08429c4b027b53e2b1c18b017d28e89c267145b2
[fio.git] / init.c
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
22 static char fio_version_string[] = "fio 1.22-rc2";
23
24 #define FIO_RANDSEED            (0xb1899bedUL)
25
26 static char **ini_file;
27 static int max_jobs = MAX_JOBS;
28 static int dump_cmdline;
29
30 struct thread_data def_thread;
31 struct thread_data *threads = NULL;
32
33 int exitall_on_terminate = 0;
34 int terse_output = 0;
35 int eta_print;
36 unsigned long long mlock_size = 0;
37 FILE *f_out = NULL;
38 FILE *f_err = NULL;
39 char *job_section = NULL;
40
41 int write_bw_log = 0;
42 int read_only = 0;
43
44 static int def_timeout;
45 static int write_lat_log;
46
47 static int prev_group_jobs;
48
49 unsigned long fio_debug = 0;
50 unsigned int fio_debug_jobno = -1;
51 unsigned int *fio_debug_jobp = NULL;
52
53 /*
54  * Command line options. These will contain the above, plus a few
55  * extra that only pertain to fio itself and not jobs.
56  */
57 static struct option l_opts[FIO_NR_OPTIONS] = {
58         {
59                 .name           = "output",
60                 .has_arg        = required_argument,
61                 .val            = 'o',
62         },
63         {
64                 .name           = "timeout",
65                 .has_arg        = required_argument,
66                 .val            = 't',
67         },
68         {
69                 .name           = "latency-log",
70                 .has_arg        = required_argument,
71                 .val            = 'l',
72         },
73         {
74                 .name           = "bandwidth-log",
75                 .has_arg        = required_argument,
76                 .val            = 'b',
77         },
78         {
79                 .name           = "minimal",
80                 .has_arg        = optional_argument,
81                 .val            = 'm',
82         },
83         {
84                 .name           = "version",
85                 .has_arg        = no_argument,
86                 .val            = 'v',
87         },
88         {
89                 .name           = "help",
90                 .has_arg        = no_argument,
91                 .val            = 'h',
92         },
93         {
94                 .name           = "cmdhelp",
95                 .has_arg        = optional_argument,
96                 .val            = 'c',
97         },
98         {
99                 .name           = "showcmd",
100                 .has_arg        = no_argument,
101                 .val            = 's',
102         },
103         {
104                 .name           = "readonly",
105                 .has_arg        = no_argument,
106                 .val            = 'r',
107         },
108         {
109                 .name           = "eta",
110                 .has_arg        = required_argument,
111                 .val            = 'e',
112         },
113         {
114                 .name           = "debug",
115                 .has_arg        = required_argument,
116                 .val            = 'd',
117         },
118         {
119                 .name           = "section",
120                 .has_arg        = required_argument,
121                 .val            = 'x',
122         },
123         {
124                 .name           = "alloc-size",
125                 .has_arg        = required_argument,
126                 .val            = 'a',
127         },
128         {
129                 .name           = NULL,
130         },
131 };
132
133 FILE *get_f_out()
134 {
135         return f_out;
136 }
137
138 FILE *get_f_err()
139 {
140         return f_err;
141 }
142
143 /*
144  * Return a free job structure.
145  */
146 static struct thread_data *get_new_job(int global, struct thread_data *parent)
147 {
148         struct thread_data *td;
149
150         if (global)
151                 return &def_thread;
152         if (thread_number >= max_jobs)
153                 return NULL;
154
155         td = &threads[thread_number++];
156         *td = *parent;
157
158         dup_files(td, parent);
159         options_mem_dupe(td);
160
161         td->thread_number = thread_number;
162         return td;
163 }
164
165 static void put_job(struct thread_data *td)
166 {
167         if (td == &def_thread)
168                 return;
169
170         if (td->error)
171                 log_info("fio: %s\n", td->verror);
172
173         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
174         thread_number--;
175 }
176
177 static int setup_rate(struct thread_data *td)
178 {
179         unsigned long nr_reads_per_msec;
180         unsigned long long rate;
181         unsigned int bs;
182
183         if (!td->o.rate && !td->o.rate_iops)
184                 return 0;
185
186         if (td_rw(td))
187                 bs = td->o.rw_min_bs;
188         else if (td_read(td))
189                 bs = td->o.min_bs[DDIR_READ];
190         else
191                 bs = td->o.min_bs[DDIR_WRITE];
192
193         if (td->o.rate) {
194                 rate = td->o.rate;
195                 nr_reads_per_msec = (rate * 1024 * 1000LL) / bs;
196         } else
197                 nr_reads_per_msec = td->o.rate_iops * 1000UL;
198
199         if (!nr_reads_per_msec) {
200                 log_err("rate lower than supported\n");
201                 return -1;
202         }
203
204         td->rate_usec_cycle = 1000000000ULL / nr_reads_per_msec;
205         td->rate_pending_usleep = 0;
206         return 0;
207 }
208
209 /*
210  * Lazy way of fixing up options that depend on each other. We could also
211  * define option callback handlers, but this is easier.
212  */
213 static int fixup_options(struct thread_data *td)
214 {
215         struct thread_options *o = &td->o;
216
217         if (read_only && td_write(td)) {
218                 log_err("fio: job <%s> has write bit set, but fio is in"
219                         " read-only mode\n", td->o.name);
220                 return 1;
221         }
222
223         if (o->write_iolog_file && o->read_iolog_file) {
224                 log_err("fio: read iolog overrides write_iolog\n");
225                 free(o->write_iolog_file);
226                 o->write_iolog_file = NULL;
227         }
228
229         /*
230          * only really works for sequential io for now, and with 1 file
231          */
232         if (o->zone_size && td_random(td) && o->open_files == 1)
233                 o->zone_size = 0;
234
235         /*
236          * Reads can do overwrites, we always need to pre-create the file
237          */
238         if (td_read(td) || td_rw(td))
239                 o->overwrite = 1;
240
241         if (!o->min_bs[DDIR_READ])
242                 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
243         if (!o->max_bs[DDIR_READ])
244                 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
245         if (!o->min_bs[DDIR_WRITE])
246                 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
247         if (!o->max_bs[DDIR_WRITE])
248                 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
249
250         o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
251
252         if (!o->file_size_high)
253                 o->file_size_high = o->file_size_low;
254
255         if (o->norandommap && o->verify != VERIFY_NONE) {
256                 log_err("fio: norandommap given, verify disabled\n");
257                 o->verify = VERIFY_NONE;
258         }
259         if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
260                 log_err("fio: bs_unaligned may not work with raw io\n");
261
262         /*
263          * thinktime_spin must be less than thinktime
264          */
265         if (o->thinktime_spin > o->thinktime)
266                 o->thinktime_spin = o->thinktime;
267
268         /*
269          * The low water mark cannot be bigger than the iodepth
270          */
271         if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
272                 /*
273                  * syslet work around - if the workload is sequential,
274                  * we want to let the queue drain all the way down to
275                  * avoid seeking between async threads
276                  */
277                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
278                         o->iodepth_low = 1;
279                 else
280                         o->iodepth_low = o->iodepth;
281         }
282
283         /*
284          * If batch number isn't set, default to the same as iodepth
285          */
286         if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
287                 o->iodepth_batch = o->iodepth;
288
289         if (o->nr_files > td->files_index)
290                 o->nr_files = td->files_index;
291
292         if (o->open_files > o->nr_files || !o->open_files)
293                 o->open_files = o->nr_files;
294
295         if ((o->rate && o->rate_iops) || (o->ratemin && o->rate_iops_min)) {
296                 log_err("fio: rate and rate_iops are mutually exclusive\n");
297                 return 1;
298         }
299         if ((o->rate < o->ratemin) || (o->rate_iops < o->rate_iops_min)) {
300                 log_err("fio: minimum rate exceeds rate\n");
301                 return 1;
302         }
303
304         if (!o->timeout && o->time_based) {
305                 log_err("fio: time_based requires a runtime/timeout setting\n");
306                 o->time_based = 0;
307         }
308
309         if (o->fill_device && !o->size)
310                 o->size = -1ULL;
311
312         if (td_rw(td) && td->o.verify != VERIFY_NONE)
313                 log_info("fio: mixed read/write workload with verify. May not "
314                  "work as expected, unless you pre-populated the file\n");
315
316         if (td->o.verify != VERIFY_NONE)
317                 td->o.refill_buffers = 1;
318
319         return 0;
320 }
321
322 /*
323  * This function leaks the buffer
324  */
325 static char *to_kmg(unsigned int val)
326 {
327         char *buf = malloc(32);
328         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
329         char *p = post;
330
331         do {
332                 if (val & 1023)
333                         break;
334
335                 val >>= 10;
336                 p++;
337         } while (*p);
338
339         snprintf(buf, 31, "%u%c", val, *p);
340         return buf;
341 }
342
343 /* External engines are specified by "external:name.o") */
344 static const char *get_engine_name(const char *str)
345 {
346         char *p = strstr(str, ":");
347
348         if (!p)
349                 return str;
350
351         p++;
352         strip_blank_front(&p);
353         strip_blank_end(p);
354         return p;
355 }
356
357 static int exists_and_not_file(const char *filename)
358 {
359         struct stat sb;
360
361         if (lstat(filename, &sb) == -1)
362                 return 0;
363
364         if (S_ISREG(sb.st_mode))
365                 return 0;
366
367         return 1;
368 }
369
370 /*
371  * Initialize the various random states we need (random io, block size ranges,
372  * read/write mix, etc).
373  */
374 static int init_random_state(struct thread_data *td)
375 {
376         unsigned long seeds[6];
377         int fd;
378
379         fd = open("/dev/urandom", O_RDONLY);
380         if (fd == -1) {
381                 td_verror(td, errno, "open");
382                 return 1;
383         }
384
385         if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
386                 td_verror(td, EIO, "read");
387                 close(fd);
388                 return 1;
389         }
390
391         close(fd);
392
393         os_random_seed(seeds[0], &td->bsrange_state);
394         os_random_seed(seeds[1], &td->verify_state);
395         os_random_seed(seeds[2], &td->rwmix_state);
396
397         if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
398                 os_random_seed(seeds[3], &td->next_file_state);
399
400         os_random_seed(seeds[5], &td->file_size_state);
401
402         if (!td_random(td))
403                 return 0;
404
405         if (td->o.rand_repeatable)
406                 seeds[4] = FIO_RANDSEED * td->thread_number;
407
408         os_random_seed(seeds[4], &td->random_state);
409         return 0;
410 }
411
412 /*
413  * Adds a job to the list of things todo. Sanitizes the various options
414  * to make sure we don't have conflicts, and initializes various
415  * members of td.
416  */
417 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
418 {
419         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
420                                    "randread", "randwrite", "randrw" };
421         unsigned int i;
422         const char *engine;
423         char fname[PATH_MAX];
424         int numjobs, file_alloced;
425
426         /*
427          * the def_thread is just for options, it's not a real job
428          */
429         if (td == &def_thread)
430                 return 0;
431
432         /*
433          * if we are just dumping the output command line, don't add the job
434          */
435         if (dump_cmdline) {
436                 put_job(td);
437                 return 0;
438         }
439
440         engine = get_engine_name(td->o.ioengine);
441         td->io_ops = load_ioengine(td, engine);
442         if (!td->io_ops) {
443                 log_err("fio: failed to load engine %s\n", engine);
444                 goto err;
445         }
446
447         if (td->o.use_thread)
448                 nr_thread++;
449         else
450                 nr_process++;
451
452         if (td->o.odirect)
453                 td->io_ops->flags |= FIO_RAWIO;
454
455         file_alloced = 0;
456         if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
457                 file_alloced = 1;
458
459                 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
460                         add_file(td, jobname);
461                 else {
462                         for (i = 0; i < td->o.nr_files; i++) {
463                                 sprintf(fname, "%s.%d.%d", jobname,
464                                                         td->thread_number, i);
465                                 add_file(td, fname);
466                         }
467                 }
468         }
469
470         if (fixup_options(td))
471                 goto err;
472
473         if (td->io_ops->flags & FIO_DISKLESSIO) {
474                 struct fio_file *f;
475
476                 for_each_file(td, f, i)
477                         f->real_file_size = -1ULL;
478         }
479
480         td->mutex = fio_mutex_init(0);
481
482         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
483         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
484         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
485         td->ddir_nr = td->o.ddir_nr;
486
487         if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
488              && prev_group_jobs) {
489                 prev_group_jobs = 0;
490                 groupid++;
491         }
492
493         td->groupid = groupid;
494         prev_group_jobs++;
495
496         if (init_random_state(td))
497                 goto err;
498
499         if (setup_rate(td))
500                 goto err;
501
502         if (td->o.write_lat_log) {
503                 setup_log(&td->ts.slat_log);
504                 setup_log(&td->ts.clat_log);
505         }
506         if (td->o.write_bw_log)
507                 setup_log(&td->ts.bw_log);
508
509         if (!td->o.name)
510                 td->o.name = strdup(jobname);
511
512         if (!terse_output) {
513                 if (!job_add_num) {
514                         if (!strcmp(td->io_ops->name, "cpuio")) {
515                                 log_info("%s: ioengine=cpu, cpuload=%u,"
516                                          " cpucycle=%u\n", td->o.name,
517                                                         td->o.cpuload,
518                                                         td->o.cpucycle);
519                         } else {
520                                 char *c1, *c2, *c3, *c4;
521
522                                 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
523                                 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
524                                 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
525                                 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
526
527                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
528                                          " ioengine=%s, iodepth=%u\n",
529                                                 td->o.name, td->groupid,
530                                                 ddir_str[td->o.td_ddir],
531                                                 c1, c2, c3, c4,
532                                                 td->io_ops->name,
533                                                 td->o.iodepth);
534
535                                 free(c1);
536                                 free(c2);
537                                 free(c3);
538                                 free(c4);
539                         }
540                 } else if (job_add_num == 1)
541                         log_info("...\n");
542         }
543
544         /*
545          * recurse add identical jobs, clear numjobs and stonewall options
546          * as they don't apply to sub-jobs
547          */
548         numjobs = td->o.numjobs;
549         while (--numjobs) {
550                 struct thread_data *td_new = get_new_job(0, td);
551
552                 if (!td_new)
553                         goto err;
554
555                 td_new->o.numjobs = 1;
556                 td_new->o.stonewall = 0;
557                 td_new->o.new_group = 0;
558
559                 if (file_alloced) {
560                         td_new->o.filename = NULL;
561                         td_new->files_index = 0;
562                         td_new->files = NULL;
563                 }
564
565                 job_add_num = numjobs - 1;
566
567                 if (add_job(td_new, jobname, job_add_num))
568                         goto err;
569         }
570
571         return 0;
572 err:
573         put_job(td);
574         return -1;
575 }
576
577 static int skip_this_section(const char *name)
578 {
579         if (!job_section)
580                 return 0;
581         if (!strncmp(name, "global", 6))
582                 return 0;
583
584         return strncmp(job_section, name, strlen(job_section));
585 }
586
587 static int is_empty_or_comment(char *line)
588 {
589         unsigned int i;
590
591         for (i = 0; i < strlen(line); i++) {
592                 if (line[i] == ';')
593                         return 1;
594                 if (line[i] == '#')
595                         return 1;
596                 if (!isspace(line[i]) && !iscntrl(line[i]))
597                         return 0;
598         }
599
600         return 1;
601 }
602
603 /*
604  * This is our [ini] type file parser.
605  */
606 static int parse_jobs_ini(char *file, int stonewall_flag)
607 {
608         unsigned int global;
609         struct thread_data *td;
610         char *string, *name;
611         FILE *f;
612         char *p;
613         int ret = 0, stonewall;
614         int first_sect = 1;
615         int skip_fgets = 0;
616         int inside_skip = 0;
617         char **opts;
618         int i, alloc_opts, num_opts;
619
620         if (!strcmp(file, "-"))
621                 f = stdin;
622         else
623                 f = fopen(file, "r");
624
625         if (!f) {
626                 perror("fopen job file");
627                 return 1;
628         }
629
630         string = malloc(4096);
631
632         /*
633          * it's really 256 + small bit, 280 should suffice
634          */
635         name = malloc(280);
636         memset(name, 0, 280);
637
638         alloc_opts = 8;
639         opts = malloc(sizeof(char *) * alloc_opts);
640         num_opts = 0;
641
642         stonewall = stonewall_flag;
643         do {
644                 /*
645                  * if skip_fgets is set, we already have loaded a line we
646                  * haven't handled.
