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
17 #include <afsconfig.h>
18 #include "afs/param.h"
20 #include "afs/sysincludes.h" /* Standard vendor system headers */
21 #include "afsincludes.h" /* Afs-based standard headers */
22 #include "afs/afs_stats.h" /* statistics */
23 #include "afs/afs_cbqueue.h"
24 #include "afs/nfsclient.h"
25 #include "afs/exporter.h"
26 #include "afs/afs_osidnlc.h"
27 #include "afs/afs_dynroot.h"
29 extern struct vcache *afs_globalVp;
31 afs_int32 afs_bkvolpref = 0;
32 afs_int32 afs_bulkStatsDone;
33 static int bulkStatCounter = 0; /* counter for bulk stat seq. numbers */
34 int afs_fakestat_enable = 0; /* 1: fakestat-all, 2: fakestat-crosscell */
37 /* this would be faster if it did comparison as int32word, but would be
38 * dependant on byte-order and alignment, and I haven't figured out
39 * what "@sys" is in binary... */
40 #define AFS_EQ_ATSYS(name) (((name)[0]=='@')&&((name)[1]=='s')&&((name)[2]=='y')&&((name)[3]=='s')&&(!(name)[4]))
42 /* call under write lock, evaluate mvid field from a mt pt.
43 * avc is the vnode of the mount point object; must be write-locked.
44 * advc is the vnode of the containing directory (optional; if NULL and
45 * EvalMountPoint succeeds, caller must initialize *avolpp->dotdot)
46 * avolpp is where we return a pointer to the volume named by the mount pt, if success
47 * areq is the identity of the caller.
49 * NOTE: this function returns a held volume structure in *volpp if it returns 0!
52 EvalMountData(char type, char *data, afs_uint32 states, afs_uint32 cellnum,
53 struct volume **avolpp, register struct vrequest *areq,
54 afs_uint32 *acellidxp, afs_uint32 *avolnump, afs_uint32 *avnoidp)
56 struct volume *tvp = 0;
59 char *cpos, *volnamep, *x;
61 afs_int32 prefetch; /* 1=>None 2=>RO 3=>BK */
62 afs_int32 mtptCell, assocCell = 0, hac = 0;
63 afs_int32 samecell, roname, len;
64 afs_uint32 volid, cellidx, vnoid = 0;
66 cpos = afs_strchr(data, ':'); /* if cell name present */
71 for (x = data; *x >= '0' && *x <= '9'; x++)
72 cellnum = (cellnum * 10) + (*x - '0');
74 tcell = afs_GetCell(cellnum, READ_LOCK);
76 tcell = afs_GetCellByName(data, READ_LOCK);
82 tcell = afs_GetCell(cellnum, READ_LOCK);
84 /*printf("No cellname %s , or cellnum %d , returning ENODEV\n",
89 /*printf("Lookup failed, returning ENODEV\n");*/
93 cellidx = tcell->cellIndex;
94 mtptCell = tcell->cellNum; /* The cell for the mountpoint */
96 hac = 1; /* has associated cell */
97 assocCell = tcell->lcellp->cellNum; /* The associated cell */
99 afs_PutCell(tcell, READ_LOCK);
101 cpos = afs_strrchr(volnamep, ':'); /* if vno present */
104 /* Look for an all-numeric volume ID */
106 for (x = volnamep; *x >= '0' && *x <= '9'; x++)
107 volid = (volid * 10) + (*x - '0');
111 if (!*x) /* allow vno with numeric volid only */
112 for (x = (cpos + 1); *x >= '0' && *x <= '9'; x++)
113 vnoid = (vnoid * 10) + (*x - '0');
119 * If the volume ID was all-numeric, and they didn't ask for a
120 * pointer to the volume structure, then just return the number
121 * as-is. This is currently only used for handling name lookups
122 * in the dynamic mount directory.
124 if (!*x && !avolpp) {
126 *acellidxp = cellidx;
135 * If the volume ID was all-numeric, and the type was '%', then
136 * assume whoever made the mount point knew what they were doing,
137 * and don't second-guess them by forcing use of a RW volume when
138 * they gave the ID of something else.
140 if (!*x && type == '%') {
141 tfid.Fid.Volume = volid; /* remember BK volume */
142 tfid.Cell = mtptCell;
143 tvp = afs_GetVolume(&tfid, areq, WRITE_LOCK); /* get the new one */
145 /*printf("afs_GetVolume failed - returning ENODEV");*/
146 return ENODEV; /* oops, can't do it */
151 /* Is volume name a "<n>.backup" or "<n>.readonly" name */
152 len = strlen(volnamep);
153 roname = ((len > 9) && (strcmp(&volnamep[len - 9], ".readonly") == 0))
154 || ((len > 7) && (strcmp(&volnamep[len - 7], ".backup") == 0));
156 /* When we cross mountpoint, do we stay in the same cell */
157 samecell = (cellnum == mtptCell) || (hac && (cellnum == assocCell));
159 /* Decide whether to prefetch the BK, or RO. Also means we want the BK or
161 * If this is a regular mountpoint with a RW volume name
162 * - If BK preference is enabled AND we remain within the same cell AND
163 * start from a BK volume, then we will want to prefetch the BK volume.
164 * - If we cross a cell boundary OR start from a RO volume, then we will
165 * want to prefetch the RO volume.
167 if ((type == '#') && !roname) {
168 if (afs_bkvolpref && samecell && (states & CBackup))
169 prefetch = 3; /* Prefetch the BK */
170 else if (!samecell || (states & CRO))
171 prefetch = 2; /* Prefetch the RO */
173 prefetch = 1; /* Do not prefetch */
175 prefetch = 1; /* Do not prefetch */
178 /* Get the volume struct. Unless this volume name has ".readonly" or
179 * ".backup" in it, this will get the volume struct for the RW volume.
180 * The RO volume will be prefetched if requested (but not returned).
182 /*printf("Calling GetVolumeByName\n");*/
183 tvp = afs_GetVolumeByName(volnamep, mtptCell, prefetch, areq, WRITE_LOCK);
185 /* If no volume was found in this cell, try the associated linked cell */
186 if (!tvp && hac && areq->volumeError) {
188 afs_GetVolumeByName(volnamep, assocCell, prefetch, areq,
192 /* Still not found. If we are looking for the RO, then perhaps the RW
193 * doesn't exist? Try adding ".readonly" to volname and look for that.
194 * Don't know why we do this. Would have still found it in above call - jpm.
196 if (!tvp && (prefetch == 2) && len < AFS_SMALLOCSIZ - 10) {
197 buf = (char *)osi_AllocSmallSpace(len + 10);
199 strcpy(buf, volnamep);
200 afs_strcat(buf, ".readonly");
202 tvp = afs_GetVolumeByName(buf, mtptCell, 1, areq, WRITE_LOCK);
204 /* Try the associated linked cell if failed */
205 if (!tvp && hac && areq->volumeError) {
206 tvp = afs_GetVolumeByName(buf, assocCell, 1, areq, WRITE_LOCK);
208 osi_FreeSmallSpace(buf);
212 /*printf("Couldn't find the volume\n");*/
213 return ENODEV; /* Couldn't find the volume */
216 /* Don't cross mountpoint from a BK to a BK volume */
217 if ((states & CBackup) && (tvp->states & VBackup)) {
218 afs_PutVolume(tvp, WRITE_LOCK);
222 /* If we want (prefetched) the BK and it exists, then drop the RW volume
224 * Otherwise, if we want (prefetched0 the RO and it exists, then drop the
225 * RW volume and get the RO.
