selftests: forwarding: Add MDB dump test cases

The kernel maintains three markers for the MDB dump:

1. The last bridge device from which the MDB was dumped.
2. The last MDB entry from which the MDB was dumped.
3. The last port-group entry that was dumped.

Add test cases for large scale MDB dump to make sure that all the
configured entries are dumped and that the markers are used correctly.

Specifically, create 2 bridges with 32 ports and add 256 MDB entries in
which all the ports are member of. Test that each bridge reports 8192
(256 * 32) permanent entries. Do that with IPv4, IPv6 and L2 MDB
entries.

On my system, MDB dump of the above is contained in about 50 netlink
messages.

Example output:

 # ./bridge_mdb.sh
 [...]
 INFO: # Large scale dump tests
 TEST: IPv4 large scale dump tests                                   [ OK ]
 TEST: IPv6 large scale dump tests                                   [ OK ]
 TEST: L2 large scale dump tests                                     [ OK ]
 [...]

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ido Schimmel 2023-02-09 09:18:52 +02:00 коммит произвёл Jakub Kicinski
Родитель 170afa71e3
Коммит 049139126e
1 изменённых файлов: 99 добавлений и 0 удалений

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@ -742,10 +742,109 @@ cfg_test_port()
cfg_test_port_l2
}
ipv4_grps_get()
{
local max_grps=$1; shift
local i
for i in $(seq 0 $((max_grps - 1))); do
echo "239.1.1.$i"
done
}
ipv6_grps_get()
{
local max_grps=$1; shift
local i
for i in $(seq 0 $((max_grps - 1))); do
echo "ff0e::$(printf %x $i)"
done
}
l2_grps_get()
{
local max_grps=$1; shift
local i
for i in $(seq 0 $((max_grps - 1))); do
echo "01:00:00:00:00:$(printf %02x $i)"
done
}
cfg_test_dump_common()
{
local name=$1; shift
local fn=$1; shift
local max_bridges=2
local max_grps=256
local max_ports=32
local num_entries
local batch_file
local grp
local i j
RET=0
# Create net devices.
for i in $(seq 1 $max_bridges); do
ip link add name br-test${i} up type bridge vlan_filtering 1 \
mcast_snooping 1
for j in $(seq 1 $max_ports); do
ip link add name br-test${i}-du${j} up \
master br-test${i} type dummy
done
done
# Create batch file with MDB entries.
batch_file=$(mktemp)
for i in $(seq 1 $max_bridges); do
for j in $(seq 1 $max_ports); do
for grp in $($fn $max_grps); do
echo "mdb add dev br-test${i} \
port br-test${i}-du${j} grp $grp \
permanent vid 1" >> $batch_file
done
done
done
# Program the batch file and check for expected number of entries.
bridge -b $batch_file
for i in $(seq 1 $max_bridges); do
num_entries=$(bridge mdb show dev br-test${i} | \
grep "permanent" | wc -l)
[[ $num_entries -eq $((max_grps * max_ports)) ]]
check_err $? "Wrong number of entries in br-test${i}"
done
# Cleanup.
rm $batch_file
for i in $(seq 1 $max_bridges); do
ip link del dev br-test${i}
for j in $(seq $max_ports); do
ip link del dev br-test${i}-du${j}
done
done
log_test "$name large scale dump tests"
}
# Check large scale dump.
cfg_test_dump()
{
echo
log_info "# Large scale dump tests"
cfg_test_dump_common "IPv4" ipv4_grps_get
cfg_test_dump_common "IPv6" ipv6_grps_get
cfg_test_dump_common "L2" l2_grps_get
}
cfg_test()
{
cfg_test_host
cfg_test_port
cfg_test_dump
}
__fwd_test_host_ip()