[fio.git] / engines / filedelete.c

/*
 * file delete engine
 *
 * IO engine that doesn't do any IO, just delete files and track the latency
 * of the file deletion.
 */
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <unistd.h>
#include "../fio.h"

struct fc_data {
	enum fio_ddir stat_ddir;
};

static int delete_file(struct thread_data *td, struct fio_file *f)
{
	struct timespec start;
	int do_lat = !td->o.disable_lat;
	int ret;

	dprint(FD_FILE, "fd delete %s\n", f->file_name);

	if (f->filetype != FIO_TYPE_FILE) {
		log_err("fio: only files are supported\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);

	ret = unlink(f->file_name);

	if (ret == -1) {
		char buf[FIO_VERROR_SIZE];
		int e = errno;

		snprintf(buf, sizeof(buf), "delete(%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, 0, false);
	}

	return 0;
}


static enum fio_q_status queue_io(struct thread_data *td, struct io_u fio_unused *io_u)
{
	return FIO_Q_COMPLETED;
}

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 int delete_invalidate(struct thread_data *td, struct fio_file *f)
{
    /* do nothing because file not opened */
    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		= "filedelete",
	.version	= FIO_IOOPS_VERSION,
	.init		= init,
	.invalidate	= delete_invalidate,
	.cleanup	= cleanup,
	.queue		= queue_io,
	.get_file_size	= generic_get_file_size,
	.open_file	= delete_file,
	.flags		=  FIO_SYNCIO | FIO_FAKEIO |
				FIO_NOSTATS | FIO_NOFILEHASH,
};

static void fio_init fio_filedelete_register(void)
{
	register_ioengine(&ioengine);
}

static void fio_exit fio_filedelete_unregister(void)
{
	unregister_ioengine(&ioengine);
}
Commit	Line	Data
5561e9dd FS	1	/*
	2	* file delete engine
	3	*
	4	* IO engine that doesn't do any IO, just delete files and track the latency
	5	* of the file deletion.
	6	*/
	7	#include <stdio.h>
	8	#include <fcntl.h>
	9	#include <errno.h>
	10	#include <sys/types.h>
	11	#include <unistd.h>
	12	#include "../fio.h"
	13
	14	struct fc_data {
	15	enum fio_ddir stat_ddir;
	16	};
	17
	18	static int delete_file(struct thread_data td, struct fio_file f)
	19	{
	20	struct timespec start;
	21	int do_lat = !td->o.disable_lat;
	22	int ret;
	23
	24	dprint(FD_FILE, "fd delete %s\n", f->file_name);
	25
	26	if (f->filetype != FIO_TYPE_FILE) {
	27	log_err("fio: only files are supported\n");
	28	return 1;
	29	}
	30	if (!strcmp(f->file_name, "-")) {
	31	log_err("fio: can't read/write to stdin/out\n");
	32	return 1;
	33	}
	34
	35	if (do_lat)
	36	fio_gettime(&start, NULL);
	37
	38	ret = unlink(f->file_name);
	39
	40	if (ret == -1) {
	41	char buf[FIO_VERROR_SIZE];
	42	int e = errno;
	43
	44	snprintf(buf, sizeof(buf), "delete(%s)", f->file_name);
	45	td_verror(td, e, buf);
	46	return 1;
	47	}
	48
	49	if (do_lat) {
	50	struct fc_data *data = td->io_ops_data;
	51	uint64_t nsec;
	52
	53	nsec = ntime_since_now(&start);
03ec570f	54	add_clat_sample(td, data->stat_ddir, nsec, 0, 0, 0, false);
5561e9dd FS	55	}
	56
	57	return 0;
	58	}
	59
	60
	61	static enum fio_q_status queue_io(struct thread_data td, struct io_u fio_unused io_u)
	62	{
	63	return FIO_Q_COMPLETED;
	64	}
	65
	66	static int init(struct thread_data *td)
	67	{
	68	struct fc_data *data;
	69
	70	data = calloc(1, sizeof(*data));
	71
	72	if (td_read(td))
	73	data->stat_ddir = DDIR_READ;
	74	else if (td_write(td))
	75	data->stat_ddir = DDIR_WRITE;
	76
	77	td->io_ops_data = data;
	78	return 0;
	79	}
	80
	81	static int delete_invalidate(struct thread_data td, struct fio_file f)
	82	{
	83	/* do nothing because file not opened */
	84	return 0;
	85	}
	86
	87	static void cleanup(struct thread_data *td)
	88	{
	89	struct fc_data *data = td->io_ops_data;
	90
	91	free(data);
	92	}
	93
	94	static struct ioengine_ops ioengine = {
	95	.name = "filedelete",
	96	.version = FIO_IOOPS_VERSION,
	97	.init = init,
	98	.invalidate = delete_invalidate,
	99	.cleanup = cleanup,
	100	.queue = queue_io,
	101	.get_file_size = generic_get_file_size,
	102	.open_file = delete_file,
	103	.flags = FIO_SYNCIO \| FIO_FAKEIO \|
	104	FIO_NOSTATS \| FIO_NOFILEHASH,
	105	};
	106
	107	static void fio_init fio_filedelete_register(void)
	108	{
	109	register_ioengine(&ioengine);
	110	}
	111
	112	static void fio_exit fio_filedelete_unregister(void)
	113	{
	114	unregister_ioengine(&ioengine);
	115	}