xdrgen: Add generator code for XDR width macros

2024-11-11T18:42:05Z

Introduce logic in the code generators to emit maxsize (XDR width) definitions. In C, these are pre-processor macros. Signed-off-by: Chuck Lever

xdrgen: Rename "variable-length strings"

2024-11-11T18:41:59Z

I misread RFC 4506. The built-in data type is called simply "string", as there is no fixed-length variety. Signed-off-by: Chuck Lever

tools: Add xdrgen

2024-09-20T23:31:39Z

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 Signed-off-by: Chuck Lever

laptop-kernel/tools/net/sunrpc/xdrgen/generators/pointer.py, branch master

xdrgen: Add generator code for XDR width macros

xdrgen: Rename "variable-length strings"

tools: Add xdrgen