1 /**
2 * collectd - src/ceph.c
3 * Copyright (C) 2011 New Dream Network
4 * Copyright (C) 2015 Florian octo Forster
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Colin McCabe <cmccabe at alumni.cmu.edu>
21 * Dennis Zou <yunzou at cisco.com>
22 * Dan Ryder <daryder at cisco.com>
23 * Florian octo Forster <octo at collectd.org>
24 **/
26 #define _DEFAULT_SOURCE
27 #define _BSD_SOURCE
29 #include "collectd.h"
30 #include "common.h"
31 #include "plugin.h"
33 #include <arpa/inet.h>
34 #include <errno.h>
35 #include <fcntl.h>
36 #include <yajl/yajl_parse.h>
37 #if HAVE_YAJL_YAJL_VERSION_H
38 #include <yajl/yajl_version.h>
39 #endif
41 #include <limits.h>
42 #include <poll.h>
43 #include <stdint.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <strings.h>
48 #include <sys/socket.h>
49 #include <sys/time.h>
50 #include <sys/types.h>
51 #include <sys/un.h>
52 #include <unistd.h>
53 #include <math.h>
54 #include <inttypes.h>
56 #define RETRY_AVGCOUNT -1
58 #if defined(YAJL_MAJOR) && (YAJL_MAJOR > 1)
59 # define HAVE_YAJL_V2 1
60 #endif
62 #define RETRY_ON_EINTR(ret, expr) \
63 while(1) { \
64 ret = expr; \
65 if(ret >= 0) \
66 break; \
67 ret = -errno; \
68 if(ret != -EINTR) \
69 break; \
70 }
72 /** Timeout interval in seconds */
73 #define CEPH_TIMEOUT_INTERVAL 1
75 /** Maximum path length for a UNIX domain socket on this system */
76 #define UNIX_DOMAIN_SOCK_PATH_MAX (sizeof(((struct sockaddr_un*)0)->sun_path))
78 /** Yajl callback returns */
79 #define CEPH_CB_CONTINUE 1
80 #define CEPH_CB_ABORT 0
82 #if HAVE_YAJL_V2
83 typedef size_t yajl_len_t;
84 #else
85 typedef unsigned int yajl_len_t;
86 #endif
88 /** Number of types for ceph defined in types.db */
89 #define CEPH_DSET_TYPES_NUM 3
90 /** ceph types enum */
91 enum ceph_dset_type_d
92 {
93 DSET_LATENCY = 0,
94 DSET_BYTES = 1,
95 DSET_RATE = 2,
96 DSET_TYPE_UNFOUND = 1000
97 };
99 /** Valid types for ceph defined in types.db */
100 const char * ceph_dset_types [CEPH_DSET_TYPES_NUM] =
101 {"ceph_latency", "ceph_bytes", "ceph_rate"};
103 /******* ceph_daemon *******/
104 struct ceph_daemon
105 {
106 /** Version of the admin_socket interface */
107 uint32_t version;
108 /** daemon name **/
109 char name[DATA_MAX_NAME_LEN];
111 /** Path to the socket that we use to talk to the ceph daemon */
112 char asok_path[UNIX_DOMAIN_SOCK_PATH_MAX];
114 /** Number of counters */
115 int ds_num;
116 /** Track ds types */
117 uint32_t *ds_types;
118 /** Track ds names to match with types */
119 char **ds_names;
121 /**
122 * Keep track of last data for latency values so we can calculate rate
123 * since last poll.
124 */
125 struct last_data **last_poll_data;
126 /** index of last poll data */
127 int last_idx;
128 };
130 /******* JSON parsing *******/
131 typedef int (*node_handler_t)(void *, const char*, const char*);
133 /** Track state and handler while parsing JSON */
134 struct yajl_struct
135 {
136 node_handler_t handler;
137 void * handler_arg;
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 memcpy(buffer, number_val, number_len);
277 buffer[sizeof(buffer) - 1] = 0;
279 memset (key, 0, sizeof (key));
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];
597 memset(ds_name, 0, sizeof(ds_name));
599 if(convert_special_metrics)
600 {
601 /**
602 * Special case for filestore:JournalWrBytes. For some reason, Ceph
603 * schema encodes this as a count/sum pair while all other "Bytes" data
604 * (excluding used/capacity bytes for OSD space) uses a single "Derive"
605 * type. To spare further confusion, keep this KPI as the same type of
606 * other "Bytes". Instead of keeping an "average" or "rate", use the
607 * "sum" in the pair and assign that to the derive value.
