From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=198.54.127.154 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794057112; b=WZyw5HYwy7zCn0W7LgmyIBWPz5lP3bey/63BlzUmZgXg4FRqO5W5fBiNN2QqmmCu1GPN EjmQBTwCIs/w2kUgOPteAspiryuQGoC+aQ2D0dXTtipU0g9KeAbFcTzM8B5+h1C98Lqx0 hy6PMCprCknayhsS6sLU6jVXjezVCSfuNvSvmQuWAtRtXF4nU5NlgleMzzuQme6GbV/Pt 6EpVIAPslrXrl9ahwPtuTbHQeJOjgyTRVNiuDlU8Z8vTHLSwY/FNxrJ9JpH6abD3a2KLq lqjtFZEJ6Du8XQ92ecY9eiDQphwiOiyjfU2ytSydz5A3EB0Ecqc7hQuo8/h6WowiWHw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794057112; h=DMARC-Filter:Received:DKIM-Signature:From:To:Cc:Subject:Date: Message-ID:X-Mailer:MIME-Version:Content-Transfer-Encoding: X-Envelope-From; bh=HZdie3PW+1vtIp8DWod2GNqosXfOJizp6+UxsGisvRw=; b=dyqVWv5hx0BplF35rCkxJ+saxRbe7s8aC9MR4vwswL5Vc3mLigwvNaRGj3gYA0S7hb8Y FIgqZGijKHFlR83b64i08JslGIaUn4ckuH3EpkQqLOudlgi08J5SoYoyesJKvg/UJnXDV hzvyFSHdogXh1wCoL9HVKcsl1/yTgM6aidhc6sSWCZRn01mP15tbCwNS5r/KzICU9LgqN MGw3OPsJ4ji+RPltjpbKwwrZjWgIRZAGZVe+NardRUugTs4cOlo9iaa7iMtX1BTYMqP4o PJg7sDjIBWy7OuTdA6clSCeIpWqU2VOiQHUEbEQ3GE8vrzoyATDRgYqm74gBgZgT2Xg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=tychen.cc; spf=pass smtp.mailfrom=tychen.cc; dkim=pass header.d=tychen.cc header.i=@tychen.cc header.a=rsa-sha256 header.s=spacemail header.b=MdnzvFcr; arc=none smtp.remote-ip=198.54.127.154 Received: from out-2z4y-a154.jellyfish.systems (out-2z4y-a154.jellyfish.systems [198.54.127.154]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4E76C606A32F for ; Sat, 7 Nov 2026 13:11:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 4E76C606A32F Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=tychen.cc Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tychen.cc Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=tychen.cc header.i=@tychen.cc header.a=rsa-sha256 header.s=spacemail header.b=MdnzvFcr Received: from fedora (ec2-52-197-241-54.ap-northeast-1.compute.amazonaws.com [52.197.241.54]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.spacemail.com (Postfix) with ESMTPSA id 4jMGdq2xlNz8sWN; Sat, 07 Nov 2026 13:11:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tychen.cc; s=spacemail; t=1794057090; bh=HZdie3PW+1vtIp8DWod2GNqosXfOJizp6+UxsGisvRw=; h=From:To:Cc:Subject:Date:From; b=MdnzvFcrR9E3Gu7gM39gih+CEOOc8sqG5gUeTWmv969vHRxBW06fsR4ml4fABFpAN Mx+halgLBtrL7kmTxSJd4a7rSLCSELfj8d6S20pna7jELod/ed4/6Yfu935GsRB3wo CbzfhEByiksLEEpffLCEgoEa0Hkc80OyqlZwzYjMr19mak1NpSxSIbCtnH5uAjU2OD dcu9vhgRLzDz5f3yLrp9pefugiSe2a+1a7UL7Xmon1b2RddX1z+C8r0rZWMN+rawJ+ Bhwm0jKIVbKJTHrstSVyAUxRJX1qZXz8zzEbnDtkuMc1YoDDoJjBZpo0eRWwExN8Cm GOuI5gam3NrTw== From: Tianyi Chen To: bpf@vger.kernel.org Cc: Tianyi Chen , ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, eddyz87@gmail.com, memxor@gmail.com, yatsenko@meta.com, shuah@kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH bpf 0/2] bpf: Fix RHASH batch cursor loss Date: Sat, 7 Nov 2026 22:11:18 +0900 Message-ID: X-Mailer: git-send-email 2.56.0 X-Mailing-List: bpf@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Envelope-From: hi@tychen.cc RHASH batch lookups can report end-of-map when a key is deleted during the walk. Return EAGAIN for that case and add a regression test. Tested in an x86-64 VM: the regression fails without the fix and all five subtests pass with it. The bpftool batch and recursive tests also pass, separately and together. Tianyi Chen (2): bpf: Report lost RHASH batch traversal keys as EAGAIN selftests/bpf: Cover RHASH batch cursor loss kernel/bpf/hashtab.c | 13 +- .../selftests/bpf/prog_tests/rhash_batch.c | 181 ++++++++++++++++++ 2 files changed, 188 insertions(+), 6 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/rhash_batch.c base-commit: 646114a0d2f39e52f2204196ac12a6fe5a5a3fd3 -- 2.56.0