2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afs/param.h>
30 extern void afsi_log(char *pattern, ...);
33 int cm_enableServerLocks = 1;
35 int cm_followBackupPath = 0;
38 * Case-folding array. This was constructed by inspecting of SMBtrace output.
39 * I do not know anything more about it.
41 unsigned char cm_foldUpper[256] = {
42 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
43 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
44 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
45 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
46 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
47 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
48 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
49 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
50 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
51 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
52 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
53 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
54 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
55 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
56 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
57 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
58 0x80, 0x9a, 0x90, 0x41, 0x8e, 0x41, 0x8f, 0x80,
59 0x45, 0x45, 0x45, 0x49, 0x49, 0x49, 0x8e, 0x8f,
60 0x90, 0x92, 0x92, 0x4f, 0x99, 0x4f, 0x55, 0x55,
61 0x59, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
62 0x41, 0x49, 0x4f, 0x55, 0xa5, 0xa5, 0x56, 0xa7,
63 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
64 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
65 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
66 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
67 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
68 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
69 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
70 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
71 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
72 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
73 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
77 * Case-insensitive string comparison. We used to use stricmp, but it doesn't
78 * know about 8-bit characters (e.g. 129 is lowercase u-umlaut, 154 is
79 * upper-case u-umlaut).
81 int cm_stricmp(const char *str1, const char *str2)
93 c1 = (char) cm_foldUpper[(unsigned char)(*str1++)];
94 c2 = (char) cm_foldUpper[(unsigned char)(*str2++)];
104 /* return success if we can open this file in this mode */
105 long cm_CheckOpen(cm_scache_t *scp, int openMode, int trunc, cm_user_t *userp,
113 rights |= PRSFS_READ;
114 if (openMode == 1 || openMode == 2 || trunc)
115 rights |= PRSFS_WRITE;
117 lock_ObtainWrite(&scp->rw);
119 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
120 CM_SCACHESYNC_GETSTATUS
121 | CM_SCACHESYNC_NEEDCALLBACK
122 | CM_SCACHESYNC_LOCK);
125 ((rights & PRSFS_WRITE) || (rights & PRSFS_READ)) &&
126 scp->fileType == CM_SCACHETYPE_FILE) {
129 unsigned int sLockType;
130 LARGE_INTEGER LOffset, LLength;
132 /* Check if there's some sort of lock on the file at the
135 key = cm_GenerateKey(CM_SESSION_CMINT,0,0);
137 if (rights & PRSFS_WRITE)
140 sLockType = LOCKING_ANDX_SHARED_LOCK;
142 LOffset.HighPart = CM_FLSHARE_OFFSET_HIGH;
143 LOffset.LowPart = CM_FLSHARE_OFFSET_LOW;
144 LLength.HighPart = CM_FLSHARE_LENGTH_HIGH;
145 LLength.LowPart = CM_FLSHARE_LENGTH_LOW;
147 code = cm_Lock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp, NULL);
150 cm_Unlock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp);
152 /* In this case, we allow the file open to go through even
153 though we can't enforce mandatory locking on the
155 if (code == CM_ERROR_NOACCESS &&
156 !(rights & PRSFS_WRITE))
160 case CM_ERROR_ALLOFFLINE:
161 case CM_ERROR_ALLDOWN:
162 case CM_ERROR_ALLBUSY:
163 case CM_ERROR_TIMEDOUT:
165 case CM_ERROR_WOULDBLOCK:
168 code = CM_ERROR_SHARING_VIOLATION;
173 } else if (code != 0) {
177 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
181 lock_ReleaseWrite(&scp->rw);
186 /* return success if we can open this file in this mode */
187 long cm_CheckNTOpen(cm_scache_t *scp, unsigned int desiredAccess,
188 unsigned int createDisp, cm_user_t *userp, cm_req_t *reqp,
189 cm_lock_data_t **ldpp)
194 osi_assertx(ldpp != NULL, "null cm_lock_data_t");
197 /* Always allow delete; the RPC will tell us if it's OK */
198 if (desiredAccess == DELETE)
203 if (desiredAccess & (AFS_ACCESS_READ|AFS_ACCESS_EXECUTE))
204 rights |= (scp->fileType == CM_SCACHETYPE_DIRECTORY ? PRSFS_LOOKUP : PRSFS_READ);
206 /* We used to require PRSFS_WRITE if createDisp was 4
207 (OPEN_ALWAYS) even if AFS_ACCESS_WRITE was not requested.
208 However, we don't need to do that since the existence of the
209 scp implies that we don't need to create it. */
210 if (desiredAccess & AFS_ACCESS_WRITE)
211 rights |= PRSFS_WRITE;
213 lock_ObtainWrite(&scp->rw);
215 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
216 CM_SCACHESYNC_GETSTATUS
217 | CM_SCACHESYNC_NEEDCALLBACK
218 | CM_SCACHESYNC_LOCK);
221 * If the open will fail because the volume is readonly, then we will
222 * return an access denied error instead. This is to help brain-dead
223 * apps run correctly on replicated volumes.
224 * See defect 10007 for more information.
226 if (code == CM_ERROR_READONLY)
227 code = CM_ERROR_NOACCESS;
230 ((rights & PRSFS_WRITE) || (rights & PRSFS_READ)) &&
231 scp->fileType == CM_SCACHETYPE_FILE) {
233 unsigned int sLockType;
234 LARGE_INTEGER LOffset, LLength;
236 /* Check if there's some sort of lock on the file at the
239 key = cm_GenerateKey(CM_SESSION_CMINT,0,0);
240 if (rights & PRSFS_WRITE)
243 sLockType = LOCKING_ANDX_SHARED_LOCK;
245 /* single byte lock at offset 0x0100 0000 0000 0000 */
246 LOffset.HighPart = CM_FLSHARE_OFFSET_HIGH;
247 LOffset.LowPart = CM_FLSHARE_OFFSET_LOW;
248 LLength.HighPart = CM_FLSHARE_LENGTH_HIGH;
249 LLength.LowPart = CM_FLSHARE_LENGTH_LOW;
251 code = cm_Lock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp, NULL);
254 (*ldpp) = (cm_lock_data_t *)malloc(sizeof(cm_lock_data_t));
261 (*ldpp)->sLockType = sLockType;
262 (*ldpp)->LOffset.HighPart = LOffset.HighPart;
263 (*ldpp)->LOffset.LowPart = LOffset.LowPart;
264 (*ldpp)->LLength.HighPart = LLength.HighPart;
265 (*ldpp)->LLength.LowPart = LLength.LowPart;
267 /* In this case, we allow the file open to go through even
268 though we can't enforce mandatory locking on the
270 if (code == CM_ERROR_NOACCESS &&
271 !(rights & PRSFS_WRITE))
275 case CM_ERROR_ALLOFFLINE:
276 case CM_ERROR_ALLDOWN:
277 case CM_ERROR_ALLBUSY:
278 case CM_ERROR_TIMEDOUT:
280 case CM_ERROR_WOULDBLOCK:
283 code = CM_ERROR_SHARING_VIOLATION;
287 } else if (code != 0) {
292 lock_ReleaseWrite(&scp->rw);
294 osi_Log3(afsd_logp,"cm_CheckNTOpen scp 0x%p ldp 0x%p code 0x%x", scp, *ldpp, code);
298 extern long cm_CheckNTOpenDone(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp,
299 cm_lock_data_t ** ldpp)
301 osi_Log2(afsd_logp,"cm_CheckNTOpenDone scp 0x%p ldp 0x%p", scp, *ldpp);
302 lock_ObtainWrite(&scp->rw);
304 cm_Unlock(scp, (*ldpp)->sLockType, (*ldpp)->LOffset, (*ldpp)->LLength,
305 (*ldpp)->key, 0, userp, reqp);
309 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
310 lock_ReleaseWrite(&scp->rw);
314 * When CAP_NT_SMBS has been negotiated, deletion (of files or directories) is
315 * done in three steps:
316 * (1) open for deletion (NT_CREATE_AND_X)
317 * (2) set for deletion on close (NT_TRANSACTION2, SET_FILE_INFO)
319 * We must not do the RPC until step 3. But if we are going to return an error
320 * code (e.g. directory not empty), we must return it by step 2, otherwise most
321 * clients will not notice it. So we do a preliminary check. For deleting
322 * files, this is almost free, since we have already done the RPC to get the
323 * parent directory's status bits. But for deleting directories, we must do an
324 * additional RPC to get the directory's data to check if it is empty. Sigh.
326 long cm_CheckNTDelete(cm_scache_t *dscp, cm_scache_t *scp, cm_user_t *userp,
332 cm_dirEntry_t *dep = 0;
333 unsigned short *hashTable;
335 int BeyondPage = 0, HaveDot = 0, HaveDotDot = 0;
338 /* First check permissions */
339 lock_ObtainWrite(&scp->rw);
340 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_DELETE,
341 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
343 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
344 lock_ReleaseWrite(&scp->rw);
348 /* If deleting directory, must be empty */
350 if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
353 thyper.HighPart = 0; thyper.LowPart = 0;
354 code = buf_Get(scp, &thyper, reqp, &bufferp);
358 lock_ObtainMutex(&bufferp->mx);
359 lock_ObtainWrite(&scp->rw);
362 code = cm_SyncOp(scp, bufferp, userp, reqp, 0,
363 CM_SCACHESYNC_NEEDCALLBACK
365 | CM_SCACHESYNC_BUFLOCKED);
369 if (cm_HaveBuffer(scp, bufferp, 1))
372 /* otherwise, load the buffer and try again */
373 lock_ReleaseMutex(&bufferp->mx);
374 code = cm_GetBuffer(scp, bufferp, NULL, userp, reqp);
375 lock_ReleaseWrite(&scp->rw);
376 lock_ObtainMutex(&bufferp->mx);
377 lock_ObtainWrite(&scp->rw);
378 cm_SyncOpDone(scp, bufferp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ | CM_SCACHESYNC_BUFLOCKED);
383 lock_ReleaseWrite(&scp->rw);
386 /* We try to determine emptiness without looking beyond the first page,
387 * and without assuming "." and ".." are present and are on the first
388 * page (though these assumptions might, after all, be reasonable).
390 hashTable = (unsigned short *)(bufferp->datap + (32 * 5));
391 for (i=0; i<128; i++) {
392 idx = ntohs(hashTable[i]);
398 dep = (cm_dirEntry_t *)(bufferp->datap + (32 * idx));
399 if (strcmp(dep->name, ".") == 0)
401 else if (strcmp(dep->name, "..") == 0)
404 code = CM_ERROR_NOTEMPTY;
407 idx = ntohs(dep->next);
410 if (BeyondPage && HaveDot && HaveDotDot)
411 code = CM_ERROR_NOTEMPTY;
415 lock_ReleaseMutex(&bufferp->mx);
416 buf_Release(bufferp);
418 lock_ReleaseWrite(&scp->rw);
423 * Iterate through all entries in a directory.
424 * When the function funcp is called, the buffer is locked but the
425 * directory vnode is not.
427 * If the retscp parameter is not NULL, the parmp must be a
428 * cm_lookupSearch_t object.
430 long cm_ApplyDir(cm_scache_t *scp, cm_DirFuncp_t funcp, void *parmp,
431 osi_hyper_t *startOffsetp, cm_user_t *userp, cm_req_t *reqp,
432 cm_scache_t **retscp)
436 cm_dirEntry_t *dep = 0;
439 osi_hyper_t dirLength;
440 osi_hyper_t bufferOffset;
441 osi_hyper_t curOffset;
445 cm_pageHeader_t *pageHeaderp;
447 long nextEntryCookie;
448 int numDirChunks; /* # of 32 byte dir chunks in this entry */
450 /* get the directory size */
451 lock_ObtainWrite(&scp->rw);
452 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_LOOKUP,
453 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
454 lock_ReleaseWrite(&scp->rw);
458 if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
459 return CM_ERROR_NOTDIR;
461 if (retscp) /* if this is a lookup call */
463 cm_lookupSearch_t* sp = parmp;
466 #ifdef AFS_FREELANCE_CLIENT
467 /* Freelance entries never end up in the DNLC because they
468 * do not have an associated cm_server_t
470 !(cm_freelanceEnabled &&
471 sp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
472 sp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
473 #else /* !AFS_FREELANCE_CLIENT */
478 int casefold = sp->caseFold;
479 sp->caseFold = 0; /* we have a strong preference for exact matches */
480 if ( *retscp = cm_dnlcLookup(scp, sp)) /* dnlc hit */
482 sp->caseFold = casefold;
485 sp->caseFold = casefold;
487 /* see if we can find it using the directory hash tables.
488 we can only do exact matches, since the hash is case
498 code = cm_BeginDirOp(scp, userp, reqp, CM_DIRLOCK_READ, &dirop);
502 code = cm_BPlusDirLookup(&dirop, sp->nsearchNamep, &sp->fid);
507 code = cm_DirLookup(&dirop, sp->searchNamep, &sp->fid);
515 sp->ExactFound = TRUE;
516 *retscp = NULL; /* force caller to call cm_GetSCache() */
521 if (sp->caseFold && code == CM_ERROR_INEXACT_MATCH) {
524 sp->ExactFound = FALSE;
525 *retscp = NULL; /* force caller to call cm_GetSCache() */
529 return CM_ERROR_BPLUS_NOMATCH;
537 * XXX We only get the length once. It might change when we drop the
540 dirLength = scp->length;
543 bufferOffset.LowPart = bufferOffset.HighPart = 0;
545 curOffset = *startOffsetp;
547 curOffset.HighPart = 0;
548 curOffset.LowPart = 0;
552 /* make sure that curOffset.LowPart doesn't point to the first
553 * 32 bytes in the 2nd through last dir page, and that it
554 * doesn't point at the first 13 32-byte chunks in the first
555 * dir page, since those are dir and page headers, and don't
556 * contain useful information.
558 temp = curOffset.LowPart & (2048-1);
559 if (curOffset.HighPart == 0 && curOffset.LowPart < 2048) {
560 /* we're in the first page */
561 if (temp < 13*32) temp = 13*32;
564 /* we're in a later dir page */
565 if (temp < 32) temp = 32;
568 /* make sure the low order 5 bits are zero */
571 /* now put temp bits back ito curOffset.LowPart */
572 curOffset.LowPart &= ~(2048-1);
573 curOffset.LowPart |= temp;
575 /* check if we've passed the dir's EOF */
576 if (LargeIntegerGreaterThanOrEqualTo(curOffset, dirLength))
579 /* see if we can use the bufferp we have now; compute in which
580 * page the current offset would be, and check whether that's
581 * the offset of the buffer we have. If not, get the buffer.
583 thyper.HighPart = curOffset.HighPart;
584 thyper.LowPart = curOffset.LowPart & ~(cm_data.buf_blockSize-1);
585 if (!bufferp || !LargeIntegerEqualTo(thyper, bufferOffset)) {
588 lock_ReleaseMutex(&bufferp->mx);
589 buf_Release(bufferp);
593 code = buf_Get(scp, &thyper, reqp, &bufferp);
595 /* if buf_Get() fails we do not have a buffer object to lock */
600 lock_ObtainMutex(&bufferp->mx);
601 bufferOffset = thyper;
603 /* now get the data in the cache */
605 lock_ObtainWrite(&scp->rw);
606 code = cm_SyncOp(scp, bufferp, userp, reqp,
608 CM_SCACHESYNC_NEEDCALLBACK
610 | CM_SCACHESYNC_BUFLOCKED);
612 lock_ReleaseWrite(&scp->rw);
615 cm_SyncOpDone(scp, bufferp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ | CM_SCACHESYNC_BUFLOCKED);
617 if (cm_HaveBuffer(scp, bufferp, 1)) {
618 lock_ReleaseWrite(&scp->rw);
622 /* otherwise, load the buffer and try again */
623 lock_ReleaseMutex(&bufferp->mx);
624 code = cm_GetBuffer(scp, bufferp, NULL, userp,
626 lock_ReleaseWrite(&scp->rw);
627 lock_ObtainMutex(&bufferp->mx);
632 lock_ReleaseMutex(&bufferp->mx);
633 buf_Release(bufferp);
637 } /* if (wrong buffer) ... */
639 /* now we have the buffer containing the entry we're interested
640 * in; copy it out if it represents a non-deleted entry.
642 entryInDir = curOffset.LowPart & (2048-1);
643 entryInBuffer = curOffset.LowPart & (cm_data.buf_blockSize - 1);
645 /* page header will help tell us which entries are free. Page
646 * header can change more often than once per buffer, since
647 * AFS 3 dir page size may be less than (but not more than) a
648 * buffer package buffer.
650 /* only look intra-buffer */
651 temp = curOffset.LowPart & (cm_data.buf_blockSize - 1);
652 temp &= ~(2048 - 1); /* turn off intra-page bits */
653 pageHeaderp = (cm_pageHeader_t *) (bufferp->datap + temp);
655 /* now determine which entry we're looking at in the page. If
656 * it is free (there's a free bitmap at the start of the dir),
657 * we should skip these 32 bytes.
659 slotInPage = (entryInDir & 0x7e0) >> 5;
660 if (!(pageHeaderp->freeBitmap[slotInPage>>3]
661 & (1 << (slotInPage & 0x7)))) {
662 /* this entry is free */
663 numDirChunks = 1; /* only skip this guy */
667 tp = bufferp->datap + entryInBuffer;
668 dep = (cm_dirEntry_t *) tp; /* now points to AFS3 dir entry */
670 /* while we're here, compute the next entry's location, too,
671 * since we'll need it when writing out the cookie into the
672 * dir listing stream.
674 numDirChunks = cm_NameEntries(dep->name, NULL);
676 /* compute the offset of the cookie representing the next entry */
677 nextEntryCookie = curOffset.LowPart
678 + (CM_DIR_CHUNKSIZE * numDirChunks);
680 if (dep->fid.vnode != 0) {
681 /* this is one of the entries to use: it is not deleted */
682 code = (*funcp)(scp, dep, parmp, &curOffset);
685 } /* if we're including this name */
688 /* and adjust curOffset to be where the new cookie is */
690 thyper.LowPart = CM_DIR_CHUNKSIZE * numDirChunks;
691 curOffset = LargeIntegerAdd(thyper, curOffset);
692 } /* while copying data for dir listing */
694 /* release the mutex */
696 lock_ReleaseMutex(&bufferp->mx);
697 buf_Release(bufferp);
702 int cm_NoneUpper(normchar_t *s)
706 if (c >= 'A' && c <= 'Z')
711 int cm_NoneLower(normchar_t *s)
715 if (c >= 'a' && c <= 'z')
720 long cm_LookupSearchProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
723 cm_lookupSearch_t *sp;
725 normchar_t matchName[MAX_PATH];
726 int looking_for_short_name = FALSE;
728 sp = (cm_lookupSearch_t *) rockp;
730 if (cm_FsStringToNormString(dep->name, -1, matchName, lengthof(matchName)) == 0) {
731 /* Can't normalize FS string. */
736 match = cm_NormStrCmpI(matchName, sp->nsearchNamep);
738 match = cm_NormStrCmp(matchName, sp->nsearchNamep);
742 && !cm_Is8Dot3(matchName)) {
744 cm_Gen8Dot3NameInt(dep->name, &dep->fid, matchName, NULL);
746 match = cm_NormStrCmpI(matchName, sp->nsearchNamep);
748 match = cm_NormStrCmp(matchName, sp->nsearchNamep);
749 looking_for_short_name = TRUE;
759 if (!sp->caseFold || looking_for_short_name) {
760 cm_SetFid(&sp->fid, sp->fid.cell, sp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
761 return CM_ERROR_STOPNOW;
765 * If we get here, we are doing a case-insensitive search, and we
766 * have found a match. Now we determine what kind of match it is:
767 * exact, lower-case, upper-case, or none of the above. This is done
768 * in order to choose among matches, if there are more than one.
771 /* Exact matches are the best. */
772 match = cm_NormStrCmp(matchName, sp->nsearchNamep);
775 cm_SetFid(&sp->fid, sp->fid.cell, sp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
776 return CM_ERROR_STOPNOW;
779 /* Lower-case matches are next. */
782 if (cm_NoneUpper(matchName)) {
787 /* Upper-case matches are next. */
790 if (cm_NoneLower(matchName)) {
795 /* General matches are last. */
801 cm_SetFid(&sp->fid, sp->fid.cell, sp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
805 /* read the contents of a mount point into the appropriate string.
806 * called with write locked scp, and returns with locked scp.
