| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "slices" |
| 9 | |
| 10 | "github.com/carlosframework/platform/internal/activator" |
| 11 | "github.com/carlosframework/platform/internal/cgroup" |
| 12 | "github.com/carlosframework/platform/internal/hostbox" |
| 13 | "github.com/carlosframework/platform/internal/hostwrite" |
| 14 | "github.com/carlosframework/platform/internal/instancectl" |
| 15 | "github.com/carlosframework/platform/internal/provision" |
| 16 | "github.com/carlosframework/platform/internal/registry" |
| 17 | "github.com/carlosframework/platform/internal/release" |
| 18 | ) |
| 19 | |
| 20 | func (h *ClaimLaunchRoot) boundInputs(ctx context.Context, rt registry.Route) (*hostbox.UnitLaunchInputs, error) { |
| 21 | if h.unitBindings == nil || h.unitProgram == nil { |
| 22 | return nil, os.ErrPermission |
| 23 | } |
| 24 | var result *hostbox.UnitLaunchInputs |
| 25 | err := func() error { |
| 26 | b, err := h.unitBindings.read(rt.Host) |
| 27 | if errors.Is(err, os.ErrNotExist) { |
| 28 | if _, e := h.unitBindings.canonical(ctx, rt.Host); e == nil { |
| 29 | return os.ErrPermission |
| 30 | } |
| 31 | if rt.Unit != "" || rt.Backing != "" || rt.Tunnel != "" { |
| 32 | return hostbox.ErrUnsupported |
| 33 | } |
| 34 | return nil |
| 35 | } |
| 36 | if err != nil { |
| 37 | return err |
| 38 | } |
| 39 | b, err = h.unitBindings.check(ctx, rt.Host, &rt) |
| 40 | if err != nil { |
| 41 | return err |
| 42 | } |
| 43 | p, err := h.unitProgram(b.Shape) |
| 44 | if err != nil { |
| 45 | return err |
| 46 | } |
| 47 | result = &hostbox.UnitLaunchInputs{Unit: b.Shape.Unit, Socket: b.Shape.Socket, Addr: b.Shape.Addr, DBPath: b.Shape.DBPath, Program: b.Shape.Program, Args: append([]string(nil), p.Args...), Env: append([]string(nil), p.Env...)} |
| 48 | return nil |
| 49 | }() |
| 50 | return result, err |
| 51 | } |
| 52 | |
| 53 | type claimUnitInputReader func(context.Context, registry.Route) (*hostbox.UnitLaunchInputs, error) |
| 54 | |
| 55 | func claimBoundSnapshot(ctx context.Context, backend *activator.ExecBackend, rt registry.Route, read claimUnitInputReader) (ClaimServingLaunch, error) { |
| 56 | var out ClaimServingLaunch |
| 57 | unit, err := read(ctx, rt) |
| 58 | if err != nil { |
| 59 | return out, err |
| 60 | } |
| 61 | if unit == nil { |
| 62 | return out, hostbox.ErrUnsupported |
| 63 | } |
| 64 | if err = validateClaimUnitInputs(rt.Host, unit); err != nil { |
| 65 | return out, err |
| 66 | } |
| 67 | id, err := release.ResolveLive(backend.OptDir, rt.Host) |
| 68 | if err != nil { |
| 69 | return out, err |
| 70 | } |
| 71 | if id.Version == "" || !claimHexDigest(id.Digest) { |
| 72 | return out, hostbox.ErrChanged |
| 73 | } |
| 74 | out = ClaimServingLaunch{Unit: unit, Identity: hostwrite.Identity{Config: unit.Program, Release: id.Digest}, Executable: release.LiveLink(backend.OptDir, rt.Host), ExecutableSHA256: id.Digest, Args: unit.Args, Env: unit.Env, Version: id.Version, Staged: id, Limit: cgroup.TierDefault, Roles: []string{"main"}} |
| 75 | return out, nil |
| 76 | } |
| 77 | |
| 78 | func validateClaimUnitInputs(host string, in *hostbox.UnitLaunchInputs) error { |
| 79 | if in == nil || !claimHexDigest(in.Program) || !provision.ValidHostShape(host) || filepath.Dir(in.DBPath) != provision.InstanceDir("/data", host) { |
| 80 | return hostbox.ErrRoleLaunchShape |
| 81 | } |
| 82 | if !instancectl.ValidBoundClaimUnit(in.Unit) || (in.Socket == "") == (in.Addr == "") || filepath.Clean(in.DBPath) != in.DBPath { |
| 83 | return hostbox.ErrRoleLaunchShape |
| 84 | } |
| 85 | if in.Socket != "" && in.Socket != provision.NestedSocket(host) && !claimFlatSocket(claimUnitShape{Socket: in.Socket}) { |
| 86 | return hostbox.ErrRoleLaunchShape |
| 87 | } |
| 88 | return nil |
| 89 | } |
| 90 | |
| 91 | func claimBoundInputMatch(host string, in ClaimLaunchInputs) error { |
| 92 | if err := validateClaimUnitInputs(host, in.Unit); err != nil { |
| 93 | return err |
| 94 | } |
| 95 | if in.DBPath != in.Unit.DBPath || in.Identity.Config != in.Unit.Program || !slices.Equal(in.Args, in.Unit.Args) || !slices.Equal(in.Env, in.Unit.Env) { |
| 96 | return hostbox.ErrRoleLaunchShape |
| 97 | } |
| 98 | return nil |
| 99 | } |
| 100 | |
amadan