1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 1999-2000 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 /*
28 * Postprocessor for NFS server logging.
29 */
30 #include <arpa/inet.h>
31 #include <assert.h>
32 #include <deflt.h>
33 #include <errno.h>
34 #include <fcntl.h>
35 #include <netinet/in.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <strings.h>
40 #include <signal.h>
41 #include <syslog.h>
42 #include <limits.h>
43 #include <libintl.h>
44 #include <locale.h>
45 #include <unistd.h>
46 #include <sys/types.h>
47 #include <sys/utsname.h>
48 #include <sys/stat.h>
49 #include <sys/resource.h>
50 #include <rpc/clnt_stat.h>
51 #include <nfs/nfs.h>
52 #include <nfs/export.h>
53 #include <nfs/nfs_log.h>
54 #include "fhtab.h"
55 #include "nfslogd.h"
56 #include "buffer_list.h"
57 #include "../lib/nfslog_config.h"
58 #include "../lib/nfslogtab.h"
59
60 enum pidfile_operation {
61 PID_STARTUP, PID_SHUTDOWN
62 };
63
64 static int nfslogtab_deactivate_after_boot(void);
65 static int
66 nfslogtab_remove(struct buffer_ent **, struct buffer_ent **, boolean_t);
67 static int cycle_logs(nfsl_config_t *, int);
68 static void enable_logcycling(void);
69 static int process_pidfile(enum pidfile_operation);
70 static void short_cleanup(void);
71 static void full_cleanup(void);
72 static void transactions_timeout(nfsl_config_t *);
73 static void close_all_translogs(nfsl_config_t *);
74 int cycle_log(char *, int);
75 static boolean_t is_cycle_needed(char *, void **, boolean_t, int *);
76
77 /*
78 * Configuration information.
79 */
80
81 int debug = 0;
82 boolean_t test = B_FALSE;
83 time_t mapping_update_interval = MAPPING_UPDATE_INTERVAL;
84 /* prune_timeout measures how old a database entry must be to be pruned */
85 time_t prune_timeout = (SECSPERHOUR * 7 * 24);
86 int max_logs_preserve = MAX_LOGS_PRESERVE;
87 uint_t idle_time = IDLE_TIME;
88 static mode_t Umask = NFSLOG_UMASK;
89 static long cycle_frequency = CYCLE_FREQUENCY;
90 /* prune_frequency measures how often should prune_dbs be called */
91 static long prune_frequency = (SECSPERHOUR * 24);
92 static int min_size = MIN_PROCESSING_SIZE;
93 static volatile bool_t need2cycle = FALSE;
94 static volatile bool_t need2prune = FALSE;
95 boolean_t keep_running = B_TRUE;
96 boolean_t quick_cleaning = B_FALSE;
97
98 /*ARGSUSED*/
99 int
main(int argc,char ** argv)100 main(int argc, char **argv)
101 {
102 struct rlimit rl;
103 int error = 0;
104 char *defp;
105 pid_t pid;
106
107 timestruc_t logtab_update;
108 time_t process_start, last_prune = time(0);
109 time_t last_cycle = time(0); /* last time logs were cycled */
110 int processed, buffers_processed;
111 struct buffer_ent *buffer_list = NULL, *bep, *next;
112 nfsl_config_t *config_list = NULL;
113 char *fhtable_to_prune = NULL;
114
115 /*
116 * Check to make sure user is root.
117 */
118 if (geteuid() != 0) {
119 (void) fprintf(stderr, gettext("%s must be run as root\n"),
120 argv[0]);
121 exit(1);
122 }
123
124 /*
125 * Read defaults file.
126 */
127 if (defopen(NFSLOG_OPTIONS_FILE) == 0) {
128 if ((defp = defread("DEBUG=")) != NULL) {
129 debug = atoi(defp);
130 if (debug > 0)
131 (void) printf("debug=%d\n", debug);
132 }
133 if ((defp = defread("TEST=")) != NULL) {
134 if (strcmp(defp, "TRUE") == 0)
135 test = B_TRUE;
136 if (debug > 0) {
137 if (test)
138 (void) printf("test=TRUE\n");
139 else
140 (void) printf("test=FALSE\n");
141 }
142 }
143 /*
144 * Set Umask for log and fhtable creation.
