^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * net/switchdev/switchdev.c - Switch device API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/if_bridge.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/if_vlan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <net/switchdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static LIST_HEAD(deferred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static DEFINE_SPINLOCK(deferred_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) typedef void switchdev_deferred_func_t(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) const void *data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct switchdev_deferred_item {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) switchdev_deferred_func_t *func;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) unsigned long data[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static struct switchdev_deferred_item *switchdev_deferred_dequeue(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct switchdev_deferred_item *dfitem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) spin_lock_bh(&deferred_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (list_empty(&deferred)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) dfitem = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) dfitem = list_first_entry(&deferred,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct switchdev_deferred_item, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) list_del(&dfitem->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) spin_unlock_bh(&deferred_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return dfitem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * switchdev_deferred_process - Process ops in deferred queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * Called to flush the ops currently queued in deferred ops queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * rtnl_lock must be held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) void switchdev_deferred_process(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct switchdev_deferred_item *dfitem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) while ((dfitem = switchdev_deferred_dequeue())) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) dfitem->func(dfitem->dev, dfitem->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) dev_put(dfitem->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) kfree(dfitem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) EXPORT_SYMBOL_GPL(switchdev_deferred_process);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static void switchdev_deferred_process_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) switchdev_deferred_process();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static DECLARE_WORK(deferred_process_work, switchdev_deferred_process_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static int switchdev_deferred_enqueue(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) const void *data, size_t data_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) switchdev_deferred_func_t *func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct switchdev_deferred_item *dfitem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) dfitem = kmalloc(sizeof(*dfitem) + data_len, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (!dfitem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) dfitem->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) dfitem->func = func;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) memcpy(dfitem->data, data, data_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) dev_hold(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) spin_lock_bh(&deferred_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) list_add_tail(&dfitem->list, &deferred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) spin_unlock_bh(&deferred_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) schedule_work(&deferred_process_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static int switchdev_port_attr_notify(enum switchdev_notifier_type nt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) const struct switchdev_attr *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct switchdev_trans *trans)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct switchdev_notifier_port_attr_info attr_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .attr = attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .trans = trans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .handled = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) rc = call_switchdev_blocking_notifiers(nt, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) &attr_info.info, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) err = notifier_to_errno(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) WARN_ON(!attr_info.handled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (!attr_info.handled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int switchdev_port_attr_set_now(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) const struct switchdev_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct switchdev_trans trans;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) /* Phase I: prepare for attr set. Driver/device should fail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * here if there are going to be issues in the commit phase,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * such as lack of resources or support. The driver/device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * should reserve resources needed for the commit phase here,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * but should not commit the attr.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) trans.ph_prepare = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) err = switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) &trans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /* Phase II: commit attr set. This cannot fail as a fault
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * of driver/device. If it does, it's a bug in the driver/device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * because the driver said everythings was OK in phase I.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) trans.ph_prepare = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) err = switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) &trans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) WARN(err, "%s: Commit of attribute (id=%d) failed.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) dev->name, attr->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static void switchdev_port_attr_set_deferred(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) const void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) const struct switchdev_attr *attr = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) err = switchdev_port_attr_set_now(dev, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (err && err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) netdev_err(dev, "failed (err=%d) to set attribute (id=%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) err, attr->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (attr->complete)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) attr->complete(dev, err, attr->complete_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int switchdev_port_attr_set_defer(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) const struct switchdev_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) return switchdev_deferred_enqueue(dev, attr, sizeof(*attr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) switchdev_port_attr_set_deferred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * switchdev_port_attr_set - Set port attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * @dev: port device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * @attr: attribute to set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * Use a 2-phase prepare-commit transaction model to ensure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * system is not left in a partially updated state due to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * failure from driver/device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * rtnl_lock must be held and must not be in atomic section,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * in case SWITCHDEV_F_DEFER flag is not set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) int switchdev_port_attr_set(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) const struct switchdev_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (attr->flags & SWITCHDEV_F_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return switchdev_port_attr_set_defer(dev, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) return switchdev_port_attr_set_now(dev, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) EXPORT_SYMBOL_GPL(switchdev_port_attr_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static size_t switchdev_obj_size(const struct switchdev_obj *obj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) switch (obj->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) case SWITCHDEV_OBJ_ID_PORT_VLAN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return sizeof(struct switchdev_obj_port_vlan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) case SWITCHDEV_OBJ_ID_PORT_MDB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) return sizeof(struct switchdev_obj_port_mdb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) case SWITCHDEV_OBJ_ID_HOST_MDB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return sizeof(struct