+++ /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) 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 "include/types.h"
-
-#include "CDir.h"
-#include "CDentry.h"
-#include "CInode.h"
-#include "Mutation.h"
-
-#include "MDSMap.h"
-#include "MDSRank.h"
-#include "MDCache.h"
-#include "Locker.h"
-#include "MDLog.h"
-#include "LogSegment.h"
-
-#include "common/bloom_filter.hpp"
-#include "include/Context.h"
-#include "common/Clock.h"
-
-#include "osdc/Objecter.h"
-
-#include "common/config.h"
-#include "include/assert.h"
-#include "include/compat.h"
-
-#define dout_context g_ceph_context
-#define dout_subsys ceph_subsys_mds
-#undef dout_prefix
-#define dout_prefix *_dout << "mds." << cache->mds->get_nodeid() << ".cache.dir(" << this->dirfrag() << ") "
-
-int CDir::num_frozen_trees = 0;
-int CDir::num_freezing_trees = 0;
-
-class CDirContext : public MDSInternalContextBase
-{
-protected:
- CDir *dir;
- MDSRank* get_mds() override {return dir->cache->mds;}
-
-public:
- explicit CDirContext(CDir *d) : dir(d) {
- assert(dir != NULL);
- }
-};
-
-
-class CDirIOContext : public MDSIOContextBase
-{
-protected:
- CDir *dir;
- MDSRank* get_mds() override {return dir->cache->mds;}
-
-public:
- explicit CDirIOContext(CDir *d) : dir(d) {
- assert(dir != NULL);
- }
-};
-
-
-// PINS
-//int cdir_pins[CDIR_NUM_PINS] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
-
-
-ostream& operator<<(ostream& out, const CDir& dir)
-{
- out << "[dir " << dir.dirfrag() << " " << dir.get_path() << "/"
- << " [" << dir.first << ",head]";
- if (dir.is_auth()) {
- out << " auth";
- if (dir.is_replicated())
- out << dir.get_replicas();
-
- if (dir.is_projected())
- out << " pv=" << dir.get_projected_version();
- out << " v=" << dir.get_version();
- out << " cv=" << dir.get_committing_version();
- out << "/" << dir.get_committed_version();
- } else {
- mds_authority_t a = dir.authority();
- out << " rep@" << a.first;
- if (a.second != CDIR_AUTH_UNKNOWN)
- out << "," << a.second;
- out << "." << dir.get_replica_nonce();
- }
-
- if (dir.is_rep()) out << " REP";
-
- if (dir.get_dir_auth() != CDIR_AUTH_DEFAULT) {
- if (dir.get_dir_auth().second == CDIR_AUTH_UNKNOWN)
- out << " dir_auth=" << dir.get_dir_auth().first;
- else
- out << " dir_auth=" << dir.get_dir_auth();
- }
-
- if (dir.get_cum_auth_pins())
- out << " ap=" << dir.get_auth_pins()
- << "+" << dir.get_dir_auth_pins()
- << "+" << dir.get_nested_auth_pins();
-
- out << " state=" << dir.get_state();
- if (dir.state_test(CDir::STATE_COMPLETE)) out << "|complete";
- if (dir.state_test(CDir::STATE_FREEZINGTREE)) out << "|freezingtree";
- if (dir.state_test(CDir::STATE_FROZENTREE)) out << "|frozentree";
- if (dir.state_test(CDir::STATE_AUXSUBTREE)) out << "|auxsubtree";
- //if (dir.state_test(CDir::STATE_FROZENTREELEAF)) out << "|frozentreeleaf";
- if (dir.state_test(CDir::STATE_FROZENDIR)) out << "|frozendir";
- if (dir.state_test(CDir::STATE_FREEZINGDIR)) out << "|freezingdir";
- if (dir.state_test(CDir::STATE_EXPORTBOUND)) out << "|exportbound";
- if (dir.state_test(CDir::STATE_IMPORTBOUND)) out << "|importbound";
- if (dir.state_test(CDir::STATE_BADFRAG)) out << "|badfrag";
- if (dir.state_test(CDir::STATE_FRAGMENTING)) out << "|fragmenting";
-
- // fragstat
- out << " " << dir.fnode.fragstat;
- if (!(dir.fnode.fragstat == dir.fnode.accounted_fragstat))
- out << "/" << dir.fnode.accounted_fragstat;
- if (g_conf->mds_debug_scatterstat && dir.is_projected()) {
- const fnode_t *pf = dir.get_projected_fnode();
- out << "->" << pf->fragstat;
- if (!(pf->fragstat == pf->accounted_fragstat))
- out << "/" << pf->accounted_fragstat;
- }
-
- // rstat
- out << " " << dir.fnode.rstat;
- if (!(dir.fnode.rstat == dir.fnode.accounted_rstat))
- out << "/" << dir.fnode.accounted_rstat;
- if (g_conf->mds_debug_scatterstat && dir.is_projected()) {
- const fnode_t *pf = dir.get_projected_fnode();
- out << "->" << pf->rstat;
- if (!(pf->rstat == pf->accounted_rstat))
- out << "/" << pf->accounted_rstat;
- }
-
- out << " hs=" << dir.get_num_head_items() << "+" << dir.get_num_head_null();
- out << ",ss=" << dir.get_num_snap_items() << "+" << dir.get_num_snap_null();
- if (dir.get_num_dirty())
- out << " dirty=" << dir.get_num_dirty();
-
- if (dir.get_num_ref()) {
- out << " |";
- dir.print_pin_set(out);
- }
-
- out << " " << &dir;
- return out << "]";
-}
-
-
-void CDir::print(ostream& out)
-{
- out << *this;
-}
-
-
-
-
-ostream& CDir::print_db_line_prefix(ostream& out)
-{
- return out << ceph_clock_now() << " mds." << cache->mds->get_nodeid() << ".cache.dir(" << this->dirfrag() << ") ";
-}
-
-
-
-// -------------------------------------------------------------------
-// CDir
-
-CDir::CDir(CInode *in, frag_t fg, MDCache *mdcache, bool auth) :
- cache(mdcache), inode(in), frag(fg),
- first(2),
- dirty_rstat_inodes(member_offset(CInode, dirty_rstat_item)),
- projected_version(0), item_dirty(this), item_new(this),
- num_head_items(0), num_head_null(0),
- num_snap_items(0), num_snap_null(0),
- num_dirty(0), committing_version(0), committed_version(0),
- dir_auth_pins(0), request_pins(0),
- dir_rep(REP_NONE),
- pop_me(ceph_clock_now()),
- pop_nested(ceph_clock_now()),
- pop_auth_subtree(ceph_clock_now()),
- pop_auth_subtree_nested(ceph_clock_now()),
- num_dentries_nested(0), num_dentries_auth_subtree(0),
- num_dentries_auth_subtree_nested(0),
- dir_auth(CDIR_AUTH_DEFAULT)
-{
- state = STATE_INITIAL;
-
- memset(&fnode, 0, sizeof(fnode));
-
- // auth
- assert(in->is_dir());
- if (auth)
- state |= STATE_AUTH;
-}
-
-/**
- * Check the recursive statistics on size for consistency.
- * If mds_debug_scatterstat is enabled, assert for correctness,
- * otherwise just print out the mismatch and continue.
- */
-bool CDir::check_rstats(bool scrub)
-{
- if (!g_conf->mds_debug_scatterstat && !scrub)
- return true;
-
- dout(25) << "check_rstats on " << this << dendl;
- if (!is_complete() || !is_auth() || is_frozen()) {
- assert(!scrub);
- dout(10) << "check_rstats bailing out -- incomplete or non-auth or frozen dir!" << dendl;
- return true;
- }
-
- frag_info_t frag_info;
- nest_info_t nest_info;
- for (map_t::iterator i = items.begin(); i != items.end(); ++i) {
- if (i->second->last != CEPH_NOSNAP)
- continue;
- CDentry::linkage_t *dnl = i->second->get_linkage();
- if (dnl->is_primary()) {
- CInode *in = dnl->get_inode();
- nest_info.add(in->inode.accounted_rstat);
- if (in->is_dir())
- frag_info.nsubdirs++;
- else
- frag_info.nfiles++;
- } else if (dnl->is_remote())
- frag_info.nfiles++;
- }
-
- bool good = true;
- // fragstat
- if(!frag_info.same_sums(fnode.fragstat)) {
- dout(1) << "mismatch between head items and fnode.fragstat! printing dentries" << dendl;
- dout(1) << "get_num_head_items() = " << get_num_head_items()
- << "; fnode.fragstat.nfiles=" << fnode.fragstat.nfiles
- << " fnode.fragstat.nsubdirs=" << fnode.fragstat.nsubdirs << dendl;
- good = false;
- } else {
- dout(20) << "get_num_head_items() = " << get_num_head_items()
- << "; fnode.fragstat.nfiles=" << fnode.fragstat.nfiles
- << " fnode.fragstat.nsubdirs=" << fnode.fragstat.nsubdirs << dendl;
- }
-
- // rstat
- if (!nest_info.same_sums(fnode.rstat)) {
- dout(1) << "mismatch between child accounted_rstats and my rstats!" << dendl;
- dout(1) << "total of child dentrys: " << nest_info << dendl;
- dout(1) << "my rstats: " << fnode.rstat << dendl;
- good = false;
- } else {
- dout(20) << "total of child dentrys: " << nest_info << dendl;
- dout(20) << "my rstats: " << fnode.rstat << dendl;
- }
-
- if (!good) {
- if (!scrub) {
- for (map_t::iterator i = items.begin(); i != items.end(); ++i) {
- CDentry *dn = i->second;
- if (dn->get_linkage()->is_primary()) {
- CInode *in = dn->get_linkage()->inode;
- dout(1) << *dn << " rstat " << in->inode.accounted_rstat << dendl;
- } else {
- dout(1) << *dn << dendl;
- }
- }
-
- assert(frag_info.nfiles == fnode.fragstat.nfiles);
- assert(frag_info.nsubdirs == fnode.fragstat.nsubdirs);
- assert(nest_info.rbytes == fnode.rstat.rbytes);
- assert(nest_info.rfiles == fnode.rstat.rfiles);
- assert(nest_info.rsubdirs == fnode.rstat.rsubdirs);
- }
- }
- dout(10) << "check_rstats complete on " << this << dendl;
- return good;
-}
-
-CDentry *CDir::lookup(const string& name, snapid_t snap)
-{
- dout(20) << "lookup (" << snap << ", '" << name << "')" << dendl;
- map_t::iterator iter = items.lower_bound(dentry_key_t(snap, name.c_str(),
- inode->hash_dentry_name(name)));
- if (iter == items.end())
- return 0;
- if (iter->second->name == name &&
- iter->second->first <= snap &&
- iter->second->last >= snap) {
- dout(20) << " hit -> " << iter->first << dendl;
- return iter->second;
- }
- dout(20) << " miss -> " << iter->first << dendl;
- return 0;
-}
-
-CDentry *CDir::lookup_exact_snap(const string& name, snapid_t last) {
- map_t::iterator p = items.find(dentry_key_t(last, name.c_str(),
- inode->hash_dentry_name(name)));
- if (p == items.end())
- return NULL;
- return p->second;
-}
-
-/***
- * linking fun
- */
-
-CDentry* CDir::add_null_dentry(const string& dname,
- snapid_t first, snapid_t last)
-{
- // foreign
- assert(lookup_exact_snap(dname, last) == 0);
-
- // create dentry
- CDentry* dn = new CDentry(dname, inode->hash_dentry_name(dname), first, last);
- if (is_auth())
- dn->state_set(CDentry::STATE_AUTH);
-
- cache->bottom_lru.lru_insert_mid(dn);
- dn->state_set(CDentry::STATE_BOTTOMLRU);
-
- dn->dir = this;
- dn->version = get_projected_version();
-
- // add to dir
- assert(items.count(dn->key()) == 0);
- //assert(null_items.count(dn->name) == 0);
-
- items[dn->key()] = dn;
- if (last == CEPH_NOSNAP)
- num_head_null++;
- else
- num_snap_null++;
-
- if (state_test(CDir::STATE_DNPINNEDFRAG)) {
- dn->get(CDentry::PIN_FRAGMENTING);
- dn->state_set(CDentry::STATE_FRAGMENTING);
- }
-
- dout(12) << "add_null_dentry " << *dn << dendl;
-
- // pin?
- if (get_num_any() == 1)
- get(PIN_CHILD);
-
- assert(get_num_any() == items.size());
- return dn;
-}
-
-
-CDentry* CDir::add_primary_dentry(const string& dname, CInode *in,
- snapid_t first, snapid_t last)
-{
- // primary
- assert(lookup_exact_snap(dname, last) == 0);
-
- // create dentry
- CDentry* dn = new CDentry(dname, inode->hash_dentry_name(dname), first, last);
- if (is_auth())
- dn->state_set(CDentry::STATE_AUTH);
- if (is_auth() || !inode->is_stray()) {
- cache->lru.lru_insert_mid(dn);
- } else {
- cache->bottom_lru.lru_insert_mid(dn);
- dn->state_set(CDentry::STATE_BOTTOMLRU);
- }
-
- dn->dir = this;
- dn->version = get_projected_version();
-
- // add to dir
- assert(items.count(dn->key()) == 0);
- //assert(null_items.count(dn->name) == 0);
-
- items[dn->key()] = dn;
-
- dn->get_linkage()->inode = in;
- in->set_primary_parent(dn);
-
- link_inode_work(dn, in);
-
- if (dn->last == CEPH_NOSNAP)
- num_head_items++;
- else
- num_snap_items++;
-
- if (state_test(CDir::STATE_DNPINNEDFRAG)) {
- dn->get(CDentry::PIN_FRAGMENTING);
- dn->state_set(CDentry::STATE_FRAGMENTING);
- }
-
- dout(12) << "add_primary_dentry " << *dn << dendl;
-
- // pin?
- if (get_num_any() == 1)
- get(PIN_CHILD);
- assert(get_num_any() == items.size());
- return dn;
-}
-
-CDentry* CDir::add_remote_dentry(const string& dname, inodeno_t ino, unsigned char d_type,
- snapid_t first, snapid_t last)
-{
- // foreign
- assert(lookup_exact_snap(dname, last) == 0);
-
- // create dentry
- CDentry* dn = new CDentry(dname, inode->hash_dentry_name(dname), ino, d_type, first, last);
- if (is_auth())
- dn->state_set(CDentry::STATE_AUTH);
- cache->lru.lru_insert_mid(dn);
-
- dn->dir = this;
- dn->version = get_projected_version();
-
- // add to dir
- assert(items.count(dn->key()) == 0);
- //assert(null_items.count(dn->name) == 0);
-
- items[dn->key()] = dn;
- if (last == CEPH_NOSNAP)
- num_head_items++;
- else
- num_snap_items++;
-
- if (state_test(CDir::STATE_DNPINNEDFRAG)) {
- dn->get(CDentry::PIN_FRAGMENTING);
- dn->state_set(CDentry::STATE_FRAGMENTING);
- }
-
- dout(12) << "add_remote_dentry " << *dn << dendl;
-
- // pin?
- if (get_num_any() == 1)
- get(PIN_CHILD);
-
- assert(get_num_any() == items.size());
- return dn;
-}
-
-
-
-void CDir::remove_dentry(CDentry *dn)
-{
- dout(12) << "remove_dentry " << *dn << dendl;
-
- // there should be no client leases at this point!
- assert(dn->client_lease_map.empty());
-
- if (state_test(CDir::STATE_DNPINNEDFRAG)) {
- dn->put(CDentry::PIN_FRAGMENTING);
- dn->state_clear(CDentry::STATE_FRAGMENTING);
- }
-
- if (dn->get_linkage()->is_null()) {
- if (dn->last == CEPH_NOSNAP)
- num_head_null--;
- else
- num_snap_null--;
- } else {
- if (dn->last == CEPH_NOSNAP)
- num_head_items--;
- else
- num_snap_items--;
- }
-
- if (!dn->get_linkage()->is_null())
- // detach inode and dentry
- unlink_inode_work(dn);
-
- // remove from list
- assert(items.count(dn->key()) == 1);
- items.erase(dn->key());
-
- // clean?
- if (dn->is_dirty())
- dn->mark_clean();
-
- if (dn->state_test(CDentry::STATE_BOTTOMLRU))
- cache->bottom_lru.lru_remove(dn);
- else
- cache->lru.lru_remove(dn);
- delete dn;
-
- // unpin?
- if (get_num_any() == 0)
- put(PIN_CHILD);
- assert(get_num_any() == items.size());
-}
-
-void CDir::link_remote_inode(CDentry *dn, CInode *in)
-{
- link_remote_inode(dn, in->ino(), IFTODT(in->get_projected_inode()->mode));
-}
-
-void CDir::link_remote_inode(CDentry *dn, inodeno_t ino, unsigned char d_type)
-{
- dout(12) << "link_remote_inode " << *dn << " remote " << ino << dendl;
- assert(dn->get_linkage()->is_null());
-
- dn->get_linkage()->set_remote(ino, d_type);
-
- if (dn->state_test(CDentry::STATE_BOTTOMLRU)) {
- cache->bottom_lru.lru_remove(dn);
- cache->lru.lru_insert_mid(dn);
- dn->state_clear(CDentry::STATE_BOTTOMLRU);
- }
-
- if (dn->last == CEPH_NOSNAP) {
- num_head_items++;
- num_head_null--;
- } else {
- num_snap_items++;
- num_snap_null--;
- }
- assert(get_num_any() == items.size());
-}
-
-void CDir::link_primary_inode(CDentry *dn, CInode *in)
-{
- dout(12) << "link_primary_inode " << *dn << " " << *in << dendl;
- assert(dn->get_linkage()->is_null());
-
- dn->get_linkage()->inode = in;
- in->set_primary_parent(dn);
-
- link_inode_work(dn, in);
-
- if (dn->state_test(CDentry::STATE_BOTTOMLRU) &&
- (is_auth() || !inode->is_stray())) {
- cache->bottom_lru.lru_remove(dn);
- cache->lru.lru_insert_mid(dn);
- dn->state_clear(CDentry::STATE_BOTTOMLRU);
- }
-
- if (dn->last == CEPH_NOSNAP) {
- num_head_items++;
- num_head_null--;
- } else {
- num_snap_items++;
- num_snap_null--;
- }
-
- assert(get_num_any() == items.size());
-}
-
-void CDir::link_inode_work( CDentry *dn, CInode *in)
-{
- assert(dn->get_linkage()->get_inode() == in);
- assert(in->get_parent_dn() == dn);
-
- // set inode version
- //in->inode.version = dn->get_version();
-
- // pin dentry?
- if (in->get_num_ref())
- dn->get(CDentry::PIN_INODEPIN);
-
- // adjust auth pin count
- if (in->auth_pins + in->nested_auth_pins)
- dn->adjust_nested_auth_pins(in->auth_pins + in->nested_auth_pins, in->auth_pins, NULL);
-
- // verify open snaprealm parent
- if (in->snaprealm)
- in->snaprealm->adjust_parent();
- else if (in->is_any_caps())
- in->move_to_realm(inode->find_snaprealm());
-}
-
-void CDir::unlink_inode(CDentry *dn, bool adjust_lru)
-{
- if (dn->get_linkage()->is_primary()) {
- dout(12) << "unlink_inode " << *dn << " " << *dn->get_linkage()->get_inode() << dendl;
- } else {
- dout(12) << "unlink_inode " << *dn << dendl;
- }
-
- unlink_inode_work(dn);
-
- if (adjust_lru && !dn->state_test(CDentry::STATE_BOTTOMLRU)) {
- cache->lru.lru_remove(dn);
- cache->bottom_lru.lru_insert_mid(dn);
- dn->state_set(CDentry::STATE_BOTTOMLRU);
- }
-
- if (dn->last == CEPH_NOSNAP) {
- num_head_items--;
- num_head_null++;
- } else {
- num_snap_items--;
- num_snap_null++;
- }
- assert(get_num_any() == items.size());
-}
-
-
-void CDir::try_remove_unlinked_dn(CDentry *dn)
-{
- assert(dn->dir == this);
- assert(dn->get_linkage()->is_null());
-
- // no pins (besides dirty)?
- if (dn->get_num_ref() != dn->is_dirty())
- return;
-
- // was the dn new?
- if (dn->is_new()) {
- dout(10) << "try_remove_unlinked_dn " << *dn << " in " << *this << dendl;
- if (dn->is_dirty())
- dn->mark_clean();
- remove_dentry(dn);
-
- // NOTE: we may not have any more dirty dentries, but the fnode
- // still changed, so the directory must remain dirty.
- }
-}
-
-
-void CDir::unlink_inode_work( CDentry *dn )
-{
- CInode *in = dn->get_linkage()->get_inode();
-
- if (dn->get_linkage()->is_remote()) {
- // remote
- if (in)
- dn->unlink_remote(dn->get_linkage());
-
- dn->get_linkage()->set_remote(0, 0);
- } else if (dn->get_linkage()->is_primary()) {
- // primary
- // unpin dentry?
- if (in->get_num_ref())
- dn->put(CDentry::PIN_INODEPIN);
-
- // unlink auth_pin count
- if (in->auth_pins + in->nested_auth_pins)
- dn->adjust_nested_auth_pins(0 - (in->auth_pins + in->nested_auth_pins), 0 - in->auth_pins, NULL);
-
- // detach inode
- in->remove_primary_parent(dn);
- dn->get_linkage()->inode = 0;
- } else {
- assert(!dn->get_linkage()->is_null());
- }
-}
-
-void CDir::add_to_bloom(CDentry *dn)
-{
- assert(dn->last == CEPH_NOSNAP);
- if (!bloom) {
- /* not create bloom filter for incomplete dir that was added by log replay */
- if (!is_complete())
- return;
-
- /* don't maintain bloom filters in standby replay (saves cycles, and also
- * avoids need to implement clearing it in EExport for #16924) */
- if (cache->mds->is_standby_replay()) {
- return;
- }
-
- unsigned size = get_num_head_items() + get_num_snap_items();
- if (size < 100) size = 100;
- bloom.reset(new bloom_filter(size, 1.0 / size, 0));
- }
- /* This size and false positive probability is completely random.*/
- bloom->insert(dn->name.c_str(), dn->name.size());
-}
-
-bool CDir::is_in_bloom(const string& name)
-{
- if (!bloom)
- return false;
- return bloom->contains(name.c_str(), name.size());
-}
-
-void CDir::remove_null_dentries() {
- dout(12) << "remove_null_dentries " << *this << dendl;
-
- CDir::map_t::iterator p = items.begin();
- while (p != items.end()) {
- CDentry *dn = p->second;
- ++p;
- if (dn->get_linkage()->is_null() && !dn->is_projected())
- remove_dentry(dn);
- }
-
- assert(num_snap_null == 0);
- assert(num_head_null == 0);
- assert(get_num_any() == items.size());
-}
-
-/** remove dirty null dentries for deleted directory. the dirfrag will be
- * deleted soon, so it's safe to not commit dirty dentries.
- *
- * This is called when a directory is being deleted, a prerequisite
- * of which is that its children have been unlinked: we expect to only see
- * null, unprojected dentries here.
- */
-void CDir::try_remove_dentries_for_stray()
-{
- dout(10) << __func__ << dendl;
- assert(get_parent_dir()->inode->is_stray());
-
- // clear dirty only when the directory was not snapshotted
- bool clear_dirty = !inode->snaprealm;
-
- CDir::map_t::iterator p = items.begin();
- while (p != items.end()) {
- CDentry *dn = p->second;
- ++p;
- if (dn->last == CEPH_NOSNAP) {
- assert(!dn->is_projected());
- assert(dn->get_linkage()->is_null());
- if (clear_dirty && dn->is_dirty())
- dn->mark_clean();
- // It's OK to remove lease prematurely because we will never link
- // the dentry to inode again.
- if (dn->is_any_leases())
- dn->remove_client_leases(cache->mds->locker);
- if (dn->get_num_ref() == 0)
- remove_dentry(dn);
- } else {
- assert(!dn->is_projected());
- CDentry::linkage_t *dnl= dn->get_linkage();
- CInode *in = NULL;
- if (dnl->is_primary()) {
- in = dnl->get_inode();
- if (clear_dirty && in->is_dirty())
- in->mark_clean();
- }
- if (clear_dirty && dn->is_dirty())
- dn->mark_clean();
- if (dn->get_num_ref() == 0) {
- remove_dentry(dn);
- if (in)
- cache->remove_inode(in);
- }
- }
- }
-
- if (clear_dirty && is_dirty())
- mark_clean();
-}
-
-bool CDir::try_trim_snap_dentry(CDentry *dn, const set<snapid_t>& snaps)
-{
- assert(dn->last != CEPH_NOSNAP);
- set<snapid_t>::const_iterator p = snaps.lower_bound(dn->first);
- CDentry::linkage_t *dnl= dn->get_linkage();
- CInode *in = 0;
- if (dnl->is_primary())
- in = dnl->get_inode();
- if ((p == snaps.end() || *p > dn->last) &&
- (dn->get_num_ref() == dn->is_dirty()) &&
- (!in || in->get_num_ref() == in->is_dirty())) {
- dout(10) << " purging snapped " << *dn << dendl;
- if (in && in->is_dirty())
- in->mark_clean();
- remove_dentry(dn);
- if (in) {
- dout(10) << " purging snapped " << *in << dendl;
- cache->remove_inode(in);
- }
- return true;
- }
- return false;
-}
-
-
-void CDir::purge_stale_snap_data(const set<snapid_t>& snaps)
-{
- dout(10) << "purge_stale_snap_data " << snaps << dendl;
-
- CDir::map_t::iterator p = items.begin();
- while (p != items.end()) {
- CDentry *dn = p->second;
- ++p;
-
- if (dn->last == CEPH_NOSNAP)
- continue;
-
- try_trim_snap_dentry(dn, snaps);
- }
-}
-
-
-/**
- * steal_dentry -- semi-violently move a dentry from one CDir to another
- * (*) violently, in that nitems, most pins, etc. are not correctly maintained
- * on the old CDir corpse; must call finish_old_fragment() when finished.
