linux-kernel - Re: [PATCHSET] making unix_bind() undo mknod on failure

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Message-ID: <20210223164026.01b56449@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Tue, 23 Feb 2021 16:40:26 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     netdev@...r.kernel.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        Christoph Hellwig <hch@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Cong Wang <xiyou.wangcong@...il.com>
Subject: Re: [PATCHSET] making unix_bind() undo mknod on failure

On Mon, 22 Feb 2021 19:06:00 +0000 Al Viro wrote:
> On Sat, Feb 20, 2021 at 09:08:56PM +0000, Al Viro wrote:
> 
> > *shrug*
> > 
> > If anything, __unix_complete_bind() might make a better name for that,
> > with dropping ->bindlock also pulled in, but TBH I don't have sufficiently
> > strong preferences - might as well leave dropping the lock to caller.
> > 
> > I'll post that series to netdev tonight.  
> 
> 	Took longer than I hoped...  Anyway, here's the current variant;
> it's 5.11-based, lives in
> git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git misc.af_unix
> 
> Shortlog:
> Al Viro (8):
>       af_unix: take address assignment/hash insertion into a new helper
>       unix_bind(): allocate addr earlier
>       unix_bind(): separate BSD and abstract cases
>       unix_bind(): take BSD and abstract address cases into new helpers
>       fold unix_mknod() into unix_bind_bsd()
>       unix_bind_bsd(): move done_path_create() call after dealing with ->bindlock
>       unix_bind_bsd(): unlink if we fail after successful mknod
>       __unix_find_socket_byname(): don't pass hash and type separately
> 
> Diffstat:
>  net/unix/af_unix.c | 186 +++++++++++++++++++++++++++--------------------------
>  1 file changed, 94 insertions(+), 92 deletions(-)
> 
> The actual fix is in #7/8, the first 6 are massage in preparation to that
> and #8/8 is a minor followup cleanup.  Individual patches in followups.

Dave is out this week, but this looks good to me. You said "please
review" - I'm assuming you'll send these to Linus yourself, so:

Acked-by: Jakub Kicinski <kuba@...nel.org>