openwrt/staging/blogic.git
6 years agolibbpf: fix string comparison for guessing eBPF program type
Quentin Monnet [Tue, 16 Jan 2018 23:51:48 +0000 (15:51 -0800)]
libbpf: fix string comparison for guessing eBPF program type

libbpf is able to deduce the type of a program from the name of the ELF
section in which it is located. However, the comparison is made on the
first n characters, n being determined with sizeof() applied to the
reference string (e.g. "xdp"). When such section names are supposed to
receive a suffix separated with a slash (e.g. "kprobe/"), using sizeof()
takes the final NUL character of the reference string into account,
which implies that both strings must be equal. Instead, the desired
behaviour would consist in taking the length of the string, *without*
accounting for the ending NUL character, and to make sure the reference
string is a prefix to the ELF section name.

Subtract 1 to the total size of the string for obtaining the length for
the comparison.

Fixes: 583c90097f72 ("libbpf: add ability to guess program type based on section name")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agotools: bpftool: add -DPACKAGE when including bfd.h
Jiong Wang [Tue, 16 Jan 2018 23:51:47 +0000 (15:51 -0800)]
tools: bpftool: add -DPACKAGE when including bfd.h

bfd.h is requiring including of config.h except when PACKAGE or
PACKAGE_VERSION are defined.

  /* PR 14072: Ensure that config.h is included first.  */
  #if !defined PACKAGE && !defined PACKAGE_VERSION
  #error config.h must be included before this header
  #endif

This check has been introduced since May-2012. It doesn't show up in bfd.h
on some Linux distribution, probably because distributions have remove it
when building the package.

However, sometimes the user might just build libfd from source code then
link bpftool against it. For this case, bfd.h will be original that we need
to define PACKAGE or PACKAGE_VERSION.

Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: annotate bpf_insn_print_t with __printf
Jakub Kicinski [Tue, 16 Jan 2018 23:51:46 +0000 (15:51 -0800)]
bpf: annotate bpf_insn_print_t with __printf

Functions of type bpf_insn_print_t take printf-like format
string, mark the type accordingly.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: offload: make bpf_offload_dev_match() reject host+host case
Jakub Kicinski [Tue, 16 Jan 2018 23:51:45 +0000 (15:51 -0800)]
bpf: offload: make bpf_offload_dev_match() reject host+host case

Daniel suggests it would be more logical for bpf_offload_dev_match()
to return false is either the program or the map are not offloaded,
rather than treating the both not offloaded case as a "matching
CPU/host device".

This makes no functional difference today, since verifier only calls
bpf_offload_dev_match() when one of the objects is offloaded.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agosamples/bpf: Fix trailing semicolon
Luis de Bethencourt [Tue, 16 Jan 2018 14:15:30 +0000 (14:15 +0000)]
samples/bpf: 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: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: cpumap: make some functions static
Wei Yongjun [Tue, 16 Jan 2018 11:27:05 +0000 (11:27 +0000)]
bpf: cpumap: make some functions static

Fixes the following sparse warnings:

kernel/bpf/cpumap.c:146:6: warning:
 symbol '__cpu_map_queue_destructor' was not declared. Should it be static?
kernel/bpf/cpumap.c:225:16: warning:
 symbol 'cpu_map_build_skb' was not declared. Should it be static?
kernel/bpf/cpumap.c:340:26: warning:
 symbol '__cpu_map_entry_alloc' was not declared. Should it be static?
kernel/bpf/cpumap.c:398:6: warning:
 symbol '__cpu_map_entry_free' was not declared. Should it be static?
kernel/bpf/cpumap.c:441:6: warning:
 symbol '__cpu_map_entry_replace' was not declared. Should it be static?
kernel/bpf/cpumap.c:454:5: warning:
 symbol 'cpu_map_delete_elem' was not declared. Should it be static?
kernel/bpf/cpumap.c:467:5: warning:
 symbol 'cpu_map_update_elem' was not declared. Should it be static?
kernel/bpf/cpumap.c:505:6: warning:
 symbol 'cpu_map_free' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpftool: recognize BPF_PROG_TYPE_CGROUP_DEVICE programs
Roman Gushchin [Mon, 15 Jan 2018 19:16:15 +0000 (19:16 +0000)]
bpftool: recognize BPF_PROG_TYPE_CGROUP_DEVICE programs

Bpftool doesn't recognize BPF_PROG_TYPE_CGROUP_DEVICE programs,
so the prog show command prints the numeric type value:

$ bpftool prog show
1: type 15  name bpf_prog1  tag ac9f93dbfd6d9b74
loaded_at Jan 15/07:58  uid 0
xlated 96B  jited 105B  memlock 4096B

This patch defines the corresponding textual representation:

$ bpftool prog show
1: cgroup_device  name bpf_prog1  tag ac9f93dbfd6d9b74
loaded_at Jan 15/07:58  uid 0
xlated 96B  jited 105B  memlock 4096B

Signed-off-by: Roman Gushchin <guro@fb.com>
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: Quentin Monnet <quentin.monnet@netronome.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agoMerge branch 'bpf-nfp-map-offload'
Daniel Borkmann [Sun, 14 Jan 2018 22:36:31 +0000 (23:36 +0100)]
Merge branch 'bpf-nfp-map-offload'

Jakub Kicinski says:

====================
This set adds support for creating maps on networking devices.  BPF is
programs+maps, the pure program offload has been around for quite some
time, this patchset adds the map part of the equation.

Maps are allocated on the target device from the start.  There is no
host copy when map is created on the device.  Device maps are represented
by struct bpf_offloaded_map, regardless of type.  Host programs can't
access such maps, access is only possible from a program also loaded
to the same device and/or via the BPF syscall.

Offloaded programs are currently only allowed to perform lookups,
control plane is responsible for populating the maps.

For brevity only infrastructure and basic NFP patches are included.
Target device reporting, netdevsim and tests will follow up as well as
some further optimizations to the NFP code.

v2:
 - leave out the array maps, we will add them trivially later to avoid
   merge conflicts with ongoing spectere&meltdown mitigations.
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agonfp: bpf: implement bpf map offload
Jakub Kicinski [Fri, 12 Jan 2018 04:29:17 +0000 (20:29 -0800)]
nfp: bpf: implement bpf map offload

Plug in to the stack's map offload callbacks for BPF map offload.
Get next call needs some special handling on the FW side, since
we can't send a NULL pointer to the FW there is a get first entry
FW command.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agonfp: bpf: add support for reading map memory
Jakub Kicinski [Fri, 12 Jan 2018 04:29:16 +0000 (20:29 -0800)]
nfp: bpf: add support for reading map memory

Map memory needs to use 40 bit addressing.  Add handling of such
accesses.  Since 40 bit addresses are formed by using both 32 bit
operands we need to pre-calculate the actual address instead of
adding in the offset inside the instruction, like we did in 32 bit
mode.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agonfp: bpf: add verification and codegen for map lookups
Jakub Kicinski [Fri, 12 Jan 2018 04:29:15 +0000 (20:29 -0800)]
nfp: bpf: add verification and codegen for map lookups

Verify our current constraints on the location of the key are
met and generate the code for calling map lookup on the datapath.

New relocation types have to be added - for helpers and return
addresses.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agonfp: bpf: add helpers for updating immediate instructions
Jakub Kicinski [Fri, 12 Jan 2018 04:29:14 +0000 (20:29 -0800)]
nfp: bpf: add helpers for updating immediate instructions

Immediate loads are used to load the return address of a helper.
We need to be able to update those loads for relocations.
Immediate loads can be slightly more complex and spread over
two instructions in general, but here we only care about simple
loads of small (< 65k) constants, so complex cases are not handled.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agonfp: bpf: parse function call and map capabilities
Jakub Kicinski [Fri, 12 Jan 2018 04:29:13 +0000 (20:29 -0800)]
nfp: bpf: parse function call and map capabilities

Parse helper function and supported map FW TLV capabilities.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agonfp: bpf: implement helpers for FW map ops
Jakub Kicinski [Fri, 12 Jan 2018 04:29:12 +0000 (20:29 -0800)]
nfp: bpf: implement helpers for FW map ops

Implement calls for FW map communication.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agonfp: bpf: add basic control channel communication
Jakub Kicinski [Fri, 12 Jan 2018 04:29:11 +0000 (20:29 -0800)]
nfp: bpf: add basic control channel communication

For map support we will need to send and receive control messages.
Add basic support for sending a message to FW, and waiting for a
reply.

Control messages are tagged with a 16 bit ID.  Add a simple ID
allocator and make sure we don't allow too many messages in flight,
to avoid request <> reply mismatches.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agonfp: bpf: add map data structure
Jakub Kicinski [Fri, 12 Jan 2018 04:29:10 +0000 (20:29 -0800)]
nfp: bpf: add map data structure

To be able to split code into reasonable chunks we need to add
the map data structures already.  Later patches will add code
piece by piece.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: offload: add map offload infrastructure
Jakub Kicinski [Fri, 12 Jan 2018 04:29:09 +0000 (20:29 -0800)]
bpf: offload: add map offload infrastructure

BPF map offload follow similar path to program offload.  At creation
time users may specify ifindex of the device on which they want to
create the map.  Map will be validated by the kernel's
.map_alloc_check callback and device driver will be called for the
actual allocation.  Map will have an empty set of operations
associated with it (save for alloc and free callbacks).  The real
device callbacks are kept in map->offload->dev_ops because they
have slightly different signatures.  Map operations are called in
process context so the driver may communicate with HW freely,
msleep(), wait() etc.

Map alloc and free callbacks are muxed via existing .ndo_bpf, and
are always called with rtnl lock held.  Maps and programs are
guaranteed to be destroyed before .ndo_uninit (i.e. before
unregister_netdev() returns).  Map callbacks are invoked with
bpf_devs_lock *read* locked, drivers must take care of exclusive
locking if necessary.

All offload-specific branches are marked with unlikely() (through
bpf_map_is_dev_bound()), given that branch penalty will be
negligible compared to IO anyway, and we don't want to penalize
SW path unnecessarily.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: offload: factor out netdev checking at allocation time
Jakub Kicinski [Fri, 12 Jan 2018 04:29:08 +0000 (20:29 -0800)]
bpf: offload: factor out netdev checking at allocation time

Add a helper to check if netdev could be found and whether it
has .ndo_bpf callback.  There is no need to check the callback
every time it's invoked, ndos can't reasonably be swapped for
a set without .ndp_bpf while program is loaded.

bpf_dev_offload_check() will also be used by map offload.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: rename bpf_dev_offload -> bpf_prog_offload
Jakub Kicinski [Fri, 12 Jan 2018 04:29:07 +0000 (20:29 -0800)]
bpf: rename bpf_dev_offload -> bpf_prog_offload

With map offload coming, we need to call program offload structure
something less ambiguous.  Pure rename, no functional changes.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: add helper for copying attrs to struct bpf_map
Jakub Kicinski [Fri, 12 Jan 2018 04:29:06 +0000 (20:29 -0800)]
bpf: add helper for copying attrs to struct bpf_map

All map types reimplement the field-by-field copy of union bpf_attr
members into struct bpf_map.  Add a helper to perform this operation.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: hashtab: move checks out of alloc function
Jakub Kicinski [Fri, 12 Jan 2018 04:29:05 +0000 (20:29 -0800)]
bpf: hashtab: move checks out of alloc function

Use the new callback to perform allocation checks for hash maps.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: hashtab: move attribute validation before allocation
Jakub Kicinski [Fri, 12 Jan 2018 04:29:04 +0000 (20:29 -0800)]
bpf: hashtab: move attribute validation before allocation

Number of attribute checks are currently performed after hashtab
is already allocated.  Move them to be able to split them out to
the check function later on.  Checks have to now be performed on
the attr union directly instead of the members of bpf_map, since
bpf_map will be allocated later.  No functional changes.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agobpf: add map_alloc_check callback
Jakub Kicinski [Fri, 12 Jan 2018 04:29:03 +0000 (20:29 -0800)]
bpf: add map_alloc_check callback

.map_alloc callbacks contain a number of checks validating user-
-provided map attributes against constraints of a particular map
type.  For offloaded maps we will need to check map attributes
without actually allocating any memory on the host.  Add a new
callback for validating attributes before any memory is allocated.
This callback can be selectively implemented by map types for
sharing code with offloads, or simply to separate the logical
steps of validation and allocation.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agoMerge branch 'error-injection'
Alexei Starovoitov [Sat, 13 Jan 2018 01:33:39 +0000 (17:33 -0800)]
Merge branch 'error-injection'

Masami Hiramatsu says:

====================
Here are the 5th version of patches to moving error injection
table from kprobes. This version fixes a bug and update
fail-function to support multiple function error injection.

Here is the previous version:

https://patchwork.ozlabs.org/cover/858663/

Changes in v5:
 - [3/5] Fix a bug that within_error_injection returns false always.
 - [5/5] Update to support multiple function error injection.

