linux-kernel - Re: Making linkat() able to overwrite the target

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Message-ID: <359591.1579261375@warthog.procyon.org.uk>
Date:   Fri, 17 Jan 2020 11:42:55 +0000
From:   David Howells <dhowells@...hat.com>
To:     Omar Sandoval <osandov@...ndov.com>
Cc:     dhowells@...hat.com, "Colin Walters" <walters@...bum.org>,
        "Al Viro" <viro@...iv.linux.org.uk>, linux-fsdevel@...r.kernel.org,
        "Christoph Hellwig" <hch@....de>, "Theodore Ts'o" <tytso@....edu>,
        adilger.kernel@...ger.ca,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        "Chris Mason" <clm@...com>, josef@...icpanda.com, dsterba@...e.com,
        linux-ext4 <linux-ext4@...r.kernel.org>,
        xfs <linux-xfs@...r.kernel.org>, linux-btrfs@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: Making linkat() able to overwrite the target

Hi Omar,

Do you still have your AT_REPLACE patches?  You said that you'd post a v4
series, though I don't see it.  I could make use of such a feature in
cachefiles inside the kernel.  For my original question, see:

	https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=fscache-iter

And do you have ext4 support for it?

Colin Walters <walters@...bum.org> wrote:

> On Tue, Jan 14, 2020, at 1:06 PM, David Howells wrote:
> 
> > Yes, I suggested AT_LINK_REPLACE as said magical flag.
> 
> This came up before right?
> 
> https://lore.kernel.org/linux-fsdevel/cover.1524549513.git.osandov@fb.com/

David