+++ /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 "CDentry.h"
-#include "CInode.h"
-#include "CDir.h"
-
-#include "MDSRank.h"
-#include "MDCache.h"
-#include "Locker.h"
-#include "LogSegment.h"
-
-#include "messages/MLock.h"
-
-#define dout_context g_ceph_context
-#define dout_subsys ceph_subsys_mds
-#undef dout_prefix
-#define dout_prefix *_dout << "mds." << dir->cache->mds->get_nodeid() << ".cache.den(" << dir->dirfrag() << " " << name << ") "
-
-
-ostream& CDentry::print_db_line_prefix(ostream& out)
-{
- return out << ceph_clock_now() << " mds." << dir->cache->mds->get_nodeid() << ".cache.den(" << dir->ino() << " " << name << ") ";
-}
-
-LockType CDentry::lock_type(CEPH_LOCK_DN);
-LockType CDentry::versionlock_type(CEPH_LOCK_DVERSION);
-
-
-// CDentry
-
-ostream& operator<<(ostream& out, const CDentry& dn)
-{
- filepath path;
- dn.make_path(path);
-
- out << "[dentry " << path;
-
- if (true || dn.first != 0 || dn.last != CEPH_NOSNAP) {
- out << " [" << dn.first << ",";
- if (dn.last == CEPH_NOSNAP)
- out << "head";
- else
- out << dn.last;
- out << ']';
- }
-
- if (dn.is_auth()) {
- out << " auth";
- if (dn.is_replicated())
- out << dn.get_replicas();
- } else {
- out << " rep@" << dn.authority();
- out << "." << dn.get_replica_nonce();
- }
-
- if (dn.get_linkage()->is_null()) out << " NULL";
- if (dn.get_linkage()->is_remote()) {
- out << " REMOTE(";
- out << dn.get_linkage()->get_remote_d_type_string();
- out << ")";
- }
-
- if (!dn.lock.is_sync_and_unlocked())
- out << " " << dn.lock;
- if (!dn.versionlock.is_sync_and_unlocked())
- out << " " << dn.versionlock;
-
- if (dn.get_projected_version() != dn.get_version())
- out << " pv=" << dn.get_projected_version();
- out << " v=" << dn.get_version();
-
- if (dn.is_auth_pinned())
- out << " ap=" << dn.get_num_auth_pins() << "+" << dn.get_num_nested_auth_pins();
-
- out << " inode=" << dn.get_linkage()->get_inode();
-
- out << " state=" << dn.get_state();
- if (dn.is_new()) out << "|new";
- if (dn.state_test(CDentry::STATE_BOTTOMLRU)) out << "|bottomlru";
-
- if (dn.get_num_ref()) {
- out << " |";
- dn.print_pin_set(out);
- }
-
- out << " " << &dn;
- out << "]";
- return out;
-}
-
-
-bool operator<(const CDentry& l, const CDentry& r)
-{
- if ((l.get_dir()->ino() < r.get_dir()->ino()) ||
- (l.get_dir()->ino() == r.get_dir()->ino() &&
- (l.get_name() < r.get_name() ||
- (l.get_name() == r.get_name() && l.last < r.last))))
- return true;
- return false;
-}
-
-
-void CDentry::print(ostream& out)
-{
- out << *this;
-}
-
-
-/*
-inodeno_t CDentry::get_ino()
-{
- if (get_inode())
- return get_inode()->ino();
- return inodeno_t();
-}
-*/
-
-mds_authority_t CDentry::authority() const
-{
- return dir->authority();
-}
-
-
-void CDentry::add_waiter(uint64_t tag, MDSInternalContextBase *c)
-{
- // wait on the directory?
