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 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * Postprocessor for NFS server logging.
31 */
32 #include <arpa/inet.h>
33 #include <assert.h>
34 #include <deflt.h>
35 #include <errno.h>
36 #include <fcntl.h>
37 #include <netinet/in.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <strings.h>
42 #include <signal.h>
43 #include <syslog.h>
44 #include <limits.h>
45 #include <libintl.h>
46 #include <locale.h>
47 #include <unistd.h>
48 #include <sys/types.h>
49 #include <sys/utsname.h>
50 #include <sys/stat.h>
51 #include <sys/resource.h>
52 #include <rpc/clnt_stat.h>
53 #include <nfs/nfs.h>
54 #include <nfs/export.h>
55 #include <nfs/nfs_log.h>
56 #include "fhtab.h"
57 #include "nfslogd.h"
58 #include "buffer_list.h"
59 #include "../lib/nfslog_config.h"
60 #include "../lib/nfslogtab.h"
61
62 enum pidfile_operation {
63 PID_STARTUP, PID_SHUTDOWN
64 };
65
66 static int nfslogtab_deactivate_after_boot(void);
67 static int
68 nfslogtab_remove(struct buffer_ent **, struct buffer_ent **, boolean_t);
69 static int cycle_logs(nfsl_config_t *, int);
70 static void enable_logcycling(void);
71 static int process_pidfile(enum pidfile_operation);
72 static void short_cleanup(void);
73 static void full_cleanup(void);
74 static void transactions_timeout(nfsl_config_t *);
75 static void close_all_translogs(nfsl_config_t *);
76 int cycle_log(char *, int);
77 static boolean_t is_cycle_needed(char *, void **, boolean_t, int *);
78
79 /*
80 * Configuration information.
81 */
82
83 int debug = 0;
84 boolean_t test = B_FALSE;
85 time_t mapping_update_interval = MAPPING_UPDATE_INTERVAL;
86 /* prune_timeout measures how old a database entry must be to be pruned */
87 time_t prune_timeout = (SECSPERHOUR * 7 * 24);
88 int max_logs_preserve = MAX_LOGS_PRESERVE;
89 uint_t idle_time = IDLE_TIME;
90 static mode_t Umask = NFSLOG_UMASK;
91 static long cycle_frequency = CYCLE_FREQUENCY;
92 /* prune_frequency measures how often should prune_dbs be called */
93 static long prune_frequency = (SECSPERHOUR * 24);
94 static int min_size = MIN_PROCESSING_SIZE;
95 static volatile bool_t need2cycle = FALSE;
96 static volatile bool_t need2prune = FALSE;
97 boolean_t keep_running = B_TRUE;
98 boolean_t quick_cleaning = B_FALSE;
99
100 /*ARGSUSED*/
101 int
main(int argc,char ** argv)102 main(int argc, char **argv)
103 {
104 struct rlimit rl;
105 int error = 0;
106 char *defp;
107 pid_t pid;
108
109 timestruc_t logtab_update;
110 time_t process_start, last_prune = time(0);
111 time_t last_cycle = time(0); /* last time logs were cycled */
112 int processed, buffers_processed;
113 struct buffer_ent *buffer_list = NULL, *bep, *next;
114 nfsl_config_t *config_list = NULL;
115 char *fhtable_to_prune = NULL;
116
117 /*
118 * Check to make sure user is root.
119 */
120 if (geteuid() != 0) {
121 (void) fprintf(stderr, gettext("%s must be run as root\n"),
122 argv[0]);
123 exit(1);
124 }
125
126 /*
127 * Read defaults file.
128 */
129 if (defopen(NFSLOG_OPTIONS_FILE) == 0) {
130 if ((defp = defread("DEBUG=")) != NULL) {
131 debug = atoi(defp);
132 if (debug > 0)
133 (void) printf("debug=%d\n", debug);
134 }
135 if ((defp = defread("TEST=")) != NULL) {
136 if (strcmp(defp, "TRUE") == 0)
137 test = B_TRUE;
138 if (debug > 0) {
139 if (test)
140 (void) printf("test=TRUE\n");
141 else
142 (void) printf("test=FALSE\n");
143 }
144 }
145 /*
146 * Set Umask for log and fhtable creation.
