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/time.h>
49 #include <sys/types.h>
50 #include <sys/un.h>
51 #include <unistd.h>
52 #include <math.h>
53 #include <inttypes.h>
55 #define RETRY_AVGCOUNT -1
57 #if defined(YAJL_MAJOR) && (YAJL_MAJOR > 1)
58 # define HAVE_YAJL_V2 1
59 #endif
61 #define RETRY_ON_EINTR(ret, expr) \
62 while(1) { \
63 ret = expr; \
64 if(ret >= 0) \
65 break; \
66 ret = -errno; \
67 if(ret != -EINTR) \
68 break; \
69 }
71 /** Timeout interval in seconds */
72 #define CEPH_TIMEOUT_INTERVAL 1
74 /** Maximum path length for a UNIX domain socket on this system */
75 #define UNIX_DOMAIN_SOCK_PATH_MAX (sizeof(((struct sockaddr_un*)0)->sun_path))
77 /** Yajl callback returns */
78 #define CEPH_CB_CONTINUE 1
79 #define CEPH_CB_ABORT 0
81 #if HAVE_YAJL_V2
82 typedef size_t yajl_len_t;
83 #else
84 typedef unsigned int yajl_len_t;
85 #endif
87 /** Number of types for ceph defined in types.db */
88 #define CEPH_DSET_TYPES_NUM 3
89 /** ceph types enum */
90 enum ceph_dset_type_d
91 {
92 DSET_LATENCY = 0,
93 DSET_BYTES = 1,
94 DSET_RATE = 2,
95 DSET_TYPE_UNFOUND = 1000
96 };
98 /** Valid types for ceph defined in types.db */
99 static const char * const ceph_dset_types [CEPH_DSET_TYPES_NUM] =
100 {"ceph_latency", "ceph_bytes", "ceph_rate"};
102 /******* ceph_daemon *******/
103 struct ceph_daemon
104 {
105 /** Version of the admin_socket interface */
106 uint32_t version;
107 /** daemon name **/
108 char name[DATA_MAX_NAME_LEN];
110 /** Path to the socket that we use to talk to the ceph daemon */
111 char asok_path[UNIX_DOMAIN_SOCK_PATH_MAX];
113 /** Number of counters */
114 int ds_num;
115 /** Track ds types */
116 uint32_t *ds_types;
117 /** Track ds names to match with types */
118 char **ds_names;
120 /**
121 * Keep track of last data for latency values so we can calculate rate
122 * since last poll.
123 */
124 struct last_data **last_poll_data;
125 /** index of last poll data */
126 int last_idx;
127 };
129 /******* JSON parsing *******/
130 typedef int (*node_handler_t)(void *, const char*, const char*);
132 /** Track state and handler while parsing JSON */
133 struct yajl_struct
134 {
135 node_handler_t handler;
136 void * handler_arg;
138 char *key;
139 char *stack[YAJL_MAX_DEPTH];
140 size_t depth;
141 };
142 typedef struct yajl_struct yajl_struct;
144 enum perfcounter_type_d
145 {
146 PERFCOUNTER_LATENCY = 0x4, PERFCOUNTER_DERIVE = 0x8,
147 };
149 /** Give user option to use default (long run = since daemon started) avg */
150 static int long_run_latency_avg = 0;
152 /**
153 * Give user option to use default type for special cases -
154 * filestore.journal_wr_bytes is currently only metric here. Ceph reports the
155 * type as a sum/count pair and will calculate it the same as a latency value.
156 * All other "bytes" metrics (excluding the used/capacity bytes for the OSD)
157 * use the DERIVE type. Unless user specifies to use given type, convert this
158 * metric to use DERIVE.
159 */
160 static int convert_special_metrics = 1;
162 /** Array of daemons to monitor */
163 static struct ceph_daemon **g_daemons = NULL;
165 /** Number of elements in g_daemons */
166 static int g_num_daemons = 0;
168 /**
169 * A set of data that we build up in memory while parsing the JSON.
170 */
171 struct values_tmp
172 {
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 /** do we already have an avgcount for latency pair */
180 int avgcount_exists;
181 /**
182 * similar to index, but current index of latency type counters -
183 * used to get last poll data of counter
184 */
185 int latency_index;
186 /**
187 * values list - maintain across counters since
188 * host/plugin/plugin instance are always the same
189 */
190 value_list_t vlist;
191 };
193 /**
194 * A set of count/sum pairs to keep track of latency types and get difference
195 * between this poll data and last poll data.
