2 * Copyright 2000, International Business Machines Corporation and others.
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
10 /* 1/1/89: NB: this stuff is all going to be replaced. Don't take it too seriously */
15 Institution: The Information Technology Center, Carnegie-Mellon University
19 #include <afsconfig.h>
20 #include <afs/param.h>
25 #include <afs/afsint.h>
28 #include <sys/param.h>
29 #if !defined(AFS_SGI_ENV)
32 #else /* AFS_OSF_ENV */
33 #ifdef AFS_VFSINCL_ENV
36 #include <sys/fs/ufs_fs.h>
38 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
39 #include <ufs/ufs/dinode.h>
40 #include <ufs/ffs/fs.h>
45 #else /* AFS_VFSINCL_ENV */
46 #if !defined(AFS_AIX_ENV) && !defined(AFS_LINUX20_ENV) && !defined(AFS_XBSD_ENV)
49 #endif /* AFS_VFSINCL_ENV */
50 #endif /* AFS_OSF_ENV */
51 #endif /* AFS_SGI_ENV */
52 #endif /* AFS_NT40_ENV */
70 #if defined(AFS_SUN_ENV) || defined(AFS_SUN5_ENV)
72 #include <sys/mnttab.h>
73 #include <sys/mntent.h>
79 #if defined(AFS_SGI_ENV)
82 #ifdef AFS_SGI_EFS_IOPS_ENV
83 #define ROOTINO EFS_ROOTINO
84 #include <sys/fs/efs.h>
85 #include "sgiefs/efs.h" /* until 5.1 release */
90 #ifndef AFS_LINUX20_ENV
91 #include <fstab.h> /* Need to find in libc 5, present in libc 6 */
94 #endif /* AFS_SGI_ENV */
96 #endif /* AFS_HPUX_ENV */
100 #include <netinet/in.h>
101 #include <sys/wait.h>
104 #include <sys/time.h>
105 #endif /* ITIMER_REAL */
106 #endif /* AFS_NT40_ENV */
107 #if defined(AFS_SUN5_ENV) || defined(AFS_NT40_ENV) || defined(AFS_LINUX20_ENV)
114 #include <afs/errors.h>
117 #include <afs/afssyscalls.h>
120 #include <afs/afsutil.h>
125 #include "partition.h"
126 #ifdef AFS_PTHREAD_ENV
128 #else /* AFS_PTHREAD_ENV */
129 #include "afs/assert.h"
130 #endif /* AFS_PTHREAD_ENV */
137 #ifdef AFS_PTHREAD_ENV
138 pthread_mutex_t vol_glock_mutex;
139 pthread_mutex_t vol_attach_mutex;
140 pthread_cond_t vol_put_volume_cond;
141 pthread_cond_t vol_sleep_cond;
142 #endif /* AFS_PTHREAD_ENV */
145 extern void *calloc(), *realloc();
148 /* Forward declarations */
149 static Volume *attach2();
150 static void FreeVolume();
151 static void VScanUpdateList();
152 static void InitLRU();
153 static int GetVolumeHeader();
154 static void ReleaseVolumeHeader();
155 static void FreeVolumeHeader();
156 static void AddVolumeToHashTable();
157 static void DeleteVolumeFromHashTable();
158 static int VHold(Volume *vp);
159 static int VHold_r(Volume *vp);
160 static void GetBitmap(Error *ec, Volume *vp, VnodeClass class);
161 static void GetVolumePath(Error *ec, VolId volumeId, char **partitionp,
163 static void VReleaseVolumeHandles_r(Volume *vp);
164 static void VCloseVolumeHandles_r(Volume *vp);
166 int LogLevel; /* Vice loglevel--not defined as extern so that it will be
167 defined when not linked with vice, XXXX */
168 ProgramType programType; /* The type of program using the package */
171 #define VOLUME_BITMAP_GROWSIZE 16 /* bytes, => 128vnodes */
172 /* Must be a multiple of 4 (1 word) !!*/
173 #define VOLUME_HASH_TABLE_SIZE 128 /* Must be a power of 2!! */
174 #define VOLUME_HASH(volumeId) (volumeId&(VOLUME_HASH_TABLE_SIZE-1))
175 private Volume *VolumeHashTable[VOLUME_HASH_TABLE_SIZE];
178 /* This macro is used where an ffs() call does not exist. Was in util/ffs.c */
181 afs_int32 ffs_tmp = x; \
182 if (ffs_tmp == 0) return(-1); \
184 for (ffs_i = 1;; ffs_i++) { \
185 if (ffs_tmp & 1) return(ffs_i); \
186 else ffs_tmp >>= 1; \
189 #endif /* !AFS_HAVE_FFS */
191 struct Lock vol_listLock; /* Lock obtained when listing volumes: prevents a volume from being missed if the volume is attached during a list volumes */
193 extern struct Lock FSYNC_handler_lock;
195 Volume *VAttachVolumeByName();
196 Volume *VAttachVolumeByName_r();
198 static int TimeZoneCorrection; /* Number of seconds west of GMT */
200 /* Common message used when the volume goes off line */
201 char *VSalvageMessage =
202 "Files in this volume are currently unavailable; call operations";
204 int VInit; /* 0 - uninitialized,
205 1 - initialized but not all volumes have been attached,
206 2 - initialized and all volumes have been attached,
207 3 - initialized, all volumes have been attached, and
208 VConnectFS() has completed. */
211 int VolumeCacheCheck; /* Incremented everytime a volume goes on line--
212 * used to stamp volume headers and in-core
213 * vnodes. When the volume goes on-line the
214 * vnode will be invalidated */
216 int VolumeCacheSize = 200, VolumeGets=0, VolumeReplacements=0, Vlooks = 0;
219 int VInitVolumePackage(ProgramType pt, int nLargeVnodes, int nSmallVnodes,
220 int connect, int volcache)
222 int errors = 0; /* Number of errors while finding vice partitions. */
228 #ifdef AFS_PTHREAD_ENV
229 assert(pthread_mutex_init(&vol_glock_mutex, NULL) == 0);
230 assert(pthread_mutex_init(&vol_attach_mutex, NULL) == 0);
231 assert(pthread_cond_init(&vol_put_volume_cond, NULL) == 0);
232 assert(pthread_cond_init(&vol_sleep_cond, NULL) == 0);
233 #else /* AFS_PTHREAD_ENV */
235 #endif /* AFS_PTHREAD_ENV */
236 Lock_Init(&vol_listLock);
237 Lock_Init(&FSYNC_handler_lock);
238 srandom(time(0)); /* For VGetVolumeInfo */
239 gettimeofday(&tv, &tz);
240 TimeZoneCorrection = tz.tz_minuteswest*60;
242 /* Ok, we have done enough initialization that fileserver can
243 * start accepting calls, even though the volumes may not be
244 * available just yet.
248 if (programType == fileServer) {
249 /* File server or "stand" */
253 if (volcache > VolumeCacheSize)
254 VolumeCacheSize = volcache;
255 InitLRU(VolumeCacheSize);
257 VInitVnodes(vLarge, nLargeVnodes);
258 VInitVnodes(vSmall, nSmallVnodes);
261 errors = VAttachPartitions();
265 if (programType == fileServer) {
268 struct DiskPartition *diskP;
271 /* Attach all the volumes in this partition */
272 for (diskP = DiskPartitionList; diskP; diskP = diskP->next) {
273 int nAttached = 0, nUnattached = 0;
274 dirp = opendir(VPartitionPath(diskP));
276 while (dp = readdir(dirp)) {
278 p = strrchr(dp->d_name, '.');
279 if (p != NULL && strcmp(p, VHDREXT) == 0) {
282 vp = VAttachVolumeByName(&error, diskP->name, dp->d_name,
284 (*(vp?&nAttached:&nUnattached))++;
285 if (error == VOFFLINE)
286 Log("Volume %u stays offline (/vice/offline/%s exists)\n",
287 VolumeNumber(dp->d_name), dp->d_name);
293 Log("Partition %s: attached %d volumes; %d volumes not attached\n",
294 diskP->name, nAttached, nUnattached);
299 VInit = 2; /* Initialized, and all volumes have been attached */
300 if (programType == volumeUtility && connect) {
302 Log("Unable to connect to file server; aborted\n");
309 /* This must be called by any volume utility which needs to run while the
310 file server is also running. This is separated from VInitVolumePackage so
311 that a utility can fork--and each of the children can independently
312 initialize communication with the file server */
317 retVal = VConnectFS_r();
322 int VConnectFS_r(void)
325 assert(VInit == 2 && programType == volumeUtility);
326 rc = FSYNC_clientInit();
332 void VDisconnectFS_r(void) {
333 assert(programType == volumeUtility);
338 void VDisconnectFS(void) {
344 void VShutdown_r(void)
347 register Volume *vp, *np;
348 register afs_int32 code;
350 Log("VShutdown: shutting down on-line volumes...\n");
351 for (i=0; i<VOLUME_HASH_TABLE_SIZE; i++) {
352 /* try to hold first volume in the hash table */
353 for(vp = VolumeHashTable[i]; vp; vp=vp->hashNext) {
355 if (code == 0) break; /* got it */
356 /* otherwise we go around again, trying another volume */
359 /* first compute np before releasing vp, in case vp disappears
360 * after releasing. Hold it, so it doesn't disapear. If we
361 * can't hold it, try the next one in the chain. Invariant
362 * at the top of this loop is that vp is held (has extra ref count).
364 for(np=vp->hashNext; np; np=np->hashNext) {
366 if (code == 0) break; /* got it */
368 /* next, take the volume offline (drops reference count) */
369 VOffline_r(vp, "File server was shut down");
370 vp = np; /* next guy to try */
373 Log("VShutdown: complete.\n");
384 static void ReadHeader(Error *ec, IHandle_t *h, char *to, int size,
385 int magic, int version)
387 struct versionStamp *vsn;
402 if (FDH_SEEK(fdP, 0, SEEK_SET) < 0) {
404 FDH_REALLYCLOSE(fdP);
407 vsn = (struct versionStamp *) to;
408 if (FDH_READ(fdP, to, size) != size || vsn->magic != magic) {
410 FDH_REALLYCLOSE(fdP);
415 /* Check is conditional, in case caller wants to inspect version himself */
416 if (version && vsn->version != version) {
421 /* VolumeHeaderToDisk
422 * Allows for storing 64 bit inode numbers in on-disk volume header
425 void VolumeHeaderToDisk(VolumeDiskHeader_t *dh, VolumeHeader_t *h)
428 memset((char*)dh, 0, sizeof(VolumeDiskHeader_t));
429 dh->stamp = h->stamp;
431 dh->parent = h->parent;
433 #ifdef AFS_64BIT_IOPS_ENV
434 dh->volumeInfo_lo = (afs_int32) h->volumeInfo & 0xffffffff;
435 dh->volumeInfo_hi = (afs_int32) (h->volumeInfo >> 32) & 0xffffffff;
436 dh->smallVnodeIndex_lo = (afs_int32) h->smallVnodeIndex & 0xffffffff;
437 dh->smallVnodeIndex_hi = (afs_int32) (h->smallVnodeIndex >> 32) & 0xffffffff;
438 dh->largeVnodeIndex_lo = (afs_int32) h->largeVnodeIndex & 0xffffffff;
439 dh->largeVnodeIndex_hi = (afs_int32) (h->largeVnodeIndex >> 32) & 0xffffffff;
440 dh->linkTable_lo = (afs_int32) h->linkTable & 0xffffffff;
441 dh->linkTable_hi = (afs_int32) (h->linkTable >> 32) & 0xffffffff;
443 dh->volumeInfo_lo = h->volumeInfo;
444 dh->smallVnodeIndex_lo = h->smallVnodeIndex;
445 dh->largeVnodeIndex_lo = h->largeVnodeIndex;
446 dh->linkTable_lo = h->linkTable;
450 /* DiskToVolumeHeader
451 * Reads volume header file from disk, convering 64 bit inodes
452 * if required. Makes the assumption that AFS has *always*
453 * zero'd the volume header file so that high parts of inode
454 * numbers are 0 in older (SGI EFS) volume header files.
