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1#ifndef FIO_H
2#define FIO_H
3
4#include <sched.h>
5#include <limits.h>
6#include <pthread.h>
7#include <sys/time.h>
8#include <sys/resource.h>
9#include <errno.h>
10#include <stdlib.h>
11#include <stdio.h>
12#include <unistd.h>
13#include <string.h>
14#include <getopt.h>
15
16#include "list.h"
17#include "rbtree.h"
18#include "md5.h"
19#include "crc32.h"
20#include "arch.h"
21#include "os.h"
22#include "mutex.h"
23
24#ifdef FIO_HAVE_SYSLET
25#include "syslet.h"
26#endif
27
28#ifdef FIO_HAVE_GUASI
29#include <guasi.h>
30#endif
31
32enum fio_ddir {
33 DDIR_READ = 0,
34 DDIR_WRITE,
35 DDIR_SYNC,
36};
37
38enum td_ddir {
39 TD_DDIR_READ = 1 << 0,
40 TD_DDIR_WRITE = 1 << 1,
41 TD_DDIR_RAND = 1 << 2,
42 TD_DDIR_RW = TD_DDIR_READ | TD_DDIR_WRITE,
43 TD_DDIR_RANDREAD = TD_DDIR_READ | TD_DDIR_RAND,
44 TD_DDIR_RANDWRITE = TD_DDIR_WRITE | TD_DDIR_RAND,
45 TD_DDIR_RANDRW = TD_DDIR_RW | TD_DDIR_RAND,
46};
47
48/*
49 * Use for maintaining statistics
50 */
51struct io_stat {
52 unsigned long max_val;
53 unsigned long min_val;
54 unsigned long samples;
55
56 double mean;
57 double S;
58};
59
60/*
61 * A single data sample
62 */
63struct io_sample {
64 unsigned long time;
65 unsigned long val;
66 enum fio_ddir ddir;
67};
68
69/*
70 * Dynamically growing data sample log
71 */
72struct io_log {
73 unsigned long nr_samples;
74 unsigned long max_samples;
75 struct io_sample *log;
76};
77
78/*
79 * When logging io actions, this matches a single sent io_u
80 */
81struct io_piece {
82 union {
83 struct rb_node rb_node;
84 struct list_head list;
85 };
86 struct fio_file *file;
87 unsigned long long offset;
88 unsigned long len;
89 enum fio_ddir ddir;
90};
91
92#ifdef FIO_HAVE_SYSLET
93struct syslet_req {
94 struct syslet_uatom atom; /* the atom to submit */
95 struct syslet_uatom *head; /* head of the sequence */
96 long ret; /* syscall return value */
97};
98#endif
99
100enum {
101 IO_U_F_FREE = 1 << 0,
102 IO_U_F_FLIGHT = 1 << 1,
103};
104
105struct thread_data;
106
107/*
108 * The io unit
109 */
110struct io_u {
111 union {
112#ifdef FIO_HAVE_LIBAIO
113 struct iocb iocb;
114#endif
115#ifdef FIO_HAVE_POSIXAIO
116 struct aiocb aiocb;
117#endif
118#ifdef FIO_HAVE_SGIO
119 struct sg_io_hdr hdr;
120#endif
121#ifdef FIO_HAVE_SYSLET
122 struct syslet_req req;
123#endif
124#ifdef FIO_HAVE_GUASI
125 guasi_req_t greq;
126#endif
127 };
128 struct timeval start_time;
129 struct timeval issue_time;
130
131 /*
132 * Allocated/set buffer and length
133 */
134 void *buf;
135 unsigned long buflen;
136 unsigned long long offset;
137
138 /*
139 * IO engine state, may be different from above when we get
140 * partial transfers / residual data counts
141 */
142 void *xfer_buf;
143 unsigned long xfer_buflen;
144
145 unsigned int resid;
146 unsigned int error;
147
148 enum fio_ddir ddir;
149
150 /*
151 * io engine private data
152 */
153 union {
154 unsigned int index;
155 unsigned int seen;
156 };
157
158 unsigned int flags;
159
160 struct fio_file *file;
161
162 struct list_head list;
163
164 /*
165 * Callback for io completion
166 */
167 int (*end_io)(struct thread_data *, struct io_u *);
168};
169
170/*
171 * io_ops->queue() return values
172 */
173enum {
174 FIO_Q_COMPLETED = 0, /* completed sync */
175 FIO_Q_QUEUED = 1, /* queued, will complete async */
176 FIO_Q_BUSY = 2, /* no more room, call ->commit() */
177};
178
179#define FIO_HDR_MAGIC 0xf00baaef
180
181enum {
182 VERIFY_NONE = 0, /* no verification */
183 VERIFY_MD5, /* md5 sum data blocks */
184 VERIFY_CRC32, /* crc32 sum data blocks */
185 VERIFY_NULL, /* pretend to verify */
186};
187
188/*
189 * A header structure associated with each checksummed data block
190 */
191struct verify_header {
192 unsigned int fio_magic;
193 unsigned int len;
194 unsigned int verify_type;
195 union {
196 char md5_digest[MD5_HASH_WORDS * 4];
197 unsigned long crc32;
198 };
199};
200
201struct group_run_stats {
202 unsigned long long max_run[2], min_run[2];
203 unsigned long long max_bw[2], min_bw[2];
204 unsigned long long io_kb[2];
205 unsigned long long agg[2];
206};
207
208/*
209 * What type of allocation to use for io buffers
210 */
211enum fio_memtype {
212 MEM_MALLOC = 0, /* ordinary malloc */
213 MEM_SHM, /* use shared memory segments */
214 MEM_SHMHUGE, /* use shared memory segments with huge pages */
215 MEM_MMAP, /* use anonynomous mmap */
216 MEM_MMAPHUGE, /* memory mapped huge file */
217};
218
219/*
220 * The type of object we are working on
221 */
222enum fio_filetype {
223 FIO_TYPE_FILE = 1, /* plain file */
224 FIO_TYPE_BD, /* block device */
225 FIO_TYPE_CHAR, /* character device */
226};
227
228enum fio_ioengine_flags {
229 FIO_SYNCIO = 1 << 0, /* io engine has synchronous ->queue */
230 FIO_RAWIO = 1 << 1, /* some sort of direct/raw io */
231 FIO_DISKLESSIO = 1 << 2, /* no disk involved */
232 FIO_NOEXTEND = 1 << 3, /* engine can't extend file */
233 FIO_NODISKUTIL = 1 << 4, /* diskutil can't handle filename */
234};
235
236enum fio_file_flags {
237 FIO_FILE_OPEN = 1 << 0, /* file is open */
238 FIO_FILE_UNLINK = 1 << 1, /* unlink on close */
239 FIO_FILE_CLOSING = 1 << 2, /* file being closed */
240 FIO_FILE_EXISTS = 1 << 3, /* file there */
241 FIO_FILE_EXTEND = 1 << 4, /* needs extend */
242 FIO_FILE_NOSORT = 1 << 5, /* don't sort verify blocks */
243};
244
245/*
246 * Each thread_data structure has a number of files associated with it,
247 * this structure holds state information for a single file.
248 */
249struct fio_file {
250 enum fio_filetype filetype;
251
252 /*
253 * A file may not be a file descriptor, let the io engine decide
254 */
255 union {
256 unsigned long file_data;
257 int fd;
258 };
259
260 /*
261 * filename and possible memory mapping
262 */
263 char *file_name;
264 void *mmap;
265
266 /*
267 * size of the file, offset into file, and io size from that offset
268 */
269 unsigned long long real_file_size;
270 unsigned long long file_offset;
271 unsigned long long io_size;
272
273 unsigned long long last_pos;
274 unsigned long long last_completed_pos;
275
276 /*
277 * block map for random io
278 */
279 unsigned long *file_map;
280 unsigned int num_maps;
281 unsigned int last_free_lookup;
282
283 int references;
284 enum fio_file_flags flags;
285};
286
287/*
288 * How many depth levels to log
289 */
290#define FIO_IO_U_MAP_NR 8
291#define FIO_IO_U_LAT_NR 12
292
293struct thread_stat {
294 char *name;
295 char *verror;
296 int error;
297 int groupid;
298 pid_t pid;
299 char *description;
300 int members;
301
302 struct io_log *slat_log;
303 struct io_log *clat_log;
304 struct io_log *bw_log;
305
306 /*
307 * bandwidth and latency stats
308 */
309 struct io_stat clat_stat[2]; /* completion latency */
310 struct io_stat slat_stat[2]; /* submission latency */
311 struct io_stat bw_stat[2]; /* bandwidth stats */
312
313 unsigned long long stat_io_bytes[2];
314 struct timeval stat_sample_time[2];
315
316 /*
317 * fio system usage accounting
318 */
319 struct rusage ru_start;
320 struct rusage ru_end;
321 unsigned long usr_time;
322 unsigned long sys_time;
323 unsigned long ctx;
324
325 /*
326 * IO depth and latency stats
327 */
328 unsigned int io_u_map[FIO_IO_U_MAP_NR];
