blob: d57a3277563c3a45c13943dcc00da0d501e03a22 [file] [log] [blame]
#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 "smalloc.h"
#include "filehash.h"
static int root_warn;
/*
* Leaves f->fd open on success, caller must close
*/
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) ||
(td_write(td) && td->io_ops->flags & FIO_NOEXTEND))
new_layout = 1;
if (td_write(td) && !td->o.overwrite)
unlink_file = 1;
if (unlink_file || new_layout) {
dprint(FD_FILE, "layout unlink %s\n", f->file_name);
if ((unlink(f->file_name) < 0) && (errno != ENOENT)) {
td_verror(td, errno, "unlink");
return 1;
}
}
flags = O_WRONLY | O_CREAT;
if (new_layout)
flags |= O_TRUNC;
dprint(FD_FILE, "open file %s, flags %x\n", f->file_name, flags);
f->fd = open(f->file_name, flags, 0644);
if (f->fd < 0) {
td_verror(td, errno, "open");
return 1;
}
if (!new_layout)
goto done;
dprint(FD_FILE, "truncate file %s, size %llu\n", f->file_name,
f->real_file_size);
if (ftruncate(f->fd, f->real_file_size) == -1) {
td_verror(td, errno, "ftruncate");
goto err;
}
dprint(FD_FILE, "fallocate file %s, size %llu\n", f->file_name,
f->real_file_size);
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) {
dprint(FD_FILE, "terminate unlink %s\n", f->file_name);
unlink(f->file_name);
} else if (td->o.create_fsync) {
if (fsync(f->fd) < 0) {
td_verror(td, errno, "fsync");
goto err;
}
}
free(b);
done:
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, size_d;
long r;
r = os_random_long(&td->file_size_state);
size_d = td->o.file_size_high - td->o.file_size_low;
ret = (unsigned long long) ((double) size_d * (r / (RAND_MAX + 1.0)));
ret += td->o.file_size_low;
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;
}
static int __file_invalidate_cache(struct thread_data *td, struct fio_file *f,
unsigned long long off,
unsigned long long len)
{
int ret = 0;
if (len == -1ULL)
len = f->io_size;
if (off == -1ULL)
off = f->file_offset;
dprint(FD_IO, "invalidate cache %s: %llu/%llu\n", f->file_name, off,
len);
/*
* FIXME: add blockdev flushing too
*/
if (f->mmap)
ret = madvise(f->mmap, len, MADV_DONTNEED);
else if (f->filetype == FIO_TYPE_FILE) {
ret = fadvise(f->fd, off, len, 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;
} else if (ret > 0) {
td_verror(td, ret, "invalidate_cache");
return 1;
}
return ret;
}
int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
{
if (!(f->flags & FIO_FILE_OPEN))
return 0;
return __file_invalidate_cache(td, f, -1, -1);
}
int generic_close_file(struct thread_data fio_unused *td, struct fio_file *f)
{
int ret = 0;
dprint(FD_FILE, "fd close %s\n", f->file_name);
remove_file_hash(f);
if (close(f->fd) < 0)
ret = errno;
f->fd = -1;
return ret;
}
static int file_lookup_open(struct fio_file *f, int flags)
{
struct fio_file *__f;
int from_hash;
__f = lookup_file_hash(f->file_name);
if (__f) {
dprint(FD_FILE, "found file in hash %s\n", f->file_name);
/*
* racy, need the __f->lock locked
*/
f->lock = __f->lock;
f->lock_owner = __f->lock_owner;
f->lock_batch = __f->lock_batch;
f->lock_ddir = __f->lock_ddir;
from_hash = 1;
} else {
dprint(FD_FILE, "file not found in hash %s\n", f->file_name);
from_hash = 0;
}
f->fd = open(f->file_name, flags, 0600);
return from_hash;
}
int generic_open_file(struct thread_data *td, struct fio_file *f)
{
int is_std = 0;
int flags = 0;
int from_hash = 0;
dprint(FD_FILE, "fd open %s\n", f->file_name);
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 |= FIO_O_NOATIME;
open_again:
if (td_write(td)) {
if (!read_only)
flags |= O_RDWR;
if (f->filetype == FIO_TYPE_FILE)
flags |= O_CREAT;
if (is_std)
f->fd = dup(STDOUT_FILENO);
else
from_hash = file_lookup_open(f, flags);
} 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
from_hash = file_lookup_open(f, flags);
}
if (f->fd == -1) {
char buf[FIO_VERROR_SIZE];
int __e = errno;
if (errno == EPERM && (flags & FIO_O_NOATIME)) {
flags &= ~FIO_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;
if (!from_hash && f->fd != -1) {
if (add_file_hash(f)) {
int ret;
/*
* OK to ignore, we haven't done anything with it
*/
ret = generic_close_file(td, f);
goto open_again;
}
}
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;
dprint(FD_FILE, "open files\n");
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) {
dprint(FD_FILE, "get file size for %p/%d/%p\n", f, i,
f->file_name);
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;
dprint(FD_FILE, "setup files\n");
if (td->o.read_iolog_file)
return 0;
/*
* 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->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
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) {
unsigned long long old_len, extend_len;
if (!(f->flags & FIO_FILE_EXTEND))
continue;
assert(f->filetype == FIO_TYPE_FILE);
f->flags &= ~FIO_FILE_EXTEND;
old_len = f->real_file_size;
extend_len = f->io_size + f->file_offset - old_len;
f->real_file_size = (f->io_size + f->file_offset);
err = extend_file(td, f);
if (err)
break;
err = __file_invalidate_cache(td, f, old_len,
extend_len);
close(f->fd);
f->fd = -1;
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 || !td_random(td))
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 = smalloc(num_maps * sizeof(long));
if (f->file_map) {
f->num_maps = num_maps;
continue;
}
if (!td->o.softrandommap) {
log_err("fio: failed allocating random map. If running"
" a large number of jobs, try the 'norandommap'"
" option or set 'softrandommap'. Or give"
" a larger --alloc-size to fio.\n");
return 1;
}
log_info("fio: file %s failed allocating random map. Running "
"job without.\n", f->file_name);
f->num_maps = 0;
}
return 0;
}
void close_files(struct thread_data *td)
{
struct fio_file *f;
unsigned int i;
for_each_file(td, f, i)
td_io_close_file(td, f);
}
void close_and_free_files(struct thread_data *td)
{
struct fio_file *f;
unsigned int i;
dprint(FD_FILE, "close files\n");
for_each_file(td, f, i) {
if (td->o.unlink && f->filetype == FIO_TYPE_FILE) {
dprint(FD_FILE, "free unlink %s\n", f->file_name);
unlink(f->file_name);
}
td_io_close_file(td, f);
sfree(f->file_name);
f->file_name = NULL;
if (f->file_map) {
sfree(f->file_map);
f->file_map = NULL;
}
sfree(f);
}
td->o.filename = NULL;
free(td->files);
td->files_index = 0;
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;
dprint(FD_FILE, "add file %s\n", fname);
f = smalloc(sizeof(*f));
f->fd = -1;
dprint(FD_FILE, "resize file array to %d files\n", cur_files + 1);
td->files = realloc(td->files, (cur_files + 1) * sizeof(f));
td->files[cur_files] = f;
/*
* 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 = smalloc_strdup(file_name);
get_file_type(f);
switch (td->o.file_lock_mode) {
case FILE_LOCK_NONE:
break;
case FILE_LOCK_READWRITE:
f->lock = fio_mutex_rw_init();
break;
case FILE_LOCK_EXCLUSIVE:
f->lock = fio_mutex_init(1);
break;
default:
log_err("fio: unknown lock mode: %d\n", td->o.file_lock_mode);
assert(0);
}
td->files_index++;
if (f->filetype == FIO_TYPE_FILE)
td->nr_normal_files++;
dprint(FD_FILE, "file %p \"%s\" added at %d\n", f, f->file_name,
cur_files);
return cur_files;
}
void get_file(struct fio_file *f)
{
dprint(FD_FILE, "get file %s, ref=%d\n", f->file_name, f->references);
assert(f->flags & FIO_FILE_OPEN);
f->references++;
}
int put_file(struct thread_data *td, struct fio_file *f)
{
int f_ret = 0, ret = 0;
dprint(FD_FILE, "put file %s, ref=%d\n", f->file_name, f->references);
if (!(f->flags & FIO_FILE_OPEN))
return 0;
assert(f->references);
if (--f->references)
return 0;
if (should_fsync(td) && td->o.fsync_on_close)
f_ret = fsync(f->fd);
if (td->io_ops->close_file)
ret = td->io_ops->close_file(td, f);
if (!ret)
ret = f_ret;
td->nr_open_files--;
f->flags &= ~FIO_FILE_OPEN;
return ret;
}
void lock_file(struct thread_data *td, struct fio_file *f, enum fio_ddir ddir)
{
if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
return;
if (f->lock_owner == td && f->lock_batch--)
return;
if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
if (ddir == DDIR_READ)
fio_mutex_down_read(f->lock);
else
fio_mutex_down_write(f->lock);
} else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE)
fio_mutex_down(f->lock);
f->lock_owner = td;
f->lock_batch = td->o.lockfile_batch;
f->lock_ddir = ddir;
}
void unlock_file(struct thread_data *td, struct fio_file *f)
{
if (!f->lock || td->o.file_lock_mode == FILE_LOCK_NONE)
return;
if (f->lock_batch)
return;
if (td->o.file_lock_mode == FILE_LOCK_READWRITE) {
const int is_read = f->lock_ddir == DDIR_READ;
int val = fio_mutex_getval(f->lock);
if ((is_read && val == 1) || (!is_read && val == -1))
f->lock_owner = NULL;
if (is_read)
fio_mutex_up_read(f->lock);
else
fio_mutex_up_write(f->lock);
} else if (td->o.file_lock_mode == FILE_LOCK_EXCLUSIVE) {
int val = fio_mutex_getval(f->lock);
if (val == 0)
f->lock_owner = NULL;
fio_mutex_up(f->lock);
}
}
void unlock_file_all(struct thread_data *td, struct fio_file *f)
{
if (f->lock_owner != td)
return;
f->lock_batch = 0;
unlock_file(td, f);
}
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;
ret = recurse_dir(td, full_path);
if (ret)
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;
dprint(FD_FILE, "dup files: %d\n", org->files_index);
if (!org->files)
return;
td->files = malloc(org->files_index * sizeof(f));
for_each_file(org, f, i) {
struct fio_file *__f;
__f = smalloc(sizeof(*__f));
if (f->file_name)
__f->file_name = smalloc_strdup(f->file_name);
td->files[i] = __f;
}
}
/*
* 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;
}