init.c revision b2c754d12177c6ef6f9ddfaa8d52663debdb0c1f 
1/*
2 * This file contains job initialization and setup functions.
3 */
4#include <stdio.h>
5#include <stdlib.h>
6#include <unistd.h>
7#include <fcntl.h>
8#include <ctype.h>
9#include <string.h>
10#include <errno.h>
11#include <getopt.h>
12#include <sys/ipc.h>
13#include <sys/shm.h>
14#include <sys/types.h>
15#include <sys/stat.h>
16
17#include "fio.h"
18#include "parse.h"
19#include "smalloc.h"
20#include "filehash.h"
21#include "verify.h"
22
23static char fio_version_string[] = "fio 1.34.2";
24
25#define FIO_RANDSEED		(0xb1899bedUL)
26
27static char **ini_file;
28static int max_jobs = MAX_JOBS;
29static int dump_cmdline;
30
31static struct thread_data def_thread;
32struct thread_data *threads = NULL;
33
34int exitall_on_terminate = 0;
35int terse_output = 0;
36int eta_print;
37unsigned long long mlock_size = 0;
38FILE *f_out = NULL;
39FILE *f_err = NULL;
40char *job_section = NULL;
41
42int write_bw_log = 0;
43int read_only = 0;
44
45static int def_timeout;
46static int write_lat_log;
47
48static int prev_group_jobs;
49
50unsigned long fio_debug = 0;
51unsigned int fio_debug_jobno = -1;
52unsigned int *fio_debug_jobp = NULL;
53
54/*
55 * Command line options. These will contain the above, plus a few
56 * extra that only pertain to fio itself and not jobs.
57 */
58static struct option l_opts[FIO_NR_OPTIONS] = {
59	{
60		.name		= "output",
61		.has_arg	= required_argument,
62		.val		= 'o',
63	},
64	{
65		.name		= "timeout",
66		.has_arg	= required_argument,
67		.val		= 't',
68	},
69	{
70		.name		= "latency-log",
71		.has_arg	= required_argument,
72		.val		= 'l',
73	},
74	{
75		.name		= "bandwidth-log",
76		.has_arg	= required_argument,
77		.val		= 'b',
78	},
79	{
80		.name		= "minimal",
81		.has_arg	= optional_argument,
82		.val		= 'm',
83	},
84	{
85		.name		= "version",
86		.has_arg	= no_argument,
87		.val		= 'v',
88	},
89	{
90		.name		= "help",
91		.has_arg	= no_argument,
92		.val		= 'h',
93	},
94	{
95		.name		= "cmdhelp",
96		.has_arg	= optional_argument,
97		.val		= 'c',
98	},
99	{
100		.name		= "showcmd",
101		.has_arg	= no_argument,
102		.val		= 's',
103	},
104	{
105		.name		= "readonly",
106		.has_arg	= no_argument,
107		.val		= 'r',
108	},
109	{
110		.name		= "eta",
111		.has_arg	= required_argument,
112		.val		= 'e',
113	},
114	{
115		.name		= "debug",
116		.has_arg	= required_argument,
117		.val		= 'd',
118	},
119	{
120		.name		= "section",
121		.has_arg	= required_argument,
122		.val		= 'x',
123	},
124	{
125		.name		= "alloc-size",
126		.has_arg	= required_argument,
127		.val		= 'a',
128	},
129	{
130		.name		= NULL,
131	},
132};
133
134FILE *get_f_out()
135{
136	return f_out;
137}
138
139FILE *get_f_err()
140{
141	return f_err;
142}
143
144/*
145 * Return a free job structure.
