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_NOSUCHVOLUME;
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_GetVolumeByFID(fidp);
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
2894 if (!(scp->mask & CM_SCACHEMASK_TRUNCPOS)
2895 || LargeIntegerLessThan(*sizep, scp->length)) {
2897 scp->truncPos = *sizep;
2898 scp->mask |= CM_SCACHEMASK_TRUNCPOS;
2900 /* in either case, the new file size has been changed */
2901 scp->length = *sizep;
2902 scp->mask |= CM_SCACHEMASK_LENGTH;
2904 else if (LargeIntegerGreaterThan(*sizep, scp->length)) {
2906 * Really extending the file so must check to see if we
2907 * have sufficient quota. cm_IsSpaceAvailable() obtains
2908 * the cm_scache.rw lock on the volume root directory.
2909 * vnode 1 < scp->fid.vnode therefore calling cm_IsSpaceAvailable
2910 * while holding scp->rw is a lock order violation.
2911 * Dropping it is ok because we are holding scp->bufCreateLock
2912 * which prevents the size of the file from changing.
2914 afs_uint64 nextChunk = scp->length.QuadPart;
2916 nextChunk -= (nextChunk & 0xFFFFF);
2917 nextChunk += 0x100000;
2919 if (sizep->QuadPart > nextChunk) {
2920 lock_ReleaseWrite(&scp->rw);
2921 available = cm_IsSpaceAvailable(&scp->fid, sizep, userp, reqp);
2922 lock_ObtainWrite(&scp->rw);
2925 * The file server permits 1MB quota overruns so only check
2926 * when the file size increases by at least that much.
2931 scp->length = *sizep;
2932 scp->mask |= CM_SCACHEMASK_LENGTH;
2934 code = CM_ERROR_SPACE;
2939 /* done successfully */
2943 cm_SyncOpDone(scp, NULL,
2944 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
2945 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
2948 lock_ReleaseWrite(&scp->rw);
2949 lock_ReleaseWrite(&scp->bufCreateLock);
2954 /* set the file size or other attributes (but not both at once) */
2955 long cm_SetAttr(cm_scache_t *scp, cm_attr_t *attrp, cm_user_t *userp,
2959 AFSFetchStatus afsOutStatus;
2963 AFSStoreStatus afsInStatus;
2964 struct rx_connection * rxconnp;
2966 memset(&volSync, 0, sizeof(volSync));
2968 /* handle file length setting */
2969 if (attrp->mask & CM_ATTRMASK_LENGTH)
2970 return cm_SetLength(scp, &attrp->length, userp, reqp);
2972 lock_ObtainWrite(&scp->rw);
2973 /* Check for RO volume */
2974 if (scp->flags & CM_SCACHEFLAG_RO) {
2975 code = CM_ERROR_READONLY;
2976 lock_ReleaseWrite(&scp->rw);
2980 /* otherwise, we have to make an RPC to get the status */
2981 code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STORESTATUS);
2983 lock_ReleaseWrite(&scp->rw);
2986 lock_ConvertWToR(&scp->rw);
2988 /* make the attr structure */
2989 cm_StatusFromAttr(&afsInStatus, scp, attrp);
2991 tfid.Volume = scp->fid.volume;
2992 tfid.Vnode = scp->fid.vnode;
2993 tfid.Unique = scp->fid.unique;
2994 lock_ReleaseRead(&scp->rw);
2996 /* now make the RPC */
2997 InterlockedIncrement(&scp->activeRPCs);
2999 osi_Log1(afsd_logp, "CALL StoreStatus scp 0x%p", scp);
3001 code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
3005 rxconnp = cm_GetRxConn(connp);
3006 code = RXAFS_StoreStatus(rxconnp, &tfid,
3007 &afsInStatus, &afsOutStatus, &volSync);
3008 rx_PutConnection(rxconnp);
3010 } while (cm_Analyze(connp, userp, reqp,
3011 &scp->fid, NULL, 1, &afsOutStatus, &volSync, NULL, NULL, code));
3012 code = cm_MapRPCError(code, reqp);
3015 osi_Log1(afsd_logp, "CALL StoreStatus FAILURE, code 0x%x", code);
3017 osi_Log0(afsd_logp, "CALL StoreStatus SUCCESS");
3019 lock_ObtainWrite(&scp->rw);
3021 code = cm_MergeStatus( NULL, scp, &afsOutStatus, &volSync, userp, reqp,
3022 CM_MERGEFLAG_FORCE|CM_MERGEFLAG_STOREDATA);
3024 InterlockedDecrement(&scp->activeRPCs);
3025 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STORESTATUS);
3027 /* if we're changing the mode bits, discard the ACL cache,
3028 * since we changed the mode bits.
3030 if (afsInStatus.Mask & AFS_SETMODE)
3031 cm_FreeAllACLEnts(scp);
3032 lock_ReleaseWrite(&scp->rw);
3036 long cm_Create(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
3037 cm_scache_t **scpp, cm_user_t *userp, cm_req_t *reqp)
3042 cm_callbackRequest_t cbReq;
3045 cm_scache_t *scp = NULL;
3048 AFSStoreStatus inStatus;
3049 AFSFetchStatus updatedDirStatus;
3050 AFSFetchStatus newFileStatus;
3051 AFSCallBack newFileCallback;
3053 struct rx_connection * rxconnp;
3055 fschar_t * fnamep = NULL;
3057 memset(&volSync, 0, sizeof(volSync));
3059 /* can't create names with @sys in them; must expand it manually first.
3060 * return "invalid request" if they try.
3062 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
3063 return CM_ERROR_ATSYS;
3066 #ifdef AFS_FREELANCE_CLIENT
3067 /* Freelance root volume does not hold files */
3068 if (cm_freelanceEnabled &&
3069 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
3070 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
3072 return CM_ERROR_NOACCESS;
3074 #endif /* AFS_FREELANCE_CLIENT */
3076 /* Check for RO volume */
3077 if (dscp->flags & CM_SCACHEFLAG_RO)
3078 return CM_ERROR_READONLY;
3080 /* before starting the RPC, mark that we're changing the file data, so
3081 * that someone who does a chmod will know to wait until our call
3084 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3086 lock_ObtainWrite(&dscp->rw);
3087 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3088 lock_ReleaseWrite(&dscp->rw);
3090 cm_StartCallbackGrantingCall(NULL, &cbReq);
3092 cm_EndDirOp(&dirop);
3099 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3101 cm_StatusFromAttr(&inStatus, NULL, attrp);
3103 /* try the RPC now */
3104 InterlockedIncrement(&dscp->activeRPCs);
3105 osi_Log1(afsd_logp, "CALL CreateFile scp 0x%p", dscp);
3107 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3111 dirAFSFid.Volume = dscp->fid.volume;
3112 dirAFSFid.Vnode = dscp->fid.vnode;
3113 dirAFSFid.Unique = dscp->fid.unique;
3115 rxconnp = cm_GetRxConn(connp);
3116 code = RXAFS_CreateFile(connp->rxconnp, &dirAFSFid, fnamep,
3117 &inStatus, &newAFSFid, &newFileStatus,
3118 &updatedDirStatus, &newFileCallback,
3120 rx_PutConnection(rxconnp);
3122 } while (cm_Analyze(connp, userp, reqp,
3123 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, &cbReq, code));
3124 code = cm_MapRPCError(code, reqp);
3127 osi_Log1(afsd_logp, "CALL CreateFile FAILURE, code 0x%x", code);
3129 osi_Log0(afsd_logp, "CALL CreateFile SUCCESS");
3132 lock_ObtainWrite(&dirop.scp->dirlock);
3133 dirop.lockType = CM_DIRLOCK_WRITE;
3135 lock_ObtainWrite(&dscp->rw);
3137 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3138 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3139 if (cm_CheckDirOpForSingleChange(&dirop)) {
3140 lock_ReleaseWrite(&dscp->rw);
3141 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3143 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3145 lock_ObtainWrite(&dscp->rw);
3148 InterlockedDecrement(&dscp->activeRPCs);
3150 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3151 lock_ReleaseWrite(&dscp->rw);
3153 /* now try to create the file's entry, too, but be careful to
3154 * make sure that we don't merge in old info. Since we weren't locking
3155 * out any requests during the file's creation, we may have pretty old
3159 code = cm_GetSCache(&newFid, &dscp->fid, &scp, userp, reqp);
3161 lock_ObtainWrite(&scp->rw);
3162 scp->creator = userp; /* remember who created it */
3163 if (!cm_HaveCallback(scp)) {
3164 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
3165 &newFileCallback, &volSync, 0);
3167 InterlockedIncrement(&scp->activeRPCs);
3168 code = cm_MergeStatus( dscp, scp, &newFileStatus, &volSync,
3173 lock_ReleaseWrite(&scp->rw);
3177 /* make sure we end things properly */
3179 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
3181 cm_EndDirOp(&dirop);
3190 cm_ReleaseSCache(scp);
3196 * locked if TRUE means write-locked
3197 * else the cm_scache_t rw must not be held
3199 long cm_FSync(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp, afs_uint32 locked)
3204 lock_ReleaseWrite(&scp->rw);
3206 osi_Log2(afsd_logp, "cm_FSync scp 0x%p userp 0x%p", scp, userp);
3208 code = buf_CleanVnode(scp, userp, reqp);
3210 lock_ObtainWrite(&scp->rw);
3212 if (scp->mask & (CM_SCACHEMASK_TRUNCPOS
3213 | CM_SCACHEMASK_CLIENTMODTIME
3214 | CM_SCACHEMASK_LENGTH))
3215 code = cm_StoreMini(scp, userp, reqp);
3217 if (scp->flags & (CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE)) {
3218 code = (scp->flags & CM_SCACHEFLAG_OVERQUOTA) ? CM_ERROR_QUOTA : CM_ERROR_SPACE;
3219 scp->flags &= ~(CM_SCACHEFLAG_OVERQUOTA | CM_SCACHEFLAG_OUTOFSPACE);
3223 lock_ReleaseWrite(&scp->rw);
3224 } else if (locked) {
3225 lock_ObtainWrite(&scp->rw);
3230 long cm_MakeDir(cm_scache_t *dscp, clientchar_t *cnamep, long flags, cm_attr_t *attrp,
3231 cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3236 cm_callbackRequest_t cbReq;
3239 cm_scache_t *scp = NULL;
3242 AFSStoreStatus inStatus;
3243 AFSFetchStatus updatedDirStatus;
3244 AFSFetchStatus newDirStatus;
3245 AFSCallBack newDirCallback;
3247 struct rx_connection * rxconnp;
3249 fschar_t * fnamep = NULL;
3251 memset(&volSync, 0, sizeof(volSync));
3253 /* can't create names with @sys in them; must expand it manually first.
3254 * return "invalid request" if they try.
3256 if (cm_ExpandSysName(NULL, cnamep, NULL, 0, 0)) {
3257 return CM_ERROR_ATSYS;
3260 #ifdef AFS_FREELANCE_CLIENT
3261 /* Freelance root volume does not hold subdirectories */
3262 if (cm_freelanceEnabled &&
3263 dscp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
3264 dscp->fid.volume==AFS_FAKE_ROOT_VOL_ID )
3266 return CM_ERROR_NOACCESS;
3268 #endif /* AFS_FREELANCE_CLIENT */
3270 /* Check for RO volume */
3271 if (dscp->flags & CM_SCACHEFLAG_RO)
3272 return CM_ERROR_READONLY;
3274 /* before starting the RPC, mark that we're changing the directory
3275 * data, so that someone who does a chmod on the dir will wait until
3276 * our call completes.
3278 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3280 lock_ObtainWrite(&dscp->rw);
3281 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3282 lock_ReleaseWrite(&dscp->rw);
3284 cm_StartCallbackGrantingCall(NULL, &cbReq);
3286 cm_EndDirOp(&dirop);
3293 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3294 cm_StatusFromAttr(&inStatus, NULL, attrp);
3296 /* try the RPC now */
3297 InterlockedIncrement(&dscp->activeRPCs);
3298 osi_Log1(afsd_logp, "CALL MakeDir scp 0x%p", dscp);
3300 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3304 dirAFSFid.Volume = dscp->fid.volume;
3305 dirAFSFid.Vnode = dscp->fid.vnode;
3306 dirAFSFid.Unique = dscp->fid.unique;
3308 rxconnp = cm_GetRxConn(connp);
3309 code = RXAFS_MakeDir(connp->rxconnp, &dirAFSFid, fnamep,
3310 &inStatus, &newAFSFid, &newDirStatus,
3311 &updatedDirStatus, &newDirCallback,
3313 rx_PutConnection(rxconnp);
3315 } while (cm_Analyze(connp, userp, reqp,
3316 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, &cbReq, code));
3317 code = cm_MapRPCError(code, reqp);
3320 osi_Log1(afsd_logp, "CALL MakeDir FAILURE, code 0x%x", code);
3322 osi_Log0(afsd_logp, "CALL MakeDir SUCCESS");
3325 lock_ObtainWrite(&dirop.scp->dirlock);
3326 dirop.lockType = CM_DIRLOCK_WRITE;
3328 lock_ObtainWrite(&dscp->rw);
3330 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3331 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3332 if (cm_CheckDirOpForSingleChange(&dirop)) {
3333 lock_ReleaseWrite(&dscp->rw);
3334 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3336 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3338 lock_ObtainWrite(&dscp->rw);
3341 InterlockedDecrement(&dscp->activeRPCs);
3343 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3344 lock_ReleaseWrite(&dscp->rw);
3346 /* now try to create the new dir's entry, too, but be careful to
3347 * make sure that we don't merge in old info. Since we weren't locking
3348 * out any requests during the file's creation, we may have pretty old
3352 code = cm_GetSCache(&newFid, &dscp->fid, &scp, userp, reqp);
3354 lock_ObtainWrite(&scp->rw);
3355 if (!cm_HaveCallback(scp)) {
3356 lostRace = cm_EndCallbackGrantingCall(scp, &cbReq,
3357 &newDirCallback, &volSync, 0);
3359 InterlockedIncrement(&scp->activeRPCs);
3360 code = cm_MergeStatus( dscp, scp, &newDirStatus, &volSync,
3365 lock_ReleaseWrite(&scp->rw);
3369 /* make sure we end things properly */
3371 cm_EndCallbackGrantingCall(NULL, &cbReq, NULL, NULL, 0);
3373 cm_EndDirOp(&dirop);
3381 cm_ReleaseSCache(scp);
3384 /* and return error code */
3388 long cm_Link(cm_scache_t *dscp, clientchar_t *cnamep, cm_scache_t *sscp, long flags,
3389 cm_user_t *userp, cm_req_t *reqp)
3394 AFSFid existingAFSFid;
3395 AFSFetchStatus updatedDirStatus;
3396 AFSFetchStatus newLinkStatus;
3398 struct rx_connection * rxconnp;
3400 fschar_t * fnamep = NULL;
3403 memset(&volSync, 0, sizeof(volSync));
3405 if (dscp->fid.cell != sscp->fid.cell ||
3406 dscp->fid.volume != sscp->fid.volume) {
3407 return CM_ERROR_CROSSDEVLINK;
3410 /* Check for RO volume */
3411 if (dscp->flags & CM_SCACHEFLAG_RO)
3412 return CM_ERROR_READONLY;
3414 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3416 lock_ObtainWrite(&dscp->rw);
3417 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3418 lock_ReleaseWrite(&dscp->rw);
3420 cm_EndDirOp(&dirop);
3425 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3427 /* try the RPC now */
3428 InterlockedIncrement(&dscp->activeRPCs);
3429 osi_Log1(afsd_logp, "CALL Link scp 0x%p", dscp);
3431 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3434 dirAFSFid.Volume = dscp->fid.volume;
3435 dirAFSFid.Vnode = dscp->fid.vnode;
3436 dirAFSFid.Unique = dscp->fid.unique;
3438 existingAFSFid.Volume = sscp->fid.volume;
3439 existingAFSFid.Vnode = sscp->fid.vnode;
3440 existingAFSFid.Unique = sscp->fid.unique;
3442 rxconnp = cm_GetRxConn(connp);
3443 code = RXAFS_Link(rxconnp, &dirAFSFid, fnamep, &existingAFSFid,
3444 &newLinkStatus, &updatedDirStatus, &volSync);
3445 rx_PutConnection(rxconnp);
3446 osi_Log1(afsd_logp," RXAFS_Link returns 0x%x", code);
3448 } while (cm_Analyze(connp, userp, reqp, &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, NULL, code));
3450 code = cm_MapRPCError(code, reqp);
3453 osi_Log1(afsd_logp, "CALL Link FAILURE, code 0x%x", code);
3455 osi_Log0(afsd_logp, "CALL Link SUCCESS");
3458 lock_ObtainWrite(&dirop.scp->dirlock);
3459 dirop.lockType = CM_DIRLOCK_WRITE;
3461 lock_ObtainWrite(&dscp->rw);
3463 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3466 if (cm_CheckDirOpForSingleChange(&dirop)) {
3467 lock_ReleaseWrite(&dscp->rw);
3468 cm_DirCreateEntry(&dirop, fnamep, &sscp->fid);
3470 cm_BPlusDirCreateEntry(&dirop, cnamep, &sscp->fid);
3472 lock_ObtainWrite(&dscp->rw);
3475 InterlockedDecrement(&dscp->activeRPCs);
3477 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3478 lock_ReleaseWrite(&dscp->rw);
3480 cm_EndDirOp(&dirop);
3482 if (invalidate && RDR_Initialized)
3483 RDR_InvalidateObject(dscp->fid.cell, dscp->fid.volume, dscp->fid.vnode,
3484 dscp->fid.unique, dscp->fid.hash,
3485 dscp->fileType, AFS_INVALIDATE_DATA_VERSION);
3487 /* Update the linked object status */
3489 lock_ObtainWrite(&sscp->rw);
3490 InterlockedIncrement(&sscp->activeRPCs);
3491 code = cm_MergeStatus(NULL, sscp, &newLinkStatus, &volSync, userp, reqp, 0);
3492 lock_ReleaseWrite(&sscp->rw);
3500 long cm_SymLink(cm_scache_t *dscp, clientchar_t *cnamep, fschar_t *contentsp, long flags,
3501 cm_attr_t *attrp, cm_user_t *userp, cm_req_t *reqp, cm_scache_t **scpp)
3509 AFSStoreStatus inStatus;
3510 AFSFetchStatus updatedDirStatus;
3511 AFSFetchStatus newLinkStatus;
3513 struct rx_connection * rxconnp;
3515 fschar_t *fnamep = NULL;
3520 /* Check for RO volume */
3521 if (dscp->flags & CM_SCACHEFLAG_RO)
3522 return CM_ERROR_READONLY;
3524 memset(&volSync, 0, sizeof(volSync));
3526 /* before starting the RPC, mark that we're changing the directory data,
3527 * so that someone who does a chmod on the dir will wait until our
3530 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3532 lock_ObtainWrite(&dscp->rw);
3533 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3534 lock_ReleaseWrite(&dscp->rw);
3536 cm_EndDirOp(&dirop);
3541 fnamep = cm_ClientStringToFsStringAlloc(cnamep, -1, NULL);
3543 cm_StatusFromAttr(&inStatus, NULL, attrp);
3545 /* try the RPC now */
3546 InterlockedIncrement(&dscp->activeRPCs);
3547 osi_Log1(afsd_logp, "CALL Symlink scp 0x%p", dscp);
3549 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3553 dirAFSFid.Volume = dscp->fid.volume;
3554 dirAFSFid.Vnode = dscp->fid.vnode;
3555 dirAFSFid.Unique = dscp->fid.unique;
3557 rxconnp = cm_GetRxConn(connp);
3558 code = RXAFS_Symlink(rxconnp, &dirAFSFid, fnamep, contentsp,
3559 &inStatus, &newAFSFid, &newLinkStatus,
3560 &updatedDirStatus, &volSync);
3561 rx_PutConnection(rxconnp);
3563 } while (cm_Analyze(connp, userp, reqp,
3564 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, NULL, code));
3565 code = cm_MapRPCError(code, reqp);
3568 osi_Log1(afsd_logp, "CALL Symlink FAILURE, code 0x%x", code);
3570 osi_Log0(afsd_logp, "CALL Symlink SUCCESS");
3573 lock_ObtainWrite(&dirop.scp->dirlock);
3574 dirop.lockType = CM_DIRLOCK_WRITE;
3576 lock_ObtainWrite(&dscp->rw);
3578 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3579 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3580 if (cm_CheckDirOpForSingleChange(&dirop)) {
3581 lock_ReleaseWrite(&dscp->rw);
3582 cm_SetFid(&newFid, dscp->fid.cell, dscp->fid.volume, newAFSFid.Vnode, newAFSFid.Unique);
3584 cm_DirCreateEntry(&dirop, fnamep, &newFid);
3586 cm_BPlusDirCreateEntry(&dirop, cnamep, &newFid);
3588 lock_ObtainWrite(&dscp->rw);
3591 InterlockedDecrement(&dscp->activeRPCs);
3593 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3594 lock_ReleaseWrite(&dscp->rw);
3596 cm_EndDirOp(&dirop);
3598 /* now try to create the new dir's entry, too, but be careful to
3599 * make sure that we don't merge in old info. Since we weren't locking
3600 * out any requests during the file's creation, we may have pretty old
3604 code = cm_GetSCache(&newFid, &dscp->fid, &scp, userp, reqp);
3606 lock_ObtainWrite(&scp->rw);
3607 if (!cm_HaveCallback(scp)) {
3608 InterlockedIncrement(&scp->activeRPCs);
3609 code = cm_MergeStatus( dscp, scp, &newLinkStatus, &volSync,
3612 lock_ReleaseWrite(&scp->rw);
3617 cm_ReleaseSCache(scp);
3624 /* and return error code */
3628 /*! \brief Remove a directory
3630 Encapsulates a call to RXAFS_RemoveDir().
3632 \param[in] dscp cm_scache_t for the directory containing the
3633 directory to be removed.
3635 \param[in] fnamep This will be the original name of the directory
3636 as known to the file server. It will be passed in to RXAFS_RemoveDir().
3637 This parameter is optional. If it is not provided the value
3640 \param[in] cnamep Normalized name used to update the local
3643 \param[in] userp cm_user_t for the request.
3645 \param[in] reqp Request tracker.
3647 long cm_RemoveDir(cm_scache_t *dscp, fschar_t *fnamep, clientchar_t *cnamep, cm_user_t *userp, cm_req_t *reqp)
3653 AFSFetchStatus updatedDirStatus;
3655 struct rx_connection * rxconnp;
3657 cm_scache_t *scp = NULL;
3658 int free_fnamep = FALSE;
3660 memset(&volSync, 0, sizeof(volSync));
3662 if (fnamep == NULL) {
3665 code = cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_READ,
3666 CM_DIROP_FLAG_NONE, &dirop);
3668 code = cm_BPlusDirLookupOriginalName(&dirop, cnamep, &fnamep);
3671 cm_EndDirOp(&dirop);
3678 code = cm_Lookup(dscp, cnamep, CM_FLAG_NOMOUNTCHASE, userp, reqp, &scp);
3682 /* Check for RO volume */
3683 if (dscp->flags & CM_SCACHEFLAG_RO) {
3684 code = CM_ERROR_READONLY;
3688 /* before starting the RPC, mark that we're changing the directory data,
3689 * so that someone who does a chmod on the dir will wait until our
3692 cm_BeginDirOp(dscp, userp, reqp, CM_DIRLOCK_NONE, CM_DIROP_FLAG_NONE,
3694 lock_ObtainWrite(&dscp->rw);
3695 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
3696 lock_ReleaseWrite(&dscp->rw);
3698 cm_EndDirOp(&dirop);
3703 /* try the RPC now */
3704 InterlockedIncrement(&dscp->activeRPCs);
3705 osi_Log1(afsd_logp, "CALL RemoveDir scp 0x%p", dscp);
3707 code = cm_ConnFromFID(&dscp->fid, userp, reqp, &connp);
3711 dirAFSFid.Volume = dscp->fid.volume;
3712 dirAFSFid.Vnode = dscp->fid.vnode;
3713 dirAFSFid.Unique = dscp->fid.unique;
3715 rxconnp = cm_GetRxConn(connp);
3716 code = RXAFS_RemoveDir(rxconnp, &dirAFSFid, fnamep,
3717 &updatedDirStatus, &volSync);
3718 rx_PutConnection(rxconnp);
3720 } while (cm_Analyze(connp, userp, reqp,
3721 &dscp->fid, NULL, 1, &updatedDirStatus, &volSync, NULL, NULL, code));
3722 code = cm_MapRPCErrorRmdir(code, reqp);
3725 osi_Log1(afsd_logp, "CALL RemoveDir FAILURE, code 0x%x", code);
3727 osi_Log0(afsd_logp, "CALL RemoveDir SUCCESS");
3730 lock_ObtainWrite(&dirop.scp->dirlock);
3731 dirop.lockType = CM_DIRLOCK_WRITE;
3733 lock_ObtainWrite(&dscp->rw);
3735 cm_dnlcRemove(dscp, cnamep);
3736 code = cm_MergeStatus(NULL, dscp, &updatedDirStatus, &volSync, userp, reqp, CM_MERGEFLAG_DIROP);
3737 if (cm_CheckDirOpForSingleChange(&dirop) && cnamep != NULL) {
3738 lock_ReleaseWrite(&dscp->rw);
3739 cm_DirDeleteEntry(&dirop, fnamep);
3741 cm_BPlusDirDeleteEntry(&dirop, cnamep);
3743 lock_ObtainWrite(&dscp->rw);
3746 InterlockedDecrement(&dscp->activeRPCs);
3748 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
3749 lock_ReleaseWrite(&dscp->rw);
3751 cm_EndDirOp(&dirop);
3755 lock_ObtainWrite(&scp->rw);
3756 _InterlockedOr(&scp->flags, CM_SCACHEFLAG_DELETED);
3757 lock_ObtainWrite(&cm_scacheLock);
3758 cm_AdjustScacheLRU(scp);
3759 lock_ReleaseWrite(&cm_scacheLock);
3760 lock_ReleaseWrite(&scp->rw);
3761 if (RDR_Initialized && !(reqp->flags & CM_REQ_SOURCE_REDIR))
3762 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode,
3763 scp->fid.unique, scp->fid.hash,
3764 scp->fileType, AFS_INVALIDATE_DELETED);
3766 cm_ReleaseSCache(scp);
3773 /* and return error code */
3777 long cm_Open(cm_scache_t *scp, int type, cm_user_t *userp)
3779 /* grab mutex on contents */
3780 lock_ObtainWrite(&scp->rw);
3782 /* reset the prefetch info */
3783 scp->prefetch.base.LowPart = 0; /* base */
3784 scp->prefetch.base.HighPart = 0;
3785 scp->prefetch.end.LowPart = 0; /* and end */
3786 scp->prefetch.end.HighPart = 0;
3788 /* release mutex on contents */
3789 lock_ReleaseWrite(&scp->rw);
3795 /*! \brief Rename a file or directory
3797 Encapsulates a RXAFS_Rename() call.
3799 \param[in] oldDscp cm_scache_t for the directory containing the old
3802 \param[in] oldNamep The original old name known to the file server.
3803 This is the name that will be passed into the RXAFS_Rename().
3804 If it is not provided, it will be looked up.
3806 \param[in] normalizedOldNamep Normalized old name. This is used for
3807 updating local directory caches.
3809 \param[in] newDscp cm_scache_t for the directory containing the new
3812 \param[in] newNamep New name. Normalized.
3814 \param[in] userp cm_user_t for the request.
3816 \param[in,out] reqp Request tracker.
3819 long cm_Rename(cm_scache_t *oldDscp, fschar_t *oldNamep, clientchar_t *cOldNamep,
3820 cm_scache_t *newDscp, clientchar_t *cNewNamep, cm_user_t *userp,
3825 AFSFid oldDirAFSFid;
3826 AFSFid newDirAFSFid;
3827 AFSFetchStatus updatedOldDirStatus;
3828 AFSFetchStatus updatedNewDirStatus;
3831 int bTargetExists = 0;
3832 struct rx_connection * rxconnp;
3833 cm_dirOp_t oldDirOp;
3836 cm_dirOp_t newDirOp;
3837 fschar_t * newNamep = NULL;
3838 int free_oldNamep = FALSE;
3839 cm_scache_t *oldScp = NULL, *oldTargetScp = NULL;
3840 int rpc_skipped = 0;
3842 memset(&volSync, 0, sizeof(volSync));
3844 if (cOldNamep == NULL || cNewNamep == NULL ||
3845 cm_ClientStrLen(cOldNamep) == 0 ||
3846 cm_ClientStrLen(cNewNamep) == 0)
3847 return CM_ERROR_INVAL;
3849 /* check for identical names */
3850 if (oldDscp == newDscp &&
3851 cm_ClientStrCmp(cOldNamep, cNewNamep) == 0) {
3852 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_RENAME_IDENTICAL",
3854 return CM_ERROR_RENAME_IDENTICAL;
3857 /* Check for RO volume */
3858 if ((oldDscp->flags & CM_SCACHEFLAG_RO) || (newDscp->flags & CM_SCACHEFLAG_RO)) {
3859 return CM_ERROR_READONLY;
3862 if (oldNamep == NULL) {
3865 code = cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_READ,
3866 CM_DIROP_FLAG_NONE, &oldDirOp);
3868 code = cm_BPlusDirLookupOriginalName(&oldDirOp, cOldNamep, &oldNamep);
3870 free_oldNamep = TRUE;
3871 cm_EndDirOp(&oldDirOp);
3875 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S Original Name lookup failed",
3876 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
3881 /* before starting the RPC, mark that we're changing the directory data,
3882 * so that someone who does a chmod on the dir will wait until our call
3883 * completes. We do this in vnode order so that we don't deadlock,
3884 * which makes the code a little verbose.
3886 if (oldDscp == newDscp) {
3888 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3889 CM_DIROP_FLAG_NONE, &oldDirOp);
3890 lock_ObtainWrite(&oldDscp->rw);
3891 cm_dnlcRemove(oldDscp, cOldNamep);
3892 cm_dnlcRemove(oldDscp, cNewNamep);
3893 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3894 CM_SCACHESYNC_STOREDATA);
3895 lock_ReleaseWrite(&oldDscp->rw);
3897 cm_EndDirOp(&oldDirOp);
3901 /* two distinct dir vnodes */
3903 if (oldDscp->fid.cell != newDscp->fid.cell ||
3904 oldDscp->fid.volume != newDscp->fid.volume) {
3905 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p CM_ERROR_CROSSDEVLINK",
3907 code = CM_ERROR_CROSSDEVLINK;
3911 /* shouldn't happen that we have distinct vnodes for two
3912 * different files, but could due to deliberate attack, or
3913 * stale info. Avoid deadlocks and quit now.
3915 if (oldDscp->fid.vnode == newDscp->fid.vnode) {
3916 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p newDscp 0x%p vnode collision",
3918 code = CM_ERROR_CROSSDEVLINK;
3922 if (oldDscp->fid.vnode < newDscp->fid.vnode) {
3923 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3924 CM_DIROP_FLAG_NONE, &oldDirOp);
3925 lock_ObtainWrite(&oldDscp->rw);
3926 cm_dnlcRemove(oldDscp, cOldNamep);
3927 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3928 CM_SCACHESYNC_STOREDATA);
3929 lock_ReleaseWrite(&oldDscp->rw);
3931 cm_EndDirOp(&oldDirOp);
3933 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3934 CM_DIROP_FLAG_NONE, &newDirOp);
3935 lock_ObtainWrite(&newDscp->rw);
3936 cm_dnlcRemove(newDscp, cNewNamep);
3937 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3938 CM_SCACHESYNC_STOREDATA);
3939 lock_ReleaseWrite(&newDscp->rw);
3941 cm_EndDirOp(&newDirOp);
3943 /* cleanup first one */
3944 lock_ObtainWrite(&oldDscp->rw);
3945 cm_SyncOpDone(oldDscp, NULL,
3946 CM_SCACHESYNC_STOREDATA);
3947 lock_ReleaseWrite(&oldDscp->rw);
3948 cm_EndDirOp(&oldDirOp);
3953 /* lock the new vnode entry first */
3954 cm_BeginDirOp(newDscp, userp, reqp, CM_DIRLOCK_NONE,
3955 CM_DIROP_FLAG_NONE, &newDirOp);
3956 lock_ObtainWrite(&newDscp->rw);
3957 cm_dnlcRemove(newDscp, cNewNamep);
3958 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
3959 CM_SCACHESYNC_STOREDATA);
3960 lock_ReleaseWrite(&newDscp->rw);
3962 cm_EndDirOp(&newDirOp);
3964 cm_BeginDirOp(oldDscp, userp, reqp, CM_DIRLOCK_NONE,
3965 CM_DIROP_FLAG_NONE, &oldDirOp);
3966 lock_ObtainWrite(&oldDscp->rw);
3967 cm_dnlcRemove(oldDscp, cOldNamep);
3968 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
3969 CM_SCACHESYNC_STOREDATA);
3970 lock_ReleaseWrite(&oldDscp->rw);
3972 cm_EndDirOp(&oldDirOp);
3974 /* cleanup first one */
3975 lock_ObtainWrite(&newDscp->rw);
3976 cm_SyncOpDone(newDscp, NULL,
3977 CM_SCACHESYNC_STOREDATA);
3978 lock_ReleaseWrite(&newDscp->rw);
3979 cm_EndDirOp(&newDirOp);
3983 } /* two distinct vnodes */
3989 * The source and destination directories are now locked and no other local
3990 * changes can occur.
3992 * Before we permit the operation, make sure that we do not already have
3993 * an object in the destination directory that has a case-insensitive match
3994 * for this name UNLESS the matching object is the object we are renaming.
3996 code = cm_Lookup(oldDscp, cOldNamep, 0, userp, reqp, &oldScp);
3998 osi_Log2(afsd_logp, "cm_Rename oldDscp 0x%p cOldName %S old name lookup failed",
3999 oldDscp, osi_LogSaveStringW(afsd_logp, cOldNamep));
4004 /* Case sensitive lookup. If this succeeds we are done. */
4005 code = cm_Lookup(newDscp, cNewNamep, 0, userp, reqp, &oldTargetScp);
4008 * Case insensitive lookup. If this succeeds, it could have found the
4009 * same file with a name that differs only by case or it could be a
4010 * different file entirely.
4012 code = cm_Lookup(newDscp, cNewNamep, CM_FLAG_CASEFOLD, userp, reqp, &oldTargetScp);
4014 /* found a matching object with the new name */
4015 if (cm_FidCmp(&oldScp->fid, &oldTargetScp->fid)) {
4016 /* and they don't match so return an error */
4017 osi_Log2(afsd_logp, "cm_Rename newDscp 0x%p cNewName %S new name already exists",
4018 newDscp, osi_LogSaveStringW(afsd_logp, cNewNamep));
4019 code = CM_ERROR_EXISTS;
4021 cm_ReleaseSCache(oldTargetScp);
4022 oldTargetScp = NULL;
4023 } else if (code == CM_ERROR_AMBIGUOUS_FILENAME) {
4024 code = CM_ERROR_EXISTS;
4026 /* The target does not exist. Clear the error and perform the rename. */
4038 newNamep = cm_ClientStringToFsStringAlloc(cNewNamep, -1, NULL);
4040 /* try the RPC now */
4041 InterlockedIncrement(&oldDscp->activeRPCs);
4043 InterlockedIncrement(&newDscp->activeRPCs);
4044 osi_Log2(afsd_logp, "CALL Rename old scp 0x%p new scp 0x%p",
4047 code = cm_ConnFromFID(&oldDscp->fid, userp, reqp, &connp);
4051 oldDirAFSFid.Volume = oldDscp->fid.volume;
4052 oldDirAFSFid.Vnode = oldDscp->fid.vnode;
4053 oldDirAFSFid.Unique = oldDscp->fid.unique;
4054 newDirAFSFid.Volume = newDscp->fid.volume;
4055 newDirAFSFid.Vnode = newDscp->fid.vnode;
4056 newDirAFSFid.Unique = newDscp->fid.unique;
4058 rxconnp = cm_GetRxConn(connp);
4059 code = RXAFS_Rename(rxconnp, &oldDirAFSFid, oldNamep,
4060 &newDirAFSFid, newNamep,
4061 &updatedOldDirStatus, &updatedNewDirStatus,
4063 rx_PutConnection(rxconnp);
4065 } while (cm_Analyze(connp, userp, reqp, &oldDscp->fid, NULL, 1,
4066 &updatedOldDirStatus, &volSync, NULL, NULL, code));
4067 code = cm_MapRPCError(code, reqp);
4070 osi_Log1(afsd_logp, "CALL Rename FAILURE, code 0x%x", code);
4072 osi_Log0(afsd_logp, "CALL Rename SUCCESS");
4075 /* update the individual stat cache entries for the directories */
4077 lock_ObtainWrite(&oldDirOp.scp->dirlock);
4078 oldDirOp.lockType = CM_DIRLOCK_WRITE;
4081 lock_ObtainWrite(&oldDscp->rw);
4083 code = cm_MergeStatus( NULL, oldDscp, &updatedOldDirStatus, &volSync,
4084 userp, reqp, CM_MERGEFLAG_DIROP);
4085 if (cm_CheckDirOpForSingleChange(&oldDirOp)) {
4086 lock_ReleaseWrite(&oldDscp->rw);
4087 if (bTargetExists && oneDir) {
4088 diropCode = cm_DirDeleteEntry(&oldDirOp, newNamep);
4090 cm_BPlusDirDeleteEntry(&oldDirOp, cNewNamep);
4095 diropCode = cm_BPlusDirLookup(&oldDirOp, cOldNamep, &fileFid);
4096 if (diropCode == CM_ERROR_INEXACT_MATCH)
4098 else if (diropCode == EINVAL)
4100 diropCode = cm_DirLookup(&oldDirOp, oldNamep, &fileFid);
4102 if (diropCode == 0) {
4104 diropCode = cm_DirCreateEntry(&oldDirOp, newNamep, &fileFid);
4106 cm_BPlusDirCreateEntry(&oldDirOp, cNewNamep, &fileFid);
4110 if (diropCode == 0) {
4111 diropCode = cm_DirDeleteEntry(&oldDirOp, oldNamep);
4113 cm_BPlusDirDeleteEntry(&oldDirOp, cOldNamep);
4117 lock_ObtainWrite(&oldDscp->rw);
4121 InterlockedDecrement(&oldDscp->activeRPCs);
4123 cm_SyncOpDone(oldDscp, NULL, CM_SCACHESYNC_STOREDATA);
4124 lock_ReleaseWrite(&oldDscp->rw);
4126 cm_EndDirOp(&oldDirOp);
4128 /* and update it for the new one, too, if necessary */
4131 lock_ObtainWrite(&newDirOp.scp->dirlock);
4132 newDirOp.lockType = CM_DIRLOCK_WRITE;
4134 lock_ObtainWrite(&newDscp->rw);
4136 code = cm_MergeStatus( NULL, newDscp, &updatedNewDirStatus, &volSync,
4137 userp, reqp, CM_MERGEFLAG_DIROP);
4140 * we only make the local change if we successfully made
4141 * the change in the old directory AND there was only one
4142 * change in the new directory
4144 if (diropCode == 0 && cm_CheckDirOpForSingleChange(&newDirOp)) {
4145 lock_ReleaseWrite(&newDscp->rw);
4147 if (bTargetExists && !oneDir) {
4148 diropCode = cm_DirDeleteEntry(&newDirOp, newNamep);
4150 cm_BPlusDirDeleteEntry(&newDirOp, cNewNamep);
4154 cm_DirCreateEntry(&newDirOp, newNamep, &fileFid);
4156 cm_BPlusDirCreateEntry(&newDirOp, cNewNamep, &fileFid);
4158 lock_ObtainWrite(&newDscp->rw);
4162 InterlockedIncrement(&newDscp->activeRPCs);
4164 cm_SyncOpDone(newDscp, NULL, CM_SCACHESYNC_STOREDATA);
4165 lock_ReleaseWrite(&newDscp->rw);
4167 cm_EndDirOp(&newDirOp);
4172 * After the rename the file server has invalidated the callbacks
4173 * on the file that was moved and destroyed any target file.
