/* * Copyright 2000, International Business Machines Corporation and others. * All Rights Reserved. * * This software has been released under the terms of the IBM Public * License. For details, see the LICENSE file in the top-level source * directory or online at http://www.openafs.org/dl/license10.html */ /* * Implements: * afs_lookup * EvalMountPoint * afs_DoBulkStat */ #include #include "afs/param.h" RCSID ("$Header$"); #include "afs/sysincludes.h" /* Standard vendor system headers */ #include "afsincludes.h" /* Afs-based standard headers */ #include "afs/afs_stats.h" /* statistics */ #include "afs/afs_cbqueue.h" #include "afs/nfsclient.h" #include "afs/exporter.h" #include "afs/afs_osidnlc.h" extern struct DirEntry *afs_dir_GetBlob(); #ifdef AFS_LINUX22_ENV extern struct inode_operations afs_symlink_iops, afs_dir_iops; #endif afs_int32 afs_bkvolpref = 0; afs_int32 afs_bulkStatsDone; static int bulkStatCounter = 0; /* counter for bulk stat seq. numbers */ int afs_fakestat_enable = 0; /* 1: fakestat-all, 2: fakestat-crosscell */ /* this would be faster if it did comparison as int32word, but would be * dependant on byte-order and alignment, and I haven't figured out * what "@sys" is in binary... */ #define AFS_EQ_ATSYS(name) (((name)[0]=='@')&&((name)[1]=='s')&&((name)[2]=='y')&&((name)[3]=='s')&&(!(name)[4])) /* call under write lock, evaluate mvid field from a mt pt. * avc is the vnode of the mount point object; must be write-locked. * advc is the vnode of the containing directory (optional; if NULL and * EvalMountPoint succeeds, caller must initialize *avolpp->dotdot) * avolpp is where we return a pointer to the volume named by the mount pt, if success * areq is the identity of the caller. * * NOTE: this function returns a held volume structure in *volpp if it returns 0! */ int EvalMountPoint(register struct vcache *avc, struct vcache *advc, struct volume **avolpp, register struct vrequest *areq) { afs_int32 code; struct volume *tvp = 0; struct VenusFid tfid; struct cell *tcell; char *cpos, *volnamep; char type, *buf; afs_int32 prefetch; /* 1=>None 2=>RO 3=>BK */ afs_int32 mtptCell, assocCell = 0, hac = 0; afs_int32 samecell, roname, len; AFS_STATCNT(EvalMountPoint); #ifdef notdef if (avc->mvid && (avc->states & CMValid)) return 0; /* done while racing */ #endif *avolpp = NULL; code = afs_HandleLink(avc, areq); if (code) return code; /* Determine which cell and volume the mointpoint goes to */ type = avc->linkData[0]; /* '#'=>Regular '%'=>RW */ cpos = afs_strchr(&avc->linkData[1], ':'); /* if cell name present */ if (cpos) { volnamep = cpos + 1; *cpos = 0; tcell = afs_GetCellByName(&avc->linkData[1], READ_LOCK); *cpos = ':'; } else { volnamep = &avc->linkData[1]; tcell = afs_GetCell(avc->fid.Cell, READ_LOCK); } if (!tcell) return ENODEV; mtptCell = tcell->cellNum; /* The cell for the mountpoint */ if (tcell->lcellp) { hac = 1; /* has associated cell */ assocCell = tcell->lcellp->cellNum; /* The associated cell */ } afs_PutCell(tcell, READ_LOCK); /* Is volume name a ".backup" or ".readonly" name */ len = strlen(volnamep); roname = ((len > 9) && (strcmp(&volnamep[len - 9], ".readonly") == 0)) || ((len > 7) && (strcmp(&volnamep[len - 7], ".backup") == 0)); /* When we cross mountpoint, do we stay in the same cell */ samecell = (avc->fid.Cell == mtptCell) || (hac && (avc->fid.Cell == assocCell)); /* Decide whether to prefetch the BK, or RO. Also means we want the BK or * RO. * If this is a regular mountpoint with a RW volume name * - If BK preference is enabled AND we remain within the same cell AND * start from a BK volume, then we will want to prefetch the BK volume. * - If we cross a cell boundary OR start from a RO volume, then we will * want to prefetch the RO volume. */ if ((type == '#') && !roname) { if (afs_bkvolpref && samecell && (avc->states & CBackup)) prefetch = 3; /* Prefetch the BK */ else if (!samecell || (avc->states & CRO)) prefetch = 2; /* Prefetch the RO */ else prefetch = 1; /* Do not prefetch */ } else { prefetch = 1; /* Do not prefetch */ } /* Get the volume struct. Unless this volume name has ".readonly" or * ".backup" in it, this will get the volume struct for the RW volume. * The RO volume will be prefetched if requested (but not returned). */ tvp = afs_GetVolumeByName(volnamep, mtptCell, prefetch, areq, WRITE_LOCK); /* If no volume was found in this cell, try the associated linked cell */ if (!tvp && hac && areq->volumeError) { tvp = afs_GetVolumeByName(volnamep, assocCell, prefetch, areq, WRITE_LOCK); } /* Still not found. If we are looking for the RO, then perhaps the RW * doesn't exist? Try adding ".readonly" to volname and look for that. * Don't know why we do this. Would have still found it in above call - jpm. */ if (!tvp && (prefetch == 2) && len < AFS_SMALLOCSIZ - 10) { buf = (char *)osi_AllocSmallSpace(len + 10); strcpy(buf, volnamep); afs_strcat(buf, ".readonly"); tvp = afs_GetVolumeByName(buf, mtptCell, 1, areq, WRITE_LOCK); /* Try the associated linked cell if failed */ if (!tvp && hac && areq->volumeError) { tvp = afs_GetVolumeByName(buf, assocCell, 1, areq, WRITE_LOCK); } osi_FreeSmallSpace(buf); } if (!tvp) return ENODEV; /* Couldn't find the volume */ /* Don't cross mountpoint from a BK to a BK volume */ if ((avc->states & CBackup) && (tvp->states & VBackup)) { afs_PutVolume(tvp, WRITE_LOCK); return ENODEV; } /* If we want (prefetched) the BK and it exists, then drop the RW volume * and get the BK. * Otherwise, if we want (prefetched0 the RO and it exists, then drop the * RW volume and get the