196 */
197 struct last_data
198 {
199 char ds_name[DATA_MAX_NAME_LEN];
200 double last_sum;
201 uint64_t last_count;
202 };
204 /******* network I/O *******/
205 enum cstate_t
206 {
207 CSTATE_UNCONNECTED = 0,
208 CSTATE_WRITE_REQUEST,
209 CSTATE_READ_VERSION,
210 CSTATE_READ_AMT,
211 CSTATE_READ_JSON,
212 };
214 enum request_type_t
215 {
216 ASOK_REQ_VERSION = 0,
217 ASOK_REQ_DATA = 1,
218 ASOK_REQ_SCHEMA = 2,
219 ASOK_REQ_NONE = 1000,
220 };
222 struct cconn
223 {
224 /** The Ceph daemon that we're talking to */
225 struct ceph_daemon *d;
227 /** Request type */
228 uint32_t request_type;
230 /** The connection state */
231 enum cstate_t state;
233 /** The socket we use to talk to this daemon */
234 int asok;
236 /** The amount of data remaining to read / write. */
237 uint32_t amt;
239 /** Length of the JSON to read */
240 uint32_t json_len;
242 /** Buffer containing JSON data */
243 unsigned char *json;
245 /** Keep data important to yajl processing */
246 struct yajl_struct yajl;
247 };
249 static int ceph_cb_null(void *ctx)
250 {
251 return CEPH_CB_CONTINUE;
252 }
254 static int ceph_cb_boolean(void *ctx, int bool_val)
255 {
256 return CEPH_CB_CONTINUE;
257 }
259 #define BUFFER_ADD(dest, src) do { \
260 size_t dest_size = sizeof (dest); \
261 strncat ((dest), (src), dest_size - strlen (dest)); \
262 (dest)[dest_size - 1] = '\0'; \
263 } while (0)
265 static int
266 ceph_cb_number(void *ctx, const char *number_val, yajl_len_t number_len)
267 {
268 yajl_struct *state = (yajl_struct*) ctx;
269 char buffer[number_len+1];
270 char key[2 * DATA_MAX_NAME_LEN];
271 _Bool latency_type = 0;
272 size_t i;
273 int status;
275 key[0] = '\0';
276 memcpy(buffer, number_val, number_len);
277 buffer[sizeof(buffer) - 1] = '\0';
279 for (i = 0; i < state->depth; i++)
280 {
281 if (state->stack[i] == NULL)
282 continue;
284 if (strlen (key) != 0)
285 BUFFER_ADD (key, ".");
286 BUFFER_ADD (key, state->stack[i]);
287 }
289 /* Special case for latency metrics. */
290 if ((strcmp ("avgcount", state->key) == 0)
291 || (strcmp ("sum", state->key) == 0))
292 {
293 latency_type = 1;
295 /* Super-special case for filestore.journal_wr_bytes.avgcount: For
296 * some reason, Ceph schema encodes this as a count/sum pair while all
297 * other "Bytes" data (excluding used/capacity bytes for OSD space) uses
298 * a single "Derive" type. To spare further confusion, keep this KPI as
299 * the same type of other "Bytes". Instead of keeping an "average" or
300 * "rate", use the "sum" in the pair and assign that to the derive
301 * value. */
302 if (convert_special_metrics && (state->depth >= 2)
303 && (strcmp("filestore", state->stack[state->depth - 2]) == 0)
304 && (strcmp("journal_wr_bytes", state->stack[state->depth - 1]) == 0)
305 && (strcmp("avgcount", state->key) == 0))
306 {
307 DEBUG("ceph plugin: Skipping avgcount for filestore.JournalWrBytes");
308 return CEPH_CB_CONTINUE;
309 }
310 }
311 else /* not a latency type */
312 {
313 BUFFER_ADD (key, ".");
314 BUFFER_ADD (key, state->key);
315 }
317 status = state->handler(state->handler_arg, buffer, key);
318 if((status == RETRY_AVGCOUNT) && latency_type)
319 {
320 /* Add previously skipped part of the key, either "avgcount" or "sum",
321 * and try again. */
322 BUFFER_ADD (key, ".");
323 BUFFER_ADD (key, state->key);
325 status = state->handler(state->handler_arg, buffer, key);
326 }
328 if (status != 0)
329 {
330 ERROR("ceph plugin: JSON handler failed with status %d.", status);
331 return CEPH_CB_ABORT;
332 }
334 return CEPH_CB_CONTINUE;
335 }
337 static int ceph_cb_string(void *ctx, const unsigned char *string_val,
338 yajl_len_t string_len)
339 {
340 return CEPH_CB_CONTINUE;
341 }
343 static int ceph_cb_start_map(void *ctx)
344 {
345 yajl_struct *state = (yajl_struct*) ctx;
347 /* Push key to the stack */
348 if (state->depth == YAJL_MAX_DEPTH)
349 return CEPH_CB_ABORT;
351 state->stack[state->depth] = state->key;
352 state->depth++;
353 state->key = NULL;
355 return CEPH_CB_CONTINUE;
356 }
358 static int ceph_cb_end_map(void *ctx)
359 {
360 yajl_struct *state = (yajl_struct*) ctx;
362 /* Pop key from the stack */
363 if (state->depth == 0)
364 return CEPH_CB_ABORT;
366 sfree (state->key);
367 state->depth--;
368 state->key = state->stack[state->depth];
369 state->stack[state->depth] = NULL;
371 return CEPH_CB_CONTINUE;
372 }
374 static int
375 ceph_cb_map_key(void *ctx, const unsigned char *key, yajl_len_t string_len)
376 {
377 yajl_struct *state = (yajl_struct*) ctx;
378 size_t sz = ((size_t) string_len) + 1;
380 sfree (state->key);
381 state->key = malloc (sz);
382 if (state->key == NULL)
383 {
384 ERROR ("ceph plugin: malloc failed.");
385 return CEPH_CB_ABORT;
386 }
388 memmove (state->key, key, sz - 1);
389 state->key[sz - 1] = 0;
391 return CEPH_CB_CONTINUE;
392 }
394 static int ceph_cb_start_array(void *ctx)
395 {
396 return CEPH_CB_CONTINUE;
397 }
399 static int ceph_cb_end_array(void *ctx)
400 {
401 return CEPH_CB_CONTINUE;
402 }
404 static yajl_callbacks callbacks = {
405 ceph_cb_null,
406 ceph_cb_boolean,
407 NULL,
408 NULL,
409 ceph_cb_number,
410 ceph_cb_string,
411 ceph_cb_start_map,
412 ceph_cb_map_key,
413 ceph_cb_end_map,
414 ceph_cb_start_array,
415 ceph_cb_end_array
416 };
418 static void ceph_daemon_print(const struct ceph_daemon *d)
419 {
420 DEBUG("ceph plugin: name=%s, asok_path=%s", d->name, d->asok_path);
421 }
423 static void ceph_daemons_print(void)
424 {
425 int i;
426 for(i = 0; i < g_num_daemons; ++i)
427 {
428 ceph_daemon_print(g_daemons[i]);
429 }
430 }
432 static void ceph_daemon_free(struct ceph_daemon *d)
433 {
434 int i = 0;
435 for(; i < d->last_idx; i++)
436 {
437 sfree(d->last_poll_data[i]);
438 }
439 sfree(d->last_poll_data);
440 d->last_poll_data = NULL;
441 d->last_idx = 0;
442 for(i = 0; i < d->ds_num; i++)
443 {
444 sfree(d->ds_names[i]);
445 }
446 sfree(d->ds_types);
447 sfree(d->ds_names);
448 sfree(d);
449 }
451 /* compact_ds_name removed the special characters ":", "_", "-" and "+" from the
452 * intput string. Characters following these special characters are capitalized.
453 * Trailing "+" and "-" characters are replaces with the strings "Plus" and
454 * "Minus". */
455 static int compact_ds_name (char *buffer, size_t buffer_size, char const *src)
456 {
457 char *src_copy;
458 size_t src_len;
459 char *ptr = buffer;
460 size_t ptr_size = buffer_size;
461 _Bool append_plus = 0;
462 _Bool append_minus = 0;
464 if ((buffer == NULL) || (buffer_size <= strlen ("Minus")) || (src == NULL))
465 return EINVAL;
467 src_copy = strdup (src);
468 src_len = strlen(src);
470 /* Remove trailing "+" and "-". */
471 if (src_copy[src_len - 1] == '+')
472 {
473 append_plus = 1;
474 src_len--;
475 src_copy[src_len] = 0;
476 }
477 else if (src_copy[src_len - 1] == '-')
478 {
479 append_minus = 1;
480 src_len--;
481 src_copy[src_len] = 0;
482 }
484 /* Split at special chars, capitalize first character, append to buffer. */
485 char *dummy = src_copy;
486 char *token;
487 char *save_ptr = NULL;
488 while ((token = strtok_r (dummy, ":_-+", &save_ptr)) != NULL)
489 {
490 size_t len;
492 dummy = NULL;
494 token[0] = toupper ((int) token[0]);
496 assert (ptr_size > 1);
498 len = strlen (token);
499 if (len >= ptr_size)
500 len = ptr_size - 1;
502 assert (len > 0);
503 assert (len < ptr_size);
505 sstrncpy (ptr, token, len + 1);
506 ptr += len;
507 ptr_size -= len;
509 assert (*ptr == 0);
510 if (ptr_size <= 1)
511 break;
512 }
514 /* Append "Plus" or "Minus" if "+" or "-" has been stripped above. */
515 if (append_plus || append_minus)
516 {
517 char const *append = "Plus";
518 if (append_minus)
519 append = "Minus";
521 size_t offset = buffer_size - (strlen (append) + 1);
522 if (offset > strlen (buffer))
523 offset = strlen (buffer);
525 sstrncpy (buffer + offset, append, buffer_size - offset);
526 }
528 sfree (src_copy);
529 return 0;
530 }
532 static _Bool has_suffix (char const *str, char const *suffix)
533 {
534 size_t str_len = strlen (str);
535 size_t suffix_len = strlen (suffix);
536 size_t offset;
538 if (suffix_len > str_len)
539 return 0;
540 offset = str_len - suffix_len;
542 if (strcmp (str + offset, suffix) == 0)
543 return 1;
545 return 0;
546 }
548 /* count_parts returns the number of elements a "foo.bar.baz" style key has. */
549 static size_t count_parts (char const *key)
550 {
551 char const *ptr;
552 size_t parts_num = 0;
554 for (ptr = key; ptr != NULL; ptr = strchr (ptr + 1, '.'))
555 parts_num++;
557 return parts_num;
558 }
560 /**
561 * Parse key to remove "type" if this is for schema and initiate compaction
562 */
563 static int parse_keys (char *buffer, size_t buffer_size, const char *key_str)
564 {
565 char tmp[2 * buffer_size];
567 if (buffer == NULL || buffer_size == 0 || key_str == NULL || strlen (key_str) == 0)
568 return EINVAL;
570 if ((count_parts (key_str) > 2) && has_suffix (key_str, ".type"))
571 {
572 /* strip ".type" suffix iff the key has more than two parts. */
573 size_t sz = strlen (key_str) - strlen (".type") + 1;
575 if (sz > sizeof (tmp))
576 sz = sizeof (tmp);
577 sstrncpy (tmp, key_str, sz);
578 }
579 else
580 {
581 sstrncpy (tmp, key_str, sizeof (tmp));
582 }
584 return compact_ds_name (buffer, buffer_size, tmp);
585 }
587 /**
588 * while parsing ceph admin socket schema, save counter name and type for later
589 * data processing
590 */
591 static int ceph_daemon_add_ds_entry(struct ceph_daemon *d, const char *name,
592 int pc_type)
593 {
594 uint32_t type;
595 char ds_name[DATA_MAX_NAME_LEN];
597 if(convert_special_metrics)
598 {
599 /**
600 * Special case for filestore:JournalWrBytes. For some reason, Ceph
601 * schema encodes this as a count/sum pair while all other "Bytes" data
602 * (excluding used/capacity bytes for OSD space) uses a single "Derive"
603 * type. To spare further confusion, keep this KPI as the same type of
604 * other "Bytes". Instead of keeping an "average" or "rate", use the
605 * "sum" in the pair and assign that to the derive value.
