[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 <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_sync(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 &&
	    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_sync(io_u->ddir)) {
			io_u_mark_depth(td, 1);
			td->ts.total_io_u[io_u->ddir]++;
		}
	} else if (ret == FIO_Q_QUEUED) {
		int r;

		if (!ddir_sync(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 (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");
			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;
}
Commit	Line	Data
ebac4655 JA	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>
5c4e1dbc	15	#include <string.h>
2866c82d	16	#include <dlfcn.h>
0c6e7517	17	#include <assert.h>
8c16d840	18
ebac4655	19	#include "fio.h"
7c9b1bce	20	#include "diskutil.h"
ebac4655	21
01743ee1	22	static FLIST_HEAD(engine_list);
5f350952	23
8c16d840 JA	24	static int check_engine_ops(struct ioengine_ops *ops)
8c16d840 JA	25	{
5f350952	26	if (ops->version != FIO_IOOPS_VERSION) {
5ec10eaa JA	27	log_err("bad ioops version %d (want %d)\n", ops->version,
5ec10eaa JA	28	FIO_IOOPS_VERSION);
5f350952 JA	29	return 1;
	30	}
	31
36167d82 JA	32	if (!ops->queue) {
	33	log_err("%s: no queue handler\n", ops->name);
	34	return 1;
	35	}
	36
	37	/*
	38	* sync engines only need a ->queue()
	39	*/
	40	if (ops->flags & FIO_SYNCIO)
	41	return 0;
5ec10eaa	42
8c16d840	43	if (!ops->event) {
36167d82	44	log_err("%s: no event handler\n", ops->name);
8c16d840 JA	45	return 1;
	46	}
	47	if (!ops->getevents) {
36167d82	48	log_err("%s: no getevents handler\n", ops->name);
8c16d840 JA	49	return 1;
	50	}
	51	if (!ops->queue) {
36167d82	52	log_err("%s: no queue handler\n", ops->name);
8c16d840 JA	53	return 1;
8c16d840 JA	54	}
5ec10eaa	55
8c16d840 JA	56	return 0;
	57	}
	58
5f350952	59	void unregister_ioengine(struct ioengine_ops *ops)
ebac4655	60	{
ee56ad50	61	dprint(FD_IO, "ioengine %s unregistered\n", ops->name);
01743ee1 JA	62	flist_del(&ops->list);
01743ee1 JA	63	INIT_FLIST_HEAD(&ops->list);
5f350952 JA	64	}
5f350952 JA	65
b2fdda43	66	void register_ioengine(struct ioengine_ops *ops)
5f350952	67	{
ee56ad50	68	dprint(FD_IO, "ioengine %s registered\n", ops->name);
01743ee1 JA	69	INIT_FLIST_HEAD(&ops->list);
01743ee1 JA	70	flist_add_tail(&ops->list, &engine_list);
5f350952 JA	71	}
	72
	73	static struct ioengine_ops find_ioengine(const char name)
	74	{
	75	struct ioengine_ops *ops;
01743ee1	76	struct flist_head *entry;
ebac4655	77
01743ee1 JA	78	flist_for_each(entry, &engine_list) {
01743ee1 JA	79	ops = flist_entry(entry, struct ioengine_ops, list);
bc5b77a8	80	if (!strcmp(name, ops->name))
5f350952 JA	81	return ops;
	82	}
	83
	84	return NULL;
	85	}
	86
	87	static struct ioengine_ops dlopen_ioengine(struct thread_data td,
	88	const char *engine_lib)
	89	{
	90	struct ioengine_ops *ops;
	91	void *dlhandle;
	92
ee56ad50 JA	93	dprint(FD_IO, "dload engine %s\n", engine_lib);
ee56ad50 JA	94
2866c82d JA	95	dlerror();
2866c82d JA	96	dlhandle = dlopen(engine_lib, RTLD_LAZY);
d4dbaaa8	97	if (!dlhandle) {
e1161c32	98	td_vmsg(td, -1, dlerror(), "dlopen");
d4dbaaa8 JA	99	return NULL;
d4dbaaa8 JA	100	}
8756e4d4	101
da51c050 JA	102	/*
	103	* Unlike the included modules, external engines should have a
	104	* non-static ioengine structure that we can reference.
