summaryrefslogtreecommitdiffstats
path: root/tools/storage_mon.c
blob: 1aae29e58068910a0c15321102d2c7eb7f782d9f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
#include <stdio.h>
#include <getopt.h>
#include <stdlib.h>
#include <stdint.h>
#include <syslog.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#ifdef __FreeBSD__
#include <sys/disk.h>
#endif
#include <config.h>
#include <glib.h>
#include <libgen.h>

#include <qb/qbdefs.h>
#include <qb/qblog.h>
#include <qb/qbloop.h>
#include <qb/qbutil.h>
#include <qb/qbipcs.h>
#include <qb/qbipcc.h>

#define MAX_DEVICES 25
#define DEFAULT_TIMEOUT 10
#define DEFAULT_INTERVAL 30
#define DEFAULT_PIDFILE HA_VARRUNDIR "storage_mon.pid"
#define DEFAULT_ATTRNAME "#health-storage_mon"
#define SMON_GET_RESULT_COMMAND "get_check_value"
#define SMON_RESULT_OK "green"
#define SMON_RESULT_NG "red"
#define SMON_RESULT_COMMAND_ERROR "unknown command"
#define SMON_BUFF_1MEG 1048576
#define SMON_MAX_IPCSNAME 256
#define SMON_MAX_MSGSIZE 128
#define SMON_MAX_RESP_SIZE 100

#define PRINT_STORAGE_MON_ERR(fmt, ...) if (!daemonize) { \
					fprintf(stderr, fmt"\n", __VA_ARGS__); \
				} else { \
					syslog(LOG_ERR, fmt, __VA_ARGS__); \
				}
#define PRINT_STORAGE_MON_ERR_NOARGS(str) if (!daemonize) { \
					fprintf(stderr, str"\n"); \
				} else { \
					syslog(LOG_ERR, str); \
				}

#define PRINT_STORAGE_MON_INFO(fmt, ...) if (!daemonize) { \
					printf(fmt"\n", __VA_ARGS__); \
				} else { \
					syslog(LOG_INFO, fmt, __VA_ARGS__); \
				}

struct storage_mon_timer_data {
	int interval;
};

struct storage_mon_check_value_req {
	struct qb_ipc_request_header hdr;
	char message[SMON_MAX_MSGSIZE];
};


struct storage_mon_check_value_res {
        struct qb_ipc_response_header hdr;
        char message[SMON_MAX_MSGSIZE];
};


char *devices[MAX_DEVICES];
int scores[MAX_DEVICES];
size_t device_count = 0;
int timeout = DEFAULT_TIMEOUT;
int verbose = 0;
int inject_error_percent = 0;
const char *attrname = DEFAULT_ATTRNAME;
gboolean daemonize = FALSE;
int shutting_down = FALSE;
static qb_ipcs_service_t *ipcs;
int final_score = 0;
int response_final_score = 0;
pid_t test_forks[MAX_DEVICES];
size_t finished_count = 0;
gboolean daemon_check_first_all_devices = FALSE;

static qb_loop_t *storage_mon_poll_handle;
static qb_loop_timer_handle timer_handle;
static qb_loop_timer_handle expire_handle;
static struct storage_mon_timer_data timer_d;

static int test_device_main(gpointer data);
static void wrap_test_device_main(void *data);

static void usage(char *name, FILE *f)
{
	fprintf(f, "usage: %s [-hv] [-d <device>]... [-s <score>]... [-t <secs>]\n", name);
	fprintf(f, "      --device <dev>  device to test, up to %d instances\n", MAX_DEVICES);
	fprintf(f, "      --score  <n>    score if device fails the test. Must match --device count\n");
	fprintf(f, "      --timeout <n>   max time to wait for a device test to come back. in seconds (default %d)\n", DEFAULT_TIMEOUT);
	fprintf(f, "      --inject-errors-percent <n> Generate EIO errors <n>%% of the time (for testing only)\n");
	fprintf(f, "      --daemonize      test run in daemons.\n");      
	fprintf(f, "      --client      client connection to daemon. requires the attrname option.\n");
	fprintf(f, "      --interval <n>       interval to test. in seconds (default %d)(for daemonize only)\n", DEFAULT_INTERVAL);
	fprintf(f, "      --pidfile <path>     file path to record pid (default %s)(for daemonize only)\n", DEFAULT_PIDFILE);
	fprintf(f, "      --attrname <attr>    attribute name to update test result (default %s)(for daemonize/client only)\n", DEFAULT_ATTRNAME);
	fprintf(f, "      --verbose        emit extra output to stdout\n");
	fprintf(f, "      --help           print this message\n");
}

