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blktrace support: support for looking up a device
[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/compiler.h"
17#include "list.h"
18#include "fifo.h"
19#include "rbtree.h"
20#include "md5.h"
21#include "crc32.h"
22#include "arch/arch.h"
23#include "os/os.h"
24#include "mutex.h"
25
26#ifdef FIO_HAVE_SYSLET
27#include "syslet.h"
28#endif
29
30#ifdef FIO_HAVE_GUASI
31#include <guasi.h>
32#endif
33
34enum fio_ddir {
35 DDIR_READ = 0,
36 DDIR_WRITE,
37 DDIR_SYNC,
38};
39
40enum td_ddir {
41 TD_DDIR_READ = 1 << 0,
42 TD_DDIR_WRITE = 1 << 1,
43 TD_DDIR_RAND = 1 << 2,
44 TD_DDIR_RW = TD_DDIR_READ | TD_DDIR_WRITE,
45 TD_DDIR_RANDREAD = TD_DDIR_READ | TD_DDIR_RAND,
46 TD_DDIR_RANDWRITE = TD_DDIR_WRITE | TD_DDIR_RAND,
47 TD_DDIR_RANDRW = TD_DDIR_RW | TD_DDIR_RAND,
48};
49
50/*
51 * Use for maintaining statistics
52 */
53struct io_stat {
54 unsigned long max_val;
55 unsigned long min_val;
56 unsigned long samples;
57
58 double mean;
59 double S;
60};
61
62/*
63 * A single data sample
64 */
65struct io_sample {
66 unsigned long time;
67 unsigned long val;
68 enum fio_ddir ddir;
69};
70
71/*
72 * Dynamically growing data sample log
73 */
74struct io_log {
75 unsigned long nr_samples;
76 unsigned long max_samples;
77 struct io_sample *log;
78};
79
80/*
81 * When logging io actions, this matches a single sent io_u
82 */
83struct io_piece {
84 union {
85 struct rb_node rb_node;
86 struct list_head list;
87 };
88 struct fio_file *file;
89 unsigned long long offset;
90 unsigned long len;
91 enum fio_ddir ddir;
92 unsigned long delay;
93};
94
95#ifdef FIO_HAVE_SYSLET
96struct syslet_req {
97 struct syslet_uatom atom; /* the atom to submit */
98 struct syslet_uatom *head; /* head of the sequence */
99 long ret; /* syscall return value */
100};
101#endif
102
103enum {
104 IO_U_F_FREE = 1 << 0,
105 IO_U_F_FLIGHT = 1 << 1,
106};
107
108struct thread_data;
109
110/*
111 * The io unit
112 */
113struct io_u {
114 union {
115#ifdef FIO_HAVE_LIBAIO
116 struct iocb iocb;
117#endif
118#ifdef FIO_HAVE_POSIXAIO
119 struct aiocb aiocb;
120#endif
121#ifdef FIO_HAVE_SGIO
122 struct sg_io_hdr hdr;
123#endif
124#ifdef FIO_HAVE_SYSLET
125 struct syslet_req req;
126#endif
127#ifdef FIO_HAVE_GUASI
128 guasi_req_t greq;
129#endif
130 };
131 struct timeval start_time;
132 struct timeval issue_time;
133
134 /*
135 * Allocated/set buffer and length
136 */
137 void *buf;
138 unsigned long buflen;
139 unsigned long long offset;
140 unsigned long long endpos;
141
142 /*
143 * IO engine state, may be different from above when we get
144 * partial transfers / residual data counts
145 */
146 void *xfer_buf;
147 unsigned long xfer_buflen;
148
149 unsigned int resid;
150 unsigned int error;
