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