808 long cm_ReadMountPoint(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp)
811 cm_buf_t *bufp = NULL;
815 if (scp->mountPointStringp[0])
818 #ifdef AFS_FREELANCE_CLIENT
819 /* File servers do not have data for freelance entries */
820 if (cm_freelanceEnabled &&
821 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
822 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
824 code = cm_FreelanceFetchMountPointString(scp);
826 #endif /* AFS_FREELANCE_CLIENT */
828 /* otherwise, we have to read it in */
829 lock_ReleaseWrite(&scp->rw);
831 thyper.LowPart = thyper.HighPart = 0;
832 code = buf_Get(scp, &thyper, reqp, &bufp);
834 lock_ObtainWrite(&scp->rw);
839 code = cm_SyncOp(scp, bufp, userp, reqp, 0,
840 CM_SCACHESYNC_READ | CM_SCACHESYNC_NEEDCALLBACK);
844 cm_SyncOpDone(scp, bufp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ);
846 if (cm_HaveBuffer(scp, bufp, 0))
849 /* otherwise load buffer */
850 code = cm_GetBuffer(scp, bufp, NULL, userp, reqp);
854 /* locked, has callback, has valid data in buffer */
855 if ((tlen = scp->length.LowPart) > MOUNTPOINTLEN - 1)
856 return CM_ERROR_TOOBIG;
858 code = CM_ERROR_INVAL;
862 /* someone else did the work while we were out */
863 if (scp->mountPointStringp[0]) {
868 /* otherwise, copy out the link */
869 memcpy(scp->mountPointStringp, bufp->datap, tlen);
871 /* now make it null-terminated. Note that the original contents of a
872 * link that is a mount point is "#volname." where "." is there just to
873 * be turned into a null. That is, we can trash the last char of the
874 * link without damaging the vol name. This is a stupid convention,
875 * but that's the protocol.
877 scp->mountPointStringp[tlen-1] = 0;
888 /* called with a locked scp and chases the mount point, yielding outScpp.
889 * scp remains write locked, just for simplicity of describing the interface.
891 long cm_FollowMountPoint(cm_scache_t *scp, cm_scache_t *dscp, cm_user_t *userp,
892 cm_req_t *reqp, cm_scache_t **outScpp)
894 fschar_t *cellNamep = NULL;
895 fschar_t *volNamep = NULL;
900 cm_volume_t *volp = NULL;
909 if (scp->mountRootFid.cell != 0 && scp->mountRootGen >= cm_data.mountRootGen) {
910 tfid = scp->mountRootFid;
911 lock_ReleaseWrite(&scp->rw);
912 code = cm_GetSCache(&tfid, outScpp, userp, reqp);
913 lock_ObtainWrite(&scp->rw);
917 /* parse the volume name */
918 mpNamep = scp->mountPointStringp;
920 return CM_ERROR_NOSUCHPATH;
921 tlen = cm_FsStrLen(scp->mountPointStringp);
922 mtType = *scp->mountPointStringp;
924 cp = cm_FsStrChr(mpNamep, _FS(':'));
926 /* cellular mount point */
927 cellNamep = (fschar_t *)malloc((cp - mpNamep) * sizeof(fschar_t));
928 cm_FsStrCpyN(cellNamep, cp - mpNamep, mpNamep + 1, cp - mpNamep - 1);
929 volNamep = cm_FsStrDup(cp+1);
931 /* now look up the cell */
932 lock_ReleaseWrite(&scp->rw);
933 cellp = cm_GetCell(cellNamep, CM_FLAG_CREATE);
934 lock_ObtainWrite(&scp->rw);
937 volNamep = cm_FsStrDup(mpNamep + 1);
939 #ifdef AFS_FREELANCE_CLIENT
941 * Mount points in the Freelance cell should default
942 * to the workstation cell.
944 if (cm_freelanceEnabled &&
945 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
946 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
948 fschar_t rootCellName[256]="";
949 cm_GetRootCellName(rootCellName);
950 cellp = cm_GetCell(rootCellName, 0);
952 #endif /* AFS_FREELANCE_CLIENT */
953 cellp = cm_FindCellByID(scp->fid.cell, 0);
957 code = CM_ERROR_NOSUCHCELL;
961 vnLength = cm_FsStrLen(volNamep);
962 if (vnLength >= 8 && cm_FsStrCmp(volNamep + vnLength - 7, ".backup") == 0)
963 targetType = BACKVOL;
964 else if (vnLength >= 10
965 && cm_FsStrCmp(volNamep + vnLength - 9, ".readonly") == 0)
970 /* check for backups within backups */
971 if (targetType == BACKVOL
972 && (scp->flags & (CM_SCACHEFLAG_RO | CM_SCACHEFLAG_PURERO))
973 == CM_SCACHEFLAG_RO) {
974 code = CM_ERROR_NOSUCHVOLUME;
978 /* now we need to get the volume */
979 lock_ReleaseWrite(&scp->rw);
980 if (cm_VolNameIsID(volNamep)) {
981 code = cm_FindVolumeByID(cellp, atoi(volNamep), userp, reqp,
982 CM_GETVOL_FLAG_CREATE, &volp);
984 code = cm_FindVolumeByName(cellp, volNamep, userp, reqp,
985 CM_GETVOL_FLAG_CREATE, &volp);
987 lock_ObtainWrite(&scp->rw);
990 afs_uint32 cell, volume;
991 cm_vol_state_t *statep;
993 cell = cellp->cellID;
995 /* if the mt pt originates in a .backup volume (not a .readonly)
996 * and FollowBackupPath is active, and if there is a .backup
997 * volume for the target, then use the .backup of the target
998 * instead of the read-write.
1000 if (cm_followBackupPath &&
1001 volp->vol[BACKVOL].ID != 0 &&
1002 (dscp->flags & (CM_SCACHEFLAG_RO|CM_SCACHEFLAG_PURERO)) == CM_SCACHEFLAG_RO &&
1003 (targetType == RWVOL || targetType == ROVOL && volp->vol[ROVOL].ID == 0)
1005 targetType = BACKVOL;
1007 /* if the mt pt is in a read-only volume (not just a
1008 * backup), and if there is a read-only volume for the
1009 * target, and if this is a targetType '#' mount point, use
1010 * the read-only, otherwise use the one specified.
1012 else if (mtType == '#' && targetType == RWVOL &&
1013 (scp->flags & CM_SCACHEFLAG_PURERO) &&
1014 volp->vol[ROVOL].ID != 0) {
1018 lock_ObtainWrite(&volp->rw);
1019 statep = cm_VolumeStateByType(volp, targetType);
1020 volume = statep->ID;
1021 statep->dotdotFid = dscp->fid;
1022 lock_ReleaseWrite(&volp->rw);
1024 /* the rest of the fid is a magic number */
1025 cm_SetFid(&scp->mountRootFid, cell, volume, 1, 1);
1026 scp->mountRootGen = cm_data.mountRootGen;
1028 tfid = scp->mountRootFid;
1029 lock_ReleaseWrite(&scp->rw);
1030 code = cm_GetSCache(&tfid, outScpp, userp, reqp);
1031 lock_ObtainWrite(&scp->rw);
1044 long cm_LookupInternal(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_user_t *userp,
1045 cm_req_t *reqp, cm_scache_t **outScpp)
1048 int dnlcHit = 1; /* did we hit in the dnlc? yes, we did */
1049 cm_scache_t *tscp = NULL;
1050 cm_scache_t *mountedScp;
1051 cm_lookupSearch_t rock;
1053 normchar_t *nnamep = NULL;
1054 fschar_t *fnamep = NULL;
1058 memset(&rock, 0, sizeof(rock));
1060 if (dscp->fid.vnode == 1 && dscp->fid.unique == 1
1061 && cm_ClientStrCmp(cnamep, _C("..")) == 0) {
1062 if (dscp->dotdotFid.volume == 0)
1063 return CM_ERROR_NOSUCHVOLUME;
1064 rock.fid = dscp->dotdotFid;
1066 } else if (cm_ClientStrCmp(cnamep, _C(".")) == 0) {
1067 rock.fid = dscp->fid;
1071 nnamep = cm_ClientStringToNormStringAlloc(cnamep, -1, NULL);
1073 code = CM_ERROR_NOSUCHFILE;
1076 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
1078 code = CM_ERROR_NOSUCHFILE;
1082 if (flags & CM_FLAG_NOMOUNTCHASE) {
1083 /* In this case, we should go and call cm_Dir* functions
1084 directly since the following cm_ApplyDir() function will
1092 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ, &dirop);
1095 code = cm_BPlusDirLookup(&dirop, nnamep, &rock.fid);
1100 code = cm_DirLookup(&dirop, fnamep, &rock.fid);
1102 cm_EndDirOp(&dirop);
1112 if (code == CM_ERROR_INEXACT_MATCH && (flags & CM_FLAG_CASEFOLD)) {
1119 return CM_ERROR_BPLUS_NOMATCH;
1124 rock.fid.cell = dscp->fid.cell;
1125 rock.fid.volume = dscp->fid.volume;
1126 rock.searchNamep = fnamep;
1127 rock.nsearchNamep = nnamep;
1128 rock.caseFold = (flags & CM_FLAG_CASEFOLD);
1129 rock.hasTilde = ((cm_ClientStrChr(cnamep, '~') != NULL) ? 1 : 0);
1131 /* If NOMOUNTCHASE, bypass DNLC by passing NULL scp pointer */
1132 code = cm_ApplyDir(dscp, cm_LookupSearchProc, &rock, NULL, userp, reqp,
1133 (flags & CM_FLAG_NOMOUNTCHASE) ? NULL : &tscp);
1135 /* code == 0 means we fell off the end of the dir, while stopnow means
1136 * that we stopped early, probably because we found the entry we're
1137 * looking for. Any other non-zero code is an error.
1139 if (code && code != CM_ERROR_STOPNOW) {
1140 /* if the cm_scache_t we are searching in is not a directory
1141 * we must return path not found because the error
1142 * is to describe the final component not an intermediary
1144 if (code == CM_ERROR_NOTDIR) {
1145 if (flags & CM_FLAG_CHECKPATH)
1146 code = CM_ERROR_NOSUCHPATH;
1148 code = CM_ERROR_NOSUCHFILE;
1153 getroot = (dscp==cm_data.rootSCachep) ;
1155 if (!cm_freelanceEnabled || !getroot) {
1156 if (flags & CM_FLAG_CHECKPATH)
1157 code = CM_ERROR_NOSUCHPATH;
1159 code = CM_ERROR_NOSUCHFILE;
1162 else if (!cm_ClientStrChr(cnamep, '#') &&
1163 !cm_ClientStrChr(cnamep, '%') &&
1164 cm_ClientStrCmpI(cnamep, _C("srvsvc")) &&
1165 cm_ClientStrCmpI(cnamep, _C("wkssvc")) &&
1166 cm_ClientStrCmpI(cnamep, _C("ipc$")))
1168 /* nonexistent dir on freelance root, so add it */
1169 fschar_t fullname[CELL_MAXNAMELEN + 1] = "."; /* +1 so that when we skip the . the size is still CELL_MAXNAMELEN */
1172 osi_Log1(afsd_logp,"cm_Lookup adding mount for non-existent directory: %S",
1173 osi_LogSaveClientString(afsd_logp,cnamep));
1176 * There is an ugly behavior where a share name "foo" will be searched
1177 * for as "fo". If the searched for name differs by an already existing
1178 * symlink or mount point in the Freelance directory, do not add the
1179 * new value automatically.
1183 if (cnamep[0] == '.') {
1184 if (cm_GetCell_Gen(&fnamep[1], &fullname[1], CM_FLAG_CREATE)) {
1186 if (!cm_FreelanceMountPointExists(fullname, 0))
1187 code = cm_FreelanceAddMount(fullname, &fullname[1], "root.cell.",
1189 if ( cm_FsStrCmpI(&fnamep[1], &fullname[1]) &&
1190 !cm_FreelanceMountPointExists(fnamep, flags & CM_FLAG_DFS_REFERRAL ? 1 : 0) &&
1191 !cm_FreelanceSymlinkExists(fnamep, flags & CM_FLAG_DFS_REFERRAL ? 1 : 0))
1192 code = cm_FreelanceAddSymlink(fnamep, fullname, &rock.fid);
1195 if (cm_GetCell_Gen(fnamep, fullname, CM_FLAG_CREATE)) {
1197 if (!cm_FreelanceMountPointExists(fullname, 0))
1198 code = cm_FreelanceAddMount(fullname, fullname, "root.cell.", 0, &rock.fid);
1199 if ( cm_FsStrCmpI(fnamep, fullname) &&
1200 !cm_FreelanceMountPointExists(fnamep, flags & CM_FLAG_DFS_REFERRAL ? 1 : 0) &&
1201 !cm_FreelanceSymlinkExists(fnamep, flags & CM_FLAG_DFS_REFERRAL ? 1 : 0))
1202 code = cm_FreelanceAddSymlink(fnamep, fullname, &rock.fid);
1205 if (!found || code) { /* add mount point failed, so give up */
1206 if (flags & CM_FLAG_CHECKPATH)
1207 code = CM_ERROR_NOSUCHPATH;
1209 code = CM_ERROR_NOSUCHFILE;
1212 tscp = NULL; /* to force call of cm_GetSCache */
1214 if (flags & CM_FLAG_CHECKPATH)
1215 code = CM_ERROR_NOSUCHPATH;
1217 code = CM_ERROR_NOSUCHFILE;
1223 if ( !tscp ) /* we did not find it in the dnlc */
1226 code = cm_GetSCache(&rock.fid, &tscp, userp, reqp);
1230 /* tscp is now held */
1232 lock_ObtainWrite(&tscp->rw);
1233 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
1234 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
1236 lock_ReleaseWrite(&tscp->rw);
1237 cm_ReleaseSCache(tscp);
1240 cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
1241 /* tscp is now locked */
1243 if (!(flags & CM_FLAG_NOMOUNTCHASE)
1244 && tscp->fileType == CM_SCACHETYPE_MOUNTPOINT) {
1245 /* mount points are funny: they have a volume name to mount
1248 code = cm_ReadMountPoint(tscp, userp, reqp);
1250 code = cm_FollowMountPoint(tscp, dscp, userp, reqp,
1252 lock_ReleaseWrite(&tscp->rw);
1253 cm_ReleaseSCache(tscp);
1260 lock_ReleaseWrite(&tscp->rw);
1263 /* copy back pointer */
1266 /* insert scache in dnlc */
1267 if ( !dnlcHit && !(flags & CM_FLAG_NOMOUNTCHASE) && rock.ExactFound ) {
1268 /* lock the directory entry to prevent racing callback revokes */
1269 lock_ObtainRead(&dscp->rw);
1270 if ( dscp->cbServerp != NULL && dscp->cbExpires > 0 ) {
1271 /* TODO: reuse nnamep from above */
1274 nnamep = cm_ClientStringToNormStringAlloc(cnamep, -1, NULL);
1276 cm_dnlcEnter(dscp, nnamep, tscp);
1278 lock_ReleaseRead(&dscp->rw);
1295 int cm_ExpandSysName(clientchar_t *inp, clientchar_t *outp, long outSizeCch, unsigned int index)
1300 tp = cm_ClientStrRChr(inp, '@');
1302 return 0; /* no @sys */
1304 if (cm_ClientStrCmp(tp, _C("@sys")) != 0)
1305 return 0; /* no @sys */
1307 /* caller just wants to know if this is a valid @sys type of name */
1311 if (index >= cm_sysNameCount)
1314 /* otherwise generate the properly expanded @sys name */
1315 prefixCount = (int)(tp - inp);
1317 cm_ClientStrCpyN(outp, outSizeCch, inp, prefixCount); /* copy out "a." from "a.@sys" */
1318 outp[prefixCount] = 0; /* null terminate the "a." */
1319 cm_ClientStrCat(outp, outSizeCch, cm_sysNameList[index]);/* append i386_nt40 */
1323 long cm_EvaluateVolumeReference(clientchar_t * namep, long flags, cm_user_t * userp,
1324 cm_req_t *reqp, cm_scache_t ** outScpp)
1326 afs_uint32 code = 0;
1327 fschar_t cellName[CELL_MAXNAMELEN];
1328 fschar_t volumeName[VL_MAXNAMELEN];
1332 fschar_t * fnamep = NULL;
1334 cm_cell_t * cellp = NULL;
1335 cm_volume_t * volp = NULL;
1339 int mountType = RWVOL;
1341 osi_Log1(afsd_logp, "cm_EvaluateVolumeReference for string [%S]",
1342 osi_LogSaveClientString(afsd_logp, namep));
1344 if (cm_ClientStrCmpNI(namep, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH) != 0) {
1345 goto _exit_invalid_path;
1348 /* namep is assumed to look like the following:
1350 @vol:<cellname>%<volume>\0
1352 @vol:<cellname>#<volume>\0
1356 fnamep = cm_ClientStringToFsStringAlloc(namep, -1, NULL);
1357 cp = fnamep + CM_PREFIX_VOL_CCH; /* cp points to cell name, hopefully */
1358 tp = cm_FsStrChr(cp, '%');
1360 tp = cm_FsStrChr(cp, '#');
1362 (len = tp - cp) == 0 ||
1363 len > CELL_MAXNAMELEN)
1364 goto _exit_invalid_path;
1365 cm_FsStrCpyN(cellName, lengthof(cellName), cp, len);
1370 cp = tp+1; /* cp now points to volume, supposedly */
1371 cm_FsStrCpy(volumeName, lengthof(volumeName), cp);
1373 /* OK, now we have the cell and the volume */
1374 osi_Log2(afsd_logp, " Found cell [%s] and volume [%s]",
1375 osi_LogSaveFsString(afsd_logp, cellName),
1376 osi_LogSaveFsString(afsd_logp, volumeName));
1378 cellp = cm_GetCell(cellName, CM_FLAG_CREATE);
1379 if (cellp == NULL) {
1380 goto _exit_invalid_path;
1383 len = cm_FsStrLen(volumeName);
1384 if (len >= 8 && cm_FsStrCmp(volumeName + len - 7, ".backup") == 0)
1386 else if (len >= 10 &&
1387 cm_FsStrCmp(volumeName + len - 9, ".readonly") == 0)
1392 if (cm_VolNameIsID(volumeName)) {
1393 code = cm_FindVolumeByID(cellp, atoi(volumeName), userp, reqp,
1394 CM_GETVOL_FLAG_CREATE, &volp);
1396 code = cm_FindVolumeByName(cellp, volumeName, userp, reqp,
1397 CM_GETVOL_FLAG_CREATE, &volp);
1403 if (volType == BACKVOL)
1404 volume = volp->vol[BACKVOL].ID;
1405 else if (volType == ROVOL ||
1406 (volType == RWVOL && mountType == ROVOL && volp->vol[ROVOL].ID != 0))
1407 volume = volp->vol[ROVOL].ID;
1409 volume = volp->vol[RWVOL].ID;
1411 cm_SetFid(&fid, cellp->cellID, volume, 1, 1);
1413 code = cm_GetSCache(&fid, outScpp, userp, reqp);
1426 if (flags & CM_FLAG_CHECKPATH)
1427 return CM_ERROR_NOSUCHPATH;
1429 return CM_ERROR_NOSUCHFILE;
1432 #ifdef DEBUG_REFCOUNT
1433 long cm_LookupDbg(cm_scache_t *dscp, clientchar_t *namep, long flags, cm_user_t *userp,
1434 cm_req_t *reqp, cm_scache_t **outScpp, char * file, long line)
1436 long cm_Lookup(cm_scache_t *dscp, clientchar_t *namep, long flags, cm_user_t *userp,
1437 cm_req_t *reqp, cm_scache_t **outScpp)
1441 clientchar_t tname[AFSPATHMAX];
1442 int sysNameIndex = 0;
1443 cm_scache_t *scp = NULL;
1445 #ifdef DEBUG_REFCOUNT
1446 afsi_log("%s:%d cm_Lookup dscp 0x%p ref %d", file, line, dscp, dscp->refCount, file, line);
1447 osi_Log2(afsd_logp, "cm_Lookup dscp 0x%p ref %d", dscp, dscp->refCount);
1450 if ( cm_ClientStrCmpI(namep,_C(SMB_IOCTL_FILENAME_NOSLASH)) == 0 ) {
1451 if (flags & CM_FLAG_CHECKPATH)
1452 return CM_ERROR_NOSUCHPATH;
1454 return CM_ERROR_NOSUCHFILE;
1457 if (dscp == cm_data.rootSCachep &&
1458 cm_ClientStrCmpNI(namep, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH) == 0) {
1459 return cm_EvaluateVolumeReference(namep, flags, userp, reqp, outScpp);
1462 if (cm_ExpandSysName(namep, NULL, 0, 0) > 0) {
1463 for ( sysNameIndex = 0; sysNameIndex < MAXNUMSYSNAMES; sysNameIndex++) {
1464 code = cm_ExpandSysName(namep, tname, lengthof(tname), sysNameIndex);
1466 code = cm_LookupInternal(dscp, tname, flags, userp, reqp, &scp);
1467 #ifdef DEBUG_REFCOUNT
1468 afsi_log("%s:%d cm_LookupInternal (1) code 0x%x dscp 0x%p ref %d scp 0x%p ref %d", file, line, code, dscp, dscp->refCount, scp, scp ? scp->refCount : 0);
1469 osi_Log3(afsd_logp, "cm_LookupInternal (1) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1477 cm_ReleaseSCache(scp);
1481 code = cm_LookupInternal(dscp, namep, flags, userp, reqp, &scp);
1482 #ifdef DEBUG_REFCOUNT
1483 afsi_log("%s:%d cm_LookupInternal (2) code 0x%x dscp 0x%p ref %d scp 0x%p ref %d", file, line, code, dscp, dscp->refCount, scp, scp ? scp->refCount : 0);
1484 osi_Log3(afsd_logp, "cm_LookupInternal (2) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1491 code = cm_LookupInternal(dscp, namep, flags, userp, reqp, &scp);
1492 #ifdef DEBUG_REFCOUNT
1493 afsi_log("%s:%d cm_LookupInternal (2) code 0x%x dscp 0x%p ref %d scp 0x%p ref %d", file, line, code, dscp, dscp->refCount, scp, scp ? scp->refCount : 0);
1494 osi_Log3(afsd_logp, "cm_LookupInternal (2) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1500 /* None of the possible sysName expansions could be found */
1501 if (flags & CM_FLAG_CHECKPATH)
1502 return CM_ERROR_NOSUCHPATH;
1504 return CM_ERROR_NOSUCHFILE;
1507 /*! \brief Unlink a file name
1509 Encapsulates a call to RXAFS_RemoveFile().
1511 \param[in] dscp cm_scache_t pointing at the directory containing the
1512 name to be unlinked.
