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Better check for not doing a file twice
[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, /* file there */
241 FIO_FILE_EXTEND = 1 << 4, /* needs extend */
242 FIO_FILE_NOSORT = 1 << 5, /* don't sort verify blocks */
243 FIO_FILE_DONE = 1 << 6, /* io completed to this file */
244};
245
246/*
247 * Each thread_data structure has a number of files associated with it,
248 * this structure holds state information for a single file.
249 */
250struct fio_file {
251 enum fio_filetype filetype;
252
253 /*
254 * A file may not be a file descriptor, let the io engine decide
255 */
256 union {
257 unsigned long file_data;
258 int fd;
259 };
260
261 /*
262 * filename and possible memory mapping
263 */
264 char *file_name;
265 void *mmap;
266
267 /*
268 * size of the file, offset into file, and io size from that offset
269 */
270 unsigned long long real_file_size;
271 unsigned long long file_offset;
272 unsigned long long io_size;
273
274 unsigned long long last_pos;
275 unsigned long long last_completed_pos;
276
277 /*
278 * block map for random io
279 */
280 unsigned long *file_map;
281 unsigned int num_maps;
282 unsigned int last_free_lookup;
283
284 int references;
285 enum fio_file_flags flags;
286};
287
288/*
289 * How many depth levels to log
290 */
291#define FIO_IO_U_MAP_NR 8
292#define FIO_IO_U_LAT_NR 12
293
294struct thread_stat {
295 char *name;
296 char *verror;
297 int error;
298 int groupid;
299 pid_t pid;
300 char *description;
301 int members;
302
303 struct io_log *slat_log;
304 struct io_log *clat_log;
305 struct io_log *bw_log;
306
307 /*
308 * bandwidth and latency stats
309 */
310 struct io_stat clat_stat[2]; /* completion latency */
311 struct io_stat slat_stat[2]; /* submission latency */
312 struct io_stat bw_stat[2]; /* bandwidth stats */
313
314 unsigned long long stat_io_bytes[2];
315 struct timeval stat_sample_time[2];
316
317 /*
318 * fio system usage accounting
319 */
320 struct rusage ru_start;
321 struct rusage ru_end;
322 unsigned long usr_time;
323 unsigned long sys_time;
324 unsigned long ctx;
325
326 /*
327 * IO depth and latency stats
328 */
329 unsigned int io_u_map[FIO_IO_U_MAP_NR];
330 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
331 unsigned long total_io_u[2];
332
333 unsigned long long io_bytes[2];
334 unsigned long runtime[2];
335 unsigned long total_run_time;
336};
337
338struct thread_options {
339 int pad;
340 char *description;
341 char *name;
342 char *directory;
343 char *filename;
344 char *opendir;
345 char *ioengine;
346 enum td_ddir td_ddir;
347 unsigned int ddir_nr;
348 unsigned int iodepth;
349 unsigned int iodepth_low;
350 unsigned int iodepth_batch;
351
352 unsigned long long size;
353 unsigned long long file_size_low;
354 unsigned long long file_size_high;
355 unsigned long long start_offset;
356
357 unsigned int bs[2];
358 unsigned int min_bs[2];
359 unsigned int max_bs[2];
360
361 unsigned int nr_files;
362 unsigned int open_files;
363
364 unsigned int odirect;
365 unsigned int invalidate_cache;
366 unsigned int create_serialize;
367 unsigned int create_fsync;
368 unsigned int end_fsync;
369 unsigned int sync_io;
370 unsigned int verify;
371 unsigned int verifysort;
372 unsigned int use_thread;
373 unsigned int unlink;
374 unsigned int do_disk_util;
375 unsigned int override_sync;
376 unsigned int rand_repeatable;
377 unsigned int write_lat_log;
378 unsigned int write_bw_log;
379 unsigned int norandommap;
380 unsigned int bs_unaligned;
381 unsigned int fsync_on_close;
382
383 unsigned int hugepage_size;
