--- /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