added support for returning the maximal access MXAC tag in SMB2 create

5 files changed, 54 insertions, 5 deletions

diff --git a/source/libcli/raw/interfaces.h b/source/libcli/raw/interfaces.h
index d170006d3b0..19d51893a61 100644
--- a/source/libcli/raw/interfaces.h
+++ b/source/libcli/raw/interfaces.h
@@ -1354,7 +1354,7 @@ union smb_open {
 		break; \
 	} \
 } while (0)
-	/* SMBNTCreateX interface */
+	/* SMBNTCreateX, nttrans and generic interface */
 	struct {
 		enum smb_open_level level;
 		struct {
@@ -1377,6 +1377,9 @@ union smb_open {
 			   NTTRANS varient of the call */
 			struct security_descriptor *sec_desc;
 			struct smb_ea_list *ea_list;
+			
+			/* some optional parameters from the SMB2 varient */
+			bool query_maximal_access;
 		} in;
 		struct {
 			union smb_handle file;
@@ -1392,6 +1395,10 @@ union smb_open {
 			uint16_t file_type;
 			uint16_t ipc_state;
 			uint8_t  is_directory;
+
+			/* optional return values matching SMB2 tagged
+			   values in the call */
+			uint32_t maximal_access;
 		} out;
 	} ntcreatex, nttrans, generic;
 
diff --git a/source/ntvfs/ntvfs_generic.c b/source/ntvfs/ntvfs_generic.c
index 9227295696b..d7057584757 100644
--- a/source/ntvfs/ntvfs_generic.c
+++ b/source/ntvfs/ntvfs_generic.c
@@ -233,6 +233,7 @@ static NTSTATUS ntvfs_map_open_finish(struct ntvfs_module_context *ntvfs,
 		io->smb2.out.size		= io2->generic.out.size;
 		io->smb2.out.file_attr		= io2->generic.out.attrib;
 		io->smb2.out.reserved2		= 0;
+		io->smb2.out.maximal_access     = io2->generic.out.maximal_access;
 		break;
 
 	default:
@@ -522,6 +523,7 @@ NTSTATUS ntvfs_map_open(struct ntvfs_module_context *ntvfs,
 		io2->generic.in.fname		= io->smb2.in.fname;
 		io2->generic.in.sec_desc	= io->smb2.in.sec_desc;
 		io2->generic.in.ea_list		= &io->smb2.in.eas;
+		io2->generic.in.query_maximal_access = io->smb2.in.query_maximal_access; 
 
 		/* we don't support timewarp yet */
 		if (io->smb2.in.timewarp != 0) {
diff --git a/source/ntvfs/posix/pvfs_acl.c b/source/ntvfs/posix/pvfs_acl.c
index 089631a3073..623b1ae5e9a 100644
--- a/source/ntvfs/posix/pvfs_acl.c
+++ b/source/ntvfs/posix/pvfs_acl.c
@@ -807,3 +807,15 @@ NTSTATUS pvfs_acl_inherit(struct pvfs_state *pvfs,
 	
 	return status;
 }
+
+/*
+  return the maximum allowed access mask
+*/
+NTSTATUS pvfs_access_maximal_allowed(struct pvfs_state *pvfs, 
+				     struct ntvfs_request *req,
+				     struct pvfs_filename *name,
+				     uint32_t *maximal_access)
+{
+	*maximal_access = SEC_FLAG_MAXIMUM_ALLOWED;
+	return pvfs_access_check(pvfs, req, name, maximal_access);
+}
diff --git a/source/ntvfs/posix/pvfs_open.c b/source/ntvfs/posix/pvfs_open.c
index a1c55712586..dada9f503f5 100644
--- a/source/ntvfs/posix/pvfs_open.c
+++ b/source/ntvfs/posix/pvfs_open.c
@@ -252,8 +252,12 @@ static NTSTATUS pvfs_open_directory(struct pvfs_state *pvfs,
 	} else {
 		status = pvfs_access_check_create(pvfs, req, name, &access_mask);
 	}
-	if (!NT_STATUS_IS_OK(status)) {
-		return status;
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	if (io->generic.in.query_maximal_access) {
+		status = pvfs_access_maximal_allowed(pvfs, req, name, 
+						     &io->generic.out.maximal_access);
+		NT_STATUS_NOT_OK_RETURN(status);
 	}
 
 	f->ntvfs         = h;
@@ -578,6 +582,12 @@ static NTSTATUS pvfs_create_file(struct pvfs_state *pvfs,
 	status = pvfs_access_check_create(pvfs, req, name, &access_mask);
 	NT_STATUS_NOT_OK_RETURN(status);
 
+	if (io->generic.in.query_maximal_access) {
+		status = pvfs_access_maximal_allowed(pvfs, req, name, 
+						     &io->generic.out.maximal_access);
+		NT_STATUS_NOT_OK_RETURN(status);
+	}
+
 	/* check that the parent isn't opened with delete on close set */
 	status = pvfs_resolve_parent(pvfs, req, name, &parent);
 	if (NT_STATUS_IS_OK(status)) {
@@ -1135,6 +1145,8 @@ NTSTATUS pvfs_open(struct ntvfs_module_context *ntvfs,
 		return ntvfs_map_open(ntvfs, req, io);
 	}
 
+	ZERO_STRUCT(io->generic.out);
+
 	create_options = io->generic.in.create_options;
 	share_access   = io->generic.in.share_access;
 	access_mask    = io->generic.in.access_mask;
@@ -1282,8 +1294,12 @@ NTSTATUS pvfs_open(struct ntvfs_module_context *ntvfs,
 
 	/* check the security descriptor */
 	status = pvfs_access_check(pvfs, req, name, &access_mask);
-	if (!NT_STATUS_IS_OK(status)) {
-		return status;
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	if (io->generic.in.query_maximal_access) {
+		status = pvfs_access_maximal_allowed(pvfs, req, name, 
+						     &io->generic.out.maximal_access);
+		NT_STATUS_NOT_OK_RETURN(status);
 	}
 
 	status = ntvfs_handle_new(pvfs->ntvfs, req, &h);
diff --git a/source/smb_server/smb2/fileio.c b/source/smb_server/smb2/fileio.c
index 086ddc690eb..2c322ea5876 100644
--- a/source/smb_server/smb2/fileio.c
+++ b/source/smb_server/smb2/fileio.c
@@ -36,6 +36,18 @@ static void smb2srv_create_send(struct ntvfs_request *ntvfs)
 	DATA_BLOB blob;
 
 	SMB2SRV_CHECK_ASYNC_STATUS(io, union smb_open);
+
+	/* setup the blobs we should give in the reply */
+	if (io->smb2.out.maximal_access != 0) {
+		uint32_t data[2];
+		SIVAL(data, 0, 0);
+		SIVAL(data, 4, io->smb2.out.maximal_access);
+		SMB2SRV_CHECK(smb2_create_blob_add(req, &io->smb2.out.blobs,
+						   SMB2_CREATE_TAG_MXAC, 
+						   data_blob_const(data, 8)));
+	}
+	
+
 	SMB2SRV_CHECK(smb2_create_blob_push(req, &blob, io->smb2.out.blobs));
 	SMB2SRV_CHECK(smb2srv_setup_reply(req, 0x58, true, blob.length));