openwrt/staging/blogic.git
7 years agobpf: sockmap with sk redirect support
John Fastabend [Wed, 16 Aug 2017 05:32:47 +0000 (22:32 -0700)]
bpf: sockmap with sk redirect support

Recently we added a new map type called dev map used to forward XDP
packets between ports (6093ec2dc313). This patches introduces a
similar notion for sockets.

A sockmap allows users to add participating sockets to a map. When
sockets are added to the map enough context is stored with the
map entry to use the entry with a new helper

  bpf_sk_redirect_map(map, key, flags)

This helper (analogous to bpf_redirect_map in XDP) is given the map
and an entry in the map. When called from a sockmap program, discussed
below, the skb will be sent on the socket using skb_send_sock().

With the above we need a bpf program to call the helper from that will
then implement the send logic. The initial site implemented in this
series is the recv_sock hook. For this to work we implemented a map
attach command to add attributes to a map. In sockmap we add two
programs a parse program and a verdict program. The parse program
uses strparser to build messages and pass them to the verdict program.
The parse programs use the normal strparser semantics. The verdict
program is of type SK_SKB.

The verdict program returns a verdict SK_DROP, or  SK_REDIRECT for
now. Additional actions may be added later. When SK_REDIRECT is
returned, expected when bpf program uses bpf_sk_redirect_map(), the
sockmap logic will consult per cpu variables set by the helper routine
and pull the sock entry out of the sock map. This pattern follows the
existing redirect logic in cls and xdp programs.

This gives the flow,

 recv_sock -> str_parser (parse_prog) -> verdict_prog -> skb_send_sock
                                                     \
                                                      -> kfree_skb

As an example use case a message based load balancer may use specific
logic in the verdict program to select the sock to send on.

Sample programs are provided in future patches that hopefully illustrate
the user interfaces. Also selftests are in follow-on patches.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: export bpf_prog_inc_not_zero
John Fastabend [Wed, 16 Aug 2017 05:32:22 +0000 (22:32 -0700)]
bpf: export bpf_prog_inc_not_zero

bpf_prog_inc_not_zero will be used by upcoming sockmap patches this
patch simply exports it so we can pull it in.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: introduce new program type for skbs on sockets
John Fastabend [Wed, 16 Aug 2017 05:31:58 +0000 (22:31 -0700)]
bpf: introduce new program type for skbs on sockets

A class of programs, run from strparser and soon from a new map type
called sock map, are used with skb as the context but on established
sockets. By creating a specific program type for these we can use
bpf helpers that expect full sockets and get the verifier to ensure
these helpers are not used out of context.

The new type is BPF_PROG_TYPE_SK_SKB. This patch introduces the
infrastructure and type.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: fixes for skb_send_sock
John Fastabend [Wed, 16 Aug 2017 05:31:34 +0000 (22:31 -0700)]
net: fixes for skb_send_sock

A couple fixes to new skb_send_sock infrastructure. However, no users
currently exist for this code (adding user in next handful of patches)
so it should not be possible to trigger a panic with existing in-kernel
code.

Fixes: 306b13eb3cf9 ("proto_ops: Add locked held versions of sendmsg and sendpage")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: add sendmsg_locked and sendpage_locked to af_inet6
John Fastabend [Wed, 16 Aug 2017 05:31:10 +0000 (22:31 -0700)]
net: add sendmsg_locked and sendpage_locked to af_inet6

To complete the sendmsg_locked and sendpage_locked implementation add
the hooks for af_inet6 as well.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: early init support for strparser
John Fastabend [Wed, 16 Aug 2017 05:30:47 +0000 (22:30 -0700)]
net: early init support for strparser

It is useful to allow strparser to init sockets before the read_sock
callback has been established.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: 3c509: constify pnp_device_id
Arvind Yadav [Wed, 16 Aug 2017 04:55:59 +0000 (10:25 +0530)]
net: 3c509: constify pnp_device_id

pnp_device_id are not supposed to change at runtime. All functions
working with pnp_device_id provided by <linux/pnp.h> work with
const pnp_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: update VF's netdev->max_mtu if there's a change in PF's MTU
Veerasenareddy Burru [Tue, 15 Aug 2017 23:26:22 +0000 (16:26 -0700)]
liquidio: update VF's netdev->max_mtu if there's a change in PF's MTU

A VF's MTU is capped at the parent PF's MTU.  So if there's a change in the
PF's MTU, then update the VF's netdev->max_mtu.

Also remove duplicate log messages for MTU change.

Signed-off-by: Veerasenareddy Burru <veerasenareddy.burru@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'net-sizeof-cleanups'
David S. Miller [Wed, 16 Aug 2017 18:01:58 +0000 (11:01 -0700)]
Merge branch 'net-sizeof-cleanups'

Stephen Hemminger says:

====================
net: various sizeof cleanups

Noticed some places that were using sizeof as an operator.
This is legal C but is not the convention used in the kernel.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlx4: sizeof style usage
stephen hemminger [Tue, 15 Aug 2017 17:29:19 +0000 (10:29 -0700)]
mlx4: sizeof style usage

The kernel coding style is to treat sizeof as a function
(ie. with parenthesis) not as an operator.

Also use kcalloc and kmalloc_array

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoskge: add paren around sizeof arg
stephen hemminger [Tue, 15 Aug 2017 17:29:18 +0000 (10:29 -0700)]
skge: add paren around sizeof arg

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agovirtio: put paren around sizeof
stephen hemminger [Tue, 15 Aug 2017 17:29:17 +0000 (10:29 -0700)]
virtio: put paren around sizeof

Kernel coding style is to put paren around operand of sizeof.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotun/tap: use paren's with sizeof
stephen hemminger [Tue, 15 Aug 2017 17:29:16 +0000 (10:29 -0700)]
tun/tap: use paren's with sizeof

Although sizeof is an operator in C. The kernel coding style convention
is to always use it like a function and add parenthesis.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched/hfsc: opencode trivial set_active() and set_passive()
Konstantin Khlebnikov [Tue, 15 Aug 2017 13:40:03 +0000 (16:40 +0300)]
net_sched/hfsc: opencode trivial set_active() and set_passive()

Any move comment abount update_vf() into right place.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: call qlen_notify only if child qdisc is empty
Konstantin Khlebnikov [Tue, 15 Aug 2017 13:39:59 +0000 (16:39 +0300)]
net_sched: call qlen_notify only if child qdisc is empty

This callback is used for deactivating class in parent qdisc.
This is cheaper to test queue length right here.

Also this allows to catch draining screwed backlog and prevent
second deactivation of already inactive parent class which will
crash kernel for sure. Kernel with print warning at destruction
of child qdisc where no packets but backlog is not zero.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'liquidio-adding-support-for-ethtool-set-channels-feature'
David S. Miller [Wed, 16 Aug 2017 04:05:31 +0000 (21:05 -0700)]
Merge branch 'liquidio-adding-support-for-ethtool-set-channels-feature'

Intiyaz Basha says:

====================
liquidio: adding support for ethtool --set-channels feature

Code reorganization is required for adding ethtool --set-channels feature.
First three patches are for code reorganization.  The last patch is for
adding this feature.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: added support for ethtool --set-channels feature
Intiyaz Basha [Tue, 15 Aug 2017 19:46:18 +0000 (12:46 -0700)]
liquidio: added support for ethtool --set-channels feature

adding support for ethtool --set-channels feature

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved octeon_setup_interrupt to lio_core.c
Intiyaz Basha [Tue, 15 Aug 2017 19:46:15 +0000 (12:46 -0700)]
liquidio: moved octeon_setup_interrupt to lio_core.c

Moving common octeon_setup_interrupt to lio_core.c

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved liquidio_legacy_intr_handler to lio_core.c
Intiyaz Basha [Tue, 15 Aug 2017 19:46:11 +0000 (12:46 -0700)]
liquidio: moved liquidio_legacy_intr_handler to lio_core.c

Moving liquidio_legacy_intr_handler to lio_core.c

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved liquidio_msix_intr_handler to lio_core.c
Intiyaz Basha [Tue, 15 Aug 2017 19:46:05 +0000 (12:46 -0700)]
liquidio: moved liquidio_msix_intr_handler to lio_core.c

Moving common liquidio_msix_intr_handler to lio_core.c

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
David S. Miller [Wed, 16 Aug 2017 03:23:23 +0000 (20:23 -0700)]
Merge git://git./linux/kernel/git/davem/net

7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Wed, 16 Aug 2017 01:52:28 +0000 (18:52 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix TCP checksum offload handling in iwlwifi driver, from Emmanuel
    Grumbach.

 2) In ksz DSA tagging code, free SKB if skb_put_padto() fails. From
    Vivien Didelot.

 3) Fix two regressions with bonding on wireless, from Andreas Born.

 4) Fix build when busypoll is disabled, from Daniel Borkmann.

 5) Fix copy_linear_skb() wrt. SO_PEEK_OFF, from Eric Dumazet.

