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-rw-r--r--net/core/datagram.c5
-rw-r--r--net/core/dev.c597
-rw-r--r--net/core/dst.c39
-rw-r--r--net/core/ethtool.c91
-rw-r--r--net/core/fib_rules.c16
-rw-r--r--net/core/filter.c10
-rw-r--r--net/core/flow.c82
-rw-r--r--net/core/gen_estimator.c4
-rw-r--r--net/core/iovec.c6
-rw-r--r--net/core/neighbour.c486
-rw-r--r--net/core/net-sysfs.c39
-rw-r--r--net/core/net-sysfs.h4
-rw-r--r--net/core/netpoll.c6
-rw-r--r--net/core/pktgen.c12
-rw-r--r--net/core/rtnetlink.c39
-rw-r--r--net/core/skbuff.c105
-rw-r--r--net/core/sock.c4
-rw-r--r--net/core/utils.c15
18 files changed, 928 insertions, 632 deletions
diff --git a/net/core/datagram.c b/net/core/datagram.c
index 282806ba7a5..cd1e039c875 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -747,13 +747,12 @@ unsigned int datagram_poll(struct file *file, struct socket *sock,
if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
mask |= POLLERR;
if (sk->sk_shutdown & RCV_SHUTDOWN)
- mask |= POLLRDHUP;
+ mask |= POLLRDHUP | POLLIN | POLLRDNORM;
if (sk->sk_shutdown == SHUTDOWN_MASK)
mask |= POLLHUP;
/* readable? */
- if (!skb_queue_empty(&sk->sk_receive_queue) ||
- (sk->sk_shutdown & RCV_SHUTDOWN))
+ if (!skb_queue_empty(&sk->sk_receive_queue))
mask |= POLLIN | POLLRDNORM;
/* Connection-based need to check for termination and startup */
diff --git a/net/core/dev.c b/net/core/dev.c
index 7ec85e27bee..78b5a89b0f4 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -131,6 +131,7 @@
#include <trace/events/net.h>
#include <trace/events/skb.h>
#include <linux/pci.h>
+#include <linux/inetdevice.h>
#include "net-sysfs.h"
@@ -373,6 +374,14 @@ static inline void netdev_set_addr_lockdep_class(struct net_device *dev)
* --ANK (980803)
*/
+static inline struct list_head *ptype_head(const struct packet_type *pt)
+{
+ if (pt->type == htons(ETH_P_ALL))
+ return &ptype_all;
+ else
+ return &ptype_base[ntohs(pt->type) & PTYPE_HASH_MASK];
+}
+
/**
* dev_add_pack - add packet handler
* @pt: packet type declaration
@@ -388,16 +397,11 @@ static inline void netdev_set_addr_lockdep_class(struct net_device *dev)
void dev_add_pack(struct packet_type *pt)
{
- int hash;
+ struct list_head *head = ptype_head(pt);
- spin_lock_bh(&ptype_lock);
- if (pt->type == htons(ETH_P_ALL))
- list_add_rcu(&pt->list, &ptype_all);
- else {
- hash = ntohs(pt->type) & PTYPE_HASH_MASK;
- list_add_rcu(&pt->list, &ptype_base[hash]);
- }
- spin_unlock_bh(&ptype_lock);
+ spin_lock(&ptype_lock);
+ list_add_rcu(&pt->list, head);
+ spin_unlock(&ptype_lock);
}
EXPORT_SYMBOL(dev_add_pack);
@@ -416,15 +420,10 @@ EXPORT_SYMBOL(dev_add_pack);
*/
void __dev_remove_pack(struct packet_type *pt)
{
- struct list_head *head;
+ struct list_head *head = ptype_head(pt);
struct packet_type *pt1;
- spin_lock_bh(&ptype_lock);
-
- if (pt->type == htons(ETH_P_ALL))
- head = &ptype_all;
- else
- head = &ptype_base[ntohs(pt->type) & PTYPE_HASH_MASK];
+ spin_lock(&ptype_lock);
list_for_each_entry(pt1, head, list) {
if (pt == pt1) {
@@ -435,7 +434,7 @@ void __dev_remove_pack(struct packet_type *pt)
printk(KERN_WARNING "dev_remove_pack: %p not found.\n", pt);
out:
- spin_unlock_bh(&ptype_lock);
+ spin_unlock(&ptype_lock);
}
EXPORT_SYMBOL(__dev_remove_pack);
@@ -1486,8 +1485,9 @@ int dev_forward_skb(struct net_device *dev, struct sk_buff *skb)
skb_orphan(skb);
nf_reset(skb);
- if (!(dev->flags & IFF_UP) ||
- (skb->len > (dev->mtu + dev->hard_header_len))) {
+ if (unlikely(!(dev->flags & IFF_UP) ||
+ (skb->len > (dev->mtu + dev->hard_header_len + VLAN_HLEN)))) {
+ atomic_long_inc(&dev->rx_dropped);
kfree_skb(skb);
return NET_RX_DROP;
}
@@ -1555,21 +1555,56 @@ static void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
* 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.
*/
-void netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq)
+int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq)
{
- unsigned int real_num = dev->real_num_tx_queues;
+ if (txq < 1 || txq > dev->num_tx_queues)
+ return -EINVAL;
- if (unlikely(txq > dev->num_tx_queues))
- ;
- else if (txq > real_num)
- dev->real_num_tx_queues = txq;
- else if (txq < real_num) {
- dev->real_num_tx_queues = txq;
- qdisc_reset_all_tx_gt(dev, txq);
+ if (dev->reg_state == NETREG_REGISTERED) {
+ ASSERT_RTNL();
+
+ if (txq < dev->real_num_tx_queues)
+ qdisc_reset_all_tx_gt(dev, txq);
}
+
+ dev->real_num_tx_queues = txq;
+ return 0;
}
EXPORT_SYMBOL(netif_set_real_num_tx_queues);
+#ifdef CONFIG_RPS
+/**
+ * netif_set_real_num_rx_queues - set actual number of RX queues used
+ * @dev: Network device
+ * @rxq: Actual number of RX queues
+ *
+ * This must be called either with the rtnl_lock held or before
+ * registration of the net device. Returns 0 on success, or a
+ * negative error code. If called before registration, it always
+ * succeeds.
+ */
+int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq)
+{
+ int rc;
+
+ if (rxq < 1 || rxq > dev->num_rx_queues)
+ return -EINVAL;
+
+ if (dev->reg_state == NETREG_REGISTERED) {
+ ASSERT_RTNL();
+
+ rc = net_rx_queue_update_kobjects(dev, dev->real_num_rx_queues,
+ rxq);
+ if (rc)
+ return rc;
+ }
+
+ dev->real_num_rx_queues = rxq;
+ return 0;
+}
+EXPORT_SYMBOL(netif_set_real_num_rx_queues);
+#endif
+
static inline void __netif_reschedule(struct Qdisc *q)
{
struct softnet_data *sd;
@@ -1661,7 +1696,12 @@ static bool can_checksum_protocol(unsigned long features, __be16 protocol)
static bool dev_can_checksum(struct net_device *dev, struct sk_buff *skb)
{
- if (can_checksum_protocol(dev->features, skb->protocol))
+ int features = dev->features;
+
+ if (vlan_tx_tag_present(skb))
+ features &= dev->vlan_features;
+
+ if (can_checksum_protocol(features, skb->protocol))
return true;
if (skb->protocol == htons(ETH_P_8021Q)) {
@@ -1760,6 +1800,16 @@ struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features)
__be16 type = skb->protocol;
int err;
+ if (type == htons(ETH_P_8021Q)) {
+ struct vlan_ethhdr *veh;
+
+ if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
+ return ERR_PTR(-EINVAL);
+
+ veh = (struct vlan_ethhdr *)skb->data;
+ type = veh->h_vlan_encapsulated_proto;
+ }
+
skb_reset_mac_header(skb);
skb->mac_len = skb->network_header - skb->mac_header;
__skb_pull(skb, skb->mac_len);
@@ -1904,14 +1954,14 @@ static int dev_gso_segment(struct sk_buff *skb)
/*
* Try to orphan skb early, right before transmission by the device.
- * We cannot orphan skb if tx timestamp is requested, since
- * drivers need to call skb_tstamp_tx() to send the timestamp.
+ * We cannot orphan skb if tx timestamp is requested or the sk-reference
+ * is needed on driver level for other reasons, e.g. see net/can/raw.c
*/
static inline void skb_orphan_try(struct sk_buff *skb)
{
struct sock *sk = skb->sk;
- if (sk && !skb_tx(skb)->flags) {
+ if (sk && !skb_shinfo(skb)->tx_flags) {
/* skb_tx_hash() wont be able to get sk.
* We copy sk_hash into skb->rxhash
*/
@@ -1931,9 +1981,14 @@ static inline void skb_orphan_try(struct sk_buff *skb)
static inline int skb_needs_linearize(struct sk_buff *skb,
struct net_device *dev)
{
+ int features = dev->features;
+
+ if (skb->protocol == htons(ETH_P_8021Q) || vlan_tx_tag_present(skb))
+ features &= dev->vlan_features;
+
return skb_is_nonlinear(skb) &&
- ((skb_has_frags(skb) && !(dev->features & NETIF_F_FRAGLIST)) ||
- (skb_shinfo(skb)->nr_frags && (!(dev->features & NETIF_F_SG) ||
+ ((skb_has_frag_list(skb) && !(features & NETIF_F_FRAGLIST)) ||
+ (skb_shinfo(skb)->nr_frags && (!(features & NETIF_F_SG) ||
illegal_highdma(dev, skb))));
}
@@ -1956,6 +2011,15 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
skb_orphan_try(skb);
+ if (vlan_tx_tag_present(skb) &&
+ !(dev->features & NETIF_F_HW_VLAN_TX)) {
+ skb = __vlan_put_tag(skb, vlan_tx_tag_get(skb));
+ if (unlikely(!skb))
+ goto out;
+
+ skb->vlan_tci = 0;
+ }
+
if (netif_needs_gso(dev, skb)) {
if (unlikely(dev_gso_segment(skb)))
goto out_kfree_skb;
@@ -2019,6 +2083,7 @@ out_kfree_gso_skb:
skb->destructor = DEV_GSO_CB(skb)->destructor;
out_kfree_skb:
kfree_skb(skb);
+out:
return rc;
}
@@ -2147,6 +2212,9 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
return rc;
}
+static DEFINE_PER_CPU(int, xmit_recursion);
+#define RECURSION_LIMIT 3
+
/**
* dev_queue_xmit - transmit a buffer
* @skb: buffer to transmit
@@ -2213,10 +2281,15 @@ int dev_queue_xmit(struct sk_buff *skb)
if (txq->xmit_lock_owner != cpu) {
+ if (__this_cpu_read(xmit_recursion) > RECURSION_LIMIT)
+ goto recursion_alert;
+
HARD_TX_LOCK(dev, txq, cpu);
if (!netif_tx_queue_stopped(txq)) {
+ __this_cpu_inc(xmit_recursion);
rc = dev_hard_start_xmit(skb, dev, txq);
+ __this_cpu_dec(xmit_recursion);
if (dev_xmit_complete(rc)) {
HARD_TX_UNLOCK(dev, txq);
goto out;
@@ -2228,7 +2301,9 @@ int dev_queue_xmit(struct sk_buff *skb)
"queue packet!\n", dev->name);
} else {
/* Recursion is detected! It is possible,
- * unfortunately */
+ * unfortunately
+ */
+recursion_alert:
if (net_ratelimit())
printk(KERN_CRIT "Dead loop on virtual device "
"%s, fix it urgently!\n", dev->name);
@@ -2264,69 +2339,44 @@ static inline void ____napi_schedule(struct softnet_data *sd,
__raise_softirq_irqoff(NET_RX_SOFTIRQ);
}
-#ifdef CONFIG_RPS
-
-/* One global table that all flow-based protocols share. */
-struct rps_sock_flow_table *rps_sock_flow_table __read_mostly;
-EXPORT_SYMBOL(rps_sock_flow_table);
-
/*
- * get_rps_cpu is called from netif_receive_skb and returns the target
- * CPU from the RPS map of the receiving queue for a given skb.
- * rcu_read_lock must be held on entry.
+ * __skb_get_rxhash: calculate a flow hash based on src/dst addresses
+ * and src/dst port numbers. Returns a non-zero hash number on success
+ * and 0 on failure.
