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  3. [PATCH net-next v5 0/5] net: Improve netns handling in RTNL and ip_tunnel
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[PATCH net-next v5 5/5] selftests: net: Add two test cases for link netns

Xiao Liang posted 5 patches 1 year ago
[PATCH net-next v5 5/5] selftests: net: Add two test cases for link netns
Posted by Xiao Liang 1 year ago 
 - Add test for creating link in another netns when a link of the same
   name and ifindex exists in current netns.
 - Add test for link netns atomicity - create link directly in target
   netns, and no notifications should be generated in current netns.

Signed-off-by: Xiao Liang <shaw.leon@gmail.com>
---
 tools/testing/selftests/net/Makefile        |  1 +
 tools/testing/selftests/net/netns-name.sh   | 10 ++++++
 tools/testing/selftests/net/netns_atomic.py | 39 +++++++++++++++++++++
 3 files changed, 50 insertions(+)
 create mode 100755 tools/testing/selftests/net/netns_atomic.py

diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index cb2fc601de66..f9f7a765d645 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -34,6 +34,7 @@ TEST_PROGS += gre_gso.sh
 TEST_PROGS += cmsg_so_mark.sh
 TEST_PROGS += cmsg_time.sh cmsg_ipv6.sh
 TEST_PROGS += netns-name.sh
+TEST_PROGS += netns_atomic.py
 TEST_PROGS += nl_netdev.py
 TEST_PROGS += srv6_end_dt46_l3vpn_test.sh
 TEST_PROGS += srv6_end_dt4_l3vpn_test.sh
diff --git a/tools/testing/selftests/net/netns-name.sh b/tools/testing/selftests/net/netns-name.sh
index 6974474c26f3..0be1905d1f2f 100755
--- a/tools/testing/selftests/net/netns-name.sh
+++ b/tools/testing/selftests/net/netns-name.sh
@@ -78,6 +78,16 @@ ip -netns $NS link show dev $ALT_NAME 2> /dev/null &&
     fail "Can still find alt-name after move"
 ip -netns $test_ns link del $DEV || fail
 
