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Fio 1.15.1
[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 "compiler.h"
17#include "list.h"
18#include "rbtree.h"
19#include "md5.h"
20#include "crc32.h"
21#include "arch.h"
22#include "os.h"
23#include "mutex.h"
24
25#ifdef FIO_HAVE_SYSLET
26#include "syslet.h"
27#endif
28
29#ifdef FIO_HAVE_GUASI
30#include <guasi.h>
31#endif
32
33enum fio_ddir {
34 DDIR_READ = 0,
35 DDIR_WRITE,
36 DDIR_SYNC,
37};
38
39enum td_ddir {
40 TD_DDIR_READ = 1 << 0,
41 TD_DDIR_WRITE = 1 << 1,
42 TD_DDIR_RAND = 1 << 2,
43 TD_DDIR_RW = TD_DDIR_READ | TD_DDIR_WRITE,
44 TD_DDIR_RANDREAD = TD_DDIR_READ | TD_DDIR_RAND,
45 TD_DDIR_RANDWRITE = TD_DDIR_WRITE | TD_DDIR_RAND,
46 TD_DDIR_RANDRW = TD_DDIR_RW | TD_DDIR_RAND,
47};
48
49/*
50 * Use for maintaining statistics
51 */
52struct io_stat {
53 unsigned long max_val;
54 unsigned long min_val;
55 unsigned long samples;
56
57 double mean;
58 double S;
59};
60
61/*
62 * A single data sample
63 */
64struct io_sample {
65 unsigned long time;
66 unsigned long val;
67 enum fio_ddir ddir;
68};
69
70/*
71 * Dynamically growing data sample log
72 */
73struct io_log {
74 unsigned long nr_samples;
75 unsigned long max_samples;
76 struct io_sample *log;
77};
78
79/*
80 * When logging io actions, this matches a single sent io_u
81 */
82struct io_piece {
83 union {
84 struct rb_node rb_node;
85 struct list_head list;
86 };
87 struct fio_file *file;
88 unsigned long long offset;
89 unsigned long len;
90 enum fio_ddir ddir;
91};
92
93#ifdef FIO_HAVE_SYSLET
94struct syslet_req {
95 struct syslet_uatom atom; /* the atom to submit */
96 struct syslet_uatom *head; /* head of the sequence */
97 long ret; /* syscall return value */
98};
99#endif
100
101enum {
102 IO_U_F_FREE = 1 << 0,
103 IO_U_F_FLIGHT = 1 << 1,
104};
105
106struct thread_data;
107
108/*
109 * The io unit
110 */
111struct io_u {
112 union {
113#ifdef FIO_HAVE_LIBAIO
114 struct iocb iocb;
115#endif
116#ifdef FIO_HAVE_POSIXAIO
117 struct aiocb aiocb;
118#endif
119#ifdef FIO_HAVE_SGIO
120 struct sg_io_hdr hdr;
121#endif
122#ifdef FIO_HAVE_SYSLET
123 struct syslet_req req;
124#endif
125#ifdef FIO_HAVE_GUASI
126 guasi_req_t greq;
127#endif
128 };
129 struct timeval start_time;
130 struct timeval issue_time;
131
132 /*
133 * Allocated/set buffer and length
134 */
135 void *buf;
136 unsigned long buflen;
137 unsigned long long offset;
138
139 /*
140 * IO engine state, may be different from above when we get
141 * partial transfers / residual data counts
142 */
143 void *xfer_buf;
144 unsigned long xfer_buflen;
145
146 unsigned int resid;
147 unsigned int error;
148
149 enum fio_ddir ddir;
150
151 /*
152 * io engine private data
153 */
154 union {
155 unsigned int index;
156 unsigned int seen;
157 };
158
159 unsigned int flags;
160
161 struct fio_file *file;
162
163 struct list_head list;
164
165 /*
166 * Callback for io completion
167 */
168 int (*end_io)(struct thread_data *, struct io_u *);
169};
170
171/*
172 * io_ops->queue() return values
173 */
174enum {
175 FIO_Q_COMPLETED = 0, /* completed sync */
176 FIO_Q_QUEUED = 1, /* queued, will complete async */
177 FIO_Q_BUSY = 2, /* no more room, call ->commit() */
178};
179
180#define FIO_HDR_MAGIC 0xf00baaef
181
182enum {
183 VERIFY_NONE = 0, /* no verification */
184 VERIFY_MD5, /* md5 sum data blocks */
185 VERIFY_CRC32, /* crc32 sum data blocks */
186 VERIFY_NULL, /* pretend to verify */
187};
188
189/*
190 * A header structure associated with each checksummed data block
191 */
192struct verify_header {
193 unsigned int fio_magic;
194 unsigned int len;
195 unsigned int verify_type;
196 union {
197 char md5_digest[MD5_HASH_WORDS * 4];
198 unsigned long crc32;
199 };
200};
201
202struct group_run_stats {
203 unsigned long long max_run[2], min_run[2];
204 unsigned long long max_bw[2], min_bw[2];
205 unsigned long long io_kb[2];
206 unsigned long long agg[2];
207};
208
209/*
210 * What type of allocation to use for io buffers
211 */
212enum fio_memtype {
213 MEM_MALLOC = 0, /* ordinary malloc */
214 MEM_SHM, /* use shared memory segments */
215 MEM_SHMHUGE, /* use shared memory segments with huge pages */
216 MEM_MMAP, /* use anonynomous mmap */
217 MEM_MMAPHUGE, /* memory mapped huge file */
218};
219
220/*
221 * The type of object we are working on
222 */
223enum fio_filetype {
224 FIO_TYPE_FILE = 1, /* plain file */
225 FIO_TYPE_BD, /* block device */
226 FIO_TYPE_CHAR, /* character device */
227};
228
229enum fio_ioengine_flags {
230 FIO_SYNCIO = 1 << 0, /* io engine has synchronous ->queue */
231 FIO_RAWIO = 1 << 1, /* some sort of direct/raw io */
232 FIO_DISKLESSIO = 1 << 2, /* no disk involved */
233 FIO_NOEXTEND = 1 << 3, /* engine can't extend file */
234 FIO_NODISKUTIL = 1 << 4, /* diskutil can't handle filename */
235};
236
237enum fio_file_flags {
238 FIO_FILE_OPEN = 1 << 0, /* file is open */
239 FIO_FILE_UNLINK = 1 << 1, /* unlink on close */
240 FIO_FILE_CLOSING = 1 << 2, /* file being closed */
241 FIO_FILE_EXISTS = 1 << 3, /* file there */
242 FIO_FILE_EXTEND = 1 << 4, /* needs extend */
243 FIO_FILE_NOSORT = 1 << 5, /* don't sort verify blocks */
244 FIO_FILE_DONE = 1 << 6, /* io completed to this file */
245 FIO_SIZE_KNOWN = 1 << 7, /* size has been set */
246};
247
248/*
249 * Each thread_data structure has a number of files associated with it,
250 * this structure holds state information for a single file.
251 */
252struct fio_file {
253 enum fio_filetype filetype;
254
255 /*
256 * A file may not be a file descriptor, let the io engine decide
257 */
258 union {
259 unsigned long file_data;
260 int fd;
261 };
262
263 /*
264 * filename and possible memory mapping
265 */
266 char *file_name;
267 void *mmap;
268
269 /*
270 * size of the file, offset into file, and io size from that offset
271 */
272 unsigned long long real_file_size;
273 unsigned long long file_offset;
274 unsigned long long io_size;
275
276 unsigned long long last_pos;
277 unsigned long long last_completed_pos;
278
279 /*
280 * block map for random io
281 */
282 unsigned long *file_map;
283 unsigned int num_maps;
284 unsigned int last_free_lookup;
285
286 int references;
287 enum fio_file_flags flags;
288};
289
290/*
291 * How many depth levels to log
292 */
293#define FIO_IO_U_MAP_NR 8
294#define FIO_IO_U_LAT_NR 12
295
296struct thread_stat {
297 char *name;
298 char *verror;
299 int error;
300 int groupid;
301 pid_t pid;
302 char *description;
303 int members;
304
305 struct io_log *slat_log;
306 struct io_log *clat_log;
307 struct io_log *bw_log;
308
309 /*
310 * bandwidth and latency stats
311 */
312 struct io_stat clat_stat[2]; /* completion latency */
313 struct io_stat slat_stat[2]; /* submission latency */
314 struct io_stat bw_stat[2]; /* bandwidth stats */
315
316 unsigned long long stat_io_bytes[2];
317 struct timeval stat_sample_time[2];
318
319 /*
320 * fio system usage accounting
321 */
322 struct rusage ru_start;
323 struct rusage ru_end;
324 unsigned long usr_time;
325 unsigned long sys_time;
326 unsigned long ctx;
327
328 /*
329 * IO depth and latency stats
330 */
331 unsigned int io_u_map[FIO_IO_U_MAP_NR];
332 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
