111 static int ovl_real_fdget_meta(const struct file *file, struct fd *real,  in ovl_real_fdget_meta()  argument
117 	real->flags = 0;  in ovl_real_fdget_meta()
118 	real->file = file->private_data;  in ovl_real_fdget_meta()
126 	if (unlikely(file_inode(real->file) != realinode)) {  in ovl_real_fdget_meta()
127 		real->flags = FDPUT_FPUT;  in ovl_real_fdget_meta()
128 		real->file = ovl_open_realfile(file, realinode);  in ovl_real_fdget_meta()
130 		return PTR_ERR_OR_ZERO(real->file);  in ovl_real_fdget_meta()
134 	if (unlikely((file->f_flags ^ real->file->f_flags) & ~OVL_OPEN_FLAGS))  in ovl_real_fdget_meta()
135 		return ovl_change_flags(real->file, file->f_flags);  in ovl_real_fdget_meta()
140 static int ovl_real_fdget(const struct file *file, struct fd *real)  in ovl_real_fdget()  argument
143 		real->flags = 0;  in ovl_real_fdget()
144 		real->file = ovl_dir_real_file(file, false);  in ovl_real_fdget()
146 		return PTR_ERR_OR_ZERO(real->file);  in ovl_real_fdget()
149 	return ovl_real_fdget_meta(file, real, false);  in ovl_real_fdget()
183 	struct fd real;  in ovl_llseek()  local
188 	 * The two special cases below do not need to involve real fs,  in ovl_llseek()
199 	ret = ovl_real_fdget(file, &real);  in ovl_llseek()
205 	 * through copy up and modified on read/write, but only real  in ovl_llseek()
206 	 * fs knows how to SEEK_HOLE/SEEK_DATA and real fs may impose  in ovl_llseek()
208 	 * files, so we use the real file to perform seeks.  in ovl_llseek()
211 	real.file->f_pos = file->f_pos;  in ovl_llseek()
214 	ret = vfs_llseek(real.file, offset, whence);  in ovl_llseek()
217 	file->f_pos = real.file->f_pos;  in ovl_llseek()
220 	fdput(real);  in ovl_llseek()
287 	struct fd real;  in ovl_read_iter()  local
294 	ret = ovl_real_fdget(file, &real);  in ovl_read_iter()
300 	    (!real.file->f_mapping->a_ops ||  in ovl_read_iter()
301 	     !real.file->f_mapping->a_ops->direct_IO))  in ovl_read_iter()
306 		ret = vfs_iter_read(real.file, iter, &iocb->ki_pos,  in ovl_read_iter()
317 		aio_req->fd = real;  in ovl_read_iter()
318 		real.flags = 0;  in ovl_read_iter()
320 		kiocb_clone(&aio_req->iocb, iocb, real.file);  in ovl_read_iter()
323 		ret = vfs_iocb_iter_read(real.file, &aio_req->iocb, iter);  in ovl_read_iter()
333 	fdput(real);  in ovl_read_iter()
342 	struct fd real;  in ovl_write_iter()  local
357 	ret = ovl_real_fdget(file, &real);  in ovl_write_iter()
363 	    (!real.file->f_mapping->a_ops ||  in ovl_write_iter()
364 	     !real.file->f_mapping->a_ops->direct_IO))  in ovl_write_iter()
372 		file_start_write(real.file);  in ovl_write_iter()
373 		ret = vfs_iter_write(real.file, iter, &iocb->ki_pos,  in ovl_write_iter()
375 		file_end_write(real.file);  in ovl_write_iter()
386 		file_start_write(real.file);  in ovl_write_iter()
388 		__sb_writers_release(file_inode(real.file)->i_sb,  in ovl_write_iter()
390 		aio_req->fd = real;  in ovl_write_iter()
391 		real.flags = 0;  in ovl_write_iter()
393 		kiocb_clone(&aio_req->iocb, iocb, real.file);  in ovl_write_iter()
397 		ret = vfs_iocb_iter_write(real.file, &aio_req->iocb, iter);  in ovl_write_iter()
405 	fdput(real);  in ovl_write_iter()
416  * and file_start_write(real.file) in ovl_write_iter().
419  * the real file.
424 	struct fd real;  in ovl_splice_write()  local
437 	ret = ovl_real_fdget(out, &real);  in ovl_splice_write()
442 	file_start_write(real.file);  in ovl_splice_write()
444 	ret = iter_file_splice_write(pipe, real.file, ppos, len, flags);  in ovl_splice_write()
446 	file_end_write(real.file);  in ovl_splice_write()
450 	fdput(real);  in ovl_splice_write()
460 	struct fd real;  in ovl_fsync()  local
468 	ret = ovl_real_fdget_meta(file, &real, !datasync);  in ovl_fsync()
473 	if (file_inode(real.file) == ovl_inode_upper(file_inode(file))) {  in ovl_fsync()
475 		ret = vfs_fsync_range(real.file, start, end, datasync);  in ovl_fsync()
479 	fdput(real);  in ovl_fsync()
518 	struct fd real;  in ovl_fallocate()  local
522 	ret = ovl_real_fdget(file, &real);  in ovl_fallocate()
527 	ret = vfs_fallocate(real.file, mode, offset, len);  in ovl_fallocate()
533 	fdput(real);  in ovl_fallocate()
540 	struct fd real;  in ovl_fadvise()  local
544 	ret = ovl_real_fdget(file, &real);  in ovl_fadvise()
549 	ret = vfs_fadvise(real.file, offset, len, advice);  in ovl_fadvise()
552 	fdput(real);  in ovl_fadvise()
560 	struct fd real;  in ovl_real_ioctl()  local
563 	ret = ovl_real_fdget(file, &real);  in ovl_real_ioctl()
567 	ret = security_file_ioctl(real.file, cmd, arg);  in ovl_real_ioctl()
573 		ret = vfs_ioctl(real.file, cmd, arg);  in ovl_real_ioctl()
576 	fdput(real);  in ovl_real_ioctl()