 6) Set SKB cached route properly in inet_rtm_getroute(), from Florian
    Westphal.

 7) Fix PCI-E relaxed ordering handling in cxgb4 driver, from Ding
    Tianhong.

 8) Fix module refcnt leak in ULP code, from Sabrina Dubroca.

 9) Fix use of GFP_KERNEL in atomic contexts in AF_KEY code, from Eric
    Dumazet.

10) Need to purge socket write queue in dccp_destroy_sock(), also from
    Eric Dumazet.

11) Make bpf_trace_printk() work properly on 32-bit architectures, from
    Daniel Borkmann.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (47 commits)
  bpf: fix bpf_trace_printk on 32 bit archs
  PCI: fix oops when try to find Root Port for a PCI device
  sfc: don't try and read ef10 data on non-ef10 NIC
  net_sched: remove warning from qdisc_hash_add
  net_sched/sfq: update hierarchical backlog when drop packet
  net_sched: reset pointers to tcf blocks in classful qdiscs' destructors
  ipv4: fix NULL dereference in free_fib_info_rcu()
  net: Fix a typo in comment about sock flags.
  ipv6: fix NULL dereference in ip6_route_dev_notify()
  tcp: fix possible deadlock in TCP stack vs BPF filter
  dccp: purge write queue in dccp_destroy_sock()
  udp: fix linear skb reception with PEEK_OFF
  ipv6: release rt6->rt6i_idev properly during ifdown
  af_key: do not use GFP_KERNEL in atomic contexts
  tcp: ulp: avoid module refcnt leak in tcp_set_ulp
  net/cxgb4vf: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag
  net/cxgb4: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag
  PCI: Disable Relaxed Ordering Attributes for AMD A1100
  PCI: Disable Relaxed Ordering for some Intel processors
  PCI: Disable PCIe Relaxed Ordering if unsupported
  ...

7 years agobpf: fix bpf_trace_printk on 32 bit archs
Daniel Borkmann [Tue, 15 Aug 2017 23:45:33 +0000 (01:45 +0200)]
bpf: fix bpf_trace_printk on 32 bit archs

James reported that on MIPS32 bpf_trace_printk() is currently
broken while MIPS64 works fine:

  bpf_trace_printk() uses conditional operators to attempt to
  pass different types to __trace_printk() depending on the
  format operators. This doesn't work as intended on 32-bit
  architectures where u32 and long are passed differently to
  u64, since the result of C conditional operators follows the
  "usual arithmetic conversions" rules, such that the values
  passed to __trace_printk() will always be u64 [causing issues
  later in the va_list handling for vscnprintf()].

  For example the samples/bpf/tracex5 test printed lines like
  below on MIPS32, where the fd and buf have come from the u64
  fd argument, and the size from the buf argument:

    [...] 1180.941542: 0x00000001: write(fd=1, buf=  (null), size=6258688)

  Instead of this:

    [...] 1625.616026: 0x00000001: write(fd=1, buf=009e4000, size=512)

One way to get it working is to expand various combinations
of argument types into 8 different combinations for 32 bit
and 64 bit kernels. Fix tested by James on MIPS32 and MIPS64
as well that it resolves the issue.

Fixes: 9c959c863f82 ("tracing: Allow BPF programs to call bpf_trace_printk()")
Reported-by: James Hogan <james.hogan@imgtec.com>
Tested-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoPCI: fix oops when try to find Root Port for a PCI device
dingtianhong [Tue, 15 Aug 2017 15:24:48 +0000 (23:24 +0800)]
PCI: fix oops when try to find Root Port for a PCI device

Eric report a oops when booting the system after applying
the commit a99b646afa8a ("PCI: Disable PCIe Relaxed..."):

[    4.241029] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050
[    4.247001] IP: pci_find_pcie_root_port+0x62/0x80
[    4.253011] PGD 0
[    4.253011] P4D 0
[    4.253011]
[    4.258013] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
[    4.262015] Modules linked in:
[    4.265005] CPU: 31 PID: 1 Comm: swapper/0 Not tainted 4.13.0-dbx-DEV #316
[    4.271002] Hardware name: Intel RML,PCH/Iota_QC_19, BIOS 2.40.0 06/22/2016
[    4.279002] task: ffffa2ee38cfa040 task.stack: ffffa51ec0004000
[    4.285001] RIP: 0010:pci_find_pcie_root_port+0x62/0x80
[    4.290012] RSP: 0000:ffffa51ec0007ab8 EFLAGS: 00010246
[    4.295003] RAX: 0000000000000000 RBX: ffffa2ee36bae000 RCX: 0000000000000006
[    4.303002] RDX: 000000000000081c RSI: ffffa2ee38cfa8c8 RDI: ffffa2ee36bae000
[    4.310013] RBP: ffffa51ec0007b58 R08: 0000000000000001 R09: 0000000000000000
[    4.317001] R10: 0000000000000000 R11: 0000000000000000 R12: ffffa51ec0007ad0
[    4.324005] R13: ffffa2ee36bae098 R14: 0000000000000002 R15: ffffa2ee37204818
[    4.331002] FS:  0000000000000000(0000) GS:ffffa2ee3fcc0000(0000) knlGS:0000000000000000
[    4.339002] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.345001] CR2: 0000000000000050 CR3: 000000401000f000 CR4: 00000000001406e0
[    4.351002] Call Trace:
[    4.354012]  ? pci_configure_device+0x19f/0x570
[    4.359002]  ? pci_conf1_read+0xb8/0xf0
[    4.363002]  ? raw_pci_read+0x23/0x40
[    4.366011]  ? pci_read+0x2c/0x30
[    4.370014]  ? pci_read_config_word+0x67/0x70
[    4.374012]  pci_device_add+0x28/0x230
[    4.378012]  ? pci_vpd_f0_read+0x50/0x80
[    4.382014]  pci_scan_single_device+0x96/0xc0
[    4.386012]  pci_scan_slot+0x79/0xf0
[    4.389001]  pci_scan_child_bus+0x31/0x180
[    4.394014]  acpi_pci_root_create+0x1c6/0x240
[    4.398013]  pci_acpi_scan_root+0x15f/0x1b0
[    4.402012]  acpi_pci_root_add+0x2e6/0x400
[    4.406012]  ? acpi_evaluate_integer+0x37/0x60
[    4.411002]  acpi_bus_attach+0xdf/0x200
[    4.415002]  acpi_bus_attach+0x6a/0x200
[    4.418014]  acpi_bus_attach+0x6a/0x200
[    4.422013]  acpi_bus_scan+0x38/0x70
[    4.426011]  acpi_scan_init+0x10c/0x271
[    4.429001]  acpi_init+0x2fa/0x348
[    4.433004]  ? acpi_sleep_proc_init+0x2d/0x2d
[    4.437001]  do_one_initcall+0x43/0x169
[    4.441001]  kernel_init_freeable+0x1d0/0x258
[    4.445003]  ? rest_init+0xe0/0xe0
[    4.449001]  kernel_init+0xe/0x150

====================== cut here =============================

It looks like the pci_find_pcie_root_port() was trying to
find the Root Port for the PCI device which is the Root
Port already, it will return NULL and trigger the problem,
so check the highest_pcie_bridge to fix thie problem.

Fixes: a99b646afa8a ("PCI: Disable PCIe Relaxed Ordering if unsupported")
Fixes: c56d4450eb68 ("PCI: Turn off Request Attributes to avoid Chelsio T5 Completion erratum")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agodt-bindings: net: ravb : Add support for r8a7745 SoC
Biju Das [Tue, 15 Aug 2017 14:40:20 +0000 (15:40 +0100)]
dt-bindings: net: ravb : Add support for r8a7745 SoC

Add a new compatible string for the RZ/G1E (R8A7745) SoC.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'getroute-no-rtnl'
David S. Miller [Wed, 16 Aug 2017 00:20:55 +0000 (17:20 -0700)]
Merge branch 'getroute-no-rtnl'

Florian Westphal says:

====================
ipv4 getroute doesn't assume rtnl lock is held anymore, also make
this true for ipv6, then switch both to DOIT_UNLOCKED.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv4: route: set ipv4 RTM_GETROUTE to not use rtnl
Florian Westphal [Tue, 15 Aug 2017 14:34:44 +0000 (16:34 +0200)]
ipv4: route: set ipv4 RTM_GETROUTE to not use rtnl

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv6: route: set ipv6 RTM_GETROUTE to not use rtnl
Florian Westphal [Tue, 15 Aug 2017 14:34:43 +0000 (16:34 +0200)]
ipv6: route: set ipv6 RTM_GETROUTE to not use rtnl

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv6: route: make rtm_getroute not assume rtnl is locked
Florian Westphal [Tue, 15 Aug 2017 14:34:42 +0000 (16:34 +0200)]
ipv6: route: make rtm_getroute not assume rtnl is locked

__dev_get_by_index assumes RTNL is held, use _rcu version instead.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoselftests: add 'ip get' to rtnetlink.sh
Florian Westphal [Tue, 15 Aug 2017 14:34:41 +0000 (16:34 +0200)]
selftests: add 'ip get' to rtnetlink.sh

exercise ip/ip6 RTM_GETROUTE doit() callpath.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosfc: don't try and read ef10 data on non-ef10 NIC
Bert Kenward [Tue, 15 Aug 2017 13:55:32 +0000 (14:55 +0100)]
sfc: don't try and read ef10 data on non-ef10 NIC

The MAC stats command takes a port ID, which doesn't exist on
pre-ef10 NICs (5000- and 6000- series). This is extracted from the
NIC specific data; we misinterpret this as the ef10 data structure,
causing us to read potentially unallocated data. With a KASAN kernel
this can cause errors with:
   BUG: KASAN: slab-out-of-bounds in efx_mcdi_mac_stats

Fixes: 0a2ab4d988d7 ("sfc: set the port-id when calling MC_CMD_MAC_STATS")
Reported-by: Stefano Brivio <sbrivio@redhat.com>
Tested-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agodsa: fix flow disector null pointer
Craig Gallek [Tue, 15 Aug 2017 13:43:40 +0000 (09:43 -0400)]
dsa: fix flow disector null pointer

A recent change to fix up DSA device behavior made the assumption that
all skbs passing through the flow disector will be associated with a
device. This does not appear to be a safe assumption.  Syzkaller found
the crash below by attaching a BPF socket filter that tries to find the
payload offset of a packet passing between two unix sockets.

kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 2940 Comm: syzkaller872007 Not tainted 4.13.0-rc4-next-20170811 #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d1b425c0 task.stack: ffff8801d0bc0000
RIP: 0010:__skb_flow_dissect+0xdcd/0x3ae0 net/core/flow_dissector.c:445
RSP: 0018:ffff8801d0bc7340 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000060 RSI: ffffffff856dc080 RDI: 0000000000000300
RBP: ffff8801d0bc7870 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: ffffed003a178f1e R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff856dc080 R15: ffff8801ce223140
FS:  00000000016ed880(0000) GS:ffff8801dc000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020008000 CR3: 00000001ce22d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_flow_dissect_flow_keys include/linux/skbuff.h:1176 [inline]
 skb_get_poff+0x9a/0x1a0 net/core/flow_dissector.c:1079
 ______skb_get_pay_offset net/core/filter.c:114 [inline]
 __skb_get_pay_offset+0x15/0x20 net/core/filter.c:112
Code: 80 3c 02 00 44 89 6d 10 0f 85 44 2b 00 00 4d 8b 67 20 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 00 03 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 13 2b 00 00 4d 8b a4 24 00 03 00 00 4d 85 e4
RIP: __skb_flow_dissect+0xdcd/0x3ae0 net/core/flow_dissector.c:445 RSP: ffff8801d0bc7340

Fixes: 43e665287f93 ("net-next: dsa: fix flow dissection")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Craig Gallek <kraig@google.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: remove warning from qdisc_hash_add
Konstantin Khlebnikov [Tue, 15 Aug 2017 13:39:05 +0000 (16:39 +0300)]
net_sched: remove warning from qdisc_hash_add

It was added in commit e57a784d8cae ("pkt_sched: set root qdisc
before change() in attach_default_qdiscs()") to hide duplicates
from "tc qdisc show" for incative deivices.

After 59cc1f61f ("net: sched: convert qdisc linked list to hashtable")
it triggered when classful qdisc is added to inactive device because
default qdiscs are added before switching root qdisc.

Anyway after commit ea3274695353 ("net: sched: avoid duplicates in
qdisc dump") duplicates are filtered right in dumper.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched/sfq: update hierarchical backlog when drop packet
Konstantin Khlebnikov [Tue, 15 Aug 2017 13:37:04 +0000 (16:37 +0300)]
net_sched/sfq: update hierarchical backlog when drop packet

When sfq_enqueue() drops head packet or packet from another queue it
have to update backlog at upper qdiscs too.

Fixes: 2ccccf5fb43f ("net_sched: update hierarchical backlog too")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: reset pointers to tcf blocks in classful qdiscs' destructors
Konstantin Khlebnikov [Tue, 15 Aug 2017 13:35:21 +0000 (16:35 +0300)]
net_sched: reset pointers to tcf blocks in classful qdiscs' destructors

Traffic filters could keep direct pointers to classes in classful qdisc,
thus qdisc destruction first removes all filters before freeing classes.
Class destruction methods also tries to free attached filters but now
this isn't safe because tcf_block_put() unlike to tcf_destroy_chain()
cannot be called second time.

This patch set class->block to NULL after first tcf_block_put() and
turn second call into no-op.

Fixes: 6529eaba33f0 ("net: sched: introduce tcf block infractructure")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv4: fix NULL dereference in free_fib_info_rcu()
Eric Dumazet [Tue, 15 Aug 2017 12:26:17 +0000 (05:26 -0700)]
ipv4: fix NULL dereference in free_fib_info_rcu()

If fi->fib_metrics could not be allocated in fib_create_info()
we attempt to dereference a NULL pointer in free_fib_info_rcu() :

    m = fi->fib_metrics;
    if (m != &dst_default_metrics && atomic_dec_and_test(&m->refcnt))
            kfree(m);

Before my recent patch, we used to call kfree(NULL) and nothing wrong
happened.

Instead of using RCU to defer freeing while we are under memory stress,
it seems better to take immediate action.

This was reported by syzkaller team.

Fixes: 3fb07daff8e9 ("ipv4: add reference counting to metrics")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: Fix a typo in comment about sock flags.
Tonghao Zhang [Tue, 15 Aug 2017 11:28:54 +0000 (04:28 -0700)]
net: Fix a typo in comment about sock flags.

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv6: fix NULL dereference in ip6_route_dev_notify()
Eric Dumazet [Tue, 15 Aug 2017 11:09:51 +0000 (04:09 -0700)]
ipv6: fix NULL dereference in ip6_route_dev_notify()

Based on a syzkaller report [1], I found that a per cpu allocation
failure in snmp6_alloc_dev() would then lead to NULL dereference in
ip6_route_dev_notify().

It seems this is a very old bug, thus no Fixes tag in this submission.

Let's add in6_dev_put_clear() helper, as we will probably use
it elsewhere (once available/present in net-next)

[1]
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 17294 Comm: syz-executor6 Not tainted 4.13.0-rc2+ #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88019f456680 task.stack: ffff8801c6e58000
RIP: 0010:__read_once_size include/linux/compiler.h:250 [inline]
RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:refcount_sub_and_test+0x7d/0x1b0 lib/refcount.c:178
RSP: 0018:ffff8801c6e5f1b0 EFLAGS: 00010202
RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc90005d25000
RDX: ffff8801c6e5f218 RSI: ffffffff82342bbf RDI: 0000000000000001
RBP: ffff8801c6e5f240 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10038dcbe37
R13: 0000000000000006 R14: 0000000000000001 R15: 00000000000001b8
FS:  00007f21e0429700(0000) GS:ffff8801dc100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001ddbc22000 CR3: 00000001d632b000 CR4: 00000000001426e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 refcount_dec_and_test+0x1a/0x20 lib/refcount.c:211
 in6_dev_put include/net/addrconf.h:335 [inline]
 ip6_route_dev_notify+0x1c9/0x4a0 net/ipv6/route.c:3732
 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x51/0x90 net/core/dev.c:1678
 call_netdevice_notifiers net/core/dev.c:1694 [inline]
 rollback_registered_many+0x91c/0xe80 net/core/dev.c:7107
 rollback_registered+0x1be/0x3c0 net/core/dev.c:7149
 register_netdevice+0xbcd/0xee0 net/core/dev.c:7587
 register_netdev+0x1a/0x30 net/core/dev.c:7669
 loopback_net_init+0x76/0x160 drivers/net/loopback.c:214
 ops_init+0x10a/0x570 net/core/net_namespace.c:118
 setup_net+0x313/0x710 net/core/net_namespace.c:294
 copy_net_ns+0x27c/0x580 net/core/net_namespace.c:418
 create_new_namespaces+0x425/0x880 kernel/nsproxy.c:107
 unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:206
 SYSC_unshare kernel/fork.c:2347 [inline]
 SyS_unshare+0x653/0xfa0 kernel/fork.c:2297
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x4512c9
RSP: 002b:00007f21e0428c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000718150 RCX: 00000000004512c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000062020200
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b973d
R13: 00000000ffffffff R14: 000000002001d000 R15: 00000000000002dd
Code: 50 2b 34 82 c7 00 f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 c7 40 08 f3 f3
f3 f3 e8 a1 43 39 ff 4c 89 f8 48 8b 95 70 ff ff ff 48 c1 e8 03 <0f> b6
0c 18 4c 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85
RIP: __read_once_size include/linux/compiler.h:250 [inline] RSP:
ffff8801c6e5f1b0
RIP: atomic_read arch/x86/include/asm/atomic.h:26 [inline] RSP:
ffff8801c6e5f1b0
RIP: refcount_sub_and_test+0x7d/0x1b0 lib/refcount.c:178 RSP:
ffff8801c6e5f1b0
---[ end trace e441d046c6410d31 ]---

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_router: Use correct config option
Ido Schimmel [Tue, 15 Aug 2017 07:10:33 +0000 (09:10 +0200)]
mlxsw: spectrum_router: Use correct config option

I made an embarrassing mistake and used 'IPV6' instead of 'CONFIG_IPV6'
around the function that updates the kernel about IPv6 neighbours
activity. This can be a problem if the kernel has more neighbours than a
certain threshold and it starts deleting those that are supposedly
inactive.

