1 /**
2 * collectd - src/ceph.c
3 * Copyright (C) 2011 New Dream Network
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Colin McCabe <cmccabe@alumni.cmu.edu>
20 * Dennis Zou <yunzou@cisco.com>
21 * Dan Ryder <daryder@cisco.com>
22 **/
24 #define _DEFAULT_SOURCE
25 #define _BSD_SOURCE
27 #include "collectd.h"
28 #include "common.h"
29 #include "plugin.h"
31 #include <arpa/inet.h>
32 #include <errno.h>
33 #include <fcntl.h>
34 #include <yajl/yajl_parse.h>
35 #if HAVE_YAJL_YAJL_VERSION_H
36 #include <yajl/yajl_version.h>
37 #endif
39 #include <limits.h>
40 #include <poll.h>
41 #include <stdint.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <strings.h>
46 #include <sys/time.h>
47 #include <sys/types.h>
48 #include <sys/un.h>
49 #include <unistd.h>
50 #include <math.h>
51 #include <inttypes.h>
53 #define RETRY_AVGCOUNT -1
55 #if defined(YAJL_MAJOR) && (YAJL_MAJOR > 1)
56 # define HAVE_YAJL_V2 1
57 #endif
59 #define RETRY_ON_EINTR(ret, expr) \
60 while(1) { \
61 ret = expr; \
62 if(ret >= 0) \
63 break; \
64 ret = -errno; \
65 if(ret != -EINTR) \
66 break; \
67 }
69 /** Timeout interval in seconds */
70 #define CEPH_TIMEOUT_INTERVAL 1
72 /** Maximum path length for a UNIX domain socket on this system */
73 #define UNIX_DOMAIN_SOCK_PATH_MAX (sizeof(((struct sockaddr_un*)0)->sun_path))
75 /** Yajl callback returns */
76 #define CEPH_CB_CONTINUE 1
77 #define CEPH_CB_ABORT 0
79 #if HAVE_YAJL_V2
80 typedef size_t yajl_len_t;
81 #else
82 typedef unsigned int yajl_len_t;
83 #endif
85 /** Number of types for ceph defined in types.db */
86 #define CEPH_DSET_TYPES_NUM 3
87 /** ceph types enum */
88 enum ceph_dset_type_d
89 {
90 DSET_LATENCY = 0,
91 DSET_BYTES = 1,
92 DSET_RATE = 2,
93 DSET_TYPE_UNFOUND = 1000
94 };
96 /** Valid types for ceph defined in types.db */
97 const char * ceph_dset_types [CEPH_DSET_TYPES_NUM] =
98 {"ceph_latency", "ceph_bytes", "ceph_rate"};
100 /******* ceph_daemon *******/
101 struct ceph_daemon
102 {
103 /** Version of the admin_socket interface */
104 uint32_t version;
105 /** daemon name **/
106 char name[DATA_MAX_NAME_LEN];
108 /** Path to the socket that we use to talk to the ceph daemon */
109 char asok_path[UNIX_DOMAIN_SOCK_PATH_MAX];
111 /** Number of counters */
112 int ds_num;
113 /** Track ds types */
114 uint32_t *ds_types;
115 /** Track ds names to match with types */
116 char **ds_names;
118 /**
119 * Keep track of last data for latency values so we can calculate rate
120 * since last poll.
121 */
122 struct last_data **last_poll_data;
123 /** index of last poll data */
124 int last_idx;
125 };
127 /******* JSON parsing *******/
128 typedef int (*node_handler_t)(void *, const char*, const char*);
130 /** Track state and handler while parsing JSON */
131 struct yajl_struct
132 {
133 node_handler_t handler;
134 void * handler_arg;
135 struct {
136 char key[DATA_MAX_NAME_LEN];
137 int key_len;
138 } state[YAJL_MAX_DEPTH];
139 int depth;
140 };
141 typedef struct yajl_struct yajl_struct;
143 enum perfcounter_type_d
144 {
145 PERFCOUNTER_LATENCY = 0x4, PERFCOUNTER_DERIVE = 0x8,
146 };
148 /** Give user option to use default (long run = since daemon started) avg */
149 static int long_run_latency_avg = 0;
151 /**
152 * Give user option to use default type for special cases -
153 * filestore.journal_wr_bytes is currently only metric here. Ceph reports the
154 * type as a sum/count pair and will calculate it the same as a latency value.
155 * All other "bytes" metrics (excluding the used/capacity bytes for the OSD)
156 * use the DERIVE type. Unless user specifies to use given type, convert this
157 * metric to use DERIVE.
158 */
159 static int convert_special_metrics = 1;
161 /** Array of daemons to monitor */
162 static struct ceph_daemon **g_daemons = NULL;
164 /** Number of elements in g_daemons */
165 static int g_num_daemons = 0;
167 /**
168 * A set of data that we build up in memory while parsing the JSON.
169 */
170 struct values_tmp
171 {
172 /** ceph daemon we are processing data for*/
173 struct ceph_daemon *d;
174 /** track avgcount across counters for avgcount/sum latency pairs */
175 uint64_t avgcount;
176 /** current index of counters - used to get type of counter */
177 int index;
178 /** do we already have an avgcount for latency pair */
179 int avgcount_exists;
180 /**
181 * similar to index, but current index of latency type counters -
182 * used to get last poll data of counter
183 */
184 int latency_index;
185 /**
186 * values list - maintain across counters since
187 * host/plugin/plugin instance are always the same
188 */
189 value_list_t vlist;
190 };
192 /**
193 * A set of count/sum pairs to keep track of latency types and get difference
194 * between this poll data and last poll data.