151
152 enum fio_ddir ddir;
153
154 /*
155 * io engine private data
156 */
157 union {
158 unsigned int index;
159 unsigned int seen;
160 };
161
162 unsigned int flags;
163
164 struct fio_file *file;
165
166 struct list_head list;
167
168 /*
169 * Callback for io completion
170 */
171 int (*end_io)(struct thread_data *, struct io_u *);
172};
173
174/*
175 * io_ops->queue() return values
176 */
177enum {
178 FIO_Q_COMPLETED = 0, /* completed sync */
179 FIO_Q_QUEUED = 1, /* queued, will complete async */
180 FIO_Q_BUSY = 2, /* no more room, call ->commit() */
181};
182
183#define FIO_HDR_MAGIC 0xf00baaef
184
185enum {
186 VERIFY_NONE = 0, /* no verification */
187 VERIFY_MD5, /* md5 sum data blocks */
188 VERIFY_CRC32, /* crc32 sum data blocks */
189 VERIFY_NULL, /* pretend to verify */
190};
191
192/*
193 * A header structure associated with each checksummed data block
194 */
195struct verify_header {
196 unsigned int fio_magic;
197 unsigned int len;
198 unsigned int verify_type;
199 union {
200 char md5_digest[MD5_HASH_WORDS * 4];
201 unsigned long crc32;
202 };
203};
204
205struct group_run_stats {
206 unsigned long long max_run[2], min_run[2];
207 unsigned long long max_bw[2], min_bw[2];
208 unsigned long long io_kb[2];
209 unsigned long long agg[2];
210};
211
212/*
213 * What type of allocation to use for io buffers
214 */
215enum fio_memtype {
216 MEM_MALLOC = 0, /* ordinary malloc */
217 MEM_SHM, /* use shared memory segments */
218 MEM_SHMHUGE, /* use shared memory segments with huge pages */
219 MEM_MMAP, /* use anonynomous mmap */
220 MEM_MMAPHUGE, /* memory mapped huge file */
221};
222
223/*
224 * The type of object we are working on
225 */
226enum fio_filetype {
227 FIO_TYPE_FILE = 1, /* plain file */
228 FIO_TYPE_BD, /* block device */
229 FIO_TYPE_CHAR, /* character device */
230 FIO_TYPE_PIPE, /* pipe */
231};
232
233enum fio_ioengine_flags {
234 FIO_SYNCIO = 1 << 0, /* io engine has synchronous ->queue */
235 FIO_RAWIO = 1 << 1, /* some sort of direct/raw io */
236 FIO_DISKLESSIO = 1 << 2, /* no disk involved */
237 FIO_NOEXTEND = 1 << 3, /* engine can't extend file */
238 FIO_NODISKUTIL = 1 << 4, /* diskutil can't handle filename */
239};
240
241enum fio_file_flags {
242 FIO_FILE_OPEN = 1 << 0, /* file is open */
243 FIO_FILE_CLOSING = 1 << 1, /* file being closed */
244 FIO_FILE_EXISTS = 1 << 2, /* file there */
245 FIO_FILE_EXTEND = 1 << 3, /* needs extend */
246 FIO_FILE_NOSORT = 1 << 4, /* don't sort verify blocks */
247 FIO_FILE_DONE = 1 << 5, /* io completed to this file */
248 FIO_SIZE_KNOWN = 1 << 6, /* size has been set */
249};
250
251/*
252 * Each thread_data structure has a number of files associated with it,
253 * this structure holds state information for a single file.