329 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
330 unsigned long total_io_u[2];
331
332 unsigned long long io_bytes[2];
333 unsigned long runtime[2];
334 unsigned long total_run_time;
335};
336
337struct thread_options {
338 int pad;
339 char *description;
340 char *name;
341 char *directory;
342 char *filename;
343 char *opendir;
344 char *ioengine;
345 enum td_ddir td_ddir;
346 unsigned int ddir_nr;
347 unsigned int iodepth;
348 unsigned int iodepth_low;
349 unsigned int iodepth_batch;
350
351 unsigned long long size;
352 unsigned long long file_size_low;
353 unsigned long long file_size_high;
354 unsigned long long start_offset;
355
356 unsigned int bs[2];
357 unsigned int min_bs[2];
358 unsigned int max_bs[2];
359
360 unsigned int nr_files;
361 unsigned int open_files;
362
363 unsigned int odirect;
364 unsigned int invalidate_cache;
365 unsigned int create_serialize;
366 unsigned int create_fsync;
367 unsigned int end_fsync;
368 unsigned int sync_io;
369 unsigned int verify;
370 unsigned int verifysort;
371 unsigned int use_thread;
372 unsigned int unlink;
373 unsigned int do_disk_util;
374 unsigned int override_sync;
375 unsigned int rand_repeatable;
376 unsigned int write_lat_log;
377 unsigned int write_bw_log;
378 unsigned int norandommap;
379 unsigned int bs_unaligned;
380 unsigned int fsync_on_close;
381
382 unsigned int hugepage_size;
383 unsigned int rw_min_bs;
384 unsigned int thinktime;
385 unsigned int thinktime_spin;
386 unsigned int thinktime_blocks;
387 unsigned int fsync_blocks;
388 unsigned int start_delay;
389 unsigned long timeout;
390 unsigned int overwrite;
391 unsigned int bw_avg_time;
392 unsigned int loops;
393 unsigned long long zone_size;
394 unsigned long long zone_skip;
395 enum fio_memtype mem_type;
396
397 unsigned int stonewall;
398 unsigned int new_group;
399 unsigned int numjobs;
400 os_cpu_mask_t cpumask;
401 unsigned int iolog;
402 unsigned int read_iolog;
403 unsigned int rwmixcycle;
404 unsigned int rwmix[2];
405 unsigned int nice;
406 unsigned int file_service_type;
407 unsigned int group_reporting;
408 unsigned int fadvise_hint;
409
410 char *read_iolog_file;
411 char *write_iolog_file;
412
413 /*
414 * Pre-run and post-run shell
415 */
416 char *exec_prerun;
417 char *exec_postrun;
418
419 unsigned int rate;
420 unsigned int ratemin;
421 unsigned int ratecycle;
422 unsigned int rate_iops;
423 unsigned int rate_iops_min;
424
425 char *ioscheduler;
426
427 /*
428 * CPU "io" cycle burner
429 */
430 unsigned int cpuload;
431 unsigned int cpucycle;
432};
433
434#define FIO_VERROR_SIZE 128
435
436/*
437 * This describes a single thread/process executing a fio job.
438 */
439struct thread_data {
440 struct thread_options o;
441 char verror[FIO_VERROR_SIZE];
442 pthread_t thread;
443 int thread_number;
444 int groupid;
445 struct thread_stat ts;
446 struct fio_file *files;
447 unsigned int files_index;
448 unsigned int nr_open_files;
449 unsigned int nr_normal_files;
450 union {
451 unsigned int next_file;
452 os_random_state_t next_file_state;
453 };
454 int error;
455 pid_t pid;
456 char *orig_buffer;
457 size_t orig_buffer_size;
458 volatile int terminate;
459 volatile int runstate;
460 unsigned int ioprio;
461 unsigned int last_was_sync;
462
463 char *mmapfile;
464 int mmapfd;
465
466 void *iolog_buf;
467 FILE *iolog_f;
468
469 char *sysfs_root;
470
471 os_random_state_t bsrange_state;
472 os_random_state_t verify_state;
473
474 int shm_id;
475
476 /*
477 * IO engine hooks, contains everything needed to submit an io_u
478 * to any of the available IO engines.
