1 /**
2 * collectd - src/ceph.c
3 * Copyright (C) 2011 New Dream Network
4 * Copyright (C) 2015 Florian octo Forster
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Colin McCabe <cmccabe at alumni.cmu.edu>
21 * Dennis Zou <yunzou at cisco.com>
22 * Dan Ryder <daryder at cisco.com>
23 * Florian octo Forster <octo at collectd.org>
24 **/
26 #define _DEFAULT_SOURCE
27 #define _BSD_SOURCE
29 #include "collectd.h"
31 #include "common.h"
32 #include "plugin.h"
34 #include <arpa/inet.h>
35 #include <errno.h>
36 #include <fcntl.h>
37 #include <yajl/yajl_parse.h>
38 #if HAVE_YAJL_YAJL_VERSION_H
39 #include <yajl/yajl_version.h>
40 #endif
42 #include <limits.h>
43 #include <poll.h>
44 #include <stdint.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <strings.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 static const char * const 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;
139 char *key;
140 char *stack[YAJL_MAX_DEPTH];
141 size_t depth;
142 };
143 typedef struct yajl_struct yajl_struct;
145 enum perfcounter_type_d
146 {
147 PERFCOUNTER_LATENCY = 0x4, PERFCOUNTER_DERIVE = 0x8,
148 };
150 /** Give user option to use default (long run = since daemon started) avg */
151 static int long_run_latency_avg = 0;
153 /**
154 * Give user option to use default type for special cases -
155 * filestore.journal_wr_bytes is currently only metric here. Ceph reports the
156 * type as a sum/count pair and will calculate it the same as a latency value.
157 * All other "bytes" metrics (excluding the used/capacity bytes for the OSD)
158 * use the DERIVE type. Unless user specifies to use given type, convert this
159 * metric to use DERIVE.
160 */
161 static int convert_special_metrics = 1;
163 /** Array of daemons to monitor */
164 static struct ceph_daemon **g_daemons = NULL;
166 /** Number of elements in g_daemons */
167 static int g_num_daemons = 0;
169 /**
170 * A set of data that we build up in memory while parsing the JSON.
171 */
172 struct values_tmp
173 {
174 /** ceph daemon we are processing data for*/
175 struct ceph_daemon *d;
176 /** track avgcount across counters for avgcount/sum latency pairs */
177 uint64_t avgcount;
178 /** current index of counters - used to get type of counter */
179 int index;
180 /** do we already have an avgcount for latency pair */
181 int avgcount_exists;
182 /**
183 * similar to index, but current index of latency type counters -
184 * used to get last poll data of counter
185 */
186 int latency_index;
187 /**
188 * values list - maintain across counters since
189 * host/plugin/plugin instance are always the same
190 */
191 value_list_t vlist;
192 };
194 /**
195 * A set of count/sum pairs to keep track of latency types and get difference
196 * between this poll data and last poll data.
197 */
198 struct last_data
199 {
200 char ds_name[DATA_MAX_NAME_LEN];
201 double last_sum;
202 uint64_t last_count;
203 };
205 /******* network I/O *******/
206 enum cstate_t
207 {
208 CSTATE_UNCONNECTED = 0,
209 CSTATE_WRITE_REQUEST,
210 CSTATE_READ_VERSION,
211 CSTATE_READ_AMT,
212 CSTATE_READ_JSON,
213 };
215 enum request_type_t
216 {
217 ASOK_REQ_VERSION = 0,
218 ASOK_REQ_DATA = 1,
219 ASOK_REQ_SCHEMA = 2,
220 ASOK_REQ_NONE = 1000,
221 };
223 struct cconn
224 {
225 /** The Ceph daemon that we're talking to */
226 struct ceph_daemon *d;
228 /** Request type */
229 uint32_t request_type;
231 /** The connection state */
232 enum cstate_t state;
234 /** The socket we use to talk to this daemon */
235 int asok;
237 /** The amount of data remaining to read / write. */
238 uint32_t amt;
240 /** Length of the JSON to read */
241 uint32_t json_len;
243 /** Buffer containing JSON data */
244 unsigned char *json;
246 /** Keep data important to yajl processing */
247 struct yajl_struct yajl;
248 };
250 static int ceph_cb_null(void *ctx)
251 {
252 return CEPH_CB_CONTINUE;
253 }
255 static int ceph_cb_boolean(void *ctx, int bool_val)
256 {
257 return CEPH_CB_CONTINUE;
258 }
260 #define BUFFER_ADD(dest, src) do { \
261 size_t dest_size = sizeof (dest); \
262 strncat ((dest), (src), dest_size - strlen (dest)); \
263 (dest)[dest_size - 1] = '\0'; \
264 } while (0)
266 static int
267 ceph_cb_number(void *ctx, const char *number_val, yajl_len_t number_len)
268 {
269 yajl_struct *state = (yajl_struct*) ctx;
270 char buffer[number_len+1];
271 char key[2 * DATA_MAX_NAME_LEN];
272 _Bool latency_type = 0;
273 int status;
275 key[0] = '\0';
276 memcpy(buffer, number_val, number_len);
277 buffer[sizeof(buffer) - 1] = '\0';
279 for (size_t 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 for(int i = 0; i < g_num_daemons; ++i)
426 {
427 ceph_daemon_print(g_daemons[i]);
428 }
429 }
431 static void ceph_daemon_free(struct ceph_daemon *d)
432 {
433 for(int i = 0; i < d->last_idx; i++)
434 {
435 sfree(d->last_poll_data[i]);
436 }
437 sfree(d->last_poll_data);
438 d->last_poll_data = NULL;
439 d->last_idx = 0;
441 for(int i = 0; i < d->ds_num; i++)
442 {
443 sfree(d->ds_names[i]);
444 }
445 sfree(d->ds_types);
446 sfree(d->ds_names);
447 sfree(d);
448 }
450 /* compact_ds_name removed the special characters ":", "_", "-" and "+" from the
451 * intput string. Characters following these special characters are capitalized.
