Refactor the codes that populate the value
of a htab_elem in a BPF_MAP_TYPE_PERCPU_HASH
typed bpf_map.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Instead of having a common LRU list, this patch allows a
percpu LRU list which can be selected by specifying a map
attribute.  The map attribute will be added in the later
patch.

While the common use case for LRU is #reads >> #updates,
percpu LRU list allows bpf prog to absorb unusual #updates
under pathological case (e.g. external traffic facing machine which
could be under attack).

Each percpu LRU is isolated from each other.  The LRU nodes (including
free nodes) cannot be moved across different LRU Lists.

Here are the update performance comparison between
common LRU list and percpu LRU list (the test code is
at the last patch):

[root@kerneltest003.31.prn1 ~]# for i in 1 4 8; do echo -n "$i cpus: "; \
./map_perf_test 16 $i | awk '{r += $3}END{print r " updates"}'; done
 1 cpus: 2934082 updates
 4 cpus: 7391434 updates
 8 cpus: 6500576 updates

[root@kerneltest003.31.prn1 ~]# for i in 1 4 8; do echo -n "$i cpus: "; \
./map_perf_test 32 $i | awk '{r += $3}END{printr " updates"}'; done
  1 cpus: 2896553 updates
  4 cpus: 9766395 updates
  8 cpus: 17460553 updates
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Introduce bpf_lru_list which will provide LRU capability to
the bpf_htab in the later patch.

* General Thoughts:
1. Target use case.  Read is more often than update.
   (i.e. bpf_lookup_elem() is more often than bpf_update_elem()).
   If bpf_prog does a bpf_lookup_elem() first and then an in-place
   update, it still counts as a read operation to the LRU list concern.
2. It may be useful to think of it as a LRU cache
3. Optimize the read case
   3.1 No lock in read case
   3.2 The LRU maintenance is only done during bpf_update_elem()
4. If there is a percpu LRU list, it will lose the system-wise LRU
   property.  A completely isolated percpu LRU list has the best
   performance but the memory utilization is not ideal considering
   the work load may be imbalance.
5. Hence, this patch starts the LRU implementation with a global LRU
   list with batched operations before accessing the global LRU list.
   As a LRU cache, #read >> #update/#insert operations, it will work well.
6. There is a local list (for each cpu) which is named
   'struct bpf_lru_locallist'.  This local list is not used to sort
   the LRU property.  Instead, the local list is to batch enough
   operations before acquiring the lock of the global LRU list.  More
   details on this later.
7. In the later patch, it allows a percpu LRU list by specifying a
   map-attribute for scalability reason and for use cases that need to
   prepare for the worst (and pathological) case like DoS attack.
   The percpu LRU list is completely isolated from each other and the
   LRU nodes (including free nodes) cannot be moved across the list.  The
   following description is for the global LRU list but mostly applicable
   to the percpu LRU list also.

* Global LRU List:
1. It has three sub-lists: active-list, inactive-list and free-list.
2. The two list idea, active and inactive, is borrowed from the
   page cache.
3. All nodes are pre-allocated and all sit at the free-list (of the
   global LRU list) at the beginning.  The pre-allocation reasoning
   is similar to the existing BPF_MAP_TYPE_HASH.  However,
   opting-out prealloc (BPF_F_NO_PREALLOC) is not supported in
   the LRU map.

* Active/Inactive List (of the global LRU list):
1. The active list, as its name says it, maintains the active set of
   the nodes.  We can think of it as the working set or more frequently
   accessed nodes.  The access frequency is approximated by a ref-bit.
   The ref-bit is set during the bpf_lookup_elem().
2. The inactive list, as its name also says it, maintains a less
   active set of nodes.  They are the candidates to be removed
   from the bpf_htab when we are running out of free nodes.
3. The ordering of these two lists is acting as a rough clock.
   The tail of the inactive list is the older nodes and
   should be released first if the bpf_htab needs free element.

