+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "librbd/io/ObjectRequest.h"
-#include "common/ceph_context.h"
-#include "common/dout.h"
-#include "common/errno.h"
-#include "common/Mutex.h"
-#include "common/RWLock.h"
-#include "common/WorkQueue.h"
-#include "include/Context.h"
-#include "include/err.h"
-
-#include "librbd/ExclusiveLock.h"
-#include "librbd/ImageCtx.h"
-#include "librbd/ObjectMap.h"
-#include "librbd/Utils.h"
-#include "librbd/io/AioCompletion.h"
-#include "librbd/io/CopyupRequest.h"
-#include "librbd/io/ImageRequest.h"
-#include "librbd/io/ReadResult.h"
-
-#include <boost/bind.hpp>
-#include <boost/optional.hpp>
-
-#define dout_subsys ceph_subsys_rbd
-#undef dout_prefix
-#define dout_prefix *_dout << "librbd::io::ObjectRequest: " << this \
- << " " << __func__ << ": "
-
-namespace librbd {
-namespace io {
-
-template <typename I>
-ObjectRequest<I>*
-ObjectRequest<I>::create_remove(I *ictx, const std::string &oid,
- uint64_t object_no,
- const ::SnapContext &snapc,
- const ZTracer::Trace &parent_trace,
- Context *completion) {
- return new ObjectRemoveRequest(util::get_image_ctx(ictx), oid, object_no,
- snapc, parent_trace, completion);
-}
-
-template <typename I>
-ObjectRequest<I>*
-ObjectRequest<I>::create_truncate(I *ictx, const std::string &oid,
- uint64_t object_no, uint64_t object_off,
- const ::SnapContext &snapc,
- const ZTracer::Trace &parent_trace,
- Context *completion) {
- return new ObjectTruncateRequest(util::get_image_ctx(ictx), oid, object_no,
- object_off, snapc, parent_trace, completion);
-}
-
-template <typename I>
-ObjectRequest<I>*
-ObjectRequest<I>::create_trim(I *ictx, const std::string &oid,
- uint64_t object_no, const ::SnapContext &snapc,
- bool post_object_map_update,
- Context *completion) {
- return new ObjectTrimRequest(util::get_image_ctx(ictx), oid, object_no,
- snapc, post_object_map_update, completion);
-}
-
-template <typename I>
-ObjectRequest<I>*
-ObjectRequest<I>::create_write(I *ictx, const std::string &oid,
- uint64_t object_no, uint64_t object_off,
- const ceph::bufferlist &data,
- const ::SnapContext &snapc, int op_flags,
- const ZTracer::Trace &parent_trace,
- Context *completion) {
- return new ObjectWriteRequest(util::get_image_ctx(ictx), oid, object_no,
- object_off, data, snapc, op_flags, parent_trace,
- completion);
-}
-
-template <typename I>
-ObjectRequest<I>*
-ObjectRequest<I>::create_zero(I *ictx, const std::string &oid,
- uint64_t object_no, uint64_t object_off,
- uint64_t object_len,
- const ::SnapContext &snapc,
- const ZTracer::Trace &parent_trace,
- Context *completion) {
- return new ObjectZeroRequest(util::get_image_ctx(ictx), oid, object_no,
- object_off, object_len, snapc, parent_trace,
- completion);
-}
-
-template <typename I>
-ObjectRequest<I>*
-ObjectRequest<I>::create_writesame(I *ictx, const std::string &oid,
- uint64_t object_no, uint64_t object_off,
- uint64_t object_len,
- const ceph::bufferlist &data,
- const ::SnapContext &snapc, int op_flags,
- const ZTracer::Trace &parent_trace,
- Context *completion) {
- return new ObjectWriteSameRequest(util::get_image_ctx(ictx), oid, object_no,
- object_off, object_len, data, snapc,
- op_flags, parent_trace, completion);
-}
-
-template <typename I>
-ObjectRequest<I>*
-ObjectRequest<I>::create_compare_and_write(I *ictx, const std::string &oid,