switchdev_obj_port_mdb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) static int switchdev_port_obj_notify(enum switchdev_notifier_type nt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) const struct switchdev_obj *obj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) struct switchdev_trans *trans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) struct switchdev_notifier_port_obj_info obj_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) .obj = obj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) .trans = trans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) .handled = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) rc = call_switchdev_blocking_notifiers(nt, dev, &obj_info.info, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) err = notifier_to_errno(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) WARN_ON(!obj_info.handled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (!obj_info.handled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static int switchdev_port_obj_add_now(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) const struct switchdev_obj *obj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct switchdev_trans trans;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) /* Phase I: prepare for obj add. Driver/device should fail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * here if there are going to be issues in the commit phase,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) * such as lack of resources or support. The driver/device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * should reserve resources needed for the commit phase here,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) * but should not commit the obj.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) trans.ph_prepare = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) err = switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) dev, obj, &trans, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) /* Phase II: commit obj add. This cannot fail as a fault
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * of driver/device. If it does, it's a bug in the driver/device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * because the driver said everythings was OK in phase I.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) trans.ph_prepare = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) err = switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) dev, obj, &trans, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static void switchdev_port_obj_add_deferred(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) const void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) const struct switchdev_obj *obj = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) err = switchdev_port_obj_add_now(dev, obj, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (err && err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) netdev_err(dev, "failed (err=%d) to add object (id=%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) err, obj->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (obj->complete)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) obj->complete(dev, err, obj->complete_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static int switchdev_port_obj_add_defer(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) const struct switchdev_obj *obj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) switchdev_port_obj_add_deferred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * switchdev_port_obj_add - Add port object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * @dev: port device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * @obj: object to add
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * @extack: netlink extended ack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * Use a 2-phase prepare-commit transaction model to ensure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * system is not left in a partially updated state due to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) * failure from driver/device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) * rtnl_lock must be held and must not be in atomic section,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * in case SWITCHDEV_F_DEFER flag is not set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) int switchdev_port_obj_add(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) const struct switchdev_obj *obj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (obj->flags & SWITCHDEV_F_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return switchdev_port_obj_add_defer(dev, obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return switchdev_port_obj_add_now(dev, obj, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) EXPORT_SYMBOL_GPL(switchdev_port_obj_add);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) static int switchdev_port_obj_del_now(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) const struct switchdev_obj *obj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_DEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) dev, obj, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) static void switchdev_port_obj_del_deferred(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) const void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) const struct switchdev_obj *obj = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) err = switchdev_port_obj_del_now(dev, obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (err && err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) netdev_err(dev, "failed (err=%d) to del object (id=%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) err, obj->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (obj->complete)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) obj->complete(dev, err, obj->complete_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) static int switchdev_port_obj_del_defer(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) const struct switchdev_obj *obj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) switchdev_port_obj_del_deferred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * switchdev_port_obj_del - Delete port object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * @dev: port device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * @obj: object to delete
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * rtnl_lock must be held and must not be in atomic section,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) * in case SWITCHDEV_F_DEFER flag is not set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) int switchdev_port_obj_del(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) const struct switchdev_obj *obj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (obj->flags & SWITCHDEV_F_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return switchdev_port_obj_del_defer(dev, obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) return switchdev_port_obj_del_now(dev, obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) EXPORT_SYMBOL_GPL(switchdev_port_obj_del);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) static ATOMIC_NOTIFIER_HEAD(switchdev_notif_chain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) static BLOCKING_NOTIFIER_HEAD(switchdev_blocking_notif_chain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * register_switchdev_notifier - Register notifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * @nb: notifier_block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) * Register switch device notifier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) int register_switchdev_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) return atomic_notifier_chain_register(&switchdev_notif_chain, nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) EXPORT_SYMBOL_GPL(register_switchdev_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) * unregister_switchdev_notifier - Unregister notifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) * @nb: notifier_block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) * Unregister switch device notifier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) int unregister_switchdev_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return atomic_notifier_chain_unregister(&switchdev_notif_chain, nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) EXPORT_SYMBOL_GPL(unregister_switchdev_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) * call_switchdev_notifiers - Call notifiers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) * @val: value passed unmodified to notifier function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * @dev: port device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * @info: notifier information data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * @extack: netlink extended ack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * Call all network notifier blocks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct switchdev_notifier_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) info->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) info->extack = extack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) return atomic_notifier_call_chain(&switchdev_notif_chain, val, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) EXPORT_SYMBOL_GPL(call_switchdev_notifiers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) int register_switchdev_blocking_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) struct blocking_notifier_head *chain = &switchdev_blocking_notif_chain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) return