Fixes: b5f3e0d43012 ("mlxsw: spectrum_router: Fix build when IPv6 isn't enabled")
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>
7 years agoipv6: fib: Provide offload indication using nexthop flags
Ido Schimmel [Tue, 15 Aug 2017 07:09:49 +0000 (09:09 +0200)]
ipv6: fib: Provide offload indication using nexthop flags

IPv6 routes currently lack nexthop flags as in IPv4. This has several
implications.

In the forwarding path, it requires us to check the carrier state of the
nexthop device and potentially ignore a linkdown route, instead of
checking for RTNH_F_LINKDOWN.

It also requires capable drivers to use the user facing IPv6-specific
route flags to provide offload indication, instead of using the nexthop
flags as in IPv4.

Add nexthop flags to IPv6 routes in the 40 bytes hole and use it to
provide offload indication instead of the RTF_OFFLOAD flag, which is
removed while it's still not part of any official kernel release.

In the near future we would like to use the field for the
RTNH_F_{LINKDOWN,DEAD} flags, but this change is more involved and might
not be ready in time for the current cycle.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlx5: remove unnecessary pci_set_drvdata()
Zhu Yanjun [Tue, 15 Aug 2017 06:33:06 +0000 (02:33 -0400)]
mlx5: remove unnecessary pci_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not necessary to manually clear the
device driver data to NULL.

Cc: Joe Jin <joe.jin@oracle.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlx4: remove unnecessary pci_set_drvdata()
Zhu Yanjun [Tue, 15 Aug 2017 06:33:05 +0000 (02:33 -0400)]
mlx4: remove unnecessary pci_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not necessary to manually clear the
device driver data to NULL.

Cc: Joe Jin <joe.jin@oracle.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf/verifier: track liveness for pruning
Edward Cree [Tue, 15 Aug 2017 19:34:35 +0000 (20:34 +0100)]
bpf/verifier: track liveness for pruning

State of a register doesn't matter if it wasn't read in reaching an exit;
 a write screens off all reads downstream of it from all explored_states
 upstream of it.
This allows us to prune many more branches; here are some processed insn
 counts for some Cilium programs:
Program                  before  after
bpf_lb_opt_-DLB_L3.o       6515   3361
bpf_lb_opt_-DLB_L4.o       8976   5176
bpf_lb_opt_-DUNKNOWN.o     2960   1137
bpf_lxc_opt_-DDROP_ALL.o  95412  48537
bpf_lxc_opt_-DUNKNOWN.o  141706  78718
bpf_netdev.o              24251  17995
bpf_overlay.o             10999   9385

The runtime is also improved; here are 'time' results in ms:
Program                  before  after
bpf_lb_opt_-DLB_L3.o         24      6
bpf_lb_opt_-DLB_L4.o         26     11
bpf_lb_opt_-DUNKNOWN.o       11      2
bpf_lxc_opt_-DDROP_ALL.o   1288    139
bpf_lxc_opt_-DUNKNOWN.o    1768    234
bpf_netdev.o                 62     31
bpf_overlay.o                15     13

Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'linux-kselftest-4.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Tue, 15 Aug 2017 19:49:43 +0000 (12:49 -0700)]
Merge tag 'linux-kselftest-4.13-rc6-fixes' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull kselftest fixes from Shuah Khan:
 "This update consists of important compile and run-time error fixes to
  timers/freq-step, kmod, and sysctl tests"

* tag 'linux-kselftest-4.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests: timers: freq-step: fix compile error
  selftests: futex: fix run_tests target
  test_sysctl: fix sysctl.sh by making it executable
  test_kmod: fix kmod.sh by making it executable

7 years agoMerge branch 's390-next'
David S. Miller [Tue, 15 Aug 2017 17:58:40 +0000 (10:58 -0700)]
Merge branch 's390-next'

Julian Wiedmann says:

====================
s390/net: updates for 4.14

a mixed bag of minor fixes, cleanups and refactors for net-next. Please apply.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: fix using of ref counter for rxip addresses
Kittipon Meesompop [Tue, 15 Aug 2017 15:02:50 +0000 (17:02 +0200)]
s390/qeth: fix using of ref counter for rxip addresses

IP-address setting and removal are delayed when the device is not yet in
state SOFTSETUP or UP. ref_counter has been implemented only for
ip-address with type normal. In this patch ref_counter logic is also used
for ip-address with type rxip to allow appropriate handling of multiple
postponed rxip add and del calls.

Signed-off-by: Kittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: fix trace-messages for deleting rxip addresses
Kittipon Meesompop [Tue, 15 Aug 2017 15:02:49 +0000 (17:02 +0200)]
s390/qeth: fix trace-messages for deleting rxip addresses

change trace-messages:
- from addrxip4 to delrxip4
- from addrxip6 to delrxip6

Signed-off-by: Kittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: reject multicast rxip addresses
Kittipon Meesompop [Tue, 15 Aug 2017 15:02:48 +0000 (17:02 +0200)]
s390/qeth: reject multicast rxip addresses

There exist different commands to add unicast and multicast addresses on
the OSA card. rxip addresses are always set as unicast addresses and
thus just unicast addresses should be allowed.

Adding a multicast address now fails and a grace message is generated.

Signed-off-by: Kittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: extract bridgeport cmd builder
Julian Wiedmann [Tue, 15 Aug 2017 15:02:47 +0000 (17:02 +0200)]
s390/qeth: extract bridgeport cmd builder

Consolidation of duplicated code, no functional change.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/net: reduce inlining
Julian Wiedmann [Tue, 15 Aug 2017 15:02:46 +0000 (17:02 +0200)]
s390/net: reduce inlining

Clean up the inline cruft in s390 net drivers. Many of the inlined
functions had only one caller anyway.

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: make more use of skb API
Julian Wiedmann [Tue, 15 Aug 2017 15:02:45 +0000 (17:02 +0200)]
s390/qeth: make more use of skb API

Replace some open-coded parts with their proper API calls.

Also remove two skb_[re]set_mac_header() calls in the L2
xmit paths that are clearly no longer required, since at least
commit 6d1ccff62780 ("net: reset mac header in dev_start_xmit()").

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: clean up fill_buffer() offset logic
Julian Wiedmann [Tue, 15 Aug 2017 15:02:44 +0000 (17:02 +0200)]
s390/qeth: clean up fill_buffer() offset logic

For some xmit paths we pass down a data offset to qeth_fill_buffer(),
to indicate that the first k bytes of the skb should be skipped when
mapping it into buffer elements.
Commit acd9776b5c45 ("s390/qeth: no ETH header for outbound AF_IUCV")
recently switched the offset for the IUCV-over-HiperSockets path
from 0 to ETH_HLEN, and now we have

device offset
OSA = 0
IQD > 0

for all xmit paths.

OSA would previously pass down -1 from do_send_packet(), to distinguish
between 1) OSA and 2) IQD with offset 0. That's no longer needed now,
so have it pass 0, make the offset unsigned and clean up how we apply
the offset in __qeth_fill_buffer().

No change of behaviour for any of our current xmit paths.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: straighten out fill_buffer() interface
Julian Wiedmann [Tue, 15 Aug 2017 15:02:43 +0000 (17:02 +0200)]
s390/qeth: straighten out fill_buffer() interface

1. for adjusting the buffer's next_element_to_fill in __fill_buffer(),
   just pass the full qeth_qdio_out_buffer struct
2. when adding a header element, be consistent about passing
   a hint ('is_first_elem') to __fill_buffer()

No functional change.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: simplify fragment type selection
Julian Wiedmann [Tue, 15 Aug 2017 15:02:42 +0000 (17:02 +0200)]
s390/qeth: simplify fragment type selection

Improve readability of the code that determines a buffer element's
fragment type, and reduce the number of cases down from 5 to 3.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: remove extra L3 adapterparms query
Julian Wiedmann [Tue, 15 Aug 2017 15:02:41 +0000 (17:02 +0200)]
s390/qeth: remove extra L3 adapterparms query

qeth_l3_setadapter_parms() queries the device for supported
adapterparms, even though they already have been queried as part of the
device's high-level setup. Remove that extra call.

The only call chain for qeth_l3_setadapter_parms() is
__qeth_l3_set_online()
qeth_core_hardsetup_card()
qeth_query_setadapterparms()
qeth_l3_setadapter_parms()
qeth_query_setadapterparms()

, and we only reach qeth_l3_setadapter_parms() if the first
adapterparms query succeeds. Hence removing the second query results in
no loss of functionality.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: remove extra L2 adapterparms query
Julian Wiedmann [Tue, 15 Aug 2017 15:02:40 +0000 (17:02 +0200)]
s390/qeth: remove extra L2 adapterparms query

qeth_l2_request_initial_mac() queries the device for its supported
adapterparms, even though they already have been queried as part of the
device's high-level setup. Remove that extra call.

The only call chain for qeth_l2_request_initial_mac() is
__qeth_l2_set_online()
qeth_core_hardsetup_card()
qeth_query_setadapterparms()
qeth_l2_setup_netdev()
qeth_l2_request_initial_mac()
qeth_query_setadapterparms()

, and we only reach qeth_l2_request_initial_mac() if the first
adapterparms query succeeds. Hence removing the second query results in
no loss of functionality.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agos390/qeth: don't access skb after transmission
Julian Wiedmann [Tue, 15 Aug 2017 15:02:39 +0000 (17:02 +0200)]
s390/qeth: don't access skb after transmission

After transmitting a skb via send_packet[_fast](), the statistics
code accesses the skb once more to account for transmitted page frags.
This has a (theoretical?) race against the TX completion - if the TX
completion is processed and frees the skb before hard_start_xmit()
gets to the statistics part, we access random memory.

Fix this by caching the # of page frags, before the skb is transmitted.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'wireless-drivers-for-davem-2017-08-15' of git://git.kernel.org/pub/scm...
David S. Miller [Tue, 15 Aug 2017 17:19:14 +0000 (10:19 -0700)]
Merge tag 'wireless-drivers-for-davem-2017-08-15' of git://git./linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for 4.13

This time quite a few fixes for iwlwifi and one major regression fix
for brcmfmac. For the iwlwifi aggregation bug a small change was
needed for mac80211, but as Johannes is still away the mac80211 patch
is taken via wireless-drivers tree.

brcmfmac

* fix firmware crash (a recent regression in bcm4343{0,1,8}

iwlwifi

* Some simple PCI HW ID fix-ups and additions for family 9000

* Remove a bogus warning message with new FWs (bug #196915)

* Don't allow illegal channel options to be used (bug #195299)

* A fix for checksum offload in family 9000

* A fix serious throughput degradation in 11ac with multiple streams

* An old bug in SMPS where the firmware was not aware of SMPS changes

* Fix a memory leak in the SAR code

* Fix a stuck queue case in AP mode;

* Convert a WARN to a simple debug in a legitimate race case (from
  which we can recover)

* Fix a severe throughput aggregation on 9000-family devices due to
  aggregation issues, needed a small change in mac80211
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotcp: fix possible deadlock in TCP stack vs BPF filter
Eric Dumazet [Tue, 15 Aug 2017 00:44:43 +0000 (17:44 -0700)]
tcp: fix possible deadlock in TCP stack vs BPF filter

Filtering the ACK packet was not put at the right place.

At this place, we already allocated a child and put it
into accept queue.

We absolutely need to call tcp_child_process() to release
its spinlock, or we will deadlock at accept() or close() time.

Found by syzkaller team (Thanks a lot !)

Fixes: 8fac365f63c8 ("tcp: Add a tcp_filter hook before handle ack packet")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Chenbo Feng <fengc@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agodccp: purge write queue in dccp_destroy_sock()
Eric Dumazet [Mon, 14 Aug 2017 21:10:25 +0000 (14:10 -0700)]
dccp: purge write queue in dccp_destroy_sock()

syzkaller reported that DCCP could have a non empty
write queue at dismantle time.

WARNING: CPU: 1 PID: 2953 at net/core/stream.c:199 sk_stream_kill_queues+0x3ce/0x520 net/core/stream.c:199
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2953 Comm: syz-executor0 Not tainted 4.13.0-rc4+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:180
 __warn+0x1c4/0x1d9 kernel/panic.c:541
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190
 do_trap_no_signal arch/x86/kernel/traps.c:224 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:273
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323
 invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:846
RIP: 0010:sk_stream_kill_queues+0x3ce/0x520 net/core/stream.c:199
RSP: 0018:ffff8801d182f108 EFLAGS: 00010297
RAX: ffff8801d1144140 RBX: ffff8801d13cb280 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff85137b00 RDI: ffff8801d13cb280
RBP: ffff8801d182f148 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d13cb4d0
R13: ffff8801d13cb3b8 R14: ffff8801d13cb300 R15: ffff8801d13cb3b8
 inet_csk_destroy_sock+0x175/0x3f0 net/ipv4/inet_connection_sock.c:835
 dccp_close+0x84d/0xc10 net/dccp/proto.c:1067
 inet_release+0xed/0x1c0 net/ipv4/af_inet.c:425
 sock_release+0x8d/0x1e0 net/socket.c:597
 sock_close+0x16/0x20 net/socket.c:1126
 __fput+0x327/0x7e0 fs/file_table.c:210
 ____fput+0x15/0x20 fs/file_table.c:246
 task_work_run+0x18a/0x260 kernel/task_work.c:116
 exit_task_work include/linux/task_work.h:21 [inline]
 do_exit+0xa32/0x1b10 kernel/exit.c:865
 do_group_exit+0x149/0x400 kernel/exit.c:969
 get_signal+0x7e8/0x17e0 kernel/signal.c:2330
 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
 exit_to_usermode_loop+0x21c/0x2d0 arch/x86/entry/common.c:157
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath+0x3a7/0x450 arch/x86/entry/common.c:263

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoudp: fix linear skb reception with PEEK_OFF
Al Viro [Mon, 14 Aug 2017 19:31:38 +0000 (21:31 +0200)]
udp: fix linear skb reception with PEEK_OFF

copy_linear_skb() is broken; both of its callers actually
expect 'len' to be the amount we are trying to copy,
not the offset of the end.
Fix it keeping the meanings of arguments in sync with what the
callers (both of them) expect.
Also restore a saner behavior on EFAULT (i.e. preserving
the iov_iter position in case of failure):

The commit fd851ba9caa9 ("udp: harden copy_linear_skb()")
avoids the more destructive effect of the buggy
copy_linear_skb(), e.g. no more invalid memory access, but
said function still behaves incorrectly: when peeking with
offset it can fail with EINVAL instead of copying the
appropriate amount of memory.

Reported-by: Sasha Levin <alexander.levin@verizon.com>
Fixes: b65ac44674dd ("udp: try to avoid 2 cache miss on dequeue")
Fixes: fd851ba9caa9 ("udp: harden copy_linear_skb()")
Signed-off-by: Al Viro <viro@ZenIV.linux.org.uk>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Tested-by: Sasha Levin <alexander.levin@verizon.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: fix issues with fw_type module parameter
Derek Chickles [Mon, 14 Aug 2017 19:17:56 +0000 (12:17 -0700)]
liquidio: fix issues with fw_type module parameter

The fw_type module parameter isn't showing up in the
/sys/module/liquidio/parameters directory.  Fix it by setting the read
permission bits for user, group, other in module_param_string().  Revise
the description of fw_type.  Initialize the fw_type static char array with
the default value to conform to the module parameter description.

Signed-off-by: Derek Chickles <derek.chickles@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'mlxsw-Add-support-for-nexthop-group-consolidation-for-IPv6'
David S. Miller [Tue, 15 Aug 2017 05:23:32 +0000 (22:23 -0700)]
Merge branch 'mlxsw-Add-support-for-nexthop-group-consolidation-for-IPv6'

Jiri Pirko says:

====================
mlxsw: Add support for nexthop group consolidation for IPv6

Arkadi says:

Due to limited ASIC resources the maximum number of routes is limited by
the nexthop resource. In order to improve the routing scale nexthop
consolidation should be performed.

In case of IPv4, the kernel does the consolidation of nexthops in the form
of the fib_info struct. In that case, the driver uses the fib_info's
address as a key for the internal nexthop group representative struct
lookup. In case of IPv6, the kernel doesn't do consolidation, thus the
driver should implement it by itself.

The hash value is calculated based on the nexthop set, by performing
bitwise xor on the ifindexs of the nexthops, in a similar way to IPV4's
kernel implementation. In case of collision a full match is performed
between the sets which include address and ifindex comparison.

In order to use the same hash table in both cases (IPv4/6), the rhashtable
is changed to operate on variable length key.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_router: Add support for nexthop group consolidation for IPv6
Arkadi Sharshevsky [Mon, 14 Aug 2017 19:09:20 +0000 (21:09 +0200)]
mlxsw: spectrum_router: Add support for nexthop group consolidation for IPv6

Due to limited ASIC resources the maximum number of routes is limited by
the nexthop resource. In order to improve the routing scale nexthop
consolidation should be performed.

