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 <afsconfig.h>
11 #include <afs/param.h>
33 extern void afsi_log(char *pattern, ...);
36 int cm_enableServerLocks = 1;
38 int cm_followBackupPath = 0;
41 * Case-folding array. This was constructed by inspecting of SMBtrace output.
42 * I do not know anything more about it.
44 unsigned char cm_foldUpper[256] = {
45 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
46 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
47 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
48 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
49 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
50 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
51 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
52 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
53 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
54 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
55 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
56 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
57 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
58 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
59 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
60 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
61 0x80, 0x9a, 0x90, 0x41, 0x8e, 0x41, 0x8f, 0x80,
62 0x45, 0x45, 0x45, 0x49, 0x49, 0x49, 0x8e, 0x8f,
63 0x90, 0x92, 0x92, 0x4f, 0x99, 0x4f, 0x55, 0x55,
64 0x59, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
65 0x41, 0x49, 0x4f, 0x55, 0xa5, 0xa5, 0x56, 0xa7,
66 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
67 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
68 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
69 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
70 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
71 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
72 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
73 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
74 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
75 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
76 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
80 * Case-insensitive string comparison. We used to use stricmp, but it doesn't
81 * know about 8-bit characters (e.g. 129 is lowercase u-umlaut, 154 is
82 * upper-case u-umlaut).
84 int cm_stricmp(const char *str1, const char *str2)
96 c1 = (char) cm_foldUpper[(unsigned char)(*str1++)];
97 c2 = (char) cm_foldUpper[(unsigned char)(*str2++)];
107 /* return success if we can open this file in this mode */
108 long cm_CheckOpen(cm_scache_t *scp, int openMode, int trunc, cm_user_t *userp,
116 rights |= PRSFS_READ;
117 if (openMode == 1 || openMode == 2 || trunc)
118 rights |= PRSFS_WRITE;
120 lock_ObtainWrite(&scp->rw);
122 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
123 CM_SCACHESYNC_GETSTATUS
124 | CM_SCACHESYNC_NEEDCALLBACK
125 | CM_SCACHESYNC_LOCK);
128 ((rights & PRSFS_WRITE) || (rights & PRSFS_READ)) &&
129 scp->fileType == CM_SCACHETYPE_FILE) {
132 unsigned int sLockType;
133 LARGE_INTEGER LOffset, LLength;
135 /* Check if there's some sort of lock on the file at the
138 key = cm_GenerateKey(CM_SESSION_CMINT,0,0);
140 if (rights & PRSFS_WRITE)
143 sLockType = LOCKING_ANDX_SHARED_LOCK;
145 LOffset.HighPart = CM_FLSHARE_OFFSET_HIGH;
146 LOffset.LowPart = CM_FLSHARE_OFFSET_LOW;
147 LLength.HighPart = CM_FLSHARE_LENGTH_HIGH;
148 LLength.LowPart = CM_FLSHARE_LENGTH_LOW;
150 code = cm_Lock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp, NULL);
153 cm_Unlock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp);
155 /* In this case, we allow the file open to go through even
156 though we can't enforce mandatory locking on the
158 if (code == CM_ERROR_NOACCESS &&
159 !(rights & PRSFS_WRITE))
162 if (code == CM_ERROR_LOCK_NOT_GRANTED)
163 code = CM_ERROR_SHARING_VIOLATION;
167 } else if (code != 0) {
171 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
175 lock_ReleaseWrite(&scp->rw);
180 /* return success if we can open this file in this mode */
181 long cm_CheckNTOpen(cm_scache_t *scp,
182 unsigned int desiredAccess,
183 unsigned int shareAccess,
184 unsigned int createDisp,
185 afs_offs_t process_id,
186 afs_offs_t handle_id,
187 cm_user_t *userp, cm_req_t *reqp,
188 cm_lock_data_t **ldpp)
192 afs_uint16 session_id;
194 osi_assertx(ldpp != NULL, "null cm_lock_data_t");
197 /* compute the session id */
198 if (reqp->flags & CM_REQ_SOURCE_SMB)
199 session_id = CM_SESSION_SMB;
200 else if (reqp->flags & CM_REQ_SOURCE_REDIR)
201 session_id = CM_SESSION_IFS;
203 session_id = CM_SESSION_CMINT;
205 /* Ignore the SYNCHRONIZE privilege */
206 desiredAccess &= ~SYNCHRONIZE;
208 /* Always allow delete; the RPC will tell us if it's OK */
211 if (desiredAccess == DELETE)
214 /* Always allow reading attributes (Hidden, System, Readonly, ...) */
215 if (desiredAccess == FILE_READ_ATTRIBUTES)
218 if (desiredAccess & (AFS_ACCESS_READ|AFS_ACCESS_EXECUTE))
219 rights |= (scp->fileType == CM_SCACHETYPE_DIRECTORY ? PRSFS_LOOKUP : PRSFS_READ);
221 /* We used to require PRSFS_WRITE if createDisp was 4
222 (OPEN_ALWAYS) even if AFS_ACCESS_WRITE was not requested.
223 However, we don't need to do that since the existence of the
224 scp implies that we don't need to create it. */
225 if (desiredAccess & AFS_ACCESS_WRITE)
226 rights |= PRSFS_WRITE;
228 if (desiredAccess & DELETE)
229 rights |= PRSFS_DELETE;
231 lock_ObtainWrite(&scp->rw);
233 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
234 CM_SCACHESYNC_GETSTATUS
235 | CM_SCACHESYNC_NEEDCALLBACK
236 | CM_SCACHESYNC_LOCK);
239 * If the open will fail because the volume is readonly, then we will
240 * return an access denied error instead. This is to help brain-dead
241 * apps run correctly on replicated volumes.
242 * See defect 10007 for more information.
244 if (code == CM_ERROR_READONLY)
245 code = CM_ERROR_NOACCESS;
248 !(shareAccess & FILE_SHARE_WRITE) &&
249 ((rights & PRSFS_WRITE) || (rights & PRSFS_READ)) &&
250 scp->fileType == CM_SCACHETYPE_FILE) {
252 unsigned int sLockType;
253 LARGE_INTEGER LOffset, LLength;
255 /* Check if there's some sort of lock on the file at the
258 if (rights & PRSFS_WRITE)
261 sLockType = LOCKING_ANDX_SHARED_LOCK;
263 key = cm_GenerateKey(session_id, process_id, 0);
265 /* single byte lock at offset 0x0100 0000 0000 0000 */
266 LOffset.HighPart = CM_FLSHARE_OFFSET_HIGH;
267 LOffset.LowPart = CM_FLSHARE_OFFSET_LOW;
268 LLength.HighPart = CM_FLSHARE_LENGTH_HIGH;
269 LLength.LowPart = CM_FLSHARE_LENGTH_LOW;
271 code = cm_Lock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp, NULL);
274 (*ldpp) = (cm_lock_data_t *)malloc(sizeof(cm_lock_data_t));
281 (*ldpp)->sLockType = sLockType;
282 (*ldpp)->LOffset.HighPart = LOffset.HighPart;
283 (*ldpp)->LOffset.LowPart = LOffset.LowPart;
284 (*ldpp)->LLength.HighPart = LLength.HighPart;
285 (*ldpp)->LLength.LowPart = LLength.LowPart;
288 * In this case, we allow the file open to go through even
289 * though we can't enforce mandatory locking on the
291 if (code == CM_ERROR_NOACCESS &&
292 !(rights & PRSFS_WRITE))
295 if (code == CM_ERROR_LOCK_NOT_GRANTED)
296 code = CM_ERROR_SHARING_VIOLATION;
299 } else if (code != 0) {
304 lock_ReleaseWrite(&scp->rw);
307 osi_Log3(afsd_logp,"cm_CheckNTOpen scp 0x%p ldp 0x%p code 0x%x", scp, *ldpp, code);
311 extern long cm_CheckNTOpenDone(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp,
312 cm_lock_data_t ** ldpp)
314 osi_Log2(afsd_logp,"cm_CheckNTOpenDone scp 0x%p ldp 0x%p", scp, ldpp ? *ldpp : 0);
315 lock_ObtainWrite(&scp->rw);
317 cm_Unlock(scp, (*ldpp)->sLockType, (*ldpp)->LOffset, (*ldpp)->LLength,
318 (*ldpp)->key, 0, userp, reqp);
322 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
323 lock_ReleaseWrite(&scp->rw);
327 * When CAP_NT_SMBS has been negotiated, deletion (of files or directories) is
328 * done in three steps:
329 * (1) open for deletion (NT_CREATE_AND_X)
330 * (2) set for deletion on close (NT_TRANSACTION2, SET_FILE_INFO)
332 * We must not do the RPC until step 3. But if we are going to return an error
333 * code (e.g. directory not empty), we must return it by step 2, otherwise most
334 * clients will not notice it. So we do a preliminary check. For deleting
335 * files, this is almost free, since we have already done the RPC to get the
336 * parent directory's status bits. But for deleting directories, we must do an
337 * additional RPC to get the directory's data to check if it is empty. Sigh.
339 long cm_CheckNTDelete(cm_scache_t *dscp, cm_scache_t *scp, cm_user_t *userp,
345 cm_dirEntry_t *dep = 0;
346 unsigned short *hashTable;
348 int BeyondPage = 0, HaveDot = 0, HaveDotDot = 0;
351 /* First check permissions */
352 lock_ObtainWrite(&scp->rw);
353 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_DELETE,
354 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
356 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
357 lock_ReleaseWrite(&scp->rw);
361 /* If deleting directory, must be empty */
363 if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
366 thyper.HighPart = 0; thyper.LowPart = 0;
367 code = buf_Get(scp, &thyper, reqp, &bufferp);
371 lock_ObtainMutex(&bufferp->mx);
372 lock_ObtainWrite(&scp->rw);
375 code = cm_SyncOp(scp, bufferp, userp, reqp, 0,
376 CM_SCACHESYNC_NEEDCALLBACK
378 | CM_SCACHESYNC_BUFLOCKED);
382 if (cm_HaveBuffer(scp, bufferp, 1))
385 /* otherwise, load the buffer and try again */
386 lock_ReleaseMutex(&bufferp->mx);
387 code = cm_GetBuffer(scp, bufferp, NULL, userp, reqp);
388 lock_ReleaseWrite(&scp->rw);
389 lock_ObtainMutex(&bufferp->mx);
390 lock_ObtainWrite(&scp->rw);
391 cm_SyncOpDone(scp, bufferp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ | CM_SCACHESYNC_BUFLOCKED);
396 lock_ReleaseWrite(&scp->rw);
399 /* We try to determine emptiness without looking beyond the first page,
400 * and without assuming "." and ".." are present and are on the first
401 * page (though these assumptions might, after all, be reasonable).
403 hashTable = (unsigned short *)(bufferp->datap + (32 * 5));
404 for (i=0; i<128; i++) {
405 idx = ntohs(hashTable[i]);
411 dep = (cm_dirEntry_t *)(bufferp->datap + (32 * idx));
412 if (strcmp(dep->name, ".") == 0)
414 else if (strcmp(dep->name, "..") == 0)
417 code = CM_ERROR_NOTEMPTY;
420 idx = ntohs(dep->next);
423 if (BeyondPage && HaveDot && HaveDotDot)
424 code = CM_ERROR_NOTEMPTY;
428 lock_ReleaseMutex(&bufferp->mx);
429 buf_Release(bufferp);
431 lock_ReleaseWrite(&scp->rw);
436 * Iterate through all entries in a directory.
437 * When the function funcp is called, the buffer is locked but the
438 * directory vnode is not.
440 * If the retscp parameter is not NULL, the parmp must be a
441 * cm_lookupSearch_t object.
443 long cm_ApplyDir(cm_scache_t *scp, cm_DirFuncp_t funcp, void *parmp,
444 osi_hyper_t *startOffsetp, cm_user_t *userp, cm_req_t *reqp,
445 cm_scache_t **retscp)
449 cm_dirEntry_t *dep = 0;
452 osi_hyper_t dirLength;
453 osi_hyper_t bufferOffset;
454 osi_hyper_t curOffset;
458 cm_pageHeader_t *pageHeaderp;
460 long nextEntryCookie;
461 int numDirChunks; /* # of 32 byte dir chunks in this entry */
463 /* get the directory size */
464 lock_ObtainWrite(&scp->rw);
465 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_LOOKUP,
466 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
467 lock_ReleaseWrite(&scp->rw);
471 if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
472 return CM_ERROR_NOTDIR;
474 if (retscp) /* if this is a lookup call */
476 cm_lookupSearch_t* sp = parmp;
479 #ifdef AFS_FREELANCE_CLIENT
480 /* Freelance entries never end up in the DNLC because they
481 * do not have an associated cm_server_t
483 !(cm_freelanceEnabled &&
484 sp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
485 sp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
486 #else /* !AFS_FREELANCE_CLIENT */
491 int casefold = sp->caseFold;
492 sp->caseFold = 0; /* we have a strong preference for exact matches */
493 if ( *retscp = cm_dnlcLookup(scp, sp)) /* dnlc hit */
495 sp->caseFold = casefold;
498 sp->caseFold = casefold;
502 * see if we can find it using the directory hash tables.
503 * we can only do exact matches, since the hash is case
506 if (funcp != (cm_DirFuncp_t)cm_BPlusDirFoo)
515 code = cm_BeginDirOp(scp, userp, reqp, CM_DIRLOCK_READ,
516 CM_DIROP_FLAG_NONE, &dirop);
520 code = cm_BPlusDirLookup(&dirop, sp->nsearchNamep, &sp->fid);
525 code = cm_DirLookup(&dirop, sp->searchNamep, &sp->fid);
533 sp->ExactFound = TRUE;
534 *retscp = NULL; /* force caller to call cm_GetSCache() */
539 if (sp->caseFold && code == CM_ERROR_INEXACT_MATCH) {
542 sp->ExactFound = FALSE;
543 *retscp = NULL; /* force caller to call cm_GetSCache() */
547 return CM_ERROR_BPLUS_NOMATCH;
554 * XXX We only get the length once. It might change when we drop the
557 dirLength = scp->length;
560 bufferOffset.LowPart = bufferOffset.HighPart = 0;
562 curOffset = *startOffsetp;
564 curOffset.HighPart = 0;
565 curOffset.LowPart = 0;
569 /* make sure that curOffset.LowPart doesn't point to the first
570 * 32 bytes in the 2nd through last dir page, and that it
571 * doesn't point at the first 13 32-byte chunks in the first
572 * dir page, since those are dir and page headers, and don't
573 * contain useful information.
575 temp = curOffset.LowPart & (2048-1);
576 if (curOffset.HighPart == 0 && curOffset.LowPart < 2048) {
577 /* we're in the first page */
578 if (temp < 13*32) temp = 13*32;
581 /* we're in a later dir page */
582 if (temp < 32) temp = 32;
585 /* make sure the low order 5 bits are zero */
588 /* now put temp bits back ito curOffset.LowPart */
589 curOffset.LowPart &= ~(2048-1);
590 curOffset.LowPart |= temp;
592 /* check if we've passed the dir's EOF */
593 if (LargeIntegerGreaterThanOrEqualTo(curOffset, dirLength))
596 /* see if we can use the bufferp we have now; compute in which
597 * page the current offset would be, and check whether that's
598 * the offset of the buffer we have. If not, get the buffer.
600 thyper.HighPart = curOffset.HighPart;
601 thyper.LowPart = curOffset.LowPart & ~(cm_data.buf_blockSize-1);
602 if (!bufferp || !LargeIntegerEqualTo(thyper, bufferOffset)) {
605 lock_ReleaseMutex(&bufferp->mx);
606 buf_Release(bufferp);
610 code = buf_Get(scp, &thyper, reqp, &bufferp);
612 /* if buf_Get() fails we do not have a buffer object to lock */
617 lock_ObtainMutex(&bufferp->mx);
618 bufferOffset = thyper;
620 /* now get the data in the cache */
622 lock_ObtainWrite(&scp->rw);
623 code = cm_SyncOp(scp, bufferp, userp, reqp,
625 CM_SCACHESYNC_NEEDCALLBACK
627 | CM_SCACHESYNC_BUFLOCKED);
629 lock_ReleaseWrite(&scp->rw);
632 cm_SyncOpDone(scp, bufferp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ | CM_SCACHESYNC_BUFLOCKED);
634 if (cm_HaveBuffer(scp, bufferp, 1)) {
635 lock_ReleaseWrite(&scp->rw);
639 /* otherwise, load the buffer and try again */
640 lock_ReleaseMutex(&bufferp->mx);
641 code = cm_GetBuffer(scp, bufferp, NULL, userp,
643 lock_ReleaseWrite(&scp->rw);
644 lock_ObtainMutex(&bufferp->mx);
649 lock_ReleaseMutex(&bufferp->mx);
650 buf_Release(bufferp);
654 } /* if (wrong buffer) ... */
656 /* now we have the buffer containing the entry we're interested
657 * in; copy it out if it represents a non-deleted entry.
659 entryInDir = curOffset.LowPart & (2048-1);
660 entryInBuffer = curOffset.LowPart & (cm_data.buf_blockSize - 1);
662 /* page header will help tell us which entries are free. Page
663 * header can change more often than once per buffer, since
664 * AFS 3 dir page size may be less than (but not more than) a
665 * buffer package buffer.
667 /* only look intra-buffer */
668 temp = curOffset.LowPart & (cm_data.buf_blockSize - 1);
669 temp &= ~(2048 - 1); /* turn off intra-page bits */
670 pageHeaderp = (cm_pageHeader_t *) (bufferp->datap + temp);
672 /* now determine which entry we're looking at in the page. If
673 * it is free (there's a free bitmap at the start of the dir),
674 * we should skip these 32 bytes.
676 slotInPage = (entryInDir & 0x7e0) >> 5;
677 if (!(pageHeaderp->freeBitmap[slotInPage>>3]
678 & (1 << (slotInPage & 0x7)))) {
679 /* this entry is free */
680 numDirChunks = 1; /* only skip this guy */
684 tp = bufferp->datap + entryInBuffer;
685 dep = (cm_dirEntry_t *) tp; /* now points to AFS3 dir entry */
688 * here are some consistency checks
690 if (dep->flag != CM_DIR_FFIRST ||
691 strlen(dep->name) > 256) {
692 code = CM_ERROR_INVAL;
694 "cm_ApplyDir invalid directory entry for scp %p bufp %p",
696 osi_Log4(afsd_logp,"... cell %u vol %u vnode %u uniq %u",
697 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
698 bufferp->dataVersion = CM_BUF_VERSION_BAD;
702 /* while we're here, compute the next entry's location, too,
703 * since we'll need it when writing out the cookie into the
704 * dir listing stream.
706 numDirChunks = cm_NameEntries(dep->name, NULL);
708 /* compute the offset of the cookie representing the next entry */
709 nextEntryCookie = curOffset.LowPart
710 + (CM_DIR_CHUNKSIZE * numDirChunks);
712 if (dep->fid.vnode != 0) {
713 /* this is one of the entries to use: it is not deleted */
714 code = (*funcp)(scp, dep, parmp, &curOffset);
717 } /* if we're including this name */
720 /* and adjust curOffset to be where the new cookie is */
722 thyper.LowPart = CM_DIR_CHUNKSIZE * numDirChunks;
723 curOffset = LargeIntegerAdd(thyper, curOffset);
724 } /* while copying data for dir listing */
726 /* release the mutex */
728 lock_ReleaseMutex(&bufferp->mx);
729 buf_Release(bufferp);
734 int cm_NoneUpper(normchar_t *s)
738 if (c >= 'A' && c <= 'Z')
743 int cm_NoneLower(normchar_t *s)
747 if (c >= 'a' && c <= 'z')
752 long cm_LookupSearchProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
755 cm_lookupSearch_t *sp;
757 normchar_t matchName[MAX_PATH];
758 int looking_for_short_name = FALSE;
760 sp = (cm_lookupSearch_t *) rockp;
762 if (cm_FsStringToNormString(dep->name, -1, matchName, lengthof(matchName)) == 0) {
763 /* Can't normalize FS string. */
768 match = cm_NormStrCmpI(matchName, sp->nsearchNamep);
770 match = cm_NormStrCmp(matchName, sp->nsearchNamep);
774 && !cm_Is8Dot3(matchName)) {
776 cm_Gen8Dot3NameInt(dep->name, &dep->fid, matchName, NULL);
778 match = cm_NormStrCmpI(matchName, sp->nsearchNamep);
780 match = cm_NormStrCmp(matchName, sp->nsearchNamep);
781 looking_for_short_name = TRUE;
791 if (!sp->caseFold || looking_for_short_name) {
792 cm_SetFid(&sp->fid, sp->fid.cell, sp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
793 return CM_ERROR_STOPNOW;
797 * If we get here, we are doing a case-insensitive search, and we
798 * have found a match. Now we determine what kind of match it is:
799 * exact, lower-case, upper-case, or none of the above. This is done
800 * in order to choose among matches, if there are more than one.
803 /* Exact matches are the best. */
804 match = cm_NormStrCmp(matchName, sp->nsearchNamep);
807 cm_SetFid(&sp->fid, sp->fid.cell, sp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
808 return CM_ERROR_STOPNOW;
811 /* Lower-case matches are next. */
814 if (cm_NoneUpper(matchName)) {
819 /* Upper-case matches are next. */
822 if (cm_NoneLower(matchName)) {
827 /* General matches are last. */
833 cm_SetFid(&sp->fid, sp->fid.cell, sp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
837 /* read the contents of a mount point into the appropriate string.
838 * called with write locked scp, and returns with locked scp.
840 long cm_ReadMountPoint(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp)
844 if (scp->mountPointStringp[0])
847 #ifdef AFS_FREELANCE_CLIENT
848 /* File servers do not have data for freelance entries */
849 if (cm_freelanceEnabled &&
850 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
851 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
853 code = cm_FreelanceFetchMountPointString(scp);
855 #endif /* AFS_FREELANCE_CLIENT */
857 char temp[MOUNTPOINTLEN];
860 /* otherwise, we have to read it in */
861 offset.LowPart = offset.HighPart = 0;
862 code = cm_GetData(scp, &offset, temp, MOUNTPOINTLEN, userp, reqp);
867 * scp->length is the actual length of the mount point string.
