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, 0, &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, 0, &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];
863 afs_uint32 bytesRead = 0;
865 /* otherwise, we have to read it in */
866 offset.LowPart = offset.HighPart = 0;
867 code = cm_GetData(scp, &offset, temp, MOUNTPOINTLEN, &bytesRead, userp, reqp);
872 * scp->length is the actual length of the mount point string.
873 * It is current because cm_GetData merged the most up to date
874 * status info into scp and has not dropped the rwlock since.
876 if (scp->length.LowPart > MOUNTPOINTLEN - 1) {
877 code = CM_ERROR_TOOBIG;
881 if (scp->length.LowPart == 0) {
882 code = CM_ERROR_INVAL;
886 /* convert the terminating dot to a NUL */
887 temp[scp->length.LowPart - 1] = 0;
888 memcpy(scp->mountPointStringp, temp, scp->length.LowPart);
889 scp->mpDataVersion = scp->dataVersion;
893 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHDATA);
899 /* called with a locked scp and chases the mount point, yielding outScpp.
900 * scp remains write locked, just for simplicity of describing the interface.
902 long cm_FollowMountPoint(cm_scache_t *scp, cm_scache_t *dscp, cm_user_t *userp,
903 cm_req_t *reqp, cm_scache_t **outScpp)
905 fschar_t *cellNamep = NULL;
906 fschar_t *volNamep = NULL;
910 cm_volume_t *volp = NULL;
919 if (scp->mountRootFid.cell != 0 && scp->mountRootGen >= cm_data.mountRootGen) {
920 tfid = scp->mountRootFid;
921 lock_ReleaseWrite(&scp->rw);
922 code = cm_GetSCache(&tfid, NULL, outScpp, userp, reqp);
923 lock_ObtainWrite(&scp->rw);
927 /* parse the volume name */
928 mpNamep = scp->mountPointStringp;
930 return CM_ERROR_NOSUCHPATH;
931 mtType = *scp->mountPointStringp;
933 cp = cm_FsStrChr(mpNamep, _FS(':'));
935 /* cellular mount point */
936 cellNamep = (fschar_t *)malloc((cp - mpNamep) * sizeof(fschar_t));
937 cm_FsStrCpyN(cellNamep, cp - mpNamep, mpNamep + 1, cp - mpNamep - 1);
938 volNamep = cm_FsStrDup(cp+1);
940 /* now look up the cell */
941 lock_ReleaseWrite(&scp->rw);
942 cellp = cm_GetCell(cellNamep, CM_FLAG_CREATE|CM_FLAG_NOPROBE);
943 lock_ObtainWrite(&scp->rw);
946 volNamep = cm_FsStrDup(mpNamep + 1);
948 #ifdef AFS_FREELANCE_CLIENT
950 * Mount points in the Freelance cell should default
951 * to the workstation cell.
953 if (cm_freelanceEnabled &&
954 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
955 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
957 fschar_t rootCellName[256]="";
958 cm_GetRootCellName(rootCellName);
959 cellp = cm_GetCell(rootCellName, 0);
961 #endif /* AFS_FREELANCE_CLIENT */
962 cellp = cm_FindCellByID(scp->fid.cell, 0);
966 code = CM_ERROR_NOSUCHCELL;
970 vnLength = cm_FsStrLen(volNamep);
971 if (vnLength >= 8 && cm_FsStrCmp(volNamep + vnLength - 7, ".backup") == 0)
972 targetType = BACKVOL;
973 else if (vnLength >= 10
974 && cm_FsStrCmp(volNamep + vnLength - 9, ".readonly") == 0)
979 /* check for backups within backups */
980 if (targetType == BACKVOL
981 && (scp->flags & (CM_SCACHEFLAG_RO | CM_SCACHEFLAG_PURERO))
982 == CM_SCACHEFLAG_RO) {
983 code = CM_ERROR_TOO_MANY_SYMLINKS;
987 /* now we need to get the volume */
988 lock_ReleaseWrite(&scp->rw);
989 if (cm_VolNameIsID(volNamep)) {
990 code = cm_FindVolumeByID(cellp, atoi(volNamep), userp, reqp,
991 CM_GETVOL_FLAG_CREATE, &volp);
993 code = cm_FindVolumeByName(cellp, volNamep, userp, reqp,
994 CM_GETVOL_FLAG_CREATE, &volp);
996 lock_ObtainWrite(&scp->rw);
999 afs_uint32 cell, volume;
1000 cm_vol_state_t *statep;
1002 cell = cellp->cellID;
1004 /* if the mt pt originates in a .backup volume (not a .readonly)
1005 * and FollowBackupPath is active, and if there is a .backup
1006 * volume for the target, then use the .backup of the target
1007 * instead of the read-write.
1009 if (cm_followBackupPath &&
1010 volp->vol[BACKVOL].ID != 0 &&
1011 (dscp->flags & (CM_SCACHEFLAG_RO|CM_SCACHEFLAG_PURERO)) == CM_SCACHEFLAG_RO &&
1012 (targetType == RWVOL || targetType == ROVOL && volp->vol[ROVOL].ID == 0)
1014 targetType = BACKVOL;
1016 /* if the mt pt is in a read-only volume (not just a
1017 * backup), and if there is a read-only volume for the
1018 * target, and if this is a targetType '#' mount point, use
1019 * the read-only, otherwise use the one specified.
1021 else if (mtType == '#' && targetType == RWVOL &&
1022 (scp->flags & CM_SCACHEFLAG_PURERO) &&
1023 volp->vol[ROVOL].ID != 0) {
1027 lock_ObtainWrite(&volp->rw);
1028 statep = cm_VolumeStateByType(volp, targetType);
1029 volume = statep->ID;
1030 statep->dotdotFid = dscp->fid;
1031 lock_ReleaseWrite(&volp->rw);
1033 /* the rest of the fid is a magic number */
1034 cm_SetFid(&scp->mountRootFid, cell, volume, 1, 1);
1035 scp->mountRootGen = cm_data.mountRootGen;
1037 tfid = scp->mountRootFid;
1038 lock_ReleaseWrite(&scp->rw);
1039 code = cm_GetSCache(&tfid, NULL, outScpp, userp, reqp);
1040 lock_ObtainWrite(&scp->rw);
1053 long cm_LookupInternal(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_user_t *userp,
1054 cm_req_t *reqp, cm_scache_t **outScpp)
1057 int dnlcHit = 1; /* did we hit in the dnlc? yes, we did */
1058 cm_scache_t *tscp = NULL;
1059 cm_scache_t *mountedScp;
1060 cm_lookupSearch_t rock;
1062 normchar_t *nnamep = NULL;
1063 fschar_t *fnamep = NULL;
1068 memset(&rock, 0, sizeof(rock));
1070 if (dscp->fid.vnode == 1 && dscp->fid.unique == 1
1071 && cm_ClientStrCmp(cnamep, _C("..")) == 0) {
1072 if (dscp->dotdotFid.volume == 0)
1073 return CM_ERROR_NOSUCHVOLUME;
1074 rock.fid = dscp->dotdotFid;
1076 } else if (cm_ClientStrCmp(cnamep, _C(".")) == 0) {
1077 rock.fid = dscp->fid;
1081 nnamep = cm_ClientStringToNormStringAlloc(cnamep, -1, NULL);
1083 code = CM_ERROR_NOSUCHFILE;
1086 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
1088 code = CM_ERROR_NOSUCHFILE;
1093 if (flags & CM_FLAG_NOMOUNTCHASE) {
1094 /* In this case, we should go and call cm_Dir* functions
1095 directly since the following cm_ApplyDir() function will
1103 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
1104 CM_DIROP_FLAG_NONE, &dirop);
1107 code = cm_BPlusDirLookup(&dirop, nnamep, &rock.fid);
1112 code = cm_DirLookup(&dirop, fnamep, &rock.fid);
1114 cm_EndDirOp(&dirop);
1124 if (code == CM_ERROR_INEXACT_MATCH && (flags & CM_FLAG_CASEFOLD)) {
1131 code = CM_ERROR_BPLUS_NOMATCH;
1137 rock.fid.cell = dscp->fid.cell;
1138 rock.fid.volume = dscp->fid.volume;
1139 rock.searchNamep = fnamep;
1140 rock.nsearchNamep = nnamep;
1141 rock.caseFold = (flags & CM_FLAG_CASEFOLD);
1142 rock.hasTilde = ((cm_ClientStrChr(cnamep, '~') != NULL) ? 1 : 0);
1144 /* If NOMOUNTCHASE, bypass DNLC by passing NULL scp pointer */
1145 code = cm_ApplyDir(dscp, cm_LookupSearchProc, &rock, NULL, userp, reqp,
1146 (flags & CM_FLAG_NOMOUNTCHASE) ? NULL : &tscp);
1148 /* code == 0 means we fell off the end of the dir, while stopnow means
1149 * that we stopped early, probably because we found the entry we're
1150 * looking for. Any other non-zero code is an error.
1152 if (code && code != CM_ERROR_STOPNOW) {
1153 /* if the cm_scache_t we are searching in is not a directory
1154 * we must return path not found because the error
1155 * is to describe the final component not an intermediary
1157 if (code == CM_ERROR_NOTDIR) {
1158 if (flags & CM_FLAG_CHECKPATH)
1159 code = CM_ERROR_NOSUCHPATH;
1161 code = CM_ERROR_NOSUCHFILE;
1167 getroot = (dscp==cm_data.rootSCachep) ;
1169 if (!(cm_freelanceEnabled && cm_freelanceDiscovery) || !getroot) {
1170 if (flags & CM_FLAG_CHECKPATH)
1171 code = CM_ERROR_NOSUCHPATH;
1173 code = CM_ERROR_NOSUCHFILE;
1176 else if (!cm_ClientStrChr(cnamep, '#') &&
1177 !cm_ClientStrChr(cnamep, '%') &&
1178 cm_ClientStrCmpI(cnamep, _C("srvsvc")) &&
1179 cm_ClientStrCmpI(cnamep, _C("wkssvc")) &&
1180 cm_ClientStrCmpI(cnamep, _C("ipc$")))
1182 /* nonexistent dir on freelance root, so add it */
1183 fschar_t fullname[CELL_MAXNAMELEN + 1] = "."; /* +1 so that when we skip the . the size is still CELL_MAXNAMELEN */
1187 osi_Log1(afsd_logp,"cm_Lookup adding mount for non-existent directory: %S",
1188 osi_LogSaveClientString(afsd_logp,cnamep));
1191 * There is an ugly behavior where a share name "foo" will be searched
1192 * for as "fo". If the searched for name differs by an already existing
1193 * symlink or mount point in the Freelance directory, do not add the
1194 * new value automatically.
1198 fnlen = strlen(fnamep);
1199 if ( fnamep[fnlen-1] == '.') {
1200 fnamep[fnlen-1] = '\0';
1205 if (cnamep[0] == '.') {
1206 if (cm_GetCell_Gen(&fnamep[1], &fullname[1], CM_FLAG_CREATE)) {
1208 code = cm_FreelanceAddMount(fullname, &fullname[1], "root.cell", 1, &rock.fid);
1209 if ( cm_FsStrCmpI(&fnamep[1], &fullname[1])) {
1211 * Do not permit symlinks that are one of:
1212 * . the cellname followed by a dot
1213 * . the cellname minus a single character
1214 * . a substring of the cellname that does not consist of full components
1216 if ( cm_strnicmp_utf8(&fnamep[1], fullname, (int)fnlen-1) == 0 &&
1217 (fnlen-1 == strlen(fullname)-1 || fullname[fnlen-1] != '.'))
1219 /* do not add; substitute fullname for the search */
1221 fnamep = malloc(strlen(fullname)+2);
1223 strncpy(&fnamep[1], fullname, strlen(fullname)+1);
1226 code = cm_FreelanceAddSymlink(fnamep, fullname, &rock.fid);
1231 if (cm_GetCell_Gen(fnamep, fullname, CM_FLAG_CREATE)) {
1233 code = cm_FreelanceAddMount(fullname, fullname, "root.cell", 0, &rock.fid);
1234 if ( cm_FsStrCmpI(fnamep, fullname)) {
1236 * Do not permit symlinks that are one of:
1237 * . the cellname followed by a dot
1238 * . the cellname minus a single character
1239 * . a substring of the cellname that does not consist of full components
1241 if ( cm_strnicmp_utf8(fnamep, fullname, (int)fnlen-1) == 0 &&
1242 (fnlen == strlen(fullname)-1 || fullname[fnlen] != '.'))
1244 /* do not add; substitute fullname for the search */
1246 fnamep = strdup(fullname);
1250 code = cm_FreelanceAddSymlink(fnamep, fullname, &rock.fid);
1259 nnamep = cm_FsStringToNormStringAlloc(fnamep, -1, NULL);
1263 if (!found || code) { /* add mount point failed, so give up */
1264 if (flags & CM_FLAG_CHECKPATH)
1265 code = CM_ERROR_NOSUCHPATH;
1267 code = CM_ERROR_NOSUCHFILE;
1270 tscp = NULL; /* to force call of cm_GetSCache */
1272 if (flags & CM_FLAG_CHECKPATH)
1273 code = CM_ERROR_NOSUCHPATH;
1275 code = CM_ERROR_NOSUCHFILE;
1281 if ( !tscp ) /* we did not find it in the dnlc */
1284 code = cm_GetSCache(&rock.fid, &dscp->fid, &tscp, userp, reqp);
1288 /* tscp is now held */
1290 lock_ObtainWrite(&tscp->rw);
1293 * Do not get status if we do not already have a callback or know the type.
1294 * The process of reading the mount point string will obtain status information
1295 * in a single RPC. No reason to add a second round trip.
1297 * If we do have a callback, use cm_SyncOp to get status in case the
1298 * current cm_user_t is not the same as the one that obtained the
1299 * mount point string contents.
1301 if (cm_HaveCallback(tscp) || tscp->fileType == CM_SCACHETYPE_UNKNOWN) {
1302 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
1303 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
1305 lock_ReleaseWrite(&tscp->rw);
1306 cm_ReleaseSCache(tscp);
1309 cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
1311 /* tscp is now locked */
1313 if (!(flags & CM_FLAG_NOMOUNTCHASE)
1314 && tscp->fileType == CM_SCACHETYPE_MOUNTPOINT) {
1315 /* mount points are funny: they have a volume name to mount
1318 code = cm_ReadMountPoint(tscp, userp, reqp);
1320 code = cm_FollowMountPoint(tscp, dscp, userp, reqp,
1322 lock_ReleaseWrite(&tscp->rw);
1323 cm_ReleaseSCache(tscp);
1330 lock_ReleaseWrite(&tscp->rw);
1333 /* copy back pointer */
1336 /* insert scache in dnlc */
1337 if ( !dnlcHit && !(flags & CM_FLAG_NOMOUNTCHASE) && rock.ExactFound ) {
1338 /* lock the directory entry to prevent racing callback revokes */
1339 lock_ObtainRead(&dscp->rw);
1340 if ( dscp->cbServerp != NULL && dscp->cbExpires > 0 ) {
1341 /* TODO: reuse nnamep from above */
1344 nnamep = cm_ClientStringToNormStringAlloc(cnamep, -1, NULL);
1346 cm_dnlcEnter(dscp, nnamep, tscp);
1348 lock_ReleaseRead(&dscp->rw);
1365 int cm_ExpandSysName(cm_req_t * reqp, clientchar_t *inp, clientchar_t *outp, long outSizeCch, unsigned int index)
1370 int use_sysname64 = 0;
1372 if (cm_sysName64Count > 0 && reqp && !(reqp->flags & CM_REQ_WOW64) && (reqp->flags & CM_REQ_SOURCE_REDIR))
1376 tp = cm_ClientStrRChr(inp, '@');
1378 return 0; /* no @sys */
1380 if (cm_ClientStrCmp(tp, _C("@sys")) != 0)
1381 return 0; /* no @sys */
1383 /* caller just wants to know if this is a valid @sys type of name */
1388 if (use_sysname64 && index >= cm_sysName64Count)
1392 if (index >= cm_sysNameCount)
1395 /* otherwise generate the properly expanded @sys name */
1396 prefixCount = (int)(tp - inp);
1398 cm_ClientStrCpyN(outp, outSizeCch, inp, prefixCount); /* copy out "a." from "a.@sys" */
1399 outp[prefixCount] = 0; /* null terminate the "a." */
1402 cm_ClientStrCat(outp, outSizeCch, cm_sysName64List[index]);
1405 cm_ClientStrCat(outp, outSizeCch, cm_sysNameList[index]);
1410 long cm_EvaluateVolumeReference(clientchar_t * namep, long flags, cm_user_t * userp,
1411 cm_req_t *reqp, cm_scache_t ** outScpp)
1413 afs_uint32 code = 0;
1414 fschar_t cellName[CELL_MAXNAMELEN];
1415 fschar_t volumeName[VL_MAXNAMELEN];
1419 fschar_t * fnamep = NULL;
1421 cm_cell_t * cellp = NULL;
1422 cm_volume_t * volp = NULL;
1426 int mountType = RWVOL;
1428 osi_Log1(afsd_logp, "cm_EvaluateVolumeReference for string [%S]",
1429 osi_LogSaveClientString(afsd_logp, namep));
1431 if (cm_ClientStrCmpNI(namep, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH) != 0) {
1432 goto _exit_invalid_path;
1435 /* namep is assumed to look like the following:
1437 @vol:<cellname>%<volume>\0
1439 @vol:<cellname>#<volume>\0
1443 fnamep = cm_ClientStringToFsStringAlloc(namep, -1, NULL);
1444 cp = fnamep + CM_PREFIX_VOL_CCH; /* cp points to cell name, hopefully */
1445 tp = cm_FsStrChr(cp, '%');
1447 tp = cm_FsStrChr(cp, '#');
1449 (len = tp - cp) == 0 ||
1450 len > CELL_MAXNAMELEN)
1451 goto _exit_invalid_path;
1452 cm_FsStrCpyN(cellName, lengthof(cellName), cp, len);
1457 cp = tp+1; /* cp now points to volume, supposedly */
1458 cm_FsStrCpy(volumeName, lengthof(volumeName), cp);
1460 /* OK, now we have the cell and the volume */
1461 osi_Log2(afsd_logp, " Found cell [%s] and volume [%s]",
1462 osi_LogSaveFsString(afsd_logp, cellName),
1463 osi_LogSaveFsString(afsd_logp, volumeName));
1465 cellp = cm_GetCell(cellName, CM_FLAG_CREATE);
1466 if (cellp == NULL) {
1467 goto _exit_invalid_path;
1470 len = cm_FsStrLen(volumeName);
1471 if (len >= 8 && cm_FsStrCmp(volumeName + len - 7, ".backup") == 0)
1473 else if (len >= 10 &&
1474 cm_FsStrCmp(volumeName + len - 9, ".readonly") == 0)
1479 if (cm_VolNameIsID(volumeName)) {
1480 code = cm_FindVolumeByID(cellp, atoi(volumeName), userp, reqp,
1481 CM_GETVOL_FLAG_CREATE, &volp);
1483 code = cm_FindVolumeByName(cellp, volumeName, userp, reqp,
1484 CM_GETVOL_FLAG_CREATE, &volp);
1490 if (volType == BACKVOL)
1491 volume = volp->vol[BACKVOL].ID;
1492 else if (volType == ROVOL ||
1493 (volType == RWVOL && mountType == ROVOL && volp->vol[ROVOL].ID != 0))
1494 volume = volp->vol[ROVOL].ID;
1496 volume = volp->vol[RWVOL].ID;
1498 cm_SetFid(&fid, cellp->cellID, volume, 1, 1);
1500 code = cm_GetSCache(&fid, NULL, outScpp, userp, reqp);
1513 if (flags & CM_FLAG_CHECKPATH)
1514 return CM_ERROR_NOSUCHPATH;
1516 return CM_ERROR_NOSUCHFILE;
1519 #ifdef DEBUG_REFCOUNT
1520 long cm_LookupDbg(cm_scache_t *dscp, clientchar_t *namep, long flags, cm_user_t *userp,
1521 cm_req_t *reqp, cm_scache_t **outScpp, char * file, long line)
1523 long cm_Lookup(cm_scache_t *dscp, clientchar_t *namep, long flags, cm_user_t *userp,
1524 cm_req_t *reqp, cm_scache_t **outScpp)
1528 clientchar_t tname[AFSPATHMAX];
1529 int sysNameIndex = 0;
1530 cm_scache_t *scp = NULL;
1532 #ifdef DEBUG_REFCOUNT
1533 afsi_log("%s:%d cm_Lookup dscp 0x%p ref %d", file, line, dscp, dscp->refCount, file, line);
1534 osi_Log2(afsd_logp, "cm_Lookup dscp 0x%p ref %d", dscp, dscp->refCount);
1537 if ( cm_ClientStrCmpI(namep,_C(SMB_IOCTL_FILENAME_NOSLASH)) == 0 ) {
1538 if (flags & CM_FLAG_CHECKPATH)
1539 return CM_ERROR_NOSUCHPATH;
1541 return CM_ERROR_NOSUCHFILE;
1544 if (dscp == cm_data.rootSCachep &&
1545 cm_ClientStrCmpNI(namep, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH) == 0) {
1546 return cm_EvaluateVolumeReference(namep, flags, userp, reqp, outScpp);
1549 if (cm_ExpandSysName(reqp, namep, NULL, 0, 0) > 0) {
1550 for ( sysNameIndex = 0; sysNameIndex < MAXNUMSYSNAMES; sysNameIndex++) {
1551 code = cm_ExpandSysName(reqp, namep, tname, lengthof(tname), sysNameIndex);
1553 code = cm_LookupInternal(dscp, tname, flags, userp, reqp, &scp);
1554 #ifdef DEBUG_REFCOUNT
1555 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);
1556 osi_Log3(afsd_logp, "cm_LookupInternal (1) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1564 cm_ReleaseSCache(scp);
1568 code = cm_LookupInternal(dscp, namep, flags, userp, reqp, &scp);
1569 #ifdef DEBUG_REFCOUNT
1570 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);
1571 osi_Log3(afsd_logp, "cm_LookupInternal (2) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1578 code = cm_LookupInternal(dscp, namep, flags, userp, reqp, &scp);
1579 #ifdef DEBUG_REFCOUNT
1580 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);
1581 osi_Log3(afsd_logp, "cm_LookupInternal (2) code 0x%x dscp 0x%p scp 0x%p", code, dscp, scp);
1587 /* None of the possible sysName expansions could be found */
1588 if (flags & CM_FLAG_CHECKPATH)
1589 return CM_ERROR_NOSUCHPATH;
1591 return CM_ERROR_NOSUCHFILE;
1594 /*! \brief Unlink a file name
1596 Encapsulates a call to RXAFS_RemoveFile().
1598 \param[in] dscp cm_scache_t pointing at the directory containing the
1599 name to be unlinked.