226 * Otherwise, go with the RW.
228 if ((prefetch == 3) && tvp->backVol) {
229 tfid.Fid.Volume = tvp->backVol; /* remember BK volume */
230 tfid.Cell = tvp->cell;
231 afs_PutVolume(tvp, WRITE_LOCK); /* release old volume */
232 tvp = afs_GetVolume(&tfid, areq, WRITE_LOCK); /* get the new one */
234 return ENODEV; /* oops, can't do it */
235 } else if ((prefetch >= 2) && tvp->roVol) {
236 tfid.Fid.Volume = tvp->roVol; /* remember RO volume */
237 tfid.Cell = tvp->cell;
238 afs_PutVolume(tvp, WRITE_LOCK); /* release old volume */
239 tvp = afs_GetVolume(&tfid, areq, WRITE_LOCK); /* get the new one */
241 return ENODEV; /* oops, can't do it */
246 *acellidxp = cellidx;
248 *avolnump = tvp->volume;
254 afs_PutVolume(tvp, WRITE_LOCK);
259 EvalMountPoint(register struct vcache *avc, struct vcache *advc,
260 struct volume **avolpp, register struct vrequest *areq)
265 AFS_STATCNT(EvalMountPoint);
267 if (avc->mvid && (avc->f.states & CMValid))
268 return 0; /* done while racing */
271 code = afs_HandleLink(avc, areq);
275 /* Determine which cell and volume the mointpoint goes to */
276 code = EvalMountData(avc->linkData[0], avc->linkData + 1,
277 avc->f.states, avc->f.fid.Cell, avolpp, areq, 0, 0,
279 if (code) return code;
286 (struct VenusFid *)osi_AllocSmallSpace(sizeof(struct VenusFid));
287 avc->mvid->Cell = (*avolpp)->cell;
288 avc->mvid->Fid.Volume = (*avolpp)->volume;
289 avc->mvid->Fid.Vnode = avnoid;
290 avc->mvid->Fid.Unique = 1;
291 avc->f.states |= CMValid;
293 /* Used to: if the mount point is stored within a backup volume,
294 * then we should only update the parent pointer information if
295 * there's none already set, so as to avoid updating a volume's ..
296 * info with something in an OldFiles directory.
298 * Next two lines used to be under this if:
300 * if (!(avc->f.states & CBackup) || tvp->dotdot.Fid.Volume == 0)
302 * Now: update mount point back pointer on every call, so that we handle
303 * multiple mount points better. This way, when du tries to go back
304 * via chddir(".."), it will end up exactly where it started, yet
305 * cd'ing via a new path to a volume will reset the ".." pointer
308 (*avolpp)->mtpoint = avc->f.fid; /* setup back pointer to mtpoint */
311 (*avolpp)->dotdot = advc->f.fid;
319 * Must be called on an afs_fakestat_state object before calling
320 * afs_EvalFakeStat or afs_PutFakeStat. Calling afs_PutFakeStat
321 * without calling afs_EvalFakeStat is legal, as long as this
322 * function is called.
325 afs_InitFakeStat(struct afs_fakestat_state *state)
327 if (!afs_fakestat_enable)
332 state->need_release = 0;
336 * afs_EvalFakeStat_int
338 * The actual implementation of afs_EvalFakeStat and afs_TryEvalFakeStat,
339 * which is called by those wrapper functions.
341 * Only issues RPCs if canblock is non-zero.
344 afs_EvalFakeStat_int(struct vcache **avcp, struct afs_fakestat_state *state,
345 struct vrequest *areq, int canblock)
347 struct vcache *tvc, *root_vp;
348 struct volume *tvolp = NULL;
351 if (!afs_fakestat_enable)
354 osi_Assert(state->valid == 1);
355 osi_Assert(state->did_eval == 0);
359 if (tvc->mvstat != 1)
362 /* Is the call to VerifyVCache really necessary? */
363 code = afs_VerifyVCache(tvc, areq);
367 ObtainWriteLock(&tvc->lock, 599);
368 code = EvalMountPoint(tvc, NULL, &tvolp, areq);
369 ReleaseWriteLock(&tvc->lock);
373 tvolp->dotdot = tvc->f.fid;
374 tvolp->dotdot.Fid.Vnode = tvc->f.parent.vnode;
375 tvolp->dotdot.Fid.Unique = tvc->f.parent.unique;
378 if (tvc->mvid && (tvc->f.states & CMValid)) {
384 ObtainWriteLock(&afs_xvcache, 597);
385 root_vp = afs_FindVCache(tvc->mvid, &retry, IS_WLOCK);
386 if (root_vp && retry) {
387 ReleaseWriteLock(&afs_xvcache);
388 afs_PutVCache(root_vp);
390 } while (root_vp && retry);
391 ReleaseWriteLock(&afs_xvcache);
393 root_vp = afs_GetVCache(tvc->mvid, areq, NULL, NULL);
396 code = canblock ? ENOENT : 0;
399 #ifdef AFS_DARWIN80_ENV
400 root_vp->f.m.Type = VDIR;
402 code = afs_darwin_finalizevnode(root_vp, NULL, NULL, 0);
405 vnode_ref(AFSTOV(root_vp));
407 if (tvolp && !afs_InReadDir(root_vp)) {
408 /* Is this always kosher? Perhaps we should instead use
409 * NBObtainWriteLock to avoid potential deadlock.
411 ObtainWriteLock(&root_vp->lock, 598);
413 root_vp->mvid = osi_AllocSmallSpace(sizeof(struct VenusFid));
414 *root_vp->mvid = tvolp->dotdot;
415 ReleaseWriteLock(&root_vp->lock);
417 state->need_release = 1;
418 state->root_vp = root_vp;
422 code = canblock ? ENOENT : 0;
427 afs_PutVolume(tvolp, WRITE_LOCK);
434 * Automatically does the equivalent of EvalMountPoint for vcache entries
435 * which are mount points. Remembers enough state to properly release
436 * the volume root vcache when afs_PutFakeStat() is called.
438 * State variable must be initialized by afs_InitFakeState() beforehand.
440 * Returns 0 when everything succeeds and *avcp points to the vcache entry
441 * that should be used for the real vnode operation. Returns non-zero if
442 * something goes wrong and the error code should be returned to the user.
445 afs_EvalFakeStat(struct vcache **avcp, struct afs_fakestat_state *state,
446 struct vrequest *areq)
448 return afs_EvalFakeStat_int(avcp, state, areq, 1);
452 * afs_TryEvalFakeStat
454 * Same as afs_EvalFakeStat, but tries not to talk to remote servers
455 * and only evaluate the mount point if all the data is already in
458 * Returns 0 if everything succeeds and *avcp points to a valid
459 * vcache entry (possibly evaluated).
462 afs_TryEvalFakeStat(struct vcache **avcp, struct afs_fakestat_state *state,
463 struct vrequest *areq)
465 return afs_EvalFakeStat_int(avcp, state, areq, 0);
471 * Perform any necessary cleanup at the end of a vnode op, given that
472 * afs_InitFakeStat was previously called with this state.