1514 \param[in] fnamep Original name to be unlinked. This is the
1515 name that will be passed into the RXAFS_RemoveFile() call.
1516 This parameter is optional. If not provided, the value will
1519 \param[in] came Client name to be unlinked. This name will be used
1520 to update the local directory caches.
1522 \param[in] userp cm_user_t for the request.
1524 \param[in] reqp Request tracker.
1527 long cm_Unlink(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t * cnamep,
1528 cm_user_t *userp, cm_req_t *reqp)
1534 AFSFetchStatus newDirStatus;
1536 struct rx_connection * rxconnp;
1538 cm_scache_t *scp = NULL;
1539 int free_fnamep = FALSE;
1541 if (fnamep == NULL) {
1544 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ, &dirop);
1546 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
1549 cm_EndDirOp(&dirop);
1556 #ifdef AFS_FREELANCE_CLIENT
1557 if (cm_freelanceEnabled && dscp == cm_data.rootSCachep) {
1558 /* deleting a mount point from the root dir. */
1559 code = cm_FreelanceRemoveMount(fnamep);
1564 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
1566 /* make sure we don't screw up the dir status during the merge */
1567 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, &dirop);
1569 lock_ObtainWrite(&dscp->rw);
1570 sflags = CM_SCACHESYNC_STOREDATA;
1571 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, sflags);
1572 lock_ReleaseWrite(&dscp->rw);
1574 cm_EndDirOp(&dirop);
1579 afsFid.Volume = dscp->fid.volume;
1580 afsFid.Vnode = dscp->fid.vnode;
1581 afsFid.Unique = dscp->fid.unique;
1583 osi_Log1(afsd_logp, "CALL RemoveFile scp 0x%p", dscp);
1585 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
1589 rxconnp = cm_GetRxConn(connp);
1590 code = RXAFS_RemoveFile(rxconnp, &afsFid, fnamep,
1591 &newDirStatus, &volSync);
1592 rx_PutConnection(rxconnp);
1594 } while (cm_Analyze(connp, userp, reqp, &dscp->fid, &volSync, NULL, NULL, code));
1595 code = cm_MapRPCError(code, reqp);
1598 osi_Log1(afsd_logp, "CALL RemoveFile FAILURE, code 0x%x", code);
1600 osi_Log0(afsd_logp, "CALL RemoveFile SUCCESS");
1603 lock_ObtainWrite(&dirop.scp->dirlock);
1604 dirop.lockType = CM_DIRLOCK_WRITE;
1606 lock_ObtainWrite(&dscp->rw);
1607 cm_dnlcRemove(dscp, cnamep);
1608 cm_SyncOpDone(dscp, NULL, sflags);
1610 cm_MergeStatus(NULL, dscp, &newDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
1611 } else if (code == CM_ERROR_NOSUCHFILE) {
1612 /* windows would not have allowed the request to delete the file
1613 * if it did not believe the file existed. therefore, we must
1614 * have an inconsistent view of the world.
1616 dscp->cbServerp = NULL;
1618 lock_ReleaseWrite(&dscp->rw);
1620 if (code == 0 && cm_CheckDirOpForSingleChange(&dirop) && cnamep) {
1621 cm_DirDeleteEntry(&dirop, fnamep);
1623 cm_BPlusDirDeleteEntry(&dirop, cnamep);
1626 cm_EndDirOp(&dirop);
1629 cm_ReleaseSCache(scp);
1631 lock_ObtainWrite(&scp->rw);
1632 if (--scp->linkCount == 0)
1633 scp->flags |= CM_SCACHEFLAG_DELETED;
1634 cm_DiscardSCache(scp);
1635 lock_ReleaseWrite(&scp->rw);
1646 /* called with a write locked vnode, and fills in the link info.
1647 * returns this the vnode still write locked.
1649 long cm_HandleLink(cm_scache_t *linkScp, cm_user_t *userp, cm_req_t *reqp)
1656 lock_AssertWrite(&linkScp->rw);
1657 if (!linkScp->mountPointStringp[0]) {
1659 #ifdef AFS_FREELANCE_CLIENT
1660 /* File servers do not have data for freelance entries */
1661 if (cm_freelanceEnabled &&
1662 linkScp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1663 linkScp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
1665 code = cm_FreelanceFetchMountPointString(linkScp);
1667 #endif /* AFS_FREELANCE_CLIENT */
1669 /* read the link data from the file server*/
1670 lock_ReleaseWrite(&linkScp->rw);
1671 thyper.LowPart = thyper.HighPart = 0;
1672 code = buf_Get(linkScp, &thyper, reqp, &bufp);
1673 lock_ObtainWrite(&linkScp->rw);
1677 code = cm_SyncOp(linkScp, bufp, userp, reqp, 0,
1678 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ);
1683 cm_SyncOpDone(linkScp, bufp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ);
1685 if (cm_HaveBuffer(linkScp, bufp, 0))
1688 code = cm_GetBuffer(linkScp, bufp, NULL, userp, reqp);
1693 } /* while loop to get the data */
1695 /* now if we still have no link read in,
1696 * copy the data from the buffer */
1697 if ((temp = linkScp->length.LowPart) >= MOUNTPOINTLEN) {
1699 return CM_ERROR_TOOBIG;
1702 /* otherwise, it fits; make sure it is still null (could have
1703 * lost race with someone else referencing this link above),
1704 * and if so, copy in the data.
1706 if (!linkScp->mountPointStringp[0]) {
1707 strncpy(linkScp->mountPointStringp, bufp->datap, temp);
1708 linkScp->mountPointStringp[temp] = 0; /* null terminate */
1713 if ( !strnicmp(linkScp->mountPointStringp, "msdfs:", strlen("msdfs:")) )
1714 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1716 } /* don't have sym link contents cached */
1721 /* called with a held vnode and a path suffix, with the held vnode being a
1722 * symbolic link. Our goal is to generate a new path to interpret, and return
1723 * this new path in newSpaceBufferp. If the new vnode is relative to a dir
1724 * other than the directory containing the symbolic link, then the new root is
1725 * returned in *newRootScpp, otherwise a null is returned there.
1727 long cm_AssembleLink(cm_scache_t *linkScp, fschar_t *pathSuffixp,
1728 cm_scache_t **newRootScpp, cm_space_t **newSpaceBufferp,
1729 cm_user_t *userp, cm_req_t *reqp)
1736 *newRootScpp = NULL;
1737 *newSpaceBufferp = NULL;
1739 lock_ObtainWrite(&linkScp->rw);
1740 code = cm_HandleLink(linkScp, userp, reqp);
1744 /* if we may overflow the buffer, bail out; buffer is signficantly
1745 * bigger than max path length, so we don't really have to worry about
1746 * being a little conservative here.
1748 if (cm_FsStrLen(linkScp->mountPointStringp) + cm_FsStrLen(pathSuffixp) + 2
1749 >= CM_UTILS_SPACESIZE) {
1750 code = CM_ERROR_TOOBIG;
1754 tsp = cm_GetSpace();
1755 linkp = linkScp->mountPointStringp;
1756 if (strncmp(linkp, cm_mountRoot, cm_mountRootLen) == 0) {
1757 if (strlen(linkp) > cm_mountRootLen)
1758 StringCbCopyA((char *) tsp->data, sizeof(tsp->data), linkp+cm_mountRootLen+1);
1761 *newRootScpp = cm_data.rootSCachep;
1762 cm_HoldSCache(cm_data.rootSCachep);
1763 } else if (linkp[0] == '\\' && linkp[1] == '\\') {
1764 if (!strnicmp(&linkp[2], cm_NetbiosName, (len = (long)strlen(cm_NetbiosName))))
1766 char * p = &linkp[len + 3];
1767 if (strnicmp(p, "all", 3) == 0)
1770 StringCbCopyA(tsp->data, sizeof(tsp->data), p);
1771 for (p = tsp->data; *p; p++) {
1775 *newRootScpp = cm_data.rootSCachep;
1776 cm_HoldSCache(cm_data.rootSCachep);
1778 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1779 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1780 code = CM_ERROR_PATH_NOT_COVERED;
1782 } else if ( linkScp->fileType == CM_SCACHETYPE_DFSLINK ||
1783 !strnicmp(linkp, "msdfs:", (len = (long)strlen("msdfs:"))) ) {
1784 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1785 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1786 code = CM_ERROR_PATH_NOT_COVERED;
1787 } else if (*linkp == '\\' || *linkp == '/') {
1789 /* formerly, this was considered to be from the AFS root,
1790 * but this seems to create problems. instead, we will just
1791 * reject the link */
1792 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp+1);
1793 *newRootScpp = cm_data.rootSCachep;
1794 cm_HoldSCache(cm_data.rootSCachep);
1796 /* we still copy the link data into the response so that
1797 * the user can see what the link points to
1799 linkScp->fileType = CM_SCACHETYPE_INVALID;
1800 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1801 code = CM_ERROR_NOSUCHPATH;
1804 /* a relative link */
1805 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1807 if (pathSuffixp[0] != 0) { /* if suffix string is non-null */
1808 StringCchCatA(tsp->data,lengthof(tsp->data), "\\");
1809 StringCchCatA(tsp->data,lengthof(tsp->data), pathSuffixp);
1813 clientchar_t * cpath = cm_FsStringToClientStringAlloc(tsp->data, -1, NULL);
1814 if (cpath != NULL) {
1815 cm_ClientStrCpy(tsp->wdata, lengthof(tsp->wdata), cpath);
1817 *newSpaceBufferp = tsp;
1819 code = CM_ERROR_NOSUCHPATH;
1826 if (code == CM_ERROR_PATH_NOT_COVERED && reqp->tidPathp && reqp->relPathp) {
1827 cm_VolStatus_Notify_DFS_Mapping(linkScp, reqp->tidPathp, reqp->relPathp);
1832 lock_ReleaseWrite(&linkScp->rw);
1835 #ifdef DEBUG_REFCOUNT
1836 long cm_NameIDbg(cm_scache_t *rootSCachep, clientchar_t *pathp, long flags,
1837 cm_user_t *userp, clientchar_t *tidPathp, cm_req_t *reqp,
1838 cm_scache_t **outScpp,
1839 char * file, long line)
1841 long cm_NameI(cm_scache_t *rootSCachep, clientchar_t *pathp, long flags,
1842 cm_user_t *userp, clientchar_t *tidPathp,
1843 cm_req_t *reqp, cm_scache_t **outScpp)
1847 clientchar_t *tp; /* ptr moving through input buffer */
1848 clientchar_t tc; /* temp char */
1849 int haveComponent; /* has new component started? */
1850 clientchar_t component[AFSPATHMAX]; /* this is the new component */
1851 clientchar_t *cp; /* component name being assembled */
1852 cm_scache_t *tscp; /* current location in the hierarchy */
1853 cm_scache_t *nscp; /* next dude down */
1854 cm_scache_t *dirScp; /* last dir we searched */
1855 cm_scache_t *linkScp; /* new root for the symlink we just
1857 cm_space_t *psp; /* space for current path, if we've hit
1859 cm_space_t *tempsp; /* temp vbl */
1860 clientchar_t *restp; /* rest of the pathname to interpret */
1861 int symlinkCount; /* count of # of symlinks traversed */
1862 int extraFlag; /* avoid chasing mt pts for dir cmd */
1863 int phase = 1; /* 1 = tidPathp, 2 = pathp */
1864 #define MAX_FID_COUNT 512
1865 cm_fid_t fids[MAX_FID_COUNT]; /* array of fids processed in this path walk */
1866 int fid_count = 0; /* number of fids processed in this path walk */
1871 #ifdef DEBUG_REFCOUNT
1872 afsi_log("%s:%d cm_NameI rootscp 0x%p ref %d", file, line, rootSCachep, rootSCachep->refCount);
1873 osi_Log4(afsd_logp,"cm_NameI rootscp 0x%p path %S tidpath %S flags 0x%x",
1874 rootSCachep, pathp ? pathp : L"<NULL>", tidPathp ? tidPathp : L"<NULL>",
1889 cm_HoldSCache(tscp);
1897 /* map Unix slashes into DOS ones so we can interpret Unix
1903 if (!haveComponent) {
1906 } else if (tc == 0) {
1920 /* we have a component here */
1921 if (tc == 0 || tc == '\\') {
1922 /* end of the component; we're at the last
1923 * component if tc == 0. However, if the last
1924 * is a symlink, we have more to do.
1926 *cp++ = 0; /* add null termination */
1928 if ((flags & CM_FLAG_DIRSEARCH) && tc == 0)
1929 extraFlag = CM_FLAG_NOMOUNTCHASE;
1930 code = cm_Lookup(tscp, component,
1932 userp, reqp, &nscp);
1935 if (!cm_ClientStrCmp(component,_C("..")) ||
1936 !cm_ClientStrCmp(component,_C("."))) {
1938 * roll back the fid list until we find the
1939 * fid that matches where we are now. Its not
1940 * necessarily one or two fids because they
1941 * might have been symlinks or mount points or
1942 * both that were crossed.
1944 for ( i=fid_count-1; i>=0; i--) {
1945 if (!cm_FidCmp(&nscp->fid, &fids[i]))
1950 /* add the new fid to the list */
1951 if (fid_count == MAX_FID_COUNT) {
1952 code = CM_ERROR_TOO_MANY_SYMLINKS;
1953 cm_ReleaseSCache(nscp);
1957 fids[fid_count++] = nscp->fid;
1962 cm_ReleaseSCache(tscp);
1964 cm_ReleaseSCache(dirScp);
1967 if ((code == CM_ERROR_NOSUCHFILE || code == CM_ERROR_BPLUS_NOMATCH) &&
1968 tscp->fileType == CM_SCACHETYPE_SYMLINK) {
1969 osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_NOSUCHPATH");
1970 return CM_ERROR_NOSUCHPATH;
1972 osi_Log1(afsd_logp,"cm_NameI code 0x%x", code);
1977 haveComponent = 0; /* component done */
1979 cm_ReleaseSCache(dirScp);
1980 dirScp = tscp; /* for some symlinks */
1981 tscp = nscp; /* already held */
1983 if (tc == 0 && !(flags & CM_FLAG_FOLLOW) && phase == 2) {
1986 cm_ReleaseSCache(dirScp);
1992 /* now, if tscp is a symlink, we should follow it and
1993 * assemble the path again.
1995 lock_ObtainWrite(&tscp->rw);
1996 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
1997 CM_SCACHESYNC_GETSTATUS
1998 | CM_SCACHESYNC_NEEDCALLBACK);
2000 lock_ReleaseWrite(&tscp->rw);
2001 cm_ReleaseSCache(tscp);
2004 cm_ReleaseSCache(dirScp);
2009 cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2011 if (tscp->fileType == CM_SCACHETYPE_SYMLINK) {
2012 /* this is a symlink; assemble a new buffer */
2013 lock_ReleaseWrite(&tscp->rw);
2014 if (symlinkCount++ >= MAX_SYMLINK_COUNT) {
2015 cm_ReleaseSCache(tscp);
2018 cm_ReleaseSCache(dirScp);
2023 osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_TOO_MANY_SYMLINKS");
2024 return CM_ERROR_TOO_MANY_SYMLINKS;
2034 /* TODO: make this better */
2035 frestp = cm_ClientStringToFsStringAlloc(restp, -1, NULL);
2036 code = cm_AssembleLink(tscp, frestp, &linkScp, &tempsp, userp, reqp);
2040 if (code == 0 && linkScp != NULL) {
2041 if (linkScp == cm_data.rootSCachep)
2044 for ( i=0; i<fid_count; i++) {
2045 if ( !cm_FidCmp(&linkScp->fid, &fids[i]) ) {
2046 code = CM_ERROR_TOO_MANY_SYMLINKS;
2047 cm_ReleaseSCache(linkScp);
2053 if (i == fid_count && fid_count < MAX_FID_COUNT) {
2054 fids[fid_count++] = linkScp->fid;
2059 /* something went wrong */
2060 cm_ReleaseSCache(tscp);
2063 cm_ReleaseSCache(dirScp);
2069 /* otherwise, tempsp has the new path,
2070 * and linkScp is the new root from
2071 * which to interpret that path.
2072 * Continue with the namei processing,
2073 * also doing the bookkeeping for the
2074 * space allocation and tracking the
2075 * vnode reference counts.
2081 cm_ReleaseSCache(tscp);
2086 * now, if linkScp is null, that's
2087 * AssembleLink's way of telling us that
2088 * the sym link is relative to the dir
2089 * containing the link. We have a ref
2090 * to it in dirScp, and we hold it now
2091 * and reuse it as the new spot in the
2099 /* not a symlink, we may be done */
2100 lock_ReleaseWrite(&tscp->rw);
2108 cm_ReleaseSCache(dirScp);
2116 cm_ReleaseSCache(dirScp);
2119 } /* end of a component */
2122 } /* we have a component */
2123 } /* big while loop over all components */
2127 cm_ReleaseSCache(dirScp);
2133 cm_ReleaseSCache(tscp);
2135 #ifdef DEBUG_REFCOUNT
2136 afsi_log("%s:%d cm_NameI code 0x%x outScpp 0x%p ref %d", file, line, code, *outScpp, (*outScpp) ? (*outScpp)->refCount : 0);
2138 osi_Log2(afsd_logp,"cm_NameI code 0x%x outScpp 0x%p", code, *outScpp);
2142 /* called with a dir, and a vnode within the dir that happens to be a symlink.
2143 * We chase the link, and return a held pointer to the target, if it exists,
2144 * in *outScpp. If we succeed, we return 0, otherwise we return an error code
2145 * and do not hold or return a target vnode.
2147 * This is very similar to calling cm_NameI with the last component of a name,
2148 * which happens to be a symlink, except that we've already passed by the name.
2150 * This function is typically called by the directory listing functions, which
2151 * encounter symlinks but need to return the proper file length so programs
2152 * like "more" work properly when they make use of the attributes retrieved from
2155 * The input vnode should not be locked when this function is called.
2157 long cm_EvaluateSymLink(cm_scache_t *dscp, cm_scache_t *linkScp,
2158 cm_scache_t **outScpp, cm_user_t *userp, cm_req_t *reqp)
2162 cm_scache_t *newRootScp;
2166 osi_Log1(afsd_logp, "Evaluating symlink scp 0x%p", linkScp);
2168 code = cm_AssembleLink(linkScp, "", &newRootScp, &spacep, userp, reqp);
2172 /* now, if newRootScp is NULL, we're really being told that the symlink
2173 * is relative to the current directory (dscp).
2175 if (newRootScp == NULL) {
2177 cm_HoldSCache(dscp);
2180 code = cm_NameI(newRootScp, spacep->wdata,
2181 CM_FLAG_CASEFOLD | CM_FLAG_FOLLOW | CM_FLAG_DIRSEARCH,
2182 userp, NULL, reqp, outScpp);
2184 if (code == CM_ERROR_NOSUCHFILE || code == CM_ERROR_BPLUS_NOMATCH)
2185 code = CM_ERROR_NOSUCHPATH;
2187 /* this stuff is allocated no matter what happened on the namei call,
2189 cm_FreeSpace(spacep);
2190 cm_ReleaseSCache(newRootScp);
2192 if (linkScp == *outScpp) {
2193 cm_ReleaseSCache(*outScpp);
2195 code = CM_ERROR_NOSUCHPATH;
2201 /* for a given entry, make sure that it isn't in the stat cache, and then
2202 * add it to the list of file IDs to be obtained.
2204 * Don't bother adding it if we already have a vnode. Note that the dir
2205 * is locked, so we have to be careful checking the vnode we're thinking of
2206 * processing, to avoid deadlocks.
2208 long cm_TryBulkProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
2219 /* Don't overflow bsp. */
2220 if (bsp->counter >= CM_BULKMAX)
2221 return CM_ERROR_STOPNOW;
2223 thyper.LowPart = cm_data.buf_blockSize;
2224 thyper.HighPart = 0;
2225 thyper = LargeIntegerAdd(thyper, bsp->bufOffset);
2227 /* thyper is now the first byte past the end of the record we're
2228 * interested in, and bsp->bufOffset is the first byte of the record
2229 * we're interested in.
