The following series implements support for the new AMD 10Gb Ethernet
driver (amd-xgbe). It includes the 10Gb Ethernet driver as well as
a 10Gb Ethernet PHY driver.
This patch series is based on net-next.
Changes in V3:
- Add OF dependency to the phylib driver configuration
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This is a collection of changes discovered while bringing a PXA270 based board
(Arcom ZEUS) with a Davicom DM9000A/B up to a more recent kernel (from 2.6.xx).
This addresses all of my earlier issues (August 2013) listed here:
Andrew Ruder [Wed, 4 Jun 2014 22:28:49 +0000 (17:28 -0500)]
dm9000: avoid sleeping in dm9000_timeout callback
On the DM9000B, dm9000_msleep() is called during the dm9000_timeout()
routine. Since dm9000_timeout() holds the main spinlock through the
entire routine, mdelay() needs to be used rather than msleep().
Furthermore, the mutex_lock()/mutex_unlock() should be avoided so as to
not sleep with spinlocks held.
Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Ruder [Wed, 4 Jun 2014 22:28:48 +0000 (17:28 -0500)]
dm9000: handle initial link status
On the DM9000A/DM9000B force the initial check of the link status. The
DM9000A/B has a link status changed event and this interrupt bit isn't
always set out of reset when a cable is plugged in. This results in the
driver not seeing the cable attached link status until the cable is
removed and plugged in again.
Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Ruder [Wed, 4 Jun 2014 22:28:47 +0000 (17:28 -0500)]
dm9000: remove redundant ISR status clear
Since dm9000_interrupt() is already reading/clearing every set bit in
DM9000_ISR, this additional clear in dm9000_rx() (which is only called
by dm9000_interrupt()) is unnecessary and can be removed.
Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Ruder [Wed, 4 Jun 2014 22:28:46 +0000 (17:28 -0500)]
dm9000: clean up edge-triggered irq compatibility
DM9000 uses level-triggered interrupts. Some systems (PXA270) only
support edge-triggered interrupts on GPIOs. Some changes are necessary
to ensure that interrupts are not triggered while the GPIO interrupt is
masked or we will miss the interrupt forever.
* Make some helper functions called dm9000_mask_interrupts() and
dm9000_unmask_interrupts() for readability.
* dm9000_init_dm9000(): ensure that this function always leaves interrupts
masked regardless of the state when it entered the function. This is
primarily to support the situation in dm9000_open where the logic used
to go:
If an interrupt occurred between unmasking the interrupt and
requesting the irq, it would be missed forever as the edge event would
never be seen by the GPIO hardware in the PXA270. This allows us to
change the logic to:
and a later commit added a bug-fix to always reset the chip twice:
09ee9f8 dm9000: Implement full reset of DM9000 network device
Unfortunately, since the changes in 6741f40 were made by replacing the
dm9000_probe dm9000_reset with the adjusted iow(), the changes in 09ee9f8 were not incorporated into the dm9000_probe reset.
Furthermore, it bypassed the requisite reset-delay causing some boards
to get at least one "read wrong id ..." dev_err message during
dm9000_probe.
Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Ruder [Wed, 4 Jun 2014 22:28:44 +0000 (17:28 -0500)]
dm9000: acquire irq flags from device tree
The DM9000 supports both active high interrupts and active low interrupts.
This is configured via the attached EEPROM. In the device-tree case, make sure
that the DM9000 driver passes the correct flags to request_irq.
Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Simon Horman [Tue, 3 Jun 2014 23:53:17 +0000 (08:53 +0900)]
MPLS: Use mpls_features to activate software MPLS GSO segmentation
If an MPLS packet requires segmentation then use mpls_features
to determine if the software implementation should be used.
As no driver advertises MPLS GSO segmentation this will always be
the case.
I had not noticed that this was necessary before as software MPLS GSO
segmentation was already being used in my test environment. I believe that
the reason for that is the skbs in question always had fragments and the
driver I used does not advertise NETIF_F_FRAGLIST (which seems to be the
case for most drivers). Thus software segmentation was activated by
skb_gso_ok().
This introduces the overhead of an extra call to skb_network_protocol()
in the case where where CONFIG_NET_MPLS_GSO is set and
skb->ip_summed == CHECKSUM_NONE.
Thanks to Jesse Gross for prompting me to investigate this.
Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 5 Jun 2014 20:04:31 +0000 (13:04 -0700)]
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next
Jeff Kirsher says:
====================
Intel Wired LAN Driver Updates 2014-06-05
This series contains updates to i40e and i40evf.
Jesse fixes an issue reported by Dave Jones where a couple of FD checks
ended up using bitwise OR where it should have been bitwise AND.
Neerav removes unused defines and macros for receive LRO. Fix the driver
from allowing the user to set a larger MTU size that the hardware was
being configured to support. Refactors send version which moves code in
two places into a small helper function.
Kamil modifies register diagnostics since register ranges can vary among
the different NVMs to avoid false test results. So now we try to identify
the full range and use it for a register test and if we fail to define the
proper register range, we will only test the first register from that
group. Then removes the check for large buffer since this was added in the
case this structure changed in the future, since the AQ definition is now
mature enough that this check is no longer necessary.
Mitch fixes i40evf driver to allocate descriptors in groups of 32 since the
hardware requires it. Also fixes a crash when the ring size changed because
it would change the count before deallocating resources, causing the driver
to either free nonexistent buffers or leak leftover buffers. Fixed the
driver to notify the VF for all types of resets so the VF can attempt a
graceful reinit.
