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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.
+ *
+ */
+
+#ifndef CEPH_MMDSCACHEREJOIN_H
+#define CEPH_MMDSCACHEREJOIN_H
+
+#include <string_view>
+#include "include/types.h"
+#include "mds/CInode.h"
+#include "mds/CDir.h"
+#include "mds/mdstypes.h"
+#include "messages/MMDSOp.h"
+
+// sent from replica to auth
+
+class MMDSCacheRejoin final : public MMDSOp {
+public:
+ static constexpr int OP_WEAK = 1; // replica -> auth, i exist, + maybe open files.
+ static constexpr int OP_STRONG = 2; // replica -> auth, i exist, + open files and lock state.
+ static constexpr int OP_ACK = 3; // auth -> replica, here is your lock state.
+ static const char *get_opname(int op) {
+ switch (op) {
+ case OP_WEAK: return "weak";
+ case OP_STRONG: return "strong";
+ case OP_ACK: return "ack";
+ default: ceph_abort(); return 0;
+ }
+ }
+
+ // -- types --
+ struct inode_strong {
+ uint32_t nonce = 0;
+ int32_t caps_wanted = 0;
+ int32_t filelock = 0, nestlock = 0, dftlock = 0;
+ inode_strong() {}
+ inode_strong(int n, int cw, int dl, int nl, int dftl) :
+ nonce(n), caps_wanted(cw),
+ filelock(dl), nestlock(nl), dftlock(dftl) { }
+ void encode(ceph::buffer::list &bl) const {
+ using ceph::encode;
+ encode(nonce, bl);
+ encode(caps_wanted, bl);
+ encode(filelock, bl);
+ encode(nestlock, bl);
+ encode(dftlock, bl);
+ }
+ void decode(ceph::buffer::list::const_iterator &bl) {
+ using ceph::decode;
+ decode(nonce, bl);
+ decode(caps_wanted, bl);
+ decode(filelock, bl);
+ decode(nestlock, bl);
+ decode(dftlock, bl);
+ }
+ };
+ WRITE_CLASS_ENCODER(inode_strong)
+
+ struct dirfrag_strong {
+ uint32_t nonce = 0;
+ int8_t dir_rep = 0;
+ dirfrag_strong() {}
+ dirfrag_strong(int n, int dr) : nonce(n), dir_rep(dr) {}
+ void encode(ceph::buffer::list &bl) const {
+ using ceph::encode;
+ encode(nonce, bl);
+ encode(dir_rep, bl);
+ }
+ void decode(ceph::buffer::list::const_iterator &bl) {
+ using ceph::decode;
+ decode(nonce, bl);
+ decode(dir_rep, bl);
+ }
+ };
+ WRITE_CLASS_ENCODER(dirfrag_strong)
+
+ struct dn_strong {
+ snapid_t first;
+ std::string alternate_name;
+ inodeno_t ino = 0;
+ inodeno_t remote_ino = 0;
+ unsigned char remote_d_type = 0;
+ uint32_t nonce = 0;
+ int32_t lock = 0;
+ dn_strong() = default;
+ dn_strong(snapid_t f, std::string_view altn, inodeno_t pi, inodeno_t ri, unsigned char rdt, int n, int l) :
+ first(f), alternate_name(altn), ino(pi), remote_ino(ri), remote_d_type(rdt), nonce(n), lock(l) {}
+ bool is_primary() const { return ino > 0; }
+ bool is_remote() const { return remote_ino > 0; }
+ bool is_null() const { return ino == 0 && remote_ino == 0; }
+ void encode(ceph::buffer::list &bl) const {
+ using ceph::encode;
+ encode(first, bl);
+ encode(ino, bl);
+ encode(remote_ino, bl);
+ encode(remote_d_type, bl);
+ encode(nonce, bl);
+ encode(lock, bl);
