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>
15 #include <afs/unified_afs.h>
29 extern void afsi_log(char *pattern, ...);
32 int cm_enableServerLocks = 1;
34 int cm_followBackupPath = 0;
37 * Case-folding array. This was constructed by inspecting of SMBtrace output.
38 * I do not know anything more about it.
40 unsigned char cm_foldUpper[256] = {
41 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
42 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
43 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
44 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
45 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
46 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
47 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
48 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
49 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
50 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
51 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
52 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
53 0x60, 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, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
57 0x80, 0x9a, 0x90, 0x41, 0x8e, 0x41, 0x8f, 0x80,
58 0x45, 0x45, 0x45, 0x49, 0x49, 0x49, 0x8e, 0x8f,
59 0x90, 0x92, 0x92, 0x4f, 0x99, 0x4f, 0x55, 0x55,
60 0x59, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
61 0x41, 0x49, 0x4f, 0x55, 0xa5, 0xa5, 0x56, 0xa7,
62 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
63 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
64 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
65 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
66 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
67 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
68 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
69 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
70 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
71 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
72 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
76 * Case-insensitive string comparison. We used to use stricmp, but it doesn't
77 * know about 8-bit characters (e.g. 129 is lowercase u-umlaut, 154 is
78 * upper-case u-umlaut).
80 int cm_stricmp(const char *str1, const char *str2)
92 c1 = (char) cm_foldUpper[(unsigned char)(*str1++)];
93 c2 = (char) cm_foldUpper[(unsigned char)(*str2++)];
103 /* return success if we can open this file in this mode */
104 long cm_CheckOpen(cm_scache_t *scp, int openMode, int trunc, cm_user_t *userp,
112 rights |= PRSFS_READ;
113 if (openMode == 1 || openMode == 2 || trunc)
114 rights |= PRSFS_WRITE;
116 lock_ObtainWrite(&scp->rw);
118 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
119 CM_SCACHESYNC_GETSTATUS
120 | CM_SCACHESYNC_NEEDCALLBACK
121 | CM_SCACHESYNC_LOCK);
124 ((rights & PRSFS_WRITE) || (rights & PRSFS_READ)) &&
125 scp->fileType == CM_SCACHETYPE_FILE) {
128 unsigned int sLockType;
129 LARGE_INTEGER LOffset, LLength;
131 /* Check if there's some sort of lock on the file at the
134 key = cm_GenerateKey(CM_SESSION_CMINT,0,0);
136 if (rights & PRSFS_WRITE)
139 sLockType = LOCKING_ANDX_SHARED_LOCK;
141 LOffset.HighPart = CM_FLSHARE_OFFSET_HIGH;
142 LOffset.LowPart = CM_FLSHARE_OFFSET_LOW;
143 LLength.HighPart = CM_FLSHARE_LENGTH_HIGH;
144 LLength.LowPart = CM_FLSHARE_LENGTH_LOW;
146 code = cm_Lock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp, NULL);
149 cm_Unlock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp);
151 /* In this case, we allow the file open to go through even
152 though we can't enforce mandatory locking on the
154 if (code == CM_ERROR_NOACCESS &&
155 !(rights & PRSFS_WRITE))
158 if (code == CM_ERROR_LOCK_NOT_GRANTED)
159 code = CM_ERROR_SHARING_VIOLATION;
163 } else if (code != 0) {
167 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
171 lock_ReleaseWrite(&scp->rw);
176 /* return success if we can open this file in this mode */
177 long cm_CheckNTOpen(cm_scache_t *scp,
178 unsigned int desiredAccess,
179 unsigned int shareAccess,
180 unsigned int createDisp,
181 afs_offs_t process_id,
182 afs_offs_t handle_id,
183 cm_user_t *userp, cm_req_t *reqp,
184 cm_lock_data_t **ldpp)
188 afs_uint16 session_id;
190 osi_assertx(ldpp != NULL, "null cm_lock_data_t");
193 /* compute the session id */
194 if (reqp->flags & CM_REQ_SOURCE_SMB)
195 session_id = CM_SESSION_SMB;
196 else if (reqp->flags & CM_REQ_SOURCE_REDIR)
197 session_id = CM_SESSION_IFS;
199 session_id = CM_SESSION_CMINT;
201 /* Ignore the SYNCHRONIZE privilege */
202 desiredAccess &= ~SYNCHRONIZE;
204 /* Always allow delete; the RPC will tell us if it's OK */
207 if (desiredAccess == DELETE)
210 /* Always allow reading attributes (Hidden, System, Readonly, ...) */
211 if (desiredAccess == FILE_READ_ATTRIBUTES)
214 if (desiredAccess & (AFS_ACCESS_READ|AFS_ACCESS_EXECUTE))
215 rights |= (scp->fileType == CM_SCACHETYPE_DIRECTORY ? PRSFS_LOOKUP : PRSFS_READ);
217 /* We used to require PRSFS_WRITE if createDisp was 4
218 (OPEN_ALWAYS) even if AFS_ACCESS_WRITE was not requested.
219 However, we don't need to do that since the existence of the
220 scp implies that we don't need to create it. */
221 if (desiredAccess & AFS_ACCESS_WRITE)
222 rights |= PRSFS_WRITE;
224 if (desiredAccess & DELETE)
225 rights |= PRSFS_DELETE;
227 lock_ObtainWrite(&scp->rw);
229 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
230 CM_SCACHESYNC_GETSTATUS
231 | CM_SCACHESYNC_NEEDCALLBACK
232 | CM_SCACHESYNC_LOCK);
235 * If the open will fail because the volume is readonly, then we will
236 * return an access denied error instead. This is to help brain-dead
237 * apps run correctly on replicated volumes.
238 * See defect 10007 for more information.
240 if (code == CM_ERROR_READONLY)
241 code = CM_ERROR_NOACCESS;
244 !(shareAccess & FILE_SHARE_WRITE) &&
245 ((rights & PRSFS_WRITE) || (rights & PRSFS_READ)) &&
246 scp->fileType == CM_SCACHETYPE_FILE) {
248 unsigned int sLockType;
249 LARGE_INTEGER LOffset, LLength;
251 /* Check if there's some sort of lock on the file at the
254 if (rights & PRSFS_WRITE)
257 sLockType = LOCKING_ANDX_SHARED_LOCK;
259 key = cm_GenerateKey(session_id, process_id, 0);
261 /* single byte lock at offset 0x0100 0000 0000 0000 */
262 LOffset.HighPart = CM_FLSHARE_OFFSET_HIGH;
263 LOffset.LowPart = CM_FLSHARE_OFFSET_LOW;
264 LLength.HighPart = CM_FLSHARE_LENGTH_HIGH;
265 LLength.LowPart = CM_FLSHARE_LENGTH_LOW;
267 code = cm_Lock(scp, sLockType, LOffset, LLength, key, 0, userp, reqp, NULL);
270 (*ldpp) = (cm_lock_data_t *)malloc(sizeof(cm_lock_data_t));
277 (*ldpp)->sLockType = sLockType;
278 (*ldpp)->LOffset.HighPart = LOffset.HighPart;
279 (*ldpp)->LOffset.LowPart = LOffset.LowPart;
280 (*ldpp)->LLength.HighPart = LLength.HighPart;
281 (*ldpp)->LLength.LowPart = LLength.LowPart;
284 * In this case, we allow the file open to go through even
285 * though we can't enforce mandatory locking on the
287 if (code == CM_ERROR_NOACCESS &&
288 !(rights & PRSFS_WRITE))
291 if (code == CM_ERROR_LOCK_NOT_GRANTED)
292 code = CM_ERROR_SHARING_VIOLATION;
295 } else if (code != 0) {
300 lock_ReleaseWrite(&scp->rw);
303 osi_Log3(afsd_logp,"cm_CheckNTOpen scp 0x%p ldp 0x%p code 0x%x", scp, *ldpp, code);
307 extern long cm_CheckNTOpenDone(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp,
308 cm_lock_data_t ** ldpp)
310 osi_Log2(afsd_logp,"cm_CheckNTOpenDone scp 0x%p ldp 0x%p", scp, ldpp ? *ldpp : 0);
311 lock_ObtainWrite(&scp->rw);
313 cm_Unlock(scp, (*ldpp)->sLockType, (*ldpp)->LOffset, (*ldpp)->LLength,
314 (*ldpp)->key, 0, userp, reqp);
318 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
319 lock_ReleaseWrite(&scp->rw);
323 * When CAP_NT_SMBS has been negotiated, deletion (of files or directories) is
324 * done in three steps:
325 * (1) open for deletion (NT_CREATE_AND_X)
326 * (2) set for deletion on close (NT_TRANSACTION2, SET_FILE_INFO)
328 * We must not do the RPC until step 3. But if we are going to return an error
329 * code (e.g. directory not empty), we must return it by step 2, otherwise most
330 * clients will not notice it. So we do a preliminary check. For deleting
331 * files, this is almost free, since we have already done the RPC to get the
332 * parent directory's status bits. But for deleting directories, we must do an
333 * additional RPC to get the directory's data to check if it is empty. Sigh.
335 long cm_CheckNTDelete(cm_scache_t *dscp, cm_scache_t *scp, cm_user_t *userp,
341 cm_dirEntry_t *dep = 0;
342 unsigned short *hashTable;
344 int BeyondPage = 0, HaveDot = 0, HaveDotDot = 0;
347 /* First check permissions */
348 lock_ObtainWrite(&scp->rw);
349 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_DELETE,
350 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
352 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
353 lock_ReleaseWrite(&scp->rw);
357 /* If deleting directory, must be empty */
359 if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
362 thyper.HighPart = 0; thyper.LowPart = 0;
363 code = buf_Get(scp, &thyper, reqp, &bufferp);
367 lock_ObtainMutex(&bufferp->mx);
368 lock_ObtainWrite(&scp->rw);
371 code = cm_SyncOp(scp, bufferp, userp, reqp, 0,
372 CM_SCACHESYNC_NEEDCALLBACK
374 | CM_SCACHESYNC_BUFLOCKED);
378 if (cm_HaveBuffer(scp, bufferp, 1))
381 /* otherwise, load the buffer and try again */
382 lock_ReleaseMutex(&bufferp->mx);
383 code = cm_GetBuffer(scp, bufferp, NULL, userp, reqp);
384 lock_ReleaseWrite(&scp->rw);
385 lock_ObtainMutex(&bufferp->mx);
386 lock_ObtainWrite(&scp->rw);
387 cm_SyncOpDone(scp, bufferp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ | CM_SCACHESYNC_BUFLOCKED);
392 lock_ReleaseWrite(&scp->rw);
395 /* We try to determine emptiness without looking beyond the first page,
396 * and without assuming "." and ".." are present and are on the first
397 * page (though these assumptions might, after all, be reasonable).
399 hashTable = (unsigned short *)(bufferp->datap + (32 * 5));
400 for (i=0; i<128; i++) {
401 idx = ntohs(hashTable[i]);
407 dep = (cm_dirEntry_t *)(bufferp->datap + (32 * idx));
408 if (strcmp(dep->name, ".") == 0)
410 else if (strcmp(dep->name, "..") == 0)
413 code = CM_ERROR_NOTEMPTY;
416 idx = ntohs(dep->next);
419 if (BeyondPage && HaveDot && HaveDotDot)
420 code = CM_ERROR_NOTEMPTY;
424 lock_ReleaseMutex(&bufferp->mx);
425 buf_Release(bufferp);
427 lock_ReleaseWrite(&scp->rw);
432 * Iterate through all entries in a directory.
433 * When the function funcp is called, the buffer is locked but the
434 * directory vnode is not.
436 * If the retscp parameter is not NULL, the parmp must be a
437 * cm_lookupSearch_t object.
439 long cm_ApplyDir(cm_scache_t *scp, cm_DirFuncp_t funcp, void *parmp,
440 osi_hyper_t *startOffsetp, cm_user_t *userp, cm_req_t *reqp,
441 cm_scache_t **retscp)
445 cm_dirEntry_t *dep = 0;
448 osi_hyper_t dirLength;
449 osi_hyper_t bufferOffset;
450 osi_hyper_t curOffset;
454 cm_pageHeader_t *pageHeaderp;
456 long nextEntryCookie;
457 int numDirChunks; /* # of 32 byte dir chunks in this entry */
459 /* get the directory size */
460 lock_ObtainWrite(&scp->rw);
461 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_LOOKUP,
462 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
463 lock_ReleaseWrite(&scp->rw);
467 if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
468 return CM_ERROR_NOTDIR;
470 if (retscp) /* if this is a lookup call */
472 cm_lookupSearch_t* sp = parmp;
475 #ifdef AFS_FREELANCE_CLIENT
476 /* Freelance entries never end up in the DNLC because they
477 * do not have an associated cm_server_t
479 !(cm_freelanceEnabled &&
480 sp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
481 sp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
482 #else /* !AFS_FREELANCE_CLIENT */
487 int casefold = sp->caseFold;
488 sp->caseFold = 0; /* we have a strong preference for exact matches */
489 if ( *retscp = cm_dnlcLookup(scp, sp)) /* dnlc hit */
491 sp->caseFold = casefold;
494 sp->caseFold = casefold;
498 * see if we can find it using the directory hash tables.
499 * we can only do exact matches, since the hash is case
502 if (funcp != (cm_DirFuncp_t)cm_BPlusDirFoo)
511 code = cm_BeginDirOp(scp, userp, reqp, CM_DIRLOCK_READ,
512 CM_DIROP_FLAG_NONE, &dirop);
516 code = cm_BPlusDirLookup(&dirop, sp->nsearchNamep, &sp->fid);
521 code = cm_DirLookup(&dirop, sp->searchNamep, &sp->fid);
529 sp->ExactFound = TRUE;
530 *retscp = NULL; /* force caller to call cm_GetSCache() */
535 if (sp->caseFold && code == CM_ERROR_INEXACT_MATCH) {
538 sp->ExactFound = FALSE;
539 *retscp = NULL; /* force caller to call cm_GetSCache() */
543 return CM_ERROR_BPLUS_NOMATCH;
550 * XXX We only get the length once. It might change when we drop the
553 dirLength = scp->length;
556 bufferOffset.LowPart = bufferOffset.HighPart = 0;
558 curOffset = *startOffsetp;
560 curOffset.HighPart = 0;
561 curOffset.LowPart = 0;
565 /* make sure that curOffset.LowPart doesn't point to the first
566 * 32 bytes in the 2nd through last dir page, and that it
567 * doesn't point at the first 13 32-byte chunks in the first
568 * dir page, since those are dir and page headers, and don't
569 * contain useful information.
571 temp = curOffset.LowPart & (2048-1);
572 if (curOffset.HighPart == 0 && curOffset.LowPart < 2048) {
573 /* we're in the first page */
574 if (temp < 13*32) temp = 13*32;
577 /* we're in a later dir page */
578 if (temp < 32) temp = 32;
581 /* make sure the low order 5 bits are zero */
584 /* now put temp bits back ito curOffset.LowPart */
585 curOffset.LowPart &= ~(2048-1);
586 curOffset.LowPart |= temp;
588 /* check if we've passed the dir's EOF */
589 if (LargeIntegerGreaterThanOrEqualTo(curOffset, dirLength))
592 /* see if we can use the bufferp we have now; compute in which
593 * page the current offset would be, and check whether that's
594 * the offset of the buffer we have. If not, get the buffer.
596 thyper.HighPart = curOffset.HighPart;
597 thyper.LowPart = curOffset.LowPart & ~(cm_data.buf_blockSize-1);
598 if (!bufferp || !LargeIntegerEqualTo(thyper, bufferOffset)) {
601 lock_ReleaseMutex(&bufferp->mx);
602 buf_Release(bufferp);
606 code = buf_Get(scp, &thyper, reqp, &bufferp);
608 /* if buf_Get() fails we do not have a buffer object to lock */
613 lock_ObtainMutex(&bufferp->mx);
614 bufferOffset = thyper;
616 /* now get the data in the cache */
618 lock_ObtainWrite(&scp->rw);
619 code = cm_SyncOp(scp, bufferp, userp, reqp,
621 CM_SCACHESYNC_NEEDCALLBACK
623 | CM_SCACHESYNC_BUFLOCKED);
625 lock_ReleaseWrite(&scp->rw);
628 cm_SyncOpDone(scp, bufferp, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ | CM_SCACHESYNC_BUFLOCKED);
630 if (cm_HaveBuffer(scp, bufferp, 1)) {
631 lock_ReleaseWrite(&scp->rw);
635 /* otherwise, load the buffer and try again */
636 lock_ReleaseMutex(&bufferp->mx);
637 code = cm_GetBuffer(scp, bufferp, NULL, userp,
639 lock_ReleaseWrite(&scp->rw);
640 lock_ObtainMutex(&bufferp->mx);
645 lock_ReleaseMutex(&bufferp->mx);
646 buf_Release(bufferp);
650 } /* if (wrong buffer) ... */
652 /* now we have the buffer containing the entry we're interested
653 * in; copy it out if it represents a non-deleted entry.
655 entryInDir = curOffset.LowPart & (2048-1);
656 entryInBuffer = curOffset.LowPart & (cm_data.buf_blockSize - 1);
658 /* page header will help tell us which entries are free. Page
659 * header can change more often than once per buffer, since
660 * AFS 3 dir page size may be less than (but not more than) a
661 * buffer package buffer.
663 /* only look intra-buffer */
664 temp = curOffset.LowPart & (cm_data.buf_blockSize - 1);
665 temp &= ~(2048 - 1); /* turn off intra-page bits */
666 pageHeaderp = (cm_pageHeader_t *) (bufferp->datap + temp);
668 /* now determine which entry we're looking at in the page. If
669 * it is free (there's a free bitmap at the start of the dir),
670 * we should skip these 32 bytes.
672 slotInPage = (entryInDir & 0x7e0) >> 5;
673 if (!(pageHeaderp->freeBitmap[slotInPage>>3]
674 & (1 << (slotInPage & 0x7)))) {
675 /* this entry is free */
676 numDirChunks = 1; /* only skip this guy */
680 tp = bufferp->datap + entryInBuffer;
681 dep = (cm_dirEntry_t *) tp; /* now points to AFS3 dir entry */
684 * here are some consistency checks
686 if (dep->flag != CM_DIR_FFIRST ||
687 strlen(dep->name) > 256) {
688 code = CM_ERROR_INVAL;
690 "cm_ApplyDir invalid directory entry for scp %p bufp %p",
692 osi_Log4(afsd_logp,"... cell %u vol %u vnode %u uniq %u",
693 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
694 bufferp->dataVersion = CM_BUF_VERSION_BAD;
698 /* while we're here, compute the next entry's location, too,
699 * since we'll need it when writing out the cookie into the
700 * dir listing stream.
702 numDirChunks = cm_NameEntries(dep->name, NULL);
704 /* compute the offset of the cookie representing the next entry */
705 nextEntryCookie = curOffset.LowPart
706 + (CM_DIR_CHUNKSIZE * numDirChunks);
708 if (dep->fid.vnode != 0) {
709 /* this is one of the entries to use: it is not deleted */
710 code = (*funcp)(scp, dep, parmp, &curOffset);
713 } /* if we're including this name */
716 /* and adjust curOffset to be where the new cookie is */
718 thyper.LowPart = CM_DIR_CHUNKSIZE * numDirChunks;
719 curOffset = LargeIntegerAdd(thyper, curOffset);
720 } /* while copying data for dir listing */
722 /* release the mutex */
724 lock_ReleaseMutex(&bufferp->mx);
725 buf_Release(bufferp);
730 int cm_NoneUpper(normchar_t *s)
734 if (c >= 'A' && c <= 'Z')
739 int cm_NoneLower(normchar_t *s)
743 if (c >= 'a' && c <= 'z')
748 long cm_LookupSearchProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
751 cm_lookupSearch_t *sp;
753 normchar_t matchName[MAX_PATH];
754 int looking_for_short_name = FALSE;
756 sp = (cm_lookupSearch_t *) rockp;
758 if (cm_FsStringToNormString(dep->name, -1, matchName, lengthof(matchName)) == 0) {
759 /* Can't normalize FS string. */
764 match = cm_NormStrCmpI(matchName, sp->nsearchNamep);
766 match = cm_NormStrCmp(matchName, sp->nsearchNamep);
771 && !cm_Is8Dot3(matchName)) {
773 cm_Gen8Dot3NameInt(dep->name, &dep->fid, matchName, NULL);
775 match = cm_NormStrCmpI(matchName, sp->nsearchNamep);
777 match = cm_NormStrCmp(matchName, sp->nsearchNamep);
778 looking_for_short_name = TRUE;
788 if (!sp->caseFold || looking_for_short_name) {
789 cm_SetFid(&sp->fid, sp->fid.cell, sp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
790 return CM_ERROR_STOPNOW;
794 * If we get here, we are doing a case-insensitive search, and we
795 * have found a match. Now we determine what kind of match it is:
796 * exact, lower-case, upper-case, or none of the above. This is done
797 * in order to choose among matches, if there are more than one.
800 /* Exact matches are the best. */
801 match = cm_NormStrCmp(matchName, sp->nsearchNamep);
804 cm_SetFid(&sp->fid, sp->fid.cell, sp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
805 return CM_ERROR_STOPNOW;
808 /* Lower-case matches are next. */
811 if (cm_NoneUpper(matchName)) {
816 /* Upper-case matches are next. */
819 if (cm_NoneLower(matchName)) {
824 /* General matches are last. */
830 cm_SetFid(&sp->fid, sp->fid.cell, sp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
834 /* read the contents of a mount point into the appropriate string.
835 * called with write locked scp, and returns with locked scp.
837 long cm_ReadMountPoint(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp)
841 code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_FETCHDATA);
845 if (scp->mountPointStringp[0] &&
846 scp->mpDataVersion == scp->dataVersion) {
851 #ifdef AFS_FREELANCE_CLIENT
852 /* File servers do not have data for freelance entries */
853 if (cm_freelanceEnabled &&
854 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
855 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
857 code = cm_FreelanceFetchMountPointString(scp);
859 #endif /* AFS_FREELANCE_CLIENT */
861 char temp[MOUNTPOINTLEN];
864 /* otherwise, we have to read it in */
865 offset.LowPart = offset.HighPart = 0;
866 code = cm_GetData(scp, &offset, temp, MOUNTPOINTLEN, userp, reqp);
871 * scp->length is the actual length of the mount point string.
872 * It is current because cm_GetData merged the most up to date
873 * status info into scp and has not dropped the rwlock since.
875 if (scp->length.LowPart > MOUNTPOINTLEN - 1) {
876 code = CM_ERROR_TOOBIG;
880 if (scp->length.LowPart == 0) {
881 code = CM_ERROR_INVAL;
885 /* convert the terminating dot to a NUL */
886 temp[scp->length.LowPart - 1] = 0;
887 memcpy(scp->mountPointStringp, temp, scp->length.LowPart);
888 scp->mpDataVersion = scp->dataVersion;
892 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHDATA);
898 /* called with a locked scp and chases the mount point, yielding outScpp.
899 * scp remains write locked, just for simplicity of describing the interface.
901 long cm_FollowMountPoint(cm_scache_t *scp, cm_scache_t *dscp, cm_user_t *userp,
902 cm_req_t *reqp, cm_scache_t **outScpp)
904 fschar_t *cellNamep = NULL;
905 fschar_t *volNamep = NULL;
909 cm_volume_t *volp = NULL;
918 if (scp->mountRootFid.cell != 0 && scp->mountRootGen >= cm_data.mountRootGen) {
919 tfid = scp->mountRootFid;
920 lock_ReleaseWrite(&scp->rw);
921 code = cm_GetSCache(&tfid, NULL, outScpp, userp, reqp);
922 lock_ObtainWrite(&scp->rw);
926 /* parse the volume name */
927 mpNamep = scp->mountPointStringp;
929 return CM_ERROR_NOSUCHPATH;
930 mtType = *scp->mountPointStringp;
932 cp = cm_FsStrChr(mpNamep, _FS(':'));
934 /* cellular mount point */
935 cellNamep = (fschar_t *)malloc((cp - mpNamep) * sizeof(fschar_t));
936 cm_FsStrCpyN(cellNamep, cp - mpNamep, mpNamep + 1, cp - mpNamep - 1);
937 volNamep = cm_FsStrDup(cp+1);
939 /* now look up the cell */
940 lock_ReleaseWrite(&scp->rw);
941 cellp = cm_GetCell(cellNamep, CM_FLAG_CREATE|CM_FLAG_NOPROBE);
942 lock_ObtainWrite(&scp->rw);
945 volNamep = cm_FsStrDup(mpNamep + 1);
947 #ifdef AFS_FREELANCE_CLIENT
949 * Mount points in the Freelance cell should default
950 * to the workstation cell.
952 if (cm_freelanceEnabled &&
953 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
954 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
956 fschar_t rootCellName[256]="";
957 cm_GetRootCellName(rootCellName);
958 cellp = cm_GetCell(rootCellName, 0);
960 #endif /* AFS_FREELANCE_CLIENT */
961 cellp = cm_FindCellByID(scp->fid.cell, 0);
965 code = CM_ERROR_NOSUCHCELL;
969 vnLength = cm_FsStrLen(volNamep);
970 if (vnLength >= 8 && cm_FsStrCmp(volNamep + vnLength - 7, ".backup") == 0)
971 targetType = BACKVOL;
972 else if (vnLength >= 10
973 && cm_FsStrCmp(volNamep + vnLength - 9, ".readonly") == 0)
978 /* check for backups within backups */
979 if (targetType == BACKVOL
980 && (scp->flags & (CM_SCACHEFLAG_RO | CM_SCACHEFLAG_PURERO))
981 == CM_SCACHEFLAG_RO) {
982 code = CM_ERROR_NOSUCHVOLUME;
986 /* now we need to get the volume */
987 lock_ReleaseWrite(&scp->rw);
988 if (cm_VolNameIsID(volNamep)) {
989 code = cm_FindVolumeByID(cellp, atoi(volNamep), userp, reqp,
990 CM_GETVOL_FLAG_CREATE, &volp);
992 code = cm_FindVolumeByName(cellp, volNamep, userp, reqp,
993 CM_GETVOL_FLAG_CREATE, &volp);
995 lock_ObtainWrite(&scp->rw);
998 afs_uint32 cell, volume;
999 cm_vol_state_t *statep;
1001 cell = cellp->cellID;
1003 /* if the mt pt originates in a .backup volume (not a .readonly)
1004 * and FollowBackupPath is active, and if there is a .backup
1005 * volume for the target, then use the .backup of the target
1006 * instead of the read-write.
1008 if (cm_followBackupPath &&
1009 volp->vol[BACKVOL].ID != 0 &&
1010 (dscp->flags & (CM_SCACHEFLAG_RO|CM_SCACHEFLAG_PURERO)) == CM_SCACHEFLAG_RO &&
1011 (targetType == RWVOL || targetType == ROVOL && volp->vol[ROVOL].ID == 0)
1013 targetType = BACKVOL;
1015 /* if the mt pt is in a read-only volume (not just a
1016 * backup), and if there is a read-only volume for the
1017 * target, and if this is a targetType '#' mount point, use
1018 * the read-only, otherwise use the one specified.
1020 else if (mtType == '#' && targetType == RWVOL &&
1021 (scp->flags & CM_SCACHEFLAG_PURERO) &&
1022 volp->vol[ROVOL].ID != 0) {
1026 lock_ObtainWrite(&volp->rw);
1027 statep = cm_VolumeStateByType(volp, targetType);
1028 volume = statep->ID;
1029 statep->dotdotFid = dscp->fid;
1030 lock_ReleaseWrite(&volp->rw);
1032 /* the rest of the fid is a magic number */
1033 cm_SetFid(&scp->mountRootFid, cell, volume, 1, 1);
1034 scp->mountRootGen = cm_data.mountRootGen;
1036 tfid = scp->mountRootFid;
1037 lock_ReleaseWrite(&scp->rw);
1038 code = cm_GetSCache(&tfid, NULL, outScpp, userp, reqp);
1039 lock_ObtainWrite(&scp->rw);
1052 long cm_LookupInternal(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_user_t *userp,
1053 cm_req_t *reqp, cm_scache_t **outScpp)
1056 int dnlcHit = 1; /* did we hit in the dnlc? yes, we did */
1057 cm_scache_t *tscp = NULL;
1058 cm_scache_t *mountedScp;
1059 cm_lookupSearch_t rock;
1061 normchar_t *nnamep = NULL;
1062 fschar_t *fnamep = NULL;
1067 memset(&rock, 0, sizeof(rock));
1069 if (dscp->fid.vnode == 1 && dscp->fid.unique == 1
1070 && cm_ClientStrCmp(cnamep, _C("..")) == 0) {
1071 if (dscp->dotdotFid.volume == 0)
1072 return CM_ERROR_NOSUCHVOLUME;
1073 rock.fid = dscp->dotdotFid;
1075 } else if (cm_ClientStrCmp(cnamep, _C(".")) == 0) {
1076 rock.fid = dscp->fid;
1080 nnamep = cm_ClientStringToNormStringAlloc(cnamep, -1, NULL);
1082 code = CM_ERROR_NOSUCHFILE;
1085 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
1087 code = CM_ERROR_NOSUCHFILE;
1092 if (flags & CM_FLAG_NOMOUNTCHASE) {
1093 /* In this case, we should go and call cm_Dir* functions
1094 directly since the following cm_ApplyDir() function will
1102 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
1103 CM_DIROP_FLAG_NONE, &dirop);
1106 code = cm_BPlusDirLookup(&dirop, nnamep, &rock.fid);
1111 code = cm_DirLookup(&dirop, fnamep, &rock.fid);
1113 cm_EndDirOp(&dirop);
1123 if (code == CM_ERROR_INEXACT_MATCH && (flags & CM_FLAG_CASEFOLD)) {
1130 code = CM_ERROR_BPLUS_NOMATCH;
1136 rock.fid.cell = dscp->fid.cell;
1137 rock.fid.volume = dscp->fid.volume;
1138 rock.searchNamep = fnamep;
1139 rock.nsearchNamep = nnamep;
1140 rock.caseFold = (flags & CM_FLAG_CASEFOLD);
1141 rock.hasTilde = ((cm_ClientStrChr(cnamep, '~') != NULL) ? 1 : 0);
1143 /* If NOMOUNTCHASE, bypass DNLC by passing NULL scp pointer */
1144 code = cm_ApplyDir(dscp, cm_LookupSearchProc, &rock, NULL, userp, reqp,
1145 (flags & CM_FLAG_NOMOUNTCHASE) ? NULL : &tscp);
1147 /* code == 0 means we fell off the end of the dir, while stopnow means
1148 * that we stopped early, probably because we found the entry we're
1149 * looking for. Any other non-zero code is an error.
1151 if (code && code != CM_ERROR_STOPNOW) {
1152 /* if the cm_scache_t we are searching in is not a directory
1153 * we must return path not found because the error
1154 * is to describe the final component not an intermediary
1156 if (code == CM_ERROR_NOTDIR) {
1157 if (flags & CM_FLAG_CHECKPATH)
1158 code = CM_ERROR_NOSUCHPATH;
1160 code = CM_ERROR_NOSUCHFILE;
1166 getroot = (dscp==cm_data.rootSCachep) ;
1168 if (!(cm_freelanceEnabled && cm_freelanceDiscovery) || !getroot) {
1169 if (flags & CM_FLAG_CHECKPATH)
1170 code = CM_ERROR_NOSUCHPATH;
1172 code = CM_ERROR_NOSUCHFILE;
1175 else if (!cm_ClientStrChr(cnamep, '#') &&
1176 !cm_ClientStrChr(cnamep, '%') &&
1177 cm_ClientStrCmpI(cnamep, _C("srvsvc")) &&
1178 cm_ClientStrCmpI(cnamep, _C("wkssvc")) &&
1179 cm_ClientStrCmpI(cnamep, _C("ipc$")))
1181 /* nonexistent dir on freelance root, so add it */
1182 fschar_t fullname[CELL_MAXNAMELEN + 1] = "."; /* +1 so that when we skip the . the size is still CELL_MAXNAMELEN */
1186 osi_Log1(afsd_logp,"cm_Lookup adding mount for non-existent directory: %S",
1187 osi_LogSaveClientString(afsd_logp,cnamep));
1190 * There is an ugly behavior where a share name "foo" will be searched
1191 * for as "fo". If the searched for name differs by an already existing
1192 * symlink or mount point in the Freelance directory, do not add the
1193 * new value automatically.
1197 fnlen = strlen(fnamep);
1198 if ( fnamep[fnlen-1] == '.') {
1199 fnamep[fnlen-1] = '\0';
1204 if (cnamep[0] == '.') {
1205 if (cm_GetCell_Gen(&fnamep[1], &fullname[1], CM_FLAG_CREATE)) {
1207 code = cm_FreelanceAddMount(fullname, &fullname[1], "root.cell", 1, &rock.fid);
1208 if ( cm_FsStrCmpI(&fnamep[1], &fullname[1])) {
1210 * Do not permit symlinks that are one of:
1211 * . the cellname followed by a dot
1212 * . the cellname minus a single character
1213 * . a substring of the cellname that does not consist of full components
1215 if ( cm_strnicmp_utf8(&fnamep[1], fullname, (int)fnlen-1) == 0 &&
1216 (fnlen-1 == strlen(fullname)-1 || fullname[fnlen-1] != '.'))
1218 /* do not add; substitute fullname for the search */
1220 fnamep = malloc(strlen(fullname)+2);
1222 strncpy(&fnamep[1], fullname, strlen(fullname)+1);
1225 code = cm_FreelanceAddSymlink(fnamep, fullname, &rock.fid);
1230 if (cm_GetCell_Gen(fnamep, fullname, CM_FLAG_CREATE)) {
1232 code = cm_FreelanceAddMount(fullname, fullname, "root.cell", 0, &rock.fid);
1233 if ( cm_FsStrCmpI(fnamep, fullname)) {
1235 * Do not permit symlinks that are one of:
1236 * . the cellname followed by a dot
1237 * . the cellname minus a single character
1238 * . a substring of the cellname that does not consist of full components
1240 if ( cm_strnicmp_utf8(fnamep, fullname, (int)fnlen-1) == 0 &&
1241 (fnlen == strlen(fullname)-1 || fullname[fnlen] != '.'))
1243 /* do not add; substitute fullname for the search */
1245 fnamep = strdup(fullname);
1249 code = cm_FreelanceAddSymlink(fnamep, fullname, &rock.fid);
1258 nnamep = cm_FsStringToNormStringAlloc(fnamep, -1, NULL);
1262 if (!found || code) { /* add mount point failed, so give up */
1263 if (flags & CM_FLAG_CHECKPATH)
1264 code = CM_ERROR_NOSUCHPATH;
1266 code = CM_ERROR_NOSUCHFILE;
1269 tscp = NULL; /* to force call of cm_GetSCache */
1271 if (flags & CM_FLAG_CHECKPATH)
1272 code = CM_ERROR_NOSUCHPATH;
1274 code = CM_ERROR_NOSUCHFILE;
1280 if ( !tscp ) /* we did not find it in the dnlc */
1283 code = cm_GetSCache(&rock.fid, &dscp->fid, &tscp, userp, reqp);
1287 /* tscp is now held */
1289 lock_ObtainWrite(&tscp->rw);
1292 * Do not get status if we do not already have a callback or know the type.
1293 * The process of reading the mount point string will obtain status information
1294 * in a single RPC. No reason to add a second round trip.
1296 * If we do have a callback, use cm_SyncOp to get status in case the
1297 * current cm_user_t is not the same as the one that obtained the
1298 * mount point string contents.
1300 if (cm_HaveCallback(tscp) || tscp->fileType == CM_SCACHETYPE_UNKNOWN) {
1301 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
1302 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
1304 lock_ReleaseWrite(&tscp->rw);
1305 cm_ReleaseSCache(tscp);
1308 cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
1310 /* tscp is now locked */
1312 if (!(flags & CM_FLAG_NOMOUNTCHASE)
1313 && tscp->fileType == CM_SCACHETYPE_MOUNTPOINT) {
1314 /* mount points are funny: they have a volume name to mount
1317 code = cm_ReadMountPoint(tscp, userp, reqp);
1319 code = cm_FollowMountPoint(tscp, dscp, userp, reqp,
1321 lock_ReleaseWrite(&tscp->rw);
1322 cm_ReleaseSCache(tscp);
1329 lock_ReleaseWrite(&tscp->rw);
1332 /* copy back pointer */
1335 /* insert scache in dnlc */
1336 if ( !dnlcHit && !(flags & CM_FLAG_NOMOUNTCHASE) && rock.ExactFound ) {
1337 /* lock the directory entry to prevent racing callback revokes */
1338 lock_ObtainRead(&dscp->rw);
1339 if ( dscp->cbServerp != NULL && dscp->cbExpires > 0 ) {
1340 /* TODO: reuse nnamep from above */
1343 nnamep = cm_ClientStringToNormStringAlloc(cnamep, -1, NULL);
1345 cm_dnlcEnter(dscp, nnamep, tscp);
1347 lock_ReleaseRead(&dscp->rw);
1364 int cm_ExpandSysName(cm_req_t * reqp, clientchar_t *inp, clientchar_t *outp, long outSizeCch, unsigned int index)
1369 int use_sysname64 = 0;
1371 if (cm_sysName64Count > 0 && reqp && !(reqp->flags & CM_REQ_WOW64) && (reqp->flags & CM_REQ_SOURCE_REDIR))
1375 tp = cm_ClientStrRChr(inp, '@');
1377 return 0; /* no @sys */
1379 if (cm_ClientStrCmp(tp, _C("@sys")) != 0)
1380 return 0; /* no @sys */
1382 /* caller just wants to know if this is a valid @sys type of name */
1387 if (use_sysname64 && index >= cm_sysName64Count)
1391 if (index >= cm_sysNameCount)
1394 /* otherwise generate the properly expanded @sys name */
1395 prefixCount = (int)(tp - inp);
1397 cm_ClientStrCpyN(outp, outSizeCch, inp, prefixCount); /* copy out "a." from "a.@sys" */
1398 outp[prefixCount] = 0; /* null terminate the "a." */
1401 cm_ClientStrCat(outp, outSizeCch, cm_sysName64List[index]);
1404 cm_ClientStrCat(outp, outSizeCch, cm_sysNameList[index]);
1409 long cm_EvaluateVolumeReference(clientchar_t * namep, long flags, cm_user_t * userp,
1410 cm_req_t *reqp, cm_scache_t ** outScpp)
1412 afs_uint32 code = 0;
1413 fschar_t cellName[CELL_MAXNAMELEN];
1414 fschar_t volumeName[VL_MAXNAMELEN];
1418 fschar_t * fnamep = NULL;
1420 cm_cell_t * cellp = NULL;
1421 cm_volume_t * volp = NULL;
1425 int mountType = RWVOL;
1427 osi_Log1(afsd_logp, "cm_EvaluateVolumeReference for string [%S]",
1428 osi_LogSaveClientString(afsd_logp, namep));
1430 if (cm_ClientStrCmpNI(namep, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH) != 0) {
1431 goto _exit_invalid_path;
1434 /* namep is assumed to look like the following:
1436 @vol:<cellname>%<volume>\0
1438 @vol:<cellname>#<volume>\0
1442 fnamep = cm_ClientStringToFsStringAlloc(namep, -1, NULL);
1443 cp = fnamep + CM_PREFIX_VOL_CCH; /* cp points to cell name, hopefully */
1444 tp = cm_FsStrChr(cp, '%');
1446 tp = cm_FsStrChr(cp, '#');
1448 (len = tp - cp) == 0 ||
1449 len > CELL_MAXNAMELEN)
1450 goto _exit_invalid_path;
1451 cm_FsStrCpyN(cellName, lengthof(cellName), cp, len);
1456 cp = tp+1; /* cp now points to volume, supposedly */
1457 cm_FsStrCpy(volumeName, lengthof(volumeName), cp);
1459 /* OK, now we have the cell and the volume */
1460 osi_Log2(afsd_logp, " Found cell [%s] and volume [%s]",
1461 osi_LogSaveFsString(afsd_logp, cellName),
1462 osi_LogSaveFsString(afsd_logp, volumeName));
1464 cellp = cm_GetCell(cellName, CM_FLAG_CREATE);
1465 if (cellp == NULL) {
1466 goto _exit_invalid_path;
1469 len = cm_FsStrLen(volumeName);
1470 if (len >= 8 && cm_FsStrCmp(volumeName + len - 7, ".backup") == 0)
1472 else if (len >= 10 &&
1473 cm_FsStrCmp(volumeName + len - 9, ".readonly") == 0)
1478 if (cm_VolNameIsID(volumeName)) {
1479 code = cm_FindVolumeByID(cellp, atoi(volumeName), userp, reqp,
1480 CM_GETVOL_FLAG_CREATE, &volp);
1482 code = cm_FindVolumeByName(cellp, volumeName, userp, reqp,
1483 CM_GETVOL_FLAG_CREATE, &volp);
1489 if (volType == BACKVOL)
1490 volume = volp->vol[BACKVOL].ID;
1491 else if (volType == ROVOL ||
1492 (volType == RWVOL && mountType == ROVOL && volp->vol[ROVOL].ID != 0))
1493 volume = volp->vol[ROVOL].ID;
1495 volume = volp->vol[RWVOL].ID;
1497 cm_SetFid(&fid, cellp->cellID, volume, 1, 1);
1499 code = cm_GetSCache(&fid, NULL, outScpp, userp, reqp);
1512 if (flags & CM_FLAG_CHECKPATH)
1513 return CM_ERROR_NOSUCHPATH;
1515 return CM_ERROR_NOSUCHFILE;
1518 #ifdef DEBUG_REFCOUNT
1519 long cm_LookupDbg(cm_scache_t *dscp, clientchar_t *namep, long flags, cm_user_t *userp,
1520 cm_req_t *reqp, cm_scache_t **outScpp, char * file, long line)
1522 long cm_Lookup(cm_scache_t *dscp, clientchar_t *namep, long flags, cm_user_t *userp,
1523 cm_req_t *reqp, cm_scache_t **outScpp)
1527 clientchar_t tname[AFSPATHMAX];
1528 int sysNameIndex = 0;
1529 cm_scache_t *scp = NULL;
1531 #ifdef DEBUG_REFCOUNT
1532 afsi_log("%s:%d cm_Lookup dscp 0x%p ref %d", file, line, dscp, dscp->refCount, file, line);
1533 osi_Log2(afsd_logp, "cm_Lookup dscp 0x%p ref %d", dscp, dscp->refCount);
1536 if ( cm_ClientStrCmpI(namep,_C(SMB_IOCTL_FILENAME_NOSLASH)) == 0 ) {
1537 if (flags & CM_FLAG_CHECKPATH)
1538 return CM_ERROR_NOSUCHPATH;
1540 return CM_ERROR_NOSUCHFILE;
1543 if (dscp == cm_data.rootSCachep &&
1544 cm_ClientStrCmpNI(namep, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH) == 0) {
1545 return cm_EvaluateVolumeReference(namep, flags, userp, reqp, outScpp);
1548 if (cm_ExpandSysName(reqp, namep, NULL, 0, 0) > 0) {
1549 for ( sysNameIndex = 0; sysNameIndex < MAXNUMSYSNAMES; sysNameIndex++) {
1550 code = cm_ExpandSysName(reqp, namep, tname, lengthof(tname), sysNameIndex);
1552 code = cm_LookupInternal(dscp, tname, flags, userp, reqp, &scp);
1553 #ifdef DEBUG_REFCOUNT
1554 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);
1555 osi_Log3(afsd_logp, "cm_LookupInternal (1) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1563 cm_ReleaseSCache(scp);
1567 code = cm_LookupInternal(dscp, namep, flags, userp, reqp, &scp);
1568 #ifdef DEBUG_REFCOUNT
1569 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);
1570 osi_Log3(afsd_logp, "cm_LookupInternal (2) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1577 code = cm_LookupInternal(dscp, namep, flags, userp, reqp, &scp);
1578 #ifdef DEBUG_REFCOUNT
1579 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);
1580 osi_Log3(afsd_logp, "cm_LookupInternal (2) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1586 /* None of the possible sysName expansions could be found */
1587 if (flags & CM_FLAG_CHECKPATH)
1588 return CM_ERROR_NOSUCHPATH;
1590 return CM_ERROR_NOSUCHFILE;
1593 /*! \brief Unlink a file name
1595 Encapsulates a call to RXAFS_RemoveFile().
1597 \param[in] dscp cm_scache_t pointing at the directory containing the
1598 name to be unlinked.
1600 \param[in] fnamep Original name to be unlinked. This is the
1601 name that will be passed into the RXAFS_RemoveFile() call.
1602 This parameter is optional. If not provided, the value will
1605 \param[in] came Client name to be unlinked. This name will be used
1606 to update the local directory caches.
1608 \param[in] userp cm_user_t for the request.
1610 \param[in] reqp Request tracker.