146 */
147static struct thread_data *get_new_job(int global, struct thread_data *parent)
148{
149	struct thread_data *td;
150
151	if (global)
152		return &def_thread;
153	if (thread_number >= max_jobs)
154		return NULL;
155
156	td = &threads[thread_number++];
157	*td = *parent;
158
159	dup_files(td, parent);
160	options_mem_dupe(td);
161
162	td->thread_number = thread_number;
163	return td;
164}
165
166static void put_job(struct thread_data *td)
167{
168	if (td == &def_thread)
169		return;
170
171	if (td->error)
172		log_info("fio: %s\n", td->verror);
173
174	memset(&threads[td->thread_number - 1], 0, sizeof(*td));
175	thread_number--;
176}
177
178static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
179{
180	unsigned int bs = td->o.min_bs[ddir];
181	unsigned long long rate;
182	unsigned long ios_per_msec;
183
184	if (td->o.rate[ddir]) {
185		rate = td->o.rate[ddir];
186		ios_per_msec = (rate * 1000LL) / bs;
187	} else
188		ios_per_msec = td->o.rate_iops[ddir] * 1000UL;
189
190	if (!ios_per_msec) {
191		log_err("rate lower than supported\n");
192		return -1;
193	}
194
195	td->rate_usec_cycle[ddir] = 1000000000ULL / ios_per_msec;
196	td->rate_pending_usleep[ddir] = 0;
197	return 0;
198}
199
200static int setup_rate(struct thread_data *td)
201{
202	int ret = 0;
203
204	if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
205		ret = __setup_rate(td, DDIR_READ);
206	if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
207		ret |= __setup_rate(td, DDIR_WRITE);
208
209	return ret;
210}
211
212static int fixed_block_size(struct thread_options *o)
213{
214	return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
215		o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
216		o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
217}
218
219/*
220 * Lazy way of fixing up options that depend on each other. We could also
221 * define option callback handlers, but this is easier.
222 */
223static int fixup_options(struct thread_data *td)
224{
225	struct thread_options *o = &td->o;
226
227#ifndef FIO_HAVE_PSHARED_MUTEX
228	if (!td->o.use_thread) {
229		log_info("fio: this platform does not support process shared"
230			 " mutexes, forcing use of threads. Use the 'thread'"
231			 " option to get rid of this warning.\n");
232		td->o.use_thread = 1;
233	}
234#endif
235
236	if (o->write_iolog_file && o->read_iolog_file) {
237		log_err("fio: read iolog overrides write_iolog\n");
238		free(o->write_iolog_file);
239		o->write_iolog_file = NULL;
240	}
241
242	/*
243	 * only really works for sequential io for now, and with 1 file
244	 */
245	if (o->zone_size && td_random(td) && o->open_files == 1)
246		o->zone_size = 0;
247
248	/*
249	 * Reads can do overwrites, we always need to pre-create the file
250	 */
251	if (td_read(td) || td_rw(td))
252		o->overwrite = 1;
253
254	if (!o->min_bs[DDIR_READ])
255		o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
256	if (!o->max_bs[DDIR_READ])
257		o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
258	if (!o->min_bs[DDIR_WRITE])
259		o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
260	if (!o->max_bs[DDIR_WRITE])
261		o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
262
263	o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
264
265	/*
266	 * For random IO, allow blockalign offset other than min_bs.
