+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * In-memory crash non-safe keyvalue db
- * Author: Ramesh Chander, Ramesh.Chander@sandisk.com
- */
-
-#include "include/compat.h"
-#include <filesystem>
-#include <set>
-#include <map>
-#include <string>
-#include <memory>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
-#include "common/perf_counters.h"
-#include "common/debug.h"
-#include "include/str_list.h"
-#include "include/str_map.h"
-#include "KeyValueDB.h"
-#include "MemDB.h"
-
-#include "include/ceph_assert.h"
-#include "common/debug.h"
-#include "common/errno.h"
-#include "include/buffer.h"
-#include "include/buffer_raw.h"
-#include "include/compat.h"
-
-#define dout_context g_ceph_context
-#define dout_subsys ceph_subsys_memdb
-#undef dout_prefix
-#define dout_prefix *_dout << "memdb: "
-#define dtrace dout(30)
-#define dwarn dout(0)
-#define dinfo dout(0)
-
-namespace fs = std::filesystem;
-
-using std::cerr;
-using std::ostream;
-using std::string;
-using std::vector;
-
-using ceph::bufferlist;
-using ceph::bufferptr;
-using ceph::decode;
-using ceph::encode;
-
-static void split_key(const string& raw_key, string *prefix, string *key)
-{
- size_t pos = raw_key.find(KEY_DELIM, 0);
- ceph_assert(pos != std::string::npos);
- *prefix = raw_key.substr(0, pos);
- *key = raw_key.substr(pos + 1, raw_key.length());
-}
-
-static string make_key(const string &prefix, const string &value)
-{
- string out = prefix;
- out.push_back(KEY_DELIM);
- out.append(value);
- return out;
-}
-
-void MemDB::_encode(mdb_iter_t iter, bufferlist &bl)
-{
- encode(iter->first, bl);
- encode(iter->second, bl);
-}
-
-std::string MemDB::_get_data_fn()
-{
- string fn = m_db_path + "/" + "MemDB.db";
- return fn;
-}
-
-void MemDB::_save()
-{
- std::lock_guard<std::mutex> l(m_lock);
- dout(10) << __func__ << " Saving MemDB to file: "<< _get_data_fn().c_str() << dendl;
- int mode = 0644;
- int fd = TEMP_FAILURE_RETRY(::open(_get_data_fn().c_str(),
- O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, mode));
- if (fd < 0) {
- int err = errno;
- cerr << "write_file(" << _get_data_fn().c_str() << "): failed to open file: "
- << cpp_strerror(err) << std::endl;
- return;
- }
- bufferlist bl;
- mdb_iter_t iter = m_map.begin();
- while (iter != m_map.end()) {
- dout(10) << __func__ << " Key:"<< iter->first << dendl;
- _encode(iter, bl);
- ++iter;
- }
- bl.write_fd(fd);
-
- VOID_TEMP_FAILURE_RETRY(::close(fd));
-}
-
-int MemDB::_load()
-{
- std::lock_guard<std::mutex> l(m_lock);
- dout(10) << __func__ << " Reading MemDB from file: "<< _get_data_fn().c_str() << dendl;
- /*
- * Open file and read it in single shot.
