From cf530217408e3686f7002429769ede59dd931151 Mon Sep 17 00:00:00 2001 From: Leon Romanovsky Date: Sat, 25 Sep 2021 14:22:41 +0300 Subject: [PATCH] devlink: Notify users when objects are accessible The devlink core code notified users about add/remove objects without relation if this object can be accessible or not. In this patch we unify such user visible notifications in one place. Signed-off-by: Leon Romanovsky Signed-off-by: David S. Miller --- net/core/devlink.c | 107 ++++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 93 insertions(+), 14 deletions(-) diff --git a/net/core/devlink.c b/net/core/devlink.c index 3ea33c6..06edb2f 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -742,6 +742,7 @@ static void devlink_notify(struct devlink *devlink, enum devlink_command cmd) int err; WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL); + WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)); msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) @@ -1040,11 +1041,15 @@ nla_put_failure: static void devlink_port_notify(struct devlink_port *devlink_port, enum devlink_command cmd) { + struct devlink *devlink = devlink_port->devlink; struct sk_buff *msg; int err; WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL); + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return; @@ -1055,18 +1060,19 @@ static void devlink_port_notify(struct devlink_port *devlink_port, return; } - genlmsg_multicast_netns(&devlink_nl_family, - devlink_net(devlink_port->devlink), msg, 0, - DEVLINK_MCGRP_CONFIG, GFP_KERNEL); + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg, + 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); } static void devlink_rate_notify(struct devlink_rate *devlink_rate, enum devlink_command cmd) { + struct devlink *devlink = devlink_rate->devlink; struct sk_buff *msg; int err; WARN_ON(cmd != DEVLINK_CMD_RATE_NEW && cmd != DEVLINK_CMD_RATE_DEL); + WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)); msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) @@ -1078,9 +1084,8 @@ static void devlink_rate_notify(struct devlink_rate *devlink_rate, return; } - genlmsg_multicast_netns(&devlink_nl_family, - devlink_net(devlink_rate->devlink), msg, 0, - DEVLINK_MCGRP_CONFIG, GFP_KERNEL); + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg, + 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); } static int devlink_nl_cmd_rate_get_dumpit(struct sk_buff *msg, @@ -4150,6 +4155,7 @@ static void __devlink_flash_update_notify(struct devlink *devlink, WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE && cmd != DEVLINK_CMD_FLASH_UPDATE_END && cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS); + WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)); msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) @@ -5145,17 +5151,18 @@ static void devlink_nl_region_notify(struct devlink_region *region, struct devlink_snapshot *snapshot, enum devlink_command cmd) { + struct devlink *devlink = region->devlink; struct sk_buff *msg; WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL); + WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)); msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0); if (IS_ERR(msg)) return; - genlmsg_multicast_netns(&devlink_nl_family, - devlink_net(region->devlink), msg, 0, - DEVLINK_MCGRP_CONFIG, GFP_KERNEL); + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg, + 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); } /** @@ -6920,10 +6927,12 @@ genlmsg_cancel: static void devlink_recover_notify(struct devlink_health_reporter *reporter, enum devlink_command cmd) { + struct devlink *devlink = reporter->devlink; struct sk_buff *msg; int err; WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER); + WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)); msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) @@ -6935,9 +6944,8 @@ static void devlink_recover_notify(struct devlink_health_reporter *reporter, return; } - genlmsg_multicast_netns(&devlink_nl_family, - devlink_net(reporter->devlink), - msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg, + 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); } void @@ -8955,6 +8963,68 @@ struct devlink *devlink_alloc_ns(const struct devlink_ops *ops, } EXPORT_SYMBOL_GPL(devlink_alloc_ns); +static void +devlink_trap_policer_notify(struct devlink *devlink, + const struct devlink_trap_policer_item *policer_item, + enum devlink_command cmd); +static void +devlink_trap_group_notify(struct devlink *devlink, + const struct devlink_trap_group_item *group_item, + enum devlink_command cmd); +static void devlink_trap_notify(struct devlink *devlink, + const struct devlink_trap_item *trap_item, + enum devlink_command cmd); + +static void devlink_notify_register(struct devlink *devlink) +{ + struct devlink_trap_policer_item *policer_item; + struct devlink_trap_group_item *group_item; + struct devlink_trap_item *trap_item; + struct devlink_port *devlink_port; + + devlink_notify(devlink, DEVLINK_CMD_NEW); + list_for_each_entry(devlink_port, &devlink->port_list, list) + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); + + list_for_each_entry(policer_item, &devlink->trap_policer_list, list) + devlink_trap_policer_notify(devlink, policer_item, + DEVLINK_CMD_TRAP_POLICER_NEW); + + list_for_each_entry(group_item, &devlink->trap_group_list, list) + devlink_trap_group_notify(devlink, group_item, + DEVLINK_CMD_TRAP_GROUP_NEW); + + list_for_each_entry(trap_item, &devlink->trap_list, list) + devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW); + + devlink_params_publish(devlink); +} + +static void devlink_notify_unregister(struct devlink *devlink) +{ + struct devlink_trap_policer_item *policer_item; + struct devlink_trap_group_item *group_item; + struct devlink_trap_item *trap_item; + struct devlink_port *devlink_port; + + devlink_params_unpublish(devlink); + + list_for_each_entry_reverse(trap_item, &devlink->trap_list, list) + devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL); + + list_for_each_entry_reverse(group_item, &devlink->trap_group_list, list) + devlink_trap_group_notify(devlink, group_item, + DEVLINK_CMD_TRAP_GROUP_DEL); + list_for_each_entry_reverse(policer_item, &devlink->trap_policer_list, + list) + devlink_trap_policer_notify(devlink, policer_item, + DEVLINK_CMD_TRAP_POLICER_DEL); + + list_for_each_entry_reverse(devlink_port, &devlink->port_list, list) + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); + devlink_notify(devlink, DEVLINK_CMD_DEL); +} + /** * devlink_register - Register devlink instance * @@ -8964,7 +9034,7 @@ void devlink_register(struct devlink *devlink) { mutex_lock(&devlink_mutex); xa_set_mark(&devlinks, devlink->index, DEVLINK_REGISTERED); - devlink_notify(devlink, DEVLINK_CMD_NEW); + devlink_notify_register(devlink); mutex_unlock(&devlink_mutex); } EXPORT_SYMBOL_GPL(devlink_register); @@ -8982,7 +9052,7 @@ void devlink_unregister(struct devlink *devlink) mutex_lock(&devlink_mutex); WARN_ON(devlink_reload_supported(devlink->ops) && devlink->reload_enabled); - devlink_notify(devlink, DEVLINK_CMD_DEL); + devlink_notify_unregister(devlink); xa_clear_mark(&devlinks, devlink->index, DEVLINK_REGISTERED); mutex_unlock(&devlink_mutex); } @@ -10086,6 +10156,9 @@ void devlink_params_publish(struct devlink *devlink) { struct devlink_param_item *param_item; + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; + list_for_each_entry(param_item, &devlink->param_list, list) { if (param_item->published) continue; @@ -10631,6 +10704,8 @@ devlink_trap_group_notify(struct devlink *devlink, WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW && cmd != DEVLINK_CMD_TRAP_GROUP_DEL); + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) @@ -10672,6 +10747,8 @@ static void devlink_trap_notify(struct devlink *devlink, WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW && cmd != DEVLINK_CMD_TRAP_DEL); + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) @@ -11053,6 +11130,8 @@ devlink_trap_policer_notify(struct devlink *devlink, WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW && cmd != DEVLINK_CMD_TRAP_POLICER_DEL); + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) -- 2.7.4