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Remove redundant double casts in time functions
[fio.git] / fio.h
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CommitLineData
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, /* no need to create */
241};
242
243/*
244 * Each thread_data structure has a number of files associated with it,
245 * this structure holds state information for a single file.
246 */
247struct fio_file {
248 enum fio_filetype filetype;
249
250 /*
251 * A file may not be a file descriptor, let the io engine decide
252 */
253 union {
254 unsigned long file_data;
255 int fd;
256 };
257 char *file_name;
258 void *mmap;
259 unsigned long long file_size;
260 unsigned long long real_file_size;
261 unsigned long long file_offset;
262 unsigned long long last_pos;
263 unsigned long long last_completed_pos;
264
265 /*
266 * block map for random io
267 */
268 unsigned long *file_map;
269 unsigned int num_maps;
270 unsigned int last_free_lookup;
271
272 int references;
273 enum fio_file_flags flags;
274};
275
276/*
277 * How many depth levels to log
278 */
279#define FIO_IO_U_MAP_NR 8
280#define FIO_IO_U_LAT_NR 12
281
282struct thread_stat {
283 char *name;
284 char *verror;
285 int error;
286 int groupid;
287 pid_t pid;
288 char *description;
289 int members;
290
291 struct io_log *slat_log;
292 struct io_log *clat_log;
293 struct io_log *bw_log;
294
295 /*
296 * bandwidth and latency stats
297 */
298 struct io_stat clat_stat[2]; /* completion latency */
299 struct io_stat slat_stat[2]; /* submission latency */
300 struct io_stat bw_stat[2]; /* bandwidth stats */
301
302 unsigned long long stat_io_bytes[2];
303 struct timeval stat_sample_time[2];
304
305 /*
306 * fio system usage accounting
307 */
308 struct rusage ru_start;
309 struct rusage ru_end;
310 unsigned long usr_time;
311 unsigned long sys_time;
312 unsigned long ctx;
313
314 /*
315 * IO depth and latency stats
316 */
317 unsigned int io_u_map[FIO_IO_U_MAP_NR];
318 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
319 unsigned long total_io_u[2];
320
321 unsigned long long io_bytes[2];
322 unsigned long runtime[2];
323 unsigned long total_run_time;
324};
325
326struct thread_options {
327 int pad;
328 char *description;
329 char *name;
330 char *directory;
331 char *filename;
332 char *opendir;
333 char *ioengine;
334 enum td_ddir td_ddir;
335 unsigned int ddir_nr;
336 unsigned int iodepth;
337 unsigned int iodepth_low;
338 unsigned int iodepth_batch;
339
340 unsigned long long size;
341 unsigned long long file_size_low;
342 unsigned long long file_size_high;
343 unsigned long long start_offset;
344
345 unsigned int bs[2];
346 unsigned int min_bs[2];
347 unsigned int max_bs[2];
348
349 unsigned int nr_files;
350 unsigned int open_files;
351
352 unsigned int odirect;
353 unsigned int invalidate_cache;
354 unsigned int create_serialize;
355 unsigned int create_fsync;
356 unsigned int end_fsync;
357 unsigned int sync_io;
358 unsigned int verify;
359 unsigned int use_thread;
360 unsigned int unlink;
361 unsigned int do_disk_util;
362 unsigned int override_sync;
363 unsigned int rand_repeatable;
364 unsigned int write_lat_log;
365 unsigned int write_bw_log;
366 unsigned int norandommap;
367 unsigned int bs_unaligned;
368 unsigned int fsync_on_close;
369
370 unsigned int hugepage_size;
371 unsigned int rw_min_bs;
372 unsigned int thinktime;
373 unsigned int thinktime_spin;
374 unsigned int thinktime_blocks;
375 unsigned int fsync_blocks;
376 unsigned int start_delay;
377 unsigned long timeout;
378 unsigned int overwrite;
379 unsigned int bw_avg_time;
380 unsigned int loops;
381 unsigned long long zone_size;
382 unsigned long long zone_skip;
383 enum fio_memtype mem_type;
384
385 unsigned int stonewall;
386 unsigned int new_group;
387 unsigned int numjobs;
388 os_cpu_mask_t cpumask;
389 unsigned int iolog;
390 unsigned int read_iolog;
391 unsigned int rwmixcycle;
392 unsigned int rwmix[2];
393 unsigned int nice;
394 unsigned int file_service_type;
395 unsigned int group_reporting;
396 unsigned int fadvise_hint;
397
398 char *read_iolog_file;
399 char *write_iolog_file;
400
401 /*
402 * Pre-run and post-run shell
403 */
404 char *exec_prerun;
405 char *exec_postrun;
406
407 unsigned int rate;
408 unsigned int ratemin;
409 unsigned int ratecycle;
410 unsigned int rate_iops;
411 unsigned int rate_iops_min;
412
413 char *ioscheduler;
414
415 /*
416 * CPU "io" cycle burner
417 */
418 unsigned int cpuload;
419 unsigned int cpucycle;
420};
421
422#define FIO_VERROR_SIZE 128
423
424/*
425 * This describes a single thread/process executing a fio job.
