def test_path_lookup_bind_mount(self):
with tempfile.NamedTemporaryFile(prefix="drgn-tests-") as f:
old_mnt = path_lookup(self.prog, os.path.abspath(f.name)).mnt
mount(f.name, f.name, "", MS_BIND, "")
try:
new_mnt = path_lookup(self.prog, os.path.abspath(f.name)).mnt
self.assertNotEqual(old_mnt, new_mnt)
finally:
umount(f.name)
def test_inode_paths(self):
with tempfile.TemporaryDirectory(prefix="drgn-tests-") as dir:
path1 = os.fsencode(os.path.abspath(os.path.join(dir, "a")))
path2 = os.fsencode(os.path.abspath(os.path.join(dir, "b")))
with open(path1, "w") as f:
os.link(path1, path2)
with open(path2, "r") as f:
inode = path_lookup(self.prog, path1).dentry.d_inode
paths = list(inode_paths(inode))
self.assertEqual(len(paths), 2)
self.assertTrue(
(path1.endswith(paths[0]) and path2.endswith(paths[1]))
or (path1.endswith(paths[1]) and path2.endswith(paths[0]))
)
self.assertIn(inode_path(inode), paths)
def test_qdisc_lookup(self):
try:
self.ns.link("add", ifname="dummy0", kind="dummy")
except NetlinkError:
self.skipTest(
"kernel does not support dummy interface (CONFIG_DUMMY)")
dummy = self.ns.link_lookup(ifname="dummy0")[0]
# tc qdisc add dev dummy0 root handle 1: prio
try:
self.ns.tc(
"add",
kind="prio",
index=dummy,
handle="1:",
# default TCA_OPTIONS for sch_prio, see [iproute2] tc/q_prio.c:prio_parse_opt()
bands=3,
priomap=[1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1],
)
except NetlinkError:
self.ns.link("delete", ifname="dummy0")
self.skipTest(
"kernel does not support Multi Band Priority Queueing (CONFIG_NET_SCH_PRIO)"
)
# tc qdisc add dev dummy0 parent 1:1 handle 10: sfq
try:
self.ns.tc("add",
kind="sfq",
index=dummy,
parent="1:1",
handle="10:")
except NetlinkError:
self.ns.link("delete", ifname="dummy0")
self.skipTest(
"kernel does not support Stochastic Fairness Queueing (CONFIG_NET_SCH_SFQ)"
)
# tc qdisc add dev dummy0 parent 1:2 handle 20: tbf rate 20kbit buffer 1600 limit 3000
try:
self.ns.tc(
"add",
kind="tbf",
index=dummy,
parent="1:2",
handle="20:",
rate=2500,
burst=1600,
limit=3000,
)
except NetlinkError:
self.ns.link("delete", ifname="dummy0")
self.skipTest(
"kernel does not support Token Bucket Filter (CONFIG_NET_SCH_TBF)"
)
# tc qdisc add dev dummy0 parent 1:3 handle 30: sfq
self.ns.tc("add", kind="sfq", index=dummy, parent="1:3", handle="30:")
# tc qdisc add dev dummy0 ingress
try:
self.ns.tc("add", kind="ingress", index=dummy)
except NetlinkError:
self.ns.link("delete", ifname="dummy0")
self.skipTest(
"kernel does not support ingress Qdisc (CONFIG_NET_SCH_INGRESS)"
)
inode = path_lookup(
self.prog,
os.path.realpath(f"/var/run/netns/{self.name}")).dentry.d_inode
netdev = netdev_get_by_name(get_net_ns_by_inode(inode), "dummy0")
self.assertEqual(qdisc_lookup(netdev, 0x1).ops.id.string_(), b"prio")
self.assertEqual(qdisc_lookup(netdev, 0x10).ops.id.string_(), b"sfq")
self.assertEqual(qdisc_lookup(netdev, 0x20).ops.id.string_(), b"tbf")
self.assertEqual(qdisc_lookup(netdev, 0x30).ops.id.string_(), b"sfq")
self.assertEqual(
qdisc_lookup(netdev, 0xFFFF).ops.id.string_(), b"ingress")
self.ns.link("delete", ifname="dummy0")
def test_path_lookup(self):
with tempfile.NamedTemporaryFile(prefix="drgn-tests-") as f:
path = path_lookup(self.prog, os.path.abspath(f.name))
self.assertEqual(
path.dentry.d_name.name.string_(), os.fsencode(os.path.basename(f.name))
)
