* [PATCH net-next 0/6] mlxsw: Two sampling fixes
@ 2021-03-29 10:09 Ido Schimmel
2021-03-29 10:09 ` [PATCH net-next 1/6] mlxsw: spectrum_matchall: Perform protocol check earlier Ido Schimmel
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: Ido Schimmel @ 2021-03-29 10:09 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, jiri, mlxsw, Ido Schimmel
From: Ido Schimmel <idosch@nvidia.com>
This patchset fixes two bugs in recent sampling submissions.
The first fix, in patch #3, prevents matchall rules with sample action
to be added in front of flower rules on egress. Patches #1-#2 are
preparations meant at avoiding similar bugs in the future. Patch #4 is a
selftest.
The second fix, in patch #5, prevents sampling from being enabled on a
port if already enabled. Patch #6 is a selftest.
Ido Schimmel (6):
mlxsw: spectrum_matchall: Perform protocol check earlier
mlxsw: spectrum_matchall: Convert if statements to a switch statement
mlxsw: spectrum_matchall: Perform priority checks earlier
selftests: mlxsw: Test matchall failure with protocol match
mlxsw: spectrum: Veto sampling if already enabled on port
selftests: mlxsw: Test vetoing of double sampling
.../net/ethernet/mellanox/mlxsw/spectrum.c | 5 ++
.../mellanox/mlxsw/spectrum_matchall.c | 46 ++++++++++---------
.../drivers/net/mlxsw/tc_restrictions.sh | 17 +++++++
.../selftests/drivers/net/mlxsw/tc_sample.sh | 30 ++++++++++++
4 files changed, 76 insertions(+), 22 deletions(-)
--
2.30.2
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH net-next 1/6] mlxsw: spectrum_matchall: Perform protocol check earlier
2021-03-29 10:09 [PATCH net-next 0/6] mlxsw: Two sampling fixes Ido Schimmel
@ 2021-03-29 10:09 ` Ido Schimmel
2021-03-29 10:09 ` [PATCH net-next 2/6] mlxsw: spectrum_matchall: Convert if statements to a switch statement Ido Schimmel
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Ido Schimmel @ 2021-03-29 10:09 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, jiri, mlxsw, Ido Schimmel
From: Ido Schimmel <idosch@nvidia.com>
Perform the protocol check earlier in the function instead of repeating
it for every action. Example:
# tc filter add dev swp1 ingress proto ip matchall skip_sw action sample group 1 rate 100
Error: matchall rules only supported with 'all' protocol.
We have an error talking to the kernel
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
---
.../net/ethernet/mellanox/mlxsw/spectrum_matchall.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
index ce58a795c6fc..9252e23fd082 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
@@ -238,6 +238,11 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
flower_prio_valid = true;
}
+ if (protocol != htons(ETH_P_ALL)) {
+ NL_SET_ERR_MSG(f->common.extack, "matchall rules only supported with 'all' protocol");
+ return -EOPNOTSUPP;
+ }
+
mall_entry = kzalloc(sizeof(*mall_entry), GFP_KERNEL);
if (!mall_entry)
return -ENOMEM;
@@ -247,7 +252,7 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
act = &f->rule->action.entries[0];
- if (act->id == FLOW_ACTION_MIRRED && protocol == htons(ETH_P_ALL)) {
+ if (act->id == FLOW_ACTION_MIRRED) {
if (flower_prio_valid && mall_entry->ingress &&
mall_entry->priority >= flower_min_prio) {
NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
@@ -262,8 +267,7 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
}
mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_MIRROR;
mall_entry->mirror.to_dev = act->dev;
- } else if (act->id == FLOW_ACTION_SAMPLE &&
- protocol == htons(ETH_P_ALL)) {
+ } else if (act->id == FLOW_ACTION_SAMPLE) {
if (flower_prio_valid &&
mall_entry->priority >= flower_min_prio) {
NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
--
2.30.2
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH net-next 2/6] mlxsw: spectrum_matchall: Convert if statements to a switch statement
2021-03-29 10:09 [PATCH net-next 0/6] mlxsw: Two sampling fixes Ido Schimmel
2021-03-29 10:09 ` [PATCH net-next 1/6] mlxsw: spectrum_matchall: Perform protocol check earlier Ido Schimmel
@ 2021-03-29 10:09 ` Ido Schimmel
2021-03-29 10:09 ` [PATCH net-next 3/6] mlxsw: spectrum_matchall: Perform priority checks earlier Ido Schimmel
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Ido Schimmel @ 2021-03-29 10:09 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, jiri, mlxsw, Ido Schimmel
From: Ido Schimmel <idosch@nvidia.com>
Previous patch moved the protocol check out of the action check, so
these if statements can now be converted to a switch statement. Perform