* Rotating the Active/Inactive List (of the global LRU list):
1. It is the basic operation to maintain the LRU property of
   the global list.
2. The active list is only rotated when the inactive list is running
   low.  This idea is similar to the current page cache.
   Inactive running low is currently defined as
   "# of inactive < # of active".
3. The active list rotation always starts from the tail.  It moves
   node without ref-bit set to the head of the inactive list.
   It moves node with ref-bit set back to the head of the active
   list and then clears its ref-bit.
4. The inactive rotation is pretty simply.
   It walks the inactive list and moves the nodes back to the head of
   active list if its ref-bit is set. The ref-bit is cleared after moving
   to the active list.
   If the node does not have ref-bit set, it just leave it as it is
   because it is already in the inactive list.

* Shrinking the Inactive List (of the global LRU list):
1. Shrinking is the operation to get free nodes when the bpf_htab is
   full.
2. It usually only shrinks the inactive list to get free nodes.
3. During shrinking, it will walk the inactive list from the tail,
   delete the nodes without ref-bit set from bpf_htab.
4. If no free node found after step (3), it will forcefully get
   one node from the tail of inactive or active list.  Forcefully is
   in the sense that it ignores the ref-bit.

* Local List:
1. Each CPU has a 'struct bpf_lru_locallist'.  The purpose is to
   batch enough operations before acquiring the lock of the
   global LRU.
2. A local list has two sub-lists, free-list and pending-list.
3. During bpf_update_elem(), it will try to get from the free-list
   of (the current CPU local list).
4. If the local free-list is empty, it will acquire from the
   global LRU list.  The global LRU list can either satisfy it
   by its global free-list or by shrinking the global inactive
   list.  Since we have acquired the global LRU list lock,
   it will try to get at most LOCAL_FREE_TARGET elements
   to the local free list.
5. When a new element is added to the bpf_htab, it will
   first sit at the pending-list (of the local list) first.
   The pending-list will be flushed to the global LRU list
   when it needs to acquire free nodes from the global list
   next time.

* Lock Consideration:
The LRU list has a lock (lru_lock).  Each bucket of htab has a
lock (buck_lock).  If both locks need to be acquired together,
the lock order is always lru_lock -> buck_lock and this only
happens in the bpf_lru_list.c logic.

In hashtab.c, both locks are not acquired together (i.e. one
lock is always released first before acquiring another lock).
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Several cases of bug fixes in 'net' overlapping other changes in
'net-next-.
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull networking fixes from David Miller:

 1) Fix off by one wrt. indexing when dumping /proc/net/route entries,
    from Alexander Duyck.

 2) Fix lockdep splats in iwlwifi, from Johannes Berg.

 3) Cure panic when inserting certain netfilter rules when NFT_SET_HASH
    is disabled, from Liping Zhang.

 4) Memory leak when nft_expr_clone() fails, also from Liping Zhang.

 5) Disable UFO when path will apply IPSEC tranformations, from Jakub
    Sitnicki.

 6) Don't bogusly double cwnd in dctcp module, from Florian Westphal.

 7) skb_checksum_help() should never actually use the value "0" for the
    resulting checksum, that has a special meaning, use CSUM_MANGLED_0
    instead. From Eric Dumazet.

 8) Per-tx/rx queue statistic strings are wrong in qed driver, fix from
    Yuval MIntz.

 9) Fix SCTP reference counting of associations and transports in
    sctp_diag. From Xin Long.

10) When we hit ip6tunnel_xmit() we could have come from an ipv4 path in
    a previous layer or similar, so explicitly clear the ipv6 control
    block in the skb. From Eli Cooper.

11) Fix bogus sleeping inside of inet_wait_for_connect(), from WANG
    Cong.

12) Correct deivce ID of T6 adapter in cxgb4 driver, from Hariprasad
    Shenai.

13) Fix potential access past the end of the skb page frag array in
    tcp_sendmsg(). From Eric Dumazet.

14) 'skb' can legitimately be NULL in inet{,6}_exact_dif_match(). Fix
    from David Ahern.

15) Don't return an error in tcp_sendmsg() if we wronte any bytes
    successfully, from Eric Dumazet.

16) Extraneous unlocks in netlink_diag_dump(), we removed the locking
    but forgot to purge these unlock calls. From Eric Dumazet.

17) Fix memory leak in error path of __genl_register_family(). We leak
    the attrbuf, from WANG Cong.

18) cgroupstats netlink policy table is mis-sized, from WANG Cong.

19) Several XDP bug fixes in mlx5, from Saeed Mahameed.

20) Fix several device refcount leaks in network drivers, from Johan
    Hovold.

21) icmp6_send() should use skb dst device not skb->dev to determine L3
    routing domain. From David Ahern.

22) ip_vs_genl_family sets maxattr incorrectly, from WANG Cong.

23) We leak new macvlan port in some cases of maclan_common_netlink()
    errors. Fix from Gao Feng.

24) Similar to the icmp6_send() fix, icmp_route_lookup() should
    determine L3 routing domain using skb_dst(skb)->dev not skb->dev.
    Also from David Ahern.

25) Several fixes for route offloading and FIB notification handling in
    mlxsw driver, from Jiri Pirko.

26) Properly cap __skb_flow_dissect()'s return value, from Eric Dumazet.

27) Fix long standing regression in ipv4 redirect handling, wrt.
    validating the new neighbour's reachability. From Stephen Suryaputra
    Lin.

28) If sk_filter() trims the packet excessively, handle it reasonably in
    tcp input instead of exploding. From Eric Dumazet.

29) Fix handling of napi hash state when copying channels in sfc driver,
    from Bert Kenward.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (121 commits)
  mlxsw: spectrum_router: Flush FIB tables during fini
  net: stmmac: Fix lack of link transition for fixed PHYs
  sctp: change sk state only when it has assocs in sctp_shutdown
  bnx2: Wait for in-flight DMA to complete at probe stage
  Revert "bnx2: Reset device during driver initialization"
  ps3_gelic: fix spelling mistake in debug message
  net: ethernet: ixp4xx_eth: fix spelling mistake in debug message
  ibmvnic: Fix size of debugfs name buffer
  ibmvnic: Unmap ibmvnic_statistics structure
  sfc: clear napi_hash state when copying channels
  mlxsw: spectrum_router: Correctly dump neighbour activity
  mlxsw: spectrum: Fix refcount bug on span entries
  bnxt_en: Fix VF virtual link state.
  bnxt_en: Fix ring arithmetic in bnxt_setup_tc().
  Revert "include/uapi/linux/atm_zatm.h: include linux/time.h"
  tcp: take care of truncations done by sk_filter()
  ipv4: use new_gw for redirect neigh lookup
  r8152: Fix error path in open function
  net: bpqether.h: remove if_ether.h guard
  net: __skb_flow_dissect() must cap its return value
  ...

Pull arch/tile bugfix from Chris Metcalf:
 "This just fixes an incompatibility with tile __ro_after_init"

* 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  tile: handle __ro_after_init like parisc does

Pull RTC fixes from Alexandre Belloni:
 "Here are a few driver fixes for 4.9. It has been calm for a while so I
  don't expect more for this cycle.

  Drivers:
   - asm9260: fix module autoload
   - cmos: fix crashes
   - omap: fix clock handling"

* tag 'rtc-4.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  rtc: omap: prevent disabling of clock/module during suspend
  rtc: omap: Fix selecting external osc
  rtc: cmos: Don't enable interrupts in the middle of the interrupt handler
  rtc: cmos: remove all __exit_p annotations
  rtc: asm9260: fix module autoload

The tile architecture already marks RO_DATA as read-only in
the kernel, so grouping RO_AFTER_INIT_DATA with RO_DATA, as is
done by default, means the kernel faults in init when it tries
to write to RO_AFTER_INIT_DATA.  For now, just arrange that
__ro_after_init is handled like __write_once, i.e. __read_mostly.
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>

Since commit b45f64d1 ("mlxsw: spectrum_router: Use FIB notifications
instead of switchdev calls") we reflect to the device the entire FIB
table and not only FIBs that point to netdevs created by the driver.

During module removal, FIBs of the second type are removed following
NETDEV_UNREGISTER events sent. The other FIBs are still present in both
the driver's cache and the device's table.

Fix this by iterating over all the FIB tables in the device and flush
them. There's no need to take locks, as we're the only writer.

Fixes: b45f64d1 ("mlxsw: spectrum_router: Use FIB notifications instead of switchdev calls")
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>

While it is useful to know which MDIO driver is being registered, demote
the pr_info() to a pr_debug().
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 52f95bbf ("stmmac: fix adjust link call in case of a switch
is attached") added some logic to avoid polling the fixed PHY and
therefore invoking the adjust_link callback more than once, since this
is a fixed PHY and link events won't be generated.

This works fine the first time, because we start with phydev->irq =
PHY_POLL, so we call adjust_link, then we set phydev->irq =
PHY_IGNORE_INTERRUPT and we stop polling the PHY.

Now, if we called ndo_close(), which calls both phy_stop() and does an
explicit netif_carrier_off(), we end up with a link down. Upon calling
ndo_open() again, despite starting the PHY state machine, we have
PHY_IGNORE_INTERRUPT set, and we generate no link event at all, so the
link is permanently down.

Fixes: 52f95bbf ("stmmac: fix adjust link call in case of a switch is attached")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The return value of function macvlan_addr_busy is used as bool value,
so use bool value instead of integer number "1" and "0".
Signed-off-by: Gao Feng <gfree.wind@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace the custom u64_to_ptr() function with the u64_to_user_ptr()
macro.
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Now when users shutdown a sock with SEND_SHUTDOWN in sctp, even if
this sock has no connection (assoc), sk state would be changed to
SCTP_SS_CLOSING, which is not as we expect.

Besides, after that if users try to listen on this sock, kernel
could even panic when it dereference sctp_sk(sk)->bind_hash in
sctp_inet_listen, as bind_hash is null when sock has no assoc.

This patch is to move sk state change after checking sk assocs
is not empty, and also merge these two if() conditions and reduce
indent level.

Fixes: d46e416c ("sctp: sctp should change socket state when shutdown is received")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Baoquan He says:

====================
bnx2: Wait for in-flight DMA to complete at probe stage

This is v2 post.

In commit 3e1be7ad ("bnx2: Reset device during driver initialization"),
firmware requesting code was moved from open stage to probe stage.
The reason is in kdump kernel hardware iommu need device be reset in
driver probe stage, otherwise those in-flight DMA from 1st kernel
will continue going and look up into the newly created io-page tables.
However bnx2 chip resetting involves firmware requesting issue, that
need be done in open stage.

Michale Chan suggested we can just wait for the old in-flight DMA to
complete at probe stage, then though without device resetting, we
don't need to worry the old in-flight DMA could continue looking up
the newly created io-page tables.

v1->v2:
    Michael suggested to wait for the in-flight DMA to complete at probe
    stage. So give up the old method of trying to reset chip at probe
    stage, take the new way accordingly.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

In-flight DMA from 1st kernel could continue going in kdump kernel.
New io-page table has been created before bnx2 does reset at open stage.
We have to wait for the in-flight DMA to complete to avoid it look up
into the newly created io-page table at probe stage.
Suggested-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This reverts commit 3e1be7ad.

When people build bnx2 driver into kernel, it will fail to detect
and load firmware because firmware is contained in initramfs and
initramfs has not been uncompressed yet during do_initcalls. So
revert commit 3e1be7ad and work out a new way in the later patch.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Trivial fix to spelling mistake "unmached" to "unmatched" in
debug message.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ethtool api {get|set}_settings is deprecated.
We move this driver to new api {get|set}_link_ksettings.

