Commit graph

737148 commits

Author SHA1 Message Date
Jayachandran C
f3d795d9b3 arm64: Branch predictor hardening for Cavium ThunderX2
Use PSCI based mitigation for speculative execution attacks targeting
the branch predictor. We use the same mechanism as the one used for
Cortex-A CPUs, we expect the PSCI version call to have a side effect
of clearing the BTBs.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jayachandran C <jnair@caviumnetworks.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-01-23 19:59:20 +00:00
Trond Myklebust
8f39fce84a NFS-over-RDMA client updates for Linux 4.16
New features:
 - xprtrdma tracepoints
 
 Bugfixes and cleanups:
 - Fix memory leak if rpcrdma_buffer_create() fails
 - Fix allocating extra rpcrdma_reps for the backchannel
 - Remove various unused and redundant variables and lock cycles
 - Fix IPv6 support in xprt_rdma_set_port()
 - Fix memory leak by calling buf_free for callback replies
 - Fix "bytes registered" accounting
 - Fix kernel-doc comments
 - SUNRPC tracepoint cleanups for consistent information
 - Optimizations for __rpc_execute()
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEnZ5MQTpR7cLU7KEp18tUv7ClQOsFAlpniEEACgkQ18tUv7Cl
 QOsoGQ//ctg5iKTLlnjobnPdtS4zCQCgD8upx/FLawo/LCkDRiRD+lPNbSWy25db
 Z/YcYslUuwli3J9PoF36DxBAoep+N5LvD2IIwifr72tbwaRR+gK/xRdxdbiFXYod
 9HK+qBN5qRcgKpxPoHHGj9CoF/6ATcqyLhy7bP30UjNhydmlkaYEF1KXeO/l4NQu
 CQUyumdy0M9T8QW4EkXY2vkjS9leC4byI8P4iMaJnq157sYYVxLMryDGayK4ZJNH
 kmeAZoDhvNm+HKyD7vX90+w8/LPQutJ/A7m309KyMHiZZ23KxDW7r9ZclzcOswd1
 NY8HjyUHjl6gvFN9DmtOz95eKmmh1SpCQstw6lKTtNBVzP3+Dw9Lp2tLQFwuCe9y
 uzD/GYcFJECyBoHU4xsm9kV0PuzwAfvXahnylLjf7yV4MlDpjOZQT/vMvA96XHo6
 oOpT3+zikwCHz2FZM0cj5fQ0uQrxsx2zxAcmr8v5StC17Ng94LQH5ByAiOleJ14p
 Az+mAYATNgmSDD07+7UrEH7LD1b2h2xmdbaOa7UXeK2jJaYewGlUEKhKXIhjKJy9
 t2yecGKj4Y7omkNf/0YHle2t6WhNyFqjpISiF1KwuGHuqU5krPCpgKBOnuABcJTx
 D1BuSw4YQ5ZDfb2w0HAbPuwwRnU5FY1K79MIm7VkdE9ozWfmShA=
 =67UR
 -----END PGP SIGNATURE-----

Merge tag 'nfs-rdma-for-4.16-1' of git://git.linux-nfs.org/projects/anna/linux-nfs

NFS-over-RDMA client updates for Linux 4.16

New features:
- xprtrdma tracepoints

Bugfixes and cleanups:
- Fix memory leak if rpcrdma_buffer_create() fails
- Fix allocating extra rpcrdma_reps for the backchannel
- Remove various unused and redundant variables and lock cycles
- Fix IPv6 support in xprt_rdma_set_port()
- Fix memory leak by calling buf_free for callback replies
- Fix "bytes registered" accounting
- Fix kernel-doc comments
- SUNRPC tracepoint cleanups for consistent information
- Optimizations for __rpc_execute()
2018-01-23 14:55:50 -05:00
Amritha Nambiar
bbf0bdd41f i40e: Fix channel addition in reset flow
Fix recreating the channel VSIs during the reset flow to reconfigure
the Tx rings and the queue context associated with the channel VSI.
Also update the next_base_queue for the VSI while rebuilding the
channel VSIs after a reset.

Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Alan Brady
e0346f9fcb i40evf: ignore link up if not running
If we receive the link status message from PF with link up before queues
are actually enabled, it will trigger a TX hang.  This fixes the issue
by ignoring a link up message if the VF state is not yet in RUNNING
state.

