smb3: add support for stat of WSL reparse points for special file types
This is needed so when mounting to Windows we do not misinterpret various special files created by Linux (WSL) as symlinks. An earlier patch addressed readdir. This patch fixes stat (getattr). With this patch: File: /mnt1/char Size: 0 Blocks: 0 IO Block: 16384 character special file Device: 34h/52d Inode: 844424930132069 Links: 1 Device type: 0,0 Access: (0755/crwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2020-10-21 17:46:51.839458900 -0500 Modify: 2020-10-21 17:46:51.839458900 -0500 Change: 2020-10-21 18:30:39.797358800 -0500 Birth: - File: /mnt1/fifo Size: 0 Blocks: 0 IO Block: 16384 fifo Device: 34h/52d Inode: 1125899906842722 Links: 1 Access: (0755/prwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2020-10-21 16:21:37.259249700 -0500 Modify: 2020-10-21 16:21:37.259249700 -0500 Change: 2020-10-21 18:30:39.797358800 -0500 Birth: - File: /mnt1/block Size: 0 Blocks: 0 IO Block: 16384 block special file Device: 34h/52d Inode: 844424930132068 Links: 1 Device type: 0,0 Access: (0755/brwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2020-10-21 17:10:47.913103200 -0500 Modify: 2020-10-21 17:10:47.913103200 -0500 Change: 2020-10-21 18:30:39.796725500 -0500 Birth: - without the patch all show up incorrectly as symlinks with annoying "operation not supported error also returned" File: /mnt1/charstat: cannot read symbolic link '/mnt1/char': Operation not supported Size: 0 Blocks: 0 IO Block: 16384 symbolic link Device: 34h/52d Inode: 844424930132069 Links: 1 Access: (0000/l---------) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2020-10-21 17:46:51.839458900 -0500 Modify: 2020-10-21 17:46:51.839458900 -0500 Change: 2020-10-21 18:30:39.797358800 -0500 Birth: - File: /mnt1/fifostat: cannot read symbolic link '/mnt1/fifo': Operation not supported Size: 0 Blocks: 0 IO Block: 16384 symbolic link Device: 34h/52d Inode: 1125899906842722 Links: 1 Access: (0000/l---------) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2020-10-21 16:21:37.259249700 -0500 Modify: 2020-10-21 16:21:37.259249700 -0500 Change: 2020-10-21 18:30:39.797358800 -0500 Birth: - File: /mnt1/blockstat: cannot read symbolic link '/mnt1/block': Operation not supported Size: 0 Blocks: 0 IO Block: 16384 symbolic link Device: 34h/52d Inode: 844424930132068 Links: 1 Access: (0000/l---------) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2020-10-21 17:10:47.913103200 -0500 Modify: 2020-10-21 17:10:47.913103200 -0500 Change: 2020-10-21 18:30:39.796725500 -0500 Signed-off-by:Steve French <stfrench@microsoft.com> Reviewed-by: