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STABLE14-callback-deadlock-20040819
cm_CallbackNotifyChange(scp); must not be called with scp locked
(cherry picked from commit 7c01e67317)
This commit is contained in:
Jeffrey Altman
Jeffrey Altman
parent
e92fa6160f
commit
bc5a0084c2
@ -90,33 +90,34 @@ void cm_RecordRacingRevoke(cm_fid_t *fidp, long cancelFlags)
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/*
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* When we lose a callback, may have to send change notification replies.
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* Do not call with a lock on the scp.
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*/
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void cm_CallbackNotifyChange(cm_scache_t *scp)
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{
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osi_Log2(afsd_logp, "CallbackNotifyChange FileType %d Flags %lX",
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scp->fileType, scp->flags);
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if (scp->fileType == CM_SCACHETYPE_DIRECTORY) {
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if (scp->flags & CM_SCACHEFLAG_ANYWATCH)
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smb_NotifyChange(0,
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FILE_NOTIFY_GENERIC_DIRECTORY_FILTER,
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scp, NULL, NULL, TRUE);
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} else {
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cm_fid_t tfid;
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cm_scache_t *dscp;
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if (scp->fileType == CM_SCACHETYPE_DIRECTORY) {
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if (scp->flags & CM_SCACHEFLAG_ANYWATCH)
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smb_NotifyChange(0,
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FILE_NOTIFY_GENERIC_DIRECTORY_FILTER,
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scp, NULL, NULL, TRUE);
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} else {
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cm_fid_t tfid;
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cm_scache_t *dscp;
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tfid.cell = scp->fid.cell;
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tfid.volume = scp->fid.volume;
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tfid.vnode = scp->parentVnode;
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tfid.unique = scp->parentUnique;
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dscp = cm_FindSCache(&tfid);
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if (dscp &&
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dscp->flags & CM_SCACHEFLAG_ANYWATCH)
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smb_NotifyChange(0,
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FILE_NOTIFY_GENERIC_FILE_FILTER,
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dscp, NULL, NULL, TRUE);
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if (dscp) cm_ReleaseSCache(dscp);
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}
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tfid.cell = scp->fid.cell;
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tfid.volume = scp->fid.volume;
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tfid.vnode = scp->parentVnode;
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tfid.unique = scp->parentUnique;
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dscp = cm_FindSCache(&tfid);
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if (dscp &&
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dscp->flags & CM_SCACHEFLAG_ANYWATCH)
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smb_NotifyChange( 0,
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FILE_NOTIFY_GENERIC_FILE_FILTER,
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dscp, NULL, NULL, TRUE);
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if (dscp) cm_ReleaseSCache(dscp);
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}
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}
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/* called with no locks held for every file ID that is revoked directly by
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@ -906,13 +907,13 @@ void cm_CheckCBExpiration(void)
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for(scp = cm_hashTablep[i]; scp; scp=scp->nextp) {
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scp->refCount++;
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lock_ReleaseWrite(&cm_scacheLock);
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lock_ObtainMutex(&scp->mx);
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if (scp->cbExpires > 0 && (scp->cbServerp == NULL || now > scp->cbExpires)) {
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osi_Log1(afsd_logp, "Callback Expiration Discarding SCache scp %x", scp);
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cm_CallbackNotifyChange(scp);
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lock_ObtainMutex(&scp->mx);
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cm_DiscardSCache(scp);
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lock_ReleaseMutex(&scp->mx);
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}
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lock_ReleaseMutex(&scp->mx);
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lock_ObtainWrite(&cm_scacheLock);
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osi_assert(scp->refCount-- > 0);
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}