Signed-off-by: Alan Brady <alan.brady@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Markus Elfring
557450c301 i40e: Delete an error message for a failed memory allocation in i40e_init_interrupt_scheme()
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Shiraz Saleem
7b0b1a6d0a i40e: Disable iWARP VSI PETCP_ENA flag on netdev down events
Client close is overloaded to handle both un-registration and
netdev down event. On netdev down, i40iw client close is called
which unregisters the RDMA dev and this is too destructive
since the netdev is still registered.

Do not call client close/open on netdev down/up events. Instead
disable the PE TCP_ENA flag during a netdev down event. This
blocks all TCP traffic to the RDMA Protocol Engine. On netdev up,
re-enable the flag.

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Mitch Williams
bc73234bcd i40e: simplify pointer dereferences
Now that i40e_vsi_config_tc() has the pf and hw variable defined, use
them, instead of dereferencing vsi->back. Much easier to read.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Mitch Williams
d8a8785660 i40e: check for invalid DCB config
The driver (and the entire netdev layer for that matter) assumes
that TC0 will always be present in our DCB configuration.
Unfortunately, this isn't always the case. Rather than fail to
configure the VSI, let's go ahead and try to make it work, even
though DCB will end up being disabled by the kernel.

If the driver fails to configure DCB, the driver queries what's
valid, then writes that back to the hardware, always forcing TC0.

This fixes a bug where the driver could fail to adhere to ETS BW
allocations if 8 TCs were configured on the switch.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Sudheer Mogilappagari
07d44190a3 i40e/i40evf: Detect and recover hung queue scenario
In VFs, there is a known issue which can cause writebacks
to not occur when interrupts are disabled and there are
less than 4 descriptors resulting in TX timeout. Timeout
can also occur due to lost interrupt.

The current implementation for detecting and recovering
from hung queues in the PF is problematic because it actually
actively encourages lost interrupts.  By triggering a SW
interrupt, interrupts are forced on.  If we are already in
napi_poll and an interrupt fires, napi_poll will not be
rescheduled and the interrupt is effectively lost; thereby
potentially *causing* hung queues.

This patch checks whether packets are being processed between
every watchdog cycle and determine potential hung queue and
fires triggers SW interrupt only for that particular queue.

Signed-off-by: Sudheer Mogilappagari <sudheer.mogilappagari@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Michal Kuchta
d95cd48060 i40e: Fix for blinking activity instead of link LEDs
This fix solves an issue occurring while calling i40e_led_set function
from the driver with "blink" parameter set as TRUE. This call resulted
in Activity LED blinking instead of Link LED, which may lead to errors
in physically identifying the port, since Activity LED may be blinking
for different reasons as well.

Signed-off-by: Michal Kuchta <michal.kuchta@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Avinash Dayanand
06aa040f03 i40evf: Don't schedule reset_task when device is being removed
When a host disables and enables a PF device, all the associated
VFs are removed and added back in. It also generates a PFR which in turn
resets all the connected VFs. This behaviour is different from that of
Linux guest on Linux host. Hence we end up in a situation where there's
a PFR and device removal at the same time. And watchdog doesn't have a
clue about this and schedules a reset_task. This patch adds code to send
signal to reset_task that the device is currently being removed.

Signed-off-by: Avinash Dayanand <avinash.dayanand@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Sudheer Mogilappagari
a558566bef i40evf: remove flush_scheduled_work call in i40evf_remove
flush_schedule_work blocks until completion of all scheduled
work items in global work-queue. This can cause deadlock in some
cases. i40evf_remove() cleans up necessary work items with
cancel_delayed_work_sync and cancel_work_sync. This fix removes
flush_schedule_work call inside i40evf_remove().

Signed-off-by: Sudheer Mogilappagari <sudheer.mogilappagari@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Mitch Williams
b356dac8ab i40e: avoid divide by zero
In some weird circumstances with DCB enabled, the firmware can fail to
configure the VSI, leaving us with zero traffic classes. Check for this
state when we configure RSS to avoid a panic.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Pawel Jablonski
e3a5d6e6fa i40e/i40evf: Enable NVMUpdate to retrieve AdminQ and add preservation flags for NVM update
This patch adds new I40E_NVMUPD_GET_AQ_EVENT state to allow
retrieval of AdminQ events as a result of AdminQ commands sent
to firmware.