254 */
255struct fio_file {
256 enum fio_filetype filetype;
257
258 /*
259 * A file may not be a file descriptor, let the io engine decide
260 */
261 union {
262 unsigned long file_data;
263 int fd;
264 };
265
266 /*
267 * filename and possible memory mapping
268 */
269 char *file_name;
270 void *mmap;
271 unsigned int major, minor;
272
273 /*
274 * size of the file, offset into file, and io size from that offset
275 */
276 unsigned long long real_file_size;
277 unsigned long long file_offset;
278 unsigned long long io_size;
279
280 unsigned long long last_pos;
281 unsigned long long last_completed_pos;
282
283 /*
284 * block map for random io
285 */
286 unsigned long *file_map;
287 unsigned int num_maps;
288 unsigned int last_free_lookup;
289
290 int references;
291 enum fio_file_flags flags;
292};
293
294/*
295 * How many depth levels to log
296 */
297#define FIO_IO_U_MAP_NR 8
298#define FIO_IO_U_LAT_NR 12
299
300struct thread_stat {
301 char *name;
302 char *verror;
303 int error;
304 int groupid;
305 pid_t pid;
306 char *description;
307 int members;
308
309 struct io_log *slat_log;
310 struct io_log *clat_log;
311 struct io_log *bw_log;
312
313 /*
314 * bandwidth and latency stats
315 */
316 struct io_stat clat_stat[2]; /* completion latency */
317 struct io_stat slat_stat[2]; /* submission latency */
318 struct io_stat bw_stat[2]; /* bandwidth stats */
319
320 unsigned long long stat_io_bytes[2];
321 struct timeval stat_sample_time[2];
322
323 /*
324 * fio system usage accounting
325 */
326 struct rusage ru_start;
327 struct rusage ru_end;
328 unsigned long usr_time;
329 unsigned long sys_time;
330 unsigned long ctx;
331
332 /*
333 * IO depth and latency stats
334 */
335 unsigned int io_u_map[FIO_IO_U_MAP_NR];
336 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
337 unsigned long total_io_u[2];
338 unsigned long short_io_u[2];
339
340 unsigned long long io_bytes[2];
341 unsigned long runtime[2];
342 unsigned long total_run_time;
343};
344
345struct thread_options {
346 int pad;
347 char *description;
348 char *name;
349 char *directory;
350 char *filename;
351 char *opendir;
352 char *ioengine;
353 enum td_ddir td_ddir;
354 unsigned int ddir_nr;
355 unsigned int iodepth;
356 unsigned int iodepth_low;
357 unsigned int iodepth_batch;
358
359 unsigned long long size;
360 unsigned long long file_size_low;
361 unsigned long long file_size_high;
362 unsigned long long start_offset;
363
364 unsigned int bs[2];
365 unsigned int min_bs[2];
366 unsigned int max_bs[2];
367
368 unsigned int nr_files;
369 unsigned int open_files;
370
371 unsigned int odirect;
372 unsigned int invalidate_cache;
373 unsigned int create_serialize;
374 unsigned int create_fsync;
375 unsigned int end_fsync;
376 unsigned int sync_io;
377 unsigned int verify;
378 unsigned int verifysort;
379 unsigned int use_thread;
380 unsigned int unlink;
381 unsigned int do_disk_util;
382 unsigned int override_sync;
383 unsigned int rand_repeatable;
384 unsigned int write_lat_log;
385 unsigned int write_bw_log;
386 unsigned int norandommap;
387 unsigned int bs_unaligned;
388 unsigned int fsync_on_close;
389
390 unsigned int hugepage_size;
391 unsigned int rw_min_bs;
392 unsigned int thinktime;
393 unsigned int thinktime_spin;
394 unsigned int thinktime_blocks;
395 unsigned int fsync_blocks;
396 unsigned int start_delay;
397 unsigned long long timeout;
398 unsigned int overwrite;
399 unsigned int bw_avg_time;
400 unsigned int loops;
401 unsigned long long zone_size;
402 unsigned long long zone_skip;
403 enum fio_memtype mem_type;
404
405 unsigned int stonewall;
406 unsigned int new_group;
407 unsigned int numjobs;
408 os_cpu_mask_t cpumask;
409 unsigned int iolog;
410 unsigned int rwmixcycle;
411 unsigned int rwmix[2];
412 unsigned int nice;
413 unsigned int file_service_type;
414 unsigned int group_reporting;
415 unsigned int fadvise_hint;
416 unsigned int zero_buffers;
417 unsigned int time_based;
418
419 char *read_iolog_file;
420 char *write_iolog_file;
421
422 /*
423 * Pre-run and post-run shell
424 */
425 char *exec_prerun;
426 char *exec_postrun;
427
428 unsigned int rate;
429 unsigned int ratemin;
430 unsigned int ratecycle;
431 unsigned int rate_iops;
432 unsigned int rate_iops_min;
433
434 char *ioscheduler;
435
436 /*
437 * CPU "io" cycle burner
438 */
439 unsigned int cpuload;
440 unsigned int cpucycle;
441};
442
443#define FIO_VERROR_SIZE 128
444
445/*
446 * This describes a single thread/process executing a fio job.
