linux-kernel - Re: [Xen-devel] [PATCH 1/3] xen/pv-on-hvm kexec: add xs_introduce to shutdown watches from old kernel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20110809092812.GA7283@aepfle.de>
Date:	Tue, 9 Aug 2011 11:28:12 +0200
From:	Olaf Hering <olaf@...fle.de>
To:	Ian Campbell <Ian.Campbell@...rix.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Konrad <konrad.wilk@...cle.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>
Subject: Re: [Xen-devel] [PATCH 1/3] xen/pv-on-hvm kexec: add xs_introduce to
 shutdown watches from old kernel

On Tue, Aug 09, Ian Campbell wrote:

> > +++ linux-3.0/drivers/xen/xenbus/xenbus_xs.c

> > +	return xs_error(xs_talkv(XBT_NIL, XS_INTRODUCE, iov,
> > +				 ARRAY_SIZE(iov), NULL));
> 
> What should we do if this fails?

There is not much other than printk and move on.
A kexec boot cant be detected from withing kexec.

> > +	snprintf(domid, sizeof(domid), "%u", DOMID_SELF);
> > +	snprintf(mfn, sizeof(mfn), "%lu", xen_store_mfn);
> > +	snprintf(port, sizeof(port), "%d", xen_store_evtchn);
> 
> These can be within the if, or better within the xs_introduce function
> itself.

Yes, thats true. I will rearrange the code.

Olaf
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/