1 /**
2 * RRDTool - src/rrd_daemon.c
3 * Copyright (C) 2008-2010 Florian octo Forster
4 * Copyright (C) 2008,2009 Kevin Brintnall
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 * Florian octo Forster <octo at verplant.org>
21 * kevin brintnall <kbrint@rufus.net>
22 **/
24 #if 0
25 /*
26 * First tell the compiler to stick to the C99 and POSIX standards as close as
27 * possible.
28 */
29 #ifndef __STRICT_ANSI__ /* {{{ */
30 # define __STRICT_ANSI__
31 #endif
33 #ifndef _ISOC99_SOURCE
34 # define _ISOC99_SOURCE
35 #endif
37 #ifdef _POSIX_C_SOURCE
38 # undef _POSIX_C_SOURCE
39 #endif
40 #define _POSIX_C_SOURCE 200112L
42 /* Single UNIX needed for strdup. */
43 #ifdef _XOPEN_SOURCE
44 # undef _XOPEN_SOURCE
45 #endif
46 #define _XOPEN_SOURCE 500
48 #ifndef _REENTRANT
49 # define _REENTRANT
50 #endif
52 #ifndef _THREAD_SAFE
53 # define _THREAD_SAFE
54 #endif
56 #ifdef _GNU_SOURCE
57 # undef _GNU_SOURCE
58 #endif
59 /* }}} */
60 #endif /* 0 */
62 /*
63 * Now for some includes..
64 */
65 /* {{{ */
66 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__) && !defined(HAVE_CONFIG_H)
67 #include "../win32/config.h"
68 #else
69 #ifdef HAVE_CONFIG_H
70 #include "../rrd_config.h"
71 #endif
72 #endif
74 #include "rrd.h"
75 #include "rrd_client.h"
76 #include "unused.h"
78 #include <stdlib.h>
80 #ifndef WIN32
81 #ifdef HAVE_STDINT_H
82 # include <stdint.h>
83 #endif
84 #include <unistd.h>
85 #include <strings.h>
86 #include <inttypes.h>
87 #include <sys/socket.h>
89 #else
91 #endif
92 #include <stdio.h>
93 #include <string.h>
95 #include <sys/types.h>
96 #include <sys/stat.h>
97 #include <dirent.h>
98 #include <fcntl.h>
99 #include <signal.h>
100 #include <sys/un.h>
101 #include <netdb.h>
102 #include <poll.h>
103 #include <syslog.h>
104 #include <pthread.h>
105 #include <errno.h>
106 #include <assert.h>
107 #include <sys/time.h>
108 #include <time.h>
109 #include <libgen.h>
110 #include <grp.h>
112 #include <glib-2.0/glib.h>
113 /* }}} */
115 #define RRDD_LOG(severity, ...) \
116 do { \
117 if (stay_foreground) \
118 fprintf(stderr, __VA_ARGS__); \
119 syslog ((severity), __VA_ARGS__); \
120 } while (0)
122 /*
123 * Types
124 */
125 typedef enum { RESP_ERR = -1, RESP_OK = 0 } response_code;
127 struct listen_socket_s
128 {
129 int fd;
130 char addr[PATH_MAX + 1];
131 int family;
133 /* state for BATCH processing */
134 time_t batch_start;
135 int batch_cmd;
137 /* buffered IO */
138 char *rbuf;
139 off_t next_cmd;
140 off_t next_read;
142 char *wbuf;
143 ssize_t wbuf_len;
145 uint32_t permissions;
147 gid_t socket_group;
148 mode_t socket_permissions;
149 };
150 typedef struct listen_socket_s listen_socket_t;
152 struct command_s;
153 typedef struct command_s command_t;
154 /* note: guard against "unused" warnings in the handlers */
155 #define DISPATCH_PROTO listen_socket_t UNUSED(*sock),\
156 time_t UNUSED(now),\
157 char UNUSED(*buffer),\
158 size_t UNUSED(buffer_size)
160 #define HANDLER_PROTO command_t UNUSED(*cmd),\
161 DISPATCH_PROTO
163 struct command_s {
164 char *cmd;
165 int (*handler)(HANDLER_PROTO);
167 char context; /* where we expect to see it */
168 #define CMD_CONTEXT_CLIENT (1<<0)
169 #define CMD_CONTEXT_BATCH (1<<1)
170 #define CMD_CONTEXT_JOURNAL (1<<2)
171 #define CMD_CONTEXT_ANY (0x7f)
173 char *syntax;
174 char *help;
175 };
177 struct cache_item_s;
178 typedef struct cache_item_s cache_item_t;
179 struct cache_item_s
180 {
181 char *file;
182 char **values;
183 size_t values_num; /* number of valid pointers */
184 size_t values_alloc; /* number of allocated pointers */
185 time_t last_flush_time;
186 time_t last_update_stamp;
187 #define CI_FLAGS_IN_TREE (1<<0)
188 #define CI_FLAGS_IN_QUEUE (1<<1)
189 int flags;
190 pthread_cond_t flushed;
191 cache_item_t *prev;
192 cache_item_t *next;
193 };
195 struct callback_flush_data_s
196 {
197 time_t now;
198 time_t abs_timeout;
199 char **keys;
200 size_t keys_num;
201 };
202 typedef struct callback_flush_data_s callback_flush_data_t;
204 enum queue_side_e
205 {
206 HEAD,
207 TAIL
208 };
209 typedef enum queue_side_e queue_side_t;
211 /* describe a set of journal files */
212 typedef struct {
213 char **files;
214 size_t files_num;
215 } journal_set;
217 /* max length of socket command or response */
218 #define CMD_MAX 4096
219 #define RBUF_SIZE (CMD_MAX*2)
221 /*
222 * Variables
223 */
224 static int stay_foreground = 0;
225 static uid_t daemon_uid;
227 static listen_socket_t *listen_fds = NULL;
228 static size_t listen_fds_num = 0;
230 enum {
231 RUNNING, /* normal operation */
232 FLUSHING, /* flushing remaining values */
233 SHUTDOWN /* shutting down */
234 } state = RUNNING;
236 static pthread_t *queue_threads;
237 static pthread_cond_t queue_cond = PTHREAD_COND_INITIALIZER;
238 static int config_queue_threads = 4;
240 static pthread_t flush_thread;
241 static pthread_cond_t flush_cond = PTHREAD_COND_INITIALIZER;
243 static pthread_mutex_t connection_threads_lock = PTHREAD_MUTEX_INITIALIZER;
244 static pthread_cond_t connection_threads_done = PTHREAD_COND_INITIALIZER;
245 static int connection_threads_num = 0;
247 /* Cache stuff */
248 static GTree *cache_tree = NULL;
249 static cache_item_t *cache_queue_head = NULL;
250 static cache_item_t *cache_queue_tail = NULL;
251 static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
253 static int config_write_interval = 300;
254 static int config_write_jitter = 0;
255 static int config_flush_interval = 3600;
256 static int config_flush_at_shutdown = 0;
257 static char *config_pid_file = NULL;
258 static char *config_base_dir = NULL;
259 static size_t _config_base_dir_len = 0;
260 static int config_write_base_only = 0;
261 static size_t config_alloc_chunk = 1;
263 static listen_socket_t **config_listen_address_list = NULL;
264 static size_t config_listen_address_list_len = 0;
266 static uint64_t stats_queue_length = 0;
267 static uint64_t stats_updates_received = 0;
268 static uint64_t stats_flush_received = 0;
269 static uint64_t stats_updates_written = 0;
270 static uint64_t stats_data_sets_written = 0;
271 static uint64_t stats_journal_bytes = 0;
272 static uint64_t stats_journal_rotate = 0;
273 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
275 /* Journaled updates */
276 #define JOURNAL_REPLAY(s) ((s) == NULL)
277 #define JOURNAL_BASE "rrd.journal"
278 static journal_set *journal_cur = NULL;
279 static journal_set *journal_old = NULL;
280 static char *journal_dir = NULL;
281 static FILE *journal_fh = NULL; /* current journal file handle */
282 static long journal_size = 0; /* current journal size */
283 #define JOURNAL_MAX (1 * 1024 * 1024 * 1024)
284 static pthread_mutex_t journal_lock = PTHREAD_MUTEX_INITIALIZER;
285 static int journal_write(char *cmd, char *args);
286 static void journal_done(void);
287 static void journal_rotate(void);
289 /* prototypes for forward refernces */
290 static int handle_request_help (HANDLER_PROTO);
292 /*
293 * Functions
294 */
295 static void sig_common (const char *sig) /* {{{ */
296 {
297 RRDD_LOG(LOG_NOTICE, "caught SIG%s", sig);
298 state = FLUSHING;
299 pthread_cond_broadcast(&flush_cond);
300 pthread_cond_broadcast(&queue_cond);
301 } /* }}} void sig_common */
303 static void sig_int_handler (int UNUSED(s)) /* {{{ */
304 {
305 sig_common("INT");
306 } /* }}} void sig_int_handler */
308 static void sig_term_handler (int UNUSED(s)) /* {{{ */
309 {
310 sig_common("TERM");
311 } /* }}} void sig_term_handler */
313 static void sig_usr1_handler (int UNUSED(s)) /* {{{ */
314 {
315 config_flush_at_shutdown = 1;
316 sig_common("USR1");
317 } /* }}} void sig_usr1_handler */
319 static void sig_usr2_handler (int UNUSED(s)) /* {{{ */
320 {
321 config_flush_at_shutdown = 0;
322 sig_common("USR2");
323 } /* }}} void sig_usr2_handler */
325 static void install_signal_handlers(void) /* {{{ */
326 {
327 /* These structures are static, because `sigaction' behaves weird if the are
328 * overwritten.. */
329 static struct sigaction sa_int;
330 static struct sigaction sa_term;
331 static struct sigaction sa_pipe;
332 static struct sigaction sa_usr1;
333 static struct sigaction sa_usr2;
335 /* Install signal handlers */
336 memset (&sa_int, 0, sizeof (sa_int));
337 sa_int.sa_handler = sig_int_handler;
338 sigaction (SIGINT, &sa_int, NULL);
340 memset (&sa_term, 0, sizeof (sa_term));
341 sa_term.sa_handler = sig_term_handler;
342 sigaction (SIGTERM, &sa_term, NULL);
344 memset (&sa_pipe, 0, sizeof (sa_pipe));
345 sa_pipe.sa_handler = SIG_IGN;
346 sigaction (SIGPIPE, &sa_pipe, NULL);
348 memset (&sa_pipe, 0, sizeof (sa_usr1));
349 sa_usr1.sa_handler = sig_usr1_handler;
350 sigaction (SIGUSR1, &sa_usr1, NULL);
352 memset (&sa_usr2, 0, sizeof (sa_usr2));
353 sa_usr2.sa_handler = sig_usr2_handler;
354 sigaction (SIGUSR2, &sa_usr2, NULL);
356 } /* }}} void install_signal_handlers */
358 static int open_pidfile(char *action, int oflag) /* {{{ */
359 {
360 int fd;
361 const char *file;
362 char *file_copy, *dir;
364 file = (config_pid_file != NULL)
365 ? config_pid_file
366 : LOCALSTATEDIR "/run/rrdcached.pid";
368 /* dirname may modify its argument */
369 file_copy = strdup(file);
370 if (file_copy == NULL)
371 {
372 fprintf(stderr, "rrdcached: strdup(): %s\n",
373 rrd_strerror(errno));
374 return -1;
375 }
377 dir = dirname(file_copy);
378 if (rrd_mkdir_p(dir, 0777) != 0)
379 {
380 fprintf(stderr, "Failed to create pidfile directory '%s': %s\n",
381 dir, rrd_strerror(errno));
382 return -1;
383 }
385 free(file_copy);
387 fd = open(file, oflag, S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH);
388 if (fd < 0)
389 fprintf(stderr, "rrdcached: can't %s pid file '%s' (%s)\n",
390 action, file, rrd_strerror(errno));
392 return(fd);
393 } /* }}} static int open_pidfile */
395 /* check existing pid file to see whether a daemon is running */
396 static int check_pidfile(void)
397 {
398 int pid_fd;
399 pid_t pid;
400 char pid_str[16];
402 pid_fd = open_pidfile("open", O_RDWR);
403 if (pid_fd < 0)
404 return pid_fd;
406 if (read(pid_fd, pid_str, sizeof(pid_str)) <= 0)
407 return -1;
409 pid = atoi(pid_str);
410 if (pid <= 0)
411 return -1;
413 /* another running process that we can signal COULD be
414 * a competing rrdcached */
415 if (pid != getpid() && kill(pid, 0) == 0)
416 {
417 fprintf(stderr,
418 "FATAL: Another rrdcached daemon is running?? (pid %d)\n", pid);
419 close(pid_fd);
420 return -1;
421 }
423 lseek(pid_fd, 0, SEEK_SET);
424 if (ftruncate(pid_fd, 0) == -1)
425 {
426 fprintf(stderr,
427 "FATAL: Faild to truncate stale PID file. (pid %d)\n", pid);
428 close(pid_fd);
429 return -1;
430 }
432 fprintf(stderr,
433 "rrdcached: removed stale PID file (no rrdcached on pid %d)\n"
434 "rrdcached: starting normally.\n", pid);
436 return pid_fd;
437 } /* }}} static int check_pidfile */
439 static int write_pidfile (int fd) /* {{{ */
440 {
441 pid_t pid;
442 FILE *fh;
444 pid = getpid ();
446 fh = fdopen (fd, "w");
447 if (fh == NULL)
448 {
449 RRDD_LOG (LOG_ERR, "write_pidfile: fdopen() failed.");
450 close(fd);
451 return (-1);
452 }
454 fprintf (fh, "%i\n", (int) pid);
455 fclose (fh);
457 return (0);
458 } /* }}} int write_pidfile */
460 static int remove_pidfile (void) /* {{{ */
461 {
462 char *file;
463 int status;
465 file = (config_pid_file != NULL)
466 ? config_pid_file
467 : LOCALSTATEDIR "/run/rrdcached.pid";
469 status = unlink (file);
470 if (status == 0)
471 return (0);
472 return (errno);
473 } /* }}} int remove_pidfile */
475 static char *next_cmd (listen_socket_t *sock, ssize_t *len) /* {{{ */
476 {
477 char *eol;
479 eol = memchr(sock->rbuf + sock->next_cmd, '\n',
480 sock->next_read - sock->next_cmd);
482 if (eol == NULL)
483 {
484 /* no commands left, move remainder back to front of rbuf */
485 memmove(sock->rbuf, sock->rbuf + sock->next_cmd,
486 sock->next_read - sock->next_cmd);
487 sock->next_read -= sock->next_cmd;
488 sock->next_cmd = 0;
489 *len = 0;
490 return NULL;
491 }
492 else
493 {
494 char *cmd = sock->rbuf + sock->next_cmd;
495 *eol = '\0';
497 sock->next_cmd = eol - sock->rbuf + 1;
499 if (eol > sock->rbuf && *(eol-1) == '\r')
500 *(--eol) = '\0'; /* handle "\r\n" EOL */
502 *len = eol - cmd;
504 return cmd;
505 }
507 /* NOTREACHED */
508 assert(1==0);
509 } /* }}} char *next_cmd */
511 /* add the characters directly to the write buffer */
512 static int add_to_wbuf(listen_socket_t *sock, char *str, size_t len) /* {{{ */
513 {
514 char *new_buf;
516 assert(sock != NULL);
518 new_buf = rrd_realloc(sock->wbuf, sock->wbuf_len + len + 1);
519 if (new_buf == NULL)
520 {
521 RRDD_LOG(LOG_ERR, "add_to_wbuf: realloc failed");
522 return -1;
523 }
525 strncpy(new_buf + sock->wbuf_len, str, len + 1);
527 sock->wbuf = new_buf;
528 sock->wbuf_len += len;
530 return 0;
531 } /* }}} static int add_to_wbuf */
533 /* add the text to the "extra" info that's sent after the status line */
534 static int add_response_info(listen_socket_t *sock, char *fmt, ...) /* {{{ */
535 {
536 va_list argp;
537 char buffer[CMD_MAX];
538 int len;
540 if (JOURNAL_REPLAY(sock)) return 0;
541 if (sock->batch_start) return 0; /* no extra info returned when in BATCH */
543 va_start(argp, fmt);
544 #ifdef HAVE_VSNPRINTF
545 len = vsnprintf(buffer, sizeof(buffer), fmt, argp);
546 #else
547 len = vsprintf(buffer, fmt, argp);
548 #endif
549 va_end(argp);
550 if (len < 0)
551 {
552 RRDD_LOG(LOG_ERR, "add_response_info: vnsprintf failed");
553 return -1;
554 }
556 return add_to_wbuf(sock, buffer, len);
557 } /* }}} static int add_response_info */
559 static int count_lines(char *str) /* {{{ */
560 {
561 int lines = 0;
563 if (str != NULL)
564 {
565 while ((str = strchr(str, '\n')) != NULL)
566 {
567 ++lines;
568 ++str;
569 }
570 }
572 return lines;
573 } /* }}} static int count_lines */
575 /* send the response back to the user.
576 * returns 0 on success, -1 on error
577 * write buffer is always zeroed after this call */
578 static int send_response (listen_socket_t *sock, response_code rc,
579 char *fmt, ...) /* {{{ */
580 {
581 va_list argp;
582 char buffer[CMD_MAX];
583 int lines;
584 ssize_t wrote;
585 int rclen, len;
587 if (JOURNAL_REPLAY(sock)) return rc;
589 if (sock->batch_start)
590 {
591 if (rc == RESP_OK)
592 return rc; /* no response on success during BATCH */
593 lines = sock->batch_cmd;
594 }
595 else if (rc == RESP_OK)
596 lines = count_lines(sock->wbuf);
597 else
598 lines = -1;
600 rclen = sprintf(buffer, "%d ", lines);
601 va_start(argp, fmt);
602 #ifdef HAVE_VSNPRINTF
603 len = vsnprintf(buffer+rclen, sizeof(buffer)-rclen, fmt, argp);
604 #else
605 len = vsprintf(buffer+rclen, fmt, argp);
606 #endif
607 va_end(argp);
608 if (len < 0)
609 return -1;
611 len += rclen;
613 /* append the result to the wbuf, don't write to the user */
614 if (sock->batch_start)
615 return add_to_wbuf(sock, buffer, len);
617 /* first write must be complete */
618 if (len != write(sock->fd, buffer, len))
619 {
620 RRDD_LOG(LOG_INFO, "send_response: could not write status message");
621 return -1;
622 }
624 if (sock->wbuf != NULL && rc == RESP_OK)
625 {
626 wrote = 0;
627 while (wrote < sock->wbuf_len)
628 {
629 ssize_t wb = write(sock->fd, sock->wbuf + wrote, sock->wbuf_len - wrote);
630 if (wb <= 0)
631 {
632 RRDD_LOG(LOG_INFO, "send_response: could not write results");
633 return -1;
634 }
635 wrote += wb;
636 }
637 }
639 free(sock->wbuf); sock->wbuf = NULL;
640 sock->wbuf_len = 0;
642 return 0;
643 } /* }}} */
645 static void wipe_ci_values(cache_item_t *ci, time_t when)
646 {
647 ci->values = NULL;
648 ci->values_num = 0;
649 ci->values_alloc = 0;
651 ci->last_flush_time = when;
652 if (config_write_jitter > 0)
653 ci->last_flush_time += (rrd_random() % config_write_jitter);
654 }
656 /* remove_from_queue
657 * remove a "cache_item_t" item from the queue.
658 * must hold 'cache_lock' when calling this
659 */
660 static void remove_from_queue(cache_item_t *ci) /* {{{ */
661 {
662 if (ci == NULL) return;
663 if ((ci->flags & CI_FLAGS_IN_QUEUE) == 0) return; /* not queued */
665 if (ci->prev == NULL)
666 cache_queue_head = ci->next; /* reset head */
667 else
668 ci->prev->next = ci->next;
670 if (ci->next == NULL)
671 cache_queue_tail = ci->prev; /* reset the tail */
672 else
673 ci->next->prev = ci->prev;
675 ci->next = ci->prev = NULL;
676 ci->flags &= ~CI_FLAGS_IN_QUEUE;
678 pthread_mutex_lock (&stats_lock);
679 assert (stats_queue_length > 0);
680 stats_queue_length--;
681 pthread_mutex_unlock (&stats_lock);
683 } /* }}} static void remove_from_queue */
685 /* free the resources associated with the cache_item_t
686 * must hold cache_lock when calling this function
687 */
688 static void *free_cache_item(cache_item_t *ci) /* {{{ */
689 {
690 if (ci == NULL) return NULL;
692 remove_from_queue(ci);
694 for (size_t i=0; i < ci->values_num; i++)
695 free(ci->values[i]);
697 free (ci->values);
698 free (ci->file);
700 /* in case anyone is waiting */
701 pthread_cond_broadcast(&ci->flushed);
702 pthread_cond_destroy(&ci->flushed);
704 free (ci);
706 return NULL;
707 } /* }}} static void *free_cache_item */
709 /*
710 * enqueue_cache_item:
711 * `cache_lock' must be acquired before calling this function!
712 */
713 static int enqueue_cache_item (cache_item_t *ci, /* {{{ */
714 queue_side_t side)
715 {
716 if (ci == NULL)
717 return (-1);
719 if (ci->values_num == 0)
720 return (0);
722 if (side == HEAD)
723 {
724 if (cache_queue_head == ci)
725 return 0;
727 /* remove if further down in queue */
728 remove_from_queue(ci);
730 ci->prev = NULL;
731 ci->next = cache_queue_head;
732 if (ci->next != NULL)
733 ci->next->prev = ci;
734 cache_queue_head = ci;
736 if (cache_queue_tail == NULL)
737 cache_queue_tail = cache_queue_head;
738 }
739 else /* (side == TAIL) */
740 {
741 /* We don't move values back in the list.. */
742 if (ci->flags & CI_FLAGS_IN_QUEUE)
743 return (0);
745 assert (ci->next == NULL);
746 assert (ci->prev == NULL);
748 ci->prev = cache_queue_tail;
750 if (cache_queue_tail == NULL)
751 cache_queue_head = ci;
752 else
753 cache_queue_tail->next = ci;
755 cache_queue_tail = ci;
756 }
758 ci->flags |= CI_FLAGS_IN_QUEUE;
760 pthread_cond_signal(&queue_cond);
761 pthread_mutex_lock (&stats_lock);
762 stats_queue_length++;
763 pthread_mutex_unlock (&stats_lock);
765 return (0);
766 } /* }}} int enqueue_cache_item */
768 /*
769 * tree_callback_flush:
770 * Called via `g_tree_foreach' in `flush_thread_main'. `cache_lock' is held
771 * while this is in progress.
772 */
773 static gboolean tree_callback_flush (gpointer key, gpointer value, /* {{{ */
774 gpointer data)
775 {
776 cache_item_t *ci;
777 callback_flush_data_t *cfd;
779 ci = (cache_item_t *) value;
780 cfd = (callback_flush_data_t *) data;
782 if (ci->flags & CI_FLAGS_IN_QUEUE)
783 return FALSE;
785 if (ci->values_num > 0
786 && (ci->last_flush_time <= cfd->abs_timeout || state != RUNNING))
787 {
788 enqueue_cache_item (ci, TAIL);
789 }
790 else if (((cfd->now - ci->last_flush_time) >= config_flush_interval)
791 && (ci->values_num <= 0))
792 {
793 assert ((char *) key == ci->file);
794 if (!rrd_add_ptr((void ***)&cfd->keys, &cfd->keys_num, (void *)key))
795 {
796 RRDD_LOG (LOG_ERR, "tree_callback_flush: rrd_add_ptrs failed.");
797 return (FALSE);
798 }
799 }
801 return (FALSE);
802 } /* }}} gboolean tree_callback_flush */
804 static int flush_old_values (int max_age)
805 {
806 callback_flush_data_t cfd;
807 size_t k;
809 memset (&cfd, 0, sizeof (cfd));
810 /* Pass the current time as user data so that we don't need to call
811 * `time' for each node. */
812 cfd.now = time (NULL);
813 cfd.keys = NULL;
814 cfd.keys_num = 0;
816 if (max_age > 0)
817 cfd.abs_timeout = cfd.now - max_age;
818 else
819 cfd.abs_timeout = cfd.now + 2*config_write_jitter + 1;
821 /* `tree_callback_flush' will return the keys of all values that haven't
822 * been touched in the last `config_flush_interval' seconds in `cfd'.
