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imf05.hostedemail.com; dkim=none; spf=none (imf05.hostedemail.com: domain of houtao@huaweicloud.com has no SPF policy when checking 45.249.212.51) smtp.mailfrom=houtao@huaweicloud.com; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1696686603; a=rsa-sha256; cv=none; b=0iMB7ZRUEwx8phdN+4eXKui9LfLAGhmtOkzxRd/1djfgG9fK982b3ZfA7ooMLn6NVO/SpS ZGe6utq1WRGAXf5k3cQAYcmUXlVJYQ1CNKeOhBKtxIOwZhQNW1ON2ob6ecPuUkqDwKDI5V 5Jeij+yDVSgs2J0F6P7K75N1hAfmWnw= Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4S2mrH4sJKz4f3lW3 for ; Sat, 7 Oct 2023 21:49:51 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.124.27]) by APP4 (Coremail) with SMTP id gCh0CgAnvdz9YSFl4YF2CQ--.30763S4; Sat, 07 Oct 2023 21:49:52 +0800 (CST) From: Hou Tao To: bpf@vger.kernel.org, linux-mm@kvack.org Cc: Martin KaFai Lau , Alexei Starovoitov , Andrii Nakryiko , Song Liu , Hao Luo , Yonghong Song , Daniel Borkmann , KP Singh , Stanislav Fomichev , Jiri Olsa , John Fastabend , houtao1@huawei.com, Dennis Zhou , Tejun Heo , Christoph Lameter , Andrew Morton Subject: [PATCH bpf-next 0/6] bpf: Fixes for per-cpu kptr Date: Sat, 7 Oct 2023 21:51:00 +0800 Message-Id: <20231007135106.3031284-1-houtao@huaweicloud.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:gCh0CgAnvdz9YSFl4YF2CQ--.30763S4 X-Coremail-Antispam: 1UD129KBjvJXoW7Aw1rArW5tr4fAF4fur4fuFg_yoW8XFyDpF Wftw1rtr40qFs7Gw1fWr1xua4rZw48GF1xG3WxX345ZrZaqry2qr40grW5uF90kFW29r1F y3sIgr1fCasrAFJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUk2b4IE77IF4wAFF20E14v26ryj6rWUM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4 vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7Cj xVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x 0267AKxVW0oVCq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG 6I80ewAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFV Cjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4IIrI8v6xkF7I0E8cxan2IY04v7MxAIw28I cxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2 IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVW8ZVWrXwCIc40Y0x0EwIxGrwCI 42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42 IY6xAIw20EY4v20xvaj40_WFyUJVCq3wCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E 87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxUFDGOUUUUU X-CM-SenderInfo: xkrx3t3r6k3tpzhluzxrxghudrp/ X-CFilter-Loop: Reflected X-Rspamd-Queue-Id: 620FF100002 X-Rspam-User: X-Stat-Signature: 7syhmor91ndwa93odouwsn1weh5bi5ts X-Rspamd-Server: rspam01 X-HE-Tag: 1696686601-863387 X-HE-Meta: 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 5Iv+GNUm tCFmyu8M/gf3wejbgXS0g3+S38/PZvE/whcblCBJ4kZf4N4f/vvy8KB2heSeDXpvlcp7hX+p2UcQKQN8KfgTBRR6Na1DIOXWF0f7RM0LN4pao3L9VDLLjqrWLedtc7WGOBvS++vSS9L+Kn72Nsn/TCPzRRKb8BWfy4mst/FhHRfe/aY1rByVHyuvopbKMDjjM/FurfyK3spyZ3lbi7PfY7pLiuqNSJrN2C2pxLtouw9vGBjBs63FP6+ocQlBTrr3ZFoBLDkawk0sbySN5z6e0/YRB4AEgDFHf3f3vJkmK+f+Ct+1pE29khs/Xe1HFCRYwD6RAh5APOENYK0w= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Hou Tao Hi, The patchset aims to fix the problems found in the review of per-cpu kptr patch-set [0]. Patch #1 introduces alloc_size_percpu() for dynamic per-cpu area. Patch #2 and #3 use alloc_size_percpu() to check whether or not unit_size matches with the size of underlying per-cpu area and to select a matching bpf_mem_cache. Patch #4 fixes the freeing of per-cpu kptr when these kptr is freed by map destruction. The last patch adds test cases for these problems. Please see individual patches for details. And comments are always welcome. [0]: https://lore.kernel.org/bpf/20230827152729.1995219-1-yonghong.song@linux.dev Hou Tao (6): mm/percpu.c: introduce alloc_size_percpu() bpf: Re-enable unit_size checking for global per-cpu allocator bpf: Use alloc_size_percpu() in bpf_mem_free{_rcu}() bpf: Move the declaration of __bpf_obj_drop_impl() to internal.h bpf: Use bpf_global_percpu_ma for per-cpu kptr in __bpf_obj_drop_impl() selftests/bpf: Add more test cases for bpf memory allocator include/linux/bpf_mem_alloc.h | 1 + include/linux/percpu.h | 1 + kernel/bpf/helpers.c | 25 ++- kernel/bpf/internal.h | 11 ++ kernel/bpf/memalloc.c | 41 ++-- kernel/bpf/syscall.c | 8 +- mm/percpu.c | 29 +++ .../selftests/bpf/prog_tests/test_bpf_ma.c | 20 +- .../testing/selftests/bpf/progs/test_bpf_ma.c | 180 +++++++++++++++++- 9 files changed, 282 insertions(+), 34 deletions(-) create mode 100644 kernel/bpf/internal.h -- 2.29.2