2230 * Skip data in the others.
2233 if (LargeIntegerLessThan(*offp, bsp->bufOffset))
2235 if (LargeIntegerGreaterThanOrEqualTo(*offp, thyper))
2236 return CM_ERROR_STOPNOW;
2237 if (strcmp(dep->name, ".") == 0 || strcmp(dep->name, "..") == 0)
2240 cm_SetFid(&tfid, scp->fid.cell, scp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
2241 tscp = cm_FindSCache(&tfid);
2243 if (lock_TryWrite(&tscp->rw)) {
2244 /* we have an entry that we can look at */
2245 if (!(tscp->flags & CM_SCACHEFLAG_EACCESS) && cm_HaveCallback(tscp)) {
2246 /* we have a callback on it. Don't bother
2247 * fetching this stat entry, since we're happy
2248 * with the info we have.
2250 lock_ReleaseWrite(&tscp->rw);
2251 cm_ReleaseSCache(tscp);
2254 lock_ReleaseWrite(&tscp->rw);
2256 cm_ReleaseSCache(tscp);
2259 #ifdef AFS_FREELANCE_CLIENT
2260 // yj: if this is a mountpoint under root.afs then we don't want it
2261 // to be bulkstat-ed, instead, we call getSCache directly and under
2262 // getSCache, it is handled specially.
2263 if ( cm_freelanceEnabled &&
2264 tfid.cell==AFS_FAKE_ROOT_CELL_ID &&
2265 tfid.volume==AFS_FAKE_ROOT_VOL_ID &&
2266 !(tfid.vnode==0x1 && tfid.unique==0x1) )
2268 osi_Log0(afsd_logp, "cm_TryBulkProc Freelance calls cm_SCache on root.afs mountpoint");
2269 return cm_GetSCache(&tfid, &tscp, NULL, NULL);
2271 #endif /* AFS_FREELANCE_CLIENT */
2274 bsp->fids[i].Volume = scp->fid.volume;
2275 bsp->fids[i].Vnode = tfid.vnode;
2276 bsp->fids[i].Unique = tfid.unique;
2281 cm_TryBulkStatRPC(cm_scache_t *dscp, cm_bulkStat_t *bbp, cm_user_t *userp, cm_req_t *reqp)
2284 AFSCBFids fidStruct;
2285 AFSBulkStats statStruct;
2287 AFSCBs callbackStruct;
2290 cm_callbackRequest_t cbReq;
2296 struct rx_connection * rxconnp;
2297 int inlinebulk = 0; /* Did we use InlineBulkStatus RPC or not? */
2299 /* otherwise, we may have one or more bulk stat's worth of stuff in bb;
2300 * make the calls to create the entries. Handle AFSCBMAX files at a
2303 for (filex = 0; filex < bbp->counter; filex += filesThisCall) {
2304 filesThisCall = bbp->counter - filex;
2305 if (filesThisCall > AFSCBMAX)
2306 filesThisCall = AFSCBMAX;
2308 fidStruct.AFSCBFids_len = filesThisCall;
2309 fidStruct.AFSCBFids_val = &bbp->fids[filex];
2310 statStruct.AFSBulkStats_len = filesThisCall;
2311 statStruct.AFSBulkStats_val = &bbp->stats[filex];
2312 callbackStruct.AFSCBs_len = filesThisCall;
2313 callbackStruct.AFSCBs_val = &bbp->callbacks[filex];
2314 cm_StartCallbackGrantingCall(NULL, &cbReq);
2315 osi_Log1(afsd_logp, "CALL BulkStatus, %d entries", filesThisCall);
2317 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
2321 rxconnp = cm_GetRxConn(connp);
2322 if (!(connp->serverp->flags & CM_SERVERFLAG_NOINLINEBULK)) {
2323 code = RXAFS_InlineBulkStatus(rxconnp, &fidStruct,
2324 &statStruct, &callbackStruct, &volSync);
2325 if (code == RXGEN_OPCODE) {
2326 cm_SetServerNoInlineBulk(connp->serverp, 0);
2332 code = RXAFS_BulkStatus(rxconnp, &fidStruct,
2333 &statStruct, &callbackStruct, &volSync);
2335 rx_PutConnection(rxconnp);
2337 } while (cm_Analyze(connp, userp, reqp, &dscp->fid,
2338 &volSync, NULL, &cbReq, code));
2339 code = cm_MapRPCError(code, reqp);
2341 osi_Log2(afsd_logp, "CALL %sBulkStatus FAILURE code 0x%x",
2342 inlinebulk ? "Inline" : "", code);
2344 osi_Log1(afsd_logp, "CALL %sBulkStatus SUCCESS", inlinebulk ? "Inline" : "");
2346 /* may as well quit on an error, since we're not going to do
2347 * much better on the next immediate call, either.
2350 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, 0);
2354 /* otherwise, we should do the merges */
2355 for (i = 0; i<filesThisCall; i++) {
2357 cm_SetFid(&tfid, dscp->fid.cell, bbp->fids[j].Volume, bbp->fids[j].Vnode, bbp->fids[j].Unique);
2358 code = cm_GetSCache(&tfid, &scp, userp, reqp);
2362 /* otherwise, if this entry has no callback info,
2365 lock_ObtainWrite(&scp->rw);
2366 /* now, we have to be extra paranoid on merging in this
2367 * information, since we didn't use cm_SyncOp before
2368 * starting the fetch to make sure that no bad races
2369 * were occurring. Specifically, we need to make sure
2370 * we don't obliterate any newer information in the
2371 * vnode than have here.
2373 * Right now, be pretty conservative: if there's a
2374 * callback or a pending call, skip it.
2376 if ((scp->cbServerp == NULL || (scp->flags & CM_SCACHEFLAG_EACCESS))
2378 (CM_SCACHEFLAG_FETCHING
2379 | CM_SCACHEFLAG_STORING
2380 | CM_SCACHEFLAG_SIZESTORING))) {
2381 cm_EndCallbackGrantingCall(scp, &cbReq,
2383 CM_CALLBACK_MAINTAINCOUNT);
2384 cm_MergeStatus(dscp, scp, &bbp->stats[j], &volSync, userp, reqp, 0);
2386 lock_ReleaseWrite(&scp->rw);
2387 cm_ReleaseSCache(scp);
2388 } /* all files in the response */
2389 /* now tell it to drop the count,
2390 * after doing the vnode processing above */
2391 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, 0);
2392 } /* while there are still more files to process */
2394 /* If we did the InlineBulk RPC pull out the return code and log it */
2396 if ((&bbp->stats[0])->errorCode) {
2397 osi_Log1(afsd_logp, "cm_TryBulkStat bulk stat error: %d",
2398 (&bbp->stats[0])->errorCode);
2399 code = (&bbp->stats[0])->errorCode;
2406 /* called with a write locked scp and a pointer to a buffer. Make bulk stat
2407 * calls on all undeleted files in the page of the directory specified.
2410 cm_TryBulkStat(cm_scache_t *dscp, osi_hyper_t *offsetp, cm_user_t *userp,
2416 osi_Log1(afsd_logp, "cm_TryBulkStat dir 0x%p", dscp);
2418 /* should be on a buffer boundary */
2419 osi_assertx((offsetp->LowPart & (cm_data.buf_blockSize - 1)) == 0, "invalid offset");
2421 bbp = malloc(sizeof(cm_bulkStat_t));
2422 memset(bbp, 0, sizeof(cm_bulkStat_t));
2423 bbp->bufOffset = *offsetp;
2425 lock_ReleaseWrite(&dscp->rw);
2426 /* first, assemble the file IDs we need to stat */
2427 code = cm_ApplyDir(dscp, cm_TryBulkProc, (void *) bbp, offsetp, userp, reqp, NULL);
2429 /* if we failed, bail out early */
2430 if (code && code != CM_ERROR_STOPNOW) {
2432 lock_ObtainWrite(&dscp->rw);
2436 code = cm_TryBulkStatRPC(dscp, bbp, userp, reqp);
2437 osi_Log1(afsd_logp, "END cm_TryBulkStat code 0x%x", code);
2439 lock_ObtainWrite(&dscp->rw);
2444 void cm_StatusFromAttr(AFSStoreStatus *statusp, cm_scache_t *scp, cm_attr_t *attrp)
2448 /* initialize store back mask as inexpensive local variable */
2450 memset(statusp, 0, sizeof(AFSStoreStatus));
2452 /* copy out queued info from scache first, if scp passed in */
2454 if (scp->mask & CM_SCACHEMASK_CLIENTMODTIME) {
2455 statusp->ClientModTime = scp->clientModTime;
2456 mask |= AFS_SETMODTIME;
2457 scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
2462 /* now add in our locally generated request */
2463 if (attrp->mask & CM_ATTRMASK_CLIENTMODTIME) {
2464 statusp->ClientModTime = attrp->clientModTime;
2465 mask |= AFS_SETMODTIME;
2467 if (attrp->mask & CM_ATTRMASK_UNIXMODEBITS) {
2468 statusp->UnixModeBits = attrp->unixModeBits;
2469 mask |= AFS_SETMODE;
2471 if (attrp->mask & CM_ATTRMASK_OWNER) {
2472 statusp->Owner = attrp->owner;
2473 mask |= AFS_SETOWNER;
2475 if (attrp->mask & CM_ATTRMASK_GROUP) {
2476 statusp->Group = attrp->group;
2477 mask |= AFS_SETGROUP;
2480 statusp->Mask = mask;
2483 /* set the file size, and make sure that all relevant buffers have been
2484 * truncated. Ensure that any partially truncated buffers have been zeroed
2485 * to the end of the buffer.
2487 long cm_SetLength(cm_scache_t *scp, osi_hyper_t *sizep, cm_user_t *userp,
2493 /* start by locking out buffer creation */
2494 lock_ObtainWrite(&scp->bufCreateLock);
2496 /* verify that this is a file, not a dir or a symlink */
2497 lock_ObtainWrite(&scp->rw);
2498 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
2499 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2502 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2504 if (scp->fileType != CM_SCACHETYPE_FILE) {
2505 code = CM_ERROR_ISDIR;
2510 if (LargeIntegerLessThan(*sizep, scp->length))
2515 lock_ReleaseWrite(&scp->rw);
2517 /* can't hold scp->rw lock here, since we may wait for a storeback to
2518 * finish if the buffer package is cleaning a buffer by storing it to
2522 buf_Truncate(scp, userp, reqp, sizep);
2524 /* now ensure that file length is short enough, and update truncPos */
2525 lock_ObtainWrite(&scp->rw);
2527 /* make sure we have a callback (so we have the right value for the
2528 * length), and wait for it to be safe to do a truncate.
2530 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_WRITE,
2531 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2532 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2534 /* If we only have 'i' bits, then we should still be able to set
2535 the size of a file we created. */
2536 if (code == CM_ERROR_NOACCESS && scp->creator == userp) {
2537 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
2538 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2539 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2545 if (LargeIntegerLessThan(*sizep, scp->length)) {
2546 /* a real truncation. If truncPos is not set yet, or is bigger
2547 * than where we're truncating the file, set truncPos to this
2552 if (!(scp->mask & CM_SCACHEMASK_TRUNCPOS)
2553 || LargeIntegerLessThan(*sizep, scp->length)) {
2555 scp->truncPos = *sizep;
2556 scp->mask |= CM_SCACHEMASK_TRUNCPOS;
2558 /* in either case, the new file size has been changed */
2559 scp->length = *sizep;
2560 scp->mask |= CM_SCACHEMASK_LENGTH;
2562 else if (LargeIntegerGreaterThan(*sizep, scp->length)) {
2563 /* really extending the file */
2564 scp->length = *sizep;
2565 scp->mask |= CM_SCACHEMASK_LENGTH;
2568 /* done successfully */
2571 cm_SyncOpDone(scp, NULL,
2572 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2573 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2576 lock_ReleaseWrite(&scp->rw);
2577 lock_ReleaseWrite(&scp->bufCreateLock);
2582 /* set the file size or other attributes (but not both at once) */
2583 long cm_SetAttr(cm_scache_t *scp, cm_attr_t *attrp, cm_user_t *userp,
2587 AFSFetchStatus afsOutStatus;
2591 AFSStoreStatus afsInStatus;
2592 struct rx_connection * rxconnp;
2594 /* handle file length setting */
2595 if (attrp->mask & CM_ATTRMASK_LENGTH)
2596 return cm_SetLength(scp, &attrp->length, userp, reqp);
2598 lock_ObtainWrite(&scp->rw);
2599 /* otherwise, we have to make an RPC to get the status */
2600 code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STORESTATUS);
2602 lock_ReleaseWrite(&scp->rw);
2605 lock_ConvertWToR(&scp->rw);
2607 /* make the attr structure */
2608 cm_StatusFromAttr(&afsInStatus, scp, attrp);
2610 tfid.Volume = scp->fid.volume;
2611 tfid.Vnode = scp->fid.vnode;
2612 tfid.Unique = scp->fid.unique;
2613 lock_ReleaseRead(&scp->rw);
2615 /* now make the RPC */
2616 osi_Log1(afsd_logp, "CALL StoreStatus scp 0x%p", scp);
2618 code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
2622 rxconnp = cm_GetRxConn(connp);
2623 code = RXAFS_StoreStatus(rxconnp, &tfid,
2624 &afsInStatus, &afsOutStatus, &volSync);
2625 rx_PutConnection(rxconnp);
2627 } while (cm_Analyze(connp, userp, reqp,
2628 &scp->fid, &volSync, NULL, NULL, code));
2629 code = cm_MapRPCError(code, reqp);
2632 osi_Log1(afsd_logp, "CALL StoreStatus FAILURE, code 0x%x", code);
2634 osi_Log0(afsd_logp, "CALL StoreStatus SUCCESS");
2636 lock_ObtainWrite(&scp->rw);
2637 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STORESTATUS);
2639 cm_MergeStatus(NULL, scp, &afsOutStatus, &volSync, userp, reqp,
2640 CM_MERGEFLAG_FORCE|CM_MERGEFLAG_STOREDATA);
2642 /* if we're changing the mode bits, discard the ACL cache,
2643 * since we changed the mode bits.
2645 if (afsInStatus.Mask & AFS_SETMODE)
2646 cm_FreeAllACLEnts(scp);
2647 lock_ReleaseWrite(&scp->rw);
2651 long cm_Create(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
2652 cm_scache_t **scpp, cm_user_t *userp, cm_req_t *reqp)
2657 cm_callbackRequest_t cbReq;
2660 cm_scache_t *scp = NULL;
2662 AFSStoreStatus inStatus;
2663 AFSFetchStatus updatedDirStatus;
2664 AFSFetchStatus newFileStatus;
2665 AFSCallBack newFileCallback;
2667 struct rx_connection * rxconnp;
2669 fschar_t * fnamep = NULL;
2671 /* can't create names with @sys in them; must expand it manually first.
2672 * return "invalid request" if they try.
2674 if (cm_ExpandSysName(cnamep, NULL, 0, 0)) {
2675 return CM_ERROR_ATSYS;
2678 #ifdef AFS_FREELANCE_CLIENT
2679 /* Freelance root volume does not hold files */
2680 if (cm_freelanceEnabled &&
2681 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
2682 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
2684 return CM_ERROR_NOACCESS;
2686 #endif /* AFS_FREELANCE_CLIENT */
2688 /* before starting the RPC, mark that we're changing the file data, so
2689 * that someone who does a chmod will know to wait until our call
2692 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, &dirop);
2693 lock_ObtainWrite(&dscp->rw);
2694 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
2695 lock_ReleaseWrite(&dscp->rw);
2697 cm_StartCallbackGrantingCall(NULL, &cbReq);
2699 cm_EndDirOp(&dirop);
2706 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
2708 cm_StatusFromAttr(&inStatus, NULL, attrp);
2710 /* try the RPC now */
2711 osi_Log1(afsd_logp, "CALL CreateFile scp 0x%p", dscp);
2713 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
2717 dirAFSFid.Volume = dscp->fid.volume;
2718 dirAFSFid.Vnode = dscp->fid.vnode;
2719 dirAFSFid.Unique = dscp->fid.unique;
2721 rxconnp = cm_GetRxConn(connp);
2722 code = RXAFS_CreateFile(connp->rxconnp, &dirAFSFid, fnamep,
2723 &inStatus, &newAFSFid, &newFileStatus,
2724 &updatedDirStatus, &newFileCallback,
2726 rx_PutConnection(rxconnp);
2728 } while (cm_Analyze(connp, userp, reqp,
2729 &dscp->fid, &volSync, NULL, &cbReq, code));
2730 code = cm_MapRPCError(code, reqp);
2733 osi_Log1(afsd_logp, "CALL CreateFile FAILURE, code 0x%x", code);
2735 osi_Log0(afsd_logp, "CALL CreateFile SUCCESS");
2738 lock_ObtainWrite(&dirop.scp->dirlock);
2739 dirop.lockType = CM_DIRLOCK_WRITE;
2741 lock_ObtainWrite(&dscp->rw);
2742 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
2744 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
2746 lock_ReleaseWrite(&dscp->rw);
2748 /* now try to create the file's entry, too, but be careful to
2749 * make sure that we don't merge in old info. Since we weren't locking
2750 * out any requests during the file's creation, we may have pretty old
2754 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
2755 code = cm_GetSCache(&newFid, &scp, userp, reqp);
2757 lock_ObtainWrite(&scp->rw);
2758 scp->creator = userp; /* remember who created it */
2759 if (!cm_HaveCallback(scp)) {
2760 cm_MergeStatus(dscp, scp, &newFileStatus, &volSync,
2762 cm_EndCallbackGrantingCall(scp, &cbReq,
2763 &newFileCallback, 0);
2766 lock_ReleaseWrite(&scp->rw);
2770 /* make sure we end things properly */
2772 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, 0);
2774 if (scp && cm_CheckDirOpForSingleChange(&dirop)) {
2775 cm_DirCreateEntry(&dirop, fnamep, &newFid);
2777 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
2780 cm_EndDirOp(&dirop);
2789 cm_ReleaseSCache(scp);
2794 long cm_FSync(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp)
2798 code = buf_CleanVnode(scp, userp, reqp);
2800 lock_ObtainWrite(&scp->rw);
2802 if (scp->mask & (CM_SCACHEMASK_TRUNCPOS
2803 | CM_SCACHEMASK_CLIENTMODTIME
2804 | CM_SCACHEMASK_LENGTH))
2805 code = cm_StoreMini(scp, userp, reqp);
2807 if (scp->flags & (CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE)) {
2808 code = (scp->flags & CM_SCACHEFLAG_OVERQUOTA) ? CM_ERROR_QUOTA : CM_ERROR_SPACE;
2809 scp->flags &= ~(CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE);
2812 lock_ReleaseWrite(&scp->rw);
2817 long cm_MakeDir(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
2818 cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
2823 cm_callbackRequest_t cbReq;
2826 cm_scache_t *scp = NULL;
2828 AFSStoreStatus inStatus;
2829 AFSFetchStatus updatedDirStatus;
2830 AFSFetchStatus newDirStatus;
2831 AFSCallBack newDirCallback;
2833 struct rx_connection * rxconnp;
2835 fschar_t * fnamep = NULL;
2837 /* can't create names with @sys in them; must expand it manually first.
2838 * return "invalid request" if they try.
2840 if (cm_ExpandSysName(cnamep, NULL, 0, 0)) {
2841 return CM_ERROR_ATSYS;
2844 #ifdef AFS_FREELANCE_CLIENT
2845 /* Freelance root volume does not hold subdirectories */
2846 if (cm_freelanceEnabled &&
2847 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
2848 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
2850 return CM_ERROR_NOACCESS;
2852 #endif /* AFS_FREELANCE_CLIENT */
2854 /* before starting the RPC, mark that we're changing the directory
2855 * data, so that someone who does a chmod on the dir will wait until
2856 * our call completes.