- */
- int fd = TEMP_FAILURE_RETRY(::open(_get_data_fn().c_str(), O_RDONLY|O_CLOEXEC));
- if (fd < 0) {
- int err = errno;
- cerr << "can't open " << _get_data_fn().c_str() << ": "
- << cpp_strerror(err) << std::endl;
- return -err;
- }
-
- struct stat st;
- memset(&st, 0, sizeof(st));
- if (::fstat(fd, &st) < 0) {
- int err = errno;
- cerr << "can't stat file " << _get_data_fn().c_str() << ": "
- << cpp_strerror(err) << std::endl;
- VOID_TEMP_FAILURE_RETRY(::close(fd));
- return -err;
- }
-
- ssize_t file_size = st.st_size;
- ssize_t bytes_done = 0;
- while (bytes_done < file_size) {
- string key;
- bufferptr datap;
-
- bytes_done += ceph::decode_file(fd, key);
- bytes_done += ceph::decode_file(fd, datap);
-
- dout(10) << __func__ << " Key:"<< key << dendl;
- m_map[key] = datap;
- m_total_bytes += datap.length();
- }
- VOID_TEMP_FAILURE_RETRY(::close(fd));
- return 0;
-}
-
-int MemDB::_init(bool create)
-{
- int r = 0;
- dout(1) << __func__ << dendl;
- if (create) {
- if (fs::exists(m_db_path)) {
- r = 0; // ignore EEXIST
- } else {
- std::error_code ec;
- if (!fs::create_directory(m_db_path, ec)) {
- derr << __func__ << " mkdir failed: " << ec.message() << dendl;
- return -ec.value();
- }
- fs::permissions(m_db_path, fs::perms::owner_all);
- }
- } else {
- r = _load();
- }
-
- PerfCountersBuilder plb(g_ceph_context, "memdb", l_memdb_first, l_memdb_last);
- plb.add_u64_counter(l_memdb_gets, "get", "Gets");
- plb.add_u64_counter(l_memdb_txns, "submit_transaction", "Submit transactions");
- plb.add_time_avg(l_memdb_get_latency, "get_latency", "Get latency");
- plb.add_time_avg(l_memdb_submit_latency, "submit_latency", "Submit Latency");
- logger = plb.create_perf_counters();
- m_cct->get_perfcounters_collection()->add(logger);
-
- return r;
-}
-
-int MemDB::set_merge_operator(
- const string& prefix,
- std::shared_ptr<KeyValueDB::MergeOperator> mop)
-{
- merge_ops.push_back(std::make_pair(prefix, mop));
- return 0;
-}
-
-int MemDB::do_open(ostream &out, bool create)
-{
- m_total_bytes = 0;
- m_allocated_bytes = 1;
-
- return _init(create);
-}
-
-int MemDB::open(ostream &out, const std::string& cfs) {
- if (!cfs.empty()) {
- ceph_abort_msg("Not implemented");
- }
- return do_open(out, false);
-}
-
-int MemDB::create_and_open(ostream &out, const std::string& cfs) {
- if (!cfs.empty()) {
- ceph_abort_msg("Not implemented");
- }
- return do_open(out, true);
-}
-
-MemDB::~MemDB()
-{
- close();
- dout(10) << __func__ << " Destroying MemDB instance: "<< dendl;
-}
-
-void MemDB::close()
-{
- /*
- * Save whatever in memory btree.
- */
- _save();
- if (logger)
- m_cct->get_perfcounters_collection()->remove(logger);
-}
-
-int MemDB::submit_transaction(KeyValueDB::Transaction t)
-{
- utime_t start = ceph_clock_now();
-
- MDBTransactionImpl* mt = static_cast<MDBTransactionImpl*>(t.get());
-
- dtrace << __func__ << " " << mt->get_ops().size() << dendl;
- for(auto& op : mt->get_ops()) {
- if(op.first == MDBTransactionImpl::WRITE) {
- ms_op_t set_op = op.second;
- _setkey(set_op);
- } else if (op.first == MDBTransactionImpl::MERGE) {
- ms_op_t merge_op = op.second;
- _merge(merge_op);
- } else {
- ms_op_t rm_op = op.second;
- ceph_assert(op.first == MDBTransactionImpl::DELETE);
- _rmkey(rm_op);
- }
- }
-
- utime_t lat = ceph_clock_now() - start;
- logger->inc(l_memdb_txns);
- logger->tinc(l_memdb_submit_latency, lat);
-
- return 0;
-}
-
-int MemDB::submit_transaction_sync(KeyValueDB::Transaction tsync)
-{
- dtrace << __func__ << " " << dendl;
- submit_transaction(tsync);
- return 0;
-}
-
-int MemDB::transaction_rollback(KeyValueDB::Transaction t)
-{
- MDBTransactionImpl* mt = static_cast<MDBTransactionImpl*>(t.get());
- mt->clear();
- return 0;
-}
-
-void MemDB::MDBTransactionImpl::set(
- const string &prefix, const string &k, const bufferlist &to_set_bl)
-{
- dtrace << __func__ << " " << prefix << " " << k << dendl;
- ops.push_back(make_pair(WRITE, std::make_pair(std::make_pair(prefix, k),
- to_set_bl)));
-}
-
-void MemDB::MDBTransactionImpl::rmkey(const string &prefix,
- const string &k)
-{
- dtrace << __func__ << " " << prefix << " " << k << dendl;
- ops.push_back(make_pair(DELETE,
- std::make_pair(std::make_pair(prefix, k),
- bufferlist())));
-}
-
-void MemDB::MDBTransactionImpl::rmkeys_by_prefix(const string &prefix)
-{
- KeyValueDB::Iterator it = m_db->get_iterator(prefix);
- for (it->seek_to_first(); it->valid(); it->next()) {
- rmkey(prefix, it->key());
- }
-}
-
-void MemDB::MDBTransactionImpl::rm_range_keys(const string &prefix, const string &start, const string &end)
-{
- KeyValueDB::Iterator it = m_db->get_iterator(prefix);
- it->lower_bound(start);
- while (it->valid()) {
- if (it->key() >= end) {
- break;
- }
- rmkey(prefix, it->key());
- it->next();
- }
-}
-
-void MemDB::MDBTransactionImpl::merge(
- const std::string &prefix, const std::string &key, const bufferlist &value)
-{
-
- dtrace << __func__ << " " << prefix << " " << key << dendl;
- ops.push_back(make_pair(MERGE, make_pair(std::make_pair(prefix, key), value)));
- return;
-}
-
-int MemDB::_setkey(ms_op_t &op)
-{
- std::lock_guard<std::mutex> l(m_lock);
- std::string key = make_key(op.first.first, op.first.second);
- bufferlist bl = op.second;
-
- m_total_bytes += bl.length();
-
- bufferlist bl_old;
- if (_get(op.first.first, op.first.second, &bl_old)) {
- /*
- * delete and free existing key.
- */
- ceph_assert(m_total_bytes >= bl_old.length());
- m_total_bytes -= bl_old.length();
- m_map.erase(key);
- }
-
- m_map[key] = bufferptr((char *) bl.c_str(), bl.length());
- iterator_seq_no++;
- return 0;
-}
-
-int MemDB::_rmkey(ms_op_t &op)
-{
- std::lock_guard<std::mutex> l(m_lock);
- std::string key = make_key(op.first.first, op.first.second);
-
- bufferlist bl_old;
- if (_get(op.first.first, op.first.second, &bl_old)) {
- ceph_assert(m_total_bytes >= bl_old.length());
- m_total_bytes -= bl_old.length();
- }
- iterator_seq_no++;
- /*
- * Erase will call the destructor for bufferptr.
- */
- return m_map.erase(key);
-}
-
-std::shared_ptr<KeyValueDB::MergeOperator> MemDB::_find_merge_op(const std::string &prefix)
-{
- for (const auto& i : merge_ops) {
- if (i.first == prefix) {
- return i.second;
- }
- }
-
- dtrace << __func__ << " No merge op for " << prefix << dendl;
- return NULL;
-}
-
-
-int MemDB::_merge(ms_op_t &op)
-{
- std::lock_guard<std::mutex> l(m_lock);
- std::string prefix = op.first.first;
- std::string key = make_key(op.first.first, op.first.second);
- bufferlist bl = op.second;
- int64_t bytes_adjusted = bl.length();
-
- /*
- * find the operator for this prefix
- */
- std::shared_ptr<MergeOperator> mop = _find_merge_op(prefix);
- ceph_assert(mop);
-
- /*
- * call the merge operator with value and non value
- */
- bufferlist bl_old;
- if (_get(op.first.first, op.first.second, &bl_old) == false) {
- std::string new_val;
- /*
- * Merge non existent.
- */
- mop->merge_nonexistent(bl.c_str(), bl.length(), &new_val);
- m_map[key] = bufferptr(new_val.c_str(), new_val.length());
- } else {
- /*
- * Merge existing.
- */
- std::string new_val;
- mop->merge(bl_old.c_str(), bl_old.length(), bl.c_str(), bl.length(), &new_val);
- m_map[key] = bufferptr(new_val.c_str(), new_val.length());
- bytes_adjusted -= bl_old.length();
- bl_old.clear();
- }
-
- ceph_assert((int64_t)m_total_bytes + bytes_adjusted >= 0);
- m_total_bytes += bytes_adjusted;
- iterator_seq_no++;
- return 0;
-}
-
-/*
- * Caller take btree lock.
