| /* |
| * filecreate engine |
| * |
| * IO engine that doesn't do any IO, just creates files and tracks the latency |
| * of the file creation. |
| */ |
| #include <stdio.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| |
| #include "../fio.h" |
| |
| struct fc_data { |
| enum fio_ddir stat_ddir; |
| }; |
| |
| static int open_file(struct thread_data *td, struct fio_file *f) |
| { |
| struct timespec start; |
| int do_lat = !td->o.disable_lat; |
| |
| dprint(FD_FILE, "fd open %s\n", f->file_name); |
| |
| if (f->filetype != FIO_TYPE_FILE) { |
| log_err("fio: only files are supported fallocate \n"); |
| return 1; |
| } |
| if (!strcmp(f->file_name, "-")) { |
| log_err("fio: can't read/write to stdin/out\n"); |
| return 1; |
| } |
| |
| if (do_lat) |
| fio_gettime(&start, NULL); |
| |
| f->fd = open(f->file_name, O_CREAT|O_RDWR, 0600); |
| |
| if (f->fd == -1) { |
| char buf[FIO_VERROR_SIZE]; |
| int e = errno; |
| |
| snprintf(buf, sizeof(buf), "open(%s)", f->file_name); |
| td_verror(td, e, buf); |
| return 1; |
| } |
| |
| if (do_lat) { |
| struct fc_data *data = td->io_ops_data; |
| uint64_t nsec; |
| |
| nsec = ntime_since_now(&start); |
| add_clat_sample(td, data->stat_ddir, nsec, 0, 0); |
| } |
| |
| return 0; |
| } |
| |
| static enum fio_q_status queue_io(struct thread_data *td, |
| struct io_u fio_unused *io_u) |
| { |
| return FIO_Q_COMPLETED; |
| } |
| |
| /* |
| * Ensure that we at least have a block size worth of IO to do for each |
| * file. If the job file has td->o.size < nr_files * block_size, then |
| * fio won't do anything. |
| */ |
| static int get_file_size(struct thread_data *td, struct fio_file *f) |
| { |
| f->real_file_size = td_min_bs(td); |
| return 0; |
| } |
| |
| static int init(struct thread_data *td) |
| { |
| struct fc_data *data; |
| |
| data = calloc(1, sizeof(*data)); |
| |
| if (td_read(td)) |
| data->stat_ddir = DDIR_READ; |
| else if (td_write(td)) |
| data->stat_ddir = DDIR_WRITE; |
| |
| td->io_ops_data = data; |
| return 0; |
| } |
| |
| static void cleanup(struct thread_data *td) |
| { |
| struct fc_data *data = td->io_ops_data; |
| |
| free(data); |
| } |
| |
| static struct ioengine_ops ioengine = { |
| .name = "filecreate", |
| .version = FIO_IOOPS_VERSION, |
| .init = init, |
| .cleanup = cleanup, |
| .queue = queue_io, |
| .get_file_size = get_file_size, |
| .open_file = open_file, |
| .close_file = generic_close_file, |
| .flags = FIO_DISKLESSIO | FIO_SYNCIO | FIO_FAKEIO | |
| FIO_NOSTATS | FIO_NOFILEHASH, |
| }; |
| |
| static void fio_init fio_filecreate_register(void) |
| { |
| register_ioengine(&ioengine); |
| } |
| |
| static void fio_exit fio_filecreate_unregister(void) |
| { |
| unregister_ioengine(&ioengine); |
| } |