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-rw-r--r--src/mds/Capability.cc340
1 files changed, 340 insertions, 0 deletions
diff --git a/src/mds/Capability.cc b/src/mds/Capability.cc
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+++ b/src/mds/Capability.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 "Capability.h"
+#include "CInode.h"
+#include "SessionMap.h"
+
+#include "common/Formatter.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_mds
+#undef dout_prefix
+#define dout_prefix *_dout << "Capability "
+
+
+/*
+ * Capability::Export
+ */
+
+void Capability::Export::encode(ceph::buffer::list &bl) const
+{
+ ENCODE_START(3, 2, bl);
+ encode(cap_id, bl);
+ encode(wanted, bl);
+ encode(issued, bl);
+ encode(pending, bl);
+ encode(client_follows, bl);
+ encode(seq, bl);
+ encode(mseq, bl);
+ encode(last_issue_stamp, bl);
+ encode(state, bl);
+ ENCODE_FINISH(bl);
+}
+
+void Capability::Export::decode(ceph::buffer::list::const_iterator &p)
+{
+ DECODE_START_LEGACY_COMPAT_LEN(3, 2, 2, p);
+ decode(cap_id, p);
+ decode(wanted, p);
+ decode(issued, p);
+ decode(pending, p);
+ decode(client_follows, p);
+ decode(seq, p);
+ decode(mseq, p);
+ decode(last_issue_stamp, p);
+ if (struct_v >= 3)
+ decode(state, p);
+ DECODE_FINISH(p);
+}
+
+void Capability::Export::dump(ceph::Formatter *f) const
+{
+ f->dump_unsigned("cap_id", cap_id);
+ f->dump_stream("wanted") << ccap_string(wanted);
+ f->dump_stream("issued") << ccap_string(issued);
+ f->dump_stream("pending") << ccap_string(pending);
+ f->dump_unsigned("client_follows", client_follows);
+ f->dump_unsigned("seq", seq);
+ f->dump_unsigned("migrate_seq", mseq);
+ f->dump_stream("last_issue_stamp") << last_issue_stamp;
+}
+
+void Capability::Export::generate_test_instances(std::list<Capability::Export*>& ls)
+{
+ ls.push_back(new Export);
+ ls.push_back(new Export);
+ ls.back()->wanted = 1;
+ ls.back()->issued = 2;
+ ls.back()->pending = 3;
+ ls.back()->client_follows = 4;
+ ls.back()->mseq = 5;
+ ls.back()->last_issue_stamp = utime_t(6, 7);
+}
+
+void Capability::Import::encode(ceph::buffer::list &bl) const
+{
+ ENCODE_START(1, 1, bl);
+ encode(cap_id, bl);
+ encode(issue_seq, bl);
+ encode(mseq, bl);
+ ENCODE_FINISH(bl);
+}
+
+void Capability::Import::decode(ceph::buffer::list::const_iterator &bl)
+{
+ DECODE_START(1, bl);
+ decode(cap_id, bl);
+ decode(issue_seq, bl);
+ decode(mseq, bl);
+ DECODE_FINISH(bl);
+}
+
+void Capability::Import::dump(ceph::Formatter *f) const
+{
+ f->dump_unsigned("cap_id", cap_id);
+ f->dump_unsigned("issue_seq", issue_seq);
+ f->dump_unsigned("migrate_seq", mseq);
+}
+
+/*
+ * Capability::revoke_info
+ */
+
+void Capability::revoke_info::encode(ceph::buffer::list& bl) const
+{
+ ENCODE_START(2, 2, bl)
+ encode(before, bl);
+ encode(seq, bl);
+ encode(last_issue, bl);
+ ENCODE_FINISH(bl);
+}
+
+void Capability::revoke_info::decode(ceph::buffer::list::const_iterator& bl)
+{
+ DECODE_START_LEGACY_COMPAT_LEN(2, 2, 2, bl);
+ decode(before, bl);
+ decode(seq, bl);
+ decode(last_issue, bl);
+ DECODE_FINISH(bl);
+}
+
+void Capability::revoke_info::dump(ceph::Formatter *f) const
+{
+ f->dump_unsigned("before", before);
+ f->dump_unsigned("seq", seq);
+ f->dump_unsigned("last_issue", last_issue);
+}
+
+void Capability::revoke_info::generate_test_instances(std::list<Capability::revoke_info*>& ls)
+{
+ ls.push_back(new revoke_info);
+ ls.push_back(new revoke_info);
+ ls.back()->before = 1;
+ ls.back()->seq = 2;
+ ls.back()->last_issue = 3;
+}
+
+
+/*
+ * Capability
+ */
+Capability::Capability(CInode *i, Session *s, uint64_t id) :
+ item_session_caps(this), item_snaprealm_caps(this),
+ item_revoking_caps(this), item_client_revoking_caps(this),
+ lock_caches(member_offset(MDLockCache, item_cap_lock_cache)),
+ inode(i), session(s), cap_id(id)
+{
+ if (session) {
+ session->touch_cap_bottom(this);
+ cap_gen = session->get_cap_gen();
+ if (session->is_stale())
+ --cap_gen; // not valid
+
+ auto& conn = session->get_connection();
+ if (conn) {
+ if (!conn->has_feature(CEPH_FEATURE_MDS_INLINE_DATA))
+ state |= STATE_NOINLINE;
+ if (!conn->has_feature(CEPH_FEATURE_FS_FILE_LAYOUT_V2))
+ state |= STATE_NOPOOLNS;
+ if (!conn->has_feature(CEPH_FEATURE_MDS_QUOTA))
+ state |= STATE_NOQUOTA;
+ }
+ } else {
+ cap_gen = 0;
+ }
+}
+
+client_t Capability::get_client() const
+{
+ return session ? session->get_client() : client_t(-1);
+}
+
+int Capability::confirm_receipt(ceph_seq_t seq, unsigned caps) {
+ int was_revoking = (_issued & ~_pending);
+ if (seq == last_sent) {
+ _revokes.clear();
+ _issued = caps;
+ // don't add bits
+ _pending &= caps;
+
+ // if the revoking is not totally finished just add the
+ // new revoking caps back.