868 * It is current because cm_GetData merged the most up to date
869 * status info into scp and has not dropped the rwlock since.
871 if (scp->length.LowPart > MOUNTPOINTLEN - 1)
872 return CM_ERROR_TOOBIG;
873 if (scp->length.LowPart == 0)
874 return CM_ERROR_INVAL;
876 /* convert the terminating dot to a NUL */
877 temp[scp->length.LowPart - 1] = 0;
878 memcpy(scp->mountPointStringp, temp, scp->length.LowPart);
885 /* called with a locked scp and chases the mount point, yielding outScpp.
886 * scp remains write locked, just for simplicity of describing the interface.
888 long cm_FollowMountPoint(cm_scache_t *scp, cm_scache_t *dscp, cm_user_t *userp,
889 cm_req_t *reqp, cm_scache_t **outScpp)
891 fschar_t *cellNamep = NULL;
892 fschar_t *volNamep = NULL;
896 cm_volume_t *volp = NULL;
905 if (scp->mountRootFid.cell != 0 && scp->mountRootGen >= cm_data.mountRootGen) {
906 tfid = scp->mountRootFid;
907 lock_ReleaseWrite(&scp->rw);
908 code = cm_GetSCache(&tfid, outScpp, userp, reqp);
909 lock_ObtainWrite(&scp->rw);
913 /* parse the volume name */
914 mpNamep = scp->mountPointStringp;
916 return CM_ERROR_NOSUCHPATH;
917 mtType = *scp->mountPointStringp;
919 cp = cm_FsStrChr(mpNamep, _FS(':'));
921 /* cellular mount point */
922 cellNamep = (fschar_t *)malloc((cp - mpNamep) * sizeof(fschar_t));
923 cm_FsStrCpyN(cellNamep, cp - mpNamep, mpNamep + 1, cp - mpNamep - 1);
924 volNamep = cm_FsStrDup(cp+1);
926 /* now look up the cell */
927 lock_ReleaseWrite(&scp->rw);
928 cellp = cm_GetCell(cellNamep, CM_FLAG_CREATE);
929 lock_ObtainWrite(&scp->rw);
932 volNamep = cm_FsStrDup(mpNamep + 1);
934 #ifdef AFS_FREELANCE_CLIENT
936 * Mount points in the Freelance cell should default
937 * to the workstation cell.
939 if (cm_freelanceEnabled &&
940 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
941 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
943 fschar_t rootCellName[256]="";
944 cm_GetRootCellName(rootCellName);
945 cellp = cm_GetCell(rootCellName, 0);
947 #endif /* AFS_FREELANCE_CLIENT */
948 cellp = cm_FindCellByID(scp->fid.cell, 0);
952 code = CM_ERROR_NOSUCHCELL;
956 vnLength = cm_FsStrLen(volNamep);
957 if (vnLength >= 8 && cm_FsStrCmp(volNamep + vnLength - 7, ".backup") == 0)
958 targetType = BACKVOL;
959 else if (vnLength >= 10
960 && cm_FsStrCmp(volNamep + vnLength - 9, ".readonly") == 0)
965 /* check for backups within backups */
966 if (targetType == BACKVOL
967 && (scp->flags & (CM_SCACHEFLAG_RO | CM_SCACHEFLAG_PURERO))
968 == CM_SCACHEFLAG_RO) {
969 code = CM_ERROR_NOSUCHVOLUME;
973 /* now we need to get the volume */
974 lock_ReleaseWrite(&scp->rw);
975 if (cm_VolNameIsID(volNamep)) {
976 code = cm_FindVolumeByID(cellp, atoi(volNamep), userp, reqp,
977 CM_GETVOL_FLAG_CREATE, &volp);
979 code = cm_FindVolumeByName(cellp, volNamep, userp, reqp,
980 CM_GETVOL_FLAG_CREATE, &volp);
982 lock_ObtainWrite(&scp->rw);
985 afs_uint32 cell, volume;
986 cm_vol_state_t *statep;
988 cell = cellp->cellID;
990 /* if the mt pt originates in a .backup volume (not a .readonly)
991 * and FollowBackupPath is active, and if there is a .backup
992 * volume for the target, then use the .backup of the target
993 * instead of the read-write.
995 if (cm_followBackupPath &&
996 volp->vol[BACKVOL].ID != 0 &&
997 (dscp->flags & (CM_SCACHEFLAG_RO|CM_SCACHEFLAG_PURERO)) == CM_SCACHEFLAG_RO &&
998 (targetType == RWVOL || targetType == ROVOL && volp->vol[ROVOL].ID == 0)
1000 targetType = BACKVOL;
1002 /* if the mt pt is in a read-only volume (not just a
1003 * backup), and if there is a read-only volume for the
1004 * target, and if this is a targetType '#' mount point, use
1005 * the read-only, otherwise use the one specified.
1007 else if (mtType == '#' && targetType == RWVOL &&
1008 (scp->flags & CM_SCACHEFLAG_PURERO) &&
1009 volp->vol[ROVOL].ID != 0) {
1013 lock_ObtainWrite(&volp->rw);
1014 statep = cm_VolumeStateByType(volp, targetType);
1015 volume = statep->ID;
1016 statep->dotdotFid = dscp->fid;
1017 lock_ReleaseWrite(&volp->rw);
1019 /* the rest of the fid is a magic number */
1020 cm_SetFid(&scp->mountRootFid, cell, volume, 1, 1);
1021 scp->mountRootGen = cm_data.mountRootGen;
1023 tfid = scp->mountRootFid;
1024 lock_ReleaseWrite(&scp->rw);
1025 code = cm_GetSCache(&tfid, outScpp, userp, reqp);
1026 lock_ObtainWrite(&scp->rw);
1039 long cm_LookupInternal(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_user_t *userp,
1040 cm_req_t *reqp, cm_scache_t **outScpp)
1043 int dnlcHit = 1; /* did we hit in the dnlc? yes, we did */
1044 cm_scache_t *tscp = NULL;
1045 cm_scache_t *mountedScp;
1046 cm_lookupSearch_t rock;
1048 normchar_t *nnamep = NULL;
1049 fschar_t *fnamep = NULL;
1054 memset(&rock, 0, sizeof(rock));
1056 if (dscp->fid.vnode == 1 && dscp->fid.unique == 1
1057 && cm_ClientStrCmp(cnamep, _C("..")) == 0) {
1058 if (dscp->dotdotFid.volume == 0)
1059 return CM_ERROR_NOSUCHVOLUME;
1060 rock.fid = dscp->dotdotFid;
1062 } else if (cm_ClientStrCmp(cnamep, _C(".")) == 0) {
1063 rock.fid = dscp->fid;
1067 nnamep = cm_ClientStringToNormStringAlloc(cnamep, -1, NULL);
1069 code = CM_ERROR_NOSUCHFILE;
1072 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
1074 code = CM_ERROR_NOSUCHFILE;
1079 if (flags & CM_FLAG_NOMOUNTCHASE) {
1080 /* In this case, we should go and call cm_Dir* functions
1081 directly since the following cm_ApplyDir() function will
1089 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
1090 CM_DIROP_FLAG_NONE, &dirop);
1093 code = cm_BPlusDirLookup(&dirop, nnamep, &rock.fid);
1098 code = cm_DirLookup(&dirop, fnamep, &rock.fid);
1100 cm_EndDirOp(&dirop);
1110 if (code == CM_ERROR_INEXACT_MATCH && (flags & CM_FLAG_CASEFOLD)) {
1117 code = CM_ERROR_BPLUS_NOMATCH;
1123 rock.fid.cell = dscp->fid.cell;
1124 rock.fid.volume = dscp->fid.volume;
1125 rock.searchNamep = fnamep;
1126 rock.nsearchNamep = nnamep;
1127 rock.caseFold = (flags & CM_FLAG_CASEFOLD);
1128 rock.hasTilde = ((cm_ClientStrChr(cnamep, '~') != NULL) ? 1 : 0);
1130 /* If NOMOUNTCHASE, bypass DNLC by passing NULL scp pointer */
1131 code = cm_ApplyDir(dscp, cm_LookupSearchProc, &rock, NULL, userp, reqp,
1132 (flags & CM_FLAG_NOMOUNTCHASE) ? NULL : &tscp);
1134 /* code == 0 means we fell off the end of the dir, while stopnow means
1135 * that we stopped early, probably because we found the entry we're
1136 * looking for. Any other non-zero code is an error.
1138 if (code && code != CM_ERROR_STOPNOW && code != CM_ERROR_BPLUS_NOMATCH) {
1139 /* if the cm_scache_t we are searching in is not a directory
1140 * we must return path not found because the error
1141 * is to describe the final component not an intermediary
1143 if (code == CM_ERROR_NOTDIR) {
1144 if (flags & CM_FLAG_CHECKPATH)
1145 code = CM_ERROR_NOSUCHPATH;
1147 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 */
1173 osi_Log1(afsd_logp,"cm_Lookup adding mount for non-existent directory: %S",
1174 osi_LogSaveClientString(afsd_logp,cnamep));
1177 * There is an ugly behavior where a share name "foo" will be searched
1178 * for as "fo". If the searched for name differs by an already existing
1179 * symlink or mount point in the Freelance directory, do not add the
1180 * new value automatically.
1184 fnlen = strlen(fnamep);
1185 if ( fnamep[fnlen-1] == '.') {
1186 fnamep[fnlen-1] = '\0';
1191 if (cnamep[0] == '.') {
1192 if (cm_GetCell_Gen(&fnamep[1], &fullname[1], CM_FLAG_CREATE)) {
1194 code = cm_FreelanceAddMount(fullname, &fullname[1], "root.cell", 1, &rock.fid);
1195 if ( cm_FsStrCmpI(&fnamep[1], &fullname[1])) {
1197 * Do not permit symlinks that are one of:
1198 * . the cellname followed by a dot
1199 * . the cellname minus a single character
1200 * . a substring of the cellname that does not consist of full components
1202 if ( cm_strnicmp_utf8(&fnamep[1], fullname, (int)fnlen-1) == 0 &&
1203 (fnlen-1 == strlen(fullname)-1 || fullname[fnlen-1] != '.'))
1205 /* do not add; substitute fullname for the search */
1207 fnamep = malloc(strlen(fullname)+2);
1209 strncpy(&fnamep[1], fullname, strlen(fullname)+1);
1212 code = cm_FreelanceAddSymlink(fnamep, fullname, &rock.fid);
1217 if (cm_GetCell_Gen(fnamep, fullname, CM_FLAG_CREATE)) {
1219 code = cm_FreelanceAddMount(fullname, fullname, "root.cell", 0, &rock.fid);
1220 if ( cm_FsStrCmpI(fnamep, fullname)) {
1222 * Do not permit symlinks that are one of:
1223 * . the cellname followed by a dot
1224 * . the cellname minus a single character
1225 * . a substring of the cellname that does not consist of full components
1227 if ( cm_strnicmp_utf8(fnamep, fullname, (int)fnlen-1) == 0 &&
1228 (fnlen == strlen(fullname)-1 || fullname[fnlen] != '.'))
1230 /* do not add; substitute fullname for the search */
1232 fnamep = strdup(fullname);
1236 code = cm_FreelanceAddSymlink(fnamep, fullname, &rock.fid);
1245 nnamep = cm_FsStringToNormStringAlloc(fnamep, -1, NULL);
1249 if (!found || code) { /* add mount point failed, so give up */
1250 if (flags & CM_FLAG_CHECKPATH)
1251 code = CM_ERROR_NOSUCHPATH;
1253 code = CM_ERROR_NOSUCHFILE;
1256 tscp = NULL; /* to force call of cm_GetSCache */
1258 if (flags & CM_FLAG_CHECKPATH)
1259 code = CM_ERROR_NOSUCHPATH;
1261 code = CM_ERROR_NOSUCHFILE;
1267 if ( !tscp ) /* we did not find it in the dnlc */
1270 code = cm_GetSCache(&rock.fid, &tscp, userp, reqp);
1274 /* tscp is now held */
1276 lock_ObtainWrite(&tscp->rw);
1279 * Do not get status if we do not already have a callback.
1280 * The process of reading the mount point string will obtain status information
1281 * in a single RPC. No reason to add a second round trip.
1283 * If we do have a callback, use cm_SyncOp to get status in case the
1284 * current cm_user_t is not the same as the one that obtained the
1285 * mount point string contents.
1287 if (cm_HaveCallback(tscp)) {
1288 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
1289 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
1291 lock_ReleaseWrite(&tscp->rw);
1292 cm_ReleaseSCache(tscp);
1295 cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
1297 /* tscp is now locked */
1299 if (!(flags & CM_FLAG_NOMOUNTCHASE)
1300 && tscp->fileType == CM_SCACHETYPE_MOUNTPOINT) {
1301 /* mount points are funny: they have a volume name to mount
1304 code = cm_ReadMountPoint(tscp, userp, reqp);
1306 code = cm_FollowMountPoint(tscp, dscp, userp, reqp,
1308 lock_ReleaseWrite(&tscp->rw);
1309 cm_ReleaseSCache(tscp);
1316 lock_ReleaseWrite(&tscp->rw);
1319 /* copy back pointer */
1322 /* insert scache in dnlc */
1323 if ( !dnlcHit && !(flags & CM_FLAG_NOMOUNTCHASE) && rock.ExactFound ) {
1324 /* lock the directory entry to prevent racing callback revokes */
1325 lock_ObtainRead(&dscp->rw);
1326 if ( dscp->cbServerp != NULL && dscp->cbExpires > 0 ) {
1327 /* TODO: reuse nnamep from above */
1330 nnamep = cm_ClientStringToNormStringAlloc(cnamep, -1, NULL);
1332 cm_dnlcEnter(dscp, nnamep, tscp);
1334 lock_ReleaseRead(&dscp->rw);
1351 int cm_ExpandSysName(cm_req_t * reqp, clientchar_t *inp, clientchar_t *outp, long outSizeCch, unsigned int index)
1356 int use_sysname64 = 0;
1358 if (cm_sysName64Count > 0 && reqp && (reqp->flags & CM_REQ_WOW64) && (reqp->flags & CM_REQ_SOURCE_REDIR))
1362 tp = cm_ClientStrRChr(inp, '@');
1364 return 0; /* no @sys */
1366 if (cm_ClientStrCmp(tp, _C("@sys")) != 0)
1367 return 0; /* no @sys */
1369 /* caller just wants to know if this is a valid @sys type of name */
1374 if (use_sysname64 && index >= cm_sysName64Count)
1378 if (index >= cm_sysNameCount)
1381 /* otherwise generate the properly expanded @sys name */
1382 prefixCount = (int)(tp - inp);
1384 cm_ClientStrCpyN(outp, outSizeCch, inp, prefixCount); /* copy out "a." from "a.@sys" */
1385 outp[prefixCount] = 0; /* null terminate the "a." */
1388 cm_ClientStrCat(outp, outSizeCch, cm_sysName64List[index]);
1391 cm_ClientStrCat(outp, outSizeCch, cm_sysNameList[index]);
1396 long cm_EvaluateVolumeReference(clientchar_t * namep, long flags, cm_user_t * userp,
1397 cm_req_t *reqp, cm_scache_t ** outScpp)
1399 afs_uint32 code = 0;
1400 fschar_t cellName[CELL_MAXNAMELEN];
1401 fschar_t volumeName[VL_MAXNAMELEN];
1405 fschar_t * fnamep = NULL;
1407 cm_cell_t * cellp = NULL;
1408 cm_volume_t * volp = NULL;
1412 int mountType = RWVOL;
1414 osi_Log1(afsd_logp, "cm_EvaluateVolumeReference for string [%S]",
1415 osi_LogSaveClientString(afsd_logp, namep));
1417 if (cm_ClientStrCmpNI(namep, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH) != 0) {
1418 goto _exit_invalid_path;
1421 /* namep is assumed to look like the following:
1423 @vol:<cellname>%<volume>\0
1425 @vol:<cellname>#<volume>\0
1429 fnamep = cm_ClientStringToFsStringAlloc(namep, -1, NULL);
1430 cp = fnamep + CM_PREFIX_VOL_CCH; /* cp points to cell name, hopefully */
1431 tp = cm_FsStrChr(cp, '%');
1433 tp = cm_FsStrChr(cp, '#');
1435 (len = tp - cp) == 0 ||
1436 len > CELL_MAXNAMELEN)
1437 goto _exit_invalid_path;
1438 cm_FsStrCpyN(cellName, lengthof(cellName), cp, len);
1443 cp = tp+1; /* cp now points to volume, supposedly */
1444 cm_FsStrCpy(volumeName, lengthof(volumeName), cp);
1446 /* OK, now we have the cell and the volume */
1447 osi_Log2(afsd_logp, " Found cell [%s] and volume [%s]",
1448 osi_LogSaveFsString(afsd_logp, cellName),
1449 osi_LogSaveFsString(afsd_logp, volumeName));
1451 cellp = cm_GetCell(cellName, CM_FLAG_CREATE);
1452 if (cellp == NULL) {
1453 goto _exit_invalid_path;
1456 len = cm_FsStrLen(volumeName);
1457 if (len >= 8 && cm_FsStrCmp(volumeName + len - 7, ".backup") == 0)
1459 else if (len >= 10 &&
1460 cm_FsStrCmp(volumeName + len - 9, ".readonly") == 0)
1465 if (cm_VolNameIsID(volumeName)) {
1466 code = cm_FindVolumeByID(cellp, atoi(volumeName), userp, reqp,
1467 CM_GETVOL_FLAG_CREATE, &volp);
1469 code = cm_FindVolumeByName(cellp, volumeName, userp, reqp,
1470 CM_GETVOL_FLAG_CREATE, &volp);
1476 if (volType == BACKVOL)
1477 volume = volp->vol[BACKVOL].ID;
1478 else if (volType == ROVOL ||
1479 (volType == RWVOL && mountType == ROVOL && volp->vol[ROVOL].ID != 0))
1480 volume = volp->vol[ROVOL].ID;
1482 volume = volp->vol[RWVOL].ID;
1484 cm_SetFid(&fid, cellp->cellID, volume, 1, 1);
1486 code = cm_GetSCache(&fid, outScpp, userp, reqp);
1499 if (flags & CM_FLAG_CHECKPATH)
1500 return CM_ERROR_NOSUCHPATH;
1502 return CM_ERROR_NOSUCHFILE;
1505 #ifdef DEBUG_REFCOUNT
1506 long cm_LookupDbg(cm_scache_t *dscp, clientchar_t *namep, long flags, cm_user_t *userp,
1507 cm_req_t *reqp, cm_scache_t **outScpp, char * file, long line)
1509 long cm_Lookup(cm_scache_t *dscp, clientchar_t *namep, long flags, cm_user_t *userp,
1510 cm_req_t *reqp, cm_scache_t **outScpp)
1514 clientchar_t tname[AFSPATHMAX];
1515 int sysNameIndex = 0;
1516 cm_scache_t *scp = NULL;
1518 #ifdef DEBUG_REFCOUNT
1519 afsi_log("%s:%d cm_Lookup dscp 0x%p ref %d", file, line, dscp, dscp->refCount, file, line);
1520 osi_Log2(afsd_logp, "cm_Lookup dscp 0x%p ref %d", dscp, dscp->refCount);
1523 if ( cm_ClientStrCmpI(namep,_C(SMB_IOCTL_FILENAME_NOSLASH)) == 0 ) {
1524 if (flags & CM_FLAG_CHECKPATH)
1525 return CM_ERROR_NOSUCHPATH;
1527 return CM_ERROR_NOSUCHFILE;
1530 if (dscp == cm_data.rootSCachep &&
1531 cm_ClientStrCmpNI(namep, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH) == 0) {
1532 return cm_EvaluateVolumeReference(namep, flags, userp, reqp, outScpp);
1535 if (cm_ExpandSysName(reqp, namep, NULL, 0, 0) > 0) {
1536 for ( sysNameIndex = 0; sysNameIndex < MAXNUMSYSNAMES; sysNameIndex++) {
1537 code = cm_ExpandSysName(reqp, namep, tname, lengthof(tname), sysNameIndex);
1539 code = cm_LookupInternal(dscp, tname, flags, userp, reqp, &scp);
1540 #ifdef DEBUG_REFCOUNT
1541 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);
1542 osi_Log3(afsd_logp, "cm_LookupInternal (1) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1550 cm_ReleaseSCache(scp);
1554 code = cm_LookupInternal(dscp, namep, flags, userp, reqp, &scp);
1555 #ifdef DEBUG_REFCOUNT
1556 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);
1557 osi_Log3(afsd_logp, "cm_LookupInternal (2) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1564 code = cm_LookupInternal(dscp, namep, flags, userp, reqp, &scp);
1565 #ifdef DEBUG_REFCOUNT
1566 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);
1567 osi_Log3(afsd_logp, "cm_LookupInternal (2) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1573 /* None of the possible sysName expansions could be found */
1574 if (flags & CM_FLAG_CHECKPATH)
1575 return CM_ERROR_NOSUCHPATH;
1577 return CM_ERROR_NOSUCHFILE;
1580 /*! \brief Unlink a file name
1582 Encapsulates a call to RXAFS_RemoveFile().
1584 \param[in] dscp cm_scache_t pointing at the directory containing the
1585 name to be unlinked.
1587 \param[in] fnamep Original name to be unlinked. This is the
1588 name that will be passed into the RXAFS_RemoveFile() call.
1589 This parameter is optional. If not provided, the value will
1592 \param[in] came Client name to be unlinked. This name will be used
1593 to update the local directory caches.
1595 \param[in] userp cm_user_t for the request.
1597 \param[in] reqp Request tracker.
