From patchwork Tue Oct 8 09:14:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hou Tao X-Patchwork-Id: 13826009 X-Patchwork-Delegate: bpf@iogearbox.net Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 36427176FCE for ; Tue, 8 Oct 2024 09:02:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728378153; cv=none; b=oUH/eOe6x8kbo1NRyny9qIqrvUt8VUQdj2Z/dw+ac4PtDvo5TD/DYLTzq5U+UyunOyCcaG9J+1P7+RL3n4b0o/yueBHUzWyr9x90ReZtg8YouwgawkL6A4S0sq0i/KOUOTOv544GbAqZ3GGA6IwM0WuAco/w/r93KrAcH017oXk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728378153; c=relaxed/simple; bh=AG9QykCHtjlQad1wQaHyYZ98sUxDRwlfk0McW+uJnKQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=c16Csl6uR8GQgX9uHfdeIG+vcc5IkD61eE+i+rOZSvolmNHS+0AcovmFX5cCxGwniRemLmTCi0ASQtrnKXvK+Oyj7yeVqWtwxcPSqZEu8/cF5XfY0ryMeA2C22yHTUVBlcrATxMiuoLO97/FtezefMr3OeQ5iLmlTTx2SLpFVxE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.93.142]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4XN9541R6jz4f3jqx for ; Tue, 8 Oct 2024 17:02:16 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id E4F341A147B for ; Tue, 8 Oct 2024 17:02:27 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.112.60]) by APP4 (Coremail) with SMTP id gCh0CgDH+sYd9QRnbOEHDg--.25681S10; Tue, 08 Oct 2024 17:02:27 +0800 (CST) From: Hou Tao To: bpf@vger.kernel.org Cc: Martin KaFai Lau , Alexei Starovoitov , Andrii Nakryiko , Eduard Zingerman , Song Liu , Hao Luo , Yonghong Song , Daniel Borkmann , KP Singh , Stanislav Fomichev , Jiri Olsa , John Fastabend , houtao1@huawei.com, xukuohai@huawei.com Subject: [PATCH bpf-next 06/16] bpf: Introduce bpf_dynptr_user Date: Tue, 8 Oct 2024 17:14:51 +0800 Message-ID: <20241008091501.8302-7-houtao@huaweicloud.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20241008091501.8302-1-houtao@huaweicloud.com> References: <20241008091501.8302-1-houtao@huaweicloud.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: gCh0CgDH+sYd9QRnbOEHDg--.25681S10 X-Coremail-Antispam: 1UD129KBjvJXoW7tr4xGF1rJF17tFWfXFyDAwb_yoW8AryxpF 95GrW3u3y8XFW7AryDJa1Ivr4ruFWrur17K3y2934jkFWDXas7Zw4xKas0kFZ8t3y5CrW7 JryxKrWrWryrXr7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPvb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E 14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7 xfMcIj6xIIjxv20xvE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Y z7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1lc7CjxVAaw2 AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAq x4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r 43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JFI_Gr1lIxAIcVC0I7IYx2IY6xkF 7I0E14v26r4UJVWxJr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14 v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuY vjxUoo7KUUUUU X-CM-SenderInfo: xkrx3t3r6k3tpzhluzxrxghudrp/ X-Patchwork-Delegate: bpf@iogearbox.net From: Hou Tao For bpf map with dynptr key support, the userspace application will use bpf_dynptr_user to represent the bpf_dynptr in the map key and pass it to bpf syscall. The bpf syscall will copy from bpf_dynptr_user to construct a corresponding bpf_dynptr_kern object when the map key is an input argument, and copy to bpf_dynptr_user from a bpf_dynptr_kern object when the map key is an output argument. For now the size of bpf_dynptr_user must be the same as bpf_dynptr, but the last u32 field is not used, so make it a reserved field. Signed-off-by: Hou Tao --- include/uapi/linux/bpf.h | 6 ++++++ tools/include/uapi/linux/bpf.h | 6 ++++++ 2 files changed, 12 insertions(+) diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 07f7df308a01..72fe6a96b54c 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -7329,6 +7329,12 @@ struct bpf_dynptr { __u64 __opaque[2]; } __attribute__((aligned(8))); +struct bpf_dynptr_user { + __u64 data; + __u32 size; + __u32 rsvd; +} __attribute__((aligned(8))); + struct bpf_list_head { __u64 __opaque[2]; } __attribute__((aligned(8))); diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 14f223282bfa..f12ce268e6be 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -7328,6 +7328,12 @@ struct bpf_dynptr { __u64 __opaque[2]; } __attribute__((aligned(8))); +struct bpf_dynptr_user { + __u64 data; + __u32 size; + __u32 rsvd; +} __attribute__((aligned(8))); + struct bpf_list_head { __u64 __opaque[2]; } __attribute__((aligned(8)));