modules/ud/ud_recover.c
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FUNCTIONS
This source file includes following functions.
- TR_create_record
- TR_update_record
- tr_get_sql_record
- tr_get_long
- tr_get_int
- tr_get_str
- tr_get_dummies
- TR_get_record
- TR_delete_record
- TR_recover
- TR_check
1 /***************************************
2 $Revision: 1.2 $
3
4 Functions to keep records for crash recovery
5
6 Status: NOT REVUED, NOT TESTED
7
8 Author(s): Andrei Robachevsky
9
10 ******************/ /******************
11 Modification History:
12 andrei (11/08/2000) Created.
13 ******************/ /******************
14 Copyright (c) 2000 RIPE NCC
15
16 All Rights Reserved
17
18 Permission to use, copy, modify, and distribute this software and its
19 documentation for any purpose and without fee is hereby granted,
20 provided that the above copyright notice appear in all copies and that
21 both that copyright notice and this permission notice appear in
22 supporting documentation, and that the name of the author not be
23 used in advertising or publicity pertaining to distribution of the
24 software without specific, written prior permission.
25
26 THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
27 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL
28 AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
29 DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
30 AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
31 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
32 ***************************************/
33
34 #include "ud_tr.h"
35 #include "ud.h"
36
37 /*************************************************************
38
39 SQL Tables used to keep records needed for crash recovery
40
41 CREATE TABLE transaction_rec (
42 0 transaction_id int(11) DEFAULT '0' NOT NULL auto_increment,
43 1 object_id int(10) unsigned DEFAULT '0' NOT NULL,
44 2 sequence_id int(10) unsigned DEFAULT '1' NOT NULL,
45 3 object_type tinyint(3) unsigned DEFAULT '0' NOT NULL,
46 4 save varchar(256) DEFAULT '' NOT NULL,
47 5 error_script blob DEFAULT '' NOT NULL,
48 6 mode tinyint(4) unsigned DEFAULT '0' NOT NULL,
49 7 succeeded tinyint(4) unsigned DEFAULT '0' NOT NULL,
50 8 action tinyint(4) unsigned DEFAULT '0' NOT NULL,
51 9 status tinyint(10) unsigned DEFAULT '0' NOT NULL,
52 10 clean tinyint(3) DEFAULT '0' NOT NULL,
53 PRIMARY KEY (transaction_id)
54 );
55
56
57
58 CREATE TABLE dummy_rec (
59 transaction_id int(11) DEFAULT '0' NOT NULL,
60 object_id int(10) unsigned DEFAULT '0' NOT NULL,
61 PRIMARY KEY (transaction_id, object_id)
62 );
63
64 *************************************************************/
65
66 /************************************************************
67 * int TR_create_record() *
68 * *
69 * Create TR record *
70 * *
71 * First tries to delete record with the same transaction_id *
72 * ( transaction_id == tr->transaction_id ) *
73 * Then creates a new record in transaction_rec table *
74 * *
75 * Returns: transaction_id *
76 * *
77 ************************************************************/
78
79 long TR_create_record(Transaction_t *tr)
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80 {
81 SQ_result_set_t *sql_result;
82 GString *query;
83 int sql_err;
84
85 if(tr->load_pass != 0) return(0); /* for fast loader just return */
86
87 if ((query = g_string_sized_new(STR_L)) == NULL){
88 ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
89 die;
90 }
91 /* delete record if exists*/
92
93 TR_delete_record(tr);
94
95
96 /* compose record */
97
98 tr->action = TR_ACTION(tr->action) + TCP_ROLLBACK;
99
100 g_string_sprintf(query, "INSERT transaction_rec "
101 "SET transaction_id=%ld, "
102 "object_id=%ld, "
