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 rrd_time_value_t start_tv;
1485 rrd_time_value_t end_tv;
1486 time_t start_tm;
1487 time_t end_tm;
1489 unsigned long step;
1490 unsigned long ds_cnt;
1491 char **ds_namv;
1492 rrd_value_t *data;
1494 int status;
1495 unsigned long i;
1496 time_t t;
1497 rrd_value_t *data_ptr;
1499 file = NULL;
1500 cf = NULL;
1501 start_str = NULL;
1502 end_str = NULL;
1504 /* Read the arguments */
1505 do /* while (0) */
1506 {
1507 status = buffer_get_field (&buffer, &buffer_size, &file);
1508 if (status != 0)
1509 break;
1511 status = buffer_get_field (&buffer, &buffer_size, &cf);
1512 if (status != 0)
1513 break;
1515 status = buffer_get_field (&buffer, &buffer_size, &start_str);
1516 if (status != 0)
1517 {
1518 start_str = NULL;
1519 status = 0;
1520 break;
1521 }
1523 status = buffer_get_field (&buffer, &buffer_size, &end_str);
1524 if (status != 0)
1525 {
1526 end_str = NULL;
1527 status = 0;
1528 break;
1529 }
1530 } while (0);
1532 if (status != 0)
1533 return (syntax_error(sock,cmd));
1535 status = flush_file (file);
1536 if ((status != 0) && (status != ENOENT))
1537 return (send_response (sock, RESP_ERR,
1538 "flush_file (%s) failed with status %i.\n", file, status));
1540 /* Parse start time */
1541 if (start_str != NULL)
1542 {
1543 const char *errmsg;
1545 errmsg = rrd_parsetime (start_str, &start_tv);
1546 if (errmsg != NULL)
1547 return (send_response(sock, RESP_ERR,
1548 "Cannot parse start time `%s': %s\n", start_str, errmsg));
1549 }
1550 else
1551 rrd_parsetime ("-86400", &start_tv);
1553 /* Parse end time */
1554 if (end_str != NULL)
1555 {
1556 const char *errmsg;
1558 errmsg = rrd_parsetime (end_str, &end_tv);
1559 if (errmsg != NULL)
1560 return (send_response(sock, RESP_ERR,
1561 "Cannot parse end time `%s': %s\n", end_str, errmsg));
1562 }
1563 else
1564 rrd_parsetime ("now", &end_tv);
1566 start_tm = 0;
1567 end_tm = 0;
1568 status = rrd_proc_start_end (&start_tv, &end_tv, &start_tm, &end_tm);
1569 if (status != 0)
1570 return (send_response(sock, RESP_ERR,
1571 "rrd_proc_start_end failed: %s\n", rrd_get_error ()));
1573 step = -1;
1574 ds_cnt = 0;
1575 ds_namv = NULL;
1576 data = NULL;
1578 status = rrd_fetch_r (file, cf, &start_tm, &end_tm, &step,
1579 &ds_cnt, &ds_namv, &data);
1580 if (status != 0)
1581 return (send_response(sock, RESP_ERR,
1582 "rrd_fetch_r failed: %s\n", rrd_get_error ()));
1584 add_response_info (sock, "FlushVersion: %lu\n", 1);
1585 add_response_info (sock, "Start: %lu\n", (unsigned long) start_tm);
1586 add_response_info (sock, "End: %lu\n", (unsigned long) end_tm);
1587 add_response_info (sock, "Step: %lu\n", step);
1588 add_response_info (sock, "DSCount: %lu\n", ds_cnt);
1590 #define SSTRCAT(buffer,str,buffer_fill) do { \
1591 size_t str_len = strlen (str); \
1592 if ((buffer_fill + str_len) > sizeof (buffer)) \
1593 str_len = sizeof (buffer) - buffer_fill; \
1594 if (str_len > 0) { \
1595 strncpy (buffer + buffer_fill, str, str_len); \
1596 buffer_fill += str_len; \
1597 assert (buffer_fill <= sizeof (buffer)); \
1598 if (buffer_fill == sizeof (buffer)) \
1599 buffer[buffer_fill - 1] = 0; \
1600 else \
1601 buffer[buffer_fill] = 0; \
1602 } \
1603 } while (0)
1605 { /* Add list of DS names */
1606 char linebuf[1024];
1607 size_t linebuf_fill;
1609 memset (linebuf, 0, sizeof (linebuf));
1610 linebuf_fill = 0;
1611 for (i = 0; i < ds_cnt; i++)
1612 {
1613 if (i > 0)
1614 SSTRCAT (linebuf, " ", linebuf_fill);
1615 SSTRCAT (linebuf, ds_namv[i], linebuf_fill);
1616 }
1617 add_response_info (sock, "DSName: %s\n", linebuf);
1618 }
1620 /* Add the actual data */
1621 assert (step > 0);
1622 data_ptr = data;
1623 for (t = start_tm + step; t <= end_tm; t += step)
1624 {
1625 char linebuf[1024];
1626 size_t linebuf_fill;
1627 char tmp[128];
1629 memset (linebuf, 0, sizeof (linebuf));
1630 linebuf_fill = 0;
1631 for (i = 0; i < ds_cnt; i++)
1632 {
1633 snprintf (tmp, sizeof (tmp), " %0.10e", *data_ptr);
1634 tmp[sizeof (tmp) - 1] = 0;
1635 SSTRCAT (linebuf, tmp, linebuf_fill);
1637 data_ptr++;
1638 }
1640 add_response_info (sock, "%10lu:%s\n", (unsigned long) t, linebuf);
1641 } /* for (t) */
1643 return (send_response (sock, RESP_OK, "Success\n"));
1644 #undef SSTRCAT
1645 } /* }}} int handle_request_fetch */
1647 /* we came across a "WROTE" entry during journal replay.