475 afs_PutFakeStat(struct afs_fakestat_state *state)
477 if (!afs_fakestat_enable)
480 osi_Assert(state->valid == 1);
481 if (state->need_release)
482 afs_PutVCache(state->root_vp);
487 afs_ENameOK(register char *aname)
491 AFS_STATCNT(ENameOK);
492 tlen = strlen(aname);
493 if (tlen >= 4 && strcmp(aname + tlen - 4, "@sys") == 0)
499 afs_getsysname(register struct vrequest *areq, register struct vcache *adp,
500 register char *bufp, int *num, char **sysnamelist[])
502 register struct unixuser *au;
503 register afs_int32 error;
505 AFS_STATCNT(getsysname);
507 *sysnamelist = afs_sysnamelist;
509 if (!afs_nfsexporter)
510 strcpy(bufp, (*sysnamelist)[0]);
512 au = afs_GetUser(areq->uid, adp->f.fid.Cell, 0);
514 error = EXP_SYSNAME(au->exporter, (char *)0, sysnamelist, num, 0);
516 strcpy(bufp, "@sys");
520 strcpy(bufp, (*sysnamelist)[0]);
523 strcpy(bufp, afs_sysname);
530 Check_AtSys(register struct vcache *avc, const char *aname,
531 struct sysname_info *state, struct vrequest *areq)
534 char **sysnamelist[MAXNUMSYSNAMES];
536 if (AFS_EQ_ATSYS(aname)) {
538 state->name = (char *)osi_AllocLargeSpace(MAXSYSNAME);
541 afs_getsysname(areq, avc, state->name, &num, sysnamelist);
546 state->name = (char *)aname;
551 Next_AtSys(register struct vcache *avc, struct vrequest *areq,
552 struct sysname_info *state)
554 int num = afs_sysnamecount;
555 char **sysnamelist[MAXNUMSYSNAMES];
557 if (state->index == -1)
558 return 0; /* No list */
560 /* Check for the initial state of aname != "@sys" in Check_AtSys */
561 if (state->offset == -1 && state->allocked == 0) {
562 register char *tname;
564 /* Check for .*@sys */
565 for (tname = state->name; *tname; tname++)
566 /*Move to the end of the string */ ;
568 if ((tname > state->name + 4) && (AFS_EQ_ATSYS(tname - 4))) {
569 state->offset = (tname - 4) - state->name;
570 tname = (char *)osi_AllocLargeSpace(AFS_LRALLOCSIZ);
571 strncpy(tname, state->name, state->offset);
576 afs_getsysname(areq, avc, state->name + state->offset, &num,
580 return 0; /* .*@sys doesn't match either */
582 register struct unixuser *au;
583 register afs_int32 error;
585 *sysnamelist = afs_sysnamelist;
587 if (afs_nfsexporter) {
588 au = afs_GetUser(areq->uid, avc->f.fid.Cell, 0);
591 EXP_SYSNAME(au->exporter, (char *)0, sysnamelist, &num, 0);
599 if (++(state->index) >= num || !(*sysnamelist)[(unsigned int)state->index])
600 return 0; /* end of list */
602 strcpy(state->name + state->offset, (*sysnamelist)[(unsigned int)state->index]);
606 extern int BlobScan(struct dcache * afile, afs_int32 ablob);
608 /* called with an unlocked directory and directory cookie. Areqp
609 * describes who is making the call.
610 * Scans the next N (about 30, typically) directory entries, and does
611 * a bulk stat call to stat them all.
613 * Must be very careful when merging in RPC responses, since we dont
614 * want to overwrite newer info that was added by a file system mutating
615 * call that ran concurrently with our bulk stat call.
617 * We do that, as described below, by not merging in our info (always
618 * safe to skip the merge) if the status info is valid in the vcache entry.
620 * If adapt ever implements the bulk stat RPC, then this code will need to
621 * ensure that vcaches created for failed RPC's to older servers have the
624 static struct vcache *BStvc = NULL;
627 afs_DoBulkStat(struct vcache *adp, long dirCookie, struct vrequest *areqp)
629 int nentries; /* # of entries to prefetch */
630 int nskip; /* # of slots in the LRU queue to skip */
631 struct vcache *lruvcp; /* vcache ptr of our goal pos in LRU queue */
632 struct dcache *dcp; /* chunk containing the dir block */
633 afs_size_t temp; /* temp for holding chunk length, &c. */
634 struct AFSFid *fidsp; /* file IDs were collecting */
635 struct AFSCallBack *cbsp; /* call back pointers */
636 struct AFSCallBack *tcbp; /* temp callback ptr */
637 struct AFSFetchStatus *statsp; /* file status info */
638 struct AFSVolSync volSync; /* vol sync return info */
639 struct vcache *tvcp; /* temp vcp */
640 struct afs_q *tq; /* temp queue variable */
641 AFSCBFids fidParm; /* file ID parm for bulk stat */
642 AFSBulkStats statParm; /* stat info parm for bulk stat */
643 int fidIndex = 0; /* which file were stating */
644 struct afs_conn *tcp = 0; /* conn for call */
645 AFSCBs cbParm; /* callback parm for bulk stat */
646 struct server *hostp = 0; /* host we got callback from */
647 long startTime; /* time we started the call,
648 * for callback expiration base
650 afs_size_t statSeqNo = 0; /* Valued of file size to detect races */
651 int code; /* error code */
652 long newIndex; /* new index in the dir */
653 struct DirEntry *dirEntryp; /* dir entry we are examining */
655 struct VenusFid afid; /* file ID we are using now */
656 struct VenusFid tfid; /* another temp. file ID */
657 afs_int32 retry; /* handle low-level SGI MP race conditions */
658 long volStates; /* flags from vol structure */
659 struct volume *volp = 0; /* volume ptr */
660 struct VenusFid dotdot = {0, {0, 0, 0}};
661 int flagIndex = 0; /* First file with bulk fetch flag set */
662 int inlinebulk = 0; /* Did we use InlineBulk RPC or not? */
665 dotdot.Fid.Unique = 0;
666 dotdot.Fid.Vnode = 0;
667 #ifdef AFS_DARWIN80_ENV
668 panic("bulkstatus doesn't work on AFS_DARWIN80_ENV. don't call it");
670 /* first compute some basic parameters. We dont want to prefetch more
671 * than a fraction of the cache in any given call, and we want to preserve
672 * a portion of the LRU queue in any event, so as to avoid thrashing
673 * the entire stat cache (we will at least leave some of it alone).
674 * presently dont stat more than 1/8 the cache in any one call. */
675 nentries = afs_cacheStats / 8;
677 /* dont bother prefetching more than one calls worth of info */
678 if (nentries > AFSCBMAX)
681 /* heuristic to make sure that things fit in 4K. This means that
682 * we shouldnt make it any bigger than 47 entries. I am typically
683 * going to keep it a little lower, since we don't want to load
684 * too much of the stat cache.
689 /* now, to reduce the stack size, well allocate two 4K blocks,
690 * one for fids and callbacks, and one for stat info. Well set
691 * up our pointers to the memory from there, too.
693 statsp = (AFSFetchStatus *)
694 osi_Alloc(AFSCBMAX * sizeof(AFSFetchStatus));
695 fidsp = (AFSFid *) osi_AllocLargeSpace(nentries * sizeof(AFSFid));
696 cbsp = (AFSCallBack *)
697 osi_Alloc(AFSCBMAX * sizeof(AFSCallBack));
699 /* next, we must iterate over the directory, starting from the specified
700 * cookie offset (dirCookie), and counting out nentries file entries.
701 * We skip files that already have stat cache entries, since we
702 * dont want to bulk stat files that are already in the cache.