647                  */
648                 if (!skip_fgets) {
649                         p = fgets(string, 4095, f);
650                         if (!p)
651                                 break;
652                 }
653
654                 skip_fgets = 0;
655                 strip_blank_front(&p);
656                 strip_blank_end(p);
657
658                 if (is_empty_or_comment(p))
659                         continue;
660                 if (sscanf(p, "[%255s]", name) != 1) {
661                         if (inside_skip)
662                                 continue;
663                         log_err("fio: option <%s> outside of [] job section\n",
664                                                                         p);
665                         break;
666                 }
667
668                 if (skip_this_section(name)) {
669                         inside_skip = 1;
670                         continue;
671                 } else
672                         inside_skip = 0;
673
674                 global = !strncmp(name, "global", 6);
675
676                 name[strlen(name) - 1] = '\0';
677
678                 if (dump_cmdline) {
679                         if (first_sect)
680                                 log_info("fio ");
681                         if (!global)
682                                 log_info("--name=%s ", name);
683                         first_sect = 0;
684                 }
685
686                 td = get_new_job(global, &def_thread);
687                 if (!td) {
688                         ret = 1;
689                         break;
690                 }
691
692                 /*
693                  * Seperate multiple job files by a stonewall
694                  */
695                 if (!global && stonewall) {
696                         td->o.stonewall = stonewall;
697                         stonewall = 0;
698                 }
699
700                 num_opts = 0;
701                 memset(opts, 0, alloc_opts * sizeof(char *));
702
703                 while ((p = fgets(string, 4096, f)) != NULL) {
704                         if (is_empty_or_comment(p))
705                                 continue;
706
707                         strip_blank_front(&p);
708
709                         /*
710                          * new section, break out and make sure we don't
711                          * fgets() a new line at the top.
712                          */
713                         if (p[0] == '[') {
714                                 skip_fgets = 1;
715                                 break;
716                         }
717
718                         strip_blank_end(p);
719
720                         if (num_opts == alloc_opts) {
721                                 alloc_opts <<= 1;
722                                 opts = realloc(opts,
723                                                 alloc_opts * sizeof(char *));
724                         }
725
726                         opts[num_opts] = strdup(p);
727                         num_opts++;
728                 }
729
730                 ret = fio_options_parse(td, opts, num_opts);
731                 if (!ret) {
732                         if (dump_cmdline)
733                                 for (i = 0; i < num_opts; i++)
734                                         log_info("--%s ", opts[i]);
735
736                         ret = add_job(td, name, 0);
737                 } else {
738                         log_err("fio: job %s dropped\n", name);
739                         put_job(td);
740                 }
741
742                 for (i = 0; i < num_opts; i++)
743                         free(opts[i]);
744                 num_opts = 0;
745         } while (!ret);
746
747         if (dump_cmdline)
748                 log_info("\n");
749
750         for (i = 0; i < num_opts; i++)
751                 free(opts[i]);
752
753         free(string);
754         free(name);
755         free(opts);
756         if (f != stdin)
757                 fclose(f);
758         return ret;
759 }
760
761 static int fill_def_thread(void)
762 {
763         memset(&def_thread, 0, sizeof(def_thread));
764
765         fio_getaffinity(getpid(), &def_thread.o.cpumask);
766
767         /*
768          * fill default options
769          */
770         fio_fill_default_options(&def_thread);
771
772         def_thread.o.timeout = def_timeout;
773         def_thread.o.write_bw_log = write_bw_log;
774         def_thread.o.write_lat_log = write_lat_log;
775
776         return 0;
777 }
778
779 static void free_shm(void)
780 {
781         struct shmid_ds sbuf;
782
783         if (threads) {
784                 void *tp = threads;
785
786                 threads = NULL;
787                 file_hash_exit();
788                 fio_debug_jobp = NULL;
789                 shmdt(tp);
790                 shmctl(shm_id, IPC_RMID, &sbuf);
791         }
792
793         scleanup();
794 }
795
796 /*
797  * The thread area is shared between the main process and the job
798  * threads/processes. So setup a shared memory segment that will hold
799  * all the job info. We use the end of the region for keeping track of
800  * open files across jobs, for file sharing.
