btrfs-progs: send: check if parent or clone sources are read-only

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/cmds-send.c b/cmds-send.c
index 302f5a8..85461d5 100644 (file)
--- a/cmds-send.c
+++ b/cmds-send.c
@@ -504,6 +504,18 @@ int cmd_send(int argc, char **argv)
                                                "root_id for %s\n", subvol);
                                goto out;
                        }
+
+                       ret = is_subvol_ro(&send, subvol);
+                       if (ret < 0)
+                               goto out;
+                       if (!ret) {
+                               ret = -EINVAL;
+                               fprintf(stderr,
+                               "ERROR: cloned subvol %s is not read-only.\n",
+                                       subvol);
+                               goto out;
+                       }
+
                        add_clone_source(&send, root_id);
                        subvol_uuid_search_finit(&send.sus);
                        free(subvol);
@@ -532,6 +544,18 @@ int cmd_send(int argc, char **argv)
                                                "%s\n", optarg, strerror(-ret));
                                goto out;
                        }
+
+                       ret = is_subvol_ro(&send, snapshot_parent);
+                       if (ret < 0)
+                               goto out;
+                       if (!ret) {
+                               ret = -EINVAL;
+                               fprintf(stderr,
+                                       "ERROR: parent %s is not read-only.\n",
+                                       snapshot_parent);
+                               goto out;
+                       }
+
                        full_send = 0;
                        break;
                case 'i':