;
166 /** Number of elements in g_daemons */
167 static size_t g_num_daemons = 0;
169 /**
170 * A set of data that we build up in memory while parsing the JSON.
171 */
172 struct values_tmp {
173 /** ceph daemon we are processing data for*/
174 struct ceph_daemon *d;
175 /** track avgcount across counters for avgcount/sum latency pairs */
176 uint64_t avgcount;
177 /** current index of counters - used to get type of counter */
178 int index;
179 /**
180 * similar to index, but current index of latency type counters -
181 * used to get last poll data of counter
182 */
183 int latency_index;
184 /**
185 * values list - maintain across counters since
186 * host/plugin/plugin instance are always the same
187 */
188 value_list_t vlist;
189 };
191 /**
192 * A set of count/sum pairs to keep track of latency types and get difference
193 * between this poll data and last poll data.
194 */
195 struct last_data {
196 char ds_name[DATA_MAX_NAME_LEN];
197 double last_sum;
198 uint64_t last_count;
199 };
201 /******* network I/O *******/
202 enum cstate_t {
203 CSTATE_UNCONNECTED = 0,
204 CSTATE_WRITE_REQUEST,
205 CSTATE_READ_VERSION,
206 CSTATE_READ_AMT,
207 CSTATE_READ_JSON,
208 };
210 enum request_type_t {
211 ASOK_REQ_VERSION = 0,
212 ASOK_REQ_DATA = 1,
213 ASOK_REQ_SCHEMA = 2,
214 ASOK_REQ_NONE = 1000,
215 };
217 struct cconn {
218 /** The Ceph daemon that we're talking to */
219 struct ceph_daemon *d;
221 /** Request type */
222 uint32_t request_type;
224 /** The connection state */
225 enum cstate_t state;
227 /** The socket we use to talk to this daemon */
228 int asok;
230 /** The amount of data remaining to read / write. */
231 uint32_t amt;
233 /** Length of the JSON to read */
234 uint32_t json_len;
236 /** Buffer containing JSON data */
237 unsigned char *json;
239 /** Keep data important to yajl processing */
240 struct yajl_struct yajl;
241 };
243 static int ceph_cb_null(void *ctx) { return CEPH_CB_CONTINUE; }
245 static int ceph_cb_boolean(void *ctx, int bool_val) { return CEPH_CB_CONTINUE; }
247 #define BUFFER_ADD(dest, src) \
248 do { \
249 size_t dest_size = sizeof(dest); \
250 size_t dest_len = strlen(dest); \
251 if (dest_size > dest_len) { \
252 sstrncpy((dest) + dest_len, (src), dest_size - dest_len); \
253 } \
254 (dest)[dest_size - 1] = 0; \
255 } while (0)
257 static int ceph_cb_number(void *ctx, const char *number_val,
258 yajl_len_t number_len) {
259 yajl_struct *state = (yajl_struct *)ctx;
260 char buffer[number_len + 1];
261 char key[2 * DATA_MAX_NAME_LEN] = {0};
262 int status;
264 memcpy(buffer, number_val, number_len);
265 buffer[sizeof(buffer) - 1] = '\0';
267 for (size_t i = 0; i < state->depth; i++) {
268 if (state->stack[i] == NULL)
269 continue;
271 if (strlen(key) != 0)
272 BUFFER_ADD(key, ".");
273 BUFFER_ADD(key, state->stack[i]);
274 }
276 /* Super-special case for filestore.journal_wr_bytes.avgcount: For
277 * some reason, Ceph schema encodes this as a count/sum pair while all
278 * other "Bytes" data (excluding used/capacity bytes for OSD space) uses
279 * a single "Derive" type. To spare further confusion, keep this KPI as
280 * the same type of other "Bytes". Instead of keeping an "average" or
281 * "rate", use the "sum" in the pair and assign that to the derive
282 * value. */
283 if (convert_special_metrics && (state->depth >= 2) &&
284 (strcmp("filestore", state->stack[state->depth - 2]) == 0) &&
285 (strcmp("journal_wr_bytes", state->stack[state->depth - 1]) == 0) &&
286 (strcmp("avgcount", state->key) == 0)) {
287 DEBUG("ceph plugin: Skipping avgcount for filestore.JournalWrBytes");
288 return CEPH_CB_CONTINUE;
289 }
291 BUFFER_ADD(key, ".");
292 BUFFER_ADD(key, state->key);
294 status = state->handler(state->handler_arg, buffer, key);
296 if (status != 0) {
297 ERROR("ceph plugin: JSON handler failed with status %d.", status);
298 return CEPH_CB_ABORT;
299 }
301 return CEPH_CB_CONTINUE;
302 }
304 static int ceph_cb_string(void *ctx, const unsigned char *string_val,
305 yajl_len_t string_len) {
306 return CEPH_CB_CONTINUE;
307 }
309 static int ceph_cb_start_map(void *ctx) {
310 yajl_struct *state = (yajl_struct *)ctx;
312 /* Push key to the stack */
313 if (state->depth == YAJL_MAX_DEPTH)
314 return CEPH_CB_ABORT;
316 state->stack[state->depth] = state->key;
317 state->depth++;
318 state->key = NULL;
320 return CEPH_CB_CONTINUE;
321 }
323 static int ceph_cb_end_map(void *ctx) {
324 yajl_struct *state = (yajl_struct *)ctx;
326 /* Pop key from the stack */