1601 \param[in] fnamep Original name to be unlinked. This is the
1602 name that will be passed into the RXAFS_RemoveFile() call.
1603 This parameter is optional. If not provided, the value will
1606 \param[in] came Client name to be unlinked. This name will be used
1607 to update the local directory caches.
1609 \param[in] userp cm_user_t for the request.
1611 \param[in] reqp Request tracker.
1614 long cm_Unlink(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t * cnamep,
1615 cm_user_t *userp, cm_req_t *reqp)
1621 AFSFetchStatus newDirStatus;
1623 struct rx_connection * rxconnp;
1625 cm_scache_t *scp = NULL;
1626 int free_fnamep = FALSE;
1629 memset(&volSync, 0, sizeof(volSync));
1631 if (fnamep == NULL) {
1634 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
1635 CM_DIROP_FLAG_NONE, &dirop);
1637 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
1640 cm_EndDirOp(&dirop);
1647 #ifdef AFS_FREELANCE_CLIENT
1648 if (cm_freelanceEnabled && dscp == cm_data.rootSCachep) {
1649 /* deleting a mount point from the root dir. */
1650 code = cm_FreelanceRemoveMount(fnamep);
1655 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
1659 /* Check for RO volume */
1660 if (dscp->flags & CM_SCACHEFLAG_RO) {
1661 code = CM_ERROR_READONLY;
1665 /* make sure we don't screw up the dir status during the merge */
1666 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE,
1667 CM_DIROP_FLAG_NONE, &dirop);
1669 lock_ObtainWrite(&dscp->rw);
1670 sflags = CM_SCACHESYNC_STOREDATA;
1671 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, sflags);
1672 lock_ReleaseWrite(&dscp->rw);
1674 cm_EndDirOp(&dirop);
1679 InterlockedIncrement(&dscp->activeRPCs);
1681 afsFid.Volume = dscp->fid.volume;
1682 afsFid.Vnode = dscp->fid.vnode;
1683 afsFid.Unique = dscp->fid.unique;
1685 osi_Log1(afsd_logp, "CALL RemoveFile scp 0x%p", dscp);
1687 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
1691 rxconnp = cm_GetRxConn(connp);
1692 code = RXAFS_RemoveFile(rxconnp, &afsFid, fnamep,
1693 &newDirStatus, &volSync);
1694 rx_PutConnection(rxconnp);
1696 } while (cm_Analyze(connp, userp, reqp, &dscp->fid, NULL, 1, &newDirStatus, &volSync, NULL, NULL, code));
1697 code = cm_MapRPCError(code, reqp);
1700 osi_Log1(afsd_logp, "CALL RemoveFile FAILURE, code 0x%x", code);
1702 osi_Log0(afsd_logp, "CALL RemoveFile SUCCESS");
1705 lock_ObtainWrite(&dirop.scp->dirlock);
1706 dirop.lockType = CM_DIRLOCK_WRITE;
1708 lock_ObtainWrite(&dscp->rw);
1709 cm_dnlcRemove(dscp, cnamep);
1711 code = cm_MergeStatus(NULL, dscp, &newDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
1713 if (cm_CheckDirOpForSingleChange(&dirop) && cnamep) {
1714 lock_ReleaseWrite(&dscp->rw);
1715 cm_DirDeleteEntry(&dirop, fnamep);
1717 cm_BPlusDirDeleteEntry(&dirop, cnamep);
1719 lock_ObtainWrite(&dscp->rw);
1722 InterlockedDecrement(&scp->activeRPCs);
1723 if (code == CM_ERROR_NOSUCHFILE) {
1724 /* windows would not have allowed the request to delete the file
1725 * if it did not believe the file existed. therefore, we must
1726 * have an inconsistent view of the world.
1728 dscp->cbServerp = NULL;
1732 cm_SyncOpDone(dscp, NULL, sflags);
1733 lock_ReleaseWrite(&dscp->rw);
1735 cm_EndDirOp(&dirop);
1737 if (invalidate && RDR_Initialized &&
1738 scp->fileType != CM_SCACHETYPE_FILE && scp->fileType != CM_SCACHETYPE_DIRECTORY)
1739 RDR_InvalidateObject(dscp->fid.cell, dscp->fid.volume, dscp->fid.vnode,
1740 dscp->fid.unique, dscp->fid.hash,
1741 dscp->fileType, AFS_INVALIDATE_DATA_VERSION);
1745 lock_ObtainWrite(&scp->rw);
1746 if (--scp->linkCount == 0) {
1747 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_DELETED);
1748 lock_ObtainWrite(&cm_scacheLock);
1749 cm_AdjustScacheLRU(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];
1792 afs_uint32 bytesRead = 0;
1794 /* read the link data from the file server */
1795 offset.LowPart = offset.HighPart = 0;
1796 code = cm_GetData(linkScp, &offset, temp, MOUNTPOINTLEN, &bytesRead, userp, reqp);
1801 * linkScp->length is the actual length of the symlink target string.
1802 * It is current because cm_GetData merged the most up to date
1803 * status info into scp and has not dropped the rwlock since.
1805 if (linkScp->length.LowPart > MOUNTPOINTLEN - 1)
1806 return CM_ERROR_TOOBIG;
1807 if (linkScp->length.LowPart == 0)
1808 return CM_ERROR_INVAL;
1810 /* make sure we are NUL terminated */
1811 temp[linkScp->length.LowPart] = 0;
1812 memcpy(linkScp->mountPointStringp, temp, linkScp->length.LowPart + 1);
1813 linkScp->mpDataVersion = linkScp->dataVersion;
1816 if ( !strnicmp(linkScp->mountPointStringp, "msdfs:", strlen("msdfs:")) )
1817 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1819 } /* don't have symlink contents cached */
1824 /* called with a held vnode and a path suffix, with the held vnode being a
1825 * symbolic link. Our goal is to generate a new path to interpret, and return
1826 * this new path in newSpaceBufferp. If the new vnode is relative to a dir
1827 * other than the directory containing the symbolic link, then the new root is
1828 * returned in *newRootScpp, otherwise a null is returned there.
1830 long cm_AssembleLink(cm_scache_t *linkScp, fschar_t *pathSuffixp,
1831 cm_scache_t **newRootScpp, cm_space_t **newSpaceBufferp,
1832 cm_user_t *userp, cm_req_t *reqp)
1839 *newRootScpp = NULL;
1840 *newSpaceBufferp = NULL;
1842 lock_ObtainWrite(&linkScp->rw);
1844 * Do not get status if we do not already have a callback.
1845 * The process of reading the symlink string will obtain status information
1846 * in a single RPC. No reason to add a second round trip.
1848 * If we do have a callback, use cm_SyncOp to get status in case the
1849 * current cm_user_t is not the same as the one that obtained the
1850 * symlink string contents.
1852 if (cm_HaveCallback(linkScp)) {
1853 code = cm_SyncOp(linkScp, NULL, userp, reqp, 0,
1854 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
1856 lock_ReleaseWrite(&linkScp->rw);
1857 cm_ReleaseSCache(linkScp);
1860 cm_SyncOpDone(linkScp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
1862 code = cm_HandleLink(linkScp, userp, reqp);
1866 /* if we may overflow the buffer, bail out; buffer is signficantly
1867 * bigger than max path length, so we don't really have to worry about
1868 * being a little conservative here.
1870 if (cm_FsStrLen(linkScp->mountPointStringp) + cm_FsStrLen(pathSuffixp) + 2
1871 >= CM_UTILS_SPACESIZE) {
1872 code = CM_ERROR_TOOBIG;
1876 tsp = cm_GetSpace();
1877 linkp = linkScp->mountPointStringp;
1878 if (strncmp(linkp, cm_mountRoot, cm_mountRootLen) == 0) {
1879 if (strlen(linkp) > cm_mountRootLen)
1880 StringCbCopyA((char *) tsp->data, sizeof(tsp->data), linkp+cm_mountRootLen+1);
1883 *newRootScpp = cm_RootSCachep(userp, reqp);
1884 cm_HoldSCache(*newRootScpp);
1885 } else if (linkp[0] == '\\' && linkp[1] == '\\') {
1886 if (!strnicmp(&linkp[2], cm_NetbiosName, (len = (long)strlen(cm_NetbiosName))))
1888 char * p = &linkp[len + 3];
1889 if (strnicmp(p, "all", 3) == 0)
1892 StringCbCopyA(tsp->data, sizeof(tsp->data), p);
1893 for (p = tsp->data; *p; p++) {
1897 *newRootScpp = cm_RootSCachep(userp, reqp);
1898 cm_HoldSCache(*newRootScpp);
1900 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1901 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1902 code = CM_ERROR_PATH_NOT_COVERED;
1904 } else if ( linkScp->fileType == CM_SCACHETYPE_DFSLINK ||
1905 !strnicmp(linkp, "msdfs:", (len = (long)strlen("msdfs:"))) ) {
1906 linkScp->fileType = CM_SCACHETYPE_DFSLINK;
1907 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1908 code = CM_ERROR_PATH_NOT_COVERED;
1909 } else if (*linkp == '\\' || *linkp == '/') {
1911 /* formerly, this was considered to be from the AFS root,
1912 * but this seems to create problems. instead, we will just
1913 * reject the link */
1914 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp+1);
1915 *newRootScpp = cm_RootSCachep(userp, reqp);
1916 cm_HoldSCache(*newRootScpp);
1918 /* we still copy the link data into the response so that
1919 * the user can see what the link points to
1921 linkScp->fileType = CM_SCACHETYPE_INVALID;
1922 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1923 code = CM_ERROR_NOSUCHPATH;
1926 /* a relative link */
1927 StringCchCopyA(tsp->data,lengthof(tsp->data), linkp);
1929 if (pathSuffixp[0] != 0) { /* if suffix string is non-null */
1930 StringCchCatA(tsp->data,lengthof(tsp->data), "\\");
1931 StringCchCatA(tsp->data,lengthof(tsp->data), pathSuffixp);
1935 clientchar_t * cpath = cm_FsStringToClientStringAlloc(tsp->data, -1, NULL);
1936 if (cpath != NULL) {
1937 cm_ClientStrCpy(tsp->wdata, lengthof(tsp->wdata), cpath);
1939 *newSpaceBufferp = tsp;
1941 code = CM_ERROR_NOSUCHPATH;
1948 if (code == CM_ERROR_PATH_NOT_COVERED && reqp->tidPathp && reqp->relPathp) {
1949 cm_VolStatus_Notify_DFS_Mapping(linkScp, reqp->tidPathp, reqp->relPathp);
1954 lock_ReleaseWrite(&linkScp->rw);
1957 #ifdef DEBUG_REFCOUNT
1958 long cm_NameIDbg(cm_scache_t *rootSCachep, clientchar_t *pathp, long flags,
1959 cm_user_t *userp, clientchar_t *tidPathp, cm_req_t *reqp,
1960 cm_scache_t **outScpp,
1961 char * file, long line)
1963 long cm_NameI(cm_scache_t *rootSCachep, clientchar_t *pathp, long flags,
1964 cm_user_t *userp, clientchar_t *tidPathp,
1965 cm_req_t *reqp, cm_scache_t **outScpp)
1969 clientchar_t *tp; /* ptr moving through input buffer */
1970 clientchar_t tc; /* temp char */
1971 int haveComponent; /* has new component started? */
1972 clientchar_t component[AFSPATHMAX]; /* this is the new component */
1973 clientchar_t *cp; /* component name being assembled */
1974 cm_scache_t *tscp; /* current location in the hierarchy */
1975 cm_scache_t *nscp; /* next dude down */
1976 cm_scache_t *dirScp; /* last dir we searched */
1977 cm_scache_t *linkScp; /* new root for the symlink we just
1979 cm_space_t *psp; /* space for current path, if we've hit
1981 cm_space_t *tempsp; /* temp vbl */
1982 clientchar_t *restp; /* rest of the pathname to interpret */
1983 int symlinkCount; /* count of # of symlinks traversed */
1984 int extraFlag; /* avoid chasing mt pts for dir cmd */
1985 int phase = 1; /* 1 = tidPathp, 2 = pathp */
1986 cm_fid_t fids[MAX_FID_COUNT]; /* array of fids processed in this path walk */
1987 int fid_count = 0; /* number of fids processed in this path walk */
1992 #ifdef DEBUG_REFCOUNT
1993 afsi_log("%s:%d cm_NameI rootscp 0x%p ref %d", file, line, rootSCachep, rootSCachep->refCount);
1994 osi_Log4(afsd_logp,"cm_NameI rootscp 0x%p path %S tidpath %S flags 0x%x",
1995 rootSCachep, pathp ? pathp : L"<NULL>", tidPathp ? tidPathp : L"<NULL>",
2010 cm_HoldSCache(tscp);
2018 /* map Unix slashes into DOS ones so we can interpret Unix
2024 if (!haveComponent) {
2027 } else if (tc == 0) {
2041 /* we have a component here */
2042 if (tc == 0 || tc == '\\') {
2043 /* end of the component; we're at the last
2044 * component if tc == 0. However, if the last
2045 * is a symlink, we have more to do.
2047 *cp++ = 0; /* add null termination */
2050 if (tscp == cm_RootSCachep(userp, reqp)) {
2051 code = cm_Lookup(tscp, component, CM_FLAG_CHECKPATH, userp, reqp, &nscp);
2053 if ((code == CM_ERROR_NOSUCHPATH || code == CM_ERROR_NOSUCHFILE ||
2054 code == CM_ERROR_BPLUS_NOMATCH) &&
2055 tscp == cm_data.rootSCachep) {
2057 clientchar_t volref[AFSPATHMAX];
2059 if (wcschr(component, '%') != NULL || wcschr(component, '#') != NULL) {
2061 * A volume reference: <cell>{%,#}<volume> -> @vol:<cell>{%,#}<volume>
2063 cm_ClientStrCpyN(volref, AFSPATHMAX, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH);
2064 cm_ClientStrCat(volref, AFSPATHMAX, component);
2066 code = cm_EvaluateVolumeReference(volref, CM_FLAG_CHECKPATH, userp, reqp, &nscp);
2068 #ifdef AFS_FREELANCE_CLIENT
2069 else if (tscp->fid.cell == AFS_FAKE_ROOT_CELL_ID && tscp->fid.volume == AFS_FAKE_ROOT_VOL_ID &&
2070 tscp->fid.vnode == 1 && tscp->fid.unique == 1) {
2072 * If this is the Freelance volume root directory then treat unrecognized
2073 * names as cell names and attempt to find the appropriate "root.cell".
2075 cm_ClientStrCpyN(volref, AFSPATHMAX, _C(CM_PREFIX_VOL), CM_PREFIX_VOL_CCH);
2076 if (component[0] == L'.') {
2077 cm_ClientStrCat(volref, AFSPATHMAX, &component[1]);
2078 cm_ClientStrCatN(volref, AFSPATHMAX, L"%", sizeof(WCHAR));
2080 cm_ClientStrCat(volref, AFSPATHMAX, component);
2081 cm_ClientStrCatN(volref, AFSPATHMAX, L"#", sizeof(WCHAR));
2083 cm_ClientStrCatN(volref, AFSPATHMAX, L"root.cell", 9 * sizeof(WCHAR));
2085 code = cm_EvaluateVolumeReference(volref, CM_FLAG_CHECKPATH, userp, reqp, &nscp);
2090 if ((flags & CM_FLAG_DIRSEARCH) && tc == 0)
2091 extraFlag = CM_FLAG_NOMOUNTCHASE;
2092 code = cm_Lookup(tscp, component,
2094 userp, reqp, &nscp);
2097 if (!cm_ClientStrCmp(component,_C("..")) ||
2098 !cm_ClientStrCmp(component,_C("."))) {
2100 * roll back the fid list until we find the
2101 * fid that matches where we are now. Its not
2102 * necessarily one or two fids because they
2103 * might have been symlinks or mount points or
2104 * both that were crossed.
2106 for ( i=fid_count-1; i>=0; i--) {
2107 if (!cm_FidCmp(&nscp->fid, &fids[i]))
2112 /* add the new fid to the list */
2113 if (fid_count == MAX_FID_COUNT) {
2114 code = CM_ERROR_TOO_MANY_SYMLINKS;
2115 cm_ReleaseSCache(nscp);
2119 fids[fid_count++] = nscp->fid;
2124 cm_ReleaseSCache(tscp);
2126 cm_ReleaseSCache(dirScp);
2129 if ((code == CM_ERROR_NOSUCHFILE || code == CM_ERROR_BPLUS_NOMATCH) &&
2130 tscp->fileType == CM_SCACHETYPE_SYMLINK) {
2131 osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_NOSUCHPATH");
2132 return CM_ERROR_NOSUCHPATH;
2134 osi_Log1(afsd_logp,"cm_NameI code 0x%x", code);
2139 haveComponent = 0; /* component done */
2141 cm_ReleaseSCache(dirScp);
2142 dirScp = tscp; /* for some symlinks */
2143 tscp = nscp; /* already held */
2145 if (tc == 0 && !(flags & CM_FLAG_FOLLOW) && phase == 2) {
2148 cm_ReleaseSCache(dirScp);
2154 /* now, if tscp is a symlink, we should follow it and
2155 * assemble the path again.