	105	*/
2866c82d	106	ops = dlsym(dlhandle, "ioengine");
d4dbaaa8	107	if (!ops) {
e1161c32	108	td_vmsg(td, -1, dlerror(), "dlsym");
d4dbaaa8 JA	109	dlclose(dlhandle);
	110	return NULL;
	111	}
8756e4d4	112
5f350952 JA	113	ops->dlhandle = dlhandle;
	114	return ops;
	115	}
	116
	117	struct ioengine_ops load_ioengine(struct thread_data td, const char *name)
	118	{
	119	struct ioengine_ops ops, ret;
	120	char engine[16];
	121
ee56ad50 JA	122	dprint(FD_IO, "load ioengine %s\n", name);
ee56ad50 JA	123
5f350952 JA	124	strncpy(engine, name, sizeof(engine) - 1);
	125
	126	/*
	127	* linux libaio has alias names, so convert to what we want
	128	*/
	129	if (!strncmp(engine, "linuxaio", 8) \|\| !strncmp(engine, "aio", 3))
	130	strcpy(engine, "libaio");
	131
	132	ops = find_ioengine(engine);
	133	if (!ops)
	134	ops = dlopen_ioengine(td, name);
	135
	136	if (!ops) {
	137	log_err("fio: engine %s not loadable\n", name);
b902ceb5 JA	138	return NULL;
	139	}
	140
8c16d840 JA	141	/*
	142	* Check that the required methods are there.
	143	*/
5f350952	144	if (check_engine_ops(ops))
8c16d840	145	return NULL;
8c16d840	146
84585003 JA	147	ret = malloc(sizeof(*ret));
	148	memcpy(ret, ops, sizeof(*ret));
	149	ret->data = NULL;
84585003 JA	150
84585003 JA	151	return ret;
8756e4d4 JA	152	}
8756e4d4 JA	153
2866c82d	154	void close_ioengine(struct thread_data *td)
8756e4d4	155	{
ee56ad50 JA	156	dprint(FD_IO, "close ioengine %s\n", td->io_ops->name);
ee56ad50 JA	157
2992b059	158	if (td->io_ops->cleanup) {
2866c82d	159	td->io_ops->cleanup(td);
2992b059 JA	160	td->io_ops->data = NULL;
2992b059 JA	161	}
b990b5c0	162
5f350952 JA	163	if (td->io_ops->dlhandle)
	164	dlclose(td->io_ops->dlhandle);
	165
84585003 JA	166	free(td->io_ops);
84585003 JA	167	td->io_ops = NULL;
b990b5c0	168	}
10ba535a JA	169
	170	int td_io_prep(struct thread_data td, struct io_u io_u)
	171	{
ee56ad50	172	dprint_io_u(io_u, "prep");
7101d9c2 JA	173	fio_ro_check(td, io_u);
7101d9c2 JA	174
4d4e80f2	175	lock_file(td, io_u->file, io_u->ddir);
b2bd2bd9	176
2ba1c290 JA	177	if (td->io_ops->prep) {
	178	int ret = td->io_ops->prep(td, io_u);
	179
	180	dprint(FD_IO, "->prep(%p)=%d\n", io_u, ret);
b2bd2bd9	181	if (ret)
4d4e80f2	182	unlock_file(td, io_u->file);
2ba1c290 JA	183	return ret;
2ba1c290 JA	184	}
10ba535a JA	185
	186	return 0;
	187	}
	188
e7d2e616	189	int td_io_getevents(struct thread_data *td, unsigned int min, unsigned int max,
10ba535a JA	190	struct timespec *t)
10ba535a JA	191	{
ee56ad50	192	int r = 0;
face81b2	193
ee56ad50 JA	194	if (min > 0 && td->io_ops->commit) {
ee56ad50 JA	195	r = td->io_ops->commit(td);
face81b2	196	if (r < 0)
ee56ad50	197	goto out;
face81b2	198	}