327 if (state->depth == 0)
328 return CEPH_CB_ABORT;
330 sfree(state->key);
331 state->depth--;
332 state->key = state->stack[state->depth];
333 state->stack[state->depth] = NULL;
335 return CEPH_CB_CONTINUE;
336 }
338 static int ceph_cb_map_key(void *ctx, const unsigned char *key,
339 yajl_len_t string_len) {
340 yajl_struct *state = (yajl_struct *)ctx;
341 size_t sz = ((size_t)string_len) + 1;
343 sfree(state->key);
344 state->key = malloc(sz);
345 if (state->key == NULL) {
346 ERROR("ceph plugin: malloc failed.");
347 return CEPH_CB_ABORT;
348 }
350 memmove(state->key, key, sz - 1);
351 state->key[sz - 1] = 0;
353 return CEPH_CB_CONTINUE;
354 }
356 static int ceph_cb_start_array(void *ctx) { return CEPH_CB_CONTINUE; }
358 static int ceph_cb_end_array(void *ctx) { return CEPH_CB_CONTINUE; }
360 static yajl_callbacks callbacks = {ceph_cb_null,
361 ceph_cb_boolean,
362 NULL,
363 NULL,
364 ceph_cb_number,
365 ceph_cb_string,
366 ceph_cb_start_map,
367 ceph_cb_map_key,
368 ceph_cb_end_map,
369 ceph_cb_start_array,
370 ceph_cb_end_array};
372 static void ceph_daemon_print(const struct ceph_daemon *d) {
373 DEBUG("ceph plugin: name=%s, asok_path=%s", d->name, d->asok_path);
374 }
376 static void ceph_daemons_print(void) {
377 for (size_t i = 0; i < g_num_daemons; ++i) {
378 ceph_daemon_print(g_daemons[i]);
379 }
380 }
382 static void ceph_daemon_free(struct ceph_daemon *d) {
383 for (int i = 0; i < d->last_idx; i++) {
384 sfree(d->last_poll_data[i]);
385 }
386 sfree(d->last_poll_data);
387 d->last_poll_data = NULL;
388 d->last_idx = 0;
390 for (int i = 0; i < d->ds_num; i++) {
391 sfree(d->ds_names[i]);
392 }
393 sfree(d->ds_types);
394 sfree(d->ds_names);
395 sfree(d);
396 }
398 /* compact_ds_name removed the special characters ":", "_", "-" and "+" from the
399 * intput string. Characters following these special characters are capitalized.
400 * Trailing "+" and "-" characters are replaces with the strings "Plus" and
401 * "Minus". */
402 static int compact_ds_name(char *buffer, size_t buffer_size, char const *src) {
403 char *src_copy;
404 size_t src_len;
405 char *ptr = buffer;
406 size_t ptr_size = buffer_size;
407 _Bool append_plus = 0;
408 _Bool append_minus = 0;
410 if ((buffer == NULL) || (buffer_size <= strlen("Minus")) || (src == NULL))
411 return EINVAL;
413 src_copy = strdup(src);
414 src_len = strlen(src);
416 /* Remove trailing "+" and "-". */
417 if (src_copy[src_len - 1] == '+') {
418 append_plus = 1;
419 src_len--;
420 src_copy[src_len] = 0;
421 } else if (src_copy[src_len - 1] == '-') {
422 append_minus = 1;
423 src_len--;
424 src_copy[src_len] = 0;
425 }
427 /* Split at special chars, capitalize first character, append to buffer. */
428 char *dummy = src_copy;
429 char *token;
430 char *save_ptr = NULL;
431 while ((token = strtok_r(dummy, ":_-+", &save_ptr)) != NULL) {
432 size_t len;
434 dummy = NULL;
436 token[0] = toupper((int)token[0]);
438 assert(ptr_size > 1);
440 len = strlen(token);
441 if (len >= ptr_size)
442 len = ptr_size - 1;
444 assert(len > 0);
445 assert(len < ptr_size);
447 sstrncpy(ptr, token, len + 1);
448 ptr += len;
449 ptr_size -= len;
451 assert(*ptr == 0);
452 if (ptr_size <= 1)
453 break;
454 }
456 /* Append "Plus" or "Minus" if "+" or "-" has been stripped above. */
457 if (append_plus || append_minus) {
458 char const *append = "Plus";
459 if (append_minus)
460 append = "Minus";
462 size_t offset = buffer_size - (strlen(append) + 1);
463 if (offset > strlen(buffer))
464 offset = strlen(buffer);
466 sstrncpy(buffer + offset, append, buffer_size - offset);
467 }
469 sfree(src_copy);
470 return 0;
471 }
473 static _Bool has_suffix(char const *str, char const *suffix) {
474 size_t str_len = strlen(str);
475 size_t suffix_len = strlen(suffix);
476 size_t offset;
478 if (suffix_len > str_len)
479 return 0;
480 offset = str_len - suffix_len;
482 if (strcmp(str + offset, suffix) == 0)
483 return 1;
485 return 0;
486 }
488 static int cut_suffix(char new_str[], size_t new_str_len, char const *str, char const *suffix) {
490 size_t str_len = strlen (str);
491 size_t suffix_len = strlen (suffix);
493 size_t offset = str_len - suffix_len + 1;
495 if (offset > new_str_len) {
496 offset = new_str_len;
497 }
499 sstrncpy(new_str,str,offset);
501 return 0;
502 }
504 /* count_parts returns the number of elements a "foo.bar.baz" style key has. */
505 static size_t count_parts(char const *key) {
506 size_t parts_num = 0;
508 for (const char *ptr = key; ptr != NULL; ptr = strchr(ptr + 1, '.'))
