[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"

static int extend_file(struct thread_data *td, struct fio_file *f)
{
	int r, new_layout = 0, unlink_file = 0, flags;
	unsigned long long left;
	unsigned int bs;
	char *b;

	/*
	 * check if we need to lay the file out complete again. fio
	 * does that for operations involving reads, or for writes
	 * where overwrite is set
	 */
	if (td_read(td) || (td_write(td) && td->o.overwrite))
		new_layout = 1;
	if (td_write(td) && !td->o.overwrite)
		unlink_file = 1;

	if ((unlink_file || new_layout) && (f->flags & FIO_FILE_EXISTS)) {
		if (unlink(f->file_name) < 0) {
			td_verror(td, errno, "unlink");
			return 1;
		}
	}

	flags = O_WRONLY | O_CREAT;
	if (new_layout)
		flags |= O_TRUNC;

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

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

	if (!new_layout)
		goto done;

	if (posix_fallocate(f->fd, 0, f->real_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->real_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);
done:
	close(f->fd);
	f->fd = -1;
	return 0;
err:
	close(f->fd);
	f->fd = -1;
	return 1;
}

static unsigned long long get_rand_file_size(struct thread_data *td)
{
	unsigned long long ret;
	long r;

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

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

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

	f->real_file_size = st.st_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;
	return 0;
}

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

	if (f->flags & FIO_SIZE_KNOWN)
		return 0;

	if (f->filetype == FIO_TYPE_FILE)
		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;
	}

	f->flags |= FIO_SIZE_KNOWN;
	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->io_size, MADV_DONTNEED);
	else if (f->filetype == FIO_TYPE_FILE)
		ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
	else if (f->filetype == FIO_TYPE_BD) {
		ret = blockdev_invalidate_cache(f->fd);
		if (ret < 0 && errno == EACCES && geteuid()) {
			log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
			ret = 0;
		}
	} 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 (get_file_size(td, f))
		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) {
			if (td->error == EMFILE) {
				log_err("fio: limited open files to: %d\n", td->nr_open_files);
				td->o.open_files = td->nr_open_files;
				err = 0;
				clear_error(td);
			}
			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;
}

/*
 * open/close all files, so that ->real_file_size gets set
 */
static void get_file_sizes(struct thread_data *td)
{
	struct fio_file *f;
	unsigned int i;

	for_each_file(td, f, i) {
		if (td->io_ops->open_file(td, f))
			clear_error(td);
		else
			td->io_ops->close_file(td, f);

		if (f->real_file_size == -1ULL && td->o.size)
			f->real_file_size = td->o.size / td->o.nr_files;
	}
}

/*
 * Open the files and setup files sizes, creating files if necessary.
 */
int setup_files(struct thread_data *td)
{
	unsigned long long total_size, extend_size;
	struct fio_file *f;
	unsigned int i;
	int err = 0, need_extend;

	/*
	 * if ioengine defines a setup() method, it's responsible for
	 * opening the files and setting f->real_file_size to indicate
	 * the valid range for that file.
	 */
	if (td->io_ops->setup)
		err = td->io_ops->setup(td);
	else
		get_file_sizes(td);

	if (err)
		return err;

	/*
	 * check sizes. if the files/devices do not exist and the size
	 * isn't passed to fio, abort.
	 */
	total_size = 0;
	for_each_file(td, f, i) {
		if (f->real_file_size == -1ULL)
			total_size = -1ULL;
		else
			total_size += f->real_file_size;
	}

	/*
	 * device/file sizes are zero and no size given, punt
	 */
	if ((!total_size || total_size == -1ULL) && !td->o.size) {
		log_err("%s: you need to specify size=\n", td->o.name);
		td_verror(td, EINVAL, "total_file_size");
		return 1;
	}

	/*
	 * now file sizes are known, so we can set ->io_size. if size= is
	 * not given, ->io_size is just equal to ->real_file_size. if size
	 * is given, ->io_size is size / nr_files.
	 */
	extend_size = total_size = 0;
	need_extend = 0;
	for_each_file(td, f, i) {
		if (!td->o.file_size_low) {
			/*
			 * no file size range given, file size is equal to
			 * total size divided by number of files. if that is
			 * zero, set it to the real file size.
			 */
			f->io_size = td->o.size / td->o.nr_files;
			if (!f->io_size)
				f->io_size = f->real_file_size;
		} else if (f->real_file_size < td->o.file_size_low ||
			   f->real_file_size > td->o.file_size_high) {
			/*
			 * file size given. if it's fixed, use that. if it's a
			 * range, generate a random size in-between.
			 */
			if (td->o.file_size_low == td->o.file_size_high)
				f->io_size = td->o.file_size_low;
			else
				f->io_size = get_rand_file_size(td);
		} else
			f->io_size = f->real_file_size;

		if (f->io_size == -1ULL)
			total_size = -1ULL;
		else
			total_size += f->io_size;

		if (f->filetype == FIO_TYPE_FILE &&
		    f->io_size > f->real_file_size &&
		    !(td->io_ops->flags & FIO_DISKLESSIO)) {
			need_extend++;
			extend_size += f->io_size;
			f->flags |= FIO_FILE_EXTEND;
		}
	}

	if (!td->o.size)
		td->o.size = total_size;

	/*
	 * See if we need to extend some files
	 */
	if (need_extend) {
		temp_stall_ts = 1;
		log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
			td->o.name, need_extend, extend_size >> 20);

		for_each_file(td, f, i) {
			if (!(f->flags & FIO_FILE_EXTEND))
				continue;

			assert(f->filetype == FIO_TYPE_FILE);
			f->flags &= ~FIO_FILE_EXTEND;
			f->real_file_size = f->io_size;
			err = extend_file(td, f);
			if (err)
				break;
		}
		temp_stall_ts = 0;
	}

	if (err)
		return err;

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

	td->total_io_size = td->o.size * td->o.loops;
	return 0;
}

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;
	free(td->files);
	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)) {
		if (S_ISBLK(sb.st_mode))
			f->filetype = FIO_TYPE_BD;
		else if (S_ISCHR(sb.st_mode))
			f->filetype = FIO_TYPE_CHAR;
	}
}

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) {
		char buf[FIO_VERROR_SIZE];

		snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
		td_verror(td, errno, buf);
		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 (!S_ISDIR(sb.st_mode))
			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)
{
	int ret = recurse_dir(td, path);

	if (!ret)
		log_info("fio: opendir added %d files\n", td->o.nr_files);

	return ret;
}

void dup_files(struct thread_data *td, struct thread_data *org)
{
	struct fio_file *f;
	unsigned int i;
	size_t bytes;

	if (!org->files)
		return;

	bytes = org->files_index * sizeof(*f);
	td->files = malloc(bytes);
	memcpy(td->files, org->files, bytes);

	for_each_file(td, f, i) {
		if (f->file_name)
			f->file_name = strdup(f->file_name);
	}
}
Commit	Line	Data
53cdc686 JA	1	#include <unistd.h>
	2	#include <fcntl.h>
	3	#include <string.h>
	4	#include <assert.h>
bbf6b540	5	#include <dirent.h>
53cdc686 JA	6	#include <sys/stat.h>
53cdc686 JA	7	#include <sys/mman.h>
bbf6b540	8	#include <sys/types.h>
53cdc686 JA	9
	10	#include "fio.h"
	11	#include "os.h"
	12
7bb48f84	13	static int extend_file(struct thread_data td, struct fio_file f)
25205e97	14	{
ea443657	15	int r, new_layout = 0, unlink_file = 0, flags;
25205e97 JA	16	unsigned long long left;
	17	unsigned int bs;
	18	char *b;
b2a15192	19
507a702f JA	20	/*
	21	* check if we need to lay the file out complete again. fio
	22	* does that for operations involving reads, or for writes
	23	* where overwrite is set
	24	*/
	25	if (td_read(td) \|\| (td_write(td) && td->o.overwrite))
	26	new_layout = 1;
ea443657 JA	27	if (td_write(td) && !td->o.overwrite)
ea443657 JA	28	unlink_file = 1;
507a702f	29
ea443657	30	if ((unlink_file \|\| new_layout) && (f->flags & FIO_FILE_EXISTS)) {
7bb48f84 JA	31	if (unlink(f->file_name) < 0) {
	32	td_verror(td, errno, "unlink");
	33	return 1;
	34	}
	35	}
	36
507a702f JA	37	flags = O_WRONLY \| O_CREAT;
	38	if (new_layout)
	39	flags \|= O_TRUNC;
	40
	41	f->fd = open(f->file_name, flags, 0644);
53cdc686	42	if (f->fd < 0) {
e1161c32	43	td_verror(td, errno, "open");
53cdc686 JA	44	return 1;
	45	}
	46
7bb48f84	47	if (ftruncate(f->fd, f->real_file_size) == -1) {
e1161c32	48	td_verror(td, errno, "ftruncate");
53cdc686 JA	49	goto err;
	50	}
	51
e8be2ad7 JA	52	if (!new_layout)
	53	goto done;
	54
7bb48f84	55	if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
e1161c32	56	td_verror(td, errno, "posix_fallocate");
40f8298c JA	57	goto err;
	58	}
	59
2dc1bbeb JA	60	b = malloc(td->o.max_bs[DDIR_WRITE]);
2dc1bbeb JA	61	memset(b, 0, td->o.max_bs[DDIR_WRITE]);
53cdc686	62
7bb48f84	63	left = f->real_file_size;
53cdc686	64	while (left && !td->terminate) {
2dc1bbeb	65	bs = td->o.max_bs[DDIR_WRITE];
53cdc686 JA	66	if (bs > left)
	67	bs = left;
	68
	69	r = write(f->fd, b, bs);
	70
	71	if (r == (int) bs) {
	72	left -= bs;
	73	continue;
	74	} else {
	75	if (r < 0)
e1161c32	76	td_verror(td, errno, "write");
53cdc686	77	else
e1161c32	78	td_verror(td, EIO, "write");
53cdc686 JA	79
	80	break;
	81	}
	82	}
	83
	84	if (td->terminate)
	85	unlink(f->file_name);
2dc1bbeb	86	else if (td->o.create_fsync)
53cdc686 JA	87	fsync(f->fd);
	88
	89	free(b);
507a702f	90	done:
53cdc686 JA	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
7bb48f84	100	static unsigned long long get_rand_file_size(struct thread_data *td)
9c60ce64	101	{
9c60ce64 JA	102	unsigned long long ret;
	103	long r;
	104
9c60ce64	105	r = os_random_long(&td->file_size_state);
7bb48f84	106	ret = td->o.file_size_low + (unsigned long long) ((double) td->o.file_size_high * (r / (RAND_MAX + 1.0)));
2dc1bbeb	107	ret -= (ret % td->o.rw_min_bs);
9c60ce64 JA	108	return ret;
	109	}
	110
53cdc686 JA	111	static int file_size(struct thread_data td, struct fio_file f)
	112	{
	113	struct stat st;
	114
7bb48f84 JA	115	if (fstat(f->fd, &st) == -1) {
	116	td_verror(td, errno, "fstat");
	117	return 1;
	118	}
53cdc686	119
7bb48f84	120	f->real_file_size = st.st_size;
53cdc686 JA	121	return 0;
	122	}
	123