Shannon refactors stats collection to create a unifying stats update routine
to call the various stat collection routines. Removes rx_errors and
rx_missed stats since they were removed from the chip design. Added
missing VSI statistics that the hardware offers but are not apart of the
standard netdev stats.
v2: dropped patch "i40e: Allow disabling of DCB via debugfs" from Neerav
based on feedback from David Miller.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Shannon Nelson [Wed, 23 Apr 2014 04:50:20 +0000 (04:50 +0000)]
i40e: add missing VSI statistics
Add a couple more statistics that the hardware offers but aren't part
of the standard netdev stats.
Change-ID: I201db2898f2c284aee3d9631470bc5edd349e9a5 Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Shannon Nelson [Wed, 23 Apr 2014 04:50:19 +0000 (04:50 +0000)]
i40e/i40evf: remove rx_errors and rx_missed
The rx_errors (GLV_REPC) and rx_missed (GLV_RMPC) were removed
from the chip design.
Change-ID: Ifdeb69c90feac64ec95c36d3d32c75e3a06de3b7 Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Shannon Nelson [Wed, 23 Apr 2014 04:50:18 +0000 (04:50 +0000)]
i40e: refactor stats collection
Pull the PF stat collection out of the VSI collection routine, and
add a unifying stats update routine to call the various stat collection
routines.
Change-ID: I224192455bb3a6e5dc0a426935e67dffc123e306 Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Mitch Williams [Wed, 23 Apr 2014 04:50:11 +0000 (04:50 +0000)]
i40e: notify VF of all types of resets
Currently, the PF driver only notifies the VFs for PF reset events.
Instead, notify the VFs for all types of resets, so they can attempt a
graceful reinit.
Change-ID: I03eb7afde25727198ef620f8b4e78bb667a11370 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Mitch Williams [Thu, 24 Apr 2014 06:41:37 +0000 (06:41 +0000)]
i40evf: fix crash when changing ring sizes
i40evf_set_ringparam was broken in several ways. First, it only changed
the size of the first ring, and second, changing the ring size would
often result in a panic because it would change the count before
deallocating resources, causing the driver to either free nonexistent
buffers, or leak leftover buffers.
Fix this by storing the descriptor count in the adapter structure, and
updating the count for each ring each time we allocate them. This
ensures that we always free the right size ring, and always end up with
the requested count when the device is (re)opened.
Change-ID: I298396cd3d452ba8509d9f2d33a93f25868a9a55 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Mitch Williams [Wed, 23 Apr 2014 04:50:08 +0000 (04:50 +0000)]
i40evf: set descriptor multiple to 32
Hardware requires descriptors to be allocated in groups of 32.
Change-ID: I752ccc96769d1bd8d3018c004b8aeff464045bf2 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Sibai Li <sibai.li@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Change-ID: I8ca6715edfa62b56837417a1c4ff68c2345dab6e Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by: Jim Young <jamesx.m.young@intel.com> Tested-by: Sibai Li <sibai.li@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
We introduced this check in case this structure changed in the future,
the AQ definition is now mature enough that this check is no longer necessary.
Change-ID: Ic66321d0a08557dc9d8cb84029185352cb534330 Signed-off-by: Kamil Krawczyk <kamil.krawczyk@intel.com> Tested-by: Jim Young <jamesx.m.young@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Register range, being subject to register diagnostic, can vary among
different NVMs. We will try to identify the full range and use it for
a register test. This is needed to avoid false test results. If we fail
to define the proper register range we will test only the first register
from that group.
Change-ID: Ieee7173c719733b61d3733177a94dc557eb7b3fd Signed-off-by: Kamil Krawczyk <kamil.krawczyk@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
A couple of FD checks ended up using bitwise OR to check
a value, which ends up always being evaluated to true.
This should fix the issue. Thanks to DaveJ for noticing
and reporting the issue!
CC: Dave Jones <davej@redhat.com> Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
WANG Cong [Mon, 2 Jun 2014 22:55:22 +0000 (15:55 -0700)]
net: use the new API kvfree()
It is available since v3.15-rc5.
Cc: Pablo Neira Ayuso <pablo@netfilter.org> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 5 Jun 2014 06:13:49 +0000 (23:13 -0700)]
Merge branch 'isdn-capi'
Tilman Schmidt says:
====================
ISDN patches for net-next (v2)
Here's v2 of the series of patches for the ISDN CAPI subsystem
prepared by Paul Bolle and reviewed by yours truly. It reflects
GregKH's review, resulting in a substantial simplification.
Please merge via net-next.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Paul Bolle [Sun, 1 Jun 2014 21:47:24 +0000 (23:47 +0200)]
isdn/capi: fix (middleware) device nodes
Since v2.4 the capi driver used the following device nodes if
"middleware" support was enabled:
/dev/capi20
/dev/capi/0
/dev/capi/1
[...]
/dev/capi20 is a character device node. /dev/capi/0 (and up) are tty
device nodes (with a different major).
This device node (naming) scheme is not documented anywhere, as far as I
know. It was originally provided by the capifs pseudo filesystem (before
udev became available). It is required for example by the pppd
capiplugin. It was supported until a few years ago. But a number of
developments broke it:
- v2.6.6 (May 2004) renamed /dev/capi20 to /dev/capi and removed the
"/" from the name of capi's tty driver. The explanation of the patch
that did this included two examples of udev rules "to restore the old
namespace";
- either udev 154 (May 2010) or udev 179 (January 2012) stopped
allowing to rename device nodes, and thus the ability to have
/dev/capi20 appear instead of /dev/capi and /dev/capi/0 (and up)
instead of /dev/capi0 (and up);
- v3.0 (July 2011) also removed capifs. That disabled another method to
create the /dev/capi/0 (and up) device nodes.
So now users need to manually tweak their setup (eg, create /dev/capi/
and fill that with symlinks) to get things working. This is all rather
hacky and only discoverable by searching the web. Fix all this by
renaming /dev/capi back to /dev/capi20, and by setting the name of the
"capi_nc" tty driver to "capi!" so the tty device nodes appear as
/dev/capi/0 (and up).
Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Tilman Schmidt <tilman@imap.cc> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Paul Bolle [Sun, 1 Jun 2014 21:47:24 +0000 (23:47 +0200)]
isdn/capi: Make verbose reporting depend on capidrv
The Kconfig symbol ISDN_DRV_AVMB1_VERBOSE_REASON is only used for
capi_info2str(). That function is only used in capidrv.c. So setting it
without setting ISDN_CAPI_CAPIDRV is pointless. Make it depend on
ISDN_CAPI_CAPIDRV, rename it to ISDN_CAPI_CAPIDRV_VERBOSE and put its
entry after ISDN_CAPI_CAPIDRV's entry.
Since this symbol seems to be primarily used for debugging, keep it off
by default. By now the last users of capidrv hopefully know all they
need to know about the reasons for disconnecting.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
Paul Bolle [Sun, 1 Jun 2014 21:47:24 +0000 (23:47 +0200)]
isdn/capi: move capi_info2str to capidrv.c
capi_info2str() is apparently meant to be of general utility. It is
actually only used in capidrv.c. So move it from capiutil.c to
capidrv.c and (obviously) stop exporting it.
And, since we're touching this, merge the two versions of this
function.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 5 Jun 2014 05:52:31 +0000 (22:52 -0700)]
Merge branch 'inet_csums'
Tom Herbert says:
====================
net: Support checksum in UDP
This patch series adds support for using checksums in UDP tunnels. With
this it is possible that two or more checksums may be set within the
same packet and we would like to do that efficiently.
This series also creates some new helper functions to be used by various
tunnel protocol implementations.
v2: Fixed indentation in tcp_v6_send_check arguments.
v3: Move udp_set_csum and udp6_set_csum to be not inlined
Also have this functions call with a nocheck boolean argument
instead of passing a sock structure.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Tom Herbert [Thu, 5 Jun 2014 00:20:16 +0000 (17:20 -0700)]
net: Add GSO support for UDP tunnels with checksum
Added a new netif feature for GSO_UDP_TUNNEL_CSUM. This indicates
that a device is capable of computing the UDP checksum in the
encapsulating header of a UDP tunnel.
Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Tom Herbert [Thu, 5 Jun 2014 00:20:02 +0000 (17:20 -0700)]
net: Support for multiple checksums with gso
When creating a GSO packet segment we may need to set more than
one checksum in the packet (for instance a TCP checksum and
UDP checksum for VXLAN encapsulation). To be efficient, we want
to do checksum calculation for any part of the packet at most once.
This patch adds csum_start offset to skb_gso_cb. This tracks the
starting offset for skb->csum which is initially set in skb_segment.
When a protocol needs to compute a transport checksum it calls
gso_make_checksum which computes the checksum value from the start
of transport header to csum_start and then adds in skb->csum to get
the full checksum. skb->csum and csum_start are then updated to reflect
the checksum of the resultant packet starting from the transport header.
This patch also adds a flag to skbuff, encap_hdr_csum, which is set
in *gso_segment fucntions to indicate that a tunnel protocol needs
checksum calculation
Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Tom Herbert [Thu, 5 Jun 2014 00:19:48 +0000 (17:19 -0700)]
udp: Generic functions to set checksum
Added udp_set_csum and udp6_set_csum functions to set UDP checksums
in packets. These are for simple UDP packets such as those that might
be created in UDP tunnels.
Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 4 Jun 2014 22:14:17 +0000 (15:14 -0700)]
Merge branch 'bonding-macvlan'
Vlad Yasevich says:
====================
Fix support for macvlan devices on top bonding
Currently, macvlan devices do not work well over bond interfaces.
Everything works well, untill a failover is triggered in the bond
device and then macvlan becomes unreachble untill arp entries
are flushed. This series adds needed functionality to
handle correct notifications and update switches with mac addresses
assigned to macvlans.
The first patch simply addes IFF_UNICAST_FLT flag to bonds since they
already correctly manage the unicast filter list of the slaves, so
we might as well prevent the bond from needlessly going into promiscuous
mode.
The second patch adds notifier handler to macvlan to trigger correct
ARP notifications.
The third patch adds handling for TLB and RLB modes that use special
ETH_P_LOOPBACK type packets to teach switch about mac addresses.
It also allow ARPs for the macvlan mac addresses to be handled by
RLB mode.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Vlad Yasevich [Wed, 4 Jun 2014 20:23:38 +0000 (16:23 -0400)]
bonding: Support macvlans on top of tlb/rlb mode bonds
To make TLB mode work, the patch allows learning packets
to be sent using mac addresses assigned to macvlan devices,
also taking into an account vlans that may be between the
bond and macvlan device.
