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drivers: net: netdevsim: add devlink trap_drop_counter_get implementation 

Whenever query statistics is issued for trap with DROP action,
devlink subsystem would also fill-in statistics 'dropped' field.
In case if device driver did't register callback for hard drop
statistics querying, 'dropped' field will be omitted and not filled.
Add trap_drop_counter_get callback implementation to the netdevsim.
Add new test cases for netdevsim, to test both the callback
functionality, as well as drop statistics alteration check.

Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oleksandr Mazur 2021-06-14 16:01:14 +03:00 committed by David S. Miller
parent 53f1bd6b28
commit a7b3527a43
2 changed files with 23 additions and 0 deletions
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22
drivers/net/netdevsim/dev.c
View File

@ -269,6 +269,9 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
err = PTR_ERR(nsim_dev->nodes_ddir);
goto err_out;
}
debugfs_create_bool("fail_trap_counter_get", 0600,
nsim_dev->ddir,
&nsim_dev->fail_trap_counter_get);
nsim_udp_tunnels_debugfs_create(nsim_dev);
return 0;
@ -563,6 +566,7 @@ struct nsim_trap_data {
struct delayed_work trap_report_dw;
struct nsim_trap_item *trap_items_arr;
u64 *trap_policers_cnt_arr;
u64 trap_pkt_cnt;
struct nsim_dev *nsim_dev;
spinlock_t trap_lock; /* Protects trap_items_arr */
};
@ -1203,6 +1207,23 @@ static int nsim_rate_node_parent_set(struct devlink_rate *child,
return 0;
}
static int
nsim_dev_devlink_trap_hw_counter_get(struct devlink *devlink,
const struct devlink_trap *trap,
u64 *p_drops)
{
struct nsim_dev *nsim_dev = devlink_priv(devlink);
u64 *cnt;
if (nsim_dev->fail_trap_counter_get)
return -EINVAL;
cnt = &nsim_dev->trap_data->trap_pkt_cnt;
*p_drops = (*cnt)++;
return 0;
}
static const struct devlink_ops nsim_dev_devlink_ops = {
.eswitch_mode_set = nsim_devlink_eswitch_mode_set,
.eswitch_mode_get = nsim_devlink_eswitch_mode_get,
@ -1226,6 +1247,7 @@ static const struct devlink_ops nsim_dev_devlink_ops = {
.rate_node_del = nsim_rate_node_del,
.rate_leaf_parent_set = nsim_rate_leaf_parent_set,
.rate_node_parent_set = nsim_rate_node_parent_set,
.trap_drop_counter_get = nsim_dev_devlink_trap_hw_counter_get,
};
#define NSIM_DEV_MAX_MACS_DEFAULT 32

1
drivers/net/netdevsim/netdevsim.h
View File

@ -249,6 +249,7 @@ struct nsim_dev {
bool fail_trap_group_set;
bool fail_trap_policer_set;
bool fail_trap_policer_counter_get;
bool fail_trap_counter_get;
struct {
struct udp_tunnel_nic_shared utn_shared;
u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];