447 */
448struct thread_data {
449 struct thread_options o;
450 char verror[FIO_VERROR_SIZE];
451 pthread_t thread;
452 int thread_number;
453 int groupid;
454 struct thread_stat ts;
455 struct fio_file *files;
456 unsigned int files_index;
457 unsigned int nr_open_files;
458 unsigned int nr_done_files;
459 unsigned int nr_normal_files;
460 union {
461 unsigned int next_file;
462 os_random_state_t next_file_state;
463 };
464 int error;
465 pid_t pid;
466 char *orig_buffer;
467 size_t orig_buffer_size;
468 volatile int terminate;
469 volatile int runstate;
470 unsigned int ioprio;
471 unsigned int last_was_sync;
472
473 char *mmapfile;
474 int mmapfd;
475
476 void *iolog_buf;
477 FILE *iolog_f;
478
479 char *sysfs_root;
480
481 os_random_state_t bsrange_state;
482 os_random_state_t verify_state;
483
484 int shm_id;
485
486 /*
487 * IO engine hooks, contains everything needed to submit an io_u
488 * to any of the available IO engines.
489 */
490 struct ioengine_ops *io_ops;
491
492 /*
493 * Current IO depth and list of free and busy io_u's.
494 */
495 unsigned int cur_depth;
496 struct list_head io_u_freelist;
497 struct list_head io_u_busylist;
498 struct list_head io_u_requeues;
499 unsigned int io_u_queued;
500
501 /*
502 * Rate state
503 */
504 unsigned long rate_usec_cycle;
505 long rate_pending_usleep;
506 unsigned long rate_bytes;
507 unsigned long rate_blocks;
508 struct timeval lastrate;
509
510 unsigned long long total_io_size;
511
512 unsigned long io_issues[2];
513 unsigned long long io_blocks[2];
514 unsigned long long io_bytes[2];
515 unsigned long long this_io_bytes[2];
516 unsigned long long zone_bytes;
517 struct fio_sem *mutex;
518
519 /*
520 * State for random io, a bitmap of blocks done vs not done
521 */
522 os_random_state_t random_state;
523
524 struct timeval start; /* start of this loop */
525 struct timeval epoch; /* time job was started */
526 struct timeval rw_end[2];
527 struct timeval last_issue;
528 unsigned int rw_end_set[2];
529
530 /*
531 * read/write mixed workload state
532 */
533 os_random_state_t rwmix_state;
534 unsigned long long rwmix_bytes;
535 struct timeval rwmix_switch;
536 enum fio_ddir rwmix_ddir;
537 unsigned int ddir_nr;
538
539 /*
540 * IO history logs for verification. We use a tree for sorting,
541 * if we are overwriting. Otherwise just use a fifo.
542 */
543 struct rb_root io_hist_tree;
544 struct list_head io_hist_list;
545
546 /*
547 * For IO replaying
548 */
549 struct list_head io_log_list;
550
551 /*
552 * timeout handling
553 */
554 struct timeval timeout_end;
555 struct itimerval timer;
556
557 /*
558 * for fileservice, how often to switch to a new file
559 */
560 unsigned int file_service_nr;
561 unsigned int file_service_left;
562 struct fio_file *file_service_file;
563
564 /*
565 * For generating file sizes
566 */
567 os_random_state_t file_size_state;
568};
569
570/*
571 * roundrobin available files, or choose one at random.