- uint64_t object_no, uint64_t object_off,
- const ceph::bufferlist &cmp_data,
- const ceph::bufferlist &write_data,
- const ::SnapContext &snapc,
- uint64_t *mismatch_offset,
- int op_flags,
- const ZTracer::Trace &parent_trace,
- Context *completion) {
- return new ObjectCompareAndWriteRequest(util::get_image_ctx(ictx), oid,
- object_no, object_off, cmp_data,
- write_data, snapc, mismatch_offset,
- op_flags, parent_trace, completion);
-}
-
-template <typename I>
-ObjectRequest<I>::ObjectRequest(ImageCtx *ictx, const std::string &oid,
- uint64_t objectno, uint64_t off,
- uint64_t len, librados::snap_t snap_id,
- bool hide_enoent, const char *trace_name,
- const ZTracer::Trace &trace,
- Context *completion)
- : m_ictx(ictx), m_oid(oid), m_object_no(objectno), m_object_off(off),
- m_object_len(len), m_snap_id(snap_id), m_completion(completion),
- m_hide_enoent(hide_enoent),
- m_trace(util::create_trace(*ictx, "", trace)) {
- if (m_trace.valid()) {
- m_trace.copy_name(trace_name + std::string(" ") + oid);
- m_trace.event("start");
- }
-
- Striper::extent_to_file(m_ictx->cct, &m_ictx->layout, m_object_no,
- 0, m_ictx->layout.object_size, m_parent_extents);
-
- RWLock::RLocker snap_locker(m_ictx->snap_lock);
- RWLock::RLocker parent_locker(m_ictx->parent_lock);
- compute_parent_extents();
-}
-
-template <typename I>
-void ObjectRequest<I>::complete(int r)
-{
- if (should_complete(r)) {
- ldout(m_ictx->cct, 20) << dendl;
- if (m_hide_enoent && r == -ENOENT) {
- r = 0;
- }
- m_completion->complete(r);
- delete this;
- }
-}
-
-template <typename I>
-bool ObjectRequest<I>::compute_parent_extents() {
- assert(m_ictx->snap_lock.is_locked());
- assert(m_ictx->parent_lock.is_locked());
-
- uint64_t parent_overlap;
- int r = m_ictx->get_parent_overlap(m_snap_id, &parent_overlap);
- if (r < 0) {
- // NOTE: it's possible for a snapshot to be deleted while we are
- // still reading from it
- lderr(m_ictx->cct) << "failed to retrieve parent overlap: "
- << cpp_strerror(r)
- << dendl;
- m_has_parent = false;
- m_parent_extents.clear();
- return false;
- }
-
- uint64_t object_overlap = m_ictx->prune_parent_extents(
- m_parent_extents, parent_overlap);
- if (object_overlap > 0) {
- ldout(m_ictx->cct, 20) << "overlap " << parent_overlap << " "
- << "extents " << m_parent_extents << dendl;
- m_has_parent = !m_parent_extents.empty();
- return true;
- }
- return false;
-}
-
-static inline bool is_copy_on_read(ImageCtx *ictx, librados::snap_t snap_id) {
- assert(ictx->snap_lock.is_locked());
- return (ictx->clone_copy_on_read &&
- !ictx->read_only && snap_id == CEPH_NOSNAP &&
- (ictx->exclusive_lock == nullptr ||
- ictx->exclusive_lock->is_lock_owner()));
-}
-
-/** read **/
-
-template <typename I>
-ObjectReadRequest<I>::ObjectReadRequest(I *ictx, const std::string &oid,
- uint64_t objectno, uint64_t offset,
- uint64_t len, Extents& be,
- librados::snap_t snap_id, bool sparse,
- int op_flags,
- const ZTracer::Trace &parent_trace,
- Context *completion)
- : ObjectRequest<I>(util::get_image_ctx(ictx), oid, objectno, offset, len,
- snap_id, false, "read", parent_trace, completion),
- m_buffer_extents(be), m_tried_parent(false), m_sparse(sparse),
- m_op_flags(op_flags), m_state(LIBRBD_AIO_READ_FLAT) {
- guard_read();
-}
-
-template <typename I>
-void ObjectReadRequest<I>::guard_read()
-{
- ImageCtx *image_ctx = this->m_ictx;
