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all: use immutable node view in read path

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This commit changes most of our (*)types.Node to
types.NodeView, which is a readonly version of the
underlying node ensuring that there is no mutations
happening in the read path.

Based on the migration, there didnt seem to be any, but the
idea here is to prevent it in the future and simplify other
new implementations.

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby
2025-07-05 23:31:13 +02:00
committed by Kristoffer Dalby
parent 5ba7120418
commit 73023c2ec3
24 changed files with 866 additions and 196 deletions
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21
hscontrol/policy/policy_test.go
View File

@@ -815,11 +815,11 @@ func TestReduceFilterRules(t *testing.T) {
t.Run(fmt.Sprintf("%s-index%d", tt.name, idx), func(t *testing.T) {
var pm PolicyManager
var err error
pm, err = pmf(users, append(tt.peers, tt.node))
pm, err = pmf(users, append(tt.peers, tt.node).ViewSlice())
require.NoError(t, err)
got, _ := pm.Filter()
t.Logf("full filter:\n%s", must.Get(json.MarshalIndent(got, "", " ")))
got = ReduceFilterRules(tt.node, got)
got = ReduceFilterRules(tt.node.View(), got)
if diff := cmp.Diff(tt.want, got); diff != "" {
log.Trace().Interface("got", got).Msg("result")
@@ -1576,11 +1576,16 @@ func TestReduceNodes(t *testing.T) {
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
matchers := matcher.MatchesFromFilterRules(tt.args.rules)
got := ReduceNodes(
tt.args.node,
tt.args.nodes,
gotViews := ReduceNodes(
tt.args.node.View(),
tt.args.nodes.ViewSlice(),
matchers,
)
// Convert views back to nodes for comparison in tests
var got types.Nodes
for _, v := range gotViews.All() {
got = append(got, v.AsStruct())
}
if diff := cmp.Diff(tt.want, got, util.Comparers...); diff != "" {
t.Errorf("FilterNodesByACL() unexpected result (-want +got):\n%s", diff)
}
@@ -1949,7 +1954,7 @@ func TestSSHPolicyRules(t *testing.T) {
t.Run(fmt.Sprintf("%s-index%d", tt.name, idx), func(t *testing.T) {
var pm PolicyManager
var err error
pm, err = pmf(users, append(tt.peers, &tt.targetNode))
pm, err = pmf(users, append(tt.peers, &tt.targetNode).ViewSlice())
if tt.expectErr {
require.Error(t, err)
@@ -1959,7 +1964,7 @@ func TestSSHPolicyRules(t *testing.T) {
require.NoError(t, err)
got, err := pm.SSHPolicy(&tt.targetNode)
got, err := pm.SSHPolicy(tt.targetNode.View())
require.NoError(t, err)
if diff := cmp.Diff(tt.wantSSH, got); diff != "" {
@@ -2426,7 +2431,7 @@ func TestReduceRoutes(t *testing.T) {
t.Run(tt.name, func(t *testing.T) {
matchers := matcher.MatchesFromFilterRules(tt.args.rules)
got := ReduceRoutes(
tt.args.node,
tt.args.node.View(),
tt.args.routes,
matchers,
)