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-rw-r--r--net/8021q/vlan.c93
-rw-r--r--net/8021q/vlan.h17
-rw-r--r--net/8021q/vlan_core.c121
-rw-r--r--net/8021q/vlan_dev.c10
4 files changed, 57 insertions, 184 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index a2ad1525057..05b867e4375 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 8d9503ad01d..db01b3181fd 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 0eb96f7e44b..69b2f79800a 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 3bccdd12a26..14e3d1fa07a 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;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 19:53:36 +0000