+#
+# Test no conflict of the same name/ifindex in different netns
+#
+ip -netns $NS link add name $DEV index 100 type dummy || fail
+ip -netns $NS link add netns $test_ns name $DEV index 100 type dummy ||
+    fail "Can create in netns without moving"
+ip -netns $test_ns link show dev $DEV >> /dev/null || fail "Device not found"
+ip -netns $NS link del $DEV || fail
+ip -netns $test_ns link del $DEV || fail
+
 echo -ne "$(basename $0) \t\t\t\t"
 if [ $RET_CODE -eq 0 ]; then
     echo "[  OK  ]"
diff --git a/tools/testing/selftests/net/netns_atomic.py b/tools/testing/selftests/net/netns_atomic.py
new file mode 100755
index 000000000000..d350a3fc0a91
--- /dev/null
+++ b/tools/testing/selftests/net/netns_atomic.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+import time
+
+from lib.py import ksft_run, ksft_exit, ksft_true
+from lib.py import ip
+from lib.py import NetNS, NetNSEnter
+from lib.py import RtnlFamily
+
+
+def test_event(ns1, ns2) -> None:
+    with NetNSEnter(str(ns1)):
+        rtnl = RtnlFamily()
+
+    rtnl.ntf_subscribe("rtnlgrp-link")
+
+    ip(f"netns set {ns1} 0", ns=str(ns2))
+
+    ip(f"link add netns {ns2} link-netnsid 0 dummy1 type dummy")
+    ip(f"link add netns {ns2} dummy2 type dummy", ns=str(ns1))
+
+    ip("link del dummy1", ns=str(ns2))
+    ip("link del dummy2", ns=str(ns2))
+
+    time.sleep(1)
+    rtnl.check_ntf()
+    ksft_true(rtnl.async_msg_queue.empty(),
+              "Received unexpected link notification")
+
+
+def main() -> None:
+    with NetNS() as ns1, NetNS() as ns2:
+        ksft_run([test_event], args=(ns1, ns2))
+    ksft_exit()
+
+
+if __name__ == "__main__":
+    main()
-- 
2.47.1
Re: [PATCH net-next v5 5/5] selftests: net: Add two test cases for link netns
Posted by Paolo Abeni 1 year ago 
On 12/9/24 15:01, Xiao Liang wrote:
>  - Add test for creating link in another netns when a link of the same
>    name and ifindex exists in current netns.
>  - Add test for link netns atomicity - create link directly in target
>    netns, and no notifications should be generated in current netns.
> 
> Signed-off-by: Xiao Liang <shaw.leon@gmail.com>
> ---
>  tools/testing/selftests/net/Makefile        |  1 +
>  tools/testing/selftests/net/netns-name.sh   | 10 ++++++
>  tools/testing/selftests/net/netns_atomic.py | 39 +++++++++++++++++++++
>  3 files changed, 50 insertions(+)
>  create mode 100755 tools/testing/selftests/net/netns_atomic.py
> 
> diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
> index cb2fc601de66..f9f7a765d645 100644
> --- a/tools/testing/selftests/net/Makefile
> +++ b/tools/testing/selftests/net/Makefile
> @@ -34,6 +34,7 @@ TEST_PROGS += gre_gso.sh
>  TEST_PROGS += cmsg_so_mark.sh
>  TEST_PROGS += cmsg_time.sh cmsg_ipv6.sh
>  TEST_PROGS += netns-name.sh
> +TEST_PROGS += netns_atomic.py
>  TEST_PROGS += nl_netdev.py
>  TEST_PROGS += srv6_end_dt46_l3vpn_test.sh
>  TEST_PROGS += srv6_end_dt4_l3vpn_test.sh
> diff --git a/tools/testing/selftests/net/netns-name.sh b/tools/testing/selftests/net/netns-name.sh
> index 6974474c26f3..0be1905d1f2f 100755
> --- a/tools/testing/selftests/net/netns-name.sh
> +++ b/tools/testing/selftests/net/netns-name.sh
> @@ -78,6 +78,16 @@ ip -netns $NS link show dev $ALT_NAME 2> /dev/null &&
>      fail "Can still find alt-name after move"
>  ip -netns $test_ns link del $DEV || fail
>  
> +#
> +# Test no conflict of the same name/ifindex in different netns
> +#
> +ip -netns $NS link add name $DEV index 100 type dummy || fail
> +ip -netns $NS link add netns $test_ns name $DEV index 100 type dummy ||
> +    fail "Can create in netns without moving"
> +ip -netns $test_ns link show dev $DEV >> /dev/null || fail "Device not found"
> +ip -netns $NS link del $DEV || fail
> +ip -netns $test_ns link del $DEV || fail
> +
>  echo -ne "$(basename $0) \t\t\t\t"
>  if [ $RET_CODE -eq 0 ]; then
>      echo "[  OK  ]"
> diff --git a/tools/testing/selftests/net/netns_atomic.py b/tools/testing/selftests/net/netns_atomic.py
> new file mode 100755
> index 000000000000..d350a3fc0a91
> --- /dev/null
> +++ b/tools/testing/selftests/net/netns_atomic.py
> @@ -0,0 +1,39 @@
> +#!/usr/bin/env python3
> +# SPDX-License-Identifier: GPL-2.0
> +
> +import time
> +
> +from lib.py import ksft_run, ksft_exit, ksft_true
> +from lib.py import ip
> +from lib.py import NetNS, NetNSEnter
> +from lib.py import RtnlFamily
> +
> +
> +def test_event(ns1, ns2) -> None:
> +    with NetNSEnter(str(ns1)):
> +        rtnl = RtnlFamily()
> +
> +    rtnl.ntf_subscribe("rtnlgrp-link")
> +
> +    ip(f"netns set {ns1} 0", ns=str(ns2))
> +
> +    ip(f"link add netns {ns2} link-netnsid 0 dummy1 type dummy")
> +    ip(f"link add netns {ns2} dummy2 type dummy", ns=str(ns1))
> +
> +    ip("link del dummy1", ns=str(ns2))
> +    ip("link del dummy2", ns=str(ns2))
> +
> +    time.sleep(1)
> +    rtnl.check_ntf()
> +    ksft_true(rtnl.async_msg_queue.empty(),
> +              "Received unexpected link notification")

I think we need a much larger coverage here, possibly testing all the
update drivers and more 'netns', 'link-netnsid', 'peer netns'
permutations for the devices that allow them.

