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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "librbd/operation/RebuildObjectMapRequest.h"
#include "common/dout.h"
#include "common/errno.h"
#include "osdc/Striper.h"
#include "librbd/AsyncObjectThrottle.h"
#include "librbd/ExclusiveLock.h"
#include "librbd/ImageCtx.h"
#include "librbd/internal.h"
#include "librbd/ObjectMap.h"
#include "librbd/operation/ResizeRequest.h"
#include "librbd/operation/TrimRequest.h"
#include "librbd/operation/ObjectMapIterate.h"
#include "librbd/Utils.h"
#include <boost/lambda/bind.hpp>
#include <boost/lambda/construct.hpp>
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::RebuildObjectMapRequest: "
namespace librbd {
namespace operation {
template <typename I>
void RebuildObjectMapRequest<I>::send() {
send_resize_object_map();
}
template <typename I>
bool RebuildObjectMapRequest<I>::should_complete(int r) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 5) << this << " should_complete: " << " r=" << r << dendl;
RWLock::RLocker owner_lock(m_image_ctx.owner_lock);
switch (m_state) {
case STATE_RESIZE_OBJECT_MAP:
ldout(cct, 5) << "RESIZE_OBJECT_MAP" << dendl;
if (r == -ESTALE && !m_attempted_trim) {
// objects are still flagged as in-use -- delete them
m_attempted_trim = true;
send_trim_image();
return false;
} else if (r == 0) {
send_verify_objects();
}
break;
case STATE_TRIM_IMAGE:
ldout(cct, 5) << "TRIM_IMAGE" << dendl;
if (r == 0) {
send_resize_object_map();
}
break;
case STATE_VERIFY_OBJECTS:
ldout(cct, 5) << "VERIFY_OBJECTS" << dendl;
if (r == 0) {
send_save_object_map();
}
break;
case STATE_SAVE_OBJECT_MAP:
ldout(cct, 5) << "SAVE_OBJECT_MAP" << dendl;
if (r == 0) {
send_update_header();
}
break;
case STATE_UPDATE_HEADER:
ldout(cct, 5) << "UPDATE_HEADER" << dendl;
if (r == 0) {
return true;
}
break;
default:
ceph_abort();
break;
}
if (r == -ERESTART) {
ldout(cct, 5) << "rebuild object map operation interrupted" << dendl;
return true;
} else if (r < 0) {
lderr(cct) << "rebuild object map encountered an error: " << cpp_strerror(r)
<< dendl;
return true;
}
return false;
}
template <typename I>
void RebuildObjectMapRequest<I>::send_resize_object_map() {
ceph_assert(m_image_ctx.owner_lock.is_locked());
CephContext *cct = m_image_ctx.cct;
m_image_ctx.snap_lock.get_read();
ceph_assert(m_image_ctx.object_map != nullptr);
uint64_t size = get_image_size();
uint64_t num_objects = Striper::get_num_objects(m_image_ctx.layout, size);
if (m_image_ctx.object_map->size() == num_objects) {
m_image_ctx.snap_lock.put_read();
send_verify_objects();
return;
}
ldout(cct, 5) << this << " send_resize_object_map" << dendl;
m_state = STATE_RESIZE_OBJECT_MAP;
// should have been canceled prior to releasing lock
ceph_assert(m_image_ctx.exclusive_lock == nullptr ||
m_image_ctx.exclusive_lock->is_lock_owner());
m_image_ctx.object_map->aio_resize(size, OBJECT_NONEXISTENT,
this->create_callback_context());
m_image_ctx.snap_lock.put_read();
}
template <typename I>
void RebuildObjectMapRequest<I>::send_trim_image() {
CephContext *cct = m_image_ctx.cct;
RWLock::RLocker l(m_image_ctx.owner_lock);
// should have been canceled prior to releasing lock
ceph_assert(m_image_ctx.exclusive_lock == nullptr ||
m_image_ctx.exclusive_lock->is_lock_owner());
ldout(cct, 5) << this << " send_trim_image" << dendl;
m_state = STATE_TRIM_IMAGE;
uint64_t new_size;
uint64_t orig_size;
