[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"

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

	for_each_file(td, f, i) {
		if (td->io_ops->open_file(td, f)) {
			if (td->error != ENOENT) {
				log_err("%s\n", td->verror);
				err = 1;
			}
			clear_error(td);
		} else {
			if (td->io_ops->close_file)
				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;
	}

	return err;
}

/*
 * 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
		err = 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;

	/*
	 * init function, io engine may not be loaded yet
	 */
	if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
		f->real_file_size = -1ULL;

	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
53cdc686 JA	10	#include "fio.h"
53cdc686	11
7bb48f84	12	static int extend_file(struct thread_data td, struct fio_file f)
25205e97	13	{
ea443657	14	int r, new_layout = 0, unlink_file = 0, flags;
25205e97 JA	15	unsigned long long left;
	16	unsigned int bs;
	17	char *b;
b2a15192	18
507a702f JA	19	/*
	20	* check if we need to lay the file out complete again. fio
	21	* does that for operations involving reads, or for writes
	22	* where overwrite is set
	23	*/
	24	if (td_read(td) \|\| (td_write(td) && td->o.overwrite))
	25	new_layout = 1;
ea443657 JA	26	if (td_write(td) && !td->o.overwrite)
ea443657 JA	27	unlink_file = 1;
507a702f	28
ea443657	29	if ((unlink_file \|\| new_layout) && (f->flags & FIO_FILE_EXISTS)) {
7bb48f84 JA	30	if (unlink(f->file_name) < 0) {
	31	td_verror(td, errno, "unlink");
	32	return 1;
	33	}
	34	}
	35
507a702f JA	36	flags = O_WRONLY \| O_CREAT;
	37	if (new_layout)
	38	flags \|= O_TRUNC;
	39
	40	f->fd = open(f->file_name, flags, 0644);
53cdc686	41	if (f->fd < 0) {
e1161c32	42	td_verror(td, errno, "open");
53cdc686 JA	43	return 1;
	44	}
	45
7bb48f84	46	if (ftruncate(f->fd, f->real_file_size) == -1) {
e1161c32	47	td_verror(td, errno, "ftruncate");
53cdc686 JA	48	goto err;
	49	}
	50
e8be2ad7 JA	51	if (!new_layout)
	52	goto done;
	53
7bb48f84	54	if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
e1161c32	55	td_verror(td, errno, "posix_fallocate");
40f8298c JA	56	goto err;
	57	}
	58
2dc1bbeb JA	59	b = malloc(td->o.max_bs[DDIR_WRITE]);
2dc1bbeb JA	60	memset(b, 0, td->o.max_bs[DDIR_WRITE]);
53cdc686	61
7bb48f84	62	left = f->real_file_size;
53cdc686	63	while (left && !td->terminate) {
2dc1bbeb	64	bs = td->o.max_bs[DDIR_WRITE];
53cdc686 JA	65	if (bs > left)
	66	bs = left;
	67
	68	r = write(f->fd, b, bs);
	69
	70	if (r == (int) bs) {
	71	left -= bs;
	72	continue;
	73	} else {
	74	if (r < 0)
e1161c32	75	td_verror(td, errno, "write");
53cdc686	76	else
e1161c32	77	td_verror(td, EIO, "write");
53cdc686 JA	78
	79	break;
	80	}
	81	}
	82
	83	if (td->terminate)
	84	unlink(f->file_name);
2dc1bbeb	85	else if (td->o.create_fsync)
53cdc686 JA	86	fsync(f->fd);
	87
	88	free(b);
507a702f	89	done:
53cdc686 JA	90	close(f->fd);
	91	f->fd = -1;
	92	return 0;
	93	err:
	94	close(f->fd);
	95	f->fd = -1;
	96	return 1;
	97	}
	98
7bb48f84	99	static unsigned long long get_rand_file_size(struct thread_data *td)
9c60ce64	100	{
9c60ce64 JA	101	unsigned long long ret;
	102	long r;
	103
9c60ce64	104	r = os_random_long(&td->file_size_state);
7bb48f84	105	ret = td->o.file_size_low + (unsigned long long) ((double) td->o.file_size_high * (r / (RAND_MAX + 1.0)));
2dc1bbeb	106	ret -= (ret % td->o.rw_min_bs);
9c60ce64 JA	107	return ret;
	108	}
	109
53cdc686 JA	110	static int file_size(struct thread_data td, struct fio_file f)
	111	{
	112	struct stat st;