705 code = afs_VerifyVCache(adp, areqp);
709 dcp = afs_GetDCache(adp, (afs_size_t) 0, areqp, &temp, &temp, 1);
715 /* lock the directory cache entry */
716 ObtainReadLock(&adp->lock);
717 ObtainReadLock(&dcp->lock);
720 * Make sure that the data in the cache is current. There are two
721 * cases we need to worry about:
722 * 1. The cache data is being fetched by another process.
723 * 2. The cache data is no longer valid
725 while ((adp->f.states & CStatd)
726 && (dcp->dflags & DFFetching)
727 && hsame(adp->f.m.DataVersion, dcp->f.versionNo)) {
728 afs_Trace4(afs_iclSetp, CM_TRACE_DCACHEWAIT, ICL_TYPE_STRING,
729 __FILE__, ICL_TYPE_INT32, __LINE__, ICL_TYPE_POINTER, dcp,
730 ICL_TYPE_INT32, dcp->dflags);
731 ReleaseReadLock(&dcp->lock);
732 ReleaseReadLock(&adp->lock);
733 afs_osi_Sleep(&dcp->validPos);
734 ObtainReadLock(&adp->lock);
735 ObtainReadLock(&dcp->lock);
737 if (!(adp->f.states & CStatd)
738 || !hsame(adp->f.m.DataVersion, dcp->f.versionNo)) {
739 ReleaseReadLock(&dcp->lock);
740 ReleaseReadLock(&adp->lock);
745 /* Generate a sequence number so we can tell whether we should
746 * store the attributes when processing the response. This number is
747 * stored in the file size when we set the CBulkFetching bit. If the
748 * CBulkFetching is still set and this value hasn't changed, then
749 * we know we were the last to set CBulkFetching bit for this file,
750 * and it is safe to set the status information for this file.
752 statSeqNo = bulkStatCounter++;
754 /* now we have dir data in the cache, so scan the dir page */
757 while (1) { /* Should probably have some constant bound */
758 /* look for first safe entry to examine in the directory. BlobScan
759 * looks for a the 1st allocated dir after the dirCookie slot.
761 newIndex = BlobScan(dcp, (dirCookie >> 5));
765 /* remember the updated directory cookie */
766 dirCookie = newIndex << 5;
768 /* get a ptr to the dir entry */
770 (struct DirEntry *)afs_dir_GetBlob(dcp, newIndex);
774 /* dont copy more than we have room for */
775 if (fidIndex >= nentries) {
776 DRelease(dirEntryp, 0);
780 /* now, if the dir entry looks good, copy it out to our list. Vnode
781 * 0 means deleted, although it should also be free were it deleted.
783 if (dirEntryp->fid.vnode != 0) {
784 /* dont copy entries we have in our cache. This check will
785 * also make us skip "." and probably "..", unless it has
786 * disappeared from the cache since we did our namei call.
788 tfid.Cell = adp->f.fid.Cell;
789 tfid.Fid.Volume = adp->f.fid.Fid.Volume;
790 tfid.Fid.Vnode = ntohl(dirEntryp->fid.vnode);
791 tfid.Fid.Unique = ntohl(dirEntryp->fid.vunique);
794 ObtainWriteLock(&afs_xvcache, 130);
795 tvcp = afs_FindVCache(&tfid, &retry, IS_WLOCK /* no stats | LRU */ );
797 ReleaseWriteLock(&afs_xvcache);
800 } while (tvcp && retry);
801 if (!tvcp) { /* otherwise, create manually */
802 tvcp = afs_NewVCache(&tfid, hostp);
805 ObtainWriteLock(&tvcp->lock, 505);
806 ReleaseWriteLock(&afs_xvcache);
807 afs_RemoveVCB(&tfid);
808 ReleaseWriteLock(&tvcp->lock);
810 ReleaseWriteLock(&afs_xvcache);
813 ReleaseWriteLock(&afs_xvcache);
817 DRelease(dirEntryp, 0);
818 ReleaseReadLock(&dcp->lock);
819 ReleaseReadLock(&adp->lock);
821 goto done; /* can happen if afs_NewVCache fails */
824 #ifdef AFS_DARWIN80_ENV
825 if (tvcp->f.states & CVInit) {
826 /* XXX don't have status yet, so creating the vnode is
827 not yet useful. we would get CDeadVnode set, and the
828 upcoming PutVCache will cause the vcache to be flushed &
829 freed, which in turn means the bulkstatus results won't
833 /* WARNING: afs_DoBulkStat uses the Length field to store a
834 * sequence number for each bulk status request. Under no
835 * circumstances should afs_DoBulkStat store a sequence number
836 * if the new length will be ignored when afs_ProcessFS is
837 * called with new stats. */
839 if (!(tvcp->f.states & (CStatd | CBulkFetching))
840 && (tvcp->execsOrWriters <= 0)
841 && !afs_DirtyPages(tvcp)
842 && !AFS_VN_MAPPED((vnode_t *) tvcp))
844 if (!(tvcp->f.states & (CStatd | CBulkFetching))
845 && (tvcp->execsOrWriters <= 0)
846 && !afs_DirtyPages(tvcp))
850 /* this entry doesnt exist in the cache, and is not
851 * already being fetched by someone else, so add it to the
852 * list of file IDs to obtain.
854 * We detect a callback breaking race condition by checking the
855 * CBulkFetching state bit and the value in the file size.
856 * It is safe to set the status only if the CBulkFetching
857 * flag is still set and the value in the file size does
860 * Don't fetch status for dirty files. We need to
861 * preserve the value of the file size. We could
862 * flush the pages, but it wouldn't be worthwhile.
864 memcpy((char *)(fidsp + fidIndex), (char *)&tfid.Fid,
866 tvcp->f.states |= CBulkFetching;
867 tvcp->f.m.Length = statSeqNo;
873 /* if dir vnode has non-zero entry */
874 /* move to the next dir entry by adding in the # of entries
875 * used by this dir entry.