452 * Trailing "+" and "-" characters are replaces with the strings "Plus" and
453 * "Minus". */
454 static int compact_ds_name (char *buffer, size_t buffer_size, char const *src)
455 {
456 char *src_copy;
457 size_t src_len;
458 char *ptr = buffer;
459 size_t ptr_size = buffer_size;
460 _Bool append_plus = 0;
461 _Bool append_minus = 0;
463 if ((buffer == NULL) || (buffer_size <= strlen ("Minus")) || (src == NULL))
464 return EINVAL;
466 src_copy = strdup (src);
467 src_len = strlen(src);
469 /* Remove trailing "+" and "-". */
470 if (src_copy[src_len - 1] == '+')
471 {
472 append_plus = 1;
473 src_len--;
474 src_copy[src_len] = 0;
475 }
476 else if (src_copy[src_len - 1] == '-')
477 {
478 append_minus = 1;
479 src_len--;
480 src_copy[src_len] = 0;
481 }
483 /* Split at special chars, capitalize first character, append to buffer. */
484 char *dummy = src_copy;
485 char *token;
486 char *save_ptr = NULL;
487 while ((token = strtok_r (dummy, ":_-+", &save_ptr)) != NULL)
488 {
489 size_t len;
491 dummy = NULL;
493 token[0] = toupper ((int) token[0]);
495 assert (ptr_size > 1);
497 len = strlen (token);
498 if (len >= ptr_size)
499 len = ptr_size - 1;
501 assert (len > 0);
502 assert (len < ptr_size);
504 sstrncpy (ptr, token, len + 1);
505 ptr += len;
506 ptr_size -= len;
508 assert (*ptr == 0);
509 if (ptr_size <= 1)
510 break;
511 }
513 /* Append "Plus" or "Minus" if "+" or "-" has been stripped above. */
514 if (append_plus || append_minus)
515 {
516 char const *append = "Plus";
517 if (append_minus)
518 append = "Minus";
520 size_t offset = buffer_size - (strlen (append) + 1);
521 if (offset > strlen (buffer))
522 offset = strlen (buffer);
524 sstrncpy (buffer + offset, append, buffer_size - offset);
525 }
527 sfree (src_copy);
528 return 0;
529 }
531 static _Bool has_suffix (char const *str, char const *suffix)
532 {
533 size_t str_len = strlen (str);
534 size_t suffix_len = strlen (suffix);
535 size_t offset;
537 if (suffix_len > str_len)
538 return 0;
539 offset = str_len - suffix_len;
541 if (strcmp (str + offset, suffix) == 0)
542 return 1;
544 return 0;
545 }
547 /* count_parts returns the number of elements a "foo.bar.baz" style key has. */
548 static size_t count_parts (char const *key)
549 {
550 size_t parts_num = 0;
552 for (const char *ptr = key; ptr != NULL; ptr = strchr (ptr + 1, '.'))
553 parts_num++;
555 return parts_num;
556 }
558 /**
559 * Parse key to remove "type" if this is for schema and initiate compaction
560 */
561 static int parse_keys (char *buffer, size_t buffer_size, const char *key_str)
562 {
563 char tmp[2 * buffer_size];
565 if (buffer == NULL || buffer_size == 0 || key_str == NULL || strlen (key_str) == 0)
566 return EINVAL;
568 if ((count_parts (key_str) > 2) && has_suffix (key_str, ".type"))
569 {
570 /* strip ".type" suffix iff the key has more than two parts. */
571 size_t sz = strlen (key_str) - strlen (".type") + 1;
573 if (sz > sizeof (tmp))
574 sz = sizeof (tmp);
575 sstrncpy (tmp, key_str, sz);
576 }
577 else
578 {
579 sstrncpy (tmp, key_str, sizeof (tmp));
580 }
582 return compact_ds_name (buffer, buffer_size, tmp);
583 }
585 /**
586 * while parsing ceph admin socket schema, save counter name and type for later
587 * data processing
588 */
589 static int ceph_daemon_add_ds_entry(struct ceph_daemon *d, const char *name,
590 int pc_type)
591 {
592 uint32_t type;
593 char ds_name[DATA_MAX_NAME_LEN];
595 if(convert_special_metrics)
596 {
597 /**
598 * Special case for filestore:JournalWrBytes. For some reason, Ceph
599 * schema encodes this as a count/sum pair while all other "Bytes" data
600 * (excluding used/capacity bytes for OSD space) uses a single "Derive"
601 * type. To spare further confusion, keep this KPI as the same type of
602 * other "Bytes". Instead of keeping an "average" or "rate", use the
603 * "sum" in the pair and assign that to the derive value.
