diff options
author | Leon Romanovsky <leonro@nvidia.com> | 2021-10-28 16:23:21 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2021-10-28 16:55:17 +0300 |
commit | ee775b56950faef934d6e9c2252de6e2e5a8e912 (patch) | |
tree | fe8f7684d5d5c96f6a34b04b6f594c2045861998 | |
parent | b0e77fcc5dfde8be9b8fc801da3ccc8015d7ff4e (diff) | |
download | linux-ee775b56950faef934d6e9c2252de6e2e5a8e912.tar.xz |
devlink: Simplify internal devlink params implementation
Reduce extra indirection from devlink_params_*() API. Such change
makes it clear that we can drop devlink->lock from these flows, because
everything is executed when the devlink is not registered yet.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | net/core/devlink.c | 169 |
1 files changed, 46 insertions, 123 deletions
diff --git a/net/core/devlink.c b/net/core/devlink.c index 0de679c4313c..ff2bc6a8f95e 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -4925,45 +4925,6 @@ static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb, info, DEVLINK_CMD_PARAM_NEW); } -static int devlink_param_register_one(struct devlink *devlink, - unsigned int port_index, - struct list_head *param_list, - const struct devlink_param *param, - enum devlink_command cmd) -{ - struct devlink_param_item *param_item; - - if (devlink_param_find_by_name(param_list, param->name)) - return -EEXIST; - - if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT)) - WARN_ON(param->get || param->set); - else - WARN_ON(!param->get || !param->set); - - param_item = kzalloc(sizeof(*param_item), GFP_KERNEL); - if (!param_item) - return -ENOMEM; - param_item->param = param; - - list_add_tail(¶m_item->list, param_list); - return 0; -} - -static void devlink_param_unregister_one(struct devlink *devlink, - unsigned int port_index, - struct list_head *param_list, - const struct devlink_param *param, - enum devlink_command cmd) -{ - struct devlink_param_item *param_item; - - param_item = devlink_param_find_by_name(param_list, param->name); - WARN_ON(!param_item); - list_del(¶m_item->list); - kfree(param_item); -} - static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg, struct netlink_callback *cb) { @@ -10092,73 +10053,6 @@ static int devlink_param_verify(const struct devlink_param *param) return devlink_param_driver_verify(param); } -static int __devlink_param_register_one(struct devlink *devlink, - unsigned int port_index, - struct list_head *param_list, - const struct devlink_param *param, - enum devlink_command reg_cmd) -{ - int err; - - err = devlink_param_verify(param); - if (err) - return err; - - return devlink_param_register_one(devlink, port_index, - param_list, param, reg_cmd); -} - -static int __devlink_params_register(struct devlink *devlink, - unsigned int port_index, - struct list_head *param_list, - const struct devlink_param *params, - size_t params_count, - enum devlink_command reg_cmd, - enum devlink_command unreg_cmd) -{ - const struct devlink_param *param = params; - int i; - int err; - - mutex_lock(&devlink->lock); - for (i = 0; i < params_count; i++, param++) { - err = __devlink_param_register_one(devlink, port_index, - param_list, param, reg_cmd); - if (err) - goto rollback; - } - - mutex_unlock(&devlink->lock); - return 0; - -rollback: - if (!i) - goto unlock; - for (param--; i > 0; i--, param--) - devlink_param_unregister_one(devlink, port_index, param_list, - param, unreg_cmd); -unlock: - mutex_unlock(&devlink->lock); - return err; -} - -static void __devlink_params_unregister(struct devlink *devlink, - unsigned int port_index, - struct list_head *param_list, - const struct devlink_param *params, - size_t params_count, - enum devlink_command cmd) -{ - const struct devlink_param *param = params; - int i; - - mutex_lock(&devlink->lock); - for (i = 0; i < params_count; i++, param++) - devlink_param_unregister_one(devlink, 0, param_list, param, - cmd); - mutex_unlock(&devlink->lock); -} - /** * devlink_params_register - register configuration parameters * @@ -10172,12 +10066,25 @@ int devlink_params_register(struct devlink *devlink, const struct devlink_param *params, size_t params_count) { + const struct devlink_param *param = params; + int i, err; + ASSERT_DEVLINK_NOT_REGISTERED(devlink); - return __devlink_params_register(devlink, 0, &devlink->param_list, - params, params_count, - DEVLINK_CMD_PARAM_NEW, - DEVLINK_CMD_PARAM_DEL); + for (i = 0; i < params_count; i++, param++) { + err = devlink_param_register(devlink, param); + if (err) + goto rollback; + } + return 0; + +rollback: + if (!i) + return err; + + for (param--; i > 0; i--, param--) + devlink_param_unregister(devlink, param); + return err; } EXPORT_SYMBOL_GPL(devlink_params_register); @@ -10191,11 +10098,13 @@ void devlink_params_unregister(struct devlink *devlink, const struct devlink_param *params, size_t params_count) { + const struct devlink_param *param = params; + int i; + ASSERT_DEVLINK_NOT_REGISTERED(devlink); - return __devlink_params_unregister(devlink, 0, &devlink->param_list, - params, params_count, - DEVLINK_CMD_PARAM_DEL); + for (i = 0; i < params_count; i++, param++) + devlink_param_unregister(devlink, param); } EXPORT_SYMBOL_GPL(devlink_params_unregister); @@ -10211,15 +10120,26 @@ EXPORT_SYMBOL_GPL(devlink_params_unregister); int devlink_param_register(struct devlink *devlink, const struct devlink_param *param) { - int err; + struct devlink_param_item *param_item; ASSERT_DEVLINK_NOT_REGISTERED(devlink); - mutex_lock(&devlink->lock); - err = __devlink_param_register_one(devlink, 0, &devlink->param_list, - param, DEVLINK_CMD_PARAM_NEW); - mutex_unlock(&devlink->lock); - return err; + WARN_ON(devlink_param_verify(param)); + WARN_ON(devlink_param_find_by_name(&devlink->param_list, param->name)); + + if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT)) + WARN_ON(param->get || param->set); + else + WARN_ON(!param->get || !param->set); + + param_item = kzalloc(sizeof(*param_item), GFP_KERNEL); + if (!param_item) + return -ENOMEM; + + param_item->param = param; + + list_add_tail(¶m_item->list, &devlink->param_list); + return 0; } EXPORT_SYMBOL_GPL(devlink_param_register); @@ -10231,12 +10151,15 @@ EXPORT_SYMBOL_GPL(devlink_param_register); void devlink_param_unregister(struct devlink *devlink, const struct devlink_param *param) { + struct devlink_param_item *param_item; + ASSERT_DEVLINK_NOT_REGISTERED(devlink); - mutex_lock(&devlink->lock); - devlink_param_unregister_one(devlink, 0, &devlink->param_list, param, - DEVLINK_CMD_PARAM_DEL); - mutex_unlock(&devlink->lock); + param_item = + devlink_param_find_by_name(&devlink->param_list, param->name); + WARN_ON(!param_item); + list_del(¶m_item->list); + kfree(param_item); } EXPORT_SYMBOL_GPL(devlink_param_unregister); |