src/vol/partition.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  * Portions Copyright (c) 2003 Apple Computer, Inc.
  10  * Portions Copyright (c) 2006 Sine Nomine Associates
  11  */
  12
  13 /*
  14
  15         System:         VICE-TWO
  16         Module:         partition.c
  17         Institution:    The Information Technology Center, Carnegie-Mellon University
  18
  19  */
  20
  21 #include <afsconfig.h>
  22 #include <afs/param.h>
  23
  24 #include <roken.h>
  25
  26 #include <ctype.h>
  27
  28 #ifdef AFS_NT40_ENV
  29 #include <windows.h>
  30 #include <winbase.h>
  31 #include <winioctl.h>
  32 #else
  33
  34 #if AFS_HAVE_STATVFS || AFS_HAVE_STATVFS64
  35 #include <sys/statvfs.h>
  36 #endif /* AFS_HAVE_STATVFS */
  37 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
  38 #include <sys/mount.h>
  39 #endif
  40
  41 #if !defined(AFS_SGI_ENV)
  42 #ifdef  AFS_OSF_ENV
  43 #include <sys/mount.h>
  44 #include <ufs/fs.h>
  45 #else /* AFS_OSF_ENV */
  46 #ifdef AFS_VFSINCL_ENV
  47 #define VFS
  48 #ifdef  AFS_SUN5_ENV
  49 #include <sys/fs/ufs_fs.h>
  50 #else
  51 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
  52 #include <ufs/ufs/dinode.h>
  53 #include <ufs/ffs/fs.h>
  54 #else
  55 #include <ufs/fs.h>
  56 #endif
  57 #endif
  58 #else /* AFS_VFSINCL_ENV */
  59 #if !defined(AFS_AIX_ENV) && !defined(AFS_LINUX22_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_XBSD_ENV)
  60 #include <sys/fs.h>
  61 #endif
  62 #endif /* AFS_VFSINCL_ENV */
  63 #endif /* AFS_OSF_ENV */
  64 #include <sys/file.h>
  65 #ifdef  AFS_AIX_ENV
  66 #include <sys/vfs.h>
  67 #include <sys/lockf.h>
  68 #else
  69 #ifdef  AFS_HPUX_ENV
  70 #include <sys/vfs.h>
  71 #include <checklist.h>
  72 #else
  73 #if     defined(AFS_SUN_ENV)
  74 #include <sys/vfs.h>
  75 #ifndef AFS_SUN5_ENV
  76 #include <mntent.h>
  77 #endif
  78 #endif
  79 #ifdef AFS_SUN5_ENV
  80 #include <sys/mnttab.h>
  81 #include <sys/mntent.h>
  82 #else
  83 #ifdef AFS_LINUX22_ENV
  84 #include <mntent.h>
  85 #include <sys/statfs.h>
  86 #else
  87 #include <fstab.h>
  88 #endif
  89 #endif
  90 #endif
  91 #endif
  92 #endif /* AFS_SGI_ENV */
  93 #endif /* AFS_NT40_ENV */
  94 #if defined(AFS_SGI_ENV)
  95 #include <sys/file.h>
  96 #include <mntent.h>
  97 #endif
  98
  99 #include <afs/opr.h>
 100 #ifdef AFS_PTHREAD_ENV
 101 # include <opr/lock.h>
 102 #endif
 103 #include <afs/afsint.h>
 104 #include <rx/rx_queue.h>
 105 #include "nfs.h"
 106 #include <afs/errors.h>
 107 #include "lock.h"
 108 #include "lwp.h"
 109 #include <afs/afssyscalls.h>
 110 #include "ihandle.h"
 111 #include "common.h"
 112 #ifdef AFS_NAMEI_ENV
 113 #ifdef AFS_NT40_ENV
 114 #include "ntops.h"
 115 #else
 116 #include "namei_ops.h"
 117 #endif /* AFS_NT40_ENV */
 118 #endif /* AFS_NAMEI_ENV */
 119 #include "vnode.h"
 120 #include "volume.h"
 121 #include "partition.h"
 122
 123 #if defined(AFS_HPUX_ENV)
 124 #include <sys/privgrp.h>
 125 #endif /* defined(AFS_HPUX_ENV) */
 126
 127 #ifdef AFS_AIX42_ENV
 128 #include <jfs/filsys.h>
 129 #endif
 130
 131 #ifdef AFS_NT40_ENV
 132 extern int VValidVPTEntry(struct vptab *vptp);
 133 #endif
 134
 135 int aixlow_water = 8;           /* default 8% */
 136 struct DiskPartition64 *DiskPartitionList;
 137
 138 #ifdef AFS_DEMAND_ATTACH_FS
 139 /* file to lock to conceptually "lock" the vol headers on a partition */
 140 #define AFS_PARTLOCK_FILE ".volheaders.lock"
 141 #define AFS_VOLUMELOCK_FILE ".volume.lock"
 142
 143 static struct DiskPartition64 *DiskPartitionTable[VOLMAXPARTS+1];
 144
 145 static struct DiskPartition64 * VLookupPartition_r(char * path);
 146 static void AddPartitionToTable_r(struct DiskPartition64 *);
 147 #endif /* AFS_DEMAND_ATTACH_FS */
 148
 149 #ifdef AFS_SGI_XFS_IOPS_ENV
 150 /* Verify that the on disk XFS inodes on the partition are large enough to
 151  * hold the AFS attribute. Returns -1 if the attribute can't be set or is
 152  * too small to fit in the inode. Returns 0 if the attribute does fit in
 153  * the XFS inode.
 154  */
 155 #include <afs/xfsattrs.h>
 156 static int
 157 VerifyXFSInodeSize(char *part, char *fstype)
 158 {
 159     afs_xfs_attr_t junk;
 160     int length = SIZEOF_XFS_ATTR_T;
 161     int fd = 0;
 162     int code = -1;
 163     struct fsxattr fsx;
 164
 165     if (strcmp("xfs", fstype))
 166         return 0;
 167
 168     if (attr_set(part, AFS_XFS_ATTR, &junk, length, ATTR_ROOT) == 0) {
 169         if (((fd = open(part, O_RDONLY, 0)) != -1)
 170             && (fcntl(fd, F_FSGETXATTRA, &fsx) == 0)) {
 171
 172             if (fsx.fsx_nextents) {
 173                 Log("Partition %s: XFS inodes too small, exiting.\n", part);
 174                 Log("Run xfs_size_check utility and remake partitions.\n");
 175             } else
 176                 code = 0;
 177         }
 178
 179         if (fd > 0)
 180             close(fd);
 181         (void)attr_remove(part, AFS_XFS_ATTR, ATTR_ROOT);
 182     }
 183     return code;
 184 }
 185 #endif /* AFS_SGI_XFS_IOPS_ENV */
 186
 187 int
 188 VInitPartitionPackage(void)
 189 {
 190 #ifdef AFS_DEMAND_ATTACH_FS
 191     memset(&DiskPartitionTable, 0, sizeof(DiskPartitionTable));
 192 #endif /* AFS_DEMAND_ATTACH_FS */
 193     return 0;
 194 }
 195
 196 static void
 197 VInitPartition_r(char *path, char *devname, Device dev)
 198 {
 199     struct DiskPartition64 *dp, *op;
 200
 201     dp = malloc(sizeof(struct DiskPartition64));
 202     /* Add it to the end, to preserve order when we print statistics */
 203     for (op = DiskPartitionList; op; op = op->next) {
 204         if (!op->next)
 205             break;
 206     }
 207     if (op)
 208         op->next = dp;
 209     else
 210         DiskPartitionList = dp;
 211     dp->next = 0;
 212     dp->name = strdup(path);
 213     dp->index = volutil_GetPartitionID(path);
 214 #if defined(AFS_NAMEI_ENV) && !defined(AFS_NT40_ENV)
 215     /* Create a lockfile for the partition, of the form /vicepa/Lock/vicepa */
 216     dp->devName = malloc(2 * strlen(path) + 6);
 217     strcpy(dp->devName, path);
 218     strcat(dp->devName, OS_DIRSEP);
 219     strcat(dp->devName, "Lock");
 220     mkdir(dp->devName, 0700);
 221     strcat(dp->devName, path);
 222     close(afs_open(dp->devName, O_RDWR | O_CREAT, 0600));
 223     dp->device = dp->index;
 224 #else
 225     dp->devName = strdup(devname);
 226     dp->device = dev;
 227 #endif
 228     dp->lock_fd = INVALID_FD;
 229     dp->flags = 0;
 230     dp->f_files = 1;            /* just a default value */
 231 #if defined(AFS_NAMEI_ENV) && !defined(AFS_NT40_ENV)
 232     if (programType == fileServer)
 233         (void)namei_ViceREADME(VPartitionPath(dp));
 234 #endif
 235     VSetPartitionDiskUsage_r(dp);
 236 #ifdef AFS_DEMAND_ATTACH_FS
 237     AddPartitionToTable_r(dp);
 238     queue_Init(&dp->vol_list.head);
 239     CV_INIT(&dp->vol_list.cv, "vol list", CV_DEFAULT, 0);
 240     dp->vol_list.len = 0;
 241     dp->vol_list.busy = 0;
 242     {
 243         char lockpath[MAXPATHLEN+1];
 244         snprintf(lockpath, MAXPATHLEN, "%s/" AFS_PARTLOCK_FILE, dp->name);
 245         lockpath[MAXPATHLEN] = '\0';
 246         VLockFileInit(&dp->headerLockFile, lockpath);
 247
 248         snprintf(lockpath, MAXPATHLEN, "%s/" AFS_VOLUMELOCK_FILE, dp->name);
 249         lockpath[MAXPATHLEN] = '\0';
 250         VLockFileInit(&dp->volLockFile, lockpath);
 251     }
 252     VDiskLockInit(&dp->headerLock, &dp->headerLockFile, 1);
 253 #endif /* AFS_DEMAND_ATTACH_FS */
 254 }
 255
 256 static void
 257 VInitPartition(char *path, char *devname, Device dev)
 258 {
 259     VOL_LOCK;
 260     VInitPartition_r(path, devname, dev);
 261     VOL_UNLOCK;
 262 }
 263
 264 #ifndef AFS_NT40_ENV
 265 /* VAttachPartitions() finds the vice partitions on this server. Calls
 266  * VCheckPartition() to do some basic checks on the partition. If the partition
 267  * is a valid vice partition, VCheckPartition will add it to the DiskPartition
 268  * list.
 269  * Returns the number of errors returned by VCheckPartition. An error in
 270  * VCheckPartition means that partition is a valid vice partition but the
 271  * fileserver should not start because of the error found on that partition.
 272  *
 273  * AFS_NAMEI_ENV
 274  * No specific user space file system checks, since we don't know what
 275  * is being used for vice partitions.
 276  *
 277  * Use partition name as devname.
 278  */
 279 static int
 280 VCheckPartition(char *part, char *devname, int logging)
 281 {
 282     struct afs_stat_st status;
 283 #if !defined(AFS_LINUX20_ENV) && !defined(AFS_NT40_ENV)
 284     char AFSIDatPath[MAXPATHLEN];
 285 #endif
 286
 287     /* Only keep track of "/vicepx" partitions since it can get hairy
 288      * when NFS mounts are involved.. */
 289     if (strncmp(part, VICE_PARTITION_PREFIX, VICE_PREFIX_SIZE)) {
 290         return 0;
 291     }
 292     if (volutil_GetPartitionID(part) == -1) {
 293         Log("Warning: %s is a bad partition name; ignored.\n", part);
 294         return 0;
 295     }
 296     if (afs_stat(part, &status) < 0) {
 297         Log("VInitVnodes: Couldn't find file system %s; ignored\n", part);
 298         return 0;
 299     }
 300     if (logging) {
 301         Log("This program is compiled without AFS_NAMEI_ENV, and "
 302             "partition %s is mounted with the 'logging' option. "
 303             "Using the inode fileserver backend with 'logging' UFS "
 304             "partitions causes volume corruption, so please either "
 305             "mount the partition without logging, or use the namei "
 306             "fileserver backend. Aborting...\n", part);
 307         return -1;
 308     }
 309 #ifndef AFS_AIX32_ENV
 310     if (programType == fileServer) {
 311         char salvpath[MAXPATHLEN];
 312         strcpy(salvpath, part);
 313         strcat(salvpath, "/FORCESALVAGE");
 314         if (afs_stat(salvpath, &status) == 0) {
 315             Log("VInitVnodes: Found %s; aborting\n", salvpath);
 316             return -1;
 317         }
 318     }
 319 #endif
 320
 321 #if !defined(AFS_LINUX20_ENV) && !defined(AFS_NT40_ENV)
 322     strcpy(AFSIDatPath, part);
 323     strcat(AFSIDatPath, "/AFSIDat");
 324 #ifdef AFS_NAMEI_ENV
 325     if (afs_stat(AFSIDatPath, &status) < 0) {
 326         DIR *dirp;
 327         struct dirent *dp;
 328
 329         dirp = opendir(part);
 330         opr_Assert(dirp);
 331         while ((dp = readdir(dirp))) {
 332             if (dp->d_name[0] == 'V') {
 333                 Log("This program is compiled with AFS_NAMEI_ENV, but partition %s seems to contain volumes which don't use the namei-interface; aborting\n", part);
 334                 closedir(dirp);
 335                 return -1;
 336             }
 337         }
 338         closedir(dirp);
 339     }
 340 #else /* AFS_NAMEI_ENV */
 341     if (afs_stat(AFSIDatPath, &status) == 0) {
 342         Log("This program is compiled without AFS_NAMEI_ENV, but partition %s seems to contain volumes which use the namei-interface; aborting\n", part);
 343         return -1;
 344     }
 345
 346 #ifdef AFS_SGI_XFS_IOPS_ENV
 347     if (VerifyXFSInodeSize(part, status.st_fstype) < 0)
 348         return -1;
 349 #endif
 350 #endif /* AFS_NAMEI_ENV */
 351 #endif /* !AFS_LINUX20_ENV && !AFS_NT40_ENV */
 352
 353 #if defined(AFS_DUX40_ENV) && !defined(AFS_NAMEI_ENV)
 354     if (status.st_ino != ROOTINO) {
 355         Log("%s is not a mounted file system; ignored.\n", part);
 356         return 0;
 357     }
 358 #endif
 359
 360     VInitPartition(part, devname, status.st_dev);
 361
 362     return 0;
 363 }
 364
 365 /* VIsAlwaysAttach() checks whether a /vicepX directory should always be
 366  * attached (return value 1), or only attached when it is a separately
 367  * mounted partition (return value 0).  For non-NAMEI environments, it
 368  * always returns 0.