456 void DiskToVolumeHeader(VolumeHeader_t *h, VolumeDiskHeader_t *dh)
458 memset((char*)h, 0, sizeof(VolumeHeader_t));
459 h->stamp = dh->stamp;
461 h->parent = dh->parent;
463 #ifdef AFS_64BIT_IOPS_ENV
464 h->volumeInfo = dh->volumeInfo_lo | ((Inode)dh->volumeInfo_hi << 32);
466 h->smallVnodeIndex = dh->smallVnodeIndex_lo |
467 ((Inode)dh->smallVnodeIndex_hi << 32);
469 h->largeVnodeIndex = dh->largeVnodeIndex_lo |
470 ((Inode)dh->largeVnodeIndex_hi << 32);
471 h->linkTable = dh->linkTable_lo |
472 ((Inode)dh->linkTable_hi << 32);
474 h->volumeInfo = dh->volumeInfo_lo;
475 h->smallVnodeIndex = dh->smallVnodeIndex_lo;
476 h->largeVnodeIndex = dh->largeVnodeIndex_lo;
477 h->linkTable = dh->linkTable_lo;
482 void WriteVolumeHeader_r(ec, vp)
486 IHandle_t *h = V_diskDataHandle(vp);
496 if (FDH_SEEK(fdP, 0, SEEK_SET) < 0) {
498 FDH_REALLYCLOSE(fdP);
501 if (FDH_WRITE(fdP, (char*)&V_disk(vp), sizeof(V_disk(vp)))
502 != sizeof(V_disk(vp))) {
504 FDH_REALLYCLOSE(fdP);
510 /* Attach an existing volume, given its pathname, and return a
511 pointer to the volume header information. The volume also
512 normally goes online at this time. An offline volume
513 must be reattached to make it go online */
515 VAttachVolumeByName(Error *ec, char *partition, char *name, int mode)
520 retVal = VAttachVolumeByName_r(ec, partition, name, mode);
527 VAttachVolumeByName_r(Error *ec, char *partition, char *name, int mode)
532 struct VolumeDiskHeader diskHeader;
533 struct VolumeHeader iheader;
534 struct DiskPartition *partp;
538 if (programType == volumeUtility) {
540 VLockPartition_r(partition);
542 if (programType == fileServer) {
543 vp = VGetVolume_r(ec, VolumeNumber(name));
547 if (vp->specialStatus == VBUSY)
549 VDetachVolume_r(ec, vp);
551 Log("VAttachVolume: Error detaching volume (%s)\n", name);
556 if (!(partp = VGetPartition_r(partition, 0))) {
558 Log("VAttachVolume: Error getting partition (%s)\n", partition);
563 strcpy(path, VPartitionPath(partp));
567 if ((fd = open(path, O_RDONLY)) == -1 || fstat(fd,&status) == -1) {
573 n = read(fd, &diskHeader, sizeof (diskHeader));
576 if (n != sizeof (diskHeader) || diskHeader.stamp.magic != VOLUMEHEADERMAGIC) {
577 Log("VAttachVolume: Error reading volume header %s\n", path);
581 if (diskHeader.stamp.version != VOLUMEHEADERVERSION) {
582 Log("VAttachVolume: Volume %s, version number is incorrect; volume needs salvaged\n",path);
587 DiskToVolumeHeader(&iheader, &diskHeader);
588 if (programType == volumeUtility && mode != V_SECRETLY) {
589 if (FSYNC_askfs(iheader.id, partition, FSYNC_NEEDVOLUME, mode)
591 Log("VAttachVolume: attach of volume %u apparently denied by file server\n",
593 *ec = VNOVOL; /* XXXX */
598 vp = attach2(ec, path, &iheader, partp, isbusy);
599 if (programType == volumeUtility && vp) {
600 /* duplicate computation in fssync.c about whether the server
601 * takes the volume offline or not. If the volume isn't
602 * offline, we must not return it when we detach the volume,
603 * or the server will abort */
604 if (mode == V_READONLY || (!VolumeWriteable(vp) && (mode==V_CLONE || mode==V_DUMP)))
605 vp->needsPutBack = 0;
607 vp->needsPutBack = 1;
609 /* OK, there's a problem here, but one that I don't know how to
610 * fix right now, and that I don't think should arise often.
611 * Basically, we should only put back this volume to the server if
612 * it was given to us by the server, but since we don't have a vp,
613 * we can't run the VolumeWriteable function to find out as we do
614 * above when computing vp->needsPutBack. So we send it back, but
615 * there's a path in VAttachVolume on the server which may abort
616 * if this volume doesn't have a header. Should be pretty rare
617 * for all of that to happen, but if it does, probably the right
618 * fix is for the server to allow the return of readonly volumes
619 * that it doesn't think are really checked out. */
620 if (programType == volumeUtility && vp == NULL && mode != V_SECRETLY) {
621 FSYNC_askfs(iheader.id, partition, FSYNC_ON, 0);
623 else if (programType == fileServer && vp) {
624 V_needsCallback(vp) = 0;
626 if (VInit >= 2 && V_BreakVolumeCallbacks) {
627 Log("VAttachVolume: Volume %u was changed externally; breaking callbacks\n", V_id(vp));
628 (*V_BreakVolumeCallbacks)(V_id(vp));
631 VUpdateVolume_r(ec,vp);
633 Log("VAttachVolume: Error updating volume\n");
638 if (VolumeWriteable(vp) && V_dontSalvage(vp) == 0) {
639 /* This is a hack: by temporarily settint the incore
640 * dontSalvage flag ON, the volume will be put back on the
641 * Update list (with dontSalvage OFF again). It will then
642 * come back in N minutes with DONT_SALVAGE eventually
643 * set. This is the way that volumes that have never had
644 * it set get it set; or that volumes that have been
645 * offline without DONT SALVAGE having been set also
646 * eventually get it set */
647 V_dontSalvage(vp) = DONT_SALVAGE;
648 VAddToVolumeUpdateList_r(ec,vp);
650 Log("VAttachVolume: Error adding volume to update list\n");
657 Log("VOnline: volume %u (%s) attached and online\n",
658 V_id(vp), V_name(vp));
661 if (programType == volumeUtility) {
662 VUnlockPartition_r(partition);
670 private Volume *attach2(Error *ec, char *path, register struct VolumeHeader
671 *header, struct DiskPartition *partp, int isbusy)
676 vp = (Volume *) calloc(1, sizeof(Volume));
678 vp->specialStatus = (isbusy ? VBUSY : 0);
679 vp->device = partp->device;
680 vp->partition = partp;
681 IH_INIT(vp->vnodeIndex[vLarge].handle, partp->device, header->parent,
682 header->largeVnodeIndex);
683 IH_INIT(vp->vnodeIndex[vSmall].handle, partp->device, header->parent,
684 header->smallVnodeIndex);
685 IH_INIT(vp->diskDataHandle, partp->device, header->parent,
687 IH_INIT(vp->linkHandle, partp->device, header->parent,
689 vp->cacheCheck = ++VolumeCacheCheck;
690 /* just in case this ever rolls over */
692 vp->cacheCheck = ++VolumeCacheCheck;
693 vp->shuttingDown = 0;
694 vp->goingOffline = 0;
699 (void) ReadHeader(ec, V_diskDataHandle(vp),
700 (char *)&V_disk(vp), sizeof(V_disk(vp)),
701 VOLUMEINFOMAGIC, VOLUMEINFOVERSION);
704 Log("VAttachVolume: Error reading diskDataHandle vol header %s; error=%d\n",
708 struct IndexFileHeader iHead;
710 #if OPENAFS_VOL_STATS
712 * We just read in the diskstuff part of the header. If the detailed
713 * volume stats area has not yet been initialized, we should bzero the
714 * area and mark it as initialized.
716 if (! (V_stat_initialized(vp))) {
717 memset((char *)(V_stat_area(vp)), 0, VOL_STATS_BYTES);
718 V_stat_initialized(vp) = 1;
720 #endif /* OPENAFS_VOL_STATS */
722 (void) ReadHeader(ec, vp->vnodeIndex[vSmall].handle,
723 (char *)&iHead, sizeof(iHead),
724 SMALLINDEXMAGIC, SMALLINDEXVERSION);
727 Log("VAttachVolume: Error reading smallVnode vol header %s; error=%d\n",
732 struct IndexFileHeader iHead;
734 (void) ReadHeader(ec, vp->vnodeIndex[vLarge].handle,
735 (char *)&iHead, sizeof(iHead),
736 LARGEINDEXMAGIC, LARGEINDEXVERSION);
739 Log("VAttachVolume: Error reading largeVnode vol header %s; error=%d\n",
745 struct versionStamp stamp;
747 (void) ReadHeader(ec, V_linkHandle(vp),
748 (char *)&stamp, sizeof(stamp),
749 LINKTABLEMAGIC, LINKTABLEVERSION);
752 Log("VAttachVolume: Error reading namei vol header %s; error=%d\n",
758 Log("VAttachVolume: Error attaching volume %s; volume needs salvage; error=%d\n",
763 if (V_needsSalvaged(vp)) {
764 if (vp->specialStatus) vp->specialStatus = 0;
765 Log("VAttachVolume: volume salvage flag is ON for %s; volume needs salvage\n", path);
769 if (programType == fileServer) {
771 if (V_inUse(vp) && VolumeWriteable(vp)) {
772 if (!V_needsSalvaged(vp)) {
773 V_needsSalvaged(vp) = 1;
774 VUpdateVolume_r(ec,vp);
777 Log("VAttachVolume: volume %s needs to be salvaged; not attached.\n", path);
781 #endif /* FAST_RESTART */
782 if (V_destroyMe(vp) == DESTROY_ME) {
784 Log("VAttachVolume: volume %s is junk; it should be destroyed at next salvage\n", path);
790 AddVolumeToHashTable(vp, V_id(vp));
791 vp->nextVnodeUnique = V_uniquifier(vp);
792 vp->vnodeIndex[vSmall].bitmap = vp->vnodeIndex[vLarge].bitmap = NULL;
794 if (programType == fileServer && VolumeWriteable(vp)) {
796 for (i = 0; i<nVNODECLASSES; i++) {
802 Log("VAttachVolume: error getting bitmap for volume (%s)\n", path);
807 #endif /* BITMAP_LATER */
809 if (programType == fileServer) {
810 if (vp->specialStatus) vp->specialStatus = 0;
811 if (V_blessed(vp) && V_inService(vp) && !V_needsSalvaged(vp)) {
813 V_offlineMessage(vp)[0] = '\0';
820 /* Attach an existing volume.
821 The volume also normally goes online at this time.
822 An offline volume must be reattached to make it go online.
826 VAttachVolume(Error *ec, VolumeId volumeId, int mode)
831 retVal = VAttachVolume_r(ec, volumeId, mode);
838 VAttachVolume_r(Error *ec, VolumeId volumeId, int mode)
841 GetVolumePath(ec,volumeId, &part, &name);
845 vp = VGetVolume_r(&error, volumeId);
847 assert(V_inUse(vp) == 0);
848 VDetachVolume_r(ec, vp);
852 return VAttachVolumeByName_r(ec, part, name, mode);
855 /* Increment a reference count to a volume, sans context swaps. Requires
856 * possibly reading the volume header in from the disk, since there's
857 * an invariant in the volume package that nUsers>0 ==> vp->header is valid.
859 * N.B. This call can fail if we can't read in the header!! In this case
860 * we still guarantee we won't context swap, but the ref count won't be
861 * incremented (otherwise we'd violate the invariant).
863 static int VHold_r(register Volume *vp)
867 if (vp->nUsers == 0 && !GetVolumeHeader(vp)) {
868 VolumeReplacements++;
869 ReadHeader(&error, V_diskDataHandle(vp),
870 (char *)&V_disk(vp), sizeof(V_disk(vp)),
871 VOLUMEINFOMAGIC, VOLUMEINFOVERSION);
872 if (error) return error;
878 static int VHold(register Volume *vp)
882 retVal = VHold_r(vp);
887 void VTakeOffline_r(register Volume *vp)
889 assert(vp->nUsers > 0);
890 assert(programType == fileServer);
891 vp->goingOffline = 1;
892 V_needsSalvaged(vp) = 1;
895 void VTakeOffline(register Volume *vp)
902 void VPutVolume_r(register Volume *vp)
904 assert(--vp->nUsers >= 0);
905 if (vp->nUsers == 0) {
906 ReleaseVolumeHeader(vp->header);
907 if (vp->goingOffline) {
909 assert(programType == fileServer);
910 vp->goingOffline = 0;
912 VUpdateVolume_r(&error, vp);
913 VCloseVolumeHandles_r(vp);
915 Log("VOffline: Volume %u (%s) is now offline",
916 V_id(vp), V_name(vp));
917 if (V_offlineMessage(vp)[0])
918 Log(" (%s)", V_offlineMessage(vp));
921 #ifdef AFS_PTHREAD_ENV
922 assert(pthread_cond_broadcast(&vol_put_volume_cond) == 0);
923 #else /* AFS_PTHREAD_ENV */
924 LWP_NoYieldSignal(VPutVolume);
925 #endif /* AFS_PTHREAD_ENV */
927 if (vp->shuttingDown) {
928 VReleaseVolumeHandles_r(vp);
930 if (programType == fileServer)
931 #ifdef AFS_PTHREAD_ENV
932 assert(pthread_cond_broadcast(&vol_put_volume_cond) == 0);
933 #else /* AFS_PTHREAD_ENV */
934 LWP_NoYieldSignal(VPutVolume);
935 #endif /* AFS_PTHREAD_ENV */
940 void VPutVolume(register Volume *vp)
947 /* Get a pointer to an attached volume. The pointer is returned regardless
948 of whether or not the volume is in service or on/off line. An error
949 code, however, is returned with an indication of the volume's status */
950 Volume *VGetVolume(Error *ec, VolId volumeId)
954 retVal = VGetVolume_r(ec,volumeId);
959 Volume *VGetVolume_r(Error *ec, VolId volumeId)
962 unsigned short V0=0, V1=0, V2=0, V3=0, V4=0, V5=0, V6=0, V7=0, V8=0, V9=0;
963 unsigned short V10=0, V11=0, V12=0, V13=0, V14=0, V15=0;
968 for (vp = VolumeHashTable[VOLUME_HASH(volumeId)];
969 vp && vp->hashid != volumeId; vp = vp->hashNext)
976 /* Until we have reached an initialization level of 2
977 we don't know whether this volume exists or not.
978 We can't sleep and retry later because before a volume
979 is attached, the caller tries to get it first. Just
980 return VOFFLINE and the caller can choose whether to
981 retry the command or not.*/
992 if (vp->nUsers == 0 && !GetVolumeHeader(vp)) {
994 VolumeReplacements++;
995 ReadHeader(ec, V_diskDataHandle(vp),
996 (char *)&V_disk(vp), sizeof(V_disk(vp)), VOLUMEINFOMAGIC,
1000 /* Only log the error if it was a totally unexpected error. Simply
1001 a missing inode is likely to be caused by the volume being deleted */
1002 if (errno != ENXIO || LogLevel)
1003 Log("Volume %u: couldn't reread volume header\n", vp->hashid);
1010 if (vp->shuttingDown) {
1016 if (programType == fileServer) {
1018 if (vp->goingOffline) {
1020 #ifdef AFS_PTHREAD_ENV
1021 pthread_cond_wait(&vol_put_volume_cond, &vol_glock_mutex);
1022 #else /* AFS_PTHREAD_ENV */
1023 LWP_WaitProcess(VPutVolume);
1024 #endif /* AFS_PTHREAD_ENV */
1027 if (vp->specialStatus) {
1029 *ec = vp->specialStatus;
1031 else if (V_inService(vp)==0 || V_blessed(vp)==0) {
1035 else if (V_inUse(vp)==0) {
1046 /* if no error, bump nUsers */
1047 if (vp) vp->nUsers++;
1054 /* For both VForceOffline and VOffline, we close all relevant handles.
1055 * For VOffline, if we re-attach the volume, the files may possible be
1056 * different than before.
1058 static void VReleaseVolumeHandles_r(Volume *vp)
1060 DFlushVolume(V_id(vp));
1061 VReleaseVnodeFiles_r(vp);
1063 /* Too time consuming and unnecessary for the volserver */
1064 if (programType != volumeUtility) {
1065 IH_CONDSYNC(vp->vnodeIndex[vLarge].handle);
1066 IH_CONDSYNC(vp->vnodeIndex[vSmall].handle);
1067 IH_CONDSYNC(vp->diskDataHandle);
1069 IH_CONDSYNC(vp->linkHandle);
1070 #endif /* AFS_NT40_ENV */
1073 IH_RELEASE(vp->vnodeIndex[vLarge].handle);
1074 IH_RELEASE(vp->vnodeIndex[vSmall].handle);
1075 IH_RELEASE(vp->diskDataHandle);
1076 IH_RELEASE(vp->linkHandle);
1079 /* Force the volume offline, set the salvage flag. No further references to
1080 * the volume through the volume package will be honored. */
1081 void VForceOffline_r(Volume *vp)
1086 strcpy(V_offlineMessage(vp), "Forced offline due to internal error: volume needs to be salvaged");
1087 Log("Volume %u forced offline: it needs salvaging!\n", V_id(vp));
1089 vp->goingOffline = 0;
1090 V_needsSalvaged(vp) = 1;
1091 VUpdateVolume_r(&error, vp);
1092 #ifdef AFS_PTHREAD_ENV
1093 assert(pthread_cond_broadcast(&vol_put_volume_cond) == 0);
1094 #else /* AFS_PTHREAD_ENV */
1095 LWP_NoYieldSignal(VPutVolume);
1096 #endif /* AFS_PTHREAD_ENV */
1098 VReleaseVolumeHandles_r(vp);
1102 void VForceOffline(Volume *vp)
1105 VForceOffline_r(vp);
1109 /* The opposite of VAttachVolume. The volume header is written to disk, with
1110 the inUse bit turned off. A copy of the header is maintained in memory,
1111 however (which is why this is VOffline, not VDetach).
1113 void VOffline_r(Volume *vp, char *message)
1116 VolumeId vid = V_id(vp);
1117 assert(programType != volumeUtility);
1122 if (V_offlineMessage(vp)[0] == '\0')
1123 strncpy(V_offlineMessage(vp),message,
1124 sizeof(V_offlineMessage(vp)));
1125 V_offlineMessage(vp)[sizeof(V_offlineMessage(vp))-1] = '\0';
1126 vp->goingOffline = 1;
1128 vp = VGetVolume_r(&error, vid); /* Wait for it to go offline */
1129 if (vp) /* In case it was reattached... */
1133 void VOffline(Volume *vp, char *message)
1136 VOffline_r(vp, message);
1140 /* For VDetachVolume, we close all cached file descriptors, but keep
1141 * the Inode handles in case we need to read from a busy volume.
1143 static void VCloseVolumeHandles_r(Volume *vp)
1145 DFlushVolume(V_id(vp));
1146 VCloseVnodeFiles_r(vp);
1148 /* Too time consuming and unnecessary for the volserver */
1149 if (programType != volumeUtility) {
1150 IH_CONDSYNC(vp->vnodeIndex[vLarge].handle);
1151 IH_CONDSYNC(vp->vnodeIndex[vSmall].handle);
1152 IH_CONDSYNC(vp->diskDataHandle);
1154 IH_CONDSYNC(vp->linkHandle);
1155 #endif /* AFS_NT40_ENV */
1158 IH_REALLYCLOSE(vp->vnodeIndex[vLarge].handle);
1159 IH_REALLYCLOSE(vp->vnodeIndex[vSmall].handle);
1160 IH_REALLYCLOSE(vp->diskDataHandle);
1161 IH_REALLYCLOSE(vp->linkHandle);
1164 /* This gets used for the most part by utility routines that don't want
1165 * to keep all the volume headers around. Generally, the file server won't
1166 * call this routine, because then the offline message in the volume header
1167 * (or other information) will still be available to clients. For NAMEI, also
1168 * close the file handles.
1170 void VDetachVolume_r(Error *ec, Volume *vp)
1173 struct DiskPartition *tpartp;
1174 int notifyServer, useDone;
1176 *ec = 0; /* always "succeeds" */
1177 if (programType == volumeUtility) {
1178 notifyServer = vp->needsPutBack;
1179 useDone = (V_destroyMe(vp) == DESTROY_ME);
1181 tpartp = vp->partition;
1183 DeleteVolumeFromHashTable(vp);
1184 vp->shuttingDown = 1;
1186 /* Will be detached sometime in the future--this is OK since volume is offline */
1188 if (programType == volumeUtility && notifyServer) {
1190 * Note: The server is not notified in the case of a bogus volume
1191 * explicitly to make it possible to create a volume, do a partial
1192 * restore, then abort the operation without ever putting the volume
1193 * online. This is essential in the case of a volume move operation
1194 * between two partitions on the same server. In that case, there
1195 * would be two instances of the same volume, one of them bogus,
1196 * which the file server would attempt to put on line
1199 /* don't put online */
1200 FSYNC_askfs(volume, tpartp->name, FSYNC_DONE, 0);
1202 /* fs can use it again */
1203 FSYNC_askfs(volume, tpartp->name, FSYNC_ON, 0);
1204 /* Dettaching it so break all callbacks on it*/
1205 if (V_BreakVolumeCallbacks) {
1206 Log("volume %u detached; breaking all call backs\n", volume);
1207 (*V_BreakVolumeCallbacks)(volume);
1213 void VDetachVolume(Error *ec, Volume *vp)
1216 VDetachVolume_r(ec, vp);
1221 int VAllocBitmapEntry_r(Error *ec, Volume *vp, register struct vnodeIndex
1224 register byte *bp,*ep;
1226 /* This test is probably redundant */
1227 if (!VolumeWriteable(vp)) {
1232 if ((programType == fileServer) && !index->bitmap) {
1235 if (vp->specialStatus == VBUSY) {
1236 if (vp->goingOffline) { /* vos dump waiting for the volume to
1237 go offline. We probably come here
1238 from AddNewReadableResidency */
1242 while (vp->specialStatus == VBUSY)
1243 #ifdef AFS_PTHREAD_ENV
1245 #else /* AFS_PTHREAD_ENV */
1247 #endif /* AFS_PTHREAD_ENV */
1251 if (!index->bitmap) {
1252 vp->specialStatus = VBUSY; /* Stop anyone else from using it.*/
1253 for (i = 0; i<nVNODECLASSES; i++) {
1258 vp->specialStatus = 0;
1259 vp->shuttingDown = 1; /* Let who has it free it. */
1264 vp->specialStatus = 0; /* Allow others to have access. */
1267 #endif /* BITMAP_LATER */
1268 bp = index->bitmap + index->bitmapOffset;
1269 ep = index->bitmap + index->bitmapSize;
1271 if ((*(bit32 *)bp) != 0xffffffff) {
1273 index->bitmapOffset = bp - index->bitmap;
1276 o = ffs(~*bp)-1; /* ffs is documented in BSTRING(3) */
1278 return (bp - index->bitmap)*8 + o;
1280 bp += sizeof(bit32) /* i.e. 4 */;
1282 /* No bit map entry--must grow bitmap */
1284 realloc(index->bitmap, index->bitmapSize+VOLUME_BITMAP_GROWSIZE);
1287 bp += index->bitmapSize;
1288 memset(bp, 0, VOLUME_BITMAP_GROWSIZE);
1289 index->bitmapOffset = index->bitmapSize;
1290 index->bitmapSize += VOLUME_BITMAP_GROWSIZE;
1292 return index->bitmapOffset*8;
1295 int VAllocBitmapEntry(Error *ec, Volume *vp, register struct vnodeIndex *index)
1299 retVal = VAllocBitmapEntry_r(ec,vp,index);
1304 void VFreeBitMapEntry_r(Error *ec, register struct vnodeIndex *index,
1307 unsigned int offset;
1310 if (!index->bitmap) return;
1311 #endif /* BITMAP_LATER */
1312 offset = bitNumber>>3;
1313 if (offset >= index->bitmapSize) {
1317 if (offset < index->bitmapOffset)
1318 index->bitmapOffset = offset&~3; /* Truncate to nearest bit32 */
1319 *(index->bitmap + offset) &= ~(1 << (bitNumber & 0x7));
1322 void VFreeBitMapEntry(Error *ec, register struct vnodeIndex *index,
1326 VFreeBitMapEntry_r(ec, index, bitNumber);
1330 void VUpdateVolume_r(Error *ec,Volume *vp)
1333 if (programType == fileServer)
1334 V_uniquifier(vp) = (V_inUse(vp)? V_nextVnodeUnique(vp) + 200: V_nextVnodeUnique(vp));
1335 /*printf("Writing volume header for '%s'\n", V_name(vp));*/
1336 WriteVolumeHeader_r(ec, vp);
1339 "VUpdateVolume: error updating volume header, volume %u (%s)\n",
1340 V_id(vp), V_name(vp));
1341 VForceOffline_r(vp);
1345 void VUpdateVolume(Error *ec, Volume *vp)
1348 VUpdateVolume_r(ec, vp);
1352 void VSyncVolume_r(Error *ec, Volume *vp)
1355 VUpdateVolume_r(ec, vp);
1358 fdP = IH_OPEN(V_diskDataHandle(vp));
1359 assert(fdP != NULL);
1360 code = FDH_SYNC(fdP);
1366 void VSyncVolume(Error *ec, Volume *vp)
1369 VSyncVolume_r(ec, vp);
1373 static void FreeVolume(Volume *vp)
1378 for (i = 0; i<nVNODECLASSES; i++)
1379 if (vp->vnodeIndex[i].bitmap)
1380 free(vp->vnodeIndex[i].bitmap);
1381 FreeVolumeHeader(vp);
1382 DeleteVolumeFromHashTable(vp);
1386 static void GetBitmap(Error *ec, Volume *vp, VnodeClass class)
1388 StreamHandle_t *file;
1392 struct VnodeClassInfo *vcp = &VnodeClassInfo[class];
1393 struct vnodeIndex *vip = &vp->vnodeIndex[class];
1394 struct VnodeDiskObject *vnode;
1395 unsigned int unique = 0;
1399 #endif /* BITMAP_LATER */
1403 fdP = IH_OPEN(vip->handle);
1404 assert (fdP != NULL);
1405 file = FDH_FDOPEN(fdP, "r");
1406 assert (file != NULL);
1407 vnode = (VnodeDiskObject *) malloc(vcp->diskSize);
1408 assert(vnode != NULL);
1409 size = OS_SIZE(fdP->fd_fd);
1411 nVnodes = (size <= vcp->diskSize? 0: size-vcp->diskSize)
1413 vip->bitmapSize = ((nVnodes/8)+10)/4*4; /* The 10 is a little extra so
1414 a few files can be created in this volume,
1415 the whole thing is rounded up to nearest 4
1416 bytes, because the bit map allocator likes
1419 BitMap = (byte *) calloc(1, vip->bitmapSize);
1420 assert(BitMap != NULL);
1421 #else /* BITMAP_LATER */
1422 vip->bitmap = (byte *) calloc(1, vip->bitmapSize);
1423 assert(vip->bitmap != NULL);
1424 vip->bitmapOffset = 0;
1425 #endif /* BITMAP_LATER */
1426 if (STREAM_SEEK(file,vcp->diskSize,0) != -1) {
1428 for (bitNumber = 0; bitNumber < nVnodes+100; bitNumber++) {
1429 if (STREAM_READ(vnode, vcp->diskSize, 1, file) != 1)
1431 if (vnode->type != vNull) {
1432 if (vnode->vnodeMagic != vcp->magic) {
1433 Log("GetBitmap: addled vnode index in volume %s; volume needs salvage\n",
1439 *(BitMap + (bitNumber>>3)) |= (1 << (bitNumber & 0x7));
1440 #else /* BITMAP_LATER */
1441 *(vip->bitmap + (bitNumber>>3)) |= (1 << (bitNumber & 0x7));
1442 #endif /* BITMAP_LATER */
1443 if (unique <= vnode->uniquifier)
1444 unique = vnode->uniquifier + 1;
1446 #ifndef AFS_PTHREAD_ENV
1447 if ((bitNumber & 0x00ff) == 0x0ff) { /* every 256 iterations */
1450 #endif /* !AFS_PTHREAD_ENV */
1453 if (vp->nextVnodeUnique < unique) {
1454 Log("GetBitmap: bad volume uniquifier for volume %s; volume needs salvage\n", V_name(vp));
1457 /* Paranoia, partly justified--I think fclose after fdopen
1458 * doesn't seem to close fd. In any event, the documentation
1459 * doesn't specify, so it's safer to close it twice.
1465 /* There may have been a racing condition with some other thread, both
1466 * creating the bitmaps for this volume. If the other thread was faster
1467 * the pointer to bitmap should already be filled and we can free ours.
1469 if (vip->bitmap == NULL) {
1470 vip->bitmap = BitMap;
1471 vip->bitmapOffset = 0;
1473 free((byte *)BitMap);
1474 #endif /* BITMAP_LATER */
1477 static void GetVolumePath(Error *ec, VolId volumeId, char **partitionp,
1480 static char partition[VMAXPATHLEN], name[VMAXPATHLEN];
1481 char path[VMAXPATHLEN];
1483 struct DiskPartition *dp;
1487 sprintf(&name[1],VFORMAT,volumeId);
1488 for (dp = DiskPartitionList; dp; dp = dp->next) {
1490 strcpy(path, VPartitionPath(dp));
1492 if (stat(path,&status) == 0) {
1493 strcpy(partition, dp->name);
1500 *partitionp = *namep = NULL;
1503 *partitionp = partition;
1508 int VolumeNumber(char *name)
1512 return atoi(name+1);
1515 char *VolumeExternalName(VolumeId volumeId)
1517 static char name[15];
1518 sprintf(name,VFORMAT,volumeId);
1522 #if OPENAFS_VOL_STATS
1523 #define OneDay (86400) /* 24 hours' worth of seconds */
1525 #define OneDay (24*60*60) /* 24 hours */
1526 #endif /* OPENAFS_VOL_STATS */
1528 #define Midnight(date) ((date-TimeZoneCorrection)/OneDay*OneDay+TimeZoneCorrection)
1530 /*------------------------------------------------------------------------
1531 * [export] VAdjustVolumeStatistics
1534 * If we've passed midnight, we need to update all the day use
1535 * statistics as well as zeroing the detailed volume statistics
1536 * (if we are implementing them).
1539 * vp : Pointer to the volume structure describing the lucky
1540 * volume being considered for update.
1546 * Nothing interesting.
1550 *------------------------------------------------------------------------*/
1552 int VAdjustVolumeStatistics_r(register Volume *vp)
1554 unsigned int now = FT_ApproxTime();
1556 if (now - V_dayUseDate(vp) > OneDay) {
1559 ndays = (now - V_dayUseDate(vp)) / OneDay;
1560 for (i = 6; i>ndays-1; i--)
1561 V_weekUse(vp)[i] = V_weekUse(vp)[i-ndays];
1562 for (i = 0; i<ndays-1 && i<7; i++)
1563 V_weekUse(vp)[i] = 0;
1565 V_weekUse(vp)[ndays-1] = V_dayUse(vp);
1567 V_dayUseDate(vp) = Midnight(now);
1569 #if OPENAFS_VOL_STATS
1571 * All we need to do is bzero the entire VOL_STATS_BYTES of
1572 * the detailed volume statistics area.
1574 memset((char *)(V_stat_area(vp)), 0, VOL_STATS_BYTES);
1575 #endif /* OPENAFS_VOL_STATS */
1576 } /*It's been more than a day of collection*/
1579 * Always return happily.
1582 } /*VAdjustVolumeStatistics*/
1584 int VAdjustVolumeStatistics(register Volume *vp)
1588 retVal = VAdjustVolumeStatistics_r(vp);
1593 void VBumpVolumeUsage_r(register Volume *vp)
1595 unsigned int now = FT_ApproxTime();
1596 if (now - V_dayUseDate(vp) > OneDay)
1597 VAdjustVolumeStatistics_r(vp);
1599 * Save the volume header image to disk after every 128 bumps to dayUse.