RO. * Otherwise, go with the RW. */ if ((prefetch == 3) && tvp->backVol) { tfid.Fid.Volume = tvp->backVol; /* remember BK volume */ tfid.Cell = tvp->cell; afs_PutVolume(tvp, WRITE_LOCK); /* release old volume */ tvp = afs_GetVolume(&tfid, areq, WRITE_LOCK); /* get the new one */ if (!tvp) return ENODEV; /* oops, can't do it */ } else if ((prefetch >= 2) && tvp->roVol) { tfid.Fid.Volume = tvp->roVol; /* remember RO volume */ tfid.Cell = tvp->cell; afs_PutVolume(tvp, WRITE_LOCK); /* release old volume */ tvp = afs_GetVolume(&tfid, areq, WRITE_LOCK); /* get the new one */ if (!tvp) return ENODEV; /* oops, can't do it */ } if (avc->mvid == 0) avc->mvid = (struct VenusFid *)osi_AllocSmallSpace(sizeof(struct VenusFid)); avc->mvid->Cell = tvp->cell; avc->mvid->Fid.Volume = tvp->volume; avc->mvid->Fid.Vnode = 1; avc->mvid->Fid.Unique = 1; avc->states |= CMValid; /* Used to: if the mount point is stored within a backup volume, * then we should only update the parent pointer information if * there's none already set, so as to avoid updating a volume's .. * info with something in an OldFiles directory. * * Next two lines used to be under this if: * * if (!(avc->states & CBackup) || tvp->dotdot.Fid.Volume == 0) * * Now: update mount point back pointer on every call, so that we handle * multiple mount points better. This way, when du tries to go back * via chddir(".."), it will end up exactly where it started, yet * cd'ing via a new path to a volume will reset the ".." pointer * to the new path. */ tvp->mtpoint = avc->fid; /* setup back pointer to mtpoint */ if (advc) tvp->dotdot = advc->fid; *avolpp = tvp; return 0; } /* * afs_InitFakeStat * * Must be called on an afs_fakestat_state object before calling * afs_EvalFakeStat or afs_PutFakeStat. Calling afs_PutFakeStat * without calling afs_EvalFakeStat is legal, as long as this * function is called. */ void afs_InitFakeStat(struct afs_fakestat_state *state) { if (!afs_fakestat_enable) return; state->valid = 1; state->did_eval = 0; state->need_release = 0; } /* * afs_EvalFakeStat_int * * The actual implementation of afs_EvalFakeStat and afs_TryEvalFakeStat, * which is called by those wrapper functions. * * Only issues RPCs if canblock is non-zero. */ int afs_EvalFakeStat_int(struct vcache **avcp, struct afs_fakestat_state *state, struct vrequest *areq, int canblock) { struct vcache *tvc, *root_vp; struct volume *tvolp = NULL; int code = 0; if (!afs_fakestat_enable) return 0; osi_Assert(state->valid == 1); osi_Assert(state->did_eval == 0); state->did_eval = 1; tvc = *avcp; if (tvc->mvstat != 1) return 0; /* Is the call to VerifyVCache really necessary? */ code = afs_VerifyVCache(tvc, areq); if (code) goto done; if (canblock) { ObtainWriteLock(&tvc->lock, 599); code = EvalMountPoint(tvc, NULL, &tvolp, areq); ReleaseWriteLock(&tvc->lock); if (code) goto done; if (tvolp) { tvolp->dotdot = tvc->fid; tvolp->dotdot.Fid.Vnode = tvc->parentVnode; tvolp->dotdot.Fid.Unique = tvc->parentUnique; } } if (tvc->mvid && (tvc->states & CMValid)) { if (!canblock) { afs_int32 retry; do { retry = 0; ObtainWriteLock(&afs_xvcache, 597); root_vp = afs_FindVCache(tvc->mvid, &retry, 0); if (root_vp && retry) { ReleaseWriteLock(&afs_xvcache); afs_PutVCache(root_vp); } } while (root_vp && retry); ReleaseWriteLock(&afs_xvcache); } else { root_vp = afs_GetVCache(tvc->mvid, areq, NULL, NULL); } if (!root_vp) { code = canblock ? ENOENT : 0; goto done; } if (tvolp) { /* Is this always kosher? Perhaps we should instead use * NBObtainWriteLock to avoid potential deadlock. */ ObtainWriteLock(&root_vp->lock, 598); if (!root_vp->mvid) root_vp->mvid = osi_AllocSmallSpace(sizeof(struct VenusFid)); *root_vp->mvid = tvolp->dotdot; ReleaseWriteLock(&root_vp->lock); } state->need_release = 1; state->root_vp = root_vp; *avcp = root_vp; code = 0; } else { code = canblock ? ENOENT : 0; } done: if (tvolp) afs_PutVolume(tvolp, WRITE_LOCK); return code; } /* * afs_EvalFakeStat * * Automatically does the equivalent of EvalMountPoint for vcache entries * which are mount points. Remembers enough state to properly release * the volume root vcache when afs_PutFakeStat() is called. * * State variable must be initialized by afs_InitFakeState() beforehand. * * Returns 0 when everything succeeds and *avcp points to the vcache entry * that should be used for the real vnode operation. Returns non-zero if * something goes wrong and the error code should be returned to the user. */ int afs_EvalFakeStat(struct vcache **avcp, struct afs_fakestat_state *state, struct vrequest *areq) { return afs_EvalFakeStat_int(avcp, state, areq, 1); } /* * afs_TryEvalFakeStat * * Same as afs_EvalFakeStat, but tries not to talk to remote servers * and only evaluate the mount point if all the data is already in * local caches. * * Returns 0 if everything succeeds and *avcp points to a valid * vcache entry (possibly evaluated). */ int afs_TryEvalFakeStat(struct vcache **avcp, struct afs_fakestat_state *state, struct vrequest *areq) { return afs_EvalFakeStat_int(avcp, state, areq, 0); } /* * afs_PutFakeStat * * Perform any necessary cleanup at the end of a vnode op, given that * afs_InitFakeStat was previously called with this state. */ void afs_PutFakeStat(struct afs_fakestat_state *state) { if (!afs_fakestat_enable) return; osi_Assert(state->valid == 1); if (state->need_release) afs_PutVCache(state->root_vp); state->valid = 0; } int afs_ENameOK(register char *aname) { register int tlen; AFS_STATCNT(ENameOK); tlen = strlen(aname); if (tlen >= 4 && strcmp(aname + tlen - 4, "@sys") == 0) return 0; return 