103 "sequence_id=%ld, "
104 "object_type=%d, "
105 "mode=%d, "
106 "action=%d, "
107 "status=%d ",
108 tr->transaction_id, tr->object_id, tr->sequence_id, tr->class_type, tr->mode, TR_ACTION(tr->action), TR_STATUS(TCP_ROLLBACK));
109 sql_err=SQ_execute_query(tr->sql_connection, query->str, &sql_result);
110
111
112 /* in case of an error copy error code and return */
113 if(sql_err) {
114 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
115 die;
116 }
117 g_string_free(query, TRUE);
118 return(tr->transaction_id);
119 }
120
121
122 /************************************************************
123 * int TR_update_record() *
124 * *
125 * UPdates TR record (transaction_rec or dummy_rec tables) *
126 * *
127 * Updates the following fields: *
128 * TF_DUMMY - dummy_rec, adding ID's as dummies are created *
129 * TF_SAVE - writes down tr->save *
130 * TF_STATUS - updates status (checkpointing) *
131 * TF_ESCRIPT - saves error script tr->error_script *
132 * *
133 * Returns: transaction_id *
134 * *
135 ************************************************************/
136
137 long TR_update_record(Transaction_t *tr, int field)
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138 {
139 SQ_result_set_t *sql_result;
140 GString *query;
141 int sql_err;
142
143 if(tr->load_pass != 0) return(0); /* for fast loader just return */
144
145 if ((query = g_string_sized_new(STR_L)) == NULL){
146 ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
147 die;
148 }
149
150 switch(field){
151 case TF_DUMMY:
152 g_string_sprintf(query, "INSERT dummy_rec "
153 "SET transaction_id=%ld, "
154 "object_id=%ld ",
155 tr->transaction_id, tr->dummy_id[tr->ndummy-1]);
156 break;
157
158 case TF_STATUS:
159 g_string_sprintf(query, "UPDATE transaction_rec "
160 "SET status=%d "
161 "WHERE transaction_id=%ld ",
162 TR_STATUS(tr->action), tr->transaction_id);
163 break;
164
165 case TF_SAVE:
166 g_string_sprintf(query, "UPDATE transaction_rec "
167 "SET save='%s' "
168 "WHERE transaction_id=%ld ",
169 tr->save, tr->transaction_id);
170 break;
171
172 case TF_ESCRIPT:
173 g_string_sprintf(query, "UPDATE transaction_rec "
174 "SET error_script='%s' "
175 "WHERE transaction_id=%ld ",
176 (tr->error_script)->str, tr->transaction_id);
177 break;
178
179 case TF_ID:
180 g_string_sprintf(query, "UPDATE transaction_rec "
181 "SET object_id=%ld, sequence_id=%ld, serial_id=%ld, succeeded=%d "
182 "WHERE transaction_id=%ld ",
183 tr->object_id, tr->sequence_id, tr->serial_id, tr->succeeded, tr->transaction_id);
184 break;
185
186 case TF_CLEAN:
187 g_string_sprintf(query, "UPDATE transaction_rec "
188 "SET clean=1 "
189 "WHERE transaction_id=%ld ",
190 tr->transaction_id);
191 break;
192
193 default: die; break;
194 }
195
196 sql_err=SQ_execute_query(tr->sql_connection, query->str, &sql_result);
197
198
199 /* in case of an error copy error code and return */
200 if(sql_err) {
201 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
202 die;
203 }
204 g_string_free(query, TRUE);
205 return(tr->transaction_id);
206 }
207
208 /* Query the database for transaction record */
209 /* if there is no record with the specified ID - this is a new transaction */
210 /************************************************************/
211 SQ_result_set_t *tr_get_sql_record(SQ_connection_t *sql_connection, long transaction_id)
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212 {
213 SQ_result_set_t *sql_result;
214 GString *query;
215 int sql_err;
216
217 if ((query = g_string_sized_new(STR_L)) == NULL){
218 ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
219 die;
220 }
221
222 /* compose query */
223 if (transaction_id == TR_LAST)
224 g_string_sprintf(query, "SELECT * FROM transaction_rec WHERE clean=%d", TCP_UNCLEAN);