/* Check one device */
static void *test_device(const char *device, int verbose, int inject_error_percent)
{
	uint64_t devsize;
	int flags = O_RDONLY | O_DIRECT;
	int device_fd;
	int res;
	off_t seek_spot;

	if (verbose) {
		printf("Testing device %s\n", device);
	}

	device_fd = open(device, flags);
	if (device_fd < 0) {
		if (errno != EINVAL) {
			PRINT_STORAGE_MON_ERR("Failed to open %s: %s", device, strerror(errno));
			exit(-1);
		}
		flags &= ~O_DIRECT;
		device_fd = open(device, flags);
		if (device_fd < 0) {
			PRINT_STORAGE_MON_ERR("Failed to open %s: %s", device, strerror(errno));
			exit(-1);
		}
	}
#ifdef __FreeBSD__
	res = ioctl(device_fd, DIOCGMEDIASIZE, &devsize);
#else
	res = ioctl(device_fd, BLKGETSIZE64, &devsize);
#endif
	if (res < 0) {
		PRINT_STORAGE_MON_ERR("Failed to get device size for %s: %s", device, strerror(errno));
		goto error;
	}
	if (verbose) {
		PRINT_STORAGE_MON_INFO("%s: opened %s O_DIRECT, size=%zu", device, (flags & O_DIRECT)?"with":"without", devsize);
	}

	/* Don't fret about real randomness */
	srand(time(NULL) + getpid());
	/* Pick a random place on the device - sector aligned */
	seek_spot = (rand() % (devsize-1024)) & 0xFFFFFFFFFFFFFE00;
	res = lseek(device_fd, seek_spot, SEEK_SET);
	if (res < 0) {
		PRINT_STORAGE_MON_ERR("Failed to seek %s: %s", device, strerror(errno));
		goto error;
	}
	if (verbose) {
		PRINT_STORAGE_MON_INFO("%s: reading from pos %ld", device, seek_spot);
	}

	if (flags & O_DIRECT) {
		int sec_size = 0;
		void *buffer;

#ifdef __FreeBSD__
		res = ioctl(device_fd, DIOCGSECTORSIZE, &sec_size);
#else
		res = ioctl(device_fd, BLKSSZGET, &sec_size);
#endif
		if (res < 0) {
			PRINT_STORAGE_MON_ERR("Failed to get block device sector size for %s: %s", device, strerror(errno));
			goto error;
		}

		if (posix_memalign(&buffer, sysconf(_SC_PAGESIZE), sec_size) != 0) {
			PRINT_STORAGE_MON_ERR("Failed to allocate aligned memory: %s", strerror(errno));
			goto error;
		}
		res = read(device_fd, buffer, sec_size);
		free(buffer);
		if (res < 0) {
			PRINT_STORAGE_MON_ERR("Failed to read %s: %s", device, strerror(errno));
			goto error;
		}
		if (res < sec_size) {
			PRINT_STORAGE_MON_ERR("Failed to read %d bytes from %s, got %d", sec_size, device, res);
			goto error;
		}
	} else {
		char buffer[512];

		res = read(device_fd, buffer, sizeof(buffer));
		if (res < 0) {
			PRINT_STORAGE_MON_ERR("Failed to read %s: %s", device, strerror(errno));
			goto error;
		}
		if (res < (int)sizeof(buffer)) {
			PRINT_STORAGE_MON_ERR("Failed to read %ld bytes from %s, got %d", sizeof(buffer), device, res);
			goto error;
		}
	}

