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Remove kernel headers from rbtree.h
[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 "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 FIO_FILE_NOSORT = 1 << 4, /* don't sort verify blocks */
242};
243
244/*
245 * Each thread_data structure has a number of files associated with it,
246 * this structure holds state information for a single file.
247 */
248struct fio_file {
249 enum fio_filetype filetype;
250
251 /*
252 * A file may not be a file descriptor, let the io engine decide
253 */
254 union {
255 unsigned long file_data;
256 int fd;
257 };
258 char *file_name;
259 void *mmap;
260 unsigned long long file_size;
261 unsigned long long real_file_size;
262 unsigned long long file_offset;
263 unsigned long long last_pos;
264 unsigned long long last_completed_pos;
265
266 /*
267 * block map for random io
268 */
269 unsigned long *file_map;
270 unsigned int num_maps;
271 unsigned int last_free_lookup;
272
273 int references;
274 enum fio_file_flags flags;
275};
276
277/*
278 * How many depth levels to log
279 */
280#define FIO_IO_U_MAP_NR 8
281#define FIO_IO_U_LAT_NR 12
282
283struct thread_stat {
284 char *name;
285 char *verror;
286 int error;
287 int groupid;
288 pid_t pid;
289 char *description;
290 int members;
291
292 struct io_log *slat_log;
293 struct io_log *clat_log;
294 struct io_log *bw_log;
295
296 /*
297 * bandwidth and latency stats
298 */
299 struct io_stat clat_stat[2]; /* completion latency */
300 struct io_stat slat_stat[2]; /* submission latency */
301 struct io_stat bw_stat[2]; /* bandwidth stats */
302
303 unsigned long long stat_io_bytes[2];
304 struct timeval stat_sample_time[2];
305
306 /*
307 * fio system usage accounting
308 */
309 struct rusage ru_start;
310 struct rusage ru_end;
311 unsigned long usr_time;
312 unsigned long sys_time;
313 unsigned long ctx;
314
315 /*
316 * IO depth and latency stats
317 */
318 unsigned int io_u_map[FIO_IO_U_MAP_NR];
319 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
320 unsigned long total_io_u[2];
321
322 unsigned long long io_bytes[2];
323 unsigned long runtime[2];
324 unsigned long total_run_time;
325};
326
327struct thread_options {
328 int pad;
329 char *description;
330 char *name;
331 char *directory;
332 char *filename;
333 char *opendir;
334 char *ioengine;
335 enum td_ddir td_ddir;
336 unsigned int ddir_nr;
337 unsigned int iodepth;
338 unsigned int iodepth_low;
339 unsigned int iodepth_batch;
340
341 unsigned long long size;
342 unsigned long long file_size_low;
343 unsigned long long file_size_high;
344 unsigned long long start_offset;
345
346 unsigned int bs[2];
347 unsigned int min_bs[2];
348 unsigned int max_bs[2];
349
350 unsigned int nr_files;
351 unsigned int open_files;
352
353 unsigned int odirect;
354 unsigned int invalidate_cache;
355 unsigned int create_serialize;
356 unsigned int create_fsync;
357 unsigned int end_fsync;
358 unsigned int sync_io;
359 unsigned int verify;
360 unsigned int verifysort;
361 unsigned int use_thread;
362 unsigned int unlink;
363 unsigned int do_disk_util;
364 unsigned int override_sync;
365 unsigned int rand_repeatable;
366 unsigned int write_lat_log;
367 unsigned int write_bw_log;
368 unsigned int norandommap;
369 unsigned int bs_unaligned;
370 unsigned int fsync_on_close;
371
372 unsigned int hugepage_size;
373 unsigned int rw_min_bs;
374 unsigned int thinktime;
375 unsigned int thinktime_spin;
376 unsigned int thinktime_blocks;
