init.c revision d56cbab065c01e1a177bc1b8d85a8f5d78df1548 
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 <assert.h>
13#include <sys/ipc.h>
14#include <sys/shm.h>
15#include <sys/types.h>
16#include <sys/stat.h>
17
18#include "fio.h"
19#include "parse.h"
20
21#define FIO_RANDSEED		(0xb1899bedUL)
22
23#define td_var_offset(var)	((size_t) &((struct thread_data *)0)->var)
24
25static int str_rw_cb(void *, const char *);
26static int str_ioengine_cb(void *, const char *);
27static int str_mem_cb(void *, const char *);
28static int str_verify_cb(void *, const char *);
29static int str_lockmem_cb(void *, unsigned long *);
30#ifdef FIO_HAVE_IOPRIO
31static int str_prio_cb(void *, unsigned int *);
32static int str_prioclass_cb(void *, unsigned int *);
33#endif
34static int str_exitall_cb(void);
35static int str_cpumask_cb(void *, unsigned int *);
36
37#define __stringify_1(x)	#x
38#define __stringify(x)		__stringify_1(x)
39
40/*
41 * Map of job/command line options
42 */
43static struct fio_option options[] = {
44	{
45		.name	= "name",
46		.type	= FIO_OPT_STR_STORE,
47		.off1	= td_var_offset(name),
48		.help	= "Name of this job",
49	},
50	{
51		.name	= "directory",
52		.type	= FIO_OPT_STR_STORE,
53		.off1	= td_var_offset(directory),
54		.help	= "Directory to store files in",
55	},
56	{
57		.name	= "filename",
58		.type	= FIO_OPT_STR_STORE,
59		.off1	= td_var_offset(filename),
60		.help	= "Force the use of a specific file",
61	},
62	{
63		.name	= "rw",
64		.type	= FIO_OPT_STR,
65		.cb	= str_rw_cb,
66		.help	= "IO direction",
67		.def	= "read",
68		.posval	= { "read", "write", "randwrite", "randread", "rw",
69				"randrw", },
70	},
71	{
72		.name	= "ioengine",
73		.type	= FIO_OPT_STR,
74		.cb	= str_ioengine_cb,
75		.help	= "IO engine to use",
76		.def	= "sync",
77		.posval	= { "sync", "libaio", "posixaio", "mmap", "splice",
78				"sg", "null", },
79	},
80	{
81		.name	= "iodepth",
82		.type	= FIO_OPT_INT,
83		.off1	= td_var_offset(iodepth),
84		.help	= "Amount of IO buffers to keep in flight",
85		.def	= "1",
86	},
87	{
88		.name	= "size",
89		.type	= FIO_OPT_STR_VAL,
90		.off1	= td_var_offset(total_file_size),
91		.help	= "Size of device or file",
92	},
93	{
94		.name	= "bs",
95		.type	= FIO_OPT_STR_VAL_INT,
96		.off1	= td_var_offset(bs[DDIR_READ]),
97		.off2	= td_var_offset(bs[DDIR_WRITE]),
98		.help	= "Block size unit",
99		.def	= "4k",
100	},
101	{
102		.name	= "bsrange",
103		.type	= FIO_OPT_RANGE,
104		.off1	= td_var_offset(min_bs[DDIR_READ]),
105		.off2	= td_var_offset(max_bs[DDIR_READ]),
106		.off3	= td_var_offset(min_bs[DDIR_WRITE]),
107		.off4	= td_var_offset(max_bs[DDIR_WRITE]),
108		.help	= "Set block size range (in more detail than bs)",
109	},
110	{
111		.name	= "bs_unaligned",
112		.type	= FIO_OPT_STR_SET,
113		.off1	= td_var_offset(bs_unaligned),
114		.help	= "Don't sector align IO buffer sizes",
115	},
116	{
117		.name	= "offset",
118		.type	= FIO_OPT_STR_VAL,
119		.off1	= td_var_offset(start_offset),
120		.help	= "Start IO from this offset",
121		.def	= "0",
122	},
123	{
124		.name	= "randrepeat",
125		.type	= FIO_OPT_BOOL,
126		.off1	= td_var_offset(rand_repeatable),
127		.help	= "Use repeatable random IO pattern",
128		.def	= "1",
129	},
130	{
131		.name	= "norandommap",
132		.type	= FIO_OPT_STR_SET,
133		.off1	= td_var_offset(norandommap),
134		.help	= "Accept potential duplicate random blocks",
135	},
136	{
137		.name	= "nrfiles",
138		.type	= FIO_OPT_INT,
139		.off1	= td_var_offset(nr_files),
140		.help	= "Split job workload between this number of files",
141		.def	= "1",
142	},
143	{
144		.name	= "fsync",
145		.type	= FIO_OPT_INT,
146		.off1	= td_var_offset(fsync_blocks),
147		.help	= "Issue fsync for writes every given number of blocks",
148		.def	= "0",
149	},
150	{
151		.name	= "direct",
152		.type	= FIO_OPT_BOOL,
153		.off1	= td_var_offset(odirect),
154		.help	= "Use O_DIRECT IO (negates buffered)",
155		.def	= "0",
156	},
157	{
158		.name	= "buffered",
159		.type	= FIO_OPT_BOOL,
160		.off1	= td_var_offset(odirect),
161		.neg	= 1,
162		.help	= "Use buffered IO (negates direct)",
163		.def	= "1",
164	},
165	{
166		.name	= "overwrite",
167		.type	= FIO_OPT_BOOL,
168		.off1	= td_var_offset(overwrite),
169		.help	= "When writing, set whether to overwrite current data",
170		.def	= "0",
171	},
172	{
173		.name	= "loops",
174		.type	= FIO_OPT_INT,
175		.off1	= td_var_offset(loops),
176		.help	= "Number of times to run the job",
177		.def	= "1",
178	},
179	{
180		.name	= "numjobs",
181		.type	= FIO_OPT_INT,
182		.off1	= td_var_offset(numjobs),
183		.help	= "Duplicate this job this many times",
184		.def	= "1",
185	},
186	{
187		.name	= "startdelay",
188		.type	= FIO_OPT_INT,
189		.off1	= td_var_offset(start_delay),
190		.help	= "Only start job when this period has passed",
191		.def	= "0",
192	},
193	{
194		.name	= "runtime",
195		.alias	= "timeout",
196		.type	= FIO_OPT_STR_VAL_TIME,
197		.off1	= td_var_offset(timeout),
198		.help	= "Stop workload when this amount of time has passed",
199		.def	= "0",
200	},
201	{
202		.name	= "mem",
203		.type	= FIO_OPT_STR,
204		.cb	= str_mem_cb,
205		.help	= "Backing type for IO buffers",
206		.def	= "malloc",
207		.posval	=  { "malloc", "shm", "shmhuge", "mmap", "mmaphuge", },
208	},
209	{
210		.name	= "verify",
211		.type	= FIO_OPT_STR,
212		.cb	= str_verify_cb,
213		.help	= "Verify sum function",
214		.def	= "0",
215		.posval	= { "crc32", "md5", },
216	},
217	{
218		.name	= "write_iolog",
219		.type	= FIO_OPT_STR_STORE,
220		.off1	= td_var_offset(write_iolog_file),
221		.help	= "Store IO pattern to file",
222	},
223	{
224		.name	= "read_iolog",
225		.type	= FIO_OPT_STR_STORE,
226		.off1	= td_var_offset(read_iolog_file),
227		.help	= "Playback IO pattern from file",
228	},
229	{
230		.name	= "exec_prerun",
231		.type	= FIO_OPT_STR_STORE,
232		.off1	= td_var_offset(exec_prerun),
233		.help	= "Execute this file prior to running job",
234	},
235	{
236		.name	= "exec_postrun",
237		.type	= FIO_OPT_STR_STORE,
238		.off1	= td_var_offset(exec_postrun),
239		.help	= "Execute this file after running job",
240	},
241#ifdef FIO_HAVE_IOSCHED_SWITCH
242	{
243		.name	= "ioscheduler",
244		.type	= FIO_OPT_STR_STORE,
245		.off1	= td_var_offset(ioscheduler),
246		.help	= "Use this IO scheduler on the backing device",
247	},
248#endif
249	{
250		.name	= "zonesize",
251		.type	= FIO_OPT_STR_VAL,
252		.off1	= td_var_offset(zone_size),
253		.help	= "Give size of an IO zone",
254		.def	= "0",
255	},
256	{
257		.name	= "zoneskip",
258		.type	= FIO_OPT_STR_VAL,
259		.off1	= td_var_offset(zone_skip),
260		.help	= "Space between IO zones",
261		.def	= "0",
262	},
263	{
264		.name	= "lockmem",
265		.type	= FIO_OPT_STR_VAL,
266		.cb	= str_lockmem_cb,
267		.help	= "Lock down this amount of memory",
268		.def	= "0",
269	},
270	{
271		.name	= "rwmixcycle",
272		.type	= FIO_OPT_INT,
273		.off1	= td_var_offset(rwmixcycle),
274		.help	= "Cycle period for mixed read/write workloads (msec)",
275		.def	= "500",
276	},
277	{
278		.name	= "rwmixread",
279		.type	= FIO_OPT_INT,
280		.off1	= td_var_offset(rwmixread),
281		.maxval	= 100,
282		.help	= "Percentage of mixed workload that is reads",
283		.def	= "50",
284	},
285	{
286		.name	= "rwmixwrite",
287		.type	= FIO_OPT_INT,
288		.off1	= td_var_offset(rwmixwrite),
289		.maxval	= 100,
290		.help	= "Percentage of mixed workload that is writes",
291		.def	= "50",
292	},
293	{
294		.name	= "nice",
295		.type	= FIO_OPT_INT,
296		.off1	= td_var_offset(nice),
297		.help	= "Set job CPU nice value",
298		.minval	= -19,
299		.maxval	= 20,
300		.def	= "0",
301	},
302#ifdef FIO_HAVE_IOPRIO
303	{
304		.name	= "prio",
305		.type	= FIO_OPT_INT,
306		.cb	= str_prio_cb,
307		.help	= "Set job IO priority value",
308		.minval	= 0,
309		.maxval	= 7,
310	},
311	{
312		.name	= "prioclass",
313		.type	= FIO_OPT_INT,
314		.cb	= str_prioclass_cb,
315		.help	= "Set job IO priority class",