To make RLB work, all we have to do is accept ARP packets
for addresses added to the bond dev->uc list. Since RLB
mode will take care to update the peers directly with
correct mac addresses, learning packets for these addresses
do not have be send to switch.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Vlad Yasevich [Wed, 4 Jun 2014 20:23:37 +0000 (16:23 -0400)]
macvlan: Support bonding events
Bonding and team drivers generate specific events during failover
that trigger switch updates. When a macvlan device is configured
on top of bonding, we want switches to learn about the macvlan
devices as well. This patch adds a handler to macvlan driver to
propagate these events to all macvlan devices. We let the generic
inetdev event handler do the work.
This allows macvlan to operated correctly over active-backup
mode bond.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Vlad Yasevich [Wed, 4 Jun 2014 20:23:36 +0000 (16:23 -0400)]
bonding: Turn on IFF_UNICAST_FLT on bond devices
Bonding devices manage the unicast filters of the underlying
interfaces, but do not turn on IFF_UNICAST_FLT flag. Thus
anytime a unicast address is added to the bond, the bond is
places in promiscuous mode.
Turn on IFF_UNICAST_FLT on the bond device so that the bond does
not go into promiscuous mode needlesly. If an underlying device
does not support unicast filtering, that device will automaticall
enter promiscuous mode already.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
A small detail (assuming CONFIG_NET_NS=y) is that while for seq_files
you could do seq_file_net() to get the net ptr, doing so for a regular
file would be wrong and would dereference an invalid pointer.
The fib_triestat lie claimed a victim, and trying to show the file would
be bad for the kernel. This patch just reverts the issue and fixes
fib_triestat, which still needs a rewrite to either be a seq_file or
stop claiming it is.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Antonio Ospite <ao2@ao2.it> Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexander Gordeev <agordeev@redhat.com> Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
Xiubo Li [Wed, 4 Jun 2014 08:49:16 +0000 (16:49 +0800)]
gianfar: Fix the section mismatch warnings.
Building with CONFIG_DEBUG_SECTION_MISMATCH enabled, the following
WARNING is occured:
LD drivers/net/built-in.o
WARNING: drivers/net/built-in.o(.text+0xcd4c): Section mismatch in
reference from the function gfar_probe() to the function
.init.text:gfar_init_addr_hash_table()
The function gfar_probe() references
the function __init gfar_init_addr_hash_table().
This is often because gfar_probe lacks a __init
annotation or the annotation of gfar_init_addr_hash_table is wrong.
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 4 Jun 2014 21:48:30 +0000 (14:48 -0700)]
Merge branch 'xen-netback-netfront-multiqueue'
Wei Liu says:
====================
This is rebased version of Andrew's V8 patch series. The original cover letter:
--------------------
xen-net{back, front}: Multiple transmit and receive queues
This patch series implements multiple transmit and receive queues (i.e.
multiple shared rings) for the xen virtual network interfaces.
The series is split up as follows:
- Patch 1 brings the 'grant_copy_op' array back into struct xenvif, in
preparation for multi-queue support. See the patch itself for more details.
- Patches 2 and 4 factor out the queue-specific data for netback and
netfront respectively, and modify the rest of the code to use these
as appropriate.
- Patches 3 and 5 introduce new XenStore keys to negotiate and use
multiple shared rings and event channels, and code to connect these
as appropriate.
- Patch 6 documents the XenStore keys required for the new feature
in include/xen/interface/io/netif.h
All other transmit and receive processing remains unchanged, i.e. there
is a kthread per queue and a NAPI context per queue.
The performance of these patches has been analysed in detail, with
results available at:
To summarise:
* Using multiple queues allows a VM to transmit at line rate on a 10
Gbit/s NIC, compared with a maximum aggregate throughput of 6 Gbit/s
with a single queue.
* For intra-host VM--VM traffic, eight queues provide 171% of the
throughput of a single queue; almost 12 Gbit/s instead of 6 Gbit/s.
* There is a corresponding increase in total CPU usage, i.e. this is a
scaling out over available resources, not an efficiency improvement.
* Results depend on the availability of sufficient CPUs, as well as the
distribution of interrupts and the distribution of TCP streams across
the queues.
Queue selection is currently achieved via an L4 hash on the packet (i.e.
TCP src/dst port, IP src/dst address) and is not negotiated between the
frontend and backend, since only one option exists. Future patches to
support other frontends (particularly Windows) will need to add some
capability to negotiate not only the hash algorithm selection, but also
allow the frontend to specify some parameters to this.
Note that queue selection is a decision by the transmitting system about
which queue to use for a particular packet. In general, the algorithm
may differ between the frontend and the backend with no adverse effects.
Queue-specific XenStore entries for ring references and event channels
are stored hierarchically, i.e. under .../queue-N/... where N varies
from 0 to one less than the requested number of queues (inclusive). If
only one queue is requested, it falls back to the flat structure where
the ring references and event channels are written at the same level as
other vif information.
V8:
- Squash the queue error handling code into patch 3.
- Update the documentation (patch 6) according to comments on the
equivalent patch to Xen.
V7:
- Rebase on latest net-next, which includes the netback grant mapping
patch series from Zoltan Kiss
- Reduce QUEUE_NAME_SIZE by 1 to avoid double-counting the trailing '\0'
- Simplify the queue hashing by using (hash % num_queues) instead of
multiply & shift.