377 unsigned int fsync_blocks;
378 unsigned int start_delay;
379 unsigned long timeout;
380 unsigned int overwrite;
381 unsigned int bw_avg_time;
382 unsigned int loops;
383 unsigned long long zone_size;
384 unsigned long long zone_skip;
385 enum fio_memtype mem_type;
386
387 unsigned int stonewall;
388 unsigned int new_group;
389 unsigned int numjobs;
390 os_cpu_mask_t cpumask;
391 unsigned int iolog;
392 unsigned int read_iolog;
393 unsigned int rwmixcycle;
394 unsigned int rwmix[2];
395 unsigned int nice;
396 unsigned int file_service_type;
397 unsigned int group_reporting;
398 unsigned int fadvise_hint;
399
400 char *read_iolog_file;
401 char *write_iolog_file;
402
403 /*
404 * Pre-run and post-run shell
405 */
406 char *exec_prerun;
407 char *exec_postrun;
408
409 unsigned int rate;
410 unsigned int ratemin;
411 unsigned int ratecycle;
412 unsigned int rate_iops;
413 unsigned int rate_iops_min;
414
415 char *ioscheduler;
416
417 /*
418 * CPU "io" cycle burner
419 */
420 unsigned int cpuload;
421 unsigned int cpucycle;
422};
423
424#define FIO_VERROR_SIZE 128
425
426/*
427 * This describes a single thread/process executing a fio job.
428 */
429struct thread_data {
430 struct thread_options o;
431 char verror[FIO_VERROR_SIZE];
432 pthread_t thread;
433 int thread_number;
434 int groupid;
435 struct thread_stat ts;
436 struct fio_file *files;
437 unsigned int files_index;
438 unsigned int nr_open_files;
439 unsigned int nr_normal_files;
440 union {
441 unsigned int next_file;
442 os_random_state_t next_file_state;
443 };
444 int error;
445 pid_t pid;
446 char *orig_buffer;
447 size_t orig_buffer_size;
448 volatile int terminate;
449 volatile int runstate;
450 unsigned int ioprio;
451 unsigned int last_was_sync;
452
453 char *mmapfile;
454 int mmapfd;
455
456 void *iolog_buf;
457 FILE *iolog_f;
458
459 char *sysfs_root;
460
461 os_random_state_t bsrange_state;
462 os_random_state_t verify_state;
463
464 int shm_id;
465
466 /*
467 * IO engine hooks, contains everything needed to submit an io_u
468 * to any of the available IO engines.
469 */
470 struct ioengine_ops *io_ops;
471
472 /*
473 * Current IO depth and list of free and busy io_u's.
474 */
475 unsigned int cur_depth;
476 struct list_head io_u_freelist;
477 struct list_head io_u_busylist;
478 struct list_head io_u_requeues;
479 unsigned int io_u_queued;
480
481 /*
482 * Rate state
483 */
484 unsigned long rate_usec_cycle;
485 long rate_pending_usleep;
486 unsigned long rate_bytes;
487 unsigned long rate_blocks;
488 struct timeval lastrate;
489
490 unsigned long long io_size;
491 unsigned long long total_io_size;
492
493 unsigned long io_issues[2];
494 unsigned long long io_blocks[2];
495 unsigned long long io_bytes[2];
496 unsigned long long this_io_bytes[2];
497 unsigned long long zone_bytes;
498 struct fio_sem *mutex;
499
500 /*
501 * State for random io, a bitmap of blocks done vs not done
502 */
503 os_random_state_t random_state;
504
505 struct timeval start; /* start of this loop */
506 struct timeval epoch; /* time job was started */
507 struct timeval rw_end[2];
508 unsigned int rw_end_set[2];
509
510 /*
511 * read/write mixed workload state
512 */
513 os_random_state_t rwmix_state;
514 unsigned long long rwmix_bytes;
515 struct timeval rwmix_switch;
516 enum fio_ddir rwmix_ddir;
517 unsigned int ddir_nr;
518
519 /*
520 * IO history logs for verification. We use a tree for sorting,
521 * if we are overwriting. Otherwise just use a fifo.
522 */
523 struct rb_root io_hist_tree;
524 struct list_head io_hist_list;
525
526 /*
527 * For IO replaying
528 */
529 struct list_head io_log_list;
530
531 /*
532 * timeout handling
533 */
534 struct timeval timeout_end;
535 struct itimerval timer;
536
537 /*
538 * for fileservice, how often to switch to a new file
539 */
540 unsigned int file_service_nr;
541 unsigned int file_service_left;
542 struct fio_file *file_service_file;
543
544 /*
545 * For generating file sizes
546 */
547 os_random_state_t file_size_state;
548};
549
550/*
551 * roundrobin available files, or choose one at random.
552 */
553enum {
554 FIO_FSERVICE_RANDOM = 1,
555 FIO_FSERVICE_RR = 2,
556};
557
558/*
559 * 30 second per-io_u timeout, with 5 second intervals to avoid resetting
560 * the timer on each queue operation.
561 */
562#define IO_U_TIMEOUT_INC 5
563#define IO_U_TIMEOUT 30
564
565#define __td_verror(td, err, msg, func) \
566 do { \
567 if ((td)->error) \
568 break; \
569 int e = (err); \
570 (td)->error = e; \
571 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
572 } while (0)
573
574
575#define td_verror(td, err, func) \
576 __td_verror((td), (err), strerror((err)), (func))
577#define td_vmsg(td, err, msg, func) \
578 __td_verror((td), (err), (msg), (func))
579
580extern int exitall_on_terminate;
581extern int thread_number;
582extern int nr_process, nr_thread;
583extern int shm_id;
584extern int groupid;
585extern int terse_output;
586extern FILE *f_out;
587extern FILE *f_err;
588extern int temp_stall_ts;
589extern unsigned long long mlock_size;
590extern unsigned long page_mask, page_size;
591
592extern struct thread_data *threads;
593
594#define td_read(td) ((td)->o.td_ddir & TD_DDIR_READ)
595#define td_write(td) ((td)->o.td_ddir & TD_DDIR_WRITE)
596#define td_rw(td) (((td)->o.td_ddir & TD_DDIR_RW) == TD_DDIR_RW)
597#define td_random(td) ((td)->o.td_ddir & TD_DDIR_RAND)
598
599#define BLOCKS_PER_MAP (8 * sizeof(long))
600#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->o.rw_min_bs))
601#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
602#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
603
604#define MAX_JOBS (1024)
605
606static inline int should_fsync(struct thread_data *td)
607{
608 if (td->last_was_sync)
609 return 0;
610 if (td->o.odirect)
611 return 0;
612 if (td_write(td) || td_rw(td) || td->o.override_sync)
613 return 1;
614
615 return 0;
616}
617
618/*
619 * Disk utils as read in /sys/block/<dev>/stat
620 */
621struct disk_util_stat {
622 unsigned ios[2];
623 unsigned merges[2];
624 unsigned long long sectors[2];
625 unsigned ticks[2];
626 unsigned io_ticks;
627 unsigned time_in_queue;
628};
629
630/*
631 * Per-device disk util management
632 */
633struct disk_util {
634 struct list_head list;
635
636 char *name;
637 char path[256];
638 dev_t dev;
639
640 struct disk_util_stat dus;
641 struct disk_util_stat last_dus;
642
643 unsigned long msec;
644 struct timeval time;
645};
646
647#define DISK_UTIL_MSEC (250)
648
649#ifndef min
650#define min(a, b) ((a) < (b) ? (a) : (b))
651#endif
652#ifndef max
653#define max(a, b) ((a) > (b) ? (a) : (b))
654#endif
655
656/*
657 * Log exports
658 */
659extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
660extern void write_iolog_put(struct thread_data *, struct io_u *);
661extern int __must_check init_iolog(struct thread_data *td);
662extern void log_io_piece(struct thread_data *, struct io_u *);
663extern void prune_io_piece_log(struct thread_data *);
664extern void write_iolog_close(struct thread_data *);
665
666/*
667 * Logging
668 */
669extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
670extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
671extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
672extern void show_run_stats(void);
673extern void init_disk_util(struct thread_data *);
674extern void update_rusage_stat(struct thread_data *);
675extern void update_io_ticks(void);
676extern void disk_util_timer_arm(void);
677extern void setup_log(struct io_log **);
678extern void finish_log(struct thread_data *, struct io_log *, const char *);
679extern void __finish_log(struct io_log *, const char *);
680extern struct io_log *agg_io_log[2];
681extern int write_bw_log;
682extern void add_agg_sample(unsigned long, enum fio_ddir);
683
684/*
685 * Time functions
686 */
687extern unsigned long utime_since(struct timeval *, struct timeval *);
688extern unsigned long utime_since_now(struct timeval *);
689extern unsigned long mtime_since(struct timeval *, struct timeval *);
690extern unsigned long mtime_since_now(struct timeval *);
691extern unsigned long time_since_now(struct timeval *);
692extern unsigned long mtime_since_genesis(void);
693extern void __usec_sleep(unsigned int);
694extern void usec_sleep(struct thread_data *, unsigned long);
695extern void rate_throttle(struct thread_data *, unsigned long, unsigned int);
696extern void fill_start_time(struct timeval *);
697extern void fio_gettime(struct timeval *, void *);
698extern void set_genesis_time(void);
699
700/*
701 * Init/option functions
702 */
703extern int __must_check parse_options(int, char **);
704extern int fio_option_parse(struct thread_data *, const char *);
705extern int fio_cmd_option_parse(struct thread_data *, const char *, char *);
706extern void fio_fill_default_options(struct thread_data *);
707extern int fio_show_option_help(const char *);
708extern void fio_options_dup_and_init(struct option *);
709extern void options_mem_dupe(struct thread_data *);
710extern void options_mem_free(struct thread_data *);
711#define FIO_GETOPT_JOB 0x89988998
712#define FIO_NR_OPTIONS 128
713
714/*
715 * File setup/shutdown
716 */
717extern void close_files(struct thread_data *);
718extern int __must_check setup_files(struct thread_data *);
719extern int __must_check open_files(struct thread_data *);
720extern int __must_check file_invalidate_cache(struct thread_data *, struct fio_file *);
721extern int __must_check generic_open_file(struct thread_data *, struct fio_file *);
722extern void generic_close_file(struct thread_data *, struct fio_file *);
723extern void add_file(struct thread_data *, const char *);
724extern void get_file(struct fio_file *);
725extern void put_file(struct thread_data *, struct fio_file *);
726extern int add_dir_files(struct thread_data *, const char *);
727extern int init_random_map(struct thread_data *);
728extern void dup_files(struct thread_data *, struct thread_data *);
729
730/*
731 * ETA/status stuff
732 */
733extern void print_thread_status(void);
734extern void print_status_init(int);
735
736/*
737 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
738 * will never back again. It may cycle between running/verififying/fsyncing.
739 * Once the thread reaches TD_EXITED, it is just waiting for the core to
740 * reap it.
741 */
742enum {
743 TD_NOT_CREATED = 0,
744 TD_CREATED,
745 TD_INITIALIZED,
746 TD_RUNNING,
747 TD_VERIFYING,
748 TD_FSYNCING,
749 TD_EXITED,
750 TD_REAPED,
751};
752
753/*
754 * Verify helpers
755 */
756extern void populate_verify_io_u(struct thread_data *, struct io_u *);
757extern int __must_check get_next_verify(struct thread_data *td, struct io_u *);
758extern int __must_check verify_io_u(struct thread_data *, struct io_u *);
759
760/*
761 * Memory helpers
762 */
763extern int __must_check fio_pin_memory(void);
764extern void fio_unpin_memory(void);
765extern int __must_check allocate_io_mem(struct thread_data *);
766extern void free_io_mem(struct thread_data *);
767
768/*
769 * io unit handling
770 */
771#define queue_full(td) list_empty(&(td)->io_u_freelist)
772extern struct io_u *__get_io_u(struct thread_data *);
773extern struct io_u *get_io_u(struct thread_data *);
774extern void put_io_u(struct thread_data *, struct io_u *);
775extern void requeue_io_u(struct thread_data *, struct io_u **);
776extern long __must_check io_u_sync_complete(struct thread_data *, struct io_u *);
777extern long __must_check io_u_queued_complete(struct thread_data *, int);
778extern void io_u_queued(struct thread_data *, struct io_u *);
779extern void io_u_log_error(struct thread_data *, struct io_u *);
780extern void io_u_init_timeout(void);
781extern void io_u_set_timeout(struct thread_data *);
782extern void io_u_mark_depth(struct thread_data *, struct io_u *);
783
784/*
785 * io engine entry points
786 */
787extern int __must_check td_io_init(struct thread_data *);
788extern int __must_check td_io_prep(struct thread_data *, struct io_u *);
789extern int __must_check td_io_queue(struct thread_data *, struct io_u *);
790extern int __must_check td_io_sync(struct thread_data *, struct fio_file *);
791extern int __must_check td_io_getevents(struct thread_data *, int, int, struct timespec *);
792extern int __must_check td_io_commit(struct thread_data *);
793extern int __must_check td_io_open_file(struct thread_data *, struct fio_file *);
794extern void td_io_close_file(struct thread_data *, struct fio_file *);
795
796/*
797 * If logging output to a file, stderr should go to both stderr and f_err
798 */
799#define log_err(args...) do { \
800 fprintf(f_err, ##args); \
801 if (f_err != stderr) \
802 fprintf(stderr, ##args); \
803 } while (0)
804
805#define log_info(args...) fprintf(f_out, ##args)
806
807FILE *get_f_out(void);
808FILE *get_f_err(void);
809
810struct ioengine_ops {
811 struct list_head list;
812 char name[16];
813 int version;
814 int flags;
815 int (*setup)(struct thread_data *);
816 int (*init)(struct thread_data *);
817 int (*prep)(struct thread_data *, struct io_u *);
818 int (*queue)(struct thread_data *, struct io_u *);
819 int (*commit)(struct thread_data *);
820 int (*getevents)(struct thread_data *, int, int, struct timespec *);
821 struct io_u *(*event)(struct thread_data *, int);
822 int (*cancel)(struct thread_data *, struct io_u *);
823 void (*cleanup)(struct thread_data *);
824 int (*open_file)(struct thread_data *, struct fio_file *);
825 void (*close_file)(struct thread_data *, struct fio_file *);
826 void *data;
827 void *dlhandle;
828};
829
830#define FIO_IOOPS_VERSION 6
831
832extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
833extern void register_ioengine(struct ioengine_ops *);
834extern void unregister_ioengine(struct ioengine_ops *);
835extern void close_ioengine(struct thread_data *);
836
837/*
838 * Mark unused variables passed to ops functions as unused, to silence gcc
839 */
840#define fio_unused __attribute((__unused__))
841#define fio_init __attribute__((constructor))
842#define fio_exit __attribute__((destructor))
843
844#define for_each_td(td, i) \
845 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
846#define for_each_file(td, f, i) \
847 for ((i) = 0, (f) = &(td)->files[0]; (i) < (td)->o.nr_files; (i)++, (f)++)
848
849#define fio_assert(td, cond) do { \
850 if (!(cond)) { \
851 int *__foo = NULL; \
852 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
853 (td)->runstate = TD_EXITED; \
854 (td)->error = EFAULT; \
855 *__foo = 0; \
856 } \
857} while (0)
858
859#endif
fio - Flexible IO Tester