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@ -5861,211 +5861,211 @@ void smb_NotifyChange(DWORD action, DWORD notifyFilter,
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cm_scache_t *dscp, char *filename, char *otherFilename,
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BOOL isDirectParent)
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{
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smb_packet_t *watch, *lastWatch, *nextWatch;
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ULONG parmSlot, parmCount, parmOffset, dataOffset, nameLen;
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char *outData, *oldOutData;
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ULONG filter;
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USHORT fid, wtree;
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ULONG maxLen;
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BOOL twoEntries = FALSE;
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ULONG otherNameLen, oldParmCount = 0;
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DWORD otherAction;
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smb_vc_t *vcp;
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smb_fid_t *fidp;
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smb_packet_t *watch, *lastWatch, *nextWatch;
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ULONG parmSlot, parmCount, parmOffset, dataOffset, nameLen;
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char *outData, *oldOutData;
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ULONG filter;
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USHORT fid, wtree;
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ULONG maxLen;
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BOOL twoEntries = FALSE;
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ULONG otherNameLen, oldParmCount = 0;
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DWORD otherAction;
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smb_vc_t *vcp;
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smb_fid_t *fidp;
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/* Get ready for rename within directory */
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if (action == FILE_ACTION_RENAMED_OLD_NAME && otherFilename != NULL) {
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twoEntries = TRUE;
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otherAction = FILE_ACTION_RENAMED_NEW_NAME;
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}
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/* Get ready for rename within directory */
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if (action == FILE_ACTION_RENAMED_OLD_NAME && otherFilename != NULL) {
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twoEntries = TRUE;
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otherAction = FILE_ACTION_RENAMED_NEW_NAME;
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}
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osi_Log2(smb_logp,"in smb_NotifyChange for file [%s] dscp [%x]",
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osi_LogSaveString(smb_logp,filename),dscp);
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osi_LogSaveString(smb_logp,filename),dscp);
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lock_ObtainMutex(&smb_Dir_Watch_Lock);
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watch = smb_Directory_Watches;
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while (watch) {
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filter = smb_GetSMBParm(watch, 19)
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| (smb_GetSMBParm(watch, 20) << 16);
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fid = smb_GetSMBParm(watch, 21);
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wtree = smb_GetSMBParm(watch, 22) & 0xffff; /* TODO: should this be 0xff ? */
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maxLen = smb_GetSMBOffsetParm(watch, 5, 1)
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| (smb_GetSMBOffsetParm(watch, 6, 1) << 16);
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vcp = watch->vcp;
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lock_ObtainMutex(&smb_Dir_Watch_Lock);
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watch = smb_Directory_Watches;
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while (watch) {
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filter = smb_GetSMBParm(watch, 19)
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| (smb_GetSMBParm(watch, 20) << 16);
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fid = smb_GetSMBParm(watch, 21);
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wtree = smb_GetSMBParm(watch, 22) & 0xffff; /* TODO: should this be 0xff ? */
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maxLen = smb_GetSMBOffsetParm(watch, 5, 1)
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| (smb_GetSMBOffsetParm(watch, 6, 1) << 16);
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vcp = watch->vcp;
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/*
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* Strange hack - bug in NT Client and NT Server that we
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* must emulate?
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*/
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if (filter == 3 && wtree)
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filter = 0x17;
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/*
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* Strange hack - bug in NT Client and NT Server that we
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* must emulate?
