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- udp-fallback.fix: Fix fallback from tcp to udp

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(bnc#863749)

OBS-URL: https://build.opensuse.org/package/show/Base:System/nfs-utils?expand=0&rev=111
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Neil Brown 2014-02-17 23:57:33 +00:00 committed by Git OBS Bridge
parent 398d0be156
commit 439a0898e8
3 changed files with 46 additions and 1 deletions
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6
nfs-utils.changes
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@ -1,3 +1,9 @@
-------------------------------------------------------------------
Mon Feb 17 04:40:41 UTC 2014 - nfbrown@suse.com
- udp-fallback.fix: Fix fallback from tcp to udp
(bnc#863749)
-------------------------------------------------------------------
Tue Feb 4 05:18:48 UTC 2014 - nfbrown@suse.com

5
nfs-utils.spec
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@ -81,8 +81,10 @@ Patch8: mountd-fix-bug-affecting-exports-of-dirs-with-64bit-.patch
Patch9: exportfs-exit-with-error-code-if-there-was-any-error.patch
# PATCH-FIX_UPSTREAM exportfs-report-failure-if-asked-to-unexport-somethi.patch nfbrown@suse.de
Patch10: exportfs-report-failure-if-asked-to-unexport-somethi.patch
# PATCH-FIX-UPSTRAM gssd-mount-hang-fix bnc#833543 nfbrown@suse.de
# PATCH-FIX-UPSTREAM gssd-mount-hang-fix bnc#833543 nfbrown@suse.de
Patch11: gssd-mount-hang-fix
# PATCH-FIX-UPSTREAM udp-fallback.fix bnc#863749 nfbrown@suse.de
Patch12: udp-fallback.fix
Suggests: python-base
%description
@ -145,6 +147,7 @@ This package contains additional NFS documentation.
%patch9 -p1
%patch10 -p1
%patch11 -p1
%patch12 -p1
cp %{S:6} .
%build

36
udp-fallback.fix Normal file
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@ -0,0 +1,36 @@
From: NeilBrown <neilb@suse.de>
Subject: Fix fallback from tcp to udp
References: bnc#863749
Protocol negotiation in mount.nfs does not correctly negotiate with a
server which only support NFSv3 and UDP.
When mount.nfs attempts an NFSv4 mount and fails with ECONNREFUSED
it does not fall back to NFSv3, as this is not recognised as a
"does not support NFSv4" error.
However ECONNREFUSED is a clear indication that the server doesn't
support TCP, and ipso facto does not support NFSv4.
So ECONNREFUSED should trigger a fallback from v4 to v2/3.
Once we allow that error, NFSv3 is attempted and mount.nfs talks to
rpcbind and discovers that UDP should be used for v3 and the mount
succeeds.
Signed-off-by: NeilBrown <neilb@suse.de>
Reported-by: Carsten Ziepke <kieltux@gmail.com>
---
utils/mount/stropts.c | 3 +++
1 file changed, 3 insertions(+)
--- nfs-utils-1.2.8.orig/utils/mount/stropts.c
+++ nfs-utils-1.2.8/utils/mount/stropts.c
@@ -807,6 +807,9 @@ static int nfs_autonegotiate(struct nfsm
/* Linux servers prior to 2.6.25 may return
* EPERM when NFS version 4 is not supported. */
goto fall_back;
+ case ECONNREFUSED:
+ /* UDP-Only server won't support v4 */
+ goto fall_back;
default:
return result;
}