[ceph.git] / ceph / src / librbd / operation / TrimRequest.cc

// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab

#include "librbd/operation/TrimRequest.h"
#include "librbd/AsyncObjectThrottle.h"
#include "librbd/ExclusiveLock.h"
#include "librbd/ImageCtx.h"
#include "librbd/internal.h"
#include "librbd/ObjectMap.h"
#include "librbd/Utils.h"
#include "librbd/io/ObjectDispatchSpec.h"
#include "librbd/io/ObjectDispatcher.h"
#include "common/ContextCompletion.h"
#include "common/dout.h"
#include "common/errno.h"
#include "osdc/Striper.h"

#include <boost/bind.hpp>
#include <boost/lambda/bind.hpp>
#include <boost/lambda/construct.hpp>
#include <boost/scope_exit.hpp>

#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::TrimRequest: "

namespace librbd {
namespace operation {

template <typename I>
class C_CopyupObject : public C_AsyncObjectThrottle<I> {
public:
  C_CopyupObject(AsyncObjectThrottle<I> &throttle, I *image_ctx,
                 ::SnapContext snapc, uint64_t object_no)
    : C_AsyncObjectThrottle<I>(throttle, *image_ctx), m_snapc(snapc),
      m_object_no(object_no)
  {
  }

  int send() override {
    I &image_ctx = this->m_image_ctx;
    ceph_assert(image_ctx.owner_lock.is_locked());
    ceph_assert(image_ctx.exclusive_lock == nullptr ||
                image_ctx.exclusive_lock->is_lock_owner());

    string oid = image_ctx.get_object_name(m_object_no);
    ldout(image_ctx.cct, 10) << "removing (with copyup) " << oid << dendl;

    auto object_dispatch_spec = io::ObjectDispatchSpec::create_discard(
      &image_ctx, io::OBJECT_DISPATCH_LAYER_NONE, oid, m_object_no, 0,
      image_ctx.layout.object_size, m_snapc,
      io::OBJECT_DISCARD_FLAG_DISABLE_OBJECT_MAP_UPDATE, 0, {}, this);
    object_dispatch_spec->send();
    return 0;
  }
private:
  ::SnapContext m_snapc;
  uint64_t m_object_no;
};

template <typename I>
class C_RemoveObject : public C_AsyncObjectThrottle<I> {
public:
  C_RemoveObject(AsyncObjectThrottle<I> &throttle, I *image_ctx,
                 uint64_t object_no)
    : C_AsyncObjectThrottle<I>(throttle, *image_ctx), m_object_no(object_no)
  {
  }

  int send() override {
    I &image_ctx = this->m_image_ctx;
    ceph_assert(image_ctx.owner_lock.is_locked());
    ceph_assert(image_ctx.exclusive_lock == nullptr ||
                image_ctx.exclusive_lock->is_lock_owner());

    {
      RWLock::RLocker snap_locker(image_ctx.snap_lock);
      if (image_ctx.object_map != nullptr &&
          !image_ctx.object_map->object_may_exist(m_object_no)) {
        return 1;
      }
    }

    string oid = image_ctx.get_object_name(m_object_no);
    ldout(image_ctx.cct, 10) << "removing " << oid << dendl;

    librados::AioCompletion *rados_completion =
      util::create_rados_callback(this);
    int r = image_ctx.data_ctx.aio_remove(oid, rados_completion);
    ceph_assert(r == 0);
    rados_completion->release();
    return 0;
  }

private:
  uint64_t m_object_no;
};

template <typename I>
TrimRequest<I>::TrimRequest(I &image_ctx, Context *on_finish,
                            uint64_t original_size, uint64_t new_size,
                            ProgressContext &prog_ctx)
  : AsyncRequest<I>(image_ctx, on_finish), m_new_size(new_size),
    m_prog_ctx(prog_ctx)
{
  uint64_t period = image_ctx.get_stripe_period();
  uint64_t new_num_periods = ((m_new_size + period - 1) / period);
  m_delete_off = std::min(new_num_periods * period, original_size);
  // first object we can delete free and clear
  m_delete_start = new_num_periods * image_ctx.get_stripe_count();
  m_delete_start_min = m_delete_start;
  m_num_objects = Striper::get_num_objects(image_ctx.layout, original_size);

