internal/outcome: populate instance metadata for PipeWire

These have similar semantics to equivalent Wayland security-context-v1 fields.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/outcome/run_test.go

@@ -68,7 +68,11 @@ func TestOutcomeRun(t *testing.T) {
 			).
 
 			// spPipeWireOp
-			PipeWire(m("/tmp/hakurei.0/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/pipewire")).
+			PipeWire(
+				m("/tmp/hakurei.0/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/pipewire"),
+				"org.chromium.Chromium",
+				"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+			).
 
 			// spDBusOp
 			MustProxyDBus(
@@ -335,7 +339,7 @@ func TestOutcomeRun(t *testing.T) {
 			Ensure(m("/tmp/hakurei.0/tmpdir/9"), 01700).UpdatePermType(system.User, m("/tmp/hakurei.0/tmpdir/9"), acl.Read, acl.Write, acl.Execute).
 			Ephemeral(system.Process, m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c"), 0711).
 			Wayland(m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/wayland"), m("/run/user/1971/wayland-0"), "org.chromium.Chromium", "ebf083d1b175911782d413369b64ce7c").
-			PipeWire(m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/pipewire")).
+			PipeWire(m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/pipewire"), "org.chromium.Chromium", "ebf083d1b175911782d413369b64ce7c").
 			MustProxyDBus(&hst.BusConfig{
 				Talk: []string{
 					"org.freedesktop.Notifications",
@@ -486,7 +490,7 @@ func TestOutcomeRun(t *testing.T) {
 			Ensure(m("/run/user/1971/hakurei"), 0700).UpdatePermType(system.User, m("/run/user/1971/hakurei"), acl.Execute).
 			UpdatePermType(hst.EWayland, m("/run/user/1971/wayland-0"), acl.Read, acl.Write, acl.Execute).
 			Ephemeral(system.Process, m("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1"), 0711).
-			PipeWire(m("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/pipewire")).
+			PipeWire(m("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/pipewire"), "org.chromium.Chromium", "8e2c76b066dabe574cf073bdb46eb5c1").
 			MustProxyDBus(&hst.BusConfig{
 				Talk: []string{
 					"org.freedesktop.FileManager1", "org.freedesktop.Notifications",

internal/outcome/sppipewire.go

@@ -18,7 +18,12 @@ func (s spPipeWireOp) toSystem(state *outcomeStateSys) error {
 		return errNotEnabled
 	}
 
-	state.sys.PipeWire(state.instance().Append("pipewire"))
+	appId := state.appId
+	if appId == "" {
+		// use instance ID in case app id is not set
+		appId = "app.hakurei." + state.id.String()
+	}
+	state.sys.PipeWire(state.instance().Append("pipewire"), appId, state.id.String())
 	return nil
 }
 

internal/outcome/sppipewire_test.go

@@ -30,7 +30,9 @@ func TestSpPipeWireOp(t *testing.T) {
 			Ephemeral(system.Process, m(wantInstancePrefix), 0711).
 			// toSystem
 			PipeWire(
-				m(wantInstancePrefix + "/pipewire"),
+				m(wantInstancePrefix+"/pipewire"),
+				"org.chromium.Chromium",
+				"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
 			), sysUsesInstance(nil), nil, insertsOps(afterSpRuntimeOp(nil)), []stub.Call{
 			// this op configures the container state and does not make calls during toContainer
 		}, &container.Params{

internal/system/pipewire.go

@@ -14,8 +14,8 @@ import (
 // PipeWire maintains a pipewire socket with SecurityContext attached via [pipewire].
 // The socket stops accepting connections once the pipe referred to by sync is closed.
 // The socket is pathname only and is destroyed on revert.
-func (sys *I) PipeWire(dst *check.Absolute) *I {
-	sys.ops = append(sys.ops, &pipewireOp{nil, dst})
+func (sys *I) PipeWire(dst *check.Absolute, appID, instanceID string) *I {
+	sys.ops = append(sys.ops, &pipewireOp{nil, dst, appID, instanceID})
 	return sys
 }
 
@@ -23,6 +23,8 @@ func (sys *I) PipeWire(dst *check.Absolute) *I {
 type pipewireOp struct {
 	scc io.Closer
 	dst *check.Absolute
+
+	appID, instanceID string
 }
 
 func (p *pipewireOp) Type() hst.Enablement { return Process }
@@ -56,6 +58,8 @@ func (p *pipewireOp) apply(sys *I) (err error) {
 
 	if p.scc, err = securityContext.BindAndCreate(p.dst.String(), pipewire.SPADict{
 		{Key: pipewire.PW_KEY_SEC_ENGINE, Value: "app.hakurei"},
+		{Key: pipewire.PW_KEY_SEC_APP_ID, Value: p.appID},
+		{Key: pipewire.PW_KEY_SEC_INSTANCE_ID, Value: p.instanceID},
 		{Key: pipewire.PW_KEY_ACCESS, Value: "restricted"},
 	}); err != nil {
 		return newOpError("pipewire", err, false)
@@ -92,7 +96,9 @@ func (p *pipewireOp) revert(sys *I, _ *Criteria) error {
 func (p *pipewireOp) Is(o Op) bool {
 	target, ok := o.(*pipewireOp)
 	return ok && p != nil && target != nil &&
-		p.dst.Is(target.dst)
+		p.dst.Is(target.dst) &&
+		p.appID == target.appID &&
+		p.instanceID == target.instanceID
 }
 
