Link state acks triggered from the receive path is done before
the last received packet have been processed by the link layer.
The effect of this is that the last received packet will not be
included in the ack. This causes problems if the link window is
set to TIPC_MIN_LINK_WIN, where the ack interval will be equal to
the link tolerance, and the link enters a stop-and-go behavior.
We move the ack logic to after link state processing, just before
the packet is delivered to higher layers.
Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: Carl Sigurjonsson <carl.sigurjonsson@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This is a cosmetic change, separating message delivery from the
link state processing.
Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Always store in snt_synack the time at which the server received the
first client SYN and attempted to send the first SYNACK.

Recent commit aa27fc50 ("tcp: tcp_v[46]_conn_request: fix snt_synack
initialization") resolved an inconsistency between IPv4 and IPv6 in
the initialization of snt_synack. This commit brings back the idea
from 843f4a55 (tcp: use tcp_v4_send_synack on first SYN-ACK), which
was going for the original behavior of snt_synack from the commit
where it was added in 9ad7c049 ("tcp: RFC2988bis + taking RTT
sample from 3WHS for the passive open side") in v3.1.

In addition to being simpler (and probably a tiny bit faster),
unconditionally storing the time of the first SYNACK attempt has been
useful because it allows calculating a performance metric quantifying
how long it took to establish a passive TCP connection.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Cc: Octavian Purdila <octavian.purdila@intel.com>
Cc: Jerry Chu <hkchu@google.com>
Acked-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ondrej Zary says:

====================
tlan: Link handling improvements and Olicom fixes

This patch series improves link handling in tlan driver, allowing the
cable to be (un)plugged anytime and NetworkManager to work properly.

Also there are some bugfixes related to Olicom OC-2326 card.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

When using internal 10 Mbps PHY, isolate the external PHY from MII bus.
External PHY must be kept powered up because it passes TX from tlan chip to
network.

This fixes weird link-loss problems under load with OC-2326 card at 10 Mbps.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

pci_disable_device() is called in _suspend but there's no corresponding
pci_enable_device() in _resume.
This causes "disabling already-disabled device" warning on 2nd suspend.

Add pci_enable_device() call to _resume to fix this problem.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

In tlan_reset_adapter, we disable internal PHY when an external one is used.
On cards which use internal PHY in 10 Mbps mode, we enable it later when
setting 10 Mbps mode but it does not really work (PHY fails to reset).
Leave it enabled instead.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a timeout to prevent infinite loop waiting for PHY to reset.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Reduce the autonegotiation poll interval from 8 seconds to 2.
This greatly reduces the time needed to detect link presence,
especially on Olicom cards at 10 Mbps (two autonegoatiations required).
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Remove excess printks when the link is down.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

When link is lost on a card which uses internal PHY for 10 Mbit speeds,
restart autonegotiation to allow switching between 10 and 100 Mbps speeds.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Olicom OC-2325 and OC-2326 cards have the MAC address byte-swapped in EEPROM.
Byte-swap the MAC address if it's located at offset 0xF8.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add basic ethtool support to tlan driver:
 - driver info  - link detect (this allows NetworkManager to detect carrier)
 - EEPROM read
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Enable old link monitoring code and modify it:
 - control LINK LED
 - use separate timer so it does not interfere with ACT LED

Tested with Olicom OC-2326.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Olicom OC-2325 and OC-2326 ethernet cards have an activity LED but it does not
work with tlan driver as it's not enabled. Enable it.
Tested with OC-2326.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

kasprintf combines kmalloc and sprintf, and takes care of the size
calculation itself.

The semantic patch that makes this change is as follows:

// <smpl>
@@
expression a,flag;
expression list args;
statement S;
@@

  a =
-  \(kmalloc\|kzalloc\)(...,flag)
+  kasprintf(flag,args)
  <... when != a
  if (a == NULL || ...) S
  ...>
- sprintf(a,args);
// </smpl>
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

Stefan Sørensen says:

====================
Add ptp vlan support

This patch series adds functionality for running ptp/ieee1588 over vlan.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This allows applications to enable hardware timestamping without being aware
of it being a vlan device and figuring out the real device.
Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This extends the ptp bpf to also match ptp over ip over vlan packets. The ptp
classes are changed to orthogonal bitfields representing version, transport
and vlan values to simplify matching.
Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace two switch statements enumerating all valid ptp classes with an if
statement matching for not PTP_CLASS_NONE.
Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Daniel Borkmann says:

====================
Misc SCTP updates

Daniel Borkmann (2):
  net: sctp: improve timer slack calculation for transport HBs
  net: sctp: only warn in proc_sctp_do_alpha_beta if write
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Neil Horman <nhorman@tuxdriver.com>

Only warn if the value is written to alpha or beta. We don't care
emitting a one-time warning when only reading it.
Reported-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Reviewed-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

RFC4960, section 8.3 says:

  On an idle destination address that is allowed to heartbeat,
  it is recommended that a HEARTBEAT chunk is sent once per RTO
  of that destination address plus the protocol parameter
  'HB.interval', with jittering of +/- 50% of the RTO value,
  and exponential backoff of the RTO if the previous HEARTBEAT
  is unanswered.

Currently, we calculate jitter via sctp_jitter() function first,
and then add its result to the current RTO for the new timeout:

  TMO = RTO + (RAND() % RTO) - (RTO / 2)
              `------------------------^-=> sctp_jitter()

Instead, we can just simplify all this by directly calculating:

  TMO = (RTO / 2) + (RAND() % RTO)

With the help of prandom_u32_max(), we don't need to open code
our own global PRNG, but can instead just make use of the per
CPU implementation of prandom with better quality numbers. Also,
we can now spare us the conditional for divide by zero check
since no div or mod operation needs to be used. Note that
prandom_u32_max() won't emit the same result as a mod operation,
but we really don't care here as we only want to have a random
number scaled into RTO interval.

Note, exponential RTO backoff is handeled elsewhere, namely in
sctp_do_8_2_transport_strike().
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Sathya Perla says:

====================
be2net: patch set

v2 change: merged 2 lines into one in patch 4

Patch 1 refactors be_cmd_get_profile_config() routine to reduce
code duplication by using the be_cmd_notify_wait() routine, instead
of using a separate variant of the code for MBOX and MCCQ.

Patch 2 introduces the required FW-cmd code in the PF to query
RSS support on a VF. This is in preparation for patch 3.

Patch 3 adds support for the PF driver to re-configure the resource
distribution in FW based on the number of VFs enabled by the user. When
the user is not interested in enabling VFs, all resources of a port are
set-aside for the PF. If less than maximum number of VFs are enabled, then
each VF gets a better share of the resources and can now enable RSS (if
the interface supports it.)

Patch 4 is a minor fix to re-enable HW vlan filtering as soon as the number
of vlans programmed is within the HW limit.

Please consider applying to net-next tree. Thanks!
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

While adding vlans, when the HW limit of vlan filters is reached, the
driver enables vlan promiscuous mode.
Similarily, while removing vlans, the driver must re-enable HW filtering
as soon as the number of vlan filters is within the HW limit.
Signed-off-by: Kalesh AP <kalesh.purayil@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If SR-IOV is enabled in the adapter, the FW distributes queue resources
evenly across the PF and it's VFs. If the user is not interested in enabling
VFs, the queues set aside for VFs are wasted.
This patch adds support for the PF driver to re-configure the resource
distribution in FW based on the number of VFs enabled by the user.
This also allows for supporting RSS queues on VFs, when less number of VFs
are enabled per PF. When maximum number of VFs are enabled, each VF typically
gets only one RXQ.
Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The PF driver must query the FW for VF's interface capabilities
to know if the VF is RSS capable or not.
This patch is in preparation for enabling RSS on VFs on Skyhawk-R.
Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix be_cmd_get_profile_cmd() to use be_cmd_notify_wait() routine,
which uses MBOX if MCCQ has not been created. Doing this reduces
code duplication; we don't need the _mbox/_mccq() variants anymore.
Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix checkpatch warning:
WARNING: kfree(NULL) is safe this check is probably not required

Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since consume_skb() (and hence dev_kfree_skb() macro) checks the passed pointer
for NULL, there's no need to check for NULL before invoking dev_kfree_skb().
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Prashant Sreedharan <prashant@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Harish Patil says:

====================
qlcnic: Enhance Tx timeout debug data collection.