316		.minval	= 0,
317		.maxval	= 3,
318	},
319#endif
320	{
321		.name	= "thinktime",
322		.type	= FIO_OPT_INT,
323		.off1	= td_var_offset(thinktime),
324		.help	= "Idle time between IO buffers (usec)",
325		.def	= "0",
326	},
327	{
328		.name	= "thinktime_blocks",
329		.type	= FIO_OPT_INT,
330		.off1	= td_var_offset(thinktime_blocks),
331		.help	= "IO buffer period between 'thinktime'",
332		.def	= "1",
333	},
334	{
335		.name	= "rate",
336		.type	= FIO_OPT_INT,
337		.off1	= td_var_offset(rate),
338		.help	= "Set bandwidth rate",
339	},
340	{
341		.name	= "ratemin",
342		.type	= FIO_OPT_INT,
343		.off1	= td_var_offset(ratemin),
344		.help	= "The bottom limit accepted",
345	},
346	{
347		.name	= "ratecycle",
348		.type	= FIO_OPT_INT,
349		.off1	= td_var_offset(ratecycle),
350		.help	= "Window average for rate limits (msec)",
351		.def	= "1000",
352	},
353	{
354		.name	= "invalidate",
355		.type	= FIO_OPT_BOOL,
356		.off1	= td_var_offset(invalidate_cache),
357		.help	= "Invalidate buffer/page cache prior to running job",
358		.def	= "1",
359	},
360	{
361		.name	= "sync",
362		.type	= FIO_OPT_BOOL,
363		.off1	= td_var_offset(sync_io),
364		.help	= "Use O_SYNC for buffered writes",
365		.def	= "0",
366	},
367	{
368		.name	= "bwavgtime",
369		.type	= FIO_OPT_INT,
370		.off1	= td_var_offset(bw_avg_time),
371		.help	= "Time window over which to calculate bandwidth (msec)",
372		.def	= "500",
373	},
374	{
375		.name	= "create_serialize",
376		.type	= FIO_OPT_BOOL,
377		.off1	= td_var_offset(create_serialize),
378		.help	= "Serialize creating of job files",
379		.def	= "1",
380	},
381	{
382		.name	= "create_fsync",
383		.type	= FIO_OPT_BOOL,
384		.off1	= td_var_offset(create_fsync),
385		.help	= "Fsync file after creation",
386		.def	= "1",
387	},
388	{
389		.name	= "cpuload",
390		.type	= FIO_OPT_INT,
391		.off1	= td_var_offset(cpuload),
392		.help	= "Use this percentage of CPU",
393	},
394	{
395		.name	= "cpuchunks",
396		.type	= FIO_OPT_INT,
397		.off1	= td_var_offset(cpucycle),
398		.help	= "Length of the CPU burn cycles",
399	},
400#ifdef FIO_HAVE_CPU_AFFINITY
401	{
402		.name	= "cpumask",
403		.type	= FIO_OPT_INT,
404		.cb	= str_cpumask_cb,
405		.help	= "CPU affinity mask",
406	},
407#endif
408	{
409		.name	= "end_fsync",
410		.type	= FIO_OPT_BOOL,
411		.off1	= td_var_offset(end_fsync),
412		.help	= "Include fsync at the end of job",
413		.def	= "0",
414	},
415	{
416		.name	= "unlink",
417		.type	= FIO_OPT_BOOL,
418		.off1	= td_var_offset(unlink),
419		.help	= "Unlink created files after job has completed",
420		.def	= "1",
421	},
422	{
423		.name	= "exitall",
424		.type	= FIO_OPT_STR_SET,
425		.cb	= str_exitall_cb,
426		.help	= "Terminate all jobs when one exits",
427	},
428	{
429		.name	= "stonewall",
430		.type	= FIO_OPT_STR_SET,
431		.off1	= td_var_offset(stonewall),
432		.help	= "Insert a hard barrier between this job and previous",
433	},
434	{
435		.name	= "thread",
436		.type	= FIO_OPT_STR_SET,
437		.off1	= td_var_offset(use_thread),
438		.help	= "Use threads instead of forks",
439	},
440	{
441		.name	= "write_bw_log",
442		.type	= FIO_OPT_STR_SET,
443		.off1	= td_var_offset(write_bw_log),
444		.help	= "Write log of bandwidth during run",
445	},
446	{
447		.name	= "write_lat_log",
448		.type	= FIO_OPT_STR_SET,
449		.off1	= td_var_offset(write_lat_log),
450		.help	= "Write log of latency during run",
451	},
452	{
453		.name	= "hugepage-size",
454		.type	= FIO_OPT_STR_VAL,
455		.off1	= td_var_offset(hugepage_size),
456		.help	= "When using hugepages, specify size of each page",
457		.def	= __stringify(FIO_HUGE_PAGE),
458	},
459	{
460		.name = NULL,
461	},
462};
463
464#define FIO_JOB_OPTS	(sizeof(options) / sizeof(struct fio_option))
465#define FIO_CMD_OPTS	(16)
466#define FIO_GETOPT_JOB	(0x89988998)
467
468/*
469 * Command line options. These will contain the above, plus a few
470 * extra that only pertain to fio itself and not jobs.