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*/
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if (filter == 3 && wtree)
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filter = 0x17;
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fidp = smb_FindFID(vcp, fid, 0);
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fidp = smb_FindFID(vcp, fid, 0);
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if (!fidp) {
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osi_Log1(smb_logp," no fidp for fid[%d]",fid);
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lastWatch = watch;
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watch = watch->nextp;
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continue;
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}
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if (fidp->scp != dscp
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|| (filter & notifyFilter) == 0
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|| (!isDirectParent && !wtree)) {
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lastWatch = watch;
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watch = watch->nextp;
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continue;
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}
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if (fidp->scp != dscp
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|| (filter & notifyFilter) == 0
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|| (!isDirectParent && !wtree)) {
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osi_Log1(smb_logp," passing fidp->scp[%x]", fidp->scp);
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smb_ReleaseFID(fidp);
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lastWatch = watch;
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watch = watch->nextp;
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continue;
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}
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smb_ReleaseFID(fidp);
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lastWatch = watch;
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watch = watch->nextp;
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continue;
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}
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smb_ReleaseFID(fidp);
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osi_Log4(smb_logp,
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"Sending Change Notification for fid %d filter 0x%x wtree %d file %s",
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fid, filter, wtree, osi_LogSaveString(smb_logp, filename));
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osi_Log4(smb_logp,
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"Sending Change Notification for fid %d filter 0x%x wtree %d file %s",
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fid, filter, wtree, osi_LogSaveString(smb_logp, filename));
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nextWatch = watch->nextp;
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if (watch == smb_Directory_Watches)
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smb_Directory_Watches = nextWatch;
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else
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lastWatch->nextp = nextWatch;
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nextWatch = watch->nextp;
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if (watch == smb_Directory_Watches)
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smb_Directory_Watches = nextWatch;
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else
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lastWatch->nextp = nextWatch;
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/* Turn off WATCHED flag in dscp */
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lock_ObtainMutex(&dscp->mx);
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if (wtree)
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dscp->flags &= ~CM_SCACHEFLAG_WATCHEDSUBTREE;
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else
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dscp->flags &= ~CM_SCACHEFLAG_WATCHED;
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lock_ReleaseMutex(&dscp->mx);
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/* Turn off WATCHED flag in dscp */
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lock_ObtainMutex(&dscp->mx);
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if (wtree)
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dscp->flags &= ~CM_SCACHEFLAG_WATCHEDSUBTREE;
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else
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dscp->flags &= ~CM_SCACHEFLAG_WATCHED;
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lock_ReleaseMutex(&dscp->mx);
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/* Convert to response packet */
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((smb_t *) watch)->reb = 0x80;
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((smb_t *) watch)->wct = 0;
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/* Convert to response packet */
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((smb_t *) watch)->reb = 0x80;
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((smb_t *) watch)->wct = 0;
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/* out parms */
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if (filename == NULL)
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parmCount = 0;
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else {
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nameLen = strlen(filename);
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parmCount = 3*4 + nameLen*2;
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parmCount = (parmCount + 3) & ~3; /* pad to 4 */
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if (twoEntries) {
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otherNameLen = strlen(otherFilename);
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oldParmCount = parmCount;
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parmCount += 3*4 + otherNameLen*2;
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parmCount = (parmCount + 3) & ~3; /* pad to 4 */
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}
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if (maxLen < parmCount)
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parmCount = 0; /* not enough room */
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}
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parmOffset = 8*4 + 39;
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parmOffset += 1; /* pad to 4 */
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dataOffset = parmOffset + parmCount;
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/* out parms */
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if (filename == NULL)
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parmCount = 0;
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else {
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nameLen = strlen(filename);
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parmCount = 3*4 + nameLen*2;
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parmCount = (parmCount + 3) & ~3; /* pad to 4 */
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if (twoEntries) {
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otherNameLen = strlen(otherFilename);
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oldParmCount = parmCount;
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parmCount += 3*4 + otherNameLen*2;
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parmCount = (parmCount + 3) & ~3; /* pad to 4 */
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}
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if (maxLen < parmCount)
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parmCount = 0; /* not enough room */
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}
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parmOffset = 8*4 + 39;
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parmOffset += 1; /* pad to 4 */
