[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 (!new_layout)
		goto done;

	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;
	}

	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;

open_again:
	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;

		if (errno == EPERM && (flags & O_NOATIME)) {
			flags &= ~O_NOATIME;
			goto open_again;
		}

		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) && !td->o.fill_device) {
		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 || f->io_size > f->real_file_size) &&
			     f->real_file_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)
{
	unsigned long long blocks, num_maps;
	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) / (unsigned long long) td->o.rw_min_bs;
		num_maps = (blocks + BLOCKS_PER_MAP-1)/ (unsigned long long) 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
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
7172cfe8 JA	12	static int root_warn;
7172cfe8 JA	13
7bb48f84	14	static int extend_file(struct thread_data td, struct fio_file f)
25205e97	15	{
ea443657	16	int r, new_layout = 0, unlink_file = 0, flags;
25205e97 JA	17	unsigned long long left;
	18	unsigned int bs;
	19	char *b;
b2a15192	20
4241ea8f JA	21	if (read_only) {
	22	log_err("fio: refusing extend of file due to read-only\n");
	23	return 0;
	24	}
	25
507a702f JA	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;
ea443657 JA	33	if (td_write(td) && !td->o.overwrite)
ea443657 JA	34	unlink_file = 1;
507a702f	35
ea443657	36	if ((unlink_file \|\| new_layout) && (f->flags & FIO_FILE_EXISTS)) {
7bb48f84 JA	37	if (unlink(f->file_name) < 0) {
	38	td_verror(td, errno, "unlink");
	39	return 1;
	40	}
	41	}
	42
507a702f JA	43	flags = O_WRONLY \| O_CREAT;
	44	if (new_layout)
	45	flags \|= O_TRUNC;
	46
	47	f->fd = open(f->file_name, flags, 0644);
53cdc686	48	if (f->fd < 0) {
e1161c32	49	td_verror(td, errno, "open");
53cdc686 JA	50	return 1;
	51	}
	52
fc74ac1d SL	53	if (!new_layout)
	54	goto done;
	55
7bb48f84	56	if (ftruncate(f->fd, f->real_file_size) == -1) {
e1161c32	57	td_verror(td, errno, "ftruncate");
53cdc686 JA	58	goto err;
	59	}
	60
7bb48f84	61	if (posix_fallocate(f->fd, 0, f->real_file_size) < 0) {
e1161c32	62	td_verror(td, errno, "posix_fallocate");
40f8298c JA	63	goto err;
	64	}
	65
2dc1bbeb JA	66	b = malloc(td->o.max_bs[DDIR_WRITE]);
2dc1bbeb JA	67	memset(b, 0, td->o.max_bs[DDIR_WRITE]);
53cdc686	68
7bb48f84	69	left = f->real_file_size;
53cdc686	70	while (left && !td->terminate) {
2dc1bbeb	71	bs = td->o.max_bs[DDIR_WRITE];
53cdc686 JA	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)
e1161c32	82	td_verror(td, errno, "write");
53cdc686	83	else
e1161c32	84	td_verror(td, EIO, "write");
53cdc686 JA	85
	86	break;
	87	}
	88	}
	89
	90	if (td->terminate)
	91	unlink(f->file_name);
2dc1bbeb	92	else if (td->o.create_fsync)
53cdc686 JA	93	fsync(f->fd);
	94
	95	free(b);
507a702f	96	done:
53cdc686 JA	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
7bb48f84	106	static unsigned long long get_rand_file_size(struct thread_data *td)
9c60ce64	107	{
9c60ce64 JA	108	unsigned long long ret;
	109	long r;
	110
9c60ce64	111	r = os_random_long(&td->file_size_state);
d11a531f	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)));
2dc1bbeb	113	ret -= (ret % td->o.rw_min_bs);
9c60ce64 JA	114	return ret;
	115	}
	116
