From 6685987c29582afc79b7fa3998dfbf36b4295791 Mon Sep 17 00:00:00 2001 From: Petr Machata Date: Wed, 16 Jan 2019 23:06:56 +0000 Subject: switchdev: Add extack argument to call_switchdev_notifiers() A follow-up patch will enable vetoing of FDB entries. Make it possible to communicate details of why an FDB entry is not acceptable back to the user. Signed-off-by: Petr Machata Signed-off-by: David S. Miller --- net/switchdev/switchdev.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'net/switchdev/switchdev.c') diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 5df9d1138ac9..cd78253de31d 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -556,10 +556,11 @@ EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); * Call all network notifier blocks. */ int call_switchdev_notifiers(unsigned long val, struct net_device *dev, - struct switchdev_notifier_info *info) + struct switchdev_notifier_info *info, + struct netlink_ext_ack *extack) { info->dev = dev; - info->extack = NULL; + info->extack = extack; return atomic_notifier_call_chain(&switchdev_notif_chain, val, info); } EXPORT_SYMBOL_GPL(call_switchdev_notifiers); -- cgit v1.2.3 From bccb30254a4a02ee370dd23b2afbd25d7a78bc34 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Wed, 6 Feb 2019 09:45:46 -0800 Subject: net: Get rid of SWITCHDEV_ATTR_ID_PORT_PARENT_ID Now that we have a dedicated NDO for getting a port's parent ID, get rid of SWITCHDEV_ATTR_ID_PORT_PARENT_ID and convert all callers to use the NDO exclusively. This is a preliminary change to getting rid of switchdev_ops eventually. Signed-off-by: Florian Fainelli Reviewed-by: Ido Schimmel Signed-off-by: David S. Miller --- include/net/switchdev.h | 11 ----------- net/bridge/br_switchdev.c | 14 +++----------- net/core/net-sysfs.c | 19 ++++--------------- net/core/rtnetlink.c | 16 +++------------- net/ipv4/ipmr.c | 19 +++++-------------- net/switchdev/switchdev.c | 20 -------------------- 6 files changed, 15 insertions(+), 84 deletions(-) (limited to 'net/switchdev/switchdev.c') diff --git a/include/net/switchdev.h b/include/net/switchdev.h index 63843ae5dc81..5e87b54c5dc5 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -43,7 +43,6 @@ static inline bool switchdev_trans_ph_commit(struct switchdev_trans *trans) enum switchdev_attr_id { SWITCHDEV_ATTR_ID_UNDEFINED, - SWITCHDEV_ATTR_ID_PORT_PARENT_ID, SWITCHDEV_ATTR_ID_PORT_STP_STATE, SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS, SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT, @@ -61,7 +60,6 @@ struct switchdev_attr { void *complete_priv; void (*complete)(struct net_device *dev, int err, void *priv); union { - struct netdev_phys_item_id ppid; /* PORT_PARENT_ID */ u8 stp_state; /* PORT_STP_STATE */ unsigned long brport_flags; /* PORT_BRIDGE_FLAGS */ unsigned long brport_flags_support; /* PORT_BRIDGE_FLAGS_SUPPORT */ @@ -208,9 +206,6 @@ void switchdev_port_fwd_mark_set(struct net_device *dev, struct net_device *group_dev, bool joining); -bool switchdev_port_same_parent_id(struct net_device *a, - struct net_device *b); - int switchdev_handle_port_obj_add(struct net_device *dev, struct switchdev_notifier_port_obj_info *port_obj_info, bool (*check_cb)(const struct net_device *dev), @@ -295,12 +290,6 @@ call_switchdev_blocking_notifiers(unsigned long val, return NOTIFY_DONE; } -static inline bool switchdev_port_same_parent_id(struct net_device *a, - struct net_device *b) -{ - return false; -} - static inline int switchdev_handle_port_obj_add(struct net_device *dev, struct switchdev_notifier_port_obj_info *port_obj_info, diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c index 06b0ae44585f..db9e8ab96d48 100644 --- a/net/bridge/br_switchdev.c +++ b/net/bridge/br_switchdev.c @@ -14,8 +14,7 @@ static int br_switchdev_mark_get(struct net_bridge *br, struct net_device *dev) /* dev is yet to be added to the port list. */ list_for_each_entry(p, &br->port_list, list) { - if (netdev_port_same_parent_id(dev, p->dev) || - switchdev_port_same_parent_id(dev, p->dev)) + if (netdev_port_same_parent_id(dev, p->dev)) return p->offload_fwd_mark; } @@ -24,19 +23,12 @@ static int br_switchdev_mark_get(struct net_bridge *br, struct net_device *dev) int nbp_switchdev_mark_set(struct net_bridge_port *p) { - const struct net_device_ops *ops = p->dev->netdev_ops; - struct switchdev_attr attr = { - .orig_dev = p->dev, - .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, - }; + struct netdev_phys_item_id ppid = { }; int err; ASSERT_RTNL(); - if (ops->ndo_get_port_parent_id) - err = dev_get_port_parent_id(p->dev, &attr.u.ppid, true); - else - err = switchdev_port_attr_get(p->dev, &attr); + err = dev_get_port_parent_id(p->dev, &ppid, true); if (err) { if (err == -EOPNOTSUPP) return 0; diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 4eace9f1dcf9..7c5061123ead 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -12,7 +12,6 @@ #include #include #include -#include #include #include #include @@ -495,27 +494,17 @@ static ssize_t phys_switch_id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct net_device *netdev = to_net_dev(dev); - const struct net_device_ops *ops = netdev->netdev_ops; ssize_t ret = -EINVAL; if (!rtnl_trylock()) return restart_syscall(); if (dev_isalive(netdev)) { - struct switchdev_attr attr = { - .orig_dev = netdev, - .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, - .flags = SWITCHDEV_F_NO_RECURSE, - }; - - if (ops->ndo_get_port_parent_id) - ret = dev_get_port_parent_id(netdev, &attr.u.ppid, - false); - else - ret = switchdev_port_attr_get(netdev, &attr); + struct netdev_phys_item_id ppid = { }; + + ret = dev_get_port_parent_id(netdev, &ppid, false); if (!ret) - ret = sprintf(buf, "%*phN\n", attr.u.ppid.id_len, - attr.u.ppid.id); + ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); } rtnl_unlock(); diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 90dd02c1f561..a51cab95ba64 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -46,7 +46,6 @@ #include #include -#include #include #include #include @@ -1146,26 +1145,17 @@ static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) { - const struct net_device_ops *ops = dev->netdev_ops; + struct netdev_phys_item_id ppid = { }; int err; - struct switchdev_attr attr = { - .orig_dev = dev, - .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, - .flags = SWITCHDEV_F_NO_RECURSE, - }; - if (ops->ndo_get_port_parent_id) - err = dev_get_port_parent_id(dev, &attr.u.ppid, false); - else - err = switchdev_port_attr_get(dev, &attr); + err = dev_get_port_parent_id(dev, &ppid, false); if (err) { if (err == -EOPNOTSUPP) return 0; return err; } - if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, - attr.u.ppid.id)) + if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id)) return -EMSGSIZE; return 0; diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index c71bcc42d66d..e536970557dd 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -67,7 +67,6 @@ #include #include #include -#include #include @@ -837,11 +836,8 @@ static void ipmr_update_thresholds(struct mr_table *mrt, struct mr_mfc *cache, static int vif_add(struct net *net, struct mr_table *mrt, struct vifctl *vifc, int mrtsock) { - const struct net_device_ops *ops; + struct netdev_phys_item_id ppid = { }; int vifi = vifc->vifc_vifi; - struct switchdev_attr attr = { - .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, - }; struct vif_device *v = &mrt->vif_table[vifi]; struct net_device *dev; struct in_device *in_dev; @@ -920,15 +916,10 @@ static int vif_add(struct net *net, struct mr_table *mrt, vifc->vifc_flags | (!mrtsock ? VIFF_STATIC : 0), (VIFF_TUNNEL | VIFF_REGISTER)); - attr.orig_dev = dev; - ops = dev->netdev_ops; - if (ops->ndo_get_port_parent_id && - !dev_get_port_parent_id(dev, &attr.u.ppid, true)) { - memcpy(v->dev_parent_id.id, attr.u.ppid.id, attr.u.ppid.id_len); - v->dev_parent_id.id_len = attr.u.ppid.id_len; - } else if (!switchdev_port_attr_get(dev, &attr)) { - memcpy(v->dev_parent_id.id, attr.u.ppid.id, attr.u.ppid.id_len); - v->dev_parent_id.id_len = attr.u.ppid.id_len; + err = dev_get_port_parent_id(dev, &ppid, true); + if (err == 0) { + memcpy(v->dev_parent_id.id, ppid.id, ppid.id_len); + v->dev_parent_id.id_len = ppid.id_len; } else { v->dev_parent_id.id_len = 0; } diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index cd78253de31d..7e1357db33d7 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -592,26 +592,6 @@ int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev, } EXPORT_SYMBOL_GPL(call_switchdev_blocking_notifiers); -bool switchdev_port_same_parent_id(struct net_device *a, - struct net_device *b) -{ - struct switchdev_attr a_attr = { - .orig_dev = a, - .