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 772C3C636D3 for ; Thu, 2 Feb 2023 01:42:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230503AbjBBBm3 (ORCPT ); Wed, 1 Feb 2023 20:42:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229551AbjBBBm2 (ORCPT ); Wed, 1 Feb 2023 20:42:28 -0500 Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F141477DD9 for ; Wed, 1 Feb 2023 17:42:27 -0800 (PST) Received: by mail-pl1-x632.google.com with SMTP id m2so390332plg.4 for ; Wed, 01 Feb 2023 17:42:27 -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=JYjNCZTedk1AJoVE/LTBpwn60v8SrzPue4uHPDh5wcE=; b=iv03dHdBcW/AZOHUDlopVCkZMKFM5RQoGCY65iwL3v1XSSn6aFyN06IJDrI7/Y1dPh CaFdxSXVVjpIPBxknyOfU6wiAXoOpTQA7lbpm7JbzsU7X3rmtw9j/uDnDsZC8p37KAOl T/651l6xryaOqGzHBqD/t2tGccpWOjcNcUV+37GFHt59GhVhWtoCFFWYkEDTdq+EfD1B nVdqLRlenGwkWXLqu5fy40pZ2DGJG04NOPHli4XhXuvWujUoeJyQU9rSdmhiMvX2tS3i jVmpex4Sk2c0aoGC+RK06Pwp+M0a7xsu2yZ4brDKq+6NUq/LJ1nCbzhjhvPG43MnxO94 5Pvg== 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=JYjNCZTedk1AJoVE/LTBpwn60v8SrzPue4uHPDh5wcE=; b=4ybO7OVjYH46apBFkoZCyzRbLU3agBVcxokNXGDSM8DY9B90AGhLTJCE3MVKP516Zj O33kG12ZTI8LQGGq55lqFXZ21l/1DY0oOEFF/7ezWsebwlBUnQvXLBzCZaAVintSQi5x 0e2E2VvWKa/BllAK7DU8qL1PsY7ALJlMkBXRS+l/GwyW0vLd5HJlG7llza8hnLlSWV9K vLAYMfmXmijUaJmuVW7Ugq1rADqrfqwdA9CSBPIxad7dv00mdpZZDUuIImcdrdR4DkUg HlKn6ZDb0wDzwkjeTdGcgt/y4BIl1XAQvTzngCO6ICywdiFoU97b9RBoHKD9HyQril3T wiCg== X-Gm-Message-State: AO0yUKUheWSMo69lqyLGB5NwlqDQTVCEIdRoIuzjoLAH15s9BJHJPb39 /SMRISdygnG+Jml2lHahgS4= X-Google-Smtp-Source: AK7set9JBuOshDn5GHDps2tnszs7MZJQNL/kb7SOm046DT8cAbZupwyNErHhHuomwxoErVIBH3XDkA== X-Received: by 2002:a05:6a21:33aa:b0:bc:fe7e:cfd9 with SMTP id yy42-20020a056a2133aa00b000bcfe7ecfd9mr6068166pzb.18.1675302147552; Wed, 01 Feb 2023 17:42:27 -0800 (PST) Received: from vultr.guest ([2001:19f0:7001:3f48:5400:4ff:fe4a:8c8b]) by smtp.gmail.com with ESMTPSA id t191-20020a6381c8000000b004e8f7f23c4bsm6594205pgd.76.2023.02.01.17.42.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Feb 2023 17:42:27 -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 , Christoph Hellwig Subject: [PATCH bpf-next 3/7] mm: vmalloc: introduce vsize() Date: Thu, 2 Feb 2023 01:41:54 +0000 Message-Id: <20230202014158.19616-4-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 helper to report full size of underlying allocation of a vmalloc'ed address. Suggested-by: Uladzislau Rezki Signed-off-by: Yafang Shao Cc: Uladzislau Rezki Cc: Christoph Hellwig --- include/linux/vmalloc.h | 1 + mm/vmalloc.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 096d48a..7fbd390 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -297,4 +297,5 @@ struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, static inline bool vmalloc_dump_obj(void *object) { return false; } #endif +size_t vsize(void *addr); #endif /* _LINUX_VMALLOC_H */ diff --git a/mm/vmalloc.c b/mm/vmalloc.c index ca71de7..8499eba 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -4057,6 +4057,23 @@ bool vmalloc_dump_obj(void *object) } #endif +/* Report full size of underlying allocation of a vmalloc'ed addr */ +size_t vsize(void *addr) +{ + struct vmap_area *va; + size_t va_size = 0; + + if (!addr) + return 0; + + spin_lock(&vmap_area_lock); + va = __find_vmap_area((unsigned long)addr, &vmap_area_root); + if (va && va->vm) + va_size = va->vm->size; + spin_unlock(&vmap_area_lock); + return va_size; +} + #ifdef CONFIG_PROC_FS static void *s_start(struct seq_file *m, loff_t *pos) __acquires(&vmap_purge_lock) -- 1.8.3.1