Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
 "Here is my initial pull request for the networking subsystem during
  this merge window:

   1) Support for ESN in AH (RFC 4302) from Fan Du.

   2) Add full kernel doc for ethtool command structures, from Ben
      Hutchings.

   3) Add BCM7xxx PHY driver, from Florian Fainelli.

   4) Export computed TCP rate information in netlink socket dumps, from
      Eric Dumazet.

   5) Allow IPSEC SA to be dumped partially using a filter, from Nicolas
      Dichtel.

   6) Convert many drivers to pci_enable_msix_range(), from Alexander
      Gordeev.

   7) Record SKB timestamps more efficiently, from Eric Dumazet.

   8) Switch to microsecond resolution for TCP round trip times, also
      from Eric Dumazet.

   9) Clean up and fix 6lowpan fragmentation handling by making use of
      the existing inet_frag api for it's implementation.

  10) Add TX grant mapping to xen-netback driver, from Zoltan Kiss.

  11) Auto size SKB lengths when composing netlink messages based upon
      past message sizes used, from Eric Dumazet.

  12) qdisc dumps can take a long time, add a cond_resched(), From Eric
      Dumazet.

  13) Sanitize netpoll core and drivers wrt.  SKB handling semantics.
      Get rid of never-used-in-tree netpoll RX handling.  From Eric W
      Biederman.

  14) Support inter-address-family and namespace changing in VTI tunnel
      driver(s).  From Steffen Klassert.

  15) Add Altera TSE driver, from Vince Bridgers.

  16) Optimizing csum_replace2() so that it doesn't adjust the checksum
      by checksumming the entire header, from Eric Dumazet.

  17) Expand BPF internal implementation for faster interpreting, more
      direct translations into JIT'd code, and much cleaner uses of BPF
      filtering in non-socket ocntexts.  From Daniel Borkmann and Alexei
      Starovoitov"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1976 commits)
  netpoll: Use skb_irq_freeable to make zap_completion_queue safe.
  net: Add a test to see if a skb is freeable in irq context
  qlcnic: Fix build failure due to undefined reference to `vxlan_get_rx_port'
  net: ptp: move PTP classifier in its own file
  net: sxgbe: make "core_ops" static
  net: sxgbe: fix logical vs bitwise operation
  net: sxgbe: sxgbe_mdio_register() frees the bus
  Call efx_set_channels() before efx->type->dimension_resources()
  xen-netback: disable rogue vif in kthread context
  net/mlx4: Set proper build dependancy with vxlan
  be2net: fix build dependency on VxLAN
  mac802154: make csma/cca parameters per-wpan
  mac802154: allow only one WPAN to be up at any given time
  net: filter: minor: fix kdoc in __sk_run_filter
  netlink: don't compare the nul-termination in nla_strcmp
  can: c_can: Avoid led toggling for every packet.
  can: c_can: Simplify TX interrupt cleanup
  can: c_can: Store dlc private
  can: c_can: Reduce register access
  can: c_can: Make the code readable
  ...

1 files changed, 86 insertions, 18 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 6b8466365fbd..08074a810164 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -32,6 +32,7 @@
 #include <linux/hrtimer.h>
 #include <linux/dma-mapping.h>
 #include <linux/netdev_features.h>
+#include <linux/sched.h>
 #include <net/flow_keys.h>
 
 /* A. Checksumming of received packets by device.
@@ -356,11 +357,62 @@ typedef unsigned int sk_buff_data_t;
 typedef unsigned char *sk_buff_data_t;
 #endif
 
+/**
+ * struct skb_mstamp - multi resolution time stamps
+ * @stamp_us: timestamp in us resolution
+ * @stamp_jiffies: timestamp in jiffies
+ */
+struct skb_mstamp {
+        union {
+                u64             v64;
+                struct {
+                        u32     stamp_us;
+                        u32     stamp_jiffies;
+                };
+        };
+};
+
+/**
+ * skb_mstamp_get - get current timestamp
+ * @cl: place to store timestamps
+ */
+static inline void skb_mstamp_get(struct skb_mstamp *cl)
+{
+        u64 val = local_clock();
+
+        do_div(val, NSEC_PER_USEC);
+        cl->stamp_us = (u32)val;
+        cl->stamp_jiffies = (u32)jiffies;
+}
+
+/**
+ * skb_mstamp_delta - compute the difference in usec between two skb_mstamp
+ * @t1: pointer to newest sample
+ * @t0: pointer to oldest sample
+ */
+static inline u32 skb_mstamp_us_delta(const struct skb_mstamp *t1,
+                                      const struct skb_mstamp *t0)
+{
+        s32 delta_us = t1->stamp_us - t0->stamp_us;
+        u32 delta_jiffies = t1->stamp_jiffies - t0->stamp_jiffies;
+
+        /* If delta_us is negative, this might be because interval is too big,
+         * or local_clock() drift is too big : fallback using jiffies.
+         */
+        if (delta_us <= 0 ||
+            delta_jiffies >= (INT_MAX / (USEC_PER_SEC / HZ)))
+
+                delta_us = jiffies_to_usecs(delta_jiffies);
+
+        return delta_us;
+}
+
+
 /** 
  *      struct sk_buff - socket buffer
  *      @next: Next buffer in list
  *      @prev: Previous buffer in list
- *      @tstamp: Time we arrived
+ *      @tstamp: Time we arrived/left
  *      @sk: Socket we are owned by
  *      @dev: Device we arrived on/are leaving by
  *      @cb: Control buffer. Free for use by every layer. Put private vars here
@@ -392,11 +444,11 @@ typedef unsigned char *sk_buff_data_t;
  *      @skb_iif: ifindex of device we arrived on
  *      @tc_index: Traffic control index
  *      @tc_verd: traffic control verdict
- *      @rxhash: the packet hash computed on receive
+ *      @hash: the packet hash
  *      @queue_mapping: Queue mapping for multiqueue devices
  *      @ndisc_nodetype: router type (from link layer)
  *      @ooo_okay: allow the mapping of a socket to a queue to be changed
- *      @l4_rxhash: indicate rxhash is a canonical 4-tuple hash over transport
+ *      @l4_hash: indicate hash is a canonical 4-tuple hash over transport
  *              ports.
  *      @wifi_acked_valid: wifi_acked was set
  *      @wifi_acked: whether frame was acked on wifi or not
@@ -429,7 +481,10 @@ struct sk_buff {
         struct sk_buff          *next;
         struct sk_buff          *prev;
 