	113
7bb48f84 JA	114	if (fstat(f->fd, &st) == -1) {
	115	td_verror(td, errno, "fstat");
	116	return 1;
	117	}
53cdc686	118
7bb48f84	119	f->real_file_size = st.st_size;
53cdc686 JA	120	return 0;
	121	}
	122
	123	static int bdev_size(struct thread_data td, struct fio_file f)
	124	{
	125	unsigned long long bytes;
	126	int r;
	127
	128	r = blockdev_size(f->fd, &bytes);
	129	if (r) {
e1161c32	130	td_verror(td, r, "blockdev_size");
53cdc686 JA	131	return 1;
	132	}
	133
	134	f->real_file_size = bytes;
53cdc686 JA	135	return 0;
	136	}
	137
	138	static int get_file_size(struct thread_data td, struct fio_file f)
	139	{
	140	int ret = 0;
	141
409b3417 JA	142	if (f->flags & FIO_SIZE_KNOWN)
	143	return 0;
	144
7bb48f84 JA	145	if (f->filetype == FIO_TYPE_FILE)
	146	ret = file_size(td, f);
	147	else if (f->filetype == FIO_TYPE_BD)
53cdc686 JA	148	ret = bdev_size(td, f);
	149	else
	150	f->real_file_size = -1;
	151
	152	if (ret)
	153	return ret;
	154
	155	if (f->file_offset > f->real_file_size) {
2dc1bbeb	156	log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
53cdc686 JA	157	return 1;
	158	}
	159
409b3417	160	f->flags \|= FIO_SIZE_KNOWN;
53cdc686 JA	161	return 0;
	162	}
	163
e5b401d4 JA	164	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	165	{
	166	int ret = 0;
	167
2dc1bbeb	168	if (td->o.odirect)
b5af8293 JA	169	return 0;
b5af8293 JA	170
e5b401d4 JA	171	/*
	172	* FIXME: add blockdev flushing too
	173	*/
b5af8293	174	if (f->mmap)
7bb48f84	175	ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
467d1b6b	176	else if (f->filetype == FIO_TYPE_FILE)
7bb48f84	177	ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
7e0e25c9	178	else if (f->filetype == FIO_TYPE_BD) {
b5af8293	179	ret = blockdev_invalidate_cache(f->fd);
7e0e25c9 JA	180	if (ret < 0 && errno == EACCES && geteuid()) {
	181	log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
	182	ret = 0;
	183	}
	184	} else if (f->filetype == FIO_TYPE_CHAR)
e5b401d4 JA	185	ret = 0;
	186
	187	if (ret < 0) {
e1161c32	188	td_verror(td, errno, "invalidate_cache");
e5b401d4 JA	189	return 1;
	190	}
	191
ad2da605	192	return ret;
e5b401d4 JA	193	}
e5b401d4 JA	194
b5af8293	195	void generic_close_file(struct thread_data fio_unused td, struct fio_file f)
53cdc686	196	{
b5af8293 JA	197	close(f->fd);
b5af8293 JA	198	f->fd = -1;
53cdc686 JA	199	}
53cdc686 JA	200
b5af8293	201	int generic_open_file(struct thread_data td, struct fio_file f)
53cdc686	202	{
53cdc686 JA	203	int flags = 0;
53cdc686 JA	204
2dc1bbeb	205	if (td->o.odirect)
2fd233b7	206	flags \|= OS_O_DIRECT;
2dc1bbeb	207	if (td->o.sync_io)
2fd233b7	208	flags \|= O_SYNC;
53cdc686	209
2fd233b7 JA	210	if (td_write(td) \|\| td_rw(td)) {
2fd233b7 JA	211	flags \|= O_RDWR;
53cdc686	212
af52b345	213	if (f->filetype == FIO_TYPE_FILE)
2fd233b7	214	flags \|= O_CREAT;
2fd233b7	215
b5af8293	216	f->fd = open(f->file_name, flags, 0600);
2fd233b7	217	} else {
af52b345	218	if (f->filetype == FIO_TYPE_CHAR)
2fd233b7 JA	219	flags \|= O_RDWR;
	220	else
	221	flags \|= O_RDONLY;
	222
b5af8293	223	f->fd = open(f->file_name, flags);
53cdc686 JA	224	}
	225
	226	if (f->fd == -1) {
e4e33258	227	char buf[FIO_VERROR_SIZE];
e1161c32 JA	228	int __e = errno;
e1161c32 JA	229
e4e33258 JA	230	snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
	231
	232	td_verror(td, __e, buf);
53cdc686 JA	233	}
53cdc686 JA	234
b5af8293 JA	235	if (get_file_size(td, f))
	236	goto err;
	237
53cdc686	238	return 0;
b5af8293 JA	239	err:
	240	close(f->fd);
	241	return 1;
	242	}
	243
