9700110983cc6d04ff4ebc4e356fab10ef2e2cee
[fio.git] / options.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <unistd.h>
4 #include <ctype.h>
5 #include <string.h>
6 #include <getopt.h>
7 #include <assert.h>
8 #include <libgen.h>
9 #include <fcntl.h>
10 #include <sys/types.h>
11 #include <sys/stat.h>
12
13 #include "fio.h"
14 #include "parse.h"
15 #include "lib/fls.h"
16
17 #define td_var_offset(var)      ((size_t) &((struct thread_options *)0)->var)
18
19 /*
20  * Check if mmap/mmaphuge has a :/foo/bar/file at the end. If so, return that.
21  */
22 static char *get_opt_postfix(const char *str)
23 {
24         char *p = strstr(str, ":");
25
26         if (!p)
27                 return NULL;
28
29         p++;
30         strip_blank_front(&p);
31         strip_blank_end(p);
32         return strdup(p);
33 }
34
35 static int bs_cmp(const void *p1, const void *p2)
36 {
37         const struct bssplit *bsp1 = p1;
38         const struct bssplit *bsp2 = p2;
39
40         return bsp1->perc < bsp2->perc;
41 }
42
43 static int str_bssplit_cb(void *data, const char *input)
44 {
45         struct thread_data *td = data;
46         char *fname, *str, *p;
47         unsigned int i, perc, perc_missing;
48         unsigned int max_bs, min_bs;
49         long long val;
50
51         p = str = strdup(input);
52
53         strip_blank_front(&str);
54         strip_blank_end(str);
55
56         td->o.bssplit_nr = 4;
57         td->o.bssplit = malloc(4 * sizeof(struct bssplit));
58
59         i = 0;
60         max_bs = 0;
61         min_bs = -1;
62         while ((fname = strsep(&str, ":")) != NULL) {
63                 char *perc_str;
64
65                 if (!strlen(fname))
66                         break;
67
68                 /*
69                  * grow struct buffer, if needed
70                  */
71                 if (i == td->o.bssplit_nr) {
72                         td->o.bssplit_nr <<= 1;
73                         td->o.bssplit = realloc(td->o.bssplit,
74                                                 td->o.bssplit_nr
75                                                   * sizeof(struct bssplit));
76                 }
77
78                 perc_str = strstr(fname, "/");
79                 if (perc_str) {
80                         *perc_str = '\0';
81                         perc_str++;
82                         perc = atoi(perc_str);
83                         if (perc > 100)
84                                 perc = 100;
85                         else if (!perc)
86                                 perc = -1;
87                 } else
88                         perc = -1;
89
90                 if (str_to_decimal(fname, &val, 1)) {
91                         log_err("fio: bssplit conversion failed\n");
92                         free(td->o.bssplit);
93                         return 1;
94                 }
95
96                 if (val > max_bs)
97                         max_bs = val;
98                 if (val < min_bs)
99                         min_bs = val;
100
101                 td->o.bssplit[i].bs = val;
102                 td->o.bssplit[i].perc = perc;
103                 i++;
104         }
105
106         td->o.bssplit_nr = i;
107
108         /*
109          * Now check if the percentages add up, and how much is missing
110          */
111         perc = perc_missing = 0;
112         for (i = 0; i < td->o.bssplit_nr; i++) {
113                 struct bssplit *bsp = &td->o.bssplit[i];
114
115                 if (bsp->perc == (unsigned char) -1)
116                         perc_missing++;
117                 else
118                         perc += bsp->perc;
119         }
120
121         if (perc > 100) {
122                 log_err("fio: bssplit percentages add to more than 100%%\n");
123                 free(td->o.bssplit);
124                 return 1;
125         }
126         /*
127          * If values didn't have a percentage set, divide the remains between
128          * them.
129          */
130         if (perc_missing) {
131                 for (i = 0; i < td->o.bssplit_nr; i++) {
132                         struct bssplit *bsp = &td->o.bssplit[i];
133
134                         if (bsp->perc == (unsigned char) -1)
135                                 bsp->perc = (100 - perc) / perc_missing;
136                 }
137         }
138
139         td->o.min_bs[DDIR_READ] = td->o.min_bs[DDIR_WRITE] = min_bs;
140         td->o.max_bs[DDIR_READ] = td->o.max_bs[DDIR_WRITE] = max_bs;
141
142         /*
143          * now sort based on percentages, for ease of lookup
144          */
145         qsort(td->o.bssplit, td->o.bssplit_nr, sizeof(struct bssplit), bs_cmp);
146
147         free(p);
148         return 0;
149 }
150
151 static int str_rw_cb(void *data, const char *str)
152 {
153         struct thread_data *td = data;
154         char *nr = get_opt_postfix(str);
155
156         td->o.ddir_nr = 1;
157         if (nr) {
158                 td->o.ddir_nr = atoi(nr);
159                 free(nr);
160         }
161
162         return 0;
163 }
164
165 static int str_mem_cb(void *data, const char *mem)
166 {
167         struct thread_data *td = data;
168
169         if (td->o.mem_type == MEM_MMAPHUGE || td->o.mem_type == MEM_MMAP) {
170                 td->mmapfile = get_opt_postfix(mem);
171                 if (td->o.mem_type == MEM_MMAPHUGE && !td->mmapfile) {
172                         log_err("fio: mmaphuge:/path/to/file\n");
173                         return 1;
174                 }
175         }
176
177         return 0;
178 }
179
180 static int str_lockmem_cb(void fio_unused *data, unsigned long *val)
181 {
182         mlock_size = *val;
183         return 0;
184 }
185
186 static int str_rwmix_read_cb(void *data, unsigned int *val)
187 {
188         struct thread_data *td = data;
189
190         td->o.rwmix[DDIR_READ] = *val;