- Add ratelimited warning for invalid queue selection.
- Fix error handling to correctly tear down already setup queues.
- Use dev->real_num_tx_queues instead of separately maintaining a
count of the number of queues.
V6:
- Use 'max_queues' as the module param. name for both netback and netfront.
V5:
- Fix bug in xenvif_free() that could lead to an attempt to transmit an
skb after the queue structures had been freed.
- Improve the XenStore protocol documentation in netif.h.
- Fix IRQ_NAME_SIZE double-accounting for null terminator.
- Move rx_gso_checksum_fixup stat into struct xenvif_stats (per-queue).
- Don't initialise a local variable that is set in both branches (xspath).
V4:
- Add MODULE_PARM_DESC() for the multi-queue parameters for netback
and netfront modules.
- Move del_timer_sync() in netfront to after unregister_netdev, which
restores the order in which these functions were called before applying
these patches.
V3:
- Further indentation and style fixups.
V2:
- Rebase onto net-next.
- Change queue->number to queue->id.
- Add atomic operations around the small number of stats variables that
are not queue-specific or per-cpu.
- Fixup formatting and style issues.
- XenStore protocol changes documented in netif.h.
- Default max. number of queues to num_online_cpus().
- Check requested number of queues does not exceed maximum.
--------------------
I rebased this on top of net-next. No functional change is introduced. The
patch that needed some extra care was "xen-netback: Factor queue-specific data
into queue struct" because it clashed with a fix introduced in net. A simple
test of creating guest, iperf, then shutting down guest worked as expected.
The last patch fixes a minor problem that queue name is not initialised in
xen-netfront, resulting in names like "-tx" "-rx" in /proc/interrupt.
Changes since v9 (no functional change introduced):
* include commit summary in the commit message of first patch
* fold David Vrabel's Reviewed-by into last patch
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
xen-net{back, front}: Document multi-queue feature in netif.h
Document the multi-queue feature in terms of XenStore keys to be written
by the backend and by the frontend.
Signed-off-by: Andrew J. Bennieston <andrew.bennieston@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Build on the refactoring of the previous patch to implement multiple
queues between xen-netfront and xen-netback.
Check XenStore for multi-queue support, and set up the rings and event
channels accordingly.
Write ring references and event channels to XenStore in a queue
hierarchy if appropriate, or flat when using only one queue.
Update the xennet_select_queue() function to choose the queue on which
to transmit a packet based on the skb hash result.
Signed-off-by: Andrew J. Bennieston <andrew.bennieston@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
xen-netfront: Factor queue-specific data into queue struct.
In preparation for multi-queue support in xen-netfront, move the
queue-specific data from struct netfront_info to struct netfront_queue,
and update the rest of the code to use this.
Also adds loops over queues where appropriate, even though only one is
configured at this point, and uses alloc_etherdev_mq() and the
corresponding multi-queue netif wake/start/stop functions in preparation
for multiple active queues.
Finally, implements a trivial queue selection function suitable for
ndo_select_queue, which simply returns 0, selecting the first (and
only) queue.
Signed-off-by: Andrew J. Bennieston <andrew.bennieston@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Builds on the refactoring of the previous patch to implement multiple
queues between xen-netfront and xen-netback.
Writes the maximum supported number of queues into XenStore, and reads
the values written by the frontend to determine how many queues to use.
Ring references and event channels are read from XenStore on a per-queue
basis and rings are connected accordingly.
Also adds code to handle the cleanup of any already initialised queues
if the initialisation of a subsequent queue fails.
Signed-off-by: Andrew J. Bennieston <andrew.bennieston@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Wei Liu [Wed, 4 Jun 2014 09:30:42 +0000 (10:30 +0100)]
xen-netback: Factor queue-specific data into queue struct
In preparation for multi-queue support in xen-netback, move the
queue-specific data from struct xenvif into struct xenvif_queue, and
update the rest of the code to use this.
Also adds loops over queues where appropriate, even though only one is
configured at this point, and uses alloc_netdev_mq() and the
corresponding multi-queue netif wake/start/stop functions in preparation
for multiple active queues.
Finally, implements a trivial queue selection function suitable for
ndo_select_queue, which simply returns 0 for a single queue and uses
skb_get_hash() to compute the queue index otherwise.
Signed-off-by: Andrew J. Bennieston <andrew.bennieston@citrix.com> Signed-off-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
xen-netback: Move grant_copy_op array back into struct xenvif.
This array was allocated separately in commit ac3d5ac2 ("xen-netback:
fix guest-receive-side array sizes") due to it being very large, and a
struct xenvif is allocated as the netdev_priv part of a struct
net_device, i.e. via kmalloc() but falling back to vmalloc() if the
initial alloc. fails.
In preparation for the multi-queue patches, where this array becomes
part of struct xenvif_queue and is always allocated through vzalloc(),
move this back into the struct xenvif.
Signed-off-by: Andrew J. Bennieston <andrew.bennieston@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 4 Jun 2014 21:40:17 +0000 (14:40 -0700)]
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next
Jeff Kirsher says:
====================
Intel Wired LAN Driver Updates
This series contains updates to e1000, igb and ixgbe.
Emil provides his version 2 fix for the detection of SFP+ capable interfaces.
In cases where the driver is loaded while there are no SFP+ modules in cage,
the interface was not being detected as SFP capable. Resolve the issue by
identifying interfaces with no PHY type set as SFP capable which allows the
driver to detect the SFP module when the interface is brought up. In this
version 2 of the patch, the 82599 specific check was removed since we only
have 82598 devices that are SFP capable.
