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"
30 #include "common.h"
31 #include "plugin.h"
33 #include <arpa/inet.h>
34 #include <errno.h>
35 #include <fcntl.h>
36 #include <yajl/yajl_parse.h>
37 #if HAVE_YAJL_YAJL_VERSION_H
38 #include <yajl/yajl_version.h>
39 #endif
41 #include <limits.h>
42 #include <poll.h>
43 #include <stdint.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <strings.h>
48 #include <sys/socket.h>
49 #include <sys/time.h>
50 #include <sys/types.h>
51 #include <sys/un.h>
52 #include <unistd.h>
53 #include <math.h>
54 #include <inttypes.h>
56 #define RETRY_AVGCOUNT -1
58 #if defined(YAJL_MAJOR) && (YAJL_MAJOR > 1)
59 # define HAVE_YAJL_V2 1
60 #endif
62 #define RETRY_ON_EINTR(ret, expr) \
63 while(1) { \
64 ret = expr; \
65 if(ret >= 0) \
66 break; \
67 ret = -errno; \
68 if(ret != -EINTR) \
69 break; \
70 }
72 /** Timeout interval in seconds */
73 #define CEPH_TIMEOUT_INTERVAL 1
75 /** Maximum path length for a UNIX domain socket on this system */
76 #define UNIX_DOMAIN_SOCK_PATH_MAX (sizeof(((struct sockaddr_un*)0)->sun_path))
78 /** Yajl callback returns */
79 #define CEPH_CB_CONTINUE 1
80 #define CEPH_CB_ABORT 0
82 #if HAVE_YAJL_V2
83 typedef size_t yajl_len_t;
84 #else
85 typedef unsigned int yajl_len_t;
86 #endif
88 /** Number of types for ceph defined in types.db */
89 #define CEPH_DSET_TYPES_NUM 3
90 /** ceph types enum */
91 enum ceph_dset_type_d
92 {
93 DSET_LATENCY = 0,
94 DSET_BYTES = 1,
95 DSET_RATE = 2,
96 DSET_TYPE_UNFOUND = 1000
97 };
99 /** Valid types for ceph defined in types.db */
100 const char * ceph_dset_types [CEPH_DSET_TYPES_NUM] =
101 {"ceph_latency", "ceph_bytes", "ceph_rate"};
103 /******* ceph_daemon *******/
104 struct ceph_daemon
105 {
106 /** Version of the admin_socket interface */
107 uint32_t version;
108 /** daemon name **/
109 char name[DATA_MAX_NAME_LEN];
111 /** Path to the socket that we use to talk to the ceph daemon */
112 char asok_path[UNIX_DOMAIN_SOCK_PATH_MAX];
114 /** Number of counters */
115 int ds_num;
116 /** Track ds types */
117 uint32_t *ds_types;
118 /** Track ds names to match with types */
119 char **ds_names;
121 /**
122 * Keep track of last data for latency values so we can calculate rate
123 * since last poll.
124 */
125 struct last_data **last_poll_data;
126 /** index of last poll data */
127 int last_idx;
128 };
130 /******* JSON parsing *******/
131 typedef int (*node_handler_t)(void *, const char*, const char*);
133 /** Track state and handler while parsing JSON */
134 struct yajl_struct
135 {
136 node_handler_t handler;
137 void * handler_arg;
138 struct {
139 char key[DATA_MAX_NAME_LEN];
140 int key_len;
141 } state[YAJL_MAX_DEPTH];
142 int depth;
143 };
144 typedef struct yajl_struct yajl_struct;
146 enum perfcounter_type_d
147 {
148 PERFCOUNTER_LATENCY = 0x4, PERFCOUNTER_DERIVE = 0x8,
149 };
151 /** Give user option to use default (long run = since daemon started) avg */
152 static int long_run_latency_avg = 0;
154 /**
155 * Give user option to use default type for special cases -
156 * filestore.journal_wr_bytes is currently only metric here. Ceph reports the
157 * type as a sum/count pair and will calculate it the same as a latency value.
158 * All other "bytes" metrics (excluding the used/capacity bytes for the OSD)
159 * use the DERIVE type. Unless user specifies to use given type, convert this
160 * metric to use DERIVE.
161 */
162 static int convert_special_metrics = 1;
164 /** Array of daemons to monitor */
165 static struct ceph_daemon **g_daemons = NULL;
167 /** Number of elements in g_daemons */
168 static int g_num_daemons = 0;
170 /**
171 * A set of data that we build up in memory while parsing the JSON.
172 */
173 struct values_tmp
174 {
175 /** ceph daemon we are processing data for*/
176 struct ceph_daemon *d;
177 /** track avgcount across counters for avgcount/sum latency pairs */
178 uint64_t avgcount;
179 /** current index of counters - used to get type of counter */
180 int index;
181 /** do we already have an avgcount for latency pair */
182 int avgcount_exists;
183 /**
184 * similar to index, but current index of latency type counters -
185 * used to get last poll data of counter
186 */
187 int latency_index;
188 /**
189 * values list - maintain across counters since
190 * host/plugin/plugin instance are always the same
191 */
192 value_list_t vlist;
193 };
195 /**
196 * A set of count/sum pairs to keep track of latency types and get difference
197 * between this poll data and last poll data.
