This patch adds a function to check if flow block callback is already in
use. Call this new function from flow_block_cb_setup_simple() and from
drivers.
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
---
v4: no changes.
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 4 ++++
drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 4 ++++
drivers/net/ethernet/mscc/ocelot_tc.c | 3 +++
drivers/net/ethernet/netronome/nfp/flower/offload.c | 4 ++++
include/net/flow_offload.h | 3 +++
net/core/flow_offload.c | 18 ++++++++++++++++++
net/dsa/slave.c | 3 +++
7 files changed, 39 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 897a9511227c..b976f16e828c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -721,6 +721,10 @@ mlx5e_rep_indr_setup_tc_block(struct net_device *netdev,
if (indr_priv)
return -EEXIST;
+ if (flow_block_cb_is_busy(mlx5e_rep_indr_setup_block_cb,
+ indr_priv, &mlx5e_block_cb_list))
+ return -EBUSY;
+
indr_priv = kmalloc(sizeof(*indr_priv), GFP_KERNEL);
if (!indr_priv)
return -ENOMEM;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 65bea6be84d6..35adc174f277 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1698,6 +1698,10 @@ static int mlxsw_sp_setup_tc_block(struct mlxsw_sp_port
*mlxsw_sp_port,
switch (f->command) {
case FLOW_BLOCK_BIND:
+ if (flow_block_cb_is_busy(cb, mlxsw_sp_port,
+ &mlxsw_sp_block_cb_list))
+ return -EBUSY;
+
block_cb = flow_block_cb_alloc(f->net, cb, mlxsw_sp_port,
mlxsw_sp_port, NULL);
if (IS_ERR(block_cb))
diff --git a/drivers/net/ethernet/mscc/ocelot_tc.c
b/drivers/net/ethernet/mscc/ocelot_tc.c
index 935a774cb291..9e6464ffae5d 100644
--- a/drivers/net/ethernet/mscc/ocelot_tc.c
+++ b/drivers/net/ethernet/mscc/ocelot_tc.c
@@ -153,6 +153,9 @@ static int ocelot_setup_tc_block(struct ocelot_port *port,
switch (f->command) {
case FLOW_BLOCK_BIND:
+ if (flow_block_cb_is_busy(cb, port, &ocelot_block_cb_list))
+ return -EBUSY;
+
block_cb = flow_block_cb_alloc(f->net, cb, port, port, NULL);
if (IS_ERR(block_cb))
return PTR_ERR(block_cb);
diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c
b/drivers/net/ethernet/netronome/nfp/flower/offload.c
index ddd6b509f27e..1b38cfeb646c 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -1320,6 +1320,10 @@ static int nfp_flower_setup_tc_block(struct net_device
*netdev,
switch (f->command) {
case FLOW_BLOCK_BIND:
+ if (flow_block_cb_is_busy(nfp_flower_setup_tc_block_cb, repr,
+ &nfp_block_cb_list))
+ return -EBUSY;
+
block_cb = flow_block_cb_alloc(f->net,
nfp_flower_setup_tc_block_cb,
repr, repr, NULL);
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index e8ff62ba1d8f..2e780dbee168 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -291,6 +291,9 @@ static inline void flow_block_cb_remove(struct
flow_block_cb *block_cb,
list_move(&block_cb->list, &offload->cb_list);
}
+bool flow_block_cb_is_busy(tc_setup_cb_t *cb, void *cb_ident,
+ struct list_head *driver_block_list);
+
int flow_block_cb_setup_simple(struct flow_block_offload *f,
struct list_head *driver_list, tc_setup_cb_t *cb,
void *cb_ident, void *cb_priv, bool
ingress_only);
diff --git a/net/core/flow_offload.c b/net/core/flow_offload.c
index a1b36b47dd89..76f8db3841d7 100644
--- a/net/core/flow_offload.c
+++ b/net/core/flow_offload.c
@@ -228,6 +228,21 @@ unsigned int flow_block_cb_decref(struct flow_block_cb
*block_cb)
}
EXPORT_SYMBOL(flow_block_cb_decref);
+bool flow_block_cb_is_busy(tc_setup_cb_t *cb, void *cb_ident,
+ struct list_head *driver_block_list)
+{
+ struct flow_block_cb *block_cb;
+
+ list_for_each_entry(block_cb, driver_block_list, driver_list) {
+ if (block_cb->cb == cb &&
+ block_cb->cb_ident == cb_ident)
+ return true;
+ }
+
+ return false;
+}
+EXPORT_SYMBOL(flow_block_cb_is_busy);
+
int flow_block_cb_setup_simple(struct flow_block_offload *f,
struct list_head *driver_block_list,
tc_setup_cb_t *cb, void *cb_ident, void *cb_priv,
@@ -243,6 +258,9 @@ int flow_block_cb_setup_simple(struct flow_block_offload *f,
switch (f->command) {
case FLOW_BLOCK_BIND:
+ if (flow_block_cb_is_busy(cb, cb_ident, driver_block_list))
+ return -EBUSY;
+
block_cb = flow_block_cb_alloc(f->net, cb, cb_ident,
cb_priv, NULL);
if (IS_ERR(block_cb))
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 90c32fd680db..9bcb598fc840 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -961,6 +961,9 @@ static int dsa_slave_setup_tc_block(struct net_device *dev,
switch (f->command) {
case FLOW_BLOCK_BIND:
+ if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
+ return -EBUSY;
+
block_cb = flow_block_cb_alloc(f->net, cb, dev, dev, NULL);
if (IS_ERR(block_cb))
return PTR_ERR(block_cb);
--
2.11.0