604 */
605 if((strcmp(name,"filestore.journal_wr_bytes.type") == 0))
606 {
607 pc_type = 10;
608 }
609 }
611 d->ds_names = realloc(d->ds_names, sizeof(char *) * (d->ds_num + 1));
612 if(!d->ds_names)
613 {
614 return -ENOMEM;
615 }
617 d->ds_types = realloc(d->ds_types, sizeof(uint32_t) * (d->ds_num + 1));
618 if(!d->ds_types)
619 {
620 return -ENOMEM;
621 }
623 d->ds_names[d->ds_num] = malloc(DATA_MAX_NAME_LEN);
624 if(!d->ds_names[d->ds_num])
625 {
626 return -ENOMEM;
627 }
629 type = (pc_type & PERFCOUNTER_DERIVE) ? DSET_RATE :
630 ((pc_type & PERFCOUNTER_LATENCY) ? DSET_LATENCY : DSET_BYTES);
631 d->ds_types[d->ds_num] = type;
633 if (parse_keys(ds_name, sizeof (ds_name), name))
634 {
635 return 1;
636 }
638 sstrncpy(d->ds_names[d->ds_num], ds_name, DATA_MAX_NAME_LEN -1);
639 d->ds_num = (d->ds_num + 1);
641 return 0;
642 }
644 /******* ceph_config *******/
645 static int cc_handle_str(struct oconfig_item_s *item, char *dest, int dest_len)
646 {
647 const char *val;
648 if(item->values_num != 1)
649 {
650 return -ENOTSUP;
651 }
652 if(item->values[0].type != OCONFIG_TYPE_STRING)
653 {
654 return -ENOTSUP;
655 }
656 val = item->values[0].value.string;
657 if(snprintf(dest, dest_len, "%s", val) > (dest_len - 1))
658 {
659 ERROR("ceph plugin: configuration parameter '%s' is too long.\n",
660 item->key);
661 return -ENAMETOOLONG;
662 }
663 return 0;
664 }
666 static int cc_handle_bool(struct oconfig_item_s *item, int *dest)
667 {
668 if(item->values_num != 1)
669 {
670 return -ENOTSUP;
671 }
673 if(item->values[0].type != OCONFIG_TYPE_BOOLEAN)
674 {
675 return -ENOTSUP;
676 }
678 *dest = (item->values[0].value.boolean) ? 1 : 0;
679 return 0;
680 }
682 static int cc_add_daemon_config(oconfig_item_t *ci)
683 {
684 int ret;
685 struct ceph_daemon *nd, cd = { 0 };
686 struct ceph_daemon **tmp;
688 if((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
689 {
690 WARNING("ceph plugin: `Daemon' blocks need exactly one string "
691 "argument.");
692 return (-1);
693 }
695 ret = cc_handle_str(ci, cd.name, DATA_MAX_NAME_LEN);
696 if(ret)
697 {
698 return ret;
699 }
701 for(int i=0; i < ci->children_num; i++)
702 {
703 oconfig_item_t *child = ci->children + i;
705 if(strcasecmp("SocketPath", child->key) == 0)
706 {
707 ret = cc_handle_str(child, cd.asok_path, sizeof(cd.asok_path));
708 if(ret)
709 {
710 return ret;
711 }
712 }
713 else
714 {
715 WARNING("ceph plugin: ignoring unknown option %s", child->key);
716 }
717 }
718 if(cd.name[0] == '\0')
719 {
720 ERROR("ceph plugin: you must configure a daemon name.\n");
721 return -EINVAL;
722 }
723 else if(cd.asok_path[0] == '\0')
724 {
725 ERROR("ceph plugin(name=%s): you must configure an administrative "
726 "socket path.\n", cd.name);
727 return -EINVAL;
728 }
729 else if(!((cd.asok_path[0] == '/') ||
730 (cd.asok_path[0] == '.' && cd.asok_path[1] == '/')))
731 {
732 ERROR("ceph plugin(name=%s): administrative socket paths must begin "
733 "with '/' or './' Can't parse: '%s'\n", cd.name, cd.asok_path);
734 return -EINVAL;
735 }
737 tmp = realloc(g_daemons, (g_num_daemons+1) * sizeof(*g_daemons));
738 if(tmp == NULL)
739 {
740 /* The positive return value here indicates that this is a
741 * runtime error, not a configuration error. */
742 return ENOMEM;
743 }
744 g_daemons = tmp;
746 nd = malloc(sizeof (*nd));
747 if(!nd)
748 {
749 return ENOMEM;
750 }
751 memcpy(nd, &cd, sizeof(*nd));
752 g_daemons[g_num_daemons++] = nd;
753 return 0;
754 }
756 static int ceph_config(oconfig_item_t *ci)
757 {
758 int ret;
760 for(int i = 0; i < ci->children_num; ++i)
761 {
762 oconfig_item_t *child = ci->children + i;
763 if(strcasecmp("Daemon", child->key) == 0)
764 {
765 ret = cc_add_daemon_config(child);
766 if(ret == ENOMEM)
767 {
768 ERROR("ceph plugin: Couldn't allocate memory");
769 return ret;
770 }
771 else if(ret)
772 {
773 //process other daemons and ignore this one
774 continue;
775 }
776 }
777 else if(strcasecmp("LongRunAvgLatency", child->key) == 0)
778 {
779 ret = cc_handle_bool(child, &long_run_latency_avg);
780 if(ret)
781 {
782 return ret;
783 }
784 }
785 else if(strcasecmp("ConvertSpecialMetricTypes", child->key) == 0)
786 {
787 ret = cc_handle_bool(child, &convert_special_metrics);
788 if(ret)
789 {
790 return ret;
791 }
792 }
793 else
794 {
795 WARNING("ceph plugin: ignoring unknown option %s", child->key);
796 }
797 }
798 return 0;
799 }
801 /**
802 * Parse JSON and get error message if present
803 */
804 static int
805 traverse_json(const unsigned char *json, uint32_t json_len, yajl_handle hand)
806 {
807 yajl_status status = yajl_parse(hand, json, json_len);
808 unsigned char *msg;
810 switch(status)
811 {
812 case yajl_status_error:
813 msg = yajl_get_error(hand, /* verbose = */ 1,
814 /* jsonText = */ (unsigned char *) json,
815 (unsigned int) json_len);
816 ERROR ("ceph plugin: yajl_parse failed: %s", msg);
817 yajl_free_error(hand, msg);
818 return 1;
819 case yajl_status_client_canceled:
820 return 1;
821 default:
822 return 0;
823 }
824 }
826 /**
827 * Add entry for each counter while parsing schema
828 */
829 static int
830 node_handler_define_schema(void *arg, const char *val, const char *key)
831 {
832 struct ceph_daemon *d = (struct ceph_daemon *) arg;
833 int pc_type;
834 pc_type = atoi(val);
835 return ceph_daemon_add_ds_entry(d, key, pc_type);
836 }
838 /**
839 * Latency counter does not yet have an entry in last poll data - add it.
