Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 310 insertions, 0 deletions

diff --git a/src/librbd/operation/ObjectMapIterate.cc b/src/librbd/operation/ObjectMapIterate.cc
new file mode 100644
index 00000000..66958416
--- /dev/null
+++ b/src/librbd/operation/ObjectMapIterate.cc
@@ -0,0 +1,310 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/operation/ObjectMapIterate.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/ImageWatcher.h"
+#include "librbd/internal.h"
+#include "librbd/ObjectMap.h"
+#include "librbd/operation/ResizeRequest.h"
+#include "librbd/object_map/InvalidateRequest.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::ObjectMapIterateRequest: "
+
+namespace librbd {
+namespace operation {
+
+namespace {
+
+template <typename I>
+class C_VerifyObjectCallback : public C_AsyncObjectThrottle<I> {
+public:
+  C_VerifyObjectCallback(AsyncObjectThrottle<I> &throttle, I *image_ctx,
+			 uint64_t snap_id, uint64_t object_no,
+			 ObjectIterateWork<I> handle_mismatch,
+			 std::atomic_flag *invalidate)
+    : C_AsyncObjectThrottle<I>(throttle, *image_ctx),
+    m_snap_id(snap_id), m_object_no(object_no),
+    m_oid(image_ctx->get_object_name(m_object_no)),
+    m_handle_mismatch(handle_mismatch),
+    m_invalidate(invalidate)
+  {
+    m_io_ctx.dup(image_ctx->data_ctx);
+    m_io_ctx.snap_set_read(CEPH_SNAPDIR);
+  }
+
+  void complete(int r) override {
+    I &image_ctx = this->m_image_ctx;
+    if (should_complete(r)) {
+      ldout(image_ctx.cct, 20) << m_oid << " C_VerifyObjectCallback completed "
+			       << dendl;
+      m_io_ctx.close();
+
+      this->finish(r);
+      delete this;
+    }
+  }
+
+  int send() override {
+    send_list_snaps();
+    return 0;
+  }
+
+private:
+  librados::IoCtx m_io_ctx;
+  uint64_t m_snap_id;
+  uint64_t m_object_no;
+  std::string m_oid;
+  ObjectIterateWork<I> m_handle_mismatch;
+  std::atomic_flag *m_invalidate;
+
+  librados::snap_set_t m_snap_set;
+  int m_snap_list_ret = 0;
+
+  bool should_complete(int r) {
+    I &image_ctx = this->m_image_ctx;
+    CephContext *cct = image_ctx.cct;
+    if (r == 0) {
+      r = m_snap_list_ret;
+    }
+    if (r < 0 && r != -ENOENT) {
+      lderr(cct) << m_oid << " C_VerifyObjectCallback::should_complete: "
+                 << "encountered an error: " << cpp_strerror(r) << dendl;
+      return true;
+    }
+
+    ldout(cct, 20) << m_oid << " C_VerifyObjectCallback::should_complete: "
+		   << " r="
+                   << r << dendl;
+    return object_map_action(get_object_state());
+  }
+
+  void send_list_snaps() {
+    I &image_ctx = this->m_image_ctx;
+    ceph_assert(image_ctx.owner_lock.is_locked());
+    ldout(image_ctx.cct, 5) << m_oid
+			    << " C_VerifyObjectCallback::send_list_snaps"
+                            << dendl;
+
+    librados::ObjectReadOperation op;
+    op.list_snaps(&m_snap_set, &m_snap_list_ret);
+
+    librados::AioCompletion *comp = util::create_rados_callback(this);
+    int r = m_io_ctx.aio_operate(m_oid, comp, &op, NULL);
+    ceph_assert(r == 0);
+    comp->release();
+  }
+
+  uint8_t get_object_state() {
+    I &image_ctx = this->m_image_ctx;
+    RWLock::RLocker snap_locker(image_ctx.snap_lock);
+    for (std::vector<librados::clone_info_t>::const_iterator r =
+           m_snap_set.clones.begin(); r != m_snap_set.clones.end(); ++r) {
+      librados::snap_t from_snap_id;
+      librados::snap_t to_snap_id;
+      if (r->cloneid == librados::SNAP_HEAD) {
+        from_snap_id = next_valid_snap_id(m_snap_set.seq + 1);
+        to_snap_id = librados::SNAP_HEAD;
+      } else {
+        from_snap_id = next_valid_snap_id(r->snaps[0]);
+        to_snap_id = r->snaps[r->snaps.size()-1];
+      }
+
+      if (to_snap_id < m_snap_id) {
+        continue;
+      } else if (m_snap_id < from_snap_id) {
+        break;
+      }
+
+      if ((image_ctx.features & RBD_FEATURE_FAST_DIFF) != 0 &&
+          from_snap_id != m_snap_id) {
+        return OBJECT_EXISTS_CLEAN;
+      }
+      return OBJECT_EXISTS;
+    }
+    return OBJECT_NONEXISTENT;
+  }
+
+  uint64_t next_valid_snap_id(uint64_t snap_id) {
+    I &image_ctx = this->m_image_ctx;
+    ceph_assert(image_ctx.snap_lock.is_locked());
+
+    std::map<librados::snap_t, SnapInfo>::iterator it =
+      image_ctx.snap_info.lower_bound(snap_id);
+    if (it == image_ctx.snap_info.end()) {
+      return CEPH_NOSNAP;
+    }
+    return it->first;
+  }
+
+  bool object_map_action(uint8_t new_state) {