823 * The char*'s in this array point to the same memory as ci->file, so we
824 * don't need to free them separately. */
825 g_tree_foreach (cache_tree, tree_callback_flush, (gpointer) &cfd);
827 for (k = 0; k < cfd.keys_num; k++)
828 {
829 gboolean status = g_tree_remove(cache_tree, cfd.keys[k]);
830 /* should never fail, since we have held the cache_lock
831 * the entire time */
832 assert(status == TRUE);
833 }
835 if (cfd.keys != NULL)
836 {
837 free (cfd.keys);
838 cfd.keys = NULL;
839 }
841 return (0);
842 } /* int flush_old_values */
844 static void *flush_thread_main (void UNUSED(*args)) /* {{{ */
845 {
846 struct timeval now;
847 struct timespec next_flush;
848 int status;
850 gettimeofday (&now, NULL);
851 next_flush.tv_sec = now.tv_sec + config_flush_interval;
852 next_flush.tv_nsec = 1000 * now.tv_usec;
854 pthread_mutex_lock(&cache_lock);
856 while (state == RUNNING)
857 {
858 gettimeofday (&now, NULL);
859 if ((now.tv_sec > next_flush.tv_sec)
860 || ((now.tv_sec == next_flush.tv_sec)
861 && ((1000 * now.tv_usec) > next_flush.tv_nsec)))
862 {
863 RRDD_LOG(LOG_DEBUG, "flushing old values");
865 /* Determine the time of the next cache flush. */
866 next_flush.tv_sec = now.tv_sec + config_flush_interval;
868 /* Flush all values that haven't been written in the last
869 * `config_write_interval' seconds. */
870 flush_old_values (config_write_interval);
872 /* unlock the cache while we rotate so we don't block incoming
873 * updates if the fsync() blocks on disk I/O */
874 pthread_mutex_unlock(&cache_lock);
875 journal_rotate();
876 pthread_mutex_lock(&cache_lock);
877 }
879 status = pthread_cond_timedwait(&flush_cond, &cache_lock, &next_flush);
880 if (status != 0 && status != ETIMEDOUT)
881 {
882 RRDD_LOG (LOG_ERR, "flush_thread_main: "
883 "pthread_cond_timedwait returned %i.", status);
884 }
885 }
887 if (config_flush_at_shutdown)
888 flush_old_values (-1); /* flush everything */
890 state = SHUTDOWN;
892 pthread_mutex_unlock(&cache_lock);
894 return NULL;
895 } /* void *flush_thread_main */
897 static void *queue_thread_main (void UNUSED(*args)) /* {{{ */
898 {
899 pthread_mutex_lock (&cache_lock);
901 while (state != SHUTDOWN
902 || (cache_queue_head != NULL && config_flush_at_shutdown))
903 {
904 cache_item_t *ci;
905 char *file;
906 char **values;
907 size_t values_num;
908 int status;
910 /* Now, check if there's something to store away. If not, wait until
911 * something comes in. */
912 if (cache_queue_head == NULL)
913 {
914 status = pthread_cond_wait (&queue_cond, &cache_lock);
915 if ((status != 0) && (status != ETIMEDOUT))
916 {
917 RRDD_LOG (LOG_ERR, "queue_thread_main: "
918 "pthread_cond_wait returned %i.", status);
919 }
920 }
922 /* Check if a value has arrived. This may be NULL if we timed out or there
923 * was an interrupt such as a signal. */
924 if (cache_queue_head == NULL)
925 continue;
927 ci = cache_queue_head;
929 /* copy the relevant parts */
930 file = strdup (ci->file);
931 if (file == NULL)
932 {
933 RRDD_LOG (LOG_ERR, "queue_thread_main: strdup failed.");
934 continue;
935 }
937 assert(ci->values != NULL);
938 assert(ci->values_num > 0);
940 values = ci->values;
941 values_num = ci->values_num;
943 wipe_ci_values(ci, time(NULL));
944 remove_from_queue(ci);
946 pthread_mutex_unlock (&cache_lock);
948 rrd_clear_error ();
949 status = rrd_update_r (file, NULL, (int) values_num, (void *) values);
950 if (status != 0)
951 {
952 RRDD_LOG (LOG_NOTICE, "queue_thread_main: "
953 "rrd_update_r (%s) failed with status %i. (%s)",
954 file, status, rrd_get_error());
955 }
957 journal_write("wrote", file);
959 /* Search again in the tree. It's possible someone issued a "FORGET"
960 * while we were writing the update values. */
961 pthread_mutex_lock(&cache_lock);
962 ci = (cache_item_t *) g_tree_lookup(cache_tree, file);
963 if (ci)
964 pthread_cond_broadcast(&ci->flushed);
965 pthread_mutex_unlock(&cache_lock);
967 if (status == 0)
968 {
969 pthread_mutex_lock (&stats_lock);
970 stats_updates_written++;
971 stats_data_sets_written += values_num;
972 pthread_mutex_unlock (&stats_lock);
973 }
975 rrd_free_ptrs((void ***) &values, &values_num);
976 free(file);
978 pthread_mutex_lock (&cache_lock);
979 }
980 pthread_mutex_unlock (&cache_lock);
982 return (NULL);
983 } /* }}} void *queue_thread_main */
985 static int buffer_get_field (char **buffer_ret, /* {{{ */
986 size_t *buffer_size_ret, char **field_ret)
987 {
988 char *buffer;
989 size_t buffer_pos;
990 size_t buffer_size;
991 char *field;
992 size_t field_size;
993 int status;
995 buffer = *buffer_ret;
996 buffer_pos = 0;
997 buffer_size = *buffer_size_ret;
998 field = *buffer_ret;
999 field_size = 0;
1001 if (buffer_size <= 0)
1002 return (-1);
1004 /* This is ensured by `handle_request'. */
1005 assert (buffer[buffer_size - 1] == '\0');
1007 status = -1;
1008 while (buffer_pos < buffer_size)
1009 {
1010 /* Check for end-of-field or end-of-buffer */
1011 if (buffer[buffer_pos] == ' ' || buffer[buffer_pos] == '\0')
1012 {
1013 field[field_size] = 0;
1014 field_size++;
1015 buffer_pos++;
1016 status = 0;
1017 break;
1018 }
1019 /* Handle escaped characters. */
1020 else if (buffer[buffer_pos] == '\\')
1021 {
1022 if (buffer_pos >= (buffer_size - 1))
1023 break;
1024 buffer_pos++;
1025 field[field_size] = buffer[buffer_pos];
1026 field_size++;
1027 buffer_pos++;
1028 }
1029 /* Normal operation */
1030 else
1031 {
1032 field[field_size] = buffer[buffer_pos];
1033 field_size++;
1034 buffer_pos++;
1035 }
1036 } /* while (buffer_pos < buffer_size) */
1038 if (status != 0)
1039 return (status);
1041 *buffer_ret = buffer + buffer_pos;
1042 *buffer_size_ret = buffer_size - buffer_pos;
1043 *field_ret = field;
1045 return (0);
1046 } /* }}} int buffer_get_field */
1048 /* if we're restricting writes to the base directory,
1049 * check whether the file falls within the dir
1050 * returns 1 if OK, otherwise 0
1051 */
1052 static int check_file_access (const char *file, listen_socket_t *sock) /* {{{ */
1053 {
1054 assert(file != NULL);
1056 if (!config_write_base_only
1057 || JOURNAL_REPLAY(sock)
1058 || config_base_dir == NULL)
1059 return 1;
1061 if (strstr(file, "../") != NULL) goto err;
1063 /* relative paths without "../" are ok */
1064 if (*file != '/') return 1;
1066 /* file must be of the format base + "/" + <1+ char filename> */
1067 if (strlen(file) < _config_base_dir_len + 2) goto err;
1068 if (strncmp(file, config_base_dir, _config_base_dir_len) != 0) goto err;
1069 if (*(file + _config_base_dir_len) != '/') goto err;
1071 return 1;
1073 err:
1074 if (sock != NULL && sock->fd >= 0)
1075 send_response(sock, RESP_ERR, "%s\n", rrd_strerror(EACCES));
1077 return 0;
1078 } /* }}} static int check_file_access */
1080 /* when using a base dir, convert relative paths to absolute paths.
1081 * if necessary, modifies the "filename" pointer to point
1082 * to the new path created in "tmp". "tmp" is provided
1083 * by the caller and sizeof(tmp) must be >= PATH_MAX.
1084 *
1085 * this allows us to optimize for the expected case (absolute path)
1086 * with a no-op.
1087 */
1088 static void get_abs_path(char **filename, char *tmp)
1089 {
1090 assert(tmp != NULL);
1091 assert(filename != NULL && *filename != NULL);
1093 if (config_base_dir == NULL || **filename == '/')
1094 return;
1096 snprintf(tmp, PATH_MAX, "%s/%s", config_base_dir, *filename);
1097 *filename = tmp;
1098 } /* }}} static int get_abs_path */
1100 static int flush_file (const char *filename) /* {{{ */
1101 {
1102 cache_item_t *ci;
1104 pthread_mutex_lock (&cache_lock);
1106 ci = (cache_item_t *) g_tree_lookup (cache_tree, filename);
1107 if (ci == NULL)
1108 {
1109 pthread_mutex_unlock (&cache_lock);
1110 return (ENOENT);
1111 }
1113 if (ci->values_num > 0)
1114 {
1115 /* Enqueue at head */
1116 enqueue_cache_item (ci, HEAD);
1117 pthread_cond_wait(&ci->flushed, &cache_lock);
1118 }
1120 /* DO NOT DO ANYTHING WITH ci HERE!! The entry
1121 * may have been purged during our cond_wait() */
1123 pthread_mutex_unlock(&cache_lock);
1125 return (0);
1126 } /* }}} int flush_file */
1128 static int syntax_error(listen_socket_t *sock, command_t *cmd) /* {{{ */
1129 {
1130 char *err = "Syntax error.\n";
1132 if (cmd && cmd->syntax)
1133 err = cmd->syntax;
1135 return send_response(sock, RESP_ERR, "Usage: %s", err);
1136 } /* }}} static int syntax_error() */
1138 static int handle_request_stats (HANDLER_PROTO) /* {{{ */
1139 {
1140 uint64_t copy_queue_length;
1141 uint64_t copy_updates_received;
1142 uint64_t copy_flush_received;
1143 uint64_t copy_updates_written;
1144 uint64_t copy_data_sets_written;
1145 uint64_t copy_journal_bytes;
1146 uint64_t copy_journal_rotate;
1148 uint64_t tree_nodes_number;
1149 uint64_t tree_depth;
1151 pthread_mutex_lock (&stats_lock);
1152 copy_queue_length = stats_queue_length;
1153 copy_updates_received = stats_updates_received;
1154 copy_flush_received = stats_flush_received;
1155 copy_updates_written = stats_updates_written;
1156 copy_data_sets_written = stats_data_sets_written;
1157 copy_journal_bytes = stats_journal_bytes;
1158 copy_journal_rotate = stats_journal_rotate;
1159 pthread_mutex_unlock (&stats_lock);
1161 pthread_mutex_lock (&cache_lock);
1162 tree_nodes_number = (uint64_t) g_tree_nnodes (cache_tree);
1163 tree_depth = (uint64_t) g_tree_height (cache_tree);
1164 pthread_mutex_unlock (&cache_lock);
1166 add_response_info(sock,
1167 "QueueLength: %"PRIu64"\n", copy_queue_length);
1168 add_response_info(sock,
1169 "UpdatesReceived: %"PRIu64"\n", copy_updates_received);
1170 add_response_info(sock,
1171 "FlushesReceived: %"PRIu64"\n", copy_flush_received);
1172 add_response_info(sock,
1173 "UpdatesWritten: %"PRIu64"\n", copy_updates_written);
1174 add_response_info(sock,
1175 "DataSetsWritten: %"PRIu64"\n", copy_data_sets_written);
1176 add_response_info(sock, "TreeNodesNumber: %"PRIu64"\n", tree_nodes_number);
1177 add_response_info(sock, "TreeDepth: %"PRIu64"\n", tree_depth);
1178 add_response_info(sock, "JournalBytes: %"PRIu64"\n", copy_journal_bytes);
1179 add_response_info(sock, "JournalRotate: %"PRIu64"\n", copy_journal_rotate);
1181 send_response(sock, RESP_OK, "Statistics follow\n");
1183 return (0);
1184 } /* }}} int handle_request_stats */
1186 static int handle_request_flush (HANDLER_PROTO) /* {{{ */
1187 {
1188 char *file, file_tmp[PATH_MAX];
1189 int status;
1191 status = buffer_get_field (&buffer, &buffer_size, &file);
1192 if (status != 0)
1193 {
1194 return syntax_error(sock,cmd);
1195 }
1196 else
1197 {
1198 pthread_mutex_lock(&stats_lock);
1199 stats_flush_received++;
1200 pthread_mutex_unlock(&stats_lock);
1202 get_abs_path(&file, file_tmp);
1203 if (!check_file_access(file, sock)) return 0;
1205 status = flush_file (file);
1206 if (status == 0)
1207 return send_response(sock, RESP_OK, "Successfully flushed %s.\n", file);
1208 else if (status == ENOENT)
1209 {
1210 /* no file in our tree; see whether it exists at all */
1211 struct stat statbuf;
1213 memset(&statbuf, 0, sizeof(statbuf));
1214 if (stat(file, &statbuf) == 0 && S_ISREG(statbuf.st_mode))
1215 return send_response(sock, RESP_OK, "Nothing to flush: %s.\n", file);
1216 else
1217 return send_response(sock, RESP_ERR, "No such file: %s.\n", file);
1218 }
1219 else if (status < 0)
1220 return send_response(sock, RESP_ERR, "Internal error.\n");
1221 else
1222 return send_response(sock, RESP_ERR, "Failed with status %i.\n", status);
1223 }
1225 /* NOTREACHED */
1226 assert(1==0);
1227 } /* }}} int handle_request_flush */
