libaio engine: proper return value checking
[fio.git] / fio.h
CommitLineData
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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>
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9#include <errno.h>
10#include <stdlib.h>
11#include <stdio.h>
6d6f031f 12#include <unistd.h>
34cfcdaf 13#include <string.h>
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14
15#include "list.h"
16#include "md5.h"
17#include "crc32.h"
18#include "arch.h"
19#include "os.h"
20
b6959b55 21#ifdef FIO_HAVE_SYSLET
a4f4fdd7 22#include "syslet.h"
b6959b55 23#endif
a4f4fdd7 24
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25enum fio_ddir {
26 DDIR_READ = 0,
27 DDIR_WRITE,
28 DDIR_SYNC,
29};
30
413dd459 31enum td_ddir {
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32 TD_DDIR_READ = 1 << 0,
33 TD_DDIR_WRITE = 1 << 1,
34 TD_DDIR_RAND = 1 << 2,
35 TD_DDIR_RW = TD_DDIR_READ | TD_DDIR_WRITE,
36 TD_DDIR_RANDREAD = TD_DDIR_READ | TD_DDIR_RAND,
37 TD_DDIR_RANDWRITE = TD_DDIR_WRITE | TD_DDIR_READ,
38 TD_DDIR_RANDRW = TD_DDIR_RW | TD_DDIR_RAND,
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39};
40
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41/*
42 * Use for maintaining statistics
43 */
ebac4655 44struct io_stat {
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45 unsigned long max_val;
46 unsigned long min_val;
47 unsigned long samples;
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48
49 double mean;
50 double S;
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51};
52
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53/*
54 * A single data sample
55 */
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56struct io_sample {
57 unsigned long time;
58 unsigned long val;
1e97cce9 59 enum fio_ddir ddir;
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60};
61
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62/*
63 * Dynamically growing data sample log
64 */
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65struct io_log {
66 unsigned long nr_samples;
67 unsigned long max_samples;
68 struct io_sample *log;
69};
70
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71/*
72 * When logging io actions, this matches a single sent io_u
73 */
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74struct io_piece {
75 struct list_head list;
53cdc686 76 struct fio_file *file;
ebac4655 77 unsigned long long offset;
a4f4fdd7 78 unsigned long len;
1e97cce9 79 enum fio_ddir ddir;
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80};
81
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82#ifdef FIO_HAVE_SYSLET
83struct syslet_req {
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84 struct syslet_uatom atom; /* the atom to submit */
85 struct syslet_uatom *head; /* head of the sequence */
86 long ret; /* syscall return value */
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87};
88#endif
89
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90enum {
91 IO_U_F_FREE = 1 << 0,
92 IO_U_F_FLIGHT = 1 << 1,
93};
94
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95/*
96 * The io unit
97 */
98struct io_u {
99 union {
100#ifdef FIO_HAVE_LIBAIO
101 struct iocb iocb;
102#endif
103#ifdef FIO_HAVE_POSIXAIO
104 struct aiocb aiocb;
105#endif
106#ifdef FIO_HAVE_SGIO
107 struct sg_io_hdr hdr;
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108#endif
109#ifdef FIO_HAVE_SYSLET
a2e1b08a 110 struct syslet_req req;
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111#endif
112 };
113 struct timeval start_time;
114 struct timeval issue_time;
115
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116 /*
117 * Allocated/set buffer and length
118 */
6b9cea23 119 void *buf;
a4f4fdd7 120 unsigned long buflen;
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121 unsigned long long offset;
122
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123 /*
124 * IO engine state, may be different from above when we get
125 * partial transfers / residual data counts
126 */
cec6b55d 127 void *xfer_buf;
a4f4fdd7 128 unsigned long xfer_buflen;
cec6b55d 129
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130 unsigned int resid;
131 unsigned int error;
132
1e97cce9 133 enum fio_ddir ddir;
ebac4655 134
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135 /*
136 * io engine private data
137 */
138 union {
139 unsigned int index;
140 unsigned int seen;
141 };
142
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143 unsigned int flags;
144
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145 struct fio_file *file;
146
ebac4655 147 struct list_head list;
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148
149 /*
150 * Callback for io completion
151 */
152 int (*end_io)(struct io_u *);
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153};
154
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155/*
156 * io_ops->queue() return values
157 */
158enum {
159 FIO_Q_COMPLETED = 0, /* completed sync */
160 FIO_Q_QUEUED = 1, /* queued, will complete async */
755200a3 161 FIO_Q_BUSY = 2, /* no more room, call ->commit() */
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162};
163
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164#define FIO_HDR_MAGIC 0xf00baaef
165
166enum {
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167 VERIFY_NONE = 0, /* no verification */
168 VERIFY_MD5, /* md5 sum data blocks */
169 VERIFY_CRC32, /* crc32 sum data blocks */
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170};
171
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172/*
173 * A header structure associated with each checksummed data block
174 */
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175struct verify_header {
176 unsigned int fio_magic;
177 unsigned int len;
178 unsigned int verify_type;
179 union {
180 char md5_digest[MD5_HASH_WORDS * 4];
181 unsigned long crc32;
182 };
183};
184
185struct group_run_stats {
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186 unsigned long long max_run[2], min_run[2];
187 unsigned long long max_bw[2], min_bw[2];
e9b2a3fa 188 unsigned long long io_kb[2];
9104f874 189 unsigned long long agg[2];
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190};
191
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192/*
193 * What type of allocation to use for io buffers
194 */
195enum fio_memtype {
196 MEM_MALLOC = 0, /* ordinary malloc */
197 MEM_SHM, /* use shared memory segments */
74b025b0 198 MEM_SHMHUGE, /* use shared memory segments with huge pages */
e9c047a0 199 MEM_MMAP, /* use anonynomous mmap */
d0bdaf49 200 MEM_MMAPHUGE, /* memory mapped huge file */
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201};
202
203/*
204 * The type of object we are working on
205 */
206enum fio_filetype {
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207 FIO_TYPE_FILE = 1, /* plain file */
208 FIO_TYPE_BD, /* block device */
209 FIO_TYPE_CHAR, /* character device */
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210};
211
2866c82d 212enum fio_ioengine_flags {
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213 FIO_SYNCIO = 1 << 0, /* io engine has synchronous ->queue */
214 FIO_CPUIO = 1 << 1, /* cpu burner, doesn't do real io */
215 FIO_MMAPIO = 1 << 2, /* uses memory mapped io */
216 FIO_RAWIO = 1 << 3, /* some sort of direct/raw io */
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217 FIO_DISKLESSIO = 1 << 4, /* no disk involved */
218 FIO_SELFOPEN = 1 << 5, /* opens its own devices */
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219};
220
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221/*
222 * Each thread_data structure has a number of files associated with it,
223 * this structure holds state information for a single file.
224 */
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225struct fio_file {
226 /*
227 * A file may not be a file descriptor, let the io engine decide
228 */
229 union {
230 unsigned long file_data;
e26f8f7a 231 int fd;
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232 };
233 char *file_name;
234 void *mmap;
235 unsigned long long file_size;
236 unsigned long long real_file_size;
237 unsigned long long file_offset;
238 unsigned long long last_pos;
02bcaa8c 239 unsigned long long last_completed_pos;
53cdc686 240
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241 /*
242 * block map for random io
243 */
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244 unsigned long *file_map;
245 unsigned int num_maps;
1c9e06ee 246 unsigned int last_free_lookup;
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247
248 unsigned int unlink;
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249};
250
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251struct thread_stat {
252 struct io_log *slat_log;
253 struct io_log *clat_log;
254 struct io_log *bw_log;
255
256 /*
257 * bandwidth and latency stats
258 */
259 struct io_stat clat_stat[2]; /* completion latency */
260 struct io_stat slat_stat[2]; /* submission latency */
261 struct io_stat bw_stat[2]; /* bandwidth stats */
262
263 unsigned long long stat_io_bytes[2];
264 struct timeval stat_sample_time[2];
265
266 /*
267 * fio system usage accounting
268 */
269 struct rusage ru_start;
270 struct rusage ru_end;
271 unsigned long usr_time;
272 unsigned long sys_time;
273 unsigned long ctx;
274};
275
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276/*
277 * How many depth levels to log
278 */
279#define FIO_IO_U_MAP_NR 8
ec118304 280#define FIO_IO_U_LAT_NR 12
71619dc2 281
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282/*
283 * This describes a single thread/process executing a fio job.
