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;
2405 struct rx_connection * rxconnp;
2406 int inlinebulk; /* Did we use InlineBulkStatus RPC or not? */
2408 memset(&volSync, 0, sizeof(volSync));
2410 /* otherwise, we may have one or more bulk stat's worth of stuff in bb;
2411 * make the calls to create the entries. Handle AFSCBMAX files at a
2414 for (filex = 0; filex < bbp->counter; filex += filesThisCall) {
2415 filesThisCall = bbp->counter - filex;
2416 if (filesThisCall > AFSCBMAX)
2417 filesThisCall = AFSCBMAX;
2419 fidStruct.AFSCBFids_len = filesThisCall;
2420 fidStruct.AFSCBFids_val = &bbp->fids[filex];
2421 statStruct.AFSBulkStats_len = filesThisCall;
2422 statStruct.AFSBulkStats_val = &bbp->stats[filex];
2423 callbackStruct.AFSCBs_len = filesThisCall;
2424 callbackStruct.AFSCBs_val = &bbp->callbacks[filex];
2425 cm_StartCallbackGrantingCall(NULL, &cbReq);
2426 osi_Log1(afsd_logp, "CALL BulkStatus, %d entries", filesThisCall);
2429 * Whenever cm_Analyze is called for a RXAFS_ RPC there must
2430 * be a FID provided. However, the error code from RXAFS_BulkStatus
2431 * or RXAFS_InlinkBulkStatus does not apply to any FID. Therefore,
2432 * we generate an invalid FID to match with the RPC error.
2434 cm_SetFid(&tfid, dscp->fid.cell, dscp->fid.volume, 0, 0);
2439 code = cm_ConnFromFID(&tfid, userp, reqp, &connp);
2443 rxconnp = cm_GetRxConn(connp);
2444 if (!(connp->serverp->flags & CM_SERVERFLAG_NOINLINEBULK)) {
2445 code = RXAFS_InlineBulkStatus(rxconnp, &fidStruct,
2446 &statStruct, &callbackStruct, &volSync);
2447 if (code == RXGEN_OPCODE) {
2448 cm_SetServerNoInlineBulk(connp->serverp, 0);
2454 code = RXAFS_BulkStatus(rxconnp, &fidStruct,
2455 &statStruct, &callbackStruct, &volSync);
2457 rx_PutConnection(rxconnp);
2460 * If InlineBulk RPC was called and it succeeded,
2461 * then pull out the return code from the status info
2462 * and use it for cm_Analyze so that we can failover to other
2463 * .readonly volume instances. But only do it for errors that
2464 * are volume global.
2466 if (inlinebulk && code == 0 && (&bbp->stats[0])->errorCode) {
2467 osi_Log1(afsd_logp, "cm_TryBulkStat inline-bulk stat error: %d",
2468 (&bbp->stats[0])->errorCode);
2469 switch ((&bbp->stats[0])->errorCode) {
2478 code = (&bbp->stats[0])->errorCode;
2481 /* Rx and Rxkad errors are volume global */
2482 if ( (&bbp->stats[0])->errorCode >= -64 && (&bbp->stats[0])->errorCode < 0 ||
2483 (&bbp->stats[0])->errorCode >= ERROR_TABLE_BASE_RXK && (&bbp->stats[0])->errorCode < ERROR_TABLE_BASE_RXK + 256)
2484 code = (&bbp->stats[0])->errorCode;
2487 } while (cm_Analyze(connp, userp, reqp, &tfid, &volSync, NULL, &cbReq, code));
2488 code = cm_MapRPCError(code, reqp);
2491 * might as well quit on an error, since we're not going to do
2492 * much better on the next immediate call, either.
2495 osi_Log2(afsd_logp, "CALL %sBulkStatus FAILURE code 0x%x",
2496 inlinebulk ? "Inline" : "", code);
2497 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2502 * The bulk RPC has succeeded or at least not failed with a
2503 * volume global error result. For items that have inlineBulk
2504 * errors we must call cm_Analyze in order to perform required
2505 * logging of errors.
2507 * If the RPC was not inline bulk or the entry either has no error
2508 * the status must be merged.
2510 osi_Log1(afsd_logp, "CALL %sBulkStatus SUCCESS", inlinebulk ? "Inline" : "");
2512 for (i = 0; i<filesThisCall; i++) {
2514 cm_SetFid(&tfid, dscp->fid.cell, bbp->fids[j].Volume, bbp->fids[j].Vnode, bbp->fids[j].Unique);
2516 if (inlinebulk && (&bbp->stats[j])->errorCode) {
2517 cm_req_t treq = *reqp;
2518 cm_Analyze(NULL, userp, &treq, &tfid, &volSync, NULL, &cbReq, (&bbp->stats[j])->errorCode);
2520 code = cm_GetSCache(&tfid, &scp, userp, reqp);
2525 * otherwise, if this entry has no callback info,
2526 * merge in this. If there is existing callback info
2527 * we skip the merge because the existing data must be
2528 * current (we have a callback) and the response from
2529 * a non-inline bulk rpc might actually be wrong.
2531 * now, we have to be extra paranoid on merging in this
2532 * information, since we didn't use cm_SyncOp before
2533 * starting the fetch to make sure that no bad races
2534 * were occurring. Specifically, we need to make sure
2535 * we don't obliterate any newer information in the
2536 * vnode than have here.
2538 * Right now, be pretty conservative: if there's a
2539 * callback or a pending call, skip it.
2540 * However, if the prior attempt to obtain status
2541 * was refused access or the volume is .readonly,
2542 * take the data in any case since we have nothing
2543 * better for the in flight directory enumeration that
2544 * resulted in this function being called.
2546 lock_ObtainRead(&scp->rw);
2547 if ((scp->cbServerp == NULL &&
2548 !(scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESTORING))) ||
2549 (scp->flags & CM_SCACHEFLAG_PURERO) ||
2550 (scp->flags & CM_SCACHEFLAG_EACCESS))
2552 lock_ConvertRToW(&scp->rw);
2553 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
2556 CM_CALLBACK_MAINTAINCOUNT);
2557 InterlockedIncrement(&scp->activeRPCs);
2559 cm_MergeStatus(dscp, scp, &bbp->stats[j], &volSync, userp, reqp, 0);
2560 lock_ReleaseWrite(&scp->rw);
2562 lock_ReleaseRead(&scp->rw);
2564 cm_ReleaseSCache(scp);
2566 } /* all files in the response */
2567 /* now tell it to drop the count,
2568 * after doing the vnode processing above */
2569 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2570 } /* while there are still more files to process */
2575 /* called with a write locked scp and a pointer to a buffer. Make bulk stat
2576 * calls on all undeleted files in the page of the directory specified.
2579 cm_TryBulkStat(cm_scache_t *dscp, osi_hyper_t *offsetp, cm_user_t *userp,
2585 osi_Log1(afsd_logp, "cm_TryBulkStat dir 0x%p", dscp);
2587 /* should be on a buffer boundary */
2588 osi_assertx((offsetp->LowPart & (cm_data.buf_blockSize - 1)) == 0, "invalid offset");
2590 bbp = malloc(sizeof(cm_bulkStat_t));
2591 memset(bbp, 0, sizeof(cm_bulkStat_t));
2592 bbp->bufOffset = *offsetp;
2594 lock_ReleaseWrite(&dscp->rw);
2595 /* first, assemble the file IDs we need to stat */
2596 code = cm_ApplyDir(dscp, cm_TryBulkProc, (void *) bbp, offsetp, userp, reqp, NULL);
2598 /* if we failed, bail out early */
2599 if (code && code != CM_ERROR_STOPNOW) {
2601 lock_ObtainWrite(&dscp->rw);
2605 code = cm_TryBulkStatRPC(dscp, bbp, userp, reqp);
2606 osi_Log1(afsd_logp, "END cm_TryBulkStat code 0x%x", code);
2608 lock_ObtainWrite(&dscp->rw);
2613 void cm_StatusFromAttr(AFSStoreStatus *statusp, cm_scache_t *scp, cm_attr_t *attrp)
2617 /* initialize store back mask as inexpensive local variable */
2619 memset(statusp, 0, sizeof(AFSStoreStatus));
2621 /* copy out queued info from scache first, if scp passed in */
2623 if (scp->mask & CM_SCACHEMASK_CLIENTMODTIME) {
2624 statusp->ClientModTime = scp->clientModTime;
2625 mask |= AFS_SETMODTIME;
2626 scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
2631 /* now add in our locally generated request */
2632 if (attrp->mask & CM_ATTRMASK_CLIENTMODTIME) {
2633 statusp->ClientModTime = attrp->clientModTime;
2634 mask |= AFS_SETMODTIME;
2636 if (attrp->mask & CM_ATTRMASK_UNIXMODEBITS) {
2637 statusp->UnixModeBits = attrp->unixModeBits;
2638 mask |= AFS_SETMODE;
2640 if (attrp->mask & CM_ATTRMASK_OWNER) {
2641 statusp->Owner = attrp->owner;
2642 mask |= AFS_SETOWNER;
2644 if (attrp->mask & CM_ATTRMASK_GROUP) {
2645 statusp->Group = attrp->group;
2646 mask |= AFS_SETGROUP;
2649 statusp->Mask = mask;
2652 /* set the file size, and make sure that all relevant buffers have been
2653 * truncated. Ensure that any partially truncated buffers have been zeroed
2654 * to the end of the buffer.
2656 long cm_SetLength(cm_scache_t *scp, osi_hyper_t *sizep, cm_user_t *userp,
2662 /* start by locking out buffer creation */
2663 lock_ObtainWrite(&scp->bufCreateLock);
2665 /* verify that this is a file, not a dir or a symlink */
2666 lock_ObtainWrite(&scp->rw);
2667 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
2668 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2671 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2673 if (scp->fileType != CM_SCACHETYPE_FILE) {
2674 code = CM_ERROR_ISDIR;
2679 if (LargeIntegerLessThan(*sizep, scp->length))
2684 lock_ReleaseWrite(&scp->rw);
2686 /* can't hold scp->rw lock here, since we may wait for a storeback to
2687 * finish if the buffer package is cleaning a buffer by storing it to
2691 buf_Truncate(scp, userp, reqp, sizep);
2693 /* now ensure that file length is short enough, and update truncPos */
2694 lock_ObtainWrite(&scp->rw);
2696 /* make sure we have a callback (so we have the right value for the
2697 * length), and wait for it to be safe to do a truncate.
2699 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_WRITE,
2700 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2701 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2703 /* If we only have 'i' bits, then we should still be able to set
2704 the size of a file we created. */
2705 if (code == CM_ERROR_NOACCESS && scp->creator == userp) {
2706 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
2707 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2708 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2714 if (LargeIntegerLessThan(*sizep, scp->length)) {
2715 /* a real truncation. If truncPos is not set yet, or is bigger
2716 * than where we're truncating the file, set truncPos to this
2721 if (!(scp->mask & CM_SCACHEMASK_TRUNCPOS)
2722 || LargeIntegerLessThan(*sizep, scp->length)) {
2724 scp->truncPos = *sizep;
2725 scp->mask |= CM_SCACHEMASK_TRUNCPOS;
2727 /* in either case, the new file size has been changed */
2728 scp->length = *sizep;
2729 scp->mask |= CM_SCACHEMASK_LENGTH;
2731 else if (LargeIntegerGreaterThan(*sizep, scp->length)) {
2732 /* really extending the file */
2733 scp->length = *sizep;
2734 scp->mask |= CM_SCACHEMASK_LENGTH;
2737 /* done successfully */
2740 cm_SyncOpDone(scp, NULL,
2741 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2742 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2745 lock_ReleaseWrite(&scp->rw);
2746 lock_ReleaseWrite(&scp->bufCreateLock);
2751 /* set the file size or other attributes (but not both at once) */
2752 long cm_SetAttr(cm_scache_t *scp, cm_attr_t *attrp, cm_user_t *userp,
2756 AFSFetchStatus afsOutStatus;
2760 AFSStoreStatus afsInStatus;
2761 struct rx_connection * rxconnp;
2763 memset(&volSync, 0, sizeof(volSync));
2765 /* handle file length setting */
2766 if (attrp->mask & CM_ATTRMASK_LENGTH)
2767 return cm_SetLength(scp, &attrp->length, userp, reqp);
2769 lock_ObtainWrite(&scp->rw);
2770 /* Check for RO volume */
2771 if (scp->flags & CM_SCACHEFLAG_RO) {
2772 code = CM_ERROR_READONLY;
2773 lock_ReleaseWrite(&scp->rw);
2777 /* otherwise, we have to make an RPC to get the status */
2778 code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STORESTATUS);
2780 lock_ReleaseWrite(&scp->rw);
2783 lock_ConvertWToR(&scp->rw);
2785 /* make the attr structure */
2786 cm_StatusFromAttr(&afsInStatus, scp, attrp);
2788 tfid.Volume = scp->fid.volume;
2789 tfid.Vnode = scp->fid.vnode;
2790 tfid.Unique = scp->fid.unique;
2791 lock_ReleaseRead(&scp->rw);
2793 /* now make the RPC */
2794 InterlockedIncrement(&scp->activeRPCs);
2796 osi_Log1(afsd_logp, "CALL StoreStatus scp 0x%p", scp);
2798 code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
2802 rxconnp = cm_GetRxConn(connp);
2803 code = RXAFS_StoreStatus(rxconnp, &tfid,
2804 &afsInStatus, &afsOutStatus, &volSync);
2805 rx_PutConnection(rxconnp);
2807 } while (cm_Analyze(connp, userp, reqp,
2808 &scp->fid, &volSync, NULL, NULL, code));
2809 code = cm_MapRPCError(code, reqp);
2812 osi_Log1(afsd_logp, "CALL StoreStatus FAILURE, code 0x%x", code);
2814 osi_Log0(afsd_logp, "CALL StoreStatus SUCCESS");
2816 lock_ObtainWrite(&scp->rw);
2818 cm_MergeStatus(NULL, scp, &afsOutStatus, &volSync, userp, reqp,
2819 CM_MERGEFLAG_FORCE|CM_MERGEFLAG_STOREDATA);
2821 InterlockedDecrement(&scp->activeRPCs);
2822 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STORESTATUS);
2824 /* if we're changing the mode bits, discard the ACL cache,
2825 * since we changed the mode bits.
