From nobody Thu Oct 2 11:57:48 2025 Received: from mailout2.samsung.com (mailout2.samsung.com [203.254.224.25]) (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 20B89330D5E for ; Wed, 17 Sep 2025 13:41:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.254.224.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758116508; cv=none; b=sBXYkRSQ4Rr9fjevFh59Qnbg17tyONZIoDa0XZdOogXWAmqvaajFBTgdYh7KgJHSwEx8/P/3pSbQJ7lmMg1p+fWXumAEEm543OfyjvySWDbItCNcRuoQR/dycFm6Klwy+iov/3WsxCBuWOOqvrj9q7XEwEAH1sxEjixnyXwDAfs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758116508; c=relaxed/simple; bh=ObxFNjY3CDqZKiFtjzWuhPhDg4JW+Aar2f8yMQjHZoU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:MIME-Version: Content-Type:References; b=OZ9qc3rvsJahELy4pFQEYrInALScuixwzaTK7HFWWjY9pIz/kLmY/iQ1QYYLhIpeM7ELfiLfOWeoG0beJkyhw92sN2x4JTCnhi1XX0riMdsCGHMv90W6QBbw4ZMQiyv+rz8gSFMVqnaIpG97HRZjz6yQvmrr3MCqMzRVNpm2cVw= 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=pJTYRhQp; arc=none smtp.client-ip=203.254.224.25 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="pJTYRhQp" Received: from epcas5p3.samsung.com (unknown [182.195.41.41]) by mailout2.samsung.com (KnoxPortal) with ESMTP id 20250917134144epoutp02cbc71effb307a8d78c1658e0e8128ac9~mFaVZVNkh1573115731epoutp02O for ; Wed, 17 Sep 2025 13:41:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.samsung.com 20250917134144epoutp02cbc71effb307a8d78c1658e0e8128ac9~mFaVZVNkh1573115731epoutp02O DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1758116504; bh=UJ9hFCDX6oRFE5yO/OJ6tbFOtoiVij+t/C+pJ0pqnUk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pJTYRhQpNP+3GVB4KXwav19kjQ88rkiKfF7R1bJ+2BAexl6JfxfHV0/GqBpnfS8nd wjyEKNz1E2dl+haD5mBudyoYKCYMGVFTzTrCZ3BrBU7WNtItOTQWcC05J3MBU2pWKr 30//9mZlP9IY3n+7L3lG9p/WCdI21/sNLWFMS2r0= Received: from epsnrtp02.localdomain (unknown [182.195.42.154]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPS id 20250917134144epcas5p39965d3dd0da5249034d52607471ef6f6~mFaU-DBT30180401804epcas5p30; Wed, 17 Sep 2025 13:41:44 +0000 (GMT) Received: from epcas5p3.samsung.com (unknown [182.195.38.95]) by epsnrtp02.localdomain (Postfix) with ESMTP id 4cRg0l0TMhz2SSKX; Wed, 17 Sep 2025 13:41:43 +0000 (GMT) Received: from epsmtip2.samsung.com (unknown [182.195.34.31]) by epcas5p4.samsung.com (KnoxPortal) with ESMTPA id 20250917134142epcas5p49d85873cf3ea5f3166c63381ab668fc7~mFaTm8opi2411624116epcas5p4c; Wed, 17 Sep 2025 13:41:42 +0000 (GMT) Received: from test-PowerEdge-R740xd.samsungds.net (unknown [107.99.41.79]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20250917134141epsmtip27a4a7bd0a74dacbc35e662da756e84ea~mFaSTAfEd0911709117epsmtip2T; Wed, 17 Sep 2025 13:41:40 +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, cpgs@samsung.com, Neeraj Kumar Subject: [PATCH V3 07/20] nvdimm/region_label: Add region label delete support Date: Wed, 17 Sep 2025 19:11:03 +0530 Message-Id: <20250917134116.1623730-8-s.neeraj@samsung.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250917134116.1623730-1-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: 20250917134142epcas5p49d85873cf3ea5f3166c63381ab668fc7 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P X-CPGSPASS: Y cpgsPolicy: CPGSC10-542,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20250917134142epcas5p49d85873cf3ea5f3166c63381ab668fc7 References: <20250917134116.1623730-1-s.neeraj@samsung.com> Added LSA v2.1 format region label deletion routine. This function is used to delete region label from LSA Signed-off-by: Neeraj Kumar --- drivers/nvdimm/label.c | 79 ++++++++++++++++++++++++++++++--- drivers/nvdimm/label.h | 1 + drivers/nvdimm/namespace_devs.c | 12 +++++ drivers/nvdimm/nd.h | 6 +++ include/linux/libnvdimm.h | 1 + 5 files changed, 92 insertions(+), 7 deletions(-) diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index 209c73f6b7e7..d33db96ba8ba 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -1126,11 +1126,13 @@ static int init_labels(struct nd_mapping *nd_mappin= g, int num_labels) return max(num_labels, old_num_labels); } =20 -static int del_labels(struct nd_mapping *nd_mapping, uuid_t *uuid) +static int del_labels(struct nd_mapping *nd_mapping, uuid_t *uuid, + enum label_type ltype) { struct nvdimm_drvdata *ndd =3D to_ndd(nd_mapping); struct nd_label_ent *label_ent, *e; struct nd_namespace_index *nsindex; + union nd_lsa_label *nd_label; unsigned long *free; LIST_HEAD(list); u32 nslot, slot; @@ -1145,15 +1147,28 @@ static int del_labels(struct nd_mapping *nd_mapping= , uuid_t *uuid) =20 guard(mutex)(&nd_mapping->lock); list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { - struct nd_namespace_label *nd_label =3D label_ent->label; + nd_label =3D (union