The previous implementation of set_settings was modifying
the value of advertising, but with the new API, it's not
possible. The structure ethtool_link_ksettings is defined
as const.
Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ethtool api {get|set}_settings is deprecated.
We move this driver to new api {get|set}_link_ksettings.

The previous implementation of set_settings was modifying
the value of advertising, but with the new API, it's not
possible. The structure ethtool_link_ksettings is defined
as const.
Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ethtool api {get|set}_settings is deprecated.
We move this driver to new api {get|set}_link_ksettings.
Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ethtool api {get|set}_settings is deprecated.
We move this driver to new api {get|set}_link_ksettings.
Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Similar to commit 14135f30 ("inet: fix sleeping inside inet_wait_for_connect()"),
sk_wait_event() needs to fix too, because release_sock() is blocking,
it changes the process state back to running after sleep, which breaks
the previous prepare_to_wait().

Switch to the new wait API.

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In commit 022d00ee ("ASoC: lpass-platform: Fix broken pcm data
usage") the stream specific information initialization was broken, with
the dma channel information not being initialized if there was no
alloc_dma_channel() helper function.

Before that, the DMA channel number was implicitly initialized to zero
because the backing store was allocated with devm_kzalloc().  When the
init code was rewritten, that implicit initialization was lost, and gcc
rightfully complains about an uninitialized variable being used.

Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This reverts commit bfd8d3f2.

It turns out that this flushes things much too aggressiverly, and causes
lines to break up when the system logger races with new continuation
lines being printed.

There's a pending patch to make printk() flushing much more
straightforward, but it's too invasive for 4.9, so in the meantime let's
just not make the system message logging flush continuation lines.
They'll be flushed by the final newline anyway.
Suggested-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This file was converted to a separate module at commit 7a0786c1
("gp8psk: Fix DVB frontend attach"), because the DVB attach routines
require it to work.  However, I forgot to copy the MODULE_foo() macros
from the original module, causing this warning:

    WARNING: modpost: missing MODULE_LICENSE() in drivers/media/dvb-frontends/gp8psk-fe.o
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 7a0786c1 ("gp8psk: Fix DVB frontend attach")
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull x86 fixes from Ingo Molnar:
 "Misc fixes:

   - fix an Intel/MID boot crash/hang bug

   - fix a cache topology mis-parsing bug on certain AMD CPUs

   - fix a virtualization firmware bug by adding a check+quirk
     workaround on the kernel side"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu: Deal with broken firmware (VMWare/XEN)
  x86/cpu/AMD: Fix cpu_llc_id for AMD Fam17h systems
  x86/platform/intel-mid: Retrofit pci_platform_pm_ops ->get_state hook

Pull irq fix from Ingo Molnar:
 "This fixes a genirq regression that resulted in the Intel/Broxton
  pinctrl/GPIO driver (and possibly others) spewing warnings"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Use irq type from irqdata instead of irqdesc

Pull perf fixes from Ingo Molnar:
 "An uncore PMU driver hardware enablement change for Intel SkyLake
  uncore PMUs (Skylake Y, U, H and S platforms), plus a number of
  tooling fixes for the histogram handling/displaying code"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/uncore: Add more Intel uncore IMC PCI IDs for SkyLake
  perf hists: Fix column length on --hierarchy
  perf hists browser: Fix column indentation on --hierarchy
  perf hists browser: Show folded sign properly on --hierarchy
  perf hists browser: Fix indentation of folded sign on --hierarchy
  perf hist browser: Fix hierarchy column counts

Pull EFI fixes from Ingo Molnar:
 "A boot crash fix and a build warning fix"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/efi: Prevent mixed mode boot corruption with CONFIG_VMAP_STACK=y
  x86/efi: Fix EFI memmap pointer size warning

Pull NTB fixes from Jon Mason:
 "NTB bug fixes for ntb_hw_intel, ntb_perf, and ntb_pingpong.

  Also, a fixup to use jiffies in schedule_timeout_* call instead of a
  constant"

* tag 'ntb-4.9' of git://github.com/jonmason/ntb:
  ntb_perf: potential info leak in debugfs
  ntb: ntb_hw_intel: init peer_addr in struct intel_ntb_dev
  ntb: make DMA_OUT_RESOURCE_TO HZ independent
  ntb_transport: make DMA_OUT_RESOURCE_TO HZ independent
  NTB: ntb_hw_intel: Fix typo in module parameter descriptions
  ntb_pingpong: Fix db_init parameter description

Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following patchset contains a second batch of Netfilter updates for
your net-next tree. This includes a rework of the core hook
infrastructure that improves Netfilter performance by ~15% according to
synthetic benchmarks. Then, a large batch with ipset updates, including
a new hash:ipmac set type, via Jozsef Kadlecsik. This also includes a
couple of assorted updates.

Regarding the core hook infrastructure rework to improve performance,
using this simple drop-all packets ruleset from ingress:

        nft add table netdev x
        nft add chain netdev x y { type filter hook ingress device eth0 priority 0\; }
        nft add rule netdev x y drop

And generating traffic through Jesper Brouer's
samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh script using -i
option. perf report shows nf_tables calls in its top 10:

    17.30%  kpktgend_0   [nf_tables]            [k] nft_do_chain
    15.75%  kpktgend_0   [kernel.vmlinux]       [k] __netif_receive_skb_core
    10.39%  kpktgend_0   [nf_tables_netdev]     [k] nft_do_chain_netdev

I'm measuring here an improvement of ~15% in performance with this
patchset, so we got +2.5Mpps more. I have used my old laptop Intel(R)
Core(TM) i5-3320M CPU @ 2.60GHz 4-cores.

This rework contains more specifically, in strict order, these patches:

1) Remove compile-time debugging from core.

2) Remove obsolete comments that predate the rcu era. These days it is
   well known that a Netfilter hook always runs under rcu_read_lock().

3) Remove threshold handling, this is only used by br_netfilter too.
   We already have specific code to handle this from br_netfilter,
   so remove this code from the core path.

4) Deprecate NF_STOP, as this is only used by br_netfilter.

5) Place nf_state_hook pointer into xt_action_param structure, so
   this structure fits into one single cacheline according to pahole.
   This also implicit affects nftables since it also relies on the
   xt_action_param structure.

6) Move state->hook_entries into nf_queue entry. The hook_entries
   pointer is only required by nf_queue(), so we can store this in the
   queue entry instead.

7) use switch() statement to handle verdict cases.

8) Remove hook_entries field from nf_hook_state structure, this is only
   required by nf_queue, so store it in nf_queue_entry structure.

9) Merge nf_iterate() into nf_hook_slow() that results in a much more
   simple and readable function.

10) Handle NF_REPEAT away from the core, so far the only client is
    nf_conntrack_in() and we can restart the packet processing using a
    simple goto to jump back there when the TCP requires it.
    This update required a second pass to fix fallout, fix from
    Arnd Bergmann.

11) Set random seed from nft_hash when no seed is specified from
    userspace.

12) Simplify nf_tables expression registration, in a much smarter way
    to save lots of boiler plate code, by Liping Zhang.

13) Simplify layer 4 protocol conntrack tracker registration, from
    Davide Caratti.

14) Missing CONFIG_NF_SOCKET_IPV4 dependency for udp4_lib_lookup, due
    to recent generalization of the socket infrastructure, from Arnd
    Bergmann.