2827 if (afsInStatus.Mask & AFS_SETMODE)
2828 cm_FreeAllACLEnts(scp);
2829 lock_ReleaseWrite(&scp->rw);
2833 long cm_Create(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
2834 cm_scache_t **scpp, cm_user_t *userp, cm_req_t *reqp)
2839 cm_callbackRequest_t cbReq;
2842 cm_scache_t *scp = NULL;
2845 AFSStoreStatus inStatus;
2846 AFSFetchStatus updatedDirStatus;
2847 AFSFetchStatus newFileStatus;
2848 AFSCallBack newFileCallback;
2850 struct rx_connection * rxconnp;
2852 fschar_t * fnamep = NULL;
2854 memset(&volSync, 0, sizeof(volSync));
2856 /* can't create names with @sys in them; must expand it manually first.
2857 * return "invalid request" if they try.
2859 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
2860 return CM_ERROR_ATSYS;
2863 #ifdef AFS_FREELANCE_CLIENT
2864 /* Freelance root volume does not hold files */
2865 if (cm_freelanceEnabled &&
2866 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
2867 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
2869 return CM_ERROR_NOACCESS;
2871 #endif /* AFS_FREELANCE_CLIENT */
2873 /* Check for RO volume */
2874 if (dscp->flags & CM_SCACHEFLAG_RO)
2875 return CM_ERROR_READONLY;
2877 /* before starting the RPC, mark that we're changing the file data, so
2878 * that someone who does a chmod will know to wait until our call
2881 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
2883 lock_ObtainWrite(&dscp->rw);
2884 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
2885 lock_ReleaseWrite(&dscp->rw);
2887 cm_StartCallbackGrantingCall(NULL, &cbReq);
2889 cm_EndDirOp(&dirop);
2896 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
2898 cm_StatusFromAttr(&inStatus, NULL, attrp);
2900 /* try the RPC now */
2901 InterlockedIncrement(&dscp->activeRPCs);
2902 osi_Log1(afsd_logp, "CALL CreateFile scp 0x%p", dscp);
2904 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
2908 dirAFSFid.Volume = dscp->fid.volume;
2909 dirAFSFid.Vnode = dscp->fid.vnode;
2910 dirAFSFid.Unique = dscp->fid.unique;
2912 rxconnp = cm_GetRxConn(connp);
2913 code = RXAFS_CreateFile(connp->rxconnp, &dirAFSFid, fnamep,
2914 &inStatus, &newAFSFid, &newFileStatus,
2915 &updatedDirStatus, &newFileCallback,
2917 rx_PutConnection(rxconnp);
2919 } while (cm_Analyze(connp, userp, reqp,
2920 &dscp->fid, &volSync, NULL, &cbReq, code));
2921 code = cm_MapRPCError(code, reqp);
2924 osi_Log1(afsd_logp, "CALL CreateFile FAILURE, code 0x%x", code);
2926 osi_Log0(afsd_logp, "CALL CreateFile SUCCESS");
2929 lock_ObtainWrite(&dirop.scp->dirlock);
2930 dirop.lockType = CM_DIRLOCK_WRITE;
2932 lock_ObtainWrite(&dscp->rw);
2934 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
2935 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
2936 if (cm_CheckDirOpForSingleChange(&dirop)) {
2937 lock_ReleaseWrite(&dscp->rw);
2938 cm_DirCreateEntry(&dirop, fnamep, &newFid);
2940 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
2942 lock_ObtainWrite(&dscp->rw);
2945 InterlockedDecrement(&dscp->activeRPCs);
2947 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
2948 lock_ReleaseWrite(&dscp->rw);
2950 /* now try to create the file's entry, too, but be careful to
2951 * make sure that we don't merge in old info. Since we weren't locking
2952 * out any requests during the file's creation, we may have pretty old
2956 code = cm_GetSCache(&newFid, &scp, userp, reqp);
2958 lock_ObtainWrite(&scp->rw);
2959 scp->creator = userp; /* remember who created it */
2960 if (!cm_HaveCallback(scp)) {
2961 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
2962 &newFileCallback, &volSync, 0);
2963 InterlockedIncrement(&scp->activeRPCs);
2965 cm_MergeStatus(dscp, scp, &newFileStatus, &volSync,
2969 lock_ReleaseWrite(&scp->rw);
2973 /* make sure we end things properly */
2975 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2977 cm_EndDirOp(&dirop);
2986 cm_ReleaseSCache(scp);
2992 * locked if TRUE means write-locked
2993 * else the cm_scache_t rw must not be held
2995 long cm_FSync(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp, afs_uint32 locked)
3000 lock_ReleaseWrite(&scp->rw);
3002 osi_Log2(afsd_logp, "cm_FSync scp 0x%p userp 0x%p", scp, userp);
3004 code = buf_CleanVnode(scp, userp, reqp);
3006 lock_ObtainWrite(&scp->rw);
3008 if (scp->mask & (CM_SCACHEMASK_TRUNCPOS
3009 | CM_SCACHEMASK_CLIENTMODTIME
3010 | CM_SCACHEMASK_LENGTH))
3011 code = cm_StoreMini(scp, userp, reqp);
3013 if (scp->flags & (CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE)) {
3014 code = (scp->flags & CM_SCACHEFLAG_OVERQUOTA) ? CM_ERROR_QUOTA : CM_ERROR_SPACE;
3015 scp->flags &= ~(CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE);
3019 lock_ReleaseWrite(&scp->rw);
3020 } else if (locked) {
3021 lock_ObtainWrite(&scp->rw);
3026 long cm_MakeDir(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
3027 cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3032 cm_callbackRequest_t cbReq;
3035 cm_scache_t *scp = NULL;
3038 AFSStoreStatus inStatus;
3039 AFSFetchStatus updatedDirStatus;
3040 AFSFetchStatus newDirStatus;
3041 AFSCallBack newDirCallback;
3043 struct rx_connection * rxconnp;
3045 fschar_t * fnamep = NULL;
3047 memset(&volSync, 0, sizeof(volSync));
3049 /* can't create names with @sys in them; must expand it manually first.
3050 * return "invalid request" if they try.
3052 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
3053 return CM_ERROR_ATSYS;
3056 #ifdef AFS_FREELANCE_CLIENT
3057 /* Freelance root volume does not hold subdirectories */
3058 if (cm_freelanceEnabled &&
3059 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
3060 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
3062 return CM_ERROR_NOACCESS;
3064 #endif /* AFS_FREELANCE_CLIENT */
3066 /* Check for RO volume */
3067 if (dscp->flags & CM_SCACHEFLAG_RO)
3068 return CM_ERROR_READONLY;
3070 /* before starting the RPC, mark that we're changing the directory
3071 * data, so that someone who does a chmod on the dir will wait until
3072 * our call completes.
3074 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3076 lock_ObtainWrite(&dscp->rw);
3077 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3078 lock_ReleaseWrite(&dscp->rw);
3080 cm_StartCallbackGrantingCall(NULL, &cbReq);
3082 cm_EndDirOp(&dirop);
3089 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3090 cm_StatusFromAttr(&inStatus, NULL, attrp);
3092 /* try the RPC now */
3093 InterlockedIncrement(&dscp->activeRPCs);
3094 osi_Log1(afsd_logp, "CALL MakeDir scp 0x%p", dscp);
3096 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3100 dirAFSFid.Volume = dscp->fid.volume;
3101 dirAFSFid.Vnode = dscp->fid.vnode;
3102 dirAFSFid.Unique = dscp->fid.unique;
3104 rxconnp = cm_GetRxConn(connp);
3105 code = RXAFS_MakeDir(connp->rxconnp, &dirAFSFid, fnamep,
3106 &inStatus, &newAFSFid, &newDirStatus,
3107 &updatedDirStatus, &newDirCallback,
3109 rx_PutConnection(rxconnp);
3111 } while (cm_Analyze(connp, userp, reqp,
3112 &dscp->fid, &volSync, NULL, &cbReq, code));
3113 code = cm_MapRPCError(code, reqp);
3116 osi_Log1(afsd_logp, "CALL MakeDir FAILURE, code 0x%x", code);
3118 osi_Log0(afsd_logp, "CALL MakeDir SUCCESS");
3121 lock_ObtainWrite(&dirop.scp->dirlock);
3122 dirop.lockType = CM_DIRLOCK_WRITE;
3124 lock_ObtainWrite(&dscp->rw);
3126 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3127 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3128 if (cm_CheckDirOpForSingleChange(&dirop)) {
3129 lock_ReleaseWrite(&dscp->rw);
3130 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3132 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3134 lock_ObtainWrite(&dscp->rw);
3137 InterlockedDecrement(&dscp->activeRPCs);
3139 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3140 lock_ReleaseWrite(&dscp->rw);
3142 /* now try to create the new dir's entry, too, but be careful to
3143 * make sure that we don't merge in old info. Since we weren't locking
3144 * out any requests during the file's creation, we may have pretty old
3148 code = cm_GetSCache(&newFid, &scp, userp, reqp);
3150 lock_ObtainWrite(&scp->rw);
3151 if (!cm_HaveCallback(scp)) {
3152 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
3153 &newDirCallback, &volSync, 0);
3154 InterlockedIncrement(&scp->activeRPCs);
3156 cm_MergeStatus(dscp, scp, &newDirStatus, &volSync,
3160 lock_ReleaseWrite(&scp->rw);
3164 /* make sure we end things properly */
3166 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
3168 cm_EndDirOp(&dirop);
3176 cm_ReleaseSCache(scp);
3179 /* and return error code */
3183 long cm_Link(cm_scache_t *dscp, clientchar_t *cnamep, cm_scache_t *sscp, long flags,
3184 cm_user_t *userp, cm_req_t *reqp)
3189 AFSFid existingAFSFid;
3190 AFSFetchStatus updatedDirStatus;
3191 AFSFetchStatus newLinkStatus;
3193 struct rx_connection * rxconnp;
3195 fschar_t * fnamep = NULL;
3198 memset(&volSync, 0, sizeof(volSync));
3200 if (dscp->fid.cell != sscp->fid.cell ||
3201 dscp->fid.volume != sscp->fid.volume) {
3202 return CM_ERROR_CROSSDEVLINK;
3205 /* Check for RO volume */
3206 if (dscp->flags & CM_SCACHEFLAG_RO)
3207 return CM_ERROR_READONLY;
3209 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3211 lock_ObtainWrite(&dscp->rw);
3212 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3213 lock_ReleaseWrite(&dscp->rw);
3215 cm_EndDirOp(&dirop);
3220 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3222 /* try the RPC now */
3223 InterlockedIncrement(&dscp->activeRPCs);
3224 osi_Log1(afsd_logp, "CALL Link scp 0x%p", dscp);
3226 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3229 dirAFSFid.Volume = dscp->fid.volume;
3230 dirAFSFid.Vnode = dscp->fid.vnode;
3231 dirAFSFid.Unique = dscp->fid.unique;
3233 existingAFSFid.Volume = sscp->fid.volume;
3234 existingAFSFid.Vnode = sscp->fid.vnode;
3235 existingAFSFid.Unique = sscp->fid.unique;
3237 rxconnp = cm_GetRxConn(connp);
3238 code = RXAFS_Link(rxconnp, &dirAFSFid, fnamep, &existingAFSFid,
3239 &newLinkStatus, &updatedDirStatus, &volSync);
3240 rx_PutConnection(rxconnp);
3241 osi_Log1(afsd_logp," RXAFS_Link returns 0x%x", code);
3243 } while (cm_Analyze(connp, userp, reqp,
3244 &dscp->fid, &volSync, NULL, NULL, code));
3246 code = cm_MapRPCError(code, reqp);
3249 osi_Log1(afsd_logp, "CALL Link FAILURE, code 0x%x", code);
3251 osi_Log0(afsd_logp, "CALL Link SUCCESS");
3254 lock_ObtainWrite(&dirop.scp->dirlock);
3255 dirop.lockType = CM_DIRLOCK_WRITE;
3257 lock_ObtainWrite(&dscp->rw);
3259 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3262 if (cm_CheckDirOpForSingleChange(&dirop)) {
3263 lock_ReleaseWrite(&dscp->rw);
3264 cm_DirCreateEntry(&dirop, fnamep, &sscp->fid);
3266 cm_BPlusDirCreateEntry(&dirop, cnamep, &sscp->fid);
3268 lock_ObtainWrite(&dscp->rw);
3271 InterlockedDecrement(&dscp->activeRPCs);
3273 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3274 lock_ReleaseWrite(&dscp->rw);
3276 cm_EndDirOp(&dirop);
3278 if (invalidate && RDR_Initialized)
3279 RDR_InvalidateObject(dscp->fid.cell, dscp->fid.volume, dscp->fid.vnode,
3280 dscp->fid.unique, dscp->fid.hash,
3281 dscp->fileType, AFS_INVALIDATE_DATA_VERSION);
3283 /* Update the linked object status */
3285 lock_ObtainWrite(&sscp->rw);
3286 InterlockedIncrement(&sscp->activeRPCs);
3287 cm_MergeStatus(NULL, sscp, &newLinkStatus, &volSync, userp, reqp, 0);
3288 lock_ReleaseWrite(&sscp->rw);
3296 long cm_SymLink(cm_scache_t *dscp, clientchar_t *cnamep, fschar_t *contentsp, long flags,
3297 cm_attr_t *attrp, cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3305 AFSStoreStatus inStatus;
3306 AFSFetchStatus updatedDirStatus;
3307 AFSFetchStatus newLinkStatus;
3309 struct rx_connection * rxconnp;
3311 fschar_t *fnamep = NULL;
3316 /* Check for RO volume */
3317 if (dscp->flags & CM_SCACHEFLAG_RO)
3318 return CM_ERROR_READONLY;
3320 memset(&volSync, 0, sizeof(volSync));
3322 /* before starting the RPC, mark that we're changing the directory data,
3323 * so that someone who does a chmod on the dir will wait until our
3326 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3328 lock_ObtainWrite(&dscp->rw);
3329 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3330 lock_ReleaseWrite(&dscp->rw);
3332 cm_EndDirOp(&dirop);
3337 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3339 cm_StatusFromAttr(&inStatus, NULL, attrp);
3341 /* try the RPC now */
3342 InterlockedIncrement(&dscp->activeRPCs);
3343 osi_Log1(afsd_logp, "CALL Symlink scp 0x%p", dscp);
3345 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3349 dirAFSFid.Volume = dscp->fid.volume;
3350 dirAFSFid.Vnode = dscp->fid.vnode;
3351 dirAFSFid.Unique = dscp->fid.unique;
3353 rxconnp = cm_GetRxConn(connp);
3354 code = RXAFS_Symlink(rxconnp, &dirAFSFid, fnamep, contentsp,
3355 &inStatus, &newAFSFid, &newLinkStatus,
3356 &updatedDirStatus, &volSync);
3357 rx_PutConnection(rxconnp);
3359 } while (cm_Analyze(connp, userp, reqp,
3360 &dscp->fid, &volSync, NULL, NULL, code));
3361 code = cm_MapRPCError(code, reqp);
3364 osi_Log1(afsd_logp, "CALL Symlink FAILURE, code 0x%x", code);
3366 osi_Log0(afsd_logp, "CALL Symlink SUCCESS");
3369 lock_ObtainWrite(&dirop.scp->dirlock);
3370 dirop.lockType = CM_DIRLOCK_WRITE;
3372 lock_ObtainWrite(&dscp->rw);
3374 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3375 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3376 if (cm_CheckDirOpForSingleChange(&dirop)) {
3377 lock_ReleaseWrite(&dscp->rw);
3378 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3380 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3382 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3384 lock_ObtainWrite(&dscp->rw);
3387 InterlockedDecrement(&dscp->activeRPCs);
3389 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3390 lock_ReleaseWrite(&dscp->rw);
3392 cm_EndDirOp(&dirop);
3394 /* now try to create the new dir's entry, too, but be careful to
3395 * make sure that we don't merge in old info. Since we weren't locking
3396 * out any requests during the file's creation, we may have pretty old
3400 code = cm_GetSCache(&newFid, &scp, userp, reqp);
3402 lock_ObtainWrite(&scp->rw);
3403 if (!cm_HaveCallback(scp)) {
3404 InterlockedIncrement(&scp->activeRPCs);
3405 cm_MergeStatus(dscp, scp, &newLinkStatus, &volSync,
3408 lock_ReleaseWrite(&scp->rw);
3413 cm_ReleaseSCache(scp);
