Merge tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:

 - Add redirect_neigh() BPF packet redirect helper, allowing to limit
   stack traversal in common container configs and improving TCP
   back-pressure.

   Daniel reports ~10Gbps => ~15Gbps single stream TCP performance gain.

 - Expand netlink policy support and improve policy export to user
   space. (Ge)netlink core performs request validation according to
   declared policies. Expand the expressiveness of those policies
   (min/max length and bitmasks). Allow dumping policies for particular
   commands. This is used for feature discovery by user space (instead
   of kernel version parsing or trial and error).

 - Support IGMPv3/MLDv2 multicast listener discovery protocols in
   bridge.

 - Allow more than 255 IPv4 multicast interfaces.

 - Add support for Type of Service (ToS) reflection in SYN/SYN-ACK
   packets of TCPv6.

 - In Multi-patch TCP (MPTCP) support concurrent transmission of data on
   multiple subflows in a load balancing scenario. Enhance advertising
   addresses via the RM_ADDR/ADD_ADDR options.

 - Support SMC-Dv2 version of SMC, which enables multi-subnet
   deployments.

 - Allow more calls to same peer in RxRPC.

 - Support two new Controller Area Network (CAN) protocols - CAN-FD and
   ISO 15765-2:2016.

 - Add xfrm/IPsec compat layer, solving the 32bit user space on 64bit
   kernel problem.

 - Add TC actions for implementing MPLS L2 VPNs.

 - Improve nexthop code - e.g. handle various corner cases when nexthop
   objects are removed from groups better, skip unnecessary
   notifications and make it easier to offload nexthops into HW by
   converting to a blocking notifier.

 - Support adding and consuming TCP header options by BPF programs,
   opening the doors for easy experimental and deployment-specific TCP
   option use.

 - Reorganize TCP congestion control (CC) initialization to simplify
   life of TCP CC implemented in BPF.

 - Add support for shipping BPF programs with the kernel and loading
   them early on boot via the User Mode Driver mechanism, hence reusing
   all the user space infra we have.

 - Support sleepable BPF programs, initially targeting LSM and tracing.

 - Add bpf_d_path() helper for returning full path for given 'struct
   path'.

 - Make bpf_tail_call compatible with bpf-to-bpf calls.

 - Allow BPF programs to call map_update_elem on sockmaps.

 - Add BPF Type Format (BTF) support for type and enum discovery, as
   well as support for using BTF within the kernel itself (current use
   is for pretty printing structures).

 - Support listing and getting information about bpf_links via the bpf
   syscall.

 - Enhance kernel interfaces around NIC firmware update. Allow
   specifying overwrite mask to control if settings etc. are reset
   during update; report expected max time operation may take to users;
   support firmware activation without machine reboot incl. limits of
   how much impact reset may have (e.g. dropping link or not).

 - Extend ethtool configuration interface to report IEEE-standard
   counters, to limit the need for per-vendor logic in user space.

 - Adopt or extend devlink use for debug, monitoring, fw update in many
   drivers (dsa loop, ice, ionic, sja1105, qed, mlxsw, mv88e6xxx,
   dpaa2-eth).

 - In mlxsw expose critical and emergency SFP module temperature alarms.
   Refactor port buffer handling to make the defaults more suitable and
   support setting these values explicitly via the DCBNL interface.

 - Add XDP support for Intel's igb driver.

 - Support offloading TC flower classification and filtering rules to
   mscc_ocelot switches.

 - Add PTP support for Marvell Octeontx2 and PP2.2 hardware, as well as
   fixed interval period pulse generator and one-step timestamping in
   dpaa-eth.

 - Add support for various auth offloads in WiFi APs, e.g. SAE (WPA3)
   offload.

 - Add Lynx PHY/PCS MDIO module, and convert various drivers which have
   this HW to use it. Convert mvpp2 to split PCS.

 - Support Marvell Prestera 98DX3255 24-port switch ASICs, as well as
   7-port Mediatek MT7531 IP.

 - Add initial support for QCA6390 and IPQ6018 in ath11k WiFi driver,
   and wcn3680 support in wcn36xx.

 - Improve performance for packets which don't require much offloads on
   recent Mellanox NICs by 20% by making multiple packets share a
   descriptor entry.

 - Move chelsio inline crypto drivers (for TLS and IPsec) from the
   crypto subtree to drivers/net. Move MDIO drivers out of the phy
   directory.

 - Clean up a lot of W=1 warnings, reportedly the actively developed
   subsections of networking drivers should now build W=1 warning free.

 - Make sure drivers don't use in_interrupt() to dynamically adapt their
   code. Convert tasklets to use new tasklet_setup API (sadly this
   conversion is not yet complete).

* tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2583 commits)
  Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH"
  net, sockmap: Don't call bpf_prog_put() on NULL pointer
  bpf, selftest: Fix flaky tcp_hdr_options test when adding addr to lo
  bpf, sockmap: Add locking annotations to iterator
  netfilter: nftables: allow re-computing sctp CRC-32C in 'payload' statements
  net: fix pos incrementment in ipv6_route_seq_next
  net/smc: fix invalid return code in smcd_new_buf_create()
  net/smc: fix valid DMBE buffer sizes
  net/smc: fix use-after-free of delayed events
  bpfilter: Fix build error with CONFIG_BPFILTER_UMH
  cxgb4/ch_ipsec: Replace the module name to ch_ipsec from chcr
  net: sched: Fix suspicious RCU usage while accessing tcf_tunnel_info
  bpf: Fix register equivalence tracking.
  rxrpc: Fix loss of final ack on shutdown
  rxrpc: Fix bundle counting for exclusive connections
  netfilter: restore NF_INET_NUMHOOKS
  ibmveth: Identify ingress large send packets.
  ibmveth: Switch order of ibmveth_helper calls.
  cxgb4: handle 4-tuple PEDIT to NAT mode translation
  selftests: Add VRF route leaking tests
  ...

1 files changed, 23 insertions, 7 deletions

diff --git a/net/smc/smc_diag.c b/net/smc/smc_diag.c
index da9ba6d1679b..f15fca59b4b2 100644
--- a/net/smc/smc_diag.c
+++ b/net/smc/smc_diag.c
@@ -22,6 +22,15 @@
 #include "smc.h"
 #include "smc_core.h"
 
+struct smc_diag_dump_ctx {
+	int pos[2];
+};
+
+static struct smc_diag_dump_ctx *smc_dump_context(struct netlink_callback *cb)
+{
+	return (struct smc_diag_dump_ctx *)cb->ctx;
+}
+
 static void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw)
 {
 	sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
@@ -193,13 +202,15 @@ errout:
 }
 
 static int smc_diag_dump_proto(struct proto *prot, struct sk_buff *skb,
-			       struct netlink_callback *cb)
+			       struct netlink_callback *cb, int p_type)
 {
+	struct smc_diag_dump_ctx *cb_ctx = smc_dump_context(cb);
 	struct net *net = sock_net(skb->sk);
+	int snum = cb_ctx->pos[p_type];
 	struct nlattr *bc = NULL;
 	struct hlist_head *head;
+	int rc = 0, num = 0;
 	struct sock *sk;
-	int rc = 0;
 
 	read_lock(&prot->h.smc_hash->lock);
 	head = &prot->h.smc_hash->ht;
@@ -209,13 +220,18 @@ static int smc_diag_dump_proto(struct proto *prot, struct sk_buff *skb,
 	sk_for_each(sk, head) {
 		if (!net_eq(sock_net(sk), net))
 			continue;
+		if (num < snum)
+			goto next;
 		rc = __smc_diag_dump(sk, skb, cb, nlmsg_data(cb->nlh), bc);
-		if (rc)
-			break;
+		if (rc < 0)
+			goto out;
+next:
+		num++;
 	}
 
 out:
 	read_unlock(&prot->h.smc_hash->lock);
+	cb_ctx->pos[p_type] = num;
 	return rc;
 }
 
@@ -223,10 +239,10 @@ static int smc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
 {
 	int rc = 0;
 
-	rc = smc_diag_dump_proto(&smc_proto, skb, cb);
+	rc = smc_diag_dump_proto(&smc_proto, skb, cb, SMCPROTO_SMC);
 	if (!rc)
-		rc = smc_diag_dump_proto(&smc_proto6, skb, cb);
-	return rc;
+		smc_diag_dump_proto(&smc_proto6, skb, cb, SMCPROTO_SMC6);
+	return skb->len;
 }
 
 static int smc_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)