- */
-bool MemDB::_get(const string &prefix, const string &k, bufferlist *out)
-{
- string key = make_key(prefix, k);
-
- mdb_iter_t iter = m_map.find(key);
- if (iter == m_map.end()) {
- return false;
- }
-
- out->push_back((m_map[key].clone()));
- return true;
-}
-
-bool MemDB::_get_locked(const string &prefix, const string &k, bufferlist *out)
-{
- std::lock_guard<std::mutex> l(m_lock);
- return _get(prefix, k, out);
-}
-
-
-int MemDB::get(const string &prefix, const std::string& key,
- bufferlist *out)
-{
- utime_t start = ceph_clock_now();
- int ret;
-
- if (_get_locked(prefix, key, out)) {
- ret = 0;
- } else {
- ret = -ENOENT;
- }
-
- utime_t lat = ceph_clock_now() - start;
- logger->inc(l_memdb_gets);
- logger->tinc(l_memdb_get_latency, lat);
-
- return ret;
-}
-
-int MemDB::get(const string &prefix, const std::set<string> &keys,
- std::map<string, bufferlist> *out)
-{
- utime_t start = ceph_clock_now();
-
- for (const auto& i : keys) {
- bufferlist bl;
- if (_get_locked(prefix, i, &bl))
- out->insert(make_pair(i, bl));
- }
-
- utime_t lat = ceph_clock_now() - start;
- logger->inc(l_memdb_gets);
- logger->tinc(l_memdb_get_latency, lat);
-
- return 0;
-}
-
-void MemDB::MDBWholeSpaceIteratorImpl::fill_current()
-{
- bufferlist bl;
- bl.push_back(m_iter->second.clone());
- m_key_value = std::make_pair(m_iter->first, bl);
-}
-
-bool MemDB::MDBWholeSpaceIteratorImpl::valid()
-{
- if (m_key_value.first.empty()) {
- return false;
- }
- return true;
-}
-
-bool MemDB::MDBWholeSpaceIteratorImpl::iterator_validate() {
-
- if (this_seq_no != *global_seq_no) {
- auto key = m_key_value.first;
- ceph_assert(!key.empty());
-
- bool restart_iter = false;
- if (!m_using_btree) {
- /*
- * Map is modified and marker key does not exists,
- * restart the iterator from next key.
- */
- if (m_map_p->find(key) == m_map_p->end()) {
- restart_iter = true;
- }
- } else {
- restart_iter = true;
- }
-
- if (restart_iter) {
- m_iter = m_map_p->lower_bound(key);
- if (m_iter == m_map_p->end()) {
- return false;
- }
- }
-
- /*
- * This iter is valid now.
- */
- this_seq_no = *global_seq_no;
- }
-
- return true;
-}
-
-void
-MemDB::MDBWholeSpaceIteratorImpl::free_last()
-{
- m_key_value.first.clear();
- m_key_value.second.clear();
-}
-
-string MemDB::MDBWholeSpaceIteratorImpl::key()
-{
- dtrace << __func__ << " " << m_key_value.first << dendl;
- string prefix, key;
- split_key(m_key_value.first, &prefix, &key);
- return key;
-}
-
-std::pair<string,string> MemDB::MDBWholeSpaceIteratorImpl::raw_key()
-{
- string prefix, key;
- split_key(m_key_value.first, &prefix, &key);
- return { prefix, key };
-}
-
-bool MemDB::MDBWholeSpaceIteratorImpl::raw_key_is_prefixed(
- const string &prefix)
-{
- string p, k;
- split_key(m_key_value.first, &p, &k);
- return (p == prefix);
-}
-
-bufferlist MemDB::MDBWholeSpaceIteratorImpl::value()
-{
- dtrace << __func__ << " " << m_key_value << dendl;
- return m_key_value.second;
-}
-
-int MemDB::MDBWholeSpaceIteratorImpl::next()
-{
- std::lock_guard<std::mutex> l(*m_map_lock_p);
- if (!iterator_validate()) {
- free_last();
- return -1;
- }
- free_last();
- ++m_iter;
- if (m_iter != m_map_p->end()) {
- fill_current();
- return 0;
- } else {
- return -1;
- }
-}
-
-int MemDB::MDBWholeSpaceIteratorImpl:: prev()
-{
- std::lock_guard<std::mutex> l(*m_map_lock_p);
- if (!iterator_validate()) {
- free_last();
- return -1;
- }
- free_last();
- if (m_iter != m_map_p->begin()) {
- --m_iter;
- fill_current();
- return 0;
- } else {
- return -1;
- }
-}
-
-/*
- * First key >= to given key, if key is null then first key in btree.