801  */
802 static int setup_thread_area(void)
803 {
804         void *hash;
805
806         /*
807          * 1024 is too much on some machines, scale max_jobs if
808          * we get a failure that looks like too large a shm segment
809          */
810         do {
811                 size_t size = max_jobs * sizeof(struct thread_data);
812
813                 size += file_hash_size;
814                 size += sizeof(unsigned int);
815
816                 shm_id = shmget(0, size, IPC_CREAT | 0600);
817                 if (shm_id != -1)
818                         break;
819                 if (errno != EINVAL) {
820                         perror("shmget");
821                         break;
822                 }
823
824                 max_jobs >>= 1;
825         } while (max_jobs);
826
827         if (shm_id == -1)
828                 return 1;
829
830         threads = shmat(shm_id, NULL, 0);
831         if (threads == (void *) -1) {
832                 perror("shmat");
833                 return 1;
834         }
835
836         memset(threads, 0, max_jobs * sizeof(struct thread_data));
837         hash = (void *) threads + max_jobs * sizeof(struct thread_data);
838         fio_debug_jobp = (void *) hash + file_hash_size;
839         *fio_debug_jobp = -1;
840         file_hash_init(hash);
841         atexit(free_shm);
842         return 0;
843 }
844
845 static void usage(const char *name)
846 {
847         printf("%s\n", fio_version_string);
848         printf("%s [options] [job options] <job file(s)>\n", name);
849         printf("\t--debug=options\tEnable debug logging\n");
850         printf("\t--output\tWrite output to file\n");
851         printf("\t--timeout\tRuntime in seconds\n");
852         printf("\t--latency-log\tGenerate per-job latency logs\n");
853         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
854         printf("\t--minimal\tMinimal (terse) output\n");
855         printf("\t--version\tPrint version info and exit\n");
856         printf("\t--help\t\tPrint this page\n");
857         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
858                 " them\n");
859         printf("\t--showcmd\tTurn a job file into command line options\n");
860         printf("\t--eta=when\tWhen ETA estimate should be printed\n");
861         printf("\t          \tMay be \"always\", \"never\" or \"auto\"\n");
862         printf("\t--readonly\tTurn on safety read-only checks, preventing"
863                 " writes\n");
864         printf("\t--section=name\tOnly run specified section in job file\n");
865         printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
866                 " (def 1024)\n");
867 }
868
869 #ifdef FIO_INC_DEBUG
870 struct debug_level debug_levels[] = {
871         { .name = "process",    .shift = FD_PROCESS, },
872         { .name = "file",       .shift = FD_FILE, },
873         { .name = "io",         .shift = FD_IO, },
874         { .name = "mem",        .shift = FD_MEM, },
875         { .name = "blktrace",   .shift = FD_BLKTRACE },
876         { .name = "verify",     .shift = FD_VERIFY },
877         { .name = "random",     .shift = FD_RANDOM },
878         { .name = "parse",      .shift = FD_PARSE },
879         { .name = "diskutil",   .shift = FD_DISKUTIL },
880         { .name = "job",        .shift = FD_JOB },
881         { .name = NULL, },
882 };
883
884 static int set_debug(const char *string)
885 {
886         struct debug_level *dl;
887         char *p = (char *) string;
888         char *opt;
889         int i;
890
891         if (!strcmp(string, "?") || !strcmp(string, "help")) {
892                 int i;
893
894                 log_info("fio: dumping debug options:");
895                 for (i = 0; debug_levels[i].name; i++) {
896                         dl = &debug_levels[i];
897                         log_info("%s,", dl->name);
898                 }
899                 log_info("all\n");
900                 return 1;
901         }
902
903         while ((opt = strsep(&p, ",")) != NULL) {
904                 int found = 0;
905
906                 if (!strncmp(opt, "all", 3)) {
907                         log_info("fio: set all debug options\n");
908                         fio_debug = ~0UL;
909                         continue;
910                 }
911
912                 for (i = 0; debug_levels[i].name; i++) {
913                         dl = &debug_levels[i];
914                         found = !strncmp(opt, dl->name, strlen(dl->name));
915                         if (!found)
916                                 continue;
917
918                         if (dl->shift == FD_JOB) {
919                                 opt = strchr(opt, ':');
920                                 if (!opt) {
921                                         log_err("fio: missing job number\n");
922                                         break;
923                                 }
924                                 opt++;
925                                 fio_debug_jobno = atoi(opt);
926                                 log_info("fio: set debug jobno %d\n",
927                                                         fio_debug_jobno);
928                         } else {
929                                 log_info("fio: set debug option %s\n", opt);
930                                 fio_debug |= (1UL << dl->shift);
931                         }
932                         break;
933                 }
934
935                 if (!found)
936                         log_err("fio: debug mask %s not found\n", opt);
937         }
938         return 0;
939 }
940 #else
941 static int set_debug(const char *string)
942 {
943         log_err("fio: debug tracing not included in build\n");
944         return 1;
945 }
946 #endif
947
948 static int parse_cmd_line(int argc, char *argv[])
949 {
950         struct thread_data *td = NULL;
951         int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