147 */
148 if ((defp = defread("UMASK=")) != NULL) {
149 if (sscanf(defp, "%lo", &Umask) != 1)
150 Umask = NFSLOG_UMASK;
151 }
152 /*
153 * Minimum size buffer should reach before processing.
154 */
155 if ((defp = defread("MIN_PROCESSING_SIZE=")) != NULL) {
156 min_size = atoi(defp);
157 if (debug > 0)
158 (void) printf("min_size=%d\n", min_size);
159 }
160 /*
161 * Number of seconds the daemon should
162 * sleep waiting for more work.
163 */
164 if ((defp = defread("IDLE_TIME=")) != NULL) {
165 idle_time = (uint_t)atoi(defp);
166 if (debug > 0)
167 (void) printf("idle_time=%d\n", idle_time);
168 }
169 /*
170 * Maximum number of logs to preserve.
171 */
172 if ((defp = defread("MAX_LOGS_PRESERVE=")) != NULL) {
173 max_logs_preserve = atoi(defp);
174 if (debug > 0) {
175 (void) printf("max_logs_preserve=%d\n",
176 max_logs_preserve);
177 }
178 }
179 /*
180 * Frequency of atime updates.
181 */
182 if ((defp = defread("MAPPING_UPDATE_INTERVAL=")) != NULL) {
183 mapping_update_interval = atoi(defp);
184 if (debug > 0) {
185 (void) printf("mapping_update_interval=%ld\n",
186 mapping_update_interval);
187 }
188 }
189 /*
190 * Time to remove entries
191 */
192 if ((defp = defread("PRUNE_TIMEOUT=")) != NULL) {
193 /*
194 * Prune timeout is in hours but we want
195 * deal with the time in seconds internally.
196 */
197 prune_timeout = atoi(defp);
198 prune_timeout *= SECSPERHOUR;
199 if (prune_timeout < prune_frequency)
200 prune_frequency = prune_timeout;
201 if (debug > 0) {
202 (void) printf("prune_timeout=%ld\n",
203 prune_timeout);
204 }
205 }
206 /*
207 * fhtable to prune when start (for debug/test purposes)
208 */
209 if ((defp = defread("PRUNE_FHTABLE=")) != NULL) {
210 /*
211 * Specify full pathname of fhtable to prune before
212 * any processing is to be done
213 */
214 if (fhtable_to_prune = malloc(strlen(defp) + 1)) {
215 (void) strcpy(fhtable_to_prune, defp);
216 if (debug > 0) {
217 (void) printf("fhtable to prune=%s\n",
218 fhtable_to_prune);
219 }
220 } else {
221 syslog(LOG_ERR, gettext(
222 "malloc fhtable_to_prune error %s\n"),
223 strerror(errno));
224 }
225 }
226 /*
227 * Log cycle frequency.
228 */
229 if ((defp = defread("CYCLE_FREQUENCY=")) != NULL) {
230 cycle_frequency = atol(defp);
231 if (debug > 0) {
232 (void) printf("cycle_frequency=%ld\n",
233 cycle_frequency);
234 }
235 }
236 /*
237 * defopen of NULL closes the open defaults file.