- RWLock::RLocker snap_locker(image_ctx->snap_lock);
- RWLock::RLocker parent_locker(image_ctx->parent_lock);
-
- if (this->has_parent()) {
- ldout(image_ctx->cct, 20) << "guarding read" << dendl;
- m_state = LIBRBD_AIO_READ_GUARD;
- }
-}
-
-template <typename I>
-bool ObjectReadRequest<I>::should_complete(int r)
-{
- ImageCtx *image_ctx = this->m_ictx;
- ldout(image_ctx->cct, 20) << this->m_oid << " "
- << this->m_object_off << "~" << this->m_object_len
- << " r = " << r << dendl;
-
- bool finished = true;
-
- switch (m_state) {
- case LIBRBD_AIO_READ_GUARD:
- ldout(image_ctx->cct, 20) << "READ_CHECK_GUARD" << dendl;
-
- // This is the step to read from parent
- if (!m_tried_parent && r == -ENOENT) {
- {
- RWLock::RLocker snap_locker(image_ctx->snap_lock);
- RWLock::RLocker parent_locker(image_ctx->parent_lock);
- if (image_ctx->parent == NULL) {
- ldout(image_ctx->cct, 20) << "parent is gone; do nothing" << dendl;
- break;
- }
-
- // calculate reverse mapping onto the image
- vector<pair<uint64_t,uint64_t> > parent_extents;
- Striper::extent_to_file(image_ctx->cct, &image_ctx->layout,
- this->m_object_no, this->m_object_off,
- this->m_object_len, parent_extents);
-
- uint64_t parent_overlap = 0;
- uint64_t object_overlap = 0;
- r = image_ctx->get_parent_overlap(this->m_snap_id, &parent_overlap);
- if (r == 0) {
- object_overlap = image_ctx->prune_parent_extents(parent_extents,
- parent_overlap);
- }
-
- if (object_overlap > 0) {
- m_tried_parent = true;
- if (is_copy_on_read(image_ctx, this->m_snap_id)) {
- m_state = LIBRBD_AIO_READ_COPYUP;
- }
-
- read_from_parent(std::move(parent_extents));
- finished = false;
- }
- }
- }
- break;
- case LIBRBD_AIO_READ_COPYUP:
- ldout(image_ctx->cct, 20) << "READ_COPYUP" << dendl;
- // This is the extra step for copy-on-read: kick off an asynchronous copyup.
- // It is different from copy-on-write as asynchronous copyup will finish
- // by itself so state won't go back to LIBRBD_AIO_READ_GUARD.
-
- assert(m_tried_parent);
- if (r > 0) {
- // If read entire object from parent success and CoR is possible, kick
- // off a asynchronous copyup. This approach minimizes the latency
- // impact.
- send_copyup();
- }
- break;
- case LIBRBD_AIO_READ_FLAT:
- ldout(image_ctx->cct, 20) << "READ_FLAT" << dendl;
- // The read content should be deposit in m_read_data
- break;
- default:
- lderr(image_ctx->cct) << "invalid request state: " << m_state << dendl;
- ceph_abort();
- }
-
- return finished;
-}
-
-template <typename I>
-void ObjectReadRequest<I>::send() {
- ImageCtx *image_ctx = this->m_ictx;
- ldout(image_ctx->cct, 20) << this->m_oid << " " << this->m_object_off
- << "~" << this->m_object_len
- << dendl;
-
- {
- RWLock::RLocker snap_locker(image_ctx->snap_lock);
-
- // send read request to parent if the object doesn't exist locally
- if (image_ctx->object_map != nullptr &&
- !image_ctx->object_map->object_may_exist(this->m_object_no)) {
- image_ctx->op_work_queue->queue(util::create_context_callback<
- ObjectRequest<I> >(this), -ENOENT);
- return;
- }
- }
-
- librados::ObjectReadOperation op;
- int flags = image_ctx->get_read_flags(this->m_snap_id);
- if (m_sparse) {
- op.sparse_read(this->m_object_off, this->m_object_len, &m_ext_map,
- &m_read_data, nullptr);
- } else {
- op.read(this->m_object_off, this->m_object_len, &m_read_data, nullptr);