21972cde JA	244	int open_files(struct thread_data *td)
	245	{
	246	struct fio_file *f;
af52b345 JA	247	unsigned int i;
af52b345 JA	248	int err = 0;
21972cde JA	249
21972cde JA	250	for_each_file(td, f, i) {
b5af8293	251	err = td_io_open_file(td, f);
9bf27b45 JA	252	if (err) {
	253	if (td->error == EMFILE) {
	254	log_err("fio: limited open files to: %d\n", td->nr_open_files);
	255	td->o.open_files = td->nr_open_files;
	256	err = 0;
	257	clear_error(td);
	258	}
21972cde	259	break;
9bf27b45	260	}
b5af8293	261
2dc1bbeb	262	if (td->o.open_files == td->nr_open_files)
b5af8293	263	break;
21972cde JA	264	}
21972cde JA	265
7abf833d JA	266	if (!err)
	267	return 0;
	268
bdb4e2e9	269	for_each_file(td, f, i)
b5af8293	270	td_io_close_file(td, f);
7abf833d	271
21972cde JA	272	return err;
	273	}
	274
7bb48f84 JA	275	/*
	276	* open/close all files, so that ->real_file_size gets set
	277	*/
bab3fd58	278	static int get_file_sizes(struct thread_data *td)
7bb48f84 JA	279	{
	280	struct fio_file *f;
	281	unsigned int i;
bab3fd58	282	int err = 0;
7bb48f84 JA	283
7bb48f84 JA	284	for_each_file(td, f, i) {
bab3fd58	285	if (td->io_ops->open_file(td, f)) {
40b44f4a JA	286	if (td->error != ENOENT) {
	287	log_err("%s\n", td->verror);
	288	err = 1;
	289	}
541d66d7	290	clear_error(td);
07eb79df JA	291	} else {
	292	if (td->io_ops->close_file)
	293	td->io_ops->close_file(td, f);
	294	}
409b3417 JA	295
	296	if (f->real_file_size == -1ULL && td->o.size)
	297	f->real_file_size = td->o.size / td->o.nr_files;
7bb48f84	298	}
bab3fd58 JA	299
bab3fd58 JA	300	return err;
7bb48f84 JA	301	}
	302
	303	/*
	304	* Open the files and setup files sizes, creating files if necessary.
	305	*/
53cdc686 JA	306	int setup_files(struct thread_data *td)
53cdc686 JA	307	{
7bb48f84	308	unsigned long long total_size, extend_size;
53cdc686	309	struct fio_file *f;
af52b345	310	unsigned int i;
000b0803	311	int err = 0, need_extend;
53cdc686 JA	312
	313	/*
	314	* if ioengine defines a setup() method, it's responsible for
7bb48f84 JA	315	* opening the files and setting f->real_file_size to indicate
7bb48f84 JA	316	* the valid range for that file.
53cdc686 JA	317	*/
53cdc686 JA	318	if (td->io_ops->setup)
7bb48f84 JA	319	err = td->io_ops->setup(td);
7bb48f84 JA	320	else
bab3fd58	321	err = get_file_sizes(td);
53cdc686	322
f1027063 JA	323	if (err)
	324	return err;
	325
0a7eb121	326	/*
7bb48f84 JA	327	* check sizes. if the files/devices do not exist and the size
7bb48f84 JA	328	* isn't passed to fio, abort.
0a7eb121	329	*/
7bb48f84 JA	330	total_size = 0;
	331	for_each_file(td, f, i) {
	332	if (f->real_file_size == -1ULL)
	333	total_size = -1ULL;
	334	else
	335	total_size += f->real_file_size;
	336	}
0a7eb121	337
7bb48f84 JA	338	/*
	339	* device/file sizes are zero and no size given, punt
	340	*/
409b3417	341	if ((!total_size \|\| total_size == -1ULL) && !td->o.size) {
7bb48f84	342	log_err("%s: you need to specify size=\n", td->o.name);
e1161c32	343	td_verror(td, EINVAL, "total_file_size");
53cdc686 JA	344	return 1;
	345	}
	346
7bb48f84 JA	347	/*
	348	* now file sizes are known, so we can set ->io_size. if size= is
	349	* not given, ->io_size is just equal to ->real_file_size. if size
	350	* is given, ->io_size is size / nr_files.
	351	*/
	352	extend_size = total_size = 0;
	353	need_extend = 0;
	354	for_each_file(td, f, i) {
	355	if (!td->o.file_size_low) {
	356	/*
	357	* no file size range given, file size is equal to
	358	* total size divided by number of files. if that is
	359	* zero, set it to the real file size.
