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

Pull networking merge from David Miller:
 "1) Move ixgbe driver over to purely page based buffering on receive.
     From Alexander Duyck.

  2) Add receive packet steering support to e1000e, from Bruce Allan.

  3) Convert TCP MD5 support over to RCU, from Eric Dumazet.

  4) Reduce cpu usage in handling out-of-order TCP packets on modern
     systems, also from Eric Dumazet.

  5) Support the IP{,V6}_UNICAST_IF socket options, making the wine
     folks happy, from Erich Hoover.

  6) Support VLAN trunking from guests in hyperv driver, from Haiyang
     Zhang.

  7) Support byte-queue-limtis in r8169, from Igor Maravic.

  8) Outline code intended for IP_RECVTOS in IP_PKTOPTIONS existed but
     was never properly implemented, Jiri Benc fixed that.

  9) 64-bit statistics support in r8169 and 8139too, from Junchang Wang.

  10) Support kernel side dump filtering by ctmark in netfilter
      ctnetlink, from Pablo Neira Ayuso.

  11) Support byte-queue-limits in gianfar driver, from Paul Gortmaker.

  12) Add new peek socket options to assist with socket migration, from
      Pavel Emelyanov.

  13) Add sch_plug packet scheduler whose queue is controlled by
      userland daemons using explicit freeze and release commands.  From
      Shriram Rajagopalan.

  14) Fix FCOE checksum offload handling on transmit, from Yi Zou."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1846 commits)
  Fix pppol2tp getsockname()
  Remove printk from rds_sendmsg
  ipv6: fix incorrent ipv6 ipsec packet fragment
  cpsw: Hook up default ndo_change_mtu.
  net: qmi_wwan: fix build error due to cdc-wdm dependecy
  netdev: driver: ethernet: Add TI CPSW driver
  netdev: driver: ethernet: add cpsw address lookup engine support
  phy: add am79c874 PHY support
  mlx4_core: fix race on comm channel
  bonding: send igmp report for its master
  fs_enet: Add MPC5125 FEC support and PHY interface selection
  net: bpf_jit: fix BPF_S_LDX_B_MSH compilation
  net: update the usage of CHECKSUM_UNNECESSARY
  fcoe: use CHECKSUM_UNNECESSARY instead of CHECKSUM_PARTIAL on tx
  net: do not do gso for CHECKSUM_UNNECESSARY in netif_needs_gso
  ixgbe: Fix issues with SR-IOV loopback when flow control is disabled
  net/hyperv: Fix the code handling tx busy
  ixgbe: fix namespace issues when FCoE/DCB is not enabled
  rtlwifi: Remove unused ETH_ADDR_LEN defines
  igbvf: Use ETH_ALEN
  ...

Fix up fairly trivial conflicts in drivers/isdn/gigaset/interface.c and
drivers/net/usb/{Kconfig,qmi_wwan.c} as per David.

1 files changed, 44 insertions, 8 deletions

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 85d3bb7490aa..8ee85aa79fa7 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -530,6 +530,16 @@ static int unix_seqpacket_sendmsg(struct kiocb *, struct socket *,
 static int unix_seqpacket_recvmsg(struct kiocb *, struct socket *,
                                   struct msghdr *, size_t, int);
 
+static void unix_set_peek_off(struct sock *sk, int val)
+{
+        struct unix_sock *u = unix_sk(sk);
+
+        mutex_lock(&u->readlock);
+        sk->sk_peek_off = val;
+        mutex_unlock(&u->readlock);
+}
+
+
 static const struct proto_ops unix_stream_ops = {
         .family =       PF_UNIX,
         .owner =        THIS_MODULE,
@@ -549,6 +559,7 @@ static const struct proto_ops unix_stream_ops = {
         .recvmsg =      unix_stream_recvmsg,
         .mmap =         sock_no_mmap,
         .sendpage =     sock_no_sendpage,
+        .set_peek_off = unix_set_peek_off,
 };
 
 static const struct proto_ops unix_dgram_ops = {
@@ -570,6 +581,7 @@ static const struct proto_ops unix_dgram_ops = {
         .recvmsg =      unix_dgram_recvmsg,
         .mmap =         sock_no_mmap,
         .sendpage =     sock_no_sendpage,
+        .set_peek_off = unix_set_peek_off,
 };
 