*/
-static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb,
- struct rps_dev_flow **rflowp)
+__u32 __skb_get_rxhash(struct sk_buff *skb)
{
+ int nhoff, hash = 0, poff;
struct ipv6hdr *ip6;
struct iphdr *ip;
- struct netdev_rx_queue *rxqueue;
- struct rps_map *map;
- struct rps_dev_flow_table *flow_table;
- struct rps_sock_flow_table *sock_flow_table;
- int cpu = -1;
u8 ip_proto;
- u16 tcpu;
u32 addr1, addr2, ihl;
union {
u32 v32;
u16 v16[2];
} ports;
- if (skb_rx_queue_recorded(skb)) {
- u16 index = skb_get_rx_queue(skb);
- if (unlikely(index >= dev->num_rx_queues)) {
- WARN_ONCE(dev->num_rx_queues > 1, "%s received packet "
- "on queue %u, but number of RX queues is %u\n",
- dev->name, index, dev->num_rx_queues);
- goto done;
- }
- rxqueue = dev->_rx + index;
- } else
- rxqueue = dev->_rx;
-
- if (!rxqueue->rps_map && !rxqueue->rps_flow_table)
- goto done;
-
- if (skb->rxhash)
- goto got_hash; /* Skip hash computation on packet header */
+ nhoff = skb_network_offset(skb);
switch (skb->protocol) {
case __constant_htons(ETH_P_IP):
- if (!pskb_may_pull(skb, sizeof(*ip)))
+ if (!pskb_may_pull(skb, sizeof(*ip) + nhoff))
goto done;
- ip = (struct iphdr *) skb->data;
- ip_proto = ip->protocol;
+ ip = (struct iphdr *) (skb->data + nhoff);
+ if (ip->frag_off & htons(IP_MF | IP_OFFSET))
+ ip_proto = 0;
+ else
+ ip_proto = ip->protocol;
addr1 = (__force u32) ip->saddr;
addr2 = (__force u32) ip->daddr;
ihl = ip->ihl;
break;
case __constant_htons(ETH_P_IPV6):
- if (!pskb_may_pull(skb, sizeof(*ip6)))
+ if (!pskb_may_pull(skb, sizeof(*ip6) + nhoff))
goto done;
- ip6 = (struct ipv6hdr *) skb->data;
+ ip6 = (struct ipv6hdr *) (skb->data + nhoff);
ip_proto = ip6->nexthdr;
addr1 = (__force u32) ip6->saddr.s6_addr32[3];
addr2 = (__force u32) ip6->daddr.s6_addr32[3];
@@ -2335,33 +2385,81 @@ static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb,
default:
goto done;
}
- switch (ip_proto) {
- case IPPROTO_TCP:
- case IPPROTO_UDP:
- case IPPROTO_DCCP:
- case IPPROTO_ESP:
- case IPPROTO_AH:
- case IPPROTO_SCTP:
- case IPPROTO_UDPLITE:
- if (pskb_may_pull(skb, (ihl * 4) + 4)) {
- ports.v32 = * (__force u32 *) (skb->data + (ihl * 4));
+
+ ports.v32 = 0;
+ poff = proto_ports_offset(ip_proto);
+ if (poff >= 0) {
+ nhoff += ihl * 4 + poff;
+ if (pskb_may_pull(skb, nhoff + 4)) {
+ ports.v32 = * (__force u32 *) (skb->data + nhoff);
if (ports.v16[1] < ports.v16[0])
swap(ports.v16[0], ports.v16[1]);
- break;
}
- default:
- ports.v32 = 0;
- break;
}
/* get a consistent hash (same value on both flow directions) */
if (addr2 < addr1)
swap(addr1, addr2);
- skb->rxhash = jhash_3words(addr1, addr2, ports.v32, hashrnd);
- if (!skb->rxhash)
- skb->rxhash = 1;
-got_hash:
+ hash = jhash_3words(addr1, addr2, ports.v32, hashrnd);
+ if (!hash)
+ hash = 1;
+
+done:
+ return hash;
+}
+EXPORT_SYMBOL(__skb_get_rxhash);
+
+#ifdef CONFIG_RPS
+
+/* One global table that all flow-based protocols share. */
+struct rps_sock_flow_table *rps_sock_flow_table __read_mostly;
+EXPORT_SYMBOL(rps_sock_flow_table);
+
+/*
+ * get_rps_cpu is called from netif_receive_skb and returns the target
+ * CPU from the RPS map of the receiving queue for a given skb.
+ * rcu_read_lock must be held on entry.
+ */
+static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb,
+ struct rps_dev_flow **rflowp)
+{
+ struct netdev_rx_queue *rxqueue;
+ struct rps_map *map = NULL;
+ struct rps_dev_flow_table *flow_table;
+ struct rps_sock_flow_table *sock_flow_table;
+ int cpu = -1;
+ u16 tcpu;
+
+ if (skb_rx_queue_recorded(skb)) {
+ u16 index = skb_get_rx_queue(skb);
+ if (unlikely(index >= dev->real_num_rx_queues)) {
+ WARN_ONCE(dev->real_num_rx_queues > 1,
+ "%s received packet on queue %u, but number "
+ "of RX queues is %u\n",
+ dev->name, index, dev->real_num_rx_queues);
+ goto done;
+ }
+ rxqueue = dev->_rx + index;
+ } else
+ rxqueue = dev->_rx;
+
+ if (rxqueue->rps_map) {
+ map = rcu_dereference(rxqueue->rps_map);
+ if (map && map->len == 1) {
+ tcpu = map->cpus[0];
+ if (cpu_online(tcpu))
+ cpu = tcpu;
+ goto done;
+ }
+ } else if (!rxqueue->rps_flow_table) {
+ goto done;
+ }
+
+ skb_reset_network_header(skb);
+ if (!skb_get_rxhash(skb))
+ goto done;
+
flow_table = rcu_dereference(rxqueue->rps_flow_table);
sock_flow_table = rcu_dereference(rps_sock_flow_table);
if (flow_table && sock_flow_table) {
@@ -2401,7 +2499,6 @@ got_hash:
}
}
- map = rcu_dereference(rxqueue->rps_map);
if (map) {
tcpu = map->cpus[((u64) skb->rxhash * map->len) >> 32];
@@ -2487,6 +2584,7 @@ enqueue:
local_irq_restore(flags);
+ atomic_long_inc(&skb->dev->rx_dropped);
kfree_skb(skb);
return NET_RX_DROP;
}
@@ -2643,11 +2741,10 @@ EXPORT_SYMBOL_GPL(br_fdb_test_addr_hook);
* the ingress scheduler, you just cant add policies on ingress.
*
*/
-static int ing_filter(struct sk_buff *skb)
+static int ing_filter(struct sk_buff *skb, struct netdev_queue *rxq)
{
struct net_device *dev = skb->dev;
u32 ttl = G_TC_RTTL(skb->tc_verd);
- struct netdev_queue *rxq;
int result = TC_ACT_OK;
struct Qdisc *q;
@@ -2661,8 +2758,6 @@ static int ing_filter(struct sk_buff *skb)
skb->tc_verd = SET_TC_RTTL(skb->tc_verd, ttl);
skb->tc_verd = SET_TC_AT(skb->tc_verd, AT_INGRESS);
- rxq = &dev->rx_queue;
-
q = rxq->qdisc;
if (q != &noop_qdisc) {
spin_lock(qdisc_lock(q));
@@ -2678,7 +2773,9 @@ static inline struct sk_buff *handle_ing(struct sk_buff *skb,
struct packet_type **pt_prev,
int *ret, struct net_device *orig_dev)
{
- if (skb->dev->rx_queue.qdisc == &noop_qdisc)
+ struct netdev_queue *rxq = rcu_dereference(skb->dev->ingress_queue);
+
+ if (!rxq || rxq->qdisc == &noop_qdisc)
goto out;
if (*pt_prev) {
@@ -2686,7 +2783,7 @@ static inline struct sk_buff *handle_ing(struct sk_buff *skb,
*pt_prev = NULL;
}
- switch (ing_filter(skb)) {
+ switch (ing_filter(skb, rxq)) {
case TC_ACT_SHOT:
case TC_ACT_STOLEN:
kfree_skb(skb);
@@ -2699,33 +2796,6 @@ out:
}
#endif
-/*
- * netif_nit_deliver - deliver received packets to network taps
- * @skb: buffer
- *
- * This function is used to deliver incoming packets to network
- * taps. It should be used when the normal netif_receive_skb path
- * is bypassed, for example because of VLAN acceleration.
- */
-void netif_nit_deliver(struct sk_buff *skb)
-{
- struct packet_type *ptype;
-
- if (list_empty(&ptype_all))
- return;
-
- skb_reset_network_header(skb);
- skb_reset_transport_header(skb);
- skb->mac_len = skb->network_header - skb->mac_header;
-
- rcu_read_lock();
- list_for_each_entry_rcu(ptype, &ptype_all, list) {
- if (!ptype->dev || ptype->dev == skb->dev)
- deliver_skb(skb, ptype, skb->dev);
- }
- rcu_read_unlock();
-}
-
/**
* netdev_rx_handler_register - register receive handler
* @dev: device to register a handler for
@@ -2836,8 +2906,6 @@ static int __netif_receive_skb(struct sk_buff *skb)
net_timestamp_check(skb);
trace_netif_receive_skb(skb);
- if (vlan_tx_tag_present(skb) && vlan_hwaccel_do_receive(skb))
- return NET_RX_SUCCESS;
/* if we've gotten here through NAPI, check netpoll */
if (netpoll_receive_skb(skb))
@@ -2851,8 +2919,7 @@ static int __netif_receive_skb(struct sk_buff *skb)
* be delivered to pkt handlers that are exact matches. Also
* the deliver_no_wcard flag will be set. If packet handlers
* are sensitive to duplicate packets these skbs will need to
- * be dropped at the handler. The vlan accel path may have
- * already set the deliver_no_wcard flag.
+ * be dropped at the handler.
*/
null_or_orig = NULL;
orig_dev = skb->dev;
@@ -2911,6 +2978,18 @@ ncls:
goto out;
}
+ if (vlan_tx_tag_present(skb)) {
+ if (pt_prev) {
+ ret = deliver_skb(skb, pt_prev, orig_dev);
+ pt_prev = NULL;
+ }
+ if (vlan_hwaccel_do_receive(&skb)) {
+ ret = __netif_receive_skb(skb);
+ goto out;
+ } else if (unlikely(!skb))
+ goto out;
+ }
+
/*
* Make sure frames received on VLAN interfaces stacked on
* bonding interfaces still make their way to any base bonding
@@ -2938,6 +3017,7 @@ ncls:
if (pt_prev) {
ret = pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
} else {
+ atomic_long_inc(&skb->dev->rx_dropped);
kfree_skb(skb);
/* Jamal, now you will not able to escape explaining
* me how you were going to use this. :-)
@@ -3058,7 +3138,7 @@ out:
return netif_receive_skb(skb);
}
-static void napi_gro_flush(struct napi_struct *napi)
+inline void napi_gro_flush(struct napi_struct *napi)
{
struct sk_buff *skb, *next;
@@ -3071,6 +3151,7 @@ static void napi_gro_flush(struct napi_struct *napi)
napi->gro_count = 0;
napi->gro_list = NULL;
}
+EXPORT_SYMBOL(napi_gro_flush);
enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
{
@@ -3085,7 +3166,7 @@ enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
if (!(skb->dev->features & NETIF_F_GRO) || netpoll_rx_on(skb))
goto normal;
- if (skb_is_gso(skb) || skb_has_frags(skb))
+ if (skb_is_gso(skb) || skb_has_frag_list(skb))
goto normal;
rcu_read_lock();
@@ -3164,16 +3245,19 @@ normal:
}
EXPORT_SYMBOL(dev_gro_receive);
-static gro_result_t
+static inline gro_result_t
__napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
{
struct sk_buff *p;
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),
+ unsigned long diffs;
+
+ diffs = (unsigned long)p->dev ^ (unsigned long)skb->dev;
+ diffs |= p->vlan_tci ^ skb->vlan_tci;
+ diffs |= compare_ether_header(skb_mac_header(p),
skb_gro_mac_header(skb));
+ NAPI_GRO_CB(p)->same_flow = !diffs;
NAPI_GRO_CB(p)->flush = 0;
}
@@ -3226,14 +3310,14 @@ gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
}
EXPORT_SYMBOL(napi_gro_receive);
-void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
+static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
{
__skb_pull(skb, skb_headlen(skb));
skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb));
+ skb->vlan_tci = 0;
napi->skb = skb;
}
-EXPORT_SYMBOL(napi_reuse_skb);
struct sk_buff *napi_get_frags(struct napi_struct *napi)
{
@@ -4867,21 +4951,6 @@ static void rollback_registered(struct net_device *dev)
rollback_registered_many(&single);
}
-static void __netdev_init_queue_locks_one(struct net_device *dev,
- struct netdev_queue *dev_queue,
- void *_unused)
-{
- spin_lock_init(&dev_queue->_xmit_lock);
- netdev_set_xmit_lockdep_class(&dev_queue->_xmit_lock, dev->type);
- dev_queue->xmit_lock_owner = -1;
-}
-
-static void netdev_init_queue_locks(struct net_device *dev)
-{
- netdev_for_each_tx_queue(dev, __netdev_init_queue_locks_one, NULL);
- __netdev_init_queue_locks_one(dev, &dev->rx_queue, NULL);
-}
-
unsigned long netdev_fix_features(unsigned long features, const char *name)
{
/* Fix illegal SG+CSUM combinations. */
@@ -4949,6 +5018,66 @@ void netif_stacked_transfer_operstate(const struct net_device *rootdev,
}
EXPORT_SYMBOL(netif_stacked_transfer_operstate);
+static int netif_alloc_rx_queues(struct net_device *dev)
+{
+#ifdef CONFIG_RPS
+ unsigned int i, count = dev->num_rx_queues;
+ struct netdev_rx_queue *rx;
+
+ BUG_ON(count < 1);
+
+ rx = kcalloc(count, sizeof(struct netdev_rx_queue), GFP_KERNEL);
+ if (!rx) {
+ pr_err("netdev: Unable to allocate %u rx queues.\n", count);
+ return -ENOMEM;
+ }
+ dev->_rx = rx;
+
+ /*
+ * Set a pointer to first element in the array which holds the
+ * reference count.
+ */
+ for (i = 0; i < count; i++)
+ rx[i].first = rx;
+#endif
+ return 0;
+}
+
+static int netif_alloc_netdev_queues(struct net_device *dev)
+{
+ unsigned int count = dev->num_tx_queues;
+ struct netdev_queue *tx;
+
+ BUG_ON(count < 1);
+
+ tx = kcalloc(count, sizeof(struct netdev_queue), GFP_KERNEL);
+ if (!tx) {
+ pr_err("netdev: Unable to allocate %u tx queues.\n",
+ count);
+ return -ENOMEM;
+ }
+ dev->_tx = tx;
+ return 0;
+}
+
+static void netdev_init_one_queue(struct net_device *dev,
+ struct netdev_queue *queue,
+ void *_unused)
+{
+ queue->dev = dev;
+
+ /* Initialize queue lock */
+ spin_lock_init(&queue->_xmit_lock);
+ netdev_set_xmit_lockdep_class(&queue->_xmit_lock, dev->type);
+ queue->xmit_lock_owner = -1;
+}
+
+static void netdev_init_queues(struct net_device *dev)
+{
+ netdev_for_each_tx_queue(dev, netdev_init_one_queue, NULL);
+ spin_lock_init(&dev->tx_global_lock);
+}
+
/**
* register_netdevice - register a network device
* @dev: device to register
@@ -4982,28 +5111,19 @@ int register_netdevice(struct net_device *dev)
spin_lock_init(&dev->addr_list_lock);
netdev_set_addr_lockdep_class(dev);
- netdev_init_queue_locks(dev);
dev->iflink = -1;
-#ifdef CONFIG_RPS
- if (!dev->num_rx_queues) {
- /*
- * Allocate a single RX queue if driver never called
- * alloc_netdev_mq
- */
+ ret = netif_alloc_rx_queues(dev);
+ if (ret)
+ goto out;
- dev->_rx = kzalloc(sizeof(struct netdev_rx_queue), GFP_KERNEL);
- if (!dev->_rx) {
- ret = -ENOMEM;
- goto out;
- }
+ ret = netif_alloc_netdev_queues(dev);
+ if (ret)
+ goto out;
+
+ netdev_init_queues(dev);
- dev->_rx->first = dev->_rx;
- atomic_set(&dev->_rx->count, 1);
- dev->num_rx_queues = 1;
- }
-#endif
/* Init, if this function is available */
if (dev->netdev_ops->ndo_init) {
ret = dev->netdev_ops->ndo_init(dev);
@@ -5043,6 +5163,12 @@ int register_netdevice(struct net_device *dev)
if (dev->features & NETIF_F_SG)
dev->features |= NETIF_F_GSO;
+ /* Enable GRO and NETIF_F_HIGHDMA for vlans by default,
+ * vlan_dev_init() will do the dev->features check, so these features
+ * are enabled only if supported by underlying device.