1; } static int afs_getsysname(register struct vrequest *areq, register struct vcache *adp, register char *bufp, int *num, char **sysnamelist[]) { register struct unixuser *au; register afs_int32 error; AFS_STATCNT(getsysname); *sysnamelist = afs_sysnamelist; if (!afs_nfsexporter) strcpy(bufp, (*sysnamelist)[0]); else { au = afs_GetUser(areq->uid, adp->fid.Cell, 0); if (au->exporter) { error = EXP_SYSNAME(au->exporter, (char *)0, sysnamelist, num); if (error) { strcpy(bufp, "@sys"); afs_PutUser(au, 0); return -1; } else { strcpy(bufp, (*sysnamelist)[0]); } } else strcpy(bufp, afs_sysname); afs_PutUser(au, 0); } return 0; } void Check_AtSys(register struct vcache *avc, const char *aname, struct sysname_info *state, struct vrequest *areq) { int num = 0; char **sysnamelist[MAXSYSNAME]; if (AFS_EQ_ATSYS(aname)) { state->offset = 0; state->name = (char *)osi_AllocLargeSpace(AFS_SMALLOCSIZ); state->allocked = 1; state->index = afs_getsysname(areq, avc, state->name, &num, sysnamelist); } else { state->offset = -1; state->allocked = 0; state->index = 0; state->name = (char *)aname; } } int Next_AtSys(register struct vcache *avc, struct vrequest *areq, struct sysname_info *state) { int num = afs_sysnamecount; char **sysnamelist[MAXSYSNAME]; if (state->index == -1) return 0; /* No list */ /* Check for the initial state of aname != "@sys" in Check_AtSys */ if (state->offset == -1 && state->allocked == 0) { register char *tname; /* Check for .*@sys */ for (tname = state->name; *tname; tname++) /*Move to the end of the string */ ; if ((tname > state->name + 4) && (AFS_EQ_ATSYS(tname - 4))) { state->offset = (tname - 4) - state->name; tname = (char *)osi_AllocLargeSpace(AFS_LRALLOCSIZ); strncpy(tname, state->name, state->offset); state->name = tname; state->allocked = 1; num = 0; state->index = afs_getsysname(areq, avc, state->name + state->offset, &num, sysnamelist); return 1; } else return 0; /* .*@sys doesn't match either */ } else { register struct unixuser *au; register afs_int32 error; *sysnamelist = afs_sysnamelist; if (afs_nfsexporter) { au = afs_GetUser(areq->uid, avc->fid.Cell, 0); if (au->exporter) { error = EXP_SYSNAME(au->exporter, (char *)0, sysnamelist, num); if (error) { return 0; } } afs_PutUser(au, 0); } if (++(state->index) >= num || !(*sysnamelist)[(unsigned int)state->index]) return 0; /* end of list */ } strcpy(state->name + state->offset, (*sysnamelist)[(unsigned int)state->index]); return 1; } extern int BlobScan(struct dcache * afile, afs_int32 ablob); /* called with an unlocked directory and directory cookie. Areqp * describes who is making the call. * Scans the next N (about 30, typically) directory entries, and does * a bulk stat call to stat them all. * * Must be very careful when merging in RPC responses, since we dont * want to overwrite newer info that was added by a file system mutating * call that ran concurrently with our bulk stat call. * * We do that, as described below, by not merging in our info (always * safe to skip the merge) if the status info is valid in the vcache entry. * * If adapt ever implements the bulk stat RPC, then this code will need to * ensure that vcaches created for failed RPC's to older servers have the * CForeign bit set. */ static struct vcache *BStvc = NULL; int afs_DoBulkStat(struct vcache *adp, long dirCookie, struct vrequest *areqp) { int nentries; /* # of entries to prefetch */ int nskip; /* # of slots in the LRU queue to skip */ struct vcache *lruvcp; /* vcache ptr of our goal pos in LRU queue */ struct dcache *dcp; /* chunk containing the dir block */ char *statMemp; /* status memory block */ char *cbfMemp; /* callback and fid memory block */ afs_size_t temp; /* temp for holding chunk length, &c. */ struct AFSFid *fidsp; /* file IDs were collecting */ struct AFSCallBack *cbsp; /* call back pointers */ struct AFSCallBack *tcbp; /* temp callback ptr */ struct AFSFetchStatus *statsp; /* file status info */ struct AFSVolSync volSync; /* vol sync return info */ struct vcache *tvcp; /* temp vcp */ struct afs_q *tq; /* temp queue variable */ AFSCBFids fidParm; /* file ID parm for bulk stat */ AFSBulkStats statParm; /* stat info parm for bulk stat */ int fidIndex = 0; /* which file were stating */ struct conn *tcp = 0; /* conn for call */ AFSCBs cbParm; /* callback parm for bulk stat */ struct server *hostp = 0; /* host we got callback from */ long startTime; /* time we started the call, * for callback expiration base */ afs_size_t statSeqNo = 0; /* Valued of file size to detect races */ int code; /* error code */ long newIndex; /* new index in the dir */ struct DirEntry *dirEntryp; /* dir entry we are examining */ int i; struct VenusFid afid; /* file ID we are using now */ struct VenusFid tfid; /* another temp. file ID */ afs_int32 retry; /* handle low-level SGI MP race conditions */ long volStates; /* flags from vol structure */ struct volume *volp = 0; /* volume ptr */ struct VenusFid dotdot; int flagIndex = 0; /* First file with bulk fetch flag set */ int inlinebulk = 0; /* Did we use InlineBulk RPC or not? */ XSTATS_DECLS; /* first compute some basic parameters. We dont want to prefetch more * than a fraction of the cache in any given call, and we want to preserve * a portion of the LRU queue in any event, so as to avoid thrashing * the entire stat cache (we will at least leave some of it alone). * presently dont stat more than 1/8 the cache in any one call. */ nentries = afs_cacheStats / 8; /* dont bother prefetching more than one calls worth of info */ if (nentries > AFSCBMAX) nentries = AFSCBMAX; /* heuristic to make sure that things fit in 4K. This means that * we shouldnt make it any bigger than 47 entries. I am typically * going to keep it a little lower, since we don't want to load * too much of the stat cache. */ if (nentries > 30) nentries = 30; /* now, to reduce the stack size, well allocate two 4K blocks, * one for fids and callbacks, and one for stat info. Well set * up our pointers to the memory from there, too. */ statMemp = osi_AllocLargeSpace(nentries * sizeof(AFSFetchStatus)); statsp = (struct AFSFetchStatus *)statMemp; cbfMemp = osi_AllocLargeSpace(nentries * (sizeof(AFSCallBack) + sizeof(AFSFid))); fidsp = (AFSFid *) cbfMemp; cbsp = (AFSCallBack *) (cbfMemp + nentries * sizeof(AFSFid)); /* next, we must iterate over the directory, starting from the specified * cookie offset (dirCookie), and counting out nentries file entries. * We skip files that already have stat cache entries, since we * dont want to bulk stat files that are already in the cache. */ tagain: code = afs_VerifyVCache(adp, areqp); if (code) goto done2; dcp = afs_GetDCache(adp, (afs_size_t) 0, areqp, &temp, &temp, 1); if (!dcp) { code = ENOENT; goto done2; } /* lock the directory cache entry */ ObtainReadLock(&adp->lock); ObtainReadLock(&dcp->lock); /* * Make sure that the data in the cache is current. There are two * cases we need to worry about: * 1. The cache data is being fetched by another process. * 2. The cache data is no longer valid */ while ((adp->states & CStatd) && (dcp->dflags & DFFetching) && hsame(adp->m.DataVersion, dcp->f.versionNo)) { afs_Trace4(afs_iclSetp, CM_TRACE_DCACHEWAIT, ICL_TYPE_STRING, __FILE__, ICL_TYPE_INT32, __LINE__, ICL_TYPE_POINTER, dcp, ICL_TYPE_INT32, dcp->dflags); ReleaseReadLock(&dcp->lock); ReleaseReadLock(&adp->lock); afs_osi_Sleep(&dcp->validPos); ObtainReadLock(&adp->lock); ObtainReadLock(&dcp->lock); } if (!(adp->states & CStatd) || !hsame(adp->m.DataVersion, dcp->f.versionNo)) { ReleaseReadLock(&dcp->lock); ReleaseReadLock(&adp->lock); afs_PutDCache(dcp); goto tagain; } /* Generate a sequence number so we can tell whether we should * store the attributes when processing the response. This number is * stored in the file size when we set the CBulkFetching bit. If the * CBulkFetching is still set and this value hasn't changed, then * we know we were the last to set CBulkFetching bit for this file, * and it is safe to set the status information for this file. */ statSeqNo = bulkStatCounter++; /* now we have dir data in the cache, so scan the dir page */ fidIndex = 0; flagIndex = 0; while (1) { /* Should probably have some constant bound */ /* look for first safe entry to examine in the directory. BlobScan * looks for a the 1st allocated dir after the dirCookie slot. */ newIndex = BlobScan(dcp, (dirCookie >> 5)); if (newIndex == 0) break; /* remember the updated directory cookie */ dirCookie = newIndex << 5; /* get a ptr to the dir entry */ dirEntryp = (struct DirEntry *)afs_dir_GetBlob(dcp, newIndex); if (!dirEntryp) break; /* dont copy more than we have room for */ if (fidIndex >= nentries) { DRelease((struct buffer *)dirEntryp, 0); break; } /* now, if the dir entry looks good, copy it out to our list. Vnode * 0 means deleted, although it should also be free were it deleted. */ if (dirEntryp->fid.vnode != 0) { /* dont copy entries we have in our cache. This check will * also make us skip "." and probably "..", unless it has * disappeared from the cache since we did our namei call. */ tfid.Cell = adp->fid.Cell; tfid.Fid.Volume = adp->fid.Fid.Volume; tfid.Fid.Vnode = ntohl(dirEntryp->fid.vnode); tfid.Fid.Unique = ntohl(dirEntryp->fid.vunique); do { retry = 0; ObtainWriteLock(&afs_xvcache, 130); tvcp = afs_FindVCache(&tfid, &retry, 0 /* no stats | LRU */ ); if (tvcp && retry) { ReleaseWriteLock(&afs_xvcache); afs_PutVCache(tvcp); } } while (tvcp && retry); if (!tvcp) { /* otherwise, create manually */ tvcp = afs_NewVCache(&tfid, hostp); ObtainWriteLock(&tvcp->lock, 505); ReleaseWriteLock(&afs_xvcache); afs_RemoveVCB(&tfid); ReleaseWriteLock(&tvcp->lock); } else { ReleaseWriteLock(&afs_xvcache); } if (!tvcp) goto done; /* can't happen at present, more's the pity */ /* WARNING: afs_DoBulkStat uses the Length field to store a * sequence number for each bulk status request. Under no * circumstances should afs_DoBulkStat store a sequence number * if the new length will be ignored when afs_ProcessFS is * called with new stats. */ #ifdef AFS_SGI_ENV if (!(tvcp->states & (CStatd | CBulkFetching)) && (tvcp->execsOrWriters <= 0) && !afs_DirtyPages(tvcp) && !AFS_VN_MAPPED((vnode_t *) tvcp)) #else if (!(tvcp->states & (CStatd | CBulkFetching)) && (tvcp->execsOrWriters <= 0) && !afs_DirtyPages(tvcp)) #endif { /* this entry doesnt exist in the cache, and is not * already being fetched by someone else, so add it to the * list of file IDs to obtain. * * We detect a callback breaking race condition by checking the * CBulkFetching state bit and the value in the file size. * It is safe to set the status only if the CBulkFetching * flag is still set and the value in the file size does * not change. * * Don't fetch status for dirty files. We need to * preserve the value of the file size. We could * flush the pages, but it wouldn't be worthwhile. */ memcpy((char *)(fidsp + fidIndex), (char *)&tfid.Fid, sizeof(*fidsp)); tvcp->states |= CBulkFetching; tvcp->m.Length = statSeqNo; fidIndex++; } afs_PutVCache(tvcp); } /* if dir vnode has non-zero entry */ /* move to the next dir entry by adding in the # of entries * used by this dir