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

Pull networking updates from David Miller:

 1) Add VF IPSEC offload support in ixgbe, from Shannon Nelson.

 2) Add zero-copy AF_XDP support to i40e, from Björn Töpel.

 3) All in-tree drivers are converted to {g,s}et_link_ksettings() so we
    can get rid of the {g,s}et_settings ethtool callbacks, from Michal
    Kubecek.

 4) Add software timestamping to veth driver, from Michael Walle.

 5) More work to make packet classifiers and actions lockless, from Vlad
    Buslov.

 6) Support sticky FDB entries in bridge, from Nikolay Aleksandrov.

 7) Add ipv6 version of IP_MULTICAST_ALL sockopt, from Andre Naujoks.

 8) Support batching of XDP buffers in vhost_net, from Jason Wang.

 9) Add flow dissector BPF hook, from Petar Penkov.

10) i40e vf --> generic iavf conversion, from Jesse Brandeburg.

11) Add NLA_REJECT netlink attribute policy type, to signal when users
    provide attributes in situations which don't make sense. From
    Johannes Berg.

12) Switch TCP and fair-queue scheduler over to earliest departure time
    model. From Eric Dumazet.

13) Improve guest receive performance by doing rx busy polling in tx
    path of vhost networking driver, from Tonghao Zhang.

14) Add per-cgroup local storage to bpf

15) Add reference tracking to BPF, from Joe Stringer. The verifier can
    now make sure that references taken to objects are properly released
    by the program.

16) Support in-place encryption in TLS, from Vakul Garg.

17) Add new taprio packet scheduler, from Vinicius Costa Gomes.

18) Lots of selftests additions, too numerous to mention one by one here
    but all of which are very much appreciated.

19) Support offloading of eBPF programs containing BPF to BPF calls in
    nfp driver, frm Quentin Monnet.

20) Move dpaa2_ptp driver out of staging, from Yangbo Lu.

21) Lots of u32 classifier cleanups and simplifications, from Al Viro.

22) Add new strict versions of netlink message parsers, and enable them
    for some situations. From David Ahern.

23) Evict neighbour entries on carrier down, also from David Ahern.

24) Support BPF sk_msg verdict programs with kTLS, from Daniel Borkmann
    and John Fastabend.

25) Add support for filtering route dumps, from David Ahern.

26) New igc Intel driver for 2.5G parts, from Sasha Neftin et al.

27) Allow vxlan enslavement to bridges in mlxsw driver, from Ido
    Schimmel.

28) Add queue and stack map types to eBPF, from Mauricio Vasquez B.

29) Add back byte-queue-limit support to r8169, with all the bug fixes
    in other areas of the driver it works now! From Florian Westphal and
    Heiner Kallweit.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2147 commits)
  tcp: add tcp_reset_xmit_timer() helper
  qed: Fix static checker warning
  Revert "be2net: remove desc field from be_eq_obj"
  Revert "net: simplify sock_poll_wait"
  net: socionext: Reset tx queue in ndo_stop
  net: socionext: Add dummy PHY register read in phy_write()
  net: socionext: Stop PHY before resetting netsec
  net: stmmac: Set OWN bit for jumbo frames
  arm64: dts: stratix10: Support Ethernet Jumbo frame
  tls: Add maintainers
  net: ethernet: ti: cpsw: unsync mcast entries while switch promisc mode
  octeontx2-af: Support for NIXLF's UCAST/PROMISC/ALLMULTI modes
  octeontx2-af: Support for setting MAC address
  octeontx2-af: Support for changing RSS algorithm
  octeontx2-af: NIX Rx flowkey configuration for RSS
  octeontx2-af: Install ucast and bcast pkt forwarding rules
  octeontx2-af: Add LMAC channel info to NIXLF_ALLOC response
  octeontx2-af: NPC MCAM and LDATA extract minimal configuration
  octeontx2-af: Enable packet length and csum validation
  octeontx2-af: Support for VTAG strip and capture
  ...