4175 lock_ObtainWrite(&oldScp->rw);
4176 cm_DiscardSCache(oldScp);
4177 lock_ReleaseWrite(&oldScp->rw);
4179 if (RDR_Initialized)
4180 RDR_InvalidateObject(oldScp->fid.cell, oldScp->fid.volume, oldScp->fid.vnode, oldScp->fid.unique,
4181 oldScp->fid.hash, oldScp->fileType, AFS_INVALIDATE_CALLBACK);
4184 lock_ObtainWrite(&oldTargetScp->rw);
4185 cm_DiscardSCache(oldTargetScp);
4186 lock_ReleaseWrite(&oldTargetScp->rw);
4188 if (RDR_Initialized)
4189 RDR_InvalidateObject(oldTargetScp->fid.cell, oldTargetScp->fid.volume, oldTargetScp->fid.vnode, oldTargetScp->fid.unique,
4190 oldTargetScp->fid.hash, oldTargetScp->fileType, AFS_INVALIDATE_CALLBACK);
4196 cm_ReleaseSCache(oldScp);
4199 cm_ReleaseSCache(oldTargetScp);
4206 /* and return error code */
4210 /* Byte range locks:
4212 The OpenAFS Windows client has to fake byte range locks given no
4213 server side support for such locks. This is implemented as keyed
4214 byte range locks on the cache manager.
4216 Keyed byte range locks:
4218 Each cm_scache_t structure keeps track of a list of keyed locks.
4219 The key for a lock identifies an owner of a set of locks (referred
4220 to as a client). Each key is represented by a value. The set of
4221 key values used within a specific cm_scache_t structure form a
4222 namespace that has a scope of just that cm_scache_t structure. The
4223 same key value can be used with another cm_scache_t structure and
4224 correspond to a completely different client. However it is
4225 advantageous for the SMB or IFS layer to make sure that there is a
4226 1-1 mapping between client and keys over all cm_scache_t objects.
4228 Assume a client C has key Key(C) (although, since the scope of the
4229 key is a cm_scache_t, the key can be Key(C,S), where S is the
4230 cm_scache_t. But assume a 1-1 relation between keys and clients).
4231 A byte range (O,+L) denotes byte addresses (O) through (O+L-1)
4232 inclusive (a.k.a. [O,O+L-1]). The function Key(x) is implemented
4233 through cm_generateKey() function for both SMB and IFS.
4235 The list of locks for a cm_scache_t object S is maintained in
4236 S->fileLocks. The cache manager will set a lock on the AFS file
4237 server in order to assert the locks in S->fileLocks. If only
4238 shared locks are in place for S, then the cache manager will obtain
4239 a LockRead lock, while if there are any exclusive locks, it will
4240 obtain a LockWrite lock. If the exclusive locks are all released
4241 while the shared locks remain, then the cache manager will
4242 downgrade the lock from LockWrite to LockRead. Similarly, if an
4243 exclusive lock is obtained when only shared locks exist, then the
4244 cache manager will try to upgrade the lock from LockRead to
4247 Each lock L owned by client C maintains a key L->key such that
4248 L->key == Key(C), the effective range defined by L->LOffset and
4249 L->LLength such that the range of bytes affected by the lock is
4250 (L->LOffset, +L->LLength), a type maintained in L->LockType which
4251 is either exclusive or shared.
4255 A lock exists iff it is in S->fileLocks for some cm_scache_t
4256 S. Existing locks are in one of the following states: ACTIVE,
4257 WAITLOCK, WAITUNLOCK, LOST, DELETED.
4259 The following sections describe each lock and the associated
4262 1. ACTIVE: A lock L is ACTIVE iff the cache manager has asserted
4263 the lock with the AFS file server. This type of lock can be
4264 exercised by a client to read or write to the locked region (as
4267 1.1 ACTIVE->LOST: When the AFS file server fails to extend a
4268 server lock that was required to assert the lock. Before
4269 marking the lock as lost, the cache manager checks if the file
4270 has changed on the server. If the file has not changed, then
4271 the cache manager will attempt to obtain a new server lock
4272 that is sufficient to assert the client side locks for the
4273 file. If any of these fail, the lock is marked as LOST.
4274 Otherwise, it is left as ACTIVE.
4276 1.2 ACTIVE->DELETED: Lock is released.
4278 2. WAITLOCK: A lock is in a WAITLOCK state if the cache manager
4279 grants the lock but the lock is yet to be asserted with the AFS
4280 file server. Once the file server grants the lock, the state
4281 will transition to an ACTIVE lock.
4283 2.1 WAITLOCK->ACTIVE: The server granted the lock.
4285 2.2 WAITLOCK->DELETED: Lock is abandoned, or timed out during
4288 2.3 WAITLOCK->LOST: One or more locks from this client were
4289 marked as LOST. No further locks will be granted to this
4290 client until all lost locks are removed.
4292 3. WAITUNLOCK: A lock is in a WAITUNLOCK state if the cache manager
4293 receives a request for a lock that conflicts with an existing
4294 ACTIVE or WAITLOCK lock. The lock will be placed in the queue
4295 and will be granted at such time the conflicting locks are
4296 removed, at which point the state will transition to either
4299 3.1 WAITUNLOCK->ACTIVE: The conflicting lock was removed. The
4300 current serverLock is sufficient to assert this lock, or a
4301 sufficient serverLock is obtained.
4303 3.2 WAITUNLOCK->WAITLOCK: The conflicting lock was removed,
4304 however the required serverLock is yet to be asserted with the
4307 3.3 WAITUNLOCK->DELETED: The lock is abandoned, timed out or
4310 3.5 WAITUNLOCK->LOST: One or more locks from this client were
4311 marked as LOST. No further locks will be granted to this
4312 client until all lost locks are removed.
4314 4. LOST: A lock L is LOST if the server lock that was required to
4315 assert the lock could not be obtained or if it could not be
4316 extended, or if other locks by the same client were LOST.
4317 Essentially, once a lock is LOST, the contract between the cache
4318 manager and that specific client is no longer valid.
4320 The cache manager rechecks the server lock once every minute and
4321 extends it as appropriate. If this is not done for 5 minutes,
4322 the AFS file server will release the lock (the 5 minute timeout
4323 is based on current file server code and is fairly arbitrary).
4324 Once released, the lock cannot be re-obtained without verifying
4325 that the contents of the file hasn't been modified since the
4326 time the lock was released. Re-obtaining the lock without
4327 verifying this may lead to data corruption. If the lock can not
4328 be obtained safely, then all active locks for the cm_scache_t
4331 4.1 LOST->DELETED: The lock is released.
4333 5. DELETED: The lock is no longer relevant. Eventually, it will
4334 get removed from the cm_scache_t. In the meantime, it will be
4335 treated as if it does not exist.
4337 5.1 DELETED->not exist: The lock is removed from the
4340 The following are classifications of locks based on their state.
4342 6* A lock L is ACCEPTED if it is ACTIVE or WAITLOCK. These locks
4343 have been accepted by the cache manager, but may or may not have
4344 been granted back to the client.
4346 7* A lock L is QUEUED if it is ACTIVE, WAITLOCK or WAITUNLOCK.
4348 8* A lock L is WAITING if it is WAITLOCK or WAITUNLOCK.
4352 A client C can READ range (Offset,+Length) of a file represented by
4353 cm_scache_t S iff (1):
4355 1. for all _a_ in (Offset,+Length), all of the following is true:
4357 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4358 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4361 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4362 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4365 (When locks are lost on an cm_scache_t, all locks are lost. By
4366 4.2 (below), if there is an exclusive LOST lock, then there
4367 can't be any overlapping ACTIVE locks.)
4369 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4371 2. for all _a_ in (Offset,+Length), one of the following is true:
4373 2.1 Byte _a_ of S is unowned (as specified in 1.1) AND there
4374 does not exist a LOST lock L such that _a_ in
4375 (L->LOffset,+L->LLength).
4377 2.2 Byte _a_ of S is owned by C under lock L (as specified in
4378 1.2) AND L->LockType is exclusive.
4380 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4382 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4385 3.1 If L->LockType is exclusive then there does NOT exist a
4386 ACCEPTED lock M in S->fileLocks such that _a_ in
4387 (M->LOffset,+M->LLength).
4389 (If we count all QUEUED locks then we hit cases such as
4390 cascading waiting locks where the locks later on in the queue
4391 can be granted without compromising file integrity. On the
4392 other hand if only ACCEPTED locks are considered, then locks
4393 that were received earlier may end up waiting for locks that
4394 were received later to be unlocked. The choice of ACCEPTED
4395 locks was made to mimic the Windows byte range lock
4398 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4399 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4400 M->LockType is shared.
4402 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4404 4.1 M->key != Key(C)
4406 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4407 and (M->LOffset,+M->LLength) do not intersect.
4409 (Note: If a client loses a lock, it loses all locks.
4410 Subsequently, it will not be allowed to obtain any more locks
4411 until all existing LOST locks that belong to the client are
4412 released. Once all locks are released by a single client,
4413 there exists no further contract between the client and AFS
4414 about the contents of the file, hence the client can then
4415 proceed to obtain new locks and establish a new contract.
4417 This doesn't quite work as you think it should, because most
4418 applications aren't built to deal with losing locks they
4419 thought they once had. For now, we don't have a good
4420 solution to lost locks.
4422 Also, for consistency reasons, we have to hold off on
4423 granting locks that overlap exclusive LOST locks.)
4425 A client C can only unlock locks L in S->fileLocks which have
4428 The representation and invariants are as follows:
4430 - Each cm_scache_t structure keeps:
4432 - A queue of byte-range locks (cm_scache_t::fileLocks) which
4433 are of type cm_file_lock_t.
4435 - A record of the highest server-side lock that has been
4436 obtained for this object (cm_scache_t::serverLock), which is
4437 one of (-1), LockRead, LockWrite.
4439 - A count of ACCEPTED exclusive and shared locks that are in the
4440 queue (cm_scache_t::sharedLocks and
4441 cm_scache_t::exclusiveLocks)
4443 - Each cm_file_lock_t structure keeps:
4445 - The type of lock (cm_file_lock_t::LockType)
4447 - The key associated with the lock (cm_file_lock_t::key)
4449 - The offset and length of the lock (cm_file_lock_t::LOffset
4450 and cm_file_lock_t::LLength)
4452 - The state of the lock.
4454 - Time of issuance or last successful extension
4456 Semantic invariants:
4458 I1. The number of ACCEPTED locks in S->fileLocks are
4459 (S->sharedLocks + S->exclusiveLocks)
4461 External invariants:
4463 I3. S->serverLock is the lock that we have asserted with the
4464 AFS file server for this cm_scache_t.
4466 I4. S->serverLock == LockRead iff there is at least one ACTIVE
4467 shared lock, but no ACTIVE exclusive locks.
