On 9/15/15 2:09 PM, Pravin B Shelar wrote:
From: Joe Stringer <joestrin...@nicira.com>

Signed-off-by: Joe Stringer <joestrin...@nicira.com>
Signed-off-by: Pravin B Shelar <pshe...@nicira.com>
---
  .travis.yml                                       |    3 +-
  FAQ.md                                            |    1 +
  acinclude.m4                                      |    4 +-
  datapath/datapath.c                               |    4 +--
  datapath/datapath.h                               |    9 +++----
  datapath/flow.c                                   |    4 ++-
  datapath/linux/compat/geneve.c                    |    2 +-
  datapath/linux/compat/include/net/net_namespace.h |   27 +++++++++++++++++++++
  datapath/linux/compat/include/net/udp_tunnel.h    |   15 +++++++++++-
  datapath/linux/compat/include/net/vxlan.h         |   14 ++++++----
  datapath/linux/compat/stt.c                       |   16 +++++++-----
  datapath/linux/compat/udp_tunnel.c                |   10 ++++----
  datapath/linux/compat/vxlan.c                     |    7 ++---
  datapath/vport-lisp.c                             |    3 +-
  datapath/vport-vxlan.c                            |    2 +-
Pravin, when will the changes for contrak support that were merged into upstream net-next be backported to OVS? I don't see them in this patch.
  15 files changed, 83 insertions(+), 38 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index d14f786..f4b9188 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,8 @@ env:
    - TESTSUITE=1 KERNEL=3.18.1
    - TESTSUITE=1 OPTS="--enable-shared"
    - BUILD_ENV="-m32" OPTS="--disable-ssl"
-  - KERNEL=4.0.2
+  - KERNEL=4.1.6
+  - KERNEL=4.0.9
    - KERNEL=3.17.7 DPDK=1
    - KERNEL=3.17.7 DPDK=1 OPTS="--enable-shared"
    - KERNEL=3.17.7
diff --git a/FAQ.md b/FAQ.md
index 631f6a4..cea517d 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -156,6 +156,7 @@ A: The following table lists the Linux kernel versions 
against which the
  |    2.1.x     | 2.6.32 to 3.11
  |    2.3.x     | 2.6.32 to 3.14
  |    2.4.x     | 2.6.32 to 4.0
+|    2.5.x     | 2.6.32 to 4.1

     Open vSwitch userspace should also work with the Linux kernel module
     built into Linux 3.3 and later.
diff --git a/acinclude.m4 b/acinclude.m4
index b755dc4..229f900 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -134,10 +134,10 @@ AC_DEFUN([OVS_CHECK_LINUX], [
      AC_MSG_RESULT([$kversion])

      if test "$version" -ge 4; then
-       if test "$version" = 4 && test "$patchlevel" -le 0; then
+       if test "$version" = 4 && test "$patchlevel" -le 1; then
            : # Linux 4.x
         else
-          AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 
newer than 4.0.x is not supported (please refer to the FAQ for advice)])
+          AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 
newer than 4.1.x is not supported (please refer to the FAQ for advice)])
         fi
      elif test "$version" = 3; then
         : # Linux 3.x
diff --git a/datapath/datapath.c b/datapath/datapath.c
index 73c0b4a..1115649 100644
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -205,7 +205,6 @@ static void destroy_dp_rcu(struct rcu_head *rcu)

        ovs_flow_tbl_destroy(&dp->table);
        free_percpu(dp->stats_percpu);
-       release_net(ovs_dp_get_net(dp));
        kfree(dp->ports);
        kfree(dp);
  }
@@ -1527,7 +1526,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct 
genl_info *info)
        if (dp == NULL)
                goto err_free_reply;

-       ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
+       ovs_dp_set_net(dp, sock_net(skb->sk));

        /* Allocate table. */
        err = ovs_flow_tbl_init(&dp->table);
@@ -1601,7 +1600,6 @@ err_destroy_percpu:
  err_destroy_table:
        ovs_flow_tbl_destroy(&dp->table);
  err_free_dp:
-       release_net(ovs_dp_get_net(dp));
        kfree(dp);
  err_free_reply:
        kfree_skb(reply);
diff --git a/datapath/datapath.h b/datapath/datapath.h
index 526ddad..aca9407 100644
--- a/datapath/datapath.h
+++ b/datapath/datapath.h
@@ -25,6 +25,7 @@
  #include <linux/netdevice.h>
  #include <linux/skbuff.h>
  #include <linux/u64_stats_sync.h>
+#include <net/net_namespace.h>