877 temp = afs_dir_NameBlobs(dirEntryp->name) << 5;
878 DRelease(dirEntryp, 0);
882 } /* while loop over all dir entries */
884 /* now release the dir lock and prepare to make the bulk RPC */
885 ReleaseReadLock(&dcp->lock);
886 ReleaseReadLock(&adp->lock);
888 /* release the chunk */
891 /* dont make a null call */
896 /* setup the RPC parm structures */
897 fidParm.AFSCBFids_len = fidIndex;
898 fidParm.AFSCBFids_val = fidsp;
899 statParm.AFSBulkStats_len = fidIndex;
900 statParm.AFSBulkStats_val = statsp;
901 cbParm.AFSCBs_len = fidIndex;
902 cbParm.AFSCBs_val = cbsp;
904 /* start the timer; callback expirations are relative to this */
905 startTime = osi_Time();
907 tcp = afs_Conn(&adp->f.fid, areqp, SHARED_LOCK);
909 hostp = tcp->srvr->server;
910 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_BULKSTATUS);
913 if (!(tcp->srvr->server->flags & SNO_INLINEBULK)) {
915 RXAFS_InlineBulkStatus(tcp->id, &fidParm, &statParm,
917 if (code == RXGEN_OPCODE) {
918 tcp->srvr->server->flags |= SNO_INLINEBULK;
921 RXAFS_BulkStatus(tcp->id, &fidParm, &statParm,
928 RXAFS_BulkStatus(tcp->id, &fidParm, &statParm, &cbParm,
936 (tcp, code, &adp->f.fid, areqp, AFS_STATS_FS_RPCIDX_BULKSTATUS,
939 /* now, if we didnt get the info, bail out. */
943 /* we need vol flags to create the entries properly */
944 dotdot.Fid.Volume = 0;
945 volp = afs_GetVolume(&adp->f.fid, areqp, READ_LOCK);
947 volStates = volp->states;
948 if (volp->dotdot.Fid.Volume != 0)
949 dotdot = volp->dotdot;
953 /* find the place to merge the info into We do this by skipping
954 * nskip entries in the LRU queue. The more we skip, the more
955 * we preserve, since the head of the VLRU queue is the most recently
959 nskip = afs_cacheStats / 2; /* preserved fraction of the cache */
960 ObtainReadLock(&afs_xvcache);
962 /* actually a serious error, probably should panic. Probably will
963 * panic soon, oh well. */
964 ReleaseReadLock(&afs_xvcache);
965 afs_warnuser("afs_DoBulkStat: VLRU empty!");
968 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
969 refpanic("Bulkstat VLRU inconsistent");
971 for (tq = VLRU.next; tq != &VLRU; tq = QNext(tq)) {
974 else if (QNext(QPrev(tq)) != tq) {
976 refpanic("BulkStat VLRU inconsistent");
982 lruvcp = QTOV(VLRU.next);
984 /* now we have to hold this entry, so that it does not get moved
985 * into the free list while we're running. It could still get
986 * moved within the lru queue, but hopefully that will be rare; it
987 * doesn't hurt nearly as much.
990 osi_vnhold(lruvcp, &retry);
991 ReleaseReadLock(&afs_xvcache); /* could be read lock */
995 /* otherwise, merge in the info. We have to be quite careful here,
996 * since we need to ensure that we don't merge old info over newer
997 * stuff in a stat cache entry. We're very conservative here: we don't
998 * do the merge at all unless we ourselves create the stat cache
999 * entry. That's pretty safe, and should work pretty well, since we
1000 * typically expect to do the stat cache creation ourselves.
1002 * We also have to take into account racing token revocations.
1004 for (i = 0; i < fidIndex; i++) {
1005 if ((&statsp[i])->errorCode)
1007 afid.Cell = adp->f.fid.Cell;
1008 afid.Fid.Volume = adp->f.fid.Fid.Volume;
1009 afid.Fid.Vnode = fidsp[i].Vnode;
1010 afid.Fid.Unique = fidsp[i].Unique;
1013 ObtainReadLock(&afs_xvcache);
1014 tvcp = afs_FindVCache(&afid, &retry, 0 /* !stats&!lru */ );
1015 ReleaseReadLock(&afs_xvcache);
1016 } while (tvcp && retry);
1018 /* The entry may no longer exist */
1023 /* now we have the entry held, but we need to fill it in */
1024 ObtainWriteLock(&tvcp->lock, 131);
1026 /* if CBulkFetching is not set, or if the file size no longer
1027 * matches the value we placed there when we set the CBulkFetching
1028 * flag, then someone else has done something with this node,
1029 * and we may not have the latest status information for this
1030 * file. Leave the entry alone.
1032 if (!(tvcp->f.states & CBulkFetching) || (tvcp->f.m.Length != statSeqNo)) {
1034 ReleaseWriteLock(&tvcp->lock);
1035 afs_PutVCache(tvcp);
1039 /* now copy ".." entry back out of volume structure, if necessary */
1040 if (tvcp->mvstat == 2 && (dotdot.Fid.Volume != 0)) {
1042 tvcp->mvid = (struct VenusFid *)
1043 osi_AllocSmallSpace(sizeof(struct VenusFid));
1044 *tvcp->mvid = dotdot;
1047 ObtainWriteLock(&afs_xvcache, 132);
1048 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1049 refpanic("Bulkstat VLRU inconsistent2");
1051 if ((QNext(QPrev(&tvcp->vlruq)) != &tvcp->vlruq)
1052 || (QPrev(QNext(&tvcp->vlruq)) != &tvcp->vlruq)) {
1053 refpanic("Bulkstat VLRU inconsistent4");
1055 if ((QNext(QPrev(&lruvcp->vlruq)) != &lruvcp->vlruq)
1056 || (QPrev(QNext(&lruvcp->vlruq)) != &lruvcp->vlruq)) {
1057 refpanic("Bulkstat VLRU inconsistent5");
1060 if (tvcp != lruvcp) { /* if they are == don't move it, don't corrupt vlru */
1061 QRemove(&tvcp->vlruq);
1062 QAdd(&lruvcp->vlruq, &tvcp->vlruq);
1065 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1066 refpanic("Bulkstat VLRU inconsistent3");
1068 if ((QNext(QPrev(&tvcp->vlruq)) != &tvcp->vlruq)
1069 || (QPrev(QNext(&tvcp->vlruq)) != &tvcp->vlruq)) {
1070 refpanic("Bulkstat VLRU inconsistent5");
1072 if ((QNext(QPrev(&lruvcp->vlruq)) != &lruvcp->vlruq)
1073 || (QPrev(QNext(&lruvcp->vlruq)) != &lruvcp->vlruq)) {
1074 refpanic("Bulkstat VLRU inconsistent6");
1076 ReleaseWriteLock(&afs_xvcache);
1078 ObtainWriteLock(&afs_xcbhash, 494);
1080 /* We need to check the flags again. We may have missed
1081 * something while we were waiting for a lock.
1083 if (!(tvcp->f.states & CBulkFetching) || (tvcp->f.m.Length != statSeqNo)) {
1085 ReleaseWriteLock(&tvcp->lock);
1086 ReleaseWriteLock(&afs_xcbhash);
1087 afs_PutVCache(tvcp);
1091 /* now merge in the resulting status back into the vnode.
1092 * We only do this if the entry looks clear.