1229 static int handle_request_flushall(HANDLER_PROTO) /* {{{ */
1230 {
1231 RRDD_LOG(LOG_DEBUG, "Received FLUSHALL");
1233 pthread_mutex_lock(&cache_lock);
1234 flush_old_values(-1);
1235 pthread_mutex_unlock(&cache_lock);
1237 return send_response(sock, RESP_OK, "Started flush.\n");
1238 } /* }}} static int handle_request_flushall */
1240 static int handle_request_pending(HANDLER_PROTO) /* {{{ */
1241 {
1242 int status;
1243 char *file, file_tmp[PATH_MAX];
1244 cache_item_t *ci;
1246 status = buffer_get_field(&buffer, &buffer_size, &file);
1247 if (status != 0)
1248 return syntax_error(sock,cmd);
1250 get_abs_path(&file, file_tmp);
1252 pthread_mutex_lock(&cache_lock);
1253 ci = g_tree_lookup(cache_tree, file);
1254 if (ci == NULL)
1255 {
1256 pthread_mutex_unlock(&cache_lock);
1257 return send_response(sock, RESP_ERR, "%s\n", rrd_strerror(ENOENT));
1258 }
1260 for (size_t i=0; i < ci->values_num; i++)
1261 add_response_info(sock, "%s\n", ci->values[i]);
1263 pthread_mutex_unlock(&cache_lock);
1264 return send_response(sock, RESP_OK, "updates pending\n");
1265 } /* }}} static int handle_request_pending */
1267 static int handle_request_forget(HANDLER_PROTO) /* {{{ */
1268 {
1269 int status;
1270 gboolean found;
1271 char *file, file_tmp[PATH_MAX];
1273 status = buffer_get_field(&buffer, &buffer_size, &file);
1274 if (status != 0)
1275 return syntax_error(sock,cmd);
1277 get_abs_path(&file, file_tmp);
1278 if (!check_file_access(file, sock)) return 0;
1280 pthread_mutex_lock(&cache_lock);
1281 found = g_tree_remove(cache_tree, file);
1282 pthread_mutex_unlock(&cache_lock);
1284 if (found == TRUE)
1285 {
1286 if (!JOURNAL_REPLAY(sock))
1287 journal_write("forget", file);
1289 return send_response(sock, RESP_OK, "Gone!\n");
1290 }
1291 else
1292 return send_response(sock, RESP_ERR, "%s\n", rrd_strerror(ENOENT));
1294 /* NOTREACHED */
1295 assert(1==0);
1296 } /* }}} static int handle_request_forget */
1298 static int handle_request_queue (HANDLER_PROTO) /* {{{ */
1299 {
1300 cache_item_t *ci;
1302 pthread_mutex_lock(&cache_lock);
1304 ci = cache_queue_head;
1305 while (ci != NULL)
1306 {
1307 add_response_info(sock, "%d %s\n", ci->values_num, ci->file);
1308 ci = ci->next;
1309 }
1311 pthread_mutex_unlock(&cache_lock);
1313 return send_response(sock, RESP_OK, "in queue.\n");
1314 } /* }}} int handle_request_queue */
1316 static int handle_request_update (HANDLER_PROTO) /* {{{ */
1317 {
1318 char *file, file_tmp[PATH_MAX];
1319 int values_num = 0;
1320 int status;
1321 char orig_buf[CMD_MAX];
1323 cache_item_t *ci;
1325 /* save it for the journal later */
1326 if (!JOURNAL_REPLAY(sock))
1327 strncpy(orig_buf, buffer, buffer_size);
1329 status = buffer_get_field (&buffer, &buffer_size, &file);
1330 if (status != 0)
1331 return syntax_error(sock,cmd);
1333 pthread_mutex_lock(&stats_lock);
1334 stats_updates_received++;
1335 pthread_mutex_unlock(&stats_lock);
1337 get_abs_path(&file, file_tmp);
1338 if (!check_file_access(file, sock)) return 0;
1340 pthread_mutex_lock (&cache_lock);
1341 ci = g_tree_lookup (cache_tree, file);
1343 if (ci == NULL) /* {{{ */
1344 {
1345 struct stat statbuf;
1346 cache_item_t *tmp;
1348 /* don't hold the lock while we setup; stat(2) might block */
1349 pthread_mutex_unlock(&cache_lock);
1351 memset (&statbuf, 0, sizeof (statbuf));
1352 status = stat (file, &statbuf);
1353 if (status != 0)
1354 {
1355 RRDD_LOG (LOG_NOTICE, "handle_request_update: stat (%s) failed.", file);
1357 status = errno;
1358 if (status == ENOENT)
1359 return send_response(sock, RESP_ERR, "No such file: %s\n", file);
1360 else
1361 return send_response(sock, RESP_ERR,
1362 "stat failed with error %i.\n", status);
1363 }
1364 if (!S_ISREG (statbuf.st_mode))
1365 return send_response(sock, RESP_ERR, "Not a regular file: %s\n", file);
1367 if (access(file, R_OK|W_OK) != 0)
1368 return send_response(sock, RESP_ERR, "Cannot read/write %s: %s\n",
1369 file, rrd_strerror(errno));
1371 ci = (cache_item_t *) malloc (sizeof (cache_item_t));
1372 if (ci == NULL)
1373 {
1374 RRDD_LOG (LOG_ERR, "handle_request_update: malloc failed.");
1376 return send_response(sock, RESP_ERR, "malloc failed.\n");
1377 }
1378 memset (ci, 0, sizeof (cache_item_t));
1380 ci->file = strdup (file);
1381 if (ci->file == NULL)
1382 {
1383 free (ci);
1384 RRDD_LOG (LOG_ERR, "handle_request_update: strdup failed.");
1386 return send_response(sock, RESP_ERR, "strdup failed.\n");
1387 }
1389 wipe_ci_values(ci, now);
1390 ci->flags = CI_FLAGS_IN_TREE;
1391 pthread_cond_init(&ci->flushed, NULL);
1393 pthread_mutex_lock(&cache_lock);
1395 /* another UPDATE might have added this entry in the meantime */
1396 tmp = g_tree_lookup (cache_tree, file);
1397 if (tmp == NULL)
1398 g_tree_replace (cache_tree, (void *) ci->file, (void *) ci);
1399 else
1400 {
1401 free_cache_item (ci);
1402 ci = tmp;
1403 }
1405 /* state may have changed while we were unlocked */
1406 if (state == SHUTDOWN)
1407 return -1;
1408 } /* }}} */
1409 assert (ci != NULL);
1411 /* don't re-write updates in replay mode */
1412 if (!JOURNAL_REPLAY(sock))
1413 journal_write("update", orig_buf);
1415 while (buffer_size > 0)
1416 {
1417 char *value;
1418 time_t stamp;
1419 char *eostamp;
1421 status = buffer_get_field (&buffer, &buffer_size, &value);
1422 if (status != 0)
1423 {
1424 RRDD_LOG (LOG_INFO, "handle_request_update: Error reading field.");
1425 break;
1426 }
1428 /* make sure update time is always moving forward */
1429 stamp = strtol(value, &eostamp, 10);
1430 if (eostamp == value || eostamp == NULL || *eostamp != ':')
1431 {
1432 pthread_mutex_unlock(&cache_lock);
1433 return send_response(sock, RESP_ERR,
1434 "Cannot find timestamp in '%s'!\n", value);
1435 }
1436 else if (stamp <= ci->last_update_stamp)
1437 {
1438 pthread_mutex_unlock(&cache_lock);
1439 return send_response(sock, RESP_ERR,
1440 "illegal attempt to update using time %ld when last"
1441 " update time is %ld (minimum one second step)\n",
1442 stamp, ci->last_update_stamp);
1443 }
1444 else
1445 ci->last_update_stamp = stamp;
1447 if (!rrd_add_strdup_chunk(&ci->values, &ci->values_num, value,
1448 &ci->values_alloc, config_alloc_chunk))
1449 {
1450 RRDD_LOG (LOG_ERR, "handle_request_update: rrd_add_strdup failed.");
1451 continue;
1452 }
1454 values_num++;
1455 }
1457 if (((now - ci->last_flush_time) >= config_write_interval)
1458 && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0)
1459 && (ci->values_num > 0))
1460 {
1461 enqueue_cache_item (ci, TAIL);
1462 }
1464 pthread_mutex_unlock (&cache_lock);
1466 if (values_num < 1)
1467 return send_response(sock, RESP_ERR, "No values updated.\n");
1468 else
1469 return send_response(sock, RESP_OK,
1470 "errors, enqueued %i value(s).\n", values_num);
1472 /* NOTREACHED */
1473 assert(1==0);
1475 } /* }}} int handle_request_update */
1477 static int handle_request_fetch (HANDLER_PROTO) /* {{{ */
1478 {
1479 char *file;
1480 char *cf;
1482 char *start_str;
1483 char *end_str;
1484 time_t start_tm;
1485 time_t end_tm;
1487 unsigned long step;
1488 unsigned long ds_cnt;
1489 char **ds_namv;
1490 rrd_value_t *data;
1492 int status;
1493 unsigned long i;
1494 time_t t;
1495 rrd_value_t *data_ptr;
1497 file = NULL;
1498 cf = NULL;
1499 start_str = NULL;
1500 end_str = NULL;
1502 /* Read the arguments */
1503 do /* while (0) */
1504 {
1505 status = buffer_get_field (&buffer, &buffer_size, &file);
1506 if (status != 0)
1507 break;
1509 status = buffer_get_field (&buffer, &buffer_size, &cf);
1510 if (status != 0)
1511 break;
1513 status = buffer_get_field (&buffer, &buffer_size, &start_str);
1514 if (status != 0)
1515 {
1516 start_str = NULL;
1517 status = 0;
1518 break;
1519 }
1521 status = buffer_get_field (&buffer, &buffer_size, &end_str);
1522 if (status != 0)
1523 {
1524 end_str = NULL;
1525 status = 0;
1526 break;
1527 }
1528 } while (0);
1530 if (status != 0)
1531 return (syntax_error(sock,cmd));
1533 status = flush_file (file);
1534 if ((status != 0) && (status != ENOENT))
1535 return (send_response (sock, RESP_ERR,
1536 "flush_file (%s) failed with status %i.\n", file, status));
1538 t = time (NULL); /* "now" */
1540 /* Parse start time */
1541 if (start_str != NULL)
1542 {
1543 char *endptr;
1544 long value;
1546 endptr = NULL;
1547 errno = 0;
1548 value = strtol (start_str, &endptr, /* base = */ 0);
1549 if ((endptr == start_str) || (errno != 0))
1550 return (send_response(sock, RESP_ERR,
1551 "Cannot parse start time `%s': Only simple integers are allowed.\n",
1552 start_str));
1554 if (value > 0)
1555 start_tm = (time_t) value;
1556 else
1557 start_tm = (time_t) (t + value);
1558 }
1559 else
1560 {
1561 start_tm = t - 86400;
1562 }
1564 /* Parse end time */
1565 if (end_str != NULL)
1566 {
1567 char *endptr;
1568 long value;
1570 endptr = NULL;
1571 errno = 0;
1572 value = strtol (end_str, &endptr, /* base = */ 0);
1573 if ((endptr == end_str) || (errno != 0))
1574 return (send_response(sock, RESP_ERR,
1575 "Cannot parse end time `%s': Only simple integers are allowed.\n",
1576 end_str));
1578 if (value > 0)
1579 end_tm = (time_t) value;
1580 else
1581 end_tm = (time_t) (t + value);
1582 }
1583 else
1584 {
1585 end_tm = t;
1586 }
1588 step = -1;
1589 ds_cnt = 0;
1590 ds_namv = NULL;
1591 data = NULL;
1593 status = rrd_fetch_r (file, cf, &start_tm, &end_tm, &step,
1594 &ds_cnt, &ds_namv, &data);
1595 if (status != 0)
1596 return (send_response(sock, RESP_ERR,
1597 "rrd_fetch_r failed: %s\n", rrd_get_error ()));
1599 add_response_info (sock, "FlushVersion: %lu\n", 1);
1600 add_response_info (sock, "Start: %lu\n", (unsigned long) start_tm);
1601 add_response_info (sock, "End: %lu\n", (unsigned long) end_tm);
1602 add_response_info (sock, "Step: %lu\n", step);
1603 add_response_info (sock, "DSCount: %lu\n", ds_cnt);
1605 #define SSTRCAT(buffer,str,buffer_fill) do { \
1606 size_t str_len = strlen (str); \
1607 if ((buffer_fill + str_len) > sizeof (buffer)) \
1608 str_len = sizeof (buffer) - buffer_fill; \
1609 if (str_len > 0) { \
1610 strncpy (buffer + buffer_fill, str, str_len); \
1611 buffer_fill += str_len; \
1612 assert (buffer_fill <= sizeof (buffer)); \
1613 if (buffer_fill == sizeof (buffer)) \
1614 buffer[buffer_fill - 1] = 0; \
1615 else \
1616 buffer[buffer_fill] = 0; \
1617 } \
1618 } while (0)
1620 { /* Add list of DS names */
1621 char linebuf[1024];
1622 size_t linebuf_fill;
1624 memset (linebuf, 0, sizeof (linebuf));
1625 linebuf_fill = 0;
1626 for (i = 0; i < ds_cnt; i++)
1627 {
1628 if (i > 0)
1629 SSTRCAT (linebuf, " ", linebuf_fill);
1630 SSTRCAT (linebuf, ds_namv[i], linebuf_fill);
1631 rrd_freemem(ds_namv[i]);
1632 }
1633 rrd_freemem(ds_namv);
1634 add_response_info (sock, "DSName: %s\n", linebuf);
1635 }
1637 /* Add the actual data */
1638 assert (step > 0);
1639 data_ptr = data;
1640 for (t = start_tm + step; t <= end_tm; t += step)
1641 {
1642 char linebuf[1024];
1643 size_t linebuf_fill;
1644 char tmp[128];
1646 memset (linebuf, 0, sizeof (linebuf));
1647 linebuf_fill = 0;
1648 for (i = 0; i < ds_cnt; i++)
1649 {
1650 snprintf (tmp, sizeof (tmp), " %0.10e", *data_ptr);
1651 tmp[sizeof (tmp) - 1] = 0;
1652 SSTRCAT (linebuf, tmp, linebuf_fill);
1654 data_ptr++;
1655 }
1657 add_response_info (sock, "%10lu:%s\n", (unsigned long) t, linebuf);
1658 } /* for (t) */
1659 rrd_freemem(data);
1661 return (send_response (sock, RESP_OK, "Success\n"));
1662 #undef SSTRCAT
1663 } /* }}} int handle_request_fetch */
1665 /* we came across a "WROTE" entry during journal replay.