53cdc686 JA	117	static int file_size(struct thread_data td, struct fio_file f)
	118	{
	119	struct stat st;
	120
7bb48f84 JA	121	if (fstat(f->fd, &st) == -1) {
	122	td_verror(td, errno, "fstat");
	123	return 1;
	124	}
53cdc686	125
7bb48f84	126	f->real_file_size = st.st_size;
53cdc686 JA	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) {
e1161c32	137	td_verror(td, r, "blockdev_size");
53cdc686 JA	138	return 1;
	139	}
	140
	141	f->real_file_size = bytes;
53cdc686 JA	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
409b3417 JA	149	if (f->flags & FIO_SIZE_KNOWN)
	150	return 0;
	151
7bb48f84 JA	152	if (f->filetype == FIO_TYPE_FILE)
	153	ret = file_size(td, f);
	154	else if (f->filetype == FIO_TYPE_BD)
53cdc686 JA	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) {
2dc1bbeb	163	log_err("%s: offset extends end (%Lu > %Lu)\n", td->o.name, f->file_offset, f->real_file_size);
53cdc686 JA	164	return 1;
	165	}
	166
409b3417	167	f->flags \|= FIO_SIZE_KNOWN;
53cdc686 JA	168	return 0;
	169	}
	170
e5b401d4 JA	171	int file_invalidate_cache(struct thread_data td, struct fio_file f)
	172	{
	173	int ret = 0;
	174
2dc1bbeb	175	if (td->o.odirect)
b5af8293 JA	176	return 0;
b5af8293 JA	177
e5b401d4 JA	178	/*
	179	* FIXME: add blockdev flushing too
	180	*/
b5af8293	181	if (f->mmap)
7bb48f84	182	ret = madvise(f->mmap, f->io_size, MADV_DONTNEED);
467d1b6b	183	else if (f->filetype == FIO_TYPE_FILE)
7bb48f84	184	ret = fadvise(f->fd, f->file_offset, f->io_size, POSIX_FADV_DONTNEED);
7e0e25c9	185	else if (f->filetype == FIO_TYPE_BD) {
b5af8293	186	ret = blockdev_invalidate_cache(f->fd);
7e0e25c9	187	if (ret < 0 && errno == EACCES && geteuid()) {
7172cfe8 JA	188	if (!root_warn) {
	189	log_err("fio: only root may flush block devices. Cache flush bypassed!\n");
	190	root_warn = 1;
	191	}
7e0e25c9 JA	192	ret = 0;
7e0e25c9 JA	193	}
b5605e9d	194	} else if (f->filetype == FIO_TYPE_CHAR \|\| f->filetype == FIO_TYPE_PIPE)
e5b401d4 JA	195	ret = 0;
	196
	197	if (ret < 0) {
e1161c32	198	td_verror(td, errno, "invalidate_cache");
e5b401d4 JA	199	return 1;
	200	}
	201
ad2da605	202	return ret;
e5b401d4 JA	203	}
e5b401d4 JA	204
b5af8293	205	void generic_close_file(struct thread_data fio_unused td, struct fio_file f)
53cdc686	206	{
b5af8293 JA	207	close(f->fd);
b5af8293 JA	208	f->fd = -1;
53cdc686 JA	209	}
53cdc686 JA	210
b5af8293	211	int generic_open_file(struct thread_data td, struct fio_file f)
53cdc686	212	{
66159828	213	int is_std = 0;
53cdc686 JA	214	int flags = 0;
53cdc686 JA	215
66159828 JA	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;
ce98fa66 JA	222
	223	/*
	224	* move output logging to stderr, if we are writing to stdout
	225	*/
	226	if (td_write(td))
	227	f_out = stderr;
66159828 JA	228	}
66159828 JA	229
2dc1bbeb	230	if (td->o.odirect)
2fd233b7	231	flags \|= OS_O_DIRECT;
2dc1bbeb	232	if (td->o.sync_io)
2fd233b7	233	flags \|= O_SYNC;
ad92396c JA	234	if (f->filetype != FIO_TYPE_FILE)
ad92396c JA	235	flags \|= O_NOATIME;
53cdc686	236
056f3459	237	open_again:
660a1cb5	238	if (td_write(td)) {
4241ea8f JA	239	assert(!read_only);
4241ea8f JA	240
2fd233b7	241	flags \|= O_RDWR;
53cdc686	242
af52b345	243	if (f->filetype == FIO_TYPE_FILE)
2fd233b7	244	flags \|= O_CREAT;
2fd233b7	245
66159828 JA	246	if (is_std)
	247	f->fd = dup(STDOUT_FILENO);
	248	else
	249	f->fd = open(f->file_name, flags, 0600);
2fd233b7	250	} else {
4241ea8f	251	if (f->filetype == FIO_TYPE_CHAR && !read_only)
2fd233b7 JA	252	flags \|= O_RDWR;
	253	else
	254	flags \|= O_RDONLY;
	255
66159828 JA	256	if (is_std)
	257	f->fd = dup(STDIN_FILENO);
	258	else
	259	f->fd = open(f->file_name, flags);
53cdc686 JA	260	}
	261
	262	if (f->fd == -1) {
e4e33258	263	char buf[FIO_VERROR_SIZE];
e1161c32 JA	264	int __e = errno;
e1161c32 JA	265
056f3459 AC	266	if (errno == EPERM && (flags & O_NOATIME)) {
	267	flags &= ~O_NOATIME;
	268	goto open_again;
	269	}
	270
e4e33258 JA	271	snprintf(buf, sizeof(buf) - 1, "open(%s)", f->file_name);
	272
	273	td_verror(td, __e, buf);
53cdc686 JA	274	}
53cdc686 JA	275
b5af8293 JA	276	if (get_file_size(td, f))
	277	goto err;
	278
53cdc686	279	return 0;
b5af8293 JA	280	err:
	281	close(f->fd);
	282	return 1;
	283	}
	284
21972cde JA	285	int open_files(struct thread_data *td)
	286	{
	287	struct fio_file *f;
af52b345 JA	288	unsigned int i;
af52b345 JA	289	int err = 0;
21972cde JA	290
21972cde JA	291	for_each_file(td, f, i) {
b5af8293	292	err = td_io_open_file(td, f);
9bf27b45 JA	293	if (err) {
	294	if (td->error == EMFILE) {
	295	log_err("fio: limited open files to: %d\n", td->nr_open_files);
	296	td->o.open_files = td->nr_open_files;
	297	err = 0;
	298	clear_error(td);
	299	}
21972cde	300	break;
9bf27b45	301	}
b5af8293	302
2dc1bbeb	303	if (td->o.open_files == td->nr_open_files)
b5af8293	304	break;
21972cde JA	305	}
21972cde JA	306
7abf833d JA	307	if (!err)
	308	return 0;
	309
bdb4e2e9	310	for_each_file(td, f, i)
b5af8293	311	td_io_close_file(td, f);
7abf833d	312
21972cde JA	313	return err;
	314	}
	315
7bb48f84 JA	316	/*
	317	* open/close all files, so that ->real_file_size gets set
	318	*/
bab3fd58	319	static int get_file_sizes(struct thread_data *td)
7bb48f84 JA	320	{
	321	struct fio_file *f;
	322	unsigned int i;
bab3fd58	323	int err = 0;
7bb48f84 JA	324
7bb48f84 JA	325	for_each_file(td, f, i) {
bab3fd58	326	if (td->io_ops->open_file(td, f)) {
40b44f4a JA	327	if (td->error != ENOENT) {
	328	log_err("%s\n", td->verror);
	329	err = 1;
	330	}
541d66d7	331	clear_error(td);
07eb79df JA	332	} else {
	333	if (td->io_ops->close_file)
	334	td->io_ops->close_file(td, f);
	335	}
409b3417 JA	336
	337	if (f->real_file_size == -1ULL && td->o.size)
	338	f->real_file_size = td->o.size / td->o.nr_files;
7bb48f84	339	}
bab3fd58 JA	340
bab3fd58 JA	341	return err;
7bb48f84 JA	342	}
	343
	344	/*
	345	* Open the files and setup files sizes, creating files if necessary.
	346	*/
53cdc686 JA	347	int setup_files(struct thread_data *td)
53cdc686 JA	348	{
7bb48f84	349	unsigned long long total_size, extend_size;
53cdc686	350	struct fio_file *f;
af52b345	351	unsigned int i;
000b0803	352	int err = 0, need_extend;
53cdc686 JA	353
	354	/*
	355	* if ioengine defines a setup() method, it's responsible for
7bb48f84 JA	356	* opening the files and setting f->real_file_size to indicate
7bb48f84 JA	357	* the valid range for that file.
53cdc686 JA	358	*/
53cdc686 JA	359	if (td->io_ops->setup)
7bb48f84 JA	360	err = td->io_ops->setup(td);
7bb48f84 JA	361	else
bab3fd58	362	err = get_file_sizes(td);
53cdc686	363
f1027063 JA	364	if (err)
	365	return err;
	366
0a7eb121	367	/*
7bb48f84 JA	368	* check sizes. if the files/devices do not exist and the size
7bb48f84 JA	369	* isn't passed to fio, abort.