572 */
573enum {
574 FIO_FSERVICE_RANDOM = 1,
575 FIO_FSERVICE_RR = 2,
576};
577
578/*
579 * 30 second per-io_u timeout, with 5 second intervals to avoid resetting
580 * the timer on each queue operation.
581 */
582#define IO_U_TIMEOUT_INC 5
583#define IO_U_TIMEOUT 30
584
585#define __td_verror(td, err, msg, func) \
586 do { \
587 if ((td)->error) \
588 break; \
589 int e = (err); \
590 (td)->error = e; \
591 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
592 } while (0)
593
594
595#define td_verror(td, err, func) \
596 __td_verror((td), (err), strerror((err)), (func))
597#define td_vmsg(td, err, msg, func) \
598 __td_verror((td), (err), (msg), (func))
599
600extern int exitall_on_terminate;
601extern int thread_number;
602extern int nr_process, nr_thread;
603extern int shm_id;
604extern int groupid;
605extern int terse_output;
606extern FILE *f_out;
607extern FILE *f_err;
608extern int temp_stall_ts;
609extern unsigned long long mlock_size;
610extern unsigned long page_mask, page_size;
611
612extern struct thread_data *threads;
613
614#define td_read(td) ((td)->o.td_ddir & TD_DDIR_READ)
615#define td_write(td) ((td)->o.td_ddir & TD_DDIR_WRITE)
616#define td_rw(td) (((td)->o.td_ddir & TD_DDIR_RW) == TD_DDIR_RW)
617#define td_random(td) ((td)->o.td_ddir & TD_DDIR_RAND)
618
619#define BLOCKS_PER_MAP (8 * sizeof(long))
620#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->o.rw_min_bs))
621#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
622#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
623
624#define MAX_JOBS (1024)
625
626static inline int should_fsync(struct thread_data *td)
627{
628 if (td->last_was_sync)
629 return 0;
630 if (td->o.odirect)
631 return 0;
632 if (td_write(td) || td_rw(td) || td->o.override_sync)
633 return 1;
634
635 return 0;
636}
637
638/*
639 * Disk utils as read in /sys/block/<dev>/stat
640 */
641struct disk_util_stat {
642 unsigned ios[2];
643 unsigned merges[2];
644 unsigned long long sectors[2];
645 unsigned ticks[2];
646 unsigned io_ticks;
647 unsigned time_in_queue;
648};
649
650/*
651 * Per-device disk util management
652 */
653struct disk_util {
654 struct list_head list;
655
656 char *name;
657 char *sysfs_root;
658 char path[256];
659 int major, minor;
660
661 struct disk_util_stat dus;
662 struct disk_util_stat last_dus;
663
664 unsigned long msec;
665 struct timeval time;
666};
667
668#define DISK_UTIL_MSEC (250)
669
670/*
671 * Log exports
672 */
673extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
674extern void write_iolog_put(struct thread_data *, struct io_u *);
675extern int __must_check init_iolog(struct thread_data *td);
676extern void log_io_piece(struct thread_data *, struct io_u *);
677extern void prune_io_piece_log(struct thread_data *);
678extern void write_iolog_close(struct thread_data *);
679
680/*
681 * Logging
682 */
683extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
684extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
685extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
686extern void show_run_stats(void);
687extern void init_disk_util(struct thread_data *);
688extern void update_rusage_stat(struct thread_data *);
689extern void update_io_ticks(void);
690extern void disk_util_timer_arm(void);