145 */
146 if ((defp = defread("UMASK=")) != NULL) {
147 if (sscanf(defp, "%lo", &Umask) != 1)
148 Umask = NFSLOG_UMASK;
149 }
150 /*
151 * Minimum size buffer should reach before processing.
152 */
153 if ((defp = defread("MIN_PROCESSING_SIZE=")) != NULL) {
154 min_size = atoi(defp);
155 if (debug > 0)
156 (void) printf("min_size=%d\n", min_size);
157 }
158 /*
159 * Number of seconds the daemon should
160 * sleep waiting for more work.
161 */
162 if ((defp = defread("IDLE_TIME=")) != NULL) {
163 idle_time = (uint_t)atoi(defp);
164 if (debug > 0)
165 (void) printf("idle_time=%d\n", idle_time);
166 }
167 /*
168 * Maximum number of logs to preserve.
169 */
170 if ((defp = defread("MAX_LOGS_PRESERVE=")) != NULL) {
171 max_logs_preserve = atoi(defp);
172 if (debug > 0) {
173 (void) printf("max_logs_preserve=%d\n",
174 max_logs_preserve);
175 }
176 }
177 /*
178 * Frequency of atime updates.
179 */
180 if ((defp = defread("MAPPING_UPDATE_INTERVAL=")) != NULL) {
181 mapping_update_interval = atoi(defp);
182 if (debug > 0) {
183 (void) printf("mapping_update_interval=%ld\n",
184 mapping_update_interval);
185 }
186 }
187 /*
188 * Time to remove entries
189 */
190 if ((defp = defread("PRUNE_TIMEOUT=")) != NULL) {
191 /*
192 * Prune timeout is in hours but we want
193 * deal with the time in seconds internally.
194 */
195 prune_timeout = atoi(defp);
196 prune_timeout *= SECSPERHOUR;
197 if (prune_timeout < prune_frequency)
198 prune_frequency = prune_timeout;
199 if (debug > 0) {
200 (void) printf("prune_timeout=%ld\n",
201 prune_timeout);
202 }
203 }
204 /*
205 * fhtable to prune when start (for debug/test purposes)
206 */
207 if ((defp = defread("PRUNE_FHTABLE=")) != NULL) {
208 /*
209 * Specify full pathname of fhtable to prune before
210 * any processing is to be done
211 */
212 if (fhtable_to_prune = malloc(strlen(defp) + 1)) {
213 (void) strcpy(fhtable_to_prune, defp);
214 if (debug > 0) {
215 (void) printf("fhtable to prune=%s\n",
216 fhtable_to_prune);
217 }
218 } else {
219 syslog(LOG_ERR, gettext(
220 "malloc fhtable_to_prune error %s\n"),
221 strerror(errno));
222 }
223 }
224 /*
225 * Log cycle frequency.
226 */
227 if ((defp = defread("CYCLE_FREQUENCY=")) != NULL) {
228 cycle_frequency = atol(defp);
229 if (debug > 0) {
230 (void) printf("cycle_frequency=%ld\n",
231 cycle_frequency);
232 }
233 }
234 /*
235 * defopen of NULL closes the open defaults file.
