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()
194 		mutex_lock(&of->prealloc_mutex);  in kernfs_file_direct_read()
204 	mutex_lock(&of->mutex);  in kernfs_file_direct_read()
205 	if (!kernfs_get_active(of->kn)) {  in kernfs_file_direct_read()
207 		mutex_unlock(&of->mutex);  in kernfs_file_direct_read()
211 	of->event = atomic_read(&of->kn->attr.open->event);  in kernfs_file_direct_read()
212 	ops = kernfs_ops(of->kn);  in kernfs_file_direct_read()
214 		len = ops->read(of, buf, len, *ppos);  in kernfs_file_direct_read()
218 	kernfs_put_active(of->kn);  in kernfs_file_direct_read()
219 	mutex_unlock(&of->mutex);  in kernfs_file_direct_read()
232 	if (buf == of->prealloc_buf)  in kernfs_file_direct_read()
233 		mutex_unlock(&of->prealloc_mutex);  in kernfs_file_direct_read()
249 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_fop_read()  local
251 	if (of->kn->flags & KERNFS_HAS_SEQ_SHOW)  in kernfs_fop_read()
254 		return kernfs_file_direct_read(of, user_buf, count, ppos);  in kernfs_fop_read()
276 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_fop_write()  local
281 	if (of->atomic_write_len) {  in kernfs_fop_write()
283 		if (len > of->atomic_write_len)  in kernfs_fop_write()
289 	buf = of->prealloc_buf;  in kernfs_fop_write()
291 		mutex_lock(&of->prealloc_mutex);  in kernfs_fop_write()
307 	mutex_lock(&of->mutex);  in kernfs_fop_write()
308 	if (!kernfs_get_active(of->kn)) {  in kernfs_fop_write()
309 		mutex_unlock(&of->mutex);  in kernfs_fop_write()
314 	ops = kernfs_ops(of->kn);  in kernfs_fop_write()
316 		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()
327 	if (buf == of->prealloc_buf)  in kernfs_fop_write()
328 		mutex_unlock(&of->prealloc_mutex);  in kernfs_fop_write()
337 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_open()  local
339 	if (!of->vm_ops)  in kernfs_vma_open()
342 	if (!kernfs_get_active(of->kn))  in kernfs_vma_open()
345 	if (of->vm_ops->open)  in kernfs_vma_open()
346 		of->vm_ops->open(vma);  in kernfs_vma_open()
348 	kernfs_put_active(of->kn);  in kernfs_vma_open()
354 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_fault()  local
357 	if (!of->vm_ops)  in kernfs_vma_fault()
360 	if (!kernfs_get_active(of->kn))  in kernfs_vma_fault()
364 	if (of->vm_ops->fault)  in kernfs_vma_fault()
365 		ret = of->vm_ops->fault(vmf);  in kernfs_vma_fault()
367 	kernfs_put_active(of->kn);  in kernfs_vma_fault()
374 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_page_mkwrite()  local
377 	if (!of->vm_ops)  in kernfs_vma_page_mkwrite()
380 	if (!kernfs_get_active(of->kn))  in kernfs_vma_page_mkwrite()
384 	if (of->vm_ops->page_mkwrite)  in kernfs_vma_page_mkwrite()
385 		ret = of->vm_ops->page_mkwrite(vmf);  in kernfs_vma_page_mkwrite()
389 	kernfs_put_active(of->kn);  in kernfs_vma_page_mkwrite()
397 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_access()  local
400 	if (!of->vm_ops)  in kernfs_vma_access()
403 	if (!kernfs_get_active(of->kn))  in kernfs_vma_access()
407 	if (of->vm_ops->access)  in kernfs_vma_access()
408 		ret = of->vm_ops->access(vma, addr, buf, len, write);  in kernfs_vma_access()
410 	kernfs_put_active(of->kn);  in kernfs_vma_access()
419 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_set_policy()  local
422 	if (!of->vm_ops)  in kernfs_vma_set_policy()
425 	if (!kernfs_get_active(of->kn))  in kernfs_vma_set_policy()
429 	if (of->vm_ops->set_policy)  in kernfs_vma_set_policy()
430 		ret = of->vm_ops->set_policy(vma, new);  in kernfs_vma_set_policy()