333 unsigned long total_io_u[2];
334
335 unsigned long long io_bytes[2];
336 unsigned long runtime[2];
337 unsigned long total_run_time;
338};
339
340struct thread_options {
341 int pad;
342 char *description;
343 char *name;
344 char *directory;
345 char *filename;
346 char *opendir;
347 char *ioengine;
348 enum td_ddir td_ddir;
349 unsigned int ddir_nr;
350 unsigned int iodepth;
351 unsigned int iodepth_low;
352 unsigned int iodepth_batch;
353
354 unsigned long long size;
355 unsigned long long file_size_low;
356 unsigned long long file_size_high;
357 unsigned long long start_offset;
358
359 unsigned int bs[2];
360 unsigned int min_bs[2];
361 unsigned int max_bs[2];
362
363 unsigned int nr_files;
364 unsigned int open_files;
365
366 unsigned int odirect;
367 unsigned int invalidate_cache;
368 unsigned int create_serialize;
369 unsigned int create_fsync;
370 unsigned int end_fsync;
371 unsigned int sync_io;
372 unsigned int verify;
373 unsigned int verifysort;
374 unsigned int use_thread;
375 unsigned int unlink;
376 unsigned int do_disk_util;
377 unsigned int override_sync;
378 unsigned int rand_repeatable;
379 unsigned int write_lat_log;
380 unsigned int write_bw_log;
381 unsigned int norandommap;
382 unsigned int bs_unaligned;
383 unsigned int fsync_on_close;
384
385 unsigned int hugepage_size;
386 unsigned int rw_min_bs;
387 unsigned int thinktime;
388 unsigned int thinktime_spin;
389 unsigned int thinktime_blocks;
390 unsigned int fsync_blocks;
391 unsigned int start_delay;
392 unsigned long timeout;
393 unsigned int overwrite;
394 unsigned int bw_avg_time;
395 unsigned int loops;
396 unsigned long long zone_size;
397 unsigned long long zone_skip;
398 enum fio_memtype mem_type;
399
400 unsigned int stonewall;
401 unsigned int new_group;
402 unsigned int numjobs;
403 os_cpu_mask_t cpumask;
404 unsigned int iolog;
405 unsigned int read_iolog;
406 unsigned int rwmixcycle;
407 unsigned int rwmix[2];
408 unsigned int nice;
409 unsigned int file_service_type;
410 unsigned int group_reporting;
411 unsigned int fadvise_hint;
412
413 char *read_iolog_file;
414 char *write_iolog_file;
415
416 /*
417 * Pre-run and post-run shell
418 */
419 char *exec_prerun;
420 char *exec_postrun;
421
422 unsigned int rate;
423 unsigned int ratemin;
424 unsigned int ratecycle;
425 unsigned int rate_iops;
426 unsigned int rate_iops_min;
427
428 char *ioscheduler;
429
430 /*
431 * CPU "io" cycle burner
432 */
433 unsigned int cpuload;
434 unsigned int cpucycle;
435};
436
437#define FIO_VERROR_SIZE 128
438
439/*
440 * This describes a single thread/process executing a fio job.
441 */
442struct thread_data {
443 struct thread_options o;
444 char verror[FIO_VERROR_SIZE];
445 pthread_t thread;
446 int thread_number;
447 int groupid;
448 struct thread_stat ts;
449 struct fio_file *files;
450 unsigned int files_index;
451 unsigned int nr_open_files;
452 unsigned int nr_done_files;
453 unsigned int nr_normal_files;
454 union {
455 unsigned int next_file;
456 os_random_state_t next_file_state;
457 };
458 int error;
459 pid_t pid;
460 char *orig_buffer;
461 size_t orig_buffer_size;
462 volatile int terminate;
463 volatile int runstate;
464 unsigned int ioprio;
465 unsigned int last_was_sync;
466
467 char *mmapfile;
468 int mmapfd;
469
470 void *iolog_buf;
471 FILE *iolog_f;
472
473 char *sysfs_root;
474
475 os_random_state_t bsrange_state;
476 os_random_state_t verify_state;
477
478 int shm_id;
479
480 /*
481 * IO engine hooks, contains everything needed to submit an io_u
482 * to any of the available IO engines.
