From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev,
Jonathan.Cameron@huawei.com, ben.widawsky@intel.com,
vishal.l.verma@intel.com, alison.schofield@intel.com,
ira.weiny@intel.com
Subject: Re: [PATCH 10/23] libnvdimm/labels: Add uuid helpers
Date: Wed, 11 Aug 2021 19:59:33 +0300 [thread overview]
Message-ID: <YRQB9Yvh3tmT9An4@smile.fi.intel.com> (raw)
In-Reply-To: <YROE48iCZNFaDcSo@smile.fi.intel.com>
On Wed, Aug 11, 2021 at 11:05:55AM +0300, Andy Shevchenko wrote:
> On Mon, Aug 09, 2021 at 03:28:40PM -0700, Dan Williams wrote:
> > In preparation for CXL labels that move the uuid to a different offset
> > in the label, add nsl_{ref,get,validate}_uuid(). These helpers use the
> > proper uuid_t type. That type definition predated the libnvdimm
> > subsystem, so now is as a good a time as any to convert all the uuid
> > handling in the subsystem to uuid_t to match the helpers.
> >
> > As for the whitespace changes, all new code is clang-format compliant.
>
> Thanks, looks good to me!
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Sorry, I'm in doubt this Rb stays. See below.
...
> > struct btt_sb {
> > u8 signature[BTT_SIG_LEN];
> > - u8 uuid[16];
> > - u8 parent_uuid[16];
> > + uuid_t uuid;
> > + uuid_t parent_uuid;
uuid_t type is internal to the kernel. This seems to be an ABI?
> > __le32 flags;
> > __le16 version_major;
> > __le16 version_minor;
...
> > struct nd_namespace_label {
> > - u8 uuid[NSLABEL_UUID_LEN];
> > + uuid_t uuid;
So seems this.
> > u8 name[NSLABEL_NAME_LEN];
> > __le32 flags;
> > __le16 nlabel;
...
I'm not familiar with FS stuff, but looks to me like unwanted changes.
In such cases you have to use export/import APIs. otherwise you make the type
carved in stone without even knowing that it's part of an ABI or some hardware
/ firmware interfaces.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2021-08-11 16:59 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
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 [this message]
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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