Submitter : ivanr Status : open
Assigned Engineer : dxm Priority : 1
*Modified Date : 09/11/00 *Modified User : jones
*Modified User Domain : tacc.cc.utexas.edu
*Description :
QA for xfsdump/xfsrestore revealed that it is possible for
xfsdump to cause filesystem corruption. The test involves
creating a filesystem, creating a whole buncha files, xfsdumping
them to a file somewhere, then removing all the files. xfs_check
reports lots of inodes with zero link counts, etc. It's probably
due to xfsdump using bulkstat on the entire fs.
The following is a script which will reliably (at least on
bruce.melbourne) produce the error. Run it in cmd/xfs/stress -
it needs the src/fill program, and make sure you fix the
.....
==========================
ADDITIONAL INFORMATION (ADD)
From: "william l. jones" <jones@xxxxxxxxxxxxxxxxxx>
Date: Sep 11 2000 08:05:04AM
[pvnews version: 1.71]
==========================
At 11:15 PM 9/10/00 -0700, you wrote:
>View Incident:
>http://co-op.engr.sgi.com/BugWorks/code/bwxquery.cgi?search=Search&wlong=1&;
>view_type=Bug&wi=801241
>
> Status : open Priority : 1
> Assigned Engineer : dxm Submitter : ivanr
>*Modified User : dxm *Modified User Domain : engr
>*Description :
>QA for xfsdump/xfsrestore revealed that it is possible for
>xfsdump to cause filesystem corruption. The test involves
>creating a filesystem, creating a whole buncha files, xfsdumping
>them to a file somewhere, then removing all the files. xfs_check
>reports lots of inodes with zero link counts, etc. It's probably
>due to xfsdump using bulkstat on the entire fs.
>
>The following is a script which will reliably (at least on
>bruce.melbourne) produce the error. Run it in cmd/xfs/stress -
>it needs the src/fill program, and make sure you fix the
>
>.....
>
>
>==========================
>ADDITIONAL INFORMATION (ADD)
>From: dxm@engr (BugWorks)
>Date: Sep 10 2000 11:15:42PM
>==========================
>
>xfs_open_by_handle is causing some kind of reference leak
>which means deleted files stay in the agi_unlinked list
>when the FS is unmounted instead of being passed to
>xfs_iunlink_remove when their count hits zero
>(ie before unmount).
>
>I've added qa 034 which isolates this bug...
You should also add bulk_stat_single to the list of suspects.
Bill Jones
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