3420 /* and return error code */
3424 /*! \brief Remove a directory
3426 Encapsulates a call to RXAFS_RemoveDir().
3428 \param[in] dscp cm_scache_t for the directory containing the
3429 directory to be removed.
3431 \param[in] fnamep This will be the original name of the directory
3432 as known to the file server. It will be passed in to RXAFS_RemoveDir().
3433 This parameter is optional. If it is not provided the value
3436 \param[in] cnamep Normalized name used to update the local
3439 \param[in] userp cm_user_t for the request.
3441 \param[in] reqp Request tracker.
3443 long cm_RemoveDir(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t *cnamep, cm_user_t *userp, cm_req_t *reqp)
3449 AFSFetchStatus updatedDirStatus;
3451 struct rx_connection * rxconnp;
3453 cm_scache_t *scp = NULL;
3454 int free_fnamep = FALSE;
3456 memset(&volSync, 0, sizeof(volSync));
3458 if (fnamep == NULL) {
3461 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
3462 CM_DIROP_FLAG_NONE, &dirop);
3464 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
3467 cm_EndDirOp(&dirop);
3474 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
3478 /* Check for RO volume */
3479 if (dscp->flags & CM_SCACHEFLAG_RO) {
3480 code = CM_ERROR_READONLY;
3484 /* before starting the RPC, mark that we're changing the directory data,
3485 * so that someone who does a chmod on the dir will wait until our
3488 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3490 lock_ObtainWrite(&dscp->rw);
3491 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3492 lock_ReleaseWrite(&dscp->rw);
3494 cm_EndDirOp(&dirop);
3499 /* try the RPC now */
3500 InterlockedIncrement(&dscp->activeRPCs);
3501 osi_Log1(afsd_logp, "CALL RemoveDir scp 0x%p", dscp);
3503 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3507 dirAFSFid.Volume = dscp->fid.volume;
3508 dirAFSFid.Vnode = dscp->fid.vnode;
3509 dirAFSFid.Unique = dscp->fid.unique;
3511 rxconnp = cm_GetRxConn(connp);
3512 code = RXAFS_RemoveDir(rxconnp, &dirAFSFid, fnamep,
3513 &updatedDirStatus, &volSync);
3514 rx_PutConnection(rxconnp);
3516 } while (cm_Analyze(connp, userp, reqp,
3517 &dscp->fid, &volSync, NULL, NULL, code));
3518 code = cm_MapRPCErrorRmdir(code, reqp);
3521 osi_Log1(afsd_logp, "CALL RemoveDir FAILURE, code 0x%x", code);
3523 osi_Log0(afsd_logp, "CALL RemoveDir SUCCESS");
3526 lock_ObtainWrite(&dirop.scp->dirlock);
3527 dirop.lockType = CM_DIRLOCK_WRITE;
3529 lock_ObtainWrite(&dscp->rw);
3531 cm_dnlcRemove(dscp, cnamep);
3532 cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3533 if (cm_CheckDirOpForSingleChange(&dirop) && cnamep != NULL) {
3534 lock_ReleaseWrite(&dscp->rw);
3535 cm_DirDeleteEntry(&dirop, fnamep);
3537 cm_BPlusDirDeleteEntry(&dirop, cnamep);
3539 lock_ObtainWrite(&dscp->rw);
3542 InterlockedDecrement(&dscp->activeRPCs);
3544 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3545 lock_ReleaseWrite(&dscp->rw);
3547 cm_EndDirOp(&dirop);
3550 cm_ReleaseSCache(scp);
3552 lock_ObtainWrite(&scp->rw);
3553 scp->flags |= CM_SCACHEFLAG_DELETED;
3554 lock_ObtainWrite(&cm_scacheLock);
3555 cm_AdjustScacheLRU(scp);
3556 cm_RemoveSCacheFromHashTable(scp);
3557 lock_ReleaseWrite(&cm_scacheLock);
3558 lock_ReleaseWrite(&scp->rw);
3559 if (RDR_Initialized && !(reqp->flags & CM_REQ_SOURCE_REDIR) &&
3560 !RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode,
3561 scp->fid.unique, scp->fid.hash,
3562 scp->fileType, AFS_INVALIDATE_DELETED))
3563 buf_ClearRDRFlag(scp, "rmdir");
3571 /* and return error code */
3575 long cm_Open(cm_scache_t *scp, int type, cm_user_t *userp)
3577 /* grab mutex on contents */
3578 lock_ObtainWrite(&scp->rw);
3580 /* reset the prefetch info */
3581 scp->prefetch.base.LowPart = 0; /* base */
3582 scp->prefetch.base.HighPart = 0;
3583 scp->prefetch.end.LowPart = 0; /* and end */
3584 scp->prefetch.end.HighPart = 0;
3586 /* release mutex on contents */
3587 lock_ReleaseWrite(&scp->rw);
3593 /*! \brief Rename a file or directory
3595 Encapsulates a RXAFS_Rename() call.
3597 \param[in] oldDscp cm_scache_t for the directory containing the old
3600 \param[in] oldNamep The original old name known to the file server.
3601 This is the name that will be passed into the RXAFS_Rename().
3602 If it is not provided, it will be looked up.
3604 \param[in] normalizedOldNamep Normalized old name. This is used for
3605 updating local directory caches.
3607 \param[in] newDscp cm_scache_t for the directory containing the new
3610 \param[in] newNamep New name. Normalized.
3612 \param[in] userp cm_user_t for the request.
3614 \param[in,out] reqp Request tracker.
3617 long cm_Rename(cm_scache_t *oldDscp, fschar_t *oldNamep, clientchar_t *cOldNamep,
3618 cm_scache_t *newDscp, clientchar_t *cNewNamep, cm_user_t *userp,
3623 AFSFid oldDirAFSFid;
3624 AFSFid newDirAFSFid;
3625 AFSFetchStatus updatedOldDirStatus;
3626 AFSFetchStatus updatedNewDirStatus;
3629 int bTargetExists = 0;
3630 struct rx_connection * rxconnp;
3631 cm_dirOp_t oldDirOp;
3634 cm_dirOp_t newDirOp;
3635 fschar_t * newNamep = NULL;
3636 int free_oldNamep = FALSE;
3637 cm_scache_t *oldScp = NULL, *oldTargetScp = NULL;
3638 int rpc_skipped = 0;
3640 memset(&volSync, 0, sizeof(volSync));
3642 if (cOldNamep == NULL || cNewNamep == NULL ||
3643 cm_ClientStrLen(cOldNamep) == 0 ||
3644 cm_ClientStrLen(cNewNamep) == 0)
3645 return CM_ERROR_INVAL;
3647 /* check for identical names */
3648 if (oldDscp == newDscp &&
3649 cm_ClientStrCmp(cOldNamep, cNewNamep) == 0) {
3650 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_RENAME_IDENTICAL",
3652 return CM_ERROR_RENAME_IDENTICAL;
3655 /* Check for RO volume */
3656 if ((oldDscp->flags & CM_SCACHEFLAG_RO) || (newDscp->flags & CM_SCACHEFLAG_RO)) {
3657 return CM_ERROR_READONLY;
3660 if (oldNamep == NULL) {
3663 code = cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_READ,
3664 CM_DIROP_FLAG_NONE, &oldDirOp);
3666 code = cm_BPlusDirLookupOriginalName(&oldDirOp, cOldNamep, &oldNamep);
3668 free_oldNamep = TRUE;
3669 cm_EndDirOp(&oldDirOp);
3673 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S Original Name lookup failed",
3674 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3679 /* before starting the RPC, mark that we're changing the directory data,
3680 * so that someone who does a chmod on the dir will wait until our call
3681 * completes. We do this in vnode order so that we don't deadlock,
3682 * which makes the code a little verbose.
3684 if (oldDscp == newDscp) {
3686 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3687 CM_DIROP_FLAG_NONE, &oldDirOp);
3688 lock_ObtainWrite(&oldDscp->rw);
3689 cm_dnlcRemove(oldDscp, cOldNamep);
3690 cm_dnlcRemove(oldDscp, cNewNamep);
3691 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3692 CM_SCACHESYNC_STOREDATA);
3693 lock_ReleaseWrite(&oldDscp->rw);
3695 cm_EndDirOp(&oldDirOp);
3699 /* two distinct dir vnodes */
3701 if (oldDscp->fid.cell != newDscp->fid.cell ||
3702 oldDscp->fid.volume != newDscp->fid.volume) {
3703 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_CROSSDEVLINK",
3705 code = CM_ERROR_CROSSDEVLINK;
3709 /* shouldn't happen that we have distinct vnodes for two
3710 * different files, but could due to deliberate attack, or
3711 * stale info. Avoid deadlocks and quit now.
3713 if (oldDscp->fid.vnode == newDscp->fid.vnode) {
3714 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p vnode collision",
3716 code = CM_ERROR_CROSSDEVLINK;
3720 if (oldDscp->fid.vnode < newDscp->fid.vnode) {
3721 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3722 CM_DIROP_FLAG_NONE, &oldDirOp);
3723 lock_ObtainWrite(&oldDscp->rw);
3724 cm_dnlcRemove(oldDscp, cOldNamep);
3725 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3726 CM_SCACHESYNC_STOREDATA);
3727 lock_ReleaseWrite(&oldDscp->rw);
3729 cm_EndDirOp(&oldDirOp);
3731 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3732 CM_DIROP_FLAG_NONE, &newDirOp);
3733 lock_ObtainWrite(&newDscp->rw);
3734 cm_dnlcRemove(newDscp, cNewNamep);
3735 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3736 CM_SCACHESYNC_STOREDATA);
3737 lock_ReleaseWrite(&newDscp->rw);
3739 cm_EndDirOp(&newDirOp);
3741 /* cleanup first one */
3742 lock_ObtainWrite(&oldDscp->rw);
3743 cm_SyncOpDone(oldDscp, NULL,
3744 CM_SCACHESYNC_STOREDATA);
3745 lock_ReleaseWrite(&oldDscp->rw);
3746 cm_EndDirOp(&oldDirOp);
3751 /* lock the new vnode entry first */
3752 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3753 CM_DIROP_FLAG_NONE, &newDirOp);
3754 lock_ObtainWrite(&newDscp->rw);
3755 cm_dnlcRemove(newDscp, cNewNamep);
3756 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3757 CM_SCACHESYNC_STOREDATA);
3758 lock_ReleaseWrite(&newDscp->rw);
3760 cm_EndDirOp(&newDirOp);
3762 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3763 CM_DIROP_FLAG_NONE, &oldDirOp);
3764 lock_ObtainWrite(&oldDscp->rw);
3765 cm_dnlcRemove(oldDscp, cOldNamep);
3766 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3767 CM_SCACHESYNC_STOREDATA);
3768 lock_ReleaseWrite(&oldDscp->rw);
3770 cm_EndDirOp(&oldDirOp);
3772 /* cleanup first one */
3773 lock_ObtainWrite(&newDscp->rw);
3774 cm_SyncOpDone(newDscp, NULL,
3775 CM_SCACHESYNC_STOREDATA);
3776 lock_ReleaseWrite(&newDscp->rw);
3777 cm_EndDirOp(&newDirOp);
3781 } /* two distinct vnodes */
3787 * The source and destination directories are now locked and no other local
3788 * changes can occur.
