From: Samuel Cabrero <scabrero@samba.org>
Date: Fri, 14 Feb 2025 16:07:14 +0000 (+0100)
Subject: vfs: Add VFS_OPEN_HOW_RESOLVE_NO_XDEV flag
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aac78b2142392a212e5b047225d50612da82a953;p=thirdparty%2Fsamba.git

vfs: Add VFS_OPEN_HOW_RESOLVE_NO_XDEV flag

It disallows traversal of mount points during path resolution, including bind
mounts.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15805

Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
---

diff --git a/source3/include/vfs.h b/source3/include/vfs.h
index e99d84e36f8..5f38a7c5424 100644
--- a/source3/include/vfs.h
+++ b/source3/include/vfs.h
@@ -933,6 +933,7 @@ struct vfs_aio_state {
 
 #define VFS_OPEN_HOW_RESOLVE_NO_SYMLINKS 1
 #define VFS_OPEN_HOW_WITH_BACKUP_INTENT 2
+#define VFS_OPEN_HOW_RESOLVE_NO_XDEV 4
 
 struct vfs_open_how {
 	int flags;