du result is smaller than xfs_quota report

[Dave Chinner]

On Wed, Oct 21, 2015 at 02:37:04PM +0800, YeYin wrote:
> > Is anything mounted under that directory hierarchy, and hiding files from du's view?
> 
> 
> No, Thanks. I found some unlinked inodes, but I can't get some useful information:
> 
> 
> # xfs_db -xr -c 'agi 1' -c p /dev/sda4  
....
> unlinked[0-63] = 0:78272 ....

> # xfs_db -xr -c 'inode 78272' -c p /dev/sda4

That's because 78272 isn't an real inode number. It's a AG relative
inode number ("agino") of 78272. The global inode number folds in
the AG number to it, and this is from AG 1. So:

xfs_db> convert agno 1 agino 78272 ino
<inum>
xfs_db> inode <inum>
xfs_db> p
....

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com