From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FA57C54EBD for ; Thu, 12 Jan 2023 16:01:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235618AbjALQBV (ORCPT ); Thu, 12 Jan 2023 11:01:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42542 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236370AbjALQAt (ORCPT ); Thu, 12 Jan 2023 11:00:49 -0500 Received: from mail-qt1-x82f.google.com (mail-qt1-x82f.google.com [IPv6:2607:f8b0:4864:20::82f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F121163CD for ; Thu, 12 Jan 2023 07:53:40 -0800 (PST) Received: by mail-qt1-x82f.google.com with SMTP id h21so16647162qta.12 for ; Thu, 12 Jan 2023 07:53:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=e5Uabr6rMB0Xp+uFEKRqPdRCxhNWiBeN0NwYKLeAixU=; b=IZZcCnX8wvwbpWe4gRFRcNAA8cfuZZ0wsr6T2tk5JqzyUrWoECk/4yqCErfaMsazk6 N7DKy/pwRR8tik0IPz2om2ZlUpPenM3WYjJKSGh/XM0KWou/YEj178TroQUGudA3Gr/0 A+wXOR5mzYBFFtuLD/Xyosv98vs84h0GPrJUuURrbn0BVmnGez0uawzzxWR/bhJ3jYWF oncdliudHrevq3hyfaG8LM68B4V9wn4EXhKt8v+tGioF2P21ja/ntPiVXqNgI3SYQF1m hXMe2o3dK6RgqFDyGs5TPySYbn19i6IgD2uZok0X+D/OLeRK3WA7uktdtx5xsJDT4zhY ZcUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=e5Uabr6rMB0Xp+uFEKRqPdRCxhNWiBeN0NwYKLeAixU=; b=32vMle3w4gRruGwO8qQTiMMhziNt/l2BC4lfPvdWZFRyuLlbr8ifUDJgJtCTQrrT75 fYRYaOHsNOykVBU+yMZUsOCUwBZyve3vRAEJO2VXEesXt0VJPvvQxPqHtW39HuOAhP2R IN8zUf87BAAPmpFwSPk/2JKNZk9pUG8hdzOyUBGyDjEnH1STp/N7KnigsQmCmXC9eVyN AY6wsGjMqhdhW9n5/4HFz4ferH1EkJ6csZcw/F4Y5u1R5b0QvgG+SZmA2/5Fr5SUVZKm Lj2Tx+6pECiEorztDjwbbURwcqwEX+k0R/yqgAX1Bxji8wxPou+bafoI/zPMCyzkOvXO GRaQ== X-Gm-Message-State: AFqh2kpsJB1CeymVAQekCsw0lWwQftV6drJY9Kq9Ti7kFytLBvbi+zfl 3xARM55u6jpQpSl8/ZMJ8YM= X-Google-Smtp-Source: AMrXdXteMaFBBBox4hoGYeP7OQ1QSvsy+19+ts6oymG9XgnQ4GKqRTiAV+vZ7JEEP0SB0OSyUI7vXQ== X-Received: by 2002:ac8:5197:0:b0:3ac:940c:6a6c with SMTP id c23-20020ac85197000000b003ac940c6a6cmr22208861qtn.34.1673538820190; Thu, 12 Jan 2023 07:53:40 -0800 (PST) Received: from vultr.guest ([173.199.122.241]) by smtp.gmail.com with ESMTPSA id l17-20020ac848d1000000b003ab43dabfb1sm9280836qtr.55.2023.01.12.07.53.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Jan 2023 07:53:39 -0800 (PST) From: Yafang Shao To: 42.hyeyoo@gmail.com, vbabka@suse.cz, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org, tj@kernel.org, dennis@kernel.org, cl@linux.com, akpm@linux-foundation.org, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, roman.gushchin@linux.dev Cc: linux-mm@kvack.org, bpf@vger.kernel.org, Yafang Shao Subject: [RFC PATCH bpf-next v2 05/11] mm: vmalloc: introduce vsize() Date: Thu, 12 Jan 2023 15:53:20 +0000 Message-Id: <20230112155326.26902-6-laoar.shao@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230112155326.26902-1-laoar.shao@gmail.com> References: <20230112155326.26902-1-laoar.shao@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Introduce a helper to report full size of underlying allocation of a vmalloc'ed address. Signed-off-by: Yafang Shao --- include/linux/vmalloc.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 096d48a..52f925f 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -297,4 +297,19 @@ struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, static inline bool vmalloc_dump_obj(void *object) { return false; } #endif +/* Report full size of underlying allocation of a vmalloc'ed addr */ +static inline size_t vsize(const void *addr) +{ + struct vm_struct *area; + + if (!addr) + return 0; + + area = find_vm_area(addr); + if (unlikely(!area)) + return 0; + + return area->size; +} + #endif /* _LINUX_VMALLOC_H */ -- 1.8.3.1