606 */
607 if((strcmp(name,"filestore.journal_wr_bytes.type") == 0))
608 {
609 pc_type = 10;
610 }
611 }
613 d->ds_names = realloc(d->ds_names, sizeof(char *) * (d->ds_num + 1));
614 if(!d->ds_names)
615 {
616 return -ENOMEM;
617 }
619 d->ds_types = realloc(d->ds_types, sizeof(uint32_t) * (d->ds_num + 1));
620 if(!d->ds_types)
621 {
622 return -ENOMEM;
623 }
625 d->ds_names[d->ds_num] = malloc(DATA_MAX_NAME_LEN);
626 if(!d->ds_names[d->ds_num])
627 {
628 return -ENOMEM;
629 }
631 type = (pc_type & PERFCOUNTER_DERIVE) ? DSET_RATE :
632 ((pc_type & PERFCOUNTER_LATENCY) ? DSET_LATENCY : DSET_BYTES);
633 d->ds_types[d->ds_num] = type;
635 if (parse_keys(ds_name, sizeof (ds_name), name))
636 {
637 return 1;
638 }
640 sstrncpy(d->ds_names[d->ds_num], ds_name, DATA_MAX_NAME_LEN -1);
641 d->ds_num = (d->ds_num + 1);
643 return 0;
644 }
646 /******* ceph_config *******/
647 static int cc_handle_str(struct oconfig_item_s *item, char *dest, int dest_len)
648 {
649 const char *val;
650 if(item->values_num != 1)
651 {
652 return -ENOTSUP;
653 }
654 if(item->values[0].type != OCONFIG_TYPE_STRING)
655 {
656 return -ENOTSUP;
657 }
658 val = item->values[0].value.string;
659 if(snprintf(dest, dest_len, "%s", val) > (dest_len - 1))
660 {
661 ERROR("ceph plugin: configuration parameter '%s' is too long.\n",
662 item->key);
663 return -ENAMETOOLONG;
664 }
665 return 0;
666 }
668 static int cc_handle_bool(struct oconfig_item_s *item, int *dest)
669 {
670 if(item->values_num != 1)
671 {
672 return -ENOTSUP;
673 }
675 if(item->values[0].type != OCONFIG_TYPE_BOOLEAN)
676 {
677 return -ENOTSUP;
678 }
680 *dest = (item->values[0].value.boolean) ? 1 : 0;
681 return 0;
682 }
684 static int cc_add_daemon_config(oconfig_item_t *ci)
685 {
686 int ret, i;
687 struct ceph_daemon *nd, cd = { 0 };
688 struct ceph_daemon **tmp;
690 if((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
691 {
692 WARNING("ceph plugin: `Daemon' blocks need exactly one string "
693 "argument.");
694 return (-1);
695 }
697 ret = cc_handle_str(ci, cd.name, DATA_MAX_NAME_LEN);
698 if(ret)
699 {
700 return ret;
701 }
703 for(i=0; i < ci->children_num; i++)
704 {
705 oconfig_item_t *child = ci->children + i;
707 if(strcasecmp("SocketPath", child->key) == 0)
708 {
709 ret = cc_handle_str(child, cd.asok_path, sizeof(cd.asok_path));
710 if(ret)
711 {
712 return ret;
713 }
714 }
715 else
716 {
717 WARNING("ceph plugin: ignoring unknown option %s", child->key);
718 }
719 }
720 if(cd.name[0] == '\0')
721 {
722 ERROR("ceph plugin: you must configure a daemon name.\n");
723 return -EINVAL;
724 }
725 else if(cd.asok_path[0] == '\0')
726 {
727 ERROR("ceph plugin(name=%s): you must configure an administrative "
728 "socket path.\n", cd.name);
729 return -EINVAL;
730 }
731 else if(!((cd.asok_path[0] == '/') ||
732 (cd.asok_path[0] == '.' && cd.asok_path[1] == '/')))
733 {
734 ERROR("ceph plugin(name=%s): administrative socket paths must begin "
735 "with '/' or './' Can't parse: '%s'\n", cd.name, cd.asok_path);
736 return -EINVAL;
737 }
739 tmp = realloc(g_daemons, (g_num_daemons+1) * sizeof(*g_daemons));
740 if(tmp == NULL)
741 {
742 /* The positive return value here indicates that this is a
743 * runtime error, not a configuration error. */
744 return ENOMEM;
745 }
746 g_daemons = tmp;
748 nd = malloc(sizeof (*nd));
749 if(!nd)
750 {
751 return ENOMEM;
752 }
753 memcpy(nd, &cd, sizeof(*nd));
754 g_daemons[g_num_daemons++] = nd;
755 return 0;
756 }
758 static int ceph_config(oconfig_item_t *ci)
759 {
760 int ret, i;
762 for(i = 0; i < ci->children_num; ++i)
763 {
764 oconfig_item_t *child = ci->children + i;
765 if(strcasecmp("Daemon", child->key) == 0)
766 {
767 ret = cc_add_daemon_config(child);
768 if(ret == ENOMEM)
769 {
770 ERROR("ceph plugin: Couldn't allocate memory");
771 return ret;
772 }
773 else if(ret)
774 {
775 //process other daemons and ignore this one
776 continue;
777 }
778 }
779 else if(strcasecmp("LongRunAvgLatency", child->key) == 0)
780 {
781 ret = cc_handle_bool(child, &long_run_latency_avg);
782 if(ret)
783 {
784 return ret;
785 }
786 }
787 else if(strcasecmp("ConvertSpecialMetricTypes", child->key) == 0)
788 {
789 ret = cc_handle_bool(child, &convert_special_metrics);
790 if(ret)
791 {
792 return ret;
793 }
794 }
795 else
796 {
797 WARNING("ceph plugin: ignoring unknown option %s", child->key);
798 }
799 }
800 return 0;
801 }
803 /**
804 * Parse JSON and get error message if present
805 */
806 static int
807 traverse_json(const unsigned char *json, uint32_t json_len, yajl_handle hand)
808 {
809 yajl_status status = yajl_parse(hand, json, json_len);
810 unsigned char *msg;
812 switch(status)
813 {
814 case yajl_status_error:
815 msg = yajl_get_error(hand, /* verbose = */ 1,
816 /* jsonText = */ (unsigned char *) json,
817 (unsigned int) json_len);
818 ERROR ("ceph plugin: yajl_parse failed: %s", msg);
819 yajl_free_error(hand, msg);
820 return 1;
821 case yajl_status_client_canceled:
822 return 1;
823 default:
824 return 0;
825 }
826 }
828 /**
829 * Add entry for each counter while parsing schema
830 */
831 static int
832 node_handler_define_schema(void *arg, const char *val, const char *key)
833 {
834 struct ceph_daemon *d = (struct ceph_daemon *) arg;
835 int pc_type;
836 pc_type = atoi(val);
837 return ceph_daemon_add_ds_entry(d, key, pc_type);
838 }
840 /**
841 * Latency counter does not yet have an entry in last poll data - add it.
842 */
843 static int add_last(struct ceph_daemon *d, const char *ds_n, double cur_sum,
844 uint64_t cur_count)
845 {
846 d->last_poll_data[d->last_idx] = malloc(sizeof (*d->last_poll_data[d->last_idx]));
847 if(!d->last_poll_data[d->last_idx])
848 {
849 return -ENOMEM;
850 }
851 sstrncpy(d->last_poll_data[d->last_idx]->ds_name,ds_n,
852 sizeof(d->last_poll_data[d->last_idx]->ds_name));
853 d->last_poll_data[d->last_idx]->last_sum = cur_sum;
854 d->last_poll_data[d->last_idx]->last_count = cur_count;
855 d->last_idx = (d->last_idx + 1);
856 return 0;
857 }
859 /**
860 * Update latency counter or add new entry if it doesn't exist
861 */
862 static int update_last(struct ceph_daemon *d, const char *ds_n, int index,
863 double cur_sum, uint64_t cur_count)
864 {
865 if((d->last_idx > index) && (strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0))
866 {
867 d->last_poll_data[index]->last_sum = cur_sum;
868 d->last_poll_data[index]->last_count = cur_count;
869 return 0;
870 }
872 if(!d->last_poll_data)
873 {
874 d->last_poll_data = malloc(sizeof (*d->last_poll_data));
875 if(!d->last_poll_data)
876 {
877 return -ENOMEM;
878 }
879 }
880 else
881 {
882 struct last_data **tmp_last = realloc(d->last_poll_data,
883 ((d->last_idx+1) * sizeof(struct last_data *)));
884 if(!tmp_last)
885 {
886 return -ENOMEM;
887 }
888 d->last_poll_data = tmp_last;
889 }
890 return add_last(d, ds_n, cur_sum, cur_count);
891 }
893 /**
894 * If using index guess failed (shouldn't happen, but possible if counters
895 * get rearranged), resort to searching for counter name
896 */
897 static int backup_search_for_last_avg(struct ceph_daemon *d, const char *ds_n)
898 {
899 int i = 0;
900 for(; i < d->last_idx; i++)
901 {
902 if(strcmp(d->last_poll_data[i]->ds_name, ds_n) == 0)
903 {
904 return i;
905 }
906 }
907 return -1;
908 }
910 /**
911 * Calculate average b/t current data and last poll data
912 * if last poll data exists
913 */
914 static double get_last_avg(struct ceph_daemon *d, const char *ds_n, int index,
915 double cur_sum, uint64_t cur_count)
916 {
917 double result = -1.1, sum_delt = 0.0;
918 uint64_t count_delt = 0;
919 int tmp_index = 0;
920 if(d->last_idx > index)
921 {
922 if(strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0)
923 {
924 tmp_index = index;
925 }
926 //test previous index
927 else if((index > 0) && (strcmp(d->last_poll_data[index-1]->ds_name, ds_n) == 0))
928 {
929 tmp_index = (index - 1);
930 }
931 else
932 {
933 tmp_index = backup_search_for_last_avg(d, ds_n);
934 }
936 if((tmp_index > -1) && (cur_count > d->last_poll_data[tmp_index]->last_count))
937 {
938 sum_delt = (cur_sum - d->last_poll_data[tmp_index]->last_sum);
939 count_delt = (cur_count - d->last_poll_data[tmp_index]->last_count);
940 result = (sum_delt / count_delt);
941 }
942 }
944 if(result == -1.1)
945 {
946 result = NAN;
947 }
948 if(update_last(d, ds_n, tmp_index, cur_sum, cur_count) == -ENOMEM)
949 {
950 return -ENOMEM;
951 }
952 return result;
953 }
955 /**
956 * If using index guess failed, resort to searching for counter name
957 */
958 static uint32_t backup_search_for_type(struct ceph_daemon *d, char *ds_name)
959 {
960 int idx = 0;
961 for(; idx < d->ds_num; idx++)
962 {
963 if(strcmp(d->ds_names[idx], ds_name) == 0)
964 {
965 return d->ds_types[idx];
966 }
967 }
968 return DSET_TYPE_UNFOUND;
969 }
971 /**
972 * Process counter data and dispatch values
973 */
974 static int node_handler_fetch_data(void *arg, const char *val, const char *key)
975 {
976 value_t uv;
977 double tmp_d;
978 uint64_t tmp_u;
979 struct values_tmp *vtmp = (struct values_tmp*) arg;
980 uint32_t type = DSET_TYPE_UNFOUND;
981 int index = vtmp->index;
983 char ds_name[DATA_MAX_NAME_LEN];
985 if (parse_keys (ds_name, sizeof (ds_name), key))
986 {
987 return 1;
988 }
990 if(index >= vtmp->d->ds_num)
991 {
992 //don't overflow bounds of array
993 index = (vtmp->d->ds_num - 1);
994 }
996 /**
997 * counters should remain in same order we parsed schema... we maintain the
998 * index variable to keep track of current point in list of counters. first
999 * use index to guess point in array for retrieving type. if that doesn't
1000 * work, use the old way to get the counter type
1001 */
1002 if(strcmp(ds_name, vtmp->d->ds_names[index]) == 0)
1003 {
1004 //found match
1005 type = vtmp->d->ds_types[index];
1006 }
1007 else if((index > 0) && (strcmp(ds_name, vtmp->d->ds_names[index-1]) == 0))
1008 {
1009 //try previous key
1010 type = vtmp->d->ds_types[index-1];
1011 }
1013 if(type == DSET_TYPE_UNFOUND)
1014 {
1015 //couldn't find right type by guessing, check the old way
1016 type = backup_search_for_type(vtmp->d, ds_name);
1017 }
1019 switch(type)
1020 {
1021 case DSET_LATENCY:
1022 if(vtmp->avgcount_exists == -1)
1023 {
1024 sscanf(val, "%" PRIu64, &vtmp->avgcount);
1025 vtmp->avgcount_exists = 0;
1026 //return after saving avgcount - don't dispatch value
1027 //until latency calculation
1028 return 0;
1029 }
1030 else
1031 {
1032 double sum, result;
1033 sscanf(val, "%lf", &sum);
1035 if(vtmp->avgcount == 0)
1036 {
1037 vtmp->avgcount = 1;