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, - }; - struct switchdev_attr b_attr = { - .orig_dev = b, - .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, - }; - - if (switchdev_port_attr_get(a, &a_attr) || - switchdev_port_attr_get(b, &b_attr)) - return false; - - return netdev_phys_item_id_same(&a_attr.u.ppid, &b_attr.u.ppid); -} -EXPORT_SYMBOL_GPL(switchdev_port_same_parent_id); - static int __switchdev_handle_port_obj_add(struct net_device *dev, struct switchdev_notifier_port_obj_info *port_obj_info, bool (*check_cb)(const struct net_device *dev), -- cgit v1.2.3 From 72636db5ba7bb0520bf39ea56dc87c90580ec6fd Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Sun, 24 Feb 2019 18:39:02 -0800 Subject: switchdev: Complete removal of switchdev_port_attr_get() We have no more in tree users of switchdev_port_attr_get() after d0e698d57a94 ("Merge branch 'net-Get-rid-of-switchdev_port_attr_get'") so completely remove the function signature and body. Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- include/net/switchdev.h | 4 ---- net/switchdev/switchdev.c | 42 ------------------------------------------ 2 files changed, 46 deletions(-) (limited to 'net/switchdev/switchdev.c') diff --git a/include/net/switchdev.h b/include/net/switchdev.h index 45310ddf2d7e..be4b13e66668 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -115,13 +115,9 @@ typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj); /** * struct switchdev_ops - switchdev operations * - * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr). - * * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr). */ struct switchdev_ops { - int (*switchdev_port_attr_get)(struct net_device *dev, - struct switchdev_attr *attr); int (*switchdev_port_attr_set)(struct net_device *dev, const struct switchdev_attr *attr, struct switchdev_trans *trans); diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 7e1357db33d7..362413c9b389 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -174,48 +174,6 @@ static int switchdev_deferred_enqueue(struct net_device *dev, return 0; } -/** - * switchdev_port_attr_get - Get port attribute - * - * @dev: port device - * @attr: attribute to get - */ -int switchdev_port_attr_get(struct net_device *dev, struct switchdev_attr *attr) -{ - const struct switchdev_ops *ops = dev->switchdev_ops; - struct net_device *lower_dev; - struct list_head *iter; - struct switchdev_attr first = { - .id = SWITCHDEV_ATTR_ID_UNDEFINED - }; - int err = -EOPNOTSUPP; - - if (ops && ops->switchdev_port_attr_get) - return ops->switchdev_port_attr_get(dev, attr); - - if (attr->flags & SWITCHDEV_F_NO_RECURSE) - return err; - - /* Switch device port(s) may be stacked under - * bond/team/vlan dev, so recurse down to get attr on - * each port. Return -ENODATA if attr values don't - * compare across ports. - */ - - netdev_for_each_lower_dev(dev, lower_dev, iter) { - err = switchdev_port_attr_get(lower_dev, attr); - if (err) - break; - if (first.id == SWITCHDEV_ATTR_ID_UNDEFINED) - first = *attr; - else if (memcmp(&first, attr, sizeof(*attr))) - return -ENODATA; - } - - return err; -} -EXPORT_SYMBOL_GPL(switchdev_port_attr_get); - static int __switchdev_port_attr_set(struct net_device *dev, const struct switchdev_attr *attr, struct switchdev_trans *trans) -- cgit v1.2.3 From 1cb33af1f75099282a51c4cc0bcc0ad413730079 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Wed, 27 Feb 2019 11:44:25 -0800 Subject: switchdev: Add SWITCHDEV_PORT_ATTR_SET 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 Reviewed-by: Ido Schimmel Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- include/net/switchdev.h | 27 +++++++++++++++++++++++++ net/switchdev/switchdev.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 78 insertions(+) (limited to 'net/switchdev/switchdev.c') 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); -- cgit v1.2.3 From d45224d604c5ba6ac5f9d6fddbe1d058c81dee80 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Wed, 27 Feb 2019 11:44:31 -0800 Subject: net: switchdev: Replace port attr set SDO with a notification Drop switchdev_ops.switchdev_port_attr_set. Drop the uses of this field from all clients, which were migrated to use switchdev notification in the previous patches. Add a new function switchdev_port_attr_notify() that sends the switchdev notifications SWITCHDEV_PORT_ATTR_SET and calls the blocking (process) notifier chain. We have one odd case within net/bridge/br_switchdev.c with the SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS attribute identifier that requires executing from atomic context, we deal with that one specifically. Drop __switchdev_port_attr_set() and update switchdev_port_attr_set() likewise. Signed-off-by: Florian Fainelli Reviewed-by: Ido Schimmel Signed-off-by: David S. Miller --- net/bridge/br_switchdev.c | 8 ++++++- net/switchdev/switchdev.c | 53 +++++++++++++++++++++-------------------------- 2 files changed, 31 insertions(+), 30 deletions(-) (limited to 'net/switchdev/switchdev.c') diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c index af57c4a2b78a..921310d3cbae 100644 --- a/net/bridge/br_switchdev.c +++ b/net/bridge/br_switchdev.c @@ -67,12 +67,18 @@ int br_switchdev_set_port_flag(struct net_bridge_port *p, .id = SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS, .u.brport_flags = mask, }; + struct switchdev_notifier_port_attr_info info = { + .attr = &attr, + }; int err; if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD) return 0; - err = switchdev_port_attr_set(p->dev, &attr); + /* We run from atomic context here */ + err = call_switchdev_notifiers(SWITCHDEV_PORT_ATTR_SET, p->dev, + &info.info, NULL); + err = notifier_to_errno(err); if (err == -EOPNOTSUPP) return 0; diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 3560c19aa7e2..d81cfcee9ad9 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -174,39 +174,32 @@ static int switchdev_deferred_enqueue(struct net_device *dev, return 0; } -static int __switchdev_port_attr_set(struct net_device *dev, - const struct switchdev_attr *attr, - struct switchdev_trans *trans) +static int switchdev_port_attr_notify(enum switchdev_notifier_type nt, + struct net_device *dev, + const struct switchdev_attr *attr, + struct switchdev_trans *trans) { - const struct switchdev_ops *ops = dev->switchdev_ops; - struct net_device *lower_dev; - struct list_head *iter; - int err = -EOPNOTSUPP; - - if (ops && ops->switchdev_port_attr_set) { - err = ops->switchdev_port_attr_set(dev, attr, trans); - goto done; - } - - if (attr->flags & SWITCHDEV_F_NO_RECURSE) - goto done; + int err; + int rc; - /* Switch device port(s) may be stacked under - * bond/team/vlan dev, so recurse down to set attr on - * each port. - */ + struct switchdev_notifier_port_attr_info attr_info = { + .attr = attr, + .trans = trans, + .handled = false, + }; - netdev_for_each_lower_dev(dev, lower_dev, iter) { - err = __switchdev_port_attr_set(lower_dev, attr, trans); - if (err) - break; + rc = call_switchdev_blocking_notifiers(nt, dev, + &attr_info.info, NULL); + err = notifier_to_errno(rc); + if (err) { + WARN_ON(!attr_info.handled); + return err; } -done: - if (err == -EOPNOTSUPP && attr->flags & SWITCHDEV_F_SKIP_EOPNOTSUPP) - err = 0; + if (!attr_info.handled) + return -EOPNOTSUPP; - return err; + return 0; } static int switchdev_port_attr_set_now(struct net_device *dev, @@ -225,7 +218,8 @@ static int switchdev_port_attr_set_now(struct net_device *dev, */ trans.ph_prepare = true; - err = __switchdev_port_attr_set(dev, attr, &trans); + err = switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr, + &trans); if (err) { /* Prepare phase failed: abort the transaction. Any * resources reserved in the prepare phase are @@ -244,7 +238,8 @@ static int switchdev_port_attr_set_now(struct net_device *dev, */ trans.ph_prepare = false; - err = __switchdev_port_attr_set(dev, attr, &trans); + err = switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr, + &trans); WARN(err, "%s: Commit of attribute (id=%d) failed.