236 */
237 (void) defopen((char *)NULL);
238 }
239
240 if (Umask > ((mode_t)0777))
241 Umask = NFSLOG_UMASK;
242 (void) umask(Umask);
243
244 if (getrlimit(RLIMIT_FSIZE, &rl) < 0) {
245 error = errno;
246 (void) fprintf(stderr, gettext(
247 "getrlimit failed error is %d - %s\n"),
248 error, strerror(error));
249 exit(1);
250 }
251 if (min_size < 0 || min_size > rl.rlim_cur) {
252 (void) fprintf(stderr, gettext(
253 "MIN_PROCESSING_SIZE out of range, should be >= 0 and "
254 "< %d. Check %s.\n"), rl.rlim_cur, NFSLOG_OPTIONS_FILE);
255 exit(1);
256 }
257 if (idle_time > INT_MAX) {
258 (void) fprintf(stderr, gettext(
259 "IDLE_TIME out of range, should be >= 0 and "
260 "< %d. Check %s.\n"), INT_MAX, NFSLOG_OPTIONS_FILE);
261 exit(1);
262 }
263 if (max_logs_preserve < 0 || max_logs_preserve > INT_MAX) {
264 (void) fprintf(stderr, gettext(
265 "MAX_LOGS_PRESERVE out of range, should be >= 0 and "
266 "< %d. Check %s.\n"), INT_MAX, NFSLOG_OPTIONS_FILE);
267 exit(1);
268 }
269 if (mapping_update_interval < 0|| mapping_update_interval > INT_MAX) {
270 (void) fprintf(stderr, gettext(
271 "MAPPING_UPDATE_INTERVAL out of range, "
272 "should be >= 0 and "
273 "< %d. Check %s.\n"), INT_MAX, NFSLOG_OPTIONS_FILE);
274 exit(1);
275 }
276 if (cycle_frequency < 0 || cycle_frequency > INT_MAX) {
277 (void) fprintf(stderr, gettext(
278 "CYCLE_FREQUENCY out of range, should be >= 0 and "
279 "< %d. Check %s.\n"), INT_MAX, NFSLOG_OPTIONS_FILE);
280 exit(1);
281 }
282 /* get value in seconds */
283 cycle_frequency = cycle_frequency * 60 * 60;
284
285 /*
286 * If we dump core, it will be /core
287 */
288 if (chdir("/") < 0)
289 (void) fprintf(stderr, gettext("chdir /: %s"), strerror(errno));
290
291 /*
292 * Config errors to stderr
293 */
294 nfsl_errs_to_syslog = B_FALSE;
295
296 #ifndef DEBUG
297 pid = fork();
298 if (pid == -1) {
299 (void) fprintf(stderr, gettext("%s: fork failure\n"),
300 argv[0]);
301 exit(1);
302 }
303 if (pid != 0)
304 exit(0);
305 /*
306 * Config errors to syslog
307 */
308 nfsl_errs_to_syslog = B_TRUE;
309 #endif /* DEBUG */
310
311 (void) setlocale(LC_ALL, "");
312 #if !defined(TEXT_DOMAIN)
313 #define TEXT_DOMAIN "SYS_TEST"
314 #endif
315 (void) textdomain(TEXT_DOMAIN);
316
317 /*
318 * Check to see if nfslogd is already running.
319 */
320 if (process_pidfile(PID_STARTUP) != 0) {
321 exit(1);
322 }
323
324 (void) sigset(SIGUSR1, (void (*)(int))enable_logcycling);
325 (void) sigset(SIGHUP, (void (*)(int))full_cleanup);
326 (void) sigset(SIGTERM, (void(*)(int))short_cleanup);
327
328 #ifndef DEBUG
329 /*
330 * Close existing file descriptors, open "/dev/null" as
331 * standard input, output, and error, and detach from
332 * controlling terminal.
333 */
334 if (!debug && !test) {
335 closefrom(0);
336 (void) open("/dev/null", O_RDONLY);
337 (void) open("/dev/null", O_WRONLY);
338 (void) dup(1);
339 }
340 (void) setsid();
341 #endif /* DEBUG */
342
343 openlog(argv[0], LOG_PID, LOG_DAEMON);
344
345 public_fh.fh_len = NFS_FHMAXDATA;
346 public_fh.fh_xlen = NFS_FHMAXDATA;
347
348 /*
349 * Call once at startup to handle the nfslogtab
350 */
351 if (nfslogtab_deactivate_after_boot() == -1)
352 exit(1);
353
354 /*
355 * Get a list of buffers that need to be processed.
356 */
357 if (error = getbuffer_list(&buffer_list, &logtab_update)) {
358 syslog(LOG_ERR, gettext("Could not read %s: %s"),
359 NFSLOGTAB, strerror(error));
360 goto done;
361 }
362
363 /*
364 * Get the configuration list.
365 */
366 if (error = nfsl_getconfig_list(&config_list)) {
367 syslog(LOG_ERR, gettext(
368 "Could not obtain configuration list: %s"),
369 strerror(error));
370 goto done;
371 }
372
373 /*
374 * loop to process the work being generated by the NFS server
375 */
376 while (keep_running) {
377 buffers_processed = 0;
378 (void) checkbuffer_list(&buffer_list, &logtab_update);
379
380 while (buffer_list == NULL) {
381 /*
382 * Nothing to do
383 */
384 (void) sleep(idle_time);
385
386 if (!keep_running) {
387 /*
388 * We have been interrupted and asked to
389 * flush our transactions and exit.
390 */
391 close_all_translogs(config_list);
392 goto done;
393 }
394 (void) checkbuffer_list(&buffer_list, &logtab_update);
395 }
396
397 process_start = time(0);
398
399 if (error = nfsl_checkconfig_list(&config_list, NULL)) {
400 syslog(LOG_ERR, gettext(
401 "Could not update configuration list: %s"),
402 strerror(error));
403 nfsl_freeconfig_list(&config_list);
404 goto done;
405 }
406
407 if (difftime(time(0), last_cycle) > cycle_frequency)
408 need2cycle = TRUE;
409 if (need2cycle) {
410 error = cycle_logs(config_list, max_logs_preserve);
411 if (error) {
412 syslog(LOG_WARNING, gettext(
413 "One or more logfiles couldn't be cycled, "
414 "continuing regular processing"));
415 }
416 need2cycle = FALSE;
417 last_cycle = time(0);
418 }
419 if (difftime(time(0), last_prune) > prune_frequency)
420 need2prune = TRUE;
421 if (need2prune || fhtable_to_prune) {
422 error = prune_dbs(fhtable_to_prune);
423 if (error) {
424 syslog(LOG_WARNING, gettext(
425 "Error in cleaning database files"));
426 }
427 need2prune = FALSE;
428 last_prune = time(0);
429 /* After the first time, use the normal procedure */
430 free(fhtable_to_prune);
431 fhtable_to_prune = NULL;
432 }
433
434 for (bep = buffer_list; bep != NULL; bep = next) {
435 next = bep->be_next;
436 processed = 0;
437 error = process_buffer(bep, &config_list,
438 min_size, idle_time, &processed);
439 if (error == 0 && processed) {
440 if (bep->be_error) {
441 syslog(LOG_ERR, gettext(
442 "Buffer file '%s' "
443 "processed successfully."),
444 bep->be_name);
445 }
446 error =
447 nfslogtab_remove(&buffer_list, &bep, B_FALSE);
448 } else if (error == ENOENT) {
449 syslog(LOG_ERR, gettext("Removed entry"
450 "\t\"%s\t%s\t%d\" from %s"),
451 bep->be_name,
452 bep->be_sharepnt->se_name,
453 bep->be_sharepnt->se_state,
454 NFSLOGTAB);
455 error =
456 nfslogtab_remove(&buffer_list, &bep, B_TRUE);
457 } else if (error && error != bep->be_error) {
458 /*
459 * An error different from what we've reported
460 * before occured.
461 */
462 syslog(LOG_ERR, gettext(
463 "Cannot process buffer file '%s' - "
464 "will retry on every iteration."),
465 bep->be_name);
466 }
467
468 if (bep != NULL)
469 bep->be_error = error;
470 buffers_processed += processed;
471 }
472
473 transactions_timeout(config_list);
474
475 if (keep_running) {
476 uint_t process_time;
477
478 /*
479 * Sleep idle_time minus however long it took us
480 * to process the buffers.
481 */
482 process_time =
483 (uint_t)(difftime(time(0), process_start));
484 if (process_time < idle_time)
485 (void) sleep(idle_time - process_time);
486 }
487 }
488
489 done:
490 /*
491 * Make sure to clean house before we exit
492 */
493 close_all_translogs(config_list);
494 free_buffer_list(&buffer_list);
495 nfsl_freeconfig_list(&config_list);
496
497 (void) process_pidfile(PID_SHUTDOWN);
498
499 return (error);
500 }
501
502 static void
short_cleanup(void)503 short_cleanup(void)
504 {
505 if (debug) {
506 (void) fprintf(stderr,
507 "SIGTERM received, setting state to terminate...\n");
508 }
509 quick_cleaning = B_TRUE;
510 keep_running = B_FALSE;
511 }
512
513 static void
full_cleanup(void)514 full_cleanup(void)
515 {
516 if (debug) {
517 (void) fprintf(stderr,
518 "SIGHUP received, setting state to shutdown...\n");
519 }
520 quick_cleaning = keep_running = B_FALSE;
521 }
522
523 /*
524 * Removes nfslogtab entries matching the specified buffer_ent,
525 * if 'inactive_only' is set, then only inactive entries are removed.
