ZFS: Panic when attempting to delete certain data

[Josh Beard]

On Wed, Nov 28, 2012 at 1:47 AM, Andriy Gapon <avg at freebsd.org> wrote:

> on 27/11/2012 23:47 Josh Beard said the following:
> > Thanks!  Here we go:
> >
> > (kgdb) frame 7
> > #7  0xffffffff80ebd45a in zfs_freebsd_remove (ap=Variable "ap" is not
> available.
> > ) at
> >
> /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c:1855
> > 1855                    dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
> > (kgdb) list
> > 1850                &xattr_obj, sizeof (xattr_obj));
> > 1851            if (error == 0 && xattr_obj) {
> > 1852                    error = zfs_zget(zfsvfs, xattr_obj, &xzp);
> > 1853                    ASSERT3U(error, ==, 0);
> > 1854                    dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE);
> > 1855                    dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
> > 1856            }
> > 1857
> > 1858            mutex_enter(&zp->z_lock);
> > 1859            if ((acl_obj = zfs_external_acl(zp)) != 0 &&
> may_delete_now)
>
> That's what I suspected.
>
> > (kgdb) frame 7
> > #7  0xffffffff80ebd45a in zfs_freebsd_remove (ap=Variable "ap" is not
> available.
> > ) at
> >
> /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c:1855
> > 1855                    dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE);
> > (kgdb) info local
> > No locals.
> > (kgdb)
>
> A little bit unfortunate.
>
> > # ls -Pi /DSDK12_NHR.pax.gz  (symlink to ../Archive.pax.gz)
> > 249868
> >
> ./Imaging/Packages/DSDK12_NHR_2012-02-23.pkg/Contents/Resources/DSDK12_NHR.pax.gz
> >
> > # zdb -ddddd store/tdxs1 249868
> > Dataset store/tdxs1 [ZPL], ID 109, cr_txg 35014, 1.33T, 1106389 objects,
> rootbp
> > DVA[0]=<0:8000204400:400> DVA[1]=<0:30800644400:400> [L0 DMU objset]
> fletcher4
> > lzjb LE contiguous unique double size=800L/200P birth=1167710L/1167710P
> > fill=1106389 cksum=1966704b59:757ae6cb615:134bfd597bca9:254b2ee348393d
> >
> >     Object  lvl   iblk   dblk  dsize  lsize   %full  type
> >     249868    1    16K    512      0    512    0.00  ZFS plain file
> >                                         201   bonus  System attributes
> >         dnode flags: USERUSED_ACCOUNTED
> >         dnode maxblkid: 0
> >         path
> >
>  /tech/2012-09-14-01-00/Imaging/Packages/DSDK12_NHR_2012-02-23.pkg/Contents/Resources/DSDK12_NHR.pax.gz
> >         uid     300002
> >         gid     80
> >         atime   Tue Nov 27 14:43:00 2012
> >         mtime   Thu Feb 23 08:59:21 2012
> >         ctime   Fri Sep 14 01:12:37 2012
> >         crtime  Fri Sep 14 01:11:50 2012
> >         gen     81430
> >         mode    120755
> >         size    17
> >         parent  249866
> >         links   1
> >         pflags  40800000104
> >         xattr   230
>
>
> Could you please now run 'zdb -ddddd store/tdxs1 230' ?
>
> --
> Andriy Gapon
>

# zdb -ddddd store/tdxs1 230
Dataset store/tdxs1 [ZPL], ID 109, cr_txg 35014, 1.33T, 1106389 objects,
rootbp DVA[0]=<0:8000284800:400> DVA[1]=<0:308006b3800:400> [L0 DMU objset]
fletcher4 lzjb LE contiguous unique double size=800L/200P
birth=1167748L/1167748P fill=1106389
cksum=16e1e08cb8:70a50f1ec5a:13419c71d1cda:260fbed28af8f5

    Object  lvl   iblk   dblk  dsize  lsize   %full  type
zdb: dmu_bonus_hold(230) failed, errno 2