Add preservation flags support on X722 devices for NVM update
AdminQ function wrapper. Add new parameter and handling to
nvmupdate admin queue function intended to allow nvmupdate tool
to configure the preservation flags in the AdminQ command.

This is required to implement FlatNVM on X722 devices.

Signed-off-by: Pawel Jablonski <pawel.jablonski@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 11:29:19 -08:00
Keith Busch
62314e405f nvme-pci: Fix queue double allocations
The queue count says the highest queue that's been allocated, so don't
reallocate a queue lower than that.

Fixes: 147b27e4bd ("nvme-pci: allocate device queues storage space at probe")
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-01-23 20:15:34 +01:00
David S. Miller
5ca114400d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
en_rx_am.c was deleted in 'net-next' but had a bug fixed in it in
'net'.

The esp{4,6}_offload.c conflicts were overlapping changes.
The 'out' label is removed so we just return ERR_PTR(-EINVAL)
directly.

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-23 13:51:56 -05:00
Luis de Bethencourt
1c47a645ba device-dax: Fix trailing semicolon
The trailing semicolon is an empty statement that does no operation.
Removing it since it doesn't do anything.

Signed-off-by: Luis de Bethencourt <luisbg@kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-01-23 10:49:03 -08:00
Josh Poimboeuf
e2ac83d74a x86/ftrace: Fix ORC unwinding from ftrace handlers
Steven Rostedt discovered that the ftrace stack tracer is broken when
it's used with the ORC unwinder.  The problem is that objtool is
instructed by the Makefile to ignore the ftrace_64.S code, so it doesn't
generate any ORC data for it.

Fix it by making the asm code objtool-friendly:

- Objtool doesn't like the fact that save_mcount_regs pushes RBP at the
  beginning, but it's never restored (directly, at least).  So just skip
  the original RBP push, which is only needed for frame pointers anyway.

- Annotate some functions as normal callable functions with
  ENTRY/ENDPROC.

- Add an empty unwind hint to return_to_handler().  The return address
  isn't on the stack, so there's nothing ORC can do there.  It will just
  punt in the unlikely case it tries to unwind from that code.

With all that fixed, remove the OBJECT_FILES_NON_STANDARD Makefile
annotation so objtool can read the file.

Link: http://lkml.kernel.org/r/20180123040746.ih4ep3tk4pbjvg7c@treble

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-01-23 13:24:19 -05:00
Benjamin Coddington
0be283f676 SUNRPC: Fix null rpc_clnt dereference in rpc_task_queued tracepoint
Backchannel tasks will not have a reference to the rpc_clnt.  Return -1 for
cl_clid in that case.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trondmy@gmail.com>
2018-01-23 13:18:11 -05:00
Eric W. Biederman
c0f45555b8 signal/memory-failure: Use force_sig_mceerr and send_sig_mceerr
Delegate filling out struct siginfo to functions in kernel/signal.c
to simplify the code.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-01-23 12:17:48 -06:00
Eric W. Biederman
83b57531c5 mm/memory_failure: Remove unused trapno from memory_failure
Today 4 architectures set ARCH_SUPPORTS_MEMORY_FAILURE (arm64, parisc,
powerpc, and x86), while 4 other architectures set __ARCH_SI_TRAPNO
(alpha, metag, sparc, and tile).  These two sets of architectures do
not interesect so remove the trapno paramater to remove confusion.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-01-23 12:17:42 -06:00
Prashant Bhole
783687810e bpf: test_maps: cleanup sockmaps when test ends
Bug: BPF programs and maps related to sockmaps test exist
in memory even after test_maps ends.

This patch fixes it as a short term workaround (sockmap
kernel side needs real fixing) by empyting sockmaps when
test ends.

