openwrt/staging/blogic.git
8 years agonetfilter: ingress: translate 0 nf_hook_slow retval to -1
Florian Westphal [Mon, 28 Nov 2016 10:40:05 +0000 (11:40 +0100)]
netfilter: ingress: translate 0 nf_hook_slow retval to -1

The caller assumes that < 0 means that skb was stolen (or free'd).

All other return values continue skb processing.

nf_hook_slow returns 3 different return value types:

A) a (negative) errno value: the skb was dropped (NF_DROP, e.g.
by iptables '-j DROP' rule).

B) 0. The skb was stolen by the hook or queued to userspace.

C) 1. all hooks returned NF_ACCEPT so the caller should invoke
   the okfn so packet processing can continue.

nft ingress facility currently doesn't have the 'okfn' that
the NF_HOOK() macros use; there is no nfqueue support either.

So 1 means that nf_hook_ingress() caller should go on processing the skb.

In order to allow use of NF_STOLEN from ingress we need to translate
this to an errno number, else we'd crash because we continue with
already-free'd (or about to be free-d) skb.

The errno value isn't checked, its just important that its less than 0,
so return -1.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: xt_multiport: Fix wrong unmatch result with multiple ports
Gao Feng [Fri, 25 Nov 2016 04:32:07 +0000 (12:32 +0800)]
netfilter: xt_multiport: Fix wrong unmatch result with multiple ports

I lost one test case in the last commit for xt_multiport.
For example, the rule is "-m multiport --dports 22,80,443".
When first port is unmatched and the second is matched, the curent codes
could not return the right result.
It would return false directly when the first port is unmatched.

Fixes: dd2602d00f80 ("netfilter: xt_multiport: Use switch case instead
of multiple condition checks")
Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_payload: layer 4 checksum adjustment for pseudoheader fields
Pablo Neira Ayuso [Thu, 24 Nov 2016 11:04:55 +0000 (12:04 +0100)]
netfilter: nft_payload: layer 4 checksum adjustment for pseudoheader fields

This patch adds a new flag that signals the kernel to update layer 4
checksum if the packet field belongs to the layer 4 pseudoheader. This
implicitly provides stateless NAT 1:1 that is useful under very specific
usecases.

Since rules mangling layer 3 fields that are part of the pseudoheader
may potentially convey any layer 4 packet, we have to deal with the
layer 4 checksum adjustment using protocol specific code.

This patch adds support for TCP, UDP and ICMPv6, since they include the
pseudoheader in the layer 4 checksum calculation. ICMP doesn't, so we
can skip it.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_fib_ipv4: initialize *dest to zero
Liping Zhang [Wed, 23 Nov 2016 14:12:21 +0000 (22:12 +0800)]
netfilter: nft_fib_ipv4: initialize *dest to zero

Otherwise, if fib lookup fail, *dest will be filled with garbage value,
so reverse path filtering will not work properly:
 # nft add rule x prerouting fib saddr oif eq 0 drop

Fixes: f6d0cbcf09c5 ("netfilter: nf_tables: add fib expression")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nft_fib: convert htonl to ntohl properly
Liping Zhang [Wed, 23 Nov 2016 14:12:20 +0000 (22:12 +0800)]
netfilter: nft_fib: convert htonl to ntohl properly

Acctually ntohl and htonl are identical, so this doesn't affect
anything, but it is conceptually wrong.

Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: x_tables: pack percpu counter allocations
Florian Westphal [Tue, 22 Nov 2016 13:44:19 +0000 (14:44 +0100)]
netfilter: x_tables: pack percpu counter allocations

instead of allocating each xt_counter individually, allocate 4k chunks
and then use these for counter allocation requests.

This should speed up rule evaluation by increasing data locality,
also speeds up ruleset loading because we reduce calls to the percpu
allocator.

As Eric points out we can't use PAGE_SIZE, page_allocator would fail on
arches with 64k page size.

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: x_tables: pass xt_counters struct to counter allocator
Florian Westphal [Tue, 22 Nov 2016 13:44:18 +0000 (14:44 +0100)]
netfilter: x_tables: pass xt_counters struct to counter allocator

Keeps some noise away from a followup patch.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: x_tables: pass xt_counters struct instead of packet counter
Florian Westphal [Tue, 22 Nov 2016 13:44:17 +0000 (14:44 +0100)]
netfilter: x_tables: pass xt_counters struct instead of packet counter

On SMP we overload the packet counter (unsigned long) to contain
percpu offset.  Hide this from callers and pass xt_counters address
instead.

Preparation patch to allocate the percpu counters in page-sized batch
chunks.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: convert while loops to for loops
Aaron Conole [Tue, 15 Nov 2016 22:48:46 +0000 (17:48 -0500)]
netfilter: convert while loops to for loops

This is to facilitate converting from a singly-linked list to an array
of elements.

Signed-off-by: Aaron Conole <aconole@bytheb.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: decouple nf_hook_entry and nf_hook_ops
Aaron Conole [Tue, 15 Nov 2016 22:48:45 +0000 (17:48 -0500)]
netfilter: decouple nf_hook_entry and nf_hook_ops

During nfhook traversal we only need a very small subset of
nf_hook_ops members.

We need:
- next element
- hook function to call
- hook function priv argument

Bridge netfilter also needs 'thresh'; can be obtained via ->orig_ops.

nf_hook_entry struct is now 32 bytes on x86_64.

A followup patch will turn the run-time list into an array that only
stores hook functions plus their priv arguments, eliminating the ->next
element.

Suggested-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Aaron Conole <aconole@bytheb.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: introduce accessor functions for hook entries
Aaron Conole [Tue, 15 Nov 2016 22:48:44 +0000 (17:48 -0500)]
netfilter: introduce accessor functions for hook entries

This allows easier future refactoring.

Signed-off-by: Aaron Conole <aconole@bytheb.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: defrag: only register defrag functionality if needed
Florian Westphal [Tue, 15 Nov 2016 20:36:45 +0000 (21:36 +0100)]
netfilter: defrag: only register defrag functionality if needed

nf_defrag modules for ipv4 and ipv6 export an empty stub function.
Any module that needs the defragmentation hooks registered simply 'calls'
this empty function to create a phony module dependency -- modprobe will
then load the defrag module too.

This extends netfilter ipv4/ipv6 defragmentation modules to delay the hook
registration until the functionality is requested within a network namespace
instead of module load time for all namespaces.

Hooks are only un-registered on module unload or when a namespace that used
such defrag functionality exits.

We have to use struct net for this as the register hooks can be called
before netns initialization here from the ipv4/ipv6 conntrack module
init path.

There is no unregister functionality support, defrag will always be
active once it was requested inside a net namespace.

The reason is that defrag has impact on nft and iptables rulesets
(without defrag we might see framents).

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: conntrack: add nf_conntrack_default_on sysctl
Florian Westphal [Tue, 15 Nov 2016 20:36:44 +0000 (21:36 +0100)]
netfilter: conntrack: add nf_conntrack_default_on sysctl

This switch (default on) can be used to disable automatic registration
of connection tracking functionality in newly created network
namespaces.

This means that when net namespace goes down (or the tracker protocol
module is unloaded) we *might* have to unregister the hooks.

We can either add another per-netns variable that tells if
the hooks got registered by default, or, alternatively, just call
the protocol _put() function and have the callee deal with a possible
'extra' put() operation that doesn't pair with a get() one.

This uses the latter approach, i.e. a put() without a get has no effect.

Conntrack is still enabled automatically regardless of the new sysctl
setting if the new net namespace requires connection tracking, e.g. when
NAT rules are created.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: conntrack: register hooks in netns when needed by ruleset
Florian Westphal [Tue, 15 Nov 2016 20:36:43 +0000 (21:36 +0100)]
netfilter: conntrack: register hooks in netns when needed by ruleset

This makes use of nf_ct_netns_get/put added in previous patch.
We add get/put functions to nf_conntrack_l3proto structure, ipv4 and ipv6
then implement use-count to track how many users (nft or xtables modules)
have a dependency on ipv4 and/or ipv6 connection tracking functionality.

When count reaches zero, the hooks are unregistered.