426 */
427struct thread_data {
428 struct thread_options o;
429 char verror[FIO_VERROR_SIZE];
430 pthread_t thread;
431 int thread_number;
432 int groupid;
433 struct thread_stat ts;
434 struct fio_file *files;
435 unsigned int files_index;
436 unsigned int nr_open_files;
437 unsigned int nr_normal_files;
438 union {
439 unsigned int next_file;
440 os_random_state_t next_file_state;
441 };
442 int error;
443 pid_t pid;
444 char *orig_buffer;
445 size_t orig_buffer_size;
446 volatile int terminate;
447 volatile int runstate;
448 unsigned int ioprio;
449 unsigned int last_was_sync;
450
451 char *mmapfile;
452 int mmapfd;
453
454 void *iolog_buf;
455 FILE *iolog_f;
456
457 char *sysfs_root;
458
459 os_random_state_t bsrange_state;
460 os_random_state_t verify_state;
461
462 int shm_id;
463
464 /*
465 * IO engine hooks, contains everything needed to submit an io_u
466 * to any of the available IO engines.
467 */
468 struct ioengine_ops *io_ops;
469
470 /*
471 * Current IO depth and list of free and busy io_u's.
472 */
473 unsigned int cur_depth;
474 struct list_head io_u_freelist;
475 struct list_head io_u_busylist;
476 struct list_head io_u_requeues;
477 unsigned int io_u_queued;
478
479 /*
480 * Rate state
481 */
482 unsigned long rate_usec_cycle;
483 long rate_pending_usleep;
484 unsigned long rate_bytes;
485 unsigned long rate_blocks;
486 struct timeval lastrate;
487
488 unsigned long long io_size;
489 unsigned long long total_io_size;
490
491 unsigned long io_issues[2];
492 unsigned long long io_blocks[2];
493 unsigned long long io_bytes[2];
494 unsigned long long this_io_bytes[2];
495 unsigned long long zone_bytes;
496 struct fio_sem *mutex;
497
498 /*
499 * State for random io, a bitmap of blocks done vs not done
500 */
501 os_random_state_t random_state;
502
503 struct timeval start; /* start of this loop */
504 struct timeval epoch; /* time job was started */
505 struct timeval rw_end[2];
506 unsigned int rw_end_set[2];
507
508 /*
509 * read/write mixed workload state
510 */
511 os_random_state_t rwmix_state;
512 unsigned long long rwmix_bytes;
513 struct timeval rwmix_switch;
514 enum fio_ddir rwmix_ddir;
515 unsigned int ddir_nr;
516
517 /*
518 * IO historic logs
519 */
520 struct rb_root io_hist_tree;
521 struct list_head io_log_list;
522
523 /*
524 * timeout handling
525 */
526 struct timeval timeout_end;
527 struct itimerval timer;
528
529 /*
530 * for fileservice, how often to switch to a new file
531 */
532 unsigned int file_service_nr;
533 unsigned int file_service_left;
534 struct fio_file *file_service_file;
535
536 /*
537 * For generating file sizes
538 */
539 os_random_state_t file_size_state;
540};
541
542/*
543 * roundrobin available files, or choose one at random.
544 */
545enum {
546 FIO_FSERVICE_RANDOM = 1,
547 FIO_FSERVICE_RR = 2,
548};
549
550/*
551 * 30 second per-io_u timeout, with 5 second intervals to avoid resetting
552 * the timer on each queue operation.
553 */
554#define IO_U_TIMEOUT_INC 5
555#define IO_U_TIMEOUT 30
556
557#define __td_verror(td, err, msg, func) \
558 do { \
559 if ((td)->error) \
560 break; \
561 int e = (err); \
562 (td)->error = e; \
563 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
564 } while (0)
565
566
567#define td_verror(td, err, func) \
568 __td_verror((td), (err), strerror((err)), (func))
569#define td_vmsg(td, err, msg, func) \
570 __td_verror((td), (err), (msg), (func))
571
572extern int exitall_on_terminate;
573extern int thread_number;
574extern int nr_process, nr_thread;
575extern int shm_id;
576extern int groupid;
577extern int terse_output;
578extern FILE *f_out;
579extern FILE *f_err;
580extern int temp_stall_ts;
581extern unsigned long long mlock_size;
582extern unsigned long page_mask, page_size;
583
584extern struct thread_data *threads;
585
586#define td_read(td) ((td)->o.td_ddir & TD_DDIR_READ)
587#define td_write(td) ((td)->o.td_ddir & TD_DDIR_WRITE)
588#define td_rw(td) (((td)->o.td_ddir & TD_DDIR_RW) == TD_DDIR_RW)
589#define td_random(td) ((td)->o.td_ddir & TD_DDIR_RAND)
590
591#define BLOCKS_PER_MAP (8 * sizeof(long))
592#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->o.rw_min_bs))
593#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
594#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
595
596#define MAX_JOBS (1024)
597
598static inline int should_fsync(struct thread_data *td)
599{
600 if (td->last_was_sync)
601 return 0;
602 if (td->o.odirect)
603 return 0;
604 if (td_write(td) || td_rw(td) || td->o.override_sync)
605 return 1;
606
607 return 0;
608}
609
610/*
611 * Disk utils as read in /sys/block/<dev>/stat
612 */
613struct disk_util_stat {
614 unsigned ios[2];
615 unsigned merges[2];
616 unsigned long long sectors[2];
617 unsigned ticks[2];
618 unsigned io_ticks;
619 unsigned time_in_queue;
620};
621
622/*
623 * Per-device disk util management
624 */
625struct disk_util {
626 struct list_head list;
627
628 char *name;
629 char path[256];
630 dev_t dev;
631
632 struct disk_util_stat dus;
633 struct disk_util_stat last_dus;
634
635 unsigned long msec;
636 struct timeval time;
637};
638
639#define DISK_UTIL_MSEC (250)
640
641#ifndef min
642#define min(a, b) ((a) < (b) ? (a) : (b))
643#endif
644#ifndef max
645#define max(a, b) ((a) > (b) ? (a) : (b))
646#endif
647
648/*
649 * Log exports
650 */
651extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
652extern void write_iolog_put(struct thread_data *, struct io_u *);
653extern int __must_check init_iolog(struct thread_data *td);
654extern void log_io_piece(struct thread_data *, struct io_u *);
655extern void prune_io_piece_log(struct thread_data *);
656extern void write_iolog_close(struct thread_data *);
657
658/*
659 * Logging
660 */
661extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
662extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
663extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
664extern void show_run_stats(void);
665extern void init_disk_util(struct thread_data *);
666extern void update_rusage_stat(struct thread_data *);
667extern void update_io_ticks(void);
668extern void disk_util_timer_arm(void);
669extern void setup_log(struct io_log **);
670extern void finish_log(struct thread_data *, struct io_log *, const char *);
671extern void __finish_log(struct io_log *, const char *);
672extern struct io_log *agg_io_log[2];
673extern int write_bw_log;
674extern void add_agg_sample(unsigned long, enum fio_ddir);
675
676/*
677 * Time functions
678 */
679extern unsigned long utime_since(struct timeval *, struct timeval *);
680extern unsigned long utime_since_now(struct timeval *);
681extern unsigned long mtime_since(struct timeval *, struct timeval *);
682extern unsigned long mtime_since_now(struct timeval *);
683extern unsigned long time_since_now(struct timeval *);
684extern unsigned long mtime_since_genesis(void);
685extern void __usec_sleep(unsigned int);
686extern void usec_sleep(struct thread_data *, unsigned long);
687extern void rate_throttle(struct thread_data *, unsigned long, unsigned int);
688extern void fill_start_time(struct timeval *);
689extern void fio_gettime(struct timeval *, void *);
690extern void set_genesis_time(void);
691
692/*
693 * Init/option functions
694 */
695extern int __must_check parse_options(int, char **);
696extern int fio_option_parse(struct thread_data *, const char *);
697extern int fio_cmd_option_parse(struct thread_data *, const char *, char *);
698extern void fio_fill_default_options(struct thread_data *);
699extern int fio_show_option_help(const char *);
700extern void fio_options_dup_and_init(struct option *);
701extern void options_mem_dupe(struct thread_data *);
702extern void options_mem_free(struct thread_data *);
703#define FIO_GETOPT_JOB 0x89988998
704#define FIO_NR_OPTIONS 128
705
706/*
707 * File setup/shutdown
708 */
709extern void close_files(struct thread_data *);
710extern int __must_check setup_files(struct thread_data *);
711extern int __must_check open_files(struct thread_data *);
712extern int __must_check file_invalidate_cache(struct thread_data *, struct fio_file *);
713extern int __must_check generic_open_file(struct thread_data *, struct fio_file *);
714extern void generic_close_file(struct thread_data *, struct fio_file *);
715extern void add_file(struct thread_data *, const char *);
716extern void get_file(struct fio_file *);
717extern void put_file(struct thread_data *, struct fio_file *);
718extern int add_dir_files(struct thread_data *, const char *);
719extern int init_random_map(struct thread_data *);
720extern void dup_files(struct thread_data *, struct thread_data *);
721
722/*
723 * ETA/status stuff
724 */
725extern void print_thread_status(void);
726extern void print_status_init(int);
727
728/*
729 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
730 * will never back again. It may cycle between running/verififying/fsyncing.