1613 long cm_Unlink(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t * cnamep,
1614 cm_user_t *userp, cm_req_t *reqp)
1620 AFSFetchStatus newDirStatus;
1622 struct rx_connection * rxconnp;
1624 cm_scache_t *scp = NULL;
1625 int free_fnamep = FALSE;
1628 memset(&volSync, 0, sizeof(volSync));
1630 if (fnamep == NULL) {
1633 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
1634 CM_DIROP_FLAG_NONE, &dirop);
1636 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
1639 cm_EndDirOp(&dirop);
1646 #ifdef AFS_FREELANCE_CLIENT
1647 if (cm_freelanceEnabled && dscp == cm_data.rootSCachep) {
1648 /* deleting a mount point from the root dir. */
1649 code = cm_FreelanceRemoveMount(fnamep);
1654 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
1658 /* Check for RO volume */
1659 if (dscp->flags & CM_SCACHEFLAG_RO) {
1660 code = CM_ERROR_READONLY;
1664 /* make sure we don't screw up the dir status during the merge */
1665 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE,
1666 CM_DIROP_FLAG_NONE, &dirop);
1668 lock_ObtainWrite(&dscp->rw);
1669 sflags = CM_SCACHESYNC_STOREDATA;
1670 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, sflags);
1671 lock_ReleaseWrite(&dscp->rw);
1673 cm_EndDirOp(&dirop);
1678 InterlockedIncrement(&dscp->activeRPCs);
1680 afsFid.Volume = dscp->fid.volume;
1681 afsFid.Vnode = dscp->fid.vnode;
1682 afsFid.Unique = dscp->fid.unique;
1684 osi_Log1(afsd_logp, "CALL RemoveFile scp 0x%p", dscp);
1686 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
1690 rxconnp = cm_GetRxConn(connp);
1691 code = RXAFS_RemoveFile(rxconnp, &afsFid, fnamep,
1692 &newDirStatus, &volSync);
1693 rx_PutConnection(rxconnp);
1695 } while (cm_Analyze(connp, userp, reqp, &dscp->fid, NULL, 1, &newDirStatus, &volSync, NULL, NULL, code));
1696 code = cm_MapRPCError(code, reqp);
1699 osi_Log1(afsd_logp, "CALL RemoveFile FAILURE, code 0x%x", code);
1701 osi_Log0(afsd_logp, "CALL RemoveFile SUCCESS");
1704 lock_ObtainWrite(&dirop.scp->dirlock);
1705 dirop.lockType = CM_DIRLOCK_WRITE;
1707 lock_ObtainWrite(&dscp->rw);
1708 cm_dnlcRemove(dscp, cnamep);
1710 code = cm_MergeStatus(NULL, dscp, &newDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
1712 if (cm_CheckDirOpForSingleChange(&dirop) && cnamep) {
1713 lock_ReleaseWrite(&dscp->rw);
1714 cm_DirDeleteEntry(&dirop, fnamep);
1716 cm_BPlusDirDeleteEntry(&dirop, cnamep);
1718 lock_ObtainWrite(&dscp->rw);
1721 InterlockedDecrement(&scp->activeRPCs);
1722 if (code == CM_ERROR_NOSUCHFILE) {
1723 /* windows would not have allowed the request to delete the file
1724 * if it did not believe the file existed. therefore, we must
1725 * have an inconsistent view of the world.
1727 dscp->cbServerp = NULL;
1731 cm_SyncOpDone(dscp, NULL, sflags);
1732 lock_ReleaseWrite(&dscp->rw);
1734 cm_EndDirOp(&dirop);
1736 if (invalidate && RDR_Initialized &&
1737 scp->fileType != CM_SCACHETYPE_FILE && scp->fileType != CM_SCACHETYPE_DIRECTORY)
1738 RDR_InvalidateObject(dscp->fid.cell, dscp->fid.volume, dscp->fid.vnode,
1739 dscp->fid.unique, dscp->fid.hash,
1740 dscp->fileType, AFS_INVALIDATE_DATA_VERSION);
1744 lock_ObtainWrite(&scp->rw);
1745 if (--scp->linkCount == 0) {
1746 scp->flags |= CM_SCACHEFLAG_DELETED;
1747 lock_ObtainWrite(&cm_scacheLock);
1748 cm_AdjustScacheLRU(scp);
1749 cm_RemoveSCacheFromHashTable(scp);
1750 lock_ReleaseWrite(&cm_scacheLock);
1752 cm_DiscardSCache(scp);
1753 lock_ReleaseWrite(&scp->rw);
1754 if (RDR_Initialized && !(reqp->flags & CM_REQ_SOURCE_REDIR))
1755 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode,
1756 scp->fid.unique, scp->fid.hash,
1757 scp->fileType, AFS_INVALIDATE_DELETED);
1759 cm_ReleaseSCache(scp);
1769 /* called with a write locked vnode, and fills in the link info.
1770 * returns this the vnode still write locked.
1772 long cm_HandleLink(cm_scache_t *linkScp, cm_user_t *userp, cm_req_t *reqp)
1776 lock_AssertWrite(&linkScp->rw);
1777 if (!linkScp->mountPointStringp[0] ||
1778 linkScp->mpDataVersion != linkScp->dataVersion) {
1780 #ifdef AFS_FREELANCE_CLIENT
1781 /* File servers do not have data for freelance entries */
1782 if (cm_freelanceEnabled &&
1783 linkScp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1784 linkScp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
1786 code = cm_FreelanceFetchMountPointString(linkScp);
1788 #endif /* AFS_FREELANCE_CLIENT */
1790 char temp[MOUNTPOINTLEN];
1793 /* read the link data from the file server */
1794 offset.LowPart = offset.HighPart = 0;
1795 code = cm_GetData(linkScp, &offset, temp, MOUNTPOINTLEN, userp, reqp);
1800 * linkScp->length is the actual length of the symlink target string.
1801 * It is current because cm_GetData merged the most up to date
1802 * status info into scp and has not dropped the rwlock since.
1804 if (linkScp->length.LowPart > MOUNTPOINTLEN - 1)
1805 return CM_ERROR_TOOBIG;
1806 if (linkScp->length.LowPart == 0)
1807 return CM_ERROR_INVAL;
1809 /* make sure we are NUL terminated */
1810 temp[linkScp->length.LowPart] = 0;
1811 memcpy(linkScp->mountPointStringp, temp, linkScp->length.LowPart + 1);
1812 linkScp->mpDataVersion = linkScp->dataVersion;
1815 if ( !strnicmp(linkScp->mountPointStringp, "msdfs:", strlen("msdfs:")) )
1816 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1818 } /* don't have symlink contents cached */
1823 /* called with a held vnode and a path suffix, with the held vnode being a
1824 * symbolic link. Our goal is to generate a new path to interpret, and return
1825 * this new path in newSpaceBufferp. If the new vnode is relative to a dir
1826 * other than the directory containing the symbolic link, then the new root is
1827 * returned in *newRootScpp, otherwise a null is returned there.
1829 long cm_AssembleLink(cm_scache_t *linkScp, fschar_t *pathSuffixp,
1830 cm_scache_t **newRootScpp, cm_space_t **newSpaceBufferp,
1831 cm_user_t *userp, cm_req_t *reqp)
1838 *newRootScpp = NULL;
1839 *newSpaceBufferp = NULL;
1841 lock_ObtainWrite(&linkScp->rw);
1843 * Do not get status if we do not already have a callback.
1844 * The process of reading the symlink string will obtain status information
1845 * in a single RPC. No reason to add a second round trip.
1847 * If we do have a callback, use cm_SyncOp to get status in case the
1848 * current cm_user_t is not the same as the one that obtained the
1849 * symlink string contents.
1851 if (cm_HaveCallback(linkScp)) {
1852 code = cm_SyncOp(linkScp, NULL, userp, reqp, 0,
1853 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
1855 lock_ReleaseWrite(&linkScp->rw);
1856 cm_ReleaseSCache(linkScp);
1859 cm_SyncOpDone(linkScp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
1861 code = cm_HandleLink(linkScp, userp, reqp);
1865 /* if we may overflow the buffer, bail out; buffer is signficantly
1866 * bigger than max path length, so we don't really have to worry about
1867 * being a little conservative here.
1869 if (cm_FsStrLen(linkScp->mountPointStringp) + cm_FsStrLen(pathSuffixp) + 2
1870 >= CM_UTILS_SPACESIZE) {
1871 code = CM_ERROR_TOOBIG;
1875 tsp = cm_GetSpace();
1876 linkp = linkScp->mountPointStringp;
1877 if (strncmp(linkp, cm_mountRoot, cm_mountRootLen) == 0) {
1878 if (strlen(linkp) > cm_mountRootLen)
1879 StringCbCopyA((char *) tsp->data, sizeof(tsp->data), linkp+cm_mountRootLen+1);
1882 *newRootScpp = cm_RootSCachep(userp, reqp);
1883 cm_HoldSCache(*newRootScpp);
1884 } else if (linkp[0] == '\\' && linkp[1] == '\\') {
1885 if (!strnicmp(&linkp[2], cm_NetbiosName, (len = (long)strlen(cm_NetbiosName))))
1887 char * p = &linkp[len + 3];
1888 if (strnicmp(p, "all", 3) == 0)
1891 StringCbCopyA(tsp->data, sizeof(tsp->data), p);
1892 for (p = tsp->data; *p; p++) {
1896 *newRootScpp = cm_RootSCachep(userp, reqp);
1897 cm_HoldSCache(*newRootScpp);
1899 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1900 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1901 code = CM_ERROR_PATH_NOT_COVERED;
1903 } else if ( linkScp->fileType == CM_SCACHETYPE_DFSLINK ||
1904 !strnicmp(linkp, "msdfs:", (len = (long)strlen("msdfs:"))) ) {
1905 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1906 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1907 code = CM_ERROR_PATH_NOT_COVERED;
1908 } else if (*linkp == '\\' || *linkp == '/') {
1910 /* formerly, this was considered to be from the AFS root,
1911 * but this seems to create problems. instead, we will just
1912 * reject the link */
1913 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp+1);
1914 *newRootScpp = cm_RootSCachep(userp, reqp);
1915 cm_HoldSCache(*newRootScpp);
1917 /* we still copy the link data into the response so that
1918 * the user can see what the link points to
1920 linkScp->fileType = CM_SCACHETYPE_INVALID;
1921 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1922 code = CM_ERROR_NOSUCHPATH;
1925 /* a relative link */
1926 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1928 if (pathSuffixp[0] != 0) { /* if suffix string is non-null */
1929 StringCchCatA(tsp->data,lengthof(tsp->data), "\\");
1930 StringCchCatA(tsp->data,lengthof(tsp->data), pathSuffixp);
1934 clientchar_t * cpath = cm_FsStringToClientStringAlloc(tsp->data, -1, NULL);
1935 if (cpath != NULL) {
1936 cm_ClientStrCpy(tsp->wdata, lengthof(tsp->wdata), cpath);
1938 *newSpaceBufferp = tsp;
1940 code = CM_ERROR_NOSUCHPATH;
1947 if (code == CM_ERROR_PATH_NOT_COVERED && reqp->tidPathp && reqp->relPathp) {
1948 cm_VolStatus_Notify_DFS_Mapping(linkScp, reqp->tidPathp, reqp->relPathp);
1953 lock_ReleaseWrite(&linkScp->rw);
1956 #ifdef DEBUG_REFCOUNT
1957 long cm_NameIDbg(cm_scache_t *rootSCachep, clientchar_t *pathp, long flags,
1958 cm_user_t *userp, clientchar_t *tidPathp, cm_req_t *reqp,
1959 cm_scache_t **outScpp,
1960 char * file, long line)
1962 long cm_NameI(cm_scache_t *rootSCachep, clientchar_t *pathp, long flags,
1963 cm_user_t *userp, clientchar_t *tidPathp,
1964 cm_req_t *reqp, cm_scache_t **outScpp)
1968 clientchar_t *tp; /* ptr moving through input buffer */
1969 clientchar_t tc; /* temp char */
1970 int haveComponent; /* has new component started? */
1971 clientchar_t component[AFSPATHMAX]; /* this is the new component */
1972 clientchar_t *cp; /* component name being assembled */
1973 cm_scache_t *tscp; /* current location in the hierarchy */
1974 cm_scache_t *nscp; /* next dude down */
1975 cm_scache_t *dirScp; /* last dir we searched */
1976 cm_scache_t *linkScp; /* new root for the symlink we just
1978 cm_space_t *psp; /* space for current path, if we've hit
1980 cm_space_t *tempsp; /* temp vbl */
1981 clientchar_t *restp; /* rest of the pathname to interpret */
1982 int symlinkCount; /* count of # of symlinks traversed */
1983 int extraFlag; /* avoid chasing mt pts for dir cmd */
1984 int phase = 1; /* 1 = tidPathp, 2 = pathp */
1985 cm_fid_t fids[MAX_FID_COUNT]; /* array of fids processed in this path walk */
1986 int fid_count = 0; /* number of fids processed in this path walk */
1991 #ifdef DEBUG_REFCOUNT
1992 afsi_log("%s:%d cm_NameI rootscp 0x%p ref %d", file, line, rootSCachep, rootSCachep->refCount);
1993 osi_Log4(afsd_logp,"cm_NameI rootscp 0x%p path %S tidpath %S flags 0x%x",
1994 rootSCachep, pathp ? pathp : L"<NULL>", tidPathp ? tidPathp : L"<NULL>",
2009 cm_HoldSCache(tscp);
2017 /* map Unix slashes into DOS ones so we can interpret Unix
2023 if (!haveComponent) {
2026 } else if (tc == 0) {
2040 /* we have a component here */
2041 if (tc == 0 || tc == '\\') {
2042 /* end of the component; we're at the last
2043 * component if tc == 0. However, if the last
2044 * is a symlink, we have more to do.
2046 *cp++ = 0; /* add null termination */
2049 if (tscp == cm_RootSCachep(userp, reqp)) {
2050 code = cm_Lookup(tscp, component, CM_FLAG_CHECKPATH, userp, reqp, &nscp);
2052 if ((code == CM_ERROR_NOSUCHPATH || code == CM_ERROR_NOSUCHFILE ||
2053 code == CM_ERROR_BPLUS_NOMATCH) &&
2054 tscp == cm_data.rootSCachep) {
2056 clientchar_t volref[AFSPATHMAX];
2058 if (wcschr(component, '%') != NULL || wcschr(component, '#') != NULL) {
2060 * A volume reference: <cell>{%,#}<volume> -> @vol:<cell>{%,#}<volume>
2062 cm_ClientStrCpyN(volref, AFSPATHMAX, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH);
2063 cm_ClientStrCat(volref, AFSPATHMAX, component);
2065 code = cm_EvaluateVolumeReference(volref, CM_FLAG_CHECKPATH, userp, reqp, &nscp);
2067 #ifdef AFS_FREELANCE_CLIENT
2068 else if (tscp->fid.cell == AFS_FAKE_ROOT_CELL_ID && tscp->fid.volume == AFS_FAKE_ROOT_VOL_ID &&
2069 tscp->fid.vnode == 1 && tscp->fid.unique == 1) {
2071 * If this is the Freelance volume root directory then treat unrecognized
2072 * names as cell names and attempt to find the appropriate "root.cell".
2074 cm_ClientStrCpyN(volref, AFSPATHMAX, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH);
2075 if (component[0] == L'.') {
2076 cm_ClientStrCat(volref, AFSPATHMAX, &component[1]);
2077 cm_ClientStrCatN(volref, AFSPATHMAX, L"%", sizeof(WCHAR));
2079 cm_ClientStrCat(volref, AFSPATHMAX, component);
2080 cm_ClientStrCatN(volref, AFSPATHMAX, L"#", sizeof(WCHAR));
2082 cm_ClientStrCatN(volref, AFSPATHMAX, L"root.cell", 9 * sizeof(WCHAR));
2084 code = cm_EvaluateVolumeReference(volref, CM_FLAG_CHECKPATH, userp, reqp, &nscp);
2089 if ((flags & CM_FLAG_DIRSEARCH) && tc == 0)
2090 extraFlag = CM_FLAG_NOMOUNTCHASE;
2091 code = cm_Lookup(tscp, component,
2093 userp, reqp, &nscp);
2096 if (!cm_ClientStrCmp(component,_C("..")) ||
2097 !cm_ClientStrCmp(component,_C("."))) {
2099 * roll back the fid list until we find the
2100 * fid that matches where we are now. Its not
2101 * necessarily one or two fids because they
2102 * might have been symlinks or mount points or
2103 * both that were crossed.
2105 for ( i=fid_count-1; i>=0; i--) {
2106 if (!cm_FidCmp(&nscp->fid, &fids[i]))
2111 /* add the new fid to the list */
2112 if (fid_count == MAX_FID_COUNT) {
2113 code = CM_ERROR_TOO_MANY_SYMLINKS;
2114 cm_ReleaseSCache(nscp);
2118 fids[fid_count++] = nscp->fid;
2123 cm_ReleaseSCache(tscp);
2125 cm_ReleaseSCache(dirScp);
2128 if ((code == CM_ERROR_NOSUCHFILE || code == CM_ERROR_BPLUS_NOMATCH) &&
2129 tscp->fileType == CM_SCACHETYPE_SYMLINK) {
2130 osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_NOSUCHPATH");
2131 return CM_ERROR_NOSUCHPATH;
2133 osi_Log1(afsd_logp,"cm_NameI code 0x%x", code);
2138 haveComponent = 0; /* component done */
2140 cm_ReleaseSCache(dirScp);
2141 dirScp = tscp; /* for some symlinks */
2142 tscp = nscp; /* already held */
2144 if (tc == 0 && !(flags & CM_FLAG_FOLLOW) && phase == 2) {
2147 cm_ReleaseSCache(dirScp);
2153 /* now, if tscp is a symlink, we should follow it and
2154 * assemble the path again.
2156 lock_ObtainWrite(&tscp->rw);
2157 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
2158 CM_SCACHESYNC_GETSTATUS
2159 | CM_SCACHESYNC_NEEDCALLBACK);
2161 lock_ReleaseWrite(&tscp->rw);
2162 cm_ReleaseSCache(tscp);
2165 cm_ReleaseSCache(dirScp);
2170 cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2172 if (tscp->fileType == CM_SCACHETYPE_SYMLINK) {
2173 /* this is a symlink; assemble a new buffer */
2174 lock_ReleaseWrite(&tscp->rw);
2175 if (symlinkCount++ >= MAX_SYMLINK_COUNT) {
2176 cm_ReleaseSCache(tscp);
2179 cm_ReleaseSCache(dirScp);
2184 osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_TOO_MANY_SYMLINKS");
2185 return CM_ERROR_TOO_MANY_SYMLINKS;
2195 /* TODO: make this better */
2196 frestp = cm_ClientStringToFsStringAlloc(restp, -1, NULL);
2197 code = cm_AssembleLink(tscp, frestp, &linkScp, &tempsp, userp, reqp);
2201 if (code == 0 && linkScp != NULL) {
2202 if (linkScp == cm_data.rootSCachep) {
2206 for ( i=0; i<fid_count; i++) {
2207 if ( !cm_FidCmp(&linkScp->fid, &fids[i]) ) {
2208 code = CM_ERROR_TOO_MANY_SYMLINKS;
2209 cm_ReleaseSCache(linkScp);
2215 if (i == fid_count && fid_count < MAX_FID_COUNT) {
2216 fids[fid_count++] = linkScp->fid;
2221 /* something went wrong */
2222 cm_ReleaseSCache(tscp);
2225 cm_ReleaseSCache(dirScp);
2231 /* otherwise, tempsp has the new path,
2232 * and linkScp is the new root from
2233 * which to interpret that path.
2234 * Continue with the namei processing,
2235 * also doing the bookkeeping for the
2236 * space allocation and tracking the
2237 * vnode reference counts.
2243 cm_ReleaseSCache(tscp);
2248 * now, if linkScp is null, that's
2249 * AssembleLink's way of telling us that
2250 * the sym link is relative to the dir
2251 * containing the link. We have a ref
2252 * to it in dirScp, and we hold it now
2253 * and reuse it as the new spot in the
2261 /* not a symlink, we may be done */
2262 lock_ReleaseWrite(&tscp->rw);
2270 cm_ReleaseSCache(dirScp);
2278 cm_ReleaseSCache(dirScp);
2281 } /* end of a component */
2284 } /* we have a component */
2285 } /* big while loop over all components */
2289 cm_ReleaseSCache(dirScp);
2295 cm_ReleaseSCache(tscp);
2297 #ifdef DEBUG_REFCOUNT
2298 afsi_log("%s:%d cm_NameI code 0x%x outScpp 0x%p ref %d", file, line, code, *outScpp, (*outScpp) ? (*outScpp)->refCount : 0);
2300 osi_Log2(afsd_logp,"cm_NameI code 0x%x outScpp 0x%p", code, *outScpp);
2304 /* called with a dir, and a vnode within the dir that happens to be a symlink.
2305 * We chase the link, and return a held pointer to the target, if it exists,
2306 * in *outScpp. If we succeed, we return 0, otherwise we return an error code
2307 * and do not hold or return a target vnode.
2309 * This is very similar to calling cm_NameI with the last component of a name,
2310 * which happens to be a symlink, except that we've already passed by the name.
2312 * This function is typically called by the directory listing functions, which
2313 * encounter symlinks but need to return the proper file length so programs
2314 * like "more" work properly when they make use of the attributes retrieved from
2317 * The input vnode should not be locked when this function is called.
2319 long cm_EvaluateSymLink(cm_scache_t *dscp, cm_scache_t *linkScp,
2320 cm_scache_t **outScpp, cm_user_t *userp, cm_req_t *reqp)
2324 cm_scache_t *newRootScp;
2328 osi_Log1(afsd_logp, "Evaluating symlink scp 0x%p", linkScp);
2330 code = cm_AssembleLink(linkScp, "", &newRootScp, &spacep, userp, reqp);
2334 /* now, if newRootScp is NULL, we're really being told that the symlink
2335 * is relative to the current directory (dscp).
2337 if (newRootScp == NULL) {
2339 cm_HoldSCache(dscp);
2342 code = cm_NameI(newRootScp, spacep->wdata,
2343 CM_FLAG_CASEFOLD | CM_FLAG_FOLLOW | CM_FLAG_DIRSEARCH,
2344 userp, NULL, reqp, outScpp);
2346 if (code == CM_ERROR_NOSUCHFILE || code == CM_ERROR_BPLUS_NOMATCH)
2347 code = CM_ERROR_NOSUCHPATH;
2349 /* this stuff is allocated no matter what happened on the namei call,
2351 cm_FreeSpace(spacep);
2352 cm_ReleaseSCache(newRootScp);
2354 if (linkScp == *outScpp) {
2355 cm_ReleaseSCache(*outScpp);
2357 code = CM_ERROR_NOSUCHPATH;
2363 /* for a given entry, make sure that it isn't in the stat cache, and then
2364 * add it to the list of file IDs to be obtained.
2366 * Don't bother adding it if we already have a vnode. Note that the dir
2367 * is locked, so we have to be careful checking the vnode we're thinking of
2368 * processing, to avoid deadlocks.
2370 long cm_TryBulkProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
2381 /* Don't overflow bsp. */
2382 if (bsp->counter >= CM_BULKMAX)
2383 return CM_ERROR_STOPNOW;
2385 thyper.LowPart = cm_data.buf_blockSize;
2386 thyper.HighPart = 0;
2387 thyper = LargeIntegerAdd(thyper, bsp->bufOffset);
2389 /* thyper is now the first byte past the end of the record we're
2390 * interested in, and bsp->bufOffset is the first byte of the record
2391 * we're interested in.
2392 * Skip data in the others.
2395 if (LargeIntegerLessThan(*offp, bsp->bufOffset))
2397 if (LargeIntegerGreaterThanOrEqualTo(*offp, thyper))
2398 return CM_ERROR_STOPNOW;
2399 if (strcmp(dep->name, ".") == 0 || strcmp(dep->name, "..") == 0)
2402 cm_SetFid(&tfid, scp->fid.cell, scp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
2403 tscp = cm_FindSCache(&tfid);
2405 if (lock_TryWrite(&tscp->rw)) {
2406 /* we have an entry that we can look at */
2407 if (!cm_EAccesFindEntry(bsp->userp, &tscp->fid) && cm_HaveCallback(tscp)) {
2408 /* we have a callback on it. Don't bother
2409 * fetching this stat entry, since we're happy
2410 * with the info we have.
2412 lock_ReleaseWrite(&tscp->rw);
2413 cm_ReleaseSCache(tscp);
2416 lock_ReleaseWrite(&tscp->rw);
2418 cm_ReleaseSCache(tscp);
2421 #ifdef AFS_FREELANCE_CLIENT
2422 // yj: if this is a mountpoint under root.afs then we don't want it
2423 // to be bulkstat-ed, instead, we call getSCache directly and under
2424 // getSCache, it is handled specially.
2425 if ( cm_freelanceEnabled &&
2426 tfid.cell==AFS_FAKE_ROOT_CELL_ID &&
2427 tfid.volume==AFS_FAKE_ROOT_VOL_ID &&
2428 !(tfid.vnode==0x1 && tfid.unique==0x1) )
2430 osi_Log0(afsd_logp, "cm_TryBulkProc Freelance calls cm_SCache on root.afs mountpoint");
2431 return cm_GetSCache(&tfid, NULL, &tscp, NULL, NULL);
2433 #endif /* AFS_FREELANCE_CLIENT */
2436 bsp->fids[i].Volume = scp->fid.volume;
2437 bsp->fids[i].Vnode = tfid.vnode;
2438 bsp->fids[i].Unique = tfid.unique;
2443 cm_TryBulkStatRPC(cm_scache_t *dscp, cm_bulkStat_t *bbp, cm_user_t *userp, cm_req_t *reqp)
2446 AFSCBFids fidStruct;
2447 AFSBulkStats statStruct;
2449 AFSCBs callbackStruct;
2452 cm_callbackRequest_t cbReq;
2459 struct rx_connection * rxconnp;
2460 int inlinebulk; /* Did we use InlineBulkStatus RPC or not? */
2462 memset(&volSync, 0, sizeof(volSync));
2464 /* otherwise, we may have one or more bulk stat's worth of stuff in bb;
2465 * make the calls to create the entries. Handle AFSCBMAX files at a
2468 for (filex = 0; filex < bbp->counter; filex += filesThisCall) {
2469 filesThisCall = bbp->counter - filex;
2470 if (filesThisCall > AFSCBMAX)
2471 filesThisCall = AFSCBMAX;
2473 fidStruct.AFSCBFids_len = filesThisCall;
2474 fidStruct.AFSCBFids_val = &bbp->fids[filex];
2475 statStruct.AFSBulkStats_len = filesThisCall;
2476 statStruct.AFSBulkStats_val = &bbp->stats[filex];
2477 callbackStruct.AFSCBs_len = filesThisCall;
2478 callbackStruct.AFSCBs_val = &bbp->callbacks[filex];
2479 cm_StartCallbackGrantingCall(NULL, &cbReq);
2480 osi_Log1(afsd_logp, "CALL BulkStatus, %d entries", filesThisCall);
2483 * Whenever cm_Analyze is called for a RXAFS_ RPC there must
2484 * be a FID provided. However, the error code from RXAFS_BulkStatus
2485 * or RXAFS_InlinkBulkStatus does not apply to any FID. Therefore,
2486 * we generate an invalid FID to match with the RPC error.
2488 cm_SetFid(&tfid, dscp->fid.cell, dscp->fid.volume, 0, 0);
2493 code = cm_ConnFromFID(&tfid, userp, reqp, &connp);
2497 rxconnp = cm_GetRxConn(connp);
2498 if (SERVERHASINLINEBULK(connp)) {
2499 code = RXAFS_InlineBulkStatus(rxconnp, &fidStruct,
2500 &statStruct, &callbackStruct, &volSync);
2501 if (code == RXGEN_OPCODE) {
2502 SET_SERVERHASNOINLINEBULK(connp);
2508 code = RXAFS_BulkStatus(rxconnp, &fidStruct,
2509 &statStruct, &callbackStruct, &volSync);
2511 rx_PutConnection(rxconnp);
2514 * If InlineBulk RPC was called and it succeeded,
2515 * then pull out the return code from the status info
2516 * and use it for cm_Analyze so that we can failover to other
2517 * .readonly volume instances. But only do it for errors that
2518 * are volume global.
2520 if (inlinebulk && code == 0 && (&bbp->stats[0])->errorCode) {
2521 osi_Log1(afsd_logp, "cm_TryBulkStat inline-bulk stat error: %d",
2522 (&bbp->stats[0])->errorCode);
2523 switch ((&bbp->stats[0])->errorCode) {
2532 code = (&bbp->stats[0])->errorCode;
2535 /* Rx and Rxkad errors are volume global */
2536 if ( (&bbp->stats[0])->errorCode >= -64 && (&bbp->stats[0])->errorCode < 0 ||
2537 (&bbp->stats[0])->errorCode >= ERROR_TABLE_BASE_RXK && (&bbp->stats[0])->errorCode < ERROR_TABLE_BASE_RXK + 256)
2538 code = (&bbp->stats[0])->errorCode;
2541 } while (cm_Analyze(connp, userp, reqp, &tfid, NULL, 0, &bbp->stats[0], &volSync, NULL, &cbReq, code));
2542 code = cm_MapRPCError(code, reqp);
2545 * might as well quit on an error, since we're not going to do
2546 * much better on the next immediate call, either.
2549 osi_Log2(afsd_logp, "CALL %sBulkStatus FAILURE code 0x%x",
2550 inlinebulk ? "Inline" : "", code);
2551 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2556 * The bulk RPC has succeeded or at least not failed with a
2557 * volume global error result. For items that have inlineBulk
2558 * errors we must call cm_Analyze in order to perform required
2559 * logging of errors.
2561 * If the RPC was not inline bulk or the entry either has no error
2562 * the status must be merged.
2564 osi_Log1(afsd_logp, "CALL %sBulkStatus SUCCESS", inlinebulk ? "Inline" : "");
2566 for (i = 0; i<filesThisCall; i++) {
2568 cm_SetFid(&tfid, dscp->fid.cell, bbp->fids[j].Volume, bbp->fids[j].Vnode, bbp->fids[j].Unique);
2570 if (inlinebulk && (&bbp->stats[j])->errorCode) {
2571 cm_req_t treq = *reqp;
2572 cm_Analyze(NULL, userp, &treq, &tfid, NULL, 0, &bbp->stats[j], &volSync,
2573 NULL, &cbReq, (&bbp->stats[j])->errorCode);
2574 switch ((&bbp->stats[j])->errorCode) {
2579 cm_EAccesAddEntry(userp, &tfid, &dscp->fid);
2582 code = cm_GetSCache(&tfid, &dscp->fid, &scp, userp, reqp);
2587 * otherwise, if this entry has no callback info,
2588 * merge in this. If there is existing callback info
2589 * we skip the merge because the existing data must be
2590 * current (we have a callback) and the response from
2591 * a non-inline bulk rpc might actually be wrong.
2593 * now, we have to be extra paranoid on merging in this
2594 * information, since we didn't use cm_SyncOp before
2595 * starting the fetch to make sure that no bad races
2596 * were occurring. Specifically, we need to make sure
2597 * we don't obliterate any newer information in the
2598 * vnode than have here.
2600 * Right now, be pretty conservative: if there's a
2601 * callback or a pending call, skip it.
2602 * However, if the prior attempt to obtain status
2603 * was refused access or the volume is .readonly,
2604 * take the data in any case since we have nothing
2605 * better for the in flight directory enumeration that
2606 * resulted in this function being called.
2608 lock_ObtainRead(&scp->rw);
2609 if ((scp->cbServerp == NULL &&
2610 !(scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESTORING))) ||
2611 (scp->flags & CM_SCACHEFLAG_PURERO) ||
2612 cm_EAccesFindEntry(userp, &scp->fid))
2614 lock_ConvertRToW(&scp->rw);
2615 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
2618 CM_CALLBACK_MAINTAINCOUNT|CM_CALLBACK_BULKSTAT);
2619 InterlockedIncrement(&scp->activeRPCs);
2621 code = cm_MergeStatus(dscp, scp, &bbp->stats[j], &volSync, userp, reqp, CM_MERGEFLAG_BULKSTAT);
2622 lock_ReleaseWrite(&scp->rw);
2624 lock_ReleaseRead(&scp->rw);
2626 cm_ReleaseSCache(scp);
2628 } /* all files in the response */
2629 /* now tell it to drop the count,
2630 * after doing the vnode processing above */
2631 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2632 } /* while there are still more files to process */
2637 /* called with a write locked scp and a pointer to a buffer. Make bulk stat
2638 * calls on all undeleted files in the page of the directory specified.
2641 cm_TryBulkStat(cm_scache_t *dscp, osi_hyper_t *offsetp, cm_user_t *userp,
2647 osi_Log1(afsd_logp, "cm_TryBulkStat dir 0x%p", dscp);
2649 /* should be on a buffer boundary */
2650 osi_assertx((offsetp->LowPart & (cm_data.buf_blockSize - 1)) == 0, "invalid offset");
2652 bbp = malloc(sizeof(cm_bulkStat_t));
2653 memset(bbp, 0, sizeof(cm_bulkStat_t));
2655 bbp->bufOffset = *offsetp;
2657 lock_ReleaseWrite(&dscp->rw);
2658 /* first, assemble the file IDs we need to stat */
2659 code = cm_ApplyDir(dscp, cm_TryBulkProc, (void *) bbp, offsetp, userp, reqp, NULL);
2661 /* if we failed, bail out early */
2662 if (code && code != CM_ERROR_STOPNOW) {
2664 lock_ObtainWrite(&dscp->rw);
2668 code = cm_TryBulkStatRPC(dscp, bbp, userp, reqp);
2669 osi_Log1(afsd_logp, "END cm_TryBulkStat code 0x%x", code);
2671 lock_ObtainWrite(&dscp->rw);
2676 void cm_StatusFromAttr(AFSStoreStatus *statusp, cm_scache_t *scp, cm_attr_t *attrp)
2680 /* initialize store back mask as inexpensive local variable */
2682 memset(statusp, 0, sizeof(AFSStoreStatus));
2684 /* copy out queued info from scache first, if scp passed in */
2686 if (scp->mask & CM_SCACHEMASK_CLIENTMODTIME) {
2687 statusp->ClientModTime = scp->clientModTime;
2688 mask |= AFS_SETMODTIME;
2689 scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
2694 /* now add in our locally generated request */
2695 if (attrp->mask & CM_ATTRMASK_CLIENTMODTIME) {
2696 statusp->ClientModTime = attrp->clientModTime;
2697 mask |= AFS_SETMODTIME;
2699 if (attrp->mask & CM_ATTRMASK_UNIXMODEBITS) {
2700 statusp->UnixModeBits = attrp->unixModeBits;
2701 mask |= AFS_SETMODE;
2703 if (attrp->mask & CM_ATTRMASK_OWNER) {
2704 statusp->Owner = attrp->owner;
2705 mask |= AFS_SETOWNER;
2707 if (attrp->mask & CM_ATTRMASK_GROUP) {
2708 statusp->Group = attrp->group;
2709 mask |= AFS_SETGROUP;
2712 statusp->Mask = mask;
2716 cm_IsSpaceAvailable(cm_fid_t * fidp, osi_hyper_t *sizep, cm_user_t *userp, cm_req_t *reqp)
2721 struct rx_connection * rxconnp;
2722 AFSFetchVolumeStatus volStat;
2723 cm_volume_t *volp = NULL;
2728 char volName[32]="(unknown)";
2729 char offLineMsg[256]="server temporarily inaccessible";
2730 char motd[256]="server temporarily inaccessible";
2731 osi_hyper_t freespace;
2735 if (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
2736 fidp->volume==AFS_FAKE_ROOT_VOL_ID)
2741 volp = cm_GetVolumeByFID(fidp);
2746 volType = cm_VolumeType(volp, fidp->volume);
2747 if (volType == ROVOL || volType == BACKVOL) {
2752 cm_SetFid(&vfid, fidp->cell, fidp->volume, 1, 1);
2753 code = cm_GetSCache(&vfid, NULL, &vscp, userp, reqp);
2755 lock_ObtainWrite(&vscp->rw);
2756 code = cm_SyncOp(vscp, NULL, userp, reqp, PRSFS_READ,
2757 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2758 lock_ReleaseWrite(&vscp->rw);
2761 OfflineMsg = offLineMsg;
2765 code = cm_ConnFromFID(&vfid, userp, reqp, &connp);
2768 rxconnp = cm_GetRxConn(connp);
2769 code = RXAFS_GetVolumeStatus(rxconnp, fidp->volume,
2770 &volStat, &Name, &OfflineMsg, &MOTD);
2771 rx_PutConnection(rxconnp);
2773 } while (cm_Analyze(connp, userp, reqp, &vfid, NULL, 0, NULL, NULL, NULL, NULL, code));
2774 code = cm_MapRPCError(code, reqp);
2777 lock_ObtainWrite(&vscp->rw);
2778 cm_SyncOpDone(vscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2779 lock_ReleaseWrite(&vscp->rw);
2780 cm_ReleaseSCache(vscp);
2784 if (volStat.MaxQuota) {
2785 freespace.QuadPart = 1024 * (afs_int64)min(volStat.MaxQuota - volStat.BlocksInUse, volStat.PartBlocksAvail);
2787 freespace.QuadPart = 1024 * (afs_int64)volStat.PartBlocksAvail;
2789 spaceAvail = LargeIntegerGreaterThanOrEqualTo(freespace, *sizep);
2791 /* the rpc failed, assume there is space and we can fail it later. */
2800 /* set the file size, and make sure that all relevant buffers have been
2801 * truncated. Ensure that any partially truncated buffers have been zeroed
2802 * to the end of the buffer.
2804 long cm_SetLength(cm_scache_t *scp, osi_hyper_t *sizep, cm_user_t *userp,
2810 /* start by locking out buffer creation */
2811 lock_ObtainWrite(&scp->bufCreateLock);
2813 /* verify that this is a file, not a dir or a symlink */
2814 lock_ObtainWrite(&scp->rw);
2815 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
2816 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2819 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2821 if (scp->fileType != CM_SCACHETYPE_FILE) {
2822 code = CM_ERROR_ISDIR;
2827 if (LargeIntegerLessThan(*sizep, scp->length))
2832 lock_ReleaseWrite(&scp->rw);
2834 /* can't hold scp->rw lock here, since we may wait for a storeback to
2835 * finish if the buffer package is cleaning a buffer by storing it to
2839 buf_Truncate(scp, userp, reqp, sizep);
2841 /* now ensure that file length is short enough, and update truncPos */
2842 lock_ObtainWrite(&scp->rw);
2844 /* make sure we have a callback (so we have the right value for the
2845 * length), and wait for it to be safe to do a truncate.
2847 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_WRITE,
2848 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2849 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2851 /* If we only have 'i' bits, then we should still be able to set
2852 the size of a file we created. */
2853 if (code == CM_ERROR_NOACCESS && scp->creator == userp) {
2854 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
2855 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2856 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2862 if (LargeIntegerLessThan(*sizep, scp->length)) {
2863 /* a real truncation. If truncPos is not set yet, or is bigger
2864 * than where we're truncating the file, set truncPos to this
2869 if (!(scp->mask & CM_SCACHEMASK_TRUNCPOS)
2870 || LargeIntegerLessThan(*sizep, scp->length)) {
2872 scp->truncPos = *sizep;
2873 scp->mask |= CM_SCACHEMASK_TRUNCPOS;
2875 /* in either case, the new file size has been changed */
2876 scp->length = *sizep;
2877 scp->mask |= CM_SCACHEMASK_LENGTH;
2879 else if (LargeIntegerGreaterThan(*sizep, scp->length)) {
2880 /* really extending the file */
2881 /* Check to see if we have sufficient quota */
2882 if (cm_IsSpaceAvailable(&scp->fid, sizep, userp, reqp)) {
2883 scp->length = *sizep;
2884 scp->mask |= CM_SCACHEMASK_LENGTH;
2886 code = CM_ERROR_SPACE;
2891 /* done successfully */
2895 cm_SyncOpDone(scp, NULL,
2896 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2897 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2900 lock_ReleaseWrite(&scp->rw);
2901 lock_ReleaseWrite(&scp->bufCreateLock);
2906 /* set the file size or other attributes (but not both at once) */
2907 long cm_SetAttr(cm_scache_t *scp, cm_attr_t *attrp, cm_user_t *userp,
2911 AFSFetchStatus afsOutStatus;
2915 AFSStoreStatus afsInStatus;
2916 struct rx_connection * rxconnp;
2918 memset(&volSync, 0, sizeof(volSync));
2920 /* handle file length setting */
2921 if (attrp->mask & CM_ATTRMASK_LENGTH)
2922 return cm_SetLength(scp, &attrp->length, userp, reqp);
2924 lock_ObtainWrite(&scp->rw);
2925 /* Check for RO volume */
2926 if (scp->flags & CM_SCACHEFLAG_RO) {
2927 code = CM_ERROR_READONLY;
2928 lock_ReleaseWrite(&scp->rw);
2932 /* otherwise, we have to make an RPC to get the status */
2933 code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STORESTATUS);
2935 lock_ReleaseWrite(&scp->rw);
2938 lock_ConvertWToR(&scp->rw);
2940 /* make the attr structure */
2941 cm_StatusFromAttr(&afsInStatus, scp, attrp);
2943 tfid.Volume = scp->fid.volume;
2944 tfid.Vnode = scp->fid.vnode;
2945 tfid.Unique = scp->fid.unique;
2946 lock_ReleaseRead(&scp->rw);
2948 /* now make the RPC */
2949 InterlockedIncrement(&scp->activeRPCs);
2951 osi_Log1(afsd_logp, "CALL StoreStatus scp 0x%p", scp);
2953 code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
2957 rxconnp = cm_GetRxConn(connp);
2958 code = RXAFS_StoreStatus(rxconnp, &tfid,
2959 &afsInStatus, &afsOutStatus, &volSync);
2960 rx_PutConnection(rxconnp);
2962 } while (cm_Analyze(connp, userp, reqp,
2963 &scp->fid, NULL, 1, &afsOutStatus, &volSync, NULL, NULL, code));
2964 code = cm_MapRPCError(code, reqp);
2967 osi_Log1(afsd_logp, "CALL StoreStatus FAILURE, code 0x%x", code);
2969 osi_Log0(afsd_logp, "CALL StoreStatus SUCCESS");
2971 lock_ObtainWrite(&scp->rw);
2973 code = cm_MergeStatus( NULL, scp, &afsOutStatus, &volSync, userp, reqp,
2974 CM_MERGEFLAG_FORCE|CM_MERGEFLAG_STOREDATA);
2976 InterlockedDecrement(&scp->activeRPCs);
2977 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STORESTATUS);
2979 /* if we're changing the mode bits, discard the ACL cache,
2980 * since we changed the mode bits.
2982 if (afsInStatus.Mask & AFS_SETMODE)
2983 cm_FreeAllACLEnts(scp);
2984 lock_ReleaseWrite(&scp->rw);
2988 long cm_Create(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
2989 cm_scache_t **scpp, cm_user_t *userp, cm_req_t *reqp)
2994 cm_callbackRequest_t cbReq;
2997 cm_scache_t *scp = NULL;
3000 AFSStoreStatus inStatus;
3001 AFSFetchStatus updatedDirStatus;
3002 AFSFetchStatus newFileStatus;
3003 AFSCallBack newFileCallback;
3005 struct rx_connection * rxconnp;
3007 fschar_t * fnamep = NULL;
3009 memset(&volSync, 0, sizeof(volSync));
3011 /* can't create names with @sys in them; must expand it manually first.
3012 * return "invalid request" if they try.
3014 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
3015 return CM_ERROR_ATSYS;
3018 #ifdef AFS_FREELANCE_CLIENT
3019 /* Freelance root volume does not hold files */
3020 if (cm_freelanceEnabled &&
3021 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
3022 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
3024 return CM_ERROR_NOACCESS;
3026 #endif /* AFS_FREELANCE_CLIENT */
3028 /* Check for RO volume */
3029 if (dscp->flags & CM_SCACHEFLAG_RO)
3030 return CM_ERROR_READONLY;
3032 /* before starting the RPC, mark that we're changing the file data, so
3033 * that someone who does a chmod will know to wait until our call
3036 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3038 lock_ObtainWrite(&dscp->rw);
3039 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3040 lock_ReleaseWrite(&dscp->rw);
3042 cm_StartCallbackGrantingCall(NULL, &cbReq);
3044 cm_EndDirOp(&dirop);
3051 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3053 cm_StatusFromAttr(&inStatus, NULL, attrp);
3055 /* try the RPC now */
3056 InterlockedIncrement(&dscp->activeRPCs);
3057 osi_Log1(afsd_logp, "CALL CreateFile scp 0x%p", dscp);
3059 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3063 dirAFSFid.Volume = dscp->fid.volume;
3064 dirAFSFid.Vnode = dscp->fid.vnode;
3065 dirAFSFid.Unique = dscp->fid.unique;
3067 rxconnp = cm_GetRxConn(connp);
3068 code = RXAFS_CreateFile(connp->rxconnp, &dirAFSFid, fnamep,
3069 &inStatus, &newAFSFid, &newFileStatus,
3070 &updatedDirStatus, &newFileCallback,
3072 rx_PutConnection(rxconnp);
3074 } while (cm_Analyze(connp, userp, reqp,
3075 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, &cbReq, code));
3076 code = cm_MapRPCError(code, reqp);
3079 osi_Log1(afsd_logp, "CALL CreateFile FAILURE, code 0x%x", code);
3081 osi_Log0(afsd_logp, "CALL CreateFile SUCCESS");
3084 lock_ObtainWrite(&dirop.scp->dirlock);
3085 dirop.lockType = CM_DIRLOCK_WRITE;
3087 lock_ObtainWrite(&dscp->rw);
3089 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3090 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3091 if (cm_CheckDirOpForSingleChange(&dirop)) {
3092 lock_ReleaseWrite(&dscp->rw);
3093 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3095 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3097 lock_ObtainWrite(&dscp->rw);
3100 InterlockedDecrement(&dscp->activeRPCs);
3102 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3103 lock_ReleaseWrite(&dscp->rw);
3105 /* now try to create the file's entry, too, but be careful to
3106 * make sure that we don't merge in old info. Since we weren't locking
3107 * out any requests during the file's creation, we may have pretty old
3111 code = cm_GetSCache(&newFid, &dscp->fid, &scp, userp, reqp);
3113 lock_ObtainWrite(&scp->rw);
3114 scp->creator = userp; /* remember who created it */
3115 if (!cm_HaveCallback(scp)) {
3116 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
3117 &newFileCallback, &volSync, 0);
3118 InterlockedIncrement(&scp->activeRPCs);
3120 code = cm_MergeStatus( dscp, scp, &newFileStatus, &volSync,
3124 lock_ReleaseWrite(&scp->rw);
3128 /* make sure we end things properly */
3130 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
3132 cm_EndDirOp(&dirop);
3141 cm_ReleaseSCache(scp);
3147 * locked if TRUE means write-locked
3148 * else the cm_scache_t rw must not be held
3150 long cm_FSync(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp, afs_uint32 locked)
3155 lock_ReleaseWrite(&scp->rw);
3157 osi_Log2(afsd_logp, "cm_FSync scp 0x%p userp 0x%p", scp, userp);
3159 code = buf_CleanVnode(scp, userp, reqp);
3161 lock_ObtainWrite(&scp->rw);
3163 if (scp->mask & (CM_SCACHEMASK_TRUNCPOS
3164 | CM_SCACHEMASK_CLIENTMODTIME
3165 | CM_SCACHEMASK_LENGTH))
3166 code = cm_StoreMini(scp, userp, reqp);
3168 if (scp->flags & (CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE)) {
3169 code = (scp->flags & CM_SCACHEFLAG_OVERQUOTA) ? CM_ERROR_QUOTA : CM_ERROR_SPACE;
3170 scp->flags &= ~(CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE);
3174 lock_ReleaseWrite(&scp->rw);
3175 } else if (locked) {
3176 lock_ObtainWrite(&scp->rw);
3181 long cm_MakeDir(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
3182 cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3187 cm_callbackRequest_t cbReq;
3190 cm_scache_t *scp = NULL;
3193 AFSStoreStatus inStatus;
3194 AFSFetchStatus updatedDirStatus;
3195 AFSFetchStatus newDirStatus;
3196 AFSCallBack newDirCallback;
3198 struct rx_connection * rxconnp;
3200 fschar_t * fnamep = NULL;
3202 memset(&volSync, 0, sizeof(volSync));
3204 /* can't create names with @sys in them; must expand it manually first.
