[fio.git] / filesetup.c

#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/types.h>

#include "fio.h"
#include "os.h"

/*
 * Check if the file exists and it's large enough.
 */
static int file_ok(struct thread_data *td, struct fio_file *f)
{
	struct stat st;

	if (f->filetype != FIO_TYPE_FILE ||
	    (td->io_ops->flags & FIO_DISKLESSIO))
		return 0;

	if (lstat(f->file_name, &st) == -1)
		return 1;

	/*
	 * if it's a special file, size is always ok for now
	 */
	if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
		return 0;
	if (st.st_size < (off_t) f->file_size)
		return 1;

	return 0;
}

static int create_file(struct thread_data *td, struct fio_file *f)
{
	unsigned long long left;
	unsigned int bs;
	char *b;
	int r;

	f->fd = open(f->file_name, O_WRONLY | O_CREAT | O_TRUNC, 0644);
	if (f->fd < 0) {
		td_verror(td, errno, "open");
		return 1;
	}

	if (ftruncate(f->fd, f->file_size) == -1) {
		td_verror(td, errno, "ftruncate");
		goto err;
	}

	if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
		td_verror(td, errno, "posix_fallocate");
		goto err;
	}

	b = malloc(td->o.max_bs[DDIR_WRITE]);
	memset(b, 0, td->o.max_bs[DDIR_WRITE]);

	left = f->file_size;
	while (left && !td->terminate) {
		bs = td->o.max_bs[DDIR_WRITE];
		if (bs > left)
			bs = left;

		r = write(f->fd, b, bs);

		if (r == (int) bs) {
			left -= bs;
			continue;
		} else {
			if (r < 0)
				td_verror(td, errno, "write");
			else
				td_verror(td, EIO, "write");

			break;
		}
	}

	if (td->terminate)
		unlink(f->file_name);
	else if (td->o.create_fsync)
		fsync(f->fd);

	free(b);
	close(f->fd);
	f->fd = -1;
	return 0;
err:
	close(f->fd);
	f->fd = -1;
	return 1;
}

static unsigned long long set_rand_file_size(struct thread_data *td,
					     unsigned long long total_size)
{
	unsigned long long upper = total_size;
	unsigned long long ret;
	long r;

	if (upper > td->o.file_size_high)
		upper = td->o.file_size_high;
	else if (upper < td->o.file_size_low)
		return 0;
	else if (!upper)
		return 0;

	r = os_random_long(&td->file_size_state);
	ret = td->o.file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
	ret -= (ret % td->o.rw_min_bs);
	if (ret > upper)
		ret = upper;
	return ret;
}

static int fill_file_size(struct thread_data *td, struct fio_file *f,
			  unsigned long long *file_size, int new_files)
{
	if (!td->o.file_size_low) {
		f->file_size = *file_size / new_files;
		f->real_file_size = f->file_size;
	} else {
		/*
		 * If we don't have enough space left for a file
		 * of the minimum size, bail.
		 */
		if (*file_size < td->o.file_size_low)
			return 1;

		f->file_size = set_rand_file_size(td, *file_size);
		f->real_file_size = f->file_size;
		*file_size -= f->file_size;
	}

	return 0;
}

static int create_files(struct thread_data *td)
{
	struct fio_file *f;
	int err, need_create, can_extend;
	unsigned long long total_file_size, local_file_size, create_size;
	unsigned int i, new_files;

	new_files = 0;
	total_file_size = td->o.size;
	for_each_file(td, f, i) {
		unsigned long long s;

		f->file_offset = td->o.start_offset;

		if (f->filetype != FIO_TYPE_FILE)
			continue;
		if (!total_file_size)
			continue;

		if (f->flags & FIO_FILE_EXISTS) {
			if ((f->file_size > td->o.size / td->o.nr_files) ||
			    !f->file_size)
				f->file_size = td->o.size / td->o.nr_files;

			s = f->file_size;
			if (s > total_file_size)
				s = total_file_size;

			total_file_size -= s;
		} else
			new_files++;
	}

	/*
	 * unless specifically asked for overwrite, let normal io extend it
	 */
	can_extend = !td->o.overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
	if (can_extend && new_files) {
		for_each_file(td, f, i) {
			if (fill_file_size(td, f, &total_file_size, new_files)) {
				log_info("fio: limited to %d files\n", i);
				td->o.nr_files = i;
				break;
			}
		}