2858 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, &dirop);
2859 lock_ObtainWrite(&dscp->rw);
2860 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
2861 lock_ReleaseWrite(&dscp->rw);
2863 cm_StartCallbackGrantingCall(NULL, &cbReq);
2865 cm_EndDirOp(&dirop);
2872 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
2873 cm_StatusFromAttr(&inStatus, NULL, attrp);
2875 /* try the RPC now */
2876 osi_Log1(afsd_logp, "CALL MakeDir scp 0x%p", dscp);
2878 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
2882 dirAFSFid.Volume = dscp->fid.volume;
2883 dirAFSFid.Vnode = dscp->fid.vnode;
2884 dirAFSFid.Unique = dscp->fid.unique;
2886 rxconnp = cm_GetRxConn(connp);
2887 code = RXAFS_MakeDir(connp->rxconnp, &dirAFSFid, fnamep,
2888 &inStatus, &newAFSFid, &newDirStatus,
2889 &updatedDirStatus, &newDirCallback,
2891 rx_PutConnection(rxconnp);
2893 } while (cm_Analyze(connp, userp, reqp,
2894 &dscp->fid, &volSync, NULL, &cbReq, code));
2895 code = cm_MapRPCError(code, reqp);
2898 osi_Log1(afsd_logp, "CALL MakeDir FAILURE, code 0x%x", code);
2900 osi_Log0(afsd_logp, "CALL MakeDir SUCCESS");
2903 lock_ObtainWrite(&dirop.scp->dirlock);
2904 dirop.lockType = CM_DIRLOCK_WRITE;
2906 lock_ObtainWrite(&dscp->rw);
2907 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
2909 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
2911 lock_ReleaseWrite(&dscp->rw);
2913 /* now try to create the new dir's entry, too, but be careful to
2914 * make sure that we don't merge in old info. Since we weren't locking
2915 * out any requests during the file's creation, we may have pretty old
2919 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
2920 code = cm_GetSCache(&newFid, &scp, userp, reqp);
2922 lock_ObtainWrite(&scp->rw);
2923 if (!cm_HaveCallback(scp)) {
2924 cm_MergeStatus(dscp, scp, &newDirStatus, &volSync,
2926 cm_EndCallbackGrantingCall(scp, &cbReq,
2927 &newDirCallback, 0);
2930 lock_ReleaseWrite(&scp->rw);
2934 /* make sure we end things properly */
2936 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, 0);
2938 if (scp && cm_CheckDirOpForSingleChange(&dirop)) {
2939 cm_DirCreateEntry(&dirop, fnamep, &newFid);
2941 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
2944 cm_EndDirOp(&dirop);
2952 cm_ReleaseSCache(scp);
2955 /* and return error code */
2959 long cm_Link(cm_scache_t *dscp, clientchar_t *cnamep, cm_scache_t *sscp, long flags,
2960 cm_user_t *userp, cm_req_t *reqp)
2965 AFSFid existingAFSFid;
2966 AFSFetchStatus updatedDirStatus;
2967 AFSFetchStatus newLinkStatus;
2969 struct rx_connection * rxconnp;
2971 fschar_t * fnamep = NULL;
2973 if (dscp->fid.cell != sscp->fid.cell ||
2974 dscp->fid.volume != sscp->fid.volume) {
2975 return CM_ERROR_CROSSDEVLINK;
2978 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, &dirop);
2979 lock_ObtainWrite(&dscp->rw);
2980 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
2981 lock_ReleaseWrite(&dscp->rw);
2983 cm_EndDirOp(&dirop);
2988 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
2990 /* try the RPC now */
2991 osi_Log1(afsd_logp, "CALL Link scp 0x%p", dscp);
2993 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
2996 dirAFSFid.Volume = dscp->fid.volume;
2997 dirAFSFid.Vnode = dscp->fid.vnode;
2998 dirAFSFid.Unique = dscp->fid.unique;
3000 existingAFSFid.Volume = sscp->fid.volume;
3001 existingAFSFid.Vnode = sscp->fid.vnode;
3002 existingAFSFid.Unique = sscp->fid.unique;
3004 rxconnp = cm_GetRxConn(connp);
3005 code = RXAFS_Link(rxconnp, &dirAFSFid, fnamep, &existingAFSFid,
3006 &newLinkStatus, &updatedDirStatus, &volSync);
3007 rx_PutConnection(rxconnp);
3008 osi_Log1(afsd_logp," RXAFS_Link returns 0x%x", code);
3010 } while (cm_Analyze(connp, userp, reqp,
3011 &dscp->fid, &volSync, NULL, NULL, code));
3013 code = cm_MapRPCError(code, reqp);
3016 osi_Log1(afsd_logp, "CALL Link FAILURE, code 0x%x", code);
3018 osi_Log0(afsd_logp, "CALL Link SUCCESS");
3021 lock_ObtainWrite(&dirop.scp->dirlock);
3022 dirop.lockType = CM_DIRLOCK_WRITE;
3024 lock_ObtainWrite(&dscp->rw);
3025 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3027 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3029 lock_ReleaseWrite(&dscp->rw);
3032 if (cm_CheckDirOpForSingleChange(&dirop)) {
3033 cm_DirCreateEntry(&dirop, fnamep, &sscp->fid);
3035 cm_BPlusDirCreateEntry(&dirop, cnamep, &sscp->fid);
3039 cm_EndDirOp(&dirop);
3041 /* Update the linked object status */
3043 lock_ObtainWrite(&sscp->rw);
3044 cm_MergeStatus(NULL, sscp, &newLinkStatus, &volSync, userp, reqp, 0);
3045 lock_ReleaseWrite(&sscp->rw);
3053 long cm_SymLink(cm_scache_t *dscp, clientchar_t *cnamep, fschar_t *contentsp, long flags,
3054 cm_attr_t *attrp, cm_user_t *userp, cm_req_t *reqp)
3062 AFSStoreStatus inStatus;
3063 AFSFetchStatus updatedDirStatus;
3064 AFSFetchStatus newLinkStatus;
3066 struct rx_connection * rxconnp;
3068 fschar_t *fnamep = NULL;
3070 /* before starting the RPC, mark that we're changing the directory data,
3071 * so that someone who does a chmod on the dir will wait until our
3074 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, &dirop);
3075 lock_ObtainWrite(&dscp->rw);
3076 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3077 lock_ReleaseWrite(&dscp->rw);
3079 cm_EndDirOp(&dirop);
3084 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3086 cm_StatusFromAttr(&inStatus, NULL, attrp);
3088 /* try the RPC now */
3089 osi_Log1(afsd_logp, "CALL Symlink scp 0x%p", dscp);
3091 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3095 dirAFSFid.Volume = dscp->fid.volume;
3096 dirAFSFid.Vnode = dscp->fid.vnode;
3097 dirAFSFid.Unique = dscp->fid.unique;
3099 rxconnp = cm_GetRxConn(connp);
3100 code = RXAFS_Symlink(rxconnp, &dirAFSFid, fnamep, contentsp,
3101 &inStatus, &newAFSFid, &newLinkStatus,
3102 &updatedDirStatus, &volSync);
3103 rx_PutConnection(rxconnp);
3105 } while (cm_Analyze(connp, userp, reqp,
3106 &dscp->fid, &volSync, NULL, NULL, code));
3107 code = cm_MapRPCError(code, reqp);
3110 osi_Log1(afsd_logp, "CALL Symlink FAILURE, code 0x%x", code);
3112 osi_Log0(afsd_logp, "CALL Symlink SUCCESS");
3115 lock_ObtainWrite(&dirop.scp->dirlock);
3116 dirop.lockType = CM_DIRLOCK_WRITE;
3118 lock_ObtainWrite(&dscp->rw);
3119 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3121 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3123 lock_ReleaseWrite(&dscp->rw);
3126 if (cm_CheckDirOpForSingleChange(&dirop)) {
3127 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3129 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3131 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3135 cm_EndDirOp(&dirop);
3137 /* now try to create the new dir's entry, too, but be careful to
3138 * make sure that we don't merge in old info. Since we weren't locking
3139 * out any requests during the file's creation, we may have pretty old
3143 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3144 code = cm_GetSCache(&newFid, &scp, userp, reqp);
3146 lock_ObtainWrite(&scp->rw);
3147 if (!cm_HaveCallback(scp)) {
3148 cm_MergeStatus(dscp, scp, &newLinkStatus, &volSync,
3151 lock_ReleaseWrite(&scp->rw);
3152 cm_ReleaseSCache(scp);
3158 /* and return error code */
3162 /*! \brief Remove a directory
3164 Encapsulates a call to RXAFS_RemoveDir().
3166 \param[in] dscp cm_scache_t for the directory containing the
3167 directory to be removed.
3169 \param[in] fnamep This will be the original name of the directory
3170 as known to the file server. It will be passed in to RXAFS_RemoveDir().
3171 This parameter is optional. If it is not provided the value
3174 \param[in] cnamep Normalized name used to update the local
3177 \param[in] userp cm_user_t for the request.
3179 \param[in] reqp Request tracker.
3181 long cm_RemoveDir(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t *cnamep, cm_user_t *userp, cm_req_t *reqp)
3187 AFSFetchStatus updatedDirStatus;
3189 struct rx_connection * rxconnp;
3191 cm_scache_t *scp = NULL;
3192 int free_fnamep = FALSE;
3194 if (fnamep == NULL) {
3197 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ, &dirop);
3199 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
3202 cm_EndDirOp(&dirop);
3209 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
3213 /* before starting the RPC, mark that we're changing the directory data,
3214 * so that someone who does a chmod on the dir will wait until our
3217 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, &dirop);
3218 lock_ObtainWrite(&dscp->rw);
3219 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3220 lock_ReleaseWrite(&dscp->rw);
3222 cm_EndDirOp(&dirop);
3227 /* try the RPC now */
3228 osi_Log1(afsd_logp, "CALL RemoveDir scp 0x%p", dscp);
3230 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3234 dirAFSFid.Volume = dscp->fid.volume;
3235 dirAFSFid.Vnode = dscp->fid.vnode;
3236 dirAFSFid.Unique = dscp->fid.unique;
3238 rxconnp = cm_GetRxConn(connp);
3239 code = RXAFS_RemoveDir(rxconnp, &dirAFSFid, fnamep,
3240 &updatedDirStatus, &volSync);
3241 rx_PutConnection(rxconnp);
3243 } while (cm_Analyze(connp, userp, reqp,
3244 &dscp->fid, &volSync, NULL, NULL, code));
3245 code = cm_MapRPCErrorRmdir(code, reqp);
3248 osi_Log1(afsd_logp, "CALL RemoveDir FAILURE, code 0x%x", code);
3250 osi_Log0(afsd_logp, "CALL RemoveDir SUCCESS");
3253 lock_ObtainWrite(&dirop.scp->dirlock);
3254 dirop.lockType = CM_DIRLOCK_WRITE;
3256 lock_ObtainWrite(&dscp->rw);
3257 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3259 cm_dnlcRemove(dscp, cnamep);
3260 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3262 lock_ReleaseWrite(&dscp->rw);
3265 if (cm_CheckDirOpForSingleChange(&dirop) && cnamep != NULL) {
3266 cm_DirDeleteEntry(&dirop, fnamep);
3268 cm_BPlusDirDeleteEntry(&dirop, cnamep);
3272 cm_EndDirOp(&dirop);
3275 cm_ReleaseSCache(scp);
3277 lock_ObtainWrite(&scp->rw);
3278 scp->flags |= CM_SCACHEFLAG_DELETED;
3279 lock_ReleaseWrite(&scp->rw);
3287 /* and return error code */
3291 long cm_Open(cm_scache_t *scp, int type, cm_user_t *userp)
3293 /* grab mutex on contents */
3294 lock_ObtainWrite(&scp->rw);
3296 /* reset the prefetch info */
3297 scp->prefetch.base.LowPart = 0; /* base */
3298 scp->prefetch.base.HighPart = 0;
3299 scp->prefetch.end.LowPart = 0; /* and end */
3300 scp->prefetch.end.HighPart = 0;
3302 /* release mutex on contents */
3303 lock_ReleaseWrite(&scp->rw);
3309 /*! \brief Rename a file or directory
3311 Encapsulates a RXAFS_Rename() call.
3313 \param[in] oldDscp cm_scache_t for the directory containing the old
3316 \param[in] oldNamep The original old name known to the file server.
3317 This is the name that will be passed into the RXAFS_Rename().
3318 If it is not provided, it will be looked up.
3320 \param[in] normalizedOldNamep Normalized old name. This is used for
3321 updating local directory caches.
3323 \param[in] newDscp cm_scache_t for the directory containing the new
3326 \param[in] newNamep New name. Normalized.
3328 \param[in] userp cm_user_t for the request.
3330 \param[in,out] reqp Request tracker.
3333 long cm_Rename(cm_scache_t *oldDscp, fschar_t *oldNamep, clientchar_t *cOldNamep,
3334 cm_scache_t *newDscp, clientchar_t *cNewNamep, cm_user_t *userp,
3339 AFSFid oldDirAFSFid;
3340 AFSFid newDirAFSFid;
3342 AFSFetchStatus updatedOldDirStatus;
3343 AFSFetchStatus updatedNewDirStatus;
3346 struct rx_connection * rxconnp;
3347 cm_dirOp_t oldDirOp;
3350 cm_dirOp_t newDirOp;
3351 fschar_t * newNamep = NULL;
3352 int free_oldNamep = FALSE;
3353 cm_scache_t *oldScp = NULL, *newScp = NULL;
3355 if (cOldNamep == NULL || cNewNamep == NULL ||
3356 cm_ClientStrLen(cOldNamep) == 0 ||
3357 cm_ClientStrLen(cNewNamep) == 0)
3358 return CM_ERROR_INVAL;
3361 * Before we permit the operation, make sure that we do not already have
3362 * an object in the destination directory that has a case-insensitive match
3363 * for this name UNLESS the matching object is the object we are renaming.
3365 code = cm_Lookup(oldDscp, cOldNamep, 0, userp, reqp, &oldScp);
3367 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S old name lookup failed",
3368 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3372 code = cm_Lookup(newDscp, cNewNamep, CM_FLAG_CASEFOLD, userp, reqp, &newScp);
3374 /* found a matching object with the new name */
3375 if (cm_FidCmp(&oldScp->fid, &newScp->fid)) {
3376 /* and they don't match so return an error */
3377 osi_Log2(afsd_logp, "cm_Rename newDscp 0x%p cNewName %S new name already exists",
3378 newDscp, osi_LogSaveStringW(afsd_logp, cNewNamep));
3379 code = CM_ERROR_EXISTS;
3381 cm_ReleaseSCache(newScp);
3383 } else if (code == CM_ERROR_AMBIGUOUS_FILENAME) {
3384 code = CM_ERROR_EXISTS;
3391 if (oldNamep == NULL) {
3394 code = cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_READ, &oldDirOp);
3396 code = cm_BPlusDirLookupOriginalName(&oldDirOp, cOldNamep, &oldNamep);
3398 free_oldNamep = TRUE;
3399 cm_EndDirOp(&oldDirOp);
3403 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S Original Name lookup failed",
3404 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3410 /* before starting the RPC, mark that we're changing the directory data,
3411 * so that someone who does a chmod on the dir will wait until our call
3412 * completes. We do this in vnode order so that we don't deadlock,
3413 * which makes the code a little verbose.
3415 if (oldDscp == newDscp) {
3416 /* check for identical names */
3417 if (cm_ClientStrCmp(cOldNamep, cNewNamep) == 0) {
3418 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_RENAME_IDENTICAL",
3420 code = CM_ERROR_RENAME_IDENTICAL;
3425 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE, &oldDirOp);
3426 lock_ObtainWrite(&oldDscp->rw);
3427 cm_dnlcRemove(oldDscp, cOldNamep);
3428 cm_dnlcRemove(oldDscp, cNewNamep);
3429 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3430 CM_SCACHESYNC_STOREDATA);
3431 lock_ReleaseWrite(&oldDscp->rw);
3433 cm_EndDirOp(&oldDirOp);
3437 /* two distinct dir vnodes */
3439 if (oldDscp->fid.cell != newDscp->fid.cell ||
3440 oldDscp->fid.volume != newDscp->fid.volume) {
3441 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_CROSSDEVLINK",
3443 code = CM_ERROR_CROSSDEVLINK;
3447 /* shouldn't happen that we have distinct vnodes for two
3448 * different files, but could due to deliberate attack, or
3449 * stale info. Avoid deadlocks and quit now.
3451 if (oldDscp->fid.vnode == newDscp->fid.vnode) {
3452 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p vnode collision",
3454 code = CM_ERROR_CROSSDEVLINK;
3458 if (oldDscp->fid.vnode < newDscp->fid.vnode) {
3459 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE, &oldDirOp);
3460 lock_ObtainWrite(&oldDscp->rw);
3461 cm_dnlcRemove(oldDscp, cOldNamep);
3462 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3463 CM_SCACHESYNC_STOREDATA);
3464 lock_ReleaseWrite(&oldDscp->rw);
3466 cm_EndDirOp(&oldDirOp);
3468 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE, &newDirOp);
3469 lock_ObtainWrite(&newDscp->rw);
3470 cm_dnlcRemove(newDscp, cNewNamep);
3471 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3472 CM_SCACHESYNC_STOREDATA);
3473 lock_ReleaseWrite(&newDscp->rw);
3475 cm_EndDirOp(&newDirOp);
3477 /* cleanup first one */
3478 lock_ObtainWrite(&oldDscp->rw);
3479 cm_SyncOpDone(oldDscp, NULL,
3480 CM_SCACHESYNC_STOREDATA);
3481 lock_ReleaseWrite(&oldDscp->rw);
3482 cm_EndDirOp(&oldDirOp);
3487 /* lock the new vnode entry first */
3488 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE, &newDirOp);
3489 lock_ObtainWrite(&newDscp->rw);
3490 cm_dnlcRemove(newDscp, cNewNamep);
3491 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3492 CM_SCACHESYNC_STOREDATA);
3493 lock_ReleaseWrite(&newDscp->rw);
3495 cm_EndDirOp(&newDirOp);
3497 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE, &oldDirOp);
3498 lock_ObtainWrite(&oldDscp->rw);
3499 cm_dnlcRemove(oldDscp, cOldNamep);
3500 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3501 CM_SCACHESYNC_STOREDATA);
3502 lock_ReleaseWrite(&oldDscp->rw);
3504 cm_EndDirOp(&oldDirOp);
3506 /* cleanup first one */
3507 lock_ObtainWrite(&newDscp->rw);
3508 cm_SyncOpDone(newDscp, NULL,
3509 CM_SCACHESYNC_STOREDATA);
3510 lock_ReleaseWrite(&newDscp->rw);
3511 cm_EndDirOp(&newDirOp);
3515 } /* two distinct vnodes */
3522 newNamep = cm_ClientStringToFsStringAlloc(cNewNamep, -1, NULL);
3524 /* try the RPC now */
3525 osi_Log2(afsd_logp, "CALL Rename old scp 0x%p new scp 0x%p",
3528 code = cm_ConnFromFID(&oldDscp->fid, userp, reqp, &connp);
3532 oldDirAFSFid.Volume = oldDscp->fid.volume;
3533 oldDirAFSFid.Vnode = oldDscp->fid.vnode;
3534 oldDirAFSFid.Unique = oldDscp->fid.unique;
3535 newDirAFSFid.Volume = newDscp->fid.volume;
3536 newDirAFSFid.Vnode = newDscp->fid.vnode;
3537 newDirAFSFid.Unique = newDscp->fid.unique;
3539 rxconnp = cm_GetRxConn(connp);
3540 code = RXAFS_Rename(rxconnp, &oldDirAFSFid, oldNamep,
3541 &newDirAFSFid, newNamep,
3542 &updatedOldDirStatus, &updatedNewDirStatus,
3544 rx_PutConnection(rxconnp);
3546 } while (cm_Analyze(connp, userp, reqp, &oldDscp->fid,
3547 &volSync, NULL, NULL, code));
3548 code = cm_MapRPCError(code, reqp);
3551 osi_Log1(afsd_logp, "CALL Rename FAILURE, code 0x%x", code);
3553 osi_Log0(afsd_logp, "CALL Rename SUCCESS");
3555 /* update the individual stat cache entries for the directories */
3557 lock_ObtainWrite(&oldDirOp.scp->dirlock);
3558 oldDirOp.lockType = CM_DIRLOCK_WRITE;
3560 lock_ObtainWrite(&oldDscp->rw);
3561 cm_SyncOpDone(oldDscp, NULL, CM_SCACHESYNC_STOREDATA);
3564 cm_MergeStatus(NULL, oldDscp, &updatedOldDirStatus, &volSync,
3565 userp, reqp, CM_MERGEFLAG_DIROP);
3566 lock_ReleaseWrite(&oldDscp->rw);
3568 if (code == 0 && cm_CheckDirOpForSingleChange(&oldDirOp)) {
3570 diropCode = cm_BPlusDirLookup(&oldDirOp, cOldNamep, &fileFid);
3571 if (diropCode == CM_ERROR_INEXACT_MATCH)
3573 else if (diropCode == EINVAL)
3575 diropCode = cm_DirLookup(&oldDirOp, oldNamep, &fileFid);
3577 if (diropCode == 0) {
3579 diropCode = cm_DirCreateEntry(&oldDirOp, newNamep, &fileFid);
3581 cm_BPlusDirCreateEntry(&oldDirOp, cNewNamep, &fileFid);
3585 if (diropCode == 0) {
3586 diropCode = cm_DirDeleteEntry(&oldDirOp, oldNamep);
3588 cm_BPlusDirDeleteEntry(&oldDirOp, cOldNamep);
3593 cm_EndDirOp(&oldDirOp);
3595 /* and update it for the new one, too, if necessary */
3598 lock_ObtainWrite(&newDirOp.scp->dirlock);
3599 newDirOp.lockType = CM_DIRLOCK_WRITE;
3601 lock_ObtainWrite(&newDscp->rw);
3602 cm_SyncOpDone(newDscp, NULL, CM_SCACHESYNC_STOREDATA);
3604 cm_MergeStatus(NULL, newDscp, &updatedNewDirStatus, &volSync,
3605 userp, reqp, CM_MERGEFLAG_DIROP);
3606 lock_ReleaseWrite(&newDscp->rw);
3610 * The following optimization does not work.