- if (tag & (WAIT_UNFREEZE|WAIT_SINGLEAUTH)) {
- dir->add_waiter(tag, c);
- return;
- }
- MDSCacheObject::add_waiter(tag, c);
-}
-
-
-version_t CDentry::pre_dirty(version_t min)
-{
- projected_version = dir->pre_dirty(min);
- dout(10) << " pre_dirty " << *this << dendl;
- return projected_version;
-}
-
-
-void CDentry::_mark_dirty(LogSegment *ls)
-{
- // state+pin
- if (!state_test(STATE_DIRTY)) {
- state_set(STATE_DIRTY);
- dir->inc_num_dirty();
- get(PIN_DIRTY);
- assert(ls);
- }
- if (ls)
- ls->dirty_dentries.push_back(&item_dirty);
-}
-
-void CDentry::mark_dirty(version_t pv, LogSegment *ls)
-{
- dout(10) << " mark_dirty " << *this << dendl;
-
- // i now live in this new dir version
- assert(pv <= projected_version);
- version = pv;
- _mark_dirty(ls);
-
- // mark dir too
- dir->mark_dirty(pv, ls);
-}
-
-
-void CDentry::mark_clean()
-{
- dout(10) << " mark_clean " << *this << dendl;
- assert(is_dirty());
-
- // not always true for recalc_auth_bits during resolve finish
- //assert(dir->get_version() == 0 || version <= dir->get_version()); // hmm?
-
- // state+pin
- state_clear(STATE_DIRTY);
- dir->dec_num_dirty();
- put(PIN_DIRTY);
-
- item_dirty.remove_myself();
-
- clear_new();
-}
-
-void CDentry::mark_new()
-{
- dout(10) << " mark_new " << *this << dendl;
- state_set(STATE_NEW);
-}
-
-void CDentry::make_path_string(string& s, bool projected) const
-{
- if (dir) {
- dir->inode->make_path_string(s, projected);
- } else {
- s = "???";
- }
- s += "/";
- s.append(name.data(), name.length());
-}
-
-void CDentry::make_path(filepath& fp, bool projected) const
-{
- assert(dir);
- dir->inode->make_path(fp, projected);
- fp.push_dentry(name);
-}
-
-/*
- * we only add ourselves to remote_parents when the linkage is
- * active (no longer projected). if the passed dnl is projected,
- * don't link in, and do that work later in pop_projected_linkage().
- */
-void CDentry::link_remote(CDentry::linkage_t *dnl, CInode *in)
-{
- assert(dnl->is_remote());
- assert(in->ino() == dnl->get_remote_ino());
- dnl->inode = in;
-
- if (dnl == &linkage)
- in->add_remote_parent(this);
-}
-
-void CDentry::unlink_remote(CDentry::linkage_t *dnl)
-{
- assert(dnl->is_remote());
- assert(dnl->inode);
-
- if (dnl == &linkage)
- dnl->inode->remove_remote_parent(this);
-
- dnl->inode = 0;
-}
-
-void CDentry::push_projected_linkage()
-{
- _project_linkage();
-
- if (is_auth()) {
- CInode *diri = dir->inode;
- if (diri->is_stray())
- diri->mdcache->notify_stray_removed();
- }
-}
-
-
-void CDentry::push_projected_linkage(CInode *inode)
-{
- // dirty rstat tracking is in the projected plane
- bool dirty_rstat = inode->is_dirty_rstat();
- if (dirty_rstat)
- inode->clear_dirty_rstat();
-
- _project_linkage()->inode = inode;
- inode->push_projected_parent(this);
-
- if (dirty_rstat)
- inode->mark_dirty_rstat();
-
- if (is_auth()) {
- CInode *diri = dir->inode;
- if (diri->is_stray())
- diri->mdcache->notify_stray_created();
- }
-}
-
-CDentry::linkage_t *CDentry::pop_projected_linkage()
-{
- assert(projected.size());
-
- linkage_t& n = projected.front();
-
- /*
- * the idea here is that the link_remote_inode(), link_primary_inode(),
- * etc. calls should make linkage identical to &n (and we assert as
- * much).