840 */
841 static int add_last(struct ceph_daemon *d, const char *ds_n, double cur_sum,
842 uint64_t cur_count)
843 {
844 d->last_poll_data[d->last_idx] = malloc(sizeof (*d->last_poll_data[d->last_idx]));
845 if(!d->last_poll_data[d->last_idx])
846 {
847 return -ENOMEM;
848 }
849 sstrncpy(d->last_poll_data[d->last_idx]->ds_name,ds_n,
850 sizeof(d->last_poll_data[d->last_idx]->ds_name));
851 d->last_poll_data[d->last_idx]->last_sum = cur_sum;
852 d->last_poll_data[d->last_idx]->last_count = cur_count;
853 d->last_idx = (d->last_idx + 1);
854 return 0;
855 }
857 /**
858 * Update latency counter or add new entry if it doesn't exist
859 */
860 static int update_last(struct ceph_daemon *d, const char *ds_n, int index,
861 double cur_sum, uint64_t cur_count)
862 {
863 if((d->last_idx > index) && (strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0))
864 {
865 d->last_poll_data[index]->last_sum = cur_sum;
866 d->last_poll_data[index]->last_count = cur_count;
867 return 0;
868 }
870 if(!d->last_poll_data)
871 {
872 d->last_poll_data = malloc(sizeof (*d->last_poll_data));
873 if(!d->last_poll_data)
874 {
875 return -ENOMEM;
876 }
877 }
878 else
879 {
880 struct last_data **tmp_last = realloc(d->last_poll_data,
881 ((d->last_idx+1) * sizeof(struct last_data *)));
882 if(!tmp_last)
883 {
884 return -ENOMEM;
885 }
886 d->last_poll_data = tmp_last;
887 }
888 return add_last(d, ds_n, cur_sum, cur_count);
889 }
891 /**
892 * If using index guess failed (shouldn't happen, but possible if counters
893 * get rearranged), resort to searching for counter name
894 */
895 static int backup_search_for_last_avg(struct ceph_daemon *d, const char *ds_n)
896 {
897 for(int i = 0; i < d->last_idx; i++)
898 {
899 if(strcmp(d->last_poll_data[i]->ds_name, ds_n) == 0)
900 {
901 return i;
902 }
903 }
904 return -1;
905 }
907 /**
908 * Calculate average b/t current data and last poll data
909 * if last poll data exists
910 */
911 static double get_last_avg(struct ceph_daemon *d, const char *ds_n, int index,
912 double cur_sum, uint64_t cur_count)
913 {
914 double result = -1.1, sum_delt = 0.0;
915 uint64_t count_delt = 0;
916 int tmp_index = 0;
917 if(d->last_idx > index)
918 {
919 if(strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0)
920 {
921 tmp_index = index;
922 }
923 //test previous index
924 else if((index > 0) && (strcmp(d->last_poll_data[index-1]->ds_name, ds_n) == 0))
925 {
926 tmp_index = (index - 1);
927 }
928 else
929 {
930 tmp_index = backup_search_for_last_avg(d, ds_n);
931 }
933 if((tmp_index > -1) && (cur_count > d->last_poll_data[tmp_index]->last_count))
934 {
935 sum_delt = (cur_sum - d->last_poll_data[tmp_index]->last_sum);
936 count_delt = (cur_count - d->last_poll_data[tmp_index]->last_count);
937 result = (sum_delt / count_delt);
938 }
939 }
941 if(result == -1.1)
942 {
943 result = NAN;
944 }
945 if(update_last(d, ds_n, tmp_index, cur_sum, cur_count) == -ENOMEM)
946 {
947 return -ENOMEM;
948 }
949 return result;
950 }
952 /**
953 * If using index guess failed, resort to searching for counter name
954 */
955 static uint32_t backup_search_for_type(struct ceph_daemon *d, char *ds_name)
956 {
957 for(int i = 0; i < d->ds_num; i++)
958 {
959 if(strcmp(d->ds_names[i], ds_name) == 0)
960 {
961 return d->ds_types[i];
962 }
963 }
964 return DSET_TYPE_UNFOUND;
965 }
967 /**
968 * Process counter data and dispatch values
969 */
970 static int node_handler_fetch_data(void *arg, const char *val, const char *key)
971 {
972 value_t uv;
973 double tmp_d;
974 uint64_t tmp_u;
975 struct values_tmp *vtmp = (struct values_tmp*) arg;
976 uint32_t type = DSET_TYPE_UNFOUND;
977 int index = vtmp->index;
979 char ds_name[DATA_MAX_NAME_LEN];
981 if (parse_keys (ds_name, sizeof (ds_name), key))
982 {
983 return 1;
984 }
986 if(index >= vtmp->d->ds_num)
987 {
988 //don't overflow bounds of array
989 index = (vtmp->d->ds_num - 1);
990 }
992 /**
