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-rw-r--r--drivers/net/ethernet/mellanox/mlx4/main.c4
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/devlink.c4
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/core.c4
-rw-r--r--drivers/net/netdevsim/dev.c6
-rw-r--r--include/net/devlink.h8
-rw-r--r--include/uapi/linux/devlink.h14
-rw-r--r--net/core/devlink.c92
7 files changed, 119 insertions, 13 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 649c5323cf9f..c326b434734e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -3947,6 +3947,7 @@ static int mlx4_restart_one_up(struct pci_dev *pdev, bool reload,
static int mlx4_devlink_reload_down(struct devlink *devlink, bool netns_change,
enum devlink_reload_action action,
+ enum devlink_reload_limit limit,
struct netlink_ext_ack *extack)
{
struct mlx4_priv *priv = devlink_priv(devlink);
@@ -3964,7 +3965,8 @@ static int mlx4_devlink_reload_down(struct devlink *devlink, bool netns_change,
}
static int mlx4_devlink_reload_up(struct devlink *devlink, enum devlink_reload_action action,
- u32 *actions_performed, struct netlink_ext_ack *extack)
+ enum devlink_reload_limit limit, u32 *actions_performed,
+ struct netlink_ext_ack *extack)
{
struct mlx4_priv *priv = devlink_priv(devlink);
struct mlx4_dev *dev = &priv->dev;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index 1b248c01a209..0016041e8779 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -86,6 +86,7 @@ mlx5_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
enum devlink_reload_action action,
+ enum devlink_reload_limit limit,
struct netlink_ext_ack *extack)
{
struct mlx5_core_dev *dev = devlink_priv(devlink);
@@ -95,7 +96,8 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
}
static int mlx5_devlink_reload_up(struct devlink *devlink, enum devlink_reload_action action,
- u32 *actions_performed, struct netlink_ext_ack *extack)
+ enum devlink_reload_limit limit, u32 *actions_performed,
+ struct netlink_ext_ack *extack)
{
struct mlx5_core_dev *dev = devlink_priv(devlink);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index cd9f56c73827..7f77c2a71d1c 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1415,6 +1415,7 @@ mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
static int
mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink,
bool netns_change, enum devlink_reload_action action,
+ enum devlink_reload_limit limit,
struct netlink_ext_ack *extack)
{
struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
@@ -1428,7 +1429,8 @@ mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink,
static int
mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink, enum devlink_reload_action action,
- u32 *actions_performed, struct netlink_ext_ack *extack)
+ enum devlink_reload_limit limit, u32 *actions_performed,
+ struct netlink_ext_ack *extack)
{
struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index b57e35c4ef6f..d07061417675 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -701,7 +701,8 @@ static int nsim_dev_reload_create(struct nsim_dev *nsim_dev,
static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev);
static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
- enum devlink_reload_action action, struct netlink_ext_ack *extack)
+ enum devlink_reload_action action, enum devlink_reload_limit limit,
+ struct netlink_ext_ack *extack)
{
struct nsim_dev *nsim_dev = devlink_priv(devlink);
@@ -718,7 +719,8 @@ static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change,
}
static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_action action,
- u32 *actions_performed, struct netlink_ext_ack *extack)
+ enum devlink_reload_limit limit, u32 *actions_performed,
+ struct netlink_ext_ack *extack)
{
struct nsim_dev *nsim_dev = devlink_priv(devlink);
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 93c535ae5a4b..9f5c37c391f8 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1151,10 +1151,14 @@ struct devlink_ops {
*/
u32 supported_flash_update_params;
unsigned long reload_actions;
+ unsigned long reload_limits;
int (*reload_down)(struct devlink *devlink, bool netns_change,
- enum devlink_reload_action action, struct netlink_ext_ack *extack);
+ enum devlink_reload_action action,
+ enum devlink_reload_limit limit,
+ struct netlink_ext_ack *extack);
int (*reload_up)(struct devlink *devlink, enum devlink_reload_action action,
- u32 *actions_performed, struct netlink_ext_ack *extack);
+ enum devlink_reload_limit limit, u32 *actions_performed,
+ struct netlink_ext_ack *extack);
int (*port_type_set)(struct devlink_port *devlink_port,
enum devlink_port_type port_type);
int (*port_split)(struct devlink *devlink, unsigned int port_index,
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 74bdad252c36..82a5e66c1518 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -311,6 +311,19 @@ enum devlink_reload_action {
DEVLINK_RELOAD_ACTION_MAX = __DEVLINK_RELOAD_ACTION_MAX - 1
};
+enum devlink_reload_limit {
+ DEVLINK_RELOAD_LIMIT_UNSPEC, /* unspecified, no constraints */
+ DEVLINK_RELOAD_LIMIT_NO_RESET, /* No reset allowed, no down time allowed,
+ * no link flap and no configuration is lost.