the conversion.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
---
drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
index 9252e23fd082..af0a20581a37 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
@@ -252,7 +252,8 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
act = &f->rule->action.entries[0];
- if (act->id == FLOW_ACTION_MIRRED) {
+ switch (act->id) {
+ case FLOW_ACTION_MIRRED:
if (flower_prio_valid && mall_entry->ingress &&
mall_entry->priority >= flower_min_prio) {
NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
@@ -267,7 +268,8 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
}
mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_MIRROR;
mall_entry->mirror.to_dev = act->dev;
- } else if (act->id == FLOW_ACTION_SAMPLE) {
+ break;
+ case FLOW_ACTION_SAMPLE:
if (flower_prio_valid &&
mall_entry->priority >= flower_min_prio) {
NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
@@ -279,7 +281,8 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
mall_entry->sample.params.truncate = act->sample.truncate;
mall_entry->sample.params.trunc_size = act->sample.trunc_size;
mall_entry->sample.params.rate = act->sample.rate;
- } else {
+ break;
+ default:
err = -EOPNOTSUPP;
goto errout;
}
--
2.30.2
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH net-next 3/6] mlxsw: spectrum_matchall: Perform priority checks earlier
2021-03-29 10:09 [PATCH net-next 0/6] mlxsw: Two sampling fixes Ido Schimmel
2021-03-29 10:09 ` [PATCH net-next 1/6] mlxsw: spectrum_matchall: Perform protocol check earlier Ido Schimmel
2021-03-29 10:09 ` [PATCH net-next 2/6] mlxsw: spectrum_matchall: Convert if statements to a switch statement Ido Schimmel
@ 2021-03-29 10:09 ` Ido Schimmel
2021-03-29 10:09 ` [PATCH net-next 4/6] selftests: mlxsw: Test matchall failure with protocol match Ido Schimmel
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Ido Schimmel @ 2021-03-29 10:09 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, jiri, mlxsw, Ido Schimmel
From: Ido Schimmel <idosch@nvidia.com>
Perform the priority check earlier in the function instead of repeating
it for every action. This fixes a bug that allowed matchall rules with
sample action to be added in front of flower rules on egress.
Fixes: 54d0e963f683 ("mlxsw: spectrum_matchall: Add support for egress sampling")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
---
.../mellanox/mlxsw/spectrum_matchall.c | 31 ++++++++-----------
1 file changed, 13 insertions(+), 18 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
index af0a20581a37..07b371cd9818 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
@@ -250,32 +250,27 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
mall_entry->priority = f->common.prio;
mall_entry->ingress = mlxsw_sp_flow_block_is_ingress_bound(block);
+ if (flower_prio_valid && mall_entry->ingress &&
+ mall_entry->priority >= flower_min_prio) {
+ NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
+ err = -EOPNOTSUPP;
+ goto errout;
+ }
+ if (flower_prio_valid && !mall_entry->ingress &&
+ mall_entry->priority <= flower_max_prio) {
+ NL_SET_ERR_MSG(f->common.extack, "Failed to add in front of existing flower rules");
+ err = -EOPNOTSUPP;
+ goto errout;
+ }
+
act = &f->rule->action.entries[0];
switch (act->id) {
case FLOW_ACTION_MIRRED:
- if (flower_prio_valid && mall_entry->ingress &&
- mall_entry->priority >= flower_min_prio) {
- NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
- err = -EOPNOTSUPP;
- goto errout;
- }
- if (flower_prio_valid && !mall_entry->ingress &&
- mall_entry->priority <= flower_max_prio) {
- NL_SET_ERR_MSG(f->common.extack, "Failed to add in front of existing flower rules");
- err = -EOPNOTSUPP;
- goto errout;
- }
mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_MIRROR;
mall_entry->mirror.to_dev = act->dev;
break;
case FLOW_ACTION_SAMPLE:
- if (flower_prio_valid &&
- mall_entry->priority >= flower_min_prio) {
- NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing flower rules");
- err = -EOPNOTSUPP;
- goto errout;
- }
mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_SAMPLE;
mall_entry->sample.params.psample_group = act->sample.psample_group;
mall_entry->sample.params.truncate = act->sample.truncate;
--
2.30.2
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH net-next 4/6] selftests: mlxsw: Test matchall failure with protocol match
2021-03-29 10:09 [PATCH net-next 0/6] mlxsw: Two sampling fixes Ido Schimmel
` (2 preceding siblings ...)