  #include "compat.h"
  #include "flow.h"
@@ -86,10 +87,8 @@ struct datapath {
        /* Stats. */
        struct dp_stats_percpu __percpu *stats_percpu;

-#ifdef CONFIG_NET_NS
        /* Network namespace ref. */
-       struct net *net;
-#endif
+       possible_net_t net;

        u32 user_features;
  };
@@ -156,12 +155,12 @@ int lockdep_ovsl_is_held(void);

  static inline struct net *ovs_dp_get_net(const struct datapath *dp)
  {
-       return read_pnet(&dp->net);
+       return rpl_read_pnet(&dp->net);
  }

  static inline void ovs_dp_set_net(struct datapath *dp, struct net *net)
  {
-       write_pnet(&dp->net, net);
+       rpl_write_pnet(&dp->net, net);
  }

  struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no);
diff --git a/datapath/flow.c b/datapath/flow.c
index a7a2063..8ef60d1 100644
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -101,7 +101,9 @@ void ovs_flow_stats_update(struct sw_flow *flow, __be16 
tcp_flags,

                                new_stats =
                                        kmem_cache_alloc_node(flow_stats_cache,
-                                                             GFP_THISNODE |
+                                                              GFP_NOWAIT |
+                                                              __GFP_THISNODE |
+                                                              __GFP_NOWARN |
                                                              __GFP_NOMEMALLOC,
                                                              node);
                                if (likely(new_stats)) {
diff --git a/datapath/linux/compat/geneve.c b/datapath/linux/compat/geneve.c
index 78d3395..8e80180 100644
--- a/datapath/linux/compat/geneve.c
+++ b/datapath/linux/compat/geneve.c
@@ -117,7 +117,7 @@ int rpl_geneve_xmit_skb(struct geneve_sock *gs, struct 
rtable *rt,

        ovs_skb_set_inner_protocol(skb, htons(ETH_P_TEB));

-       return udp_tunnel_xmit_skb(rt, skb, src, dst,
+       return udp_tunnel_xmit_skb(rt, gs->sock->sk, skb, src, dst,
                                   tos, ttl, df, src_port, dst_port, xnet,
                                   !csum);
  }
diff --git a/datapath/linux/compat/include/net/net_namespace.h 
b/datapath/linux/compat/include/net/net_namespace.h
index b7dbfe3..edfa131 100644
--- a/datapath/linux/compat/include/net/net_namespace.h
+++ b/datapath/linux/compat/include/net/net_namespace.h
@@ -51,4 +51,31 @@ static void rpl_unregister_pernet_gen_##TYPE(struct 
rpl_pernet_operations *rpl_p
  #define DEFINE_COMPAT_PNET_REG_FUNC(TYPE)
  #endif /* 2.6.33 */

+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0)
+typedef struct {
+#ifdef CONFIG_NET_NS
+       struct net *net;
+#endif
+} possible_net_t;
+
+static inline void rpl_write_pnet(possible_net_t *pnet, struct net *net)
+{
+#ifdef CONFIG_NET_NS
+       pnet->net = net;
+#endif
+}
+
+static inline struct net *rpl_read_pnet(const possible_net_t *pnet)
+{
+#ifdef CONFIG_NET_NS
+       return pnet->net;
+#else
+       return &init_net;
+#endif
+}
+#else /* Linux >= 4.1 */
+#define rpl_read_pnet read_pnet
+#define rpl_write_pnet write_pnet
+#endif /* Linux >= 4.1 */
+
  #endif /* net/net_namespace.h wrapper */
diff --git a/datapath/linux/compat/include/net/udp_tunnel.h 
b/datapath/linux/compat/include/net/udp_tunnel.h
index 81cb3df..d334746 100644
--- a/datapath/linux/compat/include/net/udp_tunnel.h
+++ b/datapath/linux/compat/include/net/udp_tunnel.h
@@ -19,6 +19,18 @@ rpl_udp_tunnel_handle_offloads(struct sk_buff *skb, bool 
udp_csum,
  }
  #define udp_tunnel_handle_offloads rpl_udp_tunnel_handle_offloads

+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0)
+static inline int rpl_udp_tunnel_xmit_skb(struct rtable *rt,
+                                         struct sock *sk, struct sk_buff *skb,
+                                         __be32 src, __be32 dst, __u8 tos, 
__u8 ttl,
+                                         __be16 df, __be16 src_port, __be16 
dst_port,
+                                         bool xnet, bool nocheck)
+{
+       return udp_tunnel_xmit_skb(rt, skb, src, dst, tos, ttl, df, src_port,
+                                  dst_port, xnet, nocheck);
+}
+#define udp_tunnel_xmit_skb rpl_udp_tunnel_xmit_skb
+#endif
  #else

  #include <net/ip_tunnels.h>
@@ -71,7 +83,8 @@ void rpl_setup_udp_tunnel_sock(struct net *net, struct socket 
*sock,

  /* Transmit the skb using UDP encapsulation. */
  #define udp_tunnel_xmit_skb rpl_udp_tunnel_xmit_skb
-int rpl_udp_tunnel_xmit_skb(struct rtable *rt, struct sk_buff *skb,
+int rpl_udp_tunnel_xmit_skb(struct rtable *rt,
+                           struct sock *sk, struct sk_buff *skb,
                            __be32 src, __be32 dst, __u8 tos, __u8 ttl,
                            __be16 df, __be16 src_port, __be16 dst_port,
                            bool xnet, bool nocheck);
diff --git a/datapath/linux/compat/include/net/vxlan.h 
b/datapath/linux/compat/include/net/vxlan.h
index 0d60c18..cafff79 100644
--- a/datapath/linux/compat/include/net/vxlan.h
+++ b/datapath/linux/compat/include/net/vxlan.h
@@ -88,10 +88,9 @@ struct vxlanhdr_gbp {
  #endif

  #ifdef USE_UPSTREAM_VXLAN
-static inline int rpl_vxlan_xmit_skb(struct vxlan_sock *vs,
-                   struct rtable *rt, struct sk_buff *skb,
-                   __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
-                   __be16 src_port, __be16 dst_port,
+static inline int rpl_vxlan_xmit_skb(struct rtable *rt, struct sock *sk,
+                  struct sk_buff *skb, __be32 src, __be32 dst, __u8 tos,
+                  __u8 ttl, __be16 df, __be16 src_port, __be16 dst_port,
                   struct vxlan_metadata *md, bool xnet, u32 vxflags)
  {
        if (skb_is_gso(skb) && skb_is_encapsulated(skb)) {
@@ -99,7 +98,11 @@ static inline int rpl_vxlan_xmit_skb(struct vxlan_sock *vs,
                return -ENOSYS;
        }

+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0)
        return vxlan_xmit_skb(rt, skb, src, dst, tos, ttl, df,
+#else
+       return vxlan_xmit_skb(rt, sk, skb, src, dst, tos, ttl, df,
+#endif
                              src_port, dst_port, md, xnet, vxflags);
  }

@@ -138,8 +141,7 @@ struct vxlan_sock *rpl_vxlan_sock_add(struct net *net, 
__be16 port,
  void rpl_vxlan_sock_release(struct vxlan_sock *vs);

  #define vxlan_xmit_skb rpl_vxlan_xmit_skb
-int rpl_vxlan_xmit_skb(struct vxlan_sock *vs,
-                      struct rtable *rt, struct sk_buff *skb,
+int rpl_vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
                       __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
                       __be16 src_port, __be16 dst_port,
                       struct vxlan_metadata *md, bool xnet, u32 vxflags);
diff --git a/datapath/linux/compat/stt.c b/datapath/linux/compat/stt.c
index dd21753..e27cedf 100644
--- a/datapath/linux/compat/stt.c
+++ b/datapath/linux/compat/stt.c
@@ -1320,16 +1320,18 @@ static void clean_percpu(struct work_struct *work)
  }

  #ifdef HAVE_NF_HOOKFN_ARG_OPS
-#define FIRST_PARAM const struct nf_hook_ops *ops,
+#define FIRST_PARAM const struct nf_hook_ops *ops
  #else
-#define FIRST_PARAM unsigned int hooknum,
+#define FIRST_PARAM unsigned int hooknum
  #endif

-static unsigned int nf_ip_hook(FIRST_PARAM
-                              struct sk_buff *skb,
-                              const struct net_device *in,
-                              const struct net_device *out,
-                              int (*okfn)(struct sk_buff *))
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,1,0)
+#define LAST_PARAM const struct nf_hook_state *state
+#else
+#define LAST_PARAM const struct net_device *in, const struct net_device *out, 
int (*okfn)(struct sk_buff *)
+#endif
+
+static unsigned int nf_ip_hook(FIRST_PARAM, struct sk_buff *skb, LAST_PARAM)
  {
        struct stt_sock *stt_sock;
        int ip_hdr_len;
diff --git a/datapath/linux/compat/udp_tunnel.c 
b/datapath/linux/compat/udp_tunnel.c
index c84113b..680fd83 100644
--- a/datapath/linux/compat/udp_tunnel.c
+++ b/datapath/linux/compat/udp_tunnel.c
@@ -142,10 +142,10 @@ void ovs_udp_csum_gso(struct sk_buff *skb)
  }
  EXPORT_SYMBOL_GPL(ovs_udp_csum_gso);