+ encode(alternate_name, bl);
+ }
+ void decode(ceph::buffer::list::const_iterator &bl) {
+ using ceph::decode;
+ decode(first, bl);
+ decode(ino, bl);
+ decode(remote_ino, bl);
+ decode(remote_d_type, bl);
+ decode(nonce, bl);
+ decode(lock, bl);
+ decode(alternate_name, bl);
+ }
+ };
+ WRITE_CLASS_ENCODER(dn_strong)
+
+ struct dn_weak {
+ snapid_t first;
+ inodeno_t ino = 0;
+ dn_weak() = default;
+ dn_weak(snapid_t f, inodeno_t pi) : first(f), ino(pi) {}
+ void encode(ceph::buffer::list &bl) const {
+ using ceph::encode;
+ encode(first, bl);
+ encode(ino, bl);
+ }
+ void decode(ceph::buffer::list::const_iterator &bl) {
+ using ceph::decode;
+ decode(first, bl);
+ decode(ino, bl);
+ }
+ };
+ WRITE_CLASS_ENCODER(dn_weak)
+
+ struct lock_bls {
+ ceph::buffer::list file, nest, dft;
+ void encode(ceph::buffer::list& bl) const {
+ using ceph::encode;
+ encode(file, bl);
+ encode(nest, bl);
+ encode(dft, bl);
+ }
+ void decode(ceph::buffer::list::const_iterator& bl) {
+ using ceph::decode;
+ decode(file, bl);
+ decode(nest, bl);
+ decode(dft, bl);
+ }
+ };
+ WRITE_CLASS_ENCODER(lock_bls)
+
+ // authpins, xlocks
+ struct peer_reqid {
+ metareqid_t reqid;
+ __u32 attempt;
+ peer_reqid() : attempt(0) {}
+ peer_reqid(const metareqid_t& r, __u32 a)
+ : reqid(r), attempt(a) {}
+ void encode(ceph::buffer::list& bl) const {
+ using ceph::encode;
+ encode(reqid, bl);
+ encode(attempt, bl);
+ }
+ void decode(ceph::buffer::list::const_iterator& bl) {
+ using ceph::decode;
+ decode(reqid, bl);
+ decode(attempt, bl);
+ }
+ };
+
+ std::string_view get_type_name() const override { return "cache_rejoin"; }
+ void print(std::ostream& out) const override {
+ out << "cache_rejoin " << get_opname(op);
+ }
+
+ // -- builders --
+ // inodes
+ void add_weak_inode(vinodeno_t i) {
+ weak_inodes.insert(i);
+ }
+ void add_strong_inode(vinodeno_t i, int n, int cw, int dl, int nl, int dftl) {
+ strong_inodes[i] = inode_strong(n, cw, dl, nl, dftl);
+ }
+ void add_inode_locks(CInode *in, __u32 nonce, ceph::buffer::list& bl) {
+ using ceph::encode;
+ encode(in->ino(), inode_locks);
+ encode(in->last, inode_locks);
+ encode(nonce, inode_locks);
+ encode(bl, inode_locks);
+ }
+ void add_inode_base(CInode *in, uint64_t features) {
+ using ceph::encode;
+ encode(in->ino(), inode_base);
+ encode(in->last, inode_base);
+ ceph::buffer::list bl;
+ in->_encode_base(bl, features);
+ encode(bl, inode_base);
+ }
+ void add_inode_authpin(vinodeno_t ino, const metareqid_t& ri, __u32 attempt) {
+ authpinned_inodes[ino].push_back(peer_reqid(ri, attempt));
+ }
+ void add_inode_frozen_authpin(vinodeno_t ino, const metareqid_t& ri, __u32 attempt) {
+ frozen_authpin_inodes[ino] = peer_reqid(ri, attempt);
+ }
+ void add_inode_xlock(vinodeno_t ino, int lt, const metareqid_t& ri, __u32 attempt) {
+ xlocked_inodes[ino][lt] = peer_reqid(ri, attempt);