1666 * throw away any values that we have accumulated for this file
1667 */
1668 static int handle_request_wrote (HANDLER_PROTO) /* {{{ */
1669 {
1670 cache_item_t *ci;
1671 const char *file = buffer;
1673 pthread_mutex_lock(&cache_lock);
1675 ci = g_tree_lookup(cache_tree, file);
1676 if (ci == NULL)
1677 {
1678 pthread_mutex_unlock(&cache_lock);
1679 return (0);
1680 }
1682 if (ci->values)
1683 rrd_free_ptrs((void ***) &ci->values, &ci->values_num);
1685 wipe_ci_values(ci, now);
1686 remove_from_queue(ci);
1688 pthread_mutex_unlock(&cache_lock);
1689 return (0);
1690 } /* }}} int handle_request_wrote */
1692 /* start "BATCH" processing */
1693 static int batch_start (HANDLER_PROTO) /* {{{ */
1694 {
1695 int status;
1696 if (sock->batch_start)
1697 return send_response(sock, RESP_ERR, "Already in BATCH\n");
1699 status = send_response(sock, RESP_OK,
1700 "Go ahead. End with dot '.' on its own line.\n");
1701 sock->batch_start = time(NULL);
1702 sock->batch_cmd = 0;
1704 return status;
1705 } /* }}} static int batch_start */
1707 /* finish "BATCH" processing and return results to the client */
1708 static int batch_done (HANDLER_PROTO) /* {{{ */
1709 {
1710 assert(sock->batch_start);
1711 sock->batch_start = 0;
1712 sock->batch_cmd = 0;
1713 return send_response(sock, RESP_OK, "errors\n");
1714 } /* }}} static int batch_done */
1716 static int handle_request_quit (HANDLER_PROTO) /* {{{ */
1717 {
1718 return -1;
1719 } /* }}} static int handle_request_quit */
1721 static command_t list_of_commands[] = { /* {{{ */
1722 {
1723 "UPDATE",
1724 handle_request_update,
1725 CMD_CONTEXT_ANY,
1726 "UPDATE <filename> <values> [<values> ...]\n"
1727 ,
1728 "Adds the given file to the internal cache if it is not yet known and\n"
1729 "appends the given value(s) to the entry. See the rrdcached(1) manpage\n"
1730 "for details.\n"
1731 "\n"
1732 "Each <values> has the following form:\n"
1733 " <values> = <time>:<value>[:<value>[...]]\n"
1734 "See the rrdupdate(1) manpage for details.\n"
1735 },
1736 {
1737 "WROTE",
1738 handle_request_wrote,
1739 CMD_CONTEXT_JOURNAL,
1740 NULL,
1741 NULL
1742 },
1743 {
1744 "FLUSH",
1745 handle_request_flush,
1746 CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
1747 "FLUSH <filename>\n"
1748 ,
1749 "Adds the given filename to the head of the update queue and returns\n"
1750 "after it has been dequeued.\n"
1751 },
1752 {
1753 "FLUSHALL",
1754 handle_request_flushall,
1755 CMD_CONTEXT_CLIENT,
1756 "FLUSHALL\n"
1757 ,
1758 "Triggers writing of all pending updates. Returns immediately.\n"
1759 },
1760 {
1761 "PENDING",
1762 handle_request_pending,
1763 CMD_CONTEXT_CLIENT,
1764 "PENDING <filename>\n"
1765 ,
1766 "Shows any 'pending' updates for a file, in order.\n"
1767 "The updates shown have not yet been written to the underlying RRD file.\n"
1768 },
1769 {
1770 "FORGET",
1771 handle_request_forget,
1772 CMD_CONTEXT_ANY,
1773 "FORGET <filename>\n"
1774 ,
1775 "Removes the file completely from the cache.\n"
1776 "Any pending updates for the file will be lost.\n"
1777 },
1778 {
1779 "QUEUE",
1780 handle_request_queue,
1781 CMD_CONTEXT_CLIENT,
1782 "QUEUE\n"
1783 ,
1784 "Shows all files in the output queue.\n"
1785 "The output is zero or more lines in the following format:\n"
1786 "(where <num_vals> is the number of values to be written)\n"
1787 "\n"
1788 "<num_vals> <filename>\n"
1789 },
1790 {
1791 "STATS",
1792 handle_request_stats,
1793 CMD_CONTEXT_CLIENT,
1794 "STATS\n"
1795 ,
1796 "Returns some performance counters, see the rrdcached(1) manpage for\n"
1797 "a description of the values.\n"
1798 },
1799 {
1800 "HELP",
1801 handle_request_help,
1802 CMD_CONTEXT_CLIENT,
1803 "HELP [<command>]\n",
1804 NULL, /* special! */
1805 },
1806 {
1807 "BATCH",
1808 batch_start,
1809 CMD_CONTEXT_CLIENT,
1810 "BATCH\n"
1811 ,
1812 "The 'BATCH' command permits the client to initiate a bulk load\n"
1813 " of commands to rrdcached.\n"
1814 "\n"
1815 "Usage:\n"
1816 "\n"
1817 " client: BATCH\n"
1818 " server: 0 Go ahead. End with dot '.' on its own line.\n"
1819 " client: command #1\n"
1820 " client: command #2\n"
1821 " client: ... and so on\n"
1822 " client: .\n"
1823 " server: 2 errors\n"
1824 " server: 7 message for command #7\n"
1825 " server: 9 message for command #9\n"
1826 "\n"
1827 "For more information, consult the rrdcached(1) documentation.\n"
1828 },
1829 {
1830 ".", /* BATCH terminator */
1831 batch_done,
1832 CMD_CONTEXT_BATCH,
1833 NULL,
1834 NULL
1835 },
1836 {
1837 "FETCH",
1838 handle_request_fetch,
1839 CMD_CONTEXT_CLIENT,
1840 "FETCH <file> <CF> [<start> [<end>]]\n"
1841 ,
1842 "The 'FETCH' can be used by the client to retrieve values from an RRD file.\n"
1843 },
1844 {
1845 "QUIT",
1846 handle_request_quit,
1847 CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
1848 "QUIT\n"
1849 ,
1850 "Disconnect from rrdcached.\n"
1851 }
1852 }; /* }}} command_t list_of_commands[] */
1853 static size_t list_of_commands_len = sizeof (list_of_commands)
1854 / sizeof (list_of_commands[0]);
1856 static command_t *find_command(char *cmd)
1857 {
1858 size_t i;
1860 for (i = 0; i < list_of_commands_len; i++)
1861 if (strcasecmp(cmd, list_of_commands[i].cmd) == 0)
1862 return (&list_of_commands[i]);
1863 return NULL;
1864 }
1866 /* We currently use the index in the `list_of_commands' array as a bit position
1867 * in `listen_socket_t.permissions'. This member schould NEVER be accessed from
1868 * outside these functions so that switching to a more elegant storage method
1869 * is easily possible. */
1870 static ssize_t find_command_index (const char *cmd) /* {{{ */
1871 {
1872 size_t i;
1874 for (i = 0; i < list_of_commands_len; i++)
1875 if (strcasecmp(cmd, list_of_commands[i].cmd) == 0)
1876 return ((ssize_t) i);
1877 return (-1);
1878 } /* }}} ssize_t find_command_index */
1880 static int socket_permission_check (listen_socket_t *sock, /* {{{ */
1881 const char *cmd)
1882 {
1883 ssize_t i;
1885 if (JOURNAL_REPLAY(sock))
1886 return (1);
1888 if (cmd == NULL)
1889 return (-1);
1891 if ((strcasecmp ("QUIT", cmd) == 0)
1892 || (strcasecmp ("HELP", cmd) == 0))
1893 return (1);
1894 else if (strcmp (".", cmd) == 0)
1895 cmd = "BATCH";
1897 i = find_command_index (cmd);
1898 if (i < 0)
1899 return (-1);
1900 assert (i < 32);
1902 if ((sock->permissions & (1 << i)) != 0)
1903 return (1);
1904 return (0);
1905 } /* }}} int socket_permission_check */
1907 static int socket_permission_add (listen_socket_t *sock, /* {{{ */
1908 const char *cmd)
1909 {
1910 ssize_t i;
1912 i = find_command_index (cmd);
1913 if (i < 0)
1914 return (-1);
1915 assert (i < 32);
1917 sock->permissions |= (1 << i);
1918 return (0);
1919 } /* }}} int socket_permission_add */
1921 /* check whether commands are received in the expected context */
1922 static int command_check_context(listen_socket_t *sock, command_t *cmd)
1923 {
1924 if (JOURNAL_REPLAY(sock))
1925 return (cmd->context & CMD_CONTEXT_JOURNAL);
1926 else if (sock->batch_start)
1927 return (cmd->context & CMD_CONTEXT_BATCH);
1928 else
1929 return (cmd->context & CMD_CONTEXT_CLIENT);
1931 /* NOTREACHED */
1932 assert(1==0);
1933 }
1935 static int handle_request_help (HANDLER_PROTO) /* {{{ */
1936 {
1937 int status;
1938 char *cmd_str;
1939 char *resp_txt;
1940 command_t *help = NULL;
1942 status = buffer_get_field (&buffer, &buffer_size, &cmd_str);
1943 if (status == 0)
1944 help = find_command(cmd_str);
1946 if (help && (help->syntax || help->help))
1947 {
1948 char tmp[CMD_MAX];
1950 snprintf(tmp, sizeof(tmp)-1, "Help for %s\n", help->cmd);
1951 resp_txt = tmp;
1953 if (help->syntax)
1954 add_response_info(sock, "Usage: %s\n", help->syntax);
1956 if (help->help)
1957 add_response_info(sock, "%s\n", help->help);
1958 }
1959 else
1960 {
1961 size_t i;
1963 resp_txt = "Command overview\n";
1965 for (i = 0; i < list_of_commands_len; i++)
1966 {
1967 if (list_of_commands[i].syntax == NULL)
1968 continue;
1969 add_response_info (sock, "%s", list_of_commands[i].syntax);
1970 }
1971 }
1973 return send_response(sock, RESP_OK, resp_txt);
1974 } /* }}} int handle_request_help */
1976 static int handle_request (DISPATCH_PROTO) /* {{{ */
1977 {
1978 char *buffer_ptr = buffer;
1979 char *cmd_str = NULL;
1980 command_t *cmd = NULL;
1981 int status;
1983 assert (buffer[buffer_size - 1] == '\0');
1985 status = buffer_get_field (&buffer_ptr, &buffer_size, &cmd_str);
1986 if (status != 0)
1987 {
1988 RRDD_LOG (LOG_INFO, "handle_request: Unable parse command.");
1989 return (-1);
1990 }
1992 if (sock != NULL && sock->batch_start)
1993 sock->batch_cmd++;
1995 cmd = find_command(cmd_str);
1996 if (!cmd)
1997 return send_response(sock, RESP_ERR, "Unknown command: %s\n", cmd_str);
1999 if (!socket_permission_check (sock, cmd->cmd))
2000 return send_response(sock, RESP_ERR, "Permission denied.\n");
2002 if (!command_check_context(sock, cmd))
2003 return send_response(sock, RESP_ERR, "Can't use '%s' here.\n", cmd_str);
2005 return cmd->handler(cmd, sock, now, buffer_ptr, buffer_size);
2006 } /* }}} int handle_request */
2008 static void journal_set_free (journal_set *js) /* {{{ */
2009 {
2010 if (js == NULL)
2011 return;
2013 rrd_free_ptrs((void ***) &js->files, &js->files_num);
2015 free(js);
2016 } /* }}} journal_set_free */
2018 static void journal_set_remove (journal_set *js) /* {{{ */
2019 {
2020 if (js == NULL)
2021 return;
2023 for (uint i=0; i < js->files_num; i++)
2024 {
2025 RRDD_LOG(LOG_DEBUG, "removing old journal %s", js->files[i]);
2026 unlink(js->files[i]);
2027 }
2028 } /* }}} journal_set_remove */
2030 /* close current journal file handle.