3790 * Before we permit the operation, make sure that we do not already have
3791 * an object in the destination directory that has a case-insensitive match
3792 * for this name UNLESS the matching object is the object we are renaming.
3794 code = cm_Lookup(oldDscp, cOldNamep, 0, userp, reqp, &oldScp);
3796 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S old name lookup failed",
3797 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3802 /* Case sensitive lookup. If this succeeds we are done. */
3803 code = cm_Lookup(newDscp, cNewNamep, 0, userp, reqp, &oldTargetScp);
3806 * Case insensitive lookup. If this succeeds, it could have found the
3807 * same file with a name that differs only by case or it could be a
3808 * different file entirely.
3810 code = cm_Lookup(newDscp, cNewNamep, CM_FLAG_CASEFOLD, userp, reqp, &oldTargetScp);
3812 /* found a matching object with the new name */
3813 if (cm_FidCmp(&oldScp->fid, &oldTargetScp->fid)) {
3814 /* and they don't match so return an error */
3815 osi_Log2(afsd_logp, "cm_Rename newDscp 0x%p cNewName %S new name already exists",
3816 newDscp, osi_LogSaveStringW(afsd_logp, cNewNamep));
3817 code = CM_ERROR_EXISTS;
3819 cm_ReleaseSCache(oldTargetScp);
3820 oldTargetScp = NULL;
3821 } else if (code == CM_ERROR_AMBIGUOUS_FILENAME) {
3822 code = CM_ERROR_EXISTS;
3824 /* The target does not exist. Clear the error and perform the rename. */
3836 newNamep = cm_ClientStringToFsStringAlloc(cNewNamep, -1, NULL);
3838 /* try the RPC now */
3839 InterlockedIncrement(&oldDscp->activeRPCs);
3841 InterlockedIncrement(&newDscp->activeRPCs);
3842 osi_Log2(afsd_logp, "CALL Rename old scp 0x%p new scp 0x%p",
3845 code = cm_ConnFromFID(&oldDscp->fid, userp, reqp, &connp);
3849 oldDirAFSFid.Volume = oldDscp->fid.volume;
3850 oldDirAFSFid.Vnode = oldDscp->fid.vnode;
3851 oldDirAFSFid.Unique = oldDscp->fid.unique;
3852 newDirAFSFid.Volume = newDscp->fid.volume;
3853 newDirAFSFid.Vnode = newDscp->fid.vnode;
3854 newDirAFSFid.Unique = newDscp->fid.unique;
3856 rxconnp = cm_GetRxConn(connp);
3857 code = RXAFS_Rename(rxconnp, &oldDirAFSFid, oldNamep,
3858 &newDirAFSFid, newNamep,
3859 &updatedOldDirStatus, &updatedNewDirStatus,
3861 rx_PutConnection(rxconnp);
3863 } while (cm_Analyze(connp, userp, reqp, &oldDscp->fid,
3864 &volSync, NULL, NULL, code));
3865 code = cm_MapRPCError(code, reqp);
3868 osi_Log1(afsd_logp, "CALL Rename FAILURE, code 0x%x", code);
3870 osi_Log0(afsd_logp, "CALL Rename SUCCESS");
3873 /* update the individual stat cache entries for the directories */
3875 lock_ObtainWrite(&oldDirOp.scp->dirlock);
3876 oldDirOp.lockType = CM_DIRLOCK_WRITE;
3879 lock_ObtainWrite(&oldDscp->rw);
3881 cm_MergeStatus(NULL, oldDscp, &updatedOldDirStatus, &volSync,
3882 userp, reqp, CM_MERGEFLAG_DIROP);
3883 if (cm_CheckDirOpForSingleChange(&oldDirOp)) {
3884 lock_ReleaseWrite(&oldDscp->rw);
3885 if (bTargetExists && oneDir) {
3886 diropCode = cm_DirDeleteEntry(&oldDirOp, newNamep);
3888 cm_BPlusDirDeleteEntry(&oldDirOp, cNewNamep);
3893 diropCode = cm_BPlusDirLookup(&oldDirOp, cOldNamep, &fileFid);
3894 if (diropCode == CM_ERROR_INEXACT_MATCH)
3896 else if (diropCode == EINVAL)
3898 diropCode = cm_DirLookup(&oldDirOp, oldNamep, &fileFid);
3900 if (diropCode == 0) {
3902 diropCode = cm_DirCreateEntry(&oldDirOp, newNamep, &fileFid);
3904 cm_BPlusDirCreateEntry(&oldDirOp, cNewNamep, &fileFid);
3908 if (diropCode == 0) {
3909 diropCode = cm_DirDeleteEntry(&oldDirOp, oldNamep);
3911 cm_BPlusDirDeleteEntry(&oldDirOp, cOldNamep);
3915 lock_ObtainWrite(&oldDscp->rw);
3919 InterlockedDecrement(&oldDscp->activeRPCs);
3921 cm_SyncOpDone(oldDscp, NULL, CM_SCACHESYNC_STOREDATA);
3922 lock_ReleaseWrite(&oldDscp->rw);
3924 cm_EndDirOp(&oldDirOp);
3926 /* and update it for the new one, too, if necessary */
3929 lock_ObtainWrite(&newDirOp.scp->dirlock);
3930 newDirOp.lockType = CM_DIRLOCK_WRITE;
3932 lock_ObtainWrite(&newDscp->rw);
3934 cm_MergeStatus(NULL, newDscp, &updatedNewDirStatus, &volSync,
3935 userp, reqp, CM_MERGEFLAG_DIROP);
3938 * we only make the local change if we successfully made
3939 * the change in the old directory AND there was only one
3940 * change in the new directory
3942 if (diropCode == 0 && cm_CheckDirOpForSingleChange(&newDirOp)) {
3943 lock_ReleaseWrite(&newDscp->rw);
3945 if (bTargetExists && !oneDir) {
3946 diropCode = cm_DirDeleteEntry(&newDirOp, newNamep);
3948 cm_BPlusDirDeleteEntry(&newDirOp, cNewNamep);
3952 cm_DirCreateEntry(&newDirOp, newNamep, &fileFid);
3954 cm_BPlusDirCreateEntry(&newDirOp, cNewNamep, &fileFid);
3956 lock_ObtainWrite(&newDscp->rw);
3960 InterlockedIncrement(&newDscp->activeRPCs);
3962 cm_SyncOpDone(newDscp, NULL, CM_SCACHESYNC_STOREDATA);
3963 lock_ReleaseWrite(&newDscp->rw);
3965 cm_EndDirOp(&newDirOp);
3970 * After the rename the file server has invalidated the callbacks
3971 * on the file that was moved and destroyed any target file.
3973 lock_ObtainWrite(&oldScp->rw);
3974 cm_DiscardSCache(oldScp);
3975 lock_ReleaseWrite(&oldScp->rw);
3977 if (RDR_Initialized)
3978 RDR_InvalidateObject(oldScp->fid.cell, oldScp->fid.volume, oldScp->fid.vnode, oldScp->fid.unique,
3979 oldScp->fid.hash, oldScp->fileType, AFS_INVALIDATE_CALLBACK);
3982 lock_ObtainWrite(&oldTargetScp->rw);
3983 cm_DiscardSCache(oldTargetScp);
3984 lock_ReleaseWrite(&oldTargetScp->rw);
3986 if (RDR_Initialized)
3987 RDR_InvalidateObject(oldTargetScp->fid.cell, oldTargetScp->fid.volume, oldTargetScp->fid.vnode, oldTargetScp->fid.unique,
3988 oldTargetScp->fid.hash, oldTargetScp->fileType, AFS_INVALIDATE_CALLBACK);
3994 cm_ReleaseSCache(oldScp);
3997 cm_ReleaseSCache(oldTargetScp);
4004 /* and return error code */
4008 /* Byte range locks:
4010 The OpenAFS Windows client has to fake byte range locks given no
4011 server side support for such locks. This is implemented as keyed
4012 byte range locks on the cache manager.
4014 Keyed byte range locks:
4016 Each cm_scache_t structure keeps track of a list of keyed locks.
4017 The key for a lock identifies an owner of a set of locks (referred
4018 to as a client). Each key is represented by a value. The set of
4019 key values used within a specific cm_scache_t structure form a
4020 namespace that has a scope of just that cm_scache_t structure. The
4021 same key value can be used with another cm_scache_t structure and
4022 correspond to a completely different client. However it is
4023 advantageous for the SMB or IFS layer to make sure that there is a
4024 1-1 mapping between client and keys over all cm_scache_t objects.
4026 Assume a client C has key Key(C) (although, since the scope of the
4027 key is a cm_scache_t, the key can be Key(C,S), where S is the
4028 cm_scache_t. But assume a 1-1 relation between keys and clients).
4029 A byte range (O,+L) denotes byte addresses (O) through (O+L-1)
4030 inclusive (a.k.a. [O,O+L-1]). The function Key(x) is implemented
4031 through cm_generateKey() function for both SMB and IFS.
4033 The list of locks for a cm_scache_t object S is maintained in
4034 S->fileLocks. The cache manager will set a lock on the AFS file
4035 server in order to assert the locks in S->fileLocks. If only
4036 shared locks are in place for S, then the cache manager will obtain
4037 a LockRead lock, while if there are any exclusive locks, it will
4038 obtain a LockWrite lock. If the exclusive locks are all released
4039 while the shared locks remain, then the cache manager will
4040 downgrade the lock from LockWrite to LockRead. Similarly, if an
4041 exclusive lock is obtained when only shared locks exist, then the
4042 cache manager will try to upgrade the lock from LockRead to
4045 Each lock L owned by client C maintains a key L->key such that
4046 L->key == Key(C), the effective range defined by L->LOffset and
4047 L->LLength such that the range of bytes affected by the lock is
4048 (L->LOffset, +L->LLength), a type maintained in L->LockType which
4049 is either exclusive or shared.
4053 A lock exists iff it is in S->fileLocks for some cm_scache_t
4054 S. Existing locks are in one of the following states: ACTIVE,
4055 WAITLOCK, WAITUNLOCK, LOST, DELETED.
4057 The following sections describe each lock and the associated
4060 1. ACTIVE: A lock L is ACTIVE iff the cache manager has asserted
4061 the lock with the AFS file server. This type of lock can be
4062 exercised by a client to read or write to the locked region (as
4065 1.1 ACTIVE->LOST: When the AFS file server fails to extend a
4066 server lock that was required to assert the lock. Before
4067 marking the lock as lost, the cache manager checks if the file
4068 has changed on the server. If the file has not changed, then
4069 the cache manager will attempt to obtain a new server lock
4070 that is sufficient to assert the client side locks for the
4071 file. If any of these fail, the lock is marked as LOST.
4072 Otherwise, it is left as ACTIVE.
4074 1.2 ACTIVE->DELETED: Lock is released.
4076 2. WAITLOCK: A lock is in a WAITLOCK state if the cache manager
4077 grants the lock but the lock is yet to be asserted with the AFS
4078 file server. Once the file server grants the lock, the state
4079 will transition to an ACTIVE lock.
4081 2.1 WAITLOCK->ACTIVE: The server granted the lock.
4083 2.2 WAITLOCK->DELETED: Lock is abandoned, or timed out during
4086 2.3 WAITLOCK->LOST: One or more locks from this client were
4087 marked as LOST. No further locks will be granted to this
4088 client until all lost locks are removed.
4090 3. WAITUNLOCK: A lock is in a WAITUNLOCK state if the cache manager
4091 receives a request for a lock that conflicts with an existing
4092 ACTIVE or WAITLOCK lock. The lock will be placed in the queue
4093 and will be granted at such time the conflicting locks are
4094 removed, at which point the state will transition to either
4097 3.1 WAITUNLOCK->ACTIVE: The conflicting lock was removed. The
4098 current serverLock is sufficient to assert this lock, or a
4099 sufficient serverLock is obtained.
4101 3.2 WAITUNLOCK->WAITLOCK: The conflicting lock was removed,
4102 however the required serverLock is yet to be asserted with the
4105 3.3 WAITUNLOCK->DELETED: The lock is abandoned, timed out or
4108 3.5 WAITUNLOCK->LOST: One or more locks from this client were
4109 marked as LOST. No further locks will be granted to this
4110 client until all lost locks are removed.
4112 4. LOST: A lock L is LOST if the server lock that was required to
4113 assert the lock could not be obtained or if it could not be
4114 extended, or if other locks by the same client were LOST.
4115 Essentially, once a lock is LOST, the contract between the cache
4116 manager and that specific client is no longer valid.
4118 The cache manager rechecks the server lock once every minute and
4119 extends it as appropriate. If this is not done for 5 minutes,
4120 the AFS file server will release the lock (the 5 minute timeout
4121 is based on current file server code and is fairly arbitrary).
4122 Once released, the lock cannot be re-obtained without verifying
4123 that the contents of the file hasn't been modified since the
4124 time the lock was released. Re-obtaining the lock without
4125 verifying this may lead to data corruption. If the lock can not
4126 be obtained safely, then all active locks for the cm_scache_t
4129 4.1 LOST->DELETED: The lock is released.
4131 5. DELETED: The lock is no longer relevant. Eventually, it will
4132 get removed from the cm_scache_t. In the meantime, it will be
4133 treated as if it does not exist.
4135 5.1 DELETED->not exist: The lock is removed from the
4138 The following are classifications of locks based on their state.
4140 6* A lock L is ACCEPTED if it is ACTIVE or WAITLOCK. These locks
4141 have been accepted by the cache manager, but may or may not have
4142 been granted back to the client.
4144 7* A lock L is QUEUED if it is ACTIVE, WAITLOCK or WAITUNLOCK.
4146 8* A lock L is WAITING if it is WAITLOCK or WAITUNLOCK.
4150 A client C can READ range (Offset,+Length) of a file represented by
4151 cm_scache_t S iff (1):
4153 1. for all _a_ in (Offset,+Length), all of the following is true:
4155 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4156 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4159 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4160 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4163 (When locks are lost on an cm_scache_t, all locks are lost. By
4164 4.2 (below), if there is an exclusive LOST lock, then there
4165 can't be any overlapping ACTIVE locks.)
4167 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4169 2. for all _a_ in (Offset,+Length), one of the following is true:
4171 2.1 Byte _a_ of S is unowned (as specified in 1.1) AND there
4172 does not exist a LOST lock L such that _a_ in
4173 (L->LOffset,+L->LLength).
4175 2.2 Byte _a_ of S is owned by C under lock L (as specified in
4176 1.2) AND L->LockType is exclusive.
4178 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4180 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4183 3.1 If L->LockType is exclusive then there does NOT exist a
4184 ACCEPTED lock M in S->fileLocks such that _a_ in
4185 (M->LOffset,+M->LLength).
4187 (If we count all QUEUED locks then we hit cases such as
4188 cascading waiting locks where the locks later on in the queue
4189 can be granted without compromising file integrity. On the
4190 other hand if only ACCEPTED locks are considered, then locks
4191 that were received earlier may end up waiting for locks that
4192 were received later to be unlocked. The choice of ACCEPTED
4193 locks was made to mimic the Windows byte range lock
4196 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4197 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4198 M->LockType is shared.
4200 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4202 4.1 M->key != Key(C)
4204 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4205 and (M->LOffset,+M->LLength) do not intersect.
4207 (Note: If a client loses a lock, it loses all locks.
4208 Subsequently, it will not be allowed to obtain any more locks
4209 until all existing LOST locks that belong to the client are
4210 released. Once all locks are released by a single client,
4211 there exists no further contract between the client and AFS
4212 about the contents of the file, hence the client can then
4213 proceed to obtain new locks and establish a new contract.
4215 This doesn't quite work as you think it should, because most
4216 applications aren't built to deal with losing locks they
4217 thought they once had. For now, we don't have a good
4218 solution to lost locks.
4220 Also, for consistency reasons, we have to hold off on
4221 granting locks that overlap exclusive LOST locks.)
4223 A client C can only unlock locks L in S->fileLocks which have
4226 The representation and invariants are as follows:
4228 - Each cm_scache_t structure keeps:
4230 - A queue of byte-range locks (cm_scache_t::fileLocks) which
4231 are of type cm_file_lock_t.
4233 - A record of the highest server-side lock that has been
4234 obtained for this object (cm_scache_t::serverLock), which is
4235 one of (-1), LockRead, LockWrite.
4237 - A count of ACCEPTED exclusive and shared locks that are in the
4238 queue (cm_scache_t::sharedLocks and
4239 cm_scache_t::exclusiveLocks)
4241 - Each cm_file_lock_t structure keeps:
4243 - The type of lock (cm_file_lock_t::LockType)
4245 - The key associated with the lock (cm_file_lock_t::key)
4247 - The offset and length of the lock (cm_file_lock_t::LOffset
4248 and cm_file_lock_t::LLength)
4250 - The state of the lock.
4252 - Time of issuance or last successful extension
4254 Semantic invariants:
4256 I1. The number of ACCEPTED locks in S->fileLocks are
4257 (S->sharedLocks + S->exclusiveLocks)
4259 External invariants:
4261 I3. S->serverLock is the lock that we have asserted with the
4262 AFS file server for this cm_scache_t.
4264 I4. S->serverLock == LockRead iff there is at least one ACTIVE
4265 shared lock, but no ACTIVE exclusive locks.
4267 I5. S->serverLock == LockWrite iff there is at least one ACTIVE
4270 I6. If L is a LOST lock, then for each lock M in S->fileLocks,
4271 M->key == L->key IMPLIES M is LOST or DELETED.
4276 #define IS_LOCK_ACTIVE(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == 0)
4278 #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)
4280 #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)
4282 #define IS_LOCK_LOST(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_LOST)
4284 #define IS_LOCK_DELETED(lockp) (((lockp)->flags & CM_FILELOCK_FLAG_DELETED) == CM_FILELOCK_FLAG_DELETED)
4287 #define IS_LOCK_ACCEPTED(lockp) (IS_LOCK_ACTIVE(lockp) || IS_LOCK_WAITLOCK(lockp))
4290 #define IS_LOCK_CLIENTONLY(lockp) ((((lockp)->scp->flags & CM_SCACHEFLAG_RO) == CM_SCACHEFLAG_RO) || (((lockp)->flags & CM_FILELOCK_FLAG_CLIENTONLY) == CM_FILELOCK_FLAG_CLIENTONLY))
4293 #define INTERSECT_RANGE(r1,r2) (((r2).offset+(r2).length) > (r1).offset && ((r1).offset +(r1).length) > (r2).offset)
4296 #define CONTAINS_RANGE(r1,r2) (((r2).offset+(r2).length) <= ((r1).offset+(r1).length) && (r1).offset <= (r2).offset)
4298 #if defined(VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS) && !defined(LOCK_TESTING)
4299 #define SCP_SUPPORTS_BRLOCKS(scp) ((scp)->cbServerp && ((scp)->cbServerp->capabilities & VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS))
4301 #define SCP_SUPPORTS_BRLOCKS(scp) (1)
4304 #define SERVERLOCKS_ENABLED(scp) (!((scp)->flags & CM_SCACHEFLAG_RO) && cm_enableServerLocks && SCP_SUPPORTS_BRLOCKS(scp))
4306 #if defined(VICED_CAPABILITY_WRITELOCKACL)
4307 #define SCP_SUPPORTS_WRITELOCKACL(scp) ((scp)->cbServerp && ((scp->cbServerp->capabilities & VICED_CAPABILITY_WRITELOCKACL)))
4309 #define SCP_SUPPORTS_WRITELOCKACL(scp) (0)
4311 /* This should really be defined in any build that this code is being
4313 #error VICED_CAPABILITY_WRITELOCKACL not defined.
4316 static void cm_LockRangeSubtract(cm_range_t * pos, const cm_range_t * neg)
4318 afs_int64 int_begin;
4321 int_begin = max(pos->offset, neg->offset);
4322 int_end = min(pos->offset+pos->length, neg->offset+neg->length);
4324 if (int_begin < int_end) {
4325 if (int_begin == pos->offset) {
4326 pos->length = pos->offset + pos->length - int_end;
4327 pos->offset = int_end;
4328 } else if (int_end == pos->offset + pos->length) {
4329 pos->length = int_begin - pos->offset;
4332 /* We only subtract ranges if the resulting range is
4333 contiguous. If we try to support non-contigous ranges, we
4334 aren't actually improving performance. */
4338 /* Called with scp->rw held. Returns 0 if all is clear to read the
4339 specified range by the client identified by key.
4341 long cm_LockCheckRead(cm_scache_t *scp,
4342 LARGE_INTEGER LOffset,
4343 LARGE_INTEGER LLength,
4346 #ifndef ADVISORY_LOCKS
4348 cm_file_lock_t *fileLock;
4352 int substract_ranges = FALSE;
4354 range.offset = LOffset.QuadPart;
4355 range.length = LLength.QuadPart;
4359 1. for all _a_ in (Offset,+Length), all of the following is true:
4361 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4362 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4365 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4366 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4371 lock_ObtainRead(&cm_scacheLock);
4373 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4375 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4377 if (INTERSECT_RANGE(range, fileLock->range)) {
4378 if (IS_LOCK_ACTIVE(fileLock)) {
4379 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4381 /* If there is an active lock for this client, it
4382 is safe to substract ranges.*/
4383 cm_LockRangeSubtract(&range, &fileLock->range);
4384 substract_ranges = TRUE;
4386 if (fileLock->lockType != LockRead) {
4387 code = CM_ERROR_LOCK_CONFLICT;
4391 /* even if the entire range is locked for reading,
4392 we still can't grant the lock at this point
4393 because the client may have lost locks. That
4394 is, unless we have already seen an active lock
4395 belonging to the client, in which case there
4396 can't be any lost locks for this client. */
4397 if (substract_ranges)
4398 cm_LockRangeSubtract(&range, &fileLock->range);
4400 } else if (IS_LOCK_LOST(fileLock) &&
4401 (cm_KeyEquals(&fileLock->key, &key, 0) || fileLock->lockType == LockWrite)) {
4402 code = CM_ERROR_BADFD;
4408 lock_ReleaseRead(&cm_scacheLock);
4410 osi_Log4(afsd_logp, "cm_LockCheckRead scp 0x%x offset %d length %d code 0x%x",
4411 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4422 /* Called with scp->rw held. Returns 0 if all is clear to write the
4423 specified range by the client identified by key.
4425 long cm_LockCheckWrite(cm_scache_t *scp,
4426 LARGE_INTEGER LOffset,
4427 LARGE_INTEGER LLength,
4430 #ifndef ADVISORY_LOCKS
4432 cm_file_lock_t *fileLock;
4437 range.offset = LOffset.QuadPart;
4438 range.length = LLength.QuadPart;
4441 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4443 2. for all _a_ in (Offset,+Length), one of the following is true:
4445 2.1 Byte _a_ of S is unowned AND there does not exist a LOST
4446 lock L such that _a_ in (L->LOffset,+L->LLength).
4448 2.2 Byte _a_ of S is owned by C under lock L AND L->LockType is
4452 lock_ObtainRead(&cm_scacheLock);
4454 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4456 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4458 if (INTERSECT_RANGE(range, fileLock->range)) {
4459 if (IS_LOCK_ACTIVE(fileLock)) {
4460 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4461 if (fileLock->lockType == LockWrite) {
4463 /* if there is an active lock for this client, it
4464 is safe to substract ranges */
4465 cm_LockRangeSubtract(&range, &fileLock->range);
4467 code = CM_ERROR_LOCK_CONFLICT;
4471 code = CM_ERROR_LOCK_CONFLICT;
4474 } else if (IS_LOCK_LOST(fileLock)) {
4475 code = CM_ERROR_BADFD;
4481 lock_ReleaseRead(&cm_scacheLock);
4483 osi_Log4(afsd_logp, "cm_LockCheckWrite scp 0x%x offset %d length %d code 0x%x",
4484 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4495 /* Called with cm_scacheLock write locked */
4496 static cm_file_lock_t * cm_GetFileLock(void) {
4499 l = (cm_file_lock_t *) cm_freeFileLocks;
4501 osi_QRemove(&cm_freeFileLocks, &l->q);
4503 l = malloc(sizeof(cm_file_lock_t));
4504 osi_assertx(l, "null cm_file_lock_t");
4507 memset(l, 0, sizeof(cm_file_lock_t));
4512 /* Called with cm_scacheLock write locked */
4513 static void cm_PutFileLock(cm_file_lock_t *l) {
4514 osi_QAdd(&cm_freeFileLocks, &l->q);
4517 /* called with scp->rw held. May release it during processing, but
4518 leaves it held on exit. */
4519 long cm_IntSetLock(cm_scache_t * scp, cm_user_t * userp, int lockType,
4525 struct rx_connection * rxconnp;
4527 afs_uint32 reqflags = reqp->flags;
4529 osi_Log2(afsd_logp, "CALL SetLock scp 0x%p for lock %d", scp, lockType);
4531 if ((lockType != LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount != 0) ||
4532 (lockType == LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount < 0))
4534 code = CM_ERROR_LOCK_NOT_GRANTED;
4535 osi_Log2(afsd_logp, "CALL SetLock FAILURE, fsLockCount %d code 0x%x", scp->fsLockCount, code);
4539 memset(&volSync, 0, sizeof(volSync));
4541 tfid.Volume = scp->fid.volume;
4542 tfid.Vnode = scp->fid.vnode;
4543 tfid.Unique = scp->fid.unique;
4546 reqp->flags |= CM_REQ_NORETRY;
4547 lock_ReleaseWrite(&scp->rw);
4550 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4554 rxconnp = cm_GetRxConn(connp);
4555 code = RXAFS_SetLock(rxconnp, &tfid, lockType,
4557 rx_PutConnection(rxconnp);
4559 } while (cm_Analyze(connp, userp, reqp, &cfid, &volSync,
4562 code = cm_MapRPCError(code, reqp);
4564 osi_Log1(afsd_logp, "CALL SetLock FAILURE, code 0x%x", code);
4566 osi_Log0(afsd_logp, "CALL SetLock SUCCESS");
4569 reqp->flags = reqflags;
4571 lock_ObtainWrite(&scp->rw);
4574 * The file server does not return a status structure so we must
4575 * locally track the file server lock count to the best of our
4578 if (lockType == LockWrite)
4579 scp->fsLockCount = -1;
4586 /* called with scp->rw held. Releases it during processing */
4587 long cm_IntReleaseLock(cm_scache_t * scp, cm_user_t * userp,
4593 struct rx_connection * rxconnp;
4596 if (scp->flags & CM_SCACHEFLAG_DELETED) {
4597 osi_Log1(afsd_logp, "CALL ReleaseLock on Deleted Vnode scp 0x%p", scp);
4601 memset(&volSync, 0, sizeof(volSync));
4603 tfid.Volume = scp->fid.volume;
4604 tfid.Vnode = scp->fid.vnode;
4605 tfid.Unique = scp->fid.unique;
4608 lock_ReleaseWrite(&scp->rw);
4610 osi_Log1(afsd_logp, "CALL ReleaseLock scp 0x%p", scp);
4613 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4617 rxconnp = cm_GetRxConn(connp);
4618 code = RXAFS_ReleaseLock(rxconnp, &tfid, &volSync);
4619 rx_PutConnection(rxconnp);
4621 } while (cm_Analyze(connp, userp, reqp, &cfid, &volSync,
4623 code = cm_MapRPCError(code, reqp);
4626 "CALL ReleaseLock FAILURE, code 0x%x", code);
4629 "CALL ReleaseLock SUCCESS");
4631 lock_ObtainWrite(&scp->rw);
4634 * The file server does not return a status structure so we must
4635 * locally track the file server lock count to the best of our
4639 if (scp->fsLockCount < 0)
4640 scp->fsLockCount = 0;
4643 return (code != CM_ERROR_BADFD ? code : 0);
4646 /* called with scp->rw held. May release it during processing, but
4647 will exit with lock held.
4651 - 0 if the user has permission to get the specified lock for the scp
4653 - CM_ERROR_NOACCESS if not
4655 Any other error from cm_SyncOp will be sent down untranslated.
4657 If CM_ERROR_NOACCESS is returned and lock_type is LockRead, then
4658 phas_insert (if non-NULL) will receive a boolean value indicating
4659 whether the user has INSERT permission or not.
4661 long cm_LockCheckPerms(cm_scache_t * scp,
4668 long code = 0, code2 = 0;
4670 /* lock permissions are slightly tricky because of the 'i' bit.
4671 If the user has PRSFS_LOCK, she can read-lock the file. If the
4672 user has PRSFS_WRITE, she can write-lock the file. However, if
4673 the user has PRSFS_INSERT, then she can write-lock new files,
4674 but not old ones. Since we don't have information about
4675 whether a file is new or not, we assume that if the user owns
4676 the scp, then she has the permissions that are granted by
4679 osi_Log3(afsd_logp, "cm_LockCheckPerms for scp[0x%p] type[%d] user[0x%p]",
4680 scp, lock_type, userp);
4682 if (lock_type == LockRead)
4683 rights |= PRSFS_LOCK;
4684 else if (lock_type == LockWrite)
4685 rights |= PRSFS_WRITE | PRSFS_LOCK;
4688 osi_assertx(FALSE, "invalid lock type");
4693 *phas_insert = FALSE;
4695 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
4696 CM_SCACHESYNC_GETSTATUS |
4697 CM_SCACHESYNC_NEEDCALLBACK);
4699 if (phas_insert && scp->creator == userp) {
4701 /* If this file was created by the user, then we check for
4702 PRSFS_INSERT. If the file server is recent enough, then
4703 this should be sufficient for her to get a write-lock (but
4704 not necessarily a read-lock). VICED_CAPABILITY_WRITELOCKACL
4705 indicates whether a file server supports getting write
4706 locks when the user only has PRSFS_INSERT.
4708 If the file was not created by the user we skip the check
4709 because the INSERT bit will not apply to this user even
4713 code2 = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
4714 CM_SCACHESYNC_GETSTATUS |
4715 CM_SCACHESYNC_NEEDCALLBACK);
4717 if (code2 == CM_ERROR_NOACCESS) {
4718 osi_Log0(afsd_logp, "cm_LockCheckPerms user has no INSERT bits");
4720 *phas_insert = TRUE;
4721 osi_Log0(afsd_logp, "cm_LockCheckPerms user has INSERT bits");
4725 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
4727 osi_Log1(afsd_logp, "cm_LockCheckPerms returning code %d", code);
4732 /* called with scp->rw held */
4733 long cm_Lock(cm_scache_t *scp, unsigned char sLockType,
4734 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
4736 int allowWait, cm_user_t *userp, cm_req_t *reqp,
4737 cm_file_lock_t **lockpp)
4740 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
4741 cm_file_lock_t *fileLock;
4744 int wait_unlock = FALSE;
4745 int force_client_lock = FALSE;
4747 osi_Log4(afsd_logp, "cm_Lock scp 0x%x type 0x%x offset %d length %d",
4748 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
4749 osi_Log4(afsd_logp, "... allowWait %d key <0x%x, 0x%x, 0x%x>", allowWait,
4750 key.process_id, key.session_id, key.file_id);
4753 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4755 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4758 3.1 If L->LockType is exclusive then there does NOT exist a
4759 ACCEPTED lock M in S->fileLocks such that _a_ in
4760 (M->LOffset,+M->LLength).
4762 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4763 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4764 M->LockType is shared.
4766 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4768 4.1 M->key != Key(C)
4770 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4771 and (M->LOffset,+M->LLength) do not intersect.
4774 range.offset = LOffset.QuadPart;
4775 range.length = LLength.QuadPart;
4777 lock_ObtainRead(&cm_scacheLock);
4779 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
4781 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4783 if (IS_LOCK_LOST(fileLock)) {
4784 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4785 code = CM_ERROR_BADFD;
4787 } else if (fileLock->lockType == LockWrite && INTERSECT_RANGE(range, fileLock->range)) {
4788 code = CM_ERROR_WOULDBLOCK;
4794 /* we don't need to check for deleted locks here since deleted
4795 locks are dequeued from scp->fileLocks */
4796 if (IS_LOCK_ACCEPTED(fileLock) &&
4797 INTERSECT_RANGE(range, fileLock->range)) {
4799 if ((sLockType & LOCKING_ANDX_SHARED_LOCK) == 0 ||
4800 fileLock->lockType != LockRead) {
4802 code = CM_ERROR_WOULDBLOCK;
4808 lock_ReleaseRead(&cm_scacheLock);
4810 if (code == 0 && SERVERLOCKS_ENABLED(scp)) {
4811 if (Which == scp->serverLock ||
4812 (Which == LockRead && scp->serverLock == LockWrite)) {
4816 /* we already have the lock we need */
4817 osi_Log3(afsd_logp, " we already have the correct lock. exclusives[%d], shared[%d], serverLock[%d]",
4818 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
4820 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4822 /* special case: if we don't have permission to read-lock
4823 the file, then we force a clientside lock. This is to
4824 compensate for applications that obtain a read-lock for
4825 reading files off of directories that don't grant
4826 read-locks to the user. */
4827 if (code == CM_ERROR_NOACCESS && Which == LockRead) {
4829 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4830 osi_Log0(afsd_logp, " User has no read-lock perms, but has INSERT perms.");
4833 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4834 force_client_lock = TRUE;
4838 } else if ((scp->exclusiveLocks > 0) ||
4839 (scp->sharedLocks > 0 && scp->serverLock != LockRead)) {
4842 /* We are already waiting for some other lock. We should
4843 wait for the daemon to catch up instead of generating a
4844 flood of SetLock calls. */
4845 osi_Log3(afsd_logp, " already waiting for other lock. exclusives[%d], shared[%d], serverLock[%d]",
4846 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
4848 /* see if we have permission to create the lock in the
4850 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4852 code = CM_ERROR_WOULDBLOCK;
4853 else if (code == CM_ERROR_NOACCESS && Which == LockRead) {
4855 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4857 " User has no read-lock perms, but has INSERT perms.");
4858 code = CM_ERROR_WOULDBLOCK;
4861 " User has no read-lock perms. Forcing client-side lock");
4862 force_client_lock = TRUE;
4866 /* leave any other codes as-is */
4870 int check_data_version = FALSE;
4873 /* first check if we have permission to elevate or obtain
4875 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4877 if (code == CM_ERROR_NOACCESS && Which == LockRead &&
4878 (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp))) {
4879 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4880 force_client_lock = TRUE;
4885 /* has_insert => (Which == LockRead, code == CM_ERROR_NOACCESS) */
4887 if (scp->serverLock == LockRead && Which == LockWrite) {
4889 /* We want to escalate the lock to a LockWrite.
4890 * Unfortunately that's not really possible without
4891 * letting go of the current lock. But for now we do
4895 " attempting to UPGRADE from LockRead to LockWrite.");
4897 " dataVersion on scp: %I64d", scp->dataVersion);
4899 /* we assume at this point (because scp->serverLock
4900 was valid) that we had a valid server lock. */
4901 scp->lockDataVersion = scp->dataVersion;
4902 check_data_version = TRUE;
4904 code = cm_IntReleaseLock(scp, userp, reqp);
4907 /* We couldn't release the lock */
4910 scp->serverLock = -1;
4914 /* We need to obtain a server lock of type Which in order
4915 * to assert this file lock */
4916 #ifndef AGGRESSIVE_LOCKS
4919 newLock = LockWrite;
4922 code = cm_IntSetLock(scp, userp, newLock, reqp);
4924 #ifdef AGGRESSIVE_LOCKS
4925 if ((code == CM_ERROR_WOULDBLOCK ||
4926 code == CM_ERROR_NOACCESS) && newLock != Which) {
4927 /* we wanted LockRead. We tried LockWrite. Now try
4932 osi_assertx(newLock == LockRead, "lock type not read");
4934 code = cm_IntSetLock(scp, userp, newLock, reqp);
4938 if (code == CM_ERROR_NOACCESS) {
4939 if (Which == LockRead) {
4940 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4942 /* We requested a read-lock, but we have permission to
4943 * get a write-lock. Try that */
4945 tcode = cm_LockCheckPerms(scp, LockWrite, userp, reqp, NULL);
4948 newLock = LockWrite;
4950 osi_Log0(afsd_logp, " User has 'i' perms and the request was for a LockRead. Trying to get a LockWrite instead");
4952 code = cm_IntSetLock(scp, userp, newLock, reqp);
4955 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4956 force_client_lock = TRUE;
4958 } else if (Which == LockWrite &&
4959 scp->creator == userp && !SCP_SUPPORTS_WRITELOCKACL(scp)) {
4962 /* Special case: if the lock request was for a
4963 * LockWrite and the user owns the file and we weren't
4964 * allowed to obtain the serverlock, we either lost a
4965 * race (the permissions changed from under us), or we
4966 * have 'i' bits, but we aren't allowed to lock the
4969 /* check if we lost a race... */
4970 tcode = cm_LockCheckPerms(scp, Which, userp, reqp, NULL);
4973 osi_Log0(afsd_logp, " User has 'i' perms but can't obtain write locks. Using client-side locks.");
4974 force_client_lock = TRUE;
4979 if (code == 0 && check_data_version &&
4980 scp->dataVersion != scp->lockDataVersion) {
4981 /* We lost a race. Although we successfully obtained
4982 * a lock, someone modified the file in between. The
4983 * locks have all been technically lost. */
4986 " Data version mismatch while upgrading lock.");
4988 " Data versions before=%I64d, after=%I64d",
4989 scp->lockDataVersion,
4992 " Releasing stale lock for scp 0x%x", scp);
4994 code = cm_IntReleaseLock(scp, userp, reqp);
4996 scp->serverLock = -1;
4998 code = CM_ERROR_INVAL;
4999 } else if (code == 0) {
5000 scp->serverLock = newLock;
5001 scp->lockDataVersion = scp->dataVersion;
5005 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5006 scp->serverLock == -1) {
5007 /* Oops. We lost the lock. */
5008 cm_LockMarkSCacheLost(scp);
5011 } else if (code == 0) { /* server locks not enabled */
5013 " Skipping server lock for scp");
5018 if (code != 0 && !force_client_lock) {
5019 /* Special case error translations
5021 Applications don't expect certain errors from a
5022 LockFile/UnlockFile call. We need to translate some error
5023 code to codes that apps expect and handle. */
5025 /* We shouldn't actually need to handle this case since we
5026 simulate locks for RO scps anyway. */
5027 if (code == CM_ERROR_READONLY) {
5028 osi_Log0(afsd_logp, " Reinterpreting CM_ERROR_READONLY as CM_ERROR_NOACCESS");
5029 code = CM_ERROR_NOACCESS;
5033 if (code == 0 || (code == CM_ERROR_WOULDBLOCK && allowWait) ||
5034 force_client_lock) {
5036 /* clear the error if we are forcing a client lock, so we
5037 don't get confused later. */
5038 if (force_client_lock && code != CM_ERROR_WOULDBLOCK)
5043 lock_ObtainWrite(&cm_scacheLock);
5044 fileLock = cm_GetFileLock();
5046 fileLock->fid = scp->fid;
5048 fileLock->key = key;
5049 fileLock->lockType = Which;
5050 fileLock->userp = userp;
5051 fileLock->range = range;
5052 fileLock->flags = (code == 0 ? 0 :
5054 CM_FILELOCK_FLAG_WAITUNLOCK :
5055 CM_FILELOCK_FLAG_WAITLOCK));
5057 if (force_client_lock || !SERVERLOCKS_ENABLED(scp))
5058 fileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
5060 fileLock->lastUpdate = (code == 0 && !force_client_lock) ? time(NULL) : 0;
5062 osi_QAddT(&scp->fileLocksH, &scp->fileLocksT, &fileLock->fileq);
5063 cm_HoldSCacheNoLock(scp);
5064 fileLock->scp = scp;
5065 osi_QAdd(&cm_allFileLocks, &fileLock->q);
5066 lock_ReleaseWrite(&cm_scacheLock);
5072 if (IS_LOCK_CLIENTONLY(fileLock)) {
5074 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5075 if (Which == LockRead)
5078 scp->exclusiveLocks++;
5082 "cm_Lock Lock added 0x%p flags 0x%x to scp [0x%p]",
5083 fileLock, fileLock->flags, scp);
5085 " exclusives[%d] shared[%d] client[%d] serverLock[%d]",
5086 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5087 (int)(signed char) scp->serverLock);
5090 "cm_Lock Rejecting lock (code = 0x%x)", code);
5093 /* Convert from would block to lock not granted */
5094 if (code == CM_ERROR_WOULDBLOCK)
5095 code = CM_ERROR_LOCK_NOT_GRANTED;
5101 cm_IntUnlock(cm_scache_t * scp,
5107 osi_assertx(scp->sharedLocks >= 0, "scp->sharedLocks < 0");
5108 osi_assertx(scp->exclusiveLocks >= 0, "scp->exclusiveLocks < 0");
5109 osi_assertx(scp->clientLocks >= 0, "scp->clientLocks < 0");
5111 if (!SERVERLOCKS_ENABLED(scp)) {
5112 osi_Log0(afsd_logp, " Skipping server lock for scp");
5116 /* Ideally we would go through the rest of the locks to determine
5117 * if one or more locks that were formerly in WAITUNLOCK can now
5118 * be put to ACTIVE or WAITLOCK and update scp->exclusiveLocks and
5119 * scp->sharedLocks accordingly. However, the retrying of locks
5120 * in that manner is done cm_RetryLock() manually.