384 unsigned int rw_min_bs;
385 unsigned int thinktime;
386 unsigned int thinktime_spin;
387 unsigned int thinktime_blocks;
388 unsigned int fsync_blocks;
389 unsigned int start_delay;
390 unsigned long timeout;
391 unsigned int overwrite;
392 unsigned int bw_avg_time;
393 unsigned int loops;
394 unsigned long long zone_size;
395 unsigned long long zone_skip;
396 enum fio_memtype mem_type;
397
398 unsigned int stonewall;
399 unsigned int new_group;
400 unsigned int numjobs;
401 os_cpu_mask_t cpumask;
402 unsigned int iolog;
403 unsigned int read_iolog;
404 unsigned int rwmixcycle;
405 unsigned int rwmix[2];
406 unsigned int nice;
407 unsigned int file_service_type;
408 unsigned int group_reporting;
409 unsigned int fadvise_hint;
410
411 char *read_iolog_file;
412 char *write_iolog_file;
413
414 /*
415 * Pre-run and post-run shell
416 */
417 char *exec_prerun;
418 char *exec_postrun;
419
420 unsigned int rate;
421 unsigned int ratemin;
422 unsigned int ratecycle;
423 unsigned int rate_iops;
424 unsigned int rate_iops_min;
425
426 char *ioscheduler;
427
428 /*
429 * CPU "io" cycle burner
430 */
431 unsigned int cpuload;
432 unsigned int cpucycle;
433};
434
435#define FIO_VERROR_SIZE 128
436
437/*
438 * This describes a single thread/process executing a fio job.
439 */
440struct thread_data {
441 struct thread_options o;
442 char verror[FIO_VERROR_SIZE];
443 pthread_t thread;
444 int thread_number;
445 int groupid;
446 struct thread_stat ts;
447 struct fio_file *files;
448 unsigned int files_index;
449 unsigned int nr_open_files;
450 unsigned int nr_normal_files;
451 union {
452 unsigned int next_file;
453 os_random_state_t next_file_state;
454 };
455 int error;
456 pid_t pid;
457 char *orig_buffer;
458 size_t orig_buffer_size;
459 volatile int terminate;
460 volatile int runstate;
461 unsigned int ioprio;
462 unsigned int last_was_sync;
463
464 char *mmapfile;
465 int mmapfd;
466
467 void *iolog_buf;
468 FILE *iolog_f;
469
470 char *sysfs_root;
471
472 os_random_state_t bsrange_state;
473 os_random_state_t verify_state;
474
475 int shm_id;
476
477 /*
478 * IO engine hooks, contains everything needed to submit an io_u
479 * to any of the available IO engines.
480 */
481 struct ioengine_ops *io_ops;
482
483 /*
484 * Current IO depth and list of free and busy io_u's.
485 */
486 unsigned int cur_depth;
487 struct list_head io_u_freelist;
488 struct list_head io_u_busylist;
489 struct list_head io_u_requeues;
490 unsigned int io_u_queued;
491
492 /*
493 * Rate state
494 */
495 unsigned long rate_usec_cycle;
496 long rate_pending_usleep;
497 unsigned long rate_bytes;
498 unsigned long rate_blocks;
499 struct timeval lastrate;
500
501 unsigned long long total_io_size;
502
503 unsigned long io_issues[2];
504 unsigned long long io_blocks[2];
505 unsigned long long io_bytes[2];
506 unsigned long long this_io_bytes[2];
507 unsigned long long zone_bytes;
508 struct fio_sem *mutex;
509
510 /*
511 * State for random io, a bitmap of blocks done vs not done
512 */
513 os_random_state_t random_state;
514
515 struct timeval start; /* start of this loop */
516 struct timeval epoch; /* time job was started */
517 struct timeval rw_end[2];
518 unsigned int rw_end_set[2];
519
520 /*
521 * read/write mixed workload state
522 */
523 os_random_state_t rwmix_state;
524 unsigned long long rwmix_bytes;
525 struct timeval rwmix_switch;
526 enum fio_ddir rwmix_ddir;
527 unsigned int ddir_nr;
528
529 /*
530 * IO history logs for verification. We use a tree for sorting,
531 * if we are overwriting. Otherwise just use a fifo.
532 */
533 struct rb_root io_hist_tree;
534 struct list_head io_hist_list;
535
536 /*
537 * For IO replaying
538 */
539 struct list_head io_log_list;
540
541 /*
542 * timeout handling
543 */
544 struct timeval timeout_end;
545 struct itimerval timer;
546
547 /*
548 * for fileservice, how often to switch to a new file
549 */
550 unsigned int file_service_nr;
551 unsigned int file_service_left;
552 struct fio_file *file_service_file;
553
554 /*
555 * For generating file sizes
556 */
557 os_random_state_t file_size_state;
558};
559
560/*
561 * roundrobin available files, or choose one at random.
562 */
563enum {
564 FIO_FSERVICE_RANDOM = 1,
565 FIO_FSERVICE_RR = 2,
566};
567
568/*
569 * 30 second per-io_u timeout, with 5 second intervals to avoid resetting
570 * the timer on each queue operation.
571 */
572#define IO_U_TIMEOUT_INC 5
573#define IO_U_TIMEOUT 30
574
575#define __td_verror(td, err, msg, func) \
576 do { \
577 if ((td)->error) \
578 break; \
579 int e = (err); \
580 (td)->error = e; \
581 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
582 } while (0)
583
584
585#define td_verror(td, err, func) \
586 __td_verror((td), (err), strerror((err)), (func))
587#define td_vmsg(td, err, msg, func) \
588 __td_verror((td), (err), (msg), (func))
589
590extern int exitall_on_terminate;
591extern int thread_number;
592extern int nr_process, nr_thread;
593extern int shm_id;
594extern int groupid;
595extern int terse_output;
596extern FILE *f_out;
597extern FILE *f_err;
598extern int temp_stall_ts;
599extern unsigned long long mlock_size;
600extern unsigned long page_mask, page_size;
601
602extern struct thread_data *threads;
603
604#define td_read(td) ((td)->o.td_ddir & TD_DDIR_READ)
605#define td_write(td) ((td)->o.td_ddir & TD_DDIR_WRITE)
606#define td_rw(td) (((td)->o.td_ddir & TD_DDIR_RW) == TD_DDIR_RW)
607#define td_random(td) ((td)->o.td_ddir & TD_DDIR_RAND)
608
609#define BLOCKS_PER_MAP (8 * sizeof(long))
610#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->o.rw_min_bs))
611#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
612#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
613
614#define MAX_JOBS (1024)
615
616static inline int should_fsync(struct thread_data *td)
617{
618 if (td->last_was_sync)
619 return 0;
620 if (td->o.odirect)
621 return 0;
622 if (td_write(td) || td_rw(td) || td->o.override_sync)
623 return 1;
624
625 return 0;
626}
627
628/*
629 * Disk utils as read in /sys/block/<dev>/stat
630 */
631struct disk_util_stat {
632 unsigned ios[2];
633 unsigned merges[2];
634 unsigned long long sectors[2];
635 unsigned ticks[2];
636 unsigned io_ticks;
637 unsigned time_in_queue;
638};
639
640/*
641 * Per-device disk util management
642 */
643struct disk_util {
644 struct list_head list;
645
646 char *name;
647 char path[256];
648 dev_t dev;
649
650 struct disk_util_stat dus;
651 struct disk_util_stat last_dus;
652
653 unsigned long msec;
654 struct timeval time;
655};
656
657#define DISK_UTIL_MSEC (250)
658
659#ifndef min
660#define min(a, b) ((a) < (b) ? (a) : (b))
661#endif
662#ifndef max
663#define max(a, b) ((a) > (b) ? (a) : (b))
664#endif
665
666/*
667 * Log exports
668 */
669extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
670extern void write_iolog_put(struct thread_data *, struct io_u *);
671extern int __must_check init_iolog(struct thread_data *td);
672extern void log_io_piece(struct thread_data *, struct io_u *);