284 */
ebac4655 285struct thread_data {
b1ec1da6 286 int pad;
61697c37 287 char *description;
b4692828 288 char *name;
ef899b63 289 char *directory;
13f8e2d2 290 char *filename;
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291 char verror[80];
292 pthread_t thread;
293 int thread_number;
294 int groupid;
079ad09b 295 struct thread_stat ts;
e9c047a0 296 enum fio_filetype filetype;
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297 struct fio_file *files;
298 unsigned int nr_files;
bdb4e2e9 299 unsigned int nr_open_files;
13f8e2d2 300 unsigned int nr_uniq_files;
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301 union {
302 unsigned int next_file;
303 os_random_state_t next_file_state;
304 };
ebac4655 305 int error;
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306 pid_t pid;
307 char *orig_buffer;
308 size_t orig_buffer_size;
309 volatile int terminate;
310 volatile int runstate;
413dd459 311 enum td_ddir td_ddir;
ebac4655 312 unsigned int ioprio;
87dc1ab1 313 unsigned int last_was_sync;
e9c047a0 314
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315 unsigned int odirect;
316 unsigned int invalidate_cache;
317 unsigned int create_serialize;
318 unsigned int create_fsync;
319 unsigned int end_fsync;
320 unsigned int sync_io;
321 unsigned int verify;
322 unsigned int use_thread;
323 unsigned int unlink;
324 unsigned int do_disk_util;
325 unsigned int override_sync;
326 unsigned int rand_repeatable;
327 unsigned int write_lat_log;
328 unsigned int write_bw_log;
bb8895e0 329 unsigned int norandommap;
690adba3 330 unsigned int bs_unaligned;
e9c047a0 331
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332 unsigned int bs[2];
333 unsigned int min_bs[2];
334 unsigned int max_bs[2];
56bb17f2 335 unsigned int hugepage_size;
a00735e6 336 unsigned int rw_min_bs;
ebac4655 337 unsigned int thinktime;
48097d5c 338 unsigned int thinktime_spin;
9c1f7434 339 unsigned int thinktime_blocks;
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340 unsigned int fsync_blocks;
341 unsigned int start_delay;
906c8d75 342 unsigned long timeout;
ebac4655 343 unsigned int overwrite;
ebac4655 344 unsigned int bw_avg_time;
ebac4655 345 unsigned int loops;
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346 unsigned long long zone_size;
347 unsigned long long zone_skip;
e9c047a0 348 enum fio_memtype mem_type;
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349 char *mmapfile;
350 int mmapfd;
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351 unsigned int stonewall;
352 unsigned int numjobs;
ebac4655 353 unsigned int iodepth;
e916b390 354 unsigned int iodepth_low;
cb5ab512 355 unsigned int iodepth_batch;
ebac4655 356 os_cpu_mask_t cpumask;
aea47d44 357 unsigned int iolog;
843a7413 358 unsigned int read_iolog;
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359 unsigned int rwmixcycle;
360 unsigned int rwmixread;
e1f36503 361 unsigned int rwmixwrite;
b6f4d880 362 unsigned int nice;
0aabe160 363 unsigned int file_service_type;
aea47d44 364
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365 char *read_iolog_file;
366 char *write_iolog_file;
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367 void *iolog_buf;
368 FILE *iolog_f;
ebac4655 369
da86774e 370 char *sysfs_root;
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371 char *ioscheduler;
372
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373 os_random_state_t bsrange_state;
374 os_random_state_t verify_state;
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375
376 int shm_id;
377
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378 /*
379 * IO engine hooks, contains everything needed to submit an io_u
380 * to any of the available IO engines.
381 */
2866c82d 382 struct ioengine_ops *io_ops;
ebac4655 383
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384 /*
385 * Current IO depth and list of free and busy io_u's.