2157 lock_ObtainWrite(&tscp->rw);
2158 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
2159 CM_SCACHESYNC_GETSTATUS
2160 | CM_SCACHESYNC_NEEDCALLBACK);
2162 lock_ReleaseWrite(&tscp->rw);
2163 cm_ReleaseSCache(tscp);
2166 cm_ReleaseSCache(dirScp);
2171 cm_SyncOpDone(tscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2173 if (tscp->fileType == CM_SCACHETYPE_SYMLINK) {
2174 /* this is a symlink; assemble a new buffer */
2175 lock_ReleaseWrite(&tscp->rw);
2176 if (symlinkCount++ >= MAX_SYMLINK_COUNT) {
2177 cm_ReleaseSCache(tscp);
2180 cm_ReleaseSCache(dirScp);
2185 osi_Log0(afsd_logp,"cm_NameI code CM_ERROR_TOO_MANY_SYMLINKS");
2186 return CM_ERROR_TOO_MANY_SYMLINKS;
2196 /* TODO: make this better */
2197 frestp = cm_ClientStringToFsStringAlloc(restp, -1, NULL);
2198 code = cm_AssembleLink(tscp, frestp, &linkScp, &tempsp, userp, reqp);
2202 if (code == 0 && linkScp != NULL) {
2203 if (linkScp == cm_data.rootSCachep) {
2207 for ( i=0; i<fid_count; i++) {
2208 if ( !cm_FidCmp(&linkScp->fid, &fids[i]) ) {
2209 code = CM_ERROR_TOO_MANY_SYMLINKS;
2210 cm_ReleaseSCache(linkScp);
2216 if (i == fid_count && fid_count < MAX_FID_COUNT) {
2217 fids[fid_count++] = linkScp->fid;
2222 /* something went wrong */
2223 cm_ReleaseSCache(tscp);
2226 cm_ReleaseSCache(dirScp);
2232 /* otherwise, tempsp has the new path,
2233 * and linkScp is the new root from
2234 * which to interpret that path.
2235 * Continue with the namei processing,
2236 * also doing the bookkeeping for the
2237 * space allocation and tracking the
2238 * vnode reference counts.
2244 cm_ReleaseSCache(tscp);
2249 * now, if linkScp is null, that's
2250 * AssembleLink's way of telling us that
2251 * the sym link is relative to the dir
2252 * containing the link. We have a ref
2253 * to it in dirScp, and we hold it now
2254 * and reuse it as the new spot in the
2262 /* not a symlink, we may be done */
2263 lock_ReleaseWrite(&tscp->rw);
2271 cm_ReleaseSCache(dirScp);
2279 cm_ReleaseSCache(dirScp);
2282 } /* end of a component */
2285 } /* we have a component */
2286 } /* big while loop over all components */
2290 cm_ReleaseSCache(dirScp);
2296 cm_ReleaseSCache(tscp);
2298 #ifdef DEBUG_REFCOUNT
2299 afsi_log("%s:%d cm_NameI code 0x%x outScpp 0x%p ref %d", file, line, code, *outScpp, (*outScpp) ? (*outScpp)->refCount : 0);
2301 osi_Log2(afsd_logp,"cm_NameI code 0x%x outScpp 0x%p", code, *outScpp);
2305 /* called with a dir, and a vnode within the dir that happens to be a symlink.
2306 * We chase the link, and return a held pointer to the target, if it exists,
2307 * in *outScpp. If we succeed, we return 0, otherwise we return an error code
2308 * and do not hold or return a target vnode.
2310 * This is very similar to calling cm_NameI with the last component of a name,
2311 * which happens to be a symlink, except that we've already passed by the name.
2313 * This function is typically called by the directory listing functions, which
2314 * encounter symlinks but need to return the proper file length so programs
2315 * like "more" work properly when they make use of the attributes retrieved from
2318 * The input vnode should not be locked when this function is called.
2320 long cm_EvaluateSymLink(cm_scache_t *dscp, cm_scache_t *linkScp,
2321 cm_scache_t **outScpp, cm_user_t *userp, cm_req_t *reqp)
2325 cm_scache_t *newRootScp;
2329 osi_Log1(afsd_logp, "Evaluating symlink scp 0x%p", linkScp);
2331 code = cm_AssembleLink(linkScp, "", &newRootScp, &spacep, userp, reqp);
2335 /* now, if newRootScp is NULL, we're really being told that the symlink
2336 * is relative to the current directory (dscp).
2338 if (newRootScp == NULL) {
2340 cm_HoldSCache(dscp);
2343 code = cm_NameI(newRootScp, spacep->wdata,
2344 CM_FLAG_CASEFOLD | CM_FLAG_FOLLOW | CM_FLAG_DIRSEARCH,
2345 userp, NULL, reqp, outScpp);
2347 if (code == CM_ERROR_NOSUCHFILE || code == CM_ERROR_BPLUS_NOMATCH)
2348 code = CM_ERROR_NOSUCHPATH;
2350 /* this stuff is allocated no matter what happened on the namei call,
2352 cm_FreeSpace(spacep);
2353 cm_ReleaseSCache(newRootScp);
2355 if (linkScp == *outScpp) {
2356 cm_ReleaseSCache(*outScpp);
2358 code = CM_ERROR_NOSUCHPATH;
2364 /* for a given entry, make sure that it isn't in the stat cache, and then
2365 * add it to the list of file IDs to be obtained.
2367 * Don't bother adding it if we already have a vnode. Note that the dir
2368 * is locked, so we have to be careful checking the vnode we're thinking of
2369 * processing, to avoid deadlocks.
2371 long cm_TryBulkProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
2382 /* Don't overflow bsp. */
2383 if (bsp->counter >= CM_BULKMAX)
2384 return CM_ERROR_STOPNOW;
2386 thyper.LowPart = cm_data.buf_blockSize;
2387 thyper.HighPart = 0;
2388 thyper = LargeIntegerAdd(thyper, bsp->bufOffset);
2390 /* thyper is now the first byte past the end of the record we're
2391 * interested in, and bsp->bufOffset is the first byte of the record
2392 * we're interested in.
2393 * Skip data in the others.
2396 if (LargeIntegerLessThan(*offp, bsp->bufOffset))
2398 if (LargeIntegerGreaterThanOrEqualTo(*offp, thyper))
2399 return CM_ERROR_STOPNOW;
2400 if (strcmp(dep->name, ".") == 0 || strcmp(dep->name, "..") == 0)
2403 cm_SetFid(&tfid, scp->fid.cell, scp->fid.volume, ntohl(dep->fid.vnode), ntohl(dep->fid.unique));
2404 tscp = cm_FindSCache(&tfid);
2406 if (lock_TryWrite(&tscp->rw)) {
2407 /* we have an entry that we can look at */
2408 if (!cm_EAccesFindEntry(bsp->userp, &tscp->fid) && cm_HaveCallback(tscp)) {
2409 /* we have a callback on it. Don't bother
2410 * fetching this stat entry, since we're happy
2411 * with the info we have.
2413 lock_ReleaseWrite(&tscp->rw);
2414 cm_ReleaseSCache(tscp);
2417 lock_ReleaseWrite(&tscp->rw);
2419 cm_ReleaseSCache(tscp);
2422 #ifdef AFS_FREELANCE_CLIENT
2423 // yj: if this is a mountpoint under root.afs then we don't want it
2424 // to be bulkstat-ed, instead, we call getSCache directly and under
2425 // getSCache, it is handled specially.
2426 if ( cm_freelanceEnabled &&
2427 tfid.cell==AFS_FAKE_ROOT_CELL_ID &&
2428 tfid.volume==AFS_FAKE_ROOT_VOL_ID &&
2429 !(tfid.vnode==0x1 && tfid.unique==0x1) )
2431 osi_Log0(afsd_logp, "cm_TryBulkProc Freelance calls cm_SCache on root.afs mountpoint");
2432 return cm_GetSCache(&tfid, NULL, &tscp, NULL, NULL);
2434 #endif /* AFS_FREELANCE_CLIENT */
2437 bsp->fids[i].Volume = scp->fid.volume;
2438 bsp->fids[i].Vnode = tfid.vnode;
2439 bsp->fids[i].Unique = tfid.unique;
2444 cm_TryBulkStatRPC(cm_scache_t *dscp, cm_bulkStat_t *bbp, cm_user_t *userp, cm_req_t *reqp)
2447 AFSCBFids fidStruct;
2448 AFSBulkStats statStruct;
2450 AFSCBs callbackStruct;
2453 cm_callbackRequest_t cbReq;
2460 struct rx_connection * rxconnp;
2461 int inlinebulk; /* Did we use InlineBulkStatus RPC or not? */
2463 memset(&volSync, 0, sizeof(volSync));
2465 /* otherwise, we may have one or more bulk stat's worth of stuff in bb;
2466 * make the calls to create the entries. Handle AFSCBMAX files at a
2469 for (filex = 0; filex < bbp->counter; filex += filesThisCall) {
2470 filesThisCall = bbp->counter - filex;
2471 if (filesThisCall > AFSCBMAX)
2472 filesThisCall = AFSCBMAX;
2474 fidStruct.AFSCBFids_len = filesThisCall;
2475 fidStruct.AFSCBFids_val = &bbp->fids[filex];
2476 statStruct.AFSBulkStats_len = filesThisCall;
2477 statStruct.AFSBulkStats_val = &bbp->stats[filex];
2478 callbackStruct.AFSCBs_len = filesThisCall;
2479 callbackStruct.AFSCBs_val = &bbp->callbacks[filex];
2480 cm_StartCallbackGrantingCall(NULL, &cbReq);
2481 osi_Log1(afsd_logp, "CALL BulkStatus, %d entries", filesThisCall);
2484 * Whenever cm_Analyze is called for a RXAFS_ RPC there must
2485 * be a FID provided. However, the error code from RXAFS_BulkStatus
2486 * or RXAFS_InlinkBulkStatus does not apply to any FID. Therefore,
2487 * we generate an invalid FID to match with the RPC error.
2489 cm_SetFid(&tfid, dscp->fid.cell, dscp->fid.volume, 0, 0);
2494 code = cm_ConnFromFID(&tfid, userp, reqp, &connp);
2498 rxconnp = cm_GetRxConn(connp);
2499 if (SERVERHASINLINEBULK(connp)) {
2500 code = RXAFS_InlineBulkStatus(rxconnp, &fidStruct,
2501 &statStruct, &callbackStruct, &volSync);
2502 if (code == RXGEN_OPCODE) {
2503 SET_SERVERHASNOINLINEBULK(connp);
2510 * It is important to note that RXAFS_BulkStatus is quite braindead.
2511 * The AFS 3.6 file server implementation returns arrays that are
2512 * sized to hold responses for all of the requested FIDs but it only
2513 * populates their contents up to the point where it detects an error.
2514 * Unfortunately, it does inform the caller which entries were filled
2515 * and which were not. The caller has no ability to determine which
2516 * FID the RPC return code applies to or which of the FIDs valid status
2517 * info and callbacks have been issued for. As a result, when an
2518 * error is returned, none of the data received can be trusted.
2520 code = RXAFS_BulkStatus(rxconnp, &fidStruct,
2521 &statStruct, &callbackStruct, &volSync);
2523 rx_PutConnection(rxconnp);
2526 * If InlineBulk RPC was called and it succeeded,
2527 * then pull out the return code from the status info
2528 * and use it for cm_Analyze so that we can failover to other
2529 * .readonly volume instances. But only do it for errors that
2530 * are volume global.
2532 if (inlinebulk && code == 0 && (&bbp->stats[0])->errorCode) {
2533 osi_Log1(afsd_logp, "cm_TryBulkStat inline-bulk stat error: %d",
2534 (&bbp->stats[0])->errorCode);
2535 switch ((&bbp->stats[0])->errorCode) {
2544 code = (&bbp->stats[0])->errorCode;
2547 /* Rx and Rxkad errors are volume global */
2548 if ( (&bbp->stats[0])->errorCode >= -64 && (&bbp->stats[0])->errorCode < 0 ||
2549 (&bbp->stats[0])->errorCode >= ERROR_TABLE_BASE_RXK && (&bbp->stats[0])->errorCode < ERROR_TABLE_BASE_RXK + 256)
2550 code = (&bbp->stats[0])->errorCode;
2553 } while (cm_Analyze(connp, userp, reqp, &tfid, NULL, 0, &bbp->stats[0], &volSync, NULL, &cbReq, code));
2554 code = cm_MapRPCError(code, reqp);
2557 * might as well quit on an error, since we're not going to do
2558 * much better on the next immediate call, either.
2561 osi_Log2(afsd_logp, "CALL %sBulkStatus FAILURE code 0x%x",
2562 inlinebulk ? "Inline" : "", code);
2565 * Since an error occurred and it is impossible to determine
2566 * the context in which the returned error code should be
2567 * interpreted, we return the CM_ERROR_BULKSTAT_FAILURE error
2568 * which indicates that Bulk Stat cannot be used for the
2569 * current request. The caller should fallback to using
2570 * individual RXAFS_FetchStatus calls.
2572 code = CM_ERROR_BULKSTAT_FAILURE;
2574 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2579 * The bulk RPC has succeeded or at least not failed with a
2580 * volume global error result. For items that have inlineBulk
2581 * errors we must call cm_Analyze in order to perform required
2582 * logging of errors.
2584 * If the RPC was not inline bulk or the entry either has no error
2585 * the status must be merged.
2587 osi_Log1(afsd_logp, "CALL %sBulkStatus SUCCESS", inlinebulk ? "Inline" : "");
2589 for (i = 0; i<filesThisCall; i++) {
2591 cm_SetFid(&tfid, dscp->fid.cell, bbp->fids[j].Volume, bbp->fids[j].Vnode, bbp->fids[j].Unique);
2593 if (inlinebulk && (&bbp->stats[j])->errorCode) {
2594 cm_req_t treq = *reqp;
2595 cm_Analyze(NULL, userp, &treq, &tfid, NULL, 0, &bbp->stats[j], &volSync,
2596 NULL, &cbReq, (&bbp->stats[j])->errorCode);
2597 switch ((&bbp->stats[j])->errorCode) {
2602 cm_EAccesAddEntry(userp, &tfid, &dscp->fid);
2605 code = cm_GetSCache(&tfid, &dscp->fid, &scp, userp, reqp);
2610 * otherwise, if this entry has no callback info,
2611 * merge in this. If there is existing callback info
2612 * we skip the merge because the existing data must be
2613 * current (we have a callback) and the response from
2614 * a non-inline bulk rpc might actually be wrong.
2616 * now, we have to be extra paranoid on merging in this
2617 * information, since we didn't use cm_SyncOp before
2618 * starting the fetch to make sure that no bad races
2619 * were occurring. Specifically, we need to make sure
2620 * we don't obliterate any newer information in the
2621 * vnode than have here.
2623 * Right now, be pretty conservative: if there's a
2624 * callback or a pending call, skip it.
2625 * However, if the prior attempt to obtain status
2626 * was refused access or the volume is .readonly,
2627 * take the data in any case since we have nothing
2628 * better for the in flight directory enumeration that
2629 * resulted in this function being called.
2631 lock_ObtainRead(&scp->rw);
2632 if ((scp->cbServerp == NULL &&
2633 !(scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESTORING))) ||
2634 (scp->flags & CM_SCACHEFLAG_PURERO) ||
2635 cm_EAccesFindEntry(userp, &scp->fid))
2637 lock_ConvertRToW(&scp->rw);
2638 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
2641 CM_CALLBACK_MAINTAINCOUNT|CM_CALLBACK_BULKSTAT);
2643 InterlockedIncrement(&scp->activeRPCs);
2644 code = cm_MergeStatus(dscp, scp, &bbp->stats[j], &volSync, userp, reqp, CM_MERGEFLAG_BULKSTAT);
2646 lock_ReleaseWrite(&scp->rw);
2648 lock_ReleaseRead(&scp->rw);
2650 cm_ReleaseSCache(scp);
2652 } /* all files in the response */
2653 /* now tell it to drop the count,
2654 * after doing the vnode processing above */
2655 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
2656 } /* while there are still more files to process */
2661 /* called with a write locked scp and a pointer to a buffer. Make bulk stat
2662 * calls on all undeleted files in the page of the directory specified.
2665 cm_TryBulkStat(cm_scache_t *dscp, osi_hyper_t *offsetp, cm_user_t *userp,
2671 osi_Log1(afsd_logp, "cm_TryBulkStat dir 0x%p", dscp);
2673 /* should be on a buffer boundary */
2674 osi_assertx((offsetp->LowPart & (cm_data.buf_blockSize - 1)) == 0, "invalid offset");
2676 bbp = malloc(sizeof(cm_bulkStat_t));
2677 memset(bbp, 0, sizeof(cm_bulkStat_t));
2679 bbp->bufOffset = *offsetp;
2681 lock_ReleaseWrite(&dscp->rw);
2682 /* first, assemble the file IDs we need to stat */
2683 code = cm_ApplyDir(dscp, cm_TryBulkProc, (void *) bbp, offsetp, userp, reqp, NULL);
2685 /* if we failed, bail out early */
2686 if (code && code != CM_ERROR_STOPNOW) {
2688 lock_ObtainWrite(&dscp->rw);
2692 code = cm_TryBulkStatRPC(dscp, bbp, userp, reqp);
2693 osi_Log1(afsd_logp, "END cm_TryBulkStat code 0x%x", code);
2695 lock_ObtainWrite(&dscp->rw);
2700 void cm_StatusFromAttr(AFSStoreStatus *statusp, cm_scache_t *scp, cm_attr_t *attrp)
2704 /* initialize store back mask as inexpensive local variable */
2706 memset(statusp, 0, sizeof(AFSStoreStatus));
2708 /* copy out queued info from scache first, if scp passed in */
2710 if (scp->mask & CM_SCACHEMASK_CLIENTMODTIME) {
2711 statusp->ClientModTime = scp->clientModTime;
2712 mask |= AFS_SETMODTIME;
2713 scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
2718 /* now add in our locally generated request */
2719 if (attrp->mask & CM_ATTRMASK_CLIENTMODTIME) {
2720 statusp->ClientModTime = attrp->clientModTime;
2721 mask |= AFS_SETMODTIME;
2723 if (attrp->mask & CM_ATTRMASK_UNIXMODEBITS) {
2724 statusp->UnixModeBits = attrp->unixModeBits;
2725 mask |= AFS_SETMODE;
2727 if (attrp->mask & CM_ATTRMASK_OWNER) {
2728 statusp->Owner = attrp->owner;
2729 mask |= AFS_SETOWNER;
2731 if (attrp->mask & CM_ATTRMASK_GROUP) {
2732 statusp->Group = attrp->group;
2733 mask |= AFS_SETGROUP;
2736 statusp->Mask = mask;
2740 cm_IsSpaceAvailable(cm_fid_t * fidp, osi_hyper_t *sizep, cm_user_t *userp, cm_req_t *reqp)
2745 struct rx_connection * rxconnp;
2746 AFSFetchVolumeStatus volStat;
2747 cm_volume_t *volp = NULL;
2752 char volName[32]="(unknown)";
2753 char offLineMsg[256]="server temporarily inaccessible";
2754 char motd[256]="server temporarily inaccessible";
2755 osi_hyper_t freespace;
2759 if (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
2760 fidp->volume==AFS_FAKE_ROOT_VOL_ID)
2765 volp = cm_FindVolumeByFID(fidp, userp, reqp);
2770 volType = cm_VolumeType(volp, fidp->volume);
2771 if (volType == ROVOL || volType == BACKVOL) {
2776 cm_SetFid(&vfid, fidp->cell, fidp->volume, 1, 1);
2777 code = cm_GetSCache(&vfid, NULL, &vscp, userp, reqp);
2779 lock_ObtainWrite(&vscp->rw);
2780 code = cm_SyncOp(vscp, NULL, userp, reqp, PRSFS_READ,
2781 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2782 lock_ReleaseWrite(&vscp->rw);
2785 OfflineMsg = offLineMsg;
2789 code = cm_ConnFromFID(&vfid, userp, reqp, &connp);
2792 rxconnp = cm_GetRxConn(connp);
2793 code = RXAFS_GetVolumeStatus(rxconnp, fidp->volume,
2794 &volStat, &Name, &OfflineMsg, &MOTD);
2795 rx_PutConnection(rxconnp);
2797 } while (cm_Analyze(connp, userp, reqp, &vfid, NULL, 0, NULL, NULL, NULL, NULL, code));
2798 code = cm_MapRPCError(code, reqp);
2801 lock_ObtainWrite(&vscp->rw);
2802 cm_SyncOpDone(vscp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2803 lock_ReleaseWrite(&vscp->rw);
2804 cm_ReleaseSCache(vscp);
2808 if (volStat.MaxQuota) {
2809 freespace.QuadPart = 1024 * (afs_int64)min(volStat.MaxQuota - volStat.BlocksInUse, volStat.PartBlocksAvail);
2811 freespace.QuadPart = 1024 * (afs_int64)volStat.PartBlocksAvail;
2813 spaceAvail = LargeIntegerGreaterThanOrEqualTo(freespace, *sizep);
2815 /* the rpc failed, assume there is space and we can fail it later. */
2824 /* set the file size, and make sure that all relevant buffers have been
2825 * truncated. Ensure that any partially truncated buffers have been zeroed
2826 * to the end of the buffer.