Fixes: 6f6d33f3b3 ("bpf: selftests add sockmap tests")
Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
[ daniel: Note on workaround. ]
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-23 19:10:09 +01:00
Shannon Nelson
85bc2663a5 ixgbe: register ipsec offload with the xfrm subsystem
With all the support code in place we can now link in the ipsec
offload operations and set the ESP feature flag for the XFRM
subsystem to see.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 10:09:12 -08:00
Shannon Nelson
a8a43fda27 ixgbe: ipsec offload stats
Add a simple statistic to count the ipsec offloads.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 10:07:18 -08:00
Shannon Nelson
5925947047 ixgbe: process the Tx ipsec offload
If the skb has a security association referenced in the skb, then
set up the Tx descriptor with the ipsec offload bits.  While we're
here, we fix an oddly named field in the context descriptor struct.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 10:02:30 -08:00
Shannon Nelson
92103199f1 ixgbe: process the Rx ipsec offload
If the chip sees and decrypts an ipsec offload, set up the skb
sp pointer with the ralated SA info.  Since the chip is rude
enough to keep to itself the table index it used for the
decryption, we have to do our own table lookup, using the
hash for speed.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 09:52:57 -08:00
Alexei Starovoitov
8e6875250a selftests/bpf: fix test_dev_cgroup
The test incorrectly doing
mkdir /mnt/cgroup-test-work-dirtest-bpf-based-device-cgroup
instead of
mkdir /mnt/cgroup-test-work-dir/test-bpf-based-device-cgroup

somehow such mkdir succeeds and new directory appears:
/mnt/cgroup-test-work-dir/cgroup-test-work-dirtest-bpf-based-device-cgroup

Later cleanup via nftw("/mnt/cgroup-test-work-dir", ...);
doesn't walk this directory.
"rmdir /mnt/cgroup-test-work-dir" succeeds, but bpf program and
dangling cgroup stays in memory.
That's a separate issue on a cgroup side.
For now fix the test.

Fixes: 37f1ba0909 ("selftests/bpf: add a test for device cgroup controller")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-23 18:42:12 +01:00
Shannon Nelson
6d73a1540b ixgbe: restore offloaded SAs after a reset
On a chip reset most of the table contents are lost, so must be
restored.  This scans the driver's ipsec tables and restores both
the filled and empty table slots to their pre-reset values.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 09:37:09 -08:00
Alexei Starovoitov
1a97cf1fe5 selftests/bpf: speedup test_maps
test_hashmap_walk takes very long time on debug kernel with kasan on.
Reduce the number of iterations in this test without sacrificing
test coverage.
Also add printfs as progress indicator.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-23 18:28:03 +01:00
Shannon Nelson
63a67fe229 ixgbe: add ipsec offload add and remove SA
Add the functions for setting up and removing offloaded SAs (Security
Associations) with the x540 hardware.  We set up the callback structure
but we don't yet set the hardware feature bit to be sure the XFRM service
won't actually try to use us for an offload yet.

The software tables are made up to mimic the hardware tables to make it
easier to track what's in the hardware, and the SA table index is used
for the XFRM offload handle.  However, there is a hashing field in the
Rx SA tracking that will be used to facilitate faster table searches in
the Rx fast path.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 09:19:02 -08:00
Shannon Nelson
34c822e2fb ixgbe: add ipsec data structures
Set up the data structures to be used by the ipsec offload.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 09:11:27 -08:00
Shannon Nelson
49a94d74d9 ixgbe: add ipsec engine start and stop routines
Add in the code for running and stopping the hardware ipsec
encryption/decryption engine.  It is good to keep the engine
off when not in use in order to save on the power draw.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 09:08:57 -08:00
Shannon Nelson
8bbbc5e90b ixgbe: add ipsec register access routines
Add a few routines to make access to the ipsec registers just a little
easier, and throw in the beginnings of an initialization.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 09:00:18 -08:00
Linus Torvalds
a84a8ab94e Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix divide by zero in mlx5, from Talut Batheesh.

 2) Guard against invalid GSO packets coming from untrusted guests and
    arriving in qdisc_pkt_len_init(), from Eric Dumazet.

 3) Similarly add such protection to the various protocol GSO handlers.
    From Willem de Bruijn.