+ }
+ void add_inode_wrlock(vinodeno_t ino, int lt, const metareqid_t& ri, __u32 attempt) {
+ wrlocked_inodes[ino][lt].push_back(peer_reqid(ri, attempt));
+ }
+
+ void add_scatterlock_state(CInode *in) {
+ if (inode_scatterlocks.count(in->ino()))
+ return; // already added this one
+ in->encode_lock_state(CEPH_LOCK_IFILE, inode_scatterlocks[in->ino()].file);
+ in->encode_lock_state(CEPH_LOCK_INEST, inode_scatterlocks[in->ino()].nest);
+ in->encode_lock_state(CEPH_LOCK_IDFT, inode_scatterlocks[in->ino()].dft);
+ }
+
+ // dirfrags
+ void add_strong_dirfrag(dirfrag_t df, int n, int dr) {
+ strong_dirfrags[df] = dirfrag_strong(n, dr);
+ }
+ void add_dirfrag_base(CDir *dir) {
+ ceph::buffer::list& bl = dirfrag_bases[dir->dirfrag()];
+ dir->_encode_base(bl);
+ }
+
+ // dentries
+ void add_weak_dirfrag(dirfrag_t df) {
+ weak_dirfrags.insert(df);
+ }
+ void add_weak_dentry(inodeno_t dirino, std::string_view dname, snapid_t last, dn_weak& dnw) {
+ weak[dirino][string_snap_t(dname, last)] = dnw;
+ }
+ void add_weak_primary_dentry(inodeno_t dirino, std::string_view dname, snapid_t first, snapid_t last, inodeno_t ino) {
+ weak[dirino][string_snap_t(dname, last)] = dn_weak(first, ino);
+ }
+ void add_strong_dentry(dirfrag_t df, std::string_view dname, std::string_view altn, snapid_t first, snapid_t last, inodeno_t pi, inodeno_t ri, unsigned char rdt, int n, int ls) {
+ auto& m = strong_dentries[df];
+ m.insert_or_assign(string_snap_t(dname, last), dn_strong(first, altn, pi, ri, rdt, n, ls));
+ }
+ void add_dentry_authpin(dirfrag_t df, std::string_view dname, snapid_t last,
+ const metareqid_t& ri, __u32 attempt) {
+ authpinned_dentries[df][string_snap_t(dname, last)].push_back(peer_reqid(ri, attempt));
+ }
+ void add_dentry_xlock(dirfrag_t df, std::string_view dname, snapid_t last,
+ const metareqid_t& ri, __u32 attempt) {
+ xlocked_dentries[df][string_snap_t(dname, last)] = peer_reqid(ri, attempt);
+ }
+
+ // -- encoding --
+ void encode_payload(uint64_t features) override {
+ using ceph::encode;
+ encode(op, payload);
+ encode(strong_inodes, payload);
+ encode(inode_base, payload);
+ encode(inode_locks, payload);
+ encode(inode_scatterlocks, payload);
+ encode(authpinned_inodes, payload);
+ encode(frozen_authpin_inodes, payload);
+ encode(xlocked_inodes, payload);
+ encode(wrlocked_inodes, payload);
+ encode(cap_exports, payload);
+ encode(client_map, payload, features);
+ encode(imported_caps, payload);
+ encode(strong_dirfrags, payload);
+ encode(dirfrag_bases, payload);
+ encode(weak, payload);
+ encode(weak_dirfrags, payload);
+ encode(weak_inodes, payload);
+ encode(strong_dentries, payload);
+ encode(authpinned_dentries, payload);
+ encode(xlocked_dentries, payload);
+ encode(client_metadata_map, payload);
+ }
+ void decode_payload() override {
+ auto p = payload.cbegin();
+ using ceph::decode;