2021-03-29 10:09 ` [PATCH net-next 3/6] mlxsw: spectrum_matchall: Perform priority checks earlier Ido Schimmel
@ 2021-03-29 10:09 ` Ido Schimmel
2021-03-29 10:09 ` [PATCH net-next 5/6] mlxsw: spectrum: Veto sampling if already enabled on port Ido Schimmel
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Ido Schimmel @ 2021-03-29 10:09 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, jiri, mlxsw, Ido Schimmel
From: Ido Schimmel <idosch@nvidia.com>
The driver can only offload matchall rules that do not match on a
protocol. Test that matchall rules that match on a protocol are vetoed.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
---
.../drivers/net/mlxsw/tc_restrictions.sh | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/tools/testing/selftests/drivers/net/mlxsw/tc_restrictions.sh b/tools/testing/selftests/drivers/net/mlxsw/tc_restrictions.sh
index b4dbda706c4d..5ec3beb637c8 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/tc_restrictions.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/tc_restrictions.sh
@@ -11,6 +11,7 @@ ALL_TESTS="
matchall_mirror_behind_flower_ingress_test
matchall_sample_behind_flower_ingress_test
matchall_mirror_behind_flower_egress_test
+ matchall_proto_match_test
police_limits_test
multi_police_test
"
@@ -291,6 +292,22 @@ matchall_mirror_behind_flower_egress_test()
matchall_behind_flower_egress_test "mirror" "mirred egress mirror dev $swp2"
}
+matchall_proto_match_test()
+{
+ RET=0
+
+ tc qdisc add dev $swp1 clsact
+
+ tc filter add dev $swp1 ingress pref 1 proto ip handle 101 \
+ matchall skip_sw \
+ action sample group 1 rate 100
+ check_fail $? "Incorrect success to add matchall rule with protocol match"
+
+ tc qdisc del dev $swp1 clsact
+
+ log_test "matchall protocol match"
+}
+
police_limits_test()
{
RET=0
--
2.30.2
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH net-next 5/6] mlxsw: spectrum: Veto sampling if already enabled on port
2021-03-29 10:09 [PATCH net-next 0/6] mlxsw: Two sampling fixes Ido Schimmel
` (3 preceding siblings ...)
2021-03-29 10:09 ` [PATCH net-next 4/6] selftests: mlxsw: Test matchall failure with protocol match Ido Schimmel
@ 2021-03-29 10:09 ` Ido Schimmel
2021-03-29 10:09 ` [PATCH net-next 6/6] selftests: mlxsw: Test vetoing of double sampling Ido Schimmel
2021-03-29 20:50 ` [PATCH net-next 0/6] mlxsw: Two sampling fixes patchwork-bot+netdevbpf
6 siblings, 0 replies; 8+ messages in thread
From: Ido Schimmel @ 2021-03-29 10:09 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, jiri, mlxsw, Ido Schimmel
From: Ido Schimmel <idosch@nvidia.com>
The per-port sampling triggers (i.e., ingress / egress) cannot be
enabled twice. Meaning, the below configuration will not result in
packets being sampled twice:
# tc filter add dev swp1 ingress matchall skip_sw action sample rate 100 group 1
# tc filter add dev swp1 ingress matchall skip_sw action sample rate 100 group 1
Therefore, reject such configurations.
Fixes: 90f53c53ec4a ("mlxsw: spectrum: Start using sampling triggers hash table")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
---
drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index efc7acb4842c..bca0354482cb 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -2668,6 +2668,11 @@ mlxsw_sp_sample_trigger_params_set(struct mlxsw_sp *mlxsw_sp,
return mlxsw_sp_sample_trigger_node_init(mlxsw_sp, &key,
params);
+ if (trigger_node->trigger.local_port) {
+ NL_SET_ERR_MSG_MOD(extack, "Sampling already enabled on port");
+ return -EINVAL;
+ }
+
if (trigger_node->params.psample_group != params->psample_group ||
trigger_node->params.truncate != params->truncate ||
trigger_node->params.rate != params->rate ||
--
2.30.2
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH net-next 6/6] selftests: mlxsw: Test vetoing of double sampling
2021-03-29 10:09 [PATCH net-next 0/6] mlxsw: Two sampling fixes Ido Schimmel
` (4 preceding siblings ...)
