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 <afs/param.h>
26 /* Used by cm_FollowMountPoint */
32 extern void afsi_log(char *pattern, ...);
35 unsigned int cm_mountRootGen = 0;
38 * Case-folding array. This was constructed by inspecting of SMBtrace output.
39 * I do not know anything more about it.
41 unsigned char cm_foldUpper[256] = {
42 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
43 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
44 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
45 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
46 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
47 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
48 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
49 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
50 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
51 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
52 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
53 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
54 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
55 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
56 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
57 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
58 0x80, 0x9a, 0x90, 0x41, 0x8e, 0x41, 0x8f, 0x80,
59 0x45, 0x45, 0x45, 0x49, 0x49, 0x49, 0x8e, 0x8f,
60 0x90, 0x92, 0x92, 0x4f, 0x99, 0x4f, 0x55, 0x55,
61 0x59, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
62 0x41, 0x49, 0x4f, 0x55, 0xa5, 0xa5, 0x56, 0xa7,
63 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
64 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
65 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
66 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
67 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
68 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
69 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
70 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
71 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
72 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
73 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
77 * Case-insensitive string comparison. We used to use stricmp, but it doesn't
78 * know about 8-bit characters (e.g. 129 is lowercase u-umlaut, 154 is
79 * upper-case u-umlaut).
81 int cm_stricmp(const char *str1, const char *str2)
93 c1 = (char) cm_foldUpper[(unsigned char)(*str1++)];
94 c2 = (char) cm_foldUpper[(unsigned char)(*str2++)];
102 /* characters that are legal in an 8.3 name */
104 * We used to have 1's for all characters from 128 to 254. But
105 * the NT client behaves better if we create an 8.3 name for any
106 * name that has a character with the high bit on, and if we
107 * delete those characters from 8.3 names. In particular, see
108 * Sybase defect 10859.
110 char cm_LegalChars[256] = {
111 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
112 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
113 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0,
114 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
115 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
116 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1,
117 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
118 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1,
119 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
120 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
121 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
122 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
123 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
124 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
125 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
126 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
129 /* return true iff component is a valid 8.3 name */
130 int cm_Is8Dot3(char *namep)
133 int sawUpper = 0, sawLower = 0;
138 * can't have a leading dot;
139 * special case for . and ..
141 if (namep[0] == '.') {
144 if (namep[1] == '.' && namep[2] == 0)
148 while (tc = *namep++) {
150 /* saw another dot */
151 if (sawDot) return 0; /* second dot */
156 if (cm_LegalChars[tc] == 0)
158 if (tc >= 'A' && tc <= 'Z')
160 else if (tc >= 'a' && tc <= 'z')
163 if (!sawDot && charCount > 8)
164 /* more than 8 chars in name */
166 if (sawDot && charCount > 3)
167 /* more than 3 chars in extension */
171 * Used to check that all characters were the same case.
172 * This doesn't help 16-bit apps, and meanwhile it causes the
173 * MS-DOS Command Prompt to misbehave; see Sybase defect 10709.
175 if (sawUpper && sawLower)
182 * Number unparsing map for generating 8.3 names;
185 char cm_8Dot3Mapping[41] =
186 {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
187 'B', 'C', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S',
188 'T', 'V', 'W', 'X', 'Y', 'Z', '_', '-', '$', '#', '@', '%', '!', '&', 'E', 'O'
190 int cm_8Dot3MapSize = sizeof(cm_8Dot3Mapping);
192 void cm_Gen8Dot3Name(cm_dirEntry_t *dep, char *shortName, char **shortNameEndp)
196 int vnode = ntohl(dep->fid.vnode);
198 int validExtension = 0;
199 char tc, *temp, *name;
201 /* Unparse the file's vnode number to get a "uniquifier" */
203 number[nsize] = cm_8Dot3Mapping[vnode % cm_8Dot3MapSize];
205 vnode /= cm_8Dot3MapSize;
209 * Look for valid extension. There has to be a dot, and
210 * at least one of the characters following has to be legal.
212 lastDot = strrchr(dep->name, '.');
214 temp = lastDot; temp++;
216 if (cm_LegalChars[tc])
222 /* Copy name characters */
224 for (i = 0, name = dep->name;
225 i < (7 - nsize) && name != lastDot; ) {
230 if (!cm_LegalChars[tc])
233 *shortName++ = toupper(tc);
239 /* Copy uniquifier characters */
240 memcpy(shortName, number, nsize);
243 if (validExtension) {
244 /* Copy extension characters */
245 *shortName++ = *lastDot++; /* copy dot */
246 for (i = 0, tc = *lastDot++;
249 if (cm_LegalChars[tc]) {
251 *shortName++ = toupper(tc);
260 *shortNameEndp = shortName;
263 /* return success if we can open this file in this mode */
264 long cm_CheckOpen(cm_scache_t *scp, int openMode, int trunc, cm_user_t *userp,
271 if (openMode != 1) rights |= PRSFS_READ;
272 if (openMode == 1 || openMode == 2 || trunc) rights |= PRSFS_WRITE;
274 lock_ObtainMutex(&scp->mx);
276 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
277 CM_SCACHESYNC_GETSTATUS
278 | CM_SCACHESYNC_NEEDCALLBACK);
279 lock_ReleaseMutex(&scp->mx);
284 /* return success if we can open this file in this mode */
285 long cm_CheckNTOpen(cm_scache_t *scp, unsigned int desiredAccess,
286 unsigned int createDisp, cm_user_t *userp, cm_req_t *reqp)
291 /* Always allow delete; the RPC will tell us if it's OK */
292 if (desiredAccess == DELETE)
297 if (desiredAccess & AFS_ACCESS_READ)
298 rights |= PRSFS_READ;
300 if ((desiredAccess & AFS_ACCESS_WRITE)
302 rights |= PRSFS_WRITE;
304 lock_ObtainMutex(&scp->mx);
306 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
307 CM_SCACHESYNC_GETSTATUS
308 | CM_SCACHESYNC_NEEDCALLBACK);
309 lock_ReleaseMutex(&scp->mx);
312 * If the open will fail because the volume is readonly, then we will
313 * return an access denied error instead. This is to help brain-dead
314 * apps run correctly on replicated volumes.
315 * See defect 10007 for more information.
317 if (code == CM_ERROR_READONLY)
318 code = CM_ERROR_NOACCESS;
324 * When CAP_NT_SMBS has been negotiated, deletion (of files or directories) is
325 * done in three steps:
326 * (1) open for deletion (NT_CREATE_AND_X)
327 * (2) set for deletion on close (NTWTRANSACTION2, SET_FILE_INFO)
329 * We must not do the RPC until step 3. But if we are going to return an error
330 * code (e.g. directory not empty), we must return it by step 2, otherwise most
331 * clients will not notice it. So we do a preliminary check. For deleting
332 * files, this is almost free, since we have already done the RPC to get the
333 * parent directory's status bits. But for deleting directories, we must do an
334 * additional RPC to get the directory's data to check if it is empty. Sigh.
336 long cm_CheckNTDelete(cm_scache_t *dscp, cm_scache_t *scp, cm_user_t *userp,
343 unsigned short *hashTable;
345 int BeyondPage = 0, HaveDot = 0, HaveDotDot = 0;
347 /* First check permissions */
348 lock_ObtainMutex(&dscp->mx);
349 code = cm_SyncOp(dscp, NULL, userp, reqp, PRSFS_DELETE,
350 CM_SCACHESYNC_GETSTATUS
351 | CM_SCACHESYNC_NEEDCALLBACK);
352 lock_ReleaseMutex(&dscp->mx);
356 /* If deleting directory, must be empty */
358 if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
361 thyper.HighPart = 0; thyper.LowPart = 0;
362 lock_ObtainRead(&scp->bufCreateLock);
363 code = buf_Get(scp, &thyper, &bufferp);
364 lock_ReleaseRead(&scp->bufCreateLock);
368 lock_ObtainMutex(&bufferp->mx);
369 lock_ObtainMutex(&scp->mx);
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_ReleaseMutex(&scp->mx);
385 lock_ObtainMutex(&bufferp->mx);
386 lock_ObtainMutex(&scp->mx);
391 /* We try to determine emptiness without looking beyond the first page,
392 * and without assuming "." and ".." are present and are on the first
393 * page (though these assumptions might, after all, be reasonable).
395 hashTable = (unsigned short *)(bufferp->datap + (32 * 5));
396 for (i=0; i<128; i++) {
397 idx = ntohs(hashTable[i]);
403 dep = (cm_dirEntry_t *)(bufferp->datap + (32 * idx));
404 if (strcmp(dep->name, ".") == 0)
406 else if (strcmp(dep->name, "..") == 0)
409 code = CM_ERROR_NOTEMPTY;
412 idx = ntohs(dep->next);
415 if (BeyondPage && HaveDot && HaveDotDot)
416 code = CM_ERROR_NOTEMPTY;
420 lock_ReleaseMutex(&bufferp->mx);
421 buf_Release(bufferp);
422 lock_ReleaseMutex(&scp->mx);
427 * Iterate through all entries in a directory.
428 * When the function funcp is called, the buffer is locked but the
429 * directory vnode is not.