+ */
+ dev->vlan_features |= (NETIF_F_GRO | NETIF_F_HIGHDMA);
+
ret = call_netdevice_notifiers(NETDEV_POST_INIT, dev);
ret = notifier_to_errno(ret);
if (ret)
@@ -5113,9 +5239,6 @@ int init_dummy_netdev(struct net_device *dev)
*/
dev->reg_state = NETREG_DUMMY;
- /* initialize the ref count */
- atomic_set(&dev->refcnt, 1);
-
/* NAPI wants this */
INIT_LIST_HEAD(&dev->napi_list);
@@ -5123,6 +5246,11 @@ int init_dummy_netdev(struct net_device *dev)
set_bit(__LINK_STATE_PRESENT, &dev->state);
set_bit(__LINK_STATE_START, &dev->state);
+ /* Note : We dont allocate pcpu_refcnt for dummy devices,
+ * because users of this 'device' dont need to change
+ * its refcount.
+ */
+
return 0;
}
EXPORT_SYMBOL_GPL(init_dummy_netdev);
@@ -5164,6 +5292,16 @@ out:
}
EXPORT_SYMBOL(register_netdev);
+int netdev_refcnt_read(const struct net_device *dev)
+{
+ int i, refcnt = 0;
+
+ for_each_possible_cpu(i)
+ refcnt += *per_cpu_ptr(dev->pcpu_refcnt, i);
+ return refcnt;
+}
+EXPORT_SYMBOL(netdev_refcnt_read);
+
/*
* netdev_wait_allrefs - wait until all references are gone.
*
@@ -5178,11 +5316,14 @@ EXPORT_SYMBOL(register_netdev);
static void netdev_wait_allrefs(struct net_device *dev)
{
unsigned long rebroadcast_time, warning_time;
+ int refcnt;
linkwatch_forget_dev(dev);
rebroadcast_time = warning_time = jiffies;
- while (atomic_read(&dev->refcnt) != 0) {
+ refcnt = netdev_refcnt_read(dev);
+
+ while (refcnt != 0) {
if (time_after(jiffies, rebroadcast_time + 1 * HZ)) {
rtnl_lock();
@@ -5209,11 +5350,13 @@ static void netdev_wait_allrefs(struct net_device *dev)
msleep(250);
+ refcnt = netdev_refcnt_read(dev);
+
if (time_after(jiffies, warning_time + 10 * HZ)) {
printk(KERN_EMERG "unregister_netdevice: "
"waiting for %s to become free. Usage "
"count = %d\n",
- dev->name, atomic_read(&dev->refcnt));
+ dev->name, refcnt);
warning_time = jiffies;
}
}
@@ -5271,8 +5414,8 @@ void netdev_run_todo(void)
netdev_wait_allrefs(dev);
/* paranoia */
- BUG_ON(atomic_read(&dev->refcnt));
- WARN_ON(dev->ip_ptr);
+ BUG_ON(netdev_refcnt_read(dev));
+ WARN_ON(rcu_dereference_raw(dev->ip_ptr));
WARN_ON(dev->ip6_ptr);
WARN_ON(dev->dn_ptr);
@@ -5350,30 +5493,34 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
if (ops->ndo_get_stats64) {
memset(storage, 0, sizeof(*storage));
- return ops->ndo_get_stats64(dev, storage);
- }
- if (ops->ndo_get_stats) {
+ ops->ndo_get_stats64(dev, storage);
+ } else if (ops->ndo_get_stats) {
netdev_stats_to_stats64(storage, ops->ndo_get_stats(dev));
- return storage;
+ } else {
+ netdev_stats_to_stats64(storage, &dev->stats);
+ dev_txq_stats_fold(dev, storage);
}
- netdev_stats_to_stats64(storage, &dev->stats);
- dev_txq_stats_fold(dev, storage);
+ storage->rx_dropped += atomic_long_read(&dev->rx_dropped);
return storage;
}
EXPORT_SYMBOL(dev_get_stats);
-static void netdev_init_one_queue(struct net_device *dev,
- struct netdev_queue *queue,
- void *_unused)
+struct netdev_queue *dev_ingress_queue_create(struct net_device *dev)
{
- queue->dev = dev;
-}
+ struct netdev_queue *queue = dev_ingress_queue(dev);
-static void netdev_init_queues(struct net_device *dev)
-{
- netdev_init_one_queue(dev, &dev->rx_queue, NULL);
- netdev_for_each_tx_queue(dev, netdev_init_one_queue, NULL);
- spin_lock_init(&dev->tx_global_lock);
+#ifdef CONFIG_NET_CLS_ACT
+ if (queue)
+ return queue;
+ queue = kzalloc(sizeof(*queue), GFP_KERNEL);
+ if (!queue)
+ return NULL;
+ netdev_init_one_queue(dev, queue, NULL);
+ queue->qdisc = &noop_qdisc;
+ queue->qdisc_sleeping = &noop_qdisc;
+ rcu_assign_pointer(dev->ingress_queue, queue);
+#endif
+ return queue;
}
/**
@@ -5390,17 +5537,18 @@ static void netdev_init_queues(struct net_device *dev)
struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
void (*setup)(struct net_device *), unsigned int queue_count)
{
- struct netdev_queue *tx;
struct net_device *dev;
size_t alloc_size;
struct net_device *p;
-#ifdef CONFIG_RPS
- struct netdev_rx_queue *rx;
- int i;
-#endif
BUG_ON(strlen(name) >= sizeof(dev->name));
+ if (queue_count < 1) {
+ pr_err("alloc_netdev: Unable to allocate device "
+ "with zero queues.\n");
+ return NULL;
+ }
+
alloc_size = sizeof(struct net_device);
if (sizeof_priv) {
/* ensure 32-byte alignment of private area */
@@ -5416,55 +5564,31 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
return NULL;
}
- tx = kcalloc(queue_count, sizeof(struct netdev_queue), GFP_KERNEL);
- if (!tx) {
- printk(KERN_ERR "alloc_netdev: Unable to allocate "
- "tx qdiscs.\n");
- goto free_p;
- }
-
-#ifdef CONFIG_RPS
- rx = kcalloc(queue_count, sizeof(struct netdev_rx_queue), GFP_KERNEL);
- if (!rx) {
- printk(KERN_ERR "alloc_netdev: Unable to allocate "
- "rx queues.\n");
- goto free_tx;
- }
-
- atomic_set(&rx->count, queue_count);
-
- /*
- * Set a pointer to first element in the array which holds the
- * reference count.
- */
- for (i = 0; i < queue_count; i++)
- rx[i].first = rx;
-#endif
-
dev = PTR_ALIGN(p, NETDEV_ALIGN);
dev->padded = (char *)dev - (char *)p;
+ dev->pcpu_refcnt = alloc_percpu(int);
+ if (!dev->pcpu_refcnt)
+ goto free_p;
+
if (dev_addr_init(dev))
- goto free_rx;
+ goto free_pcpu;
dev_mc_init(dev);
dev_uc_init(dev);
dev_net_set(dev, &init_net);
- dev->_tx = tx;
dev->num_tx_queues = queue_count;
dev->real_num_tx_queues = queue_count;
#ifdef CONFIG_RPS
- dev->_rx = rx;
dev->num_rx_queues = queue_count;
+ dev->real_num_rx_queues = queue_count;
#endif
dev->gso_max_size = GSO_MAX_SIZE;
- netdev_init_queues(dev);
-
INIT_LIST_HEAD(&dev->ethtool_ntuple_list.list);
dev->ethtool_ntuple_list.count = 0;
INIT_LIST_HEAD(&dev->napi_list);
@@ -5475,12 +5599,8 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
strcpy(dev->name, name);
return dev;
-free_rx:
-#ifdef CONFIG_RPS
- kfree(rx);
-free_tx:
-#endif
- kfree(tx);
+free_pcpu:
+ free_percpu(dev->pcpu_refcnt);
free_p:
kfree(p);
return NULL;
@@ -5503,6 +5623,8 @@ void free_netdev(struct net_device *dev)
kfree(dev->_tx);
+ kfree(rcu_dereference_raw(dev->ingress_queue));
+
/* Flush device addresses */
dev_addr_flush(dev);
@@ -5512,6 +5634,9 @@ void free_netdev(struct net_device *dev)
list_for_each_entry_safe(p, n, &dev->napi_list, dev_list)
netif_napi_del(p);
+ free_percpu(dev->pcpu_refcnt);
+ dev->pcpu_refcnt = NULL;
+
/* Compatibility with error handling in drivers */
if (dev->reg_state == NETREG_UNINITIALIZED) {
kfree((char *)dev - dev->padded);
@@ -5666,6 +5791,10 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
/* Notify protocols, that we are about to destroy
this device. They should clean all the things.
+
+ Note that dev->reg_state stays at NETREG_REGISTERED.
+ This is wanted because this way 8021q and macvlan know
+ the device is just moving and can keep their slaves up.
*/
call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
call_netdevice_notifiers(NETDEV_UNREGISTER_BATCH, dev);
diff --git a/net/core/dst.c b/net/core/dst.c
index 6c41b1fac3d..8abe628b79f 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -168,7 +168,7 @@ void *dst_alloc(struct dst_ops *ops)
{
struct dst_entry *dst;
- if (ops->gc && atomic_read(&ops->entries) > ops->gc_thresh) {
+ if (ops->gc && dst_entries_get_fast(ops) > ops->gc_thresh) {
if (ops->gc(ops))
return NULL;
}
@@ -183,7 +183,7 @@ void *dst_alloc(struct dst_ops *ops)
#if RT_CACHE_DEBUG >= 2
atomic_inc(&dst_total);
#endif
- atomic_inc(&ops->entries);
+ dst_entries_add(ops, 1);
return dst;
}
EXPORT_SYMBOL(dst_alloc);
@@ -228,15 +228,15 @@ again:
child = dst->child;
dst->hh = NULL;
- if (hh && atomic_dec_and_test(&hh->hh_refcnt))
- kfree(hh);
+ if (hh)
+ hh_cache_put(hh);
if (neigh) {
dst->neighbour = NULL;
neigh_release(neigh);
}
- atomic_dec(&dst->ops->entries);
+ dst_entries_add(dst->ops, -1);
if (dst->ops->destroy)
dst->ops->destroy(dst);
@@ -271,13 +271,40 @@ void dst_release(struct dst_entry *dst)
if (dst) {
int newrefcnt;
- smp_mb__before_atomic_dec();
newrefcnt = atomic_dec_return(&dst->__refcnt);
WARN_ON(newrefcnt < 0);
+ if (unlikely(dst->flags & DST_NOCACHE) && !newrefcnt) {
+ dst = dst_destroy(dst);
+ if (dst)
+ __dst_free(dst);
+ }
}
}
EXPORT_SYMBOL(dst_release);
+/**
+ * skb_dst_set_noref - sets skb dst, without a reference
+ * @skb: buffer
+ * @dst: dst entry
+ *
+ * Sets skb dst, assuming a reference was not taken on dst
+ * skb_dst_drop() should not dst_release() this dst
+ */
+void skb_dst_set_noref(struct sk_buff *skb, struct dst_entry *dst)
+{
+ WARN_ON(!rcu_read_lock_held() && !rcu_read_lock_bh_held());
+ /* If dst not in cache, we must take a reference, because
+ * dst_release() will destroy dst as soon as its refcount becomes zero
+ */
+ if (unlikely(dst->flags & DST_NOCACHE)) {
+ dst_hold(dst);
+ skb_dst_set(skb, dst);
+ } else {
+ skb->_skb_refdst = (unsigned long)dst | SKB_DST_NOREF;
+ }
+}
+EXPORT_SYMBOL(skb_dst_set_noref);
+
/* Dirty hack. We did it in 2.2 (in __dst_free),
* we have _very_ good reasons not to repeat
* this mistake in 2.3, but we have no choice
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 8451ab48109..956a9f4971c 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -19,6 +19,7 @@
#include <linux/netdevice.h>
#include <linux/bitops.h>
#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
#include <linux/slab.h>
/*
@@ -131,7 +132,8 @@ EXPORT_SYMBOL(ethtool_op_set_ufo);
* NETIF_F_xxx values in include/linux/netdevice.h
*/
static const u32 flags_dup_features =
- (ETH_FLAG_LRO | ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH);
+ (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |
+ ETH_FLAG_RXHASH);
u32 ethtool_op_get_flags(struct net_device *dev)
{
@@ -205,18 +207,24 @@ static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo info;
const struct ethtool_ops *ops = dev->ethtool_ops;
- if (!ops->get_drvinfo)
- return -EOPNOTSUPP;
-
memset(&info, 0, sizeof(info));
info.cmd = ETHTOOL_GDRVINFO;
- ops->get_drvinfo(dev, &info);
+ if (ops && ops->get_drvinfo) {
+ ops->get_drvinfo(dev, &info);
+ } else if (dev->dev.parent && dev->dev.parent->driver) {
+ strlcpy(info.bus_info, dev_name(dev->dev.parent),
+ sizeof(info.bus_info));
+ strlcpy(info.driver, dev->dev.parent->driver->name,
+ sizeof(info.driver));
+ } else {
+ return -EOPNOTSUPP;
+ }
/*
* this method of obtaining string set info is deprecated;
* Use ETHTOOL_GSSET_INFO instead.
*/
- if (ops->get_sset_count) {
+ if (ops && ops->get_sset_count) {
int rc;
rc = ops->get_sset_count(dev, ETH_SS_TEST);
@@ -229,9 +237,9 @@ static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
if (rc >= 0)
info.n_priv_flags = rc;
}
- if (ops->get_regs_len)
+ if (ops && ops->get_regs_len)
info.regdump_len = ops->get_regs_len(dev);
- if (ops->get_eeprom_len)
+ if (ops && ops->get_eeprom_len)
info.eedump_len = ops->get_eeprom_len(dev);
if (copy_to_user(useraddr, &info, sizeof(info)))
@@ -479,6 +487,38 @@ static void __rx_ntuple_filter_add(struct ethtool_rx_ntuple_list *list,
list->count++;
}
+/*
+ * ethtool does not (or did not) set masks for flow parameters that are
+ * not specified, so if both value and mask are 0 then this must be
+ * treated as equivalent to a mask with all bits set. Implement that
+ * here rather than in drivers.
+ */
+static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
+{
+ struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
+ struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;
+
+ if (fs->flow_type != TCP_V4_FLOW &&
+ fs->flow_type != UDP_V4_FLOW &&
+ fs->flow_type != SCTP_V4_FLOW)
+ return;
+
+ if (!(entry->ip4src | mask->ip4src))
+ mask->ip4src = htonl(0xffffffff);
+ if (!(entry->ip4dst | mask->ip4dst))
+ mask->ip4dst = htonl(0xffffffff);
+ if (!(entry->psrc | mask->psrc))
+ mask->psrc = htons(0xffff);
+ if (!(entry->pdst | mask->pdst))
+ mask->pdst = htons(0xffff);
+ if (!(entry->tos | mask->tos))
+ mask->tos = 0xff;
+ if (!(fs->vlan_tag | fs->vlan_tag_mask))
+ fs->vlan_tag_mask = 0xffff;
+ if (!(fs->data | fs->data_mask))
+ fs->data_mask = 0xffffffffffffffffULL;
+}
+
static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
void __user *useraddr)
{
@@ -493,6 +533,8 @@ static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
return -EFAULT;
+ rx_ntuple_fix_masks(&cmd.fs);
+
/*
* Cache filter in dev struct for GET operation only if
* the underlying driver doesn't have its own GET operation, and
@@ -667,19 +709,19 @@ static int ethtool_get_rx_ntuple(struct net_device *dev, void __user *useraddr)
break;
case IP_USER_FLOW:
sprintf(p, "\tSrc IP addr: 0x%x\n",
- fsc->fs.h_u.raw_ip4_spec.ip4src);
+ fsc->fs.h_u.usr_ip4_spec.ip4src);
p += ETH_GSTRING_LEN;
num_strings++;
sprintf(p, "\tSrc IP mask: 0x%x\n",
- fsc->fs.m_u.raw_ip4_spec.ip4src);
+ fsc->fs.m_u.usr_ip4_spec.ip4src);
p += ETH_GSTRING_LEN;
num_strings++;
sprintf(p, "\tDest IP addr: 0x%x\n",
- fsc->fs.h_u.raw_ip4_spec.ip4dst);
+ fsc->fs.h_u.usr_ip4_spec.ip4dst);
p += ETH_GSTRING_LEN;
num_strings++;
sprintf(p, "\tDest IP mask: 0x%x\n",
- fsc->fs.m_u.raw_ip4_spec.ip4dst);
+ fsc->fs.m_u.usr_ip4_spec.ip4dst);
p += ETH_GSTRING_LEN;
num_strings++;
break;
@@ -775,7 +817,7 @@ static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
if (regs.len > reglen)
regs.len = reglen;
- regbuf = kzalloc(reglen, GFP_USER);
+ regbuf = vmalloc(reglen);
if (!regbuf)
return -ENOMEM;
@@ -790,7 +832,7 @@ static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
ret = 0;
out:
- kfree(regbuf);
+ vfree(regbuf);
return ret;
}
@@ -1175,8 +1217,11 @@ static int ethtool_set_gro(struct net_device *dev, char __user *useraddr)
return -EFAULT;
if (edata.data) {
- if (!dev->ethtool_ops->get_rx_csum ||
- !dev->ethtool_ops->get_rx_csum(dev))
+ u32 rxcsum = dev->ethtool_ops->get_rx_csum ?
+ dev->ethtool_ops->get_rx_csum(dev) :
+ ethtool_op_get_rx_csum(dev);
+
+ if (!rxcsum)
return -EINVAL;
dev->features |= NETIF_F_GRO;
} else
@@ -1402,14 +1447,22 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
if (!dev || !netif_device_present(dev))
return -ENODEV;
- if (!dev->ethtool_ops)
- return -EOPNOTSUPP;
-
if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
return -EFAULT;
+ if (!dev->ethtool_ops) {
+ /* ETHTOOL_GDRVINFO does not require any driver support.
+ * It is also unprivileged and does not change anything,
+ * so we can take a shortcut to it. */
+ if (ethcmd == ETHTOOL_GDRVINFO)
+ return ethtool_get_drvinfo(dev, useraddr);
+ else
+ return -EOPNOTSUPP;
+ }
+
/* Allow some commands to be done by anyone */
switch (ethcmd) {
+ case ETHTOOL_GSET:
case ETHTOOL_GDRVINFO:
case ETHTOOL_GMSGLVL:
case ETHTOOL_GCOALESCE:
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 42e84e08a1b..1bc3f253ba6 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -144,7 +144,7 @@ fib_rules_register(const struct fib_rules_ops *tmpl, struct net *net)
}
EXPORT_SYMBOL_GPL(fib_rules_register);
-void fib_rules_cleanup_ops(struct fib_rules_ops *ops)
+static void fib_rules_cleanup_ops(struct fib_rules_ops *ops)
{
struct fib_rule *rule, *tmp;
@@ -153,7 +153,6 @@ void fib_rules_cleanup_ops(struct fib_rules_ops *ops)
fib_rule_put(rule);
}
}
-EXPORT_SYMBOL_GPL(fib_rules_cleanup_ops);
static void fib_rules_put_rcu(struct rcu_head *head)
{
@@ -182,7 +181,8 @@ static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops,
{
int ret = 0;
- if (rule->iifindex && (rule->iifindex != fl->iif))
+ if (rule->iifindex && (rule->iifindex != fl->iif) &&
+ !(fl->flags & FLOWI_FLAG_MATCH_ANY_IIF))
goto out;
if (rule->oifindex && (rule->oifindex != fl->oif))
@@ -225,9 +225,12 @@ jumped:
err = ops->action(rule, fl, flags, arg);
if (err != -EAGAIN) {
- fib_rule_get(rule);
- arg->rule = rule;
- goto out;
+ if ((arg->flags & FIB_LOOKUP_NOREF) ||
+ likely(atomic_inc_not_zero(&rule->refcnt))) {
+ arg->rule = rule;
+ goto out;
+ }
+ break;
}
}
@@ -491,7 +494,6 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
}
}
- synchronize_rcu();
notify_rule_change(RTM_DELRULE, rule, ops, nlh,
NETLINK_CB(skb).pid);
fib_rule_put(rule);
diff --git a/net/core/filter.c b/net/core/filter.c
index 52b051f82a0..7adf5035291 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -638,10 +638,9 @@ int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk)
return err;
}
- rcu_read_lock_bh();
- old_fp = rcu_dereference_bh(sk->sk_filter);
+ old_fp = rcu_dereference_protected(sk->sk_filter,
+ sock_owned_by_user(sk));
rcu_assign_pointer(sk->sk_filter, fp);
- rcu_read_unlock_bh();
if (old_fp)
sk_filter_delayed_uncharge(sk, old_fp);
@@ -654,14 +653,13 @@ int sk_detach_filter(struct sock *sk)
int ret = -ENOENT;
struct sk_filter *filter;
- rcu_read_lock_bh();
- filter = rcu_dereference_bh(sk->sk_filter);
+ filter = rcu_dereference_protected(sk->sk_filter,
+ sock_owned_by_user(sk));
if (filter) {
rcu_assign_pointer(sk->sk_filter, NULL);
sk_filter_delayed_uncharge(sk, filter);
ret = 0;
}
- rcu_read_unlock_bh();
return ret;
}
EXPORT_SYMBOL_GPL(sk_detach_filter);
diff --git a/net/core/flow.c b/net/core/flow.c
index f67dcbfe54e..127c8a7ffd6 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -53,8 +53,7 @@ struct flow_flush_info {
struct flow_cache {
u32 hash_shift;
- unsigned long order;
- struct flow_cache_percpu *percpu;
+ struct flow_cache_percpu __percpu *percpu;
struct notifier_block hotcpu_notifier;
int low_watermark;
int high_watermark;
@@ -64,7 +63,7 @@ struct flow_cache {
atomic_t flow_cache_genid = ATOMIC_INIT(0);
EXPORT_SYMBOL(flow_cache_genid);
static struct flow_cache flow_cache_global;
-static struct kmem_cache *flow_cachep;
+static struct kmem_cache *flow_cachep __read_mostly;
static DEFINE_SPINLOCK(flow_cache_gc_lock);
static LIST_HEAD(flow_cache_gc_list);
@@ -177,15 +176,11 @@ static u32 flow_hash_code(struct flow_cache *fc,
{
u32 *k = (u32 *) key;
- return (jhash2(k, (sizeof(*key) / sizeof(u32)), fcp->hash_rnd)
- & (flow_cache_hash_size(fc) - 1));
+ return jhash2(k, (sizeof(*key) / sizeof(u32)), fcp->hash_rnd)
+ & (flow_cache_hash_size(fc) - 1);
}
-#if (BITS_PER_LONG == 64)
-typedef u64 flow_compare_t;
-#else
-typedef u32 flow_compare_t;
-#endif
+typedef unsigned long flow_compare_t;
/* I hear what you're saying, use memcmp. But memcmp cannot make
* important assumptions that we can here, such as alignment and
@@ -357,62 +352,73 @@ void flow_cache_flush(void)
put_online_cpus();
}
-static void __init flow_cache_cpu_prepare(struct flow_cache *fc,
- struct flow_cache_percpu *fcp)
+static int __cpuinit flow_cache_cpu_prepare(struct flow_cache *fc, int cpu)
{
- fcp->hash_table = (struct hlist_head *)
- __get_free_pages(GFP_KERNEL|__GFP_ZERO, fc->order);
- if (!fcp->hash_table)
- panic("NET: failed to allocate flow cache order %lu\n", fc->order);
+ struct flow_cache_percpu *fcp = per_cpu_ptr(fc->percpu, cpu);
+ size_t sz = sizeof(struct hlist_head) * flow_cache_hash_size(fc);
- fcp->hash_rnd_recalc = 1;
- fcp->hash_count = 0;
- tasklet_init(&fcp->flush_tasklet, flow_cache_flush_tasklet, 0);
+ if (!fcp->hash_table) {
+ fcp->hash_table = kzalloc_node(sz, GFP_KERNEL, cpu_to_node(cpu));
+ if (!fcp->hash_table) {
+ pr_err("NET: failed to allocate flow cache sz %zu\n", sz);
+ return -ENOMEM;
+ }
+ fcp->hash_rnd_recalc = 1;
+ fcp->hash_count = 0;
+ tasklet_init(&fcp->flush_tasklet, flow_cache_flush_tasklet, 0);
+ }
+ return 0;
}
-static int flow_cache_cpu(struct notifier_block *nfb,
+static int __cpuinit flow_cache_cpu(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{
struct flow_cache *fc = container_of(nfb, struct flow_cache, hotcpu_notifier);
- int cpu = (unsigned long) hcpu;
+ int res, cpu = (unsigned long) hcpu;
struct flow_cache_percpu *fcp = per_cpu_ptr(fc->percpu, cpu);
- if (action == CPU_DEAD || action == CPU_DEAD_FROZEN)
+ switch (action) {
+ case CPU_UP_PREPARE:
+ case CPU_UP_PREPARE_FROZEN:
+ res = flow_cache_cpu_prepare(fc, cpu);
+ if (res)
+ return notifier_from_errno(res);
+ break;
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
__flow_cache_shrink(fc, fcp, 0);
+ break;
+ }
return NOTIFY_OK;
}
-static int flow_cache_init(struct flow_cache *fc)
+static int __init flow_cache_init(struct flow_cache *fc)
{
- unsigned long order;
int i;
fc->hash_shift = 10;
fc->low_watermark = 2 * flow_cache_hash_size(fc);
fc->high_watermark = 4 * flow_cache_hash_size(fc);
- for (order = 0;
- (PAGE_SIZE << order) <
- (sizeof(struct hlist_head)*flow_cache_hash_size(fc));
- order++)
- /* NOTHING */;
- fc->order = order;
fc->percpu = alloc_percpu(struct flow_cache_percpu);
+ if (!fc->percpu)
+ return -ENOMEM;
- setup_timer(&fc->rnd_timer, flow_cache_new_hashrnd,
- (unsigned long) fc);
- fc->rnd_timer.expires = jiffies + FLOW_HASH_RND_PERIOD;
- add_timer(&fc->rnd_timer);
-
- for_each_possible_cpu(i)
- flow_cache_cpu_prepare(fc, per_cpu_ptr(fc->percpu, i));
-
+ for_each_online_cpu(i) {
+ if (flow_cache_cpu_prepare(fc, i))
+ return -ENOMEM;
+ }
fc->hotcpu_notifier = (struct notifier_block){
.notifier_call = flow_cache_cpu,
};
register_hotcpu_notifier(&fc->hotcpu_notifier);
+ setup_timer(&fc->rnd_timer, flow_cache_new_hashrnd,
+ (unsigned long) fc);
+ fc->rnd_timer.expires = jiffies + FLOW_HASH_RND_PERIOD;
+ add_timer(&fc->rnd_timer);
+
return 0;
}
diff --git a/net/core/gen_estimator.c b/net/core/gen_estimator.c
index 6743146e4d6..7c2373321b7 100644
--- a/net/core/gen_estimator.c
+++ b/net/core/gen_estimator.c
@@ -274,9 +274,9 @@ void gen_kill_estimator(struct gnet_stats_basic_packed *bstats,
while ((e = gen_find_node(bstats, rate_est))) {
rb_erase(&e->node, &est_root);
- write_lock_bh(&est_lock);
+ write_lock(&est_lock);
e->bstats = NULL;
- write_unlock_bh(&est_lock);
+ write_unlock(&est_lock);
list_del_rcu(&e->list);
call_rcu(&e->e_rcu, __gen_kill_estimator);
diff --git a/net/core/iovec.c b/net/core/iovec.c
index e6b133b77cc..72aceb1fe4f 100644
--- a/net/core/iovec.c
+++ b/net/core/iovec.c
@@ -42,7 +42,9 @@ long verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address,
if (m->msg_namelen) {
if (mode == VERIFY_READ) {
- err = move_addr_to_kernel(m->msg_name, m->msg_namelen,
+ void __user *namep;
+ namep = (void __user __force *) m->msg_name;
+ err = move_addr_to_kernel(namep, m->msg_namelen,
address);
if (err < 0)
return err;
@@ -53,7 +55,7 @@ long verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address,
}
size = m->msg_iovlen * sizeof(struct iovec);
- if (copy_from_user(iov, m->msg_iov, size))
+ if (copy_from_user(iov, (void __user __force *) m->msg_iov, size))
return -EFAULT;
m->msg_iov = iov;
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index a4e0a7482c2..8cc8f9a79db 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -122,7 +122,7 @@ static void neigh_cleanup_and_release(struct neighbour *neigh)
unsigned long neigh_rand_reach_time(unsigned long base)
{
- return (base ? (net_random() % base) + (base >> 1) : 0);
+ return base ? (net_random() % base) + (base >> 1) : 0;
}
EXPORT_SYMBOL(neigh_rand_reach_time);
@@ -131,15 +131,20 @@ static int neigh_forced_gc(struct neigh_table *tbl)
{
int shrunk = 0;
int i;
+ struct neigh_hash_table *nht;
NEIGH_CACHE_STAT_INC(tbl, forced_gc_runs);
write_lock_bh(&tbl->lock);
- for (i = 0; i <= tbl->hash_mask; i++) {
- struct neighbour *n, **np;
+ nht = rcu_dereference_protected(tbl->nht,
+ lockdep_is_held(&tbl->lock));
+ for (i = 0; i <= nht->hash_mask; i++) {
+ struct neighbour *n;
+ struct neighbour __rcu **np;
- np = &tbl->hash_buckets[i];
- while ((n = *np) != NULL) {
+ np = &nht->hash_buckets[i];
+ while ((n = rcu_dereference_protected(*np,
+ lockdep_is_held(&tbl->lock))) != NULL) {
/* Neighbour record may be discarded if:
* - nobody refers to it.