526 * The buffer_list and sharepoint list entries are removed appropriately.
527 * Returns 0 on success, error otherwise.
528 */
529 static int
nfslogtab_remove(struct buffer_ent ** buffer_list,struct buffer_ent ** bep,boolean_t allstates)530 nfslogtab_remove(
531 struct buffer_ent **buffer_list,
532 struct buffer_ent **bep,
533 boolean_t allstates)
534 {
535 FILE *fd;
536 int error = 0;
537 struct sharepnt_ent *sep, *next;
538
539 fd = fopen(NFSLOGTAB, "r+");
540 rewind(fd);
541 if (fd == NULL) {
542 error = errno;
543 syslog(LOG_ERR, gettext("%s - %s\n"), NFSLOGTAB,
544 strerror(error));
545 return (error);
546 }
547
548 if (lockf(fileno(fd), F_LOCK, 0L) < 0) {
549 error = errno;
550 syslog(LOG_ERR, gettext("cannot lock %s - %s\n"), NFSLOGTAB,
551 strerror(error));
552 (void) fclose(fd);
553 return (error);
554 }
555
556 for (sep = (*bep)->be_sharepnt; sep != NULL; sep = next) {
557 next = sep->se_next;
558 if (!allstates && sep->se_state == LES_ACTIVE)
559 continue;
560 if (error = logtab_rement(fd, (*bep)->be_name, sep->se_name,
561 NULL, sep->se_state)) {
562 syslog(LOG_ERR, gettext("cannot update %s\n"),
563 NFSLOGTAB);
564 error = EIO;
565 goto errout;
566 }
567 remove_sharepnt_ent(&((*bep)->be_sharepnt), sep);
568 }
569
570 if ((*bep)->be_sharepnt == NULL) {
571 /*
572 * All sharepoints were removed from NFSLOGTAB.
573 * Remove this buffer from our list.
574 */
575 remove_buffer_ent(buffer_list, *bep);
576 *bep = NULL;
577 }
578
579 errout: (void) fclose(fd);
580
581 return (error);
582 }
583
584 /*
585 * Deactivates entries if nfslogtab is older than the boot time.
586 */
587 static int
nfslogtab_deactivate_after_boot(void)588 nfslogtab_deactivate_after_boot(void)
589 {
590 FILE *fd;
591 int error = 0;
592
593 fd = fopen(NFSLOGTAB, "r+");
594 if (fd == NULL) {
595 error = errno;
596 if (error != ENOENT) {
597 syslog(LOG_ERR, gettext("%s: %s\n"), NFSLOGTAB,
598 strerror(error));
599 return (-1);
600 }
601 return (0);
602 }
603
604 if (lockf(fileno(fd), F_LOCK, 0L) < 0) {
605 error = errno;
606 syslog(LOG_ERR, gettext("cannot lock %s: %s\n"),
607 NFSLOGTAB, strerror(error));
608 (void) fclose(fd);
609 return (-1);
610 }
611
612 if (logtab_deactivate_after_boot(fd) == -1) {
613 syslog(LOG_ERR, gettext(
614 "Cannot deactivate all entries in %s\n"), NFSLOGTAB);
615 (void) fclose(fd);
616 return (-1);
617 }
618
619 (void) fclose(fd);
620 return (0);
621 }
622
623 /*
624 * Enables the log file cycling flag.
625 */
626 static void
enable_logcycling(void)627 enable_logcycling(void)
628 {
629 need2cycle = TRUE;
630 }
631
632 /*
633 * Cycle all log files that have been active since the last cycling.
634 * This means it's not simply listed in the configuration file, but
635 * there's information associated with it.
636 */
637 static int
cycle_logs(nfsl_config_t * listp,int max_logs_preserve)638 cycle_logs(nfsl_config_t *listp, int max_logs_preserve)
639 {
640 nfsl_config_t *clp;
641 void *processed_list = NULL;
642 int error = 0, total_errors = 0;
643
644 for (clp = listp; clp != NULL; clp = clp->nc_next) {
645 error = 0;
646
647 /*
648 * Process transpath log.
