restic: extract Node filesystem code to fs package

internal/fs/node_aix.go

@@ -0,0 +1,51 @@
+//go:build aix
+// +build aix
+
+package fs
+
+import (
+	"os"
+	"syscall"
+
+	"github.com/restic/restic/internal/restic"
+)
+
+func nodeRestoreSymlinkTimestamps(_ string, _ [2]syscall.Timespec) error {
+	return nil
+}
+
+// AIX has a funny timespec type in syscall, with 32-bit nanoseconds.
+// golang.org/x/sys/unix handles this cleanly, but we're stuck with syscall
+// because os.Stat returns a syscall type in its os.FileInfo.Sys().
+func toTimespec(t syscall.StTimespec_t) syscall.Timespec {
+	return syscall.Timespec{Sec: t.Sec, Nsec: int64(t.Nsec)}
+}
+
+func (s statT) atim() syscall.Timespec { return toTimespec(s.Atim) }
+func (s statT) mtim() syscall.Timespec { return toTimespec(s.Mtim) }
+func (s statT) ctim() syscall.Timespec { return toTimespec(s.Ctim) }
+
+// nodeRestoreExtendedAttributes is a no-op on AIX.
+func nodeRestoreExtendedAttributes(_ *restic.Node, _ string) error {
+	return nil
+}
+
+// nodeFillExtendedAttributes is a no-op on AIX.
+func nodeFillExtendedAttributes(_ *restic.Node, _ string, _ bool) error {
+	return nil
+}
+
+// IsListxattrPermissionError is a no-op on AIX.
+func IsListxattrPermissionError(_ error) bool {
+	return false
+}
+
+// nodeRestoreGenericAttributes is no-op on AIX.
+func nodeRestoreGenericAttributes(node *restic.Node, _ string, warn func(msg string)) error {
+	return restic.HandleAllUnknownGenericAttributesFound(node.GenericAttributes, warn)
+}
+
+// nodeFillGenericAttributes is a no-op on AIX.
+func nodeFillGenericAttributes(_ *restic.Node, _ string, _ os.FileInfo, _ *statT) (allowExtended bool, err error) {
+	return true, nil
+}