X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Flibrbd%2Fimage%2FOpenRequest.cc;fp=src%2Fceph%2Fsrc%2Flibrbd%2Fimage%2FOpenRequest.cc;h=a78778af636271eebc8ef74ade04c7015262ba28;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/librbd/image/OpenRequest.cc b/src/ceph/src/librbd/image/OpenRequest.cc
new file mode 100644
index 0000000..a78778a
--- /dev/null
+++ b/src/ceph/src/librbd/image/OpenRequest.cc
@@ -0,0 +1,599 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/image/OpenRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "cls/rbd/cls_rbd_client.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/Utils.h"
+#include "librbd/image/CloseRequest.h"
+#include "librbd/image/RefreshRequest.h"
+#include "librbd/image/SetSnapRequest.h"
+#include <boost/algorithm/string/predicate.hpp>
+#include "include/assert.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::image::OpenRequest: "
+
+namespace librbd {
+namespace image {
+
+namespace {
+
+static uint64_t MAX_METADATA_ITEMS = 128;
+
+}
+
+using util::create_context_callback;
+using util::create_rados_callback;
+
+template <typename I>
+OpenRequest<I>::OpenRequest(I *image_ctx, bool skip_open_parent,
+                            Context *on_finish)
+  : m_image_ctx(image_ctx), m_skip_open_parent_image(skip_open_parent),
+    m_on_finish(on_finish), m_error_result(0),
+    m_last_metadata_key(ImageCtx::METADATA_CONF_PREFIX) {
+}
+
+template <typename I>
+void OpenRequest<I>::send() {
+  send_v2_detect_header();
+}
+
+template <typename I>
+void OpenRequest<I>::send_v1_detect_header() {
+  librados::ObjectReadOperation op;
+  op.stat(NULL, NULL, NULL);
+
+  using klass = OpenRequest<I>;
+  librados::AioCompletion *comp =
+    create_rados_callback<klass, &klass::handle_v1_detect_header>(this);
+  m_out_bl.clear();
+  m_image_ctx->md_ctx.aio_operate(util::old_header_name(m_image_ctx->name),
+                                 comp, &op, &m_out_bl);
+  comp->release();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v1_detect_header(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    if (*result != -ENOENT) {
+      lderr(cct) << "failed to stat image header: " << cpp_strerror(*result)
+                 << dendl;
+    }
+    send_close_image(*result);
+  } else {
+    ldout(cct, 1) << "RBD image format 1 is deprecated. "
+                  << "Please copy this image to image format 2." << dendl;
+
+    m_image_ctx->old_format = true;
+    m_image_ctx->header_oid = util::old_header_name(m_image_ctx->name);
+    m_image_ctx->apply_metadata({});
+
+    send_register_watch();
+  }
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_v2_detect_header() {
+  if (m_image_ctx->id.empty()) {
+    CephContext *cct = m_image_ctx->cct;
+    ldout(cct, 10) << this << " " << __func__ << dendl;
+
+    librados::ObjectReadOperation op;
+    op.stat(NULL, NULL, NULL);
+
+    using klass = OpenRequest<I>;
+    librados::AioCompletion *comp =
+      create_rados_callback<klass, &klass::handle_v2_detect_header>(this);
+    m_out_bl.clear();
+    m_image_ctx->md_ctx.aio_operate(util::id_obj_name(m_image_ctx->name),
+                                   comp, &op, &m_out_bl);
+    comp->release();
+  } else {
+    send_v2_get_name();
+  }
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v2_detect_header(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  if (*result == -ENOENT) {
+    send_v1_detect_header();
+  } else if (*result < 0) {
+    lderr(cct) << "failed to stat v2 image header: " << cpp_strerror(*result)
+               << dendl;
+    send_close_image(*result);
+  } else {
+    m_image_ctx->old_format = false;
+    send_v2_get_id();
+  }
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_v2_get_id() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::get_id_start(&op);
+
+  using klass = OpenRequest<I>;
+  librados::AioCompletion *comp =
+    create_rados_callback<klass, &klass::handle_v2_get_id>(this);
+  m_out_bl.clear();
+  m_image_ctx->md_ctx.aio_operate(util::id_obj_name(m_image_ctx->name),
+                                  comp, &op, &m_out_bl);
+  comp->release();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v2_get_id(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  if (*result == 0) {
+    bufferlist::iterator it = m_out_bl.begin();
+    *result = cls_client::get_id_finish(&it, &m_image_ctx->id);
+  }
+  if (*result < 0) {
+    lderr(cct) << "failed to retrieve image id: " << cpp_strerror(*result)
+               << dendl;
+    send_close_image(*result);
+  } else {
+    send_v2_get_immutable_metadata();
+  }
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_v2_get_name() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::dir_get_name_start(&op, m_image_ctx->id);
+
+  using klass = OpenRequest<I>;
+  librados::AioCompletion *comp = create_rados_callback<
+    klass, &klass::handle_v2_get_name>(this);
+  m_out_bl.clear();
+  m_image_ctx->md_ctx.aio_operate(RBD_DIRECTORY, comp, &op, &m_out_bl);
+  comp->release();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v2_get_name(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  if (*result == 0) {
+    bufferlist::iterator it = m_out_bl.begin();
+    *result = cls_client::dir_get_name_finish(&it, &m_image_ctx->name);
+  }
+  if (*result < 0 && *result != -ENOENT) {
+    lderr(cct) << "failed to retreive name: "
+               << cpp_strerror(*result) << dendl;
+    send_close_image(*result);
+  } else if (*result == -ENOENT) {
+    // image does not exist in directory, look in the trash bin
+    ldout(cct, 10) << "image id " << m_image_ctx->id << " does not exist in "
+                   << "rbd directory, searching in rbd trash..." << dendl;
+    send_v2_get_name_from_trash();
+  } else {
+    send_v2_get_immutable_metadata();
+  }
+
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_v2_get_name_from_trash() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::trash_get_start(&op, m_image_ctx->id);
+
+  using klass = OpenRequest<I>;
+  librados::AioCompletion *comp = create_rados_callback<
+    klass, &klass::handle_v2_get_name_from_trash>(this);
+  m_out_bl.clear();
+  m_image_ctx->md_ctx.aio_operate(RBD_TRASH, comp, &op, &m_out_bl);
+  comp->release();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v2_get_name_from_trash(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  cls::rbd::TrashImageSpec trash_spec;
+  if (*result == 0) {
+    bufferlist::iterator it = m_out_bl.begin();
+    *result = cls_client::trash_get_finish(&it, &trash_spec);
+    m_image_ctx->name = trash_spec.name;
+  }
+  if (*result < 0) {
+    if (*result == -EOPNOTSUPP) {
+      *result = -ENOENT;
+    }
+    if (*result == -ENOENT) {
+      ldout(cct, 5) << "failed to retrieve name for image id "
+                    << m_image_ctx->id << dendl;
+    } else {
+      lderr(cct) << "failed to retreive name from trash: "
+                 << cpp_strerror(*result) << dendl;
+    }
+    send_close_image(*result);
+  } else {
+    send_v2_get_immutable_metadata();
+  }
+
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_v2_get_immutable_metadata() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  m_image_ctx->old_format = false;
+  m_image_ctx->header_oid = util::header_name(m_image_ctx->id);
+
+  librados::ObjectReadOperation op;
+  cls_client::get_immutable_metadata_start(&op);
+
+  using klass = OpenRequest<I>;
+  librados::AioCompletion *comp = create_rados_callback<
+    klass, &klass::handle_v2_get_immutable_metadata>(this);
+  m_out_bl.clear();
+  m_image_ctx->md_ctx.aio_operate(m_image_ctx->header_oid, comp, &op,
+                                  &m_out_bl);
+  comp->release();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v2_get_immutable_metadata(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  if (*result == 0) {
+    bufferlist::iterator it = m_out_bl.begin();
+    *result = cls_client::get_immutable_metadata_finish(
+      &it, &m_image_ctx->object_prefix, &m_image_ctx->order);
+  }
+  if (*result < 0) {
+    lderr(cct) << "failed to retreive immutable metadata: "
+               << cpp_strerror(*result) << dendl;
+    send_close_image(*result);
+  } else {
+    send_v2_get_stripe_unit_count();
+  }
+
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_v2_get_stripe_unit_count() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::get_stripe_unit_count_start(&op);
+
+  using klass = OpenRequest<I>;
+  librados::AioCompletion *comp = create_rados_callback<
+    klass, &klass::handle_v2_get_stripe_unit_count>(this);
+  m_out_bl.clear();
+  m_image_ctx->md_ctx.aio_operate(m_image_ctx->header_oid, comp, &op,
+                                  &m_out_bl);
+  comp->release();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v2_get_stripe_unit_count(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  if (*result == 0) {
+    bufferlist::iterator it = m_out_bl.begin();
+    *result = cls_client::get_stripe_unit_count_finish(
+      &it, &m_image_ctx->stripe_unit, &m_image_ctx->stripe_count);
+  }
+
+  if (*result == -ENOEXEC || *result == -EINVAL) {
+    *result = 0;
+  }
+
+  if (*result < 0) {
+    lderr(cct) << "failed to read striping metadata: " << cpp_strerror(*result)
+               << dendl;
+    send_close_image(*result);
+    return nullptr;
+  }
+
+  send_v2_get_create_timestamp();
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_v2_get_create_timestamp() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::get_create_timestamp_start(&op);
+
+  using klass = OpenRequest<I>;
+  librados::AioCompletion *comp = create_rados_callback<
+    klass, &klass::handle_v2_get_create_timestamp>(this);
+  m_out_bl.clear();
+  m_image_ctx->md_ctx.aio_operate(m_image_ctx->header_oid, comp, &op,
+                                  &m_out_bl);
+  comp->release();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v2_get_create_timestamp(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl;
+
+  if (*result == 0) {
+    bufferlist::iterator it = m_out_bl.begin();
+    *result = cls_client::get_create_timestamp_finish(&it,
+        &m_image_ctx->create_timestamp);
+  }
+  if (*result < 0 && *result != -EOPNOTSUPP) {
+    lderr(cct) << "failed to retrieve create_timestamp: "
+               << cpp_strerror(*result)
+               << dendl;
+    send_close_image(*result);
+    return nullptr;
+  }
+
+  send_v2_get_data_pool();
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_v2_get_data_pool() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::get_data_pool_start(&op);
+
+  using klass = OpenRequest<I>;
+  librados::AioCompletion *comp = create_rados_callback<
+    klass, &klass::handle_v2_get_data_pool>(this);
+  m_out_bl.clear();
+  m_image_ctx->md_ctx.aio_operate(m_image_ctx->header_oid, comp, &op,
+                                  &m_out_bl);
+  comp->release();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v2_get_data_pool(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl;
+
+  int64_t data_pool_id = -1;
+  if (*result == 0) {
+    bufferlist::iterator it = m_out_bl.begin();
+    *result = cls_client::get_data_pool_finish(&it, &data_pool_id);
+  } else if (*result == -EOPNOTSUPP) {
+    *result = 0;
+  }
+
+  if (*result < 0) {
+    lderr(cct) << "failed to read data pool: " << cpp_strerror(*result)
+               << dendl;
+    send_close_image(*result);
+    return nullptr;
+  }
+
+  if (data_pool_id != -1) {
+    librados::Rados rados(m_image_ctx->md_ctx);
+    *result = rados.ioctx_create2(data_pool_id, m_image_ctx->data_ctx);
+    if (*result < 0) {
+      lderr(cct) << "failed to initialize data pool IO context: "
+                 << cpp_strerror(*result) << dendl;
+      send_close_image(*result);
+      return nullptr;
+    }
+  }
+
+  m_image_ctx->init_layout();
+  send_v2_apply_metadata();
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_v2_apply_metadata() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << ": "
+                 << "start_key=" << m_last_metadata_key << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::metadata_list_start(&op, m_last_metadata_key, MAX_METADATA_ITEMS);
+
+  using klass = OpenRequest<I>;
+  librados::AioCompletion *comp =
+    create_rados_callback<klass, &klass::handle_v2_apply_metadata>(this);
+  m_out_bl.clear();
+  m_image_ctx->md_ctx.aio_operate(m_image_ctx->header_oid, comp, &op,
+                                  &m_out_bl);
+  comp->release();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_v2_apply_metadata(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl;
+
+  std::map<std::string, bufferlist> metadata;
+  if (*result == 0) {
+    bufferlist::iterator it = m_out_bl.begin();
+    *result = cls_client::metadata_list_finish(&it, &metadata);
+  }
+
+  if (*result == -EOPNOTSUPP || *result == -EIO) {
+    ldout(cct, 10) << "config metadata not supported by OSD" << dendl;
+  } else if (*result < 0) {
+    lderr(cct) << "failed to retrieve metadata: " << cpp_strerror(*result)
+               << dendl;
+    send_close_image(*result);
+    return nullptr;
+  }
+
+  if (!metadata.empty()) {
+    m_metadata.insert(metadata.begin(), metadata.end());
+    m_last_metadata_key = metadata.rbegin()->first;
+    if (boost::starts_with(m_last_metadata_key,
+                           ImageCtx::METADATA_CONF_PREFIX)) {
+      send_v2_apply_metadata();
+      return nullptr;
+    }
+  }
+
+  m_image_ctx->apply_metadata(m_metadata);
+
+  send_register_watch();
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_register_watch() {
+  m_image_ctx->init();
+
+  if (m_image_ctx->read_only) {
+    send_refresh();
+    return;
+  }
+
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  using klass = OpenRequest<I>;
+  Context *ctx = create_context_callback<
+    klass, &klass::handle_register_watch>(this);
+  m_image_ctx->register_watch(ctx);
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_register_watch(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    lderr(cct) << "failed to register watch: " << cpp_strerror(*result)
+               << dendl;
+    send_close_image(*result);
+  } else {
+    send_refresh();
+  }
+  return nullptr;
+}
+
+template <typename I>
+void OpenRequest<I>::send_refresh() {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  using klass = OpenRequest<I>;
+  RefreshRequest<I> *req = RefreshRequest<I>::create(
+    *m_image_ctx, false, m_skip_open_parent_image,
+    create_context_callback<klass, &klass::handle_refresh>(this));
+  req->send();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_refresh(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    lderr(cct) << "failed to refresh image: " << cpp_strerror(*result)
+               << dendl;
+    send_close_image(*result);
+    return nullptr;
+  } else {
+    return send_set_snap(result);
+  }
+}
+
+template <typename I>
+Context *OpenRequest<I>::send_set_snap(int *result) {
+  if (m_image_ctx->snap_name.empty()) {
+    *result = 0;
+    return m_on_finish;
+  }
+
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  using klass = OpenRequest<I>;
+  SetSnapRequest<I> *req = SetSnapRequest<I>::create(
+    *m_image_ctx, m_image_ctx->snap_namespace, m_image_ctx->snap_name,
+    create_context_callback<klass, &klass::handle_set_snap>(this));
+  req->send();
+  return nullptr;
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_set_snap(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    lderr(cct) << "failed to set image snapshot: " << cpp_strerror(*result)
+               << dendl;
+    send_close_image(*result);
+    return nullptr;
+  }
+
+  return m_on_finish;
+}
+
+template <typename I>
+void OpenRequest<I>::send_close_image(int error_result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << this << " " << __func__ << dendl;
+
+  m_error_result = error_result;
+
+  using klass = OpenRequest<I>;
+  Context *ctx = create_context_callback<klass, &klass::handle_close_image>(
+    this);
+  CloseRequest<I> *req = CloseRequest<I>::create(m_image_ctx, ctx);
+  req->send();
+}
+
+template <typename I>
+Context *OpenRequest<I>::handle_close_image(int *result) {
+  CephContext *cct = m_image_ctx->cct;
+  ldout(cct, 10) << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    lderr(cct) << "failed to close image: " << cpp_strerror(*result) << dendl;
+  }
+  if (m_error_result < 0) {
+    *result = m_error_result;
+  }
+  return m_on_finish;
+}
+
+} // namespace image
+} // namespace librbd
+
+template class librbd::image::OpenRequest<librbd::ImageCtx>;