238 */
239 (void) defopen((char *)NULL);
240 }
241
242 if (Umask > ((mode_t)0777))
243 Umask = NFSLOG_UMASK;
244 (void) umask(Umask);
245
246 if (getrlimit(RLIMIT_FSIZE, &rl) < 0) {
247 error = errno;
248 (void) fprintf(stderr, gettext(
249 "getrlimit failed error is %d - %s\n"),
250 error, strerror(error));
251 exit(1);
252 }
253 if (min_size < 0 || min_size > rl.rlim_cur) {
254 (void) fprintf(stderr, gettext(
255 "MIN_PROCESSING_SIZE out of range, should be >= 0 and "
256 "< %d. Check %s.\n"), rl.rlim_cur, NFSLOG_OPTIONS_FILE);
257 exit(1);
258 }
259 if (idle_time > INT_MAX) {
260 (void) fprintf(stderr, gettext(
261 "IDLE_TIME out of range, should be >= 0 and "
262 "< %d. Check %s.\n"), INT_MAX, NFSLOG_OPTIONS_FILE);
263 exit(1);
264 }
265 if (max_logs_preserve < 0 || max_logs_preserve > INT_MAX) {
266 (void) fprintf(stderr, gettext(
267 "MAX_LOGS_PRESERVE out of range, should be >= 0 and "
268 "< %d. Check %s.\n"), INT_MAX, NFSLOG_OPTIONS_FILE);
269 exit(1);
270 }
271 if (mapping_update_interval < 0|| mapping_update_interval > INT_MAX) {
272 (void) fprintf(stderr, gettext(
273 "MAPPING_UPDATE_INTERVAL out of range, "
274 "should be >= 0 and "
275 "< %d. Check %s.\n"), INT_MAX, NFSLOG_OPTIONS_FILE);
276 exit(1);
277 }
278 if (cycle_frequency < 0 || cycle_frequency > INT_MAX) {
279 (void) fprintf(stderr, gettext(
280 "CYCLE_FREQUENCY out of range, should be >= 0 and "
281 "< %d. Check %s.\n"), INT_MAX, NFSLOG_OPTIONS_FILE);
282 exit(1);
283 }
284 /* get value in seconds */
285 cycle_frequency = cycle_frequency * 60 * 60;
286
287 /*
288 * If we dump core, it will be /core
289 */
290 if (chdir("/") < 0)
291 (void) fprintf(stderr, gettext("chdir /: %s"), strerror(errno));
292
293 /*
294 * Config errors to stderr
295 */
296 nfsl_errs_to_syslog = B_FALSE;
297
298 #ifndef DEBUG
299 pid = fork();
300 if (pid == -1) {
301 (void) fprintf(stderr, gettext("%s: fork failure\n"),
302 argv[0]);
303 exit(1);
304 }
305 if (pid != 0)
306 exit(0);
307 /*
308 * Config errors to syslog
309 */
310 nfsl_errs_to_syslog = B_TRUE;
311 #endif /* DEBUG */
312
313 (void) setlocale(LC_ALL, "");
314 #if !defined(TEXT_DOMAIN)
315 #define TEXT_DOMAIN "SYS_TEST"
316 #endif
317 (void) textdomain(TEXT_DOMAIN);
318
319 /*
320 * Check to see if nfslogd is already running.
321 */
322 if (process_pidfile(PID_STARTUP) != 0) {
323 exit(1);
324 }
325
326 (void) sigset(SIGUSR1, (void (*)(int))enable_logcycling);
327 (void) sigset(SIGHUP, (void (*)(int))full_cleanup);
328 (void) sigset(SIGTERM, (void(*)(int))short_cleanup);
329
330 #ifndef DEBUG
331 /*
332 * Close existing file descriptors, open "/dev/null" as
333 * standard input, output, and error, and detach from
334 * controlling terminal.
335 */
336 if (!debug && !test) {
337 closefrom(0);
338 (void) open("/dev/null", O_RDONLY);
339 (void) open("/dev/null", O_WRONLY);
340 (void) dup(1);
341 }
342 (void) setsid();
343 #endif /* DEBUG */
344
345 openlog(argv[0], LOG_PID, LOG_DAEMON);
346
347 public_fh.fh_len = NFS_FHMAXDATA;
348 public_fh.fh_xlen = NFS_FHMAXDATA;
349
350 /*
351 * Call once at startup to handle the nfslogtab
352 */
353 if (nfslogtab_deactivate_after_boot() == -1)
354 exit(1);
355
356 /*
357 * Get a list of buffers that need to be processed.
358 */
359 if (error = getbuffer_list(&buffer_list, &logtab_update)) {
360 syslog(LOG_ERR, gettext("Could not read %s: %s"),
361 NFSLOGTAB, strerror(error));
362 goto done;
363 }
364
365 /*
366 * Get the configuration list.
367 */
368 if (error = nfsl_getconfig_list(&config_list)) {
369 syslog(LOG_ERR, gettext(
370 "Could not obtain configuration list: %s"),
371 strerror(error));
372 goto done;
373 }
374
375 /*
376 * loop to process the work being generated by the NFS server
377 */
378 while (keep_running) {
379 buffers_processed = 0;
380 (void) checkbuffer_list(&buffer_list, &logtab_update);
381
382 while (buffer_list == NULL) {
383 /*
384 * Nothing to do
385 */
386 (void) sleep(idle_time);
387
388 if (!keep_running) {
389 /*
390 * We have been interrupted and asked to
391 * flush our transactions and exit.
