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Merge branch 'bonding-fix-ns-targets-not-work-on-hardware-nic'

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Hangbin Liu says:

====================
bonding: fix ns targets not work on hardware NIC

The first patch fixed ns targets not work on hardware NIC when bonding
set arp_validate.

The second patch add a related selftest for bonding.

v4: Thanks Nikolay for the comments:
    use bond_slave_ns_maddrs_{add/del} with clear name
    fix comments typos
    remove _slave_set_ns_maddrs underscore directly
    update bond_option_arp_validate_set() change logic
v3: use ndisc_mc_map to convert the mcast mac address (Jay Vosburgh)
v2: only add/del mcast group on backup slaves when arp_validate is set (Jay Vosburgh)
    arp_validate doesn't support 3ad, tlb, alb. So let's only do it on ab mode.
====================

Link: https://patch.msgid.link/20241111101650.27685-1-liuhangbin@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Paolo Abeni 2024-11-14 11:16:30 +01:00
commit f8d670b1ae
4 changed files with 151 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/net/bonding/bond_main.c
View File

@ -1008,6 +1008,8 @@ static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active,
if (bond->dev->flags & IFF_UP)
bond_hw_addr_flush(bond->dev, old_active->dev);
bond_slave_ns_maddrs_add(bond, old_active);
}
if (new_active) {
@ -1024,6 +1026,8 @@ static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active,
dev_mc_sync(new_active->dev, bond->dev);
netif_addr_unlock_bh(bond->dev);
}
bond_slave_ns_maddrs_del(bond, new_active);
}
}
@ -2341,6 +2345,11 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
bond_compute_features(bond);
bond_set_carrier(bond);
/* Needs to be called before bond_select_active_slave(), which will
* remove the maddrs if the slave is selected as active slave.
*/
bond_slave_ns_maddrs_add(bond, new_slave);
if (bond_uses_primary(bond)) {
block_netpoll_tx();
bond_select_active_slave(bond);
@ -2350,7 +2359,6 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
if (bond_mode_can_use_xmit_hash(bond))
bond_update_slave_arr(bond, NULL);
if (!slave_dev->netdev_ops->ndo_bpf ||
!slave_dev->netdev_ops->ndo_xdp_xmit) {
if (bond->xdp_prog) {
@ -2548,6 +2556,12 @@ static int __bond_release_one(struct net_device *bond_dev,
if (oldcurrent == slave)
bond_change_active_slave(bond, NULL);
/* Must be called after bond_change_active_slave () as the slave
* might change from an active slave to a backup slave. Then it is
* necessary to clear the maddrs on the backup slave.
*/
bond_slave_ns_maddrs_del(bond, slave);
if (bond_is_lb(bond)) {
/* Must be called only after the slave has been
* detached from the list and the curr_active_slave

82
drivers/net/bonding/bond_options.c
View File

@ -15,6 +15,7 @@
#include <linux/sched/signal.h>
#include <net/bonding.h>
#include <net/ndisc.h>
static int bond_option_active_slave_set(struct bonding *bond,
const struct bond_opt_value *newval);
@ -1234,6 +1235,68 @@ static int bond_option_arp_ip_targets_set(struct bonding *bond,
}
#if IS_ENABLED(CONFIG_IPV6)
static bool slave_can_set_ns_maddr(const struct bonding *bond, struct slave *slave)
{
return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
!bond_is_active_slave(slave) &&
slave->dev->flags & IFF_MULTICAST;
}
static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add)
{
struct in6_addr *targets = bond->params.ns_targets;
char slot_maddr[MAX_ADDR_LEN];
int i;
if (!slave_can_set_ns_maddr(bond, slave))
return;
for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
if (ipv6_addr_any(&targets[i]))
break;
if (!ndisc_mc_map(&targets[i], slot_maddr, slave->dev, 0)) {
if (add)
dev_mc_add(slave->dev, slot_maddr);
else
dev_mc_del(slave->dev, slot_maddr);
}
}
}
void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave)
{
if (!bond->params.arp_validate)
return;
slave_set_ns_maddrs(bond, slave, true);
}
void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave)
{
if (!bond->params.arp_validate)
return;
slave_set_ns_maddrs(bond, slave, false);
}
static void slave_set_ns_maddr(struct bonding *bond, struct slave *slave,
struct in6_addr *target, struct in6_addr *slot)
{
char target_maddr[MAX_ADDR_LEN], slot_maddr[MAX_ADDR_LEN];
if (!bond->params.arp_validate || !slave_can_set_ns_maddr(bond, slave))
return;
/* remove the previous maddr from slave */
if (!ipv6_addr_any(slot) &&
!ndisc_mc_map(slot, slot_maddr, slave->dev, 0))
dev_mc_del(slave->dev, slot_maddr);
/* add new maddr on slave if target is set */
if (!ipv6_addr_any(target) &&
!ndisc_mc_map(target, target_maddr, slave->dev, 0))
dev_mc_add(slave->dev, target_maddr);
}
static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
struct in6_addr *target,
unsigned long last_rx)
@ -1243,8 +1306,10 @@ static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
struct slave *slave;
if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
bond_for_each_slave(bond, slave, iter)
bond_for_each_slave(bond, slave, iter) {
slave->target_last_arp_rx[slot] = last_rx;
slave_set_ns_maddr(bond, slave, target, &targets[slot]);
}
targets[slot] = *target;
}
}
@ -1296,15 +1361,30 @@ static int bond_option_ns_ip6_targets_set(struct bonding *bond,
{
return -EPERM;
}
static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) {}
void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) {}
void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) {}
#endif
static int bond_option_arp_validate_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
bool changed = !!bond->params.arp_validate != !!newval->value;
struct list_head *iter;
struct slave *slave;
netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
newval->string, newval->value);
bond->params.arp_validate = newval->value;
if (changed) {
bond_for_each_slave(bond, slave, iter)
slave_set_ns_maddrs(bond, slave, !!bond->params.arp_validate);
}
return 0;
}