2828 long cm_SetLength(cm_scache_t *scp, osi_hyper_t *sizep, cm_user_t *userp,
2835 /* start by locking out buffer creation */
2836 lock_ObtainWrite(&scp->bufCreateLock);
2838 /* verify that this is a file, not a dir or a symlink */
2839 lock_ObtainWrite(&scp->rw);
2840 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
2841 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2844 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
2846 if (scp->fileType != CM_SCACHETYPE_FILE) {
2847 code = CM_ERROR_ISDIR;
2852 if (LargeIntegerLessThan(*sizep, scp->length))
2857 lock_ReleaseWrite(&scp->rw);
2859 /* can't hold scp->rw lock here, since we may wait for a storeback to
2860 * finish if the buffer package is cleaning a buffer by storing it to
2864 buf_Truncate(scp, userp, reqp, sizep);
2866 /* now ensure that file length is short enough, and update truncPos */
2867 lock_ObtainWrite(&scp->rw);
2869 /* make sure we have a callback (so we have the right value for the
2870 * length), and wait for it to be safe to do a truncate.
2872 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_WRITE,
2873 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2874 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2876 /* If we only have 'i' bits, then we should still be able to set
2877 the size of a file we created. */
2878 if (code == CM_ERROR_NOACCESS && scp->creator == userp) {
2879 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
2880 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2881 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2887 if (LargeIntegerLessThan(*sizep, scp->length)) {
2888 /* a real truncation. If truncPos is not set yet, or is bigger
2889 * than where we're truncating the file, set truncPos to this
2893 cm_SyncOpDone(scp, NULL,
2894 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2895 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2898 if (!(scp->mask & CM_SCACHEMASK_TRUNCPOS)
2899 || LargeIntegerLessThan(*sizep, scp->length)) {
2901 scp->truncPos = *sizep;
2902 scp->mask |= CM_SCACHEMASK_TRUNCPOS;
2904 /* in either case, the new file size has been changed */
2905 scp->length = *sizep;
2906 scp->mask |= CM_SCACHEMASK_LENGTH;
2908 else if (LargeIntegerGreaterThan(*sizep, scp->length)) {
2910 * Really extending the file so must check to see if we
2911 * have sufficient quota. cm_IsSpaceAvailable() obtains
2912 * the cm_scache.rw lock on the volume root directory.
2913 * vnode 1 < scp->fid.vnode therefore calling cm_IsSpaceAvailable
2914 * while holding scp->rw is a lock order violation.
2915 * Dropping it is ok because we are holding scp->bufCreateLock
2916 * which prevents the size of the file from changing.
2918 afs_uint64 nextChunk = scp->length.QuadPart;
2920 nextChunk -= (nextChunk & 0xFFFFF);
2921 nextChunk += 0x100000;
2923 if (sizep->QuadPart > nextChunk) {
2924 lock_ReleaseWrite(&scp->rw);
2925 available = cm_IsSpaceAvailable(&scp->fid, sizep, userp, reqp);
2926 lock_ObtainWrite(&scp->rw);
2929 * The file server permits 1MB quota overruns so only check
2930 * when the file size increases by at least that much.
2935 scp->length = *sizep;
2936 scp->mask |= CM_SCACHEMASK_LENGTH;
2938 code = CM_ERROR_SPACE;
2943 /* done successfully */
2947 cm_SyncOpDone(scp, NULL,
2948 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2949 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2952 lock_ReleaseWrite(&scp->rw);
2953 lock_ReleaseWrite(&scp->bufCreateLock);
2958 /* set the file size or other attributes (but not both at once) */
2959 long cm_SetAttr(cm_scache_t *scp, cm_attr_t *attrp, cm_user_t *userp,
2963 AFSFetchStatus afsOutStatus;
2967 AFSStoreStatus afsInStatus;
2968 struct rx_connection * rxconnp;
2970 memset(&volSync, 0, sizeof(volSync));
2972 /* handle file length setting */
2973 if (attrp->mask & CM_ATTRMASK_LENGTH)
2974 return cm_SetLength(scp, &attrp->length, userp, reqp);
2976 lock_ObtainWrite(&scp->rw);
2977 /* Check for RO volume */
2978 if (scp->flags & CM_SCACHEFLAG_RO) {
2979 code = CM_ERROR_READONLY;
2980 lock_ReleaseWrite(&scp->rw);
2984 /* otherwise, we have to make an RPC to get the status */
2985 code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STORESTATUS);
2987 lock_ReleaseWrite(&scp->rw);
2990 lock_ConvertWToR(&scp->rw);
2992 /* make the attr structure */
2993 cm_StatusFromAttr(&afsInStatus, scp, attrp);
2995 tfid.Volume = scp->fid.volume;
2996 tfid.Vnode = scp->fid.vnode;
2997 tfid.Unique = scp->fid.unique;
2998 lock_ReleaseRead(&scp->rw);
3000 /* now make the RPC */
3001 InterlockedIncrement(&scp->activeRPCs);
3003 osi_Log1(afsd_logp, "CALL StoreStatus scp 0x%p", scp);
3005 code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
3009 rxconnp = cm_GetRxConn(connp);
3010 code = RXAFS_StoreStatus(rxconnp, &tfid,
3011 &afsInStatus, &afsOutStatus, &volSync);
3012 rx_PutConnection(rxconnp);
3014 } while (cm_Analyze(connp, userp, reqp,
3015 &scp->fid, NULL, 1, &afsOutStatus, &volSync, NULL, NULL, code));
3016 code = cm_MapRPCError(code, reqp);
3019 osi_Log1(afsd_logp, "CALL StoreStatus FAILURE, code 0x%x", code);
3021 osi_Log0(afsd_logp, "CALL StoreStatus SUCCESS");
3023 lock_ObtainWrite(&scp->rw);
3025 code = cm_MergeStatus( NULL, scp, &afsOutStatus, &volSync, userp, reqp,
3026 CM_MERGEFLAG_FORCE|CM_MERGEFLAG_STOREDATA);
3028 InterlockedDecrement(&scp->activeRPCs);
3029 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STORESTATUS);
3031 /* if we're changing the mode bits, discard the ACL cache,
3032 * since we changed the mode bits.
3034 if (afsInStatus.Mask & AFS_SETMODE)
3035 cm_FreeAllACLEnts(scp);
3036 lock_ReleaseWrite(&scp->rw);
3040 long cm_Create(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
3041 cm_scache_t **scpp, cm_user_t *userp, cm_req_t *reqp)
3046 cm_callbackRequest_t cbReq;
3049 cm_scache_t *scp = NULL;
3052 AFSStoreStatus inStatus;
3053 AFSFetchStatus updatedDirStatus;
3054 AFSFetchStatus newFileStatus;
3055 AFSCallBack newFileCallback;
3057 struct rx_connection * rxconnp;
3059 fschar_t * fnamep = NULL;
3061 memset(&volSync, 0, sizeof(volSync));
3063 /* can't create names with @sys in them; must expand it manually first.
3064 * return "invalid request" if they try.
3066 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
3067 return CM_ERROR_ATSYS;
3070 #ifdef AFS_FREELANCE_CLIENT
3071 /* Freelance root volume does not hold files */
3072 if (cm_freelanceEnabled &&
3073 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
3074 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
3076 return CM_ERROR_NOACCESS;
3078 #endif /* AFS_FREELANCE_CLIENT */
3080 /* Check for RO volume */
3081 if (dscp->flags & CM_SCACHEFLAG_RO)
3082 return CM_ERROR_READONLY;
3084 /* before starting the RPC, mark that we're changing the file data, so
3085 * that someone who does a chmod will know to wait until our call
3088 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3090 lock_ObtainWrite(&dscp->rw);
3091 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3092 lock_ReleaseWrite(&dscp->rw);
3094 cm_StartCallbackGrantingCall(NULL, &cbReq);
3096 cm_EndDirOp(&dirop);
3103 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3105 cm_StatusFromAttr(&inStatus, NULL, attrp);
3107 /* try the RPC now */
3108 InterlockedIncrement(&dscp->activeRPCs);
3109 osi_Log1(afsd_logp, "CALL CreateFile scp 0x%p", dscp);
3111 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3115 dirAFSFid.Volume = dscp->fid.volume;
3116 dirAFSFid.Vnode = dscp->fid.vnode;
3117 dirAFSFid.Unique = dscp->fid.unique;
3119 rxconnp = cm_GetRxConn(connp);
3120 code = RXAFS_CreateFile(connp->rxconnp, &dirAFSFid, fnamep,
3121 &inStatus, &newAFSFid, &newFileStatus,
3122 &updatedDirStatus, &newFileCallback,
3124 rx_PutConnection(rxconnp);
3126 } while (cm_Analyze(connp, userp, reqp,
3127 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, &cbReq, code));
3128 code = cm_MapRPCError(code, reqp);
3131 osi_Log1(afsd_logp, "CALL CreateFile FAILURE, code 0x%x", code);
3133 osi_Log0(afsd_logp, "CALL CreateFile SUCCESS");
3136 lock_ObtainWrite(&dirop.scp->dirlock);
3137 dirop.lockType = CM_DIRLOCK_WRITE;
3139 lock_ObtainWrite(&dscp->rw);
3141 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3142 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3143 if (cm_CheckDirOpForSingleChange(&dirop)) {
3144 lock_ReleaseWrite(&dscp->rw);
3145 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3147 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3149 lock_ObtainWrite(&dscp->rw);
3152 InterlockedDecrement(&dscp->activeRPCs);
3154 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3155 lock_ReleaseWrite(&dscp->rw);
3157 /* now try to create the file's entry, too, but be careful to
3158 * make sure that we don't merge in old info. Since we weren't locking
3159 * out any requests during the file's creation, we may have pretty old
3163 code = cm_GetSCache(&newFid, &dscp->fid, &scp, userp, reqp);
3165 lock_ObtainWrite(&scp->rw);
3166 scp->creator = userp; /* remember who created it */
3167 if (!cm_HaveCallback(scp)) {
3168 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
3169 &newFileCallback, &volSync, 0);
3171 InterlockedIncrement(&scp->activeRPCs);
3172 code = cm_MergeStatus( dscp, scp, &newFileStatus, &volSync,
3177 lock_ReleaseWrite(&scp->rw);
3181 /* make sure we end things properly */
3183 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
3185 cm_EndDirOp(&dirop);
3194 cm_ReleaseSCache(scp);
3200 * locked if TRUE means write-locked
3201 * else the cm_scache_t rw must not be held
3203 long cm_FSync(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp, afs_uint32 locked)
3208 lock_ReleaseWrite(&scp->rw);
3210 osi_Log2(afsd_logp, "cm_FSync scp 0x%p userp 0x%p", scp, userp);
3212 code = buf_CleanVnode(scp, userp, reqp);
3214 lock_ObtainWrite(&scp->rw);
3216 if (scp->mask & (CM_SCACHEMASK_TRUNCPOS
3217 | CM_SCACHEMASK_CLIENTMODTIME
3218 | CM_SCACHEMASK_LENGTH))
3219 code = cm_StoreMini(scp, userp, reqp);
3221 if (scp->flags & (CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE)) {
3222 code = (scp->flags & CM_SCACHEFLAG_OVERQUOTA) ? CM_ERROR_QUOTA : CM_ERROR_SPACE;
3223 scp->flags &= ~(CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE);
3227 lock_ReleaseWrite(&scp->rw);
3228 } else if (locked) {
3229 lock_ObtainWrite(&scp->rw);
3234 long cm_MakeDir(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
3235 cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3240 cm_callbackRequest_t cbReq;
3243 cm_scache_t *scp = NULL;
3246 AFSStoreStatus inStatus;
3247 AFSFetchStatus updatedDirStatus;
3248 AFSFetchStatus newDirStatus;
3249 AFSCallBack newDirCallback;
3251 struct rx_connection * rxconnp;
3253 fschar_t * fnamep = NULL;
3255 memset(&volSync, 0, sizeof(volSync));
3257 /* can't create names with @sys in them; must expand it manually first.
3258 * return "invalid request" if they try.
3260 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
3261 return CM_ERROR_ATSYS;
3264 #ifdef AFS_FREELANCE_CLIENT
3265 /* Freelance root volume does not hold subdirectories */
3266 if (cm_freelanceEnabled &&
3267 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
3268 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
3270 return CM_ERROR_NOACCESS;
3272 #endif /* AFS_FREELANCE_CLIENT */
3274 /* Check for RO volume */
3275 if (dscp->flags & CM_SCACHEFLAG_RO)
3276 return CM_ERROR_READONLY;
3278 /* before starting the RPC, mark that we're changing the directory
3279 * data, so that someone who does a chmod on the dir will wait until
3280 * our call completes.
3282 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3284 lock_ObtainWrite(&dscp->rw);
3285 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3286 lock_ReleaseWrite(&dscp->rw);
3288 cm_StartCallbackGrantingCall(NULL, &cbReq);
3290 cm_EndDirOp(&dirop);
3297 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3298 cm_StatusFromAttr(&inStatus, NULL, attrp);
3300 /* try the RPC now */
3301 InterlockedIncrement(&dscp->activeRPCs);
3302 osi_Log1(afsd_logp, "CALL MakeDir scp 0x%p", dscp);
3304 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3308 dirAFSFid.Volume = dscp->fid.volume;
3309 dirAFSFid.Vnode = dscp->fid.vnode;
3310 dirAFSFid.Unique = dscp->fid.unique;
3312 rxconnp = cm_GetRxConn(connp);
3313 code = RXAFS_MakeDir(connp->rxconnp, &dirAFSFid, fnamep,
3314 &inStatus, &newAFSFid, &newDirStatus,
3315 &updatedDirStatus, &newDirCallback,
3317 rx_PutConnection(rxconnp);
3319 } while (cm_Analyze(connp, userp, reqp,
3320 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, &cbReq, code));
3321 code = cm_MapRPCError(code, reqp);
3324 osi_Log1(afsd_logp, "CALL MakeDir FAILURE, code 0x%x", code);
3326 osi_Log0(afsd_logp, "CALL MakeDir SUCCESS");
3329 lock_ObtainWrite(&dirop.scp->dirlock);
3330 dirop.lockType = CM_DIRLOCK_WRITE;
3332 lock_ObtainWrite(&dscp->rw);
3334 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3335 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3336 if (cm_CheckDirOpForSingleChange(&dirop)) {
3337 lock_ReleaseWrite(&dscp->rw);
3338 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3340 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3342 lock_ObtainWrite(&dscp->rw);
3345 InterlockedDecrement(&dscp->activeRPCs);
3347 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3348 lock_ReleaseWrite(&dscp->rw);
3350 /* now try to create the new dir's entry, too, but be careful to
3351 * make sure that we don't merge in old info. Since we weren't locking
3352 * out any requests during the file's creation, we may have pretty old
3356 code = cm_GetSCache(&newFid, &dscp->fid, &scp, userp, reqp);
3358 lock_ObtainWrite(&scp->rw);
3359 if (!cm_HaveCallback(scp)) {
3360 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
3361 &newDirCallback, &volSync, 0);
3363 InterlockedIncrement(&scp->activeRPCs);
3364 code = cm_MergeStatus( dscp, scp, &newDirStatus, &volSync,
3369 lock_ReleaseWrite(&scp->rw);
3373 /* make sure we end things properly */
3375 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
3377 cm_EndDirOp(&dirop);
3385 cm_ReleaseSCache(scp);
3388 /* and return error code */
3392 long cm_Link(cm_scache_t *dscp, clientchar_t *cnamep, cm_scache_t *sscp, long flags,
3393 cm_user_t *userp, cm_req_t *reqp)
3398 AFSFid existingAFSFid;
3399 AFSFetchStatus updatedDirStatus;
3400 AFSFetchStatus newLinkStatus;
3402 struct rx_connection * rxconnp;
3404 fschar_t * fnamep = NULL;
3407 memset(&volSync, 0, sizeof(volSync));
3409 if (dscp->fid.cell != sscp->fid.cell ||
3410 dscp->fid.volume != sscp->fid.volume) {
3411 return CM_ERROR_CROSSDEVLINK;
3414 /* Check for RO volume */
3415 if (dscp->flags & CM_SCACHEFLAG_RO)
3416 return CM_ERROR_READONLY;
3418 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3420 lock_ObtainWrite(&dscp->rw);
3421 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3422 lock_ReleaseWrite(&dscp->rw);
3424 cm_EndDirOp(&dirop);
3429 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3431 /* try the RPC now */
3432 InterlockedIncrement(&dscp->activeRPCs);
3433 osi_Log1(afsd_logp, "CALL Link scp 0x%p", dscp);
3435 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3438 dirAFSFid.Volume = dscp->fid.volume;
3439 dirAFSFid.Vnode = dscp->fid.vnode;
3440 dirAFSFid.Unique = dscp->fid.unique;
3442 existingAFSFid.Volume = sscp->fid.volume;
3443 existingAFSFid.Vnode = sscp->fid.vnode;
3444 existingAFSFid.Unique = sscp->fid.unique;
3446 rxconnp = cm_GetRxConn(connp);
3447 code = RXAFS_Link(rxconnp, &dirAFSFid, fnamep, &existingAFSFid,
3448 &newLinkStatus, &updatedDirStatus, &volSync);
3449 rx_PutConnection(rxconnp);
3450 osi_Log1(afsd_logp," RXAFS_Link returns 0x%x", code);
3452 } while (cm_Analyze(connp, userp, reqp, &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, NULL, code));
3454 code = cm_MapRPCError(code, reqp);
3457 osi_Log1(afsd_logp, "CALL Link FAILURE, code 0x%x", code);
3459 osi_Log0(afsd_logp, "CALL Link SUCCESS");
3462 lock_ObtainWrite(&dirop.scp->dirlock);
3463 dirop.lockType = CM_DIRLOCK_WRITE;
3465 lock_ObtainWrite(&dscp->rw);
3467 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3470 if (cm_CheckDirOpForSingleChange(&dirop)) {
3471 lock_ReleaseWrite(&dscp->rw);
3472 cm_DirCreateEntry(&dirop, fnamep, &sscp->fid);
3474 cm_BPlusDirCreateEntry(&dirop, cnamep, &sscp->fid);
3476 lock_ObtainWrite(&dscp->rw);
3479 InterlockedDecrement(&dscp->activeRPCs);
3481 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3482 lock_ReleaseWrite(&dscp->rw);
3484 cm_EndDirOp(&dirop);
3486 if (invalidate && RDR_Initialized)
3487 RDR_InvalidateObject(dscp->fid.cell, dscp->fid.volume, dscp->fid.vnode,
3488 dscp->fid.unique, dscp->fid.hash,
3489 dscp->fileType, AFS_INVALIDATE_DATA_VERSION);
3491 /* Update the linked object status */
3493 lock_ObtainWrite(&sscp->rw);
3494 InterlockedIncrement(&sscp->activeRPCs);
3495 code = cm_MergeStatus(NULL, sscp, &newLinkStatus, &volSync, userp, reqp, 0);
3496 lock_ReleaseWrite(&sscp->rw);
3504 long cm_SymLink(cm_scache_t *dscp, clientchar_t *cnamep, fschar_t *contentsp, long flags,
3505 cm_attr_t *attrp, cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3513 AFSStoreStatus inStatus;
3514 AFSFetchStatus updatedDirStatus;
3515 AFSFetchStatus newLinkStatus;
3517 struct rx_connection * rxconnp;
3519 fschar_t *fnamep = NULL;
3524 /* Check for RO volume */
3525 if (dscp->flags & CM_SCACHEFLAG_RO)
3526 return CM_ERROR_READONLY;
3528 memset(&volSync, 0, sizeof(volSync));
3530 /* before starting the RPC, mark that we're changing the directory data,
3531 * so that someone who does a chmod on the dir will wait until our
3534 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3536 lock_ObtainWrite(&dscp->rw);
3537 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3538 lock_ReleaseWrite(&dscp->rw);
3540 cm_EndDirOp(&dirop);
3545 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3547 cm_StatusFromAttr(&inStatus, NULL, attrp);
3549 /* try the RPC now */
3550 InterlockedIncrement(&dscp->activeRPCs);
3551 osi_Log1(afsd_logp, "CALL Symlink scp 0x%p", dscp);
3553 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3557 dirAFSFid.Volume = dscp->fid.volume;
3558 dirAFSFid.Vnode = dscp->fid.vnode;
3559 dirAFSFid.Unique = dscp->fid.unique;
3561 rxconnp = cm_GetRxConn(connp);
3562 code = RXAFS_Symlink(rxconnp, &dirAFSFid, fnamep, contentsp,
3563 &inStatus, &newAFSFid, &newLinkStatus,
3564 &updatedDirStatus, &volSync);
3565 rx_PutConnection(rxconnp);
3567 } while (cm_Analyze(connp, userp, reqp,
3568 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, NULL, code));
3569 code = cm_MapRPCError(code, reqp);
3572 osi_Log1(afsd_logp, "CALL Symlink FAILURE, code 0x%x", code);
3574 osi_Log0(afsd_logp, "CALL Symlink SUCCESS");
3577 lock_ObtainWrite(&dirop.scp->dirlock);
3578 dirop.lockType = CM_DIRLOCK_WRITE;
3580 lock_ObtainWrite(&dscp->rw);
3582 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3583 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3584 if (cm_CheckDirOpForSingleChange(&dirop)) {
3585 lock_ReleaseWrite(&dscp->rw);
3586 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3588 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3590 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3592 lock_ObtainWrite(&dscp->rw);
3595 InterlockedDecrement(&dscp->activeRPCs);
3597 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3598 lock_ReleaseWrite(&dscp->rw);
3600 cm_EndDirOp(&dirop);
3602 /* now try to create the new dir's entry, too, but be careful to
3603 * make sure that we don't merge in old info. Since we weren't locking
3604 * out any requests during the file's creation, we may have pretty old
3608 code = cm_GetSCache(&newFid, &dscp->fid, &scp, userp, reqp);
3610 lock_ObtainWrite(&scp->rw);
3611 if (!cm_HaveCallback(scp)) {
3612 InterlockedIncrement(&scp->activeRPCs);
3613 code = cm_MergeStatus( dscp, scp, &newLinkStatus, &volSync,
3616 lock_ReleaseWrite(&scp->rw);
3621 cm_ReleaseSCache(scp);
3628 /* and return error code */
3632 /*! \brief Remove a directory
3634 Encapsulates a call to RXAFS_RemoveDir().
3636 \param[in] dscp cm_scache_t for the directory containing the
3637 directory to be removed.