471 */
472static struct option long_options[FIO_JOB_OPTS + FIO_CMD_OPTS] = {
473	{
474		.name		= "output",
475		.has_arg	= required_argument,
476		.val		= 'o',
477	},
478	{
479		.name		= "timeout",
480		.has_arg	= required_argument,
481		.val		= 't',
482	},
483	{
484		.name		= "latency-log",
485		.has_arg	= required_argument,
486		.val		= 'l',
487	},
488	{
489		.name		= "bandwidth-log",
490		.has_arg	= required_argument,
491		.val		= 'b',
492	},
493	{
494		.name		= "minimal",
495		.has_arg	= optional_argument,
496		.val		= 'm',
497	},
498	{
499		.name		= "version",
500		.has_arg	= no_argument,
501		.val		= 'v',
502	},
503	{
504		.name		= "help",
505		.has_arg	= no_argument,
506		.val		= 'h',
507	},
508	{
509		.name		= "cmdhelp",
510		.has_arg	= required_argument,
511		.val		= 'c',
512	},
513	{
514		.name		= NULL,
515	},
516};
517
518static int def_timeout = 0;
519
520static char fio_version_string[] = "fio 1.11";
521
522static char **ini_file;
523static int max_jobs = MAX_JOBS;
524
525struct thread_data def_thread;
526struct thread_data *threads = NULL;
527
528int exitall_on_terminate = 0;
529int terse_output = 0;
530unsigned long long mlock_size = 0;
531FILE *f_out = NULL;
532FILE *f_err = NULL;
533
534static int write_lat_log = 0;
535static int write_bw_log = 0;
536
537/*
538 * Return a free job structure.
539 */
540static struct thread_data *get_new_job(int global, struct thread_data *parent)
541{
542	struct thread_data *td;
543
544	if (global)
545		return &def_thread;
546	if (thread_number >= max_jobs)
547		return NULL;
548
549	td = &threads[thread_number++];
550	*td = *parent;
551
552	td->thread_number = thread_number;
553	return td;
554}
555
556static void put_job(struct thread_data *td)
557{
558	if (td == &def_thread)
559		return;
560
561	memset(&threads[td->thread_number - 1], 0, sizeof(*td));
562	thread_number--;
563}
564
565/*
566 * Lazy way of fixing up options that depend on each other. We could also
567 * define option callback handlers, but this is easier.
568 */
569static void fixup_options(struct thread_data *td)
570{
571	if (!td->rwmixread && td->rwmixwrite)
572		td->rwmixread = 100 - td->rwmixwrite;
573
574	if (td->write_iolog_file && td->read_iolog_file) {
575		log_err("fio: read iolog overrides write_iolog\n");
576		free(td->write_iolog_file);
577		td->write_iolog_file = NULL;
578	}
579
580	if (td->io_ops->flags & FIO_SYNCIO)
581		td->iodepth = 1;
582	else {
583		if (!td->iodepth)
584			td->iodepth = td->nr_files;
585	}
586
587	/*
588	 * only really works for sequential io for now, and with 1 file
589	 */
590	if (td->zone_size && !td->sequential && td->nr_files == 1)
591		td->zone_size = 0;
592
593	/*
594	 * Reads can do overwrites, we always need to pre-create the file
595	 */
596	if (td_read(td) || td_rw(td))
597		td->overwrite = 1;
598
599	if (!td->min_bs[DDIR_READ])
600		td->min_bs[DDIR_READ]= td->bs[DDIR_READ];
601	if (!td->max_bs[DDIR_READ])
602		td->max_bs[DDIR_READ] = td->bs[DDIR_READ];
603	if (!td->min_bs[DDIR_WRITE])
604		td->min_bs[DDIR_WRITE]= td->bs[DDIR_WRITE];
605	if (!td->max_bs[DDIR_WRITE])
606		td->max_bs[DDIR_WRITE] = td->bs[DDIR_WRITE];
607
608	td->rw_min_bs = min(td->min_bs[DDIR_READ], td->min_bs[DDIR_WRITE]);
609
610	if (td_read(td) && !td_rw(td))
611		td->verify = 0;
612
613	if (td->norandommap && td->verify != VERIFY_NONE) {
614		log_err("fio: norandommap given, verify disabled\n");
615		td->verify = VERIFY_NONE;
616	}
617	if (td->bs_unaligned && (td->odirect || td->io_ops->flags & FIO_RAWIO))
618		log_err("fio: bs_unaligned may not work with raw io\n");
619
620	/*
621	 * O_DIRECT and char doesn't mix, clear that flag if necessary.
622	 */
623	if (td->filetype == FIO_TYPE_CHAR && td->odirect)
624		td->odirect = 0;
625}
626
627/*
628 * This function leaks the buffer
629 */
630static char *to_kmg(unsigned int val)
631{
632	char *buf = malloc(32);
633	char post[] = { 0, 'K', 'M', 'G', 'P', 0 };
634	char *p = post;
635
636	do {
637		if (val & 1023)
638			break;
639
640		val >>= 10;
641		p++;
642	} while (*p);
643
644	snprintf(buf, 31, "%u%c", val, *p);
645	return buf;
646}
647
648/*
649 * Adds a job to the list of things todo. Sanitizes the various options
650 * to make sure we don't have conflicts, and initializes various
651 * members of td.
