ifs quota for root

# mount|grep -i xfs
/dev/loop1 on /var/tmp type xfs (rw,quota,uquota)

# xfs_quota -x -c 'state' /dev/loop1
User quota state on /var/tmp (/dev/loop1)
  Accounting: ON
  Enforcement: ON
  Inode: #131 (1 blocks, 1 extents)
Group quota state on /var/tmp (/dev/loop1)
  Accounting: OFF
  Enforcement: OFF
  Inode: #0 (0 blocks, 0 extents)
Project quota state on /var/tmp (/dev/loop1)
  Accounting: OFF
  Enforcement: OFF
  Inode: #0 (0 blocks, 0 extents)
Blocks grace time: [7 days 00:00:30]
Inodes grace time: [7 days 00:00:30]
Realtime Blocks grace time: [7 days 00:00:30]

# xfs_quota -x -c 'limit bsoft=200m bhard=200m root' /dev/loop1

# quota -u
Disk quotas for user root (uid 0):
     Filesystem  blocks   quota   limit   grace   files   quota   limit   grace
     /dev/loop1       0  204800  204800               3       0       0

# dd if=/dev/zero of=/var/tmp/test2 bs=1M count=302
302+0 records in
302+0 records out
316669952 bytes (317 MB) copied, 0.667244 s, 475 MB/s

# quota -u
Disk quotas for user root (uid 0):
     Filesystem  blocks   quota   limit   grace   files   quota   limit   grace
     /dev/loop1  309248* 204800  204800               4       0       0