2031 * MUST hold journal_lock before calling */
2032 static void journal_close(void) /* {{{ */
2033 {
2034 if (journal_fh != NULL)
2035 {
2036 if (fclose(journal_fh) != 0)
2037 RRDD_LOG(LOG_ERR, "cannot close journal: %s", rrd_strerror(errno));
2038 }
2040 journal_fh = NULL;
2041 journal_size = 0;
2042 } /* }}} journal_close */
2044 /* MUST hold journal_lock before calling */
2045 static void journal_new_file(void) /* {{{ */
2046 {
2047 struct timeval now;
2048 int new_fd;
2049 char new_file[PATH_MAX + 1];
2051 assert(journal_dir != NULL);
2052 assert(journal_cur != NULL);
2054 journal_close();
2056 gettimeofday(&now, NULL);
2057 /* this format assures that the files sort in strcmp() order */
2058 snprintf(new_file, PATH_MAX, "%s/%s.%010d.%06d",
2059 journal_dir, JOURNAL_BASE, (int)now.tv_sec, (int)now.tv_usec);
2061 new_fd = open(new_file, O_WRONLY|O_CREAT|O_APPEND,
2062 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
2063 if (new_fd < 0)
2064 goto error;
2066 journal_fh = fdopen(new_fd, "a");
2067 if (journal_fh == NULL)
2068 goto error;
2070 journal_size = ftell(journal_fh);
2071 RRDD_LOG(LOG_DEBUG, "started new journal %s", new_file);
2073 /* record the file in the journal set */
2074 rrd_add_strdup(&journal_cur->files, &journal_cur->files_num, new_file);
2076 return;
2078 error:
2079 RRDD_LOG(LOG_CRIT,
2080 "JOURNALING DISABLED: Error while trying to create %s : %s",
2081 new_file, rrd_strerror(errno));
2082 RRDD_LOG(LOG_CRIT,
2083 "JOURNALING DISABLED: All values will be flushed at shutdown");
2085 close(new_fd);
2086 config_flush_at_shutdown = 1;
2088 } /* }}} journal_new_file */
2090 /* MUST NOT hold journal_lock before calling this */
2091 static void journal_rotate(void) /* {{{ */
2092 {
2093 journal_set *old_js = NULL;
2095 if (journal_dir == NULL)
2096 return;
2098 RRDD_LOG(LOG_DEBUG, "rotating journals");
2100 pthread_mutex_lock(&stats_lock);
2101 ++stats_journal_rotate;
2102 pthread_mutex_unlock(&stats_lock);
2104 pthread_mutex_lock(&journal_lock);
2106 journal_close();
2108 /* rotate the journal sets */
2109 old_js = journal_old;
2110 journal_old = journal_cur;
2111 journal_cur = calloc(1, sizeof(journal_set));
2113 if (journal_cur != NULL)
2114 journal_new_file();
2115 else
2116 RRDD_LOG(LOG_CRIT, "journal_rotate: malloc(journal_set) failed\n");
2118 pthread_mutex_unlock(&journal_lock);
2120 journal_set_remove(old_js);
2121 journal_set_free (old_js);
2123 } /* }}} static void journal_rotate */
2125 /* MUST hold journal_lock when calling */
2126 static void journal_done(void) /* {{{ */
2127 {
2128 if (journal_cur == NULL)
2129 return;
2131 journal_close();
2133 if (config_flush_at_shutdown)
2134 {
2135 RRDD_LOG(LOG_INFO, "removing journals");
2136 journal_set_remove(journal_old);
2137 journal_set_remove(journal_cur);
2138 }
2139 else
2140 {
2141 RRDD_LOG(LOG_INFO, "expedited shutdown; "
2142 "journals will be used at next startup");
2143 }
2145 journal_set_free(journal_cur);
2146 journal_set_free(journal_old);
2147 free(journal_dir);
2149 } /* }}} static void journal_done */
2151 static int journal_write(char *cmd, char *args) /* {{{ */
2152 {
2153 int chars;
2155 if (journal_fh == NULL)
2156 return 0;
2158 pthread_mutex_lock(&journal_lock);
2159 chars = fprintf(journal_fh, "%s %s\n", cmd, args);
2160 journal_size += chars;
2162 if (journal_size > JOURNAL_MAX)
2163 journal_new_file();
2165 pthread_mutex_unlock(&journal_lock);
2167 if (chars > 0)
2168 {
2169 pthread_mutex_lock(&stats_lock);
2170 stats_journal_bytes += chars;
2171 pthread_mutex_unlock(&stats_lock);
2172 }
2174 return chars;
2175 } /* }}} static int journal_write */
2177 static int journal_replay (const char *file) /* {{{ */
2178 {
2179 FILE *fh;
2180 int entry_cnt = 0;
2181 int fail_cnt = 0;
2182 uint64_t line = 0;
2183 char entry[CMD_MAX];
2184 time_t now;
2186 if (file == NULL) return 0;
2188 {
2189 char *reason = "unknown error";
2190 int status = 0;
2191 struct stat statbuf;
2193 memset(&statbuf, 0, sizeof(statbuf));
2194 if (stat(file, &statbuf) != 0)
2195 {
2196 reason = "stat error";
2197 status = errno;
2198 }
2199 else if (!S_ISREG(statbuf.st_mode))
2200 {
2201 reason = "not a regular file";
2202 status = EPERM;
2203 }
2204 if (statbuf.st_uid != daemon_uid)
2205 {
2206 reason = "not owned by daemon user";
2207 status = EACCES;
2208 }
2209 if (statbuf.st_mode & (S_IWGRP|S_IWOTH))
2210 {
2211 reason = "must not be user/group writable";
2212 status = EACCES;
2213 }
2215 if (status != 0)
2216 {
2217 RRDD_LOG(LOG_ERR, "journal_replay: %s : %s (%s)",
2218 file, rrd_strerror(status), reason);
2219 return 0;
2220 }
2221 }
2223 fh = fopen(file, "r");
2224 if (fh == NULL)
2225 {
2226 if (errno != ENOENT)
2227 RRDD_LOG(LOG_ERR, "journal_replay: cannot open journal file: '%s' (%s)",
2228 file, rrd_strerror(errno));
2229 return 0;
2230 }
2231 else
2232 RRDD_LOG(LOG_NOTICE, "replaying from journal: %s", file);
2234 now = time(NULL);
2236 while(!feof(fh))
2237 {
2238 size_t entry_len;
2240 ++line;
2241 if (fgets(entry, sizeof(entry), fh) == NULL)
2242 break;
2243 entry_len = strlen(entry);
2245 /* check \n termination in case journal writing crashed mid-line */
2246 if (entry_len == 0)
2247 continue;
2248 else if (entry[entry_len - 1] != '\n')
2249 {
2250 RRDD_LOG(LOG_NOTICE, "Malformed journal entry at line %"PRIu64, line);
2251 ++fail_cnt;
2252 continue;
2253 }
2255 entry[entry_len - 1] = '\0';
2257 if (handle_request(NULL, now, entry, entry_len) == 0)
2258 ++entry_cnt;
2259 else
2260 ++fail_cnt;
2261 }
2263 fclose(fh);
2265 RRDD_LOG(LOG_INFO, "Replayed %d entries (%d failures)",
2266 entry_cnt, fail_cnt);
2268 return entry_cnt > 0 ? 1 : 0;
2269 } /* }}} static int journal_replay */
2271 static int journal_sort(const void *v1, const void *v2)
2272 {
2273 char **jn1 = (char **) v1;
2274 char **jn2 = (char **) v2;
2276 return strcmp(*jn1,*jn2);
2277 }
2279 static void journal_init(void) /* {{{ */
2280 {
2281 int had_journal = 0;
2282 DIR *dir;
2283 struct dirent *dent;
2284 char path[PATH_MAX+1];
2286 if (journal_dir == NULL) return;
2288 pthread_mutex_lock(&journal_lock);
2290 journal_cur = calloc(1, sizeof(journal_set));
2291 if (journal_cur == NULL)
2292 {
2293 RRDD_LOG(LOG_CRIT, "journal_rotate: malloc(journal_set) failed\n");
2294 return;
2295 }
2297 RRDD_LOG(LOG_INFO, "checking for journal files");
2299 /* Handle old journal files during transition. This gives them the
2300 * correct sort order. TODO: remove after first release
2301 */
2302 {
2303 char old_path[PATH_MAX+1];
2304 snprintf(old_path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".old" );
2305 snprintf(path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".0000");
2306 rename(old_path, path);
2308 snprintf(old_path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE );
2309 snprintf(path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".0001");
2310 rename(old_path, path);
2311 }
2313 dir = opendir(journal_dir);
2314 if (!dir) {
2315 RRDD_LOG(LOG_CRIT, "journal_init: opendir(%s) failed\n", journal_dir);
2316 return;
2317 }
2318 while ((dent = readdir(dir)) != NULL)
2319 {
2320 /* looks like a journal file? */
2321 if (strncmp(dent->d_name, JOURNAL_BASE, strlen(JOURNAL_BASE)))
2322 continue;
2324 snprintf(path, PATH_MAX, "%s/%s", journal_dir, dent->d_name);
2326 if (!rrd_add_strdup(&journal_cur->files, &journal_cur->files_num, path))
2327 {
2328 RRDD_LOG(LOG_CRIT, "journal_init: cannot add journal file %s!",
2329 dent->d_name);
2330 break;
2331 }
2332 }
2333 closedir(dir);
2335 qsort(journal_cur->files, journal_cur->files_num,
2336 sizeof(journal_cur->files[0]), journal_sort);
2338 for (uint i=0; i < journal_cur->files_num; i++)
2339 had_journal += journal_replay(journal_cur->files[i]);
2341 journal_new_file();
2343 /* it must have been a crash. start a flush */
2344 if (had_journal && config_flush_at_shutdown)
2345 flush_old_values(-1);
2347 pthread_mutex_unlock(&journal_lock);
2349 RRDD_LOG(LOG_INFO, "journal processing complete");
2351 } /* }}} static void journal_init */
2353 static void free_listen_socket(listen_socket_t *sock) /* {{{ */
2354 {
2355 assert(sock != NULL);
2357 free(sock->rbuf); sock->rbuf = NULL;
2358 free(sock->wbuf); sock->wbuf = NULL;
2359 free(sock);
2360 } /* }}} void free_listen_socket */
2362 static void close_connection(listen_socket_t *sock) /* {{{ */
2363 {
2364 if (sock->fd >= 0)
2365 {
2366 close(sock->fd);
2367 sock->fd = -1;
2368 }
2370 free_listen_socket(sock);
2372 } /* }}} void close_connection */
2374 static void *connection_thread_main (void *args) /* {{{ */
2375 {
2376 listen_socket_t *sock;
2377 int fd;
2379 sock = (listen_socket_t *) args;
2380 fd = sock->fd;
2382 /* init read buffers */
2383 sock->next_read = sock->next_cmd = 0;
2384 sock->rbuf = malloc(RBUF_SIZE);
2385 if (sock->rbuf == NULL)
2386 {
2387 RRDD_LOG(LOG_ERR, "connection_thread_main: cannot malloc read buffer");
2388 close_connection(sock);
2389 return NULL;
2390 }
2392 pthread_mutex_lock (&connection_threads_lock);
2393 connection_threads_num++;
2394 pthread_mutex_unlock (&connection_threads_lock);
2396 while (state == RUNNING)
2397 {
2398 char *cmd;
2399 ssize_t cmd_len;
2400 ssize_t rbytes;
2401 time_t now;
2403 struct pollfd pollfd;
2404 int status;
2406 pollfd.fd = fd;
2407 pollfd.events = POLLIN | POLLPRI;
2408 pollfd.revents = 0;
2410 status = poll (&pollfd, 1, /* timeout = */ 500);
2411 if (state != RUNNING)
2412 break;
2413 else if (status == 0) /* timeout */
2414 continue;
2415 else if (status < 0) /* error */
2416 {
2417 status = errno;
2418 if (status != EINTR)
2419 RRDD_LOG (LOG_ERR, "connection_thread_main: poll(2) failed.");
2420 continue;
2421 }
2423 if ((pollfd.revents & POLLHUP) != 0) /* normal shutdown */
2424 break;
2425 else if ((pollfd.revents & (POLLIN | POLLPRI)) == 0)
2426 {
2427 RRDD_LOG (LOG_WARNING, "connection_thread_main: "
2428 "poll(2) returned something unexpected: %#04hx",
2429 pollfd.revents);
2430 break;
2431 }
2433 rbytes = read(fd, sock->rbuf + sock->next_read,
2434 RBUF_SIZE - sock->next_read);
2435 if (rbytes < 0)
2436 {
2437 RRDD_LOG(LOG_ERR, "connection_thread_main: read() failed.");
2438 break;
2439 }
2440 else if (rbytes == 0)
2441 break; /* eof */
2443 sock->next_read += rbytes;
2445 if (sock->batch_start)
2446 now = sock->batch_start;
2447 else
2448 now = time(NULL);
2450 while ((cmd = next_cmd(sock, &cmd_len)) != NULL)
2451 {
2452 status = handle_request (sock, now, cmd, cmd_len+1);
2453 if (status != 0)
2454 goto out_close;
2455 }
2456 }
2458 out_close:
2459 close_connection(sock);
2461 /* Remove this thread from the connection threads list */
2462 pthread_mutex_lock (&connection_threads_lock);
2463 connection_threads_num--;
2464 if (connection_threads_num <= 0)
2465 pthread_cond_broadcast(&connection_threads_done);
2466 pthread_mutex_unlock (&connection_threads_lock);
2468 return (NULL);
2469 } /* }}} void *connection_thread_main */
2471 static int open_listen_socket_unix (const listen_socket_t *sock) /* {{{ */
2472 {
2473 int fd;
2474 struct sockaddr_un sa;
2475 listen_socket_t *temp;
2476 int status;
2477 const char *path;
2478 char *path_copy, *dir;
2480 path = sock->addr;
2481 if (strncmp(path, "unix:", strlen("unix:")) == 0)
2482 path += strlen("unix:");
2484 /* dirname may modify its argument */
2485 path_copy = strdup(path);
2486 if (path_copy == NULL)
2487 {
2488 fprintf(stderr, "rrdcached: strdup(): %s\n",
2489 rrd_strerror(errno));
2490 return (-1);
2491 }
2493 dir = dirname(path_copy);
2494 if (rrd_mkdir_p(dir, 0777) != 0)
2495 {
2496 fprintf(stderr, "Failed to create socket directory '%s': %s\n",
2497 dir, rrd_strerror(errno));
2498 return (-1);
2499 }
2501 free(path_copy);
2503 temp = (listen_socket_t *) rrd_realloc (listen_fds,
2504 sizeof (listen_fds[0]) * (listen_fds_num + 1));
2505 if (temp == NULL)
2506 {
2507 fprintf (stderr, "rrdcached: open_listen_socket_unix: realloc failed.\n");
2508 return (-1);
2509 }
2510 listen_fds = temp;
2511 memcpy (listen_fds + listen_fds_num, sock, sizeof (listen_fds[0]));
2513 fd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
2514 if (fd < 0)
2515 {
2516 fprintf (stderr, "rrdcached: unix socket(2) failed: %s\n",
2517 rrd_strerror(errno));
2518 return (-1);
2519 }
2521 memset (&sa, 0, sizeof (sa));
2522 sa.sun_family = AF_UNIX;
2523 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
2525 /* if we've gotten this far, we own the pid file. any daemon started
2526 * with the same args must not be alive. therefore, ensure that we can
2527 * create the socket...