15) Then, the ipset batch from Jozsef, he describes it as it follows:

* Cleanup: Remove extra whitespaces in ip_set.h
* Cleanup: Mark some of the helpers arguments as const in ip_set.h
* Cleanup: Group counter helper functions together in ip_set.h
* struct ip_set_skbinfo is introduced instead of open coded fields
  in skbinfo get/init helper funcions.
* Use kmalloc() in comment extension helper instead of kzalloc()
  because it is unnecessary to zero out the area just before
  explicit initialization.
* Cleanup: Split extensions into separate files.
* Cleanup: Separate memsize calculation code into dedicated function.
* Cleanup: group ip_set_put_extensions() and ip_set_get_extensions()
  together.
* Add element count to hash headers by Eric B Munson.
* Add element count to all set types header for uniform output
  across all set types.
* Count non-static extension memory into memsize calculation for
  userspace.
* Cleanup: Remove redundant mtype_expire() arguments, because
  they can be get from other parameters.
* Cleanup: Simplify mtype_expire() for hash types by removing
  one level of intendation.
* Make NLEN compile time constant for hash types.
* Make sure element data size is a multiple of u32 for the hash set
  types.
* Optimize hash creation routine, exit as early as possible.
* Make struct htype per ipset family so nets array becomes fixed size
  and thus simplifies the struct htype allocation.
* Collapse same condition body into a single one.
* Fix reported memory size for hash:* types, base hash bucket structure
  was not taken into account.
* hash:ipmac type support added to ipset by Tomasz Chilinski.
* Use setup_timer() and mod_timer() instead of init_timer()
  by Muhammad Falak R Wani, individually for the set type families.

16) Remove useless connlabel field in struct netns_ct, patch from
    Florian Westphal.

17) xt_find_table_lock() doesn't return ERR_PTR() anymore, so simplify
    {ip,ip6,arp}tables code that uses this.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a warning that the abort mechanism was triggered for device.
Also avoid going through the procedure if abort was already done.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Andrew Lunn says:

====================
dsa: mv88e6xxx: Fixes for port refactoring

The patches which refactored setting up the switch MACs introduced a
couple of regressions. The RGMII delays for a port can be set using
other mechanism than just phy-mode. Don't overwrite the delays unless
explicitly asked to. This broke my Armada 370 RD. Also, the mv88e6351
family supports setting RGMII delays, but is missing the necessary
entries in the ops structures to allow this.

These fixes are to patches currently in net-next. No need for stable
etc.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The recent refactoring of setting the MAC configuration broke setting
of RGMII delays, via the phy-mode, on the 6351 family. Add the missing
ops to the structure.

Fixes: 7340e5ecdbb1 ("net: dsa: mv88e6xxx: setup port's MAC")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

The RGMII modes delays can be set via strapping pings or EEPROM.
Don't change them unless explicitly asked to change them.  The recent
refactoring of setting the MAC configuration changed this behaviours,
in that CPU and DSA ports have any pre-configured RGMII delays
removed. This breaks the Armada 370RD board. Restore the previous
behaviour, in that RGMII delays are only applied/removed when
explicitly asked for via an phy-mode being PHY_INTERFACE_MODE_RGMII*

Fixes: 7340e5ecdbb1 ("net: dsa: mv88e6xxx: setup port's MAC")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

This is a static checker warning, not something I'm desperately
concerned about.  But snprintf() returns the number of bytes that
would have been copied if there were space.  We really care about the
number of bytes that actually were copied so we should use scnprintf()
instead.

It probably won't overrun, and in that case we may as well just use
sprintf() but these sorts of things make static checkers and code
reviewers happier.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

The peer_addr member of intel_ntb_dev is not set, therefore when
acquiring ntb_peer_db and ntb_peer_spad we only get the offset rather
than the actual physical address. Adding fix to correct that.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

schedule_timeout_* takes a timeout in jiffies but the code currently is
passing in a constant which makes this timeout HZ dependent, so pass it
through msecs_to_jiffies() to fix this up.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

schedule_timeout_* takes a timeout in jiffies but the code currently is
passing in a constant which makes this timeout HZ dependent, so pass it
through msecs_to_jiffies() to fix this up.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Jon Mason <jdmason@kudzu.us>