[fio.git] / ioengines.c

/*
 * The io parts of the fio tool, includes workers for sync and mmap'ed
 * io, as well as both posix and linux libaio support.
 *
 * sync io is implemented on top of aio.
 *
 * This is not really specific to fio, if the get_io_u/put_io_u and
 * structures was pulled into this as well it would be a perfectly
 * generic io engine that could be used for other projects.
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <dlfcn.h>
#include <fcntl.h>
#include <assert.h>

#include "fio.h"
#include "diskutil.h"

static FLIST_HEAD(engine_list);

static int check_engine_ops(struct ioengine_ops *ops)
{
	if (ops->version != FIO_IOOPS_VERSION) {
		log_err("bad ioops version %d (want %d)\n", ops->version,
							FIO_IOOPS_VERSION);
		return 1;
	}

	if (!ops->queue) {
		log_err("%s: no queue handler\n", ops->name);
		return 1;
	}

	/*
	 * sync engines only need a ->queue()
	 */
	if (ops->flags & FIO_SYNCIO)
		return 0;

	if (!ops->event) {
		log_err("%s: no event handler\n", ops->name);
		return 1;
	}
	if (!ops->getevents) {
		log_err("%s: no getevents handler\n", ops->name);
		return 1;
	}
	if (!ops->queue) {
		log_err("%s: no queue handler\n", ops->name);
		return 1;
	}

	return 0;
}

void unregister_ioengine(struct ioengine_ops *ops)
{
	dprint(FD_IO, "ioengine %s unregistered\n", ops->name);
	flist_del(&ops->list);
	INIT_FLIST_HEAD(&ops->list);
}

void register_ioengine(struct ioengine_ops *ops)
{
	dprint(FD_IO, "ioengine %s registered\n", ops->name);
	INIT_FLIST_HEAD(&ops->list);
	flist_add_tail(&ops->list, &engine_list);
}

static struct ioengine_ops *find_ioengine(const char *name)
{
	struct ioengine_ops *ops;
	struct flist_head *entry;

	flist_for_each(entry, &engine_list) {
		ops = flist_entry(entry, struct ioengine_ops, list);
		if (!strcmp(name, ops->name))
			return ops;
	}

	return NULL;
}

static struct ioengine_ops *dlopen_ioengine(struct thread_data *td,
					    const char *engine_lib)
{
	struct ioengine_ops *ops;
	void *dlhandle;

	dprint(FD_IO, "dload engine %s\n", engine_lib);

	dlerror();
	dlhandle = dlopen(engine_lib, RTLD_LAZY);
	if (!dlhandle) {
		td_vmsg(td, -1, dlerror(), "dlopen");
		return NULL;
	}

	/*
	 * Unlike the included modules, external engines should have a
	 * non-static ioengine structure that we can reference.
	 */
	ops = dlsym(dlhandle, "ioengine");
	if (!ops) {
		td_vmsg(td, -1, dlerror(), "dlsym");
		dlclose(dlhandle);
		return NULL;
	}

	ops->dlhandle = dlhandle;
	return ops;
}

struct ioengine_ops *load_ioengine(struct thread_data *td, const char *name)
{
	struct ioengine_ops *ops, *ret;
	char engine[16];

	dprint(FD_IO, "load ioengine %s\n", name);

	strncpy(engine, name, sizeof(engine) - 1);

	/*
	 * linux libaio has alias names, so convert to what we want
	 */
	if (!strncmp(engine, "linuxaio", 8) || !strncmp(engine, "aio", 3))
		strcpy(engine, "libaio");

	ops = find_ioengine(engine);
	if (!ops)
		ops = dlopen_ioengine(td, name);

	if (!ops) {
		log_err("fio: engine %s not loadable\n", name);
		return NULL;
	}

	/*
	 * Check that the required methods are there.
	 */
	if (check_engine_ops(ops))
		return NULL;

	ret = malloc(sizeof(*ret));
	memcpy(ret, ops, sizeof(*ret));
	ret->data = NULL;

	return ret;
}

void close_ioengine(struct thread_data *td)
{
	dprint(FD_IO, "close ioengine %s\n", td->io_ops->name);

	if (td->io_ops->cleanup) {
		td->io_ops->cleanup(td);
		td->io_ops->data = NULL;
	}

	if (td->io_ops->dlhandle)
		dlclose(td->io_ops->dlhandle);

	free(td->io_ops);
	td->io_ops = NULL;
}

int td_io_prep(struct thread_data *td, struct io_u *io_u)
{
	dprint_io_u(io_u, "prep");
	fio_ro_check(td, io_u);

	lock_file(td, io_u->file, io_u->ddir);

	if (td->io_ops->prep) {
		int ret = td->io_ops->prep(td, io_u);

		dprint(FD_IO, "->prep(%p)=%d\n", io_u, ret);
		if (ret)
			unlock_file(td, io_u->file);
		return ret;
	}

	return 0;
}

int td_io_getevents(struct thread_data *td, unsigned int min, unsigned int max,
		    struct timespec *t)
{
	int r = 0;

	if (min > 0 && td->io_ops->commit) {
		r = td->io_ops->commit(td);
		if (r < 0)
			goto out;
	}
	if (max > td->cur_depth)
		max = td->cur_depth;
	if (min > max)
		max = min;

	r = 0;
	if (max && td->io_ops->getevents)
		r = td->io_ops->getevents(td, min, max, t);
out:
	if (r >= 0)
		io_u_mark_complete(td, r);
	else
		td_verror(td, r, "get_events");

	dprint(FD_IO, "getevents: %d\n", r);
	return r;
}

int td_io_queue(struct thread_data *td, struct io_u *io_u)
{
	int ret;

	dprint_io_u(io_u, "queue");
	fio_ro_check(td, io_u);

	assert((io_u->flags & IO_U_F_FLIGHT) == 0);
	io_u->flags |= IO_U_F_FLIGHT;

	assert(fio_file_open(io_u->file));

	io_u->error = 0;
	io_u->resid = 0;

	if (td->io_ops->flags & FIO_SYNCIO) {
		if (fio_fill_issue_time(td))
			fio_gettime(&io_u->issue_time, NULL);

		/*
		 * only used for iolog
		 */
		if (td->o.read_iolog_file)
			memcpy(&td->last_issue, &io_u->issue_time,
					sizeof(struct timeval));
	}

	if (ddir_rw(io_u->ddir))
		td->io_issues[io_u->ddir]++;

	ret = td->io_ops->queue(td, io_u);

	unlock_file(td, io_u->file);

	/*
	 * Add warning for O_DIRECT so that users have an easier time
	 * spotting potentially bad alignment. If this triggers for the first
	 * IO, then it's likely an alignment problem or because the host fs
	 * does not support O_DIRECT
	 */
	if (io_u->error == EINVAL && td->io_issues[io_u->ddir & 1] == 1 &&
	    td->o.odirect) {
		log_info("fio: first direct IO errored. File system may not "
			 "support direct IO, or iomem_align= is bad.\n");
	}

	if (!td->io_ops->commit) {
		io_u_mark_submit(td, 1);
		io_u_mark_complete(td, 1);
	}

	if (ret == FIO_Q_COMPLETED) {
		if (ddir_rw(io_u->ddir)) {
			io_u_mark_depth(td, 1);
			td->ts.total_io_u[io_u->ddir]++;
		} else if (io_u->ddir == DDIR_TRIM)
			td->ts.total_io_u[2]++;
	} else if (ret == FIO_Q_QUEUED) {
		int r;

		if (ddir_rw(io_u->ddir)) {
			td->io_u_queued++;
			td->ts.total_io_u[io_u->ddir]++;
		}

		if (td->io_u_queued >= td->o.iodepth_batch) {
			r = td_io_commit(td);
			if (r < 0)
				return r;
		}
	}

	if ((td->io_ops->flags & FIO_SYNCIO) == 0) {
		if (fio_fill_issue_time(td))
			fio_gettime(&io_u->issue_time, NULL);

