Bug 244949 - [NetApp-N 5.1 bug] umount utility
Summary: [NetApp-N 5.1 bug] umount utility
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel   
(Show other bugs)
Version: 5.0
Hardware: All Linux
Target Milestone: ---
: ---
Assignee: Steve Dickson
QA Contact:
Keywords: OtherQA, Regression
Depends On:
Blocks: 217207
TreeView+ depends on / blocked
Reported: 2007-06-20 00:36 UTC by Bikash
Modified: 2009-06-19 22:59 UTC (History)
4 users (show)

Fixed In Version: RHBA-2007-0959
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-11-07 19:53:36 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2007:0959 normal SHIPPED_LIVE Updated kernel packages for Red Hat Enterprise Linux 5 Update 1 2007-11-08 00:47:37 UTC

Description Bikash 2007-06-20 00:36:34 UTC
Although the umount utility has been fixedin RHEL5, a new problem has been 
introduced.  The NFS kernel client module was changed by commit: 
   "NFS: Share NFS superblocks per-protocol per-server per-FSID" 
This change removed a check in nfs_umount_begin that is meant to kill the
outstanding RPC tasks if MNT_FORCE is specified.

I have contacted RedHat and they requested that we open a Bugzilla report to
request a fix for this latest kernel patch.  The required change follows:

 fs/nfs/super.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index ca20d3c..abb4a35 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -430,7 +430,20 @@ static int nfs_show_stats(struct seq_file *m, struct 
vfsmount *mnt)
 static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
+	struct nfs_server *server = NFS_SB(vfsmnt->mnt_sb);
+	struct rpc_clnt *rpc;
 	shrink_submounts(vfsmnt, &nfs_automount_list);
+	if (!(flags & MNT_FORCE))
+		return;
+	/* -EIO all pending I/O */
+	rpc = server->client_acl;
+	if (!IS_ERR(rpc))
+		rpc_killall_tasks(rpc);
+	rpc = server->client;
+	if (!IS_ERR(rpc))
+		rpc_killall_tasks(rpc);

Comment 2 RHEL Product and Program Management 2007-06-21 17:03:57 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update

Comment 6 Don Zickus 2007-07-23 16:17:50 UTC
in 2.6.18-36.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5

Comment 8 Mike Gahagan 2007-08-01 17:46:14 UTC
I can confirm the patch to fix this is in the -36.el5 kernel.

Comment 10 errata-xmlrpc 2007-11-07 19:53:36 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


Note You need to log in before you can comment on or make changes to this bug.