1038 }
1040 /** User wants latency values as long run avg */
1041 if(long_run_latency_avg)
1042 {
1043 result = (sum / vtmp->avgcount);
1044 }
1045 else
1046 {
1047 result = get_last_avg(vtmp->d, ds_name, vtmp->latency_index, sum, vtmp->avgcount);
1048 if(result == -ENOMEM)
1049 {
1050 return -ENOMEM;
1051 }
1052 }
1054 uv.gauge = result;
1055 vtmp->avgcount_exists = -1;
1056 vtmp->latency_index = (vtmp->latency_index + 1);
1057 }
1058 break;
1059 case DSET_BYTES:
1060 sscanf(val, "%lf", &tmp_d);
1061 uv.gauge = tmp_d;
1062 break;
1063 case DSET_RATE:
1064 sscanf(val, "%" PRIu64, &tmp_u);
1065 uv.derive = tmp_u;
1066 break;
1067 case DSET_TYPE_UNFOUND:
1068 default:
1069 ERROR("ceph plugin: ds %s was not properly initialized.", ds_name);
1070 return -1;
1071 }
1073 sstrncpy(vtmp->vlist.type, ceph_dset_types[type], sizeof(vtmp->vlist.type));
1074 sstrncpy(vtmp->vlist.type_instance, ds_name, sizeof(vtmp->vlist.type_instance));
1075 vtmp->vlist.values = &uv;
1076 vtmp->vlist.values_len = 1;
1078 vtmp->index = (vtmp->index + 1);
1079 plugin_dispatch_values(&vtmp->vlist);
1081 return 0;
1082 }
1084 static int cconn_connect(struct cconn *io)
1085 {
1086 struct sockaddr_un address = { 0 };
1087 int flags, fd, err;
1088 if(io->state != CSTATE_UNCONNECTED)
1089 {
1090 ERROR("ceph plugin: cconn_connect: io->state != CSTATE_UNCONNECTED");
1091 return -EDOM;
1092 }
1093 fd = socket(PF_UNIX, SOCK_STREAM, 0);
1094 if(fd < 0)
1095 {
1096 err = -errno;
1097 ERROR("ceph plugin: cconn_connect: socket(PF_UNIX, SOCK_STREAM, 0) "
1098 "failed: error %d", err);
1099 return err;
1100 }
1101 address.sun_family = AF_UNIX;
1102 snprintf(address.sun_path, sizeof(address.sun_path), "%s",
1103 io->d->asok_path);
1104 RETRY_ON_EINTR(err,
1105 connect(fd, (struct sockaddr *) &address, sizeof(struct sockaddr_un)));
1106 if(err < 0)
1107 {
1108 ERROR("ceph plugin: cconn_connect: connect(%d) failed: error %d",
1109 fd, err);
1110 close(fd);
1111 return err;
1112 }
1114 flags = fcntl(fd, F_GETFL, 0);
1115 if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) != 0)
1116 {
1117 err = -errno;
1118 ERROR("ceph plugin: cconn_connect: fcntl(%d, O_NONBLOCK) error %d",
1119 fd, err);
1120 close(fd);
1121 return err;
1122 }
1123 io->asok = fd;
1124 io->state = CSTATE_WRITE_REQUEST;
1125 io->amt = 0;
1126 io->json_len = 0;
1127 io->json = NULL;
1128 return 0;
1129 }
1131 static void cconn_close(struct cconn *io)
1132 {
1133 io->state = CSTATE_UNCONNECTED;
1134 if(io->asok != -1)
1135 {
1136 int res;
1137 RETRY_ON_EINTR(res, close(io->asok));
1138 }
1139 io->asok = -1;
1140 io->amt = 0;
1141 io->json_len = 0;
1142 sfree(io->json);
1143 io->json = NULL;
1144 }
1146 /* Process incoming JSON counter data */
1147 static int
1148 cconn_process_data(struct cconn *io, yajl_struct *yajl, yajl_handle hand)
1149 {
1150 int ret;
1151 struct values_tmp *vtmp = calloc(1, sizeof(struct values_tmp) * 1);
1152 if(!vtmp)
1153 {
1154 return -ENOMEM;
1155 }
1157 vtmp->vlist = (value_list_t)VALUE_LIST_INIT;
1158 sstrncpy(vtmp->vlist.host, hostname_g, sizeof(vtmp->vlist.host));
1159 sstrncpy(vtmp->vlist.plugin, "ceph", sizeof(vtmp->vlist.plugin));
1160 sstrncpy(vtmp->vlist.plugin_instance, io->d->name, sizeof(vtmp->vlist.plugin_instance));
1162 vtmp->d = io->d;
1163 vtmp->avgcount_exists = -1;
1164 vtmp->latency_index = 0;
1165 vtmp->index = 0;
1166 yajl->handler_arg = vtmp;
1167 ret = traverse_json(io->json, io->json_len, hand);
1168 sfree(vtmp);
1169 return ret;
1170 }
1172 /**
1173 * Initiate JSON parsing and print error if one occurs
1174 */
1175 static int cconn_process_json(struct cconn *io)
1176 {
1177 if((io->request_type != ASOK_REQ_DATA) &&
1178 (io->request_type != ASOK_REQ_SCHEMA))
1179 {
1180 return -EDOM;
1181 }
1183 int result = 1;
1184 yajl_handle hand;
1185 yajl_status status;
1187 hand = yajl_alloc(&callbacks,
1188 #if HAVE_YAJL_V2
1189 /* alloc funcs = */ NULL,
1190 #else
1191 /* alloc funcs = */ NULL, NULL,
1192 #endif
1193 /* context = */ (void *)(&io->yajl));
1195 if(!hand)
1196 {
1197 ERROR ("ceph plugin: yajl_alloc failed.");
1198 return ENOMEM;
1199 }
1201 io->yajl.depth = 0;
1203 switch(io->request_type)
1204 {
1205 case ASOK_REQ_DATA:
1206 io->yajl.handler = node_handler_fetch_data;
1207 result = cconn_process_data(io, &io->yajl, hand);
1208 break;
1209 case ASOK_REQ_SCHEMA:
1210 //init daemon specific variables
1211 io->d->ds_num = 0;
1212 io->d->last_idx = 0;
1213 io->d->last_poll_data = NULL;
1214 io->yajl.handler = node_handler_define_schema;
1215 io->yajl.handler_arg = io->d;
1216 result = traverse_json(io->json, io->json_len, hand);
1217 break;
1218 }
1220 if(result)
1221 {
1222 goto done;
1223 }
1225 #if HAVE_YAJL_V2
1226 status = yajl_complete_parse(hand);
1227 #else
1228 status = yajl_parse_complete(hand);
1229 #endif
1231 if (status != yajl_status_ok)
1232 {
1233 unsigned char *errmsg = yajl_get_error (hand, /* verbose = */ 0,
1234 /* jsonText = */ NULL, /* jsonTextLen = */ 0);
1235 ERROR ("ceph plugin: yajl_parse_complete failed: %s",
1236 (char *) errmsg);
1237 yajl_free_error (hand, errmsg);