1648 * throw away any values that we have accumulated for this file
1649 */
1650 static int handle_request_wrote (HANDLER_PROTO) /* {{{ */
1651 {
1652 cache_item_t *ci;
1653 const char *file = buffer;
1655 pthread_mutex_lock(&cache_lock);
1657 ci = g_tree_lookup(cache_tree, file);
1658 if (ci == NULL)
1659 {
1660 pthread_mutex_unlock(&cache_lock);
1661 return (0);
1662 }
1664 if (ci->values)
1665 rrd_free_ptrs((void ***) &ci->values, &ci->values_num);
1667 wipe_ci_values(ci, now);
1668 remove_from_queue(ci);
1670 pthread_mutex_unlock(&cache_lock);
1671 return (0);
1672 } /* }}} int handle_request_wrote */
1674 /* start "BATCH" processing */
1675 static int batch_start (HANDLER_PROTO) /* {{{ */
1676 {
1677 int status;
1678 if (sock->batch_start)
1679 return send_response(sock, RESP_ERR, "Already in BATCH\n");
1681 status = send_response(sock, RESP_OK,
1682 "Go ahead. End with dot '.' on its own line.\n");
1683 sock->batch_start = time(NULL);
1684 sock->batch_cmd = 0;
1686 return status;
1687 } /* }}} static int batch_start */
1689 /* finish "BATCH" processing and return results to the client */
1690 static int batch_done (HANDLER_PROTO) /* {{{ */
1691 {
1692 assert(sock->batch_start);
1693 sock->batch_start = 0;
1694 sock->batch_cmd = 0;
1695 return send_response(sock, RESP_OK, "errors\n");
1696 } /* }}} static int batch_done */
1698 static int handle_request_quit (HANDLER_PROTO) /* {{{ */
1699 {
1700 return -1;
1701 } /* }}} static int handle_request_quit */
1703 static command_t list_of_commands[] = { /* {{{ */
1704 {
1705 "UPDATE",
1706 handle_request_update,
1707 CMD_CONTEXT_ANY,
1708 "UPDATE <filename> <values> [<values> ...]\n"
1709 ,
1710 "Adds the given file to the internal cache if it is not yet known and\n"
1711 "appends the given value(s) to the entry. See the rrdcached(1) manpage\n"
1712 "for details.\n"
1713 "\n"
1714 "Each <values> has the following form:\n"
1715 " <values> = <time>:<value>[:<value>[...]]\n"
1716 "See the rrdupdate(1) manpage for details.\n"
1717 },
1718 {
1719 "WROTE",
1720 handle_request_wrote,
1721 CMD_CONTEXT_JOURNAL,
1722 NULL,
1723 NULL
1724 },
1725 {
1726 "FLUSH",
1727 handle_request_flush,
1728 CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
1729 "FLUSH <filename>\n"
1730 ,
1731 "Adds the given filename to the head of the update queue and returns\n"
1732 "after it has been dequeued.\n"
1733 },
1734 {
1735 "FLUSHALL",
1736 handle_request_flushall,
1737 CMD_CONTEXT_CLIENT,
1738 "FLUSHALL\n"
1739 ,
1740 "Triggers writing of all pending updates. Returns immediately.\n"
1741 },
1742 {
1743 "PENDING",
1744 handle_request_pending,
1745 CMD_CONTEXT_CLIENT,
1746 "PENDING <filename>\n"
1747 ,
1748 "Shows any 'pending' updates for a file, in order.\n"
1749 "The updates shown have not yet been written to the underlying RRD file.\n"
1750 },
1751 {
1752 "FORGET",
1753 handle_request_forget,
1754 CMD_CONTEXT_ANY,
1755 "FORGET <filename>\n"
1756 ,
1757 "Removes the file completely from the cache.\n"
1758 "Any pending updates for the file will be lost.\n"
1759 },
1760 {
1761 "QUEUE",
1762 handle_request_queue,
1763 CMD_CONTEXT_CLIENT,
1764 "QUEUE\n"
1765 ,
1766 "Shows all files in the output queue.\n"
1767 "The output is zero or more lines in the following format:\n"
1768 "(where <num_vals> is the number of values to be written)\n"
1769 "\n"
1770 "<num_vals> <filename>\n"
1771 },
1772 {
1773 "STATS",
1774 handle_request_stats,
1775 CMD_CONTEXT_CLIENT,
1776 "STATS\n"
1777 ,
1778 "Returns some performance counters, see the rrdcached(1) manpage for\n"
1779 "a description of the values.\n"
1780 },
1781 {
1782 "HELP",
1783 handle_request_help,
1784 CMD_CONTEXT_CLIENT,
1785 "HELP [<command>]\n",
1786 NULL, /* special! */
1787 },
1788 {
1789 "BATCH",
1790 batch_start,
1791 CMD_CONTEXT_CLIENT,
1792 "BATCH\n"
1793 ,
1794 "The 'BATCH' command permits the client to initiate a bulk load\n"
1795 " of commands to rrdcached.\n"
1796 "\n"
1797 "Usage:\n"
1798 "\n"
1799 " client: BATCH\n"
1800 " server: 0 Go ahead. End with dot '.' on its own line.\n"
1801 " client: command #1\n"
1802 " client: command #2\n"
1803 " client: ... and so on\n"
1804 " client: .\n"
1805 " server: 2 errors\n"
1806 " server: 7 message for command #7\n"
1807 " server: 9 message for command #9\n"
1808 "\n"
1809 "For more information, consult the rrdcached(1) documentation.\n"
1810 },
1811 {
1812 ".", /* BATCH terminator */
1813 batch_done,
1814 CMD_CONTEXT_BATCH,
1815 NULL,
1816 NULL
1817 },
1818 {
1819 "FETCH",
1820 handle_request_fetch,
1821 CMD_CONTEXT_CLIENT,
1822 "FETCH <file> <CF> [<start> [<end>]]\n"
1823 ,
1824 "The 'FETCH' can be used by the client to retrieve values from an RRD file.\n"
1825 },
1826 {
1827 "QUIT",
1828 handle_request_quit,
1829 CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
1830 "QUIT\n"
1831 ,
1832 "Disconnect from rrdcached.\n"
1833 }
1834 }; /* }}} command_t list_of_commands[] */
1835 static size_t list_of_commands_len = sizeof (list_of_commands)
1836 / sizeof (list_of_commands[0]);
1838 static command_t *find_command(char *cmd)
1839 {
1840 size_t i;
1842 for (i = 0; i < list_of_commands_len; i++)
1843 if (strcasecmp(cmd, list_of_commands[i].cmd) == 0)
1844 return (&list_of_commands[i]);
1845 return NULL;
1846 }
1848 /* We currently use the index in the `list_of_commands' array as a bit position
1849 * in `listen_socket_t.permissions'. This member schould NEVER be accessed from
1850 * outside these functions so that switching to a more elegant storage method
1851 * is easily possible. */
1852 static ssize_t find_command_index (const char *cmd) /* {{{ */
1853 {
1854 size_t i;
1856 for (i = 0; i < list_of_commands_len; i++)
1857 if (strcasecmp(cmd, list_of_commands[i].cmd) == 0)
1858 return ((ssize_t) i);
1859 return (-1);
1860 } /* }}} ssize_t find_command_index */
1862 static int socket_permission_check (listen_socket_t *sock, /* {{{ */
1863 const char *cmd)
1864 {
1865 ssize_t i;
1867 if (JOURNAL_REPLAY(sock))
1868 return (1);
1870 if (cmd == NULL)
1871 return (-1);
1873 if ((strcasecmp ("QUIT", cmd) == 0)
1874 || (strcasecmp ("HELP", cmd) == 0))
1875 return (1);
1876 else if (strcmp (".", cmd) == 0)
1877 cmd = "BATCH";
1879 i = find_command_index (cmd);
1880 if (i < 0)
1881 return (-1);
1882 assert (i < 32);
1884 if ((sock->permissions & (1 << i)) != 0)