3611 * When the file server processed a RXAFS_Rename() request the
3612 * FID of the object being moved between directories is not
3613 * preserved. The client does not know the new FID nor the
3614 * version number of the target. Not only can we not create
3615 * the directory entry in the new directory, but we can't
3616 * preserve the cached data for the file. It must be re-read
3617 * from the file server. - jaltman, 2009/02/20
3620 /* we only make the local change if we successfully made
3621 the change in the old directory AND there was only one
3622 change in the new directory */
3623 if (diropCode == 0 && cm_CheckDirOpForSingleChange(&newDirOp)) {
3624 cm_DirCreateEntry(&newDirOp, newNamep, &fileFid);
3626 cm_BPlusDirCreateEntry(&newDirOp, cNewNamep, &fileFid);
3631 cm_EndDirOp(&newDirOp);
3635 * After the rename the file server has invalidated the callbacks
3636 * on the file that was moved nor do we have a directory reference
3639 lock_ObtainWrite(&oldScp->rw);
3640 cm_DiscardSCache(oldScp);
3641 lock_ReleaseWrite(&oldScp->rw);
3645 cm_ReleaseSCache(oldScp);
3652 /* and return error code */
3656 /* Byte range locks:
3658 The OpenAFS Windows client has to fake byte range locks given no
3659 server side support for such locks. This is implemented as keyed
3660 byte range locks on the cache manager.
3662 Keyed byte range locks:
3664 Each cm_scache_t structure keeps track of a list of keyed locks.
3665 The key for a lock identifies an owner of a set of locks (referred
3666 to as a client). Each key is represented by a value. The set of
3667 key values used within a specific cm_scache_t structure form a
3668 namespace that has a scope of just that cm_scache_t structure. The
3669 same key value can be used with another cm_scache_t structure and
3670 correspond to a completely different client. However it is
3671 advantageous for the SMB or IFS layer to make sure that there is a
3672 1-1 mapping between client and keys over all cm_scache_t objects.
3674 Assume a client C has key Key(C) (although, since the scope of the
3675 key is a cm_scache_t, the key can be Key(C,S), where S is the
3676 cm_scache_t. But assume a 1-1 relation between keys and clients).
3677 A byte range (O,+L) denotes byte addresses (O) through (O+L-1)
3678 inclusive (a.k.a. [O,O+L-1]). The function Key(x) is implemented
3679 through cm_generateKey() function for both SMB and IFS.
3681 The list of locks for a cm_scache_t object S is maintained in
3682 S->fileLocks. The cache manager will set a lock on the AFS file
3683 server in order to assert the locks in S->fileLocks. If only
3684 shared locks are in place for S, then the cache manager will obtain
3685 a LockRead lock, while if there are any exclusive locks, it will
3686 obtain a LockWrite lock. If the exclusive locks are all released
3687 while the shared locks remain, then the cache manager will
3688 downgrade the lock from LockWrite to LockRead. Similarly, if an
3689 exclusive lock is obtained when only shared locks exist, then the
3690 cache manager will try to upgrade the lock from LockRead to
3693 Each lock L owned by client C maintains a key L->key such that
3694 L->key == Key(C), the effective range defined by L->LOffset and
3695 L->LLength such that the range of bytes affected by the lock is
3696 (L->LOffset, +L->LLength), a type maintained in L->LockType which
3697 is either exclusive or shared.
3701 A lock exists iff it is in S->fileLocks for some cm_scache_t
3702 S. Existing locks are in one of the following states: ACTIVE,
3703 WAITLOCK, WAITUNLOCK, LOST, DELETED.
3705 The following sections describe each lock and the associated
3708 1. ACTIVE: A lock L is ACTIVE iff the cache manager has asserted
3709 the lock with the AFS file server. This type of lock can be
3710 exercised by a client to read or write to the locked region (as
3713 1.1 ACTIVE->LOST: When the AFS file server fails to extend a
3714 server lock that was required to assert the lock. Before
3715 marking the lock as lost, the cache manager checks if the file
3716 has changed on the server. If the file has not changed, then
3717 the cache manager will attempt to obtain a new server lock
3718 that is sufficient to assert the client side locks for the
3719 file. If any of these fail, the lock is marked as LOST.
3720 Otherwise, it is left as ACTIVE.
3722 1.2 ACTIVE->DELETED: Lock is released.
3724 2. WAITLOCK: A lock is in a WAITLOCK state if the cache manager
3725 grants the lock but the lock is yet to be asserted with the AFS
3726 file server. Once the file server grants the lock, the state
3727 will transition to an ACTIVE lock.
3729 2.1 WAITLOCK->ACTIVE: The server granted the lock.
3731 2.2 WAITLOCK->DELETED: Lock is abandoned, or timed out during
3734 2.3 WAITLOCK->LOST: One or more locks from this client were
3735 marked as LOST. No further locks will be granted to this
3736 client until all lost locks are removed.
3738 3. WAITUNLOCK: A lock is in a WAITUNLOCK state if the cache manager
3739 receives a request for a lock that conflicts with an existing
3740 ACTIVE or WAITLOCK lock. The lock will be placed in the queue
3741 and will be granted at such time the conflicting locks are
3742 removed, at which point the state will transition to either
3745 3.1 WAITUNLOCK->ACTIVE: The conflicting lock was removed. The
3746 current serverLock is sufficient to assert this lock, or a
3747 sufficient serverLock is obtained.
3749 3.2 WAITUNLOCK->WAITLOCK: The conflicting lock was removed,
3750 however the required serverLock is yet to be asserted with the
3753 3.3 WAITUNLOCK->DELETED: The lock is abandoned, timed out or
3756 3.5 WAITUNLOCK->LOST: One or more locks from this client were
3757 marked as LOST. No further locks will be granted to this
3758 client until all lost locks are removed.
3760 4. LOST: A lock L is LOST if the server lock that was required to
3761 assert the lock could not be obtained or if it could not be
3762 extended, or if other locks by the same client were LOST.
3763 Essentially, once a lock is LOST, the contract between the cache
3764 manager and that specific client is no longer valid.
3766 The cache manager rechecks the server lock once every minute and
3767 extends it as appropriate. If this is not done for 5 minutes,
3768 the AFS file server will release the lock (the 5 minute timeout
3769 is based on current file server code and is fairly arbitrary).
3770 Once released, the lock cannot be re-obtained without verifying
3771 that the contents of the file hasn't been modified since the
3772 time the lock was released. Re-obtaining the lock without
3773 verifying this may lead to data corruption. If the lock can not
3774 be obtained safely, then all active locks for the cm_scache_t
3777 4.1 LOST->DELETED: The lock is released.
3779 5. DELETED: The lock is no longer relevant. Eventually, it will
3780 get removed from the cm_scache_t. In the meantime, it will be
3781 treated as if it does not exist.
3783 5.1 DELETED->not exist: The lock is removed from the
3786 The following are classifications of locks based on their state.
3788 6* A lock L is ACCEPTED if it is ACTIVE or WAITLOCK. These locks
3789 have been accepted by the cache manager, but may or may not have
3790 been granted back to the client.
3792 7* A lock L is QUEUED if it is ACTIVE, WAITLOCK or WAITUNLOCK.
3794 8* A lock L is WAITING if it is WAITLOCK or WAITUNLOCK.
3798 A client C can READ range (Offset,+Length) of a file represented by
3799 cm_scache_t S iff (1):
3801 1. for all _a_ in (Offset,+Length), all of the following is true:
3803 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
3804 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
3807 1.2 For each LOST lock L in S->fileLocks such that _a_ in
3808 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
3811 (When locks are lost on an cm_scache_t, all locks are lost. By
3812 4.2 (below), if there is an exclusive LOST lock, then there
3813 can't be any overlapping ACTIVE locks.)
3815 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
3817 2. for all _a_ in (Offset,+Length), one of the following is true:
3819 2.1 Byte _a_ of S is unowned (as specified in 1.1) AND there
3820 does not exist a LOST lock L such that _a_ in
3821 (L->LOffset,+L->LLength).
3823 2.2 Byte _a_ of S is owned by C under lock L (as specified in
3824 1.2) AND L->LockType is exclusive.
3826 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
3828 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
3831 3.1 If L->LockType is exclusive then there does NOT exist a
3832 ACCEPTED lock M in S->fileLocks such that _a_ in
3833 (M->LOffset,+M->LLength).
3835 (If we count all QUEUED locks then we hit cases such as
3836 cascading waiting locks where the locks later on in the queue
3837 can be granted without compromising file integrity. On the
3838 other hand if only ACCEPTED locks are considered, then locks
3839 that were received earlier may end up waiting for locks that
3840 were received later to be unlocked. The choice of ACCEPTED
3841 locks was made to mimic the Windows byte range lock
3844 3.2 If L->LockType is shared then for each ACCEPTED lock M in
3845 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
3846 M->LockType is shared.
3848 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
3850 4.1 M->key != Key(C)
3852 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
3853 and (M->LOffset,+M->LLength) do not intersect.
3855 (Note: If a client loses a lock, it loses all locks.
3856 Subsequently, it will not be allowed to obtain any more locks
3857 until all existing LOST locks that belong to the client are
3858 released. Once all locks are released by a single client,
3859 there exists no further contract between the client and AFS
3860 about the contents of the file, hence the client can then
3861 proceed to obtain new locks and establish a new contract.
3863 This doesn't quite work as you think it should, because most
3864 applications aren't built to deal with losing locks they
3865 thought they once had. For now, we don't have a good
3866 solution to lost locks.
3868 Also, for consistency reasons, we have to hold off on
3869 granting locks that overlap exclusive LOST locks.)
3871 A client C can only unlock locks L in S->fileLocks which have
3874 The representation and invariants are as follows:
3876 - Each cm_scache_t structure keeps:
3878 - A queue of byte-range locks (cm_scache_t::fileLocks) which
3879 are of type cm_file_lock_t.
3881 - A record of the highest server-side lock that has been
3882 obtained for this object (cm_scache_t::serverLock), which is
3883 one of (-1), LockRead, LockWrite.
3885 - A count of ACCEPTED exclusive and shared locks that are in the
3886 queue (cm_scache_t::sharedLocks and
3887 cm_scache_t::exclusiveLocks)
3889 - Each cm_file_lock_t structure keeps:
3891 - The type of lock (cm_file_lock_t::LockType)
3893 - The key associated with the lock (cm_file_lock_t::key)
3895 - The offset and length of the lock (cm_file_lock_t::LOffset
3896 and cm_file_lock_t::LLength)
3898 - The state of the lock.
3900 - Time of issuance or last successful extension
3902 Semantic invariants:
3904 I1. The number of ACCEPTED locks in S->fileLocks are
3905 (S->sharedLocks + S->exclusiveLocks)
3907 External invariants:
3909 I3. S->serverLock is the lock that we have asserted with the
3910 AFS file server for this cm_scache_t.
3912 I4. S->serverLock == LockRead iff there is at least one ACTIVE
3913 shared lock, but no ACTIVE exclusive locks.
3915 I5. S->serverLock == LockWrite iff there is at least one ACTIVE
3918 I6. If L is a LOST lock, then for each lock M in S->fileLocks,
3919 M->key == L->key IMPLIES M is LOST or DELETED.
3924 #define IS_LOCK_ACTIVE(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == 0)
3926 #define IS_LOCK_WAITLOCK(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_WAITLOCK)
3928 #define IS_LOCK_WAITUNLOCK(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_WAITUNLOCK)
3930 #define IS_LOCK_LOST(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_LOST)
3932 #define IS_LOCK_DELETED(lockp) (((lockp)->flags & CM_FILELOCK_FLAG_DELETED) == CM_FILELOCK_FLAG_DELETED)
3935 #define IS_LOCK_ACCEPTED(lockp) (IS_LOCK_ACTIVE(lockp) || IS_LOCK_WAITLOCK(lockp))
3938 #define IS_LOCK_CLIENTONLY(lockp) ((((lockp)->scp->flags & CM_SCACHEFLAG_RO) == CM_SCACHEFLAG_RO) || (((lockp)->flags & CM_FILELOCK_FLAG_CLIENTONLY) == CM_FILELOCK_FLAG_CLIENTONLY))
3941 #define INTERSECT_RANGE(r1,r2) (((r2).offset+(r2).length) > (r1).offset && ((r1).offset +(r1).length) > (r2).offset)
3944 #define CONTAINS_RANGE(r1,r2) (((r2).offset+(r2).length) <= ((r1).offset+(r1).length) && (r1).offset <= (r2).offset)
3946 #if defined(VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS) && !defined(LOCK_TESTING)
3947 #define SCP_SUPPORTS_BRLOCKS(scp) ((scp)->cbServerp && ((scp)->cbServerp->capabilities & VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS))
3949 #define SCP_SUPPORTS_BRLOCKS(scp) (1)
3952 #define SERVERLOCKS_ENABLED(scp) (!((scp)->flags & CM_SCACHEFLAG_RO) && cm_enableServerLocks && SCP_SUPPORTS_BRLOCKS(scp))
3954 #if defined(VICED_CAPABILITY_WRITELOCKACL)
3955 #define SCP_SUPPORTS_WRITELOCKACL(scp) ((scp)->cbServerp && ((scp->cbServerp->capabilities & VICED_CAPABILITY_WRITELOCKACL)))
3957 #define SCP_SUPPORTS_WRITELOCKACL(scp) (0)
3959 /* This should really be defined in any build that this code is being
3961 #error VICED_CAPABILITY_WRITELOCKACL not defined.
3964 static void cm_LockRangeSubtract(cm_range_t * pos, const cm_range_t * neg)
3966 afs_int64 int_begin;
3969 int_begin = MAX(pos->offset, neg->offset);
3970 int_end = MIN(pos->offset+pos->length, neg->offset+neg->length);
3972 if (int_begin < int_end) {
3973 if (int_begin == pos->offset) {
3974 pos->length = pos->offset + pos->length - int_end;
3975 pos->offset = int_end;
3976 } else if (int_end == pos->offset + pos->length) {
3977 pos->length = int_begin - pos->offset;
3980 /* We only subtract ranges if the resulting range is
3981 contiguous. If we try to support non-contigous ranges, we
3982 aren't actually improving performance. */
3986 /* Called with scp->rw held. Returns 0 if all is clear to read the
3987 specified range by the client identified by key.
3989 long cm_LockCheckRead(cm_scache_t *scp,
3990 LARGE_INTEGER LOffset,
3991 LARGE_INTEGER LLength,
3994 #ifndef ADVISORY_LOCKS
3996 cm_file_lock_t *fileLock;
4000 int substract_ranges = FALSE;
4002 range.offset = LOffset.QuadPart;
4003 range.length = LLength.QuadPart;
4007 1. for all _a_ in (Offset,+Length), all of the following is true:
4009 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4010 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4013 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4014 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4019 lock_ObtainRead(&cm_scacheLock);
4021 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4023 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4025 if (INTERSECT_RANGE(range, fileLock->range)) {
4026 if (IS_LOCK_ACTIVE(fileLock)) {
4027 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4029 /* If there is an active lock for this client, it
4030 is safe to substract ranges.*/
4031 cm_LockRangeSubtract(&range, &fileLock->range);
4032 substract_ranges = TRUE;
4034 if (fileLock->lockType != LockRead) {
4035 code = CM_ERROR_LOCK_CONFLICT;
4039 /* even if the entire range is locked for reading,
4040 we still can't grant the lock at this point
4041 because the client may have lost locks. That
4042 is, unless we have already seen an active lock
4043 belonging to the client, in which case there
4044 can't be any lost locks for this client. */
4045 if (substract_ranges)
4046 cm_LockRangeSubtract(&range, &fileLock->range);
4048 } else if (IS_LOCK_LOST(fileLock) &&
4049 (cm_KeyEquals(&fileLock->key, &key, 0) || fileLock->lockType == LockWrite)) {
4050 code = CM_ERROR_BADFD;
4056 lock_ReleaseRead(&cm_scacheLock);
4058 osi_Log4(afsd_logp, "cm_LockCheckRead scp 0x%x offset %d length %d code 0x%x",
4059 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4070 /* Called with scp->rw held. Returns 0 if all is clear to write the
4071 specified range by the client identified by key.
4073 long cm_LockCheckWrite(cm_scache_t *scp,
4074 LARGE_INTEGER LOffset,
4075 LARGE_INTEGER LLength,
4078 #ifndef ADVISORY_LOCKS
4080 cm_file_lock_t *fileLock;
4085 range.offset = LOffset.QuadPart;
4086 range.length = LLength.QuadPart;
4089 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4091 2. for all _a_ in (Offset,+Length), one of the following is true:
4093 2.1 Byte _a_ of S is unowned AND there does not exist a LOST
4094 lock L such that _a_ in (L->LOffset,+L->LLength).
4096 2.2 Byte _a_ of S is owned by C under lock L AND L->LockType is
4100 lock_ObtainRead(&cm_scacheLock);
4102 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4104 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4106 if (INTERSECT_RANGE(range, fileLock->range)) {
4107 if (IS_LOCK_ACTIVE(fileLock)) {
4108 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4109 if (fileLock->lockType == LockWrite) {
4111 /* if there is an active lock for this client, it
4112 is safe to substract ranges */
4113 cm_LockRangeSubtract(&range, &fileLock->range);
4115 code = CM_ERROR_LOCK_CONFLICT;
4119 code = CM_ERROR_LOCK_CONFLICT;
4122 } else if (IS_LOCK_LOST(fileLock)) {
4123 code = CM_ERROR_BADFD;
4129 lock_ReleaseRead(&cm_scacheLock);
4131 osi_Log4(afsd_logp, "cm_LockCheckWrite scp 0x%x offset %d length %d code 0x%x",
4132 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4143 /* Called with cm_scacheLock write locked */
4144 static cm_file_lock_t * cm_GetFileLock(void) {
4147 l = (cm_file_lock_t *) cm_freeFileLocks;
4149 osi_QRemove(&cm_freeFileLocks, &l->q);
4151 l = malloc(sizeof(cm_file_lock_t));
4152 osi_assertx(l, "null cm_file_lock_t");
4155 memset(l, 0, sizeof(cm_file_lock_t));
4160 /* Called with cm_scacheLock write locked */
4161 static void cm_PutFileLock(cm_file_lock_t *l) {
4162 osi_QAdd(&cm_freeFileLocks, &l->q);
4165 /* called with scp->rw held. May release it during processing, but
4166 leaves it held on exit. */
4167 long cm_IntSetLock(cm_scache_t * scp, cm_user_t * userp, int lockType,
4173 struct rx_connection * rxconnp;
4175 afs_uint32 reqflags = reqp->flags;
4177 tfid.Volume = scp->fid.volume;
4178 tfid.Vnode = scp->fid.vnode;
4179 tfid.Unique = scp->fid.unique;
4182 osi_Log2(afsd_logp, "CALL SetLock scp 0x%p for lock %d", scp, lockType);
4184 reqp->flags |= CM_REQ_NORETRY;
4185 lock_ReleaseWrite(&scp->rw);
4188 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4192 rxconnp = cm_GetRxConn(connp);
4193 code = RXAFS_SetLock(rxconnp, &tfid, lockType,
4195 rx_PutConnection(rxconnp);
4197 } while (cm_Analyze(connp, userp, reqp, &cfid, &volSync,
4200 code = cm_MapRPCError(code, reqp);
4202 osi_Log1(afsd_logp, "CALL SetLock FAILURE, code 0x%x", code);
4204 osi_Log0(afsd_logp, "CALL SetLock SUCCESS");
4207 lock_ObtainWrite(&scp->rw);
4208 reqp->flags = reqflags;
4212 /* called with scp->rw held. Releases it during processing */
4213 long cm_IntReleaseLock(cm_scache_t * scp, cm_user_t * userp,
4219 struct rx_connection * rxconnp;
4222 tfid.Volume = scp->fid.volume;
4223 tfid.Vnode = scp->fid.vnode;
4224 tfid.Unique = scp->fid.unique;
4227 lock_ReleaseWrite(&scp->rw);
4229 osi_Log1(afsd_logp, "CALL ReleaseLock scp 0x%p", scp);
4232 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4236 rxconnp = cm_GetRxConn(connp);
4237 code = RXAFS_ReleaseLock(rxconnp, &tfid, &volSync);
4238 rx_PutConnection(rxconnp);
4240 } while (cm_Analyze(connp, userp, reqp, &cfid, &volSync,
4242 code = cm_MapRPCError(code, reqp);
4245 "CALL ReleaseLock FAILURE, code 0x%x", code);
4248 "CALL ReleaseLock SUCCESS");
4250 lock_ObtainWrite(&scp->rw);
4255 /* called with scp->rw held. May release it during processing, but
4256 will exit with lock held.
4260 - 0 if the user has permission to get the specified lock for the scp
4262 - CM_ERROR_NOACCESS if not
4264 Any other error from cm_SyncOp will be sent down untranslated.
4266 If CM_ERROR_NOACCESS is returned and lock_type is LockRead, then
4267 phas_insert (if non-NULL) will receive a boolean value indicating
4268 whether the user has INSERT permission or not.