- */
-void CDir::steal_dentry(CDentry *dn)
-{
- dout(15) << "steal_dentry " << *dn << dendl;
-
- items[dn->key()] = dn;
-
- dn->dir->items.erase(dn->key());
- if (dn->dir->items.empty())
- dn->dir->put(PIN_CHILD);
-
- if (get_num_any() == 0)
- get(PIN_CHILD);
- if (dn->get_linkage()->is_null()) {
- if (dn->last == CEPH_NOSNAP)
- num_head_null++;
- else
- num_snap_null++;
- } else if (dn->last == CEPH_NOSNAP) {
- num_head_items++;
-
- if (dn->get_linkage()->is_primary()) {
- CInode *in = dn->get_linkage()->get_inode();
- inode_t *pi = in->get_projected_inode();
- if (dn->get_linkage()->get_inode()->is_dir())
- fnode.fragstat.nsubdirs++;
- else
- fnode.fragstat.nfiles++;
- fnode.rstat.rbytes += pi->accounted_rstat.rbytes;
- fnode.rstat.rfiles += pi->accounted_rstat.rfiles;
- fnode.rstat.rsubdirs += pi->accounted_rstat.rsubdirs;
- fnode.rstat.rsnaprealms += pi->accounted_rstat.rsnaprealms;
- if (pi->accounted_rstat.rctime > fnode.rstat.rctime)
- fnode.rstat.rctime = pi->accounted_rstat.rctime;
-
- // move dirty inode rstat to new dirfrag
- if (in->is_dirty_rstat())
- dirty_rstat_inodes.push_back(&in->dirty_rstat_item);
- } else if (dn->get_linkage()->is_remote()) {
- if (dn->get_linkage()->get_remote_d_type() == DT_DIR)
- fnode.fragstat.nsubdirs++;
- else
- fnode.fragstat.nfiles++;
- }
- } else {
- num_snap_items++;
- if (dn->get_linkage()->is_primary()) {
- CInode *in = dn->get_linkage()->get_inode();
- if (in->is_dirty_rstat())
- dirty_rstat_inodes.push_back(&in->dirty_rstat_item);
- }
- }
-
- if (dn->auth_pins || dn->nested_auth_pins) {
- // use the helpers here to maintain the auth_pin invariants on the dir inode
- int ap = dn->get_num_auth_pins() + dn->get_num_nested_auth_pins();
- int dap = dn->get_num_dir_auth_pins();
- assert(dap <= ap);
- adjust_nested_auth_pins(ap, dap, NULL);
- dn->dir->adjust_nested_auth_pins(-ap, -dap, NULL);
- }
-
- if (dn->is_dirty())
- num_dirty++;
-
- dn->dir = this;
-}
-
-void CDir::prepare_old_fragment(map<string_snap_t, std::list<MDSInternalContextBase*> >& dentry_waiters, bool replay)
-{
- // auth_pin old fragment for duration so that any auth_pinning
- // during the dentry migration doesn't trigger side effects
- if (!replay && is_auth())
- auth_pin(this);
-
- if (!waiting_on_dentry.empty()) {
- for (auto p = waiting_on_dentry.begin(); p != waiting_on_dentry.end(); ++p)
- dentry_waiters[p->first].swap(p->second);
- waiting_on_dentry.clear();
- put(PIN_DNWAITER);
- }
-}
-
-void CDir::prepare_new_fragment(bool replay)
-{
- if (!replay && is_auth()) {
- _freeze_dir();
- mark_complete();
- }
- inode->add_dirfrag(this);
-}
-
-void CDir::finish_old_fragment(list<MDSInternalContextBase*>& waiters, bool replay)
-{
- // take waiters _before_ unfreeze...
- if (!replay) {
- take_waiting(WAIT_ANY_MASK, waiters);
- if (is_auth()) {
- auth_unpin(this); // pinned in prepare_old_fragment
- assert(is_frozen_dir());
- unfreeze_dir();
- }
- }
-
- assert(nested_auth_pins == 0);
- assert(dir_auth_pins == 0);
- assert(auth_pins == 0);
-
- num_head_items = num_head_null = 0;
- num_snap_items = num_snap_null = 0;
-
- // this mirrors init_fragment_pins()
- if (is_auth())
- clear_replica_map();
- if (is_dirty())
- mark_clean();
- if (state_test(STATE_IMPORTBOUND))
- put(PIN_IMPORTBOUND);
- if (state_test(STATE_EXPORTBOUND))
- put(PIN_EXPORTBOUND);
- if (is_subtree_root())
- put(PIN_SUBTREE);
-
- if (auth_pins > 0)
- put(PIN_AUTHPIN);
-
- assert(get_num_ref() == (state_test(STATE_STICKY) ? 1:0));
-}
-
-void CDir::init_fragment_pins()
-{
- if (is_replicated())
- get(PIN_REPLICATED);
- if (state_test(STATE_DIRTY))
- get(PIN_DIRTY);
- if (state_test(STATE_EXPORTBOUND))
- get(PIN_EXPORTBOUND);
- if (state_test(STATE_IMPORTBOUND))
- get(PIN_IMPORTBOUND);
- if (is_subtree_root())
- get(PIN_SUBTREE);
-}
-
-void CDir::split(int bits, list<CDir*>& subs, list<MDSInternalContextBase*>& waiters, bool replay)
-{
- dout(10) << "split by " << bits << " bits on " << *this << dendl;
-
- assert(replay || is_complete() || !is_auth());
-
- list<frag_t> frags;
- frag.split(bits, frags);
-
- vector<CDir*> subfrags(1 << bits);
-
- double fac = 1.0 / (double)(1 << bits); // for scaling load vecs
-
- version_t rstat_version = inode->get_projected_inode()->rstat.version;
- version_t dirstat_version = inode->get_projected_inode()->dirstat.version;
-
- nest_info_t rstatdiff;
- frag_info_t fragstatdiff;
- if (fnode.accounted_rstat.version == rstat_version)
- rstatdiff.add_delta(fnode.accounted_rstat, fnode.rstat);
- if (fnode.accounted_fragstat.version == dirstat_version)
- fragstatdiff.add_delta(fnode.accounted_fragstat, fnode.fragstat);
- dout(10) << " rstatdiff " << rstatdiff << " fragstatdiff " << fragstatdiff << dendl;
-
- map<string_snap_t, std::list<MDSInternalContextBase*> > dentry_waiters;
- prepare_old_fragment(dentry_waiters, replay);
-
- // create subfrag dirs
- int n = 0;
- for (list<frag_t>::iterator p = frags.begin(); p != frags.end(); ++p) {
- CDir *f = new CDir(inode, *p, cache, is_auth());
- f->state_set(state & (MASK_STATE_FRAGMENT_KEPT | STATE_COMPLETE));
- f->get_replicas() = get_replicas();
- f->dir_auth = dir_auth;
- f->init_fragment_pins();
- f->set_version(get_version());
-
- f->pop_me = pop_me;
- f->pop_me.scale(fac);
-
- // FIXME; this is an approximation
- f->pop_nested = pop_nested;
- f->pop_nested.scale(fac);
- f->pop_auth_subtree = pop_auth_subtree;
- f->pop_auth_subtree.scale(fac);
- f->pop_auth_subtree_nested = pop_auth_subtree_nested;
- f->pop_auth_subtree_nested.scale(fac);
-
- dout(10) << " subfrag " << *p << " " << *f << dendl;
- subfrags[n++] = f;
- subs.push_back(f);
-
- f->set_dir_auth(get_dir_auth());
- f->prepare_new_fragment(replay);
- }
-
- // repartition dentries
- while (!items.empty()) {
- CDir::map_t::iterator p = items.begin();
-
- CDentry *dn = p->second;
- frag_t subfrag = inode->pick_dirfrag(dn->name);
- int n = (subfrag.value() & (subfrag.mask() ^ frag.mask())) >> subfrag.mask_shift();
- dout(15) << " subfrag " << subfrag << " n=" << n << " for " << p->first << dendl;
- CDir *f = subfrags[n];
- f->steal_dentry(dn);
- }
-
- for (auto& p : dentry_waiters) {
- frag_t subfrag = inode->pick_dirfrag(p.first.name);
- int n = (subfrag.value() & (subfrag.mask() ^ frag.mask())) >> subfrag.mask_shift();
- CDir *f = subfrags[n];
-
- if (f->waiting_on_dentry.empty())
- f->get(PIN_DNWAITER);
- f->waiting_on_dentry[p.first].swap(p.second);
- }
-
- // FIXME: handle dirty old rstat
-
- // fix up new frag fragstats
- for (int i=0; i<n; i++) {
- CDir *f = subfrags[i];
- f->fnode.rstat.version = rstat_version;
- f->fnode.accounted_rstat = f->fnode.rstat;
- f->fnode.fragstat.version = dirstat_version;
- f->fnode.accounted_fragstat = f->fnode.fragstat;
- dout(10) << " rstat " << f->fnode.rstat << " fragstat " << f->fnode.fragstat
- << " on " << *f << dendl;
- }
-
- // give any outstanding frag stat differential to first frag
- dout(10) << " giving rstatdiff " << rstatdiff << " fragstatdiff" << fragstatdiff
- << " to " << *subfrags[0] << dendl;
- subfrags[0]->fnode.accounted_rstat.add(rstatdiff);
- subfrags[0]->fnode.accounted_fragstat.add(fragstatdiff);
-
- finish_old_fragment(waiters, replay);
-}
-
-void CDir::merge(list<CDir*>& subs, list<MDSInternalContextBase*>& waiters, bool replay)
-{
- dout(10) << "merge " << subs << dendl;
-
- mds_authority_t new_auth = CDIR_AUTH_DEFAULT;
- for (auto dir : subs) {
- if (dir->get_dir_auth() != CDIR_AUTH_DEFAULT &&
- dir->get_dir_auth() != new_auth) {
- assert(new_auth == CDIR_AUTH_DEFAULT);
- new_auth = dir->get_dir_auth();
- }
- }
-
- set_dir_auth(new_auth);
- prepare_new_fragment(replay);
-
- nest_info_t rstatdiff;
- frag_info_t fragstatdiff;
- bool touched_mtime, touched_chattr;
- version_t rstat_version = inode->get_projected_inode()->rstat.version;
- version_t dirstat_version = inode->get_projected_inode()->dirstat.version;
-
- map<string_snap_t, std::list<MDSInternalContextBase*> > dentry_waiters;
-
- for (auto dir : subs) {
- dout(10) << " subfrag " << dir->get_frag() << " " << *dir << dendl;
- assert(!dir->is_auth() || dir->is_complete() || replay);
-
- if (dir->fnode.accounted_rstat.version == rstat_version)
- rstatdiff.add_delta(dir->fnode.accounted_rstat, dir->fnode.rstat);
- if (dir->fnode.accounted_fragstat.version == dirstat_version)
- fragstatdiff.add_delta(dir->fnode.accounted_fragstat, dir->fnode.fragstat,
- &touched_mtime, &touched_chattr);
-
- dir->prepare_old_fragment(dentry_waiters, replay);
-
- // steal dentries
- while (!dir->items.empty())
- steal_dentry(dir->items.begin()->second);
-
- // merge replica map
- for (const auto &p : dir->get_replicas()) {
- unsigned cur = get_replicas()[p.first];
- if (p.second > cur)
- get_replicas()[p.first] = p.second;
- }
-
- // merge version
- if (dir->get_version() > get_version())
- set_version(dir->get_version());
-
- // merge state
- state_set(dir->get_state() & MASK_STATE_FRAGMENT_KEPT);
-
- dir->finish_old_fragment(waiters, replay);
- inode->close_dirfrag(dir->get_frag());
- }
-
- if (!dentry_waiters.empty()) {
- get(PIN_DNWAITER);
- for (auto& p : dentry_waiters) {
- waiting_on_dentry[p.first].swap(p.second);
- }
- }
-
- if (is_auth() && !replay)
- mark_complete();
-
- // FIXME: merge dirty old rstat
- fnode.rstat.version = rstat_version;
- fnode.accounted_rstat = fnode.rstat;
- fnode.accounted_rstat.add(rstatdiff);
-
- fnode.fragstat.version = dirstat_version;
- fnode.accounted_fragstat = fnode.fragstat;
- fnode.accounted_fragstat.add(fragstatdiff);
-
- init_fragment_pins();
-}
-
-
-
-
-void CDir::resync_accounted_fragstat()
-{
- fnode_t *pf = get_projected_fnode();
- inode_t *pi = inode->get_projected_inode();
-
- if (pf->accounted_fragstat.version != pi->dirstat.version) {
- pf->fragstat.version = pi->dirstat.version;
- dout(10) << "resync_accounted_fragstat " << pf->accounted_fragstat << " -> " << pf->fragstat << dendl;
- pf->accounted_fragstat = pf->fragstat;
- }
-}
-
-/*
- * resync rstat and accounted_rstat with inode
- */
-void CDir::resync_accounted_rstat()
-{
- fnode_t *pf = get_projected_fnode();
- inode_t *pi = inode->get_projected_inode();
-
- if (pf->accounted_rstat.version != pi->rstat.version) {
- pf->rstat.version = pi->rstat.version;
- dout(10) << "resync_accounted_rstat " << pf->accounted_rstat << " -> " << pf->rstat << dendl;
- pf->accounted_rstat = pf->rstat;
- dirty_old_rstat.clear();
- }
-}
-
-void CDir::assimilate_dirty_rstat_inodes()
-{
- dout(10) << "assimilate_dirty_rstat_inodes" << dendl;
- for (elist<CInode*>::iterator p = dirty_rstat_inodes.begin_use_current();
- !p.end(); ++p) {
- CInode *in = *p;
- assert(in->is_auth());
- if (in->is_frozen())
- continue;
-
- inode_t *pi = in->project_inode();
- pi->version = in->pre_dirty();
-
- inode->mdcache->project_rstat_inode_to_frag(in, this, 0, 0, NULL);
- }
- state_set(STATE_ASSIMRSTAT);
- dout(10) << "assimilate_dirty_rstat_inodes done" << dendl;
-}
-
-void CDir::assimilate_dirty_rstat_inodes_finish(MutationRef& mut, EMetaBlob *blob)
-{
- if (!state_test(STATE_ASSIMRSTAT))
- return;
- state_clear(STATE_ASSIMRSTAT);
- dout(10) << "assimilate_dirty_rstat_inodes_finish" << dendl;
- elist<CInode*>::iterator p = dirty_rstat_inodes.begin_use_current();
- while (!p.end()) {
- CInode *in = *p;
- ++p;
-
- if (in->is_frozen())
- continue;
-
- CDentry *dn = in->get_projected_parent_dn();
-
- mut->auth_pin(in);
- mut->add_projected_inode(in);
-
- in->clear_dirty_rstat();
- blob->add_primary_dentry(dn, in, true);
- }
-
- if (!dirty_rstat_inodes.empty())
- inode->mdcache->mds->locker->mark_updated_scatterlock(&inode->nestlock);
-}
-
-
-
-
-/****************************************
- * WAITING
- */
-
-void CDir::add_dentry_waiter(const string& dname, snapid_t snapid, MDSInternalContextBase *c)
-{
- if (waiting_on_dentry.empty())
- get(PIN_DNWAITER);
- waiting_on_dentry[string_snap_t(dname, snapid)].push_back(c);
- dout(10) << "add_dentry_waiter dentry " << dname
- << " snap " << snapid
- << " " << c << " on " << *this << dendl;
-}
-
-void CDir::take_dentry_waiting(const string& dname, snapid_t first, snapid_t last,
- list<MDSInternalContextBase*>& ls)
-{
- if (waiting_on_dentry.empty())
- return;
-
- string_snap_t lb(dname, first);
- string_snap_t ub(dname, last);
- compact_map<string_snap_t, list<MDSInternalContextBase*> >::iterator p = waiting_on_dentry.lower_bound(lb);
- while (p != waiting_on_dentry.end() &&
- !(ub < p->first)) {
- dout(10) << "take_dentry_waiting dentry " << dname
- << " [" << first << "," << last << "] found waiter on snap "
- << p->first.snapid
- << " on " << *this << dendl;
- ls.splice(ls.end(), p->second);
- waiting_on_dentry.erase(p++);
- }
-
- if (waiting_on_dentry.empty())
- put(PIN_DNWAITER);
-}
-
-void CDir::take_sub_waiting(list<MDSInternalContextBase*>& ls)
-{
- dout(10) << "take_sub_waiting" << dendl;
- if (!waiting_on_dentry.empty()) {
- for (compact_map<string_snap_t, list<MDSInternalContextBase*> >::iterator p = waiting_on_dentry.begin();
- p != waiting_on_dentry.end();
- ++p)
- ls.splice(ls.end(), p->second);
- waiting_on_dentry.clear();
- put(PIN_DNWAITER);
- }
-}
-
-
-
-void CDir::add_waiter(uint64_t tag, MDSInternalContextBase *c)
-{
- // hierarchical?
-
- // at free root?
- if (tag & WAIT_ATFREEZEROOT) {
- if (!(is_freezing_tree_root() || is_frozen_tree_root() ||
- is_freezing_dir() || is_frozen_dir())) {
- // try parent
- dout(10) << "add_waiter " << std::hex << tag << std::dec << " " << c << " should be ATFREEZEROOT, " << *this << " is not root, trying parent" << dendl;
- inode->parent->dir->add_waiter(tag, c);
- return;
- }
- }
-
- // at subtree root?
- if (tag & WAIT_ATSUBTREEROOT) {
- if (!is_subtree_root()) {
- // try parent
- dout(10) << "add_waiter " << std::hex << tag << std::dec << " " << c << " should be ATSUBTREEROOT, " << *this << " is not root, trying parent" << dendl;
- inode->parent->dir->add_waiter(tag, c);
- return;
- }
- }
-
- assert(!(tag & WAIT_CREATED) || state_test(STATE_CREATING));
-
- MDSCacheObject::add_waiter(tag, c);
-}
-
-
-
-/* NOTE: this checks dentry waiters too */
-void CDir::take_waiting(uint64_t mask, list<MDSInternalContextBase*>& ls)
-{
- if ((mask & WAIT_DENTRY) && !waiting_on_dentry.empty()) {
- // take all dentry waiters
- while (!waiting_on_dentry.empty()) {
- compact_map<string_snap_t, list<MDSInternalContextBase*> >::iterator p = waiting_on_dentry.begin();
- dout(10) << "take_waiting dentry " << p->first.name
- << " snap " << p->first.snapid << " on " << *this << dendl;
- ls.splice(ls.end(), p->second);
- waiting_on_dentry.erase(p);
- }
- put(PIN_DNWAITER);
- }
-
- // waiting
- MDSCacheObject::take_waiting(mask, ls);
-}
-
-
-void CDir::finish_waiting(uint64_t mask, int result)
-{
- dout(11) << "finish_waiting mask " << hex << mask << dec << " result " << result << " on " << *this << dendl;
-
- list<MDSInternalContextBase*> finished;
- take_waiting(mask, finished);
- if (result < 0)
- finish_contexts(g_ceph_context, finished, result);
- else
- cache->mds->queue_waiters(finished);
-}
-
-
-
-// dirty/clean
-
-fnode_t *CDir::project_fnode()
-{
- assert(get_version() != 0);
- fnode_t *p = new fnode_t;
- *p = *get_projected_fnode();
- projected_fnode.push_back(p);
-
- if (scrub_infop && scrub_infop->last_scrub_dirty) {
- p->localized_scrub_stamp = scrub_infop->last_local.time;
- p->localized_scrub_version = scrub_infop->last_local.version;
- p->recursive_scrub_stamp = scrub_infop->last_recursive.time;
- p->recursive_scrub_version = scrub_infop->last_recursive.version;
- scrub_infop->last_scrub_dirty = false;
- scrub_maybe_delete_info();
- }
-
- dout(10) << "project_fnode " << p << dendl;
- return p;
-}
-
-void CDir::pop_and_dirty_projected_fnode(LogSegment *ls)
-{
- assert(!projected_fnode.empty());
- dout(15) << "pop_and_dirty_projected_fnode " << projected_fnode.front()
- << " v" << projected_fnode.front()->version << dendl;
- fnode = *projected_fnode.front();
- _mark_dirty(ls);
- delete projected_fnode.front();
- projected_fnode.pop_front();
-}
-
-
-version_t CDir::pre_dirty(version_t min)
-{
- if (min > projected_version)
- projected_version = min;
- ++projected_version;
- dout(10) << "pre_dirty " << projected_version << dendl;
- return projected_version;
-}
-
-void CDir::mark_dirty(version_t pv, LogSegment *ls)
-{
- assert(get_version() < pv);
- assert(pv <= projected_version);
- fnode.version = pv;
- _mark_dirty(ls);
-}
-
-void CDir::_mark_dirty(LogSegment *ls)
-{
- if (!state_test(STATE_DIRTY)) {
- dout(10) << "mark_dirty (was clean) " << *this << " version " << get_version() << dendl;
- _set_dirty_flag();
- assert(ls);
- } else {
- dout(10) << "mark_dirty (already dirty) " << *this << " version " << get_version() << dendl;
- }
- if (ls) {
- ls->dirty_dirfrags.push_back(&item_dirty);
-
- // if i've never committed, i need to be before _any_ mention of me is trimmed from the journal.
- if (committed_version == 0 && !item_new.is_on_list())
- ls->new_dirfrags.push_back(&item_new);
- }
-}
-
-void CDir::mark_new(LogSegment *ls)
-{
- ls->new_dirfrags.push_back(&item_new);
- state_clear(STATE_CREATING);
-
- list<MDSInternalContextBase*> waiters;
- take_waiting(CDir::WAIT_CREATED, waiters);
- cache->mds->queue_waiters(waiters);
-}
-
-void CDir::mark_clean()
-{
- dout(10) << "mark_clean " << *this << " version " << get_version() << dendl;
- if (state_test(STATE_DIRTY)) {
- item_dirty.remove_myself();
- item_new.remove_myself();
-
- state_clear(STATE_DIRTY);
- put(PIN_DIRTY);
- }
-}
-
-// caller should hold auth pin of this
-void CDir::log_mark_dirty()
-{
- if (is_dirty() || is_projected())
- return; // noop if it is already dirty or will be dirty
-
- version_t pv = pre_dirty();
- mark_dirty(pv, cache->mds->mdlog->get_current_segment());
-}
-
-void CDir::mark_complete() {
- state_set(STATE_COMPLETE);
- bloom.reset();
-}
-
-void CDir::first_get()
-{
- inode->get(CInode::PIN_DIRFRAG);
-}
-
-void CDir::last_put()
-{
- inode->put(CInode::PIN_DIRFRAG);
-}
-
-
-
-/******************************************************************************
- * FETCH and COMMIT
- */
-
-// -----------------------
-// FETCH
-void CDir::fetch(MDSInternalContextBase *c, bool ignore_authpinnability)
-{
- string want;
- return fetch(c, want, ignore_authpinnability);
-}
-
-void CDir::fetch(MDSInternalContextBase *c, const string& want_dn, bool ignore_authpinnability)
-{
- dout(10) << "fetch on " << *this << dendl;
-
- assert(is_auth());
- assert(!is_complete());
-
- if (!can_auth_pin() && !ignore_authpinnability) {
- if (c) {
- dout(7) << "fetch waiting for authpinnable" << dendl;
- add_waiter(WAIT_UNFREEZE, c);
- } else
- dout(7) << "fetch not authpinnable and no context" << dendl;
- return;
- }
-
- // unlinked directory inode shouldn't have any entry
- if (!inode->is_base() && get_parent_dir()->inode->is_stray() &&
- !inode->snaprealm) {
- dout(7) << "fetch dirfrag for unlinked directory, mark complete" << dendl;
- if (get_version() == 0) {
- assert(inode->is_auth());
- set_version(1);
-
- if (state_test(STATE_REJOINUNDEF)) {
- assert(cache->mds->is_rejoin());
- state_clear(STATE_REJOINUNDEF);
- cache->opened_undef_dirfrag(this);
- }
- }
- mark_complete();
-
- if (c)
- cache->mds->queue_waiter(c);
- return;
- }
-
- if (c) add_waiter(WAIT_COMPLETE, c);
- if (!want_dn.empty()) wanted_items.insert(want_dn);
-
- // already fetching?
- if (state_test(CDir::STATE_FETCHING)) {
- dout(7) << "already fetching; waiting" << dendl;
- return;
- }
-
- auth_pin(this);
- state_set(CDir::STATE_FETCHING);
-
- if (cache->mds->logger) cache->mds->logger->inc(l_mds_dir_fetch);
-
- std::set<dentry_key_t> empty;
- _omap_fetch(NULL, empty);
-}
-
-void CDir::fetch(MDSInternalContextBase *c, const std::set<dentry_key_t>& keys)
-{
- dout(10) << "fetch " << keys.size() << " keys on " << *this << dendl;
-
- assert(is_auth());
- assert(!is_complete());
-
- if (!can_auth_pin()) {
- dout(7) << "fetch keys waiting for authpinnable" << dendl;
- add_waiter(WAIT_UNFREEZE, c);
- return;
- }
- if (state_test(CDir::STATE_FETCHING)) {
- dout(7) << "fetch keys waiting for full fetch" << dendl;
- add_waiter(WAIT_COMPLETE, c);
- return;
- }
-
- auth_pin(this);
- if (cache->mds->logger) cache->mds->logger->inc(l_mds_dir_fetch);
-
- _omap_fetch(c, keys);
-}
-
-class C_IO_Dir_OMAP_FetchedMore : public CDirIOContext {
- MDSInternalContextBase *fin;
-public:
- bufferlist hdrbl;
- bool more = false;
- map<string, bufferlist> omap; ///< carry-over from before
- map<string, bufferlist> omap_more; ///< new batch
- int ret;
- C_IO_Dir_OMAP_FetchedMore(CDir *d, MDSInternalContextBase *f) :
- CDirIOContext(d), fin(f), ret(0) { }
- void finish(int r) {
- // merge results
- if (omap.empty()) {
- omap.swap(omap_more);
- } else {
- omap.insert(omap_more.begin(), omap_more.end());
- }
- if (more) {
- dir->_omap_fetch_more(hdrbl, omap, fin);
- } else {
- dir->_omap_fetched(hdrbl, omap, !fin, r);
- if (fin)
- fin->complete(r);
- }
- }
-};
-
-class C_IO_Dir_OMAP_Fetched : public CDirIOContext {
- MDSInternalContextBase *fin;
-public:
- bufferlist hdrbl;
- bool more = false;
- map<string, bufferlist> omap;
- bufferlist btbl;
- int ret1, ret2, ret3;
-
- C_IO_Dir_OMAP_Fetched(CDir *d, MDSInternalContextBase *f) :
- CDirIOContext(d), fin(f), ret1(0), ret2(0), ret3(0) { }
- void finish(int r) override {
- // check the correctness of backtrace
- if (r >= 0 && ret3 != -ECANCELED)
- dir->inode->verify_diri_backtrace(btbl, ret3);
- if (r >= 0) r = ret1;
- if (r >= 0) r = ret2;
- if (more) {
- dir->_omap_fetch_more(hdrbl, omap, fin);
- } else {
- dir->_omap_fetched(hdrbl, omap, !fin, r);
- if (fin)
- fin->complete(r);
- }
- }
-};
-
-void CDir::_omap_fetch(MDSInternalContextBase *c, const std::set<dentry_key_t>& keys)
-{
- C_IO_Dir_OMAP_Fetched *fin = new C_IO_Dir_OMAP_Fetched(this, c);
- object_t oid = get_ondisk_object();
- object_locator_t oloc(cache->mds->mdsmap->get_metadata_pool());
- ObjectOperation rd;
- rd.omap_get_header(&fin->hdrbl, &fin->ret1);
- if (keys.empty()) {
- assert(!c);
- rd.omap_get_vals("", "", g_conf->mds_dir_keys_per_op,
- &fin->omap, &fin->more, &fin->ret2);
- } else {
- assert(c);
- std::set<std::string> str_keys;
- for (auto p = keys.begin(); p != keys.end(); ++p) {
- string str;
- p->encode(str);
- str_keys.insert(str);
- }
- rd.omap_get_vals_by_keys(str_keys, &fin->omap, &fin->ret2);
- }
- // check the correctness of backtrace
- if (g_conf->mds_verify_backtrace > 0 && frag == frag_t()) {
- rd.getxattr("parent", &fin->btbl, &fin->ret3);
- rd.set_last_op_flags(CEPH_OSD_OP_FLAG_FAILOK);
- } else {
- fin->ret3 = -ECANCELED;
- }
-
- cache->mds->objecter->read(oid, oloc, rd, CEPH_NOSNAP, NULL, 0,
- new C_OnFinisher(fin, cache->mds->finisher));
-}
-
-void CDir::_omap_fetch_more(
- bufferlist& hdrbl,
- map<string, bufferlist>& omap,
- MDSInternalContextBase *c)
-{
- // we have more omap keys to fetch!