* - it is not permanent
@@ -147,7 +152,9 @@ static int neigh_forced_gc(struct neigh_table *tbl)
write_lock(&n->lock);
if (atomic_read(&n->refcnt) == 1 &&
!(n->nud_state & NUD_PERMANENT)) {
- *np = n->next;
+ rcu_assign_pointer(*np,
+ rcu_dereference_protected(n->next,
+ lockdep_is_held(&tbl->lock)));
n->dead = 1;
shrunk = 1;
write_unlock(&n->lock);
@@ -199,16 +206,24 @@ static void pneigh_queue_purge(struct sk_buff_head *list)
static void neigh_flush_dev(struct neigh_table *tbl, struct net_device *dev)
{
int i;
+ struct neigh_hash_table *nht;
- for (i = 0; i <= tbl->hash_mask; i++) {
- struct neighbour *n, **np = &tbl->hash_buckets[i];
+ nht = rcu_dereference_protected(tbl->nht,
+ lockdep_is_held(&tbl->lock));
- while ((n = *np) != NULL) {
+ for (i = 0; i <= nht->hash_mask; i++) {
+ struct neighbour *n;
+ struct neighbour __rcu **np = &nht->hash_buckets[i];
+
+ while ((n = rcu_dereference_protected(*np,
+ lockdep_is_held(&tbl->lock))) != NULL) {
if (dev && n->dev != dev) {
np = &n->next;
continue;
}
- *np = n->next;
+ rcu_assign_pointer(*np,
+ rcu_dereference_protected(n->next,
+ lockdep_is_held(&tbl->lock)));
write_lock(&n->lock);
neigh_del_timer(n);
n->dead = 1;
@@ -279,6 +294,7 @@ static struct neighbour *neigh_alloc(struct neigh_table *tbl)
skb_queue_head_init(&n->arp_queue);
rwlock_init(&n->lock);
+ seqlock_init(&n->ha_lock);
n->updated = n->used = now;
n->nud_state = NUD_NONE;
n->output = neigh_blackhole;
@@ -297,64 +313,86 @@ out_entries:
goto out;
}
-static struct neighbour **neigh_hash_alloc(unsigned int entries)
+static struct neigh_hash_table *neigh_hash_alloc(unsigned int entries)
{
- unsigned long size = entries * sizeof(struct neighbour *);
- struct neighbour **ret;
+ size_t size = entries * sizeof(struct neighbour *);
+ struct neigh_hash_table *ret;
+ struct neighbour **buckets;
- if (size <= PAGE_SIZE) {
- ret = kzalloc(size, GFP_ATOMIC);
- } else {
- ret = (struct neighbour **)
- __get_free_pages(GFP_ATOMIC|__GFP_ZERO, get_order(size));
+ ret = kmalloc(sizeof(*ret), GFP_ATOMIC);
+ if (!ret)
+ return NULL;
+ if (size <= PAGE_SIZE)
+ buckets = kzalloc(size, GFP_ATOMIC);
+ else
+ buckets = (struct neighbour **)
+ __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_mask = entries - 1;
+ get_random_bytes(&ret->hash_rnd, sizeof(ret->hash_rnd));
return ret;
}
-static void neigh_hash_free(struct neighbour **hash, unsigned int entries)
+static void neigh_hash_free_rcu(struct rcu_head *head)
{
- unsigned long size = entries * sizeof(struct neighbour *);
+ struct neigh_hash_table *nht = container_of(head,
+ struct neigh_hash_table,
+ rcu);
+ size_t size = (nht->hash_mask + 1) * sizeof(struct neighbour *);
+ struct neighbour **buckets = nht->hash_buckets;
if (size <= PAGE_SIZE)
- kfree(hash);
+ kfree(buckets);
else
- free_pages((unsigned long)hash, get_order(size));
+ free_pages((unsigned long)buckets, get_order(size));
+ kfree(nht);
}
-static void neigh_hash_grow(struct neigh_table *tbl, unsigned long new_entries)
+static struct neigh_hash_table *neigh_hash_grow(struct neigh_table *tbl,
+ unsigned long new_entries)
{
- struct neighbour **new_hash, **old_hash;
- unsigned int i, new_hash_mask, old_entries;
+ unsigned int i, hash;
+ struct neigh_hash_table *new_nht, *old_nht;
NEIGH_CACHE_STAT_INC(tbl, hash_grows);
BUG_ON(!is_power_of_2(new_entries));
- new_hash = neigh_hash_alloc(new_entries);
- if (!new_hash)
- return;
-
- old_entries = tbl->hash_mask + 1;
- new_hash_mask = new_entries - 1;
- old_hash = tbl->hash_buckets;
+ old_nht = rcu_dereference_protected(tbl->nht,
+ lockdep_is_held(&tbl->lock));
+ new_nht = neigh_hash_alloc(new_entries);
+ if (!new_nht)
+ return old_nht;
- get_random_bytes(&tbl->hash_rnd, sizeof(tbl->hash_rnd));
- for (i = 0; i < old_entries; i++) {
+ for (i = 0; i <= old_nht->hash_mask; i++) {
struct neighbour *n, *next;
- for (n = old_hash[i]; n; n = next) {
- unsigned int hash_val = tbl->hash(n->primary_key, n->dev);
-
- hash_val &= new_hash_mask;
- next = n->next;
-
- n->next = new_hash[hash_val];
- new_hash[hash_val] = n;
+ for (n = rcu_dereference_protected(old_nht->hash_buckets[i],
+ lockdep_is_held(&tbl->lock));
+ n != NULL;
+ n = next) {
+ hash = tbl->hash(n->primary_key, n->dev,
+ new_nht->hash_rnd);
+
+ hash &= new_nht->hash_mask;
+ next = rcu_dereference_protected(n->next,
+ lockdep_is_held(&tbl->lock));
+
+ rcu_assign_pointer(n->next,
+ rcu_dereference_protected(
+ new_nht->hash_buckets[hash],
+ lockdep_is_held(&tbl->lock)));
+ rcu_assign_pointer(new_nht->hash_buckets[hash], n);
}
}
- tbl->hash_buckets = new_hash;
- tbl->hash_mask = new_hash_mask;
- neigh_hash_free(old_hash, old_entries);
+ rcu_assign_pointer(tbl->nht, new_nht);
+ call_rcu(&old_nht->rcu, neigh_hash_free_rcu);
+ return new_nht;
}
struct neighbour *neigh_lookup(struct neigh_table *tbl, const void *pkey,
@@ -363,19 +401,26 @@ struct neighbour *neigh_lookup(struct neigh_table *tbl, const void *pkey,
struct neighbour *n;
int key_len = tbl->key_len;
u32 hash_val;
+ struct neigh_hash_table *nht;
NEIGH_CACHE_STAT_INC(tbl, lookups);
- read_lock_bh(&tbl->lock);
- hash_val = tbl->hash(pkey, dev);
- for (n = tbl->hash_buckets[hash_val & tbl->hash_mask]; n; n = n->next) {
+ rcu_read_lock_bh();
+ nht = rcu_dereference_bh(tbl->nht);
+ hash_val = tbl->hash(pkey, dev, nht->hash_rnd) & nht->hash_mask;
+
+ for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]);
+ n != NULL;
+ n = rcu_dereference_bh(n->next)) {
if (dev == n->dev && !memcmp(n->primary_key, pkey, key_len)) {
- neigh_hold(n);
+ if (!atomic_inc_not_zero(&n->refcnt))
+ n = NULL;
NEIGH_CACHE_STAT_INC(tbl, hits);
break;
}
}
- read_unlock_bh(&tbl->lock);
+
+ rcu_read_unlock_bh();
return n;
}
EXPORT_SYMBOL(neigh_lookup);
@@ -386,20 +431,27 @@ struct neighbour *neigh_lookup_nodev(struct neigh_table *tbl, struct net *net,
struct neighbour *n;
int key_len = tbl->key_len;
u32 hash_val;
+ struct neigh_hash_table *nht;
NEIGH_CACHE_STAT_INC(tbl, lookups);
- read_lock_bh(&tbl->lock);
- hash_val = tbl->hash(pkey, NULL);
- for (n = tbl->hash_buckets[hash_val & tbl->hash_mask]; n; n = n->next) {
+ rcu_read_lock_bh();
+ nht = rcu_dereference_bh(tbl->nht);
+ hash_val = tbl->hash(pkey, NULL, nht->hash_rnd) & nht->hash_mask;
+
+ for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]);
+ n != NULL;
+ n = rcu_dereference_bh(n->next)) {
if (!memcmp(n->primary_key, pkey, key_len) &&
net_eq(dev_net(n->dev), net)) {
- neigh_hold(n);
+ if (!atomic_inc_not_zero(&n->refcnt))
+ n = NULL;
NEIGH_CACHE_STAT_INC(tbl, hits);
break;
}
}
- read_unlock_bh(&tbl->lock);
+
+ rcu_read_unlock_bh();
return n;
}
EXPORT_SYMBOL(neigh_lookup_nodev);
@@ -411,6 +463,7 @@ struct neighbour *neigh_create(struct neigh_table *tbl, const void *pkey,
int key_len = tbl->key_len;
int error;
struct neighbour *n1, *rc, *n = neigh_alloc(tbl);
+ struct neigh_hash_table *nht;
if (!n) {
rc = ERR_PTR(-ENOBUFS);
@@ -437,18 +490,24 @@ struct neighbour *neigh_create(struct neigh_table *tbl, const void *pkey,
n->confirmed = jiffies - (n->parms->base_reachable_time << 1);
write_lock_bh(&tbl->lock);
+ nht = rcu_dereference_protected(tbl->nht,
+ lockdep_is_held(&tbl->lock));
- if (atomic_read(&tbl->entries) > (tbl->hash_mask + 1))
- neigh_hash_grow(tbl, (tbl->hash_mask + 1) << 1);
+ if (atomic_read(&tbl->entries) > (nht->hash_mask + 1))
+ nht = neigh_hash_grow(tbl, (nht->hash_mask + 1) << 1);
- hash_val = tbl->hash(pkey, dev) & tbl->hash_mask;
+ hash_val = tbl->hash(pkey, dev, nht->hash_rnd) & nht->hash_mask;
if (n->parms->dead) {
rc = ERR_PTR(-EINVAL);
goto out_tbl_unlock;
}
- for (n1 = tbl->hash_buckets[hash_val]; n1; n1 = n1->next) {
+ for (n1 = rcu_dereference_protected(nht->hash_buckets[hash_val],
+ lockdep_is_held(&tbl->lock));
+ n1 != NULL;
+ n1 = rcu_dereference_protected(n1->next,
+ lockdep_is_held(&tbl->lock))) {
if (dev == n1->dev && !memcmp(n1->primary_key, pkey, key_len)) {
neigh_hold(n1);
rc = n1;
@@ -456,10 +515,12 @@ struct neighbour *neigh_create(struct neigh_table *tbl, const void *pkey,
}
}
- n->next = tbl->hash_buckets[hash_val];
- tbl->hash_buckets[hash_val] = n;
n->dead = 0;
neigh_hold(n);
+ rcu_assign_pointer(n->next,
+ rcu_dereference_protected(nht->hash_buckets[hash_val],
+ lockdep_is_held(&tbl->lock)));
+ rcu_assign_pointer(nht->hash_buckets[hash_val], n);
write_unlock_bh(&tbl->lock);
NEIGH_PRINTK2("neigh %p is created.\n", n);
rc = n;
@@ -616,6 +677,12 @@ static inline void neigh_parms_put(struct neigh_parms *parms)
neigh_parms_destroy(parms);
}
+static void neigh_destroy_rcu(struct rcu_head *head)
+{
+ struct neighbour *neigh = container_of(head, struct neighbour, rcu);
+
+ kmem_cache_free(neigh->tbl->kmem_cachep, neigh);
+}
/*
* neighbour must already be out of the table;
*
@@ -643,8 +710,7 @@ void neigh_destroy(struct neighbour *neigh)
write_seqlock_bh(&hh->hh_lock);
hh->hh_output = neigh_blackhole;
write_sequnlock_bh(&hh->hh_lock);
- if (atomic_dec_and_test(&hh->hh_refcnt))
- kfree(hh);
+ hh_cache_put(hh);
}
skb_queue_purge(&neigh->arp_queue);
@@ -655,7 +721,7 @@ void neigh_destroy(struct neighbour *neigh)
NEIGH_PRINTK2("neigh %p is destroyed.\n", neigh);
atomic_dec(&neigh->tbl->entries);
- kmem_cache_free(neigh->tbl->kmem_cachep, neigh);
+ call_rcu(&neigh->rcu, neigh_destroy_rcu);
}
EXPORT_SYMBOL(neigh_destroy);
@@ -696,12 +762,16 @@ static void neigh_connect(struct neighbour *neigh)
static void neigh_periodic_work(struct work_struct *work)
{
struct neigh_table *tbl = container_of(work, struct neigh_table, gc_work.work);
- struct neighbour *n, **np;
+ struct neighbour *n;
+ struct neighbour __rcu **np;
unsigned int i;
+ struct neigh_hash_table *nht;
NEIGH_CACHE_STAT_INC(tbl, periodic_gc_runs);
write_lock_bh(&tbl->lock);
+ nht = rcu_dereference_protected(tbl->nht,
+ lockdep_is_held(&tbl->lock));
/*
* periodically recompute ReachableTime from random function
@@ -715,10 +785,11 @@ static void neigh_periodic_work(struct work_struct *work)
neigh_rand_reach_time(p->base_reachable_time);
}
- for (i = 0 ; i <= tbl->hash_mask; i++) {
- np = &tbl->hash_buckets[i];
+ for (i = 0 ; i <= nht->hash_mask; i++) {
+ np = &nht->hash_buckets[i];
- while ((n = *np) != NULL) {
+ while ((n = rcu_dereference_protected(*np,
+ lockdep_is_held(&tbl->lock))) != NULL) {
unsigned int state;
write_lock(&n->lock);
@@ -766,9 +837,9 @@ next_elt:
static __inline__ int neigh_max_probes(struct neighbour *n)
{
struct neigh_parms *p = n->parms;
- return (n->nud_state & NUD_PROBE ?