Thank you,
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
6 years agoerror-injection: Support fault injection framework
Masami Hiramatsu [Fri, 12 Jan 2018 17:56:03 +0000 (02:56 +0900)]
error-injection: Support fault injection framework

Support in-kernel fault-injection framework via debugfs.
This allows you to inject a conditional error to specified
function using debugfs interfaces.

Here is the result of test script described in
Documentation/fault-injection/fault-injection.txt

  ===========
  # ./test_fail_function.sh
  1+0 records in
  1+0 records out
  1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.0227404 s, 46.1 MB/s
  btrfs-progs v4.4
  See http://btrfs.wiki.kernel.org for more information.

  Label:              (null)
  UUID:               bfa96010-12e9-4360-aed0-42eec7af5798
  Node size:          16384
  Sector size:        4096
  Filesystem size:    1001.00MiB
  Block group profiles:
    Data:             single            8.00MiB
    Metadata:         DUP              58.00MiB
    System:           DUP              12.00MiB
  SSD detected:       no
  Incompat features:  extref, skinny-metadata
  Number of devices:  1
  Devices:
     ID        SIZE  PATH
      1  1001.00MiB  /dev/loop2

  mount: mount /dev/loop2 on /opt/tmpmnt failed: Cannot allocate memory
  SUCCESS!
  ===========

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
6 years agoerror-injection: Add injectable error types
Masami Hiramatsu [Fri, 12 Jan 2018 17:55:33 +0000 (02:55 +0900)]
error-injection: Add injectable error types

Add injectable error types for each error-injectable function.

One motivation of error injection test is to find software flaws,
mistakes or mis-handlings of expectable errors. If we find such
flaws by the test, that is a program bug, so we need to fix it.

But if the tester miss input the error (e.g. just return success
code without processing anything), it causes unexpected behavior
even if the caller is correctly programmed to handle any errors.
That is not what we want to test by error injection.

To clarify what type of errors the caller must expect for each
injectable function, this introduces injectable error types:

 - EI_ETYPE_NULL : means the function will return NULL if it
    fails. No ERR_PTR, just a NULL.
 - EI_ETYPE_ERRNO : means the function will return -ERRNO
    if it fails.
 - EI_ETYPE_ERRNO_NULL : means the function will return -ERRNO
       (ERR_PTR) or NULL.

ALLOW_ERROR_INJECTION() macro is expanded to get one of
NULL, ERRNO, ERRNO_NULL to record the error type for
each function. e.g.

 ALLOW_ERROR_INJECTION(open_ctree, ERRNO)

This error types are shown in debugfs as below.

  ====
  / # cat /sys/kernel/debug/error_injection/list
  open_ctree [btrfs] ERRNO
  io_ctl_init [btrfs] ERRNO
  ====

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
6 years agoerror-injection: Separate error-injection from kprobe
Masami Hiramatsu [Fri, 12 Jan 2018 17:55:03 +0000 (02:55 +0900)]
error-injection: Separate error-injection from kprobe

Since error-injection framework is not limited to be used
by kprobes, nor bpf. Other kernel subsystems can use it
freely for checking safeness of error-injection, e.g.
livepatch, ftrace etc.
So this separate error-injection framework from kprobes.

Some differences has been made:

- "kprobe" word is removed from any APIs/structures.
- BPF_ALLOW_ERROR_INJECTION() is renamed to
  ALLOW_ERROR_INJECTION() since it is not limited for BPF too.
- CONFIG_FUNCTION_ERROR_INJECTION is the config item of this
  feature. It is automatically enabled if the arch supports
  error injection feature for kprobe or ftrace etc.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
6 years agotracing/kprobe: bpf: Compare instruction pointer with original one
Masami Hiramatsu [Fri, 12 Jan 2018 17:54:33 +0000 (02:54 +0900)]
tracing/kprobe: bpf: Compare instruction pointer with original one

Compare instruction pointer with original one on the
stack instead using per-cpu bpf_kprobe_override flag.

This patch also consolidates reset_current_kprobe() and
preempt_enable_no_resched() blocks. Those can be done
in one place.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
6 years agotracing/kprobe: bpf: Check error injectable event is on function entry
Masami Hiramatsu [Fri, 12 Jan 2018 17:54:04 +0000 (02:54 +0900)]
tracing/kprobe: bpf: Check error injectable event is on function entry

Check whether error injectable event is on function entry or not.
Currently it checks the event is ftrace-based kprobes or not,
but that is wrong. It should check if the event is on the entry
of target function. Since error injection will override a function
to just return with modified return value, that operation must
be done before the target function starts making stackframe.

As a side effect, bpf error injection is no need to depend on
function-tracer. It can work with sw-breakpoint based kprobe
events too.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
6 years agobpf: simplify xdp_convert_ctx_access for xdp_rxq_info
Jesper Dangaard Brouer [Thu, 11 Jan 2018 16:39:09 +0000 (17:39 +0100)]
bpf: simplify xdp_convert_ctx_access for xdp_rxq_info

As pointed out by Daniel Borkmann, using bpf_target_off() is not
necessary for xdp_rxq_info when extracting queue_index and
ifindex, as these members are u32 like BPF_W.

Also fix trivial spelling mistake introduced in same commit.

Fixes: 02dd3291b2f0 ("bpf: finally expose xdp_rxq_info to XDP bpf-programs")
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agoMerge branch 'hns3-add-some-new-features-and-fix-some-bugs'
David S. Miller [Fri, 12 Jan 2018 15:12:33 +0000 (10:12 -0500)]
Merge branch 'hns3-add-some-new-features-and-fix-some-bugs'

Peng Li says:

====================
hns3: add some new features and fix some bugs

This patchset adds 3 ethtool features: get_channels,
get_coalesce and get_coalesce, and fix some bugs.

[patch 1/11] adds ethtool_ops.get_channels (ethtool -l) support
for VF.

[patch 2/11] removes TSO config command from VF driver,
as only main PF can config TSO MSS length according to
hardware.

[patch 3/11 - 4/11] add ethtool_ops {get|set}_coalesce
(ethtool -c/-C) support to PF.
[patch 5/11 - 9/11] fix some bugs related to {get|set}_coalesce.

[patch 10/11 - 11/11] fix the features handling in
hns3_nic_set_features(). Local variable "changed" was defined
to indicates features changed, but was used only for feature
NETIF_F_HW_VLAN_CTAG_RX. Add checking to improve the reliability.

---
Change log:
V1 -> V2:
1, Rewrite the cover letter requested by David Miller.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: check for NULL function pointer in hns3_nic_set_features
Jian Shen [Fri, 12 Jan 2018 08:23:17 +0000 (16:23 +0800)]
net: hns3: check for NULL function pointer in hns3_nic_set_features

It's necessary to check hook whether being defined before
calling, improve the reliability.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: add feature check when feature changed
Jian Shen [Fri, 12 Jan 2018 08:23:16 +0000 (16:23 +0800)]
net: hns3: add feature check when feature changed

Local variable "changed" was defined to indicates features changed,
but was used only for feature NETIF_F_HW_VLAN_CTAG_RX. Add checking
for other features.

Fixes: 052ece6dc19c ("net: hns3: add ethtool related offload command")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: add int_gl_idx setup for TX and RX queues
Fuyun Liang [Fri, 12 Jan 2018 08:23:15 +0000 (16:23 +0800)]
net: hns3: add int_gl_idx setup for TX and RX queues

If the int_gl_idx does not be set, the default interrupt coalesce index
is 0. The TX queues and the RX queues will both use the GL0 as the
interrupt coalesce GL switch. But it should be GL1 for TX queues and GL0
for RX queues.

This patch adds the int_gl_idx setup for TX queues and RX queues.

Fixes: 76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: change the unit of GL value macro
Fuyun Liang [Fri, 12 Jan 2018 08:23:14 +0000 (16:23 +0800)]
net: hns3: change the unit of GL value macro

Previously, driver used 2us as the GL unit. The time unit ethtool
command "-c" and "-C" use is 1us, so now the GL unit driver uses
actually is 1us.

This patch changes the unit of GL value macro from
2us to 1us.

Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: remove unused GL setup function
Fuyun Liang [Fri, 12 Jan 2018 08:23:13 +0000 (16:23 +0800)]
net: hns3: remove unused GL setup function

Since the TX GL and the RX GL need to be set separately,
hns3_set_vector_coalesc_gl() has been replaced with
hns3_set_vector_coalesce_rx_gl() and hns3_set_vector_coalesce_tx_gl().

This patch removes hns3_set_vector_coalesc_gl().

Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: refactor GL update function
Fuyun Liang [Fri, 12 Jan 2018 08:23:12 +0000 (16:23 +0800)]
net: hns3: refactor GL update function

The GL update function uses the max GL value between tx_int_gl and
rx_int_gl to set both new tx_int_gl and new rx_int_gl. Therefore, User
can not enable TX GL self-adaptive or RX GL self-adaptive individually.

