+++ /dev/null
-// -*- mode:C; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "librbd/object_map/RefreshRequest.h"
-#include "cls/lock/cls_lock_client.h"
-#include "common/dout.h"
-#include "common/errno.h"
-#include "librbd/ImageCtx.h"
-#include "librbd/ObjectMap.h"
-#include "librbd/object_map/InvalidateRequest.h"
-#include "librbd/object_map/LockRequest.h"
-#include "librbd/object_map/ResizeRequest.h"
-#include "librbd/Utils.h"
-#include "osdc/Striper.h"
-
-#define dout_subsys ceph_subsys_rbd
-#undef dout_prefix
-#define dout_prefix *_dout << "librbd::object_map::RefreshRequest: "
-
-namespace librbd {
-
-using util::create_context_callback;
-using util::create_rados_callback;
-
-namespace object_map {
-
-template <typename I>
-RefreshRequest<I>::RefreshRequest(I &image_ctx, ceph::BitVector<2> *object_map,
- uint64_t snap_id, Context *on_finish)
- : m_image_ctx(image_ctx), m_object_map(object_map), m_snap_id(snap_id),
- m_on_finish(on_finish), m_object_count(0),
- m_truncate_on_disk_object_map(false) {
-}
-
-template <typename I>
-void RefreshRequest<I>::send() {
- {
- RWLock::RLocker snap_locker(m_image_ctx.snap_lock);
- m_object_count = Striper::get_num_objects(
- m_image_ctx.layout, m_image_ctx.get_image_size(m_snap_id));
- }
-
-
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 20) << this << " " << __func__ << ": "
- << "object_count=" << m_object_count << dendl;
- send_lock();
-}
-
-template <typename I>
-void RefreshRequest<I>::apply() {
- uint64_t num_objs;
- {
- RWLock::RLocker snap_locker(m_image_ctx.snap_lock);
- num_objs = Striper::get_num_objects(
- m_image_ctx.layout, m_image_ctx.get_image_size(m_snap_id));
- }
- assert(m_on_disk_object_map.size() >= num_objs);
-
- *m_object_map = m_on_disk_object_map;
-}
-
-template <typename I>
-void RefreshRequest<I>::send_lock() {
- CephContext *cct = m_image_ctx.cct;
- if (m_object_count > cls::rbd::MAX_OBJECT_MAP_OBJECT_COUNT) {
- send_invalidate_and_close();
- return;
- } else if (m_snap_id != CEPH_NOSNAP) {
- send_load();
- return;
- }
-
- std::string oid(ObjectMap<>::object_map_name(m_image_ctx.id, m_snap_id));
- ldout(cct, 10) << this << " " << __func__ << ": oid=" << oid << dendl;
-
- using klass = RefreshRequest<I>;
- Context *ctx = create_context_callback<
- klass, &klass::handle_lock>(this);
-
- LockRequest<I> *req = LockRequest<I>::create(m_image_ctx, ctx);
- req->send();
-}
-
-template <typename I>
-Context *RefreshRequest<I>::handle_lock(int *ret_val) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << dendl;
-
- assert(*ret_val == 0);
- send_load();
- return nullptr;
-}
-
-template <typename I>
-void RefreshRequest<I>::send_load() {
- CephContext *cct = m_image_ctx.cct;
- std::string oid(ObjectMap<>::object_map_name(m_image_ctx.id, m_snap_id));
- ldout(cct, 10) << this << " " << __func__ << ": oid=" << oid << dendl;
-
- librados::ObjectReadOperation op;
- cls_client::object_map_load_start(&op);
-
- using klass = RefreshRequest<I>;
- m_out_bl.clear();
- librados::AioCompletion *rados_completion =
- create_rados_callback<klass, &klass::handle_load>(this);
- int r = m_image_ctx.md_ctx.aio_operate(oid, rados_completion, &op, &m_out_bl);
- assert(r == 0);
- rados_completion->release();
-}
-
-template <typename I>
-Context *RefreshRequest<I>::handle_load(int *ret_val) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << ": r=" << *ret_val << dendl;
-
- if (*ret_val == 0) {
- bufferlist::iterator bl_it = m_out_bl.begin();
- *ret_val = cls_client::object_map_load_finish(&bl_it,
- &m_on_disk_object_map);
- }
-
- std::string oid(ObjectMap<>::object_map_name(m_image_ctx.id, m_snap_id));
- if (*ret_val == -EINVAL) {
- // object map is corrupt on-disk -- clear it and properly size it
- // so future IO can keep the object map in sync
- lderr(cct) << "object map corrupt on-disk: " << oid << dendl;
- m_truncate_on_disk_object_map = true;
- send_resize_invalidate();
- return nullptr;
- } else if (*ret_val < 0) {
- lderr(cct) << "failed to load object map: " << oid << dendl;
- send_invalidate();
- return nullptr;
- }
-
- if (m_on_disk_object_map.size() < m_object_count) {
- lderr(cct) << "object map smaller than current object count: "
- << m_on_disk_object_map.size() << " != "
- << m_object_count << dendl;
- send_resize_invalidate();
- return nullptr;
- }
-
- ldout(cct, 20) << "refreshed object map: num_objs="
- << m_on_disk_object_map.size() << dendl;
- if (m_on_disk_object_map.size() > m_object_count) {
- // resize op might have been interrupted
- ldout(cct, 1) << "object map larger than current object count: "
- << m_on_disk_object_map.size() << " != "
- << m_object_count << dendl;
- }
-
- apply();
- return m_on_finish;
-}
-
-template <typename I>
-void RefreshRequest<I>::send_invalidate() {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << dendl;
-
- m_on_disk_object_map.clear();
- object_map::ResizeRequest::resize(&m_on_disk_object_map, m_object_count,
- OBJECT_EXISTS);
-
- using klass = RefreshRequest<I>;
- Context *ctx = create_context_callback<
- klass, &klass::handle_invalidate>(this);
- InvalidateRequest<I> *req = InvalidateRequest<I>::create(
- m_image_ctx, m_snap_id, false, ctx);
-
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
- req->send();
-}
-
-template <typename I>
-Context *RefreshRequest<I>::handle_invalidate(int *ret_val) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << ": r=" << *ret_val << dendl;
-
- assert(*ret_val == 0);
- apply();
- return m_on_finish;
-}
-
-template <typename I>
-void RefreshRequest<I>::send_resize_invalidate() {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << dendl;
-
- m_on_disk_object_map.clear();
- object_map::ResizeRequest::resize(&m_on_disk_object_map, m_object_count,
- OBJECT_EXISTS);
-
- using klass = RefreshRequest<I>;
- Context *ctx = create_context_callback<
- klass, &klass::handle_resize_invalidate>(this);
- InvalidateRequest<I> *req = InvalidateRequest<I>::create(
- m_image_ctx, m_snap_id, false, ctx);
-
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
- req->send();
-}
-
-template <typename I>
-Context *RefreshRequest<I>::handle_resize_invalidate(int *ret_val) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << ": r=" << *ret_val << dendl;
-
- assert(*ret_val == 0);
- send_resize();
- return nullptr;
-}
-
-template <typename I>
-void RefreshRequest<I>::send_resize() {
- CephContext *cct = m_image_ctx.cct;
- std::string oid(ObjectMap<>::object_map_name(m_image_ctx.id, m_snap_id));
- ldout(cct, 10) << this << " " << __func__ << ": oid=" << oid << dendl;
-
- librados::ObjectWriteOperation op;
- if (m_snap_id == CEPH_NOSNAP) {
- rados::cls::lock::assert_locked(&op, RBD_LOCK_NAME, LOCK_EXCLUSIVE, "", "");
- }
- if (m_truncate_on_disk_object_map) {
- op.truncate(0);
- }
- cls_client::object_map_resize(&op, m_object_count, OBJECT_NONEXISTENT);
-
- using klass = RefreshRequest<I>;
- librados::AioCompletion *rados_completion =
- create_rados_callback<klass, &klass::handle_resize>(this);
- int r = m_image_ctx.md_ctx.aio_operate(oid, rados_completion, &op);
- assert(r == 0);
- rados_completion->release();
-}
-
-template <typename I>
-Context *RefreshRequest<I>::handle_resize(int *ret_val) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << ": r=" << *ret_val << dendl;
-
- if (*ret_val < 0) {
- lderr(cct) << "failed to adjust object map size: " << cpp_strerror(*ret_val)
- << dendl;
- *ret_val = 0;
- }
- apply();
- return m_on_finish;
-}
-
-template <typename I>
-void RefreshRequest<I>::send_invalidate_and_close() {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << dendl;
-
- using klass = RefreshRequest<I>;
- Context *ctx = create_context_callback<
- klass, &klass::handle_invalidate_and_close>(this);
- InvalidateRequest<I> *req = InvalidateRequest<I>::create(
- m_image_ctx, m_snap_id, false, ctx);
-
- lderr(cct) << "object map too large: " << m_object_count << dendl;
- RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
- RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
- req->send();
-}
-
-template <typename I>
-Context *RefreshRequest<I>::handle_invalidate_and_close(int *ret_val) {
- CephContext *cct = m_image_ctx.cct;
- ldout(cct, 10) << this << " " << __func__ << ": r=" << *ret_val << dendl;
-
- assert(*ret_val == 0);
-
- *ret_val = -EFBIG;
- m_object_map->clear();
- return m_on_finish;
-}
-
-} // namespace object_map
-} // namespace librbd
-
-template class librbd::object_map::RefreshRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff