[LU-16415] Lustre quota enforcement for root files in project quota

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Sergey Cheremencev
• Reporter: Sergey Cheremencev

Description

Quota project enforcement doesn't work for root.  

# mkdir /mnt/lustre/testdir
# chmod 777 /mnt/lustre/testdir# lfs project -p 10 -s /mnt/lustre/testdir
# lfs setquota -B 200M -p 10 /mnt/lustre/
# lfs quota -p 10 /mnt/lustre/
Disk quotas for prj 10 (pid 10):
     Filesystem  kbytes   quota   limit   grace   files   quota   limit   grace
    /mnt/lustre       4       0  204800       -       1       0       0       -
# id
uid=0(root) gid=0(root) groups=0(root)# dd if=/dev/zero of=/mnt/lustre/testdir/file bs=1M count=300
300+0 records in
300+0 records out
314572800 bytes (315 MB, 300 MiB) copied, 0.21125 s, 1.5 GB/s
# lfs quota -p 10 /mnt/lustre
Disk quotas for prj 10 (pid 10):
     Filesystem  kbytes   quota   limit   grace   files   quota   limit   grace
    /mnt/lustre  307112*      0  204800       -       2       0       0       -
pid 10 is using default file quota setting$ id
uid=8888(serega) gid=100(users) groups=100(users)
$ dd if=/dev/zero of=/mnt/lustretestdir/file bs=1M count=300
dd: error writing '/mnt/lustre/testdir/file': Disk quota exceeded
229+0 records in
228+0 records out
239075328 bytes (239 MB, 228 MiB) copied, 0.182616 s, 1.3 GB/s[root@ec01 ~]# lfs quota -p 10 /mnt/lustre
Disk quotas for prj 10 (pid 10):
     Filesystem  kbytes   quota   limit   grace   files   quota   limit   grace
    /mnt/lustre  233480*      0  204800       -       2       0       0       -
pid 10 is using default file quota setting