src/budb/db_dump.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /* dump the database
  11  * Dump is made to a local file. Structures are dumped in network byte order
  12  * for transportability between hosts
  13  */
  14
  15 #include <afsconfig.h>
  16 #include <afs/param.h>
  17 #include <afs/stds.h>
  18
  19 #include <roken.h>
  20
  21 #include <afs/opr.h>
  22
  23 #ifdef AFS_PTHREAD_ENV
  24 # include <opr/lock.h>
  25 #endif
  26
  27 #include <ubik.h>
  28 #include <afs/audit.h>
  29
  30 #include "database.h"
  31 #include "budb.h"
  32 #include "globals.h"
  33 #include "error_macros.h"
  34 #include "budb_errs.h"
  35 #include "budb_internal.h"
  36
  37
  38 /* dump ubik database - routines to scan the database and dump all
  39  *      the information
  40  */
  41
  42 /* -----------------------
  43  * synchronization on pipe
  44  * -----------------------
  45  */
  46
  47 /* interlocking for database dump */
  48
  49 dumpSyncT dumpSync;
  50 dumpSyncP dumpSyncPtr = &dumpSync;
  51
  52
  53 /* canWrite
  54  *      check if we should dump more of the database. Waits for the reader
  55  *      to drain the information before allowing the writer to proceed.
  56  * exit:
  57  *      1 - ok to write
  58  */
  59
  60 afs_int32
  61 canWrite(int fid)
  62 {
  63 #ifndef AFS_PTHREAD_ENV
  64     afs_int32 code = 0;
  65 #endif
  66     extern dumpSyncP dumpSyncPtr;
  67
  68     ObtainWriteLock(&dumpSyncPtr->ds_lock);
  69
  70     /* let the pipe drain */
  71     while (dumpSyncPtr->ds_bytes > 0) {
  72         if (dumpSyncPtr->ds_readerStatus == DS_WAITING) {
  73             dumpSyncPtr->ds_readerStatus = 0;
  74 #ifdef AFS_PTHREAD_ENV
  75             opr_cv_broadcast(&dumpSyncPtr->ds_readerStatus_cond);
  76 #else
  77             code = LWP_SignalProcess(&dumpSyncPtr->ds_readerStatus);
  78             if (code)
  79                 LogError(code, "canWrite: Signal delivery failed\n");
  80 #endif
  81         }
  82         dumpSyncPtr->ds_writerStatus = DS_WAITING;
  83         ReleaseWriteLock(&dumpSyncPtr->ds_lock);
  84 #ifdef AFS_PTHREAD_ENV
  85         MUTEX_ENTER(&dumpSyncPtr->ds_writerStatus_mutex);
  86         opr_cv_wait(&dumpSyncPtr->ds_writerStatus_cond, &dumpSyncPtr->ds_writerStatus_mutex);
  87         MUTEX_EXIT(&dumpSyncPtr->ds_writerStatus_mutex);
  88 #else
  89         LWP_WaitProcess(&dumpSyncPtr->ds_writerStatus);
  90 #endif
  91         ObtainWriteLock(&dumpSyncPtr->ds_lock);
  92     }
  93     return (1);
  94 }
  95
  96
  97 /* haveWritten
  98  *      record the fact that nbytes have been written. Signal the reader
  99  *      to proceed, and unlock.
 100  * exit:
 101  *      no return value
 102  */
 103
 104 void
 105 haveWritten(afs_int32 nbytes)
 106 {
 107 #ifndef AFS_PTHREAD_ENV
 108     afs_int32 code = 0;
 109 #endif
 110     extern dumpSyncP dumpSyncPtr;
 111
 112     dumpSyncPtr->ds_bytes += nbytes;
 113     if (dumpSyncPtr->ds_readerStatus == DS_WAITING) {
 114         dumpSyncPtr->ds_readerStatus = 0;
 115 #ifdef AFS_PTHREAD_ENV
 116         opr_cv_broadcast(&dumpSyncPtr->ds_readerStatus_cond);
 117 #else
 118         code = LWP_SignalProcess(&dumpSyncPtr->ds_readerStatus);
 119         if (code)
 120             LogError(code, "haveWritten: Signal delivery failed\n");
 121 #endif
 122     }
 123     ReleaseWriteLock(&dumpSyncPtr->ds_lock);
 124 }
 125
 126 /* doneWriting
 127  *      wait for the reader to drain all the information, and then set the
 128  *      done flag.
