108 static int ovl_real_fdget_meta(const struct file *file, struct fd *real,  in ovl_real_fdget_meta()  argument
114 	real->flags = 0;  in ovl_real_fdget_meta()
115 	real->file = file->private_data;  in ovl_real_fdget_meta()
123 	if (unlikely(file_inode(real->file) != realinode)) {  in ovl_real_fdget_meta()
124 		real->flags = FDPUT_FPUT;  in ovl_real_fdget_meta()
125 		real->file = ovl_open_realfile(file, realinode);  in ovl_real_fdget_meta()
127 		return PTR_ERR_OR_ZERO(real->file);  in ovl_real_fdget_meta()
131 	if (unlikely((file->f_flags ^ real->file->f_flags) & ~OVL_OPEN_FLAGS))  in ovl_real_fdget_meta()
132 		return ovl_change_flags(real->file, file->f_flags);  in ovl_real_fdget_meta()
137 static int ovl_real_fdget(const struct file *file, struct fd *real)  in ovl_real_fdget()  argument
140 		real->flags = 0;  in ovl_real_fdget()
141 		real->file = ovl_dir_real_file(file, false);  in ovl_real_fdget()
143 		return PTR_ERR_OR_ZERO(real->file);  in ovl_real_fdget()
146 	return ovl_real_fdget_meta(file, real, false);  in ovl_real_fdget()
180 	struct fd real;  in ovl_llseek()  local
185 	 * The two special cases below do not need to involve real fs,  in ovl_llseek()
196 	ret = ovl_real_fdget(file, &real);  in ovl_llseek()
202 	 * through copy up and modified on read/write, but only real  in ovl_llseek()
203 	 * fs knows how to SEEK_HOLE/SEEK_DATA and real fs may impose  in ovl_llseek()
205 	 * files, so we use the real file to perform seeks.  in ovl_llseek()
208 	real.file->f_pos = file->f_pos;  in ovl_llseek()
211 	ret = vfs_llseek(real.file, offset, whence);  in ovl_llseek()
214 	file->f_pos = real.file->f_pos;  in ovl_llseek()
217 	fdput(real);  in ovl_llseek()
300 	struct fd real;  in ovl_read_iter()  local
307 	ret = ovl_real_fdget(file, &real);  in ovl_read_iter()
313 	    (!real.file->f_mapping->a_ops ||  in ovl_read_iter()
314 	     !real.file->f_mapping->a_ops->direct_IO))  in ovl_read_iter()
319 		ret = vfs_iter_read(real.file, iter, &iocb->ki_pos,  in ovl_read_iter()
329 		real.flags = 0;  in ovl_read_iter()
331 		kiocb_clone(&aio_req->iocb, iocb, get_file(real.file));  in ovl_read_iter()
334 		ret = vfs_iocb_iter_read(real.file, &aio_req->iocb, iter);  in ovl_read_iter()
343 	fdput(real);  in ovl_read_iter()
352 	struct fd real;  in ovl_write_iter()  local
367 	ret = ovl_real_fdget(file, &real);  in ovl_write_iter()
373 	    (!real.file->f_mapping->a_ops ||  in ovl_write_iter()
374 	     !real.file->f_mapping->a_ops->direct_IO))  in ovl_write_iter()
382 		file_start_write(real.file);  in ovl_write_iter()
383 		ret = vfs_iter_write(real.file, iter, &iocb->ki_pos,  in ovl_write_iter()
385 		file_end_write(real.file);  in ovl_write_iter()
396 		file_start_write(real.file);  in ovl_write_iter()
398 		__sb_writers_release(file_inode(real.file)->i_sb,  in ovl_write_iter()
400 		real.flags = 0;  in ovl_write_iter()
402 		kiocb_clone(&aio_req->iocb, iocb, get_file(real.file));  in ovl_write_iter()
406 		ret = vfs_iocb_iter_write(real.file, &aio_req->iocb, iter);  in ovl_write_iter()
414 	fdput(real);  in ovl_write_iter()
425  * and file_start_write(real.file) in ovl_write_iter().
428  * the real file.
433 	struct fd real;  in ovl_splice_write()  local
446 	ret = ovl_real_fdget(out, &real);  in ovl_splice_write()
451 	file_start_write(real.file);  in ovl_splice_write()
453 	ret = iter_file_splice_write(pipe, real.file, ppos, len, flags);  in ovl_splice_write()
455 	file_end_write(real.file);  in ovl_splice_write()
459 	fdput(real);  in ovl_splice_write()
469 	struct fd real;  in ovl_fsync()  local
477 	ret = ovl_real_fdget_meta(file, &real, !datasync);  in ovl_fsync()
482 	if (file_inode(real.file) == ovl_inode_upper(file_inode(file))) {  in ovl_fsync()
484 		ret = vfs_fsync_range(real.file, start, end, datasync);  in ovl_fsync()
488 	fdput(real);  in ovl_fsync()
527 	struct fd real;  in ovl_fallocate()  local
538 	ret = ovl_real_fdget(file, &real);  in ovl_fallocate()
543 	ret = vfs_fallocate(real.file, mode, offset, len);  in ovl_fallocate()
549 	fdput(real);  in ovl_fallocate()
559 	struct fd real;  in ovl_fadvise()  local
563 	ret = ovl_real_fdget(file, &real);  in ovl_fadvise()
568 	ret = vfs_fadvise(real.file, offset, len, advice);  in ovl_fadvise()
571 	fdput(real);  in ovl_fadvise()
579 	struct fd real;  in ovl_real_ioctl()  local
582 	ret = ovl_real_fdget(file, &real);  in ovl_real_ioctl()
586 	ret = security_file_ioctl(real.file, cmd, arg);  in ovl_real_ioctl()
592 		ret = vfs_ioctl(real.file, cmd, arg);  in ovl_real_ioctl()
595 	fdput(real);  in ovl_real_ioctl()