  CephContext *cct = image_ctx.cct;
  ldout(cct, 10) << this << " trim image " << original_size << " -> "
		 << m_new_size << " periods " << new_num_periods
                 << " discard to offset " << m_delete_off
                 << " delete objects " << m_delete_start
                 << " to " << m_num_objects << dendl;
}

template <typename I>
bool TrimRequest<I>::should_complete(int r)
{
  I &image_ctx = this->m_image_ctx;
  CephContext *cct = image_ctx.cct;
  ldout(cct, 5) << this << " should_complete: r=" << r << dendl;
  if (r == -ERESTART) {
    ldout(cct, 5) << "trim operation interrupted" << dendl;
    return true;
  } else if (r < 0) {
    lderr(cct) << "trim encountered an error: " << cpp_strerror(r) << dendl;
    return true;
  }

  RWLock::RLocker owner_lock(image_ctx.owner_lock);
  switch (m_state) {
  case STATE_PRE_TRIM:
    ldout(cct, 5) << " PRE_TRIM" << dendl;
    send_copyup_objects();
    break;

  case STATE_COPYUP_OBJECTS:
    ldout(cct, 5) << " COPYUP_OBJECTS" << dendl;
    send_remove_objects();
    break;

  case STATE_REMOVE_OBJECTS:
    ldout(cct, 5) << " REMOVE_OBJECTS" << dendl;
    send_post_trim();
    break;

  case STATE_POST_TRIM:
    ldout(cct, 5) << " POST_TRIM" << dendl;
    send_clean_boundary();
    break;

  case STATE_CLEAN_BOUNDARY:
    ldout(cct, 5) << "CLEAN_BOUNDARY" << dendl;
    send_finish(0);
    break;

  case STATE_FINISHED:
    ldout(cct, 5) << "FINISHED" << dendl;
    return true;

  default:
    lderr(cct) << "invalid state: " << m_state << dendl;
    ceph_abort();
    break;
  }
  return false;
}

template <typename I>
void TrimRequest<I>::send() {
  send_pre_trim();
}

template<typename I>
void TrimRequest<I>::send_pre_trim() {
  I &image_ctx = this->m_image_ctx;
  ceph_assert(image_ctx.owner_lock.is_locked());

  if (m_delete_start >= m_num_objects) {
    send_clean_boundary();
    return;
  }

  {
    RWLock::RLocker snap_locker(image_ctx.snap_lock);
    if (image_ctx.object_map != nullptr) {
      ldout(image_ctx.cct, 5) << this << " send_pre_trim: "
                              << " delete_start_min=" << m_delete_start_min
                              << " num_objects=" << m_num_objects << dendl;
      m_state = STATE_PRE_TRIM;

      ceph_assert(image_ctx.exclusive_lock->is_lock_owner());

      RWLock::WLocker object_map_locker(image_ctx.object_map_lock);
      if (image_ctx.object_map->template aio_update<AsyncRequest<I> >(
            CEPH_NOSNAP, m_delete_start_min, m_num_objects, OBJECT_PENDING,
            OBJECT_EXISTS, {}, false, this)) {
        return;
      }
    }
  }

  send_copyup_objects();
}

template<typename I>
void TrimRequest<I>::send_copyup_objects() {
  I &image_ctx = this->m_image_ctx;
  ceph_assert(image_ctx.owner_lock.is_locked());

  ::SnapContext snapc;
  bool has_snapshots;
  uint64_t parent_overlap;
  {
    RWLock::RLocker snap_locker(image_ctx.snap_lock);
    RWLock::RLocker parent_locker(image_ctx.parent_lock);

    snapc = image_ctx.snapc;
    has_snapshots = !image_ctx.snaps.empty();
    int r = image_ctx.get_parent_overlap(CEPH_NOSNAP, &parent_overlap);
    ceph_assert(r == 0);
  }

