X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Ftest%2Flibrados_test_stub%2FTestMemIoCtxImpl.cc;fp=src%2Fceph%2Fsrc%2Ftest%2Flibrados_test_stub%2FTestMemIoCtxImpl.cc;h=0000000000000000000000000000000000000000;hb=7da45d65be36d36b880cc55c5036e96c24b53f00;hp=cccbe820596317ec2c1aa139e1494b9d9fd60c5b;hpb=691462d09d0987b47e112d6ee8740375df3c51b2;p=stor4nfv.git

diff --git a/src/ceph/src/test/librados_test_stub/TestMemIoCtxImpl.cc b/src/ceph/src/test/librados_test_stub/TestMemIoCtxImpl.cc
deleted file mode 100644
index cccbe82..0000000
--- a/src/ceph/src/test/librados_test_stub/TestMemIoCtxImpl.cc
+++ /dev/null
@@ -1,788 +0,0 @@
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#include "test/librados_test_stub/TestMemIoCtxImpl.h"
-#include "test/librados_test_stub/TestMemRadosClient.h"
-#include "common/Clock.h"
-#include "common/RWLock.h"
-#include "include/err.h"
-#include <boost/algorithm/string/predicate.hpp>
-#include <boost/bind.hpp>
-#include <errno.h>
-#include <include/compat.h>
-
-static void to_vector(const interval_set<uint64_t> &set,
-                      std::vector<std::pair<uint64_t, uint64_t> > *vec) {
-  vec->clear();
-  for (interval_set<uint64_t>::const_iterator it = set.begin();
-      it != set.end(); ++it) {
-    vec->push_back(*it);
-  }
-}
-
-namespace librados {
-
-TestMemIoCtxImpl::TestMemIoCtxImpl() {
-}
-
-TestMemIoCtxImpl::TestMemIoCtxImpl(const TestMemIoCtxImpl& rhs)
-    : TestIoCtxImpl(rhs), m_client(rhs.m_client), m_pool(rhs.m_pool) {
-  m_pool->get();
-}
-
-TestMemIoCtxImpl::TestMemIoCtxImpl(TestMemRadosClient *client, int64_t pool_id,
-                                   const std::string& pool_name,
-                                   TestMemCluster::Pool *pool)
-    : TestIoCtxImpl(client, pool_id, pool_name), m_client(client),
-      m_pool(pool) {
-  m_pool->get();
-}
-
-TestMemIoCtxImpl::~TestMemIoCtxImpl() {
-  m_pool->put();
-}
-
-TestIoCtxImpl *TestMemIoCtxImpl::clone() {
-  return new TestMemIoCtxImpl(*this);
-}
-
-int TestMemIoCtxImpl::aio_remove(const std::string& oid, AioCompletionImpl *c) {
-  m_client->add_aio_operation(oid, true,
-                              boost::bind(&TestMemIoCtxImpl::remove, this, oid,
-                                          get_snap_context()),
-                              c);
-  return 0;
-}
-
-int TestMemIoCtxImpl::append(const std::string& oid, const bufferlist &bl,
-                             const SnapContext &snapc) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::WLocker l(m_pool->file_lock);
-    file = get_file(oid, true, snapc);
-  }
-
-  RWLock::WLocker l(file->lock);
-  file->data.append(bl);
-  return 0;
-}
-
-int TestMemIoCtxImpl::assert_exists(const std::string &oid) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  RWLock::RLocker l(m_pool->file_lock);
-  TestMemCluster::SharedFile file = get_file(oid, false, get_snap_context());
-  if (file == NULL) {
-    return -ENOENT;
-  }
-  return 0;
-}
-
-int TestMemIoCtxImpl::create(const std::string& oid, bool exclusive) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  RWLock::WLocker l(m_pool->file_lock);
-  get_file(oid, true, get_snap_context());
-  return 0;
-}
-
-int TestMemIoCtxImpl::list_snaps(const std::string& oid, snap_set_t *out_snaps) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  out_snaps->seq = 0;
-  out_snaps->clones.clear();
-
-  RWLock::RLocker l(m_pool->file_lock);
-  TestMemCluster::Files::iterator it = m_pool->files.find(oid);
