Add a Python test for the basic ops.
# ./net/nl_netdev.py
KTAP version 1
1..3
ok 1 nl_netdev.empty_check
ok 2 nl_netdev.lo_check
ok 3 nl_netdev.page_pool_check
# Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
---
tools/testing/selftests/net/lib/py/nsim.py | 7 ++
tools/testing/selftests/net/nl_netdev.py | 79 +++++++++++++++++++++-
2 files changed, 84 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/net/lib/py/nsim.py b/tools/testing/selftests/net/lib/py/nsim.py
index 94aa32f59fdb..1fd50a308408 100644
--- a/tools/testing/selftests/net/lib/py/nsim.py
+++ b/tools/testing/selftests/net/lib/py/nsim.py
@@ -28,6 +28,13 @@ from .utils import cmd, ip
self.dfs_dir = "%s/ports/%u/" % (nsimdev.dfs_dir, port_index)
ret = ip("-j link show dev %s" % ifname, ns=ns)
self.dev = json.loads(ret.stdout)[0]
+ self.ifindex = self.dev["ifindex"]
+
+ def up(self):
+ ip("link set dev {} up".format(self.ifname))
+
+ def down(self):
+ ip("link set dev {} down".format(self.ifname))
def dfs_write(self, path, val):
self.nsimdev.dfs_write(f'ports/{self.port_index}/' + path, val)
diff --git a/tools/testing/selftests/net/nl_netdev.py b/tools/testing/selftests/net/nl_netdev.py
index 2b8b488fb419..afc510c044ce 100755
--- a/tools/testing/selftests/net/nl_netdev.py
+++ b/tools/testing/selftests/net/nl_netdev.py
@@ -1,7 +1,8 @@
#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
-from lib.py import ksft_run, ksft_pr, ksft_eq, ksft_ge, NetdevFamily
+import time
+from lib.py import ksft_run, ksft_pr, ksft_eq, ksft_ge, NetdevFamily, NetdevSimDev, ip
def empty_check(nf) -> None:
@@ -15,9 +16,83 @@ from lib.py import ksft_run, ksft_pr, ksft_eq, ksft_ge, NetdevFamily
ksft_eq(len(lo_info['xdp-rx-metadata-features']), 0)
+def page_pool_check(nf) -> None:
+ with NetdevSimDev() as nsimdev:
+ nsim = nsimdev.nsims[0]
+
+ # No page pools when down
+ nsim.down()
+ pp_list = nf.page_pool_get({}, dump=True)
+ pp_list = [pp for pp in pp_list if pp.get("ifindex") == nsim.ifindex]
+ ksft_eq(len(pp_list), 0)
+
+ # Up, empty page pool appears
+ nsim.up()
+ pp_list = nf.page_pool_get({}, dump=True)
+ pp_list = [pp for pp in pp_list if pp.get("ifindex") == nsim.ifindex]
+ ksft_ge(len(pp_list), 0)
+ refs = sum([pp["inflight"] for pp in pp_list])
+ ksft_eq(refs, 0)
+
+ # Down, it disappears, again
+ nsim.down()
+ pp_list = nf.page_pool_get({}, dump=True)
+ pp_list = [pp for pp in pp_list if pp.get("ifindex") == nsim.ifindex]
+ ksft_eq(len(pp_list), 0)
+
+ # Up, allocate a page
+ nsim.up()
+ nsim.dfs_write("pp_hold", "y")
+ pp_list = nf.page_pool_get({}, dump=True)
+ refs = sum([pp["inflight"] for pp in pp_list if pp.get("ifindex") == nsim.ifindex])
+ ksft_ge(refs, 1)
+
+ # Now let's leak a page
+ nsim.down()
+ pp_list = nf.page_pool_get({}, dump=True)
+ pp_list = [pp for pp in pp_list if pp.get("ifindex") == nsim.ifindex]
+ ksft_eq(len(pp_list), 1)
+ refs = sum([pp["inflight"] for pp in pp_list if pp.get("ifindex") == nsim.ifindex])
+ ksft_eq(refs, 1)
+ undetached = [pp for pp in pp_list if "detach-time" not in pp]
+ ksft_eq(len(undetached), 0)
+
+ # New pp can get created, and we'll have two
+ nsim.up()
+ pp_list = nf.page_pool_get({}, dump=True)
+ pp_list = [pp for pp in pp_list if pp.get("ifindex") == nsim.ifindex]
+ attached = [pp for pp in pp_list if "detach-time" not in pp]
+ undetached = [pp for pp in pp_list if "detach-time" in pp]
+ ksft_eq(len(attached), 1)
+ ksft_eq(len(undetached), 1)
+
+ # Free the old page and the old pp is gone
+ nsim.dfs_write("pp_hold", "n")
+ # Freeing check is once a second so we may need to retry
+ for i in range(50):
+ pp_list = nf.page_pool_get({}, dump=True)
+ pp_list = [pp for pp in pp_list if pp.get("ifindex") == nsim.ifindex]
+ if len(pp_list) == 1:
+ break
+ time.sleep(0.05)
+ ksft_eq(len(pp_list), 1)
+
+ # And down...
+ nsim.down()
+ pp_list = nf.page_pool_get({}, dump=True)
+ pp_list = [pp for pp in pp_list if pp.get("ifindex") == nsim.ifindex]
+ ksft_eq(len(pp_list), 0)
+
+ # Last, leave the page hanging for destroy, nothing to check
+ # we're trying to exercise the orphaning path in the kernel
+ nsim.up()
+ nsim.dfs_write("pp_hold", "y")
+
+
def main() -> None:
nf = NetdevFamily()
- ksft_run([empty_check, lo_check], args=(nf, ))
+ ksft_run([empty_check, lo_check, page_pool_check],
+ args=(nf, ))
if __name__ == "__main__":
--
2.44.0
