* [PATCH net v4 1/3] selftests: include bonding tests into the kselftest infra
2022-08-18 14:41 [PATCH net v4 0/3] bonding: 802.3ad: fix no transmission of LACPDUs Jonathan Toppins
@ 2022-08-18 14:41 ` Jonathan Toppins
2022-08-18 14:41 ` [PATCH net v4 2/3] bonding: 802.3ad: fix no transmission of LACPDUs Jonathan Toppins
` (2 subsequent siblings)
3 siblings, 0 replies; 6+ messages in thread
From: Jonathan Toppins @ 2022-08-18 14:41 UTC (permalink / raw)
To: netdev, jay.vosburgh
Cc: liuhangbin, Shuah Khan, linux-kernel, linux-kselftest
This creates a test collection in drivers/net/bonding for bonding
specific kernel selftests.
The first test is a reproducer that provisions a bond and given the
specific order in how the ip-link(8) commands are issued the bond never
transmits an LACPDU frame on any of its slaves.
Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
---
Notes:
v2:
* fully integrated the test into the kselftests infrastructure
* moved the reproducer to under
tools/testing/selftests/drivers/net/bonding
* reduced the test to its minimial amount and used ip-link(8) for
all bond interface configuration
v3:
* rebase to latest net/master
* remove `#set -x` requested by Hangbin
v4:
* no changes
MAINTAINERS | 1 +
tools/testing/selftests/Makefile | 1 +
.../selftests/drivers/net/bonding/Makefile | 6 ++
.../net/bonding/bond-break-lacpdu-tx.sh | 81 +++++++++++++++++++
.../selftests/drivers/net/bonding/config | 1 +
.../selftests/drivers/net/bonding/settings | 1 +
6 files changed, 91 insertions(+)
create mode 100644 tools/testing/selftests/drivers/net/bonding/Makefile
create mode 100755 tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh
create mode 100644 tools/testing/selftests/drivers/net/bonding/config
create mode 100644 tools/testing/selftests/drivers/net/bonding/settings
diff --git a/MAINTAINERS b/MAINTAINERS
index f2d64020399b..e5fb14dc302d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3672,6 +3672,7 @@ F: Documentation/networking/bonding.rst
F: drivers/net/bonding/
F: include/net/bond*
F: include/uapi/linux/if_bonding.h
+F: tools/testing/selftests/net/bonding/
BOSCH SENSORTEC BMA400 ACCELEROMETER IIO DRIVER
M: Dan Robertson <dan@dlrobertson.com>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 10b34bb03bc1..c2064a35688b 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -12,6 +12,7 @@ TARGETS += cpu-hotplug
TARGETS += damon
TARGETS += drivers/dma-buf
TARGETS += drivers/s390x/uvdevice
+TARGETS += drivers/net/bonding
TARGETS += efivarfs
TARGETS += exec
TARGETS += filesystems
diff --git a/tools/testing/selftests/drivers/net/bonding/Makefile b/tools/testing/selftests/drivers/net/bonding/Makefile
new file mode 100644
index 000000000000..ab6c54b12098
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/bonding/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for net selftests
+
+TEST_PROGS := bond-break-lacpdu-tx.sh
+
+include ../../../lib.mk
diff --git a/tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh b/tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh
new file mode 100755
index 000000000000..47ab90596acb
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh
@@ -0,0 +1,81 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+# Regression Test:
+# Verify LACPDUs get transmitted after setting the MAC address of
+# the bond.
