danos/system/configuration/protocol.csv

1	# /system/configuration/protocol.csv — who may claim, and who may reach, a name
2	# under /protocol (docs/os-development/protocol-namespace.md).
3	#
4	# init is the registrar: it serves /protocol, and every bind AND every open is
5	# checked against this file. It is AUTHORITATIVE — a name no row grants cannot be
6	# bound or reached, and a missing file means nothing may be bound or reached at
7	# all.
8	#
9	# A refused open is answered exactly as a name nobody bound is: -ENOENT, and no
10	# capability. That is not politeness, it is the model — the namespace IS the
11	# restriction, so what a process may not open simply does not exist for it, and
12	# Which is why a missing row here shows up as a client retrying forever rather
13	# than as an error: check this file first, and `readdir /protocol` second.
14	#
15	# '#' starts a comment (whole-line or trailing); blank lines are ignored.
16	# Whitespace around a field is trimmed, so columns may be padded. Four
17	# comma-separated fields per row:
18	#
19	# binary the claimant's binary path, exactly as the kernel stamped it at
20	# spawn (argv[0]) — unforgeable, read from the process records
21	# supervisor the authorized supervising TASK, written as the binary it runs —
22	# the path init was started as for its own services, the device
23	# manager's path for the drivers it starts. The one word that is not
24	# a path is 'kernel', because a kernel task has no binary; that is
25	# what the test harness's direct spawns look like.
26	# Matched by IDENTITY, not by spelling. Name alone is not identity —
27	# spawn is ungated, so a hostile process can start a granted binary
28	# itself and inherit its grants; and it can equally start its own
29	# instance of the *supervisor's* binary and have that spawn the
30	# granted one, at which point both names read correctly (the
31	# laundering deputy). So init also asks which task the supervisor
32	# is: 'kernel' means supervisor id 0, which only the kernel can
33	# confer; init's own path means this init; any other path means a
34	# task init spawned itself or one the kernel spawned. Task ids are
35	# monotonic and never reused, so an id cannot be borrowed.
36	# permission bind (provide this contract) | open (speak to it) |
37	# supervise (stand in someone else's chain — see below)
38	# name the contract, relative to /protocol
39	#
40	# A trailing '*' on any field matches any tail — how a subtree is granted whole.
41	#
42	# 'supervise' exists because attestation is one hop deep and the driver tree is
43	# three: the device manager starts the PS/2 bus, and the bus starts the keyboard
44	# and mouse drivers. Init never met the bus, so it cannot vouch for it by
45	# acquaintance — and it must not vouch for it by name, or the laundering deputy
46	# walks straight in. A 'supervise' row is the manifest saying it: a task running
47	# this binary, under this supervisor, may be the supervising task an 'open' row
48	# names, for this contract and no other. It grants the delegate nothing itself,
49	# and it is deliberately open-only — a delegate may vouch for what its children
50	# REACH, never for what they CLAIM, so every bind refusal is untouched by it.
51	#
52	# binary supervisor permission name
53	# --- the services init spawns from init.csv ---------------------------------
54	/system/services/input, /system/services/init, bind, input
55	/system/services/device-manager, /system/services/init, bind, device-manager
56	/system/services/volume-manager, /system/services/init, bind, volume-manager
57	/system/services/fat, /system/services/init, bind, vfs
58	/system/services/display, /system/services/init, bind, display
59	# The discovery service ships under one neutral name per firmware (docs/discovery.md);
60	# on x86 it is the acpi service, and what it provides is the power contract.
61	/system/services/discovery, /system/services/device-manager, bind, power
62	# --- the drivers, which the device manager spawns ---------------------------
63	# usb-transfer and block have NO bind rows: several processes provide each (one
64	# per controller, one per volume), so neither is ever a registry name —
65	# consumers get their provider's channel from the device manager's hello,
66	/system/drivers/ps2-bus, /system/services/device-manager, bind, ps2-bus
67	/system/drivers/virtio-gpu, /system/services/device-manager, bind, scanout
68	# --- the same providers when the kernel test harness starts them directly ---
69	# A scenario boot spawns its own providers instead of letting init do it
70	# (docs/security-track-plan.md, decision 9), so the same binaries appear with
71	# 'kernel' as the supervisor. Nothing else changes: the binary must still match.
72	/system/services/input, kernel, bind, input
73	/system/services/device-manager, kernel, bind, device-manager
74	/system/services/fat, kernel, bind, vfs
75	/system/services/display, kernel, bind, display
76	/system/services/discovery, kernel, bind, power
77	# --- test fixtures ----------------------------------------------------------
78	# The subtree rule, dogfooded: anything installed under /test may claim anything
79	# under /protocol/test, and nothing above it — whether the harness spawned it or
80	# another fixture did.
81	/test/*, kernel, bind, test/*
82	/test/*, /test/*, bind, test/*
83	# ============================================================================
84	# open — who may REACH each contract. One row per client per contract; a client
85	# with no row here simply finds the name absent, forever.
86	# ============================================================================
87	# --- init's own services ----------------------------------------------------
88	# fat reaches the device manager to be routed to its volume's block provider
89	# (block is not a name — see the bind section); the compositor reaches the
90	# scanout its driver announced, its own endpoint (the mouse-listener thread
91	# opens /protocol/display like any other client — threads share no handles),
92	# and the input stream that moves the cursor.
93	/system/services/fat, /system/services/init, open, device-manager
94	# The volume manager reaches the device manager to be routed to each storage
95	# provider's block channel, the same lineage acquisition fat makes today.
96	/system/services/volume-manager, /system/services/init, open, device-manager
97	/system/services/display, /system/services/init, open, scanout
98	/system/services/display, /system/services/init, open, display
99	/system/services/display, /system/services/init, open, input
100	/system/services/display-demo, /system/services/init, open, display
101	# --- the same two when the kernel test harness starts them directly ---------
102	/system/services/display, kernel, open, scanout
103	/system/services/display, kernel, open, display
104	/system/services/display, kernel, open, input
105	/system/services/display-demo, kernel, open, display
106	# --- the drivers, and the discovery service ---------------------------------
107	# Every driver says hello to the manager that started it — one row for the whole
108	# subtree, because that handshake is what being a driver means. The rest are per
109	# driver: the storage and HID class drivers talk to their controller, the HID
110	# drivers publish into the input stream, and the GPU driver announces its scanout
111	# to the compositor.
112	/system/drivers/*, /system/services/device-manager, open, device-manager
113	/system/services/discovery, /system/services/device-manager, open, device-manager
114	/system/drivers/usb-hid-keyboard, /system/services/device-manager, open, input
115	/system/drivers/usb-hid-mouse, /system/services/device-manager, open, input
116	/system/drivers/virtio-gpu, /system/services/device-manager, open, display
117	# --- the PS/2 child drivers, one hop further down ---------------------------
118	# The keyboard and mouse drivers are started by the BUS driver, not by the
119	# device manager — the one three-deep chain in the tree. Init cannot vouch for
120	# the bus by acquaintance (it never started it), so the manifest authorizes it
121	# explicitly, and only for the two contracts its children need.
122	/system/drivers/ps2-bus, /system/services/device-manager, supervise, ps2-bus
123	/system/drivers/ps2-bus, /system/services/device-manager, supervise, input
124	/system/drivers/ps2-keyboard, /system/drivers/ps2-bus, open, ps2-bus
125	/system/drivers/ps2-keyboard, /system/drivers/ps2-bus, open, input
126	/system/drivers/ps2-mouse, /system/drivers/ps2-bus, open, ps2-bus
127	/system/drivers/ps2-mouse, /system/drivers/ps2-bus, open, input
128	# --- test fixtures ----------------------------------------------------------
129	# The /protocol/test subtree is theirs whole, the way the bind rows give it to
130	# them. Everything ABOVE that subtree is named one fixture at a time, so a
131	# fixture reaches a system contract only where a scenario needs it — which is
132	# what leaves the rest genuinely absent for the rest of them (the protocol-denied
133	# case asks for one it was not given, and is told there is no such thing).
134	/test/*, kernel, open, test/*
135	/test/*, /test/*, open, test/*
136	/test/*, kernel, open, device-manager
137	/test/*, /system/services/device-manager, open, device-manager
138	/test/system/services/input-source, kernel, open, input
139	/test/system/services/input-test, kernel, open, input
140	# The guessable-id probe (test/system/services/badge-scope-test) runs as two
141	# processes of one binary: the owner, which the scenario spawns, and the intruder,
142	# which the owner spawns with the ids it holds. Both reach the compositor — the
143	# owner to create the layer, the intruder to be refused it — so the binary is
144	# named twice, once per supervisor. The second row needs no 'supervise'
145	# delegation: the owner was spawned by the KERNEL, which is a chain init can
146	# vouch for on its own.
147	/test/system/services/badge-scope-test, kernel, open, display
148	/test/system/services/badge-scope-test, /test/*, open, display
149	# The conformance probe (test/system/services/protocol-conformance-test) asks
150	# every provider its boot bound for the envelope's reserved verbs. It reaches
151	# ONLY the two contracts its own scenario boots a provider for, named one at a
152	# time exactly like the two rows above — no subtree, no wildcard. Everything else
153	# under /protocol stays absent for it, which is the point: the fixture walks the
154	# namespace listing and reports what it could not open rather than being handed
155	# the tree to make the test look broad.
156	/test/system/services/protocol-conformance-test, kernel, open, input
157	/test/system/services/protocol-conformance-test, kernel, open, display
158	# The laundering-deputy probe (test/system/services/protocol-registry-test) runs
159	# a grandchild whose supervisor is a fixture nobody authorized — that is the
160	# point of it, and its bind must stay refused. It still has to report the verdict
161	# it got, so its reporting channel, and nothing else, is delegated.
162	/test/*, /test/*, supervise, test/verdict