	/* Fake an error */
	if (inject_error_percent && ((rand() % 100) < inject_error_percent)) {
		PRINT_STORAGE_MON_ERR_NOARGS("People, please fasten your seatbelts, injecting errors!");
		goto error;
	}
	res = close(device_fd);
	if (res != 0) {
		PRINT_STORAGE_MON_ERR("Failed to close %s: %s", device, strerror(errno));
		exit(-1);
	}

	if (verbose) {
		PRINT_STORAGE_MON_INFO("%s: done", device);
	}
	exit(0);

error:
	close(device_fd);
	exit(-1);
}

static gboolean is_child_runnning(void)
{
	size_t i;

	for (i=0; i<device_count; i++) {
		if (test_forks[i] != 0) {
			return TRUE;
		}
	}
	return FALSE;
}

static void stop_child(pid_t pid, int signal)
{
	errno = 0;

    	if (kill(pid, signal) == 0) {
       		syslog(LOG_DEBUG, "Stopping chilg sent signal %d to process %lld", signal, (long long) pid);
    	} else {
        	syslog(LOG_ERR, "Could not stop child (process %lld) with signal %d: %s", (long long) pid, signal, strerror(errno));
   	}
}

static int32_t sigterm_handler(int num, void *data)
{
	size_t i;
	shutting_down = TRUE;

	/* If there is an unfired timer, stop it. */
	qb_loop_timer_del(storage_mon_poll_handle, timer_handle);

	/* Send SIGTERM to non-terminating device monitoring processes. */
	if (is_child_runnning()) {
		/* See if threads have finished */
		for (i=0; i<device_count; i++) {
			if (test_forks[i] > 0 ) {
				stop_child(test_forks[i], SIGTERM);
			}
		}

	}

	/* Set a timer for termination. */
	qb_loop_timer_add(storage_mon_poll_handle, QB_LOOP_HIGH, 0, NULL, wrap_test_device_main, &timer_handle); 

	return 0; 
}

static size_t find_child_pid(int pid)
{
	size_t i;

	for (i=0; i<device_count; i++) {
		if (test_forks[i] > 0 ) {
			if (test_forks[i] == pid) {
				return i;
			}
		}
	}	
	return -1;
}

static int32_t sigchld_handler(int32_t sig, void *data)
{
	pid_t pid;
	size_t index;
	int status;

	if (is_child_runnning()) {
		while(1) {
			pid = waitpid(-1, &status, WNOHANG);
			if (pid > 0) {
				if (WIFEXITED(status)) {
					index = find_child_pid(pid);
					if (index >= 0) {
						/* If the expire timer is running, no timeout has occurred, 			*/
						/* so add the final_score from the exit code of the terminated child process. 	*/
						if (qb_loop_timer_is_running(storage_mon_poll_handle, expire_handle)) { 
							if (WEXITSTATUS(status) !=0) {
								final_score += scores[index];

								/* Update response values immediately in preparation for inquiries from clients. */
								response_final_score = final_score;

								/* Even in the first demon mode check, if there is an error device, clear */
								/* the flag to return the response to the client without waiting for all devices to finish. */
								daemon_check_first_all_devices = TRUE;
							}
						}

						finished_count++;
						test_forks[index] = 0;
					
					}
				}
			} else {
				break;
			}
		}
	}
	return 0;
}

static void child_shutdown(int nsig)
{
	exit(1);
}

static int write_pid_file(const char *pidfile)
{
	char *pid;
	char *dir, *str = NULL;
	int fd = -1;
	int rc = -1;
	int i, len;

	if (asprintf(&pid, "%jd", (intmax_t)getpid()) < 0) {
		syslog(LOG_ERR, "Failed to allocate memory to store PID");
		pid = NULL;
		goto done;
	}

	str = strdup(pidfile);
	if (str == NULL) {
		syslog(LOG_ERR, "Failed to duplicate string ['%s']", pidfile);
		goto done;
	}
	dir = dirname(str);
	for (i = 1, len = strlen(dir); i < len; i++) {
		if (dir[i] == '/') {
			dir[i] = 0;
			if ((mkdir(dir, 0640) < 0) && (errno != EEXIST)) {
				syslog(LOG_ERR, "Failed to create directory %s: %s", dir, strerror(errno));
				goto done;
			}
			dir[i] = '/';
		}
	}
	if ((mkdir(dir, 0640) < 0) && (errno != EEXIST)) {
		syslog(LOG_ERR, "Failed to create directory %s: %s", dir, strerror(errno));
		goto done;
	}

	fd = open(pidfile, O_CREAT | O_WRONLY, 0640);
	if (fd < 0) {
		syslog(LOG_ERR, "Failed to open %s: %s", pidfile, strerror(errno));
		goto done;
	}

	if (write(fd, pid, strlen(pid)) != strlen(pid)) {
		syslog(LOG_ERR, "Failed to write '%s' to %s: %s", pid, pidfile, strerror(errno));
		goto done;
	}
	close(fd);
	rc = 0;
done:
	if (pid != NULL) {
		free(pid);
	}
	if (str != NULL) {
		free(str);
	}
	return rc;
}

static void child_timeout_handler(void *data)
{
	size_t i;

	if (is_child_runnning()) {
		for (i=0; i<device_count; i++) {
			if (test_forks[i] > 0) {
				/* If timeout occurs before SIGCHLD, add child process failure score to final_score. */
				final_score += scores[i];

				/* Update response values immediately in preparation for inquiries from clients. */
				response_final_score = final_score;

				/* Even in the first demon mode check, if there is an error device, clear */
				/* the flag to return the response to the client without waiting for all devices to finish. */
				daemon_check_first_all_devices = TRUE;
			}
		}
	}
}

static void wrap_test_device_main(void *data)
{
	struct storage_mon_timer_data *timer_data = (struct storage_mon_timer_data*)data;
	test_device_main((timer_data != NULL) ? &timer_data->interval : NULL);
}

static int test_device_main(gpointer data)
{
	size_t i;
	struct timespec ts;
	time_t start_time;
	gboolean device_check = TRUE;

	if (daemonize) {
		if (shutting_down == TRUE) {
			goto done;
		}

		/* In the case of daemon mode, it is avoided that the timer is triggered and the number of */
		/* child processes increases while the device monitoring child process is not completed. */
		if (is_child_runnning()) {
			device_check = FALSE;
		}
		
		if (device_count == finished_count && device_check) { 
			/* Update the result value for the client response once all checks have completed. */
			response_final_score = final_score;

			if (!daemon_check_first_all_devices) {
				daemon_check_first_all_devices = TRUE;
			}
		}
	}

	if (device_check) {
		/* Reset final_score, finished_count, test_forks[] */
		final_score = 0;
		finished_count = 0;

		memset(test_forks, 0, sizeof(test_forks));
		for (i=0; i<device_count; i++) {
			test_forks[i] = fork();
			if (test_forks[i] < 0) {
				PRINT_STORAGE_MON_ERR("Error spawning fork for %s: %s\n", devices[i], strerror(errno));
				/* Just test the devices we have */
				break;
			}
			/* child */
			if (test_forks[i] == 0) {
				if (daemonize) {
					signal(SIGTERM, &child_shutdown);
				}
				test_device(devices[i], verbose, inject_error_percent);
			}
		}

		if (!daemonize) {
			/* See if they have finished */
			clock_gettime(CLOCK_REALTIME, &ts);
			start_time = ts.tv_sec;

			while ((finished_count < device_count) && ((start_time + timeout) > ts.tv_sec)) {
				for (i=0; i<device_count; i++) {
					int wstatus;
					pid_t w;

					if (test_forks[i] > 0) {
						w = waitpid(test_forks[i], &wstatus, WUNTRACED | WNOHANG | WCONTINUED);
						if (w < 0) {
							PRINT_STORAGE_MON_ERR("waitpid on %s failed: %s", devices[i], strerror(errno));
							return -1;
						}

						if (w == test_forks[i]) {
							if (WIFEXITED(wstatus)) {
								if (WEXITSTATUS(wstatus) != 0) {
									syslog(LOG_ERR, "Error reading from device %s", devices[i]);
									final_score += scores[i];
								}

								finished_count++;
								test_forks[i] = 0;
							}
						}
					}
				}

				usleep(100000);

				clock_gettime(CLOCK_REALTIME, &ts);
			}

			/* See which threads have not finished */
			for (i=0; i<device_count; i++) {
				if (test_forks[i] != 0) {
					syslog(LOG_ERR, "Reading from device %s did not complete in %d seconds timeout", devices[i], timeout);
					fprintf(stderr, "Thread for device %s did not complete in time\n", devices[i]);
					final_score += scores[i];
				}
			}
		} else {
			/* Run the child process timeout watch timer. */
			qb_loop_timer_add(storage_mon_poll_handle, QB_LOOP_MED, timeout * QB_TIME_NS_IN_SEC, NULL, child_timeout_handler, &expire_handle); 
		}
	}
	if (!daemonize) {
		if (verbose) {
			printf("Final score is %d\n", final_score);
		}
		return final_score;
	} else {
		if (data != NULL) {
			/* Sets the device check to run on the next timer. */
			qb_loop_timer_add(storage_mon_poll_handle, QB_LOOP_MED, timer_d.interval * QB_TIME_NS_IN_SEC, &timer_d, wrap_test_device_main, &timer_handle); 
		}
		return TRUE;
	}
done:
	qb_loop_stop(storage_mon_poll_handle);
	return FALSE;
}

static int32_t
storage_mon_job_add(enum qb_loop_priority p, void *data, qb_loop_job_dispatch_fn fn)
{
	return qb_loop_job_add(storage_mon_poll_handle, p, data, fn);
}

static int32_t
storage_mon_dispatch_add(enum qb_loop_priority p, int32_t fd, int32_t evts,
		void *data, qb_ipcs_dispatch_fn_t fn)
{
	return qb_loop_poll_add(storage_mon_poll_handle, p, fd, evts, data, fn);
}

static int32_t
storage_mon_dispatch_mod(enum qb_loop_priority p, int32_t fd, int32_t evts,
		void *data, qb_ipcs_dispatch_fn_t fn)
{
	return qb_loop_poll_mod(storage_mon_poll_handle, p, fd, evts, data, fn);
}

static int32_t
storage_mon_dispatch_del(int32_t fd)
{
	return qb_loop_poll_del(storage_mon_poll_handle, fd);
}

static int32_t
storage_mon_ipcs_connection_accept_fn(qb_ipcs_connection_t * c, uid_t uid, gid_t gid)
{
	return 0;
}

static void
storage_mon_ipcs_connection_created_fn(qb_ipcs_connection_t *c)
{
	struct qb_ipcs_stats srv_stats;

	qb_ipcs_stats_get(ipcs, &srv_stats, QB_FALSE);
	syslog(LOG_DEBUG, "Connection created (active:%d, closed:%d)",
		srv_stats.active_connections, srv_stats.closed_connections);
}

static void
storage_mon_ipcs_connection_destroyed_fn(qb_ipcs_connection_t *c)
{
	syslog(LOG_DEBUG, "Connection about to be freed");
}

static int32_t
storage_mon_ipcs_connection_closed_fn(qb_ipcs_connection_t *c)
{       
	struct qb_ipcs_connection_stats stats;
        struct qb_ipcs_stats srv_stats;

	qb_ipcs_stats_get(ipcs, &srv_stats, QB_FALSE);
        qb_ipcs_connection_stats_get(c, &stats, QB_FALSE);

	syslog(LOG_DEBUG,
		"Connection to pid:%d destroyed (active:%d, closed:%d)",
		stats.client_pid, srv_stats.active_connections,
		srv_stats.closed_connections);

	return 0;
}

static int32_t
storage_mon_ipcs_msg_process_fn(qb_ipcs_connection_t *c, void *data, size_t size)
{
	struct storage_mon_check_value_req *request;
	struct qb_ipc_response_header resps;
	ssize_t res;
	struct iovec iov[2];
	char resp[SMON_MAX_RESP_SIZE];
	int32_t rc;
	int send_score = response_final_score;

	request = (struct storage_mon_check_value_req *)data;
	syslog(LOG_DEBUG, "msg received (id:%d, size:%d, data:%s)",
		request->hdr.id, request->hdr.size, request->message);

	if (strcmp(request->message, SMON_GET_RESULT_COMMAND) != 0) {
		syslog(LOG_DEBUG, "request command is unknown.");
		send_score = -1;
	} else if (!daemon_check_first_all_devices) {
		send_score = -2;
	}

	resps.size = sizeof(struct qb_ipc_response_header);
	resps.id = 13;
	resps.error = 0;

	rc = snprintf(resp, SMON_MAX_RESP_SIZE, "%d", send_score) + 1;
	iov[0].iov_len = sizeof(resps);
	iov[0].iov_base = &resps;
	iov[1].iov_len = rc;
	iov[1].iov_base = resp;
	resps.size += rc;

	res = qb_ipcs_response_sendv(c, iov, 2);
	if (res < 0) {
		errno = -res;
		syslog(LOG_ERR, "qb_ipcs_response_send : errno = %d", errno);
	}
	return 0;
}

static int32_t
storage_mon_client(void)
{
	struct storage_mon_check_value_req request;
	struct storage_mon_check_value_res response;
	qb_ipcc_connection_t *conn;
	char ipcs_name[SMON_MAX_IPCSNAME];
	int32_t rc;


	snprintf(ipcs_name, SMON_MAX_IPCSNAME, "storage_mon_%s", attrname);
	conn = qb_ipcc_connect(ipcs_name, 0);
	if (conn == NULL) {
		syslog(LOG_ERR, "qb_ipcc_connect error\n");
		return(-1);
	}

	snprintf(request.message, SMON_MAX_MSGSIZE, "%s", SMON_GET_RESULT_COMMAND);
	request.hdr.id = 0;
	request.hdr.size = sizeof(struct storage_mon_check_value_req);
	rc = qb_ipcc_send(conn, &request, request.hdr.size);
	if (rc < 0) {
		syslog(LOG_ERR, "qb_ipcc_send error : %d\n", rc);
		return(-1);
	}
	if (rc > 0) {
		rc = qb_ipcc_recv(conn, &response, sizeof(response), -1);
		if (rc < 0) {
			syslog(LOG_ERR, "qb_ipcc_recv error : %d\n", rc);
			return(-1);
		}
	}

	qb_ipcc_disconnect(conn);

	/* Set score to result */
	/* 0			: Normal. 			*/
	/* greater than 0	: monitoring error. 		*/
	/* -1			: communication system error.	*/
	/* -2                   : Not all checks completed for first device in daemon mode. */ 
	rc = atoi(response.message);

	syslog(LOG_DEBUG, "daemon response[%d]: %s \n", response.hdr.id, response.message);

	return(rc);
}

static int32_t
storage_mon_daemon(int interval, const char *pidfile)
{
	int32_t rc;
	char ipcs_name[SMON_MAX_IPCSNAME];

	struct qb_ipcs_service_handlers service_handle = {
		.connection_accept = storage_mon_ipcs_connection_accept_fn,
		.connection_created = storage_mon_ipcs_connection_created_fn,
		.msg_process = storage_mon_ipcs_msg_process_fn,
		.connection_destroyed = storage_mon_ipcs_connection_destroyed_fn,
		.connection_closed = storage_mon_ipcs_connection_closed_fn,
	};

	struct qb_ipcs_poll_handlers poll_handle = {
		.job_add = storage_mon_job_add,
		.dispatch_add = storage_mon_dispatch_add,
		.dispatch_mod = storage_mon_dispatch_mod,
		.dispatch_del = storage_mon_dispatch_del,
	};

	if (daemon(0, 0) < 0) {
		syslog(LOG_ERR, "Failed to daemonize: %s", strerror(errno));
		return -1;
	}

	umask(S_IWGRP | S_IWOTH | S_IROTH);

	if (write_pid_file(pidfile) < 0) {
		return -1;
	}

	snprintf(ipcs_name, SMON_MAX_IPCSNAME, "storage_mon_%s", attrname);
	ipcs = qb_ipcs_create(ipcs_name, 0, QB_IPC_NATIVE, &service_handle);
	if (ipcs == 0) {
		syslog(LOG_ERR, "qb_ipcs_create");
		return -1;
	}

	qb_ipcs_enforce_buffer_size(ipcs, SMON_BUFF_1MEG);

	storage_mon_poll_handle = qb_loop_create();

	qb_ipcs_poll_handlers_set(ipcs, &poll_handle);
	rc = qb_ipcs_run(ipcs);
	if (rc != 0) {
		errno = -rc;
		syslog(LOG_ERR, "qb_ipcs_run");
		return -1;
	}

	qb_loop_signal_add(storage_mon_poll_handle, QB_LOOP_HIGH,
		SIGTERM, NULL, sigterm_handler, NULL);

	qb_loop_signal_add(storage_mon_poll_handle, QB_LOOP_MED,
		SIGCHLD, NULL, sigchld_handler, NULL);

	timer_d.interval = interval;
	qb_loop_timer_add(storage_mon_poll_handle, QB_LOOP_MED, 0, &timer_d, wrap_test_device_main, &timer_handle); 