-  if (it == m_pool->files.end()) {
-    return -ENOENT;
-  }
-
-  bool include_head = false;
-  TestMemCluster::FileSnapshots &file_snaps = it->second;
-  for (TestMemCluster::FileSnapshots::iterator s_it = file_snaps.begin();
-       s_it != file_snaps.end(); ++s_it) {
-    TestMemCluster::File &file = *s_it->get();
-
-    if (file_snaps.size() > 1) {
-      out_snaps->seq = file.snap_id;
-      TestMemCluster::FileSnapshots::iterator next_it(s_it);
-      ++next_it;
-      if (next_it == file_snaps.end()) {
-        include_head = true;
-        break;
-      }
-
-      ++out_snaps->seq;
-      if (!file.exists) {
-        continue;
-      }
-
-      // update the overlap with the next version's overlap metadata
-      TestMemCluster::File &next_file = *next_it->get();
-      interval_set<uint64_t> overlap;
-      if (next_file.exists) {
-        overlap = next_file.snap_overlap;
-      }
-
-      clone_info_t clone;
-      clone.cloneid = file.snap_id;
-      clone.snaps = file.snaps;
-      to_vector(overlap, &clone.overlap);
-      clone.size = file.data.length();
-      out_snaps->clones.push_back(clone);
-    }
-  }
-
-  if ((file_snaps.size() == 1 && file_snaps.back()->data.length() > 0) ||
-      include_head)
-  {
-    // Include the SNAP_HEAD
-    TestMemCluster::File &file = *file_snaps.back();
-    if (file.exists) {
-      RWLock::RLocker l2(file.lock);
-      if (out_snaps->seq == 0 && !include_head) {
-        out_snaps->seq = file.snap_id;
-      }
-      clone_info_t head_clone;
-      head_clone.cloneid = librados::SNAP_HEAD;
-      head_clone.size = file.data.length();
-      out_snaps->clones.push_back(head_clone);
-    }
-  }
-  return 0;
-
-}
-
-int TestMemIoCtxImpl::omap_get_vals2(const std::string& oid,
-                                    const std::string& start_after,
-                                    const std::string &filter_prefix,
-                                    uint64_t max_return,
-                                    std::map<std::string, bufferlist> *out_vals,
-                                    bool *pmore) {
-  if (out_vals == NULL) {
-    return -EINVAL;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::RLocker l(m_pool->file_lock);
-    file = get_file(oid, false, get_snap_context());
-    if (file == NULL) {
-      return -ENOENT;
-    }
-  }
-
-  out_vals->clear();
-
-  RWLock::RLocker l(file->lock);
-  TestMemCluster::FileOMaps::iterator o_it = m_pool->file_omaps.find(oid);
-  if (o_it == m_pool->file_omaps.end()) {
-    if (pmore) {
-      *pmore = false;
-    }
-    return 0;
-  }
-
-  TestMemCluster::OMap &omap = o_it->second;
-  TestMemCluster::OMap::iterator it = omap.begin();
-  if (!start_after.empty()) {
-    it = omap.upper_bound(start_after);
-  }
-
-  while (it != omap.end() && max_return > 0) {
-    if (filter_prefix.empty() ||
-        boost::algorithm::starts_with(it->first, filter_prefix)) {
-      (*out_vals)[it->first] = it->second;
-      --max_return;
-    }
-    ++it;
-  }
-  if (pmore) {
-    *pmore = (it != omap.end());
-  }
-  return 0;
-}
-
-int TestMemIoCtxImpl::omap_get_vals(const std::string& oid,
-                                    const std::string& start_after,
-                                    const std::string &filter_prefix,
-                                    uint64_t max_return,
-                                    std::map<std::string, bufferlist> *out_vals) {
-  return omap_get_vals2(oid, start_after, filter_prefix, max_return, out_vals, nullptr);
-}
-
-int TestMemIoCtxImpl::omap_rm_keys(const std::string& oid,
-                                   const std::set<std::string>& keys) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::WLocker l(m_pool->file_lock);
-    file = get_file(oid, true, get_snap_context());
-    if (file == NULL) {
-      return -ENOENT;
-    }
-  }
-
-  RWLock::WLocker l(file->lock);
-  for (std::set<std::string>::iterator it = keys.begin();
-       it != keys.end(); ++it) {
-    m_pool->file_omaps[oid].erase(*it);
-  }
-  return 0;
-}
-
-int TestMemIoCtxImpl::omap_set(const std::string& oid,
-                               const std::map<std::string, bufferlist> &map) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::WLocker l(m_pool->file_lock);
-    file = get_file(oid, true, get_snap_context());
-    if (file == NULL) {
-      return -ENOENT;
-    }
-  }
-
-  RWLock::WLocker l(file->lock);
-  for (std::map<std::string, bufferlist>::const_iterator it = map.begin();
-      it != map.end(); ++it) {
-    bufferlist bl;
-    bl.append(it->second);
-    m_pool->file_omaps[oid][it->first] = bl;
-  }
-
-  return 0;
-}
-
-int TestMemIoCtxImpl::read(const std::string& oid, size_t len, uint64_t off,
-                           bufferlist *bl) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::RLocker l(m_pool->file_lock);
-    file = get_file(oid, false, get_snap_context());
-    if (file == NULL) {
-      return -ENOENT;
-    }
-  }
-
-  RWLock::RLocker l(file->lock);
-  if (len == 0) {
-    len = file->data.length();
-  }
-  len = clip_io(off, len, file->data.length());
-  if (bl != NULL && len > 0) {
-    bufferlist bit;
-    bit.substr_of(file->data, off, len);
-    append_clone(bit, bl);
-  }
-  return len;
-}
-
-int TestMemIoCtxImpl::remove(const std::string& oid, const SnapContext &snapc) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  RWLock::WLocker l(m_pool->file_lock);
-  TestMemCluster::SharedFile file = get_file(oid, false, snapc);
-  if (file == NULL) {
-    return -ENOENT;
-  }
-  file = get_file(oid, true, snapc);
-
-  RWLock::WLocker l2(file->lock);
-  file->exists = false;
-
-  TestMemCluster::Files::iterator it = m_pool->files.find(oid);
-  assert(it != m_pool->files.end());
-  if (it->second.size() == 1) {
-    m_pool->files.erase(it);
-    m_pool->file_omaps.erase(oid);
-  }
-  return 0;
-}
-
-int TestMemIoCtxImpl::selfmanaged_snap_create(uint64_t *snapid) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  RWLock::WLocker l(m_pool->file_lock);
-  *snapid = ++m_pool->snap_id;
-  m_pool->snap_seqs.insert(*snapid);
-  return 0;
-}
-
-int TestMemIoCtxImpl::selfmanaged_snap_remove(uint64_t snapid) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  RWLock::WLocker l(m_pool->file_lock);
-  TestMemCluster::SnapSeqs::iterator it =
-    m_pool->snap_seqs.find(snapid);
-  if (it == m_pool->snap_seqs.end()) {
-    return -ENOENT;
-  }
-
-  // TODO clean up all file snapshots
-  m_pool->snap_seqs.erase(it);
-  return 0;
-}
-
-int TestMemIoCtxImpl::selfmanaged_snap_rollback(const std::string& oid,
-                                                uint64_t snapid) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  RWLock::WLocker l(m_pool->file_lock);
-
-  TestMemCluster::SharedFile file;
-  TestMemCluster::Files::iterator f_it = m_pool->files.find(oid);
-  if (f_it == m_pool->files.end()) {
-    return 0;
-  }
-
-  TestMemCluster::FileSnapshots &snaps = f_it->second;
-  file = snaps.back();
-
-  size_t versions = 0;
-  for (TestMemCluster::FileSnapshots::reverse_iterator it = snaps.rbegin();
-      it != snaps.rend(); ++it) {
-    TestMemCluster::SharedFile file = *it;
-    if (file->snap_id < get_snap_read()) {
-      if (versions == 0) {
-        // already at the snapshot version
-        return 0;
-      } else if (file->snap_id == CEPH_NOSNAP) {
-        if (versions == 1) {
-          // delete it current HEAD, next one is correct version
-          snaps.erase(it.base());
-        } else {
-          // overwrite contents of current HEAD
-          file = TestMemCluster::SharedFile (new TestMemCluster::File(**it));
-          file->snap_id = CEPH_NOSNAP;
-          *it = file;
-        }
-      } else {
-        // create new head version
-        file = TestMemCluster::SharedFile (new TestMemCluster::File(**it));
-        file->snap_id = m_pool->snap_id;
-        snaps.push_back(file);
-      }
-      return 0;
-    }
-    ++versions;
-  }
-  return 0;
-}
-
-int TestMemIoCtxImpl::sparse_read(const std::string& oid, uint64_t off,
-                                  uint64_t len,
-                                  std::map<uint64_t,uint64_t> *m,
-                                  bufferlist *data_bl) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  // TODO verify correctness
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::RLocker l(m_pool->file_lock);
-    file = get_file(oid, false, get_snap_context());
-    if (file == NULL) {
-      return -ENOENT;
-    }
-  }
-
-  RWLock::RLocker l(file->lock);
-  len = clip_io(off, len, file->data.length());
-  if (m != NULL) {
-    m->clear();
-    if (len > 0) {
-      (*m)[off] = len;
-    }
-  }
-  if (data_bl != NULL && len > 0) {
-    bufferlist bit;
-    bit.substr_of(file->data, off, len);
-    append_clone(bit, data_bl);
-  }
-  return 0;
-}
-
-int TestMemIoCtxImpl::stat(const std::string& oid, uint64_t *psize,
-                           time_t *pmtime) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::RLocker l(m_pool->file_lock);
-    file = get_file(oid, false, get_snap_context());
-    if (file == NULL) {
-      return -ENOENT;
-    }
-  }
-
-  RWLock::RLocker l(file->lock);
-  if (psize != NULL) {
-    *psize = file->data.length();
-  }
-  if (pmtime != NULL) {
-    *pmtime = file->mtime;
-  }
-  return 0;
-}
-
-int TestMemIoCtxImpl::truncate(const std::string& oid, uint64_t size,
-                               const SnapContext &snapc) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::WLocker l(m_pool->file_lock);
-    file = get_file(oid, true, snapc);
-  }
-
-  RWLock::WLocker l(file->lock);
-  bufferlist bl(size);
-
-  interval_set<uint64_t> is;
-  if (file->data.length() > size) {
-    is.insert(size, file->data.length() - size);
-
-    bl.substr_of(file->data, 0, size);
-    file->data.swap(bl);
-  } else if (file->data.length() != size) {
-    if (size == 0) {
-      bl.clear();
-    } else {
-      is.insert(0, size);
-
-      bl.append_zero(size - file->data.length());
-      file->data.append(bl);
-    }
-  }
-  is.intersection_of(file->snap_overlap);
-  file->snap_overlap.subtract(is);
-  return 0;
-}
-
-int TestMemIoCtxImpl::write(const std::string& oid, bufferlist& bl, size_t len,
-                            uint64_t off, const SnapContext &snapc) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::WLocker l(m_pool->file_lock);
-    file = get_file(oid, true, snapc);
-  }
-
-  RWLock::WLocker l(file->lock);
-  if (len > 0) {
-    interval_set<uint64_t> is;
-    is.insert(off, len);
-    is.intersection_of(file->snap_overlap);
-    file->snap_overlap.subtract(is);
-  }
-
-  ensure_minimum_length(off + len, &file->data);
-  file->data.copy_in(off, len, bl);
-  return 0;
-}
-
-int TestMemIoCtxImpl::write_full(const std::string& oid, bufferlist& bl,
-                                 const SnapContext &snapc) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::WLocker l(m_pool->file_lock);
-    file = get_file(oid, true, snapc);
-    if (file == NULL) {
-      return -ENOENT;
-    }
-  }
-
-  RWLock::WLocker l(file->lock);
-  if (bl.length() > 0) {
-    interval_set<uint64_t> is;
-    is.insert(0, bl.length());
-    is.intersection_of(file->snap_overlap);
-    file->snap_overlap.subtract(is);
-  }
-
-  file->data.clear();
-  file->data.append(bl);
-  return 0;
-}
-
-int TestMemIoCtxImpl::writesame(const std::string& oid, bufferlist& bl, size_t len,
-                                uint64_t off, const SnapContext &snapc) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  if (len == 0 || (len % bl.length())) {
-    return -EINVAL;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::WLocker l(m_pool->file_lock);
-    file = get_file(oid, true, snapc);
-  }
-
-  RWLock::WLocker l(file->lock);
-  if (len > 0) {
-    interval_set<uint64_t> is;
-    is.insert(off, len);
-    is.intersection_of(file->snap_overlap);
-    file->snap_overlap.subtract(is);
-  }
-
-  ensure_minimum_length(off + len, &file->data);
-  while (len > 0) {
-    file->data.copy_in(off, bl.length(), bl);
-    off += bl.length();
-    len -= bl.length();
-  }
-  return 0;
-}
-
-int TestMemIoCtxImpl::cmpext(const std::string& oid, uint64_t off,
-                             bufferlist& cmp_bl) {
-  if (get_snap_read() != CEPH_NOSNAP) {
-    return -EROFS;
-  } else if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  if (cmp_bl.length() == 0) {
-    return -EINVAL;
-  }
-
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::WLocker l(m_pool->file_lock);
-    file = get_file(oid, true, get_snap_context());
-  }
-
-  RWLock::RLocker l(file->lock);
-  size_t len = cmp_bl.length();
-  ensure_minimum_length(off + len, &file->data);
-  if (len > 0 && off <= len) {
-    for (uint64_t p = off; p < len; p++)  {
-      if (file->data[p] != cmp_bl[p])
-        return -MAX_ERRNO - p;
-    }
-  }
-  return 0;
-}
-
-int TestMemIoCtxImpl::xattr_get(const std::string& oid,
-                                std::map<std::string, bufferlist>* attrset) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  TestMemCluster::SharedFile file;
-  RWLock::RLocker l(m_pool->file_lock);
-  TestMemCluster::FileXAttrs::iterator it = m_pool->file_xattrs.find(oid);
-  if (it == m_pool->file_xattrs.end()) {
-    return -ENODATA;
-  }
-  *attrset = it->second;
-  return 0;
-}
-
-int TestMemIoCtxImpl::xattr_set(const std::string& oid, const std::string &name,
-                                bufferlist& bl) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  RWLock::WLocker l(m_pool->file_lock);
-  m_pool->file_xattrs[oid][name] = bl;
-  return 0;
-}
-
-int TestMemIoCtxImpl::zero(const std::string& oid, uint64_t off, uint64_t len) {
-  if (m_client->is_blacklisted()) {
-    return -EBLACKLISTED;
-  }
-
-  bool truncate_redirect = false;
-  TestMemCluster::SharedFile file;
-  {
-    RWLock::WLocker l(m_pool->file_lock);
-    file = get_file(oid, false, get_snap_context());
-    if (!file) {
-      return 0;
-    }
-    file = get_file(oid, true, get_snap_context());
-
-    RWLock::RLocker l2(file->lock);
-    if (len > 0 && off + len >= file->data.length()) {
-      // Zero -> Truncate logic embedded in OSD
-      truncate_redirect = true;
-    }
-  }
-  if (truncate_redirect) {
-    return truncate(oid, off, get_snap_context());
-  }
-
-  bufferlist bl;
-  bl.append_zero(len);
-  return write(oid, bl, len, off, get_snap_context());
-}
-
-void TestMemIoCtxImpl::append_clone(bufferlist& src, bufferlist* dest) {
-  // deep-copy the src to ensure our memory-based mock RADOS data cannot
-  // be modified by callers
-  if (src.length() > 0) {
-    bufferlist::iterator iter = src.begin();
-    buffer::ptr ptr;
-    iter.copy_deep(src.length(), ptr);
-    dest->append(ptr);
-  }
-}
-
-size_t TestMemIoCtxImpl::clip_io(size_t off, size_t len, size_t bl_len) {
-  if (off >= bl_len) {
-    len = 0;
-  } else if (off + len > bl_len) {
-    len = bl_len - off;
-  }
-  return len;
-}
-
-void TestMemIoCtxImpl::ensure_minimum_length(size_t len, bufferlist *bl) {
-  if (len > bl->length()) {
-    bufferptr ptr(buffer::create(len - bl->length()));
-    ptr.zero();
-    bl->append(ptr);
-  }
-}
-
-TestMemCluster::SharedFile TestMemIoCtxImpl::get_file(
-    const std::string &oid, bool write, const SnapContext &snapc) {
-  assert(m_pool->file_lock.is_locked() || m_pool->file_lock.is_wlocked());
-  assert(!write || m_pool->file_lock.is_wlocked());
-
-  TestMemCluster::SharedFile file;
-  TestMemCluster::Files::iterator it = m_pool->files.find(oid);
-  if (it != m_pool->files.end()) {
-    file = it->second.back();
-  } else if (!write) {
-    return TestMemCluster::SharedFile();
-  }
-
-  if (write) {
-    bool new_version = false;
-    if (!file || !file->exists) {
-      file = TestMemCluster::SharedFile(new TestMemCluster::File());
-      new_version = true;
-    } else {
-      if (!snapc.snaps.empty() && file->snap_id < snapc.seq) {
-        for (std::vector<snapid_t>::const_reverse_iterator seq_it =
-            snapc.snaps.rbegin();
-            seq_it != snapc.snaps.rend(); ++seq_it) {
-          if (*seq_it > file->snap_id && *seq_it <= snapc.seq) {
-            file->snaps.push_back(*seq_it);
-          }
-        }
-
-        bufferlist prev_data = file->data;
-        file = TestMemCluster::SharedFile(
-          new TestMemCluster::File(*file));
-        file->data.clear();
-        append_clone(prev_data, &file->data);
-        if (prev_data.length() > 0) {
-          file->snap_overlap.insert(0, prev_data.length());
-        }
-        new_version = true;
-      }
-    }
-
-    if (new_version) {
-      file->snap_id = snapc.seq;
-      file->mtime = ceph_clock_now().sec();
-      m_pool->files[oid].push_back(file);
-    }
-    return file;
-  }
-
-  if (get_snap_read() == CEPH_NOSNAP) {
-    if (!file->exists) {
-      assert(it->second.size() > 1);
-      return TestMemCluster::SharedFile();
-    }
-    return file;
-  }
-
-  TestMemCluster::FileSnapshots &snaps = it->second;
-  for (TestMemCluster::FileSnapshots::reverse_iterator it = snaps.rbegin();
-      it != snaps.rend(); ++it) {
-    TestMemCluster::SharedFile file = *it;
-    if (file->snap_id < get_snap_read()) {
-      if (!file->exists) {
-        return TestMemCluster::SharedFile();
-      }
-      return file;
-    }
-  }
-  return TestMemCluster::SharedFile();
-}
-
-} // namespace librados