+ return (n->nud_state & NUD_PROBE) ?
p->ucast_probes :
- p->ucast_probes + p->app_probes + p->mcast_probes);
+ p->ucast_probes + p->app_probes + p->mcast_probes;
}
static void neigh_invalidate(struct neighbour *neigh)
@@ -945,7 +1016,7 @@ out_unlock_bh:
}
EXPORT_SYMBOL(__neigh_event_send);
-static void neigh_update_hhs(struct neighbour *neigh)
+static void neigh_update_hhs(const struct neighbour *neigh)
{
struct hh_cache *hh;
void (*update)(struct hh_cache*, const struct net_device*, const unsigned char *)
@@ -1081,7 +1152,9 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
}
if (lladdr != neigh->ha) {
+ write_seqlock(&neigh->ha_lock);
memcpy(&neigh->ha, lladdr, dev->addr_len);
+ write_sequnlock(&neigh->ha_lock);
neigh_update_hhs(neigh);
if (!(new & NUD_CONNECTED))
neigh->confirmed = jiffies -
@@ -1139,44 +1212,73 @@ struct neighbour *neigh_event_ns(struct neigh_table *tbl,
}
EXPORT_SYMBOL(neigh_event_ns);
+static inline bool neigh_hh_lookup(struct neighbour *n, struct dst_entry *dst,
+ __be16 protocol)
+{
+ struct hh_cache *hh;
+
+ smp_rmb(); /* paired with smp_wmb() in neigh_hh_init() */
+ for (hh = n->hh; hh; hh = hh->hh_next) {
+ if (hh->hh_type == protocol) {
+ atomic_inc(&hh->hh_refcnt);
+ if (unlikely(cmpxchg(&dst->hh, NULL, hh) != NULL))
+ hh_cache_put(hh);
+ return true;
+ }
+ }
+ return false;
+}
+
+/* called with read_lock_bh(&n->lock); */
static void neigh_hh_init(struct neighbour *n, struct dst_entry *dst,
__be16 protocol)
{
struct hh_cache *hh;
struct net_device *dev = dst->dev;
- for (hh = n->hh; hh; hh = hh->hh_next)
- if (hh->hh_type == protocol)
- break;
+ if (likely(neigh_hh_lookup(n, dst, protocol)))
+ return;
- if (!hh && (hh = kzalloc(sizeof(*hh), GFP_ATOMIC)) != NULL) {
- seqlock_init(&hh->hh_lock);
- hh->hh_type = protocol;
- atomic_set(&hh->hh_refcnt, 0);
- hh->hh_next = NULL;
+ /* slow path */
+ hh = kzalloc(sizeof(*hh), GFP_ATOMIC);
+ if (!hh)
+ return;
- if (dev->header_ops->cache(n, hh)) {
- kfree(hh);
- hh = NULL;
- } else {
- atomic_inc(&hh->hh_refcnt);
- hh->hh_next = n->hh;
- n->hh = hh;
- if (n->nud_state & NUD_CONNECTED)
- hh->hh_output = n->ops->hh_output;
- else
- hh->hh_output = n->ops->output;
- }
+ seqlock_init(&hh->hh_lock);
+ hh->hh_type = protocol;
+ atomic_set(&hh->hh_refcnt, 2);
+
+ if (dev->header_ops->cache(n, hh)) {
+ kfree(hh);
+ return;
}
- if (hh) {
- atomic_inc(&hh->hh_refcnt);
- dst->hh = hh;
+
+ write_lock_bh(&n->lock);
+
+ /* must check if another thread already did the insert */
+ if (neigh_hh_lookup(n, dst, protocol)) {
+ kfree(hh);
+ goto end;
}
+
+ if (n->nud_state & NUD_CONNECTED)
+ hh->hh_output = n->ops->hh_output;
+ else
+ hh->hh_output = n->ops->output;
+
+ hh->hh_next = n->hh;
+ smp_wmb(); /* paired with smp_rmb() in neigh_hh_lookup() */
+ n->hh = hh;
+
+ if (unlikely(cmpxchg(&dst->hh, NULL, hh) != NULL))
+ hh_cache_put(hh);
+end:
+ write_unlock_bh(&n->lock);
}
/* This function can be used in contexts, where only old dev_queue_xmit
- worked, f.e. if you want to override normal output path (eql, shaper),
- but resolution is not made yet.
+ * worked, f.e. if you want to override normal output path (eql, shaper),
+ * but resolution is not made yet.
*/
int neigh_compat_output(struct sk_buff *skb)
@@ -1210,19 +1312,19 @@ int neigh_resolve_output(struct sk_buff *skb)
if (!neigh_event_send(neigh, skb)) {
int err;
struct net_device *dev = neigh->dev;
- if (dev->header_ops->cache && !dst->hh) {
- write_lock_bh(&neigh->lock);
- if (!dst->hh)
- neigh_hh_init(neigh, dst, dst->ops->protocol);
- err = dev_hard_header(skb, dev, ntohs(skb->protocol),
- neigh->ha, NULL, skb->len);
- write_unlock_bh(&neigh->lock);
- } else {
- read_lock_bh(&neigh->lock);
+ unsigned int seq;
+
+ if (dev->header_ops->cache &&
+ !dst->hh &&
+ !(dst->flags & DST_NOCACHE))
+ neigh_hh_init(neigh, dst, dst->ops->protocol);
+
+ do {
+ seq = read_seqbegin(&neigh->ha_lock);
err = dev_hard_header(skb, dev, ntohs(skb->protocol),
neigh->ha, NULL, skb->len);
- read_unlock_bh(&neigh->lock);
- }
+ } while (read_seqretry(&neigh->ha_lock, seq));
+
if (err >= 0)
rc = neigh->ops->queue_xmit(skb);
else
@@ -1248,13 +1350,16 @@ int neigh_connected_output(struct sk_buff *skb)
struct dst_entry *dst = skb_dst(skb);
struct neighbour *neigh = dst->neighbour;
struct net_device *dev = neigh->dev;
+ unsigned int seq;
__skb_pull(skb, skb_network_offset(skb));
- read_lock_bh(&neigh->lock);
- err = dev_hard_header(skb, dev, ntohs(skb->protocol),
- neigh->ha, NULL, skb->len);
- read_unlock_bh(&neigh->lock);
+ do {
+ seq = read_seqbegin(&neigh->ha_lock);
+ err = dev_hard_header(skb, dev, ntohs(skb->protocol),
+ neigh->ha, NULL, skb->len);
+ } while (read_seqretry(&neigh->ha_lock, seq));
+
if (err >= 0)
err = neigh->ops->queue_xmit(skb);
else {
@@ -1436,17 +1541,14 @@ void neigh_table_init_no_netlink(struct neigh_table *tbl)
panic("cannot create neighbour proc dir entry");
#endif
- tbl->hash_mask = 1;
- tbl->hash_buckets = neigh_hash_alloc(tbl->hash_mask + 1);
+ tbl->nht = neigh_hash_alloc(8);
phsize = (PNEIGH_HASHMASK + 1) * sizeof(struct pneigh_entry *);
tbl->phash_buckets = kzalloc(phsize, GFP_KERNEL);
- if (!tbl->hash_buckets || !tbl->phash_buckets)
+ if (!tbl->nht || !tbl->phash_buckets)
panic("cannot allocate neighbour cache hashes");
- get_random_bytes(&tbl->hash_rnd, sizeof(tbl->hash_rnd));
-
rwlock_init(&tbl->lock);
INIT_DELAYED_WORK_DEFERRABLE(&tbl->gc_work, neigh_periodic_work);
schedule_delayed_work(&tbl->gc_work, tbl->parms.reachable_time);
@@ -1486,8 +1588,7 @@ int neigh_table_clear(struct neigh_table *tbl)
struct neigh_table **tp;
/* It is not clean... Fix it to unload IPv6 module safely */
- cancel_delayed_work(&tbl->gc_work);
- flush_scheduled_work();
+ cancel_delayed_work_sync(&tbl->gc_work);
del_timer_sync(&tbl->proxy_timer);
pneigh_queue_purge(&tbl->proxy_queue);
neigh_ifdown(tbl, NULL);
@@ -1502,8 +1603,8 @@ int neigh_table_clear(struct neigh_table *tbl)
}
write_unlock(&neigh_tbl_lock);
- neigh_hash_free(tbl->hash_buckets, tbl->hash_mask + 1);
- tbl->hash_buckets = NULL;
+ call_rcu(&tbl->nht->rcu, neigh_hash_free_rcu);
+ tbl->nht = NULL;
kfree(tbl->phash_buckets);
tbl->phash_buckets = NULL;
@@ -1529,6 +1630,7 @@ static int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
struct net_device *dev = NULL;
int err = -EINVAL;
+ ASSERT_RTNL();
if (nlmsg_len(nlh) < sizeof(*ndm))
goto out;
@@ -1538,7 +1640,7 @@ static int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
ndm = nlmsg_data(nlh);
if (ndm->ndm_ifindex) {
- dev = dev_get_by_index(net, ndm->ndm_ifindex);
+ dev = __dev_get_by_index(net, ndm->ndm_ifindex);
if (dev == NULL) {
err = -ENODEV;
goto out;
@@ -1554,34 +1656,31 @@ static int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
read_unlock(&neigh_tbl_lock);
if (nla_len(dst_attr) < tbl->key_len)
- goto out_dev_put;
+ goto out;
if (ndm->ndm_flags & NTF_PROXY) {
err = pneigh_delete(tbl, net, nla_data(dst_attr), dev);
- goto out_dev_put;
+ goto out;
}
if (dev == NULL)
- goto out_dev_put;
+ goto out;
neigh = neigh_lookup(tbl, nla_data(dst_attr), dev);
if (neigh == NULL) {
err = -ENOENT;
- goto out_dev_put;
+ goto out;
}
err = neigh_update(neigh, NULL, NUD_FAILED,
NEIGH_UPDATE_F_OVERRIDE |
NEIGH_UPDATE_F_ADMIN);
neigh_release(neigh);
- goto out_dev_put;
+ goto out;
}
read_unlock(&neigh_tbl_lock);
err = -EAFNOSUPPORT;
-out_dev_put:
- if (dev)
- dev_put(dev);
out:
return err;
}
@@ -1595,6 +1694,7 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
struct net_device *dev = NULL;
int err;
+ ASSERT_RTNL();
err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
if (err < 0)
goto out;
@@ -1605,14 +1705,14 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
ndm = nlmsg_data(nlh);
if (ndm->ndm_ifindex) {
- dev = dev_get_by_index(net, ndm->ndm_ifindex);
+ dev = __dev_get_by_index(net, ndm->ndm_ifindex);
if (dev == NULL) {
err = -ENODEV;
goto out;
}
if (tb[NDA_LLADDR] && nla_len(tb[NDA_LLADDR]) < dev->addr_len)
- goto out_dev_put;
+ goto out;
}
read_lock(&neigh_tbl_lock);
@@ -1626,7 +1726,7 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
read_unlock(&neigh_tbl_lock);
if (nla_len(tb[NDA_DST]) < tbl->key_len)
- goto out_dev_put;
+ goto out;
dst = nla_data(tb[NDA_DST]);
lladdr = tb[NDA_LLADDR] ? nla_data(tb[NDA_LLADDR]) : NULL;
@@ -1639,29 +1739,29 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
pn->flags = ndm->ndm_flags;
err = 0;
}
- goto out_dev_put;
+ goto out;
}
if (dev == NULL)
- goto out_dev_put;
+ goto out;
neigh = neigh_lookup(tbl, dst, dev);
if (neigh == NULL) {
if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
err = -ENOENT;
- goto out_dev_put;
+ goto out;
}
neigh = __neigh_lookup_errno(tbl, dst, dev);
if (IS_ERR(neigh)) {
err = PTR_ERR(neigh);
- goto out_dev_put;
+ goto out;
}
} else {
if (nlh->nlmsg_flags & NLM_F_EXCL) {
err = -EEXIST;
neigh_release(neigh);
- goto out_dev_put;
+ goto out;
}
if (!(nlh->nlmsg_flags & NLM_F_REPLACE))
@@ -1674,15 +1774,11 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
} else
err = neigh_update(neigh, lladdr, ndm->ndm_state, flags);
neigh_release(neigh);
- goto out_dev_put;
+ goto out;
}
read_unlock(&neigh_tbl_lock);
err = -EAFNOSUPPORT;
-
-out_dev_put:
- if (dev)
- dev_put(dev);
out:
return err;
}
@@ -1748,18 +1844,22 @@ static int neightbl_fill_info(struct sk_buff *skb, struct neigh_table *tbl,
unsigned long now = jiffies;
unsigned int flush_delta = now - tbl->last_flush;
unsigned int rand_delta = now - tbl->last_rand;
-
+ struct neigh_hash_table *nht;
struct ndt_config ndc = {
.ndtc_key_len = tbl->key_len,
.ndtc_entry_size = tbl->entry_size,
.ndtc_entries = atomic_read(&tbl->entries),
.ndtc_last_flush = jiffies_to_msecs(flush_delta),
.ndtc_last_rand = jiffies_to_msecs(rand_delta),
- .ndtc_hash_rnd = tbl->hash_rnd,
- .ndtc_hash_mask = tbl->hash_mask,
.ndtc_proxy_qlen = tbl->proxy_queue.qlen,
};
+ rcu_read_lock_bh();
+ nht = rcu_dereference_bh(tbl->nht);
+ ndc.ndtc_hash_rnd = nht->hash_rnd;
+ ndc.ndtc_hash_mask = nht->hash_mask;
+ rcu_read_unlock_bh();
+
NLA_PUT(skb, NDTA_CONFIG, sizeof(ndc), &ndc);
}
@@ -2056,10 +2156,14 @@ static int neigh_fill_info(struct sk_buff *skb, struct neighbour *neigh,
read_lock_bh(&neigh->lock);
ndm->ndm_state = neigh->nud_state;