 static const struct proto_ops unix_seqpacket_ops = {
@@ -591,6 +603,7 @@ static const struct proto_ops unix_seqpacket_ops = {
         .recvmsg =      unix_seqpacket_recvmsg,
         .mmap =         sock_no_mmap,
         .sendpage =     sock_no_sendpage,
+        .set_peek_off = unix_set_peek_off,
 };
 
 static struct proto unix_proto = {
@@ -1756,6 +1769,7 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
         int noblock = flags & MSG_DONTWAIT;
         struct sk_buff *skb;
         int err;
+        int peeked, skip;
 
         err = -EOPNOTSUPP;
         if (flags&MSG_OOB)
@@ -1769,7 +1783,9 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
                 goto out;
         }
 
-        skb = skb_recv_datagram(sk, flags, noblock, &err);
+        skip = sk_peek_offset(sk, flags);
+
+        skb = __skb_recv_datagram(sk, flags, &peeked, &skip, &err);
         if (!skb) {
                 unix_state_lock(sk);
                 /* Signal EOF on disconnected non-blocking SEQPACKET socket. */
@@ -1786,12 +1802,12 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
         if (msg->msg_name)
                 unix_copy_addr(msg, skb->sk);
 
-        if (size > skb->len)
-                size = skb->len;
-        else if (size < skb->len)
+        if (size > skb->len - skip)
+                size = skb->len - skip;
+        else if (size < skb->len - skip)
                 msg->msg_flags |= MSG_TRUNC;
 
-        err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, size);
+        err = skb_copy_datagram_iovec(skb, skip, msg->msg_iov, size);
         if (err)
                 goto out_free;
 
@@ -1808,6 +1824,8 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
         if (!(flags & MSG_PEEK)) {
                 if (UNIXCB(skb).fp)
                         unix_detach_fds(siocb->scm, skb);
+
+                sk_peek_offset_bwd(sk, skb->len);
         } else {
                 /* It is questionable: on PEEK we could:
                    - do not return fds - good, but too simple 8)
@@ -1821,10 +1839,13 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
                    clearly however!
 
                 */
+
+                sk_peek_offset_fwd(sk, size);
+
                 if (UNIXCB(skb).fp)
                         siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
         }
-        err = size;
+        err = (flags & MSG_TRUNC) ? skb->len - skip : size;
 
         scm_recv(sock, msg, siocb->scm, flags);
 
@@ -1884,6 +1905,7 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
         int target;
         int err = 0;
         long timeo;
+        int skip;
 
         err = -EINVAL;
         if (sk->sk_state != TCP_ESTABLISHED)
@@ -1913,12 +1935,15 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
                 goto out;
         }
 
+        skip = sk_peek_offset(sk, flags);
+
         do {
                 int chunk;
                 struct sk_buff *skb;
 
                 unix_state_lock(sk);
                 skb = skb_peek(&sk->sk_receive_queue);
+again:
                 if (skb == NULL) {
                         unix_sk(sk)->recursion_level = 0;
                         if (copied >= target)
@@ -1953,6 +1978,13 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
                         unix_state_unlock(sk);
                         break;
                 }
+
+                if (skip >= skb->len) {
+                        skip -= skb->len;
+                        skb = skb_peek_next(skb, &sk->sk_receive_queue);
+                        goto again;
+                }
+
                 unix_state_unlock(sk);
 
                 if (check_creds) {
@@ -1972,8 +2004,8 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
                         sunaddr = NULL;
                 }
 
-                chunk = min_t(unsigned int, skb->len, size);
-                if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
+                chunk = min_t(unsigned int, skb->len - skip, size);
+                if (memcpy_toiovec(msg->msg_iov, skb->data + skip, chunk)) {
                         if (copied == 0)
                                 copied = -EFAULT;
                         break;
@@ -1985,6 +2017,8 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
                 if (!(flags & MSG_PEEK)) {
                         skb_pull(skb, chunk);
 
+                        sk_peek_offset_bwd(sk, chunk);
+
                         if (UNIXCB(skb).fp)
                                 unix_detach_fds(siocb->scm, skb);
 
@@ -2002,6 +2036,8 @@ static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
                         if (UNIXCB(skb).fp)
                                 siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
 
+                        sk_peek_offset_fwd(sk, chunk);
+
                         break;
                 }
         } while (size);