From nobody Thu Oct 2 12:05:11 2025 Received: from mailout1.samsung.com (mailout1.samsung.com [203.254.224.24]) (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 9FFE431A7EE for ; Wed, 17 Sep 2025 13:30:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.254.224.24 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758115847; cv=none; b=Ru6LL7cFyjK6W7JVhQuyWUIF134dXwsoIAJ8rnuUOjjoTX483m9IWfZfvNxqEX+6ZTOWBe5woILFxpdxguZGGhPRBKTQwUrgfSWjOXbZLcmaVgM/+I8aF6R0dw+zhEXFEAXwJmAaG0li8fIpC9e5d5CI15agCT3RvBcd2tsI3nc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758115847; c=relaxed/simple; bh=vHuAadVlS3FOglAGf+BTtp47I18dR2Liu7MyC/Wl1sk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:MIME-Version: Content-Type:References; b=IvdGMrjl7ClyBBX6usSaEpkx0xLgxtiUr7M1pHGM1V+ZV5aDfA2pRzLL9aY52TdhhoRNpJFJREuz3FjFC8DhCKso8zGXyT7FVb3HnYUzvgdSmRr01WVK8ffs0UExjmhK99y6jBIW/Gu5T2QuQz6VjzNT7u6leEeoiPq9kDb4zJg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=ZrJVo0iH; arc=none smtp.client-ip=203.254.224.24 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="ZrJVo0iH" Received: from epcas5p2.samsung.com (unknown [182.195.41.40]) by mailout1.samsung.com (KnoxPortal) with ESMTP id 20250917133043epoutp018b7d5b218c0d040744337a2055dc596d~mFQuBvRBX2071320713epoutp01h for ; Wed, 17 Sep 2025 13:30:43 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.samsung.com 20250917133043epoutp018b7d5b218c0d040744337a2055dc596d~mFQuBvRBX2071320713epoutp01h DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1758115843; bh=EEuNV6QTBvuCr9tgJGSp5/94eDUJ6AJpAamfaAzmqdA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZrJVo0iHheXYoAH5J5+F0DMBN/eZULs0jbHDicfTvcL5k8r49CNtd6WOni3fqXNcL dfbtC0Ojx/ncLq2NTDey12KJ14HtZqojinmZkJrwmNzeB/NnM6/IbnjpbDGHq2k7RI BJ6viAdEH9ExsQ/hSkXuKTkClq8VXWPbr/cN0IWQ= Received: from epsnrtp03.localdomain (unknown [182.195.42.155]) by epcas5p1.samsung.com (KnoxPortal) with ESMTPS id 20250917133043epcas5p1be1e2edf693228ad2ab7f9a150b5ea78~mFQtuh3XV0665206652epcas5p19; Wed, 17 Sep 2025 13:30:43 +0000 (GMT) Received: from epcas5p4.samsung.com (unknown [182.195.38.91]) by epsnrtp03.localdomain (Postfix) with ESMTP id 4cRfm22tfgz3hhT4; Wed, 17 Sep 2025 13:30:42 +0000 (GMT) Received: from epsmtip1.samsung.com (unknown [182.195.34.30]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPA id 20250917133041epcas5p38c48d254424379593c32f1ea6d141156~mFQsSiHZw3266232662epcas5p3L; Wed, 17 Sep 2025 13:30:41 +0000 (GMT) Received: from test-PowerEdge-R740xd.samsungds.net (unknown [107.99.41.79]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20250917133040epsmtip132abdfa457cf90b723308441c664ed85~mFQrIEE9i0528605286epsmtip1j; Wed, 17 Sep 2025 13:30:40 +0000 (GMT) From: Neeraj Kumar To: linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, gost.dev@samsung.com Cc: a.manzanares@samsung.com, vishak.g@samsung.com, neeraj.kernel@gmail.com, Neeraj Kumar , Jonathan Cameron Subject: [PATCH V3 08/20] nvdimm/label: Include region label in slot validation Date: Wed, 17 Sep 2025 18:59:28 +0530 Message-Id: <20250917132940.1566437-9-s.neeraj@samsung.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250917132940.1566437-1-s.neeraj@samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CMS-MailID: 20250917133041epcas5p38c48d254424379593c32f1ea6d141156 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P cpgsPolicy: CPGSC10-542,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20250917133041epcas5p38c48d254424379593c32f1ea6d141156 References: <20250917132940.1566437-1-s.neeraj@samsung.com> Slot validation routine validates label slot by calculating label checksum. It was only validating namespace label. This changeset also validates region label if present. Signed-off-by: Neeraj Kumar Reviewed-by: Jonathan Cameron --- drivers/nvdimm/label.c | 72 ++++++++++++++++++++++++++++++++---------- drivers/nvdimm/nd.h | 5 +++ 2 files changed, 60 insertions(+), 17 deletions(-) diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index d33db96ba8ba..5e476154cf81 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -359,7 +359,7 @@ static bool nsl_validate_checksum(struct nvdimm_drvdata= *ndd, { u64 sum, sum_save; =20 - if (!ndd->cxl && !efi_namespace_label_has(ndd, checksum)) + if (!efi_namespace_label_has(ndd, checksum)) return