Re: [PATCH] xfs/424: test xfs_db to ensure type size taken into account with new type

Bill O'Donnell
2017-07-14T19:58:39Z

On Fri, Jul 14, 2017 at 02:11:01PM -0500, Bill O'Donnell wrote:
> On Fri, Jul 14, 2017 at 02:01:31PM -0500, Eric Sandeen wrote:
> >
> >
> > On 07/14/2017 11:47 AM, Bill O'Donnell wrote:
> > > On Fri, Jul 14, 2017 at 10:42:57AM -0500, Eric Sandeen wrote:
> >
> >
> > >>> +# for different sector sizes, ensure no CRC errors are falsely reported
> > >>> +
> > >>> +# Supported types include: agf, agfl, agi, attr3, bmapbta,
> > >>> +# bmapbtd, bnobt, cntbt, data, dir3, dqblk, inobt, inodata,
> > >>> +# inode, log, rtbitmap, rtsummary, sb, symlink, text, finobt.
> > >>
> > >> This leaves me wondering why we don't test most of the above ;)
> > >>
> > >>> +# For various sector sizes, test some types that involve type size.
> > >>> +for SECTOR_SIZE in 512 1024 2048 4096; do
> > >>> + $MKFS_XFS_PROG -f -s size=$SECTOR_SIZE $SCRATCH_DEV > /dev/null
> > >>> + for TYPE in agf agi agfl sb; do
> > >>> + DADDR=`$XFS_DB_PROG -c "$TYPE" -c "daddr" $SCRATCH_DEV | _filter_dbval`
> > >>> + $XFS_DB_PROG -c "$TYPE" -c "daddr 42" -c "daddr $DADDR" -c "type $TYPE" $SCRATCH_DEV
> > >>
> > >> Hm is there a reason for the first "-c $TYPE" or even the "daddr 42" in the line just above?
> > > It's drawn from the reproducer test case.
> > > The first "-c $TYPE" sets the object, "daddr 42" is an arbitrary address set. Without
> > > the daddr change and change-back, the test will pass even without the recent xfs_db
> > > xfsprogs change.
> >
> > Really? Not here, xfsprogs-4.5.0 :
> >
> > # xfs_db -c "daddr 2" -c "type agi" fsfile
> > Metadata CRC error detected at xfs_agi block 0x2/0x200
>
> Ahh, ok, you're correct - I'll modify the test accordingly.

Wait. I still think the object has to get set with "-c $TYPE". If not
the crc error occurs even with the new xfs_db code:
# xfs_db -V
xfs_db version 4.12.0-rc2
# xfs_db /dev/sda6
xfs_db> daddr
current daddr is 0
xfs_db> daddr 2
xfs_db> type agi
Metadata CRC error detected at xfs_agi block 0x2/0x1000
Metadata CRC error detected at xfs_agi block 0x2/0x1000

And error is gone when the object is set and the daddr gets
set to the correct value.
[root@localhost xfsprogs-dev3]# xfs_db /dev/sda6
xfs_db> agi
xfs_db> daddr
current daddr is 16
xfs_db> daddr 2
xfs_db> daddr 16
xfs_db> type agi

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