 369  *
 370  * *awouldattach will be set to 1 if the given path at least looks like a vice
 371  * partition (that is, if we return 0, the only thing preventing this partition
 372  * from being attached is the existence of the AlwaysAttach file), or to 0
 373  * otherwise. *awouldattach is set regardless of whether or not the partition
 374  * should always be attached or not.
 375  */
 376 static int
 377 VIsAlwaysAttach(char *part, int *awouldattach)
 378 {
 379 #ifdef AFS_NAMEI_ENV
 380     struct afs_stat_st st;
 381     char checkfile[256];
 382     int ret;
 383 #endif /* AFS_NAMEI_ENV */
 384
 385     if (awouldattach) {
 386         *awouldattach = 0;
 387     }
 388
 389 #ifdef AFS_NAMEI_ENV
 390     if (strncmp(part, VICE_PARTITION_PREFIX, VICE_PREFIX_SIZE))
 391         return 0;
 392
 393     if (awouldattach) {
 394         *awouldattach = 1;
 395     }
 396
 397     strncpy(checkfile, part, 100);
 398     strcat(checkfile, OS_DIRSEP);
 399     strcat(checkfile, VICE_ALWAYSATTACH_FILE);
 400
 401     ret = afs_stat(checkfile, &st);
 402     return (ret < 0) ? 0 : 1;
 403 #else /* AFS_NAMEI_ENV */
 404     return 0;
 405 #endif /* AFS_NAMEI_ENV */
 406 }
 407
 408 /* VIsNeverAttach() checks whether a /vicepX directory should never be
 409  * attached (return value 1), or follow the normal mounting logic. The
 410  * Always Attach flag may override the NeverAttach flag.
 411  */
 412 static int
 413 VIsNeverAttach(char *part)
 414 {
 415     struct afs_stat_st st;
 416     char checkfile[256];
 417     int ret;
 418
 419     if (strncmp(part, VICE_PARTITION_PREFIX, VICE_PREFIX_SIZE))
 420         return 0;
 421
 422     strncpy(checkfile, part, 100);
 423     strcat(checkfile, OS_DIRSEP);
 424     strcat(checkfile, VICE_NEVERATTACH_FILE);
 425
 426     ret = afs_stat(checkfile, &st);
 427     return (ret < 0) ? 0 : 1;
 428 }
 429
 430 /* VAttachPartitions2() looks for and attaches /vicepX partitions
 431  * where a special file (VICE_ALWAYSATTACH_FILE) exists.  This is
 432  * used to attach /vicepX directories which aren't on dedicated
 433  * partitions, in the NAMEI fileserver.
 434  */
 435 static void
 436 VAttachPartitions2(void)
 437 {
 438 #ifdef AFS_NAMEI_ENV
 439     DIR *dirp;
 440     struct dirent *de;
 441     char pname[32];
 442     int wouldattach;
 443
 444     dirp = opendir(OS_DIRSEP);
 445     while ((de = readdir(dirp))) {
 446         strcpy(pname, OS_DIRSEP);
 447         strncat(pname, de->d_name, 20);
 448         pname[sizeof(pname) - 1] = '\0';
 449
 450         /* Only keep track of "/vicepx" partitions since automounter
 451          * may hose us */
 452         if (VIsAlwaysAttach(pname, &wouldattach)) {
 453             VCheckPartition(pname, "", 0);
 454         } else {
 455             struct afs_stat_st st;
 456             if (wouldattach && VGetPartition(pname, 0) == NULL &&
 457                 afs_stat(pname, &st) == 0 && S_ISDIR(st.st_mode)) {
 458
 459                 /* This is a /vicep* dir, and it has not been attached as a
 460                  * partition. This probably means that this is a /vicep* dir
 461                  * that is not a separate partition, so just give a notice so
 462                  * admins are not confused as to why their /vicep* dirs are not
 463                  * being attached.
 464                  *
 465                  * It is possible that the dir _is_ a separate partition and we
 466                  * failed to attach it earlier, making this message a bit
 467                  * confusing. But that should be rare, and an error message
 468                  * about the failure will already be logged right before this,
 469                  * so it should be clear enough. */
 470
 471                 Log("VAttachPartitions: not attaching %s; either it is not a "
 472                     "separate partition, or it failed to attach (create the "
 473                     "file %s/" VICE_ALWAYSATTACH_FILE " to force attachment)\n",
 474                     pname, pname);
 475             }
 476         }
 477     }
 478     closedir(dirp);
 479 #endif /* AFS_NAMEI_ENV */
 480 }
 481 #endif /* AFS_NT40_ENV */
 482
 483 #ifdef AFS_SUN5_ENV
 484 int
 485 VAttachPartitions(void)
 486 {
 487     int errors = 0;
 488     struct mnttab mnt;
 489     FILE *mntfile;
 490
 491     if (!(mntfile = afs_fopen(MNTTAB, "r"))) {
 492         Log("Can't open %s\n", MNTTAB);
 493         perror(MNTTAB);
 494         exit(-1);
 495     }
 496     while (!getmntent(mntfile, &mnt)) {
 497         int logging = 0;
 498         /* Ignore non ufs or non read/write partitions */
 499         /* but allow zfs too if we're in the NAMEI environment */
 500         if (
 501 #ifdef AFS_NAMEI_ENV
 502             (((strcmp(mnt.mnt_fstype, "ufs") &&
 503                 strcmp(mnt.mnt_fstype, "zfs"))))
 504 #else
 505             (strcmp(mnt.mnt_fstype, "ufs") != 0)
 506 #endif
 507             || (strncmp(mnt.mnt_mntopts, "ro,ignore", 9) == 0))
 508             continue;
 509
 510         /* Skip this Partition? */
 511         if (VIsNeverAttach(mnt.mnt_mountp))
 512             continue;
 513
 514         /* If we're going to always attach this partition, do it later. */
 515         if (VIsAlwaysAttach(mnt.mnt_mountp, NULL))
 516             continue;
 517
 518 #ifndef AFS_NAMEI_ENV
 519         if (hasmntopt(&mnt, "logging") != NULL) {
 520             logging = 1;
 521         }
 522 #endif /* !AFS_NAMEI_ENV */
 523
 524         if (VCheckPartition(mnt.mnt_mountp, mnt.mnt_special, logging) < 0)
 525             errors++;
 526     }
 527
 528     (void)fclose(mntfile);
 529
 530     /* Process the always-attach partitions, if any. */
 531     VAttachPartitions2();
 532
 533     return errors;
 534 }
 535
 536 #endif /* AFS_SUN5_ENV */
 537 #if defined(AFS_SGI_ENV) || (defined(AFS_SUN_ENV) && !defined(AFS_SUN5_ENV)) || defined(AFS_HPUX_ENV)
 538 int
 539 VAttachPartitions(void)
 540 {
 541     int errors = 0;
 542     FILE *mfd;
 543     struct mntent *mntent;
 544
 545     if ((mfd = setmntent(MOUNTED, "r")) == NULL) {
 546         Log("Problems in getting mount entries(setmntent)\n");
 547         exit(-1);
 548     }
 549     while (mntent = getmntent(mfd)) {
 550         if (!hasmntopt(mntent, MNTOPT_RW))
 551             continue;
 552
 553         /* Skip this Partition? */
 554         if (VIsNeverAttach(mntent->mnt_dir))
 555             continue;
 556
 557         /* If we're going to always attach this partition, do it later. */
 558         if (VIsAlwaysAttach(mntent->mnt_dir, NULL))
 559             continue;
 560
 561         if (VCheckPartition(mntent->mnt_dir, mntent->mnt_fsname, 0) < 0)
 562             errors++;
 563     }
 564
 565     endmntent(mfd);
 566
 567     /* Process the always-attach partitions, if any. */
 568     VAttachPartitions2();
 569
 570     return errors;
 571 }
 572 #endif
 573 #ifdef AFS_AIX_ENV
 574 /*
 575  * (This function was grabbed from df.c)
 576  */
 577 int
 578 getmount(struct vmount **vmountpp)
 579 {
 580     int size;
 581     struct vmount *vm;
 582     int nmounts;
 583
 584     /* set initial size of mntctl buffer to a MAGIC NUMBER */
 585     size = BUFSIZ;
 586
 587     /* try the operation until ok or a fatal error */
 588     while (1) {
 589         if ((vm = malloc(size)) == NULL) {
 590             /* failed getting memory for mount status buf */
 591             perror("FATAL ERROR: get_stat malloc failed\n");
 592             exit(-1);
 593         }
 594
 595         /*
 596          * perform the QUERY mntctl - if it returns > 0, that is the
 597          * number of vmount structures in the buffer.  If it returns
 598          * -1, an error occured.  If it returned 0, then look in
 599          * first word of buffer for needed size.
 600          */
 601         if ((nmounts = mntctl(MCTL_QUERY, size, (caddr_t) vm)) > 0) {
 602             /* OK, got it, now return */
 603             *vmountpp = vm;
 604             return (nmounts);
 605
 606         } else if (nmounts == 0) {
 607             /* the buffer wasn't big enough .... */
 608             /* .... get required buffer size */
 609             size = *(int *)vm;
 610             free(vm);
 611
 612         } else {
 613             /* some other kind of error occurred */
 614             free(vm);
 615             return (-1);
 616         }
 617     }
 618 }
 619
 620 int
 621 VAttachPartitions(void)
 622 {
 623     int errors = 0;
 624     int nmounts;
 625     struct vmount *vmountp;
 626
 627     if ((nmounts = getmount(&vmountp)) <= 0) {
 628         Log("Problems in getting # of mount entries(getmount)\n");
 629         exit(-1);
 630     }
 631     for (; nmounts;
 632          nmounts--, vmountp =
 633          (struct vmount *)((int)vmountp + vmountp->vmt_length)) {
 634         char *part = vmt2dataptr(vmountp, VMT_STUB);
 635
 636         if (vmountp->vmt_flags & (MNT_READONLY | MNT_REMOVABLE | MNT_REMOTE))
 637             continue;           /* Ignore any "special" partitions */
 638
 639 #ifdef AFS_AIX42_ENV
 640 #ifndef AFS_NAMEI_ENV
 641         {
 642             struct superblock fs;
 643             /* The Log statements are non-sequiters in the SalvageLog and don't
 644              * even appear in the VolserLog, so restrict them to the FileLog.
 645              */
 646             if (ReadSuper(&fs, vmt2dataptr(vmountp, VMT_OBJECT)) < 0) {
 647                 if (programType == fileServer)
 648                     Log("Can't read superblock for %s, ignoring it.\n", part);
 649                 continue;
 650             }
 651             if (IsBigFilesFileSystem(&fs)) {
 652                 if (programType == fileServer)
 653                     Log("%s is a big files filesystem, ignoring it.\n", part);
 654                 continue;
 655             }
 656         }
 657 #endif
 658 #endif
 659
 660         /* Skip this Partition? */
 661         if (VIsNeverAttach(part))
 662             continue;
 663
 664         /* If we're going to always attach this partition, do it later. */
 665         if (VIsAlwaysAttach(part, NULL))
 666             continue;
 667
 668         if (VCheckPartition(part, vmt2dataptr(vmountp, VMT_OBJECT), 0) < 0)
 669             errors++;
 670     }
 671
 672     /* Process the always-attach partitions, if any. */
 673     VAttachPartitions2();
 674
 675     return errors;
 676 }
 677 #endif
 678 #if defined(AFS_DUX40_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
 679 int
 680 VAttachPartitions(void)
 681 {
 682     int errors = 0;
 683     struct fstab *fsent;
 684
 685     if (setfsent() < 0) {
 686         Log("Error listing filesystems.\n");
 687         exit(-1);
 688     }
 689
 690     while ((fsent = getfsent())) {
 691         if (strcmp(fsent->fs_type, "rw") != 0)
 692             continue;
 693
 694         /* Skip this Partition? */
 695         if (VIsNeverAttach(fsent->fs_file))
 696             continue;
 697
 698         /* If we're going to always attach this partition, do it later. */
 699         if (VIsAlwaysAttach(fsent->fs_file, NULL))
 700             continue;
 701
 702         if (VCheckPartition(fsent->fs_file, fsent->fs_spec, 0) < 0)
 703             errors++;
 704     }
 705     endfsent();
 706
 707     /* Process the always-attach partitions, if any. */
 708     VAttachPartitions2();
 709
 710     return errors;
 711 }
 712 #endif
 713
 714 #ifdef AFS_NT40_ENV
 715 /* VValidVPTEntry
 716  *
 717  * validate names in vptab.