 129  */
 130
 131 void
 132 doneWriting(afs_int32 error)
 133 {
 134 #ifndef AFS_PTHREAD_ENV
 135     afs_int32 code = 0;
 136 #endif
 137
 138     /* wait for the reader */
 139     ObtainWriteLock(&dumpSyncPtr->ds_lock);
 140     while (dumpSyncPtr->ds_readerStatus != DS_WAITING) {
 141         LogDebug(4, "doneWriting: waiting for Reader\n");
 142         dumpSyncPtr->ds_writerStatus = DS_WAITING;
 143         ReleaseWriteLock(&dumpSyncPtr->ds_lock);
 144 #ifdef AFS_PTHREAD_ENV
 145         MUTEX_ENTER(&dumpSyncPtr->ds_writerStatus_mutex);
 146         opr_cv_wait(&dumpSyncPtr->ds_writerStatus_cond, &dumpSyncPtr->ds_writerStatus_mutex);
 147         MUTEX_EXIT(&dumpSyncPtr->ds_writerStatus_mutex);
 148 #else
 149         LWP_WaitProcess(&dumpSyncPtr->ds_writerStatus);
 150 #endif
 151         ObtainWriteLock(&dumpSyncPtr->ds_lock);
 152     }
 153
 154     LogDebug(4, "doneWriting: setting done\n");
 155
 156     /* signal that we are done */
 157     if (error)
 158         dumpSyncPtr->ds_writerStatus = DS_DONE_ERROR;
 159     else
 160         dumpSyncPtr->ds_writerStatus = DS_DONE;
 161     dumpSyncPtr->ds_readerStatus = 0;
 162 #ifdef AFS_PTHREAD_ENV
 163     opr_cv_broadcast(&dumpSyncPtr->ds_readerStatus_cond);
 164 #else
 165     code = LWP_NoYieldSignal(&dumpSyncPtr->ds_readerStatus);
 166     if (code)
 167         LogError(code, "doneWriting: Signal delivery failed\n");
 168 #endif
 169     ReleaseWriteLock(&dumpSyncPtr->ds_lock);
 170 }
 171
 172 /* notes:
 173  *      ut - setup and pass down
 174  */
 175
 176 /* writeStructHeader
 177  *      write header appropriate for requested structure type
 178  */
 179
 180 afs_int32
 181 writeStructHeader(int fid, afs_int32 type)
 182 {
 183     struct structDumpHeader hostDumpHeader, netDumpHeader;
 184
 185     hostDumpHeader.type = type;
 186     hostDumpHeader.structversion = 1;
 187
 188
 189     switch (type) {
 190     case SD_DBHEADER:
 191         hostDumpHeader.size = sizeof(struct DbHeader);
 192         break;
 193
 194     case SD_DUMP:
 195         hostDumpHeader.size = sizeof(struct budb_dumpEntry);
 196         break;
 197
 198     case SD_TAPE:
 199         hostDumpHeader.size = sizeof(struct budb_tapeEntry);
 200         break;
 201
 202     case SD_VOLUME:
 203         hostDumpHeader.size = sizeof(struct budb_volumeEntry);
 204         break;
 205
 206     case SD_END:
 207         hostDumpHeader.size = 0;
 208         break;
 209
 210     default:
 211         LogError(0, "writeStructHeader: invalid type %d\n", type);
 212         BUDB_EXIT(1);
 213     }
 214
 215     structDumpHeader_hton(&hostDumpHeader, &netDumpHeader);
 216
 217     if (canWrite(fid) <= 0)
 218         return (BUDB_DUMPFAILED);
 219     if (write(fid, &netDumpHeader, sizeof(netDumpHeader)) !=
 220         sizeof(netDumpHeader))
 221         return (BUDB_DUMPFAILED);
 222     haveWritten(sizeof(netDumpHeader));
 223
 224     return (0);
 225 }
 226
 227 /* writeTextHeader
 228  *      write header appropriate for requested structure type
 229  */
 230
 231 afs_int32
 232 writeTextHeader(int fid, afs_int32 type)
 233 {
 234     struct structDumpHeader hostDumpHeader, netDumpHeader;
 235
 236     hostDumpHeader.structversion = 1;
 237
 238     switch (type) {
 239     case TB_DUMPSCHEDULE:
 240         hostDumpHeader.type = SD_TEXT_DUMPSCHEDULE;
 241         break;
 242
 243     case TB_VOLUMESET:
 244         hostDumpHeader.type = SD_TEXT_VOLUMESET;
 245         break;
 246
