[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 (f->flags & FIO_FILE_EXISTS) {
			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) {
		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) {
		int __e = errno;

		td_verror(td, __e, "open");
		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_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->file_name && (f->flags & FIO_FILE_UNLINK) &&
		    f->filetype == FIO_TYPE_FILE) {
			unlink(f->file_name);
			free(f->file_name);
			f->file_name = NULL;
		}

		td_io_close_file(td, f);

		if (f->file_map)
			free(f->file_map);
	}

	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;
	struct fio_file *f;

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

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

	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
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
25205e97 JA	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)
53cdc686	17	{
b2a15192	18	struct stat st;
53cdc686	19
af52b345	20	if (f->filetype != FIO_TYPE_FILE \|\|
b5af8293	21	(td->io_ops->flags & FIO_DISKLESSIO))
b2a15192 JA	22	return 0;
b2a15192 JA	23
fa01d139	24	if (lstat(f->file_name, &st) == -1)
25205e97	25	return 1;
fa01d139 JA	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)
25205e97 JA	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;
b2a15192	44
53cdc686 JA	45	f->fd = open(f->file_name, O_WRONLY \| O_CREAT \| O_TRUNC, 0644);
53cdc686 JA	46	if (f->fd < 0) {
e1161c32	47	td_verror(td, errno, "open");
53cdc686 JA	48	return 1;
	49	}
	50
	51	if (ftruncate(f->fd, f->file_size) == -1) {
e1161c32	52	td_verror(td, errno, "ftruncate");
53cdc686 JA	53	goto err;
	54	}
	55
40f8298c	56	if (posix_fallocate(f->fd, 0, f->file_size) < 0) {
e1161c32	57	td_verror(td, errno, "posix_fallocate");
40f8298c JA	58	goto err;
	59	}
	60
2dc1bbeb JA	61	b = malloc(td->o.max_bs[DDIR_WRITE]);
2dc1bbeb JA	62	memset(b, 0, td->o.max_bs[DDIR_WRITE]);
53cdc686 JA	63
	64	left = f->file_size;
	65	while (left && !td->terminate) {
2dc1bbeb	66	bs = td->o.max_bs[DDIR_WRITE];
53cdc686 JA	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)
e1161c32	77	td_verror(td, errno, "write");
53cdc686	78	else
e1161c32	79	td_verror(td, EIO, "write");
53cdc686 JA	80
	81	break;
	82	}
	83	}
	84
	85	if (td->terminate)
	86	unlink(f->file_name);
2dc1bbeb	87	else if (td->o.create_fsync)
53cdc686 JA	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
9c60ce64 JA	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
2dc1bbeb JA	107	if (upper > td->o.file_size_high)
	108	upper = td->o.file_size_high;
	109	else if (upper < td->o.file_size_low)
9c60ce64 JA	110	return 0;
	111	else if (!upper)
	112	return 0;
	113
	114	r = os_random_long(&td->file_size_state);
2dc1bbeb JA	115	ret = td->o.file_size_low + (unsigned long long) ((double) upper * (r / (RAND_MAX + 1.0)));
2dc1bbeb JA	116	ret -= (ret % td->o.rw_min_bs);
9c60ce64 JA	117	if (ret > upper)
	118	ret = upper;
	119	return ret;
	120	}
	121
68727076 JA	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
53cdc686 JA	144	static int create_files(struct thread_data *td)
	145	{
	146	struct fio_file *f;
af52b345	147	int err, need_create, can_extend;
e8be395b	148	unsigned long long total_file_size, local_file_size, create_size;
e407bec2	149	unsigned int i, new_files;
53cdc686	150
