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;
40 * Case-folding array. This was constructed by inspecting of SMBtrace output.
41 * I do not know anything more about it.
43 unsigned char cm_foldUpper[256] = {
44 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
45 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
46 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
47 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
48 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
49 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
50 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
51 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
52 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
53 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
54 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
55 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
56 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
57 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
58 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
59 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
60 0x80, 0x9a, 0x90, 0x41, 0x8e, 0x41, 0x8f, 0x80,
61 0x45, 0x45, 0x45, 0x49, 0x49, 0x49, 0x8e, 0x8f,
62 0x90, 0x92, 0x92, 0x4f, 0x99, 0x4f, 0x55, 0x55,
63 0x59, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
64 0x41, 0x49, 0x4f, 0x55, 0xa5, 0xa5, 0x56, 0xa7,
65 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
66 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
67 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
68 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
69 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
70 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
71 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
72 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
73 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
74 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
75 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
79 * Case-insensitive string comparison. We used to use stricmp, but it doesn't
80 * know about 8-bit characters (e.g. 129 is lowercase u-umlaut, 154 is
81 * upper-case u-umlaut).
83 int cm_stricmp(const char *str1, const char *str2)
95 c1 = (char) cm_foldUpper[(unsigned char)(*str1++)];
96 c2 = (char) cm_foldUpper[(unsigned char)(*str2++)];
104 /* characters that are legal in an 8.3 name */
106 * We used to have 1's for all characters from 128 to 254. But
107 * the NT client behaves better if we create an 8.3 name for any
108 * name that has a character with the high bit on, and if we
109 * delete those characters from 8.3 names. In particular, see
110 * Sybase defect 10859.
112 char cm_LegalChars[256] = {
113 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
114 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
115 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0,
116 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
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, 0, 0, 0, 1, 1,
119 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
120 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1,
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,
127 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
128 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
131 /* return true iff component is a valid 8.3 name */
132 int cm_Is8Dot3(char *namep)
135 int sawUpper = 0, sawLower = 0;
140 * can't have a leading dot;
141 * special case for . and ..
143 if (namep[0] == '.') {
146 if (namep[1] == '.' && namep[2] == 0)
150 while (tc = *namep++) {
152 /* saw another dot */
153 if (sawDot) return 0; /* second dot */
158 if (cm_LegalChars[tc] == 0)
160 if (tc >= 'A' && tc <= 'Z')
162 else if (tc >= 'a' && tc <= 'z')
165 if (!sawDot && charCount > 8)
166 /* more than 8 chars in name */
168 if (sawDot && charCount > 3)
169 /* more than 3 chars in extension */
173 * Used to check that all characters were the same case.
174 * This doesn't help 16-bit apps, and meanwhile it causes the
175 * MS-DOS Command Prompt to misbehave; see Sybase defect 10709.
177 if (sawUpper && sawLower)
184 * Number unparsing map for generating 8.3 names;
187 char cm_8Dot3Mapping[41] =
188 {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
189 'B', 'C', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S',
190 'T', 'V', 'W', 'X', 'Y', 'Z', '_', '-', '$', '#', '@', '%', '!', '&', 'E', 'O'
192 int cm_8Dot3MapSize = sizeof(cm_8Dot3Mapping);
194 void cm_Gen8Dot3Name(cm_dirEntry_t *dep, char *shortName, char **shortNameEndp)
198 int vnode = ntohl(dep->fid.vnode);
200 int validExtension = 0;
201 char tc, *temp, *name;
203 /* Unparse the file's vnode number to get a "uniquifier" */
205 number[nsize] = cm_8Dot3Mapping[vnode % cm_8Dot3MapSize];
207 vnode /= cm_8Dot3MapSize;
211 * Look for valid extension. There has to be a dot, and
212 * at least one of the characters following has to be legal.
214 lastDot = strrchr(dep->name, '.');
216 temp = lastDot; temp++;
218 if (cm_LegalChars[tc])
224 /* Copy name characters */
226 for (i = 0, name = dep->name;
227 i < (7 - nsize) && name != lastDot; ) {
232 if (!cm_LegalChars[tc])
235 *shortName++ = toupper(tc);
241 /* Copy uniquifier characters */
242 memcpy(shortName, number, nsize);
245 if (validExtension) {
246 /* Copy extension characters */
247 *shortName++ = *lastDot++; /* copy dot */
248 for (i = 0, tc = *lastDot++;
251 if (cm_LegalChars[tc]) {
253 *shortName++ = toupper(tc);
262 *shortNameEndp = shortName;
265 /* return success if we can open this file in this mode */
266 long cm_CheckOpen(cm_scache_t *scp, int openMode, int trunc, cm_user_t *userp,
273 if (openMode != 1) rights |= PRSFS_READ;
274 if (openMode == 1 || openMode == 2 || trunc) rights |= PRSFS_WRITE;
276 lock_ObtainMutex(&scp->mx);
278 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
279 CM_SCACHESYNC_GETSTATUS
280 | CM_SCACHESYNC_NEEDCALLBACK);
281 lock_ReleaseMutex(&scp->mx);
286 /* return success if we can open this file in this mode */
287 long cm_CheckNTOpen(cm_scache_t *scp, unsigned int desiredAccess,
288 unsigned int createDisp, cm_user_t *userp, cm_req_t *reqp)
293 /* Always allow delete; the RPC will tell us if it's OK */
294 if (desiredAccess == DELETE)
299 if (desiredAccess & AFS_ACCESS_READ)
300 rights |= PRSFS_READ;
302 if ((desiredAccess & AFS_ACCESS_WRITE)
304 rights |= PRSFS_WRITE;
306 lock_ObtainMutex(&scp->mx);
308 code = cm_SyncOp(scp, NULL, userp, reqp, rights,
309 CM_SCACHESYNC_GETSTATUS
310 | CM_SCACHESYNC_NEEDCALLBACK);
311 lock_ReleaseMutex(&scp->mx);
314 * If the open will fail because the volume is readonly, then we will
315 * return an access denied error instead. This is to help brain-dead
316 * apps run correctly on replicated volumes.