	124	static int bdev_size(struct thread_data td, struct fio_file f)
	125	{
	126	unsigned long long bytes;
	127	int r;
	128
	129	r = blockdev_size(f->fd, &bytes);
	130	if (r) {
e1161c32	131	td_verror(td, r, "blockdev_size");
53cdc686 JA	132	return 1;
	133	}
	134
	135	f->real_file_size = bytes;
53cdc686 JA	136	return 0;
	137	}
	138
	139	static int get_file_size(struct thread_data td, struct fio_file f)
	140	{
	141	int ret = 0;
	142
409b3417 JA	143	if (f->flags & FIO_SIZE_KNOWN)
	144	return 0;
	145
7bb48f84 JA	146	if (f->filetype == FIO_TYPE_FILE)
	147	ret = file_size(td, f);
	148	else if (f->filetype == FIO_TYPE_BD)
53cdc686 JA	149	ret = bdev_size(td, f);
	150	else
	151	f->real_file_size = -1;
	152
	153	if (ret)
	154	return ret;
	155
	156	if (f->file_offset > f->real_file_size) {
2dc1bbeb	157	log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
53cdc686 JA	158	return 1;
	159	}
	160
409b3417	161	f->flags \|= FIO_SIZE_KNOWN;
53cdc686 JA	162	return 0;
	163	}
	164
e5b401d4 JA	165	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	166	{
	167	int ret = 0;
	168
2dc1bbeb	169	if (td->o.odirect)
b5af8293 JA	170	return 0;
b5af8293 JA	171
e5b401d4 JA	172	/*
	173	* FIXME: add blockdev flushing too
	174	*/
b5af8293	175	if (f->mmap)
7bb48f84	176	ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
467d1b6b	177	else if (f->filetype == FIO_TYPE_FILE)
7bb48f84	178	ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
7e0e25c9	179	else if (f->filetype == FIO_TYPE_BD) {
b5af8293	180	ret = blockdev_invalidate_cache(f->fd);
7e0e25c9 JA	181	if (ret < 0 && errno == EACCES && geteuid()) {
	182	log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
	183	ret = 0;
	184	}
	185	} else if (f->filetype == FIO_TYPE_CHAR)
e5b401d4 JA	186	ret = 0;
	187
	188	if (ret < 0) {
e1161c32	189	td_verror(td, errno, "invalidate_cache");
e5b401d4 JA	190	return 1;
	191	}
	192
ad2da605	193	return ret;
e5b401d4 JA	194	}
e5b401d4 JA	195
b5af8293	196	void generic_close_file(struct thread_data fio_unused td, struct fio_file f)
53cdc686	197	{
b5af8293 JA	198	close(f->fd);
b5af8293 JA	199	f->fd = -1;
53cdc686 JA	200	}
53cdc686 JA	201
b5af8293	202	int generic_open_file(struct thread_data td, struct fio_file f)
53cdc686	203	{
53cdc686 JA	204	int flags = 0;
53cdc686 JA	205
2dc1bbeb	206	if (td->o.odirect)
2fd233b7	207	flags \|= OS_O_DIRECT;
2dc1bbeb	208	if (td->o.sync_io)
2fd233b7	209	flags \|= O_SYNC;
53cdc686	210
2fd233b7 JA	211	if (td_write(td) \|\| td_rw(td)) {
2fd233b7 JA	212	flags \|= O_RDWR;
53cdc686	213
af52b345	214	if (f->filetype == FIO_TYPE_FILE)
2fd233b7	215	flags \|= O_CREAT;
2fd233b7	216
b5af8293	217	f->fd = open(f->file_name, flags, 0600);
2fd233b7	218	} else {
af52b345	219	if (f->filetype == FIO_TYPE_CHAR)
2fd233b7 JA	220	flags \|= O_RDWR;
	221	else
	222	flags \|= O_RDONLY;
	223
b5af8293	224	f->fd = open(f->file_name, flags);
53cdc686 JA	225	}
	226
	227	if (f->fd == -1) {
e4e33258	228	char buf[FIO_VERROR_SIZE];
e1161c32 JA	229	int __e = errno;
e1161c32 JA	230
e4e33258 JA	231	snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
	232
	233	td_verror(td, __e, buf);
53cdc686 JA	234	}
53cdc686 JA	235
b5af8293 JA	236	if (get_file_size(td, f))
	237	goto err;
	238
53cdc686	239	return 0;
b5af8293 JA	240	err:
	241	close(f->fd);
	242	return 1;
	243	}
	244
21972cde JA	245	int open_files(struct thread_data *td)