993 * counters should remain in same order we parsed schema... we maintain the
994 * index variable to keep track of current point in list of counters. first
995 * use index to guess point in array for retrieving type. if that doesn't
996 * work, use the old way to get the counter type
997 */
998 if(strcmp(ds_name, vtmp->d->ds_names[index]) == 0)
999 {
1000 //found match
1001 type = vtmp->d->ds_types[index];
1002 }
1003 else if((index > 0) && (strcmp(ds_name, vtmp->d->ds_names[index-1]) == 0))
1004 {
1005 //try previous key
1006 type = vtmp->d->ds_types[index-1];
1007 }
1009 if(type == DSET_TYPE_UNFOUND)
1010 {
1011 //couldn't find right type by guessing, check the old way
1012 type = backup_search_for_type(vtmp->d, ds_name);
1013 }
1015 switch(type)
1016 {
1017 case DSET_LATENCY:
1018 if(vtmp->avgcount_exists == -1)
1019 {
1020 sscanf(val, "%" PRIu64, &vtmp->avgcount);
1021 vtmp->avgcount_exists = 0;
1022 //return after saving avgcount - don't dispatch value
1023 //until latency calculation
1024 return 0;
1025 }
1026 else
1027 {
1028 double sum, result;
1029 sscanf(val, "%lf", &sum);
1031 if(vtmp->avgcount == 0)
1032 {
1033 vtmp->avgcount = 1;
1034 }
1036 /** User wants latency values as long run avg */
1037 if(long_run_latency_avg)
1038 {
1039 result = (sum / vtmp->avgcount);
1040 }
1041 else
1042 {
1043 result = get_last_avg(vtmp->d, ds_name, vtmp->latency_index, sum, vtmp->avgcount);
1044 if(result == -ENOMEM)
1045 {
1046 return -ENOMEM;
1047 }
1048 }
1050 uv.gauge = result;
1051 vtmp->avgcount_exists = -1;
1052 vtmp->latency_index = (vtmp->latency_index + 1);
1053 }
1054 break;
1055 case DSET_BYTES:
1056 sscanf(val, "%lf", &tmp_d);
1057 uv.gauge = tmp_d;
1058 break;
1059 case DSET_RATE:
1060 sscanf(val, "%" PRIu64, &tmp_u);
1061 uv.derive = tmp_u;
1062 break;
1063 case DSET_TYPE_UNFOUND:
1064 default:
1065 ERROR("ceph plugin: ds %s was not properly initialized.", ds_name);
1066 return -1;
1067 }
1069 sstrncpy(vtmp->vlist.type, ceph_dset_types[type], sizeof(vtmp->vlist.type));
1070 sstrncpy(vtmp->vlist.type_instance, ds_name, sizeof(vtmp->vlist.type_instance));
1071 vtmp->vlist.values = &uv;
1072 vtmp->vlist.values_len = 1;
1074 vtmp->index = (vtmp->index + 1);
1075 plugin_dispatch_values(&vtmp->vlist);
1077 return 0;
1078 }
1080 static int cconn_connect(struct cconn *io)
1081 {
1082 struct sockaddr_un address = { 0 };
1083 int flags, fd, err;
1084 if(io->state != CSTATE_UNCONNECTED)
1085 {
1086 ERROR("ceph plugin: cconn_connect: io->state != CSTATE_UNCONNECTED");
1087 return -EDOM;
1088 }
1089 fd = socket(PF_UNIX, SOCK_STREAM, 0);
1090 if(fd < 0)
1091 {
1092 err = -errno;
1093 ERROR("ceph plugin: cconn_connect: socket(PF_UNIX, SOCK_STREAM, 0) "
1094 "failed: error %d", err);
1095 return err;
1096 }
1097 address.sun_family = AF_UNIX;
1098 snprintf(address.sun_path, sizeof(address.sun_path), "%s",
1099 io->d->asok_path);
1100 RETRY_ON_EINTR(err,
1101 connect(fd, (struct sockaddr *) &address, sizeof(struct sockaddr_un)));
1102 if(err < 0)
1103 {
1104 ERROR("ceph plugin: cconn_connect: connect(%d) failed: error %d",
1105 fd, err);
1106 close(fd);
1107 return err;
1108 }
1110 flags = fcntl(fd, F_GETFL, 0);
1111 if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) != 0)
1112 {
1113 err = -errno;
1114 ERROR("ceph plugin: cconn_connect: fcntl(%d, O_NONBLOCK) error %d",
1115 fd, err);
1116 close(fd);
1117 return err;
1118 }
1119 io->asok = fd;
1120 io->state = CSTATE_WRITE_REQUEST;
1121 io->amt = 0;
1122 io->json_len = 0;
1123 io->json = NULL;
1124 return 0;
1125 }
1127 static void cconn_close(struct cconn *io)
1128 {
1129 io->state = CSTATE_UNCONNECTED;
1130 if(io->asok != -1)
1131 {
1132 int res;
1133 RETRY_ON_EINTR(res, close(io->asok));
1134 }
1135 io->asok = -1;
1136 io->amt = 0;
1137 io->json_len = 0;
1138 sfree(io->json);
1139 io->json = NULL;
1140 }
1142 /* Process incoming JSON counter data */
1143 static int
1144 cconn_process_data(struct cconn *io, yajl_struct *yajl, yajl_handle hand)