509 parts_num++;
511 return parts_num;
512 }
514 /**
515 * Parse key to remove "type" if this is for schema and initiate compaction
516 */
517 static int parse_keys(char *buffer, size_t buffer_size, const char *key_str) {
518 char tmp[2 * buffer_size];
519 size_t tmp_size = sizeof(tmp);
521 if (buffer == NULL || buffer_size == 0 || key_str == NULL ||
522 strlen(key_str) == 0)
523 return EINVAL;
524 /* Strip suffix if it is ".type" or one of latency metric suffix. */
525 if (count_parts(key_str) > 2) {
526 if (has_suffix(key_str, ".type")) {
527 cut_suffix(tmp, tmp_size, key_str, ".type");
528 } else if (has_suffix(key_str, ".avgcount")) {
529 cut_suffix(tmp, tmp_size, key_str, ".avgcount");
530 } else if (has_suffix(key_str, ".sum")) {
531 cut_suffix(tmp, tmp_size, key_str, ".sum");
532 } else if (has_suffix(key_str, ".avgtime")) {
533 cut_suffix(tmp, tmp_size, key_str, ".avgtime");
534 }
535 } else {
536 sstrncpy(tmp, key_str, sizeof(tmp));
537 }
539 return compact_ds_name(buffer, buffer_size, tmp);
540 }
542 /**
543 * while parsing ceph admin socket schema, save counter name and type for later
544 * data processing
545 */
546 static int ceph_daemon_add_ds_entry(struct ceph_daemon *d, const char *name,
547 int pc_type) {
548 uint32_t type;
549 char ds_name[DATA_MAX_NAME_LEN];
551 if (convert_special_metrics) {
552 /**
553 * Special case for filestore:JournalWrBytes. For some reason, Ceph
554 * schema encodes this as a count/sum pair while all other "Bytes" data
555 * (excluding used/capacity bytes for OSD space) uses a single "Derive"
556 * type. To spare further confusion, keep this KPI as the same type of
557 * other "Bytes". Instead of keeping an "average" or "rate", use the
558 * "sum" in the pair and assign that to the derive value.
559 */
560 if ((strcmp(name, "filestore.journal_wr_bytes.type") == 0)) {
561 pc_type = 10;
562 }
563 }
565 d->ds_names = realloc(d->ds_names, sizeof(char *) * (d->ds_num + 1));
566 if (!d->ds_names) {
567 return -ENOMEM;
568 }
570 d->ds_types = realloc(d->ds_types, sizeof(uint32_t) * (d->ds_num + 1));
571 if (!d->ds_types) {
572 return -ENOMEM;
573 }
575 d->ds_names[d->ds_num] = malloc(DATA_MAX_NAME_LEN);
576 if (!d->ds_names[d->ds_num]) {
577 return -ENOMEM;
578 }
580 type = (pc_type & PERFCOUNTER_DERIVE)
581 ? DSET_RATE
582 : ((pc_type & PERFCOUNTER_LATENCY) ? DSET_LATENCY : DSET_BYTES);
583 d->ds_types[d->ds_num] = type;
585 if (parse_keys(ds_name, sizeof(ds_name), name)) {
586 return 1;
587 }
589 sstrncpy(d->ds_names[d->ds_num], ds_name, DATA_MAX_NAME_LEN - 1);
590 d->ds_num = (d->ds_num + 1);
592 return 0;
593 }
595 /******* ceph_config *******/
596 static int cc_handle_str(struct oconfig_item_s *item, char *dest,
597 int dest_len) {
598 const char *val;
599 if (item->values_num != 1) {
600 return -ENOTSUP;
601 }
602 if (item->values[0].type != OCONFIG_TYPE_STRING) {
603 return -ENOTSUP;
604 }
605 val = item->values[0].value.string;
606 if (snprintf(dest, dest_len, "%s", val) > (dest_len - 1)) {
607 ERROR("ceph plugin: configuration parameter '%s' is too long.\n",
608 item->key);
609 return -ENAMETOOLONG;
610 }
611 return 0;
612 }
614 static int cc_handle_bool(struct oconfig_item_s *item, int *dest) {
615 if (item->values_num != 1) {
616 return -ENOTSUP;
617 }
619 if (item->values[0].type != OCONFIG_TYPE_BOOLEAN) {
620 return -ENOTSUP;
621 }
623 *dest = (item->values[0].value.boolean) ? 1 : 0;
624 return 0;
625 }
627 static int cc_add_daemon_config(oconfig_item_t *ci) {
628 int ret;
629 struct ceph_daemon *nd, cd = {0};
630 struct ceph_daemon **tmp;
632 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
633 WARNING("ceph plugin: `Daemon' blocks need exactly one string "
634 "argument.");
635 return -1;
636 }
638 ret = cc_handle_str(ci, cd.name, DATA_MAX_NAME_LEN);
639 if (ret) {
640 return ret;
641 }
643 for (int i = 0; i < ci->children_num; i++) {
644 oconfig_item_t *child = ci->children + i;
646 if (strcasecmp("SocketPath", child->key) == 0) {
647 ret = cc_handle_str(child, cd.asok_path, sizeof(cd.asok_path));
648 if (ret) {
649 return ret;
650 }
651 } else {
652 WARNING("ceph plugin: ignoring unknown option %s", child->key);
653 }
654 }
655 if (cd.name[0] == '\0') {
656 ERROR("ceph plugin: you must configure a daemon name.\n");
657 return -EINVAL;
658 } else if (cd.asok_path[0] == '\0') {
659 ERROR("ceph plugin(name=%s): you must configure an administrative "
660 "socket path.\n",
661 cd.name);
662 return -EINVAL;
663 } else if (!((cd.asok_path[0] == '/') ||