		return 0;
	}

	local_file_size = total_file_size;
	if (!local_file_size)
		local_file_size = -1;

	total_file_size = 0;
	need_create = 0;
	create_size = 0;
	for_each_file(td, f, i) {
		int file_there;

		if (f->filetype != FIO_TYPE_FILE)
			continue;
		if (f->flags & FIO_FILE_EXISTS) {
			total_file_size += f->file_size;
			continue;
		}

		if (fill_file_size(td, f, &local_file_size, new_files)) {
			log_info("fio: limited to %d files\n", i);
			new_files -= (td->o.nr_files - i);
			td->o.nr_files = i;
			break;
		}

		total_file_size += f->file_size;
		create_size += f->file_size;
		file_there = !file_ok(td, f);

		if (file_there && td_write(td) && !td->o.overwrite) {
			unlink(f->file_name);
			file_there = 0;
		}

		need_create += !file_there;
	}

	if (!need_create)
		return 0;

	if (!td->o.size && !total_file_size) {
		log_err("Need size for create\n");
		td_verror(td, EINVAL, "file_size");
		return 1;
	}

	temp_stall_ts = 1;
	log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
				td->o.name, new_files, create_size >> 20);

	err = 0;
	for_each_file(td, f, i) {
		/*
		 * Only unlink files that we created.
		 */
		f->flags &= ~FIO_FILE_UNLINK;
		if (file_ok(td, f)) {
			if (td->o.unlink)
				f->flags |= FIO_FILE_UNLINK;

			err = create_file(td, f);
			if (err)
				break;
		}
	}

	temp_stall_ts = 0;
	return err;
}

static int file_size(struct thread_data *td, struct fio_file *f)
{
	struct stat st;

	if (td->o.overwrite) {
		if (fstat(f->fd, &st) == -1) {
			td_verror(td, errno, "fstat");
			return 1;
		}

		f->real_file_size = st.st_size;

		if (!f->file_size || f->file_size > f->real_file_size)
			f->file_size = f->real_file_size;
	} else
		f->real_file_size = f->file_size;

	return 0;
}

static int bdev_size(struct thread_data *td, struct fio_file *f)
{
	unsigned long long bytes;
	int r;

	r = blockdev_size(f->fd, &bytes);
	if (r) {
		td_verror(td, r, "blockdev_size");
		return 1;
	}

	f->real_file_size = bytes;

	/*
	 * no extend possibilities, so limit size to device size if too large
	 */
	if (!f->file_size || f->file_size > f->real_file_size)
		f->file_size = f->real_file_size;

	f->file_size -= f->file_offset;
	return 0;
}

static int get_file_size(struct thread_data *td, struct fio_file *f)
{
	int ret = 0;

	if (f->filetype == FIO_TYPE_FILE) {
		if (!(f->flags & FIO_FILE_EXISTS))
			ret = file_size(td, f);
	} else if (f->filetype == FIO_TYPE_BD)
		ret = bdev_size(td, f);
	else
		f->real_file_size = -1;

	if (ret)
		return ret;

	if (f->file_offset > f->real_file_size) {
		log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
		return 1;
	}

	return 0;
}

int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
{
	int ret = 0;

	if (td->o.odirect)
		return 0;

	/*
	 * FIXME: add blockdev flushing too
	 */
	if (f->mmap)
		ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
	else if (f->filetype == FIO_TYPE_FILE)
		ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
	else if (f->filetype == FIO_TYPE_BD)
		ret = blockdev_invalidate_cache(f->fd);
	else if (f->filetype == FIO_TYPE_CHAR)
		ret = 0;

	if (ret < 0) {
		td_verror(td, errno, "invalidate_cache");
		return 1;
	}

	return ret;
}

void generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
{
	close(f->fd);
	f->fd = -1;
}

int generic_open_file(struct thread_data *td, struct fio_file *f)
{
	int flags = 0;

	if (td->o.odirect)
		flags |= OS_O_DIRECT;
	if (td->o.sync_io)
		flags |= O_SYNC;