1145 {
1146 int ret;
1147 struct values_tmp *vtmp = calloc(1, sizeof(struct values_tmp) * 1);
1148 if(!vtmp)
1149 {
1150 return -ENOMEM;
1151 }
1153 vtmp->vlist = (value_list_t)VALUE_LIST_INIT;
1154 sstrncpy(vtmp->vlist.host, hostname_g, sizeof(vtmp->vlist.host));
1155 sstrncpy(vtmp->vlist.plugin, "ceph", sizeof(vtmp->vlist.plugin));
1156 sstrncpy(vtmp->vlist.plugin_instance, io->d->name, sizeof(vtmp->vlist.plugin_instance));
1158 vtmp->d = io->d;
1159 vtmp->avgcount_exists = -1;
1160 vtmp->latency_index = 0;
1161 vtmp->index = 0;
1162 yajl->handler_arg = vtmp;
1163 ret = traverse_json(io->json, io->json_len, hand);
1164 sfree(vtmp);
1165 return ret;
1166 }
1168 /**
1169 * Initiate JSON parsing and print error if one occurs
1170 */
1171 static int cconn_process_json(struct cconn *io)
1172 {
1173 if((io->request_type != ASOK_REQ_DATA) &&
1174 (io->request_type != ASOK_REQ_SCHEMA))
1175 {
1176 return -EDOM;
1177 }
1179 int result = 1;
1180 yajl_handle hand;
1181 yajl_status status;
1183 hand = yajl_alloc(&callbacks,
1184 #if HAVE_YAJL_V2
1185 /* alloc funcs = */ NULL,
1186 #else
1187 /* alloc funcs = */ NULL, NULL,
1188 #endif
1189 /* context = */ (void *)(&io->yajl));
1191 if(!hand)
1192 {
1193 ERROR ("ceph plugin: yajl_alloc failed.");
1194 return ENOMEM;
1195 }
1197 io->yajl.depth = 0;
1199 switch(io->request_type)
1200 {
1201 case ASOK_REQ_DATA:
1202 io->yajl.handler = node_handler_fetch_data;
1203 result = cconn_process_data(io, &io->yajl, hand);
1204 break;
1205 case ASOK_REQ_SCHEMA:
1206 //init daemon specific variables
1207 io->d->ds_num = 0;
1208 io->d->last_idx = 0;
1209 io->d->last_poll_data = NULL;
1210 io->yajl.handler = node_handler_define_schema;
1211 io->yajl.handler_arg = io->d;
1212 result = traverse_json(io->json, io->json_len, hand);
1213 break;
1214 }
1216 if(result)
1217 {
1218 goto done;
1219 }
1221 #if HAVE_YAJL_V2
1222 status = yajl_complete_parse(hand);
1223 #else
1224 status = yajl_parse_complete(hand);
1225 #endif
1227 if (status != yajl_status_ok)
1228 {
1229 unsigned char *errmsg = yajl_get_error (hand, /* verbose = */ 0,
1230 /* jsonText = */ NULL, /* jsonTextLen = */ 0);
1231 ERROR ("ceph plugin: yajl_parse_complete failed: %s",
1232 (char *) errmsg);
1233 yajl_free_error (hand, errmsg);
1234 yajl_free (hand);
1235 return 1;
1236 }
1238 done:
1239 yajl_free (hand);
1240 return result;
1241 }
1243 static int cconn_validate_revents(struct cconn *io, int revents)
1244 {
1245 if(revents & POLLERR)
1246 {
1247 ERROR("ceph plugin: cconn_validate_revents(name=%s): got POLLERR",
1248 io->d->name);
1249 return -EIO;
1250 }
1251 switch (io->state)
1252 {
1253 case CSTATE_WRITE_REQUEST:
1254 return (revents & POLLOUT) ? 0 : -EINVAL;
1255 case CSTATE_READ_VERSION:
1256 case CSTATE_READ_AMT:
1257 case CSTATE_READ_JSON:
1258 return (revents & POLLIN) ? 0 : -EINVAL;
1259 default:
1260 ERROR("ceph plugin: cconn_validate_revents(name=%s) got to "
1261 "illegal state on line %d", io->d->name, __LINE__);
1262 return -EDOM;
1263 }
1264 }
1266 /** Handle a network event for a connection */
1267 static int cconn_handle_event(struct cconn *io)
1268 {
1269 int ret;
1270 switch (io->state)
1271 {
1272 case CSTATE_UNCONNECTED:
1273 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1274 "state on line %d", io->d->name, __LINE__);
1276 return -EDOM;
1277 case CSTATE_WRITE_REQUEST:
1278 {
1279 char cmd[32];
1280 snprintf(cmd, sizeof(cmd), "%s%d%s", "{ \"prefix\": \"",
1281 io->request_type, "\" }\n");
1282 size_t cmd_len = strlen(cmd);
1283 RETRY_ON_EINTR(ret,
1284 write(io->asok, ((char*)&cmd) + io->amt, cmd_len - io->amt));
1285 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,amt=%d,ret=%d)",
1286 io->d->name, io->state, io->amt, ret);
1287 if(ret < 0)
1288 {
1289 return ret;
1290 }
1291 io->amt += ret;
1292 if(io->amt >= cmd_len)
1293 {
1294 io->amt = 0;
1295 switch (io->request_type)
1296 {