The following set of patches are for enhancing Tx timeout debug collection

- Collect a firmware dump on first Tx timeout if netif_msg_tx_err() is set
- Log Receive and Status ring info on Tx timeout, in addition to Tx ring info
- Log additional Tx ring info if netif_msg_tx_err() is set
- Update driver version to 5.3.61

Please apply this series to net-next.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Harish Patil <harish.patil@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

- Collect a firmware dump on first Tx timeout if netif_msg_tx_err() is set
- Log Receive and Status ring info on Tx timeout, in addition to Tx ring info
- Log additional Tx ring info if netif_msg_tx_err() is set
Signed-off-by: Harish Patil <harish.patil@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

based on checkpatch:
"debugfs_remove_recursive(NULL) is safe this check is probably not required"

Cc: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c: remove unnecessary null test before debugfs_remove_recursive

Fix checkpatch warning:
"WARNING: debugfs_remove_recursive(NULL) is safe this check is probably not required"

Cc: Hariprasad S <hariprasad@chelsio.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

When an UDP application switches from AF_INET to AF_INET6 sockets, we
have a small performance degradation for IPv4 communications because of
extra cache line misses to access ipv6only information.

This can also be noticed for TCP listeners, as ipv6_only_sock() is also
used from __inet_lookup_listener()->compute_score()

This is magnified when SO_REUSEPORT is used.

Move ipv6only into struct sock_common so that it is available at
no extra cost in lookups.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2014-07-01

This series contains updates to i40e, i40evf, igb and ixgbe.

Shannon adds the Base Address High and Low to the admin queue structure
to simplify the logic in the configuration routines.  Also adds code to
clear all queues and interrupts to help clean up after a PXE or other
early boot activity.

Kevin fixes mask assignment value since -1 cannot be used for unsigned
integer types.

Mitch fixes an issue where in some circumstances the reply from the PF
would come back before we were able to properly modify the admin queue
pending and required flags.  This would mess up the flags and put the
driver in an indeterminate state, so fix this by simply setting the flags
before sending the request to the admin queue.  Also changes the branding
string for i40evf to reduce confusion and to match up with our other
marketing materials.

Kamil adds a new variable defining admin send queue (ASQ) command write
back timeout to allow for dynamic modification of this timeout.

Anjali fix a bug in the flow director filter replay logic, so that we
call a replay after a sideband reset correctly.

Jesse adds code to initialize all members of the context descriptor to
prevent possible stale data.

Christopher fixes i40e to prevent writing to reserved bits, since the
queue index is only 0-127.

Jacob removes the unneeded header export.h from the i40e PTP code.
Fixes ixgbe PTP code where the PPS signal was not correct, as it
generates a one half HZ clock signal, it only generates one level
change per second.  To generate a full clock, we need two level changes
per second.

Todd provides a fix for igb to bring up link when the PHY has powered
up, which was reported by Jeff Westfahl.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This limitation maybe had some reason in the past, but now there is not
one -> removing this.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Veaceslav Falico <vfalico@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Hariprasad Shenai says:

====================
cxgb4: Fix for PCI passthrough and some Misc. fixes

This patch series fixes probe failure in VM when PF is exposed through PCI
Passthrough. Adds support to use firmware interface to get BAR0 value.
Replace the backdoor mechanism to access the HW memory with PCIe Window method
which fixes memory I/O. Also adds device ID of few more adapters for cxgb4 and
cxgb4vf driver.

The patches series is created against 'net-next' tree.
And includes patches on cxgb4, cxgb4vf and iw_cxgb4 driver.

Since this patch-series contains mainly cxgb4 related changes, we would like to
request this patch series to get merged via David Miller's 'net-next' tree.

We have included all the maintainers of respective drivers. Kindly review the
change and let us know in case of any review comments.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>