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-rw-r--r--net/core/dev.c80
-rw-r--r--net/core/filter.c6
-rw-r--r--net/core/neighbour.c13
-rw-r--r--net/core/rtnetlink.c43
4 files changed, 122 insertions, 20 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 7c6a46f8037..d162ba8d622 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -749,7 +749,8 @@ EXPORT_SYMBOL(dev_get_by_index);
* @ha: hardware address
*
* Search for an interface by MAC address. Returns NULL if the device
- * is not found or a pointer to the device. The caller must hold RCU
+ * is not found or a pointer to the device.
+ * The caller must hold RCU or RTNL.
* The returned device has not had its ref count increased
* and the caller must therefore be careful about locking
*
@@ -1285,7 +1286,7 @@ static int __dev_close(struct net_device *dev)
return __dev_close_many(&single);
}
-int dev_close_many(struct list_head *head)
+static int dev_close_many(struct list_head *head)
{
struct net_device *dev, *tmp;
LIST_HEAD(tmp_list);
@@ -1593,6 +1594,48 @@ static void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
rcu_read_unlock();
}
+/* netif_setup_tc - Handle tc mappings on real_num_tx_queues change
+ * @dev: Network device
+ * @txq: number of queues available
+ *
+ * If real_num_tx_queues is changed the tc mappings may no longer be
+ * valid. To resolve this verify the tc mapping remains valid and if
+ * not NULL the mapping. With no priorities mapping to this
+ * offset/count pair it will no longer be used. In the worst case TC0
+ * is invalid nothing can be done so disable priority mappings. If is
+ * expected that drivers will fix this mapping if they can before
+ * calling netif_set_real_num_tx_queues.
+ */
+static void netif_setup_tc(struct net_device *dev, unsigned int txq)
+{
+ int i;
+ struct netdev_tc_txq *tc = &dev->tc_to_txq[0];
+
+ /* If TC0 is invalidated disable TC mapping */
+ if (tc->offset + tc->count > txq) {
+ pr_warning("Number of in use tx queues changed "
+ "invalidating tc mappings. Priority "
+ "traffic classification disabled!\n");
+ dev->num_tc = 0;
+ return;
+ }
+
+ /* Invalidated prio to tc mappings set to TC0 */
+ for (i = 1; i < TC_BITMASK + 1; i++) {
+ int q = netdev_get_prio_tc_map(dev, i);
+
+ tc = &dev->tc_to_txq[q];
+ if (tc->offset + tc->count > txq) {
+ pr_warning("Number of in use tx queues "
+ "changed. Priority %i to tc "
+ "mapping %i is no longer valid "
+ "setting map to 0\n",
+ i, q);
+ netdev_set_prio_tc_map(dev, i, 0);
+ }
+ }
+}
+
/*
* Routine to help set real_num_tx_queues. To avoid skbs mapped to queues
* greater then real_num_tx_queues stale skbs on the qdisc must be flushed.
@@ -1612,6 +1655,9 @@ int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq)
if (rc)
return rc;
+ if (dev->num_tc)
+ netif_setup_tc(dev, txq);
+
if (txq < dev->real_num_tx_queues)
qdisc_reset_all_tx_gt(dev, txq);
}
@@ -2161,6 +2207,8 @@ u16 __skb_tx_hash(const struct net_device *dev, const struct sk_buff *skb,
unsigned int num_tx_queues)
{
u32 hash;
+ u16 qoffset = 0;
+ u16 qcount = num_tx_queues;
if (skb_rx_queue_recorded(skb)) {
hash = skb_get_rx_queue(skb);
@@ -2169,13 +2217,19 @@ u16 __skb_tx_hash(const struct net_device *dev, const struct sk_buff *skb,
return hash;
}
+ if (dev->num_tc) {
+ u8 tc = netdev_get_prio_tc_map(dev, skb->priority);
+ qoffset = dev->tc_to_txq[tc].offset;
+ qcount = dev->tc_to_txq[tc].count;
+ }
+
if (skb->sk && skb->sk->sk_hash)
hash = skb->sk->sk_hash;
else
hash = (__force u16) skb->protocol ^ skb->rxhash;
hash = jhash_1word(hash, hashrnd);
- return (u16) (((u64) hash * num_tx_queues) >> 32);
+ return (u16) (((u64) hash * qcount) >> 32) + qoffset;
}
EXPORT_SYMBOL(__skb_tx_hash);
@@ -2272,15 +2326,18 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
struct netdev_queue *txq)
{
spinlock_t *root_lock = qdisc_lock(q);
- bool contended = qdisc_is_running(q);
+ bool contended;
int rc;
+ qdisc_skb_cb(skb)->pkt_len = skb->len;
+ qdisc_calculate_pkt_len(skb, q);
/*
* Heuristic to force contended enqueues to serialize on a
* separate lock before trying to get qdisc main lock.