	if (td_write(td) || td_rw(td)) {
		flags |= O_RDWR;

		if (f->filetype == FIO_TYPE_FILE)
			flags |= O_CREAT;

		f->fd = open(f->file_name, flags, 0600);
	} else {
		if (f->filetype == FIO_TYPE_CHAR)
			flags |= O_RDWR;
		else
			flags |= O_RDONLY;

		f->fd = open(f->file_name, flags);
	}

	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 (__e == EINVAL && td->o.odirect)
			log_err("fio: destination does not support O_DIRECT\n");
		if (__e == EMFILE)
			log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->o.nr_files);
		return 1;
	}

	if (get_file_size(td, f))
		goto err;

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

	if (!td->o.fadvise_hint)
		return 0;

	if (!td_random(td)) {
		if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
			td_verror(td, errno, "fadvise");
			goto err;
		}
	} else {
		if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
			td_verror(td, errno, "fadvise");
			goto err;
		}
	}

	return 0;
err:
	close(f->fd);
	return 1;
}

int open_files(struct thread_data *td)
{
	struct fio_file *f;
	unsigned int i;
	int err = 0;

	for_each_file(td, f, i) {
		err = td_io_open_file(td, f);
		if (err)
			break;

		if (td->o.open_files == td->nr_open_files)
			break;
	}

	if (!err)
		return 0;

	for_each_file(td, f, i)
		td_io_close_file(td, f);

	return err;
}

int setup_files(struct thread_data *td)
{
	struct fio_file *f;
	unsigned int i;
	int err;

	/*
	 * if ioengine defines a setup() method, it's responsible for
	 * setting up everything in the td->files[] area.
	 */
	if (td->io_ops->setup)
		return td->io_ops->setup(td);

	if (create_files(td))
		return 1;

	err = open_files(td);
	if (err)
		return err;

	/*
	 * Recalculate the total file size now that files are set up.
	 */
	td->o.size = 0;
	for_each_file(td, f, i)
		td->o.size += f->file_size;

	td->io_size = td->o.size;
	if (td->io_size == 0) {
		log_err("%s: no io blocks\n", td->o.name);
		td_verror(td, EINVAL, "total_file_size");
		return 1;
	}

	if (!td->o.zone_size)
		td->o.zone_size = td->io_size;

	td->total_io_size = td->io_size * td->o.loops;

	for_each_file(td, f, i)
		td_io_close_file(td, f);

	return err;
}

int init_random_map(struct thread_data *td)
{
	int num_maps, blocks;
	struct fio_file *f;
	unsigned int i;

	if (td->o.norandommap)
		return 0;

	for_each_file(td, f, i) {
		blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
		num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
		f->file_map = malloc(num_maps * sizeof(long));
		if (!f->file_map) {
			log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
			return 1;
		}
		f->num_maps = num_maps;
		memset(f->file_map, 0, num_maps * sizeof(long));
	}

	return 0;
}

void close_files(struct thread_data *td)
{
	struct fio_file *f;
	unsigned int i;

	for_each_file(td, f, i) {
		if ((f->flags & FIO_FILE_UNLINK) &&
		    f->filetype == FIO_TYPE_FILE)
			unlink(f->file_name);

		td_io_close_file(td, f);

		free(f->file_name);
		f->file_name = NULL;

		if (f->file_map) {
			free(f->file_map);
			f->file_map = NULL;
		}
	}

	td->o.filename = NULL;
	td->files = NULL;
	td->o.nr_files = 0;
}

static void get_file_type(struct fio_file *f)
{
	struct stat sb;

	f->filetype = FIO_TYPE_FILE;

	if (!lstat(f->file_name, &sb)) {
		f->flags |= FIO_FILE_EXISTS;

		if (S_ISBLK(sb.st_mode))
			f->filetype = FIO_TYPE_BD;
		else if (S_ISCHR(sb.st_mode))
			f->filetype = FIO_TYPE_CHAR;
		else {
			/*
			 * might as well do this here, and save a stat later on
			 */
			f->real_file_size = sb.st_size;
			f->file_size = f->real_file_size;
		}
	}
}

void add_file(struct thread_data *td, const char *fname)
{
	int cur_files = td->files_index;
	char file_name[PATH_MAX];
	struct fio_file *f;
	int len = 0;