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dataOffset = parmOffset + parmCount;
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parmSlot = 1;
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watch->oddByte = 1;
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/* Total Parameter Count */
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smb_SetSMBParmLong(watch, parmSlot, parmCount); parmSlot += 2;
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/* Total Data Count */
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smb_SetSMBParmLong(watch, parmSlot, 0); parmSlot += 2;
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/* Parameter Count */
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smb_SetSMBParmLong(watch, parmSlot, parmCount); parmSlot += 2;
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/* Parameter Offset */
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smb_SetSMBParmLong(watch, parmSlot, parmOffset); parmSlot += 2;
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/* Parameter Displacement */
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smb_SetSMBParmLong(watch, parmSlot, 0); parmSlot += 2;
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/* Data Count */
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smb_SetSMBParmLong(watch, parmSlot, 0); parmSlot += 2;
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/* Data Offset */
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smb_SetSMBParmLong(watch, parmSlot, dataOffset); parmSlot += 2;
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/* Data Displacement */
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smb_SetSMBParmLong(watch, parmSlot, 0); parmSlot += 2;
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smb_SetSMBParmByte(watch, parmSlot, 0); /* Setup Count */
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smb_SetSMBDataLength(watch, parmCount + 1);
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parmSlot = 1;
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watch->oddByte = 1;
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/* Total Parameter Count */
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smb_SetSMBParmLong(watch, parmSlot, parmCount); parmSlot += 2;
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/* Total Data Count */
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smb_SetSMBParmLong(watch, parmSlot, 0); parmSlot += 2;
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/* Parameter Count */
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smb_SetSMBParmLong(watch, parmSlot, parmCount); parmSlot += 2;
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/* Parameter Offset */
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smb_SetSMBParmLong(watch, parmSlot, parmOffset); parmSlot += 2;
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/* Parameter Displacement */
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smb_SetSMBParmLong(watch, parmSlot, 0); parmSlot += 2;
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/* Data Count */
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smb_SetSMBParmLong(watch, parmSlot, 0); parmSlot += 2;
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/* Data Offset */
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smb_SetSMBParmLong(watch, parmSlot, dataOffset); parmSlot += 2;
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/* Data Displacement */
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smb_SetSMBParmLong(watch, parmSlot, 0); parmSlot += 2;
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smb_SetSMBParmByte(watch, parmSlot, 0); /* Setup Count */
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smb_SetSMBDataLength(watch, parmCount + 1);
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if (parmCount != 0) {
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outData = smb_GetSMBData(watch, NULL);
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outData++; /* round to get to parmOffset */
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oldOutData = outData;
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*((DWORD *)outData) = oldParmCount; outData += 4;
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/* Next Entry Offset */
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*((DWORD *)outData) = action; outData += 4;
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/* Action */
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*((DWORD *)outData) = nameLen*2; outData += 4;
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/* File Name Length */
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mbstowcs((WCHAR *)outData, filename, nameLen);
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/* File Name */
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if (twoEntries) {
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outData = oldOutData + oldParmCount;
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*((DWORD *)outData) = 0; outData += 4;
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/* Next Entry Offset */
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*((DWORD *)outData) = otherAction; outData += 4;
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/* Action */
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*((DWORD *)outData) = otherNameLen*2;
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outData += 4; /* File Name Length */
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mbstowcs((WCHAR *)outData, otherFilename,
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otherNameLen); /* File Name */
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}
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}
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if (parmCount != 0) {
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outData = smb_GetSMBData(watch, NULL);
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outData++; /* round to get to parmOffset */
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oldOutData = outData;
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*((DWORD *)outData) = oldParmCount; outData += 4;
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/* Next Entry Offset */
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*((DWORD *)outData) = action; outData += 4;
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/* Action */
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*((DWORD *)outData) = nameLen*2; outData += 4;
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/* File Name Length */
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mbstowcs((WCHAR *)outData, filename, nameLen);
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/* File Name */
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if (twoEntries) {
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outData = oldOutData + oldParmCount;
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*((DWORD *)outData) = 0; outData += 4;
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/* Next Entry Offset */
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*((DWORD *)outData) = otherAction; outData += 4;
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/* Action */
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*((DWORD *)outData) = otherNameLen*2;
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outData += 4; /* File Name Length */
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mbstowcs((WCHAR *)outData, otherFilename,
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otherNameLen); /* File Name */
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}
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}
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/*
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* If filename is null, we don't know the cause of the
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* change notification. We return zero data (see above),
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* and set error code to NT_STATUS_NOTIFY_ENUM_DIR
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* (= 0x010C). We set the error code here by hand, without
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* modifying wct and bcc.