* This permits __QDISC_STATE_RUNNING owner to get the lock more often
* and dequeue packets faster.
*/
+ contended = qdisc_is_running(q);
if (unlikely(contended))
spin_lock(&q->busylock);
@@ -2298,7 +2355,6 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
if (!(dev->priv_flags & IFF_XMIT_DST_RELEASE))
skb_dst_force(skb);
- qdisc_skb_cb(skb)->pkt_len = skb->len;
qdisc_bstats_update(q, skb);
if (sch_direct_xmit(skb, q, dev, txq, root_lock)) {
@@ -2313,7 +2369,7 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
rc = NET_XMIT_SUCCESS;
} else {
skb_dst_force(skb);
- rc = qdisc_enqueue_root(skb, q);
+ rc = q->enqueue(skb, q) & NET_XMIT_MASK;
if (qdisc_run_begin(q)) {
if (unlikely(contended)) {
spin_unlock(&q->busylock);
@@ -4572,6 +4628,17 @@ int dev_set_mtu(struct net_device *dev, int new_mtu)
EXPORT_SYMBOL(dev_set_mtu);
/**
+ * dev_set_group - Change group this device belongs to
+ * @dev: device
+ * @new_group: group this device should belong to
+ */
+void dev_set_group(struct net_device *dev, int new_group)
+{
+ dev->group = new_group;
+}
+EXPORT_SYMBOL(dev_set_group);
+
+/**
* dev_set_mac_address - Change Media Access Control Address
* @dev: device
* @sa: new address
@@ -5678,6 +5745,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
dev->priv_flags = IFF_XMIT_DST_RELEASE;
setup(dev);
strcpy(dev->name, name);
+ dev->group = INIT_NETDEV_GROUP;
return dev;
free_pcpu:
diff --git a/net/core/filter.c b/net/core/filter.c
index afc58374ca9..232b1873bb2 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -142,14 +142,14 @@ int sk_filter(struct sock *sk, struct sk_buff *skb)
if (err)
return err;
- rcu_read_lock_bh();
- filter = rcu_dereference_bh(sk->sk_filter);
+ rcu_read_lock();
+ filter = rcu_dereference(sk->sk_filter);
if (filter) {
unsigned int pkt_len = sk_run_filter(skb, filter->insns);
err = pkt_len ? pskb_trim(skb, pkt_len) : -EPERM;
}
- rcu_read_unlock_bh();
+ rcu_read_unlock();
return err;
}
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 60a90291342..799f06e03a2 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -316,7 +316,7 @@ static struct neigh_hash_table *neigh_hash_alloc(unsigned int entries)
{
size_t size = entries * sizeof(struct neighbour *);
struct neigh_hash_table *ret;
- struct neighbour **buckets;
+ struct neighbour __rcu **buckets;
ret = kmalloc(sizeof(*ret), GFP_ATOMIC);
if (!ret)
@@ -324,14 +324,14 @@ static struct neigh_hash_table *neigh_hash_alloc(unsigned int entries)
if (size <= PAGE_SIZE)
buckets = kzalloc(size, GFP_ATOMIC);
else
- buckets = (struct neighbour **)
+ buckets = (struct neighbour __rcu **)
__get_free_pages(GFP_ATOMIC | __GFP_ZERO,
get_order(size));
if (!buckets) {
kfree(ret);
return NULL;
}
- rcu_assign_pointer(ret->hash_buckets, buckets);
+ ret->hash_buckets = buckets;
ret->hash_mask = entries - 1;
get_random_bytes(&ret->hash_rnd, sizeof(ret->hash_rnd));
return ret;
@@ -343,7 +343,7 @@ static void neigh_hash_free_rcu(struct rcu_head *head)