483 */
484 struct ioengine_ops *io_ops;
485
486 /*
487 * Current IO depth and list of free and busy io_u's.
488 */
489 unsigned int cur_depth;
490 struct list_head io_u_freelist;
491 struct list_head io_u_busylist;
492 struct list_head io_u_requeues;
493 unsigned int io_u_queued;
494
495 /*
496 * Rate state
497 */
498 unsigned long rate_usec_cycle;
499 long rate_pending_usleep;
500 unsigned long rate_bytes;
501 unsigned long rate_blocks;
502 struct timeval lastrate;
503
504 unsigned long long total_io_size;
505
506 unsigned long io_issues[2];
507 unsigned long long io_blocks[2];
508 unsigned long long io_bytes[2];
509 unsigned long long this_io_bytes[2];
510 unsigned long long zone_bytes;
511 struct fio_sem *mutex;
512
513 /*
514 * State for random io, a bitmap of blocks done vs not done
515 */
516 os_random_state_t random_state;
517
518 struct timeval start; /* start of this loop */
519 struct timeval epoch; /* time job was started */
520 struct timeval rw_end[2];
521 unsigned int rw_end_set[2];
522
523 /*
524 * read/write mixed workload state
525 */
526 os_random_state_t rwmix_state;
527 unsigned long long rwmix_bytes;
528 struct timeval rwmix_switch;
529 enum fio_ddir rwmix_ddir;
530 unsigned int ddir_nr;
531
532 /*
533 * IO history logs for verification. We use a tree for sorting,
534 * if we are overwriting. Otherwise just use a fifo.
535 */
536 struct rb_root io_hist_tree;
537 struct list_head io_hist_list;
538
539 /*
540 * For IO replaying
541 */
542 struct list_head io_log_list;
543
544 /*
545 * timeout handling
546 */
547 struct timeval timeout_end;
548 struct itimerval timer;
549
550 /*
551 * for fileservice, how often to switch to a new file
552 */
553 unsigned int file_service_nr;
554 unsigned int file_service_left;
555 struct fio_file *file_service_file;
556
557 /*
558 * For generating file sizes
559 */
560 os_random_state_t file_size_state;
561};
562
563/*
564 * roundrobin available files, or choose one at random.
565 */
566enum {
567 FIO_FSERVICE_RANDOM = 1,
568 FIO_FSERVICE_RR = 2,
569};
570
571/*
572 * 30 second per-io_u timeout, with 5 second intervals to avoid resetting
573 * the timer on each queue operation.
574 */
575#define IO_U_TIMEOUT_INC 5
576#define IO_U_TIMEOUT 30
577
578#define __td_verror(td, err, msg, func) \
579 do { \
580 if ((td)->error) \
581 break; \
582 int e = (err); \
583 (td)->error = e; \
584 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
585 } while (0)
586
587
588#define td_verror(td, err, func) \
589 __td_verror((td), (err), strerror((err)), (func))
590#define td_vmsg(td, err, msg, func) \
591 __td_verror((td), (err), (msg), (func))
592
593extern int exitall_on_terminate;
594extern int thread_number;
595extern int nr_process, nr_thread;
596extern int shm_id;
597extern int groupid;
598extern int terse_output;
599extern FILE *f_out;
600extern FILE *f_err;
601extern int temp_stall_ts;
602extern unsigned long long mlock_size;
603extern unsigned long page_mask, page_size;
604
605extern struct thread_data *threads;
606
607#define td_read(td) ((td)->o.td_ddir & TD_DDIR_READ)
608#define td_write(td) ((td)->o.td_ddir & TD_DDIR_WRITE)
609#define td_rw(td) (((td)->o.td_ddir & TD_DDIR_RW) == TD_DDIR_RW)
610#define td_random(td) ((td)->o.td_ddir & TD_DDIR_RAND)
611
612#define BLOCKS_PER_MAP (8 * sizeof(long))
613#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->o.rw_min_bs))
614#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
615#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
616
617#define MAX_JOBS (1024)
618
619static inline int should_fsync(struct thread_data *td)
620{
621 if (td->last_was_sync)
622 return 0;
623 if (td->o.odirect)
624 return 0;
625 if (td_write(td) || td_rw(td) || td->o.override_sync)
626 return 1;
627
628 return 0;
629}
630
631/*
632 * Disk utils as read in /sys/block/<dev>/stat
633 */
634struct disk_util_stat {
635 unsigned ios[2];
636 unsigned merges[2];
637 unsigned long long sectors[2];
638 unsigned ticks[2];
639 unsigned io_ticks;
640 unsigned time_in_queue;
641};
642
643/*
644 * Per-device disk util management
645 */
646struct disk_util {
647 struct list_head list;
648
649 char *name;
650 char path[256];
651 dev_t dev;
652
653 struct disk_util_stat dus;
654 struct disk_util_stat last_dus;
655
656 unsigned long msec;
657 struct timeval time;
658};
659
660#define DISK_UTIL_MSEC (250)
661
662#ifndef min
663#define min(a, b) ((a) < (b) ? (a) : (b))
664#endif
665#ifndef max
666#define max(a, b) ((a) > (b) ? (a) : (b))
667#endif
668
669/*
670 * Log exports
671 */
672extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
673extern void write_iolog_put(struct thread_data *, struct io_u *);
674extern int __must_check init_iolog(struct thread_data *td);
675extern void log_io_piece(struct thread_data *, struct io_u *);
676extern void prune_io_piece_log(struct thread_data *);
677extern void write_iolog_close(struct thread_data *);
678
679/*
680 * Logging
681 */
682extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
683extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
684extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
685extern void show_run_stats(void);
686extern void init_disk_util(struct thread_data *);
687extern void update_rusage_stat(struct thread_data *);
688extern void update_io_ticks(void);
689extern void disk_util_timer_arm(void);
690extern void setup_log(struct io_log **);
691extern void finish_log(struct thread_data *, struct io_log *, const char *);
692extern void __finish_log(struct io_log *, const char *);
693extern struct io_log *agg_io_log[2];
694extern int write_bw_log;
695extern void add_agg_sample(unsigned long, enum fio_ddir);
696
697/*
698 * Time functions
699 */
700extern unsigned long utime_since(struct timeval *, struct timeval *);
701extern unsigned long utime_since_now(struct timeval *);
702extern unsigned long mtime_since(struct timeval *, struct timeval *);
703extern unsigned long mtime_since_now(struct timeval *);
704extern unsigned long time_since_now(struct timeval *);
705extern unsigned long mtime_since_genesis(void);
706extern void __usec_sleep(unsigned int);
707extern void usec_sleep(struct thread_data *, unsigned long);
708extern void rate_throttle(struct thread_data *, unsigned long, unsigned int);
709extern void fill_start_time(struct timeval *);
710extern void fio_gettime(struct timeval *, void *);
711extern void set_genesis_time(void);
712
713/*
714 * Init/option functions
715 */
716extern int __must_check parse_options(int, char **);
717extern int fio_option_parse(struct thread_data *, const char *);
718extern int fio_cmd_option_parse(struct thread_data *, const char *, char *);
719extern void fio_fill_default_options(struct thread_data *);
720extern int fio_show_option_help(const char *);
721extern void fio_options_dup_and_init(struct option *);
722extern void options_mem_dupe(struct thread_data *);
723extern void options_mem_free(struct thread_data *);
724#define FIO_GETOPT_JOB 0x89988998
725#define FIO_NR_OPTIONS 128
726
727/*
728 * File setup/shutdown
729 */
730extern void close_files(struct thread_data *);
731extern int __must_check setup_files(struct thread_data *);
732extern int __must_check open_files(struct thread_data *);
733extern int __must_check file_invalidate_cache(struct thread_data *, struct fio_file *);
734extern int __must_check generic_open_file(struct thread_data *, struct fio_file *);
735extern void generic_close_file(struct thread_data *, struct fio_file *);
736extern void add_file(struct thread_data *, const char *);
737extern void get_file(struct fio_file *);
738extern void put_file(struct thread_data *, struct fio_file *);
739extern int add_dir_files(struct thread_data *, const char *);
740extern int init_random_map(struct thread_data *);
741extern void dup_files(struct thread_data *, struct thread_data *);
742
743/*
744 * ETA/status stuff
745 */
746extern void print_thread_status(void);
747extern void print_status_init(int);
748
749/*
750 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
751 * will never back again. It may cycle between running/verififying/fsyncing.
752 * Once the thread reaches TD_EXITED, it is just waiting for the core to
753 * reap it.
