Merge tag 'v3.10.95' into update

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / net / sock.h

diff --git a/include/net/sock.h b/include/net/sock.h
index 66772cf8c3c528c86104684ca3cf1ac8c5ccfd85..0a7fa044f167a820168885e37ef651eedb395eca 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -230,6 +230,7 @@ struct cg_proto;
   *    @sk_wmem_queued: persistent queue size
   *    @sk_forward_alloc: space allocated forward
   *    @sk_allocation: allocation mode
+  *    @sk_pacing_rate: Pacing rate (if supported by transport/packet scheduler)
   *    @sk_sndbuf: size of send buffer in bytes
   *    @sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE,
   *               %SO_OOBINLINE settings, %SO_TIMESTAMPING settings
@@ -351,10 +352,12 @@ struct sock {
                                sk_no_check  : 2,
                                sk_userlocks : 4,
                                sk_protocol  : 8,
+#define SK_PROTOCOL_MAX U8_MAX
                                sk_type      : 16;
        kmemcheck_bitfield_end(flags);
        int                     sk_wmem_queued;
        gfp_t                   sk_allocation;
+       u32                     sk_pacing_rate; /* bytes per second */
        netdev_features_t       sk_route_caps;
        netdev_features_t       sk_route_nocaps;
        int                     sk_gso_type;
@@ -670,6 +673,8 @@ enum sock_flags {
        SOCK_SELECT_ERR_QUEUE, /* Wake select on error queue */
 };
 
+#define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE))
+
 static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
 {
        nsk->sk_flags = osk->sk_flags;
@@ -778,7 +783,20 @@ static inline __must_check int sk_add_backlog(struct sock *sk, struct sk_buff *s
                                              unsigned int limit)
 {
        if (sk_rcvqueues_full(sk, skb, limit))
+       {
+               #ifdef CONFIG_MTK_NET_LOGGING 
+               printk(KERN_ERR "[mtk_net][sock]sk_add_backlog->sk_rcvqueues_full sk->sk_rcvbuf:%d,sk->sk_sndbuf:%d ",sk->sk_rcvbuf,sk->sk_sndbuf);
+               #endif          
                return -ENOBUFS;
+       }
+
+       /*
+        * If the skb was allocated from pfmemalloc reserves, only
+        * allow SOCK_MEMALLOC sockets to use it as this socket is
+        * helping free memory
+        */
+       if (skb_pfmemalloc(skb) && !sock_flag(sk, SOCK_MEMALLOC))
+               return -ENOMEM;
 
        __sk_add_backlog(sk, skb);
        sk->sk_backlog.len += skb->truesize;
@@ -930,7 +948,6 @@ struct proto {
                                                struct sk_buff *skb);
 
        void            (*release_cb)(struct sock *sk);
-       void            (*mtu_reduced)(struct sock *sk);
 
        /* Keeping track of sk's, looking them up, and port selection methods. */
        void                    (*hash)(struct sock *sk);
@@ -1435,6 +1452,11 @@ static inline void sk_wmem_free_skb(struct sock *sk, struct sk_buff *skb)
  */
 #define sock_owned_by_user(sk) ((sk)->sk_lock.owned)
 
+static inline void sock_release_ownership(struct sock *sk)
+{
+       sk->sk_lock.owned = 0;
+}
+
 /*
  * Macro so as to not evaluate some arguments when
  * lockdep is not enabled.
@@ -1720,8 +1742,8 @@ sk_dst_get(struct sock *sk)
 
        rcu_read_lock();
        dst = rcu_dereference(sk->sk_dst_cache);
-       if (dst)
-               dst_hold(dst);
+       if (dst && !atomic_inc_not_zero(&dst->__refcnt))
+               dst = NULL;
        rcu_read_unlock();
        return dst;
 }
@@ -1760,9 +1782,11 @@ __sk_dst_set(struct sock *sk, struct dst_entry *dst)
 static inline void
 sk_dst_set(struct sock *sk, struct dst_entry *dst)
 {
-       spin_lock(&sk->sk_dst_lock);
-       __sk_dst_set(sk, dst);
-       spin_unlock(&sk->sk_dst_lock);
+       struct dst_entry *old_dst;
+
+       sk_tx_queue_clear(sk);
+       old_dst = xchg((__force struct dst_entry **)&sk->sk_dst_cache, dst);
+       dst_release(old_dst);
 }
 
 static inline void
@@ -1774,9 +1798,7 @@ __sk_dst_reset(struct sock *sk)
 static inline void
 sk_dst_reset(struct sock *sk)
 {
-       spin_lock(&sk->sk_dst_lock);
-       __sk_dst_reset(sk);
-       spin_unlock(&sk->sk_dst_lock);
+       sk_dst_set(sk, NULL);
 }
 
 extern struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie);
@@ -2241,6 +2263,11 @@ extern void sock_enable_timestamp(struct sock *sk, int flag);
 extern int sock_get_timestamp(struct sock *, struct timeval __user *);
 extern int sock_get_timestampns(struct sock *, struct timespec __user *);
 
+bool sk_ns_capable(const struct sock *sk,
+                  struct user_namespace *user_ns, int cap);
+bool sk_capable(const struct sock *sk, int cap);
+bool sk_net_capable(const struct sock *sk, int cap);
+
 /*
  *     Enable debug/info messages
  */