[patch net-next v4 03/10] flow_offload: check for basic action hw stats type

Jiri Pirko
2020-03-07T11:40:35Z

From: Jiri Pirko <jiri@mellanox.com>

Introduce flow_action_basic_hw_stats_types_check() helper and use it
in drivers. That sanitizes the drivers which do not have support
for action HW stats types.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
---
v3->v4:
- fixed entries iteration in check (s/0/i/)
- compare allowed type explicitly to 0 to avoid confusion
v2->v3:
- added flow_action_hw_stats_types_check() to pass allowed types
- "mixed" bool got remove, iterate entries in check
- added mlx5 checking instead of separate patches (will be changed by
later patch to flow_action_hw_stats_types_check()
v1->v2:
- new patch
---
drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c | 9 ++-
.../ethernet/chelsio/cxgb4/cxgb4_tc_flower.c | 8 ++-
.../ethernet/chelsio/cxgb4/cxgb4_tc_flower.h | 3 +-
.../chelsio/cxgb4/cxgb4_tc_matchall.c | 3 +-
.../net/ethernet/marvell/mvpp2/mvpp2_cls.c | 6 ++
.../net/ethernet/mellanox/mlx5/core/en_tc.c | 9 +++
drivers/net/ethernet/mscc/ocelot_flower.c | 4 ++
.../ethernet/netronome/nfp/flower/action.c | 4 ++
.../net/ethernet/qlogic/qede/qede_filter.c | 10 ++-
.../net/ethernet/stmicro/stmmac/stmmac_tc.c | 9 ++-
include/net/flow_offload.h | 61 +++++++++++++++++++
net/dsa/slave.c | 4 ++
12 files changed, 119 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
index 9bec256b0934..523bf4be43cc 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
@@ -279,7 +279,8 @@ bnxt_tc_parse_pedit(struct bnxt *bp, struct bnxt_tc_actions *actions,

static int bnxt_tc_parse_actions(struct bnxt *bp,
struct bnxt_tc_actions *actions,
- struct flow_action *flow_action)
+ struct flow_action *flow_action,
+ struct netlink_ext_ack *extack)
{
/* Used to store the L2 rewrite mask for dmac (6 bytes) followed by
* smac (6 bytes) if rewrite of both is specified, otherwise either
@@ -299,6 +300,9 @@ static int bnxt_tc_parse_actions(struct bnxt *bp,
return -EINVAL;
}

+ if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+ return -EOPNOTSUPP;
+
flow_action_for_each(i, act, flow_action) {
switch (act->id) {
case FLOW_ACTION_DROP:
@@ -491,7 +495,8 @@ static int bnxt_tc_parse_flow(struct bnxt *bp,
flow->tun_mask.tp_src = match.mask->src;
}

- return bnxt_tc_parse_actions(bp, &flow->actions, &rule->action);
+ return bnxt_tc_parse_actions(bp, &flow->actions, &rule->action,
+ tc_flow_cmd->common.extack);
}

static int bnxt_hwrm_cfa_flow_free(struct bnxt *bp,
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
index bb5513bdd293..cc46277e98de 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
@@ -544,7 +544,8 @@ static bool valid_pedit_action(struct net_device *dev,
}

int cxgb4_validate_flow_actions(struct net_device *dev,
- struct flow_action *actions)
+ struct flow_action *actions,
+ struct netlink_ext_ack *extack)
{
struct flow_action_entry *act;
bool act_redir = false;
@@ -552,6 +553,9 @@ int cxgb4_validate_flow_actions(struct net_device *dev,
bool act_vlan = false;
int i;

+ if (!flow_action_basic_hw_stats_types_check(actions, extack))
+ return -EOPNOTSUPP;
+
flow_action_for_each(i, act, actions) {
switch (act->id) {
case FLOW_ACTION_ACCEPT:
@@ -642,7 +646,7 @@ int cxgb4_tc_flower_replace(struct net_device *dev,
struct filter_ctx ctx;
int fidx, ret;

- if (cxgb4_validate_flow_actions(dev, &rule->action))
+ if (cxgb4_validate_flow_actions(dev, &rule->action, extack))
return -EOPNOTSUPP;

if (cxgb4_validate_flow_match(dev, cls))
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.h
index e132516e9868..0a30c96b81ff 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.h
@@ -112,7 +112,8 @@ void cxgb4_process_flow_actions(struct net_device *in,
struct flow_action *actions,
struct ch_filter_specification *fs);
int cxgb4_validate_flow_actions(struct net_device *dev,
- struct flow_action *actions);
+ struct flow_action *actions,
+ struct netlink_ext_ack *extack);

int cxgb4_tc_flower_replace(struct net_device *dev,
struct flow_cls_offload *cls);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
index 1b7681a4eb32..d80dee4d316d 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
@@ -286,7 +286,8 @@ int cxgb4_tc_matchall_replace(struct net_device *dev,
}

ret = cxgb4_validate_flow_actions(dev,
- &cls_matchall->rule->action);
+ &cls_matchall->rule->action,
+ extack);
if (ret)
return ret;

