init.c revision f3502ba2dd72d846a388c774a01c6bb833871248 
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	= "description",
46		.type	= FIO_OPT_STR_STORE,
47		.off1	= td_var_offset(description),
48		.help	= "Text job description",
49	},
50	{
51		.name	= "name",
52		.type	= FIO_OPT_STR_STORE,
53		.off1	= td_var_offset(name),
54		.help	= "Name of this job",
55	},
56	{
57		.name	= "directory",
58		.type	= FIO_OPT_STR_STORE,
59		.off1	= td_var_offset(directory),
60		.help	= "Directory to store files in",
61	},
62	{
63		.name	= "filename",
64		.type	= FIO_OPT_STR_STORE,
65		.off1	= td_var_offset(filename),
66		.help	= "Force the use of a specific file",
67	},
68	{
69		.name	= "rw",
70		.type	= FIO_OPT_STR,
71		.cb	= str_rw_cb,
72		.help	= "IO direction",
73		.def	= "read",
74		.posval	= { "read", "write", "randwrite", "randread", "rw",
75				"randrw", },
76	},
77	{
78		.name	= "ioengine",
79		.type	= FIO_OPT_STR,
80		.cb	= str_ioengine_cb,
81		.help	= "IO engine to use",
82		.def	= "sync",
83		.posval	= { "sync", "libaio", "posixaio", "mmap", "splice",
84				"sg", "null", "net", "syslet-rw" },
85	},
86	{
87		.name	= "iodepth",
88		.type	= FIO_OPT_INT,
89		.off1	= td_var_offset(iodepth),
90		.help	= "Amount of IO buffers to keep in flight",
91		.def	= "1",
92	},
93	{
94		.name	= "size",
95		.type	= FIO_OPT_STR_VAL,
96		.off1	= td_var_offset(total_file_size),
97		.help	= "Size of device or file",
98	},
99	{
100		.name	= "bs",
101		.type	= FIO_OPT_STR_VAL_INT,
102		.off1	= td_var_offset(bs[DDIR_READ]),
103		.off2	= td_var_offset(bs[DDIR_WRITE]),
104		.help	= "Block size unit",
105		.def	= "4k",
106	},
107	{
108		.name	= "bsrange",
109		.type	= FIO_OPT_RANGE,
110		.off1	= td_var_offset(min_bs[DDIR_READ]),
111		.off2	= td_var_offset(max_bs[DDIR_READ]),
112		.off3	= td_var_offset(min_bs[DDIR_WRITE]),
113		.off4	= td_var_offset(max_bs[DDIR_WRITE]),
114		.help	= "Set block size range (in more detail than bs)",
115	},
116	{
117		.name	= "bs_unaligned",
118		.type	= FIO_OPT_STR_SET,
119		.off1	= td_var_offset(bs_unaligned),
120		.help	= "Don't sector align IO buffer sizes",
121	},
122	{
123		.name	= "offset",
124		.type	= FIO_OPT_STR_VAL,
125		.off1	= td_var_offset(start_offset),
126		.help	= "Start IO from this offset",
127		.def	= "0",
128	},
129	{
130		.name	= "randrepeat",
131		.type	= FIO_OPT_BOOL,
132		.off1	= td_var_offset(rand_repeatable),
133		.help	= "Use repeatable random IO pattern",
134		.def	= "1",
135	},
136	{
137		.name	= "norandommap",
138		.type	= FIO_OPT_STR_SET,
139		.off1	= td_var_offset(norandommap),
140		.help	= "Accept potential duplicate random blocks",
141	},
142	{
143		.name	= "nrfiles",
144		.type	= FIO_OPT_INT,
145		.off1	= td_var_offset(nr_files),
146		.help	= "Split job workload between this number of files",
147		.def	= "1",
148	},
149	{
150		.name	= "fsync",
151		.type	= FIO_OPT_INT,
152		.off1	= td_var_offset(fsync_blocks),
153		.help	= "Issue fsync for writes every given number of blocks",
154		.def	= "0",
155	},
156	{
157		.name	= "direct",
158		.type	= FIO_OPT_BOOL,
159		.off1	= td_var_offset(odirect),
160		.help	= "Use O_DIRECT IO (negates buffered)",
161		.def	= "0",
162	},
163	{
164		.name	= "buffered",
165		.type	= FIO_OPT_BOOL,
166		.off1	= td_var_offset(odirect),
167		.neg	= 1,
168		.help	= "Use buffered IO (negates direct)",
169		.def	= "1",
170	},
171	{
172		.name	= "overwrite",
173		.type	= FIO_OPT_BOOL,
174		.off1	= td_var_offset(overwrite),
175		.help	= "When writing, set whether to overwrite current data",
176		.def	= "0",
177	},
178	{
179		.name	= "loops",
180		.type	= FIO_OPT_INT,
181		.off1	= td_var_offset(loops),
182		.help	= "Number of times to run the job",
183		.def	= "1",
184	},
185	{
186		.name	= "numjobs",
187		.type	= FIO_OPT_INT,
188		.off1	= td_var_offset(numjobs),
189		.help	= "Duplicate this job this many times",
190		.def	= "1",
191	},
192	{
193		.name	= "startdelay",
194		.type	= FIO_OPT_INT,
195		.off1	= td_var_offset(start_delay),
196		.help	= "Only start job when this period has passed",
197		.def	= "0",
198	},
199	{
200		.name	= "runtime",
201		.alias	= "timeout",
202		.type	= FIO_OPT_STR_VAL_TIME,
203		.off1	= td_var_offset(timeout),
204		.help	= "Stop workload when this amount of time has passed",
205		.def	= "0",
206	},
207	{
208		.name	= "mem",
209		.type	= FIO_OPT_STR,
210		.cb	= str_mem_cb,
211		.help	= "Backing type for IO buffers",
212		.def	= "malloc",
213		.posval	=  { "malloc", "shm", "shmhuge", "mmap", "mmaphuge", },
214	},
215	{
216		.name	= "verify",
217		.type	= FIO_OPT_STR,
218		.cb	= str_verify_cb,
219		.help	= "Verify sum function",
220		.def	= "0",
221		.posval	= { "crc32", "md5", },
222	},
223	{
224		.name	= "write_iolog",
225		.type	= FIO_OPT_STR_STORE,
226		.off1	= td_var_offset(write_iolog_file),
227		.help	= "Store IO pattern to file",
228	},
229	{
230		.name	= "read_iolog",
231		.type	= FIO_OPT_STR_STORE,
232		.off1	= td_var_offset(read_iolog_file),
233		.help	= "Playback IO pattern from file",
234	},
235	{
236		.name	= "exec_prerun",
237		.type	= FIO_OPT_STR_STORE,
238		.off1	= td_var_offset(exec_prerun),
239		.help	= "Execute this file prior to running job",
240	},
241	{
242		.name	= "exec_postrun",
243		.type	= FIO_OPT_STR_STORE,
244		.off1	= td_var_offset(exec_postrun),
245		.help	= "Execute this file after running job",
246	},
247#ifdef FIO_HAVE_IOSCHED_SWITCH
248	{
249		.name	= "ioscheduler",
250		.type	= FIO_OPT_STR_STORE,
251		.off1	= td_var_offset(ioscheduler),
252		.help	= "Use this IO scheduler on the backing device",
253	},
254#endif
255	{
256		.name	= "zonesize",
257		.type	= FIO_OPT_STR_VAL,
258		.off1	= td_var_offset(zone_size),
259		.help	= "Give size of an IO zone",
260		.def	= "0",
261	},
262	{
263		.name	= "zoneskip",
264		.type	= FIO_OPT_STR_VAL,
265		.off1	= td_var_offset(zone_skip),
266		.help	= "Space between IO zones",
267		.def	= "0",
268	},
269	{
270		.name	= "lockmem",
271		.type	= FIO_OPT_STR_VAL,
272		.cb	= str_lockmem_cb,
273		.help	= "Lock down this amount of memory",
274		.def	= "0",
275	},
276	{
277		.name	= "rwmixcycle",
278		.type	= FIO_OPT_INT,
279		.off1	= td_var_offset(rwmixcycle),
280		.help	= "Cycle period for mixed read/write workloads (msec)",
281		.def	= "500",
282	},
283	{
284		.name	= "rwmixread",
285		.type	= FIO_OPT_INT,
286		.off1	= td_var_offset(rwmixread),
287		.maxval	= 100,
288		.help	= "Percentage of mixed workload that is reads",
289		.def	= "50",
290	},
291	{
292		.name	= "rwmixwrite",
293		.type	= FIO_OPT_INT,
294		.off1	= td_var_offset(rwmixwrite),
295		.maxval	= 100,
296		.help	= "Percentage of mixed workload that is writes",
297		.def	= "50",
298	},
299	{
300		.name	= "nice",
301		.type	= FIO_OPT_INT,
302		.off1	= td_var_offset(nice),
303		.help	= "Set job CPU nice value",
304		.minval	= -19,
305		.maxval	= 20,
306		.def	= "0",
307	},
308#ifdef FIO_HAVE_IOPRIO
309	{
310		.name	= "prio",
311		.type	= FIO_OPT_INT,
312		.cb	= str_prio_cb,
313		.help	= "Set job IO priority value",
314		.minval	= 0,
315		.maxval	= 7,
316	},
317	{
318		.name	= "prioclass",
319		.type	= FIO_OPT_INT,
320		.cb	= str_prioclass_cb,
321		.help	= "Set job IO priority class",
322		.minval	= 0,
323		.maxval	= 3,
324	},
325#endif
326	{
327		.name	= "thinktime",
328		.type	= FIO_OPT_INT,
329		.off1	= td_var_offset(thinktime),
330		.help	= "Idle time between IO buffers (usec)",
331		.def	= "0",
332	},
333	{
334		.name	= "thinktime_blocks",
335		.type	= FIO_OPT_INT,
336		.off1	= td_var_offset(thinktime_blocks),
337		.help	= "IO buffer period between 'thinktime'",
338		.def	= "1",
339	},
340	{
341		.name	= "rate",
342		.type	= FIO_OPT_INT,
343		.off1	= td_var_offset(rate),
344		.help	= "Set bandwidth rate",
345	},
346	{
347		.name	= "ratemin",
348		.type	= FIO_OPT_INT,
349		.off1	= td_var_offset(ratemin),
350		.help	= "The bottom limit accepted",
351	},
352	{
353		.name	= "ratecycle",
354		.type	= FIO_OPT_INT,
355		.off1	= td_var_offset(ratecycle),
356		.help	= "Window average for rate limits (msec)",
357		.def	= "1000",
358	},
359	{
360		.name	= "invalidate",
361		.type	= FIO_OPT_BOOL,
362		.off1	= td_var_offset(invalidate_cache),
363		.help	= "Invalidate buffer/page cache prior to running job",
364		.def	= "1",
365	},
366	{
367		.name	= "sync",
368		.type	= FIO_OPT_BOOL,
369		.off1	= td_var_offset(sync_io),
370		.help	= "Use O_SYNC for buffered writes",
371		.def	= "0",
372	},
373	{
374		.name	= "bwavgtime",
375		.type	= FIO_OPT_INT,
376		.off1	= td_var_offset(bw_avg_time),
377		.help	= "Time window over which to calculate bandwidth (msec)",
378		.def	= "500",
379	},
380	{
381		.name	= "create_serialize",
382		.type	= FIO_OPT_BOOL,
383		.off1	= td_var_offset(create_serialize),
384		.help	= "Serialize creating of job files",
385		.def	= "1",
386	},
387	{
388		.name	= "create_fsync",
389		.type	= FIO_OPT_BOOL,
390		.off1	= td_var_offset(create_fsync),
391		.help	= "Fsync file after creation",
392		.def	= "1",
393	},
394	{
395		.name	= "cpuload",
396		.type	= FIO_OPT_INT,
397		.off1	= td_var_offset(cpuload),
398		.help	= "Use this percentage of CPU",
399	},
400	{
401		.name	= "cpuchunks",
402		.type	= FIO_OPT_INT,
403		.off1	= td_var_offset(cpucycle),
404		.help	= "Length of the CPU burn cycles",
405	},
406#ifdef FIO_HAVE_CPU_AFFINITY
407	{
408		.name	= "cpumask",
409		.type	= FIO_OPT_INT,
410		.cb	= str_cpumask_cb,
411		.help	= "CPU affinity mask",
412	},
413#endif
414	{
415		.name	= "end_fsync",
416		.type	= FIO_OPT_BOOL,
417		.off1	= td_var_offset(end_fsync),
418		.help	= "Include fsync at the end of job",
419		.def	= "0",
420	},
421	{
422		.name	= "unlink",
423		.type	= FIO_OPT_BOOL,
424		.off1	= td_var_offset(unlink),
425		.help	= "Unlink created files after job has completed",
426		.def	= "0",
427	},
428	{
429		.name	= "exitall",
430		.type	= FIO_OPT_STR_SET,
431		.cb	= str_exitall_cb,
432		.help	= "Terminate all jobs when one exits",
433	},
434	{
435		.name	= "stonewall",
436		.type	= FIO_OPT_STR_SET,
437		.off1	= td_var_offset(stonewall),
438		.help	= "Insert a hard barrier between this job and previous",
439	},
440	{
441		.name	= "thread",
442		.type	= FIO_OPT_STR_SET,
443		.off1	= td_var_offset(use_thread),
444		.help	= "Use threads instead of forks",
445	},
446	{
447		.name	= "write_bw_log",
448		.type	= FIO_OPT_STR_SET,
449		.off1	= td_var_offset(write_bw_log),
450		.help	= "Write log of bandwidth during run",
451	},
452	{
453		.name	= "write_lat_log",
454		.type	= FIO_OPT_STR_SET,
455		.off1	= td_var_offset(write_lat_log),
456		.help	= "Write log of latency during run",
457	},
458	{
459		.name	= "hugepage-size",
460		.type	= FIO_OPT_STR_VAL,
461		.off1	= td_var_offset(hugepage_size),
462		.help	= "When using hugepages, specify size of each page",
463		.def	= __stringify(FIO_HUGE_PAGE),
464	},
465	{
466		.name = NULL,
467	},
468};
469
470#define FIO_JOB_OPTS	(sizeof(options) / sizeof(struct fio_option))
471#define FIO_CMD_OPTS	(16)
472#define FIO_GETOPT_JOB	(0x89988998)
473
474/*
475 * Command line options. These will contain the above, plus a few
476 * extra that only pertain to fio itself and not jobs.
477 */
478static struct option long_options[FIO_JOB_OPTS + FIO_CMD_OPTS] = {
479	{
480		.name		= "output",
481		.has_arg	= required_argument,
482		.val		= 'o',
483	},
484	{
485		.name		= "timeout",
486		.has_arg	= required_argument,
487		.val		= 't',
488	},
489	{
490		.name		= "latency-log",
491		.has_arg	= required_argument,
492		.val		= 'l',
493	},
494	{
495		.name		= "bandwidth-log",
496		.has_arg	= required_argument,
497		.val		= 'b',
498	},
499	{
500		.name		= "minimal",
501		.has_arg	= optional_argument,
502		.val		= 'm',
503	},
504	{
505		.name		= "version",
506		.has_arg	= no_argument,
507		.val		= 'v',
508	},
509	{
510		.name		= "help",
511		.has_arg	= no_argument,
512		.val		= 'h',
513	},
514	{
515		.name		= "cmdhelp",
516		.has_arg	= required_argument,
517		.val		= 'c',
518	},
519	{
520		.name		= NULL,
521	},
522};
523
524static int def_timeout = 0;
525
526static char fio_version_string[] = "fio 1.11";
527
528static char **ini_file;
529static int max_jobs = MAX_JOBS;
530
531struct thread_data def_thread;
532struct thread_data *threads = NULL;
533
534int exitall_on_terminate = 0;
535int terse_output = 0;
536unsigned long long mlock_size = 0;
537FILE *f_out = NULL;
538FILE *f_err = NULL;
539
540static int write_lat_log = 0;
541int write_bw_log = 0;
542
543/*
544 * Return a free job structure.
545 */
546static struct thread_data *get_new_job(int global, struct thread_data *parent)
547{
548	struct thread_data *td;
549
550	if (global)
551		return &def_thread;
552	if (thread_number >= max_jobs)
553		return NULL;
554
555	td = &threads[thread_number++];
556	*td = *parent;
557
558	td->thread_number = thread_number;
559	return td;
560}
561
562static void put_job(struct thread_data *td)
563{
564	if (td == &def_thread)
565		return;
566
567	if (td->error)
568		fprintf(f_out, "fio: %s\n", td->verror);
569
570	memset(&threads[td->thread_number - 1], 0, sizeof(*td));
571	thread_number--;
572}
573
574/*
575 * Lazy way of fixing up options that depend on each other. We could also
576 * define option callback handlers, but this is easier.
577 */
578static void fixup_options(struct thread_data *td)
579{
580	if (!td->rwmixread && td->rwmixwrite)
581		td->rwmixread = 100 - td->rwmixwrite;
582
583	if (td->write_iolog_file && td->read_iolog_file) {
584		log_err("fio: read iolog overrides write_iolog\n");
585		free(td->write_iolog_file);
586		td->write_iolog_file = NULL;
587	}
588
589	if (td->io_ops->flags & FIO_SYNCIO)
590		td->iodepth = 1;
591	else {
592		if (!td->iodepth)
593			td->iodepth = td->nr_files;
594	}
595
596	/*
597	 * only really works for sequential io for now, and with 1 file
598	 */
599	if (td->zone_size && !td->sequential && td->nr_files == 1)
600		td->zone_size = 0;
601
602	/*
603	 * Reads can do overwrites, we always need to pre-create the file
604	 */
605	if (td_read(td) || td_rw(td))
606		td->overwrite = 1;
607
608	if (!td->min_bs[DDIR_READ])
609		td->min_bs[DDIR_READ]= td->bs[DDIR_READ];
610	if (!td->max_bs[DDIR_READ])
611		td->max_bs[DDIR_READ] = td->bs[DDIR_READ];
612	if (!td->min_bs[DDIR_WRITE])
613		td->min_bs[DDIR_WRITE]= td->bs[DDIR_WRITE];
614	if (!td->max_bs[DDIR_WRITE])
615		td->max_bs[DDIR_WRITE] = td->bs[DDIR_WRITE];
616
617	td->rw_min_bs = min(td->min_bs[DDIR_READ], td->min_bs[DDIR_WRITE]);
618
619	if (td_read(td) && !td_rw(td))
620		td->verify = 0;
621
622	if (td->norandommap && td->verify != VERIFY_NONE) {
623		log_err("fio: norandommap given, verify disabled\n");
624		td->verify = VERIFY_NONE;
625	}
626	if (td->bs_unaligned && (td->odirect || td->io_ops->flags & FIO_RAWIO))
627		log_err("fio: bs_unaligned may not work with raw io\n");
628
629	/*
630	 * O_DIRECT and char doesn't mix, clear that flag if necessary.
631	 */
632	if (td->filetype == FIO_TYPE_CHAR && td->odirect)
633		td->odirect = 0;
634}
635
636/*
637 * This function leaks the buffer
638 */
639static char *to_kmg(unsigned int val)
640{
641	char *buf = malloc(32);
642	char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
643	char *p = post;
644
645	do {
646		if (val & 1023)
647			break;
648
649		val >>= 10;
650		p++;
651	} while (*p);
652
653	snprintf(buf, 31, "%u%c", val, *p);
654	return buf;
655}
656
657/*
658 * Adds a job to the list of things todo. Sanitizes the various options
659 * to make sure we don't have conflicts, and initializes various
660 * members of td.
661 */
662static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
663{
664	const char *ddir_str[] = { "read", "write", "randread", "randwrite",
665				   "rw", NULL, "randrw" };
666	struct stat sb;
667	int numjobs, ddir, i;
668	struct fio_file *f;
669
670	/*
671	 * the def_thread is just for options, it's not a real job
672	 */
673	if (td == &def_thread)
674		return 0;
675
676	assert(td->io_ops);
677
678	if (td->odirect)
679		td->io_ops->flags |= FIO_RAWIO;
680
681	td->filetype = FIO_TYPE_FILE;
682	if (!stat(jobname, &sb)) {
683		if (S_ISBLK(sb.st_mode))
684			td->filetype = FIO_TYPE_BD;
685		else if (S_ISCHR(sb.st_mode))
686			td->filetype = FIO_TYPE_CHAR;
687	}
688
689	fixup_options(td);
690
691	if (td->filename)
692		td->nr_uniq_files = 1;
693	else
694		td->nr_uniq_files = td->nr_files;
695
696	if (td->filetype == FIO_TYPE_FILE || td->filename) {
697		char tmp[PATH_MAX];
698		int len = 0;
699
700		if (td->directory && td->directory[0] != '\0') {
701			if (lstat(td->directory, &sb) < 0) {
702				log_err("fio: %s is not a directory\n", td->directory);
703				td_verror(td, errno);
704				return 1;
705			}
706			if (!S_ISDIR(sb.st_mode)) {
707				log_err("fio: %s is not a directory\n", td->directory);
708				return 1;
709			}
710			len = sprintf(tmp, "%s/", td->directory);
711		}
712
713		td->files = malloc(sizeof(struct fio_file) * td->nr_files);
714
715		for_each_file(td, f, i) {
716			memset(f, 0, sizeof(*f));
717			f->fd = -1;
718
719			if (td->filename)
720				sprintf(tmp + len, "%s", td->filename);
721			else
722				sprintf(tmp + len, "%s.%d.%d", jobname, td->thread_number, i);
723			f->file_name = strdup(tmp);
724		}
725	} else {
726		td->nr_files = 1;
727		td->files = malloc(sizeof(struct fio_file));
728		f = &td->files[0];
729
730		memset(f, 0, sizeof(*f));
731		f->fd = -1;
732		f->file_name = strdup(jobname);
733	}
734
735	for_each_file(td, f, i) {
736		f->file_size = td->total_file_size / td->nr_files;
737		f->file_offset = td->start_offset;
738	}
739
740	fio_sem_init(&td->mutex, 0);
741
742	td->clat_stat[0].min_val = td->clat_stat[1].min_val = ULONG_MAX;
743	td->slat_stat[0].min_val = td->slat_stat[1].min_val = ULONG_MAX;
744	td->bw_stat[0].min_val = td->bw_stat[1].min_val = ULONG_MAX;
745
746	if (td->stonewall && td->thread_number > 1)
747		groupid++;
748
749	td->groupid = groupid;
750
751	if (setup_rate(td))
752		goto err;
753
754	if (td->write_lat_log) {
755		setup_log(&td->slat_log);
756		setup_log(&td->clat_log);
757	}
758	if (td->write_bw_log)
759		setup_log(&td->bw_log);
760
761	if (!td->name)
762		td->name = strdup(jobname);
763
764	ddir = td->ddir + (!td->sequential << 1) + (td->iomix << 2);
765
766	if (!terse_output) {
767		if (!job_add_num) {
768			if (td->io_ops->flags & FIO_CPUIO)
769				fprintf(f_out, "%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->name, td->cpuload, td->cpucycle);
770			else {
771				char *c1, *c2, *c3, *c4;
772
773				c1 = to_kmg(td->min_bs[DDIR_READ]);
774				c2 = to_kmg(td->max_bs[DDIR_READ]);
775				c3 = to_kmg(td->min_bs[DDIR_WRITE]);
776				c4 = to_kmg(td->max_bs[DDIR_WRITE]);
777
778				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);
779
780				free(c1);
781				free(c2);
782				free(c3);
783				free(c4);
784			}
785		} else if (job_add_num == 1)
786			fprintf(f_out, "...\n");
787	}
788
789	/*
790	 * recurse add identical jobs, clear numjobs and stonewall options
791	 * as they don't apply to sub-jobs
792	 */
793	numjobs = td->numjobs;
794	while (--numjobs) {
795		struct thread_data *td_new = get_new_job(0, td);
796
797		if (!td_new)
798			goto err;
799
800		td_new->numjobs = 1;
801		td_new->stonewall = 0;
802		job_add_num = numjobs - 1;
803
804		if (add_job(td_new, jobname, job_add_num))
805			goto err;
806	}
807	return 0;
808err:
809	put_job(td);
810	return -1;
811}
812
813/*
814 * Initialize the various random states we need (random io, block size ranges,
815 * read/write mix, etc).