731 * Once the thread reaches TD_EXITED, it is just waiting for the core to
732 * reap it.
733 */
734enum {
735 TD_NOT_CREATED = 0,
736 TD_CREATED,
737 TD_INITIALIZED,
738 TD_RUNNING,
739 TD_VERIFYING,
740 TD_FSYNCING,
741 TD_EXITED,
742 TD_REAPED,
743};
744
745/*
746 * Verify helpers
747 */
748extern void populate_verify_io_u(struct thread_data *, struct io_u *);
749extern int __must_check get_next_verify(struct thread_data *td, struct io_u *);
750extern int __must_check verify_io_u(struct thread_data *, struct io_u *);
751
752/*
753 * Memory helpers
754 */
755extern int __must_check fio_pin_memory(void);
756extern void fio_unpin_memory(void);
757extern int __must_check allocate_io_mem(struct thread_data *);
758extern void free_io_mem(struct thread_data *);
759
760/*
761 * io unit handling
762 */
763#define queue_full(td) list_empty(&(td)->io_u_freelist)
764extern struct io_u *__get_io_u(struct thread_data *);
765extern struct io_u *get_io_u(struct thread_data *);
766extern void put_io_u(struct thread_data *, struct io_u *);
767extern void requeue_io_u(struct thread_data *, struct io_u **);
768extern long __must_check io_u_sync_complete(struct thread_data *, struct io_u *);
769extern long __must_check io_u_queued_complete(struct thread_data *, int);
770extern void io_u_queued(struct thread_data *, struct io_u *);
771extern void io_u_log_error(struct thread_data *, struct io_u *);
772extern void io_u_init_timeout(void);
773extern void io_u_set_timeout(struct thread_data *);
774extern void io_u_mark_depth(struct thread_data *, struct io_u *);
775
776/*
777 * io engine entry points
778 */
779extern int __must_check td_io_init(struct thread_data *);
780extern int __must_check td_io_prep(struct thread_data *, struct io_u *);
781extern int __must_check td_io_queue(struct thread_data *, struct io_u *);
782extern int __must_check td_io_sync(struct thread_data *, struct fio_file *);
783extern int __must_check td_io_getevents(struct thread_data *, int, int, struct timespec *);
784extern int __must_check td_io_commit(struct thread_data *);
785extern int __must_check td_io_open_file(struct thread_data *, struct fio_file *);
786extern void td_io_close_file(struct thread_data *, struct fio_file *);
787
788/*
789 * If logging output to a file, stderr should go to both stderr and f_err
790 */
791#define log_err(args...) do { \
792 fprintf(f_err, ##args); \
793 if (f_err != stderr) \
794 fprintf(stderr, ##args); \
795 } while (0)
796
797#define log_info(args...) fprintf(f_out, ##args)
798
799FILE *get_f_out(void);
800FILE *get_f_err(void);
801
802struct ioengine_ops {
803 struct list_head list;
804 char name[16];
805 int version;
806 int flags;
807 int (*setup)(struct thread_data *);
808 int (*init)(struct thread_data *);
809 int (*prep)(struct thread_data *, struct io_u *);
810 int (*queue)(struct thread_data *, struct io_u *);
811 int (*commit)(struct thread_data *);
812 int (*getevents)(struct thread_data *, int, int, struct timespec *);
813 struct io_u *(*event)(struct thread_data *, int);
814 int (*cancel)(struct thread_data *, struct io_u *);
815 void (*cleanup)(struct thread_data *);
816 int (*open_file)(struct thread_data *, struct fio_file *);
817 void (*close_file)(struct thread_data *, struct fio_file *);
818 void *data;
819 void *dlhandle;
820};
821
822#define FIO_IOOPS_VERSION 6
823
824extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
825extern void register_ioengine(struct ioengine_ops *);
826extern void unregister_ioengine(struct ioengine_ops *);
827extern void close_ioengine(struct thread_data *);
828
829/*
830 * Mark unused variables passed to ops functions as unused, to silence gcc
831 */
832#define fio_unused __attribute((__unused__))
833#define fio_init __attribute__((constructor))
834#define fio_exit __attribute__((destructor))
835
836#define for_each_td(td, i) \
837 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
838#define for_each_file(td, f, i) \
839 for ((i) = 0, (f) = &(td)->files[0]; (i) < (td)->o.nr_files; (i)++, (f)++)
840
841#define fio_assert(td, cond) do { \
842 if (!(cond)) { \
843 int *__foo = NULL; \
844 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
845 (td)->runstate = TD_EXITED; \
846 (td)->error = EFAULT; \
847 *__foo = 0; \
848 } \
849} while (0)
850
851#endif
fio - Flexible IO Tester