Jacob removes the including of the export header in the ixgbe PTP core, since
it is not needed. Renames igb_ptp_enable() to igb_ptp_feature_enable() to
better reflect the actual functions purpose.
Todd fixes the ethtool loopback test for i354 backplane devices since we
do not know what PHY is to be used for the devices, use MAC loopback for
ethtool tests. Todd also sets the packet buffer size register defaults for
i210 devices.
Yongjian Xu removes the check for skb->len being negative or zero since there
is never a case where it would be zero or negative for e1000.
Manuel Schölling updates e1000 to use the time_after() helper function.
v2: Fix indentation on wrapped line in patch 3 of the series based on
feedback from David Miller
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Manuel Schölling [Fri, 23 May 2014 18:04:17 +0000 (18:04 +0000)]
e1000: Use time_after() for time comparison
To be future-proof and for better readability the time comparisons are modified
to use time_after() instead of plain, error-prone math.
Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Jacob Keller [Fri, 16 May 2014 07:21:13 +0000 (07:21 +0000)]
igb: rename igb_ptp_enable to igb_ptp_feature_enable
The name igb_ptp_enable is not synonymous with the purpose of this
function, so rename it to better explain its purpose.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Jacob Keller [Fri, 23 May 2014 08:18:13 +0000 (08:18 +0000)]
ixgbe: remove linux/export.h header from ixgbe_ptp.c
We don't need this header file, so we shouldn't be including it.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Emil Tantilov [Thu, 15 May 2014 07:16:53 +0000 (07:16 +0000)]
ixgbe: fix detection of SFP+ capable interfaces
In cases where the driver is loaded while there are no SFP+ modules in
the cage the interface was not being detected as SFP capable. To account
for this the driver called identify_sfp in ixgbe_get_settings to make
sure the data is correct. However when there is no SFP+ module in the cage
the driver waits for the I2C reads to time out which can take more than a
second and will cause issues with tools (like net-snmp) that may poll
for that information.
This patch resolves the issue by identifying interfaces with no PHY
type set as SFP capable which allows the driver to detect the SFP module
when the interface is brought up. As result of this we can also remove the
identify_sfp call from ixgbe_get_settings.
v2: remove the 82599 specific check since we have 82598 devices that are SFP
capable.
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com> Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Sergei Shtylyov [Tue, 3 Jun 2014 19:42:26 +0000 (23:42 +0400)]
sh_eth: fix SH7619/771x support
Commit 4a55530f38e4 (net: sh_eth: modify the definitions of register) managed
to leave out the E-DMAC register entries in sh_eth_offset_fast_sh3_sh2[], thus
totally breaking SH7619/771x support. Add the missing entries using the data
from before that commit.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ben Dooks [Tue, 3 Jun 2014 11:21:13 +0000 (12:21 +0100)]
sh_eth: use RNC mode for packet reception
The current behaviour of the sh_eth driver is not to use the RNC bit
for the receive ring. This means that every packet recieved is not only
generating an IRQ but it also stops the receive ring DMA as well until
the driver re-enables it after unloading the packet.
This means that a number of the following errors are generated due to
the receive packet FIFO overflowing due to nowhere to put packets:
net eth0: Receive FIFO Overflow
Since feedback from Yoshihiro Shimoda shows that every supported LSI
for this driver should have the bit enabled it seems the best way is
to remove the RMCR default value from the per-system data and just
write it when initialising the RMCR value. This is discussed in
the message (http://www.spinics.net/lists/netdev/msg284912.html).
I have tested the RMCR_RNC configuration with NFS root filesystem and
the driver has not failed yet. There are further test reports from
Sergei Shtylov and others for both the R8A7790 and R8A7791.
There is also feedback fron Cao Minh Hiep[1] which reports the
same issue in (http://comments.gmane.org/gmane.linux.network/316285)
showing this fixes issues with losing UDP datagrams under iperf.
Tested-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Tue, 3 Jun 2014 23:40:47 +0000 (16:40 -0700)]
rtnetlink: fix a memory leak when ->newlink fails
It is possible that ->newlink() fails before registering
the device, in this case we should just free it, it's
safe to call free_netdev().
Fixes: commit 0e0eee2465df77bcec2 (net: correct error path in rtnl_newlink()) Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
bnx2x: Fix kernel crash and data miscompare after EEH recovery
A rmb() is required to ensure that the CQE is not read before it
is written by the adapter DMA. PCI ordering rules will make sure
the other fields are written before the marker at the end of struct
eth_fast_path_rx_cqe but without rmb() a weakly ordered processor can
process stale data.
Without the barrier we have observed various crashes including
bnx2x_tpa_start being called on queues not stopped (resulting in message
start of bin not in stop) and NULL pointer exceptions from bnx2x_rx_int.