691extern void setup_log(struct io_log **);
692extern void finish_log(struct thread_data *, struct io_log *, const char *);
693extern void __finish_log(struct io_log *, const char *);
694extern struct io_log *agg_io_log[2];
695extern int write_bw_log;
696extern void add_agg_sample(unsigned long, enum fio_ddir);
697
698/*
699 * Time functions
700 */
701extern unsigned long utime_since(struct timeval *, struct timeval *);
702extern unsigned long utime_since_now(struct timeval *);
703extern unsigned long mtime_since(struct timeval *, struct timeval *);
704extern unsigned long mtime_since_now(struct timeval *);
705extern unsigned long time_since_now(struct timeval *);
706extern unsigned long mtime_since_genesis(void);
707extern void __usec_sleep(unsigned int);
708extern void usec_sleep(struct thread_data *, unsigned long);
709extern void rate_throttle(struct thread_data *, unsigned long, unsigned int);
710extern void fill_start_time(struct timeval *);
711extern void fio_gettime(struct timeval *, void *);
712extern void set_genesis_time(void);
713
714/*
715 * Init/option functions
716 */
717extern int __must_check parse_options(int, char **);
718extern int fio_option_parse(struct thread_data *, const char *);
719extern int fio_cmd_option_parse(struct thread_data *, const char *, char *);
720extern void fio_fill_default_options(struct thread_data *);
721extern int fio_show_option_help(const char *);
722extern void fio_options_dup_and_init(struct option *);
723extern void options_mem_dupe(struct thread_data *);
724extern void options_mem_free(struct thread_data *);
725#define FIO_GETOPT_JOB 0x89988998
726#define FIO_NR_OPTIONS 128
727
728/*
729 * File setup/shutdown
730 */
731extern void close_files(struct thread_data *);
732extern int __must_check setup_files(struct thread_data *);
733extern int __must_check open_files(struct thread_data *);
734extern int __must_check file_invalidate_cache(struct thread_data *, struct fio_file *);
735extern int __must_check generic_open_file(struct thread_data *, struct fio_file *);
736extern void generic_close_file(struct thread_data *, struct fio_file *);
737extern void add_file(struct thread_data *, const char *);
738extern void get_file(struct fio_file *);
739extern void put_file(struct thread_data *, struct fio_file *);
740extern int add_dir_files(struct thread_data *, const char *);
741extern int init_random_map(struct thread_data *);
742extern void dup_files(struct thread_data *, struct thread_data *);
743
744/*
745 * ETA/status stuff
746 */
747extern void print_thread_status(void);
748extern void print_status_init(int);
749
750/*
751 * disk util stuff
752 */
753#ifdef FIO_HAVE_DISK_UTIL
754extern void show_disk_util(void);
755extern void disk_util_timer_arm(void);
756extern void init_disk_util(struct thread_data *);
757extern void update_io_ticks(void);
758#else
759#define show_disk_util()
760#define disk_util_timer_arm()
761#define init_disk_util(td)
762#define update_io_ticks()
763#endif
764
765/*
766 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
767 * will never back again. It may cycle between running/verififying/fsyncing.
768 * Once the thread reaches TD_EXITED, it is just waiting for the core to
769 * reap it.
