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 size_t i;
274 int status;
276 key[0] = '\0';
277 memcpy(buffer, number_val, number_len);
278 buffer[sizeof(buffer) - 1] = '\0';
280 for (i = 0; i < state->depth; i++)
281 {
282 if (state->stack[i] == NULL)
283 continue;
285 if (strlen (key) != 0)
286 BUFFER_ADD (key, ".");
287 BUFFER_ADD (key, state->stack[i]);
288 }
290 /* Special case for latency metrics. */
291 if ((strcmp ("avgcount", state->key) == 0)
292 || (strcmp ("sum", state->key) == 0))
293 {
294 latency_type = 1;
296 /* Super-special case for filestore.journal_wr_bytes.avgcount: For
297 * some reason, Ceph schema encodes this as a count/sum pair while all
298 * other "Bytes" data (excluding used/capacity bytes for OSD space) uses
299 * a single "Derive" type. To spare further confusion, keep this KPI as
300 * the same type of other "Bytes". Instead of keeping an "average" or
301 * "rate", use the "sum" in the pair and assign that to the derive
302 * value. */
303 if (convert_special_metrics && (state->depth >= 2)
304 && (strcmp("filestore", state->stack[state->depth - 2]) == 0)
305 && (strcmp("journal_wr_bytes", state->stack[state->depth - 1]) == 0)
306 && (strcmp("avgcount", state->key) == 0))
307 {
308 DEBUG("ceph plugin: Skipping avgcount for filestore.JournalWrBytes");
309 return CEPH_CB_CONTINUE;
310 }
311 }
312 else /* not a latency type */
313 {
314 BUFFER_ADD (key, ".");
315 BUFFER_ADD (key, state->key);
316 }
318 status = state->handler(state->handler_arg, buffer, key);
319 if((status == RETRY_AVGCOUNT) && latency_type)
320 {
321 /* Add previously skipped part of the key, either "avgcount" or "sum",
322 * and try again. */
323 BUFFER_ADD (key, ".");
324 BUFFER_ADD (key, state->key);
326 status = state->handler(state->handler_arg, buffer, key);
327 }
329 if (status != 0)
330 {
331 ERROR("ceph plugin: JSON handler failed with status %d.", status);
332 return CEPH_CB_ABORT;
333 }
335 return CEPH_CB_CONTINUE;
336 }
338 static int ceph_cb_string(void *ctx, const unsigned char *string_val,
339 yajl_len_t string_len)
340 {
341 return CEPH_CB_CONTINUE;
342 }
344 static int ceph_cb_start_map(void *ctx)
345 {
346 yajl_struct *state = (yajl_struct*) ctx;
348 /* Push key to the stack */
349 if (state->depth == YAJL_MAX_DEPTH)
350 return CEPH_CB_ABORT;
352 state->stack[state->depth] = state->key;
353 state->depth++;
354 state->key = NULL;
356 return CEPH_CB_CONTINUE;
357 }
359 static int ceph_cb_end_map(void *ctx)
360 {
361 yajl_struct *state = (yajl_struct*) ctx;
363 /* Pop key from the stack */
364 if (state->depth == 0)
365 return CEPH_CB_ABORT;
367 sfree (state->key);
368 state->depth--;
369 state->key = state->stack[state->depth];
370 state->stack[state->depth] = NULL;
372 return CEPH_CB_CONTINUE;
373 }
375 static int
376 ceph_cb_map_key(void *ctx, const unsigned char *key, yajl_len_t string_len)
377 {
378 yajl_struct *state = (yajl_struct*) ctx;
379 size_t sz = ((size_t) string_len) + 1;
381 sfree (state->key);
382 state->key = malloc (sz);
383 if (state->key == NULL)
384 {
385 ERROR ("ceph plugin: malloc failed.");
386 return CEPH_CB_ABORT;
387 }
389 memmove (state->key, key, sz - 1);
390 state->key[sz - 1] = 0;
392 return CEPH_CB_CONTINUE;
393 }
395 static int ceph_cb_start_array(void *ctx)
396 {
397 return CEPH_CB_CONTINUE;
398 }
400 static int ceph_cb_end_array(void *ctx)
401 {
402 return CEPH_CB_CONTINUE;
403 }
405 static yajl_callbacks callbacks = {
406 ceph_cb_null,
407 ceph_cb_boolean,
408 NULL,
409 NULL,
410 ceph_cb_number,
411 ceph_cb_string,
412 ceph_cb_start_map,
413 ceph_cb_map_key,
414 ceph_cb_end_map,
415 ceph_cb_start_array,
416 ceph_cb_end_array
417 };
419 static void ceph_daemon_print(const struct ceph_daemon *d)
420 {
421 DEBUG("ceph plugin: name=%s, asok_path=%s", d->name, d->asok_path);
422 }
424 static void ceph_daemons_print(void)
425 {
426 int i;
427 for(i = 0; i < g_num_daemons; ++i)
428 {
429 ceph_daemon_print(g_daemons[i]);
430 }
431 }
433 static void ceph_daemon_free(struct ceph_daemon *d)
434 {
435 int i = 0;
436 for(; i < d->last_idx; i++)
437 {
438 sfree(d->last_poll_data[i]);
439 }
440 sfree(d->last_poll_data);
441 d->last_poll_data = NULL;
442 d->last_idx = 0;
443 for(i = 0; i < d->ds_num; i++)
444 {
445 sfree(d->ds_names[i]);
446 }
447 sfree(d->ds_types);
448 sfree(d->ds_names);
449 sfree(d);
450 }
452 /* compact_ds_name removed the special characters ":", "_", "-" and "+" from the
453 * intput string. Characters following these special characters are capitalized.
