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smb: Update comments about some reparse point tags

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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@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Pali Rohár 2024-09-28 23:59:41 +02:00 committed by Steve French
parent a9023656bc
commit dd0d7edb86
1 changed files with 4 additions and 3 deletions
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7
fs/smb/common/smbfsctl.h
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@ -140,20 +140,21 @@
/* Used by the DFS filter See MS-DFSC */ /* Used by the DFS filter See MS-DFSC */
#define IO_REPARSE_TAG_DFSR 0x80000012 #define IO_REPARSE_TAG_DFSR 0x80000012
#define IO_REPARSE_TAG_FILTER_MANAGER 0x8000000B #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_SYMLINK 0xA000000C
#define IO_REPARSE_TAG_DEDUP 0x80000013 #define IO_REPARSE_TAG_DEDUP 0x80000013
#define IO_REPARSE_APPXSTREAM 0xC0000014 #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 #define IO_REPARSE_TAG_NFS 0x80000014
/* /*
* AzureFileSync - see * AzureFileSync - see
* https://docs.microsoft.com/en-us/azure/storage/files/storage-sync-cloud-tiering * https://docs.microsoft.com/en-us/azure/storage/files/storage-sync-cloud-tiering
*/ */
#define IO_REPARSE_TAG_AZ_FILE_SYNC 0x8000001e #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 */ /* WSL reparse tags */
#define IO_REPARSE_TAG_LX_SYMLINK 0xA000001D #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_FIFO 0x80000024
#define IO_REPARSE_TAG_LX_CHR 0x80000025 #define IO_REPARSE_TAG_LX_CHR 0x80000025
#define IO_REPARSE_TAG_LX_BLK 0x80000026 #define IO_REPARSE_TAG_LX_BLK 0x80000026