2021-03-29 10:09 ` [PATCH net-next 5/6] mlxsw: spectrum: Veto sampling if already enabled on port Ido Schimmel
@ 2021-03-29 10:09 ` Ido Schimmel
2021-03-29 20:50 ` [PATCH net-next 0/6] mlxsw: Two sampling fixes patchwork-bot+netdevbpf
6 siblings, 0 replies; 8+ messages in thread
From: Ido Schimmel @ 2021-03-29 10:09 UTC (permalink / raw)
To: netdev; +Cc: davem, kuba, jiri, mlxsw, Ido Schimmel
From: Ido Schimmel <idosch@nvidia.com>
Test that two sampling rules cannot be configured on the same port with
the same trigger.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
---
.../selftests/drivers/net/mlxsw/tc_sample.sh | 30 +++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh b/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh
index 57b05f042787..093bed088ad0 100755
--- a/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh
@@ -34,6 +34,7 @@ lib_dir=$(dirname $0)/../../../net/forwarding
ALL_TESTS="
tc_sample_rate_test
tc_sample_max_rate_test
+ tc_sample_conflict_test
tc_sample_group_conflict_test
tc_sample_md_iif_test
tc_sample_md_lag_iif_test
@@ -272,6 +273,35 @@ tc_sample_max_rate_test()
log_test "tc sample maximum rate"
}
+tc_sample_conflict_test()
+{
+ RET=0
+
+ # Test that two sampling rules cannot be configured on the same port,
+ # even when they share the same parameters.
+
+ tc filter add dev $rp1 ingress protocol all pref 1 handle 101 matchall \
+ skip_sw action sample rate 1024 group 1
+ check_err $? "Failed to configure sampling rule"
+
+ tc filter add dev $rp1 ingress protocol all pref 2 handle 102 matchall \
+ skip_sw action sample rate 1024 group 1 &> /dev/null
+ check_fail $? "Managed to configure second sampling rule"
+
+ # Delete the first rule and make sure the second rule can now be
+ # configured.
+
+ tc filter del dev $rp1 ingress protocol all pref 1 handle 101 matchall
+
+ tc filter add dev $rp1 ingress protocol all pref 2 handle 102 matchall \
+ skip_sw action sample rate 1024 group 1
+ check_err $? "Failed to configure sampling rule after deletion"
+
+ log_test "tc sample conflict test"
+
+ tc filter del dev $rp1 ingress protocol all pref 2 handle 102 matchall
+}
+
tc_sample_group_conflict_test()
{
RET=0
--
2.30.2
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH net-next 0/6] mlxsw: Two sampling fixes
2021-03-29 10:09 [PATCH net-next 0/6] mlxsw: Two sampling fixes Ido Schimmel
` (5 preceding siblings ...)
2021-03-29 10:09 ` [PATCH net-next 6/6] selftests: mlxsw: Test vetoing of double sampling Ido Schimmel
@ 2021-03-29 20:50 ` patchwork-bot+netdevbpf
6 siblings, 0 replies; 8+ messages in thread
From: patchwork-bot+netdevbpf @ 2021-03-29 20:50 UTC (permalink / raw)
To: Ido Schimmel; +Cc: netdev, davem, kuba, jiri, mlxsw, idosch
Hello:
This series was applied to netdev/net-next.git (refs/heads/master):
On Mon, 29 Mar 2021 13:09:42 +0300 you wrote:
> From: Ido Schimmel <idosch@nvidia.com>
>
> This patchset fixes two bugs in recent sampling submissions.
>
> The first fix, in patch #3, prevents matchall rules with sample action
> to be added in front of flower rules on egress. Patches #1-#2 are
> preparations meant at avoiding similar bugs in the future. Patch #4 is a
> selftest.
>
> [...]
Here is the summary with links:
- [net-next,1/6] mlxsw: spectrum_matchall: Perform protocol check earlier
https://git.kernel.org/netdev/net-next/c/4947e7309a31
- [net-next,2/6] mlxsw: spectrum_matchall: Convert if statements to a switch statement
https://git.kernel.org/netdev/net-next/c/50401f292434
- [net-next,3/6] mlxsw: spectrum_matchall: Perform priority checks earlier
https://git.kernel.org/netdev/net-next/c/b24303048a6b
- [net-next,4/6] selftests: mlxsw: Test matchall failure with protocol match
https://git.kernel.org/netdev/net-next/c/c3572a0b731f
- [net-next,5/6] mlxsw: spectrum: Veto sampling if already enabled on port
https://git.kernel.org/netdev/net-next/c/17b96a5cbe3d
- [net-next,6/6] selftests: mlxsw: Test vetoing of double sampling
https://git.kernel.org/netdev/net-next/c/7ede22e65832
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2021-03-29 20:50 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-29 10:09 [PATCH net-next 0/6] mlxsw: Two sampling fixes Ido Schimmel
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