Signed-off-by: Milton Miller <miltonm@us.ibm.com> Signed-off-by: Wen Xiong <wenxiong@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
net: driver: smsc: set NOCARRIER flag in dev at driver initialization
As smsc driver supports carrier detection, it should unset NOCARRIER
flag only after carrier state determination. By default that flag
is off so driver should set it before starting auto-negotiation
Signed-off-by: Balakumaran <Balakumaran.Kannan@ap.sony.com> Signed-off-by: David S. Miller <davem@davemloft.net>
The uuid structure could be managed as a const in several places.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Michal Kubecek [Tue, 3 Jun 2014 08:26:06 +0000 (10:26 +0200)]
xfrm: fix race between netns cleanup and state expire notification
The xfrm_user module registers its pernet init/exit after xfrm
itself so that its net exit function xfrm_user_net_exit() is
executed before xfrm_net_exit() which calls xfrm_state_fini() to
cleanup the SA's (xfrm states). This opens a window between
zeroing net->xfrm.nlsk pointer and deleting all xfrm_state
instances which may access it (via the timer). If an xfrm state
expires in this window, xfrm_exp_state_notify() will pass null
pointer as socket to nlmsg_multicast().
As the notifications are called inside rcu_read_lock() block, it
is sufficient to retrieve the nlsk socket with rcu_dereference()
and check the it for null.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
Zhangfei Gao [Tue, 3 Jun 2014 05:49:37 +0000 (13:49 +0800)]
net: hisilicon: add hix5hd2 mac driver
Add support for the hix5hd2 XGMAC 1Gb ethernet device.
The controller requires two queues for tx and two queues for rx.
Controller fetch buffer from free queue and then push to used queue.
Diver should prepare free queue and free buffer from used queue.
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Michael Chan [Tue, 3 Jun 2014 06:08:48 +0000 (23:08 -0700)]
cnic: Fix missing ISCSI_KEVENT_IF_DOWN message
The iSCSI netlink message needs to be sent before the ulp_ops is cleared
as it is sent through a function pointer in the ulp_ops. This bug
causes iscsid to not get the message when the bnx2i driver is unloaded.
Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Michael Chan [Tue, 3 Jun 2014 06:08:47 +0000 (23:08 -0700)]
cnic: Don't take cnic_dev_lock in cnic_alloc_uio_rings()
We are allocating memory with GFP_KERNEL under spinlock. Since this is
the only call manipulating the cnic_udev_list and it is always under
rtnl_lock, cnic_dev_lock can be safely removed.
Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Michael Chan [Tue, 3 Jun 2014 06:08:46 +0000 (23:08 -0700)]
cnic: Don't take rcu_read_lock in cnic_rcv_netevent()
Because the called function, such as bnx2fc_indicate_netevent(), can sleep,
we cannot take rcu_lock(). To prevent the rcu protected ulp_ops from going
away, we use the cnic_lock mutex and set the ULP_F_CALL_PENDING flag.
The code already waits for ULP_F_CALL_PENDING flag to clear in
cnic_unregister_device().
Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
In commit cd11cf505318ff24e42f35145f9cdf8596fa1958 I accidentally
added an error message. I used it for debugging and forgot to remove
it before submitting the patch.
Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 3 Jun 2014 06:07:02 +0000 (23:07 -0700)]
Merge branch 'ethtool-rssh-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bwh/net-next
Ben Hutchings says:
====================
Pull request: Fixes for new ethtool RSS commands
This addresses several problems I previously identified with the new
ETHTOOL_{G,S}RSSH commands:
1. Missing validation of reserved parameters
2. Vague documentation
3. Use of unnamed magic number
4. No consolidation with existing driver operations
I don't currently have access to suitable network hardware, but have
tested these changes with a dummy driver that can support various
combinations of operations and sizes, together with (a) Debian's ethtool
3.13 (b) ethtool 3.14 with the submitted patch to use ETHTOOL_{G,S}RSSH
and minor adjustment for fixes 1 and 3.
v2: Update RSS operations in vmxnet3 too
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Ben Hutchings [Thu, 15 May 2014 00:25:27 +0000 (01:25 +0100)]
ethtool: Replace ethtool_ops::{get,set}_rxfh_indir() with {get,set}_rxfh()
ETHTOOL_{G,S}RXFHINDIR and ETHTOOL_{G,S}RSSH should work for drivers
regardless of whether they expose the hash key, unless you try to
set a hash key for a driver that doesn't expose it.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
1) Unbreak zebra and other netlink apps, from Eric W Biederman.
2) Some new qmi_wwan device IDs, from Aleksander Morgado.
3) Fix info leak in DCB netlink handler of qlcnic driver, from Dan
Carpenter.
4) inet_getid() and ipv6_select_ident() do not generate monotonically
increasing ID numbers, fix from Eric Dumazet.
5) Fix memory leak in __sk_prepare_filter(), from Leon Yu.
6) Netlink leftover bytes warning message is user triggerable, rate
limit it. From Michal Schmidt.
7) Fix non-linear SKB panic in ipvs, from Peter Christensen.
8) Congestion window undo needs to be performed even if only never
retransmitted data is SACK'd, fix from Yuching Cheng.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (24 commits)
net: filter: fix possible memory leak in __sk_prepare_filter()
net: ec_bhf: Add runtime dependencies
tcp: fix cwnd undo on DSACK in F-RTO
netlink: Only check file credentials for implicit destinations
ipheth: Add support for iPad 2 and iPad 3
team: fix mtu setting
net: fix inet_getid() and ipv6_select_ident() bugs
net: qmi_wwan: interface #11 in Sierra Wireless MC73xx is not QMI
net: qmi_wwan: add additional Sierra Wireless QMI devices
bridge: Prevent insertion of FDB entry with disallowed vlan
netlink: rate-limit leftover bytes warning and print process name
bridge: notify user space after fdb update
net: qmi_wwan: add Netgear AirCard 341U
net: fix wrong mac_len calculation for vlans
batman-adv: fix NULL pointer dereferences
net/mlx4_core: Reset RoCE VF gids when guest driver goes down
emac: aggregation of v1-2 PLB errors for IER register
emac: add missing support of 10mbit in emac/rgmii
can: only rename enabled led triggers when changing the netdev name
ipvs: Fix panic due to non-linear skb
...
