147 struct fuse_backing *fuse_backing_get(struct fuse_backing *fb)  in fuse_backing_get()  argument
149 	if (fb && refcount_inc_not_zero(&fb->count))  in fuse_backing_get()
150 		return fb;  in fuse_backing_get()
154 static void fuse_backing_free(struct fuse_backing *fb)  in fuse_backing_free()  argument
156 	pr_debug("%s: fb=0x%p\n", __func__, fb);  in fuse_backing_free()
158 	if (fb->file)  in fuse_backing_free()
159 		fput(fb->file);  in fuse_backing_free()
160 	put_cred(fb->cred);  in fuse_backing_free()
161 	kfree_rcu(fb, rcu);  in fuse_backing_free()
164 void fuse_backing_put(struct fuse_backing *fb)  in fuse_backing_put()  argument
166 	if (fb && refcount_dec_and_test(&fb->count))  in fuse_backing_put()
167 		fuse_backing_free(fb);  in fuse_backing_put()
175 static int fuse_backing_id_alloc(struct fuse_conn *fc, struct fuse_backing *fb)  in fuse_backing_id_alloc()  argument
182 	id = idr_alloc_cyclic(&fc->backing_files_map, fb, 1, 0, GFP_ATOMIC);  in fuse_backing_id_alloc()
193 	struct fuse_backing *fb;  in fuse_backing_id_remove()  local
196 	fb = idr_remove(&fc->backing_files_map, id);  in fuse_backing_id_remove()
199 	return fb;  in fuse_backing_id_remove()
204 	struct fuse_backing *fb = p;  in fuse_backing_id_free()  local
206 	WARN_ON_ONCE(refcount_read(&fb->count) != 1);  in fuse_backing_id_free()
207 	fuse_backing_free(fb);  in fuse_backing_id_free()
221 	struct fuse_backing *fb = NULL;  in fuse_backing_open()  local
245 	fb = kmalloc(sizeof(struct fuse_backing), GFP_KERNEL);  in fuse_backing_open()
247 	if (!fb)  in fuse_backing_open()
250 	fb->file = file;  in fuse_backing_open()
251 	fb->cred = prepare_creds();  in fuse_backing_open()
252 	refcount_set(&fb->count, 1);  in fuse_backing_open()
254 	res = fuse_backing_id_alloc(fc, fb);  in fuse_backing_open()
256 		fuse_backing_free(fb);  in fuse_backing_open()
257 		fb = NULL;  in fuse_backing_open()
261 	pr_debug("%s: fb=0x%p, ret=%i\n", __func__, fb, res);  in fuse_backing_open()
272 	struct fuse_backing *fb = NULL;  in fuse_backing_close()  local
287 	fb = fuse_backing_id_remove(fc, backing_id);  in fuse_backing_close()
288 	if (!fb)  in fuse_backing_close()
291 	fuse_backing_put(fb);  in fuse_backing_close()
294 	pr_debug("%s: fb=0x%p, err=%i\n", __func__, fb, err);  in fuse_backing_close()
302  * Returns an fb object with elevated refcount to be stored in fuse inode.
310 	struct fuse_backing *fb = NULL;  in fuse_passthrough_open()  local
319 	fb = idr_find(&fc->backing_files_map, backing_id);  in fuse_passthrough_open()
320 	fb = fuse_backing_get(fb);  in fuse_passthrough_open()
324 	if (!fb)  in fuse_passthrough_open()
329 					 &fb->file->f_path, fb->cred);  in fuse_passthrough_open()
332 		fuse_backing_put(fb);  in fuse_passthrough_open()
338 	ff->cred = get_cred(fb->cred);  in fuse_passthrough_open()
340 	pr_debug("%s: backing_id=%d, fb=0x%p, backing_file=0x%p, err=%i\n", __func__,  in fuse_passthrough_open()
341 		 backing_id, fb, ff->passthrough, err);  in fuse_passthrough_open()
343 	return err ? ERR_PTR(err) : fb;  in fuse_passthrough_open()
346 void fuse_passthrough_release(struct fuse_file *ff, struct fuse_backing *fb)  in fuse_passthrough_release()  argument
348 	pr_debug("%s: fb=0x%p, backing_file=0x%p\n", __func__,  in fuse_passthrough_release()
349 		 fb, ff->passthrough);  in fuse_passthrough_release()