392 */
393 close_all_translogs(config_list);
394 goto done;
395 }
396 (void) checkbuffer_list(&buffer_list, &logtab_update);
397 }
398
399 process_start = time(0);
400
401 if (error = nfsl_checkconfig_list(&config_list, NULL)) {
402 syslog(LOG_ERR, gettext(
403 "Could not update configuration list: %s"),
404 strerror(error));
405 nfsl_freeconfig_list(&config_list);
406 goto done;
407 }
408
409 if (difftime(time(0), last_cycle) > cycle_frequency)
410 need2cycle = TRUE;
411 if (need2cycle) {
412 error = cycle_logs(config_list, max_logs_preserve);
413 if (error) {
414 syslog(LOG_WARNING, gettext(
415 "One or more logfiles couldn't be cycled, "
416 "continuing regular processing"));
417 }
418 need2cycle = FALSE;
419 last_cycle = time(0);
420 }
421 if (difftime(time(0), last_prune) > prune_frequency)
422 need2prune = TRUE;
423 if (need2prune || fhtable_to_prune) {
424 error = prune_dbs(fhtable_to_prune);
425 if (error) {
426 syslog(LOG_WARNING, gettext(
427 "Error in cleaning database files"));
428 }
429 need2prune = FALSE;
430 last_prune = time(0);
431 /* After the first time, use the normal procedure */
432 free(fhtable_to_prune);
433 fhtable_to_prune = NULL;
434 }
435
436 for (bep = buffer_list; bep != NULL; bep = next) {
437 next = bep->be_next;
438 processed = 0;
439 error = process_buffer(bep, &config_list,
440 min_size, idle_time, &processed);
441 if (error == 0 && processed) {
442 if (bep->be_error) {
443 syslog(LOG_ERR, gettext(
444 "Buffer file '%s' "
445 "processed successfully."),
446 bep->be_name);
447 }
448 error =
449 nfslogtab_remove(&buffer_list, &bep, B_FALSE);
450 } else if (error == ENOENT) {
451 syslog(LOG_ERR, gettext("Removed entry"
452 "\t\"%s\t%s\t%d\" from %s"),
453 bep->be_name,
454 bep->be_sharepnt->se_name,
455 bep->be_sharepnt->se_state,
456 NFSLOGTAB);
457 error =
458 nfslogtab_remove(&buffer_list, &bep, B_TRUE);
459 } else if (error && error != bep->be_error) {
460 /*
461 * An error different from what we've reported
462 * before occured.
463 */
464 syslog(LOG_ERR, gettext(
465 "Cannot process buffer file '%s' - "
466 "will retry on every iteration."),
467 bep->be_name);
468 }
469
470 if (bep != NULL)
471 bep->be_error = error;
472 buffers_processed += processed;
473 }
474
475 transactions_timeout(config_list);
476
477 if (keep_running) {
478 uint_t process_time;
479
480 /*
481 * Sleep idle_time minus however long it took us
482 * to process the buffers.
483 */
484 process_time =
485 (uint_t)(difftime(time(0), process_start));
486 if (process_time < idle_time)
487 (void) sleep(idle_time - process_time);
488 }
489 }
490
491 done:
492 /*
493 * Make sure to clean house before we exit
494 */
495 close_all_translogs(config_list);
496 free_buffer_list(&buffer_list);
497 nfsl_freeconfig_list(&config_list);
498
499 (void) process_pidfile(PID_SHUTDOWN);
500
501 return (error);
502 }
503
504 static void
short_cleanup(void)505 short_cleanup(void)
506 {
507 if (debug) {
508 (void) fprintf(stderr,
509 "SIGTERM received, setting state to terminate...\n");
510 }
511 quick_cleaning = B_TRUE;
512 keep_running = B_FALSE;
513 }
514
515 static void
full_cleanup(void)516 full_cleanup(void)
517 {
518 if (debug) {
519 (void) fprintf(stderr,
520 "SIGHUP received, setting state to shutdown...\n");
521 }
522 quick_cleaning = keep_running = B_FALSE;
523 }
524
525 /*
526 * Removes nfslogtab entries matching the specified buffer_ent,
527 * if 'inactive_only' is set, then only inactive entries are removed.