816 */
817int init_random_state(struct thread_data *td)
818{
819	unsigned long seeds[4];
820	int fd, num_maps, blocks, i;
821	struct fio_file *f;
822
823	if (td->io_ops->flags & FIO_CPUIO)
824		return 0;
825
826	fd = open("/dev/urandom", O_RDONLY);
827	if (fd == -1) {
828		td_verror(td, errno);
829		return 1;
830	}
831
832	if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
833		td_verror(td, EIO);
834		close(fd);
835		return 1;
836	}
837
838	close(fd);
839
840	os_random_seed(seeds[0], &td->bsrange_state);
841	os_random_seed(seeds[1], &td->verify_state);
842	os_random_seed(seeds[2], &td->rwmix_state);
843
844	if (td->sequential)
845		return 0;
846
847	if (td->rand_repeatable)
848		seeds[3] = FIO_RANDSEED;
849
850	if (!td->norandommap) {
851		for_each_file(td, f, i) {
852			blocks = (f->real_file_size + td->rw_min_bs - 1) / td->rw_min_bs;
853			num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
854			f->file_map = malloc(num_maps * sizeof(long));
855			f->num_maps = num_maps;
856			memset(f->file_map, 0, num_maps * sizeof(long));
857		}
858	}
859
860	os_random_seed(seeds[3], &td->random_state);
861	return 0;
862}
863
864static void fill_cpu_mask(os_cpu_mask_t cpumask, int cpu)
865{
866#ifdef FIO_HAVE_CPU_AFFINITY
867	unsigned int i;
868
869	CPU_ZERO(&cpumask);
870
871	for (i = 0; i < sizeof(int) * 8; i++) {
872		if ((1 << i) & cpu)
873			CPU_SET(i, &cpumask);
874	}
875#endif
876}
877
878static int is_empty_or_comment(char *line)
879{
880	unsigned int i;
881
882	for (i = 0; i < strlen(line); i++) {
883		if (line[i] == ';')
884			return 1;
885		if (!isspace(line[i]) && !iscntrl(line[i]))
886			return 0;
887	}
888
889	return 1;
890}
891
892static int str_rw_cb(void *data, const char *mem)
893{
894	struct thread_data *td = data;
895
896	if (!strncmp(mem, "read", 4) || !strncmp(mem, "0", 1)) {
897		td->ddir = DDIR_READ;
898		td->sequential = 1;
899		return 0;
900	} else if (!strncmp(mem, "randread", 8)) {
901		td->ddir = DDIR_READ;
902		td->sequential = 0;
903		return 0;
904	} else if (!strncmp(mem, "write", 5) || !strncmp(mem, "1", 1)) {
905		td->ddir = DDIR_WRITE;
906		td->sequential = 1;
907		return 0;
908	} else if (!strncmp(mem, "randwrite", 9)) {
909		td->ddir = DDIR_WRITE;
910		td->sequential = 0;
911		return 0;
912	} else if (!strncmp(mem, "rw", 2)) {
913		td->ddir = DDIR_READ;
914		td->iomix = 1;
915		td->sequential = 1;
916		return 0;
917	} else if (!strncmp(mem, "randrw", 6)) {
918		td->ddir = DDIR_READ;
919		td->iomix = 1;
920		td->sequential = 0;
921		return 0;
922	}
923
924	log_err("fio: data direction: read, write, randread, randwrite, rw, randrw\n");
925	return 1;
926}
927
928static int str_verify_cb(void *data, const char *mem)
929{
930	struct thread_data *td = data;
931
932	if (!strncmp(mem, "0", 1)) {
933		td->verify = VERIFY_NONE;
934		return 0;
935	} else if (!strncmp(mem, "md5", 3) || !strncmp(mem, "1", 1)) {
936		td->verify = VERIFY_MD5;
937		return 0;
938	} else if (!strncmp(mem, "crc32", 5)) {
939		td->verify = VERIFY_CRC32;
940		return 0;
941	}
942
943	log_err("fio: verify types: md5, crc32\n");
944	return 1;
945}
946
947/*
948 * Check if mmap/mmaphuge has a :/foo/bar/file at the end. If so, return that.
949 */
950static char *get_mmap_file(const char *str)
951{
952	char *p = strstr(str, ":");
953
954	if (!p)
955		return NULL;
956
957	p++;
958	strip_blank_front(&p);
959	strip_blank_end(p);
960	return strdup(p);
961}
962
963static int str_mem_cb(void *data, const char *mem)
964{
965	struct thread_data *td = data;
966
967	if (!strncmp(mem, "malloc", 6)) {
968		td->mem_type = MEM_MALLOC;
969		return 0;
970	} else if (!strncmp(mem, "mmaphuge", 8)) {
971#ifdef FIO_HAVE_HUGETLB
972		/*
973		 * mmaphuge must be appended with the actual file
974		 */
975		td->mmapfile = get_mmap_file(mem);
976		if (!td->mmapfile) {
977			log_err("fio: mmaphuge:/path/to/file\n");
978			return 1;
979		}
980
981		td->mem_type = MEM_MMAPHUGE;
982		return 0;
983#else
984		log_err("fio: mmaphuge not available\n");
985		return 1;
986#endif
987	} else if (!strncmp(mem, "mmap", 4)) {
988		/*
989		 * Check if the user wants file backed memory. It's ok
990		 * if there's no file given, we'll just use anon mamp then.
