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NFSD: Add nfsd4_encode_open_read_delegation4()

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Refactor nfsd4_encode_open() so the open_read_delegation4 type is
encoded in a separate function. This makes it more straightforward
to later add support for returning an nfsace4 in OPEN responses that
offer a delegation.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever
2023-09-29 09:59:05 -04:00
parent c564178290
commit e4ad7ce775
3 changed files with 49 additions and 20 deletions
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61
fs/nfsd/nfs4xdr.c
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@@ -4078,6 +4078,49 @@ nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr,
return nfsd4_encode_change_info4(xdr, &link->li_cinfo);
}
/*
* This implementation does not yet support returning an ACE in an
* OPEN that offers a delegation.
*/
static __be32
nfsd4_encode_open_nfsace4(struct xdr_stream *xdr)
{
__be32 status;
/* type */
status = nfsd4_encode_acetype4(xdr, NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
if (status != nfs_ok)
return nfserr_resource;
/* flag */
status = nfsd4_encode_aceflag4(xdr, 0);
if (status != nfs_ok)
return nfserr_resource;
/* access mask */
status = nfsd4_encode_acemask4(xdr, 0);
if (status != nfs_ok)
return nfserr_resource;
/* who - empty for now */
if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
return nfserr_resource;
return nfs_ok;
}
static __be32
nfsd4_encode_open_read_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open)
{
__be32 status;
/* stateid */
status = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid);
if (status != nfs_ok)
return status;
/* recall */
status = nfsd4_encode_bool(xdr, open->op_recall);
if (status != nfs_ok)
return status;
/* permissions */
return nfsd4_encode_open_nfsace4(xdr);
}
static __be32
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr,
@@ -4110,22 +4153,8 @@ nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr,
case NFS4_OPEN_DELEGATE_NONE:
break;
case NFS4_OPEN_DELEGATE_READ:
nfserr = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid);
if (nfserr)
return nfserr;
p = xdr_reserve_space(xdr, 20);
if (!p)
return nfserr_resource;
*p++ = cpu_to_be32(open->op_recall);
/*
* TODO: ACE's in delegations
*/
*p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
*p++ = cpu_to_be32(0);
*p++ = cpu_to_be32(0);
*p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
break;
/* read */
return nfsd4_encode_open_read_delegation4(xdr, open);
case NFS4_OPEN_DELEGATE_WRITE:
nfserr = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid);
if (nfserr)