- }
- op.set_op_flags2(m_op_flags);
-
- librados::AioCompletion *rados_completion =
- util::create_rados_callback(this);
- int r = image_ctx->data_ctx.aio_operate(
- this->m_oid, rados_completion, &op, flags, nullptr,
- (this->m_trace.valid() ? this->m_trace.get_info() : nullptr));
- assert(r == 0);
-
- rados_completion->release();
-}
-
-template <typename I>
-void ObjectReadRequest<I>::send_copyup()
-{
- ImageCtx *image_ctx = this->m_ictx;
- ldout(image_ctx->cct, 20) << this->m_oid << " " << this->m_object_off
- << "~" << this->m_object_len << dendl;
-
- {
- RWLock::RLocker snap_locker(image_ctx->snap_lock);
- RWLock::RLocker parent_locker(image_ctx->parent_lock);
- if (!this->compute_parent_extents() ||
- (image_ctx->exclusive_lock != nullptr &&
- !image_ctx->exclusive_lock->is_lock_owner())) {
- return;
- }
- }
-
- Mutex::Locker copyup_locker(image_ctx->copyup_list_lock);
- map<uint64_t, CopyupRequest*>::iterator it =
- image_ctx->copyup_list.find(this->m_object_no);
- if (it == image_ctx->copyup_list.end()) {
- // create and kick off a CopyupRequest
- CopyupRequest *new_req = new CopyupRequest(
- image_ctx, this->m_oid, this->m_object_no,
- std::move(this->m_parent_extents), this->m_trace);
- this->m_parent_extents.clear();
-
- image_ctx->copyup_list[this->m_object_no] = new_req;
- new_req->send();
- }
-}
-
-template <typename I>
-void ObjectReadRequest<I>::read_from_parent(Extents&& parent_extents)
-{
- ImageCtx *image_ctx = this->m_ictx;
- AioCompletion *parent_completion = AioCompletion::create_and_start<
- ObjectRequest<I> >(this, image_ctx, AIO_TYPE_READ);
-
- ldout(image_ctx->cct, 20) << "parent completion " << parent_completion
- << " extents " << parent_extents << dendl;
- ImageRequest<>::aio_read(image_ctx->parent, parent_completion,
- std::move(parent_extents),
- ReadResult{&m_read_data}, 0, this->m_trace);
-}
-
-/** write **/
-
-AbstractObjectWriteRequest::AbstractObjectWriteRequest(ImageCtx *ictx,
- const std::string &oid,
- uint64_t object_no,
- uint64_t object_off,
- uint64_t len,
- const ::SnapContext &snapc,
- bool hide_enoent,
- const char *trace_name,
- const ZTracer::Trace &parent_trace,
- Context *completion)
- : ObjectRequest(ictx, oid, object_no, object_off, len, CEPH_NOSNAP,
- hide_enoent, trace_name, parent_trace, completion),
- m_state(LIBRBD_AIO_WRITE_FLAT), m_snap_seq(snapc.seq.val)
-{
- m_snaps.insert(m_snaps.end(), snapc.snaps.begin(), snapc.snaps.end());
-}
-
-void AbstractObjectWriteRequest::guard_write()
-{
- if (has_parent()) {
- m_state = LIBRBD_AIO_WRITE_GUARD;
- m_write.assert_exists();
- ldout(m_ictx->cct, 20) << "guarding write" << dendl;
- }
-}
-
-bool AbstractObjectWriteRequest::should_complete(int r)
-{
- ldout(m_ictx->cct, 20) << get_op_type() << m_oid << " "
- << m_object_off << "~" << m_object_len
- << " r = " << r << dendl;
-
- bool finished = true;
- switch (m_state) {
- case LIBRBD_AIO_WRITE_PRE:
- ldout(m_ictx->cct, 20) << "WRITE_PRE" << dendl;
- if (r < 0) {
- return true;
- }
-
- send_write_op();
- finished = false;
- break;
-
- case LIBRBD_AIO_WRITE_POST:
- ldout(m_ictx->cct, 20) << "WRITE_POST" << dendl;
- finished = true;
- break;
-
- case LIBRBD_AIO_WRITE_GUARD:
- ldout(m_ictx->cct, 20) << "WRITE_CHECK_GUARD" << dendl;
-
- if (r == -ENOENT) {
- handle_write_guard();
- finished = false;
- break;
- } else if (r < 0) {