195 */
196 struct last_data
197 {
198 char ds_name[DATA_MAX_NAME_LEN];
199 double last_sum;
200 uint64_t last_count;
201 };
203 /******* network I/O *******/
204 enum cstate_t
205 {
206 CSTATE_UNCONNECTED = 0,
207 CSTATE_WRITE_REQUEST,
208 CSTATE_READ_VERSION,
209 CSTATE_READ_AMT,
210 CSTATE_READ_JSON,
211 };
213 enum request_type_t
214 {
215 ASOK_REQ_VERSION = 0,
216 ASOK_REQ_DATA = 1,
217 ASOK_REQ_SCHEMA = 2,
218 ASOK_REQ_NONE = 1000,
219 };
221 struct cconn
222 {
223 /** The Ceph daemon that we're talking to */
224 struct ceph_daemon *d;
226 /** Request type */
227 uint32_t request_type;
229 /** The connection state */
230 enum cstate_t state;
232 /** The socket we use to talk to this daemon */
233 int asok;
235 /** The amount of data remaining to read / write. */
236 uint32_t amt;
238 /** Length of the JSON to read */
239 uint32_t json_len;
241 /** Buffer containing JSON data */
242 unsigned char *json;
244 /** Keep data important to yajl processing */
245 struct yajl_struct yajl;
246 };
248 static int ceph_cb_null(void *ctx)
249 {
250 return CEPH_CB_CONTINUE;
251 }
253 static int ceph_cb_boolean(void *ctx, int bool_val)
254 {
255 return CEPH_CB_CONTINUE;
256 }
258 static int
259 ceph_cb_number(void *ctx, const char *number_val, yajl_len_t number_len)
260 {
261 yajl_struct *yajl = (yajl_struct*)ctx;
262 char buffer[number_len+1];
263 int i, latency_type = 0, result;
264 char key[128];
266 memcpy(buffer, number_val, number_len);
267 buffer[sizeof(buffer) - 1] = 0;
269 ssnprintf(key, yajl->state[0].key_len, "%s", yajl->state[0].key);
270 for(i = 1; i < yajl->depth; i++)
271 {
272 if((i == yajl->depth-1) && ((strcmp(yajl->state[i].key,"avgcount") == 0)
273 || (strcmp(yajl->state[i].key,"sum") == 0)))
274 {
275 if(convert_special_metrics)
276 {
277 /**
278 * Special case for filestore:JournalWrBytes. For some reason,
279 * Ceph schema encodes this as a count/sum pair while all
280 * other "Bytes" data (excluding used/capacity bytes for OSD
281 * space) uses a single "Derive" type. To spare further
282 * confusion, keep this KPI as the same type of other "Bytes".
283 * Instead of keeping an "average" or "rate", use the "sum" in
284 * the pair and assign that to the derive value.
285 */
286 if((strcmp(yajl->state[i-1].key, "journal_wr_bytes") == 0) &&
287 (strcmp(yajl->state[i-2].key,"filestore") == 0) &&
288 (strcmp(yajl->state[i].key,"avgcount") == 0))
289 {
290 DEBUG("ceph plugin: Skipping avgcount for filestore.JournalWrBytes");
291 yajl->depth = (yajl->depth - 1);
292 return CEPH_CB_CONTINUE;
293 }
294 }
295 //probably a avgcount/sum pair. if not - we'll try full key later
296 latency_type = 1;
297 break;
298 }
299 strncat(key, ".", 1);
300 strncat(key, yajl->state[i].key, yajl->state[i].key_len+1);
301 }
303 result = yajl->handler(yajl->handler_arg, buffer, key);
305 if((result == RETRY_AVGCOUNT) && latency_type)
306 {
307 strncat(key, ".", 1);
308 strncat(key, yajl->state[yajl->depth-1].key,
309 yajl->state[yajl->depth-1].key_len+1);
310 result = yajl->handler(yajl->handler_arg, buffer, key);
311 }
313 if(result == -ENOMEM)
314 {
315 ERROR("ceph plugin: memory allocation failed");
316 return CEPH_CB_ABORT;
317 }
319 yajl->depth = (yajl->depth - 1);
320 return CEPH_CB_CONTINUE;
321 }
323 static int ceph_cb_string(void *ctx, const unsigned char *string_val,
324 yajl_len_t string_len)
325 {
326 return CEPH_CB_CONTINUE;
327 }
329 static int ceph_cb_start_map(void *ctx)
330 {
331 return CEPH_CB_CONTINUE;
332 }
334 static int
335 ceph_cb_map_key(void *ctx, const unsigned char *key, yajl_len_t string_len)
336 {
337 yajl_struct *yajl = (yajl_struct*)ctx;
339 if((yajl->depth+1) >= YAJL_MAX_DEPTH)
340 {
341 ERROR("ceph plugin: depth exceeds max, aborting.");
342 return CEPH_CB_ABORT;
343 }
345 char buffer[string_len+1];
347 memcpy(buffer, key, string_len);
348 buffer[sizeof(buffer) - 1] = 0;
350 snprintf(yajl->state[yajl->depth].key, sizeof(buffer), "%s", buffer);
351 yajl->state[yajl->depth].key_len = sizeof(buffer);
352 yajl->depth = (yajl->depth + 1);
354 return CEPH_CB_CONTINUE;
355 }
357 static int ceph_cb_end_map(void *ctx)
358 {
359 yajl_struct *yajl = (yajl_struct*)ctx;
361 yajl->depth = (yajl->depth - 1);
362 return CEPH_CB_CONTINUE;
363 }
365 static int ceph_cb_start_array(void *ctx)
366 {
367 return CEPH_CB_CONTINUE;
368 }
370 static int ceph_cb_end_array(void *ctx)
371 {
372 return CEPH_CB_CONTINUE;
373 }
375 static yajl_callbacks callbacks = {
376 ceph_cb_null,
377 ceph_cb_boolean,
378 NULL,
379 NULL,
380 ceph_cb_number,
381 ceph_cb_string,
382 ceph_cb_start_map,
383 ceph_cb_map_key,
384 ceph_cb_end_map,
385 ceph_cb_start_array,
386 ceph_cb_end_array
387 };
389 static void ceph_daemon_print(const struct ceph_daemon *d)
390 {
391 DEBUG("ceph plugin: name=%s, asok_path=%s", d->name, d->asok_path);
392 }
394 static void ceph_daemons_print(void)
395 {
396 int i;