This delays activation of connection tracking inside a namespace until
stateful firewall rule or nat rule gets added.

This patch breaks backwards compatibility in the sense that connection
tracking won't be active anymore when the protocol tracker module is
loaded.  This breaks e.g. setups that ctnetlink for flow accounting and
the like, without any '-m conntrack' packet filter rules.

Followup patch restores old behavour and makes new delayed scheme
optional via sysctl.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_tables: add conntrack dependencies for nat/masq/redir expressions
Florian Westphal [Tue, 15 Nov 2016 20:36:42 +0000 (21:36 +0100)]
netfilter: nf_tables: add conntrack dependencies for nat/masq/redir expressions

so that conntrack core will add the needed hooks in this namespace.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nat: add dependencies on conntrack module
Florian Westphal [Tue, 15 Nov 2016 20:36:41 +0000 (21:36 +0100)]
netfilter: nat: add dependencies on conntrack module

MASQUERADE, S/DNAT and REDIRECT already call functions that depend on the
conntrack module.

However, since the conntrack hooks are now registered in a lazy fashion
(i.e., only when needed) a symbol reference is not enough.

Thus, when something is added to a nat table, make sure that it will see
packets by calling nf_ct_netns_get() which will register the conntrack
hooks in the current netns.

An alternative would be to add these dependencies to the NAT table.

However, that has problems when using non-modular builds -- we might
register e.g. ipv6 conntrack before its initcall has run, leading to NULL
deref crashes since its per-netns storage has not yet been allocated.

Adding the dependency in the modules instead has the advantage that nat
table also does not register its hooks until rules are added.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: add and use nf_ct_netns_get/put
Florian Westphal [Tue, 15 Nov 2016 20:36:40 +0000 (21:36 +0100)]
netfilter: add and use nf_ct_netns_get/put

currently aliased to try_module_get/_put.
Will be changed in next patch when we add functions to make use of ->net
argument to store usercount per l3proto tracker.

This is needed to avoid registering the conntrack hooks in all netns and
later only enable connection tracking in those that need conntrack.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: conntrack: remove unused init_net hook
Florian Westphal [Tue, 15 Nov 2016 20:36:39 +0000 (21:36 +0100)]
netfilter: conntrack: remove unused init_net hook

since adf0516845bcd0 ("netfilter: remove ip_conntrack* sysctl compat code")
the only user (ipv4 tracker) sets this to an empty stub function.

After this change nf_ct_l3proto_pernet_register() is also empty,
but this will change in a followup patch to add conditional register
of the hooks.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: conntrack: built-in support for UDPlite
Davide Caratti [Tue, 15 Nov 2016 14:08:27 +0000 (15:08 +0100)]
netfilter: conntrack: built-in support for UDPlite

CONFIG_NF_CT_PROTO_UDPLITE is no more a tristate. When set to y,
connection tracking support for UDPlite protocol is built-in into
nf_conntrack.ko.

footprint test:
$ ls -l net/netfilter/nf_conntrack{_proto_udplite,}.ko \
        net/ipv4/netfilter/nf_conntrack_ipv4.ko \
        net/ipv6/netfilter/nf_conntrack_ipv6.ko

(builtin)|| udplite|  ipv4  |  ipv6  |nf_conntrack
---------++--------+--------+--------+--------------
none     || 432538 | 828755 | 828676 | 6141434
UDPlite  ||   -    | 829649 | 829362 | 6498204

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: conntrack: built-in support for SCTP
Davide Caratti [Tue, 15 Nov 2016 14:08:26 +0000 (15:08 +0100)]
netfilter: conntrack: built-in support for SCTP

CONFIG_NF_CT_PROTO_SCTP is no more a tristate. When set to y, connection
tracking support for SCTP protocol is built-in into nf_conntrack.ko.

footprint test:
$ ls -l net/netfilter/nf_conntrack{_proto_sctp,}.ko \
        net/ipv4/netfilter/nf_conntrack_ipv4.ko \
        net/ipv6/netfilter/nf_conntrack_ipv6.ko

(builtin)||  sctp  |  ipv4  |  ipv6  | nf_conntrack
---------++--------+--------+--------+--------------
none     || 498243 | 828755 | 828676 | 6141434
SCTP     ||   -    | 829254 | 829175 | 6547872

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: conntrack: built-in support for DCCP
Davide Caratti [Tue, 15 Nov 2016 14:08:25 +0000 (15:08 +0100)]
netfilter: conntrack: built-in support for DCCP

CONFIG_NF_CT_PROTO_DCCP is no more a tristate. When set to y, connection
tracking support for DCCP protocol is built-in into nf_conntrack.ko.

footprint test:
$ ls -l net/netfilter/nf_conntrack{_proto_dccp,}.ko \
        net/ipv4/netfilter/nf_conntrack_ipv4.ko \
        net/ipv6/netfilter/nf_conntrack_ipv6.ko

(builtin)||  dccp  |  ipv4  |  ipv6  | nf_conntrack
---------++--------+--------+--------+--------------
none     || 469140 | 828755 | 828676 | 6141434
DCCP     ||   -    | 830566 | 829935 | 6533526

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_conntrack_tuple_common.h: fix #include
Davide Caratti [Tue, 15 Nov 2016 14:08:24 +0000 (15:08 +0100)]
netfilter: nf_conntrack_tuple_common.h: fix #include

To allow usage of enum ip_conntrack_dir in include/net/netns/conntrack.h,
this patch encloses #include <linux/netfilter.h> in a #ifndef __KERNEL__
directive, so that compiler errors caused by unwanted inclusion of
include/linux/netfilter.h are avoided.
In addition, #include <linux/netfilter/nf_conntrack_common.h> line has
been added to resolve correctly CTINFO2DIR macro.

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agoMerge tag 'ipvs-for-v4.10' of https://git.kernel.org/pub/scm/linux/kernel/git/horms...
Pablo Neira Ayuso [Sun, 4 Dec 2016 19:46:16 +0000 (20:46 +0100)]
Merge tag 'ipvs-for-v4.10' of https://git./linux/kernel/git/horms/ipvs-next

Simon Horman says:

====================
IPVS Updates for v4.10

please consider these enhancements to the IPVS for v4.10.

* Decrement the IP ttl in all the modes in order to prevent infinite
  route loops. Thanks to Dwip Banerjee.
* Use IS_ERR_OR_NULL macro. Clean-up from Gao Feng.
====================

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nfnetlink_log: add "nf-logger-5-1" module alias name
Liping Zhang [Mon, 14 Nov 2016 14:41:08 +0000 (22:41 +0800)]
netfilter: nfnetlink_log: add "nf-logger-5-1" module alias name

So we can autoload nfnetlink_log.ko when the user adding nft log
group X rule in netdev family.

Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: nf_log: do not assume ethernet header in netdev family
Liping Zhang [Mon, 14 Nov 2016 14:39:25 +0000 (22:39 +0800)]
netfilter: nf_log: do not assume ethernet header in netdev family

In netdev family, we will handle non ethernet packets, so using
eth_hdr(skb)->h_proto is incorrect.

Meanwhile, we can use socket(AF_PACKET...) to sending packets, so
skb->protocol is not always set in bridge family.

Add an extra parameter into nf_log_l2packet to solve this issue.

Fixes: 1fddf4bad0ac ("netfilter: nf_log: add packet logging for netdev family")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: built-in NAT support for UDPlite
Davide Caratti [Thu, 20 Oct 2016 16:33:03 +0000 (18:33 +0200)]
netfilter: built-in NAT support for UDPlite

CONFIG_NF_NAT_PROTO_UDPLITE is no more a tristate. When set to y, NAT
support for UDPlite protocol is built-in into nf_nat.ko.

footprint test:

(nf_nat_proto_)           |udplite || nf_nat
--------------------------+--------++--------
no builtin                | 408048 || 2241312
UDPLITE builtin           |   -    || 2577256

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: built-in NAT support for SCTP
Davide Caratti [Thu, 20 Oct 2016 16:33:02 +0000 (18:33 +0200)]
netfilter: built-in NAT support for SCTP

CONFIG_NF_NAT_PROTO_SCTP is no more a tristate. When set to y, NAT
support for SCTP protocol is built-in into nf_nat.ko.

footprint test:

(nf_nat_proto_)           | sctp   || nf_nat
--------------------------+--------++--------
no builtin                | 428344 || 2241312
SCTP builtin              |   -    || 2597032

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: built-in NAT support for DCCP
Davide Caratti [Thu, 20 Oct 2016 16:33:01 +0000 (18:33 +0200)]
netfilter: built-in NAT support for DCCP

CONFIG_NF_NAT_PROTO_DCCP is no more a tristate. When set to y, NAT
support for DCCP protocol is built-in into nf_nat.ko.

footprint test:

(nf_nat_proto_)           | dccp   || nf_nat
--------------------------+--------++--------
no builtin                | 409800 || 2241312
DCCP builtin              |   -    || 2578968

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agonetfilter: update Arturo Borrero Gonzalez email address
Arturo Borrero Gonzalez [Tue, 18 Oct 2016 12:02:29 +0000 (14:02 +0200)]
netfilter: update Arturo Borrero Gonzalez email address

The email address has changed, let's update the copyright statements.

Signed-off-by: Arturo Borrero Gonzalez <arturo@debian.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
8 years agoipv6 addrconf: Implemented enhanced DAD (RFC7527)
Erik Nordmark [Fri, 2 Dec 2016 22:00:08 +0000 (14:00 -0800)]
ipv6 addrconf: Implemented enhanced DAD (RFC7527)

Implemented RFC7527 Enhanced DAD.
IPv6 duplicate address detection can fail if there is some temporary
loopback of Ethernet frames. RFC7527 solves this by including a random
nonce in the NS messages used for DAD, and if an NS is received with the
same nonce it is assumed to be a looped back DAD probe and is ignored.
RFC7527 is enabled by default. Can be disabled by setting both of
conf/{all,interface}/enhanced_dad to zero.

Signed-off-by: Erik Nordmark <nordmark@arista.com>
Signed-off-by: Bob Gilligan <gilligan@arista.com>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'mv88e6390-batch-three'
David S. Miller [Sun, 4 Dec 2016 04:18:39 +0000 (23:18 -0500)]
Merge branch 'mv88e6390-batch-three'

Andrew Lunn says:

====================
mv88e6390 batch 3

More patches to support the MV88e6390. This is mostly refactoring
existing code and adding implementations for the mv88e6390.  This
patchset set which reserved frames are sent to the cpu, the size of
jumbo frames that will be accepted, turn off egress rate limiting, and
configuration of pause frames.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Implement mv88e6390 pause control
Andrew Lunn [Sat, 3 Dec 2016 03:45:20 +0000 (04:45 +0100)]
net: dsa: mv88e6xxx: Implement mv88e6390 pause control

The mv88e6390 has a number flow control registers accessed via the
Flow Control register. Use these to set the pause control.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Refactor pause configuration
Andrew Lunn [Sat, 3 Dec 2016 03:45:19 +0000 (04:45 +0100)]
net: dsa: mv88e6xxx: Refactor pause configuration

The mv88e6390 has a different mechanism for configuring pause.
Refactor the code into an ops function, and for the moment, don't add
any mv88e6390 code yet.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Refactor egress rate limiting
Andrew Lunn [Sat, 3 Dec 2016 03:45:18 +0000 (04:45 +0100)]
net: dsa: mv88e6xxx: Refactor egress rate limiting

There are two different rate limiting configurations, depending on the
switch generation. Refactor this into ops.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Refactor setting of jumbo frames
Andrew Lunn [Sat, 3 Dec 2016 03:45:17 +0000 (04:45 +0100)]
net: dsa: mv88e6xxx: Refactor setting of jumbo frames

Some switches support jumbo frames. Refactor this code into operations
in the ops structure.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Reserved Management frames to CPU
Andrew Lunn [Sat, 3 Dec 2016 03:45:16 +0000 (04:45 +0100)]
net: dsa: mv88e6xxx: Reserved Management frames to CPU

Older devices have a couple of registers in global2. The mv88e6390
family has a single register in global1 behind which hides similar
configuration. Implement and op for this.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'mv88e6390-batch-two'
David S. Miller [Sun, 4 Dec 2016 04:15:01 +0000 (23:15 -0500)]
Merge branch 'mv88e6390-batch-two'

Andrew Lunn says:

====================
MV88E6390 batch two

This is the second batch of patches adding support for the
MV88e6390. They are not sufficient to make it work properly.

The mv88e6390 has a much expanded set of priority maps. Refactor the
existing code, and implement basic support for the new device.

Similarly, the monitor control register has been reworked.

The mv88e6390 has something odd in its EDSA tagging implementation,
which means it is not possible to use it. So we need to use DSA
tagging. This is the first device with EDSA support where we need to
use DSA, and the code does not support this. So two patches refactor
the existing code. The two different register definitions are
separated out, and using DSA on an EDSA capable device is added.

v2:
Add port prefix
Add helper function for 6390
Add _IEEE_ into #defines
Split monitor_ctrl into a number of separate ops.
Remove 6390 code which is management, used in a later patch
s/EGREES/EGRESS/.
Broke up setup_port_dsa() and set_port_dsa() into a number of ops

v3:
Verify mandatory ops for port setup
Don't set ether type for DSA port.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Refactor CPU and DSA port setup
Andrew Lunn [Sat, 3 Dec 2016 03:35:19 +0000 (04:35 +0100)]
net: dsa: mv88e6xxx: Refactor CPU and DSA port setup

Older chips only support DSA tagging. Newer chips have both DSA and
EDSA tagging. Refactor the code by adding port functions for setting the
frame mode, egress mode, and if to forward unknown frames.

This results in the helper mv88e6xxx_6065_family() becoming unused, so
remove it.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
v3:
Verify mandatory ops for port setup
Don't set ether type for DSA port.
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Move the tagging protocol into info
Andrew Lunn [Sat, 3 Dec 2016 03:35:18 +0000 (04:35 +0100)]
net: dsa: mv88e6xxx: Move the tagging protocol into info

Older chips support a single tagging protocol, DSA. New chips support
both DSA and EDSA, an enhanced version. Having both as an option
changes the register layouts. Up until now, it has been assumed that
if EDSA is supported, it will be used. Hence the register layout has
been determined by which protocol should be used. However, mv88e6390
has a different implementation of EDSA, which requires we need to use
the DSA tagging. Hence separate the selection of the protocol from the
register layout.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Monitor and Management tables
Andrew Lunn [Sat, 3 Dec 2016 03:35:17 +0000 (04:35 +0100)]
net: dsa: mv88e6xxx: Monitor and Management tables

The mv88e6390 changes the monitor control register into the Monitor
and Management control, which is an indirection register to various
registers.

Add ops to set the CPU port and the ingress/egress port for both
register layouts, to global1

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: mv88e6xxx: Implement mv88e6390 tag remap
Andrew Lunn [Sat, 3 Dec 2016 03:35:16 +0000 (04:35 +0100)]
net: dsa: mv88e6xxx: Implement mv88e6390 tag remap

The mv88e6390 does not have the two registers to set the frame
priority map. Instead it has an indirection registers for setting a
number of different priority maps. Refactor the old code into an
function, implement the mv88e6390 version, and use an op to call the
right one.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'fib-notifier-event-replay'
David S. Miller [Sun, 4 Dec 2016 00:29:37 +0000 (19:29 -0500)]
Merge branch 'fib-notifier-event-replay'

Jiri Pirko says:

====================
ipv4: fib: Replay events when registering FIB notifier

Ido says:

In kernel 4.9 the switchdev-specific FIB offload mechanism was replaced
by a new FIB notification chain to which modules could register in order
to be notified about the addition and deletion of FIB entries. The
motivation for this change was that switchdev drivers need to be able to
reflect the entire FIB table and not only FIBs configured on top of the
port netdevs themselves. This is useful in case of in-band management.

The fundamental problem with this approach is that upon registration
listeners lose all the information previously sent in the chain and
thus have an incomplete view of the FIB tables, which can result in
packet loss. This patchset fixes that by dumping the FIB tables and
replaying notifications previously sent in the chain for the registered
notification block.

The entire dump process is done under RCU and thus the FIB notification
chain is converted to be atomic. The listeners are modified accordingly.
This is done in the first eight patches.

The ninth patch adds a change sequence counter to ensure the integrity
of the FIB dump. The last patch adds the dump itself to the FIB chain
registration function and modifies existing listeners to pass a callback
to be executed in case dump was inconsistent.

---
v3->v4:
- Register the notification block after the dump and protect it using
  the change sequence counter (Hannes Frederic Sowa).
- Since we now integrate the dump into the registration function, drop
  the sysctl to set maximum number of retries and instead set it to a
  fixed number. Lets see if it's really a problem before adding something
  we can never remove.
- For the same reason, dump FIB tables for all net namespaces.
- Add a comment regarding guarantees provided by mutex semantics.

v2->v3:
- Add sysctl to set the number of FIB dump retries (Hannes Frederic Sowa).
- Read the sequence counter under RTNL to ensure synchronization
  between the dump process and other processes changing the routing
  tables (Hannes Frederic Sowa).
- Pass a callback to the dump function to be executed prior to a retry.
- Limit the dump to a single net namespace.

v1->v2:
- Add a sequence counter to ensure the integrity of the FIB dump
  (David S. Miller, Hannes Frederic Sowa).
- Protect notifications from re-ordering in listeners by using an
  ordered workqueue (Hannes Frederic Sowa).
- Introduce fib_info_hold() (Jiri Pirko).
- Relieve rocker from the need to invoke the FIB dump by registering
  to the FIB notification chain prior to ports creation.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoipv4: fib: Replay events when registering FIB notifier
Ido Schimmel [Sat, 3 Dec 2016 15:45:07 +0000 (16:45 +0100)]
ipv4: fib: Replay events when registering FIB notifier

Commit b90eb7549499 ("fib: introduce FIB notification infrastructure")
introduced a new notification chain to notify listeners (f.e., switchdev
drivers) about addition and deletion of routes.

However, upon registration to the chain the FIB tables can already be
populated, which means potential listeners will have an incomplete view
of the tables.

Solve that by dumping the FIB tables and replaying the events to the
passed notification block. The dump itself is done using RCU in order
not to starve consumers that need RTNL to make progress.

The integrity of the dump is ensured by reading the FIB change sequence
counter before and after the dump under RTNL. This allows us to avoid
the problematic situation in which the dumping process sends a ENTRY_ADD
notification following ENTRY_DEL generated by another process holding
RTNL.

Callers of the registration function may pass a callback that is
executed in case the dump was inconsistent with current FIB tables.

The number of retries until a consistent dump is achieved is set to a
fixed number to prevent callers from looping for long periods of time.
In case current limit proves to be problematic in the future, it can be
easily converted to be configurable using a sysctl.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoipv4: fib: Allow for consistent FIB dumping
Ido Schimmel [Sat, 3 Dec 2016 15:45:06 +0000 (16:45 +0100)]
ipv4: fib: Allow for consistent FIB dumping

The next patch will enable listeners of the FIB notification chain to
request a dump of the FIB tables. However, since RTNL isn't taken during
the dump, it's possible for the FIB tables to change mid-dump, which
will result in inconsistency between the listener's table and the
kernel's.

Allow listeners to know about changes that occurred mid-dump, by adding
a change sequence counter to each net namespace. The counter is
incremented just before a notification is sent in the FIB chain.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoipv4: fib: Convert FIB notification chain to be atomic
Ido Schimmel [Sat, 3 Dec 2016 15:45:05 +0000 (16:45 +0100)]
ipv4: fib: Convert FIB notification chain to be atomic

In order not to hold RTNL for long periods of time we're going to dump
the FIB tables using RCU.

Convert the FIB notification chain to be atomic, as we can't block in
RCU critical sections.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorocker: Register FIB notifier before creating ports
Ido Schimmel [Sat, 3 Dec 2016 15:45:04 +0000 (16:45 +0100)]
rocker: Register FIB notifier before creating ports

We can miss FIB notifications sent between the time the ports were
created and the FIB notification block registered.

Instead of receiving these notifications only when they are replayed for
the FIB notification block during registration, just register the
notification block before the ports are created.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorocker: Implement FIB offload in deferred work
Ido Schimmel [Sat, 3 Dec 2016 15:45:03 +0000 (16:45 +0100)]
rocker: Implement FIB offload in deferred work

Convert rocker to offload FIBs in deferred work in a similar fashion to
mlxsw, which was converted in the previous commits.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorocker: Create an ordered workqueue for FIB offload
Ido Schimmel [Sat, 3 Dec 2016 15:45:02 +0000 (16:45 +0100)]
rocker: Create an ordered workqueue for FIB offload

As explained in the previous commits, we need to process FIB entries
addition / deletion events in FIFO order or otherwise we can have a
mismatch between the kernel's FIB table and the device's.

Create an ordered workqueue for rocker to which these work items will be
submitted to.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: spectrum_router: Implement FIB offload in deferred work
Ido Schimmel [Sat, 3 Dec 2016 15:45:01 +0000 (16:45 +0100)]
mlxsw: spectrum_router: Implement FIB offload in deferred work

FIB offload is currently done in process context with RTNL held, but
we're about to dump the FIB tables in RCU critical section, so we can no
longer sleep.

Instead, defer the operation to process context using deferred work. Make
sure fib info isn't freed while the work is queued by taking a reference
on it and releasing it after the operation is done.

Deferring the operation is valid because the upper layers always assume
the operation was successful. If it's not, then the driver-specific
abort mechanism is called and all routed traffic is directed to slow
path.

The work items are submitted to an ordered workqueue to prevent a
mismatch between the kernel's FIB table and the device's.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: core: Create an ordered workqueue for FIB offload
Ido Schimmel [Sat, 3 Dec 2016 15:45:00 +0000 (16:45 +0100)]
mlxsw: core: Create an ordered workqueue for FIB offload

We're going to start processing FIB entries addition / deletion events
in deferred work. These work items must be processed in the order they
were submitted or otherwise we can have differences between the kernel's
FIB table and the device's.

Solve this by creating an ordered workqueue to which these work items
will be submitted to. Note that we can't simply convert the current
workqueue to be ordered, as EMADs re-transmissions are also processed in
deferred work.

Later on, we can migrate other work items to this workqueue, such as FDB
notification processing and nexthop resolution, since they all take the
same lock anyway.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoipv4: fib: Add fib_info_hold() helper
Ido Schimmel [Sat, 3 Dec 2016 15:44:59 +0000 (16:44 +0100)]
ipv4: fib: Add fib_info_hold() helper

As explained in the previous commit, modules are going to need to take a
reference on fib info and then drop it using fib_info_put().

Add the fib_info_hold() helper to make the code more readable and also
symmetric with fib_info_put().

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Suggested-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoipv4: fib: Export free_fib_info()
Ido Schimmel [Sat, 3 Dec 2016 15:44:58 +0000 (16:44 +0100)]
ipv4: fib: Export free_fib_info()

The FIB notification chain is going to be converted to an atomic chain,
which means switchdev drivers will have to offload FIB entries in
deferred work, as hardware operations entail sleeping.

However, while the work is queued fib info might be freed, so a
reference must be taken. To release the reference (and potentially free
the fib info) fib_info_put() will be called, which in turn calls
free_fib_info().

Export free_fib_info() so that modules will be able to invoke
fib_info_put().

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoact_mirred: fix a typo in get_dev
WANG Cong [Sat, 3 Dec 2016 18:36:01 +0000 (10:36 -0800)]
act_mirred: fix a typo in get_dev

Fixes: 255cb30425c0 ("net/sched: act_mirred: Add new tc_action_ops get_dev()")
Cc: Hadar Hen Zion <hadarh@mellanox.com>
Cc: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next...
David S. Miller [Sun, 4 Dec 2016 00:10:48 +0000 (19:10 -0500)]
Merge branch '40GbE' of git://git./linux/kernel/git/jkirsher/next-queue

Jeff Kirsher says:

====================
40GbE Intel Wired LAN Driver Updates 2016-12-02

This series contains updates to i40e and i40evf only.

