From: Leon Romanovsky <leonro@nvidia.com>
Date: Tue, 12 Oct 2021 16:15:26 +0300
Subject: devlink: Delete reload enable/disable interface
Patch-mainline: v5.16-rc1
Git-commit: 82465bec3e9713c395b0a02f5aaf7949443cb877
References: jsc#SLE-19253
Commit a0c76345e3d3 ("devlink: disallow reload operation during device
cleanup") added devlink_reload_{enable,disable}() APIs to prevent reload
operation from racing with device probe/dismantle.
After recent changes to move devlink_register() to the end of device
probe and devlink_unregister() to the beginning of device dismantle,
these races can no longer happen. Reload operations will be denied if
the devlink instance is unregistered and devlink_unregister() will block
until all in-flight operations are done.
Therefore, remove these devlink_reload_{enable,disable}() APIs.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c | 3
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_devlink.c | 3
drivers/net/ethernet/mellanox/mlx4/main.c | 2
drivers/net/ethernet/mellanox/mlx5/core/main.c | 3
drivers/net/ethernet/mellanox/mlx5/core/sf/dev/driver.c | 5 -
drivers/net/ethernet/mellanox/mlxsw/core.c | 7 -
drivers/net/netdevsim/dev.c | 3
include/net/devlink.h | 2
net/core/devlink.c | 47 -----------
9 files changed, 6 insertions(+), 69 deletions(-)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c
@@ -121,7 +121,6 @@ int hclge_devlink_init(struct hclge_dev
devlink_set_features(devlink, DEVLINK_F_RELOAD);
devlink_register(devlink);
- devlink_reload_enable(devlink);
return 0;
}
@@ -129,8 +128,6 @@ void hclge_devlink_uninit(struct hclge_d
{
struct devlink *devlink = hdev->devlink;
- devlink_reload_disable(devlink);
-
devlink_unregister(devlink);
devlink_free(devlink);
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_devlink.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_devlink.c
@@ -123,7 +123,6 @@ int hclgevf_devlink_init(struct hclgevf_
devlink_set_features(devlink, DEVLINK_F_RELOAD);
devlink_register(devlink);
- devlink_reload_enable(devlink);
return 0;
}
@@ -131,8 +130,6 @@ void hclgevf_devlink_uninit(struct hclge
{
struct devlink *devlink = hdev->devlink;
- devlink_reload_disable(devlink);
-
devlink_unregister(devlink);
devlink_free(devlink);
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -4027,7 +4027,6 @@ static int mlx4_init_one(struct pci_dev
pci_save_state(pdev);
devlink_set_features(devlink, DEVLINK_F_RELOAD);
devlink_register(devlink);
- devlink_reload_enable(devlink);
return 0;
err_params_unregister:
@@ -4136,7 +4135,6 @@ static void mlx4_remove_one(struct pci_d
struct devlink *devlink = priv_to_devlink(priv);
int active_vfs = 0;
- devlink_reload_disable(devlink);
devlink_unregister(devlink);
if (mlx4_is_slave(dev))
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -1538,8 +1538,6 @@ static int probe_one(struct pci_dev *pde
pci_save_state(pdev);
devlink_register(devlink);
- if (!mlx5_core_is_mp_slave(dev))
- devlink_reload_enable(devlink);
return 0;
err_init_one:
@@ -1559,7 +1557,6 @@ static void remove_one(struct pci_dev *p
struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
struct devlink *devlink = priv_to_devlink(dev);
- devlink_reload_disable(devlink);
devlink_unregister(devlink);
mlx5_crdump_disable(dev);
mlx5_drain_health_wq(dev);
--- a/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/driver.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/sf/dev/driver.c
@@ -47,7 +47,6 @@ static int mlx5_sf_dev_probe(struct auxi
goto init_one_err;
}
devlink_register(devlink);
- devlink_reload_enable(devlink);
return 0;
init_one_err:
@@ -62,10 +61,8 @@ mdev_err:
static void mlx5_sf_dev_remove(struct auxiliary_device *adev)
{
struct mlx5_sf_dev *sf_dev = container_of(adev, struct mlx5_sf_dev, adev);
- struct devlink *devlink;
+ struct devlink *devlink = priv_to_devlink(sf_dev->mdev);
- devlink = priv_to_devlink(sf_dev->mdev);
- devlink_reload_disable(devlink);
devlink_unregister(devlink);
mlx5_uninit_one(sf_dev->mdev);
iounmap(sf_dev->mdev->iseg);
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -2010,9 +2010,7 @@ __mlxsw_core_bus_device_register(const s
if (!reload) {
devlink_set_features(devlink, DEVLINK_F_RELOAD);