  // copyup is only required for portion of image that overlaps parent
  uint64_t copyup_end = Striper::get_num_objects(image_ctx.layout,
                                                 parent_overlap);

  // TODO: protect against concurrent shrink and snap create?
  // skip to remove if no copyup is required.
  if (copyup_end <= m_delete_start || !has_snapshots) {
    send_remove_objects();
    return;
  }

  uint64_t copyup_start = m_delete_start;
  m_delete_start = copyup_end;

  ldout(image_ctx.cct, 5) << this << " send_copyup_objects: "
                          << " start object=" << copyup_start << ", "
                          << " end object=" << copyup_end << dendl;
  m_state = STATE_COPYUP_OBJECTS;

  Context *ctx = this->create_callback_context();
  typename AsyncObjectThrottle<I>::ContextFactory context_factory(
    boost::lambda::bind(boost::lambda::new_ptr<C_CopyupObject<I> >(),
      boost::lambda::_1, &image_ctx, snapc, boost::lambda::_2));
  AsyncObjectThrottle<I> *throttle = new AsyncObjectThrottle<I>(
    this, image_ctx, context_factory, ctx, &m_prog_ctx, copyup_start,
    copyup_end);
  throttle->start_ops(
    image_ctx.config.template get_val<uint64_t>("rbd_concurrent_management_ops"));
}

template <typename I>
void TrimRequest<I>::send_remove_objects() {
  I &image_ctx = this->m_image_ctx;
  ceph_assert(image_ctx.owner_lock.is_locked());

  ldout(image_ctx.cct, 5) << this << " send_remove_objects: "
			    << " delete_start=" << m_delete_start
			    << " num_objects=" << m_num_objects << dendl;
  m_state = STATE_REMOVE_OBJECTS;

  Context *ctx = this->create_callback_context();
  typename AsyncObjectThrottle<I>::ContextFactory context_factory(
    boost::lambda::bind(boost::lambda::new_ptr<C_RemoveObject<I> >(),
      boost::lambda::_1, &image_ctx, boost::lambda::_2));
  AsyncObjectThrottle<I> *throttle = new AsyncObjectThrottle<I>(
    this, image_ctx, context_factory, ctx, &m_prog_ctx, m_delete_start,
    m_num_objects);
  throttle->start_ops(
    image_ctx.config.template get_val<uint64_t>("rbd_concurrent_management_ops"));
}

template<typename I>
void TrimRequest<I>::send_post_trim() {
  I &image_ctx = this->m_image_ctx;
  ceph_assert(image_ctx.owner_lock.is_locked());

  {
    RWLock::RLocker snap_locker(image_ctx.snap_lock);
    if (image_ctx.object_map != nullptr) {
      ldout(image_ctx.cct, 5) << this << " send_post_trim:"
                              << " delete_start_min=" << m_delete_start_min
                              << " num_objects=" << m_num_objects << dendl;
      m_state = STATE_POST_TRIM;

      ceph_assert(image_ctx.exclusive_lock->is_lock_owner());

      RWLock::WLocker object_map_locker(image_ctx.object_map_lock);
      if (image_ctx.object_map->template aio_update<AsyncRequest<I> >(
            CEPH_NOSNAP, m_delete_start_min, m_num_objects, OBJECT_NONEXISTENT,
            OBJECT_PENDING, {}, false, this)) {
        return;
      }
    }
  }

  send_clean_boundary();
}

template <typename I>
void TrimRequest<I>::send_clean_boundary() {
  I &image_ctx = this->m_image_ctx;
  ceph_assert(image_ctx.owner_lock.is_locked());
  CephContext *cct = image_ctx.cct;
  if (m_delete_off <= m_new_size) {
    send_finish(0);
    return;
  }

  // should have been canceled prior to releasing lock
  ceph_assert(image_ctx.exclusive_lock == nullptr ||
              image_ctx.exclusive_lock->is_lock_owner());
  uint64_t delete_len = m_delete_off - m_new_size;
  ldout(image_ctx.cct, 5) << this << " send_clean_boundary: "
			    << " delete_off=" << m_delete_off
			    << " length=" << delete_len << dendl;
  m_state = STATE_CLEAN_BOUNDARY;

  ::SnapContext snapc;
  {
    RWLock::RLocker snap_locker(image_ctx.snap_lock);
    snapc = image_ctx.snapc;
  }

  // discard the weird boundary
  std::vector<ObjectExtent> extents;
  Striper::file_to_extents(cct, image_ctx.format_string,
			   &image_ctx.layout, m_new_size, delete_len, 0,
                           extents);

  ContextCompletion *completion =
    new ContextCompletion(this->create_async_callback_context(), true);
  for (vector<ObjectExtent>::iterator p = extents.begin();
       p != extents.end(); ++p) {
    ldout(cct, 20) << " ex " << *p << dendl;
    Context *req_comp = new C_ContextCompletion(*completion);

    if (p->offset == 0) {
      // treat as a full object delete on the boundary
      p->length = image_ctx.layout.object_size;
    }

    auto object_dispatch_spec = io::ObjectDispatchSpec::create_discard(
      &image_ctx, io::OBJECT_DISPATCH_LAYER_NONE, p->oid.name, p->objectno,
      p->offset, p->length, snapc, 0, 0, {}, req_comp);
    object_dispatch_spec->send();
  }
  completion->finish_adding_requests();
}

template <typename I>
void TrimRequest<I>::send_finish(int r) {
  m_state = STATE_FINISHED;
  this->async_complete(r);
}

} // namespace operation
} // namespace librbd

template class librbd::operation::TrimRequest<librbd::ImageCtx>;
Commit	Line	Data
7c673cae FG	1	// -- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t --
	2	// vim: ts=8 sw=2 smarttab
	3
	4	#include "librbd/operation/TrimRequest.h"
	5	#include "librbd/AsyncObjectThrottle.h"
	6	#include "librbd/ExclusiveLock.h"
	7	#include "librbd/ImageCtx.h"
	8	#include "librbd/internal.h"
	9	#include "librbd/ObjectMap.h"
	10	#include "librbd/Utils.h"
11fdf7f2 TL	11	#include "librbd/io/ObjectDispatchSpec.h"
11fdf7f2 TL	12	#include "librbd/io/ObjectDispatcher.h"
7c673cae FG	13	#include "common/ContextCompletion.h"
	14	#include "common/dout.h"
	15	#include "common/errno.h"
	16	#include "osdc/Striper.h"
	17
	18	#include <boost/bind.hpp>
	19	#include <boost/lambda/bind.hpp>
	20	#include <boost/lambda/construct.hpp>
	21	#include <boost/scope_exit.hpp>
	22
	23	#define dout_subsys ceph_subsys_rbd
	24	#undef dout_prefix
	25	#define dout_prefix *_dout << "librbd::TrimRequest: "
	26
	27	namespace librbd {
	28	namespace operation {
	29
	30	template <typename I>
	31	class C_CopyupObject : public C_AsyncObjectThrottle<I> {
	32	public:
	33	C_CopyupObject(AsyncObjectThrottle<I> &throttle, I *image_ctx,
	34	::SnapContext snapc, uint64_t object_no)
	35	: C_AsyncObjectThrottle<I>(throttle, *image_ctx), m_snapc(snapc),
	36	m_object_no(object_no)
	37	{
	38	}
	39
	40	int send() override {
	41	I &image_ctx = this->m_image_ctx;
11fdf7f2 TL	42	ceph_assert(image_ctx.owner_lock.is_locked());
	43	ceph_assert(image_ctx.exclusive_lock == nullptr \|\|
	44	image_ctx.exclusive_lock->is_lock_owner());
7c673cae FG	45
	46	string oid = image_ctx.get_object_name(m_object_no);
	47	ldout(image_ctx.cct, 10) << "removing (with copyup) " << oid << dendl;
	48
11fdf7f2 TL	49	auto object_dispatch_spec = io::ObjectDispatchSpec::create_discard(
	50	&image_ctx, io::OBJECT_DISPATCH_LAYER_NONE, oid, m_object_no, 0,
	51	image_ctx.layout.object_size, m_snapc,
	52	io::OBJECT_DISCARD_FLAG_DISABLE_OBJECT_MAP_UPDATE, 0, {}, this);
	53	object_dispatch_spec->send();
7c673cae FG	54	return 0;
	55	}
	56	private:
	57	::SnapContext m_snapc;
	58	uint64_t m_object_no;
	59	};
	60
	61	template <typename I>
	62	class C_RemoveObject : public C_AsyncObjectThrottle<I> {
	63	public:
3efd9988	64	C_RemoveObject(AsyncObjectThrottle<I> &throttle, I *image_ctx,
7c673cae FG	65	uint64_t object_no)
	66	: C_AsyncObjectThrottle<I>(throttle, *image_ctx), m_object_no(object_no)
	67	{
	68	}
	69
	70	int send() override {
	71	I &image_ctx = this->m_image_ctx;
11fdf7f2 TL	72	ceph_assert(image_ctx.owner_lock.is_locked());
	73	ceph_assert(image_ctx.exclusive_lock == nullptr \|\|
	74	image_ctx.exclusive_lock->is_lock_owner());
7c673cae FG	75
	76	{
	77	RWLock::RLocker snap_locker(image_ctx.snap_lock);
	78	if (image_ctx.object_map != nullptr &&
	79	!image_ctx.object_map->object_may_exist(m_object_no)) {
	80	return 1;
	81	}
	82	}
	83
	84	string oid = image_ctx.get_object_name(m_object_no);
	85	ldout(image_ctx.cct, 10) << "removing " << oid << dendl;
	86
	87	librados::AioCompletion *rados_completion =
	88	util::create_rados_callback(this);
	89	int r = image_ctx.data_ctx.aio_remove(oid, rados_completion);
11fdf7f2	90	ceph_assert(r == 0);
7c673cae FG	91	rados_completion->release();
	92	return 0;
	93	}
	94
	95	private:
	96	uint64_t m_object_no;
	97	};
	98
	99	template <typename I>
	100	TrimRequest<I>::TrimRequest(I &image_ctx, Context *on_finish,
	101	uint64_t original_size, uint64_t new_size,
	102	ProgressContext &prog_ctx)
	103	: AsyncRequest<I>(image_ctx, on_finish), m_new_size(new_size),
	104	m_prog_ctx(prog_ctx)
	105	{
	106	uint64_t period = image_ctx.get_stripe_period();
	107	uint64_t new_num_periods = ((m_new_size + period - 1) / period);
11fdf7f2	108	m_delete_off = std::min(new_num_periods * period, original_size);
7c673cae FG	109	// first object we can delete free and clear
7c673cae FG	110	m_delete_start = new_num_periods * image_ctx.get_stripe_count();
3efd9988	111	m_delete_start_min = m_delete_start;
7c673cae FG	112	m_num_objects = Striper::get_num_objects(image_ctx.layout, original_size);
	113
	114	CephContext *cct = image_ctx.cct;
	115	ldout(cct, 10) << this << " trim image " << original_size << " -> "
	116	<< m_new_size << " periods " << new_num_periods
	117	<< " discard to offset " << m_delete_off
	118	<< " delete objects " << m_delete_start
	119	<< " to " << m_num_objects << dendl;
	120	}
	121
	122	template <typename I>
	123	bool TrimRequest<I>::should_complete(int r)
	124	{
	125	I &image_ctx = this->m_image_ctx;
	126	CephContext *cct = image_ctx.cct;
	127	ldout(cct, 5) << this << " should_complete: r=" << r << dendl;
	128	if (r == -ERESTART) {
	129	ldout(cct, 5) << "trim operation interrupted" << dendl;
	130	return true;
	131	} else if (r < 0) {
	132	lderr(cct) << "trim encountered an error: " << cpp_strerror(r) << dendl;
	133	return true;
	134	}
	135
	136	RWLock::RLocker owner_lock(image_ctx.owner_lock);
	137	switch (m_state) {
3efd9988 FG	138	case STATE_PRE_TRIM:
3efd9988 FG	139	ldout(cct, 5) << " PRE_TRIM" << dendl;
7c673cae FG	140	send_copyup_objects();
	141	break;
	142
	143	case STATE_COPYUP_OBJECTS:
	144	ldout(cct, 5) << " COPYUP_OBJECTS" << dendl;
7c673cae FG	145	send_remove_objects();
	146	break;
	147
	148	case STATE_REMOVE_OBJECTS:
	149	ldout(cct, 5) << " REMOVE_OBJECTS" << dendl;
3efd9988	150	send_post_trim();
7c673cae FG	151	break;
7c673cae FG	152
3efd9988 FG	153	case STATE_POST_TRIM:
3efd9988 FG	154	ldout(cct, 5) << " POST_TRIM" << dendl;
7c673cae FG	155	send_clean_boundary();
	156	break;
	157
	158	case STATE_CLEAN_BOUNDARY:
	159	ldout(cct, 5) << "CLEAN_BOUNDARY" << dendl;
	160	send_finish(0);
	161	break;
	162
	163	case STATE_FINISHED:
	164	ldout(cct, 5) << "FINISHED" << dendl;
	165	return true;
	166
	167	default:
	168	lderr(cct) << "invalid state: " << m_state << dendl;
11fdf7f2	169	ceph_abort();
7c673cae FG	170	break;
	171	}
	172	return false;
	173	}
	174
	175	template <typename I>
	176	void TrimRequest<I>::send() {
3efd9988	177	send_pre_trim();
7c673cae FG	178	}
	179
	180	template<typename I>
3efd9988	181	void TrimRequest<I>::send_pre_trim() {
7c673cae	182	I &image_ctx = this->m_image_ctx;
11fdf7f2	183	ceph_assert(image_ctx.owner_lock.is_locked());
7c673cae	184
3efd9988 FG	185	if (m_delete_start >= m_num_objects) {
	186	send_clean_boundary();
	187	return;
	188	}
7c673cae	189
7c673cae FG	190	{
7c673cae FG	191	RWLock::RLocker snap_locker(image_ctx.snap_lock);
3efd9988 FG	192	if (image_ctx.object_map != nullptr) {
	193	ldout(image_ctx.cct, 5) << this << " send_pre_trim: "
	194	<< " delete_start_min=" << m_delete_start_min
	195	<< " num_objects=" << m_num_objects << dendl;
	196	m_state = STATE_PRE_TRIM;
7c673cae	197
11fdf7f2	198	ceph_assert(image_ctx.exclusive_lock->is_lock_owner());
7c673cae	199
3efd9988 FG	200	RWLock::WLocker object_map_locker(image_ctx.object_map_lock);
	201	if (image_ctx.object_map->template aio_update<AsyncRequest<I> >(
	202	CEPH_NOSNAP, m_delete_start_min, m_num_objects, OBJECT_PENDING,
91327a77	203	OBJECT_EXISTS, {}, false, this)) {
3efd9988 FG	204	return;
	205	}
	206	}
	207	}
7c673cae	208
3efd9988	209	send_copyup_objects();
7c673cae FG	210	}
	211
	212	template<typename I>
3efd9988	213	void TrimRequest<I>::send_copyup_objects() {
7c673cae	214	I &image_ctx = this->m_image_ctx;
11fdf7f2	215	ceph_assert(image_ctx.owner_lock.is_locked());
7c673cae	216
3efd9988	217	::SnapContext snapc;
7c673cae FG	218	bool has_snapshots;
	219	uint64_t parent_overlap;
	220	{
	221	RWLock::RLocker snap_locker(image_ctx.snap_lock);
	222	RWLock::RLocker parent_locker(image_ctx.parent_lock);
	223
3efd9988	224	snapc = image_ctx.snapc;
7c673cae FG	225	has_snapshots = !image_ctx.snaps.empty();
7c673cae FG	226	int r = image_ctx.get_parent_overlap(CEPH_NOSNAP, &parent_overlap);
11fdf7f2	227	ceph_assert(r == 0);
7c673cae FG	228	}
	229
	230	// copyup is only required for portion of image that overlaps parent
3efd9988 FG	231	uint64_t copyup_end = Striper::get_num_objects(image_ctx.layout,
3efd9988 FG	232	parent_overlap);
7c673cae FG	233
	234	// TODO: protect against concurrent shrink and snap create?
	235	// skip to remove if no copyup is required.
3efd9988 FG	236	if (copyup_end <= m_delete_start \|\| !has_snapshots) {
3efd9988 FG	237	send_remove_objects();
7c673cae FG	238	return;
	239	}
	240
3efd9988 FG	241	uint64_t copyup_start = m_delete_start;
3efd9988 FG	242	m_delete_start = copyup_end;
7c673cae	243
3efd9988 FG	244	ldout(image_ctx.cct, 5) << this << " send_copyup_objects: "
	245	<< " start object=" << copyup_start << ", "
	246	<< " end object=" << copyup_end << dendl;
	247	m_state = STATE_COPYUP_OBJECTS;
7c673cae	248
3efd9988 FG	249	Context *ctx = this->create_callback_context();
	250	typename AsyncObjectThrottle<I>::ContextFactory context_factory(
	251	boost::lambda::bind(boost::lambda::new_ptr<C_CopyupObject<I> >(),
	252	boost::lambda::_1, &image_ctx, snapc, boost::lambda::_2));
	253	AsyncObjectThrottle<I> *throttle = new AsyncObjectThrottle<I>(
	254	this, image_ctx, context_factory, ctx, &m_prog_ctx, copyup_start,
	255	copyup_end);
11fdf7f2 TL	256	throttle->start_ops(
11fdf7f2 TL	257	image_ctx.config.template get_val<uint64_t>("rbd_concurrent_management_ops"));
7c673cae FG	258	}
	259
	260	template <typename I>
3efd9988	261	void TrimRequest<I>::send_remove_objects() {
7c673cae	262	I &image_ctx = this->m_image_ctx;
11fdf7f2	263	ceph_assert(image_ctx.owner_lock.is_locked());
7c673cae	264
3efd9988 FG	265	ldout(image_ctx.cct, 5) << this << " send_remove_objects: "
	266	<< " delete_start=" << m_delete_start
	267	<< " num_objects=" << m_num_objects << dendl;
	268	m_state = STATE_REMOVE_OBJECTS;
7c673cae	269
3efd9988 FG	270	Context *ctx = this->create_callback_context();
	271	typename AsyncObjectThrottle<I>::ContextFactory context_factory(
	272	boost::lambda::bind(boost::lambda::new_ptr<C_RemoveObject<I> >(),
	273	boost::lambda::_1, &image_ctx, boost::lambda::_2));
	274	AsyncObjectThrottle<I> *throttle = new AsyncObjectThrottle<I>(
	275	this, image_ctx, context_factory, ctx, &m_prog_ctx, m_delete_start,
