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Wed, 16 Sep 2026 05:17:38 +0000 (GMT) From: "SandeepI" To: "'Jakub Kicinski'" Cc: , , , , , , , , , , , , , , , , , , , , "'Daeil Hwang'" , In-Reply-To: <20260915165805.359302fe@kernel.org> Subject: RE: [PATCH net-next v3] tcp: add TCP_ECN and TCP_ECN_OPTION socket options Date: Wed, 16 Sep 2026 10:47:37 +0530 Message-ID: <09fd01dd459a$b2b5ec50$1821c4f0$@samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQF4AsWRY+oGaIDuY7VKoCgi8Z06jgGdcOe2AS3TtgG3hNQBAA== Content-Language: en-in X-CMS-MailID: 20260916051741epcas5p4bfb1ebbc28556f987d535a280b2c8c83 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P cpgsPolicy: CPGSC10-065,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20260911091026epcas5p35873551b66ec0a50e20ada6e26d2b056 References: <20260911091148.456834-1-irlanki.s@samsung.com> <20260915165805.359302fe@kernel.org> > -----Original Message----- > From: Jakub Kicinski > Sent: 16 September 2026 05:28 > To: Irlanki Sandeep > Cc: netdev@vger.kernel.org; bpf@vger.kernel.org; davem@davemloft.net; > edumazet@google.com; pabeni@redhat.com; ncardwell@google.com; > ast@kernel.org; daniel@iogearbox.net; andrii@kernel.org; corbet@lwn.net; > linux-kernel@vger.kernel.org; lorenzo@google.com; maze@google.com; > sporeba@google.com; motomuman@google.com; srihari.k@samsung.com; > g.pokhra@samsung.com; r.kumawat@samsung.com; > raj.kumars@samsung.com; ts413.lee@samsung.com > Subject: Re: [PATCH net-next v3] tcp: add TCP_ECN and TCP_ECN_OPTION > socket options > > On Fri, 11 Sep 2026 14:41:48 +0530 Irlanki Sandeep wrote: > > Currently, ECN and Accurate ECN (AccECN) configurations in the Linux > > kernel are controlled globally via the net.ipv4.tcp_ecn and > > net.ipv4.tcp_ecn_option sysctl variables. This global approach lacks > > the granularity required for modern multi-application runtimes. > > CI (bpf-ci) reports a failure to build tools/testing/selftests/bpf on all tested > toolchains/architectures (x86-64 gcc-15, x86-64 llvm-21, s390x gcc-15, aarch64 > gcc-15) after this series. The build breaks in > progs/setget_sockopt.c: > > progs/setget_sockopt.c:67:11: error: use of undeclared identifier > 'TCP_ECN' > { .opt = TCP_ECN, .new = 3, .expected = 3, .restore = 255, }, > progs/setget_sockopt.c:68:11: error: use of undeclared identifier > 'TCP_ECN_OPTION' > { .opt = TCP_ECN_OPTION, .new = 2, .expected = 2, .restore = 255, }, Thanks for the report. TCP_ECN and TCP_ECN_OPTION have been defined in tools/testing/selftests/bpf/progs/bpf_tracing_net.h to resolve the compilation failure in progs/setget_sockopt.c. This has been addressed in v4: https://lore.kernel.org/all/20260916050255.1379192-1-irlanki.s@samsung.com/ Thanks, Sandeep.