--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+
+#include "JournalingObjectStore.h"
+
+#include "common/errno.h"
+#include "common/debug.h"
+
+#define dout_context cct
+#define dout_subsys ceph_subsys_journal
+#undef dout_prefix
+#define dout_prefix *_dout << "journal "
+
+
+
+void JournalingObjectStore::journal_start()
+{
+ dout(10) << "journal_start" << dendl;
+ finisher.start();
+}
+
+void JournalingObjectStore::journal_stop()
+{
+ dout(10) << "journal_stop" << dendl;
+ finisher.wait_for_empty();
+ finisher.stop();
+}
+
+// A journal_replay() makes journal writeable, this closes that out.
+void JournalingObjectStore::journal_write_close()
+{
+ if (journal) {
+ journal->close();
+ delete journal;
+ journal = 0;
+ }
+ apply_manager.reset();
+}
+
+int JournalingObjectStore::journal_replay(uint64_t fs_op_seq)
+{
+ dout(10) << "journal_replay fs op_seq " << fs_op_seq << dendl;
+
+ if (cct->_conf->journal_replay_from) {
+ dout(0) << "journal_replay forcing replay from "
+ << cct->_conf->journal_replay_from
+ << " instead of " << fs_op_seq << dendl;
+ // the previous op is the last one committed
+ fs_op_seq = cct->_conf->journal_replay_from - 1;
+ }
+
+ uint64_t op_seq = fs_op_seq;
+ apply_manager.init_seq(fs_op_seq);
+
+ if (!journal) {
+ submit_manager.set_op_seq(op_seq);
+ return 0;
+ }
+
+ int err = journal->open(op_seq);
+ if (err < 0) {
+ dout(3) << "journal_replay open failed with "
+ << cpp_strerror(err) << dendl;
+ delete journal;
+ journal = 0;
+ return err;
+ }
+
+ replaying = true;
+
+ int count = 0;
+ while (1) {
+ bufferlist bl;
+ uint64_t seq = op_seq + 1;
+ if (!journal->read_entry(bl, seq)) {
+ dout(3) << "journal_replay: end of journal, done." << dendl;
+ break;
+ }
+
+ if (seq <= op_seq) {
+ dout(3) << "journal_replay: skipping old op seq " << seq << " <= " << op_seq << dendl;
+ continue;
+ }
+ assert(op_seq == seq-1);
+
+ dout(3) << "journal_replay: applying op seq " << seq << dendl;
+ bufferlist::iterator p = bl.begin();
+ vector<ObjectStore::Transaction> tls;
+ while (!p.end()) {
+ tls.emplace_back(Transaction(p));
+ }
+
+ apply_manager.op_apply_start(seq);
+ int r = do_transactions(tls, seq);
+ apply_manager.op_apply_finish(seq);
+
+ op_seq = seq;
+ count++;
+
+ dout(3) << "journal_replay: r = " << r << ", op_seq now " << op_seq << dendl;
+ }
+
+ if (count)
+ dout(3) << "journal_replay: total = " << count << dendl;
+
+ replaying = false;
+
+ submit_manager.set_op_seq(op_seq);
+
+ // done reading, make writeable.
+ err = journal->make_writeable();
+ if (err < 0)
+ return err;
+
+ if (!count)
+ journal->committed_thru(fs_op_seq);
+
+ return count;
+}
+
+
+// ------------------------------------
+
+uint64_t JournalingObjectStore::ApplyManager::op_apply_start(uint64_t op)
+{
+ Mutex::Locker l(apply_lock);
+ while (blocked) {
+ dout(10) << "op_apply_start blocked, waiting" << dendl;
+ blocked_cond.Wait(apply_lock);
+ }
+ dout(10) << "op_apply_start " << op << " open_ops " << open_ops << " -> "
+ << (open_ops+1) << dendl;
+ assert(!blocked);
+ assert(op > committed_seq);
+ open_ops++;
+ return op;
+}
+
+void JournalingObjectStore::ApplyManager::op_apply_finish(uint64_t op)
+{
+ Mutex::Locker l(apply_lock);
+ dout(10) << "op_apply_finish " << op << " open_ops " << open_ops << " -> "
+ << (open_ops-1) << ", max_applied_seq " << max_applied_seq << " -> "
+ << MAX(op, max_applied_seq) << dendl;
+ --open_ops;
+ assert(open_ops >= 0);
+
+ // signal a blocked commit_start
+ if (blocked) {
+ blocked_cond.Signal();
+ }
+
+ // there can be multiple applies in flight; track the max value we
+ // note. note that we can't _read_ this value and learn anything
+ // meaningful unless/until we've quiesced all in-flight applies.
+ if (op > max_applied_seq)
+ max_applied_seq = op;
+}
+
+uint64_t JournalingObjectStore::SubmitManager::op_submit_start()
+{
+ lock.Lock();
+ uint64_t op = ++op_seq;
+ dout(10) << "op_submit_start " << op << dendl;
+ return op;
+}
+
+void JournalingObjectStore::SubmitManager::op_submit_finish(uint64_t op)
+{
+ dout(10) << "op_submit_finish " << op << dendl;
+ if (op != op_submitted + 1) {
+ dout(0) << "op_submit_finish " << op << " expected " << (op_submitted + 1)
+ << ", OUT OF ORDER" << dendl;
+ assert(0 == "out of order op_submit_finish");
+ }
+ op_submitted = op;
+ lock.Unlock();
+}
+
+
+// ------------------------------------------
+
+void JournalingObjectStore::ApplyManager::add_waiter(uint64_t op, Context *c)
+{
+ Mutex::Locker l(com_lock);
+ assert(c);
+ commit_waiters[op].push_back(c);
+}
+
+bool JournalingObjectStore::ApplyManager::commit_start()
+{
+ bool ret = false;
+
+ {
+ Mutex::Locker l(apply_lock);
+ dout(10) << "commit_start max_applied_seq " << max_applied_seq
+ << ", open_ops " << open_ops << dendl;
+ blocked = true;
+ while (open_ops > 0) {
+ dout(10) << "commit_start waiting for " << open_ops
+ << " open ops to drain" << dendl;
+ blocked_cond.Wait(apply_lock);
+ }
+ assert(open_ops == 0);
+ dout(10) << "commit_start blocked, all open_ops have completed" << dendl;
+ {
+ Mutex::Locker l(com_lock);
+ if (max_applied_seq == committed_seq) {
+ dout(10) << "commit_start nothing to do" << dendl;
+ blocked = false;
+ assert(commit_waiters.empty());
+ goto out;
+ }
+
+ committing_seq = max_applied_seq;
+
+ dout(10) << "commit_start committing " << committing_seq
+ << ", still blocked" << dendl;
+ }
+ }
+ ret = true;
+
+ if (journal)
+ journal->commit_start(committing_seq); // tell the journal too
+ out:
+ return ret;
+}
+
+void JournalingObjectStore::ApplyManager::commit_started()
+{
+ Mutex::Locker l(apply_lock);
+ // allow new ops. (underlying fs should now be committing all prior ops)
+ dout(10) << "commit_started committing " << committing_seq << ", unblocking"
+ << dendl;
+ blocked = false;
+ blocked_cond.Signal();
+}
+
+void JournalingObjectStore::ApplyManager::commit_finish()
+{
+ Mutex::Locker l(com_lock);
+ dout(10) << "commit_finish thru " << committing_seq << dendl;
+
+ if (journal)
+ journal->committed_thru(committing_seq);
+
+ committed_seq = committing_seq;
+
+ map<version_t, vector<Context*> >::iterator p = commit_waiters.begin();
+ while (p != commit_waiters.end() &&
+ p->first <= committing_seq) {
+ finisher.queue(p->second);
+ commit_waiters.erase(p++);
+ }
+}
+
+void JournalingObjectStore::_op_journal_transactions(
+ bufferlist& tbl, uint32_t orig_len, uint64_t op,
+ Context *onjournal, TrackedOpRef osd_op)
+{
+ if (osd_op.get())
+ dout(10) << "op_journal_transactions " << op << " reqid_t "
+ << (static_cast<OpRequest *>(osd_op.get()))->get_reqid() << dendl;
+ else
+ dout(10) << "op_journal_transactions " << op << dendl;
+
+ if (journal && journal->is_writeable()) {
+ journal->submit_entry(op, tbl, orig_len, onjournal, osd_op);
+ } else if (onjournal) {
+ apply_manager.add_waiter(op, onjournal);
+ }
+}
Code Review / stor4nfv.git / blobdiff