454 * Trailing "+" and "-" characters are replaces with the strings "Plus" and
455 * "Minus". */
456 static int compact_ds_name (char *buffer, size_t buffer_size, char const *src)
457 {
458 char *src_copy;
459 size_t src_len;
460 char *ptr = buffer;
461 size_t ptr_size = buffer_size;
462 _Bool append_plus = 0;
463 _Bool append_minus = 0;
465 if ((buffer == NULL) || (buffer_size <= strlen ("Minus")) || (src == NULL))
466 return EINVAL;
468 src_copy = strdup (src);
469 src_len = strlen(src);
471 /* Remove trailing "+" and "-". */
472 if (src_copy[src_len - 1] == '+')
473 {
474 append_plus = 1;
475 src_len--;
476 src_copy[src_len] = 0;
477 }
478 else if (src_copy[src_len - 1] == '-')
479 {
480 append_minus = 1;
481 src_len--;
482 src_copy[src_len] = 0;
483 }
485 /* Split at special chars, capitalize first character, append to buffer. */
486 char *dummy = src_copy;
487 char *token;
488 char *save_ptr = NULL;
489 while ((token = strtok_r (dummy, ":_-+", &save_ptr)) != NULL)
490 {
491 size_t len;
493 dummy = NULL;
495 token[0] = toupper ((int) token[0]);
497 assert (ptr_size > 1);
499 len = strlen (token);
500 if (len >= ptr_size)
501 len = ptr_size - 1;
503 assert (len > 0);
504 assert (len < ptr_size);
506 sstrncpy (ptr, token, len + 1);
507 ptr += len;
508 ptr_size -= len;
510 assert (*ptr == 0);
511 if (ptr_size <= 1)
512 break;
513 }
515 /* Append "Plus" or "Minus" if "+" or "-" has been stripped above. */
516 if (append_plus || append_minus)
517 {
518 char const *append = "Plus";
519 if (append_minus)
520 append = "Minus";
522 size_t offset = buffer_size - (strlen (append) + 1);
523 if (offset > strlen (buffer))
524 offset = strlen (buffer);
526 sstrncpy (buffer + offset, append, buffer_size - offset);
527 }
529 sfree (src_copy);
530 return 0;
531 }
533 static _Bool has_suffix (char const *str, char const *suffix)
534 {
535 size_t str_len = strlen (str);
536 size_t suffix_len = strlen (suffix);
537 size_t offset;
539 if (suffix_len > str_len)
540 return 0;
541 offset = str_len - suffix_len;
543 if (strcmp (str + offset, suffix) == 0)
544 return 1;
546 return 0;
547 }
549 /* count_parts returns the number of elements a "foo.bar.baz" style key has. */
550 static size_t count_parts (char const *key)
551 {
552 char const *ptr;
553 size_t parts_num = 0;
555 for (ptr = key; ptr != NULL; ptr = strchr (ptr + 1, '.'))
556 parts_num++;
558 return parts_num;
559 }
561 /**
562 * Parse key to remove "type" if this is for schema and initiate compaction
563 */
564 static int parse_keys (char *buffer, size_t buffer_size, const char *key_str)
565 {
566 char tmp[2 * buffer_size];
568 if (buffer == NULL || buffer_size == 0 || key_str == NULL || strlen (key_str) == 0)
569 return EINVAL;
571 if ((count_parts (key_str) > 2) && has_suffix (key_str, ".type"))
572 {
573 /* strip ".type" suffix iff the key has more than two parts. */
574 size_t sz = strlen (key_str) - strlen (".type") + 1;
576 if (sz > sizeof (tmp))
577 sz = sizeof (tmp);
578 sstrncpy (tmp, key_str, sz);
579 }
580 else
581 {
582 sstrncpy (tmp, key_str, sizeof (tmp));
583 }
585 return compact_ds_name (buffer, buffer_size, tmp);
586 }
588 /**
589 * while parsing ceph admin socket schema, save counter name and type for later
590 * data processing
591 */
592 static int ceph_daemon_add_ds_entry(struct ceph_daemon *d, const char *name,
593 int pc_type)
594 {
595 uint32_t type;
596 char ds_name[DATA_MAX_NAME_LEN];
598 if(convert_special_metrics)
599 {
600 /**
601 * Special case for filestore:JournalWrBytes. For some reason, Ceph
602 * schema encodes this as a count/sum pair while all other "Bytes" data
603 * (excluding used/capacity bytes for OSD space) uses a single "Derive"
604 * type. To spare further confusion, keep this KPI as the same type of
605 * other "Bytes". Instead of keeping an "average" or "rate", use the
606 * "sum" in the pair and assign that to the derive value.