This patch refactors the code to update the TX GL and the RX GL
separately, making user can enable TX GL self-adaptive or RX GL
self-adaptive individually.

Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: refactor interrupt coalescing init function
Fuyun Liang [Fri, 12 Jan 2018 08:23:11 +0000 (16:23 +0800)]
net: hns3: refactor interrupt coalescing init function

In the hardware, the coalesce configurable registers include GL0, GL1,
GL2. In the driver, the TX queues use the register GL1 and the RX queues
use the register GL0. This function initializes the configuration of the
interrupt coalescing, but does not distinguish between the TX direction
and the RX direction. It will cause some confusion.

This patch refactors the function to initialize the TX GL and the RX GL
separately. And the initialization of related variables also is added to
this patch.

Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: add ethtool_ops.set_coalesce support to PF
Fuyun Liang [Fri, 12 Jan 2018 08:23:10 +0000 (16:23 +0800)]
net: hns3: add ethtool_ops.set_coalesce support to PF

This patch adds ethtool_ops.set_coalesce support to PF.

Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: add ethtool_ops.get_coalesce support to PF
Fuyun Liang [Fri, 12 Jan 2018 08:23:09 +0000 (16:23 +0800)]
net: hns3: add ethtool_ops.get_coalesce support to PF

This patch adds ethtool_ops.get_coalesce support to PF.

Whilst our hardware supports per queue values, external interfaces
support only a single shared value. As such we use the values for
queue 0.

Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: remove TSO config command from VF driver
Peng Li [Fri, 12 Jan 2018 08:23:08 +0000 (16:23 +0800)]
net: hns3: remove TSO config command from VF driver

Only main PF can config TSO MSS length according to hardware.
This patch removes TSO config command from VF driver.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: hns3: add ethtool_ops.get_channels support for VF
Peng Li [Fri, 12 Jan 2018 08:23:07 +0000 (16:23 +0800)]
net: hns3: add ethtool_ops.get_channels support for VF

This patch supports the ethtool's get_channels() for VF.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
David S. Miller [Fri, 12 Jan 2018 02:27:54 +0000 (21:27 -0500)]
Merge git://git./linux/kernel/git/davem/net

BPF alignment tests got a conflict because the registers
are output as Rn_w instead of just Rn in net-next, and
in net a fixup for a testcase prohibits logical operations
on pointers before using them.

Also, we should attempt to patch BPF call args if JIT always on is
enabled.  Instead, if we fail to JIT the subprogs we should pass
an error back up and fail immediately.

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge tag 'ceph-for-4.15-rc8' of git://github.com/ceph/ceph-client
Linus Torvalds [Fri, 12 Jan 2018 00:57:32 +0000 (16:57 -0800)]
Merge tag 'ceph-for-4.15-rc8' of git://github.com/ceph/ceph-client

Pull ceph fixes from Ilya Dryomov:
 "Two rbd fixes for 4.12 and 4.2 issues respectively, marked for
  stable"

* tag 'ceph-for-4.15-rc8' of git://github.com/ceph/ceph-client:
  rbd: set max_segments to USHRT_MAX
  rbd: reacquire lock should update lock owner client id

6 years agoMerge tag 'gpio-v4.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Fri, 12 Jan 2018 00:54:35 +0000 (16:54 -0800)]
Merge tag 'gpio-v4.15-4' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fix from Linus Walleij:
 "Fix a raw vs elaborate GPIO descriptor bug introduced by yours truly"

* tag 'gpio-v4.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: Add missing open drain/source handling to gpiod_set_value_cansleep()

6 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
David S. Miller [Thu, 11 Jan 2018 18:59:41 +0000 (13:59 -0500)]
Merge git://git./linux/kernel/git/bpf/bpf-next

Daniel Borkmann says:

====================
pull-request: bpf-next 2018-01-11

The following pull-request contains BPF updates for your *net-next* tree.

The main changes are:

1) Various BPF related improvements and fixes to nfp driver: i) do
   not register XDP RXQ structure to control queues, ii) round up
   program stack size to word size for nfp, iii) restrict MTU changes
   when BPF offload is active, iv) add more fully featured relocation
   support to JIT, v) add support for signed compare instructions to
   the nfp JIT, vi) export and reuse verfier log routine for nfp, and
   many more, from Jakub, Quentin and Nic.

2) Fix a syzkaller reported GPF in BPF's copy_verifier_state() when
   we hit kmalloc failure path, from Alexei.

3) Add two follow-up fixes for the recent XDP RXQ series: i) kvzalloc()
   allocated memory was only kfree()'ed, and ii) fix a memory leak where
   RX queue was not freed in netif_free_rx_queues(), from Jakub.

4) Add a sample for transferring XDP meta data into the skb, here it
   is used for setting skb->mark with the buffer from XDP, from Jesper.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
David S. Miller [Thu, 11 Jan 2018 18:58:36 +0000 (13:58 -0500)]
Merge branch 'for-upstream' of git://git./linux/kernel/git/bluetooth/bluetooth-next

Johan Hedberg says:

====================
pull request: bluetooth-next 2018-01-11

Here's likely the last bluetooth-next pull request for the 4.16 kernel.

 - Added support for Bluetooth on 2015+ MacBook (Pro)
 - Fix to QCA Rome suspend/resume handling
 - Two new QCA_ROME USB IDs in btusb
 - A few other minor fixes

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: phy: mdio-bcm-unimac: fix potential NULL dereference in unimac_mdio_probe()
Wei Yongjun [Thu, 11 Jan 2018 11:21:51 +0000 (11:21 +0000)]
net: phy: mdio-bcm-unimac: fix potential NULL dereference in unimac_mdio_probe()

platform_get_resource() may fail and return NULL, so we should
better check it's return value to avoid a NULL pointer dereference
a bit later in the code.

This is detected by Coccinelle semantic patch.

@@
expression pdev, res, n, t, e, e1, e2;
@@

res = platform_get_resource(pdev, t, n);
+ if (!res)
+   return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: socionext: Fix error return code in netsec_netdev_open()
Wei Yongjun [Thu, 11 Jan 2018 11:21:38 +0000 (11:21 +0000)]
net: socionext: Fix error return code in netsec_netdev_open()

Fix to return error code -ENODEV from the of_phy_connect() error
handling case instead of 0, as done elsewhere in this function.

Fixes: 533dd11a12f6 ("net: socionext: Add Synquacer NetSec driver")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: socionext: include linux/io.h to fix build
Arnd Bergmann [Thu, 11 Jan 2018 10:36:24 +0000 (11:36 +0100)]
net: socionext: include linux/io.h to fix build

I ran into a randconfig build failure:

drivers/net/ethernet/socionext/netsec.c: In function 'netsec_probe':
drivers/net/ethernet/socionext/netsec.c:1583:17: error: implicit declaration of function 'devm_ioremap'; did you mean 'ioremap'? [-Werror=implicit-function-declaration]

Including linux/io.h directly fixes this.

Fixes: 533dd11a12f6 ("net: socionext: Add Synquacer NetSec driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next...
David S. Miller [Thu, 11 Jan 2018 16:59:44 +0000 (11:59 -0500)]
Merge branch '40GbE' of git://git./linux/kernel/git/jkirsher/next-queue

Jeff Kirsher says:

====================
40GbE Intel Wired LAN Driver Updates 2018-01-10

This series contains updates to i40e and i40evf only.

Alice adds the displaying of priority xon/xoff packet stats, since we
were already keeping track of them.  Based on the recent changes, bump
the driver versions.

Jake changes how the driver determines whether or not the device is
currently up to resolve the possible issue of freeing data structures
and other memory before they have been fully allocated.  Refactored
the driver to simplify the locking behavior and to consistently use
spinlocks instead of an overloaded bit lock to protect MAC and filter
lists.  Created a helper function which can convert the AdminQ link
speed definition into a virtchnl definition.

Colin Ian King cleans up a redundant variable initialization.

Alex cleans up the driver to stop clearing the pending bit array for
each vector manually, since it is prone to dropping an interrupt and
based on the hardware specs, the pending bit array will be cleared
automatically in MSI-X mode.  Cleaned up flags for promiscuous mode to
resolve an issue where enabling & disabling promiscuous mode on a VF
would leave us in a high polling rate for the adminq task.  Cleaned up
code that was prone to race issues.

Jingjing renames pipeline personalization profile (ppp) to dynamic
device personalization (ddp) because it was being confused with the
well known point to point protocol.  Also removed checks for "track_id"
being zero, since it is valid for it to be zero for profiles that do
not have any 'write' commands.

v2: cleaned up commit message for patch 12 based on feedback from Sergei
    Shtylyov and Alex Duyck
v3: dropped patch 15 from the original series while Mariusz Stachura
    works on the changes that Jakub Kicinski has suggested
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoibmvnic: Don't handle RX interrupts when not up.
Nathan Fontenot [Wed, 10 Jan 2018 16:40:09 +0000 (10:40 -0600)]
ibmvnic: Don't handle RX interrupts when not up.

