+++ /dev/null
-// -*- 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) 2010 Greg Farnum <gregf@hq.newdream.net>
- *
- * 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 "common/errno.h"
-#include "osdc/Journaler.h"
-#include "mds/JournalPointer.h"
-
-#include "mds/mdstypes.h"
-#include "mds/MDCache.h"
-#include "mon/MonClient.h"
-#include "mds/events/EResetJournal.h"
-
-#include "Resetter.h"
-
-#define dout_context g_ceph_context
-#define dout_subsys ceph_subsys_mds
-
-int Resetter::reset(mds_role_t role)
-{
- Mutex mylock("Resetter::reset::lock");
- Cond cond;
- bool done;
- int r;
-
- auto fs = fsmap->get_filesystem(role.fscid);
- assert(fs != nullptr);
- int64_t const pool_id = fs->mds_map.get_metadata_pool();
-
- JournalPointer jp(role.rank, pool_id);
- int jp_load_result = jp.load(objecter);
- if (jp_load_result != 0) {
- std::cerr << "Error loading journal: " << cpp_strerror(jp_load_result) <<
- ", pass --force to forcibly reset this journal" << std::endl;
- return jp_load_result;
- }
-
- Journaler journaler("resetter", jp.front,
- pool_id,
- CEPH_FS_ONDISK_MAGIC,
- objecter, 0, 0, &finisher);
-
- lock.Lock();
- journaler.recover(new C_SafeCond(&mylock, &cond, &done, &r));
- lock.Unlock();
-
- mylock.Lock();
- while (!done)
- cond.Wait(mylock);
- mylock.Unlock();
-
- if (r != 0) {
- if (r == -ENOENT) {
- cerr << "journal does not exist on-disk. Did you set a bad rank?"
- << std::endl;
- std::cerr << "Error loading journal: " << cpp_strerror(r) <<
- ", pass --force to forcibly reset this journal" << std::endl;
- return r;
- } else {
- cerr << "got error " << r << "from Journaler, failing" << std::endl;
- return r;
- }
- }
-
- lock.Lock();
- uint64_t old_start = journaler.get_read_pos();
- uint64_t old_end = journaler.get_write_pos();
- uint64_t old_len = old_end - old_start;
- cout << "old journal was " << old_start << "~" << old_len << std::endl;
-
- uint64_t new_start = ROUND_UP_TO(old_end+1, journaler.get_layout_period());
- cout << "new journal start will be " << new_start
- << " (" << (new_start - old_end) << " bytes past old end)" << std::endl;
-
- journaler.set_read_pos(new_start);
- journaler.set_write_pos(new_start);
- journaler.set_expire_pos(new_start);
- journaler.set_trimmed_pos(new_start);
- journaler.set_writeable();
-
- cout << "writing journal head" << std::endl;
- journaler.write_head(new C_SafeCond(&mylock, &cond, &done, &r));
- lock.Unlock();
-
- mylock.Lock();
- while (!done)
- cond.Wait(mylock);
- mylock.Unlock();
-
- Mutex::Locker l(lock);
- if (r != 0) {
- return r;
- }
-
- r = _write_reset_event(&journaler);
- if (r != 0) {
- return r;
- }
-
- cout << "done" << std::endl;
-
- return 0;
-}
-
-int Resetter::reset_hard(mds_role_t role)
-{
- auto fs = fsmap->get_filesystem(role.fscid);
- assert(fs != nullptr);
- int64_t const pool_id = fs->mds_map.get_metadata_pool();
-
- JournalPointer jp(role.rank, pool_id);
- jp.front = role.rank + MDS_INO_LOG_OFFSET;
- jp.back = 0;
- int r = jp.save(objecter);
- if (r != 0) {
- derr << "Error writing journal pointer: " << cpp_strerror(r) << dendl;
- return r;
- }
-
- Journaler journaler("resetter", jp.front,
- pool_id,
- CEPH_FS_ONDISK_MAGIC,
- objecter, 0, 0, &finisher);
- journaler.set_writeable();
-
- file_layout_t default_log_layout = MDCache::gen_default_log_layout(
- fsmap->get_filesystem(role.fscid)->mds_map);
- journaler.create(&default_log_layout, g_conf->mds_journal_format);
-
- C_SaferCond cond;
- {
- Mutex::Locker l(lock);
- journaler.write_head(&cond);
- }
- r = cond.wait();
- if (r != 0) {
- derr << "Error writing journal header: " << cpp_strerror(r) << dendl;
- return r;
- }
-
- {
- Mutex::Locker l(lock);
- r = _write_reset_event(&journaler);
- }
- if (r != 0) {
- derr << "Error writing EResetJournal: " << cpp_strerror(r) << dendl;
- return r;
- }
-
- dout(4) << "Successfully wrote new journal pointer and header for rank "
- << role << dendl;
- return 0;
-}
-
-int Resetter::_write_reset_event(Journaler *journaler)
-{
- assert(journaler != NULL);
-
- LogEvent *le = new EResetJournal;
-
- bufferlist bl;
- le->encode_with_header(bl, CEPH_FEATURES_SUPPORTED_DEFAULT);
-
- cout << "writing EResetJournal entry" << std::endl;
- C_SaferCond cond;
- journaler->append_entry(bl);
- journaler->flush(&cond);
-
- return cond.wait();
-}
-
Code Review / stor4nfv.git / blobdiff