25675a1c9725ac3f61c1227d43a343e7c878da46
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 start 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 }
1632 add_response_info (sock, "DSName: %s\n", linebuf);
1633 }
1635 /* Add the actual data */
1636 assert (step > 0);
1637 data_ptr = data;
1638 for (t = start_tm + step; t <= end_tm; t += step)
1639 {
1640 char linebuf[1024];
1641 size_t linebuf_fill;
1642 char tmp[128];
1644 memset (linebuf, 0, sizeof (linebuf));
1645 linebuf_fill = 0;
1646 for (i = 0; i < ds_cnt; i++)
1647 {
1648 snprintf (tmp, sizeof (tmp), " %0.10e", *data_ptr);
1649 tmp[sizeof (tmp) - 1] = 0;
1650 SSTRCAT (linebuf, tmp, linebuf_fill);
1652 data_ptr++;
1653 }
1655 add_response_info (sock, "%10lu:%s\n", (unsigned long) t, linebuf);
1656 } /* for (t) */
1658 return (send_response (sock, RESP_OK, "Success\n"));
1659 #undef SSTRCAT
1660 } /* }}} int handle_request_fetch */
1662 /* we came across a "WROTE" entry during journal replay.
1663 * throw away any values that we have accumulated for this file
1664 */
1665 static int handle_request_wrote (HANDLER_PROTO) /* {{{ */
1666 {
1667 cache_item_t *ci;
1668 const char *file = buffer;
1670 pthread_mutex_lock(&cache_lock);
1672 ci = g_tree_lookup(cache_tree, file);
1673 if (ci == NULL)
1674 {
1675 pthread_mutex_unlock(&cache_lock);
1676 return (0);
1677 }
1679 if (ci->values)
1680 rrd_free_ptrs((void ***) &ci->values, &ci->values_num);
1682 wipe_ci_values(ci, now);
1683 remove_from_queue(ci);
1685 pthread_mutex_unlock(&cache_lock);
1686 return (0);
1687 } /* }}} int handle_request_wrote */
1689 /* start "BATCH" processing */
1690 static int batch_start (HANDLER_PROTO) /* {{{ */
1691 {
1692 int status;
1693 if (sock->batch_start)
1694 return send_response(sock, RESP_ERR, "Already in BATCH\n");
1696 status = send_response(sock, RESP_OK,
1697 "Go ahead. End with dot '.' on its own line.\n");
1698 sock->batch_start = time(NULL);
1699 sock->batch_cmd = 0;
1701 return status;
1702 } /* }}} static int batch_start */
1704 /* finish "BATCH" processing and return results to the client */
1705 static int batch_done (HANDLER_PROTO) /* {{{ */
1706 {
1707 assert(sock->batch_start);
1708 sock->batch_start = 0;
1709 sock->batch_cmd = 0;
1710 return send_response(sock, RESP_OK, "errors\n");
1711 } /* }}} static int batch_done */
1713 static int handle_request_quit (HANDLER_PROTO) /* {{{ */
1714 {
1715 return -1;
1716 } /* }}} static int handle_request_quit */
1718 static command_t list_of_commands[] = { /* {{{ */
1719 {
1720 "UPDATE",
1721 handle_request_update,
1722 CMD_CONTEXT_ANY,
1723 "UPDATE <filename> <values> [<values> ...]\n"
1724 ,
1725 "Adds the given file to the internal cache if it is not yet known and\n"
1726 "appends the given value(s) to the entry. See the rrdcached(1) manpage\n"
1727 "for details.\n"
1728 "\n"
1729 "Each <values> has the following form:\n"
1730 " <values> = <time>:<value>[:<value>[...]]\n"
1731 "See the rrdupdate(1) manpage for details.\n"
1732 },
1733 {
1734 "WROTE",
1735 handle_request_wrote,
1736 CMD_CONTEXT_JOURNAL,
1737 NULL,
1738 NULL
1739 },
1740 {
1741 "FLUSH",
1742 handle_request_flush,
1743 CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
1744 "FLUSH <filename>\n"
1745 ,
1746 "Adds the given filename to the head of the update queue and returns\n"
1747 "after it has been dequeued.\n"
1748 },
1749 {
1750 "FLUSHALL",
1751 handle_request_flushall,
1752 CMD_CONTEXT_CLIENT,
1753 "FLUSHALL\n"
1754 ,
1755 "Triggers writing of all pending updates. Returns immediately.\n"
1756 },
1757 {
1758 "PENDING",
1759 handle_request_pending,
1760 CMD_CONTEXT_CLIENT,
1761 "PENDING <filename>\n"
1762 ,
1763 "Shows any 'pending' updates for a file, in order.\n"
1764 "The updates shown have not yet been written to the underlying RRD file.\n"
1765 },
1766 {
1767 "FORGET",
1768 handle_request_forget,
1769 CMD_CONTEXT_ANY,
1770 "FORGET <filename>\n"
1771 ,
1772 "Removes the file completely from the cache.\n"
1773 "Any pending updates for the file will be lost.\n"
1774 },
1775 {
1776 "QUEUE",
1777 handle_request_queue,
1778 CMD_CONTEXT_CLIENT,
1779 "QUEUE\n"
1780 ,
1781 "Shows all files in the output queue.\n"
1782 "The output is zero or more lines in the following format:\n"
1783 "(where <num_vals> is the number of values to be written)\n"
1784 "\n"
1785 "<num_vals> <filename>\n"
1786 },
1787 {
1788 "STATS",
1789 handle_request_stats,
1790 CMD_CONTEXT_CLIENT,
1791 "STATS\n"
1792 ,
1793 "Returns some performance counters, see the rrdcached(1) manpage for\n"
1794 "a description of the values.\n"
1795 },
1796 {
1797 "HELP",
1798 handle_request_help,
1799 CMD_CONTEXT_CLIENT,
1800 "HELP [<command>]\n",
1801 NULL, /* special! */
1802 },
1803 {
1804 "BATCH",
1805 batch_start,
1806 CMD_CONTEXT_CLIENT,
1807 "BATCH\n"
1808 ,
1809 "The 'BATCH' command permits the client to initiate a bulk load\n"
1810 " of commands to rrdcached.\n"
1811 "\n"
1812 "Usage:\n"
1813 "\n"
1814 " client: BATCH\n"
1815 " server: 0 Go ahead. End with dot '.' on its own line.\n"
1816 " client: command #1\n"
1817 " client: command #2\n"
1818 " client: ... and so on\n"
1819 " client: .\n"
1820 " server: 2 errors\n"
1821 " server: 7 message for command #7\n"
1822 " server: 9 message for command #9\n"
1823 "\n"
1824 "For more information, consult the rrdcached(1) documentation.\n"
1825 },
1826 {
1827 ".", /* BATCH terminator */
1828 batch_done,
1829 CMD_CONTEXT_BATCH,
1830 NULL,
1831 NULL
1832 },
1833 {
1834 "FETCH",
1835 handle_request_fetch,
1836 CMD_CONTEXT_CLIENT,
1837 "FETCH <file> <CF> [<start> [<end>]]\n"
1838 ,
1839 "The 'FETCH' can be used by the client to retrieve values from an RRD file.\n"
1840 },
1841 {
1842 "QUIT",
1843 handle_request_quit,
1844 CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
1845 "QUIT\n"
1846 ,
1847 "Disconnect from rrdcached.\n"
1848 }
1849 }; /* }}} command_t list_of_commands[] */
1850 static size_t list_of_commands_len = sizeof (list_of_commands)
1851 / sizeof (list_of_commands[0]);
1853 static command_t *find_command(char *cmd)
1854 {
1855 size_t i;
1857 for (i = 0; i < list_of_commands_len; i++)
1858 if (strcasecmp(cmd, list_of_commands[i].cmd) == 0)
1859 return (&list_of_commands[i]);
1860 return NULL;
1861 }
1863 /* We currently use the index in the `list_of_commands' array as a bit position
1864 * in `listen_socket_t.permissions'. This member schould NEVER be accessed from
1865 * outside these functions so that switching to a more elegant storage method
1866 * is easily possible. */
1867 static ssize_t find_command_index (const char *cmd) /* {{{ */
1868 {
1869 size_t i;
1871 for (i = 0; i < list_of_commands_len; i++)
1872 if (strcasecmp(cmd, list_of_commands[i].cmd) == 0)
1873 return ((ssize_t) i);
1874 return (-1);
1875 } /* }}} ssize_t find_command_index */
1877 static int socket_permission_check (listen_socket_t *sock, /* {{{ */
1878 const char *cmd)
1879 {
1880 ssize_t i;
1882 if (JOURNAL_REPLAY(sock))
1883 return (1);
1885 if (cmd == NULL)
1886 return (-1);
1888 if ((strcasecmp ("QUIT", cmd) == 0)
1889 || (strcasecmp ("HELP", cmd) == 0))
1890 return (1);
1891 else if (strcmp (".", cmd) == 0)
1892 cmd = "BATCH";
1894 i = find_command_index (cmd);
1895 if (i < 0)
1896 return (-1);
1897 assert (i < 32);
1899 if ((sock->permissions & (1 << i)) != 0)
1900 return (1);
1901 return (0);
1902 } /* }}} int socket_permission_check */
1904 static int socket_permission_add (listen_socket_t *sock, /* {{{ */
1905 const char *cmd)
1906 {
1907 ssize_t i;
1909 i = find_command_index (cmd);
1910 if (i < 0)
1911 return (-1);
1912 assert (i < 32);
1914 sock->permissions |= (1 << i);
1915 return (0);
1916 } /* }}} int socket_permission_add */
1918 /* check whether commands are received in the expected context */
1919 static int command_check_context(listen_socket_t *sock, command_t *cmd)
1920 {
1921 if (JOURNAL_REPLAY(sock))
1922 return (cmd->context & CMD_CONTEXT_JOURNAL);
1923 else if (sock->batch_start)
1924 return (cmd->context & CMD_CONTEXT_BATCH);
1925 else
1926 return (cmd->context & CMD_CONTEXT_CLIENT);
1928 /* NOTREACHED */
1929 assert(1==0);
1930 }
1932 static int handle_request_help (HANDLER_PROTO) /* {{{ */
1933 {
1934 int status;
1935 char *cmd_str;
1936 char *resp_txt;
1937 command_t *help = NULL;
1939 status = buffer_get_field (&buffer, &buffer_size, &cmd_str);
1940 if (status == 0)
1941 help = find_command(cmd_str);
1943 if (help && (help->syntax || help->help))
1944 {
1945 char tmp[CMD_MAX];
1947 snprintf(tmp, sizeof(tmp)-1, "Help for %s\n", help->cmd);
1948 resp_txt = tmp;
1950 if (help->syntax)
1951 add_response_info(sock, "Usage: %s\n", help->syntax);
1953 if (help->help)
1954 add_response_info(sock, "%s\n", help->help);
1955 }
1956 else
1957 {
1958 size_t i;
1960 resp_txt = "Command overview\n";
1962 for (i = 0; i < list_of_commands_len; i++)
1963 {
1964 if (list_of_commands[i].syntax == NULL)
1965 continue;
1966 add_response_info (sock, "%s", list_of_commands[i].syntax);
1967 }
1968 }
1970 return send_response(sock, RESP_OK, resp_txt);
1971 } /* }}} int handle_request_help */
1973 static int handle_request (DISPATCH_PROTO) /* {{{ */
1974 {
1975 char *buffer_ptr = buffer;
1976 char *cmd_str = NULL;
1977 command_t *cmd = NULL;
1978 int status;
1980 assert (buffer[buffer_size - 1] == '\0');
1982 status = buffer_get_field (&buffer_ptr, &buffer_size, &cmd_str);
1983 if (status != 0)
1984 {
1985 RRDD_LOG (LOG_INFO, "handle_request: Unable parse command.");
1986 return (-1);
1987 }
1989 if (sock != NULL && sock->batch_start)
1990 sock->batch_cmd++;
1992 cmd = find_command(cmd_str);
1993 if (!cmd)
1994 return send_response(sock, RESP_ERR, "Unknown command: %s\n", cmd_str);
1996 if (!socket_permission_check (sock, cmd->cmd))
1997 return send_response(sock, RESP_ERR, "Permission denied.\n");
1999 if (!command_check_context(sock, cmd))
2000 return send_response(sock, RESP_ERR, "Can't use '%s' here.\n", cmd_str);
2002 return cmd->handler(cmd, sock, now, buffer_ptr, buffer_size);
2003 } /* }}} int handle_request */
2005 static void journal_set_free (journal_set *js) /* {{{ */
2006 {
2007 if (js == NULL)
2008 return;
2010 rrd_free_ptrs((void ***) &js->files, &js->files_num);
2012 free(js);
2013 } /* }}} journal_set_free */
2015 static void journal_set_remove (journal_set *js) /* {{{ */
2016 {
2017 if (js == NULL)
2018 return;
2020 for (uint i=0; i < js->files_num; i++)
2021 {
2022 RRDD_LOG(LOG_DEBUG, "removing old journal %s", js->files[i]);
2023 unlink(js->files[i]);
2024 }
2025 } /* }}} journal_set_remove */
2027 /* close current journal file handle.
