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

	if (!new_layout)
		goto done;

	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->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;
	}

	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)) {
			td->error = 0;
			memset(td->verror, 0, sizeof(td->verror));
		} else
			td->io_ops->close_file(td, f);
	}
}

/*
 * 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 && !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;

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