3205 * return "invalid request" if they try.
3207 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
3208 return CM_ERROR_ATSYS;
3211 #ifdef AFS_FREELANCE_CLIENT
3212 /* Freelance root volume does not hold subdirectories */
3213 if (cm_freelanceEnabled &&
3214 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
3215 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
3217 return CM_ERROR_NOACCESS;
3219 #endif /* AFS_FREELANCE_CLIENT */
3221 /* Check for RO volume */
3222 if (dscp->flags & CM_SCACHEFLAG_RO)
3223 return CM_ERROR_READONLY;
3225 /* before starting the RPC, mark that we're changing the directory
3226 * data, so that someone who does a chmod on the dir will wait until
3227 * our call completes.
3229 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3231 lock_ObtainWrite(&dscp->rw);
3232 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3233 lock_ReleaseWrite(&dscp->rw);
3235 cm_StartCallbackGrantingCall(NULL, &cbReq);
3237 cm_EndDirOp(&dirop);
3244 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3245 cm_StatusFromAttr(&inStatus, NULL, attrp);
3247 /* try the RPC now */
3248 InterlockedIncrement(&dscp->activeRPCs);
3249 osi_Log1(afsd_logp, "CALL MakeDir scp 0x%p", dscp);
3251 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3255 dirAFSFid.Volume = dscp->fid.volume;
3256 dirAFSFid.Vnode = dscp->fid.vnode;
3257 dirAFSFid.Unique = dscp->fid.unique;
3259 rxconnp = cm_GetRxConn(connp);
3260 code = RXAFS_MakeDir(connp->rxconnp, &dirAFSFid, fnamep,
3261 &inStatus, &newAFSFid, &newDirStatus,
3262 &updatedDirStatus, &newDirCallback,
3264 rx_PutConnection(rxconnp);
3266 } while (cm_Analyze(connp, userp, reqp,
3267 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, &cbReq, code));
3268 code = cm_MapRPCError(code, reqp);
3271 osi_Log1(afsd_logp, "CALL MakeDir FAILURE, code 0x%x", code);
3273 osi_Log0(afsd_logp, "CALL MakeDir SUCCESS");
3276 lock_ObtainWrite(&dirop.scp->dirlock);
3277 dirop.lockType = CM_DIRLOCK_WRITE;
3279 lock_ObtainWrite(&dscp->rw);
3281 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3282 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3283 if (cm_CheckDirOpForSingleChange(&dirop)) {
3284 lock_ReleaseWrite(&dscp->rw);
3285 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3287 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3289 lock_ObtainWrite(&dscp->rw);
3292 InterlockedDecrement(&dscp->activeRPCs);
3294 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3295 lock_ReleaseWrite(&dscp->rw);
3297 /* now try to create the new dir's entry, too, but be careful to
3298 * make sure that we don't merge in old info. Since we weren't locking
3299 * out any requests during the file's creation, we may have pretty old
3303 code = cm_GetSCache(&newFid, &dscp->fid, &scp, userp, reqp);
3305 lock_ObtainWrite(&scp->rw);
3306 if (!cm_HaveCallback(scp)) {
3307 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
3308 &newDirCallback, &volSync, 0);
3309 InterlockedIncrement(&scp->activeRPCs);
3311 code = cm_MergeStatus( dscp, scp, &newDirStatus, &volSync,
3315 lock_ReleaseWrite(&scp->rw);
3319 /* make sure we end things properly */
3321 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
3323 cm_EndDirOp(&dirop);
3331 cm_ReleaseSCache(scp);
3334 /* and return error code */
3338 long cm_Link(cm_scache_t *dscp, clientchar_t *cnamep, cm_scache_t *sscp, long flags,
3339 cm_user_t *userp, cm_req_t *reqp)
3344 AFSFid existingAFSFid;
3345 AFSFetchStatus updatedDirStatus;
3346 AFSFetchStatus newLinkStatus;
3348 struct rx_connection * rxconnp;
3350 fschar_t * fnamep = NULL;
3353 memset(&volSync, 0, sizeof(volSync));
3355 if (dscp->fid.cell != sscp->fid.cell ||
3356 dscp->fid.volume != sscp->fid.volume) {
3357 return CM_ERROR_CROSSDEVLINK;
3360 /* Check for RO volume */
3361 if (dscp->flags & CM_SCACHEFLAG_RO)
3362 return CM_ERROR_READONLY;
3364 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3366 lock_ObtainWrite(&dscp->rw);
3367 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3368 lock_ReleaseWrite(&dscp->rw);
3370 cm_EndDirOp(&dirop);
3375 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3377 /* try the RPC now */
3378 InterlockedIncrement(&dscp->activeRPCs);
3379 osi_Log1(afsd_logp, "CALL Link scp 0x%p", dscp);
3381 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3384 dirAFSFid.Volume = dscp->fid.volume;
3385 dirAFSFid.Vnode = dscp->fid.vnode;
3386 dirAFSFid.Unique = dscp->fid.unique;
3388 existingAFSFid.Volume = sscp->fid.volume;
3389 existingAFSFid.Vnode = sscp->fid.vnode;
3390 existingAFSFid.Unique = sscp->fid.unique;
3392 rxconnp = cm_GetRxConn(connp);
3393 code = RXAFS_Link(rxconnp, &dirAFSFid, fnamep, &existingAFSFid,
3394 &newLinkStatus, &updatedDirStatus, &volSync);
3395 rx_PutConnection(rxconnp);
3396 osi_Log1(afsd_logp," RXAFS_Link returns 0x%x", code);
3398 } while (cm_Analyze(connp, userp, reqp, &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, NULL, code));
3400 code = cm_MapRPCError(code, reqp);
3403 osi_Log1(afsd_logp, "CALL Link FAILURE, code 0x%x", code);
3405 osi_Log0(afsd_logp, "CALL Link SUCCESS");
3408 lock_ObtainWrite(&dirop.scp->dirlock);
3409 dirop.lockType = CM_DIRLOCK_WRITE;
3411 lock_ObtainWrite(&dscp->rw);
3413 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3416 if (cm_CheckDirOpForSingleChange(&dirop)) {
3417 lock_ReleaseWrite(&dscp->rw);
3418 cm_DirCreateEntry(&dirop, fnamep, &sscp->fid);
3420 cm_BPlusDirCreateEntry(&dirop, cnamep, &sscp->fid);
3422 lock_ObtainWrite(&dscp->rw);
3425 InterlockedDecrement(&dscp->activeRPCs);
3427 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3428 lock_ReleaseWrite(&dscp->rw);
3430 cm_EndDirOp(&dirop);
3432 if (invalidate && RDR_Initialized)
3433 RDR_InvalidateObject(dscp->fid.cell, dscp->fid.volume, dscp->fid.vnode,
3434 dscp->fid.unique, dscp->fid.hash,
3435 dscp->fileType, AFS_INVALIDATE_DATA_VERSION);
3437 /* Update the linked object status */
3439 lock_ObtainWrite(&sscp->rw);
3440 InterlockedIncrement(&sscp->activeRPCs);
3441 code = cm_MergeStatus(NULL, sscp, &newLinkStatus, &volSync, userp, reqp, 0);
3442 lock_ReleaseWrite(&sscp->rw);
3450 long cm_SymLink(cm_scache_t *dscp, clientchar_t *cnamep, fschar_t *contentsp, long flags,
3451 cm_attr_t *attrp, cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3459 AFSStoreStatus inStatus;
3460 AFSFetchStatus updatedDirStatus;
3461 AFSFetchStatus newLinkStatus;
3463 struct rx_connection * rxconnp;
3465 fschar_t *fnamep = NULL;
3470 /* Check for RO volume */
3471 if (dscp->flags & CM_SCACHEFLAG_RO)
3472 return CM_ERROR_READONLY;
3474 memset(&volSync, 0, sizeof(volSync));
3476 /* before starting the RPC, mark that we're changing the directory data,
3477 * so that someone who does a chmod on the dir will wait until our
3480 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3482 lock_ObtainWrite(&dscp->rw);
3483 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3484 lock_ReleaseWrite(&dscp->rw);
3486 cm_EndDirOp(&dirop);
3491 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3493 cm_StatusFromAttr(&inStatus, NULL, attrp);
3495 /* try the RPC now */
3496 InterlockedIncrement(&dscp->activeRPCs);
3497 osi_Log1(afsd_logp, "CALL Symlink scp 0x%p", dscp);
3499 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3503 dirAFSFid.Volume = dscp->fid.volume;
3504 dirAFSFid.Vnode = dscp->fid.vnode;
3505 dirAFSFid.Unique = dscp->fid.unique;
3507 rxconnp = cm_GetRxConn(connp);
3508 code = RXAFS_Symlink(rxconnp, &dirAFSFid, fnamep, contentsp,
3509 &inStatus, &newAFSFid, &newLinkStatus,
3510 &updatedDirStatus, &volSync);
3511 rx_PutConnection(rxconnp);
3513 } while (cm_Analyze(connp, userp, reqp,
3514 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, NULL, code));
3515 code = cm_MapRPCError(code, reqp);
3518 osi_Log1(afsd_logp, "CALL Symlink FAILURE, code 0x%x", code);
3520 osi_Log0(afsd_logp, "CALL Symlink SUCCESS");
3523 lock_ObtainWrite(&dirop.scp->dirlock);
3524 dirop.lockType = CM_DIRLOCK_WRITE;
3526 lock_ObtainWrite(&dscp->rw);
3528 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3529 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3530 if (cm_CheckDirOpForSingleChange(&dirop)) {
3531 lock_ReleaseWrite(&dscp->rw);
3532 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3534 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3536 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3538 lock_ObtainWrite(&dscp->rw);
3541 InterlockedDecrement(&dscp->activeRPCs);
3543 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3544 lock_ReleaseWrite(&dscp->rw);
3546 cm_EndDirOp(&dirop);
3548 /* now try to create the new dir's entry, too, but be careful to
3549 * make sure that we don't merge in old info. Since we weren't locking
3550 * out any requests during the file's creation, we may have pretty old
3554 code = cm_GetSCache(&newFid, &dscp->fid, &scp, userp, reqp);
3556 lock_ObtainWrite(&scp->rw);
3557 if (!cm_HaveCallback(scp)) {
3558 InterlockedIncrement(&scp->activeRPCs);
3559 code = cm_MergeStatus( dscp, scp, &newLinkStatus, &volSync,
3562 lock_ReleaseWrite(&scp->rw);
3567 cm_ReleaseSCache(scp);
3574 /* and return error code */
3578 /*! \brief Remove a directory
3580 Encapsulates a call to RXAFS_RemoveDir().
3582 \param[in] dscp cm_scache_t for the directory containing the
3583 directory to be removed.
3585 \param[in] fnamep This will be the original name of the directory
3586 as known to the file server. It will be passed in to RXAFS_RemoveDir().
3587 This parameter is optional. If it is not provided the value
3590 \param[in] cnamep Normalized name used to update the local
3593 \param[in] userp cm_user_t for the request.
3595 \param[in] reqp Request tracker.
3597 long cm_RemoveDir(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t *cnamep, cm_user_t *userp, cm_req_t *reqp)
3603 AFSFetchStatus updatedDirStatus;
3605 struct rx_connection * rxconnp;
3607 cm_scache_t *scp = NULL;
3608 int free_fnamep = FALSE;
3610 memset(&volSync, 0, sizeof(volSync));
3612 if (fnamep == NULL) {
3615 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
3616 CM_DIROP_FLAG_NONE, &dirop);
3618 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
3621 cm_EndDirOp(&dirop);
3628 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
3632 /* Check for RO volume */
3633 if (dscp->flags & CM_SCACHEFLAG_RO) {
3634 code = CM_ERROR_READONLY;
3638 /* before starting the RPC, mark that we're changing the directory data,
3639 * so that someone who does a chmod on the dir will wait until our
3642 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3644 lock_ObtainWrite(&dscp->rw);
3645 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3646 lock_ReleaseWrite(&dscp->rw);
3648 cm_EndDirOp(&dirop);
3653 /* try the RPC now */
3654 InterlockedIncrement(&dscp->activeRPCs);
3655 osi_Log1(afsd_logp, "CALL RemoveDir scp 0x%p", dscp);
3657 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3661 dirAFSFid.Volume = dscp->fid.volume;
3662 dirAFSFid.Vnode = dscp->fid.vnode;
3663 dirAFSFid.Unique = dscp->fid.unique;
3665 rxconnp = cm_GetRxConn(connp);
3666 code = RXAFS_RemoveDir(rxconnp, &dirAFSFid, fnamep,
3667 &updatedDirStatus, &volSync);
3668 rx_PutConnection(rxconnp);
3670 } while (cm_Analyze(connp, userp, reqp,
3671 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, NULL, code));
3672 code = cm_MapRPCErrorRmdir(code, reqp);
3675 osi_Log1(afsd_logp, "CALL RemoveDir FAILURE, code 0x%x", code);
3677 osi_Log0(afsd_logp, "CALL RemoveDir SUCCESS");
3680 lock_ObtainWrite(&dirop.scp->dirlock);
3681 dirop.lockType = CM_DIRLOCK_WRITE;
3683 lock_ObtainWrite(&dscp->rw);
3685 cm_dnlcRemove(dscp, cnamep);
3686 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3687 if (cm_CheckDirOpForSingleChange(&dirop) && cnamep != NULL) {
3688 lock_ReleaseWrite(&dscp->rw);
3689 cm_DirDeleteEntry(&dirop, fnamep);
3691 cm_BPlusDirDeleteEntry(&dirop, cnamep);
3693 lock_ObtainWrite(&dscp->rw);
3696 InterlockedDecrement(&dscp->activeRPCs);
3698 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3699 lock_ReleaseWrite(&dscp->rw);
3701 cm_EndDirOp(&dirop);
3705 lock_ObtainWrite(&scp->rw);
3706 scp->flags |= CM_SCACHEFLAG_DELETED;
3707 lock_ObtainWrite(&cm_scacheLock);
3708 cm_AdjustScacheLRU(scp);
3709 cm_RemoveSCacheFromHashTable(scp);
3710 lock_ReleaseWrite(&cm_scacheLock);
3711 lock_ReleaseWrite(&scp->rw);
3712 if (RDR_Initialized && !(reqp->flags & CM_REQ_SOURCE_REDIR))
3713 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode,
3714 scp->fid.unique, scp->fid.hash,
3715 scp->fileType, AFS_INVALIDATE_DELETED);
3717 cm_ReleaseSCache(scp);
3724 /* and return error code */
3728 long cm_Open(cm_scache_t *scp, int type, cm_user_t *userp)
3730 /* grab mutex on contents */
3731 lock_ObtainWrite(&scp->rw);
3733 /* reset the prefetch info */
3734 scp->prefetch.base.LowPart = 0; /* base */
3735 scp->prefetch.base.HighPart = 0;
3736 scp->prefetch.end.LowPart = 0; /* and end */
3737 scp->prefetch.end.HighPart = 0;
3739 /* release mutex on contents */
3740 lock_ReleaseWrite(&scp->rw);
3746 /*! \brief Rename a file or directory
3748 Encapsulates a RXAFS_Rename() call.
3750 \param[in] oldDscp cm_scache_t for the directory containing the old
3753 \param[in] oldNamep The original old name known to the file server.
3754 This is the name that will be passed into the RXAFS_Rename().
3755 If it is not provided, it will be looked up.
3757 \param[in] normalizedOldNamep Normalized old name. This is used for
3758 updating local directory caches.
3760 \param[in] newDscp cm_scache_t for the directory containing the new
3763 \param[in] newNamep New name. Normalized.
3765 \param[in] userp cm_user_t for the request.
3767 \param[in,out] reqp Request tracker.
3770 long cm_Rename(cm_scache_t *oldDscp, fschar_t *oldNamep, clientchar_t *cOldNamep,
3771 cm_scache_t *newDscp, clientchar_t *cNewNamep, cm_user_t *userp,
3776 AFSFid oldDirAFSFid;
3777 AFSFid newDirAFSFid;
3778 AFSFetchStatus updatedOldDirStatus;
3779 AFSFetchStatus updatedNewDirStatus;
3782 int bTargetExists = 0;
3783 struct rx_connection * rxconnp;
3784 cm_dirOp_t oldDirOp;
3787 cm_dirOp_t newDirOp;
3788 fschar_t * newNamep = NULL;
3789 int free_oldNamep = FALSE;
3790 cm_scache_t *oldScp = NULL, *oldTargetScp = NULL;
3791 int rpc_skipped = 0;
3793 memset(&volSync, 0, sizeof(volSync));
3795 if (cOldNamep == NULL || cNewNamep == NULL ||
3796 cm_ClientStrLen(cOldNamep) == 0 ||
3797 cm_ClientStrLen(cNewNamep) == 0)
3798 return CM_ERROR_INVAL;
3800 /* check for identical names */
3801 if (oldDscp == newDscp &&
3802 cm_ClientStrCmp(cOldNamep, cNewNamep) == 0) {
3803 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_RENAME_IDENTICAL",
3805 return CM_ERROR_RENAME_IDENTICAL;
3808 /* Check for RO volume */
3809 if ((oldDscp->flags & CM_SCACHEFLAG_RO) || (newDscp->flags & CM_SCACHEFLAG_RO)) {
3810 return CM_ERROR_READONLY;
3813 if (oldNamep == NULL) {
3816 code = cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_READ,
3817 CM_DIROP_FLAG_NONE, &oldDirOp);
3819 code = cm_BPlusDirLookupOriginalName(&oldDirOp, cOldNamep, &oldNamep);
3821 free_oldNamep = TRUE;
3822 cm_EndDirOp(&oldDirOp);
3826 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S Original Name lookup failed",
3827 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3832 /* before starting the RPC, mark that we're changing the directory data,
3833 * so that someone who does a chmod on the dir will wait until our call
3834 * completes. We do this in vnode order so that we don't deadlock,
3835 * which makes the code a little verbose.
3837 if (oldDscp == newDscp) {
3839 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3840 CM_DIROP_FLAG_NONE, &oldDirOp);
3841 lock_ObtainWrite(&oldDscp->rw);
3842 cm_dnlcRemove(oldDscp, cOldNamep);
3843 cm_dnlcRemove(oldDscp, cNewNamep);
3844 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3845 CM_SCACHESYNC_STOREDATA);
3846 lock_ReleaseWrite(&oldDscp->rw);
3848 cm_EndDirOp(&oldDirOp);
3852 /* two distinct dir vnodes */
3854 if (oldDscp->fid.cell != newDscp->fid.cell ||
3855 oldDscp->fid.volume != newDscp->fid.volume) {
3856 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_CROSSDEVLINK",
3858 code = CM_ERROR_CROSSDEVLINK;
3862 /* shouldn't happen that we have distinct vnodes for two
3863 * different files, but could due to deliberate attack, or
3864 * stale info. Avoid deadlocks and quit now.
3866 if (oldDscp->fid.vnode == newDscp->fid.vnode) {
3867 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p vnode collision",
3869 code = CM_ERROR_CROSSDEVLINK;
3873 if (oldDscp->fid.vnode < newDscp->fid.vnode) {
3874 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3875 CM_DIROP_FLAG_NONE, &oldDirOp);
3876 lock_ObtainWrite(&oldDscp->rw);
3877 cm_dnlcRemove(oldDscp, cOldNamep);
3878 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3879 CM_SCACHESYNC_STOREDATA);
3880 lock_ReleaseWrite(&oldDscp->rw);
3882 cm_EndDirOp(&oldDirOp);
3884 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3885 CM_DIROP_FLAG_NONE, &newDirOp);
3886 lock_ObtainWrite(&newDscp->rw);
3887 cm_dnlcRemove(newDscp, cNewNamep);
3888 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3889 CM_SCACHESYNC_STOREDATA);
3890 lock_ReleaseWrite(&newDscp->rw);
3892 cm_EndDirOp(&newDirOp);
3894 /* cleanup first one */
3895 lock_ObtainWrite(&oldDscp->rw);
3896 cm_SyncOpDone(oldDscp, NULL,
3897 CM_SCACHESYNC_STOREDATA);
3898 lock_ReleaseWrite(&oldDscp->rw);
3899 cm_EndDirOp(&oldDirOp);
3904 /* lock the new vnode entry first */
3905 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3906 CM_DIROP_FLAG_NONE, &newDirOp);
3907 lock_ObtainWrite(&newDscp->rw);
3908 cm_dnlcRemove(newDscp, cNewNamep);
3909 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3910 CM_SCACHESYNC_STOREDATA);
3911 lock_ReleaseWrite(&newDscp->rw);
3913 cm_EndDirOp(&newDirOp);
3915 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3916 CM_DIROP_FLAG_NONE, &oldDirOp);
3917 lock_ObtainWrite(&oldDscp->rw);
3918 cm_dnlcRemove(oldDscp, cOldNamep);
3919 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3920 CM_SCACHESYNC_STOREDATA);
3921 lock_ReleaseWrite(&oldDscp->rw);
3923 cm_EndDirOp(&oldDirOp);
3925 /* cleanup first one */
3926 lock_ObtainWrite(&newDscp->rw);
3927 cm_SyncOpDone(newDscp, NULL,
3928 CM_SCACHESYNC_STOREDATA);
3929 lock_ReleaseWrite(&newDscp->rw);
3930 cm_EndDirOp(&newDirOp);
3934 } /* two distinct vnodes */
3940 * The source and destination directories are now locked and no other local
3941 * changes can occur.