		/*
		 * only used for iolog
		 */
		if (td->o.read_iolog_file)
			memcpy(&td->last_issue, &io_u->issue_time,
					sizeof(struct timeval));
	}

	return ret;
}

int td_io_init(struct thread_data *td)
{
	int ret = 0;

	if (td->io_ops->init) {
		ret = td->io_ops->init(td);
		if (ret && td->o.iodepth > 1) {
			log_err("fio: io engine init failed. Perhaps try"
				" reducing io depth?\n");
		}
	}

	return ret;
}

int td_io_commit(struct thread_data *td)
{
	int ret;

	dprint(FD_IO, "calling ->commit(), depth %d\n", td->cur_depth);

	if (!td->cur_depth || !td->io_u_queued)
		return 0;

	io_u_mark_depth(td, td->io_u_queued);
	td->io_u_queued = 0;

	if (td->io_ops->commit) {
		ret = td->io_ops->commit(td);
		if (ret)
			td_verror(td, -ret, "io commit");
	}

	return 0;
}

int td_io_open_file(struct thread_data *td, struct fio_file *f)
{
	assert(!fio_file_open(f));
	assert(f->fd == -1);

	if (td->io_ops->open_file(td, f)) {
		if (td->error == EINVAL && td->o.odirect)
			log_err("fio: destination does not support O_DIRECT\n");
		if (td->error == EMFILE) {
			log_err("fio: try reducing/setting openfiles (failed"
				" at %u of %u)\n", td->nr_open_files,
							td->o.nr_files);
		}

		assert(f->fd == -1);
		assert(!fio_file_open(f));
		return 1;
	}

	fio_file_reset(f);
	fio_file_set_open(f);
	fio_file_clear_closing(f);
	disk_util_inc(f->du);

	td->nr_open_files++;
	get_file(f);

	if (f->filetype == FIO_TYPE_PIPE) {
		if (td_random(td)) {
			log_err("fio: can't seek on pipes (no random io)\n");
			goto err;
		}
	}

	if (td->io_ops->flags & FIO_DISKLESSIO)
		goto done;

	if (td->o.invalidate_cache && file_invalidate_cache(td, f))
		goto err;

	if (td->o.fadvise_hint &&
	    (f->filetype == FIO_TYPE_BD || f->filetype == FIO_TYPE_FILE)) {
		int flags;

		if (td_random(td))
			flags = POSIX_FADV_RANDOM;
		else
			flags = POSIX_FADV_SEQUENTIAL;

		if (posix_fadvise(f->fd, f->file_offset, f->io_size, flags) < 0) {
			td_verror(td, errno, "fadvise");
			goto err;
		}
	}

#ifdef FIO_OS_DIRECTIO
	/*
	 * Some OS's have a distinct call to mark the file non-buffered,
	 * instead of using O_DIRECT (Solaris)
	 */
	if (td->o.odirect) {
		int ret = fio_set_odirect(f->fd);

		if (ret) {
			td_verror(td, ret, "fio_set_odirect");
			log_err("fio: the file system does not seem to support direct IO\n");
			goto err;
		}
	}
#endif

done:
	log_file(td, f, FIO_LOG_OPEN_FILE);
	return 0;
err:
	disk_util_dec(f->du);
	if (td->io_ops->close_file)
		td->io_ops->close_file(td, f);
	return 1;
}

int td_io_close_file(struct thread_data *td, struct fio_file *f)
{
	if (!fio_file_closing(f))
		log_file(td, f, FIO_LOG_CLOSE_FILE);

	/*
	 * mark as closing, do real close when last io on it has completed
	 */
	fio_file_set_closing(f);

	disk_util_dec(f->du);
	unlock_file_all(td, f);

	return put_file(td, f);
}

int td_io_get_file_size(struct thread_data *td, struct fio_file *f)
{
	if (!td->io_ops->get_file_size)
		return 0;

	return td->io_ops->get_file_size(td, f);
}

static int do_sync_file_range(struct thread_data *td, struct fio_file *f)
{
	off64_t offset, nbytes;

	offset = f->first_write;
	nbytes = f->last_write - f->first_write;

	if (!nbytes)
		return 0;

	return sync_file_range(f->fd, offset, nbytes, td->o.sync_file_range);
}

int do_io_u_sync(struct thread_data *td, struct io_u *io_u)
{
	int ret;

	if (io_u->ddir == DDIR_SYNC) {
		ret = fsync(io_u->file->fd);
	} else if (io_u->ddir == DDIR_DATASYNC) {
#ifdef FIO_HAVE_FDATASYNC
		ret = fdatasync(io_u->file->fd);
#else
		ret = io_u->xfer_buflen;
		io_u->error = EINVAL;
#endif
	} else if (io_u->ddir == DDIR_SYNC_FILE_RANGE)
		ret = do_sync_file_range(td, io_u->file);
	else {
		ret = io_u->xfer_buflen;
		io_u->error = EINVAL;
	}