- if ((neigh->nud_state & NUD_VALID) &&
- nla_put(skb, NDA_LLADDR, neigh->dev->addr_len, neigh->ha) < 0) {
- read_unlock_bh(&neigh->lock);
- goto nla_put_failure;
+ if (neigh->nud_state & NUD_VALID) {
+ char haddr[MAX_ADDR_LEN];
+
+ neigh_ha_snapshot(haddr, neigh, neigh->dev);
+ if (nla_put(skb, NDA_LLADDR, neigh->dev->addr_len, haddr) < 0) {
+ read_unlock_bh(&neigh->lock);
+ goto nla_put_failure;
+ }
}
ci.ndm_used = jiffies_to_clock_t(now - neigh->used);
@@ -2087,18 +2191,23 @@ static void neigh_update_notify(struct neighbour *neigh)
static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
struct netlink_callback *cb)
{
- struct net * net = sock_net(skb->sk);
+ struct net *net = sock_net(skb->sk);
struct neighbour *n;
int rc, h, s_h = cb->args[1];
int idx, s_idx = idx = cb->args[2];
+ struct neigh_hash_table *nht;
- read_lock_bh(&tbl->lock);
- for (h = 0; h <= tbl->hash_mask; h++) {
+ rcu_read_lock_bh();
+ nht = rcu_dereference_bh(tbl->nht);
+
+ for (h = 0; h <= nht->hash_mask; h++) {
if (h < s_h)
continue;
if (h > s_h)
s_idx = 0;
- for (n = tbl->hash_buckets[h], idx = 0; n; n = n->next) {
+ for (n = rcu_dereference_bh(nht->hash_buckets[h]), idx = 0;
+ n != NULL;
+ n = rcu_dereference_bh(n->next)) {
if (!net_eq(dev_net(n->dev), net))
continue;
if (idx < s_idx)
@@ -2107,17 +2216,16 @@ static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
cb->nlh->nlmsg_seq,
RTM_NEWNEIGH,
NLM_F_MULTI) <= 0) {
- read_unlock_bh(&tbl->lock);
rc = -1;
goto out;
}
- next:
+next:
idx++;
}
}
- read_unlock_bh(&tbl->lock);
rc = skb->len;
out:
+ rcu_read_unlock_bh();
cb->args[1] = h;
cb->args[2] = idx;
return rc;
@@ -2150,15 +2258,22 @@ static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
void neigh_for_each(struct neigh_table *tbl, void (*cb)(struct neighbour *, void *), void *cookie)
{
int chain;
+ struct neigh_hash_table *nht;
- read_lock_bh(&tbl->lock);
- for (chain = 0; chain <= tbl->hash_mask; chain++) {
+ rcu_read_lock_bh();
+ nht = rcu_dereference_bh(tbl->nht);
+
+ read_lock(&tbl->lock); /* avoid resizes */
+ for (chain = 0; chain <= nht->hash_mask; chain++) {
struct neighbour *n;
- for (n = tbl->hash_buckets[chain]; n; n = n->next)
+ for (n = rcu_dereference_bh(nht->hash_buckets[chain]);
+ n != NULL;
+ n = rcu_dereference_bh(n->next))
cb(n, cookie);
}
- read_unlock_bh(&tbl->lock);
+ read_unlock(&tbl->lock);
+ rcu_read_unlock_bh();
}
EXPORT_SYMBOL(neigh_for_each);
@@ -2167,18 +2282,25 @@ void __neigh_for_each_release(struct neigh_table *tbl,
int (*cb)(struct neighbour *))
{
int chain;
+ struct neigh_hash_table *nht;
- for (chain = 0; chain <= tbl->hash_mask; chain++) {
- struct neighbour *n, **np;
+ nht = rcu_dereference_protected(tbl->nht,
+ lockdep_is_held(&tbl->lock));
+ for (chain = 0; chain <= nht->hash_mask; chain++) {
+ struct neighbour *n;
+ struct neighbour __rcu **np;
- np = &tbl->hash_buckets[chain];
- while ((n = *np) != NULL) {
+ np = &nht->hash_buckets[chain];
+ while ((n = rcu_dereference_protected(*np,
+ lockdep_is_held(&tbl->lock))) != NULL) {
int release;
write_lock(&n->lock);
release = cb(n);
if (release) {
- *np = n->next;
+ rcu_assign_pointer(*np,
+ rcu_dereference_protected(n->next,
+ lockdep_is_held(&tbl->lock)));
n->dead = 1;
} else
np = &n->next;
@@ -2196,13 +2318,13 @@ static struct neighbour *neigh_get_first(struct seq_file *seq)
{
struct neigh_seq_state *state = seq->private;
struct net *net = seq_file_net(seq);
- struct neigh_table *tbl = state->tbl;
+ struct neigh_hash_table *nht = state->nht;
struct neighbour *n = NULL;
int bucket = state->bucket;
state->flags &= ~NEIGH_SEQ_IS_PNEIGH;
- for (bucket = 0; bucket <= tbl->hash_mask; bucket++) {
- n = tbl->hash_buckets[bucket];
+ for (bucket = 0; bucket <= nht->hash_mask; bucket++) {
+ n = rcu_dereference_bh(nht->hash_buckets[bucket]);
while (n) {
if (!net_eq(dev_net(n->dev), net))
@@ -2219,8 +2341,8 @@ static struct neighbour *neigh_get_first(struct seq_file *seq)
break;
if (n->nud_state & ~NUD_NOARP)
break;
- next:
- n = n->next;
+next:
+ n = rcu_dereference_bh(n->next);
}
if (n)
@@ -2237,14 +2359,14 @@ static struct neighbour *neigh_get_next(struct seq_file *seq,
{
struct neigh_seq_state *state = seq->private;
struct net *net = seq_file_net(seq);
- struct neigh_table *tbl = state->tbl;
+ struct neigh_hash_table *nht = state->nht;
if (state->neigh_sub_iter) {
void *v = state->neigh_sub_iter(state, n, pos);
if (v)
return n;
}
- n = n->next;
+ n = rcu_dereference_bh(n->next);
while (1) {
while (n) {
@@ -2261,17 +2383,17 @@ static struct neighbour *neigh_get_next(struct seq_file *seq,
if (n->nud_state & ~NUD_NOARP)
break;
- next:
- n = n->next;
+next:
+ n = rcu_dereference_bh(n->next);
}
if (n)
break;
- if (++state->bucket > tbl->hash_mask)
+ if (++state->bucket > nht->hash_mask)
break;
- n = tbl->hash_buckets[state->bucket];
+ n = rcu_dereference_bh(nht->hash_buckets[state->bucket]);
}
if (n && pos)
@@ -2369,7 +2491,7 @@ static void *neigh_get_idx_any(struct seq_file *seq, loff_t *pos)
}
void *neigh_seq_start(struct seq_file *seq, loff_t *pos, struct neigh_table *tbl, unsigned int neigh_seq_flags)
- __acquires(tbl->lock)
+ __acquires(rcu_bh)
{
struct neigh_seq_state *state = seq->private;
@@ -2377,7 +2499,8 @@ void *neigh_seq_start(struct seq_file *seq, loff_t *pos, struct neigh_table *tbl
state->bucket = 0;
state->flags = (neigh_seq_flags & ~NEIGH_SEQ_IS_PNEIGH);
- read_lock_bh(&tbl->lock);
+ rcu_read_lock_bh();
+ state->nht = rcu_dereference_bh(tbl->nht);
return *pos ? neigh_get_idx_any(seq, pos) : SEQ_START_TOKEN;
}
@@ -2411,12 +2534,9 @@ out:
EXPORT_SYMBOL(neigh_seq_next);
void neigh_seq_stop(struct seq_file *seq, void *v)
- __releases(tbl->lock)
+ __releases(rcu_bh)
{
- struct neigh_seq_state *state = seq->private;
- struct neigh_table *tbl = state->tbl;
-
- read_unlock_bh(&tbl->lock);
+ rcu_read_unlock_bh();
}
EXPORT_SYMBOL(neigh_seq_stop);
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index af4dfbadf2a..b143173e3eb 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -515,7 +515,7 @@ static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
return attribute->store(queue, attribute, buf, count);
}
-static struct sysfs_ops rx_queue_sysfs_ops = {
+static const struct sysfs_ops rx_queue_sysfs_ops = {
.show = rx_queue_attr_show,
.store = rx_queue_attr_store,
};
@@ -726,6 +726,7 @@ static struct kobj_type rx_queue_ktype = {
static int rx_queue_add_kobject(struct net_device *net, int index)
{
struct netdev_rx_queue *queue = net->_rx + index;
+ struct netdev_rx_queue *first = queue->first;
struct kobject *kobj = &queue->kobj;
int error = 0;
@@ -738,38 +739,43 @@ static int rx_queue_add_kobject(struct net_device *net, int index)
}
kobject_uevent(kobj, KOBJ_ADD);
+ atomic_inc(&first->count);
return error;
}
-static int rx_queue_register_kobjects(struct net_device *net)
+int
+net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
{
int i;
int error = 0;
- net->queues_kset = kset_create_and_add("queues",
- NULL, &net->dev.kobj);
- if (!net->queues_kset)
- return -ENOMEM;
- for (i = 0; i < net->num_rx_queues; i++) {
+ for (i = old_num; i < new_num; i++) {
error = rx_queue_add_kobject(net, i);
- if (error)
+ if (error) {
+ new_num = old_num;
break;
+ }
}
- if (error)
- while (--i >= 0)
- kobject_put(&net->_rx[i].kobj);
+ while (--i >= new_num)
+ kobject_put(&net->_rx[i].kobj);
return error;
}
-static void rx_queue_remove_kobjects(struct net_device *net)
+static int rx_queue_register_kobjects(struct net_device *net)
{
- int i;
+ net->queues_kset = kset_create_and_add("queues",
+ NULL, &net->dev.kobj);
+ if (!net->queues_kset)
+ return -ENOMEM;
+ return net_rx_queue_update_kobjects(net, 0, net->real_num_rx_queues);
+}
- for (i = 0; i < net->num_rx_queues; i++)
- kobject_put(&net->_rx[i].kobj);
+static void rx_queue_remove_kobjects(struct net_device *net)
+{
+ net_rx_queue_update_kobjects(net, net->real_num_rx_queues, 0);
kset_unregister(net->queues_kset);
}
#endif /* CONFIG_RPS */
@@ -789,12 +795,13 @@ static const void *net_netlink_ns(struct sock *sk)
return sock_net(sk);
}
-static struct kobj_ns_type_operations net_ns_type_operations = {
+struct kobj_ns_type_operations net_ns_type_operations = {
.type = KOBJ_NS_TYPE_NET,
.current_ns = net_current_ns,
.netlink_ns = net_netlink_ns,
.initial_ns = net_initial_ns,
};
+EXPORT_SYMBOL_GPL(net_ns_type_operations);
static void net_kobj_ns_exit(struct net *net)
{
diff --git a/net/core/net-sysfs.h b/net/core/net-sysfs.h
index 805555e8b18..778e1571548 100644
--- a/net/core/net-sysfs.h
+++ b/net/core/net-sysfs.h
@@ -4,4 +4,8 @@
int netdev_kobject_init(void);
int netdev_register_kobject(struct net_device *);
void netdev_unregister_kobject(struct net_device *);
+#ifdef CONFIG_RPS
+int net_rx_queue_update_kobjects(struct net_device *, int old_num, int new_num);
+#endif
+
#endif
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 537e01afd81..4e98ffac3af 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -288,11 +288,11 @@ static int netpoll_owner_active(struct net_device *dev)
return 0;
}
-void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
+void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
+ struct net_device *dev)
{
int status = NETDEV_TX_BUSY;
unsigned long tries;
- struct net_device *dev = np->dev;
const struct net_device_ops *ops = dev->netdev_ops;
/* It is up to the caller to keep npinfo alive. */
struct netpoll_info *npinfo = np->dev->npinfo;
@@ -346,7 +346,7 @@ void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
schedule_delayed_work(&npinfo->tx_work,0);
}
}
-EXPORT_SYMBOL(netpoll_send_skb);
+EXPORT_SYMBOL(netpoll_send_skb_on_dev);
void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
{
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 10a1ea72010..2c0df0f95b3 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -729,16 +729,14 @@ static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
*num = 0;
for (; i < maxlen; i++) {
+ int value;
char c;
*num <<= 4;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
- if ((c >= '0') && (c <= '9'))
- *num |= c - '0';
- else if ((c >= 'a') && (c <= 'f'))
- *num |= c - 'a' + 10;
- else if ((c >= 'A') && (c <= 'F'))
- *num |= c - 'A' + 10;
+ value = hex_to_bin(c);
+ if (value >= 0)
+ *num |= value;
else
break;
}
@@ -3907,8 +3905,6 @@ static void __exit pg_cleanup(void)
{
struct pktgen_thread *t;
struct list_head *q, *n;
- wait_queue_head_t queue;
- init_waitqueue_head(&queue);
/* Stop all interfaces & threads */
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index f78d821bd93..8121268ddbd 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -299,14 +299,6 @@ static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
unregister_netdevice_many(&list_kill);
}
-void rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
-{
- rtnl_lock();
- __rtnl_kill_links(net, ops);
- rtnl_unlock();
-}
-EXPORT_SYMBOL_GPL(rtnl_kill_links);
-
/**
* __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
* @ops: struct rtnl_link_ops * to unregister
@@ -612,36 +604,7 @@ static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
{
- struct rtnl_link_stats64 a;
-
- a.rx_packets = b->rx_packets;
- a.tx_packets = b->tx_packets;
- a.rx_bytes = b->rx_bytes;
- a.tx_bytes = b->tx_bytes;
- a.rx_errors = b->rx_errors;
- a.tx_errors = b->tx_errors;
- a.rx_dropped = b->rx_dropped;
- a.tx_dropped = b->tx_dropped;
-
- a.multicast = b->multicast;
- a.collisions = b->collisions;
-
- a.rx_length_errors = b->rx_length_errors;
- a.rx_over_errors = b->rx_over_errors;
- a.rx_crc_errors = b->rx_crc_errors;
- a.rx_frame_errors = b->rx_frame_errors;
- a.rx_fifo_errors = b->rx_fifo_errors;
- a.rx_missed_errors = b->rx_missed_errors;
-
- a.tx_aborted_errors = b->tx_aborted_errors;
- a.tx_carrier_errors = b->tx_carrier_errors;
- a.tx_fifo_errors = b->tx_fifo_errors;
- a.tx_heartbeat_errors = b->tx_heartbeat_errors;
- a.tx_window_errors = b->tx_window_errors;
-
- a.rx_compressed = b->rx_compressed;
- a.tx_compressed = b->tx_compressed;
- memcpy(v, &a, sizeof(a));
+ memcpy(v, b, sizeof(*b));
}
/* All VF info */
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 56ba3c4e476..104f8444754 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -202,8 +202,6 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
skb->data = data;
skb_reset_tail_pointer(skb);
skb->end = skb->tail + size;
- kmemcheck_annotate_bitfield(skb, flags1);
- kmemcheck_annotate_bitfield(skb, flags2);
#ifdef NET_SKBUFF_DATA_USES_OFFSET
skb->mac_header = ~0U;
#endif
@@ -249,10 +247,9 @@ EXPORT_SYMBOL(__alloc_skb);
struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
unsigned int length, gfp_t gfp_mask)
{
- int node = dev->dev.parent ? dev_to_node(dev->dev.parent) : -1;
struct sk_buff *skb;
- skb = __alloc_skb(length + NET_SKB_PAD, gfp_mask, 0, node);
+ skb = __alloc_skb(length + NET_SKB_PAD, gfp_mask, 0, NUMA_NO_NODE);
if (likely(skb)) {
skb_reserve(skb, NET_SKB_PAD);
skb->dev = dev;
@@ -261,16 +258,6 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
}
EXPORT_SYMBOL(__netdev_alloc_skb);
-struct page *__netdev_alloc_page(struct net_device *dev, gfp_t gfp_mask)
-{
- int node = dev->dev.parent ? dev_to_node(dev->dev.parent) : -1;
- struct page *page;
-
- page = alloc_pages_node(node, gfp_mask, 0);
- return page;
-}
-EXPORT_SYMBOL(__netdev_alloc_page);
-
void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off,
int size)
{
@@ -340,7 +327,7 @@ static void skb_release_data(struct sk_buff *skb)
put_page(skb_shinfo(skb)->frags[i].page);
}
- if (skb_has_frags(skb))
+ if (skb_has_frag_list(skb))
skb_drop_fraglist(skb);
kfree(skb->head);
@@ -686,16 +673,10 @@ static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
struct sk_buff *skb_copy(const struct sk_buff *skb, gfp_t gfp_mask)
{
- int headerlen = skb->data - skb->head;
- /*
- * Allocate the copy buffer
- */
- struct sk_buff *n;
-#ifdef NET_SKBUFF_DATA_USES_OFFSET
- n = alloc_skb(skb->end + skb->data_len, gfp_mask);
-#else
- n = alloc_skb(skb->end - skb->head + skb->data_len, gfp_mask);
-#endif
+ int headerlen = skb_headroom(skb);
+ unsigned int size = (skb_end_pointer(skb) - skb->head) + skb->data_len;
+ struct sk_buff *n = alloc_skb(size, gfp_mask);
+
if (!n)
return NULL;
@@ -727,20 +708,14 @@ EXPORT_SYMBOL(skb_copy);
struct sk_buff *pskb_copy(struct sk_buff *skb, gfp_t gfp_mask)
{
- /*
- * Allocate the copy buffer
- */
- struct sk_buff *n;
-#ifdef NET_SKBUFF_DATA_USES_OFFSET
- n = alloc_skb(skb->end, gfp_mask);
-#else
- n = alloc_skb(skb->end - skb->head, gfp_mask);
-#endif
+ unsigned int size = skb_end_pointer(skb) - skb->head;
+ struct sk_buff *n = alloc_skb(size, gfp_mask);
+
if (!n)
goto out;
/* Set the data pointer */
- skb_reserve(n, skb->data - skb->head);
+ skb_reserve(n, skb_headroom(skb));
/* Set the tail pointer and length */
skb_put(n, skb_headlen(skb));
/* Copy the bytes */
@@ -760,7 +735,7 @@ struct sk_buff *pskb_copy(struct sk_buff *skb, gfp_t gfp_mask)
skb_shinfo(n)->nr_frags = i;
}
- if (skb_has_frags(skb)) {
+ if (skb_has_frag_list(skb)) {
skb_shinfo(n)->frag_list = skb_shinfo(skb)->frag_list;
skb_clone_fraglist(n);
}
@@ -792,12 +767,9 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
{
int i;
u8 *data;
-#ifdef NET_SKBUFF_DATA_USES_OFFSET
- int size = nhead + skb->end + ntail;
-#else
- int size = nhead + (skb->end - skb->head) + ntail;
-#endif
+ int size = nhead + (skb_end_pointer(skb) - skb->head) + ntail;
long off;
+ bool fastpath;
BUG_ON(nhead < 0);
@@ -811,23 +783,36 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
goto nodata;
/* Copy only real data... and, alas, header. This should be
- * optimized for the cases when header is void. */
-#ifdef NET_SKBUFF_DATA_USES_OFFSET
- memcpy(data + nhead, skb->head, skb->tail);
-#else
- memcpy(data + nhead, skb->head, skb->tail - skb->head);
-#endif
- memcpy(data + size, skb_end_pointer(skb),
+ * optimized for the cases when header is void.
+ */
+ memcpy(data + nhead, skb->head, skb_tail_pointer(skb) - skb->head);
+
+ memcpy((struct skb_shared_info *)(data + size),
+ skb_shinfo(skb),
offsetof(struct skb_shared_info, frags[skb_shinfo(skb)->nr_frags]));
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
- get_page(skb_shinfo(skb)->frags[i].page);
+ /* Check if we can avoid taking references on fragments if we own
+ * the last reference on skb->head. (see skb_release_data())
+ */
+ if (!skb->cloned)
+ fastpath = true;
+ else {
+ int delta = skb->nohdr ? (1 << SKB_DATAREF_SHIFT) + 1 : 1;
- if (skb_has_frags(skb))
- skb_clone_fraglist(skb);
+ fastpath = atomic_read(&skb_shinfo(skb)->dataref) == delta;
+ }
- skb_release_data(skb);
+ if (fastpath) {
+ kfree(skb->head);
+ } else {
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+ get_page(skb_shinfo(skb)->frags[i].page);
+ if (skb_has_frag_list(skb))
+ skb_clone_fraglist(skb);
+
+ skb_release_data(skb);
+ }
off = (data + nhead) - skb->head;
skb->head = data;
@@ -1100,7 +1085,7 @@ drop_pages:
for (; i < nfrags; i++)
put_page(skb_shinfo(skb)->frags[i].page);
- if (skb_has_frags(skb))
+ if (skb_has_frag_list(skb))
skb_drop_fraglist(skb);
goto done;
}
@@ -1195,7 +1180,7 @@ unsigned char *__pskb_pull_tail(struct sk_buff *skb, int delta)
/* Optimization: no fragments, no reasons to preestimate
* size of pulled pages. Superb.
*/
- if (!skb_has_frags(skb))
+ if (!skb_has_frag_list(skb))
goto pull_pages;
/* Estimate size of pulled pages. */
@@ -2324,7 +2309,7 @@ next_skb:
st->frag_data = NULL;
}
- if (st->root_skb == st->cur_skb && skb_has_frags(st->root_skb)) {
+ if (st->root_skb == st->cur_skb && skb_has_frag_list(st->root_skb)) {
st->cur_skb = skb_shinfo(st->root_skb)->frag_list;
st->frag_idx = 0;
goto next_skb;
@@ -2894,7 +2879,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
return -ENOMEM;
/* Easy case. Most of packets will go this way. */
- if (!skb_has_frags(skb)) {
+ if (!skb_has_frag_list(skb)) {
/* A little of trouble, not enough of space for trailer.
* This should not happen, when stack is tuned to generate
* good frames. OK, on miss we reallocate and reserve even more
@@ -2929,7 +2914,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
if (skb1->next == NULL && tailbits) {
if (skb_shinfo(skb1)->nr_frags ||
- skb_has_frags(skb1) ||
+ skb_has_frag_list(skb1) ||
skb_tailroom(skb1) < tailbits)
ntail = tailbits + 128;
}
@@ -2938,7 +2923,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
skb_cloned(skb1) ||
ntail ||
skb_shinfo(skb1)->nr_frags ||
- skb_has_frags(skb1)) {
+ skb_has_frag_list(skb1)) {
struct sk_buff *skb2;
/* Fuck, we are miserable poor guys... */
@@ -3021,7 +3006,7 @@ void skb_tstamp_tx(struct sk_buff *orig_skb,
} else {
/*
* no hardware time stamps available,
- * so keep the skb_shared_tx and only
+ * so keep the shared tx_flags and only
* store software time stamp
*/
skb->tstamp = ktime_get_real();
diff --git a/net/core/sock.c b/net/core/sock.c
index 7d99e13148e..11db43632df 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1560,6 +1560,8 @@ struct sk_buff *sock_alloc_send_skb(struct sock *sk, unsigned long size,
EXPORT_SYMBOL(sock_alloc_send_skb);
static void __lock_sock(struct sock *sk)
+ __releases(&sk->sk_lock.slock)
+ __acquires(&sk->sk_lock.slock)
{
DEFINE_WAIT(wait);
@@ -1576,6 +1578,8 @@ static void __lock_sock(struct sock *sk)
}
static void __release_sock(struct sock *sk)
+ __releases(&sk->sk_lock.slock)
+ __acquires(&sk->sk_lock.slock)
{
struct sk_buff *skb = sk->sk_backlog.head;
diff --git a/net/core/utils.c b/net/core/utils.c
index f4185447053..5fea0ab2190 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -75,7 +75,7 @@ __be32 in_aton(const char *str)
str++;
}
}
- return(htonl(l));
+ return htonl(l);
}
EXPORT_SYMBOL(in_aton);
@@ -92,18 +92,19 @@ EXPORT_SYMBOL(in_aton);
static inline int xdigit2bin(char c, int delim)
{
+ int val;
+
if (c == delim || c == '\0')
return IN6PTON_DELIM;
if (c == ':')
return IN6PTON_COLON_MASK;
if (c == '.')
return IN6PTON_DOT;
- if (c >= '0' && c <= '9')
- return (IN6PTON_XDIGIT | IN6PTON_DIGIT| (c - '0'));
- if (c >= 'a' && c <= 'f')
- return (IN6PTON_XDIGIT | (c - 'a' + 10));
- if (c >= 'A' && c <= 'F')
- return (IN6PTON_XDIGIT | (c - 'A' + 10));
+
+ val = hex_to_bin(c);
+ if (val >= 0)
+ return val | IN6PTON_XDIGIT | (val < 10 ? IN6PTON_DIGIT : 0);
+
if (delim == -1)
return IN6PTON_DELIM;
return IN6PTON_UNKNOWN;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-30 12:03:13 +0000