2028 * MUST hold journal_lock before calling */
2029 static void journal_close(void) /* {{{ */
2030 {
2031 if (journal_fh != NULL)
2032 {
2033 if (fclose(journal_fh) != 0)
2034 RRDD_LOG(LOG_ERR, "cannot close journal: %s", rrd_strerror(errno));
2035 }
2037 journal_fh = NULL;
2038 journal_size = 0;
2039 } /* }}} journal_close */
2041 /* MUST hold journal_lock before calling */
2042 static void journal_new_file(void) /* {{{ */
2043 {
2044 struct timeval now;
2045 int new_fd;
2046 char new_file[PATH_MAX + 1];
2048 assert(journal_dir != NULL);
2049 assert(journal_cur != NULL);
2051 journal_close();
2053 gettimeofday(&now, NULL);
2054 /* this format assures that the files sort in strcmp() order */
2055 snprintf(new_file, PATH_MAX, "%s/%s.%010d.%06d",
2056 journal_dir, JOURNAL_BASE, (int)now.tv_sec, (int)now.tv_usec);
2058 new_fd = open(new_file, O_WRONLY|O_CREAT|O_APPEND,
2059 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
2060 if (new_fd < 0)
2061 goto error;
2063 journal_fh = fdopen(new_fd, "a");
2064 if (journal_fh == NULL)
2065 goto error;
2067 journal_size = ftell(journal_fh);
2068 RRDD_LOG(LOG_DEBUG, "started new journal %s", new_file);
2070 /* record the file in the journal set */
2071 rrd_add_strdup(&journal_cur->files, &journal_cur->files_num, new_file);
2073 return;
2075 error:
2076 RRDD_LOG(LOG_CRIT,
2077 "JOURNALING DISABLED: Error while trying to create %s : %s",
2078 new_file, rrd_strerror(errno));
2079 RRDD_LOG(LOG_CRIT,
2080 "JOURNALING DISABLED: All values will be flushed at shutdown");
2082 close(new_fd);
2083 config_flush_at_shutdown = 1;
2085 } /* }}} journal_new_file */
2087 /* MUST NOT hold journal_lock before calling this */
2088 static void journal_rotate(void) /* {{{ */
2089 {
2090 journal_set *old_js = NULL;
2092 if (journal_dir == NULL)
2093 return;
2095 RRDD_LOG(LOG_DEBUG, "rotating journals");
2097 pthread_mutex_lock(&stats_lock);
2098 ++stats_journal_rotate;
2099 pthread_mutex_unlock(&stats_lock);
2101 pthread_mutex_lock(&journal_lock);
2103 journal_close();
2105 /* rotate the journal sets */
2106 old_js = journal_old;
2107 journal_old = journal_cur;
2108 journal_cur = calloc(1, sizeof(journal_set));
2110 if (journal_cur != NULL)
2111 journal_new_file();
2112 else
2113 RRDD_LOG(LOG_CRIT, "journal_rotate: malloc(journal_set) failed\n");
2115 pthread_mutex_unlock(&journal_lock);
2117 journal_set_remove(old_js);
2118 journal_set_free (old_js);
2120 } /* }}} static void journal_rotate */
2122 /* MUST hold journal_lock when calling */
2123 static void journal_done(void) /* {{{ */
2124 {
2125 if (journal_cur == NULL)
2126 return;
2128 journal_close();
2130 if (config_flush_at_shutdown)
2131 {
2132 RRDD_LOG(LOG_INFO, "removing journals");
2133 journal_set_remove(journal_old);
2134 journal_set_remove(journal_cur);
2135 }
2136 else
2137 {
2138 RRDD_LOG(LOG_INFO, "expedited shutdown; "
2139 "journals will be used at next startup");
2140 }
2142 journal_set_free(journal_cur);
2143 journal_set_free(journal_old);
2144 free(journal_dir);
2146 } /* }}} static void journal_done */
2148 static int journal_write(char *cmd, char *args) /* {{{ */
2149 {
2150 int chars;
2152 if (journal_fh == NULL)
2153 return 0;
2155 pthread_mutex_lock(&journal_lock);
2156 chars = fprintf(journal_fh, "%s %s\n", cmd, args);
2157 journal_size += chars;
2159 if (journal_size > JOURNAL_MAX)
2160 journal_new_file();
2162 pthread_mutex_unlock(&journal_lock);
2164 if (chars > 0)
2165 {
2166 pthread_mutex_lock(&stats_lock);
2167 stats_journal_bytes += chars;
2168 pthread_mutex_unlock(&stats_lock);
2169 }
2171 return chars;
2172 } /* }}} static int journal_write */
2174 static int journal_replay (const char *file) /* {{{ */
2175 {
2176 FILE *fh;
2177 int entry_cnt = 0;
2178 int fail_cnt = 0;
2179 uint64_t line = 0;
2180 char entry[CMD_MAX];
2181 time_t now;
2183 if (file == NULL) return 0;
2185 {
2186 char *reason = "unknown error";
2187 int status = 0;
2188 struct stat statbuf;
2190 memset(&statbuf, 0, sizeof(statbuf));
2191 if (stat(file, &statbuf) != 0)
2192 {
2193 reason = "stat error";
2194 status = errno;
2195 }
2196 else if (!S_ISREG(statbuf.st_mode))
2197 {
2198 reason = "not a regular file";
2199 status = EPERM;
2200 }
2201 if (statbuf.st_uid != daemon_uid)
2202 {
2203 reason = "not owned by daemon user";
2204 status = EACCES;
2205 }
2206 if (statbuf.st_mode & (S_IWGRP|S_IWOTH))
2207 {
2208 reason = "must not be user/group writable";
2209 status = EACCES;
2210 }
2212 if (status != 0)
2213 {
2214 RRDD_LOG(LOG_ERR, "journal_replay: %s : %s (%s)",
2215 file, rrd_strerror(status), reason);
2216 return 0;
2217 }
2218 }
2220 fh = fopen(file, "r");
2221 if (fh == NULL)
2222 {
2223 if (errno != ENOENT)
2224 RRDD_LOG(LOG_ERR, "journal_replay: cannot open journal file: '%s' (%s)",
2225 file, rrd_strerror(errno));
2226 return 0;
2227 }
2228 else
2229 RRDD_LOG(LOG_NOTICE, "replaying from journal: %s", file);
2231 now = time(NULL);
2233 while(!feof(fh))
2234 {
2235 size_t entry_len;
2237 ++line;
2238 if (fgets(entry, sizeof(entry), fh) == NULL)
2239 break;
2240 entry_len = strlen(entry);
2242 /* check \n termination in case journal writing crashed mid-line */
2243 if (entry_len == 0)
2244 continue;
2245 else if (entry[entry_len - 1] != '\n')
2246 {
2247 RRDD_LOG(LOG_NOTICE, "Malformed journal entry at line %"PRIu64, line);
2248 ++fail_cnt;
2249 continue;
2250 }
2252 entry[entry_len - 1] = '\0';
2254 if (handle_request(NULL, now, entry, entry_len) == 0)
2255 ++entry_cnt;
2256 else
2257 ++fail_cnt;
2258 }
2260 fclose(fh);
2262 RRDD_LOG(LOG_INFO, "Replayed %d entries (%d failures)",
2263 entry_cnt, fail_cnt);
2265 return entry_cnt > 0 ? 1 : 0;
2266 } /* }}} static int journal_replay */
2268 static int journal_sort(const void *v1, const void *v2)
2269 {
2270 char **jn1 = (char **) v1;
2271 char **jn2 = (char **) v2;
2273 return strcmp(*jn1,*jn2);
2274 }
2276 static void journal_init(void) /* {{{ */
2277 {
2278 int had_journal = 0;
2279 DIR *dir;
2280 struct dirent *dent;
2281 char path[PATH_MAX+1];
2283 if (journal_dir == NULL) return;
2285 pthread_mutex_lock(&journal_lock);
2287 journal_cur = calloc(1, sizeof(journal_set));
2288 if (journal_cur == NULL)
2289 {
2290 RRDD_LOG(LOG_CRIT, "journal_rotate: malloc(journal_set) failed\n");
2291 return;
