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NFSD: Update the NFSv3 FSINFO3res encoder to use struct xdr_stream 

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-10-22 13:42:13 -04:00
parent 8b7044984f
commit 0a139d1b7f
1 changed files with 46 additions and 16 deletions
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62
fs/nfsd/nfs3xdr.c
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@ -24,6 +24,15 @@ static const struct svc_fh nfs3svc_null_fh = {
.fh_no_wcc = true,
};
/*
* time_delta. {1, 0} means the server is accurate only
* to the nearest second.
*/
static const struct timespec64 nfs3svc_time_delta = {
.tv_sec = 1,
.tv_nsec = 0,
};
/*
* Mapping of S_IF* types to NFS file types
*/
@ -1445,30 +1454,51 @@ nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p)
return 1;
}
static bool
svcxdr_encode_fsinfo3resok(struct xdr_stream *xdr,
const struct nfsd3_fsinfores *resp)
{
__be32 *p;
p = xdr_reserve_space(xdr, XDR_UNIT * 12);
if (!p)
return false;
*p++ = cpu_to_be32(resp->f_rtmax);
*p++ = cpu_to_be32(resp->f_rtpref);
*p++ = cpu_to_be32(resp->f_rtmult);
*p++ = cpu_to_be32(resp->f_wtmax);
*p++ = cpu_to_be32(resp->f_wtpref);
*p++ = cpu_to_be32(resp->f_wtmult);
*p++ = cpu_to_be32(resp->f_dtpref);
p = xdr_encode_hyper(p, resp->f_maxfilesize);
p = encode_nfstime3(p, &nfs3svc_time_delta);
*p = cpu_to_be32(resp->f_properties);
return true;
}
/* FSINFO */
int
nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p)
{
struct xdr_stream *xdr = &rqstp->rq_res_stream;
struct nfsd3_fsinfores *resp = rqstp->rq_resp;
*p++ = resp->status;
*p++ = xdr_zero; /* no post_op_attr */
if (resp->status == 0) {
*p++ = htonl(resp->f_rtmax);
*p++ = htonl(resp->f_rtpref);
*p++ = htonl(resp->f_rtmult);
*p++ = htonl(resp->f_wtmax);
*p++ = htonl(resp->f_wtpref);
*p++ = htonl(resp->f_wtmult);
*p++ = htonl(resp->f_dtpref);
p = xdr_encode_hyper(p, resp->f_maxfilesize);
*p++ = xdr_one;
*p++ = xdr_zero;
*p++ = htonl(resp->f_properties);
if (!svcxdr_encode_nfsstat3(xdr, resp->status))
return 0;
switch (resp->status) {
case nfs_ok:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
return 0;
if (!svcxdr_encode_fsinfo3resok(xdr, resp))
return 0;
break;
default:
if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
return 0;
}
return xdr_ressize_check(rqstp, p);
return 1;
}
/* PATHCONF */