	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));

	f = &td->files[cur_files];
	memset(f, 0, sizeof(*f));
	f->fd = -1;

	if (td->o.directory)
		len = sprintf(file_name, "%s/", td->o.directory);

	sprintf(file_name + len, "%s", fname);
	f->file_name = strdup(file_name);

	get_file_type(f);

	td->files_index++;
	if (f->filetype == FIO_TYPE_FILE)
		td->nr_normal_files++;
}

void get_file(struct fio_file *f)
{
	f->references++;
}

void put_file(struct thread_data *td, struct fio_file *f)
{
	if (!(f->flags & FIO_FILE_OPEN))
		return;

	assert(f->references);
	if (--f->references)
		return;

	if (should_fsync(td) && td->o.fsync_on_close)
		fsync(f->fd);

	if (td->io_ops->close_file)
		td->io_ops->close_file(td, f);
	td->nr_open_files--;
	f->flags &= ~FIO_FILE_OPEN;
}

static int recurse_dir(struct thread_data *td, const char *dirname)
{
	struct dirent *dir;
	int ret = 0;
	DIR *D;

	D = opendir(dirname);
	if (!D) {
		td_verror(td, errno, "opendir");
		return 1;
	}

	while ((dir = readdir(D)) != NULL) {
		char full_path[PATH_MAX];
		struct stat sb;

		if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
			continue;

		sprintf(full_path, "%s/%s", dirname, dir->d_name);

		if (lstat(full_path, &sb) == -1) {
			if (errno != ENOENT) {
				td_verror(td, errno, "stat");
				return 1;
			}
		}

		if (S_ISREG(sb.st_mode)) {
			add_file(td, full_path);
			td->o.nr_files++;
			continue;
		}