entry. */ temp = afs_dir_NameBlobs(dirEntryp->name) << 5; DRelease((struct buffer *)dirEntryp, 0); if (temp <= 0) break; dirCookie += temp; } /* while loop over all dir entries */ /* now release the dir lock and prepare to make the bulk RPC */ ReleaseReadLock(&dcp->lock); ReleaseReadLock(&adp->lock); /* release the chunk */ afs_PutDCache(dcp); /* dont make a null call */ if (fidIndex == 0) goto done; do { /* setup the RPC parm structures */ fidParm.AFSCBFids_len = fidIndex; fidParm.AFSCBFids_val = fidsp; statParm.AFSBulkStats_len = fidIndex; statParm.AFSBulkStats_val = statsp; cbParm.AFSCBs_len = fidIndex; cbParm.AFSCBs_val = cbsp; /* start the timer; callback expirations are relative to this */ startTime = osi_Time(); tcp = afs_Conn(&adp->fid, areqp, SHARED_LOCK); if (tcp) { hostp = tcp->srvr->server; XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_BULKSTATUS); RX_AFS_GUNLOCK(); if (!(tcp->srvr->server->flags & SNO_INLINEBULK)) { code = RXAFS_InlineBulkStatus(tcp->id, &fidParm, &statParm, &cbParm, &volSync); if (code == RXGEN_OPCODE) { tcp->srvr->server->flags |= SNO_INLINEBULK; inlinebulk = 0; code = RXAFS_BulkStatus(tcp->id, &fidParm, &statParm, &cbParm, &volSync); } else inlinebulk = 1; } else { inlinebulk = 0; code = RXAFS_BulkStatus(tcp->id, &fidParm, &statParm, &cbParm, &volSync); } RX_AFS_GLOCK(); XSTATS_END_TIME; } else code = -1; } while (afs_Analyze (tcp, code, &adp->fid, areqp, AFS_STATS_FS_RPCIDX_BULKSTATUS, SHARED_LOCK, NULL)); /* now, if we didnt get the info, bail out. */ if (code) goto done; /* we need vol flags to create the entries properly */ dotdot.Fid.Volume = 0; volp = afs_GetVolume(&adp->fid, areqp, READ_LOCK); if (volp) { volStates = volp->states; if (volp->dotdot.Fid.Volume != 0) dotdot = volp->dotdot; } else volStates = 0; /* find the place to merge the info into We do this by skipping * nskip entries in the LRU queue. The more we skip, the more * we preserve, since the head of the VLRU queue is the most recently * referenced file. */ reskip: nskip = afs_cacheStats / 2; /* preserved fraction of the cache */ ObtainReadLock(&afs_xvcache); if (QEmpty(&VLRU)) { /* actually a serious error, probably should panic. Probably will * panic soon, oh well. */ ReleaseReadLock(&afs_xvcache); afs_warnuser("afs_DoBulkStat: VLRU empty!"); goto done; } if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { refpanic("Bulkstat VLRU inconsistent"); } for (tq = VLRU.next; tq != &VLRU; tq = QNext(tq)) { if (--nskip <= 0) break; else if (QNext(QPrev(tq)) != tq) { BStvc = QTOV(tq); refpanic("BulkStat VLRU inconsistent"); } } if (tq != &VLRU) lruvcp = QTOV(tq); else lruvcp = QTOV(VLRU.next); /* now we have to hold this entry, so that it does not get moved * into the free list while we're running. It could still get * moved within the lru queue, but hopefully that will be rare; it * doesn't hurt nearly as much. */ retry = 0; osi_vnhold(lruvcp, &retry); ReleaseReadLock(&afs_xvcache); /* could be read lock */ if (retry) goto reskip; /* otherwise, merge in the info. We have to be quite careful here, * since we need to ensure that we don't merge old info over newer * stuff in a stat cache entry. We're very conservative here: we don't * do the merge at all unless we ourselves create the stat cache * entry. That's pretty safe, and should work pretty well, since we * typically expect to do the stat cache creation ourselves. * * We also have to take into account racing token revocations. */ for (i = 0; i < fidIndex; i++) { if ((&statsp[i])->errorCode) continue; afid.Cell = adp->fid.Cell; afid.Fid.Volume = adp->fid.Fid.Volume; afid.Fid.Vnode = fidsp[i].Vnode; afid.Fid.Unique = fidsp[i].Unique; do { retry = 0; ObtainReadLock(&afs_xvcache); tvcp = afs_FindVCache(&afid, &retry, 0 /* !stats&!lru */ ); ReleaseReadLock(&afs_xvcache); } while (tvcp && retry); /* The entry may no longer exist */ if (tvcp == NULL) { continue; } /* now we have the entry held, but we need to fill it in */ ObtainWriteLock(&tvcp->lock, 131); /* if CBulkFetching is not set, or if the file size no longer * matches the value we placed there when we set the CBulkFetching * flag, then someone else has done something with this node, * and we may not have the latest status information for this * file. Leave the entry alone. */ if (!(tvcp->states & CBulkFetching) || (tvcp->m.Length != statSeqNo)) { flagIndex++; ReleaseWriteLock(&tvcp->lock); afs_PutVCache(tvcp); continue; } /* now copy ".." entry back out of volume structure, if necessary */ if (tvcp->mvstat == 2 && (dotdot.Fid.Volume != 0)) { if (!tvcp->mvid) tvcp->mvid = (struct VenusFid *) osi_AllocSmallSpace(sizeof(struct VenusFid)); *tvcp->mvid = dotdot; } ObtainWriteLock(&afs_xvcache, 132); if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { refpanic("Bulkstat VLRU inconsistent2"); } if ((QNext(QPrev(&tvcp->vlruq)) != &tvcp->vlruq) || (QPrev(QNext(&tvcp->vlruq)) != &tvcp->vlruq)) { refpanic("Bulkstat VLRU inconsistent4"); } if ((QNext(QPrev(&lruvcp->vlruq)) != &lruvcp->vlruq) || (QPrev(QNext(&lruvcp->vlruq)) != &lruvcp->vlruq)) { refpanic("Bulkstat VLRU inconsistent5"); } if (tvcp != lruvcp) { /* if they are == don't move it, don't corrupt vlru */ QRemove(&tvcp->vlruq); QAdd(&lruvcp->vlruq, &tvcp->vlruq); } if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { refpanic("Bulkstat VLRU inconsistent3"); } if ((QNext(QPrev(&tvcp->vlruq)) != &tvcp->vlruq) || (QPrev(QNext(&tvcp->vlruq)) != &tvcp->vlruq)) { refpanic("Bulkstat VLRU inconsistent5"); } if ((QNext(QPrev(&lruvcp->vlruq)) != &lruvcp->vlruq) || (QPrev(QNext(&lruvcp->vlruq)) != &lruvcp->vlruq)) { refpanic("Bulkstat VLRU inconsistent6"); } ReleaseWriteLock(&afs_xvcache); ObtainWriteLock(&afs_xcbhash, 494); /* We need to check the flags again. We may have missed * something while we were waiting for a lock. */ if (!(tvcp->states & CBulkFetching) || (tvcp->m.Length != statSeqNo)) { flagIndex++; ReleaseWriteLock(&tvcp->lock); ReleaseWriteLock(&afs_xcbhash); afs_PutVCache(tvcp); continue; } /* now merge in the resulting status back into the vnode. * We only do this if the entry looks clear. */ afs_ProcessFS(tvcp, &statsp[i], areqp); #ifdef AFS_LINUX22_ENV /* overwrite the ops if it's a directory or symlink. */ if (vType(tvcp) == VDIR) tvcp->v.v_op = &afs_dir_iops; else if (vType(tvcp) == VLNK) tvcp->v.v_op = &afs_symlink_iops; #endif /* do some accounting for bulk stats: mark this entry as * loaded, so we can tell if we use it before it gets * recycled. */ tvcp->states |= CBulkStat; tvcp->states &= ~CBulkFetching; flagIndex++; afs_bulkStatsDone++; /* merge in vol info */ if (volStates & VRO) tvcp->states |= CRO; if (volStates & VBackup) tvcp->states |= CBackup; if (volStates & VForeign) tvcp->states |= CForeign; /* merge in the callback info */ tvcp->states |= CTruth; /* get ptr to the callback we are interested in */ tcbp = cbsp + i; if (tcbp->ExpirationTime != 0) { tvcp->cbExpires = tcbp->ExpirationTime + startTime; tvcp->callback = hostp; tvcp->states |= CStatd; afs_QueueCallback(tvcp, CBHash(tcbp->ExpirationTime), volp); } else if (tvcp->states & CRO) { /* ordinary callback on a read-only volume -- AFS 3.2 style */ tvcp->cbExpires = 3600 + startTime; tvcp->callback = hostp; tvcp->states |= CStatd; afs_QueueCallback(tvcp, CBHash(3600), volp); } else { tvcp->callback = 0; tvcp->states &= ~(CStatd | CUnique); afs_DequeueCallback(tvcp); if ((tvcp->states & CForeign) || (vType(tvcp) == VDIR)) osi_dnlc_purgedp(tvcp); /* if it (could be) a directory */ } ReleaseWriteLock(&afs_xcbhash); ReleaseWriteLock(&tvcp->lock); /* finally, we're done with the entry */ afs_PutVCache(tvcp); } /* for all files we got back */ /* finally return the pointer into the LRU queue */ afs_PutVCache(lruvcp); done: /* Be sure to turn off the CBulkFetching flags */ for (i = flagIndex; i < fidIndex; i++) { afid.Cell = adp->fid.Cell; afid.Fid.Volume = adp->fid.Fid.Volume; afid.Fid.Vnode = fidsp[i].Vnode; afid.Fid.Unique = fidsp[i].Unique; do { retry = 0; ObtainReadLock(&afs_xvcache); tvcp = afs_FindVCache(&afid, &retry, 0 /* !stats&!lru */ ); ReleaseReadLock(&afs_xvcache); } while (tvcp && retry); if (tvcp != NULL && (tvcp->states & CBulkFetching) && (tvcp->m.Length == statSeqNo)) { tvcp->states &= ~CBulkFetching; } if (tvcp != NULL) { afs_PutVCache(tvcp); } } if (volp) afs_PutVolume(volp, READ_LOCK); /* If we did the InlineBulk RPC pull out the return code */ if (inlinebulk) { if ((&statsp[0])->errorCode) { afs_Analyze(tcp, (&statsp[0])->errorCode, &adp->fid, areqp, AFS_STATS_FS_RPCIDX_BULKSTATUS, SHARED_LOCK, NULL); code = (&statsp[0])->errorCode; } } else { code = 0; } done2: osi_FreeLargeSpace(statMemp); osi_FreeLargeSpace(cbfMemp); return code; } /* was: (AFS_DEC_ENV) || defined(AFS_OSF30_ENV) || defined(AFS_NCR_ENV) */ static int AFSDOBULK = 1; int #ifdef AFS_OSF_ENV afs_lookup(OSI_VC_DECL(adp), char *aname, struct vcache **avcp, struct AFS_UCRED *acred, int opflag, int wantparent) #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) afs_lookup(OSI_VC_DECL(adp), char *aname, struct vcache **avcp, struct pathname *pnp, int flags, struct vnode *rdir, struct AFS_UCRED *acred) #elif defined(UKERNEL) afs_lookup(OSI_VC_DECL(adp), char *aname, struct vcache **avcp, struct AFS_UCRED *acred, int flags) #else afs_lookup(OSI_VC_DECL(adp), char *aname, struct vcache **avcp, struct AFS_UCRED *acred) #endif { struct vrequest treq; char *tname = NULL; register struct vcache *tvc = 0; register afs_int32 code; register afs_int32 bulkcode = 0; int pass = 0, hit = 0; long dirCookie; extern afs_int32 afs_mariner; /*Writing activity to log? */ afs_hyper_t versionNo; int no_read_access = 0; struct sysname_info sysState; /* used only for @sys checking */ int dynrootRetry = 1; struct afs_fakestat_state fakestate; int tryEvalOnly = 0; OSI_VC_CONVERT(adp); AFS_STATCNT(afs_lookup); afs_InitFakeStat(&fakestate); if ((code = afs_InitReq(&treq, acred))) goto done; #ifdef AFS_OSF_ENV ndp->ni_dvp = AFSTOV(adp); #endif /* AFS_OSF_ENV */ #if defined(AFS_DARWIN_ENV) /* Workaround for MacOSX Finder, which tries to look for * .DS_Store and Contents under every directory. */ if (afs_fakestat_enable && adp->mvstat == 1) { if (strcmp(aname, ".DS_Store") == 0) tryEvalOnly = 1; if (strcmp(aname, "Contents") == 0) tryEvalOnly = 1; } #endif if (tryEvalOnly) code = afs_TryEvalFakeStat(&adp, &fakestate, &treq); else code = afs_EvalFakeStat(&adp, &fakestate, &treq); if (tryEvalOnly && adp->mvstat == 1) code = ENOENT; if (code) goto done; *avcp = NULL; /* Since some callers don't initialize it */ /* come back to here if we encounter a non-existent object in a read-only * volume's directory */ redo: *avcp = NULL; /* Since some callers don't initialize it */ bulkcode = 0; if (!