5123 if (scp->serverLock == LockWrite &&
5124 scp->exclusiveLocks == 0 &&
5125 scp->sharedLocks > 0) {
5126 /* The serverLock should be downgraded to LockRead */
5127 osi_Log0(afsd_logp, " DOWNGRADE lock from LockWrite to LockRead");
5129 /* Make sure there are no dirty buffers left. */
5130 code = cm_FSync(scp, userp, reqp, TRUE);
5132 /* since scp->serverLock looked sane, we are going to assume
5133 that we have a valid server lock. */
5134 scp->lockDataVersion = scp->dataVersion;
5135 osi_Log1(afsd_logp, " dataVersion on scp = %I64d", scp->dataVersion);
5137 /* before we downgrade, make sure that we have enough
5138 permissions to get the read lock. */
5139 code = cm_LockCheckPerms(scp, LockRead, userp, reqp, NULL);
5142 osi_Log0(afsd_logp, " SKIPPING downgrade because user doesn't have perms to get downgraded lock");
5148 code = cm_IntReleaseLock(scp, userp, reqp);
5151 /* so we couldn't release it. Just let the lock be for now */
5155 scp->serverLock = -1;
5158 code = cm_IntSetLock(scp, userp, LockRead, reqp);
5160 if (code == 0 && scp->lockDataVersion == scp->dataVersion) {
5161 scp->serverLock = LockRead;
5162 } else if (code == 0 && scp->lockDataVersion != scp->dataVersion) {
5163 /* We lost a race condition. Although we have a valid
5164 lock on the file, the data has changed and essentially
5165 we have lost the lock we had during the transition. */
5167 osi_Log0(afsd_logp, "Data version mismatch during lock downgrade");
5168 osi_Log2(afsd_logp, " Data versions before=%I64d, after=%I64d",
5169 scp->lockDataVersion,
5172 code = cm_IntReleaseLock(scp, userp, reqp);
5174 code = CM_ERROR_INVAL;
5175 scp->serverLock = -1;
5179 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5180 (scp->serverLock == -1)) {
5182 cm_LockMarkSCacheLost(scp);
5185 /* failure here has no bearing on the return value of cm_Unlock() */
5188 } else if (scp->serverLock != (-1) &&
5189 scp->exclusiveLocks == 0 &&
5190 scp->sharedLocks == 0) {
5191 /* The serverLock should be released entirely */
5193 if (scp->serverLock == LockWrite) {
5194 osi_Log0(afsd_logp, " RELEASE LockWrite -> LockNone");
5196 /* Make sure there are no dirty buffers left. */
5197 code = cm_FSync(scp, userp, reqp, TRUE);
5199 osi_Log0(afsd_logp, " RELEASE LockRead -> LockNone");
5202 code = cm_IntReleaseLock(scp, userp, reqp);
5205 scp->serverLock = (-1);
5211 /* Called with scp->rw held */
5212 long cm_UnlockByKey(cm_scache_t * scp,
5219 cm_file_lock_t *fileLock;
5220 osi_queue_t *q, *qn;
5223 osi_Log4(afsd_logp, "cm_UnlockByKey scp 0x%p key <0x%x,0x%x,0x%x",
5224 scp, key.process_id, key.session_id, key.file_id);
5225 osi_Log1(afsd_logp, " flags=0x%x", flags);
5227 lock_ObtainWrite(&cm_scacheLock);
5229 for (q = scp->fileLocksH; q; q = qn) {
5232 fileLock = (cm_file_lock_t *)
5233 ((char *) q - offsetof(cm_file_lock_t, fileq));
5236 osi_Log4(afsd_logp, " Checking lock[0x%x] range[%d,+%d] type[%d]",
5238 (unsigned long) fileLock->range.offset,
5239 (unsigned long) fileLock->range.length,
5240 fileLock->lockType);
5241 osi_Log4(afsd_logp, " key<0x%x, 0x%x, 0x%x> flags[0x%x]",
5242 fileLock->key.process_id, fileLock->key.session_id, fileLock->key.file_id,
5245 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5246 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5247 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5249 fileLock->fid.volume,
5250 fileLock->fid.vnode,
5251 fileLock->fid.unique);
5252 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5253 fileLock->scp->fid.cell,
5254 fileLock->scp->fid.volume,
5255 fileLock->scp->fid.vnode,
5256 fileLock->scp->fid.unique);
5257 osi_assertx(FALSE, "invalid fid value");
5261 if (!IS_LOCK_DELETED(fileLock) &&
5262 cm_KeyEquals(&fileLock->key, &key, flags)) {
5263 osi_Log3(afsd_logp, "...Unlock range [%d,+%d] type %d",
5264 fileLock->range.offset,
5265 fileLock->range.length,
5266 fileLock->lockType);
5268 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5270 if (IS_LOCK_CLIENTONLY(fileLock)) {
5272 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5273 if (fileLock->lockType == LockRead)
5276 scp->exclusiveLocks--;
5279 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5281 cm_ReleaseUser(fileLock->userp);
5282 cm_ReleaseSCacheNoLock(scp);
5284 fileLock->userp = NULL;
5285 fileLock->scp = NULL;
5291 lock_ReleaseWrite(&cm_scacheLock);
5293 if (n_unlocks == 0) {
5294 osi_Log0(afsd_logp, "cm_UnlockByKey no locks found");
5295 osi_Log3(afsd_logp, " Leaving scp with exclusives[%d], shared[%d], serverLock[%d]",
5296 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5301 code = cm_IntUnlock(scp, userp, reqp);
5302 osi_Log1(afsd_logp, "cm_UnlockByKey code 0x%x", code);
5304 osi_Log4(afsd_logp, " Leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5305 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5306 (int)(signed char) scp->serverLock);
5311 /* Called with scp->rw held */
5312 long cm_Unlock(cm_scache_t *scp,
5313 unsigned char sLockType,
5314 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
5321 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
5322 cm_file_lock_t *fileLock;
5324 int release_userp = FALSE;
5325 int exact_match = !(flags & CM_UNLOCK_FLAG_MATCH_RANGE);
5327 LARGE_INTEGER RangeEnd;
5329 osi_Log4(afsd_logp, "cm_Unlock scp 0x%p type 0x%x offset 0x%x length 0x%x",
5330 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
5331 osi_Log4(afsd_logp, "... key <0x%x,0x%x,0x%x> flags 0x%x",
5332 key.process_id, key.session_id, key.file_id, flags);
5335 RangeEnd.QuadPart = LOffset.QuadPart + LLength.QuadPart;
5338 lock_ObtainRead(&cm_scacheLock);
5340 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5341 fileLock = (cm_file_lock_t *)
5342 ((char *) q - offsetof(cm_file_lock_t, fileq));
5345 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5346 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5347 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5349 fileLock->fid.volume,
5350 fileLock->fid.vnode,
5351 fileLock->fid.unique);
5352 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5353 fileLock->scp->fid.cell,
5354 fileLock->scp->fid.volume,
5355 fileLock->scp->fid.vnode,
5356 fileLock->scp->fid.unique);
5357 osi_assertx(FALSE, "invalid fid value");
5361 if (!IS_LOCK_DELETED(fileLock) &&
5362 cm_KeyEquals(&fileLock->key, &key, 0) &&
5363 fileLock->range.offset == LOffset.QuadPart &&
5364 fileLock->range.length == LLength.QuadPart) {
5370 if (!IS_LOCK_DELETED(fileLock) &&
5371 cm_KeyEquals(&fileLock->key, &key, 0) &&
5372 fileLock->range.offset >= LOffset.QuadPart &&
5373 fileLock->range.offset < RangeEnd.QuadPart &&
5374 (fileLock->range.offset + fileLock->range.length) <= RangeEnd.QuadPart) {
5382 lock_ReleaseRead(&cm_scacheLock);
5384 if (lock_found && !exact_match) {
5388 osi_Log0(afsd_logp, "cm_Unlock lock not found; failure");
5390 /* The lock didn't exist anyway. *shrug* */
5391 return CM_ERROR_RANGE_NOT_LOCKED;
5395 /* discard lock record */
5396 lock_ConvertRToW(&cm_scacheLock);
5397 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5400 * Don't delete it here; let the daemon delete it, to simplify
5401 * the daemon's traversal of the list.
5404 if (IS_LOCK_CLIENTONLY(fileLock)) {
5406 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5407 if (fileLock->lockType == LockRead)
5410 scp->exclusiveLocks--;
5413 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5415 if (userp != NULL) {
5416 cm_ReleaseUser(fileLock->userp);
5418 userp = fileLock->userp;
5419 release_userp = TRUE;
5421 cm_ReleaseSCacheNoLock(scp);
5422 fileLock->userp = NULL;
5423 fileLock->scp = NULL;
5424 lock_ReleaseWrite(&cm_scacheLock);
5426 code = cm_IntUnlock(scp, userp, reqp);
5428 if (release_userp) {
5429 cm_ReleaseUser(userp);
5430 release_userp = FALSE;
5434 osi_Log1(afsd_logp, "cm_Unlock not exact match, searching for next lock, code 0x%x", code);
5435 goto try_again; /* might be more than one lock in the range */
5440 osi_Log1(afsd_logp, "cm_Unlock code 0x%x", code);
5441 osi_Log4(afsd_logp, " leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5442 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5443 (int)(signed char) scp->serverLock);
5448 /* called with scp->rw held */
5449 void cm_LockMarkSCacheLost(cm_scache_t * scp)
5451 cm_file_lock_t *fileLock;
5454 osi_Log1(afsd_logp, "cm_LockMarkSCacheLost scp 0x%x", scp);
5456 /* cm_scacheLock needed because we are modifying fileLock->flags */
5457 lock_ObtainWrite(&cm_scacheLock);
5459 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5461 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
5463 if (IS_LOCK_ACTIVE(fileLock) &&
5464 !IS_LOCK_CLIENTONLY(fileLock)) {
5465 if (fileLock->lockType == LockRead)
5468 scp->exclusiveLocks--;
5470 fileLock->flags |= CM_FILELOCK_FLAG_LOST;
5474 scp->serverLock = -1;
5475 scp->lockDataVersion = CM_SCACHE_VERSION_BAD;
5476 lock_ReleaseWrite(&cm_scacheLock);
5479 /* Called with no relevant locks held */
5480 void cm_CheckLocks()
5482 osi_queue_t *q, *nq;
5483 cm_file_lock_t *fileLock;
5489 struct rx_connection * rxconnp;
5492 memset(&volSync, 0, sizeof(volSync));
5496 lock_ObtainWrite(&cm_scacheLock);
5498 cm_lockRefreshCycle++;
5500 osi_Log1(afsd_logp, "cm_CheckLocks starting lock check cycle %d", cm_lockRefreshCycle);
5502 for (q = cm_allFileLocks; q; q = nq) {
5503 fileLock = (cm_file_lock_t *) q;
5507 if (IS_LOCK_DELETED(fileLock)) {
5508 cm_user_t *userp = fileLock->userp;
5509 cm_scache_t *scp = fileLock->scp;
5510 fileLock->userp = NULL;
5511 fileLock->scp = NULL;
5514 lock_ReleaseWrite(&cm_scacheLock);
5515 lock_ObtainWrite(&scp->rw);
5516 code = cm_IntUnlock(scp, userp, &req);
5517 lock_ReleaseWrite(&scp->rw);
5519 cm_ReleaseUser(userp);
5520 lock_ObtainWrite(&cm_scacheLock);
5521 cm_ReleaseSCacheNoLock(scp);
5523 osi_QRemove(&cm_allFileLocks, q);
5524 cm_PutFileLock(fileLock);
5526 } else if (IS_LOCK_ACTIVE(fileLock) && !IS_LOCK_CLIENTONLY(fileLock)) {
5528 /* Server locks must have been enabled for us to have
5529 received an active non-client-only lock. */
5530 osi_assertx(cm_enableServerLocks, "!cm_enableServerLocks");
5532 scp = fileLock->scp;
5533 osi_assertx(scp != NULL, "null cm_scache_t");
5535 cm_HoldSCacheNoLock(scp);
5538 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5539 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5540 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5542 fileLock->fid.volume,
5543 fileLock->fid.vnode,
5544 fileLock->fid.unique);
5545 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5546 fileLock->scp->fid.cell,
5547 fileLock->scp->fid.volume,
5548 fileLock->scp->fid.vnode,
5549 fileLock->scp->fid.unique);
5550 osi_assertx(FALSE, "invalid fid");
5553 /* Server locks are extended once per scp per refresh
5555 if (scp->lastRefreshCycle != cm_lockRefreshCycle) {
5557 int scp_done = FALSE;
5559 osi_Log1(afsd_logp, "cm_CheckLocks Updating scp 0x%x", scp);
5561 lock_ReleaseWrite(&cm_scacheLock);
5562 lock_ObtainWrite(&scp->rw);
5564 /* did the lock change while we weren't holding the lock? */
5565 if (!IS_LOCK_ACTIVE(fileLock))
5566 goto post_syncopdone;
5568 code = cm_SyncOp(scp, NULL, fileLock->userp, &req, 0,
5569 CM_SCACHESYNC_NEEDCALLBACK
5570 | CM_SCACHESYNC_GETSTATUS
5571 | CM_SCACHESYNC_LOCK);