-        ktime_t                 tstamp;
+        union {
+                ktime_t         tstamp;
+                struct skb_mstamp skb_mstamp;
+        };
 
         struct sock             *sk;
         struct net_device       *dev;
@@ -482,7 +537,7 @@ struct sk_buff {
 
         int                     skb_iif;
 
-        __u32                   rxhash;
+        __u32                   hash;
 
         __be16                  vlan_proto;
         __u16                   vlan_tci;
@@ -501,7 +556,7 @@ struct sk_buff {
 #endif
         __u8                    pfmemalloc:1;
         __u8                    ooo_okay:1;
-        __u8                    l4_rxhash:1;
+        __u8                    l4_hash:1;
         __u8                    wifi_acked_valid:1;
         __u8                    wifi_acked:1;
         __u8                    no_fcs:1;
@@ -691,6 +746,8 @@ struct sk_buff *skb_realloc_headroom(struct sk_buff *skb,
                                      unsigned int headroom);
 struct sk_buff *skb_copy_expand(const struct sk_buff *skb, int newheadroom,
                                 int newtailroom, gfp_t priority);
+int skb_to_sgvec_nomark(struct sk_buff *skb, struct scatterlist *sg,
+                        int offset, int len);
 int skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset,
                  int len);
 int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer);
@@ -758,40 +815,40 @@ enum pkt_hash_types {
 static inline void
 skb_set_hash(struct sk_buff *skb, __u32 hash, enum pkt_hash_types type)
 {
-        skb->l4_rxhash = (type == PKT_HASH_TYPE_L4);
-        skb->rxhash = hash;
+        skb->l4_hash = (type == PKT_HASH_TYPE_L4);
+        skb->hash = hash;
 }
 
 void __skb_get_hash(struct sk_buff *skb);
 static inline __u32 skb_get_hash(struct sk_buff *skb)
 {
-        if (!skb->l4_rxhash)
+        if (!skb->l4_hash)
                 __skb_get_hash(skb);
 
-        return skb->rxhash;
+        return skb->hash;
 }
 
 static inline __u32 skb_get_hash_raw(const struct sk_buff *skb)
 {
-        return skb->rxhash;
+        return skb->hash;
 }
 
 static inline void skb_clear_hash(struct sk_buff *skb)
 {
-        skb->rxhash = 0;
-        skb->l4_rxhash = 0;
+        skb->hash = 0;
+        skb->l4_hash = 0;
 }
 
 static inline void skb_clear_hash_if_not_l4(struct sk_buff *skb)
 {
-        if (!skb->l4_rxhash)
+        if (!skb->l4_hash)
                 skb_clear_hash(skb);
 }
 
 static inline void skb_copy_hash(struct sk_buff *to, const struct sk_buff *from)
 {
-        to->rxhash = from->rxhash;
-        to->l4_rxhash = from->l4_rxhash;
+        to->hash = from->hash;
+        to->l4_hash = from->l4_hash;
 };
 
 #ifdef NET_SKBUFF_DATA_USES_OFFSET
@@ -2573,8 +2630,6 @@ static inline ktime_t net_invalid_timestamp(void)
         return ktime_set(0, 0);
 }
 
-void skb_timestamping_init(void);
-
 #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
 
 void skb_clone_tx_timestamp(struct sk_buff *skb);
@@ -2776,6 +2831,19 @@ static inline void skb_init_secmark(struct sk_buff *skb)
 { }
 #endif
 
+static inline bool skb_irq_freeable(const struct sk_buff *skb)
+{
+        return !skb->destructor &&
+#if IS_ENABLED(CONFIG_XFRM)
+                !skb->sp &&
+#endif
+#if IS_ENABLED(CONFIG_NF_CONNTRACK)
+                !skb->nfct &&
+#endif
+                !skb->_skb_refdst &&
+                !skb_has_frag_list(skb);
+}
+
 static inline void skb_set_queue_mapping(struct sk_buff *skb, u16 queue_mapping)
 {
         skb->queue_mapping = queue_mapping;