- */
-int MemDB::MDBWholeSpaceIteratorImpl::seek_to_first(const std::string &k)
-{
- std::lock_guard<std::mutex> l(*m_map_lock_p);
- free_last();
- if (k.empty()) {
- m_iter = m_map_p->begin();
- } else {
- m_iter = m_map_p->lower_bound(k);
- }
-
- if (m_iter == m_map_p->end()) {
- return -1;
- }
- fill_current();
- return 0;
-}
-
-int MemDB::MDBWholeSpaceIteratorImpl::seek_to_last(const std::string &k)
-{
- std::lock_guard<std::mutex> l(*m_map_lock_p);
- free_last();
- if (k.empty()) {
- m_iter = m_map_p->end();
- --m_iter;
- } else {
- m_iter = m_map_p->lower_bound(k);
- }
-
- if (m_iter == m_map_p->end()) {
- return -1;
- }
- fill_current();
- return 0;
-}
-
-MemDB::MDBWholeSpaceIteratorImpl::~MDBWholeSpaceIteratorImpl()
-{
- free_last();
-}
-
-int MemDB::MDBWholeSpaceIteratorImpl::upper_bound(const std::string &prefix,
- const std::string &after) {
-
- std::lock_guard<std::mutex> l(*m_map_lock_p);
-
- dtrace << "upper_bound " << prefix.c_str() << after.c_str() << dendl;
- string k = make_key(prefix, after);
- m_iter = m_map_p->upper_bound(k);
- if (m_iter != m_map_p->end()) {
- fill_current();
- return 0;
- }
- return -1;
-}
-
-int MemDB::MDBWholeSpaceIteratorImpl::lower_bound(const std::string &prefix,
- const std::string &to) {
- std::lock_guard<std::mutex> l(*m_map_lock_p);
- dtrace << "lower_bound " << prefix.c_str() << to.c_str() << dendl;
- string k = make_key(prefix, to);
- m_iter = m_map_p->lower_bound(k);
- if (m_iter != m_map_p->end()) {
- fill_current();
- return 0;
- }
- return -1;
-}
+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * In-memory crash non-safe keyvalue db
- * Author: Ramesh Chander, Ramesh.Chander@sandisk.com
- */
-
-#ifndef CEPH_OS_BLUESTORE_MEMDB_H
-#define CEPH_OS_BLUESTORE_MEMDB_H
-
-#include "include/buffer.h"
-#include <ostream>
-#include <set>
-#include <map>
-#include <string>
-#include <memory>
-#include <boost/scoped_ptr.hpp>
-#include "include/common_fwd.h"
-#include "include/encoding.h"
-#include "include/btree_map.h"
-#include "KeyValueDB.h"
-#include "osd/osd_types.h"
-
-#define KEY_DELIM '\0'
-
-
-enum {
- l_memdb_first = 34440,
- l_memdb_gets,
- l_memdb_txns,
- l_memdb_get_latency,
- l_memdb_submit_latency,
- l_memdb_last,
-};
-
-class MemDB : public KeyValueDB
-{
- typedef std::pair<std::pair<std::string, std::string>, ceph::bufferlist> ms_op_t;
- std::mutex m_lock;
- uint64_t m_total_bytes;
- uint64_t m_allocated_bytes;
-
- typedef std::map<std::string, ceph::bufferptr> mdb_map_t;
- typedef mdb_map_t::iterator mdb_iter_t;
- bool m_using_btree;
-
- mdb_map_t m_map;
-
- CephContext *m_cct;
- PerfCounters *logger;
- void* m_priv;
- std::string m_options;
- std::string m_db_path;
-
- int transaction_rollback(KeyValueDB::Transaction t);
- int _open(std::ostream &out);
- void close() override;
- bool _get(const std::string &prefix, const std::string &k, ceph::bufferlist *out);
- bool _get_locked(const std::string &prefix, const std::string &k, ceph::bufferlist *out);
- std::string _get_data_fn();
- void _encode(mdb_iter_t iter, ceph::bufferlist &bl);
- void _save();
- int _load();
- uint64_t iterator_seq_no;
-
-public:
- MemDB(CephContext *c, const std::string &path, void *p) :
- m_total_bytes(0), m_allocated_bytes(0), m_using_btree(false),
- m_cct(c), logger(NULL), m_priv(p), m_db_path(path), iterator_seq_no(1)
- {
- //Nothing as of now
- }
-
- ~MemDB() override;
- int set_merge_operator(const std::string& prefix,
- std::shared_ptr<MergeOperator> mop) override;
-
- std::shared_ptr<MergeOperator> _find_merge_op(const std::string &prefix);
-
- static
- int _test_init(const std::string& dir) { return 0; };
-
- class MDBTransactionImpl : public KeyValueDB::TransactionImpl {
- public:
- enum op_type { WRITE = 1, MERGE = 2, DELETE = 3};
- private:
-
- std::vector<std::pair<op_type, ms_op_t>> ops;
- MemDB *m_db;
-
- bool key_is_prefixed(const std::string &prefix, const std::string& full_key);
- public:
- const std::vector<std::pair<op_type, ms_op_t>>&
- get_ops() { return ops; };
-
- void set(const std::string &prefix, const std::string &key,
- const ceph::bufferlist &val) override;
- using KeyValueDB::TransactionImpl::set;
- void rmkey(const std::string &prefix, const std::string &k) override;
- using KeyValueDB::TransactionImpl::rmkey;
- void rmkeys_by_prefix(const std::string &prefix) override;
- void rm_range_keys(
- const std::string &prefix,
- const std::string &start,
- const std::string &end) override;
-
- void merge(const std::string &prefix, const std::string &key,
- const ceph::bufferlist &value) override;
- void clear() {
- ops.clear();
- }
- explicit MDBTransactionImpl(MemDB* _db) :m_db(_db)
- {
- ops.clear();
- }
- ~MDBTransactionImpl() override {};
- };
-
-private:
-
- /*
- * Transaction states.