607 */
608 if((strcmp(name,"filestore.journal_wr_bytes.type") == 0))
609 {
610 pc_type = 10;
611 }
612 }
614 d->ds_names = realloc(d->ds_names, sizeof(char *) * (d->ds_num + 1));
615 if(!d->ds_names)
616 {
617 return -ENOMEM;
618 }
620 d->ds_types = realloc(d->ds_types, sizeof(uint32_t) * (d->ds_num + 1));
621 if(!d->ds_types)
622 {
623 return -ENOMEM;
624 }
626 d->ds_names[d->ds_num] = malloc(DATA_MAX_NAME_LEN);
627 if(!d->ds_names[d->ds_num])
628 {
629 return -ENOMEM;
630 }
632 type = (pc_type & PERFCOUNTER_DERIVE) ? DSET_RATE :
633 ((pc_type & PERFCOUNTER_LATENCY) ? DSET_LATENCY : DSET_BYTES);
634 d->ds_types[d->ds_num] = type;
636 if (parse_keys(ds_name, sizeof (ds_name), name))
637 {
638 return 1;
639 }
641 sstrncpy(d->ds_names[d->ds_num], ds_name, DATA_MAX_NAME_LEN -1);
642 d->ds_num = (d->ds_num + 1);
644 return 0;
645 }
647 /******* ceph_config *******/
648 static int cc_handle_str(struct oconfig_item_s *item, char *dest, int dest_len)
649 {
650 const char *val;
651 if(item->values_num != 1)
652 {
653 return -ENOTSUP;
654 }
655 if(item->values[0].type != OCONFIG_TYPE_STRING)
656 {
657 return -ENOTSUP;
658 }
659 val = item->values[0].value.string;
660 if(snprintf(dest, dest_len, "%s", val) > (dest_len - 1))
661 {
662 ERROR("ceph plugin: configuration parameter '%s' is too long.\n",
663 item->key);
664 return -ENAMETOOLONG;
665 }
666 return 0;
667 }
669 static int cc_handle_bool(struct oconfig_item_s *item, int *dest)
670 {
671 if(item->values_num != 1)
672 {
673 return -ENOTSUP;
674 }
676 if(item->values[0].type != OCONFIG_TYPE_BOOLEAN)
677 {
678 return -ENOTSUP;
679 }
681 *dest = (item->values[0].value.boolean) ? 1 : 0;
682 return 0;
683 }
685 static int cc_add_daemon_config(oconfig_item_t *ci)
686 {
687 int ret, i;
688 struct ceph_daemon *nd, cd = { 0 };
689 struct ceph_daemon **tmp;
691 if((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
692 {
693 WARNING("ceph plugin: `Daemon' blocks need exactly one string "
694 "argument.");
695 return (-1);
696 }
698 ret = cc_handle_str(ci, cd.name, DATA_MAX_NAME_LEN);
699 if(ret)
700 {
701 return ret;
702 }
704 for(i=0; i < ci->children_num; i++)
705 {
706 oconfig_item_t *child = ci->children + i;
708 if(strcasecmp("SocketPath", child->key) == 0)
709 {
710 ret = cc_handle_str(child, cd.asok_path, sizeof(cd.asok_path));
711 if(ret)
712 {
713 return ret;
714 }
715 }
716 else
717 {
718 WARNING("ceph plugin: ignoring unknown option %s", child->key);
719 }
720 }
721 if(cd.name[0] == '\0')
722 {
723 ERROR("ceph plugin: you must configure a daemon name.\n");
724 return -EINVAL;
725 }
726 else if(cd.asok_path[0] == '\0')
727 {
728 ERROR("ceph plugin(name=%s): you must configure an administrative "
729 "socket path.\n", cd.name);
730 return -EINVAL;
731 }
732 else if(!((cd.asok_path[0] == '/') ||
733 (cd.asok_path[0] == '.' && cd.asok_path[1] == '/')))
734 {
735 ERROR("ceph plugin(name=%s): administrative socket paths must begin "
736 "with '/' or './' Can't parse: '%s'\n", cd.name, cd.asok_path);
737 return -EINVAL;
738 }
740 tmp = realloc(g_daemons, (g_num_daemons+1) * sizeof(*g_daemons));
741 if(tmp == NULL)
742 {
743 /* The positive return value here indicates that this is a
744 * runtime error, not a configuration error. */
745 return ENOMEM;
746 }
747 g_daemons = tmp;
749 nd = malloc(sizeof (*nd));
750 if(!nd)
751 {
752 return ENOMEM;
753 }
754 memcpy(nd, &cd, sizeof(*nd));
755 g_daemons[g_num_daemons++] = nd;
756 return 0;
757 }
759 static int ceph_config(oconfig_item_t *ci)
760 {
761 int ret, i;
763 for(i = 0; i < ci->children_num; ++i)
764 {
765 oconfig_item_t *child = ci->children + i;
766 if(strcasecmp("Daemon", child->key) == 0)
767 {
768 ret = cc_add_daemon_config(child);
769 if(ret == ENOMEM)
770 {
771 ERROR("ceph plugin: Couldn't allocate memory");
772 return ret;
773 }
774 else if(ret)
775 {
776 //process other daemons and ignore this one
777 continue;
778 }
779 }
780 else if(strcasecmp("LongRunAvgLatency", child->key) == 0)
781 {
782 ret = cc_handle_bool(child, &long_run_latency_avg);
783 if(ret)
784 {
785 return ret;
786 }
787 }
788 else if(strcasecmp("ConvertSpecialMetricTypes", child->key) == 0)
789 {
790 ret = cc_handle_bool(child, &convert_special_metrics);
791 if(ret)
792 {
793 return ret;
794 }
795 }
796 else
797 {
798 WARNING("ceph plugin: ignoring unknown option %s", child->key);
799 }
800 }
801 return 0;
802 }
804 /**
805 * Parse JSON and get error message if present
806 */
807 static int
808 traverse_json(const unsigned char *json, uint32_t json_len, yajl_handle hand)
809 {
810 yajl_status status = yajl_parse(hand, json, json_len);
811 unsigned char *msg;
813 switch(status)
814 {
815 case yajl_status_error:
816 msg = yajl_get_error(hand, /* verbose = */ 1,
817 /* jsonText = */ (unsigned char *) json,
818 (unsigned int) json_len);
819 ERROR ("ceph plugin: yajl_parse failed: %s", msg);
820 yajl_free_error(hand, msg);
821 return 1;
822 case yajl_status_client_canceled:
823 return 1;
824 default:
825 return 0;
826 }
827 }
829 /**
830 * Add entry for each counter while parsing schema
831 */
832 static int
833 node_handler_define_schema(void *arg, const char *val, const char *key)
834 {
835 struct ceph_daemon *d = (struct ceph_daemon *) arg;
836 int pc_type;
837 pc_type = atoi(val);
838 return ceph_daemon_add_ds_entry(d, key, pc_type);
839 }
841 /**
842 * Latency counter does not yet have an entry in last poll data - add it.