649 */
650 if (clp->nc_logpath) {
651 if (is_cycle_needed(clp->nc_logpath, &processed_list,
652 B_FALSE, &error)) {
653 if (clp->nc_transcookie != NULL) {
654 nfslog_close_transactions(
655 &clp->nc_transcookie);
656 assert(clp->nc_transcookie == NULL);
657 }
658 error = cycle_log(clp->nc_logpath,
659 max_logs_preserve);
660 } else if (error)
661 goto errout;
662 }
663 total_errors += error;
664
665 /*
666 * Process elfpath log.
667 */
668 if (clp->nc_rpclogpath) {
669 if (is_cycle_needed(clp->nc_rpclogpath, &processed_list,
670 B_FALSE, &error)) {
671 error = cycle_log(clp->nc_rpclogpath,
672 max_logs_preserve);
673 } else if (error)
674 goto errout;
675 }
676 total_errors += error;
677 }
678
679 errout:
680 /*
681 * Free the list of processed entries.
682 */
683 (void) is_cycle_needed(NULL, &processed_list, B_TRUE, &error);
684
685 return (total_errors);
686 }
687
688 /*
689 * Returns TRUE if this log has not yet been cycled, FALSE otherwise.
690 * '*head' points to the list of entries that have been processed.
691 * If this is a new entry, it gets inserted at the beginning of the
692 * list, and returns TRUE.
693 *
694 * The list is freed if 'need2free' is set, and returns FALSE.
695 * Sets 'error' on failure, and returns FALSE.
696 */
697 static boolean_t
is_cycle_needed(char * path,void ** list,boolean_t need2free,int * error)698 is_cycle_needed(char *path, void **list, boolean_t need2free, int *error)
699 {
700 struct list {
701 char *log;
702 struct list *next;
703 } *head, *next, *p;
704
705 head = (struct list *)(*list);
706 if (need2free) {
707 /*
708 * Free the list and return
709 */
710 for (p = head; p != NULL; p = next) {
711 next = p->next;
712 free(p);
713 }
714 head = NULL;
715 return (B_FALSE);
716 }
717
718 assert(path != NULL);
719 *error = 0;
720 for (p = head; p != NULL; p = p->next) {
721 /*
722 * Have we seen this before?
723 */
724 if (strcmp(p->log, path) == 0)
725 return (B_FALSE);
726 }
727
728 /*
729 * Add it to the list
730 */
731 if ((p = (struct list *)malloc(sizeof (*p))) == NULL) {
732 *error = ENOMEM;
733 syslog(LOG_ERR, gettext("Cannot allocate memory."));
734 return (B_FALSE);
735 }
736 p->log = path;
737 p->next = head;
738 head = p;
739
740 return (B_TRUE);
741 }
742
743 /*
744 * cycle given log file.
745 */
746 int
cycle_log(char * filename,int max_logs_preserve)747 cycle_log(char *filename, int max_logs_preserve)
748 {
749 int i;
750 char *file_1;
751 char *file_2;
752 int error = 0;
753 struct stat st;
754
755 if (max_logs_preserve == 0)
756 return (0);
757
758 if (stat(filename, &st) == -1) {
759 if (errno == ENOENT) {
760 /*
761 * Nothing to cycle.
762 */
763 return (0);
764 }
765 return (errno);
766 }
767 file_1 = (char *)malloc(PATH_MAX);
768 file_2 = (char *)malloc(PATH_MAX);
769 for (i = max_logs_preserve - 2; i >= 0; i--) {
770 (void) sprintf(file_1, "%s.%d", filename, i);
771 (void) sprintf(file_2, "%s.%d", filename, (i + 1));
772 if (rename(file_1, file_2) == -1) {
773 error = errno;
774 if (error != ENOENT) {
775 syslog(LOG_ERR, gettext(
776 "cycle_log: can not rename %s to %s: %s"),
777 file_1, file_2, strerror(error));
778 goto out;
779 }
780 }
781 }
782 (void) sprintf(file_1, "%s.0", filename);
783 if (rename(filename, file_1) == -1) {
784 error = errno;
785 if (error != ENOENT) {
786 syslog(LOG_ERR, gettext(
787 "cycle_log: can not rename %s to %s: %s"),
788 filename, file_1, strerror(error));
789 goto out;
790 }
791 }
792 error = 0;
793
794 out: free(file_1);
795 free(file_2);
796
797 return (error);
798 }
799
800 /*
801 * If operation = PID_STARTUP then checks the nfslogd.pid file, it is opened
802 * if it exists, read and the pid is checked for an active process. If no
803 * active process is found, the pid of this process is written to the file,
804 * and 0 is returned, otherwise non-zero error is returned.