4469 I5. S->serverLock == LockWrite iff there is at least one ACTIVE
4472 I6. If L is a LOST lock, then for each lock M in S->fileLocks,
4473 M->key == L->key IMPLIES M is LOST or DELETED.
4478 #define IS_LOCK_ACTIVE(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_WAITLOCK|CM_FILELOCK_FLAG_WAITUNLOCK|CM_FILELOCK_FLAG_LOST)) == 0)
4480 #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)
4482 #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)
4484 #define IS_LOCK_LOST(lockp) (((lockp)->flags & (CM_FILELOCK_FLAG_DELETED|CM_FILELOCK_FLAG_LOST)) == CM_FILELOCK_FLAG_LOST)
4486 #define IS_LOCK_DELETED(lockp) (((lockp)->flags & CM_FILELOCK_FLAG_DELETED) == CM_FILELOCK_FLAG_DELETED)
4489 #define IS_LOCK_ACCEPTED(lockp) (IS_LOCK_ACTIVE(lockp) || IS_LOCK_WAITLOCK(lockp))
4492 #define IS_LOCK_CLIENTONLY(lockp) ((((lockp)->scp->flags & CM_SCACHEFLAG_RO) == CM_SCACHEFLAG_RO) || (((lockp)->flags & CM_FILELOCK_FLAG_CLIENTONLY) == CM_FILELOCK_FLAG_CLIENTONLY))
4495 #define INTERSECT_RANGE(r1,r2) (((r2).offset+(r2).length) > (r1).offset && ((r1).offset +(r1).length) > (r2).offset)
4498 #define CONTAINS_RANGE(r1,r2) (((r2).offset+(r2).length) <= ((r1).offset+(r1).length) && (r1).offset <= (r2).offset)
4500 #if defined(VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS) && !defined(LOCK_TESTING)
4501 #define SCP_SUPPORTS_BRLOCKS(scp) ((scp)->cbServerp && ((scp)->cbServerp->capabilities & VICED_CAPABILITY_USE_BYTE_RANGE_LOCKS))
4503 #define SCP_SUPPORTS_BRLOCKS(scp) (1)
4506 #define SERVERLOCKS_ENABLED(scp) (!((scp)->flags & CM_SCACHEFLAG_RO) && cm_enableServerLocks && SCP_SUPPORTS_BRLOCKS(scp))
4508 #if defined(VICED_CAPABILITY_WRITELOCKACL)
4509 #define SCP_SUPPORTS_WRITELOCKACL(scp) ((scp)->cbServerp && ((scp->cbServerp->capabilities & VICED_CAPABILITY_WRITELOCKACL)))
4511 #define SCP_SUPPORTS_WRITELOCKACL(scp) (0)
4513 /* This should really be defined in any build that this code is being
4515 #error VICED_CAPABILITY_WRITELOCKACL not defined.
4518 static void cm_LockRangeSubtract(cm_range_t * pos, const cm_range_t * neg)
4520 afs_int64 int_begin;
4523 int_begin = max(pos->offset, neg->offset);
4524 int_end = min(pos->offset+pos->length, neg->offset+neg->length);
4526 if (int_begin < int_end) {
4527 if (int_begin == pos->offset) {
4528 pos->length = pos->offset + pos->length - int_end;
4529 pos->offset = int_end;
4530 } else if (int_end == pos->offset + pos->length) {
4531 pos->length = int_begin - pos->offset;
4534 /* We only subtract ranges if the resulting range is
4535 contiguous. If we try to support non-contigous ranges, we
4536 aren't actually improving performance. */
4540 /* Called with scp->rw held. Returns 0 if all is clear to read the
4541 specified range by the client identified by key.
4543 long cm_LockCheckRead(cm_scache_t *scp,
4544 LARGE_INTEGER LOffset,
4545 LARGE_INTEGER LLength,
4548 #ifndef ADVISORY_LOCKS
4550 cm_file_lock_t *fileLock;
4554 int substract_ranges = FALSE;
4556 range.offset = LOffset.QuadPart;
4557 range.length = LLength.QuadPart;
4561 1. for all _a_ in (Offset,+Length), all of the following is true:
4563 1.1 For each ACTIVE lock L in S->fileLocks such that _a_ in
4564 (L->LOffset,+L->LLength); L->key == Key(C) OR L->LockType is
4567 1.2 For each LOST lock L in S->fileLocks such that _a_ in
4568 (L->LOffset,+L->LLength); L->LockType is shared AND L->key !=
4573 lock_ObtainRead(&cm_scacheLock);
4575 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4577 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4579 if (INTERSECT_RANGE(range, fileLock->range)) {
4580 if (IS_LOCK_ACTIVE(fileLock)) {
4581 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4583 /* If there is an active lock for this client, it
4584 is safe to substract ranges.*/
4585 cm_LockRangeSubtract(&range, &fileLock->range);
4586 substract_ranges = TRUE;
4588 if (fileLock->lockType != LockRead) {
4589 code = CM_ERROR_LOCK_CONFLICT;
4593 /* even if the entire range is locked for reading,
4594 we still can't grant the lock at this point
4595 because the client may have lost locks. That
4596 is, unless we have already seen an active lock
4597 belonging to the client, in which case there
4598 can't be any lost locks for this client. */
4599 if (substract_ranges)
4600 cm_LockRangeSubtract(&range, &fileLock->range);
4602 } else if (IS_LOCK_LOST(fileLock) &&
4603 (cm_KeyEquals(&fileLock->key, &key, 0) || fileLock->lockType == LockWrite)) {
4604 code = CM_ERROR_BADFD;
4610 lock_ReleaseRead(&cm_scacheLock);
4612 osi_Log4(afsd_logp, "cm_LockCheckRead scp 0x%x offset %d length %d code 0x%x",
4613 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4624 /* Called with scp->rw held. Returns 0 if all is clear to write the
4625 specified range by the client identified by key.
4627 long cm_LockCheckWrite(cm_scache_t *scp,
4628 LARGE_INTEGER LOffset,
4629 LARGE_INTEGER LLength,
4632 #ifndef ADVISORY_LOCKS
4634 cm_file_lock_t *fileLock;
4639 range.offset = LOffset.QuadPart;
4640 range.length = LLength.QuadPart;
4643 A client C can WRITE range (Offset,+Length) of cm_scache_t S iff (2):
4645 2. for all _a_ in (Offset,+Length), one of the following is true:
4647 2.1 Byte _a_ of S is unowned AND there does not exist a LOST
4648 lock L such that _a_ in (L->LOffset,+L->LLength).
4650 2.2 Byte _a_ of S is owned by C under lock L AND L->LockType is
4654 lock_ObtainRead(&cm_scacheLock);
4656 for (q = scp->fileLocksH; q && range.length > 0; q = osi_QNext(q)) {
4658 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4660 if (INTERSECT_RANGE(range, fileLock->range)) {
4661 if (IS_LOCK_ACTIVE(fileLock)) {
4662 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4663 if (fileLock->lockType == LockWrite) {
4665 /* if there is an active lock for this client, it
4666 is safe to substract ranges */
4667 cm_LockRangeSubtract(&range, &fileLock->range);
4669 code = CM_ERROR_LOCK_CONFLICT;
4673 code = CM_ERROR_LOCK_CONFLICT;
4676 } else if (IS_LOCK_LOST(fileLock)) {
4677 code = CM_ERROR_BADFD;
4683 lock_ReleaseRead(&cm_scacheLock);
4685 osi_Log4(afsd_logp, "cm_LockCheckWrite scp 0x%x offset %d length %d code 0x%x",
4686 scp, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart, code);
4697 /* Called with cm_scacheLock write locked */
4698 static cm_file_lock_t * cm_GetFileLock(void) {
4701 l = (cm_file_lock_t *) cm_freeFileLocks;
4703 osi_QRemove(&cm_freeFileLocks, &l->q);
4705 l = malloc(sizeof(cm_file_lock_t));
4706 osi_assertx(l, "null cm_file_lock_t");
4709 memset(l, 0, sizeof(cm_file_lock_t));
4714 /* Called with cm_scacheLock write locked */
4715 static void cm_PutFileLock(cm_file_lock_t *l) {
4716 osi_QAdd(&cm_freeFileLocks, &l->q);
4719 /* called with scp->rw held. May release it during processing, but
4720 leaves it held on exit. */
4721 long cm_IntSetLock(cm_scache_t * scp, cm_user_t * userp, int lockType,
4727 struct rx_connection * rxconnp;
4729 afs_uint32 reqflags = reqp->flags;
4731 osi_Log2(afsd_logp, "CALL SetLock scp 0x%p for lock %d", scp, lockType);
4735 * The file server prior to 1.6.2 does not report an accurate value
4736 * and callbacks are not issued if the lock is dropped due to expiration.
4738 if ((lockType != LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount != 0) ||
4739 (lockType == LOCKING_ANDX_SHARED_LOCK && scp->fsLockCount < 0))
4741 code = CM_ERROR_LOCK_NOT_GRANTED;
4742 osi_Log2(afsd_logp, "CALL SetLock FAILURE, fsLockCount %d code 0x%x", scp->fsLockCount, code);
4747 memset(&volSync, 0, sizeof(volSync));
4749 tfid.Volume = scp->fid.volume;
4750 tfid.Vnode = scp->fid.vnode;
4751 tfid.Unique = scp->fid.unique;
4754 reqp->flags |= CM_REQ_NORETRY;
4755 lock_ReleaseWrite(&scp->rw);
4758 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4762 rxconnp = cm_GetRxConn(connp);
4763 code = RXAFS_SetLock(rxconnp, &tfid, lockType,
4765 rx_PutConnection(rxconnp);
4767 } while (cm_Analyze(connp, userp, reqp, &cfid, NULL, 1, NULL, &volSync,
4770 code = cm_MapRPCError(code, reqp);
4772 osi_Log1(afsd_logp, "CALL SetLock FAILURE, code 0x%x", code);
4774 osi_Log0(afsd_logp, "CALL SetLock SUCCESS");
4777 reqp->flags = reqflags;
4779 lock_ObtainWrite(&scp->rw);
4782 * The file server does not return a status structure so we must
4783 * locally track the file server lock count to the best of our
4786 if (lockType == LockWrite)
4787 scp->fsLockCount = -1;
4794 /* called with scp->rw held. Releases it during processing */
4795 long cm_IntReleaseLock(cm_scache_t * scp, cm_user_t * userp,
4801 struct rx_connection * rxconnp;
4804 if (scp->flags & CM_SCACHEFLAG_DELETED) {
4805 osi_Log1(afsd_logp, "CALL ReleaseLock on Deleted Vnode scp 0x%p", scp);
4809 memset(&volSync, 0, sizeof(volSync));
4811 tfid.Volume = scp->fid.volume;
4812 tfid.Vnode = scp->fid.vnode;
4813 tfid.Unique = scp->fid.unique;
4816 lock_ReleaseWrite(&scp->rw);
4818 osi_Log1(afsd_logp, "CALL ReleaseLock scp 0x%p", scp);
4821 code = cm_ConnFromFID(&cfid, userp, reqp, &connp);
4825 rxconnp = cm_GetRxConn(connp);
4826 code = RXAFS_ReleaseLock(rxconnp, &tfid, &volSync);
4827 rx_PutConnection(rxconnp);
4829 } while (cm_Analyze(connp, userp, reqp, &cfid, NULL, 1, NULL, &volSync,
4831 code = cm_MapRPCError(code, reqp);
4834 "CALL ReleaseLock FAILURE, code 0x%x", code);
4837 "CALL ReleaseLock SUCCESS");
4839 lock_ObtainWrite(&scp->rw);
4842 * The file server does not return a status structure so we must
4843 * locally track the file server lock count to the best of our
4847 if (scp->fsLockCount < 0)
4848 scp->fsLockCount = 0;
4851 return (code != CM_ERROR_BADFD ? code : 0);
4854 /* called with scp->rw held. May release it during processing, but
4855 will exit with lock held.
4859 - 0 if the user has permission to get the specified lock for the scp
4861 - CM_ERROR_NOACCESS if not
4863 Any other error from cm_SyncOp will be sent down untranslated.
4865 If CM_ERROR_NOACCESS is returned and lock_type is LockRead, then
4866 phas_insert (if non-NULL) will receive a boolean value indicating
4867 whether the user has INSERT permission or not.
4869 long cm_LockCheckPerms(cm_scache_t * scp,
4876 long code = 0, code2 = 0;
4878 /* lock permissions are slightly tricky because of the 'i' bit.