652 */
653static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
654{
655	const char *ddir_str[] = { "read", "write", "randread", "randwrite",
656				   "rw", NULL, "randrw" };
657	struct stat sb;
658	int numjobs, ddir, i;
659	struct fio_file *f;
660
661	/*
662	 * the def_thread is just for options, it's not a real job
663	 */
664	if (td == &def_thread)
665		return 0;
666
667	assert(td->io_ops);
668
669	if (td->odirect)
670		td->io_ops->flags |= FIO_RAWIO;
671
672	td->filetype = FIO_TYPE_FILE;
673	if (!stat(jobname, &sb)) {
674		if (S_ISBLK(sb.st_mode))
675			td->filetype = FIO_TYPE_BD;
676		else if (S_ISCHR(sb.st_mode))
677			td->filetype = FIO_TYPE_CHAR;
678	}
679
680	fixup_options(td);
681
682	if (td->filename)
683		td->nr_uniq_files = 1;
684	else
685		td->nr_uniq_files = td->nr_files;
686
687	if (td->filetype == FIO_TYPE_FILE || td->filename) {
688		char tmp[PATH_MAX];
689		int len = 0;
690
691		if (td->directory && td->directory[0] != '\0')
692			len = sprintf(tmp, "%s/", td->directory);
693
694		td->files = malloc(sizeof(struct fio_file) * td->nr_files);
695
696		for_each_file(td, f, i) {
697			memset(f, 0, sizeof(*f));
698			f->fd = -1;
699
700			if (td->filename)
701				sprintf(tmp + len, "%s", td->filename);
702			else
703				sprintf(tmp + len, "%s.%d.%d", jobname, td->thread_number, i);
704			f->file_name = strdup(tmp);
705		}
706	} else {
707		td->nr_files = 1;
708		td->files = malloc(sizeof(struct fio_file));
709		f = &td->files[0];
710
711		memset(f, 0, sizeof(*f));
712		f->fd = -1;
713		f->file_name = strdup(jobname);
714	}
715
716	for_each_file(td, f, i) {
717		f->file_size = td->total_file_size / td->nr_files;
718		f->file_offset = td->start_offset;
719	}
720
721	fio_sem_init(&td->mutex, 0);
722
723	td->clat_stat[0].min_val = td->clat_stat[1].min_val = ULONG_MAX;
724	td->slat_stat[0].min_val = td->slat_stat[1].min_val = ULONG_MAX;
725	td->bw_stat[0].min_val = td->bw_stat[1].min_val = ULONG_MAX;
726
727	if (td->stonewall && td->thread_number > 1)
728		groupid++;
729
730	td->groupid = groupid;
731
732	if (setup_rate(td))
733		goto err;
734
735	if (td->write_lat_log) {
736		setup_log(&td->slat_log);
737		setup_log(&td->clat_log);
738	}
739	if (td->write_bw_log)
740		setup_log(&td->bw_log);
741
742	if (!td->name)
743		td->name = strdup(jobname);
744
745	ddir = td->ddir + (!td->sequential << 1) + (td->iomix << 2);
746
747	if (!terse_output) {
748		if (!job_add_num) {
749			if (td->io_ops->flags & FIO_CPUIO)
750				fprintf(f_out, "%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->name, td->cpuload, td->cpucycle);
751			else {
752				char *c1, *c2, *c3, *c4;
753
754				c1 = to_kmg(td->min_bs[DDIR_READ]);
755				c2 = to_kmg(td->max_bs[DDIR_READ]);
756				c3 = to_kmg(td->min_bs[DDIR_WRITE]);
757				c4 = to_kmg(td->max_bs[DDIR_WRITE]);
758
759				fprintf(f_out, "%s: (g=%d): rw=%s, bs=%s-%s/%s-%s, ioengine=%s, iodepth=%u\n", td->name, td->groupid, ddir_str[ddir], c1, c2, c3, c4, td->io_ops->name, td->iodepth);
760
761				free(c1);
762				free(c2);
763				free(c3);
764				free(c4);
765			}
766		} else if (job_add_num == 1)
767			fprintf(f_out, "...\n");
768	}
769
770	/*
771	 * recurse add identical jobs, clear numjobs and stonewall options
772	 * as they don't apply to sub-jobs
773	 */
774	numjobs = td->numjobs;
775	while (--numjobs) {
776		struct thread_data *td_new = get_new_job(0, td);
777
778		if (!td_new)
779			goto err;
780
781		td_new->numjobs = 1;
782		td_new->stonewall = 0;
783		job_add_num = numjobs - 1;
784
785		if (add_job(td_new, jobname, job_add_num))
786			goto err;
787	}
788	return 0;
789err:
790	put_job(td);
791	return -1;
792}
793
794/*
795 * Initialize the various random states we need (random io, block size ranges,
796 * read/write mix, etc).
