Re: [PATCH RFC] VFS: lock source directory for link to avoid rename race.

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To: "Miklos Szeredi" <miklos@xxxxxxxxxx>
Subject: Re: [PATCH RFC] VFS: lock source directory for link to avoid rename race.
From: "NeilBrown" <neilb@xxxxxxx>
Date: Fri, 16 Sep 2022 16:45:05 +1000
Cc: "Al Viro" <viro@xxxxxxxxxxxxxxxxxx>, "Miklos Szeredi" <mszeredi@xxxxxxxxxx>, "Xavier Roche" <xavier.roche@xxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx
In-reply-to: <CAJfpeguwtADz8D1eUp4JVY-7-WKcf8giiiyvvdv4jccGtxcJKw@mail.gmail.com>

On Fri, 16 Sep 2022, Miklos Szeredi wrote:
> 
> This will break AT_SYMLINK_FOLLOW.
> 
> And yes, we can add all the lookup logic to do_linkat() at which point
> it will about 10x more complex than it was.

Excellent point.  I'll give that some thought.  Thanks.

NeilBrown

References:
- [PATCH v2] vfs: fix link vs. rename race
  - From: Miklos Szeredi
- Re: [PATCH v2] vfs: fix link vs. rename race
  - From: NeilBrown
- Re: [PATCH v2] vfs: fix link vs. rename race
  - From: Al Viro
- Re: [PATCH v2] vfs: fix link vs. rename race
  - From: NeilBrown
- Re: [PATCH v2] vfs: fix link vs. rename race
  - From: Al Viro
- [PATCH RFC] VFS: lock source directory for link to avoid rename race.
  - From: NeilBrown
- Re: [PATCH RFC] VFS: lock source directory for link to avoid rename race.
  - From: Miklos Szeredi

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