432 	kernfs_put_active(of->kn);  in kernfs_vma_set_policy()
440 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_vma_get_policy()  local
443 	if (!of->vm_ops)  in kernfs_vma_get_policy()
446 	if (!kernfs_get_active(of->kn))  in kernfs_vma_get_policy()
450 	if (of->vm_ops->get_policy)  in kernfs_vma_get_policy()
451 		pol = of->vm_ops->get_policy(vma, addr);  in kernfs_vma_get_policy()
453 	kernfs_put_active(of->kn);  in kernfs_vma_get_policy()
472 	struct kernfs_open_file *of = kernfs_of(file);  in kernfs_fop_mmap()  local
483 	if (!(of->kn->flags & KERNFS_HAS_MMAP))  in kernfs_fop_mmap()
486 	mutex_lock(&of->mutex);  in kernfs_fop_mmap()
489 	if (!kernfs_get_active(of->kn))  in kernfs_fop_mmap()
492 	ops = kernfs_ops(of->kn);  in kernfs_fop_mmap()
493 	rc = ops->mmap(of, vma);  in kernfs_fop_mmap()
506 	if (of->mmapped && of->vm_ops != vma->vm_ops)  in kernfs_fop_mmap()
518 	of->mmapped = true;  in kernfs_fop_mmap()
519 	of->vm_ops = vma->vm_ops;  in kernfs_fop_mmap()
522 	kernfs_put_active(of->kn);  in kernfs_fop_mmap()
524 	mutex_unlock(&of->mutex);  in kernfs_fop_mmap()
544 				struct kernfs_open_file *of)  in kernfs_get_open_node()  argument
560 		list_add_tail(&of->list, &on->files);  in kernfs_get_open_node()
595 				 struct kernfs_open_file *of)  in kernfs_put_open_node()  argument
603 	if (of)  in kernfs_put_open_node()
604 		list_del(&of->list);  in kernfs_put_open_node()
622 	struct kernfs_open_file *of;  in kernfs_fop_open()  local
648 	of = kzalloc(sizeof(struct kernfs_open_file), GFP_KERNEL);  in kernfs_fop_open()
649 	if (!of)  in kernfs_fop_open()
668 		mutex_init(&of->mutex);  in kernfs_fop_open()
670 		mutex_init(&of->mutex);  in kernfs_fop_open()
672 	of->kn = kn;  in kernfs_fop_open()
673 	of->file = file;  in kernfs_fop_open()
679 	of->atomic_write_len = ops->atomic_write_len;  in kernfs_fop_open()
690 		int len = of->atomic_write_len ?: PAGE_SIZE;  in kernfs_fop_open()
691 		of->prealloc_buf = kmalloc(len + 1, GFP_KERNEL);  in kernfs_fop_open()
693 		if (!of->prealloc_buf)  in kernfs_fop_open()
695 		mutex_init(&of->prealloc_mutex);  in kernfs_fop_open()
710 	of->seq_file = file->private_data;  in kernfs_fop_open()
711 	of->seq_file->private = of;  in kernfs_fop_open()
718 	error = kernfs_get_open_node(kn, of);  in kernfs_fop_open()
724 		error = ops->open(of);  in kernfs_fop_open()
734 	kernfs_put_open_node(kn, of);  in kernfs_fop_open()
738 	kfree(of->prealloc_buf);  in kernfs_fop_open()
739 	kfree(of);  in kernfs_fop_open()
747 				struct kernfs_open_file *of)  in kernfs_release_file()  argument
758 	if (!of->released) {  in kernfs_release_file()
764 		kn->attr.ops->release(of);  in kernfs_release_file()
765 		of->released = true;  in kernfs_release_file()
772 	struct kernfs_open_file *of = kernfs_of(filp);  in kernfs_fop_release()  local
776 		kernfs_release_file(kn, of);  in kernfs_fop_release()
780 	kernfs_put_open_node(kn, of);  in kernfs_fop_release()
782 	kfree(of->prealloc_buf);  in kernfs_fop_release()
783 	kfree(of);  in kernfs_fop_release()
791 	struct kernfs_open_file *of;  in kernfs_drain_open_files()  local
806 	list_for_each_entry(of, &on->files, list) {  in kernfs_drain_open_files()
807 		struct inode *inode = file_inode(of->file);  in kernfs_drain_open_files()
813 			kernfs_release_file(kn, of);  in kernfs_drain_open_files()
837 	struct kernfs_open_file *of = kernfs_of(filp);  in kernfs_fop_poll()  local
848 	if (of->event != atomic_read(&on->event))  in kernfs_fop_poll()