397 for(i = 0; i < g_num_daemons; ++i)
398 {
399 ceph_daemon_print(g_daemons[i]);
400 }
401 }
403 static void ceph_daemon_free(struct ceph_daemon *d)
404 {
405 int i = 0;
406 for(; i < d->last_idx; i++)
407 {
408 sfree(d->last_poll_data[i]);
409 }
410 sfree(d->last_poll_data);
411 d->last_poll_data = NULL;
412 d->last_idx = 0;
413 for(i = 0; i < d->ds_num; i++)
414 {
415 sfree(d->ds_names[i]);
416 }
417 sfree(d->ds_types);
418 sfree(d->ds_names);
419 sfree(d);
420 }
422 /**
423 * Compact ds name by removing special characters and trimming length to
424 * DATA_MAX_NAME_LEN if necessary
425 */
426 static void compact_ds_name(char *source, char *dest)
427 {
428 int keys_num = 0, i;
429 char *save_ptr = NULL, *tmp_ptr = source;
430 char *keys[16];
431 char len_str[3];
432 char tmp[DATA_MAX_NAME_LEN];
433 size_t key_chars_remaining = (DATA_MAX_NAME_LEN-1);
434 int reserved = 0;
435 int offset = 0;
436 memset(tmp, 0, sizeof(tmp));
437 if(source == NULL || dest == NULL || source[0] == '\0' || dest[0] != '\0')
438 {
439 return;
440 }
441 size_t src_len = strlen(source);
442 snprintf(len_str, sizeof(len_str), "%zu", src_len);
443 unsigned char append_status = 0x0;
444 append_status |= (source[src_len - 1] == '-') ? 0x1 : 0x0;
445 append_status |= (source[src_len - 1] == '+') ? 0x2 : 0x0;
446 while ((keys[keys_num] = strtok_r(tmp_ptr, ":_-+", &save_ptr)) != NULL)
447 {
448 tmp_ptr = NULL;
449 /** capitalize 1st char **/
450 keys[keys_num][0] = toupper(keys[keys_num][0]);
451 keys_num++;
452 if(keys_num >= 16)
453 {
454 break;
455 }
456 }
457 /** concatenate each part of source string **/
458 for(i = 0; i < keys_num; i++)
459 {
460 strncat(tmp, keys[i], key_chars_remaining);
461 key_chars_remaining -= strlen(keys[i]);
462 }
463 tmp[DATA_MAX_NAME_LEN - 1] = '\0';
464 /** to coordinate limitation of length of type_instance
465 * we will truncate ds_name
466 * when the its length is more than
467 * DATA_MAX_NAME_LEN
468 */
469 if(strlen(tmp) > DATA_MAX_NAME_LEN - 1)
470 {
471 append_status |= 0x4;
472 /** we should reserve space for
473 * len_str
474 */
475 reserved += 2;
476 }
477 if(append_status & 0x1)
478 {
479 /** we should reserve space for
480 * "Minus"
481 */
482 reserved += 5;
483 }
484 if(append_status & 0x2)
485 {
486 /** we should reserve space for
487 * "Plus"
488 */
489 reserved += 4;
490 }
491 snprintf(dest, DATA_MAX_NAME_LEN - reserved, "%s", tmp);
492 offset = strlen(dest);
493 switch (append_status)
494 {
495 case 0x1:
496 memcpy(dest + offset, "Minus", 5);
497 break;
498 case 0x2:
499 memcpy(dest + offset, "Plus", 5);
500 break;
501 case 0x4:
502 memcpy(dest + offset, len_str, 2);
503 break;
504 case 0x5:
505 memcpy(dest + offset, "Minus", 5);
506 memcpy(dest + offset + 5, len_str, 2);
507 break;
508 case 0x6:
509 memcpy(dest + offset, "Plus", 4);
510 memcpy(dest + offset + 4, len_str, 2);
511 break;
512 default:
513 break;
514 }
515 }
517 /**
518 * Parse key to remove "type" if this is for schema and initiate compaction
519 */
520 static int parse_keys(const char *key_str, char *ds_name)
521 {
522 char *ptr, *rptr;
523 size_t ds_name_len = 0;
524 /**
525 * allow up to 100 characters before compaction - compact_ds_name will not
526 * allow more than DATA_MAX_NAME_LEN chars
527 */
528 int max_str_len = 100;
529 char tmp_ds_name[max_str_len];
530 memset(tmp_ds_name, 0, sizeof(tmp_ds_name));
531 if(ds_name == NULL || key_str == NULL || key_str[0] == '\0' ||
532 ds_name[0] != '\0')
533 {
534 return -1;
535 }
536 if((ptr = strchr(key_str, '.')) == NULL
537 || (rptr = strrchr(key_str, '.')) == NULL)
538 {
539 memcpy(tmp_ds_name, key_str, max_str_len - 1);
540 goto compact;
541 }
543 ds_name_len = (rptr - ptr) > max_str_len ? max_str_len : (rptr - ptr);
544 if((ds_name_len == 0) || strncmp(rptr + 1, "type", 4))
545 { /** copy whole key **/
546 memcpy(tmp_ds_name, key_str, max_str_len - 1);
547 }
548 else
549 {/** more than two keys **/
550 memcpy(tmp_ds_name, key_str, ((rptr - key_str) > (max_str_len - 1) ?
551 (max_str_len - 1) : (rptr - key_str)));
552 }
554 compact: compact_ds_name(tmp_ds_name, ds_name);
555 return 0;
556 }
558 /**
559 * while parsing ceph admin socket schema, save counter name and type for later
560 * data processing
561 */
562 static int ceph_daemon_add_ds_entry(struct ceph_daemon *d, const char *name,
563 int pc_type)
564 {
565 uint32_t type;
566 char ds_name[DATA_MAX_NAME_LEN];
567 memset(ds_name, 0, sizeof(ds_name));
569 if(convert_special_metrics)
570 {
571 /**
572 * Special case for filestore:JournalWrBytes. For some reason, Ceph
573 * schema encodes this as a count/sum pair while all other "Bytes" data
574 * (excluding used/capacity bytes for OSD space) uses a single "Derive"
575 * type. To spare further confusion, keep this KPI as the same type of
576 * other "Bytes". Instead of keeping an "average" or "rate", use the
577 * "sum" in the pair and assign that to the derive value.