Thanks,

Paolo
Re: [PATCH net-next v5 5/5] selftests: net: Add two test cases for link netns
Posted by Xiao Liang 1 year ago 
On Thu, Dec 12, 2024 at 5:40 PM Paolo Abeni <pabeni@redhat.com> wrote:
>
> On 12/9/24 15:01, Xiao Liang wrote:
> >  - Add test for creating link in another netns when a link of the same
> >    name and ifindex exists in current netns.
> >  - Add test for link netns atomicity - create link directly in target
> >    netns, and no notifications should be generated in current netns.
> >
> > Signed-off-by: Xiao Liang <shaw.leon@gmail.com>
> > ---
> >  tools/testing/selftests/net/Makefile        |  1 +
> >  tools/testing/selftests/net/netns-name.sh   | 10 ++++++
> >  tools/testing/selftests/net/netns_atomic.py | 39 +++++++++++++++++++++
> >  3 files changed, 50 insertions(+)
> >  create mode 100755 tools/testing/selftests/net/netns_atomic.py
> >
> > diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
> > index cb2fc601de66..f9f7a765d645 100644
> > --- a/tools/testing/selftests/net/Makefile
> > +++ b/tools/testing/selftests/net/Makefile
> > @@ -34,6 +34,7 @@ TEST_PROGS += gre_gso.sh
> >  TEST_PROGS += cmsg_so_mark.sh
> >  TEST_PROGS += cmsg_time.sh cmsg_ipv6.sh
> >  TEST_PROGS += netns-name.sh
> > +TEST_PROGS += netns_atomic.py
> >  TEST_PROGS += nl_netdev.py
> >  TEST_PROGS += srv6_end_dt46_l3vpn_test.sh
> >  TEST_PROGS += srv6_end_dt4_l3vpn_test.sh
> > diff --git a/tools/testing/selftests/net/netns-name.sh b/tools/testing/selftests/net/netns-name.sh
> > index 6974474c26f3..0be1905d1f2f 100755
> > --- a/tools/testing/selftests/net/netns-name.sh
> > +++ b/tools/testing/selftests/net/netns-name.sh
> > @@ -78,6 +78,16 @@ ip -netns $NS link show dev $ALT_NAME 2> /dev/null &&
> >      fail "Can still find alt-name after move"
> >  ip -netns $test_ns link del $DEV || fail
> >
> > +#
> > +# Test no conflict of the same name/ifindex in different netns
> > +#
> > +ip -netns $NS link add name $DEV index 100 type dummy || fail
> > +ip -netns $NS link add netns $test_ns name $DEV index 100 type dummy ||
> > +    fail "Can create in netns without moving"
> > +ip -netns $test_ns link show dev $DEV >> /dev/null || fail "Device not found"
> > +ip -netns $NS link del $DEV || fail
> > +ip -netns $test_ns link del $DEV || fail
> > +
> >  echo -ne "$(basename $0) \t\t\t\t"
> >  if [ $RET_CODE -eq 0 ]; then
> >      echo "[  OK  ]"
> > diff --git a/tools/testing/selftests/net/netns_atomic.py b/tools/testing/selftests/net/netns_atomic.py
> > new file mode 100755
> > index 000000000000..d350a3fc0a91
> > --- /dev/null
> > +++ b/tools/testing/selftests/net/netns_atomic.py
> > @@ -0,0 +1,39 @@
> > +#!/usr/bin/env python3
> > +# SPDX-License-Identifier: GPL-2.0
> > +
> > +import time
> > +
> > +from lib.py import ksft_run, ksft_exit, ksft_true
> > +from lib.py import ip
> > +from lib.py import NetNS, NetNSEnter
> > +from lib.py import RtnlFamily
> > +
> > +
> > +def test_event(ns1, ns2) -> None:
> > +    with NetNSEnter(str(ns1)):
> > +        rtnl = RtnlFamily()
> > +
> > +    rtnl.ntf_subscribe("rtnlgrp-link")
> > +
> > +    ip(f"netns set {ns1} 0", ns=str(ns2))
> > +
> > +    ip(f"link add netns {ns2} link-netnsid 0 dummy1 type dummy")
> > +    ip(f"link add netns {ns2} dummy2 type dummy", ns=str(ns1))
> > +
> > +    ip("link del dummy1", ns=str(ns2))
> > +    ip("link del dummy2", ns=str(ns2))
> > +
> > +    time.sleep(1)
> > +    rtnl.check_ntf()
> > +    ksft_true(rtnl.async_msg_queue.empty(),
> > +              "Received unexpected link notification")
>
> I think we need a much larger coverage here, possibly testing all the
> update drivers and more 'netns', 'link-netnsid', 'peer netns'
> permutations for the devices that allow them.

OK, I will add more cases. But I'm afraid I don't know how to build
valid parameters for all of them, and some seem to require hardware.

>
> Thanks,
>
> Paolo
>

Patchew 2.1-devel-b67e4c2

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