225 else
226 g_string_sprintf(query, "SELECT * FROM transaction_rec WHERE transaction_id=%ld", transaction_id);
227
228 /* execute query */
229 sql_err=SQ_execute_query(sql_connection, query->str, &sql_result);
230
231
232 /* in case of an error copy error code and return */
233 if(sql_err) {
234 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(sql_connection), query->str);
235 die;
236 }
237 g_string_free(query, TRUE);
238 return(sql_result);
239 }
240
241
242 /************************************************************/
243 long tr_get_long(SQ_result_set_t *result, SQ_row_t *row, int col)
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244 {
245 long val;
246 if( sscanf(SQ_get_column_string_nocopy(result, row, col), "%ld", &val) < 1 ) { die; }
247 return(val);
248 }
249 /************************************************************/
250 int tr_get_int(SQ_result_set_t *result, SQ_row_t *row, int col)
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251 {
252 int val;
253 if( sscanf(SQ_get_column_string_nocopy(result, row, col), "%d", &val) < 1 ) { die; }
254 return(val);
255 }
256 /************************************************************/
257 char *tr_get_str(SQ_result_set_t *result, SQ_row_t *row, int col)
/* [<][>][^][v][top][bottom][index][help] */
258 {
259 return(SQ_get_column_string_nocopy(result, row, col));
260 }
261 /************************************************************/
262 int tr_get_dummies(Transaction_t *tr)
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263 {
264 SQ_result_set_t *sql_result;
265 GString *query;
266 int sql_err;
267 SQ_row_t *sql_row;
268
269 if ((query = g_string_sized_new(STR_L)) == NULL){
270 ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
271 die;
272 }
273
274 /* compose query */
275 g_string_sprintf(query, "SELECT * FROM dummy_rec WHERE transaction_id=%ld", tr->transaction_id);
276 sql_err=SQ_execute_query(tr->sql_connection, query->str, &sql_result);
277
278
279 /* in case of an error copy error code and return */
280 if(sql_err) {
281 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
282 die;
283 }
284 g_string_free(query, TRUE);
285
286 tr->ndummy=0;
287 while ( (sql_row = SQ_row_next(sql_result)) != NULL) {
288 if( sscanf(SQ_get_column_string_nocopy(sql_result, sql_row, DUMMY_OBJECT_ID), "%ld", &(tr->dummy_id[tr->ndummy])) < 1 ) { die; }
289 tr->ndummy++;
290 }
291
292 SQ_free_result(sql_result);
293 return(tr->ndummy);
294 }
295
296 /************************************************************
297 * Transaction_t * TR_get_record() *
298 * *
299 * Get the record left from the failed transaction *
300 * and fill the tr structure *
301 * *
302 * The following fields from transaction are essential: *
303 * *
304 * class_type *
305 * action *
306 * object_id *
307 * sequesnce_id *
308 * save *
309 * ndummy *
310 * dummy_id[] *
311 * error_script *
312 * *
313 * The following fields are filled in by transaction_new() *
314 * thread_upd *
315 * thread_ins *
316 * standalone *
317 *
318 * Return codes: *
319 * *
320 * NULL - everything is clean, no cleanup is needed *
321 * 1 - the database was recovered successfully *
322 * *
323 ************************************************************/
324 Transaction_t *TR_get_record(SQ_connection_t *sql_connection, long transaction_id)
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325 {
326 Transaction_t *tr;
327 /* get the record from SQL table */
328 SQ_result_set_t *result;
329 SQ_row_t *row;
330 C_Type_t class_type;
331 int res;
332
333
334 result = tr_get_sql_record(sql_connection, transaction_id);
335 if (result == NULL) return (NULL); /* no further actions */
336
337 /* fill in the Transaction structure */
338 if ((row = SQ_row_next(result))== NULL) return (NULL); /* no further actions */
339
340
341 /* Check if there is more than one row */
342 res = 0;
343 while(SQ_row_next(result))res = -1;
344 if(res == -1) die;
345
346
347 class_type = tr_get_class_type(result, row);
348 if ((tr = transaction_new(sql_connection, class_type)) == NULL) die;
349 tr->object_id = tr_get_object_id(result, row);
350
351 /* Fill in all dummies that were created */
352 tr_get_dummies(tr);
353
354 tr->sequence_id = tr_get_sequence_id(result, row);
355 tr->serial_id = tr_get_serial_id(result, row);
356 tr->save = g_strdup(tr_get_save(result, row));
357 g_string_sprintf(tr->error_script, tr_get_escript(result, row));
358
359
360 /* mode of operation */
361 tr->mode = tr_get_mode(result, row);
362 /* indication of success */
363 tr->succeeded = tr_get_success(result, row);
364 /* action is low byte */
365 tr->action = tr_get_action(result, row);
366 /* status is high byte */
367 tr->action |= (tr_get_status(result, row) <<8);
368 tr->action |= (tr_get_clean(result, row) << 8); /* bit0 bears this flag */
369
370 SQ_free_result(result);
371 return(tr);
372 }
373
374 /************************************************************
375 * int TR_delete_record() *
376 * *
377 * Deletes all associated sql records *
378 * *
379 * *
380 ************************************************************/
381 void TR_delete_record(Transaction_t *tr)
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382 {
383 GString *query;
384 int sql_err;
385
386 if(tr->load_pass != 0) return; /* for fast loader just return */
387
388 /* Delete a record from SQL DB */
389 if ((query = g_string_sized_new(STR_L)) == NULL){
390 ER_perror(FAC_UD, UD_MEM, "cannot allocate gstring\n");
391 die;
392 }
393
394 /* compose query */
395 g_string_sprintf(query, "DELETE FROM dummy_rec WHERE transaction_id=%ld", tr->transaction_id);
396 sql_err=SQ_execute_query(tr->sql_connection, query->str, NULL);
397 /* in case of an error copy error code and return */
398 if(sql_err) {
399 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
400 die;
401 }
402 g_string_sprintf(query, "DELETE FROM transaction_rec WHERE transaction_id=%ld", tr->transaction_id);
403 sql_err=SQ_execute_query(tr->sql_connection, query->str, NULL);
404 /* in case of an error copy error code and return */
405 if(sql_err) {
406 ER_perror(FAC_UD, UD_SQL, "%s[%s]\n", SQ_error(tr->sql_connection), query->str);
407 die;
408 }
409
410 g_string_free(query, TRUE);
411
412 }
413
414
415 /************************************************************
416 * int TR_recover() *
417 * *
418 * Cleans up the database after RIP daemon failure *
419 * *
420 * Return codes: *
421 * *
422 * 0 - everything is clean, no cleanup is needed *
423 * 1 - the database was recovered successfully *
424 * *
425 ************************************************************/
426 int TR_recover(SQ_connection_t *sql_connection)
/* [<][>][^][v][top][bottom][index][help] */
427 {
428 int res;
429 Transaction_t * tr;
430
431 /* XXX SQ_db_name() ? */
432 fprintf(stderr, "Checking the Database [%s]...", sql_connection->db);
433
434 /* Get the transaction record */
435 /* XXX for NRTM we may specify transaction_id = 0 ? */
436 if ((tr = TR_get_record(sql_connection, TR_LAST)) == NULL) {
437 /* everything is clean */
438 res = 0;
439 fprintf(stderr, "[OK]\n");
440 }
441 else {/* Not everything was perfect :( */
442 fprintf(stderr, "[FAILED]\n"
443 "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n"
444 "+ LAST TRANSACTION IS INCOMPLETE. ENTERING CRASH RECOVERY MODE +\n"
445 "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");
