438 	struct files_struct *oldf, *newf;  in copy_files()  local
461 	newf = kmem_cache_alloc(files_cachep, SLAB_KERNEL);  in copy_files()
462 	if (!newf)   in copy_files()
465 	atomic_set(&newf->count, 1);  in copy_files()
467 	newf->file_lock	    = RW_LOCK_UNLOCKED;  in copy_files()
468 	newf->next_fd	    = 0;  in copy_files()
469 	newf->max_fds	    = NR_OPEN_DEFAULT;  in copy_files()
470 	newf->max_fdset	    = __FD_SETSIZE;  in copy_files()
471 	newf->close_on_exec = &newf->close_on_exec_init;  in copy_files()
472 	newf->open_fds	    = &newf->open_fds_init;  in copy_files()
473 	newf->fd	    = &newf->fd_array[0];  in copy_files()
479 		newf->max_fdset = 0;  in copy_files()
480 		write_lock(&newf->file_lock);  in copy_files()
481 		error = expand_fdset(newf, size-1);  in copy_files()
482 		write_unlock(&newf->file_lock);  in copy_files()
498 		newf->max_fds = 0;  in copy_files()
499 		write_lock(&newf->file_lock);  in copy_files()
500 		error = expand_fd_array(newf, open_files-1);  in copy_files()
501 		write_unlock(&newf->file_lock);  in copy_files()
504 		nfds = newf->max_fds;  in copy_files()
509 	new_fds = newf->fd;  in copy_files()
511 	memcpy(newf->open_fds->fds_bits, oldf->open_fds->fds_bits, open_files/8);  in copy_files()
512 	memcpy(newf->close_on_exec->fds_bits, oldf->close_on_exec->fds_bits, open_files/8);  in copy_files()
525                         FD_CLR(open_files - i, newf->open_fds);  in copy_files()
532 	size = (newf->max_fds - open_files) * sizeof(struct file *);  in copy_files()
537 	if (newf->max_fdset > open_files) {  in copy_files()
538 		int left = (newf->max_fdset-open_files)/8;  in copy_files()
541 		memset(&newf->open_fds->fds_bits[start], 0, left);  in copy_files()
542 		memset(&newf->close_on_exec->fds_bits[start], 0, left);  in copy_files()
545 	tsk->files = newf;  in copy_files()
551 	free_fdset (newf->close_on_exec, newf->max_fdset);  in copy_files()
552 	free_fdset (newf->open_fds, newf->max_fdset);  in copy_files()
553 	kmem_cache_free(files_cachep, newf);  in copy_files()