s3:vfs: add SMB_VFS_READDIR_ATTR()

SMB_VFS_READDIR_ATTR is a last minute hook to fetch additional metadata
for a directory entry when we're already marshalling the SMB reply
buffer.

This would be used, when there's a need to repurpose some fields in the
the reply, like it's done with Apple's SMB2 extension "AAPL".

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/source3/lib/readdir_attr.h b/source3/lib/readdir_attr.h
new file mode 100644
index 0000000000..d2a814dba3
--- /dev/null
+++ b/source3/lib/readdir_attr.h
@@ -0,0 +1,37 @@
+/*
+ * Fetch filesystem metadata in readdir/marshall context
+ *
+ * Copyright (C) Ralph Boehme 2014
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _READDIR_ATTR_H
+#define _READDIR_ATTR_H
+
+enum readdir_attr_type {RDATTR_NONE, RDATTR_AAPL};
+
+struct readdir_attr_data {
+	enum readdir_attr_type type;
+	union attr_data {
+		struct aapl {
+			uint64_t rfork_size;
+			char finder_info[16];
+			uint32_t max_access;
+			mode_t unix_mode;
+		} aapl;
+	} attr_data;
+};
+
+#endif	/* _READDIR_ATTR_H */