528 * The buffer_list and sharepoint list entries are removed appropriately.
529 * Returns 0 on success, error otherwise.
530 */
531 static int
nfslogtab_remove(struct buffer_ent ** buffer_list,struct buffer_ent ** bep,boolean_t allstates)532 nfslogtab_remove(
533 struct buffer_ent **buffer_list,
534 struct buffer_ent **bep,
535 boolean_t allstates)
536 {
537 FILE *fd;
538 int error = 0;
539 struct sharepnt_ent *sep, *next;
540
541 fd = fopen(NFSLOGTAB, "r+");
542 rewind(fd);
543 if (fd == NULL) {
544 error = errno;
545 syslog(LOG_ERR, gettext("%s - %s\n"), NFSLOGTAB,
546 strerror(error));
547 return (error);
548 }
549
550 if (lockf(fileno(fd), F_LOCK, 0L) < 0) {
551 error = errno;
552 syslog(LOG_ERR, gettext("cannot lock %s - %s\n"), NFSLOGTAB,
553 strerror(error));
554 (void) fclose(fd);
555 return (error);
556 }
557
558 for (sep = (*bep)->be_sharepnt; sep != NULL; sep = next) {
559 next = sep->se_next;
560 if (!allstates && sep->se_state == LES_ACTIVE)
561 continue;
562 if (error = logtab_rement(fd, (*bep)->be_name, sep->se_name,
563 NULL, sep->se_state)) {
564 syslog(LOG_ERR, gettext("cannot update %s\n"),
565 NFSLOGTAB);
566 error = EIO;
567 goto errout;
568 }
569 remove_sharepnt_ent(&((*bep)->be_sharepnt), sep);
570 }
571
572 if ((*bep)->be_sharepnt == NULL) {
573 /*
574 * All sharepoints were removed from NFSLOGTAB.
575 * Remove this buffer from our list.
576 */
577 remove_buffer_ent(buffer_list, *bep);
578 *bep = NULL;
579 }
580
581 errout: (void) fclose(fd);
582
583 return (error);
584 }
585
586 /*
587 * Deactivates entries if nfslogtab is older than the boot time.
588 */
589 static int
nfslogtab_deactivate_after_boot(void)590 nfslogtab_deactivate_after_boot(void)
591 {
592 FILE *fd;
593 int error = 0;
594
595 fd = fopen(NFSLOGTAB, "r+");
596 if (fd == NULL) {
597 error = errno;
598 if (error != ENOENT) {
599 syslog(LOG_ERR, gettext("%s: %s\n"), NFSLOGTAB,
600 strerror(error));
601 return (-1);
602 }
603 return (0);
604 }
605
606 if (lockf(fileno(fd), F_LOCK, 0L) < 0) {
607 error = errno;
608 syslog(LOG_ERR, gettext("cannot lock %s: %s\n"),
609 NFSLOGTAB, strerror(error));
610 (void) fclose(fd);
611 return (-1);
612 }
613
614 if (logtab_deactivate_after_boot(fd) == -1) {
615 syslog(LOG_ERR, gettext(
616 "Cannot deactivate all entries in %s\n"), NFSLOGTAB);
617 (void) fclose(fd);
618 return (-1);
619 }
620
621 (void) fclose(fd);
622 return (0);
623 }
624
625 /*
626 * Enables the log file cycling flag.
627 */
628 static void
enable_logcycling(void)629 enable_logcycling(void)
630 {
631 need2cycle = TRUE;
632 }
633
634 /*
635 * Cycle all log files that have been active since the last cycling.
636 * This means it's not simply listed in the configuration file, but
637 * there's information associated with it.
638 */
639 static int
cycle_logs(nfsl_config_t * listp,int max_logs_preserve)640 cycle_logs(nfsl_config_t *listp, int max_logs_preserve)
641 {
642 nfsl_config_t *clp;
643 void *processed_list = NULL;
644 int error = 0, total_errors = 0;
645
646 for (clp = listp; clp != NULL; clp = clp->nc_next) {
647 error = 0;
648
649 /*
650 * Process transpath log.