	246	{
	247	struct fio_file *f;
af52b345 JA	248	unsigned int i;
af52b345 JA	249	int err = 0;
21972cde JA	250
21972cde JA	251	for_each_file(td, f, i) {
b5af8293	252	err = td_io_open_file(td, f);
9bf27b45 JA	253	if (err) {
	254	if (td->error == EMFILE) {
	255	log_err("fio: limited open files to: %d\n", td->nr_open_files);
	256	td->o.open_files = td->nr_open_files;
	257	err = 0;
	258	clear_error(td);
	259	}
21972cde	260	break;
9bf27b45	261	}
b5af8293	262
2dc1bbeb	263	if (td->o.open_files == td->nr_open_files)
b5af8293	264	break;
21972cde JA	265	}
21972cde JA	266
7abf833d JA	267	if (!err)
	268	return 0;
	269
bdb4e2e9	270	for_each_file(td, f, i)
b5af8293	271	td_io_close_file(td, f);
7abf833d	272
21972cde JA	273	return err;
	274	}
	275
7bb48f84 JA	276	/*
	277	* open/close all files, so that ->real_file_size gets set
	278	*/
000b0803	279	static void get_file_sizes(struct thread_data *td)
7bb48f84 JA	280	{
	281	struct fio_file *f;
	282	unsigned int i;
7bb48f84 JA	283
7bb48f84 JA	284	for_each_file(td, f, i) {
541d66d7 JA	285	if (td->io_ops->open_file(td, f))
	286	clear_error(td);
	287	else
000b0803	288	td->io_ops->close_file(td, f);
409b3417 JA	289
	290	if (f->real_file_size == -1ULL && td->o.size)
	291	f->real_file_size = td->o.size / td->o.nr_files;
7bb48f84	292	}
7bb48f84 JA	293	}
	294
	295	/*
	296	* Open the files and setup files sizes, creating files if necessary.
	297	*/
53cdc686 JA	298	int setup_files(struct thread_data *td)
53cdc686 JA	299	{
7bb48f84	300	unsigned long long total_size, extend_size;
53cdc686	301	struct fio_file *f;
af52b345	302	unsigned int i;
000b0803	303	int err = 0, need_extend;
53cdc686 JA	304
	305	/*
	306	* if ioengine defines a setup() method, it's responsible for
7bb48f84 JA	307	* opening the files and setting f->real_file_size to indicate
7bb48f84 JA	308	* the valid range for that file.
53cdc686 JA	309	*/
53cdc686 JA	310	if (td->io_ops->setup)
7bb48f84 JA	311	err = td->io_ops->setup(td);
7bb48f84 JA	312	else
000b0803	313	get_file_sizes(td);
53cdc686	314
f1027063 JA	315	if (err)
	316	return err;
	317
0a7eb121	318	/*
7bb48f84 JA	319	* check sizes. if the files/devices do not exist and the size
7bb48f84 JA	320	* isn't passed to fio, abort.
0a7eb121	321	*/
7bb48f84 JA	322	total_size = 0;
	323	for_each_file(td, f, i) {
	324	if (f->real_file_size == -1ULL)
	325	total_size = -1ULL;
	326	else
	327	total_size += f->real_file_size;
	328	}
0a7eb121	329
7bb48f84 JA	330	/*
	331	* device/file sizes are zero and no size given, punt
	332	*/
409b3417	333	if ((!total_size \|\| total_size == -1ULL) && !td->o.size) {
7bb48f84	334	log_err("%s: you need to specify size=\n", td->o.name);
e1161c32	335	td_verror(td, EINVAL, "total_file_size");
53cdc686 JA	336	return 1;
	337	}
	338
7bb48f84 JA	339	/*
	340	* now file sizes are known, so we can set ->io_size. if size= is
	341	* not given, ->io_size is just equal to ->real_file_size. if size
	342	* is given, ->io_size is size / nr_files.
	343	*/
	344	extend_size = total_size = 0;
	345	need_extend = 0;
	346	for_each_file(td, f, i) {
	347	if (!td->o.file_size_low) {
	348	/*
	349	* no file size range given, file size is equal to
	350	* total size divided by number of files. if that is
	351	* zero, set it to the real file size.
	352	*/
	353	f->io_size = td->o.size / td->o.nr_files;
