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Fri, 16 May 2025 04:39:19 -0700 (PDT) Received: from imac ([2a02:8010:60a0:0:fc98:7863:72c2:6bab]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-442f39e84acsm106617245e9.25.2025.05.16.04.39.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 May 2025 04:39:18 -0700 (PDT) From: Donald Hunter To: Jakub Kicinski Cc: davem@davemloft.net, netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, andrew+netdev@lunn.ch, horms@kernel.org, daniel@iogearbox.net, nicolas.dichtel@6wind.com, jacob.e.keller@intel.com Subject: Re: [PATCH net-next 7/9] tools: ynl: submsg: reverse parse / error reporting In-Reply-To: <20250515231650.1325372-8-kuba@kernel.org> (Jakub Kicinski's message of "Thu, 15 May 2025 16:16:48 -0700") Date: Fri, 16 May 2025 11:58:41 +0100 Message-ID: References: <20250515231650.1325372-1-kuba@kernel.org> <20250515231650.1325372-8-kuba@kernel.org> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Jakub Kicinski writes: > Reverse parsing lets YNL convert bad and missing attr pointers > from extack into a string like "missing attribute nest1.nest2.attr_name". > It's a feature that's unique to YNL C AFAIU (even the Python YNL > can't do nested reverse parsing). Add support for reverse-parsing > of sub-messages. > > To simplify the logic and the code annotate the type policies > with extra metadata. Mark the selectors and the messages with > the information we need. We assume that key / selector always > precedes the sub-message while parsing (and also if there are > multiple sub-messages like in rt-link they are interleaved > selector 1 ... submsg 1 ... selector 2 .. submsg 2, not > selector 1 ... selector 2 ... submsg 1 ... submsg 2). > > The rt-link sample in a subsequent changes shows reverse parsing > of sub-messages in action. > > Signed-off-by: Jakub Kicinski Reviewed-by: Donald Hunter