+ if (was_revoking && revoking()) {
+ CInode *in = get_inode();
+ dout(10) << "revocation is not totally finished yet on " << *in
+ << ", the session " << *session << dendl;
+ _revokes.emplace_back(_pending, last_sent, last_issue);
+ if (!is_notable())
+ mark_notable();
+ }
+ } else {
+ // can i forget any revocations?
+ while (!_revokes.empty() && _revokes.front().seq < seq)
+ _revokes.pop_front();
+ if (!_revokes.empty()) {
+ if (_revokes.front().seq == seq)
+ _revokes.begin()->before = caps;
+ calc_issued();
+ } else {
+ // seq < last_sent
+ _issued = caps | _pending;
+ }
+ }
+
+ if (was_revoking && _issued == _pending) {
+ item_revoking_caps.remove_myself();
+ item_client_revoking_caps.remove_myself();
+ maybe_clear_notable();
+ }
+ return was_revoking & ~_issued; // return revoked
+}
+
+bool Capability::is_stale() const
+{
+ return session ? session->is_stale() : false;
+}
+
+bool Capability::is_valid() const
+{
+ return !session || session->get_cap_gen() == cap_gen;
+}
+
+void Capability::revalidate()
+{
+ if (!is_valid())
+ cap_gen = session->get_cap_gen();
+}
+
+void Capability::mark_notable()
+{
+ state |= STATE_NOTABLE;
+ session->touch_cap(this);
+}
+
+void Capability::maybe_clear_notable()
+{
+ if ((_issued == _pending) &&
+ !is_clientwriteable() &&
+ !is_wanted_notable(_wanted)) {
+ ceph_assert(is_notable());
+ state &= ~STATE_NOTABLE;
+ session->touch_cap_bottom(this);
+ }
+}
+
+void Capability::set_wanted(int w) {
+ CInode *in = get_inode();
+ if (in) {
+ if (!is_wanted_notable(_wanted) && is_wanted_notable(w)) {
+ in->adjust_num_caps_notable(1);
+ if (!is_notable())
+ mark_notable();
+ } else if (is_wanted_notable(_wanted) && !is_wanted_notable(w)) {
+ in->adjust_num_caps_notable(-1);
+ maybe_clear_notable();
+ }
+ }
+ _wanted = w;
+}
+
+void Capability::encode(ceph::buffer::list& bl) const
+{
+ ENCODE_START(2, 2, bl)
+ encode(last_sent, bl);
+ encode(last_issue_stamp, bl);
+
+ encode(_wanted, bl);
+ encode(_pending, bl);
+ encode(_revokes, bl);
+ ENCODE_FINISH(bl);
+}
+
+void Capability::decode(ceph::buffer::list::const_iterator &bl)
+{
+ DECODE_START_LEGACY_COMPAT_LEN(2, 2, 2, bl)
+ decode(last_sent, bl);
+ decode(last_issue_stamp, bl);
+
+ __u32 tmp_wanted;
+ decode(tmp_wanted, bl);
+ set_wanted(tmp_wanted);
+ decode(_pending, bl);
+ decode(_revokes, bl);
+ DECODE_FINISH(bl);
+
+ calc_issued();
+}
+
+void Capability::dump(ceph::Formatter *f) const
+{
+ if (inode)
+ f->dump_stream("ino") << inode->ino();
+ f->dump_unsigned("last_sent", last_sent);
+ f->dump_stream("last_issue_stamp") << last_issue_stamp;
+ f->dump_stream("wanted") << ccap_string(_wanted);
+ f->dump_stream("pending") << ccap_string(_pending);
+
+ f->open_array_section("revokes");
+ for (const auto &r : _revokes) {
+ f->open_object_section("revoke");
+ r.dump(f);
+ f->close_section();
+ }
+ f->close_section();
+}
+
+void Capability::generate_test_instances(std::list<Capability*>& ls)
+{
+ ls.push_back(new Capability);
+ ls.push_back(new Capability);
+ ls.back()->last_sent = 11;
+ ls.back()->last_issue_stamp = utime_t(12, 13);
+ ls.back()->set_wanted(14);
+ ls.back()->_pending = 15;
+ {
+ auto &r = ls.back()->_revokes.emplace_back();
+ r.before = 16;
+ r.seq = 17;
+ r.last_issue = 18;
+ }
+ {
+ auto &r = ls.back()->_revokes.emplace_back();
+ r.before = 19;
+ r.seq = 20;
+ r.last_issue = 21;
+ }
+}
+
+MEMPOOL_DEFINE_OBJECT_FACTORY(Capability, co_cap, mds_co);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 13:01:54 +0000