diff options
| -rw-r--r-- | include/linux/if_vlan.h | 1 | ||||
| -rw-r--r-- | net/8021q/vlan.c | 76 | ||||
| -rw-r--r-- | net/8021q/vlan.h | 2 | ||||
| -rw-r--r-- | net/8021q/vlan_netlink.c | 7 |
4 files changed, 23 insertions, 63 deletions
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 07db4169463e..129fa876dbe4 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -82,6 +82,7 @@ extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *)); struct vlan_group { int real_dev_ifindex; /* The ifindex of the ethernet(like) device the vlan is attached to. */ + unsigned int nr_vlans; struct hlist_node hlist; /* linked list */ struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS]; struct rcu_head rcu; diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index ad34e4a0326a..ac7963854103 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -132,33 +132,17 @@ static void vlan_rcu_free(struct rcu_head *rcu) vlan_group_free(container_of(rcu, struct vlan_group, rcu)); } - -/* This returns 0 if everything went fine. - * It will return 1 if the group was killed as a result. - * A negative return indicates failure. - * - * The RTNL lock must be held. - */ -static int unregister_vlan_dev(struct net_device *real_dev, - unsigned short vlan_id) +void unregister_vlan_dev(struct net_device *dev) { - struct net_device *dev; - int real_dev_ifindex = real_dev->ifindex; + struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev); + struct net_device *real_dev = vlan->real_dev; struct vlan_group *grp; - unsigned int i; - int ret; - - if (vlan_id >= VLAN_VID_MASK) - return -EINVAL; + unsigned short vlan_id = vlan->vlan_id; ASSERT_RTNL(); - grp = __vlan_find_group(real_dev_ifindex); - if (!grp) - return -ENOENT; - dev = vlan_group_get_device(grp, vlan_id); - if (!dev) - return -ENOENT; + grp = __vlan_find_group(real_dev->ifindex); + BUG_ON(!grp); vlan_proc_rem_dev(dev); @@ -169,20 +153,12 @@ static int unregister_vlan_dev(struct net_device *real_dev, real_dev->vlan_rx_kill_vid(real_dev, vlan_id); vlan_group_set_device(grp, vlan_id, NULL); - synchronize_net(); + grp->nr_vlans--; - /* Caller unregisters (and if necessary, puts) VLAN device, but we - * get rid of the reference to real_dev here. - */ - dev_put(real_dev); + synchronize_net(); /* If the group is now empty, kill off the group. */ - ret = 0; - for (i = 0; i < VLAN_VID_MASK; i++) - if (vlan_group_get_device(grp, i)) - break; - - if (i == VLAN_VID_MASK) { + if (grp->nr_vlans == 0) { if (real_dev->features & NETIF_F_HW_VLAN_RX) real_dev->vlan_rx_register(real_dev, NULL); @@ -190,23 +166,12 @@ static int unregister_vlan_dev(struct net_device *real_dev, /* Free the group, after all cpu's are done. */ call_rcu(&grp->rcu, vlan_rcu_free); - ret = 1; } - return ret; -} - -int unregister_vlan_device(struct net_device *dev) -{ - int ret; + /* Get rid of the vlan's reference to real_dev */ + dev_put(real_dev); - ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, - VLAN_DEV_INFO(dev)->vlan_id); unregister_netdevice(dev); - - if (ret == 1) - ret = 0; - return ret; } static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) @@ -291,6 +256,8 @@ int register_vlan_dev(struct net_device *dev) * it into our local structure. */ vlan_group_set_device(grp, vlan_id, dev); + grp->nr_vlans++; + if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) real_dev->vlan_rx_register(real_dev, ngrp); if (real_dev->features & NETIF_F_HW_VLAN_FILTER) @@ -479,20 +446,16 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, case NETDEV_UNREGISTER: /* Delete all VLANs for this dev. */ for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { - int ret; - vlandev = vlan_group_get_device(grp, i); if (!vlandev) continue; - ret = unregister_vlan_dev(dev, - VLAN_DEV_INFO(vlandev)->vlan_id); - - unregister_netdevice(vlandev); + /* unregistration of last vlan destroys group, abort + * afterwards */ + if (grp->nr_vlans == 1) + i = VLAN_GROUP_ARRAY_LEN; - /* Group was destroyed? */ - if (ret == 1) - break; + unregister_vlan_dev(vlandev); } break; } @@ -598,7 +561,8 @@ static int vlan_ioctl_handler(struct net *net, void __user *arg) err = -EPERM; if (!capable(CAP_NET_ADMIN)) break; - err = unregister_vlan_device(dev); + unregister_vlan_dev(dev); + err = 0; break; case GET_VLAN_REALDEV_NAME_CMD: diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h index 56378651cc46..0cfdf77b497c 100644 --- a/net/8021q/vlan.h +++ b/net/8021q/vlan.h @@ -38,7 +38,7 @@ void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result); int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id); void vlan_setup(struct net_device *dev); int register_vlan_dev(struct net_device *dev); -int unregister_vlan_device(struct net_device *dev); +void unregister_vlan_dev(struct net_device *dev); int vlan_netlink_init(void); void vlan_netlink_fini(void); diff --git a/net/8021q/vlan_netlink.c b/net/8021q/vlan_netlink.c index 0996185e2ed5..9ee63583ed27 100644 --- a/net/8021q/vlan_netlink.c +++ b/net/8021q/vlan_netlink.c @@ -137,11 +137,6 @@ static int vlan_newlink(struct net_device *dev, return register_vlan_dev(dev); } -static void vlan_dellink(struct net_device *dev) -{ - unregister_vlan_device(dev); -} - static inline size_t vlan_qos_map_size(unsigned int n) { if (n == 0) @@ -226,7 +221,7 @@ struct rtnl_link_ops vlan_link_ops __read_mostly = { .validate = vlan_validate, .newlink = vlan_newlink, .changelink = vlan_changelink, - .dellink = vlan_dellink, + .dellink = unregister_vlan_dev, .get_size = vlan_get_size, .fill_info = vlan_fill_info, }; |