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