 4) Fix regression added to IGMP source address checking for IGMPv3
    reports, from Felix Feitkau.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  tls: Correct length of scatterlist in tls_sw_sendpage
  be2net: restore properly promisc mode after queues reconfiguration
  net: igmp: fix source address check for IGMPv3 reports
  gso: validate gso_type in GSO handlers
  net: qdisc_pkt_len_init() should be more robust
  ibmvnic: Allocate and request vpd in init_resources
  ibmvnic: Revert to previous mtu when unsupported value requested
  ibmvnic: Modify buffer size and number of queues on failover
  rds: tcp: compute m_ack_seq as offset from ->write_seq
  usbnet: silence an unnecessary warning
  cxgb4: fix endianness for vlan value in cxgb4_tc_flower
  cxgb4: set filter type to 1 for ETH_P_IPV6
  net/mlx5e: Fix fixpoint divide exception in mlx5e_am_stats_compare
2018-01-23 08:52:55 -08:00
Shannon Nelson
beca815403 ixgbe: clean up ipsec defines
Clean up the ipsec/macsec descriptor bit definitions to match the rest
of the defines and file organization.  Also recognise the bit-definition
overlap in the error mask macro.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-01-23 08:41:25 -08:00
Yonghong Song
35136920e1 tools/bpf: fix a test failure in selftests prog test_verifier
Commit 111e6b4531 ("selftests/bpf: make test_verifier run most programs")
enables tools/testing/selftests/bpf/test_verifier unit cases to run
via bpf_prog_test_run command. With the latest code base,
test_verifier had one test case failure:

  ...
  #473/p check deducing bounds from const, 2 FAIL retval 1 != 0
  0: (b7) r0 = 1
  1: (75) if r0 s>= 0x1 goto pc+1
   R0=inv1 R1=ctx(id=0,off=0,imm=0) R10=fp0,call_-1
  2: (95) exit

  from 1 to 3: R0=inv1 R1=ctx(id=0,off=0,imm=0) R10=fp0,call_-1
  3: (d5) if r0 s<= 0x1 goto pc+1
   R0=inv1 R1=ctx(id=0,off=0,imm=0) R10=fp0,call_-1
  4: (95) exit

  from 3 to 5: R0=inv1 R1=ctx(id=0,off=0,imm=0) R10=fp0,call_-1
  5: (1f) r1 -= r0
  6: (95) exit
  processed 7 insns (limit 131072), stack depth 0
  ...

The test case does not set return value in the test
structure and hence the return value from the prog run
is assumed to be 0. However, the actual return value is 1.
As a result, the test failed. The fix is to correctly set
the return value in the test structure.

Fixes: 111e6b4531 ("selftests/bpf: make test_verifier run most programs")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-23 17:36:09 +01:00
Bart Van Assche
b0780ee56e IB/srp: Add target_can_queue login parameter
Although I'm not sure this parameter is useful for regular SRP users,
setting this parameter to 1 has shown to be invaluable for testing the
block layer core, SCSI core and device mapper queue running mechanisms.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-01-23 11:35:05 -05:00
Bart Van Assche
19f313438c IB/srp: Add RDMA/CM support
Since the SRP_LOGIN_REQ defined in the SRP standard is larger than
what fits in the RDMA/CM login request private data, introduce a new
login request format for the RDMA/CM.

Note: since srp_daemon and ibsrpdm rely on the subnet manager and
since there is no equivalent of the IB subnet manager in non-IB
networks, login has to be performed manually for non-IB networks.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-01-23 11:35:04 -05:00
Bart Van Assche
172856eac7 kobject: Export kobj_ns_grab_current() and kobj_ns_drop()
Make it possible to call these two functions from a kernel module.
Note: despite their name, these two functions can be used meaningfully
independent of kobjects. A later patch will add calls to these
functions from the SRP driver because this patch series modifies the
SRP driver such that it can hold a reference to a namespace that can
last longer than the lifetime of the process through which the
namespace reference was obtained.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-01-23 11:35:04 -05:00
Suzuki K Poulose
55b35d070c arm64: Run enable method for errata work arounds on late CPUs
When a CPU is brought up after we have finalised the system
wide capabilities (i.e, features and errata), we make sure the
new CPU doesn't need a new errata work around which has not been
detected already. However we don't run enable() method on the new
CPU for the errata work arounds already detected. This could
cause the new CPU running without potential work arounds.
It is upto the "enable()" method to decide if this CPU should
do something about the errata.

Fixes: commit 6a6efbb45b ("arm64: Verify CPU errata work arounds on hotplugged CPU")
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Cc: Dave Martin <dave.martin@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-01-23 16:34:37 +00:00
Yonghong Song
2310035fa0 bpf: fix incorrect kmalloc usage in lpm_trie MAP_GET_NEXT_KEY rcu region
In commit b471f2f1de ("bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE map"),
the implemented MAP_GET_NEXT_KEY callback function is guarded with rcu read lock.
In the function body, "kmalloc(size, GFP_USER | __GFP_NOWARN)" is used which may
sleep and violate rcu read lock region requirements. This patch fixed the issue
by using GFP_ATOMIC instead to avoid blocking kmalloc. Tested with
CONFIG_DEBUG_ATOMIC_SLEEP=y as suggested by Eric Dumazet.