Alex provides changes so that we are much more robust about defining what
we can and cannot offload in i40e and i40evf by doing additional checks
other than L4 tunnel header length.

Jake provides several fixes/changes, first cleaning up a label that is
unnecessary, as well as cleaned up the use of a "magic number".  Clarified
the code by separating the global private flags and the regular private
flags per interface into two arrays, so that future additions will not
produce duplication and buggy code.  Adds additional checks to protect
against NULL values for msix_entries and q_vectors pointers.

Michal adds Clause22 method for accessing registers for some external
PHYs.

Piotr adds additional protocol support for the admin queue discover
capabilities function.

Tushar Dave fixes a panic seen on SPARC, where writel() should not be
used to write directly to a memory address but only to a memory mapped
I/O address otherwise it causes data access exceptions.

Joe Perches separates out a section of code into its own function, to
help reduce i40evf_reset_task() a bit.

Alan fixes an issue by checking for NULL before dereferencing msix_entries
and returning early in the case where it is NULL within the i40evf_close()
code path.

Henry provides code cleanup to remove unreachable and redundant sections
of code.  Fixed up an issue where new NICs were not identifying "unknown
PHYs" correctly.

Harshitha fixes a issue where the ethtool "Supported Link" modes list
backplane interfaces on X722 devices for 10 GbE with SFP+ and Cortina
retimer, where these interfaces should not be visible to the user since
they cannot use them.

Carolyn changes an X722 informational message so that it only appears
when extra messages are desired.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotcp: fix the missing avr32 SOF_TIMESTAMPING_OPT_STATS
Yuchung Cheng [Sat, 3 Dec 2016 22:46:22 +0000 (14:46 -0800)]
tcp: fix the missing avr32 SOF_TIMESTAMPING_OPT_STATS

The commit of SOF_TIMESTAMPING_OPT_STATS didn't include the
new header for avr32, causing build to break. The patch fixes it.

Fixes: 1c885808e456 ("tcp: SOF_TIMESTAMPING_OPT_STATS option for SO_TIMESTAMPING")
Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoudp: be less conservative with sock rmem accounting
Paolo Abeni [Fri, 2 Dec 2016 16:35:49 +0000 (17:35 +0100)]
udp: be less conservative with sock rmem accounting

Before commit 850cbaddb52d ("udp: use it's own memory accounting
schema"), the udp protocol allowed sk_rmem_alloc to grow beyond
the rcvbuf by the whole current packet's truesize. After said commit
we allow sk_rmem_alloc to exceed the rcvbuf only if the receive queue
is empty. As reported by Jesper this cause a performance regression
for some (small) values of rcvbuf.

This commit is intended to fix the regression restoring the old
handling of the rcvbuf limit.

Reported-by: Jesper Dangaard Brouer <brouer@redhat.com>
Fixes: 850cbaddb52d ("udp: use it's own memory accounting schema")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: gen_estimator: account for timer drifts
Eric Dumazet [Fri, 2 Dec 2016 16:11:00 +0000 (08:11 -0800)]
net_sched: gen_estimator: account for timer drifts

Under heavy stress, timer used in estimators tend to slowly be delayed
by a few jiffies, leading to inaccuracies.

Lets remember what was the last scheduled jiffies so that we get more
precise estimations, without having to add a multiply/divide in the loop
to account for the drifts.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosfc: remove EFX_BUG_ON_PARANOID, use EFX_WARN_ON_[ONCE_]PARANOID instead
Edward Cree [Fri, 2 Dec 2016 15:51:33 +0000 (15:51 +0000)]
sfc: remove EFX_BUG_ON_PARANOID, use EFX_WARN_ON_[ONCE_]PARANOID instead

Logically, EFX_BUG_ON_PARANOID can never be correct.  For, BUG_ON should
 only be used if it is not possible to continue without potential harm;
 and since the non-DEBUG driver will continue regardless (as the BUG_ON is
 compiled out), clearly the BUG_ON cannot be needed in the DEBUG driver.
So, replace every EFX_BUG_ON_PARANOID with either an EFX_WARN_ON_PARANOID
 or the newly defined EFX_WARN_ON_ONCE_PARANOID.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'samples-bpf-automated-cgroup-tests'
David S. Miller [Sat, 3 Dec 2016 21:08:01 +0000 (16:08 -0500)]
Merge branch 'samples-bpf-automated-cgroup-tests'

Sargun Dhillon says:

====================
samples, bpf: Refactor; Add automated tests for cgroups

These two patches are around refactoring out some old, reusable code from the
existing test_current_task_under_cgroup_user test, and adding a new, automated
test.

There is some generic cgroupsv2 setup & cleanup code, given that most
environment still don't have it setup by default. With this code, we're able
to pretty easily add an automated test for future cgroupsv2 functionality.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosamples, bpf: Add automated test for cgroup filter attachments
Sargun Dhillon [Fri, 2 Dec 2016 10:42:32 +0000 (02:42 -0800)]
samples, bpf: Add automated test for cgroup filter attachments

This patch adds the sample program test_cgrp2_attach2. This program is
similar to test_cgrp2_attach, but it performs automated testing of the
cgroupv2 BPF attached filters. It runs the following checks:
* Simple filter attachment
* Application of filters to child cgroups
* Overriding filters on child cgroups
* Checking that this still works when the parent filter is removed

The filters that are used here are simply allow all / deny all filters, so
it isn't checking the actual functionality of the filters, but rather
the behaviour  around detachment / attachment. If net_cls is enabled,
this test will fail.

Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosamples, bpf: Refactor test_current_task_under_cgroup - separate out helpers
Sargun Dhillon [Fri, 2 Dec 2016 10:42:18 +0000 (02:42 -0800)]
samples, bpf: Refactor test_current_task_under_cgroup - separate out helpers

This patch modifies test_current_task_under_cgroup_user. The test has
several helpers around creating a temporary environment for cgroup
testing, and moving the current task around cgroups. This set of
helpers can then be used in other tests.

Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosamples/bpf: silence compiler warnings
Alexei Starovoitov [Fri, 2 Dec 2016 02:31:12 +0000 (18:31 -0800)]
samples/bpf: silence compiler warnings

silence some of the clang compiler warnings like:
include/linux/fs.h:2693:9: warning: comparison of unsigned enum expression < 0 is always false
arch/x86/include/asm/processor.h:491:30: warning: taking address of packed member 'sp0' of class or structure 'x86_hw_tss' may result in an unaligned pointer value
include/linux/cgroup-defs.h:326:16: warning: field 'cgrp' with variable sized type 'struct cgroup' not at the end of a struct or class is a GNU extension
since they add too much noise to samples/bpf/ build.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonetns: fix net_generic() "id - 1" bloat
Alexey Dobriyan [Fri, 2 Dec 2016 01:21:32 +0000 (04:21 +0300)]
netns: fix net_generic() "id - 1" bloat

net_generic() function is both a) inline and b) used ~600 times.

It has the following code inside

...
ptr = ng->ptr[id - 1];
...

"id" is never compile time constant so compiler is forced to subtract 1.
And those decrements or LEA [r32 - 1] instructions add up.

We also start id'ing from 1 to catch bugs where pernet sybsystem id
is not initialized and 0. This is quite pointless idea (nothing will
work or immediate interference with first registered subsystem) in
general but it hints what needs to be done for code size reduction.

Namely, overlaying allocation of pointer array and fixed part of
structure in the beginning and using usual base-0 addressing.

Ids are just cookies, their exact values do not matter, so lets start
with 3 on x86_64.