198 */
199 struct last_data
200 {
201 char ds_name[DATA_MAX_NAME_LEN];
202 double last_sum;
203 uint64_t last_count;
204 };
206 /******* network I/O *******/
207 enum cstate_t
208 {
209 CSTATE_UNCONNECTED = 0,
210 CSTATE_WRITE_REQUEST,
211 CSTATE_READ_VERSION,
212 CSTATE_READ_AMT,
213 CSTATE_READ_JSON,
214 };
216 enum request_type_t
217 {
218 ASOK_REQ_VERSION = 0,
219 ASOK_REQ_DATA = 1,
220 ASOK_REQ_SCHEMA = 2,
221 ASOK_REQ_NONE = 1000,
222 };
224 struct cconn
225 {
226 /** The Ceph daemon that we're talking to */
227 struct ceph_daemon *d;
229 /** Request type */
230 uint32_t request_type;
232 /** The connection state */
233 enum cstate_t state;
235 /** The socket we use to talk to this daemon */
236 int asok;
238 /** The amount of data remaining to read / write. */
239 uint32_t amt;
241 /** Length of the JSON to read */
242 uint32_t json_len;
244 /** Buffer containing JSON data */
245 unsigned char *json;
247 /** Keep data important to yajl processing */
248 struct yajl_struct yajl;
249 };
251 static int ceph_cb_null(void *ctx)
252 {
253 return CEPH_CB_CONTINUE;
254 }
256 static int ceph_cb_boolean(void *ctx, int bool_val)
257 {
258 return CEPH_CB_CONTINUE;
259 }
261 #define BUFFER_ADD(dest, src) do { \
262 size_t dest_size = sizeof (dest); \
263 strncat ((dest), (src), dest_size - strlen (dest)); \
264 (dest)[dest_size - 1] = 0; \
265 } while (0)
267 static int
268 ceph_cb_number(void *ctx, const char *number_val, yajl_len_t number_len)
269 {
270 yajl_struct *yajl = (yajl_struct*)ctx;
271 char buffer[number_len+1];
272 int i, status;
273 char key[2 * DATA_MAX_NAME_LEN];
274 _Bool latency_type = 0;
276 memcpy(buffer, number_val, number_len);
277 buffer[sizeof(buffer) - 1] = 0;
279 sstrncpy (key, yajl->state[0].key, sizeof (key));
280 for (i = 1; i < yajl->depth; i++)
281 {
282 /* Special case for latency metrics. */
283 if ((i == yajl->depth-1)
284 && ((strcmp(yajl->state[i].key,"avgcount") == 0)
285 || (strcmp(yajl->state[i].key,"sum") == 0)))
286 {
287 /* Super-special case for filestore:JournalWrBytes. For some
288 * reason, Ceph schema encodes this as a count/sum pair while all
289 * other "Bytes" data (excluding used/capacity bytes for OSD space)
290 * uses a single "Derive" type. To spare further confusion, keep
291 * this KPI as the same type of other "Bytes". Instead of keeping
292 * an "average" or "rate", use the "sum" in the pair and assign
293 * that to the derive value. */
294 if (convert_special_metrics && (i >= 2)
295 && (strcmp("filestore", yajl->state[i-2].key) == 0)
296 && (strcmp("journal_wr_bytes", yajl->state[i-1].key) == 0)
297 && (strcmp("avgcount", yajl->state[i].key) == 0))
298 {
299 DEBUG("ceph plugin: Skipping avgcount for filestore.JournalWrBytes");
300 yajl->depth -= 1;
301 return CEPH_CB_CONTINUE;
302 }
304 /* Don't add "avgcount" or "sum" to the key just yet. If the
305 * handler function signals RETRY_AVGCOUNT, we'll add it and try
306 * again. */
307 latency_type = 1;
308 break;
309 }
311 BUFFER_ADD (key, ".");
312 BUFFER_ADD (key, yajl->state[i].key);
313 }
315 status = yajl->handler(yajl->handler_arg, buffer, key);
316 if((status == RETRY_AVGCOUNT) && latency_type)
317 {
318 /* Add previously skipped part of the key, either "avgcount" or "sum",
319 * and try again. */
320 BUFFER_ADD (key, ".");
321 BUFFER_ADD (key, yajl->state[yajl->depth-1].key);
323 status = yajl->handler(yajl->handler_arg, buffer, key);
324 }
326 if(status == -ENOMEM)
327 {
328 ERROR("ceph plugin: memory allocation failed");
329 return CEPH_CB_ABORT;
330 }
332 yajl->depth -= 1;
333 return CEPH_CB_CONTINUE;
334 }
336 static int ceph_cb_string(void *ctx, const unsigned char *string_val,
337 yajl_len_t string_len)
338 {
339 return CEPH_CB_CONTINUE;
340 }
342 static int ceph_cb_start_map(void *ctx)
343 {
344 return CEPH_CB_CONTINUE;
345 }
347 static int
348 ceph_cb_map_key(void *ctx, const unsigned char *key, yajl_len_t string_len)
349 {
350 yajl_struct *yajl = (yajl_struct*)ctx;
352 if((yajl->depth+1) >= YAJL_MAX_DEPTH)
353 {
354 ERROR("ceph plugin: depth exceeds max, aborting.");
355 return CEPH_CB_ABORT;
356 }
358 char buffer[string_len+1];
360 memcpy(buffer, key, string_len);
361 buffer[sizeof(buffer) - 1] = 0;
363 snprintf(yajl->state[yajl->depth].key, sizeof(buffer), "%s", buffer);
364 yajl->state[yajl->depth].key_len = sizeof(buffer);
365 yajl->depth = (yajl->depth + 1);
367 return CEPH_CB_CONTINUE;
368 }
370 static int ceph_cb_end_map(void *ctx)
371 {
372 yajl_struct *yajl = (yajl_struct*)ctx;
374 yajl->depth = (yajl->depth - 1);
375 return CEPH_CB_CONTINUE;
376 }
378 static int ceph_cb_start_array(void *ctx)
379 {
380 return CEPH_CB_CONTINUE;
381 }
383 static int ceph_cb_end_array(void *ctx)
384 {
385 return CEPH_CB_CONTINUE;
386 }
388 static yajl_callbacks callbacks = {
389 ceph_cb_null,
390 ceph_cb_boolean,
391 NULL,
392 NULL,
393 ceph_cb_number,
394 ceph_cb_string,
395 ceph_cb_start_map,
396 ceph_cb_map_key,
397 ceph_cb_end_map,
398 ceph_cb_start_array,
399 ceph_cb_end_array
400 };
402 static void ceph_daemon_print(const struct ceph_daemon *d)
403 {
404 DEBUG("ceph plugin: name=%s, asok_path=%s", d->name, d->asok_path);
405 }
407 static void ceph_daemons_print(void)
408 {
409 int i;
410 for(i = 0; i < g_num_daemons; ++i)
411 {
412 ceph_daemon_print(g_daemons[i]);
413 }
414 }
416 static void ceph_daemon_free(struct ceph_daemon *d)
417 {
418 int i = 0;
419 for(; i < d->last_idx; i++)
420 {
421 sfree(d->last_poll_data[i]);
422 }
423 sfree(d->last_poll_data);
424 d->last_poll_data = NULL;
425 d->last_idx = 0;
426 for(i = 0; i < d->ds_num; i++)
427 {
428 sfree(d->ds_names[i]);
429 }
430 sfree(d->ds_types);
431 sfree(d->ds_names);
432 sfree(d);
433 }
435 /* compact_ds_name removed the special characters ":", "_", "-" and "+" from the
436 * intput string. Characters following these special characters are capitalized.
437 * Trailing "+" and "-" characters are replaces with the strings "Plus" and
438 * "Minus". */
439 static int compact_ds_name (char *buffer, size_t buffer_size, char const *src)
440 {
441 char *src_copy;
442 size_t src_len;
443 char *ptr = buffer;
444 size_t ptr_size = buffer_size;
445 _Bool append_plus = 0;
446 _Bool append_minus = 0;
448 if ((buffer == NULL) || (buffer_size <= strlen ("Minus")) || (src == NULL))
449 return EINVAL;
451 src_copy = strdup (src);
452 src_len = strlen(src);
454 /* Remove trailing "+" and "-". */
455 if (src_copy[src_len - 1] == '+')
456 {
457 append_plus = 1;
458 src_len--;
459 src_copy[src_len] = 0;
460 }
461 else if (src_copy[src_len - 1] == '-')
462 {
463 append_minus = 1;
464 src_len--;
465 src_copy[src_len] = 0;
466 }
468 /* Split at special chars, capitalize first character, append to buffer. */
469 char *dummy = src_copy;
470 char *token;
471 char *save_ptr = NULL;
472 while ((token = strtok_r (dummy, ":_-+", &save_ptr)) != NULL)
473 {
474 size_t len;
476 dummy = NULL;
478 token[0] = toupper ((int) token[0]);
480 assert (ptr_size > 1);
482 len = strlen (token);
483 if (len >= ptr_size)
484 len = ptr_size - 1;
486 assert (len > 0);
487 assert (len < ptr_size);
489 sstrncpy (ptr, token, len + 1);
490 ptr += len;
491 ptr_size -= len;
493 assert (*ptr == 0);
494 if (ptr_size <= 1)
495 break;
496 }
498 /* Append "Plus" or "Minus" if "+" or "-" has been stripped above. */
499 if (append_plus || append_minus)
500 {
501 char const *append = "Plus";
502 if (append_minus)
503 append = "Minus";
505 size_t offset = buffer_size - (strlen (append) + 1);
506 if (offset > strlen (buffer))
507 offset = strlen (buffer);
509 sstrncpy (buffer + offset, append, buffer_size - offset);
510 }
512 sfree (src_copy);
513 return 0;
514 }
516 static _Bool has_suffix (char const *str, char const *suffix)
517 {
518 size_t str_len = strlen (str);
519 size_t suffix_len = strlen (suffix);
520 size_t offset;
522 if (suffix_len > str_len)
523 return 0;
524 offset = str_len - suffix_len;
526 if (strcmp (str + offset, suffix) == 0)
527 return 1;
529 return 0;
530 }
532 /* count_parts returns the number of elements a "foo.bar.baz" style key has. */
533 static size_t count_parts (char const *key)
534 {
535 char const *ptr;
536 size_t parts_num = 0;
538 for (ptr = key; ptr != NULL; ptr = strchr (ptr + 1, '.'))
539 parts_num++;
541 return parts_num;
542 }
544 /**
545 * Parse key to remove "type" if this is for schema and initiate compaction
546 */
547 static int parse_keys (char *buffer, size_t buffer_size, const char *key_str)
548 {
549 char tmp[2 * buffer_size];
551 if (buffer == NULL || buffer_size == 0 || key_str == NULL || strlen (key_str) == 0)
552 return EINVAL;
554 if ((count_parts (key_str) > 2) && has_suffix (key_str, ".type"))
555 {
556 /* strip ".type" suffix iff the key has more than two parts. */
557 size_t sz = strlen (key_str) - strlen (".type") + 1;
559 if (sz > sizeof (tmp))
560 sz = sizeof (tmp);
561 sstrncpy (tmp, key_str, sz);
562 }
563 else
564 {
565 sstrncpy (tmp, key_str, sizeof (tmp));
566 }
568 return compact_ds_name (buffer, buffer_size, tmp);
569 }
571 /**
572 * while parsing ceph admin socket schema, save counter name and type for later
573 * data processing
574 */
575 static int ceph_daemon_add_ds_entry(struct ceph_daemon *d, const char *name,
576 int pc_type)
577 {
578 uint32_t type;
579 char ds_name[DATA_MAX_NAME_LEN];
580 memset(ds_name, 0, sizeof(ds_name));
582 if(convert_special_metrics)
583 {
584 /**
585 * Special case for filestore:JournalWrBytes. For some reason, Ceph
586 * schema encodes this as a count/sum pair while all other "Bytes" data
587 * (excluding used/capacity bytes for OSD space) uses a single "Derive"
588 * type. To spare further confusion, keep this KPI as the same type of
589 * other "Bytes". Instead of keeping an "average" or "rate", use the
590 * "sum" in the pair and assign that to the derive value.
591 */
592 if((strcmp(name,"filestore.journal_wr_bytes.type") == 0))
593 {
594 pc_type = 10;
595 }
596 }
598 d->ds_names = realloc(d->ds_names, sizeof(char *) * (d->ds_num + 1));
599 if(!d->ds_names)
600 {
601 return -ENOMEM;
602 }
604 d->ds_types = realloc(d->ds_types, sizeof(uint32_t) * (d->ds_num + 1));
605 if(!d->ds_types)
606 {
607 return -ENOMEM;
608 }
610 d->ds_names[d->ds_num] = malloc(sizeof(char) * DATA_MAX_NAME_LEN);
611 if(!d->ds_names[d->ds_num])
612 {
613 return -ENOMEM;
614 }
616 type = (pc_type & PERFCOUNTER_DERIVE) ? DSET_RATE :
617 ((pc_type & PERFCOUNTER_LATENCY) ? DSET_LATENCY : DSET_BYTES);
618 d->ds_types[d->ds_num] = type;
620 if (parse_keys(ds_name, sizeof (ds_name), name))
621 {
622 return 1;
623 }
625 sstrncpy(d->ds_names[d->ds_num], ds_name, DATA_MAX_NAME_LEN -1);
626 d->ds_num = (d->ds_num + 1);
628 return 0;
629 }
631 /******* ceph_config *******/
632 static int cc_handle_str(struct oconfig_item_s *item, char *dest, int dest_len)
633 {
634 const char *val;
635 if(item->values_num != 1)
636 {
637 return -ENOTSUP;
638 }
639 if(item->values[0].type != OCONFIG_TYPE_STRING)
640 {
641 return -ENOTSUP;
642 }
643 val = item->values[0].value.string;
644 if(snprintf(dest, dest_len, "%s", val) > (dest_len - 1))
645 {
646 ERROR("ceph plugin: configuration parameter '%s' is too long.\n",
647 item->key);
648 return -ENAMETOOLONG;
649 }
650 return 0;
651 }
653 static int cc_handle_bool(struct oconfig_item_s *item, int *dest)
654 {
655 if(item->values_num != 1)
656 {
657 return -ENOTSUP;
658 }
660 if(item->values[0].type != OCONFIG_TYPE_BOOLEAN)
661 {
662 return -ENOTSUP;
663 }
665 *dest = (item->values[0].value.boolean) ? 1 : 0;
666 return 0;
667 }
669 static int cc_add_daemon_config(oconfig_item_t *ci)
670 {
671 int ret, i;
672 struct ceph_daemon *nd, cd;
673 struct ceph_daemon **tmp;
674 memset(&cd, 0, sizeof(struct ceph_daemon));
676 if((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
677 {
678 WARNING("ceph plugin: `Daemon' blocks need exactly one string "
679 "argument.");
680 return (-1);
681 }
683 ret = cc_handle_str(ci, cd.name, DATA_MAX_NAME_LEN);
684 if(ret)
685 {
686 return ret;
687 }
689 for(i=0; i < ci->children_num; i++)
690 {
691 oconfig_item_t *child = ci->children + i;
693 if(strcasecmp("SocketPath", child->key) == 0)
694 {
695 ret = cc_handle_str(child, cd.asok_path, sizeof(cd.asok_path));
696 if(ret)
697 {
698 return ret;
699 }
700 }
701 else
702 {
703 WARNING("ceph plugin: ignoring unknown option %s", child->key);
704 }
705 }
706 if(cd.name[0] == '\0')
707 {
708 ERROR("ceph plugin: you must configure a daemon name.\n");
709 return -EINVAL;
710 }
711 else if(cd.asok_path[0] == '\0')
712 {
713 ERROR("ceph plugin(name=%s): you must configure an administrative "
714 "socket path.\n", cd.name);
715 return -EINVAL;
716 }
717 else if(!((cd.asok_path[0] == '/') ||
718 (cd.asok_path[0] == '.' && cd.asok_path[1] == '/')))
719 {
720 ERROR("ceph plugin(name=%s): administrative socket paths must begin "
721 "with '/' or './' Can't parse: '%s'\n", cd.name, cd.asok_path);
722 return -EINVAL;
723 }
725 tmp = realloc(g_daemons, (g_num_daemons+1) * sizeof(*g_daemons));
726 if(tmp == NULL)
727 {
728 /* The positive return value here indicates that this is a
729 * runtime error, not a configuration error. */
730 return ENOMEM;
731 }
732 g_daemons = tmp;
734 nd = malloc(sizeof(*nd));
735 if(!nd)
736 {
737 return ENOMEM;
738 }
739 memcpy(nd, &cd, sizeof(*nd));
740 g_daemons[g_num_daemons++] = nd;
741 return 0;
742 }
744 static int ceph_config(oconfig_item_t *ci)
745 {
746 int ret, i;
748 for(i = 0; i < ci->children_num; ++i)
749 {
750 oconfig_item_t *child = ci->children + i;
751 if(strcasecmp("Daemon", child->key) == 0)
752 {
753 ret = cc_add_daemon_config(child);
754 if(ret == ENOMEM)
755 {
756 ERROR("ceph plugin: Couldn't allocate memory");
757 return ret;
758 }
759 else if(ret)
760 {
761 //process other daemons and ignore this one
762 continue;
763 }
764 }
765 else if(strcasecmp("LongRunAvgLatency", child->key) == 0)
766 {
767 ret = cc_handle_bool(child, &long_run_latency_avg);
768 if(ret)
769 {
770 return ret;
771 }
772 }
773 else if(strcasecmp("ConvertSpecialMetricTypes", child->key) == 0)
774 {
775 ret = cc_handle_bool(child, &convert_special_metrics);
776 if(ret)
777 {
778 return ret;
779 }
780 }
781 else
782 {
783 WARNING("ceph plugin: ignoring unknown option %s", child->key);
784 }
785 }
786 return 0;
787 }
789 /**
790 * Parse JSON and get error message if present
791 */
792 static int
793 traverse_json(const unsigned char *json, uint32_t json_len, yajl_handle hand)
794 {
795 yajl_status status = yajl_parse(hand, json, json_len);
796 unsigned char *msg;
798 switch(status)
799 {
800 case yajl_status_error:
801 msg = yajl_get_error(hand, /* verbose = */ 1,
802 /* jsonText = */ (unsigned char *) json,
803 (unsigned int) json_len);
804 ERROR ("ceph plugin: yajl_parse failed: %s", msg);
805 yajl_free_error(hand, msg);
806 return 1;
807 case yajl_status_client_canceled:
808 return 1;
809 default:
810 return 0;
811 }
812 }
814 /**
815 * Add entry for each counter while parsing schema
816 */
817 static int
818 node_handler_define_schema(void *arg, const char *val, const char *key)
819 {
820 struct ceph_daemon *d = (struct ceph_daemon *) arg;
821 int pc_type;
822 pc_type = atoi(val);
823 return ceph_daemon_add_ds_entry(d, key, pc_type);
824 }
826 /**
827 * Latency counter does not yet have an entry in last poll data - add it.