608 */
609 if((strcmp(name,"filestore.journal_wr_bytes.type") == 0))
610 {
611 pc_type = 10;
612 }
613 }
615 d->ds_names = realloc(d->ds_names, sizeof(char *) * (d->ds_num + 1));
616 if(!d->ds_names)
617 {
618 return -ENOMEM;
619 }
621 d->ds_types = realloc(d->ds_types, sizeof(uint32_t) * (d->ds_num + 1));
622 if(!d->ds_types)
623 {
624 return -ENOMEM;
625 }
627 d->ds_names[d->ds_num] = malloc(sizeof(char) * DATA_MAX_NAME_LEN);
628 if(!d->ds_names[d->ds_num])
629 {
630 return -ENOMEM;
631 }
633 type = (pc_type & PERFCOUNTER_DERIVE) ? DSET_RATE :
634 ((pc_type & PERFCOUNTER_LATENCY) ? DSET_LATENCY : DSET_BYTES);
635 d->ds_types[d->ds_num] = type;
637 if (parse_keys(ds_name, sizeof (ds_name), name))
638 {
639 return 1;
640 }
642 sstrncpy(d->ds_names[d->ds_num], ds_name, DATA_MAX_NAME_LEN -1);
643 d->ds_num = (d->ds_num + 1);
645 return 0;
646 }
648 /******* ceph_config *******/
649 static int cc_handle_str(struct oconfig_item_s *item, char *dest, int dest_len)
650 {
651 const char *val;
652 if(item->values_num != 1)
653 {
654 return -ENOTSUP;
655 }
656 if(item->values[0].type != OCONFIG_TYPE_STRING)
657 {
658 return -ENOTSUP;
659 }
660 val = item->values[0].value.string;
661 if(snprintf(dest, dest_len, "%s", val) > (dest_len - 1))
662 {
663 ERROR("ceph plugin: configuration parameter '%s' is too long.\n",
664 item->key);
665 return -ENAMETOOLONG;
666 }
667 return 0;
668 }
670 static int cc_handle_bool(struct oconfig_item_s *item, int *dest)
671 {
672 if(item->values_num != 1)
673 {
674 return -ENOTSUP;
675 }
677 if(item->values[0].type != OCONFIG_TYPE_BOOLEAN)
678 {
679 return -ENOTSUP;
680 }
682 *dest = (item->values[0].value.boolean) ? 1 : 0;
683 return 0;
684 }
686 static int cc_add_daemon_config(oconfig_item_t *ci)
687 {
688 int ret, i;
689 struct ceph_daemon *nd, cd;
690 struct ceph_daemon **tmp;
691 memset(&cd, 0, sizeof(struct ceph_daemon));
693 if((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
694 {
695 WARNING("ceph plugin: `Daemon' blocks need exactly one string "
696 "argument.");
697 return (-1);
698 }
700 ret = cc_handle_str(ci, cd.name, DATA_MAX_NAME_LEN);
701 if(ret)
702 {
703 return ret;
704 }
706 for(i=0; i < ci->children_num; i++)
707 {
708 oconfig_item_t *child = ci->children + i;
710 if(strcasecmp("SocketPath", child->key) == 0)
711 {
712 ret = cc_handle_str(child, cd.asok_path, sizeof(cd.asok_path));
713 if(ret)
714 {
715 return ret;
716 }
717 }
718 else
719 {
720 WARNING("ceph plugin: ignoring unknown option %s", child->key);
721 }
722 }
723 if(cd.name[0] == '\0')
724 {
725 ERROR("ceph plugin: you must configure a daemon name.\n");
726 return -EINVAL;
727 }
728 else if(cd.asok_path[0] == '\0')
729 {
730 ERROR("ceph plugin(name=%s): you must configure an administrative "
731 "socket path.\n", cd.name);
732 return -EINVAL;
733 }
734 else if(!((cd.asok_path[0] == '/') ||
735 (cd.asok_path[0] == '.' && cd.asok_path[1] == '/')))
736 {
737 ERROR("ceph plugin(name=%s): administrative socket paths must begin "
738 "with '/' or './' Can't parse: '%s'\n", cd.name, cd.asok_path);
739 return -EINVAL;
740 }
742 tmp = realloc(g_daemons, (g_num_daemons+1) * sizeof(*g_daemons));
743 if(tmp == NULL)
744 {
745 /* The positive return value here indicates that this is a
746 * runtime error, not a configuration error. */
747 return ENOMEM;
748 }
749 g_daemons = tmp;
751 nd = malloc(sizeof(*nd));
752 if(!nd)
753 {
754 return ENOMEM;
755 }
756 memcpy(nd, &cd, sizeof(*nd));
757 g_daemons[g_num_daemons++] = nd;
758 return 0;
759 }
761 static int ceph_config(oconfig_item_t *ci)