1094 afs_ProcessFS(tvcp, &statsp[i], areqp);
1095 #if defined(AFS_LINUX22_ENV)
1096 afs_fill_inode(AFSTOV(tvcp), NULL); /* reset inode operations */
1099 /* do some accounting for bulk stats: mark this entry as
1100 * loaded, so we can tell if we use it before it gets
1103 tvcp->f.states |= CBulkStat;
1104 tvcp->f.states &= ~CBulkFetching;
1106 afs_bulkStatsDone++;
1108 /* merge in vol info */
1109 if (volStates & VRO)
1110 tvcp->f.states |= CRO;
1111 if (volStates & VBackup)
1112 tvcp->f.states |= CBackup;
1113 if (volStates & VForeign)
1114 tvcp->f.states |= CForeign;
1116 /* merge in the callback info */
1117 tvcp->f.states |= CTruth;
1119 /* get ptr to the callback we are interested in */
1122 if (tcbp->ExpirationTime != 0) {
1123 tvcp->cbExpires = tcbp->ExpirationTime + startTime;
1124 tvcp->callback = hostp;
1125 tvcp->f.states |= CStatd;
1126 afs_QueueCallback(tvcp, CBHash(tcbp->ExpirationTime), volp);
1127 } else if (tvcp->f.states & CRO) {
1128 /* ordinary callback on a read-only volume -- AFS 3.2 style */
1129 tvcp->cbExpires = 3600 + startTime;
1130 tvcp->callback = hostp;
1131 tvcp->f.states |= CStatd;
1132 afs_QueueCallback(tvcp, CBHash(3600), volp);
1135 tvcp->f.states &= ~(CStatd | CUnique);
1136 afs_DequeueCallback(tvcp);
1137 if ((tvcp->f.states & CForeign) || (vType(tvcp) == VDIR))
1138 osi_dnlc_purgedp(tvcp); /* if it (could be) a directory */
1140 ReleaseWriteLock(&afs_xcbhash);
1142 ReleaseWriteLock(&tvcp->lock);
1143 /* finally, we're done with the entry */
1144 afs_PutVCache(tvcp);
1145 } /* for all files we got back */
1147 /* finally return the pointer into the LRU queue */
1148 afs_PutVCache(lruvcp);
1151 /* Be sure to turn off the CBulkFetching flags */
1152 for (i = flagIndex; i < fidIndex; i++) {
1153 afid.Cell = adp->f.fid.Cell;
1154 afid.Fid.Volume = adp->f.fid.Fid.Volume;
1155 afid.Fid.Vnode = fidsp[i].Vnode;
1156 afid.Fid.Unique = fidsp[i].Unique;
1159 ObtainReadLock(&afs_xvcache);
1160 tvcp = afs_FindVCache(&afid, &retry, 0 /* !stats&!lru */ );
1161 ReleaseReadLock(&afs_xvcache);
1162 } while (tvcp && retry);
1163 if (tvcp != NULL && (tvcp->f.states & CBulkFetching)
1164 && (tvcp->f.m.Length == statSeqNo)) {
1165 tvcp->f.states &= ~CBulkFetching;
1168 afs_PutVCache(tvcp);
1172 afs_PutVolume(volp, READ_LOCK);
1174 /* If we did the InlineBulk RPC pull out the return code */
1175 if (inlinebulk && code == 0) {
1176 if ((&statsp[0])->errorCode) {
1177 afs_Analyze(tcp, (&statsp[0])->errorCode, &adp->f.fid, areqp,
1178 AFS_STATS_FS_RPCIDX_BULKSTATUS, SHARED_LOCK, NULL);
1179 code = (&statsp[0])->errorCode;
1185 osi_FreeLargeSpace((char *)fidsp);
1186 osi_Free((char *)statsp, AFSCBMAX * sizeof(AFSFetchStatus));
1187 osi_Free((char *)cbsp, AFSCBMAX * sizeof(AFSCallBack));
1191 /* was: (AFS_DEC_ENV) || defined(AFS_OSF30_ENV) || defined(AFS_NCR_ENV) */
1192 #ifdef AFS_DARWIN80_ENV
1195 static int AFSDOBULK = 1;
1199 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
1200 afs_lookup(OSI_VC_DECL(adp), char *aname, struct vcache **avcp, struct pathname *pnp, int flags, struct vnode *rdir, afs_ucred_t *acred)
1201 #elif defined(UKERNEL)
1202 afs_lookup(OSI_VC_DECL(adp), char *aname, struct vcache **avcp, afs_ucred_t *acred, int flags)
1204 afs_lookup(OSI_VC_DECL(adp), char *aname, struct vcache **avcp, afs_ucred_t *acred)
1207 struct vrequest treq;
1209 register struct vcache *tvc = 0;
1210 register afs_int32 code;
1211 register afs_int32 bulkcode = 0;
1212 int pass = 0, hit = 0;
1213 int force_eval = afs_fakestat_enable ? 0 : 1;
1215 extern afs_int32 afs_mariner; /*Writing activity to log? */
1216 afs_hyper_t versionNo;
1217 int no_read_access = 0;
1218 struct sysname_info sysState; /* used only for @sys checking */
1219 int dynrootRetry = 1;
1220 struct afs_fakestat_state fakestate;
1221 int tryEvalOnly = 0;
1222 OSI_VC_CONVERT(adp);
1224 AFS_STATCNT(afs_lookup);
1225 afs_InitFakeStat(&fakestate);
1229 if ((code = afs_InitReq(&treq, acred)))
1232 if (afs_fakestat_enable && adp->mvstat == 1) {
1233 if (strcmp(aname, ".directory") == 0)
1237 #if defined(AFS_DARWIN_ENV)
1238 /* Workaround for MacOSX Finder, which tries to look for
1239 * .DS_Store and Contents under every directory.
1241 if (afs_fakestat_enable && adp->mvstat == 1) {
1242 if (strcmp(aname, ".DS_Store") == 0)
1244 if (strcmp(aname, "Contents") == 0)
1247 if (afs_fakestat_enable && adp->mvstat == 2) {
1248 if (strncmp(aname, "._", 2) == 0)
1254 code = afs_TryEvalFakeStat(&adp, &fakestate, &treq);
1256 code = afs_EvalFakeStat(&adp, &fakestate, &treq);
1258 /*printf("Code is %d\n", code);*/
1260 if (tryEvalOnly && adp->mvstat == 1)
1265 *avcp = NULL; /* Since some callers don't initialize it */
1267 /* come back to here if we encounter a non-existent object in a read-only
1268 * volume's directory */
1271 *avcp = NULL; /* Since some callers don't initialize it */
1274 if (!(adp->f.states & CStatd) && !afs_InReadDir(adp)) {
1275 if ((code = afs_VerifyVCache2(adp, &treq))) {
1281 /* watch for ".." in a volume root */
1282 if (adp->mvstat == 2 && aname[0] == '.' && aname[1] == '.' && !aname[2]) {
1283 /* looking up ".." in root via special hacks */
1284 if (adp->mvid == (struct VenusFid *)0 || adp->mvid->Fid.Volume == 0) {
1288 /* otherwise we have the fid here, so we use it */
1289 /*printf("Getting vcache\n");*/
1290 tvc = afs_GetVCache(adp->mvid, &treq, NULL, NULL);
1291 afs_Trace3(afs_iclSetp, CM_TRACE_GETVCDOTDOT, ICL_TYPE_FID, adp->mvid,
1292 ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32, code);
1294 code = (tvc ? 0 : ENOENT);
1296 if (tvc && !VREFCOUNT_GT(tvc, 0)) {
1300 /*printf("LOOKUP GETVCDOTDOT -> %d\n", code); */
1305 /* now check the access */
1306 if (treq.uid != adp->last_looker) {
1307 if (!afs_AccessOK(adp, PRSFS_LOOKUP, &treq, CHECK_MODE_BITS)) {
1312 adp->last_looker = treq.uid;
1315 /* Check for read access as well. We need read access in order to
1316 * stat files, but not to stat subdirectories. */
1317 if (!afs_AccessOK(adp, PRSFS_READ, &treq, CHECK_MODE_BITS))
1320 /* special case lookup of ".". Can we check for it sooner in this code,
1321 * for instance, way up before "redo:" ??
1322 * I'm not fiddling with the LRUQ here, either, perhaps I should, or else
1323 * invent a lightweight version of GetVCache.
1325 if (aname[0] == '.' && !aname[1]) { /* special case */
1326 ObtainReadLock(&afs_xvcache);
1328 ReleaseReadLock(&afs_xvcache);
1329 #ifdef AFS_DARWIN80_ENV
1330 vnode_get(AFSTOV(adp));
1335 if (adp && !VREFCOUNT_GT(adp, 0)) {
1342 * Special case lookup of ".." in the dynamic mount directory.
1343 * The parent of this directory is _always_ the AFS root volume.