		if ((ret = recurse_dir(td, full_path)) != 0)
			break;
	}

	closedir(D);
	return ret;
}

int add_dir_files(struct thread_data *td, const char *path)
{
	return recurse_dir(td, path);
}
Commit	Line	Data
	1	#include <unistd.h>
	2	#include <fcntl.h>
	3	#include <string.h>
	4	#include <assert.h>
	5	#include <dirent.h>
	6	#include <sys/stat.h>
	7	#include <sys/mman.h>
	8	#include <sys/types.h>
	9
	10	#include "fio.h"
	11	#include "os.h"
	12
	13	/*
	14	* Check if the file exists and it's large enough.
	15	*/
	16	static int file_ok(struct thread_data td, struct fio_file f)
	17	{
	18	struct stat st;
	19
	20	if (f->filetype != FIO_TYPE_FILE \|\|
	21	(td->io_ops->flags & FIO_DISKLESSIO))
	22	return 0;
	23
	24	if (lstat(f->file_name, &st) == -1)
	25	return 1;
	26
	27	/*
	28	* if it's a special file, size is always ok for now
	29	*/
	30	if (S_ISCHR(st.st_mode) \|\| S_ISBLK(st.st_mode))
	31	return 0;
	32	if (st.st_size < (off_t) f->file_size)
	33	return 1;
	34
	35	return 0;
	36	}
	37
	38	static int create_file(struct thread_data td, struct fio_file f)
	39	{
	40	unsigned long long left;
	41	unsigned int bs;
	42	char *b;
	43	int r;
	44
	45	f->fd = open(f->file_name, O_WRONLY \| O_CREAT \| O_TRUNC, 0644);
	46	if (f->fd < 0) {
	47	td_verror(td, errno, "open");
	48	return 1;
	49	}
	50
	51	if (ftruncate(f->fd, f->file_size) == -1) {
	52	td_verror(td, errno, "ftruncate");
	53	goto err;
	54	}
	55
	56	if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
	57	td_verror(td, errno, "posix_fallocate");
	58	goto err;
	59	}
	60
	61	b = malloc(td->o.max_bs[DDIR_WRITE]);
	62	memset(b, 0, td->o.max_bs[DDIR_WRITE]);
	63
	64	left = f->file_size;
	65	while (left && !td->terminate) {
	66	bs = td->o.max_bs[DDIR_WRITE];
	67	if (bs > left)
	68	bs = left;
	69
	70	r = write(f->fd, b, bs);
	71
	72	if (r == (int) bs) {
	73	left -= bs;
	74	continue;
	75	} else {
	76	if (r < 0)
	77	td_verror(td, errno, "write");
	78	else
	79	td_verror(td, EIO, "write");
	80
	81	break;
	82	}
	83	}
	84
	85	if (td->terminate)
	86	unlink(f->file_name);
	87	else if (td->o.create_fsync)
	88	fsync(f->fd);
	89
	90	free(b);
	91	close(f->fd);
	92	f->fd = -1;
	93	return 0;
	94	err:
	95	close(f->fd);
	96	f->fd = -1;
	97	return 1;
	98	}
	99
	100	static unsigned long long set_rand_file_size(struct thread_data *td,
	101	unsigned long long total_size)
	102	{
	103	unsigned long long upper = total_size;
	104	unsigned long long ret;
	105	long r;
	106
	107	if (upper > td->o.file_size_high)
	108	upper = td->o.file_size_high;
	109	else if (upper < td->o.file_size_low)
	110	return 0;
	111	else if (!upper)
	112	return 0;
	113
	114	r = os_random_long(&td->file_size_state);
	115	ret = td->o.file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
	116	ret -= (ret % td->o.rw_min_bs);
	117	if (ret > upper)
	118	ret = upper;
	119	return ret;
	120	}
	121
	122	static int fill_file_size(struct thread_data td, struct fio_file f,
	123	unsigned long long *file_size, int new_files)
	124	{
	125	if (!td->o.file_size_low) {
	126	f->file_size = *file_size / new_files;
	127	f->real_file_size = f->file_size;
	128	} else {
	129	/*
	130	* If we don't have enough space left for a file
	131	* of the minimum size, bail.
	132	*/
	133	if (*file_size < td->o.file_size_low)
	134	return 1;
	135
	136	f->file_size = set_rand_file_size(td, *file_size);
	137	f->real_file_size = f->file_size;
	138	*file_size -= f->file_size;
	139	}
	140
	141	return 0;
	142	}
	143
	144	static int create_files(struct thread_data *td)
	145	{
	146	struct fio_file *f;
	147	int err, need_create, can_extend;
	148	unsigned long long total_file_size, local_file_size, create_size;
	149	unsigned int i, new_files;
	150
	151	new_files = 0;
	152	total_file_size = td->o.size;
	153	for_each_file(td, f, i) {
	154	unsigned long long s;
	155
	156	f->file_offset = td->o.start_offset;