797 */
798int init_random_state(struct thread_data *td)
799{
800	unsigned long seeds[4];
801	int fd, num_maps, blocks, i;
802	struct fio_file *f;
803
804	if (td->io_ops->flags & FIO_CPUIO)
805		return 0;
806
807	fd = open("/dev/urandom", O_RDONLY);
808	if (fd == -1) {
809		td_verror(td, errno);
810		return 1;
811	}
812
813	if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
814		td_verror(td, EIO);
815		close(fd);
816		return 1;
817	}
818
819	close(fd);
820
821	os_random_seed(seeds[0], &td->bsrange_state);
822	os_random_seed(seeds[1], &td->verify_state);
823	os_random_seed(seeds[2], &td->rwmix_state);
824
825	if (td->sequential)
826		return 0;
827
828	if (td->rand_repeatable)
829		seeds[3] = FIO_RANDSEED;
830
831	if (!td->norandommap) {
832		for_each_file(td, f, i) {
833			blocks = (f->file_size + td->rw_min_bs - 1) / td->rw_min_bs;
834			num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
835			f->file_map = malloc(num_maps * sizeof(long));
836			f->num_maps = num_maps;
837			memset(f->file_map, 0, num_maps * sizeof(long));
838		}
839	}
840
841	os_random_seed(seeds[3], &td->random_state);
842	return 0;
843}
844
845static void fill_cpu_mask(os_cpu_mask_t cpumask, int cpu)
846{
847#ifdef FIO_HAVE_CPU_AFFINITY
848	unsigned int i;
849
850	CPU_ZERO(&cpumask);
851
852	for (i = 0; i < sizeof(int) * 8; i++) {
853		if ((1 << i) & cpu)
854			CPU_SET(i, &cpumask);
855	}
856#endif
857}
858
859static int is_empty_or_comment(char *line)
860{
861	unsigned int i;
862
863	for (i = 0; i < strlen(line); i++) {
864		if (line[i] == ';')
865			return 1;
866		if (!isspace(line[i]) && !iscntrl(line[i]))
867			return 0;
868	}
869
870	return 1;
871}
872
873static int str_rw_cb(void *data, const char *mem)
874{
875	struct thread_data *td = data;
876
877	if (!strncmp(mem, "read", 4) || !strncmp(mem, "0", 1)) {
878		td->ddir = DDIR_READ;
879		td->sequential = 1;
880		return 0;
881	} else if (!strncmp(mem, "randread", 8)) {
882		td->ddir = DDIR_READ;
883		td->sequential = 0;
884		return 0;
885	} else if (!strncmp(mem, "write", 5) || !strncmp(mem, "1", 1)) {
886		td->ddir = DDIR_WRITE;
887		td->sequential = 1;
888		return 0;
889	} else if (!strncmp(mem, "randwrite", 9)) {
890		td->ddir = DDIR_WRITE;
891		td->sequential = 0;
892		return 0;
893	} else if (!strncmp(mem, "rw", 2)) {
894		td->ddir = DDIR_READ;
895		td->iomix = 1;
896		td->sequential = 1;
897		return 0;
898	} else if (!strncmp(mem, "randrw", 6)) {
899		td->ddir = DDIR_READ;
900		td->iomix = 1;
901		td->sequential = 0;
902		return 0;
903	}
904
905	log_err("fio: data direction: read, write, randread, randwrite, rw, randrw\n");
906	return 1;
907}
908
909static int str_verify_cb(void *data, const char *mem)
910{
911	struct thread_data *td = data;
912
913	if (!strncmp(mem, "0", 1)) {
914		td->verify = VERIFY_NONE;
915		return 0;
916	} else if (!strncmp(mem, "md5", 3) || !strncmp(mem, "1", 1)) {
917		td->verify = VERIFY_MD5;
918		return 0;
919	} else if (!strncmp(mem, "crc32", 5)) {
920		td->verify = VERIFY_CRC32;
921		return 0;
922	}
923
924	log_err("fio: verify types: md5, crc32\n");
925	return 1;
926}
927
928/*
929 * Check if mmap/mmaphuge has a :/foo/bar/file at the end. If so, return that.
930 */
931static char *get_mmap_file(const char *str)
932{
933	char *p = strstr(str, ":");
934
935	if (!p)
936		return NULL;
937
938	p++;
939	strip_blank_front(&p);
940	strip_blank_end(p);
941	return strdup(p);
942}
943
944static int str_mem_cb(void *data, const char *mem)
945{
946	struct thread_data *td = data;
947
948	if (!strncmp(mem, "malloc", 6)) {
949		td->mem_type = MEM_MALLOC;
950		return 0;
951	} else if (!strncmp(mem, "mmaphuge", 8)) {
952#ifdef FIO_HAVE_HUGETLB
953		/*
954		 * mmaphuge must be appended with the actual file
955		 */
956		td->mmapfile = get_mmap_file(mem);
957		if (!td->mmapfile) {
958			log_err("fio: mmaphuge:/path/to/file\n");
959			return 1;
960		}
961
962		td->mem_type = MEM_MMAPHUGE;
963		return 0;
964#else
965		log_err("fio: mmaphuge not available\n");
966		return 1;
967#endif
968	} else if (!strncmp(mem, "mmap", 4)) {
969		/*
970		 * Check if the user wants file backed memory. It's ok
971		 * if there's no file given, we'll just use anon mamp then.