754 */
755enum {
756 TD_NOT_CREATED = 0,
757 TD_CREATED,
758 TD_INITIALIZED,
759 TD_RUNNING,
760 TD_VERIFYING,
761 TD_FSYNCING,
762 TD_EXITED,
763 TD_REAPED,
764};
765
766/*
767 * Verify helpers
768 */
769extern void populate_verify_io_u(struct thread_data *, struct io_u *);
770extern int __must_check get_next_verify(struct thread_data *td, struct io_u *);
771extern int __must_check verify_io_u(struct thread_data *, struct io_u *);
772
773/*
774 * Memory helpers
775 */
776extern int __must_check fio_pin_memory(void);
777extern void fio_unpin_memory(void);
778extern int __must_check allocate_io_mem(struct thread_data *);
779extern void free_io_mem(struct thread_data *);
780
781/*
782 * io unit handling
783 */
784#define queue_full(td) list_empty(&(td)->io_u_freelist)
785extern struct io_u *__get_io_u(struct thread_data *);
786extern struct io_u *get_io_u(struct thread_data *);
787extern void put_io_u(struct thread_data *, struct io_u *);
788extern void requeue_io_u(struct thread_data *, struct io_u **);
789extern long __must_check io_u_sync_complete(struct thread_data *, struct io_u *);
790extern long __must_check io_u_queued_complete(struct thread_data *, int);
791extern void io_u_queued(struct thread_data *, struct io_u *);
792extern void io_u_log_error(struct thread_data *, struct io_u *);
793extern void io_u_init_timeout(void);
794extern void io_u_set_timeout(struct thread_data *);
795extern void io_u_mark_depth(struct thread_data *, struct io_u *);
796
797/*
798 * io engine entry points
799 */
800extern int __must_check td_io_init(struct thread_data *);
801extern int __must_check td_io_prep(struct thread_data *, struct io_u *);
802extern int __must_check td_io_queue(struct thread_data *, struct io_u *);
803extern int __must_check td_io_sync(struct thread_data *, struct fio_file *);
804extern int __must_check td_io_getevents(struct thread_data *, int, int, struct timespec *);
805extern int __must_check td_io_commit(struct thread_data *);
806extern int __must_check td_io_open_file(struct thread_data *, struct fio_file *);
807extern void td_io_close_file(struct thread_data *, struct fio_file *);
808
809/*
810 * If logging output to a file, stderr should go to both stderr and f_err
811 */
812#define log_err(args...) do { \
813 fprintf(f_err, ##args); \
814 if (f_err != stderr) \
815 fprintf(stderr, ##args); \
816 } while (0)
817
818#define log_info(args...) fprintf(f_out, ##args)
819
820FILE *get_f_out(void);
821FILE *get_f_err(void);
822
823struct ioengine_ops {
824 struct list_head list;
825 char name[16];
826 int version;
827 int flags;
828 int (*setup)(struct thread_data *);
829 int (*init)(struct thread_data *);
830 int (*prep)(struct thread_data *, struct io_u *);
831 int (*queue)(struct thread_data *, struct io_u *);
832 int (*commit)(struct thread_data *);
833 int (*getevents)(struct thread_data *, int, int, struct timespec *);
834 struct io_u *(*event)(struct thread_data *, int);
835 int (*cancel)(struct thread_data *, struct io_u *);
836 void (*cleanup)(struct thread_data *);
837 int (*open_file)(struct thread_data *, struct fio_file *);
838 void (*close_file)(struct thread_data *, struct fio_file *);
839 void *data;
840 void *dlhandle;
841};
842
843#define FIO_IOOPS_VERSION 7
844
845extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
846extern void register_ioengine(struct ioengine_ops *);
847extern void unregister_ioengine(struct ioengine_ops *);
848extern void close_ioengine(struct thread_data *);
849
850/*
851 * Mark unused variables passed to ops functions as unused, to silence gcc
852 */
853#define fio_unused __attribute((__unused__))
854#define fio_init __attribute__((constructor))
855#define fio_exit __attribute__((destructor))
856
857#define for_each_td(td, i) \
858 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
859#define for_each_file(td, f, i) \
860 for ((i) = 0, (f) = &(td)->files[0]; (i) < (td)->o.nr_files; (i)++, (f)++)
861
862#define fio_assert(td, cond) do { \
863 if (!(cond)) { \
864 int *__foo = NULL; \
865 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
866 (td)->runstate = TD_EXITED; \
867 (td)->error = EFAULT; \
868 *__foo = 0; \
869 } \
870} while (0)
871
872static inline void clear_error(struct thread_data *td)
873{
874 td->error = 0;
875 td->verror[0] = '\0';
876}
877
878#endif
fio - Flexible IO Tester