- */
-
- if (n.remote_ino) {
- dir->link_remote_inode(this, n.remote_ino, n.remote_d_type);
- if (n.inode) {
- linkage.inode = n.inode;
- linkage.inode->add_remote_parent(this);
- }
- } else if (n.inode) {
- dir->link_primary_inode(this, n.inode);
- n.inode->pop_projected_parent();
- }
-
- assert(n.inode == linkage.inode);
- assert(n.remote_ino == linkage.remote_ino);
- assert(n.remote_d_type == linkage.remote_d_type);
-
- projected.pop_front();
-
- return &linkage;
-}
-
-
-
-// ----------------------------
-// auth pins
-
-int CDentry::get_num_dir_auth_pins() const
-{
- assert(!is_projected());
- if (get_linkage()->is_primary())
- return auth_pins + get_linkage()->get_inode()->get_num_auth_pins();
- return auth_pins;
-}
-
-bool CDentry::can_auth_pin() const
-{
- assert(dir);
- return dir->can_auth_pin();
-}
-
-void CDentry::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
- << " now " << auth_pins << "+" << nested_auth_pins
- << dendl;
-
- dir->adjust_nested_auth_pins(1, 1, by);
-}
-
-void CDentry::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
- << " now " << auth_pins << "+" << nested_auth_pins
- << dendl;
- assert(auth_pins >= 0);
-
- dir->adjust_nested_auth_pins(-1, -1, by);
-}
-
-void CDentry::adjust_nested_auth_pins(int adjustment, int diradj, void *by)
-{
- nested_auth_pins += adjustment;
-
- dout(35) << "adjust_nested_auth_pins by " << by
- << ", change " << adjustment << " yields "
- << auth_pins << "+" << nested_auth_pins
- << dendl;
- assert(nested_auth_pins >= 0);
-
- dir->adjust_nested_auth_pins(adjustment, diradj, by);
-}
-
-bool CDentry::is_frozen() const
-{
- return dir->is_frozen();
-}
-
-bool CDentry::is_freezing() const
-{
- return dir->is_freezing();
-}
-
-void CDentry::decode_replica(bufferlist::iterator& p, bool is_new)
-{
- __u32 nonce;
- ::decode(nonce, p);
- replica_nonce = nonce;
-
- ::decode(first, p);
-
- inodeno_t rino;
- unsigned char rdtype;
- __s32 ls;
- ::decode(rino, p);
- ::decode(rdtype, p);
- ::decode(ls, p);
-
- if (is_new) {
- if (rino)
- dir->link_remote_inode(this, rino, rdtype);
- lock.set_state(ls);
- }
-}
-
-// ----------------------------
-// locking
-
-void CDentry::set_object_info(MDSCacheObjectInfo &info)
-{
- info.dirfrag = dir->dirfrag();
- info.dname = name;
- info.snapid = last;
-}
-
-void CDentry::encode_lock_state(int type, bufferlist& bl)
-{
- ::encode(first, bl);
-
- // null, ino, or remote_ino?
- char c;
- if (linkage.is_primary()) {
- c = 1;
- ::encode(c, bl);
- ::encode(linkage.get_inode()->inode.ino, bl);
- }
- else if (linkage.is_remote()) {
- c = 2;
- ::encode(c, bl);
- ::encode(linkage.get_remote_ino(), bl);
- }
- else if (linkage.is_null()) {
- // encode nothing.
- }
- else ceph_abort();
-}
-
-void CDentry::decode_lock_state(int type, bufferlist& bl)
-{
- bufferlist::iterator p = bl.begin();
-
- snapid_t newfirst;
- ::decode(newfirst, p);
-
- if (!is_auth() && newfirst != first) {
- dout(10) << "decode_lock_state first " << first << " -> " << newfirst << dendl;
- assert(newfirst > first);
- first = newfirst;
- }
-
- if (p.end()) {
- // null
- assert(linkage.is_null());
- return;
- }
-
- char c;
- inodeno_t ino;
- ::decode(c, p);
-
- switch (c) {
- case 1:
- case 2:
- ::decode(ino, p);
- // newly linked?
- if (linkage.is_null() && !is_auth()) {
- // force trim from cache!
- dout(10) << "decode_lock_state replica dentry null -> non-null, must trim" << dendl;
- //assert(get_num_ref() == 0);
- } else {
- // verify?