+    I &image_ctx = this->m_image_ctx;
+    CephContext *cct = image_ctx.cct;
+    RWLock::RLocker owner_locker(image_ctx.owner_lock);
+
+    // should have been canceled prior to releasing lock
+    ceph_assert(image_ctx.exclusive_lock == nullptr ||
+                image_ctx.exclusive_lock->is_lock_owner());
+
+    RWLock::RLocker snap_locker(image_ctx.snap_lock);
+    ceph_assert(image_ctx.object_map != nullptr);
+
+    RWLock::WLocker l(image_ctx.object_map_lock);
+    uint8_t state = (*image_ctx.object_map)[m_object_no];
+
+    ldout(cct, 10) << "C_VerifyObjectCallback::object_map_action"
+		   << " object " << image_ctx.get_object_name(m_object_no)
+		   << " state " << (int)state
+		   << " new_state " << (int)new_state << dendl;
+
+    if (state != new_state) {
+      int r = 0;
+
+      ceph_assert(m_handle_mismatch);
+      r = m_handle_mismatch(image_ctx, m_object_no, state, new_state);
+      if (r) {
+	lderr(cct) << "object map error: object "
+		   << image_ctx.get_object_name(m_object_no)
+		   << " marked as " << (int)state << ", but should be "
+		   << (int)new_state << dendl;
+	m_invalidate->test_and_set();
+      } else {
+	ldout(cct, 1) << "object map inconsistent: object "
+		   << image_ctx.get_object_name(m_object_no)
+		   << " marked as " << (int)state << ", but should be "
+		   << (int)new_state << dendl;
+      }
+    }
+
+    return true;
+  }
+};
+
+} // anonymous namespace
+
+template <typename I>
+void ObjectMapIterateRequest<I>::send() {
+  if (!m_image_ctx.data_ctx.is_valid()) {
+    this->async_complete(-ENODEV);
+    return;
+  }
+
+  send_verify_objects();
+}
+
+template <typename I>
+bool ObjectMapIterateRequest<I>::should_complete(int r) {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 5) << this << " should_complete: " << " r=" << r << dendl;
+
+  if (r == -ENODEV) {
+    lderr(cct) << "missing data pool" << dendl;
+    return true;
+  }
+
+  if (r < 0) {
+    lderr(cct) << "object map operation encountered an error: "
+	       << cpp_strerror(r) << dendl;
+  }
+
+  RWLock::RLocker owner_lock(m_image_ctx.owner_lock);
+  switch (m_state) {
+  case STATE_VERIFY_OBJECTS:
+    if (m_invalidate.test_and_set()) {
+      send_invalidate_object_map();
+      return false;
+    } else if (r == 0) {
+      return true;
+    }
+    break;
+
+  case STATE_INVALIDATE_OBJECT_MAP:
+    if (r == 0) {
+      return true;
+    }
+    break;
+
+  default:
+    ceph_abort();
+    break;
+  }
+
+  if (r < 0) {
+    return true;
+  }
+
+  return false;
+}
+
+template <typename I>
+void ObjectMapIterateRequest<I>::send_verify_objects() {
+  ceph_assert(m_image_ctx.owner_lock.is_locked());
+  CephContext *cct = m_image_ctx.cct;
+
+  uint64_t snap_id;
+  uint64_t num_objects;
+  {
+    RWLock::RLocker l(m_image_ctx.snap_lock);
+    snap_id = m_image_ctx.snap_id;
+    num_objects = Striper::get_num_objects(m_image_ctx.layout,
+                                           m_image_ctx.get_image_size(snap_id));
+  }
+  ldout(cct, 5) << this << " send_verify_objects" << dendl;
+
+  m_state = STATE_VERIFY_OBJECTS;
+
+  typename AsyncObjectThrottle<I>::ContextFactory context_factory(
+    boost::lambda::bind(boost::lambda::new_ptr<C_VerifyObjectCallback<I> >(),
+			boost::lambda::_1, &m_image_ctx, snap_id,
+			boost::lambda::_2, m_handle_mismatch, &m_invalidate));
+  AsyncObjectThrottle<I> *throttle = new AsyncObjectThrottle<I>(
+    this, m_image_ctx, context_factory, this->create_callback_context(),
+    &m_prog_ctx, 0, num_objects);
+  throttle->start_ops(
+    m_image_ctx.config.template get_val<uint64_t>("rbd_concurrent_management_ops"));
+}
+
+template <typename I>
+uint64_t ObjectMapIterateRequest<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);
+}
+
+template <typename I>
+void ObjectMapIterateRequest<I>::send_invalidate_object_map() {
+  CephContext *cct = m_image_ctx.cct;
+
+  ldout(cct, 5) << this << " send_invalidate_object_map" << dendl;
+  m_state = STATE_INVALIDATE_OBJECT_MAP;
+
+  object_map::InvalidateRequest<I>*req =
+    object_map::InvalidateRequest<I>::create(m_image_ctx, m_image_ctx.snap_id,
+					     true,
+					     this->create_callback_context());
+
+  ceph_assert(m_image_ctx.owner_lock.is_locked());
+  RWLock::WLocker snap_locker(m_image_ctx.snap_lock);
+  req->send();
+}
+
+} // namespace operation
+} // namespace librbd
+
+template class librbd::operation::ObjectMapIterateRequest<librbd::ImageCtx>;