4950421a JA	199	if (max > td->cur_depth)
	200	max = td->cur_depth;
	201	if (min > max)
	202	max = min;
36167d82	203
ee56ad50	204	r = 0;
4950421a	205	if (max && td->io_ops->getevents)
ee56ad50 JA	206	r = td->io_ops->getevents(td, min, max, t);
ee56ad50 JA	207	out:
838bc709 JA	208	if (r >= 0)
838bc709 JA	209	io_u_mark_complete(td, r);
f3e11d05	210	else
7c639b14	211	td_verror(td, r, "get_events");
f3e11d05	212
ee56ad50 JA	213	dprint(FD_IO, "getevents: %d\n", r);
ee56ad50 JA	214	return r;
10ba535a JA	215	}
	216
	217	int td_io_queue(struct thread_data td, struct io_u io_u)
	218	{
7e77dd02 JA	219	int ret;
7e77dd02 JA	220
ee56ad50	221	dprint_io_u(io_u, "queue");
7101d9c2 JA	222	fio_ro_check(td, io_u);
7101d9c2 JA	223
0c6e7517 JA	224	assert((io_u->flags & IO_U_F_FLIGHT) == 0);
	225	io_u->flags \|= IO_U_F_FLIGHT;
	226
d6aed795	227	assert(fio_file_open(io_u->file));
3d7b485f	228
11786802 JA	229	io_u->error = 0;
	230	io_u->resid = 0;
	231
433afcb4	232	if (td->io_ops->flags & FIO_SYNCIO) {
12d9d841	233	if (fio_fill_issue_time(td))
9520ebb9	234	fio_gettime(&io_u->issue_time, NULL);
d0c15328 JA	235
	236	/*
	237	* only used for iolog
	238	*/
	239	if (td->o.read_iolog_file)
	240	memcpy(&td->last_issue, &io_u->issue_time,
5ec10eaa	241	sizeof(struct timeval));
433afcb4 JA	242	}
433afcb4 JA	243
5f9099ea	244	if (!ddir_sync(io_u->ddir))
755200a3 JA	245	td->io_issues[io_u->ddir]++;
755200a3 JA	246
7e77dd02	247	ret = td->io_ops->queue(td, io_u);
5aeb77df	248
4d4e80f2	249	unlock_file(td, io_u->file);
b2bd2bd9	250
cb211682 JA	251	/*
	252	* Add warning for O_DIRECT so that users have an easier time
	253	* spotting potentially bad alignment. If this triggers for the first
	254	* IO, then it's likely an alignment problem or because the host fs
	255	* does not support O_DIRECT
	256	*/
	257	if (io_u->error == EINVAL && td->io_issues[io_u->ddir] == 1 &&
	258	td->o.odirect) {
	259	log_info("fio: first direct IO errored. File system may not "
	260	"support direct IO, or iomem_align= is bad.\n");
	261	}
	262
838bc709 JA	263	if (!td->io_ops->commit) {
	264	io_u_mark_submit(td, 1);
	265	io_u_mark_complete(td, 1);
	266	}
	267
d8005759	268	if (ret == FIO_Q_COMPLETED) {
5f9099ea	269	if (!ddir_sync(io_u->ddir)) {
d8005759 JA	270	io_u_mark_depth(td, 1);
	271	td->ts.total_io_u[io_u->ddir]++;
	272	}
	273	} else if (ret == FIO_Q_QUEUED) {
eb7c8ae2 JA	274	int r;
eb7c8ae2 JA	275
5f9099ea	276	if (!ddir_sync(io_u->ddir)) {
d8005759 JA	277	td->io_u_queued++;
	278	td->ts.total_io_u[io_u->ddir]++;
	279	}
	280
	281	if (td->io_u_queued >= td->o.iodepth_batch) {
eb7c8ae2 JA	282	r = td_io_commit(td);
	283	if (r < 0)
	284	return r;
	285	}
	286	}
cb5ab512	287
