XFS specific system calls (xfsctl()) are dispatched by xfs_ioctl()
Can be exercised with xfs_io
geometry, fscounts, [get|set]resblks, shutdown, freeze/thaw
grow[fs|fslog|fsrt]
[get|set]xflags, fs[get|set]xattr, fs[get|set]xattra, dioinfo
allocsp, freesp, resvsp, unresvsp
bulkstat
xfsdump, quotacheck, dmapi
by-handle (open, fd-to-, path-to-, readlink, attrlist, attrmulti, ...)
manipulating inodes by “handles” (inum/igen/fsid)
getbmap, getbmapa, swapext
