[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 root_warn;

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;

	if (read_only) {
		log_err("fio: refusing extend of file due to read-only\n");
		return 0;
	}

	/*
	 * 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 - td->o.file_size_low) * (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()) {
			if (!root_warn) {
				log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
				root_warn = 1;
			}
			ret = 0;
		}
	} else if (f->filetype == FIO_TYPE_CHAR || f->filetype == FIO_TYPE_PIPE)
		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 is_std = 0;
	int flags = 0;

	if (!strcmp(f->file_name, "-")) {
		if (td_rw(td)) {
			log_err("fio: can't read/write to stdin/out\n");
			return 1;
		}
		is_std = 1;

		/*
		 * move output logging to stderr, if we are writing to stdout
		 */
		if (td_write(td))
			f_out = stderr;
	}

	if (td->o.odirect)
		flags |= OS_O_DIRECT;
	if (td->o.sync_io)
		flags |= O_SYNC;
	if (f->filetype != FIO_TYPE_FILE)
		flags |= O_NOATIME;

	if (td_write(td)) {
		assert(!read_only);

		flags |= O_RDWR;

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

		if (is_std)
			f->fd = dup(STDOUT_FILENO);
		else
			f->fd = open(f->file_name, flags, 0600);
	} else {
		if (f->filetype == FIO_TYPE_CHAR && !read_only)
			flags |= O_RDWR;
		else
			flags |= O_RDONLY;

		if (is_std)
			f->fd = dup(STDIN_FILENO);
		else
			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 &&
	    !(td->io_ops->flags & FIO_NOIO)) {
		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) {
		f->file_offset = td->o.start_offset;

		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) {
				if (f->file_offset > f->real_file_size)
					goto err_offset;
				f->io_size = f->real_file_size - f->file_offset;
			}
		} else if (f->real_file_size < td->o.file_size_low ||
			   f->real_file_size > td->o.file_size_high) {
			if (f->file_offset > td->o.file_size_low) 
				goto err_offset;
			/*
			 * 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 - f->file_offset;
			else
				f->io_size = get_rand_file_size(td) - f->file_offset;
		} else if (f->file_offset > f->real_file_size)
			goto err_offset;
		else
			f->io_size = f->real_file_size - f->file_offset;

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

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

	if (!td->o.size || td->o.size > total_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 file(s) / %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 + f->file_offset);
			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;

	/*
	 * iolog already set the total io size, if we read back
	 * stored entries.
	 */
	if (!td->o.read_iolog_file)
		td->total_io_size = td->o.size * td->o.loops;
	return 0;
err_offset:
	log_err("%s: you need to specify valid offset=\n", td->o.name);
	return 1;
}

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 (td->o.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;

	if (!strcmp(f->file_name, "-"))
		f->filetype = FIO_TYPE_PIPE;
	else
		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;
		else if (S_ISFIFO(sb.st_mode))
			f->filetype = FIO_TYPE_PIPE;
	}
}

int 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++;

	return cur_files;
}

void get_file(struct fio_file *f)
{
	assert(f->flags & FIO_FILE_OPEN);
	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);
	}
}

/*
 * Returns the index that matches the filename, or -1 if not there
 */
int get_fileno(struct thread_data *td, const char *fname)
{
	struct fio_file *f;
	unsigned int i;

	for_each_file(td, f, i)
		if (!strcmp(f->file_name, fname))
			return i;

	return -1;
}

/*
 * For log usage, where we add/open/close files automatically
 */
void free_release_files(struct thread_data *td)
{
	close_files(td);
	td->files_index = 0;
	td->nr_normal_files = 0;
}
Commit	Line	Data
	1	#include <unistd.h>
	2	#include <fcntl.h>
	3	#include <string.h>
	4	#include <assert.h>
	5	#include <dirent.h>
	6	#include <sys/stat.h>
	7	#include <sys/mman.h>
	8	#include <sys/types.h>
	9
	10	#include "fio.h"
	11
	12	static int root_warn;
	13
	14	static int extend_file(struct thread_data td, struct fio_file f)
	15	{
	16	int r, new_layout = 0, unlink_file = 0, flags;
	17	unsigned long long left;
	18	unsigned int bs;
	19	char *b;
	20
	21	if (read_only) {
	22	log_err("fio: refusing extend of file due to read-only\n");
	23	return 0;
	24	}
	25
	26	/*
	27	* check if we need to lay the file out complete again. fio
	28	* does that for operations involving reads, or for writes
	29	* where overwrite is set
	30	*/
	31	if (td_read(td) \|\| (td_write(td) && td->o.overwrite))
	32	new_layout = 1;
	33	if (td_write(td) && !td->o.overwrite)
	34	unlink_file = 1;
	35
	36	if ((unlink_file \|\| new_layout) && (f->flags & FIO_FILE_EXISTS)) {
	37	if (unlink(f->file_name) < 0) {
	38	td_verror(td, errno, "unlink");
	39	return 1;
	40	}
	41	}
	42
	43	flags = O_WRONLY \| O_CREAT;
	44	if (new_layout)
	45	flags \|= O_TRUNC;
	46
	47	f->fd = open(f->file_name, flags, 0644);
	48	if (f->fd < 0) {
	49	td_verror(td, errno, "open");
	50	return 1;
	51	}
	52
	53	if (ftruncate(f->fd, f->real_file_size) == -1) {
	54	td_verror(td, errno, "ftruncate");
	55	goto err;
	56	}
	57
	58	if (!new_layout)
	59	goto done;
	60
	61	if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
	62	td_verror(td, errno, "posix_fallocate");
	63	goto err;
	64	}
	65
	66	b = malloc(td->o.max_bs[DDIR_WRITE]);
	67	memset(b, 0, td->o.max_bs[DDIR_WRITE]);
	68
	69	left = f->real_file_size;
	70	while (left && !td->terminate) {
	71	bs = td->o.max_bs[DDIR_WRITE];
	72	if (bs > left)
	73	bs = left;
	74
	75	r = write(f->fd, b, bs);
	76
	77	if (r == (int) bs) {
	78	left -= bs;
	79	continue;
	80	} else {
	81	if (r < 0)
	82	td_verror(td, errno, "write");
	83	else
	84	td_verror(td, EIO, "write");
	85
	86	break;
	87	}
	88	}
	89
	90	if (td->terminate)
	91	unlink(f->file_name);
	92	else if (td->o.create_fsync)
	93	fsync(f->fd);
	94
	95	free(b);
	96	done:
	97	close(f->fd);
	98	f->fd = -1;
	99	return 0;
	100	err:
	101	close(f->fd);
	102	f->fd = -1;
	103	return 1;
	104	}
	105
	106	static unsigned long long get_rand_file_size(struct thread_data *td)
	107	{
	108	unsigned long long ret;
	109	long r;
	110
	111	r = os_random_long(&td->file_size_state);
	112	ret = td->o.file_size_low + (unsigned long long) ((double) (td->o.file_size_high - td->o.file_size_low) * (r / (RAND_MAX + 1.0)));
	113	ret -= (ret % td->o.rw_min_bs);
	114	return ret;
	115	}
	116
	117	static int file_size(struct thread_data td, struct fio_file f)
	118	{
	119	struct stat st;
	120
	121	if (fstat(f->fd, &st) == -1) {
	122	td_verror(td, errno, "fstat");
	123	return 1;
	124	}
	125
	126	f->real_file_size = st.st_size;
	127	return 0;
	128	}
	129
	130	static int bdev_size(struct thread_data td, struct fio_file f)
	131	{
	132	unsigned long long bytes;
	133	int r;
	134
	135	r = blockdev_size(f->fd, &bytes);
	136	if (r) {
	137	td_verror(td, r, "blockdev_size");
	138	return 1;
	139	}
	140
	141	f->real_file_size = bytes;