578 */
579 if((strcmp(name,"filestore.journal_wr_bytes.type") == 0))
580 {
581 pc_type = 10;
582 }
583 }
585 d->ds_names = realloc(d->ds_names, sizeof(char *) * (d->ds_num + 1));
586 if(!d->ds_names)
587 {
588 return -ENOMEM;
589 }
591 d->ds_types = realloc(d->ds_types, sizeof(uint32_t) * (d->ds_num + 1));
592 if(!d->ds_types)
593 {
594 return -ENOMEM;
595 }
597 d->ds_names[d->ds_num] = malloc(sizeof(char) * DATA_MAX_NAME_LEN);
598 if(!d->ds_names[d->ds_num])
599 {
600 return -ENOMEM;
601 }
603 type = (pc_type & PERFCOUNTER_DERIVE) ? DSET_RATE :
604 ((pc_type & PERFCOUNTER_LATENCY) ? DSET_LATENCY : DSET_BYTES);
605 d->ds_types[d->ds_num] = type;
607 if(parse_keys(name, ds_name))
608 {
609 return 1;
610 }
612 sstrncpy(d->ds_names[d->ds_num], ds_name, DATA_MAX_NAME_LEN -1);
613 d->ds_num = (d->ds_num + 1);
615 return 0;
616 }
618 /******* ceph_config *******/
619 static int cc_handle_str(struct oconfig_item_s *item, char *dest, int dest_len)
620 {
621 const char *val;
622 if(item->values_num != 1)
623 {
624 return -ENOTSUP;
625 }
626 if(item->values[0].type != OCONFIG_TYPE_STRING)
627 {
628 return -ENOTSUP;
629 }
630 val = item->values[0].value.string;
631 if(snprintf(dest, dest_len, "%s", val) > (dest_len - 1))
632 {
633 ERROR("ceph plugin: configuration parameter '%s' is too long.\n",
634 item->key);
635 return -ENAMETOOLONG;
636 }
637 return 0;
638 }
640 static int cc_handle_bool(struct oconfig_item_s *item, int *dest)
641 {
642 if(item->values_num != 1)
643 {
644 return -ENOTSUP;
645 }
647 if(item->values[0].type != OCONFIG_TYPE_BOOLEAN)
648 {
649 return -ENOTSUP;
650 }
652 *dest = (item->values[0].value.boolean) ? 1 : 0;
653 return 0;
654 }
656 static int cc_add_daemon_config(oconfig_item_t *ci)
657 {
658 int ret, i;
659 struct ceph_daemon *nd, cd;
660 struct ceph_daemon **tmp;
661 memset(&cd, 0, sizeof(struct ceph_daemon));
663 if((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
664 {
665 WARNING("ceph plugin: `Daemon' blocks need exactly one string "
666 "argument.");
667 return (-1);
668 }
670 ret = cc_handle_str(ci, cd.name, DATA_MAX_NAME_LEN);
671 if(ret)
672 {
673 return ret;
674 }
676 for(i=0; i < ci->children_num; i++)
677 {
678 oconfig_item_t *child = ci->children + i;
680 if(strcasecmp("SocketPath", child->key) == 0)
681 {
682 ret = cc_handle_str(child, cd.asok_path, sizeof(cd.asok_path));
683 if(ret)
684 {
685 return ret;
686 }
687 }
688 else
689 {
690 WARNING("ceph plugin: ignoring unknown option %s", child->key);
691 }
692 }
693 if(cd.name[0] == '\0')
694 {
695 ERROR("ceph plugin: you must configure a daemon name.\n");
696 return -EINVAL;
697 }
698 else if(cd.asok_path[0] == '\0')
699 {
700 ERROR("ceph plugin(name=%s): you must configure an administrative "
701 "socket path.\n", cd.name);
702 return -EINVAL;
703 }
704 else if(!((cd.asok_path[0] == '/') ||
705 (cd.asok_path[0] == '.' && cd.asok_path[1] == '/')))
706 {
707 ERROR("ceph plugin(name=%s): administrative socket paths must begin "
708 "with '/' or './' Can't parse: '%s'\n", cd.name, cd.asok_path);
709 return -EINVAL;
710 }
712 tmp = realloc(g_daemons, (g_num_daemons+1) * sizeof(*g_daemons));
713 if(tmp == NULL)
714 {
715 /* The positive return value here indicates that this is a
716 * runtime error, not a configuration error. */
717 return ENOMEM;
718 }
719 g_daemons = tmp;
721 nd = malloc(sizeof(*nd));
722 if(!nd)
723 {
724 return ENOMEM;
725 }
726 memcpy(nd, &cd, sizeof(*nd));
727 g_daemons[g_num_daemons++] = nd;
728 return 0;
729 }
731 static int ceph_config(oconfig_item_t *ci)
732 {
733 int ret, i;
735 for(i = 0; i < ci->children_num; ++i)
736 {
737 oconfig_item_t *child = ci->children + i;
738 if(strcasecmp("Daemon", child->key) == 0)
739 {
740 ret = cc_add_daemon_config(child);
741 if(ret == ENOMEM)
742 {
743 ERROR("ceph plugin: Couldn't allocate memory");
744 return ret;
745 }
746 else if(ret)
747 {
748 //process other daemons and ignore this one
749 continue;
750 }
751 }
752 else if(strcasecmp("LongRunAvgLatency", child->key) == 0)
753 {
754 ret = cc_handle_bool(child, &long_run_latency_avg);
755 if(ret)
756 {
757 return ret;
758 }
759 }
760 else if(strcasecmp("ConvertSpecialMetricTypes", child->key) == 0)
761 {
762 ret = cc_handle_bool(child, &convert_special_metrics);
763 if(ret)
764 {
765 return ret;
766 }
767 }
768 else
769 {
770 WARNING("ceph plugin: ignoring unknown option %s", child->key);
771 }
772 }
773 return 0;
774 }
776 /**
777 * Parse JSON and get error message if present
778 */
779 static int
780 traverse_json(const unsigned char *json, uint32_t json_len, yajl_handle hand)
781 {
782 yajl_status status = yajl_parse(hand, json, json_len);
783 unsigned char *msg;
785 switch(status)
786 {
787 case yajl_status_error:
788 msg = yajl_get_error(hand, /* verbose = */ 1,
789 /* jsonText = */ (unsigned char *) json,
790 (unsigned int) json_len);
791 ERROR ("ceph plugin: yajl_parse failed: %s", msg);
792 yajl_free_error(hand, msg);
793 return 1;
794 case yajl_status_client_canceled:
795 return 1;
796 default:
797 return 0;
798 }
799 }
801 /**
802 * Add entry for each counter while parsing schema
803 */
804 static int
805 node_handler_define_schema(void *arg, const char *val, const char *key)
806 {
807 struct ceph_daemon *d = (struct ceph_daemon *) arg;
808 int pc_type;
809 pc_type = atoi(val);
810 return ceph_daemon_add_ds_entry(d, key, pc_type);
811 }
813 /**
814 * Latency counter does not yet have an entry in last poll data - add it.
