From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 C8CF83FEB03 for ; Tue, 24 Mar 2026 16:38:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774370321; cv=none; b=Zs3ZLcgtMt2jSQQhFO6gRoIQhr80o4Y+HWYemRNDP1ZP/RZkxTELcUbW6UK6J2/OlddFM3V7bSyfFeKe9An6q94WpEMOOBVJ8tM7nIvcKMbYO9M+T4QIeaf2Cui5MEaVKfyWrV3nfbG82OiwXYEZ8iVkovwJhba2s1WJbipk2kA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774370321; c=relaxed/simple; bh=vEw+Sd85+ssE0jae8ad5e9A3xlxTL8/CZ4l6YfDHWPo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KRKFRZutYyQzvtPLveLAXLrXqzai7L7dt6D5M85vIkIH27ZCfJ3pyaGKdb+nmt/SSQzEL6/iNbdbznNcPk2hgDYzmIr9ZgNu0Lvcsr86vFvBE8mV7inqdZp7SqZmGTWr3N3ITaMmPrevsA8R9Mx2/pNoO99sJodyfu+DzR7Q8QE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=cDsm2LcA; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="cDsm2LcA" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1774370318; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+SEnONMO6QE0oD/ZVmTfJfXvNgK5ZzMqlqDV/cmRY9o=; b=cDsm2LcAJ7PCoLpdpv47lNZM0aK+m2m7Xcjx4WMrWhpgWCAoCuHaBv++zdu+dBOTgh7ST5 6OS+bdG/SP6M0C5mnHg3xNpFVjg4NSqg5ZMgfIcsiV7PT3yYLoEWWiuCkZv04245dEabmI w6m7bUmzj9V3BbgOS1GWo0dsOaBsNz0= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-224-JEfM5P_UPF2fyJRGREdgAA-1; Tue, 24 Mar 2026 12:38:35 -0400 X-MC-Unique: JEfM5P_UPF2fyJRGREdgAA-1 X-Mimecast-MFC-AGG-ID: JEfM5P_UPF2fyJRGREdgAA_1774370314 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (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 mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6DB0B1800464; Tue, 24 Mar 2026 16:38:34 +0000 (UTC) Received: from localhost (unknown [10.72.116.133]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 9E9D319540C4; Tue, 24 Mar 2026 16:38:33 +0000 (UTC) From: Ming Lei To: Jens Axboe , io-uring@vger.kernel.org Cc: Caleb Sander Mateos , Akilesh Kailash , bpf@vger.kernel.org, Xiao Ni , Alexei Starovoitov , Ming Lei Subject: [PATCH V3 07/12] io_uring: bpf: add BPF buffer descriptor for IORING_OP_BPF Date: Wed, 25 Mar 2026 00:37:28 +0800 Message-ID: <20260324163753.1900977-8-ming.lei@redhat.com> In-Reply-To: <20260324163753.1900977-1-ming.lei@redhat.com> References: <20260324163753.1900977-1-ming.lei@redhat.com> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Add io_bpf_buf_desc struct and io_bpf_buf_type enum to describe buffer parameters for IORING_OP_BPF kfuncs. Supports plain userspace, registered, vectored, and registered vectored buffer types. Registered buffers (FIXED, KFIXED, REG_VEC) refer to buffers pre-registered with io_uring and can be either userspace or kernel buffers depending on how they were registered. Signed-off-by: Ming Lei --- include/uapi/linux/io_uring.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 3bf9be78a00a..6a265661bc20 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -453,6 +453,33 @@ enum io_uring_op { #define IORING_BPF_OP_BITS 8 #define IORING_BPF_OP_SHIFT 24 +/* + * BPF buffer descriptor types. + * + * Registered buffers (FIXED, KFIXED, REG_VEC) refer to buffers pre-registered + * with io_uring. These can be either userspace or kernel buffers depending on + * how they were registered. + * + * For KFIXED, addr is an offset from the registered buffer start. + * For REG_VEC with kernel buffers, each iov.iov_base is offset-based. + */ +enum io_bpf_buf_type { + IO_BPF_BUF_USER = 0, /* plain userspace buffer */ + IO_BPF_BUF_FIXED = 1, /* registered buffer (absolute address) */ + IO_BPF_BUF_VEC = 2, /* vectored buffer (iovec array) */ + IO_BPF_BUF_KFIXED = 3, /* registered buffer (offset-based) */ + IO_BPF_BUF_REG_VEC = 4, /* registered vectored buffer */ +}; + +/* BPF buffer descriptor for IORING_OP_BPF */ +struct io_bpf_buf_desc { + __u8 type; /* IO_BPF_BUF_* */ + __u8 reserved; + __u16 buf_index; /* registered buffer index (FIXED/KFIXED/REG_VEC) */ + __u32 len; /* length (non-vec) or nr_vecs (vec types) */ + __u64 addr; /* userspace address, iovec ptr, or offset (KFIXED) */ +}; + /* * cqe.res for IORING_CQE_F_NOTIF if * IORING_SEND_ZC_REPORT_USAGE was requested -- 2.53.0