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4b132aacb0
Add a Python-based tool for translating XDR specifications into XDR encoder and decoder functions written in the Linux kernel's C coding style. The generator attempts to match the usual C coding style of the Linux kernel's SunRPC consumers. This approach is similar to the netlink code generator in tools/net/ynl . The maintainability benefits of machine-generated XDR code include: - Stronger type checking - Reduces the number of bugs introduced by human error - Makes the XDR code easier to audit and analyze - Enables rapid prototyping of new RPC-based protocols - Hardens the layering between protocol logic and marshaling - Makes it easier to add observability on demand - Unit tests might be built for both the tool and (automatically) for the generated code In addition, converting the XDR layer to use memory-safe languages such as Rust will be easier if much of the code can be converted automatically. Tested-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
23 lines
534 B
Django/Jinja
23 lines
534 B
Django/Jinja
{# SPDX-License-Identifier: GPL-2.0 #}
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{% if annotate %}
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/* Decode {{ result }} results */
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{% endif %}
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static int {{ program }}_xdr_dec_{{ result }}(struct rpc_rqst *req,
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struct xdr_stream *xdr, void *data)
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{
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{% if result == 'void' %}
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xdrgen_decode_void(xdr);
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{% else %}
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struct {{ result }} *result = data;
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if (!xdrgen_decode_{{ result }}(xdr, result))
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return -EIO;
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if (result->stat != nfs_ok) {
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trace_nfs_xdr_status(xdr, (int)result->stat);
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return {{ program }}_stat_to_errno(result->stat);
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}
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{% endif %}
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return 0;
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}
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