(adp->states & CStatd)) { if ((code = afs_VerifyVCache2(adp, &treq))) { goto done; } } else code = 0; /* watch for ".." in a volume root */ if (adp->mvstat == 2 && aname[0] == '.' && aname[1] == '.' && !aname[2]) { /* looking up ".." in root via special hacks */ if (adp->mvid == (struct VenusFid *)0 || adp->mvid->Fid.Volume == 0) { #ifdef AFS_OSF_ENV extern struct vcache *afs_globalVp; if (adp == afs_globalVp) { struct vnode *rvp = AFSTOV(adp); /* ndp->ni_vp = rvp->v_vfsp->vfs_vnodecovered; ndp->ni_dvp = ndp->ni_vp; VN_HOLD(*avcp); */ code = ENODEV; goto done; } #endif code = ENODEV; goto done; } /* otherwise we have the fid here, so we use it */ tvc = afs_GetVCache(adp->mvid, &treq, NULL, NULL); afs_Trace3(afs_iclSetp, CM_TRACE_GETVCDOTDOT, ICL_TYPE_FID, adp->mvid, ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32, code); *avcp = tvc; code = (tvc ? 0 : ENOENT); hit = 1; if (tvc && !VREFCOUNT(tvc)) { osi_Panic("TT1"); } if (code) { /*printf("LOOKUP GETVCDOTDOT -> %d\n", code); */ } goto done; } /* now check the access */ if (treq.uid != adp->last_looker) { if (!afs_AccessOK(adp, PRSFS_LOOKUP, &treq, CHECK_MODE_BITS)) { *avcp = NULL; code = EACCES; goto done; } else adp->last_looker = treq.uid; } /* Check for read access as well. We need read access in order to * stat files, but not to stat subdirectories. */ if (!afs_AccessOK(adp, PRSFS_READ, &treq, CHECK_MODE_BITS)) no_read_access = 1; /* special case lookup of ".". Can we check for it sooner in this code, * for instance, way up before "redo:" ?? * I'm not fiddling with the LRUQ here, either, perhaps I should, or else * invent a lightweight version of GetVCache. */ if (aname[0] == '.' && !aname[1]) { /* special case */ ObtainReadLock(&afs_xvcache); osi_vnhold(adp, 0); ReleaseReadLock(&afs_xvcache); code = 0; *avcp = tvc = adp; hit = 1; if (adp && !VREFCOUNT(adp)) { osi_Panic("TT2"); } goto done; } Check_AtSys(adp, aname, &sysState, &treq); tname = sysState.name; /* 1st Check_AtSys and lookup by tname is required here, for now, * because the dnlc is *not* told to remove entries for the parent * dir of file/dir op that afs_LocalHero likes, but dnlc is informed * if the cached entry for the parent dir is invalidated for a * non-local change. * Otherwise, we'd be able to do a dnlc lookup on an entry ending * w/@sys and know the dnlc was consistent with reality. */ tvc = osi_dnlc_lookup(adp, tname, WRITE_LOCK); *avcp = tvc; /* maybe wasn't initialized, but it is now */ if (tvc) { if (no_read_access && vType(tvc) != VDIR && vType(tvc) != VLNK) { /* need read access on dir to stat non-directory / non-link */ afs_PutVCache(tvc); *avcp = NULL; code = EACCES; goto done; } #ifdef AFS_LINUX22_ENV if (tvc->mvstat == 2) { /* we don't trust the dnlc for root vcaches */ AFS_RELE(AFSTOV(tvc)); *avcp = 0; } else { code = 0; hit = 1; goto done; } #else /* non - LINUX */ code = 0; hit = 1; goto done; #endif /* linux22 */ } { /* sub-block just to reduce stack usage */ register struct dcache *tdc; afs_size_t dirOffset, dirLen; struct VenusFid tfid; /* now we have to lookup the next fid */ tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq, &dirOffset, &dirLen, 1); if (!tdc) { *avcp = NULL; /* redundant, but harmless */ code = EIO; goto done; } /* now we will just call dir package with appropriate inode. * Dirs are always fetched in their entirety for now */ ObtainReadLock(&adp->lock); ObtainReadLock(&tdc->lock); /* * Make sure that the data in the cache is current. There are two * cases we need to worry about: * 1. The cache data is being fetched by another process. * 2. The cache data is no longer valid */ while ((adp->states & CStatd) && (tdc->dflags & DFFetching) && hsame(adp->m.DataVersion, tdc->f.versionNo)) { ReleaseReadLock(&tdc->lock); ReleaseReadLock(&adp->lock); afs_osi_Sleep(&tdc->validPos); ObtainReadLock(&adp->lock); ObtainReadLock(&tdc->lock); } if (!(adp->states & CStatd) || !hsame(adp->m.DataVersion, tdc->f.versionNo)) { ReleaseReadLock(&tdc->lock); ReleaseReadLock(&adp->lock); afs_PutDCache(tdc); if (tname && tname != aname) osi_FreeLargeSpace(tname); goto redo; } /* Save the version number for when we call osi_dnlc_enter */ hset(versionNo, tdc->f.versionNo); /* * check for, and handle "@sys" if it's there. We should be able * to avoid the alloc and the strcpy with a little work, but it's * not pressing. If there aren't any remote users (ie, via the * NFS translator), we have a slightly easier job. * the faster way to do this is to check for *aname == '@' and if * it's there, check for @sys, otherwise, assume there's no @sys * then, if the lookup fails, check for .*@sys... */ /* above now implemented by Check_AtSys and Next_AtSys */ /* lookup the name in the appropriate dir, and return a cache entry * on the resulting fid */ code = afs_dir_LookupOffset(tdc, sysState.name, &tfid.Fid, &dirCookie); /* If the first lookup doesn't succeed, maybe it's got @sys in the name */ while (code == ENOENT && Next_AtSys(adp, &treq, &sysState)) code = afs_dir_LookupOffset(tdc, sysState.name, &tfid.Fid, &dirCookie); tname = sysState.name; ReleaseReadLock(&tdc->lock); afs_PutDCache(tdc); if (code == ENOENT && afs_IsDynroot(adp) && dynrootRetry) { ReleaseReadLock(&adp->lock); dynrootRetry = 0; if (tname[0] == '.') afs_LookupAFSDB(tname + 1); else afs_LookupAFSDB(tname); if (tname && tname != aname) osi_FreeLargeSpace(tname); goto redo; } else { ReleaseReadLock(&adp->lock); } /* new fid has same cell and volume */ tfid.Cell = adp->fid.Cell; tfid.Fid.Volume = adp->fid.Fid.Volume; afs_Trace4(afs_iclSetp, CM_TRACE_LOOKUP, ICL_TYPE_POINTER, adp, ICL_TYPE_STRING, tname, ICL_TYPE_FID, &tfid, ICL_TYPE_INT32, code); if (code) { if (code != ENOENT) { printf("LOOKUP dirLookupOff -> %d\n", code); } goto done; } /* prefetch some entries, if the dir is currently open. The variable * dirCookie tells us where to start prefetching from. */ if (AFSDOBULK && adp->opens > 0 && !