1 // replicated state machine interface.
7 #include "rsm_protocol.h"
12 class rsm_state_transfer {
14 virtual string marshal_state() = 0;
15 virtual void unmarshal_state(const string &) = 0;
16 virtual ~rsm_state_transfer() {}
19 class rsm : public config_view_change {
21 map<rpc_protocol::proc_id_t, handler *> procs;
22 unique_ptr<config> cfg;
23 rsm_state_transfer *stf = nullptr;
25 // On slave: expected viewstamp of next invoke request
26 // On primary: viewstamp for the next request from rsm_client
27 viewstamp last_myvs{0, 0}; // Viewstamp of the last executed request
31 bool inviewchange = true;
32 unsigned vid_commit = 0; // Latest view id that is known to rsm layer
33 unsigned vid_insync; // The view id that this node is synchronizing for
34 vector<string> backups; // A list of unsynchronized backups
36 // For testing purposes
37 unique_ptr<rpcs> testsvr;
38 bool partitioned = false;
39 bool dopartition = false;
40 bool breakpoints[2] = {};
42 rsm_client_protocol::status client_members(vector<string> & r, int i);
43 rsm_protocol::status invoke(int &, rpc_protocol::proc_id_t proc, viewstamp vs, const string & mreq);
44 rsm_protocol::status transferreq(rsm_protocol::transferres & r, const string & src,
45 viewstamp last, unsigned vid);
46 rsm_protocol::status transferdonereq(int &, const string & m, unsigned vid);
47 rsm_protocol::status joinreq(string & log, const string & src, viewstamp last);
48 rsm_test_protocol::status test_net_repairreq(rsm_test_protocol::status & r, int heal);
49 rsm_test_protocol::status breakpointreq(rsm_test_protocol::status & r, int b);
51 mutex rsm_mutex, invoke_mutex;
52 cond recovery_cond, sync_cond;
54 void execute(rpc_protocol::proc_id_t procno, const string & req, string & r);
55 rsm_client_protocol::status client_invoke(string & r, rpc_protocol::proc_id_t procno, const string & req);
56 bool statetransfer(const string & m, lock & rsm_mutex_lock);
57 bool statetransferdone(const string & m, lock & rsm_mutex_lock);
58 bool join(const string & m, lock & rsm_mutex_lock);
59 void set_primary(unsigned vid);
60 bool sync_with_backups(lock & rsm_mutex_lock);
61 bool sync_with_primary(lock & rsm_mutex_lock);
62 void net_repair(bool heal, lock & rsm_mutex_lock);
63 void breakpoint(int b);
64 void partition1(lock & rsm_mutex_lock);
65 void commit_change(unsigned vid, lock & rsm_mutex_lock);
66 void recovery NORETURN ();
68 rsm (const string & _first, const string & _me);
71 void set_state_transfer(rsm_state_transfer *_stf) { stf = _stf; }
72 void commit_change(unsigned vid);
74 template<class P, class F, class C=void> void reg(rpc_protocol::proc_t<P> proc, F f, C *c=nullptr) {
75 static_assert(is_valid_registration<P, F>::value, "RSM handler registered with incorrect argument types");
77 procs[proc.id] = marshalled_func<F>::wrap(f, c);