	if (ret < 0)
		io_u->error = errno;

	return ret;
}

int do_io_u_trim(struct thread_data *td, struct io_u *io_u)
{
#ifndef FIO_HAVE_TRIM
	io_u->error = EINVAL;
	return 0;
#else
	struct fio_file *f = io_u->file;
	int ret;

	ret = os_trim(f->fd, io_u->offset, io_u->xfer_buflen);
	if (!ret)
		return io_u->xfer_buflen;;

	io_u->error = ret;
	return 0;
#endif
}
Commit	Line	Data
	1	/*
	2	* The io parts of the fio tool, includes workers for sync and mmap'ed
	3	* io, as well as both posix and linux libaio support.
	4	*
	5	* sync io is implemented on top of aio.
	6	*
	7	* This is not really specific to fio, if the get_io_u/put_io_u and
	8	* structures was pulled into this as well it would be a perfectly
	9	* generic io engine that could be used for other projects.
	10	*
	11	*/
	12	#include <stdio.h>
	13	#include <stdlib.h>
	14	#include <unistd.h>
	15	#include <string.h>
	16	#include <dlfcn.h>
	17	#include <fcntl.h>
	18	#include <assert.h>
	19
	20	#include "fio.h"
	21	#include "diskutil.h"
	22
	23	static FLIST_HEAD(engine_list);
	24
	25	static int check_engine_ops(struct ioengine_ops *ops)
	26	{
	27	if (ops->version != FIO_IOOPS_VERSION) {
	28	log_err("bad ioops version %d (want %d)\n", ops->version,
	29	FIO_IOOPS_VERSION);
	30	return 1;
	31	}
	32
	33	if (!ops->queue) {
	34	log_err("%s: no queue handler\n", ops->name);
	35	return 1;
	36	}
	37
	38	/*
	39	* sync engines only need a ->queue()
	40	*/
	41	if (ops->flags & FIO_SYNCIO)
	42	return 0;
	43
	44	if (!ops->event) {
	45	log_err("%s: no event handler\n", ops->name);
	46	return 1;
	47	}
	48	if (!ops->getevents) {
	49	log_err("%s: no getevents handler\n", ops->name);
	50	return 1;
	51	}
	52	if (!ops->queue) {
	53	log_err("%s: no queue handler\n", ops->name);
	54	return 1;
	55	}
	56
	57	return 0;
	58	}
	59
	60	void unregister_ioengine(struct ioengine_ops *ops)
	61	{
	62	dprint(FD_IO, "ioengine %s unregistered\n", ops->name);
	63	flist_del(&ops->list);
	64	INIT_FLIST_HEAD(&ops->list);
	65	}
	66
	67	void register_ioengine(struct ioengine_ops *ops)
	68	{
	69	dprint(FD_IO, "ioengine %s registered\n", ops->name);
	70	INIT_FLIST_HEAD(&ops->list);
	71	flist_add_tail(&ops->list, &engine_list);
	72	}
	73
	74	static struct ioengine_ops find_ioengine(const char name)
	75	{
	76	struct ioengine_ops *ops;
	77	struct flist_head *entry;
	78
	79	flist_for_each(entry, &engine_list) {
	80	ops = flist_entry(entry, struct ioengine_ops, list);
	81	if (!strcmp(name, ops->name))
	82	return ops;
	83	}
	84
	85	return NULL;
	86	}
	87
	88	static struct ioengine_ops dlopen_ioengine(struct thread_data td,
	89	const char *engine_lib)
	90	{
	91	struct ioengine_ops *ops;
	92	void *dlhandle;
	93
	94	dprint(FD_IO, "dload engine %s\n", engine_lib);
	95
	96	dlerror();
	97	dlhandle = dlopen(engine_lib, RTLD_LAZY);
	98	if (!dlhandle) {
	99	td_vmsg(td, -1, dlerror(), "dlopen");
	100	return NULL;
	101	}
	102
	103	/*
	104	* Unlike the included modules, external engines should have a
	105	* non-static ioengine structure that we can reference.
	106	*/
	107	ops = dlsym(dlhandle, "ioengine");
	108	if (!ops) {
	109	td_vmsg(td, -1, dlerror(), "dlsym");