(adp->states & CForeign) && !afs_IsDynroot(adp)) { afs_int32 retry; /* if the entry is not in the cache, or is in the cache, * but hasn't been statd, then do a bulk stat operation. */ do { retry = 0; ObtainReadLock(&afs_xvcache); tvc = afs_FindVCache(&tfid, &retry, 0 /* !stats,!lru */ ); ReleaseReadLock(&afs_xvcache); } while (tvc && retry); if (!tvc || !(tvc->states & CStatd)) bulkcode = afs_DoBulkStat(adp, dirCookie, &treq); else bulkcode = 0; /* if the vcache isn't usable, release it */ if (tvc && !(tvc->states & CStatd)) { afs_PutVCache(tvc); tvc = NULL; } } else { tvc = NULL; bulkcode = 0; } /* now get the status info, if we don't already have it */ /* This is kind of weird, but we might wind up accidentally calling * RXAFS_Lookup because we happened upon a file which legitimately * has a 0 uniquifier. That is the result of allowing unique to wrap * to 0. This was fixed in AFS 3.4. For CForeign, Unique == 0 means that * the file has not yet been looked up. */ if (!tvc) { afs_int32 cached = 0; if (!tfid.Fid.Unique && (adp->states & CForeign)) { tvc = afs_LookupVCache(&tfid, &treq, &cached, adp, tname); } if (!tvc && !bulkcode) { /* lookup failed or wasn't called */ tvc = afs_GetVCache(&tfid, &treq, &cached, NULL); } } /* if !tvc */ } /* sub-block just to reduce stack usage */ if (tvc) { int force_eval = afs_fakestat_enable ? 0 : 1; if (adp->states & CForeign) tvc->states |= CForeign; tvc->parentVnode = adp->fid.Fid.Vnode; tvc->parentUnique = adp->fid.Fid.Unique; tvc->states &= ~CBulkStat; if (afs_fakestat_enable == 2 && tvc->mvstat == 1) { ObtainSharedLock(&tvc->lock, 680); if (!tvc->linkData) { UpgradeSToWLock(&tvc->lock, 681); code = afs_HandleLink(tvc, &treq); ConvertWToRLock(&tvc->lock); } else { ConvertSToRLock(&tvc->lock); code = 0; } if (!code && !afs_strchr(tvc->linkData, ':')) force_eval = 1; ReleaseReadLock(&tvc->lock); } #if defined(UKERNEL) && defined(AFS_WEB_ENHANCEMENTS) if (!(flags & AFS_LOOKUP_NOEVAL)) /* don't eval mount points */ #endif /* UKERNEL && AFS_WEB_ENHANCEMENTS */ if (tvc->mvstat == 1 && force_eval) { /* a mt point, possibly unevaluated */ struct volume *tvolp; ObtainWriteLock(&tvc->lock, 133); code = EvalMountPoint(tvc, adp, &tvolp, &treq); ReleaseWriteLock(&tvc->lock); if (code) { afs_PutVCache(tvc); if (tvolp) afs_PutVolume(tvolp, WRITE_LOCK); goto done; } /* next, we want to continue using the target of the mt point */ if (tvc->mvid && (tvc->states & CMValid)) { struct vcache *uvc; /* now lookup target, to set .. pointer */ afs_Trace2(afs_iclSetp, CM_TRACE_LOOKUP1, ICL_TYPE_POINTER, tvc, ICL_TYPE_FID, &tvc->fid); uvc = tvc; /* remember for later */ if (tvolp && (tvolp->states & VForeign)) { /* XXXX tvolp has ref cnt on but not locked! XXX */ tvc = afs_GetRootVCache(tvc->mvid, &treq, NULL, tvolp); } else { tvc = afs_GetVCache(tvc->mvid, &treq, NULL, NULL); } afs_PutVCache(uvc); /* we're done with it */ if (!tvc) { code = ENOENT; if (tvolp) { afs_PutVolume(tvolp, WRITE_LOCK); } goto done; } /* now, if we came via a new mt pt (say because of a new * release of a R/O volume), we must reevaluate the .. * ptr to point back to the appropriate place */ if (tvolp) { ObtainWriteLock(&tvc->lock, 134); if (tvc->mvid == NULL) { tvc->mvid = (struct VenusFid *) osi_AllocSmallSpace(sizeof(struct VenusFid)); } /* setup backpointer */ *tvc->mvid = tvolp->dotdot; ReleaseWriteLock(&tvc->lock); afs_PutVolume(tvolp, WRITE_LOCK); } } else { afs_PutVCache(tvc); code = ENOENT; if (tvolp) afs_PutVolume(tvolp, WRITE_LOCK); goto done; } } *avcp = tvc; if (tvc && !VREFCOUNT(tvc)) { osi_Panic("TT3"); } code = 0; } else { /* if we get here, we found something in a directory that couldn't * be located (a Multics "connection failure"). If the volume is * read-only, we try flushing this entry from the cache and trying * again. */ if (pass == 0) { struct volume *tv; tv = afs_GetVolume(&adp->fid, &treq, READ_LOCK); if (tv) { if (tv->states & VRO) { pass = 1; /* try this *once* */ ObtainWriteLock(&afs_xcbhash, 495); afs_DequeueCallback(adp); /* re-stat to get later version */ adp->states &= ~CStatd; ReleaseWriteLock(&afs_xcbhash); osi_dnlc_purgedp(adp); afs_PutVolume(tv, READ_LOCK); goto redo; } afs_PutVolume(tv, READ_LOCK); } } code = ENOENT; } done: /* put the network buffer back, if need be */ if (tname != aname && tname) osi_FreeLargeSpace(tname); if (code == 0) { #ifdef AFS_OSF_ENV /* Handle RENAME; only need to check rename "." */ if (opflag == RENAME && wantparent && *ndp->ni_next == 0) { if (!FidCmp(&(tvc->fid), &(adp->fid))) { afs_PutVCache(*avcp); *avcp = NULL; afs_PutFakeStat(&fakestate); return afs_CheckCode(EISDIR, &treq, 18); } } #endif /* AFS_OSF_ENV */ if (afs_mariner) afs_AddMarinerName(aname, tvc); #if defined(UKERNEL) && defined(AFS_WEB_ENHANCEMENTS) if (!(flags & AFS_LOOKUP_NOEVAL)) /* Here we don't enter the name into the DNLC because we want the * evaluated mount dir to be there (the vcache for the mounted volume) * rather than the vc of the mount point itself. we can still find the * mount point's vc in the vcache by its fid. */ #endif /* UKERNEL && AFS_WEB_ENHANCEMENTS */ if (!hit) { osi_dnlc_enter(adp, aname, tvc, &versionNo); } else { #ifdef AFS_LINUX20_ENV /* So Linux inode cache is up to date. */ code = afs_VerifyVCache(tvc, &treq); #else afs_PutFakeStat(&fakestate); return 0; /* can't have been any errors if hit and !code */ #endif } } if (bulkcode) code = bulkcode; else code = afs_CheckCode(code, &treq, 19); if (code) { /* If there is an error, make sure *avcp is null. * Alphas panic otherwise - defect 10719. */ *avcp = NULL; } afs_PutFakeStat(&fakestate); return code; }