	157
	158	if (f->filetype != FIO_TYPE_FILE)
	159	continue;
	160	if (!total_file_size)
	161	continue;
	162
	163	if (f->flags & FIO_FILE_EXISTS) {
	164	if ((f->file_size > td->o.size / td->o.nr_files) \|\|
	165	!f->file_size)
	166	f->file_size = td->o.size / td->o.nr_files;
	167
	168	s = f->file_size;
	169	if (s > total_file_size)
	170	s = total_file_size;
	171
	172	total_file_size -= s;
	173	} else
	174	new_files++;
	175	}
	176
	177	/*
	178	* unless specifically asked for overwrite, let normal io extend it
	179	*/
	180	can_extend = !td->o.overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
	181	if (can_extend && new_files) {
	182	for_each_file(td, f, i) {
	183	if (fill_file_size(td, f, &total_file_size, new_files)) {
	184	log_info("fio: limited to %d files\n", i);
	185	td->o.nr_files = i;
	186	break;
	187	}
	188	}
	189
	190	return 0;
	191	}
	192
	193	local_file_size = total_file_size;
	194	if (!local_file_size)
	195	local_file_size = -1;
	196
	197	total_file_size = 0;
	198	need_create = 0;
	199	create_size = 0;
	200	for_each_file(td, f, i) {
	201	int file_there;
	202
	203	if (f->filetype != FIO_TYPE_FILE)
	204	continue;
	205	if (f->flags & FIO_FILE_EXISTS) {
	206	total_file_size += f->file_size;
	207	continue;
	208	}
	209
	210	if (fill_file_size(td, f, &local_file_size, new_files)) {
	211	log_info("fio: limited to %d files\n", i);
	212	new_files -= (td->o.nr_files - i);
	213	td->o.nr_files = i;
	214	break;
	215	}
	216
	217	total_file_size += f->file_size;
	218	create_size += f->file_size;
	219	file_there = !file_ok(td, f);
	220
	221	if (file_there && td_write(td) && !td->o.overwrite) {
	222	unlink(f->file_name);
	223	file_there = 0;
	224	}
	225
	226	need_create += !file_there;
	227	}
	228
	229	if (!need_create)
	230	return 0;
	231
	232	if (!td->o.size && !total_file_size) {
	233	log_err("Need size for create\n");
	234	td_verror(td, EINVAL, "file_size");
	235	return 1;
	236	}
	237
	238	temp_stall_ts = 1;
	239	log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
	240	td->o.name, new_files, create_size >> 20);
	241
	242	err = 0;
	243	for_each_file(td, f, i) {
	244	/*
	245	* Only unlink files that we created.
	246	*/
	247	f->flags &= ~FIO_FILE_UNLINK;
	248	if (file_ok(td, f)) {
	249	if (td->o.unlink)
	250	f->flags \|= FIO_FILE_UNLINK;
	251
	252	err = create_file(td, f);
	253	if (err)
	254	break;
	255	}
	256	}
	257
	258	temp_stall_ts = 0;
	259	return err;
	260	}
	261
	262	static int file_size(struct thread_data td, struct fio_file f)
	263	{
	264	struct stat st;
	265
	266	if (td->o.overwrite) {
	267	if (fstat(f->fd, &st) == -1) {
	268	td_verror(td, errno, "fstat");
	269	return 1;
	270	}
	271
	272	f->real_file_size = st.st_size;
	273
	274	if (!f->file_size \|\| f->file_size > f->real_file_size)
	275	f->file_size = f->real_file_size;
	276	} else
	277	f->real_file_size = f->file_size;
	278
	279	return 0;
	280	}
	281
	282	static int bdev_size(struct thread_data td, struct fio_file f)
	283	{
	284	unsigned long long bytes;
	285	int r;
	286
	287	r = blockdev_size(f->fd, &bytes);
	288	if (r) {
	289	td_verror(td, r, "blockdev_size");
	290	return 1;
	291	}
	292
	293	f->real_file_size = bytes;
	294
	295	/*
	296	* no extend possibilities, so limit size to device size if too large
	297	*/
	298	if (!f->file_size \|\| f->file_size > f->real_file_size)
	299	f->file_size = f->real_file_size;
	300
	301	f->file_size -= f->file_offset;
	302	return 0;
	303	}
	304
	305	static int get_file_size(struct thread_data td, struct fio_file f)
	306	{
	307	int ret = 0;
	308
	309	if (f->filetype == FIO_TYPE_FILE) {
	310	if (!(f->flags & FIO_FILE_EXISTS))
	311	ret = file_size(td, f);
	312	} else if (f->filetype == FIO_TYPE_BD)
	313	ret = bdev_size(td, f);
	314	else
	315	f->real_file_size = -1;
	316
	317	if (ret)
	318	return ret;
	319
	320	if (f->file_offset > f->real_file_size) {