0a7eb121	370	*/
7bb48f84 JA	371	total_size = 0;
	372	for_each_file(td, f, i) {
	373	if (f->real_file_size == -1ULL)
	374	total_size = -1ULL;
	375	else
	376	total_size += f->real_file_size;
	377	}
0a7eb121	378
7bb48f84 JA	379	/*
	380	* device/file sizes are zero and no size given, punt
	381	*/
1f809d15	382	if ((!total_size \|\| total_size == -1ULL) && !td->o.size &&
aa31f1f1	383	!(td->io_ops->flags & FIO_NOIO) && !td->o.fill_device) {
7bb48f84	384	log_err("%s: you need to specify size=\n", td->o.name);
e1161c32	385	td_verror(td, EINVAL, "total_file_size");
53cdc686 JA	386	return 1;
	387	}
	388
7bb48f84 JA	389	/*
	390	* now file sizes are known, so we can set ->io_size. if size= is
	391	* not given, ->io_size is just equal to ->real_file_size. if size
	392	* is given, ->io_size is size / nr_files.
	393	*/
	394	extend_size = total_size = 0;
	395	need_extend = 0;
	396	for_each_file(td, f, i) {
bcdedd0a YHJT	397	f->file_offset = td->o.start_offset;
bcdedd0a YHJT	398
7bb48f84 JA	399	if (!td->o.file_size_low) {
	400	/*
	401	* no file size range given, file size is equal to
	402	* total size divided by number of files. if that is
	403	* zero, set it to the real file size.
	404	*/
	405	f->io_size = td->o.size / td->o.nr_files;
8f9cc4a9 GP	406	if ((!f->io_size \|\| f->io_size > f->real_file_size) &&
8f9cc4a9 GP	407	f->real_file_size) {
bcdedd0a YHJT	408	if (f->file_offset > f->real_file_size)
	409	goto err_offset;
	410	f->io_size = f->real_file_size - f->file_offset;
	411	}
7bb48f84 JA	412	} else if (f->real_file_size < td->o.file_size_low \|\|
7bb48f84 JA	413	f->real_file_size > td->o.file_size_high) {
bcdedd0a YHJT	414	if (f->file_offset > td->o.file_size_low)
bcdedd0a YHJT	415	goto err_offset;
7bb48f84 JA	416	/*
	417	* file size given. if it's fixed, use that. if it's a
	418	* range, generate a random size in-between.
	419	*/
	420	if (td->o.file_size_low == td->o.file_size_high)
bcdedd0a	421	f->io_size = td->o.file_size_low - f->file_offset;
7bb48f84	422	else
bcdedd0a YHJT	423	f->io_size = get_rand_file_size(td) - f->file_offset;
	424	} else if (f->file_offset > f->real_file_size)
	425	goto err_offset;
	426	else
	427	f->io_size = f->real_file_size - f->file_offset;
53cdc686	428
7bb48f84 JA	429	if (f->io_size == -1ULL)
	430	total_size = -1ULL;
	431	else
	432	total_size += f->io_size;
	433
	434	if (f->filetype == FIO_TYPE_FILE &&
bcdedd0a	435	(f->io_size + f->file_offset) > f->real_file_size &&
7bb48f84 JA	436	!(td->io_ops->flags & FIO_DISKLESSIO)) {
7bb48f84 JA	437	need_extend++;
bcdedd0a	438	extend_size += (f->io_size + f->file_offset);
7bb48f84	439	f->flags \|= FIO_FILE_EXTEND;
bcdedd0a	440	}
7bb48f84	441	}
53cdc686	442
2298290e	443	if (!td->o.size \|\| td->o.size > total_size)
7bb48f84	444	td->o.size = total_size;
21972cde	445
7bb48f84 JA	446	/*
	447	* See if we need to extend some files
	448	*/
	449	if (need_extend) {
	450	temp_stall_ts = 1;
f627d8ae	451	log_info("%s: Laying out IO file(s) (%u file(s) / %LuMiB)\n",
7bb48f84 JA	452	td->o.name, need_extend, extend_size >> 20);
	453
	454	for_each_file(td, f, i) {
	455	if (!(f->flags & FIO_FILE_EXTEND))
	456	continue;
	457
409b3417	458	assert(f->filetype == FIO_TYPE_FILE);
7bb48f84	459	f->flags &= ~FIO_FILE_EXTEND;
bcdedd0a	460	f->real_file_size = (f->io_size + f->file_offset);
7bb48f84 JA	461	err = extend_file(td, f);
	462	if (err)
	463	break;
	464	}
	465	temp_stall_ts = 0;
	466	}
	467
	468	if (err)
	469	return err;
	470
	471	if (!td->o.zone_size)
	472	td->o.zone_size = td->o.size;
	473
ea966f81 JA	474	/*
	475	* iolog already set the total io size, if we read back
	476	* stored entries.