	360	*/
	361	f->io_size = td->o.size / td->o.nr_files;
	362	if (!f->io_size)
	363	f->io_size = f->real_file_size;
	364	} else if (f->real_file_size < td->o.file_size_low \|\|
	365	f->real_file_size > td->o.file_size_high) {
	366	/*
	367	* file size given. if it's fixed, use that. if it's a
	368	* range, generate a random size in-between.
	369	*/
	370	if (td->o.file_size_low == td->o.file_size_high)
	371	f->io_size = td->o.file_size_low;
	372	else
	373	f->io_size = get_rand_file_size(td);
	374	} else
	375	f->io_size = f->real_file_size;
53cdc686	376
7bb48f84 JA	377	if (f->io_size == -1ULL)
	378	total_size = -1ULL;
	379	else
	380	total_size += f->io_size;
	381
	382	if (f->filetype == FIO_TYPE_FILE &&
	383	f->io_size > f->real_file_size &&
	384	!(td->io_ops->flags & FIO_DISKLESSIO)) {
	385	need_extend++;
	386	extend_size += f->io_size;
	387	f->flags \|= FIO_FILE_EXTEND;
	388	}
	389	}
53cdc686	390
7bb48f84 JA	391	if (!td->o.size)
7bb48f84 JA	392	td->o.size = total_size;
21972cde	393
7bb48f84 JA	394	/*
	395	* See if we need to extend some files
	396	*/
	397	if (need_extend) {
	398	temp_stall_ts = 1;
	399	log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
	400	td->o.name, need_extend, extend_size >> 20);
	401
	402	for_each_file(td, f, i) {
	403	if (!(f->flags & FIO_FILE_EXTEND))
	404	continue;
	405
409b3417	406	assert(f->filetype == FIO_TYPE_FILE);
7bb48f84 JA	407	f->flags &= ~FIO_FILE_EXTEND;
	408	f->real_file_size = f->io_size;
	409	err = extend_file(td, f);
	410	if (err)
	411	break;
	412	}
	413	temp_stall_ts = 0;
	414	}
	415
	416	if (err)
	417	return err;
	418
	419	if (!td->o.zone_size)
	420	td->o.zone_size = td->o.size;
	421
	422	td->total_io_size = td->o.size * td->o.loops;
	423	return 0;
53cdc686 JA	424	}
53cdc686 JA	425
68727076 JA	426	int init_random_map(struct thread_data *td)
	427	{
	428	int num_maps, blocks;
	429	struct fio_file *f;
	430	unsigned int i;
	431
	432	if (td->o.norandommap)
	433	return 0;
	434
	435	for_each_file(td, f, i) {
	436	blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
	437	num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
	438	f->file_map = malloc(num_maps * sizeof(long));
	439	if (!f->file_map) {
	440	log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
	441	return 1;
	442	}
	443	f->num_maps = num_maps;
	444	memset(f->file_map, 0, num_maps * sizeof(long));
	445	}
	446
	447	return 0;
	448	}
	449
53cdc686 JA	450	void close_files(struct thread_data *td)
53cdc686 JA	451	{
0ab8db89	452	struct fio_file *f;
af52b345	453	unsigned int i;
53cdc686	454
0ab8db89	455	for_each_file(td, f, i) {
fa1da865 JA	456	if ((f->flags & FIO_FILE_UNLINK) &&
fa1da865 JA	457	f->filetype == FIO_TYPE_FILE)
132ad46d	458	unlink(f->file_name);
bdb4e2e9	459
b5af8293	460	td_io_close_file(td, f);
b3dc7f07	461
fa1da865 JA	462	free(f->file_name);
	463	f->file_name = NULL;
	464
c343981b	465	if (f->file_map) {
b3dc7f07	466	free(f->file_map);
c343981b JA	467	f->file_map = NULL;
c343981b JA	468	}
53cdc686	469	}
b4a6a59a	470
2dc1bbeb	471	td->o.filename = NULL;
cade3ef4	472	free(td->files);
b4a6a59a	473	td->files = NULL;
2dc1bbeb	474	td->o.nr_files = 0;
53cdc686	475	}
af52b345	476
e3bab463	477	static void get_file_type(struct fio_file *f)
af52b345 JA	478	{
	479	struct stat sb;
	480
	481	f->filetype = FIO_TYPE_FILE;
	482
e3bab463	483	if (!lstat(f->file_name, &sb)) {
af52b345 JA	484	if (S_ISBLK(sb.st_mode))
	485	f->filetype = FIO_TYPE_BD;