4270 long cm_LockCheckPerms(cm_scache_t * scp,
4277 long code = 0, code2 = 0;
4279 /* lock permissions are slightly tricky because of the 'i' bit.
4280 If the user has PRSFS_LOCK, she can read-lock the file. If the
4281 user has PRSFS_WRITE, she can write-lock the file. However, if
4282 the user has PRSFS_INSERT, then she can write-lock new files,
4283 but not old ones. Since we don't have information about
4284 whether a file is new or not, we assume that if the user owns
4285 the scp, then she has the permissions that are granted by
4288 osi_Log3(afsd_logp, "cm_LockCheckPerms for scp[0x%p] type[%d] user[0x%p]",
4289 scp, lock_type, userp);
4291 if (lock_type == LockRead)
4292 rights |= PRSFS_LOCK;
4293 else if (lock_type == LockWrite)
4294 rights |= PRSFS_WRITE | PRSFS_LOCK;
4297 osi_assertx(FALSE, "invalid lock type");
4302 *phas_insert = FALSE;
4304 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
4305 CM_SCACHESYNC_GETSTATUS |
4306 CM_SCACHESYNC_NEEDCALLBACK);
4308 if (phas_insert && scp->creator == userp) {
4310 /* If this file was created by the user, then we check for
4311 PRSFS_INSERT. If the file server is recent enough, then
4312 this should be sufficient for her to get a write-lock (but
4313 not necessarily a read-lock). VICED_CAPABILITY_WRITELOCKACL
4314 indicates whether a file server supports getting write
4315 locks when the user only has PRSFS_INSERT.
4317 If the file was not created by the user we skip the check
4318 because the INSERT bit will not apply to this user even
4322 code2 = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
4323 CM_SCACHESYNC_GETSTATUS |
4324 CM_SCACHESYNC_NEEDCALLBACK);
4326 if (code2 == CM_ERROR_NOACCESS) {
4327 osi_Log0(afsd_logp, "cm_LockCheckPerms user has no INSERT bits");
4329 *phas_insert = TRUE;
4330 osi_Log0(afsd_logp, "cm_LockCheckPerms user has INSERT bits");
4334 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
4336 osi_Log1(afsd_logp, "cm_LockCheckPerms returning code %d", code);
4341 /* called with scp->rw held */
4342 long cm_Lock(cm_scache_t *scp, unsigned char sLockType,
4343 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
4345 int allowWait, cm_user_t *userp, cm_req_t *reqp,
4346 cm_file_lock_t **lockpp)
4349 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
4350 cm_file_lock_t *fileLock;
4353 int wait_unlock = FALSE;
4354 int force_client_lock = FALSE;
4356 osi_Log4(afsd_logp, "cm_Lock scp 0x%x type 0x%x offset %d length %d",
4357 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
4358 osi_Log4(afsd_logp, "... allowWait %d key <0x%x, 0x%x, 0x%x>", allowWait,
4359 key.process_id, key.session_id, key.file_id);
4362 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4364 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4367 3.1 If L->LockType is exclusive then there does NOT exist a
4368 ACCEPTED lock M in S->fileLocks such that _a_ in
4369 (M->LOffset,+M->LLength).
4371 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4372 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4373 M->LockType is shared.
4375 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4377 4.1 M->key != Key(C)
4379 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4380 and (M->LOffset,+M->LLength) do not intersect.
4383 range.offset = LOffset.QuadPart;
4384 range.length = LLength.QuadPart;
4386 lock_ObtainRead(&cm_scacheLock);
4388 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
4390 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4392 if (IS_LOCK_LOST(fileLock)) {
4393 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4394 code = CM_ERROR_BADFD;
4396 } else if (fileLock->lockType == LockWrite && INTERSECT_RANGE(range, fileLock->range)) {
4397 code = CM_ERROR_WOULDBLOCK;
4403 /* we don't need to check for deleted locks here since deleted
4404 locks are dequeued from scp->fileLocks */
4405 if (IS_LOCK_ACCEPTED(fileLock) &&
4406 INTERSECT_RANGE(range, fileLock->range)) {
4408 if ((sLockType & LOCKING_ANDX_SHARED_LOCK) == 0 ||
4409 fileLock->lockType != LockRead) {
4411 code = CM_ERROR_WOULDBLOCK;
4417 lock_ReleaseRead(&cm_scacheLock);
4419 if (code == 0 && SERVERLOCKS_ENABLED(scp)) {
4420 if (Which == scp->serverLock ||
4421 (Which == LockRead && scp->serverLock == LockWrite)) {
4425 /* we already have the lock we need */
4426 osi_Log3(afsd_logp, " we already have the correct lock. exclusives[%d], shared[%d], serverLock[%d]",
4427 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
4429 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4431 /* special case: if we don't have permission to read-lock
4432 the file, then we force a clientside lock. This is to
4433 compensate for applications that obtain a read-lock for
4434 reading files off of directories that don't grant
4435 read-locks to the user. */
4436 if (code == CM_ERROR_NOACCESS && Which == LockRead) {
4438 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4439 osi_Log0(afsd_logp, " User has no read-lock perms, but has INSERT perms.");
4442 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4443 force_client_lock = TRUE;
4447 } else if ((scp->exclusiveLocks > 0) ||
4448 (scp->sharedLocks > 0 && scp->serverLock != LockRead)) {
4451 /* We are already waiting for some other lock. We should
4452 wait for the daemon to catch up instead of generating a
4453 flood of SetLock calls. */
4454 osi_Log3(afsd_logp, " already waiting for other lock. exclusives[%d], shared[%d], serverLock[%d]",
4455 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
4457 /* see if we have permission to create the lock in the
4459 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4461 code = CM_ERROR_WOULDBLOCK;
4462 else if (code == CM_ERROR_NOACCESS && Which == LockRead) {
4464 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4466 " User has no read-lock perms, but has INSERT perms.");
4467 code = CM_ERROR_WOULDBLOCK;
4470 " User has no read-lock perms. Forcing client-side lock");
4471 force_client_lock = TRUE;
4475 /* leave any other codes as-is */
4479 int check_data_version = FALSE;
4482 /* first check if we have permission to elevate or obtain
4484 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4486 if (code == CM_ERROR_NOACCESS && Which == LockRead &&
4487 (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp))) {
4488 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4489 force_client_lock = TRUE;
4494 /* has_insert => (Which == LockRead, code == CM_ERROR_NOACCESS) */
4496 if (scp->serverLock == LockRead && Which == LockWrite) {
4498 /* We want to escalate the lock to a LockWrite.
4499 * Unfortunately that's not really possible without
4500 * letting go of the current lock. But for now we do
4504 " attempting to UPGRADE from LockRead to LockWrite.");
4506 " dataVersion on scp: %I64d", scp->dataVersion);
4508 /* we assume at this point (because scp->serverLock
4509 was valid) that we had a valid server lock. */
4510 scp->lockDataVersion = scp->dataVersion;
4511 check_data_version = TRUE;
4513 code = cm_IntReleaseLock(scp, userp, reqp);
4516 /* We couldn't release the lock */
4519 scp->serverLock = -1;
4523 /* We need to obtain a server lock of type Which in order
4524 * to assert this file lock */
4525 #ifndef AGGRESSIVE_LOCKS
4528 newLock = LockWrite;
4531 code = cm_IntSetLock(scp, userp, newLock, reqp);
4533 #ifdef AGGRESSIVE_LOCKS
4534 if ((code == CM_ERROR_WOULDBLOCK ||
4535 code == CM_ERROR_NOACCESS) && newLock != Which) {
4536 /* we wanted LockRead. We tried LockWrite. Now try
4541 osi_assertx(newLock == LockRead, "lock type not read");
4543 code = cm_IntSetLock(scp, userp, newLock, reqp);
4547 if (code == CM_ERROR_NOACCESS) {
4548 if (Which == LockRead) {
4549 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4551 /* We requested a read-lock, but we have permission to
4552 * get a write-lock. Try that */
4554 tcode = cm_LockCheckPerms(scp, LockWrite, userp, reqp, NULL);
4557 newLock = LockWrite;
4559 osi_Log0(afsd_logp, " User has 'i' perms and the request was for a LockRead. Trying to get a LockWrite instead");
4561 code = cm_IntSetLock(scp, userp, newLock, reqp);
4564 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4565 force_client_lock = TRUE;
4567 } else if (Which == LockWrite &&
4568 scp->creator == userp && !SCP_SUPPORTS_WRITELOCKACL(scp)) {
4571 /* Special case: if the lock request was for a
4572 * LockWrite and the user owns the file and we weren't
4573 * allowed to obtain the serverlock, we either lost a
4574 * race (the permissions changed from under us), or we
4575 * have 'i' bits, but we aren't allowed to lock the
4578 /* check if we lost a race... */
4579 tcode = cm_LockCheckPerms(scp, Which, userp, reqp, NULL);
4582 osi_Log0(afsd_logp, " User has 'i' perms but can't obtain write locks. Using client-side locks.");
4583 force_client_lock = TRUE;
4588 if (code == 0 && check_data_version &&
4589 scp->dataVersion != scp->lockDataVersion) {
4590 /* We lost a race. Although we successfully obtained
4591 * a lock, someone modified the file in between. The
4592 * locks have all been technically lost. */
4595 " Data version mismatch while upgrading lock.");
4597 " Data versions before=%I64d, after=%I64d",
4598 scp->lockDataVersion,
4601 " Releasing stale lock for scp 0x%x", scp);
4603 code = cm_IntReleaseLock(scp, userp, reqp);
4605 scp->serverLock = -1;
4607 code = CM_ERROR_INVAL;
4608 } else if (code == 0) {
4609 scp->serverLock = newLock;
4610 scp->lockDataVersion = scp->dataVersion;
4614 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
4615 scp->serverLock == -1) {
4616 /* Oops. We lost the lock. */
4617 cm_LockMarkSCacheLost(scp);
4620 } else if (code == 0) { /* server locks not enabled */
4622 " Skipping server lock for scp");
4627 if (code != 0 && !force_client_lock) {
4628 /* Special case error translations
4630 Applications don't expect certain errors from a
4631 LockFile/UnlockFile call. We need to translate some error
4632 code to codes that apps expect and handle. */
4634 /* We shouldn't actually need to handle this case since we
4635 simulate locks for RO scps anyway. */
4636 if (code == CM_ERROR_READONLY) {
4637 osi_Log0(afsd_logp, " Reinterpreting CM_ERROR_READONLY as CM_ERROR_NOACCESS");
4638 code = CM_ERROR_NOACCESS;
4642 if (code == 0 || (code == CM_ERROR_WOULDBLOCK && allowWait) ||
4643 force_client_lock) {
4645 /* clear the error if we are forcing a client lock, so we
4646 don't get confused later. */
4647 if (force_client_lock && code != CM_ERROR_WOULDBLOCK)
4650 lock_ObtainWrite(&cm_scacheLock);
4651 fileLock = cm_GetFileLock();
4652 lock_ReleaseWrite(&cm_scacheLock);
4654 fileLock->fid = scp->fid;
4656 fileLock->key = key;
4657 fileLock->lockType = Which;
4659 fileLock->userp = userp;
4660 fileLock->range = range;
4661 fileLock->flags = (code == 0 ? 0 :
4663 CM_FILELOCK_FLAG_WAITUNLOCK :
4664 CM_FILELOCK_FLAG_WAITLOCK));
4666 if (force_client_lock || !SERVERLOCKS_ENABLED(scp))
4667 fileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
4669 fileLock->lastUpdate = (code == 0 && !force_client_lock) ? time(NULL) : 0;
4671 lock_ObtainWrite(&cm_scacheLock);
4672 osi_QAddT(&scp->fileLocksH, &scp->fileLocksT, &fileLock->fileq);
4673 cm_HoldSCacheNoLock(scp);
4674 fileLock->scp = scp;
4675 osi_QAdd(&cm_allFileLocks, &fileLock->q);
4676 lock_ReleaseWrite(&cm_scacheLock);
4682 if (IS_LOCK_CLIENTONLY(fileLock)) {
4684 } else if (IS_LOCK_ACCEPTED(fileLock)) {
4685 if (Which == LockRead)
4688 scp->exclusiveLocks++;
4692 "cm_Lock Lock added 0x%p flags 0x%x to scp [0x%p]",
4693 fileLock, fileLock->flags, scp);
4695 " exclusives[%d] shared[%d] client[%d] serverLock[%d]",
4696 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
4697 (int)(signed char) scp->serverLock);
4700 "cm_Lock Rejecting lock (code = 0x%x)", code);
4706 /* Called with scp->rw held */
4707 long cm_UnlockByKey(cm_scache_t * scp,
4714 cm_file_lock_t *fileLock;
4715 osi_queue_t *q, *qn;
4718 osi_Log4(afsd_logp, "cm_UnlockByKey scp 0x%p key <0x%x,0x%x,0x%x",
4719 scp, key.process_id, key.session_id, key.file_id);
4720 osi_Log1(afsd_logp, " flags=0x%x", flags);
4722 lock_ObtainWrite(&cm_scacheLock);
4724 for (q = scp->fileLocksH; q; q = qn) {
4727 fileLock = (cm_file_lock_t *)
4728 ((char *) q - offsetof(cm_file_lock_t, fileq));
4731 osi_Log4(afsd_logp, " Checking lock[0x%x] range[%d,+%d] type[%d]",
4733 (unsigned long) fileLock->range.offset,
4734 (unsigned long) fileLock->range.length,
4735 fileLock->lockType);
4736 osi_Log4(afsd_logp, " key<0x%x, 0x%x, 0x%x> flags[0x%x]",
4737 fileLock->key.process_id, fileLock->key.session_id, fileLock->key.file_id,
4740 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
4741 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
4742 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
4744 fileLock->fid.volume,
4745 fileLock->fid.vnode,
4746 fileLock->fid.unique);
4747 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
4748 fileLock->scp->fid.cell,
4749 fileLock->scp->fid.volume,
4750 fileLock->scp->fid.vnode,
4751 fileLock->scp->fid.unique);
4752 osi_assertx(FALSE, "invalid fid value");
4756 if (!IS_LOCK_DELETED(fileLock) &&
4757 cm_KeyEquals(&fileLock->key, &key, flags)) {
4758 osi_Log3(afsd_logp, "...Unlock range [%d,+%d] type %d",
4759 fileLock->range.offset,
4760 fileLock->range.length,
4761 fileLock->lockType);
4763 if (scp->fileLocksT == q)
4764 scp->fileLocksT = osi_QPrev(q);
4765 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
4767 if (IS_LOCK_CLIENTONLY(fileLock)) {
4769 } else if (IS_LOCK_ACCEPTED(fileLock)) {
4770 if (fileLock->lockType == LockRead)
4773 scp->exclusiveLocks--;
4776 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
4778 cm_ReleaseUser(fileLock->userp);
4779 cm_ReleaseSCacheNoLock(scp);
4781 fileLock->userp = NULL;
4782 fileLock->scp = NULL;
4788 lock_ReleaseWrite(&cm_scacheLock);
4790 if (n_unlocks == 0) {
4791 osi_Log0(afsd_logp, "cm_UnlockByKey no locks found");
4792 osi_Log3(afsd_logp, " Leaving scp with exclusives[%d], shared[%d], serverLock[%d]",
4793 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
4798 osi_Log1(afsd_logp, "cm_UnlockByKey done with %d locks", n_unlocks);
4800 osi_assertx(scp->sharedLocks >= 0, "scp->sharedLocks < 0");
4801 osi_assertx(scp->exclusiveLocks >= 0, "scp->exclusiveLocks < 0");
4802 osi_assertx(scp->clientLocks >= 0, "scp->clientLocks < 0");
4804 if (!SERVERLOCKS_ENABLED(scp)) {
4805 osi_Log0(afsd_logp, " Skipping server lock for scp");
4809 /* Ideally we would go through the rest of the locks to determine
4810 * if one or more locks that were formerly in WAITUNLOCK can now
4811 * be put to ACTIVE or WAITLOCK and update scp->exclusiveLocks and
4812 * scp->sharedLocks accordingly. However, the retrying of locks
4813 * in that manner is done cm_RetryLock() manually.
4816 if (scp->serverLock == LockWrite &&
4817 scp->exclusiveLocks == 0 &&
4818 scp->sharedLocks > 0) {
4820 /* The serverLock should be downgraded to LockRead */
4821 osi_Log0(afsd_logp, " DOWNGRADE lock from LockWrite to LockRead");
4823 /* since scp->serverLock looked sane, we are going to assume
4824 that we have a valid server lock. */
4825 scp->lockDataVersion = scp->dataVersion;
4826 osi_Log1(afsd_logp, " dataVersion on scp = %I64d", scp->dataVersion);
4828 code = cm_IntReleaseLock(scp, userp, reqp);
4831 /* so we couldn't release it. Just let the lock be for now */
4835 scp->serverLock = -1;
4838 code = cm_IntSetLock(scp, userp, LockRead, reqp);
4840 if (code == 0 && scp->lockDataVersion == scp->dataVersion) {
4841 scp->serverLock = LockRead;
4842 } else if (code == 0 && scp->lockDataVersion != scp->dataVersion) {
4843 /* We lost a race condition. Although we have a valid
4844 lock on the file, the data has changed and essentially
4845 we have lost the lock we had during the transition. */
4847 osi_Log0(afsd_logp, "Data version mismatch during lock downgrade");
4848 osi_Log2(afsd_logp, " Data versions before=%I64d, after=%I64d",
4849 scp->lockDataVersion,
4852 code = cm_IntReleaseLock(scp, userp, reqp);
4854 code = CM_ERROR_INVAL;
4855 scp->serverLock = -1;
4859 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
4860 (scp->serverLock == -1)) {
4862 cm_LockMarkSCacheLost(scp);
4865 /* failure here has no bearing on the return value of
4869 } else if (scp->serverLock != (-1) &&
4870 scp->exclusiveLocks == 0 &&
4871 scp->sharedLocks == 0) {
4872 /* The serverLock should be released entirely */
4874 code = cm_IntReleaseLock(scp, userp, reqp);
4877 scp->serverLock = (-1);
4882 osi_Log1(afsd_logp, "cm_UnlockByKey code 0x%x", code);
4883 osi_Log4(afsd_logp, " Leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
4884 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
4885 (int)(signed char) scp->serverLock);
4890 long cm_Unlock(cm_scache_t *scp,
4891 unsigned char sLockType,
4892 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
4899 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
4900 cm_file_lock_t *fileLock;
4902 int release_userp = FALSE;
4903 int exact_match = !(flags & CM_UNLOCK_FLAG_MATCH_RANGE);
4905 LARGE_INTEGER RangeEnd;
4907 osi_Log4(afsd_logp, "cm_Unlock scp 0x%p type 0x%x offset %d length %d",
4908 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
4909 osi_Log4(afsd_logp, "... key <0x%x,0x%x,0x%x> flags 0x%x",
4910 key.process_id, key.session_id, key.file_id, flags);
4913 RangeEnd.QuadPart = LOffset.QuadPart + LLength.QuadPart;
4916 lock_ObtainRead(&cm_scacheLock);
4918 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
4919 fileLock = (cm_file_lock_t *)
4920 ((char *) q - offsetof(cm_file_lock_t, fileq));
4923 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
4924 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
4925 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
4927 fileLock->fid.volume,
4928 fileLock->fid.vnode,
4929 fileLock->fid.unique);
4930 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
4931 fileLock->scp->fid.cell,
4932 fileLock->scp->fid.volume,
4933 fileLock->scp->fid.vnode,
4934 fileLock->scp->fid.unique);
4935 osi_assertx(FALSE, "invalid fid value");
4939 if (!IS_LOCK_DELETED(fileLock) &&
4940 cm_KeyEquals(&fileLock->key, &key, 0) &&
4941 fileLock->range.offset == LOffset.QuadPart &&
4942 fileLock->range.length == LLength.QuadPart) {
4948 if (!IS_LOCK_DELETED(fileLock) &&
4949 cm_KeyEquals(&fileLock->key, &key, 0) &&
4950 fileLock->range.offset >= LOffset.QuadPart &&
4951 fileLock->range.offset < RangeEnd.QuadPart &&
4952 (fileLock->range.offset + fileLock->range.length) <= RangeEnd.QuadPart) {
4960 lock_ReleaseRead(&cm_scacheLock);
4962 if (lock_found && !exact_match) {
4966 osi_Log0(afsd_logp, "cm_Unlock lock not found; failure");
4968 /* The lock didn't exist anyway. *shrug* */
4969 return CM_ERROR_RANGE_NOT_LOCKED;
4973 /* discard lock record */
4974 lock_ConvertRToW(&cm_scacheLock);
4975 if (scp->fileLocksT == q)
4976 scp->fileLocksT = osi_QPrev(q);
4977 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
4980 * Don't delete it here; let the daemon delete it, to simplify
4981 * the daemon's traversal of the list.