This patch adds support for IPv6 neighbor consolidation. The hash value
is calculated based on the nexthop set, by performing bitwise xor on the
ifindexs of the nexthops, in a similar way to IPv4's kernel implementation.
In case of collision a full match is performed between the sets which
include address and ifindex comparison.

Non gateway nexthop groups are not inserted to the hash table due to
lack of nexthop device (ifindex).

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_router: Prepare nexthop group's hash table for IPv6
Arkadi Sharshevsky [Mon, 14 Aug 2017 19:09:19 +0000 (21:09 +0200)]
mlxsw: spectrum_router: Prepare nexthop group's hash table for IPv6

This patch does preparation before introducing IPv6 nexthop group
consolidation. Currently the nexthop group hash table is used only by
IPv4 and uses fixed key size. In order to support the IPv6's variable
length key the current table is changed.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'liquidio-adding-support-for-ethtool-set-ring-feature'
David S. Miller [Tue, 15 Aug 2017 05:21:41 +0000 (22:21 -0700)]
Merge branch 'liquidio-adding-support-for-ethtool-set-ring-feature'

Intiyaz Basha says:

====================
liquidio: adding support for ethtool --set-ring feature

Code reorganization is required for adding ethtool --set-ring feature.
First seven patches are for code reorganization.  The last patch is for
adding this feature.

Change Log:
V1 -> V2
 Only patch #8 was changed:  unnecessary parentheses were removed in two
 if-statements in lio_ethtool_set_ringparam().
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: added support for ethtool --set-ring feature
Intiyaz Basha [Mon, 14 Aug 2017 19:01:56 +0000 (12:01 -0700)]
liquidio: added support for ethtool --set-ring feature

added support for ethtool --set-ring feature

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved liquidio_setup_io_queues to lio_core.c
Intiyaz Basha [Mon, 14 Aug 2017 19:01:53 +0000 (12:01 -0700)]
liquidio: moved liquidio_setup_io_queues to lio_core.c

Moving common liquidio_setup_io_queues to lio_core.c

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved liquidio_napi_poll to lio_core.c
Intiyaz Basha [Mon, 14 Aug 2017 19:01:50 +0000 (12:01 -0700)]
liquidio: moved liquidio_napi_poll to lio_core.c

Moving common liquidio_napi_poll to lio_core.c

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved liquidio_napi_drv_callback to lio_core.c
Intiyaz Basha [Mon, 14 Aug 2017 19:01:48 +0000 (12:01 -0700)]
liquidio: moved liquidio_napi_drv_callback to lio_core.c

Moving common liquidio_napi_drv_callback to lio_core.c

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved liquidio_push_packet to lio_core.c
Intiyaz Basha [Mon, 14 Aug 2017 19:01:44 +0000 (12:01 -0700)]
liquidio: moved liquidio_push_packet to lio_core.c

Moving common liquidio_push_packet to lio_core.c

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved octeon_setup_droq to lio_core.c
Intiyaz Basha [Mon, 14 Aug 2017 19:01:41 +0000 (12:01 -0700)]
liquidio: moved octeon_setup_droq to lio_core.c

Moving common octeon_setup_droq to lio_core.c

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved update_txq_status to lio_core.c
Intiyaz Basha [Mon, 14 Aug 2017 19:01:37 +0000 (12:01 -0700)]
liquidio: moved update_txq_status to lio_core.c

Moving common update_txq_status to lio_core.c

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: moved wait_for_pending_requests to octeon_network.h
Intiyaz Basha [Mon, 14 Aug 2017 19:01:31 +0000 (12:01 -0700)]
liquidio: moved wait_for_pending_requests to octeon_network.h

Moving common function wait_for_pending_requests to octeon_network.h

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv6: release rt6->rt6i_idev properly during ifdown
Wei Wang [Mon, 14 Aug 2017 17:44:59 +0000 (10:44 -0700)]
ipv6: release rt6->rt6i_idev properly during ifdown

When a dst is created by addrconf_dst_alloc() for a host route or an
anycast route, dst->dev points to loopback dev while rt6->rt6i_idev
points to a real device.
When the real device goes down, the current cleanup code only checks for
dst->dev and assumes rt6->rt6i_idev->dev is the same. This causes the
refcount leak on the real device in the above situation.
This patch makes sure to always release the refcount taken on
rt6->rt6i_idev during dst_dev_put().

Fixes: 587fea741134 ("ipv6: mark DST_NOGC and remove the operation of
dst_free()")
Reported-by: John Stultz <john.stultz@linaro.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Tested-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoaf_key: do not use GFP_KERNEL in atomic contexts
Eric Dumazet [Mon, 14 Aug 2017 17:16:45 +0000 (10:16 -0700)]
af_key: do not use GFP_KERNEL in atomic contexts

pfkey_broadcast() might be called from non process contexts,
we can not use GFP_KERNEL in these cases [1].

This patch partially reverts commit ba51b6be38c1 ("net: Fix RCU splat in
af_key"), only keeping the GFP_ATOMIC forcing under rcu_read_lock()
section.

[1] : syzkaller reported :

in_atomic(): 1, irqs_disabled(): 0, pid: 2932, name: syzkaller183439
3 locks held by syzkaller183439/2932:
 #0:  (&net->xfrm.xfrm_cfg_mutex){+.+.+.}, at: [<ffffffff83b43888>] pfkey_sendmsg+0x4c8/0x9f0 net/key/af_key.c:3649
 #1:  (&pfk->dump_lock){+.+.+.}, at: [<ffffffff83b467f6>] pfkey_do_dump+0x76/0x3f0 net/key/af_key.c:293
 #2:  (&(&net->xfrm.xfrm_policy_lock)->rlock){+...+.}, at: [<ffffffff83957632>] spin_lock_bh include/linux/spinlock.h:304 [inline]
 #2:  (&(&net->xfrm.xfrm_policy_lock)->rlock){+...+.}, at: [<ffffffff83957632>] xfrm_policy_walk+0x192/0xa30 net/xfrm/xfrm_policy.c:1028
CPU: 0 PID: 2932 Comm: syzkaller183439 Not tainted 4.13.0-rc4+ #24
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:5994
 __might_sleep+0x95/0x190 kernel/sched/core.c:5947
 slab_pre_alloc_hook mm/slab.h:416 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 kmem_cache_alloc+0x24b/0x6e0 mm/slab.c:3559
 skb_clone+0x1a0/0x400 net/core/skbuff.c:1037
 pfkey_broadcast_one+0x4b2/0x6f0 net/key/af_key.c:207
 pfkey_broadcast+0x4ba/0x770 net/key/af_key.c:281
 dump_sp+0x3d6/0x500 net/key/af_key.c:2685
 xfrm_policy_walk+0x2f1/0xa30 net/xfrm/xfrm_policy.c:1042
 pfkey_dump_sp+0x42/0x50 net/key/af_key.c:2695
 pfkey_do_dump+0xaa/0x3f0 net/key/af_key.c:299
 pfkey_spddump+0x1a0/0x210 net/key/af_key.c:2722
 pfkey_process+0x606/0x710 net/key/af_key.c:2814
 pfkey_sendmsg+0x4d6/0x9f0 net/key/af_key.c:3650
sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 ___sys_sendmsg+0x755/0x890 net/socket.c:2035
 __sys_sendmsg+0xe5/0x210 net/socket.c:2069
 SYSC_sendmsg net/socket.c:2080 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2076
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x445d79
RSP: 002b:00007f32447c1dc8 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445d79
RDX: 0000000000000000 RSI: 000000002023dfc8 RDI: 0000000000000008
RBP: 0000000000000086 R08: 00007f32447c2700 R09: 00007f32447c2700
R10: 00007f32447c2700 R11: 0000000000000202 R12: 0000000000000000
R13: 00007ffe33edec4f R14: 00007f32447c29c0 R15: 0000000000000000

Fixes: ba51b6be38c1 ("net: Fix RCU splat in af_key")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: David Ahern <dsa@cumulusnetworks.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotcp: ulp: avoid module refcnt leak in tcp_set_ulp
Sabrina Dubroca [Mon, 14 Aug 2017 16:04:24 +0000 (18:04 +0200)]
tcp: ulp: avoid module refcnt leak in tcp_set_ulp

__tcp_ulp_find_autoload returns tcp_ulp_ops after taking a reference on
the module. Then, if ->init fails, tcp_set_ulp propagates the error but
nothing releases that reference.

