On Thu, 23 Jun 2011 23:15:29 +0400 Pavel Shilovsky <piastryyy@xxxxxxxxx> wrote: > 2011/6/23 Grazvydas Ignotas <notasas@xxxxxxxxx>: > > Hello, > > > > one of our slave servers have changed it's address, and I can no > > longer access it's shares that are forwarded to by the main server > > using DFS redirection. The slave server resolves correctly when trying > > to access it directly, but when trying to access through a mount on > > the main server, cifsFYI shows dns_resolve_server_name_to_ip returns > > the old address. I've verified slave server names match and windows > > clients can access those DFS shares correctly. It has been several > > days since server address change. I'm running 2.6.38.2 kernel on > > Ubuntu 10.04. > > > > Any way to clear that dns_resolver cache? I have no desire to reboot > > the machine. > > > > It seems that dns_resolver sets expiry timeout to zero here > (http://lxr.free-electrons.com/source/security/keys/key.c#L310) and > doesn't change it - so, it always returns cached value. > > David, can you comment on this problem, please? > I think the right thing to do here is probably to tie the lifetime of the key to the record's TTL. Getting that info may be a little tricky though since it's not generally available via getaddrinfo and such. Also, for name records that come from /etc/hosts or yp, or some other mechanism you'll need to pick a default TTL since those mechanisms don't provide one. -- Jeff Layton <jlayton@xxxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