- object_t oid = get_ondisk_object();
- object_locator_t oloc(cache->mds->mdsmap->get_metadata_pool());
- C_IO_Dir_OMAP_FetchedMore *fin = new C_IO_Dir_OMAP_FetchedMore(this, c);
- fin->hdrbl.claim(hdrbl);
- fin->omap.swap(omap);
- ObjectOperation rd;
- rd.omap_get_vals(fin->omap.rbegin()->first,
- "", /* filter prefix */
- g_conf->mds_dir_keys_per_op,
- &fin->omap_more,
- &fin->more,
- &fin->ret);
- cache->mds->objecter->read(oid, oloc, rd, CEPH_NOSNAP, NULL, 0,
- new C_OnFinisher(fin, cache->mds->finisher));
-}
-
-CDentry *CDir::_load_dentry(
- const std::string &key,
- const std::string &dname,
- const snapid_t last,
- bufferlist &bl,
- const int pos,
- const std::set<snapid_t> *snaps,
- bool *force_dirty,
- list<CInode*> *undef_inodes)
-{
- bufferlist::iterator q = bl.begin();
-
- snapid_t first;
- ::decode(first, q);
-
- // marker
- char type;
- ::decode(type, q);
-
- dout(20) << "_fetched pos " << pos << " marker '" << type << "' dname '" << dname
- << " [" << first << "," << last << "]"
- << dendl;
-
- bool stale = false;
- if (snaps && last != CEPH_NOSNAP) {
- set<snapid_t>::const_iterator p = snaps->lower_bound(first);
- if (p == snaps->end() || *p > last) {
- dout(10) << " skipping stale dentry on [" << first << "," << last << "]" << dendl;
- stale = true;
- }
- }
-
- /*
- * look for existing dentry for _last_ snap, because unlink +
- * create may leave a "hole" (epochs during which the dentry
- * doesn't exist) but for which no explicit negative dentry is in
- * the cache.
- */
- CDentry *dn;
- if (stale)
- dn = lookup_exact_snap(dname, last);
- else
- dn = lookup(dname, last);
-
- if (type == 'L') {
- // hard link
- inodeno_t ino;
- unsigned char d_type;
- ::decode(ino, q);
- ::decode(d_type, q);
-
- if (stale) {
- if (!dn) {
- stale_items.insert(key);
- *force_dirty = true;
- }
- return dn;
- }
-
- if (dn) {
- if (dn->get_linkage()->get_inode() == 0) {
- dout(12) << "_fetched had NEG dentry " << *dn << dendl;
- } else {
- dout(12) << "_fetched had dentry " << *dn << dendl;
- }
- } else {
- // (remote) link
- dn = add_remote_dentry(dname, ino, d_type, first, last);
-
- // link to inode?
- CInode *in = cache->get_inode(ino); // we may or may not have it.
- if (in) {
- dn->link_remote(dn->get_linkage(), in);
- dout(12) << "_fetched got remote link " << ino << " which we have " << *in << dendl;
- } else {
- dout(12) << "_fetched got remote link " << ino << " (dont' have it)" << dendl;
- }
- }
- }
- else if (type == 'I') {
- // inode
-
- // Load inode data before looking up or constructing CInode
- InodeStore inode_data;
- inode_data.decode_bare(q);
-
- if (stale) {
- if (!dn) {
- stale_items.insert(key);
- *force_dirty = true;
- }
- return dn;
- }
-
- bool undef_inode = false;
- if (dn) {
- CInode *in = dn->get_linkage()->get_inode();
- if (in) {
- dout(12) << "_fetched had dentry " << *dn << dendl;
- if (in->state_test(CInode::STATE_REJOINUNDEF)) {
- undef_inodes->push_back(in);
- undef_inode = true;
- }
- } else
- dout(12) << "_fetched had NEG dentry " << *dn << dendl;
- }
-
- if (!dn || undef_inode) {
- // add inode
- CInode *in = cache->get_inode(inode_data.inode.ino, last);
- if (!in || undef_inode) {
- if (undef_inode && in)
- in->first = first;
- else
- in = new CInode(cache, true, first, last);
-
- in->inode = inode_data.inode;
- // symlink?
- if (in->is_symlink())
- in->symlink = inode_data.symlink;
-
- in->dirfragtree.swap(inode_data.dirfragtree);
- in->xattrs.swap(inode_data.xattrs);
- in->old_inodes.swap(inode_data.old_inodes);
- if (!in->old_inodes.empty()) {
- snapid_t min_first = in->old_inodes.rbegin()->first + 1;
- if (min_first > in->first)
- in->first = min_first;
- }
-
- in->oldest_snap = inode_data.oldest_snap;
- in->decode_snap_blob(inode_data.snap_blob);
- if (snaps && !in->snaprealm)
- in->purge_stale_snap_data(*snaps);
-
- if (!undef_inode) {
- cache->add_inode(in); // add
- dn = add_primary_dentry(dname, in, first, last); // link
- }
- dout(12) << "_fetched got " << *dn << " " << *in << dendl;
-
- if (in->inode.is_dirty_rstat())
- in->mark_dirty_rstat();
-
- //in->hack_accessed = false;
- //in->hack_load_stamp = ceph_clock_now();
- //num_new_inodes_loaded++;
- } else {
- dout(0) << "_fetched badness: got (but i already had) " << *in
- << " mode " << in->inode.mode
- << " mtime " << in->inode.mtime << dendl;
- string dirpath, inopath;
- this->inode->make_path_string(dirpath);
- in->make_path_string(inopath);
- cache->mds->clog->error() << "loaded dup inode " << inode_data.inode.ino
- << " [" << first << "," << last << "] v" << inode_data.inode.version
- << " at " << dirpath << "/" << dname
- << ", but inode " << in->vino() << " v" << in->inode.version
- << " already exists at " << inopath;
- return dn;
- }
- }
- } else {
- std::ostringstream oss;
- oss << "Invalid tag char '" << type << "' pos " << pos;
- throw buffer::malformed_input(oss.str());
- }
-
- return dn;
-}
-
-void CDir::_omap_fetched(bufferlist& hdrbl, map<string, bufferlist>& omap,
- bool complete, int r)
-{
- LogChannelRef clog = cache->mds->clog;
- dout(10) << "_fetched header " << hdrbl.length() << " bytes "
- << omap.size() << " keys for " << *this << dendl;
-
- assert(r == 0 || r == -ENOENT || r == -ENODATA);
- assert(is_auth());
- assert(!is_frozen());
-
- if (hdrbl.length() == 0) {
- dout(0) << "_fetched missing object for " << *this << dendl;
-
- clog->error() << "dir " << dirfrag() << " object missing on disk; some "
- "files may be lost (" << get_path() << ")";
-
- go_bad(complete);
- return;
- }
-
- fnode_t got_fnode;
- {
- bufferlist::iterator p = hdrbl.begin();
- try {
- ::decode(got_fnode, p);
- } catch (const buffer::error &err) {
- derr << "Corrupt fnode in dirfrag " << dirfrag()
- << ": " << err << dendl;
- clog->warn() << "Corrupt fnode header in " << dirfrag() << ": "
- << err << " (" << get_path() << ")";
- go_bad(complete);
- return;
- }
- if (!p.end()) {
- clog->warn() << "header buffer of dir " << dirfrag() << " has "
- << hdrbl.length() - p.get_off() << " extra bytes ("
- << get_path() << ")";
- go_bad(complete);
- return;
- }
- }
-
- dout(10) << "_fetched version " << got_fnode.version << dendl;
-
- // take the loaded fnode?
- // only if we are a fresh CDir* with no prior state.
- if (get_version() == 0) {
- assert(!is_projected());
- assert(!state_test(STATE_COMMITTING));
- fnode = got_fnode;
- projected_version = committing_version = committed_version = got_fnode.version;
-
- if (state_test(STATE_REJOINUNDEF)) {
- assert(cache->mds->is_rejoin());
- state_clear(STATE_REJOINUNDEF);
- cache->opened_undef_dirfrag(this);
- }
- }
-
- list<CInode*> undef_inodes;
-
- // purge stale snaps?
- // only if we have past_parents open!
- bool force_dirty = false;
- const set<snapid_t> *snaps = NULL;
- SnapRealm *realm = inode->find_snaprealm();
- if (!realm->have_past_parents_open()) {
- dout(10) << " no snap purge, one or more past parents NOT open" << dendl;
- } else if (fnode.snap_purged_thru < realm->get_last_destroyed()) {
- snaps = &realm->get_snaps();
- dout(10) << " snap_purged_thru " << fnode.snap_purged_thru
- << " < " << realm->get_last_destroyed()
- << ", snap purge based on " << *snaps << dendl;
- if (get_num_snap_items() == 0) {
- fnode.snap_purged_thru = realm->get_last_destroyed();
- force_dirty = true;
- }
- }
-
- unsigned pos = omap.size() - 1;
- for (map<string, bufferlist>::reverse_iterator p = omap.rbegin();
- p != omap.rend();
- ++p, --pos) {
- string dname;
- snapid_t last;
- dentry_key_t::decode_helper(p->first, dname, last);
-
- CDentry *dn = NULL;
- try {
- dn = _load_dentry(
- p->first, dname, last, p->second, pos, snaps,
- &force_dirty, &undef_inodes);
- } catch (const buffer::error &err) {
- cache->mds->clog->warn() << "Corrupt dentry '" << dname << "' in "
- "dir frag " << dirfrag() << ": "
- << err << "(" << get_path() << ")";
-
- // Remember that this dentry is damaged. Subsequent operations
- // that try to act directly on it will get their EIOs, but this
- // dirfrag as a whole will continue to look okay (minus the
- // mysteriously-missing dentry)
- go_bad_dentry(last, dname);
-
- // Anyone who was WAIT_DENTRY for this guy will get kicked
- // to RetryRequest, and hit the DamageTable-interrogating path.
- // Stats will now be bogus because we will think we're complete,
- // but have 1 or more missing dentries.
- continue;
- }
-
- if (dn && (wanted_items.count(dname) > 0 || !complete)) {
- dout(10) << " touching wanted dn " << *dn << dendl;
- inode->mdcache->touch_dentry(dn);
- }
-
- /** clean underwater item?
- * Underwater item is something that is dirty in our cache from
- * journal replay, but was previously flushed to disk before the
- * mds failed.
- *
- * We only do this is committed_version == 0. that implies either
- * - this is a fetch after from a clean/empty CDir is created
- * (and has no effect, since the dn won't exist); or
- * - this is a fetch after _recovery_, which is what we're worried
- * about. Items that are marked dirty from the journal should be
- * marked clean if they appear on disk.
- */
- if (committed_version == 0 &&
- dn &&
- dn->get_version() <= got_fnode.version &&
- dn->is_dirty()) {
- dout(10) << "_fetched had underwater dentry " << *dn << ", marking clean" << dendl;
- dn->mark_clean();
-
- if (dn->get_linkage()->is_primary()) {
- assert(dn->get_linkage()->get_inode()->get_version() <= got_fnode.version);
- dout(10) << "_fetched had underwater inode " << *dn->get_linkage()->get_inode() << ", marking clean" << dendl;
- dn->get_linkage()->get_inode()->mark_clean();
- }
- }
- }
-
- //cache->mds->logger->inc("newin", num_new_inodes_loaded);
-
- // mark complete, !fetching
- if (complete) {
- wanted_items.clear();
- mark_complete();
- state_clear(STATE_FETCHING);
-
- if (scrub_infop && scrub_infop->need_scrub_local) {
- scrub_infop->need_scrub_local = false;
- scrub_local();
- }
- }
-
- // open & force frags
- while (!undef_inodes.empty()) {
- CInode *in = undef_inodes.front();
- undef_inodes.pop_front();
- in->state_clear(CInode::STATE_REJOINUNDEF);
- cache->opened_undef_inode(in);
- }
-
- // dirty myself to remove stale snap dentries
- if (force_dirty && !inode->mdcache->is_readonly())
- log_mark_dirty();
-
- auth_unpin(this);
-
- if (complete) {
- // kick waiters
- finish_waiting(WAIT_COMPLETE, 0);
- }
-}
-
-void CDir::_go_bad()
-{
- if (get_version() == 0)
- set_version(1);
- state_set(STATE_BADFRAG);
- // mark complete, !fetching
- mark_complete();
- state_clear(STATE_FETCHING);
- auth_unpin(this);
-
- // kick waiters
- finish_waiting(WAIT_COMPLETE, -EIO);
-}
-
-void CDir::go_bad_dentry(snapid_t last, const std::string &dname)
-{
- dout(10) << "go_bad_dentry " << dname << dendl;
- const bool fatal = cache->mds->damage_table.notify_dentry(
- inode->ino(), frag, last, dname, get_path() + "/" + dname);
- if (fatal) {
- cache->mds->damaged();
- ceph_abort(); // unreachable, damaged() respawns us
- }
-}
-
-void CDir::go_bad(bool complete)
-{
- dout(10) << "go_bad " << frag << dendl;
- const bool fatal = cache->mds->damage_table.notify_dirfrag(
- inode->ino(), frag, get_path());
- if (fatal) {
- cache->mds->damaged();
- ceph_abort(); // unreachable, damaged() respawns us
- }
-
- if (complete)
- _go_bad();
- else
- auth_unpin(this);
-}
-
-// -----------------------
-// COMMIT
-
-/**
- * commit
- *
- * @param want - min version i want committed
- * @param c - callback for completion
- */
-void CDir::commit(version_t want, MDSInternalContextBase *c, bool ignore_authpinnability, int op_prio)
-{
- dout(10) << "commit want " << want << " on " << *this << dendl;
- if (want == 0) want = get_version();
-
- // preconditions
- assert(want <= get_version() || get_version() == 0); // can't commit the future
- assert(want > committed_version); // the caller is stupid
- assert(is_auth());
- assert(ignore_authpinnability || can_auth_pin());
-
- // note: queue up a noop if necessary, so that we always
- // get an auth_pin.