673extern void prune_io_piece_log(struct thread_data *);
674extern void write_iolog_close(struct thread_data *);
675
676/*
677 * Logging
678 */
679extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
680extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
681extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
682extern void show_run_stats(void);
683extern void init_disk_util(struct thread_data *);
684extern void update_rusage_stat(struct thread_data *);
685extern void update_io_ticks(void);
686extern void disk_util_timer_arm(void);
687extern void setup_log(struct io_log **);
688extern void finish_log(struct thread_data *, struct io_log *, const char *);
689extern void __finish_log(struct io_log *, const char *);
690extern struct io_log *agg_io_log[2];
691extern int write_bw_log;
692extern void add_agg_sample(unsigned long, enum fio_ddir);
693
694/*
695 * Time functions
696 */
697extern unsigned long utime_since(struct timeval *, struct timeval *);
698extern unsigned long utime_since_now(struct timeval *);
699extern unsigned long mtime_since(struct timeval *, struct timeval *);
700extern unsigned long mtime_since_now(struct timeval *);
701extern unsigned long time_since_now(struct timeval *);
702extern unsigned long mtime_since_genesis(void);
703extern void __usec_sleep(unsigned int);
704extern void usec_sleep(struct thread_data *, unsigned long);
705extern void rate_throttle(struct thread_data *, unsigned long, unsigned int);
706extern void fill_start_time(struct timeval *);
707extern void fio_gettime(struct timeval *, void *);
708extern void set_genesis_time(void);
709
710/*
711 * Init/option functions
712 */
713extern int __must_check parse_options(int, char **);
714extern int fio_option_parse(struct thread_data *, const char *);
715extern int fio_cmd_option_parse(struct thread_data *, const char *, char *);
716extern void fio_fill_default_options(struct thread_data *);
717extern int fio_show_option_help(const char *);
718extern void fio_options_dup_and_init(struct option *);
719extern void options_mem_dupe(struct thread_data *);
720extern void options_mem_free(struct thread_data *);
721#define FIO_GETOPT_JOB 0x89988998
722#define FIO_NR_OPTIONS 128
723
724/*
725 * File setup/shutdown
726 */
727extern void close_files(struct thread_data *);
728extern int __must_check setup_files(struct thread_data *);
729extern int __must_check open_files(struct thread_data *);
730extern int __must_check file_invalidate_cache(struct thread_data *, struct fio_file *);
731extern int __must_check generic_open_file(struct thread_data *, struct fio_file *);
732extern void generic_close_file(struct thread_data *, struct fio_file *);
733extern void add_file(struct thread_data *, const char *);
734extern void get_file(struct fio_file *);
735extern void put_file(struct thread_data *, struct fio_file *);
736extern int add_dir_files(struct thread_data *, const char *);
737extern int init_random_map(struct thread_data *);
738extern void dup_files(struct thread_data *, struct thread_data *);
739
740/*
741 * ETA/status stuff
742 */
743extern void print_thread_status(void);
744extern void print_status_init(int);
745
746/*
747 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
748 * will never back again. It may cycle between running/verififying/fsyncing.
749 * Once the thread reaches TD_EXITED, it is just waiting for the core to
750 * reap it.
