Date: Sat, 19 Sep 2009 23:00:53 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: jhb@FreeBSD.org Cc: svn-src-head@FreeBSD.org, rmacklem@FreeBSD.org, svn-src-all@FreeBSD.org, rmacklem@uoguelph.ca, src-committers@FreeBSD.org Subject: Re: svn commit: r197298 - head/sbin/mount_nfs Message-ID: <20090919.230053.58383965.imp@bsdimp.com> In-Reply-To: <4AB495DD.1010006@FreeBSD.org> References: <4AB35086.90502@FreeBSD.org> <Pine.GSO.4.63.0909181100340.15785@muncher.cs.uoguelph.ca> <4AB495DD.1010006@FreeBSD.org>
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In message: <4AB495DD.1010006@FreeBSD.org> John Baldwin <jhb@FreeBSD.org> writes: : Rick Macklem wrote: : > : > : > On Fri, 18 Sep 2009, John Baldwin wrote: : > : >> Rick Macklem wrote: : >>> Author: rmacklem : >>> Date: Thu Sep 17 19:08:15 2009 : >>> New Revision: 197298 : >>> URL: http://svn.freebsd.org/changeset/base/197298 : >>> : >>> Log: : >>> Change the default transport protocol for use by the Mount protocol : >>> from UDP to TCP, so that it is consistent with TCP for NFS, which : >>> became the default at r176198. Without this change, doing an NFS mount : >>> against a server that only supports UDP would result in an unusable : >>> mount point if a transport protocol option wasn't specified for the : >>> mount. : >>> Approved by: kib (mentor) : >>> MFC after: 3 days : >> : >> Does this still use UDP for the mount protocol for a UDP mount? : >> : > Yep. If "udp" is specified, everything uses "udp". The only case : > affected by the change was when neither "udp" nor "tcp" were specified : > as options. : : Ok. : : > It happens that it still uses UDP for Portmapper by default and when : > "tcp" is specified, but that is down inside the libc functions and there : > are comments in them along the lines of "always use UDP first...", so : > I don't intend to change those. : : Hmm, it might actually be nice to be able to change those at some point : as well. I have looked at this in the past and it is quite deeply : buried in libc. :-/ What's the benefit for forcing a tcp connection for the portmapper RPCs? They just happen once at startup... Warner
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