431 long cm_ApplyDir(cm_scache_t *scp, cm_DirFuncp_t funcp, void *parmp,
432 osi_hyper_t *startOffsetp, cm_user_t *userp, cm_req_t *reqp,
433 cm_scache_t **retscp)
440 osi_hyper_t dirLength;
441 osi_hyper_t bufferOffset;
442 osi_hyper_t curOffset;
446 cm_pageHeader_t *pageHeaderp;
448 long nextEntryCookie;
449 int numDirChunks; /* # of 32 byte dir chunks in this entry */
451 /* get the directory size */
452 lock_ObtainMutex(&scp->mx);
453 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_LOOKUP,
454 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
456 lock_ReleaseMutex(&scp->mx);
460 if (scp->fileType != CM_SCACHETYPE_DIRECTORY) {
461 lock_ReleaseMutex(&scp->mx);
462 return CM_ERROR_NOTDIR;
465 if (retscp) /* if this is a lookup call */
467 cm_lookupSearch_t* sp = parmp;
468 int casefold = sp->caseFold;
470 sp->caseFold = 0; /* we have a strong preference for exact matches */
471 if ( *retscp = cm_dnlcLookup(scp, sp)) /* dnlc hit */
473 sp->caseFold = casefold;
474 lock_ReleaseMutex(&scp->mx);
478 sp->caseFold = casefold;
482 * XXX We only get the length once. It might change when we drop the
485 dirLength = scp->length;
487 lock_ReleaseMutex(&scp->mx);
490 bufferOffset.LowPart = bufferOffset.HighPart = 0;
492 curOffset = *startOffsetp;
494 curOffset.HighPart = 0;
495 curOffset.LowPart = 0;
499 /* make sure that curOffset.LowPart doesn't point to the first
500 * 32 bytes in the 2nd through last dir page, and that it
501 * doesn't point at the first 13 32-byte chunks in the first
502 * dir page, since those are dir and page headers, and don't
503 * contain useful information.
505 temp = curOffset.LowPart & (2048-1);
506 if (curOffset.HighPart == 0 && curOffset.LowPart < 2048) {
507 /* we're in the first page */
508 if (temp < 13*32) temp = 13*32;
511 /* we're in a later dir page */
512 if (temp < 32) temp = 32;
515 /* make sure the low order 5 bits are zero */
518 /* now put temp bits back ito curOffset.LowPart */
519 curOffset.LowPart &= ~(2048-1);
520 curOffset.LowPart |= temp;
522 /* check if we've passed the dir's EOF */
523 if (LargeIntegerGreaterThanOrEqualTo(curOffset, dirLength))
526 /* see if we can use the bufferp we have now; compute in which
527 * page the current offset would be, and check whether that's
528 * the offset of the buffer we have. If not, get the buffer.
530 thyper.HighPart = curOffset.HighPart;
531 thyper.LowPart = curOffset.LowPart & ~(buf_bufferSize-1);
532 if (!bufferp || !LargeIntegerEqualTo(thyper, bufferOffset)) {
535 lock_ReleaseMutex(&bufferp->mx);
536 buf_Release(bufferp);
540 lock_ObtainRead(&scp->bufCreateLock);
541 code = buf_Get(scp, &thyper, &bufferp);
542 lock_ReleaseRead(&scp->bufCreateLock);
544 lock_ObtainMutex(&bufferp->mx);
546 bufferOffset = thyper;
548 /* now get the data in the cache */
550 lock_ObtainMutex(&scp->mx);
551 code = cm_SyncOp(scp, bufferp, userp, reqp,
553 CM_SCACHESYNC_NEEDCALLBACK
555 | CM_SCACHESYNC_BUFLOCKED);
557 lock_ReleaseMutex(&scp->mx);
561 if (cm_HaveBuffer(scp, bufferp, 1)) {
562 lock_ReleaseMutex(&scp->mx);
566 /* otherwise, load the buffer and try again */
567 lock_ReleaseMutex(&bufferp->mx);
568 code = cm_GetBuffer(scp, bufferp, NULL, userp,
570 lock_ReleaseMutex(&scp->mx);
571 lock_ObtainMutex(&bufferp->mx);
575 lock_ReleaseMutex(&bufferp->mx);
576 buf_Release(bufferp);
580 } /* if (wrong buffer) ... */
582 /* now we have the buffer containing the entry we're interested
583 * in; copy it out if it represents a non-deleted entry.
585 entryInDir = curOffset.LowPart & (2048-1);
586 entryInBuffer = curOffset.LowPart & (buf_bufferSize - 1);
588 /* page header will help tell us which entries are free. Page
589 * header can change more often than once per buffer, since
590 * AFS 3 dir page size may be less than (but not more than) a
591 * buffer package buffer.
593 /* only look intra-buffer */
594 temp = curOffset.LowPart & (buf_bufferSize - 1);
595 temp &= ~(2048 - 1); /* turn off intra-page bits */
596 pageHeaderp = (cm_pageHeader_t *) (bufferp->datap + temp);
598 /* now determine which entry we're looking at in the page. If
599 * it is free (there's a free bitmap at the start of the dir),
600 * we should skip these 32 bytes.
602 slotInPage = (entryInDir & 0x7e0) >> 5;
603 if (!(pageHeaderp->freeBitmap[slotInPage>>3]
604 & (1 << (slotInPage & 0x7)))) {
605 /* this entry is free */
606 numDirChunks = 1; /* only skip this guy */
610 tp = bufferp->datap + entryInBuffer;
611 dep = (cm_dirEntry_t *) tp; /* now points to AFS3 dir entry */
613 /* while we're here, compute the next entry's location, too,
614 * since we'll need it when writing out the cookie into the
615 * dir listing stream.
617 numDirChunks = cm_NameEntries(dep->name, NULL);
619 /* compute the offset of the cookie representing the next entry */
620 nextEntryCookie = curOffset.LowPart
621 + (CM_DIR_CHUNKSIZE * numDirChunks);
623 if (dep->fid.vnode != 0) {
624 /* this is one of the entries to use: it is not deleted */
625 code = (*funcp)(scp, dep, parmp, &curOffset);
627 } /* if we're including this name */
630 /* and adjust curOffset to be where the new cookie is */
632 thyper.LowPart = CM_DIR_CHUNKSIZE * numDirChunks;
633 curOffset = LargeIntegerAdd(thyper, curOffset);
634 } /* while copying data for dir listing */
636 /* release the mutex */
638 lock_ReleaseMutex(&bufferp->mx);
639 buf_Release(bufferp);
644 int cm_NoneUpper(char *s)
648 if (c >= 'A' && c <= 'Z')
653 int cm_NoneLower(char *s)
657 if (c >= 'a' && c <= 'z')
662 long cm_LookupSearchProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
665 cm_lookupSearch_t *sp;
670 sp = (cm_lookupSearch_t *) rockp;
672 matchName = dep->name;
674 match = cm_stricmp(matchName, sp->searchNamep);
676 match = strcmp(matchName, sp->searchNamep);
680 && !cm_Is8Dot3(dep->name)) {
681 matchName = shortName;
682 cm_Gen8Dot3Name(dep, shortName, NULL);
684 match = cm_stricmp(matchName, sp->searchNamep);
686 match = strcmp(matchName, sp->searchNamep);
693 if(!sp->caseFold) sp->ExactFound = 1;
695 if (!sp->caseFold || matchName == shortName) {
696 sp->fid.vnode = ntohl(dep->fid.vnode);
697 sp->fid.unique = ntohl(dep->fid.unique);
698 return CM_ERROR_STOPNOW;
702 * If we get here, we are doing a case-insensitive search, and we
703 * have found a match. Now we determine what kind of match it is:
704 * exact, lower-case, upper-case, or none of the above. This is done
705 * in order to choose among matches, if there are more than one.
708 /* Exact matches are the best. */
709 match = strcmp(matchName, sp->searchNamep);
712 sp->fid.vnode = ntohl(dep->fid.vnode);
713 sp->fid.unique = ntohl(dep->fid.unique);
714 return CM_ERROR_STOPNOW;
717 /* Lower-case matches are next. */
720 if (cm_NoneUpper(matchName)) {
725 /* Upper-case matches are next. */
728 if (cm_NoneLower(matchName)) {
733 /* General matches are last. */
739 sp->fid.vnode = ntohl(dep->fid.vnode);
740 sp->fid.unique = ntohl(dep->fid.unique);
744 /* read the contents of a mount point into the appropriate string.
745 * called with locked scp, and returns with locked scp.
747 long cm_ReadMountPoint(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp)
754 if (scp->mountPointStringp) return 0;
756 /* otherwise, we have to read it in */
757 lock_ReleaseMutex(&scp->mx);
759 lock_ObtainRead(&scp->bufCreateLock);
760 thyper.LowPart = thyper.HighPart = 0;
761 code = buf_Get(scp, &thyper, &bufp);
762 lock_ReleaseRead(&scp->bufCreateLock);
764 lock_ObtainMutex(&scp->mx);
769 code = cm_SyncOp(scp, bufp, userp, reqp, 0,
770 CM_SCACHESYNC_READ | CM_SCACHESYNC_NEEDCALLBACK);
775 if (cm_HaveBuffer(scp, bufp, 0)) break;
777 /* otherwise load buffer */
778 code = cm_GetBuffer(scp, bufp, NULL, userp, reqp);
783 /* locked, has callback, has valid data in buffer */
784 if ((tlen = scp->length.LowPart) > 1000) return CM_ERROR_TOOBIG;
786 code = CM_ERROR_INVAL;
790 /* someone else did the work while we were out */
791 if (scp->mountPointStringp) {
796 /* otherwise, copy out the link */
797 scp->mountPointStringp = malloc(tlen);
798 memcpy(scp->mountPointStringp, bufp->datap, tlen);
800 /* now make it null-terminated. Note that the original contents of a
801 * link that is a mount point is "#volname." where "." is there just to
802 * be turned into a null. That is, we can trash the last char of the
803 * link without damaging the vol name. This is a stupid convention,
804 * but that's the protocol.
806 scp->mountPointStringp[tlen-1] = 0;
810 if (bufp) buf_Release(bufp);
814 /* called with a locked scp and chases the mount point, yielding outScpp.
815 * scp remains locked, just for simplicity of describing the interface.
817 long cm_FollowMountPoint(cm_scache_t *scp, cm_scache_t *dscp, cm_user_t *userp,
818 cm_req_t *reqp, cm_scache_t **outScpp)
833 if (scp->mountRootFidp && scp->mountRootGen >= cm_mountRootGen) {
834 tfid = *scp->mountRootFidp;
835 lock_ReleaseMutex(&scp->mx);
836 code = cm_GetSCache(&tfid, outScpp, userp, reqp);
837 lock_ObtainMutex(&scp->mx);
841 /* parse the volume name */
842 mpNamep = scp->mountPointStringp;
844 tlen = strlen(scp->mountPointStringp);
845 mtType = *scp->mountPointStringp;
846 cellNamep = malloc(tlen);
847 volNamep = malloc(tlen);
849 cp = strrchr(mpNamep, ':');
851 /* cellular mount point */
852 memset(cellNamep, 0, tlen);
853 strncpy(cellNamep, mpNamep+1, cp - mpNamep - 1);
854 strcpy(volNamep, cp+1);
855 /* now look up the cell */
856 cellp = cm_GetCell(cellNamep, CM_FLAG_CREATE);
860 strcpy(volNamep, mpNamep+1);
862 cellp = cm_FindCellByID(scp->fid.cell);
866 code = CM_ERROR_NOSUCHCELL;
870 vnLength = strlen(volNamep);
871 if (vnLength >= 8 && strcmp(volNamep + vnLength - 7, ".backup") == 0)
873 else if (vnLength >= 10
874 && strcmp(volNamep + vnLength - 9, ".readonly") == 0)
879 /* check for backups within backups */
881 && (scp->flags & (CM_SCACHEFLAG_RO | CM_SCACHEFLAG_PURERO))
882 == CM_SCACHEFLAG_RO) {
883 code = CM_ERROR_NOSUCHVOLUME;
887 /* now we need to get the volume */
888 lock_ReleaseMutex(&scp->mx);
889 code = cm_GetVolumeByName(cellp, volNamep, userp, reqp, 0, &volp);
890 lock_ObtainMutex(&scp->mx);
893 /* save the parent of the volume root for this is the
894 * place where the volume is mounted and we must remember
895 * this in the volume structure rather than just in the
896 * scache entry lest the scache entry gets recycled
899 lock_ObtainMutex(&volp->mx);
900 if(volp->dotdotFidp == (cm_fid_t *) NULL)
901 volp->dotdotFidp = (cm_fid_t *) malloc(sizeof(cm_fid_t));
902 *(volp->dotdotFidp) = dscp->fid;
903 lock_ReleaseMutex(&volp->mx);
905 if (scp->mountRootFidp == 0) {
906 scp->mountRootFidp = malloc(sizeof(cm_fid_t));
908 scp->mountRootFidp->cell = cellp->cellID;
909 /* if the mt pt is in a read-only volume (not just a
910 * backup), and if there is a read-only volume for the
911 * target, and if this is a type '#' mount point, use
912 * the read-only, otherwise use the one specified.
914 if (mtType == '#' && (scp->flags & CM_SCACHEFLAG_PURERO)
915 && volp->roID != 0 && type == RWVOL)
918 scp->mountRootFidp->volume = volp->roID;
919 else if (type == BACKVOL)
920 scp->mountRootFidp->volume = volp->bkID;
922 scp->mountRootFidp->volume = volp->rwID;
924 /* the rest of the fid is a magic number */
925 scp->mountRootFidp->vnode = 1;
926 scp->mountRootFidp->unique = 1;
927 scp->mountRootGen = cm_mountRootGen;
929 tfid = *scp->mountRootFidp;
930 lock_ReleaseMutex(&scp->mx);
931 code = cm_GetSCache(&tfid, outScpp, userp, reqp);
932 lock_ObtainMutex(&scp->mx);
941 int cm_ExpandSysName(char *inp, char *outp, long outSize)
946 tp = strrchr(inp, '@');
947 if (tp == NULL) return 0; /* no @sys */
949 if (strcmp(tp, "@sys") != 0) return 0; /* no @sys */
951 /* caller just wants to know if this is a valid @sys type of name */
952 if (outp == NULL) return 1;
954 /* otherwise generate the properly expanded @sys name */
955 prefixCount = tp - inp;
957 strncpy(outp, inp, prefixCount); /* copy out "a." from "a.@sys" */
958 outp[prefixCount] = 0; /* null terminate the "a." */
959 strcat(outp, cm_sysName); /* append i386_nt40 */
963 long cm_Lookup(cm_scache_t *dscp, char *namep, long flags, cm_user_t *userp,
964 cm_req_t *reqp, cm_scache_t **outpScpp)
967 int dnlcHit = 1; /* did we hit in the dnlc? yes, we did */
968 cm_scache_t *tscp = NULL;
969 cm_scache_t *mountedScp;
970 cm_lookupSearch_t rock;
974 if (dscp->fid.vnode == 1 && dscp->fid.unique == 1
975 && strcmp(namep, "..") == 0) {
976 if (dscp->dotdotFidp == (cm_fid_t *)NULL
977 || dscp->dotdotFidp->volume == 0)
978 return CM_ERROR_NOSUCHVOLUME;
979 rock.fid = *dscp->dotdotFidp;
983 if (cm_ExpandSysName(namep, tname, sizeof(tname))) {
986 memset(&rock, 0, sizeof(rock));
987 rock.fid.cell = dscp->fid.cell;
988 rock.fid.volume = dscp->fid.volume;
989 rock.searchNamep = namep;
990 rock.caseFold = (flags & CM_FLAG_CASEFOLD);
991 rock.hasTilde = ((strchr(namep, '~') != NULL) ? 1 : 0);
993 /* If NOMOUNTCHASE, bypass DNLC by passing NULL scp pointer */
994 code = cm_ApplyDir(dscp, cm_LookupSearchProc, &rock, NULL, userp, reqp,
995 (flags & CM_FLAG_NOMOUNTCHASE) ? NULL : &tscp);
997 /* code == 0 means we fell off the end of the dir, while stopnow means
998 * that we stopped early, probably because we found the entry we're
999 * looking for. Any other non-zero code is an error.
1001 if (code && code != CM_ERROR_STOPNOW)
1004 getroot = (dscp==cm_rootSCachep) ;
1006 if (!cm_freelanceEnabled || !getroot) {
1007 if (flags & CM_FLAG_CHECKPATH)
1008 return CM_ERROR_NOSUCHPATH;
1010 return CM_ERROR_NOSUCHFILE;
1012 else { /* nonexistent dir on freelance root, so add it */
1013 osi_Log1(afsd_logp,"cm_Lookup adding mount for non-existent directory: %s",
1014 osi_LogSaveString(afsd_logp,namep));
1015 code = cm_FreelanceAddMount(namep, namep, "root.cell.", namep[0] == '.', &rock.fid);
1016 if (code < 0) { /* add mount point failed, so give up */
1017 if (flags & CM_FLAG_CHECKPATH)
1018 return CM_ERROR_NOSUCHPATH;
1020 return CM_ERROR_NOSUCHFILE;
1022 tscp = NULL; /* to force call of cm_GetSCache */
1027 if ( !tscp ) /* we did not find it in the dnlc */
1030 code = cm_GetSCache(&rock.fid, &tscp, userp, reqp);
1034 /* tscp is now held */
1036 lock_ObtainMutex(&tscp->mx);
1037 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
1038 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
1040 lock_ReleaseMutex(&tscp->mx);
1041 cm_ReleaseSCache(tscp);
1044 /* tscp is now locked */
1046 if (!(flags & CM_FLAG_NOMOUNTCHASE)
1047 && tscp->fileType == CM_SCACHETYPE_MOUNTPOINT) {
1048 /* mount points are funny: they have a volume name to mount
1051 code = cm_ReadMountPoint(tscp, userp, reqp);
1053 code = cm_FollowMountPoint(tscp, dscp, userp, reqp,
1055 lock_ReleaseMutex(&tscp->mx);
1056 cm_ReleaseSCache(tscp);
1063 lock_ReleaseMutex(&tscp->mx);
1066 /* copy back pointer */
1069 /* insert scache in dnlc */
1070 if ( !dnlcHit && !(flags & CM_FLAG_NOMOUNTCHASE) && rock.ExactFound ) {
1071 /* lock the directory entry to prevent racing callback revokes */
1072 lock_ObtainMutex(&dscp->mx);
1073 if ( dscp->cbServerp && dscp->cbExpires )
1074 cm_dnlcEnter(dscp, namep, tscp);
1075 lock_ReleaseMutex(&dscp->mx);
1082 long cm_Unlink(cm_scache_t *dscp, char *namep, cm_user_t *userp, cm_req_t *reqp)
1088 AFSFetchStatus newDirStatus;
1091 #ifdef AFS_FREELANCE_CLIENT
1092 if (cm_freelanceEnabled && dscp == cm_rootSCachep) {
1093 /* deleting a mount point from the root dir. */
1094 code = cm_FreelanceRemoveMount(namep);
1099 /* make sure we don't screw up the dir status during the merge */
1100 lock_ObtainMutex(&dscp->mx);
1101 sflags = CM_SCACHESYNC_STOREDATA;
1102 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, sflags);
1103 lock_ReleaseMutex(&dscp->mx);
1104 if (code) return code;
1107 afsFid.Volume = dscp->fid.volume;
1108 afsFid.Vnode = dscp->fid.vnode;
1109 afsFid.Unique = dscp->fid.unique;
1111 code = cm_Conn(&dscp->fid, userp, reqp, &connp);
1114 code = RXAFS_RemoveFile(connp->callp, &afsFid, namep,
1115 &newDirStatus, &volSync);
1117 } while (cm_Analyze(connp, userp, reqp, &dscp->fid, &volSync, NULL, NULL, code));
1118 code = cm_MapRPCError(code, reqp);
1120 lock_ObtainMutex(&dscp->mx);
1121 cm_dnlcRemove(dscp, namep);
1122 cm_SyncOpDone(dscp, NULL, sflags);
1123 if (code == 0) cm_MergeStatus(dscp, &newDirStatus, &volSync, userp, 0);
1124 lock_ReleaseMutex(&dscp->mx);
1129 /* called with a locked vnode, and fills in the link info.
1130 * returns this the vnode still locked.
1132 long cm_HandleLink(cm_scache_t *linkScp, cm_user_t *userp, cm_req_t *reqp)
1139 lock_AssertMutex(&linkScp->mx);
1140 if (!linkScp->mountPointStringp) {
1141 /* read the link data */
1142 lock_ReleaseMutex(&linkScp->mx);
1143 thyper.LowPart = thyper.HighPart = 0;
1144 code = buf_Get(linkScp, &thyper, &bufp);
1145 lock_ObtainMutex(&linkScp->mx);
1146 if (code) return code;
1148 code = cm_SyncOp(linkScp, bufp, userp, reqp, 0,
1149 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ);
1154 if (cm_HaveBuffer(linkScp, bufp, 0)) break;
1156 code = cm_GetBuffer(linkScp, bufp, NULL, userp, reqp);
1161 } /* while loop to get the data */
1163 /* now if we still have no link read in,
1164 * copy the data from the buffer */
1165 if ((temp = linkScp->length.LowPart) >= 1024) {
1167 return CM_ERROR_TOOBIG;
1170 /* otherwise, it fits; make sure it is still null (could have
1171 * lost race with someone else referencing this link above),
1172 * and if so, copy in the data.
1174 if (linkScp->mountPointStringp == NULL) {
1175 linkScp->mountPointStringp = malloc(temp+1);
1176 strncpy(linkScp->mountPointStringp, bufp->datap, temp);
1177 linkScp->mountPointStringp[temp] = 0; /* null terminate */
1180 } /* don't have sym link contents cached */
1185 /* called with a held vnode and a path suffix, with the held vnode being a
1186 * symbolic link. Our goal is to generate a new path to interpret, and return
1187 * this new path in newSpaceBufferp. If the new vnode is relative to a dir
1188 * other than the directory containing the symbolic link, then the new root is
1189 * returned in *newRootScpp, otherwise a null is returned there.
1191 long cm_AssembleLink(cm_scache_t *linkScp, char *pathSuffixp,
1192 cm_scache_t **newRootScpp, cm_space_t **newSpaceBufferp,
1193 cm_user_t *userp, cm_req_t *reqp)
1199 lock_ObtainMutex(&linkScp->mx);
1200 code = cm_HandleLink(linkScp, userp, reqp);
1201 if (code) goto done;
1203 /* if we may overflow the buffer, bail out; buffer is signficantly
1204 * bigger than max path length, so we don't really have to worry about
1205 * being a little conservative here.
1207 if (strlen(linkScp->mountPointStringp) + strlen(pathSuffixp) + 2
1208 >= CM_UTILS_SPACESIZE)
1209 return CM_ERROR_TOOBIG;
1211 tsp = cm_GetSpace();
1212 linkp = linkScp->mountPointStringp;
1213 if (strncmp(linkp, cm_mountRoot, cm_mountRootLen) == 0) {
1214 if (strlen(linkp) > cm_mountRootLen)
1215 strcpy(tsp->data, linkp+cm_mountRootLen+1);
1218 *newRootScpp = cm_rootSCachep;
1219 cm_HoldSCache(cm_rootSCachep);
1220 } else if (*linkp == '\\' || *linkp == '/') {
1221 /* formerly, this was considered to be from the AFS root,
1222 but this seems to create problems. instead, we will just
1225 strcpy(tsp->data, linkp+1);
1226 *newRootScpp = cm_rootSCachep;
1227 cm_HoldSCache(cm_rootSCachep);
1229 code = CM_ERROR_NOSUCHPATH;
1234 /* a relative link */
1235 strcpy(tsp->data, linkp);
1236 *newRootScpp = NULL;
1238 if (pathSuffixp[0] != 0) { /* if suffix string is non-null */
1239 strcat(tsp->data, "\\");
1240 strcat(tsp->data, pathSuffixp);
1242 *newSpaceBufferp = tsp;
1246 lock_ReleaseMutex(&linkScp->mx);
1250 long cm_NameI(cm_scache_t *rootSCachep, char *pathp, long flags,
1251 cm_user_t *userp, char *tidPathp, cm_req_t *reqp, cm_scache_t **outScpp)
1254 char *tp; /* ptr moving through input buffer */
1255 char tc; /* temp char */
1256 int haveComponent; /* has new component started? */
1257 char component[256]; /* this is the new component */
1258 char *cp; /* component name being assembled */
1259 cm_scache_t *tscp; /* current location in the hierarchy */
1260 cm_scache_t *nscp; /* next dude down */
1261 cm_scache_t *dirScp; /* last dir we searched */
1262 cm_scache_t *linkScp; /* new root for the symlink we just
1264 cm_space_t *psp; /* space for current path, if we've hit
1266 cm_space_t *tempsp; /* temp vbl */
1267 char *restp; /* rest of the pathname to interpret */
1268 int symlinkCount; /* count of # of symlinks traversed */
1269 int extraFlag; /* avoid chasing mt pts for dir cmd */
1270 int phase = 1; /* 1 = tidPathp, 2 = pathp */
1283 cm_HoldSCache(tscp);
1288 /* map Unix slashes into DOS ones so we can interpret Unix
1291 if (tc == '/') tc = '\\';
1293 if (!haveComponent) {
1294 if (tc == '\\') continue;
1311 /* we have a component here */
1312 if (tc == 0 || tc == '\\') {
1313 /* end of the component; we're at the last
1314 * component if tc == 0. However, if the last
1315 * is a symlink, we have more to do.
1317 *cp++ = 0; /* add null termination */
1319 if ((flags & CM_FLAG_DIRSEARCH) && tc == 0)
1320 extraFlag = CM_FLAG_NOMOUNTCHASE;
1321 code = cm_Lookup(tscp, component,
1323 userp, reqp, &nscp);
1326 cm_ReleaseSCache(tscp);
1327 if (psp) cm_FreeSpace(psp);
1330 haveComponent = 0; /* component done */
1331 dirScp = tscp; /* for some symlinks */
1332 tscp = nscp; /* already held */
1333 if (tc == 0 && !(flags & CM_FLAG_FOLLOW) && phase == 2) {
1335 cm_ReleaseSCache(dirScp);
1339 /* now, if tscp is a symlink, we should follow
1340 * it and assemble the path again.
1342 lock_ObtainMutex(&tscp->mx);
1343 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
1344 CM_SCACHESYNC_GETSTATUS
1345 | CM_SCACHESYNC_NEEDCALLBACK);
1347 lock_ReleaseMutex(&tscp->mx);
1348 cm_ReleaseSCache(tscp);
1349 cm_ReleaseSCache(dirScp);
1352 if (tscp->fileType == CM_SCACHETYPE_SYMLINK) {
1353 /* this is a symlink; assemble a new buffer */
1354 lock_ReleaseMutex(&tscp->mx);
1355 if (symlinkCount++ >= 16) {
1356 cm_ReleaseSCache(tscp);
1357 cm_ReleaseSCache(dirScp);
1358 if (psp) cm_FreeSpace(psp);
1359 return CM_ERROR_TOOBIG;
1361 if (tc == 0) restp = "";
1363 code = cm_AssembleLink(tscp, restp, &linkScp, &tempsp, userp, reqp);
1365 /* something went wrong */
1366 cm_ReleaseSCache(tscp);
1367 cm_ReleaseSCache(dirScp);
1371 /* otherwise, tempsp has the new path,
1372 * and linkScp is the new root from
1373 * which to interpret that path.
1374 * Continue with the namei processing,
1375 * also doing the bookkeeping for the
1376 * space allocation and tracking the
1377 * vnode reference counts.
1379 if (psp) cm_FreeSpace(psp);
1382 cm_ReleaseSCache(tscp);
1383 tscp = linkScp; /* already held
1384 * by AssembleLink */
1385 /* now, if linkScp is null, that's
1386 * AssembleLink's way of telling us that
1387 * the sym link is relative to the dir
1388 * containing the link. We have a ref
1389 * to it in dirScp, and we hold it now
1390 * and reuse it as the new spot in the
1394 cm_HoldSCache(dirScp);
1397 } /* if we have a sym link */
1399 /* not a symlink, we may be done */
1400 lock_ReleaseMutex(&tscp->mx);
1407 cm_ReleaseSCache(dirScp);
1412 cm_ReleaseSCache(dirScp);
1413 } /* end of a component */
1415 } /* we have a component */
1416 } /* big while loop over all components */
1419 if (psp) cm_FreeSpace(psp);
1420 if (code == 0) *outScpp = tscp;
1424 /* called with a dir, and a vnode within the dir that happens to be a symlink.
1425 * We chase the link, and return a held pointer to the target, if it exists,
1426 * in *outScpp. If we succeed, we return 0, otherwise we return an error code
1427 * and do not hold or return a target vnode.
1429 * This is very similar to calling cm_NameI with the last component of a name,
1430 * which happens to be a symlink, except that we've already passed by the name.
1432 * This function is typically called by the directory listing functions, which
1433 * encounter symlinks but need to return the proper file length so programs
1434 * like "more" work properly when they make use of the attributes retrieved from
1437 * The input vnode should not be locked when this function is called.