Fixes: b471f2f1de ("bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE map")
Signed-off-by: Yonghong Song <yhs@fb.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-01-23 17:33:57 +01:00
Xin Long
f53d77e19b sctp: reset ret in again path in sctp_for_each_transport
Commit 97a6ec4ac0 ("rhashtable: Change rhashtable_walk_start to
return void") only initialized ret for the first time, when going
to again path, the next tsp could be NULL. Without resetting ret,
cb_done would be called with tsp as NULL.

A kernel crash was caused by this when running sctpdiag testcase
in sctp-tests.

Note that this issue doesn't affect net.git yet.

Fixes: 97a6ec4ac0 ("rhashtable: Change rhashtable_walk_start to return void")
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>
2018-01-23 11:22:25 -05:00
Colin Ian King
196709f494 bnx2: remove redundant initializations of pointers txr and rxr
Pointers txr and rxr are being initialized and a few statements later
are being assigned new values without the original values ever being
read. The initialized values are therefore redundant and can be
removed.

Cleans up clang warnings:
drivers/net/ethernet/broadcom/bnx2.c:5821:28: warning: Value stored to
'txr' during its initialization is never read
drivers/net/ethernet/broadcom/bnx2.c:5822:28: warning: Value stored to
'rxr' during its initialization is never read

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-23 11:16:23 -05:00
Zhu Yanjun
a9124ec443 forcedeth: remove duplicate structure member in rx
Since both first_rx_ctx and rx_skb are the head of rx ctx, it not
necessary to use two structure members to statically indicate
the head of rx ctx. So first_rx_ctx is removed.

CC: Srinivas Eeda <srinivas.eeda@oracle.com>
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>
2018-01-23 11:11:41 -05:00
Goldwyn Rodrigues
20d59023c5 block: Set BIO_TRACE_COMPLETION on new bio during split
We inadvertently set it again on the source bio, but we need
to set it on the new split bio instead.

Fixes: fbbaf700e7 ("block: trace completion of all bios.")
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-23 09:10:19 -07:00
David S. Miller
d76632751a Merge branch 'Kernel-doc-fixes-for-networking'
Florian Fainelli says:

====================
Kernel doc fixes for networking

This patch series fixes kernel doc warnings found while running make htmldocs
pertaining to the networking subsystem. There is a finaly set of warnings due
to PHYLINK which I have not been able to resolve yet.

The last patch could thereoteically be applied to 'net' since the commit
referenced by the Fixes: tag is present in v4.15-rcX.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-23 11:06:51 -05:00
Florian Fainelli
7a006d5988 net: core: Fix kernel-doc for netdev_upper_link()
Fixes the following warnings:
./net/core/dev.c:6438: warning: No description found for parameter 'extack'
./net/core/dev.c:6461: warning: No description found for parameter 'extack'

Fixes: 42ab19ee90 ("net: Add extack to upper device linking")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-23 11:06:50 -05:00
Florian Fainelli
5de30d5df9 net: core: Fix kernel-doc for call_netdevice_notifiers_info()
Remove the @dev comment, since we do not have a net_device argument, fixes the
following kernel doc warning: /net/core/dev.c:1707: warning: Excess function
parameter 'dev' description in 'call_netdevice_notifiers_info'

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-23 11:06:50 -05:00
Florian Fainelli
4bb7df7d69 net: phy: sfp: Fix kernel doc warning
We forgot to update the kernel doc header above sfp_register_upstream()

Fixes: c19bb00070 ("sfp: convert to fwnode")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-23 11:06:50 -05:00
Florian Fainelli
9e55e5d30f net: core: Fix kernel-doc for carrier_* attributes
Fix the documentation warning:

include/linux/netdevice.h:1939: warning: Excess struct member 'carrier_changes' description in 'net_device'

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Fixes: b2d3bcfa26 ("net: core: Expose number of link up/down transitions")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-23 11:06:50 -05:00