433afcb4	288	if ((td->io_ops->flags & FIO_SYNCIO) == 0) {
12d9d841	289	if (fio_fill_issue_time(td))
9520ebb9	290	fio_gettime(&io_u->issue_time, NULL);
d0c15328 JA	291
	292	/*
	293	* only used for iolog
	294	*/
	295	if (td->o.read_iolog_file)
	296	memcpy(&td->last_issue, &io_u->issue_time,
	297	sizeof(struct timeval));
433afcb4 JA	298	}
433afcb4 JA	299
7e77dd02	300	return ret;
10ba535a	301	}
8c16d840 JA	302
	303	int td_io_init(struct thread_data *td)
	304	{
eeb12160	305	int ret = 0;
8c16d840	306
eeb12160 JA	307	if (td->io_ops->init) {
eeb12160 JA	308	ret = td->io_ops->init(td);
5ec10eaa JA	309	if (ret && td->o.iodepth > 1) {
	310	log_err("fio: io engine init failed. Perhaps try"
	311	" reducing io depth?\n");
	312	}
eeb12160 JA	313	}
	314
	315	return ret;
8c16d840	316	}
755200a3 JA	317
	318	int td_io_commit(struct thread_data *td)
	319	{
f3e11d05 JA	320	int ret;
f3e11d05 JA	321
ee56ad50 JA	322	dprint(FD_IO, "calling ->commit(), depth %d\n", td->cur_depth);
ee56ad50 JA	323
d8005759	324	if (!td->cur_depth \|\| !td->io_u_queued)
e1161c32	325	return 0;
cb5ab512	326
d8005759	327	io_u_mark_depth(td, td->io_u_queued);
cb5ab512	328	td->io_u_queued = 0;
d8005759	329
f3e11d05 JA	330	if (td->io_ops->commit) {
	331	ret = td->io_ops->commit(td);
	332	if (ret)
	333	td_verror(td, -ret, "io commit");
	334	}
755200a3 JA	335
	336	return 0;
	337	}
b5af8293 JA	338
	339	int td_io_open_file(struct thread_data td, struct fio_file f)
	340	{
22a57ba8 JA	341	assert(!fio_file_open(f));
	342	assert(f->fd == -1);
	343
413d6693 JA	344	if (td->io_ops->open_file(td, f)) {
	345	if (td->error == EINVAL && td->o.odirect)
	346	log_err("fio: destination does not support O_DIRECT\n");
5ec10eaa JA	347	if (td->error == EMFILE) {
	348	log_err("fio: try reducing/setting openfiles (failed"
	349	" at %u of %u)\n", td->nr_open_files,
	350	td->o.nr_files);
	351	}
413d6693	352
22a57ba8 JA	353	assert(f->fd == -1);
22a57ba8 JA	354	assert(!fio_file_open(f));
413d6693 JA	355	return 1;
	356	}
	357
d5707a35	358	fio_file_reset(f);
d6aed795 JA	359	fio_file_set_open(f);
d6aed795 JA	360	fio_file_clear_closing(f);
c97bd0fa	361	disk_util_inc(f->du);
d5707a35 JA	362
	363	td->nr_open_files++;
	364	get_file(f);
	365
66159828 JA	366	if (f->filetype == FIO_TYPE_PIPE) {
	367	if (td_random(td)) {
	368	log_err("fio: can't seek on pipes (no random io)\n");
	369	goto err;
	370	}
	371	}
	372
413d6693 JA	373	if (td->io_ops->flags & FIO_DISKLESSIO)
	374	goto done;
	375
	376	if (td->o.invalidate_cache && file_invalidate_cache(td, f))
	377	goto err;
	378
66159828 JA	379	if (td->o.fadvise_hint &&
66159828 JA	380	(f->filetype == FIO_TYPE_BD \|\| f->filetype == FIO_TYPE_FILE)) {
413d6693 JA	381	int flags;
	382
	383	if (td_random(td))
	384	flags = POSIX_FADV_RANDOM;
	385	else
	386	flags = POSIX_FADV_SEQUENTIAL;
	387
	388	if (fadvise(f->fd, f->file_offset, f->io_size, flags) < 0) {
	389	td_verror(td, errno, "fadvise");
	390	goto err;
	391	}
7bb48f84	392	}
a978ba68	393
e116f2b9 JA	394	#ifdef FIO_OS_DIRECTIO
	395	/*
	396	* Some OS's have a distinct call to mark the file non-buffered,
	397	* instead of using O_DIRECT (Solaris)
	398	*/
	399	if (td->o.odirect) {
	400	int ret = fio_set_odirect(f->fd);
	401
	402	if (ret) {
	403	td_verror(td, ret, "fio_set_odirect");
	404	goto err;
	405	}
	406	}
	407	#endif
	408
413d6693	409	done:
f29b25a3	410	log_file(td, f, FIO_LOG_OPEN_FILE);
413d6693 JA	411	return 0;
413d6693 JA	412	err:
c97bd0fa	413	disk_util_dec(f->du);
b284075a JA	414	if (td->io_ops->close_file)
b284075a JA	415	td->io_ops->close_file(td, f);
7bb48f84	416	return 1;
b5af8293 JA	417	}
b5af8293 JA	418
6977bcd0	419	int td_io_close_file(struct thread_data td, struct fio_file f)
b5af8293	420	{
d6aed795	421	if (!fio_file_closing(f))
f29b25a3 JA	422	log_file(td, f, FIO_LOG_CLOSE_FILE);
f29b25a3 JA	423
0ad920e7 JA	424	/*
	425	* mark as closing, do real close when last io on it has completed
	426	*/
d6aed795	427	fio_file_set_closing(f);
0ad920e7	428
c97bd0fa	429	disk_util_dec(f->du);
4d4e80f2	430	unlock_file_all(td, f);
29c1349f	431
6977bcd0	432	return put_file(td, f);
b5af8293	433	}
df9c26b1 JA	434
	435	int td_io_get_file_size(struct thread_data td, struct fio_file f)
	436	{
	437	if (!td->io_ops->get_file_size)
	438	return 0;
	439
	440	return td->io_ops->get_file_size(td, f);
	441	}
44f29692	442
0a28ecda	443	static int do_sync_file_range(struct thread_data td, struct fio_file f)
44f29692 JA	444	{
	445	off64_t offset, nbytes;
	446
	447	offset = f->first_write;
	448	nbytes = f->last_write - f->first_write;
	449
3843deb3 JA	450	if (!nbytes)
3843deb3 JA	451	return 0;
44f29692	452
3843deb3	453	return sync_file_range(f->fd, offset, nbytes, td->o.sync_file_range);
44f29692	454	}
0a28ecda JA	455
	456	int do_io_u_sync(struct thread_data td, struct io_u io_u)
	457	{
	458	int ret;
	459
	460	if (io_u->ddir == DDIR_SYNC) {
	461	ret = fsync(io_u->file->fd);
	462	} else if (io_u->ddir == DDIR_DATASYNC) {
	463	#ifdef FIO_HAVE_FDATASYNC
	464	ret = fdatasync(io_u->file->fd);
	465	#else
	466	ret = io_u->xfer_buflen;
	467	io_u->error = EINVAL;
	468	#endif
	469	} else if (io_u->ddir == DDIR_SYNC_FILE_RANGE)
	470	ret = do_sync_file_range(td, io_u->file);
	471	else {
	472	ret = io_u->xfer_buflen;
	473	io_u->error = EINVAL;
	474	}
	475
cb849a79 JA	476	if (ret < 0)
	477	io_u->error = errno;
	478
0a28ecda JA	479	return ret;
0a28ecda JA	480	}