317 * See defect 10007 for more information.
319 if (code == CM_ERROR_READONLY)
320 code = CM_ERROR_NOACCESS;
326 * When CAP_NT_SMBS has been negotiated, deletion (of files or directories) is
327 * done in three steps:
328 * (1) open for deletion (NT_CREATE_AND_X)
329 * (2) set for deletion on close (NTWTRANSACTION2, SET_FILE_INFO)
331 * We must not do the RPC until step 3. But if we are going to return an error
332 * code (e.g. directory not empty), we must return it by step 2, otherwise most
333 * clients will not notice it. So we do a preliminary check. For deleting
334 * files, this is almost free, since we have already done the RPC to get the
335 * parent directory's status bits. But for deleting directories, we must do an
336 * additional RPC to get the directory's data to check if it is empty. Sigh.
338 long cm_CheckNTDelete(cm_scache_t *dscp, cm_scache_t *scp, cm_user_t *userp,
345 unsigned short *hashTable;
347 int BeyondPage = 0, HaveDot = 0, HaveDotDot = 0;
349 /* First check permissions */
350 lock_ObtainMutex(&dscp->mx);
351 code = cm_SyncOp(dscp, NULL, userp, reqp, PRSFS_DELETE,
352 CM_SCACHESYNC_GETSTATUS
353 | CM_SCACHESYNC_NEEDCALLBACK);
354 lock_ReleaseMutex(&dscp->mx);
358 /* If deleting directory, must be empty */
360 if (scp->fileType != CM_SCACHETYPE_DIRECTORY)
363 thyper.HighPart = 0; thyper.LowPart = 0;
364 lock_ObtainRead(&scp->bufCreateLock);
365 code = buf_Get(scp, &thyper, &bufferp);
366 lock_ReleaseRead(&scp->bufCreateLock);
370 lock_ObtainMutex(&bufferp->mx);
371 lock_ObtainMutex(&scp->mx);
373 code = cm_SyncOp(scp, bufferp, userp, reqp, 0,
374 CM_SCACHESYNC_NEEDCALLBACK
376 | CM_SCACHESYNC_BUFLOCKED);
380 if (cm_HaveBuffer(scp, bufferp, 1))
383 /* otherwise, load the buffer and try again */
384 lock_ReleaseMutex(&bufferp->mx);
385 code = cm_GetBuffer(scp, bufferp, NULL, userp, reqp);
386 lock_ReleaseMutex(&scp->mx);
387 lock_ObtainMutex(&bufferp->mx);
388 lock_ObtainMutex(&scp->mx);
393 /* We try to determine emptiness without looking beyond the first page,
394 * and without assuming "." and ".." are present and are on the first
395 * page (though these assumptions might, after all, be reasonable).
397 hashTable = (unsigned short *)(bufferp->datap + (32 * 5));
398 for (i=0; i<128; i++) {
399 idx = ntohs(hashTable[i]);
405 dep = (cm_dirEntry_t *)(bufferp->datap + (32 * idx));
406 if (strcmp(dep->name, ".") == 0)
408 else if (strcmp(dep->name, "..") == 0)
411 code = CM_ERROR_NOTEMPTY;
414 idx = ntohs(dep->next);
417 if (BeyondPage && HaveDot && HaveDotDot)
418 code = CM_ERROR_NOTEMPTY;
422 lock_ReleaseMutex(&bufferp->mx);
423 buf_Release(bufferp);
424 lock_ReleaseMutex(&scp->mx);
429 * Iterate through all entries in a directory.
430 * When the function funcp is called, the buffer is locked but the
431 * directory vnode is not.
433 long cm_ApplyDir(cm_scache_t *scp, cm_DirFuncp_t funcp, void *parmp,
434 osi_hyper_t *startOffsetp, cm_user_t *userp, cm_req_t *reqp,
435 cm_scache_t **retscp)
442 osi_hyper_t dirLength;
443 osi_hyper_t bufferOffset;
444 osi_hyper_t curOffset;
448 cm_pageHeader_t *pageHeaderp;
450 long nextEntryCookie;
451 int numDirChunks; /* # of 32 byte dir chunks in this entry */
453 /* get the directory size */
454 lock_ObtainMutex(&scp->mx);
455 code = cm_SyncOp(scp, NULL, userp, reqp, PRSFS_LOOKUP,
456 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_GETSTATUS);
458 lock_ReleaseMutex(&scp->mx);
462 if (scp->fileType != CM_SCACHETYPE_DIRECTORY) {
463 lock_ReleaseMutex(&scp->mx);
464 return CM_ERROR_NOTDIR;
467 if ( retscp ) /* if this is a lookup call */
469 cm_lookupSearch_t* sp = parmp;
470 int casefold = sp->caseFold;
472 sp->caseFold = 0; /* we have a strong preference for exact matches */
473 if ( *retscp = cm_dnlcLookup(scp, sp)) /* dnlc hit */
475 sp->caseFold = casefold;
476 lock_ReleaseMutex(&scp->mx);
480 sp->caseFold = casefold;
484 * XXX We only get the length once. It might change when we drop the
487 dirLength = scp->length;
489 lock_ReleaseMutex(&scp->mx);
492 bufferOffset.LowPart = bufferOffset.HighPart = 0;
494 curOffset = *startOffsetp;
496 curOffset.HighPart = 0;
497 curOffset.LowPart = 0;
501 /* make sure that curOffset.LowPart doesn't point to the first
502 * 32 bytes in the 2nd through last dir page, and that it
503 * doesn't point at the first 13 32-byte chunks in the first
504 * dir page, since those are dir and page headers, and don't
505 * contain useful information.