762 {
763 int ret, i;
765 for(i = 0; i < ci->children_num; ++i)
766 {
767 oconfig_item_t *child = ci->children + i;
768 if(strcasecmp("Daemon", child->key) == 0)
769 {
770 ret = cc_add_daemon_config(child);
771 if(ret == ENOMEM)
772 {
773 ERROR("ceph plugin: Couldn't allocate memory");
774 return ret;
775 }
776 else if(ret)
777 {
778 //process other daemons and ignore this one
779 continue;
780 }
781 }
782 else if(strcasecmp("LongRunAvgLatency", child->key) == 0)
783 {
784 ret = cc_handle_bool(child, &long_run_latency_avg);
785 if(ret)
786 {
787 return ret;
788 }
789 }
790 else if(strcasecmp("ConvertSpecialMetricTypes", child->key) == 0)
791 {
792 ret = cc_handle_bool(child, &convert_special_metrics);
793 if(ret)
794 {
795 return ret;
796 }
797 }
798 else
799 {
800 WARNING("ceph plugin: ignoring unknown option %s", child->key);
801 }
802 }
803 return 0;
804 }
806 /**
807 * Parse JSON and get error message if present
808 */
809 static int
810 traverse_json(const unsigned char *json, uint32_t json_len, yajl_handle hand)
811 {
812 yajl_status status = yajl_parse(hand, json, json_len);
813 unsigned char *msg;
815 switch(status)
816 {
817 case yajl_status_error:
818 msg = yajl_get_error(hand, /* verbose = */ 1,
819 /* jsonText = */ (unsigned char *) json,
820 (unsigned int) json_len);
821 ERROR ("ceph plugin: yajl_parse failed: %s", msg);
822 yajl_free_error(hand, msg);
823 return 1;
824 case yajl_status_client_canceled:
825 return 1;
826 default:
827 return 0;
828 }
829 }
831 /**
832 * Add entry for each counter while parsing schema
833 */
834 static int
835 node_handler_define_schema(void *arg, const char *val, const char *key)
836 {
837 struct ceph_daemon *d = (struct ceph_daemon *) arg;
838 int pc_type;
839 pc_type = atoi(val);
840 return ceph_daemon_add_ds_entry(d, key, pc_type);
841 }
843 /**
844 * Latency counter does not yet have an entry in last poll data - add it.
845 */
846 static int add_last(struct ceph_daemon *d, const char *ds_n, double cur_sum,
847 uint64_t cur_count)
848 {
849 d->last_poll_data[d->last_idx] = malloc(1 * sizeof(struct last_data));
850 if(!d->last_poll_data[d->last_idx])
851 {
852 return -ENOMEM;
853 }
854 sstrncpy(d->last_poll_data[d->last_idx]->ds_name,ds_n,
855 sizeof(d->last_poll_data[d->last_idx]->ds_name));
856 d->last_poll_data[d->last_idx]->last_sum = cur_sum;
857 d->last_poll_data[d->last_idx]->last_count = cur_count;
858 d->last_idx = (d->last_idx + 1);
859 return 0;
860 }
862 /**
863 * Update latency counter or add new entry if it doesn't exist
864 */
865 static int update_last(struct ceph_daemon *d, const char *ds_n, int index,
866 double cur_sum, uint64_t cur_count)
867 {
868 if((d->last_idx > index) && (strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0))
869 {
870 d->last_poll_data[index]->last_sum = cur_sum;
871 d->last_poll_data[index]->last_count = cur_count;
872 return 0;
873 }
875 if(!d->last_poll_data)
876 {
877 d->last_poll_data = malloc(1 * sizeof(struct last_data *));
878 if(!d->last_poll_data)
879 {
880 return -ENOMEM;
881 }
882 }
883 else
884 {
885 struct last_data **tmp_last = realloc(d->last_poll_data,
886 ((d->last_idx+1) * sizeof(struct last_data *)));
887 if(!tmp_last)
888 {
889 return -ENOMEM;
890 }
891 d->last_poll_data = tmp_last;
892 }
893 return add_last(d, ds_n, cur_sum, cur_count);
894 }
896 /**
897 * If using index guess failed (shouldn't happen, but possible if counters
898 * get rearranged), resort to searching for counter name
899 */
900 static int backup_search_for_last_avg(struct ceph_daemon *d, const char *ds_n)