+#
+# https://bugzilla.redhat.com/show_bug.cgi?id=2020773
+#
+# +---------+
+# | fab-br0 |
+# +---------+
+# |
+# +---------+
+# | fbond |
+# +---------+
+# | |
+# +------+ +------+
+# |veth1 | |veth2 |
+# +------+ +------+
+#
+# We use veths instead of physical interfaces
+
+set -e
+tmp=$(mktemp -q dump.XXXXXX)
+cleanup() {
+ ip link del fab-br0 >/dev/null 2>&1 || :
+ ip link del fbond >/dev/null 2>&1 || :
+ ip link del veth1-bond >/dev/null 2>&1 || :
+ ip link del veth2-bond >/dev/null 2>&1 || :
+ modprobe -r bonding >/dev/null 2>&1 || :
+ rm -f -- ${tmp}
+}
+
+trap cleanup 0 1 2
+cleanup
+sleep 1
+
+# create the bridge
+ip link add fab-br0 address 52:54:00:3B:7C:A6 mtu 1500 type bridge \
+ forward_delay 15
+
+# create the bond
+ip link add fbond type bond mode 4 miimon 200 xmit_hash_policy 1 \
+ ad_actor_sys_prio 65535 lacp_rate fast
+
+# set bond address
+ip link set fbond address 52:54:00:3B:7C:A6
+ip link set fbond up
+
+# set again bond sysfs parameters
+ip link set fbond type bond ad_actor_sys_prio 65535
+
+# create veths
+ip link add name veth1-bond type veth peer name veth1-end
+ip link add name veth2-bond type veth peer name veth2-end
+
+# add ports
+ip link set fbond master fab-br0
+ip link set veth1-bond down master fbond
+ip link set veth2-bond down master fbond
+
+# bring up
+ip link set veth1-end up
+ip link set veth2-end up
+ip link set fab-br0 up
+ip link set fbond up
+ip addr add dev fab-br0 10.0.0.3
+
+tcpdump -n -i veth1-end -e ether proto 0x8809 >${tmp} 2>&1 &
+sleep 15
+pkill tcpdump >/dev/null 2>&1
+rc=0
+num=$(grep "packets captured" ${tmp} | awk '{print $1}')
+if test "$num" -gt 0; then
+ echo "PASS, captured ${num}"
+else
+ echo "FAIL"
+ rc=1
+fi
+exit $rc
diff --git a/tools/testing/selftests/drivers/net/bonding/config b/tools/testing/selftests/drivers/net/bonding/config
new file mode 100644
index 000000000000..dc1c22de3c92
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/bonding/config
@@ -0,0 +1 @@
+CONFIG_BONDING=y
diff --git a/tools/testing/selftests/drivers/net/bonding/settings b/tools/testing/selftests/drivers/net/bonding/settings
new file mode 100644
index 000000000000..867e118223cd
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/bonding/settings
@@ -0,0 +1 @@
+timeout=60
--
2.31.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH net v4 2/3] bonding: 802.3ad: fix no transmission of LACPDUs
2022-08-18 14:41 [PATCH net v4 0/3] bonding: 802.3ad: fix no transmission of LACPDUs Jonathan Toppins
2022-08-18 14:41 ` [PATCH net v4 1/3] selftests: include bonding tests into the kselftest infra Jonathan Toppins
@ 2022-08-18 14:41 ` Jonathan Toppins
2022-08-18 14:41 ` [PATCH net v4 3/3] bonding: 3ad: make ad_ticks_per_sec a const Jonathan Toppins
2022-08-19 0:02 ` [PATCH net v4 0/3] bonding: 802.3ad: fix no transmission of LACPDUs Jay Vosburgh
3 siblings, 0 replies; 6+ messages in thread
From: Jonathan Toppins @ 2022-08-18 14:41 UTC (permalink / raw)
To: netdev, jay.vosburgh
Cc: liuhangbin, Jay Vosburgh, Veaceslav Falico, Andy Gospodarek,
David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni,
Nikolay Aleksandrov, linux-kernel
This is caused by the global variable ad_ticks_per_sec being zero as
demonstrated by the reproducer script discussed below. This causes
all timer values in __ad_timer_to_ticks to be zero, resulting
in the periodic timer to never fire.
To reproduce:
Run the script in
`tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh` which
puts bonding into a state where it never transmits LACPDUs.
line 44: ip link add fbond type bond mode 4 miimon 200 \
xmit_hash_policy 1 ad_actor_sys_prio 65535 lacp_rate fast
setting bond param: ad_actor_sys_prio
given:
params.ad_actor_system = 0
call stack:
bond_option_ad_actor_sys_prio()
-> bond_3ad_update_ad_actor_settings()
-> set ad.system.sys_priority = bond->params.ad_actor_sys_prio
-> ad.system.sys_mac_addr = bond->dev->dev_addr; because
params.ad_actor_system == 0
results:
ad.system.sys_mac_addr = bond->dev->dev_addr
line 48: ip link set fbond address 52:54:00:3B:7C:A6
setting bond MAC addr
call stack:
bond->dev->dev_addr = new_mac
line 52: ip link set fbond type bond ad_actor_sys_prio 65535
setting bond param: ad_actor_sys_prio
given:
params.ad_actor_system = 0
call stack:
bond_option_ad_actor_sys_prio()
-> bond_3ad_update_ad_actor_settings()
-> set ad.system.sys_priority = bond->params.ad_actor_sys_prio
-> ad.system.sys_mac_addr = bond->dev->dev_addr; because
params.ad_actor_system == 0
results:
ad.system.sys_mac_addr = bond->dev->dev_addr
line 60: ip link set veth1-bond down master fbond
given:
params.ad_actor_system = 0
params.mode = BOND_MODE_8023AD
ad.system.sys_mac_addr == bond->dev->dev_addr
call stack:
bond_enslave
-> bond_3ad_initialize(); because first slave
-> if ad.system.sys_mac_addr != bond->dev->dev_addr
return
results:
Nothing is run in bond_3ad_initialize() because dev_addr equals
sys_mac_addr leaving the global ad_ticks_per_sec zero as it is
never initialized anywhere else.