- if (!c)
- c = new C_MDSInternalNoop;
-
- // auth_pin on first waiter
- if (waiting_for_commit.empty())
- auth_pin(this);
- waiting_for_commit[want].push_back(c);
-
- // ok.
- _commit(want, op_prio);
-}
-
-class C_IO_Dir_Committed : public CDirIOContext {
- version_t version;
-public:
- C_IO_Dir_Committed(CDir *d, version_t v) : CDirIOContext(d), version(v) { }
- void finish(int r) override {
- dir->_committed(r, version);
- }
-};
-
-/**
- * Flush out the modified dentries in this dir. Keep the bufferlist
- * below max_write_size;
- */
-void CDir::_omap_commit(int op_prio)
-{
- dout(10) << "_omap_commit" << dendl;
-
- unsigned max_write_size = cache->max_dir_commit_size;
- unsigned write_size = 0;
-
- if (op_prio < 0)
- op_prio = CEPH_MSG_PRIO_DEFAULT;
-
- // snap purge?
- const set<snapid_t> *snaps = NULL;
- SnapRealm *realm = inode->find_snaprealm();
- if (!realm->have_past_parents_open()) {
- dout(10) << " no snap purge, one or more past parents NOT open" << dendl;
- } else if (fnode.snap_purged_thru < realm->get_last_destroyed()) {
- snaps = &realm->get_snaps();
- dout(10) << " snap_purged_thru " << fnode.snap_purged_thru
- << " < " << realm->get_last_destroyed()
- << ", snap purge based on " << *snaps << dendl;
- // fnode.snap_purged_thru = realm->get_last_destroyed();
- }
-
- set<string> to_remove;
- map<string, bufferlist> to_set;
-
- C_GatherBuilder gather(g_ceph_context,
- new C_OnFinisher(new C_IO_Dir_Committed(this,
- get_version()),
- cache->mds->finisher));
-
- SnapContext snapc;
- object_t oid = get_ondisk_object();
- object_locator_t oloc(cache->mds->mdsmap->get_metadata_pool());
-
- if (!stale_items.empty()) {
- for (compact_set<string>::iterator p = stale_items.begin();
- p != stale_items.end();
- ++p) {
- to_remove.insert(*p);
- write_size += (*p).length();
- }
- stale_items.clear();
- }
-
- for (map_t::iterator p = items.begin();
- p != items.end(); ) {
- CDentry *dn = p->second;
- ++p;
-
- string key;
- dn->key().encode(key);
-
- if (dn->last != CEPH_NOSNAP &&
- snaps && try_trim_snap_dentry(dn, *snaps)) {
- dout(10) << " rm " << key << dendl;
- write_size += key.length();
- to_remove.insert(key);
- continue;
- }
-
- if (!dn->is_dirty() &&
- (!dn->state_test(CDentry::STATE_FRAGMENTING) || dn->get_linkage()->is_null()))
- continue; // skip clean dentries
-
- if (dn->get_linkage()->is_null()) {
- dout(10) << " rm " << dn->name << " " << *dn << dendl;
- write_size += key.length();
- to_remove.insert(key);
- } else {
- dout(10) << " set " << dn->name << " " << *dn << dendl;
- bufferlist dnbl;
- _encode_dentry(dn, dnbl, snaps);
- write_size += key.length() + dnbl.length();
- to_set[key].swap(dnbl);
- }
-
- if (write_size >= max_write_size) {
- ObjectOperation op;
- op.priority = op_prio;
-
- // don't create new dirfrag blindly
- if (!is_new() && !state_test(CDir::STATE_FRAGMENTING))
- op.stat(NULL, (ceph::real_time*) NULL, NULL);
-
- if (!to_set.empty())
- op.omap_set(to_set);
- if (!to_remove.empty())
- op.omap_rm_keys(to_remove);
-
- cache->mds->objecter->mutate(oid, oloc, op, snapc,
- ceph::real_clock::now(),
- 0, gather.new_sub());
-
- write_size = 0;
- to_set.clear();
- to_remove.clear();
- }
- }
-
- ObjectOperation op;
- op.priority = op_prio;
-
- // don't create new dirfrag blindly
- if (!is_new() && !state_test(CDir::STATE_FRAGMENTING))
- op.stat(NULL, (ceph::real_time*)NULL, NULL);
-
- /*
- * save the header at the last moment.. If we were to send it off before other
- * updates, but die before sending them all, we'd think that the on-disk state
- * was fully committed even though it wasn't! However, since the messages are
- * strictly ordered between the MDS and the OSD, and since messages to a given
- * PG are strictly ordered, if we simply send the message containing the header
- * off last, we cannot get our header into an incorrect state.
- */
- bufferlist header;
- ::encode(fnode, header);
- op.omap_set_header(header);
-
- if (!to_set.empty())
- op.omap_set(to_set);
- if (!to_remove.empty())
- op.omap_rm_keys(to_remove);
-
- cache->mds->objecter->mutate(oid, oloc, op, snapc,
- ceph::real_clock::now(),
- 0, gather.new_sub());
-
- gather.activate();
-}
-
-void CDir::_encode_dentry(CDentry *dn, bufferlist& bl,
- const set<snapid_t> *snaps)
-{
- // clear dentry NEW flag, if any. we can no longer silently drop it.
- dn->clear_new();
-
- ::encode(dn->first, bl);
-
- // primary or remote?
- if (dn->linkage.is_remote()) {
- inodeno_t ino = dn->linkage.get_remote_ino();
- unsigned char d_type = dn->linkage.get_remote_d_type();
- dout(14) << " pos " << bl.length() << " dn '" << dn->name << "' remote ino " << ino << dendl;
-
- // marker, name, ino
- bl.append('L'); // remote link
- ::encode(ino, bl);
- ::encode(d_type, bl);
- } else if (dn->linkage.is_primary()) {
- // primary link
- CInode *in = dn->linkage.get_inode();
- assert(in);
-
- dout(14) << " pos " << bl.length() << " dn '" << dn->name << "' inode " << *in << dendl;
-
- // marker, name, inode, [symlink string]
- bl.append('I'); // inode
-
- if (in->is_multiversion()) {
- if (!in->snaprealm) {
- if (snaps)
- in->purge_stale_snap_data(*snaps);
- } else if (in->snaprealm->have_past_parents_open()) {
- in->purge_stale_snap_data(in->snaprealm->get_snaps());
- }
- }
-
- bufferlist snap_blob;
- in->encode_snap_blob(snap_blob);
- in->encode_bare(bl, cache->mds->mdsmap->get_up_features(), &snap_blob);
- } else {
- assert(!dn->linkage.is_null());
- }
-}
-
-void CDir::_commit(version_t want, int op_prio)
-{
- dout(10) << "_commit want " << want << " on " << *this << dendl;
-
- // we can't commit things in the future.
- // (even the projected future.)
- assert(want <= get_version() || get_version() == 0);
-
- // check pre+postconditions.
- assert(is_auth());
-
- // already committed?
- if (committed_version >= want) {
- dout(10) << "already committed " << committed_version << " >= " << want << dendl;
- return;
- }
- // already committing >= want?
- if (committing_version >= want) {
- dout(10) << "already committing " << committing_version << " >= " << want << dendl;
- assert(state_test(STATE_COMMITTING));
- return;
- }
-
- // alrady committed an older version?
- if (committing_version > committed_version) {
- dout(10) << "already committing older " << committing_version << ", waiting for that to finish" << dendl;
- return;
- }
-
- // commit.
- committing_version = get_version();
-
- // mark committing (if not already)
- if (!state_test(STATE_COMMITTING)) {
- dout(10) << "marking committing" << dendl;
- state_set(STATE_COMMITTING);
- }
-
- if (cache->mds->logger) cache->mds->logger->inc(l_mds_dir_commit);
-
- _omap_commit(op_prio);
-}
-
-
-/**
- * _committed
- *
- * @param v version i just committed
- */
-void CDir::_committed(int r, version_t v)
-{
- if (r < 0) {
- // the directory could be partly purged during MDS failover
- if (r == -ENOENT && committed_version == 0 &&
- !inode->is_base() && get_parent_dir()->inode->is_stray()) {
- r = 0;
- if (inode->snaprealm)
- inode->state_set(CInode::STATE_MISSINGOBJS);
- }
- if (r < 0) {
- dout(1) << "commit error " << r << " v " << v << dendl;
- cache->mds->clog->error() << "failed to commit dir " << dirfrag() << " object,"
- << " errno " << r;
- cache->mds->handle_write_error(r);
- return;
- }
- }
-
- dout(10) << "_committed v " << v << " on " << *this << dendl;
- assert(is_auth());
-
- bool stray = inode->is_stray();
-
- // take note.
- assert(v > committed_version);
- assert(v <= committing_version);
- committed_version = v;
-
- // _all_ commits done?
- if (committing_version == committed_version)
- state_clear(CDir::STATE_COMMITTING);
-
- // _any_ commit, even if we've been redirtied, means we're no longer new.
- item_new.remove_myself();
-
- // dir clean?
- if (committed_version == get_version())
- mark_clean();
-
- // dentries clean?
- for (map_t::iterator it = items.begin();
- it != items.end(); ) {
- CDentry *dn = it->second;
- ++it;
-
- // inode?
- if (dn->linkage.is_primary()) {
- CInode *in = dn->linkage.get_inode();
- assert(in);
- assert(in->is_auth());
-
- if (committed_version >= in->get_version()) {
- if (in->is_dirty()) {
- dout(15) << " dir " << committed_version << " >= inode " << in->get_version() << " now clean " << *in << dendl;
- in->mark_clean();
- }
- } else {
- dout(15) << " dir " << committed_version << " < inode " << in->get_version() << " still dirty " << *in << dendl;
- assert(in->is_dirty() || in->last < CEPH_NOSNAP); // special case for cow snap items (not predirtied)
- }
- }
-
- // dentry
- if (committed_version >= dn->get_version()) {
- if (dn->is_dirty()) {
- dout(15) << " dir " << committed_version << " >= dn " << dn->get_version() << " now clean " << *dn << dendl;
- dn->mark_clean();
-
- // drop clean null stray dentries immediately
- if (stray &&
- dn->get_num_ref() == 0 &&
- !dn->is_projected() &&
- dn->get_linkage()->is_null())
- remove_dentry(dn);
- }
- } else {
- dout(15) << " dir " << committed_version << " < dn " << dn->get_version() << " still dirty " << *dn << dendl;
- }
- }
-
- // finishers?
- bool were_waiters = !waiting_for_commit.empty();
-
- compact_map<version_t, list<MDSInternalContextBase*> >::iterator p = waiting_for_commit.begin();
- while (p != waiting_for_commit.end()) {
- compact_map<version_t, list<MDSInternalContextBase*> >::iterator n = p;
- ++n;
- if (p->first > committed_version) {
- dout(10) << " there are waiters for " << p->first << ", committing again" << dendl;
- _commit(p->first, -1);
- break;
- }
- cache->mds->queue_waiters(p->second);
- waiting_for_commit.erase(p);
- p = n;
- }
-
- // try drop dentries in this dirfrag if it's about to be purged
- if (!inode->is_base() && get_parent_dir()->inode->is_stray() &&
- inode->snaprealm)
- cache->maybe_eval_stray(inode, true);
-
- // unpin if we kicked the last waiter.