828 */
829 static int add_last(struct ceph_daemon *d, const char *ds_n, double cur_sum,
830 uint64_t cur_count)
831 {
832 d->last_poll_data[d->last_idx] = malloc(1 * sizeof(struct last_data));
833 if(!d->last_poll_data[d->last_idx])
834 {
835 return -ENOMEM;
836 }
837 sstrncpy(d->last_poll_data[d->last_idx]->ds_name,ds_n,
838 sizeof(d->last_poll_data[d->last_idx]->ds_name));
839 d->last_poll_data[d->last_idx]->last_sum = cur_sum;
840 d->last_poll_data[d->last_idx]->last_count = cur_count;
841 d->last_idx = (d->last_idx + 1);
842 return 0;
843 }
845 /**
846 * Update latency counter or add new entry if it doesn't exist
847 */
848 static int update_last(struct ceph_daemon *d, const char *ds_n, int index,
849 double cur_sum, uint64_t cur_count)
850 {
851 if((d->last_idx > index) && (strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0))
852 {
853 d->last_poll_data[index]->last_sum = cur_sum;
854 d->last_poll_data[index]->last_count = cur_count;
855 return 0;
856 }
858 if(!d->last_poll_data)
859 {
860 d->last_poll_data = malloc(1 * sizeof(struct last_data *));
861 if(!d->last_poll_data)
862 {
863 return -ENOMEM;
864 }
865 }
866 else
867 {
868 struct last_data **tmp_last = realloc(d->last_poll_data,
869 ((d->last_idx+1) * sizeof(struct last_data *)));
870 if(!tmp_last)
871 {
872 return -ENOMEM;
873 }
874 d->last_poll_data = tmp_last;
875 }
876 return add_last(d, ds_n, cur_sum, cur_count);
877 }
879 /**
880 * If using index guess failed (shouldn't happen, but possible if counters
881 * get rearranged), resort to searching for counter name
882 */
883 static int backup_search_for_last_avg(struct ceph_daemon *d, const char *ds_n)
884 {
885 int i = 0;
886 for(; i < d->last_idx; i++)
887 {
888 if(strcmp(d->last_poll_data[i]->ds_name, ds_n) == 0)
889 {
890 return i;
891 }
892 }
893 return -1;
894 }
896 /**
897 * Calculate average b/t current data and last poll data
898 * if last poll data exists
899 */
900 static double get_last_avg(struct ceph_daemon *d, const char *ds_n, int index,
901 double cur_sum, uint64_t cur_count)
902 {
903 double result = -1.1, sum_delt = 0.0;
904 uint64_t count_delt = 0;
905 int tmp_index = 0;
906 if(d->last_idx > index)
907 {
908 if(strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0)
909 {
910 tmp_index = index;
911 }
912 //test previous index
913 else if((index > 0) && (strcmp(d->last_poll_data[index-1]->ds_name, ds_n) == 0))
914 {
915 tmp_index = (index - 1);
916 }
917 else
918 {
919 tmp_index = backup_search_for_last_avg(d, ds_n);
920 }
922 if((tmp_index > -1) && (cur_count > d->last_poll_data[tmp_index]->last_count))
923 {
924 sum_delt = (cur_sum - d->last_poll_data[tmp_index]->last_sum);
925 count_delt = (cur_count - d->last_poll_data[tmp_index]->last_count);
926 result = (sum_delt / count_delt);
927 }
928 }
930 if(result == -1.1)
931 {
932 result = NAN;
933 }
934 if(update_last(d, ds_n, tmp_index, cur_sum, cur_count) == -ENOMEM)
935 {
936 return -ENOMEM;
937 }
938 return result;
939 }
941 /**
942 * If using index guess failed, resort to searching for counter name
943 */
944 static uint32_t backup_search_for_type(struct ceph_daemon *d, char *ds_name)
945 {
946 int idx = 0;
947 for(; idx < d->ds_num; idx++)
948 {
949 if(strcmp(d->ds_names[idx], ds_name) == 0)
950 {
951 return d->ds_types[idx];
952 }
953 }
954 return DSET_TYPE_UNFOUND;
955 }
957 /**
958 * Process counter data and dispatch values
959 */
960 static int node_handler_fetch_data(void *arg, const char *val, const char *key)
961 {
962 value_t uv;
963 double tmp_d;
964 uint64_t tmp_u;
965 struct values_tmp *vtmp = (struct values_tmp*) arg;
966 uint32_t type = DSET_TYPE_UNFOUND;
967 int index = vtmp->index;
969 char ds_name[DATA_MAX_NAME_LEN];
970 memset(ds_name, 0, sizeof(ds_name));
972 if (parse_keys (ds_name, sizeof (ds_name), key))
973 {
974 return 1;
975 }
977 if(index >= vtmp->d->ds_num)
978 {
979 //don't overflow bounds of array
980 index = (vtmp->d->ds_num - 1);
981 }
983 /**
984 * counters should remain in same order we parsed schema... we maintain the
985 * index variable to keep track of current point in list of counters. first
986 * use index to guess point in array for retrieving type. if that doesn't
987 * work, use the old way to get the counter type
988 */
989 if(strcmp(ds_name, vtmp->d->ds_names[index]) == 0)
990 {
991 //found match
992 type = vtmp->d->ds_types[index];
993 }
994 else if((index > 0) && (strcmp(ds_name, vtmp->d->ds_names[index-1]) == 0))
995 {
996 //try previous key
997 type = vtmp->d->ds_types[index-1];
998 }
1000 if(type == DSET_TYPE_UNFOUND)
1001 {
1002 //couldn't find right type by guessing, check the old way
1003 type = backup_search_for_type(vtmp->d, ds_name);
1004 }
1006 switch(type)
1007 {
1008 case DSET_LATENCY:
1009 if(vtmp->avgcount_exists == -1)
1010 {
1011 sscanf(val, "%" PRIu64, &vtmp->avgcount);
1012 vtmp->avgcount_exists = 0;
1013 //return after saving avgcount - don't dispatch value
1014 //until latency calculation
1015 return 0;
1016 }
1017 else
1018 {
1019 double sum, result;
1020 sscanf(val, "%lf", &sum);
1022 if(vtmp->avgcount == 0)
1023 {
1024 vtmp->avgcount = 1;