1600 long cm_Unlink(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t * cnamep,
1601 cm_user_t *userp, cm_req_t *reqp)
1607 AFSFetchStatus newDirStatus;
1609 struct rx_connection * rxconnp;
1611 cm_scache_t *scp = NULL;
1612 int free_fnamep = FALSE;
1615 memset(&volSync, 0, sizeof(volSync));
1617 if (fnamep == NULL) {
1620 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
1621 CM_DIROP_FLAG_NONE, &dirop);
1623 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
1626 cm_EndDirOp(&dirop);
1633 #ifdef AFS_FREELANCE_CLIENT
1634 if (cm_freelanceEnabled && dscp == cm_data.rootSCachep) {
1635 /* deleting a mount point from the root dir. */
1636 code = cm_FreelanceRemoveMount(fnamep);
1641 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
1645 /* Check for RO volume */
1646 if (dscp->flags & CM_SCACHEFLAG_RO) {
1647 code = CM_ERROR_READONLY;
1651 /* make sure we don't screw up the dir status during the merge */
1652 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE,
1653 CM_DIROP_FLAG_NONE, &dirop);
1655 lock_ObtainWrite(&dscp->rw);
1656 sflags = CM_SCACHESYNC_STOREDATA;
1657 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, sflags);
1658 lock_ReleaseWrite(&dscp->rw);
1660 cm_EndDirOp(&dirop);
1665 InterlockedIncrement(&dscp->activeRPCs);
1667 afsFid.Volume = dscp->fid.volume;
1668 afsFid.Vnode = dscp->fid.vnode;
1669 afsFid.Unique = dscp->fid.unique;
1671 osi_Log1(afsd_logp, "CALL RemoveFile scp 0x%p", dscp);
1673 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
1677 rxconnp = cm_GetRxConn(connp);
1678 code = RXAFS_RemoveFile(rxconnp, &afsFid, fnamep,
1679 &newDirStatus, &volSync);
1680 rx_PutConnection(rxconnp);
1682 } while (cm_Analyze(connp, userp, reqp, &dscp->fid, &volSync, NULL, NULL, code));
1683 code = cm_MapRPCError(code, reqp);
1686 osi_Log1(afsd_logp, "CALL RemoveFile FAILURE, code 0x%x", code);
1688 osi_Log0(afsd_logp, "CALL RemoveFile SUCCESS");
1691 lock_ObtainWrite(&dirop.scp->dirlock);
1692 dirop.lockType = CM_DIRLOCK_WRITE;
1694 lock_ObtainWrite(&dscp->rw);
1695 cm_dnlcRemove(dscp, cnamep);
1697 cm_MergeStatus(NULL, dscp, &newDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
1699 if (cm_CheckDirOpForSingleChange(&dirop) && cnamep) {
1700 lock_ReleaseWrite(&dscp->rw);
1701 cm_DirDeleteEntry(&dirop, fnamep);
1703 cm_BPlusDirDeleteEntry(&dirop, cnamep);
1705 lock_ObtainWrite(&dscp->rw);
1708 InterlockedDecrement(&scp->activeRPCs);
1709 if (code == CM_ERROR_NOSUCHFILE) {
1710 /* windows would not have allowed the request to delete the file
1711 * if it did not believe the file existed. therefore, we must
1712 * have an inconsistent view of the world.
1714 dscp->cbServerp = NULL;
1718 cm_SyncOpDone(dscp, NULL, sflags);
1719 lock_ReleaseWrite(&dscp->rw);
1721 cm_EndDirOp(&dirop);
1723 if (invalidate && RDR_Initialized &&
1724 scp->fileType != CM_SCACHETYPE_FILE && scp->fileType != CM_SCACHETYPE_DIRECTORY)
1725 RDR_InvalidateObject(dscp->fid.cell, dscp->fid.volume, dscp->fid.vnode,
1726 dscp->fid.unique, dscp->fid.hash,
1727 dscp->fileType, AFS_INVALIDATE_DATA_VERSION);
1730 cm_ReleaseSCache(scp);
1732 lock_ObtainWrite(&scp->rw);
1733 if (--scp->linkCount == 0) {
1734 scp->flags |= CM_SCACHEFLAG_DELETED;
1735 lock_ObtainWrite(&cm_scacheLock);
1736 cm_AdjustScacheLRU(scp);
1737 cm_RemoveSCacheFromHashTable(scp);
1738 lock_ReleaseWrite(&cm_scacheLock);
1740 cm_DiscardSCache(scp);
1741 lock_ReleaseWrite(&scp->rw);
1742 if (RDR_Initialized && !(reqp->flags & CM_REQ_SOURCE_REDIR) &&
1743 !RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode,
1744 scp->fid.unique, scp->fid.hash,
1745 scp->fileType, AFS_INVALIDATE_DELETED))
1746 buf_ClearRDRFlag(scp, "unlink");
1757 /* called with a write locked vnode, and fills in the link info.
1758 * returns this the vnode still write locked.
1760 long cm_HandleLink(cm_scache_t *linkScp, cm_user_t *userp, cm_req_t *reqp)
1764 lock_AssertWrite(&linkScp->rw);
1765 if (!linkScp->mountPointStringp[0]) {
1767 #ifdef AFS_FREELANCE_CLIENT
1768 /* File servers do not have data for freelance entries */
1769 if (cm_freelanceEnabled &&
1770 linkScp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1771 linkScp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
1773 code = cm_FreelanceFetchMountPointString(linkScp);
1775 #endif /* AFS_FREELANCE_CLIENT */
1777 char temp[MOUNTPOINTLEN];
1780 /* read the link data from the file server */
1781 offset.LowPart = offset.HighPart = 0;
1782 code = cm_GetData(linkScp, &offset, temp, MOUNTPOINTLEN, userp, reqp);
1787 * linkScp->length is the actual length of the symlink target string.
1788 * It is current because cm_GetData merged the most up to date
1789 * status info into scp and has not dropped the rwlock since.
1791 if (linkScp->length.LowPart > MOUNTPOINTLEN - 1)
1792 return CM_ERROR_TOOBIG;
1793 if (linkScp->length.LowPart == 0)
1794 return CM_ERROR_INVAL;
1796 /* make sure we are NUL terminated */
1797 temp[linkScp->length.LowPart] = 0;
1798 memcpy(linkScp->mountPointStringp, temp, linkScp->length.LowPart + 1);
1801 if ( !strnicmp(linkScp->mountPointStringp, "msdfs:", strlen("msdfs:")) )
1802 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1804 } /* don't have symlink contents cached */
1809 /* called with a held vnode and a path suffix, with the held vnode being a
1810 * symbolic link. Our goal is to generate a new path to interpret, and return
1811 * this new path in newSpaceBufferp. If the new vnode is relative to a dir
1812 * other than the directory containing the symbolic link, then the new root is
1813 * returned in *newRootScpp, otherwise a null is returned there.
1815 long cm_AssembleLink(cm_scache_t *linkScp, fschar_t *pathSuffixp,
1816 cm_scache_t **newRootScpp, cm_space_t **newSpaceBufferp,
1817 cm_user_t *userp, cm_req_t *reqp)
1824 *newRootScpp = NULL;
1825 *newSpaceBufferp = NULL;
1827 lock_ObtainWrite(&linkScp->rw);
1829 * Do not get status if we do not already have a callback.
1830 * The process of reading the symlink string will obtain status information
1831 * in a single RPC. No reason to add a second round trip.
1833 * If we do have a callback, use cm_SyncOp to get status in case the
1834 * current cm_user_t is not the same as the one that obtained the
1835 * symlink string contents.
1837 if (cm_HaveCallback(linkScp)) {
1838 code = cm_SyncOp(linkScp, NULL, userp, reqp, 0,
1839 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
1841 lock_ReleaseWrite(&linkScp->rw);
1842 cm_ReleaseSCache(linkScp);
1845 cm_SyncOpDone(linkScp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
1847 code = cm_HandleLink(linkScp, userp, reqp);
1851 /* if we may overflow the buffer, bail out; buffer is signficantly
1852 * bigger than max path length, so we don't really have to worry about
1853 * being a little conservative here.
1855 if (cm_FsStrLen(linkScp->mountPointStringp) + cm_FsStrLen(pathSuffixp) + 2
1856 >= CM_UTILS_SPACESIZE) {
1857 code = CM_ERROR_TOOBIG;
1861 tsp = cm_GetSpace();
1862 linkp = linkScp->mountPointStringp;
1863 if (strncmp(linkp, cm_mountRoot, cm_mountRootLen) == 0) {
1864 if (strlen(linkp) > cm_mountRootLen)
1865 StringCbCopyA((char *) tsp->data, sizeof(tsp->data), linkp+cm_mountRootLen+1);
1868 *newRootScpp = cm_RootSCachep(userp, reqp);
1869 cm_HoldSCache(*newRootScpp);
1870 } else if (linkp[0] == '\\' && linkp[1] == '\\') {
1871 if (!strnicmp(&linkp[2], cm_NetbiosName, (len = (long)strlen(cm_NetbiosName))))
1873 char * p = &linkp[len + 3];
1874 if (strnicmp(p, "all", 3) == 0)
1877 StringCbCopyA(tsp->data, sizeof(tsp->data), p);
1878 for (p = tsp->data; *p; p++) {
1882 *newRootScpp = cm_RootSCachep(userp, reqp);
1883 cm_HoldSCache(*newRootScpp);
1885 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1886 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1887 code = CM_ERROR_PATH_NOT_COVERED;
1889 } else if ( linkScp->fileType == CM_SCACHETYPE_DFSLINK ||
1890 !strnicmp(linkp, "msdfs:", (len = (long)strlen("msdfs:"))) ) {
1891 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1892 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1893 code = CM_ERROR_PATH_NOT_COVERED;
1894 } else if (*linkp == '\\' || *linkp == '/') {
1896 /* formerly, this was considered to be from the AFS root,
1897 * but this seems to create problems. instead, we will just
1898 * reject the link */
1899 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp+1);
1900 *newRootScpp = cm_RootSCachep(userp, reqp);
1901 cm_HoldSCache(*newRootScpp);
1903 /* we still copy the link data into the response so that
1904 * the user can see what the link points to
1906 linkScp->fileType = CM_SCACHETYPE_INVALID;
1907 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1908 code = CM_ERROR_NOSUCHPATH;
1911 /* a relative link */
1912 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1914 if (pathSuffixp[0] != 0) { /* if suffix string is non-null */
1915 StringCchCatA(tsp->data,lengthof(tsp->data), "\\");
1916 StringCchCatA(tsp->data,lengthof(tsp->data), pathSuffixp);
1920 clientchar_t * cpath = cm_FsStringToClientStringAlloc(tsp->data, -1, NULL);
1921 if (cpath != NULL) {
1922 cm_ClientStrCpy(tsp->wdata, lengthof(tsp->wdata), cpath);
1924 *newSpaceBufferp = tsp;
1926 code = CM_ERROR_NOSUCHPATH;
1933 if (code == CM_ERROR_PATH_NOT_COVERED && reqp->tidPathp && reqp->relPathp) {
1934 cm_VolStatus_Notify_DFS_Mapping(linkScp, reqp->tidPathp, reqp->relPathp);
1939 lock_ReleaseWrite(&linkScp->rw);
1942 #ifdef DEBUG_REFCOUNT
1943 long cm_NameIDbg(cm_scache_t *rootSCachep, clientchar_t *pathp, long flags,
1944 cm_user_t *userp, clientchar_t *tidPathp, cm_req_t *reqp,
1945 cm_scache_t **outScpp,
1946 char * file, long line)
1948 long cm_NameI(cm_scache_t *rootSCachep, clientchar_t *pathp, long flags,
1949 cm_user_t *userp, clientchar_t *tidPathp,
1950 cm_req_t *reqp, cm_scache_t **outScpp)
1954 clientchar_t *tp; /* ptr moving through input buffer */
1955 clientchar_t tc; /* temp char */
1956 int haveComponent; /* has new component started? */
1957 clientchar_t component[AFSPATHMAX]; /* this is the new component */
1958 clientchar_t *cp; /* component name being assembled */
1959 cm_scache_t *tscp; /* current location in the hierarchy */
1960 cm_scache_t *nscp; /* next dude down */
1961 cm_scache_t *dirScp; /* last dir we searched */
1962 cm_scache_t *linkScp; /* new root for the symlink we just
1964 cm_space_t *psp; /* space for current path, if we've hit
1966 cm_space_t *tempsp; /* temp vbl */
1967 clientchar_t *restp; /* rest of the pathname to interpret */
1968 int symlinkCount; /* count of # of symlinks traversed */
1969 int extraFlag; /* avoid chasing mt pts for dir cmd */
1970 int phase = 1; /* 1 = tidPathp, 2 = pathp */
1971 #define MAX_FID_COUNT 512
1972 cm_fid_t fids[MAX_FID_COUNT]; /* array of fids processed in this path walk */
1973 int fid_count = 0; /* number of fids processed in this path walk */
1978 #ifdef DEBUG_REFCOUNT
1979 afsi_log("%s:%d cm_NameI rootscp 0x%p ref %d", file, line, rootSCachep, rootSCachep->refCount);
1980 osi_Log4(afsd_logp,"cm_NameI rootscp 0x%p path %S tidpath %S flags 0x%x",
1981 rootSCachep, pathp ? pathp : L"<NULL>", tidPathp ? tidPathp : L"<NULL>",
1996 cm_HoldSCache(tscp);
2004 /* map Unix slashes into DOS ones so we can interpret Unix
2010 if (!haveComponent) {
2013 } else if (tc == 0) {
2027 /* we have a component here */
2028 if (tc == 0 || tc == '\\') {
2029 /* end of the component; we're at the last
2030 * component if tc == 0. However, if the last
2031 * is a symlink, we have more to do.
2033 *cp++ = 0; /* add null termination */
2035 if ((flags & CM_FLAG_DIRSEARCH) && tc == 0)
2036 extraFlag = CM_FLAG_NOMOUNTCHASE;
2037 code = cm_Lookup(tscp, component,
2039 userp, reqp, &nscp);
2042 if (!cm_ClientStrCmp(component,_C("..")) ||
2043 !cm_ClientStrCmp(component,_C("."))) {
2045 * roll back the fid list until we find the
2046 * fid that matches where we are now. Its not
2047 * necessarily one or two fids because they
2048 * might have been symlinks or mount points or
2049 * both that were crossed.
2051 for ( i=fid_count-1; i>=0; i--) {
2052 if (!cm_FidCmp(&nscp->fid, &fids[i]))
2057 /* add the new fid to the list */
2058 if (fid_count == MAX_FID_COUNT) {
2059 code = CM_ERROR_TOO_MANY_SYMLINKS;
2060 cm_ReleaseSCache(nscp);
2064 fids[fid_count++] = nscp->fid;
2069 cm_ReleaseSCache(tscp);
2071 cm_ReleaseSCache(dirScp);
2074 if ((code == CM_ERROR_NOSUCHFILE || code == CM_ERROR_BPLUS_NOMATCH) &&
2075 tscp->fileType == CM_SCACHETYPE_SYMLINK) {
2076 osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_NOSUCHPATH");
2077 return CM_ERROR_NOSUCHPATH;
2079 osi_Log1(afsd_logp,"cm_NameI code 0x%x", code);
2084 haveComponent = 0; /* component done */
2086 cm_ReleaseSCache(dirScp);
2087 dirScp = tscp; /* for some symlinks */
2088 tscp = nscp; /* already held */
2090 if (tc == 0 && !(flags & CM_FLAG_FOLLOW) && phase == 2) {
2093 cm_ReleaseSCache(dirScp);
2099 /* now, if tscp is a symlink, we should follow it and
2100 * assemble the path again.
2102 lock_ObtainWrite(&tscp->rw);
2103 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
2104 CM_SCACHESYNC_GETSTATUS
2105 | CM_SCACHESYNC_NEEDCALLBACK);
2107 lock_ReleaseWrite(&tscp->rw);
2108 cm_ReleaseSCache(tscp);
2111 cm_ReleaseSCache(dirScp);
2116 cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2118 if (tscp->fileType == CM_SCACHETYPE_SYMLINK) {
2119 /* this is a symlink; assemble a new buffer */
2120 lock_ReleaseWrite(&tscp->rw);
2121 if (symlinkCount++ >= MAX_SYMLINK_COUNT) {
2122 cm_ReleaseSCache(tscp);
2125 cm_ReleaseSCache(dirScp);
2130 osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_TOO_MANY_SYMLINKS");
2131 return CM_ERROR_TOO_MANY_SYMLINKS;
2141 /* TODO: make this better */
2142 frestp = cm_ClientStringToFsStringAlloc(restp, -1, NULL);
2143 code = cm_AssembleLink(tscp, frestp, &linkScp, &tempsp, userp, reqp);
2147 if (code == 0 && linkScp != NULL) {
2148 if (linkScp == cm_data.rootSCachep) {
2152 for ( i=0; i<fid_count; i++) {
2153 if ( !cm_FidCmp(&linkScp->fid, &fids[i]) ) {
2154 code = CM_ERROR_TOO_MANY_SYMLINKS;
2155 cm_ReleaseSCache(linkScp);
2161 if (i == fid_count && fid_count < MAX_FID_COUNT) {
2162 fids[fid_count++] = linkScp->fid;
2167 /* something went wrong */
2168 cm_ReleaseSCache(tscp);
2171 cm_ReleaseSCache(dirScp);
2177 /* otherwise, tempsp has the new path,
2178 * and linkScp is the new root from
2179 * which to interpret that path.
2180 * Continue with the namei processing,
2181 * also doing the bookkeeping for the
2182 * space allocation and tracking the
2183 * vnode reference counts.
2189 cm_ReleaseSCache(tscp);
2194 * now, if linkScp is null, that's
2195 * AssembleLink's way of telling us that
2196 * the sym link is relative to the dir
2197 * containing the link. We have a ref
2198 * to it in dirScp, and we hold it now
2199 * and reuse it as the new spot in the
2207 /* not a symlink, we may be done */
2208 lock_ReleaseWrite(&tscp->rw);
2216 cm_ReleaseSCache(dirScp);
2224 cm_ReleaseSCache(dirScp);
2227 } /* end of a component */
2230 } /* we have a component */
2231 } /* big while loop over all components */
2235 cm_ReleaseSCache(dirScp);
2241 cm_ReleaseSCache(tscp);
2243 #ifdef DEBUG_REFCOUNT
2244 afsi_log("%s:%d cm_NameI code 0x%x outScpp 0x%p ref %d", file, line, code, *outScpp, (*outScpp) ? (*outScpp)->refCount : 0);
2246 osi_Log2(afsd_logp,"cm_NameI code 0x%x outScpp 0x%p", code, *outScpp);
2250 /* called with a dir, and a vnode within the dir that happens to be a symlink.
2251 * We chase the link, and return a held pointer to the target, if it exists,
2252 * in *outScpp. If we succeed, we return 0, otherwise we return an error code
2253 * and do not hold or return a target vnode.
2255 * This is very similar to calling cm_NameI with the last component of a name,
2256 * which happens to be a symlink, except that we've already passed by the name.
2258 * This function is typically called by the directory listing functions, which
2259 * encounter symlinks but need to return the proper file length so programs
2260 * like "more" work properly when they make use of the attributes retrieved from
2263 * The input vnode should not be locked when this function is called.
2265 long cm_EvaluateSymLink(cm_scache_t *dscp, cm_scache_t *linkScp,
2266 cm_scache_t **outScpp, cm_user_t *userp, cm_req_t *reqp)
2270 cm_scache_t *newRootScp;
2274 osi_Log1(afsd_logp, "Evaluating symlink scp 0x%p", linkScp);
2276 code = cm_AssembleLink(linkScp, "", &newRootScp, &spacep, userp, reqp);
2280 /* now, if newRootScp is NULL, we're really being told that the symlink
2281 * is relative to the current directory (dscp).
2283 if (newRootScp == NULL) {
2285 cm_HoldSCache(dscp);
2288 code = cm_NameI(newRootScp, spacep->wdata,
2289 CM_FLAG_CASEFOLD | CM_FLAG_FOLLOW | CM_FLAG_DIRSEARCH,
2290 userp, NULL, reqp, outScpp);
2292 if (code == CM_ERROR_NOSUCHFILE || code == CM_ERROR_BPLUS_NOMATCH)
2293 code = CM_ERROR_NOSUCHPATH;
2295 /* this stuff is allocated no matter what happened on the namei call,
2297 cm_FreeSpace(spacep);
2298 cm_ReleaseSCache(newRootScp);
2300 if (linkScp == *outScpp) {
2301 cm_ReleaseSCache(*outScpp);
2303 code = CM_ERROR_NOSUCHPATH;
2309 /* for a given entry, make sure that it isn't in the stat cache, and then
2310 * add it to the list of file IDs to be obtained.
2312 * Don't bother adding it if we already have a vnode. Note that the dir
2313 * is locked, so we have to be careful checking the vnode we're thinking of
2314 * processing, to avoid deadlocks.
2316 long cm_TryBulkProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
2327 /* Don't overflow bsp. */
2328 if (bsp->counter >= CM_BULKMAX)
2329 return CM_ERROR_STOPNOW;
2331 thyper.LowPart = cm_data.buf_blockSize;
2332 thyper.HighPart = 0;
2333 thyper = LargeIntegerAdd(thyper, bsp->bufOffset);
2335 /* thyper is now the first byte past the end of the record we're
2336 * interested in, and bsp->bufOffset is the first byte of the record
2337 * we're interested in.
2338 * Skip data in the others.
2341 if (LargeIntegerLessThan(*offp, bsp->bufOffset))
2343 if (LargeIntegerGreaterThanOrEqualTo(*offp, thyper))
2344 return CM_ERROR_STOPNOW;
2345 if (strcmp(dep->name, ".") == 0 || strcmp(dep->name, "..") == 0)
2348 cm_SetFid(&tfid, scp->fid.cell, scp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
2349 tscp = cm_FindSCache(&tfid);
2351 if (lock_TryWrite(&tscp->rw)) {
2352 /* we have an entry that we can look at */
2353 if (!(tscp->flags & CM_SCACHEFLAG_EACCESS) && cm_HaveCallback(tscp)) {
2354 /* we have a callback on it. Don't bother
2355 * fetching this stat entry, since we're happy
2356 * with the info we have.
2358 lock_ReleaseWrite(&tscp->rw);
2359 cm_ReleaseSCache(tscp);
2362 lock_ReleaseWrite(&tscp->rw);
2364 cm_ReleaseSCache(tscp);
2367 #ifdef AFS_FREELANCE_CLIENT
2368 // yj: if this is a mountpoint under root.afs then we don't want it
2369 // to be bulkstat-ed, instead, we call getSCache directly and under
2370 // getSCache, it is handled specially.
2371 if ( cm_freelanceEnabled &&
2372 tfid.cell==AFS_FAKE_ROOT_CELL_ID &&
2373 tfid.volume==AFS_FAKE_ROOT_VOL_ID &&
2374 !(tfid.vnode==0x1 && tfid.unique==0x1) )
2376 osi_Log0(afsd_logp, "cm_TryBulkProc Freelance calls cm_SCache on root.afs mountpoint");
2377 return cm_GetSCache(&tfid, &tscp, NULL, NULL);
2379 #endif /* AFS_FREELANCE_CLIENT */
2382 bsp->fids[i].Volume = scp->fid.volume;
2383 bsp->fids[i].Vnode = tfid.vnode;
2384 bsp->fids[i].Unique = tfid.unique;
2389 cm_TryBulkStatRPC(cm_scache_t *dscp, cm_bulkStat_t *bbp, cm_user_t *userp, cm_req_t *reqp)
2392 AFSCBFids fidStruct;
2393 AFSBulkStats statStruct;
2395 AFSCBs callbackStruct;
2398 cm_callbackRequest_t cbReq;
2404 struct rx_connection * rxconnp;
2405 int inlinebulk; /* Did we use InlineBulkStatus RPC or not? */
2407 memset(&volSync, 0, sizeof(volSync));
2409 /* otherwise, we may have one or more bulk stat's worth of stuff in bb;
2410 * make the calls to create the entries. Handle AFSCBMAX files at a
2413 for (filex = 0; filex < bbp->counter; filex += filesThisCall) {
2414 filesThisCall = bbp->counter - filex;
2415 if (filesThisCall > AFSCBMAX)
2416 filesThisCall = AFSCBMAX;
2418 fidStruct.AFSCBFids_len = filesThisCall;
2419 fidStruct.AFSCBFids_val = &bbp->fids[filex];
2420 statStruct.AFSBulkStats_len = filesThisCall;
2421 statStruct.AFSBulkStats_val = &bbp->stats[filex];
2422 callbackStruct.AFSCBs_len = filesThisCall;
2423 callbackStruct.AFSCBs_val = &bbp->callbacks[filex];
2424 cm_StartCallbackGrantingCall(NULL, &cbReq);
2425 osi_Log1(afsd_logp, "CALL BulkStatus, %d entries", filesThisCall);
2428 * Whenever cm_Analyze is called for a RXAFS_ RPC there must
2429 * be a FID provided. However, the error code from RXAFS_BulkStatus
2430 * or RXAFS_InlinkBulkStatus does not apply to any FID. Therefore,
2431 * we generate an invalid FID to match with the RPC error.
2433 cm_SetFid(&tfid, dscp->fid.cell, dscp->fid.volume, 0, 0);
2438 code = cm_ConnFromFID(&tfid, userp, reqp, &connp);
2442 rxconnp = cm_GetRxConn(connp);
2443 if (!(connp->serverp->flags & CM_SERVERFLAG_NOINLINEBULK)) {
2444 code = RXAFS_InlineBulkStatus(rxconnp, &fidStruct,
2445 &statStruct, &callbackStruct, &volSync);
2446 if (code == RXGEN_OPCODE) {
2447 cm_SetServerNoInlineBulk(connp->serverp, 0);
2453 code = RXAFS_BulkStatus(rxconnp, &fidStruct,
2454 &statStruct, &callbackStruct, &volSync);
2456 rx_PutConnection(rxconnp);
2459 * If InlineBulk RPC was called and it succeeded,
2460 * then pull out the return code from the status info
2461 * and use it for cm_Analyze so that we can failover to other
2462 * .readonly volume instances. But only do it for errors that
2463 * are volume global.
2465 if (inlinebulk && code == 0 && (&bbp->stats[0])->errorCode) {
2466 osi_Log1(afsd_logp, "cm_TryBulkStat inline-bulk stat error: %d",
2467 (&bbp->stats[0])->errorCode);
2468 switch ((&bbp->stats[0])->errorCode) {
2477 code = (&bbp->stats[0])->errorCode;
2480 /* Rx and Rxkad errors are volume global */
2481 if ( (&bbp->stats[0])->errorCode >= -64 && (&bbp->stats[0])->errorCode < 0 ||
2482 (&bbp->stats[0])->errorCode >= ERROR_TABLE_BASE_RXK && (&bbp->stats[0])->errorCode < ERROR_TABLE_BASE_RXK + 256)
2483 code = (&bbp->stats[0])->errorCode;
2486 } while (cm_Analyze(connp, userp, reqp, &tfid, &volSync, NULL, &cbReq, code));
2487 code = cm_MapRPCError(code, reqp);
2490 * might as well quit on an error, since we're not going to do
2491 * much better on the next immediate call, either.
2494 osi_Log2(afsd_logp, "CALL %sBulkStatus FAILURE code 0x%x",
2495 inlinebulk ? "Inline" : "", code);
2496 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2501 * The bulk RPC has succeeded or at least not failed with a
2502 * volume global error result. For items that have inlineBulk
2503 * errors we must call cm_Analyze in order to perform required
2504 * logging of errors.
2506 * If the RPC was not inline bulk or the entry either has no error
2507 * the status must be merged.
2509 osi_Log1(afsd_logp, "CALL %sBulkStatus SUCCESS", inlinebulk ? "Inline" : "");
2511 for (i = 0; i<filesThisCall; i++) {
2513 cm_SetFid(&tfid, dscp->fid.cell, bbp->fids[j].Volume, bbp->fids[j].Vnode, bbp->fids[j].Unique);
2515 if (inlinebulk && (&bbp->stats[j])->errorCode) {
2516 cm_req_t treq = *reqp;
2517 cm_Analyze(NULL, userp, &treq, &tfid, &volSync, NULL, &cbReq, (&bbp->stats[j])->errorCode);
2519 code = cm_GetSCache(&tfid, &scp, userp, reqp);
2524 * otherwise, if this entry has no callback info,
2525 * merge in this. If there is existing callback info
2526 * we skip the merge because the existing data must be
2527 * current (we have a callback) and the response from
2528 * a non-inline bulk rpc might actually be wrong.
2530 * now, we have to be extra paranoid on merging in this
2531 * information, since we didn't use cm_SyncOp before
2532 * starting the fetch to make sure that no bad races
2533 * were occurring. Specifically, we need to make sure
2534 * we don't obliterate any newer information in the
2535 * vnode than have here.
2537 * Right now, be pretty conservative: if there's a
2538 * callback or a pending call, skip it.
2539 * However, if the prior attempt to obtain status
2540 * was refused access or the volume is .readonly,
2541 * take the data in any case since we have nothing
2542 * better for the in flight directory enumeration that
2543 * resulted in this function being called.
2545 lock_ObtainRead(&scp->rw);
2546 if ((scp->cbServerp == NULL &&
2547 !(scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESTORING))) ||
2548 (scp->flags & CM_SCACHEFLAG_PURERO) ||
2549 (scp->flags & CM_SCACHEFLAG_EACCESS))
2551 lock_ConvertRToW(&scp->rw);
2552 cm_EndCallbackGrantingCall(scp, &cbReq,
2555 CM_CALLBACK_MAINTAINCOUNT);
2556 InterlockedIncrement(&scp->activeRPCs);
2557 cm_MergeStatus(dscp, scp, &bbp->stats[j], &volSync, userp, reqp, 0);
2558 lock_ReleaseWrite(&scp->rw);
2560 lock_ReleaseRead(&scp->rw);
2562 cm_ReleaseSCache(scp);
2564 } /* all files in the response */
2565 /* now tell it to drop the count,
2566 * after doing the vnode processing above */
2567 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2568 } /* while there are still more files to process */
2573 /* called with a write locked scp and a pointer to a buffer. Make bulk stat
2574 * calls on all undeleted files in the page of the directory specified.
2577 cm_TryBulkStat(cm_scache_t *dscp, osi_hyper_t *offsetp, cm_user_t *userp,
2583 osi_Log1(afsd_logp, "cm_TryBulkStat dir 0x%p", dscp);
2585 /* should be on a buffer boundary */
2586 osi_assertx((offsetp->LowPart & (cm_data.buf_blockSize - 1)) == 0, "invalid offset");
2588 bbp = malloc(sizeof(cm_bulkStat_t));
2589 memset(bbp, 0, sizeof(cm_bulkStat_t));
2590 bbp->bufOffset = *offsetp;
2592 lock_ReleaseWrite(&dscp->rw);
2593 /* first, assemble the file IDs we need to stat */
2594 code = cm_ApplyDir(dscp, cm_TryBulkProc, (void *) bbp, offsetp, userp, reqp, NULL);
2596 /* if we failed, bail out early */
2597 if (code && code != CM_ERROR_STOPNOW) {
2599 lock_ObtainWrite(&dscp->rw);
2603 code = cm_TryBulkStatRPC(dscp, bbp, userp, reqp);
2604 osi_Log1(afsd_logp, "END cm_TryBulkStat code 0x%x", code);
2606 lock_ObtainWrite(&dscp->rw);
2611 void cm_StatusFromAttr(AFSStoreStatus *statusp, cm_scache_t *scp, cm_attr_t *attrp)
2615 /* initialize store back mask as inexpensive local variable */
2617 memset(statusp, 0, sizeof(AFSStoreStatus));
2619 /* copy out queued info from scache first, if scp passed in */
2621 if (scp->mask & CM_SCACHEMASK_CLIENTMODTIME) {
2622 statusp->ClientModTime = scp->clientModTime;
2623 mask |= AFS_SETMODTIME;
2624 scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
2629 /* now add in our locally generated request */
2630 if (attrp->mask & CM_ATTRMASK_CLIENTMODTIME) {
2631 statusp->ClientModTime = attrp->clientModTime;
2632 mask |= AFS_SETMODTIME;
2634 if (attrp->mask & CM_ATTRMASK_UNIXMODEBITS) {
2635 statusp->UnixModeBits = attrp->unixModeBits;
2636 mask |= AFS_SETMODE;
2638 if (attrp->mask & CM_ATTRMASK_OWNER) {
2639 statusp->Owner = attrp->owner;
2640 mask |= AFS_SETOWNER;
2642 if (attrp->mask & CM_ATTRMASK_GROUP) {
2643 statusp->Group = attrp->group;
2644 mask |= AFS_SETGROUP;
2647 statusp->Mask = mask;
2650 /* set the file size, and make sure that all relevant buffers have been
2651 * truncated. Ensure that any partially truncated buffers have been zeroed
2652 * to the end of the buffer.
2654 long cm_SetLength(cm_scache_t *scp, osi_hyper_t *sizep, cm_user_t *userp,
2660 /* start by locking out buffer creation */
2661 lock_ObtainWrite(&scp->bufCreateLock);
2663 /* verify that this is a file, not a dir or a symlink */
2664 lock_ObtainWrite(&scp->rw);
2665 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
2666 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2669 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2671 if (scp->fileType != CM_SCACHETYPE_FILE) {
2672 code = CM_ERROR_ISDIR;
2677 if (LargeIntegerLessThan(*sizep, scp->length))
2682 lock_ReleaseWrite(&scp->rw);
2684 /* can't hold scp->rw lock here, since we may wait for a storeback to
2685 * finish if the buffer package is cleaning a buffer by storing it to
2689 buf_Truncate(scp, userp, reqp, sizep);
2691 /* now ensure that file length is short enough, and update truncPos */
2692 lock_ObtainWrite(&scp->rw);
2694 /* make sure we have a callback (so we have the right value for the
2695 * length), and wait for it to be safe to do a truncate.
2697 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_WRITE,
2698 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2699 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2701 /* If we only have 'i' bits, then we should still be able to set
2702 the size of a file we created. */
2703 if (code == CM_ERROR_NOACCESS && scp->creator == userp) {
2704 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
2705 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2706 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2712 if (LargeIntegerLessThan(*sizep, scp->length)) {
2713 /* a real truncation. If truncPos is not set yet, or is bigger
2714 * than where we're truncating the file, set truncPos to this
2719 if (!(scp->mask & CM_SCACHEMASK_TRUNCPOS)
2720 || LargeIntegerLessThan(*sizep, scp->length)) {
2722 scp->truncPos = *sizep;
2723 scp->mask |= CM_SCACHEMASK_TRUNCPOS;
2725 /* in either case, the new file size has been changed */
2726 scp->length = *sizep;
2727 scp->mask |= CM_SCACHEMASK_LENGTH;
2729 else if (LargeIntegerGreaterThan(*sizep, scp->length)) {
2730 /* really extending the file */
2731 scp->length = *sizep;
2732 scp->mask |= CM_SCACHEMASK_LENGTH;
2735 /* done successfully */
2738 cm_SyncOpDone(scp, NULL,
2739 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2740 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2743 lock_ReleaseWrite(&scp->rw);
2744 lock_ReleaseWrite(&scp->bufCreateLock);
2749 /* set the file size or other attributes (but not both at once) */
2750 long cm_SetAttr(cm_scache_t *scp, cm_attr_t *attrp, cm_user_t *userp,
2754 AFSFetchStatus afsOutStatus;
2758 AFSStoreStatus afsInStatus;
2759 struct rx_connection * rxconnp;
2761 memset(&volSync, 0, sizeof(volSync));
2763 /* handle file length setting */
2764 if (attrp->mask & CM_ATTRMASK_LENGTH)
2765 return cm_SetLength(scp, &attrp->length, userp, reqp);
2767 lock_ObtainWrite(&scp->rw);
2768 /* Check for RO volume */
2769 if (scp->flags & CM_SCACHEFLAG_RO) {
2770 code = CM_ERROR_READONLY;
2771 lock_ReleaseWrite(&scp->rw);
2775 /* otherwise, we have to make an RPC to get the status */
2776 code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STORESTATUS);
2778 lock_ReleaseWrite(&scp->rw);
2781 lock_ConvertWToR(&scp->rw);
2783 /* make the attr structure */
2784 cm_StatusFromAttr(&afsInStatus, scp, attrp);
2786 tfid.Volume = scp->fid.volume;
2787 tfid.Vnode = scp->fid.vnode;
2788 tfid.Unique = scp->fid.unique;
2789 lock_ReleaseRead(&scp->rw);
2791 /* now make the RPC */
2792 InterlockedIncrement(&scp->activeRPCs);
2794 osi_Log1(afsd_logp, "CALL StoreStatus scp 0x%p", scp);
2796 code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
2800 rxconnp = cm_GetRxConn(connp);
2801 code = RXAFS_StoreStatus(rxconnp, &tfid,
2802 &afsInStatus, &afsOutStatus, &volSync);
2803 rx_PutConnection(rxconnp);
2805 } while (cm_Analyze(connp, userp, reqp,
2806 &scp->fid, &volSync, NULL, NULL, code));
2807 code = cm_MapRPCError(code, reqp);
2810 osi_Log1(afsd_logp, "CALL StoreStatus FAILURE, code 0x%x", code);
2812 osi_Log0(afsd_logp, "CALL StoreStatus SUCCESS");
2814 lock_ObtainWrite(&scp->rw);
2816 cm_MergeStatus(NULL, scp, &afsOutStatus, &volSync, userp, reqp,
2817 CM_MERGEFLAG_FORCE|CM_MERGEFLAG_STOREDATA);
2819 InterlockedDecrement(&scp->activeRPCs);
2820 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STORESTATUS);
2822 /* if we're changing the mode bits, discard the ACL cache,
2823 * since we changed the mode bits.
2825 if (afsInStatus.Mask & AFS_SETMODE)
2826 cm_FreeAllACLEnts(scp);
2827 lock_ReleaseWrite(&scp->rw);
2831 long cm_Create(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
2832 cm_scache_t **scpp, cm_user_t *userp, cm_req_t *reqp)
2837 cm_callbackRequest_t cbReq;
2840 cm_scache_t *scp = NULL;
2842 AFSStoreStatus inStatus;
2843 AFSFetchStatus updatedDirStatus;
2844 AFSFetchStatus newFileStatus;
2845 AFSCallBack newFileCallback;
2847 struct rx_connection * rxconnp;
2849 fschar_t * fnamep = NULL;
2851 memset(&volSync, 0, sizeof(volSync));
2853 /* can't create names with @sys in them; must expand it manually first.
2854 * return "invalid request" if they try.
2856 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
2857 return CM_ERROR_ATSYS;
2860 #ifdef AFS_FREELANCE_CLIENT
2861 /* Freelance root volume does not hold files */
2862 if (cm_freelanceEnabled &&
2863 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
2864 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
2866 return CM_ERROR_NOACCESS;
2868 #endif /* AFS_FREELANCE_CLIENT */
2870 /* Check for RO volume */
2871 if (dscp->flags & CM_SCACHEFLAG_RO)
2872 return CM_ERROR_READONLY;
2874 /* before starting the RPC, mark that we're changing the file data, so
2875 * that someone who does a chmod will know to wait until our call
2878 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
2880 lock_ObtainWrite(&dscp->rw);
2881 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
2882 lock_ReleaseWrite(&dscp->rw);
2884 cm_StartCallbackGrantingCall(NULL, &cbReq);
2886 cm_EndDirOp(&dirop);
2893 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
2895 cm_StatusFromAttr(&inStatus, NULL, attrp);
2897 /* try the RPC now */
2898 InterlockedIncrement(&dscp->activeRPCs);
2899 osi_Log1(afsd_logp, "CALL CreateFile scp 0x%p", dscp);
2901 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
2905 dirAFSFid.Volume = dscp->fid.volume;
2906 dirAFSFid.Vnode = dscp->fid.vnode;
2907 dirAFSFid.Unique = dscp->fid.unique;
2909 rxconnp = cm_GetRxConn(connp);
2910 code = RXAFS_CreateFile(connp->rxconnp, &dirAFSFid, fnamep,
2911 &inStatus, &newAFSFid, &newFileStatus,
2912 &updatedDirStatus, &newFileCallback,
2914 rx_PutConnection(rxconnp);
2916 } while (cm_Analyze(connp, userp, reqp,
2917 &dscp->fid, &volSync, NULL, &cbReq, code));
2918 code = cm_MapRPCError(code, reqp);
2921 osi_Log1(afsd_logp, "CALL CreateFile FAILURE, code 0x%x", code);
2923 osi_Log0(afsd_logp, "CALL CreateFile SUCCESS");
2926 lock_ObtainWrite(&dirop.scp->dirlock);
2927 dirop.lockType = CM_DIRLOCK_WRITE;
2929 lock_ObtainWrite(&dscp->rw);
2931 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
2932 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
2933 if (cm_CheckDirOpForSingleChange(&dirop)) {
2934 lock_ReleaseWrite(&dscp->rw);
2935 cm_DirCreateEntry(&dirop, fnamep, &newFid);
2937 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
2939 lock_ObtainWrite(&dscp->rw);
2942 InterlockedDecrement(&dscp->activeRPCs);
2944 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
2945 lock_ReleaseWrite(&dscp->rw);
2947 /* now try to create the file's entry, too, but be careful to
2948 * make sure that we don't merge in old info. Since we weren't locking
2949 * out any requests during the file's creation, we may have pretty old
2953 code = cm_GetSCache(&newFid, &scp, userp, reqp);
2955 lock_ObtainWrite(&scp->rw);
2956 scp->creator = userp; /* remember who created it */
2957 if (!cm_HaveCallback(scp)) {
2958 cm_EndCallbackGrantingCall(scp, &cbReq,
2959 &newFileCallback, &volSync, 0);
2960 InterlockedIncrement(&scp->activeRPCs);
2961 cm_MergeStatus(dscp, scp, &newFileStatus, &volSync,
2965 lock_ReleaseWrite(&scp->rw);
2969 /* make sure we end things properly */
2971 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2973 cm_EndDirOp(&dirop);
2982 cm_ReleaseSCache(scp);
2988 * locked if TRUE means write-locked
2989 * else the cm_scache_t rw must not be held
2991 long cm_FSync(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp, afs_uint32 locked)
2996 lock_ReleaseWrite(&scp->rw);
2998 osi_Log2(afsd_logp, "cm_FSync scp 0x%p userp 0x%p", scp, userp);
3000 code = buf_CleanVnode(scp, userp, reqp);
3002 lock_ObtainWrite(&scp->rw);
3004 if (scp->mask & (CM_SCACHEMASK_TRUNCPOS
3005 | CM_SCACHEMASK_CLIENTMODTIME
3006 | CM_SCACHEMASK_LENGTH))
3007 code = cm_StoreMini(scp, userp, reqp);
3009 if (scp->flags & (CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE)) {
3010 code = (scp->flags & CM_SCACHEFLAG_OVERQUOTA) ? CM_ERROR_QUOTA : CM_ERROR_SPACE;
3011 scp->flags &= ~(CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE);
3015 lock_ReleaseWrite(&scp->rw);
3016 } else if (locked) {
3017 lock_ObtainWrite(&scp->rw);
3022 long cm_MakeDir(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
3023 cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3028 cm_callbackRequest_t cbReq;
3031 cm_scache_t *scp = NULL;
3033 AFSStoreStatus inStatus;
3034 AFSFetchStatus updatedDirStatus;
3035 AFSFetchStatus newDirStatus;
3036 AFSCallBack newDirCallback;
3038 struct rx_connection * rxconnp;
3040 fschar_t * fnamep = NULL;
3042 memset(&volSync, 0, sizeof(volSync));
3044 /* can't create names with @sys in them; must expand it manually first.
3045 * return "invalid request" if they try.
3047 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
3048 return CM_ERROR_ATSYS;
3051 #ifdef AFS_FREELANCE_CLIENT
3052 /* Freelance root volume does not hold subdirectories */
3053 if (cm_freelanceEnabled &&
3054 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
3055 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
3057 return CM_ERROR_NOACCESS;
3059 #endif /* AFS_FREELANCE_CLIENT */
3061 /* Check for RO volume */
3062 if (dscp->flags & CM_SCACHEFLAG_RO)
3063 return CM_ERROR_READONLY;
3065 /* before starting the RPC, mark that we're changing the directory
3066 * data, so that someone who does a chmod on the dir will wait until
3067 * our call completes.
3069 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3071 lock_ObtainWrite(&dscp->rw);
3072 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3073 lock_ReleaseWrite(&dscp->rw);
3075 cm_StartCallbackGrantingCall(NULL, &cbReq);
3077 cm_EndDirOp(&dirop);
3084 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3085 cm_StatusFromAttr(&inStatus, NULL, attrp);
3087 /* try the RPC now */
3088 InterlockedIncrement(&dscp->activeRPCs);
3089 osi_Log1(afsd_logp, "CALL MakeDir 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_MakeDir(connp->rxconnp, &dirAFSFid, fnamep,
3101 &inStatus, &newAFSFid, &newDirStatus,
3102 &updatedDirStatus, &newDirCallback,
3104 rx_PutConnection(rxconnp);
3106 } while (cm_Analyze(connp, userp, reqp,
3107 &dscp->fid, &volSync, NULL, &cbReq, code));
3108 code = cm_MapRPCError(code, reqp);
3111 osi_Log1(afsd_logp, "CALL MakeDir FAILURE, code 0x%x", code);
3113 osi_Log0(afsd_logp, "CALL MakeDir SUCCESS");
3116 lock_ObtainWrite(&dirop.scp->dirlock);
3117 dirop.lockType = CM_DIRLOCK_WRITE;
3119 lock_ObtainWrite(&dscp->rw);
3121 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3122 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3123 if (cm_CheckDirOpForSingleChange(&dirop)) {
3124 lock_ReleaseWrite(&dscp->rw);
3125 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3127 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3129 lock_ObtainWrite(&dscp->rw);
3132 InterlockedDecrement(&dscp->activeRPCs);
3134 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3135 lock_ReleaseWrite(&dscp->rw);
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 code = cm_GetSCache(&newFid, &scp, userp, reqp);
3145 lock_ObtainWrite(&scp->rw);
3146 if (!cm_HaveCallback(scp)) {
3147 cm_EndCallbackGrantingCall(scp, &cbReq,
3148 &newDirCallback, &volSync, 0);
3149 InterlockedIncrement(&scp->activeRPCs);
3150 cm_MergeStatus(dscp, scp, &newDirStatus, &volSync,
3154 lock_ReleaseWrite(&scp->rw);
3158 /* make sure we end things properly */
3160 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
3162 cm_EndDirOp(&dirop);
3170 cm_ReleaseSCache(scp);
3173 /* and return error code */
3177 long cm_Link(cm_scache_t *dscp, clientchar_t *cnamep, cm_scache_t *sscp, long flags,
3178 cm_user_t *userp, cm_req_t *reqp)
3183 AFSFid existingAFSFid;
3184 AFSFetchStatus updatedDirStatus;
3185 AFSFetchStatus newLinkStatus;
3187 struct rx_connection * rxconnp;
3189 fschar_t * fnamep = NULL;
3192 memset(&volSync, 0, sizeof(volSync));
3194 if (dscp->fid.cell != sscp->fid.cell ||
3195 dscp->fid.volume != sscp->fid.volume) {
3196 return CM_ERROR_CROSSDEVLINK;
3199 /* Check for RO volume */
3200 if (dscp->flags & CM_SCACHEFLAG_RO)
3201 return CM_ERROR_READONLY;
3203 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3205 lock_ObtainWrite(&dscp->rw);
3206 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3207 lock_ReleaseWrite(&dscp->rw);
3209 cm_EndDirOp(&dirop);
3214 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3216 /* try the RPC now */
3217 InterlockedIncrement(&dscp->activeRPCs);
3218 osi_Log1(afsd_logp, "CALL Link scp 0x%p", dscp);
3220 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3223 dirAFSFid.Volume = dscp->fid.volume;
3224 dirAFSFid.Vnode = dscp->fid.vnode;
3225 dirAFSFid.Unique = dscp->fid.unique;
3227 existingAFSFid.Volume = sscp->fid.volume;
3228 existingAFSFid.Vnode = sscp->fid.vnode;
3229 existingAFSFid.Unique = sscp->fid.unique;
3231 rxconnp = cm_GetRxConn(connp);
3232 code = RXAFS_Link(rxconnp, &dirAFSFid, fnamep, &existingAFSFid,
3233 &newLinkStatus, &updatedDirStatus, &volSync);
3234 rx_PutConnection(rxconnp);
3235 osi_Log1(afsd_logp," RXAFS_Link returns 0x%x", code);
3237 } while (cm_Analyze(connp, userp, reqp,
3238 &dscp->fid, &volSync, NULL, NULL, code));
3240 code = cm_MapRPCError(code, reqp);
3243 osi_Log1(afsd_logp, "CALL Link FAILURE, code 0x%x", code);
3245 osi_Log0(afsd_logp, "CALL Link SUCCESS");
3248 lock_ObtainWrite(&dirop.scp->dirlock);
3249 dirop.lockType = CM_DIRLOCK_WRITE;
3251 lock_ObtainWrite(&dscp->rw);
3253 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3256 if (cm_CheckDirOpForSingleChange(&dirop)) {
3257 lock_ReleaseWrite(&dscp->rw);
3258 cm_DirCreateEntry(&dirop, fnamep, &sscp->fid);
3260 cm_BPlusDirCreateEntry(&dirop, cnamep, &sscp->fid);
3262 lock_ObtainWrite(&dscp->rw);
3265 InterlockedDecrement(&dscp->activeRPCs);
3267 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3268 lock_ReleaseWrite(&dscp->rw);
3270 cm_EndDirOp(&dirop);
3272 if (invalidate && RDR_Initialized)
3273 RDR_InvalidateObject(dscp->fid.cell, dscp->fid.volume, dscp->fid.vnode,
3274 dscp->fid.unique, dscp->fid.hash,
3275 dscp->fileType, AFS_INVALIDATE_DATA_VERSION);
3277 /* Update the linked object status */
3279 lock_ObtainWrite(&sscp->rw);
3280 InterlockedIncrement(&sscp->activeRPCs);
3281 cm_MergeStatus(NULL, sscp, &newLinkStatus, &volSync, userp, reqp, 0);
3282 lock_ReleaseWrite(&sscp->rw);
3290 long cm_SymLink(cm_scache_t *dscp, clientchar_t *cnamep, fschar_t *contentsp, long flags,
3291 cm_attr_t *attrp, cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3299 AFSStoreStatus inStatus;
3300 AFSFetchStatus updatedDirStatus;
3301 AFSFetchStatus newLinkStatus;
3303 struct rx_connection * rxconnp;
3305 fschar_t *fnamep = NULL;
3310 /* Check for RO volume */
3311 if (dscp->flags & CM_SCACHEFLAG_RO)
3312 return CM_ERROR_READONLY;
3314 memset(&volSync, 0, sizeof(volSync));
3316 /* before starting the RPC, mark that we're changing the directory data,
3317 * so that someone who does a chmod on the dir will wait until our
3320 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3322 lock_ObtainWrite(&dscp->rw);
3323 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3324 lock_ReleaseWrite(&dscp->rw);
3326 cm_EndDirOp(&dirop);
3331 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3333 cm_StatusFromAttr(&inStatus, NULL, attrp);
3335 /* try the RPC now */
3336 InterlockedIncrement(&dscp->activeRPCs);
3337 osi_Log1(afsd_logp, "CALL Symlink scp 0x%p", dscp);
3339 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3343 dirAFSFid.Volume = dscp->fid.volume;
3344 dirAFSFid.Vnode = dscp->fid.vnode;
3345 dirAFSFid.Unique = dscp->fid.unique;
3347 rxconnp = cm_GetRxConn(connp);
3348 code = RXAFS_Symlink(rxconnp, &dirAFSFid, fnamep, contentsp,
3349 &inStatus, &newAFSFid, &newLinkStatus,
3350 &updatedDirStatus, &volSync);
3351 rx_PutConnection(rxconnp);
3353 } while (cm_Analyze(connp, userp, reqp,
3354 &dscp->fid, &volSync, NULL, NULL, code));
3355 code = cm_MapRPCError(code, reqp);
3358 osi_Log1(afsd_logp, "CALL Symlink FAILURE, code 0x%x", code);
3360 osi_Log0(afsd_logp, "CALL Symlink SUCCESS");
3363 lock_ObtainWrite(&dirop.scp->dirlock);
3364 dirop.lockType = CM_DIRLOCK_WRITE;
3366 lock_ObtainWrite(&dscp->rw);
3368 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3369 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3370 if (cm_CheckDirOpForSingleChange(&dirop)) {
3371 lock_ReleaseWrite(&dscp->rw);
3372 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3374 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3376 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3378 lock_ObtainWrite(&dscp->rw);
3381 InterlockedDecrement(&dscp->activeRPCs);
3383 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3384 lock_ReleaseWrite(&dscp->rw);
3386 cm_EndDirOp(&dirop);
3388 /* now try to create the new dir's entry, too, but be careful to
3389 * make sure that we don't merge in old info. Since we weren't locking
3390 * out any requests during the file's creation, we may have pretty old
3394 code = cm_GetSCache(&newFid, &scp, userp, reqp);
3396 lock_ObtainWrite(&scp->rw);
3397 if (!cm_HaveCallback(scp)) {
3398 InterlockedIncrement(&scp->activeRPCs);
3399 cm_MergeStatus(dscp, scp, &newLinkStatus, &volSync,
3402 lock_ReleaseWrite(&scp->rw);
3407 cm_ReleaseSCache(scp);
3414 /* and return error code */
3418 /*! \brief Remove a directory
3420 Encapsulates a call to RXAFS_RemoveDir().
3422 \param[in] dscp cm_scache_t for the directory containing the
3423 directory to be removed.
3425 \param[in] fnamep This will be the original name of the directory
3426 as known to the file server. It will be passed in to RXAFS_RemoveDir().
3427 This parameter is optional. If it is not provided the value
3430 \param[in] cnamep Normalized name used to update the local
3433 \param[in] userp cm_user_t for the request.
3435 \param[in] reqp Request tracker.
3437 long cm_RemoveDir(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t *cnamep, cm_user_t *userp, cm_req_t *reqp)
3443 AFSFetchStatus updatedDirStatus;
3445 struct rx_connection * rxconnp;
3447 cm_scache_t *scp = NULL;
3448 int free_fnamep = FALSE;
3450 memset(&volSync, 0, sizeof(volSync));
3452 if (fnamep == NULL) {
3455 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
3456 CM_DIROP_FLAG_NONE, &dirop);
3458 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
3461 cm_EndDirOp(&dirop);
3468 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
3472 /* Check for RO volume */
3473 if (dscp->flags & CM_SCACHEFLAG_RO) {
3474 code = CM_ERROR_READONLY;
3478 /* before starting the RPC, mark that we're changing the directory data,
3479 * so that someone who does a chmod on the dir will wait until our
3482 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3484 lock_ObtainWrite(&dscp->rw);
3485 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3486 lock_ReleaseWrite(&dscp->rw);
3488 cm_EndDirOp(&dirop);
3493 /* try the RPC now */
3494 InterlockedIncrement(&dscp->activeRPCs);
3495 osi_Log1(afsd_logp, "CALL RemoveDir scp 0x%p", dscp);
3497 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3501 dirAFSFid.Volume = dscp->fid.volume;
3502 dirAFSFid.Vnode = dscp->fid.vnode;
3503 dirAFSFid.Unique = dscp->fid.unique;
3505 rxconnp = cm_GetRxConn(connp);
3506 code = RXAFS_RemoveDir(rxconnp, &dirAFSFid, fnamep,
3507 &updatedDirStatus, &volSync);
3508 rx_PutConnection(rxconnp);
3510 } while (cm_Analyze(connp, userp, reqp,
3511 &dscp->fid, &volSync, NULL, NULL, code));
3512 code = cm_MapRPCErrorRmdir(code, reqp);
3515 osi_Log1(afsd_logp, "CALL RemoveDir FAILURE, code 0x%x", code);
3517 osi_Log0(afsd_logp, "CALL RemoveDir SUCCESS");
3520 lock_ObtainWrite(&dirop.scp->dirlock);
3521 dirop.lockType = CM_DIRLOCK_WRITE;
3523 lock_ObtainWrite(&dscp->rw);
3525 cm_dnlcRemove(dscp, cnamep);
3526 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3527 if (cm_CheckDirOpForSingleChange(&dirop) && cnamep != NULL) {
3528 lock_ReleaseWrite(&dscp->rw);
3529 cm_DirDeleteEntry(&dirop, fnamep);
3531 cm_BPlusDirDeleteEntry(&dirop, cnamep);
3533 lock_ObtainWrite(&dscp->rw);
3536 InterlockedDecrement(&dscp->activeRPCs);
3538 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3539 lock_ReleaseWrite(&dscp->rw);
3541 cm_EndDirOp(&dirop);
3544 cm_ReleaseSCache(scp);
3546 lock_ObtainWrite(&scp->rw);
3547 scp->flags |= CM_SCACHEFLAG_DELETED;
3548 lock_ObtainWrite(&cm_scacheLock);
3549 cm_AdjustScacheLRU(scp);
3550 cm_RemoveSCacheFromHashTable(scp);
3551 lock_ReleaseWrite(&cm_scacheLock);
3552 lock_ReleaseWrite(&scp->rw);
3553 if (RDR_Initialized && !(reqp->flags & CM_REQ_SOURCE_REDIR) &&
3554 !RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode,
3555 scp->fid.unique, scp->fid.hash,
3556 scp->fileType, AFS_INVALIDATE_DELETED))
3557 buf_ClearRDRFlag(scp, "rmdir");
3565 /* and return error code */
3569 long cm_Open(cm_scache_t *scp, int type, cm_user_t *userp)
3571 /* grab mutex on contents */
3572 lock_ObtainWrite(&scp->rw);
3574 /* reset the prefetch info */
3575 scp->prefetch.base.LowPart = 0; /* base */
3576 scp->prefetch.base.HighPart = 0;
3577 scp->prefetch.end.LowPart = 0; /* and end */
3578 scp->prefetch.end.HighPart = 0;
3580 /* release mutex on contents */
3581 lock_ReleaseWrite(&scp->rw);
3587 /*! \brief Rename a file or directory
3589 Encapsulates a RXAFS_Rename() call.
3591 \param[in] oldDscp cm_scache_t for the directory containing the old
3594 \param[in] oldNamep The original old name known to the file server.
3595 This is the name that will be passed into the RXAFS_Rename().
3596 If it is not provided, it will be looked up.
3598 \param[in] normalizedOldNamep Normalized old name. This is used for
3599 updating local directory caches.
3601 \param[in] newDscp cm_scache_t for the directory containing the new
3604 \param[in] newNamep New name. Normalized.
3606 \param[in] userp cm_user_t for the request.
3608 \param[in,out] reqp Request tracker.
3611 long cm_Rename(cm_scache_t *oldDscp, fschar_t *oldNamep, clientchar_t *cOldNamep,
3612 cm_scache_t *newDscp, clientchar_t *cNewNamep, cm_user_t *userp,
3617 AFSFid oldDirAFSFid;
3618 AFSFid newDirAFSFid;
3620 AFSFetchStatus updatedOldDirStatus;
3621 AFSFetchStatus updatedNewDirStatus;
3624 struct rx_connection * rxconnp;
3625 cm_dirOp_t oldDirOp;
3628 cm_dirOp_t newDirOp;
3629 fschar_t * newNamep = NULL;
3630 int free_oldNamep = FALSE;
3631 cm_scache_t *oldScp = NULL, *newScp = NULL;
3633 memset(&volSync, 0, sizeof(volSync));
3635 if (cOldNamep == NULL || cNewNamep == NULL ||
3636 cm_ClientStrLen(cOldNamep) == 0 ||
3637 cm_ClientStrLen(cNewNamep) == 0)
3638 return CM_ERROR_INVAL;
3641 * Before we permit the operation, make sure that we do not already have
3642 * an object in the destination directory that has a case-insensitive match
3643 * for this name UNLESS the matching object is the object we are renaming.
3645 code = cm_Lookup(oldDscp, cOldNamep, 0, userp, reqp, &oldScp);
3647 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S old name lookup failed",
3648 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3652 /* Case sensitive lookup. If this succeeds we are done. */
3653 code = cm_Lookup(newDscp, cNewNamep, 0, userp, reqp, &newScp);
3656 * Case insensitive lookup. If this succeeds, it could have found the
3657 * same file with a name that differs only by case or it could be a
3658 * different file entirely.
3660 code = cm_Lookup(newDscp, cNewNamep, CM_FLAG_CASEFOLD, userp, reqp, &newScp);
3662 /* found a matching object with the new name */
3663 if (cm_FidCmp(&oldScp->fid, &newScp->fid)) {
3664 /* and they don't match so return an error */
3665 osi_Log2(afsd_logp, "cm_Rename newDscp 0x%p cNewName %S new name already exists",
3666 newDscp, osi_LogSaveStringW(afsd_logp, cNewNamep));
3667 code = CM_ERROR_EXISTS;
3669 cm_ReleaseSCache(newScp);
3671 } else if (code == CM_ERROR_AMBIGUOUS_FILENAME) {
3672 code = CM_ERROR_EXISTS;
3674 /* The target does not exist. Clear the error and perform the rename. */
3679 /* Check for RO volume */
3681 (oldDscp->flags & CM_SCACHEFLAG_RO) || (newDscp->flags & CM_SCACHEFLAG_RO)) {
3682 code = CM_ERROR_READONLY;
3688 if (oldNamep == NULL) {
3691 code = cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_READ,
3692 CM_DIROP_FLAG_NONE, &oldDirOp);
3694 code = cm_BPlusDirLookupOriginalName(&oldDirOp, cOldNamep, &oldNamep);
3696 free_oldNamep = TRUE;
3697 cm_EndDirOp(&oldDirOp);
3701 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S Original Name lookup failed",
3702 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3708 /* before starting the RPC, mark that we're changing the directory data,
3709 * so that someone who does a chmod on the dir will wait until our call
3710 * completes. We do this in vnode order so that we don't deadlock,
3711 * which makes the code a little verbose.
3713 if (oldDscp == newDscp) {
3714 /* check for identical names */
3715 if (cm_ClientStrCmp(cOldNamep, cNewNamep) == 0) {
3716 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_RENAME_IDENTICAL",
3718 code = CM_ERROR_RENAME_IDENTICAL;
3723 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3724 CM_DIROP_FLAG_NONE, &oldDirOp);
3725 lock_ObtainWrite(&oldDscp->rw);
3726 cm_dnlcRemove(oldDscp, cOldNamep);
3727 cm_dnlcRemove(oldDscp, cNewNamep);
3728 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3729 CM_SCACHESYNC_STOREDATA);
3730 lock_ReleaseWrite(&oldDscp->rw);
3732 cm_EndDirOp(&oldDirOp);
3736 /* two distinct dir vnodes */
3738 if (oldDscp->fid.cell != newDscp->fid.cell ||
3739 oldDscp->fid.volume != newDscp->fid.volume) {
3740 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_CROSSDEVLINK",
3742 code = CM_ERROR_CROSSDEVLINK;
3746 /* shouldn't happen that we have distinct vnodes for two
3747 * different files, but could due to deliberate attack, or
3748 * stale info. Avoid deadlocks and quit now.
