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 36A31C636D3 for ; Thu, 2 Feb 2023 01:42:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229660AbjBBBmf (ORCPT ); Wed, 1 Feb 2023 20:42:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231433AbjBBBme (ORCPT ); Wed, 1 Feb 2023 20:42:34 -0500 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09B4C77DDB for ; Wed, 1 Feb 2023 17:42:33 -0800 (PST) Received: by mail-pj1-x1029.google.com with SMTP id e10-20020a17090a630a00b0022bedd66e6dso4150103pjj.1 for ; Wed, 01 Feb 2023 17:42:33 -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=n3aayDdIilVnW+ECMQQHHSm0J0IUJbFKBuiVmS/NUpY=; b=eXFJpIeXYVUSPivkytSVbl5Cx+bVouw4PGsZHvBMRjAggVZwRnnFxImsPUSa20NFrE iQaQCSoHR1+JgPHA480wcfU17dzZ6o6TjbyiXSVZ5mNF78+C+MWigkULQtnu04SPA1+u cg6adFij+OS202omImD6F+tFUMNBlxcb9Rp9mqPPGl+5JGMzZO6SjgnQWEHtHToUrhWn jIGii/ALcIlvUnzD0Exx3izAAq1GKvujASyQhprQEQbd8Rk8OCjePs9KmtHRSEvOtp+e jU+hziToxxaaSZYcyDEDGzDbL20GWelRB54kK2WL+32kFgH54EfHI751dKUP6YwQSVl5 nrRA== 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=n3aayDdIilVnW+ECMQQHHSm0J0IUJbFKBuiVmS/NUpY=; b=TOrEHIY16BESTTIZN9Ap/tHlO1l3Ak1TXtroqSD1uzrHmG4+dSsDPg0My/ghj7Tj68 3OSEyT4zcVcD2Emj7ajgYhgPwSFg2kGFib5XY+hpLSPtF8aysxjWKf9j94EMcdybIZog 8TYaNCFjG2M1psgRk/liNWJSzldhM7Chp4yRsddwtBDWz0h/mmfCSEX3Hu3EThMKKY0L PY3g7ShYKTrZt/yDdGkYQbAD+NgIOfasaCsrR+U+wvRJWckOfS7MTRf1L4e98sz9g9vT 7J24AsP4Er8QLxKr17h7IYyniPtJJDTrptQcU7IbhhvG2VIJQSUUzZFU3a8A65jcPMOX XQFw== X-Gm-Message-State: AO0yUKU7P9H8H1LaWo4odzeoxPQzEL5xW4eK1N454OnLiJAtl1T8oLnw oBF73bZylFvk4+gTce/TxJ46t3UvOFN4hbd30N8= X-Google-Smtp-Source: AK7set+dNLy+KLgiWVd1XMiLsrgHNgux7c0+iUY8ZD/JtU9eRdmRWRIuCrfznCo3Dy7IZq+ZnnpkmA== X-Received: by 2002:a05:6a21:3990:b0:bf:8840:ffd0 with SMTP id ad16-20020a056a21399000b000bf8840ffd0mr1013419pzc.29.1675302152581; Wed, 01 Feb 2023 17:42:32 -0800 (PST) Received: from vultr.guest ([2001:19f0:7001:3f48:5400:4ff:fe4a:8c8b]) by smtp.gmail.com with ESMTPSA id t191-20020a6381c8000000b004e8f7f23c4bsm6594205pgd.76.2023.02.01.17.42.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Feb 2023 17:42:32 -0800 (PST) From: Yafang Shao To: 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, 42.hyeyoo@gmail.com, vbabka@suse.cz, urezki@gmail.com Cc: linux-mm@kvack.org, bpf@vger.kernel.org, Yafang Shao Subject: [PATCH bpf-next 4/7] mm: util: introduce kvsize() Date: Thu, 2 Feb 2023 01:41:55 +0000 Message-Id: <20230202014158.19616-5-laoar.shao@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230202014158.19616-1-laoar.shao@gmail.com> References: <20230202014158.19616-1-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 new help kvsize() to report full size of underlying allocation of a kmalloc'ed addr or vmalloc'ed addr. Signed-off-by: Yafang Shao --- include/linux/slab.h | 1 + mm/util.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+) diff --git a/include/linux/slab.h b/include/linux/slab.h index 45af703..cccb4d8 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -762,6 +762,7 @@ static inline __alloc_size(1, 2) void *kvcalloc(size_t n, size_t size, gfp_t fla extern void *kvrealloc(const void *p, size_t oldsize, size_t newsize, gfp_t flags) __realloc_size(3); +extern size_t kvsize(void *addr); extern void kvfree(const void *addr); extern void kvfree_sensitive(const void *addr, size_t len); diff --git a/mm/util.c b/mm/util.c index b56c92f..f77d0cc 100644 --- a/mm/util.c +++ b/mm/util.c @@ -610,6 +610,21 @@ void *kvmalloc_node(size_t size, gfp_t flags, int node) EXPORT_SYMBOL(kvmalloc_node); /** + * kvsize() - Report full size of underlying allocation of adddr + * @addr: Pointer to kmalloc'ed or vmalloc'ed memory + * + * kvsize reports full size of underlying allocation of a kmalloc'ed addr + * or a vmalloc'ed addr. + */ +size_t kvsize(void *addr) +{ + if (is_vmalloc_addr(addr)) + return vsize(addr); + + return ksize(addr); +} + +/** * kvfree() - Free memory. * @addr: Pointer to allocated memory. * -- 1.8.3.1