3943 * Before we permit the operation, make sure that we do not already have
3944 * an object in the destination directory that has a case-insensitive match
3945 * for this name UNLESS the matching object is the object we are renaming.
3947 code = cm_Lookup(oldDscp, cOldNamep, 0, userp, reqp, &oldScp);
3949 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S old name lookup failed",
3950 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3955 /* Case sensitive lookup. If this succeeds we are done. */
3956 code = cm_Lookup(newDscp, cNewNamep, 0, userp, reqp, &oldTargetScp);
3959 * Case insensitive lookup. If this succeeds, it could have found the
3960 * same file with a name that differs only by case or it could be a
3961 * different file entirely.
3963 code = cm_Lookup(newDscp, cNewNamep, CM_FLAG_CASEFOLD, userp, reqp, &oldTargetScp);
3965 /* found a matching object with the new name */
3966 if (cm_FidCmp(&oldScp->fid, &oldTargetScp->fid)) {
3967 /* and they don't match so return an error */
3968 osi_Log2(afsd_logp, "cm_Rename newDscp 0x%p cNewName %S new name already exists",
3969 newDscp, osi_LogSaveStringW(afsd_logp, cNewNamep));
3970 code = CM_ERROR_EXISTS;
3972 cm_ReleaseSCache(oldTargetScp);
3973 oldTargetScp = NULL;
3974 } else if (code == CM_ERROR_AMBIGUOUS_FILENAME) {
3975 code = CM_ERROR_EXISTS;
3977 /* The target does not exist. Clear the error and perform the rename. */
3989 newNamep = cm_ClientStringToFsStringAlloc(cNewNamep, -1, NULL);
3991 /* try the RPC now */
3992 InterlockedIncrement(&oldDscp->activeRPCs);
3994 InterlockedIncrement(&newDscp->activeRPCs);
3995 osi_Log2(afsd_logp, "CALL Rename old scp 0x%p new scp 0x%p",
3998 code = cm_ConnFromFID(&oldDscp->fid, userp, reqp, &connp);
4002 oldDirAFSFid.Volume = oldDscp->fid.volume;
4003 oldDirAFSFid.Vnode = oldDscp->fid.vnode;
4004 oldDirAFSFid.Unique = oldDscp->fid.unique;
4005 newDirAFSFid.Volume = newDscp->fid.volume;
4006 newDirAFSFid.Vnode = newDscp->fid.vnode;
4007 newDirAFSFid.Unique = newDscp->fid.unique;
4009 rxconnp = cm_GetRxConn(connp);
4010 code = RXAFS_Rename(rxconnp, &oldDirAFSFid, oldNamep,
4011 &newDirAFSFid, newNamep,
4012 &updatedOldDirStatus, &updatedNewDirStatus,
4014 rx_PutConnection(rxconnp);
4016 } while (cm_Analyze(connp, userp, reqp, &oldDscp->fid, NULL, 1,
4017 &updatedOldDirStatus, &volSync, NULL, NULL, code));
4018 code = cm_MapRPCError(code, reqp);
4021 osi_Log1(afsd_logp, "CALL Rename FAILURE, code 0x%x", code);
4023 osi_Log0(afsd_logp, "CALL Rename SUCCESS");
4026 /* update the individual stat cache entries for the directories */
4028 lock_ObtainWrite(&oldDirOp.scp->dirlock);
4029 oldDirOp.lockType = CM_DIRLOCK_WRITE;
4032 lock_ObtainWrite(&oldDscp->rw);
4034 code = cm_MergeStatus( NULL, oldDscp, &updatedOldDirStatus, &volSync,
4035 userp, reqp, CM_MERGEFLAG_DIROP);
4036 if (cm_CheckDirOpForSingleChange(&oldDirOp)) {
4037 lock_ReleaseWrite(&oldDscp->rw);
4038 if (bTargetExists && oneDir) {
4039 diropCode = cm_DirDeleteEntry(&oldDirOp, newNamep);
4041 cm_BPlusDirDeleteEntry(&oldDirOp, cNewNamep);
4046 diropCode = cm_BPlusDirLookup(&oldDirOp, cOldNamep, &fileFid);
4047 if (diropCode == CM_ERROR_INEXACT_MATCH)
4049 else if (diropCode == EINVAL)
4051 diropCode = cm_DirLookup(&oldDirOp, oldNamep, &fileFid);
4053 if (diropCode == 0) {
4055 diropCode = cm_DirCreateEntry(&oldDirOp, newNamep, &fileFid);
4057 cm_BPlusDirCreateEntry(&oldDirOp, cNewNamep, &fileFid);
4061 if (diropCode == 0) {
4062 diropCode = cm_DirDeleteEntry(&oldDirOp, oldNamep);
4064 cm_BPlusDirDeleteEntry(&oldDirOp, cOldNamep);
4068 lock_ObtainWrite(&oldDscp->rw);
4072 InterlockedDecrement(&oldDscp->activeRPCs);
4074 cm_SyncOpDone(oldDscp, NULL, CM_SCACHESYNC_STOREDATA);
4075 lock_ReleaseWrite(&oldDscp->rw);
4077 cm_EndDirOp(&oldDirOp);
4079 /* and update it for the new one, too, if necessary */
4082 lock_ObtainWrite(&newDirOp.scp->dirlock);
4083 newDirOp.lockType = CM_DIRLOCK_WRITE;
4085 lock_ObtainWrite(&newDscp->rw);
4087 code = cm_MergeStatus( NULL, newDscp, &updatedNewDirStatus, &volSync,
4088 userp, reqp, CM_MERGEFLAG_DIROP);
4091 * we only make the local change if we successfully made
4092 * the change in the old directory AND there was only one
4093 * change in the new directory
4095 if (diropCode == 0 && cm_CheckDirOpForSingleChange(&newDirOp)) {
4096 lock_ReleaseWrite(&newDscp->rw);
4098 if (bTargetExists && !oneDir) {
4099 diropCode = cm_DirDeleteEntry(&newDirOp, newNamep);
4101 cm_BPlusDirDeleteEntry(&newDirOp, cNewNamep);
4105 cm_DirCreateEntry(&newDirOp, newNamep, &fileFid);
4107 cm_BPlusDirCreateEntry(&newDirOp, cNewNamep, &fileFid);
4109 lock_ObtainWrite(&newDscp->rw);
4113 InterlockedIncrement(&newDscp->activeRPCs);
4115 cm_SyncOpDone(newDscp, NULL, CM_SCACHESYNC_STOREDATA);
4116 lock_ReleaseWrite(&newDscp->rw);
4118 cm_EndDirOp(&newDirOp);
4123 * After the rename the file server has invalidated the callbacks
4124 * on the file that was moved and destroyed any target file.
4126 lock_ObtainWrite(&oldScp->rw);
4127 cm_DiscardSCache(oldScp);
4128 lock_ReleaseWrite(&oldScp->rw);
4130 if (RDR_Initialized)
4131 RDR_InvalidateObject(oldScp->fid.cell, oldScp->fid.volume, oldScp->fid.vnode, oldScp->fid.unique,
4132 oldScp->fid.hash, oldScp->fileType, AFS_INVALIDATE_CALLBACK);
4135 lock_ObtainWrite(&oldTargetScp->rw);
4136 cm_DiscardSCache(oldTargetScp);
4137 lock_ReleaseWrite(&oldTargetScp->rw);
4139 if (RDR_Initialized)
4140 RDR_InvalidateObject(oldTargetScp->fid.cell, oldTargetScp->fid.volume, oldTargetScp->fid.vnode, oldTargetScp->fid.unique,
4141 oldTargetScp->fid.hash, oldTargetScp->fileType, AFS_INVALIDATE_CALLBACK);
4147 cm_ReleaseSCache(oldScp);
4150 cm_ReleaseSCache(oldTargetScp);
4157 /* and return error code */
4161 /* Byte range locks:
4163 The OpenAFS Windows client has to fake byte range locks given no
4164 server side support for such locks. This is implemented as keyed
4165 byte range locks on the cache manager.
4167 Keyed byte range locks:
4169 Each cm_scache_t structure keeps track of a list of keyed locks.
4170 The key for a lock identifies an owner of a set of locks (referred
4171 to as a client). Each key is represented by a value. The set of
4172 key values used within a specific cm_scache_t structure form a
4173 namespace that has a scope of just that cm_scache_t structure. The
4174 same key value can be used with another cm_scache_t structure and
4175 correspond to a completely different client. However it is
4176 advantageous for the SMB or IFS layer to make sure that there is a
4177 1-1 mapping between client and keys over all cm_scache_t objects.
4179 Assume a client C has key Key(C) (although, since the scope of the
4180 key is a cm_scache_t, the key can be Key(C,S), where S is the
4181 cm_scache_t. But assume a 1-1 relation between keys and clients).
4182 A byte range (O,+L) denotes byte addresses (O) through (O+L-1)
4183 inclusive (a.k.a. [O,O+L-1]). The function Key(x) is implemented
4184 through cm_generateKey() function for both SMB and IFS.
4186 The list of locks for a cm_scache_t object S is maintained in
4187 S->fileLocks. The cache manager will set a lock on the AFS file
4188 server in order to assert the locks in S->fileLocks. If only
4189 shared locks are in place for S, then the cache manager will obtain
4190 a LockRead lock, while if there are any exclusive locks, it will
4191 obtain a LockWrite lock. If the exclusive locks are all released
4192 while the shared locks remain, then the cache manager will
4193 downgrade the lock from LockWrite to LockRead. Similarly, if an
4194 exclusive lock is obtained when only shared locks exist, then the
4195 cache manager will try to upgrade the lock from LockRead to
4198 Each lock L owned by client C maintains a key L->key such that
4199 L->key == Key(C), the effective range defined by L->LOffset and
4200 L->LLength such that the range of bytes affected by the lock is
4201 (L->LOffset, +L->LLength), a type maintained in L->LockType which
4202 is either exclusive or shared.
4206 A lock exists iff it is in S->fileLocks for some cm_scache_t
4207 S. Existing locks are in one of the following states: ACTIVE,
4208 WAITLOCK, WAITUNLOCK, LOST, DELETED.
4210 The following sections describe each lock and the associated
4213 1. ACTIVE: A lock L is ACTIVE iff the cache manager has asserted
4214 the lock with the AFS file server. This type of lock can be
4215 exercised by a client to read or write to the locked region (as
4218 1.1 ACTIVE->LOST: When the AFS file server fails to extend a
4219 server lock that was required to assert the lock. Before
4220 marking the lock as lost, the cache manager checks if the file
4221 has changed on the server. If the file has not changed, then
4222 the cache manager will attempt to obtain a new server lock
4223 that is sufficient to assert the client side locks for the
4224 file. If any of these fail, the lock is marked as LOST.
4225 Otherwise, it is left as ACTIVE.
4227 1.2 ACTIVE->DELETED: Lock is released.
4229 2. WAITLOCK: A lock is in a WAITLOCK state if the cache manager
4230 grants the lock but the lock is yet to be asserted with the AFS
4231 file server. Once the file server grants the lock, the state
4232 will transition to an ACTIVE lock.
4234 2.1 WAITLOCK->ACTIVE: The server granted the lock.
4236 2.2 WAITLOCK->DELETED: Lock is abandoned, or timed out during
4239 2.3 WAITLOCK->LOST: One or more locks from this client were
4240 marked as LOST. No further locks will be granted to this
4241 client until all lost locks are removed.
4243 3. WAITUNLOCK: A lock is in a WAITUNLOCK state if the cache manager
4244 receives a request for a lock that conflicts with an existing
4245 ACTIVE or WAITLOCK lock. The lock will be placed in the queue
4246 and will be granted at such time the conflicting locks are
4247 removed, at which point the state will transition to either
4250 3.1 WAITUNLOCK->ACTIVE: The conflicting lock was removed. The
4251 current serverLock is sufficient to assert this lock, or a
4252 sufficient serverLock is obtained.
4254 3.2 WAITUNLOCK->WAITLOCK: The conflicting lock was removed,
4255 however the required serverLock is yet to be asserted with the
4258 3.3 WAITUNLOCK->DELETED: The lock is abandoned, timed out or
4261 3.5 WAITUNLOCK->LOST: One or more locks from this client were
4262 marked as LOST. No further locks will be granted to this
4263 client until all lost locks are removed.
4265 4. LOST: A lock L is LOST if the server lock that was required to
4266 assert the lock could not be obtained or if it could not be
4267 extended, or if other locks by the same client were LOST.
4268 Essentially, once a lock is LOST, the contract between the cache
4269 manager and that specific client is no longer valid.
4271 The cache manager rechecks the server lock once every minute and
4272 extends it as appropriate. If this is not done for 5 minutes,
4273 the AFS file server will release the lock (the 5 minute timeout
4274 is based on current file server code and is fairly arbitrary).
4275 Once released, the lock cannot be re-obtained without verifying
4276 that the contents of the file hasn't been modified since the
4277 time the lock was released. Re-obtaining the lock without
4278 verifying this may lead to data corruption. If the lock can not
4279 be obtained safely, then all active locks for the cm_scache_t
4282 4.1 LOST->DELETED: The lock is released.
4284 5. DELETED: The lock is no longer relevant. Eventually, it will
4285 get removed from the cm_scache_t. In the meantime, it will be
4286 treated as if it does not exist.
4288 5.1 DELETED->not exist: The lock is removed from the
4291 The following are classifications of locks based on their state.
4293 6* A lock L is ACCEPTED if it is ACTIVE or WAITLOCK. These locks
4294 have been accepted by the cache manager, but may or may not have
4295 been granted back to the client.
4297 7* A lock L is QUEUED if it is ACTIVE, WAITLOCK or WAITUNLOCK.
4299 8* A lock L is WAITING if it is WAITLOCK or WAITUNLOCK.
4303 A client C can READ range (Offset,+Length) of a file represented by
4304 cm_scache_t S iff (1):
4306 1. for all _a_ in (Offset,+Length), all of the following is true:
4308 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4309 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4312 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4313 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4316 (When locks are lost on an cm_scache_t, all locks are lost. By
4317 4.2 (below), if there is an exclusive LOST lock, then there
4318 can't be any overlapping ACTIVE locks.)
4320 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4322 2. for all _a_ in (Offset,+Length), one of the following is true:
4324 2.1 Byte _a_ of S is unowned (as specified in 1.1) AND there
4325 does not exist a LOST lock L such that _a_ in
4326 (L->LOffset,+L->LLength).
4328 2.2 Byte _a_ of S is owned by C under lock L (as specified in
4329 1.2) AND L->LockType is exclusive.
4331 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4333 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4336 3.1 If L->LockType is exclusive then there does NOT exist a
4337 ACCEPTED lock M in S->fileLocks such that _a_ in
4338 (M->LOffset,+M->LLength).
4340 (If we count all QUEUED locks then we hit cases such as
4341 cascading waiting locks where the locks later on in the queue
4342 can be granted without compromising file integrity. On the
4343 other hand if only ACCEPTED locks are considered, then locks
4344 that were received earlier may end up waiting for locks that
4345 were received later to be unlocked. The choice of ACCEPTED
4346 locks was made to mimic the Windows byte range lock
4349 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4350 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4351 M->LockType is shared.
4353 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4355 4.1 M->key != Key(C)
4357 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4358 and (M->LOffset,+M->LLength) do not intersect.
4360 (Note: If a client loses a lock, it loses all locks.
4361 Subsequently, it will not be allowed to obtain any more locks
4362 until all existing LOST locks that belong to the client are
4363 released. Once all locks are released by a single client,
4364 there exists no further contract between the client and AFS
4365 about the contents of the file, hence the client can then
4366 proceed to obtain new locks and establish a new contract.
4368 This doesn't quite work as you think it should, because most
4369 applications aren't built to deal with losing locks they
4370 thought they once had. For now, we don't have a good
4371 solution to lost locks.
4373 Also, for consistency reasons, we have to hold off on
4374 granting locks that overlap exclusive LOST locks.)
4376 A client C can only unlock locks L in S->fileLocks which have
4379 The representation and invariants are as follows:
4381 - Each cm_scache_t structure keeps:
4383 - A queue of byte-range locks (cm_scache_t::fileLocks) which
4384 are of type cm_file_lock_t.
4386 - A record of the highest server-side lock that has been
4387 obtained for this object (cm_scache_t::serverLock), which is
4388 one of (-1), LockRead, LockWrite.
4390 - A count of ACCEPTED exclusive and shared locks that are in the
4391 queue (cm_scache_t::sharedLocks and
4392 cm_scache_t::exclusiveLocks)
4394 - Each cm_file_lock_t structure keeps:
4396 - The type of lock (cm_file_lock_t::LockType)
4398 - The key associated with the lock (cm_file_lock_t::key)
4400 - The offset and length of the lock (cm_file_lock_t::LOffset
4401 and cm_file_lock_t::LLength)
4403 - The state of the lock.
4405 - Time of issuance or last successful extension
4407 Semantic invariants:
4409 I1. The number of ACCEPTED locks in S->fileLocks are
4410 (S->sharedLocks + S->exclusiveLocks)
4412 External invariants:
4414 I3. S->serverLock is the lock that we have asserted with the
4415 AFS file server for this cm_scache_t.
4417 I4. S->serverLock == LockRead iff there is at least one ACTIVE
4418 shared lock, but no ACTIVE exclusive locks.
4420 I5. S->serverLock == LockWrite iff there is at least one ACTIVE
4423 I6. If L is a LOST lock, then for each lock M in S->fileLocks,
4424 M->key == L->key IMPLIES M is LOST or DELETED.
4429 #define IS_LOCK_ACTIVE(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == 0)
4431 #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)
4433 #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)
4435 #define IS_LOCK_LOST(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_LOST)
4437 #define IS_LOCK_DELETED(lockp) (((lockp)->flags & CM_FILELOCK_FLAG_DELETED) == CM_FILELOCK_FLAG_DELETED)
4440 #define IS_LOCK_ACCEPTED(lockp) (IS_LOCK_ACTIVE(lockp) || IS_LOCK_WAITLOCK(lockp))
4443 #define IS_LOCK_CLIENTONLY(lockp) ((((lockp)->scp->flags & CM_SCACHEFLAG_RO) == CM_SCACHEFLAG_RO) || (((lockp)->flags & CM_FILELOCK_FLAG_CLIENTONLY) == CM_FILELOCK_FLAG_CLIENTONLY))
4446 #define INTERSECT_RANGE(r1,r2) (((r2).offset+(r2).length) > (r1).offset && ((r1).offset +(r1).length) > (r2).offset)
4449 #define CONTAINS_RANGE(r1,r2) (((r2).offset+(r2).length) <= ((r1).offset+(r1).length) && (r1).offset <= (r2).offset)
4451 #if defined(VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS) && !defined(LOCK_TESTING)
4452 #define SCP_SUPPORTS_BRLOCKS(scp) ((scp)->cbServerp && ((scp)->cbServerp->capabilities & VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS))
4454 #define SCP_SUPPORTS_BRLOCKS(scp) (1)
4457 #define SERVERLOCKS_ENABLED(scp) (!((scp)->flags & CM_SCACHEFLAG_RO) && cm_enableServerLocks && SCP_SUPPORTS_BRLOCKS(scp))
4459 #if defined(VICED_CAPABILITY_WRITELOCKACL)
4460 #define SCP_SUPPORTS_WRITELOCKACL(scp) ((scp)->cbServerp && ((scp->cbServerp->capabilities & VICED_CAPABILITY_WRITELOCKACL)))
4462 #define SCP_SUPPORTS_WRITELOCKACL(scp) (0)
4464 /* This should really be defined in any build that this code is being
4466 #error VICED_CAPABILITY_WRITELOCKACL not defined.
4469 static void cm_LockRangeSubtract(cm_range_t * pos, const cm_range_t * neg)
4471 afs_int64 int_begin;
4474 int_begin = max(pos->offset, neg->offset);
4475 int_end = min(pos->offset+pos->length, neg->offset+neg->length);
4477 if (int_begin < int_end) {
4478 if (int_begin == pos->offset) {
4479 pos->length = pos->offset + pos->length - int_end;
4480 pos->offset = int_end;
4481 } else if (int_end == pos->offset + pos->length) {
4482 pos->length = int_begin - pos->offset;
4485 /* We only subtract ranges if the resulting range is
4486 contiguous. If we try to support non-contigous ranges, we
4487 aren't actually improving performance. */
4491 /* Called with scp->rw held. Returns 0 if all is clear to read the
4492 specified range by the client identified by key.
4494 long cm_LockCheckRead(cm_scache_t *scp,
4495 LARGE_INTEGER LOffset,
4496 LARGE_INTEGER LLength,
4499 #ifndef ADVISORY_LOCKS
4501 cm_file_lock_t *fileLock;
4505 int substract_ranges = FALSE;
4507 range.offset = LOffset.QuadPart;
4508 range.length = LLength.QuadPart;
4512 1. for all _a_ in (Offset,+Length), all of the following is true:
4514 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4515 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4518 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4519 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4524 lock_ObtainRead(&cm_scacheLock);
4526 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4528 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4530 if (INTERSECT_RANGE(range, fileLock->range)) {
4531 if (IS_LOCK_ACTIVE(fileLock)) {
4532 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4534 /* If there is an active lock for this client, it
4535 is safe to substract ranges.*/
4536 cm_LockRangeSubtract(&range, &fileLock->range);
4537 substract_ranges = TRUE;
4539 if (fileLock->lockType != LockRead) {
4540 code = CM_ERROR_LOCK_CONFLICT;
4544 /* even if the entire range is locked for reading,
4545 we still can't grant the lock at this point
4546 because the client may have lost locks. That
4547 is, unless we have already seen an active lock
4548 belonging to the client, in which case there
4549 can't be any lost locks for this client. */
4550 if (substract_ranges)
4551 cm_LockRangeSubtract(&range, &fileLock->range);
4553 } else if (IS_LOCK_LOST(fileLock) &&
4554 (cm_KeyEquals(&fileLock->key, &key, 0) || fileLock->lockType == LockWrite)) {
4555 code = CM_ERROR_BADFD;
4561 lock_ReleaseRead(&cm_scacheLock);
4563 osi_Log4(afsd_logp, "cm_LockCheckRead scp 0x%x offset %d length %d code 0x%x",
4564 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4575 /* Called with scp->rw held. Returns 0 if all is clear to write the
4576 specified range by the client identified by key.
4578 long cm_LockCheckWrite(cm_scache_t *scp,
4579 LARGE_INTEGER LOffset,
4580 LARGE_INTEGER LLength,
4583 #ifndef ADVISORY_LOCKS
4585 cm_file_lock_t *fileLock;
4590 range.offset = LOffset.QuadPart;
4591 range.length = LLength.QuadPart;
4594 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4596 2. for all _a_ in (Offset,+Length), one of the following is true:
4598 2.1 Byte _a_ of S is unowned AND there does not exist a LOST
4599 lock L such that _a_ in (L->LOffset,+L->LLength).