3639 \param[in] fnamep This will be the original name of the directory
3640 as known to the file server. It will be passed in to RXAFS_RemoveDir().
3641 This parameter is optional. If it is not provided the value
3644 \param[in] cnamep Normalized name used to update the local
3647 \param[in] userp cm_user_t for the request.
3649 \param[in] reqp Request tracker.
3651 long cm_RemoveDir(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t *cnamep, cm_user_t *userp, cm_req_t *reqp)
3657 AFSFetchStatus updatedDirStatus;
3659 struct rx_connection * rxconnp;
3661 cm_scache_t *scp = NULL;
3662 int free_fnamep = FALSE;
3664 memset(&volSync, 0, sizeof(volSync));
3666 if (fnamep == NULL) {
3669 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
3670 CM_DIROP_FLAG_NONE, &dirop);
3672 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
3675 cm_EndDirOp(&dirop);
3682 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
3686 /* Check for RO volume */
3687 if (dscp->flags & CM_SCACHEFLAG_RO) {
3688 code = CM_ERROR_READONLY;
3692 /* before starting the RPC, mark that we're changing the directory data,
3693 * so that someone who does a chmod on the dir will wait until our
3696 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3698 lock_ObtainWrite(&dscp->rw);
3699 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3700 lock_ReleaseWrite(&dscp->rw);
3702 cm_EndDirOp(&dirop);
3707 /* try the RPC now */
3708 InterlockedIncrement(&dscp->activeRPCs);
3709 osi_Log1(afsd_logp, "CALL RemoveDir scp 0x%p", dscp);
3711 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3715 dirAFSFid.Volume = dscp->fid.volume;
3716 dirAFSFid.Vnode = dscp->fid.vnode;
3717 dirAFSFid.Unique = dscp->fid.unique;
3719 rxconnp = cm_GetRxConn(connp);
3720 code = RXAFS_RemoveDir(rxconnp, &dirAFSFid, fnamep,
3721 &updatedDirStatus, &volSync);
3722 rx_PutConnection(rxconnp);
3724 } while (cm_Analyze(connp, userp, reqp,
3725 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, NULL, code));
3726 code = cm_MapRPCErrorRmdir(code, reqp);
3729 osi_Log1(afsd_logp, "CALL RemoveDir FAILURE, code 0x%x", code);
3731 osi_Log0(afsd_logp, "CALL RemoveDir SUCCESS");
3734 lock_ObtainWrite(&dirop.scp->dirlock);
3735 dirop.lockType = CM_DIRLOCK_WRITE;
3737 lock_ObtainWrite(&dscp->rw);
3739 cm_dnlcRemove(dscp, cnamep);
3740 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3741 if (cm_CheckDirOpForSingleChange(&dirop) && cnamep != NULL) {
3742 lock_ReleaseWrite(&dscp->rw);
3743 cm_DirDeleteEntry(&dirop, fnamep);
3745 cm_BPlusDirDeleteEntry(&dirop, cnamep);
3747 lock_ObtainWrite(&dscp->rw);
3750 InterlockedDecrement(&dscp->activeRPCs);
3752 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3753 lock_ReleaseWrite(&dscp->rw);
3755 cm_EndDirOp(&dirop);
3759 lock_ObtainWrite(&scp->rw);
3760 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_DELETED);
3761 lock_ObtainWrite(&cm_scacheLock);
3762 cm_AdjustScacheLRU(scp);
3763 lock_ReleaseWrite(&cm_scacheLock);
3764 lock_ReleaseWrite(&scp->rw);
3765 if (RDR_Initialized && !(reqp->flags & CM_REQ_SOURCE_REDIR))
3766 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode,
3767 scp->fid.unique, scp->fid.hash,
3768 scp->fileType, AFS_INVALIDATE_DELETED);
3770 cm_ReleaseSCache(scp);
3777 /* and return error code */
3781 long cm_Open(cm_scache_t *scp, int type, cm_user_t *userp)
3783 /* grab mutex on contents */
3784 lock_ObtainWrite(&scp->rw);
3786 /* reset the prefetch info */
3787 scp->prefetch.base.LowPart = 0; /* base */
3788 scp->prefetch.base.HighPart = 0;
3789 scp->prefetch.end.LowPart = 0; /* and end */
3790 scp->prefetch.end.HighPart = 0;
3792 /* release mutex on contents */
3793 lock_ReleaseWrite(&scp->rw);
3799 /*! \brief Rename a file or directory
3801 Encapsulates a RXAFS_Rename() call.
3803 \param[in] oldDscp cm_scache_t for the directory containing the old
3806 \param[in] oldNamep The original old name known to the file server.
3807 This is the name that will be passed into the RXAFS_Rename().
3808 If it is not provided, it will be looked up.
3810 \param[in] normalizedOldNamep Normalized old name. This is used for
3811 updating local directory caches.
3813 \param[in] newDscp cm_scache_t for the directory containing the new
3816 \param[in] newNamep New name. Normalized.
3818 \param[in] userp cm_user_t for the request.
3820 \param[in,out] reqp Request tracker.
3823 long cm_Rename(cm_scache_t *oldDscp, fschar_t *oldNamep, clientchar_t *cOldNamep,
3824 cm_scache_t *newDscp, clientchar_t *cNewNamep, cm_user_t *userp,
3829 AFSFid oldDirAFSFid;
3830 AFSFid newDirAFSFid;
3831 AFSFetchStatus updatedOldDirStatus;
3832 AFSFetchStatus updatedNewDirStatus;
3835 int bTargetExists = 0;
3836 struct rx_connection * rxconnp;
3837 cm_dirOp_t oldDirOp;
3840 cm_dirOp_t newDirOp;
3841 fschar_t * newNamep = NULL;
3842 int free_oldNamep = FALSE;
3843 cm_scache_t *oldScp = NULL, *oldTargetScp = NULL;
3844 int rpc_skipped = 0;
3846 memset(&volSync, 0, sizeof(volSync));
3848 if (cOldNamep == NULL || cNewNamep == NULL ||
3849 cm_ClientStrLen(cOldNamep) == 0 ||
3850 cm_ClientStrLen(cNewNamep) == 0)
3851 return CM_ERROR_INVAL;
3853 /* check for identical names */
3854 if (oldDscp == newDscp &&
3855 cm_ClientStrCmp(cOldNamep, cNewNamep) == 0) {
3856 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_RENAME_IDENTICAL",
3858 return CM_ERROR_RENAME_IDENTICAL;
3861 /* Check for RO volume */
3862 if ((oldDscp->flags & CM_SCACHEFLAG_RO) || (newDscp->flags & CM_SCACHEFLAG_RO)) {
3863 return CM_ERROR_READONLY;
3866 if (oldNamep == NULL) {
3869 code = cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_READ,
3870 CM_DIROP_FLAG_NONE, &oldDirOp);
3872 code = cm_BPlusDirLookupOriginalName(&oldDirOp, cOldNamep, &oldNamep);
3874 free_oldNamep = TRUE;
3875 cm_EndDirOp(&oldDirOp);
3879 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S Original Name lookup failed",
3880 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3885 /* before starting the RPC, mark that we're changing the directory data,
3886 * so that someone who does a chmod on the dir will wait until our call
3887 * completes. We do this in vnode order so that we don't deadlock,
3888 * which makes the code a little verbose.
3890 if (oldDscp == newDscp) {
3892 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3893 CM_DIROP_FLAG_NONE, &oldDirOp);
3894 lock_ObtainWrite(&oldDscp->rw);
3895 cm_dnlcRemove(oldDscp, cOldNamep);
3896 cm_dnlcRemove(oldDscp, cNewNamep);
3897 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3898 CM_SCACHESYNC_STOREDATA);
3899 lock_ReleaseWrite(&oldDscp->rw);
3901 cm_EndDirOp(&oldDirOp);
3905 /* two distinct dir vnodes */
3907 if (oldDscp->fid.cell != newDscp->fid.cell ||
3908 oldDscp->fid.volume != newDscp->fid.volume) {
3909 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_CROSSDEVLINK",
3911 code = CM_ERROR_CROSSDEVLINK;
3915 /* shouldn't happen that we have distinct vnodes for two
3916 * different files, but could due to deliberate attack, or
3917 * stale info. Avoid deadlocks and quit now.
3919 if (oldDscp->fid.vnode == newDscp->fid.vnode) {
3920 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p vnode collision",
3922 code = CM_ERROR_CROSSDEVLINK;
3926 if (oldDscp->fid.vnode < newDscp->fid.vnode) {
3927 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3928 CM_DIROP_FLAG_NONE, &oldDirOp);
3929 lock_ObtainWrite(&oldDscp->rw);
3930 cm_dnlcRemove(oldDscp, cOldNamep);
3931 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3932 CM_SCACHESYNC_STOREDATA);
3933 lock_ReleaseWrite(&oldDscp->rw);
3935 cm_EndDirOp(&oldDirOp);
3937 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3938 CM_DIROP_FLAG_NONE, &newDirOp);
3939 lock_ObtainWrite(&newDscp->rw);
3940 cm_dnlcRemove(newDscp, cNewNamep);
3941 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3942 CM_SCACHESYNC_STOREDATA);
3943 lock_ReleaseWrite(&newDscp->rw);
3945 cm_EndDirOp(&newDirOp);
3947 /* cleanup first one */
3948 lock_ObtainWrite(&oldDscp->rw);
3949 cm_SyncOpDone(oldDscp, NULL,
3950 CM_SCACHESYNC_STOREDATA);
3951 lock_ReleaseWrite(&oldDscp->rw);
3952 cm_EndDirOp(&oldDirOp);
3957 /* lock the new vnode entry first */
3958 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3959 CM_DIROP_FLAG_NONE, &newDirOp);
3960 lock_ObtainWrite(&newDscp->rw);
3961 cm_dnlcRemove(newDscp, cNewNamep);
3962 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3963 CM_SCACHESYNC_STOREDATA);
3964 lock_ReleaseWrite(&newDscp->rw);
3966 cm_EndDirOp(&newDirOp);
3968 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3969 CM_DIROP_FLAG_NONE, &oldDirOp);
3970 lock_ObtainWrite(&oldDscp->rw);
3971 cm_dnlcRemove(oldDscp, cOldNamep);
3972 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3973 CM_SCACHESYNC_STOREDATA);
3974 lock_ReleaseWrite(&oldDscp->rw);
3976 cm_EndDirOp(&oldDirOp);
3978 /* cleanup first one */
3979 lock_ObtainWrite(&newDscp->rw);
3980 cm_SyncOpDone(newDscp, NULL,
3981 CM_SCACHESYNC_STOREDATA);
3982 lock_ReleaseWrite(&newDscp->rw);
3983 cm_EndDirOp(&newDirOp);
3987 } /* two distinct vnodes */
3993 * The source and destination directories are now locked and no other local
3994 * changes can occur.
3996 * Before we permit the operation, make sure that we do not already have
3997 * an object in the destination directory that has a case-insensitive match
3998 * for this name UNLESS the matching object is the object we are renaming.
4000 code = cm_Lookup(oldDscp, cOldNamep, 0, userp, reqp, &oldScp);
4002 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S old name lookup failed",
4003 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
4008 /* Case sensitive lookup. If this succeeds we are done. */
4009 code = cm_Lookup(newDscp, cNewNamep, 0, userp, reqp, &oldTargetScp);
4012 * Case insensitive lookup. If this succeeds, it could have found the
4013 * same file with a name that differs only by case or it could be a
4014 * different file entirely.
4016 code = cm_Lookup(newDscp, cNewNamep, CM_FLAG_CASEFOLD, userp, reqp, &oldTargetScp);
4018 /* found a matching object with the new name */
4019 if (cm_FidCmp(&oldScp->fid, &oldTargetScp->fid)) {
4020 /* and they don't match so return an error */
4021 osi_Log2(afsd_logp, "cm_Rename newDscp 0x%p cNewName %S new name already exists",
4022 newDscp, osi_LogSaveStringW(afsd_logp, cNewNamep));
4023 code = CM_ERROR_EXISTS;
4025 cm_ReleaseSCache(oldTargetScp);
4026 oldTargetScp = NULL;
4027 } else if (code == CM_ERROR_AMBIGUOUS_FILENAME) {
4028 code = CM_ERROR_EXISTS;
4030 /* The target does not exist. Clear the error and perform the rename. */
4042 newNamep = cm_ClientStringToFsStringAlloc(cNewNamep, -1, NULL);
4044 /* try the RPC now */
4045 InterlockedIncrement(&oldDscp->activeRPCs);
4047 InterlockedIncrement(&newDscp->activeRPCs);
4048 osi_Log2(afsd_logp, "CALL Rename old scp 0x%p new scp 0x%p",
4051 code = cm_ConnFromFID(&oldDscp->fid, userp, reqp, &connp);
4055 oldDirAFSFid.Volume = oldDscp->fid.volume;
4056 oldDirAFSFid.Vnode = oldDscp->fid.vnode;
4057 oldDirAFSFid.Unique = oldDscp->fid.unique;
4058 newDirAFSFid.Volume = newDscp->fid.volume;
4059 newDirAFSFid.Vnode = newDscp->fid.vnode;
4060 newDirAFSFid.Unique = newDscp->fid.unique;
4062 rxconnp = cm_GetRxConn(connp);
4063 code = RXAFS_Rename(rxconnp, &oldDirAFSFid, oldNamep,
4064 &newDirAFSFid, newNamep,
4065 &updatedOldDirStatus, &updatedNewDirStatus,
4067 rx_PutConnection(rxconnp);
4069 } while (cm_Analyze(connp, userp, reqp, &oldDscp->fid, NULL, 1,
4070 &updatedOldDirStatus, &volSync, NULL, NULL, code));
4071 code = cm_MapRPCError(code, reqp);
4074 osi_Log1(afsd_logp, "CALL Rename FAILURE, code 0x%x", code);
4076 osi_Log0(afsd_logp, "CALL Rename SUCCESS");
4079 /* update the individual stat cache entries for the directories */
4081 lock_ObtainWrite(&oldDirOp.scp->dirlock);
4082 oldDirOp.lockType = CM_DIRLOCK_WRITE;
4085 lock_ObtainWrite(&oldDscp->rw);
4087 code = cm_MergeStatus( NULL, oldDscp, &updatedOldDirStatus, &volSync,
4088 userp, reqp, CM_MERGEFLAG_DIROP);
4089 if (cm_CheckDirOpForSingleChange(&oldDirOp)) {
4090 lock_ReleaseWrite(&oldDscp->rw);
4091 if (bTargetExists && oneDir) {
4092 diropCode = cm_DirDeleteEntry(&oldDirOp, newNamep);
4094 cm_BPlusDirDeleteEntry(&oldDirOp, cNewNamep);
4099 diropCode = cm_BPlusDirLookup(&oldDirOp, cOldNamep, &fileFid);
4100 if (diropCode == CM_ERROR_INEXACT_MATCH)
4102 else if (diropCode == EINVAL)
4104 diropCode = cm_DirLookup(&oldDirOp, oldNamep, &fileFid);
4106 if (diropCode == 0) {
4108 diropCode = cm_DirCreateEntry(&oldDirOp, newNamep, &fileFid);
4110 cm_BPlusDirCreateEntry(&oldDirOp, cNewNamep, &fileFid);
4114 if (diropCode == 0) {
4115 diropCode = cm_DirDeleteEntry(&oldDirOp, oldNamep);
4117 cm_BPlusDirDeleteEntry(&oldDirOp, cOldNamep);
4121 lock_ObtainWrite(&oldDscp->rw);
4125 InterlockedDecrement(&oldDscp->activeRPCs);
4127 cm_SyncOpDone(oldDscp, NULL, CM_SCACHESYNC_STOREDATA);
4128 lock_ReleaseWrite(&oldDscp->rw);
4130 cm_EndDirOp(&oldDirOp);
4132 /* and update it for the new one, too, if necessary */
4135 lock_ObtainWrite(&newDirOp.scp->dirlock);
4136 newDirOp.lockType = CM_DIRLOCK_WRITE;
4138 lock_ObtainWrite(&newDscp->rw);
4140 code = cm_MergeStatus( NULL, newDscp, &updatedNewDirStatus, &volSync,
4141 userp, reqp, CM_MERGEFLAG_DIROP);
4144 * we only make the local change if we successfully made
4145 * the change in the old directory AND there was only one
4146 * change in the new directory
4148 if (diropCode == 0 && cm_CheckDirOpForSingleChange(&newDirOp)) {
4149 lock_ReleaseWrite(&newDscp->rw);
4151 if (bTargetExists && !oneDir) {
4152 diropCode = cm_DirDeleteEntry(&newDirOp, newNamep);
4154 cm_BPlusDirDeleteEntry(&newDirOp, cNewNamep);
4158 cm_DirCreateEntry(&newDirOp, newNamep, &fileFid);
4160 cm_BPlusDirCreateEntry(&newDirOp, cNewNamep, &fileFid);
4162 lock_ObtainWrite(&newDscp->rw);
4166 InterlockedIncrement(&newDscp->activeRPCs);
4168 cm_SyncOpDone(newDscp, NULL, CM_SCACHESYNC_STOREDATA);
4169 lock_ReleaseWrite(&newDscp->rw);
4171 cm_EndDirOp(&newDirOp);
4176 * After the rename the file server has invalidated the callbacks
4177 * on the file that was moved and destroyed any target file.
4179 lock_ObtainWrite(&oldScp->rw);
4180 cm_DiscardSCache(oldScp);
4181 lock_ReleaseWrite(&oldScp->rw);
4183 if (RDR_Initialized)
4184 RDR_InvalidateObject(oldScp->fid.cell, oldScp->fid.volume, oldScp->fid.vnode, oldScp->fid.unique,
4185 oldScp->fid.hash, oldScp->fileType, AFS_INVALIDATE_CALLBACK);
4188 lock_ObtainWrite(&oldTargetScp->rw);
4189 cm_DiscardSCache(oldTargetScp);
4190 lock_ReleaseWrite(&oldTargetScp->rw);
4192 if (RDR_Initialized)
4193 RDR_InvalidateObject(oldTargetScp->fid.cell, oldTargetScp->fid.volume, oldTargetScp->fid.vnode, oldTargetScp->fid.unique,
4194 oldTargetScp->fid.hash, oldTargetScp->fileType, AFS_INVALIDATE_CALLBACK);
4200 cm_ReleaseSCache(oldScp);
4203 cm_ReleaseSCache(oldTargetScp);
4210 /* and return error code */
4214 /* Byte range locks:
4216 The OpenAFS Windows client has to fake byte range locks given no
4217 server side support for such locks. This is implemented as keyed
4218 byte range locks on the cache manager.