507 temp = curOffset.LowPart & (2048-1);
508 if (curOffset.HighPart == 0 && curOffset.LowPart < 2048) {
509 /* we're in the first page */
510 if (temp < 13*32) temp = 13*32;
513 /* we're in a later dir page */
514 if (temp < 32) temp = 32;
517 /* make sure the low order 5 bits are zero */
520 /* now put temp bits back ito curOffset.LowPart */
521 curOffset.LowPart &= ~(2048-1);
522 curOffset.LowPart |= temp;
524 /* check if we've passed the dir's EOF */
525 if (LargeIntegerGreaterThanOrEqualTo(curOffset, dirLength))
528 /* see if we can use the bufferp we have now; compute in which
529 * page the current offset would be, and check whether that's
530 * the offset of the buffer we have. If not, get the buffer.
532 thyper.HighPart = curOffset.HighPart;
533 thyper.LowPart = curOffset.LowPart & ~(buf_bufferSize-1);
534 if (!bufferp || !LargeIntegerEqualTo(thyper, bufferOffset)) {
537 lock_ReleaseMutex(&bufferp->mx);
538 buf_Release(bufferp);
542 lock_ObtainRead(&scp->bufCreateLock);
543 code = buf_Get(scp, &thyper, &bufferp);
544 lock_ReleaseRead(&scp->bufCreateLock);
546 lock_ObtainMutex(&bufferp->mx);
548 bufferOffset = thyper;
550 /* now get the data in the cache */
552 lock_ObtainMutex(&scp->mx);
553 code = cm_SyncOp(scp, bufferp, userp, reqp,
555 CM_SCACHESYNC_NEEDCALLBACK
557 | CM_SCACHESYNC_BUFLOCKED);
559 lock_ReleaseMutex(&scp->mx);
563 if (cm_HaveBuffer(scp, bufferp, 1)) {
564 lock_ReleaseMutex(&scp->mx);
568 /* otherwise, load the buffer and try again */
569 lock_ReleaseMutex(&bufferp->mx);
570 code = cm_GetBuffer(scp, bufferp, NULL, userp,
572 lock_ReleaseMutex(&scp->mx);
573 lock_ObtainMutex(&bufferp->mx);
577 lock_ReleaseMutex(&bufferp->mx);
578 buf_Release(bufferp);
582 } /* if (wrong buffer) ... */
584 /* now we have the buffer containing the entry we're interested
585 * in; copy it out if it represents a non-deleted entry.
587 entryInDir = curOffset.LowPart & (2048-1);
588 entryInBuffer = curOffset.LowPart & (buf_bufferSize - 1);
590 /* page header will help tell us which entries are free. Page
591 * header can change more often than once per buffer, since
592 * AFS 3 dir page size may be less than (but not more than) a
593 * buffer package buffer.
595 /* only look intra-buffer */
596 temp = curOffset.LowPart & (buf_bufferSize - 1);
597 temp &= ~(2048 - 1); /* turn off intra-page bits */
598 pageHeaderp = (cm_pageHeader_t *) (bufferp->datap + temp);
600 /* now determine which entry we're looking at in the page. If
601 * it is free (there's a free bitmap at the start of the dir),
602 * we should skip these 32 bytes.
604 slotInPage = (entryInDir & 0x7e0) >> 5;
605 if (!(pageHeaderp->freeBitmap[slotInPage>>3]
606 & (1 << (slotInPage & 0x7)))) {
607 /* this entry is free */
608 numDirChunks = 1; /* only skip this guy */
612 tp = bufferp->datap + entryInBuffer;
613 dep = (cm_dirEntry_t *) tp; /* now points to AFS3 dir entry */
615 /* while we're here, compute the next entry's location, too,
616 * since we'll need it when writing out the cookie into the
617 * dir listing stream.
619 numDirChunks = cm_NameEntries(dep->name, NULL);
621 /* compute the offset of the cookie representing the next entry */
622 nextEntryCookie = curOffset.LowPart
623 + (CM_DIR_CHUNKSIZE * numDirChunks);
625 if (dep->fid.vnode != 0) {
626 /* this is one of the entries to use: it is not deleted */
627 code = (*funcp)(scp, dep, parmp, &curOffset);
629 } /* if we're including this name */
632 /* and adjust curOffset to be where the new cookie is */
634 thyper.LowPart = CM_DIR_CHUNKSIZE * numDirChunks;
635 curOffset = LargeIntegerAdd(thyper, curOffset);
636 } /* while copying data for dir listing */
638 /* release the mutex */
640 lock_ReleaseMutex(&bufferp->mx);
641 buf_Release(bufferp);
646 int cm_NoneUpper(char *s)
650 if (c >= 'A' && c <= 'Z')
655 int cm_NoneLower(char *s)
659 if (c >= 'a' && c <= 'z')
664 long cm_LookupSearchProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
667 cm_lookupSearch_t *sp;
672 sp = (cm_lookupSearch_t *) rockp;
674 matchName = dep->name;
676 match = cm_stricmp(matchName, sp->searchNamep);
678 match = strcmp(matchName, sp->searchNamep);
682 && !cm_Is8Dot3(dep->name)) {
683 matchName = shortName;
684 cm_Gen8Dot3Name(dep, shortName, NULL);
686 match = cm_stricmp(matchName, sp->searchNamep);
688 match = strcmp(matchName, sp->searchNamep);
695 if(!sp->caseFold) sp->ExactFound = 1;
697 if (!sp->caseFold || matchName == shortName) {
698 sp->fid.vnode = ntohl(dep->fid.vnode);
699 sp->fid.unique = ntohl(dep->fid.unique);
700 return CM_ERROR_STOPNOW;
704 * If we get here, we are doing a case-insensitive search, and we
705 * have found a match. Now we determine what kind of match it is:
706 * exact, lower-case, upper-case, or none of the above. This is done
707 * in order to choose among matches, if there are more than one.
