1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
8 * This is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License version 2.1, as published by the Free Software
11 * Foundation. See file COPYING.
24 #include "LogSegment.h"
26 #include "messages/MLock.h"
28 #define dout_context g_ceph_context
29 #define dout_subsys ceph_subsys_mds
31 #define dout_prefix *_dout << "mds." << dir->cache->mds->get_nodeid() << ".cache.den(" << dir->dirfrag() << " " << name << ") "
34 ostream& CDentry::print_db_line_prefix(ostream& out)
36 return out << ceph_clock_now() << " mds." << dir->cache->mds->get_nodeid() << ".cache.den(" << dir->ino() << " " << name << ") ";
39 LockType CDentry::lock_type(CEPH_LOCK_DN);
40 LockType CDentry::versionlock_type(CEPH_LOCK_DVERSION);
45 ostream& operator<<(ostream& out, const CDentry& dn)
50 out << "[dentry " << path;
52 if (true || dn.first != 0 || dn.last != CEPH_NOSNAP) {
53 out << " [" << dn.first << ",";
54 if (dn.last == CEPH_NOSNAP)
63 if (dn.is_replicated())
64 out << dn.get_replicas();
66 out << " rep@" << dn.authority();
67 out << "." << dn.get_replica_nonce();
70 if (dn.get_linkage()->is_null()) out << " NULL";
71 if (dn.get_linkage()->is_remote()) {
73 out << dn.get_linkage()->get_remote_d_type_string();
77 if (!dn.lock.is_sync_and_unlocked())
78 out << " " << dn.lock;
79 if (!dn.versionlock.is_sync_and_unlocked())
80 out << " " << dn.versionlock;
82 if (dn.get_projected_version() != dn.get_version())
83 out << " pv=" << dn.get_projected_version();
84 out << " v=" << dn.get_version();
86 if (dn.is_auth_pinned())
87 out << " ap=" << dn.get_num_auth_pins() << "+" << dn.get_num_nested_auth_pins();
89 out << " inode=" << dn.get_linkage()->get_inode();
91 out << " state=" << dn.get_state();
92 if (dn.is_new()) out << "|new";
93 if (dn.state_test(CDentry::STATE_BOTTOMLRU)) out << "|bottomlru";
95 if (dn.get_num_ref()) {
97 dn.print_pin_set(out);
106 bool operator<(const CDentry& l, const CDentry& r)
108 if ((l.get_dir()->ino() < r.get_dir()->ino()) ||
109 (l.get_dir()->ino() == r.get_dir()->ino() &&
110 (l.get_name() < r.get_name() ||
111 (l.get_name() == r.get_name() && l.last < r.last))))
117 void CDentry::print(ostream& out)
124 inodeno_t CDentry::get_ino()
127 return get_inode()->ino();
132 mds_authority_t CDentry::authority() const
134 return dir->authority();
138 void CDentry::add_waiter(uint64_t tag, MDSInternalContextBase *c)
140 // wait on the directory?
141 if (tag & (WAIT_UNFREEZE|WAIT_SINGLEAUTH)) {
142 dir->add_waiter(tag, c);
145 MDSCacheObject::add_waiter(tag, c);
149 version_t CDentry::pre_dirty(version_t min)
151 projected_version = dir->pre_dirty(min);
152 dout(10) << " pre_dirty " << *this << dendl;
153 return projected_version;
157 void CDentry::_mark_dirty(LogSegment *ls)
160 if (!state_test(STATE_DIRTY)) {
161 state_set(STATE_DIRTY);
162 dir->inc_num_dirty();
167 ls->dirty_dentries.push_back(&item_dirty);
170 void CDentry::mark_dirty(version_t pv, LogSegment *ls)
172 dout(10) << " mark_dirty " << *this << dendl;
174 // i now live in this new dir version
175 assert(pv <= projected_version);
180 dir->mark_dirty(pv, ls);
184 void CDentry::mark_clean()
186 dout(10) << " mark_clean " << *this << dendl;
189 // not always true for recalc_auth_bits during resolve finish
190 //assert(dir->get_version() == 0 || version <= dir->get_version()); // hmm?
193 state_clear(STATE_DIRTY);
194 dir->dec_num_dirty();
197 item_dirty.remove_myself();
202 void CDentry::mark_new()
204 dout(10) << " mark_new " << *this << dendl;
205 state_set(STATE_NEW);
208 void CDentry::make_path_string(string& s, bool projected) const
211 dir->inode->make_path_string(s, projected);
216 s.append(name.data(), name.length());
219 void CDentry::make_path(filepath& fp, bool projected) const
222 dir->inode->make_path(fp, projected);
223 fp.push_dentry(name);
227 * we only add ourselves to remote_parents when the linkage is
228 * active (no longer projected). if the passed dnl is projected,
229 * don't link in, and do that work later in pop_projected_linkage().
231 void CDentry::link_remote(CDentry::linkage_t *dnl, CInode *in)
233 assert(dnl->is_remote());
234 assert(in->ino() == dnl->get_remote_ino());
238 in->add_remote_parent(this);
241 void CDentry::unlink_remote(CDentry::linkage_t *dnl)
243 assert(dnl->is_remote());
247 dnl->inode->remove_remote_parent(this);
252 void CDentry::push_projected_linkage()
257 CInode *diri = dir->inode;
258 if (diri->is_stray())
259 diri->mdcache->notify_stray_removed();
264 void CDentry::push_projected_linkage(CInode *inode)
266 // dirty rstat tracking is in the projected plane
267 bool dirty_rstat = inode->is_dirty_rstat();
269 inode->clear_dirty_rstat();
271 _project_linkage()->inode = inode;
272 inode->push_projected_parent(this);
275 inode->mark_dirty_rstat();
278 CInode *diri = dir->inode;
279 if (diri->is_stray())
280 diri->mdcache->notify_stray_created();
284 CDentry::linkage_t *CDentry::pop_projected_linkage()
286 assert(projected.size());
288 linkage_t& n = projected.front();
291 * the idea here is that the link_remote_inode(), link_primary_inode(),
292 * etc. calls should make linkage identical to &n (and we assert as
297 dir->link_remote_inode(this, n.remote_ino, n.remote_d_type);
299 linkage.inode = n.inode;
300 linkage.inode->add_remote_parent(this);
302 } else if (n.inode) {
303 dir->link_primary_inode(this, n.inode);
304 n.inode->pop_projected_parent();
307 assert(n.inode == linkage.inode);
308 assert(n.remote_ino == linkage.remote_ino);
309 assert(n.remote_d_type == linkage.remote_d_type);
311 projected.pop_front();
318 // ----------------------------
321 int CDentry::get_num_dir_auth_pins() const
323 assert(!is_projected());
324 if (get_linkage()->is_primary())
325 return auth_pins + get_linkage()->get_inode()->get_num_auth_pins();
329 bool CDentry::can_auth_pin() const
332 return dir->can_auth_pin();
335 void CDentry::auth_pin(void *by)
341 #ifdef MDS_AUTHPIN_SET
342 auth_pin_set.insert(by);
345 dout(10) << "auth_pin by " << by << " on " << *this
346 << " now " << auth_pins << "+" << nested_auth_pins
349 dir->adjust_nested_auth_pins(1, 1, by);
352 void CDentry::auth_unpin(void *by)
356 #ifdef MDS_AUTHPIN_SET
357 assert(auth_pin_set.count(by));
358 auth_pin_set.erase(auth_pin_set.find(by));
364 dout(10) << "auth_unpin by " << by << " on " << *this
365 << " now " << auth_pins << "+" << nested_auth_pins
367 assert(auth_pins >= 0);
369 dir->adjust_nested_auth_pins(-1, -1, by);
372 void CDentry::adjust_nested_auth_pins(int adjustment, int diradj, void *by)
374 nested_auth_pins += adjustment;
376 dout(35) << "adjust_nested_auth_pins by " << by
377 << ", change " << adjustment << " yields "
378 << auth_pins << "+" << nested_auth_pins
380 assert(nested_auth_pins >= 0);
382 dir->adjust_nested_auth_pins(adjustment, diradj, by);
385 bool CDentry::is_frozen() const
387 return dir->is_frozen();
390 bool CDentry::is_freezing() const
392 return dir->is_freezing();
395 void CDentry::decode_replica(bufferlist::iterator& p, bool is_new)
399 replica_nonce = nonce;
404 unsigned char rdtype;
412 dir->link_remote_inode(this, rino, rdtype);
417 // ----------------------------
420 void CDentry::set_object_info(MDSCacheObjectInfo &info)
422 info.dirfrag = dir->dirfrag();
427 void CDentry::encode_lock_state(int type, bufferlist& bl)
431 // null, ino, or remote_ino?
433 if (linkage.is_primary()) {
436 ::encode(linkage.get_inode()->inode.ino, bl);
438 else if (linkage.is_remote()) {
441 ::encode(linkage.get_remote_ino(), bl);
443 else if (linkage.is_null()) {
449 void CDentry::decode_lock_state(int type, bufferlist& bl)
451 bufferlist::iterator p = bl.begin();
454 ::decode(newfirst, p);
456 if (!is_auth() && newfirst != first) {
457 dout(10) << "decode_lock_state first " << first << " -> " << newfirst << dendl;
458 assert(newfirst > first);
464 assert(linkage.is_null());
477 if (linkage.is_null() && !is_auth()) {
478 // force trim from cache!
479 dout(10) << "decode_lock_state replica dentry null -> non-null, must trim" << dendl;
480 //assert(get_num_ref() == 0);
492 ClientLease *CDentry::add_client_lease(client_t c, Session *session)
495 if (client_lease_map.count(c))
496 l = client_lease_map[c];
498 dout(20) << "add_client_lease client." << c << " on " << lock << dendl;
499 if (client_lease_map.empty())
500 get(PIN_CLIENTLEASE);
501 l = client_lease_map[c] = new ClientLease(c, this);
502 l->seq = ++session->lease_seq;
504 lock.get_client_lease();
510 void CDentry::remove_client_lease(ClientLease *l, Locker *locker)
512 assert(l->parent == this);
516 dout(20) << "remove_client_lease client." << l->client << " on " << lock << dendl;
517 lock.put_client_lease();
518 if (lock.get_num_client_lease() == 0 && !lock.is_stable())
521 client_lease_map.erase(l->client);
522 l->item_lease.remove_myself();
523 l->item_session_lease.remove_myself();
526 if (client_lease_map.empty())
527 put(PIN_CLIENTLEASE);
530 locker->eval_gather(&lock);
533 void CDentry::remove_client_leases(Locker *locker)
535 while (!client_lease_map.empty())
536 remove_client_lease(client_lease_map.begin()->second, locker);
541 if (get_num_ref() <= ((int)is_dirty() + 1)) {
542 CDentry::linkage_t *dnl = get_projected_linkage();
543 if (dnl->is_primary()) {
544 CInode *in = dnl->get_inode();
545 if (get_num_ref() == (int)is_dirty() + !!in->get_num_ref())
546 in->mdcache->maybe_eval_stray(in, true);
551 void CDentry::dump(Formatter *f) const
558 f->dump_string("path", path.get_path());
559 f->dump_unsigned("path_ino", path.get_ino().val);
560 f->dump_unsigned("snap_first", first);
561 f->dump_unsigned("snap_last", last);
563 f->dump_bool("is_primary", get_linkage()->is_primary());
564 f->dump_bool("is_remote", get_linkage()->is_remote());
565 f->dump_bool("is_null", get_linkage()->is_null());
566 f->dump_bool("is_new", is_new());
567 if (get_linkage()->get_inode()) {
568 f->dump_unsigned("inode", get_linkage()->get_inode()->ino());
570 f->dump_unsigned("inode", 0);
573 if (linkage.is_remote()) {
574 f->dump_string("remote_type", linkage.get_remote_d_type_string());
576 f->dump_string("remote_type", "");
579 f->dump_unsigned("version", get_version());
580 f->dump_unsigned("projected_version", get_projected_version());
582 f->dump_int("auth_pins", auth_pins);
583 f->dump_int("nested_auth_pins", nested_auth_pins);
585 MDSCacheObject::dump(f);
587 f->open_object_section("lock");
591 f->open_object_section("versionlock");
595 f->open_array_section("states");
596 MDSCacheObject::dump_states(f);
597 if (state_test(STATE_NEW))
598 f->dump_string("state", "new");
599 if (state_test(STATE_FRAGMENTING))
600 f->dump_string("state", "fragmenting");
601 if (state_test(STATE_PURGING))
602 f->dump_string("state", "purging");
603 if (state_test(STATE_BADREMOTEINO))
604 f->dump_string("state", "badremoteino");
605 if (state_test(STATE_STRAY))
606 f->dump_string("state", "stray");
610 std::string CDentry::linkage_t::get_remote_d_type_string() const
612 switch (DTTOIF(remote_d_type)) {
613 case S_IFSOCK: return "sock";
614 case S_IFLNK: return "lnk";
615 case S_IFREG: return "reg";
616 case S_IFBLK: return "blk";
617 case S_IFDIR: return "dir";
618 case S_IFCHR: return "chr";
619 case S_IFIFO: return "fifo";
620 default: ceph_abort(); return "";
624 MEMPOOL_DEFINE_OBJECT_FACTORY(CDentry, co_dentry, mds_co);