- if (were_waiters &&
- waiting_for_commit.empty())
- auth_unpin(this);
-}
-
-
-
-
-// IMPORT/EXPORT
-
-void CDir::encode_export(bufferlist& bl)
-{
- assert(!is_projected());
- ::encode(first, bl);
- ::encode(fnode, bl);
- ::encode(dirty_old_rstat, bl);
- ::encode(committed_version, bl);
-
- ::encode(state, bl);
- ::encode(dir_rep, bl);
-
- ::encode(pop_me, bl);
- ::encode(pop_auth_subtree, bl);
-
- ::encode(dir_rep_by, bl);
- ::encode(get_replicas(), bl);
-
- get(PIN_TEMPEXPORTING);
-}
-
-void CDir::finish_export(utime_t now)
-{
- state &= MASK_STATE_EXPORT_KEPT;
- pop_auth_subtree_nested.sub(now, cache->decayrate, pop_auth_subtree);
- pop_me.zero(now);
- pop_auth_subtree.zero(now);
- put(PIN_TEMPEXPORTING);
- dirty_old_rstat.clear();
-}
-
-void CDir::decode_import(bufferlist::iterator& blp, utime_t now, LogSegment *ls)
-{
- ::decode(first, blp);
- ::decode(fnode, blp);
- ::decode(dirty_old_rstat, blp);
- projected_version = fnode.version;
- ::decode(committed_version, blp);
- committing_version = committed_version;
-
- unsigned s;
- ::decode(s, blp);
- state &= MASK_STATE_IMPORT_KEPT;
- state_set(STATE_AUTH | (s & MASK_STATE_EXPORTED));
-
- if (is_dirty()) {
- get(PIN_DIRTY);
- _mark_dirty(ls);
- }
-
- ::decode(dir_rep, blp);
-
- ::decode(pop_me, now, blp);
- ::decode(pop_auth_subtree, now, blp);
- pop_auth_subtree_nested.add(now, cache->decayrate, pop_auth_subtree);
-
- ::decode(dir_rep_by, blp);
- ::decode(get_replicas(), blp);
- if (is_replicated()) get(PIN_REPLICATED);
-
- replica_nonce = 0; // no longer defined
-
- // did we import some dirty scatterlock data?
- if (dirty_old_rstat.size() ||
- !(fnode.rstat == fnode.accounted_rstat)) {
- cache->mds->locker->mark_updated_scatterlock(&inode->nestlock);
- ls->dirty_dirfrag_nest.push_back(&inode->item_dirty_dirfrag_nest);
- }
- if (!(fnode.fragstat == fnode.accounted_fragstat)) {
- cache->mds->locker->mark_updated_scatterlock(&inode->filelock);
- ls->dirty_dirfrag_dir.push_back(&inode->item_dirty_dirfrag_dir);
- }
- if (is_dirty_dft()) {
- if (inode->dirfragtreelock.get_state() != LOCK_MIX &&
- inode->dirfragtreelock.is_stable()) {
- // clear stale dirtydft
- state_clear(STATE_DIRTYDFT);
- } else {
- cache->mds->locker->mark_updated_scatterlock(&inode->dirfragtreelock);
- ls->dirty_dirfrag_dirfragtree.push_back(&inode->item_dirty_dirfrag_dirfragtree);
- }
- }
-}
-
-
-
-
-/********************************
- * AUTHORITY
- */
-
-/*
- * if dir_auth.first == parent, auth is same as inode.
- * unless .second != unknown, in which case that sticks.
- */
-mds_authority_t CDir::authority() const
-{
- if (is_subtree_root())
- return dir_auth;
- else
- return inode->authority();
-}
-
-/** is_subtree_root()
- * true if this is an auth delegation point.
- * that is, dir_auth != default (parent,unknown)
- *
- * some key observations:
- * if i am auth:
- * - any region bound will be an export, or frozen.
- *
- * note that this DOES heed dir_auth.pending
- */
-/*
-bool CDir::is_subtree_root()
-{
- if (dir_auth == CDIR_AUTH_DEFAULT) {
- //dout(10) << "is_subtree_root false " << dir_auth << " != " << CDIR_AUTH_DEFAULT
- //<< " on " << ino() << dendl;
- return false;
- } else {
- //dout(10) << "is_subtree_root true " << dir_auth << " != " << CDIR_AUTH_DEFAULT
- //<< " on " << ino() << dendl;
- return true;
- }
-}
-*/
-
-/** contains(x)
- * true if we are x, or an ancestor of x
- */
-bool CDir::contains(CDir *x)
-{
- while (1) {
- if (x == this)
- return true;
- x = x->get_inode()->get_projected_parent_dir();
- if (x == 0)
- return false;
- }
-}
-
-
-
-/** set_dir_auth
- */
-void CDir::set_dir_auth(mds_authority_t a)
-{
- dout(10) << "setting dir_auth=" << a
- << " from " << dir_auth
- << " on " << *this << dendl;
-
- bool was_subtree = is_subtree_root();
- bool was_ambiguous = dir_auth.second >= 0;
-
- // set it.
- dir_auth = a;
-
- // new subtree root?
- if (!was_subtree && is_subtree_root()) {
- dout(10) << " new subtree root, adjusting auth_pins" << dendl;
-
- // adjust nested auth pins
- if (get_cum_auth_pins())
- inode->adjust_nested_auth_pins(-1, NULL);
-
- // unpin parent of frozen dir/tree?
- if (inode->is_auth()) {
- assert(!is_frozen_tree_root());
- if (is_frozen_dir())
- inode->auth_unpin(this);
- }
- }
- if (was_subtree && !is_subtree_root()) {
- dout(10) << " old subtree root, adjusting auth_pins" << dendl;
-
- // adjust nested auth pins
- if (get_cum_auth_pins())
- inode->adjust_nested_auth_pins(1, NULL);
-
- // pin parent of frozen dir/tree?
- if (inode->is_auth()) {
- assert(!is_frozen_tree_root());
- if (is_frozen_dir())
- inode->auth_pin(this);
- }
- }
-
- // newly single auth?
- if (was_ambiguous && dir_auth.second == CDIR_AUTH_UNKNOWN) {
- list<MDSInternalContextBase*> ls;
- take_waiting(WAIT_SINGLEAUTH, ls);
- cache->mds->queue_waiters(ls);
- }
-}
-
-
-/*****************************************
- * AUTH PINS and FREEZING
- *
- * the basic plan is that auth_pins only exist in auth regions, and they
- * prevent a freeze (and subsequent auth change).
- *
- * however, we also need to prevent a parent from freezing if a child is frozen.
- * for that reason, the parent inode of a frozen directory is auth_pinned.
- *
- * the oddity is when the frozen directory is a subtree root. if that's the case,
- * the parent inode isn't frozen. which means that when subtree authority is adjusted
- * at the bounds, inodes for any frozen bound directories need to get auth_pins at that
- * time.
- *
- */
-
-void CDir::auth_pin(void *by)
-{
- if (auth_pins == 0)
- get(PIN_AUTHPIN);
- auth_pins++;
-
-#ifdef MDS_AUTHPIN_SET
- auth_pin_set.insert(by);
-#endif
-
- dout(10) << "auth_pin by " << by
- << " on " << *this
- << " count now " << auth_pins << " + " << nested_auth_pins << dendl;
-
- // nest pins?
- if (!is_subtree_root() &&
- get_cum_auth_pins() == 1)
- inode->adjust_nested_auth_pins(1, by);
-}
-
-void CDir::auth_unpin(void *by)
-{
- auth_pins--;
-
-#ifdef MDS_AUTHPIN_SET
- assert(auth_pin_set.count(by));
- auth_pin_set.erase(auth_pin_set.find(by));
-#endif
- if (auth_pins == 0)
- put(PIN_AUTHPIN);
-
- dout(10) << "auth_unpin by " << by
- << " on " << *this
- << " count now " << auth_pins << " + " << nested_auth_pins << dendl;
- assert(auth_pins >= 0);
-
- int newcum = get_cum_auth_pins();
-
- maybe_finish_freeze(); // pending freeze?
-
- // nest?
- if (!is_subtree_root() &&
- newcum == 0)
- inode->adjust_nested_auth_pins(-1, by);
-}
-
-void CDir::adjust_nested_auth_pins(int inc, int dirinc, void *by)
-{
- assert(inc);
- nested_auth_pins += inc;
- dir_auth_pins += dirinc;
-
- dout(15) << "adjust_nested_auth_pins " << inc << "/" << dirinc << " on " << *this
- << " by " << by << " count now "
- << auth_pins << " + " << nested_auth_pins << dendl;
- assert(nested_auth_pins >= 0);
- assert(dir_auth_pins >= 0);
-
- int newcum = get_cum_auth_pins();
-
- maybe_finish_freeze(); // pending freeze?
-
- // nest?
- if (!is_subtree_root()) {
- if (newcum == 0)
- inode->adjust_nested_auth_pins(-1, by);
- else if (newcum == inc)
- inode->adjust_nested_auth_pins(1, by);
- }
-}
-
-#ifdef MDS_VERIFY_FRAGSTAT
-void CDir::verify_fragstat()
-{
- assert(is_complete());
- if (inode->is_stray())
- return;
-
- frag_info_t c;
- memset(&c, 0, sizeof(c));
-
- for (map_t::iterator it = items.begin();
- it != items.end();
- ++it) {
- CDentry *dn = it->second;
- if (dn->is_null())
- continue;
-
- dout(10) << " " << *dn << dendl;
- if (dn->is_primary())
- dout(10) << " " << *dn->inode << dendl;
-
- if (dn->is_primary()) {
- if (dn->inode->is_dir())
- c.nsubdirs++;
- else
- c.nfiles++;
- }
- if (dn->is_remote()) {
- if (dn->get_remote_d_type() == DT_DIR)
- c.nsubdirs++;
- else
- c.nfiles++;
- }
- }
-
- if (c.nsubdirs != fnode.fragstat.nsubdirs ||
- c.nfiles != fnode.fragstat.nfiles) {
- dout(0) << "verify_fragstat failed " << fnode.fragstat << " on " << *this << dendl;
- dout(0) << " i count " << c << dendl;
- ceph_abort();
- } else {
- dout(0) << "verify_fragstat ok " << fnode.fragstat << " on " << *this << dendl;
- }
-}
-#endif
-
-/*****************************************************************************
- * FREEZING
- */
-
-// FREEZE TREE
-
-bool CDir::freeze_tree()
-{
- assert(!is_frozen());
- assert(!is_freezing());
-
- auth_pin(this);
- if (is_freezeable(true)) {
- _freeze_tree();
- auth_unpin(this);
- return true;
- } else {
- state_set(STATE_FREEZINGTREE);
- ++num_freezing_trees;
- dout(10) << "freeze_tree waiting " << *this << dendl;
- return false;
- }
-}
-
-void CDir::_freeze_tree()
-{
- dout(10) << "_freeze_tree " << *this << dendl;
- assert(is_freezeable(true));
-
- // twiddle state
- if (state_test(STATE_FREEZINGTREE)) {
- state_clear(STATE_FREEZINGTREE); // actually, this may get set again by next context?
- --num_freezing_trees;
- }
-
- if (is_auth()) {
- mds_authority_t auth;
- bool was_subtree = is_subtree_root();
- if (was_subtree) {
- auth = get_dir_auth();
- } else {
- // temporarily prevent parent subtree from becoming frozen.
- inode->auth_pin(this);
- // create new subtree
- auth = authority();
- }
-
- assert(auth.first >= 0);
- assert(auth.second == CDIR_AUTH_UNKNOWN);
- auth.second = auth.first;
- inode->mdcache->adjust_subtree_auth(this, auth);
- if (!was_subtree)
- inode->auth_unpin(this);
- }
-
- state_set(STATE_FROZENTREE);
- ++num_frozen_trees;
- get(PIN_FROZEN);
-}
-
-void CDir::unfreeze_tree()
-{
- dout(10) << "unfreeze_tree " << *this << dendl;
-
- if (state_test(STATE_FROZENTREE)) {
- // frozen. unfreeze.
- state_clear(STATE_FROZENTREE);
- --num_frozen_trees;
-
- put(PIN_FROZEN);
-
- if (is_auth()) {
- // must be subtree
- assert(is_subtree_root());
- // for debug purpose, caller should ensure 'dir_auth.second == dir_auth.first'
- mds_authority_t auth = get_dir_auth();
- assert(auth.first >= 0);
- assert(auth.second == auth.first);
- auth.second = CDIR_AUTH_UNKNOWN;
- inode->mdcache->adjust_subtree_auth(this, auth);
- }
-
- // waiters?
- finish_waiting(WAIT_UNFREEZE);
- } else {
- finish_waiting(WAIT_FROZEN, -1);
-
- // freezing. stop it.
- assert(state_test(STATE_FREEZINGTREE));
- state_clear(STATE_FREEZINGTREE);
- --num_freezing_trees;
- auth_unpin(this);
-
- finish_waiting(WAIT_UNFREEZE);
- }
-}
-
-bool CDir::is_freezing_tree() const
-{
- if (num_freezing_trees == 0)
- return false;
- const CDir *dir = this;
- while (1) {
- if (dir->is_freezing_tree_root()) return true;
- if (dir->is_subtree_root()) return false;
- if (dir->inode->parent)
- dir = dir->inode->parent->dir;
- else
- return false; // root on replica
- }
-}
-
-bool CDir::is_frozen_tree() const
-{
- if (num_frozen_trees == 0)
- return false;
- const CDir *dir = this;
- while (1) {
- if (dir->is_frozen_tree_root()) return true;
- if (dir->is_subtree_root()) return false;
- if (dir->inode->parent)
- dir = dir->inode->parent->dir;
- else
- return false; // root on replica
- }
-}
-
-CDir *CDir::get_frozen_tree_root()
-{
- assert(is_frozen());
- CDir *dir = this;
- while (1) {
- if (dir->is_frozen_tree_root())
- return dir;
- if (dir->inode->parent)
- dir = dir->inode->parent->dir;
- else
- ceph_abort();
- }
-}
-
-class C_Dir_AuthUnpin : public CDirContext {
- public:
- explicit C_Dir_AuthUnpin(CDir *d) : CDirContext(d) {}
- void finish(int r) override {
- dir->auth_unpin(dir->get_inode());
- }
-};
-
-void CDir::maybe_finish_freeze()
-{
- if (auth_pins != 1 || dir_auth_pins != 0)
- return;
-
- // we can freeze the _dir_ even with nested pins...