	qb_loop_run(storage_mon_poll_handle);
	qb_loop_destroy(storage_mon_poll_handle);

	unlink(pidfile);

	return 0;
}

int main(int argc, char *argv[])
{
	size_t score_count = 0;
	int opt, option_index;
	int interval = DEFAULT_INTERVAL;
	const char *pidfile = DEFAULT_PIDFILE;
	gboolean client = FALSE;
	struct option long_options[] = {
		{"timeout", required_argument, 0, 't' },
		{"device",  required_argument, 0, 'd' },
		{"score",   required_argument, 0, 's' },
		{"inject-errors-percent",   required_argument, 0, 0 },
		{"daemonize", no_argument, 0, 0 },
		{"client", no_argument, 0, 0 },
		{"interval", required_argument, 0, 'i' },
		{"pidfile", required_argument, 0, 'p' },
		{"attrname", required_argument, 0, 'a' },
		{"verbose", no_argument, 0, 'v' },
		{"help",    no_argument, 0,       'h' },
		{0,         0,           0,        0  }
	};

	while ( (opt = getopt_long(argc, argv, "hvt:d:s:i:p:a:",
				   long_options, &option_index)) != -1 ) {
		switch (opt) {
			case 0: /* Long-only options */
				if (strcmp(long_options[option_index].name, "inject-errors-percent") == 0) {
					inject_error_percent = atoi(optarg);
					if (inject_error_percent < 1 || inject_error_percent > 100) {
						fprintf(stderr, "inject_error_percent should be between 1 and 100\n");
						return -1;
					}
				}
				if (strcmp(long_options[option_index].name, "daemonize") == 0) {
					daemonize = TRUE;
				}
				if (strcmp(long_options[option_index].name, "client") == 0) {
					client = TRUE;
				}
				if (daemonize && client) {
					fprintf(stderr,"The daemonize option and client option cannot be specified at the same time.");	
					return -1;
				}
				break;
			case 'd':
				if (device_count < MAX_DEVICES) {
					devices[device_count++] = strdup(optarg);
				} else {
					fprintf(stderr, "too many devices, max is %d\n", MAX_DEVICES);
					return -1;
				}
				break;
			case 's':
				if (score_count < MAX_DEVICES) {
					int score = atoi(optarg);
					if (score < 1 || score > 10) {
						fprintf(stderr, "Score must be between 1 and 10 inclusive\n");
						return -1;
					}
					scores[score_count++] = score;
				} else {
					fprintf(stderr, "too many scores, max is %d\n", MAX_DEVICES);
					return -1;
				}
				break;
			case 'v':
				verbose++;
				break;
			case 't':
				timeout = atoi(optarg);
				if (timeout < 1) {
					fprintf(stderr, "invalid timeout %d. Min 1, recommended %d (default)\n", timeout, DEFAULT_TIMEOUT);
					return -1;
				}
				break;
			case 'h':
				usage(argv[0], stdout);
				return 0;
				break;
			case 'i':
				interval = atoi(optarg);
				if (interval < 1) {
					fprintf(stderr, "invalid interval %d. Min 1, default is %d\n", interval, DEFAULT_INTERVAL);
					return -1;
				}
				break;
			case 'p':
				pidfile = strdup(optarg);
				if (pidfile == NULL) {
					fprintf(stderr, "Failed to duplicate string ['%s']\n", optarg);
					return -1;
				}
				break;
			case 'a':
				attrname = strdup(optarg);
				if (attrname == NULL) {
					fprintf(stderr, "Failed to duplicate string ['%s']\n", optarg);
					return -1;
				}
				break;
			default:
				usage(argv[0], stderr);
				return -1;
				break;
		}

	}

	if (client) {
		return(storage_mon_client());
	}

	if (device_count == 0) {
		fprintf(stderr, "No devices to test, use the -d  or --device argument\n");
		return -1;
	}

	if (device_count != score_count) {
		fprintf(stderr, "There must be the same number of devices and scores\n");
		return -1;
	}

	openlog("storage_mon", 0, LOG_DAEMON);

	if (!daemonize) {
		final_score = test_device_main(NULL);
	} else {
		return(storage_mon_daemon(interval, pidfile));
	}
	return final_score;
}