s3: Move can_set_delete_on_close to smbd/

2 files changed, 60 insertions, 0 deletions

diff --git a/source3/smbd/file_access.c b/source3/smbd/file_access.c
index 4a473d76a6..9fff8e3051 100644
--- a/source3/smbd/file_access.c
+++ b/source3/smbd/file_access.c
@@ -170,3 +170,62 @@ bool directory_has_default_acl(connection_struct *conn, const char *fname)
 	TALLOC_FREE(secdesc);
 	return false;
 }
+
+/****************************************************************************
+ Check if setting delete on close is allowed on this fsp.
+****************************************************************************/
+
+NTSTATUS can_set_delete_on_close(files_struct *fsp, uint32 dosmode)
+{
+	/*
+	 * Only allow delete on close for writable files.
+	 */
+
+	if ((dosmode & FILE_ATTRIBUTE_READONLY) &&
+	    !lp_delete_readonly(SNUM(fsp->conn))) {
+		DEBUG(10,("can_set_delete_on_close: file %s delete on close "
+			  "flag set but file attribute is readonly.\n",
+			  fsp_str_dbg(fsp)));
+		return NT_STATUS_CANNOT_DELETE;
+	}
+
+	/*
+	 * Only allow delete on close for writable shares.
+	 */
+
+	if (!CAN_WRITE(fsp->conn)) {
+		DEBUG(10,("can_set_delete_on_close: file %s delete on "
+			  "close flag set but write access denied on share.\n",
+			  fsp_str_dbg(fsp)));
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	/*
+	 * Only allow delete on close for files/directories opened with delete
+	 * intent.
+	 */
+
+	if (!(fsp->access_mask & DELETE_ACCESS)) {
+		DEBUG(10,("can_set_delete_on_close: file %s delete on "
+			  "close flag set but delete access denied.\n",
+			  fsp_str_dbg(fsp)));
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	/* Don't allow delete on close for non-empty directories. */
+	if (fsp->is_directory) {
+		SMB_ASSERT(!is_ntfs_stream_smb_fname(fsp->fsp_name));
+
+		/* Or the root of a share. */
+		if (ISDOT(fsp->fsp_name->base_name)) {
+			DEBUG(10,("can_set_delete_on_close: can't set delete on "
+				  "close for the root of a share.\n"));
+			return NT_STATUS_ACCESS_DENIED;
+		}
+
+		return can_delete_directory(fsp->conn,
+					    fsp->fsp_name->base_name);
+	}
+
+	return NT_STATUS_OK;
+}
diff --git a/source3/smbd/proto.h b/source3/smbd/proto.h
index e0f48b7bcb..34b252006b 100644
--- a/source3/smbd/proto.h
+++ b/source3/smbd/proto.h
@@ -310,6 +310,7 @@ bool can_delete_file_in_directory(connection_struct *conn,
 bool can_write_to_file(connection_struct *conn,
 		       const struct smb_filename *smb_fname);
 bool directory_has_default_acl(connection_struct *conn, const char *fname);
+NTSTATUS can_set_delete_on_close(files_struct *fsp, uint32 dosmode);
 
 /* The following definitions come from smbd/fileio.c  */