\n", dev->name, attr->id); switchdev_trans_items_warn_destroy(dev, &trans); -- cgit v1.2.3 From 91cf8eceffc131d41f098351e1b290bdaab45ea7 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Wed, 27 Feb 2019 16:29:16 -0800 Subject: switchdev: Remove unused transaction item queue There are no more in tree users of the switchdev_trans_item_{dequeue,enqueue} or switchdev_trans_item structure in the kernel since commit 00fc0c51e35b ("rocker: Change world_ops API and implementation to be switchdev independant"). Remove this unused code and update the documentation accordingly since. Signed-off-by: Florian Fainelli Acked-by: Jiri Pirko Signed-off-by: David S. Miller --- Documentation/networking/switchdev.txt | 19 ------- include/net/switchdev.h | 12 ---- net/switchdev/switchdev.c | 100 +-------------------------------- 3 files changed, 2 insertions(+), 129 deletions(-) (limited to 'net/switchdev/switchdev.c') diff --git a/Documentation/networking/switchdev.txt b/Documentation/networking/switchdev.txt index 633dd1fd81b7..86174ce8cd13 100644 --- a/Documentation/networking/switchdev.txt +++ b/Documentation/networking/switchdev.txt @@ -371,22 +371,3 @@ The driver can monitor for updates to arp_tbl using the netevent notifier NETEVENT_NEIGH_UPDATE. The device can be programmed with resolved nexthops for the routes as arp_tbl updates. The driver implements ndo_neigh_destroy to know when arp_tbl neighbor entries are purged from the port. - -Transaction item queue -^^^^^^^^^^^^^^^^^^^^^^ - -For switchdev ops attr_set and obj_add, there is a 2 phase transaction model -used. First phase is to "prepare" anything needed, including various checks, -memory allocation, etc. The goal is to handle the stuff that is not unlikely -to fail here. The second phase is to "commit" the actual changes. - -Switchdev provides an infrastructure for sharing items (for example memory -allocations) between the two phases. - -The object created by a driver in "prepare" phase and it is queued up by: -switchdev_trans_item_enqueue() -During the "commit" phase, the driver gets the object by: -switchdev_trans_item_dequeue() - -If a transaction is aborted during "prepare" phase, switchdev code will handle -cleanup of the queued-up objects. diff --git a/include/net/switchdev.h b/include/net/switchdev.h index e4f751e19ecf..0ebd67ae7012 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -20,14 +20,7 @@ #define SWITCHDEV_F_SKIP_EOPNOTSUPP BIT(1) #define SWITCHDEV_F_DEFER BIT(2) -struct switchdev_trans_item { - struct list_head list; - void *data; - void (*destructor)(const void *data); -}; - struct switchdev_trans { - struct list_head item_list; bool ph_prepare; }; @@ -105,11 +98,6 @@ struct switchdev_obj_port_mdb { #define SWITCHDEV_OBJ_PORT_MDB(OBJ) \ container_of((OBJ), struct switchdev_obj_port_mdb, obj) -void switchdev_trans_item_enqueue(struct switchdev_trans *trans, - void *data, void (*destructor)(void const *), - struct switchdev_trans_item *tritem); -void *switchdev_trans_item_dequeue(struct switchdev_trans *trans); - typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj); enum switchdev_notifier_type { diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index d81cfcee9ad9..90ba4a1f0a6d 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -23,78 +23,6 @@ #include #include -/** - * switchdev_trans_item_enqueue - Enqueue data item to transaction queue - * - * @trans: transaction - * @data: pointer to data being queued - * @destructor: data destructor - * @tritem: transaction item being queued - * - * Enqeueue data item to transaction queue. tritem is typically placed in - * cointainter pointed at by data pointer. Destructor is called