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

Pull networking updates from David Miller:
 "This is a re-do of the net-next pull request for the current merge
  window.  The only difference from the one I made the other day is that
  this has Eliezer's interface renames and the timeout handling changes
  made based upon your feedback, as well as a few bug fixes that have
  trickeled in.

  Highlights:

   1) Low latency device polling, eliminating the cost of interrupt
      handling and context switches.  Allows direct polling of a network
      device from socket operations, such as recvmsg() and poll().

      Currently ixgbe, mlx4, and bnx2x support this feature.

      Full high level description, performance numbers, and design in
      commit 0a4db187a999 ("Merge branch 'll_poll'")

      From Eliezer Tamir.

   2) With the routing cache removed, ip_check_mc_rcu() gets exercised
      more than ever before in the case where we have lots of multicast
      addresses.  Use a hash table instead of a simple linked list, from
      Eric Dumazet.

   3) Add driver for Atheros CQA98xx 802.11ac wireless devices, from
      Bartosz Markowski, Janusz Dziedzic, Kalle Valo, Marek Kwaczynski,
      Marek Puzyniak, Michal Kazior, and Sujith Manoharan.

   4) Support reporting the TUN device persist flag to userspace, from
      Pavel Emelyanov.

   5) Allow controlling network device VF link state using netlink, from
      Rony Efraim.

   6) Support GRE tunneling in openvswitch, from Pravin B Shelar.

   7) Adjust SOCK_MIN_RCVBUF and SOCK_MIN_SNDBUF for modern times, from
      Daniel Borkmann and Eric Dumazet.

   8) Allow controlling of TCP quickack behavior on a per-route basis,
      from Cong Wang.

   9) Several bug fixes and improvements to vxlan from Stephen
      Hemminger, Pravin B Shelar, and Mike Rapoport.  In particular,
      support receiving on multiple UDP ports.

  10) Major cleanups, particular in the area of debugging and cookie
      lifetime handline, to the SCTP protocol code.  From Daniel
      Borkmann.

  11) Allow packets to cross network namespaces when traversing tunnel
      devices.  From Nicolas Dichtel.

  12) Allow monitoring netlink traffic via AF_PACKET sockets, in a
      manner akin to how we monitor real network traffic via ptype_all.
      From Daniel Borkmann.

  13) Several bug fixes and improvements for the new alx device driver,
      from Johannes Berg.

  14) Fix scalability issues in the netem packet scheduler's time queue,
      by using an rbtree.  From Eric Dumazet.

  15) Several bug fixes in TCP loss recovery handling, from Yuchung
      Cheng.

  16) Add support for GSO segmentation of MPLS packets, from Simon
      Horman.

  17) Make network notifiers have a real data type for the opaque
      pointer that's passed into them.  Use this to properly handle
      network device flag changes in arp_netdev_event().  From Jiri
      Pirko and Timo Teräs.

  18) Convert several drivers over to module_pci_driver(), from Peter
      Huewe.

  19) tcp_fixup_rcvbuf() can loop 500 times over loopback, just use a
      O(1) calculation instead.  From Eric Dumazet.

  20) Support setting of explicit tunnel peer addresses in ipv6, just
      like ipv4.  From Nicolas Dichtel.

  21) Protect x86 BPF JIT against spraying attacks, from Eric Dumazet.

  22) Prevent a single high rate flow from overruning an individual cpu
      during RX packet processing via selective flow shedding.  From
      Willem de Bruijn.

  23) Don't use spinlocks in TCP md5 signing fast paths, from Eric
      Dumazet.

  24) Don't just drop GSO packets which are above the TBF scheduler's
      burst limit, chop them up so they are in-bounds instead.  Also
      from Eric Dumazet.

  25) VLAN offloads are missed when configured on top of a bridge, fix
      from Vlad Yasevich.

  26) Support IPV6 in ping sockets.  From Lorenzo Colitti.

  27) Receive flow steering targets should be updated at poll() time
      too, from David Majnemer.

  28) Fix several corner case regressions in PMTU/redirect handling due
      to the routing cache removal, from Timo Teräs.

  29) We have to be mindful of ipv4 mapped ipv6 sockets in
      upd_v6_push_pending_frames().  From Hannes Frederic Sowa.

  30) Fix L2TP sequence number handling bugs, from James Chapman."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1214 commits)
  drivers/net: caif: fix wrong rtnl_is_locked() usage
  drivers/net: enic: release rtnl_lock on error-path
  vhost-net: fix use-after-free in vhost_net_flush
  net: mv643xx_eth: do not use port number as platform device id
  net: sctp: confirm route during forward progress
  virtio_net: fix race in RX VQ processing
  virtio: support unlocked queue poll
  net/cadence/macb: fix bug/typo in extracting gem_irq_read_clear bit
  Documentation: Fix references to defunct linux-net@vger.kernel.org
  net/fs: change busy poll time accounting
  net: rename low latency sockets functions to busy poll
  bridge: fix some kernel warning in multicast timer
  sfc: Fix memory leak when discarding scattered packets
  sit: fix tunnel update via netlink
  dt:net:stmmac: Add dt specific phy reset callback support.
  dt:net:stmmac: Add support to dwmac version 3.610 and 3.710
  dt:net:stmmac: Allocate platform data only if its NULL.
  net:stmmac: fix memleak in the open method
  ipv6: rt6_check_neigh should successfully verify neigh if no NUD information are available
  net: ipv6: fix wrong ping_v6_sendmsg return value
  ...

1 files changed, 428 insertions, 0 deletions

diff --git a/drivers/net/wireless/cw1200/debug.c b/drivers/net/wireless/cw1200/debug.c
new file mode 100644
index 000000000000..e323b4d54338
--- /dev/null
+++ b/drivers/net/wireless/cw1200/debug.c
@@ -0,0 +1,428 @@
+/*
+ * mac80211 glue code for mac80211 ST-Ericsson CW1200 drivers
+ * DebugFS code
+ *
+ * Copyright (c) 2010, ST-Ericsson
+ * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include "cw1200.h"
+#include "debug.h"
+#include "fwio.h"
+
+/* join_status */
+static const char * const cw1200_debug_join_status[] = {
+	"passive",
+	"monitor",
+	"station (joining)",
+	"station (not authenticated yet)",
+	"station",
+	"adhoc",
+	"access point",
+};
+
+/* WSM_JOIN_PREAMBLE_... */
+static const char * const cw1200_debug_preamble[] = {
+	"long",
+	"short",
+	"long on 1 and 2 Mbps",
+};
+
+
+static const char * const cw1200_debug_link_id[] = {
+	"OFF",
+	"REQ",
+	"SOFT",
+	"HARD",
+};
+
+static const char *cw1200_debug_mode(int mode)
+{
+	switch (mode) {
+	case NL80211_IFTYPE_UNSPECIFIED:
+		return "unspecified";
+	case NL80211_IFTYPE_MONITOR:
+		return "monitor";
+	case NL80211_IFTYPE_STATION:
+		return "station";
+	case NL80211_IFTYPE_ADHOC:
+		return "adhoc";
+	case NL80211_IFTYPE_MESH_POINT:
+		return "mesh point";
+	case NL80211_IFTYPE_AP:
+		return "access point";
+	case NL80211_IFTYPE_P2P_CLIENT:
+		return "p2p client";
+	case NL80211_IFTYPE_P2P_GO:
+		return "p2p go";
+	default:
+		return "unsupported";
+	}
+}
+
+static void cw1200_queue_status_show(struct seq_file *seq,
+				     struct cw1200_queue *q)
+{
+	int i;
+	seq_printf(seq, "Queue       %d:\n", q->queue_id);
+	seq_printf(seq, "  capacity: %zu\n", q->capacity);
+	seq_printf(seq, "  queued:   %zu\n", q->num_queued);
+	seq_printf(seq, "  pending:  %zu\n", q->num_pending);
+	seq_printf(seq, "  sent:     %zu\n", q->num_sent);
+	seq_printf(seq, "  locked:   %s\n", q->tx_locked_cnt ? "yes" : "no");
+	seq_printf(seq, "  overfull: %s\n", q->overfull ? "yes" : "no");
+	seq_puts(seq,   "  link map: 0-> ");
+	for (i = 0; i < q->stats->map_capacity; ++i)
+		seq_printf(seq, "%.2d ", q->link_map_cache[i]);
+	seq_printf(seq, "<-%zu\n", q->stats->map_capacity);
+}
+
+static void cw1200_debug_print_map(struct seq_file *seq,
+				   struct cw1200_common *priv,
+				   const char *label,
+				   u32 map)
+{
+	int i;
+	seq_printf(seq, "%s0-> ", label);
+	for (i = 0; i < priv->tx_queue_stats.map_capacity; ++i)
+		seq_printf(seq, "%s ", (map & BIT(i)) ? "**" : "..");
+	seq_printf(seq, "<-%zu\n", priv->tx_queue_stats.map_capacity - 1);
+}
+
+static int cw1200_status_show(struct seq_file *seq, void *v)
+{
+	int i;
+	struct list_head *item;
+	struct cw1200_common *priv = seq->private;
+	struct cw1200_debug_priv *d = priv->debug;
+
+	seq_puts(seq,   "CW1200 Wireless LAN driver status\n");
+	seq_printf(seq, "Hardware:   %d.%d\n",
+		   priv->wsm_caps.hw_id,
+		   priv->wsm_caps.hw_subid);
+	seq_printf(seq, "Firmware:   %s %d.%d\n",
+		   cw1200_fw_types[priv->wsm_caps.fw_type],
+		   priv->wsm_caps.fw_ver,
+		   priv->wsm_caps.fw_build);
+	seq_printf(seq, "FW API:     %d\n",
+		   priv->wsm_caps.fw_api);
+	seq_printf(seq, "FW caps:    0x%.4X\n",
+		   priv->wsm_caps.fw_cap);
+	seq_printf(seq, "FW label:  '%s'\n",
+		   priv->wsm_caps.fw_label);
+	seq_printf(seq, "Mode:       %s%s\n",
+		   cw1200_debug_mode(priv->mode),
+		   priv->listening ? " (listening)" : "");
+	seq_printf(seq, "Join state: %s\n",
+		   cw1200_debug_join_status[priv->join_status]);
+	if (priv->channel)
+		seq_printf(seq, "Channel:    %d%s\n",
+			   priv->channel->hw_value,
+			   priv->channel_switch_in_progress ?
+			   " (switching)" : "");
+	if (priv->rx_filter.promiscuous)
+		seq_puts(seq,   "Filter:     promisc\n");
+	else if (priv->rx_filter.fcs)
+		seq_puts(seq,   "Filter:     fcs\n");
+	if (priv->rx_filter.bssid)
+		seq_puts(seq,   "Filter:     bssid\n");
+	if (!priv->disable_beacon_filter)
+		seq_puts(seq,   "Filter:     beacons\n");
+
+	if (priv->enable_beacon ||
+	    priv->mode == NL80211_IFTYPE_AP ||
+	    priv->mode == NL80211_IFTYPE_ADHOC ||
+	    priv->mode == NL80211_IFTYPE_MESH_POINT ||
+	    priv->mode == NL80211_IFTYPE_P2P_GO)
+		seq_printf(seq, "Beaconing:  %s\n",
+			   priv->enable_beacon ?
+			   "enabled" : "disabled");
+
+	for (i = 0; i < 4; ++i)
+		seq_printf(seq, "EDCA(%d):    %d, %d, %d, %d, %d\n", i,
+			   priv->edca.params[i].cwmin,
+			   priv->edca.params[i].cwmax,
+			   priv->edca.params[i].aifns,
+			   priv->edca.params[i].txop_limit,
+			   priv->edca.params[i].max_rx_lifetime);
+
+	if (priv->join_status == CW1200_JOIN_STATUS_STA) {
+		static const char *pm_mode = "unknown";
+		switch (priv->powersave_mode.mode) {
+		case WSM_PSM_ACTIVE:
+			pm_mode = "off";
+			break;
+		case WSM_PSM_PS:
+			pm_mode = "on";
+			break;
+		case WSM_PSM_FAST_PS:
+			pm_mode = "dynamic";
+			break;
+		}
+		seq_printf(seq, "Preamble:   %s\n",
+			   cw1200_debug_preamble[priv->association_mode.preamble]);
+		seq_printf(seq, "AMPDU spcn: %d\n",
+			   priv->association_mode.mpdu_start_spacing);
+		seq_printf(seq, "Basic rate: 0x%.8X\n",
+			   le32_to_cpu(priv->association_mode.basic_rate_set));
+		seq_printf(seq, "Bss lost:   %d beacons\n",
+			   priv->bss_params.beacon_lost_count);
+		seq_printf(seq, "AID:        %d\n",
+			   priv->bss_params.aid);
+		seq_printf(seq, "Rates:      0x%.8X\n",
+			   priv->bss_params.operational_rate_set);
+		seq_printf(seq, "Powersave:  %s\n", pm_mode);
+	}
+	seq_printf(seq, "HT:         %s\n",
