8 /***********************************************************
10 **********************************************************/
11 #define GET_SITEID(x) ((int *)(x))
12 #define GET_NTUPLES(x) ((int *)(x + sizeof(int)))
13 #define GET_PTR_OID(x) ((unsigned int *)(x + 2*sizeof(int)))
14 #define GET_PTR_EOFF(x,n) ((short *)(x + 2*sizeof(int) + (n*sizeof(unsigned int))))
15 #define GET_PTR_ARRYFLD(x,n) ((short *)(x + 2*sizeof(int) + (n*sizeof(unsigned int)) + (n*sizeof(short))))
16 #define ENDEBUG(s) { printf("Inside %s()\n", s); fflush(stdout);}
17 #define EXDEBUG(s) {printf("Outside %s()\n", s); fflush(stdout);}
18 /*****************************************
19 * Coordinator Messages
20 ***************************************/
21 #define READ_REQUEST 1
22 #define READ_MULT_REQUEST 2
23 #define MOVE_REQUEST 3
24 #define MOVE_MULT_REQUEST 4
25 #define TRANS_REQUEST 5
27 #define TRANS_COMMIT 7
28 #define TRANS_PREFETCH 8
29 #define TRANS_ABORT_BUT_RETRY_COMMIT_WITH_RELOCATING 9
31 /*********************************
32 * Participant Messages
33 *******************************/
34 #define OBJECT_FOUND 10
35 #define OBJECT_NOT_FOUND 11
36 #define OBJECTS_FOUND 12
37 #define OBJECTS_NOT_FOUND 13
38 #define TRANS_AGREE 17
39 #define TRANS_DISAGREE 18
40 #define TRANS_AGREE_BUT_MISSING_OBJECTS 19
41 #define TRANS_SOFT_ABORT 20
42 #define TRANS_SUCESSFUL 21
43 #define TRANS_PREFETCH_RESPONSE 22
44 #define START_REMOTE_THREAD 23
45 #define THREAD_NOTIFY_REQUEST 24
46 #define THREAD_NOTIFY_RESPONSE 25
47 #define TRANS_UNSUCESSFUL 26
48 #define CLOSE_CONNECTION 27
50 //Max number of objects
51 #define MAX_OBJECTS 20
52 //Max remote-machine connections
53 #define NUM_MACHINES 2
54 #define LOADFACTOR 0.5
55 #define DEFAULT_OBJ_STORE_SIZE 1048510 //1MB
56 //Transaction id per machine
58 #define LISTEN_PORT 2156
60 //Prefetch tuning paramters
61 #define RETRYINTERVAL 7 //N
62 #define SHUTDOWNINTERVAL 4 //M
71 #include "threadnotify.h"
72 #include <arpa/inet.h>
73 #include <sys/types.h>
74 #include <sys/socket.h>
75 #include <sys/ioctl.h>
78 #include <netinet/in.h>
79 #include <sys/types.h>
87 //bit designations for status field of objheader
93 /*******Global statistics *********/
94 extern int numprefetchsites;
98 #include "structdefs.h"
100 typedef struct objheader {
101 threadlist_t *notifylist;
102 unsigned short version;
103 unsigned short rcount;
107 (*((unsigned int *)&((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___nextobject___))
110 (*((unsigned int *)&((struct ___Object___ *) x)->___nextobject___))
113 *((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
115 #define STATUSPTR(x)\
116 ((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
119 ((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->type
121 #define GETSIZE(size, x) {\
123 if (type<NUMCLASSES) {\
124 size=classsize[type];\
126 size=classsize[type]*((struct ArrayObject *)&((objheader_t *)x)[1])->___length___+sizeof(struct ArrayObject);\
132 typedef struct objheader {
133 threadlist_t *notifylist;
136 unsigned short version;
137 unsigned short rcount;
141 #define OID(x) x->oid
142 #define TYPE(x) x->type
143 #define STATUS(x) x->status
144 #define STATUSPTR(x) &x->status
145 #define GETSIZE(size, x) size=classsize[TYPE(x)]
148 typedef struct objstr {
149 unsigned int size; //this many bytes are allocated after this header
154 typedef struct oidmidpair {
159 typedef struct transrecord {
161 chashtable_t *lookupTable;
163 struct ___Object___ * revertlist;
167 // Structure is a shared structure that keeps track of responses from the participants
168 typedef struct thread_response {
172 // Structure that holds fixed data to be sent along with TRANS_REQUEST
173 typedef struct fixed_data {
174 char control; /* control message */
175 char trans_id[TID_LEN]; /* transaction id */
176 int mcount; /* participant count */
177 unsigned int numread; /* no of objects read */
178 unsigned int nummod; /* no of objects modified */
179 unsigned int numcreated; /* no of objects created */
180 int sum_bytes; /* total bytes of modified objects in a transaction */
183 /* Structure that holds trans request information for each participant */
184 typedef struct trans_req_data {
185 fixed_data_t f; /* Holds first few fixed bytes of data sent during TRANS_REQUEST protcol*/
186 unsigned int *listmid; /* Pointer to array holding list of participants */
187 char *objread; /* Pointer to array holding oid and version number of objects that are only read */
188 unsigned int *oidmod; /* Pointer to array holding oids of objects that are modified */
189 unsigned int *oidcreated; /* Pointer to array holding oids of objects that are newly created */
192 /* Structure that holds information of objects that are not found in the participant
193 * and objs locked within a transaction during commit process */
194 typedef struct trans_commit_data{
195 unsigned int *objlocked; /* Pointer to array holding oids of objects locked inside a transaction */
196 unsigned int *objnotfound; /* Pointer to array holding oids of objects not found on the participant machine */
197 unsigned int *objvernotmatch; /* Pointer to array holding oids whose version doesn't match on the participant machine */
198 void *modptr; /* Pointer to the address in the mainobject store of the participant that holds all modified objects */
199 int numlocked; /* no of objects locked */
200 int numnotfound; /* no of objects not found */
201 int numvernotmatch; /* no of objects whose version doesn't match */
202 } trans_commit_data_t;
205 #define PRINT_TID(PTR) printf("DEBUG -> %x %d\n", PTR->mid, PTR->thread_id);
206 /* Structure for passing multiple arguments to a thread
207 * spawned to process each transaction on a machine */
208 typedef struct thread_data_array {
211 trans_req_data_t *buffer; /* Holds trans request information sent to a participant, based on threadid */
212 thread_response_t *recvmsg; /* Shared datastructure to keep track of the participants response to a trans request */
213 pthread_cond_t *threshold; /* Condition var to waking up a thread */
214 pthread_mutex_t *lock; /* Lock for counting participants response */
215 int *count; /* Variable to count responses from all participants to the TRANS_REQUEST protocol */
216 char *replyctrl; /* Shared ctrl message that stores the reply to be sent to participants, filled by decideResponse() */
217 char *replyretry; /* Shared variable that keep track if coordinator needs retry */
218 transrecord_t *rec; /* To send modified objects */
219 plistnode_t *pilehead; /* Shared variable, ptr to the head of the machine piles for the transaction rec */
220 } thread_data_array_t;
223 //Structure for passing arguments to the local m/c thread
224 typedef struct local_thread_data_array {
225 thread_data_array_t *tdata; /* Holds all the arguments send to a thread that is spawned when transaction commits */
226 trans_commit_data_t *transinfo; /* Holds information of objects locked and not found in the participant */
227 } local_thread_data_array_t;
229 //Structure to store mid and socketid information
230 typedef struct midSocketInfo {
231 unsigned int mid; /* To communicate with mid use sockid in this data structure */
235 /* Initialize main object store and lookup tables, start server thread. */
237 void send_data(int fd, void *buf, int buflen);
238 void recv_data(int fd, void *buf, int buflen);
239 int recv_data_errorcode(int fd, void *buf, int buflen);
241 /* Prototypes for object header */
242 unsigned int getNewOID(void);
243 /* end object header */
245 /* Prototypes for object store */
246 objstr_t *objstrCreate(unsigned int size); //size in bytes
247 void objstrDelete(objstr_t *store); //traverse and free entire list
248 void *objstrAlloc(objstr_t *store, unsigned int size); //size in bytes
249 void clearObjStore(); // TODO:currently only clears the prefetch cache object store
250 /* end object store */
252 /* Prototypes for server portion */
253 void *dstmListen(void *);
254 int startlistening();
255 void *dstmAccept(void *);
256 int readClientReq(trans_commit_data_t *, int);
257 int processClientReq(fixed_data_t *, trans_commit_data_t *,unsigned int *, char *, void *, unsigned int *, int);
258 char handleTransReq(fixed_data_t *, trans_commit_data_t *, unsigned int *, char *, void *, int);
259 char decideCtrlMessage(fixed_data_t *, trans_commit_data_t *, int *, int *, int *, int *, int *, void *, unsigned int *, unsigned int *, int);
260 int transCommitProcess(void *, unsigned int *, unsigned int *, int, int, int);
261 void processReqNotify(unsigned int numoid, unsigned int *oid, unsigned short *version, unsigned int mid, unsigned int threadid);
262 /* end server portion */
264 /* Prototypes for transactions */
265 /* Function called at beginning. Passes in the first parameter. */
266 /* Returns 1 if this thread should run the main process */
268 int dstmStartup(const char *);
270 int processConfigFile();
271 void addHost(unsigned int);
272 void mapObjMethod(unsigned short);
275 transrecord_t *transStart();
276 objheader_t *transRead(transrecord_t *, unsigned int);
277 objheader_t *transCreateObj(transrecord_t *, unsigned int); //returns oid header
278 int transCommit(transrecord_t *record); //return 0 if successful
279 void *transRequest(void *); //the C routine that the thread will execute when TRANS_REQUEST begins
280 void decideResponse(thread_data_array_t *);// Coordinator decides what response to send to the participant
281 char sendResponse(thread_data_array_t *, int); //Sends control message back to Participants
282 void *getRemoteObj(transrecord_t *, unsigned int, unsigned int);// returns object header from main object store after object is copied into it from remote machine
283 void *handleLocalReq(void *);//handles Local requests
284 int transComProcess(local_thread_data_array_t *);
285 int transAbortProcess(local_thread_data_array_t *);
286 void transAbort(transrecord_t *trans);
287 void sendPrefetchResponse(int sd, char *control, char *sendbuffer, int *size);
288 void prefetch(int, int, unsigned int *, unsigned short *, short*);
289 void *transPrefetch(void *);
290 void *mcqProcess(void *);
291 prefetchpile_t *foundLocal(char *);// returns node with prefetch elements(oids, offsets)
292 int lookupObject(unsigned int * oid, short offset);
293 int transPrefetchProcess(transrecord_t *, int **, short);
294 void sendPrefetchReq(prefetchpile_t*, int);
295 void sendPrefetchReqnew(prefetchpile_t*, int);
296 int getPrefetchResponse(int);
297 unsigned short getObjType(unsigned int oid);
298 int startRemoteThread(unsigned int oid, unsigned int mid);
299 plistnode_t *pInsert(plistnode_t *pile, objheader_t *headeraddr, unsigned int mid, int num_objs);
301 /* Sends notification request for thread join, if sucessful returns 0 else returns -1 */
302 int reqNotify(unsigned int *oidarry, unsigned short *versionarry, unsigned int numoid);
303 void threadNotify(unsigned int oid, unsigned short version, unsigned int tid);
304 int notifyAll(threadlist_t **head, unsigned int oid, unsigned int version);
306 /* end transactions */