1601 if ((V_dayUse(vp)++ & 127) == 0) {
1603 VUpdateVolume_r(&error, vp);
1607 void VBumpVolumeUsage(register Volume *vp)
1610 VBumpVolumeUsage_r(vp);
1614 void VSetDiskUsage_r(void)
1616 static int FifteenMinuteCounter = 0;
1619 /* NOTE: Don't attempt to access the partitions list until the
1620 initialization level indicates that all volumes are attached,
1621 which implies that all partitions are initialized. */
1622 #ifdef AFS_PTHREAD_ENV
1624 #else /* AFS_PTHREAD_ENV */
1626 #endif /* AFS_PTHREAD_ENV */
1629 VResetDiskUsage_r();
1630 if (++FifteenMinuteCounter == 3) {
1631 FifteenMinuteCounter = 0;
1636 void VSetDiskUsage(void)
1643 /* The number of minutes that a volume hasn't been updated before the
1644 * "Dont salvage" flag in the volume header will be turned on */
1645 #define SALVAGE_INTERVAL (10*60)
1647 static VolumeId *UpdateList; /* Pointer to array of Volume ID's */
1648 static int nUpdatedVolumes; /* Updated with entry in UpdateList, salvage after crash flag on */
1649 static int updateSize; /* number of entries possible */
1650 #define UPDATE_LIST_SIZE 100 /* size increment */
1652 void VAddToVolumeUpdateList_r(Error *ec, Volume *vp)
1655 vp->updateTime = FT_ApproxTime();
1656 if (V_dontSalvage(vp) == 0)
1658 V_dontSalvage(vp) = 0;
1659 VSyncVolume_r(ec, vp);
1663 updateSize = UPDATE_LIST_SIZE;
1664 UpdateList = (VolumeId *) malloc(sizeof (VolumeId) * updateSize);
1666 if (nUpdatedVolumes == updateSize) {
1667 updateSize += UPDATE_LIST_SIZE;
1668 UpdateList = (VolumeId *) realloc(UpdateList, sizeof (VolumeId) * updateSize);
1671 assert(UpdateList != NULL);
1672 UpdateList[nUpdatedVolumes++] = V_id(vp);
1675 static void VScanUpdateList() {
1676 register int i, gap;
1677 register Volume *vp;
1679 afs_int32 now = FT_ApproxTime();
1680 /* Be careful with this code, since it works with interleaved calls to AddToVolumeUpdateList */
1681 for (i = gap = 0; i<nUpdatedVolumes; i++) {
1682 vp = VGetVolume_r(&error, UpdateList[i-gap] = UpdateList[i]);
1685 } else if (vp->nUsers == 1 && now - vp->updateTime > SALVAGE_INTERVAL) {
1686 V_dontSalvage(vp) = DONT_SALVAGE;
1687 VUpdateVolume_r(&error, vp); /* No need to fsync--not critical */
1692 #ifndef AFS_PTHREAD_ENV
1694 #endif /* !AFS_PTHREAD_ENV */
1696 nUpdatedVolumes -= gap;
1699 /***************************************************/
1700 /* Add on routines to manage a volume header cache */
1701 /***************************************************/
1703 static struct volHeader *volumeLRU;
1705 /* Allocate a bunch of headers; string them together */
1706 static void InitLRU(int howMany)
1708 register struct volHeader *hp;
1709 if (programType != fileServer)
1711 hp = (struct volHeader *)(calloc(howMany, sizeof(struct volHeader)));
1713 ReleaseVolumeHeader(hp++);
1716 /* Get a volume header from the LRU list; update the old one if necessary */
1717 /* Returns 1 if there was already a header, which is removed from the LRU list */
1718 static int GetVolumeHeader(register Volume *vp)
1721 register struct volHeader *hd;
1723 static int everLogged = 0;
1725 old = (vp->header != 0); /* old == volume already has a header */
1726 if (programType != fileServer) {
1728 hd = (struct volHeader *) calloc(1, sizeof(*vp->header));
1737 if (volumeLRU == hd)
1738 volumeLRU = hd->next;
1739 assert(hd->back == vp);
1743 /* not currently in use and least recently used */
1744 hd = volumeLRU->prev;
1746 hd = (struct volHeader *) calloc(1, sizeof(*vp->header));
1747 /* make it look like single elt LRU */
1748 hd->prev = hd->next = hd;
1750 Log("****Allocated more volume headers, probably leak****\n");
1755 if (hd->diskstuff.inUse) {
1756 WriteVolumeHeader_r(&error, hd->back);
1757 /* Ignore errors; catch them later */
1759 hd->back->header = 0;
1764 if (hd->next) { /* hd->next != 0 --> in LRU chain (we zero it later) */
1765 hd->prev->next = hd->next; /* pull hd out of LRU list */
1766 hd->next->prev = hd->prev; /* if hd only element, this is noop */
1768 hd->next = hd->prev = 0;
1769 /* if not in LRU chain, next test won't be true */
1770 if (hd == volumeLRU) /* last header item, turn into empty list */
1776 /* Put it at the top of the LRU chain */
1777 static void ReleaseVolumeHeader(register struct volHeader *hd)
1779 if (programType != fileServer)
1781 if (!hd || hd->next) /* no header, or header already released */
1784 hd->next = hd->prev = hd;
1786 hd->prev = volumeLRU->prev;
1787 hd->next = volumeLRU;
1788 hd->prev->next = hd->next->prev = hd;
1793 static void FreeVolumeHeader(register Volume *vp)
1795 register struct volHeader *hd = vp->header;
1798 if (programType == fileServer) {
1799 ReleaseVolumeHeader(hd);
1809 /***************************************************/
1810 /* Routines to add volume to hash chain, delete it */
1811 /***************************************************/
1813 static void AddVolumeToHashTable(register Volume *vp, int hashid)
1815 int hash = VOLUME_HASH(hashid);
1816 vp->hashid = hashid;
1817 vp->hashNext = VolumeHashTable[hash];
1818 VolumeHashTable[hash] = vp;
1819 vp->vnodeHashOffset = VolumeHashOffset_r();
1822 static void DeleteVolumeFromHashTable(register Volume *vp)
1824 int hash = VOLUME_HASH(vp->hashid);
1825 if (VolumeHashTable[hash] == vp)
1826 VolumeHashTable[hash] = vp->hashNext;
1828 Volume *tvp = VolumeHashTable[hash];
1831 while (tvp->hashNext && tvp->hashNext != vp)
1832 tvp = tvp->hashNext;
1833 if (tvp->hashNext == NULL)
1835 tvp->hashNext = vp->hashNext;
1840 void VPrintCacheStats_r(void)
1842 register struct VnodeClassInfo *vcp;
1843 vcp = &VnodeClassInfo[vLarge];
1844 Log("Large vnode cache, %d entries, %d allocs, %d gets (%d reads), %d writes\n",
1845 vcp->cacheSize, vcp->allocs, vcp->gets, vcp->reads, vcp->writes);
1846 vcp = &VnodeClassInfo[vSmall];
1847 Log("Small vnode cache,%d entries, %d allocs, %d gets (%d reads), %d writes\n",
1848 vcp->cacheSize, vcp->allocs, vcp->gets, vcp->reads, vcp->writes);
1849 Log("Volume header cache, %d entries, %d gets, %d replacements\n",
1850 VolumeCacheSize, VolumeGets, VolumeReplacements);
1853 void VPrintCacheStats(void)
1856 VPrintCacheStats_r();