The if check around the contents of bond_3ad_initialize() is no longer
needed due to commit 5ee14e6d336f ("bonding: 3ad: apply ad_actor settings
changes immediately") which sets ad.system.sys_mac_addr if any one of
the bonding parameters whos set function calls
bond_3ad_update_ad_actor_settings(). This is because if
ad.system.sys_mac_addr is zero it will be set to the current bond mac
address, this causes the if check to never be true.
Fixes: 5ee14e6d336f ("bonding: 3ad: apply ad_actor settings changes immediately")
Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
---
Notes:
v2:
* split this fix from the reproducer
v3:
* rebased to latest net/master
v4:
* instead of setting ad_ticks_per_sec remove the if statement around the
body of the function of bond_3ad_initialize().
drivers/net/bonding/bond_3ad.c | 38 ++++++++++++++--------------------
1 file changed, 16 insertions(+), 22 deletions(-)
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index d7fb33c078e8..1f0120cbe9e8 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -2007,30 +2007,24 @@ void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
*/
void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
{
- /* check that the bond is not initialized yet */
- if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
- bond->dev->dev_addr)) {
-
- BOND_AD_INFO(bond).aggregator_identifier = 0;
-
- BOND_AD_INFO(bond).system.sys_priority =
- bond->params.ad_actor_sys_prio;
- if (is_zero_ether_addr(bond->params.ad_actor_system))
- BOND_AD_INFO(bond).system.sys_mac_addr =
- *((struct mac_addr *)bond->dev->dev_addr);
- else
- BOND_AD_INFO(bond).system.sys_mac_addr =
- *((struct mac_addr *)bond->params.ad_actor_system);
+ BOND_AD_INFO(bond).aggregator_identifier = 0;
+ BOND_AD_INFO(bond).system.sys_priority =
+ bond->params.ad_actor_sys_prio;
+ if (is_zero_ether_addr(bond->params.ad_actor_system))
+ BOND_AD_INFO(bond).system.sys_mac_addr =
+ *((struct mac_addr *)bond->dev->dev_addr);
+ else
+ BOND_AD_INFO(bond).system.sys_mac_addr =
+ *((struct mac_addr *)bond->params.ad_actor_system);
- /* initialize how many times this module is called in one
- * second (should be about every 100ms)
- */
- ad_ticks_per_sec = tick_resolution;
+ /* initialize how many times this module is called in one
+ * second (should be about every 100ms)
+ */
+ ad_ticks_per_sec = tick_resolution;
- bond_3ad_initiate_agg_selection(bond,
- AD_AGGREGATOR_SELECTION_TIMER *
- ad_ticks_per_sec);
- }
+ bond_3ad_initiate_agg_selection(bond,
+ AD_AGGREGATOR_SELECTION_TIMER *
+ ad_ticks_per_sec);
}
/**
--
2.31.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH net v4 3/3] bonding: 3ad: make ad_ticks_per_sec a const
2022-08-18 14:41 [PATCH net v4 0/3] bonding: 802.3ad: fix no transmission of LACPDUs Jonathan Toppins
2022-08-18 14:41 ` [PATCH net v4 1/3] selftests: include bonding tests into the kselftest infra Jonathan Toppins
2022-08-18 14:41 ` [PATCH net v4 2/3] bonding: 802.3ad: fix no transmission of LACPDUs Jonathan Toppins
@ 2022-08-18 14:41 ` Jonathan Toppins
2022-08-19 3:57 ` Jakub Kicinski
2022-08-19 0:02 ` [PATCH net v4 0/3] bonding: 802.3ad: fix no transmission of LACPDUs Jay Vosburgh
3 siblings, 1 reply; 6+ messages in thread
From: Jonathan Toppins @ 2022-08-18 14:41 UTC (permalink / raw)
To: netdev, jay.vosburgh
Cc: liuhangbin, Jay Vosburgh, Veaceslav Falico, Andy Gospodarek,
David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni,
linux-kernel
The value is only ever set once in bond_3ad_initialize and only ever
read otherwise. There seems to be no reason to set the variable via
bond_3ad_initialize when setting the global variable will do. Change
ad_ticks_per_sec to a const to enforce its read-only usage.
Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
---
Notes:
v4:
* remove passing the value of ad_ticks_per_sec on the stack and
set ad_ticks_per_sec and make as const
drivers/net/bonding/bond_3ad.c | 10 +++-------
drivers/net/bonding/bond_main.c | 2 +-
include/net/bond_3ad.h | 2 +-
3 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 1f0120cbe9e8..2946290ca517 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -84,7 +84,8 @@ enum ad_link_speed_type {
static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
0, 0, 0, 0, 0, 0
};
-static u16 ad_ticks_per_sec;
+
+static const u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL;
static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
@@ -2005,7 +2006,7 @@ void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
*
* Can be called only after the mac address of the bond is set.