843 */
844 static int add_last(struct ceph_daemon *d, const char *ds_n, double cur_sum,
845 uint64_t cur_count)
846 {
847 d->last_poll_data[d->last_idx] = malloc(sizeof (*d->last_poll_data[d->last_idx]));
848 if(!d->last_poll_data[d->last_idx])
849 {
850 return -ENOMEM;
851 }
852 sstrncpy(d->last_poll_data[d->last_idx]->ds_name,ds_n,
853 sizeof(d->last_poll_data[d->last_idx]->ds_name));
854 d->last_poll_data[d->last_idx]->last_sum = cur_sum;
855 d->last_poll_data[d->last_idx]->last_count = cur_count;
856 d->last_idx = (d->last_idx + 1);
857 return 0;
858 }
860 /**
861 * Update latency counter or add new entry if it doesn't exist
862 */
863 static int update_last(struct ceph_daemon *d, const char *ds_n, int index,
864 double cur_sum, uint64_t cur_count)
865 {
866 if((d->last_idx > index) && (strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0))
867 {
868 d->last_poll_data[index]->last_sum = cur_sum;
869 d->last_poll_data[index]->last_count = cur_count;
870 return 0;
871 }
873 if(!d->last_poll_data)
874 {
875 d->last_poll_data = malloc(sizeof (*d->last_poll_data));
876 if(!d->last_poll_data)
877 {
878 return -ENOMEM;
879 }
880 }
881 else
882 {
883 struct last_data **tmp_last = realloc(d->last_poll_data,
884 ((d->last_idx+1) * sizeof(struct last_data *)));
885 if(!tmp_last)
886 {
887 return -ENOMEM;
888 }
889 d->last_poll_data = tmp_last;
890 }
891 return add_last(d, ds_n, cur_sum, cur_count);
892 }
894 /**
895 * If using index guess failed (shouldn't happen, but possible if counters
896 * get rearranged), resort to searching for counter name
897 */
898 static int backup_search_for_last_avg(struct ceph_daemon *d, const char *ds_n)
899 {
900 int i = 0;
901 for(; i < d->last_idx; i++)
902 {
903 if(strcmp(d->last_poll_data[i]->ds_name, ds_n) == 0)
904 {
905 return i;
906 }
907 }
908 return -1;
909 }
911 /**
912 * Calculate average b/t current data and last poll data
913 * if last poll data exists
914 */
915 static double get_last_avg(struct ceph_daemon *d, const char *ds_n, int index,
916 double cur_sum, uint64_t cur_count)
917 {
918 double result = -1.1, sum_delt = 0.0;
919 uint64_t count_delt = 0;
920 int tmp_index = 0;
921 if(d->last_idx > index)
922 {
923 if(strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0)
924 {
925 tmp_index = index;
926 }
927 //test previous index
928 else if((index > 0) && (strcmp(d->last_poll_data[index-1]->ds_name, ds_n) == 0))
929 {
930 tmp_index = (index - 1);
931 }
932 else
933 {
934 tmp_index = backup_search_for_last_avg(d, ds_n);
935 }
937 if((tmp_index > -1) && (cur_count > d->last_poll_data[tmp_index]->last_count))
938 {
939 sum_delt = (cur_sum - d->last_poll_data[tmp_index]->last_sum);
940 count_delt = (cur_count - d->last_poll_data[tmp_index]->last_count);
941 result = (sum_delt / count_delt);
942 }
943 }
945 if(result == -1.1)
946 {
947 result = NAN;
948 }
949 if(update_last(d, ds_n, tmp_index, cur_sum, cur_count) == -ENOMEM)
950 {
951 return -ENOMEM;
952 }
953 return result;
954 }
956 /**
957 * If using index guess failed, resort to searching for counter name
958 */
959 static uint32_t backup_search_for_type(struct ceph_daemon *d, char *ds_name)
960 {
961 int idx = 0;
962 for(; idx < d->ds_num; idx++)
963 {
964 if(strcmp(d->ds_names[idx], ds_name) == 0)
965 {
966 return d->ds_types[idx];
967 }
968 }
969 return DSET_TYPE_UNFOUND;
970 }
972 /**
973 * Process counter data and dispatch values
974 */
975 static int node_handler_fetch_data(void *arg, const char *val, const char *key)
976 {
977 value_t uv;
978 double tmp_d;
979 uint64_t tmp_u;
980 struct values_tmp *vtmp = (struct values_tmp*) arg;
981 uint32_t type = DSET_TYPE_UNFOUND;
982 int index = vtmp->index;
984 char ds_name[DATA_MAX_NAME_LEN];
986 if (parse_keys (ds_name, sizeof (ds_name), key))
987 {
988 return 1;
989 }
991 if(index >= vtmp->d->ds_num)
992 {
993 //don't overflow bounds of array
994 index = (vtmp->d->ds_num - 1);
995 }
997 /**
998 * counters should remain in same order we parsed schema... we maintain the
999 * index variable to keep track of current point in list of counters. first
1000 * use index to guess point in array for retrieving type. if that doesn't
1001 * work, use the old way to get the counter type
1002 */
1003 if(strcmp(ds_name, vtmp->d->ds_names[index]) == 0)
1004 {
1005 //found match
1006 type = vtmp->d->ds_types[index];
1007 }
1008 else if((index > 0) && (strcmp(ds_name, vtmp->d->ds_names[index-1]) == 0))
1009 {
1010 //try previous key
1011 type = vtmp->d->ds_types[index-1];
1012 }
1014 if(type == DSET_TYPE_UNFOUND)
1015 {
1016 //couldn't find right type by guessing, check the old way
1017 type = backup_search_for_type(vtmp->d, ds_name);
1018 }
1020 switch(type)
1021 {
1022 case DSET_LATENCY:
1023 if(vtmp->avgcount_exists == -1)
1024 {
1025 sscanf(val, "%" PRIu64, &vtmp->avgcount);
1026 vtmp->avgcount_exists = 0;
1027 //return after saving avgcount - don't dispatch value
1028 //until latency calculation
1029 return 0;
1030 }
1031 else
1032 {
1033 double sum, result;
1034 sscanf(val, "%lf", &sum);
1036 if(vtmp->avgcount == 0)
1037 {
1038 vtmp->avgcount = 1;
1039 }
1041 /** User wants latency values as long run avg */
1042 if(long_run_latency_avg)
1043 {
1044 result = (sum / vtmp->avgcount);
1045 }
1046 else
1047 {
1048 result = get_last_avg(vtmp->d, ds_name, vtmp->latency_index, sum, vtmp->avgcount);
1049 if(result == -ENOMEM)
1050 {
1051 return -ENOMEM;
1052 }
1053 }
1055 uv.gauge = result;
1056 vtmp->avgcount_exists = -1;
1057 vtmp->latency_index = (vtmp->latency_index + 1);
1058 }
1059 break;
1060 case DSET_BYTES:
1061 sscanf(val, "%lf", &tmp_d);
1062 uv.gauge = tmp_d;
1063 break;
1064 case DSET_RATE:
1065 sscanf(val, "%" PRIu64, &tmp_u);
1066 uv.derive = tmp_u;
1067 break;
1068 case DSET_TYPE_UNFOUND:
1069 default:
1070 ERROR("ceph plugin: ds %s was not properly initialized.", ds_name);
1071 return -1;
1072 }
1074 sstrncpy(vtmp->vlist.type, ceph_dset_types[type], sizeof(vtmp->vlist.type));
1075 sstrncpy(vtmp->vlist.type_instance, ds_name, sizeof(vtmp->vlist.type_instance));
1076 vtmp->vlist.values = &uv;
1077 vtmp->vlist.values_len = 1;
1079 vtmp->index = (vtmp->index + 1);
1080 plugin_dispatch_values(&vtmp->vlist);
1082 return 0;
1083 }
1085 static int cconn_connect(struct cconn *io)
1086 {
1087 struct sockaddr_un address = { 0 };
1088 int flags, fd, err;
1089 if(io->state != CSTATE_UNCONNECTED)
1090 {
1091 ERROR("ceph plugin: cconn_connect: io->state != CSTATE_UNCONNECTED");
1092 return -EDOM;
1093 }
1094 fd = socket(PF_UNIX, SOCK_STREAM, 0);
1095 if(fd < 0)
1096 {
1097 err = -errno;
1098 ERROR("ceph plugin: cconn_connect: socket(PF_UNIX, SOCK_STREAM, 0) "
1099 "failed: error %d", err);
1100 return err;
1101 }
1102 address.sun_family = AF_UNIX;
1103 snprintf(address.sun_path, sizeof(address.sun_path), "%s",
1104 io->d->asok_path);
1105 RETRY_ON_EINTR(err,
1106 connect(fd, (struct sockaddr *) &address, sizeof(struct sockaddr_un)));
1107 if(err < 0)
1108 {
1109 ERROR("ceph plugin: cconn_connect: connect(%d) failed: error %d",
1110 fd, err);
1111 close(fd);
1112 return err;
1113 }
1115 flags = fcntl(fd, F_GETFL, 0);
1116 if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) != 0)
1117 {
1118 err = -errno;
1119 ERROR("ceph plugin: cconn_connect: fcntl(%d, O_NONBLOCK) error %d",
1120 fd, err);
1121 close(fd);
1122 return err;
1123 }
1124 io->asok = fd;
1125 io->state = CSTATE_WRITE_REQUEST;
1126 io->amt = 0;
1127 io->json_len = 0;
1128 io->json = NULL;
1129 return 0;
1130 }
1132 static void cconn_close(struct cconn *io)
1133 {
1134 io->state = CSTATE_UNCONNECTED;
1135 if(io->asok != -1)
1136 {
1137 int res;
1138 RETRY_ON_EINTR(res, close(io->asok));
1139 }
1140 io->asok = -1;
1141 io->amt = 0;
1142 io->json_len = 0;
1143 sfree(io->json);
1144 io->json = NULL;
1145 }
1147 /* Process incoming JSON counter data */
1148 static int
