tree 7a4480897728404002b2a388f6f4245c902e90b4
parent d819d298c7258849d56eb400be436aff3ba2aae2
author Paulo Alcantara <paulo@paulo.ac> 1529068964 -0300
committer Steve French <stfrench@microsoft.com> 1529108260 -0500

cifs: Use correct packet length in SMB2_TRANSFORM header

In smb3_init_transform_rq(), 'orig_len' was only counting the request
length, but forgot to count any data pages in the request.

Writing or creating files with the 'seal' mount option was broken.

In addition, do some code refactoring by exporting smb2_rqst_len() to
calculate the appropriate packet size and avoid duplicating the same
calculation all over the code.

The start of the io vector is either the rfc1002 length (4 bytes) or a
SMB2 header which is always > 4. Use this fact to check and skip the
rfc1002 length if requested.

Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>