1238 yajl_free (hand);
1239 return 1;
1240 }
1242 done:
1243 yajl_free (hand);
1244 return result;
1245 }
1247 static int cconn_validate_revents(struct cconn *io, int revents)
1248 {
1249 if(revents & POLLERR)
1250 {
1251 ERROR("ceph plugin: cconn_validate_revents(name=%s): got POLLERR",
1252 io->d->name);
1253 return -EIO;
1254 }
1255 switch (io->state)
1256 {
1257 case CSTATE_WRITE_REQUEST:
1258 return (revents & POLLOUT) ? 0 : -EINVAL;
1259 case CSTATE_READ_VERSION:
1260 case CSTATE_READ_AMT:
1261 case CSTATE_READ_JSON:
1262 return (revents & POLLIN) ? 0 : -EINVAL;
1263 default:
1264 ERROR("ceph plugin: cconn_validate_revents(name=%s) got to "
1265 "illegal state on line %d", io->d->name, __LINE__);
1266 return -EDOM;
1267 }
1268 }
1270 /** Handle a network event for a connection */
1271 static int cconn_handle_event(struct cconn *io)
1272 {
1273 int ret;
1274 switch (io->state)
1275 {
1276 case CSTATE_UNCONNECTED:
1277 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1278 "state on line %d", io->d->name, __LINE__);
1280 return -EDOM;
1281 case CSTATE_WRITE_REQUEST:
1282 {
1283 char cmd[32];
1284 snprintf(cmd, sizeof(cmd), "%s%d%s", "{ \"prefix\": \"",
1285 io->request_type, "\" }\n");
1286 size_t cmd_len = strlen(cmd);
1287 RETRY_ON_EINTR(ret,
1288 write(io->asok, ((char*)&cmd) + io->amt, cmd_len - io->amt));
1289 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,amt=%d,ret=%d)",
1290 io->d->name, io->state, io->amt, ret);
1291 if(ret < 0)
1292 {
1293 return ret;
1294 }
1295 io->amt += ret;
1296 if(io->amt >= cmd_len)
1297 {
1298 io->amt = 0;
1299 switch (io->request_type)
1300 {
1301 case ASOK_REQ_VERSION:
1302 io->state = CSTATE_READ_VERSION;
1303 break;
1304 default:
1305 io->state = CSTATE_READ_AMT;
1306 break;
1307 }
1308 }
1309 return 0;
1310 }
1311 case CSTATE_READ_VERSION:
1312 {
1313 RETRY_ON_EINTR(ret,
1314 read(io->asok, ((char*)(&io->d->version)) + io->amt,
1315 sizeof(io->d->version) - io->amt));
1316 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1317 io->d->name, io->state, ret);
1318 if(ret < 0)
1319 {
1320 return ret;
1321 }
1322 io->amt += ret;
1323 if(io->amt >= sizeof(io->d->version))
1324 {
1325 io->d->version = ntohl(io->d->version);
1326 if(io->d->version != 1)
1327 {
1328 ERROR("ceph plugin: cconn_handle_event(name=%s) not "
1329 "expecting version %d!", io->d->name, io->d->version);
1330 return -ENOTSUP;
1331 }
1332 DEBUG("ceph plugin: cconn_handle_event(name=%s): identified as "
1333 "version %d", io->d->name, io->d->version);
1334 io->amt = 0;
1335 cconn_close(io);
1336 io->request_type = ASOK_REQ_SCHEMA;
1337 }
1338 return 0;
1339 }
1340 case CSTATE_READ_AMT:
1341 {
1342 RETRY_ON_EINTR(ret,
1343 read(io->asok, ((char*)(&io->json_len)) + io->amt,
1344 sizeof(io->json_len) - io->amt));
1345 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1346 io->d->name, io->state, ret);
1347 if(ret < 0)
1348 {
1349 return ret;
1350 }
1351 io->amt += ret;
1352 if(io->amt >= sizeof(io->json_len))
1353 {
1354 io->json_len = ntohl(io->json_len);
1355 io->amt = 0;
1356 io->state = CSTATE_READ_JSON;
1357 io->json = calloc(1, io->json_len + 1);
1358 if(!io->json)
1359 {
1360 ERROR("ceph plugin: error callocing io->json");
1361 return -ENOMEM;
1362 }
1363 }
1364 return 0;
1365 }
1366 case CSTATE_READ_JSON:
1367 {
1368 RETRY_ON_EINTR(ret,
1369 read(io->asok, io->json + io->amt, io->json_len - io->amt));
1370 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1371 io->d->name, io->state, ret);
1372 if(ret < 0)
1373 {
1374 return ret;
1375 }
1376 io->amt += ret;
1377 if(io->amt >= io->json_len)
1378 {
1379 ret = cconn_process_json(io);
1380 if(ret)
1381 {
1382 return ret;
1383 }
1384 cconn_close(io);
1385 io->request_type = ASOK_REQ_NONE;
1386 }
1387 return 0;
1388 }
1389 default:
1390 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1391 "state on line %d", io->d->name, __LINE__);
1392 return -EDOM;
1393 }
1394 }
1396 static int cconn_prepare(struct cconn *io, struct pollfd* fds)
1397 {
1398 int ret;
1399 if(io->request_type == ASOK_REQ_NONE)
1400 {
1401 /* The request has already been serviced. */
1402 return 0;
1403 }
1404 else if((io->request_type == ASOK_REQ_DATA) && (io->d->ds_num == 0))
1405 {
1406 /* If there are no counters to report on, don't bother
1407 * connecting */
1408 return 0;
1409 }
1411 switch (io->state)
1412 {
1413 case CSTATE_UNCONNECTED:
1414 ret = cconn_connect(io);
1415 if(ret > 0)
1416 {
1417 return -ret;
1418 }
1419 else if(ret < 0)
1420 {
1421 return ret;
1422 }
1423 fds->fd = io->asok;
1424 fds->events = POLLOUT;
1425 return 1;
1426 case CSTATE_WRITE_REQUEST:
1427 fds->fd = io->asok;
1428 fds->events = POLLOUT;
1429 return 1;
1430 case CSTATE_READ_VERSION:
1431 case CSTATE_READ_AMT:
1432 case CSTATE_READ_JSON:
1433 fds->fd = io->asok;
1434 fds->events = POLLIN;
1435 return 1;
1436 default:
1437 ERROR("ceph plugin: cconn_prepare(name=%s) got to illegal state "
1438 "on line %d", io->d->name, __LINE__);
1439 return -EDOM;
1440 }
1441 }
1443 /** Returns the difference between two struct timevals in milliseconds.