664 (cd.asok_path[0] == '.' && cd.asok_path[1] == '/'))) {
665 ERROR("ceph plugin(name=%s): administrative socket paths must begin "
666 "with '/' or './' Can't parse: '%s'\n",
667 cd.name, cd.asok_path);
668 return -EINVAL;
669 }
671 tmp = realloc(g_daemons, (g_num_daemons + 1) * sizeof(*g_daemons));
672 if (tmp == NULL) {
673 /* The positive return value here indicates that this is a
674 * runtime error, not a configuration error. */
675 return ENOMEM;
676 }
677 g_daemons = tmp;
679 nd = malloc(sizeof(*nd));
680 if (!nd) {
681 return ENOMEM;
682 }
683 memcpy(nd, &cd, sizeof(*nd));
684 g_daemons[g_num_daemons] = nd;
685 g_num_daemons++;
686 return 0;
687 }
689 static int ceph_config(oconfig_item_t *ci) {
690 int ret;
692 for (int i = 0; i < ci->children_num; ++i) {
693 oconfig_item_t *child = ci->children + i;
694 if (strcasecmp("Daemon", child->key) == 0) {
695 ret = cc_add_daemon_config(child);
696 if (ret == ENOMEM) {
697 ERROR("ceph plugin: Couldn't allocate memory");
698 return ret;
699 } else if (ret) {
700 // process other daemons and ignore this one
701 continue;
702 }
703 } else if (strcasecmp("LongRunAvgLatency", child->key) == 0) {
704 ret = cc_handle_bool(child, &long_run_latency_avg);
705 if (ret) {
706 return ret;
707 }
708 } else if (strcasecmp("ConvertSpecialMetricTypes", child->key) == 0) {
709 ret = cc_handle_bool(child, &convert_special_metrics);
710 if (ret) {
711 return ret;
712 }
713 } else {
714 WARNING("ceph plugin: ignoring unknown option %s", child->key);
715 }
716 }
717 return 0;
718 }
720 /**
721 * Parse JSON and get error message if present
722 */
723 static int traverse_json(const unsigned char *json, uint32_t json_len,
724 yajl_handle hand) {
725 yajl_status status = yajl_parse(hand, json, json_len);
726 unsigned char *msg;
728 switch (status) {
729 case yajl_status_error:
730 msg = yajl_get_error(hand, /* verbose = */ 1,
731 /* jsonText = */ (unsigned char *)json,
732 (unsigned int)json_len);
733 ERROR("ceph plugin: yajl_parse failed: %s", msg);
734 yajl_free_error(hand, msg);
735 return 1;
736 case yajl_status_client_canceled:
737 return 1;
738 default:
739 return 0;
740 }
741 }
743 /**
744 * Add entry for each counter while parsing schema
745 */
746 static int node_handler_define_schema(void *arg, const char *val,
747 const char *key) {
748 struct ceph_daemon *d = (struct ceph_daemon *)arg;
749 int pc_type;
750 pc_type = atoi(val);
751 return ceph_daemon_add_ds_entry(d, key, pc_type);
752 }
754 /**
755 * Latency counter does not yet have an entry in last poll data - add it.
756 */
757 static int add_last(struct ceph_daemon *d, const char *ds_n, double cur_sum,
758 uint64_t cur_count) {
759 d->last_poll_data[d->last_idx] =
760 malloc(sizeof(*d->last_poll_data[d->last_idx]));
761 if (!d->last_poll_data[d->last_idx]) {
762 return -ENOMEM;
763 }
764 sstrncpy(d->last_poll_data[d->last_idx]->ds_name, ds_n,
765 sizeof(d->last_poll_data[d->last_idx]->ds_name));
766 d->last_poll_data[d->last_idx]->last_sum = cur_sum;
767 d->last_poll_data[d->last_idx]->last_count = cur_count;
768 d->last_idx = (d->last_idx + 1);
769 return 0;
770 }
772 /**
773 * Update latency counter or add new entry if it doesn't exist
774 */
775 static int update_last(struct ceph_daemon *d, const char *ds_n, int index,
776 double cur_sum, uint64_t cur_count) {
777 if ((d->last_idx > index) &&
778 (strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0)) {
779 d->last_poll_data[index]->last_sum = cur_sum;
780 d->last_poll_data[index]->last_count = cur_count;
781 return 0;
782 }
784 if (!d->last_poll_data) {
785 d->last_poll_data = malloc(sizeof(*d->last_poll_data));
786 if (!d->last_poll_data) {
787 return -ENOMEM;
788 }
789 } else {
790 struct last_data **tmp_last = realloc(
791 d->last_poll_data, ((d->last_idx + 1) * sizeof(struct last_data *)));
792 if (!tmp_last) {
793 return -ENOMEM;
794 }
795 d->last_poll_data = tmp_last;
796 }
797 return add_last(d, ds_n, cur_sum, cur_count);
798 }
800 /**
801 * If using index guess failed (shouldn't happen, but possible if counters
802 * get rearranged), resort to searching for counter name
803 */
804 static int backup_search_for_last_avg(struct ceph_daemon *d, const char *ds_n) {
805 for (int i = 0; i < d->last_idx; i++) {
806 if (strcmp(d->last_poll_data[i]->ds_name, ds_n) == 0) {
807 return i;
808 }
809 }
810 return -1;
811 }
813 /**
814 * Calculate average b/t current data and last poll data
815 * if last poll data exists
816 */
817 static double get_last_avg(struct ceph_daemon *d, const char *ds_n, int index,