4601 2.2 Byte _a_ of S is owned by C under lock L AND L->LockType is
4605 lock_ObtainRead(&cm_scacheLock);
4607 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4609 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4611 if (INTERSECT_RANGE(range, fileLock->range)) {
4612 if (IS_LOCK_ACTIVE(fileLock)) {
4613 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4614 if (fileLock->lockType == LockWrite) {
4616 /* if there is an active lock for this client, it
4617 is safe to substract ranges */
4618 cm_LockRangeSubtract(&range, &fileLock->range);
4620 code = CM_ERROR_LOCK_CONFLICT;
4624 code = CM_ERROR_LOCK_CONFLICT;
4627 } else if (IS_LOCK_LOST(fileLock)) {
4628 code = CM_ERROR_BADFD;
4634 lock_ReleaseRead(&cm_scacheLock);
4636 osi_Log4(afsd_logp, "cm_LockCheckWrite scp 0x%x offset %d length %d code 0x%x",
4637 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4648 /* Called with cm_scacheLock write locked */
4649 static cm_file_lock_t * cm_GetFileLock(void) {
4652 l = (cm_file_lock_t *) cm_freeFileLocks;
4654 osi_QRemove(&cm_freeFileLocks, &l->q);
4656 l = malloc(sizeof(cm_file_lock_t));
4657 osi_assertx(l, "null cm_file_lock_t");
4660 memset(l, 0, sizeof(cm_file_lock_t));
4665 /* Called with cm_scacheLock write locked */
4666 static void cm_PutFileLock(cm_file_lock_t *l) {
4667 osi_QAdd(&cm_freeFileLocks, &l->q);
4670 /* called with scp->rw held. May release it during processing, but
4671 leaves it held on exit. */
4672 long cm_IntSetLock(cm_scache_t * scp, cm_user_t * userp, int lockType,
4678 struct rx_connection * rxconnp;
4680 afs_uint32 reqflags = reqp->flags;
4682 osi_Log2(afsd_logp, "CALL SetLock scp 0x%p for lock %d", scp, lockType);
4686 * The file server prior to 1.6.2 does not report an accurate value
4687 * and callbacks are not issued if the lock is dropped due to expiration.
4689 if ((lockType != LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount != 0) ||
4690 (lockType == LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount < 0))
4692 code = CM_ERROR_LOCK_NOT_GRANTED;
4693 osi_Log2(afsd_logp, "CALL SetLock FAILURE, fsLockCount %d code 0x%x", scp->fsLockCount, code);
4698 memset(&volSync, 0, sizeof(volSync));
4700 tfid.Volume = scp->fid.volume;
4701 tfid.Vnode = scp->fid.vnode;
4702 tfid.Unique = scp->fid.unique;
4705 reqp->flags |= CM_REQ_NORETRY;
4706 lock_ReleaseWrite(&scp->rw);
4709 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4713 rxconnp = cm_GetRxConn(connp);
4714 code = RXAFS_SetLock(rxconnp, &tfid, lockType,
4716 rx_PutConnection(rxconnp);
4718 } while (cm_Analyze(connp, userp, reqp, &cfid, NULL, 1, NULL, &volSync,
4721 code = cm_MapRPCError(code, reqp);
4723 osi_Log1(afsd_logp, "CALL SetLock FAILURE, code 0x%x", code);
4725 osi_Log0(afsd_logp, "CALL SetLock SUCCESS");
4728 reqp->flags = reqflags;
4730 lock_ObtainWrite(&scp->rw);
4733 * The file server does not return a status structure so we must
4734 * locally track the file server lock count to the best of our
4737 if (lockType == LockWrite)
4738 scp->fsLockCount = -1;
4745 /* called with scp->rw held. Releases it during processing */
4746 long cm_IntReleaseLock(cm_scache_t * scp, cm_user_t * userp,
4752 struct rx_connection * rxconnp;
4755 if (scp->flags & CM_SCACHEFLAG_DELETED) {
4756 osi_Log1(afsd_logp, "CALL ReleaseLock on Deleted Vnode scp 0x%p", scp);
4760 memset(&volSync, 0, sizeof(volSync));
4762 tfid.Volume = scp->fid.volume;
4763 tfid.Vnode = scp->fid.vnode;
4764 tfid.Unique = scp->fid.unique;
4767 lock_ReleaseWrite(&scp->rw);
4769 osi_Log1(afsd_logp, "CALL ReleaseLock scp 0x%p", scp);
4772 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4776 rxconnp = cm_GetRxConn(connp);
4777 code = RXAFS_ReleaseLock(rxconnp, &tfid, &volSync);
4778 rx_PutConnection(rxconnp);
4780 } while (cm_Analyze(connp, userp, reqp, &cfid, NULL, 1, NULL, &volSync,
4782 code = cm_MapRPCError(code, reqp);
4785 "CALL ReleaseLock FAILURE, code 0x%x", code);
4788 "CALL ReleaseLock SUCCESS");
4790 lock_ObtainWrite(&scp->rw);
4793 * The file server does not return a status structure so we must
4794 * locally track the file server lock count to the best of our
4798 if (scp->fsLockCount < 0)
4799 scp->fsLockCount = 0;
4802 return (code != CM_ERROR_BADFD ? code : 0);
4805 /* called with scp->rw held. May release it during processing, but
4806 will exit with lock held.
4810 - 0 if the user has permission to get the specified lock for the scp
4812 - CM_ERROR_NOACCESS if not
4814 Any other error from cm_SyncOp will be sent down untranslated.
4816 If CM_ERROR_NOACCESS is returned and lock_type is LockRead, then
4817 phas_insert (if non-NULL) will receive a boolean value indicating
4818 whether the user has INSERT permission or not.
4820 long cm_LockCheckPerms(cm_scache_t * scp,
4827 long code = 0, code2 = 0;
4829 /* lock permissions are slightly tricky because of the 'i' bit.
4830 If the user has PRSFS_LOCK, she can read-lock the file. If the
4831 user has PRSFS_WRITE, she can write-lock the file. However, if
4832 the user has PRSFS_INSERT, then she can write-lock new files,
4833 but not old ones. Since we don't have information about
4834 whether a file is new or not, we assume that if the user owns
4835 the scp, then she has the permissions that are granted by
4838 osi_Log3(afsd_logp, "cm_LockCheckPerms for scp[0x%p] type[%d] user[0x%p]",
4839 scp, lock_type, userp);
4841 if (lock_type == LockRead)
4842 rights |= PRSFS_LOCK;
4843 else if (lock_type == LockWrite)
4844 rights |= PRSFS_WRITE | PRSFS_LOCK;
4847 osi_assertx(FALSE, "invalid lock type");
4852 *phas_insert = FALSE;
4854 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
4855 CM_SCACHESYNC_GETSTATUS |
4856 CM_SCACHESYNC_NEEDCALLBACK);
4858 if (phas_insert && scp->creator == userp) {
4860 /* If this file was created by the user, then we check for
4861 PRSFS_INSERT. If the file server is recent enough, then
4862 this should be sufficient for her to get a write-lock (but
4863 not necessarily a read-lock). VICED_CAPABILITY_WRITELOCKACL
4864 indicates whether a file server supports getting write
4865 locks when the user only has PRSFS_INSERT.
4867 If the file was not created by the user we skip the check
4868 because the INSERT bit will not apply to this user even
4872 code2 = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
4873 CM_SCACHESYNC_GETSTATUS |
4874 CM_SCACHESYNC_NEEDCALLBACK);
4876 if (code2 == CM_ERROR_NOACCESS) {
4877 osi_Log0(afsd_logp, "cm_LockCheckPerms user has no INSERT bits");
4879 *phas_insert = TRUE;
4880 osi_Log0(afsd_logp, "cm_LockCheckPerms user has INSERT bits");
4884 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
4886 osi_Log1(afsd_logp, "cm_LockCheckPerms returning code %d", code);
4891 /* called with scp->rw held */
4892 long cm_Lock(cm_scache_t *scp, unsigned char sLockType,
4893 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
4895 int allowWait, cm_user_t *userp, cm_req_t *reqp,
4896 cm_file_lock_t **lockpp)
4899 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
4900 cm_file_lock_t *fileLock;
4903 int wait_unlock = FALSE;
4904 int force_client_lock = FALSE;
4906 osi_Log4(afsd_logp, "cm_Lock scp 0x%x type 0x%x offset %d length %d",
4907 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
4908 osi_Log4(afsd_logp, "... allowWait %d key <0x%x, 0x%x, 0x%x>", allowWait,
4909 key.process_id, key.session_id, key.file_id);
4912 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4914 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4917 3.1 If L->LockType is exclusive then there does NOT exist a
4918 ACCEPTED lock M in S->fileLocks such that _a_ in
4919 (M->LOffset,+M->LLength).
4921 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4922 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4923 M->LockType is shared.
4925 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4927 4.1 M->key != Key(C)
4929 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4930 and (M->LOffset,+M->LLength) do not intersect.
4933 range.offset = LOffset.QuadPart;
4934 range.length = LLength.QuadPart;
4936 lock_ObtainRead(&cm_scacheLock);
4938 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
4940 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4942 if (IS_LOCK_LOST(fileLock)) {
4943 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4944 code = CM_ERROR_BADFD;
4946 } else if (fileLock->lockType == LockWrite && INTERSECT_RANGE(range, fileLock->range)) {
4947 code = CM_ERROR_WOULDBLOCK;
4953 /* we don't need to check for deleted locks here since deleted
4954 locks are dequeued from scp->fileLocks */
4955 if (IS_LOCK_ACCEPTED(fileLock) &&
4956 INTERSECT_RANGE(range, fileLock->range)) {
4958 if ((sLockType & LOCKING_ANDX_SHARED_LOCK) == 0 ||
4959 fileLock->lockType != LockRead) {
4961 code = CM_ERROR_WOULDBLOCK;
4967 lock_ReleaseRead(&cm_scacheLock);
4969 if (code == 0 && SERVERLOCKS_ENABLED(scp)) {
4970 if (Which == scp->serverLock ||
4971 (Which == LockRead && scp->serverLock == LockWrite)) {
4975 /* we already have the lock we need */
4976 osi_Log3(afsd_logp, " we already have the correct lock. exclusives[%d], shared[%d], serverLock[%d]",
4977 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
4979 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
4981 /* special case: if we don't have permission to read-lock
4982 the file, then we force a clientside lock. This is to
4983 compensate for applications that obtain a read-lock for
4984 reading files off of directories that don't grant
4985 read-locks to the user. */
4986 if (code == CM_ERROR_NOACCESS && Which == LockRead) {
4988 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
4989 osi_Log0(afsd_logp, " User has no read-lock perms, but has INSERT perms.");
4992 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
4993 force_client_lock = TRUE;
4997 } else if ((scp->exclusiveLocks > 0) ||
4998 (scp->sharedLocks > 0 && scp->serverLock != LockRead)) {
5001 /* We are already waiting for some other lock. We should
5002 wait for the daemon to catch up instead of generating a
5003 flood of SetLock calls. */
5004 osi_Log3(afsd_logp, " already waiting for other lock. exclusives[%d], shared[%d], serverLock[%d]",
5005 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5007 /* see if we have permission to create the lock in the
5009 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
5011 code = CM_ERROR_WOULDBLOCK;
5012 else if (code == CM_ERROR_NOACCESS && Which == LockRead) {
5014 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
5016 " User has no read-lock perms, but has INSERT perms.");
5017 code = CM_ERROR_WOULDBLOCK;
5020 " User has no read-lock perms. Forcing client-side lock");
5021 force_client_lock = TRUE;
5025 /* leave any other codes as-is */
5029 int check_data_version = FALSE;
5032 /* first check if we have permission to elevate or obtain
5034 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
5036 if (code == CM_ERROR_NOACCESS && Which == LockRead &&
5037 (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp))) {
5038 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
5039 force_client_lock = TRUE;
5044 /* has_insert => (Which == LockRead, code == CM_ERROR_NOACCESS) */
5046 if (scp->serverLock == LockRead && Which == LockWrite) {
5048 /* We want to escalate the lock to a LockWrite.
5049 * Unfortunately that's not really possible without
5050 * letting go of the current lock. But for now we do
5054 " attempting to UPGRADE from LockRead to LockWrite.");
5056 " dataVersion on scp: %I64d", scp->dataVersion);
5058 /* we assume at this point (because scp->serverLock
5059 was valid) that we had a valid server lock. */
5060 scp->lockDataVersion = scp->dataVersion;
5061 check_data_version = TRUE;
5063 code = cm_IntReleaseLock(scp, userp, reqp);
5066 /* We couldn't release the lock */
5069 scp->serverLock = -1;
5073 /* We need to obtain a server lock of type Which in order
5074 * to assert this file lock */
5075 #ifndef AGGRESSIVE_LOCKS
5078 newLock = LockWrite;
5081 code = cm_IntSetLock(scp, userp, newLock, reqp);
5083 #ifdef AGGRESSIVE_LOCKS
5084 if ((code == CM_ERROR_WOULDBLOCK ||
5085 code == CM_ERROR_NOACCESS) && newLock != Which) {
5086 /* we wanted LockRead. We tried LockWrite. Now try
5091 osi_assertx(newLock == LockRead, "lock type not read");
5093 code = cm_IntSetLock(scp, userp, newLock, reqp);
5097 if (code == CM_ERROR_NOACCESS) {
5098 if (Which == LockRead) {
5099 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
5101 /* We requested a read-lock, but we have permission to
5102 * get a write-lock. Try that */
5104 tcode = cm_LockCheckPerms(scp, LockWrite, userp, reqp, NULL);
5107 newLock = LockWrite;
5109 osi_Log0(afsd_logp, " User has 'i' perms and the request was for a LockRead. Trying to get a LockWrite instead");
5111 code = cm_IntSetLock(scp, userp, newLock, reqp);
5114 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
5115 force_client_lock = TRUE;
5117 } else if (Which == LockWrite &&
5118 scp->creator == userp && !SCP_SUPPORTS_WRITELOCKACL(scp)) {
5121 /* Special case: if the lock request was for a
5122 * LockWrite and the user owns the file and we weren't
5123 * allowed to obtain the serverlock, we either lost a
5124 * race (the permissions changed from under us), or we
5125 * have 'i' bits, but we aren't allowed to lock the
5128 /* check if we lost a race... */
5129 tcode = cm_LockCheckPerms(scp, Which, userp, reqp, NULL);
5132 osi_Log0(afsd_logp, " User has 'i' perms but can't obtain write locks. Using client-side locks.");
5133 force_client_lock = TRUE;
5138 if (code == 0 && check_data_version &&
5139 scp->dataVersion != scp->lockDataVersion) {
5140 /* We lost a race. Although we successfully obtained
5141 * a lock, someone modified the file in between. The
5142 * locks have all been technically lost. */
5145 " Data version mismatch while upgrading lock.");
5147 " Data versions before=%I64d, after=%I64d",
5148 scp->lockDataVersion,
5151 " Releasing stale lock for scp 0x%x", scp);
5153 code = cm_IntReleaseLock(scp, userp, reqp);
5155 scp->serverLock = -1;
5157 code = CM_ERROR_INVAL;
5158 } else if (code == 0) {
5159 scp->serverLock = newLock;
5160 scp->lockDataVersion = scp->dataVersion;
5164 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5165 scp->serverLock == -1) {
5166 /* Oops. We lost the lock. */
5167 cm_LockMarkSCacheLost(scp);
5170 } else if (code == 0) { /* server locks not enabled */
5172 " Skipping server lock for scp");
5177 if (code != 0 && !force_client_lock) {
5178 /* Special case error translations
5180 Applications don't expect certain errors from a
5181 LockFile/UnlockFile call. We need to translate some error
5182 code to codes that apps expect and handle. */
5184 /* We shouldn't actually need to handle this case since we
5185 simulate locks for RO scps anyway. */
5186 if (code == CM_ERROR_READONLY) {
5187 osi_Log0(afsd_logp, " Reinterpreting CM_ERROR_READONLY as CM_ERROR_NOACCESS");
5188 code = CM_ERROR_NOACCESS;
5192 if (code == 0 || (code == CM_ERROR_WOULDBLOCK && allowWait) ||
5193 force_client_lock) {
5195 /* clear the error if we are forcing a client lock, so we
5196 don't get confused later. */
5197 if (force_client_lock && code != CM_ERROR_WOULDBLOCK)
5202 lock_ObtainWrite(&cm_scacheLock);
5203 fileLock = cm_GetFileLock();
5205 fileLock->fid = scp->fid;
5207 fileLock->key = key;
5208 fileLock->lockType = Which;
5209 fileLock->userp = userp;
5210 fileLock->range = range;
5211 fileLock->flags = (code == 0 ? 0 :
5213 CM_FILELOCK_FLAG_WAITUNLOCK :
5214 CM_FILELOCK_FLAG_WAITLOCK));
5216 if (force_client_lock || !SERVERLOCKS_ENABLED(scp))
5217 fileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
5219 fileLock->lastUpdate = (code == 0 && !force_client_lock) ? time(NULL) : 0;
5221 osi_QAddT(&scp->fileLocksH, &scp->fileLocksT, &fileLock->fileq);
5222 cm_HoldSCacheNoLock(scp);
5223 fileLock->scp = scp;
5224 osi_QAdd(&cm_allFileLocks, &fileLock->q);
5225 lock_ReleaseWrite(&cm_scacheLock);
5231 if (IS_LOCK_CLIENTONLY(fileLock)) {
5233 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5234 if (Which == LockRead)
5237 scp->exclusiveLocks++;
5241 "cm_Lock Lock added 0x%p flags 0x%x to scp [0x%p]",
5242 fileLock, fileLock->flags, scp);
5244 " exclusives[%d] shared[%d] client[%d] serverLock[%d]",
5245 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5246 (int)(signed char) scp->serverLock);
5249 "cm_Lock Rejecting lock (code = 0x%x)", code);
5252 /* Convert from would block to lock not granted */
5253 if (code == CM_ERROR_WOULDBLOCK)
5254 code = CM_ERROR_LOCK_NOT_GRANTED;
5260 cm_IntUnlock(cm_scache_t * scp,
5266 osi_assertx(scp->sharedLocks >= 0, "scp->sharedLocks < 0");
5267 osi_assertx(scp->exclusiveLocks >= 0, "scp->exclusiveLocks < 0");
5268 osi_assertx(scp->clientLocks >= 0, "scp->clientLocks < 0");
5270 if (!SERVERLOCKS_ENABLED(scp)) {
5271 osi_Log0(afsd_logp, " Skipping server lock for scp");
5275 /* Ideally we would go through the rest of the locks to determine
5276 * if one or more locks that were formerly in WAITUNLOCK can now
5277 * be put to ACTIVE or WAITLOCK and update scp->exclusiveLocks and
5278 * scp->sharedLocks accordingly. However, the retrying of locks
5279 * in that manner is done cm_RetryLock() manually.
5282 if (scp->serverLock == LockWrite &&
5283 scp->exclusiveLocks == 0 &&
5284 scp->sharedLocks > 0) {
5285 /* The serverLock should be downgraded to LockRead */
5286 osi_Log0(afsd_logp, " DOWNGRADE lock from LockWrite to LockRead");
5288 /* Make sure there are no dirty buffers left. */
5289 code = cm_FSync(scp, userp, reqp, TRUE);
5291 /* since scp->serverLock looked sane, we are going to assume
5292 that we have a valid server lock. */
5293 scp->lockDataVersion = scp->dataVersion;
5294 osi_Log1(afsd_logp, " dataVersion on scp = %I64d", scp->dataVersion);
5296 /* before we downgrade, make sure that we have enough
5297 permissions to get the read lock. */
5298 code = cm_LockCheckPerms(scp, LockRead, userp, reqp, NULL);
5301 osi_Log0(afsd_logp, " SKIPPING downgrade because user doesn't have perms to get downgraded lock");
5307 code = cm_IntReleaseLock(scp, userp, reqp);
5310 /* so we couldn't release it. Just let the lock be for now */
5314 scp->serverLock = -1;
5317 code = cm_IntSetLock(scp, userp, LockRead, reqp);
5319 if (code == 0 && scp->lockDataVersion == scp->dataVersion) {
5320 scp->serverLock = LockRead;
5321 } else if (code == 0 && scp->lockDataVersion != scp->dataVersion) {
5322 /* We lost a race condition. Although we have a valid
5323 lock on the file, the data has changed and essentially
5324 we have lost the lock we had during the transition. */
5326 osi_Log0(afsd_logp, "Data version mismatch during lock downgrade");
5327 osi_Log2(afsd_logp, " Data versions before=%I64d, after=%I64d",
5328 scp->lockDataVersion,
5331 code = cm_IntReleaseLock(scp, userp, reqp);
5333 code = CM_ERROR_INVAL;
5334 scp->serverLock = -1;
5338 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5339 (scp->serverLock == -1)) {
5341 cm_LockMarkSCacheLost(scp);
5344 /* failure here has no bearing on the return value of cm_Unlock() */
5347 } else if (scp->serverLock != (-1) &&
5348 scp->exclusiveLocks == 0 &&
5349 scp->sharedLocks == 0) {
5350 /* The serverLock should be released entirely */
5352 if (scp->serverLock == LockWrite) {
5353 osi_Log0(afsd_logp, " RELEASE LockWrite -> LockNone");
5355 /* Make sure there are no dirty buffers left. */
5356 code = cm_FSync(scp, userp, reqp, TRUE);
5358 osi_Log0(afsd_logp, " RELEASE LockRead -> LockNone");
5361 code = cm_IntReleaseLock(scp, userp, reqp);
5364 scp->serverLock = (-1);
5370 /* Called with scp->rw held */
5371 long cm_UnlockByKey(cm_scache_t * scp,
5378 cm_file_lock_t *fileLock;
5379 osi_queue_t *q, *qn;
5382 osi_Log4(afsd_logp, "cm_UnlockByKey scp 0x%p key <0x%x,0x%x,0x%x",
5383 scp, key.process_id, key.session_id, key.file_id);
5384 osi_Log1(afsd_logp, " flags=0x%x", flags);
5386 lock_ObtainWrite(&cm_scacheLock);
5388 for (q = scp->fileLocksH; q; q = qn) {
5391 fileLock = (cm_file_lock_t *)
5392 ((char *) q - offsetof(cm_file_lock_t, fileq));
5395 osi_Log4(afsd_logp, " Checking lock[0x%x] range[%d,+%d] type[%d]",
5397 (unsigned long) fileLock->range.offset,
5398 (unsigned long) fileLock->range.length,
5399 fileLock->lockType);
5400 osi_Log4(afsd_logp, " key<0x%x, 0x%x, 0x%x> flags[0x%x]",
5401 fileLock->key.process_id, fileLock->key.session_id, fileLock->key.file_id,
5404 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5405 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5406 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5408 fileLock->fid.volume,
5409 fileLock->fid.vnode,
5410 fileLock->fid.unique);
5411 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5412 fileLock->scp->fid.cell,
5413 fileLock->scp->fid.volume,
5414 fileLock->scp->fid.vnode,
5415 fileLock->scp->fid.unique);
5416 osi_assertx(FALSE, "invalid fid value");
5420 if (!IS_LOCK_DELETED(fileLock) &&
5421 cm_KeyEquals(&fileLock->key, &key, flags)) {
5422 osi_Log3(afsd_logp, "...Unlock range [%d,+%d] type %d",
5423 fileLock->range.offset,
5424 fileLock->range.length,
5425 fileLock->lockType);
5427 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5429 if (IS_LOCK_CLIENTONLY(fileLock)) {
5431 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5432 if (fileLock->lockType == LockRead)
5435 scp->exclusiveLocks--;
5438 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5440 cm_ReleaseUser(fileLock->userp);
5441 cm_ReleaseSCacheNoLock(scp);
5443 fileLock->userp = NULL;
5444 fileLock->scp = NULL;
5450 lock_ReleaseWrite(&cm_scacheLock);
5452 if (n_unlocks == 0) {
5453 osi_Log0(afsd_logp, "cm_UnlockByKey no locks found");
5454 osi_Log3(afsd_logp, " Leaving scp with exclusives[%d], shared[%d], serverLock[%d]",
5455 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5460 code = cm_IntUnlock(scp, userp, reqp);
5461 osi_Log1(afsd_logp, "cm_UnlockByKey code 0x%x", code);
5463 osi_Log4(afsd_logp, " Leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5464 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5465 (int)(signed char) scp->serverLock);
5470 /* Called with scp->rw held */
5471 long cm_Unlock(cm_scache_t *scp,
5472 unsigned char sLockType,
5473 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
5480 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
5481 cm_file_lock_t *fileLock;
5483 int release_userp = FALSE;
5484 int exact_match = !(flags & CM_UNLOCK_FLAG_MATCH_RANGE);
5486 LARGE_INTEGER RangeEnd;
5488 osi_Log4(afsd_logp, "cm_Unlock scp 0x%p type 0x%x offset 0x%x length 0x%x",
5489 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
5490 osi_Log4(afsd_logp, "... key <0x%x,0x%x,0x%x> flags 0x%x",
5491 key.process_id, key.session_id, key.file_id, flags);
5494 RangeEnd.QuadPart = LOffset.QuadPart + LLength.QuadPart;
5497 lock_ObtainRead(&cm_scacheLock);
5499 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5500 fileLock = (cm_file_lock_t *)
5501 ((char *) q - offsetof(cm_file_lock_t, fileq));
5504 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5505 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5506 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5508 fileLock->fid.volume,
5509 fileLock->fid.vnode,
5510 fileLock->fid.unique);
5511 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5512 fileLock->scp->fid.cell,
5513 fileLock->scp->fid.volume,
5514 fileLock->scp->fid.vnode,
5515 fileLock->scp->fid.unique);
5516 osi_assertx(FALSE, "invalid fid value");
5520 if (!IS_LOCK_DELETED(fileLock) &&
5521 cm_KeyEquals(&fileLock->key, &key, 0) &&
5522 fileLock->range.offset == LOffset.QuadPart &&
5523 fileLock->range.length == LLength.QuadPart) {
5529 if (!IS_LOCK_DELETED(fileLock) &&
5530 cm_KeyEquals(&fileLock->key, &key, 0) &&
5531 fileLock->range.offset >= LOffset.QuadPart &&
5532 fileLock->range.offset < RangeEnd.QuadPart &&
5533 (fileLock->range.offset + fileLock->range.length) <= RangeEnd.QuadPart) {
5541 lock_ReleaseRead(&cm_scacheLock);
5543 if (lock_found && !exact_match) {
5547 osi_Log0(afsd_logp, "cm_Unlock lock not found; failure");
5549 /* The lock didn't exist anyway. *shrug* */
5550 return CM_ERROR_RANGE_NOT_LOCKED;
5554 /* discard lock record */
5555 lock_ConvertRToW(&cm_scacheLock);
5556 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5559 * Don't delete it here; let the daemon delete it, to simplify
5560 * the daemon's traversal of the list.