972		 */
973		td->mmapfile = get_mmap_file(mem);
974		td->mem_type = MEM_MMAP;
975		return 0;
976	} else if (!strncmp(mem, "shmhuge", 7)) {
977#ifdef FIO_HAVE_HUGETLB
978		td->mem_type = MEM_SHMHUGE;
979		return 0;
980#else
981		log_err("fio: shmhuge not available\n");
982		return 1;
983#endif
984	} else if (!strncmp(mem, "shm", 3)) {
985		td->mem_type = MEM_SHM;
986		return 0;
987	}
988
989	log_err("fio: mem type: malloc, shm, shmhuge, mmap, mmaphuge\n");
990	return 1;
991}
992
993static int str_ioengine_cb(void *data, const char *str)
994{
995	struct thread_data *td = data;
996
997	td->io_ops = load_ioengine(td, str);
998	if (td->io_ops)
999		return 0;
1000
1001	log_err("fio: ioengine= libaio, posixaio, sync, mmap, sgio, splice, cpu, null\n");
1002	log_err("fio: or specify path to dynamic ioengine module\n");
1003	return 1;
1004}
1005
1006static int str_lockmem_cb(void fio_unused *data, unsigned long *val)
1007{
1008	mlock_size = *val;
1009	return 0;
1010}
1011
1012#ifdef FIO_HAVE_IOPRIO
1013static int str_prioclass_cb(void *data, unsigned int *val)
1014{
1015	struct thread_data *td = data;
1016
1017	td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
1018	return 0;
1019}
1020
1021static int str_prio_cb(void *data, unsigned int *val)
1022{
1023	struct thread_data *td = data;
1024
1025	td->ioprio |= *val;
1026	return 0;
1027}
1028#endif
1029
1030static int str_exitall_cb(void)
1031{
1032	exitall_on_terminate = 1;
1033	return 0;
1034}
1035
1036static int str_cpumask_cb(void *data, unsigned int *val)
1037{
1038	struct thread_data *td = data;
1039
1040	fill_cpu_mask(td->cpumask, *val);
1041	return 0;
1042}
1043
1044/*
1045 * This is our [ini] type file parser.
1046 */
1047static int parse_jobs_ini(char *file, int stonewall_flag)
1048{
1049	unsigned int global;
1050	struct thread_data *td;
1051	char *string, *name;
1052	fpos_t off;
1053	FILE *f;
1054	char *p;
1055	int ret = 0, stonewall;
1056
1057	f = fopen(file, "r");
1058	if (!f) {
1059		perror("fopen job file");
1060		return 1;
1061	}
1062
1063	string = malloc(4096);
1064	name = malloc(256);
1065	memset(name, 0, 256);
1066
1067	stonewall = stonewall_flag;
1068	do {
1069		p = fgets(string, 4095, f);
1070		if (!p)
1071			break;
1072		if (is_empty_or_comment(p))
1073			continue;
1074		if (sscanf(p, "[%255s]", name) != 1)
1075			continue;
1076
1077		global = !strncmp(name, "global", 6);
1078
1079		name[strlen(name) - 1] = '\0';
1080
1081		td = get_new_job(global, &def_thread);
1082		if (!td) {
1083			ret = 1;
1084			break;
1085		}
1086
1087		/*
1088		 * Seperate multiple job files by a stonewall
1089		 */
1090		if (!global && stonewall) {
1091			td->stonewall = stonewall;
1092			stonewall = 0;
1093		}
1094
1095		fgetpos(f, &off);
1096		while ((p = fgets(string, 4096, f)) != NULL) {
1097			if (is_empty_or_comment(p))
1098				continue;
1099
1100			strip_blank_front(&p);
1101
1102			if (p[0] == '[')
1103				break;
1104
1105			strip_blank_end(p);
1106
1107			fgetpos(f, &off);
1108
1109			/*
1110			 * Don't break here, continue parsing options so we
1111			 * dump all the bad ones. Makes trial/error fixups
1112			 * easier on the user.
1113			 */
1114			ret |= parse_option(p, options, td);
1115		}
1116
1117		if (!ret) {
1118			fsetpos(f, &off);
1119			ret = add_job(td, name, 0);
1120		} else {
1121			log_err("fio: job %s dropped\n", name);
1122			put_job(td);
1123		}
1124	} while (!ret);
1125
1126	free(string);
1127	free(name);
1128	fclose(f);
1129	return ret;
1130}
1131
1132static int fill_def_thread(void)
1133{
1134	memset(&def_thread, 0, sizeof(def_thread));
1135
1136	if (fio_getaffinity(getpid(), &def_thread.cpumask) == -1) {
1137		perror("sched_getaffinity");
1138		return 1;
1139	}
1140
1141	/*
1142	 * fill default options
1143	 */
1144	fill_default_options(&def_thread, options);
1145
1146	def_thread.timeout = def_timeout;
1147	def_thread.write_bw_log = write_bw_log;
1148	def_thread.write_lat_log = write_lat_log;
1149
1150#ifdef FIO_HAVE_DISK_UTIL
1151	def_thread.do_disk_util = 1;
1152#endif
1153
1154	return 0;
1155}
1156
1157static void usage(void)
1158{
1159	printf("%s\n", fio_version_string);
1160	printf("\t--output\tWrite output to file\n");
1161	printf("\t--timeout\tRuntime in seconds\n");
1162	printf("\t--latency-log\tGenerate per-job latency logs\n");
1163	printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
1164	printf("\t--minimal\tMinimal (terse) output\n");