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
index 35478cba2aa5..0a0c6ec2336c 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
@@ -1082,6 +1082,9 @@ static int mvpp2_port_c2_tcam_rule_add(struct mvpp2_port *port,
u8 qh, ql, pmap;
int index, ctx;

+ if (!flow_action_basic_hw_stats_types_check(&rule->flow->action, NULL))
+ return -EOPNOTSUPP;
+
memset(&c2, 0, sizeof(c2));

index = mvpp2_cls_c2_port_flow_index(port, rule->loc);
@@ -1305,6 +1308,9 @@ static int mvpp2_cls_rfs_parse_rule(struct mvpp2_rfs_rule *rule)
struct flow_rule *flow = rule->flow;
struct flow_action_entry *act;

+ if (!flow_action_basic_hw_stats_types_check(&rule->flow->action, NULL))
+ return -EOPNOTSUPP;
+
act = &flow->action.entries[0];
if (act->id != FLOW_ACTION_QUEUE && act->id != FLOW_ACTION_DROP)
return -EOPNOTSUPP;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 4eb2f2392d2d..cfe393cb4026 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -2878,6 +2878,9 @@ static int parse_tc_nic_actions(struct mlx5e_priv *priv,
if (!flow_action_has_entries(flow_action))
return -EINVAL;

+ if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+ return -EOPNOTSUPP;
+
attr->flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;

flow_action_for_each(i, act, flow_action) {
@@ -3330,6 +3333,9 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
if (!flow_action_has_entries(flow_action))
return -EINVAL;

+ if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+ return -EOPNOTSUPP;
+
flow_action_for_each(i, act, flow_action) {
switch (act->id) {
case FLOW_ACTION_DROP:
@@ -4148,6 +4154,9 @@ static int scan_tc_matchall_fdb_actions(struct mlx5e_priv *priv,
return -EOPNOTSUPP;
}

+ if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+ return -EOPNOTSUPP;
+
flow_action_for_each(i, act, flow_action) {
switch (act->id) {
case FLOW_ACTION_POLICE:
diff --git a/drivers/net/ethernet/mscc/ocelot_flower.c b/drivers/net/ethernet/mscc/ocelot_flower.c
index 8986f209e981..6d84173373c7 100644
--- a/drivers/net/ethernet/mscc/ocelot_flower.c
+++ b/drivers/net/ethernet/mscc/ocelot_flower.c
@@ -17,6 +17,10 @@ static int ocelot_flower_parse_action(struct flow_cls_offload *f,
if (!flow_offload_has_one_action(&f->rule->action))
return -EOPNOTSUPP;

+ if (!flow_action_basic_hw_stats_types_check(&f->rule->action,
+ f->common.extack))
+ return -EOPNOTSUPP;
+
flow_action_for_each(i, a, &f->rule->action) {
switch (a->id) {
case FLOW_ACTION_DROP:
diff --git a/drivers/net/ethernet/netronome/nfp/flower/action.c b/drivers/net/ethernet/netronome/nfp/flower/action.c
index c06600fb47ff..4aa7346cb040 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/action.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/action.c
@@ -1207,6 +1207,10 @@ int nfp_flower_compile_action(struct nfp_app *app,
bool pkt_host = false;
u32 csum_updated = 0;

+ if (!flow_action_basic_hw_stats_types_check(&flow->rule->action,
+ extack))
+ return -EOPNOTSUPP;
+
memset(nfp_flow->action_data, 0, NFP_FL_MAX_A_SIZ);
nfp_flow->meta.act_len = 0;
tun_type = NFP_FL_TUNNEL_NONE;
diff --git a/drivers/net/ethernet/qlogic/qede/qede_filter.c b/drivers/net/ethernet/qlogic/qede/qede_filter.c
index d1ce4531d01a..6505f7e2d1db 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_filter.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_filter.c
@@ -1746,7 +1746,8 @@ int qede_get_arfs_filter_count(struct qede_dev *edev)
}

static int qede_parse_actions(struct qede_dev *edev,
- struct flow_action *flow_action)
+ struct flow_action *flow_action,
+ struct netlink_ext_ack *extack)
{
const struct flow_action_entry *act;
int i;
@@ -1756,6 +1757,9 @@ static int qede_parse_actions(struct qede_dev *edev,
return -EINVAL;
}

+ if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+ return -EOPNOTSUPP;
+
flow_action_for_each(i, act, flow_action) {
switch (act->id) {
case FLOW_ACTION_DROP:
@@ -1970,7 +1974,7 @@ int qede_add_tc_flower_fltr(struct qede_dev *edev, __be16 proto,
}

/* parse tc actions and get the vf_id */
- if (qede_parse_actions(edev, &f->rule->action))
+ if (qede_parse_actions(edev, &f->rule->action, f->common.extack))
goto unlock;

if (qede_flow_find_fltr(edev, &t)) {
@@ -2038,7 +2042,7 @@ static int qede_flow_spec_validate(struct qede_dev *edev,
return -EINVAL;
}

- if (qede_parse_actions(edev, flow_action))
+ if (qede_parse_actions(edev, flow_action, NULL))
return -EINVAL;

return 0;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 7a01dee2f9a8..a0e6118444b0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -367,7 +367,8 @@ static int tc_setup_cbs(struct stmmac_priv *priv,

static int tc_parse_flow_actions(struct stmmac_priv *priv,
struct flow_action *action,
- struct stmmac_flow_entry *entry)
+ struct stmmac_flow_entry *entry,
+ struct netlink_ext_ack *extack)
{
struct flow_action_entry *act;
int i;
@@ -375,6 +376,9 @@ static int tc_parse_flow_actions(struct stmmac_priv *priv,
if (!flow_action_has_entries(action))
return -EINVAL;

+ if (!flow_action_basic_hw_stats_types_check(action, extack))
+ return -EOPNOTSUPP;
+
flow_action_for_each(i, act, action) {
switch (act->id) {
case FLOW_ACTION_DROP:
@@ -530,7 +534,8 @@ static int tc_add_flow(struct stmmac_priv *priv,
return -ENOENT;
}

- ret = tc_parse_flow_actions(priv, &rule->action, entry);
+ ret = tc_parse_flow_actions(priv, &rule->action, entry,
+ cls->common.extack);
if (ret)
return ret;

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 93d17f37e980..8b40f612a565 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -3,6 +3,7 @@

#include <linux/kernel.h>
#include <linux/list.h>
+#include <linux/netlink.h>
#include <net/flow_dissector.h>
#include <linux/rhashtable.h>

@@ -251,6 +252,66 @@ static inline bool flow_offload_has_one_action(const struct flow_action *action)
return action->num_entries == 1;
}

+static inline bool
+flow_action_mixed_hw_stats_types_check(const struct flow_action *action,
+ struct netlink_ext_ack *extack)
+{
+ const struct flow_action_entry *action_entry;
+ u8 uninitialized_var(last_hw_stats_type);
+ int i;
+
+ if (flow_offload_has_one_action(action))
+ return true;
+
+ for (i = 0; i < action->num_entries; i++) {
+ action_entry = &action->entries[i];
+ if (i && action_entry->hw_stats_type != last_hw_stats_type) {
+ NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
+ return false;
+ }
+ last_hw_stats_type = action_entry->hw_stats_type;
+ }
+ return true;
+}
+
+static inline const struct flow_action_entry *
+flow_action_first_entry_get(const struct flow_action *action)
+{
+ WARN_ON(!flow_action_has_entries(action));
+ return &action->entries[0];
+}
+
+static inline bool
+flow_action_hw_stats_types_check(const struct flow_action *action,
+ struct netlink_ext_ack *extack,
+ u8 allowed_hw_stats_type)
+{
+ const struct flow_action_entry *action_entry;
+
+ if (!flow_action_has_entries(action))
+ return true;
+ if (!flow_action_mixed_hw_stats_types_check(action, extack))
+ return false;
+ action_entry = flow_action_first_entry_get(action);
+ if (allowed_hw_stats_type == 0 &&
+ action_entry->hw_stats_type != FLOW_ACTION_HW_STATS_TYPE_ANY) {
+ NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
+ return false;
+ } else if (allowed_hw_stats_type != 0 &&
+ action_entry->hw_stats_type != allowed_hw_stats_type) {
+ NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
+ return false;
+ }
+ return true;
+}
+
+static inline bool
+flow_action_basic_hw_stats_types_check(const struct flow_action *action,
+ struct netlink_ext_ack *extack)
+{
+ return flow_action_hw_stats_types_check(action, extack, 0);
+}
+
#define flow_action_for_each(__i, __act, __actions) \
for (__i = 0, __act = &(__actions)->entries[0]; __i < (__actions)->num_entries; __act = &(__actions)->entries[++__i])

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 79d9b4384d7b..fca9bfa8437e 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -865,6 +865,10 @@ static int dsa_slave_add_cls_matchall(struct net_device *dev,
if (!flow_offload_has_one_action(&cls->rule->action))
return err;

+ if (!flow_action_basic_hw_stats_types_check(&cls->rule->action,
+ cls->common.extack))
+ return err;
+
act = &cls->rule->action.entries[0];

if (act->id == FLOW_ACTION_MIRRED && protocol == htons(ETH_P_ALL)) {
--
2.21.1