2528 */
2529 unlink(path);
2531 status = bind (fd, (struct sockaddr *) &sa, sizeof (sa));
2532 if (status != 0)
2533 {
2534 fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
2535 path, rrd_strerror(errno));
2536 close (fd);
2537 return (-1);
2538 }
2540 /* tweak the sockets group ownership */
2541 if (sock->socket_group != (gid_t)-1)
2542 {
2543 if ( (chown(path, getuid(), sock->socket_group) != 0) ||
2544 (chmod(path, (S_IRUSR|S_IWUSR|S_IXUSR | S_IRGRP|S_IWGRP)) != 0) )
2545 {
2546 fprintf(stderr, "rrdcached: failed to set socket group permissions (%s)\n", strerror(errno));
2547 }
2548 }
2550 if (sock->socket_permissions != (mode_t)-1)
2551 {
2552 if (chmod(path, sock->socket_permissions) != 0)
2553 fprintf(stderr, "rrdcached: failed to set socket file permissions (%o): %s\n",
2554 (unsigned int)sock->socket_permissions, strerror(errno));
2555 }
2557 status = listen (fd, /* backlog = */ 10);
2558 if (status != 0)
2559 {
2560 fprintf (stderr, "rrdcached: listen(%s) failed: %s.\n",
2561 path, rrd_strerror(errno));
2562 close (fd);
2563 unlink (path);
2564 return (-1);
2565 }
2567 listen_fds[listen_fds_num].fd = fd;
2568 listen_fds[listen_fds_num].family = PF_UNIX;
2569 strncpy(listen_fds[listen_fds_num].addr, path,
2570 sizeof (listen_fds[listen_fds_num].addr) - 1);
2571 listen_fds_num++;
2573 return (0);
2574 } /* }}} int open_listen_socket_unix */
2576 static int open_listen_socket_network(const listen_socket_t *sock) /* {{{ */
2577 {
2578 struct addrinfo ai_hints;
2579 struct addrinfo *ai_res;
2580 struct addrinfo *ai_ptr;
2581 char addr_copy[NI_MAXHOST];
2582 char *addr;
2583 char *port;
2584 int status;
2586 strncpy (addr_copy, sock->addr, sizeof(addr_copy)-1);
2587 addr_copy[sizeof (addr_copy) - 1] = 0;
2588 addr = addr_copy;
2590 memset (&ai_hints, 0, sizeof (ai_hints));
2591 ai_hints.ai_flags = 0;
2592 #ifdef AI_ADDRCONFIG
2593 ai_hints.ai_flags |= AI_ADDRCONFIG;
2594 #endif
2595 ai_hints.ai_family = AF_UNSPEC;
2596 ai_hints.ai_socktype = SOCK_STREAM;
2598 port = NULL;
2599 if (*addr == '[') /* IPv6+port format */
2600 {
2601 /* `addr' is something like "[2001:780:104:2:211:24ff:feab:26f8]:12345" */
2602 addr++;
2604 port = strchr (addr, ']');
2605 if (port == NULL)
2606 {
2607 fprintf (stderr, "rrdcached: Malformed address: %s\n", sock->addr);
2608 return (-1);
2609 }
2610 *port = 0;
2611 port++;
2613 if (*port == ':')
2614 port++;
2615 else if (*port == 0)
2616 port = NULL;
2617 else
2618 {
2619 fprintf (stderr, "rrdcached: Garbage after address: %s\n", port);
2620 return (-1);
2621 }
2622 } /* if (*addr == '[') */
2623 else
2624 {
2625 port = rindex(addr, ':');
2626 if (port != NULL)
2627 {
2628 *port = 0;
2629 port++;
2630 }
2631 }
2632 ai_res = NULL;
2633 status = getaddrinfo (addr,
2634 port == NULL ? RRDCACHED_DEFAULT_PORT : port,
2635 &ai_hints, &ai_res);
2636 if (status != 0)
2637 {
2638 fprintf (stderr, "rrdcached: getaddrinfo(%s) failed: %s\n",
2639 addr, gai_strerror (status));
2640 return (-1);
2641 }
2643 for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2644 {
2645 int fd;
2646 listen_socket_t *temp;
2647 int one = 1;
2649 temp = (listen_socket_t *) rrd_realloc (listen_fds,
2650 sizeof (listen_fds[0]) * (listen_fds_num + 1));
2651 if (temp == NULL)
2652 {
2653 fprintf (stderr,
2654 "rrdcached: open_listen_socket_network: realloc failed.\n");
2655 continue;
2656 }
2657 listen_fds = temp;
2658 memcpy (listen_fds + listen_fds_num, sock, sizeof (listen_fds[0]));
2660 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
2661 if (fd < 0)
2662 {
2663 fprintf (stderr, "rrdcached: network socket(2) failed: %s.\n",
2664 rrd_strerror(errno));
2665 continue;
2666 }
2668 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
2670 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2671 if (status != 0)
2672 {
2673 fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
2674 sock->addr, rrd_strerror(errno));
2675 close (fd);
2676 continue;
2677 }
2679 status = listen (fd, /* backlog = */ 10);
2680 if (status != 0)
2681 {
2682 fprintf (stderr, "rrdcached: listen(%s) failed: %s\n.",
2683 sock->addr, rrd_strerror(errno));
2684 close (fd);
2685 freeaddrinfo(ai_res);
2686 return (-1);
2687 }
2689 listen_fds[listen_fds_num].fd = fd;
2690 listen_fds[listen_fds_num].family = ai_ptr->ai_family;
2691 listen_fds_num++;
2692 } /* for (ai_ptr) */
2694 freeaddrinfo(ai_res);
2695 return (0);
2696 } /* }}} static int open_listen_socket_network */
2698 static int open_listen_socket (const listen_socket_t *sock) /* {{{ */
2699 {
2700 assert(sock != NULL);
2701 assert(sock->addr != NULL);
2703 if (strncmp ("unix:", sock->addr, strlen ("unix:")) == 0
2704 || sock->addr[0] == '/')
2705 return (open_listen_socket_unix(sock));
2706 else
2707 return (open_listen_socket_network(sock));
2708 } /* }}} int open_listen_socket */
2710 static int close_listen_sockets (void) /* {{{ */
2711 {
2712 size_t i;
2714 for (i = 0; i < listen_fds_num; i++)
2715 {
2716 close (listen_fds[i].fd);
2718 if (listen_fds[i].family == PF_UNIX)
2719 unlink(listen_fds[i].addr);
2720 }
2722 free (listen_fds);
2723 listen_fds = NULL;
2724 listen_fds_num = 0;
2726 return (0);
2727 } /* }}} int close_listen_sockets */
2729 static void *listen_thread_main (void UNUSED(*args)) /* {{{ */
2730 {
2731 struct pollfd *pollfds;
2732 int pollfds_num;
2733 int status;
2734 int i;
2736 if (listen_fds_num < 1)
2737 {
2738 RRDD_LOG(LOG_ERR, "listen_thread_main: no listen_fds !");
2739 return (NULL);
2740 }
2742 pollfds_num = listen_fds_num;
2743 pollfds = (struct pollfd *) malloc (sizeof (*pollfds) * pollfds_num);
2744 if (pollfds == NULL)
2745 {
2746 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
2747 return (NULL);
2748 }
2749 memset (pollfds, 0, sizeof (*pollfds) * pollfds_num);
2751 RRDD_LOG(LOG_INFO, "listening for connections");
2753 while (state == RUNNING)
2754 {
2755 for (i = 0; i < pollfds_num; i++)
2756 {
2757 pollfds[i].fd = listen_fds[i].fd;
2758 pollfds[i].events = POLLIN | POLLPRI;
2759 pollfds[i].revents = 0;
2760 }
2762 status = poll (pollfds, pollfds_num, /* timeout = */ 1000);
2763 if (state != RUNNING)
2764 break;
2765 else if (status == 0) /* timeout */
2766 continue;
2767 else if (status < 0) /* error */
2768 {
2769 status = errno;
2770 if (status != EINTR)
2771 {
2772 RRDD_LOG (LOG_ERR, "listen_thread_main: poll(2) failed.");
2773 }
2774 continue;
2775 }
2777 for (i = 0; i < pollfds_num; i++)
2778 {
2779 listen_socket_t *client_sock;
2780 struct sockaddr_storage client_sa;
2781 socklen_t client_sa_size;
2782 pthread_t tid;
2783 pthread_attr_t attr;
2785 if (pollfds[i].revents == 0)
2786 continue;
2788 if ((pollfds[i].revents & (POLLIN | POLLPRI)) == 0)
2789 {
2790 RRDD_LOG (LOG_ERR, "listen_thread_main: "
2791 "poll(2) returned something unexpected for listen FD #%i.",
2792 pollfds[i].fd);
2793 continue;
2794 }
2796 client_sock = (listen_socket_t *) malloc (sizeof (listen_socket_t));
2797 if (client_sock == NULL)
2798 {
2799 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
2800 continue;
2801 }
2802 memcpy(client_sock, &listen_fds[i], sizeof(listen_fds[0]));
2804 client_sa_size = sizeof (client_sa);
2805 client_sock->fd = accept (pollfds[i].fd,
2806 (struct sockaddr *) &client_sa, &client_sa_size);
2807 if (client_sock->fd < 0)
2808 {
2809 RRDD_LOG (LOG_ERR, "listen_thread_main: accept(2) failed.");
2810 free(client_sock);
2811 continue;
2812 }
2814 pthread_attr_init (&attr);
2815 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
2817 status = pthread_create (&tid, &attr, connection_thread_main,
2818 client_sock);
2819 if (status != 0)
2820 {
2821 RRDD_LOG (LOG_ERR, "listen_thread_main: pthread_create failed.");
2822 close_connection(client_sock);
2823 continue;
2824 }
2825 } /* for (pollfds_num) */
2826 } /* while (state == RUNNING) */
2828 RRDD_LOG(LOG_INFO, "starting shutdown");
2830 close_listen_sockets ();
2832 pthread_mutex_lock (&connection_threads_lock);
2833 while (connection_threads_num > 0)
2834 pthread_cond_wait(&connection_threads_done, &connection_threads_lock);
2835 pthread_mutex_unlock (&connection_threads_lock);
2837 free(pollfds);
2839 return (NULL);
2840 } /* }}} void *listen_thread_main */
2842 static int daemonize (void) /* {{{ */
2843 {
2844 int pid_fd;
2845 char *base_dir;
2847 daemon_uid = geteuid();
2849 pid_fd = open_pidfile("create", O_CREAT|O_EXCL|O_WRONLY);
2850 if (pid_fd < 0)
2851 pid_fd = check_pidfile();
2852 if (pid_fd < 0)
2853 return pid_fd;
2855 /* open all the listen sockets */
2856 if (config_listen_address_list_len > 0)
2857 {
2858 for (size_t i = 0; i < config_listen_address_list_len; i++)
2859 open_listen_socket (config_listen_address_list[i]);
2861 rrd_free_ptrs((void ***) &config_listen_address_list,
2862 &config_listen_address_list_len);
2863 }
2864 else
2865 {
2866 listen_socket_t sock;
2867 memset(&sock, 0, sizeof(sock));
2868 strncpy(sock.addr, RRDCACHED_DEFAULT_ADDRESS, sizeof(sock.addr)-1);
2869 open_listen_socket (&sock);
2870 }
2872 if (listen_fds_num < 1)
2873 {
2874 fprintf (stderr, "rrdcached: FATAL: cannot open any listen sockets\n");
2875 goto error;
2876 }
2878 if (!stay_foreground)
2879 {
2880 pid_t child;
2882 child = fork ();
2883 if (child < 0)
2884 {
2885 fprintf (stderr, "daemonize: fork(2) failed.\n");
2886 goto error;
2887 }
2888 else if (child > 0)
2889 exit(0);
2891 /* Become session leader */
2892 setsid ();
2894 /* Open the first three file descriptors to /dev/null */
2895 close (2);
2896 close (1);
2897 close (0);
2899 open ("/dev/null", O_RDWR);
2900 if (dup(0) == -1 || dup(0) == -1){
2901 RRDD_LOG (LOG_ERR, "faild to run dup.\n");
2902 }
2903 } /* if (!stay_foreground) */
2905 /* Change into the /tmp directory. */
2906 base_dir = (config_base_dir != NULL)
2907 ? config_base_dir
2908 : "/tmp";
2910 if (chdir (base_dir) != 0)
2911 {
2912 fprintf (stderr, "daemonize: chdir (%s) failed.\n", base_dir);
2913 goto error;
2914 }
2916 install_signal_handlers();
2918 openlog ("rrdcached", LOG_PID, LOG_DAEMON);
2919 RRDD_LOG(LOG_INFO, "starting up");
2921 cache_tree = g_tree_new_full ((GCompareDataFunc) strcmp, NULL, NULL,
2922 (GDestroyNotify) free_cache_item);
2923 if (cache_tree == NULL)
2924 {
2925 RRDD_LOG (LOG_ERR, "daemonize: g_tree_new failed.");
2926 goto error;
2927 }
2929 return write_pidfile (pid_fd);
2931 error:
2932 remove_pidfile();
2933 return -1;
2934 } /* }}} int daemonize */
2936 static int cleanup (void) /* {{{ */
2937 {
2938 pthread_cond_broadcast (&flush_cond);
2939 pthread_join (flush_thread, NULL);
2941 pthread_cond_broadcast (&queue_cond);
2942 for (int i = 0; i < config_queue_threads; i++)
2943 pthread_join (queue_threads[i], NULL);
2945 if (config_flush_at_shutdown)
2946 {
2947 assert(cache_queue_head == NULL);
2948 RRDD_LOG(LOG_INFO, "clean shutdown; all RRDs flushed");
2949 }
2951 free(queue_threads);
2952 free(config_base_dir);
2954 pthread_mutex_lock(&cache_lock);
2955 g_tree_destroy(cache_tree);
2957 pthread_mutex_lock(&journal_lock);
2958 journal_done();
2960 RRDD_LOG(LOG_INFO, "goodbye");
2961 closelog ();
2963 remove_pidfile ();