479 */
480 struct ioengine_ops *io_ops;
481
482 /*
483 * Current IO depth and list of free and busy io_u's.
484 */
485 unsigned int cur_depth;
486 struct list_head io_u_freelist;
487 struct list_head io_u_busylist;
488 struct list_head io_u_requeues;
489 unsigned int io_u_queued;
490
491 /*
492 * Rate state
493 */
494 unsigned long rate_usec_cycle;
495 long rate_pending_usleep;
496 unsigned long rate_bytes;
497 unsigned long rate_blocks;
498 struct timeval lastrate;
499
500 unsigned long long total_io_size;
501
502 unsigned long io_issues[2];
503 unsigned long long io_blocks[2];
504 unsigned long long io_bytes[2];
505 unsigned long long this_io_bytes[2];
506 unsigned long long zone_bytes;
507 struct fio_sem *mutex;
508
509 /*
510 * State for random io, a bitmap of blocks done vs not done
511 */
512 os_random_state_t random_state;
513
514 struct timeval start; /* start of this loop */
515 struct timeval epoch; /* time job was started */
516 struct timeval rw_end[2];
517 unsigned int rw_end_set[2];
518
519 /*
520 * read/write mixed workload state
521 */
522 os_random_state_t rwmix_state;
523 unsigned long long rwmix_bytes;
524 struct timeval rwmix_switch;
525 enum fio_ddir rwmix_ddir;
526 unsigned int ddir_nr;
527
528 /*
529 * IO history logs for verification. We use a tree for sorting,
530 * if we are overwriting. Otherwise just use a fifo.
531 */
532 struct rb_root io_hist_tree;
533 struct list_head io_hist_list;
534
535 /*
536 * For IO replaying
537 */
538 struct list_head io_log_list;
539
540 /*
541 * timeout handling
542 */
543 struct timeval timeout_end;
544 struct itimerval timer;
545
546 /*
547 * for fileservice, how often to switch to a new file
548 */
549 unsigned int file_service_nr;
550 unsigned int file_service_left;
551 struct fio_file *file_service_file;
552
553 /*
554 * For generating file sizes
555 */
556 os_random_state_t file_size_state;
557};
558
559/*
560 * roundrobin available files, or choose one at random.
561 */
562enum {
563 FIO_FSERVICE_RANDOM = 1,
564 FIO_FSERVICE_RR = 2,
565};
566
567/*
568 * 30 second per-io_u timeout, with 5 second intervals to avoid resetting
569 * the timer on each queue operation.
570 */
571#define IO_U_TIMEOUT_INC 5
572#define IO_U_TIMEOUT 30
573
574#define __td_verror(td, err, msg, func) \
575 do { \
576 if ((td)->error) \
577 break; \
578 int e = (err); \
579 (td)->error = e; \
580 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
581 } while (0)
582
583
584#define td_verror(td, err, func) \
585 __td_verror((td), (err), strerror((err)), (func))
586#define td_vmsg(td, err, msg, func) \
587 __td_verror((td), (err), (msg), (func))
588
589extern int exitall_on_terminate;
590extern int thread_number;
591extern int nr_process, nr_thread;
592extern int shm_id;
593extern int groupid;
594extern int terse_output;
595extern FILE *f_out;
596extern FILE *f_err;
597extern int temp_stall_ts;
598extern unsigned long long mlock_size;
599extern unsigned long page_mask, page_size;
600
601extern struct thread_data *threads;
602
603#define td_read(td) ((td)->o.td_ddir & TD_DDIR_READ)
604#define td_write(td) ((td)->o.td_ddir & TD_DDIR_WRITE)
605#define td_rw(td) (((td)->o.td_ddir & TD_DDIR_RW) == TD_DDIR_RW)
606#define td_random(td) ((td)->o.td_ddir & TD_DDIR_RAND)
607
608#define BLOCKS_PER_MAP (8 * sizeof(long))
609#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->o.rw_min_bs))
610#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
611#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
612
613#define MAX_JOBS (1024)
614
615static inline int should_fsync(struct thread_data *td)
616{
617 if (td->last_was_sync)
618 return 0;
619 if (td->o.odirect)
620 return 0;
621 if (td_write(td) || td_rw(td) || td->o.override_sync)
622 return 1;
623
624 return 0;
625}
626
627/*
628 * Disk utils as read in /sys/block/<dev>/stat
629 */
630struct disk_util_stat {
631 unsigned ios[2];
632 unsigned merges[2];
633 unsigned long long sectors[2];
634 unsigned ticks[2];
635 unsigned io_ticks;
636 unsigned time_in_queue;
637};
638
639/*
640 * Per-device disk util management
641 */
642struct disk_util {
643 struct list_head list;
644
645 char *name;
646 char path[256];
647 dev_t dev;
648
649 struct disk_util_stat dus;
650 struct disk_util_stat last_dus;
651
652 unsigned long msec;
653 struct timeval time;
654};
655
656#define DISK_UTIL_MSEC (250)
657
658#ifndef min
659#define min(a, b) ((a) < (b) ? (a) : (b))
660#endif
661#ifndef max
662#define max(a, b) ((a) > (b) ? (a) : (b))
663#endif
664
665/*
666 * Log exports
667 */
668extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
669extern void write_iolog_put(struct thread_data *, struct io_u *);
670extern int __must_check init_iolog(struct thread_data *td);
671extern void log_io_piece(struct thread_data *, struct io_u *);
672extern void prune_io_piece_log(struct thread_data *);
673extern void write_iolog_close(struct thread_data *);
674
675/*
676 * Logging
677 */
678extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
679extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
680extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
681extern void show_run_stats(void);
682extern void init_disk_util(struct thread_data *);
683extern void update_rusage_stat(struct thread_data *);
684extern void update_io_ticks(void);
685extern void disk_util_timer_arm(void);
686extern void setup_log(struct io_log **);
687extern void finish_log(struct thread_data *, struct io_log *, const char *);
688extern void __finish_log(struct io_log *, const char *);
689extern struct io_log *agg_io_log[2];
690extern int write_bw_log;
691extern void add_agg_sample(unsigned long, enum fio_ddir);
692
693/*
694 * Time functions
695 */
696extern unsigned long utime_since(struct timeval *, struct timeval *);
697extern unsigned long utime_since_now(struct timeval *);
698extern unsigned long mtime_since(struct timeval *, struct timeval *);
699extern unsigned long mtime_since_now(struct timeval *);
700extern unsigned long time_since_now(struct timeval *);
701extern unsigned long mtime_since_genesis(void);
702extern void __usec_sleep(unsigned int);
703extern void usec_sleep(struct thread_data *, unsigned long);
704extern void rate_throttle(struct thread_data *, unsigned long, unsigned int);
705extern void fill_start_time(struct timeval *);
706extern void fio_gettime(struct timeval *, void *);
707extern void set_genesis_time(void);
708
709/*
710 * Init/option functions
711 */
712extern int __must_check parse_options(int, char **);
713extern int fio_option_parse(struct thread_data *, const char *);
714extern int fio_cmd_option_parse(struct thread_data *, const char *, char *);
715extern void fio_fill_default_options(struct thread_data *);
716extern int fio_show_option_help(const char *);
717extern void fio_options_dup_and_init(struct option *);
718extern void options_mem_dupe(struct thread_data *);
719extern void options_mem_free(struct thread_data *);
720#define FIO_GETOPT_JOB 0x89988998
721#define FIO_NR_OPTIONS 128
722
723/*
724 * File setup/shutdown
725 */
726extern void close_files(struct thread_data *);
727extern int __must_check setup_files(struct thread_data *);
728extern int __must_check open_files(struct thread_data *);
729extern int __must_check file_invalidate_cache(struct thread_data *, struct fio_file *);
730extern int __must_check generic_open_file(struct thread_data *, struct fio_file *);
731extern void generic_close_file(struct thread_data *, struct fio_file *);
732extern void add_file(struct thread_data *, const char *);
733extern void get_file(struct fio_file *);
734extern void put_file(struct thread_data *, struct fio_file *);
735extern int add_dir_files(struct thread_data *, const char *);
736extern int init_random_map(struct thread_data *);
737extern void dup_files(struct thread_data *, struct thread_data *);
738
739/*
740 * ETA/status stuff
741 */
742extern void print_thread_status(void);
743extern void print_status_init(int);
744
745/*
746 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
747 * will never back again. It may cycle between running/verififying/fsyncing.
748 * Once the thread reaches TD_EXITED, it is just waiting for the core to
749 * reap it.
