projects / fio.git / blame
| Commit | Line | Data |
|---|---|---|
| 2866c82d | 1 | /* |
| a31041ea | 2 | * sync/psync engine |
| da751ca9 JA |
3 | * |
| 4 | * IO engine that does regular read(2)/write(2) with lseek(2) to transfer | |
| a31041ea | 5 | * data and IO engine that does regular pread(2)/pwrite(2) to transfer data. |
| 2866c82d JA |
6 | * |
| 7 | */ | |
| 8 | #include <stdio.h> | |
| 9 | #include <stdlib.h> | |
| 10 | #include <unistd.h> | |
| 11 | #include <errno.h> | |
| 12 | #include <assert.h> | |
| 5f350952 JA |
13 | |
| 14 | #include "../fio.h" | |
| 2866c82d | 15 | |
| a31041ea | 16 | #define is_psync(td) ((td)->io_ops->data == (void *) 1) |
| 17 | ||
| 2866c82d JA |
18 | static int fio_syncio_prep(struct thread_data *td, struct io_u *io_u) |
| 19 | { | |
| 53cdc686 JA |
20 | struct fio_file *f = io_u->file; |
| 21 | ||
| 87dc1ab1 JA |
22 | if (io_u->ddir == DDIR_SYNC) |
| 23 | return 0; | |
| 02bcaa8c JA |
24 | if (io_u->offset == f->last_completed_pos) |
| 25 | return 0; | |
| 87dc1ab1 | 26 | |
| 53cdc686 | 27 | if (lseek(f->fd, io_u->offset, SEEK_SET) == -1) { |
| e1161c32 | 28 | td_verror(td, errno, "lseek"); |
| 2866c82d JA |
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 | { | |
| 53cdc686 | 37 | struct fio_file *f = io_u->file; |
| cec6b55d | 38 | int ret; |
| 2866c82d | 39 | |
| 7101d9c2 JA |
40 | fio_ro_check(td, io_u); |
| 41 | ||
| a31041ea | 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 | |
| 87dc1ab1 | 53 | ret = fsync(f->fd); |
| 2866c82d | 54 | |
| cec6b55d | 55 | if (ret != (int) io_u->xfer_buflen) { |
| 22819ec2 | 56 | if (ret >= 0) { |
| cec6b55d JA |
57 | io_u->resid = io_u->xfer_buflen - ret; |
| 58 | io_u->error = 0; | |
| 36167d82 | 59 | return FIO_Q_COMPLETED; |
| 2866c82d JA |
60 | } else |
| 61 | io_u->error = errno; | |
| 62 | } | |
| 63 | ||
| 36167d82 | 64 | if (io_u->error) |
| e1161c32 | 65 | td_verror(td, io_u->error, "xfer"); |
| 2866c82d | 66 | |
| 36167d82 | 67 | return FIO_Q_COMPLETED; |
| 2866c82d JA |
68 | } |
| 69 | ||
| a31041ea | 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 = { | |
| 2866c82d JA |
77 | .name = "sync", |
| 78 | .version = FIO_IOOPS_VERSION, | |
| 2866c82d JA |
79 | .prep = fio_syncio_prep, |
| 80 | .queue = fio_syncio_queue, | |
| b5af8293 JA |
81 | .open_file = generic_open_file, |
| 82 | .close_file = generic_close_file, | |
| 2866c82d JA |
83 | .flags = FIO_SYNCIO, |
| 84 | }; | |
| 5f350952 | 85 | |
| a31041ea | 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 | ||
| 5f350952 JA |
96 | static void fio_init fio_syncio_register(void) |
| 97 | { | |
| a31041ea | 98 | register_ioengine(&ioengine_rw); |
| 99 | register_ioengine(&ioengine_prw); | |
| 5f350952 JA |
100 | } |
| 101 | ||
| 102 | static void fio_exit fio_syncio_unregister(void) | |
| 103 | { | |
| a31041ea | 104 | unregister_ioengine(&ioengine_rw); |
| 105 | unregister_ioengine(&ioengine_prw); | |
| 5f350952 | 106 | } |