1345 if (afs_IsDynrootMount(adp) &&
1346 aname[0] == '.' && aname[1] == '.' && !aname[2]) {
1348 ObtainReadLock(&afs_xvcache);
1349 osi_vnhold(afs_globalVp, 0);
1350 ReleaseReadLock(&afs_xvcache);
1351 #ifdef AFS_DARWIN80_ENV
1352 vnode_get(AFSTOV(afs_globalVp));
1355 *avcp = tvc = afs_globalVp;
1361 * Special case lookups in the dynamic mount directory.
1362 * The names here take the form cell:volume, similar to a mount point.
1363 * EvalMountData parses that and returns a cell and volume ID, which
1364 * we use to construct the appropriate dynroot Fid.
1366 if (afs_IsDynrootMount(adp)) {
1367 struct VenusFid tfid;
1368 afs_uint32 cellidx, volid, vnoid;
1370 code = EvalMountData('%', aname, 0, 0, NULL, &treq, &cellidx, &volid, &vnoid);
1373 afs_GetDynrootMountFid(&tfid);
1374 tfid.Fid.Vnode = VNUM_FROM_TYPEID(VN_TYPE_MOUNT, cellidx << 2);
1375 tfid.Fid.Unique = volid;
1376 *avcp = tvc = afs_GetVCache(&tfid, &treq, NULL, NULL);
1381 #ifdef AFS_LINUX26_ENV
1383 * Special case of the dynamic mount volume in a static root.
1384 * This is really unfortunate, but we need this for the translator.
1386 if (adp == afs_globalVp && !afs_GetDynrootEnable() &&
1387 !strcmp(aname, AFS_DYNROOT_MOUNTNAME)) {
1388 struct VenusFid tfid;
1390 afs_GetDynrootMountFid(&tfid);
1391 *avcp = tvc = afs_GetVCache(&tfid, &treq, NULL, NULL);
1398 Check_AtSys(adp, aname, &sysState, &treq);
1399 tname = sysState.name;
1401 /* 1st Check_AtSys and lookup by tname is required here, for now,
1402 * because the dnlc is *not* told to remove entries for the parent
1403 * dir of file/dir op that afs_LocalHero likes, but dnlc is informed
1404 * if the cached entry for the parent dir is invalidated for a
1406 * Otherwise, we'd be able to do a dnlc lookup on an entry ending
1407 * w/@sys and know the dnlc was consistent with reality. */
1408 tvc = osi_dnlc_lookup(adp, tname, WRITE_LOCK);
1409 *avcp = tvc; /* maybe wasn't initialized, but it is now */
1411 if (no_read_access && vType(tvc) != VDIR && vType(tvc) != VLNK) {
1412 /* need read access on dir to stat non-directory / non-link */
1413 #ifndef AFS_FBSD80_ENV
1420 #ifdef AFS_LINUX22_ENV
1421 if (tvc->mvstat == 2) { /* we don't trust the dnlc for root vcaches */
1422 AFS_RELE(AFSTOV(tvc));
1429 #else /* non - LINUX */
1433 #endif /* linux22 */
1436 { /* sub-block just to reduce stack usage */
1437 register struct dcache *tdc;
1438 afs_size_t dirOffset, dirLen;
1439 struct VenusFid tfid;
1441 /* now we have to lookup the next fid */
1442 if (afs_InReadDir(adp))
1443 tdc = adp->dcreaddir;
1445 tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq,
1446 &dirOffset, &dirLen, 1);
1448 *avcp = NULL; /* redundant, but harmless */
1453 /* now we will just call dir package with appropriate inode.
1454 * Dirs are always fetched in their entirety for now */
1455 ObtainReadLock(&adp->lock);
1456 ObtainReadLock(&tdc->lock);
1459 * Make sure that the data in the cache is current. There are two
1460 * cases we need to worry about:
1461 * 1. The cache data is being fetched by another process.
1462 * 2. The cache data is no longer valid
1464 * If a readdir is in progress _in this thread_, it has a shared
1465 * lock on the vcache and has obtained current data, so we just
1466 * use that. This eliminates several possible deadlocks.
1468 if (!afs_InReadDir(adp)) {
1469 while ((adp->f.states & CStatd)
1470 && (tdc->dflags & DFFetching)
1471 && hsame(adp->f.m.DataVersion, tdc->f.versionNo)) {
1472 ReleaseReadLock(&tdc->lock);
1473 ReleaseReadLock(&adp->lock);
1474 afs_osi_Sleep(&tdc->validPos);
1475 ObtainReadLock(&adp->lock);
1476 ObtainReadLock(&tdc->lock);
1478 if (!(adp->f.states & CStatd)
1479 || !hsame(adp->f.m.DataVersion, tdc->f.versionNo)) {
1480 ReleaseReadLock(&tdc->lock);
1481 ReleaseReadLock(&adp->lock);
1483 if (tname && tname != aname)
1484 osi_FreeLargeSpace(tname);
1489 /* Save the version number for when we call osi_dnlc_enter */
1490 hset(versionNo, tdc->f.versionNo);
1493 * check for, and handle "@sys" if it's there. We should be able
1494 * to avoid the alloc and the strcpy with a little work, but it's
1495 * not pressing. If there aren't any remote users (ie, via the
1496 * NFS translator), we have a slightly easier job.
1497 * the faster way to do this is to check for *aname == '@' and if
1498 * it's there, check for @sys, otherwise, assume there's no @sys
1499 * then, if the lookup fails, check for .*@sys...
1501 /* above now implemented by Check_AtSys and Next_AtSys */
1503 /* lookup the name in the appropriate dir, and return a cache entry
1504 * on the resulting fid */
1506 afs_dir_LookupOffset(tdc, sysState.name, &tfid.Fid,
1509 /* If the first lookup doesn't succeed, maybe it's got @sys in the name */
1510 while (code == ENOENT && Next_AtSys(adp, &treq, &sysState))
1512 afs_dir_LookupOffset(tdc, sysState.name, &tfid.Fid,
1514 tname = sysState.name;
1516 ReleaseReadLock(&tdc->lock);
1517 if (!afs_InReadDir(adp))
1519 if (code == ENOENT && afs_IsDynroot(adp) && dynrootRetry && !tryEvalOnly) {
1520 ReleaseReadLock(&adp->lock);
1522 if (tname[0] == '.')
1523 afs_LookupAFSDB(tname + 1);
1525 afs_LookupAFSDB(tname);
1526 if (tname && tname != aname)
1527 osi_FreeLargeSpace(tname);
1530 ReleaseReadLock(&adp->lock);
1533 /* new fid has same cell and volume */
1534 tfid.Cell = adp->f.fid.Cell;
1535 tfid.Fid.Volume = adp->f.fid.Fid.Volume;
1536 afs_Trace4(afs_iclSetp, CM_TRACE_LOOKUP, ICL_TYPE_POINTER, adp,
1537 ICL_TYPE_STRING, tname, ICL_TYPE_FID, &tfid,
1538 ICL_TYPE_INT32, code);
1541 if (code != ENOENT) {
1542 /*printf("LOOKUP dirLookupOff -> %d\n", code);*/
1547 /* prefetch some entries, if the dir is currently open. The variable
1548 * dirCookie tells us where to start prefetching from.
1550 if (!AFS_IS_DISCONNECTED &&
1551 AFSDOBULK && adp->opens > 0 && !(adp->f.states & CForeign)
1552 && !afs_IsDynroot(adp) && !afs_InReadDir(adp)) {
1554 /* if the entry is not in the cache, or is in the cache,
1555 * but hasn't been statd, then do a bulk stat operation.
