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net: flow_offload: add flow_block_cb_is_busy() and use it

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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 <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2019-07-09 22:55:48 +02:00 committed by David S. Miller
parent 722d36e6e2
commit 0d4fd02e71
7 changed files with 39 additions and 0 deletions
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4
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
View File

@ -722,6 +722,10 @@ 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;

4
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -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))

3
drivers/net/ethernet/mscc/ocelot_tc.c
View File

@ -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);

4
drivers/net/ethernet/netronome/nfp/flower/offload.c
View File

@ -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);

3
include/net/flow_offload.h
View File

@ -296,6 +296,9 @@ 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);

18
net/core/flow_offload.c
View File

@ -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))

3
net/dsa/slave.c
View File

@ -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);