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symlink: driver calls RxPrepareToReparseSymbolicLink

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on ERROR_REPARSE, nfs41_Create() generates an absolute path for the symlink target using the format "DeviceName+NetRootName+symlink", and calls RxPrepareToReparseSymbolicLink()

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2010-10-12 10:01:40 -04:00
parent 74a704120b
commit d136756272
1 changed files with 42 additions and 0 deletions
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42
sys/nfs41_driver.c
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@ -2570,6 +2570,48 @@ NTSTATUS nfs41_Create(
goto out; goto out;
} }
if (entry->errno == ERROR_REPARSE) {
/* symbolic link handling. when attempting to open a symlink when the
* FILE_OPEN_REPARSE_POINT flag is not set, replace the filename with
* the symlink target's by calling RxPrepareToReparseSymbolicLink()
* and returning STATUS_REPARSE. the object manager will attempt to
* open the new path, and return its handle for the original open */
PMRX_NET_ROOT NetRoot = RxContext->pRelevantSrvOpen->pVNetRoot->pNetRoot;
PRDBSS_DEVICE_OBJECT DeviceObject = NetRoot->pSrvCall->RxDeviceObject;
UNICODE_STRING AbsPath;
PCHAR buf;
BOOLEAN ReparseRequired;
/* allocate the string for RxPrepareToReparseSymbolicLink(), and
* format an absolute path "DeviceName+NetRootName+symlink" */
AbsPath.Length = DeviceObject->DeviceName.Length +
NetRoot->pNetRootName->Length + entry->u.Open.symlink.Length;
AbsPath.MaximumLength = AbsPath.Length + sizeof(WCHAR);
AbsPath.Buffer = RxAllocatePoolWithTag(NonPagedPool,
AbsPath.MaximumLength, NFS41_MM_POOLTAG);
if (AbsPath.Buffer == NULL) {
status = STATUS_INSUFFICIENT_RESOURCES;
goto out_free;
}
buf = (PCHAR)AbsPath.Buffer;
RtlCopyMemory(buf, DeviceObject->DeviceName.Buffer, DeviceObject->DeviceName.Length);
buf += DeviceObject->DeviceName.Length;
RtlCopyMemory(buf, NetRoot->pNetRootName->Buffer, NetRoot->pNetRootName->Length);
buf += NetRoot->pNetRootName->Length;
RtlCopyMemory(buf, entry->u.Open.symlink.Buffer, entry->u.Open.symlink.Length);
status = RxPrepareToReparseSymbolicLink(RxContext,
FALSE, &AbsPath, TRUE, &ReparseRequired);
DbgP("RxPrepareToReparseSymbolicLink('%wZ') returned %08lX, "
"FileName is '%wZ'\n",
&AbsPath, status, &RxContext->CurrentIrpSp->FileObject->FileName);
if (status == STATUS_SUCCESS)
status = ReparseRequired ? STATUS_REPARSE :
STATUS_OBJECT_PATH_NOT_FOUND;
goto out_free;
}
status = map_open_errors(entry->status, SrvOpen->pAlreadyPrefixedName->Length); status = map_open_errors(entry->status, SrvOpen->pAlreadyPrefixedName->Length);
if (status != STATUS_SUCCESS) { if (status != STATUS_SUCCESS) {
print_open_error(1, entry->status); print_open_error(1, entry->status);