901 {
902 int i = 0;
903 for(; i < d->last_idx; i++)
904 {
905 if(strcmp(d->last_poll_data[i]->ds_name, ds_n) == 0)
906 {
907 return i;
908 }
909 }
910 return -1;
911 }
913 /**
914 * Calculate average b/t current data and last poll data
915 * if last poll data exists
916 */
917 static double get_last_avg(struct ceph_daemon *d, const char *ds_n, int index,
918 double cur_sum, uint64_t cur_count)
919 {
920 double result = -1.1, sum_delt = 0.0;
921 uint64_t count_delt = 0;
922 int tmp_index = 0;
923 if(d->last_idx > index)
924 {
925 if(strcmp(d->last_poll_data[index]->ds_name, ds_n) == 0)
926 {
927 tmp_index = index;
928 }
929 //test previous index
930 else if((index > 0) && (strcmp(d->last_poll_data[index-1]->ds_name, ds_n) == 0))
931 {
932 tmp_index = (index - 1);
933 }
934 else
935 {
936 tmp_index = backup_search_for_last_avg(d, ds_n);
937 }
939 if((tmp_index > -1) && (cur_count > d->last_poll_data[tmp_index]->last_count))
940 {
941 sum_delt = (cur_sum - d->last_poll_data[tmp_index]->last_sum);
942 count_delt = (cur_count - d->last_poll_data[tmp_index]->last_count);
943 result = (sum_delt / count_delt);
944 }
945 }
947 if(result == -1.1)
948 {
949 result = NAN;
950 }
951 if(update_last(d, ds_n, tmp_index, cur_sum, cur_count) == -ENOMEM)
952 {
953 return -ENOMEM;
954 }
955 return result;
956 }
958 /**
959 * If using index guess failed, resort to searching for counter name
960 */
961 static uint32_t backup_search_for_type(struct ceph_daemon *d, char *ds_name)
962 {
963 int idx = 0;
964 for(; idx < d->ds_num; idx++)
965 {
966 if(strcmp(d->ds_names[idx], ds_name) == 0)
967 {
968 return d->ds_types[idx];
969 }
970 }
971 return DSET_TYPE_UNFOUND;
972 }
974 /**
975 * Process counter data and dispatch values
976 */
977 static int node_handler_fetch_data(void *arg, const char *val, const char *key)
978 {
979 value_t uv;
980 double tmp_d;
981 uint64_t tmp_u;
982 struct values_tmp *vtmp = (struct values_tmp*) arg;
983 uint32_t type = DSET_TYPE_UNFOUND;
984 int index = vtmp->index;
986 char ds_name[DATA_MAX_NAME_LEN];
987 memset(ds_name, 0, sizeof(ds_name));
989 if (parse_keys (ds_name, sizeof (ds_name), key))
990 {
991 return 1;
992 }
994 if(index >= vtmp->d->ds_num)
995 {
996 //don't overflow bounds of array
997 index = (vtmp->d->ds_num - 1);
998 }
1000 /**
1001 * counters should remain in same order we parsed schema... we maintain the
1002 * index variable to keep track of current point in list of counters. first
1003 * use index to guess point in array for retrieving type. if that doesn't
1004 * work, use the old way to get the counter type
1005 */
1006 if(strcmp(ds_name, vtmp->d->ds_names[index]) == 0)
1007 {
1008 //found match
1009 type = vtmp->d->ds_types[index];
1010 }
1011 else if((index > 0) && (strcmp(ds_name, vtmp->d->ds_names[index-1]) == 0))
1012 {
1013 //try previous key
1014 type = vtmp->d->ds_types[index-1];
1015 }
1017 if(type == DSET_TYPE_UNFOUND)
1018 {
1019 //couldn't find right type by guessing, check the old way
1020 type = backup_search_for_type(vtmp->d, ds_name);
1021 }
1023 switch(type)
1024 {
1025 case DSET_LATENCY:
1026 if(vtmp->avgcount_exists == -1)
1027 {
1028 sscanf(val, "%" PRIu64, &vtmp->avgcount);
1029 vtmp->avgcount_exists = 0;
1030 //return after saving avgcount - don't dispatch value
1031 //until latency calculation
1032 return 0;
1033 }
1034 else
1035 {
1036 double sum, result;
1037 sscanf(val, "%lf", &sum);
1039 if(vtmp->avgcount == 0)
1040 {
1041 vtmp->avgcount = 1;
1042 }
1044 /** User wants latency values as long run avg */