+ */
+
+ /* Add new reload limit above */
+ __DEVLINK_RELOAD_LIMIT_MAX,
+ DEVLINK_RELOAD_LIMIT_MAX = __DEVLINK_RELOAD_LIMIT_MAX - 1
+};
+
+#define DEVLINK_RELOAD_LIMITS_VALID_MASK (BIT(__DEVLINK_RELOAD_LIMIT_MAX) - 1)
+
enum devlink_attr {
/* don't change the order or add anything between, this is ABI! */
DEVLINK_ATTR_UNSPEC,
@@ -505,6 +518,7 @@ enum devlink_attr {
DEVLINK_ATTR_RELOAD_ACTION, /* u8 */
DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, /* bitfield32 */
+ DEVLINK_ATTR_RELOAD_LIMITS, /* bitfield32 */
/* add new attributes above here, update the policy in devlink.c */
diff --git a/net/core/devlink.c b/net/core/devlink.c
index c026ed3519c9..28b63faa3c6b 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -479,12 +479,44 @@ static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
return 0;
}
+struct devlink_reload_combination {
+ enum devlink_reload_action action;
+ enum devlink_reload_limit limit;
+};
+
+static const struct devlink_reload_combination devlink_reload_invalid_combinations[] = {
+ {
+ /* can't reinitialize driver with no down time */
+ .action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
+ .limit = DEVLINK_RELOAD_LIMIT_NO_RESET,
+ },
+};
+
+static bool
+devlink_reload_combination_is_invalid(enum devlink_reload_action action,
+ enum devlink_reload_limit limit)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++)
+ if (devlink_reload_invalid_combinations[i].action == action &&
+ devlink_reload_invalid_combinations[i].limit == limit)
+ return true;
+ return false;
+}
+
static bool
devlink_reload_action_is_supported(struct devlink *devlink, enum devlink_reload_action action)
{
return test_bit(action, &devlink->ops->reload_actions);
}
+static bool
+devlink_reload_limit_is_supported(struct devlink *devlink, enum devlink_reload_limit limit)
+{
+ return test_bit(limit, &devlink->ops->reload_limits);
+}
+
static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
@@ -2990,22 +3022,22 @@ bool devlink_is_reload_failed(const struct devlink *devlink)
EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
static int devlink_reload(struct devlink *devlink, struct net *dest_net,
- enum devlink_reload_action action, u32 *actions_performed,
- struct netlink_ext_ack *extack)
+ enum devlink_reload_action action, enum devlink_reload_limit limit,
+ u32 *actions_performed, struct netlink_ext_ack *extack)
{
int err;
if (!devlink->reload_enabled)
return -EOPNOTSUPP;
- err = devlink->ops->reload_down(devlink, !!dest_net, action, extack);
+ err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, extack);
if (err)
return err;
if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
devlink_reload_netns_change(devlink, dest_net);
- err = devlink->ops->reload_up(devlink, action, actions_performed, extack);
+ err = devlink->ops->reload_up(devlink, action, limit, actions_performed, extack);
devlink_reload_failed_set(devlink, !!err);
if (err)
return err;
@@ -3050,6 +3082,7 @@ static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
enum devlink_reload_action action;
+ enum devlink_reload_limit limit;
struct net *dest_net = NULL;
u32 actions_performed;
int err;
@@ -3082,7 +3115,38 @@ static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
return -EOPNOTSUPP;
}
- err = devlink_reload(devlink, dest_net, action, &actions_performed, info->extack);