2292 }
2294 RRDD_LOG(LOG_INFO, "checking for journal files");
2296 /* Handle old journal files during transition. This gives them the
2297 * correct sort order. TODO: remove after first release
2298 */
2299 {
2300 char old_path[PATH_MAX+1];
2301 snprintf(old_path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".old" );
2302 snprintf(path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".0000");
2303 rename(old_path, path);
2305 snprintf(old_path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE );
2306 snprintf(path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".0001");
2307 rename(old_path, path);
2308 }
2310 dir = opendir(journal_dir);
2311 if (!dir) {
2312 RRDD_LOG(LOG_CRIT, "journal_init: opendir(%s) failed\n", journal_dir);
2313 return;
2314 }
2315 while ((dent = readdir(dir)) != NULL)
2316 {
2317 /* looks like a journal file? */
2318 if (strncmp(dent->d_name, JOURNAL_BASE, strlen(JOURNAL_BASE)))
2319 continue;
2321 snprintf(path, PATH_MAX, "%s/%s", journal_dir, dent->d_name);
2323 if (!rrd_add_strdup(&journal_cur->files, &journal_cur->files_num, path))
2324 {
2325 RRDD_LOG(LOG_CRIT, "journal_init: cannot add journal file %s!",
2326 dent->d_name);
2327 break;
2328 }
2329 }
2330 closedir(dir);
2332 qsort(journal_cur->files, journal_cur->files_num,
2333 sizeof(journal_cur->files[0]), journal_sort);
2335 for (uint i=0; i < journal_cur->files_num; i++)
2336 had_journal += journal_replay(journal_cur->files[i]);
2338 journal_new_file();
2340 /* it must have been a crash. start a flush */
2341 if (had_journal && config_flush_at_shutdown)
2342 flush_old_values(-1);
2344 pthread_mutex_unlock(&journal_lock);
2346 RRDD_LOG(LOG_INFO, "journal processing complete");
2348 } /* }}} static void journal_init */
2350 static void free_listen_socket(listen_socket_t *sock) /* {{{ */
2351 {
2352 assert(sock != NULL);
2354 free(sock->rbuf); sock->rbuf = NULL;
2355 free(sock->wbuf); sock->wbuf = NULL;
2356 free(sock);
2357 } /* }}} void free_listen_socket */
2359 static void close_connection(listen_socket_t *sock) /* {{{ */
2360 {
2361 if (sock->fd >= 0)
2362 {
2363 close(sock->fd);
2364 sock->fd = -1;
2365 }
2367 free_listen_socket(sock);
2369 } /* }}} void close_connection */
2371 static void *connection_thread_main (void *args) /* {{{ */
2372 {
2373 listen_socket_t *sock;
2374 int fd;
2376 sock = (listen_socket_t *) args;
2377 fd = sock->fd;
2379 /* init read buffers */
2380 sock->next_read = sock->next_cmd = 0;
2381 sock->rbuf = malloc(RBUF_SIZE);
2382 if (sock->rbuf == NULL)
2383 {
2384 RRDD_LOG(LOG_ERR, "connection_thread_main: cannot malloc read buffer");
2385 close_connection(sock);
2386 return NULL;
2387 }
2389 pthread_mutex_lock (&connection_threads_lock);
2390 connection_threads_num++;
2391 pthread_mutex_unlock (&connection_threads_lock);
2393 while (state == RUNNING)
2394 {
2395 char *cmd;
2396 ssize_t cmd_len;
2397 ssize_t rbytes;
2398 time_t now;
2400 struct pollfd pollfd;
2401 int status;
2403 pollfd.fd = fd;
2404 pollfd.events = POLLIN | POLLPRI;
2405 pollfd.revents = 0;
2407 status = poll (&pollfd, 1, /* timeout = */ 500);
2408 if (state != RUNNING)
2409 break;
2410 else if (status == 0) /* timeout */
2411 continue;
2412 else if (status < 0) /* error */
2413 {
2414 status = errno;
2415 if (status != EINTR)
2416 RRDD_LOG (LOG_ERR, "connection_thread_main: poll(2) failed.");
2417 continue;
2418 }
2420 if ((pollfd.revents & POLLHUP) != 0) /* normal shutdown */
2421 break;
2422 else if ((pollfd.revents & (POLLIN | POLLPRI)) == 0)
2423 {
2424 RRDD_LOG (LOG_WARNING, "connection_thread_main: "
2425 "poll(2) returned something unexpected: %#04hx",
2426 pollfd.revents);
2427 break;
2428 }
2430 rbytes = read(fd, sock->rbuf + sock->next_read,
2431 RBUF_SIZE - sock->next_read);
2432 if (rbytes < 0)
2433 {
2434 RRDD_LOG(LOG_ERR, "connection_thread_main: read() failed.");
2435 break;
2436 }
2437 else if (rbytes == 0)
2438 break; /* eof */
2440 sock->next_read += rbytes;
2442 if (sock->batch_start)
2443 now = sock->batch_start;
2444 else
2445 now = time(NULL);
2447 while ((cmd = next_cmd(sock, &cmd_len)) != NULL)
2448 {
2449 status = handle_request (sock, now, cmd, cmd_len+1);
2450 if (status != 0)
2451 goto out_close;
2452 }
2453 }
2455 out_close:
2456 close_connection(sock);
2458 /* Remove this thread from the connection threads list */
2459 pthread_mutex_lock (&connection_threads_lock);
2460 connection_threads_num--;
2461 if (connection_threads_num <= 0)
2462 pthread_cond_broadcast(&connection_threads_done);
2463 pthread_mutex_unlock (&connection_threads_lock);
2465 return (NULL);
2466 } /* }}} void *connection_thread_main */
2468 static int open_listen_socket_unix (const listen_socket_t *sock) /* {{{ */
2469 {
2470 int fd;
2471 struct sockaddr_un sa;
2472 listen_socket_t *temp;
2473 int status;
2474 const char *path;
2475 char *path_copy, *dir;
2477 path = sock->addr;
2478 if (strncmp(path, "unix:", strlen("unix:")) == 0)
2479 path += strlen("unix:");
2481 /* dirname may modify its argument */
2482 path_copy = strdup(path);
2483 if (path_copy == NULL)
2484 {
2485 fprintf(stderr, "rrdcached: strdup(): %s\n",
2486 rrd_strerror(errno));
2487 return (-1);
2488 }
2490 dir = dirname(path_copy);
2491 if (rrd_mkdir_p(dir, 0777) != 0)
2492 {
2493 fprintf(stderr, "Failed to create socket directory '%s': %s\n",
2494 dir, rrd_strerror(errno));
2495 return (-1);
2496 }
2498 free(path_copy);
2500 temp = (listen_socket_t *) rrd_realloc (listen_fds,
2501 sizeof (listen_fds[0]) * (listen_fds_num + 1));
2502 if (temp == NULL)
2503 {
2504 fprintf (stderr, "rrdcached: open_listen_socket_unix: realloc failed.\n");
2505 return (-1);
2506 }
2507 listen_fds = temp;
2508 memcpy (listen_fds + listen_fds_num, sock, sizeof (listen_fds[0]));
2510 fd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
2511 if (fd < 0)
2512 {
2513 fprintf (stderr, "rrdcached: unix socket(2) failed: %s\n",
2514 rrd_strerror(errno));
2515 return (-1);
2516 }
2518 memset (&sa, 0, sizeof (sa));
2519 sa.sun_family = AF_UNIX;
2520 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
2522 /* if we've gotten this far, we own the pid file. any daemon started
2523 * with the same args must not be alive. therefore, ensure that we can
2524 * create the socket...