devlink_register(devlink);
- devlink_reload_enable(devlink);
}
-
return 0;
err_driver_init:
@@ -2076,10 +2074,9 @@ void mlxsw_core_bus_device_unregister(st
{
struct devlink *devlink = priv_to_devlink(mlxsw_core);
- if (!reload) {
- devlink_reload_disable(devlink);
+ if (!reload)
devlink_unregister(devlink);
- }
+
if (devlink_is_reload_failed(devlink)) {
if (!reload)
/* Only the parts that were not de-initialized in the
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -1513,7 +1513,6 @@ int nsim_dev_probe(struct nsim_bus_dev *
nsim_dev->esw_mode = DEVLINK_ESWITCH_MODE_LEGACY;
devlink_set_features(devlink, DEVLINK_F_RELOAD);
devlink_register(devlink);
- devlink_reload_enable(devlink);
return 0;
err_psample_exit:
@@ -1567,9 +1566,7 @@ void nsim_dev_remove(struct nsim_bus_dev
struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
struct devlink *devlink = priv_to_devlink(nsim_dev);
- devlink_reload_disable(devlink);
devlink_unregister(devlink);
-
nsim_dev_reload_destroy(nsim_dev);
nsim_bpf_dev_exit(nsim_dev);
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1511,8 +1511,6 @@ static inline struct devlink *devlink_al
void devlink_set_features(struct devlink *devlink, u64 features);
void devlink_register(struct devlink *devlink);
void devlink_unregister(struct devlink *devlink);
-void devlink_reload_enable(struct devlink *devlink);
-void devlink_reload_disable(struct devlink *devlink);
void devlink_free(struct devlink *devlink);
int devlink_port_register(struct devlink *devlink,
struct devlink_port *devlink_port,
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -63,8 +63,7 @@ struct devlink {
* port, sb, dpipe, resource, params, region, traps and more.
*/
struct mutex lock;
- u8 reload_failed:1,
- reload_enabled:1;
+ u8 reload_failed:1;
refcount_t refcount;
struct completion comp;
char priv[0] __aligned(NETDEV_ALIGN);
@@ -4033,9 +4032,6 @@ static int devlink_reload(struct devlink
struct net *curr_net;
int err;
- if (!devlink->reload_enabled || !(devlink->features & DEVLINK_F_RELOAD))
- return -EOPNOTSUPP;
-
memcpy(remote_reload_stats, devlink->stats.remote_reload_stats,
sizeof(remote_reload_stats));
@@ -4103,7 +4099,7 @@ static int devlink_nl_cmd_reload(struct
u32 actions_performed;
int err;
- if (!devlink_reload_supported(devlink->ops))
+ if (!(devlink->features & DEVLINK_F_RELOAD))
return -EOPNOTSUPP;
err = devlink_resources_validate(devlink, NULL, info);
@@ -9175,8 +9171,6 @@ void devlink_unregister(struct devlink *
wait_for_completion(&devlink->comp);
mutex_lock(&devlink_mutex);
- WARN_ON(devlink->features & DEVLINK_F_RELOAD &&
- devlink->reload_enabled);
devlink_notify_unregister(devlink);
xa_clear_mark(&devlinks, devlink->index, DEVLINK_REGISTERED);
mutex_unlock(&devlink_mutex);
@@ -9184,41 +9178,6 @@ void devlink_unregister(struct devlink *
EXPORT_SYMBOL_GPL(devlink_unregister);
/**
- * devlink_reload_enable - Enable reload of devlink instance
- *
- * @devlink: devlink
- *
- * Should be called at end of device initialization
- * process when reload operation is supported.
- */
-void devlink_reload_enable(struct devlink *devlink)
-{
- mutex_lock(&devlink_mutex);
- devlink->reload_enabled = true;
- mutex_unlock(&devlink_mutex);
-}
-EXPORT_SYMBOL_GPL(devlink_reload_enable);
-
-/**
- * devlink_reload_disable - Disable reload of devlink instance
- *
- * @devlink: devlink
- *
- * Should be called at the beginning of device cleanup
- * process when reload operation is supported.
- */
-void devlink_reload_disable(struct devlink *devlink)
-{
- mutex_lock(&devlink_mutex);
- /* Mutex is taken which ensures that no reload operation is in
- * progress while setting up forbidded flag.
- */
- devlink->reload_enabled = false;
- mutex_unlock(&devlink_mutex);
-}
-EXPORT_SYMBOL_GPL(devlink_reload_disable);
-
-/**
* devlink_free - Free devlink instance resources
*
* @devlink: devlink
@@ -11554,7 +11513,7 @@ static void __net_exit devlink_pernet_pr
if (!net_eq(devlink_net(devlink), net))
goto retry;
- WARN_ON(!devlink_reload_supported(devlink->ops));
+ WARN_ON(!(devlink->features & DEVLINK_F_RELOAD));
err = devlink_reload(devlink, &init_net,
DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
DEVLINK_RELOAD_LIMIT_UNSPEC,