posixaio.c revision df9c26b10275a631e83e7cc92d5f7384998b2c49
12866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe/* 2da751ca9665bcdeca56d2eec5b629a0953c07662Jens Axboe * posixaio engine 3da751ca9665bcdeca56d2eec5b629a0953c07662Jens Axboe * 4da751ca9665bcdeca56d2eec5b629a0953c07662Jens Axboe * IO engine that uses the posix defined aio interface. 52866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe * 62866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe */ 72866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe#include <stdio.h> 82866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe#include <stdlib.h> 92866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe#include <unistd.h> 102866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe#include <errno.h> 11bc733f3b3ae7d397a591e3616503cfb36d56166bJens Axboe#include <fcntl.h> 125f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe 135f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe#include "../fio.h" 142866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1534cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe#ifdef FIO_HAVE_POSIXAIO 1634cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe 172866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboestruct posixaio_data { 182866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct io_u **aio_events; 19207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe unsigned int queued; 202866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe}; 212866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 222866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboestatic int fill_timespec(struct timespec *ts) 232866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe{ 242866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe#ifdef _POSIX_TIMERS 252866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (!clock_gettime(CLOCK_MONOTONIC, ts)) 262866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return 0; 272866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 282866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe perror("clock_gettime"); 292866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe#endif 302866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return 1; 312866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe} 322866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 332866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboestatic unsigned long long ts_utime_since_now(struct timespec *t) 342866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe{ 352866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe long long sec, nsec; 362866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct timespec now; 372866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 382866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (fill_timespec(&now)) 392866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return 0; 402866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 412866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe sec = now.tv_sec - t->tv_sec; 422866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe nsec = now.tv_nsec - t->tv_nsec; 432866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (sec > 0 && nsec < 0) { 442866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe sec--; 452866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe nsec += 1000000000; 462866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe } 472866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 482866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe sec *= 1000000; 492866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe nsec /= 1000; 502866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return sec + nsec; 512866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe} 522866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 537a16dd027f83d7ff8ff0e72bb6bb12fae046fcbfJens Axboestatic int fio_posixaio_cancel(struct thread_data fio_unused *td, 547a16dd027f83d7ff8ff0e72bb6bb12fae046fcbfJens Axboe struct io_u *io_u) 552866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe{ 5653cdc6864f7471b28cc9b40a5314ab43e5b1cb5eJens Axboe struct fio_file *f = io_u->file; 5753cdc6864f7471b28cc9b40a5314ab43e5b1cb5eJens Axboe int r = aio_cancel(f->fd, &io_u->aiocb); 582866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 592866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (r == 1 || r == AIO_CANCELED) 602866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return 0; 612866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 622866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return 1; 632866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe} 642866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 657a16dd027f83d7ff8ff0e72bb6bb12fae046fcbfJens Axboestatic int fio_posixaio_prep(struct thread_data fio_unused *td, 667a16dd027f83d7ff8ff0e72bb6bb12fae046fcbfJens Axboe struct io_u *io_u) 672866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe{ 682866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct aiocb *aiocb = &io_u->aiocb; 6953cdc6864f7471b28cc9b40a5314ab43e5b1cb5eJens Axboe struct fio_file *f = io_u->file; 702866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 7153cdc6864f7471b28cc9b40a5314ab43e5b1cb5eJens Axboe aiocb->aio_fildes = f->fd; 72cec6b55da1c282b5b91ad346c7804171fccf151eJens Axboe aiocb->aio_buf = io_u->xfer_buf; 73cec6b55da1c282b5b91ad346c7804171fccf151eJens Axboe aiocb->aio_nbytes = io_u->xfer_buflen; 742866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe aiocb->aio_offset = io_u->offset; 752866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 762866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe io_u->seen = 0; 772866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return 0; 782866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe} 792866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 803c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe#define SUSPEND_ENTRIES 8 813c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe 82e7d2e61694c62b90a2fb84c012b4edcc1973d72cJens Axboestatic int fio_posixaio_getevents(struct thread_data *td, unsigned int min, 83e7d2e61694c62b90a2fb84c012b4edcc1973d72cJens Axboe unsigned int max, struct timespec *t) 842866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe{ 852866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct posixaio_data *pd = td->io_ops->data; 863c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe struct aiocb *suspend_list[SUSPEND_ENTRIES]; 8701743ee1718e7ec4b16ae3e53c8f64900c6052ccJens Axboe struct flist_head *entry; 882866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct timespec start; 89a3cc770d09992e7823879fc167057a52ecbfddefJens Axboe int have_timeout = 0; 903c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe int suspend_entries = 0; 91a3cc770d09992e7823879fc167057a52ecbfddefJens Axboe unsigned int r; 922866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 932866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (t && !fill_timespec(&start)) 942866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe have_timeout = 1; 952866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 962866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe r = 0; 97565cc35f1c9bfd16465c69997c7ba7a6ab0809a0Jens Axboe memset(suspend_list, 0, sizeof(*suspend_list)); 982866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboerestart: 9901743ee1718e7ec4b16ae3e53c8f64900c6052ccJens Axboe flist_for_each(entry, &td->io_u_busylist) { 10001743ee1718e7ec4b16ae3e53c8f64900c6052ccJens Axboe struct io_u *io_u = flist_entry(entry, struct io_u, list); 1012866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe int err; 1022866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1032866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (io_u->seen) 1042866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe continue; 1052866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1062866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe err = aio_error(&io_u->aiocb); 1073c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe if (err == EINPROGRESS) { 1083c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe if (suspend_entries < SUSPEND_ENTRIES) { 1093c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe suspend_list[suspend_entries] = &io_u->aiocb; 1103c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe suspend_entries++; 1113c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe } 1123f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe continue; 1133c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe } 1143f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe 1153f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe io_u->seen = 1; 116207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe pd->queued--; 1173f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe pd->aio_events[r++] = io_u; 1183f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe 1193f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe if (err == ECANCELED) 1203f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe io_u->resid = io_u->xfer_buflen; 1213f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe else if (!err) { 1223f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe ssize_t retval = aio_return(&io_u->aiocb); 1233f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe 1243f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe io_u->resid = io_u->xfer_buflen - retval; 1253f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe } else 1263f344316b3200143f413c9a4a8fd6476ca5899cfJens Axboe io_u->error = err; 1272866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1282866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (r >= max) 1292866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe break; 1302866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe } 1312866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1322866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (r >= min) 1332866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return r; 1342866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1352866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (have_timeout) { 1362866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe unsigned long long usec; 1372866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1382866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe usec = (t->tv_sec * 1000000) + (t->tv_nsec / 1000); 1392866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (ts_utime_since_now(&start) > usec) 1402866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return r; 1412866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe } 1422866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1432866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe /* 1443c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe * must have some in-flight, wait for at least one 1452866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe */ 1463c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe aio_suspend((const struct aiocb * const *)suspend_list, 1473c77037e67c4a4af29e12f760db2541bad6c5898Jens Axboe suspend_entries, t); 1482866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe goto restart; 1492866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe} 1502866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1512866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboestatic struct io_u *fio_posixaio_event(struct thread_data *td, int event) 1522866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe{ 1532866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct posixaio_data *pd = td->io_ops->data; 1542866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1552866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return pd->aio_events[event]; 1562866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe} 1572866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1582866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboestatic int fio_posixaio_queue(struct thread_data fio_unused *td, 1592866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct io_u *io_u) 1602866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe{ 161207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe struct posixaio_data *pd = td->io_ops->data; 1622866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct aiocb *aiocb = &io_u->aiocb; 1632866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe int ret; 1642866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1657101d9c24abec4be58a086d85d6d92ec6e6492e9Jens Axboe fio_ro_check(td, io_u); 1667101d9c24abec4be58a086d85d6d92ec6e6492e9Jens Axboe 1672866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (io_u->ddir == DDIR_READ) 1682866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe ret = aio_read(aiocb); 16987dc1ab1b4df7b977f60e3d43533a896e2ee665bJens Axboe else if (io_u->ddir == DDIR_WRITE) 1702866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe ret = aio_write(aiocb); 171207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe else { 172207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe#ifdef FIO_HAVE_POSIXAIO_FSYNC 17387dc1ab1b4df7b977f60e3d43533a896e2ee665bJens Axboe ret = aio_fsync(O_SYNC, aiocb); 174207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe#else 175207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe if (pd->queued) 176207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe return FIO_Q_BUSY; 177207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe 178207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe if (fsync(io_u->file->fd) < 0) 179207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe io_u->error = errno; 1802866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 181207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe return FIO_Q_COMPLETED; 182207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe#endif 183207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe } 184207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe 18595bcd815e5ce55d6cdd8eb83bda5ee411f37bdc9Jens Axboe if (ret) { 1862866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe io_u->error = errno; 187e1161c325f7866bae879e686d1c673ca32ab09aeJens Axboe td_verror(td, io_u->error, "xfer"); 18836167d82e5f49dee91c6d2cd426068edee90e36fJens Axboe return FIO_Q_COMPLETED; 18995bcd815e5ce55d6cdd8eb83bda5ee411f37bdc9Jens Axboe } 19036167d82e5f49dee91c6d2cd426068edee90e36fJens Axboe 191207cb0f05e689a50ffb960830f52169a1342aba7Jens Axboe pd->queued++; 19236167d82e5f49dee91c6d2cd426068edee90e36fJens Axboe return FIO_Q_QUEUED; 1932866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe} 1942866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1952866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboestatic void fio_posixaio_cleanup(struct thread_data *td) 1962866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe{ 1972866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct posixaio_data *pd = td->io_ops->data; 1982866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 1992866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe if (pd) { 2002866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe free(pd->aio_events); 2012866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe free(pd); 2022866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe } 2032866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe} 2042866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 2052866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboestatic int fio_posixaio_init(struct thread_data *td) 2062866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe{ 2072866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe struct posixaio_data *pd = malloc(sizeof(*pd)); 2082866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 209cb781c758e5df7ff4c6f655c1e4f9df3043a4be9Jens Axboe memset(pd, 0, sizeof(*pd)); 2102dc1bbeb58edc85f2829eed6729862c438ea2353Jens Axboe pd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u *)); 2112dc1bbeb58edc85f2829eed6729862c438ea2353Jens Axboe memset(pd->aio_events, 0, td->o.iodepth * sizeof(struct io_u *)); 2122866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 2132866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe td->io_ops->data = pd; 2142866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe return 0; 2152866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe} 2162866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe 2175f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboestatic struct ioengine_ops ioengine = { 2182866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe .name = "posixaio", 2192866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe .version = FIO_IOOPS_VERSION, 2202866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe .init = fio_posixaio_init, 2212866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe .prep = fio_posixaio_prep, 2222866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe .queue = fio_posixaio_queue, 2232866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe .cancel = fio_posixaio_cancel, 2242866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe .getevents = fio_posixaio_getevents, 2252866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe .event = fio_posixaio_event, 2262866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe .cleanup = fio_posixaio_cleanup, 227b5af82930ccfd7dda6a1b11794efb452eb76d8dcJens Axboe .open_file = generic_open_file, 228b5af82930ccfd7dda6a1b11794efb452eb76d8dcJens Axboe .close_file = generic_close_file, 229df9c26b10275a631e83e7cc92d5f7384998b2c49Jens Axboe .get_file_size = generic_get_file_size, 2302866c82d598e30604d8a92723c664ee6ced90fb0Jens Axboe}; 23134cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe 23234cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe#else /* FIO_HAVE_POSIXAIO */ 23334cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe 23434cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe/* 23534cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe * When we have a proper configure system in place, we simply wont build 23634cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe * and install this io engine. For now install a crippled version that 23734cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe * just complains and fails to load. 23834cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe */ 23934cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboestatic int fio_posixaio_init(struct thread_data fio_unused *td) 24034cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe{ 24134cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe fprintf(stderr, "fio: posixaio not available\n"); 24234cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe return 1; 24334cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe} 24434cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe 2455f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboestatic struct ioengine_ops ioengine = { 24634cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe .name = "posixaio", 24734cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe .version = FIO_IOOPS_VERSION, 24834cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe .init = fio_posixaio_init, 24934cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe}; 25034cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe 25134cfcdafa994a0a75120e498c51eda08bde5df72Jens Axboe#endif 2525f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe 2535f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboestatic void fio_init fio_posixaio_register(void) 2545f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe{ 2555f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe register_ioengine(&ioengine); 2565f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe} 2575f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe 2585f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboestatic void fio_exit fio_posixaio_unregister(void) 2595f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe{ 2605f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe unregister_ioengine(&ioengine); 2615f350952eff89948bfbf1eb6ac4d3d08a9109581Jens Axboe} 262