818 double cur_sum, uint64_t cur_count) {
819 double result = -1.1, sum_delt = 0.0;
820 uint64_t count_delt = 0;
821 int tmp_index = 0;
822 if (d->last_idx > index) {
823 if (strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0) {
824 tmp_index = index;
825 }
826 // test previous index
827 else if ((index > 0) &&
828 (strcmp(d->last_poll_data[index - 1]->ds_name, ds_n) == 0)) {
829 tmp_index = (index - 1);
830 } else {
831 tmp_index = backup_search_for_last_avg(d, ds_n);
832 }
834 if ((tmp_index > -1) &&
835 (cur_count > d->last_poll_data[tmp_index]->last_count)) {
836 sum_delt = (cur_sum - d->last_poll_data[tmp_index]->last_sum);
837 count_delt = (cur_count - d->last_poll_data[tmp_index]->last_count);
838 result = (sum_delt / count_delt);
839 }
840 }
842 if (result == -1.1) {
843 result = NAN;
844 }
845 if (update_last(d, ds_n, tmp_index, cur_sum, cur_count) == -ENOMEM) {
846 return -ENOMEM;
847 }
848 return result;
849 }
851 /**
852 * If using index guess failed, resort to searching for counter name
853 */
854 static uint32_t backup_search_for_type(struct ceph_daemon *d, char *ds_name) {
855 for (int i = 0; i < d->ds_num; i++) {
856 if (strcmp(d->ds_names[i], ds_name) == 0) {
857 return d->ds_types[i];
858 }
859 }
860 return DSET_TYPE_UNFOUND;
861 }
863 /**
864 * Process counter data and dispatch values
865 */
866 static int node_handler_fetch_data(void *arg, const char *val,
867 const char *key) {
868 value_t uv;
869 double tmp_d;
870 uint64_t tmp_u;
871 struct values_tmp *vtmp = (struct values_tmp *)arg;
872 uint32_t type = DSET_TYPE_UNFOUND;
873 int index = vtmp->index;
875 char ds_name[DATA_MAX_NAME_LEN];
877 if (parse_keys(ds_name, sizeof(ds_name), key)) {
878 return 1;
879 }
881 if (index >= vtmp->d->ds_num) {
882 // don't overflow bounds of array
883 index = (vtmp->d->ds_num - 1);
884 }
886 /**
887 * counters should remain in same order we parsed schema... we maintain the
888 * index variable to keep track of current point in list of counters. first
889 * use index to guess point in array for retrieving type. if that doesn't
890 * work, use the old way to get the counter type
891 */
892 if (strcmp(ds_name, vtmp->d->ds_names[index]) == 0) {
893 // found match
894 type = vtmp->d->ds_types[index];
895 } else if ((index > 0) &&
896 (strcmp(ds_name, vtmp->d->ds_names[index - 1]) == 0)) {
897 // try previous key
898 type = vtmp->d->ds_types[index - 1];
899 }
901 if (type == DSET_TYPE_UNFOUND) {
902 // couldn't find right type by guessing, check the old way
903 type = backup_search_for_type(vtmp->d, ds_name);
904 }
906 switch (type) {
907 case DSET_LATENCY:
908 if (has_suffix(key, ".avgcount")) {
909 sscanf(val, "%" PRIu64, &vtmp->avgcount);
910 // return after saving avgcount - don't dispatch value
911 // until latency calculation
912 return 0;
913 } else if (has_suffix(key, ".sum")) {
914 if (vtmp->avgcount == 0) {
915 vtmp->avgcount = 1;
916 }
917 // user wants latency values as long run avg
918 // skip this step
919 if (long_run_latency_avg) {
920 return 0;
921 }
922 double sum, result;
923 sscanf(val, "%lf", &sum);
924 result = get_last_avg(vtmp->d, ds_name, vtmp->latency_index, sum,
925 vtmp->avgcount);
926 if (result == -ENOMEM) {
927 return -ENOMEM;
928 }
929 uv.gauge = result;
930 vtmp->latency_index = (vtmp->latency_index + 1);
931 } else if (has_suffix(key, ".avgtime")) {
932 // skip this step if no need in long run latency
933 if (!long_run_latency_avg) {
934 return 0;
935 }
936 double result;
937 sscanf(val, "%lf", &result);
938 uv.gauge = result;
939 vtmp->latency_index = (vtmp->latency_index + 1);
940 } else {
941 WARNING("ceph plugin: ignoring unknown latency metric: %s", key);
942 return 0;
943 }
944 break;
945 case DSET_BYTES:
946 sscanf(val, "%lf", &tmp_d);
947 uv.gauge = tmp_d;
948 break;
949 case DSET_RATE:
950 sscanf(val, "%" PRIu64, &tmp_u);
951 uv.derive = tmp_u;
952 break;
953 case DSET_TYPE_UNFOUND:
954 default:
955 ERROR("ceph plugin: ds %s was not properly initialized.", ds_name);
956 return -1;
957 }
959 sstrncpy(vtmp->vlist.type, ceph_dset_types[type], sizeof(vtmp->vlist.type));
960 sstrncpy(vtmp->vlist.type_instance, ds_name,
961 sizeof(vtmp->vlist.type_instance));
962 vtmp->vlist.values = &uv;
963 vtmp->vlist.values_len = 1;
965 vtmp->index = (vtmp->index + 1);
966 plugin_dispatch_values(&vtmp->vlist);
968 return 0;
969 }
971 static int cconn_connect(struct cconn *io) {
972 struct sockaddr_un address = {0};
973 int flags, fd, err;
974 if (io->state != CSTATE_UNCONNECTED) {
