From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=ZICwACNBLinWfOFo5BNxpXhARueQcYuojmKLKdZqLXk=; b=vZkCtsImSgiN4o2HP1QzeuDHH+LL/rES9XF7h1lhY705gSIhaJLRYD75GEzs7Yb1HK P/p2T61weQX35jAf32/fOvmP6km3GfU/0shiuZbfjodssmQX5gjxrThMUwSEuDNhejOl 5a+9ipzltAgBwiC1i0V1OB6pkqjEAOMZpfMvSjgKJtEh7zaX0ub1JkYefbUQaKYTbzBS qbtdcFFgjSLA8TjIwCQndk1UbLdnptiZeuQZbKitRUDxxdMlQ+R0SEG/BK/LvsKgtc8U lcwOPENTFoQoXI43h4hA2a+VoOtUDX1hu+bJP1MKRFY/Dfbt2WyUcDMH9b8SkzIj7rj+ hg4g== From: Florian Fainelli Date: Tue, 26 Feb 2019 17:14:20 -0800 Message-Id: <20190227011427.16487-2-f.fainelli@gmail.com> In-Reply-To: <20190227011427.16487-1-f.fainelli@gmail.com> References: <20190227011427.16487-1-f.fainelli@gmail.com> Subject: [Bridge] [PATCH net-next v2 1/8] switchdev: Add SWITCHDEV_PORT_ATTR_SET List-Id: Linux Ethernet Bridging List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: netdev@vger.kernel.org Cc: "open list:STAGING SUBSYSTEM" , andrew@lunn.ch, Florian Fainelli , "moderated list:ETHERNET BRIDGE" , open list , vivien.didelot@gmail.com, Ido Schimmel , jiri@mellanox.com, "David S. Miller" In preparation for allowing switchdev enabled drivers to veto specific attribute settings from within the context of the caller, introduce a new switchdev notifier type for port attributes. Suggested-by: Ido Schimmel Signed-off-by: Florian Fainelli --- include/net/switchdev.h | 27 +++++++++++++++++++++ net/switchdev/switchdev.c | 51 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 78 insertions(+) diff --git a/include/net/switchdev.h b/include/net/switchdev.h index be4b13e66668..5087c06ceb4b 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -132,6 +132,7 @@ enum switchdev_notifier_type { SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */ SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */ + SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */ SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE, SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE, @@ -160,6 +161,13 @@ struct switchdev_notifier_port_obj_info { bool handled; }; +struct switchdev_notifier_port_attr_info { + struct switchdev_notifier_info info; /* must be first */ + const struct switchdev_attr *attr; + struct switchdev_trans *trans; + bool handled; +}; + static inline struct net_device * switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info) { @@ -212,7 +220,15 @@ int switchdev_handle_port_obj_del(struct net_device *dev, int (*del_cb)(struct net_device *dev, const struct switchdev_obj *obj)); +int switchdev_handle_port_attr_set(struct net_device *dev, + struct switchdev_notifier_port_attr_info *port_attr_info, + bool (*check_cb)(const struct net_device *dev), + int (*set_cb)(struct net_device *dev, + const struct switchdev_attr *attr, + struct switchdev_trans *trans)); + #define SWITCHDEV_SET_OPS(netdev, ops) ((netdev)->switchdev_ops = (ops)) + #else static inline void switchdev_deferred_process(void) @@ -299,6 +315,17 @@ switchdev_handle_port_obj_del(struct net_device *dev, return 0; } +static inline int +switchdev_handle_port_attr_set(struct net_device *dev, + struct switchdev_notifier_port_attr_info *port_attr_info, + bool (*check_cb)(const struct net_device *dev), + int (*set_cb)(struct net_device *dev, + const struct switchdev_attr *attr, + struct switchdev_trans *trans)) +{ + return 0; +} + #define SWITCHDEV_SET_OPS(netdev, ops) do {} while (0) #endif diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 362413c9b389..3560c19aa7e2 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -655,3 +655,54 @@ int switchdev_handle_port_obj_del(struct net_device *dev, return err; } EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del); + +static int __switchdev_handle_port_attr_set(struct net_device *dev, + struct switchdev_notifier_port_attr_info *port_attr_info, + bool (*check_cb)(const struct net_device *dev), + int (*set_cb)(struct net_device *dev, + const struct switchdev_attr *attr, + struct switchdev_trans *trans)) +{ + struct net_device *lower_dev; + struct list_head *iter; + int err = -EOPNOTSUPP; + + if (check_cb(dev)) { + port_attr_info->handled = true; + return set_cb(dev, port_attr_info->attr, + port_attr_info->trans); + } + + /* Switch ports might be stacked under e.g. a LAG. Ignore the + * unsupported devices, another driver might be able to handle them. But + * propagate to the callers any hard errors. + * + * If the driver does its own bookkeeping of stacked ports, it's not + * necessary to go through this helper. + */ + netdev_for_each_lower_dev(dev, lower_dev, iter) { + err = __switchdev_handle_port_attr_set(lower_dev, port_attr_info, + check_cb, set_cb); + if (err && err != -EOPNOTSUPP) + return err; + } + + return err; +} + +int switchdev_handle_port_attr_set(struct net_device *dev, + struct switchdev_notifier_port_attr_info *port_attr_info, + bool (*check_cb)(const struct net_device *dev), + int (*set_cb)(struct net_device *dev, + const struct switchdev_attr *attr, + struct switchdev_trans *trans)) +{ + int err; + + err = __switchdev_handle_port_attr_set(dev, port_attr_info, check_cb, + set_cb); + if (err == -EOPNOTSUPP) + err = 0; + return err; +} +EXPORT_SYMBOL_GPL(switchdev_handle_port_attr_set); -- 2.17.1