104 static int ovl_real_fdget_meta(const struct file *file, struct fd *real,  in ovl_real_fdget_meta()  argument
110 	real->flags = 0;  in ovl_real_fdget_meta()
111 	real->file = file->private_data;  in ovl_real_fdget_meta()
119 	if (unlikely(file_inode(real->file) != d_inode(realpath.dentry))) {  in ovl_real_fdget_meta()
120 		real->flags = FDPUT_FPUT;  in ovl_real_fdget_meta()
121 		real->file = ovl_open_realfile(file, &realpath);  in ovl_real_fdget_meta()
123 		return PTR_ERR_OR_ZERO(real->file);  in ovl_real_fdget_meta()
127 	if (unlikely((file->f_flags ^ real->file->f_flags) & ~OVL_OPEN_FLAGS))  in ovl_real_fdget_meta()
128 		return ovl_change_flags(real->file, file->f_flags);  in ovl_real_fdget_meta()
133 static int ovl_real_fdget(const struct file *file, struct fd *real)  in ovl_real_fdget()  argument
136 		real->flags = 0;  in ovl_real_fdget()
137 		real->file = ovl_dir_real_file(file, false);  in ovl_real_fdget()
139 		return PTR_ERR_OR_ZERO(real->file);  in ovl_real_fdget()
142 	return ovl_real_fdget_meta(file, real, false);  in ovl_real_fdget()
179 	struct fd real;  in ovl_llseek()  local
184 	 * The two special cases below do not need to involve real fs,  in ovl_llseek()
195 	ret = ovl_real_fdget(file, &real);  in ovl_llseek()
201 	 * through copy up and modified on read/write, but only real  in ovl_llseek()
202 	 * fs knows how to SEEK_HOLE/SEEK_DATA and real fs may impose  in ovl_llseek()
204 	 * files, so we use the real file to perform seeks.  in ovl_llseek()
207 	real.file->f_pos = file->f_pos;  in ovl_llseek()
210 	ret = vfs_llseek(real.file, offset, whence);  in ovl_llseek()
213 	file->f_pos = real.file->f_pos;  in ovl_llseek()
216 	fdput(real);  in ovl_llseek()
299 	struct fd real;  in ovl_read_iter()  local
306 	ret = ovl_real_fdget(file, &real);  in ovl_read_iter()
312 	    !(real.file->f_mode & FMODE_CAN_ODIRECT))  in ovl_read_iter()
317 		ret = vfs_iter_read(real.file, iter, &iocb->ki_pos,  in ovl_read_iter()
327 		aio_req->fd = real;  in ovl_read_iter()
328 		real.flags = 0;  in ovl_read_iter()
330 		kiocb_clone(&aio_req->iocb, iocb, real.file);  in ovl_read_iter()
333 		ret = vfs_iocb_iter_read(real.file, &aio_req->iocb, iter);  in ovl_read_iter()
342 	fdput(real);  in ovl_read_iter()
351 	struct fd real;  in ovl_write_iter()  local
366 	ret = ovl_real_fdget(file, &real);  in ovl_write_iter()
372 	    !(real.file->f_mode & FMODE_CAN_ODIRECT))  in ovl_write_iter()
380 		file_start_write(real.file);  in ovl_write_iter()
381 		ret = vfs_iter_write(real.file, iter, &iocb->ki_pos,  in ovl_write_iter()
383 		file_end_write(real.file);  in ovl_write_iter()
394 		file_start_write(real.file);  in ovl_write_iter()
396 		__sb_writers_release(file_inode(real.file)->i_sb,  in ovl_write_iter()
398 		aio_req->fd = real;  in ovl_write_iter()
399 		real.flags = 0;  in ovl_write_iter()
401 		kiocb_clone(&aio_req->iocb, iocb, real.file);  in ovl_write_iter()
405 		ret = vfs_iocb_iter_write(real.file, &aio_req->iocb, iter);  in ovl_write_iter()
413 	fdput(real);  in ovl_write_iter()
424  * and file_start_write(real.file) in ovl_write_iter().
427  * the real file.
432 	struct fd real;  in ovl_splice_write()  local
444 	ret = ovl_real_fdget(out, &real);  in ovl_splice_write()
449 	file_start_write(real.file);  in ovl_splice_write()
451 	ret = iter_file_splice_write(pipe, real.file, ppos, len, flags);  in ovl_splice_write()
453 	file_end_write(real.file);  in ovl_splice_write()
457 	fdput(real);  in ovl_splice_write()
467 	struct fd real;  in ovl_fsync()  local
475 	ret = ovl_real_fdget_meta(file, &real, !datasync);  in ovl_fsync()
480 	if (file_inode(real.file) == ovl_inode_upper(file_inode(file))) {  in ovl_fsync()
482 		ret = vfs_fsync_range(real.file, start, end, datasync);  in ovl_fsync()
486 	fdput(real);  in ovl_fsync()
516 	struct fd real;  in ovl_fallocate()  local
520 	ret = ovl_real_fdget(file, &real);  in ovl_fallocate()
525 	ret = vfs_fallocate(real.file, mode, offset, len);  in ovl_fallocate()
531 	fdput(real);  in ovl_fallocate()
538 	struct fd real;  in ovl_fadvise()  local
542 	ret = ovl_real_fdget(file, &real);  in ovl_fadvise()
547 	ret = vfs_fadvise(real.file, offset, len, advice);  in ovl_fadvise()
550 	fdput(real);  in ovl_fadvise()
646 	struct fd real;  in ovl_flush()  local
650 	err = ovl_real_fdget(file, &real);  in ovl_flush()
654 	if (real.file->f_op->flush) {  in ovl_flush()
656 		err = real.file->f_op->flush(real.file, id);  in ovl_flush()
659 	fdput(real);  in ovl_flush()