751 */
752enum {
753 TD_NOT_CREATED = 0,
754 TD_CREATED,
755 TD_INITIALIZED,
756 TD_RUNNING,
757 TD_VERIFYING,
758 TD_FSYNCING,
759 TD_EXITED,
760 TD_REAPED,
761};
762
763/*
764 * Verify helpers
765 */
766extern void populate_verify_io_u(struct thread_data *, struct io_u *);
767extern int __must_check get_next_verify(struct thread_data *td, struct io_u *);
768extern int __must_check verify_io_u(struct thread_data *, struct io_u *);
769
770/*
771 * Memory helpers
772 */
773extern int __must_check fio_pin_memory(void);
774extern void fio_unpin_memory(void);
775extern int __must_check allocate_io_mem(struct thread_data *);
776extern void free_io_mem(struct thread_data *);
777
778/*
779 * io unit handling
780 */
781#define queue_full(td) list_empty(&(td)->io_u_freelist)
782extern struct io_u *__get_io_u(struct thread_data *);
783extern struct io_u *get_io_u(struct thread_data *);
784extern void put_io_u(struct thread_data *, struct io_u *);
785extern void requeue_io_u(struct thread_data *, struct io_u **);
786extern long __must_check io_u_sync_complete(struct thread_data *, struct io_u *);
787extern long __must_check io_u_queued_complete(struct thread_data *, int);
788extern void io_u_queued(struct thread_data *, struct io_u *);
789extern void io_u_log_error(struct thread_data *, struct io_u *);
790extern void io_u_init_timeout(void);
791extern void io_u_set_timeout(struct thread_data *);
792extern void io_u_mark_depth(struct thread_data *, struct io_u *);
793
794/*
795 * io engine entry points
796 */
797extern int __must_check td_io_init(struct thread_data *);
798extern int __must_check td_io_prep(struct thread_data *, struct io_u *);
799extern int __must_check td_io_queue(struct thread_data *, struct io_u *);
800extern int __must_check td_io_sync(struct thread_data *, struct fio_file *);
801extern int __must_check td_io_getevents(struct thread_data *, int, int, struct timespec *);
802extern int __must_check td_io_commit(struct thread_data *);
803extern int __must_check td_io_open_file(struct thread_data *, struct fio_file *);
804extern void td_io_close_file(struct thread_data *, struct fio_file *);
805
806/*
807 * If logging output to a file, stderr should go to both stderr and f_err
808 */
809#define log_err(args...) do { \
810 fprintf(f_err, ##args); \
811 if (f_err != stderr) \
812 fprintf(stderr, ##args); \
813 } while (0)
814
815#define log_info(args...) fprintf(f_out, ##args)
816
817FILE *get_f_out(void);
818FILE *get_f_err(void);
819
820struct ioengine_ops {
821 struct list_head list;
822 char name[16];
823 int version;
824 int flags;
825 int (*setup)(struct thread_data *);
826 int (*init)(struct thread_data *);
827 int (*prep)(struct thread_data *, struct io_u *);
828 int (*queue)(struct thread_data *, struct io_u *);
829 int (*commit)(struct thread_data *);
830 int (*getevents)(struct thread_data *, int, int, struct timespec *);
831 struct io_u *(*event)(struct thread_data *, int);
832 int (*cancel)(struct thread_data *, struct io_u *);
833 void (*cleanup)(struct thread_data *);
834 int (*open_file)(struct thread_data *, struct fio_file *);
835 void (*close_file)(struct thread_data *, struct fio_file *);
836 void *data;
837 void *dlhandle;
838};
839
840#define FIO_IOOPS_VERSION 7
841
842extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
843extern void register_ioengine(struct ioengine_ops *);
844extern void unregister_ioengine(struct ioengine_ops *);
845extern void close_ioengine(struct thread_data *);
846
847/*
848 * Mark unused variables passed to ops functions as unused, to silence gcc
849 */
850#define fio_unused __attribute((__unused__))
851#define fio_init __attribute__((constructor))
852#define fio_exit __attribute__((destructor))
853
854#define for_each_td(td, i) \
855 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
856#define for_each_file(td, f, i) \
857 for ((i) = 0, (f) = &(td)->files[0]; (i) < (td)->o.nr_files; (i)++, (f)++)
858
859#define fio_assert(td, cond) do { \
860 if (!(cond)) { \
861 int *__foo = NULL; \
862 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
863 (td)->runstate = TD_EXITED; \
864 (td)->error = EFAULT; \
865 *__foo = 0; \
866 } \
867} while (0)
868
869static inline void clear_error(struct thread_data *td)
870{
871 td->error = 0;
872 td->verror[0] = '\0';
873}
874
875#endif
fio - Flexible IO Tester