2525 */
2526 unlink(path);
2528 status = bind (fd, (struct sockaddr *) &sa, sizeof (sa));
2529 if (status != 0)
2530 {
2531 fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
2532 path, rrd_strerror(errno));
2533 close (fd);
2534 return (-1);
2535 }
2537 /* tweak the sockets group ownership */
2538 if (sock->socket_group != (gid_t)-1)
2539 {
2540 if ( (chown(path, getuid(), sock->socket_group) != 0) ||
2541 (chmod(path, (S_IRUSR|S_IWUSR|S_IXUSR | S_IRGRP|S_IWGRP)) != 0) )
2542 {
2543 fprintf(stderr, "rrdcached: failed to set socket group permissions (%s)\n", strerror(errno));
2544 }
2545 }
2547 if (sock->socket_permissions != (mode_t)-1)
2548 {
2549 if (chmod(path, sock->socket_permissions) != 0)
2550 fprintf(stderr, "rrdcached: failed to set socket file permissions (%o): %s\n",
2551 (unsigned int)sock->socket_permissions, strerror(errno));
2552 }
2554 status = listen (fd, /* backlog = */ 10);
2555 if (status != 0)
2556 {
2557 fprintf (stderr, "rrdcached: listen(%s) failed: %s.\n",
2558 path, rrd_strerror(errno));
2559 close (fd);
2560 unlink (path);
2561 return (-1);
2562 }
2564 listen_fds[listen_fds_num].fd = fd;
2565 listen_fds[listen_fds_num].family = PF_UNIX;
2566 strncpy(listen_fds[listen_fds_num].addr, path,
2567 sizeof (listen_fds[listen_fds_num].addr) - 1);
2568 listen_fds_num++;
2570 return (0);
2571 } /* }}} int open_listen_socket_unix */
2573 static int open_listen_socket_network(const listen_socket_t *sock) /* {{{ */
2574 {
2575 struct addrinfo ai_hints;
2576 struct addrinfo *ai_res;
2577 struct addrinfo *ai_ptr;
2578 char addr_copy[NI_MAXHOST];
2579 char *addr;
2580 char *port;
2581 int status;
2583 strncpy (addr_copy, sock->addr, sizeof(addr_copy)-1);
2584 addr_copy[sizeof (addr_copy) - 1] = 0;
2585 addr = addr_copy;
2587 memset (&ai_hints, 0, sizeof (ai_hints));
2588 ai_hints.ai_flags = 0;
2589 #ifdef AI_ADDRCONFIG
2590 ai_hints.ai_flags |= AI_ADDRCONFIG;
2591 #endif
2592 ai_hints.ai_family = AF_UNSPEC;
2593 ai_hints.ai_socktype = SOCK_STREAM;
2595 port = NULL;
2596 if (*addr == '[') /* IPv6+port format */
2597 {
2598 /* `addr' is something like "[2001:780:104:2:211:24ff:feab:26f8]:12345" */
2599 addr++;
2601 port = strchr (addr, ']');
2602 if (port == NULL)
2603 {
2604 fprintf (stderr, "rrdcached: Malformed address: %s\n", sock->addr);
2605 return (-1);
2606 }
2607 *port = 0;
2608 port++;
2610 if (*port == ':')
2611 port++;
2612 else if (*port == 0)
2613 port = NULL;
2614 else
2615 {
2616 fprintf (stderr, "rrdcached: Garbage after address: %s\n", port);
2617 return (-1);
2618 }
2619 } /* if (*addr == '[') */
2620 else
2621 {
2622 port = rindex(addr, ':');
2623 if (port != NULL)
2624 {
2625 *port = 0;
2626 port++;
2627 }
2628 }
2629 ai_res = NULL;
2630 status = getaddrinfo (addr,
2631 port == NULL ? RRDCACHED_DEFAULT_PORT : port,
2632 &ai_hints, &ai_res);
2633 if (status != 0)
2634 {
2635 fprintf (stderr, "rrdcached: getaddrinfo(%s) failed: %s\n",
2636 addr, gai_strerror (status));
2637 return (-1);
2638 }
2640 for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2641 {
2642 int fd;
2643 listen_socket_t *temp;
2644 int one = 1;
2646 temp = (listen_socket_t *) rrd_realloc (listen_fds,
2647 sizeof (listen_fds[0]) * (listen_fds_num + 1));
2648 if (temp == NULL)
2649 {
2650 fprintf (stderr,
2651 "rrdcached: open_listen_socket_network: realloc failed.\n");
2652 continue;
2653 }
2654 listen_fds = temp;
2655 memcpy (listen_fds + listen_fds_num, sock, sizeof (listen_fds[0]));
2657 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
2658 if (fd < 0)
2659 {
2660 fprintf (stderr, "rrdcached: network socket(2) failed: %s.\n",
2661 rrd_strerror(errno));
2662 continue;
2663 }
2665 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
2667 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2668 if (status != 0)
2669 {
2670 fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
2671 sock->addr, rrd_strerror(errno));
2672 close (fd);
2673 continue;
2674 }
2676 status = listen (fd, /* backlog = */ 10);
2677 if (status != 0)
2678 {
2679 fprintf (stderr, "rrdcached: listen(%s) failed: %s\n.",
2680 sock->addr, rrd_strerror(errno));
2681 close (fd);
2682 freeaddrinfo(ai_res);
2683 return (-1);
2684 }
2686 listen_fds[listen_fds_num].fd = fd;
2687 listen_fds[listen_fds_num].family = ai_ptr->ai_family;
2688 listen_fds_num++;
2689 } /* for (ai_ptr) */
2691 freeaddrinfo(ai_res);
2692 return (0);
2693 } /* }}} static int open_listen_socket_network */
2695 static int open_listen_socket (const listen_socket_t *sock) /* {{{ */
2696 {
2697 assert(sock != NULL);
2698 assert(sock->addr != NULL);
2700 if (strncmp ("unix:", sock->addr, strlen ("unix:")) == 0
2701 || sock->addr[0] == '/')
2702 return (open_listen_socket_unix(sock));
2703 else
2704 return (open_listen_socket_network(sock));
2705 } /* }}} int open_listen_socket */
2707 static int close_listen_sockets (void) /* {{{ */
2708 {
2709 size_t i;
2711 for (i = 0; i < listen_fds_num; i++)
2712 {
2713 close (listen_fds[i].fd);
2715 if (listen_fds[i].family == PF_UNIX)
2716 unlink(listen_fds[i].addr);
2717 }
2719 free (listen_fds);
2720 listen_fds = NULL;
2721 listen_fds_num = 0;
2723 return (0);
2724 } /* }}} int close_listen_sockets */
2726 static void *listen_thread_main (void UNUSED(*args)) /* {{{ */
2727 {
2728 struct pollfd *pollfds;
2729 int pollfds_num;
2730 int status;
2731 int i;
2733 if (listen_fds_num < 1)
2734 {
2735 RRDD_LOG(LOG_ERR, "listen_thread_main: no listen_fds !");
2736 return (NULL);
2737 }
2739 pollfds_num = listen_fds_num;
