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// -*- 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) 2004-2006 Sage Weil <sage@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 "CInode.h"
#include "MDCache.h"
#include "MDSRank.h"
#include "Locker.h"
#include "osdc/Filer.h"
#include "RecoveryQueue.h"
#define dout_context g_ceph_context
#define dout_subsys ceph_subsys_mds
#undef dout_prefix
#define dout_prefix *_dout << "mds." << mds->get_nodeid() << " RecoveryQueue::" << __func__ << " "
class C_MDC_Recover : public MDSIOContextBase {
public:
C_MDC_Recover(RecoveryQueue *rq_, CInode *i) :
MDSIOContextBase(false), rq(rq_), in(i) {
ceph_assert(rq != NULL);
}
void print(ostream& out) const override {
out << "file_recover(" << in->ino() << ")";
}
uint64_t size = 0;
utime_t mtime;
protected:
void finish(int r) override {
rq->_recovered(in, r, size, mtime);
}
MDSRank *get_mds() override {
return rq->mds;
}
RecoveryQueue *rq;
CInode *in;
};
RecoveryQueue::RecoveryQueue(MDSRank *mds_) :
file_recover_queue(member_offset(CInode, item_dirty_dirfrag_dir)),
file_recover_queue_front(member_offset(CInode, item_dirty_dirfrag_nest)),
mds(mds_), filer(mds_->objecter, mds_->finisher)
{ }
/**
* Progress the queue. Call this after enqueuing something or on
* completion of something.
*/
void RecoveryQueue::advance()
{
dout(10) << file_recover_queue_size << " queued, "
<< file_recover_queue_front_size << " prioritized, "
<< file_recovering.size() << " recovering" << dendl;
while (file_recovering.size() < g_conf()->mds_max_file_recover) {
if (!file_recover_queue_front.empty()) {
CInode *in = file_recover_queue_front.front();
in->item_recover_queue_front.remove_myself();
file_recover_queue_front_size--;
_start(in);
} else if (!file_recover_queue.empty()) {
CInode *in = file_recover_queue.front();
in->item_recover_queue.remove_myself();
file_recover_queue_size--;
_start(in);
} else {
break;
}
}
logger->set(l_mdc_num_recovering_processing, file_recovering.size());
logger->set(l_mdc_num_recovering_enqueued, file_recover_queue_size + file_recover_queue_front_size);
logger->set(l_mdc_num_recovering_prioritized, file_recover_queue_front_size);
}
void RecoveryQueue::_start(CInode *in)
{
const auto& pi = in->get_projected_inode();
// blech
if (pi->client_ranges.size() && !pi->get_max_size()) {
mds->clog->warn() << "bad client_range " << pi->client_ranges
<< " on ino " << pi->ino;
}
auto p = file_recovering.find(in);
if (pi->client_ranges.size() && pi->get_max_size()) {
dout(10) << "starting " << pi->size << " " << pi->client_ranges
<< " " << *in << dendl;
if (p == file_recovering.end()) {
file_recovering.insert(make_pair(in, false));
C_MDC_Recover *fin = new C_MDC_Recover(this, in);
auto layout = pi->layout;
filer.probe(in->ino(), &layout, in->last,
pi->get_max_size(), &fin->size, &fin->mtime, false,
0, fin);
} else {
p->second = true;
dout(10) << "already working on " << *in << ", set need_restart flag" << dendl;
}
} else {
dout(10) << "skipping " << pi->size << " " << *in << dendl;
if (p == file_recovering.end()) {
in->state_clear(CInode::STATE_RECOVERING);
mds->locker->eval(in, CEPH_LOCK_IFILE);
in->auth_unpin(this);
}
}
}
void RecoveryQueue::prioritize(CInode *in)
{
if (file_recovering.count(in)) {
dout(10) << "already working on " << *in << dendl;
return;
}
if (!in->item_recover_queue_front.is_on_list()) {
dout(20) << *in << dendl;
ceph_assert(in->item_recover_queue.is_on_list());
in->item_recover_queue.remove_myself();
file_recover_queue_size--;
file_recover_queue_front.push_back(&in->item_recover_queue_front);
file_recover_queue_front_size++;
logger->set(l_mdc_num_recovering_prioritized, file_recover_queue_front_size);
return;
}
dout(10) << "not queued " << *in << dendl;
}
static bool _is_in_any_recover_queue(CInode *in)
{
return in->item_recover_queue.is_on_list() ||
in->item_recover_queue_front.is_on_list();
}
/**
* Given an authoritative inode which is in the cache,
* enqueue it for recovery.
*/
void RecoveryQueue::enqueue(CInode *in)
{
dout(15) << "RecoveryQueue::enqueue " << *in << dendl;
ceph_assert(logger); // Caller should have done set_logger before using me
ceph_assert(in->is_auth());
in->state_clear(CInode::STATE_NEEDSRECOVER);
if (!in->state_test(CInode::STATE_RECOVERING)) {
in->state_set(CInode::STATE_RECOVERING);
in->auth_pin(this);
logger->inc(l_mdc_recovery_started);
}
if (!_is_in_any_recover_queue(in)) {
file_recover_queue.push_back(&in->item_recover_queue);
file_recover_queue_size++;
logger->set(l_mdc_num_recovering_enqueued, file_recover_queue_size + file_recover_queue_front_size);
}
}
/**
* Call back on completion of Filer probe on an inode.
*/
void RecoveryQueue::_recovered(CInode *in, int r, uint64_t size, utime_t mtime)
{
dout(10) << "_recovered r=" << r << " size=" << size << " mtime=" << mtime
<< " for " << *in << dendl;
if (r != 0) {
dout(0) << "recovery error! " << r << dendl;
if (r == -CEPHFS_EBLOCKLISTED) {
mds->respawn();
return;
} else {
// Something wrong on the OSD side trying to recover the size
// of this inode. In principle we could record this as a piece
// of per-inode damage, but it's actually more likely that
// this indicates something wrong with the MDS (like maybe
// it has the wrong auth caps?)
mds->clog->error() << " OSD read error while recovering size"
" for inode " << in->ino();
mds->damaged();
}
}
auto p = file_recovering.find(in);
ceph_assert(p != file_recovering.end());
bool restart = p->second;
file_recovering.erase(p);
logger->set(l_mdc_num_recovering_processing, file_recovering.size());
logger->inc(l_mdc_recovery_completed);
in->state_clear(CInode::STATE_RECOVERING);
if (restart) {
if (in->item_recover_queue.is_on_list()) {
in->item_recover_queue.remove_myself();
file_recover_queue_size--;
}
if (in->item_recover_queue_front.is_on_list()) {
in->item_recover_queue_front.remove_myself();
file_recover_queue_front_size--;
}
logger->set(l_mdc_num_recovering_enqueued, file_recover_queue_size + file_recover_queue_front_size);
logger->set(l_mdc_num_recovering_prioritized, file_recover_queue_front_size);
_start(in);
} else if (!_is_in_any_recover_queue(in)) {
// journal
mds->locker->check_inode_max_size(in, true, 0, size, mtime);
mds->locker->eval(in, CEPH_LOCK_IFILE);
in->auth_unpin(this);
}
advance();
}
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