710 /* Exact matches are the best. */
711 match = strcmp(matchName, sp->searchNamep);
714 sp->fid.vnode = ntohl(dep->fid.vnode);
715 sp->fid.unique = ntohl(dep->fid.unique);
716 return CM_ERROR_STOPNOW;
719 /* Lower-case matches are next. */
722 if (cm_NoneUpper(matchName)) {
727 /* Upper-case matches are next. */
730 if (cm_NoneLower(matchName)) {
735 /* General matches are last. */
741 sp->fid.vnode = ntohl(dep->fid.vnode);
742 sp->fid.unique = ntohl(dep->fid.unique);
746 /* read the contents of a mount point into the appropriate string.
747 * called with locked scp, and returns with locked scp.
749 long cm_ReadMountPoint(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp)
756 if (scp->mountPointStringp) return 0;
758 /* otherwise, we have to read it in */
759 lock_ReleaseMutex(&scp->mx);
761 lock_ObtainRead(&scp->bufCreateLock);
762 thyper.LowPart = thyper.HighPart = 0;
763 code = buf_Get(scp, &thyper, &bufp);
764 lock_ReleaseRead(&scp->bufCreateLock);
766 lock_ObtainMutex(&scp->mx);
771 code = cm_SyncOp(scp, bufp, userp, reqp, 0,
772 CM_SCACHESYNC_READ | CM_SCACHESYNC_NEEDCALLBACK);
777 if (cm_HaveBuffer(scp, bufp, 0)) break;
779 /* otherwise load buffer */
780 code = cm_GetBuffer(scp, bufp, NULL, userp, reqp);
785 /* locked, has callback, has valid data in buffer */
786 if ((tlen = scp->length.LowPart) > 1000) return CM_ERROR_TOOBIG;
788 code = CM_ERROR_INVAL;
792 /* someone else did the work while we were out */
793 if (scp->mountPointStringp) {
798 /* otherwise, copy out the link */
799 scp->mountPointStringp = malloc(tlen);
800 memcpy(scp->mountPointStringp, bufp->datap, tlen);
802 /* now make it null-terminated. Note that the original contents of a
803 * link that is a mount point is "#volname." where "." is there just to
804 * be turned into a null. That is, we can trash the last char of the
805 * link without damaging the vol name. This is a stupid convention,
806 * but that's the protocol.
808 scp->mountPointStringp[tlen-1] = 0;
812 if (bufp) buf_Release(bufp);
816 /* called with a locked scp and chases the mount point, yielding outScpp.
817 * scp remains locked, just for simplicity of describing the interface.
819 long cm_FollowMountPoint(cm_scache_t *scp, cm_scache_t *dscp, cm_user_t *userp,
820 cm_req_t *reqp, cm_scache_t **outScpp)
835 if (scp->mountRootFidp && scp->mountRootGen >= cm_mountRootGen) {
836 tfid = *scp->mountRootFidp;
837 lock_ReleaseMutex(&scp->mx);
838 code = cm_GetSCache(&tfid, outScpp, userp, reqp);
839 lock_ObtainMutex(&scp->mx);
843 /* parse the volume name */
844 mpNamep = scp->mountPointStringp;
846 tlen = strlen(scp->mountPointStringp);
847 mtType = *scp->mountPointStringp;
848 cellNamep = malloc(tlen);
849 volNamep = malloc(tlen);
851 cp = strrchr(mpNamep, ':');
853 /* cellular mount point */
854 memset(cellNamep, 0, tlen);
855 strncpy(cellNamep, mpNamep+1, cp - mpNamep - 1);
856 strcpy(volNamep, cp+1);
857 /* now look up the cell */
858 cellp = cm_GetCell(cellNamep, CM_FLAG_CREATE);
862 strcpy(volNamep, mpNamep+1);
864 cellp = cm_FindCellByID(scp->fid.cell);
868 code = CM_ERROR_NOSUCHCELL;
872 vnLength = strlen(volNamep);
873 if (vnLength >= 8 && strcmp(volNamep + vnLength - 7, ".backup") == 0)
875 else if (vnLength >= 10
876 && strcmp(volNamep + vnLength - 9, ".readonly") == 0)
881 /* check for backups within backups */
883 && (scp->flags & (CM_SCACHEFLAG_RO | CM_SCACHEFLAG_PURERO))
884 == CM_SCACHEFLAG_RO) {
885 code = CM_ERROR_NOSUCHVOLUME;
889 /* now we need to get the volume */
890 lock_ReleaseMutex(&scp->mx);
891 code = cm_GetVolumeByName(cellp, volNamep, userp, reqp, 0, &volp);
892 lock_ObtainMutex(&scp->mx);
895 /* save the parent of the volume root for this is the
896 * place where the volume is mounted and we must remember
897 * this in the volume structure rather than just in the
898 * scache entry lest the scache entry gets recycled
901 lock_ObtainMutex(&volp->mx);
902 if(volp->dotdotFidp == (cm_fid_t *) NULL)
903 volp->dotdotFidp = (cm_fid_t *) malloc(sizeof(cm_fid_t));
904 *(volp->dotdotFidp) = dscp->fid;
905 lock_ReleaseMutex(&volp->mx);
907 if (scp->mountRootFidp == 0) {
908 scp->mountRootFidp = malloc(sizeof(cm_fid_t));
910 scp->mountRootFidp->cell = cellp->cellID;
911 /* if the mt pt is in a read-only volume (not just a
912 * backup), and if there is a read-only volume for the
913 * target, and if this is a type '#' mount point, use
914 * the read-only, otherwise use the one specified.
916 if (mtType == '#' && (scp->flags & CM_SCACHEFLAG_PURERO)
917 && volp->roID != 0 && type == RWVOL)
920 scp->mountRootFidp->volume = volp->roID;
921 else if (type == BACKVOL)
922 scp->mountRootFidp->volume = volp->bkID;
924 scp->mountRootFidp->volume = volp->rwID;
926 /* the rest of the fid is a magic number */
927 scp->mountRootFidp->vnode = 1;
928 scp->mountRootFidp->unique = 1;
929 scp->mountRootGen = cm_mountRootGen;
931 tfid = *scp->mountRootFidp;
932 lock_ReleaseMutex(&scp->mx);
933 code = cm_GetSCache(&tfid, outScpp, userp, reqp);
934 lock_ObtainMutex(&scp->mx);
943 int cm_ExpandSysName(char *inp, char *outp, long outSize)
948 tp = strrchr(inp, '@');
949 if (tp == NULL) return 0; /* no @sys */
951 if (strcmp(tp, "@sys") != 0) return 0; /* no @sys */
953 /* caller just wants to know if this is a valid @sys type of name */
954 if (outp == NULL) return 1;
956 /* otherwise generate the properly expanded @sys name */
957 prefixCount = tp - inp;
959 strncpy(outp, inp, prefixCount); /* copy out "a." from "a.@sys" */
960 outp[prefixCount] = 0; /* null terminate the "a." */
961 strcat(outp, cm_sysName); /* append i386_nt40 */
965 long cm_Lookup(cm_scache_t *dscp, char *namep, long flags, cm_user_t *userp,
966 cm_req_t *reqp, cm_scache_t **outpScpp)
969 int dnlcHit = 1; /* did we hit in the dnlc? yes, we did */
970 cm_scache_t *tscp = NULL;
971 cm_scache_t *mountedScp;
972 cm_lookupSearch_t rock;
976 if (dscp->fid.vnode == 1 && dscp->fid.unique == 1
977 && strcmp(namep, "..") == 0) {
978 if (dscp->dotdotFidp == (cm_fid_t *)NULL
979 || dscp->dotdotFidp->volume == 0)
980 return CM_ERROR_NOSUCHVOLUME;
981 rock.fid = *dscp->dotdotFidp;
985 if (cm_ExpandSysName(namep, tname, sizeof(tname))) {
988 memset(&rock, 0, sizeof(rock));
989 rock.fid.cell = dscp->fid.cell;
990 rock.fid.volume = dscp->fid.volume;
991 rock.searchNamep = namep;
992 rock.caseFold = (flags & CM_FLAG_CASEFOLD);
993 rock.hasTilde = ((strchr(namep, '~') != NULL) ? 1 : 0);
995 /* If NOMOUNTCHASE, bypass DNLC by passing NULL scp pointer */
996 code = cm_ApplyDir(dscp, cm_LookupSearchProc, &rock, NULL, userp, reqp,
997 (flags & CM_FLAG_NOMOUNTCHASE) ? NULL : &tscp);
999 /* code == 0 means we fell off the end of the dir, while stopnow means
1000 * that we stopped early, probably because we found the entry we're
1001 * looking for. Any other non-zero code is an error.
1003 if (code && code != CM_ERROR_STOPNOW)
1006 getroot = (dscp==cm_rootSCachep) ;
1008 if (!cm_freelanceEnabled || !getroot) {
1009 if (flags & CM_FLAG_CHECKPATH)
1010 return CM_ERROR_NOSUCHPATH;
1012 return CM_ERROR_NOSUCHFILE;
1014 else { /* nonexistent dir on freelance root, so add it */
1015 code = cm_FreelanceAddMount(namep, namep, "root.cell.",
1017 if (code < 0) { /* add mount point failed, so give up */
1018 if (flags & CM_FLAG_CHECKPATH)
1019 return CM_ERROR_NOSUCHPATH;
1021 return CM_ERROR_NOSUCHFILE;
1023 tscp = NULL; /* to force call of cm_GetSCache */
1028 if ( !tscp ) /* we did not find it in the dnlc */
1031 code = cm_GetSCache(&rock.fid, &tscp, userp, reqp);
1035 /* tscp is now held */
1037 lock_ObtainMutex(&tscp->mx);
1038 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
1039 CM_SCACHESYNC_GETSTATUS | CM_SCACHESYNC_NEEDCALLBACK);
1041 lock_ReleaseMutex(&tscp->mx);
1042 cm_ReleaseSCache(tscp);
1045 /* tscp is now locked */
1047 if (!(flags & CM_FLAG_NOMOUNTCHASE)
1048 && tscp->fileType == CM_SCACHETYPE_MOUNTPOINT) {
1049 /* mount points are funny: they have a volume name to mount
1052 code = cm_ReadMountPoint(tscp, userp, reqp);
1054 code = cm_FollowMountPoint(tscp, dscp, userp, reqp,
1056 lock_ReleaseMutex(&tscp->mx);
1057 cm_ReleaseSCache(tscp);
1064 lock_ReleaseMutex(&tscp->mx);
1067 /* copy back pointer */
1070 /* insert scache in dnlc */
1071 if ( !dnlcHit && !(flags & CM_FLAG_NOMOUNTCHASE) && rock.ExactFound ) {
1072 /* lock the directory entry to prevent racing callback revokes */
1073 lock_ObtainMutex(&dscp->mx);
1074 if ( dscp->cbServerp && dscp->cbExpires )
1075 cm_dnlcEnter(dscp, namep, tscp);
1076 lock_ReleaseMutex(&dscp->mx);
1083 long cm_Unlink(cm_scache_t *dscp, char *namep, cm_user_t *userp, cm_req_t *reqp)
1089 AFSFetchStatus newDirStatus;
1092 #ifdef AFS_FREELANCE_CLIENT
1093 if (cm_freelanceEnabled && dscp == cm_rootSCachep) {
1094 /* deleting a mount point from the root dir. */
1095 code = cm_FreelanceRemoveMount(namep);
1100 /* make sure we don't screw up the dir status during the merge */
1101 lock_ObtainMutex(&dscp->mx);
1102 sflags = CM_SCACHESYNC_STOREDATA;
1103 code = cm_SyncOp(dscp, NULL, userp, reqp, 0, sflags);
1104 lock_ReleaseMutex(&dscp->mx);
1105 if (code) return code;
1108 afsFid.Volume = dscp->fid.volume;
1109 afsFid.Vnode = dscp->fid.vnode;
1110 afsFid.Unique = dscp->fid.unique;
1112 code = cm_Conn(&dscp->fid, userp, reqp, &connp);
1115 code = RXAFS_RemoveFile(connp->callp, &afsFid, namep,
1116 &newDirStatus, &volSync);
1118 } while (cm_Analyze(connp, userp, reqp,
1119 &dscp->fid, &volSync, NULL, code));
1120 code = cm_MapRPCError(code, reqp);
1122 lock_ObtainMutex(&dscp->mx);
1123 cm_dnlcRemove(dscp, namep);
1124 cm_SyncOpDone(dscp, NULL, sflags);
1125 if (code == 0) cm_MergeStatus(dscp, &newDirStatus, &volSync, userp, 0);
1126 lock_ReleaseMutex(&dscp->mx);
1131 /* called with a locked vnode, and fills in the link info.
1132 * returns this the vnode still locked.
1134 long cm_HandleLink(cm_scache_t *linkScp, cm_user_t *userp, cm_req_t *reqp)
1141 lock_AssertMutex(&linkScp->mx);
1142 if (!linkScp->mountPointStringp) {
1143 /* read the link data */
1144 lock_ReleaseMutex(&linkScp->mx);
1145 thyper.LowPart = thyper.HighPart = 0;
1146 code = buf_Get(linkScp, &thyper, &bufp);
1147 lock_ObtainMutex(&linkScp->mx);
1148 if (code) return code;
1150 code = cm_SyncOp(linkScp, bufp, userp, reqp, 0,
1151 CM_SCACHESYNC_NEEDCALLBACK | CM_SCACHESYNC_READ);
1156 if (cm_HaveBuffer(linkScp, bufp, 0)) break;
1158 code = cm_GetBuffer(linkScp, bufp, NULL, userp, reqp);
1163 } /* while loop to get the data */
1165 /* now if we still have no link read in,
1166 * copy the data from the buffer */
1167 if ((temp = linkScp->length.LowPart) >= 1024) {
1169 return CM_ERROR_TOOBIG;
1172 /* otherwise, it fits; make sure it is still null (could have
1173 * lost race with someone else referencing this link above),
1174 * and if so, copy in the data.
1176 if (linkScp->mountPointStringp == NULL) {
1177 linkScp->mountPointStringp = malloc(temp+1);
1178 strncpy(linkScp->mountPointStringp, bufp->datap, temp);
1179 linkScp->mountPointStringp[temp] = 0; /* null terminate */
1182 } /* don't have sym link contents cached */
1187 /* called with a held vnode and a path suffix, with the held vnode being a
1188 * symbolic link. Our goal is to generate a new path to interpret, and return
1189 * this new path in newSpaceBufferp. If the new vnode is relative to a dir
1190 * other than the directory containing the symbolic link, then the new root is
1191 * returned in *newRootScpp, otherwise a null is returned there.
1193 long cm_AssembleLink(cm_scache_t *linkScp, char *pathSuffixp,
1194 cm_scache_t **newRootScpp, cm_space_t **newSpaceBufferp,
1195 cm_user_t *userp, cm_req_t *reqp)
1201 lock_ObtainMutex(&linkScp->mx);
1202 code = cm_HandleLink(linkScp, userp, reqp);
1203 if (code) goto done;
1205 /* if we may overflow the buffer, bail out; buffer is signficantly
1206 * bigger than max path length, so we don't really have to worry about
1207 * being a little conservative here.
1209 if (strlen(linkScp->mountPointStringp) + strlen(pathSuffixp) + 2
1210 >= CM_UTILS_SPACESIZE)
1211 return CM_ERROR_TOOBIG;
1213 tsp = cm_GetSpace();
1214 linkp = linkScp->mountPointStringp;
1215 if (strncmp(linkp, cm_mountRoot, cm_mountRootLen) == 0) {
1216 if (strlen(linkp) > cm_mountRootLen)
1217 strcpy(tsp->data, linkp+cm_mountRootLen+1);
1220 *newRootScpp = cm_rootSCachep;
1221 cm_HoldSCache(cm_rootSCachep);
1222 } else if (*linkp == '\\' || *linkp == '/') {
1223 /* formerly, this was considered to be from the AFS root,
1224 but this seems to create problems. instead, we will just
1227 strcpy(tsp->data, linkp+1);
1228 *newRootScpp = cm_rootSCachep;
1229 cm_HoldSCache(cm_rootSCachep);
1231 code = CM_ERROR_NOSUCHPATH;
1236 /* a relative link */
1237 strcpy(tsp->data, linkp);
1238 *newRootScpp = NULL;
1240 if (pathSuffixp[0] != 0) { /* if suffix string is non-null */
1241 strcat(tsp->data, "\\");
1242 strcat(tsp->data, pathSuffixp);
1244 *newSpaceBufferp = tsp;
1248 lock_ReleaseMutex(&linkScp->mx);
1252 long cm_NameI(cm_scache_t *rootSCachep, char *pathp, long flags,
1253 cm_user_t *userp, char *tidPathp, cm_req_t *reqp, cm_scache_t **outScpp)
1256 char *tp; /* ptr moving through input buffer */
1257 char tc; /* temp char */
1258 int haveComponent; /* has new component started? */
1259 char component[256]; /* this is the new component */
1260 char *cp; /* component name being assembled */
1261 cm_scache_t *tscp; /* current location in the hierarchy */
1262 cm_scache_t *nscp; /* next dude down */
1263 cm_scache_t *dirScp; /* last dir we searched */
1264 cm_scache_t *linkScp; /* new root for the symlink we just
1266 cm_space_t *psp; /* space for current path, if we've hit
1268 cm_space_t *tempsp; /* temp vbl */
1269 char *restp; /* rest of the pathname to interpret */
1270 int symlinkCount; /* count of # of symlinks traversed */
1271 int extraFlag; /* avoid chasing mt pts for dir cmd */
1272 int phase = 1; /* 1 = tidPathp, 2 = pathp */
1282 cm_HoldSCache(tscp);
1287 /* map Unix slashes into DOS ones so we can interpret Unix
1290 if (tc == '/') tc = '\\';
1292 if (!haveComponent) {
1293 if (tc == '\\') continue;
1310 /* we have a component here */
1311 if (tc == 0 || tc == '\\') {
1312 /* end of the component; we're at the last
1313 * component if tc == 0. However, if the last
1314 * is a symlink, we have more to do.
1316 *cp++ = 0; /* add null termination */
1318 if ((flags & CM_FLAG_DIRSEARCH) && tc == 0)
1319 extraFlag = CM_FLAG_NOMOUNTCHASE;
1320 code = cm_Lookup(tscp, component,
1322 userp, reqp, &nscp);
1325 cm_ReleaseSCache(tscp);
1326 if (psp) cm_FreeSpace(psp);
1329 haveComponent = 0; /* component done */
1330 dirScp = tscp; /* for some symlinks */
1331 tscp = nscp; /* already held */
1332 if (tc == 0 && !(flags & CM_FLAG_FOLLOW) && phase == 2) {
1334 cm_ReleaseSCache(dirScp);
1338 /* now, if tscp is a symlink, we should follow
1339 * it and assemble the path again.
1341 lock_ObtainMutex(&tscp->mx);
1342 code = cm_SyncOp(tscp, NULL, userp, reqp, 0,
1343 CM_SCACHESYNC_GETSTATUS
1344 | CM_SCACHESYNC_NEEDCALLBACK);
1346 lock_ReleaseMutex(&tscp->mx);
1347 cm_ReleaseSCache(tscp);
1348 cm_ReleaseSCache(dirScp);
1351 if (tscp->fileType == CM_SCACHETYPE_SYMLINK) {
1352 /* this is a symlink; assemble a new buffer */
1353 lock_ReleaseMutex(&tscp->mx);
1354 if (symlinkCount++ >= 16) {
1355 cm_ReleaseSCache(tscp);
1356 cm_ReleaseSCache(dirScp);
1357 if (psp) cm_FreeSpace(psp);
1358 return CM_ERROR_TOOBIG;
1360 if (tc == 0) restp = "";
1362 code = cm_AssembleLink(tscp, restp, &linkScp, &tempsp, userp, reqp);
1364 /* something went wrong */
1365 cm_ReleaseSCache(tscp);
1366 cm_ReleaseSCache(dirScp);
1370 /* otherwise, tempsp has the new path,
1371 * and linkScp is the new root from
1372 * which to interpret that path.
1373 * Continue with the namei processing,
1374 * also doing the bookkeeping for the
1375 * space allocation and tracking the
1376 * vnode reference counts.
