From 5c266df52701635edfd49415b225fb17ceac5183 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 2 Mar 2020 15:02:20 -0500 Subject: SUNRPC: Add encoders for list item discriminators Clean up. These are taken from the client-side RPC/RDMA transport to a more global header file so they can be used elsewhere. Signed-off-by: Chuck Lever --- include/linux/sunrpc/xdr.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'include/linux') diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index 83cd9f15c526..9c8b73b509a1 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -315,6 +315,44 @@ static inline size_t xdr_pad_size(size_t n) return xdr_align_size(n) - n; } +/** + * xdr_stream_encode_item_present - Encode a "present" list item + * @xdr: pointer to xdr_stream + * + * Return values: + * On success, returns length in bytes of XDR buffer consumed + * %-EMSGSIZE on XDR buffer overflow + */ +static inline ssize_t xdr_stream_encode_item_present(struct xdr_stream *xdr) +{ + const size_t len = sizeof(__be32); + __be32 *p = xdr_reserve_space(xdr, len); + + if (unlikely(!p)) + return -EMSGSIZE; + *p = xdr_one; + return len; +} + +/** + * xdr_stream_encode_item_absent - Encode a "not present" list item + * @xdr: pointer to xdr_stream + * + * Return values: + * On success, returns length in bytes of XDR buffer consumed + * %-EMSGSIZE on XDR buffer overflow + */ +static inline int xdr_stream_encode_item_absent(struct xdr_stream *xdr) +{ + const size_t len = sizeof(__be32); + __be32 *p = xdr_reserve_space(xdr, len); + + if (unlikely(!p)) + return -EMSGSIZE; + *p = xdr_zero; + return len; +} + /** * xdr_stream_encode_u32 - Encode a 32-bit integer * @xdr: pointer to xdr_stream -- cgit v1.2.3