- if (state_test(STATE_FREEZINGDIR)) {
- _freeze_dir();
- auth_unpin(this);
- finish_waiting(WAIT_FROZEN);
- }
-
- if (nested_auth_pins != 0)
- return;
-
- if (state_test(STATE_FREEZINGTREE)) {
- if (!is_subtree_root() && inode->is_frozen()) {
- dout(10) << "maybe_finish_freeze !subtree root and frozen inode, waiting for unfreeze on " << inode << dendl;
- // retake an auth_pin...
- auth_pin(inode);
- // and release it when the parent inode unfreezes
- inode->add_waiter(WAIT_UNFREEZE, new C_Dir_AuthUnpin(this));
- return;
- }
-
- _freeze_tree();
- auth_unpin(this);
- finish_waiting(WAIT_FROZEN);
- }
-}
-
-
-
-// FREEZE DIR
-
-bool CDir::freeze_dir()
-{
- assert(!is_frozen());
- assert(!is_freezing());
-
- auth_pin(this);
- if (is_freezeable_dir(true)) {
- _freeze_dir();
- auth_unpin(this);
- return true;
- } else {
- state_set(STATE_FREEZINGDIR);
- dout(10) << "freeze_dir + wait " << *this << dendl;
- return false;
- }
-}
-
-void CDir::_freeze_dir()
-{
- dout(10) << "_freeze_dir " << *this << dendl;
- //assert(is_freezeable_dir(true));
- // not always true during split because the original fragment may have frozen a while
- // ago and we're just now getting around to breaking it up.
-
- state_clear(STATE_FREEZINGDIR);
- state_set(STATE_FROZENDIR);
- get(PIN_FROZEN);
-
- if (is_auth() && !is_subtree_root())
- inode->auth_pin(this); // auth_pin for duration of freeze
-}
-
-
-void CDir::unfreeze_dir()
-{
- dout(10) << "unfreeze_dir " << *this << dendl;
-
- if (state_test(STATE_FROZENDIR)) {
- state_clear(STATE_FROZENDIR);
- put(PIN_FROZEN);
-
- // unpin (may => FREEZEABLE) FIXME: is this order good?
- if (is_auth() && !is_subtree_root())
- inode->auth_unpin(this);
-
- finish_waiting(WAIT_UNFREEZE);
- } else {
- finish_waiting(WAIT_FROZEN, -1);
-
- // still freezing. stop.
- assert(state_test(STATE_FREEZINGDIR));
- state_clear(STATE_FREEZINGDIR);
- auth_unpin(this);
-
- finish_waiting(WAIT_UNFREEZE);
- }
-}
-
-/**
- * Slightly less complete than operator<<, because this is intended
- * for identifying a directory and its state rather than for dumping
- * debug output.
- */
-void CDir::dump(Formatter *f) const
-{
- assert(f != NULL);
-
- f->dump_stream("path") << get_path();
-
- f->dump_stream("dirfrag") << dirfrag();
- f->dump_int("snapid_first", first);
-
- f->dump_stream("projected_version") << get_projected_version();
- f->dump_stream("version") << get_version();
- f->dump_stream("committing_version") << get_committing_version();
- f->dump_stream("committed_version") << get_committed_version();
-
- f->dump_bool("is_rep", is_rep());
-
- if (get_dir_auth() != CDIR_AUTH_DEFAULT) {
- if (get_dir_auth().second == CDIR_AUTH_UNKNOWN) {
- f->dump_stream("dir_auth") << get_dir_auth().first;
- } else {
- f->dump_stream("dir_auth") << get_dir_auth();
- }
- } else {
- f->dump_string("dir_auth", "");
- }
-
- f->open_array_section("states");
- MDSCacheObject::dump_states(f);
- if (state_test(CDir::STATE_COMPLETE)) f->dump_string("state", "complete");
- if (state_test(CDir::STATE_FREEZINGTREE)) f->dump_string("state", "freezingtree");
- if (state_test(CDir::STATE_FROZENTREE)) f->dump_string("state", "frozentree");
- if (state_test(CDir::STATE_FROZENDIR)) f->dump_string("state", "frozendir");
- if (state_test(CDir::STATE_FREEZINGDIR)) f->dump_string("state", "freezingdir");
- if (state_test(CDir::STATE_EXPORTBOUND)) f->dump_string("state", "exportbound");
- if (state_test(CDir::STATE_IMPORTBOUND)) f->dump_string("state", "importbound");
- if (state_test(CDir::STATE_BADFRAG)) f->dump_string("state", "badfrag");
- f->close_section();
-
- MDSCacheObject::dump(f);
-}
-
-/****** Scrub Stuff *******/
-
-void CDir::scrub_info_create() const
-{
- assert(!scrub_infop);
-
- // break out of const-land to set up implicit initial state
- CDir *me = const_cast<CDir*>(this);
- fnode_t *fn = me->get_projected_fnode();
-
- std::unique_ptr<scrub_info_t> si(new scrub_info_t());
-
- si->last_recursive.version = si->recursive_start.version =
- fn->recursive_scrub_version;
- si->last_recursive.time = si->recursive_start.time =
- fn->recursive_scrub_stamp;
-
- si->last_local.version = fn->localized_scrub_version;
- si->last_local.time = fn->localized_scrub_stamp;
-
- me->scrub_infop.swap(si);
-}
-
-void CDir::scrub_initialize(const ScrubHeaderRefConst& header)
-{
- dout(20) << __func__ << dendl;
- assert(is_complete());
- assert(header != nullptr);
-
- // FIXME: weird implicit construction, is someone else meant
- // to be calling scrub_info_create first?
- scrub_info();
- assert(scrub_infop && !scrub_infop->directory_scrubbing);
-
- scrub_infop->recursive_start.version = get_projected_version();
- scrub_infop->recursive_start.time = ceph_clock_now();
-
- scrub_infop->directories_to_scrub.clear();
- scrub_infop->directories_scrubbing.clear();
- scrub_infop->directories_scrubbed.clear();
- scrub_infop->others_to_scrub.clear();
- scrub_infop->others_scrubbing.clear();
- scrub_infop->others_scrubbed.clear();
-
- for (map_t::iterator i = items.begin();
- i != items.end();
- ++i) {
- // TODO: handle snapshot scrubbing
- if (i->first.snapid != CEPH_NOSNAP)
- continue;
-
- CDentry::linkage_t *dnl = i->second->get_projected_linkage();
- if (dnl->is_primary()) {
- if (dnl->get_inode()->is_dir())
- scrub_infop->directories_to_scrub.insert(i->first);
- else
- scrub_infop->others_to_scrub.insert(i->first);
- } else if (dnl->is_remote()) {
- // TODO: check remote linkage
- }
- }
- scrub_infop->directory_scrubbing = true;
- scrub_infop->header = header;
-}
-
-void CDir::scrub_finished()
-{
- dout(20) << __func__ << dendl;
- assert(scrub_infop && scrub_infop->directory_scrubbing);
-
- assert(scrub_infop->directories_to_scrub.empty());
- assert(scrub_infop->directories_scrubbing.empty());
- scrub_infop->directories_scrubbed.clear();
- assert(scrub_infop->others_to_scrub.empty());
- assert(scrub_infop->others_scrubbing.empty());
- scrub_infop->others_scrubbed.clear();
- scrub_infop->directory_scrubbing = false;
-
- scrub_infop->last_recursive = scrub_infop->recursive_start;
- scrub_infop->last_scrub_dirty = true;
-}
-
-int CDir::_next_dentry_on_set(set<dentry_key_t>& dns, bool missing_okay,
- MDSInternalContext *cb, CDentry **dnout)
-{
- dentry_key_t dnkey;
- CDentry *dn;
-
- while (!dns.empty()) {
- set<dentry_key_t>::iterator front = dns.begin();
- dnkey = *front;
- dn = lookup(dnkey.name);
- if (!dn) {
- if (!is_complete() &&
- (!has_bloom() || is_in_bloom(dnkey.name))) {
- // need to re-read this dirfrag
- fetch(cb);
- return EAGAIN;
- }
- // okay, we lost it
- if (missing_okay) {
- dout(15) << " we no longer have directory dentry "
- << dnkey.name << ", assuming it got renamed" << dendl;
- dns.erase(dnkey);
- continue;
- } else {
- dout(5) << " we lost dentry " << dnkey.name
- << ", bailing out because that's impossible!" << dendl;
- ceph_abort();
- }
- }
- // okay, we got a dentry
- dns.erase(dnkey);
-
- if (dn->get_projected_version() < scrub_infop->last_recursive.version &&
- !(scrub_infop->header->get_force())) {
- dout(15) << " skip dentry " << dnkey.name
- << ", no change since last scrub" << dendl;
- continue;
- }
-
- *dnout = dn;
- return 0;
- }
- *dnout = NULL;
- return ENOENT;
-}
-
-int CDir::scrub_dentry_next(MDSInternalContext *cb, CDentry **dnout)
-{
- dout(20) << __func__ << dendl;
- assert(scrub_infop && scrub_infop->directory_scrubbing);
-
- dout(20) << "trying to scrub directories underneath us" << dendl;
- int rval = _next_dentry_on_set(scrub_infop->directories_to_scrub, true,
- cb, dnout);
- if (rval == 0) {
- dout(20) << __func__ << " inserted to directories scrubbing: "
- << *dnout << dendl;
- scrub_infop->directories_scrubbing.insert((*dnout)->key());
- } else if (rval == EAGAIN) {
- // we don't need to do anything else
- } else { // we emptied out the directory scrub set
- assert(rval == ENOENT);
- dout(20) << "no directories left, moving on to other kinds of dentries"
- << dendl;
-
- rval = _next_dentry_on_set(scrub_infop->others_to_scrub, false, cb, dnout);
- if (rval == 0) {
- dout(20) << __func__ << " inserted to others scrubbing: "
- << *dnout << dendl;
- scrub_infop->others_scrubbing.insert((*dnout)->key());
- }
- }
- dout(20) << " returning " << rval << " with dn=" << *dnout << dendl;
- return rval;
-}
-
-void CDir::scrub_dentries_scrubbing(list<CDentry*> *out_dentries)
-{
- dout(20) << __func__ << dendl;
- assert(scrub_infop && scrub_infop->directory_scrubbing);
-
- for (set<dentry_key_t>::iterator i =
- scrub_infop->directories_scrubbing.begin();
- i != scrub_infop->directories_scrubbing.end();
- ++i) {
- CDentry *d = lookup(i->name, i->snapid);
- assert(d);
- out_dentries->push_back(d);
- }
- for (set<dentry_key_t>::iterator i = scrub_infop->others_scrubbing.begin();
- i != scrub_infop->others_scrubbing.end();
- ++i) {
- CDentry *d = lookup(i->name, i->snapid);
- assert(d);
- out_dentries->push_back(d);
- }
-}
-
-void CDir::scrub_dentry_finished(CDentry *dn)
-{
- dout(20) << __func__ << " on dn " << *dn << dendl;
- assert(scrub_infop && scrub_infop->directory_scrubbing);
- dentry_key_t dn_key = dn->key();
- if (scrub_infop->directories_scrubbing.erase(dn_key)) {
- scrub_infop->directories_scrubbed.insert(dn_key);
- } else {
- assert(scrub_infop->others_scrubbing.count(dn_key));
- scrub_infop->others_scrubbing.erase(dn_key);
- scrub_infop->others_scrubbed.insert(dn_key);
- }
-}
-
-void CDir::scrub_maybe_delete_info()
-{
- if (scrub_infop &&
- !scrub_infop->directory_scrubbing &&
- !scrub_infop->need_scrub_local &&
- !scrub_infop->last_scrub_dirty &&
- !scrub_infop->pending_scrub_error &&
- scrub_infop->dirty_scrub_stamps.empty()) {
- scrub_infop.reset();
- }
-}
-
-bool CDir::scrub_local()
-{
- assert(is_complete());
- bool rval = check_rstats(true);
-
- scrub_info();
- if (rval) {
- scrub_infop->last_local.time = ceph_clock_now();
- scrub_infop->last_local.version = get_projected_version();
- scrub_infop->pending_scrub_error = false;
- scrub_infop->last_scrub_dirty = true;
- } else {
- scrub_infop->pending_scrub_error = true;
- if (scrub_infop->header->get_repair())
- cache->repair_dirfrag_stats(this);
- }
- return rval;
-}
-
-std::string CDir::get_path() const
-{
- std::string path;
- get_inode()->make_path_string(path, true);
- return path;
-}
-
-bool CDir::should_split_fast() const
-{
- // Max size a fragment can be before trigger fast splitting
- int fast_limit = g_conf->mds_bal_split_size * g_conf->mds_bal_fragment_fast_factor;
-
- // Fast path: the sum of accounted size and null dentries does not
- // exceed threshold: we definitely are not over it.
- if (get_frag_size() + get_num_head_null() <= fast_limit) {
- return false;
- }
-
- // Fast path: the accounted size of the frag exceeds threshold: we
- // definitely are over it
- if (get_frag_size() > fast_limit) {
- return true;
- }
-
- int64_t effective_size = 0;
-
- for (const auto &p : items) {
- const CDentry *dn = p.second;
- if (!dn->get_projected_linkage()->is_null()) {
- effective_size++;
- }
- }
-
- return effective_size > fast_limit;
-}
-
-MEMPOOL_DEFINE_OBJECT_FACTORY(CDir, co_dir, mds_co);
Code Review / stor4nfv.git / blobdiff