+ limit = DEVLINK_RELOAD_LIMIT_UNSPEC;
+ if (info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) {
+ struct nla_bitfield32 limits;
+ u32 limits_selected;
+
+ limits = nla_get_bitfield32(info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]);
+ limits_selected = limits.value & limits.selector;
+ if (!limits_selected) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Invalid limit selected");
+ return -EINVAL;
+ }
+ for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++)
+ if (limits_selected & BIT(limit))
+ break;
+ /* UAPI enables multiselection, but currently it is not used */
+ if (limits_selected != BIT(limit)) {
+ NL_SET_ERR_MSG_MOD(info->extack,
+ "Multiselection of limit is not supported");
+ return -EOPNOTSUPP;
+ }
+ if (!devlink_reload_limit_is_supported(devlink, limit)) {
+ NL_SET_ERR_MSG_MOD(info->extack,
+ "Requested limit is not supported by the driver");
+ return -EOPNOTSUPP;
+ }
+ if (devlink_reload_combination_is_invalid(action, limit)) {
+ NL_SET_ERR_MSG_MOD(info->extack,
+ "Requested limit is invalid for this action");
+ return -EINVAL;
+ }
+ }
+ err = devlink_reload(devlink, dest_net, action, limit, &actions_performed, info->extack);
if (dest_net)
put_net(dest_net);
@@ -3090,7 +3154,7 @@ static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
if (err)
return err;
/* For backward compatibility generate reply only if attributes used by user */
- if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION])
+ if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION] && !info->attrs[DEVLINK_ATTR_RELOAD_LIMITS])
return 0;
return devlink_nl_reload_actions_performed_snd(devlink, actions_performed,
@@ -7347,6 +7411,7 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_PORT_FUNCTION] = { .type = NLA_NESTED },
[DEVLINK_ATTR_RELOAD_ACTION] = NLA_POLICY_RANGE(NLA_U8, DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
DEVLINK_RELOAD_ACTION_MAX),
+ [DEVLINK_ATTR_RELOAD_LIMITS] = NLA_POLICY_BITFIELD32(DEVLINK_RELOAD_LIMITS_VALID_MASK),
};
static const struct genl_small_ops devlink_nl_ops[] = {
@@ -7682,6 +7747,9 @@ static struct genl_family devlink_nl_family __ro_after_init = {
static bool devlink_reload_actions_valid(const struct devlink_ops *ops)
{
+ const struct devlink_reload_combination *comb;
+ int i;
+
if (!devlink_reload_supported(ops)) {
if (WARN_ON(ops->reload_actions))
return false;
@@ -7692,6 +7760,17 @@ static bool devlink_reload_actions_valid(const struct devlink_ops *ops)
ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX)))
return false;
+
+ if (WARN_ON(ops->reload_limits & BIT(DEVLINK_RELOAD_LIMIT_UNSPEC) ||
+ ops->reload_limits >= BIT(__DEVLINK_RELOAD_LIMIT_MAX)))
+ return false;
+
+ for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) {
+ comb = &devlink_reload_invalid_combinations[i];
+ if (ops->reload_actions == BIT(comb->action) &&
+ ops->reload_limits == BIT(comb->limit))
+ return false;
+ }
return true;
}
@@ -10056,6 +10135,7 @@ static void __net_exit devlink_pernet_pre_exit(struct net *net)
continue;
err = devlink_reload(devlink, &init_net,
DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
+ DEVLINK_RELOAD_LIMIT_UNSPEC,
&actions_performed, NULL);
if (err && err != -EOPNOTSUPP)
pr_warn("Failed to reload devlink instance into init_net\n");
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-23 17:07:06 +0300