linux-kernel - Re: [RFC PATCH 11/20] famfs: Add fs_context

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Date: Tue, 27 Feb 2024 17:49:02 -0800
From: Randy Dunlap <rdunlap@...radead.org>
To: John Groves <John@...ves.net>, Christian Brauner <brauner@...nel.org>
Cc: John Groves <jgroves@...ron.com>, Jonathan Corbet <corbet@....net>,
 Dan Williams <dan.j.williams@...el.com>,
 Vishal Verma <vishal.l.verma@...el.com>, Dave Jiang <dave.jiang@...el.com>,
 Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>,
 Matthew Wilcox <willy@...radead.org>, linux-cxl@...r.kernel.org,
 linux-fsdevel@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org, nvdimm@...ts.linux.dev, john@...alactic.com,
 Dave Chinner <david@...morbit.com>, Christoph Hellwig <hch@...radead.org>,
 dave.hansen@...ux.intel.com, gregory.price@...verge.com
Subject: Re: [RFC PATCH 11/20] famfs: Add fs_context_operations



On 2/27/24 16:59, John Groves wrote:
> On 24/02/27 02:41PM, Christian Brauner wrote:
>> On Fri, Feb 23, 2024 at 11:41:55AM -0600, John Groves wrote:
>>> This commit introduces the famfs fs_context_operations and
>>> famfs_get_inode() which is used by the context operations.
>>>
>>> Signed-off-by: John Groves <john@...ves.net>
>>> ---
>>>  fs/famfs/famfs_inode.c | 178 +++++++++++++++++++++++++++++++++++++++++
>>>  1 file changed, 178 insertions(+)
>>>
>>> diff --git a/fs/famfs/famfs_inode.c b/fs/famfs/famfs_inode.c
>>> index 82c861998093..f98f82962d7b 100644
>>> --- a/fs/famfs/famfs_inode.c
>>> +++ b/fs/famfs/famfs_inode.c
> 
> <snip>
> 

> 
> I wasn't aware of the new fsconfig interface. Is there documentation or a
> file sytsem that already uses it that I should refer to? I didn't find an
> obvious candidate, but it might be me. If it should be obvious from the
> example above, tell me and I'll try harder.

> My famfs code above was copied from ramfs. If you point me to 
> documentation I might send you a ramfs fsconfig patch too :D.

All that I found was the commit to add fsconfig to the kernel tree:

commit ecdab150fddb
Author: David Howells <dhowells@...hat.com>
Date:   Thu Nov 1 23:36:09 2018 +0000

    vfs: syscall: Add fsconfig() for configuring and managing a context

and the lore archive for its discussion:
https://lore.kernel.org/all/153313723557.13253.9055982745313603422.stgit@warthog.procyon.org.uk/


plus David's userspace man page addition for it:
https://lore.kernel.org/linux-fsdevel/159680897140.29015.15318866561972877762.stgit@warthog.procyon.org.uk/


-- 
#Randy