805 *
806 * If operation = PID_SHUTDOWN then removes the nfslogd.pid file and 0 is
807 * returned.
808 */
809 static int
process_pidfile(enum pidfile_operation op)810 process_pidfile(enum pidfile_operation op)
811 {
812 int fd, read_count;
813 int error = 0;
814 pid_t pid, mypid;
815 char *PidFile = NFSLOGD_PIDFILE;
816 int open_flags;
817
818 if (op == PID_STARTUP)
819 open_flags = O_RDWR | O_CREAT;
820 else {
821 assert(op == PID_SHUTDOWN);
822 open_flags = O_RDWR;
823 }
824
825 if ((fd = open(PidFile, open_flags, 0600)) < 0) {
826 error = errno;
827 if (error == ENOENT && op == PID_SHUTDOWN) {
828 /*
829 * We were going to remove it anyway
830 */
831 error = 0;
832 goto out;
833 }
834 (void) fprintf(stderr, gettext(
835 "cannot open or create pid file %s\n"), PidFile);
836 goto out;
837 }
838 if (lockf(fd, F_LOCK, 0) < 0) {
839 error = errno;
840 (void) fprintf(stderr, gettext(
841 "Cannot lock %s - %s\n"), PidFile,
842 strerror(error));
843 goto out;
844 }
845 if ((read_count = read(fd, &pid, sizeof (pid))) < 0) {
846 error = errno;
847 (void) fprintf(stderr, gettext(
848 "Can not read from file %s - %s\n"), PidFile,
849 strerror(error));
850 }
851
852 mypid = getpid();
853 if (op == PID_STARTUP) {
854 if (read_count > 0) {
855 if (kill(pid, 0) == 0) {
856 error = EEXIST;
857 (void) fprintf(stderr, gettext(
858 "Terminated - nfslogd(%ld) already "
859 "running.\n"), pid);
860 goto out;
861 } else if (errno != ESRCH) {
862 error = errno;
863 (void) fprintf(stderr, gettext(
864 "Unexpected error returned %s\n"),
865 strerror(error));
866 goto out;
867 }
868 }
869 pid = mypid;
870 /*
871 * rewind the file to overwrite old pid
872 */
873 (void) lseek(fd, 0, SEEK_SET);
874 if (write(fd, &mypid, sizeof (mypid)) < 0) {
875 error = errno;
876 (void) fprintf(stderr, gettext(
877 "Cannot update %s: %s\n"),
878 PidFile, strerror(error));
879 }
880 } else {
881 assert(pid == mypid);
882 if (unlink(PidFile)) {
883 error = errno;
884 syslog(LOG_ERR, gettext("Cannot remove %s: %s"),
885 strerror(error));
886 }
887 }
888 out:
889 if (fd >= 0)
890 (void) close(fd);
891 return (error);
892 }
893
894 /*
895 * Forces a timeout on all open transactions.
896 */
897 static void
transactions_timeout(nfsl_config_t * clp)898 transactions_timeout(nfsl_config_t *clp)
899 {
900 for (; clp != NULL; clp = clp->nc_next) {
901 if (clp->nc_transcookie != NULL) {
902 nfslog_process_trans_timeout(
903 (struct nfslog_trans_file *)clp->nc_transcookie,
904 FALSE);
905 }
906 }
907 }
908
909 /*
910 * Closes all transaction logs causing outstanding transactions
911 * to be flushed to their respective log.
912 */
913 static void
close_all_translogs(nfsl_config_t * clp)914 close_all_translogs(nfsl_config_t *clp)
915 {
916 for (; clp != NULL; clp = clp->nc_next) {
917 if (clp->nc_transcookie != NULL) {
918 nfslog_close_transactions(&clp->nc_transcookie);
919 assert(clp->nc_transcookie == NULL);
920 }
921 }
922 }
923