--- /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