4220 Keyed byte range locks:
4222 Each cm_scache_t structure keeps track of a list of keyed locks.
4223 The key for a lock identifies an owner of a set of locks (referred
4224 to as a client). Each key is represented by a value. The set of
4225 key values used within a specific cm_scache_t structure form a
4226 namespace that has a scope of just that cm_scache_t structure. The
4227 same key value can be used with another cm_scache_t structure and
4228 correspond to a completely different client. However it is
4229 advantageous for the SMB or IFS layer to make sure that there is a
4230 1-1 mapping between client and keys over all cm_scache_t objects.
4232 Assume a client C has key Key(C) (although, since the scope of the
4233 key is a cm_scache_t, the key can be Key(C,S), where S is the
4234 cm_scache_t. But assume a 1-1 relation between keys and clients).
4235 A byte range (O,+L) denotes byte addresses (O) through (O+L-1)
4236 inclusive (a.k.a. [O,O+L-1]). The function Key(x) is implemented
4237 through cm_generateKey() function for both SMB and IFS.
4239 The list of locks for a cm_scache_t object S is maintained in
4240 S->fileLocks. The cache manager will set a lock on the AFS file
4241 server in order to assert the locks in S->fileLocks. If only
4242 shared locks are in place for S, then the cache manager will obtain
4243 a LockRead lock, while if there are any exclusive locks, it will
4244 obtain a LockWrite lock. If the exclusive locks are all released
4245 while the shared locks remain, then the cache manager will
4246 downgrade the lock from LockWrite to LockRead. Similarly, if an
4247 exclusive lock is obtained when only shared locks exist, then the
4248 cache manager will try to upgrade the lock from LockRead to
4251 Each lock L owned by client C maintains a key L->key such that
4252 L->key == Key(C), the effective range defined by L->LOffset and
4253 L->LLength such that the range of bytes affected by the lock is
4254 (L->LOffset, +L->LLength), a type maintained in L->LockType which
4255 is either exclusive or shared.
4259 A lock exists iff it is in S->fileLocks for some cm_scache_t
4260 S. Existing locks are in one of the following states: ACTIVE,
4261 WAITLOCK, WAITUNLOCK, LOST, DELETED.
4263 The following sections describe each lock and the associated
4266 1. ACTIVE: A lock L is ACTIVE iff the cache manager has asserted
4267 the lock with the AFS file server. This type of lock can be
4268 exercised by a client to read or write to the locked region (as
4271 1.1 ACTIVE->LOST: When the AFS file server fails to extend a
4272 server lock that was required to assert the lock. Before
4273 marking the lock as lost, the cache manager checks if the file
4274 has changed on the server. If the file has not changed, then
4275 the cache manager will attempt to obtain a new server lock
4276 that is sufficient to assert the client side locks for the
4277 file. If any of these fail, the lock is marked as LOST.
4278 Otherwise, it is left as ACTIVE.
4280 1.2 ACTIVE->DELETED: Lock is released.
4282 2. WAITLOCK: A lock is in a WAITLOCK state if the cache manager
4283 grants the lock but the lock is yet to be asserted with the AFS
4284 file server. Once the file server grants the lock, the state
4285 will transition to an ACTIVE lock.
4287 2.1 WAITLOCK->ACTIVE: The server granted the lock.
4289 2.2 WAITLOCK->DELETED: Lock is abandoned, or timed out during
4292 2.3 WAITLOCK->LOST: One or more locks from this client were
4293 marked as LOST. No further locks will be granted to this
4294 client until all lost locks are removed.
4296 3. WAITUNLOCK: A lock is in a WAITUNLOCK state if the cache manager
4297 receives a request for a lock that conflicts with an existing
4298 ACTIVE or WAITLOCK lock. The lock will be placed in the queue
4299 and will be granted at such time the conflicting locks are
4300 removed, at which point the state will transition to either
4303 3.1 WAITUNLOCK->ACTIVE: The conflicting lock was removed. The
4304 current serverLock is sufficient to assert this lock, or a
4305 sufficient serverLock is obtained.
4307 3.2 WAITUNLOCK->WAITLOCK: The conflicting lock was removed,
4308 however the required serverLock is yet to be asserted with the
4311 3.3 WAITUNLOCK->DELETED: The lock is abandoned, timed out or
4314 3.5 WAITUNLOCK->LOST: One or more locks from this client were
4315 marked as LOST. No further locks will be granted to this
4316 client until all lost locks are removed.
4318 4. LOST: A lock L is LOST if the server lock that was required to
4319 assert the lock could not be obtained or if it could not be
4320 extended, or if other locks by the same client were LOST.
4321 Essentially, once a lock is LOST, the contract between the cache
4322 manager and that specific client is no longer valid.
4324 The cache manager rechecks the server lock once every minute and
4325 extends it as appropriate. If this is not done for 5 minutes,
4326 the AFS file server will release the lock (the 5 minute timeout
4327 is based on current file server code and is fairly arbitrary).
4328 Once released, the lock cannot be re-obtained without verifying
4329 that the contents of the file hasn't been modified since the
4330 time the lock was released. Re-obtaining the lock without
4331 verifying this may lead to data corruption. If the lock can not
4332 be obtained safely, then all active locks for the cm_scache_t
4335 4.1 LOST->DELETED: The lock is released.
4337 5. DELETED: The lock is no longer relevant. Eventually, it will
4338 get removed from the cm_scache_t. In the meantime, it will be
4339 treated as if it does not exist.
4341 5.1 DELETED->not exist: The lock is removed from the
4344 The following are classifications of locks based on their state.
4346 6* A lock L is ACCEPTED if it is ACTIVE or WAITLOCK. These locks
4347 have been accepted by the cache manager, but may or may not have
4348 been granted back to the client.
4350 7* A lock L is QUEUED if it is ACTIVE, WAITLOCK or WAITUNLOCK.
4352 8* A lock L is WAITING if it is WAITLOCK or WAITUNLOCK.
4356 A client C can READ range (Offset,+Length) of a file represented by
4357 cm_scache_t S iff (1):
4359 1. for all _a_ in (Offset,+Length), all of the following is true:
4361 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4362 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4365 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4366 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4369 (When locks are lost on an cm_scache_t, all locks are lost. By
4370 4.2 (below), if there is an exclusive LOST lock, then there
4371 can't be any overlapping ACTIVE locks.)
4373 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4375 2. for all _a_ in (Offset,+Length), one of the following is true:
4377 2.1 Byte _a_ of S is unowned (as specified in 1.1) AND there
4378 does not exist a LOST lock L such that _a_ in
4379 (L->LOffset,+L->LLength).
4381 2.2 Byte _a_ of S is owned by C under lock L (as specified in
4382 1.2) AND L->LockType is exclusive.
4384 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4386 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4389 3.1 If L->LockType is exclusive then there does NOT exist a
4390 ACCEPTED lock M in S->fileLocks such that _a_ in
4391 (M->LOffset,+M->LLength).
4393 (If we count all QUEUED locks then we hit cases such as
4394 cascading waiting locks where the locks later on in the queue
4395 can be granted without compromising file integrity. On the
4396 other hand if only ACCEPTED locks are considered, then locks
4397 that were received earlier may end up waiting for locks that
4398 were received later to be unlocked. The choice of ACCEPTED
4399 locks was made to mimic the Windows byte range lock
4402 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4403 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4404 M->LockType is shared.
4406 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4408 4.1 M->key != Key(C)
4410 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4411 and (M->LOffset,+M->LLength) do not intersect.
4413 (Note: If a client loses a lock, it loses all locks.
4414 Subsequently, it will not be allowed to obtain any more locks
4415 until all existing LOST locks that belong to the client are
4416 released. Once all locks are released by a single client,
4417 there exists no further contract between the client and AFS
4418 about the contents of the file, hence the client can then
4419 proceed to obtain new locks and establish a new contract.
4421 This doesn't quite work as you think it should, because most
4422 applications aren't built to deal with losing locks they
4423 thought they once had. For now, we don't have a good
4424 solution to lost locks.
4426 Also, for consistency reasons, we have to hold off on
4427 granting locks that overlap exclusive LOST locks.)
4429 A client C can only unlock locks L in S->fileLocks which have
4432 The representation and invariants are as follows:
4434 - Each cm_scache_t structure keeps:
4436 - A queue of byte-range locks (cm_scache_t::fileLocks) which
4437 are of type cm_file_lock_t.
4439 - A record of the highest server-side lock that has been
4440 obtained for this object (cm_scache_t::serverLock), which is
4441 one of (-1), LockRead, LockWrite.
4443 - A count of ACCEPTED exclusive and shared locks that are in the
4444 queue (cm_scache_t::sharedLocks and
4445 cm_scache_t::exclusiveLocks)
4447 - Each cm_file_lock_t structure keeps:
4449 - The type of lock (cm_file_lock_t::LockType)
4451 - The key associated with the lock (cm_file_lock_t::key)
4453 - The offset and length of the lock (cm_file_lock_t::LOffset
4454 and cm_file_lock_t::LLength)
4456 - The state of the lock.
4458 - Time of issuance or last successful extension
4460 Semantic invariants:
4462 I1. The number of ACCEPTED locks in S->fileLocks are
4463 (S->sharedLocks + S->exclusiveLocks)
4465 External invariants:
4467 I3. S->serverLock is the lock that we have asserted with the
4468 AFS file server for this cm_scache_t.
4470 I4. S->serverLock == LockRead iff there is at least one ACTIVE
4471 shared lock, but no ACTIVE exclusive locks.
4473 I5. S->serverLock == LockWrite iff there is at least one ACTIVE
4476 I6. If L is a LOST lock, then for each lock M in S->fileLocks,
4477 M->key == L->key IMPLIES M is LOST or DELETED.
4482 #define IS_LOCK_ACTIVE(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == 0)
4484 #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)
4486 #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)
4488 #define IS_LOCK_LOST(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_LOST)
4490 #define IS_LOCK_DELETED(lockp) (((lockp)->flags & CM_FILELOCK_FLAG_DELETED) == CM_FILELOCK_FLAG_DELETED)
4493 #define IS_LOCK_ACCEPTED(lockp) (IS_LOCK_ACTIVE(lockp) || IS_LOCK_WAITLOCK(lockp))
4496 #define IS_LOCK_CLIENTONLY(lockp) ((((lockp)->scp->flags & CM_SCACHEFLAG_RO) == CM_SCACHEFLAG_RO) || (((lockp)->flags & CM_FILELOCK_FLAG_CLIENTONLY) == CM_FILELOCK_FLAG_CLIENTONLY))
4499 #define INTERSECT_RANGE(r1,r2) (((r2).offset+(r2).length) > (r1).offset && ((r1).offset +(r1).length) > (r2).offset)
4502 #define CONTAINS_RANGE(r1,r2) (((r2).offset+(r2).length) <= ((r1).offset+(r1).length) && (r1).offset <= (r2).offset)
4504 #if defined(VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS) && !defined(LOCK_TESTING)
4505 #define SCP_SUPPORTS_BRLOCKS(scp) ((scp)->cbServerp && ((scp)->cbServerp->capabilities & VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS))
4507 #define SCP_SUPPORTS_BRLOCKS(scp) (1)
4510 #define SERVERLOCKS_ENABLED(scp) (!((scp)->flags & CM_SCACHEFLAG_RO) && cm_enableServerLocks && SCP_SUPPORTS_BRLOCKS(scp))
4512 #if defined(VICED_CAPABILITY_WRITELOCKACL)
4513 #define SCP_SUPPORTS_WRITELOCKACL(scp) ((scp)->cbServerp && ((scp->cbServerp->capabilities & VICED_CAPABILITY_WRITELOCKACL)))
4515 #define SCP_SUPPORTS_WRITELOCKACL(scp) (0)
4517 /* This should really be defined in any build that this code is being
4519 #error VICED_CAPABILITY_WRITELOCKACL not defined.
4522 static void cm_LockRangeSubtract(cm_range_t * pos, const cm_range_t * neg)
4524 afs_int64 int_begin;
4527 int_begin = max(pos->offset, neg->offset);
4528 int_end = min(pos->offset+pos->length, neg->offset+neg->length);
4530 if (int_begin < int_end) {
4531 if (int_begin == pos->offset) {
4532 pos->length = pos->offset + pos->length - int_end;
4533 pos->offset = int_end;
4534 } else if (int_end == pos->offset + pos->length) {
4535 pos->length = int_begin - pos->offset;
4538 /* We only subtract ranges if the resulting range is
4539 contiguous. If we try to support non-contigous ranges, we
4540 aren't actually improving performance. */
4544 /* Called with scp->rw held. Returns 0 if all is clear to read the
4545 specified range by the client identified by key.
4547 long cm_LockCheckRead(cm_scache_t *scp,
4548 LARGE_INTEGER LOffset,
4549 LARGE_INTEGER LLength,
4552 #ifndef ADVISORY_LOCKS
4554 cm_file_lock_t *fileLock;
4558 int substract_ranges = FALSE;
4560 range.offset = LOffset.QuadPart;
4561 range.length = LLength.QuadPart;
4565 1. for all _a_ in (Offset,+Length), all of the following is true:
4567 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4568 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4571 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4572 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4577 lock_ObtainRead(&cm_scacheLock);
4579 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4581 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4583 if (INTERSECT_RANGE(range, fileLock->range)) {
4584 if (IS_LOCK_ACTIVE(fileLock)) {
4585 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4587 /* If there is an active lock for this client, it
4588 is safe to substract ranges.*/
4589 cm_LockRangeSubtract(&range, &fileLock->range);
4590 substract_ranges = TRUE;
4592 if (fileLock->lockType != LockRead) {
4593 code = CM_ERROR_LOCK_CONFLICT;
4597 /* even if the entire range is locked for reading,
4598 we still can't grant the lock at this point
4599 because the client may have lost locks. That
4600 is, unless we have already seen an active lock
4601 belonging to the client, in which case there
4602 can't be any lost locks for this client. */
4603 if (substract_ranges)
4604 cm_LockRangeSubtract(&range, &fileLock->range);
4606 } else if (IS_LOCK_LOST(fileLock) &&
4607 (cm_KeyEquals(&fileLock->key, &key, 0) || fileLock->lockType == LockWrite)) {
4608 code = CM_ERROR_BADFD;
4614 lock_ReleaseRead(&cm_scacheLock);
4616 osi_Log4(afsd_logp, "cm_LockCheckRead scp 0x%x offset %d length %d code 0x%x",
4617 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4628 /* Called with scp->rw held. Returns 0 if all is clear to write the
4629 specified range by the client identified by key.
4631 long cm_LockCheckWrite(cm_scache_t *scp,
4632 LARGE_INTEGER LOffset,
4633 LARGE_INTEGER LLength,
4636 #ifndef ADVISORY_LOCKS
4638 cm_file_lock_t *fileLock;
4643 range.offset = LOffset.QuadPart;
4644 range.length = LLength.QuadPart;
4647 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4649 2. for all _a_ in (Offset,+Length), one of the following is true:
4651 2.1 Byte _a_ of S is unowned AND there does not exist a LOST
4652 lock L such that _a_ in (L->LOffset,+L->LLength).
4654 2.2 Byte _a_ of S is owned by C under lock L AND L->LockType is
4658 lock_ObtainRead(&cm_scacheLock);
4660 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4662 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4664 if (INTERSECT_RANGE(range, fileLock->range)) {
4665 if (IS_LOCK_ACTIVE(fileLock)) {
4666 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4667 if (fileLock->lockType == LockWrite) {
4669 /* if there is an active lock for this client, it
4670 is safe to substract ranges */
4671 cm_LockRangeSubtract(&range, &fileLock->range);
4673 code = CM_ERROR_LOCK_CONFLICT;
4677 code = CM_ERROR_LOCK_CONFLICT;
4680 } else if (IS_LOCK_LOST(fileLock)) {
4681 code = CM_ERROR_BADFD;
4687 lock_ReleaseRead(&cm_scacheLock);
4689 osi_Log4(afsd_logp, "cm_LockCheckWrite scp 0x%x offset %d length %d code 0x%x",
4690 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4701 /* Called with cm_scacheLock write locked */
4702 static cm_file_lock_t * cm_GetFileLock(void) {
4705 l = (cm_file_lock_t *) cm_freeFileLocks;
4707 osi_QRemove(&cm_freeFileLocks, &l->q);
4709 l = malloc(sizeof(cm_file_lock_t));
4710 osi_assertx(l, "null cm_file_lock_t");
4713 memset(l, 0, sizeof(cm_file_lock_t));
4718 /* Called with cm_scacheLock write locked */
4719 static void cm_PutFileLock(cm_file_lock_t *l) {
4720 osi_QAdd(&cm_freeFileLocks, &l->q);
4723 /* called with scp->rw held. May release it during processing, but
4724 leaves it held on exit. */
4725 long cm_IntSetLock(cm_scache_t * scp, cm_user_t * userp, int lockType,
4731 struct rx_connection * rxconnp;
4733 afs_uint32 reqflags = reqp->flags;
4735 osi_Log2(afsd_logp, "CALL SetLock scp 0x%p for lock %d", scp, lockType);
4739 * The file server prior to 1.6.2 does not report an accurate value
4740 * and callbacks are not issued if the lock is dropped due to expiration.
4742 if ((lockType != LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount != 0) ||
4743 (lockType == LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount < 0))
4745 code = CM_ERROR_LOCK_NOT_GRANTED;
4746 osi_Log2(afsd_logp, "CALL SetLock FAILURE, fsLockCount %d code 0x%x", scp->fsLockCount, code);
4751 memset(&volSync, 0, sizeof(volSync));
4753 tfid.Volume = scp->fid.volume;
4754 tfid.Vnode = scp->fid.vnode;
4755 tfid.Unique = scp->fid.unique;
4758 reqp->flags |= CM_REQ_NORETRY;
4759 lock_ReleaseWrite(&scp->rw);
4762 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4766 rxconnp = cm_GetRxConn(connp);
4767 code = RXAFS_SetLock(rxconnp, &tfid, lockType,
4769 rx_PutConnection(rxconnp);
4771 } while (cm_Analyze(connp, userp, reqp, &cfid, NULL, 1, NULL, &volSync,
4774 code = cm_MapRPCError(code, reqp);
4776 osi_Log1(afsd_logp, "CALL SetLock FAILURE, code 0x%x", code);
4778 osi_Log0(afsd_logp, "CALL SetLock SUCCESS");
4781 reqp->flags = reqflags;
4783 lock_ObtainWrite(&scp->rw);
4786 * The file server does not return a status structure so we must
4787 * locally track the file server lock count to the best of our
4790 if (lockType == LockWrite)
4791 scp->fsLockCount = -1;
4798 /* called with scp->rw held. Releases it during processing */
4799 long cm_IntReleaseLock(cm_scache_t * scp, cm_user_t * userp,
4805 struct rx_connection * rxconnp;
4808 if (scp->flags & CM_SCACHEFLAG_DELETED) {
4809 osi_Log1(afsd_logp, "CALL ReleaseLock on Deleted Vnode scp 0x%p", scp);
4813 memset(&volSync, 0, sizeof(volSync));
4815 tfid.Volume = scp->fid.volume;
4816 tfid.Vnode = scp->fid.vnode;
4817 tfid.Unique = scp->fid.unique;
4820 lock_ReleaseWrite(&scp->rw);
4822 osi_Log1(afsd_logp, "CALL ReleaseLock scp 0x%p", scp);
4825 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4829 rxconnp = cm_GetRxConn(connp);
4830 code = RXAFS_ReleaseLock(rxconnp, &tfid, &volSync);
4831 rx_PutConnection(rxconnp);
4833 } while (cm_Analyze(connp, userp, reqp, &cfid, NULL, 1, NULL, &volSync,
4835 code = cm_MapRPCError(code, reqp);
4838 "CALL ReleaseLock FAILURE, code 0x%x", code);
4841 "CALL ReleaseLock SUCCESS");
4843 lock_ObtainWrite(&scp->rw);
4846 * The file server does not return a status structure so we must
4847 * locally track the file server lock count to the best of our
4851 if (scp->fsLockCount < 0)
4852 scp->fsLockCount = 0;
4855 return (code != CM_ERROR_BADFD ? code : 0);
4858 /* called with scp->rw held. May release it during processing, but
4859 will exit with lock held.
4863 - 0 if the user has permission to get the specified lock for the scp
4865 - CM_ERROR_NOACCESS if not
4867 Any other error from cm_SyncOp will be sent down untranslated.
4869 If CM_ERROR_NOACCESS is returned and lock_type is LockRead, then
4870 phas_insert (if non-NULL) will receive a boolean value indicating
4871 whether the user has INSERT permission or not.
4873 long cm_LockCheckPerms(cm_scache_t * scp,
4880 long code = 0, code2 = 0;
4882 /* lock permissions are slightly tricky because of the 'i' bit.
4883 If the user has PRSFS_LOCK, she can read-lock the file. If the
4884 user has PRSFS_WRITE, she can write-lock the file. However, if
4885 the user has PRSFS_INSERT, then she can write-lock new files,
4886 but not old ones. Since we don't have information about
4887 whether a file is new or not, we assume that if the user owns
4888 the scp, then she has the permissions that are granted by
4891 osi_Log3(afsd_logp, "cm_LockCheckPerms for scp[0x%p] type[%d] user[0x%p]",
4892 scp, lock_type, userp);
4894 if (lock_type == LockRead)
4895 rights |= PRSFS_LOCK;
4896 else if (lock_type == LockWrite)
4897 rights |= PRSFS_WRITE | PRSFS_LOCK;
4900 osi_assertx(FALSE, "invalid lock type");
4905 *phas_insert = FALSE;
4907 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
4908 CM_SCACHESYNC_GETSTATUS |
4909 CM_SCACHESYNC_NEEDCALLBACK);
4911 if (phas_insert && scp->creator == userp) {
4913 /* If this file was created by the user, then we check for
4914 PRSFS_INSERT. If the file server is recent enough, then
4915 this should be sufficient for her to get a write-lock (but
4916 not necessarily a read-lock). VICED_CAPABILITY_WRITELOCKACL
4917 indicates whether a file server supports getting write
4918 locks when the user only has PRSFS_INSERT.
4920 If the file was not created by the user we skip the check
4921 because the INSERT bit will not apply to this user even
4925 code2 = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
4926 CM_SCACHESYNC_GETSTATUS |
4927 CM_SCACHESYNC_NEEDCALLBACK);
4929 if (code2 == CM_ERROR_NOACCESS) {
4930 osi_Log0(afsd_logp, "cm_LockCheckPerms user has no INSERT bits");
4932 *phas_insert = TRUE;
4933 osi_Log0(afsd_logp, "cm_LockCheckPerms user has INSERT bits");
4937 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
4939 osi_Log1(afsd_logp, "cm_LockCheckPerms returning code %d", code);
4944 /* called with scp->rw held */
4945 long cm_Lock(cm_scache_t *scp, unsigned char sLockType,
4946 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
4948 int allowWait, cm_user_t *userp, cm_req_t *reqp,
4949 cm_file_lock_t **lockpp)
4952 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
4953 cm_file_lock_t *fileLock;
4956 int wait_unlock = FALSE;
4957 int force_client_lock = FALSE;
4959 osi_Log4(afsd_logp, "cm_Lock scp 0x%x type 0x%x offset %d length %d",
4960 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
4961 osi_Log4(afsd_logp, "... allowWait %d key <0x%x, 0x%x, 0x%x>", allowWait,
4962 key.process_id, key.session_id, key.file_id);
4965 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4967 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4970 3.1 If L->LockType is exclusive then there does NOT exist a
4971 ACCEPTED lock M in S->fileLocks such that _a_ in
4972 (M->LOffset,+M->LLength).
4974 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4975 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4976 M->LockType is shared.
4978 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4980 4.1 M->key != Key(C)
4982 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4983 and (M->LOffset,+M->LLength) do not intersect.
4986 range.offset = LOffset.QuadPart;
4987 range.length = LLength.QuadPart;
4989 lock_ObtainRead(&cm_scacheLock);
4991 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
4993 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4995 if (IS_LOCK_LOST(fileLock)) {
4996 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4997 code = CM_ERROR_BADFD;
4999 } else if (fileLock->lockType == LockWrite && INTERSECT_RANGE(range, fileLock->range)) {
5000 code = CM_ERROR_WOULDBLOCK;
5006 /* we don't need to check for deleted locks here since deleted
5007 locks are dequeued from scp->fileLocks */
5008 if (IS_LOCK_ACCEPTED(fileLock) &&
5009 INTERSECT_RANGE(range, fileLock->range)) {
5011 if ((sLockType & LOCKING_ANDX_SHARED_LOCK) == 0 ||
5012 fileLock->lockType != LockRead) {
5014 code = CM_ERROR_WOULDBLOCK;
5020 lock_ReleaseRead(&cm_scacheLock);
5022 if (code == 0 && SERVERLOCKS_ENABLED(scp)) {
5023 if (Which == scp->serverLock ||
5024 (Which == LockRead && scp->serverLock == LockWrite)) {
5028 /* we already have the lock we need */
5029 osi_Log3(afsd_logp, " we already have the correct lock. exclusives[%d], shared[%d], serverLock[%d]",
5030 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5032 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
5034 /* special case: if we don't have permission to read-lock
5035 the file, then we force a clientside lock. This is to
5036 compensate for applications that obtain a read-lock for
5037 reading files off of directories that don't grant
5038 read-locks to the user. */
5039 if (code == CM_ERROR_NOACCESS && Which == LockRead) {
5041 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
5042 osi_Log0(afsd_logp, " User has no read-lock perms, but has INSERT perms.");
5045 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
5046 force_client_lock = TRUE;
5050 } else if ((scp->exclusiveLocks > 0) ||
5051 (scp->sharedLocks > 0 && scp->serverLock != LockRead)) {
5054 /* We are already waiting for some other lock. We should
5055 wait for the daemon to catch up instead of generating a
5056 flood of SetLock calls. */
5057 osi_Log3(afsd_logp, " already waiting for other lock. exclusives[%d], shared[%d], serverLock[%d]",
5058 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5060 /* see if we have permission to create the lock in the
5062 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
5064 code = CM_ERROR_WOULDBLOCK;
5065 else if (code == CM_ERROR_NOACCESS && Which == LockRead) {
5067 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
5069 " User has no read-lock perms, but has INSERT perms.");
5070 code = CM_ERROR_WOULDBLOCK;
5073 " User has no read-lock perms. Forcing client-side lock");
5074 force_client_lock = TRUE;
5078 /* leave any other codes as-is */
5082 int check_data_version = FALSE;
5085 /* first check if we have permission to elevate or obtain
5087 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
5089 if (code == CM_ERROR_NOACCESS && Which == LockRead &&
5090 (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp))) {
5091 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
5092 force_client_lock = TRUE;
5097 /* has_insert => (Which == LockRead, code == CM_ERROR_NOACCESS) */
5099 if (scp->serverLock == LockRead && Which == LockWrite) {
5101 /* We want to escalate the lock to a LockWrite.
5102 * Unfortunately that's not really possible without
5103 * letting go of the current lock. But for now we do
5107 " attempting to UPGRADE from LockRead to LockWrite.");
5109 " dataVersion on scp: %I64d", scp->dataVersion);
5111 /* we assume at this point (because scp->serverLock
5112 was valid) that we had a valid server lock. */
5113 scp->lockDataVersion = scp->dataVersion;
5114 check_data_version = TRUE;
5116 code = cm_IntReleaseLock(scp, userp, reqp);
5119 /* We couldn't release the lock */
5122 scp->serverLock = -1;
5126 /* We need to obtain a server lock of type Which in order
5127 * to assert this file lock */
5128 #ifndef AGGRESSIVE_LOCKS
5131 newLock = LockWrite;
5134 code = cm_IntSetLock(scp, userp, newLock, reqp);
5136 #ifdef AGGRESSIVE_LOCKS
5137 if ((code == CM_ERROR_WOULDBLOCK ||
5138 code == CM_ERROR_NOACCESS) && newLock != Which) {
5139 /* we wanted LockRead. We tried LockWrite. Now try
5144 osi_assertx(newLock == LockRead, "lock type not read");
5146 code = cm_IntSetLock(scp, userp, newLock, reqp);
5150 if (code == CM_ERROR_NOACCESS) {
5151 if (Which == LockRead) {
5152 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
5154 /* We requested a read-lock, but we have permission to
5155 * get a write-lock. Try that */
5157 tcode = cm_LockCheckPerms(scp, LockWrite, userp, reqp, NULL);
5160 newLock = LockWrite;
5162 osi_Log0(afsd_logp, " User has 'i' perms and the request was for a LockRead. Trying to get a LockWrite instead");
5164 code = cm_IntSetLock(scp, userp, newLock, reqp);
5167 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
5168 force_client_lock = TRUE;
5170 } else if (Which == LockWrite &&
5171 scp->creator == userp && !SCP_SUPPORTS_WRITELOCKACL(scp)) {
5174 /* Special case: if the lock request was for a
5175 * LockWrite and the user owns the file and we weren't
5176 * allowed to obtain the serverlock, we either lost a
5177 * race (the permissions changed from under us), or we
5178 * have 'i' bits, but we aren't allowed to lock the
5181 /* check if we lost a race... */
5182 tcode = cm_LockCheckPerms(scp, Which, userp, reqp, NULL);
5185 osi_Log0(afsd_logp, " User has 'i' perms but can't obtain write locks. Using client-side locks.");
5186 force_client_lock = TRUE;
5191 if (code == 0 && check_data_version &&
5192 scp->dataVersion != scp->lockDataVersion) {
5193 /* We lost a race. Although we successfully obtained
5194 * a lock, someone modified the file in between. The
5195 * locks have all been technically lost. */
5198 " Data version mismatch while upgrading lock.");
5200 " Data versions before=%I64d, after=%I64d",
5201 scp->lockDataVersion,
5204 " Releasing stale lock for scp 0x%x", scp);
5206 code = cm_IntReleaseLock(scp, userp, reqp);
5208 scp->serverLock = -1;
5210 code = CM_ERROR_INVAL;
5211 } else if (code == 0) {
5212 scp->serverLock = newLock;
5213 scp->lockDataVersion = scp->dataVersion;
5217 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5218 scp->serverLock == -1) {
5219 /* Oops. We lost the lock. */
5220 cm_LockMarkSCacheLost(scp);
5223 } else if (code == 0) { /* server locks not enabled */
5225 " Skipping server lock for scp");
5230 if (code != 0 && !force_client_lock) {
5231 /* Special case error translations
5233 Applications don't expect certain errors from a
5234 LockFile/UnlockFile call. We need to translate some error
5235 code to codes that apps expect and handle. */
5237 /* We shouldn't actually need to handle this case since we
5238 simulate locks for RO scps anyway. */
5239 if (code == CM_ERROR_READONLY) {
5240 osi_Log0(afsd_logp, " Reinterpreting CM_ERROR_READONLY as CM_ERROR_NOACCESS");
5241 code = CM_ERROR_NOACCESS;
5245 if (code == 0 || (code == CM_ERROR_WOULDBLOCK && allowWait) ||
5246 force_client_lock) {
5248 /* clear the error if we are forcing a client lock, so we
5249 don't get confused later. */
5250 if (force_client_lock && code != CM_ERROR_WOULDBLOCK)
5255 lock_ObtainWrite(&cm_scacheLock);
5256 fileLock = cm_GetFileLock();
5258 fileLock->fid = scp->fid;
5260 fileLock->key = key;
5261 fileLock->lockType = Which;
5262 fileLock->userp = userp;
5263 fileLock->range = range;
5264 fileLock->flags = (code == 0 ? 0 :
5266 CM_FILELOCK_FLAG_WAITUNLOCK :
5267 CM_FILELOCK_FLAG_WAITLOCK));
5269 if (force_client_lock || !SERVERLOCKS_ENABLED(scp))
5270 fileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
5272 fileLock->lastUpdate = (code == 0 && !force_client_lock) ? time(NULL) : 0;
5274 osi_QAddT(&scp->fileLocksH, &scp->fileLocksT, &fileLock->fileq);
5275 cm_HoldSCacheNoLock(scp);
5276 fileLock->scp = scp;
5277 osi_QAdd(&cm_allFileLocks, &fileLock->q);
5278 lock_ReleaseWrite(&cm_scacheLock);
5284 if (IS_LOCK_CLIENTONLY(fileLock)) {
5286 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5287 if (Which == LockRead)
5290 scp->exclusiveLocks++;
5294 "cm_Lock Lock added 0x%p flags 0x%x to scp [0x%p]",
5295 fileLock, fileLock->flags, scp);
5297 " exclusives[%d] shared[%d] client[%d] serverLock[%d]",
5298 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5299 (int)(signed char) scp->serverLock);
5302 "cm_Lock Rejecting lock (code = 0x%x)", code);
5305 /* Convert from would block to lock not granted */
5306 if (code == CM_ERROR_WOULDBLOCK)
5307 code = CM_ERROR_LOCK_NOT_GRANTED;
5313 cm_IntUnlock(cm_scache_t * scp,
5319 osi_assertx(scp->sharedLocks >= 0, "scp->sharedLocks < 0");
5320 osi_assertx(scp->exclusiveLocks >= 0, "scp->exclusiveLocks < 0");
5321 osi_assertx(scp->clientLocks >= 0, "scp->clientLocks < 0");
5323 if (!SERVERLOCKS_ENABLED(scp)) {
5324 osi_Log0(afsd_logp, " Skipping server lock for scp");
5328 /* Ideally we would go through the rest of the locks to determine
5329 * if one or more locks that were formerly in WAITUNLOCK can now
5330 * be put to ACTIVE or WAITLOCK and update scp->exclusiveLocks and
5331 * scp->sharedLocks accordingly. However, the retrying of locks
5332 * in that manner is done cm_RetryLock() manually.
5335 if (scp->serverLock == LockWrite &&
5336 scp->exclusiveLocks == 0 &&
5337 scp->sharedLocks > 0) {
5338 /* The serverLock should be downgraded to LockRead */
5339 osi_Log0(afsd_logp, " DOWNGRADE lock from LockWrite to LockRead");
5341 /* Make sure there are no dirty buffers left. */
5342 code = cm_FSync(scp, userp, reqp, TRUE);
5344 /* since scp->serverLock looked sane, we are going to assume
5345 that we have a valid server lock. */
5346 scp->lockDataVersion = scp->dataVersion;
5347 osi_Log1(afsd_logp, " dataVersion on scp = %I64d", scp->dataVersion);
5349 /* before we downgrade, make sure that we have enough
5350 permissions to get the read lock. */
5351 code = cm_LockCheckPerms(scp, LockRead, userp, reqp, NULL);
5354 osi_Log0(afsd_logp, " SKIPPING downgrade because user doesn't have perms to get downgraded lock");
5360 code = cm_IntReleaseLock(scp, userp, reqp);
5363 /* so we couldn't release it. Just let the lock be for now */
5367 scp->serverLock = -1;
5370 code = cm_IntSetLock(scp, userp, LockRead, reqp);
5372 if (code == 0 && scp->lockDataVersion == scp->dataVersion) {
5373 scp->serverLock = LockRead;
5374 } else if (code == 0 && scp->lockDataVersion != scp->dataVersion) {
5375 /* We lost a race condition. Although we have a valid
5376 lock on the file, the data has changed and essentially
5377 we have lost the lock we had during the transition. */
5379 osi_Log0(afsd_logp, "Data version mismatch during lock downgrade");
5380 osi_Log2(afsd_logp, " Data versions before=%I64d, after=%I64d",
5381 scp->lockDataVersion,
5384 code = cm_IntReleaseLock(scp, userp, reqp);
5386 code = CM_ERROR_INVAL;
5387 scp->serverLock = -1;
5391 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5392 (scp->serverLock == -1)) {
5394 cm_LockMarkSCacheLost(scp);
5397 /* failure here has no bearing on the return value of cm_Unlock() */
5400 } else if (scp->serverLock != (-1) &&
5401 scp->exclusiveLocks == 0 &&
5402 scp->sharedLocks == 0) {
5403 /* The serverLock should be released entirely */
5405 if (scp->serverLock == LockWrite) {
5406 osi_Log0(afsd_logp, " RELEASE LockWrite -> LockNone");
5408 /* Make sure there are no dirty buffers left. */
5409 code = cm_FSync(scp, userp, reqp, TRUE);
5411 osi_Log0(afsd_logp, " RELEASE LockRead -> LockNone");
5414 code = cm_IntReleaseLock(scp, userp, reqp);
5417 scp->serverLock = (-1);
5423 /* Called with scp->rw held */
5424 long cm_UnlockByKey(cm_scache_t * scp,
5431 cm_file_lock_t *fileLock;
5432 osi_queue_t *q, *qn;
5435 osi_Log4(afsd_logp, "cm_UnlockByKey scp 0x%p key <0x%x,0x%x,0x%x",
5436 scp, key.process_id, key.session_id, key.file_id);
5437 osi_Log1(afsd_logp, " flags=0x%x", flags);
5439 lock_ObtainWrite(&cm_scacheLock);
5441 for (q = scp->fileLocksH; q; q = qn) {
5444 fileLock = (cm_file_lock_t *)
5445 ((char *) q - offsetof(cm_file_lock_t, fileq));
5448 osi_Log4(afsd_logp, " Checking lock[0x%x] range[%d,+%d] type[%d]",
5450 (unsigned long) fileLock->range.offset,
5451 (unsigned long) fileLock->range.length,
5452 fileLock->lockType);
5453 osi_Log4(afsd_logp, " key<0x%x, 0x%x, 0x%x> flags[0x%x]",
5454 fileLock->key.process_id, fileLock->key.session_id, fileLock->key.file_id,
5457 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5458 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5459 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5461 fileLock->fid.volume,
5462 fileLock->fid.vnode,
5463 fileLock->fid.unique);
5464 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5465 fileLock->scp->fid.cell,
5466 fileLock->scp->fid.volume,
5467 fileLock->scp->fid.vnode,
5468 fileLock->scp->fid.unique);
5469 osi_assertx(FALSE, "invalid fid value");
5473 if (!IS_LOCK_DELETED(fileLock) &&
5474 cm_KeyEquals(&fileLock->key, &key, flags)) {
5475 osi_Log3(afsd_logp, "...Unlock range [%d,+%d] type %d",
5476 fileLock->range.offset,
5477 fileLock->range.length,
5478 fileLock->lockType);
5480 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5482 if (IS_LOCK_CLIENTONLY(fileLock)) {
5484 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5485 if (fileLock->lockType == LockRead)
5488 scp->exclusiveLocks--;
5491 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5493 cm_ReleaseUser(fileLock->userp);
5494 cm_ReleaseSCacheNoLock(scp);
5496 fileLock->userp = NULL;
5497 fileLock->scp = NULL;
5503 lock_ReleaseWrite(&cm_scacheLock);
5505 if (n_unlocks == 0) {
5506 osi_Log0(afsd_logp, "cm_UnlockByKey no locks found");
5507 osi_Log3(afsd_logp, " Leaving scp with exclusives[%d], shared[%d], serverLock[%d]",
5508 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5513 code = cm_IntUnlock(scp, userp, reqp);
5514 osi_Log1(afsd_logp, "cm_UnlockByKey code 0x%x", code);
5516 osi_Log4(afsd_logp, " Leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5517 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5518 (int)(signed char) scp->serverLock);
5523 /* Called with scp->rw held */
5524 long cm_Unlock(cm_scache_t *scp,
5525 unsigned char sLockType,
5526 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
5533 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
5534 cm_file_lock_t *fileLock;
5536 int release_userp = FALSE;
5537 int exact_match = !(flags & CM_UNLOCK_FLAG_MATCH_RANGE);
5539 LARGE_INTEGER RangeEnd;
5541 osi_Log4(afsd_logp, "cm_Unlock scp 0x%p type 0x%x offset 0x%x length 0x%x",
5542 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
5543 osi_Log4(afsd_logp, "... key <0x%x,0x%x,0x%x> flags 0x%x",
5544 key.process_id, key.session_id, key.file_id, flags);
5547 RangeEnd.QuadPart = LOffset.QuadPart + LLength.QuadPart;
5550 lock_ObtainRead(&cm_scacheLock);
5552 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5553 fileLock = (cm_file_lock_t *)
5554 ((char *) q - offsetof(cm_file_lock_t, fileq));
5557 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5558 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5559 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5561 fileLock->fid.volume,
5562 fileLock->fid.vnode,
5563 fileLock->fid.unique);
5564 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5565 fileLock->scp->fid.cell,
5566 fileLock->scp->fid.volume,
5567 fileLock->scp->fid.vnode,
5568 fileLock->scp->fid.unique);
5569 osi_assertx(FALSE, "invalid fid value");
5573 if (!IS_LOCK_DELETED(fileLock) &&
5574 cm_KeyEquals(&fileLock->key, &key, 0) &&
5575 fileLock->range.offset == LOffset.QuadPart &&
5576 fileLock->range.length == LLength.QuadPart) {
5582 if (!IS_LOCK_DELETED(fileLock) &&
5583 cm_KeyEquals(&fileLock->key, &key, 0) &&
5584 fileLock->range.offset >= LOffset.QuadPart &&
5585 fileLock->range.offset < RangeEnd.QuadPart &&
5586 (fileLock->range.offset + fileLock->range.length) <= RangeEnd.QuadPart) {
5594 lock_ReleaseRead(&cm_scacheLock);
5596 if (lock_found && !exact_match) {
5600 osi_Log0(afsd_logp, "cm_Unlock lock not found; failure");
5602 /* The lock didn't exist anyway. *shrug* */
5603 return CM_ERROR_RANGE_NOT_LOCKED;
5607 /* discard lock record */
5608 lock_ConvertRToW(&cm_scacheLock);
5609 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5612 * Don't delete it here; let the daemon delete it, to simplify
5613 * the daemon's traversal of the list.
5616 if (IS_LOCK_CLIENTONLY(fileLock)) {
5618 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5619 if (fileLock->lockType == LockRead)
5622 scp->exclusiveLocks--;
5625 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5627 if (userp != NULL) {
5628 cm_ReleaseUser(fileLock->userp);
5630 userp = fileLock->userp;
5631 release_userp = TRUE;
5633 cm_ReleaseSCacheNoLock(scp);
5634 fileLock->userp = NULL;
5635 fileLock->scp = NULL;
5636 lock_ReleaseWrite(&cm_scacheLock);
5638 code = cm_IntUnlock(scp, userp, reqp);
5640 if (release_userp) {
5641 cm_ReleaseUser(userp);
5642 release_userp = FALSE;
5646 osi_Log1(afsd_logp, "cm_Unlock not exact match, searching for next lock, code 0x%x", code);
5647 goto try_again; /* might be more than one lock in the range */
5652 osi_Log1(afsd_logp, "cm_Unlock code 0x%x", code);
5653 osi_Log4(afsd_logp, " leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5654 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5655 (int)(signed char) scp->serverLock);
5660 /* called with scp->rw held */
5661 void cm_LockMarkSCacheLost(cm_scache_t * scp)
5663 cm_file_lock_t *fileLock;
5666 osi_Log1(afsd_logp, "cm_LockMarkSCacheLost scp 0x%x", scp);
5668 /* cm_scacheLock needed because we are modifying fileLock->flags */
5669 lock_ObtainWrite(&cm_scacheLock);
5671 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5673 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
5675 if (IS_LOCK_ACTIVE(fileLock) &&
5676 !IS_LOCK_CLIENTONLY(fileLock)) {
5677 if (fileLock->lockType == LockRead)
5680 scp->exclusiveLocks--;
5682 fileLock->flags |= CM_FILELOCK_FLAG_LOST;
5686 scp->serverLock = -1;
5687 scp->lockDataVersion = CM_SCACHE_VERSION_BAD;
5688 lock_ReleaseWrite(&cm_scacheLock);
5691 /* Called with no relevant locks held */
5692 void cm_CheckLocks()
5694 osi_queue_t *q, *nq;
5695 cm_file_lock_t *fileLock;
5701 struct rx_connection * rxconnp;
5704 memset(&volSync, 0, sizeof(volSync));
5708 lock_ObtainWrite(&cm_scacheLock);
5710 cm_lockRefreshCycle++;
5712 osi_Log1(afsd_logp, "cm_CheckLocks starting lock check cycle %d", cm_lockRefreshCycle);
5714 for (q = cm_allFileLocks; q; q = nq) {
5715 fileLock = (cm_file_lock_t *) q;
5719 if (IS_LOCK_DELETED(fileLock)) {
5720 cm_user_t *userp = fileLock->userp;
5721 cm_scache_t *scp = fileLock->scp;
5722 fileLock->userp = NULL;
5723 fileLock->scp = NULL;
5726 lock_ReleaseWrite(&cm_scacheLock);
5727 lock_ObtainWrite(&scp->rw);
5728 code = cm_IntUnlock(scp, userp, &req);
5729 lock_ReleaseWrite(&scp->rw);
5731 cm_ReleaseUser(userp);
5732 lock_ObtainWrite(&cm_scacheLock);
5733 cm_ReleaseSCacheNoLock(scp);
5735 osi_QRemove(&cm_allFileLocks, q);
5736 cm_PutFileLock(fileLock);
5738 } else if (IS_LOCK_ACTIVE(fileLock) && !IS_LOCK_CLIENTONLY(fileLock)) {
5740 /* Server locks must have been enabled for us to have
5741 received an active non-client-only lock. */
5742 osi_assertx(cm_enableServerLocks, "!cm_enableServerLocks");
5744 scp = fileLock->scp;
5745 osi_assertx(scp != NULL, "null cm_scache_t");
5747 cm_HoldSCacheNoLock(scp);
5750 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5751 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5752 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5754 fileLock->fid.volume,
5755 fileLock->fid.vnode,
5756 fileLock->fid.unique);
5757 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5758 fileLock->scp->fid.cell,
5759 fileLock->scp->fid.volume,
5760 fileLock->scp->fid.vnode,
5761 fileLock->scp->fid.unique);
5762 osi_assertx(FALSE, "invalid fid");
5765 /* Server locks are extended once per scp per refresh
5767 if (scp->lastRefreshCycle != cm_lockRefreshCycle) {
5769 int scp_done = FALSE;
5771 osi_Log1(afsd_logp, "cm_CheckLocks Updating scp 0x%x", scp);
5773 lock_ReleaseWrite(&cm_scacheLock);
5774 lock_ObtainWrite(&scp->rw);
5776 /* did the lock change while we weren't holding the lock? */
5777 if (!IS_LOCK_ACTIVE(fileLock))
5778 goto post_syncopdone;
5780 code = cm_SyncOp(scp, NULL, fileLock->userp, &req, 0,
5781 CM_SCACHESYNC_LOCK);
5785 "cm_CheckLocks SyncOp failure code 0x%x", code);
5786 goto post_syncopdone;
5789 /* cm_SyncOp releases scp->rw during which the lock
5790 may get released. */
5791 if (!IS_LOCK_ACTIVE(fileLock))
5792 goto pre_syncopdone;
5794 if (scp->serverLock != -1 && !(scp->flags & CM_SCACHEFLAG_DELETED)) {
5798 tfid.Volume = scp->fid.volume;
5799 tfid.Vnode = scp->fid.vnode;
5800 tfid.Unique = scp->fid.unique;
5802 userp = fileLock->userp;
5804 osi_Log3(afsd_logp, "CALL ExtendLock lock 0x%p for scp=0x%p with lock %d",
5807 (int) scp->serverLock);
5809 lock_ReleaseWrite(&scp->rw);
5812 code = cm_ConnFromFID(&cfid, userp,
5817 rxconnp = cm_GetRxConn(connp);
5818 code = RXAFS_ExtendLock(rxconnp, &tfid,
5820 rx_PutConnection(rxconnp);
5822 osi_Log1(afsd_logp, " ExtendLock returns %d", code);
5824 } while (cm_Analyze(connp, userp, &req,
5825 &cfid, NULL, 1, NULL, &volSync, NULL, NULL,
5828 code = cm_MapRPCError(code, &req);
5830 lock_ObtainWrite(&scp->rw);
5833 osi_Log1(afsd_logp, "CALL ExtendLock FAILURE, code 0x%x", code);
5834 scp->fsLockCount = 0;
5836 osi_Log0(afsd_logp, "CALL ExtendLock SUCCESS");
5837 scp->lockDataVersion = scp->dataVersion;
5840 if ((code == EINVAL || code == CM_ERROR_INVAL) &&
5841 scp->lockDataVersion == scp->dataVersion) {
5845 (scp->exclusiveLocks > 0) ? LockWrite: LockRead;
5847 /* we might still have a chance to obtain a
5850 code = cm_IntSetLock(scp, userp, lockType, &req);
5853 code = CM_ERROR_INVAL;
5854 } else if (scp->lockDataVersion != scp->dataVersion) {
5856 /* now check if we still have the file at
5857 the right data version. */
5859 "Data version mismatch on scp 0x%p",
5862 " Data versions: before=%I64d, after=%I64d",
5863 scp->lockDataVersion,
5866 code = cm_IntReleaseLock(scp, userp, &req);
5868 code = CM_ERROR_INVAL;
5872 if (code == EINVAL || code == CM_ERROR_INVAL ||
5873 code == CM_ERROR_BADFD) {
5874 cm_LockMarkSCacheLost(scp);
5878 /* interestingly, we have found an active lock
5879 belonging to an scache that has no
5881 cm_LockMarkSCacheLost(scp);
5888 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
5891 lock_ReleaseWrite(&scp->rw);
5893 lock_ObtainWrite(&cm_scacheLock);
5896 fileLock->lastUpdate = time(NULL);
5900 scp->lastRefreshCycle = cm_lockRefreshCycle;
5903 /* we have already refreshed the locks on this scp */
5904 fileLock->lastUpdate = time(NULL);
5907 cm_ReleaseSCacheNoLock(scp);
5909 } else if (IS_LOCK_ACTIVE(fileLock) && IS_LOCK_CLIENTONLY(fileLock)) {
5910 /* TODO: Check callbacks */
5914 lock_ReleaseWrite(&cm_scacheLock);
5915 osi_Log1(afsd_logp, "cm_CheckLocks completes lock check cycle %d", cm_lockRefreshCycle);
5918 /* NOT called with scp->rw held. */
5919 long cm_RetryLock(cm_file_lock_t *oldFileLock, int client_is_dead)
5922 cm_scache_t *scp = NULL;
5923 cm_file_lock_t *fileLock;
5927 int force_client_lock = FALSE;
5928 int has_insert = FALSE;
5929 int check_data_version = FALSE;
5933 if (client_is_dead) {
5934 code = CM_ERROR_TIMEDOUT;
5938 lock_ObtainRead(&cm_scacheLock);
5940 osi_Log2(afsd_logp, "cm_RetryLock checking lock %p (scp=%p)", oldFileLock, oldFileLock->scp);
5941 osi_Log4(afsd_logp, " offset(%x:%x) length(%x:%x)",
5942 (unsigned)(oldFileLock->range.offset >> 32),
5943 (unsigned)(oldFileLock->range.offset & 0xffffffff),
5944 (unsigned)(oldFileLock->range.length >> 32),
5945 (unsigned)(oldFileLock->range.length & 0xffffffff));
5946 osi_Log4(afsd_logp, " key<0x%x,0x%x,0x%x> flags=%x",
5947 oldFileLock->key.process_id, oldFileLock->key.session_id, oldFileLock->key.file_id,
5948 (unsigned)(oldFileLock->flags));
5950 /* if the lock has already been granted, then we have nothing to do */
5951 if (IS_LOCK_ACTIVE(oldFileLock)) {
5952 lock_ReleaseRead(&cm_scacheLock);
5953 osi_Log0(afsd_logp, "cm_RetryLock lock already granted");
5957 /* we can't do anything with lost or deleted locks at the moment. */
5958 if (IS_LOCK_LOST(oldFileLock) || IS_LOCK_DELETED(oldFileLock)) {
5959 code = CM_ERROR_BADFD;
5960 osi_Log0(afsd_logp, "cm_RetryLock lock is lost or deleted");
5961 lock_ReleaseRead(&cm_scacheLock);
5965 scp = oldFileLock->scp;
5967 osi_assertx(scp != NULL, "null cm_scache_t");
5969 lock_ReleaseRead(&cm_scacheLock);
5970 lock_ObtainWrite(&scp->rw);
5972 code = cm_LockCheckPerms(scp, oldFileLock->lockType,
5976 if (code == CM_ERROR_NOACCESS && oldFileLock->lockType == LockRead) {
5977 if (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp)) {
5978 force_client_lock = TRUE;
5982 lock_ReleaseWrite(&scp->rw);
5986 lock_ObtainWrite(&cm_scacheLock);
5988 /* Check if we already have a sufficient server lock to allow this
5989 lock to go through. */
5990 if (IS_LOCK_WAITLOCK(oldFileLock) &&
5991 (!SERVERLOCKS_ENABLED(scp) ||
5992 scp->serverLock == oldFileLock->lockType ||
5993 scp->serverLock == LockWrite)) {
5995 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5997 if (SERVERLOCKS_ENABLED(scp)) {
5998 osi_Log1(afsd_logp, "cm_RetryLock Server lock (%d) is sufficient for lock. Granting",
5999 (int) scp->serverLock);
6001 osi_Log0(afsd_logp, "cm_RetryLock skipping server lock for scp");
6004 lock_ReleaseWrite(&cm_scacheLock);
6005 lock_ReleaseWrite(&scp->rw);
6010 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
6012 /* check if the conflicting locks have dissappeared already */
6013 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
6015 fileLock = (cm_file_lock_t *)
6016 ((char *) q - offsetof(cm_file_lock_t, fileq));
6018 if (IS_LOCK_LOST(fileLock)) {
6019 if (cm_KeyEquals(&fileLock->key, &oldFileLock->key, 0)) {
6020 code = CM_ERROR_BADFD;
6021 oldFileLock->flags |= CM_FILELOCK_FLAG_LOST;
6022 osi_Log1(afsd_logp, " found lost lock %p for same key. Marking lock as lost",
6025 } else if (fileLock->lockType == LockWrite &&
6026 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
6027 osi_Log1(afsd_logp, " found conflicting LOST lock %p", fileLock);
6028 code = CM_ERROR_WOULDBLOCK;
6033 if (IS_LOCK_ACCEPTED(fileLock) &&
6034 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
6036 if (oldFileLock->lockType != LockRead ||
6037 fileLock->lockType != LockRead) {
6039 osi_Log1(afsd_logp, " found conflicting lock %p", fileLock);
6040 code = CM_ERROR_WOULDBLOCK;
6048 lock_ReleaseWrite(&cm_scacheLock);
6049 lock_ReleaseWrite(&scp->rw);
6054 /* when we get here, the lock is either a WAITUNLOCK or WAITLOCK.
6055 If it is WAITUNLOCK, then we didn't find any conflicting lock
6056 but we haven't verfied whether the serverLock is sufficient to
6057 assert it. If it is WAITLOCK, then the serverLock is
6058 insufficient to assert it. Eitherway, we are ready to accept
6059 the lock as either ACTIVE or WAITLOCK depending on the
6062 /* First, promote the WAITUNLOCK to a WAITLOCK */
6063 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
6064 if (oldFileLock->lockType == LockRead)
6067 scp->exclusiveLocks++;
6069 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITUNLOCK;
6070 oldFileLock->flags |= CM_FILELOCK_FLAG_WAITLOCK;
6073 osi_assertx(IS_LOCK_WAITLOCK(oldFileLock), "!IS_LOCK_WAITLOCK");
6075 if (force_client_lock ||
6076 !SERVERLOCKS_ENABLED(scp) ||
6077 scp->serverLock == oldFileLock->lockType ||
6078 (oldFileLock->lockType == LockRead &&
6079 scp->serverLock == LockWrite)) {
6081 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
6083 if ((force_client_lock ||
6084 !SERVERLOCKS_ENABLED(scp)) &&
6085 !IS_LOCK_CLIENTONLY(oldFileLock)) {
6087 oldFileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
6089 if (oldFileLock->lockType == LockRead)
6092 scp->exclusiveLocks--;
6097 lock_ReleaseWrite(&cm_scacheLock);
6098 lock_ReleaseWrite(&scp->rw);
6105 code = cm_SyncOp(scp, NULL, oldFileLock->userp, &req, 0,
6106 CM_SCACHESYNC_LOCK);
6108 osi_Log1(afsd_logp, "cm_RetryLock SyncOp failure code 0x%x", code);
6109 lock_ReleaseWrite(&cm_scacheLock);
6110 goto post_syncopdone;
6113 if (!IS_LOCK_WAITLOCK(oldFileLock))
6114 goto pre_syncopdone;
6116 userp = oldFileLock->userp;
6118 #ifndef AGGRESSIVE_LOCKS
6119 newLock = oldFileLock->lockType;
6121 newLock = LockWrite;
6125 /* if has_insert is non-zero, then:
6126 - the lock a LockRead
6127 - we don't have permission to get a LockRead
6128 - we do have permission to get a LockWrite
6129 - the server supports VICED_CAPABILITY_WRITELOCKACL
6132 newLock = LockWrite;
6135 lock_ReleaseWrite(&cm_scacheLock);
6137 /* when we get here, either we have a read-lock and want a
6138 write-lock or we don't have any locks and we want some
6141 if (scp->serverLock == LockRead) {
6143 osi_assertx(newLock == LockWrite, "!LockWrite");
6145 osi_Log0(afsd_logp, " Attempting to UPGRADE from LockRead to LockWrite");
6147 scp->lockDataVersion = scp->dataVersion;
6148 check_data_version = TRUE;
6150 code = cm_IntReleaseLock(scp, userp, &req);
6153 goto pre_syncopdone;
6155 scp->serverLock = -1;
6158 code = cm_IntSetLock(scp, userp, newLock, &req);
6161 if (scp->dataVersion != scp->lockDataVersion) {
6162 /* we lost a race. too bad */
6165 " Data version mismatch while upgrading lock.");
6167 " Data versions before=%I64d, after=%I64d",
6168 scp->lockDataVersion,
6171 " Releasing stale lock for scp 0x%x", scp);
6173 code = cm_IntReleaseLock(scp, userp, &req);
6175 scp->serverLock = -1;
6177 code = CM_ERROR_INVAL;
6179 cm_LockMarkSCacheLost(scp);
6181 scp->serverLock = newLock;
6186 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
6192 if (code != 0 && code != CM_ERROR_WOULDBLOCK) {
6193 lock_ObtainWrite(&cm_scacheLock);
6194 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, &oldFileLock->fileq);
6195 lock_ReleaseWrite(&cm_scacheLock);
6197 lock_ReleaseWrite(&scp->rw);
6200 lock_ObtainWrite(&cm_scacheLock);
6202 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
6203 } else if (code != CM_ERROR_WOULDBLOCK) {
6204 oldFileLock->flags |= CM_FILELOCK_FLAG_DELETED;
6205 cm_ReleaseUser(oldFileLock->userp);
6206 oldFileLock->userp = NULL;
6207 if (oldFileLock->scp) {
6208 cm_ReleaseSCacheNoLock(oldFileLock->scp);
6209 oldFileLock->scp = NULL;
6212 lock_ReleaseWrite(&cm_scacheLock);
6217 cm_key_t cm_GenerateKey(afs_uint16 session_id, afs_offs_t process_id, afs_uint64 file_id)
6221 key.process_id = process_id;
6222 key.session_id = session_id;
6223 key.file_id = file_id;
6228 int cm_KeyEquals(cm_key_t *k1, cm_key_t *k2, int flags)
6230 return (k1->session_id == k2->session_id) && (k1->file_id == k2->file_id) &&
6231 ((flags & CM_UNLOCK_FLAG_BY_FID) || (k1->process_id == k2->process_id));
6234 void cm_ReleaseAllLocks(void)
6240 cm_file_lock_t *fileLock;
6243 for (i = 0; i < cm_data.scacheHashTableSize; i++)
6245 for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
6246 while (scp->fileLocksH != NULL) {
6247 lock_ObtainWrite(&scp->rw);
6248 lock_ObtainWrite(&cm_scacheLock);
6249 if (!scp->fileLocksH) {
6250 lock_ReleaseWrite(&cm_scacheLock);
6251 lock_ReleaseWrite(&scp->rw);
6254 fileLock = (cm_file_lock_t *)((char *) scp->fileLocksH - offsetof(cm_file_lock_t, fileq));
6255 userp = fileLock->userp;
6257 key = fileLock->key;
6258 cm_HoldSCacheNoLock(scp);
6259 lock_ReleaseWrite(&cm_scacheLock);
6260 cm_UnlockByKey(scp, key, 0, userp, &req);
6261 cm_ReleaseSCache(scp);
6262 cm_ReleaseUser(userp);
6263 lock_ReleaseWrite(&scp->rw);