191         td->o.rwmix[DDIR_WRITE] = 100 - *val;
192         return 0;
193 }
194
195 static int str_rwmix_write_cb(void *data, unsigned int *val)
196 {
197         struct thread_data *td = data;
198
199         td->o.rwmix[DDIR_WRITE] = *val;
200         td->o.rwmix[DDIR_READ] = 100 - *val;
201         return 0;
202 }
203
204 #ifdef FIO_HAVE_IOPRIO
205 static int str_prioclass_cb(void *data, unsigned int *val)
206 {
207         struct thread_data *td = data;
208         unsigned short mask;
209
210         /*
211          * mask off old class bits, str_prio_cb() may have set a default class
212          */
213         mask = (1 << IOPRIO_CLASS_SHIFT) - 1;
214         td->ioprio &= mask;
215
216         td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
217         td->ioprio_set = 1;
218         return 0;
219 }
220
221 static int str_prio_cb(void *data, unsigned int *val)
222 {
223         struct thread_data *td = data;
224
225         td->ioprio |= *val;
226
227         /*
228          * If no class is set, assume BE
229          */
230         if ((td->ioprio >> IOPRIO_CLASS_SHIFT) == 0)
231                 td->ioprio |= IOPRIO_CLASS_BE << IOPRIO_CLASS_SHIFT;
232
233         td->ioprio_set = 1;
234         return 0;
235 }
236 #endif
237
238 static int str_exitall_cb(void)
239 {
240         exitall_on_terminate = 1;
241         return 0;
242 }
243
244 #ifdef FIO_HAVE_CPU_AFFINITY
245 static int str_cpumask_cb(void *data, unsigned int *val)
246 {
247         struct thread_data *td = data;
248         unsigned int i;
249         long max_cpu;
250         int ret;
251
252         ret = fio_cpuset_init(&td->o.cpumask);
253         if (ret < 0) {
254                 log_err("fio: cpuset_init failed\n");
255                 td_verror(td, ret, "fio_cpuset_init");
256                 return 1;
257         }
258
259         max_cpu = sysconf(_SC_NPROCESSORS_ONLN);
260
261         for (i = 0; i < sizeof(int) * 8; i++) {
262                 if ((1 << i) & *val) {
263                         if (i > max_cpu) {
264                                 log_err("fio: CPU %d too large (max=%ld)\n", i,
265                                                                 max_cpu);
266                                 return 1;
267                         }
268                         dprint(FD_PARSE, "set cpu allowed %d\n", i);
269                         fio_cpu_set(&td->o.cpumask, i);
270                 }
271         }
272
273         td->o.cpumask_set = 1;
274         return 0;
275 }
276
277 static int str_cpus_allowed_cb(void *data, const char *input)
278 {
279         struct thread_data *td = data;
280         char *cpu, *str, *p;
281         long max_cpu;
282         int ret = 0;
283
284         ret = fio_cpuset_init(&td->o.cpumask);
285         if (ret < 0) {
286                 log_err("fio: cpuset_init failed\n");
287                 td_verror(td, ret, "fio_cpuset_init");
288                 return 1;
289         }
290
291         p = str = strdup(input);
292
293         strip_blank_front(&str);
294         strip_blank_end(str);
295
296         max_cpu = sysconf(_SC_NPROCESSORS_ONLN);
297
298         while ((cpu = strsep(&str, ",")) != NULL) {
299                 char *str2, *cpu2;
300                 int icpu, icpu2;
301
302                 if (!strlen(cpu))
303                         break;
304
305                 str2 = cpu;
306                 icpu2 = -1;
307                 while ((cpu2 = strsep(&str2, "-")) != NULL) {
308                         if (!strlen(cpu2))
309                                 break;
310
311                         icpu2 = atoi(cpu2);
312                 }
313
314                 icpu = atoi(cpu);
315                 if (icpu2 == -1)
316                         icpu2 = icpu;
317                 while (icpu <= icpu2) {
318                         if (icpu >= FIO_MAX_CPUS) {
319                                 log_err("fio: your OS only supports up to"
320                                         " %d CPUs\n", (int) FIO_MAX_CPUS);
321                                 ret = 1;
322                                 break;
323                         }
324                         if (icpu > max_cpu) {
325                                 log_err("fio: CPU %d too large (max=%ld)\n",
326                                                         icpu, max_cpu);
327                                 ret = 1;
328                                 break;
329                         }
330         
331                         dprint(FD_PARSE, "set cpu allowed %d\n", icpu);
332                         fio_cpu_set(&td->o.cpumask, icpu);
333                         icpu++;
334                 }
335                 if (ret)
336                         break;
337         }
338
339         free(p);
340         if (!ret)
341                 td->o.cpumask_set = 1;
342         return ret;
343 }
344 #endif
345
346 static int str_fst_cb(void *data, const char *str)
347 {
348         struct thread_data *td = data;
349         char *nr = get_opt_postfix(str);
350
351         td->file_service_nr = 1;
352         if (nr) {
353                 td->file_service_nr = atoi(nr);
354                 free(nr);
355         }
356
357         return 0;
358 }
359
360 static int check_dir(struct thread_data *td, char *fname)
361 {
362         char file[PATH_MAX], *dir;
363         int elen = 0;
364
365         if (td->o.directory) {
366                 strcpy(file, td->o.directory);
367                 strcat(file, "/");
368                 elen = strlen(file);
369         }
370
371         sprintf(file + elen, "%s", fname);
372         dir = dirname(file);
373
374 #if 0
375         {
376         struct stat sb;
377         /*
378          * We can't do this on FIO_DISKLESSIO engines. The engine isn't loaded
379          * yet, so we can't do this check right here...
380          */
381         if (lstat(dir, &sb) < 0) {
382                 int ret = errno;
383
384                 log_err("fio: %s is not a directory\n", dir);
385                 td_verror(td, ret, "lstat");
386                 return 1;
387         }
388
389         if (!S_ISDIR(sb.st_mode)) {
390                 log_err("fio: %s is not a directory\n", dir);
391                 return 1;
392         }
393         }
394 #endif
395
396         return 0;
397 }
398
399 static int str_filename_cb(void *data, const char *input)
400 {
401         struct thread_data *td = data;
402         char *fname, *str, *p;
403
404         p = str = strdup(input);
405
406         strip_blank_front(&str);
407         strip_blank_end(str);
408
409         if (!td->files_index)
410                 td->o.nr_files = 0;
411
412         while ((fname = strsep(&str, ":")) != NULL) {
413                 if (!strlen(fname))
414                         break;
415                 if (check_dir(td, fname)) {
416                         free(p);
417                         return 1;
418                 }
419                 add_file(td, fname);
420                 td->o.nr_files++;
421         }
422
423         free(p);
424         return 0;
425 }
426
427 static int str_directory_cb(void *data, const char fio_unused *str)
428 {
429         struct thread_data *td = data;
430         struct stat sb;
431
432         if (lstat(td->o.directory, &sb) < 0) {
433                 int ret = errno;
434
435                 log_err("fio: %s is not a directory\n", td->o.directory);
436                 td_verror(td, ret, "lstat");
437                 return 1;
438         }
439         if (!S_ISDIR(sb.st_mode)) {
440                 log_err("fio: %s is not a directory\n", td->o.directory);
441                 return 1;
442         }
443
444         return 0;
445 }
446
447 static int str_opendir_cb(void *data, const char fio_unused *str)
448 {
449         struct thread_data *td = data;
450
451         if (!td->files_index)
452                 td->o.nr_files = 0;
453
454         return add_dir_files(td, td->o.opendir);
455 }
456
457 static int str_verify_offset_cb(void *data, unsigned int *off)
458 {
459         struct thread_data *td = data;
460
461         if (*off && *off < sizeof(struct verify_header)) {
462                 log_err("fio: verify_offset too small\n");
463                 return 1;
464         }
465
466         td->o.verify_offset = *off;
467         return 0;
468 }
469
470 static int str_verify_pattern_cb(void *data, unsigned int *off)
471 {
472         struct thread_data *td = data;
473         unsigned int msb;
474
475         msb = __fls(*off);
476         if (msb <= 8)
477                 td->o.verify_pattern_bytes = 1;
478         else if (msb <= 16)
479                 td->o.verify_pattern_bytes = 2;
480         else if (msb <= 24)
481                 td->o.verify_pattern_bytes = 3;
482         else
483                 td->o.verify_pattern_bytes = 4;
484
485         td->o.verify_pattern = *off;
486         return 0;
487 }
488
489 static int str_lockfile_cb(void *data, const char *str)
490 {
491         struct thread_data *td = data;
492         char *nr = get_opt_postfix(str);
493
494         td->o.lockfile_batch = 1;
495         if (nr) {
496                 td->o.lockfile_batch = atoi(nr);
497                 free(nr);
498         }
499
500         return 0;
501 }
502
503 static int str_write_bw_log_cb(void *data, const char *str)
504 {
505         struct thread_data *td = data;
506
507         if (str)
508                 td->o.bw_log_file = strdup(str);
509
510         td->o.write_bw_log = 1;
511         return 0;
512 }
513
514 static int str_write_lat_log_cb(void *data, const char *str)
515 {
516         struct thread_data *td = data;
517
518         if (str)
519                 td->o.lat_log_file = strdup(str);
520
521         td->o.write_lat_log = 1;
522         return 0;
523 }
524
525 static int str_gtod_reduce_cb(void *data, int *il)
526 {
527         struct thread_data *td = data;
528         int val = *il;
529
530         td->o.disable_clat = !!val;
531         td->o.disable_slat = !!val;
532         td->o.disable_bw = !!val;
533         if (val)
534                 td->tv_cache_mask = 63;
535
536         return 0;
537 }
538
539 static int str_gtod_cpu_cb(void *data, int *il)
540 {
541         struct thread_data *td = data;
542         int val = *il;
543
544         td->o.gtod_cpu = val;
545         td->o.gtod_offload = 1;
546         return 0;
547 }
548
549 #define __stringify_1(x)        #x
550 #define __stringify(x)          __stringify_1(x)
551
552 /*
553  * Map of job/command line options
554  */
555 static struct fio_option options[] = {
556         {
557                 .name   = "description",
558                 .type   = FIO_OPT_STR_STORE,
559                 .off1   = td_var_offset(description),
560                 .help   = "Text job description",
561         },
562         {
563                 .name   = "name",
564                 .type   = FIO_OPT_STR_STORE,
565                 .off1   = td_var_offset(name),
566                 .help   = "Name of this job",
567         },
568         {
569                 .name   = "directory",
570                 .type   = FIO_OPT_STR_STORE,
571                 .off1   = td_var_offset(directory),
572                 .cb     = str_directory_cb,
573                 .help   = "Directory to store files in",
574         },
575         {
576                 .name   = "filename",
577                 .type   = FIO_OPT_STR_STORE,
578                 .off1   = td_var_offset(filename),
579                 .cb     = str_filename_cb,
580                 .prio   = 1, /* must come before "directory" */
581                 .help   = "File(s) to use for the workload",
582         },
583         {
584                 .name   = "lockfile",
585                 .type   = FIO_OPT_STR,
586                 .cb     = str_lockfile_cb,
587                 .off1   = td_var_offset(file_lock_mode),
588                 .help   = "Lock file when doing IO to it",
589                 .parent = "filename",
590                 .def    = "none",
591                 .posval = {
592                           { .ival = "none",
593                             .oval = FILE_LOCK_NONE,
594                             .help = "No file locking",
595                           },
596                           { .ival = "exclusive",
597                             .oval = FILE_LOCK_EXCLUSIVE,
598                             .help = "Exclusive file lock",
599                           },
600                           {
601                             .ival = "readwrite",
602                             .oval = FILE_LOCK_READWRITE,
603                             .help = "Read vs write lock",
604                           },
605                 },
606         },
607         {
608                 .name   = "opendir",
609                 .type   = FIO_OPT_STR_STORE,
610                 .off1   = td_var_offset(opendir),
611                 .cb     = str_opendir_cb,
612                 .help   = "Recursively add files from this directory and down",
613         },
614         {
615                 .name   = "rw",
616                 .alias  = "readwrite",
617                 .type   = FIO_OPT_STR,
618                 .cb     = str_rw_cb,
619                 .off1   = td_var_offset(td_ddir),
620                 .help   = "IO direction",
621                 .def    = "read",
622                 .posval = {
623                           { .ival = "read",
624                             .oval = TD_DDIR_READ,
625                             .help = "Sequential read",
626                           },
627                           { .ival = "write",
628                             .oval = TD_DDIR_WRITE,
629                             .help = "Sequential write",
630                           },
631                           { .ival = "randread",
632                             .oval = TD_DDIR_RANDREAD,
633                             .help = "Random read",
634                           },
635                           { .ival = "randwrite",
636                             .oval = TD_DDIR_RANDWRITE,
637                             .help = "Random write",
638                           },
639                           { .ival = "rw",
640                             .oval = TD_DDIR_RW,
641                             .help = "Sequential read and write mix",
642                           },
643                           { .ival = "randrw",
644                             .oval = TD_DDIR_RANDRW,
645                             .help = "Random read and write mix"
646                           },
647                 },
648         },
649         {
650                 .name   = "ioengine",
651                 .type   = FIO_OPT_STR_STORE,
652                 .off1   = td_var_offset(ioengine),
653                 .help   = "IO engine to use",
654                 .def    = "sync",
655                 .posval = {
656                           { .ival = "sync",
657                             .help = "Use read/write",
658                           },
659                           { .ival = "psync",
660                             .help = "Use pread/pwrite",
661                           },
662                           { .ival = "vsync",
663                              .help = "Use readv/writev",
664                           },
665 #ifdef FIO_HAVE_LIBAIO
666                           { .ival = "libaio",
667                             .help = "Linux native asynchronous IO",
668                           },
669 #endif
670 #ifdef FIO_HAVE_POSIXAIO
671                           { .ival = "posixaio",
672                             .help = "POSIX asynchronous IO",
673                           },
674 #endif
675 #ifdef FIO_HAVE_SOLARISAIO
676                           { .ival = "solarisaio",
677                             .help = "Solaris native asynchronous IO",
678                           },
679 #endif
680                           { .ival = "mmap",
681                             .help = "Memory mapped IO",
682                           },
683 #ifdef FIO_HAVE_SPLICE
684                           { .ival = "splice",
685                             .help = "splice/vmsplice based IO",
686                           },
687                           { .ival = "netsplice",
688                             .help = "splice/vmsplice to/from the network",
689                           },
690 #endif
691 #ifdef FIO_HAVE_SGIO
692                           { .ival = "sg",
693                             .help = "SCSI generic v3 IO",
694                           },
695 #endif
696                           { .ival = "null",
697                             .help = "Testing engine (no data transfer)",
698                           },
699                           { .ival = "net",
700                             .help = "Network IO",
701                           },
702 #ifdef FIO_HAVE_SYSLET
703                           { .ival = "syslet-rw",
704                             .help = "syslet enabled async pread/pwrite IO",
705                           },
706 #endif
707                           { .ival = "cpuio",
708                             .help = "CPU cycler burner engine",
709                           },
710 #ifdef FIO_HAVE_GUASI
711                           { .ival = "guasi",
712                             .help = "GUASI IO engine",
713                           },
714 #endif
715                           { .ival = "external",
716                             .help = "Load external engine (append name)",
717                           },
718                 },
719         },
720         {
721                 .name   = "iodepth",
722                 .type   = FIO_OPT_INT,
723                 .off1   = td_var_offset(iodepth),
724                 .help   = "Amount of IO buffers to keep in flight",
725                 .minval = 1,
726                 .def    = "1",
727         },
728         {
729                 .name   = "iodepth_batch",
730                 .alias  = "iodepth_batch_submit",
731                 .type   = FIO_OPT_INT,
732                 .off1   = td_var_offset(iodepth_batch),
733                 .help   = "Number of IO buffers to submit in one go",
734                 .parent = "iodepth",
735                 .minval = 1,
736                 .def    = "1",
737         },
738         {
739                 .name   = "iodepth_batch_complete",
740                 .type   = FIO_OPT_INT,
741                 .off1   = td_var_offset(iodepth_batch_complete),
742                 .help   = "Number of IO buffers to retrieve in one go",
743                 .parent = "iodepth",
744                 .minval = 0,
745                 .def    = "1",
746         },
747         {
748                 .name   = "iodepth_low",
749                 .type   = FIO_OPT_INT,
750                 .off1   = td_var_offset(iodepth_low),
751                 .help   = "Low water mark for queuing depth",
752                 .parent = "iodepth",
753         },
754         {
755                 .name   = "size",
756                 .type   = FIO_OPT_STR_VAL,
757                 .off1   = td_var_offset(size),
758                 .minval = 1,
759                 .help   = "Total size of device or files",
760         },
761         {
762                 .name   = "fill_device",
763                 .type   = FIO_OPT_BOOL,
764                 .off1   = td_var_offset(fill_device),
765                 .help   = "Write until an ENOSPC error occurs",
766                 .def    = "0",
767         },
768         {
769                 .name   = "filesize",
770                 .type   = FIO_OPT_STR_VAL,
771                 .off1   = td_var_offset(file_size_low),
772                 .off2   = td_var_offset(file_size_high),
773                 .minval = 1,
774                 .help   = "Size of individual files",
775         },
776         {
777                 .name   = "offset",
778                 .alias  = "fileoffset",
779                 .type   = FIO_OPT_STR_VAL,
780                 .off1   = td_var_offset(start_offset),
781                 .help   = "Start IO from this offset",
782                 .def    = "0",
783         },
784         {
785                 .name   = "bs",
786                 .alias  = "blocksize",
787                 .type   = FIO_OPT_STR_VAL_INT,
788                 .off1   = td_var_offset(bs[DDIR_READ]),
789                 .off2   = td_var_offset(bs[DDIR_WRITE]),
790                 .minval = 1,
791                 .help   = "Block size unit",
792                 .def    = "4k",
793                 .parent = "rw",
794         },
795         {
796                 .name   = "ba",
797                 .alias  = "blockalign",
798                 .type   = FIO_OPT_STR_VAL_INT,
799                 .off1   = td_var_offset(ba[DDIR_READ]),
800                 .off2   = td_var_offset(ba[DDIR_WRITE]),
801                 .minval = 1,
802                 .help   = "IO block offset alignment",
803                 .parent = "rw",
804         },
805         {
806                 .name   = "bsrange",
807                 .alias  = "blocksize_range",
808                 .type   = FIO_OPT_RANGE,
809                 .off1   = td_var_offset(min_bs[DDIR_READ]),
810                 .off2   = td_var_offset(max_bs[DDIR_READ]),
811                 .off3   = td_var_offset(min_bs[DDIR_WRITE]),
812                 .off4   = td_var_offset(max_bs[DDIR_WRITE]),
813                 .minval = 1,
814                 .help   = "Set block size range (in more detail than bs)",
815                 .parent = "rw",
816         },
817         {
818                 .name   = "bssplit",
819                 .type   = FIO_OPT_STR,
820                 .cb     = str_bssplit_cb,
821                 .help   = "Set a specific mix of block sizes",
822                 .parent = "rw",
823         },
824         {
825                 .name   = "bs_unaligned",
826                 .alias  = "blocksize_unaligned",
827                 .type   = FIO_OPT_STR_SET,
828                 .off1   = td_var_offset(bs_unaligned),
829                 .help   = "Don't sector align IO buffer sizes",
830                 .parent = "rw",
831         },
832         {
833                 .name   = "randrepeat",
834                 .type   = FIO_OPT_BOOL,
835                 .off1   = td_var_offset(rand_repeatable),
836                 .help   = "Use repeatable random IO pattern",
837                 .def    = "1",
838                 .parent = "rw",
839         },
840         {
841                 .name   = "norandommap",
842                 .type   = FIO_OPT_STR_SET,
843                 .off1   = td_var_offset(norandommap),
844                 .help   = "Accept potential duplicate random blocks",
845                 .parent = "rw",
846         },
847         {
848                 .name   = "softrandommap",
849                 .type   = FIO_OPT_BOOL,
850                 .off1   = td_var_offset(softrandommap),
851                 .help   = "Set norandommap if randommap allocation fails",
852                 .parent = "norandommap",
853                 .def    = "0",
854         },
855         {
856                 .name   = "nrfiles",
857                 .type   = FIO_OPT_INT,
858                 .off1   = td_var_offset(nr_files),
859                 .help   = "Split job workload between this number of files",
860                 .def    = "1",
861         },
862         {
863                 .name   = "openfiles",
864                 .type   = FIO_OPT_INT,
865                 .off1   = td_var_offset(open_files),
866                 .help   = "Number of files to keep open at the same time",
867         },
868         {
869                 .name   = "file_service_type",
870                 .type   = FIO_OPT_STR,
871                 .cb     = str_fst_cb,
872                 .off1   = td_var_offset(file_service_type),
873                 .help   = "How to select which file to service next",
874                 .def    = "roundrobin",
875                 .posval = {
876                           { .ival = "random",
877                             .oval = FIO_FSERVICE_RANDOM,
878                             .help = "Choose a file at random",
879                           },
880                           { .ival = "roundrobin",
881                             .oval = FIO_FSERVICE_RR,
882                             .help = "Round robin select files",
883                           },
884                           { .ival = "sequential",
885                             .oval = FIO_FSERVICE_SEQ,
886                             .help = "Finish one file before moving to the next",
887                           },
888                 },
889                 .parent = "nrfiles",
890         },
891         {
892                 .name   = "fadvise_hint",
893                 .type   = FIO_OPT_BOOL,
894                 .off1   = td_var_offset(fadvise_hint),
895                 .help   = "Use fadvise() to advise the kernel on IO pattern",
896                 .def    = "1",
897         },
898         {
899                 .name   = "fsync",
900                 .type   = FIO_OPT_INT,
901                 .off1   = td_var_offset(fsync_blocks),
902                 .help   = "Issue fsync for writes every given number of blocks",
903                 .def    = "0",
904         },
905         {
906                 .name   = "direct",
907                 .type   = FIO_OPT_BOOL,
908                 .off1   = td_var_offset(odirect),
909                 .help   = "Use O_DIRECT IO (negates buffered)",
910                 .def    = "0",
911         },
912         {
913                 .name   = "buffered",
914                 .type   = FIO_OPT_BOOL,
915                 .off1   = td_var_offset(odirect),
916                 .neg    = 1,
917                 .help   = "Use buffered IO (negates direct)",
918                 .def    = "1",
919         },
920         {
921                 .name   = "overwrite",
922                 .type   = FIO_OPT_BOOL,
923                 .off1   = td_var_offset(overwrite),
924                 .help   = "When writing, set whether to overwrite current data",
925                 .def    = "0",
926         },
927         {
928                 .name   = "loops",
929                 .type   = FIO_OPT_INT,
930                 .off1   = td_var_offset(loops),
931                 .help   = "Number of times to run the job",
932                 .def    = "1",
933         },
934         {
935                 .name   = "numjobs",
936                 .type   = FIO_OPT_INT,
937                 .off1   = td_var_offset(numjobs),
938                 .help   = "Duplicate this job this many times",
939                 .def    = "1",
940         },
941         {
942                 .name   = "startdelay",
943                 .type   = FIO_OPT_INT,
944                 .off1   = td_var_offset(start_delay),
945                 .help   = "Only start job when this period has passed",
946                 .def    = "0",
947         },
948         {
949                 .name   = "runtime",
950                 .alias  = "timeout",
951                 .type   = FIO_OPT_STR_VAL_TIME,
952                 .off1   = td_var_offset(timeout),
953                 .help   = "Stop workload when this amount of time has passed",
954                 .def    = "0",
955         },
956         {
957                 .name   = "time_based",
958                 .type   = FIO_OPT_STR_SET,
959                 .off1   = td_var_offset(time_based),
960                 .help   = "Keep running until runtime/timeout is met",
961         },
962         {
963                 .name   = "ramp_time",
964                 .type   = FIO_OPT_STR_VAL_TIME,
965                 .off1   = td_var_offset(ramp_time),
966                 .help   = "Ramp up time before measuring performance",
967         },
968         {
969                 .name   = "mem",
970                 .alias  = "iomem",
971                 .type   = FIO_OPT_STR,
972                 .cb     = str_mem_cb,
973                 .off1   = td_var_offset(mem_type),
974                 .help   = "Backing type for IO buffers",
975                 .def    = "malloc",
976                 .posval = {
977                           { .ival = "malloc",
978                             .oval = MEM_MALLOC,
979                             .help = "Use malloc(3) for IO buffers",
980                           },
981                           { .ival = "shm",
982                             .oval = MEM_SHM,
983                             .help = "Use shared memory segments for IO buffers",
984                           },
985 #ifdef FIO_HAVE_HUGETLB
986                           { .ival = "shmhuge",