1297 case ASOK_REQ_VERSION:
1298 io->state = CSTATE_READ_VERSION;
1299 break;
1300 default:
1301 io->state = CSTATE_READ_AMT;
1302 break;
1303 }
1304 }
1305 return 0;
1306 }
1307 case CSTATE_READ_VERSION:
1308 {
1309 RETRY_ON_EINTR(ret,
1310 read(io->asok, ((char*)(&io->d->version)) + io->amt,
1311 sizeof(io->d->version) - io->amt));
1312 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1313 io->d->name, io->state, ret);
1314 if(ret < 0)
1315 {
1316 return ret;
1317 }
1318 io->amt += ret;
1319 if(io->amt >= sizeof(io->d->version))
1320 {
1321 io->d->version = ntohl(io->d->version);
1322 if(io->d->version != 1)
1323 {
1324 ERROR("ceph plugin: cconn_handle_event(name=%s) not "
1325 "expecting version %d!", io->d->name, io->d->version);
1326 return -ENOTSUP;
1327 }
1328 DEBUG("ceph plugin: cconn_handle_event(name=%s): identified as "
1329 "version %d", io->d->name, io->d->version);
1330 io->amt = 0;
1331 cconn_close(io);
1332 io->request_type = ASOK_REQ_SCHEMA;
1333 }
1334 return 0;
1335 }
1336 case CSTATE_READ_AMT:
1337 {
1338 RETRY_ON_EINTR(ret,
1339 read(io->asok, ((char*)(&io->json_len)) + io->amt,
1340 sizeof(io->json_len) - io->amt));
1341 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1342 io->d->name, io->state, ret);
1343 if(ret < 0)
1344 {
1345 return ret;
1346 }
1347 io->amt += ret;
1348 if(io->amt >= sizeof(io->json_len))
1349 {
1350 io->json_len = ntohl(io->json_len);
1351 io->amt = 0;
1352 io->state = CSTATE_READ_JSON;
1353 io->json = calloc(1, io->json_len + 1);
1354 if(!io->json)
1355 {
1356 ERROR("ceph plugin: error callocing io->json");
1357 return -ENOMEM;
1358 }
1359 }
1360 return 0;
1361 }
1362 case CSTATE_READ_JSON:
1363 {
1364 RETRY_ON_EINTR(ret,
1365 read(io->asok, io->json + io->amt, io->json_len - io->amt));
1366 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1367 io->d->name, io->state, ret);
1368 if(ret < 0)
1369 {
1370 return ret;
1371 }
1372 io->amt += ret;
1373 if(io->amt >= io->json_len)
1374 {
1375 ret = cconn_process_json(io);
1376 if(ret)
1377 {
1378 return ret;
1379 }
1380 cconn_close(io);
1381 io->request_type = ASOK_REQ_NONE;
1382 }
1383 return 0;
1384 }
1385 default:
1386 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1387 "state on line %d", io->d->name, __LINE__);
1388 return -EDOM;
1389 }
1390 }
1392 static int cconn_prepare(struct cconn *io, struct pollfd* fds)
1393 {
1394 int ret;
1395 if(io->request_type == ASOK_REQ_NONE)
1396 {
1397 /* The request has already been serviced. */
1398 return 0;
1399 }
1400 else if((io->request_type == ASOK_REQ_DATA) && (io->d->ds_num == 0))
1401 {
1402 /* If there are no counters to report on, don't bother
1403 * connecting */
1404 return 0;
1405 }
1407 switch (io->state)
1408 {
1409 case CSTATE_UNCONNECTED:
1410 ret = cconn_connect(io);
1411 if(ret > 0)
1412 {
1413 return -ret;
1414 }
1415 else if(ret < 0)
1416 {
1417 return ret;
1418 }
1419 fds->fd = io->asok;
1420 fds->events = POLLOUT;
1421 return 1;
1422 case CSTATE_WRITE_REQUEST:
1423 fds->fd = io->asok;
1424 fds->events = POLLOUT;
1425 return 1;
1426 case CSTATE_READ_VERSION:
1427 case CSTATE_READ_AMT:
1428 case CSTATE_READ_JSON:
1429 fds->fd = io->asok;
1430 fds->events = POLLIN;
1431 return 1;
1432 default:
1433 ERROR("ceph plugin: cconn_prepare(name=%s) got to illegal state "
1434 "on line %d", io->d->name, __LINE__);
1435 return -EDOM;
1436 }
1437 }
1439 /** Returns the difference between two struct timevals in milliseconds.
1440 * On overflow, we return max/min int.
1441 */
1442 static int milli_diff(const struct timeval *t1, const struct timeval *t2)
1443 {
1444 int64_t ret;
1445 int sec_diff = t1->tv_sec - t2->tv_sec;
1446 int usec_diff = t1->tv_usec - t2->tv_usec;
1447 ret = usec_diff / 1000;
1448 ret += (sec_diff * 1000);
1449 return (ret > INT_MAX) ? INT_MAX : ((ret < INT_MIN) ? INT_MIN : (int)ret);
1450 }
1452 /** This handles the actual network I/O to talk to the Ceph daemons.