1045 if(long_run_latency_avg)
1046 {
1047 result = (sum / vtmp->avgcount);
1048 }
1049 else
1050 {
1051 result = get_last_avg(vtmp->d, ds_name, vtmp->latency_index, sum, vtmp->avgcount);
1052 if(result == -ENOMEM)
1053 {
1054 return -ENOMEM;
1055 }
1056 }
1058 uv.gauge = result;
1059 vtmp->avgcount_exists = -1;
1060 vtmp->latency_index = (vtmp->latency_index + 1);
1061 }
1062 break;
1063 case DSET_BYTES:
1064 sscanf(val, "%lf", &tmp_d);
1065 uv.gauge = tmp_d;
1066 break;
1067 case DSET_RATE:
1068 sscanf(val, "%" PRIu64, &tmp_u);
1069 uv.derive = tmp_u;
1070 break;
1071 case DSET_TYPE_UNFOUND:
1072 default:
1073 ERROR("ceph plugin: ds %s was not properly initialized.", ds_name);
1074 return -1;
1075 }
1077 sstrncpy(vtmp->vlist.type, ceph_dset_types[type], sizeof(vtmp->vlist.type));
1078 sstrncpy(vtmp->vlist.type_instance, ds_name, sizeof(vtmp->vlist.type_instance));
1079 vtmp->vlist.values = &uv;
1080 vtmp->vlist.values_len = 1;
1082 vtmp->index = (vtmp->index + 1);
1083 plugin_dispatch_values(&vtmp->vlist);
1085 return 0;
1086 }
1088 static int cconn_connect(struct cconn *io)
1089 {
1090 struct sockaddr_un address;
1091 int flags, fd, err;
1092 if(io->state != CSTATE_UNCONNECTED)
1093 {
1094 ERROR("ceph plugin: cconn_connect: io->state != CSTATE_UNCONNECTED");
1095 return -EDOM;
1096 }
1097 fd = socket(PF_UNIX, SOCK_STREAM, 0);
1098 if(fd < 0)
1099 {
1100 err = -errno;
1101 ERROR("ceph plugin: cconn_connect: socket(PF_UNIX, SOCK_STREAM, 0) "
1102 "failed: error %d", err);
1103 return err;
1104 }
1105 memset(&address, 0, sizeof(struct sockaddr_un));
1106 address.sun_family = AF_UNIX;
1107 snprintf(address.sun_path, sizeof(address.sun_path), "%s",
1108 io->d->asok_path);
1109 RETRY_ON_EINTR(err,
1110 connect(fd, (struct sockaddr *) &address, sizeof(struct sockaddr_un)));
1111 if(err < 0)
1112 {
1113 ERROR("ceph plugin: cconn_connect: connect(%d) failed: error %d",
1114 fd, err);
1115 close(fd);
1116 return err;
1117 }
1119 flags = fcntl(fd, F_GETFL, 0);
1120 if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) != 0)
1121 {
1122 err = -errno;
1123 ERROR("ceph plugin: cconn_connect: fcntl(%d, O_NONBLOCK) error %d",
1124 fd, err);
1125 close(fd);
1126 return err;
1127 }
1128 io->asok = fd;
1129 io->state = CSTATE_WRITE_REQUEST;
1130 io->amt = 0;
1131 io->json_len = 0;
1132 io->json = NULL;
1133 return 0;
1134 }
1136 static void cconn_close(struct cconn *io)
1137 {
1138 io->state = CSTATE_UNCONNECTED;
1139 if(io->asok != -1)
1140 {
1141 int res;
1142 RETRY_ON_EINTR(res, close(io->asok));
1143 }
1144 io->asok = -1;
1145 io->amt = 0;
1146 io->json_len = 0;
1147 sfree(io->json);
1148 io->json = NULL;
1149 }
1151 /* Process incoming JSON counter data */
1152 static int
1153 cconn_process_data(struct cconn *io, yajl_struct *yajl, yajl_handle hand)
1154 {
1155 int ret;
1156 struct values_tmp *vtmp = calloc(1, sizeof(struct values_tmp) * 1);
1157 if(!vtmp)
1158 {
1159 return -ENOMEM;
1160 }
1162 vtmp->vlist = (value_list_t)VALUE_LIST_INIT;
1163 sstrncpy(vtmp->vlist.host, hostname_g, sizeof(vtmp->vlist.host));
1164 sstrncpy(vtmp->vlist.plugin, "ceph", sizeof(vtmp->vlist.plugin));
1165 sstrncpy(vtmp->vlist.plugin_instance, io->d->name, sizeof(vtmp->vlist.plugin_instance));
1167 vtmp->d = io->d;
1168 vtmp->avgcount_exists = -1;
1169 vtmp->latency_index = 0;
1170 vtmp->index = 0;
1171 yajl->handler_arg = vtmp;
1172 ret = traverse_json(io->json, io->json_len, hand);
1173 sfree(vtmp);
1174 return ret;
1175 }
1177 /**
1178 * Initiate JSON parsing and print error if one occurs
1179 */
1180 static int cconn_process_json(struct cconn *io)
1181 {
1182 if((io->request_type != ASOK_REQ_DATA) &&
1183 (io->request_type != ASOK_REQ_SCHEMA))
1184 {
1185 return -EDOM;
1186 }
1188 int result = 1;
1189 yajl_handle hand;
1190 yajl_status status;
1192 hand = yajl_alloc(&callbacks,
1193 #if HAVE_YAJL_V2
1194 /* alloc funcs = */ NULL,
1195 #else
1196 /* alloc funcs = */ NULL, NULL,
1197 #endif
1198 /* context = */ (void *)(&io->yajl));
1200 if(!hand)
1201 {
1202 ERROR ("ceph plugin: yajl_alloc failed.");
1203 return ENOMEM;
1204 }
1206 io->yajl.depth = 0;
1208 switch(io->request_type)
1209 {
1210 case ASOK_REQ_DATA:
1211 io->yajl.handler = node_handler_fetch_data;
1212 result = cconn_process_data(io, &io->yajl, hand);
1213 break;
1214 case ASOK_REQ_SCHEMA:
1215 //init daemon specific variables
1216 io->d->ds_num = 0;
1217 io->d->last_idx = 0;
1218 io->d->last_poll_data = NULL;
1219 io->yajl.handler = node_handler_define_schema;
1220 io->yajl.handler_arg = io->d;
1221 result = traverse_json(io->json, io->json_len, hand);
1222 break;
1223 }
1225 if(result)
1226 {
1227 goto done;
1228 }
1230 #if HAVE_YAJL_V2
1231 status = yajl_complete_parse(hand);
1232 #else
1233 status = yajl_parse_complete(hand);
1234 #endif
1236 if (status != yajl_status_ok)
1237 {
1238 unsigned char *errmsg = yajl_get_error (hand, /* verbose = */ 0,
1239 /* jsonText = */ NULL, /* jsonTextLen = */ 0);
1240 ERROR ("ceph plugin: yajl_parse_complete failed: %s",
1241 (char *) errmsg);
1242 yajl_free_error (hand, errmsg);
1243 yajl_free (hand);
1244 return 1;
1245 }
1247 done:
1248 yajl_free (hand);
1249 return result;
1250 }
1252 static int cconn_validate_revents(struct cconn *io, int revents)
1253 {
1254 if(revents & POLLERR)
1255 {
1256 ERROR("ceph plugin: cconn_validate_revents(name=%s): got POLLERR",
1257 io->d->name);
1258 return -EIO;
1259 }
1260 switch (io->state)
1261 {
1262 case CSTATE_WRITE_REQUEST:
1263 return (revents & POLLOUT) ? 0 : -EINVAL;
1264 case CSTATE_READ_VERSION:
1265 case CSTATE_READ_AMT:
1266 case CSTATE_READ_JSON:
1267 return (revents & POLLIN) ? 0 : -EINVAL;
1268 default:
1269 ERROR("ceph plugin: cconn_validate_revents(name=%s) got to "
1270 "illegal state on line %d", io->d->name, __LINE__);
1271 return -EDOM;
1272 }
1273 }
1275 /** Handle a network event for a connection */
1276 static int cconn_handle_event(struct cconn *io)
1277 {
1278 int ret;
1279 switch (io->state)
1280 {
1281 case CSTATE_UNCONNECTED:
1282 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1283 "state on line %d", io->d->name, __LINE__);
1285 return -EDOM;
1286 case CSTATE_WRITE_REQUEST:
1287 {
1288 char cmd[32];
1289 snprintf(cmd, sizeof(cmd), "%s%d%s", "{ \"prefix\": \"",
1290 io->request_type, "\" }\n");
1291 size_t cmd_len = strlen(cmd);
1292 RETRY_ON_EINTR(ret,
1293 write(io->asok, ((char*)&cmd) + io->amt, cmd_len - io->amt));
1294 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,amt=%d,ret=%d)",
1295 io->d->name, io->state, io->amt, ret);
1296 if(ret < 0)
1297 {
1298 return ret;
1299 }
1300 io->amt += ret;
1301 if(io->amt >= cmd_len)
1302 {
1303 io->amt = 0;
1304 switch (io->request_type)
1305 {
1306 case ASOK_REQ_VERSION:
1307 io->state = CSTATE_READ_VERSION;
1308 break;
1309 default:
1310 io->state = CSTATE_READ_AMT;
1311 break;
1312 }
1313 }
1314 return 0;
1315 }
1316 case CSTATE_READ_VERSION:
1317 {
1318 RETRY_ON_EINTR(ret,
1319 read(io->asok, ((char*)(&io->d->version)) + io->amt,
1320 sizeof(io->d->version) - io->amt));
1321 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1322 io->d->name, io->state, ret);