446 /* Failure occured before the ack was sent */
447 /* Roll back the transaction */
448 /* Delete transaction record (TR) as if it never happened */
449 /************************* R O L L B A C K ***************************/
450 if(TS_ROLLBACK(tr->action)) {
451 fprintf(stderr, " STATUS: Rollback\n");
452
453 /* don't rollback the transaction if we were to delete the object, but could not */
454 if(!TS_ROLLBACKED(tr->action)){
455 fprintf(stderr, " STATUS: Rollback incomplete, completing...");
456 UD_rollback(tr);
457 CP_ROLLBACK_PASSED(tr->action); TR_update_status(tr);
458 fprintf(stderr, "[OK]\n");
459 } else fprintf(stderr, " STATUS: Rollback complete [PASSED]\n");
460
461
462 if(!TS_ROLLBACKED_NH(tr->action)){
463 fprintf(stderr, " STATUS: NH rollback incomplete, completing...");
464 NH_rollback(tr->sql_connection);
465 CP_ROLLBACK_NH_PASSED(tr->action); TR_update_status(tr);
466 fprintf(stderr, "[OK]\n");
467 } else fprintf(stderr, " STATUS: NH rollback complete [PASSED]\n");
468 /* In update mode delete TR record. Next time (if any) DBupdate tries to submit, we'll start from scratch */
469 /* In NRTM mode we create a serial record even in case of failure (tr->succeeded ==0)*/
470 /* So in NRTM we need to clean up serials/transaction as well */
471 if(IS_UPDATE(tr->mode)){
472 fprintf(stderr, " STATUS: Serial does not need to be restored, deleting TR...");
473 TR_delete_record(tr);
474 fprintf(stderr, "[OK]\n");
475 } else {
476 fprintf(stderr, " STATUS: Cleaning serial, deleting TR...");
477 if(!TS_CREATED_S(tr->action))
478 UD_rollback_serial(tr);
479 else
480 UD_commit_serial(tr);
481 TR_delete_record(tr);
482 fprintf(stderr, "[OK]\n");
483 }
484
485 res = 1;
486 }
487 /************************* C O M M I T ******************************/
488 else { /* commit */
489 /* The ack was sent */
490 /* Complete the commit */
491 fprintf(stderr, " STATUS: Commit\n");
492 /* We keep the transaction record in case DBupdate failed */
493 /* and requests the same transaction after recovery ? */
494 /* Such approach will allow us to avoid 3-way handshaking with DBupdate */
495 /* So we never blocked or timed out during that phase */
496
497 /* XXX But first I implemented another approach (to keep DB tiny/tidy): */
498 /* 1. Process the transaction */
499 /* 2. In case of failure - rollback - NACK */
500 /* 3. Before commit - ACK (UD_ack()) */
501 /* 4. If UD_ack returns an error preserve a tr_record */
502 /* 5. Commit */
503 /* 6. If still alive and UD_ack passed - delete the record - all is clean */
504 /* Otherwise preserve a tr_record */
505
506 if(ACT_DELETE(tr->action)) {
507 /* check if we passed deletion process */
508 if(!TS_DELETED(tr->action)){
509 fprintf(stderr, " STATUS: Delete incomplete, completing...");
510 UD_delete(tr);
511 CP_DELETE_PASSED(tr->action); TR_update_status(tr);
512 fprintf(stderr, "[OK]\n");
513 } else fprintf(stderr, " STATUS: Delete complete [PASSED]\n");
514 }
515 else { /* update or create */
516 /* Check if we passed the deletion pass of commit */
517 if(!TS_COMMITTED_I(tr->action)){
518 fprintf(stderr, " STATUS: Commit phase I incomplete, completing...");
519 UD_commit_I(tr);
520 CP_COMMIT_I_PASSED(tr->action); TR_update_status(tr);
521 fprintf(stderr, "[OK]\n");
522 } else fprintf(stderr, " STATUS: Commit phase I complete [PASSED]\n");
523 /* Check if we passed the second pass of commit */
524 if(!TS_COMMITTED_II(tr->action)){
525 fprintf(stderr, " STATUS: Commit phase II incomplete, completing...");
526 UD_commit_II(tr);
527 CP_COMMIT_II_PASSED(tr->action); TR_update_status(tr);
528 fprintf(stderr, "[OK]\n");
529 } else fprintf(stderr, " STATUS: Commit phase II complete [PASSED]\n");
530 } /* end of delete, create, update specific operations */