1025 }
1027 /** User wants latency values as long run avg */
1028 if(long_run_latency_avg)
1029 {
1030 result = (sum / vtmp->avgcount);
1031 }
1032 else
1033 {
1034 result = get_last_avg(vtmp->d, ds_name, vtmp->latency_index, sum, vtmp->avgcount);
1035 if(result == -ENOMEM)
1036 {
1037 return -ENOMEM;
1038 }
1039 }
1041 uv.gauge = result;
1042 vtmp->avgcount_exists = -1;
1043 vtmp->latency_index = (vtmp->latency_index + 1);
1044 }
1045 break;
1046 case DSET_BYTES:
1047 sscanf(val, "%lf", &tmp_d);
1048 uv.gauge = tmp_d;
1049 break;
1050 case DSET_RATE:
1051 sscanf(val, "%" PRIu64, &tmp_u);
1052 uv.derive = tmp_u;
1053 break;
1054 case DSET_TYPE_UNFOUND:
1055 default:
1056 ERROR("ceph plugin: ds %s was not properly initialized.", ds_name);
1057 return -1;
1058 }
1060 sstrncpy(vtmp->vlist.type, ceph_dset_types[type], sizeof(vtmp->vlist.type));
1061 sstrncpy(vtmp->vlist.type_instance, ds_name, sizeof(vtmp->vlist.type_instance));
1062 vtmp->vlist.values = &uv;
1063 vtmp->vlist.values_len = 1;
1065 vtmp->index = (vtmp->index + 1);
1066 plugin_dispatch_values(&vtmp->vlist);
1068 return 0;
1069 }
1071 static int cconn_connect(struct cconn *io)
1072 {
1073 struct sockaddr_un address;
1074 int flags, fd, err;
1075 if(io->state != CSTATE_UNCONNECTED)
1076 {
1077 ERROR("ceph plugin: cconn_connect: io->state != CSTATE_UNCONNECTED");
1078 return -EDOM;
1079 }
1080 fd = socket(PF_UNIX, SOCK_STREAM, 0);
1081 if(fd < 0)
1082 {
1083 int err = -errno;
1084 ERROR("ceph plugin: cconn_connect: socket(PF_UNIX, SOCK_STREAM, 0) "
1085 "failed: error %d", err);
1086 return err;
1087 }
1088 memset(&address, 0, sizeof(struct sockaddr_un));
1089 address.sun_family = AF_UNIX;
1090 snprintf(address.sun_path, sizeof(address.sun_path), "%s",
1091 io->d->asok_path);
1092 RETRY_ON_EINTR(err,
1093 connect(fd, (struct sockaddr *) &address, sizeof(struct sockaddr_un)));
1094 if(err < 0)
1095 {
1096 ERROR("ceph plugin: cconn_connect: connect(%d) failed: error %d",
1097 fd, err);
1098 close(fd);
1099 return err;
1100 }
1102 flags = fcntl(fd, F_GETFL, 0);
1103 if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) != 0)
1104 {
1105 err = -errno;
1106 ERROR("ceph plugin: cconn_connect: fcntl(%d, O_NONBLOCK) error %d",
1107 fd, err);
1108 close(fd);
1109 return err;
1110 }
1111 io->asok = fd;
1112 io->state = CSTATE_WRITE_REQUEST;
1113 io->amt = 0;
1114 io->json_len = 0;
1115 io->json = NULL;
1116 return 0;
1117 }
1119 static void cconn_close(struct cconn *io)
1120 {
1121 io->state = CSTATE_UNCONNECTED;
1122 if(io->asok != -1)
1123 {
1124 int res;
1125 RETRY_ON_EINTR(res, close(io->asok));
1126 }
1127 io->asok = -1;
1128 io->amt = 0;
1129 io->json_len = 0;
1130 sfree(io->json);
1131 io->json = NULL;
1132 }
1134 /* Process incoming JSON counter data */
1135 static int
1136 cconn_process_data(struct cconn *io, yajl_struct *yajl, yajl_handle hand)
1137 {
1138 int ret;
1139 struct values_tmp *vtmp = calloc(1, sizeof(struct values_tmp) * 1);
1140 if(!vtmp)
1141 {
1142 return -ENOMEM;
1143 }
1145 vtmp->vlist = (value_list_t)VALUE_LIST_INIT;
1146 sstrncpy(vtmp->vlist.host, hostname_g, sizeof(vtmp->vlist.host));
1147 sstrncpy(vtmp->vlist.plugin, "ceph", sizeof(vtmp->vlist.plugin));
1148 sstrncpy(vtmp->vlist.plugin_instance, io->d->name, sizeof(vtmp->vlist.plugin_instance));
1150 vtmp->d = io->d;
1151 vtmp->avgcount_exists = -1;
1152 vtmp->latency_index = 0;
1153 vtmp->index = 0;
1154 yajl->handler_arg = vtmp;
1155 ret = traverse_json(io->json, io->json_len, hand);
1156 sfree(vtmp);
1157 return ret;
1158 }
1160 /**
1161 * Initiate JSON parsing and print error if one occurs
1162 */
1163 static int cconn_process_json(struct cconn *io)
1164 {
1165 if((io->request_type != ASOK_REQ_DATA) &&
1166 (io->request_type != ASOK_REQ_SCHEMA))
1167 {
1168 return -EDOM;
1169 }
1171 int result = 1;
1172 yajl_handle hand;
1173 yajl_status status;
1175 hand = yajl_alloc(&callbacks,
1176 #if HAVE_YAJL_V2
1177 /* alloc funcs = */ NULL,
1178 #else
1179 /* alloc funcs = */ NULL, NULL,
1180 #endif
1181 /* context = */ (void *)(&io->yajl));
1183 if(!hand)
1184 {
1185 ERROR ("ceph plugin: yajl_alloc failed.");
1186 return ENOMEM;
1187 }
1189 io->yajl.depth = 0;
1191 switch(io->request_type)
1192 {
1193 case ASOK_REQ_DATA:
1194 io->yajl.handler = node_handler_fetch_data;
1195 result = cconn_process_data(io, &io->yajl, hand);
1196 break;
1197 case ASOK_REQ_SCHEMA:
1198 //init daemon specific variables
1199 io->d->ds_num = 0;
1200 io->d->last_idx = 0;
1201 io->d->last_poll_data = NULL;
1202 io->yajl.handler = node_handler_define_schema;
1203 io->yajl.handler_arg = io->d;
1204 result = traverse_json(io->json, io->json_len, hand);
1205 break;
1206 }
1208 if(result)
1209 {
1210 goto done;
1211 }
1213 #if HAVE_YAJL_V2
1214 status = yajl_complete_parse(hand);
1215 #else
1216 status = yajl_parse_complete(hand);
1217 #endif
1219 if (status != yajl_status_ok)
1220 {
1221 unsigned char *errmsg = yajl_get_error (hand, /* verbose = */ 0,
1222 /* jsonText = */ NULL, /* jsonTextLen = */ 0);
1223 ERROR ("ceph plugin: yajl_parse_complete failed: %s",
1224 (char *) errmsg);