	486	else if (S_ISCHR(sb.st_mode))
	487	f->filetype = FIO_TYPE_CHAR;
	488	}
	489	}
	490
	491	void add_file(struct thread_data td, const char fname)
	492	{
7b4e4fe5	493	int cur_files = td->files_index;
bd0ee748	494	char file_name[PATH_MAX];
af52b345	495	struct fio_file *f;
bd0ee748	496	int len = 0;
af52b345 JA	497
	498	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
	499
	500	f = &td->files[cur_files];
	501	memset(f, 0, sizeof(*f));
	502	f->fd = -1;
bd0ee748	503
07eb79df JA	504	/*
	505	* init function, io engine may not be loaded yet
	506	*/
	507	if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
	508	f->real_file_size = -1ULL;
	509
bd0ee748 JA	510	if (td->o.directory)
	511	len = sprintf(file_name, "%s/", td->o.directory);
	512
	513	sprintf(file_name + len, "%s", fname);
	514	f->file_name = strdup(file_name);
af52b345	515
e3bab463	516	get_file_type(f);
af52b345	517
7b4e4fe5	518	td->files_index++;
1549441c JA	519	if (f->filetype == FIO_TYPE_FILE)
1549441c JA	520	td->nr_normal_files++;
af52b345	521	}
0ad920e7 JA	522
	523	void get_file(struct fio_file *f)
	524	{
	525	f->references++;
	526	}
	527
	528	void put_file(struct thread_data td, struct fio_file f)
	529	{
	530	if (!(f->flags & FIO_FILE_OPEN))
	531	return;
	532
	533	assert(f->references);
	534	if (--f->references)
	535	return;
	536
2dc1bbeb	537	if (should_fsync(td) && td->o.fsync_on_close)
ebb1415f JA	538	fsync(f->fd);
ebb1415f JA	539
0ad920e7 JA	540	if (td->io_ops->close_file)
0ad920e7 JA	541	td->io_ops->close_file(td, f);
1020a139	542
0ad920e7 JA	543	td->nr_open_files--;
	544	f->flags &= ~FIO_FILE_OPEN;
	545	}
bbf6b540 JA	546
	547	static int recurse_dir(struct thread_data td, const char dirname)
	548	{
	549	struct dirent *dir;
	550	int ret = 0;
	551	DIR *D;
	552
	553	D = opendir(dirname);
	554	if (!D) {
0ddb270c JA	555	char buf[FIO_VERROR_SIZE];
	556
	557	snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
	558	td_verror(td, errno, buf);
bbf6b540 JA	559	return 1;
	560	}
	561
	562	while ((dir = readdir(D)) != NULL) {
	563	char full_path[PATH_MAX];
	564	struct stat sb;
	565
e85b2b83 JA	566	if (!strcmp(dir->d_name, ".") \|\| !strcmp(dir->d_name, ".."))
e85b2b83 JA	567	continue;
96d32d51	568
bbf6b540 JA	569	sprintf(full_path, "%s/%s", dirname, dir->d_name);
	570
	571	if (lstat(full_path, &sb) == -1) {
	572	if (errno != ENOENT) {
	573	td_verror(td, errno, "stat");
	574	return 1;
	575	}
	576	}
	577
	578	if (S_ISREG(sb.st_mode)) {
	579	add_file(td, full_path);
2dc1bbeb	580	td->o.nr_files++;
bbf6b540 JA	581	continue;
bbf6b540 JA	582	}
0ddb270c JA	583	if (!S_ISDIR(sb.st_mode))
0ddb270c JA	584	continue;
bbf6b540	585
bbf6b540 JA	586	if ((ret = recurse_dir(td, full_path)) != 0)
	587	break;
	588	}
	589
	590	closedir(D);
	591	return ret;
	592	}
	593
	594	int add_dir_files(struct thread_data td, const char path)
	595	{
0ddb270c JA	596	int ret = recurse_dir(td, path);
	597
	598	if (!ret)
	599	log_info("fio: opendir added %d files\n", td->o.nr_files);
	600
	601	return ret;
bbf6b540	602	}
cade3ef4 JA	603
	604	void dup_files(struct thread_data td, struct thread_data org)
	605	{
	606	struct fio_file *f;
	607	unsigned int i;
	608	size_t bytes;
	609
	610	if (!org->files)
	611	return;
	612
	613	bytes = org->files_index * sizeof(*f);
	614	td->files = malloc(bytes);
	615	memcpy(td->files, org->files, bytes);
	616
	617	for_each_file(td, f, i) {
	618	if (f->file_name)
	619	f->file_name = strdup(f->file_name);
	620	}
	621	}