	142	return 0;
	143	}
	144
	145	static int get_file_size(struct thread_data td, struct fio_file f)
	146	{
	147	int ret = 0;
	148
	149	if (f->flags & FIO_SIZE_KNOWN)
	150	return 0;
	151
	152	if (f->filetype == FIO_TYPE_FILE)
	153	ret = file_size(td, f);
	154	else if (f->filetype == FIO_TYPE_BD)
	155	ret = bdev_size(td, f);
	156	else
	157	f->real_file_size = -1;
	158
	159	if (ret)
	160	return ret;
	161
	162	if (f->file_offset > f->real_file_size) {
	163	log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
	164	return 1;
	165	}
	166
	167	f->flags \|= FIO_SIZE_KNOWN;
	168	return 0;
	169	}
	170
	171	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	172	{
	173	int ret = 0;
	174
	175	if (td->o.odirect)
	176	return 0;
	177
	178	/*
	179	* FIXME: add blockdev flushing too
	180	*/
	181	if (f->mmap)
	182	ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
	183	else if (f->filetype == FIO_TYPE_FILE)
	184	ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
	185	else if (f->filetype == FIO_TYPE_BD) {
	186	ret = blockdev_invalidate_cache(f->fd);
	187	if (ret < 0 && errno == EACCES && geteuid()) {
	188	if (!root_warn) {
	189	log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
	190	root_warn = 1;
	191	}
	192	ret = 0;
	193	}
	194	} else if (f->filetype == FIO_TYPE_CHAR \|\| f->filetype == FIO_TYPE_PIPE)
	195	ret = 0;
	196
	197	if (ret < 0) {
	198	td_verror(td, errno, "invalidate_cache");
	199	return 1;
	200	}
	201
	202	return ret;
	203	}
	204
	205	void generic_close_file(struct thread_data fio_unused td, struct fio_file f)
	206	{
	207	close(f->fd);
	208	f->fd = -1;
	209	}
	210
	211	int generic_open_file(struct thread_data td, struct fio_file f)
	212	{
	213	int is_std = 0;
	214	int flags = 0;
	215
	216	if (!strcmp(f->file_name, "-")) {
	217	if (td_rw(td)) {
	218	log_err("fio: can't read/write to stdin/out\n");
	219	return 1;
	220	}
	221	is_std = 1;
	222
	223	/*
	224	* move output logging to stderr, if we are writing to stdout
	225	*/
	226	if (td_write(td))
	227	f_out = stderr;
	228	}
	229
	230	if (td->o.odirect)
	231	flags \|= OS_O_DIRECT;
	232	if (td->o.sync_io)
	233	flags \|= O_SYNC;
	234	if (f->filetype != FIO_TYPE_FILE)
	235	flags \|= O_NOATIME;
	236
	237	if (td_write(td)) {
	238	assert(!read_only);
	239
	240	flags \|= O_RDWR;
	241
	242	if (f->filetype == FIO_TYPE_FILE)
	243	flags \|= O_CREAT;
	244
	245	if (is_std)
	246	f->fd = dup(STDOUT_FILENO);
	247	else
	248	f->fd = open(f->file_name, flags, 0600);
	249	} else {
	250	if (f->filetype == FIO_TYPE_CHAR && !read_only)
	251	flags \|= O_RDWR;
	252	else
	253	flags \|= O_RDONLY;
	254
	255	if (is_std)
	256	f->fd = dup(STDIN_FILENO);
	257	else
	258	f->fd = open(f->file_name, flags);
	259	}
	260
	261	if (f->fd == -1) {
	262	char buf[FIO_VERROR_SIZE];
	263	int __e = errno;
	264
	265	snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
	266
	267	td_verror(td, __e, buf);
	268	}
	269
	270	if (get_file_size(td, f))
	271	goto err;
	272
	273	return 0;
	274	err:
	275	close(f->fd);
	276	return 1;
	277	}
	278
	279	int open_files(struct thread_data *td)
	280	{
	281	struct fio_file *f;
	282	unsigned int i;
	283	int err = 0;
	284
	285	for_each_file(td, f, i) {
	286	err = td_io_open_file(td, f);
	287	if (err) {
	288	if (td->error == EMFILE) {
	289	log_err("fio: limited open files to: %d\n", td->nr_open_files);
	290	td->o.open_files = td->nr_open_files;