- // pass the error code to the finish context
- m_state = LIBRBD_AIO_WRITE_ERROR;
- complete(r);
- finished = false;
- break;
- }
-
- finished = send_post_object_map_update();
- break;
-
- case LIBRBD_AIO_WRITE_COPYUP:
- ldout(m_ictx->cct, 20) << "WRITE_COPYUP" << dendl;
- if (r < 0) {
- m_state = LIBRBD_AIO_WRITE_ERROR;
- complete(r);
- finished = false;
- } else {
- finished = send_post_object_map_update();
- }
- break;
-
- case LIBRBD_AIO_WRITE_FLAT:
- ldout(m_ictx->cct, 20) << "WRITE_FLAT" << dendl;
-
- finished = send_post_object_map_update();
- break;
-
- case LIBRBD_AIO_WRITE_ERROR:
- assert(r < 0);
- lderr(m_ictx->cct) << "WRITE_ERROR: " << cpp_strerror(r) << dendl;
- break;
-
- default:
- lderr(m_ictx->cct) << "invalid request state: " << m_state << dendl;
- ceph_abort();
- }
-
- return finished;
-}
-
-void AbstractObjectWriteRequest::send() {
- ldout(m_ictx->cct, 20) << get_op_type() << " " << m_oid << " "
- << m_object_off << "~" << m_object_len << dendl;
- {
- RWLock::RLocker snap_lock(m_ictx->snap_lock);
- if (m_ictx->object_map == nullptr) {
- m_object_exist = true;
- } else {
- // should have been flushed prior to releasing lock
- assert(m_ictx->exclusive_lock->is_lock_owner());
- m_object_exist = m_ictx->object_map->object_may_exist(m_object_no);
- }
- }
-
- send_write();
-}
-
-void AbstractObjectWriteRequest::send_pre_object_map_update() {
- ldout(m_ictx->cct, 20) << dendl;
-
- {
- RWLock::RLocker snap_lock(m_ictx->snap_lock);
- if (m_ictx->object_map != nullptr) {
- uint8_t new_state;
- pre_object_map_update(&new_state);
- RWLock::WLocker object_map_locker(m_ictx->object_map_lock);
- ldout(m_ictx->cct, 20) << m_oid << " " << m_object_off
- << "~" << m_object_len << dendl;
- m_state = LIBRBD_AIO_WRITE_PRE;
-
- if (m_ictx->object_map->aio_update<ObjectRequest>(
- CEPH_NOSNAP, m_object_no, new_state, {}, this->m_trace, this)) {
- return;
- }
- }
- }
-
- send_write_op();
-}
-
-bool AbstractObjectWriteRequest::send_post_object_map_update() {
- ldout(m_ictx->cct, 20) << dendl;
-
- RWLock::RLocker snap_locker(m_ictx->snap_lock);
- if (m_ictx->object_map == nullptr || !post_object_map_update()) {
- return true;
- }
-
- // should have been flushed prior to releasing lock
- assert(m_ictx->exclusive_lock->is_lock_owner());
-
- RWLock::WLocker object_map_locker(m_ictx->object_map_lock);
- ldout(m_ictx->cct, 20) << m_oid << " " << m_object_off
- << "~" << m_object_len << dendl;
- m_state = LIBRBD_AIO_WRITE_POST;
-
- if (m_ictx->object_map->aio_update<ObjectRequest>(
- CEPH_NOSNAP, m_object_no, OBJECT_NONEXISTENT, OBJECT_PENDING,
- this->m_trace, this)) {
- return false;
- }
-
- return true;
-}
-
-void AbstractObjectWriteRequest::send_write() {
- ldout(m_ictx->cct, 20) << m_oid << " " << m_object_off << "~" << m_object_len
- << " object exist " << m_object_exist << dendl;
-
- if (!m_object_exist && has_parent()) {
- m_state = LIBRBD_AIO_WRITE_GUARD;
- handle_write_guard();
- } else {
- send_pre_object_map_update();
- }
-}
-
-void AbstractObjectWriteRequest::send_copyup()
-{
- ldout(m_ictx->cct, 20) << m_oid << " " << m_object_off
- << "~" << m_object_len << dendl;
- m_state = LIBRBD_AIO_WRITE_COPYUP;
-
- m_ictx->copyup_list_lock.Lock();
- map<uint64_t, CopyupRequest*>::iterator it =
- m_ictx->copyup_list.find(m_object_no);
- if (it == m_ictx->copyup_list.end()) {
