94cdbb73d4
Due to race conditions, multiple messages might be received from a single read by guestServer. guestServer in this case would only handle the first message and discard the remaining ones. In this particular issue, guestServer received a heartbeat challenge response message and a vote notification response (reject) message from a single read, and the latter message was discarded. This fix rewrites message handler for virtio serial channel to handle segmented and multiple messages. It uses newline character to deliminate messages so it assumes any newline characters in client log message are removed. Change-Id: Ic6f0509c98fcedf3631f4d210f753c32c37aa442 Signed-off-by: Jack Ding <jack.ding@windriver.com>
231 lines
6.9 KiB
C++
231 lines
6.9 KiB
C++
#ifndef __INCLUDE_INSTBASECLASS_H__
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#define __INCLUDE_INSTBASECLASS_H__
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/*
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* Copyright (c) 2013-2018 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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*/
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/**
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* @file
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* Wind River CGTS Platform Guest Services "Instances Base Class Header"
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*/
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#include <json-c/json.h>
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#include "guestBase.h" /* for ... instInfo */
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typedef enum
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{
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FSM_ACTION__NONE,
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FSM_ACTION__CONNECT,
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FSM_ACTION__LAST
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} guest_fsmActions_enum ;
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typedef enum
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{
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INST_CONNECT__START = 1,
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INST_CONNECT__WAIT = 2,
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INST_CONNECT__RETRY = 3,
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INST_CONNECT__DONE = 4,
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INST_CONNECT__STAGES = 5
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} guest_connectStages_enum ;
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typedef enum
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{
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INST_MONITOR__STEADY = 0,
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INST_MONITOR__DELAY = 2,
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INST_MONITOR__FAILURE = 1,
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} guest_monitorStages_enum ;
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typedef enum
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{
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INST_MESSAGE__RECEIVE = 0,
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INST_MESSAGE__SEND_INIT_ACK = 1,
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INST_MESSAGE__RESP_WAIT = 2, /* Waiting for heartbeat challenge response */
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INST_MESSAGE__SEND_WAIT = 3, /* Waiting for period to expire for challenge resend */
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INST_MESSAGE__TRANSMIT = 4,
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INST_MESSAGE__STALL = 5
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} guest_messageStages_enum ;
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class guestInstClass
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{
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private:
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struct inst {
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/** Pointer to the previous / next host in the list */
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struct inst * prev;
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struct inst * next;
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/* Instance info */
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instInfo instance ;
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/**
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* Top level gate for the host.
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* If false then reporting for all instances are off.
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*/
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// bool reporting;
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bool query_flag ;
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#define INST_TIMER_MONITOR (0)
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#define INST_TIMER_CONNECT (1)
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#define INST_TIMER_RECONNECT (2)
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#define INST_TIMER_INIT (3)
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#define INST_TIMER_VOTE (4)
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#define INST_TIMER_MAX (5)
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// number of continuous reads for an instance to deal with
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// potential message burst
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#define INST_MSG_READ_COUNT 5
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/** General Purpose instance timer */
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// struct mtc_timer timer;
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struct mtc_timer vote_timer;
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struct mtc_timer init_timer;
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struct mtc_timer monitor_timer;
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struct mtc_timer connect_timer;
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struct mtc_timer reconnect_timer;
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guest_connectStages_enum connectStage ;
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guest_messageStages_enum messageStage ;
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guest_monitorStages_enum monitorStage ;
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guest_fsmActions_enum action ;
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int monitor_handler_count ;
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int message_handler_count ;
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int connect_handler_count ;
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int mismatch_count ;
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int heartbeat_count ;
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/* Message list for this instance*/
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list<struct json_object *> message_list ;
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};
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struct inst * inst_head ; /**< Inst Linked List Head pointer */
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struct inst * inst_tail ; /**< Inst Linked List Tail pointer */
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/** List of allocated host memory.
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*
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* An array of host pointers.
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*/
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inst * inst_ptrs[MAX_HOSTS] ;
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/** A memory allocation counter.
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*
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* Should represent the number of hosts in the linked list.
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*/
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int memory_allocs ;
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/** A memory used counter
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*
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* A variable storing the accumulated instance memory
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*/
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int memory_used ;
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bool fsm_exit ;
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void fsm_run ( void );
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struct guestInstClass::inst* newInst ( void );
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struct guestInstClass::inst* addInst ( string uuid );
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struct guestInstClass::inst* getInst ( string uuid );
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int remInst ( string uuid );
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int delInst ( struct guestInstClass::inst * inst_ptr );
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void readInst ( void );
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void print_all_instances ( void );
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void mem_log_inst_info ( void );
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struct guestInstClass::inst* getInst_timer ( timer_t tid, int timer_id );
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int message_handler ( struct guestInstClass::inst * inst_ptr );
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int connect_handler ( struct guestInstClass::inst * inst_ptr );
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int monitor_handler ( struct guestInstClass::inst * inst_ptr );
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void start_monitor_timer ( struct guestInstClass::inst * inst_ptr );
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/** Thus member function loops over all the insances and sends
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* a json string instances: [uuid:state],[uuid:state]...
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* back to the guestAgent. */
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int guestAgent_qry_handler ( void );
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int send_challenge ( struct guestInstClass::inst * inst_ptr );
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void manage_comm_loss ( void );
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void mem_log_info ( void );
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void process_msg(json_object *jobj_msg, struct guestInstClass::inst * inst_ptr);
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void parser(char *buf, ssize_t len, json_tokener* tok, int newline_found, struct guestInstClass::inst * inst_ptr);
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void handle_virtio_serial_msg(char *buf, ssize_t len, json_tokener* tok, struct guestInstClass::inst * inst_ptr);
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public:
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guestInstClass(); /**< constructor */
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~guestInstClass(); /**< destructor */
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bool reporting ;
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void print_instances ( void );
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/** handle an expired timer */
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void timer_handler ( int sig, siginfo_t *si, void *uc);
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struct mtc_timer search_timer;
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int instances ;
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void guest_fsm_run ( void );
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int qry_inst ( void );
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int add_inst ( string uuid, instInfo & instance );
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int mod_inst ( string uuid, instInfo & instance );
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int del_inst ( string uuid );
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instInfo * get_inst ( string uuid );
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ssize_t write_inst ( instInfo * ptr, const char *message, size_t size);
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void reconnect_start ( const char * uuid_ptr ) ; // string uuid );
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void set_query_flag ( string uuid );
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bool get_query_flag ( string uuid );
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bool get_reporting_state( string uuid );
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int set_reporting_state( string uuid, bool enabled );
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int send_vote_notify ( string uuid );
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int send_vote_notify_resp ( char * hostname, string uuid,
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string notification_type,
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string event_type,
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string vote_result,
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string reject_reason);
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void send_client_msg_nack ( instInfo * instInfo_ptr,
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string log_err);
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void handle_parse_failure ( struct guestInstClass::inst * inst_ptr,
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const char *key,
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struct json_object *jobj_msg);
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/* Called on controlle daemon exit */
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void free_instance_resources ( void );
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void stop_instance_timers ( struct guestInstClass::inst * inst_ptr );
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/* For select dispatch */
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struct timeval waitd ;
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fd_set inotify_readfds ;
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fd_set instance_readfds ;
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fd_set message_readfds ;
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void memLogDelimit ( void ); /**< Debug log delimiter */
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void memDumpNodeState ( string uuid );
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void memDumpAllState ( void );
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void print_node_info ( void ); /**< Print node info banner */
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};
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guestInstClass * get_instInv_ptr ( void );
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#endif /* __INCLUDE_INSTBASECLASS_H__ */
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