+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "librbd/operation/RenameRequest.h"
-#include "common/dout.h"
-#include "common/errno.h"
-#include "include/rados/librados.hpp"
-#include "librbd/ImageCtx.h"
-#include "librbd/internal.h"
-#include "librbd/Utils.h"
-
-#define dout_subsys ceph_subsys_rbd
-#undef dout_prefix
-#define dout_prefix *_dout << "librbd::operation::RenameRequest: "
-
-namespace librbd {
-namespace operation {
-
-namespace {
-
-template <typename I>
-std::ostream& operator<<(std::ostream& os,
- const typename RenameRequest<I>::State& state) {
- switch(state) {
- case RenameRequest<I>::STATE_READ_SOURCE_HEADER:
- os << "READ_SOURCE_HEADER";
- break;
- case RenameRequest<I>::STATE_WRITE_DEST_HEADER:
- os << "WRITE_DEST_HEADER";
- break;
- case RenameRequest<I>::STATE_UPDATE_DIRECTORY:
- os << "UPDATE_DIRECTORY";
- break;
- case RenameRequest<I>::STATE_REMOVE_SOURCE_HEADER:
- os << "REMOVE_SOURCE_HEADER";
- break;
- default:
- os << "UNKNOWN (" << static_cast<uint32_t>(state) << ")";
- break;
- }
- return os;
-}
-
-} // anonymous namespace
-
-template <typename I>
-RenameRequest<I>::RenameRequest(I &image_ctx, Context *on_finish,
- const std::string &dest_name)
- : Request<I>(image_ctx, on_finish), m_dest_name(dest_name),
- m_source_oid(image_ctx.old_format ? util::old_header_name(image_ctx.name) :
- util::id_obj_name(image_ctx.name)),
- m_dest_oid(image_ctx.old_format ? util::old_header_name(dest_name) :
- util::id_obj_name(dest_name)) {
-}
-
-template <typename I>
-void RenameRequest<I>::send_op() {
- send_read_source_header();
-}
-
-template <typename I>
-bool RenameRequest<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;
- r = filter_state_return_code(r);
- if (r < 0) {
- if (r == -EEXIST) {
- ldout(cct, 1) << "image already exists" << dendl;
- } else {
- lderr(cct) << "encountered error: " << cpp_strerror(r) << dendl;
- }
- return true;
- }
-
- if (m_state == STATE_REMOVE_SOURCE_HEADER) {
- apply();
- return true;
- }
-
- RWLock::RLocker owner_lock(image_ctx.owner_lock);
- switch (m_state) {
- case STATE_READ_SOURCE_HEADER:
- send_write_destination_header();
- break;
- case STATE_WRITE_DEST_HEADER:
- send_update_directory();
- break;
- case STATE_UPDATE_DIRECTORY:
- send_remove_source_header();
- break;
- default:
- assert(false);
- break;
- }
- return false;
-}
-
-template <typename I>
-int RenameRequest<I>::filter_state_return_code(int r) {
- I &image_ctx = this->m_image_ctx;
- CephContext *cct = image_ctx.cct;
-
- if (m_state == STATE_REMOVE_SOURCE_HEADER && r < 0) {
- if (r != -ENOENT) {
- lderr(cct) << "warning: couldn't remove old source object ("
- << m_source_oid << ")" << dendl;
- }
- return 0;
- }
- return r;
-}
-
-template <typename I>
-void RenameRequest<I>::send_read_source_header() {
- I &image_ctx = this->m_image_ctx;
- CephContext *cct = image_ctx.cct;
- ldout(cct, 5) << this << " " << __func__ << dendl;
- m_state = STATE_READ_SOURCE_HEADER;
-
- librados::ObjectReadOperation op;
- op.read(0, 0, NULL, NULL);
-
- // TODO: old code read omap values but there are no omap values on the
- // old format header nor the new format id object
- librados::AioCompletion *rados_completion = this->create_callback_completion();
- int r = image_ctx.md_ctx.aio_operate(m_source_oid, rados_completion, &op,
- &m_header_bl);
- assert(r == 0);
- rados_completion->release();
-}
-
-template <typename I>
-void RenameRequest<I>::send_write_destination_header() {
- I &image_ctx = this->m_image_ctx;
- CephContext *cct = image_ctx.cct;
- ldout(cct, 5) << this << " " << __func__ << dendl;
- m_state = STATE_WRITE_DEST_HEADER;
-
- librados::ObjectWriteOperation op;
- op.create(true);
- op.write_full(m_header_bl);
-
- librados::AioCompletion *rados_completion = this->create_callback_completion();
- int r = image_ctx.md_ctx.aio_operate(m_dest_oid, rados_completion, &op);
- assert(r == 0);
- rados_completion->release();
-}
-
-template <typename I>
-void RenameRequest<I>::send_update_directory() {
- I &image_ctx = this->m_image_ctx;
- CephContext *cct = image_ctx.cct;
- ldout(cct, 5) << this << " " << __func__ << dendl;
- m_state = STATE_UPDATE_DIRECTORY;
-
- librados::ObjectWriteOperation op;
- if (image_ctx.old_format) {
- bufferlist cmd_bl;
- bufferlist empty_bl;
- ::encode(static_cast<__u8>(CEPH_OSD_TMAP_SET), cmd_bl);
- ::encode(m_dest_name, cmd_bl);
- ::encode(empty_bl, cmd_bl);
- ::encode(static_cast<__u8>(CEPH_OSD_TMAP_RM), cmd_bl);
- ::encode(image_ctx.name, cmd_bl);
- op.tmap_update(cmd_bl);
- } else {
- cls_client::dir_rename_image(&op, image_ctx.name, m_dest_name,
- image_ctx.id);
- }
-
- librados::AioCompletion *rados_completion = this->create_callback_completion();
- int r = image_ctx.md_ctx.aio_operate(RBD_DIRECTORY, rados_completion, &op);
- assert(r == 0);
- rados_completion->release();
-}
-
-template <typename I>
-void RenameRequest<I>::send_remove_source_header() {
- I &image_ctx = this->m_image_ctx;
- CephContext *cct = image_ctx.cct;
- ldout(cct, 5) << this << " " << __func__ << dendl;
- m_state = STATE_REMOVE_SOURCE_HEADER;
-
- librados::ObjectWriteOperation op;
- op.remove();
-
- librados::AioCompletion *rados_completion = this->create_callback_completion();
- int r = image_ctx.md_ctx.aio_operate(m_source_oid, rados_completion, &op);
- assert(r == 0);
- rados_completion->release();
-}
-
-template <typename I>
-void RenameRequest<I>::apply() {
- I &image_ctx = this->m_image_ctx;
- image_ctx.set_image_name(m_dest_name);
-}
-
-} // namespace operation
-} // namespace librbd
-
-template class librbd::operation::RenameRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff