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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);
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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