	477	*/
	478	if (!td->o.read_iolog_file)
	479	td->total_io_size = td->o.size * td->o.loops;
7bb48f84	480	return 0;
bcdedd0a YHJT	481	err_offset:
	482	log_err("%s: you need to specify valid offset=\n", td->o.name);
	483	return 1;
53cdc686 JA	484	}
53cdc686 JA	485
68727076 JA	486	int init_random_map(struct thread_data *td)
68727076 JA	487	{
509eab12	488	unsigned long long blocks, num_maps;
68727076 JA	489	struct fio_file *f;
	490	unsigned int i;
	491
	492	if (td->o.norandommap)
	493	return 0;
	494
	495	for_each_file(td, f, i) {
509eab12 JA	496	blocks = (f->real_file_size + td->o.rw_min_bs - 1) / (unsigned long long) td->o.rw_min_bs;
509eab12 JA	497	num_maps = (blocks + BLOCKS_PER_MAP-1)/ (unsigned long long) BLOCKS_PER_MAP;
68727076 JA	498	f->file_map = malloc(num_maps * sizeof(long));
	499	if (!f->file_map) {
	500	log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
	501	return 1;
	502	}
	503	f->num_maps = num_maps;
	504	memset(f->file_map, 0, num_maps * sizeof(long));
	505	}
	506
	507	return 0;
	508	}
	509
53cdc686 JA	510	void close_files(struct thread_data *td)
53cdc686 JA	511	{
0ab8db89	512	struct fio_file *f;
af52b345	513	unsigned int i;
53cdc686	514
0ab8db89	515	for_each_file(td, f, i) {
a9b7b305	516	if (td->o.unlink && f->filetype == FIO_TYPE_FILE)
132ad46d	517	unlink(f->file_name);
bdb4e2e9	518
b5af8293	519	td_io_close_file(td, f);
b3dc7f07	520
fa1da865 JA	521	free(f->file_name);
	522	f->file_name = NULL;
	523
c343981b	524	if (f->file_map) {
b3dc7f07	525	free(f->file_map);
c343981b JA	526	f->file_map = NULL;
c343981b JA	527	}
53cdc686	528	}
b4a6a59a	529
2dc1bbeb	530	td->o.filename = NULL;
cade3ef4	531	free(td->files);
b4a6a59a	532	td->files = NULL;
2dc1bbeb	533	td->o.nr_files = 0;
53cdc686	534	}
af52b345	535
e3bab463	536	static void get_file_type(struct fio_file *f)
af52b345 JA	537	{
	538	struct stat sb;
	539
66159828 JA	540	if (!strcmp(f->file_name, "-"))
	541	f->filetype = FIO_TYPE_PIPE;
	542	else
	543	f->filetype = FIO_TYPE_FILE;
af52b345	544
e3bab463	545	if (!lstat(f->file_name, &sb)) {
af52b345 JA	546	if (S_ISBLK(sb.st_mode))
	547	f->filetype = FIO_TYPE_BD;
	548	else if (S_ISCHR(sb.st_mode))
	549	f->filetype = FIO_TYPE_CHAR;
b5605e9d JA	550	else if (S_ISFIFO(sb.st_mode))
b5605e9d JA	551	f->filetype = FIO_TYPE_PIPE;
af52b345 JA	552	}
	553	}
	554
f29b25a3	555	int add_file(struct thread_data td, const char fname)
af52b345	556	{
7b4e4fe5	557	int cur_files = td->files_index;
bd0ee748	558	char file_name[PATH_MAX];
af52b345	559	struct fio_file *f;
bd0ee748	560	int len = 0;
af52b345 JA	561
	562	td->files = realloc(td->files, (cur_files + 1) * sizeof(*f));
	563
	564	f = &td->files[cur_files];
	565	memset(f, 0, sizeof(*f));
	566	f->fd = -1;
bd0ee748	567
07eb79df JA	568	/*
	569	* init function, io engine may not be loaded yet
	570	*/
	571	if (td->io_ops && (td->io_ops->flags & FIO_DISKLESSIO))
	572	f->real_file_size = -1ULL;
	573
bd0ee748 JA	574	if (td->o.directory)
	575	len = sprintf(file_name, "%s/", td->o.directory);
	576
	577	sprintf(file_name + len, "%s", fname);
	578	f->file_name = strdup(file_name);
af52b345	579
e3bab463	580	get_file_type(f);
af52b345	581
7b4e4fe5	582	td->files_index++;