	291	err = 0;
	292	clear_error(td);
	293	}
	294	break;
	295	}
	296
	297	if (td->o.open_files == td->nr_open_files)
	298	break;
	299	}
	300
	301	if (!err)
	302	return 0;
	303
	304	for_each_file(td, f, i)
	305	td_io_close_file(td, f);
	306
	307	return err;
	308	}
	309
	310	/*
	311	* open/close all files, so that ->real_file_size gets set
	312	*/
	313	static int get_file_sizes(struct thread_data *td)
	314	{
	315	struct fio_file *f;
	316	unsigned int i;
	317	int err = 0;
	318
	319	for_each_file(td, f, i) {
	320	if (td->io_ops->open_file(td, f)) {
	321	if (td->error != ENOENT) {
	322	log_err("%s\n", td->verror);
	323	err = 1;
	324	}
	325	clear_error(td);
	326	} else {
	327	if (td->io_ops->close_file)
	328	td->io_ops->close_file(td, f);
	329	}
	330
	331	if (f->real_file_size == -1ULL && td->o.size)
	332	f->real_file_size = td->o.size / td->o.nr_files;
	333	}
	334
	335	return err;
	336	}
	337
	338	/*
	339	* Open the files and setup files sizes, creating files if necessary.
	340	*/
	341	int setup_files(struct thread_data *td)
	342	{
	343	unsigned long long total_size, extend_size;
	344	struct fio_file *f;
	345	unsigned int i;
	346	int err = 0, need_extend;
	347
	348	/*
	349	* if ioengine defines a setup() method, it's responsible for
	350	* opening the files and setting f->real_file_size to indicate
	351	* the valid range for that file.
	352	*/
	353	if (td->io_ops->setup)
	354	err = td->io_ops->setup(td);
	355	else
	356	err = get_file_sizes(td);
	357
	358	if (err)
	359	return err;
	360
	361	/*
	362	* check sizes. if the files/devices do not exist and the size
	363	* isn't passed to fio, abort.
	364	*/
	365	total_size = 0;
	366	for_each_file(td, f, i) {
	367	if (f->real_file_size == -1ULL)
	368	total_size = -1ULL;
	369	else
	370	total_size += f->real_file_size;
	371	}
	372
	373	/*
	374	* device/file sizes are zero and no size given, punt
	375	*/
	376	if ((!total_size \|\| total_size == -1ULL) && !td->o.size &&
	377	!(td->io_ops->flags & FIO_NOIO)) {
	378	log_err("%s: you need to specify size=\n", td->o.name);
	379	td_verror(td, EINVAL, "total_file_size");
	380	return 1;
	381	}
	382
	383	/*
	384	* now file sizes are known, so we can set ->io_size. if size= is
	385	* not given, ->io_size is just equal to ->real_file_size. if size
	386	* is given, ->io_size is size / nr_files.
	387	*/
	388	extend_size = total_size = 0;
	389	need_extend = 0;
	390	for_each_file(td, f, i) {
	391	f->file_offset = td->o.start_offset;
	392
	393	if (!td->o.file_size_low) {
	394	/*
	395	* no file size range given, file size is equal to
	396	* total size divided by number of files. if that is
	397	* zero, set it to the real file size.
	398	*/
	399	f->io_size = td->o.size / td->o.nr_files;
	400	if (!f->io_size) {
	401	if (f->file_offset > f->real_file_size)
	402	goto err_offset;
	403	f->io_size = f->real_file_size - f->file_offset;
	404	}
	405	} else if (f->real_file_size < td->o.file_size_low \|\|
	406	f->real_file_size > td->o.file_size_high) {
	407	if (f->file_offset > td->o.file_size_low)
	408	goto err_offset;
	409	/*
	410	* file size given. if it's fixed, use that. if it's a
	411	* range, generate a random size in-between.
	412	*/
	413	if (td->o.file_size_low == td->o.file_size_high)
	414	f->io_size = td->o.file_size_low - f->file_offset;
	415	else
	416	f->io_size = get_rand_file_size(td) - f->file_offset;
	417	} else if (f->file_offset > f->real_file_size)