struct neigh_hash_table,
rcu);
size_t size = (nht->hash_mask + 1) * sizeof(struct neighbour *);
- struct neighbour **buckets = nht->hash_buckets;
+ struct neighbour __rcu **buckets = nht->hash_buckets;
if (size <= PAGE_SIZE)
kfree(buckets);
@@ -1540,7 +1540,7 @@ void neigh_table_init_no_netlink(struct neigh_table *tbl)
panic("cannot create neighbour proc dir entry");
#endif
- tbl->nht = neigh_hash_alloc(8);
+ RCU_INIT_POINTER(tbl->nht, neigh_hash_alloc(8));
phsize = (PNEIGH_HASHMASK + 1) * sizeof(struct pneigh_entry *);
tbl->phash_buckets = kzalloc(phsize, GFP_KERNEL);
@@ -1602,7 +1602,8 @@ int neigh_table_clear(struct neigh_table *tbl)
}
write_unlock(&neigh_tbl_lock);
- call_rcu(&tbl->nht->rcu, neigh_hash_free_rcu);
+ call_rcu(&rcu_dereference_protected(tbl->nht, 1)->rcu,
+ neigh_hash_free_rcu);
tbl->nht = NULL;
kfree(tbl->phash_buckets);
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 750db57f3bb..c668f8c371b 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -868,6 +868,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
+ NLA_PUT_U32(skb, IFLA_GROUP, dev->group);
if (dev->ifindex != dev->iflink)
NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
@@ -1265,6 +1266,11 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
modified = 1;
}
+ if (tb[IFLA_GROUP]) {
+ dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
+ modified = 1;
+ }
+
/*
* Interface selected by interface index but interface
* name provided implies that a name change has been
@@ -1542,6 +1548,8 @@ struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
if (tb[IFLA_LINKMODE])
dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
+ if (tb[IFLA_GROUP])
+ dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
return dev;
@@ -1552,6 +1560,24 @@ err:
}
EXPORT_SYMBOL(rtnl_create_link);
+static int rtnl_group_changelink(struct net *net, int group,
+ struct ifinfomsg *ifm,
+ struct nlattr **tb)
+{
+ struct net_device *dev;
+ int err;
+
+ for_each_netdev(net, dev) {
+ if (dev->group == group) {
+ err = do_setlink(dev, ifm, tb, NULL, 0);
+ if (err < 0)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
struct net *net = sock_net(skb->sk);
@@ -1579,10 +1605,12 @@ replay:
ifm = nlmsg_data(nlh);
if (ifm->ifi_index > 0)
dev = __dev_get_by_index(net, ifm->ifi_index);
- else if (ifname[0])
- dev = __dev_get_by_name(net, ifname);
- else
- dev = NULL;
+ else {
+ if (ifname[0])
+ dev = __dev_get_by_name(net, ifname);
+ else
+ dev = NULL;
+ }
err = validate_linkmsg(dev, tb);
if (err < 0)
@@ -1646,8 +1674,13 @@ replay:
return do_setlink(dev, ifm, tb, ifname, modified);
}
- if (!(nlh->nlmsg_flags & NLM_F_CREATE))
+ if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
+ if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
+ return rtnl_group_changelink(net,
+ nla_get_u32(tb[IFLA_GROUP]),
+ ifm, tb);
return -ENODEV;
+ }
if (ifm->ifi_index)
return -EOPNOTSUPP;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-03 09:40:23 +0000