diff options
Diffstat (limited to 'net/8021q')
| -rw-r--r-- | net/8021q/vlan.c | 93 | ||||
| -rw-r--r-- | net/8021q/vlan.h | 17 | ||||
| -rw-r--r-- | net/8021q/vlan_core.c | 121 | ||||
| -rw-r--r-- | net/8021q/vlan_dev.c | 10 |
4 files changed, 57 insertions, 184 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index a2ad152..05b867e 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -44,9 +44,6 @@ int vlan_net_id __read_mostly; -/* Our listing of VLAN group(s) */ -static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; - const char vlan_fullname[] = "802.1Q VLAN Support"; const char vlan_version[] = DRV_VERSION; static const char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; @@ -59,40 +56,6 @@ static struct packet_type vlan_packet_type __read_mostly = { /* End of global variables definitions. */ -static inline unsigned int vlan_grp_hashfn(unsigned int idx) -{ - return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK; -} - -/* Must be invoked with RCU read lock (no preempt) */ -static struct vlan_group *__vlan_find_group(struct net_device *real_dev) -{ - struct vlan_group *grp; - struct hlist_node *n; - int hash = vlan_grp_hashfn(real_dev->ifindex); - - hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { - if (grp->real_dev == real_dev) - return grp; - } - - return NULL; -} - -/* Find the protocol handler. Assumes VID < VLAN_VID_MASK. - * - * Must be invoked with RCU read lock (no preempt) - */ -struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id) -{ - struct vlan_group *grp = __vlan_find_group(real_dev); - - if (grp) - return vlan_group_get_device(grp, vlan_id); - - return NULL; -} - static void vlan_group_free(struct vlan_group *grp) { int i; @@ -111,8 +74,6 @@ static struct vlan_group *vlan_group_alloc(struct net_device *real_dev) return NULL; grp->real_dev = real_dev; - hlist_add_head_rcu(&grp->hlist, - &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); return grp; } @@ -151,7 +112,7 @@ void unregister_vlan_dev(struct net_device *dev, struct list_head *head) ASSERT_RTNL(); - grp = __vlan_find_group(real_dev); + grp = real_dev->vlgrp; BUG_ON(!grp); /* Take it out of our own structures, but be sure to interlock with @@ -173,11 +134,10 @@ void unregister_vlan_dev(struct net_device *dev, struct list_head *head) if (grp->nr_vlans == 0) { vlan_gvrp_uninit_applicant(real_dev); - if (real_dev->features & NETIF_F_HW_VLAN_RX) + rcu_assign_pointer(real_dev->vlgrp, NULL); + if (ops->ndo_vlan_rx_register) ops->ndo_vlan_rx_register(real_dev, NULL); - hlist_del_rcu(&grp->hlist); - /* Free the group, after all cpu's are done. */ call_rcu(&grp->rcu, vlan_rcu_free); } @@ -196,18 +156,13 @@ int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id) return -EOPNOTSUPP; } - if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !ops->ndo_vlan_rx_register) { - pr_info("8021q: device %s has buggy VLAN hw accel\n", name); - return -EOPNOTSUPP; - } - if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && (!ops->ndo_vlan_rx_add_vid || !ops->ndo_vlan_rx_kill_vid)) { pr_info("8021q: Device %s has buggy VLAN hw accel\n", name); return -EOPNOTSUPP; } - if (__find_vlan_dev(real_dev, vlan_id) != NULL) + if (vlan_find_dev(real_dev, vlan_id) != NULL) return -EEXIST; return 0; @@ -222,7 +177,7 @@ int register_vlan_dev(struct net_device *dev) struct vlan_group *grp, *ngrp = NULL; int err; - grp = __vlan_find_group(real_dev); + grp = real_dev->vlgrp; if (!grp) { ngrp = grp = vlan_group_alloc(real_dev); if (!grp) @@ -252,8 +207,11 @@ int register_vlan_dev(struct net_device *dev) vlan_group_set_device(grp, vlan_id, dev); grp->nr_vlans++; - if (ngrp && real_dev->features & NETIF_F_HW_VLAN_RX) - ops->ndo_vlan_rx_register(real_dev, ngrp); + if (ngrp) { + if (ops->ndo_vlan_rx_register) + ops->ndo_vlan_rx_register(real_dev, ngrp); + rcu_assign_pointer(real_dev->vlgrp, ngrp); + } if (real_dev->features & NETIF_F_HW_VLAN_FILTER) ops->ndo_vlan_rx_add_vid(real_dev, vlan_id); @@ -264,7 +222,6 @@ out_uninit_applicant: vlan_gvrp_uninit_applicant(real_dev); out_free_group: if (ngrp) { - hlist_del_rcu(&ngrp->hlist); /* Free the group, after all cpu's are done. */ call_rcu(&ngrp->rcu, vlan_rcu_free); } @@ -321,7 +278,7 @@ static int register_vlan_device(struct net_device *real_dev, u16 vlan_id) if (new_dev == NULL) return -ENOBUFS; - new_dev->real_num_tx_queues = real_dev->real_num_tx_queues; + netif_copy_real_num_queues(new_dev, real_dev); dev_net_set(new_dev, net); /* need 4 bytes for extra VLAN header info, * hope the underlying device can handle it. @@ -428,7 +385,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0); } - grp = __vlan_find_group(dev); + grp = dev->vlgrp; if (!grp) goto out; @@ -439,7 +396,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, switch (event) { case NETDEV_CHANGE: /* Propagate real device state to vlan devices */ - for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + for (i = 0; i < VLAN_N_VID; i++) { vlandev = vlan_group_get_device(grp, i); if (!vlandev) continue; @@ -450,7 +407,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, case NETDEV_CHANGEADDR: /* Adjust unicast filters on underlying device */ - for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + for (i = 0; i < VLAN_N_VID; i++) { vlandev = vlan_group_get_device(grp, i); if (!vlandev) continue; @@ -464,7 +421,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, break; case NETDEV_CHANGEMTU: - for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + for (i = 0; i < VLAN_N_VID; i++) { vlandev = vlan_group_get_device(grp, i); if (!vlandev) continue; @@ -478,7 +435,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, case NETDEV_FEAT_CHANGE: /* Propagate device features to underlying device */ - for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + for (i = 0; i < VLAN_N_VID; i++) { vlandev = vlan_group_get_device(grp, i); if (!vlandev) continue; @@ -490,7 +447,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, case NETDEV_DOWN: /* Put all VLANs for this dev in the down state too. */ - for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + for (i = 0; i < VLAN_N_VID; i++) { vlandev = vlan_group_get_device(grp, i); if (!vlandev) continue; @@ -508,7 +465,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, case NETDEV_UP: /* Put all VLANs for this dev in the up state too. */ - for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + for (i = 0; i < VLAN_N_VID; i++) { vlandev = vlan_group_get_device(grp, i); if (!vlandev) continue; @@ -525,10 +482,14 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, break; case NETDEV_UNREGISTER: + /* twiddle thumbs on netns device moves */ + if (dev->reg_state != NETREG_UNREGISTERING) + break; + /* Delete all VLANs for this dev. */ grp->killall = 1; - for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + for (i = 0; i < VLAN_N_VID; i++) { vlandev = vlan_group_get_device(grp, i); if (!vlandev) continue; @@ -536,7 +497,7 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event, /* unregistration of last vlan destroys group, abort * afterwards */ if (grp->nr_vlans == 1) - i = VLAN_GROUP_ARRAY_LEN; + i = VLAN_N_VID; unregister_vlan_dev(vlandev, &list); } @@ -742,8 +703,6 @@ err0: static void __exit vlan_cleanup_module(void) { - unsigned int i; - vlan_ioctl_set(NULL); vlan_netlink_fini(); @@ -751,10 +710,6 @@ static void __exit vlan_cleanup_module(void) dev_remove_pack(&vlan_packet_type); - /* This table must be empty if there are no module references left. */ - for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) - BUG_ON(!hlist_empty(&vlan_group_hash[i])); - unregister_pernet_subsys(&vlan_net_ops); rcu_barrier(); /* Wait for completion of call_rcu()'s */ diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h index 8d9503a..db01b31 100644 --- a/net/8021q/vlan.h +++ b/net/8021q/vlan.h @@ -72,23 +72,6 @@ static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev) return netdev_priv(dev); } -#define VLAN_GRP_HASH_SHIFT 5 -#define VLAN_GRP_HASH_SIZE (1 << VLAN_GRP_HASH_SHIFT) -#define VLAN_GRP_HASH_MASK (VLAN_GRP_HASH_SIZE - 1) - -/* Find a VLAN device by the MAC address of its Ethernet device, and - * it's VLAN ID. The default configuration is to have VLAN's scope - * to be box-wide, so the MAC will be ignored. The mac will only be - * looked at if we are configured to have a separate set of VLANs per - * each MAC addressable interface. Note that this latter option does - * NOT follow the spec for VLANs, but may be useful for doing very - * large quantities of VLAN MUX/DEMUX onto FrameRelay or ATM PVCs. - * - * Must be invoked with rcu_read_lock (ie preempt disabled) - * or with RTNL. - */ -struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id); - /* found in vlan_dev.c */ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *orig_dev); diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c index 0eb96f7..69b2f79 100644 --- a/net/8021q/vlan_core.c +++ b/net/8021q/vlan_core.c @@ -4,53 +4,29 @@ #include <linux/netpoll.h> #include "vlan.h" -/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */ -int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, - u16 vlan_tci, int polling) +bool vlan_hwaccel_do_receive(struct sk_buff **skbp) { + struct sk_buff *skb = *skbp; + u16 vlan_id = skb->vlan_tci & VLAN_VID_MASK; struct net_device *vlan_dev; - u16 vlan_id; - - if (netpoll_rx(skb)) - return NET_RX_DROP; - - if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master))) - skb->deliver_no_wcard = 1; + struct vlan_rx_stats *rx_stats; - skb->skb_iif = skb->dev->ifindex; - __vlan_hwaccel_put_tag(skb, vlan_tci); - vlan_id = vlan_tci & VLAN_VID_MASK; - vlan_dev = vlan_group_get_device(grp, vlan_id); - - if (vlan_dev) - skb->dev = vlan_dev; - else if (vlan_id) { - if (!(skb->dev->flags & IFF_PROMISC)) - goto drop; - skb->pkt_type = PACKET_OTHERHOST; + vlan_dev = vlan_find_dev(skb->dev, vlan_id); + if (!vlan_dev) { + if (vlan_id) + skb->pkt_type = PACKET_OTHERHOST; + return false; } - return (polling ? netif_receive_skb(skb) : netif_rx(skb)); + skb = *skbp = skb_share_check(skb, GFP_ATOMIC); + if (unlikely(!skb)) + return false; -drop: - dev_kfree_skb_any(skb); - return NET_RX_DROP; -} -EXPORT_SYMBOL(__vlan_hwaccel_rx); - -int vlan_hwaccel_do_receive(struct sk_buff *skb) -{ - struct net_device *dev = skb->dev; - struct vlan_rx_stats *rx_stats; - - skb->dev = vlan_dev_info(dev)->real_dev; - netif_nit_deliver(skb); - - skb->dev = dev; - skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci); + skb->dev = vlan_dev; + skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci); skb->vlan_tci = 0; - rx_stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_rx_stats); + rx_stats = this_cpu_ptr(vlan_dev_info(vlan_dev)->vlan_rx_stats); u64_stats_update_begin(&rx_stats->syncp); rx_stats->rx_packets++; @@ -67,12 +43,13 @@ int vlan_hwaccel_do_receive(struct sk_buff *skb) * This allows the VLAN to have a different MAC than the * underlying device, and still route correctly. */ if (!compare_ether_addr(eth_hdr(skb)->h_dest, - dev->dev_addr)) + vlan_dev->dev_addr)) skb->pkt_type = PACKET_HOST; break; } u64_stats_update_end(&rx_stats->syncp); - return 