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[86.153.201.25]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4950a32c65asm98894115e9.14.2026.07.14.13.39.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Jul 2026 13:39:38 -0700 (PDT) From: Nnamdi Onyeyiri To: jiayuan.chen@linux.dev Cc: nnamdio@gmail.com, john.fastabend@gmail.com, jakub@cloudflare.com, edumazet@google.com, ncardwell@google.com, kuniyu@google.com, davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, sashiko-reviews@lists.linux.dev Subject: [PATCH v3 0/2] bpf, sockmap: handle spurious tcp_msg_wait_data() wakeup Date: Tue, 14 Jul 2026 21:39:25 +0100 Message-ID: <20260714203927.32289-1-nnamdio@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <5b07d2ab-84ee-46ae-84c9-7542499d26d7@linux.dev> References: <5b07d2ab-84ee-46ae-84c9-7542499d26d7@linux.dev> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Spurious wakeups in tcp_msg_wait_data() isn't being handled by tcp_bpf_recvmsg() and tcp_bpf_recvmsg_parser(), leading to unexpected EAGAIN errors returned by recvfrom()/recv(). Adding handling for the wakeup and a selftest. Changes in v2: - In tcp_bpf_recvmsg, handle signals and the socket closing in the loop. - Fix spurious wakeups when SO_RCVTIMEO has been set on the socket. - Link to v1: https://patch.msgid.link/ak_rR-Skd8Mvn4mH@localhost.localdomain Changes in v3: - Added the sockmap_recvfrom selftest. - Link to v2: https://patch.msgid.link/alFRK66z45eDNZA7@localhost.localdomain Signed-off-by: Nnamdi Onyeyiri --- Nnamdi Onyeyiri (2): bpf, sockmap: handle spurious tcp_msg_wait_data() wakeup bpf, sockmap: handle spurious tcp_msg_wait_data() wakeup net/ipv4/tcp_bpf.c | 55 +++- tools/testing/selftests/net/.gitignore | 2 + tools/testing/selftests/net/Makefile | 6 + .../selftests/net/sockmap_recvfrom.bpf.c | 31 ++ .../testing/selftests/net/sockmap_recvfrom.c | 288 ++++++++++++++++++ 5 files changed, 373 insertions(+), 9 deletions(-) create mode 100644 tools/testing/selftests/net/sockmap_recvfrom.bpf.c create mode 100644 tools/testing/selftests/net/sockmap_recvfrom.c -- 2.52.0