blocking_notifier_chain_register(chain, nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) EXPORT_SYMBOL_GPL(register_switchdev_blocking_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) int unregister_switchdev_blocking_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) struct blocking_notifier_head *chain = &switchdev_blocking_notif_chain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) return blocking_notifier_chain_unregister(chain, nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) EXPORT_SYMBOL_GPL(unregister_switchdev_blocking_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) struct switchdev_notifier_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) info->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) info->extack = extack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) return blocking_notifier_call_chain(&switchdev_blocking_notif_chain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) val, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) EXPORT_SYMBOL_GPL(call_switchdev_blocking_notifiers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) static int __switchdev_handle_port_obj_add(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) struct switchdev_notifier_port_obj_info *port_obj_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) bool (*check_cb)(const struct net_device *dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) int (*add_cb)(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) const struct switchdev_obj *obj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) struct switchdev_trans *trans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct netlink_ext_ack *extack))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) struct netlink_ext_ack *extack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) struct net_device *lower_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) struct list_head *iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) int err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) extack = switchdev_notifier_info_to_extack(&port_obj_info->info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (check_cb(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) err = add_cb(dev, port_obj_info->obj, port_obj_info->trans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) port_obj_info->handled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /* Switch ports might be stacked under e.g. a LAG. Ignore the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * unsupported devices, another driver might be able to handle them. But
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) * propagate to the callers any hard errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * If the driver does its own bookkeeping of stacked ports, it's not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) * necessary to go through this helper.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) netdev_for_each_lower_dev(dev, lower_dev, iter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (netif_is_bridge_master(lower_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) err = __switchdev_handle_port_obj_add(lower_dev, port_obj_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) check_cb, add_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (err && err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) int switchdev_handle_port_obj_add(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) struct switchdev_notifier_port_obj_info *port_obj_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) bool (*check_cb)(const struct net_device *dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) int (*add_cb)(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) const struct switchdev_obj *obj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) struct switchdev_trans *trans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) struct netlink_ext_ack *extack))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) err = __switchdev_handle_port_obj_add(dev, port_obj_info, check_cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) add_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (err == -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_add);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) static int __switchdev_handle_port_obj_del(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) struct switchdev_notifier_port_obj_info *port_obj_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) bool (*check_cb)(const struct net_device *dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) int (*del_cb)(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) const struct switchdev_obj *obj))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) struct net_device *lower_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) struct list_head *iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) int err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (check_cb(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) err = del_cb(dev, port_obj_info->obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) if (err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) port_obj_info->handled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) /* Switch ports might be stacked under e.g. a LAG. Ignore the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) * unsupported devices, another driver might be able to handle them. But
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) * propagate to the callers any hard errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) * If the driver does its own bookkeeping of stacked ports, it's not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) * necessary to go through this helper.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) netdev_for_each_lower_dev(dev, lower_dev, iter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) if (netif_is_bridge_master(lower_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) err = __switchdev_handle_port_obj_del(lower_dev, port_obj_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) check_cb, del_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (err && err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) int switchdev_handle_port_obj_del(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) struct switchdev_notifier_port_obj_info *port_obj_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) bool (*check_cb)(const struct net_device *dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) int (*del_cb)(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) const struct switchdev_obj *obj))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) err = __switchdev_handle_port_obj_del(dev, port_obj_info, check_cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) del_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (err == -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) static int __switchdev_handle_port_attr_set(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) struct switchdev_notifier_port_attr_info *port_attr_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) bool (*check_cb)(const struct net_device *dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) int (*set_cb)(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) const struct switchdev_attr *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) struct switchdev_trans *trans))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) struct net_device *lower_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) struct list_head *iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) int err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (check_cb(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) err = set_cb(dev, port_attr_info->attr, port_attr_info->trans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) port_attr_info->handled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) /* Switch ports might be stacked under e.g. a LAG. Ignore the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * unsupported devices, another driver might be able to handle them. But
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) * propagate to the callers any hard errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) * If the driver does its own bookkeeping of stacked ports, it's not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) * necessary to go through this helper.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) netdev_for_each_lower_dev(dev, lower_dev, iter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (netif_is_bridge_master(lower_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) err = __switchdev_handle_port_attr_set(lower_dev, port_attr_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) check_cb, set_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) if (err && err != -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) int switchdev_handle_port_attr_set(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) struct switchdev_notifier_port_attr_info *port_attr_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) bool (*check_cb)(const struct net_device *dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) int (*set_cb)(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) const struct switchdev_attr *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) struct switchdev_trans *trans))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) err = __switchdev_handle_port_attr_set(dev, port_attr_info, check_cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) set_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (err == -EOPNOTSUPP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) EXPORT_SYMBOL_GPL(switchdev_handle_port_attr_set);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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