1885 return (1);
1886 return (0);
1887 } /* }}} int socket_permission_check */
1889 static int socket_permission_add (listen_socket_t *sock, /* {{{ */
1890 const char *cmd)
1891 {
1892 ssize_t i;
1894 i = find_command_index (cmd);
1895 if (i < 0)
1896 return (-1);
1897 assert (i < 32);
1899 sock->permissions |= (1 << i);
1900 return (0);
1901 } /* }}} int socket_permission_add */
1903 /* check whether commands are received in the expected context */
1904 static int command_check_context(listen_socket_t *sock, command_t *cmd)
1905 {
1906 if (JOURNAL_REPLAY(sock))
1907 return (cmd->context & CMD_CONTEXT_JOURNAL);
1908 else if (sock->batch_start)
1909 return (cmd->context & CMD_CONTEXT_BATCH);
1910 else
1911 return (cmd->context & CMD_CONTEXT_CLIENT);
1913 /* NOTREACHED */
1914 assert(1==0);
1915 }
1917 static int handle_request_help (HANDLER_PROTO) /* {{{ */
1918 {
1919 int status;
1920 char *cmd_str;
1921 char *resp_txt;
1922 command_t *help = NULL;
1924 status = buffer_get_field (&buffer, &buffer_size, &cmd_str);
1925 if (status == 0)
1926 help = find_command(cmd_str);
1928 if (help && (help->syntax || help->help))
1929 {
1930 char tmp[CMD_MAX];
1932 snprintf(tmp, sizeof(tmp)-1, "Help for %s\n", help->cmd);
1933 resp_txt = tmp;
1935 if (help->syntax)
1936 add_response_info(sock, "Usage: %s\n", help->syntax);
1938 if (help->help)
1939 add_response_info(sock, "%s\n", help->help);
1940 }
1941 else
1942 {
1943 size_t i;
1945 resp_txt = "Command overview\n";
1947 for (i = 0; i < list_of_commands_len; i++)
1948 {
1949 if (list_of_commands[i].syntax == NULL)
1950 continue;
1951 add_response_info (sock, "%s", list_of_commands[i].syntax);
1952 }
1953 }
1955 return send_response(sock, RESP_OK, resp_txt);
1956 } /* }}} int handle_request_help */
1958 static int handle_request (DISPATCH_PROTO) /* {{{ */
1959 {
1960 char *buffer_ptr = buffer;
1961 char *cmd_str = NULL;
1962 command_t *cmd = NULL;
1963 int status;
1965 assert (buffer[buffer_size - 1] == '\0');
1967 status = buffer_get_field (&buffer_ptr, &buffer_size, &cmd_str);
1968 if (status != 0)
1969 {
1970 RRDD_LOG (LOG_INFO, "handle_request: Unable parse command.");
1971 return (-1);
1972 }
1974 if (sock != NULL && sock->batch_start)
1975 sock->batch_cmd++;
1977 cmd = find_command(cmd_str);
1978 if (!cmd)
1979 return send_response(sock, RESP_ERR, "Unknown command: %s\n", cmd_str);
1981 if (!socket_permission_check (sock, cmd->cmd))
1982 return send_response(sock, RESP_ERR, "Permission denied.\n");
1984 if (!command_check_context(sock, cmd))
1985 return send_response(sock, RESP_ERR, "Can't use '%s' here.\n", cmd_str);
1987 return cmd->handler(cmd, sock, now, buffer_ptr, buffer_size);
1988 } /* }}} int handle_request */
1990 static void journal_set_free (journal_set *js) /* {{{ */
1991 {
1992 if (js == NULL)
1993 return;
1995 rrd_free_ptrs((void ***) &js->files, &js->files_num);
1997 free(js);
1998 } /* }}} journal_set_free */
2000 static void journal_set_remove (journal_set *js) /* {{{ */
2001 {
2002 if (js == NULL)
2003 return;
2005 for (uint i=0; i < js->files_num; i++)
2006 {
2007 RRDD_LOG(LOG_DEBUG, "removing old journal %s", js->files[i]);
2008 unlink(js->files[i]);
2009 }
2010 } /* }}} journal_set_remove */
2012 /* close current journal file handle.
2013 * MUST hold journal_lock before calling */
2014 static void journal_close(void) /* {{{ */
2015 {
2016 if (journal_fh != NULL)
2017 {
2018 if (fclose(journal_fh) != 0)
2019 RRDD_LOG(LOG_ERR, "cannot close journal: %s", rrd_strerror(errno));
2020 }
2022 journal_fh = NULL;
2023 journal_size = 0;
2024 } /* }}} journal_close */
2026 /* MUST hold journal_lock before calling */
2027 static void journal_new_file(void) /* {{{ */
2028 {
2029 struct timeval now;
2030 int new_fd;
2031 char new_file[PATH_MAX + 1];
2033 assert(journal_dir != NULL);
2034 assert(journal_cur != NULL);
2036 journal_close();
2038 gettimeofday(&now, NULL);
2039 /* this format assures that the files sort in strcmp() order */
2040 snprintf(new_file, PATH_MAX, "%s/%s.%010d.%06d",
2041 journal_dir, JOURNAL_BASE, (int)now.tv_sec, (int)now.tv_usec);
2043 new_fd = open(new_file, O_WRONLY|O_CREAT|O_APPEND,
2044 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
2045 if (new_fd < 0)
2046 goto error;
2048 journal_fh = fdopen(new_fd, "a");
2049 if (journal_fh == NULL)
2050 goto error;
2052 journal_size = ftell(journal_fh);
2053 RRDD_LOG(LOG_DEBUG, "started new journal %s", new_file);
2055 /* record the file in the journal set */
2056 rrd_add_strdup(&journal_cur->files, &journal_cur->files_num, new_file);
2058 return;
2060 error:
2061 RRDD_LOG(LOG_CRIT,
2062 "JOURNALING DISABLED: Error while trying to create %s : %s",
2063 new_file, rrd_strerror(errno));
2064 RRDD_LOG(LOG_CRIT,
2065 "JOURNALING DISABLED: All values will be flushed at shutdown");
2067 close(new_fd);
2068 config_flush_at_shutdown = 1;
2070 } /* }}} journal_new_file */
2072 /* MUST NOT hold journal_lock before calling this */
2073 static void journal_rotate(void) /* {{{ */
2074 {
2075 journal_set *old_js = NULL;
2077 if (journal_dir == NULL)
2078 return;
2080 RRDD_LOG(LOG_DEBUG, "rotating journals");
2082 pthread_mutex_lock(&stats_lock);
2083 ++stats_journal_rotate;
2084 pthread_mutex_unlock(&stats_lock);
2086 pthread_mutex_lock(&journal_lock);
2088 journal_close();
2090 /* rotate the journal sets */
2091 old_js = journal_old;
2092 journal_old = journal_cur;
2093 journal_cur = calloc(1, sizeof(journal_set));
2095 if (journal_cur != NULL)
2096 journal_new_file();
2097 else
2098 RRDD_LOG(LOG_CRIT, "journal_rotate: malloc(journal_set) failed\n");
2100 pthread_mutex_unlock(&journal_lock);
2102 journal_set_remove(old_js);
2103 journal_set_free (old_js);
2105 } /* }}} static void journal_rotate */
2107 /* MUST hold journal_lock when calling */
2108 static void journal_done(void) /* {{{ */
2109 {
2110 if (journal_cur == NULL)
2111 return;
2113 journal_close();
2115 if (config_flush_at_shutdown)
2116 {
2117 RRDD_LOG(LOG_INFO, "removing journals");
2118 journal_set_remove(journal_old);
2119 journal_set_remove(journal_cur);
2120 }
2121 else
2122 {
2123 RRDD_LOG(LOG_INFO, "expedited shutdown; "
2124 "journals will be used at next startup");
2125 }
2127 journal_set_free(journal_cur);
2128 journal_set_free(journal_old);
2129 free(journal_dir);
2131 } /* }}} static void journal_done */
