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SUNRPC: Define rpcsec_gss_info structure

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The NFSv4 SECINFO procedure returns a list of security flavors.  Any
GSS flavor also has a GSS tuple containing an OID, a quality-of-
protection value, and a service value, which specifies a particular
GSS pseudoflavor.

For simplicity and efficiency, I'd like to return each GSS tuple
from the NFSv4 SECINFO XDR decoder and pass it straight into the RPC
client.

Define a data structure that is visible to both the NFS client and
the RPC client.  Take structure and field names from the relevant
standards to avoid confusion.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
2013-03-16 15:54:34 -04:00
committed by Trond Myklebust
parent 72f4dc117b
commit fb15b26f8b
5 changed files with 36 additions and 34 deletions
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21
fs/nfs/nfs4xdr.c
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@@ -5205,27 +5205,30 @@ static int decode_delegreturn(struct xdr_stream *xdr)
return decode_op_hdr(xdr, OP_DELEGRETURN);
}
static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
static int decode_secinfo_gss(struct xdr_stream *xdr,
struct nfs4_secinfo4 *flavor)
{
u32 oid_len;
__be32 *p;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
flavor->gss.sec_oid4.len = be32_to_cpup(p);
if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
oid_len = be32_to_cpup(p);
if (oid_len > GSS_OID_MAX_LEN)
goto out_err;
p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
p = xdr_inline_decode(xdr, oid_len);
if (unlikely(!p))
goto out_overflow;
memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
memcpy(flavor->flavor_info.oid.data, p, oid_len);
flavor->flavor_info.oid.len = oid_len;
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
flavor->gss.qop4 = be32_to_cpup(p++);
flavor->gss.service = be32_to_cpup(p);
flavor->flavor_info.qop = be32_to_cpup(p++);
flavor->flavor_info.service = be32_to_cpup(p);
return 0;
@@ -5238,10 +5241,10 @@ out_err:
static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
{
struct nfs4_secinfo_flavor *sec_flavor;
struct nfs4_secinfo4 *sec_flavor;
unsigned int i, num_flavors;
int status;
__be32 *p;
int i, num_flavors;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))