Fixes: 734942cc4ea6 ("tcp: ULP infrastructure")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'Add-new-PCI_DEV_FLAGS_NO_RELAXED_ORDERING-flag'
David S. Miller [Tue, 15 Aug 2017 05:14:51 +0000 (22:14 -0700)]
Merge branch 'Add-new-PCI_DEV_FLAGS_NO_RELAXED_ORDERING-flag'

Ding Tianhong says:

====================
Add new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag

Some devices have problems with Transaction Layer Packets with the Relaxed
Ordering Attribute set.  This patch set adds a new PCIe Device Flag,
PCI_DEV_FLAGS_NO_RELAXED_ORDERING, a set of PCI Quirks to catch some known
devices with Relaxed Ordering issues, and a use of this new flag by the
cxgb4 driver to avoid using Relaxed Ordering with problematic Root Complex
Ports.

It's been years since I've submitted kernel.org patches, I appolgise for the
almost certain submission errors.

v2: Alexander point out that the v1 was only a part of the whole solution,
    some platform which has some issues could use the new flag to indicate
    that it is not safe to enable relaxed ordering attribute, then we need
    to clear the relaxed ordering enable bits in the PCI configuration when
    initializing the device. So add a new second patch to modify the PCI
    initialization code to clear the relaxed ordering enable bit in the
    event that the root complex doesn't want relaxed ordering enabled.

    The third patch was base on the v1's second patch and only be changed
    to query the relaxed ordering enable bit in the PCI configuration space
    to allow the Chelsio NIC to send TLPs with the relaxed ordering attributes
    set.

    This version didn't plan to drop the defines for Intel Drivers to use the
    new checking way to enable relaxed ordering because it is not the hardest
    part of the moment, we could fix it in next patchset when this patches
    reach the goal.

v3: Redesigned the logic for pci_configure_relaxed_ordering when configuration,
    If a PCIe device didn't enable the relaxed ordering attribute default,
    we should not do anything in the PCIe configuration, otherwise we
    should check if any of the devices above us do not support relaxed
    ordering by the PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag, then base on
    the result if we get a return that indicate that the relaxed ordering
    is not supported we should update our device to disable relaxed ordering
    in configuration space. If the device above us doesn't exist or isn't
    the PCIe device, we shouldn't do anything and skip updating relaxed ordering
    because we are probably running in a guest.

v4: Rename the functions pcie_get_relaxed_ordering and pcie_disable_relaxed_ordering
    according John's suggestion, and modify the description, use the true/false
    as the return value.

    We shouldn't enable relaxed ordering attribute by the setting in the root
    complex configuration space for PCIe device, so fix it for cxgb4.

    Fix some format issues.

v5: Removed the unnecessary code for some function which only return the bool
    value, and add the check for VF device.

    Make this patch set base on 4.12-rc5.

v6: Fix the logic error in the need to enable the relaxed ordering attribute for cxgb4.

v7: The cxgb4 drivers will enable the PCIe Capability Device Control[Relaxed
    Ordering Enable] in PCI Probe() routine, this will break our current
    solution for some platform which has problematic when enable the relaxed
    ordering attribute. According to the latest recommendations, remove the
    enable_pcie_relaxed_ordering(), although it could not cover the Peer-to-Peer
    scene, but we agree to leave this problem until we really trigger it.

    Make this patch set base on 4.12 release version.

v8: Change the second patch title and description to make it more reasonable,
    add the acked-by from Alex and Ashok.

    Add a new patch to enable the Relaxed Ordering Attribute for cxgb4vf driver.

    Make this patch set base on 4.13-rc2.

v9: The document (https://software.intel.com/sites/default/files/managed/9e/
    bc/64-ia-32-architectures-optimization-manual.pdf) indicate that the Xeon
    processors based on Broadwell/Haswell microarchitecture has the problem
    with Relaxed Ordering Attribute enabled, so add the whole list Device ID
    from Intel to the patch.

v10: Significant rework based on Bjorn's feedback, reorganize the first 2 patches,
     now the Intel and AMD erratum soc has been divided to the different patches,
     rename the pcie_relaxed_ordering_supported() to pcie_relaxed_ordering_enabled(),
     and no need to check every intervening switch except the root ports, update
     some commits.

v11: We shouldn't let the Intel engineer to acked the AMD's erratum patch, fix the
     funny mistake.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet/cxgb4vf: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag
Casey Leedom [Tue, 15 Aug 2017 03:23:27 +0000 (11:23 +0800)]
net/cxgb4vf: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag

cxgb4vf Ethernet driver now queries PCIe configuration space to
determine if it can send TLPs to it with the Relaxed Ordering
Attribute set, just like the pf did.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Reviewed-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet/cxgb4: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag
Casey Leedom [Tue, 15 Aug 2017 03:23:26 +0000 (11:23 +0800)]
net/cxgb4: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag

cxgb4 Ethernet driver now queries PCIe configuration space to determine
if it can send TLPs to it with the Relaxed Ordering Attribute set.

Remove the enable_pcie_relaxed_ordering() to avoid enable PCIe Capability
Device Control[Relaxed Ordering Enable] at probe routine, to make sure
the driver will not send the Relaxed Ordering TLPs to the Root Complex which
could not deal the Relaxed Ordering TLPs.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Reviewed-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoPCI: Disable Relaxed Ordering Attributes for AMD A1100
dingtianhong [Tue, 15 Aug 2017 03:23:25 +0000 (11:23 +0800)]
PCI: Disable Relaxed Ordering Attributes for AMD A1100

Casey reported that the AMD ARM A1100 SoC has a bug in its PCIe
Root Port where Upstream Transaction Layer Packets with the Relaxed
Ordering Attribute clear are allowed to bypass earlier TLPs with
Relaxed Ordering set, it would cause Data Corruption, so we need
to disable Relaxed Ordering Attribute when Upstream TLPs to the
Root Port.

Reported-and-suggested-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Acked-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoPCI: Disable Relaxed Ordering for some Intel processors
dingtianhong [Tue, 15 Aug 2017 03:23:24 +0000 (11:23 +0800)]
PCI: Disable Relaxed Ordering for some Intel processors

According to the Intel spec section 3.9.1 said:

    3.9.1 Optimizing PCIe Performance for Accesses Toward Coherent Memory
          and Toward MMIO Regions (P2P)

    In order to maximize performance for PCIe devices in the processors
    listed in Table 3-6 below, the soft- ware should determine whether the
    accesses are toward coherent memory (system memory) or toward MMIO
    regions (P2P access to other devices). If the access is toward MMIO
    region, then software can command HW to set the RO bit in the TLP
    header, as this would allow hardware to achieve maximum throughput for
    these types of accesses. For accesses toward coherent memory, software
    can command HW to clear the RO bit in the TLP header (no RO), as this
    would allow hardware to achieve maximum throughput for these types of
    accesses.

    Table 3-6. Intel Processor CPU RP Device IDs for Processors Optimizing
               PCIe Performance

    Processor                            CPU RP Device IDs

    Intel Xeon processors based on       6F01H-6F0EH
    Broadwell microarchitecture

    Intel Xeon processors based on       2F01H-2F0EH
    Haswell microarchitecture

It means some Intel processors has performance issue when use the Relaxed
Ordering Attribute, so disable Relaxed Ordering for these root port.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoPCI: Disable PCIe Relaxed Ordering if unsupported
dingtianhong [Tue, 15 Aug 2017 03:23:23 +0000 (11:23 +0800)]
PCI: Disable PCIe Relaxed Ordering if unsupported

When bit4 is set in the PCIe Device Control register, it indicates
whether the device is permitted to use relaxed ordering.
On some platforms using relaxed ordering can have performance issues or
due to erratum can cause data-corruption. In such cases devices must avoid
using relaxed ordering.

The patch adds a new flag PCI_DEV_FLAGS_NO_RELAXED_ORDERING to indicate that
Relaxed Ordering (RO) attribute should not be used for Transaction Layer
Packets (TLP) targeted towards these affected root complexes.

This patch checks if there is any node in the hierarchy that indicates that
using relaxed ordering is not safe. In such cases the patch turns off the
relaxed ordering by clearing the capability for this device.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Acked-by: Ashok Raj <ashok.raj@intel.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'md/4.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
Linus Torvalds [Mon, 14 Aug 2017 20:09:59 +0000 (13:09 -0700)]
Merge tag 'md/4.13-rc5' of git://git./linux/kernel/git/shli/md

Pull MD fixes from Shaohua Li:
 "Fix several bugs:

   - fix a rcu stall issue introduced in 4.12 (Neil Brown)

   - fix two raid5 cache race conditions (Song Liu)"

* tag 'md/4.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  MD: not clear ->safemode for external metadata array
  md/r5cache: fix io_unit handling in r5l_log_endio()
  md/r5cache: call mddev_lock/unlock() in r5c_journal_mode_set
  md: fix test in md_write_start()
  md: always clear ->safemode when md_check_recovery gets the mddev lock.