2133 static int journal_write(char *cmd, char *args) /* {{{ */
2134 {
2135 int chars;
2137 if (journal_fh == NULL)
2138 return 0;
2140 pthread_mutex_lock(&journal_lock);
2141 chars = fprintf(journal_fh, "%s %s\n", cmd, args);
2142 journal_size += chars;
2144 if (journal_size > JOURNAL_MAX)
2145 journal_new_file();
2147 pthread_mutex_unlock(&journal_lock);
2149 if (chars > 0)
2150 {
2151 pthread_mutex_lock(&stats_lock);
2152 stats_journal_bytes += chars;
2153 pthread_mutex_unlock(&stats_lock);
2154 }
2156 return chars;
2157 } /* }}} static int journal_write */
2159 static int journal_replay (const char *file) /* {{{ */
2160 {
2161 FILE *fh;
2162 int entry_cnt = 0;
2163 int fail_cnt = 0;
2164 uint64_t line = 0;
2165 char entry[CMD_MAX];
2166 time_t now;
2168 if (file == NULL) return 0;
2170 {
2171 char *reason = "unknown error";
2172 int status = 0;
2173 struct stat statbuf;
2175 memset(&statbuf, 0, sizeof(statbuf));
2176 if (stat(file, &statbuf) != 0)
2177 {
2178 reason = "stat error";
2179 status = errno;
2180 }
2181 else if (!S_ISREG(statbuf.st_mode))
2182 {
2183 reason = "not a regular file";
2184 status = EPERM;
2185 }
2186 if (statbuf.st_uid != daemon_uid)
2187 {
2188 reason = "not owned by daemon user";
2189 status = EACCES;
2190 }
2191 if (statbuf.st_mode & (S_IWGRP|S_IWOTH))
2192 {
2193 reason = "must not be user/group writable";
2194 status = EACCES;
2195 }
2197 if (status != 0)
2198 {
2199 RRDD_LOG(LOG_ERR, "journal_replay: %s : %s (%s)",
2200 file, rrd_strerror(status), reason);
2201 return 0;
2202 }
2203 }
2205 fh = fopen(file, "r");
2206 if (fh == NULL)
2207 {
2208 if (errno != ENOENT)
2209 RRDD_LOG(LOG_ERR, "journal_replay: cannot open journal file: '%s' (%s)",
2210 file, rrd_strerror(errno));
2211 return 0;
2212 }
2213 else
2214 RRDD_LOG(LOG_NOTICE, "replaying from journal: %s", file);
2216 now = time(NULL);
2218 while(!feof(fh))
2219 {
2220 size_t entry_len;
2222 ++line;
2223 if (fgets(entry, sizeof(entry), fh) == NULL)
2224 break;
2225 entry_len = strlen(entry);
2227 /* check \n termination in case journal writing crashed mid-line */
2228 if (entry_len == 0)
2229 continue;
2230 else if (entry[entry_len - 1] != '\n')
2231 {
2232 RRDD_LOG(LOG_NOTICE, "Malformed journal entry at line %"PRIu64, line);
2233 ++fail_cnt;
2234 continue;
2235 }
2237 entry[entry_len - 1] = '\0';
2239 if (handle_request(NULL, now, entry, entry_len) == 0)
2240 ++entry_cnt;
2241 else
2242 ++fail_cnt;
2243 }
2245 fclose(fh);
2247 RRDD_LOG(LOG_INFO, "Replayed %d entries (%d failures)",
2248 entry_cnt, fail_cnt);
2250 return entry_cnt > 0 ? 1 : 0;
2251 } /* }}} static int journal_replay */
2253 static int journal_sort(const void *v1, const void *v2)
2254 {
2255 char **jn1 = (char **) v1;
2256 char **jn2 = (char **) v2;
2258 return strcmp(*jn1,*jn2);
2259 }
2261 static void journal_init(void) /* {{{ */
2262 {
2263 int had_journal = 0;
2264 DIR *dir;
2265 struct dirent *dent;
2266 char path[PATH_MAX+1];
2268 if (journal_dir == NULL) return;
2270 pthread_mutex_lock(&journal_lock);
2272 journal_cur = calloc(1, sizeof(journal_set));
2273 if (journal_cur == NULL)
2274 {
2275 RRDD_LOG(LOG_CRIT, "journal_rotate: malloc(journal_set) failed\n");
2276 return;
2277 }
2279 RRDD_LOG(LOG_INFO, "checking for journal files");
2281 /* Handle old journal files during transition. This gives them the
2282 * correct sort order. TODO: remove after first release
2283 */
2284 {
2285 char old_path[PATH_MAX+1];
2286 snprintf(old_path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".old" );
2287 snprintf(path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".0000");
2288 rename(old_path, path);
2290 snprintf(old_path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE );
2291 snprintf(path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".0001");
2292 rename(old_path, path);
2293 }
2295 dir = opendir(journal_dir);
2296 if (!dir) {
2297 RRDD_LOG(LOG_CRIT, "journal_init: opendir(%s) failed\n", journal_dir);
2298 return;
2299 }
2300 while ((dent = readdir(dir)) != NULL)
2301 {
2302 /* looks like a journal file? */
2303 if (strncmp(dent->d_name, JOURNAL_BASE, strlen(JOURNAL_BASE)))
2304 continue;
2306 snprintf(path, PATH_MAX, "%s/%s", journal_dir, dent->d_name);
2308 if (!rrd_add_strdup(&journal_cur->files, &journal_cur->files_num, path))
2309 {
2310 RRDD_LOG(LOG_CRIT, "journal_init: cannot add journal file %s!",
2311 dent->d_name);
2312 break;
2313 }
2314 }
2315 closedir(dir);
2317 qsort(journal_cur->files, journal_cur->files_num,
2318 sizeof(journal_cur->files[0]), journal_sort);
2320 for (uint i=0; i < journal_cur->files_num; i++)
2321 had_journal += journal_replay(journal_cur->files[i]);
2323 journal_new_file();
2325 /* it must have been a crash. start a flush */
2326 if (had_journal && config_flush_at_shutdown)
2327 flush_old_values(-1);
2329 pthread_mutex_unlock(&journal_lock);
2331 RRDD_LOG(LOG_INFO, "journal processing complete");
2333 } /* }}} static void journal_init */
2335 static void free_listen_socket(listen_socket_t *sock) /* {{{ */
2336 {
2337 assert(sock != NULL);
2339 free(sock->rbuf); sock->rbuf = NULL;
2340 free(sock->wbuf); sock->wbuf = NULL;
2341 free(sock);
2342 } /* }}} void free_listen_socket */
2344 static void close_connection(listen_socket_t *sock) /* {{{ */
2345 {
2346 if (sock->fd >= 0)
2347 {
2348 close(sock->fd);
2349 sock->fd = -1;
2350 }
2352 free_listen_socket(sock);
2354 } /* }}} void close_connection */
2356 static void *connection_thread_main (void *args) /* {{{ */
2357 {
2358 listen_socket_t *sock;
2359 int fd;
2361 sock = (listen_socket_t *) args;
2362 fd = sock->fd;
2364 /* init read buffers */
2365 sock->next_read = sock->next_cmd = 0;
2366 sock->rbuf = malloc(RBUF_SIZE);
2367 if (sock->rbuf == NULL)
2368 {
2369 RRDD_LOG(LOG_ERR, "connection_thread_main: cannot malloc read buffer");
2370 close_connection(sock);
2371 return NULL;
2372 }
2374 pthread_mutex_lock (&connection_threads_lock);
2375 connection_threads_num++;
2376 pthread_mutex_unlock (&connection_threads_lock);
2378 while (state == RUNNING)
2379 {
2380 char *cmd;
2381 ssize_t cmd_len;
2382 ssize_t rbytes;
2383 time_t now;
2385 struct pollfd pollfd;
2386 int status;
2388 pollfd.fd = fd;
2389 pollfd.events = POLLIN | POLLPRI;
2390 pollfd.revents = 0;
2392 status = poll (&pollfd, 1, /* timeout = */ 500);
