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SUNRPC: Add a helper for encoding opaque data inline

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Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2018-03-20 17:03:06 -04:00 committed by Anna Schumaker
parent 0e779aa703
commit 85e3dd44c5
1 changed files with 25 additions and 0 deletions
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25
include/linux/sunrpc/xdr.h
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@ -318,6 +318,31 @@ xdr_stream_encode_u64(struct xdr_stream *xdr, __u64 n)
return len;
}
/**
* xdr_stream_encode_opaque_inline - Encode opaque xdr data
* @xdr: pointer to xdr_stream
* @ptr: pointer to void pointer
* @len: size of object
*
* Return values:
* On success, returns length in bytes of XDR buffer consumed
* %-EMSGSIZE on XDR buffer overflow
*/
static inline ssize_t
xdr_stream_encode_opaque_inline(struct xdr_stream *xdr, void **ptr, size_t len)
{
size_t count = sizeof(__u32) + xdr_align_size(len);
__be32 *p = xdr_reserve_space(xdr, count);
if (unlikely(!p)) {
*ptr = NULL;
return -EMSGSIZE;
}
xdr_encode_opaque(p, NULL, len);
*ptr = ++p;
return count;
}
/**
* xdr_stream_encode_opaque_fixed - Encode fixed length opaque xdr data
* @xdr: pointer to xdr_stream