750 */
751enum {
752 TD_NOT_CREATED = 0,
753 TD_CREATED,
754 TD_INITIALIZED,
755 TD_RUNNING,
756 TD_VERIFYING,
757 TD_FSYNCING,
758 TD_EXITED,
759 TD_REAPED,
760};
761
762/*
763 * Verify helpers
764 */
765extern void populate_verify_io_u(struct thread_data *, struct io_u *);
766extern int __must_check get_next_verify(struct thread_data *td, struct io_u *);
767extern int __must_check verify_io_u(struct thread_data *, struct io_u *);
768
769/*
770 * Memory helpers
771 */
772extern int __must_check fio_pin_memory(void);
773extern void fio_unpin_memory(void);
774extern int __must_check allocate_io_mem(struct thread_data *);
775extern void free_io_mem(struct thread_data *);
776
777/*
778 * io unit handling
779 */
780#define queue_full(td) list_empty(&(td)->io_u_freelist)
781extern struct io_u *__get_io_u(struct thread_data *);
782extern struct io_u *get_io_u(struct thread_data *);
783extern void put_io_u(struct thread_data *, struct io_u *);
784extern void requeue_io_u(struct thread_data *, struct io_u **);
785extern long __must_check io_u_sync_complete(struct thread_data *, struct io_u *);
786extern long __must_check io_u_queued_complete(struct thread_data *, int);
787extern void io_u_queued(struct thread_data *, struct io_u *);
788extern void io_u_log_error(struct thread_data *, struct io_u *);
789extern void io_u_init_timeout(void);
790extern void io_u_set_timeout(struct thread_data *);
791extern void io_u_mark_depth(struct thread_data *, struct io_u *);
792
793/*
794 * io engine entry points
795 */
796extern int __must_check td_io_init(struct thread_data *);
797extern int __must_check td_io_prep(struct thread_data *, struct io_u *);
798extern int __must_check td_io_queue(struct thread_data *, struct io_u *);
799extern int __must_check td_io_sync(struct thread_data *, struct fio_file *);
800extern int __must_check td_io_getevents(struct thread_data *, int, int, struct timespec *);
801extern int __must_check td_io_commit(struct thread_data *);
802extern int __must_check td_io_open_file(struct thread_data *, struct fio_file *);
803extern void td_io_close_file(struct thread_data *, struct fio_file *);
804
805/*
806 * If logging output to a file, stderr should go to both stderr and f_err
807 */
808#define log_err(args...) do { \
809 fprintf(f_err, ##args); \
810 if (f_err != stderr) \
811 fprintf(stderr, ##args); \
812 } while (0)
813
814#define log_info(args...) fprintf(f_out, ##args)
815
816FILE *get_f_out(void);
817FILE *get_f_err(void);
818
819struct ioengine_ops {
820 struct list_head list;
821 char name[16];
822 int version;
823 int flags;
824 int (*setup)(struct thread_data *);
825 int (*init)(struct thread_data *);
826 int (*prep)(struct thread_data *, struct io_u *);
827 int (*queue)(struct thread_data *, struct io_u *);
828 int (*commit)(struct thread_data *);
829 int (*getevents)(struct thread_data *, int, int, struct timespec *);
830 struct io_u *(*event)(struct thread_data *, int);
831 int (*cancel)(struct thread_data *, struct io_u *);
832 void (*cleanup)(struct thread_data *);
833 int (*open_file)(struct thread_data *, struct fio_file *);
834 void (*close_file)(struct thread_data *, struct fio_file *);
835 void *data;
836 void *dlhandle;
837};
838
839#define FIO_IOOPS_VERSION 7
840
841extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
842extern void register_ioengine(struct ioengine_ops *);
843extern void unregister_ioengine(struct ioengine_ops *);
844extern void close_ioengine(struct thread_data *);
845
846/*
847 * Mark unused variables passed to ops functions as unused, to silence gcc
848 */
849#define fio_unused __attribute((__unused__))
850#define fio_init __attribute__((constructor))
851#define fio_exit __attribute__((destructor))
852
853#define for_each_td(td, i) \
854 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
855#define for_each_file(td, f, i) \
856 for ((i) = 0, (f) = &(td)->files[0]; (i) < (td)->o.nr_files; (i)++, (f)++)
857
858#define fio_assert(td, cond) do { \
859 if (!(cond)) { \
860 int *__foo = NULL; \
861 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
862 (td)->runstate = TD_EXITED; \
863 (td)->error = EFAULT; \
864 *__foo = 0; \
865 } \
866} while (0)
867
868#endif
fio - Flexible IO Tester