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From: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
To: Dan Williams <dan.j.williams@intel.com>
Cc: <linux-cxl@vger.kernel.org>, <nvdimm@lists.linux.dev>,
	<ben.widawsky@intel.com>, <vishal.l.verma@intel.com>,
	<alison.schofield@intel.com>, <ira.weiny@intel.com>
Subject: Re: [PATCH 07/23] libnvdimm/labels: Add type-guid helpers
Date: Wed, 11 Aug 2021 19:46:05 +0100	[thread overview]
Message-ID: <20210811194605.00003c46@Huawei.com> (raw)
In-Reply-To: <162854810459.1980150.1781727637396465986.stgit@dwillia2-desk3.amr.corp.intel.com>

On Mon, 9 Aug 2021 15:28:24 -0700
Dan Williams <dan.j.williams@intel.com> wrote:

> In preparation for CXL label support, which does not have the type-guid
> concept, wrap the existing users with nsl_set_type_guid, and
> nsl_validate_type_guid. Recall that the type-guid is a value in the ACPI
> NFIT table to indicate how the memory range is used / should be
> presented to upper layers.
> 
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> ---
>  drivers/nvdimm/label.c          |   26 ++++++++++++++++++++++----
>  drivers/nvdimm/namespace_devs.c |   19 ++++---------------
>  drivers/nvdimm/nd.h             |    2 ++
>  3 files changed, 28 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
> index 7188675c0955..294ffc3cb582 100644
> --- a/drivers/nvdimm/label.c
> +++ b/drivers/nvdimm/label.c
> @@ -772,6 +772,26 @@ static void reap_victim(struct nd_mapping *nd_mapping,
>  	victim->label = NULL;
>  }
>  
> +static void nsl_set_type_guid(struct nvdimm_drvdata *ndd,
> +			      struct nd_namespace_label *nd_label, guid_t *guid)
> +{
> +	if (namespace_label_has(ndd, type_guid))
> +		guid_copy(&nd_label->type_guid, guid);
> +}
> +
> +bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd,
> +			    struct nd_namespace_label *nd_label, guid_t *guid)
> +{
> +	if (!namespace_label_has(ndd, type_guid))
> +		return true;
> +	if (!guid_equal(&nd_label->type_guid, guid)) {
> +		dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n", guid,
> +			&nd_label->type_guid);
> +		return false;
> +	}
> +	return true;
> +}
> +
>  static int __pmem_label_update(struct nd_region *nd_region,
>  		struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm,
>  		int pos, unsigned long flags)
> @@ -822,8 +842,7 @@ static int __pmem_label_update(struct nd_region *nd_region,
>  	nsl_set_lbasize(ndd, nd_label, nspm->lbasize);
>  	nsl_set_dpa(ndd, nd_label, res->start);
>  	nsl_set_slot(ndd, nd_label, slot);
> -	if (namespace_label_has(ndd, type_guid))
> -		guid_copy(&nd_label->type_guid, &nd_set->type_guid);
> +	nsl_set_type_guid(ndd, nd_label, &nd_set->type_guid);
>  	if (namespace_label_has(ndd, abstraction_guid))
>  		guid_copy(&nd_label->abstraction_guid,
>  				to_abstraction_guid(ndns->claim_class,
> @@ -1091,8 +1110,7 @@ static int __blk_label_update(struct nd_region *nd_region,
>  		nsl_set_rawsize(ndd, nd_label, resource_size(res));
>  		nsl_set_lbasize(ndd, nd_label, nsblk->lbasize);
>  		nsl_set_slot(ndd, nd_label, slot);
> -		if (namespace_label_has(ndd, type_guid))