1225 yajl_free_error (hand, errmsg);
1226 yajl_free (hand);
1227 return 1;
1228 }
1230 done:
1231 yajl_free (hand);
1232 return result;
1233 }
1235 static int cconn_validate_revents(struct cconn *io, int revents)
1236 {
1237 if(revents & POLLERR)
1238 {
1239 ERROR("ceph plugin: cconn_validate_revents(name=%s): got POLLERR",
1240 io->d->name);
1241 return -EIO;
1242 }
1243 switch (io->state)
1244 {
1245 case CSTATE_WRITE_REQUEST:
1246 return (revents & POLLOUT) ? 0 : -EINVAL;
1247 case CSTATE_READ_VERSION:
1248 case CSTATE_READ_AMT:
1249 case CSTATE_READ_JSON:
1250 return (revents & POLLIN) ? 0 : -EINVAL;
1251 default:
1252 ERROR("ceph plugin: cconn_validate_revents(name=%s) got to "
1253 "illegal state on line %d", io->d->name, __LINE__);
1254 return -EDOM;
1255 }
1256 }
1258 /** Handle a network event for a connection */
1259 static int cconn_handle_event(struct cconn *io)
1260 {
1261 int ret;
1262 switch (io->state)
1263 {
1264 case CSTATE_UNCONNECTED:
1265 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1266 "state on line %d", io->d->name, __LINE__);
1268 return -EDOM;
1269 case CSTATE_WRITE_REQUEST:
1270 {
1271 char cmd[32];
1272 snprintf(cmd, sizeof(cmd), "%s%d%s", "{ \"prefix\": \"",
1273 io->request_type, "\" }\n");
1274 size_t cmd_len = strlen(cmd);
1275 RETRY_ON_EINTR(ret,
1276 write(io->asok, ((char*)&cmd) + io->amt, cmd_len - io->amt));
1277 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,amt=%d,ret=%d)",
1278 io->d->name, io->state, io->amt, ret);
1279 if(ret < 0)
1280 {
1281 return ret;
1282 }
1283 io->amt += ret;
1284 if(io->amt >= cmd_len)
1285 {
1286 io->amt = 0;
1287 switch (io->request_type)
1288 {
1289 case ASOK_REQ_VERSION:
1290 io->state = CSTATE_READ_VERSION;
1291 break;
1292 default:
1293 io->state = CSTATE_READ_AMT;
1294 break;
1295 }
1296 }
1297 return 0;
1298 }
1299 case CSTATE_READ_VERSION:
1300 {
1301 RETRY_ON_EINTR(ret,
1302 read(io->asok, ((char*)(&io->d->version)) + io->amt,
1303 sizeof(io->d->version) - io->amt));
1304 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1305 io->d->name, io->state, ret);
1306 if(ret < 0)
1307 {
1308 return ret;
1309 }
1310 io->amt += ret;
1311 if(io->amt >= sizeof(io->d->version))
1312 {
1313 io->d->version = ntohl(io->d->version);
1314 if(io->d->version != 1)
1315 {
1316 ERROR("ceph plugin: cconn_handle_event(name=%s) not "
1317 "expecting version %d!", io->d->name, io->d->version);
1318 return -ENOTSUP;
1319 }
1320 DEBUG("ceph plugin: cconn_handle_event(name=%s): identified as "
1321 "version %d", io->d->name, io->d->version);
1322 io->amt = 0;
1323 cconn_close(io);
1324 io->request_type = ASOK_REQ_SCHEMA;
1325 }
1326 return 0;
1327 }
1328 case CSTATE_READ_AMT:
1329 {
1330 RETRY_ON_EINTR(ret,
1331 read(io->asok, ((char*)(&io->json_len)) + io->amt,
1332 sizeof(io->json_len) - io->amt));
1333 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1334 io->d->name, io->state, ret);
1335 if(ret < 0)
1336 {
1337 return ret;
1338 }
1339 io->amt += ret;
1340 if(io->amt >= sizeof(io->json_len))
1341 {
1342 io->json_len = ntohl(io->json_len);
1343 io->amt = 0;
1344 io->state = CSTATE_READ_JSON;
1345 io->json = calloc(1, io->json_len + 1);
1346 if(!io->json)
1347 {
1348 ERROR("ceph plugin: error callocing io->json");
1349 return -ENOMEM;
1350 }
1351 }
1352 return 0;
1353 }
1354 case CSTATE_READ_JSON:
1355 {
1356 RETRY_ON_EINTR(ret,
1357 read(io->asok, io->json + io->amt, io->json_len - io->amt));
1358 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1359 io->d->name, io->state, ret);
1360 if(ret < 0)
1361 {
1362 return ret;
1363 }
1364 io->amt += ret;
1365 if(io->amt >= io->json_len)
1366 {
1367 ret = cconn_process_json(io);
1368 if(ret)
1369 {
1370 return ret;
1371 }
1372 cconn_close(io);
1373 io->request_type = ASOK_REQ_NONE;
1374 }
1375 return 0;
1376 }
1377 default:
1378 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1379 "state on line %d", io->d->name, __LINE__);
1380 return -EDOM;
1381 }
1382 }
1384 static int cconn_prepare(struct cconn *io, struct pollfd* fds)
1385 {
1386 int ret;
1387 if(io->request_type == ASOK_REQ_NONE)
1388 {
1389 /* The request has already been serviced. */
1390 return 0;
1391 }
1392 else if((io->request_type == ASOK_REQ_DATA) && (io->d->ds_num == 0))
1393 {
1394 /* If there are no counters to report on, don't bother
1395 * connecting */
1396 return 0;
1397 }
1399 switch (io->state)
1400 {
1401 case CSTATE_UNCONNECTED:
1402 ret = cconn_connect(io);
1403 if(ret > 0)
1404 {
1405 return -ret;
1406 }
1407 else if(ret < 0)
1408 {
1409 return ret;
1410 }
1411 fds->fd = io->asok;
1412 fds->events = POLLOUT;
1413 return 1;
1414 case CSTATE_WRITE_REQUEST:
1415 fds->fd = io->asok;
1416 fds->events = POLLOUT;
1417 return 1;
1418 case CSTATE_READ_VERSION:
1419 case CSTATE_READ_AMT:
1420 case CSTATE_READ_JSON:
1421 fds->fd = io->asok;
1422 fds->events = POLLIN;
1423 return 1;
1424 default:
1425 ERROR("ceph plugin: cconn_prepare(name=%s) got to illegal state "
1426 "on line %d", io->d->name, __LINE__);
1427 return -EDOM;
1428 }
1429 }
1431 /** Returns the difference between two struct timevals in milliseconds.