386 */
ebac4655 387 unsigned int cur_depth;
71619dc2 388 unsigned int io_u_map[FIO_IO_U_MAP_NR];
ec118304 389 unsigned int io_u_lat[FIO_IO_U_LAT_NR];
71619dc2 390 unsigned long total_io_u;
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391 struct list_head io_u_freelist;
392 struct list_head io_u_busylist;
755200a3 393 struct list_head io_u_requeues;
cb5ab512 394 unsigned int io_u_queued;
ebac4655 395
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396 /*
397 * Rate state
398 */
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399 unsigned int rate;
400 unsigned int ratemin;
401 unsigned int ratecycle;
402 unsigned long rate_usec_cycle;
403 long rate_pending_usleep;
404 unsigned long rate_bytes;
405 struct timeval lastrate;
406
407 unsigned long runtime[2]; /* msec */
408 unsigned long long io_size;
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409 unsigned long long total_file_size;
410 unsigned long long start_offset;
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411 unsigned long long total_io_size;
412
755200a3 413 unsigned long io_issues[2];
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414 unsigned long long io_blocks[2];
415 unsigned long long io_bytes[2];
9104f874 416 unsigned long long this_io_bytes[2];
079ad09b 417 unsigned long long zone_bytes;
bbfd6b00 418 volatile int mutex;
ebac4655 419
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420 /*
421 * State for random io, a bitmap of blocks done vs not done
422 */
6dfd46b9 423 os_random_state_t random_state;
ebac4655 424
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425 /*
426 * CPU "io" cycle burner
427 */
428 unsigned int cpuload;
429 unsigned int cpucycle;
430
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431 struct timeval start; /* start of this loop */
432 struct timeval epoch; /* time job was started */
69008999 433 struct timeval end_time;/* time job ended */
ebac4655 434
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435 /*
436 * read/write mixed workload state
437 */
6dfd46b9 438 os_random_state_t rwmix_state;
a6ccc7be 439 struct timeval rwmix_switch;
e9c047a0 440 enum fio_ddir rwmix_ddir;
a6ccc7be 441
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442 /*
443 * Pre-run and post-run shell
444 */
445 char *exec_prerun;
446 char *exec_postrun;
447
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448 /*
449 * IO historic logs
450 */
ebac4655 451 struct list_head io_hist_list;
aea47d44 452 struct list_head io_log_list;
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453
454 /*
455 * timeout handling
456 */
457 struct timeval timeout_end;
458 struct itimerval timer;
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459};
460
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461/*
462 * roundrobin available files, or choose one at random.
463 */
464enum {
465 FIO_FSERVICE_RANDOM = 1,
466 FIO_FSERVICE_RR = 2,
467};
468
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469/*
470 * 30 second per-io_u timeout, with 5 second intervals to avoid resetting
471 * the timer on each queue operation.
472 */
473#define IO_U_TIMEOUT_INC 5
474#define IO_U_TIMEOUT 30
475
e1161c32 476#define __td_verror(td, err, msg, func) \
ebac4655 477 do { \
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478 if ((td)->error) \
479 break; \
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480 int e = (err); \
481 (td)->error = e; \
e1161c32 482 snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
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483 } while (0)
484
b990b5c0 485
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486#define td_verror(td, err, func) \
487 __td_verror((td), (err), strerror((err)), (func))
488#define td_vmsg(td, err, msg, func) \
489 __td_verror((td), (err), (msg), (func))
b990b5c0 490
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491extern int exitall_on_terminate;
492extern int thread_number;
493extern int shm_id;
494extern int groupid;
c6ae0a5b 495extern int terse_output;
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496extern FILE *f_out;
497extern FILE *f_err;
53cdc686 498extern int temp_stall_ts;
1e97cce9 499extern unsigned long long mlock_size;
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500
501extern struct thread_data *threads;
502
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503#define td_read(td) ((td)->td_ddir & TD_DDIR_READ)
504#define td_write(td) ((td)->td_ddir & TD_DDIR_WRITE)
505#define td_rw(td) (((td)->td_ddir & TD_DDIR_RW) == TD_DDIR_RW)
506#define td_random(td) ((td)->td_ddir & TD_DDIR_RAND)
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507
508#define BLOCKS_PER_MAP (8 * sizeof(long))
a00735e6 509#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->rw_min_bs))
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510#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
511#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
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512
513#define MAX_JOBS (1024)
514
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515static inline int should_fsync(struct thread_data *td)
