Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 1 | /* |
gurudas pai | a31041e | 2007-10-23 15:12:30 +0200 | [diff] [blame^] | 2 | * sync/psync engine |
Jens Axboe | da751ca | 2007-03-14 10:59:33 +0100 | [diff] [blame] | 3 | * |
| 4 | * IO engine that does regular read(2)/write(2) with lseek(2) to transfer |
gurudas pai | a31041e | 2007-10-23 15:12:30 +0200 | [diff] [blame^] | 5 | * data and IO engine that does regular pread(2)/pwrite(2) to transfer data. |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 6 | * |
| 7 | */ |
| 8 | #include <stdio.h> |
| 9 | #include <stdlib.h> |
| 10 | #include <unistd.h> |
| 11 | #include <errno.h> |
| 12 | #include <assert.h> |
Jens Axboe | 5f35095 | 2006-11-07 15:20:59 +0100 | [diff] [blame] | 13 | |
| 14 | #include "../fio.h" |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 15 | |
gurudas pai | a31041e | 2007-10-23 15:12:30 +0200 | [diff] [blame^] | 16 | #define is_psync(td) ((td)->io_ops->data == (void *) 1) |
| 17 | |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 18 | static int fio_syncio_prep(struct thread_data *td, struct io_u *io_u) |
| 19 | { |
Jens Axboe | 53cdc68 | 2006-10-18 11:50:58 +0200 | [diff] [blame] | 20 | struct fio_file *f = io_u->file; |
| 21 | |
Jens Axboe | 87dc1ab | 2006-10-24 14:41:26 +0200 | [diff] [blame] | 22 | if (io_u->ddir == DDIR_SYNC) |
| 23 | return 0; |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 24 | if (io_u->offset == f->last_completed_pos) |
| 25 | return 0; |
Jens Axboe | 87dc1ab | 2006-10-24 14:41:26 +0200 | [diff] [blame] | 26 | |
Jens Axboe | 53cdc68 | 2006-10-18 11:50:58 +0200 | [diff] [blame] | 27 | if (lseek(f->fd, io_u->offset, SEEK_SET) == -1) { |
Jens Axboe | e1161c3 | 2007-02-22 19:36:48 +0100 | [diff] [blame] | 28 | td_verror(td, errno, "lseek"); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 29 | return 1; |
| 30 | } |
| 31 | |
| 32 | return 0; |
| 33 | } |
| 34 | |
| 35 | static int fio_syncio_queue(struct thread_data *td, struct io_u *io_u) |
| 36 | { |
Jens Axboe | 53cdc68 | 2006-10-18 11:50:58 +0200 | [diff] [blame] | 37 | struct fio_file *f = io_u->file; |
Jens Axboe | cec6b55 | 2007-02-06 20:15:38 +0100 | [diff] [blame] | 38 | int ret; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 39 | |
Jens Axboe | 7101d9c | 2007-09-12 13:12:39 +0200 | [diff] [blame] | 40 | fio_ro_check(td, io_u); |
| 41 | |
gurudas pai | a31041e | 2007-10-23 15:12:30 +0200 | [diff] [blame^] | 42 | if (io_u->ddir == DDIR_READ) { |
| 43 | if (is_psync(td)) |
| 44 | ret = pread(f->fd, io_u->xfer_buf, io_u->xfer_buflen,io_u->offset); |
| 45 | else |
| 46 | ret = read(f->fd, io_u->xfer_buf, io_u->xfer_buflen); |
| 47 | } else if (io_u->ddir == DDIR_WRITE) { |
| 48 | if (is_psync(td)) |
| 49 | ret = pwrite(f->fd, io_u->xfer_buf, io_u->xfer_buflen,io_u->offset); |
| 50 | else |
| 51 | ret = write(f->fd, io_u->xfer_buf, io_u->xfer_buflen); |
| 52 | } else |
Jens Axboe | 87dc1ab | 2006-10-24 14:41:26 +0200 | [diff] [blame] | 53 | ret = fsync(f->fd); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 54 | |
Jens Axboe | cec6b55 | 2007-02-06 20:15:38 +0100 | [diff] [blame] | 55 | if (ret != (int) io_u->xfer_buflen) { |
Jens Axboe | 22819ec | 2007-02-18 07:47:14 +0100 | [diff] [blame] | 56 | if (ret >= 0) { |
Jens Axboe | cec6b55 | 2007-02-06 20:15:38 +0100 | [diff] [blame] | 57 | io_u->resid = io_u->xfer_buflen - ret; |
| 58 | io_u->error = 0; |
Jens Axboe | 36167d8 | 2007-02-18 05:41:31 +0100 | [diff] [blame] | 59 | return FIO_Q_COMPLETED; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 60 | } else |
| 61 | io_u->error = errno; |
| 62 | } |
| 63 | |
Jens Axboe | 36167d8 | 2007-02-18 05:41:31 +0100 | [diff] [blame] | 64 | if (io_u->error) |
Jens Axboe | e1161c3 | 2007-02-22 19:36:48 +0100 | [diff] [blame] | 65 | td_verror(td, io_u->error, "xfer"); |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 66 | |
Jens Axboe | 36167d8 | 2007-02-18 05:41:31 +0100 | [diff] [blame] | 67 | return FIO_Q_COMPLETED; |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 68 | } |
| 69 | |
gurudas pai | a31041e | 2007-10-23 15:12:30 +0200 | [diff] [blame^] | 70 | static int fio_psyncio_init(struct thread_data *td) |
| 71 | { |
| 72 | td->io_ops->data = (void *) 1; |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | static struct ioengine_ops ioengine_rw = { |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 77 | .name = "sync", |
| 78 | .version = FIO_IOOPS_VERSION, |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 79 | .prep = fio_syncio_prep, |
| 80 | .queue = fio_syncio_queue, |
Jens Axboe | b5af829 | 2007-03-08 12:43:13 +0100 | [diff] [blame] | 81 | .open_file = generic_open_file, |
| 82 | .close_file = generic_close_file, |
Jens Axboe | 2866c82 | 2006-10-09 15:57:48 +0200 | [diff] [blame] | 83 | .flags = FIO_SYNCIO, |
| 84 | }; |
Jens Axboe | 5f35095 | 2006-11-07 15:20:59 +0100 | [diff] [blame] | 85 | |
gurudas pai | a31041e | 2007-10-23 15:12:30 +0200 | [diff] [blame^] | 86 | static struct ioengine_ops ioengine_prw = { |
| 87 | .name = "psync", |
| 88 | .version = FIO_IOOPS_VERSION, |
| 89 | .queue = fio_syncio_queue, |
| 90 | .init = fio_psyncio_init, |
| 91 | .open_file = generic_open_file, |
| 92 | .close_file = generic_close_file, |
| 93 | .flags = FIO_SYNCIO, |
| 94 | }; |
| 95 | |
Jens Axboe | 5f35095 | 2006-11-07 15:20:59 +0100 | [diff] [blame] | 96 | static void fio_init fio_syncio_register(void) |
| 97 | { |
gurudas pai | a31041e | 2007-10-23 15:12:30 +0200 | [diff] [blame^] | 98 | register_ioengine(&ioengine_rw); |
| 99 | register_ioengine(&ioengine_prw); |
Jens Axboe | 5f35095 | 2006-11-07 15:20:59 +0100 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | static void fio_exit fio_syncio_unregister(void) |
| 103 | { |
gurudas pai | a31041e | 2007-10-23 15:12:30 +0200 | [diff] [blame^] | 104 | unregister_ioengine(&ioengine_rw); |
| 105 | unregister_ioengine(&ioengine_prw); |
Jens Axboe | 5f35095 | 2006-11-07 15:20:59 +0100 | [diff] [blame] | 106 | } |