repart: Allow keeping luks2 volumes opened

src/repart/repart.c

@@ -4920,6 +4920,7 @@ typedef struct DecryptedPartitionTarget {
         int fd;
         char *dm_name;
         char *volume;
+        bool keep;
         struct crypt_device *device;
 } DecryptedPartitionTarget;
 
@@ -4932,11 +4933,14 @@ static DecryptedPartitionTarget* decrypted_partition_target_free(DecryptedPartit
 
         safe_close(t->fd);
 
-        /* udev or so might access out block device in the background while we are done. Let's hence
-         * force detach the volume. We sync'ed before, hence this should be safe. */
-        r = sym_crypt_deactivate_by_name(t->device, t->dm_name, CRYPT_DEACTIVATE_FORCE);
-        if (r < 0)
-                log_warning_errno(r, "Failed to deactivate LUKS device, ignoring: %m");
+        if (!t->keep) {
+                /* udev or so might access our block device in the background while we are done. Let's hence
+                 * force detach the volume. We sync'ed before, hence this should be safe. */
+                r = sym_crypt_deactivate_by_name(t->device, t->dm_name, CRYPT_DEACTIVATE_FORCE);
+                if (r < 0)
+                        log_warning_errno(r, "Failed to deactivate LUKS device, ignoring: %m");
+        } else
+                log_debug("Keeping encrypted device '%s' open.", t->dm_name);
 
         sym_crypt_free(t->device);
         free(t->dm_name);