[PATCH 6.18 270/641] xdrgen: Fix struct prefix for typedef types in program wrappers

Greg Kroah-Hartman
2026-02-25T01:47:04Z

6.18-stable review patch. If anyone has any objections, please let me know.

------------------

From: Chuck Lever <chuck.lever@oracle.com>

[ Upstream commit bf0fe9ad3d597d8e1378dc9953ca96dfc3addb2b ]

The program templates for decoder/argument.j2 and encoder/result.j2
unconditionally add 'struct' prefix to all types. This is incorrect
when an RPC protocol specification lists a typedef'd basic type or
an enum as a procedure argument or result (e.g., NFSv2's fhandle or
stat), resulting in compiler errors when building generated C code.

Fixes: 4b132aacb076 ("tools: Add xdrgen")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/net/sunrpc/xdrgen/generators/__init__.py | 3 ++-
.../sunrpc/xdrgen/templates/C/program/decoder/argument.j2 | 4 ++++
.../net/sunrpc/xdrgen/templates/C/program/encoder/result.j2 | 6 ++++++
3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/net/sunrpc/xdrgen/generators/__init__.py b/tools/net/sunrpc/xdrgen/generators/__init__.py
index b98574a36a4ac..a2eb6652ac900 100644
--- a/tools/net/sunrpc/xdrgen/generators/__init__.py
+++ b/tools/net/sunrpc/xdrgen/generators/__init__.py
@@ -6,7 +6,7 @@ import sys
from jinja2 import Environment, FileSystemLoader, Template

from xdr_ast import _XdrAst, Specification, _RpcProgram, _XdrTypeSpecifier
-from xdr_ast import public_apis, pass_by_reference, get_header_name
+from xdr_ast import public_apis, pass_by_reference, structs, get_header_name
from xdr_parse import get_xdr_annotate

@@ -22,6 +22,7 @@ def create_jinja2_environment(language: str, xdr_type: str) -> Environment:
environment.globals["annotate"] = get_xdr_annotate()
environment.globals["public_apis"] = public_apis
environment.globals["pass_by_reference"] = pass_by_reference
+ environment.globals["structs"] = structs
return environment
case _:
raise NotImplementedError("Language not supported")
diff --git a/tools/net/sunrpc/xdrgen/templates/C/program/decoder/argument.j2 b/tools/net/sunrpc/xdrgen/templates/C/program/decoder/argument.j2
index 0b1709cca0d4a..19b219dd276d3 100644
--- a/tools/net/sunrpc/xdrgen/templates/C/program/decoder/argument.j2
+++ b/tools/net/sunrpc/xdrgen/templates/C/program/decoder/argument.j2
@@ -14,7 +14,11 @@ bool {{ program }}_svc_decode_{{ argument }}(struct svc_rqst *rqstp, struct xdr_
{% if argument == 'void' %}
return xdrgen_decode_void(xdr);
{% else %}
+{% if argument in structs %}
struct {{ argument }} *argp = rqstp->rq_argp;
+{% else %}
+ {{ argument }} *argp = rqstp->rq_argp;
+{% endif %}

return xdrgen_decode_{{ argument }}(xdr, argp);
{% endif %}
diff --git a/tools/net/sunrpc/xdrgen/templates/C/program/encoder/result.j2 b/tools/net/sunrpc/xdrgen/templates/C/program/encoder/result.j2
index 6fc61a5d47b7f..746592cfda562 100644
--- a/tools/net/sunrpc/xdrgen/templates/C/program/encoder/result.j2
+++ b/tools/net/sunrpc/xdrgen/templates/C/program/encoder/result.j2
@@ -14,8 +14,14 @@ bool {{ program }}_svc_encode_{{ result }}(struct svc_rqst *rqstp, struct xdr_st
{% if result == 'void' %}
return xdrgen_encode_void(xdr);
{% else %}
+{% if result in structs %}
struct {{ result }} *resp = rqstp->rq_resp;

return xdrgen_encode_{{ result }}(xdr, resp);
+{% else %}
+ {{ result }} *resp = rqstp->rq_resp;
+
+ return xdrgen_encode_{{ result }}(xdr, *resp);
+{% endif %}
{% endif %}
}
--
2.51.0