 247     case TB_TAPEHOSTS:
 248         hostDumpHeader.type = SD_TEXT_TAPEHOSTS;
 249         break;
 250
 251     default:
 252         LogError(0, "writeTextHeader: invalid type %d\n", type);
 253         BUDB_EXIT(1);
 254     }
 255
 256     hostDumpHeader.size = ntohl(db.h.textBlock[type].size);
 257     structDumpHeader_hton(&hostDumpHeader, &netDumpHeader);
 258
 259     if (canWrite(fid) <= 0)
 260         return (BUDB_DUMPFAILED);
 261
 262     if (write(fid, &netDumpHeader, sizeof(netDumpHeader)) !=
 263         sizeof(netDumpHeader))
 264         return (BUDB_DUMPFAILED);
 265
 266     haveWritten(sizeof(netDumpHeader));
 267
 268     return (0);
 269 }
 270
 271 afs_int32
 272 writeDbHeader(int fid)
 273 {
 274     struct DbHeader header;
 275     afs_int32 curtime;
 276     afs_int32 code = 0, tcode;
 277
 278     extern struct memoryDB db;
 279
 280     /* check the memory database header for integrity */
 281     if (db.h.version != db.h.checkVersion)
 282         ERROR(BUDB_DATABASEINCONSISTENT);
 283
 284     curtime = time(0);
 285
 286     /* copy selected fields. Source is in xdr format. */
 287     header.dbversion = db.h.version;
 288     header.created = htonl(curtime);
 289     strcpy(header.cell, "");
 290     header.lastDumpId = db.h.lastDumpId;
 291     header.lastInstanceId = db.h.lastInstanceId;
 292     header.lastTapeId = db.h.lastTapeId;
 293
 294     tcode = writeStructHeader(fid, SD_DBHEADER);
 295     if (tcode)
 296         ERROR(tcode);
 297
 298     if (canWrite(fid) <= 0)
 299         ERROR(BUDB_DUMPFAILED);
 300
 301     if (write(fid, &header, sizeof(header)) != sizeof(header))
 302         ERROR(BUDB_DUMPFAILED);
 303
 304     haveWritten(sizeof(header));
 305
 306   error_exit:
 307     return (code);
 308 }
 309
 310 /* writeDump
 311  *      write out a dump entry structure
 312  */
 313
 314 afs_int32
 315 writeDump(int fid, dbDumpP dumpPtr)
 316 {
 317     struct budb_dumpEntry dumpEntry;
 318     afs_int32 code = 0, tcode;
 319
 320     tcode = dumpToBudbDump(dumpPtr, &dumpEntry);
 321     if (tcode)
 322         ERROR(tcode);
 323
 324     writeStructHeader(fid, SD_DUMP);
 325
 326     if (canWrite(fid) <= 0)
 327         ERROR(BUDB_DUMPFAILED);
 328
 329     if (write(fid, &dumpEntry, sizeof(dumpEntry)) != sizeof(dumpEntry))
 330         ERROR(BUDB_DUMPFAILED);
 331     haveWritten(sizeof(dumpEntry));
 332
 333   error_exit:
 334     return (code);
 335 }
 336
 337 afs_int32
 338 writeTape(int fid, struct tape *tapePtr, afs_int32 dumpid)
 339 {
 340     struct budb_tapeEntry tapeEntry;
 341     afs_int32 code = 0, tcode;
 342
 343     tcode = writeStructHeader(fid, SD_TAPE);
 344     if (tcode)
 345         ERROR(tcode);
 346
 347     tapeToBudbTape(tapePtr, &tapeEntry);
 348
 349     tapeEntry.dump = htonl(dumpid);
 350
 351     if (canWrite(fid) <= 0)
 352         ERROR(BUDB_DUMPFAILED);
 353
 354     if (write(fid, &tapeEntry, sizeof(tapeEntry)) != sizeof(tapeEntry))
 355         ERROR(BUDB_DUMPFAILED);
 356
 357     haveWritten(sizeof(tapeEntry));
 358
 359   error_exit:
 360     return (code);
 361 }
 362
 363 /* combines volFragment and volInfo */
 364
 365 afs_int32
 366 writeVolume(struct ubik_trans *ut, int fid, struct volFragment *volFragmentPtr,
 367             struct volInfo *volInfoPtr, afs_int32 dumpid, char *tapeName)
 368 {
 369     struct budb_volumeEntry budbVolume;
 370     afs_int32 code = 0;
 371
 372     volsToBudbVol(volFragmentPtr, volInfoPtr, &budbVolume);
 373
 374     budbVolume.dump = htonl(dumpid);
 375     strcpy(budbVolume.tape, tapeName);
 376
 377     writeStructHeader(fid, SD_VOLUME);
 378
 379     if (canWrite(fid) <= 0)
 380         ERROR(BUDB_DUMPFAILED);
 381
 382     if (write(fid, &budbVolume, sizeof(budbVolume)) != sizeof(budbVolume))
 383         ERROR(BUDB_DUMPFAILED);
 384
 385     haveWritten(sizeof(budbVolume));
 386
 387   error_exit:
 388     return (code);
 389 }
 390
 391 /* -------------------
 392  * handlers for the text blocks
 393  * -------------------
 394  */
 395
 396 /* checkLock
 397  *      make sure a text lock is NOT held
 398  * exit:
 399  *      0 - not held
 400  *      n - error
 401  */
 402
 403 afs_int32
 404 checkLock(afs_int32 textType)
 405 {
 406     db_lockP lockPtr;
 407
 408     if ((textType < 0) || (textType > TB_NUM - 1))
 409         return (BUDB_BADARGUMENT);
 410
 411     lockPtr = &db.h.textLocks[textType];
 412
 413     if (lockPtr->lockState != 0)
 414         return (BUDB_LOCKED);
 415     return (0);
 416 }
 417
 418 /* checkText
 419  *      check the integrity of the specified text type
 420  */
 421
 422 int
 423 checkText(struct ubik_trans *ut, afs_int32 textType)
 424 {
 425     struct textBlock *tbPtr;
 426     afs_int32 nBytes = 0;       /* accumulated actual size */
 427     afs_int32 size;
 428     struct block block;
 429     dbadr blockAddr;
 430
 431     afs_int32 code = 0;
 432
 433     tbPtr = &db.h.textBlock[textType];
 434     blockAddr = ntohl(tbPtr->textAddr);
 435     size = ntohl(tbPtr->size);
 436
 437     while (blockAddr != 0) {
 438         /* read the block */
 439         code =
 440             cdbread(ut, text_BLOCK, blockAddr, (char *)&block, sizeof(block));
 441         if (code)
 442             ERROR(code);
 443
 444         /* check its type */
 445         if (block.h.type != text_BLOCK)
 446             ERROR(BUDB_DATABASEINCONSISTENT);
 447
 448         /* add up the size */
 449         nBytes += BLOCK_DATA_SIZE;
 450
 451         blockAddr = ntohl(block.h.next);
 452     }
 453
 454     /* ensure that we have at least the expected amount of text */
 455     if (nBytes < size)
 456         ERROR(BUDB_DATABASEINCONSISTENT);
 457
 458   error_exit:
 459     return (code);
 460 }
 461
 462 /* writeText
 463  * entry:
 464  *      textType - type of text block, e.g. TB_DUMPSCHEDULE
 465  */
 466
 467 afs_int32
 468 writeText(struct ubik_trans *ut, int fid, int textType)
 469 {
 470     struct textBlock *tbPtr;
 471     afs_int32 textSize, writeSize;
 472     dbadr dbAddr;
 473     struct block block;
 474     afs_int32 code = 0;
 475
 476     /* check lock is free */
 477     code = checkLock(textType);
 478     if (code)
 479         ERROR(code);
 480
 481     /* ensure that this block has the correct type */
 482     code = checkText(ut, textType);
 483     if (code) {
 484         LogError(0, "writeText: text type %d damaged\n", textType);
 485         ERROR(code);
 486     }
 487
 488     tbPtr = &db.h.textBlock[textType];
 489     textSize = ntohl(tbPtr->size);
 490     dbAddr = ntohl(tbPtr->textAddr);
 491
 492     if (!dbAddr)
 493         goto error_exit;        /* Don't save anything if no blocks */
 494
 495     writeTextHeader(fid, textType);
 496
 497     while (dbAddr) {
 498         code = cdbread(ut, text_BLOCK, dbAddr, (char *)&block, sizeof(block));
 499         if (code)
 500             ERROR(code);
 501
 502         writeSize = min(textSize, BLOCK_DATA_SIZE);
 503         if (!writeSize)
 504             break;
 505
 506         if (canWrite(fid) <= 0)
 507             ERROR(BUDB_DUMPFAILED);
 508
 509         if (write(fid, &block.a[0], writeSize) != writeSize)
 510             ERROR(BUDB_IO);
 511
 512         haveWritten(writeSize);
 513         textSize -= writeSize;
 514
 515         dbAddr = ntohl(block.h.next);
 516     }
 517
 518   error_exit:
 519     return (code);
 520 }
 521
 522 #define MAXAPPENDS 200
 523
 524 afs_int32
 525 writeDatabase(struct ubik_trans *ut, int fid)
 526 {
 527     dbadr dbAddr, dbAppAddr;
 528     struct dump diskDump, apDiskDump;
 529     dbadr tapeAddr;
 530     struct tape diskTape;
 531     dbadr volFragAddr;
 532     struct volFragment diskVolFragment;
 533     struct volInfo diskVolInfo;
 534     int length, hash;
 535     int old = 0;
 536     int entrySize;
 537     afs_int32 code = 0, tcode;
 538     afs_int32 appDumpAddrs[MAXAPPENDS], numaddrs, appcount, j;
 539
 540     struct memoryHashTable *mht;
 541
 542     LogDebug(4, "writeDatabase:\n");
 543
 544     /* write out a header identifying this database etc */
 545     tcode = writeDbHeader(fid);
 546     if (tcode) {
 547         LogError(tcode, "writeDatabase: Can't write Header\n");
 548         ERROR(tcode);
 549     }
 550
 551     /* write out the tree of dump structures */
 552
 553     mht = ht_GetType(HT_dumpIden_FUNCTION, &entrySize);
 554     if (!mht) {
 555         LogError(tcode, "writeDatabase: Can't get dump type\n");
 556         ERROR(BUDB_BADARGUMENT);
 557     }
 558
 559     for (old = 0; old <= 1; old++) {
 560         /*oldnew */
 561         /* only two states, old or not old */
 562         length = (old ? mht->oldLength : mht->length);
 563         if (!length)
 564             continue;
 565
 566         for (hash = 0; hash < length; hash++) {
 567             /*hashBuckets */
 568             /* dump all the dumps in this hash bucket
 569              */
 570             for (dbAddr = ht_LookupBucket(ut, mht, hash, old); dbAddr; dbAddr = ntohl(diskDump.idHashChain)) {  /*initialDumps */
 571                 /* now check if this dump had any errors/inconsistencies.
 572                  * If so, don't dump it
 573                  */
 574                 if (badEntry(dbAddr)) {
 575                     LogError(0,
 576                              "writeDatabase: Damaged dump entry at addr 0x%x\n",
 577                              dbAddr);
 578                     Log("     Skipping remainder of dumps on hash chain %d\n",
 579                         hash);
 580                     break;
 581                 }
 582
 583                 tcode =
 584                     cdbread(ut, dump_BLOCK, dbAddr, &diskDump,
 585                             sizeof(diskDump));
 586                 if (tcode) {
 587                     LogError(tcode,
 588                              "writeDatabase: Can't read dump entry (addr 0x%x)\n",
 589                              dbAddr);
 590                     Log("     Skipping remainder of dumps on hash chain %d\n",
 591                         hash);
 592                     break;
 593                 }
 594
 595                 /* Skip appended dumps, only start with initial dumps */
 596                 if (diskDump.initialDumpID != 0)
 597                     continue;
 598
 599                 /* Skip appended dumps, only start with initial dumps. Then
 600                  * follow the appended dump chain so they are in order for restore.
 601                  */
 602                 appcount = numaddrs = 0;
 603                 for (dbAppAddr = dbAddr; dbAppAddr;
 604                      dbAppAddr = ntohl(apDiskDump.appendedDumpChain)) {
 605                     /*appendedDumps */
 606                     /* Check to see if we have a circular loop of appended dumps */
 607                     for (j = 0; j < numaddrs; j++) {
 608                         if (appDumpAddrs[j] == dbAppAddr)
 609                             break;      /* circular loop */
 610                     }
 611                     if (j < numaddrs) { /* circular loop */
 612                         Log("writeDatabase: Circular loop found in appended dumps\n");
 613                         Log("Skipping rest of appended dumps of dumpID %u\n",
 614                             ntohl(diskDump.id));
 615                         break;
 616                     }
 617                     if (numaddrs >= MAXAPPENDS)
 618                         numaddrs = MAXAPPENDS - 1;      /* don't overflow */
 619                     appDumpAddrs[numaddrs] = dbAppAddr;
 620                     numaddrs++;
 621
 622                     /* If we dump a 1000 appended dumps, assume a loop */
 623                     if (appcount >= 5 * MAXAPPENDS) {
 624                         Log("writeDatabase: Potential circular loop of appended dumps\n");
 625                         Log("Skipping rest of appended dumps of dumpID %u. Dumped %d\n", ntohl(diskDump.id), appcount);
 626                         break;
 627                     }
 628                     appcount++;
 629
 630                     /* Read the dump entry */
 631                     if (dbAddr == dbAppAddr) {
 632                         /* First time through, don't need to read the dump entry again */
 633                         memcpy(&apDiskDump, &diskDump, sizeof(diskDump));
 634                     } else {
 635                         if (badEntry(dbAppAddr)) {
 636                             LogError(0,
 637                                      "writeDatabase: Damaged appended dump entry at addr 0x%x\n",
 638                                      dbAddr);
 639                             Log("     Skipping this and remainder of appended dumps of initial DumpID %u\n", ntohl(diskDump.id));
 640                             break;
 641                         }
 642
 643                         tcode =
 644                             cdbread(ut, dump_BLOCK, dbAppAddr, &apDiskDump,
 645                                     sizeof(apDiskDump));
 646                         if (tcode) {
 647                             LogError(tcode,
 648                                      "writeDatabase: Can't read appended dump entry (addr 0x%x)\n",
 649                                      dbAppAddr);
 650                             Log("     Skipping this and remainder of appended dumps of initial DumpID %u\n", ntohl(diskDump.id));
 651                             break;
 652                         }
 653
 654                         /* Verify that this appended dump points to the initial dump */
 655                         if (ntohl(apDiskDump.initialDumpID) !=
 656                             ntohl(diskDump.id)) {
 657                             LogError(0,
 658                                      "writeDatabase: Appended dumpID %u does not reference initial dumpID %u\n",
 659                                      ntohl(apDiskDump.id),
 660                                      ntohl(diskDump.id));
 661                             Log("     Skipping this appended dump\n");
 662                             continue;
 663                         }
 664                     }
 665
 666                     /* Save the dump entry */
 667                     tcode = writeDump(fid, &apDiskDump);
 668                     if (tcode) {
 669                         LogError(tcode,
 670                                  "writeDatabase: Can't write dump entry\n");
 671                         ERROR(tcode);
 672                     }
 673
 674                     /* For each tape on this dump
 675                      */
 676                     for (tapeAddr = ntohl(apDiskDump.firstTape); tapeAddr; tapeAddr = ntohl(diskTape.nextTape)) {       /*tapes */
 677                         /* read the tape entry */
 678                         tcode =
 679                             cdbread(ut, tape_BLOCK, tapeAddr, &diskTape,
 680                                     sizeof(diskTape));
 681                         if (tcode) {
 682                             LogError(tcode,
 683                                      "writeDatabase: Can't read tape entry (addr 0x%x) of dumpID %u\n",
 684                                      tapeAddr, ntohl(apDiskDump.id));
 685                             Log("     Skipping this and remaining tapes in the dump (and all their volumes)\n");
 686                             break;
 687                         }
 688
 689                         /* Save the tape entry */
 690                         tcode =
 691                             writeTape(fid, &diskTape, ntohl(apDiskDump.id));
 692                         if (tcode) {
 693                             LogError(tcode,
 694                                      "writeDatabase: Can't write tape entry\n");
 695                             ERROR(tcode);
 696                         }
 697
 698                         /* For each volume on this tape.
 699                          */
 700                         for (volFragAddr = ntohl(diskTape.firstVol); volFragAddr; volFragAddr = ntohl(diskVolFragment.sameTapeChain)) { /*volumes */
 701                             /* Read the volume Fragment entry */
 702                             tcode =
 703                                 cdbread(ut, volFragment_BLOCK, volFragAddr,
 704                                         &diskVolFragment,
 705                                         sizeof(diskVolFragment));
 706                             if (tcode) {
 707                                 LogError(tcode,
 708                                          "writeDatabase: Can't read volfrag entry (addr 0x%x) of dumpID %u\n",
 709                                          volFragAddr, ntohl(apDiskDump.id));
 710                                 Log("     Skipping this and remaining volumes on tape '%s'\n", diskTape.name);
 711                                 break;
 712                             }
 713
 714                             /* Read the volume Info entry */
 715                             tcode =
 716                                 cdbread(ut, volInfo_BLOCK,
 717                                         ntohl(diskVolFragment.vol),
 718                                         &diskVolInfo, sizeof(diskVolInfo));
 719                             if (tcode) {
 720                                 LogError(tcode,
 721                                          "writeDatabase: Can't read volinfo entry (addr 0x%x) of dumpID %u\n",
 722                                          ntohl(diskVolFragment.vol),
 723                                          ntohl(apDiskDump.id));
 724                                 Log("     Skipping volume on tape '%s'\n",
 725                                     diskTape.name);
 726                                 continue;
 727                             }
 728
 729                             /* Save the volume entry */
 730                             tcode =
 731                                 writeVolume(ut, fid, &diskVolFragment,
 732                                             &diskVolInfo,
 733                                             ntohl(apDiskDump.id),
 734                                             diskTape.name);
 735                             if (tcode) {
 736                                 LogError(tcode,
 737                                          "writeDatabase: Can't write volume entry\n");
 738                                 ERROR(tcode);
 739                             }
 740                         }       /*volumes */
 741                     }           /*tapes */
 742                 }               /*appendedDumps */
 743             }                   /*initialDumps */
 744         }                       /*hashBuckets */
 745     }                           /*oldnew */
 746
 747     /* write out the textual configuration information */
 748     tcode = writeText(ut, fid, TB_DUMPSCHEDULE);
 749     if (tcode) {
 750         LogError(tcode, "writeDatabase: Can't write dump schedule\n");
 751         ERROR(tcode);
 752     }
 753     tcode = writeText(ut, fid, TB_VOLUMESET);
 754     if (tcode) {
 755         LogError(tcode, "writeDatabase: Can't write volume set\n");
 756         ERROR(tcode);
 757     }
 758     tcode = writeText(ut, fid, TB_TAPEHOSTS);
 759     if (tcode) {
 760         LogError(tcode, "writeDatabase: Can't write tape hosts\n");
 761         ERROR(tcode);
 762     }
 763
 764     tcode = writeStructHeader(fid, SD_END);
 765     if (tcode) {
 766         LogError(tcode, "writeDatabase: Can't write end savedb\n");
 767         ERROR(tcode);
 768     }
 769
 770   error_exit:
 771     doneWriting(code);
 772     return (code);
 773 }
 774
 775
 776 #ifdef notdef
 777
 778 afs_int32
 779 canWrite(int fid)
 780 {
 781     afs_int32 in, out, except;
 782     struct timeval tp;
 783     afs_int32 code;
 784
 785     tp.tv_sec = 0;
 786     tp.tv_usec = 0;
 787
 788     out = (1 << fid);
 789     in = 0;
 790     except = 0;
 791
 792     code = IOMGR_Select(32, &in, &out, &except, &tp);
 793     return (code);
 794 }
 795
 796 #endif /* notdef */