5563 if (IS_LOCK_CLIENTONLY(fileLock)) {
5565 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5566 if (fileLock->lockType == LockRead)
5569 scp->exclusiveLocks--;
5572 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5574 if (userp != NULL) {
5575 cm_ReleaseUser(fileLock->userp);
5577 userp = fileLock->userp;
5578 release_userp = TRUE;
5580 cm_ReleaseSCacheNoLock(scp);
5581 fileLock->userp = NULL;
5582 fileLock->scp = NULL;
5583 lock_ReleaseWrite(&cm_scacheLock);
5585 code = cm_IntUnlock(scp, userp, reqp);
5587 if (release_userp) {
5588 cm_ReleaseUser(userp);
5589 release_userp = FALSE;
5593 osi_Log1(afsd_logp, "cm_Unlock not exact match, searching for next lock, code 0x%x", code);
5594 goto try_again; /* might be more than one lock in the range */
5599 osi_Log1(afsd_logp, "cm_Unlock code 0x%x", code);
5600 osi_Log4(afsd_logp, " leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5601 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5602 (int)(signed char) scp->serverLock);
5607 /* called with scp->rw held */
5608 void cm_LockMarkSCacheLost(cm_scache_t * scp)
5610 cm_file_lock_t *fileLock;
5613 osi_Log1(afsd_logp, "cm_LockMarkSCacheLost scp 0x%x", scp);
5615 /* cm_scacheLock needed because we are modifying fileLock->flags */
5616 lock_ObtainWrite(&cm_scacheLock);
5618 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5620 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
5622 if (IS_LOCK_ACTIVE(fileLock) &&
5623 !IS_LOCK_CLIENTONLY(fileLock)) {
5624 if (fileLock->lockType == LockRead)
5627 scp->exclusiveLocks--;
5629 fileLock->flags |= CM_FILELOCK_FLAG_LOST;
5633 scp->serverLock = -1;
5634 scp->lockDataVersion = CM_SCACHE_VERSION_BAD;
5635 lock_ReleaseWrite(&cm_scacheLock);
5638 /* Called with no relevant locks held */
5639 void cm_CheckLocks()
5641 osi_queue_t *q, *nq;
5642 cm_file_lock_t *fileLock;
5648 struct rx_connection * rxconnp;
5651 memset(&volSync, 0, sizeof(volSync));
5655 lock_ObtainWrite(&cm_scacheLock);
5657 cm_lockRefreshCycle++;
5659 osi_Log1(afsd_logp, "cm_CheckLocks starting lock check cycle %d", cm_lockRefreshCycle);
5661 for (q = cm_allFileLocks; q; q = nq) {
5662 fileLock = (cm_file_lock_t *) q;
5666 if (IS_LOCK_DELETED(fileLock)) {
5667 cm_user_t *userp = fileLock->userp;
5668 cm_scache_t *scp = fileLock->scp;
5669 fileLock->userp = NULL;
5670 fileLock->scp = NULL;
5673 lock_ReleaseWrite(&cm_scacheLock);
5674 lock_ObtainWrite(&scp->rw);
5675 code = cm_IntUnlock(scp, userp, &req);
5676 lock_ReleaseWrite(&scp->rw);
5678 cm_ReleaseUser(userp);
5679 lock_ObtainWrite(&cm_scacheLock);
5680 cm_ReleaseSCacheNoLock(scp);
5682 osi_QRemove(&cm_allFileLocks, q);
5683 cm_PutFileLock(fileLock);
5685 } else if (IS_LOCK_ACTIVE(fileLock) && !IS_LOCK_CLIENTONLY(fileLock)) {
5687 /* Server locks must have been enabled for us to have
5688 received an active non-client-only lock. */
5689 osi_assertx(cm_enableServerLocks, "!cm_enableServerLocks");
5691 scp = fileLock->scp;
5692 osi_assertx(scp != NULL, "null cm_scache_t");
5694 cm_HoldSCacheNoLock(scp);
5697 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5698 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5699 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5701 fileLock->fid.volume,
5702 fileLock->fid.vnode,
5703 fileLock->fid.unique);
5704 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5705 fileLock->scp->fid.cell,
5706 fileLock->scp->fid.volume,
5707 fileLock->scp->fid.vnode,
5708 fileLock->scp->fid.unique);
5709 osi_assertx(FALSE, "invalid fid");
5712 /* Server locks are extended once per scp per refresh
5714 if (scp->lastRefreshCycle != cm_lockRefreshCycle) {
5716 int scp_done = FALSE;
5718 osi_Log1(afsd_logp, "cm_CheckLocks Updating scp 0x%x", scp);
5720 lock_ReleaseWrite(&cm_scacheLock);
5721 lock_ObtainWrite(&scp->rw);
5723 /* did the lock change while we weren't holding the lock? */
5724 if (!IS_LOCK_ACTIVE(fileLock))
5725 goto post_syncopdone;
5727 code = cm_SyncOp(scp, NULL, fileLock->userp, &req, 0,
5728 CM_SCACHESYNC_NEEDCALLBACK
5729 | CM_SCACHESYNC_GETSTATUS
5730 | CM_SCACHESYNC_LOCK);
5734 "cm_CheckLocks SyncOp failure code 0x%x", code);
5735 goto post_syncopdone;
5738 /* cm_SyncOp releases scp->rw during which the lock
5739 may get released. */
5740 if (!IS_LOCK_ACTIVE(fileLock))
5741 goto pre_syncopdone;
5743 if (scp->serverLock != -1 && !(scp->flags & CM_SCACHEFLAG_DELETED)) {
5747 tfid.Volume = scp->fid.volume;
5748 tfid.Vnode = scp->fid.vnode;
5749 tfid.Unique = scp->fid.unique;
5751 userp = fileLock->userp;
5753 osi_Log3(afsd_logp, "CALL ExtendLock lock 0x%p for scp=0x%p with lock %d",
5756 (int) scp->serverLock);
5758 lock_ReleaseWrite(&scp->rw);
5761 code = cm_ConnFromFID(&cfid, userp,
5766 rxconnp = cm_GetRxConn(connp);
5767 code = RXAFS_ExtendLock(rxconnp, &tfid,
5769 rx_PutConnection(rxconnp);
5771 osi_Log1(afsd_logp, " ExtendLock returns %d", code);
5773 } while (cm_Analyze(connp, userp, &req,
5774 &cfid, NULL, 1, NULL, &volSync, NULL, NULL,
5777 code = cm_MapRPCError(code, &req);
5779 lock_ObtainWrite(&scp->rw);
5782 osi_Log1(afsd_logp, "CALL ExtendLock FAILURE, code 0x%x", code);
5783 scp->fsLockCount = 0;
5785 osi_Log0(afsd_logp, "CALL ExtendLock SUCCESS");
5786 scp->lockDataVersion = scp->dataVersion;
5789 if ((code == EINVAL || code == CM_ERROR_INVAL) &&
5790 scp->lockDataVersion == scp->dataVersion) {
5794 (scp->exclusiveLocks > 0) ? LockWrite: LockRead;
5796 /* we might still have a chance to obtain a
5799 code = cm_IntSetLock(scp, userp, lockType, &req);
5802 code = CM_ERROR_INVAL;
5803 } else if (scp->lockDataVersion != scp->dataVersion) {
5805 /* now check if we still have the file at
5806 the right data version. */
5808 "Data version mismatch on scp 0x%p",
5811 " Data versions: before=%I64d, after=%I64d",
5812 scp->lockDataVersion,
5815 code = cm_IntReleaseLock(scp, userp, &req);
5817 code = CM_ERROR_INVAL;
5821 if (code == EINVAL || code == CM_ERROR_INVAL ||
5822 code == CM_ERROR_BADFD) {
5823 cm_LockMarkSCacheLost(scp);
5827 /* interestingly, we have found an active lock
5828 belonging to an scache that has no
5830 cm_LockMarkSCacheLost(scp);
5837 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
5840 lock_ReleaseWrite(&scp->rw);
5842 lock_ObtainWrite(&cm_scacheLock);
5845 fileLock->lastUpdate = time(NULL);
5849 scp->lastRefreshCycle = cm_lockRefreshCycle;
5852 /* we have already refreshed the locks on this scp */
5853 fileLock->lastUpdate = time(NULL);
5856 cm_ReleaseSCacheNoLock(scp);
5858 } else if (IS_LOCK_ACTIVE(fileLock) && IS_LOCK_CLIENTONLY(fileLock)) {
5859 /* TODO: Check callbacks */
5863 lock_ReleaseWrite(&cm_scacheLock);
5864 osi_Log1(afsd_logp, "cm_CheckLocks completes lock check cycle %d", cm_lockRefreshCycle);
5867 /* NOT called with scp->rw held. */
5868 long cm_RetryLock(cm_file_lock_t *oldFileLock, int client_is_dead)
5871 cm_scache_t *scp = NULL;
5872 cm_file_lock_t *fileLock;
5876 int force_client_lock = FALSE;
5877 int has_insert = FALSE;
5878 int check_data_version = FALSE;
5882 if (client_is_dead) {
5883 code = CM_ERROR_TIMEDOUT;
5887 lock_ObtainRead(&cm_scacheLock);
5889 osi_Log2(afsd_logp, "cm_RetryLock checking lock %p (scp=%p)", oldFileLock, oldFileLock->scp);
5890 osi_Log4(afsd_logp, " offset(%x:%x) length(%x:%x)",
5891 (unsigned)(oldFileLock->range.offset >> 32),
5892 (unsigned)(oldFileLock->range.offset & 0xffffffff),
5893 (unsigned)(oldFileLock->range.length >> 32),
5894 (unsigned)(oldFileLock->range.length & 0xffffffff));
5895 osi_Log4(afsd_logp, " key<0x%x,0x%x,0x%x> flags=%x",
5896 oldFileLock->key.process_id, oldFileLock->key.session_id, oldFileLock->key.file_id,
5897 (unsigned)(oldFileLock->flags));
5899 /* if the lock has already been granted, then we have nothing to do */
5900 if (IS_LOCK_ACTIVE(oldFileLock)) {
5901 lock_ReleaseRead(&cm_scacheLock);
5902 osi_Log0(afsd_logp, "cm_RetryLock lock already granted");
5906 /* we can't do anything with lost or deleted locks at the moment. */
5907 if (IS_LOCK_LOST(oldFileLock) || IS_LOCK_DELETED(oldFileLock)) {
5908 code = CM_ERROR_BADFD;
5909 osi_Log0(afsd_logp, "cm_RetryLock lock is lost or deleted");
5910 lock_ReleaseRead(&cm_scacheLock);
5914 scp = oldFileLock->scp;
5916 osi_assertx(scp != NULL, "null cm_scache_t");
5918 lock_ReleaseRead(&cm_scacheLock);
5919 lock_ObtainWrite(&scp->rw);
5921 code = cm_LockCheckPerms(scp, oldFileLock->lockType,
5925 if (code == CM_ERROR_NOACCESS && oldFileLock->lockType == LockRead) {
5926 if (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp)) {
5927 force_client_lock = TRUE;
5931 lock_ReleaseWrite(&scp->rw);
5935 lock_ObtainWrite(&cm_scacheLock);
5937 /* Check if we already have a sufficient server lock to allow this
5938 lock to go through. */
5939 if (IS_LOCK_WAITLOCK(oldFileLock) &&
5940 (!SERVERLOCKS_ENABLED(scp) ||
5941 scp->serverLock == oldFileLock->lockType ||
5942 scp->serverLock == LockWrite)) {
5944 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5946 if (SERVERLOCKS_ENABLED(scp)) {
5947 osi_Log1(afsd_logp, "cm_RetryLock Server lock (%d) is sufficient for lock. Granting",
5948 (int) scp->serverLock);
5950 osi_Log0(afsd_logp, "cm_RetryLock skipping server lock for scp");
5953 lock_ReleaseWrite(&cm_scacheLock);
5954 lock_ReleaseWrite(&scp->rw);
5959 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
5961 /* check if the conflicting locks have dissappeared already */
5962 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5964 fileLock = (cm_file_lock_t *)
5965 ((char *) q - offsetof(cm_file_lock_t, fileq));
5967 if (IS_LOCK_LOST(fileLock)) {
5968 if (cm_KeyEquals(&fileLock->key, &oldFileLock->key, 0)) {
5969 code = CM_ERROR_BADFD;
5970 oldFileLock->flags |= CM_FILELOCK_FLAG_LOST;
5971 osi_Log1(afsd_logp, " found lost lock %p for same key. Marking lock as lost",
5974 } else if (fileLock->lockType == LockWrite &&
5975 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
5976 osi_Log1(afsd_logp, " found conflicting LOST lock %p", fileLock);
5977 code = CM_ERROR_WOULDBLOCK;
5982 if (IS_LOCK_ACCEPTED(fileLock) &&
5983 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
5985 if (oldFileLock->lockType != LockRead ||
5986 fileLock->lockType != LockRead) {
5988 osi_Log1(afsd_logp, " found conflicting lock %p", fileLock);
5989 code = CM_ERROR_WOULDBLOCK;
5997 lock_ReleaseWrite(&cm_scacheLock);
5998 lock_ReleaseWrite(&scp->rw);
6003 /* when we get here, the lock is either a WAITUNLOCK or WAITLOCK.
6004 If it is WAITUNLOCK, then we didn't find any conflicting lock
6005 but we haven't verfied whether the serverLock is sufficient to
6006 assert it. If it is WAITLOCK, then the serverLock is
6007 insufficient to assert it. Eitherway, we are ready to accept
6008 the lock as either ACTIVE or WAITLOCK depending on the
6011 /* First, promote the WAITUNLOCK to a WAITLOCK */
6012 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
6013 if (oldFileLock->lockType == LockRead)
6016 scp->exclusiveLocks++;
6018 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITUNLOCK;
6019 oldFileLock->flags |= CM_FILELOCK_FLAG_WAITLOCK;
6022 osi_assertx(IS_LOCK_WAITLOCK(oldFileLock), "!IS_LOCK_WAITLOCK");
6024 if (force_client_lock ||
6025 !SERVERLOCKS_ENABLED(scp) ||
6026 scp->serverLock == oldFileLock->lockType ||
6027 (oldFileLock->lockType == LockRead &&
6028 scp->serverLock == LockWrite)) {
6030 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
6032 if ((force_client_lock ||
6033 !SERVERLOCKS_ENABLED(scp)) &&
6034 !IS_LOCK_CLIENTONLY(oldFileLock)) {
6036 oldFileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
6038 if (oldFileLock->lockType == LockRead)
6041 scp->exclusiveLocks--;
6046 lock_ReleaseWrite(&cm_scacheLock);
6047 lock_ReleaseWrite(&scp->rw);
6054 code = cm_SyncOp(scp, NULL, oldFileLock->userp, &req, 0,
6055 CM_SCACHESYNC_NEEDCALLBACK
6056 | CM_SCACHESYNC_GETSTATUS
6057 | CM_SCACHESYNC_LOCK);
6059 osi_Log1(afsd_logp, "cm_RetryLock SyncOp failure code 0x%x", code);
6060 lock_ReleaseWrite(&cm_scacheLock);
6061 goto post_syncopdone;
6064 if (!IS_LOCK_WAITLOCK(oldFileLock))
6065 goto pre_syncopdone;
6067 userp = oldFileLock->userp;
6069 #ifndef AGGRESSIVE_LOCKS
6070 newLock = oldFileLock->lockType;
6072 newLock = LockWrite;
6076 /* if has_insert is non-zero, then:
6077 - the lock a LockRead
6078 - we don't have permission to get a LockRead
6079 - we do have permission to get a LockWrite
6080 - the server supports VICED_CAPABILITY_WRITELOCKACL
6083 newLock = LockWrite;
6086 lock_ReleaseWrite(&cm_scacheLock);
6088 /* when we get here, either we have a read-lock and want a
6089 write-lock or we don't have any locks and we want some
6092 if (scp->serverLock == LockRead) {
6094 osi_assertx(newLock == LockWrite, "!LockWrite");
6096 osi_Log0(afsd_logp, " Attempting to UPGRADE from LockRead to LockWrite");
6098 scp->lockDataVersion = scp->dataVersion;
6099 check_data_version = TRUE;
6101 code = cm_IntReleaseLock(scp, userp, &req);
6104 goto pre_syncopdone;
6106 scp->serverLock = -1;
6109 code = cm_IntSetLock(scp, userp, newLock, &req);
6112 if (scp->dataVersion != scp->lockDataVersion) {
6113 /* we lost a race. too bad */
6116 " Data version mismatch while upgrading lock.");
6118 " Data versions before=%I64d, after=%I64d",
6119 scp->lockDataVersion,
6122 " Releasing stale lock for scp 0x%x", scp);
6124 code = cm_IntReleaseLock(scp, userp, &req);
6126 scp->serverLock = -1;
6128 code = CM_ERROR_INVAL;
6130 cm_LockMarkSCacheLost(scp);
6132 scp->serverLock = newLock;
6137 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
6143 if (code != 0 && code != CM_ERROR_WOULDBLOCK) {
6144 lock_ObtainWrite(&cm_scacheLock);
6145 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, &oldFileLock->fileq);
6146 lock_ReleaseWrite(&cm_scacheLock);
6148 lock_ReleaseWrite(&scp->rw);
6151 lock_ObtainWrite(&cm_scacheLock);
6153 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
6154 } else if (code != CM_ERROR_WOULDBLOCK) {
6155 oldFileLock->flags |= CM_FILELOCK_FLAG_DELETED;
6156 cm_ReleaseUser(oldFileLock->userp);
6157 oldFileLock->userp = NULL;
6158 if (oldFileLock->scp) {
6159 cm_ReleaseSCacheNoLock(oldFileLock->scp);
6160 oldFileLock->scp = NULL;
6163 lock_ReleaseWrite(&cm_scacheLock);
6168 cm_key_t cm_GenerateKey(afs_uint16 session_id, afs_offs_t process_id, afs_uint64 file_id)
6172 key.process_id = process_id;
6173 key.session_id = session_id;
6174 key.file_id = file_id;
6179 int cm_KeyEquals(cm_key_t *k1, cm_key_t *k2, int flags)
6181 return (k1->session_id == k2->session_id) && (k1->file_id == k2->file_id) &&
6182 ((flags & CM_UNLOCK_FLAG_BY_FID) || (k1->process_id == k2->process_id));
6185 void cm_ReleaseAllLocks(void)
6191 cm_file_lock_t *fileLock;
6194 for (i = 0; i < cm_data.scacheHashTableSize; i++)
6196 for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
6197 while (scp->fileLocksH != NULL) {
6198 lock_ObtainWrite(&scp->rw);
6199 lock_ObtainWrite(&cm_scacheLock);
6200 if (!scp->fileLocksH) {
6201 lock_ReleaseWrite(&cm_scacheLock);
6202 lock_ReleaseWrite(&scp->rw);
6205 fileLock = (cm_file_lock_t *)((char *) scp->fileLocksH - offsetof(cm_file_lock_t, fileq));
6206 userp = fileLock->userp;
6208 key = fileLock->key;
6209 cm_HoldSCacheNoLock(scp);
6210 lock_ReleaseWrite(&cm_scacheLock);
6211 cm_UnlockByKey(scp, key, 0, userp, &req);
6212 cm_ReleaseSCache(scp);
6213 cm_ReleaseUser(userp);
6214 lock_ReleaseWrite(&scp->rw);