on - * transaction abort and after successful commit phase in case - * the caller did not dequeue the item before. - */ -void switchdev_trans_item_enqueue(struct switchdev_trans *trans, - void *data, void (*destructor)(void const *), - struct switchdev_trans_item *tritem) -{ - tritem->data = data; - tritem->destructor = destructor; - list_add_tail(&tritem->list, &trans->item_list); -} -EXPORT_SYMBOL_GPL(switchdev_trans_item_enqueue); - -static struct switchdev_trans_item * -__switchdev_trans_item_dequeue(struct switchdev_trans *trans) -{ - struct switchdev_trans_item *tritem; - - if (list_empty(&trans->item_list)) - return NULL; - tritem = list_first_entry(&trans->item_list, - struct switchdev_trans_item, list); - list_del(&tritem->list); - return tritem; -} - -/** - * switchdev_trans_item_dequeue - Dequeue data item from transaction queue - * - * @trans: transaction - */ -void *switchdev_trans_item_dequeue(struct switchdev_trans *trans) -{ - struct switchdev_trans_item *tritem; - - tritem = __switchdev_trans_item_dequeue(trans); - BUG_ON(!tritem); - return tritem->data; -} -EXPORT_SYMBOL_GPL(switchdev_trans_item_dequeue); - -static void switchdev_trans_init(struct switchdev_trans *trans) -{ - INIT_LIST_HEAD(&trans->item_list); -} - -static void switchdev_trans_items_destroy(struct switchdev_trans *trans) -{ - struct switchdev_trans_item *tritem; - - while ((tritem = __switchdev_trans_item_dequeue(trans))) - tritem->destructor(tritem->data); -} - -static void switchdev_trans_items_warn_destroy(struct net_device *dev, - struct switchdev_trans *trans) -{ - WARN(!list_empty(&trans->item_list), "%s: transaction item queue is not empty.\n", - dev->name); - switchdev_trans_items_destroy(trans); -} - static LIST_HEAD(deferred); static DEFINE_SPINLOCK(deferred_lock); @@ -208,8 +136,6 @@ static int switchdev_port_attr_set_now(struct net_device *dev, struct switchdev_trans trans; int err; - switchdev_trans_init(&trans); - /* Phase I: prepare for attr set. Driver/device should fail * here if there are going to be issues in the commit phase, * such as lack of resources or support. The driver/device @@ -220,17 +146,8 @@ static int switchdev_port_attr_set_now(struct net_device *dev, trans.ph_prepare = true; err = switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr, &trans); - if (err) { - /* Prepare phase failed: abort the transaction. Any - * resources reserved in the prepare phase are - * released. - */ - - if (err != -EOPNOTSUPP) - switchdev_trans_items_destroy(&trans); - + if (err) return err; - } /* Phase II: commit attr set. This cannot fail as a fault * of driver/device. If it does, it's a bug in the driver/device @@ -242,7 +159,6 @@ static int switchdev_port_attr_set_now(struct net_device *dev, &trans); WARN(err, "%s: Commit of attribute (id=%d) failed.\n", dev->name, attr->id); - switchdev_trans_items_warn_destroy(dev, &trans); return err; } @@ -341,8 +257,6 @@ static int switchdev_port_obj_add_now(struct net_device *dev, ASSERT_RTNL(); - switchdev_trans_init(&trans); - /* Phase I: prepare for obj add. Driver/device should fail * here if there are going to be issues in the commit phase, * such as lack of resources or support. The driver/device @@ -353,17 +267,8 @@ static int switchdev_port_obj_add_now(struct net_device *dev, trans.ph_prepare = true; err = switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD, dev, obj, &trans, extack); - if (err) { - /* Prepare phase failed: abort the transaction. Any - * resources reserved in the prepare phase are - * released. - */ - - if (err != -EOPNOTSUPP) - switchdev_trans_items_destroy(&trans); - + if (err) return err; - } /* Phase II: commit obj add. This cannot fail as a fault * of driver/device. If it does, it's a bug in the driver/device @@ -374,7 +279,6 @@ static int switchdev_port_obj_add_now(struct net_device *dev, err = switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD, dev, obj, &trans, extack); WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id); - switchdev_trans_items_warn_destroy(dev, &trans); return err; } -- cgit v1.2.3