2393 if (state != RUNNING)
2394 break;
2395 else if (status == 0) /* timeout */
2396 continue;
2397 else if (status < 0) /* error */
2398 {
2399 status = errno;
2400 if (status != EINTR)
2401 RRDD_LOG (LOG_ERR, "connection_thread_main: poll(2) failed.");
2402 continue;
2403 }
2405 if ((pollfd.revents & POLLHUP) != 0) /* normal shutdown */
2406 break;
2407 else if ((pollfd.revents & (POLLIN | POLLPRI)) == 0)
2408 {
2409 RRDD_LOG (LOG_WARNING, "connection_thread_main: "
2410 "poll(2) returned something unexpected: %#04hx",
2411 pollfd.revents);
2412 break;
2413 }
2415 rbytes = read(fd, sock->rbuf + sock->next_read,
2416 RBUF_SIZE - sock->next_read);
2417 if (rbytes < 0)
2418 {
2419 RRDD_LOG(LOG_ERR, "connection_thread_main: read() failed.");
2420 break;
2421 }
2422 else if (rbytes == 0)
2423 break; /* eof */
2425 sock->next_read += rbytes;
2427 if (sock->batch_start)
2428 now = sock->batch_start;
2429 else
2430 now = time(NULL);
2432 while ((cmd = next_cmd(sock, &cmd_len)) != NULL)
2433 {
2434 status = handle_request (sock, now, cmd, cmd_len+1);
2435 if (status != 0)
2436 goto out_close;
2437 }
2438 }
2440 out_close:
2441 close_connection(sock);
2443 /* Remove this thread from the connection threads list */
2444 pthread_mutex_lock (&connection_threads_lock);
2445 connection_threads_num--;
2446 if (connection_threads_num <= 0)
2447 pthread_cond_broadcast(&connection_threads_done);
2448 pthread_mutex_unlock (&connection_threads_lock);
2450 return (NULL);
2451 } /* }}} void *connection_thread_main */
2453 static int open_listen_socket_unix (const listen_socket_t *sock) /* {{{ */
2454 {
2455 int fd;
2456 struct sockaddr_un sa;
2457 listen_socket_t *temp;
2458 int status;
2459 const char *path;
2460 char *path_copy, *dir;
2462 path = sock->addr;
2463 if (strncmp(path, "unix:", strlen("unix:")) == 0)
2464 path += strlen("unix:");
2466 /* dirname may modify its argument */
2467 path_copy = strdup(path);
2468 if (path_copy == NULL)
2469 {
2470 fprintf(stderr, "rrdcached: strdup(): %s\n",
2471 rrd_strerror(errno));
2472 return (-1);
2473 }
2475 dir = dirname(path_copy);
2476 if (rrd_mkdir_p(dir, 0777) != 0)
2477 {
2478 fprintf(stderr, "Failed to create socket directory '%s': %s\n",
2479 dir, rrd_strerror(errno));
2480 return (-1);
2481 }
2483 free(path_copy);
2485 temp = (listen_socket_t *) rrd_realloc (listen_fds,
2486 sizeof (listen_fds[0]) * (listen_fds_num + 1));
2487 if (temp == NULL)
2488 {
2489 fprintf (stderr, "rrdcached: open_listen_socket_unix: realloc failed.\n");
2490 return (-1);
2491 }
2492 listen_fds = temp;
2493 memcpy (listen_fds + listen_fds_num, sock, sizeof (listen_fds[0]));
2495 fd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
2496 if (fd < 0)
2497 {
2498 fprintf (stderr, "rrdcached: unix socket(2) failed: %s\n",
2499 rrd_strerror(errno));
2500 return (-1);
2501 }
2503 memset (&sa, 0, sizeof (sa));
2504 sa.sun_family = AF_UNIX;
2505 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
2507 /* if we've gotten this far, we own the pid file. any daemon started
2508 * with the same args must not be alive. therefore, ensure that we can
2509 * create the socket...
2510 */
2511 unlink(path);
2513 status = bind (fd, (struct sockaddr *) &sa, sizeof (sa));
2514 if (status != 0)
2515 {
2516 fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
2517 path, rrd_strerror(errno));
2518 close (fd);
2519 return (-1);
2520 }
2522 /* tweak the sockets group ownership */
2523 if (sock->socket_group != (gid_t)-1)
2524 {
2525 if ( (chown(path, getuid(), sock->socket_group) != 0) ||
2526 (chmod(path, (S_IRUSR|S_IWUSR|S_IXUSR | S_IRGRP|S_IWGRP)) != 0) )
2527 {
2528 fprintf(stderr, "rrdcached: failed to set socket group permissions (%s)\n", strerror(errno));
2529 }
2530 }
2532 if (sock->socket_permissions != (mode_t)-1)
2533 {
2534 if (chmod(path, sock->socket_permissions) != 0)
2535 fprintf(stderr, "rrdcached: failed to set socket file permissions (%o): %s\n",
2536 (unsigned int)sock->socket_permissions, strerror(errno));
2537 }
2539 status = listen (fd, /* backlog = */ 10);
2540 if (status != 0)
2541 {
2542 fprintf (stderr, "rrdcached: listen(%s) failed: %s.\n",
2543 path, rrd_strerror(errno));
2544 close (fd);
2545 unlink (path);
2546 return (-1);
2547 }
2549 listen_fds[listen_fds_num].fd = fd;
2550 listen_fds[listen_fds_num].family = PF_UNIX;
2551 strncpy(listen_fds[listen_fds_num].addr, path,
2552 sizeof (listen_fds[listen_fds_num].addr) - 1);
2553 listen_fds_num++;
2555 return (0);
2556 } /* }}} int open_listen_socket_unix */
2558 static int open_listen_socket_network(const listen_socket_t *sock) /* {{{ */
2559 {
2560 struct addrinfo ai_hints;
2561 struct addrinfo *ai_res;
2562 struct addrinfo *ai_ptr;
2563 char addr_copy[NI_MAXHOST];
2564 char *addr;
2565 char *port;
2566 int status;
2568 strncpy (addr_copy, sock->addr, sizeof(addr_copy)-1);
2569 addr_copy[sizeof (addr_copy) - 1] = 0;
2570 addr = addr_copy;
2572 memset (&ai_hints, 0, sizeof (ai_hints));
2573 ai_hints.ai_flags = 0;
2574 #ifdef AI_ADDRCONFIG
2575 ai_hints.ai_flags |= AI_ADDRCONFIG;
2576 #endif
2577 ai_hints.ai_family = AF_UNSPEC;
2578 ai_hints.ai_socktype = SOCK_STREAM;
2580 port = NULL;
2581 if (*addr == '[') /* IPv6+port format */
2582 {
2583 /* `addr' is something like "[2001:780:104:2:211:24ff:feab:26f8]:12345" */
2584 addr++;
2586 port = strchr (addr, ']');
2587 if (port == NULL)
2588 {
2589 fprintf (stderr, "rrdcached: Malformed address: %s\n", sock->addr);
2590 return (-1);
2591 }
2592 *port = 0;
2593 port++;
2595 if (*port == ':')
2596 port++;
2597 else if (*port == 0)
2598 port = NULL;
2599 else
2600 {
2601 fprintf (stderr, "rrdcached: Garbage after address: %s\n", port);
2602 return (-1);
2603 }
2604 } /* if (*addr == '[') */
2605 else
2606 {
2607 port = rindex(addr, ':');
2608 if (port != NULL)
2609 {
2610 *port = 0;
2611 port++;
2612 }
2613 }
2614 ai_res = NULL;
2615 status = getaddrinfo (addr,
2616 port == NULL ? RRDCACHED_DEFAULT_PORT : port,
2617 &ai_hints, &ai_res);
2618 if (status != 0)
2619 {
2620 fprintf (stderr, "rrdcached: getaddrinfo(%s) failed: %s\n",
2621 addr, gai_strerror (status));
2622 return (-1);
2623 }
2625 for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2626 {
2627 int fd;
2628 listen_socket_t *temp;
2629 int one = 1;
2631 temp = (listen_socket_t *) rrd_realloc (listen_fds,
2632 sizeof (listen_fds[0]) * (listen_fds_num + 1));
2633 if (temp == NULL)
2634 {
2635 fprintf (stderr,
2636 "rrdcached: open_listen_socket_network: realloc failed.\n");
2637 continue;
2638 }
2639 listen_fds = temp;
2640 memcpy (listen_fds + listen_fds_num, sock, sizeof (listen_fds[0]));
2642 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
2643 if (fd < 0)
2644 {
2645 fprintf (stderr, "rrdcached: network socket(2) failed: %s.\n",
2646 rrd_strerror(errno));
2647 continue;
2648 }
2650 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
2652 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2653 if (status != 0)
2654 {
2655 fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
2656 sock->addr, rrd_strerror(errno));
2657 close (fd);
2658 continue;
2659 }
2661 status = listen (fd, /* backlog = */ 10);
2662 if (status != 0)
2663 {
2664 fprintf (stderr, "rrdcached: listen(%s) failed: %s\n.",
2665 sock->addr, rrd_strerror(errno));
2666 close (fd);
2667 freeaddrinfo(ai_res);
2668 return (-1);
2669 }
2671 listen_fds[listen_fds_num].fd = fd;
2672 listen_fds[listen_fds_num].family = ai_ptr->ai_family;
2673 listen_fds_num++;
2674 } /* for (ai_ptr) */
2676 freeaddrinfo(ai_res);
2677 return (0);
2678 } /* }}} static int open_listen_socket_network */
2680 static int open_listen_socket (const listen_socket_t *sock) /* {{{ */
2681 {
2682 assert(sock != NULL);
2683 assert(sock->addr != NULL);
2685 if (strncmp ("unix:", sock->addr, strlen ("unix:")) == 0
2686 || sock->addr[0] == '/')
2687 return (open_listen_socket_unix(sock));
2688 else
2689 return (open_listen_socket_network(sock));
2690 } /* }}} int open_listen_socket */
2692 static int close_listen_sockets (void) /* {{{ */
2693 {
2694 size_t i;
2696 for (i = 0; i < listen_fds_num; i++)
2697 {
2698 close (listen_fds[i].fd);
2700 if (listen_fds[i].family == PF_UNIX)
2701 unlink(listen_fds[i].addr);
2702 }
2704 free (listen_fds);
2705 listen_fds = NULL;
2706 listen_fds_num = 0;
2708 return (0);
2709 } /* }}} int close_listen_sockets */
2711 static void *listen_thread_main (void UNUSED(*args)) /* {{{ */
2712 {
2713 struct pollfd *pollfds;
2714 int pollfds_num;
2715 int status;
2716 int i;
2718 if (listen_fds_num < 1)
2719 {
2720 RRDD_LOG(LOG_ERR, "listen_thread_main: no listen_fds !");
2721 return (NULL);
2722 }
2724 pollfds_num = listen_fds_num;
2725 pollfds = (struct pollfd *) malloc (sizeof (*pollfds) * pollfds_num);
2726 if (pollfds == NULL)
2727 {
2728 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
2729 return (NULL);
2730 }
2731 memset (pollfds, 0, sizeof (*pollfds) * pollfds_num);
2733 RRDD_LOG(LOG_INFO, "listening for connections");
2735 while (state == RUNNING)
2736 {
2737 for (i = 0; i < pollfds_num; i++)
2738 {
2739 pollfds[i].fd = listen_fds[i].fd;
2740 pollfds[i].events = POLLIN | POLLPRI;
2741 pollfds[i].revents = 0;
2742 }
2744 status = poll (pollfds, pollfds_num, /* timeout = */ 1000);
2745 if (state != RUNNING)
2746 break;
2747 else if (status == 0) /* timeout */
2748 continue;
2749 else if (status < 0) /* error */
2750 {
2751 status = errno;
2752 if (status != EINTR)
2753 {
2754 RRDD_LOG (LOG_ERR, "listen_thread_main: poll(2) failed.");
2755 }
2756 continue;
2757 }
2759 for (i = 0; i < pollfds_num; i++)
2760 {
2761 listen_socket_t *client_sock;
2762 struct sockaddr_storage client_sa;
2763 socklen_t client_sa_size;
2764 pthread_t tid;
2765 pthread_attr_t attr;
2767 if (pollfds[i].revents == 0)
2768 continue;
2770 if ((pollfds[i].revents & (POLLIN | POLLPRI)) == 0)
2771 {
2772 RRDD_LOG (LOG_ERR, "listen_thread_main: "
2773 "poll(2) returned something unexpected for listen FD #%i.",
2774 pollfds[i].fd);
2775 continue;
2776 }
2778 client_sock = (listen_socket_t *) malloc (sizeof (listen_socket_t));
2779 if (client_sock == NULL)
2780 {
2781 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
2782 continue;
2783 }
2784 memcpy(client_sock, &listen_fds[i], sizeof(listen_fds[0]));
2786 client_sa_size = sizeof (client_sa);
2787 client_sock->fd = accept (pollfds[i].fd,
2788 (struct sockaddr *) &client_sa, &client_sa_size);
2789 if (client_sock->fd < 0)
2790 {
2791 RRDD_LOG (LOG_ERR, "listen_thread_main: accept(2) failed.");
2792 free(client_sock);
2793 continue;
2794 }
2796 pthread_attr_init (&attr);
2797 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
2799 status = pthread_create (&tid, &attr, connection_thread_main,
2800 client_sock);
2801 if (status != 0)
2802 {
2803 RRDD_LOG (LOG_ERR, "listen_thread_main: pthread_create failed.");
2804 close_connection(client_sock);
2805 continue;
2806 }
2807 } /* for (pollfds_num) */
2808 } /* while (state == RUNNING) */
2810 RRDD_LOG(LOG_INFO, "starting shutdown");
2812 close_listen_sockets ();
2814 pthread_mutex_lock (&connection_threads_lock);
2815 while (connection_threads_num > 0)
2816 pthread_cond_wait(&connection_threads_done, &connection_threads_lock);
2817 pthread_mutex_unlock (&connection_threads_lock);
2819 free(pollfds);
2821 return (NULL);
2822 } /* }}} void *listen_thread_main */
2824 static int daemonize (void) /* {{{ */
2825 {
2826 int pid_fd;
2827 char *base_dir;
2829 daemon_uid = geteuid();
2831 pid_fd = open_pidfile("create", O_CREAT|O_EXCL|O_WRONLY);
2832 if (pid_fd < 0)
2833 pid_fd = check_pidfile();
2834 if (pid_fd < 0)
2835 return pid_fd;
2837 /* open all the listen sockets */
2838 if (config_listen_address_list_len > 0)
2839 {
2840 for (size_t i = 0; i < config_listen_address_list_len; i++)
2841 open_listen_socket (config_listen_address_list[i]);
2843 rrd_free_ptrs((void ***) &config_listen_address_list,
2844 &config_listen_address_list_len);
2845 }
2846 else
2847 {
2848 listen_socket_t sock;
2849 memset(&sock, 0, sizeof(sock));
2850 strncpy(sock.addr, RRDCACHED_DEFAULT_ADDRESS, sizeof(sock.addr)-1);
2851 open_listen_socket (&sock);
2852 }
2854 if (listen_fds_num < 1)
2855 {
2856 fprintf (stderr, "rrdcached: FATAL: cannot open any listen sockets\n");
2857 goto error;
2858 }
2860 if (!stay_foreground)
2861 {
2862 pid_t child;
2864 child = fork ();
2865 if (child < 0)
2866 {
2867 fprintf (stderr, "daemonize: fork(2) failed.\n");
2868 goto error;
2869 }
2870 else if (child > 0)
2871 exit(0);
2873 /* Become session leader */
2874 setsid ();
2876 /* Open the first three file descriptors to /dev/null */
2877 close (2);
2878 close (1);
2879 close (0);