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*/
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if (filename == NULL) {
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((smb_t *) watch)->rcls = 0x0C;
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((smb_t *) watch)->reh = 0x01;
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((smb_t *) watch)->errLow = 0;
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((smb_t *) watch)->errHigh = 0;
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/* Set NT Status codes flag */
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((smb_t *) watch)->flg2 |= 0x4000;
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}
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/*
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* If filename is null, we don't know the cause of the
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* change notification. We return zero data (see above),
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* and set error code to NT_STATUS_NOTIFY_ENUM_DIR
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* (= 0x010C). We set the error code here by hand, without
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* modifying wct and bcc.
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*/
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if (filename == NULL) {
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((smb_t *) watch)->rcls = 0x0C;
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((smb_t *) watch)->reh = 0x01;
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((smb_t *) watch)->errLow = 0;
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((smb_t *) watch)->errHigh = 0;
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/* Set NT Status codes flag */
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((smb_t *) watch)->flg2 |= 0x4000;
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}
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smb_SendPacket(vcp, watch);
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smb_SendPacket(vcp, watch);
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smb_ReleaseVC(vcp);
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smb_FreePacket(watch);
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watch = nextWatch;
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}
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lock_ReleaseMutex(&smb_Dir_Watch_Lock);
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}
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smb_FreePacket(watch);
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watch = nextWatch;
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}
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lock_ReleaseMutex(&smb_Dir_Watch_Lock);
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}
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long smb_ReceiveNTCancel(smb_vc_t *vcp, smb_packet_t *inp, smb_packet_t *outp)
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{
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unsigned char *replyWctp;
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smb_packet_t *watch, *lastWatch;
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USHORT fid, watchtree;
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smb_fid_t *fidp;
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cm_scache_t *scp;
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unsigned char *replyWctp;
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smb_packet_t *watch, *lastWatch;
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USHORT fid, watchtree;
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smb_fid_t *fidp;
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cm_scache_t *scp;
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osi_Log0(smb_logp, "SMB3 receive NT cancel");