> -			guid_copy(&nd_label->type_guid, &nd_set->type_guid);
> +		nsl_set_type_guid(ndd, nd_label, &nd_set->type_guid);
>  		if (namespace_label_has(ndd, abstraction_guid))
>  			guid_copy(&nd_label->abstraction_guid,
>  					to_abstraction_guid(ndns->claim_class,
> diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
> index fbd0c2fcea4a..af5a31dd3147 100644
> --- a/drivers/nvdimm/namespace_devs.c
> +++ b/drivers/nvdimm/namespace_devs.c
> @@ -1859,14 +1859,9 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
>  			if (memcmp(nd_label->uuid, uuid, NSLABEL_UUID_LEN) != 0)
>  				continue;
>  
> -			if (namespace_label_has(ndd, type_guid)
> -					&& !guid_equal(&nd_set->type_guid,
> -						&nd_label->type_guid)) {
> -				dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
> -						&nd_set->type_guid,
> -						&nd_label->type_guid);
> +			if (!nsl_validate_type_guid(ndd, nd_label,
> +						    &nd_set->type_guid))
>  				continue;
> -			}
>  
>  			if (found_uuid) {
>  				dev_dbg(ndd->dev, "duplicate entry for uuid\n");
> @@ -2265,14 +2260,8 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
>  	struct device *dev = NULL;
>  	struct resource *res;
>  
> -	if (namespace_label_has(ndd, type_guid)) {
> -		if (!guid_equal(&nd_set->type_guid, &nd_label->type_guid)) {
> -			dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
> -					&nd_set->type_guid,
> -					&nd_label->type_guid);
> -			return ERR_PTR(-EAGAIN);
> -		}
> -	}
> +	if (!nsl_validate_type_guid(ndd, nd_label, &nd_set->type_guid))
> +		return ERR_PTR(-EAGAIN);
>  	if (!nsl_validate_blk_isetcookie(ndd, nd_label, nd_set->cookie2))
>  		return ERR_PTR(-EAGAIN);
>  
> diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
> index 2a9a608b7f17..f3c364df9449 100644
> --- a/drivers/nvdimm/nd.h
> +++ b/drivers/nvdimm/nd.h
> @@ -179,6 +179,8 @@ static inline void nsl_set_lbasize(struct nvdimm_drvdata *ndd,
>  bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd,
>  				 struct nd_namespace_label *nd_label,
>  				 u64 isetcookie);
> +bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd,
> +			    struct nd_namespace_label *nd_label, guid_t *guid);
>  
>  struct nd_region_data {
>  	int ns_count;
> 


  reply	other threads:[~2021-08-11 18:46 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-09 22:27 [PATCH 00/23] cxl_test: Enable CXL Topology and UAPI regression tests Dan Williams
2021-08-09 22:27 ` [PATCH 01/23] libnvdimm/labels: Introduce getters for namespace label fields Dan Williams
2021-08-10 20:48   ` Ben Widawsky
2021-08-10 21:58     ` Dan Williams
2021-08-11 18:44   ` Jonathan Cameron
2021-08-09 22:27 ` [PATCH 02/23] libnvdimm/labels: Add isetcookie validation helper Dan Williams
2021-08-11 18:44   ` Jonathan Cameron
2021-08-09 22:28 ` [PATCH 03/23] libnvdimm/labels: Introduce label setter helpers Dan Williams
2021-08-11 17:27   ` Jonathan Cameron
2021-08-11 17:42     ` Dan Williams
2021-08-09 22:28 ` [PATCH 04/23] libnvdimm/labels: Add a checksum calculation helper Dan Williams
2021-08-11 18:44   ` Jonathan Cameron
2021-08-09 22:28 ` [PATCH 05/23] libnvdimm/labels: Add blk isetcookie set / validation helpers Dan Williams