e407bec2	151	new_files = 0;
2dc1bbeb	152	total_file_size = td->o.size;
1549441c	153	for_each_file(td, f, i) {
96d32d51 JA	154	unsigned long long s;
96d32d51 JA	155
2dc1bbeb	156	f->file_offset = td->o.start_offset;
96d32d51	157
1549441c JA	158	if (f->filetype != FIO_TYPE_FILE)
	159	continue;
	160
96d32d51 JA	161	if (f->flags & FIO_FILE_EXISTS) {
	162	s = f->file_size;
	163	if (s > total_file_size)
	164	s = total_file_size;
	165
	166	total_file_size -= s;
e407bec2 JA	167	} else
e407bec2 JA	168	new_files++;
1549441c	169	}
f697125a	170
53cdc686 JA	171	/*
	172	* unless specifically asked for overwrite, let normal io extend it
	173	*/
2dc1bbeb	174	can_extend = !td->o.overwrite && !(td->io_ops->flags & FIO_NOEXTEND);
68727076 JA	175	if (can_extend) {
	176	for_each_file(td, f, i) {
	177	if (fill_file_size(td, f, &total_file_size, new_files)) {
	178	log_info("fio: limited to %d files\n", i);
	179	td->o.nr_files = i;
	180	break;
	181	}
	182	}
	183
53cdc686	184	return 0;
68727076	185	}
53cdc686	186
9c60ce64 JA	187	local_file_size = total_file_size;
	188	if (!local_file_size)
	189	local_file_size = -1;
	190
f4c4f4d7 JA	191	total_file_size = 0;
f4c4f4d7 JA	192	need_create = 0;
e8be395b	193	create_size = 0;
af52b345 JA	194	for_each_file(td, f, i) {
	195	int file_there;
	196
	197	if (f->filetype != FIO_TYPE_FILE)
	198	continue;
f4c4f4d7 JA	199	if (f->flags & FIO_FILE_EXISTS) {
f4c4f4d7 JA	200	total_file_size += f->file_size;
96d32d51	201	continue;
f4c4f4d7	202	}
96d32d51	203
68727076 JA	204	if (fill_file_size(td, f, &local_file_size, new_files)) {
	205	log_info("fio: limited to %d files\n", i);
	206	new_files -= (td->o.nr_files - i);
	207	td->o.nr_files = i;
	208	break;
9c60ce64	209	}
eff6861d	210
f4c4f4d7	211	total_file_size += f->file_size;
e8be395b	212	create_size += f->file_size;
af52b345	213	file_there = !file_ok(td, f);
eff6861d	214
2dc1bbeb	215	if (file_there && td_write(td) && !td->o.overwrite) {
af52b345 JA	216	unlink(f->file_name);
af52b345 JA	217	file_there = 0;
eff6861d	218	}
af52b345 JA	219
af52b345 JA	220	need_create += !file_there;
eff6861d	221	}
25205e97	222
25205e97 JA	223	if (!need_create)
	224	return 0;
	225
2dc1bbeb	226	if (!td->o.size && !total_file_size) {
f1027063	227	log_err("Need size for create\n");
e1161c32	228	td_verror(td, EINVAL, "file_size");
f1027063 JA	229	return 1;
	230	}
	231
53cdc686	232	temp_stall_ts = 1;
6d86144d	233	log_info("%s: Laying out IO file(s) (%u files / %LuMiB)\n",
2dc1bbeb	234	td->o.name, new_files, create_size >> 20);
53cdc686 JA	235
	236	err = 0;
	237	for_each_file(td, f, i) {
9b031dc8 JA	238	/*
	239	* Only unlink files that we created.
	240	*/
f11bd94d	241	f->flags &= ~FIO_FILE_UNLINK;
25205e97	242	if (file_ok(td, f)) {
2dc1bbeb	243	if (td->o.unlink)
f11bd94d JA	244	f->flags \|= FIO_FILE_UNLINK;
f11bd94d JA	245
25205e97 JA	246	err = create_file(td, f);
	247	if (err)
	248	break;
	249	}
53cdc686 JA	250	}
	251
	252	temp_stall_ts = 0;
	253	return err;
	254	}
	255
	256	static int file_size(struct thread_data td, struct fio_file f)
	257	{
	258	struct stat st;
	259
2dc1bbeb	260	if (td->o.overwrite) {
53cdc686	261	if (fstat(f->fd, &st) == -1) {
e1161c32	262	td_verror(td, errno, "fstat");
53cdc686 JA	263	return 1;
	264	}
	265
	266	f->real_file_size = st.st_size;
	267
	268	if (!f->file_size \|\| f->file_size > f->real_file_size)