1444 * On overflow, we return max/min int.
1445 */
1446 static int milli_diff(const struct timeval *t1, const struct timeval *t2)
1447 {
1448 int64_t ret;
1449 int sec_diff = t1->tv_sec - t2->tv_sec;
1450 int usec_diff = t1->tv_usec - t2->tv_usec;
1451 ret = usec_diff / 1000;
1452 ret += (sec_diff * 1000);
1453 return (ret > INT_MAX) ? INT_MAX : ((ret < INT_MIN) ? INT_MIN : (int)ret);
1454 }
1456 /** This handles the actual network I/O to talk to the Ceph daemons.
1457 */
1458 static int cconn_main_loop(uint32_t request_type)
1459 {
1460 int i, ret, some_unreachable = 0;
1461 struct timeval end_tv;
1462 struct cconn io_array[g_num_daemons];
1464 DEBUG("ceph plugin: entering cconn_main_loop(request_type = %d)", request_type);
1466 /* create cconn array */
1467 memset(io_array, 0, sizeof(io_array));
1468 for(i = 0; i < g_num_daemons; ++i)
1469 {
1470 io_array[i].d = g_daemons[i];
1471 io_array[i].request_type = request_type;
1472 io_array[i].state = CSTATE_UNCONNECTED;
1473 }
1475 /** Calculate the time at which we should give up */
1476 gettimeofday(&end_tv, NULL);
1477 end_tv.tv_sec += CEPH_TIMEOUT_INTERVAL;
1479 while (1)
1480 {
1481 int nfds, diff;
1482 struct timeval tv;
1483 struct cconn *polled_io_array[g_num_daemons];
1484 struct pollfd fds[g_num_daemons];
1485 memset(fds, 0, sizeof(fds));
1486 nfds = 0;
1487 for(i = 0; i < g_num_daemons; ++i)
1488 {
1489 struct cconn *io = io_array + i;
1490 ret = cconn_prepare(io, fds + nfds);
1491 if(ret < 0)
1492 {
1493 WARNING("ceph plugin: cconn_prepare(name=%s,i=%d,st=%d)=%d",
1494 io->d->name, i, io->state, ret);
1495 cconn_close(io);
1496 io->request_type = ASOK_REQ_NONE;
1497 some_unreachable = 1;
1498 }
1499 else if(ret == 1)
1500 {
1501 polled_io_array[nfds++] = io_array + i;
1502 }
1503 }
1504 if(nfds == 0)
1505 {
1506 /* finished */
1507 ret = 0;
1508 goto done;
1509 }
1510 gettimeofday(&tv, NULL);
1511 diff = milli_diff(&end_tv, &tv);
1512 if(diff <= 0)
1513 {
1514 /* Timed out */
1515 ret = -ETIMEDOUT;
1516 WARNING("ceph plugin: cconn_main_loop: timed out.");
1517 goto done;
1518 }
1519 RETRY_ON_EINTR(ret, poll(fds, nfds, diff));
1520 if(ret < 0)
1521 {
1522 ERROR("ceph plugin: poll(2) error: %d", ret);
1523 goto done;
1524 }
1525 for(i = 0; i < nfds; ++i)
1526 {
1527 struct cconn *io = polled_io_array[i];
1528 int revents = fds[i].revents;
1529 if(revents == 0)
1530 {
1531 /* do nothing */
1532 }
1533 else if(cconn_validate_revents(io, revents))
1534 {
1535 WARNING("ceph plugin: cconn(name=%s,i=%d,st=%d): "
1536 "revents validation error: "
1537 "revents=0x%08x", io->d->name, i, io->state, revents);
1538 cconn_close(io);
1539 io->request_type = ASOK_REQ_NONE;
1540 some_unreachable = 1;
1541 }
1542 else
1543 {
1544 ret = cconn_handle_event(io);
1545 if(ret)
1546 {
1547 WARNING("ceph plugin: cconn_handle_event(name=%s,"
1548 "i=%d,st=%d): error %d", io->d->name, i, io->state, ret);
1549 cconn_close(io);
1550 io->request_type = ASOK_REQ_NONE;
1551 some_unreachable = 1;
1552 }
1553 }
1554 }
1555 }
1556 done: for(i = 0; i < g_num_daemons; ++i)
1557 {
1558 cconn_close(io_array + i);
1559 }
1560 if(some_unreachable)
1561 {
1562 DEBUG("ceph plugin: cconn_main_loop: some Ceph daemons were unreachable.");
1563 }
1564 else
1565 {
1566 DEBUG("ceph plugin: cconn_main_loop: reached all Ceph daemons :)");
1567 }
1568 return ret;
1569 }
1571 static int ceph_read(void)
1572 {
1573 return cconn_main_loop(ASOK_REQ_DATA);
1574 }
1576 /******* lifecycle *******/
1577 static int ceph_init(void)
1578 {
1579 int ret;
1580 ceph_daemons_print();
1582 ret = cconn_main_loop(ASOK_REQ_VERSION);
1584 return (ret) ? ret : 0;
1585 }
1587 static int ceph_shutdown(void)
1588 {
1589 int i;
1590 for(i = 0; i < g_num_daemons; ++i)
1591 {
1592 ceph_daemon_free(g_daemons[i]);
1593 }
1594 sfree(g_daemons);
1595 g_daemons = NULL;
1596 g_num_daemons = 0;
1597 DEBUG("ceph plugin: finished ceph_shutdown");
1598 return 0;
1599 }
1601 void module_register(void)
1602 {
1603 plugin_register_complex_config("ceph", ceph_config);
1604 plugin_register_init("ceph", ceph_init);
1605 plugin_register_read("ceph", ceph_read);
1606 plugin_register_shutdown("ceph", ceph_shutdown);
1607 }
1608 /* vim: set sw=4 sts=4 et : */