1149 cconn_process_data(struct cconn *io, yajl_struct *yajl, yajl_handle hand)
1150 {
1151 int ret;
1152 struct values_tmp *vtmp = calloc(1, sizeof(struct values_tmp) * 1);
1153 if(!vtmp)
1154 {
1155 return -ENOMEM;
1156 }
1158 vtmp->vlist = (value_list_t)VALUE_LIST_INIT;
1159 sstrncpy(vtmp->vlist.host, hostname_g, sizeof(vtmp->vlist.host));
1160 sstrncpy(vtmp->vlist.plugin, "ceph", sizeof(vtmp->vlist.plugin));
1161 sstrncpy(vtmp->vlist.plugin_instance, io->d->name, sizeof(vtmp->vlist.plugin_instance));
1163 vtmp->d = io->d;
1164 vtmp->avgcount_exists = -1;
1165 vtmp->latency_index = 0;
1166 vtmp->index = 0;
1167 yajl->handler_arg = vtmp;
1168 ret = traverse_json(io->json, io->json_len, hand);
1169 sfree(vtmp);
1170 return ret;
1171 }
1173 /**
1174 * Initiate JSON parsing and print error if one occurs
1175 */
1176 static int cconn_process_json(struct cconn *io)
1177 {
1178 if((io->request_type != ASOK_REQ_DATA) &&
1179 (io->request_type != ASOK_REQ_SCHEMA))
1180 {
1181 return -EDOM;
1182 }
1184 int result = 1;
1185 yajl_handle hand;
1186 yajl_status status;
1188 hand = yajl_alloc(&callbacks,
1189 #if HAVE_YAJL_V2
1190 /* alloc funcs = */ NULL,
1191 #else
1192 /* alloc funcs = */ NULL, NULL,
1193 #endif
1194 /* context = */ (void *)(&io->yajl));
1196 if(!hand)
1197 {
1198 ERROR ("ceph plugin: yajl_alloc failed.");
1199 return ENOMEM;
1200 }
1202 io->yajl.depth = 0;
1204 switch(io->request_type)
1205 {
1206 case ASOK_REQ_DATA:
1207 io->yajl.handler = node_handler_fetch_data;
1208 result = cconn_process_data(io, &io->yajl, hand);
1209 break;
1210 case ASOK_REQ_SCHEMA:
1211 //init daemon specific variables
1212 io->d->ds_num = 0;
1213 io->d->last_idx = 0;
1214 io->d->last_poll_data = NULL;
1215 io->yajl.handler = node_handler_define_schema;
1216 io->yajl.handler_arg = io->d;
1217 result = traverse_json(io->json, io->json_len, hand);
1218 break;
1219 }
1221 if(result)
1222 {
1223 goto done;
1224 }
1226 #if HAVE_YAJL_V2
1227 status = yajl_complete_parse(hand);
1228 #else
1229 status = yajl_parse_complete(hand);
1230 #endif
1232 if (status != yajl_status_ok)
1233 {
1234 unsigned char *errmsg = yajl_get_error (hand, /* verbose = */ 0,
1235 /* jsonText = */ NULL, /* jsonTextLen = */ 0);
1236 ERROR ("ceph plugin: yajl_parse_complete failed: %s",
1237 (char *) errmsg);
1238 yajl_free_error (hand, errmsg);
1239 yajl_free (hand);
1240 return 1;
1241 }
1243 done:
1244 yajl_free (hand);
1245 return result;
1246 }
1248 static int cconn_validate_revents(struct cconn *io, int revents)
1249 {
1250 if(revents & POLLERR)
1251 {
1252 ERROR("ceph plugin: cconn_validate_revents(name=%s): got POLLERR",
1253 io->d->name);
1254 return -EIO;
1255 }
1256 switch (io->state)
1257 {
1258 case CSTATE_WRITE_REQUEST:
1259 return (revents & POLLOUT) ? 0 : -EINVAL;
1260 case CSTATE_READ_VERSION:
1261 case CSTATE_READ_AMT:
1262 case CSTATE_READ_JSON:
1263 return (revents & POLLIN) ? 0 : -EINVAL;
1264 default:
1265 ERROR("ceph plugin: cconn_validate_revents(name=%s) got to "
1266 "illegal state on line %d", io->d->name, __LINE__);
1267 return -EDOM;
1268 }
1269 }
1271 /** Handle a network event for a connection */
1272 static int cconn_handle_event(struct cconn *io)
1273 {
1274 int ret;
1275 switch (io->state)
1276 {
1277 case CSTATE_UNCONNECTED:
1278 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1279 "state on line %d", io->d->name, __LINE__);
1281 return -EDOM;
1282 case CSTATE_WRITE_REQUEST:
1283 {
1284 char cmd[32];
1285 snprintf(cmd, sizeof(cmd), "%s%d%s", "{ \"prefix\": \"",
1286 io->request_type, "\" }\n");
1287 size_t cmd_len = strlen(cmd);
1288 RETRY_ON_EINTR(ret,
1289 write(io->asok, ((char*)&cmd) + io->amt, cmd_len - io->amt));
1290 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,amt=%d,ret=%d)",
1291 io->d->name, io->state, io->amt, ret);
1292 if(ret < 0)
1293 {
1294 return ret;
1295 }
1296 io->amt += ret;
1297 if(io->amt >= cmd_len)
1298 {
1299 io->amt = 0;
1300 switch (io->request_type)
