| /* |
| * falloc: ioengine for git://git.kernel.dk/fio.git |
| * |
| * IO engine that does regular fallocate to simulate data transfer |
| * as fio ioengine. |
| * DDIR_READ does fallocate(,mode = FALLOC_FL_KEEP_SIZE,) |
| * DDIR_WRITE does fallocate(,mode = 0) : fallocate with size extention |
| * DDIR_TRIM does fallocate(,mode = FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE) |
| * |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <sys/uio.h> |
| #include <errno.h> |
| #include <assert.h> |
| #include <fcntl.h> |
| |
| #include "../fio.h" |
| #include "../filehash.h" |
| |
| /* |
| * generic_open_file is not appropriate because does not allow to perform |
| * TRIM in to file |
| */ |
| int open_file(struct thread_data *td, struct fio_file *f) |
| { |
| int from_hash = 0; |
| |
| 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; |
| } |
| |
| open_again: |
| from_hash = file_lookup_open(f, O_CREAT|O_RDWR); |
| |
| if (f->fd == -1) { |
| char buf[FIO_VERROR_SIZE]; |
| int __e = errno; |
| snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name); |
| td_verror(td, __e, buf); |
| } |
| |
| if (!from_hash && f->fd != -1) { |
| if (add_file_hash(f)) { |
| int fio_unused ret; |
| |
| /* |
| * OK to ignore, we haven't done anything with it |
| */ |
| ret = generic_close_file(td, f); |
| goto open_again; |
| } |
| } |
| |
| return 0; |
| } |
| |
| #ifndef FALLOC_FL_KEEP_SIZE |
| #define FALLOC_FL_KEEP_SIZE 0x01 /* default is extend size */ |
| #endif |
| #ifndef FALLOC_FL_PUNCH_HOLE |
| #define FALLOC_FL_PUNCH_HOLE 0x02 /* de-allocates range */ |
| #endif |
| static int fio_fallocate_queue(struct thread_data *td, struct io_u *io_u) |
| { |
| struct fio_file *f = io_u->file; |
| int ret; |
| int flags = 0; |
| |
| fio_ro_check(td, io_u); |
| |
| if (io_u->ddir == DDIR_READ) |
| flags = FALLOC_FL_KEEP_SIZE; |
| else if (io_u->ddir == DDIR_WRITE) |
| flags = 0; |
| else if (io_u->ddir == DDIR_TRIM) |
| flags = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; |
| |
| ret = fallocate(f->fd, flags, io_u->offset, io_u->xfer_buflen); |
| |
| if (ret) |
| io_u->error = errno; |
| |
| if (io_u->file && ret == 0 && ddir_rw(io_u->ddir)) |
| io_u->file->file_pos = io_u->offset + ret; |
| |
| return FIO_Q_COMPLETED; |
| } |
| |
| static struct ioengine_ops ioengine = { |
| .name = "falloc", |
| .version = FIO_IOOPS_VERSION, |
| .queue = fio_fallocate_queue, |
| .open_file = open_file, |
| .close_file = generic_close_file, |
| .get_file_size = generic_get_file_size, |
| .flags = FIO_SYNCIO |
| }; |
| |
| static void fio_init fio_syncio_register(void) |
| { |
| register_ioengine(&ioengine); |
| } |
| |
| static void fio_exit fio_syncio_unregister(void) |
| { |
| unregister_ioengine(&ioengine); |
| } |