975 ERROR("ceph plugin: cconn_connect: io->state != CSTATE_UNCONNECTED");
976 return -EDOM;
977 }
978 fd = socket(PF_UNIX, SOCK_STREAM, 0);
979 if (fd < 0) {
980 err = -errno;
981 ERROR("ceph plugin: cconn_connect: socket(PF_UNIX, SOCK_STREAM, 0) "
982 "failed: error %d",
983 err);
984 return err;
985 }
986 address.sun_family = AF_UNIX;
987 snprintf(address.sun_path, sizeof(address.sun_path), "%s", io->d->asok_path);
988 RETRY_ON_EINTR(err, connect(fd, (struct sockaddr *)&address,
989 sizeof(struct sockaddr_un)));
990 if (err < 0) {
991 ERROR("ceph plugin: cconn_connect: connect(%d) failed: error %d", fd, err);
992 close(fd);
993 return err;
994 }
996 flags = fcntl(fd, F_GETFL, 0);
997 if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) != 0) {
998 err = -errno;
999 ERROR("ceph plugin: cconn_connect: fcntl(%d, O_NONBLOCK) error %d", fd,
1000 err);
1001 close(fd);
1002 return err;
1003 }
1004 io->asok = fd;
1005 io->state = CSTATE_WRITE_REQUEST;
1006 io->amt = 0;
1007 io->json_len = 0;
1008 io->json = NULL;
1009 return 0;
1010 }
1012 static void cconn_close(struct cconn *io) {
1013 io->state = CSTATE_UNCONNECTED;
1014 if (io->asok != -1) {
1015 int res;
1016 RETRY_ON_EINTR(res, close(io->asok));
1017 }
1018 io->asok = -1;
1019 io->amt = 0;
1020 io->json_len = 0;
1021 sfree(io->json);
1022 io->json = NULL;
1023 }
1025 /* Process incoming JSON counter data */
1026 static int cconn_process_data(struct cconn *io, yajl_struct *yajl,
1027 yajl_handle hand) {
1028 int ret;
1029 struct values_tmp *vtmp = calloc(1, sizeof(struct values_tmp) * 1);
1030 if (!vtmp) {
1031 return -ENOMEM;
1032 }
1034 vtmp->vlist = (value_list_t)VALUE_LIST_INIT;
1035 sstrncpy(vtmp->vlist.plugin, "ceph", sizeof(vtmp->vlist.plugin));
1036 sstrncpy(vtmp->vlist.plugin_instance, io->d->name,
1037 sizeof(vtmp->vlist.plugin_instance));
1039 vtmp->d = io->d;
1040 vtmp->latency_index = 0;
1041 vtmp->index = 0;
1042 yajl->handler_arg = vtmp;
1043 ret = traverse_json(io->json, io->json_len, hand);
1044 sfree(vtmp);
1045 return ret;
1046 }
1048 /**
1049 * Initiate JSON parsing and print error if one occurs
1050 */
1051 static int cconn_process_json(struct cconn *io) {
1052 if ((io->request_type != ASOK_REQ_DATA) &&
1053 (io->request_type != ASOK_REQ_SCHEMA)) {
1054 return -EDOM;
1055 }
1057 int result = 1;
1058 yajl_handle hand;
1059 yajl_status status;
1061 hand = yajl_alloc(&callbacks,
1062 #if HAVE_YAJL_V2
1063 /* alloc funcs = */ NULL,
1064 #else
1065 /* alloc funcs = */ NULL, NULL,
1066 #endif
1067 /* context = */ (void *)(&io->yajl));
1069 if (!hand) {
1070 ERROR("ceph plugin: yajl_alloc failed.");
1071 return ENOMEM;
1072 }
1074 io->yajl.depth = 0;
1076 switch (io->request_type) {
1077 case ASOK_REQ_DATA:
1078 io->yajl.handler = node_handler_fetch_data;
1079 result = cconn_process_data(io, &io->yajl, hand);
1080 break;
1081 case ASOK_REQ_SCHEMA:
1082 // init daemon specific variables
1083 io->d->ds_num = 0;
1084 io->d->last_idx = 0;
1085 io->d->last_poll_data = NULL;
1086 io->yajl.handler = node_handler_define_schema;
1087 io->yajl.handler_arg = io->d;
1088 result = traverse_json(io->json, io->json_len, hand);
1089 break;
1090 }
1092 if (result) {
1093 goto done;
1094 }
1096 #if HAVE_YAJL_V2
1097 status = yajl_complete_parse(hand);
1098 #else
1099 status = yajl_parse_complete(hand);
1100 #endif
1102 if (status != yajl_status_ok) {
1103 unsigned char *errmsg =
1104 yajl_get_error(hand, /* verbose = */ 0,
1105 /* jsonText = */ NULL, /* jsonTextLen = */ 0);
1106 ERROR("ceph plugin: yajl_parse_complete failed: %s", (char *)errmsg);
1107 yajl_free_error(hand, errmsg);
1108 yajl_free(hand);
1109 return 1;
1110 }
1112 done:
1113 yajl_free(hand);
1114 return result;
1115 }
1117 static int cconn_validate_revents(struct cconn *io, int revents) {
1118 if (revents & POLLERR) {
1119 ERROR("ceph plugin: cconn_validate_revents(name=%s): got POLLERR",
1120 io->d->name);
1121 return -EIO;
1122 }
1123 switch (io->state) {
1124 case CSTATE_WRITE_REQUEST:
1125 return (revents & POLLOUT) ? 0 : -EINVAL;
1126 case CSTATE_READ_VERSION:
1127 case CSTATE_READ_AMT:
1128 case CSTATE_READ_JSON:
1129 return (revents & POLLIN) ? 0 : -EINVAL;
1130 default:
1131 ERROR("ceph plugin: cconn_validate_revents(name=%s) got to "
1132 "illegal state on line %d",
1133 io->d->name, __LINE__);
1134 return -EDOM;
1135 }
1136 }
1138 /** Handle a network event for a connection */
1139 static int cconn_handle_event(struct cconn *io) {
1140 int ret;
1141 switch (io->state) {
1142 case CSTATE_UNCONNECTED:
1143 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1144 "state on line %d",
1145 io->d->name, __LINE__);
1147 return -EDOM;
1148 case CSTATE_WRITE_REQUEST: {
1149 char cmd[32];
1150 snprintf(cmd, sizeof(cmd), "%s%d%s", "{ \"prefix\": \"", io->request_type,
1151 "\" }\n");
1152 size_t cmd_len = strlen(cmd);
1153 RETRY_ON_EINTR(
1154 ret, write(io->asok, ((char *)&cmd) + io->amt, cmd_len - io->amt));
1155 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,amt=%d,ret=%d)",
1156 io->d->name, io->state, io->amt, ret);
1157 if (ret < 0) {
1158 return ret;
1159 }
1160 io->amt += ret;
1161 if (io->amt >= cmd_len) {
1162 io->amt = 0;
1163 switch (io->request_type) {
1164 case ASOK_REQ_VERSION:
1165 io->state = CSTATE_READ_VERSION;
1166 break;
1167 default:
1168 io->state = CSTATE_READ_AMT;
1169 break;
1170 }
1171 }
1172 return 0;
1173 }
1174 case CSTATE_READ_VERSION: {
1175 RETRY_ON_EINTR(ret, read(io->asok, ((char *)(&io->d->version)) + io->amt,
1176 sizeof(io->d->version) - io->amt));
1177 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1178 io->d->name, io->state, ret);
1179 if (ret < 0) {
1180 return ret;
1181 }
1182 io->amt += ret;
1183 if (io->amt >= sizeof(io->d->version)) {
1184 io->d->version = ntohl(io->d->version);
1185 if (io->d->version != 1) {
1186 ERROR("ceph plugin: cconn_handle_event(name=%s) not "
1187 "expecting version %d!",
1188 io->d->name, io->d->version);
1189 return -ENOTSUP;
1190 }
1191 DEBUG("ceph plugin: cconn_handle_event(name=%s): identified as "
1192 "version %d",
1193 io->d->name, io->d->version);
1194 io->amt = 0;
1195 cconn_close(io);
1196 io->request_type = ASOK_REQ_SCHEMA;
1197 }
1198 return 0;
1199 }
1200 case CSTATE_READ_AMT: {
1201 RETRY_ON_EINTR(ret, read(io->asok, ((char *)(&io->json_len)) + io->amt,
1202 sizeof(io->json_len) - io->amt));
1203 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1204 io->d->name, io->state, ret);
1205 if (ret < 0) {
1206 return ret;
1207 }
1208 io->amt += ret;
1209 if (io->amt >= sizeof(io->json_len)) {
1210 io->json_len = ntohl(io->json_len);
1211 io->amt = 0;
1212 io->state = CSTATE_READ_JSON;
1213 io->json = calloc(1, io->json_len + 1);
1214 if (!io->json) {
1215 ERROR("ceph plugin: error callocing io->json");
1216 return -ENOMEM;
1217 }
1218 }
1219 return 0;
1220 }
1221 case CSTATE_READ_JSON: {
1222 RETRY_ON_EINTR(ret,
1223 read(io->asok, io->json + io->amt, io->json_len - io->amt));
1224 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1225 io->d->name, io->state, ret);
1226 if (ret < 0) {
1227 return ret;
1228 }
1229 io->amt += ret;
1230 if (io->amt >= io->json_len) {
1231 ret = cconn_process_json(io);
1232 if (ret) {
1233 return ret;
1234 }
1235 cconn_close(io);
1236 io->request_type = ASOK_REQ_NONE;
1237 }
1238 return 0;
1239 }
1240 default:
1241 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1242 "state on line %d",
1243 io->d->name, __LINE__);
1244 return -EDOM;
1245 }
1246 }
1248 static int cconn_prepare(struct cconn *io, struct pollfd *fds) {
1249 int ret;
1250 if (io->request_type == ASOK_REQ_NONE) {
1251 /* The request has already been serviced. */
1252 return 0;
1253 } else if ((io->request_type == ASOK_REQ_DATA) && (io->d->ds_num == 0)) {
1254 /* If there are no counters to report on, don't bother
1255 * connecting */
1256 return 0;
1257 }
1259 switch (io->state) {
1260 case CSTATE_UNCONNECTED:
1261 ret = cconn_connect(io);
1262 if (ret > 0) {
1263 return -ret;
1264 } else if (ret < 0) {
1265 return ret;
1266 }
1267 fds->fd = io->asok;
1268 fds->events = POLLOUT;
1269 return 1;
1270 case CSTATE_WRITE_REQUEST:
1271 fds->fd = io->asok;
1272 fds->events = POLLOUT;
1273 return 1;
1274 case CSTATE_READ_VERSION:
1275 case CSTATE_READ_AMT:
1276 case CSTATE_READ_JSON:
1277 fds->fd = io->asok;
1278 fds->events = POLLIN;
1279 return 1;
1280 default:
1281 ERROR("ceph plugin: cconn_prepare(name=%s) got to illegal state "
1282 "on line %d",
1283 io->d->name, __LINE__);
1284 return -EDOM;
1285 }
1286 }
1288 /** Returns the difference between two struct timevals in milliseconds.
1289 * On overflow, we return max/min int.
1290 */
1291 static int milli_diff(const struct timeval *t1, const struct timeval *t2) {
1292 int64_t ret;
1293 int sec_diff = t1->tv_sec - t2->tv_sec;
1294 int usec_diff = t1->tv_usec - t2->tv_usec;
1295 ret = usec_diff / 1000;
1296 ret += (sec_diff * 1000);
1297 return (ret > INT_MAX) ? INT_MAX : ((ret < INT_MIN) ? INT_MIN : (int)ret);
1298 }
1300 /** This handles the actual network I/O to talk to the Ceph daemons.