true; =20 sum_save =3D nsl_get_checksum(ndd, nd_label); @@ -374,13 +374,25 @@ static void nsl_calculate_checksum(struct nvdimm_drvd= ata *ndd, { u64 sum; =20 - if (!ndd->cxl && !efi_namespace_label_has(ndd, checksum)) + if (!efi_namespace_label_has(ndd, checksum)) return; nsl_set_checksum(ndd, nd_label, 0); sum =3D nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1); nsl_set_checksum(ndd, nd_label, sum); } =20 +static bool region_label_validate_checksum(struct nvdimm_drvdata *ndd, + struct cxl_region_label *region_label) +{ + u64 sum, sum_save; + + sum_save =3D region_label_get_checksum(region_label); + region_label_set_checksum(region_label, 0); + sum =3D nd_fletcher64(region_label, sizeof_namespace_label(ndd), 1); + region_label_set_checksum(region_label, sum_save); + return sum =3D=3D sum_save; +} + static void region_label_calculate_checksum(struct nvdimm_drvdata *ndd, struct cxl_region_label *region_label) { @@ -392,16 +404,30 @@ static void region_label_calculate_checksum(struct nv= dimm_drvdata *ndd, } =20 static bool slot_valid(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, u32 slot) + union nd_lsa_label *lsa_label, u32 slot) { + struct cxl_region_label *region_label =3D &lsa_label->region_label; + struct nd_namespace_label *nd_label =3D &lsa_label->ns_label; + char *label_name; bool valid; =20 /* check that we are written where we expect to be written */ - if (slot !=3D nsl_get_slot(ndd, nd_label)) - return false; - valid =3D nsl_validate_checksum(ndd, nd_label); + if (is_region_label(ndd, lsa_label)) { + label_name =3D "rg"; + if (slot !=3D region_label_get_slot(region_label)) + return false; + valid =3D region_label_validate_checksum(ndd, region_label); + } else { + label_name =3D "ns"; + if (slot !=3D nsl_get_slot(ndd, nd_label)) + return false; + valid =3D nsl_validate_checksum(ndd, nd_label); + } + if (!valid) - dev_dbg(ndd->dev, "fail checksum. slot: %d\n", slot); + dev_dbg(ndd->dev, "%s label checksum fail. slot: %d\n", + label_name, slot); + return valid; } =20 @@ -424,7 +450,7 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) =20 nd_label =3D to_label(ndd, slot); =20 - if (!slot_valid(ndd, nd_label, slot)) + if (!slot_valid(ndd, (union nd_lsa_label *) nd_label, slot)) continue; =20 nsl_get_uuid(ndd, nd_label, &label_uuid); @@ -575,18 +601,30 @@ int nd_label_active_count(struct nvdimm_drvdata *ndd) return 0; =20 for_each_clear_bit_le(slot, free, nslot) { + struct cxl_region_label *region_label; struct nd_namespace_label *nd_label; - - nd_label =3D to_label(ndd, slot); - - if (!slot_valid(ndd, nd_label, slot)) { - u32 label_slot =3D nsl_get_slot(ndd, nd_label); - u64 size =3D nsl_get_rawsize(ndd, nd_label); - u64 dpa =3D nsl_get_dpa(ndd, nd_label); + union nd_lsa_label *lsa_label; + u32 lslot; + u64 size, dpa; + + lsa_label =3D (union nd_lsa_label *) to_label(ndd, slot); + nd_label =3D &lsa_label->ns_label; + region_label =3D &lsa_label->region_label; + + if (!slot_valid(ndd, lsa_label, slot)) { + if (is_region_label(ndd, lsa_label)) { + lslot =3D __le32_to_cpu(region_label->slot); + size =3D __le64_to_cpu(region_label->rawsize); + dpa =3D __le64_to_cpu(region_label->dpa); + } else { + lslot =3D nsl_get_slot(ndd, nd_label); + size =3D nsl_get_rawsize(ndd, nd_label); + dpa =3D nsl_get_dpa(ndd, nd_label); + } =20 dev_dbg(ndd->dev, "slot%d invalid slot: %d dpa: %llx size: %llx\n", - slot, label_slot, dpa, size); + slot, lslot, dpa, size); continue; } count++; @@ -607,7 +645,7 @@ struct nd_namespace_label *nd_label_active(struct nvdim= m_drvdata *ndd, int n) struct nd_namespace_label *nd_label; =20 nd_label =3D to_label(ndd, slot); - if (!slot_valid(ndd, nd_label, slot)) + if (!slot_valid(ndd, (union nd_lsa_label *) nd_label, slot)) continue; =20 if (n-- =3D=3D 0) diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 046063ea08b6..c985f91728dd 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -344,6 +344,11 @@ region_label_uuid_equal(struct cxl_region_label *regio= n_label, return uuid_equal((uuid_t *) region_label->uuid, uuid); } =20 +static inline u32 region_label_get_slot(struct cxl_region_label *region_la= bel) +{ + return __le32_to_cpu(region_label->slot); +} + static inline u64 region_label_get_checksum(struct cxl_region_label *region_label) { --=20 2.34.1