-
- }
- break;
- default:
- ceph_abort();
- }
-}
-
-
-ClientLease *CDentry::add_client_lease(client_t c, Session *session)
-{
- ClientLease *l;
- if (client_lease_map.count(c))
- l = client_lease_map[c];
- else {
- dout(20) << "add_client_lease client." << c << " on " << lock << dendl;
- if (client_lease_map.empty())
- get(PIN_CLIENTLEASE);
- l = client_lease_map[c] = new ClientLease(c, this);
- l->seq = ++session->lease_seq;
-
- lock.get_client_lease();
- }
-
- return l;
-}
-
-void CDentry::remove_client_lease(ClientLease *l, Locker *locker)
-{
- assert(l->parent == this);
-
- bool gather = false;
-
- dout(20) << "remove_client_lease client." << l->client << " on " << lock << dendl;
- lock.put_client_lease();
- if (lock.get_num_client_lease() == 0 && !lock.is_stable())
- gather = true;
-
- client_lease_map.erase(l->client);
- l->item_lease.remove_myself();
- l->item_session_lease.remove_myself();
- delete l;
-
- if (client_lease_map.empty())
- put(PIN_CLIENTLEASE);
-
- if (gather)
- locker->eval_gather(&lock);
-}
-
-void CDentry::remove_client_leases(Locker *locker)
-{
- while (!client_lease_map.empty())
- remove_client_lease(client_lease_map.begin()->second, locker);
-}
-
-void CDentry::_put()
-{
- if (get_num_ref() <= ((int)is_dirty() + 1)) {
- CDentry::linkage_t *dnl = get_projected_linkage();
- if (dnl->is_primary()) {
- CInode *in = dnl->get_inode();
- if (get_num_ref() == (int)is_dirty() + !!in->get_num_ref())
- in->mdcache->maybe_eval_stray(in, true);
- }
- }
-}
-
-void CDentry::dump(Formatter *f) const
-{
- assert(f != NULL);
-
- filepath path;
- make_path(path);
-
- f->dump_string("path", path.get_path());
- f->dump_unsigned("path_ino", path.get_ino().val);
- f->dump_unsigned("snap_first", first);
- f->dump_unsigned("snap_last", last);
-
- f->dump_bool("is_primary", get_linkage()->is_primary());
- f->dump_bool("is_remote", get_linkage()->is_remote());
- f->dump_bool("is_null", get_linkage()->is_null());
- f->dump_bool("is_new", is_new());
- if (get_linkage()->get_inode()) {
- f->dump_unsigned("inode", get_linkage()->get_inode()->ino());
- } else {
- f->dump_unsigned("inode", 0);
- }
-
- if (linkage.is_remote()) {
- f->dump_string("remote_type", linkage.get_remote_d_type_string());
- } else {
- f->dump_string("remote_type", "");
- }
-
- f->dump_unsigned("version", get_version());
- f->dump_unsigned("projected_version", get_projected_version());
-
- f->dump_int("auth_pins", auth_pins);
- f->dump_int("nested_auth_pins", nested_auth_pins);
-
- MDSCacheObject::dump(f);
-
- f->open_object_section("lock");
- lock.dump(f);
- f->close_section();
-
- f->open_object_section("versionlock");
- versionlock.dump(f);
- f->close_section();
-
- f->open_array_section("states");
- MDSCacheObject::dump_states(f);
- if (state_test(STATE_NEW))
- f->dump_string("state", "new");
- if (state_test(STATE_FRAGMENTING))
- f->dump_string("state", "fragmenting");
- if (state_test(STATE_PURGING))
- f->dump_string("state", "purging");
- if (state_test(STATE_BADREMOTEINO))
- f->dump_string("state", "badremoteino");
- if (state_test(STATE_STRAY))
- f->dump_string("state", "stray");
- f->close_section();
-}
-
-std::string CDentry::linkage_t::get_remote_d_type_string() const
-{
- switch (DTTOIF(remote_d_type)) {
- case S_IFSOCK: return "sock";
- case S_IFLNK: return "lnk";
- case S_IFREG: return "reg";
- case S_IFBLK: return "blk";
- case S_IFDIR: return "dir";
- case S_IFCHR: return "chr";
- case S_IFIFO: return "fifo";
- default: ceph_abort(); return "";
- }
-}
-
-MEMPOOL_DEFINE_OBJECT_FACTORY(CDentry, co_dentry, mds_co);
Code Review / stor4nfv.git / blobdiff