update sources to ceph Nautilus 14.2.1

[ceph.git] / ceph / src / tools / ceph_objectstore_tool.cc

// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
 * Ceph - scalable distributed file system
 *
 * Copyright (C) 2013 Inktank
 *
 * This is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1, as published by the Free Software
 * Foundation.  See file COPYING.
 *
 */

#include <boost/program_options/variables_map.hpp>
#include <boost/program_options/parsers.hpp>
#include <boost/scoped_ptr.hpp>
#include <boost/optional.hpp>

#include <stdlib.h>

#include "common/Formatter.h"
#include "common/errno.h"
#include "common/ceph_argparse.h"

#include "global/global_init.h"

#include "os/ObjectStore.h"
#include "os/filestore/FileJournal.h"
#include "os/filestore/FileStore.h"
#ifdef HAVE_LIBFUSE
#include "os/FuseStore.h"
#endif

#include "osd/PGLog.h"
#include "osd/OSD.h"
#include "osd/PG.h"
#include "osd/ECUtil.h"

#include "json_spirit/json_spirit_value.h"
#include "json_spirit/json_spirit_reader.h"

#include "rebuild_mondb.h"
#include "ceph_objectstore_tool.h"
#include "include/compat.h"
#include "include/util.h"

namespace po = boost::program_options;

#ifdef INTERNAL_TEST
CompatSet get_test_compat_set() {
  CompatSet::FeatureSet ceph_osd_feature_compat;
  CompatSet::FeatureSet ceph_osd_feature_ro_compat;
  CompatSet::FeatureSet ceph_osd_feature_incompat;
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_BASE);
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_PGINFO);
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_OLOC);
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_LEC);
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_CATEGORIES);
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_HOBJECTPOOL);
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_BIGINFO);
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_LEVELDBINFO);
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_LEVELDBLOG);
#ifdef INTERNAL_TEST2
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_SNAPMAPPER);
  ceph_osd_feature_incompat.insert(CEPH_OSD_FEATURE_INCOMPAT_SHARDS);
#endif
  return CompatSet(ceph_osd_feature_compat, ceph_osd_feature_ro_compat,
		   ceph_osd_feature_incompat);
}
#endif

const ssize_t max_read = 1024 * 1024;
const int fd_none = INT_MIN;
bool outistty;
bool dry_run;

struct action_on_object_t {
  virtual ~action_on_object_t() {}
  virtual void call(ObjectStore *store, coll_t coll, ghobject_t &ghobj, object_info_t &oi) = 0;
};

int _action_on_all_objects_in_pg(ObjectStore *store, coll_t coll, action_on_object_t &action, bool debug)
{
  auto ch = store->open_collection(coll);
  unsigned LIST_AT_A_TIME = 100;
  ghobject_t next;
  while (!next.is_max()) {
    vector<ghobject_t> list;
    int r = store->collection_list(ch,
				   next,
				   ghobject_t::get_max(),
				   LIST_AT_A_TIME,
				   &list,
				   &next);
    if (r < 0) {
      cerr << "Error listing collection: " << coll << ", "
	   << cpp_strerror(r) << std::endl;
      return r;
    }
    for (vector<ghobject_t>::iterator obj = list.begin();
	 obj != list.end();
	 ++obj) {
      if (obj->is_pgmeta())
	continue;
      object_info_t oi;
      if (coll != coll_t::meta()) {
        bufferlist attr;
        r = store->getattr(ch, *obj, OI_ATTR, attr);
        if (r < 0) {
	  cerr << "Error getting attr on : " << make_pair(coll, *obj) << ", "
	       << cpp_strerror(r) << std::endl;
        } else {
	  auto bp = attr.cbegin();
	  try {
	    decode(oi, bp);
	  } catch (...) {
	    r = -EINVAL;
	    cerr << "Error decoding attr on : " << make_pair(coll, *obj) << ", "
		 << cpp_strerror(r) << std::endl;
	  }
	}
      }
      action.call(store, coll, *obj, oi);
    }
  }
  return 0;
}

int action_on_all_objects_in_pg(ObjectStore *store, string pgidstr, action_on_object_t &action, bool debug)
{
  spg_t pgid;
  // Scan collections in case this is an ec pool but no shard specified
  unsigned scanned = 0;
  int r = 0;
  vector<coll_t> colls_to_check;
  vector<coll_t> candidates;
  r = store->list_collections(candidates);
  if (r < 0) {
    cerr << "Error listing collections: " << cpp_strerror(r) << std::endl;
    return r;
  }
  pgid.parse(pgidstr.c_str());
  for (vector<coll_t>::iterator i = candidates.begin();
       i != candidates.end();
       ++i) {
    spg_t cand_pgid;
    if (!i->is_pg(&cand_pgid))
      continue;

    // If an exact match or treat no shard as any shard
    if (cand_pgid == pgid ||
        (pgid.is_no_shard() && pgid.pgid == cand_pgid.pgid)) {
      colls_to_check.push_back(*i);
    }
  }

  if (debug)
    cerr << colls_to_check.size() << " pgs to scan" << std::endl;
  for (vector<coll_t>::iterator i = colls_to_check.begin();
       i != colls_to_check.end();
       ++i, ++scanned) {
    if (debug)
      cerr << "Scanning " << *i << ", " << scanned << "/"
	   << colls_to_check.size() << " completed" << std::endl;
    r = _action_on_all_objects_in_pg(store, *i, action, debug);
    if (r < 0)
      break;
  }
  return r;
}

int action_on_all_objects_in_exact_pg(ObjectStore *store, coll_t coll, action_on_object_t &action, bool debug)
{
  int r = _action_on_all_objects_in_pg(store, coll, action, debug);
  return r;
}

int _action_on_all_objects(ObjectStore *store, action_on_object_t &action, bool debug)
{
  unsigned scanned = 0;
  int r = 0;
  vector<coll_t> colls_to_check;
  vector<coll_t> candidates;
  r = store->list_collections(candidates);
  if (r < 0) {
    cerr << "Error listing collections: " << cpp_strerror(r) << std::endl;
    return r;
  }
  for (vector<coll_t>::iterator i = candidates.begin();
       i != candidates.end();
       ++i) {
    if (i->is_pg()) {
      colls_to_check.push_back(*i);
    }
  }

  if (debug)
    cerr << colls_to_check.size() << " pgs to scan" << std::endl;
  for (vector<coll_t>::iterator i = colls_to_check.begin();
       i != colls_to_check.end();
       ++i, ++scanned) {
    if (debug)
      cerr << "Scanning " << *i << ", " << scanned << "/"
	   << colls_to_check.size() << " completed" << std::endl;
    r = _action_on_all_objects_in_pg(store, *i, action, debug);
    if (r < 0)
      return r;
  }
  return 0;
}

int action_on_all_objects(ObjectStore *store, action_on_object_t &action, bool debug)
{
  int r = _action_on_all_objects(store, action, debug);
  return r;
}

struct pgid_object_list {
  list<pair<coll_t, ghobject_t> > _objects;

  void insert(coll_t coll, ghobject_t &ghobj) {
    _objects.push_back(make_pair(coll, ghobj));
  }

  void dump(Formatter *f, bool human_readable) const {
    if (!human_readable)
      f->open_array_section("pgid_objects");
    for (list<pair<coll_t, ghobject_t> >::const_iterator i = _objects.begin();
	 i != _objects.end();
	 ++i) {
      f->open_array_section("pgid_object");
      spg_t pgid;
      bool is_pg = i->first.is_pg(&pgid);
      if (is_pg)
        f->dump_string("pgid", stringify(pgid));
      if (!is_pg || !human_readable)
        f->dump_string("coll", i->first.to_str());
      f->open_object_section("ghobject");
      i->second.dump(f);
      f->close_section();
      f->close_section();
      if (human_readable) {
        f->flush(cout);
        cout << std::endl;
      }
    }
    if (!human_readable) {
      f->close_section();
      f->flush(cout);
      cout << std::endl;
    }
  }
};

struct lookup_ghobject : public action_on_object_t {
  pgid_object_list _objects;
  const string _name;
  const boost::optional<std::string> _namespace;
  bool _need_snapset;

  lookup_ghobject(const string& name, const boost::optional<std::string>& nspace, bool need_snapset = false) : _name(name),
		  _namespace(nspace), _need_snapset(need_snapset) { }

  void call(ObjectStore *store, coll_t coll, ghobject_t &ghobj, object_info_t &oi) override {
    if (_need_snapset && !ghobj.hobj.has_snapset())
      return;
    if ((_name.length() == 0 || ghobj.hobj.oid.name == _name) &&
        (!_namespace || ghobj.hobj.nspace == _namespace))
      _objects.insert(coll, ghobj);
    return;
  }

  int size() const {
    return _objects._objects.size();
  }

  pair<coll_t, ghobject_t> pop() {
     pair<coll_t, ghobject_t> front = _objects._objects.front();
     _objects._objects.pop_front();
     return front;
  }

  void dump(Formatter *f, bool human_readable) const {
    _objects.dump(f, human_readable);
  }
};

int file_fd = fd_none;
bool debug;
bool force = false;
super_header sh;

static int get_fd_data(int fd, bufferlist &bl)
{
  uint64_t total = 0;
  do {
    ssize_t bytes = bl.read_fd(fd, max_read);
    if (bytes < 0) {
      cerr << "read_fd error " << cpp_strerror(bytes) << std::endl;
      return bytes;
    }

    if (bytes == 0)
      break;

    total += bytes;
  } while(true);

  ceph_assert(bl.length() == total);
  return 0;
}

int get_log(ObjectStore *fs, __u8 struct_ver,
	    spg_t pgid, const pg_info_t &info,
	    PGLog::IndexedLog &log, pg_missing_t &missing)
{
  try {
    auto ch = fs->open_collection(coll_t(pgid));
    if (!ch) {
      return -ENOENT;
    }
    ostringstream oss;
    ceph_assert(struct_ver > 0);
    PGLog::read_log_and_missing(
      fs, ch,
      pgid.make_pgmeta_oid(),
      info, log, missing,
      oss,
      g_ceph_context->_conf->osd_ignore_stale_divergent_priors);
    if (debug && oss.str().size())
      cerr << oss.str() << std::endl;
  }
  catch (const buffer::error &e) {
    cerr << "read_log_and_missing threw exception error " << e.what() << std::endl;
    return -EFAULT;
  }
  return 0;
}

void dump_log(Formatter *formatter, ostream &out, pg_log_t &log,
	      pg_missing_t &missing)
{
  formatter->open_object_section("op_log");
  formatter->open_object_section("pg_log_t");
  log.dump(formatter);
  formatter->close_section();
  formatter->flush(out);
  formatter->open_object_section("pg_missing_t");
  missing.dump(formatter);
  formatter->close_section();
  formatter->close_section();
  formatter->flush(out);
}

//Based on part of OSD::load_pgs()
int finish_remove_pgs(ObjectStore *store)
{
  vector<coll_t> ls;
  int r = store->list_collections(ls);
  if (r < 0) {
    cerr << "finish_remove_pgs: failed to list pgs: " << cpp_strerror(r)
      << std::endl;
    return r;
  }

  for (vector<coll_t>::iterator it = ls.begin();
       it != ls.end();
       ++it) {
    spg_t pgid;

    if (it->is_temp(&pgid) ||
       (it->is_pg(&pgid) && PG::_has_removal_flag(store, pgid))) {
      cout << "finish_remove_pgs " << *it << " removing " << pgid << std::endl;
      OSD::recursive_remove_collection(g_ceph_context, store, pgid, *it);
      continue;
    }

    //cout << "finish_remove_pgs ignoring unrecognized " << *it << std::endl;
  }
  return 0;
}

#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"

int mark_pg_for_removal(ObjectStore *fs, spg_t pgid, ObjectStore::Transaction *t)
{
  pg_info_t info(pgid);
  coll_t coll(pgid);
  ghobject_t pgmeta_oid(info.pgid.make_pgmeta_oid());

  epoch_t map_epoch = 0;
  int r = PG::peek_map_epoch(fs, pgid, &map_epoch);
  if (r < 0)
    cerr << __func__ << " warning: peek_map_epoch reported error" << std::endl;
  PastIntervals past_intervals;
  __u8 struct_v;
  r = PG::read_info(fs, pgid, coll, info, past_intervals, struct_v);
  if (r < 0) {
    cerr << __func__ << " error on read_info " << cpp_strerror(r) << std::endl;
    return r;
  }
  ceph_assert(struct_v >= 8);
  // new omap key
  cout << "setting '_remove' omap key" << std::endl;
  map<string,bufferlist> values;
  encode((char)1, values["_remove"]);
  t->omap_setkeys(coll, pgmeta_oid, values);
  return 0;
}

#pragma GCC diagnostic pop
#pragma GCC diagnostic warning "-Wpragmas"

template<typename Func>
void wait_until_done(ObjectStore::Transaction* txn, Func&& func)
{
  bool finished = false;
  std::condition_variable cond;
  std::mutex m;
  txn->register_on_complete(make_lambda_context([&]() {
    std::unique_lock lock{m};
    finished = true;
    cond.notify_one();
  }));
  std::move(func)();
  std::unique_lock lock{m};
  cond.wait(lock, [&] {return finished;});
}

int initiate_new_remove_pg(ObjectStore *store, spg_t r_pgid)
{
  if (!dry_run)
    finish_remove_pgs(store);
  if (!store->collection_exists(coll_t(r_pgid)))
    return -ENOENT;

  cout << " marking collection for removal" << std::endl;
  if (dry_run)
    return 0;
  ObjectStore::Transaction rmt;
  int r = mark_pg_for_removal(store, r_pgid, &rmt);
  if (r < 0) {
    return r;
  }
  ObjectStore::CollectionHandle ch = store->open_collection(coll_t(r_pgid));
  store->queue_transaction(ch, std::move(rmt));
  finish_remove_pgs(store);
  return r;
}

int write_info(ObjectStore::Transaction &t, epoch_t epoch, pg_info_t &info,
    PastIntervals &past_intervals)
{
  //Empty for this
  coll_t coll(info.pgid);
  ghobject_t pgmeta_oid(info.pgid.make_pgmeta_oid());
  map<string,bufferlist> km;
  pg_info_t last_written_info;
  int ret = PG::_prepare_write_info(
    g_ceph_context,
    &km, epoch,
    info,
    last_written_info,
    past_intervals,
    true, true, false);
  if (ret) cerr << "Failed to write info" << std::endl;
  t.omap_setkeys(coll, pgmeta_oid, km);
  return ret;
}

typedef map<eversion_t, hobject_t> divergent_priors_t;

int write_pg(ObjectStore::Transaction &t, epoch_t epoch, pg_info_t &info,
	     pg_log_t &log, PastIntervals &past_intervals,
	     divergent_priors_t &divergent,
	     pg_missing_t &missing)
{
  cout << __func__ << " epoch " << epoch << " info " << info << std::endl;
  int ret = write_info(t, epoch, info, past_intervals);
  if (ret)
    return ret;
  coll_t coll(info.pgid);
  map<string,bufferlist> km;

  if (!divergent.empty()) {
    ceph_assert(missing.get_items().empty());
    PGLog::write_log_and_missing_wo_missing(
      t, &km, log, coll, info.pgid.make_pgmeta_oid(), divergent, true);
  } else {
    pg_missing_tracker_t tmissing(missing);
    bool rebuilt_missing_set_with_deletes = missing.may_include_deletes;
    PGLog::write_log_and_missing(
      t, &km, log, coll, info.pgid.make_pgmeta_oid(), tmissing, true,
      &rebuilt_missing_set_with_deletes);
  }
  t.omap_setkeys(coll, info.pgid.make_pgmeta_oid(), km);
  return 0;
}

int do_trim_pg_log(ObjectStore *store, const coll_t &coll,
		   pg_info_t &info, const spg_t &pgid,
		   epoch_t map_epoch,
		   PastIntervals &past_intervals)
{
  ghobject_t oid = pgid.make_pgmeta_oid();
  struct stat st;
  auto ch = store->open_collection(coll);
  int r = store->stat(ch, oid, &st);
  ceph_assert(r == 0);
  ceph_assert(st.st_size == 0);

  cerr << "Log bounds are: " << "(" << info.log_tail << ","
       << info.last_update << "]" << std::endl;

  uint64_t max_entries = g_ceph_context->_conf->osd_max_pg_log_entries;
  if (info.last_update.version - info.log_tail.version <= max_entries) {
    cerr << "Log not larger than osd_max_pg_log_entries " << max_entries << std::endl;
    return 0;
  }

  ceph_assert(info.last_update.version > max_entries);
  version_t trim_to = info.last_update.version - max_entries;
  size_t trim_at_once = g_ceph_context->_conf->osd_pg_log_trim_max;
  eversion_t new_tail;
  bool done = false;

  while (!done) {
    // gather keys so we can delete them in a batch without
    // affecting the iterator
    set<string> keys_to_trim;
    {
    ObjectMap::ObjectMapIterator p = store->get_omap_iterator(ch, oid);
    if (!p)
      break;
    for (p->seek_to_first(); p->valid(); p->next()) {
      if (p->key()[0] == '_')
	continue;
      if (p->key() == "can_rollback_to")
	continue;
      if (p->key() == "divergent_priors")
	continue;
      if (p->key() == "rollback_info_trimmed_to")
	continue;
      if (p->key() == "may_include_deletes_in_missing")
	continue;
      if (p->key().substr(0, 7) == string("missing"))
	continue;
      if (p->key().substr(0, 4) == string("dup_"))
	continue;

      bufferlist bl = p->value();
      auto bp = bl.cbegin();
      pg_log_entry_t e;
      try {
	e.decode_with_checksum(bp);
      } catch (const buffer::error &e) {
	cerr << "Error reading pg log entry: " << e << std::endl;
      }
      if (debug) {
	cerr << "read entry " << e << std::endl;
      }
      if (e.version.version > trim_to) {
	done = true;
	break;
      }
      keys_to_trim.insert(p->key());
      new_tail = e.version;
      if (keys_to_trim.size() >= trim_at_once)
	break;
    }

    if (!p->valid())
      done = true;
    } // deconstruct ObjectMapIterator

    // delete the keys
    if (!dry_run && !keys_to_trim.empty()) {
      cout << "Removing keys " << *keys_to_trim.begin() << " - " << *keys_to_trim.rbegin() << std::endl;
      ObjectStore::Transaction t;
      t.omap_rmkeys(coll, oid, keys_to_trim);
      store->queue_transaction(ch, std::move(t));
      ch->flush();
    }
  }

  // update pg info with new tail
  if (!dry_run && new_tail !=  eversion_t()) {
    info.log_tail = new_tail;
    ObjectStore::Transaction t;
    int ret = write_info(t, map_epoch, info, past_intervals);
    if (ret)
      return ret;
    store->queue_transaction(ch, std::move(t));
    ch->flush();
  }

  // compact the db since we just removed a bunch of data
  cerr << "Finished trimming, now compacting..." << std::endl;
  if (!dry_run)
    store->compact();
  return 0;
}

const int OMAP_BATCH_SIZE = 25;
void get_omap_batch(ObjectMap::ObjectMapIterator &iter, map<string, bufferlist> &oset)
{
  oset.clear();
  for (int count = OMAP_BATCH_SIZE; count && iter->valid(); --count, iter->next()) {
    oset.insert(pair<string, bufferlist>(iter->key(), iter->value()));
  }
}

int ObjectStoreTool::export_file(ObjectStore *store, coll_t cid, ghobject_t &obj)
{
  struct stat st;
  mysize_t total;
  footer ft;

  auto ch = store->open_collection(cid);
  int ret = store->stat(ch, obj, &st);
  if (ret < 0)
    return ret;

  cerr << "Read " << obj << std::endl;

  total = st.st_size;
  if (debug)
    cerr << "size=" << total << std::endl;

  object_begin objb(obj);

  {
    bufferptr bp;
    bufferlist bl;
    ret = store->getattr(ch, obj, OI_ATTR, bp);
    if (ret < 0) {
      cerr << "getattr failure object_info " << ret << std::endl;
      return ret;
    }
    bl.push_back(bp);
    decode(objb.oi, bl);
    if (debug)
      cerr << "object_info: " << objb.oi << std::endl;
  }

  // NOTE: we include whiteouts, lost, etc.

  ret = write_section(TYPE_OBJECT_BEGIN, objb, file_fd);
  if (ret < 0)
    return ret;

  uint64_t offset = 0;
  bufferlist rawdatabl;
  while(total > 0) {
    rawdatabl.clear();
    mysize_t len = max_read;
    if (len > total)
      len = total;

    ret = store->read(ch, obj, offset, len, rawdatabl);
    if (ret < 0)
      return ret;
    if (ret == 0)
      return -EINVAL;

    data_section dblock(offset, len, rawdatabl);
    if (debug)
      cerr << "data section offset=" << offset << " len=" << len << std::endl;

    total -= ret;
    offset += ret;

    ret = write_section(TYPE_DATA, dblock, file_fd);
    if (ret) return ret;
  }

  //Handle attrs for this object
  map<string,bufferptr> aset;
  ret = store->getattrs(ch, obj, aset);
  if (ret) return ret;
  attr_section as(aset);
  ret = write_section(TYPE_ATTRS, as, file_fd);
  if (ret)
    return ret;

  if (debug) {
    cerr << "attrs size " << aset.size() << std::endl;
  }

  //Handle omap information
  bufferlist hdrbuf;
  ret = store->omap_get_header(ch, obj, &hdrbuf, true);
  if (ret < 0) {
    cerr << "omap_get_header: " << cpp_strerror(ret) << std::endl;
    return ret;
  }

  omap_hdr_section ohs(hdrbuf);
  ret = write_section(TYPE_OMAP_HDR, ohs, file_fd);
  if (ret)
    return ret;

  ObjectMap::ObjectMapIterator iter = store->get_omap_iterator(ch, obj);
  if (!iter) {
    ret = -ENOENT;
    cerr << "omap_get_iterator: " << cpp_strerror(ret) << std::endl;
    return ret;
  }
  iter->seek_to_first();
  int mapcount = 0;
  map<string, bufferlist> out;
  while(iter->valid()) {
    get_omap_batch(iter, out);

    if (out.empty()) break;

    mapcount += out.size();
    omap_section oms(out);
    ret = write_section(TYPE_OMAP, oms, file_fd);
    if (ret)
      return ret;
  }
  if (debug)
    cerr << "omap map size " << mapcount << std::endl;

  ret = write_simple(TYPE_OBJECT_END, file_fd);
  if (ret)
    return ret;

  return 0;
}

int ObjectStoreTool::export_files(ObjectStore *store, coll_t coll)
{
  ghobject_t next;
  auto ch = store->open_collection(coll);
  while (!next.is_max()) {
    vector<ghobject_t> objects;
    int r = store->collection_list(ch, next, ghobject_t::get_max(), 300,
      &objects, &next);
    if (r < 0)
      return r;
    for (vector<ghobject_t>::iterator i = objects.begin();
	 i != objects.end();
	 ++i) {
      ceph_assert(!i->hobj.is_meta());
      if (i->is_pgmeta() || i->hobj.is_temp() || !i->is_no_gen()) {
	continue;
      }
      r = export_file(store, coll, *i);
      if (r < 0)
        return r;
    }
  }
  return 0;
}

int set_inc_osdmap(ObjectStore *store, epoch_t e, bufferlist& bl, bool force) {
  OSDMap::Incremental inc;
  auto it = bl.cbegin();
  inc.decode(it);
  if (e == 0) {
    e = inc.epoch;
  } else if (e != inc.epoch) {
    cerr << "incremental.epoch mismatch: "
	 << inc.epoch << " != " << e << std::endl;
    if (force) {
      cerr << "But will continue anyway." << std::endl;
    } else {
      return -EINVAL;
    }
  }
  auto ch = store->open_collection(coll_t::meta());
  const ghobject_t inc_oid = OSD::get_inc_osdmap_pobject_name(e);
  if (!store->exists(ch, inc_oid)) {
    cerr << "inc-osdmap (" << inc_oid << ") does not exist." << std::endl;
    if (!force) {
      return -ENOENT;
    }
    cout << "Creating a new epoch." << std::endl;
  }
  if (dry_run)
    return 0;
  ObjectStore::Transaction t;
  t.write(coll_t::meta(), inc_oid, 0, bl.length(), bl);
  t.truncate(coll_t::meta(), inc_oid, bl.length());
  store->queue_transaction(ch, std::move(t));
  return 0;
}

int get_inc_osdmap(ObjectStore *store, epoch_t e, bufferlist& bl)
{
  auto ch = store->open_collection(coll_t::meta());
  if (store->read(ch,
		  OSD::get_inc_osdmap_pobject_name(e),
		  0, 0, bl) < 0) {
    return -ENOENT;
  }
  return 0;
}

int set_osdmap(ObjectStore *store, epoch_t e, bufferlist& bl, bool force) {
  OSDMap osdmap;
  osdmap.decode(bl);
  if (e == 0) {
    e = osdmap.get_epoch();
  } else if (e != osdmap.get_epoch()) {
    cerr << "osdmap.epoch mismatch: "
	 << e << " != " << osdmap.get_epoch() << std::endl;
    if (force) {
      cerr << "But will continue anyway." << std::endl;
    } else {
      return -EINVAL;
    }
  }
  auto ch = store->open_collection(coll_t::meta());
  const ghobject_t full_oid = OSD::get_osdmap_pobject_name(e);
  if (!store->exists(ch, full_oid)) {
    cerr << "osdmap (" << full_oid << ") does not exist." << std::endl;
    if (!force) {
      return -ENOENT;
    }
    cout << "Creating a new epoch." << std::endl;
  }
  if (dry_run)
    return 0;
  ObjectStore::Transaction t;
  t.write(coll_t::meta(), full_oid, 0, bl.length(), bl);
  t.truncate(coll_t::meta(), full_oid, bl.length());
  store->queue_transaction(ch, std::move(t));
  return 0;
}

int get_osdmap(ObjectStore *store, epoch_t e, OSDMap &osdmap, bufferlist& bl)
{
  ObjectStore::CollectionHandle ch = store->open_collection(coll_t::meta());
  bool found = store->read(
    ch, OSD::get_osdmap_pobject_name(e), 0, 0, bl) >= 0;
  if (!found) {
    cerr << "Can't find OSDMap for pg epoch " << e << std::endl;
    return -ENOENT;
  }
  osdmap.decode(bl);
  if (debug)
    cerr << osdmap << std::endl;
  return 0;
}

int get_pg_num_history(ObjectStore *store, pool_pg_num_history_t *h)
{
  ObjectStore::CollectionHandle ch = store->open_collection(coll_t::meta());
  bufferlist bl;
  auto pghist = OSD::make_pg_num_history_oid();
  int r = store->read(ch, pghist, 0, 0, bl, 0);
  if (r >= 0 && bl.length() > 0) {
    auto p = bl.cbegin();
    decode(*h, p);
  }
  cout << __func__ << " pg_num_history " << *h << std::endl;
  return 0;
}

int add_osdmap(ObjectStore *store, metadata_section &ms)
{
  return get_osdmap(store, ms.map_epoch, ms.osdmap, ms.osdmap_bl);
}

int ObjectStoreTool::do_export(ObjectStore *fs, coll_t coll, spg_t pgid,
    pg_info_t &info, epoch_t map_epoch, __u8 struct_ver,
    const OSDSuperblock& superblock,
    PastIntervals &past_intervals)
{
  PGLog::IndexedLog log;
  pg_missing_t missing;

  cerr << "Exporting " << pgid << " info " << info << std::endl;

  int ret = get_log(fs, struct_ver, pgid, info, log, missing);
  if (ret > 0)
      return ret;

  if (debug) {
    Formatter *formatter = Formatter::create("json-pretty");
    ceph_assert(formatter);
    dump_log(formatter, cerr, log, missing);
    delete formatter;
  }
  write_super();

  pg_begin pgb(pgid, superblock);
  // Special case: If replicated pg don't require the importing OSD to have shard feature
  if (pgid.is_no_shard()) {
    pgb.superblock.compat_features.incompat.remove(CEPH_OSD_FEATURE_INCOMPAT_SHARDS);
  }
  ret = write_section(TYPE_PG_BEGIN, pgb, file_fd);
  if (ret)
    return ret;

  // The metadata_section is now before files, so import can detect
  // errors and abort without wasting time.
  metadata_section ms(
    struct_ver,
    map_epoch,
    info,
    log,
    past_intervals,
    missing);
  ret = add_osdmap(fs, ms);
  if (ret)
    return ret;
  ret = write_section(TYPE_PG_METADATA, ms, file_fd);
  if (ret)
    return ret;

  ret = export_files(fs, coll);
  if (ret) {
    cerr << "export_files error " << ret << std::endl;
    return ret;
  }

  ret = write_simple(TYPE_PG_END, file_fd);
  if (ret)
    return ret;

  return 0;
}

int dump_data(Formatter *formatter, bufferlist &bl)
{
  auto ebliter = bl.cbegin();
  data_section ds;
  ds.decode(ebliter);

  formatter->open_object_section("data_block");
  formatter->dump_unsigned("offset", ds.offset);
  formatter->dump_unsigned("len", ds.len);
  // XXX: Add option to dump data like od -cx ?
  formatter->close_section();
  formatter->flush(cout);
  return 0;
}

int get_data(ObjectStore *store, coll_t coll, ghobject_t hoid,
    ObjectStore::Transaction *t, bufferlist &bl)
{
  auto ebliter = bl.cbegin();
  data_section ds;
  ds.decode(ebliter);

  if (debug)
    cerr << "\tdata: offset " << ds.offset << " len " << ds.len << std::endl;
  t->write(coll, hoid, ds.offset, ds.len,  ds.databl);
  return 0;
}

int dump_attrs(
  Formatter *formatter, ghobject_t hoid,
  bufferlist &bl)
{
  auto ebliter = bl.cbegin();
  attr_section as;
  as.decode(ebliter);

  // This could have been handled in the caller if we didn't need to
  // support exports that didn't include object_info_t in object_begin.
  if (hoid.generation == ghobject_t::NO_GEN &&
      hoid.hobj.is_head()) {
    map<string,bufferlist>::iterator mi = as.data.find(SS_ATTR);
    if (mi != as.data.end()) {
      SnapSet snapset;
      auto p = mi->second.cbegin();
      snapset.decode(p);
      formatter->open_object_section("snapset");
      snapset.dump(formatter);
      formatter->close_section();
    } else {
      formatter->open_object_section("snapset");
      formatter->dump_string("error", "missing SS_ATTR");
      formatter->close_section();
    }
  }

  formatter->open_object_section("attrs");
  formatter->open_array_section("user");
  for (auto kv : as.data) {
      // Skip system attributes
      if (('_' != kv.first.at(0)) || kv.first.size() == 1)
	continue;
      formatter->open_object_section("user_attr");
      formatter->dump_string("name", kv.first.substr(1));
      bool b64;
      formatter->dump_string("value", cleanbin(kv.second, b64));
      formatter->dump_bool("Base64", b64);
      formatter->close_section();
  }
  formatter->close_section();
  formatter->open_array_section("system");
  for (auto kv : as.data) {
      // Skip user attributes
      if (('_' == kv.first.at(0)) && kv.first.size() != 1)
	continue;
      formatter->open_object_section("sys_attr");
      formatter->dump_string("name", kv.first);
      formatter->close_section();
  }
  formatter->close_section();
  formatter->close_section();
  formatter->flush(cout);

  return 0;
}

int get_attrs(
  ObjectStore *store, coll_t coll, ghobject_t hoid,
  ObjectStore::Transaction *t, bufferlist &bl,
  OSDriver &driver, SnapMapper &snap_mapper)
{
  auto ebliter = bl.cbegin();
  attr_section as;
  as.decode(ebliter);

  auto ch = store->open_collection(coll);
  if (debug)
    cerr << "\tattrs: len " << as.data.size() << std::endl;
  t->setattrs(coll, hoid, as.data);

  // This could have been handled in the caller if we didn't need to
  // support exports that didn't include object_info_t in object_begin.
  if (hoid.generation == ghobject_t::NO_GEN &&
      hoid.hobj.is_head()) {
    map<string,bufferlist>::iterator mi = as.data.find(SS_ATTR);
    if (mi != as.data.end()) {
      SnapSet snapset;
      auto p = mi->second.cbegin();
      snapset.decode(p);
      cout << "snapset " << snapset << std::endl;
      for (auto& p : snapset.clone_snaps) {
	ghobject_t clone = hoid;
	clone.hobj.snap = p.first;
	set<snapid_t> snaps(p.second.begin(), p.second.end());
	if (!store->exists(ch, clone)) {
	  // no clone, skip.  this is probably a cache pool.  this works
	  // because we use a separate transaction per object and clones
	  // come before head in the archive.
	  if (debug)
	    cerr << "\tskipping missing " << clone << " (snaps "
		 << snaps << ")" << std::endl;
	  continue;
	}
	if (debug)
	  cerr << "\tsetting " << clone.hobj << " snaps " << snaps
	       << std::endl;
	OSDriver::OSTransaction _t(driver.get_transaction(t));
	ceph_assert(!snaps.empty());
	snap_mapper.add_oid(clone.hobj, snaps, &_t);
      }
    } else {
      cerr << "missing SS_ATTR on " << hoid << std::endl;
    }
  }
  return 0;
}

int dump_omap_hdr(Formatter *formatter, bufferlist &bl)
{
  auto ebliter = bl.cbegin();
  omap_hdr_section oh;
  oh.decode(ebliter);

  formatter->open_object_section("omap_header");
  formatter->dump_string("value", string(oh.hdr.c_str(), oh.hdr.length()));
  formatter->close_section();
  formatter->flush(cout);
  return 0;
}

int get_omap_hdr(ObjectStore *store, coll_t coll, ghobject_t hoid,
    ObjectStore::Transaction *t, bufferlist &bl)
{
  auto ebliter = bl.cbegin();
  omap_hdr_section oh;
  oh.decode(ebliter);

  if (debug)
    cerr << "\tomap header: " << string(oh.hdr.c_str(), oh.hdr.length())
      << std::endl;
  t->omap_setheader(coll, hoid, oh.hdr);
  return 0;
}

int dump_omap(Formatter *formatter, bufferlist &bl)
{
  auto ebliter = bl.cbegin();
  omap_section os;
  os.decode(ebliter);

  formatter->open_object_section("omaps");
  formatter->dump_unsigned("count", os.omap.size());
  formatter->open_array_section("data");
  for (auto o : os.omap) {
      formatter->open_object_section("omap");
      formatter->dump_string("name", o.first);
      bool b64;
      formatter->dump_string("value", cleanbin(o.second, b64));
      formatter->dump_bool("Base64", b64);
      formatter->close_section();
  }
  formatter->close_section();
  formatter->close_section();
  formatter->flush(cout);
  return 0;
}

int get_omap(ObjectStore *store, coll_t coll, ghobject_t hoid,
    ObjectStore::Transaction *t, bufferlist &bl)
{
  auto ebliter = bl.cbegin();
  omap_section os;
  os.decode(ebliter);

  if (debug)
    cerr << "\tomap: size " << os.omap.size() << std::endl;
  t->omap_setkeys(coll, hoid, os.omap);
  return 0;
}

int ObjectStoreTool::dump_object(Formatter *formatter,
				bufferlist &bl)
{
  auto ebliter = bl.cbegin();
  object_begin ob;
  ob.decode(ebliter);

  if (ob.hoid.hobj.is_temp()) {
    cerr << "ERROR: Export contains temporary object '" << ob.hoid << "'" << std::endl;
    return -EFAULT;
  }

  formatter->open_object_section("object");
  formatter->open_object_section("oid");
  ob.hoid.dump(formatter);
  formatter->close_section();
  formatter->open_object_section("object_info");
  ob.oi.dump(formatter);
  formatter->close_section();

  bufferlist ebl;
  bool done = false;
  while(!done) {
    sectiontype_t type;
    int ret = read_section(&type, &ebl);
    if (ret)
      return ret;

    //cout << "\tdo_object: Section type " << hex << type << dec << std::endl;
    //cout << "\t\tsection size " << ebl.length() << std::endl;
    if (type >= END_OF_TYPES) {
      cout << "Skipping unknown object section type" << std::endl;
      continue;
    }
    switch(type) {
    case TYPE_DATA:
      if (dry_run) break;
      ret = dump_data(formatter, ebl);
      if (ret) return ret;
      break;
    case TYPE_ATTRS:
      if (dry_run) break;
      ret = dump_attrs(formatter, ob.hoid, ebl);
      if (ret) return ret;
      break;
    case TYPE_OMAP_HDR:
      if (dry_run) break;
      ret = dump_omap_hdr(formatter, ebl);
      if (ret) return ret;
      break;
    case TYPE_OMAP:
      if (dry_run) break;
      ret = dump_omap(formatter, ebl);
      if (ret) return ret;
      break;
    case TYPE_OBJECT_END:
      done = true;
      break;
    default:
      cerr << "Unknown section type " << type << std::endl;
      return -EFAULT;
    }
  }
  formatter->close_section();
  return 0;
}

int ObjectStoreTool::get_object(ObjectStore *store,
				OSDriver& driver,
				SnapMapper& mapper,
				coll_t coll,
				bufferlist &bl, OSDMap &origmap,
				bool *skipped_objects)
{
  ObjectStore::Transaction tran;
  ObjectStore::Transaction *t = &tran;
  auto ebliter = bl.cbegin();
  object_begin ob;
  ob.decode(ebliter);

  if (ob.hoid.hobj.is_temp()) {
    cerr << "ERROR: Export contains temporary object '" << ob.hoid << "'" << std::endl;
    return -EFAULT;
  }
  ceph_assert(g_ceph_context);

  auto ch = store->open_collection(coll);
  if (ob.hoid.hobj.nspace != g_ceph_context->_conf->osd_hit_set_namespace) {
    object_t oid = ob.hoid.hobj.oid;
    object_locator_t loc(ob.hoid.hobj);
    pg_t raw_pgid = origmap.object_locator_to_pg(oid, loc);
    pg_t pgid = origmap.raw_pg_to_pg(raw_pgid);

    spg_t coll_pgid;
    if (coll.is_pg(&coll_pgid) == false) {
      cerr << "INTERNAL ERROR: Bad collection during import" << std::endl;
      return -EFAULT;
    }
    if (coll_pgid.shard != ob.hoid.shard_id) {
      cerr << "INTERNAL ERROR: Importing shard " << coll_pgid.shard
        << " but object shard is " << ob.hoid.shard_id << std::endl;
      return -EFAULT;
    }

    if (coll_pgid.pgid != pgid) {
      cerr << "Skipping object '" << ob.hoid << "' which belongs in pg " << pgid << std::endl;
      *skipped_objects = true;
      skip_object(bl);
      return 0;
    }
  }

  if (!dry_run)
    t->touch(coll, ob.hoid);

  cout << "Write " << ob.hoid << std::endl;

  bufferlist ebl;
  bool done = false;
  while(!done) {
    sectiontype_t type;
    int ret = read_section(&type, &ebl);
    if (ret)
      return ret;

    //cout << "\tdo_object: Section type " << hex << type << dec << std::endl;
    //cout << "\t\tsection size " << ebl.length() << std::endl;
    if (type >= END_OF_TYPES) {
      cout << "Skipping unknown object section type" << std::endl;
      continue;
    }
    switch(type) {
    case TYPE_DATA:
      if (dry_run) break;
      ret = get_data(store, coll, ob.hoid, t, ebl);
      if (ret) return ret;
      break;
    case TYPE_ATTRS:
      if (dry_run) break;
      ret = get_attrs(store, coll, ob.hoid, t, ebl, driver, mapper);
      if (ret) return ret;
      break;
    case TYPE_OMAP_HDR:
      if (dry_run) break;
      ret = get_omap_hdr(store, coll, ob.hoid, t, ebl);
      if (ret) return ret;
      break;
    case TYPE_OMAP:
      if (dry_run) break;
      ret = get_omap(store, coll, ob.hoid, t, ebl);
      if (ret) return ret;
      break;
    case TYPE_OBJECT_END:
      done = true;
      break;
    default:
      cerr << "Unknown section type " << type << std::endl;
      return -EFAULT;
    }
  }
  if (!dry_run) {
    wait_until_done(t, [&] {
      store->queue_transaction(ch, std::move(*t));
      ch->flush();
    });
  }
  return 0;
}

int dump_pg_metadata(Formatter *formatter, bufferlist &bl, metadata_section &ms)
{
  auto ebliter = bl.cbegin();
  ms.decode(ebliter);

  formatter->open_object_section("metadata_section");

  formatter->dump_unsigned("pg_disk_version", (int)ms.struct_ver);
  formatter->dump_unsigned("map_epoch", ms.map_epoch);

  formatter->open_object_section("OSDMap");
  ms.osdmap.dump(formatter);
  formatter->close_section();
  formatter->flush(cout);
  cout << std::endl;

  formatter->open_object_section("info");
  ms.info.dump(formatter);
  formatter->close_section();
  formatter->flush(cout);

  formatter->open_object_section("log");
  ms.log.dump(formatter);
  formatter->close_section();
  formatter->flush(cout);

  formatter->open_object_section("pg_missing_t");
  ms.missing.dump(formatter);
  formatter->close_section();

  // XXX: ms.past_intervals?

  formatter->close_section();
  formatter->flush(cout);

  if (ms.osdmap.get_epoch() != 0 && ms.map_epoch != ms.osdmap.get_epoch()) {
    cerr << "FATAL: Invalid OSDMap epoch in export data" << std::endl;
    return -EFAULT;
  }

  return 0;
}

int get_pg_metadata(ObjectStore *store, bufferlist &bl, metadata_section &ms,
    const OSDSuperblock& sb, spg_t pgid)
{
  auto ebliter = bl.cbegin();
  ms.decode(ebliter);
  spg_t old_pgid = ms.info.pgid;
  ms.info.pgid = pgid;

  if (debug) {
    cout << "export pgid " << old_pgid << std::endl;
    cout << "struct_v " << (int)ms.struct_ver << std::endl;
    cout << "map epoch " << ms.map_epoch << std::endl;

#ifdef DIAGNOSTIC
    Formatter *formatter = new JSONFormatter(true);
    formatter->open_object_section("stuff");

    formatter->open_object_section("importing OSDMap");
    ms.osdmap.dump(formatter);
    formatter->close_section();
    formatter->flush(cout);
    cout << std::endl;

    cout << "osd current epoch " << sb.current_epoch << std::endl;

    formatter->open_object_section("info");
    ms.info.dump(formatter);
    formatter->close_section();
    formatter->flush(cout);
    cout << std::endl;

    formatter->open_object_section("log");
    ms.log.dump(formatter);
    formatter->close_section();
    formatter->flush(cout);
    cout << std::endl;

    formatter->close_section();
    formatter->flush(cout);
    cout << std::endl;
#endif
  }

  if (ms.osdmap.get_epoch() != 0 && ms.map_epoch != ms.osdmap.get_epoch()) {
    cerr << "FATAL: Invalid OSDMap epoch in export data" << std::endl;
    return -EFAULT;
  }

  if (ms.map_epoch > sb.current_epoch) {
    cerr << "ERROR: Export PG's map_epoch " << ms.map_epoch << " > OSD's epoch " << sb.current_epoch << std::endl;
    cerr << "The OSD you are using is older than the exported PG" << std::endl;
    cerr << "Either use another OSD or join selected OSD to cluster to update it first" << std::endl;
    return -EINVAL;
  }

  // Old exports didn't include OSDMap
  if (ms.osdmap.get_epoch() == 0) {
    cerr << "WARNING: No OSDMap in old export, this is an ancient export."
      " Not supported." << std::endl;
    return -EINVAL;
  }

  if (ms.osdmap.get_epoch() < sb.oldest_map) {
    cerr << "PG export's map " << ms.osdmap.get_epoch()
	 << " is older than OSD's oldest_map " << sb.oldest_map << std::endl;
    if (!force) {
      cerr << " pass --force to proceed anyway (with incomplete PastIntervals)"
	   << std::endl;
      return -EINVAL;
    }
  }
  if (debug) {
    cerr << "Import pgid " << ms.info.pgid << std::endl;
    cerr << "Previous past_intervals " << ms.past_intervals << std::endl;
    cerr << "history.same_interval_since "
	 << ms.info.history.same_interval_since << std::endl;
  }

  return 0;
}

// out: pg_log_t that only has entries that apply to import_pgid using curmap
// reject: Entries rejected from "in" are in the reject.log.  Other fields not set.
void filter_divergent_priors(spg_t import_pgid, const OSDMap &curmap,
  const string &hit_set_namespace, const divergent_priors_t &in,
  divergent_priors_t &out, divergent_priors_t &reject)
{
  out.clear();
  reject.clear();

  for (divergent_priors_t::const_iterator i = in.begin();
       i != in.end(); ++i) {

    // Reject divergent priors for temporary objects
    if (i->second.is_temp()) {
      reject.insert(*i);
      continue;
    }

    if (i->second.nspace != hit_set_namespace) {
      object_t oid = i->second.oid;
      object_locator_t loc(i->second);
      pg_t raw_pgid = curmap.object_locator_to_pg(oid, loc);
      pg_t pgid = curmap.raw_pg_to_pg(raw_pgid);

      if (import_pgid.pgid == pgid) {
        out.insert(*i);
      } else {
        reject.insert(*i);
      }
    } else {
      out.insert(*i);
    }
  }
}

int ObjectStoreTool::dump_export(Formatter *formatter)
{
  bufferlist ebl;
  pg_info_t info;
  PGLog::IndexedLog log;
  //bool skipped_objects = false;

  int ret = read_super();
  if (ret)
    return ret;

  if (sh.magic != super_header::super_magic) {
    cerr << "Invalid magic number" << std::endl;
    return -EFAULT;
  }

  if (sh.version > super_header::super_ver) {
    cerr << "Can't handle export format version=" << sh.version << std::endl;
    return -EINVAL;
  }

  formatter->open_object_section("Export");

  //First section must be TYPE_PG_BEGIN
  sectiontype_t type;
  ret = read_section(&type, &ebl);
  if (ret)
    return ret;
  if (type == TYPE_POOL_BEGIN) {
    cerr << "Dump of pool exports not supported" << std::endl;
    return -EINVAL;
  } else if (type != TYPE_PG_BEGIN) {
    cerr << "Invalid first section type " << std::to_string(type) << std::endl;
    return -EFAULT;
  }

  auto ebliter = ebl.cbegin();
  pg_begin pgb;
  pgb.decode(ebliter);
  spg_t pgid = pgb.pgid;

  formatter->dump_string("pgid", stringify(pgid));
  formatter->dump_string("cluster_fsid", stringify(pgb.superblock.cluster_fsid));
  formatter->dump_string("features", stringify(pgb.superblock.compat_features));

  bool done = false;
  bool found_metadata = false;
  metadata_section ms;
  bool objects_started = false;
  while(!done) {
    ret = read_section(&type, &ebl);
    if (ret)
      return ret;

    if (debug) {
      cerr << "dump_export: Section type " << std::to_string(type) << std::endl;
    }
    if (type >= END_OF_TYPES) {
      cerr << "Skipping unknown section type" << std::endl;
      continue;
    }
    switch(type) {
    case TYPE_OBJECT_BEGIN:
      if (!objects_started) {
	formatter->open_array_section("objects");
	objects_started = true;
      }
      ret = dump_object(formatter, ebl);
      if (ret) return ret;
      break;
    case TYPE_PG_METADATA:
      if (objects_started)
	cerr << "WARNING: metadata_section out of order" << std::endl;
      ret = dump_pg_metadata(formatter, ebl, ms);
      if (ret) return ret;
      found_metadata = true;
      break;
    case TYPE_PG_END:
      if (objects_started) {
	formatter->close_section();
      }
      done = true;
      break;
    default:
      cerr << "Unknown section type " << std::to_string(type) << std::endl;
      return -EFAULT;
    }
  }

  if (!found_metadata) {
    cerr << "Missing metadata section" << std::endl;
    return -EFAULT;
  }

  formatter->close_section();
  formatter->flush(cout);

  return 0;
}

int ObjectStoreTool::do_import(ObjectStore *store, OSDSuperblock& sb,
			       bool force, std::string pgidstr)
{
  bufferlist ebl;
  pg_info_t info;
  PGLog::IndexedLog log;
  bool skipped_objects = false;

  if (!dry_run)
    finish_remove_pgs(store);

  int ret = read_super();
  if (ret)
    return ret;

  if (sh.magic != super_header::super_magic) {
    cerr << "Invalid magic number" << std::endl;
    return -EFAULT;
  }

  if (sh.version > super_header::super_ver) {
    cerr << "Can't handle export format version=" << sh.version << std::endl;
    return -EINVAL;
  }

  //First section must be TYPE_PG_BEGIN
  sectiontype_t type;
  ret = read_section(&type, &ebl);
  if (ret)
    return ret;
  if (type == TYPE_POOL_BEGIN) {
    cerr << "Pool exports cannot be imported into a PG" << std::endl;
    return -EINVAL;
  } else if (type != TYPE_PG_BEGIN) {
    cerr << "Invalid first section type " << std::to_string(type) << std::endl;
    return -EFAULT;
  }

  auto ebliter = ebl.cbegin();
  pg_begin pgb;
  pgb.decode(ebliter);
  spg_t pgid = pgb.pgid;

  if (pgidstr.length()) {
    spg_t user_pgid;

    bool ok = user_pgid.parse(pgidstr.c_str());
    // This succeeded in main() already
    ceph_assert(ok);
    if (pgid != user_pgid) {
      cerr << "specified pgid " << user_pgid
	   << " does not match actual pgid " << pgid << std::endl;
      return -EINVAL;
    }
  }

  if (!pgb.superblock.cluster_fsid.is_zero()
      && pgb.superblock.cluster_fsid != sb.cluster_fsid) {
    cerr << "Export came from different cluster with fsid "
         << pgb.superblock.cluster_fsid << std::endl;
    return -EINVAL;
  }

  if (debug) {
    cerr << "Exported features: " << pgb.superblock.compat_features << std::endl;
  }

  // Special case: Old export has SHARDS incompat feature on replicated pg, removqqe it
  if (pgid.is_no_shard())
    pgb.superblock.compat_features.incompat.remove(CEPH_OSD_FEATURE_INCOMPAT_SHARDS);

  if (sb.compat_features.compare(pgb.superblock.compat_features) == -1) {
    CompatSet unsupported = sb.compat_features.unsupported(pgb.superblock.compat_features);

    cerr << "Export has incompatible features set " << unsupported << std::endl;

    // Let them import if they specify the --force option
    if (!force)
        return 11;  // Positive return means exit status
  }

  // we need the latest OSDMap to check for collisions
  OSDMap curmap;
  bufferlist bl;
  ret = get_osdmap(store, sb.current_epoch, curmap, bl);
  if (ret) {
    cerr << "Can't find latest local OSDMap " << sb.current_epoch << std::endl;
    return ret;
  }
  if (!curmap.have_pg_pool(pgid.pgid.m_pool)) {
    cerr << "Pool " << pgid.pgid.m_pool << " no longer exists" << std::endl;
    // Special exit code for this error, used by test code
    return 10;  // Positive return means exit status
  }

  pool_pg_num_history_t pg_num_history;
  get_pg_num_history(store, &pg_num_history);

  ghobject_t pgmeta_oid = pgid.make_pgmeta_oid();

  // Check for PG already present.
  coll_t coll(pgid);
  if (store->collection_exists(coll)) {
    cerr << "pgid " << pgid << " already exists" << std::endl;
    return -EEXIST;
  }

  ObjectStore::CollectionHandle ch;

  OSDriver driver(
    store,
    coll_t(),
    OSD::make_snapmapper_oid());
  SnapMapper mapper(g_ceph_context, &driver, 0, 0, 0, pgid.shard);

  cout << "Importing pgid " << pgid;
  cout << std::endl;

  bool done = false;
  bool found_metadata = false;
  metadata_section ms;
  while(!done) {
    ret = read_section(&type, &ebl);
    if (ret)
      return ret;

    if (debug) {
      cout << __func__ << ": Section type " << std::to_string(type) << std::endl;
    }
    if (type >= END_OF_TYPES) {
      cout << "Skipping unknown section type" << std::endl;
      continue;
    }
    switch(type) {
    case TYPE_OBJECT_BEGIN:
      ceph_assert(found_metadata);
      ret = get_object(store, driver, mapper, coll, ebl, ms.osdmap,
		       &skipped_objects);
      if (ret) return ret;
      break;
    case TYPE_PG_METADATA:
      ret = get_pg_metadata(store, ebl, ms, sb, pgid);
      if (ret) return ret;
      found_metadata = true;

      if (pgid != ms.info.pgid) {
	cerr << "specified pgid " << pgid << " does not match import file pgid "
	     << ms.info.pgid << std::endl;
	return -EINVAL;
      }

      // make sure there are no conflicting splits or merges
      if (ms.osdmap.have_pg_pool(pgid.pgid.pool())) {
	auto p = pg_num_history.pg_nums.find(pgid.pgid.m_pool);
	if (p != pg_num_history.pg_nums.end() &&
	    !p->second.empty()) {
	  unsigned start_pg_num = ms.osdmap.get_pg_num(pgid.pgid.pool());
	  unsigned pg_num = start_pg_num;
	  for (auto q = p->second.lower_bound(ms.map_epoch);
	       q != p->second.end();
	       ++q) {
	    unsigned new_pg_num = q->second;
	    cout << "pool " << pgid.pgid.pool() << " pg_num " << pg_num
		 << " -> " << new_pg_num << std::endl;

	    // check for merge target
	    spg_t target;
	    if (pgid.is_merge_source(pg_num, new_pg_num, &target)) {
	      // FIXME: this checks assumes the OSD's PG is at the OSD's
	      // map epoch; it could be, say, at *our* epoch, pre-merge.
	      coll_t coll(target);
	      if (store->collection_exists(coll)) {
		cerr << "pgid " << pgid << " merges to target " << target
		     << " which already exists" << std::endl;
		return 12;
	      }
	    }

	    // check for split children
	    set<spg_t> children;
	    if (pgid.is_split(start_pg_num, new_pg_num, &children)) {
	      cerr << " children are " << children << std::endl;
	      for (auto child : children) {
		coll_t coll(child);
		if (store->collection_exists(coll)) {
		  cerr << "pgid " << pgid << " splits to " << children
		       << " and " << child << " exists" << std::endl;
		  return 12;
		}
	      }
	    }
	    pg_num = new_pg_num;
	  }
	}
      } else {
	cout << "pool " << pgid.pgid.pool() << " doesn't existing, not checking"
	     << " for splits or mergers" << std::endl;
      }

      if (!dry_run) {
	ObjectStore::Transaction t;
	ch = store->create_new_collection(coll);
	PG::_create(
	  t, pgid,
	  pgid.get_split_bits(ms.osdmap.get_pg_pool(pgid.pool())->get_pg_num()));
	PG::_init(t, pgid, NULL);

	// mark this coll for removal until we're done
	map<string,bufferlist> values;
	encode((char)1, values["_remove"]);
	t.omap_setkeys(coll, pgid.make_pgmeta_oid(), values);

	store->queue_transaction(ch, std::move(t));
      }

      break;
    case TYPE_PG_END:
      ceph_assert(found_metadata);
      done = true;
      break;
    default:
      cerr << "Unknown section type " << std::to_string(type) << std::endl;
      return -EFAULT;
    }
  }

  if (!found_metadata) {
    cerr << "Missing metadata section" << std::endl;
    return -EFAULT;
  }

  ObjectStore::Transaction t;
  if (!dry_run) {
    pg_log_t newlog, reject;
    pg_log_t::filter_log(pgid, ms.osdmap, g_ceph_context->_conf->osd_hit_set_namespace,
      ms.log, newlog, reject);
    if (debug) {
      for (list<pg_log_entry_t>::iterator i = newlog.log.begin();
           i != newlog.log.end(); ++i)
        cerr << "Keeping log entry " << *i << std::endl;
      for (list<pg_log_entry_t>::iterator i = reject.log.begin();
           i != reject.log.end(); ++i)
        cerr << "Skipping log entry " << *i << std::endl;
    }

    divergent_priors_t newdp, rejectdp;
    filter_divergent_priors(pgid, ms.osdmap, g_ceph_context->_conf->osd_hit_set_namespace,
      ms.divergent_priors, newdp, rejectdp);
    ms.divergent_priors = newdp;
    if (debug) {
      for (divergent_priors_t::iterator i = newdp.begin();
           i != newdp.end(); ++i)
        cerr << "Keeping divergent_prior " << *i << std::endl;
      for (divergent_priors_t::iterator i = rejectdp.begin();
           i != rejectdp.end(); ++i)
        cerr << "Skipping divergent_prior " << *i << std::endl;
    }

    ms.missing.filter_objects([&](const hobject_t &obj) {
	if (obj.nspace == g_ceph_context->_conf->osd_hit_set_namespace)
	  return false;
	ceph_assert(!obj.is_temp());
	object_t oid = obj.oid;
	object_locator_t loc(obj);
	pg_t raw_pgid = ms.osdmap.object_locator_to_pg(oid, loc);
	pg_t _pgid = ms.osdmap.raw_pg_to_pg(raw_pgid);

	return pgid.pgid != _pgid;
      });


    if (debug) {
      pg_missing_t missing;
      Formatter *formatter = Formatter::create("json-pretty");
      dump_log(formatter, cerr, newlog, ms.missing);
      delete formatter;
    }

    // Just like a split invalidate stats since the object count is changed
    if (skipped_objects)
      ms.info.stats.stats_invalid = true;

    ret = write_pg(
      t,
      ms.map_epoch,
      ms.info,
      newlog,
      ms.past_intervals,
      ms.divergent_priors,
      ms.missing);
    if (ret) return ret;
  }

  // done, clear removal flag
  if (debug)
    cerr << "done, clearing removal flag" << std::endl;

  if (!dry_run) {
    set<string> remove;
    remove.insert("_remove");
    t.omap_rmkeys(coll, pgid.make_pgmeta_oid(), remove);
    wait_until_done(&t, [&] {
      store->queue_transaction(ch, std::move(t));
      // make sure we flush onreadable items before mapper/driver are destroyed.
      ch->flush();
    });
  }
  return 0;
}

int do_list(ObjectStore *store, string pgidstr, string object, boost::optional<std::string> nspace,
	    Formatter *formatter, bool debug, bool human_readable, bool head)
{
  int r;
  lookup_ghobject lookup(object, nspace, head);
  if (pgidstr.length() > 0) {
    r = action_on_all_objects_in_pg(store, pgidstr, lookup, debug);
  } else {
    r = action_on_all_objects(store, lookup, debug);
  }
  if (r)
    return r;
  lookup.dump(formatter, human_readable);
  formatter->flush(cout);
  return 0;
}

int do_meta(ObjectStore *store, string object, Formatter *formatter, bool debug, bool human_readable)
{
  int r;
  boost::optional<std::string> nspace; // Not specified
  lookup_ghobject lookup(object, nspace);
  r = action_on_all_objects_in_exact_pg(store, coll_t::meta(), lookup, debug);
  if (r)
    return r;
  lookup.dump(formatter, human_readable);
  formatter->flush(cout);
  return 0;
}

enum rmtype {
  BOTH,
  SNAPMAP,
  NOSNAPMAP
};

int remove_object(coll_t coll, ghobject_t &ghobj,
  SnapMapper &mapper,
  MapCacher::Transaction<std::string, bufferlist> *_t,
  ObjectStore::Transaction *t,
  enum rmtype type)
{
  if (type == BOTH || type == SNAPMAP) {
    int r = mapper.remove_oid(ghobj.hobj, _t);
    if (r < 0 && r != -ENOENT) {
      cerr << "remove_oid returned " << cpp_strerror(r) << std::endl;
      return r;
    }
  }

  if (type == BOTH || type == NOSNAPMAP) {
    t->remove(coll, ghobj);
  }
  return 0;
}

int get_snapset(ObjectStore *store, coll_t coll, ghobject_t &ghobj, SnapSet &ss, bool silent);

int do_remove_object(ObjectStore *store, coll_t coll,
		     ghobject_t &ghobj, bool all, bool force, enum rmtype type)
{
  auto ch = store->open_collection(coll);
  spg_t pg;
  coll.is_pg_prefix(&pg);
  OSDriver driver(
    store,
    coll_t(),
    OSD::make_snapmapper_oid());
  SnapMapper mapper(g_ceph_context, &driver, 0, 0, 0, pg.shard);
  struct stat st;

  int r = store->stat(ch, ghobj, &st);
  if (r < 0) {
    cerr << "remove: " << cpp_strerror(r) << std::endl;
    return r;
  }

  SnapSet ss;
  if (ghobj.hobj.has_snapset()) {
    r = get_snapset(store, coll, ghobj, ss, false);
    if (r < 0) {
      cerr << "Can't get snapset error " << cpp_strerror(r) << std::endl;
      return r;
    }
    if (!ss.snaps.empty() && !all) {
      if (force) {
        cout << "WARNING: only removing "
             << (ghobj.hobj.is_head() ? "head" : "snapdir")
             << " with snapshots present" << std::endl;
        ss.snaps.clear();
      } else {
        cerr << "Snapshots are present, use removeall to delete everything" << std::endl;
        return -EINVAL;
      }
    }
  }

  ObjectStore::Transaction t;
  OSDriver::OSTransaction _t(driver.get_transaction(&t));

  ghobject_t snapobj = ghobj;
  for (vector<snapid_t>::iterator i = ss.snaps.begin() ;
       i != ss.snaps.end() ; ++i) {
    snapobj.hobj.snap = *i;
    cout << "remove " << snapobj << std::endl;
    if (!dry_run) {
      r = remove_object(coll, snapobj, mapper, &_t, &t, type);
      if (r < 0)
        return r;
    }
  }

  cout << "remove " << ghobj << std::endl;

  if (!dry_run) {
    r = remove_object(coll, ghobj, mapper, &_t, &t, type);
    if (r < 0)
      return r;
  }

  if (!dry_run) {
    wait_until_done(&t, [&] {
      store->queue_transaction(ch, std::move(t));
      ch->flush();
    });
  }
  return 0;
}

int do_list_attrs(ObjectStore *store, coll_t coll, ghobject_t &ghobj)
{
  auto ch = store->open_collection(coll);
  map<string,bufferptr> aset;
  int r = store->getattrs(ch, ghobj, aset);
  if (r < 0) {
    cerr << "getattrs: " << cpp_strerror(r) << std::endl;
    return r;
  }

  for (map<string,bufferptr>::iterator i = aset.begin();i != aset.end(); ++i) {
    string key(i->first);
    if (outistty)
      key = cleanbin(key);
    cout << key << std::endl;
  }
  return 0;
}

int do_list_omap(ObjectStore *store, coll_t coll, ghobject_t &ghobj)
{
  auto ch = store->open_collection(coll);
  ObjectMap::ObjectMapIterator iter = store->get_omap_iterator(ch, ghobj);
  if (!iter) {
    cerr << "omap_get_iterator: " << cpp_strerror(ENOENT) << std::endl;
    return -ENOENT;
  }
  iter->seek_to_first();
  map<string, bufferlist> oset;
  while(iter->valid()) {
    get_omap_batch(iter, oset);

    for (map<string,bufferlist>::iterator i = oset.begin();i != oset.end(); ++i) {
      string key(i->first);
      if (outistty)
        key = cleanbin(key);
      cout << key << std::endl;
    }
  }
  return 0;
}

int do_get_bytes(ObjectStore *store, coll_t coll, ghobject_t &ghobj, int fd)
{
  auto ch = store->open_collection(coll);
  struct stat st;
  mysize_t total;

  int ret = store->stat(ch, ghobj, &st);
  if (ret < 0) {
    cerr << "get-bytes: " << cpp_strerror(ret) << std::endl;
    return ret;
  }

  total = st.st_size;
  if (debug)
    cerr << "size=" << total << std::endl;

  uint64_t offset = 0;
  bufferlist rawdatabl;
  while(total > 0) {
    rawdatabl.clear();
    mysize_t len = max_read;
    if (len > total)
      len = total;

    ret = store->read(ch, ghobj, offset, len, rawdatabl);
    if (ret < 0)
      return ret;
    if (ret == 0)
      return -EINVAL;

    if (debug)
      cerr << "data section offset=" << offset << " len=" << len << std::endl;

    total -= ret;
    offset += ret;

    ret = write(fd, rawdatabl.c_str(), ret);
    if (ret == -1) {
      perror("write");
      return -errno;
    }
  }

  return 0;
}

int do_set_bytes(ObjectStore *store, coll_t coll,
		 ghobject_t &ghobj, int fd)
{
  ObjectStore::Transaction tran;
  ObjectStore::Transaction *t = &tran;

  if (debug)
    cerr << "Write " << ghobj << std::endl;

  if (!dry_run) {
    t->touch(coll, ghobj);
    t->truncate(coll, ghobj, 0);
  }

  uint64_t offset = 0;
  bufferlist rawdatabl;
  do {
    rawdatabl.clear();
    ssize_t bytes = rawdatabl.read_fd(fd, max_read);
    if (bytes < 0) {
      cerr << "read_fd error " << cpp_strerror(bytes) << std::endl;
      return bytes;
    }

    if (bytes == 0)
      break;

    if (debug)
      cerr << "\tdata: offset " << offset << " bytes " << bytes << std::endl;
    if (!dry_run)
      t->write(coll, ghobj, offset, bytes,  rawdatabl);

    offset += bytes;
    // XXX: Should we queue_transaction() every once in a while for very large files
  } while(true);

  auto ch = store->open_collection(coll);
  if (!dry_run)
    store->queue_transaction(ch, std::move(*t));
  return 0;
}

int do_get_attr(ObjectStore *store, coll_t coll, ghobject_t &ghobj, string key)
{
  auto ch = store->open_collection(coll);
  bufferptr bp;

  int r = store->getattr(ch, ghobj, key.c_str(), bp);
  if (r < 0) {
    cerr << "getattr: " << cpp_strerror(r) << std::endl;
    return r;
  }

  string value(bp.c_str(), bp.length());
  if (outistty) {
    value = cleanbin(value);
    value.push_back('\n');
  }
  cout << value;

  return 0;
}

int do_set_attr(ObjectStore *store, coll_t coll,
		ghobject_t &ghobj, string key, int fd)
{
  ObjectStore::Transaction tran;
  ObjectStore::Transaction *t = &tran;
  bufferlist bl;

  if (debug)
    cerr << "Setattr " << ghobj << std::endl;

  int ret = get_fd_data(fd, bl);
  if (ret < 0)
    return ret;

  if (dry_run)
    return 0;

  t->touch(coll, ghobj);

  t->setattr(coll, ghobj, key,  bl);

  auto ch = store->open_collection(coll);
  store->queue_transaction(ch, std::move(*t));
  return 0;
}

int do_rm_attr(ObjectStore *store, coll_t coll,
	       ghobject_t &ghobj, string key)
{
  ObjectStore::Transaction tran;
  ObjectStore::Transaction *t = &tran;

  if (debug)
    cerr << "Rmattr " << ghobj << std::endl;

  if (dry_run)
    return 0;

  t->rmattr(coll, ghobj, key);

  auto ch = store->open_collection(coll);
  store->queue_transaction(ch, std::move(*t));
  return 0;
}

int do_get_omap(ObjectStore *store, coll_t coll, ghobject_t &ghobj, string key)
{
  auto ch = store->open_collection(coll);
  set<string> keys;
  map<string, bufferlist> out;

  keys.insert(key);

  int r = store->omap_get_values(ch, ghobj, keys, &out);
  if (r < 0) {
    cerr << "omap_get_values: " << cpp_strerror(r) << std::endl;
    return r;
  }

  if (out.empty()) {
    cerr << "Key not found" << std::endl;
    return -ENOENT;
  }

  ceph_assert(out.size() == 1);

  bufferlist bl = out.begin()->second;
  string value(bl.c_str(), bl.length());
  if (outistty) {
    value = cleanbin(value);
    value.push_back('\n');
  }
  cout << value;

  return 0;
}

int do_set_omap(ObjectStore *store, coll_t coll,
		ghobject_t &ghobj, string key, int fd)
{
  ObjectStore::Transaction tran;
  ObjectStore::Transaction *t = &tran;
  map<string, bufferlist> attrset;
  bufferlist valbl;

  if (debug)
    cerr << "Set_omap " << ghobj << std::endl;

  int ret = get_fd_data(fd, valbl);
  if (ret < 0)
    return ret;

  attrset.insert(pair<string, bufferlist>(key, valbl));

  if (dry_run)
    return 0;

  t->touch(coll, ghobj);

  t->omap_setkeys(coll, ghobj, attrset);

  auto ch = store->open_collection(coll);
  store->queue_transaction(ch, std::move(*t));
  return 0;
}

int do_rm_omap(ObjectStore *store, coll_t coll,
	       ghobject_t &ghobj, string key)
{
  ObjectStore::Transaction tran;
  ObjectStore::Transaction *t = &tran;
  set<string> keys;

  keys.insert(key);

  if (debug)
    cerr << "Rm_omap " << ghobj << std::endl;

  if (dry_run)
    return 0;

  t->omap_rmkeys(coll, ghobj, keys);

  auto ch = store->open_collection(coll);
  store->queue_transaction(ch, std::move(*t));
  return 0;
}

int do_get_omaphdr(ObjectStore *store, coll_t coll, ghobject_t &ghobj)
{
  auto ch = store->open_collection(coll);
  bufferlist hdrbl;

  int r = store->omap_get_header(ch, ghobj, &hdrbl, true);
  if (r < 0) {
    cerr << "omap_get_header: " << cpp_strerror(r) << std::endl;
    return r;
  }

  string header(hdrbl.c_str(), hdrbl.length());
  if (outistty) {
    header = cleanbin(header);
    header.push_back('\n');
  }
  cout << header;

  return 0;
}

int do_set_omaphdr(ObjectStore *store, coll_t coll,
		   ghobject_t &ghobj, int fd)
{
  ObjectStore::Transaction tran;
  ObjectStore::Transaction *t = &tran;
  bufferlist hdrbl;

  if (debug)
    cerr << "Omap_setheader " << ghobj << std::endl;

  int ret = get_fd_data(fd, hdrbl);
  if (ret)
    return ret;

  if (dry_run)
    return 0;

  t->touch(coll, ghobj);

  t->omap_setheader(coll, ghobj, hdrbl);

  auto ch = store->open_collection(coll);
  store->queue_transaction(ch, std::move(*t));
  return 0;
}

struct do_fix_lost : public action_on_object_t {
  void call(ObjectStore *store, coll_t coll,
		   ghobject_t &ghobj, object_info_t &oi) override {
    if (oi.is_lost()) {
      cout << coll << "/" << ghobj << " is lost";
      if (!dry_run)
        cout << ", fixing";
      cout << std::endl;
      if (dry_run)
        return;
      oi.clear_flag(object_info_t::FLAG_LOST);
      bufferlist bl;
      encode(oi, bl, -1);  /* fixme: using full features */
      ObjectStore::Transaction t;
      t.setattr(coll, ghobj, OI_ATTR, bl);
      auto ch = store->open_collection(coll);
      store->queue_transaction(ch, std::move(t));
    }
    return;
  }
};

int get_snapset(ObjectStore *store, coll_t coll, ghobject_t &ghobj, SnapSet &ss, bool silent = false)
{
  auto ch = store->open_collection(coll);
  bufferlist attr;
  int r = store->getattr(ch, ghobj, SS_ATTR, attr);
  if (r < 0) {
    if (!silent)
      cerr << "Error getting snapset on : " << make_pair(coll, ghobj) << ", "
	   << cpp_strerror(r) << std::endl;
    return r;
  }
  auto bp = attr.cbegin();
  try {
    decode(ss, bp);
  } catch (...) {
    r = -EINVAL;
    cerr << "Error decoding snapset on : " << make_pair(coll, ghobj) << ", "
         << cpp_strerror(r) << std::endl;
    return r;
  }
  return 0;
}

int print_obj_info(ObjectStore *store, coll_t coll, ghobject_t &ghobj, Formatter* formatter)
{
  auto ch = store->open_collection(coll);
  int r = 0;
  formatter->open_object_section("obj");
  formatter->open_object_section("id");
  ghobj.dump(formatter);
  formatter->close_section();

  bufferlist attr;
  int gr = store->getattr(ch, ghobj, OI_ATTR, attr);
  if (gr < 0) {
    r = gr;
    cerr << "Error getting attr on : " << make_pair(coll, ghobj) << ", "
       << cpp_strerror(r) << std::endl;
  } else {
    object_info_t oi;
    auto bp = attr.cbegin();
    try {
      decode(oi, bp);
      formatter->open_object_section("info");
      oi.dump(formatter);
      formatter->close_section();
    } catch (...) {
      r = -EINVAL;
      cerr << "Error decoding attr on : " << make_pair(coll, ghobj) << ", "
           << cpp_strerror(r) << std::endl;
    }
  }
  struct stat st;
  int sr =  store->stat(ch, ghobj, &st, true);
  if (sr < 0) {
    r = sr;
    cerr << "Error stat on : " << make_pair(coll, ghobj) << ", "
         << cpp_strerror(r) << std::endl;
  } else {
    formatter->open_object_section("stat");
    formatter->dump_int("size", st.st_size);
    formatter->dump_int("blksize", st.st_blksize);
    formatter->dump_int("blocks", st.st_blocks);
    formatter->dump_int("nlink", st.st_nlink);
    formatter->close_section();
  }

  if (ghobj.hobj.has_snapset()) {
    SnapSet ss;
    int snr = get_snapset(store, coll, ghobj, ss);
    if (snr < 0) {
      r = snr;
    } else {
      formatter->open_object_section("SnapSet");
      ss.dump(formatter);
      formatter->close_section();
    }
  }
  bufferlist hattr;
  gr = store->getattr(ch, ghobj, ECUtil::get_hinfo_key(), hattr);
  if (gr == 0) {
    ECUtil::HashInfo hinfo;
    auto hp = hattr.cbegin();
    try {
      decode(hinfo, hp);
      formatter->open_object_section("hinfo");
      hinfo.dump(formatter);
      formatter->close_section();
    } catch (...) {
      r = -EINVAL;
      cerr << "Error decoding hinfo on : " << make_pair(coll, ghobj) << ", "
           << cpp_strerror(r) << std::endl;
    }
  }
  formatter->close_section();
  formatter->flush(cout);
  cout << std::endl;
  return r;
}

int corrupt_info(ObjectStore *store, coll_t coll, ghobject_t &ghobj, Formatter* formatter)
{
  auto ch = store->open_collection(coll);
  bufferlist attr;
  int r = store->getattr(ch, ghobj, OI_ATTR, attr);
  if (r < 0) {
    cerr << "Error getting attr on : " << make_pair(coll, ghobj) << ", "
       << cpp_strerror(r) << std::endl;
    return r;
  }
  object_info_t oi;
  auto bp = attr.cbegin();
  try {
    decode(oi, bp);
  } catch (...) {
    r = -EINVAL;
    cerr << "Error getting attr on : " << make_pair(coll, ghobj) << ", "
         << cpp_strerror(r) << std::endl;
    return r;
  }
  if (!dry_run) {
    attr.clear();
    oi.alloc_hint_flags += 0xff;
    ObjectStore::Transaction t;
    encode(oi, attr, -1);  /* fixme: using full features */
    t.setattr(coll, ghobj, OI_ATTR, attr);
    auto ch = store->open_collection(coll);
    r = store->queue_transaction(ch, std::move(t));
    if (r < 0) {
      cerr << "Error writing object info: " << make_pair(coll, ghobj) << ", "
         << cpp_strerror(r) << std::endl;
      return r;
    }
  }
  return 0;
}

int set_size(
  ObjectStore *store, coll_t coll, ghobject_t &ghobj, uint64_t setsize, Formatter* formatter,
  bool corrupt)
{
  auto ch = store->open_collection(coll);
  if (ghobj.hobj.is_snapdir()) {
    cerr << "Can't set the size of a snapdir" << std::endl;
    return -EINVAL;
  }
  bufferlist attr;
  int r = store->getattr(ch, ghobj, OI_ATTR, attr);
  if (r < 0) {
    cerr << "Error getting attr on : " << make_pair(coll, ghobj) << ", "
       << cpp_strerror(r) << std::endl;
    return r;
  }
  object_info_t oi;
  auto bp = attr.cbegin();
  try {
    decode(oi, bp);
  } catch (...) {
    r = -EINVAL;
    cerr << "Error getting attr on : " << make_pair(coll, ghobj) << ", "
         << cpp_strerror(r) << std::endl;
    return r;
  }
  struct stat st;
  r =  store->stat(ch, ghobj, &st, true);
  if (r < 0) {
    cerr << "Error stat on : " << make_pair(coll, ghobj) << ", "
         << cpp_strerror(r) << std::endl;
  }
  ghobject_t head(ghobj);
  SnapSet ss;
  bool found_head = true;
  map<snapid_t, uint64_t>::iterator csi;
  bool is_snap = ghobj.hobj.is_snap();
  if (is_snap) {
    head.hobj = head.hobj.get_head();
    r = get_snapset(store, coll, head, ss, true);
    if (r < 0 && r != -ENOENT) {
      // Requested get_snapset() silent, so if not -ENOENT show error
      cerr << "Error getting snapset on : " << make_pair(coll, head) << ", "
	   << cpp_strerror(r) << std::endl;
      return r;
    }
    if (r == -ENOENT) {
      head.hobj = head.hobj.get_snapdir();
      r = get_snapset(store, coll, head, ss);
      if (r < 0)
        return r;
      found_head = false;
    } else {
      found_head = true;
    }
    csi = ss.clone_size.find(ghobj.hobj.snap);
    if (csi == ss.clone_size.end()) {
      cerr << "SnapSet is missing clone_size for snap " << ghobj.hobj.snap << std::endl;
      return -EINVAL;
    }
  }
  if ((uint64_t)st.st_size == setsize && oi.size == setsize
       && (!is_snap || csi->second == setsize)) {
    cout << "Size of object is already " << setsize << std::endl;
    return 0;
  }
  cout << "Setting size to " << setsize << ", stat size " << st.st_size
       << ", obj info size " << oi.size;
  if (is_snap) {
    cout << ", " << (found_head ? "head" : "snapdir")
	 << " clone_size " << csi->second;
    csi->second = setsize;
  }
  cout << std::endl;
  if (!dry_run) {
    attr.clear();
    oi.size = setsize;
    ObjectStore::Transaction t;
    // Only modify object info if we want to corrupt it
    if (!corrupt && (uint64_t)st.st_size != setsize) {
      t.truncate(coll, ghobj, setsize);
      // Changing objectstore size will invalidate data_digest, so clear it.
      oi.clear_data_digest();
    }
    encode(oi, attr, -1);  /* fixme: using full features */
    t.setattr(coll, ghobj, OI_ATTR, attr);
    if (is_snap) {
      bufferlist snapattr;
      snapattr.clear();
      encode(ss, snapattr);
      t.setattr(coll, head, SS_ATTR, snapattr);
    }
    auto ch = store->open_collection(coll);
    r = store->queue_transaction(ch, std::move(t));
    if (r < 0) {
      cerr << "Error writing object info: " << make_pair(coll, ghobj) << ", "
         << cpp_strerror(r) << std::endl;
      return r;
    }
  }
  return 0;
}

int clear_data_digest(ObjectStore *store, coll_t coll, ghobject_t &ghobj) {
  auto ch = store->open_collection(coll);
  bufferlist attr;
  int r = store->getattr(ch, ghobj, OI_ATTR, attr);
  if (r < 0) {
    cerr << "Error getting attr on : " << make_pair(coll, ghobj) << ", "
       << cpp_strerror(r) << std::endl;
    return r;
  }
  object_info_t oi;
  auto bp = attr.cbegin();
  try {
    decode(oi, bp);
  } catch (...) {
    r = -EINVAL;
    cerr << "Error getting attr on : " << make_pair(coll, ghobj) << ", "
         << cpp_strerror(r) << std::endl;
    return r;
  }
  if (!dry_run) {
    attr.clear();
    oi.clear_data_digest();
    encode(oi, attr, -1); /* fixme: using full features */
    ObjectStore::Transaction t;
    t.setattr(coll, ghobj, OI_ATTR, attr);
    auto ch = store->open_collection(coll);
    r = store->queue_transaction(ch, std::move(t));
    if (r < 0) {
      cerr << "Error writing object info: " << make_pair(coll, ghobj) << ", "
         << cpp_strerror(r) << std::endl;
      return r;
    }
  }
  return 0;
}

int clear_snapset(ObjectStore *store, coll_t coll, ghobject_t &ghobj,
                  string arg)
{
  SnapSet ss;
  int ret = get_snapset(store, coll, ghobj, ss);
  if (ret < 0)
    return ret;

  // Use "corrupt" to clear entire SnapSet
  // Use "seq" to just corrupt SnapSet.seq
  if (arg == "corrupt" || arg == "seq")
    ss.seq = 0;
  // Use "snaps" to just clear SnapSet.snaps
  if (arg == "corrupt" || arg == "snaps")
    ss.snaps.clear();
  // By default just clear clone, clone_overlap and clone_size
  if (arg == "corrupt")
    arg = "";
  if (arg == "" || arg == "clones")
    ss.clones.clear();
  if (arg == "" || arg == "clone_overlap")
    ss.clone_overlap.clear();
  if (arg == "" || arg == "clone_size")
    ss.clone_size.clear();
  // Break all clone sizes by adding 1
  if (arg == "size") {
    for (map<snapid_t, uint64_t>::iterator i = ss.clone_size.begin();
         i != ss.clone_size.end(); ++i)
      ++(i->second);
  }

  if (!dry_run) {
    bufferlist bl;
    encode(ss, bl);
    ObjectStore::Transaction t;
    t.setattr(coll, ghobj, SS_ATTR, bl);
    auto ch = store->open_collection(coll);
    int r = store->queue_transaction(ch, std::move(t));
    if (r < 0) {
      cerr << "Error setting snapset on : " << make_pair(coll, ghobj) << ", "
	   << cpp_strerror(r) << std::endl;
      return r;
    }
  }
  return 0;
}

vector<snapid_t>::iterator find(vector<snapid_t> &v, snapid_t clid)
{
  return std::find(v.begin(), v.end(), clid);
}

map<snapid_t, interval_set<uint64_t> >::iterator
find(map<snapid_t, interval_set<uint64_t> > &m, snapid_t clid)
{
  return m.find(clid);
}

map<snapid_t, uint64_t>::iterator find(map<snapid_t, uint64_t> &m,
				       snapid_t clid)
{
  return m.find(clid);
}

template<class T>
int remove_from(T &mv, string name, snapid_t cloneid, bool force)
{
  typename T::iterator i = find(mv, cloneid);
  if (i != mv.end()) {
    mv.erase(i);
  } else {
    cerr << "Clone " << cloneid << " doesn't exist in " << name;
    if (force) {
      cerr << " (ignored)" << std::endl;
      return 0;
    }
    cerr << std::endl;
    return -EINVAL;
  }
  return 0;
}

int remove_clone(
  ObjectStore *store, coll_t coll, ghobject_t &ghobj, snapid_t cloneid, bool force)
{
  // XXX: Don't allow this if in a cache tier or former cache tier
  // bool allow_incomplete_clones() const {
  // 	return cache_mode != CACHEMODE_NONE || has_flag(FLAG_INCOMPLETE_CLONES);

  SnapSet snapset;
  int ret = get_snapset(store, coll, ghobj, snapset);
  if (ret < 0)
    return ret;

  // Derived from trim_object()
  // ...from snapset
  vector<snapid_t>::iterator p;
  for (p = snapset.clones.begin(); p != snapset.clones.end(); ++p)
    if (*p == cloneid)
      break;
  if (p == snapset.clones.end()) {
    cerr << "Clone " << cloneid << " not present";
    return -ENOENT;
  }
  if (p != snapset.clones.begin()) {
    // not the oldest... merge overlap into next older clone
    vector<snapid_t>::iterator n = p - 1;
    hobject_t prev_coid = ghobj.hobj;
    prev_coid.snap = *n;
    //bool adjust_prev_bytes = is_present_clone(prev_coid);

    //if (adjust_prev_bytes)
    //  ctx->delta_stats.num_bytes -= snapset.get_clone_bytes(*n);

    snapset.clone_overlap[*n].intersection_of(
	snapset.clone_overlap[*p]);

    //if (adjust_prev_bytes)
    //  ctx->delta_stats.num_bytes += snapset.get_clone_bytes(*n);
  }

  ret = remove_from(snapset.clones, "clones", cloneid, force);
  if (ret) return ret;
  ret = remove_from(snapset.clone_overlap, "clone_overlap", cloneid, force);
  if (ret) return ret;
  ret = remove_from(snapset.clone_size, "clone_size", cloneid, force);
  if (ret) return ret;

  if (dry_run)
    return 0;

  bufferlist bl;
  encode(snapset, bl);
  ObjectStore::Transaction t;
  t.setattr(coll, ghobj, SS_ATTR, bl);
  auto ch = store->open_collection(coll);
  int r = store->queue_transaction(ch, std::move(t));
  if (r < 0) {
    cerr << "Error setting snapset on : " << make_pair(coll, ghobj) << ", "
	 << cpp_strerror(r) << std::endl;
    return r;
  }
  cout << "Removal of clone " << cloneid << " complete" << std::endl;
  cout << "Use pg repair after OSD restarted to correct stat information" << std::endl;
  return 0;
}

int dup(string srcpath, ObjectStore *src, string dstpath, ObjectStore *dst)
{
  cout << "dup from " << src->get_type() << ": " << srcpath << "\n"
       << "      to " << dst->get_type() << ": " << dstpath
       << std::endl;
  int num, i;
  vector<coll_t> collections;
  int r;

  r = src->mount();
  if (r < 0) {
    cerr << "failed to mount src: " << cpp_strerror(r) << std::endl;
    return r;
  }
  r = dst->mount();
  if (r < 0) {
    cerr << "failed to mount dst: " << cpp_strerror(r) << std::endl;
    goto out_src;
  }

  if (src->get_fsid() != dst->get_fsid()) {
    cerr << "src fsid " << src->get_fsid() << " != dest " << dst->get_fsid()
	 << std::endl;
    goto out;
  }
  cout << "fsid " << src->get_fsid() << std::endl;

  // make sure dst is empty
  r = dst->list_collections(collections);
  if (r < 0) {
    cerr << "error listing collections on dst: " << cpp_strerror(r) << std::endl;
    goto out;
  }
  if (!collections.empty()) {
    cerr << "destination store is not empty" << std::endl;
    goto out;
  }

  r = src->list_collections(collections);
  if (r < 0) {
    cerr << "error listing collections on src: " << cpp_strerror(r) << std::endl;
    goto out;
  }

  num = collections.size();
  cout << num << " collections" << std::endl;
  i = 1;
  for (auto cid : collections) {
    cout << i++ << "/" << num << " " << cid << std::endl;
    auto ch = src->open_collection(cid);
    auto dch = dst->create_new_collection(cid);
    {
      ObjectStore::Transaction t;
      int bits = src->collection_bits(ch);
      if (bits < 0) {
        if (src->get_type() == "filestore" && cid.is_meta()) {
          bits = 0;
        } else {
          cerr << "cannot get bit count for collection " << cid << ": "
               << cpp_strerror(bits) << std::endl;
          goto out;
        }
      }
      t.create_collection(cid, bits);
      dst->queue_transaction(dch, std::move(t));
    }

    ghobject_t pos;
    uint64_t n = 0;
    uint64_t bytes = 0, keys = 0;
    while (true) {
      vector<ghobject_t> ls;
      r = src->collection_list(ch, pos, ghobject_t::get_max(), 1000, &ls, &pos);
      if (r < 0) {
	cerr << "collection_list on " << cid << " from " << pos << " got: "
	     << cpp_strerror(r) << std::endl;
	goto out;
      }
      if (ls.empty()) {
	break;
      }
      
      for (auto& oid : ls) {
	//cout << "  " << cid << " " << oid << std::endl;
	if (n % 100 == 0) {
	  cout << "  " << std::setw(16) << n << " objects, "
	       << std::setw(16) << bytes << " bytes, "
	       << std::setw(16) << keys << " keys"
	       << std::setw(1) << "\r" << std::flush;
	}
	n++;

	ObjectStore::Transaction t;
	t.touch(cid, oid);

	map<string,bufferptr> attrs;
	src->getattrs(ch, oid, attrs);
	if (!attrs.empty()) {
	  t.setattrs(cid, oid, attrs);
	}

	bufferlist bl;
	src->read(ch, oid, 0, 0, bl);
	if (bl.length()) {
	  t.write(cid, oid, 0, bl.length(), bl);
	  bytes += bl.length();
	}

	bufferlist header;
	map<string,bufferlist> omap;
	src->omap_get(ch, oid, &header, &omap);
	if (header.length()) {
	  t.omap_setheader(cid, oid, header);
	  ++keys;
	}
	if (!omap.empty()) {
	  keys += omap.size();
	  t.omap_setkeys(cid, oid, omap);
	}

	dst->queue_transaction(dch, std::move(t));
      }
    }
    cout << "  " << std::setw(16) << n << " objects, "
	 << std::setw(16) << bytes << " bytes, "
	 << std::setw(16) << keys << " keys"
	 << std::setw(1) << std::endl;
  }

  // keyring
  cout << "keyring" << std::endl;
  {
    bufferlist bl;
    string s = srcpath + "/keyring";
    string err;
    r = bl.read_file(s.c_str(), &err);
    if (r < 0) {
      cerr << "failed to copy " << s << ": " << err << std::endl;
    } else {
      string d = dstpath + "/keyring";
      bl.write_file(d.c_str(), 0600);
    }
  }

  // osd metadata
  cout << "duping osd metadata" << std::endl;
  {
    for (auto k : {"magic", "whoami", "ceph_fsid", "fsid"}) {
      string val;
      src->read_meta(k, &val);
      dst->write_meta(k, val);
    }
  }

  dst->write_meta("ready", "ready");

  cout << "done." << std::endl;
  r = 0;
 out:
  dst->umount();
 out_src:
  src->umount();
  return r;
}

void usage(po::options_description &desc)
{
    cerr << std::endl;
    cerr << desc << std::endl;
    cerr << std::endl;
    cerr << "Positional syntax:" << std::endl;
    cerr << std::endl;
    cerr << "ceph-objectstore-tool ... <object> (get|set)-bytes [file]" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> set-(attr|omap) <key> [file]" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> (get|rm)-(attr|omap) <key>" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> get-omaphdr" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> set-omaphdr [file]" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> list-attrs" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> list-omap" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> remove|removeall" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> dump" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> set-size" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> clear-data-digest" << std::endl;
    cerr << "ceph-objectstore-tool ... <object> remove-clone-metadata <cloneid>" << std::endl;
    cerr << std::endl;
    cerr << "<object> can be a JSON object description as displayed" << std::endl;
    cerr << "by --op list." << std::endl;
    cerr << "<object> can be an object name which will be looked up in all" << std::endl;
    cerr << "the OSD's PGs." << std::endl;
    cerr << "<object> can be the empty string ('') which with a provided pgid " << std::endl;
    cerr << "specifies the pgmeta object" << std::endl;
    cerr << std::endl;
    cerr << "The optional [file] argument will read stdin or write stdout" << std::endl;
    cerr << "if not specified or if '-' specified." << std::endl;
}

bool ends_with(const string& check, const string& ending)
{
    return check.size() >= ending.size() && check.rfind(ending) == (check.size() - ending.size());
}

// Based on FileStore::dump_journal(), set-up enough to only dump
int mydump_journal(Formatter *f, string journalpath, bool m_journal_dio)
{
  int r;

  if (!journalpath.length())
    return -EINVAL;

  FileJournal *journal = new FileJournal(g_ceph_context, uuid_d(), NULL, NULL,
					 journalpath.c_str(), m_journal_dio);
  r = journal->_fdump(*f, false);
  delete journal;
  return r;
}

int apply_layout_settings(ObjectStore *os, const OSDSuperblock &superblock,
			  const string &pool_name, const spg_t &pgid, bool dry_run,
                          int target_level)
{
  int r = 0;

  FileStore *fs = dynamic_cast<FileStore*>(os);
  if (!fs) {
    cerr << "Nothing to do for non-filestore backend" << std::endl;
    return 0; // making this return success makes testing easier
  }

  OSDMap curmap;
  bufferlist bl;
  r = get_osdmap(os, superblock.current_epoch, curmap, bl);
  if (r) {
    cerr << "Can't find local OSDMap: " << cpp_strerror(r) << std::endl;
    return r;
  }

  int64_t poolid = -1;
  if (pool_name.length()) {
    poolid = curmap.lookup_pg_pool_name(pool_name);
    if (poolid < 0) {
      cerr << "Couldn't find pool " << pool_name << ": " << cpp_strerror(poolid)
	   << std::endl;
      return poolid;
    }
  }

  vector<coll_t> collections, filtered_colls;
  r = os->list_collections(collections);
  if (r < 0) {
    cerr << "Error listing collections: " << cpp_strerror(r) << std::endl;
    return r;
  }

  for (auto const &coll : collections) {
    spg_t coll_pgid;
    if (coll.is_pg(&coll_pgid) &&
	((poolid >= 0 && coll_pgid.pool() == (uint64_t)poolid) ||
	 coll_pgid == pgid)) {
      filtered_colls.push_back(coll);
    }
  }

  size_t done = 0, total = filtered_colls.size();
  for (auto const &coll : filtered_colls) {
    if (dry_run) {
      cerr << "Would apply layout settings to " << coll << std::endl;
    } else {
      cerr << "Finished " << done << "/" << total << " collections" << "\r";
      r = fs->apply_layout_settings(coll, target_level);
      if (r < 0) {
	cerr << "Error applying layout settings to " << coll << std::endl;
	return r;
      }
    }
    ++done;
  }

  cerr << "Finished " << total << "/" << total << " collections" << "\r" << std::endl;
  return r;
}

int main(int argc, char **argv)
{
  string dpath, jpath, pgidstr, op, file, mountpoint, mon_store_path, object;
  string target_data_path, fsid;
  string objcmd, arg1, arg2, type, format, argnspace, pool, rmtypestr;
  boost::optional<std::string> nspace;
  spg_t pgid;
  unsigned epoch = 0;
  ghobject_t ghobj;
  bool human_readable;
  Formatter *formatter;
  bool head;

  po::options_description desc("Allowed options");
  desc.add_options()
    ("help", "produce help message")
    ("type", po::value<string>(&type),
     "Arg is one of [bluestore (default), filestore, memstore]")
    ("data-path", po::value<string>(&dpath),
     "path to object store, mandatory")
    ("journal-path", po::value<string>(&jpath),
     "path to journal, use if tool can't find it")
    ("pgid", po::value<string>(&pgidstr),
     "PG id, mandatory for info, log, remove, export, export-remove, mark-complete, trim-pg-log, and mandatory for apply-layout-settings if --pool is not specified")
    ("pool", po::value<string>(&pool),
     "Pool name, mandatory for apply-layout-settings if --pgid is not specified")
    ("op", po::value<string>(&op),
     "Arg is one of [info, log, remove, mkfs, fsck, repair, fuse, dup, export, export-remove, import, list, fix-lost, list-pgs, dump-journal, dump-super, meta-list, "
     "get-osdmap, set-osdmap, get-inc-osdmap, set-inc-osdmap, mark-complete, reset-last-complete, apply-layout-settings, update-mon-db, dump-export, trim-pg-log]")
    ("epoch", po::value<unsigned>(&epoch),
     "epoch# for get-osdmap and get-inc-osdmap, the current epoch in use if not specified")
    ("file", po::value<string>(&file),
     "path of file to export, export-remove, import, get-osdmap, set-osdmap, get-inc-osdmap or set-inc-osdmap")
    ("mon-store-path", po::value<string>(&mon_store_path),
     "path of monstore to update-mon-db")
    ("fsid", po::value<string>(&fsid),
     "fsid for new store created by mkfs")
    ("target-data-path", po::value<string>(&target_data_path),
     "path of target object store (for --op dup)")
    ("mountpoint", po::value<string>(&mountpoint),
     "fuse mountpoint")
    ("format", po::value<string>(&format)->default_value("json-pretty"),
     "Output format which may be json, json-pretty, xml, xml-pretty")
    ("debug", "Enable diagnostic output to stderr")
    ("force", "Ignore some types of errors and proceed with operation - USE WITH CAUTION: CORRUPTION POSSIBLE NOW OR IN THE FUTURE")
    ("skip-journal-replay", "Disable journal replay")
    ("skip-mount-omap", "Disable mounting of omap")
    ("head", "Find head/snapdir when searching for objects by name")
    ("dry-run", "Don't modify the objectstore")
    ("namespace", po::value<string>(&argnspace), "Specify namespace when searching for objects")
    ("rmtype", po::value<string>(&rmtypestr), "Specify corrupting object removal 'snapmap' or 'nosnapmap' - TESTING USE ONLY")
    ;

  po::options_description positional("Positional options");
  positional.add_options()
    ("object", po::value<string>(&object), "'' for pgmeta_oid, object name or ghobject in json")
    ("objcmd", po::value<string>(&objcmd), "command [(get|set)-bytes, (get|set|rm)-(attr|omap), (get|set)-omaphdr, list-attrs, list-omap, remove]")
    ("arg1", po::value<string>(&arg1), "arg1 based on cmd")
    ("arg2", po::value<string>(&arg2), "arg2 based on cmd")
    ;

  po::options_description all;
  all.add(desc).add(positional);

  po::positional_options_description pd;
  pd.add("object", 1).add("objcmd", 1).add("arg1", 1).add("arg2", 1);

  vector<string> ceph_option_strings;

  po::variables_map vm;
  try {
    po::parsed_options parsed =
      po::command_line_parser(argc, argv).options(all).allow_unregistered().positional(pd).run();
    po::store( parsed, vm);
    po::notify(vm);
    ceph_option_strings = po::collect_unrecognized(parsed.options,
						   po::include_positional);
  } catch(po::error &e) {
    std::cerr << e.what() << std::endl;
    return 1;
  }

  if (vm.count("help")) {
    usage(desc);
    return 1;
  }

  // Compatibility with previous option name
  if (op == "dump-import")
    op = "dump-export";

  debug = (vm.count("debug") > 0);

  force = (vm.count("force") > 0);

  if (vm.count("namespace"))
    nspace = argnspace;

  dry_run = (vm.count("dry-run") > 0);

  osflagbits_t flags = 0;
  if (dry_run || vm.count("skip-journal-replay"))
    flags |= SKIP_JOURNAL_REPLAY;
  if (vm.count("skip-mount-omap"))
    flags |= SKIP_MOUNT_OMAP;
  if (op == "update-mon-db")
    flags |= SKIP_JOURNAL_REPLAY;

  head = (vm.count("head") > 0);

  // infer osd id so we can authenticate
  char fn[PATH_MAX];
  snprintf(fn, sizeof(fn), "%s/whoami", dpath.c_str());
  int fd = ::open(fn, O_RDONLY);
  if (fd >= 0) {
    bufferlist bl;
    bl.read_fd(fd, 64);
    string s(bl.c_str(), bl.length());
    int whoami = atoi(s.c_str());
    vector<string> tmp;
    // identify ourselves as this osd so we can auth and fetch our configs
    tmp.push_back("-n");
    tmp.push_back(string("osd.") + stringify(whoami));
    // populate osd_data so that the default keyring location works
    tmp.push_back("--osd-data");
    tmp.push_back(dpath);
    tmp.insert(tmp.end(), ceph_option_strings.begin(),
	       ceph_option_strings.end());
    tmp.swap(ceph_option_strings);
  }

  vector<const char *> ceph_options;
  ceph_options.reserve(ceph_options.size() + ceph_option_strings.size());
  for (vector<string>::iterator i = ceph_option_strings.begin();
       i != ceph_option_strings.end();
       ++i) {
    ceph_options.push_back(i->c_str());
  }

  snprintf(fn, sizeof(fn), "%s/type", dpath.c_str());
  fd = ::open(fn, O_RDONLY);
  if (fd >= 0) {
    bufferlist bl;
    bl.read_fd(fd, 64);
    if (bl.length()) {
      string dp_type = string(bl.c_str(), bl.length() - 1);  // drop \n
      if (vm.count("type") && dp_type != "" && type != dp_type)
        cerr << "WARNING: Ignoring type \"" << type << "\" - found data-path type \""
             << dp_type << "\"" << std::endl;
      type = dp_type;
      //cout << "object store type is " << type << std::endl;
    }
    ::close(fd);
  }

  if (!vm.count("type") && type == "") {
    type = "bluestore";
  }
  if (!vm.count("data-path") &&
     op != "dump-export" &&
     !(op == "dump-journal" && type == "filestore")) {
    cerr << "Must provide --data-path" << std::endl;
    usage(desc);
    return 1;
  }
  if (type == "filestore" && !vm.count("journal-path")) {
    jpath = dpath + "/journal";
  }
  if (!vm.count("op") && !vm.count("object")) {
    cerr << "Must provide --op or object command..." << std::endl;
    usage(desc);
    return 1;
  }
  if (op != "list" && op != "apply-layout-settings" &&
      vm.count("op") && vm.count("object")) {
    cerr << "Can't specify both --op and object command syntax" << std::endl;
    usage(desc);
    return 1;
  }
  if (op == "apply-layout-settings" && !(vm.count("pool") ^ vm.count("pgid"))) {
    cerr << "apply-layout-settings requires either --pool or --pgid"
	 << std::endl;
    usage(desc);
    return 1;
  }
  if (op != "list" && op != "apply-layout-settings" && vm.count("object") && !vm.count("objcmd")) {
    cerr << "Invalid syntax, missing command" << std::endl;
    usage(desc);
    return 1;
  }
  if (op == "fuse" && mountpoint.length() == 0) {
    cerr << "Missing fuse mountpoint" << std::endl;
    usage(desc);
    return 1;
  }
  outistty = isatty(STDOUT_FILENO);

  file_fd = fd_none;
  if ((op == "export" || op == "export-remove" || op == "get-osdmap" || op == "get-inc-osdmap") && !dry_run) {
    if (!vm.count("file") || file == "-") {
      if (outistty) {
        cerr << "stdout is a tty and no --file filename specified" << std::endl;
        return 1;
      }
      file_fd = STDOUT_FILENO;
    } else {
      file_fd = open(file.c_str(), O_WRONLY|O_CREAT|O_TRUNC, 0666);
    }
  } else if (op == "import" || op == "dump-export" || op == "set-osdmap" || op == "set-inc-osdmap") {
    if (!vm.count("file") || file == "-") {
      if (isatty(STDIN_FILENO)) {
        cerr << "stdin is a tty and no --file filename specified" << std::endl;
        return 1;
      }
      file_fd = STDIN_FILENO;
    } else {
      file_fd = open(file.c_str(), O_RDONLY);
    }
  }

  ObjectStoreTool tool = ObjectStoreTool(file_fd, dry_run);

  if (vm.count("file") && file_fd == fd_none && !dry_run) {
    cerr << "--file option only applies to import, dump-export, export, export-remove, "
	 << "get-osdmap, set-osdmap, get-inc-osdmap or set-inc-osdmap" << std::endl;
    return 1;
  }

  if (file_fd != fd_none && file_fd < 0) {
    string err = string("file: ") + file;
    perror(err.c_str());
    return 1;
  }

  auto cct = global_init(
    NULL, ceph_options,
    CEPH_ENTITY_TYPE_OSD,
    CODE_ENVIRONMENT_UTILITY_NODOUT,
    0);
  common_init_finish(g_ceph_context);
  if (debug) {
    g_conf().set_val_or_die("log_to_stderr", "true");
    g_conf().set_val_or_die("err_to_stderr", "true");
  }
  g_conf().apply_changes(nullptr);

  // Special list handling.  Treating pretty_format as human readable,
  // with one object per line and not an enclosing array.
  human_readable = ends_with(format, "-pretty");
  if ((op == "list" || op == "meta-list") && human_readable) {
    // Remove -pretty from end of format which we know is there
    format = format.substr(0, format.size() - strlen("-pretty"));
  }

  formatter = Formatter::create(format);
  if (formatter == NULL) {
    cerr << "unrecognized format: " << format << std::endl;
    return 1;
  }

  // Special handling for filestore journal, so we can dump it without mounting
  if (op == "dump-journal" && type == "filestore") {
    int ret = mydump_journal(formatter, jpath, g_conf()->journal_dio);
    if (ret < 0) {
      cerr << "journal-path: " << jpath << ": "
	   << cpp_strerror(ret) << std::endl;
      return 1;
    }
    formatter->flush(cout);
    return 0;
  }

  if (op == "dump-export") {
    int ret = tool.dump_export(formatter);
    if (ret < 0) {
      cerr << "dump-export: "
	   << cpp_strerror(ret) << std::endl;
      return 1;
    }
    return 0;
  }

  //Verify that data-path really exists
  struct stat st;
  if (::stat(dpath.c_str(), &st) == -1) {
    string err = string("data-path: ") + dpath;
    perror(err.c_str());
    return 1;
  }

  if (pgidstr.length() && !pgid.parse(pgidstr.c_str())) {
    cerr << "Invalid pgid '" << pgidstr << "' specified" << std::endl;
    return 1;
  }

  //Verify that the journal-path really exists
  if (type == "filestore") {
    if (::stat(jpath.c_str(), &st) == -1) {
      string err = string("journal-path: ") + jpath;
      perror(err.c_str());
      return 1;
    }
    if (S_ISDIR(st.st_mode)) {
      cerr << "journal-path: " << jpath << ": "
	   << cpp_strerror(EISDIR) << std::endl;
      return 1;
    }
  }

  ObjectStore *fs = ObjectStore::create(g_ceph_context, type, dpath, jpath, flags);
  if (fs == NULL) {
    cerr << "Unable to create store of type " << type << std::endl;
    return 1;
  }

  if (op == "fsck" || op == "fsck-deep") {
    int r = fs->fsck(op == "fsck-deep");
    if (r < 0) {
      cerr << "fsck failed: " << cpp_strerror(r) << std::endl;
      return 1;
    }
    if (r > 0) {
      cerr << "fsck found " << r << " errors" << std::endl;
      return 1;
    }
    cout << "fsck found no errors" << std::endl;
    return 0;
  }
  if (op == "repair" || op == "repair-deep") {
    int r = fs->repair(op == "repair-deep");
    if (r < 0) {
      cerr << "repair failed: " << cpp_strerror(r) << std::endl;
      return 1;
    }
    if (r > 0) {
      cerr << "repair found " << r << " errors" << std::endl;
      return 1;
    }
    cout << "repair found no errors" << std::endl;
    return 0;
  }
  if (op == "mkfs") {
    if (fsid.length()) {
      uuid_d f;
      bool r = f.parse(fsid.c_str());
      if (!r) {
	cerr << "failed to parse uuid '" << fsid << "'" << std::endl;
	return 1;
      }
      fs->set_fsid(f);
    }
    int r = fs->mkfs();
    if (r < 0) {
      cerr << "mkfs failed: " << cpp_strerror(r) << std::endl;
      return 1;
    }
    return 0;
  }
  if (op == "dup") {
    string target_type;
    char fn[PATH_MAX];
    snprintf(fn, sizeof(fn), "%s/type", target_data_path.c_str());
    int fd = ::open(fn, O_RDONLY);
    if (fd < 0) {
      cerr << "Unable to open " << target_data_path << "/type" << std::endl;
      exit(1);
    }
    bufferlist bl;
    bl.read_fd(fd, 64);
    if (bl.length()) {
      target_type = string(bl.c_str(), bl.length() - 1);  // drop \n
    }
    ::close(fd);
    ObjectStore *targetfs = ObjectStore::create(
      g_ceph_context, target_type,
      target_data_path, "", 0);
    if (targetfs == NULL) {
      cerr << "Unable to open store of type " << target_type << std::endl;
      return 1;
    }
    int r = dup(dpath, fs, target_data_path, targetfs);
    if (r < 0) {
      cerr << "dup failed: " << cpp_strerror(r) << std::endl;
      return 1;
    }
    return 0;
  }

  int ret = fs->mount();
  if (ret < 0) {
    if (ret == -EBUSY) {
      cerr << "OSD has the store locked" << std::endl;
    } else {
      cerr << "Mount failed with '" << cpp_strerror(ret) << "'" << std::endl;
    }
    return 1;
  }

  if (op == "fuse") {
#ifdef HAVE_LIBFUSE
    FuseStore fuse(fs, mountpoint);
    cout << "mounting fuse at " << mountpoint << " ..." << std::endl;
    int r = fuse.main();
    if (r < 0) {
      cerr << "failed to mount fuse: " << cpp_strerror(r) << std::endl;
      return 1;
    }
#else
    cerr << "fuse support not enabled" << std::endl;
#endif
    return 0;
  }

  vector<coll_t> ls;
  vector<coll_t>::iterator it;
  CompatSet supported;

#ifdef INTERNAL_TEST
  supported = get_test_compat_set();
#else
  supported = OSD::get_osd_compat_set();
#endif

  bufferlist bl;
  OSDSuperblock superblock;
  auto ch = fs->open_collection(coll_t::meta());
  bufferlist::const_iterator p;
  ret = fs->read(ch, OSD_SUPERBLOCK_GOBJECT, 0, 0, bl);
  if (ret < 0) {
    cerr << "Failure to read OSD superblock: " << cpp_strerror(ret) << std::endl;
    goto out;
  }

  p = bl.cbegin();
  decode(superblock, p);

  if (debug) {
    cerr << "Cluster fsid=" << superblock.cluster_fsid << std::endl;
  }

  if (debug) {
    cerr << "Supported features: " << supported << std::endl;
    cerr << "On-disk features: " << superblock.compat_features << std::endl;
  }
  if (supported.compare(superblock.compat_features) == -1) {
    CompatSet unsupported = supported.unsupported(superblock.compat_features);
    cerr << "On-disk OSD incompatible features set "
      << unsupported << std::endl;
    ret = -EINVAL;
    goto out;
  }

  if (op == "apply-layout-settings") {
    int target_level = 0;
    // Single positional argument with apply-layout-settings
    // for target_level.
    if (vm.count("object") && isdigit(object[0])) {
      target_level = atoi(object.c_str());
    // This requires --arg1 to be specified since
    // this is the third positional argument and normally
    // used with object operations.
    } else if (vm.count("arg1") && isdigit(arg1[0])) {
      target_level = atoi(arg1.c_str());
    }
    ret = apply_layout_settings(fs, superblock, pool, pgid, dry_run, target_level);
    goto out;
  }

  if (op != "list" && vm.count("object")) {
    // Special case: Create pgmeta_oid if empty string specified
    // This can't conflict with any actual object names.
    if (object == "") {
      ghobj = pgid.make_pgmeta_oid();
    } else {
    json_spirit::Value v;
    try {
      if (!json_spirit::read(object, v) ||
          (v.type() != json_spirit::array_type && v.type() != json_spirit::obj_type)) {
        // Special: Need head/snapdir so set even if user didn't specify
        if (vm.count("objcmd") && (objcmd == "remove-clone-metadata"))
	  head = true;
	lookup_ghobject lookup(object, nspace, head);
	if (pgidstr.length())
	  ret = action_on_all_objects_in_exact_pg(fs, coll_t(pgid), lookup, debug);
	else
	  ret = action_on_all_objects(fs, lookup, debug);
	if (ret) {
	  throw std::runtime_error("Internal error");
	} else {
	  if (lookup.size() != 1) {
	    stringstream ss;
	    if (lookup.size() == 0)
	      ss << "No object id '" << object << "' found or invalid JSON specified";
	    else
	      ss << "Found " << lookup.size() << " objects with id '" << object
		 << "', please use a JSON spec from --op list instead";
	    throw std::runtime_error(ss.str());
	  }
	  pair<coll_t, ghobject_t> found = lookup.pop();
	  pgidstr = found.first.to_str();
	  pgid.parse(pgidstr.c_str());
	  ghobj = found.second;
	}
      } else {
	stringstream ss;
	if (pgidstr.length() == 0 && v.type() != json_spirit::array_type) {
	  ss << "Without --pgid the object '" << object
	     << "' must be a JSON array";
	  throw std::runtime_error(ss.str());
	}
	if (v.type() == json_spirit::array_type) {
	  json_spirit::Array array = v.get_array();
	  if (array.size() != 2) {
	    ss << "Object '" << object
	       << "' must be a JSON array with 2 elements";
	    throw std::runtime_error(ss.str());
	  }
	  vector<json_spirit::Value>::iterator i = array.begin();
	  ceph_assert(i != array.end());
	  if (i->type() != json_spirit::str_type) {
	    ss << "Object '" << object
	       << "' must be a JSON array with the first element a string";
	    throw std::runtime_error(ss.str());
	  }
	  string object_pgidstr = i->get_str();
          if (object_pgidstr != "meta") {
	    spg_t object_pgid;
	    object_pgid.parse(object_pgidstr.c_str());
	    if (pgidstr.length() > 0) {
	      if (object_pgid != pgid) {
	        ss << "object '" << object
		   << "' has a pgid different from the --pgid="
		   << pgidstr << " option";
	        throw std::runtime_error(ss.str());
	      }
	    } else {
	      pgidstr = object_pgidstr;
	      pgid = object_pgid;
	    }
          } else {
            pgidstr = object_pgidstr;
          }
	  ++i;
	  v = *i;
	}
	try {
	  ghobj.decode(v);
	} catch (std::runtime_error& e) {
	  ss << "Decode object JSON error: " << e.what();
	  throw std::runtime_error(ss.str());
	}
        if (pgidstr != "meta" && (uint64_t)pgid.pgid.m_pool != (uint64_t)ghobj.hobj.pool) {
          cerr << "Object pool and pgid pool don't match" << std::endl;
          ret = 1;
          goto out;
        }
      }
    } catch (std::runtime_error& e) {
      cerr << e.what() << std::endl;
      ret = 1;
      goto out;
    }
    }
  }

  // The ops which require --pgid option are checked here and
  // mentioned in the usage for --pgid.
  if ((op == "info" || op == "log" || op == "remove" || op == "export"
      || op == "export-remove" || op == "mark-complete"
      || op == "reset-last-complete"
      || op == "trim-pg-log") &&
      pgidstr.length() == 0) {
    cerr << "Must provide pgid" << std::endl;
    usage(desc);
    ret = 1;
    goto out;
  }

  if (op == "import") {

    try {
      ret = tool.do_import(fs, superblock, force, pgidstr);
    }
    catch (const buffer::error &e) {
      cerr << "do_import threw exception error " << e.what() << std::endl;
      ret = -EFAULT;
    }
    if (ret == -EFAULT) {
      cerr << "Corrupt input for import" << std::endl;
    }
    if (ret == 0)
      cout << "Import successful" << std::endl;
    goto out;
  } else if (op == "dump-journal-mount") {
    // Undocumented feature to dump journal with mounted fs
    // This doesn't support the format option, but it uses the
    // ObjectStore::dump_journal() and mounts to get replay to run.
    ret = fs->dump_journal(cout);
    if (ret) {
      if (ret == -EOPNOTSUPP) {
        cerr << "Object store type \"" << type << "\" doesn't support journal dump" << std::endl;
      } else {
        cerr << "Journal dump failed with error " << cpp_strerror(ret) << std::endl;
      }
    }
    goto out;
  } else if (op == "get-osdmap") {
    bufferlist bl;
    OSDMap osdmap;
    if (epoch == 0) {
      epoch = superblock.current_epoch;
    }
    ret = get_osdmap(fs, epoch, osdmap, bl);
    if (ret) {
      cerr << "Failed to get osdmap#" << epoch << ": "
	   << cpp_strerror(ret) << std::endl;
      goto out;
    }
    ret = bl.write_fd(file_fd);
    if (ret) {
      cerr << "Failed to write to " << file << ": " << cpp_strerror(ret) << std::endl;
    } else {
      cout << "osdmap#" << epoch << " exported." << std::endl;
    }
    goto out;
  } else if (op == "set-osdmap") {
    bufferlist bl;
    ret = get_fd_data(file_fd, bl);
    if (ret < 0) {
      cerr << "Failed to read osdmap " << cpp_strerror(ret) << std::endl;
    } else {
      ret = set_osdmap(fs, epoch, bl, force);
    }
    goto out;
  } else if (op == "get-inc-osdmap") {
    bufferlist bl;
    if (epoch == 0) {
      epoch = superblock.current_epoch;
    }
    ret = get_inc_osdmap(fs, epoch, bl);
    if (ret < 0) {
      cerr << "Failed to get incremental osdmap# " << epoch << ": "
	   << cpp_strerror(ret) << std::endl;
      goto out;
    }
    ret = bl.write_fd(file_fd);
    if (ret) {
      cerr << "Failed to write to " << file << ": " << cpp_strerror(ret) << std::endl;
    } else {
      cout << "inc-osdmap#" << epoch << " exported." << std::endl;
    }
    goto out;
  } else if (op == "set-inc-osdmap") {
    bufferlist bl;
    ret = get_fd_data(file_fd, bl);
    if (ret < 0) {
      cerr << "Failed to read incremental osdmap  " << cpp_strerror(ret) << std::endl;
      goto out;
    } else {
      ret = set_inc_osdmap(fs, epoch, bl, force);
    }
    goto out;
  } else if (op == "update-mon-db") {
    if (!vm.count("mon-store-path")) {
      cerr << "Please specify the path to monitor db to update" << std::endl;
      ret = -EINVAL;
    } else {
      ret = update_mon_db(*fs, superblock, dpath + "/keyring", mon_store_path);
    }
    goto out;
  }

  if (op == "remove") {
    if (!force && !dry_run) {
      cerr << "Please use export-remove or you must use --force option" << std::endl;
      ret = -EINVAL;
      goto out;
    }
    ret = initiate_new_remove_pg(fs, pgid);
    if (ret < 0) {
      cerr << "PG '" << pgid << "' not found" << std::endl;
      goto out;
    }
    cout << "Remove successful" << std::endl;
    goto out;
  }

  if (op == "fix-lost") {
    boost::scoped_ptr<action_on_object_t> action;
    action.reset(new do_fix_lost());
    if (pgidstr.length())
      ret = action_on_all_objects_in_exact_pg(fs, coll_t(pgid), *action, debug);
    else
      ret = action_on_all_objects(fs, *action, debug);
    goto out;
  }

  if (op == "list") {
    ret = do_list(fs, pgidstr, object, nspace, formatter, debug,
                  human_readable, head);
    if (ret < 0) {
      cerr << "do_list failed: " << cpp_strerror(ret) << std::endl;
    }
    goto out;
  }

  if (op == "dump-super") {
    formatter->open_object_section("superblock");
    superblock.dump(formatter);
    formatter->close_section();
    formatter->flush(cout);
    cout << std::endl;
    goto out;
  }

  if (op == "meta-list") {
    ret = do_meta(fs, object, formatter, debug, human_readable);
    if (ret < 0) {
      cerr << "do_meta failed: " << cpp_strerror(ret) << std::endl;
    }
    goto out;
  }

  ret = fs->list_collections(ls);
  if (ret < 0) {
    cerr << "failed to list pgs: " << cpp_strerror(ret) << std::endl;
    goto out;
  }

  if (debug && op == "list-pgs")
    cout << "Performing list-pgs operation" << std::endl;

  // Find pg
  for (it = ls.begin(); it != ls.end(); ++it) {
    spg_t tmppgid;

    if (pgidstr == "meta") {
      if (it->to_str() == "meta")
        break;
      else
        continue;
    }

    if (!it->is_pg(&tmppgid)) {
      continue;
    }

    if (it->is_temp(&tmppgid)) {
      continue;
    }

    if (op != "list-pgs" && tmppgid != pgid) {
      continue;
    }

    if (op != "list-pgs") {
      //Found!
      break;
    }

    cout << tmppgid << std::endl;
  }

  if (op == "list-pgs") {
    ret = 0;
    goto out;
  }

  // If not an object command nor any of the ops handled below, then output this usage
  // before complaining about a bad pgid
  if (!vm.count("objcmd") && op != "export" && op != "export-remove" && op != "info" && op != "log" && op != "mark-complete" && op != "trim-pg-log") {
    cerr << "Must provide --op (info, log, remove, mkfs, fsck, repair, export, export-remove, import, list, fix-lost, list-pgs, dump-journal, dump-super, meta-list, "
      "get-osdmap, set-osdmap, get-inc-osdmap, set-inc-osdmap, mark-complete, reset-last-complete, dump-export, trim-pg-log)"
	 << std::endl;
    usage(desc);
    ret = 1;
    goto out;
  }
  epoch_t map_epoch;
// The following code for export, info, log require omap or !skip-mount-omap
  if (it != ls.end()) {

    coll_t coll = *it;

    if (vm.count("objcmd")) {
      ret = 0;
      if (objcmd == "remove" || objcmd == "removeall") {
        bool all = (objcmd == "removeall");
        enum rmtype type = BOTH;
        if (rmtypestr == "nosnapmap")
          type = NOSNAPMAP;
        else if (rmtypestr == "snapmap")
          type = SNAPMAP;
        ret = do_remove_object(fs, coll, ghobj, all, force, type);
        goto out;
      } else if (objcmd == "list-attrs") {
        ret = do_list_attrs(fs, coll, ghobj);
        goto out;
      } else if (objcmd == "list-omap") {
        ret = do_list_omap(fs, coll, ghobj);
        goto out;
      } else if (objcmd == "get-bytes" || objcmd == "set-bytes") {
        if (objcmd == "get-bytes") {
          int fd;
          if (vm.count("arg1") == 0 || arg1 == "-") {
            fd = STDOUT_FILENO;
	  } else {
            fd = open(arg1.c_str(), O_WRONLY|O_TRUNC|O_CREAT|O_EXCL|O_LARGEFILE, 0666);
            if (fd == -1) {
              cerr << "open " << arg1 << " " << cpp_strerror(errno) << std::endl;
              ret = 1;
              goto out;
            }
          }
          ret = do_get_bytes(fs, coll, ghobj, fd);
          if (fd != STDOUT_FILENO)
            close(fd);
        } else {
          int fd;
          if (vm.count("arg1") == 0 || arg1 == "-") {
            // Since read_fd() doesn't handle ^D from a tty stdin, don't allow it.
            if (isatty(STDIN_FILENO)) {
                cerr << "stdin is a tty and no file specified" << std::endl;
                ret = 1;
                goto out;
            }
            fd = STDIN_FILENO;
	  } else {
            fd = open(arg1.c_str(), O_RDONLY|O_LARGEFILE, 0666);
            if (fd == -1) {
              cerr << "open " << arg1 << " " << cpp_strerror(errno) << std::endl;
              ret = 1;
              goto out;
            }
          }
          ret = do_set_bytes(fs, coll, ghobj, fd);
          if (fd != STDIN_FILENO)
            close(fd);
        }
        goto out;
      } else if (objcmd == "get-attr") {
	if (vm.count("arg1") == 0) {
	  usage(desc);
          ret = 1;
          goto out;
        }
	ret = do_get_attr(fs, coll, ghobj, arg1);
        goto out;
      } else if (objcmd == "set-attr") {
	if (vm.count("arg1") == 0) {
	  usage(desc);
          ret = 1;
        }

	int fd;
	if (vm.count("arg2") == 0 || arg2 == "-") {
          // Since read_fd() doesn't handle ^D from a tty stdin, don't allow it.
          if (isatty(STDIN_FILENO)) {
            cerr << "stdin is a tty and no file specified" << std::endl;
            ret = 1;
            goto out;
          }
	  fd = STDIN_FILENO;
	} else {
	  fd = open(arg2.c_str(), O_RDONLY|O_LARGEFILE, 0666);
	  if (fd == -1) {
	    cerr << "open " << arg2 << " " << cpp_strerror(errno) << std::endl;
	    ret = 1;
	    goto out;
	  }
	}
	ret = do_set_attr(fs, coll, ghobj, arg1, fd);
	if (fd != STDIN_FILENO)
	  close(fd);
        goto out;
      } else if (objcmd == "rm-attr") {
	if (vm.count("arg1") == 0) {
	  usage(desc);
          ret = 1;
          goto out;
        }
	ret = do_rm_attr(fs, coll, ghobj, arg1);
        goto out;
      } else if (objcmd == "get-omap") {
	if (vm.count("arg1") == 0) {
	  usage(desc);
          ret = 1;
          goto out;
        }
	ret = do_get_omap(fs, coll, ghobj, arg1);
        goto out;
      } else if (objcmd == "set-omap") {
	if (vm.count("arg1") == 0) {
	  usage(desc);
          ret = 1;
          goto out;
        }
	int fd;
	if (vm.count("arg2") == 0 || arg2 == "-") {
          // Since read_fd() doesn't handle ^D from a tty stdin, don't allow it.
          if (isatty(STDIN_FILENO)) {
            cerr << "stdin is a tty and no file specified" << std::endl;
            ret = 1;
            goto out;
          }
	  fd = STDIN_FILENO;
	} else {
	  fd = open(arg2.c_str(), O_RDONLY|O_LARGEFILE, 0666);
	  if (fd == -1) {
	    cerr << "open " << arg2 << " " << cpp_strerror(errno) << std::endl;
	    ret = 1;
	    goto out;
	  }
	}
	ret = do_set_omap(fs, coll, ghobj, arg1, fd);
	if (fd != STDIN_FILENO)
	  close(fd);
        goto out;
      } else if (objcmd == "rm-omap") {
	if (vm.count("arg1") == 0) {
	  usage(desc);
          ret = 1;
          goto out;
        }
	ret = do_rm_omap(fs, coll, ghobj, arg1);
        goto out;
      } else if (objcmd == "get-omaphdr") {
	if (vm.count("arg1")) {
	  usage(desc);
          ret = 1;
          goto out;
        }
	ret = do_get_omaphdr(fs, coll, ghobj);
        goto out;
      } else if (objcmd == "set-omaphdr") {
        // Extra arg
	if (vm.count("arg2")) {
	  usage(desc);
          ret = 1;
          goto out;
        }
	int fd;
	if (vm.count("arg1") == 0 || arg1 == "-") {
          // Since read_fd() doesn't handle ^D from a tty stdin, don't allow it.
          if (isatty(STDIN_FILENO)) {
            cerr << "stdin is a tty and no file specified" << std::endl;
            ret = 1;
            goto out;
          }
	  fd = STDIN_FILENO;
	} else {
	  fd = open(arg1.c_str(), O_RDONLY|O_LARGEFILE, 0666);
	  if (fd == -1) {
	    cerr << "open " << arg1 << " " << cpp_strerror(errno) << std::endl;
	    ret = 1;
	    goto out;
	  }
	}
	ret = do_set_omaphdr(fs, coll, ghobj, fd);
	if (fd != STDIN_FILENO)
	  close(fd);
        goto out;
      } else if (objcmd == "dump") {
	// There should not be any other arguments
	if (vm.count("arg1") || vm.count("arg2")) {
	  usage(desc);
	  ret = 1;
	  goto out;
	}
	ret = print_obj_info(fs, coll, ghobj, formatter);
	goto out;
      } else if (objcmd == "corrupt-info") {   // Undocumented testing feature
	// There should not be any other arguments
	if (vm.count("arg1") || vm.count("arg2")) {
	  usage(desc);
          ret = 1;
          goto out;
        }
        ret = corrupt_info(fs, coll, ghobj, formatter);
        goto out;
      } else if (objcmd == "set-size" || objcmd == "corrupt-size") {
	// Undocumented testing feature
	bool corrupt = (objcmd == "corrupt-size");
        // Extra arg
	if (vm.count("arg1") == 0 || vm.count("arg2")) {
	  usage(desc);
          ret = 1;
          goto out;
        }
        if (arg1.length() == 0 || !isdigit(arg1.c_str()[0])) {
	  cerr << "Invalid size '" << arg1 << "' specified" << std::endl;
	  ret = 1;
	  goto out;
	}
	uint64_t size = atoll(arg1.c_str());
	ret = set_size(fs, coll, ghobj, size, formatter, corrupt);
	goto out;
      } else if (objcmd == "clear-data-digest") {
        ret = clear_data_digest(fs, coll, ghobj);
        goto out;
      } else if (objcmd == "clear-snapset") {
        // UNDOCUMENTED: For testing zap SnapSet
        // IGNORE extra args since not in usage anyway
	if (!ghobj.hobj.has_snapset()) {
	  cerr << "'" << objcmd << "' requires a head or snapdir object" << std::endl;
	  ret = 1;
	  goto out;
	}
        ret = clear_snapset(fs, coll, ghobj, arg1);
        goto out;
      } else if (objcmd == "remove-clone-metadata") {
        // Extra arg
	if (vm.count("arg1") == 0 || vm.count("arg2")) {
	  usage(desc);
          ret = 1;
          goto out;
        }
	if (!ghobj.hobj.has_snapset()) {
	  cerr << "'" << objcmd << "' requires a head or snapdir object" << std::endl;
	  ret = 1;
	  goto out;
	}
        if (arg1.length() == 0 || !isdigit(arg1.c_str()[0])) {
	  cerr << "Invalid cloneid '" << arg1 << "' specified" << std::endl;
	  ret = 1;
	  goto out;
	}
        snapid_t cloneid = atoi(arg1.c_str());
	ret = remove_clone(fs, coll, ghobj, cloneid, force);
	goto out;
      }
      cerr << "Unknown object command '" << objcmd << "'" << std::endl;
      usage(desc);
      ret = 1;
      goto out;
    }

    map_epoch = 0;
    ret = PG::peek_map_epoch(fs, pgid, &map_epoch);
    if (ret < 0)
      cerr << "peek_map_epoch reports error" << std::endl;
    if (debug)
      cerr << "map_epoch " << map_epoch << std::endl;

    pg_info_t info(pgid);
    PastIntervals past_intervals;
    __u8 struct_ver;
    ret = PG::read_info(fs, pgid, coll, info, past_intervals, struct_ver);
    if (ret < 0) {
      cerr << "read_info error " << cpp_strerror(ret) << std::endl;
      goto out;
    }
    if (struct_ver < PG::get_compat_struct_v()) {
      cerr << "PG is too old to upgrade, use older Ceph version" << std::endl;
      ret = -EFAULT;
      goto out;
    }
    if (debug)
      cerr << "struct_v " << (int)struct_ver << std::endl;

    if (op == "export" || op == "export-remove") {
      ret = tool.do_export(fs, coll, pgid, info, map_epoch, struct_ver, superblock, past_intervals);
      if (ret == 0) {
        cerr << "Export successful" << std::endl;
        if (op == "export-remove") {
          ret = initiate_new_remove_pg(fs, pgid);
          // Export succeeded, so pgid is there
          ceph_assert(ret == 0);
          cerr << "Remove successful" << std::endl;
        }
      }
    } else if (op == "info") {
      formatter->open_object_section("info");
      info.dump(formatter);
      formatter->close_section();
      formatter->flush(cout);
      cout << std::endl;
    } else if (op == "log") {
      PGLog::IndexedLog log;
      pg_missing_t missing;
      ret = get_log(fs, struct_ver, pgid, info, log, missing);
      if (ret < 0)
          goto out;

      dump_log(formatter, cout, log, missing);
    } else if (op == "mark-complete") {
      ObjectStore::Transaction tran;
      ObjectStore::Transaction *t = &tran;

      if (struct_ver < PG::get_compat_struct_v()) {
        cerr << "Can't mark-complete, version mismatch " << (int)struct_ver
	     << " (pg)  < compat " << (int)PG::get_compat_struct_v() << " (tool)"
	     << std::endl;
	ret = 1;
	goto out;
      }

      cout << "Marking complete " << std::endl;

      info.last_update = eversion_t(superblock.current_epoch, info.last_update.version + 1);
      info.last_backfill = hobject_t::get_max();
      info.last_epoch_started = superblock.current_epoch;
      info.history.last_epoch_started = superblock.current_epoch;
      info.history.last_epoch_clean = superblock.current_epoch;
      past_intervals.clear();

      if (!dry_run) {
	ret = write_info(*t, map_epoch, info, past_intervals);
	if (ret != 0)
	  goto out;
	auto ch = fs->open_collection(coll_t(pgid));
	fs->queue_transaction(ch, std::move(*t));
      }
      cout << "Marking complete succeeded" << std::endl;
    } else if (op == "trim-pg-log") {
      ret = do_trim_pg_log(fs, coll, info, pgid,
			   map_epoch, past_intervals);
      if (ret < 0) {
	cerr << "Error trimming pg log: " << cpp_strerror(ret) << std::endl;
	goto out;
      }
      cout << "Finished trimming pg log" << std::endl;
      goto out;
    } else if (op == "reset-last-complete") {
      if (!force) {
        std::cerr << "WARNING: reset-last-complete is extremely dangerous and almost "
                  << "certain to lead to permanent data loss unless you know exactly "
                  << "what you are doing. Pass --force to proceed anyway."
                  << std::endl;
        ret = -EINVAL;
        goto out;
      }
      ObjectStore::Transaction tran;
      ObjectStore::Transaction *t = &tran;

      if (struct_ver < PG::get_compat_struct_v()) {
        cerr << "Can't reset-last-complete, version mismatch " << (int)struct_ver
	     << " (pg)  < compat " << (int)PG::get_compat_struct_v() << " (tool)"
	     << std::endl;
	ret = 1;
	goto out;
      }

      cout << "Reseting last_complete " << std::endl;

      info.last_complete = info.last_update;

      if (!dry_run) {
	ret = write_info(*t, map_epoch, info, past_intervals);
	if (ret != 0)
	  goto out;
	fs->queue_transaction(ch, std::move(*t));
      }
      cout << "Reseting last_complete succeeded" << std::endl;
   
    } else {
      ceph_assert(!"Should have already checked for valid --op");
    }
  } else {
    cerr << "PG '" << pgid << "' not found" << std::endl;
    ret = -ENOENT;
  }

out:
  int r = fs->umount();
  if (r < 0) {
    cerr << "umount failed: " << cpp_strerror(r) << std::endl;
    // If no previous error, then use umount() error
    if (ret == 0)
      ret = r;
  }

  if (dry_run) {
    // Export output can go to stdout, so put this message on stderr
    if (op == "export")
      cerr << "dry-run: Nothing changed" << std::endl;
    else
      cout << "dry-run: Nothing changed" << std::endl;
  }

  if (ret < 0)
    ret = 1;
  return ret;
}