 func (p *pipewireOp) Path() string   { return p.dst.String() }

internal/system/pipewire_test.go

@@ -18,6 +18,8 @@ func TestPipeWireOp(t *testing.T) {
 	checkOpBehaviour(t, checkNoParallel, []opBehaviourTestCase{
 		{"success", 0xbeef, 0xff, &pipewireOp{nil,
 			m(path.Join(t.TempDir(), "pipewire")),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, []stub.Call{
 			call("pipewireConnect", stub.ExpectArgs{}, func() *pipewire.Context {
 				if ctx, err := pipewire.New(&stubPipeWireConn{sendmsg: []string{
@@ -154,11 +156,11 @@ func TestPipeWireOp(t *testing.T) {
 					string([]byte{
 						// header: SecurityContext::Create
 						3, 0, 0, 0,
-						0xa8, 0, 0, 1,
+						0x40, 1, 0, 1,
 						5, 0, 0, 0,
 						2, 0, 0, 0,
 						// Struct
-						0xa0, 0, 0, 0,
+						0x38, 1, 0, 0,
 						0xe, 0, 0, 0,
 						// Fd: listen_fd = 1
 						8, 0, 0, 0,
@@ -171,12 +173,12 @@ func TestPipeWireOp(t *testing.T) {
 						0, 0, 0, 0,
 						0, 0, 0, 0,
 						// Struct: spa_dict
-						0x78, 0, 0, 0,
+						0x10, 1, 0, 0,
 						0xe, 0, 0, 0,
-						// Int: n_items = 2
+						// Int: n_items = 4
+						4, 0, 0, 0,
 						4, 0, 0, 0,
 						4, 0, 0, 0,
-						2, 0, 0, 0,
 						0, 0, 0, 0,
 						// String: key = "pipewire.sec.engine"
 						0x14, 0, 0, 0,
@@ -194,6 +196,48 @@ func TestPipeWireOp(t *testing.T) {
 						0x68, 0x61, 0x6b, 0x75,
 						0x72, 0x65, 0x69, 0,
 						0, 0, 0, 0,
+						// String: key = "pipewire.sec.app-id"
+						0x14, 0, 0, 0,
+						8, 0, 0, 0,
+						0x70, 0x69, 0x70, 0x65,
+						0x77, 0x69, 0x72, 0x65,
+						0x2e, 0x73, 0x65, 0x63,
+						0x2e, 0x61, 0x70, 0x70,
+						0x2d, 0x69, 0x64, 0,
+						0, 0, 0, 0,
+						// String: value = "org.chromium.Chromium"
+						0x16, 0, 0, 0,
+						8, 0, 0, 0,
+						0x6f, 0x72, 0x67, 0x2e,
+						0x63, 0x68, 0x72, 0x6f,
+						0x6d, 0x69, 0x75, 0x6d,
+						0x2e, 0x43, 0x68, 0x72,
+						0x6f, 0x6d, 0x69, 0x75,
+						// String: key = "pipewire.sec.instance-id"
+						0x6d, 0, 0, 0,
+						0x19, 0, 0, 0,
+						8, 0, 0, 0,
+						0x70, 0x69, 0x70, 0x65,
+						0x77, 0x69, 0x72, 0x65,
+						0x2e, 0x73, 0x65, 0x63,
+						0x2e, 0x69, 0x6e, 0x73,
+						0x74, 0x61, 0x6e, 0x63,
+						0x65, 0x2d, 0x69, 0x64,
+						0, 0, 0, 0,
+						0, 0, 0, 0,
+						// String: value = "ebf083d1b175911782d413369b64ce7c"
+						0x21, 0, 0, 0,
+						8, 0, 0, 0,
+						0x65, 0x62, 0x66, 0x30,
+						0x38, 0x33, 0x64, 0x31,
+						0x62, 0x31, 0x37, 0x35,
+						0x39, 0x31, 0x31, 0x37,
+						0x38, 0x32, 0x64, 0x34,
+						0x31, 0x33, 0x33, 0x36,
+						0x39, 0x62, 0x36, 0x34,
+						0x63, 0x65, 0x37, 0x63,
+						0, 0, 0, 0,
+						0, 0, 0, 0,
 						// String: key = "pipewire.access"
 						0x10, 0, 0, 0,
 						8, 0, 0, 0,
@@ -386,29 +430,43 @@ func TestPipeWireOp(t *testing.T) {
 
 	checkOpsBuilder(t, "PipeWire", []opsBuilderTestCase{
 		{"sample", 0xcafe, func(_ *testing.T, sys *I) {
-			sys.PipeWire(m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"))
+			sys.PipeWire(m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+				"org.chromium.Chromium",
+				"ebf083d1b175911782d413369b64ce7c")
 		}, []Op{&pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}}, stub.Expect{}},
 	})
 
 	checkOpIs(t, []opIsTestCase{
 		{"dst differs", &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7d/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, false},
 
 		{"equals", &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, true},
 	})
 
 	checkOpMeta(t, []opMetaTestCase{
 		{"sample", &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, Process, "/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire",
 			`pipewire socket at "/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"`},
 	})