267	 */
268	if (!o->ba[DDIR_READ] || !td_random(td))
269		o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
270	if (!o->ba[DDIR_WRITE] || !td_random(td))
271		o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
272
273	if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
274	    o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
275	    !td->o.norandommap) {
276		log_err("fio: Any use of blockalign= turns off randommap\n");
277		td->o.norandommap = 1;
278	}
279
280	if (!o->file_size_high)
281		o->file_size_high = o->file_size_low;
282
283	if (o->norandommap && o->verify != VERIFY_NONE
284	    && !fixed_block_size(o))  {
285		log_err("fio: norandommap given for variable block sizes, "
286			"verify disabled\n");
287		o->verify = VERIFY_NONE;
288	}
289	if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
290		log_err("fio: bs_unaligned may not work with raw io\n");
291
292	/*
293	 * thinktime_spin must be less than thinktime
294	 */
295	if (o->thinktime_spin > o->thinktime)
296		o->thinktime_spin = o->thinktime;
297
298	/*
299	 * The low water mark cannot be bigger than the iodepth
300	 */
301	if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
302		/*
303		 * syslet work around - if the workload is sequential,
304		 * we want to let the queue drain all the way down to
305		 * avoid seeking between async threads
306		 */
307		if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
308			o->iodepth_low = 1;
309		else
310			o->iodepth_low = o->iodepth;
311	}
312
313	/*
314	 * If batch number isn't set, default to the same as iodepth
315	 */
316	if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
317		o->iodepth_batch = o->iodepth;
318
319	if (o->nr_files > td->files_index)
320		o->nr_files = td->files_index;
321
322	if (o->open_files > o->nr_files || !o->open_files)
323		o->open_files = o->nr_files;
324
325	if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
326	    ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
327		o->rate_iops_min[1]))) {
328		log_err("fio: rate and rate_iops are mutually exclusive\n");
329		return 1;
330	}
331	if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
332	    (o->rate_iops[0] < o->rate_iops_min[0]) ||
333	    (o->rate_iops[1] < o->rate_iops_min[1])) {
334		log_err("fio: minimum rate exceeds rate\n");
335		return 1;
336	}
337
338	if (!o->timeout && o->time_based) {
339		log_err("fio: time_based requires a runtime/timeout setting\n");
340		o->time_based = 0;
341	}
342
343	if (o->fill_device && !o->size)
344		o->size = -1ULL;
345
346	if (td_rw(td) && td->o.verify != VERIFY_NONE)
347		log_info("fio: mixed read/write workload with verify. May not "
348		 "work as expected, unless you pre-populated the file\n");
349
350	if (td->o.verify != VERIFY_NONE)
351		td->o.refill_buffers = 1;
352
353	if (td->o.pre_read) {
354		td->o.invalidate_cache = 0;
355		if (td->io_ops->flags & FIO_PIPEIO)
356			log_info("fio: cannot pre-read files with an IO engine"
357				 " that isn't seekable. Pre-read disabled.\n");
358	}
359
360	return 0;
361}
362
363/*
364 * This function leaks the buffer
365 */
366static char *to_kmg(unsigned int val)
367{
368	char *buf = malloc(32);
369	char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
370	char *p = post;
371
372	do {
373		if (val & 1023)
374			break;
375
376		val >>= 10;
377		p++;
378	} while (*p);
379
380	snprintf(buf, 31, "%u%c", val, *p);
381	return buf;
382}
383
384/* External engines are specified by "external:name.o") */
385static const char *get_engine_name(const char *str)
386{
387	char *p = strstr(str, ":");
388
389	if (!p)
390		return str;
391
392	p++;
393	strip_blank_front(&p);
394	strip_blank_end(p);
395	return p;
396}
397
398static int exists_and_not_file(const char *filename)
399{
400	struct stat sb;
401
402	if (lstat(filename, &sb) == -1)
403		return 0;
404
405	if (S_ISREG(sb.st_mode))
406		return 0;
407
408	return 1;
409}
410
411void td_fill_rand_seeds(struct thread_data *td)
412{
413	os_random_seed(td->rand_seeds[0], &td->bsrange_state);
414	os_random_seed(td->rand_seeds[1], &td->verify_state);
415	os_random_seed(td->rand_seeds[2], &td->rwmix_state);
416
417	if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
418		os_random_seed(td->rand_seeds[3], &td->next_file_state);
419
420	os_random_seed(td->rand_seeds[5], &td->file_size_state);
421
422	if (!td_random(td))
423		return;
424
425	if (td->o.rand_repeatable)
426		td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
427
428	os_random_seed(td->rand_seeds[4], &td->random_state);
429}
430
431/*
432 * Initialize the various random states we need (random io, block size ranges,
433 * read/write mix, etc).
