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CDir.cc
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CDir.cc
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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <string_view>
#include <algorithm>
#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 "MDBalancer.h"
#include "SnapClient.h"
#include "common/bloom_filter.hpp"
#include "common/likely.h"
#include "include/Context.h"
#include "common/Clock.h"
#include "osdc/Objecter.h"
#include "common/config.h"
#include "include/ceph_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." << mdcache->mds->get_nodeid() << ".cache.dir(" << this->dirfrag() << ") "
int CDir::num_frozen_trees = 0;
int CDir::num_freezing_trees = 0;
CDir::fnode_const_ptr CDir::empty_fnode = CDir::allocate_fnode();
class CDirContext : public MDSContext
{
protected:
CDir *dir;
MDSRank* get_mds() override {return dir->mdcache->mds;}
public:
explicit CDirContext(CDir *d) : dir(d) {
ceph_assert(dir != NULL);
}
};
class CDirIOContext : public MDSIOContextBase
{
protected:
CDir *dir;
MDSRank* get_mds() override {return dir->mdcache->mds;}
public:
explicit CDirIOContext(CDir *d) : dir(d) {
ceph_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_auth_pins() || dir.get_dir_auth_pins()) {
out << " ap=" << dir.get_auth_pins()
<< "+" << dir.get_dir_auth_pins();
#ifdef MDS_AUTHPIN_SET
dir.print_authpin_set(out);
#endif
}
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_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";
if (dir.state_test(CDir::STATE_CREATING)) out << "|creating";
if (dir.state_test(CDir::STATE_COMMITTING)) out << "|committing";
if (dir.state_test(CDir::STATE_FETCHING)) out << "|fetching";
if (dir.state_test(CDir::STATE_EXPORTING)) out << "|exporting";
if (dir.state_test(CDir::STATE_IMPORTING)) out << "|importing";
if (dir.state_test(CDir::STATE_STICKY)) out << "|sticky";
if (dir.state_test(CDir::STATE_DNPINNEDFRAG)) out << "|dnpinnedfrag";
if (dir.state_test(CDir::STATE_ASSIMRSTAT)) out << "|assimrstat";
// fragstat
out << " " << dir.get_fnode()->fragstat;
if (!(dir.get_fnode()->fragstat == dir.get_fnode()->accounted_fragstat))
out << "/" << dir.get_fnode()->accounted_fragstat;
if (g_conf()->mds_debug_scatterstat && dir.is_projected()) {
const auto& pf = dir.get_projected_fnode();
out << "->" << pf->fragstat;
if (!(pf->fragstat == pf->accounted_fragstat))
out << "/" << pf->accounted_fragstat;
}
// rstat
out << " " << dir.get_fnode()->rstat;
if (!(dir.get_fnode()->rstat == dir.get_fnode()->accounted_rstat))
out << "/" << dir.get_fnode()->accounted_rstat;
if (g_conf()->mds_debug_scatterstat && dir.is_projected()) {
const auto& 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." << mdcache->mds->get_nodeid() << ".cache.dir(" << this->dirfrag() << ") ";
}
// -------------------------------------------------------------------
// CDir
CDir::CDir(CInode *in, frag_t fg, MDCache *mdc, bool auth) :
mdcache(mdc), inode(in), frag(fg),
dirty_rstat_inodes(member_offset(CInode, dirty_rstat_item)),
dirty_dentries(member_offset(CDentry, item_dir_dirty)),
item_dirty(this), item_new(this),
lock_caches_with_auth_pins(member_offset(MDLockCache::DirItem, item_dir)),
freezing_inodes(member_offset(CInode, item_freezing_inode)),
dir_rep(REP_NONE),
pop_me(mdc->decayrate),
pop_nested(mdc->decayrate),
pop_auth_subtree(mdc->decayrate),
pop_auth_subtree_nested(mdc->decayrate),
pop_spread(mdc->decayrate),
pop_lru_subdirs(member_offset(CInode, item_pop_lru)),
dir_auth(CDIR_AUTH_DEFAULT)
{
// auth
ceph_assert(in->is_dir());
if (auth)
state_set(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()) {
dout(3) << "check_rstats " << (scrub ? "(scrub) " : "")
<< "bailing out -- incomplete or non-auth or frozen dir on "
<< *this << dendl;
return !scrub;
}
frag_info_t frag_info;
nest_info_t nest_info;
for (auto 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->get_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 dentries: " << nest_info << dendl;
dout(1) << "my rstats: " << fnode->rstat << dendl;
good = false;
} else {
dout(20) << "total of child dentries: " << nest_info << dendl;
dout(20) << "my rstats: " << fnode->rstat << dendl;
}
if (!good) {
if (!scrub) {
for (auto 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->get_inode()->accounted_rstat << dendl;
} else {
dout(1) << *dn << dendl;
}
}
ceph_assert(frag_info.nfiles == fnode->fragstat.nfiles);
ceph_assert(frag_info.nsubdirs == fnode->fragstat.nsubdirs);
ceph_assert(nest_info.rbytes == fnode->rstat.rbytes);
ceph_assert(nest_info.rfiles == fnode->rstat.rfiles);
ceph_assert(nest_info.rsubdirs == fnode->rstat.rsubdirs);
}
}
dout(10) << "check_rstats complete on " << this << dendl;
return good;
}
void CDir::adjust_num_inodes_with_caps(int d)
{
// FIXME: smarter way to decide if adding 'this' to open file table
if (num_inodes_with_caps == 0 && d > 0)
mdcache->open_file_table.add_dirfrag(this);
else if (num_inodes_with_caps > 0 && num_inodes_with_caps == -d)
mdcache->open_file_table.remove_dirfrag(this);
num_inodes_with_caps += d;
ceph_assert(num_inodes_with_caps >= 0);
}
CDentry *CDir::lookup(std::string_view name, snapid_t snap)
{
dout(20) << "lookup (" << snap << ", '" << name << "')" << dendl;
auto iter = items.lower_bound(dentry_key_t(snap, name, inode->hash_dentry_name(name)));
if (iter == items.end())
return 0;
if (iter->second->get_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(std::string_view name, snapid_t last) {
dout(20) << __func__ << " (" << last << ", '" << name << "')" << dendl;
auto p = items.find(dentry_key_t(last, name, inode->hash_dentry_name(name)));
if (p == items.end())
return NULL;
return p->second;
}
/***
* linking fun
*/
CDentry* CDir::add_null_dentry(std::string_view dname,
snapid_t first, snapid_t last)
{
// foreign
ceph_assert(lookup_exact_snap(dname, last) == 0);
// create dentry
CDentry* dn = new CDentry(dname, inode->hash_dentry_name(dname), "", first, last);
dn->dir = this;
dn->version = get_projected_version();
dn->check_corruption(true);
if (is_auth())
dn->state_set(CDentry::STATE_AUTH);
mdcache->bottom_lru.lru_insert_mid(dn);
dn->state_set(CDentry::STATE_BOTTOMLRU);
// add to dir
ceph_assert(items.count(dn->key()) == 0);
//assert(null_items.count(dn->get_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) << __func__ << " " << *dn << dendl;
// pin?
if (get_num_any() == 1)
get(PIN_CHILD);
ceph_assert(get_num_any() == items.size());
return dn;
}
CDentry* CDir::add_primary_dentry(std::string_view dname, CInode *in,
mempool::mds_co::string alternate_name,
snapid_t first, snapid_t last)
{
// primary
ceph_assert(lookup_exact_snap(dname, last) == 0);
// create dentry
CDentry* dn = new CDentry(dname, inode->hash_dentry_name(dname), std::move(alternate_name), first, last);
dn->dir = this;
dn->version = get_projected_version();
dn->check_corruption(true);
if (is_auth())
dn->state_set(CDentry::STATE_AUTH);
if (is_auth() || !inode->is_stray()) {
mdcache->lru.lru_insert_mid(dn);
} else {
mdcache->bottom_lru.lru_insert_mid(dn);
dn->state_set(CDentry::STATE_BOTTOMLRU);
}
// add to dir
ceph_assert(items.count(dn->key()) == 0);
//assert(null_items.count(dn->get_name()) == 0);
items[dn->key()] = dn;
dn->get_linkage()->inode = in;
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) << __func__ << " " << *dn << dendl;
// pin?
if (get_num_any() == 1)
get(PIN_CHILD);
ceph_assert(get_num_any() == items.size());
return dn;
}
CDentry* CDir::add_remote_dentry(std::string_view dname, inodeno_t ino, unsigned char d_type,
mempool::mds_co::string alternate_name,
snapid_t first, snapid_t last)
{
// foreign
ceph_assert(lookup_exact_snap(dname, last) == 0);
// create dentry
CDentry* dn = new CDentry(dname, inode->hash_dentry_name(dname), std::move(alternate_name), ino, d_type, first, last);
dn->dir = this;
dn->version = get_projected_version();
dn->check_corruption(true);
if (is_auth())
dn->state_set(CDentry::STATE_AUTH);
mdcache->lru.lru_insert_mid(dn);
// add to dir
ceph_assert(items.count(dn->key()) == 0);
//assert(null_items.count(dn->get_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) << __func__ << " " << *dn << dendl;
// pin?
if (get_num_any() == 1)
get(PIN_CHILD);
ceph_assert(get_num_any() == items.size());
return dn;
}
void CDir::remove_dentry(CDentry *dn)
{
dout(12) << __func__ << " " << *dn << dendl;
// there should be no client leases at this point!
ceph_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
ceph_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))
mdcache->bottom_lru.lru_remove(dn);
else
mdcache->lru.lru_remove(dn);
delete dn;
// unpin?
if (get_num_any() == 0)
put(PIN_CHILD);
ceph_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) << __func__ << " " << *dn << " remote " << ino << dendl;
ceph_assert(dn->get_linkage()->is_null());
dn->get_linkage()->set_remote(ino, d_type);
if (dn->state_test(CDentry::STATE_BOTTOMLRU)) {
mdcache->bottom_lru.lru_remove(dn);
mdcache->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--;
}
ceph_assert(get_num_any() == items.size());
}
void CDir::link_primary_inode(CDentry *dn, CInode *in)
{
dout(12) << __func__ << " " << *dn << " " << *in << dendl;
ceph_assert(dn->get_linkage()->is_null());
dn->get_linkage()->inode = in;
link_inode_work(dn, in);
if (dn->state_test(CDentry::STATE_BOTTOMLRU) &&
(is_auth() || !inode->is_stray())) {
mdcache->bottom_lru.lru_remove(dn);
mdcache->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--;
}
ceph_assert(get_num_any() == items.size());
}
void CDir::link_inode_work( CDentry *dn, CInode *in)
{
ceph_assert(dn->get_linkage()->get_inode() == in);
in->set_primary_parent(dn);
// set inode version
//in->inode.version = dn->get_version();
// pin dentry?
if (in->get_num_ref())
dn->get(CDentry::PIN_INODEPIN);
if (in->state_test(CInode::STATE_TRACKEDBYOFT))
mdcache->open_file_table.notify_link(in);
if (in->is_any_caps())
adjust_num_inodes_with_caps(1);
// adjust auth pin count
if (in->auth_pins)
dn->adjust_nested_auth_pins(in->auth_pins, NULL);
if (in->is_freezing_inode())
freezing_inodes.push_back(&in->item_freezing_inode);
else if (in->is_frozen_inode() || in->is_frozen_auth_pin())
num_frozen_inodes++;
// 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) << __func__ << " " << *dn << " " << *dn->get_linkage()->get_inode() << dendl;
} else {
dout(12) << __func__ << " " << *dn << dendl;
}
unlink_inode_work(dn);
if (adjust_lru && !dn->state_test(CDentry::STATE_BOTTOMLRU)) {
mdcache->lru.lru_remove(dn);
mdcache->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++;
}
ceph_assert(get_num_any() == items.size());
}
void CDir::try_remove_unlinked_dn(CDentry *dn)
{
ceph_assert(dn->dir == this);
ceph_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) << __func__ << " " << *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);
if (in->state_test(CInode::STATE_TRACKEDBYOFT))
mdcache->open_file_table.notify_unlink(in);
if (in->is_any_caps())
adjust_num_inodes_with_caps(-1);
// unlink auth_pin count
if (in->auth_pins)
dn->adjust_nested_auth_pins(-in->auth_pins, nullptr);
if (in->is_freezing_inode())
in->item_freezing_inode.remove_myself();
else if (in->is_frozen_inode() || in->is_frozen_auth_pin())
num_frozen_inodes--;
// detach inode
in->remove_primary_parent(dn);
if (in->is_dir())
in->item_pop_lru.remove_myself();
dn->get_linkage()->inode = 0;
} else {
ceph_assert(!dn->get_linkage()->is_null());
}
}
void CDir::add_to_bloom(CDentry *dn)
{
ceph_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 (mdcache->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->get_name().data(), dn->get_name().size());
}
bool CDir::is_in_bloom(std::string_view name)
{
if (!bloom)
return false;
return bloom->contains(name.data(), name.size());
}
void CDir::remove_null_dentries() {
dout(12) << __func__ << " " << *this << dendl;
auto p = items.begin();
while (p != items.end()) {
CDentry *dn = p->second;
++p;
if (dn->get_linkage()->is_null() && !dn->is_projected())
remove_dentry(dn);
}
ceph_assert(num_snap_null == 0);
ceph_assert(num_head_null == 0);
ceph_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;
ceph_assert(get_parent_dir()->inode->is_stray());
// clear dirty only when the directory was not snapshotted
bool clear_dirty = !inode->snaprealm;
auto p = items.begin();
while (p != items.end()) {
CDentry *dn = p->second;
++p;
if (dn->last == CEPH_NOSNAP) {
ceph_assert(!dn->is_projected());
ceph_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(mdcache->mds->locker);
if (dn->get_num_ref() == 0)
remove_dentry(dn);
} else {
ceph_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)
mdcache->remove_inode(in);
}
}
}
if (clear_dirty && is_dirty())
mark_clean();
}
bool CDir::try_trim_snap_dentry(CDentry *dn, const set<snapid_t>& snaps)
{
if (dn->last == CEPH_NOSNAP) {
return false;
}
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;
mdcache->remove_inode(in);
}
return true;
}
return false;
}
/**
* 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) << __func__ << " " << *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++;
auto _fnode = _get_fnode();
if (dn->get_linkage()->is_primary()) {
CInode *in = dn->get_linkage()->get_inode();
const auto& pi = in->get_projected_inode();
if (in->is_dir()) {
_fnode->fragstat.nsubdirs++;
if (in->item_pop_lru.is_on_list())
pop_lru_subdirs.push_back(&in->item_pop_lru);
} 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.rsnaps += pi->accounted_rstat.rsnaps;
if (pi->accounted_rstat.rctime > fnode->rstat.rctime)
_fnode->rstat.rctime = pi->accounted_rstat.rctime;
if (in->is_any_caps())
adjust_num_inodes_with_caps(1);
// 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);
}
}
{
int dap = dn->get_num_dir_auth_pins();
if (dap) {
adjust_nested_auth_pins(dap, NULL);
dn->dir->adjust_nested_auth_pins(-dap, NULL);
}
}
if (dn->is_dirty()) {
dirty_dentries.push_back(&dn->item_dir_dirty);
num_dirty++;
}
dn->dir = this;
}
void CDir::prepare_old_fragment(map<string_snap_t, MDSContext::vec >& 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 (const auto &p : waiting_on_dentry) {
auto &e = dentry_waiters[p.first];
for (const auto &waiter : p.second) {
e.push_back(waiter);
}
}
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(MDSContext::vec& 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
ceph_assert(is_frozen_dir());
unfreeze_dir();
}
}
ceph_assert(dir_auth_pins == 0);
ceph_assert(auth_pins == 0);
num_head_items = num_head_null = 0;
num_snap_items = num_snap_null = 0;
adjust_num_inodes_with_caps(-num_inodes_with_caps);
// 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);
ceph_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, std::vector<CDir*>* subs, MDSContext::vec& waiters, bool replay)
{
dout(10) << "split by " << bits << " bits on " << *this << dendl;
ceph_assert(replay || is_complete() || !is_auth());
frag_vec_t frags;
frag.split(bits, frags);
vector<CDir*> subfrags(1 << bits);