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 | { | |
0410e783 | 17 | struct timespec start; |
1216cc5a JB |
18 | int do_lat = !td->o.disable_lat; |
19 | ||
20 | dprint(FD_FILE, "fd open %s\n", f->file_name); | |
21 | ||
22 | if (f->filetype != FIO_TYPE_FILE) { | |
23 | log_err("fio: only files are supported fallocate \n"); | |
24 | return 1; | |
25 | } | |
26 | if (!strcmp(f->file_name, "-")) { | |
27 | log_err("fio: can't read/write to stdin/out\n"); | |
28 | return 1; | |
29 | } | |
30 | ||
1216cc5a JB |
31 | if (do_lat) |
32 | fio_gettime(&start, NULL); | |
1216cc5a | 33 | |
52582166 | 34 | f->fd = open(f->file_name, O_CREAT|O_RDWR, 0600); |
1216cc5a JB |
35 | |
36 | if (f->fd == -1) { | |
37 | char buf[FIO_VERROR_SIZE]; | |
38 | int e = errno; | |
39 | ||
40 | snprintf(buf, sizeof(buf), "open(%s)", f->file_name); | |
41 | td_verror(td, e, buf); | |
52582166 | 42 | return 1; |
1216cc5a JB |
43 | } |
44 | ||
52582166 | 45 | if (do_lat) { |
0410e783 | 46 | uint64_t nsec; |
1216cc5a | 47 | |
0410e783 | 48 | nsec = ntime_since_now(&start); |
52582166 | 49 | add_lat_sample(td, DDIR_WRITE, nsec, 0, 0); |
1216cc5a JB |
50 | } |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
55 | static int queue_io(struct thread_data *td, struct io_u fio_unused *io_u) | |
56 | { | |
57 | return FIO_Q_COMPLETED; | |
58 | } | |
59 | ||
edc5fa12 JA |
60 | /* |
61 | * Ensure that we at least have a block size worth of IO to do for each | |
62 | * file. If the job file has td->o.size < nr_files * block_size, then | |
63 | * fio won't do anything. | |
64 | */ | |
65 | static int get_file_size(struct thread_data *td, struct fio_file *f) | |
66 | { | |
67 | f->real_file_size = td_min_bs(td); | |
68 | return 0; | |
69 | } | |
70 | ||
1216cc5a JB |
71 | static struct ioengine_ops ioengine = { |
72 | .name = "filecreate", | |
73 | .version = FIO_IOOPS_VERSION, | |
1216cc5a | 74 | .queue = queue_io, |
edc5fa12 JA |
75 | .get_file_size = get_file_size, |
76 | .open_file = open_file, | |
1216cc5a | 77 | .close_file = generic_close_file, |
132b1ee4 JA |
78 | .flags = FIO_DISKLESSIO | FIO_SYNCIO | FIO_FAKEIO | |
79 | FIO_NOSTATS, | |
1216cc5a JB |
80 | }; |
81 | ||
82 | static void fio_init fio_filecreate_register(void) | |
83 | { | |
84 | register_ioengine(&ioengine); | |
85 | } | |
86 | ||
87 | static void fio_exit fio_filecreate_unregister(void) | |
88 | { | |
89 | unregister_ioengine(&ioengine); | |
90 | } |