Code size savings (oh boy): -4.2 KB

As usual, ignore the initial compiler stupidity part of the table.

add/remove: 0/0 grow/shrink: 12/670 up/down: 89/-4297 (-4208)
function                                     old     new   delta
tipc_nametbl_insert_publ                    1250    1270     +20
nlmclnt_lookup_host                          686     703     +17
nfsd4_encode_fattr                          5930    5941     +11
nfs_get_client                              1050    1061     +11
register_pernet_operations                   333     342      +9
tcf_mirred_init                              843     849      +6
tcf_bpf_init                                1143    1149      +6
gss_setup_upcall                             990     994      +4
idmap_name_to_id                             432     434      +2
ops_init                                     274     275      +1
nfsd_inject_forget_client                    259     260      +1
nfs4_alloc_client                            612     613      +1
tunnel_key_walker                            164     163      -1

...

tipc_bcbase_select_primary                   392     360     -32
mac80211_hwsim_new_radio                    2808    2767     -41
ipip6_tunnel_ioctl                          2228    2186     -42
tipc_bcast_rcv                               715     672     -43
tipc_link_build_proto_msg                   1140    1089     -51
nfsd4_lock                                  3851    3796     -55
tipc_mon_rcv                                1012     956     -56
Total: Before=156643951, After=156639743, chg -0.00%

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonetns: add dummy struct inside "struct net_generic"
Alexey Dobriyan [Fri, 2 Dec 2016 01:12:58 +0000 (04:12 +0300)]
netns: add dummy struct inside "struct net_generic"

This is precursor to fixing "[id - 1]" bloat inside net_generic().

Name "s" is chosen to complement name "u" often used for dummy unions.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonetns: publish net_generic correctly
Alexey Dobriyan [Fri, 2 Dec 2016 01:11:34 +0000 (04:11 +0300)]
netns: publish net_generic correctly

Publishing net_generic pointer is done with silly mistake: new array is
published BEFORE setting freshly acquired pernet subsystem pointer.

memcpy
rcu_assign_pointer
kfree_rcu
ng->ptr[id - 1] = data;

This bug was introduced with commit dec827d174d7f76c457238800183ca864a639365
("[NETNS]: The generic per-net pointers.") in the glorious days of
chopping networking stack into containers proper 8.5 years ago (whee...)

How it didn't trigger for so long?
Well, you need quite specific set of conditions:

*) race window opens once per pernet subsystem addition
   (read: modprobe or boot)

*) not every pernet subsystem is eligible (need ->id and ->size)

*) not every pernet subsystem is vulnerable (need incorrect or absense
   of ordering of register_pernet_sybsys() and actually using net_generic())

*) to hide the bug even more, default is to preallocate 13 pointers which
   is actually quite a lot. You need IPv6, netfilter, bridging etc together
   loaded to trigger reallocation in the first place. Trimmed down
   config are OK.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonetlink: 2-clause nla_ok()
Alexey Dobriyan [Fri, 2 Dec 2016 00:59:06 +0000 (03:59 +0300)]
netlink: 2-clause nla_ok()

nla_ok() consists of 3 clauses:

1) int rem >= (int)sizeof(struct nlattr)

2) u16 nla_len >= sizeof(struct nlattr)

3) u16 nla_len <= int rem

The statement is that clause (1) is redundant.

What it does is ensuring that "rem" is a positive number,
so that in clause (3) positive number will be compared to positive number
with no problems.

However, "u16" fully fits into "int" and integers do not change value
when upcasting even to signed type. Negative integers will be rejected
by clause (3) just fine. Small positive integers will be rejected
by transitivity of comparison operator.

NOTE: all of the above DOES NOT apply to nlmsg_ok() where ->nlmsg_len is
u32(!), so 3 clauses AND A CAST TO INT are necessary.

Obligatory space savings report: -1.6 KB

$ ./scripts/bloat-o-meter ../vmlinux-000* ../vmlinux-001*
add/remove: 0/0 grow/shrink: 3/63 up/down: 35/-1692 (-1657)
function                                     old     new   delta
validate_scan_freqs                          142     155     +13
tcf_em_tree_validate                         867     879     +12
dcbnl_ieee_del                               328     338     +10
netlbl_cipsov4_add_common.isra               218     215      -3
...
ovs_nla_put_actions                          888     806     -82
netlbl_cipsov4_add_std                      1648    1566     -82
nl80211_parse_sched_scan                    2889    2780    -109
ip_tun_from_nlattr                          3086    2945    -141

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agostaging: wilc1000: use reset to set mac header
Zhang Shengju [Fri, 2 Dec 2016 01:51:07 +0000 (09:51 +0800)]
staging: wilc1000: use reset to set mac header

Since offset is zero, it's not necessary to use set function. Reset
function is straightforward, and will remove the unnecessary add
operation in set function.

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoiwlwifi: use reset to set transport header
Zhang Shengju [Fri, 2 Dec 2016 01:51:06 +0000 (09:51 +0800)]
iwlwifi: use reset to set transport header

Since offset is zero, it's not necessary to use set function. Reset
function is straightforward, and will remove the unnecessary add
operation in set function.

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlx4: use reset to set mac header
Zhang Shengju [Fri, 2 Dec 2016 01:51:05 +0000 (09:51 +0800)]
mlx4: use reset to set mac header

Since offset is zero, it's not necessary to use set function. Reset
function is straightforward, and will remove the unnecessary add
operation in set function.

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobnx2x: use reset to set network header
Zhang Shengju [Fri, 2 Dec 2016 01:51:04 +0000 (09:51 +0800)]
bnx2x: use reset to set network header

Since offset is zero, it's not necessary to use set function. Reset
function is straightforward, and will remove the unnecessary add
operation in set function.

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqede: use reset to set network header
Zhang Shengju [Fri, 2 Dec 2016 01:51:03 +0000 (09:51 +0800)]
qede: use reset to set network header

Since offset is zero, it's not necessary to use set function. Reset
function is straightforward, and will remove the unnecessary add
operation in set function.

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Acked-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'xgene-jumbo-and-pause-frame'
David S. Miller [Sat, 3 Dec 2016 20:46:51 +0000 (15:46 -0500)]
Merge branch 'xgene-jumbo-and-pause-frame'

Iyappan Subramanian says:

====================
drivers: net: xgene: Add Jumbo and Pause frame support

This patch set adds,

1. Jumbo frame support
2. Pause frame based flow control

and fixes RSS for non-TCP/UDP packets.
====================

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
8 years agodrivers: net: xgene: ethtool: Add get/set_pauseparam
Iyappan Subramanian [Fri, 2 Dec 2016 00:41:44 +0000 (16:41 -0800)]
drivers: net: xgene: ethtool: Add get/set_pauseparam

This patch adds get_pauseparam and set_pauseparam functions.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrivers: net: xgene: Add flow control initialization
Iyappan Subramanian [Fri, 2 Dec 2016 00:41:43 +0000 (16:41 -0800)]
drivers: net: xgene: Add flow control initialization

This patch adds flow control/pause frame initialization and
advertising capabilities.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrivers: net: xgene: Add flow control configuration
Iyappan Subramanian [Fri, 2 Dec 2016 00:41:42 +0000 (16:41 -0800)]
drivers: net: xgene: Add flow control configuration

This patch adds functions to configure mac, when flow control
and pause frame settings change.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrivers: net: xgene: fix: RSS for non-TCP/UDP
Iyappan Subramanian [Fri, 2 Dec 2016 00:41:41 +0000 (16:41 -0800)]
drivers: net: xgene: fix: RSS for non-TCP/UDP

This patch fixes RSS feature, for non-TCP/UDP packets.

Signed-off-by: Khuong Dinh <kdinh@apm.com>
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrivers: net: xgene: Add change_mtu function
Iyappan Subramanian [Fri, 2 Dec 2016 00:41:40 +0000 (16:41 -0800)]
drivers: net: xgene: Add change_mtu function

This patch implements ndo_change_mtu() callback function that
enables mtu change.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrivers: net: xgene: Add support for Jumbo frame
Iyappan Subramanian [Fri, 2 Dec 2016 00:41:39 +0000 (16:41 -0800)]
drivers: net: xgene: Add support for Jumbo frame

This patch adds support for jumbo frame, by allocating
additional buffer (page) pool and configuring the hardware.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrivers: net: xgene: Configure classifier with pagepool
Iyappan Subramanian [Fri, 2 Dec 2016 00:41:38 +0000 (16:41 -0800)]
drivers: net: xgene: Configure classifier with pagepool

This patch configures classifier with the pagepool information.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrivers: net: xgene: Add helper function
Iyappan Subramanian [Fri, 2 Dec 2016 00:41:37 +0000 (16:41 -0800)]
drivers: net: xgene: Add helper function

This is a prepartion patch and adds xgene_enet_get_fpsel() helper
function to get buffer pool number.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: ethernet: ti: davinci_cpdma: add missing EXPORTs
Paul Gortmaker [Thu, 1 Dec 2016 20:25:28 +0000 (15:25 -0500)]
net: ethernet: ti: davinci_cpdma: add missing EXPORTs

As of commit 8f32b90981dcdb355516fb95953133f8d4e6b11d
("net: ethernet: ti: davinci_cpdma: add set rate for a channel") the
ARM allmodconfig builds would fail modpost with:

ERROR: "cpdma_chan_set_weight" [drivers/net/ethernet/ti/ti_cpsw.ko] undefined!
ERROR: "cpdma_chan_get_rate" [drivers/net/ethernet/ti/ti_cpsw.ko] undefined!
ERROR: "cpdma_chan_get_min_rate" [drivers/net/ethernet/ti/ti_cpsw.ko] undefined!
ERROR: "cpdma_chan_set_rate" [drivers/net/ethernet/ti/ti_cpsw.ko] undefined!