1323 if(ret < 0)
1324 {
1325 return ret;
1326 }
1327 io->amt += ret;
1328 if(io->amt >= sizeof(io->d->version))
1329 {
1330 io->d->version = ntohl(io->d->version);
1331 if(io->d->version != 1)
1332 {
1333 ERROR("ceph plugin: cconn_handle_event(name=%s) not "
1334 "expecting version %d!", io->d->name, io->d->version);
1335 return -ENOTSUP;
1336 }
1337 DEBUG("ceph plugin: cconn_handle_event(name=%s): identified as "
1338 "version %d", io->d->name, io->d->version);
1339 io->amt = 0;
1340 cconn_close(io);
1341 io->request_type = ASOK_REQ_SCHEMA;
1342 }
1343 return 0;
1344 }
1345 case CSTATE_READ_AMT:
1346 {
1347 RETRY_ON_EINTR(ret,
1348 read(io->asok, ((char*)(&io->json_len)) + io->amt,
1349 sizeof(io->json_len) - io->amt));
1350 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1351 io->d->name, io->state, ret);
1352 if(ret < 0)
1353 {
1354 return ret;
1355 }
1356 io->amt += ret;
1357 if(io->amt >= sizeof(io->json_len))
1358 {
1359 io->json_len = ntohl(io->json_len);
1360 io->amt = 0;
1361 io->state = CSTATE_READ_JSON;
1362 io->json = calloc(1, io->json_len + 1);
1363 if(!io->json)
1364 {
1365 ERROR("ceph plugin: error callocing io->json");
1366 return -ENOMEM;
1367 }
1368 }
1369 return 0;
1370 }
1371 case CSTATE_READ_JSON:
1372 {
1373 RETRY_ON_EINTR(ret,
1374 read(io->asok, io->json + io->amt, io->json_len - io->amt));
1375 DEBUG("ceph plugin: cconn_handle_event(name=%s,state=%d,ret=%d)",
1376 io->d->name, io->state, ret);
1377 if(ret < 0)
1378 {
1379 return ret;
1380 }
1381 io->amt += ret;
1382 if(io->amt >= io->json_len)
1383 {
1384 ret = cconn_process_json(io);
1385 if(ret)
1386 {
1387 return ret;
1388 }
1389 cconn_close(io);
1390 io->request_type = ASOK_REQ_NONE;
1391 }
1392 return 0;
1393 }
1394 default:
1395 ERROR("ceph plugin: cconn_handle_event(name=%s) got to illegal "
1396 "state on line %d", io->d->name, __LINE__);
1397 return -EDOM;
1398 }
1399 }
1401 static int cconn_prepare(struct cconn *io, struct pollfd* fds)
1402 {
1403 int ret;
1404 if(io->request_type == ASOK_REQ_NONE)
1405 {
1406 /* The request has already been serviced. */
1407 return 0;
1408 }
1409 else if((io->request_type == ASOK_REQ_DATA) && (io->d->ds_num == 0))
1410 {
1411 /* If there are no counters to report on, don't bother
1412 * connecting */
1413 return 0;
1414 }
1416 switch (io->state)
1417 {
1418 case CSTATE_UNCONNECTED:
1419 ret = cconn_connect(io);
1420 if(ret > 0)
1421 {
1422 return -ret;
1423 }
1424 else if(ret < 0)
1425 {
1426 return ret;
1427 }
1428 fds->fd = io->asok;
1429 fds->events = POLLOUT;
1430 return 1;
1431 case CSTATE_WRITE_REQUEST:
1432 fds->fd = io->asok;
1433 fds->events = POLLOUT;
1434 return 1;
1435 case CSTATE_READ_VERSION:
1436 case CSTATE_READ_AMT:
1437 case CSTATE_READ_JSON:
1438 fds->fd = io->asok;
1439 fds->events = POLLIN;
1440 return 1;
1441 default:
1442 ERROR("ceph plugin: cconn_prepare(name=%s) got to illegal state "
1443 "on line %d", io->d->name, __LINE__);
1444 return -EDOM;
1445 }
1446 }
1448 /** Returns the difference between two struct timevals in milliseconds.
1449 * On overflow, we return max/min int.
1450 */
1451 static int milli_diff(const struct timeval *t1, const struct timeval *t2)
1452 {
1453 int64_t ret;
1454 int sec_diff = t1->tv_sec - t2->tv_sec;
1455 int usec_diff = t1->tv_usec - t2->tv_usec;
1456 ret = usec_diff / 1000;
1457 ret += (sec_diff * 1000);
1458 return (ret > INT_MAX) ? INT_MAX : ((ret < INT_MIN) ? INT_MIN : (int)ret);
1459 }
1461 /** This handles the actual network I/O to talk to the Ceph daemons.