2881 open ("/dev/null", O_RDWR);
2882 if (dup(0) == -1 || dup(0) == -1){
2883 RRDD_LOG (LOG_ERR, "faild to run dup.\n");
2884 }
2885 } /* if (!stay_foreground) */
2887 /* Change into the /tmp directory. */
2888 base_dir = (config_base_dir != NULL)
2889 ? config_base_dir
2890 : "/tmp";
2892 if (chdir (base_dir) != 0)
2893 {
2894 fprintf (stderr, "daemonize: chdir (%s) failed.\n", base_dir);
2895 goto error;
2896 }
2898 install_signal_handlers();
2900 openlog ("rrdcached", LOG_PID, LOG_DAEMON);
2901 RRDD_LOG(LOG_INFO, "starting up");
2903 cache_tree = g_tree_new_full ((GCompareDataFunc) strcmp, NULL, NULL,
2904 (GDestroyNotify) free_cache_item);
2905 if (cache_tree == NULL)
2906 {
2907 RRDD_LOG (LOG_ERR, "daemonize: g_tree_new failed.");
2908 goto error;
2909 }
2911 return write_pidfile (pid_fd);
2913 error:
2914 remove_pidfile();
2915 return -1;
2916 } /* }}} int daemonize */
2918 static int cleanup (void) /* {{{ */
2919 {
2920 pthread_cond_broadcast (&flush_cond);
2921 pthread_join (flush_thread, NULL);
2923 pthread_cond_broadcast (&queue_cond);
2924 for (int i = 0; i < config_queue_threads; i++)
2925 pthread_join (queue_threads[i], NULL);
2927 if (config_flush_at_shutdown)
2928 {
2929 assert(cache_queue_head == NULL);
2930 RRDD_LOG(LOG_INFO, "clean shutdown; all RRDs flushed");
2931 }
2933 free(queue_threads);
2934 free(config_base_dir);
2936 pthread_mutex_lock(&cache_lock);
2937 g_tree_destroy(cache_tree);
2939 pthread_mutex_lock(&journal_lock);
2940 journal_done();
2942 RRDD_LOG(LOG_INFO, "goodbye");
2943 closelog ();
2945 remove_pidfile ();
2946 free(config_pid_file);
2948 return (0);
2949 } /* }}} int cleanup */
2951 static int read_options (int argc, char **argv) /* {{{ */
2952 {
2953 int option;
2954 int status = 0;
2956 char **permissions = NULL;
2957 size_t permissions_len = 0;
2959 gid_t socket_group = (gid_t)-1;
2960 mode_t socket_permissions = (mode_t)-1;
2962 while ((option = getopt(argc, argv, "gl:s:m:P:f:w:z:t:Bb:p:Fj:a:h?")) != -1)
2963 {
2964 switch (option)
2965 {
2966 case 'g':
2967 stay_foreground=1;
2968 break;
2970 case 'l':
2971 {
2972 listen_socket_t *new;
2974 new = malloc(sizeof(listen_socket_t));
2975 if (new == NULL)
2976 {
2977 fprintf(stderr, "read_options: malloc failed.\n");
2978 return(2);
2979 }
2980 memset(new, 0, sizeof(listen_socket_t));
2982 strncpy(new->addr, optarg, sizeof(new->addr)-1);
2984 /* Add permissions to the socket {{{ */
2985 if (permissions_len != 0)
2986 {
2987 size_t i;
2988 for (i = 0; i < permissions_len; i++)
2989 {
2990 status = socket_permission_add (new, permissions[i]);
2991 if (status != 0)
2992 {
2993 fprintf (stderr, "read_options: Adding permission \"%s\" to "
2994 "socket failed. Most likely, this permission doesn't "
2995 "exist. Check your command line.\n", permissions[i]);
2996 status = 4;
2997 }
2998 }
2999 }
3000 else /* if (permissions_len == 0) */
3001 {
3002 /* Add permission for ALL commands to the socket. */
3003 size_t i;
3004 for (i = 0; i < list_of_commands_len; i++)
3005 {
3006 status = socket_permission_add (new, list_of_commands[i].cmd);
3007 if (status != 0)
3008 {
3009 fprintf (stderr, "read_options: Adding permission \"%s\" to "
3010 "socket failed. This should never happen, ever! Sorry.\n",
3011 permissions[i]);
3012 status = 4;
3013 }
3014 }
3015 }
3016 /* }}} Done adding permissions. */
3018 new->socket_group = socket_group;
3019 new->socket_permissions = socket_permissions;
3021 if (!rrd_add_ptr((void ***)&config_listen_address_list,
3022 &config_listen_address_list_len, new))
3023 {
3024 fprintf(stderr, "read_options: rrd_add_ptr failed.\n");
3025 return (2);
3026 }
3027 }
3028 break;
3030 /* set socket group permissions */
3031 case 's':
3032 {
3033 gid_t group_gid;
3034 struct group *grp;
3036 group_gid = strtoul(optarg, NULL, 10);
3037 if (errno != EINVAL && group_gid>0)
3038 {
3039 /* we were passed a number */
3040 grp = getgrgid(group_gid);
3041 }
3042 else
3043 {
3044 grp = getgrnam(optarg);
3045 }
3047 if (grp)
3048 {
3049 socket_group = grp->gr_gid;
3050 }
3051 else
3052 {
3053 /* no idea what the user wanted... */
3054 fprintf (stderr, "read_options: couldn't map \"%s\" to a group, Sorry\n", optarg);
3055 return (5);
3056 }
3057 }
3058 break;
3060 /* set socket file permissions */
3061 case 'm':
3062 {
3063 long tmp;
3064 char *endptr = NULL;
3066 tmp = strtol (optarg, &endptr, 8);
3067 if ((endptr == optarg) || (! endptr) || (*endptr != '\0')
3068 || (tmp > 07777) || (tmp < 0)) {
3069 fprintf (stderr, "read_options: Invalid file mode \"%s\".\n",
3070 optarg);
3071 return (5);
3072 }
3074 socket_permissions = (mode_t)tmp;
3075 }
3076 break;
3078 case 'P':
3079 {
3080 char *optcopy;
3081 char *saveptr;
3082 char *dummy;
3083 char *ptr;
3085 rrd_free_ptrs ((void *) &permissions, &permissions_len);
3087 optcopy = strdup (optarg);
3088 dummy = optcopy;
3089 saveptr = NULL;
3090 while ((ptr = strtok_r (dummy, ", ", &saveptr)) != NULL)
3091 {
3092 dummy = NULL;
3093 rrd_add_strdup ((void *) &permissions, &permissions_len, ptr);
3094 }
3096 free (optcopy);
3097 }
3098 break;
3100 case 'f':
3101 {
3102 int temp;
3104 temp = atoi (optarg);
3105 if (temp > 0)
3106 config_flush_interval = temp;
3107 else
3108 {
3109 fprintf (stderr, "Invalid flush interval: %s\n", optarg);
3110 status = 3;
3111 }
3112 }
3113 break;
3115 case 'w':
3116 {
3117 int temp;
3119 temp = atoi (optarg);
3120 if (temp > 0)
3121 config_write_interval = temp;
3122 else
3123 {
3124 fprintf (stderr, "Invalid write interval: %s\n", optarg);
3125 status = 2;
3126 }
3127 }
3128 break;
3130 case 'z':
3131 {
3132 int temp;
3134 temp = atoi(optarg);
3135 if (temp > 0)
3136 config_write_jitter = temp;
3137 else
3138 {
3139 fprintf (stderr, "Invalid write jitter: -z %s\n", optarg);
3140 status = 2;
3141 }
3143 break;
3144 }
3146 case 't':
3147 {
3148 int threads;
3149 threads = atoi(optarg);
3150 if (threads >= 1)
3151 config_queue_threads = threads;
3152 else
3153 {
3154 fprintf (stderr, "Invalid thread count: -t %s\n", optarg);
3155 return 1;
3156 }
3157 }
3158 break;
3160 case 'B':
3161 config_write_base_only = 1;
3162 break;
3164 case 'b':
3165 {
3166 size_t len;
3167 char base_realpath[PATH_MAX];
3169 if (config_base_dir != NULL)
3170 free (config_base_dir);
3171 config_base_dir = strdup (optarg);
3172 if (config_base_dir == NULL)
