Extend the `gen_smb1_mapping` script to support generating sorted POSIX
error mapping tables for both ERRDOS and ERRSRV classes at compile time.

The script parses annotations from smberr.h to generate smb1_err_dos_map.c
and smb1_err_srv_map.c, which are included as the contents of the arrays
mapping_table_ERRDOS[] and mapping_table_ERRSRV[], respectively.

This ensures that the mapping logic remains synchronized with the source
headers and prepares for faster error lookups using binary search in the
future.

Signed-off-by: Huiwen He <hehuiwen@kylinos.cn>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>

Introduce `gen_smb1_mapping` script to autogenerate the NT status to
DOS error mapping table for SMB1. This script parses nterr.h to
generate smb1_mapping_table.c, which is then directly included as
the content of the ntstatus_to_dos_map[] array at compile time.

The generated array is numerically sorted during the build process to
ensure a consistent structure, providing the necessary groundwork for
future introduction of binary search lookups.

Signed-off-by: Huiwen He <hehuiwen@kylinos.cn>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>

The smb client code recently started generating the error mapping table
from a common header, but didn't tell git about it, so then git ends up
thinking maybe it should be committed.

Let's fix that.

Fixes: c527e13a7a66 ("cifs: Autogenerate SMB2 error mapping table")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>