95 	struct kernfs_open_file *of = sf->private;  in kernfs_seq_stop_active()  local
96 	const struct kernfs_ops *ops = kernfs_ops(of->kn);  in kernfs_seq_stop_active()
100 	kernfs_put_active(of->kn);  in kernfs_seq_stop_active()
105 	struct kernfs_open_file *of = sf->private;  in kernfs_seq_start()  local
112 	mutex_lock(&of->mutex);  in kernfs_seq_start()
113 	if (!kernfs_get_active(of->kn))  in kernfs_seq_start()
116 	ops = kernfs_ops(of->kn);  in kernfs_seq_start()
134 	struct kernfs_open_file *of = sf->private;  in kernfs_seq_next()  local
135 	const struct kernfs_ops *ops = kernfs_ops(of->kn);  in kernfs_seq_next()
155 	struct kernfs_open_file *of = sf->private;  in kernfs_seq_stop()  local
159 	mutex_unlock(&of->mutex);  in kernfs_seq_stop()
164 	struct kernfs_open_file *of = sf->private;  in kernfs_seq_show()  local
166 	of->event = atomic_read(&of->kn->attr.open->event);  in kernfs_seq_show()
168 	return of->kn->attr.ops->seq_show(sf, v);  in kernfs_seq_show()
184 static ssize_t kernfs_file_direct_read(struct kernfs_open_file *of,  in kernfs_file_direct_read()  argument
192 	buf = of->prealloc_buf;  in kernfs_file_direct_read()
203 	mutex_lock(&of->mutex);  in kernfs_file_direct_read()
204 	if (!kernfs_get_active(of->kn)) {  in kernfs_file_direct_read()
206 		mutex_unlock(&of->mutex);  in kernfs_file_direct_read()
210 	of->event = atomic_read(&of->kn->attr.open->event);  in kernfs_file_direct_read()
211 	ops = kernfs_ops(of->kn);  in kernfs_file_direct_read()
213 		len = ops->read(of, buf, len, *ppos);  in kernfs_file_direct_read()
228 	kernfs_put_active(of->kn);  in kernfs_file_direct_read()
229 	mutex_unlock(&of->mutex);  in kernfs_file_direct_read()
231 	if (buf != of->prealloc_buf)  in kernfs_file_direct_read()
246 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_fop_read()  local
248 	if (of->kn->flags & KERNFS_HAS_SEQ_SHOW)  in kernfs_fop_read()
251 		return kernfs_file_direct_read(of, user_buf, count, ppos);  in kernfs_fop_read()
273 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_fop_write()  local
278 	if (of->atomic_write_len) {  in kernfs_fop_write()
280 		if (len > of->atomic_write_len)  in kernfs_fop_write()
286 	buf = of->prealloc_buf;  in kernfs_fop_write()
297 	mutex_lock(&of->mutex);  in kernfs_fop_write()
298 	if (!kernfs_get_active(of->kn)) {  in kernfs_fop_write()
299 		mutex_unlock(&of->mutex);  in kernfs_fop_write()
310 	ops = kernfs_ops(of->kn);  in kernfs_fop_write()
312 		len = ops->write(of, buf, len, *ppos);  in kernfs_fop_write()
320 	kernfs_put_active(of->kn);  in kernfs_fop_write()
321 	mutex_unlock(&of->mutex);  in kernfs_fop_write()
323 	if (buf != of->prealloc_buf)  in kernfs_fop_write()
331 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_open()  local
333 	if (!of->vm_ops)  in kernfs_vma_open()
336 	if (!kernfs_get_active(of->kn))  in kernfs_vma_open()
339 	if (of->vm_ops->open)  in kernfs_vma_open()
340 		of->vm_ops->open(vma);  in kernfs_vma_open()
342 	kernfs_put_active(of->kn);  in kernfs_vma_open()
348 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_fault()  local
351 	if (!of->vm_ops)  in kernfs_vma_fault()
354 	if (!kernfs_get_active(of->kn))  in kernfs_vma_fault()
358 	if (of->vm_ops->fault)  in kernfs_vma_fault()
359 		ret = of->vm_ops->fault(vma, vmf);  in kernfs_vma_fault()
361 	kernfs_put_active(of->kn);  in kernfs_vma_fault()
369 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_page_mkwrite()  local
372 	if (!of->vm_ops)  in kernfs_vma_page_mkwrite()
375 	if (!kernfs_get_active(of->kn))  in kernfs_vma_page_mkwrite()
379 	if (of->vm_ops->page_mkwrite)  in kernfs_vma_page_mkwrite()
380 		ret = of->vm_ops->page_mkwrite(vma, vmf);  in kernfs_vma_page_mkwrite()
384 	kernfs_put_active(of->kn);  in kernfs_vma_page_mkwrite()
392 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_access()  local
395 	if (!of->vm_ops)  in kernfs_vma_access()
398 	if (!kernfs_get_active(of->kn))  in kernfs_vma_access()
402 	if (of->vm_ops->access)  in kernfs_vma_access()
403 		ret = of->vm_ops->access(vma, addr, buf, len, write);  in kernfs_vma_access()
405 	kernfs_put_active(of->kn);  in kernfs_vma_access()
414 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_set_policy()  local
417 	if (!of->vm_ops)  in kernfs_vma_set_policy()
420 	if (!kernfs_get_active(of->kn))  in kernfs_vma_set_policy()
424 	if (of->vm_ops->set_policy)  in kernfs_vma_set_policy()
425 		ret = of->vm_ops->set_policy(vma, new);  in kernfs_vma_set_policy()
427 	kernfs_put_active(of->kn);  in kernfs_vma_set_policy()
435 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_get_policy()  local
438 	if (!of->vm_ops)  in kernfs_vma_get_policy()
441 	if (!kernfs_get_active(of->kn))  in kernfs_vma_get_policy()
445 	if (of->vm_ops->get_policy)  in kernfs_vma_get_policy()
446 		pol = of->vm_ops->get_policy(vma, addr);  in kernfs_vma_get_policy()
448 	kernfs_put_active(of->kn);  in kernfs_vma_get_policy()
467 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_fop_mmap()  local
478 	if (!(of->kn->flags & KERNFS_HAS_MMAP))  in kernfs_fop_mmap()
481 	mutex_lock(&of->mutex);  in kernfs_fop_mmap()
484 	if (!kernfs_get_active(of->kn))  in kernfs_fop_mmap()
487 	ops = kernfs_ops(of->kn);  in kernfs_fop_mmap()
488 	rc = ops->mmap(of, vma);  in kernfs_fop_mmap()
501 	if (of->mmapped && of->vm_ops != vma->vm_ops)  in kernfs_fop_mmap()
513 	of->mmapped = 1;  in kernfs_fop_mmap()
514 	of->vm_ops = vma->vm_ops;  in kernfs_fop_mmap()
517 	kernfs_put_active(of->kn);  in kernfs_fop_mmap()
519 	mutex_unlock(&of->mutex);  in kernfs_fop_mmap()
539 				struct kernfs_open_file *of)  in kernfs_get_open_node()  argument
555 		list_add_tail(&of->list, &on->files);  in kernfs_get_open_node()
590 				 struct kernfs_open_file *of)  in kernfs_put_open_node()  argument
598 	if (of)  in kernfs_put_open_node()
599 		list_del(&of->list);  in kernfs_put_open_node()
617 	struct kernfs_open_file *of;  in kernfs_fop_open()  local
643 	of = kzalloc(sizeof(struct kernfs_open_file), GFP_KERNEL);  in kernfs_fop_open()
644 	if (!of)  in kernfs_fop_open()
663 		mutex_init(&of->mutex);  in kernfs_fop_open()
665 		mutex_init(&of->mutex);  in kernfs_fop_open()
667 	of->kn = kn;  in kernfs_fop_open()
668 	of->file = file;  in kernfs_fop_open()
674 	of->atomic_write_len = ops->atomic_write_len;  in kernfs_fop_open()
685 		int len = of->atomic_write_len ?: PAGE_SIZE;  in kernfs_fop_open()
686 		of->prealloc_buf = kmalloc(len + 1, GFP_KERNEL);  in kernfs_fop_open()
688 		if (!of->prealloc_buf)  in kernfs_fop_open()
704 	((struct seq_file *)file->private_data)->private = of;  in kernfs_fop_open()
711 	error = kernfs_get_open_node(kn, of);  in kernfs_fop_open()
722 	kfree(of->prealloc_buf);  in kernfs_fop_open()
723 	kfree(of);  in kernfs_fop_open()
732 	struct kernfs_open_file *of = kernfs_of(filp);  in kernfs_fop_release()  local
734 	kernfs_put_open_node(kn, of);  in kernfs_fop_release()
736 	kfree(of->prealloc_buf);  in kernfs_fop_release()
737 	kfree(of);  in kernfs_fop_release()
745 	struct kernfs_open_file *of;  in kernfs_unmap_bin_file()  local
759 	list_for_each_entry(of, &on->files, list) {  in kernfs_unmap_bin_file()
760 		struct inode *inode = file_inode(of->file);  in kernfs_unmap_bin_file()
784 	struct kernfs_open_file *of = kernfs_of(filp);  in kernfs_fop_poll()  local
795 	if (of->event != atomic_read(&on->event))  in kernfs_fop_poll()