- CopyupRequest *new_req = new CopyupRequest(m_ictx, m_oid,
- m_object_no,
- std::move(m_parent_extents),
- this->m_trace);
- m_parent_extents.clear();
-
- // make sure to wait on this CopyupRequest
- new_req->append_request(this);
- m_ictx->copyup_list[m_object_no] = new_req;
-
- m_ictx->copyup_list_lock.Unlock();
- new_req->send();
- } else {
- it->second->append_request(this);
- m_ictx->copyup_list_lock.Unlock();
- }
-}
-void AbstractObjectWriteRequest::send_write_op()
-{
- m_state = LIBRBD_AIO_WRITE_FLAT;
- if (m_guard) {
- guard_write();
- }
-
- add_write_ops(&m_write, true);
- assert(m_write.size() != 0);
-
- librados::AioCompletion *rados_completion =
- util::create_rados_callback(this);
- int r = m_ictx->data_ctx.aio_operate(
- m_oid, rados_completion, &m_write, m_snap_seq, m_snaps,
- (this->m_trace.valid() ? this->m_trace.get_info() : nullptr));
- assert(r == 0);
- rados_completion->release();
-}
-void AbstractObjectWriteRequest::handle_write_guard()
-{
- bool has_parent;
- {
- RWLock::RLocker snap_locker(m_ictx->snap_lock);
- RWLock::RLocker parent_locker(m_ictx->parent_lock);
- has_parent = compute_parent_extents();
- }
- // If parent still exists, overlap might also have changed.
- if (has_parent) {
- send_copyup();
- } else {
- // parent may have disappeared -- send original write again
- ldout(m_ictx->cct, 20) << "should_complete(" << this
- << "): parent overlap now 0" << dendl;
- send_write();
- }
-}
-
-void ObjectWriteRequest::add_write_ops(librados::ObjectWriteOperation *wr,
- bool set_hints) {
- RWLock::RLocker snap_locker(m_ictx->snap_lock);
- if (set_hints && m_ictx->enable_alloc_hint &&
- (m_ictx->object_map == nullptr || !m_object_exist)) {
- wr->set_alloc_hint(m_ictx->get_object_size(), m_ictx->get_object_size());
- }
-
- if (m_object_off == 0 && m_object_len == m_ictx->get_object_size()) {
- wr->write_full(m_write_data);
- } else {
- wr->write(m_object_off, m_write_data);
- }
- wr->set_op_flags2(m_op_flags);
-}
-
-void ObjectWriteRequest::send_write() {
- bool write_full = (m_object_off == 0 && m_object_len == m_ictx->get_object_size());
- ldout(m_ictx->cct, 20) << m_oid << " " << m_object_off << "~" << m_object_len
- << " object exist " << m_object_exist
- << " write_full " << write_full << dendl;
- if (write_full && !has_parent()) {
- m_guard = false;
- }
-
- AbstractObjectWriteRequest::send_write();
-}
-
-void ObjectRemoveRequest::guard_write() {
- // do nothing to disable write guard only if deep-copyup not required
- RWLock::RLocker snap_locker(m_ictx->snap_lock);
- if (!m_ictx->snaps.empty()) {
- AbstractObjectWriteRequest::guard_write();
- }
-}
-void ObjectRemoveRequest::send_write() {
- ldout(m_ictx->cct, 20) << m_oid << " remove " << " object exist "
- << m_object_exist << dendl;
- if (!m_object_exist && !has_parent()) {
- m_state = LIBRBD_AIO_WRITE_FLAT;
- Context *ctx = util::create_context_callback<ObjectRequest>(this);
- m_ictx->op_work_queue->queue(ctx, 0);
- } else {
- send_pre_object_map_update();
- }
-}
-
-void ObjectTruncateRequest::send_write() {
- ldout(m_ictx->cct, 20) << m_oid << " truncate " << m_object_off
- << " object exist " << m_object_exist << dendl;
- if (!m_object_exist && !has_parent()) {
- m_state = LIBRBD_AIO_WRITE_FLAT;
- Context *ctx = util::create_context_callback<ObjectRequest>(this);
- m_ictx->op_work_queue->queue(ctx, 0);
- } else {