1165	printf("\t--version\tPrint version info and exit\n");
1166	printf("\t--help\t\tPrint this page\n");
1167	printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of them\n");
1168}
1169
1170static int parse_cmd_line(int argc, char *argv[])
1171{
1172	struct thread_data *td = NULL;
1173	int c, ini_idx = 0, lidx, ret;
1174
1175	while ((c = getopt_long(argc, argv, "", long_options, &lidx)) != -1) {
1176		switch (c) {
1177		case 't':
1178			def_timeout = atoi(optarg);
1179			break;
1180		case 'l':
1181			write_lat_log = 1;
1182			break;
1183		case 'w':
1184			write_bw_log = 1;
1185			break;
1186		case 'o':
1187			f_out = fopen(optarg, "w+");
1188			if (!f_out) {
1189				perror("fopen output");
1190				exit(1);
1191			}
1192			f_err = f_out;
1193			break;
1194		case 'm':
1195			terse_output = 1;
1196			break;
1197		case 'h':
1198			usage();
1199			exit(0);
1200		case 'c':
1201			ret = show_cmd_help(options, optarg);
1202			exit(ret);
1203		case 'v':
1204			printf("%s\n", fio_version_string);
1205			exit(0);
1206		case FIO_GETOPT_JOB: {
1207			const char *opt = long_options[lidx].name;
1208			char *val = optarg;
1209
1210			if (!strncmp(opt, "name", 4) && td) {
1211				ret = add_job(td, td->name ?: "fio", 0);
1212				if (ret) {
1213					put_job(td);
1214					return 0;
1215				}
1216				td = NULL;
1217			}
1218			if (!td) {
1219				int global = !strncmp(val, "global", 6);
1220
1221				td = get_new_job(global, &def_thread);
1222				if (!td)
1223					return 0;
1224			}
1225
1226			ret = parse_cmd_option(opt, val, options, td);
1227			if (ret) {
1228				log_err("fio: job dropped\n");
1229				put_job(td);
1230				td = NULL;
1231			}
1232			break;
1233		}
1234		default:
1235			break;
1236		}
1237	}
1238
1239	if (td) {
1240		ret = add_job(td, td->name ?: "fio", 0);
1241		if (ret)
1242			put_job(td);
1243	}
1244
1245	while (optind < argc) {
1246		ini_idx++;
1247		ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1248		ini_file[ini_idx - 1] = strdup(argv[optind]);
1249		optind++;
1250	}
1251
1252	return ini_idx;
1253}
1254
1255static void free_shm(void)
1256{
1257	struct shmid_ds sbuf;
1258
1259	if (threads) {
1260		shmdt((void *) threads);
1261		threads = NULL;
1262		shmctl(shm_id, IPC_RMID, &sbuf);
1263	}
1264}
1265
1266/*
1267 * The thread area is shared between the main process and the job
1268 * threads/processes. So setup a shared memory segment that will hold
1269 * all the job info.
1270 */
1271static int setup_thread_area(void)
1272{
1273	/*
1274	 * 1024 is too much on some machines, scale max_jobs if
1275	 * we get a failure that looks like too large a shm segment
1276	 */
1277	do {
1278		size_t size = max_jobs * sizeof(struct thread_data);
1279
1280		shm_id = shmget(0, size, IPC_CREAT | 0600);
1281		if (shm_id != -1)
1282			break;
1283		if (errno != EINVAL) {
1284			perror("shmget");
1285			break;
1286		}
1287
1288		max_jobs >>= 1;
1289	} while (max_jobs);
1290
1291	if (shm_id == -1)
1292		return 1;
1293
1294	threads = shmat(shm_id, NULL, 0);
1295	if (threads == (void *) -1) {
1296		perror("shmat");
1297		return 1;
1298	}
1299
1300	atexit(free_shm);
1301	return 0;
1302}
1303
1304/*
1305 * Copy the fio options into the long options map, so we mirror
1306 * job and cmd line options.
1307 */
1308static void dupe_job_options(void)
1309{
1310	struct fio_option *o;
1311	unsigned int i;
1312
1313	i = 0;
1314	while (long_options[i].name)
1315		i++;
1316
1317	o = &options[0];
1318	while (o->name) {
1319		long_options[i].name = o->name;
1320		long_options[i].val = FIO_GETOPT_JOB;
1321		if (o->type == FIO_OPT_STR_SET)
1322			long_options[i].has_arg = no_argument;
1323		else
1324			long_options[i].has_arg = required_argument;
1325
1326		i++;
1327		o++;
1328		assert(i < FIO_JOB_OPTS + FIO_CMD_OPTS);
1329	}
1330}
1331
1332int parse_options(int argc, char *argv[])
1333{
1334	int job_files, i;
1335
1336	f_out = stdout;
1337	f_err = stderr;
1338
1339	options_init(options);
1340
1341	dupe_job_options();
1342
1343	if (setup_thread_area())
1344		return 1;
1345	if (fill_def_thread())
1346		return 1;
1347
1348	job_files = parse_cmd_line(argc, argv);
1349
1350	for (i = 0; i < job_files; i++) {
1351		if (fill_def_thread())
1352			return 1;
1353		if (parse_jobs_ini(ini_file[i], i))
1354			return 1;
1355		free(ini_file[i]);
1356	}
1357
1358	free(ini_file);
1359
1360	if (!thread_number) {
1361		log_err("No jobs defined(s)\n");
1362		return 1;
1363	}
1364
1365	return 0;
1366}
1367