	269	f->file_size = f->real_file_size;
745508dd JA	270	} else
745508dd JA	271	f->real_file_size = f->file_size;
53cdc686	272
53cdc686 JA	273	return 0;
	274	}
	275
	276	static int bdev_size(struct thread_data td, struct fio_file f)
	277	{
	278	unsigned long long bytes;
	279	int r;
	280
	281	r = blockdev_size(f->fd, &bytes);
	282	if (r) {
e1161c32	283	td_verror(td, r, "blockdev_size");
53cdc686 JA	284	return 1;
	285	}
	286
	287	f->real_file_size = bytes;
	288
	289	/*
	290	* no extend possibilities, so limit size to device size if too large
	291	*/
	292	if (!f->file_size \|\| f->file_size > f->real_file_size)
	293	f->file_size = f->real_file_size;
	294
	295	f->file_size -= f->file_offset;
	296	return 0;
	297	}
	298
	299	static int get_file_size(struct thread_data td, struct fio_file f)
	300	{
	301	int ret = 0;
	302
96d32d51 JA	303	if (f->filetype == FIO_TYPE_FILE) {
	304	if (!(f->flags & FIO_FILE_EXISTS))
	305	ret = file_size(td, f);
	306	} else if (f->filetype == FIO_TYPE_BD)
53cdc686 JA	307	ret = bdev_size(td, f);
	308	else
	309	f->real_file_size = -1;
	310
	311	if (ret)
	312	return ret;
	313
	314	if (f->file_offset > f->real_file_size) {
2dc1bbeb	315	log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
53cdc686 JA	316	return 1;
	317	}
	318
53cdc686 JA	319	return 0;
	320	}
	321
e5b401d4 JA	322	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	323	{
	324	int ret = 0;
	325
2dc1bbeb	326	if (td->o.odirect)
b5af8293 JA	327	return 0;
b5af8293 JA	328
e5b401d4 JA	329	/*
	330	* FIXME: add blockdev flushing too
	331	*/
b5af8293	332	if (f->mmap)
e5b401d4	333	ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
467d1b6b	334	else if (f->filetype == FIO_TYPE_FILE)
b5af8293	335	ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
467d1b6b	336	else if (f->filetype == FIO_TYPE_BD)
b5af8293	337	ret = blockdev_invalidate_cache(f->fd);
467d1b6b	338	else if (f->filetype == FIO_TYPE_CHAR)
e5b401d4 JA	339	ret = 0;
	340
	341	if (ret < 0) {
e1161c32	342	td_verror(td, errno, "invalidate_cache");
e5b401d4 JA	343	return 1;
	344	}
	345
ad2da605	346	return ret;
e5b401d4 JA	347	}
e5b401d4 JA	348
b5af8293	349	void generic_close_file(struct thread_data fio_unused td, struct fio_file f)
53cdc686	350	{
b5af8293 JA	351	close(f->fd);
b5af8293 JA	352	f->fd = -1;
53cdc686 JA	353	}
53cdc686 JA	354
b5af8293	355	int generic_open_file(struct thread_data td, struct fio_file f)
53cdc686	356	{
53cdc686 JA	357	int flags = 0;
53cdc686 JA	358
2dc1bbeb	359	if (td->o.odirect)
2fd233b7	360	flags \|= OS_O_DIRECT;
2dc1bbeb	361	if (td->o.sync_io)
2fd233b7	362	flags \|= O_SYNC;
53cdc686	363
2fd233b7 JA	364	if (td_write(td) \|\| td_rw(td)) {
2fd233b7 JA	365	flags \|= O_RDWR;
53cdc686	366
af52b345	367	if (f->filetype == FIO_TYPE_FILE)
2fd233b7	368	flags \|= O_CREAT;
2fd233b7	369
b5af8293	370	f->fd = open(f->file_name, flags, 0600);
2fd233b7	371	} else {
af52b345	372	if (f->filetype == FIO_TYPE_CHAR)
2fd233b7 JA	373	flags \|= O_RDWR;
	374	else
	375	flags \|= O_RDONLY;
	376
b5af8293	377	f->fd = open(f->file_name, flags);
53cdc686 JA	378	}
	379
	380	if (f->fd == -1) {
e1161c32 JA	381	int __e = errno;
	382
	383	td_verror(td, __e, "open");
2dc1bbeb	384	if (__e == EINVAL && td->o.odirect)
9d80e114	385	log_err("fio: destination does not support O_DIRECT\n");
8ab53873	386	if (__e == EMFILE)