1462 */
1463 static int cconn_main_loop(uint32_t request_type)
1464 {
1465 int i, ret, some_unreachable = 0;
1466 struct timeval end_tv;
1467 struct cconn io_array[g_num_daemons];
1469 DEBUG("ceph plugin: entering cconn_main_loop(request_type = %d)", request_type);
1471 /* create cconn array */
1472 memset(io_array, 0, sizeof(io_array));
1473 for(i = 0; i < g_num_daemons; ++i)
1474 {
1475 io_array[i].d = g_daemons[i];
1476 io_array[i].request_type = request_type;
1477 io_array[i].state = CSTATE_UNCONNECTED;
1478 }
1480 /** Calculate the time at which we should give up */
1481 gettimeofday(&end_tv, NULL);
1482 end_tv.tv_sec += CEPH_TIMEOUT_INTERVAL;
1484 while (1)
1485 {
1486 int nfds, diff;
1487 struct timeval tv;
1488 struct cconn *polled_io_array[g_num_daemons];
1489 struct pollfd fds[g_num_daemons];
1490 memset(fds, 0, sizeof(fds));
1491 nfds = 0;
1492 for(i = 0; i < g_num_daemons; ++i)
1493 {
1494 struct cconn *io = io_array + i;
1495 ret = cconn_prepare(io, fds + nfds);
1496 if(ret < 0)
1497 {
1498 WARNING("ceph plugin: cconn_prepare(name=%s,i=%d,st=%d)=%d",
1499 io->d->name, i, io->state, ret);
1500 cconn_close(io);
1501 io->request_type = ASOK_REQ_NONE;
1502 some_unreachable = 1;
1503 }
1504 else if(ret == 1)
1505 {
1506 polled_io_array[nfds++] = io_array + i;
1507 }
1508 }
1509 if(nfds == 0)
1510 {
1511 /* finished */
1512 ret = 0;
1513 goto done;
1514 }
1515 gettimeofday(&tv, NULL);
1516 diff = milli_diff(&end_tv, &tv);
1517 if(diff <= 0)
1518 {
1519 /* Timed out */
1520 ret = -ETIMEDOUT;
1521 WARNING("ceph plugin: cconn_main_loop: timed out.");
1522 goto done;
1523 }
1524 RETRY_ON_EINTR(ret, poll(fds, nfds, diff));
1525 if(ret < 0)
1526 {
1527 ERROR("ceph plugin: poll(2) error: %d", ret);
1528 goto done;
1529 }
1530 for(i = 0; i < nfds; ++i)
1531 {
1532 struct cconn *io = polled_io_array[i];
1533 int revents = fds[i].revents;
1534 if(revents == 0)
1535 {
1536 /* do nothing */
1537 }
1538 else if(cconn_validate_revents(io, revents))
1539 {
1540 WARNING("ceph plugin: cconn(name=%s,i=%d,st=%d): "
1541 "revents validation error: "
1542 "revents=0x%08x", io->d->name, i, io->state, revents);
1543 cconn_close(io);
1544 io->request_type = ASOK_REQ_NONE;
1545 some_unreachable = 1;
1546 }
1547 else
1548 {
1549 ret = cconn_handle_event(io);
1550 if(ret)
1551 {
1552 WARNING("ceph plugin: cconn_handle_event(name=%s,"
1553 "i=%d,st=%d): error %d", io->d->name, i, io->state, ret);
1554 cconn_close(io);
1555 io->request_type = ASOK_REQ_NONE;
1556 some_unreachable = 1;
1557 }
1558 }
1559 }
1560 }
1561 done: for(i = 0; i < g_num_daemons; ++i)
1562 {
1563 cconn_close(io_array + i);
1564 }
1565 if(some_unreachable)
1566 {
1567 DEBUG("ceph plugin: cconn_main_loop: some Ceph daemons were unreachable.");
1568 }
1569 else
1570 {
1571 DEBUG("ceph plugin: cconn_main_loop: reached all Ceph daemons :)");
1572 }
1573 return ret;
1574 }
1576 static int ceph_read(void)
1577 {
1578 return cconn_main_loop(ASOK_REQ_DATA);
1579 }
1581 /******* lifecycle *******/
1582 static int ceph_init(void)
1583 {
1584 int ret;
1585 ceph_daemons_print();
1587 ret = cconn_main_loop(ASOK_REQ_VERSION);
1589 return (ret) ? ret : 0;
1590 }
1592 static int ceph_shutdown(void)
1593 {
1594 int i;
1595 for(i = 0; i < g_num_daemons; ++i)
1596 {
1597 ceph_daemon_free(g_daemons[i]);
1598 }
1599 sfree(g_daemons);
1600 g_daemons = NULL;
1601 g_num_daemons = 0;
1602 DEBUG("ceph plugin: finished ceph_shutdown");
1603 return 0;
1604 }
1606 void module_register(void)
1607 {
1608 plugin_register_complex_config("ceph", ceph_config);
1609 plugin_register_init("ceph", ceph_init);
1610 plugin_register_read("ceph", ceph_read);
1611 plugin_register_shutdown("ceph", ceph_shutdown);
1612 }
1613 /* vim: set sw=4 sts=4 et : */