Fabio Estevam [Mon, 2 Jun 2014 18:44:30 +0000 (15:44 -0300)]
fec: Include pinctrl header file
Commit 5bbde4d2ec ("net: fec: use pinctrl PM helpers") caused the following
build error on m68k:
drivers/net/ethernet/freescale/fec_main.c: In function 'fec_enet_open':
drivers/net/ethernet/freescale/fec_main.c:1819:2: error: implicit declaration of function 'pinctrl_pm_select_default_state' [-Werror=implicit-function-declaration]
drivers/net/ethernet/freescale/fec_main.c: In function 'fec_enet_close':
drivers/net/ethernet/freescale/fec_main.c:1863:2: error: implicit declaration of function 'pinctrl_pm_select_sleep_state' [-Werror=implicit-function-declaration]
In order to fix the build error, include the linux/pinctrl/consumer.h header
file.
Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Roopa Prabhu [Wed, 28 May 2014 05:39:37 +0000 (22:39 -0700)]
bridge: Add bridge ifindex to bridge fdb notify msgs
(This patch was previously posted as RFC at
http://patchwork.ozlabs.org/patch/352677/)
This patch adds NDA_MASTER attribute to neighbour attributes enum for
bridge/master ifindex. And adds NDA_MASTER to bridge fdb notify msgs.
Today bridge fdb notifications dont contain bridge information.
Userspace can derive it from the port information in the fdb
notification. However this is tricky in some scenarious.
Example, bridge port delete notification comes before bridge fdb
delete notifications. And we have seen problems in userspace
when using libnl where, the bridge fdb delete notification handling code
does not understand which bridge this fdb entry is part of because
the bridge and port association has already been deleted.
And these notifications (port membership and fdb) are generated on
separate rtnl groups.
Fixing the order of notifications could possibly solve the problem
for some cases (I can submit a separate patch for that).
This patch chooses to add NDA_MASTER to bridge fdb notify msgs
because it not only solves the problem described above, but also helps
userspace avoid another lookup into link msgs to derive the master index.
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Leon Yu [Sun, 1 Jun 2014 05:37:25 +0000 (05:37 +0000)]
net: filter: fix possible memory leak in __sk_prepare_filter()
__sk_prepare_filter() was reworked in commit bd4cf0ed3 (net: filter:
rework/optimize internal BPF interpreter's instruction set) so that it should
have uncharged memory once things went wrong. However that work isn't complete.
Error is handled only in __sk_migrate_filter() while memory can still leak in
the error path right after sk_chk_filter().
Fixes: bd4cf0ed331a ("net: filter: rework/optimize internal BPF interpreter's instruction set") Signed-off-by: Leon Yu <chianglungyu@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Tested-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Tue, 3 Jun 2014 00:04:37 +0000 (17:04 -0700)]
Merge tag 'md/3.15-fixes' of git://neil.brown.name/md
Pull two md bugfixes from Neil Brown:
"Two md bugfixes for possible corruption when restarting reshape
If a raid5/6 reshape is restarted (After stopping and re-assembling
the array) and the array is marked read-only (or read-auto), then the
reshape will appear to complete immediately, without actually moving
anything around. This can result in corruption.
There are two patches which do much the same thing in different
places. They are separate because one is an older bug and so can be
applied to more -stable kernels"
* tag 'md/3.15-fixes' of git://neil.brown.name/md:
md: always set MD_RECOVERY_INTR when interrupting a reshape thread.
md: always set MD_RECOVERY_INTR when aborting a reshape or other "resync".
This patch remove variables that are initialized with a constant,
are never updated, and are only used as parameter of return.
Return the constant instead of using a variable.
Verified by compilation only.
The coccinelle script that find and fixes this issue is:
// <smpl>
@@
type T;
constant C;
identifier ret;
@@
- T ret = C;
... when != ret
when strict
return
- ret
+ C
;
// </smpl>
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jean Delvare [Sat, 31 May 2014 15:32:27 +0000 (17:32 +0200)]
net: ec_bhf: Add runtime dependencies
The ec_bhf driver is specific to the Beckhoff CX embedded PC series.
These are based on Intel x86 CPU. So we can add a dependency on
X86, with COMPILE_TEST as an alternative to still allow for broader
build-testing.
Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Darek Marcinkiewicz <reksio@newterm.pl> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Queued trim only works for some users with MU05 firmware. Revert to
blacklisting all firmware versions.
Introduced by commit d121f7d0cbb8 ("libata: Update queued trim blacklist
for M5x0 drives") which this effectively reverts, while retaining the
blacklisting of M550.
See
https://bugzilla.kernel.org/show_bug.cgi?id=71371
for reports of trouble with MU05 firmware.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch remove variables that are initialized with a constant,
are never updated, and are only used as parameter of return.
Return the constant instead of using a variable.
Verified by compilation only.
The coccinelle script that find and fixes this issue is:
// <smpl>
@@
type T;
constant C;
identifier ret;
@@
- T ret = C;
... when != ret
when strict
return
- ret
+ C
;
// </smpl>
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>