0; + + return true; } struct net_device *vlan_dev_real_dev(const struct net_device *dev) @@ -87,71 +64,27 @@ u16 vlan_dev_vlan_id(const struct net_device *dev) } EXPORT_SYMBOL(vlan_dev_vlan_id); -static gro_result_t -vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp, - unsigned int vlan_tci, struct sk_buff *skb) +/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */ +int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, + u16 vlan_tci, int polling) { - struct sk_buff *p; - struct net_device *vlan_dev; - u16 vlan_id; - - if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master))) - skb->deliver_no_wcard = 1; - - skb->skb_iif = skb->dev->ifindex; __vlan_hwaccel_put_tag(skb, vlan_tci); - vlan_id = vlan_tci & VLAN_VID_MASK; - vlan_dev = vlan_group_get_device(grp, vlan_id); - - if (vlan_dev) - skb->dev = vlan_dev; - else if (vlan_id) { - if (!(skb->dev->flags & IFF_PROMISC)) - goto drop; - skb->pkt_type = PACKET_OTHERHOST; - } - - for (p = napi->gro_list; p; p = p->next) { - NAPI_GRO_CB(p)->same_flow = - p->dev == skb->dev && !compare_ether_header( - skb_mac_header(p), skb_gro_mac_header(skb)); - NAPI_GRO_CB(p)->flush = 0; - } - - return dev_gro_receive(napi, skb); - -drop: - return GRO_DROP; + return polling ? netif_receive_skb(skb) : netif_rx(skb); } +EXPORT_SYMBOL(__vlan_hwaccel_rx); gro_result_t vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp, unsigned int vlan_tci, struct sk_buff *skb) { - if (netpoll_rx_on(skb)) - return vlan_hwaccel_receive_skb(skb, grp, vlan_tci) - ? GRO_DROP : GRO_NORMAL; - - skb_gro_reset_offset(skb); - - return napi_skb_finish(vlan_gro_common(napi, grp, vlan_tci, skb), skb); + __vlan_hwaccel_put_tag(skb, vlan_tci); + return napi_gro_receive(napi, skb); } EXPORT_SYMBOL(vlan_gro_receive); gro_result_t vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp, unsigned int vlan_tci) { - struct sk_buff *skb = napi_frags_skb(napi); - - if (!skb) - return GRO_DROP; - - if (netpoll_rx_on(skb)) { - skb->protocol = eth_type_trans(skb, skb->dev); - return vlan_hwaccel_receive_skb(skb, grp, vlan_tci) - ? GRO_DROP : GRO_NORMAL; - } - - return napi_frags_finish(napi, skb, - vlan_gro_common(napi, grp, vlan_tci, skb)); + __vlan_hwaccel_put_tag(napi->skb, vlan_tci); + return napi_gro_frags(napi); } EXPORT_SYMBOL(vlan_gro_frags); diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index 3bccdd1..14e3d1f 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -158,7 +158,7 @@ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, vlan_id = vlan_tci & VLAN_VID_MASK; rcu_read_lock(); - vlan_dev = __find_vlan_dev(dev, vlan_id); + vlan_dev = vlan_find_dev(dev, vlan_id); /* If the VLAN device is defined, we use it. * If not, and the VID is 0, it is a 802.1p packet (not @@ -177,8 +177,8 @@ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, } else { skb->dev = vlan_dev; - rx_stats = per_cpu_ptr(vlan_dev_info(skb->dev)->vlan_rx_stats, - smp_processor_id()); + rx_stats = this_cpu_ptr(vlan_dev_info(skb->dev)->vlan_rx_stats); + u64_stats_update_begin(&rx_stats->syncp); rx_stats->rx_packets++; rx_stats->rx_bytes += skb->len; @@ -226,12 +226,14 @@ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev, } netif_rx(skb); + rcu_read_unlock(); return NET_RX_SUCCESS; err_unlock: rcu_read_unlock(); err_free: + atomic_long_inc(&dev->rx_dropped); kfree_skb(skb); return NET_RX_DROP; } @@ -843,7 +845,7 @@ static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, st accum.rx_packets += rxpackets; accum.rx_bytes += rxbytes; accum.rx_multicast += rxmulticast; - /* rx_errors is an ulong, not protected by syncp */ + /* rx_errors is ulong, not protected by syncp */ accum.rx_errors += p->rx_errors; } stats->rx_packets = accum.rx_packets; |