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-rw-r--r--net/core/skbuff.c59
1 files changed, 42 insertions, 17 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 395c15b..88c613e 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -74,6 +74,8 @@
#include <asm/uaccess.h>
#include <trace/events/skb.h>
#include <linux/highmem.h>
+#include <linux/capability.h>
+#include <linux/user_namespace.h>
struct kmem_cache *skbuff_head_cache __read_mostly;
static struct kmem_cache *skbuff_fclone_cache __read_mostly;
@@ -677,13 +679,6 @@ static void skb_release_head_state(struct sk_buff *skb)
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
nf_bridge_put(skb->nf_bridge);
#endif
-/* XXX: IS this still necessary? - JHS */
-#ifdef CONFIG_NET_SCHED
- skb->tc_index = 0;
-#ifdef CONFIG_NET_CLS_ACT
- skb->tc_verd = 0;
-#endif
-#endif
}
/* Free everything but the sk_buff shell. */
@@ -830,6 +825,9 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
#ifdef CONFIG_NET_RX_BUSY_POLL
CHECK_SKB_FIELD(napi_id);
#endif
+#ifdef CONFIG_XPS
+ CHECK_SKB_FIELD(sender_cpu);
+#endif
#ifdef CONFIG_NET_SCHED
CHECK_SKB_FIELD(tc_index);
#ifdef CONFIG_NET_CLS_ACT
@@ -3697,11 +3695,28 @@ static void __skb_complete_tx_timestamp(struct sk_buff *skb,
kfree_skb(skb);
}
+static bool skb_may_tx_timestamp(struct sock *sk, bool tsonly)
+{
+ bool ret;
+
+ if (likely(sysctl_tstamp_allow_data || tsonly))
+ return true;
+
+ read_lock_bh(&sk->sk_callback_lock);
+ ret = sk->sk_socket && sk->sk_socket->file &&
+ file_ns_capable(sk->sk_socket->file, &init_user_ns, CAP_NET_RAW);
+ read_unlock_bh(&sk->sk_callback_lock);
+ return ret;
+}
+
void skb_complete_tx_timestamp(struct sk_buff *skb,
struct skb_shared_hwtstamps *hwtstamps)
{
struct sock *sk = skb->sk;
+ if (!skb_may_tx_timestamp(sk, false))
+ return;
+
/* take a reference to prevent skb_orphan() from freeing the socket */
sock_hold(sk);
@@ -3717,19 +3732,28 @@ void __skb_tstamp_tx(struct sk_buff *orig_skb,
struct sock *sk, int tstype)
{
struct sk_buff *skb;
+ bool tsonly = sk->sk_tsflags & SOF_TIMESTAMPING_OPT_TSONLY;
- if (!sk)
+ if (!sk || !skb_may_tx_timestamp(sk, tsonly))
return;
- if (hwtstamps)
- *skb_hwtstamps(orig_skb) = *hwtstamps;
+ if (tsonly)
+ skb = alloc_skb(0, GFP_ATOMIC);
else
- orig_skb->tstamp = ktime_get_real();
-
- skb = skb_clone(orig_skb, GFP_ATOMIC);
+ skb = skb_clone(orig_skb, GFP_ATOMIC);
if (!skb)
return;
+ if (tsonly) {
+ skb_shinfo(skb)->tx_flags = skb_shinfo(orig_skb)->tx_flags;
+ skb_shinfo(skb)->tskey = skb_shinfo(orig_skb)->tskey;
+ }
+
+ if (hwtstamps)
+ *skb_hwtstamps(skb) = *hwtstamps;
+ else
+ skb->tstamp = ktime_get_real();
+
__skb_complete_tx_timestamp(skb, sk, tstype);
}
EXPORT_SYMBOL_GPL(__skb_tstamp_tx);
@@ -4148,6 +4172,7 @@ void skb_scrub_packet(struct sk_buff *skb, bool xnet)
skb->ignore_df = 0;
skb_dst_drop(skb);
skb->mark = 0;
+ skb->sender_cpu = 0;
skb_init_secmark(skb);
secpath_reset(skb);
nf_reset(skb);
@@ -4204,7 +4229,7 @@ struct sk_buff *skb_vlan_untag(struct sk_buff *skb)
struct vlan_hdr *vhdr;
u16 vlan_tci;
- if (unlikely(vlan_tx_tag_present(skb))) {
+ if (unlikely(skb_vlan_tag_present(skb))) {
/* vlan_tci is already set-up so leave this for another time */
return skb;
}
@@ -4290,7 +4315,7 @@ int skb_vlan_pop(struct sk_buff *skb)
__be16 vlan_proto;
int err;
- if (likely(vlan_tx_tag_present(skb))) {
+ if (likely(skb_vlan_tag_present(skb))) {
skb->vlan_tci = 0;
} else {
if (unlikely((skb->protocol != htons(ETH_P_8021Q) &&
@@ -4320,7 +4345,7 @@ EXPORT_SYMBOL(skb_vlan_pop);
int skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci)
{
- if (vlan_tx_tag_present(skb)) {
+ if (skb_vlan_tag_present(skb)) {
unsigned int offset = skb->data - skb_mac_header(skb);
int err;
@@ -4330,7 +4355,7 @@ int skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci)
*/
__skb_push(skb, offset);
err = __vlan_insert_tag(skb, skb->vlan_proto,
- vlan_tx_tag_get(skb));
+ skb_vlan_tag_get(skb));
if (err)
return err;
skb->protocol = skb->vlan_proto;
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