1301 {
1302 case ASOK_REQ_VERSION:
1303 io->state = CSTATE_READ_VERSION;
1304 break;
1305 default:
1306 io->state = CSTATE_READ_AMT;
1307 break;
1308 }
1309 }
1310 return 0;
1311 }
1312 case CSTATE_READ_VERSION:
1313 {
1314 RETRY_ON_EINTR(ret,
1315 read(io->asok, ((char*)(&io->d->version)) + io->amt,
1316 sizeof(io->d->version) - io->amt));
1317 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1318 io->d->name, io->state, ret);
1319 if(ret < 0)
1320 {
1321 return ret;
1322 }
1323 io->amt += ret;
1324 if(io->amt >= sizeof(io->d->version))
1325 {
1326 io->d->version = ntohl(io->d->version);
1327 if(io->d->version != 1)
1328 {
1329 ERROR("ceph plugin: cconn_handle_event(name=%s) not "
1330 "expecting version %d!", io->d->name, io->d->version);
1331 return -ENOTSUP;
1332 }
1333 DEBUG("ceph plugin: cconn_handle_event(name=%s): identified as "
1334 "version %d", io->d->name, io->d->version);
1335 io->amt = 0;
1336 cconn_close(io);
1337 io->request_type = ASOK_REQ_SCHEMA;
1338 }
1339 return 0;
1340 }
1341 case CSTATE_READ_AMT:
1342 {
1343 RETRY_ON_EINTR(ret,
1344 read(io->asok, ((char*)(&io->json_len)) + io->amt,
1345 sizeof(io->json_len) - io->amt));
1346 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1347 io->d->name, io->state, ret);
1348 if(ret < 0)
1349 {
1350 return ret;
1351 }
1352 io->amt += ret;
1353 if(io->amt >= sizeof(io->json_len))
1354 {
1355 io->json_len = ntohl(io->json_len);
1356 io->amt = 0;
1357 io->state = CSTATE_READ_JSON;
1358 io->json = calloc(1, io->json_len + 1);
1359 if(!io->json)
1360 {
1361 ERROR("ceph plugin: error callocing io->json");
1362 return -ENOMEM;
1363 }
1364 }
1365 return 0;
1366 }
1367 case CSTATE_READ_JSON:
1368 {
1369 RETRY_ON_EINTR(ret,
1370 read(io->asok, io->json + io->amt, io->json_len - io->amt));
1371 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1372 io->d->name, io->state, ret);
1373 if(ret < 0)
1374 {
1375 return ret;
1376 }
1377 io->amt += ret;
1378 if(io->amt >= io->json_len)
1379 {
1380 ret = cconn_process_json(io);
1381 if(ret)
1382 {
1383 return ret;
1384 }
1385 cconn_close(io);
1386 io->request_type = ASOK_REQ_NONE;
1387 }
1388 return 0;
1389 }
1390 default:
1391 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1392 "state on line %d", io->d->name, __LINE__);
1393 return -EDOM;
1394 }
1395 }
1397 static int cconn_prepare(struct cconn *io, struct pollfd* fds)
1398 {
1399 int ret;
1400 if(io->request_type == ASOK_REQ_NONE)
1401 {
1402 /* The request has already been serviced. */
1403 return 0;
1404 }
1405 else if((io->request_type == ASOK_REQ_DATA) && (io->d->ds_num == 0))
1406 {
1407 /* If there are no counters to report on, don't bother
1408 * connecting */
1409 return 0;
1410 }
1412 switch (io->state)
1413 {
1414 case CSTATE_UNCONNECTED:
1415 ret = cconn_connect(io);
1416 if(ret > 0)
1417 {
1418 return -ret;
1419 }
1420 else if(ret < 0)
1421 {
1422 return ret;
1423 }
1424 fds->fd = io->asok;
1425 fds->events = POLLOUT;
1426 return 1;
1427 case CSTATE_WRITE_REQUEST:
1428 fds->fd = io->asok;
1429 fds->events = POLLOUT;
1430 return 1;
1431 case CSTATE_READ_VERSION:
1432 case CSTATE_READ_AMT:
1433 case CSTATE_READ_JSON:
1434 fds->fd = io->asok;
1435 fds->events = POLLIN;
1436 return 1;
1437 default:
1438 ERROR("ceph plugin: cconn_prepare(name=%s) got to illegal state "
1439 "on line %d", io->d->name, __LINE__);
1440 return -EDOM;
1441 }
1442 }
1444 /** Returns the difference between two struct timevals in milliseconds.
1445 * On overflow, we return max/min int.
1446 */
1447 static int milli_diff(const struct timeval *t1, const struct timeval *t2)
1448 {
1449 int64_t ret;
1450 int sec_diff = t1->tv_sec - t2->tv_sec;
1451 int usec_diff = t1->tv_usec - t2->tv_usec;
1452 ret = usec_diff / 1000;
1453 ret += (sec_diff * 1000);
1454 return (ret > INT_MAX) ? INT_MAX : ((ret < INT_MIN) ? INT_MIN : (int)ret);
1455 }
1457 /** This handles the actual network I/O to talk to the Ceph daemons.