	321	log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
	322	return 1;
	323	}
	324
	325	return 0;
	326	}
	327
	328	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	329	{
	330	int ret = 0;
	331
	332	if (td->o.odirect)
	333	return 0;
	334
	335	/*
	336	* FIXME: add blockdev flushing too
	337	*/
	338	if (f->mmap)
	339	ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
	340	else if (f->filetype == FIO_TYPE_FILE)
	341	ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
	342	else if (f->filetype == FIO_TYPE_BD)
	343	ret = blockdev_invalidate_cache(f->fd);
	344	else if (f->filetype == FIO_TYPE_CHAR)
	345	ret = 0;
	346
	347	if (ret < 0) {
	348	td_verror(td, errno, "invalidate_cache");
	349	return 1;
	350	}
	351
	352	return ret;
	353	}
	354
	355	void generic_close_file(struct thread_data fio_unused td, struct fio_file f)
	356	{
	357	close(f->fd);
	358	f->fd = -1;
	359	}
	360
	361	int generic_open_file(struct thread_data td, struct fio_file f)
	362	{
	363	int flags = 0;
	364
	365	if (td->o.odirect)
	366	flags \|= OS_O_DIRECT;
	367	if (td->o.sync_io)
	368	flags \|= O_SYNC;
	369
	370	if (td_write(td) \|\| td_rw(td)) {
	371	flags \|= O_RDWR;
	372
	373	if (f->filetype == FIO_TYPE_FILE)
	374	flags \|= O_CREAT;
	375
	376	f->fd = open(f->file_name, flags, 0600);
	377	} else {
	378	if (f->filetype == FIO_TYPE_CHAR)
	379	flags \|= O_RDWR;
	380	else
	381	flags \|= O_RDONLY;
	382
	383	f->fd = open(f->file_name, flags);
	384	}
	385
	386	if (f->fd == -1) {
	387	char buf[FIO_VERROR_SIZE];
	388	int __e = errno;
	389
	390	snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
	391
	392	td_verror(td, __e, buf);
	393	if (__e == EINVAL && td->o.odirect)
	394	log_err("fio: destination does not support O_DIRECT\n");
	395	if (__e == EMFILE)
	396	log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->o.nr_files);
	397	return 1;
	398	}
	399
	400	if (get_file_size(td, f))
	401	goto err;
	402
	403	if (td->o.invalidate_cache && file_invalidate_cache(td, f))
	404	goto err;
	405
	406	if (!td->o.fadvise_hint)
	407	return 0;
	408
	409	if (!td_random(td)) {
	410	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
	411	td_verror(td, errno, "fadvise");
	412	goto err;
	413	}
	414	} else {
	415	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
	416	td_verror(td, errno, "fadvise");
	417	goto err;
	418	}
	419	}
	420
	421	return 0;
	422	err:
	423	close(f->fd);
	424	return 1;
	425	}
	426
	427	int open_files(struct thread_data *td)
	428	{
	429	struct fio_file *f;
	430	unsigned int i;
	431	int err = 0;
	432
	433	for_each_file(td, f, i) {
	434	err = td_io_open_file(td, f);
	435	if (err)
	436	break;
	437
	438	if (td->o.open_files == td->nr_open_files)
	439	break;
	440	}
	441
	442	if (!err)
	443	return 0;
	444
	445	for_each_file(td, f, i)
	446	td_io_close_file(td, f);
	447
	448	return err;
	449	}
	450
	451	int setup_files(struct thread_data *td)
	452	{
	453	struct fio_file *f;
	454	unsigned int i;
	455	int err;
	456
	457	/*
	458	* if ioengine defines a setup() method, it's responsible for
	459	* setting up everything in the td->files[] area.
	460	*/
	461	if (td->io_ops->setup)
	462	return td->io_ops->setup(td);
	463
	464	if (create_files(td))
	465	return 1;
	466
	467	err = open_files(td);
	468	if (err)
	469	return err;
	470
	471	/*
	472	* Recalculate the total file size now that files are set up.
	473	*/
	474	td->o.size = 0;
	475	for_each_file(td, f, i)
	476	td->o.size += f->file_size;
	477
	478	td->io_size = td->o.size;
	479	if (td->io_size == 0) {
	480	log_err("%s: no io blocks\n", td->o.name);
	481	td_verror(td, EINVAL, "total_file_size");
	482	return 1;
	483	}
	484
	485	if (!td->o.zone_size)
	486	td->o.zone_size = td->io_size;
	487
	488	td->total_io_size = td->io_size * td->o.loops;
	489
	490	for_each_file(td, f, i)
	491	td_io_close_file(td, f);
