12 struct fuse_backing *fuse_backing_get(struct fuse_backing *fb)  in fuse_backing_get()  argument
14 	if (fb && refcount_inc_not_zero(&fb->count))  in fuse_backing_get()
15 		return fb;  in fuse_backing_get()
19 static void fuse_backing_free(struct fuse_backing *fb)  in fuse_backing_free()  argument
21 	pr_debug("%s: fb=0x%p\n", __func__, fb);  in fuse_backing_free()
23 	if (fb->file)  in fuse_backing_free()
24 		fput(fb->file);  in fuse_backing_free()
25 	put_cred(fb->cred);  in fuse_backing_free()
26 	kfree_rcu(fb, rcu);  in fuse_backing_free()
29 void fuse_backing_put(struct fuse_backing *fb)  in fuse_backing_put()  argument
31 	if (fb && refcount_dec_and_test(&fb->count))  in fuse_backing_put()
32 		fuse_backing_free(fb);  in fuse_backing_put()
40 static int fuse_backing_id_alloc(struct fuse_conn *fc, struct fuse_backing *fb)  in fuse_backing_id_alloc()  argument
47 	id = idr_alloc_cyclic(&fc->backing_files_map, fb, 1, 0, GFP_ATOMIC);  in fuse_backing_id_alloc()
58 	struct fuse_backing *fb;  in fuse_backing_id_remove()  local
61 	fb = idr_remove(&fc->backing_files_map, id);  in fuse_backing_id_remove()
64 	return fb;  in fuse_backing_id_remove()
69 	struct fuse_backing *fb = p;  in fuse_backing_id_free()  local
71 	WARN_ON_ONCE(refcount_read(&fb->count) != 1);  in fuse_backing_id_free()
72 	fuse_backing_free(fb);  in fuse_backing_id_free()
86 	struct fuse_backing *fb = NULL;  in fuse_backing_open()  local
115 	fb = kmalloc(sizeof(struct fuse_backing), GFP_KERNEL);  in fuse_backing_open()
117 	if (!fb)  in fuse_backing_open()
120 	fb->file = file;  in fuse_backing_open()
121 	fb->cred = prepare_creds();  in fuse_backing_open()
122 	refcount_set(&fb->count, 1);  in fuse_backing_open()
124 	res = fuse_backing_id_alloc(fc, fb);  in fuse_backing_open()
126 		fuse_backing_free(fb);  in fuse_backing_open()
127 		fb = NULL;  in fuse_backing_open()
131 	pr_debug("%s: fb=0x%p, ret=%i\n", __func__, fb, res);  in fuse_backing_open()
142 	struct fuse_backing *fb = NULL;  in fuse_backing_close()  local
157 	fb = fuse_backing_id_remove(fc, backing_id);  in fuse_backing_close()
158 	if (!fb)  in fuse_backing_close()
161 	fuse_backing_put(fb);  in fuse_backing_close()
164 	pr_debug("%s: fb=0x%p, err=%i\n", __func__, fb, err);  in fuse_backing_close()
171 	struct fuse_backing *fb;  in fuse_backing_lookup()  local
174 	fb = idr_find(&fc->backing_files_map, backing_id);  in fuse_backing_lookup()
175 	fb = fuse_backing_get(fb);  in fuse_backing_lookup()
178 	return fb;  in fuse_backing_lookup()