New API: luks_uuid

Return the UUID of a LUKS device.

(cherry picked from commit 206ce8bbf1)

daemon/luks.c

@@ -292,3 +292,28 @@ do_luks_kill_slot (const char *device, const char *key, int keyslot)
 
   return 0;
 }
+
+char *
+do_luks_uuid (const char *device)
+{
+  const char *argv[MAX_ARGS];
+  size_t i = 0;
+
+  ADD_ARG (argv, i, "cryptsetup");
+  ADD_ARG (argv, i, "luksUUID");
+  ADD_ARG (argv, i, device);
+  ADD_ARG (argv, i, NULL);
+
+  char *out = NULL;
+  CLEANUP_FREE char *err = NULL;
+  int r = commandv (&out, &err, (const char * const *) argv);
+
+  if (r == -1) {
+    reply_with_error ("%s", err);
+    return NULL;
+  }
+
+  trim (out);
+
+  return out;
+}

generator/actions_core.ml

@@ -9728,4 +9728,12 @@ it is useful when you have added a new device or deleted an
 existing device (such as when the C<guestfs_luks_open> API
 is used)." };
 
+  { defaults with
+    name = "luks_uuid"; added = (1, 41, 9);
+    style = RString (RPlainString, "uuid"), [String (Device, "device")], [];
+    optional = Some "luks";
+    shortdesc = "get the UUID of a LUKS device";
+    longdesc = "\
+This returns the UUID of the LUKS device C<device>." };
+
 ]

generator/proc_nr.ml

@@ -514,6 +514,7 @@ let proc_nr = [
 504, "part_get_gpt_attributes";
 505, "f2fs_expand";
 506, "lvm_scan";
+507, "luks_uuid";
 ]
 
 (* End of list.  If adding a new entry, add it at the end of the list

lib/MAX_PROC_NR

@@ -1 +1 @@
-506
+507