	492
	493	return err;
	494	}
	495
	496	int init_random_map(struct thread_data *td)
	497	{
	498	int num_maps, blocks;
	499	struct fio_file *f;
	500	unsigned int i;
	501
	502	if (td->o.norandommap)
	503	return 0;
	504
	505	for_each_file(td, f, i) {
	506	blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
	507	num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
	508	f->file_map = malloc(num_maps * sizeof(long));
	509	if (!f->file_map) {
	510	log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
	511	return 1;
	512	}
	513	f->num_maps = num_maps;
	514	memset(f->file_map, 0, num_maps * sizeof(long));
	515	}
	516
	517	return 0;
	518	}
	519
	520	void close_files(struct thread_data *td)
	521	{
	522	struct fio_file *f;
	523	unsigned int i;
	524
	525	for_each_file(td, f, i) {
	526	if ((f->flags & FIO_FILE_UNLINK) &&
	527	f->filetype == FIO_TYPE_FILE)
	528	unlink(f->file_name);
	529
	530	td_io_close_file(td, f);
	531
	532	free(f->file_name);
	533	f->file_name = NULL;
	534
	535	if (f->file_map) {
	536	free(f->file_map);
	537	f->file_map = NULL;
	538	}
	539	}
	540
	541	td->o.filename = NULL;
	542	td->files = NULL;
	543	td->o.nr_files = 0;
	544	}
	545
	546	static void get_file_type(struct fio_file *f)
	547	{
	548	struct stat sb;
	549
	550	f->filetype = FIO_TYPE_FILE;
	551
	552	if (!lstat(f->file_name, &sb)) {
	553	f->flags \|= FIO_FILE_EXISTS;
	554
	555	if (S_ISBLK(sb.st_mode))
	556	f->filetype = FIO_TYPE_BD;
	557	else if (S_ISCHR(sb.st_mode))
	558	f->filetype = FIO_TYPE_CHAR;
	559	else {
	560	/*
	561	* might as well do this here, and save a stat later on
	562	*/
	563	f->real_file_size = sb.st_size;
	564	f->file_size = f->real_file_size;
	565	}
	566	}
	567	}
	568
	569	void add_file(struct thread_data td, const char fname)
	570	{
	571	int cur_files = td->files_index;
	572	char file_name[PATH_MAX];
	573	struct fio_file *f;
	574	int len = 0;
	575
	576	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
	577
	578	f = &td->files[cur_files];
	579	memset(f, 0, sizeof(*f));
	580	f->fd = -1;
	581
	582	if (td->o.directory)
	583	len = sprintf(file_name, "%s/", td->o.directory);
	584
	585	sprintf(file_name + len, "%s", fname);
	586	f->file_name = strdup(file_name);
	587
	588	get_file_type(f);
	589
	590	td->files_index++;
	591	if (f->filetype == FIO_TYPE_FILE)
	592	td->nr_normal_files++;
	593	}
	594
	595	void get_file(struct fio_file *f)
	596	{
	597	f->references++;
	598	}
	599
	600	void put_file(struct thread_data td, struct fio_file f)
	601	{
	602	if (!(f->flags & FIO_FILE_OPEN))
	603	return;
	604
	605	assert(f->references);
	606	if (--f->references)
	607	return;
	608
	609	if (should_fsync(td) && td->o.fsync_on_close)
	610	fsync(f->fd);
	611
	612	if (td->io_ops->close_file)
	613	td->io_ops->close_file(td, f);
	614	td->nr_open_files--;
	615	f->flags &= ~FIO_FILE_OPEN;
	616	}
	617
	618	static int recurse_dir(struct thread_data td, const char dirname)
	619	{
	620	struct dirent *dir;
	621	int ret = 0;
	622	DIR *D;
	623
	624	D = opendir(dirname);
	625	if (!D) {
	626	td_verror(td, errno, "opendir");
	627	return 1;
	628	}
	629
	630	while ((dir = readdir(D)) != NULL) {
	631	char full_path[PATH_MAX];
	632	struct stat sb;
	633
	634	if (!strcmp(dir->d_name, ".") \|\| !strcmp(dir->d_name, ".."))
	635	continue;
	636
	637	sprintf(full_path, "%s/%s", dirname, dir->d_name);
	638
	639	if (lstat(full_path, &sb) == -1) {
	640	if (errno != ENOENT) {
	641	td_verror(td, errno, "stat");
	642	return 1;
	643	}
	644	}
	645
	646	if (S_ISREG(sb.st_mode)) {
	647	add_file(td, full_path);
	648	td->o.nr_files++;
	649	continue;
	650	}
	651
	652	if ((ret = recurse_dir(td, full_path)) != 0)
	653	break;
	654	}
	655
	656	closedir(D);
	657	return ret;
	658	}
	659
	660	int add_dir_files(struct thread_data td, const char path)
	661	{
	662	return recurse_dir(td, path);
	663	}