projects / fio.git / blame
| Commit | Line | Data |
|---|---|---|
| 1216cc5a JB |
1 | /* |
| 2 | * filecreate engine | |
| 3 | * | |
| 4 | * IO engine that doesn't do any IO, just creates files and tracks the latency | |
| 5 | * of the file creation. | |
| 6 | */ | |
| 7 | #include <stdio.h> | |
| 8 | #include <unistd.h> | |
| 9 | #include <fcntl.h> | |
| 10 | #include <errno.h> | |
| 11 | ||
| 12 | #include "../fio.h" | |
| 13 | #include "../filehash.h" | |
| 14 | ||
| 15 | static int open_file(struct thread_data *td, struct fio_file *f) | |
| 16 | { | |
| 17 | struct timespec start, end; | |
| 18 | int from_hash = 0; | |
| 19 | int do_lat = !td->o.disable_lat; | |
| 20 | ||
| 21 | dprint(FD_FILE, "fd open %s\n", f->file_name); | |
| 22 | ||
| 23 | if (f->filetype != FIO_TYPE_FILE) { | |
| 24 | log_err("fio: only files are supported fallocate \n"); | |
| 25 | return 1; | |
| 26 | } | |
| 27 | if (!strcmp(f->file_name, "-")) { | |
| 28 | log_err("fio: can't read/write to stdin/out\n"); | |
| 29 | return 1; | |
| 30 | } | |
| 31 | ||
| 32 | open_again: | |
| 33 | if (do_lat) | |
| 34 | fio_gettime(&start, NULL); | |
| 35 | from_hash = file_lookup_open(f, O_CREAT|O_RDWR); | |
| 36 | if (do_lat) { | |
| 37 | unsigned long long nsec; | |
| 38 | ||
| 39 | fio_gettime(&end, NULL); | |
| 40 | nsec = ntime_since(&start, &end); | |
| 41 | add_lat_sample(td, DDIR_WRITE, nsec, 0, 0); | |
| 42 | } | |
| 43 | ||
| 44 | if (f->fd == -1) { | |
| 45 | char buf[FIO_VERROR_SIZE]; | |
| 46 | int e = errno; | |
| 47 | ||
| 48 | snprintf(buf, sizeof(buf), "open(%s)", f->file_name); | |
| 49 | td_verror(td, e, buf); | |
| 50 | } | |
| 51 | ||
| 52 | if (!from_hash && f->fd != -1) { | |
| 53 | if (add_file_hash(f)) { | |
| 54 | int fio_unused ret; | |
| 55 | ||
| 56 | /* | |
| 57 | * OK to ignore, we haven't done anything with it | |
| 58 | */ | |
| 59 | ret = generic_close_file(td, f); | |
| 60 | goto open_again; | |
| 61 | } | |
| 62 | } | |
| 63 | ||
| 64 | return 0; | |
| 65 | } | |
| 66 | ||
| 67 | static int queue_io(struct thread_data *td, struct io_u fio_unused *io_u) | |
| 68 | { | |
| 69 | return FIO_Q_COMPLETED; | |
| 70 | } | |
| 71 | ||
| edc5fa12 JA |
72 | /* |
| 73 | * Ensure that we at least have a block size worth of IO to do for each | |
| 74 | * file. If the job file has td->o.size < nr_files * block_size, then | |
| 75 | * fio won't do anything. | |
| 76 | */ | |
| 77 | static int get_file_size(struct thread_data *td, struct fio_file *f) | |
| 78 | { | |
| 79 | f->real_file_size = td_min_bs(td); | |
| 80 | return 0; | |
| 81 | } | |
| 82 | ||
| 1216cc5a JB |
83 | static struct ioengine_ops ioengine = { |
| 84 | .name = "filecreate", | |
| 85 | .version = FIO_IOOPS_VERSION, | |
| 1216cc5a | 86 | .queue = queue_io, |
| edc5fa12 JA |
87 | .get_file_size = get_file_size, |
| 88 | .open_file = open_file, | |
| 1216cc5a JB |
89 | .close_file = generic_close_file, |
| 90 | .flags = FIO_DISKLESSIO | FIO_SYNCIO | FIO_FAKEIO, | |
| 91 | }; | |
| 92 | ||
| 93 | static void fio_init fio_filecreate_register(void) | |
| 94 | { | |
| 95 | register_ioengine(&ioengine); | |
| 96 | } | |
| 97 | ||
| 98 | static void fio_exit fio_filecreate_unregister(void) | |
| 99 | { | |
| 100 | unregister_ioengine(&ioengine); | |
| 101 | } |