4879 If the user has PRSFS_LOCK, she can read-lock the file. If the
4880 user has PRSFS_WRITE, she can write-lock the file. However, if
4881 the user has PRSFS_INSERT, then she can write-lock new files,
4882 but not old ones. Since we don't have information about
4883 whether a file is new or not, we assume that if the user owns
4884 the scp, then she has the permissions that are granted by
4887 osi_Log3(afsd_logp, "cm_LockCheckPerms for scp[0x%p] type[%d] user[0x%p]",
4888 scp, lock_type, userp);
4890 if (lock_type == LockRead)
4891 rights |= PRSFS_LOCK;
4892 else if (lock_type == LockWrite)
4893 rights |= PRSFS_WRITE | PRSFS_LOCK;
4896 osi_assertx(FALSE, "invalid lock type");
4901 *phas_insert = FALSE;
4903 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
4904 CM_SCACHESYNC_GETSTATUS |
4905 CM_SCACHESYNC_NEEDCALLBACK);
4907 if (phas_insert && scp->creator == userp) {
4909 /* If this file was created by the user, then we check for
4910 PRSFS_INSERT. If the file server is recent enough, then
4911 this should be sufficient for her to get a write-lock (but
4912 not necessarily a read-lock). VICED_CAPABILITY_WRITELOCKACL
4913 indicates whether a file server supports getting write
4914 locks when the user only has PRSFS_INSERT.
4916 If the file was not created by the user we skip the check
4917 because the INSERT bit will not apply to this user even
4921 code2 = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_INSERT,
4922 CM_SCACHESYNC_GETSTATUS |
4923 CM_SCACHESYNC_NEEDCALLBACK);
4925 if (code2 == CM_ERROR_NOACCESS) {
4926 osi_Log0(afsd_logp, "cm_LockCheckPerms user has no INSERT bits");
4928 *phas_insert = TRUE;
4929 osi_Log0(afsd_logp, "cm_LockCheckPerms user has INSERT bits");
4933 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
4935 osi_Log1(afsd_logp, "cm_LockCheckPerms returning code %d", code);
4940 /* called with scp->rw held */
4941 long cm_Lock(cm_scache_t *scp, unsigned char sLockType,
4942 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
4944 int allowWait, cm_user_t *userp, cm_req_t *reqp,
4945 cm_file_lock_t **lockpp)
4948 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
4949 cm_file_lock_t *fileLock;
4952 int wait_unlock = FALSE;
4953 int force_client_lock = FALSE;
4955 osi_Log4(afsd_logp, "cm_Lock scp 0x%x type 0x%x offset %d length %d",
4956 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
4957 osi_Log4(afsd_logp, "... allowWait %d key <0x%x, 0x%x, 0x%x>", allowWait,
4958 key.process_id, key.session_id, key.file_id);
4961 A client C can OBTAIN a lock L on cm_scache_t S iff (both 3 and 4):
4963 3. for all _a_ in (L->LOffset,+L->LLength), ALL of the following is
4966 3.1 If L->LockType is exclusive then there does NOT exist a
4967 ACCEPTED lock M in S->fileLocks such that _a_ in
4968 (M->LOffset,+M->LLength).
4970 3.2 If L->LockType is shared then for each ACCEPTED lock M in
4971 S->fileLocks, if _a_ in (M->LOffset,+M->LLength) then
4972 M->LockType is shared.
4974 4. For all LOST locks M in S->fileLocks, ALL of the following are true:
4976 4.1 M->key != Key(C)
4978 4.2 If M->LockType is exclusive, then (L->LOffset,+L->LLength)
4979 and (M->LOffset,+M->LLength) do not intersect.
4982 range.offset = LOffset.QuadPart;
4983 range.length = LLength.QuadPart;
4985 lock_ObtainRead(&cm_scacheLock);
4987 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
4989 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
4991 if (IS_LOCK_LOST(fileLock)) {
4992 if (cm_KeyEquals(&fileLock->key, &key, 0)) {
4993 code = CM_ERROR_BADFD;
4995 } else if (fileLock->lockType == LockWrite && INTERSECT_RANGE(range, fileLock->range)) {
4996 code = CM_ERROR_WOULDBLOCK;
5002 /* we don't need to check for deleted locks here since deleted
5003 locks are dequeued from scp->fileLocks */
5004 if (IS_LOCK_ACCEPTED(fileLock) &&
5005 INTERSECT_RANGE(range, fileLock->range)) {
5007 if ((sLockType & LOCKING_ANDX_SHARED_LOCK) == 0 ||
5008 fileLock->lockType != LockRead) {
5010 code = CM_ERROR_WOULDBLOCK;
5016 lock_ReleaseRead(&cm_scacheLock);
5018 if (code == 0 && SERVERLOCKS_ENABLED(scp)) {
5019 if (Which == scp->serverLock ||
5020 (Which == LockRead && scp->serverLock == LockWrite)) {
5024 /* we already have the lock we need */
5025 osi_Log3(afsd_logp, " we already have the correct lock. exclusives[%d], shared[%d], serverLock[%d]",
5026 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5028 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
5030 /* special case: if we don't have permission to read-lock
5031 the file, then we force a clientside lock. This is to
5032 compensate for applications that obtain a read-lock for
5033 reading files off of directories that don't grant
5034 read-locks to the user. */
5035 if (code == CM_ERROR_NOACCESS && Which == LockRead) {
5037 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
5038 osi_Log0(afsd_logp, " User has no read-lock perms, but has INSERT perms.");
5041 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
5042 force_client_lock = TRUE;
5046 } else if ((scp->exclusiveLocks > 0) ||
5047 (scp->sharedLocks > 0 && scp->serverLock != LockRead)) {
5050 /* We are already waiting for some other lock. We should
5051 wait for the daemon to catch up instead of generating a
5052 flood of SetLock calls. */
5053 osi_Log3(afsd_logp, " already waiting for other lock. exclusives[%d], shared[%d], serverLock[%d]",
5054 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5056 /* see if we have permission to create the lock in the
5058 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
5060 code = CM_ERROR_WOULDBLOCK;
5061 else if (code == CM_ERROR_NOACCESS && Which == LockRead) {
5063 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
5065 " User has no read-lock perms, but has INSERT perms.");
5066 code = CM_ERROR_WOULDBLOCK;
5069 " User has no read-lock perms. Forcing client-side lock");
5070 force_client_lock = TRUE;
5074 /* leave any other codes as-is */
5078 int check_data_version = FALSE;
5081 /* first check if we have permission to elevate or obtain
5083 code = cm_LockCheckPerms(scp, Which, userp, reqp, &has_insert);
5085 if (code == CM_ERROR_NOACCESS && Which == LockRead &&
5086 (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp))) {
5087 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
5088 force_client_lock = TRUE;
5093 /* has_insert => (Which == LockRead, code == CM_ERROR_NOACCESS) */
5095 if (scp->serverLock == LockRead && Which == LockWrite) {
5097 /* We want to escalate the lock to a LockWrite.
5098 * Unfortunately that's not really possible without
5099 * letting go of the current lock. But for now we do
5103 " attempting to UPGRADE from LockRead to LockWrite.");
5105 " dataVersion on scp: %I64d", scp->dataVersion);
5107 /* we assume at this point (because scp->serverLock
5108 was valid) that we had a valid server lock. */
5109 scp->lockDataVersion = scp->dataVersion;
5110 check_data_version = TRUE;
5112 code = cm_IntReleaseLock(scp, userp, reqp);
5115 /* We couldn't release the lock */
5118 scp->serverLock = -1;
5122 /* We need to obtain a server lock of type Which in order
5123 * to assert this file lock */
5124 #ifndef AGGRESSIVE_LOCKS
5127 newLock = LockWrite;
5130 code = cm_IntSetLock(scp, userp, newLock, reqp);
5132 #ifdef AGGRESSIVE_LOCKS
5133 if ((code == CM_ERROR_WOULDBLOCK ||
5134 code == CM_ERROR_NOACCESS) && newLock != Which) {
5135 /* we wanted LockRead. We tried LockWrite. Now try
5140 osi_assertx(newLock == LockRead, "lock type not read");
5142 code = cm_IntSetLock(scp, userp, newLock, reqp);
5146 if (code == CM_ERROR_NOACCESS) {
5147 if (Which == LockRead) {
5148 if (has_insert && SCP_SUPPORTS_WRITELOCKACL(scp)) {
5150 /* We requested a read-lock, but we have permission to
5151 * get a write-lock. Try that */
5153 tcode = cm_LockCheckPerms(scp, LockWrite, userp, reqp, NULL);
5156 newLock = LockWrite;
5158 osi_Log0(afsd_logp, " User has 'i' perms and the request was for a LockRead. Trying to get a LockWrite instead");
5160 code = cm_IntSetLock(scp, userp, newLock, reqp);
5163 osi_Log0(afsd_logp, " User has no read-lock perms. Forcing client-side lock");
5164 force_client_lock = TRUE;
5166 } else if (Which == LockWrite &&
5167 scp->creator == userp && !SCP_SUPPORTS_WRITELOCKACL(scp)) {
5170 /* Special case: if the lock request was for a
5171 * LockWrite and the user owns the file and we weren't
5172 * allowed to obtain the serverlock, we either lost a
5173 * race (the permissions changed from under us), or we
5174 * have 'i' bits, but we aren't allowed to lock the
5177 /* check if we lost a race... */
5178 tcode = cm_LockCheckPerms(scp, Which, userp, reqp, NULL);
5181 osi_Log0(afsd_logp, " User has 'i' perms but can't obtain write locks. Using client-side locks.");
5182 force_client_lock = TRUE;
5187 if (code == 0 && check_data_version &&
5188 scp->dataVersion != scp->lockDataVersion) {
5189 /* We lost a race. Although we successfully obtained
5190 * a lock, someone modified the file in between. The
5191 * locks have all been technically lost. */
5194 " Data version mismatch while upgrading lock.");
5196 " Data versions before=%I64d, after=%I64d",
5197 scp->lockDataVersion,
5200 " Releasing stale lock for scp 0x%x", scp);
5202 code = cm_IntReleaseLock(scp, userp, reqp);
5204 scp->serverLock = -1;
5206 code = CM_ERROR_INVAL;
5207 } else if (code == 0) {
5208 scp->serverLock = newLock;
5209 scp->lockDataVersion = scp->dataVersion;
5213 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5214 scp->serverLock == -1) {
5215 /* Oops. We lost the lock. */
5216 cm_LockMarkSCacheLost(scp);
5219 } else if (code == 0) { /* server locks not enabled */
5221 " Skipping server lock for scp");
5226 if (code != 0 && !force_client_lock) {
5227 /* Special case error translations
5229 Applications don't expect certain errors from a
5230 LockFile/UnlockFile call. We need to translate some error
5231 code to codes that apps expect and handle. */
5233 /* We shouldn't actually need to handle this case since we
5234 simulate locks for RO scps anyway. */
5235 if (code == CM_ERROR_READONLY) {
5236 osi_Log0(afsd_logp, " Reinterpreting CM_ERROR_READONLY as CM_ERROR_NOACCESS");
5237 code = CM_ERROR_NOACCESS;
5241 if (code == 0 || (code == CM_ERROR_WOULDBLOCK && allowWait) ||
5242 force_client_lock) {
5244 /* clear the error if we are forcing a client lock, so we
5245 don't get confused later. */
5246 if (force_client_lock && code != CM_ERROR_WOULDBLOCK)
5251 lock_ObtainWrite(&cm_scacheLock);
5252 fileLock = cm_GetFileLock();
5254 fileLock->fid = scp->fid;
5256 fileLock->key = key;
5257 fileLock->lockType = Which;
5258 fileLock->userp = userp;
5259 fileLock->range = range;
5260 fileLock->flags = (code == 0 ? 0 :
5262 CM_FILELOCK_FLAG_WAITUNLOCK :
5263 CM_FILELOCK_FLAG_WAITLOCK));
5265 if (force_client_lock || !SERVERLOCKS_ENABLED(scp))
5266 fileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
5268 fileLock->lastUpdate = (code == 0 && !force_client_lock) ? time(NULL) : 0;
5270 osi_QAddT(&scp->fileLocksH, &scp->fileLocksT, &fileLock->fileq);
5271 cm_HoldSCacheNoLock(scp);
5272 fileLock->scp = scp;
5273 osi_QAdd(&cm_allFileLocks, &fileLock->q);
5274 lock_ReleaseWrite(&cm_scacheLock);
5280 if (IS_LOCK_CLIENTONLY(fileLock)) {
5282 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5283 if (Which == LockRead)
5286 scp->exclusiveLocks++;
5290 "cm_Lock Lock added 0x%p flags 0x%x to scp [0x%p]",
5291 fileLock, fileLock->flags, scp);
5293 " exclusives[%d] shared[%d] client[%d] serverLock[%d]",
5294 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5295 (int)(signed char) scp->serverLock);
5298 "cm_Lock Rejecting lock (code = 0x%x)", code);
5301 /* Convert from would block to lock not granted */
5302 if (code == CM_ERROR_WOULDBLOCK)
5303 code = CM_ERROR_LOCK_NOT_GRANTED;
5309 cm_IntUnlock(cm_scache_t * scp,
5315 osi_assertx(scp->sharedLocks >= 0, "scp->sharedLocks < 0");
5316 osi_assertx(scp->exclusiveLocks >= 0, "scp->exclusiveLocks < 0");
5317 osi_assertx(scp->clientLocks >= 0, "scp->clientLocks < 0");
5319 if (!SERVERLOCKS_ENABLED(scp)) {
5320 osi_Log0(afsd_logp, " Skipping server lock for scp");
5324 /* Ideally we would go through the rest of the locks to determine
5325 * if one or more locks that were formerly in WAITUNLOCK can now
5326 * be put to ACTIVE or WAITLOCK and update scp->exclusiveLocks and
5327 * scp->sharedLocks accordingly. However, the retrying of locks
5328 * in that manner is done cm_RetryLock() manually.
5331 if (scp->serverLock == LockWrite &&
5332 scp->exclusiveLocks == 0 &&
5333 scp->sharedLocks > 0) {
5334 /* The serverLock should be downgraded to LockRead */
5335 osi_Log0(afsd_logp, " DOWNGRADE lock from LockWrite to LockRead");
5337 /* Make sure there are no dirty buffers left. */
5338 code = cm_FSync(scp, userp, reqp, TRUE);
5340 /* since scp->serverLock looked sane, we are going to assume
5341 that we have a valid server lock. */
5342 scp->lockDataVersion = scp->dataVersion;
5343 osi_Log1(afsd_logp, " dataVersion on scp = %I64d", scp->dataVersion);
5345 /* before we downgrade, make sure that we have enough
5346 permissions to get the read lock. */
5347 code = cm_LockCheckPerms(scp, LockRead, userp, reqp, NULL);
5350 osi_Log0(afsd_logp, " SKIPPING downgrade because user doesn't have perms to get downgraded lock");
5356 code = cm_IntReleaseLock(scp, userp, reqp);
5359 /* so we couldn't release it. Just let the lock be for now */
5363 scp->serverLock = -1;
5366 code = cm_IntSetLock(scp, userp, LockRead, reqp);
5368 if (code == 0 && scp->lockDataVersion == scp->dataVersion) {
5369 scp->serverLock = LockRead;
5370 } else if (code == 0 && scp->lockDataVersion != scp->dataVersion) {
5371 /* We lost a race condition. Although we have a valid
5372 lock on the file, the data has changed and essentially
5373 we have lost the lock we had during the transition. */
5375 osi_Log0(afsd_logp, "Data version mismatch during lock downgrade");
5376 osi_Log2(afsd_logp, " Data versions before=%I64d, after=%I64d",
5377 scp->lockDataVersion,
5380 code = cm_IntReleaseLock(scp, userp, reqp);
5382 code = CM_ERROR_INVAL;
5383 scp->serverLock = -1;
5387 (scp->sharedLocks > 0 || scp->exclusiveLocks > 0) &&
5388 (scp->serverLock == -1)) {
5390 cm_LockMarkSCacheLost(scp);
5393 /* failure here has no bearing on the return value of cm_Unlock() */
5396 } else if (scp->serverLock != (-1) &&
5397 scp->exclusiveLocks == 0 &&
5398 scp->sharedLocks == 0) {
5399 /* The serverLock should be released entirely */
5401 if (scp->serverLock == LockWrite) {
5402 osi_Log0(afsd_logp, " RELEASE LockWrite -> LockNone");
5404 /* Make sure there are no dirty buffers left. */
5405 code = cm_FSync(scp, userp, reqp, TRUE);
5407 osi_Log0(afsd_logp, " RELEASE LockRead -> LockNone");
5410 code = cm_IntReleaseLock(scp, userp, reqp);
5413 scp->serverLock = (-1);
5419 /* Called with scp->rw held */
5420 long cm_UnlockByKey(cm_scache_t * scp,
5427 cm_file_lock_t *fileLock;
5428 osi_queue_t *q, *qn;
5431 osi_Log4(afsd_logp, "cm_UnlockByKey scp 0x%p key <0x%x,0x%x,0x%x",
5432 scp, key.process_id, key.session_id, key.file_id);
5433 osi_Log1(afsd_logp, " flags=0x%x", flags);
5435 lock_ObtainWrite(&cm_scacheLock);
5437 for (q = scp->fileLocksH; q; q = qn) {
5440 fileLock = (cm_file_lock_t *)
5441 ((char *) q - offsetof(cm_file_lock_t, fileq));
5444 osi_Log4(afsd_logp, " Checking lock[0x%x] range[%d,+%d] type[%d]",
5446 (unsigned long) fileLock->range.offset,
5447 (unsigned long) fileLock->range.length,
5448 fileLock->lockType);
5449 osi_Log4(afsd_logp, " key<0x%x, 0x%x, 0x%x> flags[0x%x]",
5450 fileLock->key.process_id, fileLock->key.session_id, fileLock->key.file_id,
5453 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5454 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5455 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5457 fileLock->fid.volume,
5458 fileLock->fid.vnode,
5459 fileLock->fid.unique);
5460 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5461 fileLock->scp->fid.cell,
5462 fileLock->scp->fid.volume,
5463 fileLock->scp->fid.vnode,
5464 fileLock->scp->fid.unique);
5465 osi_assertx(FALSE, "invalid fid value");
5469 if (!IS_LOCK_DELETED(fileLock) &&
5470 cm_KeyEquals(&fileLock->key, &key, flags)) {
5471 osi_Log3(afsd_logp, "...Unlock range [%d,+%d] type %d",
5472 fileLock->range.offset,
5473 fileLock->range.length,
5474 fileLock->lockType);
5476 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5478 if (IS_LOCK_CLIENTONLY(fileLock)) {
5480 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5481 if (fileLock->lockType == LockRead)
5484 scp->exclusiveLocks--;
5487 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5489 cm_ReleaseUser(fileLock->userp);
5490 cm_ReleaseSCacheNoLock(scp);
5492 fileLock->userp = NULL;
5493 fileLock->scp = NULL;
5499 lock_ReleaseWrite(&cm_scacheLock);
5501 if (n_unlocks == 0) {
5502 osi_Log0(afsd_logp, "cm_UnlockByKey no locks found");
5503 osi_Log3(afsd_logp, " Leaving scp with exclusives[%d], shared[%d], serverLock[%d]",
5504 scp->exclusiveLocks, scp->sharedLocks, (int)(signed char) scp->serverLock);
5509 code = cm_IntUnlock(scp, userp, reqp);
5510 osi_Log1(afsd_logp, "cm_UnlockByKey code 0x%x", code);
5512 osi_Log4(afsd_logp, " Leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5513 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5514 (int)(signed char) scp->serverLock);
5519 /* Called with scp->rw held */
5520 long cm_Unlock(cm_scache_t *scp,
5521 unsigned char sLockType,
5522 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
5529 int Which = ((sLockType & LOCKING_ANDX_SHARED_LOCK) ? LockRead : LockWrite);
5530 cm_file_lock_t *fileLock;
5532 int release_userp = FALSE;
5533 int exact_match = !(flags & CM_UNLOCK_FLAG_MATCH_RANGE);
5535 LARGE_INTEGER RangeEnd;
5537 osi_Log4(afsd_logp, "cm_Unlock scp 0x%p type 0x%x offset 0x%x length 0x%x",
5538 scp, sLockType, (unsigned long)LOffset.QuadPart, (unsigned long)LLength.QuadPart);
5539 osi_Log4(afsd_logp, "... key <0x%x,0x%x,0x%x> flags 0x%x",
5540 key.process_id, key.session_id, key.file_id, flags);
5543 RangeEnd.QuadPart = LOffset.QuadPart + LLength.QuadPart;
5546 lock_ObtainRead(&cm_scacheLock);
5548 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5549 fileLock = (cm_file_lock_t *)
5550 ((char *) q - offsetof(cm_file_lock_t, fileq));
5553 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5554 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5555 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5557 fileLock->fid.volume,
5558 fileLock->fid.vnode,
5559 fileLock->fid.unique);
5560 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5561 fileLock->scp->fid.cell,
5562 fileLock->scp->fid.volume,
5563 fileLock->scp->fid.vnode,
5564 fileLock->scp->fid.unique);
5565 osi_assertx(FALSE, "invalid fid value");
5569 if (!IS_LOCK_DELETED(fileLock) &&
5570 cm_KeyEquals(&fileLock->key, &key, 0) &&
5571 fileLock->range.offset == LOffset.QuadPart &&
5572 fileLock->range.length == LLength.QuadPart) {
5578 if (!IS_LOCK_DELETED(fileLock) &&
5579 cm_KeyEquals(&fileLock->key, &key, 0) &&
5580 fileLock->range.offset >= LOffset.QuadPart &&
5581 fileLock->range.offset < RangeEnd.QuadPart &&
5582 (fileLock->range.offset + fileLock->range.length) <= RangeEnd.QuadPart) {
5590 lock_ReleaseRead(&cm_scacheLock);
5592 if (lock_found && !exact_match) {
5596 osi_Log0(afsd_logp, "cm_Unlock lock not found; failure");
5598 /* The lock didn't exist anyway. *shrug* */
5599 return CM_ERROR_RANGE_NOT_LOCKED;
5603 /* discard lock record */
5604 lock_ConvertRToW(&cm_scacheLock);
5605 osi_QRemoveHT(&scp->fileLocksH, &scp->fileLocksT, q);
5608 * Don't delete it here; let the daemon delete it, to simplify
5609 * the daemon's traversal of the list.
5612 if (IS_LOCK_CLIENTONLY(fileLock)) {
5614 } else if (IS_LOCK_ACCEPTED(fileLock)) {
5615 if (fileLock->lockType == LockRead)
5618 scp->exclusiveLocks--;
5621 fileLock->flags |= CM_FILELOCK_FLAG_DELETED;
5623 if (userp != NULL) {
5624 cm_ReleaseUser(fileLock->userp);
5626 userp = fileLock->userp;
5627 release_userp = TRUE;
5629 cm_ReleaseSCacheNoLock(scp);
5630 fileLock->userp = NULL;
5631 fileLock->scp = NULL;
5632 lock_ReleaseWrite(&cm_scacheLock);
5634 code = cm_IntUnlock(scp, userp, reqp);
5636 if (release_userp) {
5637 cm_ReleaseUser(userp);
5638 release_userp = FALSE;
5642 osi_Log1(afsd_logp, "cm_Unlock not exact match, searching for next lock, code 0x%x", code);
5643 goto try_again; /* might be more than one lock in the range */
5648 osi_Log1(afsd_logp, "cm_Unlock code 0x%x", code);
5649 osi_Log4(afsd_logp, " leaving scp with excl[%d], shared[%d], client[%d], serverLock[%d]",
5650 scp->exclusiveLocks, scp->sharedLocks, scp->clientLocks,
5651 (int)(signed char) scp->serverLock);
5656 /* called with scp->rw held */
5657 void cm_LockMarkSCacheLost(cm_scache_t * scp)
5659 cm_file_lock_t *fileLock;
5662 osi_Log1(afsd_logp, "cm_LockMarkSCacheLost scp 0x%x", scp);
5664 /* cm_scacheLock needed because we are modifying fileLock->flags */
5665 lock_ObtainWrite(&cm_scacheLock);
5667 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
5669 (cm_file_lock_t *)((char *) q - offsetof(cm_file_lock_t, fileq));
5671 if (IS_LOCK_ACTIVE(fileLock) &&
5672 !IS_LOCK_CLIENTONLY(fileLock)) {
5673 if (fileLock->lockType == LockRead)
5676 scp->exclusiveLocks--;
5678 fileLock->flags |= CM_FILELOCK_FLAG_LOST;
5682 scp->serverLock = -1;
5683 scp->lockDataVersion = CM_SCACHE_VERSION_BAD;
5684 lock_ReleaseWrite(&cm_scacheLock);
5687 /* Called with no relevant locks held */
5688 void cm_CheckLocks()
5690 osi_queue_t *q, *nq;
5691 cm_file_lock_t *fileLock;
5697 struct rx_connection * rxconnp;
5700 memset(&volSync, 0, sizeof(volSync));
5704 lock_ObtainWrite(&cm_scacheLock);
5706 cm_lockRefreshCycle++;
5708 osi_Log1(afsd_logp, "cm_CheckLocks starting lock check cycle %d", cm_lockRefreshCycle);
5710 for (q = cm_allFileLocks; q; q = nq) {
5711 fileLock = (cm_file_lock_t *) q;
5715 if (IS_LOCK_DELETED(fileLock)) {
5716 cm_user_t *userp = fileLock->userp;
5717 cm_scache_t *scp = fileLock->scp;
5718 fileLock->userp = NULL;
5719 fileLock->scp = NULL;
5722 lock_ReleaseWrite(&cm_scacheLock);
5723 lock_ObtainWrite(&scp->rw);
5724 code = cm_IntUnlock(scp, userp, &req);
5725 lock_ReleaseWrite(&scp->rw);
5727 cm_ReleaseUser(userp);
5728 lock_ObtainWrite(&cm_scacheLock);
5729 cm_ReleaseSCacheNoLock(scp);
5731 osi_QRemove(&cm_allFileLocks, q);
5732 cm_PutFileLock(fileLock);
5734 } else if (IS_LOCK_ACTIVE(fileLock) && !IS_LOCK_CLIENTONLY(fileLock)) {
5736 /* Server locks must have been enabled for us to have
5737 received an active non-client-only lock. */
5738 osi_assertx(cm_enableServerLocks, "!cm_enableServerLocks");
5740 scp = fileLock->scp;
5741 osi_assertx(scp != NULL, "null cm_scache_t");
5743 cm_HoldSCacheNoLock(scp);
5746 if (cm_FidCmp(&fileLock->fid, &fileLock->scp->fid)) {
5747 osi_Log0(afsd_logp, "!!fileLock->fid != scp->fid");
5748 osi_Log4(afsd_logp, " fileLock->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5750 fileLock->fid.volume,
5751 fileLock->fid.vnode,
5752 fileLock->fid.unique);
5753 osi_Log4(afsd_logp, " scp->fid(cell=[%d], volume=[%d], vnode=[%d], unique=[%d]",
5754 fileLock->scp->fid.cell,
5755 fileLock->scp->fid.volume,
5756 fileLock->scp->fid.vnode,
5757 fileLock->scp->fid.unique);
5758 osi_assertx(FALSE, "invalid fid");
5761 /* Server locks are extended once per scp per refresh
5763 if (scp->lastRefreshCycle != cm_lockRefreshCycle) {
5765 int scp_done = FALSE;
5767 osi_Log1(afsd_logp, "cm_CheckLocks Updating scp 0x%x", scp);
5769 lock_ReleaseWrite(&cm_scacheLock);
5770 lock_ObtainWrite(&scp->rw);
5772 /* did the lock change while we weren't holding the lock? */
5773 if (!IS_LOCK_ACTIVE(fileLock))
5774 goto post_syncopdone;
5776 code = cm_SyncOp(scp, NULL, fileLock->userp, &req, 0,
5777 CM_SCACHESYNC_NEEDCALLBACK
5778 | CM_SCACHESYNC_GETSTATUS
5779 | CM_SCACHESYNC_LOCK);
5783 "cm_CheckLocks SyncOp failure code 0x%x", code);
5784 goto post_syncopdone;
5787 /* cm_SyncOp releases scp->rw during which the lock
5788 may get released. */
5789 if (!IS_LOCK_ACTIVE(fileLock))
5790 goto pre_syncopdone;
5792 if (scp->serverLock != -1 && !(scp->flags & CM_SCACHEFLAG_DELETED)) {
5796 tfid.Volume = scp->fid.volume;
5797 tfid.Vnode = scp->fid.vnode;
5798 tfid.Unique = scp->fid.unique;
5800 userp = fileLock->userp;
5802 osi_Log3(afsd_logp, "CALL ExtendLock lock 0x%p for scp=0x%p with lock %d",
5805 (int) scp->serverLock);
5807 lock_ReleaseWrite(&scp->rw);
5810 code = cm_ConnFromFID(&cfid, userp,
5815 rxconnp = cm_GetRxConn(connp);
5816 code = RXAFS_ExtendLock(rxconnp, &tfid,
5818 rx_PutConnection(rxconnp);
5820 osi_Log1(afsd_logp, " ExtendLock returns %d", code);
5822 } while (cm_Analyze(connp, userp, &req,
5823 &cfid, NULL, 1, NULL, &volSync, NULL, NULL,
5826 code = cm_MapRPCError(code, &req);
5828 lock_ObtainWrite(&scp->rw);
5831 osi_Log1(afsd_logp, "CALL ExtendLock FAILURE, code 0x%x", code);
5832 scp->fsLockCount = 0;
5834 osi_Log0(afsd_logp, "CALL ExtendLock SUCCESS");
5835 scp->lockDataVersion = scp->dataVersion;
5838 if ((code == EINVAL || code == CM_ERROR_INVAL) &&
5839 scp->lockDataVersion == scp->dataVersion) {
5843 (scp->exclusiveLocks > 0) ? LockWrite: LockRead;
5845 /* we might still have a chance to obtain a
5848 code = cm_IntSetLock(scp, userp, lockType, &req);
5851 code = CM_ERROR_INVAL;
5852 } else if (scp->lockDataVersion != scp->dataVersion) {
5854 /* now check if we still have the file at
5855 the right data version. */
5857 "Data version mismatch on scp 0x%p",
5860 " Data versions: before=%I64d, after=%I64d",
5861 scp->lockDataVersion,
5864 code = cm_IntReleaseLock(scp, userp, &req);
5866 code = CM_ERROR_INVAL;
5870 if (code == EINVAL || code == CM_ERROR_INVAL ||
5871 code == CM_ERROR_BADFD) {
5872 cm_LockMarkSCacheLost(scp);
5876 /* interestingly, we have found an active lock
5877 belonging to an scache that has no
5879 cm_LockMarkSCacheLost(scp);
5886 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_LOCK);
5889 lock_ReleaseWrite(&scp->rw);
5891 lock_ObtainWrite(&cm_scacheLock);
5894 fileLock->lastUpdate = time(NULL);
5898 scp->lastRefreshCycle = cm_lockRefreshCycle;
5901 /* we have already refreshed the locks on this scp */
5902 fileLock->lastUpdate = time(NULL);
5905 cm_ReleaseSCacheNoLock(scp);
5907 } else if (IS_LOCK_ACTIVE(fileLock) && IS_LOCK_CLIENTONLY(fileLock)) {
5908 /* TODO: Check callbacks */
5912 lock_ReleaseWrite(&cm_scacheLock);
5913 osi_Log1(afsd_logp, "cm_CheckLocks completes lock check cycle %d", cm_lockRefreshCycle);
5916 /* NOT called with scp->rw held. */
5917 long cm_RetryLock(cm_file_lock_t *oldFileLock, int client_is_dead)
5920 cm_scache_t *scp = NULL;
5921 cm_file_lock_t *fileLock;
5925 int force_client_lock = FALSE;
5926 int has_insert = FALSE;
5927 int check_data_version = FALSE;
5931 if (client_is_dead) {
5932 code = CM_ERROR_TIMEDOUT;
5936 lock_ObtainRead(&cm_scacheLock);
5938 osi_Log2(afsd_logp, "cm_RetryLock checking lock %p (scp=%p)", oldFileLock, oldFileLock->scp);
5939 osi_Log4(afsd_logp, " offset(%x:%x) length(%x:%x)",
5940 (unsigned)(oldFileLock->range.offset >> 32),
5941 (unsigned)(oldFileLock->range.offset & 0xffffffff),
5942 (unsigned)(oldFileLock->range.length >> 32),
5943 (unsigned)(oldFileLock->range.length & 0xffffffff));
5944 osi_Log4(afsd_logp, " key<0x%x,0x%x,0x%x> flags=%x",
5945 oldFileLock->key.process_id, oldFileLock->key.session_id, oldFileLock->key.file_id,
5946 (unsigned)(oldFileLock->flags));
5948 /* if the lock has already been granted, then we have nothing to do */
5949 if (IS_LOCK_ACTIVE(oldFileLock)) {
5950 lock_ReleaseRead(&cm_scacheLock);
5951 osi_Log0(afsd_logp, "cm_RetryLock lock already granted");
5955 /* we can't do anything with lost or deleted locks at the moment. */
5956 if (IS_LOCK_LOST(oldFileLock) || IS_LOCK_DELETED(oldFileLock)) {
5957 code = CM_ERROR_BADFD;
5958 osi_Log0(afsd_logp, "cm_RetryLock lock is lost or deleted");
5959 lock_ReleaseRead(&cm_scacheLock);
5963 scp = oldFileLock->scp;
5965 osi_assertx(scp != NULL, "null cm_scache_t");
5967 lock_ReleaseRead(&cm_scacheLock);
5968 lock_ObtainWrite(&scp->rw);
5970 code = cm_LockCheckPerms(scp, oldFileLock->lockType,
5974 if (code == CM_ERROR_NOACCESS && oldFileLock->lockType == LockRead) {
5975 if (!has_insert || !SCP_SUPPORTS_WRITELOCKACL(scp)) {
5976 force_client_lock = TRUE;
5980 lock_ReleaseWrite(&scp->rw);
5984 lock_ObtainWrite(&cm_scacheLock);
5986 /* Check if we already have a sufficient server lock to allow this
5987 lock to go through. */
5988 if (IS_LOCK_WAITLOCK(oldFileLock) &&
5989 (!SERVERLOCKS_ENABLED(scp) ||
5990 scp->serverLock == oldFileLock->lockType ||
5991 scp->serverLock == LockWrite)) {
5993 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
5995 if (SERVERLOCKS_ENABLED(scp)) {
5996 osi_Log1(afsd_logp, "cm_RetryLock Server lock (%d) is sufficient for lock. Granting",
5997 (int) scp->serverLock);
5999 osi_Log0(afsd_logp, "cm_RetryLock skipping server lock for scp");
6002 lock_ReleaseWrite(&cm_scacheLock);
6003 lock_ReleaseWrite(&scp->rw);
6008 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
6010 /* check if the conflicting locks have dissappeared already */
6011 for (q = scp->fileLocksH; q; q = osi_QNext(q)) {
6013 fileLock = (cm_file_lock_t *)
6014 ((char *) q - offsetof(cm_file_lock_t, fileq));
6016 if (IS_LOCK_LOST(fileLock)) {
6017 if (cm_KeyEquals(&fileLock->key, &oldFileLock->key, 0)) {
6018 code = CM_ERROR_BADFD;
6019 oldFileLock->flags |= CM_FILELOCK_FLAG_LOST;
6020 osi_Log1(afsd_logp, " found lost lock %p for same key. Marking lock as lost",
6023 } else if (fileLock->lockType == LockWrite &&
6024 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
6025 osi_Log1(afsd_logp, " found conflicting LOST lock %p", fileLock);
6026 code = CM_ERROR_WOULDBLOCK;
6031 if (IS_LOCK_ACCEPTED(fileLock) &&
6032 INTERSECT_RANGE(oldFileLock->range, fileLock->range)) {
6034 if (oldFileLock->lockType != LockRead ||
6035 fileLock->lockType != LockRead) {
6037 osi_Log1(afsd_logp, " found conflicting lock %p", fileLock);
6038 code = CM_ERROR_WOULDBLOCK;
6046 lock_ReleaseWrite(&cm_scacheLock);
6047 lock_ReleaseWrite(&scp->rw);
6052 /* when we get here, the lock is either a WAITUNLOCK or WAITLOCK.
6053 If it is WAITUNLOCK, then we didn't find any conflicting lock
6054 but we haven't verfied whether the serverLock is sufficient to
6055 assert it. If it is WAITLOCK, then the serverLock is
6056 insufficient to assert it. Eitherway, we are ready to accept
6057 the lock as either ACTIVE or WAITLOCK depending on the
6060 /* First, promote the WAITUNLOCK to a WAITLOCK */
6061 if (IS_LOCK_WAITUNLOCK(oldFileLock)) {
6062 if (oldFileLock->lockType == LockRead)
6065 scp->exclusiveLocks++;
6067 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITUNLOCK;
6068 oldFileLock->flags |= CM_FILELOCK_FLAG_WAITLOCK;
6071 osi_assertx(IS_LOCK_WAITLOCK(oldFileLock), "!IS_LOCK_WAITLOCK");
6073 if (force_client_lock ||
6074 !SERVERLOCKS_ENABLED(scp) ||
6075 scp->serverLock == oldFileLock->lockType ||
6076 (oldFileLock->lockType == LockRead &&
6077 scp->serverLock == LockWrite)) {
6079 oldFileLock->flags &= ~CM_FILELOCK_FLAG_WAITLOCK;
6081 if ((force_client_lock ||
6082 !SERVERLOCKS_ENABLED(scp)) &&
6083 !IS_LOCK_CLIENTONLY(oldFileLock)) {
6085 oldFileLock->flags |= CM_FILELOCK_FLAG_CLIENTONLY;
6087 if (oldFileLock->lockType == LockRead)
6090 scp->exclusiveLocks--;
6095 lock_ReleaseWrite(&cm_scacheLock);
6096 lock_ReleaseWrite(&scp->rw);
6103 code = cm_SyncOp(scp, NULL, oldFileLock->userp, &req, 0,
6104 CM_SCACHESYNC_NEEDCALLBACK
6105 | CM_SCACHESYNC_GETSTATUS
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);