516{
517 if (td->last_was_sync)
518 return 0;
519 if (td->odirect)
520 return 0;
521 if (td_write(td) || td_rw(td) || td->override_sync)
522 return 1;
523
524 return 0;
525}
526
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527/*
528 * Disk utils as read in /sys/block/<dev>/stat
529 */
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530struct disk_util_stat {
531 unsigned ios[2];
532 unsigned merges[2];
533 unsigned long long sectors[2];
534 unsigned ticks[2];
535 unsigned io_ticks;
536 unsigned time_in_queue;
537};
538
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539/*
540 * Per-device disk util management
541 */
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542struct disk_util {
543 struct list_head list;
544
545 char *name;
546 char path[256];
547 dev_t dev;
548
549 struct disk_util_stat dus;
550 struct disk_util_stat last_dus;
551
552 unsigned long msec;
553 struct timeval time;
554};
555
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556#define DISK_UTIL_MSEC (250)
557
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558#ifndef min
559#define min(a, b) ((a) < (b) ? (a) : (b))
560#endif
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561#ifndef max
562#define max(a, b) ((a) > (b) ? (a) : (b))
563#endif
6a0106a0 564
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565/*
566 * Log exports
567 */
72cb971b 568extern int __must_check read_iolog_get(struct thread_data *, struct io_u *);
6796209a 569extern void write_iolog_put(struct thread_data *, struct io_u *);
72cb971b 570extern int __must_check init_iolog(struct thread_data *td);
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571extern void log_io_piece(struct thread_data *, struct io_u *);
572extern void prune_io_piece_log(struct thread_data *);
573extern void write_iolog_close(struct thread_data *);
574
575/*
576 * Logging
577 */
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578extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
579extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
580extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
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581extern void show_run_stats(void);
582extern void init_disk_util(struct thread_data *);
583extern void update_rusage_stat(struct thread_data *);
584extern void update_io_ticks(void);
585extern void disk_util_timer_arm(void);
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586extern void setup_log(struct io_log **);
587extern void finish_log(struct thread_data *, struct io_log *, const char *);
bb3884d8 588extern void __finish_log(struct io_log *, const char *);
8914a9d8 589extern int setup_rate(struct thread_data *);
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590extern struct io_log *agg_io_log[2];
591extern int write_bw_log;
592extern void add_agg_sample(unsigned long, enum fio_ddir);
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593
594/*
595 * Time functions
596 */
597extern unsigned long utime_since(struct timeval *, struct timeval *);
69008999 598extern unsigned long utime_since_now(struct timeval *);
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599extern unsigned long mtime_since(struct timeval *, struct timeval *);
600extern unsigned long mtime_since_now(struct timeval *);
601extern unsigned long time_since_now(struct timeval *);
263e529f 602extern unsigned long mtime_since_genesis(void);
b990b5c0 603extern void __usec_sleep(unsigned int);
6796209a 604extern void usec_sleep(struct thread_data *, unsigned long);
413dd459 605extern void rate_throttle(struct thread_data *, unsigned long, unsigned int);
6043c579 606extern void fill_start_time(struct timeval *);
02bcaa8c 607extern void fio_gettime(struct timeval *, void *);
a2f77c9f 608extern void set_genesis_time(void);
6796209a 609
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610/*
611 * Init functions
612 */
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613extern int __must_check parse_options(int, char **);
614extern int __must_check init_random_state(struct thread_data *);
8914a9d8 615
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616/*
617 * File setup/shutdown
618 */
619extern void close_files(struct thread_data *);
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620extern int __must_check setup_files(struct thread_data *);
621extern int __must_check open_files(struct thread_data *);
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622extern int open_file(struct thread_data *, struct fio_file *, int, int);
623extern void close_file(struct thread_data *, struct fio_file *);
b2fdda43 624extern int __must_check file_invalidate_cache(struct thread_data *, struct fio_file *);
53cdc686 625
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626/*
627 * ETA/status stuff
628 */
629extern void print_thread_status(void);
630extern void print_status_init(int);
631
632/*
633 * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
634 * will never back again. It may cycle between running/verififying/fsyncing.
635 * Once the thread reaches TD_EXITED, it is just waiting for the core to
636 * reap it.