	110	dlclose(dlhandle);
	111	return NULL;
	112	}
	113
	114	ops->dlhandle = dlhandle;
	115	return ops;
	116	}
	117
	118	struct ioengine_ops load_ioengine(struct thread_data td, const char *name)
	119	{
	120	struct ioengine_ops ops, ret;
	121	char engine[16];
	122
	123	dprint(FD_IO, "load ioengine %s\n", name);
	124
	125	strncpy(engine, name, sizeof(engine) - 1);
	126
	127	/*
	128	* linux libaio has alias names, so convert to what we want
	129	*/
	130	if (!strncmp(engine, "linuxaio", 8) \|\| !strncmp(engine, "aio", 3))
	131	strcpy(engine, "libaio");
	132
	133	ops = find_ioengine(engine);
	134	if (!ops)
	135	ops = dlopen_ioengine(td, name);
	136
	137	if (!ops) {
	138	log_err("fio: engine %s not loadable\n", name);
	139	return NULL;
	140	}
	141
	142	/*
	143	* Check that the required methods are there.
	144	*/
	145	if (check_engine_ops(ops))
	146	return NULL;
	147
	148	ret = malloc(sizeof(*ret));
	149	memcpy(ret, ops, sizeof(*ret));
	150	ret->data = NULL;
	151
	152	return ret;
	153	}
	154
	155	void close_ioengine(struct thread_data *td)
	156	{
	157	dprint(FD_IO, "close ioengine %s\n", td->io_ops->name);
	158
	159	if (td->io_ops->cleanup) {
	160	td->io_ops->cleanup(td);
	161	td->io_ops->data = NULL;
	162	}
	163
	164	if (td->io_ops->dlhandle)
	165	dlclose(td->io_ops->dlhandle);
	166
	167	free(td->io_ops);
	168	td->io_ops = NULL;
	169	}
	170
	171	int td_io_prep(struct thread_data td, struct io_u io_u)
	172	{
	173	dprint_io_u(io_u, "prep");
	174	fio_ro_check(td, io_u);
	175
	176	lock_file(td, io_u->file, io_u->ddir);
	177
	178	if (td->io_ops->prep) {
	179	int ret = td->io_ops->prep(td, io_u);
	180
	181	dprint(FD_IO, "->prep(%p)=%d\n", io_u, ret);
	182	if (ret)
	183	unlock_file(td, io_u->file);
	184	return ret;
	185	}
	186
	187	return 0;
	188	}
	189
	190	int td_io_getevents(struct thread_data *td, unsigned int min, unsigned int max,
	191	struct timespec *t)
	192	{
	193	int r = 0;
	194
	195	if (min > 0 && td->io_ops->commit) {
	196	r = td->io_ops->commit(td);
	197	if (r < 0)
	198	goto out;
	199	}
	200	if (max > td->cur_depth)
	201	max = td->cur_depth;
	202	if (min > max)
	203	max = min;
	204
	205	r = 0;
	206	if (max && td->io_ops->getevents)
	207	r = td->io_ops->getevents(td, min, max, t);
	208	out:
	209	if (r >= 0)
	210	io_u_mark_complete(td, r);
	211	else
	212	td_verror(td, r, "get_events");
	213
	214	dprint(FD_IO, "getevents: %d\n", r);
	215	return r;
	216	}
	217
	218	int td_io_queue(struct thread_data td, struct io_u io_u)
	219	{
	220	int ret;
	221
	222	dprint_io_u(io_u, "queue");
	223	fio_ro_check(td, io_u);
	224
	225	assert((io_u->flags & IO_U_F_FLIGHT) == 0);
	226	io_u->flags \|= IO_U_F_FLIGHT;
	227
	228	assert(fio_file_open(io_u->file));
	229
	230	io_u->error = 0;
	231	io_u->resid = 0;
	232
	233	if (td->io_ops->flags & FIO_SYNCIO) {
	234	if (fio_fill_issue_time(td))
	235	fio_gettime(&io_u->issue_time, NULL);
	236
	237	/*
	238	* only used for iolog
	239	*/
	240	if (td->o.read_iolog_file)
	241	memcpy(&td->last_issue, &io_u->issue_time,
	242	sizeof(struct timeval));
	243	}
	244
	245	if (ddir_rw(io_u->ddir))
	246	td->io_issues[io_u->ddir]++;
	247
	248	ret = td->io_ops->queue(td, io_u);
	249
	250	unlock_file(td, io_u->file);
	251
	252	/*
	253	* Add warning for O_DIRECT so that users have an easier time
	254	* spotting potentially bad alignment. If this triggers for the first
	255	* IO, then it's likely an alignment problem or because the host fs
	256	* does not support O_DIRECT
	257	*/
	258	if (io_u->error == EINVAL && td->io_issues[io_u->ddir & 1] == 1 &&
	259	td->o.odirect) {
	260	log_info("fio: first direct IO errored. File system may not "
	261	"support direct IO, or iomem_align= is bad.\n");
	262	}
	263
	264	if (!td->io_ops->commit) {
	265	io_u_mark_submit(td, 1);
	266	io_u_mark_complete(td, 1);
	267	}
	268
	269	if (ret == FIO_Q_COMPLETED) {
	270	if (ddir_rw(io_u->ddir)) {
	271	io_u_mark_depth(td, 1);
	272	td->ts.total_io_u[io_u->ddir]++;
	273	} else if (io_u->ddir == DDIR_TRIM)
	274	td->ts.total_io_u[2]++;
	275	} else if (ret == FIO_Q_QUEUED) {
	276	int r;
	277
	278	if (ddir_rw(io_u->ddir)) {
	279	td->io_u_queued++;
	280	td->ts.total_io_u[io_u->ddir]++;
	281	}
	282
	283	if (td->io_u_queued >= td->o.iodepth_batch) {
	284	r = td_io_commit(td);
	285	if (r < 0)
	286	return r;
	287	}
	288	}
	289
	290	if ((td->io_ops->flags & FIO_SYNCIO) == 0) {
	291	if (fio_fill_issue_time(td))
	292	fio_gettime(&io_u->issue_time, NULL);
	293
	294	/*
	295	* only used for iolog
	296	*/
	297	if (td->o.read_iolog_file)
	298	memcpy(&td->last_issue, &io_u->issue_time,
	299	sizeof(struct timeval));
	300	}
	301
	302	return ret;
	303	}
	304
	305	int td_io_init(struct thread_data *td)
	306	{
	307	int ret = 0;
	308
	309	if (td->io_ops->init) {
	310	ret = td->io_ops->init(td);
	311	if (ret && td->o.iodepth > 1) {
	312	log_err("fio: io engine init failed. Perhaps try"
	313	" reducing io depth?\n");
	314	}
	315	}
	316
	317	return ret;
	318	}
	319
	320	int td_io_commit(struct thread_data *td)
	321	{
	322	int ret;
	323
	324	dprint(FD_IO, "calling ->commit(), depth %d\n", td->cur_depth);
	325
	326	if (!td->cur_depth \|\| !td->io_u_queued)
	327	return 0;
	328
	329	io_u_mark_depth(td, td->io_u_queued);
	330	td->io_u_queued = 0;
	331
	332	if (td->io_ops->commit) {
	333	ret = td->io_ops->commit(td);
	334	if (ret)
	335	td_verror(td, -ret, "io commit");
	336	}
	337
	338	return 0;
	339	}
	340
	341	int td_io_open_file(struct thread_data td, struct fio_file f)
	342	{
	343	assert(!fio_file_open(f));
	344	assert(f->fd == -1);
	345
	346	if (td->io_ops->open_file(td, f)) {
	347	if (td->error == EINVAL && td->o.odirect)
	348	log_err("fio: destination does not support O_DIRECT\n");
	349	if (td->error == EMFILE) {
	350	log_err("fio: try reducing/setting openfiles (failed"
	351	" at %u of %u)\n", td->nr_open_files,
	352	td->o.nr_files);
	353	}
	354
	355	assert(f->fd == -1);
	356	assert(!fio_file_open(f));
	357	return 1;
	358	}
	359
	360	fio_file_reset(f);
	361	fio_file_set_open(f);
	362	fio_file_clear_closing(f);
	363	disk_util_inc(f->du);
	364
	365	td->nr_open_files++;
	366	get_file(f);
	367
	368	if (f->filetype == FIO_TYPE_PIPE) {
	369	if (td_random(td)) {
