Date: Tue, 24 Feb 2004 14:51:36 +0300 From: Gleb Smirnoff <glebius@cell.sick.ru> To: Andre Oppermann <andre@freebsd.org> Cc: freebsd-net@freebsd.org Subject: Re: rtalloc()/rtfree() problems on CURRENT Message-ID: <20040224115136.GA78223@cell.sick.ru> In-Reply-To: <403B2423.DABF2E48@freebsd.org> References: <20040224080353.GA76272@cell.sick.ru> <403B2423.DABF2E48@freebsd.org>
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Andre,
I can provide you with any additional information,
since I have crashdump saved. I can dig into the problem myself
if you give me some pointers where to look at.
On Tue, Feb 24, 2004 at 11:14:59AM +0100, Andre Oppermann wrote:
A> Gleb Smirnoff wrote:
A> >
A> > Dear sirs,
A> >
A> > please take a look at the following problem. I've been
A> > successfully using the following code on STABLE and 5.1-RELEASE:
A> >
A> > struct route ro;
A> > struct sockaddr_in *sin;
A> >
A> > bzero((caddr_t)&ro, sizeof(ro));
A> > sin = (struct sockaddr_in *)&ro.ro_dst;
A> > sin->sin_len = sizeof(*sin);
A> > sin->sin_family = AF_INET;
A> > sin->sin_addr = fle->r.r_dst;
A> > rtalloc(&ro);
A>
A> Most of the time, if you don't need a cloned route allocated, you can
A> just use rtalloc_ign(&ro, RTF_CLONING) to just get a reference to the
A> existing rtentry. Not allocating a new cloned route saves work and
A> time for the rtalloc code.
A>
A> > if (ro.ro_rt != NULL) {
A> > struct rtentry *rt = ro.ro_rt;
A> >
A> > /* here some read-only things are done with rt */
A>
A> Maybe you do some nasty things to rt here?
A>
A> > rtfree(ro.ro_rt);
A> > }
A> >
A> > But on CURRENT rtfree() causes panic. Here is backtrace:
A> ...
A> > Does this mean that something is broken in CURRENT or I am doing something wrong?
A>
A> rtalloc() and rtfree() are used quite often in the network code and
A> otherwise work fine. The odds are high that you are doing something
A> wrong.
A>
A> --
A> Andre
--
Totus tuus, Glebius.
GLEBIUS-RIPN GLEB-RIPE
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