815 */
816 static int add_last(struct ceph_daemon *d, const char *ds_n, double cur_sum,
817 uint64_t cur_count)
818 {
819 d->last_poll_data[d->last_idx] = malloc(1 * sizeof(struct last_data));
820 if(!d->last_poll_data[d->last_idx])
821 {
822 return -ENOMEM;
823 }
824 sstrncpy(d->last_poll_data[d->last_idx]->ds_name,ds_n,
825 sizeof(d->last_poll_data[d->last_idx]->ds_name));
826 d->last_poll_data[d->last_idx]->last_sum = cur_sum;
827 d->last_poll_data[d->last_idx]->last_count = cur_count;
828 d->last_idx = (d->last_idx + 1);
829 return 0;
830 }
832 /**
833 * Update latency counter or add new entry if it doesn't exist
834 */
835 static int update_last(struct ceph_daemon *d, const char *ds_n, int index,
836 double cur_sum, uint64_t cur_count)
837 {
838 if((d->last_idx > index) && (strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0))
839 {
840 d->last_poll_data[index]->last_sum = cur_sum;
841 d->last_poll_data[index]->last_count = cur_count;
842 return 0;
843 }
845 if(!d->last_poll_data)
846 {
847 d->last_poll_data = malloc(1 * sizeof(struct last_data *));
848 if(!d->last_poll_data)
849 {
850 return -ENOMEM;
851 }
852 }
853 else
854 {
855 struct last_data **tmp_last = realloc(d->last_poll_data,
856 ((d->last_idx+1) * sizeof(struct last_data *)));
857 if(!tmp_last)
858 {
859 return -ENOMEM;
860 }
861 d->last_poll_data = tmp_last;
862 }
863 return add_last(d, ds_n, cur_sum, cur_count);
864 }
866 /**
867 * If using index guess failed (shouldn't happen, but possible if counters
868 * get rearranged), resort to searching for counter name
869 */
870 static int backup_search_for_last_avg(struct ceph_daemon *d, const char *ds_n)
871 {
872 int i = 0;
873 for(; i < d->last_idx; i++)
874 {
875 if(strcmp(d->last_poll_data[i]->ds_name, ds_n) == 0)
876 {
877 return i;
878 }
879 }
880 return -1;
881 }
883 /**
884 * Calculate average b/t current data and last poll data
885 * if last poll data exists
886 */
887 static double get_last_avg(struct ceph_daemon *d, const char *ds_n, int index,
888 double cur_sum, uint64_t cur_count)
889 {
890 double result = -1.1, sum_delt = 0.0;
891 uint64_t count_delt = 0;
892 int tmp_index = 0;
893 if(d->last_idx > index)
894 {
895 if(strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0)
896 {
897 tmp_index = index;
898 }
899 //test previous index
900 else if((index > 0) && (strcmp(d->last_poll_data[index-1]->ds_name, ds_n) == 0))
901 {
902 tmp_index = (index - 1);
903 }
904 else
905 {
906 tmp_index = backup_search_for_last_avg(d, ds_n);
907 }
909 if((tmp_index > -1) && (cur_count > d->last_poll_data[tmp_index]->last_count))
910 {
911 sum_delt = (cur_sum - d->last_poll_data[tmp_index]->last_sum);
912 count_delt = (cur_count - d->last_poll_data[tmp_index]->last_count);
913 result = (sum_delt / count_delt);
914 }
915 }
917 if(result == -1.1)
918 {
919 result = NAN;
920 }
921 if(update_last(d, ds_n, tmp_index, cur_sum, cur_count) == -ENOMEM)
922 {
923 return -ENOMEM;
924 }
925 return result;
926 }
928 /**
929 * If using index guess failed, resort to searching for counter name
930 */
931 static uint32_t backup_search_for_type(struct ceph_daemon *d, char *ds_name)
932 {
933 int idx = 0;
934 for(; idx < d->ds_num; idx++)
935 {
936 if(strcmp(d->ds_names[idx], ds_name) == 0)
937 {
938 return d->ds_types[idx];
939 }
940 }
941 return DSET_TYPE_UNFOUND;
942 }
944 /**
945 * Process counter data and dispatch values
946 */
947 static int node_handler_fetch_data(void *arg, const char *val, const char *key)
948 {
949 value_t uv;
950 double tmp_d;
951 uint64_t tmp_u;
952 struct values_tmp *vtmp = (struct values_tmp*) arg;
953 uint32_t type = DSET_TYPE_UNFOUND;
954 int index = vtmp->index;
956 char ds_name[DATA_MAX_NAME_LEN];
957 memset(ds_name, 0, sizeof(ds_name));
959 if(parse_keys(key, ds_name))
960 {
961 return 1;
962 }
964 if(index >= vtmp->d->ds_num)
965 {
966 //don't overflow bounds of array
967 index = (vtmp->d->ds_num - 1);
968 }
970 /**
971 * counters should remain in same order we parsed schema... we maintain the
972 * index variable to keep track of current point in list of counters. first
973 * use index to guess point in array for retrieving type. if that doesn't
974 * work, use the old way to get the counter type
975 */
976 if(strcmp(ds_name, vtmp->d->ds_names[index]) == 0)
977 {
978 //found match
979 type = vtmp->d->ds_types[index];
980 }
981 else if((index > 0) && (strcmp(ds_name, vtmp->d->ds_names[index-1]) == 0))
982 {
983 //try previous key
984 type = vtmp->d->ds_types[index-1];
985 }
987 if(type == DSET_TYPE_UNFOUND)
988 {
989 //couldn't find right type by guessing, check the old way
990 type = backup_search_for_type(vtmp->d, ds_name);
991 }
993 switch(type)
994 {
995 case DSET_LATENCY:
996 if(vtmp->avgcount_exists == -1)
997 {
998 sscanf(val, "%" PRIu64, &vtmp->avgcount);
999 vtmp->avgcount_exists = 0;
1000 //return after saving avgcount - don't dispatch value
1001 //until latency calculation
1002 return 0;
1003 }
1004 else
1005 {
1006 double sum, result;
1007 sscanf(val, "%lf", &sum);
1009 if(vtmp->avgcount == 0)
1010 {
1011 vtmp->avgcount = 1;