	370	log_err("fio: can't seek on pipes (no random io)\n");
	371	goto err;
	372	}
	373	}
	374
	375	if (td->io_ops->flags & FIO_DISKLESSIO)
	376	goto done;
	377
	378	if (td->o.invalidate_cache && file_invalidate_cache(td, f))
	379	goto err;
	380
	381	if (td->o.fadvise_hint &&
	382	(f->filetype == FIO_TYPE_BD \|\| f->filetype == FIO_TYPE_FILE)) {
	383	int flags;
	384
	385	if (td_random(td))
	386	flags = POSIX_FADV_RANDOM;
	387	else
	388	flags = POSIX_FADV_SEQUENTIAL;
	389
	390	if (posix_fadvise(f->fd, f->file_offset, f->io_size, flags) < 0) {
	391	td_verror(td, errno, "fadvise");
	392	goto err;
	393	}
	394	}
	395
	396	#ifdef FIO_OS_DIRECTIO
	397	/*
	398	* Some OS's have a distinct call to mark the file non-buffered,
	399	* instead of using O_DIRECT (Solaris)
	400	*/
	401	if (td->o.odirect) {
	402	int ret = fio_set_odirect(f->fd);
	403
	404	if (ret) {
	405	td_verror(td, ret, "fio_set_odirect");
	406	log_err("fio: the file system does not seem to support direct IO\n");
	407	goto err;
	408	}
	409	}
	410	#endif
	411
	412	done:
	413	log_file(td, f, FIO_LOG_OPEN_FILE);
	414	return 0;
	415	err:
	416	disk_util_dec(f->du);
	417	if (td->io_ops->close_file)
	418	td->io_ops->close_file(td, f);
	419	return 1;
	420	}
	421
	422	int td_io_close_file(struct thread_data td, struct fio_file f)
	423	{
	424	if (!fio_file_closing(f))
	425	log_file(td, f, FIO_LOG_CLOSE_FILE);
	426
	427	/*
	428	* mark as closing, do real close when last io on it has completed
	429	*/
	430	fio_file_set_closing(f);
	431
	432	disk_util_dec(f->du);
	433	unlock_file_all(td, f);
	434
	435	return put_file(td, f);
	436	}
	437
	438	int td_io_get_file_size(struct thread_data td, struct fio_file f)
	439	{
	440	if (!td->io_ops->get_file_size)
	441	return 0;
	442
	443	return td->io_ops->get_file_size(td, f);
	444	}
	445
	446	static int do_sync_file_range(struct thread_data td, struct fio_file f)
	447	{
	448	off64_t offset, nbytes;
	449
	450	offset = f->first_write;
	451	nbytes = f->last_write - f->first_write;
	452
	453	if (!nbytes)
	454	return 0;
	455
	456	return sync_file_range(f->fd, offset, nbytes, td->o.sync_file_range);
	457	}
	458
	459	int do_io_u_sync(struct thread_data td, struct io_u io_u)
	460	{
	461	int ret;
	462
	463	if (io_u->ddir == DDIR_SYNC) {
	464	ret = fsync(io_u->file->fd);
	465	} else if (io_u->ddir == DDIR_DATASYNC) {
	466	#ifdef FIO_HAVE_FDATASYNC
	467	ret = fdatasync(io_u->file->fd);
	468	#else
	469	ret = io_u->xfer_buflen;
	470	io_u->error = EINVAL;
	471	#endif
	472	} else if (io_u->ddir == DDIR_SYNC_FILE_RANGE)
	473	ret = do_sync_file_range(td, io_u->file);
	474	else {
	475	ret = io_u->xfer_buflen;
	476	io_u->error = EINVAL;
	477	}
	478
	479	if (ret < 0)
	480	io_u->error = errno;
	481
	482	return ret;
	483	}
	484
	485	int do_io_u_trim(struct thread_data td, struct io_u io_u)
	486	{
	487	#ifndef FIO_HAVE_TRIM
	488	io_u->error = EINVAL;
	489	return 0;
	490	#else
	491	struct fio_file *f = io_u->file;
	492	int ret;
	493
	494	ret = os_trim(f->fd, io_u->offset, io_u->xfer_buflen);
	495	if (!ret)
	496	return io_u->xfer_buflen;;
	497
	498	io_u->error = ret;
	499	return 0;
	500	#endif
	501	}