7 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Mon, 14 Aug 2017 18:35:56 +0000 (11:35 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
 "Fix an error path bug in ixp4xx as well as a read overrun in
 sha1-avx2"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: x86/sha1 - Fix reads beyond the number of blocks passed
  crypto: ixp4xx - Fix error handling path in 'aead_perform()'

7 years agotipc: avoid inheriting msg_non_seq flag when message is returned
Jon Paul Maloy [Mon, 14 Aug 2017 16:28:49 +0000 (18:28 +0200)]
tipc: avoid inheriting msg_non_seq flag when message is returned

In the function msg_reverse(), we reverse the header while trying to
reuse the original buffer whenever possible. Those rejected/returned
messages are always transmitted as unicast, but the msg_non_seq field
is not explicitly set to zero as it should be.

We have seen cases where multicast senders set the message type to
"NOT dest_droppable", meaning that a multicast message shorter than
one MTU will be returned, e.g., during receive buffer overflow, by
reusing the original buffer. This has the effect that even the
'msg_non_seq' field is inadvertently inherited by the rejected message,
although it is now sent as a unicast message. This again leads the
receiving unicast link endpoint to steer the packet toward the broadcast
link receive function, where it is dropped. The affected unicast link is
thereafter (after 100 failed retransmissions) declared 'stale' and
reset.

We fix this by unconditionally setting the 'msg_non_seq' flag to zero
for all rejected/returned messages.

Reported-by: Canh Duc Luu <canh.d.luu@dektech.com.au>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotipc: accept PACKET_MULTICAST packets
Jon Paul Maloy [Mon, 14 Aug 2017 15:55:56 +0000 (17:55 +0200)]
tipc: accept PACKET_MULTICAST packets

On L2 bearers, the TIPC broadcast function is sending out packets using
the corresponding L2 broadcast address. At reception, we filter such
packets under the assumption that they will also be delivered as
broadcast packets.

This assumption doesn't always hold true. Under high load, we have seen
that a switch may convert the destination address and deliver the packet
as a PACKET_MULTICAST, something leading to inadvertently dropped
packets and a stale and reset broadcast link.

We fix this by extending the reception filtering to accept packets of
type PACKET_MULTICAST.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'mlnx-i2c'
David S. Miller [Mon, 14 Aug 2017 18:18:16 +0000 (11:18 -0700)]
Merge branch 'mlnx-i2c'

Ohad Oz says:

====================
Enable Mellanox switch device in I2C mode

The following patch set updates global to Mellanox Kconfig files to support
configuration of Mellanox Switch (mlxsw) without PCI and with I2C only.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoChange Kconfig description
Ohad Oz [Mon, 14 Aug 2017 15:38:22 +0000 (15:38 +0000)]
Change Kconfig description

This patch apply Mellanox network vendor which includes:
- Mellanox card devices: ConnectX-4, ConnectX-5 and Connect-IB cards.
- Mellanox switch device: SwitchX-2 Switch-IB, Spectrum.
Therefore rephrasing help.

Signed-off-by: Ohad Oz <ohado@mellanox.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoAllow Mellanox switch devices to be configured if only I2C bus is set
Ohad Oz [Mon, 14 Aug 2017 15:38:21 +0000 (15:38 +0000)]
Allow Mellanox switch devices to be configured if only I2C bus is set

Mellanox switches (mlxsw) supports I2C systems without PCI, in order to
give the ability to the users to use such functionality, there is need
to update Kconfig.

Signed-off-by: Ohad Oz <ohado@mellanox.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: phy: Use tab for indentation in Kconfig
Michal Simek [Mon, 14 Aug 2017 13:43:00 +0000 (15:43 +0200)]
net: phy: Use tab for indentation in Kconfig

Using tabs instead of space for indentation.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'mlxsw-spectrum_router-Increase-VRF-scale'
David S. Miller [Mon, 14 Aug 2017 18:14:03 +0000 (11:14 -0700)]
Merge branch 'mlxsw-spectrum_router-Increase-VRF-scale'

Jiri Pirko says:

====================
mlxsw: spectrum_router: Increase VRF scale

Ido says:

The purpose of this set is to increase the maximum number of supported VRF
devices on top of the Spectrum ASIC under different workloads.

This is achieved by sharing the same LPM tree across all the virtual
routers for a given L3 protocol (IPv4 / IPv6). The change is explained in
detail in the third patch. First two patches are small changes to make
review easier.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_router: Use one LPM tree for all virtual routers
Ido Schimmel [Mon, 14 Aug 2017 08:54:05 +0000 (10:54 +0200)]
mlxsw: spectrum_router: Use one LPM tree for all virtual routers

The number of LPM trees available for lookup is much smaller than the
number of virtual routers, which are used to implement VRFs. In
addition, an LPM tree can only be used by one protocol - either IPv4 or
IPv6.

Therefore, in order to increase the number of supported virtual routers
to the maximum we need to be able to share LPM trees across virtual
routers instead of trying to find an optimized tree for each.

Do that by allocating one LPM tree for each protocol, but make sure it
will only include prefixes that are actually used, so as to not perform
unnecessary lookups.

Since changing the structure of a bound tree isn't recommended, whenever
a new tree it required, it's first created and then bound to each
virtual router, replacing the old one.

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>
7 years agomlxsw: spectrum_router: Pass argument explicitly
Ido Schimmel [Mon, 14 Aug 2017 08:54:04 +0000 (10:54 +0200)]
mlxsw: spectrum_router: Pass argument explicitly

Instead of relying on the LPM tree to be assigned to the virtual router
before binding the two, lets pass it explicitly.

This will later allow us to return upon binding error instead of having
to perform a rollback of the assignment.

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>
7 years agomlxsw: spectrum_router: Return void from deletion functions
Ido Schimmel [Mon, 14 Aug 2017 08:54:03 +0000 (10:54 +0200)]
mlxsw: spectrum_router: Return void from deletion functions

There is no point in returning a value from function whose return value
is never checked.

Even if the return value was checked, there wouldn't be anything to do
about it, as these functions are either called from error or deletion
paths.

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>
7 years agoipv4: route: fix inet_rtm_getroute induced crash
Florian Westphal [Sun, 13 Aug 2017 22:52:58 +0000 (00:52 +0200)]
ipv4: route: fix inet_rtm_getroute induced crash

"ip route get $daddr iif eth0 from $saddr" causes:
 BUG: KASAN: use-after-free in ip_route_input_rcu+0x1535/0x1b50
 Call Trace:
  ip_route_input_rcu+0x1535/0x1b50
  ip_route_input_noref+0xf9/0x190
  tcp_v4_early_demux+0x1a4/0x2b0
  ip_rcv+0xbcb/0xc05
  __netif_receive_skb+0x9c/0xd0
  netif_receive_skb_internal+0x5a8/0x890

Problem is that inet_rtm_getroute calls either ip_route_input_rcu (if an
iif was provided) or ip_route_output_key_hash_rcu.

But ip_route_input_rcu, unlike ip_route_output_key_hash_rcu, already
associates the dst_entry with the skb.  This clears the SKB_DST_NOREF
bit (i.e. skb_dst_drop will release/free the entry while it should not).

Thus only set the dst if we called ip_route_output_key_hash_rcu().

I tested this patch by running:
 while true;do ip r get 10.0.1.2;done > /dev/null &
 while true;do ip r get 10.0.1.2 iif eth0  from 10.0.1.1;done > /dev/null &
... and saw no crash or memory leak.

Cc: Roopa Prabhu <roopa@cumulusnetworks.com>
Cc: David Ahern <dsahern@gmail.com>
Fixes: ba52d61e0ff ("ipv4: route: restore skb_dst_set in inet_rtm_getroute")
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoqlge: fix duplicated code for different branches
Gustavo A. R. Silva [Sun, 13 Aug 2017 01:58:40 +0000 (20:58 -0500)]
qlge: fix duplicated code for different branches

Refactor code in order to avoid identical code for different branches.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: fix duplicated code for different branches
Gustavo A. R. Silva [Sun, 13 Aug 2017 01:38:55 +0000 (20:38 -0500)]
liquidio: fix duplicated code for different branches

Refactor code in order to avoid identical code for different branches.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoliquidio: update debug console logging mechanism
Rick Farrington [Sat, 12 Aug 2017 01:43:14 +0000 (18:43 -0700)]
liquidio: update debug console logging mechanism

- remove logging dependency upon global func octeon_console_debug_enabled()
- abstract debug console logging using console structure (via function ptr)
  to allow for more flexible logging

Signed-off-by: Rick Farrington <ricardo.farrington@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobrcmfmac: feature check for multi-scheduled scan fails on bcm4343x devices
Arend Van Spriel [Fri, 11 Aug 2017 10:07:36 +0000 (11:07 +0100)]
brcmfmac: feature check for multi-scheduled scan fails on bcm4343x devices

The firmware feature check introduced for multi-scheduled scan turned out
to be failing for bcm4343{0,1,8} devices resulting in a firmware crash.
The reason for this crash has not yet been root cause so this patch avoids
the feature check for those device as a short-term fix.

Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Reported-by: Ian Molton <ian@mnementh.co.uk>
Fixes: 9fe929aaace6 ("brcmfmac: add firmware feature detection for gscan feature")
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>