2021-08-11 18:45   ` Jonathan Cameron
2021-08-09 22:28 ` [PATCH 06/23] libnvdimm/labels: Add blk special cases for nlabel and position helpers Dan Williams
2021-08-11 18:45   ` Jonathan Cameron
2021-08-09 22:28 ` [PATCH 07/23] libnvdimm/labels: Add type-guid helpers Dan Williams
2021-08-11 18:46   ` Jonathan Cameron [this message]
2021-08-09 22:28 ` [PATCH 08/23] libnvdimm/labels: Add claim class helpers Dan Williams
2021-08-11 18:46   ` Jonathan Cameron
2021-08-09 22:28 ` [PATCH 09/23] libnvdimm/labels: Add address-abstraction uuid definitions Dan Williams
2021-08-11 18:49   ` Jonathan Cameron
2021-08-11 22:47     ` Dan Williams
2021-08-09 22:28 ` [PATCH 10/23] libnvdimm/labels: Add uuid helpers Dan Williams
2021-08-11  8:05   ` Andy Shevchenko
2021-08-11 16:59     ` Andy Shevchenko
2021-08-11 17:11       ` Dan Williams
2021-08-11 19:18         ` Andy Shevchenko
2021-08-11 19:26           ` Dan Williams
2021-08-12 22:34           ` Dan Williams
2021-08-13 10:14             ` Andy Shevchenko
2021-08-14  7:35               ` Christoph Hellwig
2021-08-11 18:13   ` Jonathan Cameron
2021-08-12 21:17     ` Dan Williams
2021-08-09 22:28 ` [PATCH 11/23] libnvdimm/labels: Introduce CXL labels Dan Williams
2021-08-11 18:41   ` Jonathan Cameron
2021-08-11 23:01     ` Dan Williams
2021-08-09 22:28 ` [PATCH 12/23] cxl/pci: Make 'struct cxl_mem' device type generic Dan Williams
2021-08-09 22:28 ` [PATCH 13/23] cxl/mbox: Introduce the mbox_send operation Dan Williams
2021-08-09 22:29 ` [PATCH 14/23] cxl/mbox: Move mailbox and other non-PCI specific infrastructure to the core Dan Williams
2021-08-11  6:11   ` [PATCH v2 " Dan Williams
2021-08-09 22:29 ` [PATCH 15/23] cxl/pci: Use module_pci_driver Dan Williams
2021-08-09 22:29 ` [PATCH 16/23] cxl/mbox: Convert 'enabled_cmds' to DECLARE_BITMAP Dan Williams
2021-08-09 22:29 ` [PATCH 17/23] cxl/mbox: Add exclusive kernel command support Dan Williams
2021-08-10 21:34   ` Ben Widawsky
2021-08-10 21:52     ` Dan Williams
2021-08-10 22:06       ` Ben Widawsky
2021-08-11  1:22         ` Dan Williams
2021-08-11  2:14           ` Dan Williams
2021-08-09 22:29 ` [PATCH 18/23] cxl/pmem: Translate NVDIMM label commands to CXL label commands Dan Williams
2021-08-09 22:29 ` [PATCH 19/23] cxl/pmem: Add support for multiple nvdimm-bridge objects Dan Williams
2021-08-09 22:29 ` [PATCH 20/23] tools/testing/cxl: Introduce a mocked-up CXL port hierarchy Dan Williams
2021-08-10 21:57   ` Ben Widawsky
2021-08-10 22:40     ` Dan Williams
2021-08-11 15:18       ` Ben Widawsky
     [not found]       ` <xp0k4.l2r85dw1p7do@intel.com>
2021-08-11 21:03         ` Dan Williams
2021-08-09 22:29 ` [PATCH 21/23] cxl/bus: Populate the target list at decoder create Dan Williams
2021-08-09 22:29 ` [PATCH 22/23] cxl/mbox: Move command definitions to common location Dan Williams
2021-08-09 22:29 ` [PATCH 23/23] tools/testing/cxl: Introduce a mock memory device + driver Dan Williams
2021-08-10 22:10 ` [PATCH 00/23] cxl_test: Enable CXL Topology and UAPI regression tests Ben Widawsky
2021-08-10 22:58   ` Dan Williams

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