1559 ObtainReadLock(&afs_xvcache);
1560 tvc = afs_FindVCache(&tfid, &retry, 0 /* !stats,!lru */ );
1561 ReleaseReadLock(&afs_xvcache);
1562 } while (tvc && retry);
1564 if (!tvc || !(tvc->f.states & CStatd))
1565 bulkcode = afs_DoBulkStat(adp, dirCookie, &treq);
1569 /* if the vcache isn't usable, release it */
1570 if (tvc && !(tvc->f.states & CStatd)) {
1571 #ifndef AFS_FBSD80_ENV
1581 /* now get the status info, if we don't already have it */
1582 /* This is kind of weird, but we might wind up accidentally calling
1583 * RXAFS_Lookup because we happened upon a file which legitimately
1584 * has a 0 uniquifier. That is the result of allowing unique to wrap
1585 * to 0. This was fixed in AFS 3.4. For CForeign, Unique == 0 means that
1586 * the file has not yet been looked up.
1589 afs_int32 cached = 0;
1590 if (!tfid.Fid.Unique && (adp->f.states & CForeign)) {
1591 tvc = afs_LookupVCache(&tfid, &treq, &cached, adp, tname);
1593 if (!tvc && !bulkcode) { /* lookup failed or wasn't called */
1594 tvc = afs_GetVCache(&tfid, &treq, &cached, NULL);
1597 } /* sub-block just to reduce stack usage */
1600 if (adp->f.states & CForeign)
1601 tvc->f.states |= CForeign;
1602 tvc->f.parent.vnode = adp->f.fid.Fid.Vnode;
1603 tvc->f.parent.unique = adp->f.fid.Fid.Unique;
1604 tvc->f.states &= ~CBulkStat;
1606 if (afs_fakestat_enable == 2 && tvc->mvstat == 1) {
1607 ObtainSharedLock(&tvc->lock, 680);
1608 if (!tvc->linkData) {
1609 UpgradeSToWLock(&tvc->lock, 681);
1610 code = afs_HandleLink(tvc, &treq);
1611 ConvertWToRLock(&tvc->lock);
1613 ConvertSToRLock(&tvc->lock);
1616 if (!code && !afs_strchr(tvc->linkData, ':'))
1618 ReleaseReadLock(&tvc->lock);
1620 if (tvc->mvstat == 1 && (tvc->f.states & CMValid) && tvc->mvid != NULL)
1621 force_eval = 1; /* This is now almost for free, get it correct */
1623 #if defined(UKERNEL) && defined(AFS_WEB_ENHANCEMENTS)
1624 if (!(flags & AFS_LOOKUP_NOEVAL))
1625 /* don't eval mount points */
1626 #endif /* UKERNEL && AFS_WEB_ENHANCEMENTS */
1627 if (tvc->mvstat == 1 && force_eval) {
1628 /* a mt point, possibly unevaluated */
1629 struct volume *tvolp;
1631 ObtainWriteLock(&tvc->lock, 133);
1632 code = EvalMountPoint(tvc, adp, &tvolp, &treq);
1633 ReleaseWriteLock(&tvc->lock);
1636 #ifndef AFS_FBSD80_ENV
1640 afs_PutVolume(tvolp, WRITE_LOCK);
1644 /* next, we want to continue using the target of the mt point */
1645 if (tvc->mvid && (tvc->f.states & CMValid)) {
1647 /* now lookup target, to set .. pointer */
1648 afs_Trace2(afs_iclSetp, CM_TRACE_LOOKUP1,
1649 ICL_TYPE_POINTER, tvc, ICL_TYPE_FID,
1651 uvc = tvc; /* remember for later */
1653 if (tvolp && (tvolp->states & VForeign)) {
1654 /* XXXX tvolp has ref cnt on but not locked! XXX */
1656 afs_GetRootVCache(tvc->mvid, &treq, NULL, tvolp);
1658 tvc = afs_GetVCache(tvc->mvid, &treq, NULL, NULL);
1660 #ifndef AFS_FBSD80_ENV
1661 afs_PutVCache(uvc); /* we're done with it */
1667 afs_PutVolume(tvolp, WRITE_LOCK);
1672 /* now, if we came via a new mt pt (say because of a new
1673 * release of a R/O volume), we must reevaluate the ..
1674 * ptr to point back to the appropriate place */
1676 ObtainWriteLock(&tvc->lock, 134);
1677 if (tvc->mvid == NULL) {
1678 tvc->mvid = (struct VenusFid *)
1679 osi_AllocSmallSpace(sizeof(struct VenusFid));
1681 /* setup backpointer */
1682 *tvc->mvid = tvolp->dotdot;
1683 ReleaseWriteLock(&tvc->lock);
1684 afs_PutVolume(tvolp, WRITE_LOCK);
1687 #ifndef AFS_FBSD80_ENV
1692 afs_PutVolume(tvolp, WRITE_LOCK);
1697 if (tvc && !VREFCOUNT_GT(tvc, 0)) {
1702 /* if we get here, we found something in a directory that couldn't
1703 * be located (a Multics "connection failure"). If the volume is
1704 * read-only, we try flushing this entry from the cache and trying
1706 if (!AFS_IS_DISCONNECTED) {
1709 tv = afs_GetVolume(&adp->f.fid, &treq, READ_LOCK);
1711 if (tv->states & VRO) {
1712 pass = 1; /* try this *once* */
1713 ObtainWriteLock(&afs_xcbhash, 495);
1714 afs_DequeueCallback(adp);
1715 /* re-stat to get later version */
1716 adp->f.states &= ~CStatd;
1717 ReleaseWriteLock(&afs_xcbhash);
1718 osi_dnlc_purgedp(adp);
1719 afs_PutVolume(tv, READ_LOCK);
1722 afs_PutVolume(tv, READ_LOCK);
1732 /* put the network buffer back, if need be */
1733 if (tname != aname && tname)
1734 osi_FreeLargeSpace(tname);
1738 afs_AddMarinerName(aname, tvc);
1740 #if defined(UKERNEL) && defined(AFS_WEB_ENHANCEMENTS)
1741 if (!(flags & AFS_LOOKUP_NOEVAL)) {
1742 /* Here we don't enter the name into the DNLC because we want the
1743 * evaluated mount dir to be there (the vcache for the mounted
1744 * volume) rather than the vc of the mount point itself. We can
1745 * still find the mount point's vc in the vcache by its fid. */
1746 #endif /* UKERNEL && AFS_WEB_ENHANCEMENTS */
1747 if (!hit && force_eval) {
1748 osi_dnlc_enter(adp, aname, tvc, &versionNo);
1750 #ifdef AFS_LINUX20_ENV
1751 /* So Linux inode cache is up to date. */
1752 code = afs_VerifyVCache(tvc, &treq);
1754 afs_PutFakeStat(&fakestate);
1755 AFS_DISCON_UNLOCK();
1756 return 0; /* can't have been any errors if hit and !code */
1759 #if defined(UKERNEL) && defined(AFS_WEB_ENHANCEMENTS)
1766 code = afs_CheckCode(code, &treq, 19);
1768 /* If there is an error, make sure *avcp is null.
1769 * Alphas panic otherwise - defect 10719.
1774 afs_PutFakeStat(&fakestate);
1775 AFS_DISCON_UNLOCK();