{
RWLock::RLocker l(m_image_ctx.snap_lock);
ceph_assert(m_image_ctx.object_map != nullptr);
new_size = get_image_size();
orig_size = m_image_ctx.get_object_size() *
m_image_ctx.object_map->size();
}
TrimRequest<I> *req = TrimRequest<I>::create(m_image_ctx,
this->create_callback_context(),
orig_size, new_size, m_prog_ctx);
req->send();
}
template <typename I>
bool update_object_map(I& image_ctx, uint64_t object_no, uint8_t current_state,
uint8_t new_state) {
CephContext *cct = image_ctx.cct;
uint64_t snap_id = image_ctx.snap_id;
uint8_t state = (*image_ctx.object_map)[object_no];
if (state == OBJECT_EXISTS && new_state == OBJECT_NONEXISTENT &&
snap_id == CEPH_NOSNAP) {
// might be writing object to OSD concurrently
new_state = state;
}
if (new_state != state) {
ldout(cct, 15) << image_ctx.get_object_name(object_no)
<< " rebuild updating object map "
<< static_cast<uint32_t>(state) << "->"
<< static_cast<uint32_t>(new_state) << dendl;
(*image_ctx.object_map)[object_no] = new_state;
}
return false;
}
template <typename I>
void RebuildObjectMapRequest<I>::send_verify_objects() {
ceph_assert(m_image_ctx.owner_lock.is_locked());
CephContext *cct = m_image_ctx.cct;
m_state = STATE_VERIFY_OBJECTS;
ldout(cct, 5) << this << " send_verify_objects" << dendl;
ObjectMapIterateRequest<I> *req =
new ObjectMapIterateRequest<I>(m_image_ctx,
this->create_callback_context(),
m_prog_ctx, update_object_map);
req->send();
}
template <typename I>
void RebuildObjectMapRequest<I>::send_save_object_map() {
ceph_assert(m_image_ctx.owner_lock.is_locked());
CephContext *cct = m_image_ctx.cct;
ldout(cct, 5) << this << " send_save_object_map" << dendl;
m_state = STATE_SAVE_OBJECT_MAP;
// should have been canceled prior to releasing lock
ceph_assert(m_image_ctx.exclusive_lock == nullptr ||
m_image_ctx.exclusive_lock->is_lock_owner());
RWLock::RLocker snap_locker(m_image_ctx.snap_lock);
ceph_assert(m_image_ctx.object_map != nullptr);
m_image_ctx.object_map->aio_save(this->create_callback_context());
}
template <typename I>
void RebuildObjectMapRequest<I>::send_update_header() {
ceph_assert(m_image_ctx.owner_lock.is_locked());
// should have been canceled prior to releasing lock
ceph_assert(m_image_ctx.exclusive_lock == nullptr ||
m_image_ctx.exclusive_lock->is_lock_owner());
ldout(m_image_ctx.cct, 5) << this << " send_update_header" << dendl;
m_state = STATE_UPDATE_HEADER;
librados::ObjectWriteOperation op;
uint64_t flags = RBD_FLAG_OBJECT_MAP_INVALID | RBD_FLAG_FAST_DIFF_INVALID;
cls_client::set_flags(&op, m_image_ctx.snap_id, 0, flags);
librados::AioCompletion *comp = this->create_callback_completion();
int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op);
ceph_assert(r == 0);
comp->release();
RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
m_image_ctx.update_flags(m_image_ctx.snap_id, flags, false);
}
template <typename I>
uint64_t RebuildObjectMapRequest<I>::get_image_size() const {
ceph_assert(m_image_ctx.snap_lock.is_locked());
if (m_image_ctx.snap_id == CEPH_NOSNAP) {
if (!m_image_ctx.resize_reqs.empty()) {
return m_image_ctx.resize_reqs.front()->get_image_size();
} else {
return m_image_ctx.size;
}
}
return m_image_ctx.get_image_size(m_image_ctx.snap_id);
}
} // namespace operation
} // namespace librbd
template class librbd::operation::RebuildObjectMapRequest<librbd::ImageCtx>;
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