1378 if (psp) cm_FreeSpace(psp);
1381 cm_ReleaseSCache(tscp);
1382 tscp = linkScp; /* already held
1383 * by AssembleLink */
1384 /* now, if linkScp is null, that's
1385 * AssembleLink's way of telling us that
1386 * the sym link is relative to the dir
1387 * containing the link. We have a ref
1388 * to it in dirScp, and we hold it now
1389 * and reuse it as the new spot in the
1393 cm_HoldSCache(dirScp);
1396 } /* if we have a sym link */
1398 /* not a symlink, we may be done */
1399 lock_ReleaseMutex(&tscp->mx);
1406 cm_ReleaseSCache(dirScp);
1411 cm_ReleaseSCache(dirScp);
1412 } /* end of a component */
1414 } /* we have a component */
1415 } /* big while loop over all components */
1418 if (psp) cm_FreeSpace(psp);
1419 if (code == 0) *outScpp = tscp;
1423 /* called with a dir, and a vnode within the dir that happens to be a symlink.
1424 * We chase the link, and return a held pointer to the target, if it exists,
1425 * in *outScpp. If we succeed, we return 0, otherwise we return an error code
1426 * and do not hold or return a target vnode.
1428 * This is very similar to calling cm_NameI with the last component of a name,
1429 * which happens to be a symlink, except that we've already passed by the name.
1431 * This function is typically called by the directory listing functions, which
1432 * encounter symlinks but need to return the proper file length so programs
1433 * like "more" work properly when they make use of the attributes retrieved from
1436 * The input vnode should not be locked when this function is called.
1438 long cm_EvaluateSymLink(cm_scache_t *dscp, cm_scache_t *linkScp,
1439 cm_scache_t **outScpp, cm_user_t *userp, cm_req_t *reqp)
1443 cm_scache_t *newRootScp;
1445 osi_Log1(afsd_logp, "Evaluating symlink vp %x", linkScp);
1447 code = cm_AssembleLink(linkScp, "", &newRootScp, &spacep, userp, reqp);
1448 if (code) return code;
1450 /* now, if newRootScp is NULL, we're really being told that the symlink
1451 * is relative to the current directory (dscp).
1453 if (newRootScp == NULL) {
1455 cm_HoldSCache(dscp);
1458 code = cm_NameI(newRootScp, spacep->data,
1459 CM_FLAG_CASEFOLD | CM_FLAG_FOLLOW | CM_FLAG_DIRSEARCH,
1460 userp, NULL, reqp, outScpp);
1462 /* this stuff is allocated no matter what happened on the namei call,
1464 cm_FreeSpace(spacep);
1465 cm_ReleaseSCache(newRootScp);
1470 /* make this big enough so that one buffer of dir pages won't overflow. We'll
1471 * check anyway, but we want to minimize the chance that we have to leave stuff
1474 #define CM_BULKMAX 128
1476 /* rock for bulk stat calls */
1477 typedef struct cm_bulkStat {
1478 osi_hyper_t bufOffset; /* only do it for things in this buffer page */
1480 /* info for the actual call */
1481 int counter; /* next free slot */
1482 AFSFid fids[CM_BULKMAX];
1483 AFSFetchStatus stats[CM_BULKMAX];
1484 AFSCallBack callbacks[CM_BULKMAX];
1487 /* for a given entry, make sure that it isn't in the stat cache, and then
1488 * add it to the list of file IDs to be obtained.
1490 * Don't bother adding it if we already have a vnode. Note that the dir
1491 * is locked, so we have to be careful checking the vnode we're thinking of
1492 * processing, to avoid deadlocks.
1494 long cm_TryBulkProc(cm_scache_t *scp, cm_dirEntry_t *dep, void *rockp,
1505 /* Don't overflow bsp. */
1506 if (bsp->counter >= CM_BULKMAX)
1507 return CM_ERROR_STOPNOW;
1509 thyper.LowPart = buf_bufferSize;
1510 thyper.HighPart = 0;
1511 thyper = LargeIntegerAdd(thyper, bsp->bufOffset);
1513 /* thyper is now the first byte past the end of the record we're
1514 * interested in, and bsp->bufOffset is the first byte of the record
1515 * we're interested in.
1516 * Skip data in the others.
1519 if (LargeIntegerLessThan(*offp, bsp->bufOffset))
1521 if (LargeIntegerGreaterThanOrEqualTo(*offp, thyper))
1522 return CM_ERROR_STOPNOW;
1523 if (strcmp(dep->name, ".") == 0 || strcmp(dep->name, "..") == 0)
1526 tfid.cell = scp->fid.cell;
1527 tfid.volume = scp->fid.volume;
1528 tfid.vnode = ntohl(dep->fid.vnode);
1529 tfid.unique = ntohl(dep->fid.unique);
1530 tscp = cm_FindSCache(&tfid);
1532 if (lock_TryMutex(&tscp->mx)) {
1533 /* we have an entry that we can look at */
1534 if (cm_HaveCallback(tscp)) {
1535 /* we have a callback on it. Don't bother
1536 * fetching this stat entry, since we're happy
1537 * with the info we have.
1539 lock_ReleaseMutex(&tscp->mx);
1540 cm_ReleaseSCache(tscp);
1543 lock_ReleaseMutex(&tscp->mx);
1545 cm_ReleaseSCache(tscp);
1548 #ifdef AFS_FREELANCE_CLIENT
1549 // yj: if this is a mountpoint under root.afs then we don't want it
1550 // to be bulkstat-ed, instead, we call getSCache directly and under
1551 // getSCache, it is handled specially.
1552 if (cm_freelanceEnabled &&
1553 tfid.cell==0x1 && tfid.volume==0x20000001 &&
1554 !(tfid.vnode==0x1 && tfid.unique==0x1) )
1557 afsi_log(" cm_trybulkproc going to call getscache");
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, &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, 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, &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, &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, 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, 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, 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,
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);