1012 }
1014 /** User wants latency values as long run avg */
1015 if(long_run_latency_avg)
1016 {
1017 result = (sum / vtmp->avgcount);
1018 }
1019 else
1020 {
1021 result = get_last_avg(vtmp->d, ds_name, vtmp->latency_index, sum, vtmp->avgcount);
1022 if(result == -ENOMEM)
1023 {
1024 return -ENOMEM;
1025 }
1026 }
1028 uv.gauge = result;
1029 vtmp->avgcount_exists = -1;
1030 vtmp->latency_index = (vtmp->latency_index + 1);
1031 }
1032 break;
1033 case DSET_BYTES:
1034 sscanf(val, "%lf", &tmp_d);
1035 uv.gauge = tmp_d;
1036 break;
1037 case DSET_RATE:
1038 sscanf(val, "%" PRIu64, &tmp_u);
1039 uv.derive = tmp_u;
1040 break;
1041 case DSET_TYPE_UNFOUND:
1042 default:
1043 ERROR("ceph plugin: ds %s was not properly initialized.", ds_name);
1044 return -1;
1045 }
1047 sstrncpy(vtmp->vlist.type, ceph_dset_types[type], sizeof(vtmp->vlist.type));
1048 sstrncpy(vtmp->vlist.type_instance, ds_name, sizeof(vtmp->vlist.type_instance));
1049 vtmp->vlist.values = &uv;
1050 vtmp->vlist.values_len = 1;
1052 vtmp->index = (vtmp->index + 1);
1053 plugin_dispatch_values(&vtmp->vlist);
1055 return 0;
1056 }
1058 static int cconn_connect(struct cconn *io)
1059 {
1060 struct sockaddr_un address;
1061 int flags, fd, err;
1062 if(io->state != CSTATE_UNCONNECTED)
1063 {
1064 ERROR("ceph plugin: cconn_connect: io->state != CSTATE_UNCONNECTED");
1065 return -EDOM;
1066 }
1067 fd = socket(PF_UNIX, SOCK_STREAM, 0);
1068 if(fd < 0)
1069 {
1070 int err = -errno;
1071 ERROR("ceph plugin: cconn_connect: socket(PF_UNIX, SOCK_STREAM, 0) "
1072 "failed: error %d", err);
1073 return err;
1074 }
1075 memset(&address, 0, sizeof(struct sockaddr_un));
1076 address.sun_family = AF_UNIX;
1077 snprintf(address.sun_path, sizeof(address.sun_path), "%s",
1078 io->d->asok_path);
1079 RETRY_ON_EINTR(err,
1080 connect(fd, (struct sockaddr *) &address, sizeof(struct sockaddr_un)));
1081 if(err < 0)
1082 {
1083 ERROR("ceph plugin: cconn_connect: connect(%d) failed: error %d",
1084 fd, err);
1085 return err;
1086 }
1088 flags = fcntl(fd, F_GETFL, 0);
1089 if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) != 0)
1090 {
1091 err = -errno;
1092 ERROR("ceph plugin: cconn_connect: fcntl(%d, O_NONBLOCK) error %d",
1093 fd, err);
1094 return err;
1095 }
1096 io->asok = fd;
1097 io->state = CSTATE_WRITE_REQUEST;
1098 io->amt = 0;
1099 io->json_len = 0;
1100 io->json = NULL;
1101 return 0;
1102 }
1104 static void cconn_close(struct cconn *io)
1105 {
1106 io->state = CSTATE_UNCONNECTED;
1107 if(io->asok != -1)
1108 {
1109 int res;
1110 RETRY_ON_EINTR(res, close(io->asok));
1111 }
1112 io->asok = -1;
1113 io->amt = 0;
1114 io->json_len = 0;
1115 sfree(io->json);
1116 io->json = NULL;
1117 }
1119 /* Process incoming JSON counter data */
1120 static int
1121 cconn_process_data(struct cconn *io, yajl_struct *yajl, yajl_handle hand)
1122 {
1123 int ret;
1124 struct values_tmp *vtmp = calloc(1, sizeof(struct values_tmp) * 1);
1125 if(!vtmp)
1126 {
1127 return -ENOMEM;
1128 }
1130 vtmp->vlist = (value_list_t)VALUE_LIST_INIT;
1131 sstrncpy(vtmp->vlist.host, hostname_g, sizeof(vtmp->vlist.host));
1132 sstrncpy(vtmp->vlist.plugin, "ceph", sizeof(vtmp->vlist.plugin));
1133 sstrncpy(vtmp->vlist.plugin_instance, io->d->name, sizeof(vtmp->vlist.plugin_instance));
1135 vtmp->d = io->d;
1136 vtmp->avgcount_exists = -1;
1137 vtmp->latency_index = 0;
1138 vtmp->index = 0;
1139 yajl->handler_arg = vtmp;
1140 ret = traverse_json(io->json, io->json_len, hand);
1141 sfree(vtmp);
1142 return ret;
1143 }
1145 /**
1146 * Initiate JSON parsing and print error if one occurs
1147 */
1148 static int cconn_process_json(struct cconn *io)
1149 {
1150 if((io->request_type != ASOK_REQ_DATA) &&
1151 (io->request_type != ASOK_REQ_SCHEMA))
1152 {
1153 return -EDOM;
1154 }
1156 int result = 1;
1157 yajl_handle hand;
1158 yajl_status status;
1160 hand = yajl_alloc(&callbacks,
1161 #if HAVE_YAJL_V2
1162 /* alloc funcs = */ NULL,
1163 #else
1164 /* alloc funcs = */ NULL, NULL,
1165 #endif
1166 /* context = */ (void *)(&io->yajl));
1168 if(!hand)
1169 {
1170 ERROR ("ceph plugin: yajl_alloc failed.");
1171 return ENOMEM;
1172 }
1174 io->yajl.depth = 0;
1176 switch(io->request_type)
1177 {
1178 case ASOK_REQ_DATA:
1179 io->yajl.handler = node_handler_fetch_data;
1180 result = cconn_process_data(io, &io->yajl, hand);
1181 break;
1182 case ASOK_REQ_SCHEMA:
1183 //init daemon specific variables
1184 io->d->ds_num = 0;
1185 io->d->last_idx = 0;
1186 io->d->last_poll_data = NULL;
1187 io->yajl.handler = node_handler_define_schema;
1188 io->yajl.handler_arg = io->d;
1189 result = traverse_json(io->json, io->json_len, hand);
1190 break;
1191 }
1193 if(result)
1194 {
1195 goto done;
1196 }
1198 #if HAVE_YAJL_V2
1199 status = yajl_complete_parse(hand);
1200 #else
1201 status = yajl_parse_complete(hand);
1202 #endif
1204 if (status != yajl_status_ok)
1205 {
1206 unsigned char *errmsg = yajl_get_error (hand, /* verbose = */ 0,
1207 /* jsonText = */ NULL, /* jsonTextLen = */ 0);
1208 ERROR ("ceph plugin: yajl_parse_complete failed: %s",
1209 (char *) errmsg);
1210 yajl_free_error (hand, errmsg);
