2013/5/23 Jeff Layton <[email protected]>:
> Signed-off-by: Jeff Layton <[email protected]>
> ---
>  fs/cifs/cifssmb.c | 25 ++++++++++++++++---------
>  1 file changed, 16 insertions(+), 9 deletions(-)
>
> diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
> index 5b191f7..e7184b9 100644
> --- a/fs/cifs/cifssmb.c
> +++ b/fs/cifs/cifssmb.c
> @@ -539,6 +539,20 @@ decode_lanman_negprot_rsp(struct TCP_Server_Info 
> *server, NEGOTIATE_RSP *pSMBr,
>  }
>  #endif
>
> +static bool
> +should_set_ext_sec_flag(unsigned int secFlags)
> +{
> +       if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
> +               return true;
> +       else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5)
> +               return true;
> +       else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
> +               return true;
> +       else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP)
> +               return true;
> +       return false;
> +}
> +
>  int
>  CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
>  {
> @@ -572,15 +586,8 @@ CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses 
> *ses)
>         pSMB->hdr.Mid = get_next_mid(server);
>         pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
>
> -       if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
> -               pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
> -       else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5) {
> -               cifs_dbg(FYI, "Kerberos only mechanism, enable extended 
> security\n");
> -               pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
> -       } else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
> -               pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
> -       else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP) {
> -               cifs_dbg(FYI, "NTLMSSP only mechanism, enable extended 
> security\n");
> +       if (should_set_ext_sec_flag(secFlags)) {
> +               cifs_dbg(FYI, "Requesting extended security.");
>                 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
>         }
>
> --
> 1.8.1.4
>
> --
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Reviewed-by: Pavel Shilovsky <[email protected]>

--
Best regards,
Pavel Shilovsky.
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