434 */
435static int init_random_state(struct thread_data *td)
436{
437	int fd;
438
439	fd = open("/dev/urandom", O_RDONLY);
440	if (fd == -1) {
441		td_verror(td, errno, "open");
442		return 1;
443	}
444
445	if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
446	    (int) sizeof(td->rand_seeds)) {
447		td_verror(td, EIO, "read");
448		close(fd);
449		return 1;
450	}
451
452	close(fd);
453	td_fill_rand_seeds(td);
454	return 0;
455}
456
457/*
458 * Adds a job to the list of things todo. Sanitizes the various options
459 * to make sure we don't have conflicts, and initializes various
460 * members of td.
461 */
462static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
463{
464	const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
465				   "randread", "randwrite", "randrw" };
466	unsigned int i;
467	const char *engine;
468	char fname[PATH_MAX];
469	int numjobs, file_alloced;
470
471	/*
472	 * the def_thread is just for options, it's not a real job
473	 */
474	if (td == &def_thread)
475		return 0;
476
477	/*
478	 * if we are just dumping the output command line, don't add the job
479	 */
480	if (dump_cmdline) {
481		put_job(td);
482		return 0;
483	}
484
485	engine = get_engine_name(td->o.ioengine);
486	td->io_ops = load_ioengine(td, engine);
487	if (!td->io_ops) {
488		log_err("fio: failed to load engine %s\n", engine);
489		goto err;
490	}
491
492	if (td->o.use_thread)
493		nr_thread++;
494	else
495		nr_process++;
496
497	if (td->o.odirect)
498		td->io_ops->flags |= FIO_RAWIO;
499
500	file_alloced = 0;
501	if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
502		file_alloced = 1;
503
504		if (td->o.nr_files == 1 && exists_and_not_file(jobname))
505			add_file(td, jobname);
506		else {
507			for (i = 0; i < td->o.nr_files; i++) {
508				sprintf(fname, "%s.%d.%d", jobname,
509							td->thread_number, i);
510				add_file(td, fname);
511			}
512		}
513	}
514
515	if (fixup_options(td))
516		goto err;
517
518	if (td->io_ops->flags & FIO_DISKLESSIO) {
519		struct fio_file *f;
520
521		for_each_file(td, f, i)
522			f->real_file_size = -1ULL;
523	}
524
525	td->mutex = fio_mutex_init(0);
526
527	td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
528	td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
529	td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
530	td->ddir_nr = td->o.ddir_nr;
531
532	if ((td->o.stonewall || td->o.new_group) && prev_group_jobs) {
533		prev_group_jobs = 0;
534		groupid++;
535	}
536
537	td->groupid = groupid;
538	prev_group_jobs++;
539
540	if (init_random_state(td))
541		goto err;
542
543	if (setup_rate(td))
544		goto err;
545
546	if (td->o.write_lat_log) {
547		setup_log(&td->ts.slat_log);
548		setup_log(&td->ts.clat_log);
549	}
550	if (td->o.write_bw_log)
551		setup_log(&td->ts.bw_log);
552
553	if (!td->o.name)
554		td->o.name = strdup(jobname);
555
556	if (!terse_output) {
557		if (!job_add_num) {
558			if (!strcmp(td->io_ops->name, "cpuio")) {
559				log_info("%s: ioengine=cpu, cpuload=%u,"
560					 " cpucycle=%u\n", td->o.name,
561							td->o.cpuload,
562							td->o.cpucycle);
563			} else {
564				char *c1, *c2, *c3, *c4;
565
566				c1 = to_kmg(td->o.min_bs[DDIR_READ]);
567				c2 = to_kmg(td->o.max_bs[DDIR_READ]);
568				c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
569				c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
570
571				log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
572					 " ioengine=%s, iodepth=%u\n",
573						td->o.name, td->groupid,
574						ddir_str[td->o.td_ddir],
575						c1, c2, c3, c4,
576						td->io_ops->name,
577						td->o.iodepth);
578
579				free(c1);
580				free(c2);
581				free(c3);
582				free(c4);
583			}
584		} else if (job_add_num == 1)
585			log_info("...\n");
586	}
587
588	/*
589	 * recurse add identical jobs, clear numjobs and stonewall options
590	 * as they don't apply to sub-jobs
591	 */
592	numjobs = td->o.numjobs;
593	while (--numjobs) {
594		struct thread_data *td_new = get_new_job(0, td);
595
596		if (!td_new)
597			goto err;
598
599		td_new->o.numjobs = 1;
600		td_new->o.stonewall = 0;
601		td_new->o.new_group = 0;
602
603		if (file_alloced) {
604			td_new->o.filename = NULL;
605			td_new->files_index = 0;
606			td_new->files_size = 0;
607			td_new->files = NULL;
608		}
609
610		job_add_num = numjobs - 1;
611
612		if (add_job(td_new, jobname, job_add_num))
613			goto err;
614	}
615
616	return 0;
617err:
618	put_job(td);
619	return -1;
620}
621
622static int skip_this_section(const char *name)
623{
624	if (!job_section)
625		return 0;
626	if (!strncmp(name, "global", 6))
627		return 0;
628
629	return strcmp(job_section, name);
630}
631
632static int is_empty_or_comment(char *line)
633{
634	unsigned int i;
635
636	for (i = 0; i < strlen(line); i++) {
637		if (line[i] == ';')
638			return 1;
639		if (line[i] == '#')
640			return 1;
641		if (!isspace(line[i]) && !iscntrl(line[i]))
642			return 0;
643	}
644
645	return 1;
646}
647
648/*
649 * This is our [ini] type file parser.
650 */
651static int parse_jobs_ini(char *file, int stonewall_flag)
652{
653	unsigned int global;
654	struct thread_data *td;
655	char *string, *name;
656	FILE *f;
657	char *p;
658	int ret = 0, stonewall;
659	int first_sect = 1;
660	int skip_fgets = 0;
661	int inside_skip = 0;
662	char **opts;
663	int i, alloc_opts, num_opts;
664
665	if (!strcmp(file, "-"))
666		f = stdin;
667	else
668		f = fopen(file, "r");
669
670	if (!f) {
671		perror("fopen job file");
672		return 1;
673	}
674
675	string = malloc(4096);
676
677	/*
678	 * it's really 256 + small bit, 280 should suffice
679	 */
680	name = malloc(280);
681	memset(name, 0, 280);
682
683	alloc_opts = 8;
684	opts = malloc(sizeof(char *) * alloc_opts);
685	num_opts = 0;
686
687	stonewall = stonewall_flag;
688	do {
689		/*
690		 * if skip_fgets is set, we already have loaded a line we
691		 * haven't handled.
692		 */
693		if (!skip_fgets) {
694			p = fgets(string, 4095, f);
695			if (!p)
696				break;
697		}
698
699		skip_fgets = 0;
700		strip_blank_front(&p);
701		strip_blank_end(p);
702
703		if (is_empty_or_comment(p))
704			continue;
705		if (sscanf(p, "[%255s]", name) != 1) {
706			if (inside_skip)
707				continue;
708			log_err("fio: option <%s> outside of [] job section\n",
709									p);
710			break;
711		}
712
713		if (skip_this_section(name)) {
714			inside_skip = 1;
715			continue;
716		} else
717			inside_skip = 0;
718
719		global = !strncmp(name, "global", 6);
720
721		name[strlen(name) - 1] = '\0';
722
723		if (dump_cmdline) {
724			if (first_sect)
725				log_info("fio ");
726			if (!global)
727				log_info("--name=%s ", name);
728			first_sect = 0;
729		}
730
731		td = get_new_job(global, &def_thread);
732		if (!td) {
733			ret = 1;
734			break;
735		}
736
737		/*
738		 * Seperate multiple job files by a stonewall
739		 */
740		if (!global && stonewall) {
741			td->o.stonewall = stonewall;
742			stonewall = 0;
743		}
744
745		num_opts = 0;
746		memset(opts, 0, alloc_opts * sizeof(char *));
747
748		while ((p = fgets(string, 4096, f)) != NULL) {
749			if (is_empty_or_comment(p))
750				continue;
751
752			strip_blank_front(&p);
753
754			/*
755			 * new section, break out and make sure we don't
756			 * fgets() a new line at the top.
757			 */
758			if (p[0] == '[') {
759				skip_fgets = 1;
760				break;
761			}
762
763			strip_blank_end(p);
764
765			if (num_opts == alloc_opts) {
766				alloc_opts <<= 1;
767				opts = realloc(opts,
768						alloc_opts * sizeof(char *));
769			}
770
771			opts[num_opts] = strdup(p);
772			num_opts++;
773		}
774
775		ret = fio_options_parse(td, opts, num_opts);
776		if (!ret) {
777			if (dump_cmdline)
778				for (i = 0; i < num_opts; i++)
779					log_info("--%s ", opts[i]);
780
781			ret = add_job(td, name, 0);
782		} else {
783			log_err("fio: job %s dropped\n", name);
784			put_job(td);
785		}
786
787		for (i = 0; i < num_opts; i++)
788			free(opts[i]);
789		num_opts = 0;
790	} while (!ret);
791
792	if (dump_cmdline)
793		log_info("\n");
794
795	for (i = 0; i < num_opts; i++)
796		free(opts[i]);
797
798	free(string);
799	free(name);
800	free(opts);
801	if (f != stdin)
802		fclose(f);
803	return ret;
804}
805
806static int fill_def_thread(void)
807{
808	memset(&def_thread, 0, sizeof(def_thread));
809
810	fio_getaffinity(getpid(), &def_thread.o.cpumask);
811
812	/*
813	 * fill default options
814	 */
815	fio_fill_default_options(&def_thread);
816
817	def_thread.o.timeout = def_timeout;
818	def_thread.o.write_bw_log = write_bw_log;
819	def_thread.o.write_lat_log = write_lat_log;
820
821	return 0;
822}
823
824static void free_shm(void)
825{
826	struct shmid_ds sbuf;
827
828	if (threads) {
829		void *tp = threads;
830
831		threads = NULL;
832		file_hash_exit();
833		fio_debug_jobp = NULL;
834		shmdt(tp);
835		shmctl(shm_id, IPC_RMID, &sbuf);
836	}
837
838	scleanup();
839}
840
841/*
842 * The thread area is shared between the main process and the job
843 * threads/processes. So setup a shared memory segment that will hold
844 * all the job info. We use the end of the region for keeping track of
845 * open files across jobs, for file sharing.
846 */
847static int setup_thread_area(void)
848{
849	void *hash;
850
851	/*
852	 * 1024 is too much on some machines, scale max_jobs if
853	 * we get a failure that looks like too large a shm segment
854	 */
855	do {
856		size_t size = max_jobs * sizeof(struct thread_data);
857
858		size += file_hash_size;
859		size += sizeof(unsigned int);
860
861		shm_id = shmget(0, size, IPC_CREAT | 0600);
862		if (shm_id != -1)
863			break;
864		if (errno != EINVAL) {
865			perror("shmget");
866			break;
867		}
868
869		max_jobs >>= 1;
870	} while (max_jobs);
871
872	if (shm_id == -1)
873		return 1;
874
875	threads = shmat(shm_id, NULL, 0);
876	if (threads == (void *) -1) {
877		perror("shmat");
878		return 1;
879	}
880
881	memset(threads, 0, max_jobs * sizeof(struct thread_data));
882	hash = (void *) threads + max_jobs * sizeof(struct thread_data);
883	fio_debug_jobp = (void *) hash + file_hash_size;
884	*fio_debug_jobp = -1;
885	file_hash_init(hash);
886	atexit(free_shm);
887	return 0;
888}
889
890static void usage(const char *name)
891{
892	printf("%s\n", fio_version_string);
893	printf("%s [options] [job options] <job file(s)>\n", name);
894	printf("\t--debug=options\tEnable debug logging\n");
895	printf("\t--output\tWrite output to file\n");
896	printf("\t--timeout\tRuntime in seconds\n");
897	printf("\t--latency-log\tGenerate per-job latency logs\n");
898	printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
899	printf("\t--minimal\tMinimal (terse) output\n");
900	printf("\t--version\tPrint version info and exit\n");
901	printf("\t--help\t\tPrint this page\n");
902	printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
903		" them\n");
904	printf("\t--showcmd\tTurn a job file into command line options\n");
905	printf("\t--eta=when\tWhen ETA estimate should be printed\n");
906	printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
907	printf("\t--readonly\tTurn on safety read-only checks, preventing"
908		" writes\n");
909	printf("\t--section=name\tOnly run specified section in job file\n");
910	printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
911		" (def 1024)\n");
912	printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>\n");
913}
914
915#ifdef FIO_INC_DEBUG
916struct debug_level debug_levels[] = {
917	{ .name = "process",	.shift = FD_PROCESS, },
918	{ .name = "file",	.shift = FD_FILE, },
919	{ .name = "io",		.shift = FD_IO, },
920	{ .name = "mem",	.shift = FD_MEM, },
921	{ .name = "blktrace",	.shift = FD_BLKTRACE },
922	{ .name = "verify",	.shift = FD_VERIFY },
923	{ .name = "random",	.shift = FD_RANDOM },
924	{ .name = "parse",	.shift = FD_PARSE },
925	{ .name = "diskutil",	.shift = FD_DISKUTIL },
926	{ .name = "job",	.shift = FD_JOB },
927	{ .name = "mutex",	.shift = FD_MUTEX },
928	{ .name = NULL, },
929};
930
931static int set_debug(const char *string)
932{
933	struct debug_level *dl;
934	char *p = (char *) string;
935	char *opt;
936	int i;
937
938	if (!strcmp(string, "?") || !strcmp(string, "help")) {
939		int i;
940
941		log_info("fio: dumping debug options:");
942		for (i = 0; debug_levels[i].name; i++) {
943			dl = &debug_levels[i];
944			log_info("%s,", dl->name);
945		}
946		log_info("all\n");
947		return 1;
948	}
949
950	while ((opt = strsep(&p, ",")) != NULL) {
951		int found = 0;
952
953		if (!strncmp(opt, "all", 3)) {
954			log_info("fio: set all debug options\n");
955			fio_debug = ~0UL;
956			continue;
957		}
958
959		for (i = 0; debug_levels[i].name; i++) {
960			dl = &debug_levels[i];
961			found = !strncmp(opt, dl->name, strlen(dl->name));
962			if (!found)
963				continue;
964
965			if (dl->shift == FD_JOB) {
966				opt = strchr(opt, ':');
967				if (!opt) {
968					log_err("fio: missing job number\n");
969					break;
970				}
971				opt++;
972				fio_debug_jobno = atoi(opt);
973				log_info("fio: set debug jobno %d\n",
974							fio_debug_jobno);
975			} else {
976				log_info("fio: set debug option %s\n", opt);
977				fio_debug |= (1UL << dl->shift);
978			}
979			break;
980		}
981
982		if (!found)
983			log_err("fio: debug mask %s not found\n", opt);
984	}
985	return 0;
986}
987#else
988static int set_debug(const char *string)
989{
990	log_err("fio: debug tracing not included in build\n");
991	return 1;
992}
993#endif
994
995static int parse_cmd_line(int argc, char *argv[])
996{
997	struct thread_data *td = NULL;
998	int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
999
1000	while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1001		switch (c) {
1002		case 'a':
1003			smalloc_pool_size = atoi(optarg);
1004			break;
1005		case 't':
1006			def_timeout = atoi(optarg);
1007			break;
1008		case 'l':