2dc1bbeb	387	log_err("fio: try reducing/setting openfiles (failed at %u of %u)\n", td->nr_open_files, td->o.nr_files);
53cdc686 JA	388	return 1;
	389	}
	390
b5af8293 JA	391	if (get_file_size(td, f))
	392	goto err;
	393
2dc1bbeb	394	if (td->o.invalidate_cache && file_invalidate_cache(td, f))
b5af8293 JA	395	goto err;
	396
	397	if (!td_random(td)) {
	398	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_SEQUENTIAL) < 0) {
	399	td_verror(td, errno, "fadvise");
	400	goto err;
	401	}
	402	} else {
	403	if (fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_RANDOM) < 0) {
	404	td_verror(td, errno, "fadvise");
	405	goto err;
	406	}
bdb4e2e9	407	}
53cdc686 JA	408
53cdc686 JA	409	return 0;
b5af8293 JA	410	err:
	411	close(f->fd);
	412	return 1;
	413	}
	414
21972cde JA	415	int open_files(struct thread_data *td)
	416	{
	417	struct fio_file *f;
af52b345 JA	418	unsigned int i;
af52b345 JA	419	int err = 0;
21972cde JA	420
21972cde JA	421	for_each_file(td, f, i) {
b5af8293	422	err = td_io_open_file(td, f);
21972cde JA	423	if (err)
21972cde JA	424	break;
b5af8293	425
2dc1bbeb	426	if (td->o.open_files == td->nr_open_files)
b5af8293	427	break;
21972cde JA	428	}
21972cde JA	429
7abf833d JA	430	if (!err)
	431	return 0;
	432
bdb4e2e9	433	for_each_file(td, f, i)
b5af8293	434	td_io_close_file(td, f);
7abf833d	435
21972cde JA	436	return err;
	437	}
	438
53cdc686 JA	439	int setup_files(struct thread_data *td)
	440	{
	441	struct fio_file *f;
af52b345 JA	442	unsigned int i;
af52b345 JA	443	int err;
53cdc686 JA	444
	445	/*
	446	* if ioengine defines a setup() method, it's responsible for
	447	* setting up everything in the td->files[] area.
	448	*/
	449	if (td->io_ops->setup)
	450	return td->io_ops->setup(td);
	451
	452	if (create_files(td))
	453	return 1;
	454
21972cde	455	err = open_files(td);
f1027063 JA	456	if (err)
	457	return err;
	458
0a7eb121 JA	459	/*
	460	* Recalculate the total file size now that files are set up.
	461	*/
2dc1bbeb	462	td->o.size = 0;
0a7eb121	463	for_each_file(td, f, i)
2dc1bbeb	464	td->o.size += f->file_size;
0a7eb121	465
2dc1bbeb	466	td->io_size = td->o.size;
53cdc686	467	if (td->io_size == 0) {
2dc1bbeb	468	log_err("%s: no io blocks\n", td->o.name);
e1161c32	469	td_verror(td, EINVAL, "total_file_size");
53cdc686 JA	470	return 1;
	471	}
	472
2dc1bbeb JA	473	if (!td->o.zone_size)
2dc1bbeb JA	474	td->o.zone_size = td->io_size;
53cdc686	475
2dc1bbeb	476	td->total_io_size = td->io_size * td->o.loops;
53cdc686	477
bdb4e2e9	478	for_each_file(td, f, i)
b5af8293	479	td_io_close_file(td, f);
21972cde JA	480
21972cde JA	481	return err;
53cdc686 JA	482	}
53cdc686 JA	483
68727076 JA	484	int init_random_map(struct thread_data *td)
	485	{
	486	int num_maps, blocks;
	487	struct fio_file *f;
	488	unsigned int i;
	489
	490	if (td->o.norandommap)
	491	return 0;
	492
	493	for_each_file(td, f, i) {
	494	blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
	495	num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
	496	f->file_map = malloc(num_maps * sizeof(long));
	497	if (!f->file_map) {
	498	log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
	499	return 1;
	500	}
	501	f->num_maps = num_maps;
	502	memset(f->file_map, 0, num_maps * sizeof(long));
	503	}
	504
	505	return 0;
	506	}
	507
53cdc686 JA	508	void close_files(struct thread_data *td)
53cdc686 JA	509	{
0ab8db89	510	struct fio_file *f;
