linux-kernel - [PATCH 1/8] smb: Update comments about some reparse point tags

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240928215948.4494-2-pali@kernel.org>
Date: Sat, 28 Sep 2024 23:59:41 +0200
From: Pali Rohár <pali@...nel.org>
To: Steve French <sfrench@...ba.org>,
	Paulo Alcantara <pc@...guebit.com>,
	Ronnie Sahlberg <ronniesahlberg@...il.com>
Cc: linux-cifs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/8] smb: Update comments about some reparse point tags

NFS-style reparse points are recognized only by the Windows NFS server 2012
and new. Windows 8 does not contain Windows NFS server, so these reparse
points are not used on Windows 8.

Reparse points with IO_REPARSE_TAG_AF_UNIX tag were primarily introduced for
native Win32 AF_UNIX sockets and later were re-used by also by WSL:
https://devblogs.microsoft.com/commandline/af_unix-comes-to-windows/
https://devblogs.microsoft.com/commandline/windowswsl-interop-with-af_unix/

Signed-off-by: Pali Rohár <pali@...nel.org>
---
 fs/smb/common/smbfsctl.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/smb/common/smbfsctl.h b/fs/smb/common/smbfsctl.h
index a94d658b88e8..4b379e84c46b 100644
--- a/fs/smb/common/smbfsctl.h
+++ b/fs/smb/common/smbfsctl.h
@@ -140,20 +140,21 @@
 /* Used by the DFS filter See MS-DFSC */
 #define IO_REPARSE_TAG_DFSR          0x80000012
 #define IO_REPARSE_TAG_FILTER_MANAGER 0x8000000B
-/* See section MS-FSCC 2.1.2.4 */
+/* Native SMB symlinks since Windows Vista, see MS-FSCC 2.1.2.4 */
 #define IO_REPARSE_TAG_SYMLINK       0xA000000C
 #define IO_REPARSE_TAG_DEDUP         0x80000013
 #define IO_REPARSE_APPXSTREAM	     0xC0000014
-/* NFS symlinks, Win 8/SMB3 and later */
+/* NFS special files used by Windows NFS server since Windows Server 2012, see MS-FSCC 2.1.2.6 */
 #define IO_REPARSE_TAG_NFS           0x80000014
 /*
  * AzureFileSync - see
  * https://docs.microsoft.com/en-us/azure/storage/files/storage-sync-cloud-tiering
  */
 #define IO_REPARSE_TAG_AZ_FILE_SYNC  0x8000001e
+/* Native Win32 AF_UNIX sockets since Windows 10 April 2018 Update, used also by WSL */
+#define IO_REPARSE_TAG_AF_UNIX       0x80000023
 /* WSL reparse tags */
 #define IO_REPARSE_TAG_LX_SYMLINK    0xA000001D
-#define IO_REPARSE_TAG_AF_UNIX	     0x80000023
 #define IO_REPARSE_TAG_LX_FIFO	     0x80000024
 #define IO_REPARSE_TAG_LX_CHR	     0x80000025
 #define IO_REPARSE_TAG_LX_BLK	     0x80000026
-- 
2.20.1