	354	if (!f->io_size)
	355	f->io_size = f->real_file_size;
	356	} else if (f->real_file_size < td->o.file_size_low \|\|
	357	f->real_file_size > td->o.file_size_high) {
	358	/*
	359	* file size given. if it's fixed, use that. if it's a
	360	* range, generate a random size in-between.
	361	*/
	362	if (td->o.file_size_low == td->o.file_size_high)
	363	f->io_size = td->o.file_size_low;
	364	else
	365	f->io_size = get_rand_file_size(td);
	366	} else
	367	f->io_size = f->real_file_size;
53cdc686	368
7bb48f84 JA	369	if (f->io_size == -1ULL)
	370	total_size = -1ULL;
	371	else
	372	total_size += f->io_size;
	373
	374	if (f->filetype == FIO_TYPE_FILE &&
	375	f->io_size > f->real_file_size &&
	376	!(td->io_ops->flags & FIO_DISKLESSIO)) {
	377	need_extend++;
	378	extend_size += f->io_size;
	379	f->flags \|= FIO_FILE_EXTEND;
	380	}
	381	}
53cdc686	382
7bb48f84 JA	383	if (!td->o.size)
7bb48f84 JA	384	td->o.size = total_size;
21972cde	385
7bb48f84 JA	386	/*
	387	* See if we need to extend some files
	388	*/
	389	if (need_extend) {
	390	temp_stall_ts = 1;
	391	log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
	392	td->o.name, need_extend, extend_size >> 20);
	393
	394	for_each_file(td, f, i) {
	395	if (!(f->flags & FIO_FILE_EXTEND))
	396	continue;
	397
409b3417	398	assert(f->filetype == FIO_TYPE_FILE);
7bb48f84 JA	399	f->flags &= ~FIO_FILE_EXTEND;
	400	f->real_file_size = f->io_size;
	401	err = extend_file(td, f);
	402	if (err)
	403	break;
	404	}
	405	temp_stall_ts = 0;
	406	}
	407
	408	if (err)
	409	return err;
	410
	411	if (!td->o.zone_size)
	412	td->o.zone_size = td->o.size;
	413
	414	td->total_io_size = td->o.size * td->o.loops;
	415	return 0;
53cdc686 JA	416	}
53cdc686 JA	417
68727076 JA	418	int init_random_map(struct thread_data *td)
	419	{
	420	int num_maps, blocks;
	421	struct fio_file *f;
	422	unsigned int i;
	423
	424	if (td->o.norandommap)
	425	return 0;
	426
	427	for_each_file(td, f, i) {
	428	blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
	429	num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
	430	f->file_map = malloc(num_maps * sizeof(long));
	431	if (!f->file_map) {
	432	log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
	433	return 1;
	434	}
	435	f->num_maps = num_maps;
	436	memset(f->file_map, 0, num_maps * sizeof(long));
	437	}
	438
	439	return 0;
	440	}
	441
53cdc686 JA	442	void close_files(struct thread_data *td)
53cdc686 JA	443	{
0ab8db89	444	struct fio_file *f;
af52b345	445	unsigned int i;
53cdc686	446
0ab8db89	447	for_each_file(td, f, i) {
fa1da865 JA	448	if ((f->flags & FIO_FILE_UNLINK) &&
fa1da865 JA	449	f->filetype == FIO_TYPE_FILE)
132ad46d	450	unlink(f->file_name);
bdb4e2e9	451
b5af8293	452	td_io_close_file(td, f);
b3dc7f07	453
fa1da865 JA	454	free(f->file_name);
	455	f->file_name = NULL;
	456
c343981b	457	if (f->file_map) {
b3dc7f07	458	free(f->file_map);
c343981b JA	459	f->file_map = NULL;
c343981b JA	460	}
53cdc686	461	}
b4a6a59a	462
2dc1bbeb	463	td->o.filename = NULL;
cade3ef4	464	free(td->files);
b4a6a59a	465	td->files = NULL;
2dc1bbeb	466	td->o.nr_files = 0;
53cdc686	467	}
af52b345	468
e3bab463	469	static void get_file_type(struct fio_file *f)
af52b345 JA	470	{
	471	struct stat sb;
	472
	473	f->filetype = FIO_TYPE_FILE;
	474
e3bab463	475	if (!lstat(f->file_name, &sb)) {
