summaryrefslogtreecommitdiffstats
path: root/src/librbd/operation/SnapshotUnprotectRequest.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:54:28 +0000
commite6918187568dbd01842d8d1d2c808ce16a894239 (patch)
tree64f88b554b444a49f656b6c656111a145cbbaa28 /src/librbd/operation/SnapshotUnprotectRequest.h
parentInitial commit. (diff)
downloadceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz
ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/librbd/operation/SnapshotUnprotectRequest.h')
-rw-r--r--src/librbd/operation/SnapshotUnprotectRequest.h94
1 files changed, 94 insertions, 0 deletions
diff --git a/src/librbd/operation/SnapshotUnprotectRequest.h b/src/librbd/operation/SnapshotUnprotectRequest.h
new file mode 100644
index 000000000..19cc6d32b
--- /dev/null
+++ b/src/librbd/operation/SnapshotUnprotectRequest.h
@@ -0,0 +1,94 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_OPERATION_SNAPSHOT_UNPROTECT_REQUEST_H
+#define CEPH_LIBRBD_OPERATION_SNAPSHOT_UNPROTECT_REQUEST_H
+
+#include "librbd/operation/Request.h"
+#include <string>
+
+class Context;
+
+namespace librbd {
+
+class ImageCtx;
+
+namespace operation {
+
+template <typename ImageCtxT = ImageCtx>
+class SnapshotUnprotectRequest : public Request<ImageCtxT> {
+public:
+ /**
+ * Snap Unprotect goes through the following state machine:
+ *
+ * @verbatim
+ *
+ * <start>
+ * |
+ * v
+ * STATE_UNPROTECT_SNAP_START
+ * |
+ * v
+ * STATE_SCAN_POOL_CHILDREN * * * * > STATE_UNPROTECT_SNAP_ROLLBACK
+ * | |
+ * v |
+ * STATE_UNPROTECT_SNAP_FINISH |
+ * | |
+ * v |
+ * <finish> <----------------------------/
+ *
+ * @endverbatim
+ *
+ * If the unprotect operation needs to abort, the error path is followed
+ * to rollback the unprotect in-progress status on the image.
+ */
+ enum State {
+ STATE_UNPROTECT_SNAP_START,
+ STATE_SCAN_POOL_CHILDREN,
+ STATE_UNPROTECT_SNAP_FINISH,
+ STATE_UNPROTECT_SNAP_ROLLBACK
+ };
+
+ SnapshotUnprotectRequest(ImageCtxT &image_ctx, Context *on_finish,
+ const cls::rbd::SnapshotNamespace &snap_namespace,
+ const std::string &snap_name);
+
+protected:
+ void send_op() override;
+ bool should_complete(int r) override;
+
+ int filter_return_code(int r) const override {
+ if (m_ret_val < 0) {
+ return m_ret_val;
+ }
+ return 0;
+ }
+
+ journal::Event create_event(uint64_t op_tid) const override {
+ return journal::SnapUnprotectEvent(op_tid, m_snap_namespace, m_snap_name);
+ }
+
+private:
+ cls::rbd::SnapshotNamespace m_snap_namespace;
+ std::string m_snap_name;
+ State m_state;
+
+ int m_ret_val;
+ uint64_t m_snap_id;
+
+ bool should_complete_error();
+
+ void send_unprotect_snap_start();
+ void send_scan_pool_children();
+ void send_unprotect_snap_finish();
+ void send_unprotect_snap_rollback();
+
+ int verify_and_send_unprotect_snap_start();
+};
+
+} // namespace operation
+} // namespace librbd
+
+extern template class librbd::operation::SnapshotUnprotectRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_UNPROTECT_REQUEST_H