netdev - Re: What's a good default TTL for DNS keys in the kernel

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Date:   Sat, 18 Apr 2020 20:10:53 +0200
From:   Florian Weimer <fweimer@...hat.com>
To:     Steve French <smfrench@...il.com>
Cc:     David Howells <dhowells@...hat.com>,
        linux-nfs <linux-nfs@...r.kernel.org>,
        CIFS <linux-cifs@...r.kernel.org>, linux-afs@...ts.infradead.org,
        ceph-devel@...r.kernel.org, keyrings@...r.kernel.org,
        Network Development <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: What's a good default TTL for DNS keys in the kernel

* Steve French:

>>> The question remains what the expected impact of TTL expiry is.  Will
>>> the kernel just perform a new DNS query if it needs one?
>
> For SMB3/CIFS mounts, Paulo added support last year for automatic
> reconnect if the IP address of the server changes.  It also is helpful
> when DFS (global name space) addresses change.

Do you have reference to the source code implementation?  Thanks.

Florian