Since these weren't declared as static, it is assumed they were
meant to be shared outside the file, and that modular build testing
was simply overlooked.

Fixes: 8f32b90981dc ("net: ethernet: ti: davinci_cpdma: add set rate for a channel")
Cc: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: linux-omap@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'linux-can-next-for-4.10-20161201' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Sat, 3 Dec 2016 20:26:30 +0000 (15:26 -0500)]
Merge tag 'linux-can-next-for-4.10-20161201' of git://git./linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2016-12-01

this is a pull request of 4 patches for net-next/master.

There are two patches by Chris Paterson for the rcar_can and rcar_canfd
device tree binding documentation. And a patch by Geert Uytterhoeven
that corrects the order of interrupt specifiers.

The fourth patch by Colin Ian King fixes a spelling error in the
kvaser_usb driver.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: stmmac: unify mdio functions
LABBE Corentin [Thu, 1 Dec 2016 15:19:41 +0000 (16:19 +0100)]
net: stmmac: unify mdio functions

stmmac_mdio_{read|write} and stmmac_mdio_{read|write}_gmac4 are not
enought different for being split.
The only differences between thoses two functions are shift/mask for
addr/reg/clk_csr.

This patch introduce a per platform set of variable for setting thoses
shift/mask and unify mdio read and write functions.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: stmmac: avoid Camelcase naming
LABBE Corentin [Thu, 1 Dec 2016 15:19:40 +0000 (16:19 +0100)]
net: stmmac: avoid Camelcase naming

This patch simply rename regValue to value, like it was named in other
mdio functions.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoirda: w83977af_ir: fix damaged whitespace
Arnd Bergmann [Mon, 28 Nov 2016 14:19:43 +0000 (15:19 +0100)]
irda: w83977af_ir: fix damaged whitespace

As David Miller pointed out for for the previous patch, the whitespace
in some functions looks rather odd. This was caused by commit 6329da5f258a
("obsolete config in kernel source: USE_INTERNAL_TIMER"), which removed
some conditions but did not reindent the code.

This fixes the indentation in the file and removes extraneous whitespace
at the end of the lines and before tabs.

There are many other minor coding style problems in the driver, but I'm
not touching those here.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agostmmac: cleanup documenation, make it match reality
Pavel Machek [Thu, 1 Dec 2016 10:32:18 +0000 (11:32 +0100)]
stmmac: cleanup documenation, make it match reality

Fix english in documentation, make documentation match reality, remove
options that were removed from code.

Signed-off-by: Pavel Machek <pavel@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
David S. Miller [Sat, 3 Dec 2016 16:46:54 +0000 (11:46 -0500)]
Merge git://git./linux/kernel/git/davem/net

Couple conflicts resolved here:

1) In the MACB driver, a bug fix to properly initialize the
   RX tail pointer properly overlapped with some changes
   to support variable sized rings.

2) In XGBE we had a "CONFIG_PM" --> "CONFIG_PM_SLEEP" fix
   overlapping with a reorganization of the driver to support
   ACPI, OF, as well as PCI variants of the chip.

3) In 'net' we had several probe error path bug fixes to the
   stmmac driver, meanwhile a lot of this code was cleaned up
   and reorganized in 'net-next'.

4) The cls_flower classifier obtained a helper function in
   'net-next' called __fl_delete() and this overlapped with
   Daniel Borkamann's bug fix to use RCU for object destruction
   in 'net'.  It also overlapped with Jiri's change to guard
   the rhashtable_remove_fast() call with a check against
   tc_skip_sw().

5) In mlx4, a revert bug fix in 'net' overlapped with some
   unrelated changes in 'net-next'.

6) In geneve, a stale header pointer after pskb_expand_head()
   bug fix in 'net' overlapped with a large reorganization of
   the same code in 'net-next'.  Since the 'net-next' code no
   longer had the bug in question, there was nothing to do
   other than to simply take the 'net-next' hunks.

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoi40e: change message to only appear when extra debug info is wanted
Carolyn Wyborny [Tue, 8 Nov 2016 21:05:12 +0000 (13:05 -0800)]
i40e: change message to only appear when extra debug info is wanted

This patch changes an X722 informational message so that it only
appears when extra messages are desired.  Without this patch,
on X722 devices, this message appears at load, potentially causing
unnecessary alarm.

Change-ID: I94f7aae15dc5b2723cc9728c630c72538a3e670e
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40e/i40evf: replace for memcpy with single memcpy call in ethtool
Jacob Keller [Tue, 8 Nov 2016 21:05:11 +0000 (13:05 -0800)]
i40e/i40evf: replace for memcpy with single memcpy call in ethtool

memcpy replaced with single memcpy call in ethtool.

Change-ID: I3f5bef6bcc593412c56592c6459784db41575a0a
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40e: set broadcast promiscuous mode for each active VLAN
Jacob Keller [Tue, 8 Nov 2016 21:05:10 +0000 (13:05 -0800)]
i40e: set broadcast promiscuous mode for each active VLAN

A previous workaround added to ensure receipt of all broadcast frames
incorrectly set the broadcast promiscuous mode unconditionally
regardless of active VLAN status.

Replace this partial workaround with a complete solution that sets the
broadcast promiscuous filters in i40e_sync_vsi_filters. This new method
sets the promiscuous mode based on when broadcast filters are added or
removed.

I40E_VLAN_ANY will request a broadcast filter for all VLANs, (as we're
in untagged mode) while a broadcast filter on a specific VLAN will only
request broadcast for that VLAN.

Thus, we restore addition of broadcast filter to the array, but we add
special handling for these such that they enable the broadcast
promiscuous mode instead of being sent as regular filters.

The end result is that we will correctly receive all broadcast packets
(even those with a *source* address equal to the broadcast address) but
will not receive packets for which we don't have an active VLAN filter.

Change-ID: I7d0585c5cec1a5bf55bf533b42e5e817d5db6a2d
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40e: Fix for ethtool Supported link modes
Harshitha Ramamurthy [Tue, 8 Nov 2016 21:05:09 +0000 (13:05 -0800)]
i40e: Fix for ethtool Supported link modes

This patch fixes the problem where the ethtool Supported link
modes list backplane interfaces on X722 devices for 10GbE with
SFP+ and Cortina retimer. This patch fixes the problem by setting
and using a flag for this particular device since the backplane
interface is only between the internal PHY and the retimer and it
should not be seen by the user as they cannot use it.
Without this patch, the user wrongly thinks that backplane interfaces
are supported on their device when they actually are not.

Change-ID: I3882bc2928431d48a2db03a51a713a1f681a79e9
Signed-off-by: Harshitha Ramamurthy <harshitha.ramamurthy@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40evf: protect against NULL msix_entries and q_vectors pointers
Jacob Keller [Tue, 8 Nov 2016 21:05:08 +0000 (13:05 -0800)]
i40evf: protect against NULL msix_entries and q_vectors pointers

Update the functions which free msix_entries and q_vectors so that they
are safe against NULL values. This allows calling code to not care
whether these have already been freed when disabling and freeing them.