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osi_Log0(smb_logp, "SMB3 receive NT cancel");
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lock_ObtainMutex(&smb_Dir_Watch_Lock);
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watch = smb_Directory_Watches;
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while (watch) {
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if (((smb_t *)watch)->uid == ((smb_t *)inp)->uid
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&& ((smb_t *)watch)->pid == ((smb_t *)inp)->pid
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&& ((smb_t *)watch)->mid == ((smb_t *)inp)->mid
|
||||
&& ((smb_t *)watch)->tid == ((smb_t *)inp)->tid) {
|
||||
if (watch == smb_Directory_Watches)
|
||||
smb_Directory_Watches = watch->nextp;
|
||||
else
|
||||
lastWatch->nextp = watch->nextp;
|
||||
lock_ReleaseMutex(&smb_Dir_Watch_Lock);
|
||||
lock_ObtainMutex(&smb_Dir_Watch_Lock);
|
||||
watch = smb_Directory_Watches;
|
||||
while (watch) {
|
||||
if (((smb_t *)watch)->uid == ((smb_t *)inp)->uid
|
||||
&& ((smb_t *)watch)->pid == ((smb_t *)inp)->pid
|
||||
&& ((smb_t *)watch)->mid == ((smb_t *)inp)->mid
|
||||
&& ((smb_t *)watch)->tid == ((smb_t *)inp)->tid) {
|
||||
if (watch == smb_Directory_Watches)
|
||||
smb_Directory_Watches = watch->nextp;
|
||||
else
|
||||
lastWatch->nextp = watch->nextp;
|
||||
lock_ReleaseMutex(&smb_Dir_Watch_Lock);
|
||||
|
||||
/* Turn off WATCHED flag in scp */
|
||||
fid = smb_GetSMBParm(watch, 21);
|
||||
watchtree = smb_GetSMBParm(watch, 22) & 0xffff;
|
||||
/* Turn off WATCHED flag in scp */
|
||||
fid = smb_GetSMBParm(watch, 21);
|
||||
watchtree = smb_GetSMBParm(watch, 22) & 0xffff;
|
||||
|
||||
if (vcp != watch->vcp)
|
||||
osi_Log2(smb_logp, "smb_ReceiveNTCancel: vcp %x not equal to watch vcp %x",
|
||||
vcp, watch->vcp);
|
||||
vcp, watch->vcp);
|
||||
|
||||
fidp = smb_FindFID(vcp, fid, 0);
|
||||
fidp = smb_FindFID(vcp, fid, 0);
|
||||
if (fidp) {
|
||||
osi_Log3(smb_logp, "Cancelling change notification for fid %d wtree %d file %s",
|
||||
fid, watchtree,
|
||||
osi_LogSaveString(smb_logp, (fidp)?fidp->NTopen_wholepathp:""));
|
||||
fid, watchtree,
|
||||
osi_LogSaveString(smb_logp, (fidp)?fidp->NTopen_wholepathp:""));
|
||||
|
||||
scp = fidp->scp;
|
||||
lock_ObtainMutex(&scp->mx);
|
||||
@ -6079,28 +6079,28 @@ long smb_ReceiveNTCancel(smb_vc_t *vcp, smb_packet_t *inp, smb_packet_t *outp)
|
||||
osi_Log2(smb_logp,"NTCancel unable to resolve fid [%d] in vcp[%x]", fid,vcp);
|
||||
}
|
||||
|
||||
/* assume STATUS32; return 0xC0000120 (CANCELED) */
|
||||
replyWctp = watch->wctp;
|
||||
*replyWctp++ = 0;
|
||||
*replyWctp++ = 0;
|
||||
*replyWctp++ = 0;
|
||||
((smb_t *)watch)->rcls = 0x20;
|
||||
((smb_t *)watch)->reh = 0x1;
|
||||
((smb_t *)watch)->errLow = 0;
|
||||
((smb_t *)watch)->errHigh = 0xC0;
|
||||
((smb_t *)watch)->flg2 |= 0x4000;
|
||||
smb_SendPacket(vcp, watch);
|
||||
/* assume STATUS32; return 0xC0000120 (CANCELED) */
|
||||
replyWctp = watch->wctp;
|
||||
*replyWctp++ = 0;
|
||||
*replyWctp++ = 0;
|
||||
*replyWctp++ = 0;
|
||||
((smb_t *)watch)->rcls = 0x20;
|
||||
((smb_t *)watch)->reh = 0x1;
|
||||
((smb_t *)watch)->errLow = 0;
|
||||
((smb_t *)watch)->errHigh = 0xC0;
|
||||
((smb_t *)watch)->flg2 |= 0x4000;
|
||||
smb_SendPacket(vcp, watch);
|
||||
if (watch->vcp)
|
||||
smb_ReleaseVC(watch->vcp);
|
||||
smb_FreePacket(watch);
|
||||
return 0;
|
||||
}
|
||||
lastWatch = watch;
|
||||
watch = watch->nextp;
|
||||
}
|
||||
lock_ReleaseMutex(&smb_Dir_Watch_Lock);
|
||||
smb_FreePacket(watch);
|
||||
return 0;
|
||||
}
|
||||
lastWatch = watch;
|
||||
watch = watch->nextp;
|
||||
}
|
||||
lock_ReleaseMutex(&smb_Dir_Watch_Lock);
|
||||
|
||||
return 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
void smb3_Init()
|
||||
|
||||
Loading…
Reference in New Issue
Block a user