991		 */
992		td->mmapfile = get_mmap_file(mem);
993		td->mem_type = MEM_MMAP;
994		return 0;
995	} else if (!strncmp(mem, "shmhuge", 7)) {
996#ifdef FIO_HAVE_HUGETLB
997		td->mem_type = MEM_SHMHUGE;
998		return 0;
999#else
1000		log_err("fio: shmhuge not available\n");
1001		return 1;
1002#endif
1003	} else if (!strncmp(mem, "shm", 3)) {
1004		td->mem_type = MEM_SHM;
1005		return 0;
1006	}
1007
1008	log_err("fio: mem type: malloc, shm, shmhuge, mmap, mmaphuge\n");
1009	return 1;
1010}
1011
1012static int str_ioengine_cb(void *data, const char *str)
1013{
1014	struct thread_data *td = data;
1015
1016	td->io_ops = load_ioengine(td, str);
1017	if (td->io_ops)
1018		return 0;
1019
1020	log_err("fio: ioengine= libaio, posixaio, sync, mmap, sgio, splice, cpu, null\n");
1021	log_err("fio: or specify path to dynamic ioengine module\n");
1022	return 1;
1023}
1024
1025static int str_lockmem_cb(void fio_unused *data, unsigned long *val)
1026{
1027	mlock_size = *val;
1028	return 0;
1029}
1030
1031#ifdef FIO_HAVE_IOPRIO
1032static int str_prioclass_cb(void *data, unsigned int *val)
1033{
1034	struct thread_data *td = data;
1035
1036	td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
1037	return 0;
1038}
1039
1040static int str_prio_cb(void *data, unsigned int *val)
1041{
1042	struct thread_data *td = data;
1043
1044	td->ioprio |= *val;
1045	return 0;
1046}
1047#endif
1048
1049static int str_exitall_cb(void)
1050{
1051	exitall_on_terminate = 1;
1052	return 0;
1053}
1054
1055static int str_cpumask_cb(void *data, unsigned int *val)
1056{
1057	struct thread_data *td = data;
1058
1059	fill_cpu_mask(td->cpumask, *val);
1060	return 0;
1061}
1062
1063/*
1064 * This is our [ini] type file parser.
1065 */
1066static int parse_jobs_ini(char *file, int stonewall_flag)
1067{
1068	unsigned int global;
1069	struct thread_data *td;
1070	char *string, *name;
1071	fpos_t off;
1072	FILE *f;
1073	char *p;
1074	int ret = 0, stonewall;
1075
1076	f = fopen(file, "r");
1077	if (!f) {
1078		perror("fopen job file");
1079		return 1;
1080	}
1081
1082	string = malloc(4096);
1083	name = malloc(256);
1084	memset(name, 0, 256);
1085
1086	stonewall = stonewall_flag;
1087	do {
1088		p = fgets(string, 4095, f);
1089		if (!p)
1090			break;
1091		if (is_empty_or_comment(p))
1092			continue;
1093		if (sscanf(p, "[%255s]", name) != 1)
1094			continue;
1095
1096		global = !strncmp(name, "global", 6);
1097
1098		name[strlen(name) - 1] = '\0';
1099
1100		td = get_new_job(global, &def_thread);
1101		if (!td) {
1102			ret = 1;
1103			break;
1104		}
1105
1106		/*
1107		 * Seperate multiple job files by a stonewall
1108		 */
1109		if (!global && stonewall) {
1110			td->stonewall = stonewall;
1111			stonewall = 0;
1112		}
1113
1114		fgetpos(f, &off);
1115		while ((p = fgets(string, 4096, f)) != NULL) {
1116			if (is_empty_or_comment(p))
1117				continue;
1118
1119			strip_blank_front(&p);
1120
1121			if (p[0] == '[')
1122				break;
1123
1124			strip_blank_end(p);
1125
1126			fgetpos(f, &off);
1127
1128			/*
1129			 * Don't break here, continue parsing options so we
1130			 * dump all the bad ones. Makes trial/error fixups
1131			 * easier on the user.
1132			 */
1133			ret |= parse_option(p, options, td);
1134		}
1135
1136		if (!ret) {
1137			fsetpos(f, &off);
1138			ret = add_job(td, name, 0);
1139		} else {
1140			log_err("fio: job %s dropped\n", name);
1141			put_job(td);
1142		}
1143	} while (!ret);
1144
1145	free(string);
1146	free(name);
1147	fclose(f);
1148	return ret;
1149}
1150
1151static int fill_def_thread(void)
1152{
1153	memset(&def_thread, 0, sizeof(def_thread));
1154
1155	if (fio_getaffinity(getpid(), &def_thread.cpumask) == -1) {
1156		perror("sched_getaffinity");
1157		return 1;
1158	}
1159
1160	/*
1161	 * fill default options
1162	 */
1163	fill_default_options(&def_thread, options);
1164
1165	def_thread.timeout = def_timeout;
1166	def_thread.write_bw_log = write_bw_log;
1167	def_thread.write_lat_log = write_lat_log;
1168
1169#ifdef FIO_HAVE_DISK_UTIL
1170	def_thread.do_disk_util = 1;
1171#endif
1172
1173	return 0;
1174}
1175
1176static void usage(void)
1177{
1178	printf("%s\n", fio_version_string);
1179	printf("\t--output\tWrite output to file\n");
1180	printf("\t--timeout\tRuntime in seconds\n");
1181	printf("\t--latency-log\tGenerate per-job latency logs\n");
1182	printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
1183	printf("\t--minimal\tMinimal (terse) output\n");