4984 if (IS_LOCK_CLIENTONLY(fileLock)) {
4986 } else if (IS_LOCK_ACCEPTED(fileLock)) {
4987 if (fileLock->lockType == LockRead)
4990 scp->exclusiveLocks--;
4993 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
4994 if (userp != NULL) {
4995 cm_ReleaseUser(fileLock->userp);
4997 userp = fileLock->userp;
4998 release_userp = TRUE;
5000 fileLock->userp = NULL;
5001 cm_ReleaseSCacheNoLock(scp);
5002 fileLock->scp = NULL;
5003 lock_ReleaseWrite(&cm_scacheLock);
5005 if (!SERVERLOCKS_ENABLED(scp)) {
5006 osi_Log0(afsd_logp, " Skipping server locks for scp");
5010 /* Ideally we would go through the rest of the locks to determine
5011 * if one or more locks that were formerly in WAITUNLOCK can now
5012 * be put to ACTIVE or WAITLOCK and update scp->exclusiveLocks and
5013 * scp->sharedLocks accordingly. However, the retrying of locks
5014 * in that manner is done cm_RetryLock() manually.
5017 if (scp->serverLock == LockWrite &&
5018 scp->exclusiveLocks == 0 &&
5019 scp->sharedLocks > 0) {
5021 /* The serverLock should be downgraded to LockRead */
5022 osi_Log0(afsd_logp, " DOWNGRADE lock from LockWrite to LockRead");
5024 /* Since we already had a lock, we assume that there is a
5025 valid server lock. */
5026 scp->lockDataVersion = scp->dataVersion;
5027 osi_Log1(afsd_logp, " dataVersion on scp is %I64d", scp->dataVersion);
5029 /* before we downgrade, make sure that we have enough
5030 permissions to get the read lock. */
5031 code = cm_LockCheckPerms(scp, LockRead, userp, reqp, NULL);
5034 osi_Log0(afsd_logp, " SKIPPING downgrade because user doesn't have perms to get downgraded lock");
5040 code = cm_IntReleaseLock(scp, userp, reqp);
5043 /* so we couldn't release it. Just let the lock be for now */
5047 scp->serverLock = -1;
5050 code = cm_IntSetLock(scp, userp, LockRead, reqp);
5052 if (code == 0 && scp->lockDataVersion == scp->dataVersion) {
5053 scp->serverLock = LockRead;
5054 } else if (code == 0 && scp->lockDataVersion != scp->dataVersion) {
5055 /* Lost a race. We obtained a new lock, but that is
5056 meaningless since someone modified the file
5060 "Data version mismatch while downgrading lock");
5062 " Data versions before=%I64d, after=%I64d",
5063 scp->lockDataVersion,
5066 code = cm_IntReleaseLock(scp, userp, reqp);
5068 scp->serverLock = -1;
5069 code = CM_ERROR_INVAL;
5073 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5074 (scp->serverLock == -1)) {
5076 cm_LockMarkSCacheLost(scp);
5079 /* failure here has no bearing on the return value of
5083 } else if (scp->serverLock != (-1) &&
5084 scp->exclusiveLocks == 0 &&
5085 scp->sharedLocks == 0) {
5086 /* The serverLock should be released entirely */
5088 code = cm_IntReleaseLock(scp, userp, reqp);
5091 scp->serverLock = (-1);
5095 if (release_userp) {
5096 cm_ReleaseUser(userp);
5097 release_userp = FALSE;
5101 goto try_again; /* might be more than one lock in the range */
5105 osi_Log1(afsd_logp, "cm_Unlock code 0x%x", code);
5106 osi_Log4(afsd_logp, " leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5107 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5108 (int)(signed char) scp->serverLock);
5113 /* called with scp->rw held */
5114 void cm_LockMarkSCacheLost(cm_scache_t * scp)
5116 cm_file_lock_t *fileLock;
5119 osi_Log1(afsd_logp, "cm_LockMarkSCacheLost scp 0x%x", scp);
5121 /* cm_scacheLock needed because we are modifying fileLock->flags */
5122 lock_ObtainWrite(&cm_scacheLock);
5124 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5126 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
5128 if (IS_LOCK_ACTIVE(fileLock) &&
5129 !IS_LOCK_CLIENTONLY(fileLock)) {
5130 if (fileLock->lockType == LockRead)
5133 scp->exclusiveLocks--;
5135 fileLock->flags |= CM_FILELOCK_FLAG_LOST;
5139 scp->serverLock = -1;
5140 scp->lockDataVersion = CM_SCACHE_VERSION_BAD;
5141 lock_ReleaseWrite(&cm_scacheLock);
5144 /* Called with no relevant locks held */
5145 void cm_CheckLocks()
5147 osi_queue_t *q, *nq;
5148 cm_file_lock_t *fileLock;
5154 struct rx_connection * rxconnp;
5159 lock_ObtainWrite(&cm_scacheLock);
5161 cm_lockRefreshCycle++;
5163 osi_Log1(afsd_logp, "cm_CheckLocks starting lock check cycle %d", cm_lockRefreshCycle);
5165 for (q = cm_allFileLocks; q; q = nq) {
5166 fileLock = (cm_file_lock_t *) q;
5170 if (IS_LOCK_DELETED(fileLock)) {
5172 osi_QRemove(&cm_allFileLocks, q);
5173 cm_PutFileLock(fileLock);
5175 } else if (IS_LOCK_ACTIVE(fileLock) && !IS_LOCK_CLIENTONLY(fileLock)) {
5177 /* Server locks must have been enabled for us to have
5178 received an active non-client-only lock. */
5179 osi_assertx(cm_enableServerLocks, "!cm_enableServerLocks");
5181 scp = fileLock->scp;
5182 osi_assertx(scp != NULL, "null cm_scache_t");
5184 cm_HoldSCacheNoLock(scp);
5187 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5188 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5189 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5191 fileLock->fid.volume,
5192 fileLock->fid.vnode,
5193 fileLock->fid.unique);
5194 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5195 fileLock->scp->fid.cell,
5196 fileLock->scp->fid.volume,
5197 fileLock->scp->fid.vnode,
5198 fileLock->scp->fid.unique);
5199 osi_assertx(FALSE, "invalid fid");
5202 /* Server locks are extended once per scp per refresh
5204 if (scp->lastRefreshCycle != cm_lockRefreshCycle) {
5206 int scp_done = FALSE;
5208 osi_Log1(afsd_logp, "cm_CheckLocks Updating scp 0x%x", scp);
5210 lock_ReleaseWrite(&cm_scacheLock);
5211 lock_ObtainWrite(&scp->rw);
5213 /* did the lock change while we weren't holding the lock? */
5214 if (!IS_LOCK_ACTIVE(fileLock))
5215 goto post_syncopdone;
5217 code = cm_SyncOp(scp, NULL, fileLock->userp, &req, 0,
5218 CM_SCACHESYNC_NEEDCALLBACK
5219 | CM_SCACHESYNC_GETSTATUS
5220 | CM_SCACHESYNC_LOCK);
5224 "cm_CheckLocks SyncOp failure code 0x%x", code);
5225 goto post_syncopdone;
5228 /* cm_SyncOp releases scp->rw during which the lock
5229 may get released. */
5230 if (!IS_LOCK_ACTIVE(fileLock))
5231 goto pre_syncopdone;
5233 if (scp->serverLock != -1 && !(scp->flags & CM_SCACHEFLAG_DELETED)) {
5237 tfid.Volume = scp->fid.volume;
5238 tfid.Vnode = scp->fid.vnode;
5239 tfid.Unique = scp->fid.unique;
5241 userp = fileLock->userp;
5243 osi_Log3(afsd_logp, "CALL ExtendLock lock 0x%p for scp=0x%p with lock %d",
5246 (int) scp->serverLock);
5248 lock_ReleaseWrite(&scp->rw);
5251 code = cm_ConnFromFID(&cfid, userp,
5256 rxconnp = cm_GetRxConn(connp);
5257 code = RXAFS_ExtendLock(rxconnp, &tfid,
5259 rx_PutConnection(rxconnp);
5261 osi_Log1(afsd_logp, " ExtendLock returns %d", code);
5263 } while (cm_Analyze(connp, userp, &req,
5264 &cfid, &volSync, NULL, NULL,
5267 code = cm_MapRPCError(code, &req);
5269 lock_ObtainWrite(&scp->rw);
5272 osi_Log1(afsd_logp, "CALL ExtendLock FAILURE, code 0x%x", code);
5274 osi_Log0(afsd_logp, "CALL ExtendLock SUCCESS");
5275 scp->lockDataVersion = scp->dataVersion;
5278 if ((code == EINVAL || code == CM_ERROR_INVAL) &&
5279 scp->lockDataVersion == scp->dataVersion) {
5283 (scp->exclusiveLocks > 0) ? LockWrite: LockRead;
5285 /* we might still have a chance to obtain a
5288 code = cm_IntSetLock(scp, userp, lockType, &req);
5291 code = CM_ERROR_INVAL;
5292 } else if (scp->lockDataVersion != scp->dataVersion) {
5294 /* now check if we still have the file at
5295 the right data version. */
5297 "Data version mismatch on scp 0x%p",
5300 " Data versions: before=%I64d, after=%I64d",
5301 scp->lockDataVersion,
5304 code = cm_IntReleaseLock(scp, userp, &req);
5306 code = CM_ERROR_INVAL;
5310 if (code == EINVAL || code == CM_ERROR_INVAL ||
5311 code == CM_ERROR_BADFD) {
5312 cm_LockMarkSCacheLost(scp);
5316 /* interestingly, we have found an active lock
5317 belonging to an scache that has no
5319 cm_LockMarkSCacheLost(scp);
5326 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
5329 lock_ReleaseWrite(&scp->rw);
5331 lock_ObtainWrite(&cm_scacheLock);
5334 fileLock->lastUpdate = time(NULL);
5338 scp->lastRefreshCycle = cm_lockRefreshCycle;
5341 /* we have already refreshed the locks on this scp */
5342 fileLock->lastUpdate = time(NULL);
5345 cm_ReleaseSCacheNoLock(scp);
5347 } else if (IS_LOCK_ACTIVE(fileLock) && IS_LOCK_CLIENTONLY(fileLock)) {
5348 /* TODO: Check callbacks */
5352 lock_ReleaseWrite(&cm_scacheLock);
5353 osi_Log1(afsd_logp, "cm_CheckLocks completes lock check cycle %d", cm_lockRefreshCycle);
5356 /* NOT called with scp->rw held. */
5357 long cm_RetryLock(cm_file_lock_t *oldFileLock, int client_is_dead)
5360 cm_scache_t *scp = NULL;
5361 cm_file_lock_t *fileLock;
5365 int force_client_lock = FALSE;
5366 int has_insert = FALSE;
5367 int check_data_version = FALSE;
5371 if (client_is_dead) {
5372 code = CM_ERROR_TIMEDOUT;
5376 lock_ObtainRead(&cm_scacheLock);
5378 osi_Log2(afsd_logp, "cm_RetryLock checking lock %p (scp=%p)", oldFileLock, oldFileLock->scp);
5379 osi_Log4(afsd_logp, " offset(%x:%x) length(%x:%x)",
5380 (unsigned)(oldFileLock->range.offset >> 32),
5381 (unsigned)(oldFileLock->range.offset & 0xffffffff),
5382 (unsigned)(oldFileLock->range.length >> 32),
5383 (unsigned)(oldFileLock->range.length & 0xffffffff));
5384 osi_Log4(afsd_logp, " key<0x%x,0x%x,0x%x> flags=%x",
5385 oldFileLock->key.process_id, oldFileLock->key.session_id, oldFileLock->key.file_id,
5386 (unsigned)(oldFileLock->flags));
5388 /* if the lock has already been granted, then we have nothing to do */
5389 if (IS_LOCK_ACTIVE(oldFileLock)) {
5390 lock_ReleaseRead(&cm_scacheLock);
5391 osi_Log0(afsd_logp, "cm_RetryLock lock already granted");
5395 /* we can't do anything with lost or deleted locks at the moment. */
5396 if (IS_LOCK_LOST(oldFileLock) || IS_LOCK_DELETED(oldFileLock)) {
5397 code = CM_ERROR_BADFD;
5398 osi_Log0(afsd_logp, "cm_RetryLock lock is lost or deleted");
5399 lock_ReleaseRead(&cm_scacheLock);
5403 scp = oldFileLock->scp;
5405 osi_assertx(scp != NULL, "null cm_scache_t");
5407 lock_ReleaseRead(&cm_scacheLock);
5408 lock_ObtainWrite(&scp->rw);
5410 code = cm_LockCheckPerms(scp, oldFileLock->lockType,
5414 if (code == CM_ERROR_NOACCESS && oldFileLock->lockType == LockRead) {
5415 if (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp)) {
5416 force_client_lock = TRUE;
5420 lock_ReleaseWrite(&scp->rw);
5424 lock_ObtainWrite(&cm_scacheLock);
5426 /* Check if we already have a sufficient server lock to allow this
5427 lock to go through. */
5428 if (IS_LOCK_WAITLOCK(oldFileLock) &&
5429 (!SERVERLOCKS_ENABLED(scp) ||
5430 scp->serverLock == oldFileLock->lockType ||
5431 scp->serverLock == LockWrite)) {
5433 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5435 if (SERVERLOCKS_ENABLED(scp)) {
5436 osi_Log1(afsd_logp, "cm_RetryLock Server lock (%d) is sufficient for lock. Granting",
5437 (int) scp->serverLock);
5439 osi_Log0(afsd_logp, "cm_RetryLock skipping server lock for scp");
5442 lock_ReleaseWrite(&cm_scacheLock);
5443 lock_ReleaseWrite(&scp->rw);
5448 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
5450 /* check if the conflicting locks have dissappeared already */
5451 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5453 fileLock = (cm_file_lock_t *)
5454 ((char *) q - offsetof(cm_file_lock_t, fileq));
5456 if (IS_LOCK_LOST(fileLock)) {
5457 if (cm_KeyEquals(&fileLock->key, &oldFileLock->key, 0)) {
5458 code = CM_ERROR_BADFD;
5459 oldFileLock->flags |= CM_FILELOCK_FLAG_LOST;
5460 osi_Log1(afsd_logp, " found lost lock %p for same key. Marking lock as lost",
5463 } else if (fileLock->lockType == LockWrite &&
5464 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
5465 osi_Log1(afsd_logp, " found conflicting LOST lock %p", fileLock);
5466 code = CM_ERROR_WOULDBLOCK;
5471 if (IS_LOCK_ACCEPTED(fileLock) &&
5472 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
5474 if (oldFileLock->lockType != LockRead ||
5475 fileLock->lockType != LockRead) {
5477 osi_Log1(afsd_logp, " found conflicting lock %p", fileLock);
5478 code = CM_ERROR_WOULDBLOCK;
5486 lock_ReleaseWrite(&cm_scacheLock);
5487 lock_ReleaseWrite(&scp->rw);
5492 /* when we get here, the lock is either a WAITUNLOCK or WAITLOCK.
5493 If it is WAITUNLOCK, then we didn't find any conflicting lock
5494 but we haven't verfied whether the serverLock is sufficient to
5495 assert it. If it is WAITLOCK, then the serverLock is
5496 insufficient to assert it. Eitherway, we are ready to accept
5497 the lock as either ACTIVE or WAITLOCK depending on the
5500 /* First, promote the WAITUNLOCK to a WAITLOCK */
5501 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
5502 if (oldFileLock->lockType == LockRead)
5505 scp->exclusiveLocks++;
5507 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITUNLOCK;
5508 oldFileLock->flags |= CM_FILELOCK_FLAG_WAITLOCK;
5511 osi_assertx(IS_LOCK_WAITLOCK(oldFileLock), "!IS_LOCK_WAITLOCK");
5513 if (force_client_lock ||
5514 !SERVERLOCKS_ENABLED(scp) ||
5515 scp->serverLock == oldFileLock->lockType ||
5516 (oldFileLock->lockType == LockRead &&
5517 scp->serverLock == LockWrite)) {
5519 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5521 if ((force_client_lock ||
5522 !SERVERLOCKS_ENABLED(scp)) &&
5523 !IS_LOCK_CLIENTONLY(oldFileLock)) {
5525 oldFileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
5527 if (oldFileLock->lockType == LockRead)
5530 scp->exclusiveLocks--;
5535 lock_ReleaseWrite(&cm_scacheLock);
5536 lock_ReleaseWrite(&scp->rw);
5543 code = cm_SyncOp(scp, NULL, oldFileLock->userp, &req, 0,
5544 CM_SCACHESYNC_NEEDCALLBACK
5545 | CM_SCACHESYNC_GETSTATUS
5546 | CM_SCACHESYNC_LOCK);
5548 osi_Log1(afsd_logp, "cm_RetryLock SyncOp failure code 0x%x", code);
5549 lock_ReleaseWrite(&cm_scacheLock);
5550 goto post_syncopdone;
5553 if (!IS_LOCK_WAITLOCK(oldFileLock))
5554 goto pre_syncopdone;
5556 userp = oldFileLock->userp;
5558 #ifndef AGGRESSIVE_LOCKS
5559 newLock = oldFileLock->lockType;
5561 newLock = LockWrite;
5565 /* if has_insert is non-zero, then:
5566 - the lock a LockRead
5567 - we don't have permission to get a LockRead
5568 - we do have permission to get a LockWrite
5569 - the server supports VICED_CAPABILITY_WRITELOCKACL
5572 newLock = LockWrite;
5575 lock_ReleaseWrite(&cm_scacheLock);
5577 /* when we get here, either we have a read-lock and want a
5578 write-lock or we don't have any locks and we want some
5581 if (scp->serverLock == LockRead) {
5583 osi_assertx(newLock == LockWrite, "!LockWrite");
5585 osi_Log0(afsd_logp, " Attempting to UPGRADE from LockRead to LockWrite");
5587 scp->lockDataVersion = scp->dataVersion;
5588 check_data_version = TRUE;
5590 code = cm_IntReleaseLock(scp, userp, &req);
5593 goto pre_syncopdone;
5595 scp->serverLock = -1;
5598 code = cm_IntSetLock(scp, userp, newLock, &req);
5601 if (scp->dataVersion != scp->lockDataVersion) {
5602 /* we lost a race. too bad */
5605 " Data version mismatch while upgrading lock.");
5607 " Data versions before=%I64d, after=%I64d",
5608 scp->lockDataVersion,
5611 " Releasing stale lock for scp 0x%x", scp);
5613 code = cm_IntReleaseLock(scp, userp, &req);
5615 scp->serverLock = -1;
5617 code = CM_ERROR_INVAL;
5619 cm_LockMarkSCacheLost(scp);
5621 scp->serverLock = newLock;
5626 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
5632 if (code != 0 && code != CM_ERROR_WOULDBLOCK) {
5633 lock_ObtainWrite(&cm_scacheLock);
5634 if (scp->fileLocksT == &oldFileLock->fileq)
5635 scp->fileLocksT = osi_QPrev(&oldFileLock->fileq);
5636 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, &oldFileLock->fileq);
5637 lock_ReleaseWrite(&cm_scacheLock);
5639 lock_ReleaseWrite(&scp->rw);
5642 lock_ObtainWrite(&cm_scacheLock);
5644 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5645 } else if (code != CM_ERROR_WOULDBLOCK) {
5646 oldFileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5647 cm_ReleaseUser(oldFileLock->userp);
5648 oldFileLock->userp = NULL;
5649 if (oldFileLock->scp) {
5650 cm_ReleaseSCacheNoLock(oldFileLock->scp);
5651 oldFileLock->scp = NULL;
5654 lock_ReleaseWrite(&cm_scacheLock);
5659 cm_key_t cm_GenerateKey(afs_uint16 session_id, afs_offs_t process_id, afs_uint16 file_id)
5663 key.process_id = process_id;
5664 key.session_id = session_id;
5665 key.file_id = file_id;
5670 int cm_KeyEquals(cm_key_t *k1, cm_key_t *k2, int flags)
5672 return (k1->session_id == k2->session_id) && (k1->file_id == k2->file_id) &&
5673 ((flags & CM_UNLOCK_BY_FID) || (k1->process_id == k2->process_id));
5676 void cm_ReleaseAllLocks(void)
5682 cm_file_lock_t *fileLock;
5685 for (i = 0; i < cm_data.scacheHashTableSize; i++)
5687 for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
5688 while (scp->fileLocksH != NULL) {
5689 lock_ObtainWrite(&scp->rw);
5690 lock_ObtainWrite(&cm_scacheLock);
5691 if (!scp->fileLocksH) {
5692 lock_ReleaseWrite(&cm_scacheLock);
5693 lock_ReleaseWrite(&scp->rw);
5696 fileLock = (cm_file_lock_t *)((char *) scp->fileLocksH - offsetof(cm_file_lock_t, fileq));
5697 userp = fileLock->userp;
5699 key = fileLock->key;
5700 cm_HoldSCacheNoLock(scp);
5701 lock_ReleaseWrite(&cm_scacheLock);
5702 cm_UnlockByKey(scp, key, 0, userp, &req);
5703 cm_ReleaseSCache(scp);
5704 cm_ReleaseUser(userp);
5705 lock_ReleaseWrite(&scp->rw);