1458 */
1459 static int cconn_main_loop(uint32_t request_type)
1460 {
1461 int i, ret, some_unreachable = 0;
1462 struct timeval end_tv;
1463 struct cconn io_array[g_num_daemons];
1465 DEBUG("ceph plugin: entering cconn_main_loop(request_type = %d)", request_type);
1467 /* create cconn array */
1468 memset(io_array, 0, sizeof(io_array));
1469 for(i = 0; i < g_num_daemons; ++i)
1470 {
1471 io_array[i].d = g_daemons[i];
1472 io_array[i].request_type = request_type;
1473 io_array[i].state = CSTATE_UNCONNECTED;
1474 }
1476 /** Calculate the time at which we should give up */
1477 gettimeofday(&end_tv, NULL);
1478 end_tv.tv_sec += CEPH_TIMEOUT_INTERVAL;
1480 while (1)
1481 {
1482 int nfds, diff;
1483 struct timeval tv;
1484 struct cconn *polled_io_array[g_num_daemons];
1485 struct pollfd fds[g_num_daemons];
1486 memset(fds, 0, sizeof(fds));
1487 nfds = 0;
1488 for(i = 0; i < g_num_daemons; ++i)
1489 {
1490 struct cconn *io = io_array + i;
1491 ret = cconn_prepare(io, fds + nfds);
1492 if(ret < 0)
1493 {
1494 WARNING("ceph plugin: cconn_prepare(name=%s,i=%d,st=%d)=%d",
1495 io->d->name, i, io->state, ret);
1496 cconn_close(io);
1497 io->request_type = ASOK_REQ_NONE;
1498 some_unreachable = 1;
1499 }
1500 else if(ret == 1)
1501 {
1502 polled_io_array[nfds++] = io_array + i;
1503 }
1504 }
1505 if(nfds == 0)
1506 {
1507 /* finished */
1508 ret = 0;
1509 goto done;
1510 }
1511 gettimeofday(&tv, NULL);
1512 diff = milli_diff(&end_tv, &tv);
1513 if(diff <= 0)
1514 {
1515 /* Timed out */
1516 ret = -ETIMEDOUT;
1517 WARNING("ceph plugin: cconn_main_loop: timed out.");
1518 goto done;
1519 }
1520 RETRY_ON_EINTR(ret, poll(fds, nfds, diff));
1521 if(ret < 0)
1522 {
1523 ERROR("ceph plugin: poll(2) error: %d", ret);
1524 goto done;
1525 }
1526 for(i = 0; i < nfds; ++i)
1527 {
1528 struct cconn *io = polled_io_array[i];
1529 int revents = fds[i].revents;
1530 if(revents == 0)
1531 {
1532 /* do nothing */
1533 }
1534 else if(cconn_validate_revents(io, revents))
1535 {
1536 WARNING("ceph plugin: cconn(name=%s,i=%d,st=%d): "
1537 "revents validation error: "
1538 "revents=0x%08x", io->d->name, i, io->state, revents);
1539 cconn_close(io);
1540 io->request_type = ASOK_REQ_NONE;
1541 some_unreachable = 1;
1542 }
1543 else
1544 {
1545 ret = cconn_handle_event(io);
1546 if(ret)
1547 {
1548 WARNING("ceph plugin: cconn_handle_event(name=%s,"
1549 "i=%d,st=%d): error %d", io->d->name, i, io->state, ret);
1550 cconn_close(io);
1551 io->request_type = ASOK_REQ_NONE;
1552 some_unreachable = 1;
1553 }
1554 }
1555 }
1556 }
1557 done: for(i = 0; i < g_num_daemons; ++i)
1558 {
1559 cconn_close(io_array + i);
1560 }
1561 if(some_unreachable)
1562 {
1563 DEBUG("ceph plugin: cconn_main_loop: some Ceph daemons were unreachable.");
1564 }
1565 else
1566 {
1567 DEBUG("ceph plugin: cconn_main_loop: reached all Ceph daemons :)");
1568 }
1569 return ret;
1570 }
1572 static int ceph_read(void)
1573 {
1574 return cconn_main_loop(ASOK_REQ_DATA);
1575 }
1577 /******* lifecycle *******/
1578 static int ceph_init(void)
1579 {
1580 int ret;
1581 ceph_daemons_print();
1583 ret = cconn_main_loop(ASOK_REQ_VERSION);
1585 return (ret) ? ret : 0;
1586 }
1588 static int ceph_shutdown(void)
1589 {
1590 int i;
1591 for(i = 0; i < g_num_daemons; ++i)
1592 {
1593 ceph_daemon_free(g_daemons[i]);
1594 }
1595 sfree(g_daemons);
1596 g_daemons = NULL;
1597 g_num_daemons = 0;
1598 DEBUG("ceph plugin: finished ceph_shutdown");
1599 return 0;
1600 }
1602 void module_register(void)
1603 {
1604 plugin_register_complex_config("ceph", ceph_config);
1605 plugin_register_init("ceph", ceph_init);
1606 plugin_register_read("ceph", ceph_read);
1607 plugin_register_shutdown("ceph", ceph_shutdown);
1608 }
1609 /* vim: set sw=4 sts=4 et : */