af52b345	511	unsigned int i;
53cdc686	512
0ab8db89	513	for_each_file(td, f, i) {
1315a68a	514	if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
af52b345	515	f->filetype == FIO_TYPE_FILE) {
132ad46d	516	unlink(f->file_name);
1315a68a	517	free(f->file_name);
132ad46d JA	518	f->file_name = NULL;
132ad46d JA	519	}
bdb4e2e9	520
b5af8293	521	td_io_close_file(td, f);
b3dc7f07 JA	522
	523	if (f->file_map)
	524	free(f->file_map);
53cdc686	525	}
b4a6a59a	526
2dc1bbeb	527	td->o.filename = NULL;
b4a6a59a	528	td->files = NULL;
2dc1bbeb	529	td->o.nr_files = 0;
53cdc686	530	}
af52b345	531
e3bab463	532	static void get_file_type(struct fio_file *f)
af52b345 JA	533	{
	534	struct stat sb;
	535
	536	f->filetype = FIO_TYPE_FILE;
	537
e3bab463	538	if (!lstat(f->file_name, &sb)) {
96d32d51 JA	539	f->flags \|= FIO_FILE_EXISTS;
96d32d51 JA	540
af52b345 JA	541	if (S_ISBLK(sb.st_mode))
	542	f->filetype = FIO_TYPE_BD;
	543	else if (S_ISCHR(sb.st_mode))
	544	f->filetype = FIO_TYPE_CHAR;
96d32d51 JA	545	else {
	546	/*
	547	* might as well do this here, and save a stat later on
	548	*/
	549	f->real_file_size = sb.st_size;
	550	f->file_size = f->real_file_size;
	551	}
af52b345 JA	552	}
	553	}
	554
	555	void add_file(struct thread_data td, const char fname)
	556	{
7b4e4fe5	557	int cur_files = td->files_index;
af52b345 JA	558	struct fio_file *f;
	559
	560	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
	561
	562	f = &td->files[cur_files];
	563	memset(f, 0, sizeof(*f));
	564	f->fd = -1;
cae61953	565	f->file_name = strdup(fname);
af52b345	566
e3bab463	567	get_file_type(f);
af52b345	568
7b4e4fe5	569	td->files_index++;
1549441c JA	570	if (f->filetype == FIO_TYPE_FILE)
1549441c JA	571	td->nr_normal_files++;
af52b345	572	}
0ad920e7 JA	573
	574	void get_file(struct fio_file *f)
	575	{
	576	f->references++;
	577	}
	578
	579	void put_file(struct thread_data td, struct fio_file f)
	580	{
	581	if (!(f->flags & FIO_FILE_OPEN))
	582	return;
	583
	584	assert(f->references);
	585	if (--f->references)
	586	return;
	587
2dc1bbeb	588	if (should_fsync(td) && td->o.fsync_on_close)
ebb1415f JA	589	fsync(f->fd);
ebb1415f JA	590
0ad920e7 JA	591	if (td->io_ops->close_file)
	592	td->io_ops->close_file(td, f);
	593	td->nr_open_files--;
	594	f->flags &= ~FIO_FILE_OPEN;
	595	}
bbf6b540 JA	596
	597	static int recurse_dir(struct thread_data td, const char dirname)
	598	{
	599	struct dirent *dir;
	600	int ret = 0;
	601	DIR *D;
	602
	603	D = opendir(dirname);
	604	if (!D) {
	605	td_verror(td, errno, "opendir");
	606	return 1;
	607	}
	608
	609	while ((dir = readdir(D)) != NULL) {
	610	char full_path[PATH_MAX];
	611	struct stat sb;
	612
e85b2b83 JA	613	if (!strcmp(dir->d_name, ".") \|\| !strcmp(dir->d_name, ".."))
e85b2b83 JA	614	continue;
96d32d51	615
bbf6b540 JA	616	sprintf(full_path, "%s/%s", dirname, dir->d_name);
	617
	618	if (lstat(full_path, &sb) == -1) {
	619	if (errno != ENOENT) {
	620	td_verror(td, errno, "stat");
	621	return 1;
	622	}
	623	}
	624
	625	if (S_ISREG(sb.st_mode)) {
	626	add_file(td, full_path);
2dc1bbeb	627	td->o.nr_files++;
bbf6b540 JA	628	continue;
	629	}
	630
bbf6b540 JA	631	if ((ret = recurse_dir(td, full_path)) != 0)
	632	break;
	633	}
	634
	635	closedir(D);
	636	return ret;
	637	}
	638
	639	int add_dir_files(struct thread_data td, const char path)
	640	{
	641	return recurse_dir(td, path);
	642	}