1211 yajl_free (hand);
1212 return 1;
1213 }
1215 done:
1216 yajl_free (hand);
1217 return result;
1218 }
1220 static int cconn_validate_revents(struct cconn *io, int revents)
1221 {
1222 if(revents & POLLERR)
1223 {
1224 ERROR("ceph plugin: cconn_validate_revents(name=%s): got POLLERR",
1225 io->d->name);
1226 return -EIO;
1227 }
1228 switch (io->state)
1229 {
1230 case CSTATE_WRITE_REQUEST:
1231 return (revents & POLLOUT) ? 0 : -EINVAL;
1232 case CSTATE_READ_VERSION:
1233 case CSTATE_READ_AMT:
1234 case CSTATE_READ_JSON:
1235 return (revents & POLLIN) ? 0 : -EINVAL;
1236 default:
1237 ERROR("ceph plugin: cconn_validate_revents(name=%s) got to "
1238 "illegal state on line %d", io->d->name, __LINE__);
1239 return -EDOM;
1240 }
1241 }
1243 /** Handle a network event for a connection */
1244 static int cconn_handle_event(struct cconn *io)
1245 {
1246 int ret;
1247 switch (io->state)
1248 {
1249 case CSTATE_UNCONNECTED:
1250 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1251 "state on line %d", io->d->name, __LINE__);
1253 return -EDOM;
1254 case CSTATE_WRITE_REQUEST:
1255 {
1256 char cmd[32];
1257 snprintf(cmd, sizeof(cmd), "%s%d%s", "{ \"prefix\": \"",
1258 io->request_type, "\" }\n");
1259 size_t cmd_len = strlen(cmd);
1260 RETRY_ON_EINTR(ret,
1261 write(io->asok, ((char*)&cmd) + io->amt, cmd_len - io->amt));
1262 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,amt=%d,ret=%d)",
1263 io->d->name, io->state, io->amt, ret);
1264 if(ret < 0)
1265 {
1266 return ret;
1267 }
1268 io->amt += ret;
1269 if(io->amt >= cmd_len)
1270 {
1271 io->amt = 0;
1272 switch (io->request_type)
1273 {
1274 case ASOK_REQ_VERSION:
1275 io->state = CSTATE_READ_VERSION;
1276 break;
1277 default:
1278 io->state = CSTATE_READ_AMT;
1279 break;
1280 }
1281 }
1282 return 0;
1283 }
1284 case CSTATE_READ_VERSION:
1285 {
1286 RETRY_ON_EINTR(ret,
1287 read(io->asok, ((char*)(&io->d->version)) + io->amt,
1288 sizeof(io->d->version) - io->amt));
1289 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1290 io->d->name, io->state, ret);
1291 if(ret < 0)
1292 {
1293 return ret;
1294 }
1295 io->amt += ret;
1296 if(io->amt >= sizeof(io->d->version))
1297 {
1298 io->d->version = ntohl(io->d->version);
1299 if(io->d->version != 1)
1300 {
1301 ERROR("ceph plugin: cconn_handle_event(name=%s) not "
1302 "expecting version %d!", io->d->name, io->d->version);
1303 return -ENOTSUP;
1304 }
1305 DEBUG("ceph plugin: cconn_handle_event(name=%s): identified as "
1306 "version %d", io->d->name, io->d->version);
1307 io->amt = 0;
1308 cconn_close(io);
1309 io->request_type = ASOK_REQ_SCHEMA;
1310 }
1311 return 0;
1312 }
1313 case CSTATE_READ_AMT:
1314 {
1315 RETRY_ON_EINTR(ret,
1316 read(io->asok, ((char*)(&io->json_len)) + io->amt,
1317 sizeof(io->json_len) - io->amt));
1318 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1319 io->d->name, io->state, ret);
1320 if(ret < 0)
1321 {
1322 return ret;
1323 }
1324 io->amt += ret;
1325 if(io->amt >= sizeof(io->json_len))
1326 {
1327 io->json_len = ntohl(io->json_len);
1328 io->amt = 0;
1329 io->state = CSTATE_READ_JSON;
1330 io->json = calloc(1, io->json_len + 1);
1331 if(!io->json)
1332 {
1333 ERROR("ceph plugin: error callocing io->json");
1334 return -ENOMEM;
1335 }
1336 }
1337 return 0;
1338 }
1339 case CSTATE_READ_JSON:
1340 {
1341 RETRY_ON_EINTR(ret,
1342 read(io->asok, io->json + io->amt, io->json_len - io->amt));
1343 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1344 io->d->name, io->state, ret);
1345 if(ret < 0)
1346 {
1347 return ret;
1348 }
1349 io->amt += ret;
1350 if(io->amt >= io->json_len)
1351 {
1352 ret = cconn_process_json(io);
1353 if(ret)
1354 {
1355 return ret;
1356 }
1357 cconn_close(io);
1358 io->request_type = ASOK_REQ_NONE;
1359 }
1360 return 0;
1361 }
1362 default:
1363 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1364 "state on line %d", io->d->name, __LINE__);
1365 return -EDOM;
1366 }
1367 }
1369 static int cconn_prepare(struct cconn *io, struct pollfd* fds)
1370 {
1371 int ret;
1372 if(io->request_type == ASOK_REQ_NONE)
1373 {
1374 /* The request has already been serviced. */
1375 return 0;
1376 }
1377 else if((io->request_type == ASOK_REQ_DATA) && (io->d->ds_num == 0))
1378 {
1379 /* If there are no counters to report on, don't bother
1380 * connecting */
1381 return 0;
1382 }
1384 switch (io->state)
1385 {
1386 case CSTATE_UNCONNECTED:
1387 ret = cconn_connect(io);
1388 if(ret > 0)
1389 {
1390 return -ret;
1391 }
1392 else if(ret < 0)
1393 {
1394 return ret;
1395 }
1396 fds->fd = io->asok;
1397 fds->events = POLLOUT;
1398 return 1;
1399 case CSTATE_WRITE_REQUEST:
1400 fds->fd = io->asok;
1401 fds->events = POLLOUT;
1402 return 1;
1403 case CSTATE_READ_VERSION:
1404 case CSTATE_READ_AMT:
1405 case CSTATE_READ_JSON:
1406 fds->fd = io->asok;
1407 fds->events = POLLIN;
1408 return 1;
1409 default:
1410 ERROR("ceph plugin: cconn_prepare(name=%s) got to illegal state "
1411 "on line %d", io->d->name, __LINE__);
1412 return -EDOM;
1413 }
1414 }
1416 /** Returns the difference between two struct timevals in milliseconds.
