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AJvYcCXhLOd5tgt1yBdpciT/xXa82bCtVZp31Lw/dUTEizsL2m4FpFqqVkCci0WdnYoP8kflzJW9sboq8nj+r4oR2NkaLoAx X-Gm-Message-State: AOJu0YwL0RL47SYX2ZZWX7fw+Rw+LzNn0yFr/BMGJZ8oC7Yc1ytp1/lK L6yTnJJeuBnEN9s+nI5kciYqlZg8vSAa589vBpTdXvSeVLGnO5sq1bhKcz/EoS+di4NIoXZB3m3 PMHk= X-Google-Smtp-Source: AGHT+IFFhmSZ8eRL7XpdHbGlPAb2AF681cQcWm3zoxZWXp4dPHqdDwZIK1LmrmsNpKP4cHyYnixSRw== X-Received: by 2002:a50:ab12:0:b0:57c:61a3:546 with SMTP id 4fb4d7f45d1cf-59eef15e4a7mr905575a12.21.1721120316341; Tue, 16 Jul 2024 01:58:36 -0700 (PDT) Received: from cloudflare.com ([2a09:bac5:5063:2432::39b:77]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-59b2504b80dsm4522002a12.32.2024.07.16.01.58.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Jul 2024 01:58:35 -0700 (PDT) From: Jakub Sitnicki To: Michal Luczaj Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, john.fastabend@gmail.com, kuniyu@amazon.com, Rao.Shoaib@oracle.com, cong.wang@bytedance.com Subject: Re: [PATCH bpf v4 4/4] selftest/bpf: Test sockmap redirect for AF_UNIX MSG_OOB In-Reply-To: <20240713200218.2140950-5-mhal@rbox.co> (Michal Luczaj's message of "Sat, 13 Jul 2024 21:41:41 +0200") References: <20240713200218.2140950-1-mhal@rbox.co> <20240713200218.2140950-5-mhal@rbox.co> User-Agent: mu4e 1.12.4; emacs 29.1 Date: Tue, 16 Jul 2024 10:58:34 +0200 Message-ID: <87bk2x90hx.fsf@cloudflare.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Sat, Jul 13, 2024 at 09:41 PM +02, Michal Luczaj wrote: > Verify that out-of-band packets are silently dropped before they reach the > redirection logic. > > The idea is to test with a 2 byte long send(). Should a MSG_OOB flag be in > use, only the last byte will be treated as out-of-band. Test fails if > verd_mapfd indicates a wrong number of packets processed (e.g. if OOB > wasn't dropped at the source) or if it was possible to recv() MSG_OOB from > the mapped socket, or if any stale OOB data have been left reachable from > the unmapped socket. > > Signed-off-by: Michal Luczaj > --- Reviewed-by: Jakub Sitnicki