Change-ID: I31bfd1c0da18023d971b618edc6fb049721f3298
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40e: Pass unknown PHY type for unknown PHYs
Henry Tieman [Tue, 8 Nov 2016 21:05:07 +0000 (13:05 -0800)]
i40e: Pass unknown PHY type for unknown PHYs

The PHY type value for unrecognized PHYs and cables was changed
based on firmware version number. Newer hardware use lower firmware
version numbers and this was causing some PHYs to be identified
as type 0x16 instead of 0xe (unknown).

Without this patch, newer card will incorrectly identify unknown
PHYs and cables.

This change adds hardware type to the check for firmware version
so the PHY type is reported correctly.

Change-ID: I0723cbfd263c76fc73ff1a5275d1639051376c9a
Signed-off-by: Henry Tieman <henry.w.tieman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40e: Remove unreachable code
Henry Tieman [Tue, 8 Nov 2016 21:05:06 +0000 (13:05 -0800)]
i40e: Remove unreachable code

The code at the end of i40e_read_phy_register_clause22() contained
unreachable code and redundant control statements.

This change removes the unreachable code. And deletes the redundant
goto statement and if statement.

Change-ID: I713032b1585396f40f903cbcfdea987abd874400
Signed-off-by: Henry Tieman <henry.w.tieman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40evf: check for msix_entries null dereference
Alan Brady [Tue, 8 Nov 2016 21:05:05 +0000 (13:05 -0800)]
i40evf: check for msix_entries null dereference

It is possible for msix_entries to be freed by a previous suspend/remove
before a VF is closed.  This patch fixes the issue by checking for NULL
before dereferencing msix_entries and returning early in the case where
it is NULL within the i40evf_close code path.  Without this patch it is
possible to trigger a kernel panic through NULL dereference.

Change-ID: I92a2746e82533a889e25f91578eac9abd0388ae2
Signed-off-by: Alan Brady <alan.brady@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40evf: Move some i40evf_reset_task code to separate function
Joe Perches [Tue, 1 Nov 2016 22:35:14 +0000 (15:35 -0700)]
i40evf: Move some i40evf_reset_task code to separate function

The i40evf_reset_task function is a couple hundred lines and it has
a separable block that disables VF.  Move that block to a new
i40evf_disable_vf function to shorten i40evf_reset_task a bit.

Signed-off-by: Joe Perches <joe@perches.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40e: fix panic on SPARC while changing num of desc
Tushar Dave [Wed, 26 Oct 2016 17:49:27 +0000 (10:49 -0700)]
i40e: fix panic on SPARC while changing num of desc

On SPARC, writel() should not be used to write directly to memory
address but only to memory mapped I/O address otherwise it causes
data access exception.

Commit 147e81ec75689 ("i40e: Test memory before ethtool alloc
succeeds") introduced a code that uses memory address to fake the HW
tail address and attempt to write to that address using writel()
causes kernel panic on SPARC. The issue is reproduced while changing
number of descriptors using ethtool.

This change resolves the panic by using HW read-only memory mapped
I/O register to fake HW tail address instead memory address.

e.g.
> ethtool -G eth2 tx 2048 rx 2048
i40e 0000:03:00.2 eth2: Changing Tx descriptor count from 512 to 2048.
i40e 0000:03:00.2 eth2: Changing Rx descriptor count from 512 to 2048
sun4v_data_access_exception: ADDR[fff8001f9734a000] CTX[0000]
TYPE[0004], going.
              \|/ ____ \|/
              "@'/ .. \`@"
              /_| \__/ |_\
                 \__U_/
ethtool(3273): Dax [#1]
CPU: 9 PID: 3273 Comm: ethtool Tainted: G            E
4.8.0-linux-net_temp+ #7
task: fff8001f96d7a660 task.stack: fff8001f97348000
TSTATE: 0000009911001601 TPC: 00000000103189e4 TNPC: 00000000103189e8 Y:
00000000    Tainted: G            E
TPC: <i40e_alloc_rx_buffers+0x124/0x260 [i40e]>
g0: fff8001f4eb64000 g1: 00000000000007ff g2: fff8001f9734b92c g3:
00203e0000000000
g4: fff8001f96d7a660 g5: fff8001fa6704000 g6: fff8001f97348000 g7:
0000000000000001
o0: 0006000046706928 o1: 00000000db3e2000 o2: fff8001f00000000 o3:
0000000000002000
o4: 0000000000002000 o5: 0000000000000001 sp: fff8001f9734afc1 ret_pc:
0000000010318a64
RPC: <i40e_alloc_rx_buffers+0x1a4/0x260 [i40e]>
l0: fff8001f4e8bffe0 l1: fff8001f4e8cffe0 l2: 00000000000007ff l3:
00000000ff000000
l4: 0000000000ff0000 l5: 000000000000ff00 l6: 0000000000cda6a8 l7:
0000000000e822f0
i0: fff8001f96380000 i1: 0000000000000000 i2: 00203edb00000000 i3:
0006000046706928
i4: 0000000002086320 i5: 0000000000e82370 i6: fff8001f9734b071 i7:
00000000103062d4
I7: <i40e_set_ringparam+0x3b4/0x540 [i40e]>
Call Trace:
 [00000000103062d4] i40e_set_ringparam+0x3b4/0x540 [i40e]
 [000000000094e2f8] dev_ethtool+0x898/0xbe0
 [0000000000965570] dev_ioctl+0x250/0x300
 [0000000000923800] sock_do_ioctl+0x40/0x60
 [000000000092427c] sock_ioctl+0x7c/0x280
 [00000000005ef040] vfs_ioctl+0x20/0x60
 [00000000005ef5d4] do_vfs_ioctl+0x194/0x4c0
 [00000000005ef974] SyS_ioctl+0x74/0xa0
 [0000000000406214] linux_sparc_syscall+0x34/0x44
Disabling lock debugging due to kernel taint
Caller[00000000103062d4]: i40e_set_ringparam+0x3b4/0x540 [i40e]
Caller[000000000094e2f8]: dev_ethtool+0x898/0xbe0
Caller[0000000000965570]: dev_ioctl+0x250/0x300
Caller[0000000000923800]: sock_do_ioctl+0x40/0x60
Caller[000000000092427c]: sock_ioctl+0x7c/0x280
Caller[00000000005ef040]: vfs_ioctl+0x20/0x60
Caller[00000000005ef5d4]: do_vfs_ioctl+0x194/0x4c0
Caller[00000000005ef974]: SyS_ioctl+0x74/0xa0
Caller[0000000000406214]: linux_sparc_syscall+0x34/0x44
Caller[0000000000107154]: 0x107154
Instruction DUMP: e43620c8
 e436204a  c45e2038
<c2a083a082102000
 81cfe008  90086001
 82102000  81cfe008

Kernel panic - not syncing: Fatal exception

Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40e: Add protocols over MCTP to i40e_aq_discover_capabilities
Piotr Raczynski [Tue, 25 Oct 2016 23:08:53 +0000 (16:08 -0700)]
i40e: Add protocols over MCTP to i40e_aq_discover_capabilities

Add logical_id to I40E_AQ_CAP_ID_MNG_MODE capability starting from major
version 2.

Change-ID: Idb29214b172ea5c70cbd45a99e6745c0215af7e4
Signed-off-by: Piotr Raczynski <piotr.raczynski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40e: fix trivial typo in naming of i40e_sync_filters_subtask
Jacob Keller [Tue, 25 Oct 2016 23:08:52 +0000 (16:08 -0700)]
i40e: fix trivial typo in naming of i40e_sync_filters_subtask

A comment incorrectly referred to i40e_vsi_sync_filters_subtask which
does not actually exist. Reference the correct function instead.

Change-ID: I6bd805c605741ffb6fe34377259bb0d597edfafd
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
8 years agoi40e: Add Clause22 implementation
Michal Kosiarz [Tue, 25 Oct 2016 23:08:51 +0000 (16:08 -0700)]
i40e: Add Clause22 implementation

Some external PHYs require Clause22 method for accessing registers.
This patch also adds some defines to support blink led on devices using
10CBaseT PHY.

Change-ID: I868a4326911900f6c89e7e522fda4968b0825f14
Signed-off-by: Michal Kosiarz <michal.kosiarz@intel.com>
Signed-off-by: Matt Jared <matthew.a.jared@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>