nd_lsa_label *) label_ent->label; =20 if (!nd_label) continue; active++; - if (!nsl_uuid_equal(ndd, nd_label, uuid)) - continue; + + switch (ltype) { + case NS_LABEL_TYPE: + if (!nsl_uuid_equal(ndd, &nd_label->ns_label, uuid)) + continue; + + break; + case RG_LABEL_TYPE: + if (!region_label_uuid_equal(&nd_label->region_label, + uuid)) + continue; + + break; + } + active--; - slot =3D to_slot(ndd, nd_label); + slot =3D to_slot(ndd, &nd_label->ns_label); nd_label_free_slot(ndd, slot); dev_dbg(ndd->dev, "free: %d\n", slot); list_move_tail(&label_ent->list, &list); @@ -1161,7 +1176,7 @@ static int del_labels(struct nd_mapping *nd_mapping, = uuid_t *uuid) } list_splice_tail_init(&list, &nd_mapping->labels); =20 - if (active =3D=3D 0) { + if ((ltype =3D=3D NS_LABEL_TYPE) && (active =3D=3D 0)) { nd_mapping_free_labels(nd_mapping); dev_dbg(ndd->dev, "no more active labels\n"); } @@ -1198,7 +1213,8 @@ int nd_pmem_namespace_label_update(struct nd_region *= nd_region, int count =3D 0; =20 if (size =3D=3D 0) { - rc =3D del_labels(nd_mapping, nspm->uuid); + rc =3D del_labels(nd_mapping, nspm->uuid, + NS_LABEL_TYPE); if (rc) return rc; continue; @@ -1281,6 +1297,55 @@ int nd_pmem_region_label_update(struct nd_region *nd= _region) return 0; } =20 +int nd_pmem_region_label_delete(struct nd_region *nd_region) +{ + struct nd_interleave_set *nd_set =3D nd_region->nd_set; + struct nd_label_ent *label_ent; + int ns_region_cnt =3D 0; + int i, rc; + + for (i =3D 0; i < nd_region->ndr_mappings; i++) { + struct nd_mapping *nd_mapping =3D &nd_region->mapping[i]; + struct nvdimm_drvdata *ndd =3D to_ndd(nd_mapping); + + /* Find non cxl format supported ndr_mappings */ + if (!ndd->cxl) { + dev_info(&nd_region->dev, "Unsupported region label\n"); + return -EINVAL; + } + + /* Find if any NS label using this region */ + guard(mutex)(&nd_mapping->lock); + list_for_each_entry(label_ent, &nd_mapping->labels, list) { + if (!label_ent->label) + continue; + + /* + * Check if any available NS labels has same + * region_uuid in LSA + */ + if (nsl_region_uuid_equal(label_ent->label, + &nd_set->uuid)) + ns_region_cnt++; + } + } + + if (ns_region_cnt) { + dev_dbg(&nd_region->dev, "Region/Namespace label in use\n"); + return -EBUSY; + } + + for (i =3D 0; i < nd_region->ndr_mappings; i++) { + struct nd_mapping *nd_mapping =3D &nd_region->mapping[i]; + + rc =3D del_labels(nd_mapping, &nd_set->uuid, RG_LABEL_TYPE); + if (rc) + return rc; + } + + return 0; +} + int __init nd_label_init(void) { WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h index 284e2a763b49..276dd822e142 100644 --- a/drivers/nvdimm/label.h +++ b/drivers/nvdimm/label.h @@ -238,4 +238,5 @@ struct nd_namespace_pmem; int nd_pmem_namespace_label_update(struct nd_region *nd_region, struct nd_namespace_pmem *nspm, resource_size_t size); int nd_pmem_region_label_update(struct nd_region *nd_region); +int nd_pmem_region_label_delete(struct nd_region *nd_region); #endif /* __LABEL_H__ */ diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_dev= s.c index 559f822ef24f..564a73b1da41 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -244,6 +244,18 @@ int nd_region_label_update(struct nd_region *nd_region) } EXPORT_SYMBOL_GPL(nd_region_label_update); =20 +int nd_region_label_delete(struct nd_region *nd_region) +{ + int rc; + + nvdimm_bus_lock(&nd_region->dev); + rc =3D nd_pmem_region_label_delete(nd_region); + nvdimm_bus_unlock(&nd_region->dev); + + return rc; +} +EXPORT_SYMBOL_GPL(nd_region_label_delete); + static int nd_namespace_label_update(struct nd_region *nd_region, struct device *dev) { diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index f04c042dcfa9..046063ea08b6 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -331,6 +331,12 @@ static inline bool is_region_label(struct nvdimm_drvda= ta *ndd, return uuid_equal(®ion_type, ns_type); } =20 +static inline bool nsl_region_uuid_equal(struct nd_namespace_label *ns_lab= el, + const uuid_t *uuid) +{ + return uuid_equal((uuid_t *) ns_label->cxl.region_uuid, uuid); +} + static inline bool region_label_uuid_equal(struct cxl_region_label *region_label, const uuid_t *uuid) diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h index 2c213b9dac66..bbf14a260c93 100644 --- a/include/linux/libnvdimm.h +++ b/include/linux/libnvdimm.h @@ -315,6 +315,7 @@ int nvdimm_has_cache(struct nd_region *nd_region); int nvdimm_in_overwrite(struct nvdimm *nvdimm); bool is_nvdimm_sync(struct nd_region *nd_region); int nd_region_label_update(struct nd_region *nd_region); +int nd_region_label_delete(struct nd_region *nd_region); =20 static inline int nvdimm_ctl(struct nvdimm *nvdimm, unsigned int cmd, void= *buf, unsigned int buf_len, int *cmd_rc) --=20 2.34.1