[fio.git] / engines / falloc.c

/*
 * 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 extension
 * DDIR_TRIM  does fallocate(,mode = FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)
 *
 */
#include <stdio.h>
#include <errno.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
 */
static 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 && f->filetype != FIO_TYPE_BLOCK) {
		log_err("fio: only files and blockdev 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), "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 enum fio_q_status 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;

	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);
}
Commit	Line	Data
e615ceaf DM	1	/*
	2	* falloc: ioengine for git://git.kernel.dk/fio.git
	3	*
	4	* IO engine that does regular fallocate to simulate data transfer
	5	* as fio ioengine.
	6	* DDIR_READ does fallocate(,mode = FALLOC_FL_KEEP_SIZE,)
de8f6de9	7	* DDIR_WRITE does fallocate(,mode = 0) : fallocate with size extension
e615ceaf DM	8	* DDIR_TRIM does fallocate(,mode = FALLOC_FL_KEEP_SIZE \| FALLOC_FL_PUNCH_HOLE)
	9	*
	10	*/
	11	#include <stdio.h>
e615ceaf	12	#include <errno.h>
e615ceaf DM	13	#include <fcntl.h>
	14
	15	#include "../fio.h"
	16	#include "../filehash.h"
	17
	18	/*
	19	* generic_open_file is not appropriate because does not allow to perform
	20	* TRIM in to file
	21	*/
10aa136b	22	static int open_file(struct thread_data td, struct fio_file f)
e615ceaf DM	23	{
	24	int from_hash = 0;
	25
	26	dprint(FD_FILE, "fd open %s\n", f->file_name);
	27
dcfc77d3 DM	28	if (f->filetype != FIO_TYPE_FILE && f->filetype != FIO_TYPE_BLOCK) {
dcfc77d3 DM	29	log_err("fio: only files and blockdev are supported fallocate \n");
e615ceaf DM	30	return 1;
	31	}
	32	if (!strcmp(f->file_name, "-")) {
	33	log_err("fio: can't read/write to stdin/out\n");
	34	return 1;
	35	}
	36
	37	open_again:
	38	from_hash = file_lookup_open(f, O_CREAT\|O_RDWR);
	39
	40	if (f->fd == -1) {
	41	char buf[FIO_VERROR_SIZE];
0b783341 JA	42	int e = errno;
0b783341 JA	43
98ffb8f3	44	snprintf(buf, sizeof(buf), "open(%s)", f->file_name);
0b783341	45	td_verror(td, e, buf);
e615ceaf DM	46	}
	47
	48	if (!from_hash && f->fd != -1) {
	49	if (add_file_hash(f)) {
	50	int fio_unused ret;
	51
	52	/*
	53	* OK to ignore, we haven't done anything with it
	54	*/
	55	ret = generic_close_file(td, f);
	56	goto open_again;
	57	}
	58	}
	59
	60	return 0;
	61	}
	62
	63	#ifndef FALLOC_FL_KEEP_SIZE
	64	#define FALLOC_FL_KEEP_SIZE 0x01 /* default is extend size */
	65	#endif
	66	#ifndef FALLOC_FL_PUNCH_HOLE
	67	#define FALLOC_FL_PUNCH_HOLE 0x02 /* de-allocates range */
2e4ef4fb JA	68	#endif
	69
	70	static enum fio_q_status fio_fallocate_queue(struct thread_data *td,
	71	struct io_u *io_u)
e615ceaf DM	72	{
	73	struct fio_file *f = io_u->file;
	74	int ret;
	75	int flags = 0;
	76
	77	fio_ro_check(td, io_u);
	78
	79	if (io_u->ddir == DDIR_READ)
	80	flags = FALLOC_FL_KEEP_SIZE;
	81	else if (io_u->ddir == DDIR_WRITE)
	82	flags = 0;
	83	else if (io_u->ddir == DDIR_TRIM)
	84	flags = FALLOC_FL_PUNCH_HOLE \| FALLOC_FL_KEEP_SIZE;
	85
	86	ret = fallocate(f->fd, flags, io_u->offset, io_u->xfer_buflen);
	87
e12d2800	88	if (ret)
e615ceaf	89	io_u->error = errno;
e615ceaf	90
e615ceaf DM	91	return FIO_Q_COMPLETED;
	92	}
	93
	94	static struct ioengine_ops ioengine = {
	95	.name = "falloc",
	96	.version = FIO_IOOPS_VERSION,
	97	.queue = fio_fallocate_queue,
	98	.open_file = open_file,
	99	.close_file = generic_close_file,
	100	.get_file_size = generic_get_file_size,
	101	.flags = FIO_SYNCIO
	102	};
	103
	104	static void fio_init fio_syncio_register(void)
	105	{
	106	register_ioengine(&ioengine);
	107	}
	108
	109	static void fio_exit fio_syncio_unregister(void)
	110	{
	111	unregister_ioengine(&ioengine);
	112	}