3173 {
3174 fprintf (stderr, "read_options: strdup failed.\n");
3175 return (3);
3176 }
3178 if (rrd_mkdir_p (config_base_dir, 0777) != 0)
3179 {
3180 fprintf (stderr, "Failed to create base directory '%s': %s\n",
3181 config_base_dir, rrd_strerror (errno));
3182 return (3);
3183 }
3185 /* make sure that the base directory is not resolved via
3186 * symbolic links. this makes some performance-enhancing
3187 * assumptions possible (we don't have to resolve paths
3188 * that start with a "/")
3189 */
3190 if (realpath(config_base_dir, base_realpath) == NULL)
3191 {
3192 fprintf (stderr, "Failed to canonicalize the base directory '%s': "
3193 "%s\n", config_base_dir, rrd_strerror(errno));
3194 return 5;
3195 }
3197 len = strlen (config_base_dir);
3198 while ((len > 0) && (config_base_dir[len - 1] == '/'))
3199 {
3200 config_base_dir[len - 1] = 0;
3201 len--;
3202 }
3204 if (len < 1)
3205 {
3206 fprintf (stderr, "Invalid base directory: %s\n", optarg);
3207 return (4);
3208 }
3210 _config_base_dir_len = len;
3212 len = strlen (base_realpath);
3213 while ((len > 0) && (base_realpath[len - 1] == '/'))
3214 {
3215 base_realpath[len - 1] = '\0';
3216 len--;
3217 }
3219 if (strncmp(config_base_dir,
3220 base_realpath, sizeof(base_realpath)) != 0)
3221 {
3222 fprintf(stderr,
3223 "Base directory (-b) resolved via file system links!\n"
3224 "Please consult rrdcached '-b' documentation!\n"
3225 "Consider specifying the real directory (%s)\n",
3226 base_realpath);
3227 return 5;
3228 }
3229 }
3230 break;
3232 case 'p':
3233 {
3234 if (config_pid_file != NULL)
3235 free (config_pid_file);
3236 config_pid_file = strdup (optarg);
3237 if (config_pid_file == NULL)
3238 {
3239 fprintf (stderr, "read_options: strdup failed.\n");
3240 return (3);
3241 }
3242 }
3243 break;
3245 case 'F':
3246 config_flush_at_shutdown = 1;
3247 break;
3249 case 'j':
3250 {
3251 char journal_dir_actual[PATH_MAX];
3252 const char *dir;
3253 dir = journal_dir = strdup(realpath((const char *)optarg, journal_dir_actual));
3255 status = rrd_mkdir_p(dir, 0777);
3256 if (status != 0)
3257 {
3258 fprintf(stderr, "Failed to create journal directory '%s': %s\n",
3259 dir, rrd_strerror(errno));
3260 return 6;
3261 }
3263 if (access(dir, R_OK|W_OK|X_OK) != 0)
3264 {
3265 fprintf(stderr, "Must specify a writable directory with -j! (%s)\n",
3266 errno ? rrd_strerror(errno) : "");
3267 return 6;
3268 }
3269 }
3270 break;
3272 case 'a':
3273 {
3274 int temp = atoi(optarg);
3275 if (temp > 0)
3276 config_alloc_chunk = temp;
3277 else
3278 {
3279 fprintf(stderr, "Invalid allocation size: %s\n", optarg);
3280 return 10;
3281 }
3282 }
3283 break;
3285 case 'h':
3286 case '?':
3287 printf ("RRDCacheD %s\n"
3288 "Copyright (C) 2008,2009 Florian octo Forster and Kevin Brintnall\n"
3289 "\n"
3290 "Usage: rrdcached [options]\n"
3291 "\n"
3292 "Valid options are:\n"
3293 " -l <address> Socket address to listen to.\n"
3294 " -P <perms> Sets the permissions to assign to all following "
3295 "sockets\n"
3296 " -w <seconds> Interval in which to write data.\n"
3297 " -z <delay> Delay writes up to <delay> seconds to spread load\n"
3298 " -t <threads> Number of write threads.\n"
3299 " -f <seconds> Interval in which to flush dead data.\n"
3300 " -p <file> Location of the PID-file.\n"
3301 " -b <dir> Base directory to change to.\n"
3302 " -B Restrict file access to paths within -b <dir>\n"
3303 " -g Do not fork and run in the foreground.\n"
3304 " -j <dir> Directory in which to create the journal files.\n"
3305 " -F Always flush all updates at shutdown\n"
3306 " -s <id|name> Group owner of all following UNIX sockets\n"
3307 " (the socket will also have read/write permissions "
3308 "for that group)\n"
3309 " -m <mode> File permissions (octal) of all following UNIX "
3310 "sockets\n"
3311 " -a <size> Memory allocation chunk size. Default is 1."
3312 "\n"
3313 "For more information and a detailed description of all options "
3314 "please refer\n"
3315 "to the rrdcached(1) manual page.\n",
3316 VERSION);
3317 if (option == 'h')
3318 status = -1;
3319 else
3320 status = 1;
3321 break;
3322 } /* switch (option) */
3323 } /* while (getopt) */
3325 /* advise the user when values are not sane */
3326 if (config_flush_interval < 2 * config_write_interval)
3327 fprintf(stderr, "WARNING: flush interval (-f) should be at least"
3328 " 2x write interval (-w) !\n");
3329 if (config_write_jitter > config_write_interval)
3330 fprintf(stderr, "WARNING: write delay (-z) should NOT be larger than"
3331 " write interval (-w) !\n");
3333 if (config_write_base_only && config_base_dir == NULL)
3334 fprintf(stderr, "WARNING: -B does not make sense without -b!\n"
3335 " Consult the rrdcached documentation\n");
3337 if (journal_dir == NULL)
3338 config_flush_at_shutdown = 1;
3340 rrd_free_ptrs ((void *) &permissions, &permissions_len);
3342 return (status);
3343 } /* }}} int read_options */
3345 int main (int argc, char **argv)
3346 {
3347 int status;
3349 status = read_options (argc, argv);
3350 if (status != 0)
3351 {
3352 if (status < 0)
3353 status = 0;
3354 return (status);
3355 }
3357 status = daemonize ();
3358 if (status != 0)
3359 {
3360 fprintf (stderr, "rrdcached: daemonize failed, exiting.\n");
3361 return (1);
3362 }
3364 journal_init();
3366 /* start the queue threads */
3367 queue_threads = calloc(config_queue_threads, sizeof(*queue_threads));
3368 if (queue_threads == NULL)
3369 {
3370 RRDD_LOG (LOG_ERR, "FATAL: cannot calloc queue threads");
3371 cleanup();
3372 return (1);
3373 }
3374 for (int i = 0; i < config_queue_threads; i++)
3375 {
3376 memset (&queue_threads[i], 0, sizeof (*queue_threads));
3377 status = pthread_create (&queue_threads[i], NULL, queue_thread_main, NULL);
3378 if (status != 0)
3379 {
3380 RRDD_LOG (LOG_ERR, "FATAL: cannot create queue thread");
3381 cleanup();
3382 return (1);
3383 }
3384 }
3386 /* start the flush thread */
3387 memset(&flush_thread, 0, sizeof(flush_thread));
3388 status = pthread_create (&flush_thread, NULL, flush_thread_main, NULL);
3389 if (status != 0)
3390 {
3391 RRDD_LOG (LOG_ERR, "FATAL: cannot create flush thread");
3392 cleanup();
3393 return (1);
3394 }
3396 listen_thread_main (NULL);
3397 cleanup ();
3399 return (0);
3400 } /* int main */
3402 /*
3403 * vim: set sw=2 sts=2 ts=8 et fdm=marker :
3404 */