*/
-void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
+void bond_3ad_initialize(struct bonding *bond)
{
BOND_AD_INFO(bond).aggregator_identifier = 0;
BOND_AD_INFO(bond).system.sys_priority =
@@ -2017,11 +2018,6 @@ void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
BOND_AD_INFO(bond).system.sys_mac_addr =
*((struct mac_addr *)bond->params.ad_actor_system);
- /* initialize how many times this module is called in one
- * second (should be about every 100ms)
- */
- ad_ticks_per_sec = tick_resolution;
-
bond_3ad_initiate_agg_selection(bond,
AD_AGGREGATOR_SELECTION_TIMER *
ad_ticks_per_sec);
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 50e60843020c..2f4da2c13c0a 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2081,7 +2081,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
/* Initialize AD with the number of times that the AD timer is called in 1 second
* can be called only after the mac address of the bond is set
*/
- bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
+ bond_3ad_initialize(bond);
} else {
SLAVE_AD_INFO(new_slave)->id =
SLAVE_AD_INFO(prev_slave)->id + 1;
diff --git a/include/net/bond_3ad.h b/include/net/bond_3ad.h
index 184105d68294..be2992e6de5d 100644
--- a/include/net/bond_3ad.h
+++ b/include/net/bond_3ad.h
@@ -290,7 +290,7 @@ static inline const char *bond_3ad_churn_desc(churn_state_t state)
}
/* ========== AD Exported functions to the main bonding code ========== */
-void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution);
+void bond_3ad_initialize(struct bonding *bond);
void bond_3ad_bind_slave(struct slave *slave);
void bond_3ad_unbind_slave(struct slave *slave);
void bond_3ad_state_machine_handler(struct work_struct *);
--
2.31.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH net v4 3/3] bonding: 3ad: make ad_ticks_per_sec a const
2022-08-18 14:41 ` [PATCH net v4 3/3] bonding: 3ad: make ad_ticks_per_sec a const Jonathan Toppins
@ 2022-08-19 3:57 ` Jakub Kicinski
0 siblings, 0 replies; 6+ messages in thread
From: Jakub Kicinski @ 2022-08-19 3:57 UTC (permalink / raw)
To: Jonathan Toppins
Cc: netdev, jay.vosburgh, liuhangbin, Jay Vosburgh, Veaceslav Falico,
Andy Gospodarek, David S. Miller, Eric Dumazet, Paolo Abeni,
linux-kernel
On Thu, 18 Aug 2022 10:41:12 -0400 Jonathan Toppins wrote:
> @@ -2005,7 +2006,7 @@ void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
> *
> * Can be called only after the mac address of the bond is set.
> */
> -void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
> +void bond_3ad_initialize(struct bonding *bond)
kdoc needs updating here
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH net v4 0/3] bonding: 802.3ad: fix no transmission of LACPDUs
2022-08-18 14:41 [PATCH net v4 0/3] bonding: 802.3ad: fix no transmission of LACPDUs Jonathan Toppins
` (2 preceding siblings ...)
2022-08-18 14:41 ` [PATCH net v4 3/3] bonding: 3ad: make ad_ticks_per_sec a const Jonathan Toppins
@ 2022-08-19 0:02 ` Jay Vosburgh
3 siblings, 0 replies; 6+ messages in thread
From: Jay Vosburgh @ 2022-08-19 0:02 UTC (permalink / raw)
To: Jonathan Toppins; +Cc: netdev, liuhangbin
Jonathan Toppins <jtoppins@redhat.com> wrote:
>Configuring a bond in a specific order can leave the bond in a state
>where it never transmits LACPDUs.
>
>The first patch adds some kselftest infrastructure and the reproducer
>that demonstrates the problem. The second patch fixes the issue. The
>new third patch makes ad_ticks_per_sec a static const and removes the
>passing of this variable via the stack.
>
>v4:
> * rebased to latest net/master
> * removed if check around bond_3ad_initialize function contents
> * created a new patch that makes ad_ticks_per_sec a static const
>v3:
> * rebased to latest net/master
> * addressed comment from Hangbin
>
>Jonathan Toppins (3):
> selftests: include bonding tests into the kselftest infra
> bonding: 802.3ad: fix no transmission of LACPDUs
> bonding: 3ad: make ad_ticks_per_sec a const
For the series:
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
-J
---
-Jay Vosburgh, jay.vosburgh@canonical.com
^ permalink raw reply [flat|nested] 6+ messages in thread