Re: missing files in readdir(3) on NFS export of ZFS volume (since v28?)

From: Olivier Smedts <olivier_at_gid0.org>
Date: Tue, 8 Mar 2011 15:56:44 +0100
2011/3/7 Pierre Beyssac <pb_at_fasterix.frmug.org>:
> Hello,
>
> I'm running a 9-current server as compiled on Sat Mar  5 02:17:14
> CET 2011.
>
> Since I upgraded to ZFS v28 I noticed missing files from NFS. The
> files are still accessible through NFS but they don't show up on a
> readdir(3).
>
> On the NFS server (files are stored on a ZFS v15 volume, not yet
> upgraded to the v28 format):
>
> % cd /usr/ports/devel/autoconf
> % ls -i
> 311401 Makefile         204505 files            204509 pkg-plist
> 204504 distinfo         204508 pkg-descr
>
> On the NFS client side (FreeBSD 8.2-RELEASE):
>
> % cd /usr/ports/devel/autoconf
> % ls -i
> 204504 distinfo         204508 pkg-descr
> 204505 files            204509 pkg-plist
>
> Yet the missing file can be accessed:
> % head -3 Makefile
> # New ports collection makefile for:    autoconf
> # Date created:         7th December 2006
> # Whom:                 ade_at_FreeBSD.org

I have the same behavior for files or even complete dirs in my linux
jails. The files are visible on the host computer (FreeBSD 9-CURRENT
amd64 with v28 ZFS root pool), but if I chroot in the linux jail (so
now it's not a jail but only a chroot running linux binaries), I can't
"ls" them. I can provide more details but I'm not in front of my
computer right now. What do you need ?

>
> Note that the missing files are scattered throughout the volume,
> no relation to the inode number, as shown on a diff:
>
> _at__at_ -1,8 +1,6 _at__at_
>      3        7 drwxr-xr-x   70 pb               staff                  93  4 mar 19:11 /usr/ports
> -     4        2 -rw-r--r--    1 pb               staff                 241 24 jan  2007 /usr/ports/astro/tclgeomap/pkg-plist
>      5        3 drwxr-xr-x    2 pb               staff                   6 22 fév 12:04 /usr/ports/astro/tkgeomap
>      6        3 drwxr-xr-x    4 pb               staff                   6 29 jul  2008 /usr/ports/Tools
> -     7        5 drwxr-xr-x   33 pb               staff                  34 25 nov 15:59 /usr/ports/accessibility
>      8        3 drwxr-xr-x   12 pb               staff                  14  9 fév  2009 /usr/ports/arabic
>     11       51 drwxr-xr-x  900 pb               staff                 901  6 mar 14:36 /usr/ports/audio
>     12        3 -rw-r--r--    1 pb               staff                 584 25 aoû  2006 /usr/ports/astro/tkgeomap/pkg-descr
> _at__at_ -16,10 +14,8 _at__at_
>     23        3 drwxr-xr-x    3 pb               staff                   7 24 mar  2010 /usr/ports/astro/wcslib
>     24        4 -rw-r--r--    1 pb               staff                1414  5 jan  2010 /usr/ports/astro/wcslib/Makefile
>     25        5 drwxr-xr-x   31 pb               staff                  33  1 jan 23:16 /usr/ports/french
> -    26        2 -rw-r--r--    1 pb               staff                 197  5 jan  2010 /usr/ports/astro/wcslib/distinfo
>     27       63 drwxr-xr-x  1110 pb               staff                1111 23 fév 15:37 /usr/ports/games
>     28        3 drwxr-xr-x    2 pb               staff                   4 24 mar  2010 /usr/ports/astro/wcslib/files
> -    29        2 -rw-r--r--    1 pb               staff                 236  5 jan  2010 /usr/ports/astro/wcslib/files/6-patch-configure
>     30        3 -rw-r--r--    1 pb               staff                 677  5 jan  2010 /usr/ports/astro/wcslib/files/patch-GNUmakefile
>     31        2 -rw-r--r--    1 pb               staff                 401 17 jul  2009 /usr/ports/astro/wcslib/pkg-descr
>     32        4 -rw-r--r--    1 pb               staff                1515  5 jan  2010 /usr/ports/astro/wcslib/pkg-plist
> ...
>
> Reverting to an old 9-current kernel (January 10, before the ZFS
> v28 patches) fixes the problem...
> --
> Sent from my FreeBSD server
> Pierre Beyssac                          pb_at_fasterix.frmug.org
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-- 
Olivier Smedts                                                 _
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Received on Tue Mar 08 2011 - 13:56:45 UTC

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