+ decode(op, p);
+ decode(strong_inodes, p);
+ decode(inode_base, p);
+ decode(inode_locks, p);
+ decode(inode_scatterlocks, p);
+ decode(authpinned_inodes, p);
+ decode(frozen_authpin_inodes, p);
+ decode(xlocked_inodes, p);
+ decode(wrlocked_inodes, p);
+ decode(cap_exports, p);
+ decode(client_map, p);
+ decode(imported_caps, p);
+ decode(strong_dirfrags, p);
+ decode(dirfrag_bases, p);
+ decode(weak, p);
+ decode(weak_dirfrags, p);
+ decode(weak_inodes, p);
+ decode(strong_dentries, p);
+ decode(authpinned_dentries, p);
+ decode(xlocked_dentries, p);
+ if (header.version >= 2)
+ decode(client_metadata_map, p);
+ }
+
+ // -- data --
+ int32_t op = 0;
+
+ // weak
+ std::map<inodeno_t, std::map<string_snap_t, dn_weak> > weak;
+ std::set<dirfrag_t> weak_dirfrags;
+ std::set<vinodeno_t> weak_inodes;
+ std::map<inodeno_t, lock_bls> inode_scatterlocks;
+
+ // strong
+ std::map<dirfrag_t, dirfrag_strong> strong_dirfrags;
+ std::map<dirfrag_t, std::map<string_snap_t, dn_strong> > strong_dentries;
+ std::map<vinodeno_t, inode_strong> strong_inodes;
+
+ // open
+ std::map<inodeno_t,std::map<client_t, cap_reconnect_t> > cap_exports;
+ std::map<client_t, entity_inst_t> client_map;
+ std::map<client_t,client_metadata_t> client_metadata_map;
+ ceph::buffer::list imported_caps;
+
+ // full
+ ceph::buffer::list inode_base;
+ ceph::buffer::list inode_locks;
+ std::map<dirfrag_t, ceph::buffer::list> dirfrag_bases;
+
+ std::map<vinodeno_t, std::list<peer_reqid> > authpinned_inodes;
+ std::map<vinodeno_t, peer_reqid> frozen_authpin_inodes;
+ std::map<vinodeno_t, std::map<__s32, peer_reqid> > xlocked_inodes;
+ std::map<vinodeno_t, std::map<__s32, std::list<peer_reqid> > > wrlocked_inodes;
+ std::map<dirfrag_t, std::map<string_snap_t, std::list<peer_reqid> > > authpinned_dentries;
+ std::map<dirfrag_t, std::map<string_snap_t, peer_reqid> > xlocked_dentries;
+
+private:
+ template<class T, typename... Args>
+ friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
+ template<class T, typename... Args>
+ friend MURef<T> crimson::make_message(Args&&... args);
+
+ static constexpr int HEAD_VERSION = 2;
+ static constexpr int COMPAT_VERSION = 1;
+
+ MMDSCacheRejoin(int o) : MMDSCacheRejoin() { op = o; }
+ MMDSCacheRejoin() : MMDSOp{MSG_MDS_CACHEREJOIN, HEAD_VERSION, COMPAT_VERSION} {}
+ ~MMDSCacheRejoin() final {}
+};
+
+WRITE_CLASS_ENCODER(MMDSCacheRejoin::inode_strong)
+WRITE_CLASS_ENCODER(MMDSCacheRejoin::dirfrag_strong)
+WRITE_CLASS_ENCODER(MMDSCacheRejoin::dn_strong)
+WRITE_CLASS_ENCODER(MMDSCacheRejoin::dn_weak)
+WRITE_CLASS_ENCODER(MMDSCacheRejoin::lock_bls)
+WRITE_CLASS_ENCODER(MMDSCacheRejoin::peer_reqid)
+
+inline std::ostream& operator<<(std::ostream& out, const MMDSCacheRejoin::peer_reqid& r) {
+ return out << r.reqid << '.' << r.attempt;
+}
+
+#endif
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