From patchwork Thu Nov 4 17:04:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beau Belgrave X-Patchwork-Id: 12603533 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EAEE3C433F5 for ; Thu, 4 Nov 2021 17:04:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4ADD61216 for ; Thu, 4 Nov 2021 17:04:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231834AbhKDRHQ (ORCPT ); Thu, 4 Nov 2021 13:07:16 -0400 Received: from linux.microsoft.com ([13.77.154.182]:54210 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231714AbhKDRHP (ORCPT ); Thu, 4 Nov 2021 13:07:15 -0400 Received: from localhost.localdomain (unknown [24.17.193.74]) by linux.microsoft.com (Postfix) with ESMTPSA id 7F41820ABA95; Thu, 4 Nov 2021 10:04:37 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 7F41820ABA95 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1636045477; bh=lad/j+ot53rXPTIMEBiBmAPcSVSE3JYr+2WF4ax63Do=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sxJ/HCy5tsfoIviT7+kO/eCKnuV/TdprD4vsoV3OtIe0Y5Q6/fCREY82z4avdbb6f 64X9HyC10//GMW7bLRsdx1ia1A1uv74CYOEpoA/erwCZAIp+E9VRydysUZClNmGFmr p7/3blrEbqbPAp56yRLLXsbb5YIS3gKPkQuUAwCU= From: Beau Belgrave To: rostedt@goodmis.org, mhiramat@kernel.org Cc: linux-trace-devel@vger.kernel.org, linux-kernel@vger.kernel.org, beaub@linux.microsoft.com Subject: [PATCH v4 01/10] user_events: Add UABI header for user access to user_events Date: Thu, 4 Nov 2021 10:04:24 -0700 Message-Id: <20211104170433.2206-2-beaub@linux.microsoft.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211104170433.2206-1-beaub@linux.microsoft.com> References: <20211104170433.2206-1-beaub@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Define the basic structs and ioctl commands that allow user processes to interact with user_events. Signed-off-by: Beau Belgrave --- include/uapi/linux/user_events.h | 68 ++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 include/uapi/linux/user_events.h diff --git a/include/uapi/linux/user_events.h b/include/uapi/linux/user_events.h new file mode 100644 index 000000000000..5bff99418deb --- /dev/null +++ b/include/uapi/linux/user_events.h @@ -0,0 +1,68 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * Copyright (c) 2021, Microsoft Corporation. + * + * Authors: + * Beau Belgrave + */ +#ifndef _UAPI_LINUX_USER_EVENTS_H +#define _UAPI_LINUX_USER_EVENTS_H + +#include +#include + +#ifdef __KERNEL__ +#include +#else +#include +#endif + +#define USER_EVENTS_SYSTEM "user_events" +#define USER_EVENTS_PREFIX "u:" + +/* Bits 0-6 are for known probe types, Bit 7 is for unknown probes */ +#define EVENT_BIT_FTRACE 0 +#define EVENT_BIT_PERF 1 +#define EVENT_BIT_OTHER 7 + +#define EVENT_STATUS_FTRACE (1 << EVENT_BIT_FTRACE) +#define EVENT_STATUS_PERF (1 << EVENT_BIT_PERF) +#define EVENT_STATUS_OTHER (1 << EVENT_BIT_OTHER) + +/* Use raw iterator for attached BPF program(s), no affect on ftrace/perf */ +#define FLAG_BPF_ITER (1 << 0) + +struct user_reg { + __u32 size; + __u64 name_args; + __u32 status_index; + __u32 write_index; +}; + +#define DIAG_IOC_MAGIC '*' +#define DIAG_IOCSREG _IOWR(DIAG_IOC_MAGIC, 0, struct user_reg*) +#define DIAG_IOCSDEL _IOW(DIAG_IOC_MAGIC, 1, char*) + +enum { + USER_BPF_DATA_KERNEL, + USER_BPF_DATA_USER, + USER_BPF_DATA_ITER, +}; + +struct user_bpf_iter { + __u32 iov_offset; + __u32 nr_segs; + const struct iovec *iov; +}; + +struct user_bpf_context { + __u32 data_type; + __u32 data_len; + union { + void *kdata; + void *udata; + struct user_bpf_iter *iter; + }; +}; + +#endif /* _UAPI_LINUX_USER_EVENTS_H */