952
953         while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
954                 switch (c) {
955                 case 'a':
956                         smalloc_pool_size = atoi(optarg);
957                         break;
958                 case 't':
959                         def_timeout = atoi(optarg);
960                         break;
961                 case 'l':
962                         write_lat_log = 1;
963                         break;
964                 case 'w':
965                         write_bw_log = 1;
966                         break;
967                 case 'o':
968                         f_out = fopen(optarg, "w+");
969                         if (!f_out) {
970                                 perror("fopen output");
971                                 exit(1);
972                         }
973                         f_err = f_out;
974                         break;
975                 case 'm':
976                         terse_output = 1;
977                         break;
978                 case 'h':
979                         usage(argv[0]);
980                         exit(0);
981                 case 'c':
982                         exit(fio_show_option_help(optarg));
983                 case 's':
984                         dump_cmdline = 1;
985                         break;
986                 case 'r':
987                         read_only = 1;
988                         break;
989                 case 'v':
990                         printf("%s\n", fio_version_string);
991                         exit(0);
992                 case 'e':
993                         if (!strcmp("always", optarg))
994                                 eta_print = FIO_ETA_ALWAYS;
995                         else if (!strcmp("never", optarg))
996                                 eta_print = FIO_ETA_NEVER;
997                         break;
998                 case 'd':
999                         if (set_debug(optarg))
1000                                 do_exit++;
1001                         break;
1002                 case 'x':
1003                         if (!strcmp(optarg, "global")) {
1004                                 log_err("fio: can't use global as only "
1005                                         "section\n");
1006                                 do_exit++;
1007                                 exit_val = 1;
1008                                 break;
1009                         }
1010                         if (job_section)
1011                                 free(job_section);
1012                         job_section = strdup(optarg);
1013                         break;
1014                 case FIO_GETOPT_JOB: {
1015                         const char *opt = l_opts[lidx].name;
1016                         char *val = optarg;
1017
1018                         if (!strncmp(opt, "name", 4) && td) {
1019                                 ret = add_job(td, td->o.name ?: "fio", 0);
1020                                 if (ret) {
1021                                         put_job(td);
1022                                         return 0;
1023                                 }
1024                                 td = NULL;
1025                         }
1026                         if (!td) {
1027                                 int is_section = !strncmp(opt, "name", 4);
1028                                 int global = 0;
1029
1030                                 if (!is_section || !strncmp(val, "global", 6))
1031                                         global = 1;
1032
1033                                 if (is_section && skip_this_section(val))
1034                                         continue;
1035
1036                                 td = get_new_job(global, &def_thread);
1037                                 if (!td)
1038                                         return 0;
1039                         }
1040
1041                         ret = fio_cmd_option_parse(td, opt, val);
1042                         break;
1043                 }
1044                 default:
1045                         do_exit++;
1046                         exit_val = 1;
1047                         break;
1048                 }
1049         }
1050
1051         if (do_exit)
1052                 exit(exit_val);
1053
1054         if (td) {
1055                 if (!ret)
1056                         ret = add_job(td, td->o.name ?: "fio", 0);
1057                 if (ret)
1058                         put_job(td);
1059         }
1060
1061         while (optind < argc) {
1062                 ini_idx++;
1063                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1064                 ini_file[ini_idx - 1] = strdup(argv[optind]);
1065                 optind++;
1066         }
1067
1068         return ini_idx;
1069 }
1070
1071 int parse_options(int argc, char *argv[])
1072 {
1073         int job_files, i;
1074
1075         f_out = stdout;
1076         f_err = stderr;
1077
1078         fio_options_dup_and_init(l_opts);
1079
1080         if (setup_thread_area())
1081                 return 1;
1082         if (fill_def_thread())
1083                 return 1;
1084
1085         job_files = parse_cmd_line(argc, argv);
1086
1087         for (i = 0; i < job_files; i++) {
1088                 if (fill_def_thread())
1089                         return 1;
1090                 if (parse_jobs_ini(ini_file[i], i))
1091                         return 1;
1092                 free(ini_file[i]);
1093         }
1094
1095         free(ini_file);
1096         options_mem_free(&def_thread);
1097
1098         if (!thread_number) {
1099                 if (dump_cmdline)
1100                         return 0;
1101
1102                 log_err("No jobs defined(s)\n");
1103                 usage(argv[0]);
1104                 return 1;
1105         }
1106
1107         return 0;
1108 }