2964 free(config_pid_file);
2966 return (0);
2967 } /* }}} int cleanup */
2969 static int read_options (int argc, char **argv) /* {{{ */
2970 {
2971 int option;
2972 int status = 0;
2974 char **permissions = NULL;
2975 size_t permissions_len = 0;
2977 gid_t socket_group = (gid_t)-1;
2978 mode_t socket_permissions = (mode_t)-1;
2980 while ((option = getopt(argc, argv, "gl:s:m:P:f:w:z:t:Bb:p:Fj:a:h?")) != -1)
2981 {
2982 switch (option)
2983 {
2984 case 'g':
2985 stay_foreground=1;
2986 break;
2988 case 'l':
2989 {
2990 listen_socket_t *new;
2992 new = malloc(sizeof(listen_socket_t));
2993 if (new == NULL)
2994 {
2995 fprintf(stderr, "read_options: malloc failed.\n");
2996 return(2);
2997 }
2998 memset(new, 0, sizeof(listen_socket_t));
3000 strncpy(new->addr, optarg, sizeof(new->addr)-1);
3002 /* Add permissions to the socket {{{ */
3003 if (permissions_len != 0)
3004 {
3005 size_t i;
3006 for (i = 0; i < permissions_len; i++)
3007 {
3008 status = socket_permission_add (new, permissions[i]);
3009 if (status != 0)
3010 {
3011 fprintf (stderr, "read_options: Adding permission \"%s\" to "
3012 "socket failed. Most likely, this permission doesn't "
3013 "exist. Check your command line.\n", permissions[i]);
3014 status = 4;
3015 }
3016 }
3017 }
3018 else /* if (permissions_len == 0) */
3019 {
3020 /* Add permission for ALL commands to the socket. */
3021 size_t i;
3022 for (i = 0; i < list_of_commands_len; i++)
3023 {
3024 status = socket_permission_add (new, list_of_commands[i].cmd);
3025 if (status != 0)
3026 {
3027 fprintf (stderr, "read_options: Adding permission \"%s\" to "
3028 "socket failed. This should never happen, ever! Sorry.\n",
3029 permissions[i]);
3030 status = 4;
3031 }
3032 }
3033 }
3034 /* }}} Done adding permissions. */
3036 new->socket_group = socket_group;
3037 new->socket_permissions = socket_permissions;
3039 if (!rrd_add_ptr((void ***)&config_listen_address_list,
3040 &config_listen_address_list_len, new))
3041 {
3042 fprintf(stderr, "read_options: rrd_add_ptr failed.\n");
3043 return (2);
3044 }
3045 }
3046 break;
3048 /* set socket group permissions */
3049 case 's':
3050 {
3051 gid_t group_gid;
3052 struct group *grp;
3054 group_gid = strtoul(optarg, NULL, 10);
3055 if (errno != EINVAL && group_gid>0)
3056 {
3057 /* we were passed a number */
3058 grp = getgrgid(group_gid);
3059 }
3060 else
3061 {
3062 grp = getgrnam(optarg);
3063 }
3065 if (grp)
3066 {
3067 socket_group = grp->gr_gid;
3068 }
3069 else
3070 {
3071 /* no idea what the user wanted... */
3072 fprintf (stderr, "read_options: couldn't map \"%s\" to a group, Sorry\n", optarg);
3073 return (5);
3074 }
3075 }
3076 break;
3078 /* set socket file permissions */
3079 case 'm':
3080 {
3081 long tmp;
3082 char *endptr = NULL;
3084 tmp = strtol (optarg, &endptr, 8);
3085 if ((endptr == optarg) || (! endptr) || (*endptr != '\0')
3086 || (tmp > 07777) || (tmp < 0)) {
3087 fprintf (stderr, "read_options: Invalid file mode \"%s\".\n",
3088 optarg);
3089 return (5);
3090 }
3092 socket_permissions = (mode_t)tmp;
3093 }
3094 break;
3096 case 'P':
3097 {
3098 char *optcopy;
3099 char *saveptr;
3100 char *dummy;
3101 char *ptr;
3103 rrd_free_ptrs ((void *) &permissions, &permissions_len);
3105 optcopy = strdup (optarg);
3106 dummy = optcopy;
3107 saveptr = NULL;
3108 while ((ptr = strtok_r (dummy, ", ", &saveptr)) != NULL)
3109 {
3110 dummy = NULL;
3111 rrd_add_strdup ((void *) &permissions, &permissions_len, ptr);
3112 }
3114 free (optcopy);
3115 }
3116 break;
3118 case 'f':
3119 {
3120 int temp;
3122 temp = atoi (optarg);
3123 if (temp > 0)
3124 config_flush_interval = temp;
3125 else
3126 {
3127 fprintf (stderr, "Invalid flush interval: %s\n", optarg);
3128 status = 3;
3129 }
3130 }
3131 break;
3133 case 'w':
3134 {
3135 int temp;
3137 temp = atoi (optarg);
3138 if (temp > 0)
3139 config_write_interval = temp;
3140 else
3141 {
3142 fprintf (stderr, "Invalid write interval: %s\n", optarg);
3143 status = 2;
3144 }
3145 }
3146 break;
3148 case 'z':
3149 {
3150 int temp;
3152 temp = atoi(optarg);
3153 if (temp > 0)
3154 config_write_jitter = temp;
3155 else
3156 {
3157 fprintf (stderr, "Invalid write jitter: -z %s\n", optarg);
3158 status = 2;
3159 }
3161 break;
3162 }
3164 case 't':
3165 {
3166 int threads;
3167 threads = atoi(optarg);
3168 if (threads >= 1)
3169 config_queue_threads = threads;
3170 else
3171 {
3172 fprintf (stderr, "Invalid thread count: -t %s\n", optarg);
3173 return 1;
3174 }
3175 }
3176 break;
3178 case 'B':
3179 config_write_base_only = 1;
3180 break;
3182 case 'b':
3183 {
3184 size_t len;
3185 char base_realpath[PATH_MAX];
3187 if (config_base_dir != NULL)
3188 free (config_base_dir);
3189 config_base_dir = strdup (optarg);
3190 if (config_base_dir == NULL)
3191 {
3192 fprintf (stderr, "read_options: strdup failed.\n");
3193 return (3);
3194 }
3196 if (rrd_mkdir_p (config_base_dir, 0777) != 0)
3197 {
3198 fprintf (stderr, "Failed to create base directory '%s': %s\n",
3199 config_base_dir, rrd_strerror (errno));
3200 return (3);
3201 }
3203 /* make sure that the base directory is not resolved via
3204 * symbolic links. this makes some performance-enhancing
3205 * assumptions possible (we don't have to resolve paths
3206 * that start with a "/")
3207 */
3208 if (realpath(config_base_dir, base_realpath) == NULL)
3209 {
3210 fprintf (stderr, "Failed to canonicalize the base directory '%s': "
3211 "%s\n", config_base_dir, rrd_strerror(errno));
3212 return 5;
3213 }
3215 len = strlen (config_base_dir);
3216 while ((len > 0) && (config_base_dir[len - 1] == '/'))
3217 {
3218 config_base_dir[len - 1] = 0;
3219 len--;
3220 }
3222 if (len < 1)
3223 {
3224 fprintf (stderr, "Invalid base directory: %s\n", optarg);
3225 return (4);
3226 }
3228 _config_base_dir_len = len;
3230 len = strlen (base_realpath);
3231 while ((len > 0) && (base_realpath[len - 1] == '/'))
3232 {
3233 base_realpath[len - 1] = '\0';
3234 len--;
3235 }
3237 if (strncmp(config_base_dir,
3238 base_realpath, sizeof(base_realpath)) != 0)
3239 {
3240 fprintf(stderr,
3241 "Base directory (-b) resolved via file system links!\n"
3242 "Please consult rrdcached '-b' documentation!\n"
3243 "Consider specifying the real directory (%s)\n",
3244 base_realpath);
3245 return 5;
3246 }
3247 }
3248 break;
3250 case 'p':
3251 {
3252 if (config_pid_file != NULL)
3253 free (config_pid_file);
3254 config_pid_file = strdup (optarg);
3255 if (config_pid_file == NULL)
3256 {
3257 fprintf (stderr, "read_options: strdup failed.\n");
3258 return (3);
3259 }
3260 }
3261 break;
3263 case 'F':
3264 config_flush_at_shutdown = 1;
3265 break;
3267 case 'j':
3268 {
3269 char journal_dir_actual[PATH_MAX];
3270 const char *dir;
3271 dir = journal_dir = strdup(realpath((const char *)optarg, journal_dir_actual));
3273 status = rrd_mkdir_p(dir, 0777);
3274 if (status != 0)
3275 {
3276 fprintf(stderr, "Failed to create journal directory '%s': %s\n",
3277 dir, rrd_strerror(errno));
3278 return 6;
3279 }
3281 if (access(dir, R_OK|W_OK|X_OK) != 0)
3282 {
3283 fprintf(stderr, "Must specify a writable directory with -j! (%s)\n",
3284 errno ? rrd_strerror(errno) : "");
3285 return 6;
3286 }
3287 }
3288 break;
3290 case 'a':
3291 {
3292 int temp = atoi(optarg);
3293 if (temp > 0)
3294 config_alloc_chunk = temp;
3295 else
3296 {
3297 fprintf(stderr, "Invalid allocation size: %s\n", optarg);
3298 return 10;
3299 }
3300 }
3301 break;
3303 case 'h':
3304 case '?':
3305 printf ("RRDCacheD %s\n"
3306 "Copyright (C) 2008,2009 Florian octo Forster and Kevin Brintnall\n"
3307 "\n"
3308 "Usage: rrdcached [options]\n"
3309 "\n"
3310 "Valid options are:\n"
3311 " -l <address> Socket address to listen to.\n"
3312 " -P <perms> Sets the permissions to assign to all following "
3313 "sockets\n"
3314 " -w <seconds> Interval in which to write data.\n"
3315 " -z <delay> Delay writes up to <delay> seconds to spread load\n"
3316 " -t <threads> Number of write threads.\n"
3317 " -f <seconds> Interval in which to flush dead data.\n"
3318 " -p <file> Location of the PID-file.\n"
3319 " -b <dir> Base directory to change to.\n"
3320 " -B Restrict file access to paths within -b <dir>\n"
3321 " -g Do not fork and run in the foreground.\n"
3322 " -j <dir> Directory in which to create the journal files.\n"
3323 " -F Always flush all updates at shutdown\n"
3324 " -s <id|name> Group owner of all following UNIX sockets\n"
3325 " (the socket will also have read/write permissions "
3326 "for that group)\n"
3327 " -m <mode> File permissions (octal) of all following UNIX "
3328 "sockets\n"
3329 " -a <size> Memory allocation chunk size. Default is 1."
3330 "\n"
3331 "For more information and a detailed description of all options "
3332 "please refer\n"
3333 "to the rrdcached(1) manual page.\n",
3334 VERSION);
3335 if (option == 'h')
3336 status = -1;
3337 else
3338 status = 1;
3339 break;
3340 } /* switch (option) */
3341 } /* while (getopt) */
3343 /* advise the user when values are not sane */
3344 if (config_flush_interval < 2 * config_write_interval)
3345 fprintf(stderr, "WARNING: flush interval (-f) should be at least"
3346 " 2x write interval (-w) !\n");
3347 if (config_write_jitter > config_write_interval)
3348 fprintf(stderr, "WARNING: write delay (-z) should NOT be larger than"
3349 " write interval (-w) !\n");
3351 if (config_write_base_only && config_base_dir == NULL)
3352 fprintf(stderr, "WARNING: -B does not make sense without -b!\n"
3353 " Consult the rrdcached documentation\n");
3355 if (journal_dir == NULL)
3356 config_flush_at_shutdown = 1;
3358 rrd_free_ptrs ((void *) &permissions, &permissions_len);
3360 return (status);
3361 } /* }}} int read_options */
3363 int main (int argc, char **argv)
3364 {
3365 int status;
3367 status = read_options (argc, argv);
3368 if (status != 0)
3369 {
3370 if (status < 0)
3371 status = 0;
3372 return (status);
3373 }
3375 status = daemonize ();
3376 if (status != 0)
3377 {
3378 fprintf (stderr, "rrdcached: daemonize failed, exiting.\n");
3379 return (1);
3380 }
3382 journal_init();
3384 /* start the queue threads */
3385 queue_threads = calloc(config_queue_threads, sizeof(*queue_threads));
3386 if (queue_threads == NULL)
3387 {
3388 RRDD_LOG (LOG_ERR, "FATAL: cannot calloc queue threads");
3389 cleanup();
3390 return (1);
3391 }
3392 for (int i = 0; i < config_queue_threads; i++)
3393 {
3394 memset (&queue_threads[i], 0, sizeof (*queue_threads));
3395 status = pthread_create (&queue_threads[i], NULL, queue_thread_main, NULL);
3396 if (status != 0)
3397 {
3398 RRDD_LOG (LOG_ERR, "FATAL: cannot create queue thread");
3399 cleanup();
3400 return (1);
3401 }
3402 }
3404 /* start the flush thread */
3405 memset(&flush_thread, 0, sizeof(flush_thread));
3406 status = pthread_create (&flush_thread, NULL, flush_thread_main, NULL);
3407 if (status != 0)
3408 {
3409 RRDD_LOG (LOG_ERR, "FATAL: cannot create flush thread");
3410 cleanup();
3411 return (1);
3412 }
3414 listen_thread_main (NULL);
3415 cleanup ();
3417 return (0);
3418 } /* int main */
3420 /*
3421 * vim: set sw=2 sts=2 ts=8 et fdm=marker :
3422 */