2740 pollfds = (struct pollfd *) malloc (sizeof (*pollfds) * pollfds_num);
2741 if (pollfds == NULL)
2742 {
2743 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
2744 return (NULL);
2745 }
2746 memset (pollfds, 0, sizeof (*pollfds) * pollfds_num);
2748 RRDD_LOG(LOG_INFO, "listening for connections");
2750 while (state == RUNNING)
2751 {
2752 for (i = 0; i < pollfds_num; i++)
2753 {
2754 pollfds[i].fd = listen_fds[i].fd;
2755 pollfds[i].events = POLLIN | POLLPRI;
2756 pollfds[i].revents = 0;
2757 }
2759 status = poll (pollfds, pollfds_num, /* timeout = */ 1000);
2760 if (state != RUNNING)
2761 break;
2762 else if (status == 0) /* timeout */
2763 continue;
2764 else if (status < 0) /* error */
2765 {
2766 status = errno;
2767 if (status != EINTR)
2768 {
2769 RRDD_LOG (LOG_ERR, "listen_thread_main: poll(2) failed.");
2770 }
2771 continue;
2772 }
2774 for (i = 0; i < pollfds_num; i++)
2775 {
2776 listen_socket_t *client_sock;
2777 struct sockaddr_storage client_sa;
2778 socklen_t client_sa_size;
2779 pthread_t tid;
2780 pthread_attr_t attr;
2782 if (pollfds[i].revents == 0)
2783 continue;
2785 if ((pollfds[i].revents & (POLLIN | POLLPRI)) == 0)
2786 {
2787 RRDD_LOG (LOG_ERR, "listen_thread_main: "
2788 "poll(2) returned something unexpected for listen FD #%i.",
2789 pollfds[i].fd);
2790 continue;
2791 }
2793 client_sock = (listen_socket_t *) malloc (sizeof (listen_socket_t));
2794 if (client_sock == NULL)
2795 {
2796 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
2797 continue;
2798 }
2799 memcpy(client_sock, &listen_fds[i], sizeof(listen_fds[0]));
2801 client_sa_size = sizeof (client_sa);
2802 client_sock->fd = accept (pollfds[i].fd,
2803 (struct sockaddr *) &client_sa, &client_sa_size);
2804 if (client_sock->fd < 0)
2805 {
2806 RRDD_LOG (LOG_ERR, "listen_thread_main: accept(2) failed.");
2807 free(client_sock);
2808 continue;
2809 }
2811 pthread_attr_init (&attr);
2812 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
2814 status = pthread_create (&tid, &attr, connection_thread_main,
2815 client_sock);
2816 if (status != 0)
2817 {
2818 RRDD_LOG (LOG_ERR, "listen_thread_main: pthread_create failed.");
2819 close_connection(client_sock);
2820 continue;
2821 }
2822 } /* for (pollfds_num) */
2823 } /* while (state == RUNNING) */
2825 RRDD_LOG(LOG_INFO, "starting shutdown");
2827 close_listen_sockets ();
2829 pthread_mutex_lock (&connection_threads_lock);
2830 while (connection_threads_num > 0)
2831 pthread_cond_wait(&connection_threads_done, &connection_threads_lock);
2832 pthread_mutex_unlock (&connection_threads_lock);
2834 free(pollfds);
2836 return (NULL);
2837 } /* }}} void *listen_thread_main */
2839 static int daemonize (void) /* {{{ */
2840 {
2841 int pid_fd;
2842 char *base_dir;
2844 daemon_uid = geteuid();
2846 pid_fd = open_pidfile("create", O_CREAT|O_EXCL|O_WRONLY);
2847 if (pid_fd < 0)
2848 pid_fd = check_pidfile();
2849 if (pid_fd < 0)
2850 return pid_fd;
2852 /* open all the listen sockets */
2853 if (config_listen_address_list_len > 0)
2854 {
2855 for (size_t i = 0; i < config_listen_address_list_len; i++)
2856 open_listen_socket (config_listen_address_list[i]);
2858 rrd_free_ptrs((void ***) &config_listen_address_list,
2859 &config_listen_address_list_len);
2860 }
2861 else
2862 {
2863 listen_socket_t sock;
2864 memset(&sock, 0, sizeof(sock));
2865 strncpy(sock.addr, RRDCACHED_DEFAULT_ADDRESS, sizeof(sock.addr)-1);
2866 open_listen_socket (&sock);
2867 }
2869 if (listen_fds_num < 1)
2870 {
2871 fprintf (stderr, "rrdcached: FATAL: cannot open any listen sockets\n");
2872 goto error;
2873 }
2875 if (!stay_foreground)
2876 {
2877 pid_t child;
2879 child = fork ();
2880 if (child < 0)
2881 {
2882 fprintf (stderr, "daemonize: fork(2) failed.\n");
2883 goto error;
2884 }
2885 else if (child > 0)
2886 exit(0);
2888 /* Become session leader */
2889 setsid ();
2891 /* Open the first three file descriptors to /dev/null */
2892 close (2);
2893 close (1);
2894 close (0);
2896 open ("/dev/null", O_RDWR);
2897 if (dup(0) == -1 || dup(0) == -1){
2898 RRDD_LOG (LOG_ERR, "faild to run dup.\n");
2899 }
2900 } /* if (!stay_foreground) */
2902 /* Change into the /tmp directory. */
2903 base_dir = (config_base_dir != NULL)
2904 ? config_base_dir
2905 : "/tmp";
2907 if (chdir (base_dir) != 0)
2908 {
2909 fprintf (stderr, "daemonize: chdir (%s) failed.\n", base_dir);
2910 goto error;
2911 }
2913 install_signal_handlers();
2915 openlog ("rrdcached", LOG_PID, LOG_DAEMON);
2916 RRDD_LOG(LOG_INFO, "starting up");
2918 cache_tree = g_tree_new_full ((GCompareDataFunc) strcmp, NULL, NULL,
2919 (GDestroyNotify) free_cache_item);
2920 if (cache_tree == NULL)
2921 {
2922 RRDD_LOG (LOG_ERR, "daemonize: g_tree_new failed.");
2923 goto error;
2924 }
2926 return write_pidfile (pid_fd);
2928 error:
2929 remove_pidfile();
2930 return -1;
2931 } /* }}} int daemonize */
2933 static int cleanup (void) /* {{{ */
2934 {
2935 pthread_cond_broadcast (&flush_cond);
2936 pthread_join (flush_thread, NULL);
2938 pthread_cond_broadcast (&queue_cond);
2939 for (int i = 0; i < config_queue_threads; i++)
2940 pthread_join (queue_threads[i], NULL);
2942 if (config_flush_at_shutdown)
2943 {
2944 assert(cache_queue_head == NULL);
2945 RRDD_LOG(LOG_INFO, "clean shutdown; all RRDs flushed");
2946 }
2948 free(queue_threads);
2949 free(config_base_dir);
2951 pthread_mutex_lock(&cache_lock);
2952 g_tree_destroy(cache_tree);
2954 pthread_mutex_lock(&journal_lock);
2955 journal_done();
2957 RRDD_LOG(LOG_INFO, "goodbye");
2958 closelog ();
2960 remove_pidfile ();