1549441c JA	583	if (f->filetype == FIO_TYPE_FILE)
1549441c JA	584	td->nr_normal_files++;
f29b25a3 JA	585
f29b25a3 JA	586	return cur_files;
af52b345	587	}
0ad920e7 JA	588
	589	void get_file(struct fio_file *f)
	590	{
97af62ce	591	assert(f->flags & FIO_FILE_OPEN);
0ad920e7 JA	592	f->references++;
	593	}
	594
	595	void put_file(struct thread_data td, struct fio_file f)
	596	{
	597	if (!(f->flags & FIO_FILE_OPEN))
	598	return;
	599
	600	assert(f->references);
	601	if (--f->references)
	602	return;
	603
d424d4dd	604	if (should_fsync(td) && td->o.fsync_on_close)
ebb1415f JA	605	fsync(f->fd);
ebb1415f JA	606
0ad920e7 JA	607	if (td->io_ops->close_file)
0ad920e7 JA	608	td->io_ops->close_file(td, f);
1020a139	609
0ad920e7 JA	610	td->nr_open_files--;
	611	f->flags &= ~FIO_FILE_OPEN;
	612	}
bbf6b540 JA	613
	614	static int recurse_dir(struct thread_data td, const char dirname)
	615	{
	616	struct dirent *dir;
	617	int ret = 0;
	618	DIR *D;
	619
	620	D = opendir(dirname);
	621	if (!D) {
0ddb270c JA	622	char buf[FIO_VERROR_SIZE];
	623
	624	snprintf(buf, FIO_VERROR_SIZE - 1, "opendir(%s)", dirname);
	625	td_verror(td, errno, buf);
bbf6b540 JA	626	return 1;
	627	}
	628
	629	while ((dir = readdir(D)) != NULL) {
	630	char full_path[PATH_MAX];
	631	struct stat sb;
	632
e85b2b83 JA	633	if (!strcmp(dir->d_name, ".") \|\| !strcmp(dir->d_name, ".."))
e85b2b83 JA	634	continue;
96d32d51	635
bbf6b540 JA	636	sprintf(full_path, "%s/%s", dirname, dir->d_name);
	637
	638	if (lstat(full_path, &sb) == -1) {
	639	if (errno != ENOENT) {
	640	td_verror(td, errno, "stat");
	641	return 1;
	642	}
	643	}
	644
	645	if (S_ISREG(sb.st_mode)) {
	646	add_file(td, full_path);
2dc1bbeb	647	td->o.nr_files++;
bbf6b540 JA	648	continue;
bbf6b540 JA	649	}
0ddb270c JA	650	if (!S_ISDIR(sb.st_mode))
0ddb270c JA	651	continue;
bbf6b540	652
bbf6b540 JA	653	if ((ret = recurse_dir(td, full_path)) != 0)
	654	break;
	655	}
	656
	657	closedir(D);
	658	return ret;
	659	}
	660
	661	int add_dir_files(struct thread_data td, const char path)
	662	{
0ddb270c JA	663	int ret = recurse_dir(td, path);
	664
	665	if (!ret)
	666	log_info("fio: opendir added %d files\n", td->o.nr_files);
	667
	668	return ret;
bbf6b540	669	}
cade3ef4 JA	670
	671	void dup_files(struct thread_data td, struct thread_data org)
	672	{
	673	struct fio_file *f;
	674	unsigned int i;
	675	size_t bytes;
	676
	677	if (!org->files)
	678	return;
	679
	680	bytes = org->files_index * sizeof(*f);
	681	td->files = malloc(bytes);
	682	memcpy(td->files, org->files, bytes);
	683
	684	for_each_file(td, f, i) {
	685	if (f->file_name)
	686	f->file_name = strdup(f->file_name);
	687	}
	688	}
f29b25a3 JA	689
	690	/*
	691	* Returns the index that matches the filename, or -1 if not there
	692	*/
	693	int get_fileno(struct thread_data td, const char fname)
	694	{
	695	struct fio_file *f;
	696	unsigned int i;
	697
	698	for_each_file(td, f, i)
	699	if (!strcmp(f->file_name, fname))
	700	return i;
	701
	702	return -1;
	703	}
	704
	705	/*
	706	* For log usage, where we add/open/close files automatically
	707	*/
	708	void free_release_files(struct thread_data *td)
	709	{
	710	close_files(td);
	711	td->files_index = 0;
	712	td->nr_normal_files = 0;
	713	}