1432 * On overflow, we return max/min int.
1433 */
1434 static int milli_diff(const struct timeval *t1, const struct timeval *t2)
1435 {
1436 int64_t ret;
1437 int sec_diff = t1->tv_sec - t2->tv_sec;
1438 int usec_diff = t1->tv_usec - t2->tv_usec;
1439 ret = usec_diff / 1000;
1440 ret += (sec_diff * 1000);
1441 return (ret > INT_MAX) ? INT_MAX : ((ret < INT_MIN) ? INT_MIN : (int)ret);
1442 }
1444 /** This handles the actual network I/O to talk to the Ceph daemons.
1445 */
1446 static int cconn_main_loop(uint32_t request_type)
1447 {
1448 int i, ret, some_unreachable = 0;
1449 struct timeval end_tv;
1450 struct cconn io_array[g_num_daemons];
1452 DEBUG("ceph plugin: entering cconn_main_loop(request_type = %d)", request_type);
1454 /* create cconn array */
1455 memset(io_array, 0, sizeof(io_array));
1456 for(i = 0; i < g_num_daemons; ++i)
1457 {
1458 io_array[i].d = g_daemons[i];
1459 io_array[i].request_type = request_type;
1460 io_array[i].state = CSTATE_UNCONNECTED;
1461 }
1463 /** Calculate the time at which we should give up */
1464 gettimeofday(&end_tv, NULL);
1465 end_tv.tv_sec += CEPH_TIMEOUT_INTERVAL;
1467 while (1)
1468 {
1469 int nfds, diff;
1470 struct timeval tv;
1471 struct cconn *polled_io_array[g_num_daemons];
1472 struct pollfd fds[g_num_daemons];
1473 memset(fds, 0, sizeof(fds));
1474 nfds = 0;
1475 for(i = 0; i < g_num_daemons; ++i)
1476 {
1477 struct cconn *io = io_array + i;
1478 ret = cconn_prepare(io, fds + nfds);
1479 if(ret < 0)
1480 {
1481 WARNING("ceph plugin: cconn_prepare(name=%s,i=%d,st=%d)=%d",
1482 io->d->name, i, io->state, ret);
1483 cconn_close(io);
1484 io->request_type = ASOK_REQ_NONE;
1485 some_unreachable = 1;
1486 }
1487 else if(ret == 1)
1488 {
1489 polled_io_array[nfds++] = io_array + i;
1490 }
1491 }
1492 if(nfds == 0)
1493 {
1494 /* finished */
1495 ret = 0;
1496 goto done;
1497 }
1498 gettimeofday(&tv, NULL);
1499 diff = milli_diff(&end_tv, &tv);
1500 if(diff <= 0)
1501 {
1502 /* Timed out */
1503 ret = -ETIMEDOUT;
1504 WARNING("ceph plugin: cconn_main_loop: timed out.");
1505 goto done;
1506 }
1507 RETRY_ON_EINTR(ret, poll(fds, nfds, diff));
1508 if(ret < 0)
1509 {
1510 ERROR("ceph plugin: poll(2) error: %d", ret);
1511 goto done;
1512 }
1513 for(i = 0; i < nfds; ++i)
1514 {
1515 struct cconn *io = polled_io_array[i];
1516 int revents = fds[i].revents;
1517 if(revents == 0)
1518 {
1519 /* do nothing */
1520 }
1521 else if(cconn_validate_revents(io, revents))
1522 {
1523 WARNING("ceph plugin: cconn(name=%s,i=%d,st=%d): "
1524 "revents validation error: "
1525 "revents=0x%08x", io->d->name, i, io->state, revents);
1526 cconn_close(io);
1527 io->request_type = ASOK_REQ_NONE;
1528 some_unreachable = 1;
1529 }
1530 else
1531 {
1532 int ret = cconn_handle_event(io);
1533 if(ret)
1534 {
1535 WARNING("ceph plugin: cconn_handle_event(name=%s,"
1536 "i=%d,st=%d): error %d", io->d->name, i, io->state, ret);
1537 cconn_close(io);
1538 io->request_type = ASOK_REQ_NONE;
1539 some_unreachable = 1;
1540 }
1541 }
1542 }
1543 }
1544 done: for(i = 0; i < g_num_daemons; ++i)
1545 {
1546 cconn_close(io_array + i);
1547 }
1548 if(some_unreachable)
1549 {
1550 DEBUG("ceph plugin: cconn_main_loop: some Ceph daemons were unreachable.");
1551 }
1552 else
1553 {
1554 DEBUG("ceph plugin: cconn_main_loop: reached all Ceph daemons :)");
1555 }
1556 return ret;
1557 }
1559 static int ceph_read(void)
1560 {
1561 return cconn_main_loop(ASOK_REQ_DATA);
1562 }
1564 /******* lifecycle *******/
1565 static int ceph_init(void)
1566 {
1567 int ret;
1568 ceph_daemons_print();
1570 ret = cconn_main_loop(ASOK_REQ_VERSION);
1572 return (ret) ? ret : 0;
1573 }
1575 static int ceph_shutdown(void)
1576 {
1577 int i;
1578 for(i = 0; i < g_num_daemons; ++i)
1579 {
1580 ceph_daemon_free(g_daemons[i]);
1581 }
1582 sfree(g_daemons);
1583 g_daemons = NULL;
1584 g_num_daemons = 0;
1585 DEBUG("ceph plugin: finished ceph_shutdown");
1586 return 0;
1587 }
1589 void module_register(void)
1590 {
1591 plugin_register_complex_config("ceph", ceph_config);
1592 plugin_register_init("ceph", ceph_init);
1593 plugin_register_read("ceph", ceph_read);
1594 plugin_register_shutdown("ceph", ceph_shutdown);
1595 }
1596 /* vim: set sw=4 sts=4 et : */