 718  *
 719  * Return value:
 720  * 1 valid entry
 721  * 0 invalid entry
 722  */
 723
 724 static int
 725 VValidVPTEntry(struct vptab *vpe)
 726 {
 727     int len = strlen(vpe->vp_name);
 728     int i;
 729
 730     if (len < VICE_PREFIX_SIZE + 1 || len > VICE_PREFIX_SIZE + 2)
 731         return 0;
 732     if (strncmp(vpe->vp_name, VICE_PARTITION_PREFIX, VICE_PREFIX_SIZE))
 733         return 0;
 734
 735     for (i = VICE_PREFIX_SIZE; i < len; i++) {
 736         if (vpe->vp_name[i] < 'a' || vpe->vp_name[i] > 'z') {
 737             Log("Invalid partition name %s in registry, ignoring it.\n",
 738                 vpe->vp_name);
 739             return 0;
 740         }
 741     }
 742     if (len == VICE_PREFIX_SIZE + 2) {
 743         i = (int)(vpe->vp_name[VICE_PREFIX_SIZE] - 'a') * 26 +
 744             (int)(vpe->vp_name[VICE_PREFIX_SIZE + 1] - 'a');
 745         if (i > 255) {
 746             Log("Invalid partition name %s in registry, ignoring it.\n",
 747                 vpe->vp_name);
 748             return 0;
 749         }
 750     }
 751
 752     len = strlen(vpe->vp_dev);
 753     if (len != 2 || vpe->vp_dev[1] != ':' || vpe->vp_dev[0] < 'A'
 754         || vpe->vp_dev[0] > 'Z') {
 755         Log("Invalid device name %s in registry, ignoring it.\n",
 756             vpe->vp_dev);
 757         return 0;
 758     }
 759
 760     return 1;
 761 }
 762
 763 static int
 764 VCheckPartition(char *partName)
 765 {
 766     char volRoot[4];
 767     char volFsType[64];
 768     DWORD dwDummy;
 769     int err;
 770
 771     /* partName is presumed to be of the form "X:" */
 772     (void)sprintf(volRoot, "%c:\\", *partName);
 773
 774     if (!GetVolumeInformation(volRoot,  /* volume root directory */
 775                               NULL,     /* volume name buffer */
 776                               0,        /* volume name size */
 777                               NULL,     /* volume serial number */
 778                               &dwDummy, /* max component length */
 779                               &dwDummy, /* file system flags */
 780                               volFsType,        /* file system name */
 781                               sizeof(volFsType))) {
 782         err = GetLastError();
 783         Log("VCheckPartition: Failed to get partition information for %s, ignoring it.\n", partName);
 784         return -1;
 785     }
 786
 787     if (strcmp(volFsType, "NTFS")) {
 788         Log("VCheckPartition: Partition %s is not an NTFS partition, ignoring it.\n", partName);
 789         return -1;
 790     }
 791
 792     return 0;
 793 }
 794
 795
 796 int
 797 VAttachPartitions(void)
 798 {
 799     struct DiskPartition64 *partP, *prevP, *nextP;
 800     struct vpt_iter iter;
 801     struct vptab entry;
 802
 803     if (vpt_Start(&iter) < 0) {
 804         Log("No partitions to attach.\n");
 805         return 0;
 806     }
 807
 808     while (0 == vpt_NextEntry(&iter, &entry)) {
 809         if (!VValidVPTEntry(&entry)) {
 810             continue;
 811         }
 812
 813         /* This test for duplicates relies on the fact that the method
 814          * of storing the partition names in the NT registry means the same
 815          * partition name will never appear twice in the list.
 816          */
 817         for (partP = DiskPartitionList; partP; partP = partP->next) {
 818             if (*partP->devName == *entry.vp_dev) {
 819                 Log("Same drive (%s) used for both partition %s and partition %s, ignoring both.\n", entry.vp_dev, partP->name, entry.vp_name);
 820                 partP->flags = PART_DUPLICATE;
 821                 break;          /* Only one entry will ever be in this list. */
 822             }
 823         }
 824         if (partP)
 825             continue;           /* found a duplicate */
 826
 827         if (VCheckPartition(entry.vp_dev) < 0)
 828             continue;
 829         /* This test allows for manually inserting the FORCESALVAGE flag
 830          * and thereby invoking the salvager. scandisk obviously won't be
 831          * doing this for us.
 832          */
 833         if (programType == fileServer) {
 834             struct afs_stat_st status;
 835             char salvpath[MAXPATHLEN];
 836             strcpy(salvpath, entry.vp_dev);
 837             strcat(salvpath, "\\FORCESALVAGE");
 838             if (afs_stat(salvpath, &status) == 0) {
 839                 Log("VAttachPartitions: Found %s; aborting\n", salvpath);
 840                 exit(1);
 841             }
 842         }
 843         VInitPartition(entry.vp_name, entry.vp_dev, *entry.vp_dev - 'A');
 844     }
 845     vpt_Finish(&iter);
 846
 847     /* Run through partition list and clear out the dupes. */
 848     prevP = nextP = NULL;
 849     for (partP = DiskPartitionList; partP; partP = nextP) {
 850         nextP = partP->next;
 851         if (partP->flags == PART_DUPLICATE) {
 852             if (prevP)
 853                 prevP->next = partP->next;
 854             else
 855                 DiskPartitionList = partP->next;
 856             free(partP);
 857         } else
 858             prevP = partP;
 859     }
 860
 861     return 0;
 862 }
 863 #endif
 864
 865 #ifdef AFS_LINUX22_ENV
 866 int
 867 VAttachPartitions(void)
 868 {
 869     int errors = 0;
 870     FILE *mfd;
 871     struct mntent *mntent;
 872
 873     if ((mfd = setmntent("/proc/mounts", "r")) == NULL) {
 874         if ((mfd = setmntent("/etc/mtab", "r")) == NULL) {
 875             Log("Problems in getting mount entries(setmntent)\n");
 876             exit(-1);
 877         }
 878     }
 879     while ((mntent = getmntent(mfd))) {
 880         /* Skip this Partition? */
 881         if (VIsNeverAttach(mntent->mnt_dir))
 882             continue;
 883
 884         /* If we're going to always attach this partition, do it later. */
 885         if (VIsAlwaysAttach(mntent->mnt_dir, NULL))
 886             continue;
 887
 888         if (VCheckPartition(mntent->mnt_dir, mntent->mnt_fsname, 0) < 0)
 889             errors++;
 890     }
 891     endmntent(mfd);
 892
 893     /* Process the always-attach partitions, if any. */
 894     VAttachPartitions2();
 895
 896     return errors;
 897 }
 898 #endif /* AFS_LINUX22_ENV */
 899
 900 /* This routine is to be called whenever the actual name of the partition
 901  * is required. The canonical name is still in part->name.