1417 * On overflow, we return max/min int.
1418 */
1419 static int milli_diff(const struct timeval *t1, const struct timeval *t2)
1420 {
1421 int64_t ret;
1422 int sec_diff = t1->tv_sec - t2->tv_sec;
1423 int usec_diff = t1->tv_usec - t2->tv_usec;
1424 ret = usec_diff / 1000;
1425 ret += (sec_diff * 1000);
1426 return (ret > INT_MAX) ? INT_MAX : ((ret < INT_MIN) ? INT_MIN : (int)ret);
1427 }
1429 /** This handles the actual network I/O to talk to the Ceph daemons.
1430 */
1431 static int cconn_main_loop(uint32_t request_type)
1432 {
1433 int i, ret, some_unreachable = 0;
1434 struct timeval end_tv;
1435 struct cconn io_array[g_num_daemons];
1437 DEBUG("ceph plugin: entering cconn_main_loop(request_type = %d)", request_type);
1439 /* create cconn array */
1440 memset(io_array, 0, sizeof(io_array));
1441 for(i = 0; i < g_num_daemons; ++i)
1442 {
1443 io_array[i].d = g_daemons[i];
1444 io_array[i].request_type = request_type;
1445 io_array[i].state = CSTATE_UNCONNECTED;
1446 }
1448 /** Calculate the time at which we should give up */
1449 gettimeofday(&end_tv, NULL);
1450 end_tv.tv_sec += CEPH_TIMEOUT_INTERVAL;
1452 while (1)
1453 {
1454 int nfds, diff;
1455 struct timeval tv;
1456 struct cconn *polled_io_array[g_num_daemons];
1457 struct pollfd fds[g_num_daemons];
1458 memset(fds, 0, sizeof(fds));
1459 nfds = 0;
1460 for(i = 0; i < g_num_daemons; ++i)
1461 {
1462 struct cconn *io = io_array + i;
1463 ret = cconn_prepare(io, fds + nfds);
1464 if(ret < 0)
1465 {
1466 WARNING("ceph plugin: cconn_prepare(name=%s,i=%d,st=%d)=%d",
1467 io->d->name, i, io->state, ret);
1468 cconn_close(io);
1469 io->request_type = ASOK_REQ_NONE;
1470 some_unreachable = 1;
1471 }
1472 else if(ret == 1)
1473 {
1474 polled_io_array[nfds++] = io_array + i;
1475 }
1476 }
1477 if(nfds == 0)
1478 {
1479 /* finished */
1480 ret = 0;
1481 goto done;
1482 }
1483 gettimeofday(&tv, NULL);
1484 diff = milli_diff(&end_tv, &tv);
1485 if(diff <= 0)
1486 {
1487 /* Timed out */
1488 ret = -ETIMEDOUT;
1489 WARNING("ceph plugin: cconn_main_loop: timed out.");
1490 goto done;
1491 }
1492 RETRY_ON_EINTR(ret, poll(fds, nfds, diff));
1493 if(ret < 0)
1494 {
1495 ERROR("ceph plugin: poll(2) error: %d", ret);
1496 goto done;
1497 }
1498 for(i = 0; i < nfds; ++i)
1499 {
1500 struct cconn *io = polled_io_array[i];
1501 int revents = fds[i].revents;
1502 if(revents == 0)
1503 {
1504 /* do nothing */
1505 }
1506 else if(cconn_validate_revents(io, revents))
1507 {
1508 WARNING("ceph plugin: cconn(name=%s,i=%d,st=%d): "
1509 "revents validation error: "
1510 "revents=0x%08x", io->d->name, i, io->state, revents);
1511 cconn_close(io);
1512 io->request_type = ASOK_REQ_NONE;
1513 some_unreachable = 1;
1514 }
1515 else
1516 {
1517 int ret = cconn_handle_event(io);
1518 if(ret)
1519 {
1520 WARNING("ceph plugin: cconn_handle_event(name=%s,"
1521 "i=%d,st=%d): error %d", io->d->name, i, io->state, ret);
1522 cconn_close(io);
1523 io->request_type = ASOK_REQ_NONE;
1524 some_unreachable = 1;
1525 }
1526 }
1527 }
1528 }
1529 done: for(i = 0; i < g_num_daemons; ++i)
1530 {
1531 cconn_close(io_array + i);
1532 }
1533 if(some_unreachable)
1534 {
1535 DEBUG("ceph plugin: cconn_main_loop: some Ceph daemons were unreachable.");
1536 }
1537 else
1538 {
1539 DEBUG("ceph plugin: cconn_main_loop: reached all Ceph daemons :)");
1540 }
1541 return ret;
1542 }
1544 static int ceph_read(void)
1545 {
1546 return cconn_main_loop(ASOK_REQ_DATA);
1547 }
1549 /******* lifecycle *******/
1550 static int ceph_init(void)
1551 {
1552 int ret;
1553 ceph_daemons_print();
1555 ret = cconn_main_loop(ASOK_REQ_VERSION);
1557 return (ret) ? ret : 0;
1558 }
1560 static int ceph_shutdown(void)
1561 {
1562 int i;
1563 for(i = 0; i < g_num_daemons; ++i)
1564 {
1565 ceph_daemon_free(g_daemons[i]);
1566 }
1567 sfree(g_daemons);
1568 g_daemons = NULL;
1569 g_num_daemons = 0;
1570 DEBUG("ceph plugin: finished ceph_shutdown");
1571 return 0;
1572 }
1574 void module_register(void)
1575 {
1576 plugin_register_complex_config("ceph", ceph_config);
1577 plugin_register_init("ceph", ceph_init);
1578 plugin_register_read("ceph", ceph_read);
1579 plugin_register_shutdown("ceph", ceph_shutdown);
1580 }