Examine the quota inodes.

# xfs_db -xr /dev/hdb1
xfs_db: sb 0
xfs_db: p
...
uquotino = null
pquotino = 132

xfs_db: inode 132
xfs_db: p
...

Examine the quota entries.

xfs_db: dquot -p testproject
xfs_db: p
diskdq.magic = 0x4451
diskdq.version = 0x1
diskdq.flags = 0x2
diskdq.id = 33
diskdq.blk_hardlimit = 2560
diskdq.blk_softlimit = 1280
diskdq.ino_hardlimit = 0
diskdq.ino_softlimit = 0
diskdq.bcount = 1
diskdq.icount = 2
diskdq.itimer = 0
diskdq.btimer = 0
diskdq.iwarns = 0
diskdq.bwarns = 0
diskdq.rtb_hardlimit = 0
diskdq.rtb_softlimit = 0
diskdq.rtbcount = 0
diskdq.rtbtimer = 0
diskdq.rtbwarns = 0

Examine inodes of quota controlled files/directories

# cd /mnt/xfstest/a
# ls > testfile
# ls -ia
  133 .     128 ..    135 testfile

# sudo xfs_db -xr /dev/hdb1
xfs_db: inode 133
xfs_db: p
...
core.projid = 33
core.uid = 0
core.gid = 0
...