1439 long cm_EvaluateSymLink(cm_scache_t *dscp, cm_scache_t *linkScp,
1440 cm_scache_t **outScpp, cm_user_t *userp, cm_req_t *reqp)
1444 cm_scache_t *newRootScp;
1446 osi_Log1(afsd_logp, "Evaluating symlink vp %x", linkScp);
1448 code = cm_AssembleLink(linkScp, "", &newRootScp, &spacep, userp, reqp);
1449 if (code) return code;
1451 /* now, if newRootScp is NULL, we're really being told that the symlink
1452 * is relative to the current directory (dscp).
1454 if (newRootScp == NULL) {
1456 cm_HoldSCache(dscp);
1459 code = cm_NameI(newRootScp, spacep->data,
1460 CM_FLAG_CASEFOLD | CM_FLAG_FOLLOW | CM_FLAG_DIRSEARCH,
1461 userp, NULL, reqp, outScpp);
1463 /* this stuff is allocated no matter what happened on the namei call,
1465 cm_FreeSpace(spacep);
1466 cm_ReleaseSCache(newRootScp);
1471 /* make this big enough so that one buffer of dir pages won't overflow. We'll
1472 * check anyway, but we want to minimize the chance that we have to leave stuff
1475 #define CM_BULKMAX 128
1477 /* rock for bulk stat calls */
1478 typedef struct cm_bulkStat {
1479 osi_hyper_t bufOffset; /* only do it for things in this buffer page */
1481 /* info for the actual call */
1482 int counter; /* next free slot */
1483 AFSFid fids[CM_BULKMAX];
1484 AFSFetchStatus stats[CM_BULKMAX];
1485 AFSCallBack callbacks[CM_BULKMAX];
1488 /* for a given entry, make sure that it isn't in the stat cache, and then
1489 * add it to the list of file IDs to be obtained.
1491 * Don't bother adding it if we already have a vnode. Note that the dir
1492 * is locked, so we have to be careful checking the vnode we're thinking of
1493 * processing, to avoid deadlocks.
1495 long cm_TryBulkProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
1506 /* Don't overflow bsp. */
1507 if (bsp->counter >= CM_BULKMAX)
1508 return CM_ERROR_STOPNOW;
1510 thyper.LowPart = buf_bufferSize;
1511 thyper.HighPart = 0;
1512 thyper = LargeIntegerAdd(thyper, bsp->bufOffset);
1514 /* thyper is now the first byte past the end of the record we're
1515 * interested in, and bsp->bufOffset is the first byte of the record
1516 * we're interested in.
1517 * Skip data in the others.
1520 if (LargeIntegerLessThan(*offp, bsp->bufOffset))
1522 if (LargeIntegerGreaterThanOrEqualTo(*offp, thyper))
1523 return CM_ERROR_STOPNOW;
1524 if (strcmp(dep->name, ".") == 0 || strcmp(dep->name, "..") == 0)
1527 tfid.cell = scp->fid.cell;
1528 tfid.volume = scp->fid.volume;
1529 tfid.vnode = ntohl(dep->fid.vnode);
1530 tfid.unique = ntohl(dep->fid.unique);
1531 tscp = cm_FindSCache(&tfid);
1533 if (lock_TryMutex(&tscp->mx)) {
1534 /* we have an entry that we can look at */
1535 if (cm_HaveCallback(tscp)) {
1536 /* we have a callback on it. Don't bother
1537 * fetching this stat entry, since we're happy
1538 * with the info we have.
1540 lock_ReleaseMutex(&tscp->mx);
1541 cm_ReleaseSCache(tscp);
1544 lock_ReleaseMutex(&tscp->mx);
1546 cm_ReleaseSCache(tscp);
1549 #ifdef AFS_FREELANCE_CLIENT
1550 // yj: if this is a mountpoint under root.afs then we don't want it
1551 // to be bulkstat-ed, instead, we call getSCache directly and under
1552 // getSCache, it is handled specially.
1553 if ( cm_freelanceEnabled &&
1554 tfid.cell==AFS_FAKE_ROOT_CELL_ID &&
1555 tfid.volume==AFS_FAKE_ROOT_VOL_ID &&
1556 !(tfid.vnode==0x1 && tfid.unique==0x1) )
1558 osi_Log0(afsd_logp, "cm_TryBulkProc Freelance calls cm_SCache on root.afs mountpoint");
1559 return cm_GetSCache(&tfid, &tscp, NULL, NULL);
1561 #endif /* AFS_FREELANCE_CLIENT */
1564 bsp->fids[i].Volume = scp->fid.volume;
1565 bsp->fids[i].Vnode = tfid.vnode;
1566 bsp->fids[i].Unique = tfid.unique;
1570 /* called with a locked scp and a pointer to a buffer. Make bulk stat
1571 * calls on all undeleted files in the page of the directory specified.
1573 void cm_TryBulkStat(cm_scache_t *dscp, osi_hyper_t *offsetp, cm_user_t *userp,
1577 cm_bulkStat_t bb; /* this is *BIG*, probably 12K or so;
1578 * watch for stack problems */
1579 AFSCBFids fidStruct;
1580 AFSBulkStats statStruct;
1582 AFSCBs callbackStruct;
1585 cm_callbackRequest_t cbReq;
1592 osi_Log1(afsd_logp, "cm_TryBulkStat dir 0x%x", (long) dscp);
1594 /* should be on a buffer boundary */
1595 osi_assert((offsetp->LowPart & (buf_bufferSize - 1)) == 0);
1598 bb.bufOffset = *offsetp;
1600 /* first, assemble the file IDs we need to stat */
1601 code = cm_ApplyDir(dscp, cm_TryBulkProc, (void *) &bb, offsetp, userp,
1604 /* if we failed, bail out early */
1605 if (code && code != CM_ERROR_STOPNOW) return;
1607 /* otherwise, we may have one or more bulk stat's worth of stuff in bb;
1608 * make the calls to create the entries. Handle AFSCBMAX files at a
1612 while(filex < bb.counter) {
1613 filesThisCall = bb.counter - filex;
1614 if (filesThisCall > AFSCBMAX) filesThisCall = AFSCBMAX;
1616 fidStruct.AFSCBFids_len = filesThisCall;
1617 fidStruct.AFSCBFids_val = &bb.fids[filex];
1618 statStruct.AFSBulkStats_len = filesThisCall;
1619 statStruct.AFSBulkStats_val = &bb.stats[filex];
1620 callbackStruct.AFSCBs_len = filesThisCall;
1621 callbackStruct.AFSCBs_val = &bb.callbacks[filex];
1622 cm_StartCallbackGrantingCall(NULL, &cbReq);
1623 osi_Log1(afsd_logp, "CALL BulkStatus, %d entries", filesThisCall);
1625 code = cm_Conn(&dscp->fid, userp, reqp, &connp);
1628 code = RXAFS_BulkStatus(connp->callp, &fidStruct,
1629 &statStruct, &callbackStruct, &volSync);
1631 } while (cm_Analyze(connp, userp, reqp, &dscp->fid,
1632 &volSync, NULL, &cbReq, code));
1633 code = cm_MapRPCError(code, reqp);
1635 osi_Log0(afsd_logp, "CALL BulkStatus DONE");
1637 /* may as well quit on an error, since we're not going to do
1638 * much better on the next immediate call, either.
1642 /* otherwise, we should do the merges */
1643 for(i = 0; i<filesThisCall; i++) {
1645 tfid.cell = dscp->fid.cell;
1646 tfid.volume = bb.fids[j].Volume;
1647 tfid.vnode = bb.fids[j].Vnode;
1648 tfid.unique = bb.fids[j].Unique;
1649 code = cm_GetSCache(&tfid, &scp, userp, reqp);
1650 if (code != 0) continue;
1652 /* otherwise, if this entry has no callback info,
1655 lock_ObtainMutex(&scp->mx);
1656 /* now, we have to be extra paranoid on merging in this
1657 * information, since we didn't use cm_SyncOp before
1658 * starting the fetch to make sure that no bad races
1659 * were occurring. Specifically, we need to make sure
1660 * we don't obliterate any newer information in the
1661 * vnode than have here.
1663 * Right now, be pretty conservative: if there's a
1664 * callback or a pending call, skip it.
1666 if (scp->cbServerp == NULL
1668 (CM_SCACHEFLAG_FETCHING
1669 | CM_SCACHEFLAG_STORING
1670 | CM_SCACHEFLAG_SIZESTORING))) {
1671 cm_EndCallbackGrantingCall(scp, &cbReq,
1673 CM_CALLBACK_MAINTAINCOUNT);
1674 cm_MergeStatus(scp, &bb.stats[j], &volSync,
1677 lock_ReleaseMutex(&scp->mx);
1678 cm_ReleaseSCache(scp);
1679 } /* all files in the response */
1680 /* now tell it to drop the count,
1681 * after doing the vnode processing above */
1682 cm_EndCallbackGrantingCall(NULL, NULL, NULL, 0);
1684 filex += filesThisCall;
1685 } /* while there are still more files to process */
1686 osi_Log0(afsd_logp, "END cm_TryBulkStat");
1689 void cm_StatusFromAttr(AFSStoreStatus *statusp, cm_scache_t *scp, cm_attr_t *attrp)
1693 /* initialize store back mask as inexpensive local variable */
1695 memset(statusp, 0, sizeof(AFSStoreStatus));
1697 /* copy out queued info from scache first, if scp passed in */
1699 if (scp->mask & CM_SCACHEMASK_CLIENTMODTIME) {
1700 statusp->ClientModTime = scp->clientModTime;
1701 mask |= AFS_SETMODTIME;
1702 scp->mask &= ~CM_SCACHEMASK_CLIENTMODTIME;
1707 /* now add in our locally generated request */
1708 if (attrp->mask & CM_ATTRMASK_CLIENTMODTIME) {
1709 statusp->ClientModTime = attrp->clientModTime;
1710 mask |= AFS_SETMODTIME;
1712 if (attrp->mask & CM_ATTRMASK_UNIXMODEBITS) {
1713 statusp->UnixModeBits = attrp->unixModeBits;
1714 mask |= AFS_SETMODE;
1716 if (attrp->mask & CM_ATTRMASK_OWNER) {
1717 statusp->Owner = attrp->owner;
1718 mask |= AFS_SETOWNER;
1720 if (attrp->mask & CM_ATTRMASK_GROUP) {
1721 statusp->Group = attrp->group;
1722 mask |= AFS_SETGROUP;
1725 statusp->Mask = mask;
1728 /* set the file size, and make sure that all relevant buffers have been
1729 * truncated. Ensure that any partially truncated buffers have been zeroed
1730 * to the end of the buffer.
1732 long cm_SetLength(cm_scache_t *scp, osi_hyper_t *sizep, cm_user_t *userp,
1738 /* start by locking out buffer creation */
1739 lock_ObtainWrite(&scp->bufCreateLock);
1741 /* verify that this is a file, not a dir or a symlink */
1742 lock_ObtainMutex(&scp->mx);
1743 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
1744 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
1745 if (code) goto done;
1747 if (scp->fileType != CM_SCACHETYPE_FILE) {
1748 code = CM_ERROR_ISDIR;
1753 if (LargeIntegerLessThan(*sizep, scp->length))
1758 lock_ReleaseMutex(&scp->mx);
1760 /* can't hold scp->mx lock here, since we may wait for a storeback to
1761 * finish if the buffer package is cleaning a buffer by storing it to
1765 buf_Truncate(scp, userp, reqp, sizep);
1767 /* now ensure that file length is short enough, and update truncPos */
1768 lock_ObtainMutex(&scp->mx);
1770 /* make sure we have a callback (so we have the right value for the
1771 * length), and wait for it to be safe to do a truncate.
1773 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_WRITE,
1774 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS
1775 | CM_SCACHESYNC_SETSTATUS | CM_SCACHESYNC_SETSIZE);
1776 if (code) goto done;
1778 if (LargeIntegerLessThan(*sizep, scp->length)) {
1779 /* a real truncation. If truncPos is not set yet, or is bigger
1780 * than where we're truncating the file, set truncPos to this
1785 if (!(scp->mask & CM_SCACHEMASK_TRUNCPOS)
1786 || LargeIntegerLessThan(*sizep, scp->length)) {
1788 scp->truncPos = *sizep;
1789 scp->mask |= CM_SCACHEMASK_TRUNCPOS;
1791 /* in either case, the new file size has been changed */
1792 scp->length = *sizep;
1793 scp->mask |= CM_SCACHEMASK_LENGTH;
1795 else if (LargeIntegerGreaterThan(*sizep, scp->length)) {
1796 /* really extending the file */
1797 scp->length = *sizep;
1798 scp->mask |= CM_SCACHEMASK_LENGTH;
1801 /* done successfully */
1805 lock_ReleaseMutex(&scp->mx);
1806 lock_ReleaseWrite(&scp->bufCreateLock);
1811 /* set the file size or other attributes (but not both at once) */
1812 long cm_SetAttr(cm_scache_t *scp, cm_attr_t *attrp, cm_user_t *userp,
1817 AFSFetchStatus afsOutStatus;
1821 AFSStoreStatus afsInStatus;
1823 /* handle file length setting */
1824 if (attrp->mask & CM_ATTRMASK_LENGTH)
1825 return cm_SetLength(scp, &attrp->length, userp, reqp);
1827 flags = CM_SCACHESYNC_STORESTATUS;
1829 lock_ObtainMutex(&scp->mx);
1830 /* otherwise, we have to make an RPC to get the status */
1831 code = cm_SyncOp(scp, NULL, userp, reqp, 0, CM_SCACHESYNC_STORESTATUS);
1833 /* make the attr structure */
1834 cm_StatusFromAttr(&afsInStatus, scp, attrp);
1836 lock_ReleaseMutex(&scp->mx);
1837 if (code) return code;
1839 /* now make the RPC */
1840 osi_Log1(afsd_logp, "CALL StoreStatus vp %x", (long) scp);
1841 tfid.Volume = scp->fid.volume;
1842 tfid.Vnode = scp->fid.vnode;
1843 tfid.Unique = scp->fid.unique;
1845 code = cm_Conn(&scp->fid, userp, reqp, &connp);
1848 code = RXAFS_StoreStatus(connp->callp, &tfid,
1849 &afsInStatus, &afsOutStatus, &volSync);
1851 } while (cm_Analyze(connp, userp, reqp,
1852 &scp->fid, &volSync, NULL, NULL, code));
1853 code = cm_MapRPCError(code, reqp);
1855 osi_Log1(afsd_logp, "CALL StoreStatus DONE, code %d", code);
1857 lock_ObtainMutex(&scp->mx);
1858 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_STORESTATUS);
1860 cm_MergeStatus(scp, &afsOutStatus, &volSync, userp,
1861 CM_MERGEFLAG_FORCE);
1863 /* if we're changing the mode bits, discard the ACL cache,
1864 * since we changed the mode bits.
1866 if (afsInStatus.Mask & AFS_SETMODE) cm_FreeAllACLEnts(scp);
1867 lock_ReleaseMutex(&scp->mx);
1871 long cm_Create(cm_scache_t *dscp, char *namep, long flags, cm_attr_t *attrp,
1872 cm_scache_t **scpp, cm_user_t *userp, cm_req_t *reqp)
1877 cm_callbackRequest_t cbReq;
1882 AFSStoreStatus inStatus;
1883 AFSFetchStatus updatedDirStatus;
1884 AFSFetchStatus newFileStatus;
1885 AFSCallBack newFileCallback;
1888 /* can't create names with @sys in them; must expand it manually first.
1889 * return "invalid request" if they try.
1891 if (cm_ExpandSysName(namep, NULL, 0)) {
1892 return CM_ERROR_ATSYS;
1895 /* before starting the RPC, mark that we're changing the file data, so
1896 * that someone who does a chmod will know to wait until our call
1899 lock_ObtainMutex(&dscp->mx);
1900 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
1902 cm_StartCallbackGrantingCall(NULL, &cbReq);
1904 lock_ReleaseMutex(&dscp->mx);
1910 cm_StatusFromAttr(&inStatus, NULL, attrp);
1912 /* try the RPC now */
1914 code = cm_Conn(&dscp->fid, userp, reqp, &connp);
1917 dirAFSFid.Volume = dscp->fid.volume;
1918 dirAFSFid.Vnode = dscp->fid.vnode;
1919 dirAFSFid.Unique = dscp->fid.unique;
1920 code = RXAFS_CreateFile(connp->callp, &dirAFSFid, namep,
1921 &inStatus, &newAFSFid, &newFileStatus,
1922 &updatedDirStatus, &newFileCallback,
1924 } while (cm_Analyze(connp, userp, reqp,
1925 &dscp->fid, &volSync, NULL, &cbReq, code));
1926 code = cm_MapRPCError(code, reqp);
1928 lock_ObtainMutex(&dscp->mx);
1929 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
1931 cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
1933 lock_ReleaseMutex(&dscp->mx);
1935 /* now try to create the file's entry, too, but be careful to
1936 * make sure that we don't merge in old info. Since we weren't locking
1937 * out any requests during the file's creation, we may have pretty old
1941 newFid.cell = dscp->fid.cell;
1942 newFid.volume = dscp->fid.volume;
1943 newFid.vnode = newAFSFid.Vnode;
1944 newFid.unique = newAFSFid.Unique;
1945 code = cm_GetSCache(&newFid, &scp, userp, reqp);
1947 lock_ObtainMutex(&scp->mx);
1948 if (!cm_HaveCallback(scp)) {
1949 cm_MergeStatus(scp, &newFileStatus, &volSync,
1951 cm_EndCallbackGrantingCall(scp, &cbReq,
1952 &newFileCallback, 0);
1955 lock_ReleaseMutex(&scp->mx);
1960 /* make sure we end things properly */
1962 cm_EndCallbackGrantingCall(NULL, NULL, NULL, 0);
1967 long cm_FSync(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp)
1971 lock_ObtainWrite(&scp->bufCreateLock);
1972 code = buf_CleanVnode(scp, userp, reqp);
1973 lock_ReleaseWrite(&scp->bufCreateLock);
1975 lock_ObtainMutex(&scp->mx);
1976 scp->flags &= ~(CM_SCACHEFLAG_OVERQUOTA
1977 | CM_SCACHEFLAG_OUTOFSPACE);
1978 if (scp->mask & (CM_SCACHEMASK_TRUNCPOS
1979 | CM_SCACHEMASK_CLIENTMODTIME
1980 | CM_SCACHEMASK_LENGTH))
1981 code = cm_StoreMini(scp, userp, reqp);
1982 lock_ReleaseMutex(&scp->mx);
1987 long cm_MakeDir(cm_scache_t *dscp, char *namep, long flags, cm_attr_t *attrp,
1988 cm_user_t *userp, cm_req_t *reqp)
1993 cm_callbackRequest_t cbReq;
1998 AFSStoreStatus inStatus;
1999 AFSFetchStatus updatedDirStatus;
2000 AFSFetchStatus newDirStatus;
2001 AFSCallBack newDirCallback;
2004 /* can't create names with @sys in them; must expand it manually first.
2005 * return "invalid request" if they try.
2007 if (cm_ExpandSysName(namep, NULL, 0)) {
2008 return CM_ERROR_ATSYS;
2011 /* before starting the RPC, mark that we're changing the directory
2012 * data, so that someone who does a chmod on the dir will wait until
2013 * our call completes.
2015 lock_ObtainMutex(&dscp->mx);
2016 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
2018 cm_StartCallbackGrantingCall(NULL, &cbReq);
2020 lock_ReleaseMutex(&dscp->mx);
2026 cm_StatusFromAttr(&inStatus, NULL, attrp);
2028 /* try the RPC now */
2030 code = cm_Conn(&dscp->fid, userp, reqp, &connp);
2033 dirAFSFid.Volume = dscp->fid.volume;
2034 dirAFSFid.Vnode = dscp->fid.vnode;
2035 dirAFSFid.Unique = dscp->fid.unique;
2036 code = RXAFS_MakeDir(connp->callp, &dirAFSFid, namep,
2037 &inStatus, &newAFSFid, &newDirStatus,
2038 &updatedDirStatus, &newDirCallback,
2040 } while (cm_Analyze(connp, userp, reqp,
2041 &dscp->fid, &volSync, NULL, &cbReq, code));
2042 code = cm_MapRPCError(code, reqp);
2044 lock_ObtainMutex(&dscp->mx);
2045 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
2047 cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
2049 lock_ReleaseMutex(&dscp->mx);
2051 /* now try to create the new dir's entry, too, but be careful to
2052 * make sure that we don't merge in old info. Since we weren't locking
2053 * out any requests during the file's creation, we may have pretty old
2057 newFid.cell = dscp->fid.cell;
2058 newFid.volume = dscp->fid.volume;
2059 newFid.vnode = newAFSFid.Vnode;
2060 newFid.unique = newAFSFid.Unique;
2061 code = cm_GetSCache(&newFid, &scp, userp, reqp);
2063 lock_ObtainMutex(&scp->mx);
2064 if (!cm_HaveCallback(scp)) {
2065 cm_MergeStatus(scp, &newDirStatus, &volSync,
2067 cm_EndCallbackGrantingCall(scp, &cbReq,
2068 &newDirCallback, 0);
2071 lock_ReleaseMutex(&scp->mx);
2072 cm_ReleaseSCache(scp);
2076 /* make sure we end things properly */
2078 cm_EndCallbackGrantingCall(NULL, NULL, NULL, 0);
2080 /* and return error code */
2084 long cm_SymLink(cm_scache_t *dscp, char *namep, char *contentsp, long flags,
2085 cm_attr_t *attrp, cm_user_t *userp, cm_req_t *reqp)
2093 AFSStoreStatus inStatus;
2094 AFSFetchStatus updatedDirStatus;
2095 AFSFetchStatus newLinkStatus;
2098 /* before starting the RPC, mark that we're changing the directory data,
2099 * so that someone who does a chmod on the dir will wait until our
2102 lock_ObtainMutex(&dscp->mx);
2103 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
2104 lock_ReleaseMutex(&dscp->mx);
2109 cm_StatusFromAttr(&inStatus, NULL, attrp);
2111 /* try the RPC now */
2113 code = cm_Conn(&dscp->fid, userp, reqp, &connp);
2116 dirAFSFid.Volume = dscp->fid.volume;
2117 dirAFSFid.Vnode = dscp->fid.vnode;
2118 dirAFSFid.Unique = dscp->fid.unique;
2119 code = RXAFS_Symlink(connp->callp, &dirAFSFid, namep, contentsp,
2120 &inStatus, &newAFSFid, &newLinkStatus,
2121 &updatedDirStatus, &volSync);
2122 } while (cm_Analyze(connp, userp, reqp,
2123 &dscp->fid, &volSync, NULL, NULL, code));
2124 code = cm_MapRPCError(code, reqp);
2126 lock_ObtainMutex(&dscp->mx);
2127 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
2129 cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
2131 lock_ReleaseMutex(&dscp->mx);
2133 /* now try to create the new dir's entry, too, but be careful to
2134 * make sure that we don't merge in old info. Since we weren't locking
2135 * out any requests during the file's creation, we may have pretty old
2139 newFid.cell = dscp->fid.cell;
2140 newFid.volume = dscp->fid.volume;
2141 newFid.vnode = newAFSFid.Vnode;
2142 newFid.unique = newAFSFid.Unique;
2143 code = cm_GetSCache(&newFid, &scp, userp, reqp);
2145 lock_ObtainMutex(&scp->mx);
2146 if (!cm_HaveCallback(scp)) {
2147 cm_MergeStatus(scp, &newLinkStatus, &volSync,
2150 lock_ReleaseMutex(&scp->mx);
2151 cm_ReleaseSCache(scp);
2155 /* and return error code */
2159 long cm_RemoveDir(cm_scache_t *dscp, char *namep, cm_user_t *userp,
2166 AFSFetchStatus updatedDirStatus;
2169 /* before starting the RPC, mark that we're changing the directory data,
2170 * so that someone who does a chmod on the dir will wait until our
2173 lock_ObtainMutex(&dscp->mx);
2174 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, CM_SCACHESYNC_STOREDATA);
2175 lock_ReleaseMutex(&dscp->mx);
2181 /* try the RPC now */
2183 code = cm_Conn(&dscp->fid, userp, reqp, &connp);
2186 dirAFSFid.Volume = dscp->fid.volume;
2187 dirAFSFid.Vnode = dscp->fid.vnode;
2188 dirAFSFid.Unique = dscp->fid.unique;
2189 code = RXAFS_RemoveDir(connp->callp, &dirAFSFid, namep,
2190 &updatedDirStatus, &volSync);
2191 } while (cm_Analyze(connp, userp, reqp,
2192 &dscp->fid, &volSync, NULL, NULL, code));
2193 code = cm_MapRPCErrorRmdir(code, reqp);
2195 lock_ObtainMutex(&dscp->mx);
2196 cm_dnlcRemove(dscp, namep);
2197 cm_SyncOpDone(dscp, NULL, CM_SCACHESYNC_STOREDATA);
2199 cm_MergeStatus(dscp, &updatedDirStatus, &volSync, userp, 0);
2201 lock_ReleaseMutex(&dscp->mx);
2203 /* and return error code */
2207 long cm_Open(cm_scache_t *scp, int type, cm_user_t *userp)
2209 /* grab mutex on contents */
2210 lock_ObtainMutex(&scp->mx);
2212 /* reset the prefetch info */
2213 scp->prefetch.base.LowPart = 0; /* base */
2214 scp->prefetch.base.HighPart = 0;
2215 scp->prefetch.end.LowPart = 0; /* and end */
2216 scp->prefetch.end.HighPart = 0;
2218 /* release mutex on contents */
2219 lock_ReleaseMutex(&scp->mx);
2225 long cm_Rename(cm_scache_t *oldDscp, char *oldNamep, cm_scache_t *newDscp,
2226 char *newNamep, cm_user_t *userp, cm_req_t *reqp)
2230 AFSFid oldDirAFSFid;
2231 AFSFid newDirAFSFid;
2233 AFSFetchStatus updatedOldDirStatus;
2234 AFSFetchStatus updatedNewDirStatus;
2238 /* before starting the RPC, mark that we're changing the directory data,
2239 * so that someone who does a chmod on the dir will wait until our call
2240 * completes. We do this in vnode order so that we don't deadlock,
2241 * which makes the code a little verbose.
2243 if (oldDscp == newDscp) {
2244 /* check for identical names */
2245 if (strcmp(oldNamep, newNamep) == 0)
2246 return CM_ERROR_RENAME_IDENTICAL;
2249 lock_ObtainMutex(&oldDscp->mx);
2250 cm_dnlcRemove(oldDscp, oldNamep);
2251 cm_dnlcRemove(oldDscp, newNamep);
2252 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
2253 CM_SCACHESYNC_STOREDATA);
2254 lock_ReleaseMutex(&oldDscp->mx);
2257 /* two distinct dir vnodes */
2259 if (oldDscp->fid.cell != newDscp->fid.cell ||
2260 oldDscp->fid.volume != newDscp->fid.volume)
2261 return CM_ERROR_CROSSDEVLINK;
2263 /* shouldn't happen that we have distinct vnodes for two
2264 * different files, but could due to deliberate attack, or
2265 * stale info. Avoid deadlocks and quit now.
2267 if (oldDscp->fid.vnode == newDscp->fid.vnode)
2268 return CM_ERROR_CROSSDEVLINK;
2270 if (oldDscp->fid.vnode < newDscp->fid.vnode) {
2271 lock_ObtainMutex(&oldDscp->mx);
2272 cm_dnlcRemove(oldDscp, oldNamep);
2273 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
2274 CM_SCACHESYNC_STOREDATA);
2275 lock_ReleaseMutex(&oldDscp->mx);
2277 lock_ObtainMutex(&newDscp->mx);
2278 cm_dnlcRemove(newDscp, newNamep);
2279 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
2280 CM_SCACHESYNC_STOREDATA);
2281 lock_ReleaseMutex(&newDscp->mx);
2283 /* cleanup first one */
2284 cm_SyncOpDone(oldDscp, NULL,
2285 CM_SCACHESYNC_STOREDATA);
2290 /* lock the new vnode entry first */
2291 lock_ObtainMutex(&newDscp->mx);
2292 cm_dnlcRemove(newDscp, newNamep);
2293 code = cm_SyncOp(newDscp, NULL, userp, reqp, 0,
2294 CM_SCACHESYNC_STOREDATA);
2295 lock_ReleaseMutex(&newDscp->mx);
2297 lock_ObtainMutex(&oldDscp->mx);
2298 cm_dnlcRemove(oldDscp, oldNamep);
2299 code = cm_SyncOp(oldDscp, NULL, userp, reqp, 0,
2300 CM_SCACHESYNC_STOREDATA);
2301 lock_ReleaseMutex(&oldDscp->mx);
2303 /* cleanup first one */
2304 cm_SyncOpDone(newDscp, NULL,
2305 CM_SCACHESYNC_STOREDATA);
2309 } /* two distinct vnodes */
2316 /* try the RPC now */
2318 code = cm_Conn(&oldDscp->fid, userp, reqp, &connp);
2321 oldDirAFSFid.Volume = oldDscp->fid.volume;
2322 oldDirAFSFid.Vnode = oldDscp->fid.vnode;
2323 oldDirAFSFid.Unique = oldDscp->fid.unique;
2324 newDirAFSFid.Volume = newDscp->fid.volume;
2325 newDirAFSFid.Vnode = newDscp->fid.vnode;
2326 newDirAFSFid.Unique = newDscp->fid.unique;
2327 code = RXAFS_Rename(connp->callp, &oldDirAFSFid, oldNamep,
2328 &newDirAFSFid, newNamep,
2329 &updatedOldDirStatus, &updatedNewDirStatus,
2331 } while (cm_Analyze(connp, userp, reqp, &oldDscp->fid,
2332 &volSync, NULL, NULL, code));
2333 code = cm_MapRPCError(code, reqp);
2335 /* update the individual stat cache entries for the directories */
2336 lock_ObtainMutex(&oldDscp->mx);
2337 cm_SyncOpDone(oldDscp, NULL, CM_SCACHESYNC_STOREDATA);
2339 cm_MergeStatus(oldDscp, &updatedOldDirStatus, &volSync,
2342 lock_ReleaseMutex(&oldDscp->mx);
2344 /* and update it for the new one, too, if necessary */
2346 lock_ObtainMutex(&newDscp->mx);
2347 cm_SyncOpDone(newDscp, NULL, CM_SCACHESYNC_STOREDATA);
2349 cm_MergeStatus(newDscp, &updatedNewDirStatus, &volSync,
2352 lock_ReleaseMutex(&newDscp->mx);
2355 /* and return error code */
2359 long cm_Lock(cm_scache_t *scp, unsigned char LockType,
2360 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
2361 u_long Timeout, cm_user_t *userp, cm_req_t *reqp,
2365 int Which = ((LockType & 0x1) ? LockRead : LockWrite);
2369 cm_file_lock_t *fileLock;
2373 /* Look for a conflict. Also, if we are asking for a shared lock,
2374 * look for another shared lock, so we don't have to do an RPC.
2378 fileLock = (cm_file_lock_t *)
2379 ((char *) q - offsetof(cm_file_lock_t, fileq));
2380 if ((fileLock->flags &
2381 (CM_FILELOCK_FLAG_INVALID | CM_FILELOCK_FLAG_WAITING))
2383 if ((LockType & 0x1) == 0
2384 || (fileLock->LockType & 0x1) == 0)
2385 return CM_ERROR_WOULDBLOCK;
2394 tfid.Volume = scp->fid.volume;
2395 tfid.Vnode = scp->fid.vnode;
2396 tfid.Unique = scp->fid.unique;
2397 lock_ReleaseMutex(&scp->mx);
2399 code = cm_Conn(&scp->fid, userp, reqp, &connp);
2401 code = RXAFS_SetLock(connp->callp, &tfid, Which,
2403 } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync,
2405 lock_ObtainMutex(&scp->mx);
2406 code = cm_MapRPCError(code, reqp);
2409 if (code == 0 || Timeout != 0) {
2410 fileLock = malloc(sizeof(cm_file_lock_t));
2411 fileLock->LockType = LockType;
2413 fileLock->userp = userp;
2414 fileLock->fid = scp->fid;
2415 fileLock->LOffset = LOffset;
2416 fileLock->LLength = LLength;
2417 fileLock->flags = (code == 0 ? 0 : CM_FILELOCK_FLAG_WAITING);
2418 osi_QAdd(&scp->fileLocks, &fileLock->fileq);
2419 lock_ObtainWrite(&cm_scacheLock);
2420 osi_QAdd(&cm_allFileLocks, &fileLock->q);
2421 lock_ReleaseWrite(&cm_scacheLock);
2422 if (code != 0) *lockpp = fileLock;
2427 long cm_Unlock(cm_scache_t *scp, unsigned char LockType,
2428 LARGE_INTEGER LOffset, LARGE_INTEGER LLength,
2429 cm_user_t *userp, cm_req_t *reqp)
2432 int Which = ((LockType & 0x1) ? LockRead : LockWrite);
2436 cm_file_lock_t *fileLock, *ourLock;
2437 osi_queue_t *q, *qq;
2438 int anotherReader = 0;
2442 if (LargeIntegerLessThan(LLength, scp->length))
2445 /* Look for our own lock on the list, so as to remove it.
2446 * Also, determine if we're the last reader; if not, avoid an RPC.
2450 fileLock = (cm_file_lock_t *)
2451 ((char *) q - offsetof(cm_file_lock_t, fileq));
2453 && fileLock->userp == userp
2454 && LargeIntegerEqualTo(fileLock->LOffset, LOffset)
2455 && LargeIntegerEqualTo(fileLock->LLength, LLength)) {
2460 else if (fileLock->LockType & 0x1)
2465 /* ignore byte ranges */
2466 if (smallLock && !found)
2469 /* don't try to unlock other people's locks */
2471 return CM_ERROR_WOULDBLOCK;
2473 /* discard lock record */
2474 osi_QRemove(&scp->fileLocks, qq);
2476 * Don't delete it here; let the daemon delete it, to simplify
2477 * the daemon's traversal of the list.
2479 lock_ObtainWrite(&cm_scacheLock);
2480 ourLock->flags |= CM_FILELOCK_FLAG_INVALID;
2481 cm_ReleaseUser(ourLock->userp);
2482 lock_ReleaseWrite(&cm_scacheLock);
2484 if (!anotherReader) {
2485 tfid.Volume = scp->fid.volume;
2486 tfid.Vnode = scp->fid.vnode;
2487 tfid.Unique = scp->fid.unique;
2488 lock_ReleaseMutex(&scp->mx);
2490 code = cm_Conn(&scp->fid, userp, reqp, &connp);
2493 code = RXAFS_ReleaseLock(connp->callp, &tfid, &volSync);
2494 } while (cm_Analyze(connp, userp, reqp, &scp->fid, &volSync,
2496 code = cm_MapRPCError(code, reqp);
2497 lock_ObtainMutex(&scp->mx);
2503 void cm_CheckLocks()
2505 osi_queue_t *q, *nq;
2506 cm_file_lock_t *fileLock;
2515 lock_ObtainWrite(&cm_scacheLock);
2516 q = cm_allFileLocks;
2518 fileLock = (cm_file_lock_t *) q;
2520 if (fileLock->flags & CM_FILELOCK_FLAG_INVALID) {
2521 osi_QRemove(&cm_allFileLocks, q);
2524 else if (!(fileLock->flags & CM_FILELOCK_FLAG_WAITING)) {
2525 tfid.Volume = fileLock->fid.volume;
2526 tfid.Vnode = fileLock->fid.vnode;
2527 tfid.Unique = fileLock->fid.unique;
2528 lock_ReleaseWrite(&cm_scacheLock);
2530 code = cm_Conn(&fileLock->fid, fileLock->userp,
2533 code = RXAFS_ExtendLock(connp->callp, &tfid,
2535 } while (cm_Analyze(connp, fileLock->userp, &req,
2536 &fileLock->fid, &volSync, NULL, NULL,
2538 code = cm_MapRPCError(code, &req);
2539 lock_ObtainWrite(&cm_scacheLock);
2543 lock_ReleaseWrite(&cm_scacheLock);
2546 long cm_RetryLock(cm_file_lock_t *oldFileLock, int vcp_is_dead)
2549 int Which = ((oldFileLock->LockType & 0x1) ? LockRead : LockWrite);
2554 cm_file_lock_t *fileLock;
2560 code = CM_ERROR_TIMEDOUT;
2566 /* Look for a conflict. Also, if we are asking for a shared lock,
2567 * look for another shared lock, so we don't have to do an RPC.
2569 code = cm_GetSCache(&oldFileLock->fid, &scp, oldFileLock->userp, &req);
2575 fileLock = (cm_file_lock_t *)
2576 ((char *) q - offsetof(cm_file_lock_t, fileq));
2577 if ((fileLock->flags &
2578 (CM_FILELOCK_FLAG_INVALID | CM_FILELOCK_FLAG_WAITING))
2580 if ((oldFileLock->LockType & 0x1) == 0
2581 || (fileLock->LockType & 0x1) == 0) {
2582 cm_ReleaseSCache(scp);
2583 return CM_ERROR_WOULDBLOCK;
2593 tfid.Volume = oldFileLock->fid.volume;
2594 tfid.Vnode = oldFileLock->fid.vnode;
2595 tfid.Unique = oldFileLock->fid.unique;
2597 code = cm_Conn(&oldFileLock->fid, oldFileLock->userp,
2600 code = RXAFS_SetLock(connp->callp, &tfid, Which,
2602 } while (cm_Analyze(connp, oldFileLock->userp, &req,
2603 &oldFileLock->fid, &volSync,
2605 code = cm_MapRPCError(code, &req);
2609 if (code != 0 && code != CM_ERROR_WOULDBLOCK) {
2610 lock_ObtainMutex(&scp->mx);
2611 osi_QRemove(&scp->fileLocks, &oldFileLock->fileq);
2612 lock_ReleaseMutex(&scp->mx);
2614 lock_ObtainWrite(&cm_scacheLock);
2616 oldFileLock->flags = 0;
2617 else if (code != CM_ERROR_WOULDBLOCK) {
2618 oldFileLock->flags |= CM_FILELOCK_FLAG_INVALID;
2619 cm_ReleaseUser(oldFileLock->userp);
2620 oldFileLock->userp = NULL;
2622 lock_ReleaseWrite(&cm_scacheLock);