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[CIFS] Readpages and readir performance improvements - eliminate extra

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memcpy.  Part 1

Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
2005-12-02 13:32:45 -08:00
parent bf82067917
commit 84afc29b18
6 changed files with 71 additions and 23 deletions
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55
fs/cifs/cifsencrypt.c
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@@ -1,7 +1,7 @@
/*
* fs/cifs/cifsencrypt.c
*
* Copyright (C) International Business Machines Corp., 2003
* Copyright (C) International Business Machines Corp., 2005
* Author(s): Steve French (sfrench@us.ibm.com)
*
* This library is free software; you can redistribute it and/or modify
@@ -82,6 +82,59 @@ int cifs_sign_smb(struct smb_hdr * cifs_pdu, struct TCP_Server_Info * server,
return rc;
}
static int cifs_calc_signature2(const struct kvec * iov, int n_vec,
const char * key, char * signature)
{
struct MD5Context context;
if((iov == NULL) || (signature == NULL))
return -EINVAL;
MD5Init(&context);
MD5Update(&context,key,CIFS_SESSION_KEY_SIZE+16);
/* MD5Update(&context,cifs_pdu->Protocol,cifs_pdu->smb_buf_length); */ /* BB FIXME BB */
MD5Final(signature,&context);
return -EOPNOTSUPP;
/* return 0; */
}
int cifs_sign_smb2(struct kvec * iov, int n_vec, struct TCP_Server_Info *server,
__u32 * pexpected_response_sequence_number)
{
int rc = 0;
char smb_signature[20];
struct smb_hdr * cifs_pdu = iov[0].iov_base;
if((cifs_pdu == NULL) || (server == NULL))
return -EINVAL;
if((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0)
return rc;
spin_lock(&GlobalMid_Lock);
cifs_pdu->Signature.Sequence.SequenceNumber =
cpu_to_le32(server->sequence_number);
cifs_pdu->Signature.Sequence.Reserved = 0;
*pexpected_response_sequence_number = server->sequence_number++;
server->sequence_number++;
spin_unlock(&GlobalMid_Lock);
rc = cifs_calc_signature2(iov, n_vec, server->mac_signing_key,
smb_signature);
if(rc)
memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
else
memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8);
return rc;
}
int cifs_verify_signature(struct smb_hdr * cifs_pdu, const char * mac_key,
__u32 expected_sequence_number)
{