-int rpl_udp_tunnel_xmit_skb(struct rtable *rt, struct sk_buff *skb,
-                           __be32 src, __be32 dst, __u8 tos, __u8 ttl,
-                           __be16 df, __be16 src_port, __be16 dst_port,
-                           bool xnet, bool nocheck)
+int rpl_udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk,
+                           struct sk_buff *skb, __be32 src, __be32 dst,
+                           __u8 tos, __u8 ttl, __be16 df, __be16 src_port,
+                           __be16 dst_port, bool xnet, bool nocheck)
  {
        struct udphdr *uh;

@@ -159,7 +159,7 @@ int rpl_udp_tunnel_xmit_skb(struct rtable *rt, struct 
sk_buff *skb,

        udp_set_csum(nocheck, skb, src, dst, skb->len);

-       return iptunnel_xmit(skb->sk, rt, skb, src, dst, IPPROTO_UDP,
+       return iptunnel_xmit(sk, rt, skb, src, dst, IPPROTO_UDP,
                             tos, ttl, df, xnet);
  }
  EXPORT_SYMBOL_GPL(rpl_udp_tunnel_xmit_skb);
diff --git a/datapath/linux/compat/vxlan.c b/datapath/linux/compat/vxlan.c
index 129f171..fd454ae 100644
--- a/datapath/linux/compat/vxlan.c
+++ b/datapath/linux/compat/vxlan.c
@@ -180,8 +180,7 @@ static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 
vxflags,
        gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
  }

-int rpl_vxlan_xmit_skb(struct vxlan_sock *vs,
-                      struct rtable *rt, struct sk_buff *skb,
+int rpl_vxlan_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,
                       __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
                       __be16 src_port, __be16 dst_port,
                       struct vxlan_metadata *md, bool xnet, u32 vxflags)
@@ -217,11 +216,11 @@ int rpl_vxlan_xmit_skb(struct vxlan_sock *vs,
        if (vxflags & VXLAN_F_GBP)
                vxlan_build_gbp_hdr(vxh, vxflags, md);

-       vxlan_set_owner(vs->sock->sk, skb);
+       vxlan_set_owner(sk, skb);

        ovs_skb_set_inner_protocol(skb, htons(ETH_P_TEB));

-       return udp_tunnel_xmit_skb(rt, skb, src, dst, tos,
+       return udp_tunnel_xmit_skb(rt, sk, skb, src, dst, tos,
                                   ttl, df, src_port, dst_port, xnet,
                                   !udp_sum);
  }
diff --git a/datapath/vport-lisp.c b/datapath/vport-lisp.c
index 0024eb4..104a21d 100644
--- a/datapath/vport-lisp.c
+++ b/datapath/vport-lisp.c
@@ -455,7 +455,8 @@ static int lisp_send(struct vport *vport, struct sk_buff 
*skb)
        ovs_skb_set_inner_protocol(skb, skb->protocol);

        df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
-       sent_len = udp_tunnel_xmit_skb(rt, skb, saddr, tun_key->ipv4_dst,
+       sent_len = udp_tunnel_xmit_skb(rt, lisp_port->lisp_rcv_socket->sk, skb,
+                                      saddr, tun_key->ipv4_dst,
                                       tun_key->ipv4_tos, tun_key->ipv4_ttl,
                                       df, src_port, dst_port, false, true);

diff --git a/datapath/vport-vxlan.c b/datapath/vport-vxlan.c
index eff7ca2..fc9f350 100644
--- a/datapath/vport-vxlan.c
+++ b/datapath/vport-vxlan.c
@@ -260,7 +260,7 @@ static int vxlan_tnl_send(struct vport *vport, struct 
sk_buff *skb)
        vxflags = vxlan_port->exts |
                      (tun_key->tun_flags & TUNNEL_CSUM ? VXLAN_F_UDP_CSUM : 0);

-       err = vxlan_xmit_skb(vxlan_port->vs, rt, skb,
+       err = vxlan_xmit_skb(rt, vxlan_port->vs->sock->sk, skb,
                             saddr, tun_key->ipv4_dst,
                             tun_key->ipv4_tos,
                             tun_key->ipv4_ttl, df,


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