987                             .oval = MEM_SHMHUGE,
988                             .help = "Like shm, but use huge pages",
989                           },
990 #endif
991                           { .ival = "mmap",
992                             .oval = MEM_MMAP,
993                             .help = "Use mmap(2) (file or anon) for IO buffers",
994                           },
995 #ifdef FIO_HAVE_HUGETLB
996                           { .ival = "mmaphuge",
997                             .oval = MEM_MMAPHUGE,
998                             .help = "Like mmap, but use huge pages",
999                           },
1000 #endif
1001                   },
1002         },
1003         {
1004                 .name   = "verify",
1005                 .type   = FIO_OPT_STR,
1006                 .off1   = td_var_offset(verify),
1007                 .help   = "Verify data written",
1008                 .def    = "0",
1009                 .posval = {
1010                           { .ival = "0",
1011                             .oval = VERIFY_NONE,
1012                             .help = "Don't do IO verification",
1013                           },
1014                           { .ival = "md5",
1015                             .oval = VERIFY_MD5,
1016                             .help = "Use md5 checksums for verification",
1017                           },
1018                           { .ival = "crc64",
1019                             .oval = VERIFY_CRC64,
1020                             .help = "Use crc64 checksums for verification",
1021                           },
1022                           { .ival = "crc32",
1023                             .oval = VERIFY_CRC32,
1024                             .help = "Use crc32 checksums for verification",
1025                           },
1026                           { .ival = "crc32c-intel",
1027                             .oval = VERIFY_CRC32C_INTEL,
1028                             .help = "Use hw crc32c checksums for verification",
1029                           },
1030                           { .ival = "crc32c",
1031                             .oval = VERIFY_CRC32C,
1032                             .help = "Use crc32c checksums for verification",
1033                           },
1034                           { .ival = "crc16",
1035                             .oval = VERIFY_CRC16,
1036                             .help = "Use crc16 checksums for verification",
1037                           },
1038                           { .ival = "crc7",
1039                             .oval = VERIFY_CRC7,
1040                             .help = "Use crc7 checksums for verification",
1041                           },
1042                           { .ival = "sha256",
1043                             .oval = VERIFY_SHA256,
1044                             .help = "Use sha256 checksums for verification",
1045                           },
1046                           { .ival = "sha512",
1047                             .oval = VERIFY_SHA512,
1048                             .help = "Use sha512 checksums for verification",
1049                           },
1050                           { .ival = "meta",
1051                             .oval = VERIFY_META,
1052                             .help = "Use io information",
1053                           },
1054                           {
1055                             .ival = "null",
1056                             .oval = VERIFY_NULL,
1057                             .help = "Pretend to verify",
1058                           },
1059                 },
1060         },
1061         {
1062                 .name   = "do_verify",
1063                 .type   = FIO_OPT_BOOL,
1064                 .off1   = td_var_offset(do_verify),
1065                 .help   = "Run verification stage after write",
1066                 .def    = "1",
1067                 .parent = "verify",
1068         },
1069         {
1070                 .name   = "verifysort",
1071                 .type   = FIO_OPT_BOOL,
1072                 .off1   = td_var_offset(verifysort),
1073                 .help   = "Sort written verify blocks for read back",
1074                 .def    = "1",
1075                 .parent = "verify",
1076         },
1077         {
1078                 .name   = "verify_interval",
1079                 .type   = FIO_OPT_STR_VAL_INT,
1080                 .off1   = td_var_offset(verify_interval),
1081                 .minval = 2 * sizeof(struct verify_header),
1082                 .help   = "Store verify buffer header every N bytes",
1083                 .parent = "verify",
1084         },
1085         {
1086                 .name   = "verify_offset",
1087                 .type   = FIO_OPT_STR_VAL_INT,
1088                 .help   = "Offset verify header location by N bytes",
1089                 .def    = "0",
1090                 .cb     = str_verify_offset_cb,
1091                 .parent = "verify",
1092         },
1093         {
1094                 .name   = "verify_pattern",
1095                 .type   = FIO_OPT_INT,
1096                 .cb     = str_verify_pattern_cb,
1097                 .help   = "Fill pattern for IO buffers",
1098                 .parent = "verify",
1099         },
1100         {
1101                 .name   = "verify_fatal",
1102                 .type   = FIO_OPT_BOOL,
1103                 .off1   = td_var_offset(verify_fatal),
1104                 .def    = "0",
1105                 .help   = "Exit on a single verify failure, don't continue",
1106                 .parent = "verify",
1107         },
1108         {
1109                 .name   = "write_iolog",
1110                 .type   = FIO_OPT_STR_STORE,
1111                 .off1   = td_var_offset(write_iolog_file),
1112                 .help   = "Store IO pattern to file",
1113         },
1114         {
1115                 .name   = "read_iolog",
1116                 .type   = FIO_OPT_STR_STORE,
1117                 .off1   = td_var_offset(read_iolog_file),
1118                 .help   = "Playback IO pattern from file",
1119         },
1120         {
1121                 .name   = "exec_prerun",
1122                 .type   = FIO_OPT_STR_STORE,
1123                 .off1   = td_var_offset(exec_prerun),
1124                 .help   = "Execute this file prior to running job",
1125         },
1126         {
1127                 .name   = "exec_postrun",
1128                 .type   = FIO_OPT_STR_STORE,
1129                 .off1   = td_var_offset(exec_postrun),
1130                 .help   = "Execute this file after running job",
1131         },
1132 #ifdef FIO_HAVE_IOSCHED_SWITCH
1133         {
1134                 .name   = "ioscheduler",
1135                 .type   = FIO_OPT_STR_STORE,
1136                 .off1   = td_var_offset(ioscheduler),
1137                 .help   = "Use this IO scheduler on the backing device",
1138         },
1139 #endif
1140         {
1141                 .name   = "zonesize",
1142                 .type   = FIO_OPT_STR_VAL,
1143                 .off1   = td_var_offset(zone_size),
1144                 .help   = "Give size of an IO zone",
1145                 .def    = "0",
1146         },
1147         {
1148                 .name   = "zoneskip",
1149                 .type   = FIO_OPT_STR_VAL,
1150                 .off1   = td_var_offset(zone_skip),
1151                 .help   = "Space between IO zones",
1152                 .def    = "0",
1153         },
1154         {
1155                 .name   = "lockmem",
1156                 .type   = FIO_OPT_STR_VAL,
1157                 .cb     = str_lockmem_cb,
1158                 .help   = "Lock down this amount of memory",
1159                 .def    = "0",
1160         },
1161         {
1162                 .name   = "rwmixread",
1163                 .type   = FIO_OPT_INT,
1164                 .cb     = str_rwmix_read_cb,
1165                 .maxval = 100,
1166                 .help   = "Percentage of mixed workload that is reads",
1167                 .def    = "50",
1168         },
1169         {
1170                 .name   = "rwmixwrite",
1171                 .type   = FIO_OPT_INT,
1172                 .cb     = str_rwmix_write_cb,
1173                 .maxval = 100,
1174                 .help   = "Percentage of mixed workload that is writes",
1175                 .def    = "50",
1176         },
1177         {
1178                 .name   = "rwmixcycle",
1179                 .type   = FIO_OPT_DEPRECATED,
1180         },
1181         {
1182                 .name   = "nice",
1183                 .type   = FIO_OPT_INT,
1184                 .off1   = td_var_offset(nice),
1185                 .help   = "Set job CPU nice value",
1186                 .minval = -19,
1187                 .maxval = 20,
1188                 .def    = "0",
1189         },
1190 #ifdef FIO_HAVE_IOPRIO
1191         {
1192                 .name   = "prio",
1193                 .type   = FIO_OPT_INT,
1194                 .cb     = str_prio_cb,
1195                 .help   = "Set job IO priority value",
1196                 .minval = 0,
1197                 .maxval = 7,
1198         },
1199         {
1200                 .name   = "prioclass",
1201                 .type   = FIO_OPT_INT,
1202                 .cb     = str_prioclass_cb,
1203                 .help   = "Set job IO priority class",
1204                 .minval = 0,
1205                 .maxval = 3,
1206         },
1207 #endif
1208         {
1209                 .name   = "thinktime",
1210                 .type   = FIO_OPT_INT,
1211                 .off1   = td_var_offset(thinktime),
1212                 .help   = "Idle time between IO buffers (usec)",
1213                 .def    = "0",
1214         },
1215         {
1216                 .name   = "thinktime_spin",
1217                 .type   = FIO_OPT_INT,
1218                 .off1   = td_var_offset(thinktime_spin),
1219                 .help   = "Start think time by spinning this amount (usec)",
1220                 .def    = "0",
1221                 .parent = "thinktime",
1222         },
1223         {
1224                 .name   = "thinktime_blocks",
1225                 .type   = FIO_OPT_INT,
1226                 .off1   = td_var_offset(thinktime_blocks),
1227                 .help   = "IO buffer period between 'thinktime'",
1228                 .def    = "1",
1229                 .parent = "thinktime",
1230         },
1231         {
1232                 .name   = "rate",
1233                 .type   = FIO_OPT_INT,
1234                 .off1   = td_var_offset(rate),
1235                 .help   = "Set bandwidth rate",
1236         },
1237         {
1238                 .name   = "ratemin",
1239                 .type   = FIO_OPT_INT,
1240                 .off1   = td_var_offset(ratemin),
1241                 .help   = "Job must meet this rate or it will be shutdown",
1242                 .parent = "rate",
1243         },
1244         {
1245                 .name   = "rate_iops",
1246                 .type   = FIO_OPT_INT,
1247                 .off1   = td_var_offset(rate_iops),
1248                 .help   = "Limit IO used to this number of IO operations/sec",
1249         },
1250         {
1251                 .name   = "rate_iops_min",
1252                 .type   = FIO_OPT_INT,
1253                 .off1   = td_var_offset(rate_iops_min),
1254                 .help   = "Job must meet this rate or it will be shutdown",
1255                 .parent = "rate_iops",
1256         },
1257         {
1258                 .name   = "ratecycle",
1259                 .type   = FIO_OPT_INT,
1260                 .off1   = td_var_offset(ratecycle),
1261                 .help   = "Window average for rate limits (msec)",
1262                 .def    = "1000",
1263                 .parent = "rate",
1264         },
1265         {
1266                 .name   = "invalidate",
1267                 .type   = FIO_OPT_BOOL,
1268                 .off1   = td_var_offset(invalidate_cache),
1269                 .help   = "Invalidate buffer/page cache prior to running job",
1270                 .def    = "1",
1271         },
1272         {
1273                 .name   = "sync",
1274                 .type   = FIO_OPT_BOOL,
1275                 .off1   = td_var_offset(sync_io),
1276                 .help   = "Use O_SYNC for buffered writes",
1277                 .def    = "0",
1278                 .parent = "buffered",
1279         },
1280         {
1281                 .name   = "bwavgtime",
1282                 .type   = FIO_OPT_INT,
1283                 .off1   = td_var_offset(bw_avg_time),
1284                 .help   = "Time window over which to calculate bandwidth"
1285                           " (msec)",
1286                 .def    = "500",
1287         },
1288         {
1289                 .name   = "create_serialize",
1290                 .type   = FIO_OPT_BOOL,
1291                 .off1   = td_var_offset(create_serialize),
1292                 .help   = "Serialize creating of job files",
1293                 .def    = "1",
1294         },
1295         {
1296                 .name   = "create_fsync",
1297                 .type   = FIO_OPT_BOOL,
1298                 .off1   = td_var_offset(create_fsync),
1299                 .help   = "Fsync file after creation",
1300                 .def    = "1",
1301         },
1302         {
1303                 .name   = "create_on_open",
1304                 .type   = FIO_OPT_BOOL,
1305                 .off1   = td_var_offset(create_on_open),
1306                 .help   = "Create files when they are opened for IO",
1307                 .def    = "0",
1308         },
1309         {
1310                 .name   = "cpuload",
1311                 .type   = FIO_OPT_INT,
1312                 .off1   = td_var_offset(cpuload),
1313                 .help   = "Use this percentage of CPU",
1314         },
1315         {
1316                 .name   = "cpuchunks",
1317                 .type   = FIO_OPT_INT,
1318                 .off1   = td_var_offset(cpucycle),
1319                 .help   = "Length of the CPU burn cycles (usecs)",
1320                 .def    = "50000",
1321                 .parent = "cpuload",
1322         },
1323 #ifdef FIO_HAVE_CPU_AFFINITY
1324         {
1325                 .name   = "cpumask",
1326                 .type   = FIO_OPT_INT,
1327                 .cb     = str_cpumask_cb,
1328                 .help   = "CPU affinity mask",
1329         },
1330         {
1331                 .name   = "cpus_allowed",
1332                 .type   = FIO_OPT_STR,
1333                 .cb     = str_cpus_allowed_cb,
1334                 .help   = "Set CPUs allowed",
1335         },
1336 #endif
1337         {
1338                 .name   = "end_fsync",
1339                 .type   = FIO_OPT_BOOL,
1340                 .off1   = td_var_offset(end_fsync),
1341                 .help   = "Include fsync at the end of job",
1342                 .def    = "0",
1343         },
1344         {
1345                 .name   = "fsync_on_close",
1346                 .type   = FIO_OPT_BOOL,
1347                 .off1   = td_var_offset(fsync_on_close),
1348                 .help   = "fsync files on close",
1349                 .def    = "0",
1350         },
1351         {
1352                 .name   = "unlink",
1353                 .type   = FIO_OPT_BOOL,
1354                 .off1   = td_var_offset(unlink),
1355                 .help   = "Unlink created files after job has completed",
1356                 .def    = "0",
1357         },
1358         {
1359                 .name   = "exitall",
1360                 .type   = FIO_OPT_STR_SET,
1361                 .cb     = str_exitall_cb,
1362                 .help   = "Terminate all jobs when one exits",
1363         },
1364         {
1365                 .name   = "stonewall",
1366                 .type   = FIO_OPT_STR_SET,
1367                 .off1   = td_var_offset(stonewall),
1368                 .help   = "Insert a hard barrier between this job and previous",
1369         },
1370         {
1371                 .name   = "new_group",
1372                 .type   = FIO_OPT_STR_SET,
1373                 .off1   = td_var_offset(new_group),
1374                 .help   = "Mark the start of a new group (for reporting)",
1375         },
1376         {
1377                 .name   = "thread",
1378                 .type   = FIO_OPT_STR_SET,
1379                 .off1   = td_var_offset(use_thread),
1380                 .help   = "Use threads instead of forks",
1381         },
1382         {
1383                 .name   = "write_bw_log",
1384                 .type   = FIO_OPT_STR,
1385                 .off1   = td_var_offset(write_bw_log),
1386                 .cb     = str_write_bw_log_cb,
1387                 .help   = "Write log of bandwidth during run",
1388         },
1389         {
1390                 .name   = "write_lat_log",
1391                 .type   = FIO_OPT_STR,
1392                 .off1   = td_var_offset(write_lat_log),
1393                 .cb     = str_write_lat_log_cb,
1394                 .help   = "Write log of latency during run",
1395         },
1396         {
1397                 .name   = "hugepage-size",
1398                 .type   = FIO_OPT_STR_VAL_INT,
1399                 .off1   = td_var_offset(hugepage_size),
1400                 .help   = "When using hugepages, specify size of each page",
1401                 .def    = __stringify(FIO_HUGE_PAGE),
1402         },
1403         {
1404                 .name   = "group_reporting",
1405                 .type   = FIO_OPT_STR_SET,
1406                 .off1   = td_var_offset(group_reporting),
1407                 .help   = "Do reporting on a per-group basis",
1408         },
1409         {
1410                 .name   = "zero_buffers",
1411                 .type   = FIO_OPT_STR_SET,
1412                 .off1   = td_var_offset(zero_buffers),
1413                 .help   = "Init IO buffers to all zeroes",
1414         },
1415         {
1416                 .name   = "refill_buffers",
1417                 .type   = FIO_OPT_STR_SET,
1418                 .off1   = td_var_offset(refill_buffers),
1419                 .help   = "Refill IO buffers on every IO submit",
1420         },
1421 #ifdef FIO_HAVE_DISK_UTIL
1422         {
1423                 .name   = "disk_util",
1424                 .type   = FIO_OPT_BOOL,
1425                 .off1   = td_var_offset(do_disk_util),
1426                 .help   = "Log disk utilization statistics",
1427                 .def    = "1",
1428         },
1429 #endif
1430         {
1431                 .name   = "gtod_reduce",
1432                 .type   = FIO_OPT_BOOL,
1433                 .help   = "Greatly reduce number of gettimeofday() calls",
1434                 .cb     = str_gtod_reduce_cb,
1435                 .def    = "0",
1436         },
1437         {
1438                 .name   = "disable_clat",
1439                 .type   = FIO_OPT_BOOL,
1440                 .off1   = td_var_offset(disable_clat),
1441                 .help   = "Disable completion latency numbers",
1442                 .parent = "gtod_reduce",
1443                 .def    = "0",
1444         },
1445         {
1446                 .name   = "disable_slat",
1447                 .type   = FIO_OPT_BOOL,
1448                 .off1   = td_var_offset(disable_slat),
1449                 .help   = "Disable submissionn latency numbers",
1450                 .parent = "gtod_reduce",
1451                 .def    = "0",
1452         },
1453         {
1454                 .name   = "disable_bw_measurement",
1455                 .type   = FIO_OPT_BOOL,
1456                 .off1   = td_var_offset(disable_bw),
1457                 .help   = "Disable bandwidth logging",
1458                 .parent = "gtod_reduce",
1459                 .def    = "0",
1460         },
1461         {
1462                 .name   = "gtod_cpu",
1463                 .type   = FIO_OPT_INT,
1464                 .cb     = str_gtod_cpu_cb,
1465                 .help   = "Setup dedicated gettimeofday() thread on this CPU",
1466         },
1467         {
1468                 .name = NULL,
1469         },
1470 };
1471
1472 void fio_options_dup_and_init(struct option *long_options)
1473 {
1474         struct fio_option *o;
1475         unsigned int i;
1476
1477         options_init(options);
1478
1479         i = 0;
1480         while (long_options[i].name)
1481                 i++;
1482
1483         o = &options[0];
1484         while (o->name) {
1485                 long_options[i].name = (char *) o->name;
1486                 long_options[i].val = FIO_GETOPT_JOB;
1487                 if (o->type == FIO_OPT_STR_SET)
1488                         long_options[i].has_arg = no_argument;
1489                 else
1490                         long_options[i].has_arg = required_argument;
1491
1492                 i++;
1493                 o++;
1494                 assert(i < FIO_NR_OPTIONS);
1495         }
1496 }
1497
1498 int fio_options_parse(struct thread_data *td, char **opts, int num_opts)
1499 {
1500         int i, ret;
1501
1502         sort_options(opts, options, num_opts);
1503
1504         for (ret = 0, i = 0; i < num_opts; i++)
1505                 ret |= parse_option(opts[i], options, td);
1506
1507         return ret;
1508 }
1509
1510 int fio_cmd_option_parse(struct thread_data *td, const char *opt, char *val)
1511 {
1512         return parse_cmd_option(opt, val, options, td);
1513 }
1514
1515 void fio_fill_default_options(struct thread_data *td)
1516 {
1517         fill_default_options(td, options);
1518 }
1519
1520 int fio_show_option_help(const char *opt)
1521 {
1522         return show_cmd_help(options, opt);
1523 }
1524
1525 static void __options_mem(struct thread_data *td, int alloc)
1526 {
1527         struct thread_options *o = &td->o;
1528         struct fio_option *opt;
1529         char **ptr;
1530         int i;
1531
1532         for (i = 0, opt = &options[0]; opt->name; i++, opt = &options[i]) {
1533                 if (opt->type != FIO_OPT_STR_STORE)
1534                         continue;
1535
1536                 ptr = (void *) o + opt->off1;
1537                 if (*ptr) {
1538                         if (alloc)
1539                                 *ptr = strdup(*ptr);
1540                         else {
1541                                 free(*ptr);
1542                                 *ptr = NULL;
1543                         }
1544                 }
1545         }
1546 }
1547
1548 /*
1549  * dupe FIO_OPT_STR_STORE options
1550  */
1551 void options_mem_dupe(struct thread_data *td)
1552 {
1553         __options_mem(td, 1);
1554 }
1555
1556 void options_mem_free(struct thread_data fio_unused *td)
1557 {
1558 #if 0
1559         __options_mem(td, 0);
1560 #endif
1561 }