	418	goto err_offset;
	419	else
	420	f->io_size = f->real_file_size - f->file_offset;
	421
	422	if (f->io_size == -1ULL)
	423	total_size = -1ULL;
	424	else
	425	total_size += f->io_size;
	426
	427	if (f->filetype == FIO_TYPE_FILE &&
	428	(f->io_size + f->file_offset) > f->real_file_size &&
	429	!(td->io_ops->flags & FIO_DISKLESSIO)) {
	430	need_extend++;
	431	extend_size += (f->io_size + f->file_offset);
	432	f->flags \|= FIO_FILE_EXTEND;
	433	}
	434	}
	435
	436	if (!td->o.size \|\| td->o.size > total_size)
	437	td->o.size = total_size;
	438
	439	/*
	440	* See if we need to extend some files
	441	*/
	442	if (need_extend) {
	443	temp_stall_ts = 1;
	444	log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
	445	td->o.name, need_extend, extend_size >> 20);
	446
	447	for_each_file(td, f, i) {
	448	if (!(f->flags & FIO_FILE_EXTEND))
	449	continue;
	450
	451	assert(f->filetype == FIO_TYPE_FILE);
	452	f->flags &= ~FIO_FILE_EXTEND;
	453	f->real_file_size = (f->io_size + f->file_offset);
	454	err = extend_file(td, f);
	455	if (err)
	456	break;
	457	}
	458	temp_stall_ts = 0;
	459	}
	460
	461	if (err)
	462	return err;
	463
	464	if (!td->o.zone_size)
	465	td->o.zone_size = td->o.size;
	466
	467	/*
	468	* iolog already set the total io size, if we read back
	469	* stored entries.
	470	*/
	471	if (!td->o.read_iolog_file)
	472	td->total_io_size = td->o.size * td->o.loops;
	473	return 0;
	474	err_offset:
	475	log_err("%s: you need to specify valid offset=\n", td->o.name);
	476	return 1;
	477	}
	478
	479	int init_random_map(struct thread_data *td)
	480	{
	481	int num_maps, blocks;
	482	struct fio_file *f;
	483	unsigned int i;
	484
	485	if (td->o.norandommap)
	486	return 0;
	487
	488	for_each_file(td, f, i) {
	489	blocks = (f->real_file_size + td->o.rw_min_bs - 1) / td->o.rw_min_bs;
	490	num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
	491	f->file_map = malloc(num_maps * sizeof(long));
	492	if (!f->file_map) {
	493	log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
	494	return 1;
	495	}
	496	f->num_maps = num_maps;
	497	memset(f->file_map, 0, num_maps * sizeof(long));
	498	}
	499
	500	return 0;
	501	}
	502
	503	void close_files(struct thread_data *td)
	504	{
	505	struct fio_file *f;
	506	unsigned int i;
	507
	508	for_each_file(td, f, i) {
	509	if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
	510	unlink(f->file_name);
	511
	512	td_io_close_file(td, f);
	513
	514	free(f->file_name);
	515	f->file_name = NULL;
	516
	517	if (f->file_map) {
	518	free(f->file_map);
	519	f->file_map = NULL;
	520	}
	521	}
	522
	523	td->o.filename = NULL;
	524	free(td->files);
	525	td->files = NULL;
	526	td->o.nr_files = 0;
	527	}
	528
	529	static void get_file_type(struct fio_file *f)
	530	{
	531	struct stat sb;
	532
	533	if (!strcmp(f->file_name, "-"))
	534	f->filetype = FIO_TYPE_PIPE;
	535	else
	536	f->filetype = FIO_TYPE_FILE;
	537
	538	if (!lstat(f->file_name, &sb)) {
	539	if (S_ISBLK(sb.st_mode))
	540	f->filetype = FIO_TYPE_BD;
	541	else if (S_ISCHR(sb.st_mode))
	542	f->filetype = FIO_TYPE_CHAR;
	543	else if (S_ISFIFO(sb.st_mode))
	544	f->filetype = FIO_TYPE_PIPE;
	545	}
	546	}
	547
	548	int add_file(struct thread_data td, const char fname)
	549	{
	550	int cur_files = td->files_index;
	551	char file_name[PATH_MAX];
	552	struct fio_file *f;
	553	int len = 0;
	554