	276	m_num_objects);
11fdf7f2 TL	277	throttle->start_ops(
11fdf7f2 TL	278	image_ctx.config.template get_val<uint64_t>("rbd_concurrent_management_ops"));
7c673cae FG	279	}
	280
	281	template<typename I>
3efd9988	282	void TrimRequest<I>::send_post_trim() {
7c673cae	283	I &image_ctx = this->m_image_ctx;
11fdf7f2	284	ceph_assert(image_ctx.owner_lock.is_locked());
7c673cae FG	285
	286	{
	287	RWLock::RLocker snap_locker(image_ctx.snap_lock);
	288	if (image_ctx.object_map != nullptr) {
3efd9988 FG	289	ldout(image_ctx.cct, 5) << this << " send_post_trim:"
	290	<< " delete_start_min=" << m_delete_start_min
	291	<< " num_objects=" << m_num_objects << dendl;
	292	m_state = STATE_POST_TRIM;
7c673cae	293
11fdf7f2	294	ceph_assert(image_ctx.exclusive_lock->is_lock_owner());
7c673cae	295
7c673cae FG	296	RWLock::WLocker object_map_locker(image_ctx.object_map_lock);
7c673cae FG	297	if (image_ctx.object_map->template aio_update<AsyncRequest<I> >(
3efd9988	298	CEPH_NOSNAP, m_delete_start_min, m_num_objects, OBJECT_NONEXISTENT,
91327a77	299	OBJECT_PENDING, {}, false, this)) {
7c673cae FG	300	return;
	301	}
	302	}
	303	}
	304
7c673cae FG	305	send_clean_boundary();
	306	}
	307
	308	template <typename I>
	309	void TrimRequest<I>::send_clean_boundary() {
	310	I &image_ctx = this->m_image_ctx;
11fdf7f2	311	ceph_assert(image_ctx.owner_lock.is_locked());
7c673cae FG	312	CephContext *cct = image_ctx.cct;
	313	if (m_delete_off <= m_new_size) {
	314	send_finish(0);
	315	return;
	316	}
	317
	318	// should have been canceled prior to releasing lock
11fdf7f2 TL	319	ceph_assert(image_ctx.exclusive_lock == nullptr \|\|
11fdf7f2 TL	320	image_ctx.exclusive_lock->is_lock_owner());
7c673cae FG	321	uint64_t delete_len = m_delete_off - m_new_size;
	322	ldout(image_ctx.cct, 5) << this << " send_clean_boundary: "
	323	<< " delete_off=" << m_delete_off
	324	<< " length=" << delete_len << dendl;
	325	m_state = STATE_CLEAN_BOUNDARY;
	326
	327	::SnapContext snapc;
	328	{
	329	RWLock::RLocker snap_locker(image_ctx.snap_lock);
	330	snapc = image_ctx.snapc;
	331	}
	332
	333	// discard the weird boundary
	334	std::vector<ObjectExtent> extents;
	335	Striper::file_to_extents(cct, image_ctx.format_string,
	336	&image_ctx.layout, m_new_size, delete_len, 0,
	337	extents);
	338
	339	ContextCompletion *completion =
	340	new ContextCompletion(this->create_async_callback_context(), true);
	341	for (vector<ObjectExtent>::iterator p = extents.begin();
	342	p != extents.end(); ++p) {
	343	ldout(cct, 20) << " ex " << *p << dendl;
	344	Context req_comp = new C_ContextCompletion(completion);
	345
7c673cae	346	if (p->offset == 0) {
b32b8144 FG	347	// treat as a full object delete on the boundary
b32b8144 FG	348	p->length = image_ctx.layout.object_size;
7c673cae	349	}
11fdf7f2 TL	350
	351	auto object_dispatch_spec = io::ObjectDispatchSpec::create_discard(
	352	&image_ctx, io::OBJECT_DISPATCH_LAYER_NONE, p->oid.name, p->objectno,
	353	p->offset, p->length, snapc, 0, 0, {}, req_comp);
	354	object_dispatch_spec->send();
7c673cae FG	355	}
	356	completion->finish_adding_requests();
	357	}
	358
	359	template <typename I>
	360	void TrimRequest<I>::send_finish(int r) {
	361	m_state = STATE_FINISHED;
	362	this->async_complete(r);
	363	}
	364
	365	} // namespace operation
	366	} // namespace librbd
	367
	368	template class librbd::operation::TrimRequest<librbd::ImageCtx>;