 902  */
 903 char *
 904 VPartitionPath(struct DiskPartition64 *part)
 905 {
 906 #ifdef AFS_NT40_ENV
 907     return part->devName;
 908 #else
 909     return part->name;
 910 #endif
 911 }
 912
 913 /* get partition structure, abortp tells us if we should abort on failure */
 914 struct DiskPartition64 *
 915 VGetPartition_r(char *name, int abortp)
 916 {
 917     struct DiskPartition64 *dp;
 918 #ifdef AFS_DEMAND_ATTACH_FS
 919     dp = VLookupPartition_r(name);
 920 #else /* AFS_DEMAND_ATTACH_FS */
 921     for (dp = DiskPartitionList; dp; dp = dp->next) {
 922         if (strcmp(dp->name, name) == 0)
 923             break;
 924     }
 925 #endif /* AFS_DEMAND_ATTACH_FS */
 926     if (abortp)
 927         opr_Assert(dp != NULL);
 928     return dp;
 929 }
 930
 931 struct DiskPartition64 *
 932 VGetPartition(char *name, int abortp)
 933 {
 934     struct DiskPartition64 *retVal;
 935     VOL_LOCK;
 936     retVal = VGetPartition_r(name, abortp);
 937     VOL_UNLOCK;
 938     return retVal;
 939 }
 940
 941 #ifdef AFS_NT40_ENV
 942 void
 943 VSetPartitionDiskUsage_r(struct DiskPartition64 *dp)
 944 {
 945     ULARGE_INTEGER free_user, total, free_total;
 946     int ufree, tot, tfree;
 947
 948     if (!GetDiskFreeSpaceEx
 949         (VPartitionPath(dp), &free_user, &total, &free_total)) {
 950         printf("Failed to get disk space info for %s, error = %d\n", dp->name,
 951                GetLastError());
 952         return;
 953     }
 954
 955     /* Convert to 1K units. */
 956     ufree = (int)Int64ShraMod32(free_user.QuadPart, 10);
 957     tot = (int)Int64ShraMod32(total.QuadPart, 10);
 958     tfree = (int)Int64ShraMod32(free_total.QuadPart, 10);
 959
 960     dp->minFree = tfree - ufree;        /* only used in VPrintDiskStats_r */
 961     dp->totalUsable = tot;
 962     dp->free = tfree;
 963 }
 964
 965 #else
 966 void
 967 VSetPartitionDiskUsage_r(struct DiskPartition64 *dp)
 968 {
 969     int bsize, code;
 970     afs_int64 totalblks, free, used, availblks;
 971     int reserved;
 972 #ifdef afs_statvfs
 973     struct afs_statvfs statbuf;
 974 #else
 975     struct afs_statfs statbuf;
 976 #endif
 977
 978     if (dp->flags & PART_DONTUPDATE)
 979         return;
 980     /* Note:  we don't bother syncing because it's only an estimate, update
 981      * is syncing every 30 seconds anyway, we only have to keep the disk
 982      * approximately 10% from full--you just can't get the stuff in from
 983      * the net fast enough to worry */
 984 #ifdef afs_statvfs
 985     code = afs_statvfs(dp->name, &statbuf);
 986 #else
 987     code = afs_statfs(dp->name, &statbuf);
 988 #endif
 989     if (code < 0) {
 990         Log("statfs of %s failed in VSetPartitionDiskUsage (errno = %d)\n",
 991             dp->name, errno);
 992         return;
 993     }
 994     if (statbuf.f_blocks == -1) {       /* Undefined; skip stats.. */
 995         Log("statfs of %s failed in VSetPartitionDiskUsage\n", dp->name);
 996         return;
 997     }
 998     totalblks = statbuf.f_blocks;
 999     free = statbuf.f_bfree;
1000     reserved = free - statbuf.f_bavail;
1001 #ifdef afs_statvfs
1002     bsize = statbuf.f_frsize;
1003 #else
1004     bsize = statbuf.f_bsize;
1005 #endif
1006     availblks = totalblks - reserved;
1007     dp->f_files = statbuf.f_files;      /* max # of files in partition */
1008
1009     /* Now free and totalblks are in fragment units, but we want them in
1010      * 1K units.
1011      */
1012     if (bsize >= 1024) {
1013         free *= (bsize / 1024);
1014         totalblks *= (bsize / 1024);
1015         availblks *= (bsize / 1024);
1016         reserved *= (bsize / 1024);
1017     } else {
1018         free /= (1024 / bsize);
1019         totalblks /= (1024 / bsize);
1020         availblks /= (1024 / bsize);
1021         reserved /= (1024 / bsize);
1022     }
1023     /* now compute remaining figures */
1024     used = totalblks - free;
1025
1026     dp->minFree = reserved;     /* only used in VPrintDiskStats_r */
1027     dp->totalUsable = availblks;
1028     dp->free = availblks - used;        /* this is exactly f_bavail */
1029 }
1030 #endif /* AFS_NT40_ENV */
1031
1032 void
1033 VSetPartitionDiskUsage(struct DiskPartition64 *dp)
1034 {
1035     VOL_LOCK;
1036     VSetPartitionDiskUsage_r(dp);
1037     VOL_UNLOCK;
1038 }
1039
1040 void
1041 VResetDiskUsage_r(void)
1042 {
1043     struct DiskPartition64 *dp;
1044     for (dp = DiskPartitionList; dp; dp = dp->next) {
1045         VSetPartitionDiskUsage_r(dp);
1046 #ifndef AFS_PTHREAD_ENV
1047         IOMGR_Poll();
1048 #endif /* !AFS_PTHREAD_ENV */
1049     }
1050 }
1051
1052 void
1053 VResetDiskUsage(void)
1054 {
1055     VOL_LOCK;
1056     VResetDiskUsage_r();
1057     VOL_UNLOCK;
1058 }
1059
1060 void
1061 VAdjustDiskUsage_r(Error * ec, Volume * vp, afs_sfsize_t blocks,
1062                    afs_sfsize_t checkBlocks)
1063 {
1064     *ec = 0;
1065     /* why blocks instead of checkBlocks in the check below?  Otherwise, any check
1066      * for less than BlocksSpare would skip the error-checking path, and we
1067      * could grow existing files forever, not just for another BlocksSpare
1068      * blocks. */
1069     if (blocks > 0) {
1070 #ifdef  AFS_AIX32_ENV
1071         afs_int32 rem, minavail;
1072
1073         if ((rem = vp->partition->free - checkBlocks) < (minavail =
1074                                                          (vp->partition->
1075                                                           totalUsable *
1076                                                           aixlow_water) /
1077                                                          100))
1078 #else
1079         if (vp->partition->free - checkBlocks < 0)
1080 #endif
1081             *ec = VDISKFULL;
1082         else if (V_maxquota(vp)
1083                  && V_diskused(vp) + checkBlocks > V_maxquota(vp))
1084             *ec = VOVERQUOTA;
1085     }
1086     vp->partition->free -= blocks;
1087     V_diskused(vp) += blocks;
1088 }
1089
1090 void
1091 VAdjustDiskUsage(Error * ec, Volume * vp, afs_sfsize_t blocks,
1092                  afs_sfsize_t checkBlocks)
1093 {
1094     VOL_LOCK;
1095     VAdjustDiskUsage_r(ec, vp, blocks, checkBlocks);
1096     VOL_UNLOCK;
1097 }
1098
1099 int
1100 VDiskUsage_r(Volume * vp, afs_sfsize_t blocks)
1101 {
1102     if (blocks > 0) {
1103 #ifdef  AFS_AIX32_ENV
1104         afs_int32 rem, minavail;
1105
1106         if ((rem = vp->partition->free - blocks) < (minavail =
1107                                                     (vp->partition->
1108                                                      totalUsable *
1109                                                      aixlow_water) / 100))
1110 #else
1111         if (vp->partition->free - blocks < 0)
1112 #endif
1113             return (VDISKFULL);
1114     }
1115     vp->partition->free -= blocks;
1116     return 0;
1117 }
1118
1119 int
1120 VDiskUsage(Volume * vp, afs_sfsize_t blocks)
1121 {
1122     int retVal;
1123     VOL_LOCK;
1124     retVal = VDiskUsage_r(vp, blocks);
1125     VOL_UNLOCK;
1126     return retVal;
1127 }
1128
1129 void
1130 VPrintDiskStats_r(void)
1131 {
1132     struct DiskPartition64 *dp;
1133     for (dp = DiskPartitionList; dp; dp = dp->next) {
1134         if (dp->free < 0) {
1135             Log("Partition %s: %lld "
1136                 " available 1K blocks (minfree=%lld), "
1137                 "overallocated by %lld blocks\n", dp->name,
1138                 dp->totalUsable, dp->minFree, -dp->free);
1139         } else {
1140             Log("Partition %s: %lld"
1141                 " available 1K blocks (minfree=%lld), "
1142                 "%lld free blocks\n", dp->name,
1143                 dp->totalUsable, dp->minFree, dp->free);
1144         }
1145     }
1146 }
1147
1148 void
1149 VPrintDiskStats(void)
1150 {
1151     VOL_LOCK;
1152     VPrintDiskStats_r();
1153     VOL_UNLOCK;
1154 }
1155
1156 #ifdef AFS_NT40_ENV
1157 /* Need a separate lock file on NT, since NT only has mandatory file locks. */
1158 #define LOCKFILE "LOCKFILE"
1159 void
1160 VLockPartition_r(char *name)
1161 {
1162     struct DiskPartition64 *dp = VGetPartition_r(name, 0);
1163     OVERLAPPED lap;
1164
1165     if (!dp)
1166         return;
1167     if (dp->lock_fd == INVALID_FD) {
1168         char path[64];
1169         int rc;
1170         (void)sprintf(path, "%s\\%s", VPartitionPath(dp), LOCKFILE);
1171         dp->lock_fd =
1172             (FD_t)CreateFile(path, GENERIC_WRITE,
1173                             FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
1174                             CREATE_ALWAYS, FILE_ATTRIBUTE_HIDDEN, NULL);
1175         opr_Assert(dp->lock_fd != INVALID_FD);
1176
1177         memset(&lap, 0, sizeof(lap));
1178         rc = LockFileEx((HANDLE) dp->lock_fd, LOCKFILE_EXCLUSIVE_LOCK, 0, 1,
1179                         0, &lap);
1180         opr_Assert(rc);
1181     }
1182 }
1183
1184 void
1185 VUnlockPartition_r(char *name)
1186 {
1187     struct DiskPartition64 *dp = VGetPartition_r(name, 0);
1188     OVERLAPPED lap;
1189
1190     if (!dp)
1191         return;                 /* no partition, will fail later */
1192     memset(&lap, 0, sizeof(lap));
1193
1194     UnlockFileEx((HANDLE) dp->lock_fd, 0, 1, 0, &lap);
1195     CloseHandle((HANDLE) dp->lock_fd);
1196     dp->lock_fd = INVALID_FD;
1197 }
1198 #else /* AFS_NT40_ENV */
1199
1200 #if defined(AFS_HPUX_ENV)
1201 #define BITS_PER_CHAR   (8)
1202 #define BITS(type)      (sizeof(type) * BITS_PER_CHAR)
1203
1204 #define LOCKRDONLY_OFFSET       ((PRIV_LOCKRDONLY - 1) / BITS(int))
1205 #endif /* defined(AFS_HPUX_ENV) */
1206
1207 void
1208 VLockPartition_r(char *name)
1209 {
1210     struct DiskPartition64 *dp = VGetPartition_r(name, 0);
1211     char *partitionName;
1212     int retries, code;
1213     struct timeval pausing;
1214 #if defined(AFS_HPUX_ENV)
1215     int lockfRtn;
1216     struct privgrp_map privGrpList[PRIV_MAXGRPS];
1217     unsigned int *globalMask;
1218     int globalMaskIndex;
1219 #endif /* defined(AFS_HPUX_ENV) */
1220 #if defined(AFS_DARWIN_ENV)
1221     char lockfile[MAXPATHLEN];
1222 #endif /* defined(AFS_DARWIN_ENV) */
1223 #ifdef AFS_NAMEI_ENV
1224 #ifdef AFS_AIX42_ENV
1225     char LockFileName[MAXPATHLEN + 1];
1226
1227     sprintf((char *)&LockFileName, "%s/AFSINODE_FSLock", name);
1228     partitionName = (char *)&LockFileName;
1229 #endif
1230 #endif
1231
1232     if (!dp)
1233         return;                 /* no partition, will fail later */
1234     if (dp->lock_fd != INVALID_FD)
1235         return;
1236
1237 #if    defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV)
1238 #if !defined(AFS_AIX42_ENV) || !defined(AFS_NAMEI_ENV)
1239     partitionName = dp->devName;
1240 #endif
1241     code = O_RDWR;
1242 #elif defined(AFS_DARWIN_ENV)
1243     strlcpy((partitionName = lockfile), dp->name, sizeof(lockfile));
1244     strlcat(lockfile, "/.lock.afs", sizeof(lockfile));
1245     code = O_RDONLY | O_CREAT;
1246 #else
1247     partitionName = dp->name;
1248     code = O_RDONLY;
1249 #endif
1250
1251     for (retries = 25; retries; retries--) {
1252         if (code & O_CREAT)
1253             dp->lock_fd = afs_open(partitionName, code, 0644);
1254         else
1255             dp->lock_fd = afs_open(partitionName, code);
1256
1257         if (dp->lock_fd != INVALID_FD)
1258             break;
1259         if (errno == ENOENT)
1260             code |= O_CREAT;
1261         pausing.tv_sec = 0;
1262         pausing.tv_usec = 500000;
1263         select(0, NULL, NULL, NULL, &pausing);
1264     }
1265     opr_Assert(retries != 0);
1266
1267 #if defined (AFS_HPUX_ENV)
1268
1269     opr_Verify(getprivgrp(privGrpList) == 0);
1270
1271     /*
1272      * In general, it will difficult and time-consuming ,if not impossible,
1273      * to try to find the privgroup to which this process belongs that has the
1274      * smallest membership, to minimise the security hole.  So, we use the privgrp
1275      * to which everybody belongs.
1276      */
1277     /* first, we have to find the global mask */
1278     for (globalMaskIndex = 0; globalMaskIndex < PRIV_MAXGRPS;
1279          globalMaskIndex++) {
1280         if (privGrpList[globalMaskIndex].priv_groupno == PRIV_GLOBAL) {
1281             globalMask =
1282                 &(privGrpList[globalMaskIndex].priv_mask[LOCKRDONLY_OFFSET]);
1283             break;
1284         }
1285     }
1286
1287     if (((*globalMask) & privmask(PRIV_LOCKRDONLY)) == 0) {
1288         /* allow everybody to set a lock on a read-only file descriptor */
1289         (*globalMask) |= privmask(PRIV_LOCKRDONLY);
1290         opr_Verify(setprivgrp(PRIV_GLOBAL,
1291                               privGrpList[globalMaskIndex].priv_mask) == 0);
1292
1293         lockfRtn = lockf(dp->lock_fd, F_LOCK, 0);
1294
1295         /* remove the privilege granted to everybody to lock a read-only fd */
1296         (*globalMask) &= ~(privmask(PRIV_LOCKRDONLY));
1297         opr_Verify(setprivgrp(PRIV_GLOBAL,
1298                               privGrpList[globalMaskIndex].priv_mask) == 0);
1299     } else {
1300         /* in this case, we should be able to do this with impunity, anyway */
1301         lockfRtn = lockf(dp->lock_fd, F_LOCK, 0);
1302     }
1303
1304     opr_Assert(lockfRtn != -1);
1305 #else
1306 #if defined(AFS_AIX_ENV) || defined(AFS_SUN5_ENV)
1307     opr_Verify(lockf(dp->lock_fd, F_LOCK, 0) != -1);
1308 #else
1309     opr_Verify(flock(dp->lock_fd, LOCK_EX) == 0);
1310 #endif /* defined(AFS_AIX_ENV) || defined(AFS_SUN5_ENV) */
1311 #endif
1312 }
1313
1314 void
1315 VUnlockPartition_r(char *name)
1316 {
1317     struct DiskPartition64 *dp = VGetPartition_r(name, 0);
1318     if (!dp)
1319         return;                 /* no partition, will fail later */
1320     close(dp->lock_fd);
1321     dp->lock_fd = INVALID_FD;
1322 }
1323
1324 #endif /* AFS_NT40_ENV */
1325
1326 void
1327 VLockPartition(char *name)
1328 {
1329     VOL_LOCK;
1330     VLockPartition_r(name);
1331     VOL_UNLOCK;
1332 }
1333
1334 void
1335 VUnlockPartition(char *name)
1336 {
1337     VOL_LOCK;
1338     VUnlockPartition_r(name);
1339     VOL_UNLOCK;
1340 }
1341
1342 #ifdef AFS_DEMAND_ATTACH_FS
1343
1344 /* new-style partition locks; these are only to have some mutual exclusion
1345  * between the VGC scanner and volume utilies creating/altering vol headers
1346  */
1347
1348 /**
1349  * lock a partition's vol headers.
1350  *
1351  * @param[in] dp       the partition to lock
1352  * @param[in] locktype READ_LOCK or WRITE_LOCK
1353  *
1354  * @return operation status
1355  *  @retval 0 success
1356  */
1357 int
1358 VPartHeaderLock(struct DiskPartition64 *dp, int locktype)
1359 {
1360     int code;
1361
1362     /* block on acquiring the lock */
1363     int nonblock = 0;
1364
1365     code = VGetDiskLock(&dp->headerLock, locktype, nonblock);
1366     if (code) {
1367         Log("VPartHeaderLock: error %d locking partititon %s\n", code,
1368             VPartitionPath(dp));
1369     }
1370     return code;
1371 }
1372
1373 /**
1374  * unlock a partition's vol headers.
1375  *
1376  * @param[in] dp       the partition to unlock
1377  * @param[in] locktype READ_LOCK or WRITE_LOCK
1378  */
1379 void
1380 VPartHeaderUnlock(struct DiskPartition64 *dp, int locktype)
1381 {
1382     VReleaseDiskLock(&dp->headerLock, locktype);
1383 }
1384
1385 /* XXX not sure this will work on AFS_NT40_ENV
1386  * needs to be tested!
1387  */
1388
1389 /**
1390  * lookup a disk partition object by its index number.
1391  *
1392  * @param[in] id      partition index number
1393  * @param[in] abortp  see abortp usage note below
1394  *
1395  * @return disk partition object
1396  *   @retval NULL no such disk partition
1397  *
1398  * @note when abortp is non-zero, lookups which would return
1399  *       NULL will result in an assertion failure
1400  *
1401  * @pre VOL_LOCK must be held
1402  *
1403  * @internal volume package internal use only
1404  */
1405
1406 struct DiskPartition64 *
1407 VGetPartitionById_r(afs_int32 id, int abortp)
1408 {
1409     struct DiskPartition64 *dp = NULL;
1410
1411     if ((id >= 0) && (id <= VOLMAXPARTS)) {
1412         dp = DiskPartitionTable[id];
1413     }
1414
1415     if (abortp) {
1416         opr_Assert(dp != NULL);
1417     }
1418     return dp;
1419 }
1420
1421 /**
1422  * lookup a disk partition object by its index number.
1423  *
1424  * @param[in] id      partition index number
1425  * @param[in] abortp  see abortp usage note below
1426  *
1427  * @return disk partition object
1428  *   @retval NULL no such disk partition
1429  *
1430  * @note when abortp is non-zero, lookups which would return
1431  *       NULL will result in an assertion failure
1432  */
1433
1434 struct DiskPartition64 *
1435 VGetPartitionById(afs_int32 id, int abortp)
1436 {
1437     struct DiskPartition64 * dp;
1438
1439     VOL_LOCK;
1440     dp = VGetPartitionById_r(id, abortp);
1441     VOL_UNLOCK;
1442
1443     return dp;
1444 }
1445
1446 static struct DiskPartition64 *
1447 VLookupPartition_r(char * path)
1448 {
1449     afs_int32 id = volutil_GetPartitionID(path);
1450
1451     if (id < 0 || id > VOLMAXPARTS)
1452         return NULL;
1453
1454     return DiskPartitionTable[id];
1455 }
1456
1457 static void
1458 AddPartitionToTable_r(struct DiskPartition64 *dp)
1459 {
1460     opr_Assert(dp->index >= 0 && dp->index <= VOLMAXPARTS);
1461     DiskPartitionTable[dp->index] = dp;
1462 }
1463
1464 #if 0
1465 static void
1466 DeletePartitionFromTable_r(struct DiskPartition64 *dp)
1467 {
1468     opr_Assert(dp->index >= 0 && dp->index <= VOLMAXPARTS);
1469     DiskPartitionTable[dp->index] = NULL;
1470 }
1471 #endif
1472 #endif /* AFS_DEMAND_ATTACH_FS */