5575 "cm_CheckLocks SyncOp failure code 0x%x", code);
5576 goto post_syncopdone;
5579 /* cm_SyncOp releases scp->rw during which the lock
5580 may get released. */
5581 if (!IS_LOCK_ACTIVE(fileLock))
5582 goto pre_syncopdone;
5584 if (scp->serverLock != -1 && !(scp->flags & CM_SCACHEFLAG_DELETED)) {
5588 tfid.Volume = scp->fid.volume;
5589 tfid.Vnode = scp->fid.vnode;
5590 tfid.Unique = scp->fid.unique;
5592 userp = fileLock->userp;
5594 osi_Log3(afsd_logp, "CALL ExtendLock lock 0x%p for scp=0x%p with lock %d",
5597 (int) scp->serverLock);
5599 lock_ReleaseWrite(&scp->rw);
5602 code = cm_ConnFromFID(&cfid, userp,
5607 rxconnp = cm_GetRxConn(connp);
5608 code = RXAFS_ExtendLock(rxconnp, &tfid,
5610 rx_PutConnection(rxconnp);
5612 osi_Log1(afsd_logp, " ExtendLock returns %d", code);
5614 } while (cm_Analyze(connp, userp, &req,
5615 &cfid, &volSync, NULL, NULL,
5618 code = cm_MapRPCError(code, &req);
5620 lock_ObtainWrite(&scp->rw);
5623 osi_Log1(afsd_logp, "CALL ExtendLock FAILURE, code 0x%x", code);
5624 scp->fsLockCount = 0;
5626 osi_Log0(afsd_logp, "CALL ExtendLock SUCCESS");
5627 scp->lockDataVersion = scp->dataVersion;
5630 if ((code == EINVAL || code == CM_ERROR_INVAL) &&
5631 scp->lockDataVersion == scp->dataVersion) {
5635 (scp->exclusiveLocks > 0) ? LockWrite: LockRead;
5637 /* we might still have a chance to obtain a
5640 code = cm_IntSetLock(scp, userp, lockType, &req);
5643 code = CM_ERROR_INVAL;
5644 } else if (scp->lockDataVersion != scp->dataVersion) {
5646 /* now check if we still have the file at
5647 the right data version. */
5649 "Data version mismatch on scp 0x%p",
5652 " Data versions: before=%I64d, after=%I64d",
5653 scp->lockDataVersion,
5656 code = cm_IntReleaseLock(scp, userp, &req);
5658 code = CM_ERROR_INVAL;
5662 if (code == EINVAL || code == CM_ERROR_INVAL ||
5663 code == CM_ERROR_BADFD) {
5664 cm_LockMarkSCacheLost(scp);
5668 /* interestingly, we have found an active lock
5669 belonging to an scache that has no
5671 cm_LockMarkSCacheLost(scp);
5678 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
5681 lock_ReleaseWrite(&scp->rw);
5683 lock_ObtainWrite(&cm_scacheLock);
5686 fileLock->lastUpdate = time(NULL);
5690 scp->lastRefreshCycle = cm_lockRefreshCycle;
5693 /* we have already refreshed the locks on this scp */
5694 fileLock->lastUpdate = time(NULL);
5697 cm_ReleaseSCacheNoLock(scp);
5699 } else if (IS_LOCK_ACTIVE(fileLock) && IS_LOCK_CLIENTONLY(fileLock)) {
5700 /* TODO: Check callbacks */
5704 lock_ReleaseWrite(&cm_scacheLock);
5705 osi_Log1(afsd_logp, "cm_CheckLocks completes lock check cycle %d", cm_lockRefreshCycle);
5708 /* NOT called with scp->rw held. */
5709 long cm_RetryLock(cm_file_lock_t *oldFileLock, int client_is_dead)
5712 cm_scache_t *scp = NULL;
5713 cm_file_lock_t *fileLock;
5717 int force_client_lock = FALSE;
5718 int has_insert = FALSE;
5719 int check_data_version = FALSE;
5723 if (client_is_dead) {
5724 code = CM_ERROR_TIMEDOUT;
5728 lock_ObtainRead(&cm_scacheLock);
5730 osi_Log2(afsd_logp, "cm_RetryLock checking lock %p (scp=%p)", oldFileLock, oldFileLock->scp);
5731 osi_Log4(afsd_logp, " offset(%x:%x) length(%x:%x)",
5732 (unsigned)(oldFileLock->range.offset >> 32),
5733 (unsigned)(oldFileLock->range.offset & 0xffffffff),
5734 (unsigned)(oldFileLock->range.length >> 32),
5735 (unsigned)(oldFileLock->range.length & 0xffffffff));
5736 osi_Log4(afsd_logp, " key<0x%x,0x%x,0x%x> flags=%x",
5737 oldFileLock->key.process_id, oldFileLock->key.session_id, oldFileLock->key.file_id,
5738 (unsigned)(oldFileLock->flags));
5740 /* if the lock has already been granted, then we have nothing to do */
5741 if (IS_LOCK_ACTIVE(oldFileLock)) {
5742 lock_ReleaseRead(&cm_scacheLock);
5743 osi_Log0(afsd_logp, "cm_RetryLock lock already granted");
5747 /* we can't do anything with lost or deleted locks at the moment. */
5748 if (IS_LOCK_LOST(oldFileLock) || IS_LOCK_DELETED(oldFileLock)) {
5749 code = CM_ERROR_BADFD;
5750 osi_Log0(afsd_logp, "cm_RetryLock lock is lost or deleted");
5751 lock_ReleaseRead(&cm_scacheLock);
5755 scp = oldFileLock->scp;
5757 osi_assertx(scp != NULL, "null cm_scache_t");
5759 lock_ReleaseRead(&cm_scacheLock);
5760 lock_ObtainWrite(&scp->rw);
5762 code = cm_LockCheckPerms(scp, oldFileLock->lockType,
5766 if (code == CM_ERROR_NOACCESS && oldFileLock->lockType == LockRead) {
5767 if (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp)) {
5768 force_client_lock = TRUE;
5772 lock_ReleaseWrite(&scp->rw);
5776 lock_ObtainWrite(&cm_scacheLock);
5778 /* Check if we already have a sufficient server lock to allow this
5779 lock to go through. */
5780 if (IS_LOCK_WAITLOCK(oldFileLock) &&
5781 (!SERVERLOCKS_ENABLED(scp) ||
5782 scp->serverLock == oldFileLock->lockType ||
5783 scp->serverLock == LockWrite)) {
5785 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5787 if (SERVERLOCKS_ENABLED(scp)) {
5788 osi_Log1(afsd_logp, "cm_RetryLock Server lock (%d) is sufficient for lock. Granting",
5789 (int) scp->serverLock);
5791 osi_Log0(afsd_logp, "cm_RetryLock skipping server lock for scp");
5794 lock_ReleaseWrite(&cm_scacheLock);
5795 lock_ReleaseWrite(&scp->rw);
5800 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
5802 /* check if the conflicting locks have dissappeared already */
5803 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5805 fileLock = (cm_file_lock_t *)
5806 ((char *) q - offsetof(cm_file_lock_t, fileq));
5808 if (IS_LOCK_LOST(fileLock)) {
5809 if (cm_KeyEquals(&fileLock->key, &oldFileLock->key, 0)) {
5810 code = CM_ERROR_BADFD;
5811 oldFileLock->flags |= CM_FILELOCK_FLAG_LOST;
5812 osi_Log1(afsd_logp, " found lost lock %p for same key. Marking lock as lost",
5815 } else if (fileLock->lockType == LockWrite &&
5816 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
5817 osi_Log1(afsd_logp, " found conflicting LOST lock %p", fileLock);
5818 code = CM_ERROR_WOULDBLOCK;
5823 if (IS_LOCK_ACCEPTED(fileLock) &&
5824 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
5826 if (oldFileLock->lockType != LockRead ||
5827 fileLock->lockType != LockRead) {
5829 osi_Log1(afsd_logp, " found conflicting lock %p", fileLock);
5830 code = CM_ERROR_WOULDBLOCK;
5838 lock_ReleaseWrite(&cm_scacheLock);
5839 lock_ReleaseWrite(&scp->rw);
5844 /* when we get here, the lock is either a WAITUNLOCK or WAITLOCK.
5845 If it is WAITUNLOCK, then we didn't find any conflicting lock
5846 but we haven't verfied whether the serverLock is sufficient to
5847 assert it. If it is WAITLOCK, then the serverLock is
5848 insufficient to assert it. Eitherway, we are ready to accept
5849 the lock as either ACTIVE or WAITLOCK depending on the
5852 /* First, promote the WAITUNLOCK to a WAITLOCK */
5853 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
5854 if (oldFileLock->lockType == LockRead)
5857 scp->exclusiveLocks++;
5859 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITUNLOCK;
5860 oldFileLock->flags |= CM_FILELOCK_FLAG_WAITLOCK;
5863 osi_assertx(IS_LOCK_WAITLOCK(oldFileLock), "!IS_LOCK_WAITLOCK");
5865 if (force_client_lock ||
5866 !SERVERLOCKS_ENABLED(scp) ||
5867 scp->serverLock == oldFileLock->lockType ||
5868 (oldFileLock->lockType == LockRead &&
5869 scp->serverLock == LockWrite)) {
5871 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5873 if ((force_client_lock ||
5874 !SERVERLOCKS_ENABLED(scp)) &&
5875 !IS_LOCK_CLIENTONLY(oldFileLock)) {
5877 oldFileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
5879 if (oldFileLock->lockType == LockRead)
5882 scp->exclusiveLocks--;
5887 lock_ReleaseWrite(&cm_scacheLock);
5888 lock_ReleaseWrite(&scp->rw);
5895 code = cm_SyncOp(scp, NULL, oldFileLock->userp, &req, 0,
5896 CM_SCACHESYNC_NEEDCALLBACK
5897 | CM_SCACHESYNC_GETSTATUS
5898 | CM_SCACHESYNC_LOCK);
5900 osi_Log1(afsd_logp, "cm_RetryLock SyncOp failure code 0x%x", code);
5901 lock_ReleaseWrite(&cm_scacheLock);
5902 goto post_syncopdone;
5905 if (!IS_LOCK_WAITLOCK(oldFileLock))
5906 goto pre_syncopdone;
5908 userp = oldFileLock->userp;
5910 #ifndef AGGRESSIVE_LOCKS
5911 newLock = oldFileLock->lockType;
5913 newLock = LockWrite;
5917 /* if has_insert is non-zero, then:
5918 - the lock a LockRead
5919 - we don't have permission to get a LockRead
5920 - we do have permission to get a LockWrite
5921 - the server supports VICED_CAPABILITY_WRITELOCKACL
5924 newLock = LockWrite;
5927 lock_ReleaseWrite(&cm_scacheLock);
5929 /* when we get here, either we have a read-lock and want a
5930 write-lock or we don't have any locks and we want some
5933 if (scp->serverLock == LockRead) {
5935 osi_assertx(newLock == LockWrite, "!LockWrite");
5937 osi_Log0(afsd_logp, " Attempting to UPGRADE from LockRead to LockWrite");
5939 scp->lockDataVersion = scp->dataVersion;
5940 check_data_version = TRUE;
5942 code = cm_IntReleaseLock(scp, userp, &req);
5945 goto pre_syncopdone;
5947 scp->serverLock = -1;
5950 code = cm_IntSetLock(scp, userp, newLock, &req);
5953 if (scp->dataVersion != scp->lockDataVersion) {
5954 /* we lost a race. too bad */
5957 " Data version mismatch while upgrading lock.");
5959 " Data versions before=%I64d, after=%I64d",
5960 scp->lockDataVersion,
5963 " Releasing stale lock for scp 0x%x", scp);
5965 code = cm_IntReleaseLock(scp, userp, &req);
5967 scp->serverLock = -1;
5969 code = CM_ERROR_INVAL;
5971 cm_LockMarkSCacheLost(scp);
5973 scp->serverLock = newLock;
5978 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
5984 if (code != 0 && code != CM_ERROR_WOULDBLOCK) {
5985 lock_ObtainWrite(&cm_scacheLock);
5986 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, &oldFileLock->fileq);
5987 lock_ReleaseWrite(&cm_scacheLock);
5989 lock_ReleaseWrite(&scp->rw);
5992 lock_ObtainWrite(&cm_scacheLock);
5994 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5995 } else if (code != CM_ERROR_WOULDBLOCK) {
5996 oldFileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5997 cm_ReleaseUser(oldFileLock->userp);
5998 oldFileLock->userp = NULL;
5999 if (oldFileLock->scp) {
6000 cm_ReleaseSCacheNoLock(oldFileLock->scp);
6001 oldFileLock->scp = NULL;
6004 lock_ReleaseWrite(&cm_scacheLock);
6009 cm_key_t cm_GenerateKey(afs_uint16 session_id, afs_offs_t process_id, afs_uint64 file_id)
6013 key.process_id = process_id;
6014 key.session_id = session_id;
6015 key.file_id = file_id;
6020 int cm_KeyEquals(cm_key_t *k1, cm_key_t *k2, int flags)
6022 return (k1->session_id == k2->session_id) && (k1->file_id == k2->file_id) &&
6023 ((flags & CM_UNLOCK_FLAG_BY_FID) || (k1->process_id == k2->process_id));
6026 void cm_ReleaseAllLocks(void)
6032 cm_file_lock_t *fileLock;
6035 for (i = 0; i < cm_data.scacheHashTableSize; i++)
6037 for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
6038 while (scp->fileLocksH != NULL) {
6039 lock_ObtainWrite(&scp->rw);
6040 lock_ObtainWrite(&cm_scacheLock);
6041 if (!scp->fileLocksH) {
6042 lock_ReleaseWrite(&cm_scacheLock);
6043 lock_ReleaseWrite(&scp->rw);
6046 fileLock = (cm_file_lock_t *)((char *) scp->fileLocksH - offsetof(cm_file_lock_t, fileq));
6047 userp = fileLock->userp;
6049 key = fileLock->key;
6050 cm_HoldSCacheNoLock(scp);
6051 lock_ReleaseWrite(&cm_scacheLock);
6052 cm_UnlockByKey(scp, key, 0, userp, &req);
6053 cm_ReleaseSCache(scp);
6054 cm_ReleaseUser(userp);
6055 lock_ReleaseWrite(&scp->rw);