1453 */
1454 static int cconn_main_loop(uint32_t request_type)
1455 {
1456 int ret, some_unreachable = 0;
1457 struct timeval end_tv;
1458 struct cconn io_array[g_num_daemons];
1460 DEBUG("ceph plugin: entering cconn_main_loop(request_type = %d)", request_type);
1462 /* create cconn array */
1463 memset(io_array, 0, sizeof(io_array));
1464 for(int i = 0; i < g_num_daemons; ++i)
1465 {
1466 io_array[i].d = g_daemons[i];
1467 io_array[i].request_type = request_type;
1468 io_array[i].state = CSTATE_UNCONNECTED;
1469 }
1471 /** Calculate the time at which we should give up */
1472 gettimeofday(&end_tv, NULL);
1473 end_tv.tv_sec += CEPH_TIMEOUT_INTERVAL;
1475 while (1)
1476 {
1477 int nfds, diff;
1478 struct timeval tv;
1479 struct cconn *polled_io_array[g_num_daemons];
1480 struct pollfd fds[g_num_daemons];
1481 memset(fds, 0, sizeof(fds));
1482 nfds = 0;
1483 for(int i = 0; i < g_num_daemons; ++i)
1484 {
1485 struct cconn *io = io_array + i;
1486 ret = cconn_prepare(io, fds + nfds);
1487 if(ret < 0)
1488 {
1489 WARNING("ceph plugin: cconn_prepare(name=%s,i=%d,st=%d)=%d",
1490 io->d->name, i, io->state, ret);
1491 cconn_close(io);
1492 io->request_type = ASOK_REQ_NONE;
1493 some_unreachable = 1;
1494 }
1495 else if(ret == 1)
1496 {
1497 polled_io_array[nfds++] = io_array + i;
1498 }
1499 }
1500 if(nfds == 0)
1501 {
1502 /* finished */
1503 ret = 0;
1504 goto done;
1505 }
1506 gettimeofday(&tv, NULL);
1507 diff = milli_diff(&end_tv, &tv);
1508 if(diff <= 0)
1509 {
1510 /* Timed out */
1511 ret = -ETIMEDOUT;
1512 WARNING("ceph plugin: cconn_main_loop: timed out.");
1513 goto done;
1514 }
1515 RETRY_ON_EINTR(ret, poll(fds, nfds, diff));
1516 if(ret < 0)
1517 {
1518 ERROR("ceph plugin: poll(2) error: %d", ret);
1519 goto done;
1520 }
1521 for(int i = 0; i < nfds; ++i)
1522 {
1523 struct cconn *io = polled_io_array[i];
1524 int revents = fds[i].revents;
1525 if(revents == 0)
1526 {
1527 /* do nothing */
1528 }
1529 else if(cconn_validate_revents(io, revents))
1530 {
1531 WARNING("ceph plugin: cconn(name=%s,i=%d,st=%d): "
1532 "revents validation error: "
1533 "revents=0x%08x", io->d->name, i, io->state, revents);
1534 cconn_close(io);
1535 io->request_type = ASOK_REQ_NONE;
1536 some_unreachable = 1;
1537 }
1538 else
1539 {
1540 ret = cconn_handle_event(io);
1541 if(ret)
1542 {
1543 WARNING("ceph plugin: cconn_handle_event(name=%s,"
1544 "i=%d,st=%d): error %d", io->d->name, i, io->state, ret);
1545 cconn_close(io);
1546 io->request_type = ASOK_REQ_NONE;
1547 some_unreachable = 1;
1548 }
1549 }
1550 }
1551 }
1552 done: for(int i = 0; i < g_num_daemons; ++i)
1553 {
1554 cconn_close(io_array + i);
1555 }
1556 if(some_unreachable)
1557 {
1558 DEBUG("ceph plugin: cconn_main_loop: some Ceph daemons were unreachable.");
1559 }
1560 else
1561 {
1562 DEBUG("ceph plugin: cconn_main_loop: reached all Ceph daemons :)");
1563 }
1564 return ret;
1565 }
1567 static int ceph_read(void)
1568 {
1569 return cconn_main_loop(ASOK_REQ_DATA);
1570 }
1572 /******* lifecycle *******/
1573 static int ceph_init(void)
1574 {
1575 int ret;
1576 ceph_daemons_print();
1578 ret = cconn_main_loop(ASOK_REQ_VERSION);
1580 return (ret) ? ret : 0;
1581 }
1583 static int ceph_shutdown(void)
1584 {
1585 for(int i = 0; i < g_num_daemons; ++i)
1586 {
1587 ceph_daemon_free(g_daemons[i]);
1588 }
1589 sfree(g_daemons);
1590 g_daemons = NULL;
1591 g_num_daemons = 0;
1592 DEBUG("ceph plugin: finished ceph_shutdown");
1593 return 0;
1594 }
1596 void module_register(void)
1597 {
1598 plugin_register_complex_config("ceph", ceph_config);
1599 plugin_register_init("ceph", ceph_init);
1600 plugin_register_read("ceph", ceph_read);
1601 plugin_register_shutdown("ceph", ceph_shutdown);
1602 }
1603 /* vim: set sw=4 sts=4 et : */