1 files changed, 15 insertions, 44 deletions

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index c1c1bda334a4..fc0386e8ff23 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -83,7 +83,7 @@
 #include <net/sctp/stream_sched.h>
 
 /* Forward declarations for internal helper functions. */
-static int sctp_writeable(struct sock *sk);
+static bool sctp_writeable(struct sock *sk);
 static void sctp_wfree(struct sk_buff *skb);
 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
 				size_t msg_len);
@@ -119,25 +119,10 @@ static void sctp_enter_memory_pressure(struct sock *sk)
 /* Get the sndbuf space available at the time on the association.  */
 static inline int sctp_wspace(struct sctp_association *asoc)
 {
-	int amt;
+	struct sock *sk = asoc->base.sk;
 
-	if (asoc->ep->sndbuf_policy)
-		amt = asoc->sndbuf_used;
-	else
-		amt = sk_wmem_alloc_get(asoc->base.sk);
-
-	if (amt >= asoc->base.sk->sk_sndbuf) {
-		if (asoc->base.sk->sk_userlocks & SOCK_SNDBUF_LOCK)
-			amt = 0;
-		else {
-			amt = sk_stream_wspace(asoc->base.sk);
-			if (amt < 0)
-				amt = 0;
-		}
-	} else {
-		amt = asoc->base.sk->sk_sndbuf - amt;
-	}
-	return amt;
+	return asoc->ep->sndbuf_policy ? sk->sk_sndbuf - asoc->sndbuf_used
+				       : sk_stream_wspace(sk);
 }
 
 /* Increment the used sndbuf space count of the corresponding association by
@@ -166,12 +151,9 @@ static inline void sctp_set_owner_w(struct sctp_chunk *chunk)
 	/* Save the chunk pointer in skb for sctp_wfree to use later.  */
 	skb_shinfo(chunk->skb)->destructor_arg = chunk;
 
-	asoc->sndbuf_used += SCTP_DATA_SNDSIZE(chunk) +
-				sizeof(struct sk_buff) +
-				sizeof(struct sctp_chunk);
-
 	refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
-	sk->sk_wmem_queued += chunk->skb->truesize;
+	asoc->sndbuf_used += chunk->skb->truesize + sizeof(struct sctp_chunk);
+	sk->sk_wmem_queued += chunk->skb->truesize + sizeof(struct sctp_chunk);
 	sk_mem_charge(sk, chunk->skb->truesize);
 }
 
@@ -1927,10 +1909,10 @@ static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
 		asoc->pmtu_pending = 0;
 	}
 
-	if (sctp_wspace(asoc) < msg_len)
+	if (sctp_wspace(asoc) < (int)msg_len)
 		sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc));
 
-	if (!sctp_wspace(asoc)) {
+	if (sctp_wspace(asoc) <= 0) {
 		timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
 		err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len);
 		if (err)
@@ -8461,17 +8443,11 @@ static void sctp_wfree(struct sk_buff *skb)
 	struct sctp_association *asoc = chunk->asoc;
 	struct sock *sk = asoc->base.sk;
 
-	asoc->sndbuf_used -= SCTP_DATA_SNDSIZE(chunk) +
-				sizeof(struct sk_buff) +
-				sizeof(struct sctp_chunk);
-
-	WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc));
-
-	/*
-	 * This undoes what is done via sctp_set_owner_w and sk_mem_charge
-	 */
-	sk->sk_wmem_queued   -= skb->truesize;
 	sk_mem_uncharge(sk, skb->truesize);
+	sk->sk_wmem_queued -= skb->truesize + sizeof(struct sctp_chunk);
+	asoc->sndbuf_used -= skb->truesize + sizeof(struct sctp_chunk);
+	WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk),
+				      &sk->sk_wmem_alloc));
 
 	if (chunk->shkey) {
 		struct sctp_shared_key *shkey = chunk->shkey;
@@ -8545,7 +8521,7 @@ static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
 			goto do_error;
 		if (signal_pending(current))
 			goto do_interrupted;
-		if (msg_len <= sctp_wspace(asoc))
+		if ((int)msg_len <= sctp_wspace(asoc))
 			break;
 
 		/* Let another process have a go.  Since we are going
@@ -8620,14 +8596,9 @@ void sctp_write_space(struct sock *sk)
  * UDP-style sockets or TCP-style sockets, this code should work.
  *  - Daisy
  */
-static int sctp_writeable(struct sock *sk)
+static bool sctp_writeable(struct sock *sk)
 {
-	int amt = 0;
-
-	amt = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
-	if (amt < 0)
-		amt = 0;
-	return amt;
+	return sk->sk_sndbuf > sk->sk_wmem_queued;
 }
 
 /* Wait for an association to go into ESTABLISHED state. If timeout is 0,