3750 if (oldDscp->fid.vnode == newDscp->fid.vnode) {
3751 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p vnode collision",
3753 code = CM_ERROR_CROSSDEVLINK;
3757 if (oldDscp->fid.vnode < newDscp->fid.vnode) {
3758 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3759 CM_DIROP_FLAG_NONE, &oldDirOp);
3760 lock_ObtainWrite(&oldDscp->rw);
3761 cm_dnlcRemove(oldDscp, cOldNamep);
3762 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3763 CM_SCACHESYNC_STOREDATA);
3764 lock_ReleaseWrite(&oldDscp->rw);
3766 cm_EndDirOp(&oldDirOp);
3768 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3769 CM_DIROP_FLAG_NONE, &newDirOp);
3770 lock_ObtainWrite(&newDscp->rw);
3771 cm_dnlcRemove(newDscp, cNewNamep);
3772 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3773 CM_SCACHESYNC_STOREDATA);
3774 lock_ReleaseWrite(&newDscp->rw);
3776 cm_EndDirOp(&newDirOp);
3778 /* cleanup first one */
3779 lock_ObtainWrite(&oldDscp->rw);
3780 cm_SyncOpDone(oldDscp, NULL,
3781 CM_SCACHESYNC_STOREDATA);
3782 lock_ReleaseWrite(&oldDscp->rw);
3783 cm_EndDirOp(&oldDirOp);
3788 /* lock the new vnode entry first */
3789 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3790 CM_DIROP_FLAG_NONE, &newDirOp);
3791 lock_ObtainWrite(&newDscp->rw);
3792 cm_dnlcRemove(newDscp, cNewNamep);
3793 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3794 CM_SCACHESYNC_STOREDATA);
3795 lock_ReleaseWrite(&newDscp->rw);
3797 cm_EndDirOp(&newDirOp);
3799 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3800 CM_DIROP_FLAG_NONE, &oldDirOp);
3801 lock_ObtainWrite(&oldDscp->rw);
3802 cm_dnlcRemove(oldDscp, cOldNamep);
3803 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3804 CM_SCACHESYNC_STOREDATA);
3805 lock_ReleaseWrite(&oldDscp->rw);
3807 cm_EndDirOp(&oldDirOp);
3809 /* cleanup first one */
3810 lock_ObtainWrite(&newDscp->rw);
3811 cm_SyncOpDone(newDscp, NULL,
3812 CM_SCACHESYNC_STOREDATA);
3813 lock_ReleaseWrite(&newDscp->rw);
3814 cm_EndDirOp(&newDirOp);
3818 } /* two distinct vnodes */
3825 newNamep = cm_ClientStringToFsStringAlloc(cNewNamep, -1, NULL);
3827 /* try the RPC now */
3828 InterlockedIncrement(&oldDscp->activeRPCs);
3830 InterlockedIncrement(&newDscp->activeRPCs);
3831 osi_Log2(afsd_logp, "CALL Rename old scp 0x%p new scp 0x%p",
3834 code = cm_ConnFromFID(&oldDscp->fid, userp, reqp, &connp);
3838 oldDirAFSFid.Volume = oldDscp->fid.volume;
3839 oldDirAFSFid.Vnode = oldDscp->fid.vnode;
3840 oldDirAFSFid.Unique = oldDscp->fid.unique;
3841 newDirAFSFid.Volume = newDscp->fid.volume;
3842 newDirAFSFid.Vnode = newDscp->fid.vnode;
3843 newDirAFSFid.Unique = newDscp->fid.unique;
3845 rxconnp = cm_GetRxConn(connp);
3846 code = RXAFS_Rename(rxconnp, &oldDirAFSFid, oldNamep,
3847 &newDirAFSFid, newNamep,
3848 &updatedOldDirStatus, &updatedNewDirStatus,
3850 rx_PutConnection(rxconnp);
3852 } while (cm_Analyze(connp, userp, reqp, &oldDscp->fid,
3853 &volSync, NULL, NULL, code));
3854 code = cm_MapRPCError(code, reqp);
3857 osi_Log1(afsd_logp, "CALL Rename FAILURE, code 0x%x", code);
3859 osi_Log0(afsd_logp, "CALL Rename SUCCESS");
3861 /* update the individual stat cache entries for the directories */
3863 lock_ObtainWrite(&oldDirOp.scp->dirlock);
3864 oldDirOp.lockType = CM_DIRLOCK_WRITE;
3867 lock_ObtainWrite(&oldDscp->rw);
3869 cm_MergeStatus(NULL, oldDscp, &updatedOldDirStatus, &volSync,
3870 userp, reqp, CM_MERGEFLAG_DIROP);
3871 if (cm_CheckDirOpForSingleChange(&oldDirOp)) {
3872 lock_ReleaseWrite(&oldDscp->rw);
3874 diropCode = cm_BPlusDirLookup(&oldDirOp, cOldNamep, &fileFid);
3875 if (diropCode == CM_ERROR_INEXACT_MATCH)
3877 else if (diropCode == EINVAL)
3879 diropCode = cm_DirLookup(&oldDirOp, oldNamep, &fileFid);
3881 if (diropCode == 0) {
3883 diropCode = cm_DirCreateEntry(&oldDirOp, newNamep, &fileFid);
3885 cm_BPlusDirCreateEntry(&oldDirOp, cNewNamep, &fileFid);
3889 if (diropCode == 0) {
3890 diropCode = cm_DirDeleteEntry(&oldDirOp, oldNamep);
3892 cm_BPlusDirDeleteEntry(&oldDirOp, cOldNamep);
3896 lock_ObtainWrite(&oldDscp->rw);
3899 InterlockedDecrement(&oldDscp->activeRPCs);
3901 cm_SyncOpDone(oldDscp, NULL, CM_SCACHESYNC_STOREDATA);
3902 lock_ReleaseWrite(&oldDscp->rw);
3904 cm_EndDirOp(&oldDirOp);
3906 /* and update it for the new one, too, if necessary */
3909 lock_ObtainWrite(&newDirOp.scp->dirlock);
3910 newDirOp.lockType = CM_DIRLOCK_WRITE;
3912 lock_ObtainWrite(&newDscp->rw);
3914 cm_MergeStatus(NULL, newDscp, &updatedNewDirStatus, &volSync,
3915 userp, reqp, CM_MERGEFLAG_DIROP);
3918 * The following optimization does not work.
3919 * When the file server processed a RXAFS_Rename() request the
3920 * FID of the object being moved between directories is not
3921 * preserved. The client does not know the new FID nor the
3922 * version number of the target. Not only can we not create
3923 * the directory entry in the new directory, but we can't
3924 * preserve the cached data for the file. It must be re-read
3925 * from the file server. - jaltman, 2009/02/20
3927 /* we only make the local change if we successfully made
3928 * the change in the old directory AND there was only one
3929 * change in the new directory
3931 if (diropCode == 0 && cm_CheckDirOpForSingleChange(&newDirOp)) {
3932 lock_ReleaseWrite(&newDscp->rw);
3933 cm_DirCreateEntry(&newDirOp, newNamep, &fileFid);
3935 cm_BPlusDirCreateEntry(&newDirOp, cNewNamep, &fileFid);
3937 lock_ObtainWrite(&newDscp->rw);
3941 InterlockedIncrement(&newDscp->activeRPCs);
3943 cm_SyncOpDone(newDscp, NULL, CM_SCACHESYNC_STOREDATA);
3944 lock_ReleaseWrite(&newDscp->rw);
3946 cm_EndDirOp(&newDirOp);
3950 * After the rename the file server has invalidated the callbacks
3951 * on the file that was moved nor do we have a directory reference
3954 lock_ObtainWrite(&oldScp->rw);
3955 cm_DiscardSCache(oldScp);
3956 lock_ReleaseWrite(&oldScp->rw);
3958 if (RDR_Initialized)
3959 RDR_InvalidateObject(oldScp->fid.cell, oldScp->fid.volume, oldScp->fid.vnode, oldScp->fid.unique,
3960 oldScp->fid.hash, oldScp->fileType, AFS_INVALIDATE_CALLBACK);
3963 cm_ReleaseSCache(oldScp);
3970 /* and return error code */
3974 /* Byte range locks:
3976 The OpenAFS Windows client has to fake byte range locks given no
3977 server side support for such locks. This is implemented as keyed
3978 byte range locks on the cache manager.
3980 Keyed byte range locks:
3982 Each cm_scache_t structure keeps track of a list of keyed locks.
3983 The key for a lock identifies an owner of a set of locks (referred
3984 to as a client). Each key is represented by a value. The set of
3985 key values used within a specific cm_scache_t structure form a
3986 namespace that has a scope of just that cm_scache_t structure. The
3987 same key value can be used with another cm_scache_t structure and
3988 correspond to a completely different client. However it is
3989 advantageous for the SMB or IFS layer to make sure that there is a
3990 1-1 mapping between client and keys over all cm_scache_t objects.
3992 Assume a client C has key Key(C) (although, since the scope of the
3993 key is a cm_scache_t, the key can be Key(C,S), where S is the
3994 cm_scache_t. But assume a 1-1 relation between keys and clients).
3995 A byte range (O,+L) denotes byte addresses (O) through (O+L-1)
3996 inclusive (a.k.a. [O,O+L-1]). The function Key(x) is implemented
3997 through cm_generateKey() function for both SMB and IFS.
3999 The list of locks for a cm_scache_t object S is maintained in
4000 S->fileLocks. The cache manager will set a lock on the AFS file
4001 server in order to assert the locks in S->fileLocks. If only
4002 shared locks are in place for S, then the cache manager will obtain
4003 a LockRead lock, while if there are any exclusive locks, it will
4004 obtain a LockWrite lock. If the exclusive locks are all released
4005 while the shared locks remain, then the cache manager will
4006 downgrade the lock from LockWrite to LockRead. Similarly, if an
4007 exclusive lock is obtained when only shared locks exist, then the
4008 cache manager will try to upgrade the lock from LockRead to
4011 Each lock L owned by client C maintains a key L->key such that
4012 L->key == Key(C), the effective range defined by L->LOffset and
4013 L->LLength such that the range of bytes affected by the lock is
4014 (L->LOffset, +L->LLength), a type maintained in L->LockType which
4015 is either exclusive or shared.
4019 A lock exists iff it is in S->fileLocks for some cm_scache_t
4020 S. Existing locks are in one of the following states: ACTIVE,
4021 WAITLOCK, WAITUNLOCK, LOST, DELETED.
4023 The following sections describe each lock and the associated
4026 1. ACTIVE: A lock L is ACTIVE iff the cache manager has asserted
4027 the lock with the AFS file server. This type of lock can be
4028 exercised by a client to read or write to the locked region (as
4031 1.1 ACTIVE->LOST: When the AFS file server fails to extend a
4032 server lock that was required to assert the lock. Before
4033 marking the lock as lost, the cache manager checks if the file
4034 has changed on the server. If the file has not changed, then
4035 the cache manager will attempt to obtain a new server lock
4036 that is sufficient to assert the client side locks for the
4037 file. If any of these fail, the lock is marked as LOST.
4038 Otherwise, it is left as ACTIVE.
4040 1.2 ACTIVE->DELETED: Lock is released.
4042 2. WAITLOCK: A lock is in a WAITLOCK state if the cache manager
4043 grants the lock but the lock is yet to be asserted with the AFS
4044 file server. Once the file server grants the lock, the state
4045 will transition to an ACTIVE lock.
4047 2.1 WAITLOCK->ACTIVE: The server granted the lock.
4049 2.2 WAITLOCK->DELETED: Lock is abandoned, or timed out during
4052 2.3 WAITLOCK->LOST: One or more locks from this client were
4053 marked as LOST. No further locks will be granted to this
4054 client until all lost locks are removed.
4056 3. WAITUNLOCK: A lock is in a WAITUNLOCK state if the cache manager
4057 receives a request for a lock that conflicts with an existing
4058 ACTIVE or WAITLOCK lock. The lock will be placed in the queue
4059 and will be granted at such time the conflicting locks are
4060 removed, at which point the state will transition to either
4063 3.1 WAITUNLOCK->ACTIVE: The conflicting lock was removed. The
4064 current serverLock is sufficient to assert this lock, or a
4065 sufficient serverLock is obtained.
4067 3.2 WAITUNLOCK->WAITLOCK: The conflicting lock was removed,
4068 however the required serverLock is yet to be asserted with the
4071 3.3 WAITUNLOCK->DELETED: The lock is abandoned, timed out or
4074 3.5 WAITUNLOCK->LOST: One or more locks from this client were
4075 marked as LOST. No further locks will be granted to this
4076 client until all lost locks are removed.
4078 4. LOST: A lock L is LOST if the server lock that was required to
4079 assert the lock could not be obtained or if it could not be
4080 extended, or if other locks by the same client were LOST.
4081 Essentially, once a lock is LOST, the contract between the cache
4082 manager and that specific client is no longer valid.
4084 The cache manager rechecks the server lock once every minute and
4085 extends it as appropriate. If this is not done for 5 minutes,
4086 the AFS file server will release the lock (the 5 minute timeout
4087 is based on current file server code and is fairly arbitrary).
4088 Once released, the lock cannot be re-obtained without verifying
4089 that the contents of the file hasn't been modified since the
4090 time the lock was released. Re-obtaining the lock without
4091 verifying this may lead to data corruption. If the lock can not
4092 be obtained safely, then all active locks for the cm_scache_t
4095 4.1 LOST->DELETED: The lock is released.
4097 5. DELETED: The lock is no longer relevant. Eventually, it will
4098 get removed from the cm_scache_t. In the meantime, it will be
4099 treated as if it does not exist.
4101 5.1 DELETED->not exist: The lock is removed from the
4104 The following are classifications of locks based on their state.
4106 6* A lock L is ACCEPTED if it is ACTIVE or WAITLOCK. These locks
4107 have been accepted by the cache manager, but may or may not have
4108 been granted back to the client.
4110 7* A lock L is QUEUED if it is ACTIVE, WAITLOCK or WAITUNLOCK.
4112 8* A lock L is WAITING if it is WAITLOCK or WAITUNLOCK.
4116 A client C can READ range (Offset,+Length) of a file represented by
4117 cm_scache_t S iff (1):
4119 1. for all _a_ in (Offset,+Length), all of the following is true:
4121 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4122 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4125 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4126 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4129 (When locks are lost on an cm_scache_t, all locks are lost. By
4130 4.2 (below), if there is an exclusive LOST lock, then there
4131 can't be any overlapping ACTIVE locks.)
4133 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4135 2. for all _a_ in (Offset,+Length), one of the following is true:
4137 2.1 Byte _a_ of S is unowned (as specified in 1.1) AND there
4138 does not exist a LOST lock L such that _a_ in
4139 (L->LOffset,+L->LLength).
4141 2.2 Byte _a_ of S is owned by C under lock L (as specified in
4142 1.2) AND L->LockType is exclusive.
4144 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4146 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4149 3.1 If L->LockType is exclusive then there does NOT exist a
4150 ACCEPTED lock M in S->fileLocks such that _a_ in
4151 (M->LOffset,+M->LLength).
4153 (If we count all QUEUED locks then we hit cases such as
4154 cascading waiting locks where the locks later on in the queue
4155 can be granted without compromising file integrity. On the
4156 other hand if only ACCEPTED locks are considered, then locks
4157 that were received earlier may end up waiting for locks that
4158 were received later to be unlocked. The choice of ACCEPTED
4159 locks was made to mimic the Windows byte range lock
4162 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4163 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4164 M->LockType is shared.
4166 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4168 4.1 M->key != Key(C)
4170 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4171 and (M->LOffset,+M->LLength) do not intersect.
4173 (Note: If a client loses a lock, it loses all locks.
4174 Subsequently, it will not be allowed to obtain any more locks
4175 until all existing LOST locks that belong to the client are
4176 released. Once all locks are released by a single client,
4177 there exists no further contract between the client and AFS
4178 about the contents of the file, hence the client can then
4179 proceed to obtain new locks and establish a new contract.
4181 This doesn't quite work as you think it should, because most
4182 applications aren't built to deal with losing locks they
4183 thought they once had. For now, we don't have a good
4184 solution to lost locks.
4186 Also, for consistency reasons, we have to hold off on
4187 granting locks that overlap exclusive LOST locks.)
4189 A client C can only unlock locks L in S->fileLocks which have
4192 The representation and invariants are as follows:
4194 - Each cm_scache_t structure keeps:
4196 - A queue of byte-range locks (cm_scache_t::fileLocks) which
4197 are of type cm_file_lock_t.
4199 - A record of the highest server-side lock that has been
4200 obtained for this object (cm_scache_t::serverLock), which is
4201 one of (-1), LockRead, LockWrite.
4203 - A count of ACCEPTED exclusive and shared locks that are in the
4204 queue (cm_scache_t::sharedLocks and
4205 cm_scache_t::exclusiveLocks)
4207 - Each cm_file_lock_t structure keeps:
4209 - The type of lock (cm_file_lock_t::LockType)
4211 - The key associated with the lock (cm_file_lock_t::key)
4213 - The offset and length of the lock (cm_file_lock_t::LOffset
4214 and cm_file_lock_t::LLength)
4216 - The state of the lock.
4218 - Time of issuance or last successful extension
4220 Semantic invariants:
4222 I1. The number of ACCEPTED locks in S->fileLocks are
4223 (S->sharedLocks + S->exclusiveLocks)
4225 External invariants:
4227 I3. S->serverLock is the lock that we have asserted with the
4228 AFS file server for this cm_scache_t.
4230 I4. S->serverLock == LockRead iff there is at least one ACTIVE
4231 shared lock, but no ACTIVE exclusive locks.
4233 I5. S->serverLock == LockWrite iff there is at least one ACTIVE
4236 I6. If L is a LOST lock, then for each lock M in S->fileLocks,
4237 M->key == L->key IMPLIES M is LOST or DELETED.
4242 #define IS_LOCK_ACTIVE(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == 0)
4244 #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)
4246 #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)
4248 #define IS_LOCK_LOST(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_LOST)
4250 #define IS_LOCK_DELETED(lockp) (((lockp)->flags & CM_FILELOCK_FLAG_DELETED) == CM_FILELOCK_FLAG_DELETED)
4253 #define IS_LOCK_ACCEPTED(lockp) (IS_LOCK_ACTIVE(lockp) || IS_LOCK_WAITLOCK(lockp))
4256 #define IS_LOCK_CLIENTONLY(lockp) ((((lockp)->scp->flags & CM_SCACHEFLAG_RO) == CM_SCACHEFLAG_RO) || (((lockp)->flags & CM_FILELOCK_FLAG_CLIENTONLY) == CM_FILELOCK_FLAG_CLIENTONLY))
4259 #define INTERSECT_RANGE(r1,r2) (((r2).offset+(r2).length) > (r1).offset && ((r1).offset +(r1).length) > (r2).offset)
4262 #define CONTAINS_RANGE(r1,r2) (((r2).offset+(r2).length) <= ((r1).offset+(r1).length) && (r1).offset <= (r2).offset)
4264 #if defined(VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS) && !defined(LOCK_TESTING)
4265 #define SCP_SUPPORTS_BRLOCKS(scp) ((scp)->cbServerp && ((scp)->cbServerp->capabilities & VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS))
4267 #define SCP_SUPPORTS_BRLOCKS(scp) (1)
4270 #define SERVERLOCKS_ENABLED(scp) (!((scp)->flags & CM_SCACHEFLAG_RO) && cm_enableServerLocks && SCP_SUPPORTS_BRLOCKS(scp))
4272 #if defined(VICED_CAPABILITY_WRITELOCKACL)
4273 #define SCP_SUPPORTS_WRITELOCKACL(scp) ((scp)->cbServerp && ((scp->cbServerp->capabilities & VICED_CAPABILITY_WRITELOCKACL)))
4275 #define SCP_SUPPORTS_WRITELOCKACL(scp) (0)
4277 /* This should really be defined in any build that this code is being
4279 #error VICED_CAPABILITY_WRITELOCKACL not defined.
4282 static void cm_LockRangeSubtract(cm_range_t * pos, const cm_range_t * neg)
4284 afs_int64 int_begin;
4287 int_begin = max(pos->offset, neg->offset);
4288 int_end = min(pos->offset+pos->length, neg->offset+neg->length);
4290 if (int_begin < int_end) {
4291 if (int_begin == pos->offset) {
4292 pos->length = pos->offset + pos->length - int_end;
4293 pos->offset = int_end;
4294 } else if (int_end == pos->offset + pos->length) {
4295 pos->length = int_begin - pos->offset;
4298 /* We only subtract ranges if the resulting range is
4299 contiguous. If we try to support non-contigous ranges, we
4300 aren't actually improving performance. */
4304 /* Called with scp->rw held. Returns 0 if all is clear to read the
4305 specified range by the client identified by key.
4307 long cm_LockCheckRead(cm_scache_t *scp,
4308 LARGE_INTEGER LOffset,
4309 LARGE_INTEGER LLength,
4312 #ifndef ADVISORY_LOCKS
4314 cm_file_lock_t *fileLock;
4318 int substract_ranges = FALSE;
4320 range.offset = LOffset.QuadPart;
4321 range.length = LLength.QuadPart;
4325 1. for all _a_ in (Offset,+Length), all of the following is true:
4327 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4328 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4331 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4332 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4337 lock_ObtainRead(&cm_scacheLock);
4339 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4341 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4343 if (INTERSECT_RANGE(range, fileLock->range)) {
4344 if (IS_LOCK_ACTIVE(fileLock)) {
4345 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4347 /* If there is an active lock for this client, it
4348 is safe to substract ranges.*/
4349 cm_LockRangeSubtract(&range, &fileLock->range);
4350 substract_ranges = TRUE;
4352 if (fileLock->lockType != LockRead) {
4353 code = CM_ERROR_LOCK_CONFLICT;
4357 /* even if the entire range is locked for reading,
4358 we still can't grant the lock at this point
4359 because the client may have lost locks. That
4360 is, unless we have already seen an active lock
4361 belonging to the client, in which case there
4362 can't be any lost locks for this client. */
4363 if (substract_ranges)
4364 cm_LockRangeSubtract(&range, &fileLock->range);
4366 } else if (IS_LOCK_LOST(fileLock) &&
4367 (cm_KeyEquals(&fileLock->key, &key, 0) || fileLock->lockType == LockWrite)) {
4368 code = CM_ERROR_BADFD;
4374 lock_ReleaseRead(&cm_scacheLock);
4376 osi_Log4(afsd_logp, "cm_LockCheckRead scp 0x%x offset %d length %d code 0x%x",
4377 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4388 /* Called with scp->rw held. Returns 0 if all is clear to write the
4389 specified range by the client identified by key.
4391 long cm_LockCheckWrite(cm_scache_t *scp,
4392 LARGE_INTEGER LOffset,
4393 LARGE_INTEGER LLength,
4396 #ifndef ADVISORY_LOCKS
4398 cm_file_lock_t *fileLock;
4403 range.offset = LOffset.QuadPart;
4404 range.length = LLength.QuadPart;
4407 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4409 2. for all _a_ in (Offset,+Length), one of the following is true:
4411 2.1 Byte _a_ of S is unowned AND there does not exist a LOST
4412 lock L such that _a_ in (L->LOffset,+L->LLength).
4414 2.2 Byte _a_ of S is owned by C under lock L AND L->LockType is
4418 lock_ObtainRead(&cm_scacheLock);
4420 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4422 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4424 if (INTERSECT_RANGE(range, fileLock->range)) {
4425 if (IS_LOCK_ACTIVE(fileLock)) {
4426 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4427 if (fileLock->lockType == LockWrite) {
4429 /* if there is an active lock for this client, it
4430 is safe to substract ranges */
4431 cm_LockRangeSubtract(&range, &fileLock->range);
4433 code = CM_ERROR_LOCK_CONFLICT;
4437 code = CM_ERROR_LOCK_CONFLICT;
4440 } else if (IS_LOCK_LOST(fileLock)) {
4441 code = CM_ERROR_BADFD;
4447 lock_ReleaseRead(&cm_scacheLock);
4449 osi_Log4(afsd_logp, "cm_LockCheckWrite scp 0x%x offset %d length %d code 0x%x",
4450 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4461 /* Called with cm_scacheLock write locked */
4462 static cm_file_lock_t * cm_GetFileLock(void) {
4465 l = (cm_file_lock_t *) cm_freeFileLocks;
4467 osi_QRemove(&cm_freeFileLocks, &l->q);
4469 l = malloc(sizeof(cm_file_lock_t));
4470 osi_assertx(l, "null cm_file_lock_t");
4473 memset(l, 0, sizeof(cm_file_lock_t));
4478 /* Called with cm_scacheLock write locked */
4479 static void cm_PutFileLock(cm_file_lock_t *l) {
4480 osi_QAdd(&cm_freeFileLocks, &l->q);
4483 /* called with scp->rw held. May release it during processing, but
4484 leaves it held on exit. */
4485 long cm_IntSetLock(cm_scache_t * scp, cm_user_t * userp, int lockType,
4491 struct rx_connection * rxconnp;
4493 afs_uint32 reqflags = reqp->flags;
4495 osi_Log2(afsd_logp, "CALL SetLock scp 0x%p for lock %d", scp, lockType);
4497 if ((lockType != LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount != 0) ||
4498 (lockType == LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount < 0))
4500 code = CM_ERROR_LOCK_NOT_GRANTED;
4501 osi_Log2(afsd_logp, "CALL SetLock FAILURE, fsLockCount %d code 0x%x", scp->fsLockCount, code);
4505 memset(&volSync, 0, sizeof(volSync));
4507 tfid.Volume = scp->fid.volume;
4508 tfid.Vnode = scp->fid.vnode;
4509 tfid.Unique = scp->fid.unique;
4512 reqp->flags |= CM_REQ_NORETRY;
4513 lock_ReleaseWrite(&scp->rw);
4516 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4520 rxconnp = cm_GetRxConn(connp);
4521 code = RXAFS_SetLock(rxconnp, &tfid, lockType,
4523 rx_PutConnection(rxconnp);
4525 } while (cm_Analyze(connp, userp, reqp, &cfid, &volSync,
4528 code = cm_MapRPCError(code, reqp);
4530 osi_Log1(afsd_logp, "CALL SetLock FAILURE, code 0x%x", code);
4532 osi_Log0(afsd_logp, "CALL SetLock SUCCESS");
4535 reqp->flags = reqflags;
4537 lock_ObtainWrite(&scp->rw);
4540 * The file server does not return a status structure so we must
4541 * locally track the file server lock count to the best of our
4544 if (lockType == LockWrite)
4545 scp->fsLockCount = -1;
4552 /* called with scp->rw held. Releases it during processing */
4553 long cm_IntReleaseLock(cm_scache_t * scp, cm_user_t * userp,
4559 struct rx_connection * rxconnp;
4562 if (scp->flags & CM_SCACHEFLAG_DELETED) {
4563 osi_Log1(afsd_logp, "CALL ReleaseLock on Deleted Vnode scp 0x%p", scp);
4567 memset(&volSync, 0, sizeof(volSync));
4569 tfid.Volume = scp->fid.volume;
4570 tfid.Vnode = scp->fid.vnode;
4571 tfid.Unique = scp->fid.unique;
4574 lock_ReleaseWrite(&scp->rw);
4576 osi_Log1(afsd_logp, "CALL ReleaseLock scp 0x%p", scp);
4579 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4583 rxconnp = cm_GetRxConn(connp);
4584 code = RXAFS_ReleaseLock(rxconnp, &tfid, &volSync);
4585 rx_PutConnection(rxconnp);
4587 } while (cm_Analyze(connp, userp, reqp, &cfid, &volSync,
4589 code = cm_MapRPCError(code, reqp);
4592 "CALL ReleaseLock FAILURE, code 0x%x", code);
4595 "CALL ReleaseLock SUCCESS");
4597 lock_ObtainWrite(&scp->rw);
4600 * The file server does not return a status structure so we must
4601 * locally track the file server lock count to the best of our
4605 if (scp->fsLockCount < 0)
4606 scp->fsLockCount = 0;
4609 return (code != CM_ERROR_BADFD ? code : 0);
4612 /* called with scp->rw held. May release it during processing, but
4613 will exit with lock held.
4617 - 0 if the user has permission to get the specified lock for the scp
4619 - CM_ERROR_NOACCESS if not
4621 Any other error from cm_SyncOp will be sent down untranslated.
4623 If CM_ERROR_NOACCESS is returned and lock_type is LockRead, then
4624 phas_insert (if non-NULL) will receive a boolean value indicating
4625 whether the user has INSERT permission or not.
4627 long cm_LockCheckPerms(cm_scache_t * scp,
4634 long code = 0, code2 = 0;
4636 /* lock permissions are slightly tricky because of the 'i' bit.
4637 If the user has PRSFS_LOCK, she can read-lock the file. If the
4638 user has PRSFS_WRITE, she can write-lock the file. However, if
4639 the user has PRSFS_INSERT, then she can write-lock new files,
4640 but not old ones. Since we don't have information about
4641 whether a file is new or not, we assume that if the user owns
4642 the scp, then she has the permissions that are granted by
4645 osi_Log3(afsd_logp, "cm_LockCheckPerms for scp[0x%p] type[%d] user[0x%p]",
4646 scp, lock_type, userp);
4648 if (lock_type == LockRead)
4649 rights |= PRSFS_LOCK;
4650 else if (lock_type == LockWrite)
4651 rights |= PRSFS_WRITE | PRSFS_LOCK;
4654 osi_assertx(FALSE, "invalid lock type");
4659 *phas_insert = FALSE;
4661 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
4662 CM_SCACHESYNC_GETSTATUS |
4663 CM_SCACHESYNC_NEEDCALLBACK);
4665 if (phas_insert && scp->creator == userp) {
4667 /* If this file was created by the user, then we check for
4668 PRSFS_INSERT. If the file server is recent enough, then
4669 this should be sufficient for her to get a write-lock (but
4670 not necessarily a read-lock). VICED_CAPABILITY_WRITELOCKACL
4671 indicates whether a file server supports getting write
4672 locks when the user only has PRSFS_INSERT.
4674 If the file was not created by the user we skip the check
4675 because the INSERT bit will not apply to this user even
4679 code2 = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
4680 CM_SCACHESYNC_GETSTATUS |
4681 CM_SCACHESYNC_NEEDCALLBACK);
4683 if (code2 == CM_ERROR_NOACCESS) {
4684 osi_Log0(afsd_logp, "cm_LockCheckPerms user has no INSERT bits");
4686 *phas_insert = TRUE;
4687 osi_Log0(afsd_logp, "cm_LockCheckPerms user has INSERT bits");
4691 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
4693 osi_Log1(afsd_logp, "cm_LockCheckPerms returning code %d", code);
4698 /* called with scp->rw held */
4699 long cm_Lock(cm_scache_t *scp, unsigned char sLockType,
4700 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
4702 int allowWait, cm_user_t *userp, cm_req_t *reqp,
4703 cm_file_lock_t **lockpp)
4706 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
4707 cm_file_lock_t *fileLock;
4710 int wait_unlock = FALSE;
4711 int force_client_lock = FALSE;
4713 osi_Log4(afsd_logp, "cm_Lock scp 0x%x type 0x%x offset %d length %d",
4714 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
4715 osi_Log4(afsd_logp, "... allowWait %d key <0x%x, 0x%x, 0x%x>", allowWait,
4716 key.process_id, key.session_id, key.file_id);
4719 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4721 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4724 3.1 If L->LockType is exclusive then there does NOT exist a
4725 ACCEPTED lock M in S->fileLocks such that _a_ in
4726 (M->LOffset,+M->LLength).
4728 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4729 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4730 M->LockType is shared.
4732 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4734 4.1 M->key != Key(C)
4736 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4737 and (M->LOffset,+M->LLength) do not intersect.
4740 range.offset = LOffset.QuadPart;
4741 range.length = LLength.QuadPart;
4743 lock_ObtainRead(&cm_scacheLock);
4745 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
4747 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4749 if (IS_LOCK_LOST(fileLock)) {
4750 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4751 code = CM_ERROR_BADFD;
4753 } else if (fileLock->lockType == LockWrite && INTERSECT_RANGE(range, fileLock->range)) {
4754 code = CM_ERROR_WOULDBLOCK;
4760 /* we don't need to check for deleted locks here since deleted
4761 locks are dequeued from scp->fileLocks */
4762 if (IS_LOCK_ACCEPTED(fileLock) &&
4763 INTERSECT_RANGE(range, fileLock->range)) {
4765 if ((sLockType & LOCKING_ANDX_SHARED_LOCK) == 0 ||
4766 fileLock->lockType != LockRead) {
4768 code = CM_ERROR_WOULDBLOCK;
4774 lock_ReleaseRead(&cm_scacheLock);
4776 if (code == 0 && SERVERLOCKS_ENABLED(scp)) {
4777 if (Which == scp->serverLock ||
4778 (Which == LockRead && scp->serverLock == LockWrite)) {
4782 /* we already have the lock we need */
4783 osi_Log3(afsd_logp, " we already have the correct lock. exclusives[%d], shared[%d], serverLock[%d]",
4784 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
4786 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4788 /* special case: if we don't have permission to read-lock
4789 the file, then we force a clientside lock. This is to
4790 compensate for applications that obtain a read-lock for
4791 reading files off of directories that don't grant
4792 read-locks to the user. */
4793 if (code == CM_ERROR_NOACCESS && Which == LockRead) {
4795 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4796 osi_Log0(afsd_logp, " User has no read-lock perms, but has INSERT perms.");
4799 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4800 force_client_lock = TRUE;
4804 } else if ((scp->exclusiveLocks > 0) ||
4805 (scp->sharedLocks > 0 && scp->serverLock != LockRead)) {
4808 /* We are already waiting for some other lock. We should
4809 wait for the daemon to catch up instead of generating a
4810 flood of SetLock calls. */
4811 osi_Log3(afsd_logp, " already waiting for other lock. exclusives[%d], shared[%d], serverLock[%d]",
4812 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
4814 /* see if we have permission to create the lock in the
4816 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4818 code = CM_ERROR_WOULDBLOCK;
4819 else if (code == CM_ERROR_NOACCESS && Which == LockRead) {
4821 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4823 " User has no read-lock perms, but has INSERT perms.");
4824 code = CM_ERROR_WOULDBLOCK;
4827 " User has no read-lock perms. Forcing client-side lock");
4828 force_client_lock = TRUE;
4832 /* leave any other codes as-is */
4836 int check_data_version = FALSE;
4839 /* first check if we have permission to elevate or obtain
4841 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4843 if (code == CM_ERROR_NOACCESS && Which == LockRead &&
4844 (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp))) {
4845 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4846 force_client_lock = TRUE;
4851 /* has_insert => (Which == LockRead, code == CM_ERROR_NOACCESS) */
4853 if (scp->serverLock == LockRead && Which == LockWrite) {
4855 /* We want to escalate the lock to a LockWrite.
4856 * Unfortunately that's not really possible without
4857 * letting go of the current lock. But for now we do
4861 " attempting to UPGRADE from LockRead to LockWrite.");
4863 " dataVersion on scp: %I64d", scp->dataVersion);
4865 /* we assume at this point (because scp->serverLock
4866 was valid) that we had a valid server lock. */
4867 scp->lockDataVersion = scp->dataVersion;
4868 check_data_version = TRUE;
4870 code = cm_IntReleaseLock(scp, userp, reqp);
4873 /* We couldn't release the lock */
4876 scp->serverLock = -1;
4880 /* We need to obtain a server lock of type Which in order
4881 * to assert this file lock */
4882 #ifndef AGGRESSIVE_LOCKS
4885 newLock = LockWrite;
4888 code = cm_IntSetLock(scp, userp, newLock, reqp);
4890 #ifdef AGGRESSIVE_LOCKS
4891 if ((code == CM_ERROR_WOULDBLOCK ||
4892 code == CM_ERROR_NOACCESS) && newLock != Which) {
4893 /* we wanted LockRead. We tried LockWrite. Now try
4898 osi_assertx(newLock == LockRead, "lock type not read");
4900 code = cm_IntSetLock(scp, userp, newLock, reqp);
4904 if (code == CM_ERROR_NOACCESS) {
4905 if (Which == LockRead) {
4906 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4908 /* We requested a read-lock, but we have permission to
4909 * get a write-lock. Try that */
4911 tcode = cm_LockCheckPerms(scp, LockWrite, userp, reqp, NULL);
4914 newLock = LockWrite;
4916 osi_Log0(afsd_logp, " User has 'i' perms and the request was for a LockRead. Trying to get a LockWrite instead");
4918 code = cm_IntSetLock(scp, userp, newLock, reqp);
4921 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4922 force_client_lock = TRUE;
4924 } else if (Which == LockWrite &&
4925 scp->creator == userp && !SCP_SUPPORTS_WRITELOCKACL(scp)) {
4928 /* Special case: if the lock request was for a
4929 * LockWrite and the user owns the file and we weren't
4930 * allowed to obtain the serverlock, we either lost a
4931 * race (the permissions changed from under us), or we
4932 * have 'i' bits, but we aren't allowed to lock the
4935 /* check if we lost a race... */
4936 tcode = cm_LockCheckPerms(scp, Which, userp, reqp, NULL);
4939 osi_Log0(afsd_logp, " User has 'i' perms but can't obtain write locks. Using client-side locks.");
4940 force_client_lock = TRUE;
4945 if (code == 0 && check_data_version &&
4946 scp->dataVersion != scp->lockDataVersion) {
4947 /* We lost a race. Although we successfully obtained
4948 * a lock, someone modified the file in between. The
4949 * locks have all been technically lost. */
4952 " Data version mismatch while upgrading lock.");
4954 " Data versions before=%I64d, after=%I64d",
4955 scp->lockDataVersion,
4958 " Releasing stale lock for scp 0x%x", scp);
4960 code = cm_IntReleaseLock(scp, userp, reqp);
4962 scp->serverLock = -1;
4964 code = CM_ERROR_INVAL;
4965 } else if (code == 0) {
4966 scp->serverLock = newLock;
4967 scp->lockDataVersion = scp->dataVersion;
4971 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
4972 scp->serverLock == -1) {
4973 /* Oops. We lost the lock. */
4974 cm_LockMarkSCacheLost(scp);
4977 } else if (code == 0) { /* server locks not enabled */
4979 " Skipping server lock for scp");
4984 if (code != 0 && !force_client_lock) {
4985 /* Special case error translations
4987 Applications don't expect certain errors from a
4988 LockFile/UnlockFile call. We need to translate some error
4989 code to codes that apps expect and handle. */
4991 /* We shouldn't actually need to handle this case since we
4992 simulate locks for RO scps anyway. */
4993 if (code == CM_ERROR_READONLY) {
4994 osi_Log0(afsd_logp, " Reinterpreting CM_ERROR_READONLY as CM_ERROR_NOACCESS");
4995 code = CM_ERROR_NOACCESS;
4999 if (code == 0 || (code == CM_ERROR_WOULDBLOCK && allowWait) ||
5000 force_client_lock) {
5002 /* clear the error if we are forcing a client lock, so we
5003 don't get confused later. */
5004 if (force_client_lock && code != CM_ERROR_WOULDBLOCK)
5009 lock_ObtainWrite(&cm_scacheLock);
5010 fileLock = cm_GetFileLock();
5012 fileLock->fid = scp->fid;
5014 fileLock->key = key;
5015 fileLock->lockType = Which;
5016 fileLock->userp = userp;
5017 fileLock->range = range;
5018 fileLock->flags = (code == 0 ? 0 :
5020 CM_FILELOCK_FLAG_WAITUNLOCK :
5021 CM_FILELOCK_FLAG_WAITLOCK));
5023 if (force_client_lock || !SERVERLOCKS_ENABLED(scp))
5024 fileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
5026 fileLock->lastUpdate = (code == 0 && !force_client_lock) ? time(NULL) : 0;
5028 osi_QAddT(&scp->fileLocksH, &scp->fileLocksT, &fileLock->fileq);
5029 cm_HoldSCacheNoLock(scp);
5030 fileLock->scp = scp;
5031 osi_QAdd(&cm_allFileLocks, &fileLock->q);
5032 lock_ReleaseWrite(&cm_scacheLock);
5038 if (IS_LOCK_CLIENTONLY(fileLock)) {
5040 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5041 if (Which == LockRead)
5044 scp->exclusiveLocks++;
5048 "cm_Lock Lock added 0x%p flags 0x%x to scp [0x%p]",
5049 fileLock, fileLock->flags, scp);
5051 " exclusives[%d] shared[%d] client[%d] serverLock[%d]",
5052 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5053 (int)(signed char) scp->serverLock);
5056 "cm_Lock Rejecting lock (code = 0x%x)", code);
5059 /* Convert from would block to lock not granted */
5060 if (code == CM_ERROR_WOULDBLOCK)
5061 code = CM_ERROR_LOCK_NOT_GRANTED;
5067 cm_IntUnlock(cm_scache_t * scp,
5073 osi_assertx(scp->sharedLocks >= 0, "scp->sharedLocks < 0");
5074 osi_assertx(scp->exclusiveLocks >= 0, "scp->exclusiveLocks < 0");
5075 osi_assertx(scp->clientLocks >= 0, "scp->clientLocks < 0");
5077 if (!SERVERLOCKS_ENABLED(scp)) {
5078 osi_Log0(afsd_logp, " Skipping server lock for scp");
5082 /* Ideally we would go through the rest of the locks to determine
5083 * if one or more locks that were formerly in WAITUNLOCK can now
5084 * be put to ACTIVE or WAITLOCK and update scp->exclusiveLocks and
5085 * scp->sharedLocks accordingly. However, the retrying of locks
5086 * in that manner is done cm_RetryLock() manually.
5089 if (scp->serverLock == LockWrite &&
5090 scp->exclusiveLocks == 0 &&
5091 scp->sharedLocks > 0) {
5092 /* The serverLock should be downgraded to LockRead */
5093 osi_Log0(afsd_logp, " DOWNGRADE lock from LockWrite to LockRead");
5095 /* Make sure there are no dirty buffers left. */
5096 code = cm_FSync(scp, userp, reqp, TRUE);
5098 /* since scp->serverLock looked sane, we are going to assume
5099 that we have a valid server lock. */
5100 scp->lockDataVersion = scp->dataVersion;
5101 osi_Log1(afsd_logp, " dataVersion on scp = %I64d", scp->dataVersion);
5103 /* before we downgrade, make sure that we have enough
5104 permissions to get the read lock. */
5105 code = cm_LockCheckPerms(scp, LockRead, userp, reqp, NULL);
5108 osi_Log0(afsd_logp, " SKIPPING downgrade because user doesn't have perms to get downgraded lock");
5114 code = cm_IntReleaseLock(scp, userp, reqp);
5117 /* so we couldn't release it. Just let the lock be for now */
5121 scp->serverLock = -1;
5124 code = cm_IntSetLock(scp, userp, LockRead, reqp);
5126 if (code == 0 && scp->lockDataVersion == scp->dataVersion) {
5127 scp->serverLock = LockRead;
5128 } else if (code == 0 && scp->lockDataVersion != scp->dataVersion) {
5129 /* We lost a race condition. Although we have a valid
5130 lock on the file, the data has changed and essentially
5131 we have lost the lock we had during the transition. */
5133 osi_Log0(afsd_logp, "Data version mismatch during lock downgrade");
5134 osi_Log2(afsd_logp, " Data versions before=%I64d, after=%I64d",
5135 scp->lockDataVersion,
5138 code = cm_IntReleaseLock(scp, userp, reqp);
5140 code = CM_ERROR_INVAL;
5141 scp->serverLock = -1;
5145 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5146 (scp->serverLock == -1)) {
5148 cm_LockMarkSCacheLost(scp);
5151 /* failure here has no bearing on the return value of cm_Unlock() */
5154 } else if (scp->serverLock != (-1) &&
5155 scp->exclusiveLocks == 0 &&
5156 scp->sharedLocks == 0) {
5157 /* The serverLock should be released entirely */
5159 if (scp->serverLock == LockWrite) {
5160 osi_Log0(afsd_logp, " RELEASE LockWrite -> LockNone");
5162 /* Make sure there are no dirty buffers left. */
5163 code = cm_FSync(scp, userp, reqp, TRUE);
5165 osi_Log0(afsd_logp, " RELEASE LockRead -> LockNone");
5168 code = cm_IntReleaseLock(scp, userp, reqp);
5171 scp->serverLock = (-1);
5177 /* Called with scp->rw held */
5178 long cm_UnlockByKey(cm_scache_t * scp,
5185 cm_file_lock_t *fileLock;
5186 osi_queue_t *q, *qn;
5189 osi_Log4(afsd_logp, "cm_UnlockByKey scp 0x%p key <0x%x,0x%x,0x%x",
5190 scp, key.process_id, key.session_id, key.file_id);
5191 osi_Log1(afsd_logp, " flags=0x%x", flags);
5193 lock_ObtainWrite(&cm_scacheLock);
5195 for (q = scp->fileLocksH; q; q = qn) {
5198 fileLock = (cm_file_lock_t *)
5199 ((char *) q - offsetof(cm_file_lock_t, fileq));
5202 osi_Log4(afsd_logp, " Checking lock[0x%x] range[%d,+%d] type[%d]",
5204 (unsigned long) fileLock->range.offset,
5205 (unsigned long) fileLock->range.length,
5206 fileLock->lockType);
5207 osi_Log4(afsd_logp, " key<0x%x, 0x%x, 0x%x> flags[0x%x]",
5208 fileLock->key.process_id, fileLock->key.session_id, fileLock->key.file_id,
5211 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5212 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5213 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5215 fileLock->fid.volume,
5216 fileLock->fid.vnode,
5217 fileLock->fid.unique);
5218 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5219 fileLock->scp->fid.cell,
5220 fileLock->scp->fid.volume,
5221 fileLock->scp->fid.vnode,
5222 fileLock->scp->fid.unique);
5223 osi_assertx(FALSE, "invalid fid value");
5227 if (!IS_LOCK_DELETED(fileLock) &&
5228 cm_KeyEquals(&fileLock->key, &key, flags)) {
5229 osi_Log3(afsd_logp, "...Unlock range [%d,+%d] type %d",
5230 fileLock->range.offset,
5231 fileLock->range.length,
5232 fileLock->lockType);
5234 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5236 if (IS_LOCK_CLIENTONLY(fileLock)) {
5238 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5239 if (fileLock->lockType == LockRead)
5242 scp->exclusiveLocks--;
5245 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5247 cm_ReleaseUser(fileLock->userp);
5248 cm_ReleaseSCacheNoLock(scp);
5250 fileLock->userp = NULL;
5251 fileLock->scp = NULL;
5257 lock_ReleaseWrite(&cm_scacheLock);
5259 if (n_unlocks == 0) {
5260 osi_Log0(afsd_logp, "cm_UnlockByKey no locks found");
5261 osi_Log3(afsd_logp, " Leaving scp with exclusives[%d], shared[%d], serverLock[%d]",
5262 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5267 code = cm_IntUnlock(scp, userp, reqp);
5268 osi_Log1(afsd_logp, "cm_UnlockByKey code 0x%x", code);
5270 osi_Log4(afsd_logp, " Leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5271 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5272 (int)(signed char) scp->serverLock);
5277 /* Called with scp->rw held */
5278 long cm_Unlock(cm_scache_t *scp,
5279 unsigned char sLockType,
5280 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
5287 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
5288 cm_file_lock_t *fileLock;
5290 int release_userp = FALSE;
5291 int exact_match = !(flags & CM_UNLOCK_FLAG_MATCH_RANGE);
5293 LARGE_INTEGER RangeEnd;
5295 osi_Log4(afsd_logp, "cm_Unlock scp 0x%p type 0x%x offset 0x%x length 0x%x",
5296 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
5297 osi_Log4(afsd_logp, "... key <0x%x,0x%x,0x%x> flags 0x%x",
5298 key.process_id, key.session_id, key.file_id, flags);
5301 RangeEnd.QuadPart = LOffset.QuadPart + LLength.QuadPart;
5304 lock_ObtainRead(&cm_scacheLock);
5306 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5307 fileLock = (cm_file_lock_t *)
5308 ((char *) q - offsetof(cm_file_lock_t, fileq));
5311 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5312 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5313 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5315 fileLock->fid.volume,
5316 fileLock->fid.vnode,
5317 fileLock->fid.unique);
5318 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5319 fileLock->scp->fid.cell,
5320 fileLock->scp->fid.volume,
5321 fileLock->scp->fid.vnode,
5322 fileLock->scp->fid.unique);
5323 osi_assertx(FALSE, "invalid fid value");
5327 if (!IS_LOCK_DELETED(fileLock) &&
5328 cm_KeyEquals(&fileLock->key, &key, 0) &&
5329 fileLock->range.offset == LOffset.QuadPart &&
5330 fileLock->range.length == LLength.QuadPart) {
5336 if (!IS_LOCK_DELETED(fileLock) &&
5337 cm_KeyEquals(&fileLock->key, &key, 0) &&
5338 fileLock->range.offset >= LOffset.QuadPart &&
5339 fileLock->range.offset < RangeEnd.QuadPart &&
5340 (fileLock->range.offset + fileLock->range.length) <= RangeEnd.QuadPart) {
5348 lock_ReleaseRead(&cm_scacheLock);
5350 if (lock_found && !exact_match) {
5354 osi_Log0(afsd_logp, "cm_Unlock lock not found; failure");
5356 /* The lock didn't exist anyway. *shrug* */
5357 return CM_ERROR_RANGE_NOT_LOCKED;
5361 /* discard lock record */
5362 lock_ConvertRToW(&cm_scacheLock);
5363 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5366 * Don't delete it here; let the daemon delete it, to simplify
5367 * the daemon's traversal of the list.