- */
- int _merge(const std::string &k, ceph::bufferptr &bl);
- int _merge(ms_op_t &op);
- int _setkey(ms_op_t &op);
- int _rmkey(ms_op_t &op);
-
-public:
-
- int init(std::string option_str="") override { m_options = option_str; return 0; }
- int _init(bool format);
-
- int do_open(std::ostream &out, bool create);
- int open(std::ostream &out, const std::string& cfs="") override;
- int create_and_open(std::ostream &out, const std::string& cfs="") override;
- using KeyValueDB::create_and_open;
-
- KeyValueDB::Transaction get_transaction() override {
- return std::shared_ptr<MDBTransactionImpl>(new MDBTransactionImpl(this));
- }
-
- int submit_transaction(Transaction) override;
- int submit_transaction_sync(Transaction) override;
-
- int get(const std::string &prefix, const std::set<std::string> &key,
- std::map<std::string, ceph::bufferlist> *out) override;
-
- int get(const std::string &prefix, const std::string &key,
- ceph::bufferlist *out) override;
-
- using KeyValueDB::get;
-
- class MDBWholeSpaceIteratorImpl : public KeyValueDB::WholeSpaceIteratorImpl {
-
- mdb_iter_t m_iter;
- std::pair<std::string, ceph::bufferlist> m_key_value;
- mdb_map_t *m_map_p;
- std::mutex *m_map_lock_p;
- uint64_t *global_seq_no;
- uint64_t this_seq_no;
- bool m_using_btree;
-
- public:
- MDBWholeSpaceIteratorImpl(mdb_map_t *btree_p, std::mutex *btree_lock_p,
- uint64_t *iterator_seq_no, bool using_btree) {
- m_map_p = btree_p;
- m_map_lock_p = btree_lock_p;
- std::lock_guard<std::mutex> l(*m_map_lock_p);
- global_seq_no = iterator_seq_no;
- this_seq_no = *iterator_seq_no;
- m_using_btree = using_btree;
- }
-
- void fill_current();
- void free_last();
-
-
- int seek_to_first(const std::string &k) override;
- int seek_to_last(const std::string &k) override;
-
- int seek_to_first() override { return seek_to_first(std::string()); };
- int seek_to_last() override { return seek_to_last(std::string()); };
-
- int upper_bound(const std::string &prefix, const std::string &after) override;
- int lower_bound(const std::string &prefix, const std::string &to) override;
- bool valid() override;
- bool iterator_validate();
-
- int next() override;
- int prev() override;
- int status() override { return 0; };
-
- std::string key() override;
- std::pair<std::string,std::string> raw_key() override;
- bool raw_key_is_prefixed(const std::string &prefix) override;
- ceph::bufferlist value() override;
- ~MDBWholeSpaceIteratorImpl() override;
- };
-
- uint64_t get_estimated_size(std::map<std::string,uint64_t> &extra) override {
- std::lock_guard<std::mutex> l(m_lock);
- return m_allocated_bytes;
- };
-
- int get_statfs(struct store_statfs_t *buf) override {
- std::lock_guard<std::mutex> l(m_lock);
- buf->reset();
- buf->total = m_total_bytes;
- buf->allocated = m_allocated_bytes;
- buf->data_stored = m_total_bytes;
- return 0;
- }
-
- WholeSpaceIterator get_wholespace_iterator(IteratorOpts opts = 0) override {
- return std::shared_ptr<KeyValueDB::WholeSpaceIteratorImpl>(
- new MDBWholeSpaceIteratorImpl(&m_map, &m_lock, &iterator_seq_no, m_using_btree));
- }
-};
-
-#endif
-
projects / ceph.git / commitdiff