2961 free(config_pid_file);
2963 return (0);
2964 } /* }}} int cleanup */
2966 static int read_options (int argc, char **argv) /* {{{ */
2967 {
2968 int option;
2969 int status = 0;
2971 char **permissions = NULL;
2972 size_t permissions_len = 0;
2974 gid_t socket_group = (gid_t)-1;
2975 mode_t socket_permissions = (mode_t)-1;
2977 while ((option = getopt(argc, argv, "gl:s:m:P:f:w:z:t:Bb:p:Fj:a:h?")) != -1)
2978 {
2979 switch (option)
2980 {
2981 case 'g':
2982 stay_foreground=1;
2983 break;
2985 case 'l':
2986 {
2987 listen_socket_t *new;
2989 new = malloc(sizeof(listen_socket_t));
2990 if (new == NULL)
2991 {
2992 fprintf(stderr, "read_options: malloc failed.\n");
2993 return(2);
2994 }
2995 memset(new, 0, sizeof(listen_socket_t));
2997 strncpy(new->addr, optarg, sizeof(new->addr)-1);
2999 /* Add permissions to the socket {{{ */
3000 if (permissions_len != 0)
3001 {
3002 size_t i;
3003 for (i = 0; i < permissions_len; i++)
3004 {
3005 status = socket_permission_add (new, permissions[i]);
3006 if (status != 0)
3007 {
3008 fprintf (stderr, "read_options: Adding permission \"%s\" to "
3009 "socket failed. Most likely, this permission doesn't "
3010 "exist. Check your command line.\n", permissions[i]);
3011 status = 4;
3012 }
3013 }
3014 }
3015 else /* if (permissions_len == 0) */
3016 {
3017 /* Add permission for ALL commands to the socket. */
3018 size_t i;
3019 for (i = 0; i < list_of_commands_len; i++)
3020 {
3021 status = socket_permission_add (new, list_of_commands[i].cmd);
3022 if (status != 0)
3023 {
3024 fprintf (stderr, "read_options: Adding permission \"%s\" to "
3025 "socket failed. This should never happen, ever! Sorry.\n",
3026 permissions[i]);
3027 status = 4;
3028 }
3029 }
3030 }
3031 /* }}} Done adding permissions. */
3033 new->socket_group = socket_group;
3034 new->socket_permissions = socket_permissions;
3036 if (!rrd_add_ptr((void ***)&config_listen_address_list,
3037 &config_listen_address_list_len, new))
3038 {
3039 fprintf(stderr, "read_options: rrd_add_ptr failed.\n");
3040 return (2);
3041 }
3042 }
3043 break;
3045 /* set socket group permissions */
3046 case 's':
3047 {
3048 gid_t group_gid;
3049 struct group *grp;
3051 group_gid = strtoul(optarg, NULL, 10);
3052 if (errno != EINVAL && group_gid>0)
3053 {
3054 /* we were passed a number */
3055 grp = getgrgid(group_gid);
3056 }
3057 else
3058 {
3059 grp = getgrnam(optarg);
3060 }
3062 if (grp)
3063 {
3064 socket_group = grp->gr_gid;
3065 }
3066 else
3067 {
3068 /* no idea what the user wanted... */
3069 fprintf (stderr, "read_options: couldn't map \"%s\" to a group, Sorry\n", optarg);
3070 return (5);
3071 }
3072 }
3073 break;
3075 /* set socket file permissions */
3076 case 'm':
3077 {
3078 long tmp;
3079 char *endptr = NULL;
3081 tmp = strtol (optarg, &endptr, 8);
3082 if ((endptr == optarg) || (! endptr) || (*endptr != '\0')
3083 || (tmp > 07777) || (tmp < 0)) {
3084 fprintf (stderr, "read_options: Invalid file mode \"%s\".\n",
3085 optarg);
3086 return (5);
3087 }
3089 socket_permissions = (mode_t)tmp;
3090 }
3091 break;
3093 case 'P':
3094 {
3095 char *optcopy;
3096 char *saveptr;
3097 char *dummy;
3098 char *ptr;
3100 rrd_free_ptrs ((void *) &permissions, &permissions_len);
3102 optcopy = strdup (optarg);
3103 dummy = optcopy;
3104 saveptr = NULL;
3105 while ((ptr = strtok_r (dummy, ", ", &saveptr)) != NULL)
3106 {
3107 dummy = NULL;
3108 rrd_add_strdup ((void *) &permissions, &permissions_len, ptr);
3109 }
3111 free (optcopy);
3112 }
3113 break;
3115 case 'f':
3116 {
3117 int temp;
3119 temp = atoi (optarg);
3120 if (temp > 0)
3121 config_flush_interval = temp;
3122 else
3123 {
3124 fprintf (stderr, "Invalid flush interval: %s\n", optarg);
3125 status = 3;
3126 }
3127 }
3128 break;
3130 case 'w':
3131 {
3132 int temp;
3134 temp = atoi (optarg);
3135 if (temp > 0)
3136 config_write_interval = temp;
3137 else
3138 {
3139 fprintf (stderr, "Invalid write interval: %s\n", optarg);
3140 status = 2;
3141 }
3142 }
3143 break;
3145 case 'z':
3146 {
3147 int temp;
3149 temp = atoi(optarg);
3150 if (temp > 0)
3151 config_write_jitter = temp;
3152 else
3153 {
3154 fprintf (stderr, "Invalid write jitter: -z %s\n", optarg);
3155 status = 2;
3156 }
3158 break;
3159 }
3161 case 't':
3162 {
3163 int threads;
3164 threads = atoi(optarg);
3165 if (threads >= 1)
3166 config_queue_threads = threads;
3167 else
3168 {
3169 fprintf (stderr, "Invalid thread count: -t %s\n", optarg);
3170 return 1;
3171 }
3172 }
3173 break;
3175 case 'B':
3176 config_write_base_only = 1;
3177 break;
3179 case 'b':
3180 {
3181 size_t len;
3182 char base_realpath[PATH_MAX];
3184 if (config_base_dir != NULL)
3185 free (config_base_dir);
3186 config_base_dir = strdup (optarg);
3187 if (config_base_dir == NULL)
3188 {
3189 fprintf (stderr, "read_options: strdup failed.\n");
3190 return (3);
3191 }
3193 if (rrd_mkdir_p (config_base_dir, 0777) != 0)
3194 {
3195 fprintf (stderr, "Failed to create base directory '%s': %s\n",
3196 config_base_dir, rrd_strerror (errno));
3197 return (3);
3198 }
3200 /* make sure that the base directory is not resolved via
3201 * symbolic links. this makes some performance-enhancing
3202 * assumptions possible (we don't have to resolve paths
3203 * that start with a "/")
3204 */
3205 if (realpath(config_base_dir, base_realpath) == NULL)
3206 {
3207 fprintf (stderr, "Failed to canonicalize the base directory '%s': "
3208 "%s\n", config_base_dir, rrd_strerror(errno));
3209 return 5;
3210 }
3212 len = strlen (config_base_dir);