1301 */
1302 static int cconn_main_loop(uint32_t request_type) {
1303 int ret, some_unreachable = 0;
1304 struct timeval end_tv;
1305 struct cconn io_array[g_num_daemons];
1307 DEBUG("ceph plugin: entering cconn_main_loop(request_type = %" PRIu32 ")",
1308 request_type);
1310 if (g_num_daemons < 1) {
1311 ERROR("ceph plugin: No daemons configured. See the \"Daemon\" config "
1312 "option.");
1313 return ENOENT;
1314 }
1316 /* create cconn array */
1317 for (size_t i = 0; i < g_num_daemons; i++) {
1318 io_array[i] = (struct cconn){
1319 .d = g_daemons[i],
1320 .request_type = request_type,
1321 .state = CSTATE_UNCONNECTED,
1322 };
1323 }
1325 /** Calculate the time at which we should give up */
1326 gettimeofday(&end_tv, NULL);
1327 end_tv.tv_sec += CEPH_TIMEOUT_INTERVAL;
1329 while (1) {
1330 int nfds, diff;
1331 struct timeval tv;
1332 struct cconn *polled_io_array[g_num_daemons];
1333 struct pollfd fds[g_num_daemons];
1334 memset(fds, 0, sizeof(fds));
1335 nfds = 0;
1336 for (size_t i = 0; i < g_num_daemons; ++i) {
1337 struct cconn *io = io_array + i;
1338 ret = cconn_prepare(io, fds + nfds);
1339 if (ret < 0) {
1340 WARNING("ceph plugin: cconn_prepare(name=%s,i=%zu,st=%d)=%d",
1341 io->d->name, i, io->state, ret);
1342 cconn_close(io);
1343 io->request_type = ASOK_REQ_NONE;
1344 some_unreachable = 1;
1345 } else if (ret == 1) {
1346 polled_io_array[nfds++] = io_array + i;
1347 }
1348 }
1349 if (nfds == 0) {
1350 /* finished */
1351 ret = 0;
1352 goto done;
1353 }
1354 gettimeofday(&tv, NULL);
1355 diff = milli_diff(&end_tv, &tv);
1356 if (diff <= 0) {
1357 /* Timed out */
1358 ret = -ETIMEDOUT;
1359 WARNING("ceph plugin: cconn_main_loop: timed out.");
1360 goto done;
1361 }
1362 RETRY_ON_EINTR(ret, poll(fds, nfds, diff));
1363 if (ret < 0) {
1364 ERROR("ceph plugin: poll(2) error: %d", ret);
1365 goto done;
1366 }
1367 for (int i = 0; i < nfds; ++i) {
1368 struct cconn *io = polled_io_array[i];
1369 int revents = fds[i].revents;
1370 if (revents == 0) {
1371 /* do nothing */
1372 continue;
1373 } else if (cconn_validate_revents(io, revents)) {
1374 WARNING("ceph plugin: cconn(name=%s,i=%d,st=%d): "
1375 "revents validation error: "
1376 "revents=0x%08x",
1377 io->d->name, i, io->state, revents);
1378 cconn_close(io);
1379 io->request_type = ASOK_REQ_NONE;
1380 some_unreachable = 1;
1381 } else {
1382 ret = cconn_handle_event(io);
1383 if (ret) {
1384 WARNING("ceph plugin: cconn_handle_event(name=%s,"
1385 "i=%d,st=%d): error %d",
1386 io->d->name, i, io->state, ret);
1387 cconn_close(io);
1388 io->request_type = ASOK_REQ_NONE;
1389 some_unreachable = 1;
1390 }
1391 }
1392 }
1393 }
1394 done:
1395 for (size_t i = 0; i < g_num_daemons; ++i) {
1396 cconn_close(io_array + i);
1397 }
1398 if (some_unreachable) {
1399 DEBUG("ceph plugin: cconn_main_loop: some Ceph daemons were unreachable.");
1400 } else {
1401 DEBUG("ceph plugin: cconn_main_loop: reached all Ceph daemons :)");
1402 }
1403 return ret;
1404 }
1406 static int ceph_read(void) { return cconn_main_loop(ASOK_REQ_DATA); }
1408 /******* lifecycle *******/
1409 static int ceph_init(void) {
1410 #if defined(HAVE_SYS_CAPABILITY_H) && defined(CAP_DAC_OVERRIDE)
1411 if (check_capability(CAP_DAC_OVERRIDE) != 0) {
1412 if (getuid() == 0)
1413 WARNING("ceph plugin: Running collectd as root, but the "
1414 "CAP_DAC_OVERRIDE capability is missing. The plugin's read "
1415 "function will probably fail. Is your init system dropping "
1416 "capabilities?");
1417 else
1418 WARNING(
1419 "ceph plugin: collectd doesn't have the CAP_DAC_OVERRIDE "
1420 "capability. If you don't want to run collectd as root, try running "
1421 "\"setcap cap_dac_override=ep\" on the collectd binary.");
1422 }
1423 #endif
1425 ceph_daemons_print();
1427 if (g_num_daemons < 1) {
1428 ERROR("ceph plugin: No daemons configured. See the \"Daemon\" config "
1429 "option.");
1430 return ENOENT;
1431 }
1433 return cconn_main_loop(ASOK_REQ_VERSION);
1434 }
1436 static int ceph_shutdown(void) {
1437 for (size_t i = 0; i < g_num_daemons; ++i) {
1438 ceph_daemon_free(g_daemons[i]);
1439 }
1440 sfree(g_daemons);
1441 g_daemons = NULL;
1442 g_num_daemons = 0;
1443 DEBUG("ceph plugin: finished ceph_shutdown");
1444 return 0;
1445 }
1447 void module_register(void) {
1448 plugin_register_complex_config("ceph", ceph_config);
1449 plugin_register_init("ceph", ceph_init);
1450 plugin_register_read("ceph", ceph_read);
1451 plugin_register_shutdown("ceph", ceph_shutdown);
1452 }