5370 if (IS_LOCK_CLIENTONLY(fileLock)) {
5372 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5373 if (fileLock->lockType == LockRead)
5376 scp->exclusiveLocks--;
5379 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5381 if (userp != NULL) {
5382 cm_ReleaseUser(fileLock->userp);
5384 userp = fileLock->userp;
5385 release_userp = TRUE;
5387 cm_ReleaseSCacheNoLock(scp);
5388 fileLock->userp = NULL;
5389 fileLock->scp = NULL;
5390 lock_ReleaseWrite(&cm_scacheLock);
5392 code = cm_IntUnlock(scp, userp, reqp);
5394 if (release_userp) {
5395 cm_ReleaseUser(userp);
5396 release_userp = FALSE;
5400 osi_Log1(afsd_logp, "cm_Unlock not exact match, searching for next lock, code 0x%x", code);
5401 goto try_again; /* might be more than one lock in the range */
5406 osi_Log1(afsd_logp, "cm_Unlock code 0x%x", code);
5407 osi_Log4(afsd_logp, " leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5408 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5409 (int)(signed char) scp->serverLock);
5414 /* called with scp->rw held */
5415 void cm_LockMarkSCacheLost(cm_scache_t * scp)
5417 cm_file_lock_t *fileLock;
5420 osi_Log1(afsd_logp, "cm_LockMarkSCacheLost scp 0x%x", scp);
5422 /* cm_scacheLock needed because we are modifying fileLock->flags */
5423 lock_ObtainWrite(&cm_scacheLock);
5425 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5427 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
5429 if (IS_LOCK_ACTIVE(fileLock) &&
5430 !IS_LOCK_CLIENTONLY(fileLock)) {
5431 if (fileLock->lockType == LockRead)
5434 scp->exclusiveLocks--;
5436 fileLock->flags |= CM_FILELOCK_FLAG_LOST;
5440 scp->serverLock = -1;
5441 scp->lockDataVersion = CM_SCACHE_VERSION_BAD;
5442 lock_ReleaseWrite(&cm_scacheLock);
5445 /* Called with no relevant locks held */
5446 void cm_CheckLocks()
5448 osi_queue_t *q, *nq;
5449 cm_file_lock_t *fileLock;
5455 struct rx_connection * rxconnp;
5458 memset(&volSync, 0, sizeof(volSync));
5462 lock_ObtainWrite(&cm_scacheLock);
5464 cm_lockRefreshCycle++;
5466 osi_Log1(afsd_logp, "cm_CheckLocks starting lock check cycle %d", cm_lockRefreshCycle);
5468 for (q = cm_allFileLocks; q; q = nq) {
5469 fileLock = (cm_file_lock_t *) q;
5473 if (IS_LOCK_DELETED(fileLock)) {
5474 cm_user_t *userp = fileLock->userp;
5475 cm_scache_t *scp = fileLock->scp;
5476 fileLock->userp = NULL;
5477 fileLock->scp = NULL;
5480 lock_ReleaseWrite(&cm_scacheLock);
5481 lock_ObtainWrite(&scp->rw);
5482 code = cm_IntUnlock(scp, userp, &req);
5483 lock_ReleaseWrite(&scp->rw);
5485 cm_ReleaseUser(userp);
5486 lock_ObtainWrite(&cm_scacheLock);
5487 cm_ReleaseSCacheNoLock(scp);
5489 osi_QRemove(&cm_allFileLocks, q);
5490 cm_PutFileLock(fileLock);
5492 } else if (IS_LOCK_ACTIVE(fileLock) && !IS_LOCK_CLIENTONLY(fileLock)) {
5494 /* Server locks must have been enabled for us to have
5495 received an active non-client-only lock. */
5496 osi_assertx(cm_enableServerLocks, "!cm_enableServerLocks");
5498 scp = fileLock->scp;
5499 osi_assertx(scp != NULL, "null cm_scache_t");
5501 cm_HoldSCacheNoLock(scp);
5504 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5505 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5506 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5508 fileLock->fid.volume,
5509 fileLock->fid.vnode,
5510 fileLock->fid.unique);
5511 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5512 fileLock->scp->fid.cell,
5513 fileLock->scp->fid.volume,
5514 fileLock->scp->fid.vnode,
5515 fileLock->scp->fid.unique);
5516 osi_assertx(FALSE, "invalid fid");
5519 /* Server locks are extended once per scp per refresh
5521 if (scp->lastRefreshCycle != cm_lockRefreshCycle) {
5523 int scp_done = FALSE;
5525 osi_Log1(afsd_logp, "cm_CheckLocks Updating scp 0x%x", scp);
5527 lock_ReleaseWrite(&cm_scacheLock);
5528 lock_ObtainWrite(&scp->rw);
5530 /* did the lock change while we weren't holding the lock? */
5531 if (!IS_LOCK_ACTIVE(fileLock))
5532 goto post_syncopdone;
5534 code = cm_SyncOp(scp, NULL, fileLock->userp, &req, 0,
5535 CM_SCACHESYNC_NEEDCALLBACK
5536 | CM_SCACHESYNC_GETSTATUS
5537 | CM_SCACHESYNC_LOCK);
5541 "cm_CheckLocks SyncOp failure code 0x%x", code);
5542 goto post_syncopdone;
5545 /* cm_SyncOp releases scp->rw during which the lock
5546 may get released. */
5547 if (!IS_LOCK_ACTIVE(fileLock))
5548 goto pre_syncopdone;
5550 if (scp->serverLock != -1 && !(scp->flags & CM_SCACHEFLAG_DELETED)) {
5554 tfid.Volume = scp->fid.volume;
5555 tfid.Vnode = scp->fid.vnode;
5556 tfid.Unique = scp->fid.unique;
5558 userp = fileLock->userp;
5560 osi_Log3(afsd_logp, "CALL ExtendLock lock 0x%p for scp=0x%p with lock %d",
5563 (int) scp->serverLock);
5565 lock_ReleaseWrite(&scp->rw);
5568 code = cm_ConnFromFID(&cfid, userp,
5573 rxconnp = cm_GetRxConn(connp);
5574 code = RXAFS_ExtendLock(rxconnp, &tfid,
5576 rx_PutConnection(rxconnp);
5578 osi_Log1(afsd_logp, " ExtendLock returns %d", code);
5580 } while (cm_Analyze(connp, userp, &req,
5581 &cfid, &volSync, NULL, NULL,
5584 code = cm_MapRPCError(code, &req);
5586 lock_ObtainWrite(&scp->rw);
5589 osi_Log1(afsd_logp, "CALL ExtendLock FAILURE, code 0x%x", code);
5590 scp->fsLockCount = 0;
5592 osi_Log0(afsd_logp, "CALL ExtendLock SUCCESS");
5593 scp->lockDataVersion = scp->dataVersion;
5596 if ((code == EINVAL || code == CM_ERROR_INVAL) &&
5597 scp->lockDataVersion == scp->dataVersion) {
5601 (scp->exclusiveLocks > 0) ? LockWrite: LockRead;
5603 /* we might still have a chance to obtain a
5606 code = cm_IntSetLock(scp, userp, lockType, &req);
5609 code = CM_ERROR_INVAL;
5610 } else if (scp->lockDataVersion != scp->dataVersion) {
5612 /* now check if we still have the file at
5613 the right data version. */
5615 "Data version mismatch on scp 0x%p",
5618 " Data versions: before=%I64d, after=%I64d",
5619 scp->lockDataVersion,
5622 code = cm_IntReleaseLock(scp, userp, &req);
5624 code = CM_ERROR_INVAL;
5628 if (code == EINVAL || code == CM_ERROR_INVAL ||
5629 code == CM_ERROR_BADFD) {
5630 cm_LockMarkSCacheLost(scp);
5634 /* interestingly, we have found an active lock
5635 belonging to an scache that has no
5637 cm_LockMarkSCacheLost(scp);
5644 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
5647 lock_ReleaseWrite(&scp->rw);
5649 lock_ObtainWrite(&cm_scacheLock);
5652 fileLock->lastUpdate = time(NULL);
5656 scp->lastRefreshCycle = cm_lockRefreshCycle;
5659 /* we have already refreshed the locks on this scp */
5660 fileLock->lastUpdate = time(NULL);
5663 cm_ReleaseSCacheNoLock(scp);
5665 } else if (IS_LOCK_ACTIVE(fileLock) && IS_LOCK_CLIENTONLY(fileLock)) {
5666 /* TODO: Check callbacks */
5670 lock_ReleaseWrite(&cm_scacheLock);
5671 osi_Log1(afsd_logp, "cm_CheckLocks completes lock check cycle %d", cm_lockRefreshCycle);
5674 /* NOT called with scp->rw held. */
5675 long cm_RetryLock(cm_file_lock_t *oldFileLock, int client_is_dead)
5678 cm_scache_t *scp = NULL;
5679 cm_file_lock_t *fileLock;
5683 int force_client_lock = FALSE;
5684 int has_insert = FALSE;
5685 int check_data_version = FALSE;
5689 if (client_is_dead) {
5690 code = CM_ERROR_TIMEDOUT;
5694 lock_ObtainRead(&cm_scacheLock);
5696 osi_Log2(afsd_logp, "cm_RetryLock checking lock %p (scp=%p)", oldFileLock, oldFileLock->scp);
5697 osi_Log4(afsd_logp, " offset(%x:%x) length(%x:%x)",
5698 (unsigned)(oldFileLock->range.offset >> 32),
5699 (unsigned)(oldFileLock->range.offset & 0xffffffff),
5700 (unsigned)(oldFileLock->range.length >> 32),
5701 (unsigned)(oldFileLock->range.length & 0xffffffff));
5702 osi_Log4(afsd_logp, " key<0x%x,0x%x,0x%x> flags=%x",
5703 oldFileLock->key.process_id, oldFileLock->key.session_id, oldFileLock->key.file_id,
5704 (unsigned)(oldFileLock->flags));
5706 /* if the lock has already been granted, then we have nothing to do */
5707 if (IS_LOCK_ACTIVE(oldFileLock)) {
5708 lock_ReleaseRead(&cm_scacheLock);
5709 osi_Log0(afsd_logp, "cm_RetryLock lock already granted");
5713 /* we can't do anything with lost or deleted locks at the moment. */
5714 if (IS_LOCK_LOST(oldFileLock) || IS_LOCK_DELETED(oldFileLock)) {
5715 code = CM_ERROR_BADFD;
5716 osi_Log0(afsd_logp, "cm_RetryLock lock is lost or deleted");
5717 lock_ReleaseRead(&cm_scacheLock);
5721 scp = oldFileLock->scp;
5723 osi_assertx(scp != NULL, "null cm_scache_t");
5725 lock_ReleaseRead(&cm_scacheLock);
5726 lock_ObtainWrite(&scp->rw);
5728 code = cm_LockCheckPerms(scp, oldFileLock->lockType,
5732 if (code == CM_ERROR_NOACCESS && oldFileLock->lockType == LockRead) {
5733 if (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp)) {
5734 force_client_lock = TRUE;
5738 lock_ReleaseWrite(&scp->rw);
5742 lock_ObtainWrite(&cm_scacheLock);
5744 /* Check if we already have a sufficient server lock to allow this
5745 lock to go through. */
5746 if (IS_LOCK_WAITLOCK(oldFileLock) &&
5747 (!SERVERLOCKS_ENABLED(scp) ||
5748 scp->serverLock == oldFileLock->lockType ||
5749 scp->serverLock == LockWrite)) {
5751 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5753 if (SERVERLOCKS_ENABLED(scp)) {
5754 osi_Log1(afsd_logp, "cm_RetryLock Server lock (%d) is sufficient for lock. Granting",
5755 (int) scp->serverLock);
5757 osi_Log0(afsd_logp, "cm_RetryLock skipping server lock for scp");
5760 lock_ReleaseWrite(&cm_scacheLock);
5761 lock_ReleaseWrite(&scp->rw);
5766 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
5768 /* check if the conflicting locks have dissappeared already */
5769 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5771 fileLock = (cm_file_lock_t *)
5772 ((char *) q - offsetof(cm_file_lock_t, fileq));
5774 if (IS_LOCK_LOST(fileLock)) {
5775 if (cm_KeyEquals(&fileLock->key, &oldFileLock->key, 0)) {
5776 code = CM_ERROR_BADFD;
5777 oldFileLock->flags |= CM_FILELOCK_FLAG_LOST;
5778 osi_Log1(afsd_logp, " found lost lock %p for same key. Marking lock as lost",
5781 } else if (fileLock->lockType == LockWrite &&
5782 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
5783 osi_Log1(afsd_logp, " found conflicting LOST lock %p", fileLock);
5784 code = CM_ERROR_WOULDBLOCK;
5789 if (IS_LOCK_ACCEPTED(fileLock) &&
5790 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
5792 if (oldFileLock->lockType != LockRead ||
5793 fileLock->lockType != LockRead) {
5795 osi_Log1(afsd_logp, " found conflicting lock %p", fileLock);
5796 code = CM_ERROR_WOULDBLOCK;
5804 lock_ReleaseWrite(&cm_scacheLock);
5805 lock_ReleaseWrite(&scp->rw);
5810 /* when we get here, the lock is either a WAITUNLOCK or WAITLOCK.
5811 If it is WAITUNLOCK, then we didn't find any conflicting lock
5812 but we haven't verfied whether the serverLock is sufficient to
5813 assert it. If it is WAITLOCK, then the serverLock is
5814 insufficient to assert it. Eitherway, we are ready to accept
5815 the lock as either ACTIVE or WAITLOCK depending on the
5818 /* First, promote the WAITUNLOCK to a WAITLOCK */
5819 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
5820 if (oldFileLock->lockType == LockRead)
5823 scp->exclusiveLocks++;
5825 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITUNLOCK;
5826 oldFileLock->flags |= CM_FILELOCK_FLAG_WAITLOCK;
5829 osi_assertx(IS_LOCK_WAITLOCK(oldFileLock), "!IS_LOCK_WAITLOCK");
5831 if (force_client_lock ||
5832 !SERVERLOCKS_ENABLED(scp) ||
5833 scp->serverLock == oldFileLock->lockType ||
5834 (oldFileLock->lockType == LockRead &&
5835 scp->serverLock == LockWrite)) {
5837 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5839 if ((force_client_lock ||
5840 !SERVERLOCKS_ENABLED(scp)) &&
5841 !IS_LOCK_CLIENTONLY(oldFileLock)) {
5843 oldFileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
5845 if (oldFileLock->lockType == LockRead)
5848 scp->exclusiveLocks--;
5853 lock_ReleaseWrite(&cm_scacheLock);
5854 lock_ReleaseWrite(&scp->rw);
5861 code = cm_SyncOp(scp, NULL, oldFileLock->userp, &req, 0,
5862 CM_SCACHESYNC_NEEDCALLBACK
5863 | CM_SCACHESYNC_GETSTATUS
5864 | CM_SCACHESYNC_LOCK);
5866 osi_Log1(afsd_logp, "cm_RetryLock SyncOp failure code 0x%x", code);
5867 lock_ReleaseWrite(&cm_scacheLock);
5868 goto post_syncopdone;
5871 if (!IS_LOCK_WAITLOCK(oldFileLock))
5872 goto pre_syncopdone;
5874 userp = oldFileLock->userp;
5876 #ifndef AGGRESSIVE_LOCKS
5877 newLock = oldFileLock->lockType;
5879 newLock = LockWrite;
5883 /* if has_insert is non-zero, then:
5884 - the lock a LockRead
5885 - we don't have permission to get a LockRead
5886 - we do have permission to get a LockWrite
5887 - the server supports VICED_CAPABILITY_WRITELOCKACL
5890 newLock = LockWrite;
5893 lock_ReleaseWrite(&cm_scacheLock);
5895 /* when we get here, either we have a read-lock and want a
5896 write-lock or we don't have any locks and we want some
5899 if (scp->serverLock == LockRead) {
5901 osi_assertx(newLock == LockWrite, "!LockWrite");
5903 osi_Log0(afsd_logp, " Attempting to UPGRADE from LockRead to LockWrite");
5905 scp->lockDataVersion = scp->dataVersion;
5906 check_data_version = TRUE;
5908 code = cm_IntReleaseLock(scp, userp, &req);
5911 goto pre_syncopdone;
5913 scp->serverLock = -1;
5916 code = cm_IntSetLock(scp, userp, newLock, &req);
5919 if (scp->dataVersion != scp->lockDataVersion) {
5920 /* we lost a race. too bad */
5923 " Data version mismatch while upgrading lock.");
5925 " Data versions before=%I64d, after=%I64d",
5926 scp->lockDataVersion,
5929 " Releasing stale lock for scp 0x%x", scp);
5931 code = cm_IntReleaseLock(scp, userp, &req);
5933 scp->serverLock = -1;
5935 code = CM_ERROR_INVAL;
5937 cm_LockMarkSCacheLost(scp);
5939 scp->serverLock = newLock;
5944 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
5950 if (code != 0 && code != CM_ERROR_WOULDBLOCK) {
5951 lock_ObtainWrite(&cm_scacheLock);
5952 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, &oldFileLock->fileq);
5953 lock_ReleaseWrite(&cm_scacheLock);
5955 lock_ReleaseWrite(&scp->rw);
5958 lock_ObtainWrite(&cm_scacheLock);
5960 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5961 } else if (code != CM_ERROR_WOULDBLOCK) {
5962 oldFileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5963 cm_ReleaseUser(oldFileLock->userp);
5964 oldFileLock->userp = NULL;
5965 if (oldFileLock->scp) {
5966 cm_ReleaseSCacheNoLock(oldFileLock->scp);
5967 oldFileLock->scp = NULL;
5970 lock_ReleaseWrite(&cm_scacheLock);
5975 cm_key_t cm_GenerateKey(afs_uint16 session_id, afs_offs_t process_id, afs_uint64 file_id)
5979 key.process_id = process_id;
5980 key.session_id = session_id;
5981 key.file_id = file_id;
5986 int cm_KeyEquals(cm_key_t *k1, cm_key_t *k2, int flags)
5988 return (k1->session_id == k2->session_id) && (k1->file_id == k2->file_id) &&
5989 ((flags & CM_UNLOCK_FLAG_BY_FID) || (k1->process_id == k2->process_id));
5992 void cm_ReleaseAllLocks(void)
5998 cm_file_lock_t *fileLock;
6001 for (i = 0; i < cm_data.scacheHashTableSize; i++)
6003 for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
6004 while (scp->fileLocksH != NULL) {
6005 lock_ObtainWrite(&scp->rw);
6006 lock_ObtainWrite(&cm_scacheLock);
6007 if (!scp->fileLocksH) {
6008 lock_ReleaseWrite(&cm_scacheLock);
6009 lock_ReleaseWrite(&scp->rw);
6012 fileLock = (cm_file_lock_t *)((char *) scp->fileLocksH - offsetof(cm_file_lock_t, fileq));
6013 userp = fileLock->userp;
6015 key = fileLock->key;
6016 cm_HoldSCacheNoLock(scp);
6017 lock_ReleaseWrite(&cm_scacheLock);
6018 cm_UnlockByKey(scp, key, 0, userp, &req);
6019 cm_ReleaseSCache(scp);
6020 cm_ReleaseUser(userp);
6021 lock_ReleaseWrite(&scp->rw);