3213 while ((len > 0) && (config_base_dir[len - 1] == '/'))
3214 {
3215 config_base_dir[len - 1] = 0;
3216 len--;
3217 }
3219 if (len < 1)
3220 {
3221 fprintf (stderr, "Invalid base directory: %s\n", optarg);
3222 return (4);
3223 }
3225 _config_base_dir_len = len;
3227 len = strlen (base_realpath);
3228 while ((len > 0) && (base_realpath[len - 1] == '/'))
3229 {
3230 base_realpath[len - 1] = '\0';
3231 len--;
3232 }
3234 if (strncmp(config_base_dir,
3235 base_realpath, sizeof(base_realpath)) != 0)
3236 {
3237 fprintf(stderr,
3238 "Base directory (-b) resolved via file system links!\n"
3239 "Please consult rrdcached '-b' documentation!\n"
3240 "Consider specifying the real directory (%s)\n",
3241 base_realpath);
3242 return 5;
3243 }
3244 }
3245 break;
3247 case 'p':
3248 {
3249 if (config_pid_file != NULL)
3250 free (config_pid_file);
3251 config_pid_file = strdup (optarg);
3252 if (config_pid_file == NULL)
3253 {
3254 fprintf (stderr, "read_options: strdup failed.\n");
3255 return (3);
3256 }
3257 }
3258 break;
3260 case 'F':
3261 config_flush_at_shutdown = 1;
3262 break;
3264 case 'j':
3265 {
3266 char journal_dir_actual[PATH_MAX];
3267 const char *dir;
3268 dir = journal_dir = strdup(realpath((const char *)optarg, journal_dir_actual));
3270 status = rrd_mkdir_p(dir, 0777);
3271 if (status != 0)
3272 {
3273 fprintf(stderr, "Failed to create journal directory '%s': %s\n",
3274 dir, rrd_strerror(errno));
3275 return 6;
3276 }
3278 if (access(dir, R_OK|W_OK|X_OK) != 0)
3279 {
3280 fprintf(stderr, "Must specify a writable directory with -j! (%s)\n",
3281 errno ? rrd_strerror(errno) : "");
3282 return 6;
3283 }
3284 }
3285 break;
3287 case 'a':
3288 {
3289 int temp = atoi(optarg);
3290 if (temp > 0)
3291 config_alloc_chunk = temp;
3292 else
3293 {
3294 fprintf(stderr, "Invalid allocation size: %s\n", optarg);
3295 return 10;
3296 }
3297 }
3298 break;
3300 case 'h':
3301 case '?':
3302 printf ("RRDCacheD %s\n"
3303 "Copyright (C) 2008,2009 Florian octo Forster and Kevin Brintnall\n"
3304 "\n"
3305 "Usage: rrdcached [options]\n"
3306 "\n"
3307 "Valid options are:\n"
3308 " -l <address> Socket address to listen to.\n"
3309 " -P <perms> Sets the permissions to assign to all following "
3310 "sockets\n"
3311 " -w <seconds> Interval in which to write data.\n"
3312 " -z <delay> Delay writes up to <delay> seconds to spread load\n"
3313 " -t <threads> Number of write threads.\n"
3314 " -f <seconds> Interval in which to flush dead data.\n"
3315 " -p <file> Location of the PID-file.\n"
3316 " -b <dir> Base directory to change to.\n"
3317 " -B Restrict file access to paths within -b <dir>\n"
3318 " -g Do not fork and run in the foreground.\n"
3319 " -j <dir> Directory in which to create the journal files.\n"
3320 " -F Always flush all updates at shutdown\n"
3321 " -s <id|name> Group owner of all following UNIX sockets\n"
3322 " (the socket will also have read/write permissions "
3323 "for that group)\n"
3324 " -m <mode> File permissions (octal) of all following UNIX "
3325 "sockets\n"
3326 " -a <size> Memory allocation chunk size. Default is 1."
3327 "\n"
3328 "For more information and a detailed description of all options "
3329 "please refer\n"
3330 "to the rrdcached(1) manual page.\n",
3331 VERSION);
3332 if (option == 'h')
3333 status = -1;
3334 else
3335 status = 1;
3336 break;
3337 } /* switch (option) */
3338 } /* while (getopt) */
3340 /* advise the user when values are not sane */
3341 if (config_flush_interval < 2 * config_write_interval)
3342 fprintf(stderr, "WARNING: flush interval (-f) should be at least"
3343 " 2x write interval (-w) !\n");
3344 if (config_write_jitter > config_write_interval)
3345 fprintf(stderr, "WARNING: write delay (-z) should NOT be larger than"
3346 " write interval (-w) !\n");
3348 if (config_write_base_only && config_base_dir == NULL)
3349 fprintf(stderr, "WARNING: -B does not make sense without -b!\n"
3350 " Consult the rrdcached documentation\n");
3352 if (journal_dir == NULL)
3353 config_flush_at_shutdown = 1;
3355 rrd_free_ptrs ((void *) &permissions, &permissions_len);
3357 return (status);
3358 } /* }}} int read_options */
3360 int main (int argc, char **argv)
3361 {
3362 int status;
3364 status = read_options (argc, argv);
3365 if (status != 0)
3366 {
3367 if (status < 0)
3368 status = 0;
3369 return (status);
3370 }
3372 status = daemonize ();
3373 if (status != 0)
3374 {
3375 fprintf (stderr, "rrdcached: daemonize failed, exiting.\n");
3376 return (1);
3377 }
3379 journal_init();
3381 /* start the queue threads */
3382 queue_threads = calloc(config_queue_threads, sizeof(*queue_threads));
3383 if (queue_threads == NULL)
3384 {
3385 RRDD_LOG (LOG_ERR, "FATAL: cannot calloc queue threads");
3386 cleanup();
3387 return (1);
3388 }
3389 for (int i = 0; i < config_queue_threads; i++)
3390 {
3391 memset (&queue_threads[i], 0, sizeof (*queue_threads));
3392 status = pthread_create (&queue_threads[i], NULL, queue_thread_main, NULL);
3393 if (status != 0)
3394 {
3395 RRDD_LOG (LOG_ERR, "FATAL: cannot create queue thread");
3396 cleanup();
3397 return (1);
3398 }
3399 }
3401 /* start the flush thread */
3402 memset(&flush_thread, 0, sizeof(flush_thread));
3403 status = pthread_create (&flush_thread, NULL, flush_thread_main, NULL);
3404 if (status != 0)
3405 {
3406 RRDD_LOG (LOG_ERR, "FATAL: cannot create flush thread");
3407 cleanup();
3408 return (1);
3409 }
3411 listen_thread_main (NULL);
3412 cleanup ();
3414 return (0);
3415 } /* int main */
3417 /*
3418 * vim: set sw=2 sts=2 ts=8 et fdm=marker :
3419 */