+		   cw1200_is_ht(&priv->ht_info) ? "on" : "off");
+	if (cw1200_is_ht(&priv->ht_info)) {
+		seq_printf(seq, "Greenfield: %s\n",
+			   cw1200_ht_greenfield(&priv->ht_info) ? "yes" : "no");
+		seq_printf(seq, "AMPDU dens: %d\n",
+			   cw1200_ht_ampdu_density(&priv->ht_info));
+	}
+	seq_printf(seq, "RSSI thold: %d\n",
+		   priv->cqm_rssi_thold);
+	seq_printf(seq, "RSSI hyst:  %d\n",
+		   priv->cqm_rssi_hyst);
+	seq_printf(seq, "Long retr:  %d\n",
+		   priv->long_frame_max_tx_count);
+	seq_printf(seq, "Short retr: %d\n",
+		   priv->short_frame_max_tx_count);
+	spin_lock_bh(&priv->tx_policy_cache.lock);
+	i = 0;
+	list_for_each(item, &priv->tx_policy_cache.used)
+		++i;
+	spin_unlock_bh(&priv->tx_policy_cache.lock);
+	seq_printf(seq, "RC in use:  %d\n", i);
+
+	seq_puts(seq, "\n");
+	for (i = 0; i < 4; ++i) {
+		cw1200_queue_status_show(seq, &priv->tx_queue[i]);
+		seq_puts(seq, "\n");
+	}
+
+	cw1200_debug_print_map(seq, priv, "Link map:   ",
+			       priv->link_id_map);
+	cw1200_debug_print_map(seq, priv, "Asleep map: ",
+			       priv->sta_asleep_mask);
+	cw1200_debug_print_map(seq, priv, "PSPOLL map: ",
+			       priv->pspoll_mask);
+
+	seq_puts(seq, "\n");
+
+	for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) {
+		if (priv->link_id_db[i].status) {
+			seq_printf(seq, "Link %d:     %s, %pM\n",
+				   i + 1,
+				   cw1200_debug_link_id[priv->link_id_db[i].status],
+				   priv->link_id_db[i].mac);
+		}
+	}
+
+	seq_puts(seq, "\n");
+
+	seq_printf(seq, "BH status:  %s\n",
+		   atomic_read(&priv->bh_term) ? "terminated" : "alive");
+	seq_printf(seq, "Pending RX: %d\n",
+		   atomic_read(&priv->bh_rx));
+	seq_printf(seq, "Pending TX: %d\n",
+		   atomic_read(&priv->bh_tx));
+	if (priv->bh_error)
+		seq_printf(seq, "BH errcode: %d\n",
+			   priv->bh_error);
+	seq_printf(seq, "TX bufs:    %d x %d bytes\n",
+		   priv->wsm_caps.input_buffers,
+		   priv->wsm_caps.input_buffer_size);
+	seq_printf(seq, "Used bufs:  %d\n",
+		   priv->hw_bufs_used);
+	seq_printf(seq, "Powermgmt:  %s\n",
+		   priv->powersave_enabled ? "on" : "off");
+	seq_printf(seq, "Device:     %s\n",
+		   priv->device_can_sleep ? "asleep" : "awake");
+
+	spin_lock(&priv->wsm_cmd.lock);
+	seq_printf(seq, "WSM status: %s\n",
+		   priv->wsm_cmd.done ? "idle" : "active");
+	seq_printf(seq, "WSM cmd:    0x%.4X (%td bytes)\n",
+		   priv->wsm_cmd.cmd, priv->wsm_cmd.len);
+	seq_printf(seq, "WSM retval: %d\n",
+		   priv->wsm_cmd.ret);
+	spin_unlock(&priv->wsm_cmd.lock);
+
+	seq_printf(seq, "Datapath:   %s\n",
+		   atomic_read(&priv->tx_lock) ? "locked" : "unlocked");
+	if (atomic_read(&priv->tx_lock))
+		seq_printf(seq, "TXlock cnt: %d\n",
+			   atomic_read(&priv->tx_lock));
+
+	seq_printf(seq, "TXed:       %d\n",
+		   d->tx);
+	seq_printf(seq, "AGG TXed:   %d\n",
+		   d->tx_agg);
+	seq_printf(seq, "MULTI TXed: %d (%d)\n",
+		   d->tx_multi, d->tx_multi_frames);
+	seq_printf(seq, "RXed:       %d\n",
+		   d->rx);
+	seq_printf(seq, "AGG RXed:   %d\n",
+		   d->rx_agg);
+	seq_printf(seq, "TX miss:    %d\n",
+		   d->tx_cache_miss);
+	seq_printf(seq, "TX align:   %d\n",
+		   d->tx_align);
+	seq_printf(seq, "TX burst:   %d\n",
+		   d->tx_burst);
+	seq_printf(seq, "TX TTL:     %d\n",
+		   d->tx_ttl);
+	seq_printf(seq, "Scan:       %s\n",
+		   atomic_read(&priv->scan.in_progress) ? "active" : "idle");
+
+	return 0;
+}
+
+static int cw1200_status_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, &cw1200_status_show,
+		inode->i_private);
+}
+
+static const struct file_operations fops_status = {
+	.open = cw1200_status_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.owner = THIS_MODULE,
+};
+
+static int cw1200_counters_show(struct seq_file *seq, void *v)
+{
+	int ret;
+	struct cw1200_common *priv = seq->private;
+	struct wsm_mib_counters_table counters;
+
+	ret = wsm_get_counters_table(priv, &counters);
+	if (ret)
+		return ret;
+
+#define PUT_COUNTER(tab, name) \
+	seq_printf(seq, "%s:" tab "%d\n", #name, \
+		__le32_to_cpu(counters.name))
+
+	PUT_COUNTER("\t\t", plcp_errors);
+	PUT_COUNTER("\t\t", fcs_errors);
+	PUT_COUNTER("\t\t", tx_packets);
+	PUT_COUNTER("\t\t", rx_packets);
+	PUT_COUNTER("\t\t", rx_packet_errors);
+	PUT_COUNTER("\t",   rx_decryption_failures);
+	PUT_COUNTER("\t\t", rx_mic_failures);
+	PUT_COUNTER("\t",   rx_no_key_failures);
+	PUT_COUNTER("\t",   tx_multicast_frames);
+	PUT_COUNTER("\t",   tx_frames_success);
+	PUT_COUNTER("\t",   tx_frame_failures);
+	PUT_COUNTER("\t",   tx_frames_retried);
+	PUT_COUNTER("\t",   tx_frames_multi_retried);
+	PUT_COUNTER("\t",   rx_frame_duplicates);
+	PUT_COUNTER("\t\t", rts_success);
+	PUT_COUNTER("\t\t", rts_failures);
+	PUT_COUNTER("\t\t", ack_failures);
+	PUT_COUNTER("\t",   rx_multicast_frames);
+	PUT_COUNTER("\t",   rx_frames_success);
+	PUT_COUNTER("\t",   rx_cmac_icv_errors);
+	PUT_COUNTER("\t\t", rx_cmac_replays);
+	PUT_COUNTER("\t",   rx_mgmt_ccmp_replays);
+
+#undef PUT_COUNTER
+
+	return 0;
+}
+
+static int cw1200_counters_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, &cw1200_counters_show,
+		inode->i_private);
+}
+
+static const struct file_operations fops_counters = {
+	.open = cw1200_counters_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.owner = THIS_MODULE,
+};
+
+static ssize_t cw1200_wsm_dumps(struct file *file,
+	const char __user *user_buf, size_t count, loff_t *ppos)
+{
+	struct cw1200_common *priv = file->private_data;
+	char buf[1];
+
+	if (!count)
+		return -EINVAL;
+	if (copy_from_user(buf, user_buf, 1))
+		return -EFAULT;
+
+	if (buf[0] == '1')
+		priv->wsm_enable_wsm_dumps = 1;
+	else
+		priv->wsm_enable_wsm_dumps = 0;
+
+	return count;
+}
+
+static const struct file_operations fops_wsm_dumps = {
+	.open = simple_open,
+	.write = cw1200_wsm_dumps,
+	.llseek = default_llseek,
+};
+
+int cw1200_debug_init(struct cw1200_common *priv)
+{
+	int ret = -ENOMEM;
+	struct cw1200_debug_priv *d = kzalloc(sizeof(struct cw1200_debug_priv),
+			GFP_KERNEL);
+	priv->debug = d;
+	if (!d)
+		return ret;
+
+	d->debugfs_phy = debugfs_create_dir("cw1200",
+					    priv->hw->wiphy->debugfsdir);
+	if (!d->debugfs_phy)
+		goto err;
+
+	if (!debugfs_create_file("status", S_IRUSR, d->debugfs_phy,
+				 priv, &fops_status))
+		goto err;
+
+	if (!debugfs_create_file("counters", S_IRUSR, d->debugfs_phy,
+				 priv, &fops_counters))
+		goto err;
+
+	if (!debugfs_create_file("wsm_dumps", S_IWUSR, d->debugfs_phy,
+				 priv, &fops_wsm_dumps))
+		goto err;
+
+	return 0;
+
+err:
+	priv->debug = NULL;
+	debugfs_remove_recursive(d->debugfs_phy);
+	kfree(d);
+	return ret;
+}
+
+void cw1200_debug_release(struct cw1200_common *priv)
+{
+	struct cw1200_debug_priv *d = priv->debug;
+	if (d) {
+		debugfs_remove_recursive(d->debugfs_phy);
+		priv->debug = NULL;
+		kfree(d);
+	}
+}