1184	printf("\t--version\tPrint version info and exit\n");
1185	printf("\t--help\t\tPrint this page\n");
1186	printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of them\n");
1187}
1188
1189static int parse_cmd_line(int argc, char *argv[])
1190{
1191	struct thread_data *td = NULL;
1192	int c, ini_idx = 0, lidx, ret;
1193
1194	while ((c = getopt_long(argc, argv, "", long_options, &lidx)) != -1) {
1195		switch (c) {
1196		case 't':
1197			def_timeout = atoi(optarg);
1198			break;
1199		case 'l':
1200			write_lat_log = 1;
1201			break;
1202		case 'w':
1203			write_bw_log = 1;
1204			break;
1205		case 'o':
1206			f_out = fopen(optarg, "w+");
1207			if (!f_out) {
1208				perror("fopen output");
1209				exit(1);
1210			}
1211			f_err = f_out;
1212			break;
1213		case 'm':
1214			terse_output = 1;
1215			break;
1216		case 'h':
1217			usage();
1218			exit(0);
1219		case 'c':
1220			ret = show_cmd_help(options, optarg);
1221			exit(ret);
1222		case 'v':
1223			printf("%s\n", fio_version_string);
1224			exit(0);
1225		case FIO_GETOPT_JOB: {
1226			const char *opt = long_options[lidx].name;
1227			char *val = optarg;
1228
1229			if (!strncmp(opt, "name", 4) && td) {
1230				ret = add_job(td, td->name ?: "fio", 0);
1231				if (ret) {
1232					put_job(td);
1233					return 0;
1234				}
1235				td = NULL;
1236			}
1237			if (!td) {
1238				int global = !strncmp(val, "global", 6);
1239
1240				td = get_new_job(global, &def_thread);
1241				if (!td)
1242					return 0;
1243			}
1244
1245			ret = parse_cmd_option(opt, val, options, td);
1246			if (ret) {
1247				log_err("fio: job dropped\n");
1248				put_job(td);
1249				td = NULL;
1250			}
1251			break;
1252		}
1253		default:
1254			break;
1255		}
1256	}
1257
1258	if (td) {
1259		ret = add_job(td, td->name ?: "fio", 0);
1260		if (ret)
1261			put_job(td);
1262	}
1263
1264	while (optind < argc) {
1265		ini_idx++;
1266		ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1267		ini_file[ini_idx - 1] = strdup(argv[optind]);
1268		optind++;
1269	}
1270
1271	return ini_idx;
1272}
1273
1274static void free_shm(void)
1275{
1276	struct shmid_ds sbuf;
1277
1278	if (threads) {
1279		shmdt((void *) threads);
1280		threads = NULL;
1281		shmctl(shm_id, IPC_RMID, &sbuf);
1282	}
1283}
1284
1285/*
1286 * The thread area is shared between the main process and the job
1287 * threads/processes. So setup a shared memory segment that will hold
1288 * all the job info.
1289 */
1290static int setup_thread_area(void)
1291{
1292	/*
1293	 * 1024 is too much on some machines, scale max_jobs if
1294	 * we get a failure that looks like too large a shm segment
1295	 */
1296	do {
1297		size_t size = max_jobs * sizeof(struct thread_data);
1298
1299		shm_id = shmget(0, size, IPC_CREAT | 0600);
1300		if (shm_id != -1)
1301			break;
1302		if (errno != EINVAL) {
1303			perror("shmget");
1304			break;
1305		}
1306
1307		max_jobs >>= 1;
1308	} while (max_jobs);
1309
1310	if (shm_id == -1)
1311		return 1;
1312
1313	threads = shmat(shm_id, NULL, 0);
1314	if (threads == (void *) -1) {
1315		perror("shmat");
1316		return 1;
1317	}
1318
1319	atexit(free_shm);
1320	return 0;
1321}
1322
1323/*
1324 * Copy the fio options into the long options map, so we mirror
1325 * job and cmd line options.
1326 */
1327static void dupe_job_options(void)
1328{
1329	struct fio_option *o;
1330	unsigned int i;
1331
1332	i = 0;
1333	while (long_options[i].name)
1334		i++;
1335
1336	o = &options[0];
1337	while (o->name) {
1338		long_options[i].name = o->name;
1339		long_options[i].val = FIO_GETOPT_JOB;
1340		if (o->type == FIO_OPT_STR_SET)
1341			long_options[i].has_arg = no_argument;
1342		else
1343			long_options[i].has_arg = required_argument;
1344
1345		i++;
1346		o++;
1347		assert(i < FIO_JOB_OPTS + FIO_CMD_OPTS);
1348	}
1349}
1350
1351int parse_options(int argc, char *argv[])
1352{
1353	int job_files, i;
1354
1355	f_out = stdout;
1356	f_err = stderr;
1357
1358	options_init(options);
1359
1360	dupe_job_options();
1361
1362	if (setup_thread_area())
1363		return 1;
1364	if (fill_def_thread())
1365		return 1;
1366
1367	job_files = parse_cmd_line(argc, argv);
1368
1369	for (i = 0; i < job_files; i++) {
1370		if (fill_def_thread())
1371			return 1;
1372		if (parse_jobs_ini(ini_file[i], i))
1373			return 1;
1374		free(ini_file[i]);
1375	}
1376
1377	free(ini_file);
1378
1379	if (!thread_number) {
1380		log_err("No jobs defined(s)\n");
1381		return 1;
1382	}
1383
1384	return 0;
1385}
1386