- AbstractObjectWriteRequest::send_write();
- }
-}
-
-void ObjectZeroRequest::send_write() {
- ldout(m_ictx->cct, 20) << m_oid << " zero " << m_object_off << "~"
- << m_object_len << " object exist " << m_object_exist
- << dendl;
- if (!m_object_exist && !has_parent()) {
- m_state = LIBRBD_AIO_WRITE_FLAT;
- Context *ctx = util::create_context_callback<ObjectRequest>(this);
- m_ictx->op_work_queue->queue(ctx, 0);
- } else {
- AbstractObjectWriteRequest::send_write();
- }
-}
-
-void ObjectWriteSameRequest::add_write_ops(librados::ObjectWriteOperation *wr,
- bool set_hints) {
- RWLock::RLocker snap_locker(m_ictx->snap_lock);
- if (set_hints && m_ictx->enable_alloc_hint &&
- (m_ictx->object_map == nullptr || !m_object_exist)) {
- wr->set_alloc_hint(m_ictx->get_object_size(), m_ictx->get_object_size());
- }
-
- wr->writesame(m_object_off, m_object_len, m_write_data);
- wr->set_op_flags2(m_op_flags);
-}
-
-void ObjectWriteSameRequest::send_write() {
- bool write_full = (m_object_off == 0 && m_object_len == m_ictx->get_object_size());
- ldout(m_ictx->cct, 20) << m_oid << " " << m_object_off << "~" << m_object_len
- << " write_full " << write_full << dendl;
- if (write_full && !has_parent()) {
- m_guard = false;
- }
-
- AbstractObjectWriteRequest::send_write();
-}
-
-void ObjectCompareAndWriteRequest::add_write_ops(librados::ObjectWriteOperation *wr,
- bool set_hints) {
- RWLock::RLocker snap_locker(m_ictx->snap_lock);
-
- if (set_hints && m_ictx->enable_alloc_hint &&
- (m_ictx->object_map == nullptr || !m_object_exist)) {
- wr->set_alloc_hint(m_ictx->get_object_size(), m_ictx->get_object_size());
- }
-
- // add cmpext ops
- wr->cmpext(m_object_off, m_cmp_bl, nullptr);
-
- if (m_object_off == 0 && m_object_len == m_ictx->get_object_size()) {
- wr->write_full(m_write_bl);
- } else {
- wr->write(m_object_off, m_write_bl);
- }
- wr->set_op_flags2(m_op_flags);
-}
-
-void ObjectCompareAndWriteRequest::send_write() {
- bool write_full = (m_object_off == 0 &&
- m_object_len == m_ictx->get_object_size());
- ldout(m_ictx->cct, 20) << "send_write " << this << " " << m_oid << " "
- << m_object_off << "~" << m_object_len
- << " object exist " << m_object_exist
- << " write_full " << write_full << dendl;
- if (write_full && !has_parent()) {
- m_guard = false;
- }
-
- AbstractObjectWriteRequest::send_write();
-}
-
-void ObjectCompareAndWriteRequest::complete(int r)
-{
- if (should_complete(r)) {
- ImageCtx *image_ctx = this->m_ictx;
- ldout(m_ictx->cct, 20) << "complete " << this << dendl;
-
- if (this->m_hide_enoent && r == -ENOENT) {
- r = 0;
- }
-
- vector<pair<uint64_t,uint64_t> > file_extents;
- if (r <= -MAX_ERRNO) {
- // object extent compare mismatch
- uint64_t offset = -MAX_ERRNO - r;
- Striper::extent_to_file(image_ctx->cct, &image_ctx->layout,
- this->m_object_no, offset, this->m_object_len,
- file_extents);
-
- assert(file_extents.size() == 1);
-
- uint64_t mismatch_offset = file_extents[0].first;
- if (this->m_mismatch_offset)
- *this->m_mismatch_offset = mismatch_offset;
- r = -EILSEQ;
- }
-
- //compare and write object extent error
- m_completion->complete(r);
- delete this;
- }
-}
-
-} // namespace io
-} // namespace librbd
-
-template class librbd::io::ObjectRequest<librbd::ImageCtx>;
-template class librbd::io::ObjectReadRequest<librbd::ImageCtx>;
Code Review / stor4nfv.git / blobdiff