xfs_quota_native_c.py

# /root/xfsprogs-3.1.9ubuntu2/include/xqm.h                       
# (('X'<<8)+(1)) | (('X'<<8)+(3))                       
# use strace to get above numbers: strace xfs_quota

#!/usr/bin/env python
# get quota information from XFS
import sys
from pwd import getpwnam
from ctypes import *
libc = cdll.LoadLibrary('libc.so.6')

# see xfs/xqm.h
class fs_disk_quota_t(Structure):
  _fields_ = [
  ("d_version", c_char),
  ("d_flags", c_char),
  ("d_fieldmask", c_ushort),
  ("d_id", c_uint32),
  ("d_blk_hardlimit", c_uint64),
  ("d_blk_softlimit", c_uint64),
  ("d_ino_hardlimit", c_uint64),
  ("d_ino_softlimit", c_uint64),
  ("d_bcount", c_uint64),
  ("d_icount", c_uint64),
  ("d_itimer", c_int32),
  ("d_btimer", c_int32),
  ("d_iwarns", c_uint16),
  ("d_bwarns", c_uint16),
  ("d_padding2", c_int32),
  ("d_rtb_hardlimit", c_uint64),
  ("d_rtb_softlimit", c_uint64),
  ("d_rtbcount", c_uint64),
  ("d_rtbtimer", c_int32),
  ("d_rtbwarns", c_uint16),
  ("d_padding3", c_int16),
  ("d_padding4", c_char * 8)
  ]

output = fs_disk_quota_t()

quota = libc.quotactl
quota.argtypes = [c_int, c_char_p, c_int, c_void_p]
quota.restype = c_int

uid = c_int(getpwnam(sys.argv[1])[2])
cmd = c_int(5767936) # Q_XGETQUOTA|USRQUOTA
ptr = pointer(output)

if quota(cmd, "/dev/mapper/vg0-storage", uid, ptr) == -1:
  print "Something went wrong!!"
  exit(1)