637 */
638enum {
639 TD_NOT_CREATED = 0,
640 TD_CREATED,
641 TD_INITIALIZED,
642 TD_RUNNING,
643 TD_VERIFYING,
644 TD_FSYNCING,
645 TD_EXITED,
646 TD_REAPED,
647};
648
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649/*
650 * Verify helpers
651 */
652extern void populate_verify_io_u(struct thread_data *, struct io_u *);
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653extern int __must_check get_next_verify(struct thread_data *td, struct io_u *);
654extern int __must_check verify_io_u(struct io_u *);
e29d1b70 655
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656/*
657 * Memory helpers
658 */
b2fdda43 659extern int __must_check fio_pin_memory(void);
2f9ade3c 660extern void fio_unpin_memory(void);
b2fdda43 661extern int __must_check allocate_io_mem(struct thread_data *);
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662extern void free_io_mem(struct thread_data *);
663
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664/*
665 * io unit handling
666 */
667#define queue_full(td) list_empty(&(td)->io_u_freelist)
668extern struct io_u *__get_io_u(struct thread_data *);
3d7c391d 669extern struct io_u *get_io_u(struct thread_data *);
10ba535a 670extern void put_io_u(struct thread_data *, struct io_u *);
755200a3 671extern void requeue_io_u(struct thread_data *, struct io_u **);
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672extern long __must_check io_u_sync_complete(struct thread_data *, struct io_u *);
673extern long __must_check io_u_queued_complete(struct thread_data *, int);
7e77dd02 674extern void io_u_queued(struct thread_data *, struct io_u *);
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675extern void io_u_init_timeout(void);
676extern void io_u_set_timeout(struct thread_data *);
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677
678/*
679 * io engine entry points
680 */
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681extern int __must_check td_io_init(struct thread_data *);
682extern int __must_check td_io_prep(struct thread_data *, struct io_u *);
683extern int __must_check td_io_queue(struct thread_data *, struct io_u *);
684extern int __must_check td_io_sync(struct thread_data *, struct fio_file *);
685extern int __must_check td_io_getevents(struct thread_data *, int, int, struct timespec *);
686extern int __must_check td_io_commit(struct thread_data *);
10ba535a 687
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688/*
689 * This is a pretty crappy semaphore implementation, but with the use that fio
690 * has (just signalling start/go conditions), it doesn't have to be better.
691 * Naturally this would not work for any type of contended semaphore or
692 * for real locking.
693 */
1056eaad 694static inline void fio_sem_init(volatile int *sem, int val)
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695{
696 *sem = val;
697}
698
1056eaad 699static inline void fio_sem_down(volatile int *sem)
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700{
701 while (*sem == 0)
702 usleep(10000);
703
704 (*sem)--;
705}
706
1056eaad 707static inline void fio_sem_up(volatile int *sem)
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708{
709 (*sem)++;
710}
711
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712/*
713 * If logging output to a file, stderr should go to both stderr and f_err
714 */
715#define log_err(args...) do { \
716 fprintf(f_err, ##args); \
717 if (f_err != stderr) \
718 fprintf(stderr, ##args); \
719 } while (0)
720
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721FILE *get_f_out(void);
722FILE *get_f_err(void);
723
2866c82d 724struct ioengine_ops {
5f350952 725 struct list_head list;
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726 char name[16];
727 int version;
728 int flags;
ea2877a4 729 int (*setup)(struct thread_data *);
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730 int (*init)(struct thread_data *);
731 int (*prep)(struct thread_data *, struct io_u *);
732 int (*queue)(struct thread_data *, struct io_u *);
755200a3 733 int (*commit)(struct thread_data *);
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734 int (*getevents)(struct thread_data *, int, int, struct timespec *);
735 struct io_u *(*event)(struct thread_data *, int);
736 int (*cancel)(struct thread_data *, struct io_u *);
737 void (*cleanup)(struct thread_data *);
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738 void *data;
739 void *dlhandle;
36167d82 740 unsigned long priv;
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741};
742
755200a3 743#define FIO_IOOPS_VERSION 5
2866c82d 744
b4692828 745extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
b2fdda43 746extern void register_ioengine(struct ioengine_ops *);
5f350952 747extern void unregister_ioengine(struct ioengine_ops *);
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748extern void close_ioengine(struct thread_data *);
749
750/*
751 * Mark unused variables passed to ops functions as unused, to silence gcc
752 */
753#define fio_unused __attribute((__unused__))
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754#define fio_init __attribute__((constructor))
755#define fio_exit __attribute__((destructor))
2866c82d 756
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757#define for_each_td(td, i) \
758 for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
53cdc686 759#define for_each_file(td, f, i) \
34572e28 760 for ((i) = 0, (f) = &(td)->files[0]; (i) < (int) (td)->nr_files; (i)++, (f)++)
53cdc686 761
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762#define fio_assert(td, cond) do { \
763 if (!(cond)) { \
340fd243 764 int *__foo = NULL; \
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765 fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
766 (td)->runstate = TD_EXITED; \
437c9b71 767 (td)->error = EFAULT; \
340fd243 768 *__foo = 0; \
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769 } \
770} while (0)
771
ebac4655 772#endif