af52b345 JA	476	if (S_ISBLK(sb.st_mode))
	477	f->filetype = FIO_TYPE_BD;
	478	else if (S_ISCHR(sb.st_mode))
	479	f->filetype = FIO_TYPE_CHAR;
	480	}
	481	}
	482
	483	void add_file(struct thread_data td, const char fname)
	484	{
7b4e4fe5	485	int cur_files = td->files_index;
bd0ee748	486	char file_name[PATH_MAX];
af52b345	487	struct fio_file *f;
bd0ee748	488	int len = 0;
af52b345 JA	489
	490	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
	491
	492	f = &td->files[cur_files];
	493	memset(f, 0, sizeof(*f));
	494	f->fd = -1;
bd0ee748 JA	495
	496	if (td->o.directory)
	497	len = sprintf(file_name, "%s/", td->o.directory);
	498
	499	sprintf(file_name + len, "%s", fname);
	500	f->file_name = strdup(file_name);
af52b345	501
e3bab463	502	get_file_type(f);
af52b345	503
7b4e4fe5	504	td->files_index++;
1549441c JA	505	if (f->filetype == FIO_TYPE_FILE)
1549441c JA	506	td->nr_normal_files++;
af52b345	507	}
0ad920e7 JA	508
	509	void get_file(struct fio_file *f)
	510	{
	511	f->references++;
	512	}
	513
	514	void put_file(struct thread_data td, struct fio_file f)
	515	{
	516	if (!(f->flags & FIO_FILE_OPEN))
	517	return;
	518
	519	assert(f->references);
	520	if (--f->references)
	521	return;
	522
2dc1bbeb	523	if (should_fsync(td) && td->o.fsync_on_close)
ebb1415f JA	524	fsync(f->fd);
ebb1415f JA	525
0ad920e7 JA	526	if (td->io_ops->close_file)
0ad920e7 JA	527	td->io_ops->close_file(td, f);
1020a139	528
0ad920e7 JA	529	td->nr_open_files--;
	530	f->flags &= ~FIO_FILE_OPEN;
	531	}
bbf6b540 JA	532
	533	static int recurse_dir(struct thread_data td, const char dirname)
	534	{
	535	struct dirent *dir;
	536	int ret = 0;
	537	DIR *D;
	538
	539	D = opendir(dirname);
	540	if (!D) {
0ddb270c JA	541	char buf[FIO_VERROR_SIZE];
	542
	543	snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
	544	td_verror(td, errno, buf);
bbf6b540 JA	545	return 1;
	546	}
	547
	548	while ((dir = readdir(D)) != NULL) {
	549	char full_path[PATH_MAX];
	550	struct stat sb;
	551
e85b2b83 JA	552	if (!strcmp(dir->d_name, ".") \|\| !strcmp(dir->d_name, ".."))
e85b2b83 JA	553	continue;
96d32d51	554
bbf6b540 JA	555	sprintf(full_path, "%s/%s", dirname, dir->d_name);
	556
	557	if (lstat(full_path, &sb) == -1) {
	558	if (errno != ENOENT) {
	559	td_verror(td, errno, "stat");
	560	return 1;
	561	}
	562	}
	563
	564	if (S_ISREG(sb.st_mode)) {
	565	add_file(td, full_path);
2dc1bbeb	566	td->o.nr_files++;
bbf6b540 JA	567	continue;
bbf6b540 JA	568	}
0ddb270c JA	569	if (!S_ISDIR(sb.st_mode))
0ddb270c JA	570	continue;
bbf6b540	571
bbf6b540 JA	572	if ((ret = recurse_dir(td, full_path)) != 0)
	573	break;
	574	}
	575
	576	closedir(D);
	577	return ret;
	578	}
	579
	580	int add_dir_files(struct thread_data td, const char path)
	581	{
0ddb270c JA	582	int ret = recurse_dir(td, path);
	583
	584	if (!ret)
	585	log_info("fio: opendir added %d files\n", td->o.nr_files);
	586
	587	return ret;
bbf6b540	588	}
cade3ef4 JA	589
	590	void dup_files(struct thread_data td, struct thread_data org)
	591	{
	592	struct fio_file *f;
	593	unsigned int i;
	594	size_t bytes;
	595
	596	if (!org->files)
	597	return;
	598
	599	bytes = org->files_index * sizeof(*f);
	600	td->files = malloc(bytes);
	601	memcpy(td->files, org->files, bytes);
	602
	603	for_each_file(td, f, i) {
	604	if (f->file_name)
	605	f->file_name = strdup(f->file_name);
	606	}
	607	}