770 */
771enum {
772 TD_NOT_CREATED = 0,
773 TD_CREATED,
774 TD_INITIALIZED,
775 TD_RUNNING,
776 TD_VERIFYING,
777 TD_FSYNCING,
778 TD_EXITED,
779 TD_REAPED,
780};
781
782/*
783 * Verify helpers
784 */
785extern void populate_verify_io_u(struct thread_data *, struct io_u *);
786extern int __must_check get_next_verify(struct thread_data *td, struct io_u *);
787extern int __must_check verify_io_u(struct thread_data *, struct io_u *);
788
789/*
790 * Memory helpers
791 */
792extern int __must_check fio_pin_memory(void);
793extern void fio_unpin_memory(void);
794extern int __must_check allocate_io_mem(struct thread_data *);
795extern void free_io_mem(struct thread_data *);
796
797/*
798 * io unit handling
799 */
800#define queue_full(td) list_empty(&(td)->io_u_freelist)
801extern struct io_u *__get_io_u(struct thread_data *);
802extern struct io_u *get_io_u(struct thread_data *);
803extern void put_io_u(struct thread_data *, struct io_u *);
804extern void requeue_io_u(struct thread_data *, struct io_u **);
805extern long __must_check io_u_sync_complete(struct thread_data *, struct io_u *);
806extern long __must_check io_u_queued_complete(struct thread_data *, int);
807extern void io_u_queued(struct thread_data *, struct io_u *);
808extern void io_u_log_error(struct thread_data *, struct io_u *);
809extern void io_u_init_timeout(void);
810extern void io_u_set_timeout(struct thread_data *);
811extern void io_u_mark_depth(struct thread_data *, struct io_u *);
812
813/*
814 * io engine entry points
815 */
816extern int __must_check td_io_init(struct thread_data *);
817extern int __must_check td_io_prep(struct thread_data *, struct io_u *);
818extern int __must_check td_io_queue(struct thread_data *, struct io_u *);
819extern int __must_check td_io_sync(struct thread_data *, struct fio_file *);
820extern int __must_check td_io_getevents(struct thread_data *, int, int, struct timespec *);
821extern int __must_check td_io_commit(struct thread_data *);
822extern int __must_check td_io_open_file(struct thread_data *, struct fio_file *);
823extern void td_io_close_file(struct thread_data *, struct fio_file *);
824
825/*
826 * blktrace support
827 */
828extern int is_blktrace(const char *);
829extern int load_blktrace(struct thread_data *, const char *);
830
831/*
832 * If logging output to a file, stderr should go to both stderr and f_err
833 */
834#define log_err(args...) do { \
835 fprintf(f_err, ##args); \
836 if (f_err != stderr) \
837 fprintf(stderr, ##args); \
838 } while (0)
839
840#define log_info(args...) fprintf(f_out, ##args)
841
842FILE *get_f_out(void);
843FILE *get_f_err(void);
844
845struct ioengine_ops {
846 struct list_head list;
847 char name[16];
848 int version;
849 int flags;
850 int (*setup)(struct thread_data *);
851 int (*init)(struct thread_data *);
852 int (*prep)(struct thread_data *, struct io_u *);
853 int (*queue)(struct thread_data *, struct io_u *);
854 int (*commit)(struct thread_data *);
855 int (*getevents)(struct thread_data *, int, int, struct timespec *);
856 struct io_u *(*event)(struct thread_data *, int);
857 int (*cancel)(struct thread_data *, struct io_u *);
858 void (*cleanup)(struct thread_data *);
859 int (*open_file)(struct thread_data *, struct fio_file *);
860 void (*close_file)(struct thread_data *, struct fio_file *);
861 void *data;
862 void *dlhandle;
863};
864
865#define FIO_IOOPS_VERSION 7
866
867extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
868extern void register_ioengine(struct ioengine_ops *);
869extern void unregister_ioengine(struct ioengine_ops *);
870extern void close_ioengine(struct thread_data *);
871
872/*
873 * Mark unused variables passed to ops functions as unused, to silence gcc
874 */
875#define fio_unused __attribute((__unused__))
876#define fio_init __attribute__((constructor))
877#define fio_exit __attribute__((destructor))
878
879#define for_each_td(td, i) \
880 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
881#define for_each_file(td, f, i) \
882 for ((i) = 0, (f) = &(td)->files[0]; (i) < (td)->o.nr_files; (i)++, (f)++)
883
884#define fio_assert(td, cond) do { \
885 if (!(cond)) { \
886 int *__foo = NULL; \
887 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
888 (td)->runstate = TD_EXITED; \
889 (td)->error = EFAULT; \
890 *__foo = 0; \
891 } \
892} while (0)
893
894static inline void clear_error(struct thread_data *td)
895{
896 td->error = 0;
897 td->verror[0] = '\0';
898}
899
900#endif
fio - Flexible IO Tester