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NFSD: Update the NFSv3 PATHCONF3res encoder to use struct xdr_stream

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Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-11-06 13:15:09 -05:00
parent 0a139d1b7f
commit ded04a587f
2 changed files with 49 additions and 13 deletions
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44
fs/nfsd/nfs3xdr.c
View file

@ -1501,25 +1501,47 @@ nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p)
return 1;
}
static bool
svcxdr_encode_pathconf3resok(struct xdr_stream *xdr,
const struct nfsd3_pathconfres *resp)
{
__be32 *p;
p = xdr_reserve_space(xdr, XDR_UNIT * 6);
if (!p)
return false;
*p++ = cpu_to_be32(resp->p_link_max);
*p++ = cpu_to_be32(resp->p_name_max);
p = xdr_encode_bool(p, resp->p_no_trunc);
p = xdr_encode_bool(p, resp->p_chown_restricted);
p = xdr_encode_bool(p, resp->p_case_insensitive);
xdr_encode_bool(p, resp->p_case_preserving);
return true;
}
/* PATHCONF */
int
nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p)
{
struct xdr_stream *xdr = &rqstp->rq_res_stream;
struct nfsd3_pathconfres *resp = rqstp->rq_resp;
*p++ = resp->status;
*p++ = xdr_zero; /* no post_op_attr */
if (resp->status == 0) {
*p++ = htonl(resp->p_link_max);
*p++ = htonl(resp->p_name_max);
*p++ = htonl(resp->p_no_trunc);
*p++ = htonl(resp->p_chown_restricted);
*p++ = htonl(resp->p_case_insensitive);
*p++ = htonl(resp->p_case_preserving);
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_pathconf3resok(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;
}
/* COMMIT */

18
include/linux/sunrpc/xdr.h
View file

@ -395,7 +395,21 @@ static inline int xdr_stream_encode_item_absent(struct xdr_stream *xdr)
}
/**
* xdr_stream_encode_bool - Encode a "not present" list item
* xdr_encode_bool - Encode a boolean item
* @p: address in a buffer into which to encode
* @n: boolean value to encode
*
* Return value:
* Address of item following the encoded boolean
*/
static inline __be32 *xdr_encode_bool(__be32 *p, u32 n)
{
*p = n ? xdr_one : xdr_zero;
return p++;
}
/**
* xdr_stream_encode_bool - Encode a boolean item
* @xdr: pointer to xdr_stream
* @n: boolean value to encode
*
@ -410,7 +424,7 @@ static inline int xdr_stream_encode_bool(struct xdr_stream *xdr, __u32 n)
if (unlikely(!p))
return -EMSGSIZE;
*p = n ? xdr_one : xdr_zero;
xdr_encode_bool(p, n);
return len;
}