651 */
652 if (clp->nc_logpath) {
653 if (is_cycle_needed(clp->nc_logpath, &processed_list,
654 B_FALSE, &error)) {
655 if (clp->nc_transcookie != NULL) {
656 nfslog_close_transactions(
657 &clp->nc_transcookie);
658 assert(clp->nc_transcookie == NULL);
659 }
660 error = cycle_log(clp->nc_logpath,
661 max_logs_preserve);
662 } else if (error)
663 goto errout;
664 }
665 total_errors += error;
666
667 /*
668 * Process elfpath log.
669 */
670 if (clp->nc_rpclogpath) {
671 if (is_cycle_needed(clp->nc_rpclogpath, &processed_list,
672 B_FALSE, &error)) {
673 error = cycle_log(clp->nc_rpclogpath,
674 max_logs_preserve);
675 } else if (error)
676 goto errout;
677 }
678 total_errors += error;
679 }
680
681 errout:
682 /*
683 * Free the list of processed entries.
684 */
685 (void) is_cycle_needed(NULL, &processed_list, B_TRUE, &error);
686
687 return (total_errors);
688 }
689
690 /*
691 * Returns TRUE if this log has not yet been cycled, FALSE otherwise.
692 * '*head' points to the list of entries that have been processed.
693 * If this is a new entry, it gets inserted at the beginning of the
694 * list, and returns TRUE.
695 *
696 * The list is freed if 'need2free' is set, and returns FALSE.
697 * Sets 'error' on failure, and returns FALSE.
698 */
699 static boolean_t
is_cycle_needed(char * path,void ** list,boolean_t need2free,int * error)700 is_cycle_needed(char *path, void **list, boolean_t need2free, int *error)
701 {
702 struct list {
703 char *log;
704 struct list *next;
705 } *head, *next, *p;
706
707 head = (struct list *)(*list);
708 if (need2free) {
709 /*
710 * Free the list and return
711 */
712 for (p = head; p != NULL; p = next) {
713 next = p->next;
714 free(p);
715 }
716 head = NULL;
717 return (B_FALSE);
718 }
719
720 assert(path != NULL);
721 *error = 0;
722 for (p = head; p != NULL; p = p->next) {
723 /*
724 * Have we seen this before?
725 */
726 if (strcmp(p->log, path) == 0)
727 return (B_FALSE);
728 }
729
730 /*
731 * Add it to the list
732 */
733 if ((p = (struct list *)malloc(sizeof (*p))) == NULL) {
734 *error = ENOMEM;
735 syslog(LOG_ERR, gettext("Cannot allocate memory."));
736 return (B_FALSE);
737 }
738 p->log = path;
739 p->next = head;
740 head = p;
741
742 return (B_TRUE);
743 }
744
745 /*
746 * cycle given log file.
747 */
748 int
cycle_log(char * filename,int max_logs_preserve)749 cycle_log(char *filename, int max_logs_preserve)
750 {
751 int i;
752 char *file_1;
753 char *file_2;
754 int error = 0;
755 struct stat st;
756
757 if (max_logs_preserve == 0)
758 return (0);
759
760 if (stat(filename, &st) == -1) {
761 if (errno == ENOENT) {
762 /*
763 * Nothing to cycle.
764 */
765 return (0);
766 }
767 return (errno);
768 }
769 file_1 = (char *)malloc(PATH_MAX);
770 file_2 = (char *)malloc(PATH_MAX);
771 for (i = max_logs_preserve - 2; i >= 0; i--) {
772 (void) sprintf(file_1, "%s.%d", filename, i);
773 (void) sprintf(file_2, "%s.%d", filename, (i + 1));
774 if (rename(file_1, file_2) == -1) {
775 error = errno;
776 if (error != ENOENT) {
777 syslog(LOG_ERR, gettext(
778 "cycle_log: can not rename %s to %s: %s"),
779 file_1, file_2, strerror(error));
780 goto out;
781 }
782 }
783 }
784 (void) sprintf(file_1, "%s.0", filename);
785 if (rename(filename, file_1) == -1) {
786 error = errno;
787 if (error != ENOENT) {
788 syslog(LOG_ERR, gettext(
789 "cycle_log: can not rename %s to %s: %s"),
790 filename, file_1, strerror(error));
791 goto out;
792 }
793 }
794 error = 0;
795
796 out: free(file_1);
797 free(file_2);
798
799 return (error);
800 }
801
802 /*
803 * If operation = PID_STARTUP then checks the nfslogd.pid file, it is opened
804 * if it exists, read and the pid is checked for an active process. If no
805 * active process is found, the pid of this process is written to the file,
806 * and 0 is returned, otherwise non-zero error is returned.
807 *
808 * If operation = PID_SHUTDOWN then removes the nfslogd.pid file and 0 is
809 * returned.
810 */
811 static int
process_pidfile(enum pidfile_operation op)812 process_pidfile(enum pidfile_operation op)
813 {
814 int fd, read_count;
815 int error = 0;
816 pid_t pid, mypid;
817 char *PidFile = NFSLOGD_PIDFILE;
818 int open_flags;
819
820 if (op == PID_STARTUP)
821 open_flags = O_RDWR | O_CREAT;
822 else {
823 assert(op == PID_SHUTDOWN);
824 open_flags = O_RDWR;
825 }
826
827 if ((fd = open(PidFile, open_flags, 0600)) < 0) {
828 error = errno;
829 if (error == ENOENT && op == PID_SHUTDOWN) {
830 /*
831 * We were going to remove it anyway
832 */
833 error = 0;
834 goto out;
835 }
836 (void) fprintf(stderr, gettext(
837 "cannot open or create pid file %s\n"), PidFile);
838 goto out;
839 }
840 if (lockf(fd, F_LOCK, 0) < 0) {
841 error = errno;
842 (void) fprintf(stderr, gettext(
843 "Cannot lock %s - %s\n"), PidFile,
844 strerror(error));
845 goto out;
846 }
847 if ((read_count = read(fd, &pid, sizeof (pid))) < 0) {
848 error = errno;
849 (void) fprintf(stderr, gettext(
850 "Can not read from file %s - %s\n"), PidFile,
851 strerror(error));
852 }
853
854 mypid = getpid();
855 if (op == PID_STARTUP) {
856 if (read_count > 0) {
857 if (kill(pid, 0) == 0) {
858 error = EEXIST;
859 (void) fprintf(stderr, gettext(
860 "Terminated - nfslogd(%ld) already "
861 "running.\n"), pid);
862 goto out;
863 } else if (errno != ESRCH) {
864 error = errno;
865 (void) fprintf(stderr, gettext(
866 "Unexpected error returned %s\n"),
867 strerror(error));
868 goto out;
869 }
870 }
871 pid = mypid;
872 /*
873 * rewind the file to overwrite old pid
874 */
875 (void) lseek(fd, 0, SEEK_SET);
876 if (write(fd, &mypid, sizeof (mypid)) < 0) {
877 error = errno;
878 (void) fprintf(stderr, gettext(
879 "Cannot update %s: %s\n"),
880 PidFile, strerror(error));
881 }
882 } else {
883 assert(pid == mypid);
884 if (unlink(PidFile)) {
885 error = errno;
886 syslog(LOG_ERR, gettext("Cannot remove %s: %s"),
887 strerror(error));
888 }
889 }
890 out:
891 if (fd >= 0)
892 (void) close(fd);
893 return (error);
894 }
895
896 /*
897 * Forces a timeout on all open transactions.
898 */
899 static void
transactions_timeout(nfsl_config_t * clp)900 transactions_timeout(nfsl_config_t *clp)
901 {
902 for (; clp != NULL; clp = clp->nc_next) {
903 if (clp->nc_transcookie != NULL) {
904 nfslog_process_trans_timeout(
905 (struct nfslog_trans_file *)clp->nc_transcookie,
906 FALSE);
907 }
908 }
909 }
910
911 /*
912 * Closes all transaction logs causing outstanding transactions
913 * to be flushed to their respective log.
914 */
915 static void
close_all_translogs(nfsl_config_t * clp)916 close_all_translogs(nfsl_config_t *clp)
917 {
918 for (; clp != NULL; clp = clp->nc_next) {
919 if (clp->nc_transcookie != NULL) {
920 nfslog_close_transactions(&clp->nc_transcookie);
921 assert(clp->nc_transcookie == NULL);
922 }
923 }
924 }
925