+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "librbd/operation/SnapshotProtectRequest.h"
-#include "common/dout.h"
-#include "common/errno.h"
-#include "librbd/ImageCtx.h"
-
-#define dout_subsys ceph_subsys_rbd
-#undef dout_prefix
-#define dout_prefix *_dout << "librbd::SnapshotProtectRequest: "
-
-namespace librbd {
-namespace operation {
-
-namespace {
-
-template <typename I>
-std::ostream& operator<<(std::ostream& os,
- const typename SnapshotProtectRequest<I>::State& state) {
- switch(state) {
- case SnapshotProtectRequest<I>::STATE_PROTECT_SNAP:
- os << "PROTECT_SNAP";
- break;
- }
- return os;
-}
-
-} // anonymous namespace
-
-template <typename I>
-SnapshotProtectRequest<I>::SnapshotProtectRequest(I &image_ctx,
- Context *on_finish,
- const cls::rbd::SnapshotNamespace &snap_namespace,
- const std::string &snap_name)
- : Request<I>(image_ctx, on_finish), m_snap_namespace(snap_namespace), m_snap_name(snap_name) {
-}
-
-template <typename I>
-void SnapshotProtectRequest<I>::send_op() {
- send_protect_snap();
-}
-
-template <typename I>
-bool SnapshotProtectRequest<I>::should_complete(int r) {
- I &image_ctx = this->m_image_ctx;
- CephContext *cct = image_ctx.cct;
- ldout(cct, 5) << this << " " << __func__ << ": state=" << m_state << ", "
- << "r=" << r << dendl;
- if (r < 0) {
- if (r == -EBUSY) {
- ldout(cct, 1) << "snapshot is already protected" << dendl;
- } else {
- lderr(cct) << "encountered error: " << cpp_strerror(r) << dendl;
- }
- }
- return true;
-}
-
-template <typename I>
-void SnapshotProtectRequest<I>::send_protect_snap() {
- I &image_ctx = this->m_image_ctx;
- assert(image_ctx.owner_lock.is_locked());
-
- CephContext *cct = image_ctx.cct;
- ldout(cct, 5) << this << " " << __func__ << dendl;
-
- m_state = STATE_PROTECT_SNAP;
-
- int r = verify_and_send_protect_snap();
- if (r < 0) {
- this->async_complete(r);
- return;
- }
-}
-
-template <typename I>
-int SnapshotProtectRequest<I>::verify_and_send_protect_snap() {
- I &image_ctx = this->m_image_ctx;
- RWLock::RLocker md_locker(image_ctx.md_lock);
- RWLock::RLocker snap_locker(image_ctx.snap_lock);
-
- CephContext *cct = image_ctx.cct;
- if ((image_ctx.features & RBD_FEATURE_LAYERING) == 0) {
- lderr(cct) << "image must support layering" << dendl;
- return -ENOSYS;
- }
-
- uint64_t snap_id = image_ctx.get_snap_id(m_snap_namespace, m_snap_name);
- if (snap_id == CEPH_NOSNAP) {
- return -ENOENT;
- }
-
- bool is_protected;
- int r = image_ctx.is_snap_protected(snap_id, &is_protected);
- if (r < 0) {
- return r;
- }
-
- if (is_protected) {
- return -EBUSY;
- }
-
- librados::ObjectWriteOperation op;
- cls_client::set_protection_status(&op, snap_id,
- RBD_PROTECTION_STATUS_PROTECTED);
-
- librados::AioCompletion *rados_completion =
- this->create_callback_completion();
- r = image_ctx.md_ctx.aio_operate(image_ctx.header_oid, rados_completion,
- &op);
- assert(r == 0);
- rados_completion->release();
- return 0;
-}
-
-} // namespace operation
-} // namespace librbd
-
-template class librbd::operation::SnapshotProtectRequest<librbd::ImageCtx>;