1009			write_lat_log = 1;
1010			break;
1011		case 'w':
1012			write_bw_log = 1;
1013			break;
1014		case 'o':
1015			f_out = fopen(optarg, "w+");
1016			if (!f_out) {
1017				perror("fopen output");
1018				exit(1);
1019			}
1020			f_err = f_out;
1021			break;
1022		case 'm':
1023			terse_output = 1;
1024			break;
1025		case 'h':
1026			usage(argv[0]);
1027			exit(0);
1028		case 'c':
1029			exit(fio_show_option_help(optarg));
1030		case 's':
1031			dump_cmdline = 1;
1032			break;
1033		case 'r':
1034			read_only = 1;
1035			break;
1036		case 'v':
1037			printf("%s\n", fio_version_string);
1038			exit(0);
1039		case 'e':
1040			if (!strcmp("always", optarg))
1041				eta_print = FIO_ETA_ALWAYS;
1042			else if (!strcmp("never", optarg))
1043				eta_print = FIO_ETA_NEVER;
1044			break;
1045		case 'd':
1046			if (set_debug(optarg))
1047				do_exit++;
1048			break;
1049		case 'x':
1050			if (!strcmp(optarg, "global")) {
1051				log_err("fio: can't use global as only "
1052					"section\n");
1053				do_exit++;
1054				exit_val = 1;
1055				break;
1056			}
1057			if (job_section)
1058				free(job_section);
1059			job_section = strdup(optarg);
1060			break;
1061		case FIO_GETOPT_JOB: {
1062			const char *opt = l_opts[lidx].name;
1063			char *val = optarg;
1064
1065			if (!strncmp(opt, "name", 4) && td) {
1066				ret = add_job(td, td->o.name ?: "fio", 0);
1067				if (ret) {
1068					put_job(td);
1069					return 0;
1070				}
1071				td = NULL;
1072			}
1073			if (!td) {
1074				int is_section = !strncmp(opt, "name", 4);
1075				int global = 0;
1076
1077				if (!is_section || !strncmp(val, "global", 6))
1078					global = 1;
1079
1080				if (is_section && skip_this_section(val))
1081					continue;
1082
1083				td = get_new_job(global, &def_thread);
1084				if (!td)
1085					return 0;
1086			}
1087
1088			ret = fio_cmd_option_parse(td, opt, val);
1089			break;
1090		}
1091		default:
1092			do_exit++;
1093			exit_val = 1;
1094			break;
1095		}
1096	}
1097
1098	if (do_exit)
1099		exit(exit_val);
1100
1101	if (td) {
1102		if (!ret)
1103			ret = add_job(td, td->o.name ?: "fio", 0);
1104		if (ret)
1105			put_job(td);
1106	}
1107
1108	while (optind < argc) {
1109		ini_idx++;
1110		ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1111		ini_file[ini_idx - 1] = strdup(argv[optind]);
1112		optind++;
1113	}
1114
1115	return ini_idx;
1116}
1117
1118int parse_options(int argc, char *argv[])
1119{
1120	int job_files, i;
1121
1122	f_out = stdout;
1123	f_err = stderr;
1124
1125	fio_options_dup_and_init(l_opts);
1126
1127	if (setup_thread_area())
1128		return 1;
1129	if (fill_def_thread())
1130		return 1;
1131
1132	job_files = parse_cmd_line(argc, argv);
1133
1134	for (i = 0; i < job_files; i++) {
1135		if (fill_def_thread())
1136			return 1;
1137		if (parse_jobs_ini(ini_file[i], i))
1138			return 1;
1139		free(ini_file[i]);
1140	}
1141
1142	free(ini_file);
1143	options_mem_free(&def_thread);
1144
1145	if (!thread_number) {
1146		if (dump_cmdline)
1147			return 0;
1148
1149		log_err("No jobs defined(s)\n\n");
1150		usage(argv[0]);
1151		return 1;
1152	}
1153
1154	if (def_thread.o.gtod_offload) {
1155		fio_gtod_init();
1156		fio_gtod_offload = 1;
1157		fio_gtod_cpu = def_thread.o.gtod_cpu;
1158	}
1159
1160	return 0;
1161}
1162