2
include/net/bond_options.h
View File

@ -161,5 +161,7 @@ void bond_option_arp_ip_targets_clear(struct bonding *bond);
#if IS_ENABLED(CONFIG_IPV6)
void bond_option_ns_ip6_targets_clear(struct bonding *bond);
#endif
void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave);
void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave);
#endif /* _NET_BOND_OPTIONS_H */

54
tools/testing/selftests/drivers/net/bonding/bond_options.sh
View File

@ -11,6 +11,8 @@ ALL_TESTS="
lib_dir=$(dirname "$0")
source ${lib_dir}/bond_topo_3d1c.sh
c_maddr="33:33:00:00:00:10"
g_maddr="33:33:00:00:02:54"
skip_prio()
{
@ -240,6 +242,54 @@ arp_validate_test()
done
}
# Testing correct multicast groups are added to slaves for ns targets
arp_validate_mcast()
{
RET=0
local arp_valid=$(cmd_jq "ip -n ${s_ns} -j -d link show bond0" ".[].linkinfo.info_data.arp_validate")
local active_slave=$(cmd_jq "ip -n ${s_ns} -d -j link show bond0" ".[].linkinfo.info_data.active_slave")
for i in $(seq 0 2); do
maddr_list=$(ip -n ${s_ns} maddr show dev eth${i})
# arp_valid == 0 or active_slave should not join any maddrs
if { [ "$arp_valid" == "null" ] || [ "eth${i}" == ${active_slave} ]; } && \
echo "$maddr_list" | grep -qE "${c_maddr}|${g_maddr}"; then
RET=1
check_err 1 "arp_valid $arp_valid active_slave $active_slave, eth$i has mcast group"
# arp_valid != 0 and backup_slave should join both maddrs
elif [ "$arp_valid" != "null" ] && [ "eth${i}" != ${active_slave} ] && \
( ! echo "$maddr_list" | grep -q "${c_maddr}" || \
! echo "$maddr_list" | grep -q "${m_maddr}"); then
RET=1
check_err 1 "arp_valid $arp_valid active_slave $active_slave, eth$i has mcast group"
fi
done
# Do failover
ip -n ${s_ns} link set ${active_slave} down
# wait for active link change
slowwait 2 active_slave_changed $active_slave
active_slave=$(cmd_jq "ip -n ${s_ns} -d -j link show bond0" ".[].linkinfo.info_data.active_slave")
for i in $(seq 0 2); do
maddr_list=$(ip -n ${s_ns} maddr show dev eth${i})
# arp_valid == 0 or active_slave should not join any maddrs
if { [ "$arp_valid" == "null" ] || [ "eth${i}" == ${active_slave} ]; } && \
echo "$maddr_list" | grep -qE "${c_maddr}|${g_maddr}"; then
RET=1
check_err 1 "arp_valid $arp_valid active_slave $active_slave, eth$i has mcast group"
# arp_valid != 0 and backup_slave should join both maddrs
elif [ "$arp_valid" != "null" ] && [ "eth${i}" != ${active_slave} ] && \
( ! echo "$maddr_list" | grep -q "${c_maddr}" || \
! echo "$maddr_list" | grep -q "${m_maddr}"); then
RET=1
check_err 1 "arp_valid $arp_valid active_slave $active_slave, eth$i has mcast group"
fi
done
}
arp_validate_arp()
{
local mode=$1
@ -261,8 +311,10 @@ arp_validate_ns()
fi
for val in $(seq 0 6); do
arp_validate_test "mode $mode arp_interval 100 ns_ip6_target ${g_ip6} arp_validate $val"
arp_validate_test "mode $mode arp_interval 100 ns_ip6_target ${g_ip6},${c_ip6} arp_validate $val"
log_test "arp_validate" "$mode ns_ip6_target arp_validate $val"
arp_validate_mcast
log_test "arp_validate" "join mcast group"
done
}