531
532 /* Check if we passed the NH repository commit */
533 if(!TS_COMMITTED_NH(tr->action)){
534 fprintf(stderr, " STATUS: NH commit incomplete, completing...");
535 NH_commit(tr->sql_connection);
536 CP_COMMIT_NH_PASSED(tr->action); TR_update_status(tr);
537 fprintf(stderr, "[OK]\n");
538 } else fprintf(stderr, " STATUS: NH commit complete [PASSED]\n");
539
540
541 /* create serial file */
542 if(!TS_CREATED_S(tr->action))
543 {
544 fprintf(stderr, " STATUS: Serial rollback and restore...");
545 UD_rollback_serial(tr);
546 if(ACT_UPD_CLLPS(tr->action)) { /* this is a collapsed update (DEL + ADD) */
547 tr->action=TA_DELETE; UD_create_serial(tr);
548 tr->sequence_id++;
549 tr->action=TA_CREATE; UD_create_serial(tr);
550 }else if(ACT_UPD_DUMMY(tr->action)) { /* this was a dummy update - we need only CREATE serial */
551 tr->action=TA_CREATE;
552 tr->sequence_id++; /* because in fact this is an update (sequence_id=2) */
553 UD_create_serial(tr);
554 } else UD_create_serial(tr);
555 CP_CREATE_S_PASSED(tr->action); TR_update_status(tr);
556 }
557 fprintf(stderr, "[OK]\n");
558 UD_commit_serial(tr);
559
560 fprintf(stderr, " STATUS: Marking TR as clean...");
561 TR_mark_clean(tr);
562
563 fprintf(stderr, "[OK]\n");
564
565 res = 2;
566 }
567 }
568 transaction_free(tr);
569 fprintf(stderr, " STATUS: The Database is clean \n++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n\n");
570
571 return(res);
572 }
573
574 /************************************************************
575 * int TR_check() *
576 * *
577 * Checks if the requested transaction has already been *
578 * processed. This could happen when DBupdate crashes while *
579 * RIPupdate successfully completes the transaction. *
580 * *
581 * If this is the case, RIPupdate will return an ack to *
582 * DBupdate as if the transaction was processed again *
583 * *
584 * Return codes: *
585 * 0 - everything is clean - this is a new transaction *
586 * 1 - the stored transaction was re-played *
587 * *
588 ************************************************************/
589 int TR_check(SQ_connection_t *sql_connection, long transaction_id, int sockfd)
/* [<][>][^][v][top][bottom][index][help] */
590 {
591 Transaction_t * tr;
592
593
594 /* transaction_id == 0 means that only one record is maintained */
595 /* therefore it is not possible to replay the transaction */
596 /* and transaction_id does not uniquely identify the transaction */
597 /* suitable for NRTM and for backwards compatibility */
598 if(transaction_id <=0) return(0);
599 /* Get the transaction record */
600 /* XXX for NRTM we may specify transaction_id = 0 ? */
601 if ((tr = TR_get_record(sql_connection, transaction_id)) == NULL) return(0); /* everything is clean */
602
603 /* Check if the record is clean (it should be ) */
604 /* that means that either the transaction finished normally */
605 /* or crash recovery procedure cleaned up the database (and record as well ) */
606 if (TS_CLEAN(tr->action)) {
607 /* send an acknowledgement */
608 /* XXX Wait for ack */
609 /* XXX if ack is timed out just return, else delete the tr_record */
610 /* if(UD_ack(tr)==0) TR_delete_record(tr); */
611
612 /* Send an acknowledgement, append note that transaction was rerun */
613 tr->socket=sockfd;
614 g_string_sprintfa(tr->error_script,"I[%ld]: requested transaction was processed before\n", transaction_id);
615 UD_ack(tr);
616 ER_inf_va(FAC_UD, ASP_UD_UPDLOG, "%s requested transaction was processed before [%d]\n", UD_TAG, transaction_id);
617 transaction_free(tr);
618 }
619 else {
620 ER_perror(FAC_UD, UD_SQL, "TR is not clean\n");
621 die; /* the record should be clean */
622 }
623 return(1);
624 }
625
626