	555	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
	556
	557	f = &td->files[cur_files];
	558	memset(f, 0, sizeof(*f));
	559	f->fd = -1;
	560
	561	/*
	562	* init function, io engine may not be loaded yet
	563	*/
	564	if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
	565	f->real_file_size = -1ULL;
	566
	567	if (td->o.directory)
	568	len = sprintf(file_name, "%s/", td->o.directory);
	569
	570	sprintf(file_name + len, "%s", fname);
	571	f->file_name = strdup(file_name);
	572
	573	get_file_type(f);
	574
	575	td->files_index++;
	576	if (f->filetype == FIO_TYPE_FILE)
	577	td->nr_normal_files++;
	578
	579	return cur_files;
	580	}
	581
	582	void get_file(struct fio_file *f)
	583	{
	584	assert(f->flags & FIO_FILE_OPEN);
	585	f->references++;
	586	}
	587
	588	void put_file(struct thread_data td, struct fio_file f)
	589	{
	590	if (!(f->flags & FIO_FILE_OPEN))
	591	return;
	592
	593	assert(f->references);
	594	if (--f->references)
	595	return;
	596
	597	if (should_fsync(td) && td->o.fsync_on_close)
	598	fsync(f->fd);
	599
	600	if (td->io_ops->close_file)
	601	td->io_ops->close_file(td, f);
	602
	603	td->nr_open_files--;
	604	f->flags &= ~FIO_FILE_OPEN;
	605	}
	606
	607	static int recurse_dir(struct thread_data td, const char dirname)
	608	{
	609	struct dirent *dir;
	610	int ret = 0;
	611	DIR *D;
	612
	613	D = opendir(dirname);
	614	if (!D) {
	615	char buf[FIO_VERROR_SIZE];
	616
	617	snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
	618	td_verror(td, errno, buf);
	619	return 1;
	620	}
	621
	622	while ((dir = readdir(D)) != NULL) {
	623	char full_path[PATH_MAX];
	624	struct stat sb;
	625
	626	if (!strcmp(dir->d_name, ".") \|\| !strcmp(dir->d_name, ".."))
	627	continue;
	628
	629	sprintf(full_path, "%s/%s", dirname, dir->d_name);
	630
	631	if (lstat(full_path, &sb) == -1) {
	632	if (errno != ENOENT) {
	633	td_verror(td, errno, "stat");
	634	return 1;
	635	}
	636	}
	637
	638	if (S_ISREG(sb.st_mode)) {
	639	add_file(td, full_path);
	640	td->o.nr_files++;
	641	continue;
	642	}
	643	if (!S_ISDIR(sb.st_mode))
	644	continue;
	645
	646	if ((ret = recurse_dir(td, full_path)) != 0)
	647	break;
	648	}
	649
	650	closedir(D);
	651	return ret;
	652	}
	653
	654	int add_dir_files(struct thread_data td, const char path)
	655	{
	656	int ret = recurse_dir(td, path);
	657
	658	if (!ret)
	659	log_info("fio: opendir added %d files\n", td->o.nr_files);
	660
	661	return ret;
	662	}
	663
	664	void dup_files(struct thread_data td, struct thread_data org)
	665	{
	666	struct fio_file *f;
	667	unsigned int i;
	668	size_t bytes;
	669
	670	if (!org->files)
	671	return;
	672
	673	bytes = org->files_index * sizeof(*f);
	674	td->files = malloc(bytes);
	675	memcpy(td->files, org->files, bytes);
	676
	677	for_each_file(td, f, i) {
	678	if (f->file_name)
	679	f->file_name = strdup(f->file_name);
	680	}
	681	}
	682
	683	/*
	684	* Returns the index that matches the filename, or -1 if not there
	685	*/
	686	int get_fileno(struct thread_data td, const char fname)
	687	{
	688	struct fio_file *f;
	689	unsigned int i;
	690
	691	for_each_file(td, f, i)
	692	if (!strcmp(f->file_name, fname))
	693	return i;
	694
	695	return -1;
	696	}
	697
	698	/*
	699	* For log usage, where we add/open/close files automatically
	700	*/
	701	void free_release_files(struct thread_data *td)
	702	{
	703	close_files(td);
	704	td->files_index = 0;
	705	td->nr_normal_files = 0;
	706	}