Initiating a kdump via the command line can cause a pending interrupt
to be handled by the ibmvnic driver when initializing the sub-CRQ
irqs during driver initialization.

NIP [d000000000ca34f0] ibmvnic_interrupt_rx+0x40/0xd0 [ibmvnic]
LR [c000000008132ef0] __handle_irq_event_percpu+0xa0/0x2f0
Call Trace:
[c000000047fcfde0] [c000000008132ef0] __handle_irq_event_percpu+0xa0/0x2f0
[c000000047fcfea0] [c00000000813317c] handle_irq_event_percpu+0x3c/0x90
[c000000047fcfee0] [c00000000813323c] handle_irq_event+0x6c/0xd0
[c000000047fcff10] [c0000000081385e0] handle_fasteoi_irq+0xf0/0x250
[c000000047fcff40] [c0000000081320a0] generic_handle_irq+0x50/0x80
[c000000047fcff60] [c000000008014984] __do_irq+0x84/0x1d0
[c000000047fcff90] [c000000008027564] call_do_irq+0x14/0x24
[c00000003c92af00] [c000000008014b70] do_IRQ+0xa0/0x120
[c00000003c92af50] [c000000008002594] hardware_interrupt_common+0x114/0x180

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agocxgb4: implement ndo_features_check
Ganesh Goudar [Wed, 10 Jan 2018 12:45:47 +0000 (18:15 +0530)]
cxgb4: implement ndo_features_check

Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agocxgb4: add support for vxlan segmentation offload
Ganesh Goudar [Wed, 10 Jan 2018 12:45:26 +0000 (18:15 +0530)]
cxgb4: add support for vxlan segmentation offload

add changes to t4_eth_xmit to enable vxlan segmentation
offload support.

Original work by: Santosh Rastapur <santosh@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agocxgb4: implement udp tunnel callbacks
Ganesh Goudar [Wed, 10 Jan 2018 12:45:08 +0000 (18:15 +0530)]
cxgb4: implement udp tunnel callbacks

Implement ndo_udp_tunnel_add and ndo_udp_tunnel_del
to support vxlan tunnelling.

Original work by: Santosh Rastapur <santosh@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agocxgb4: add data structures to support vxlan
Ganesh Goudar [Wed, 10 Jan 2018 12:44:49 +0000 (18:14 +0530)]
cxgb4: add data structures to support vxlan

Add data structures and macros to be used in vxlan
offload.

Original work by: Santosh Rastapur <santosh@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Thu, 11 Jan 2018 01:55:42 +0000 (17:55 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull vfs regression fix from Al Viro/

Fix a leak in socket() introduced by commit 8e1611e23579 ("make
sock_alloc_file() do sock_release() on failures").

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  Fix a leak in socket(2) when we fail to allocate a file descriptor.

6 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 11 Jan 2018 01:53:18 +0000 (17:53 -0800)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) BPF speculation prevention and BPF_JIT_ALWAYS_ON, from Alexei
    Starovoitov.

 2) Revert dev_get_random_name() changes as adjust the error code
    returns seen by userspace definitely breaks stuff.

 3) Fix TX DMA map/unmap on older iwlwifi devices, from Emmanuel
    Grumbach.

 4) From wrong AF family when requesting sock diag modules, from Andrii
    Vladyka.

 5) Don't add new ipv6 routes attached to the null_entry, from Wei Wang.

 6) Some SCTP sockopt length fixes from Marcelo Ricardo Leitner.

 7) Don't leak when removing VLAN ID 0, from Cong Wang.

 8) Hey there's a potential leak in ipv6_make_skb() too, from Eric
    Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (27 commits)
  ipv6: sr: fix TLVs not being copied using setsockopt
  ipv6: fix possible mem leaks in ipv6_make_skb()
  mlxsw: spectrum_qdisc: Don't use variable array in mlxsw_sp_tclass_congestion_enable
  mlxsw: pci: Wait after reset before accessing HW
  nfp: always unmask aux interrupts at init
  8021q: fix a memory leak for VLAN 0 device
  of_mdio: avoid MDIO bus removal when a PHY is missing
  caif_usb: use strlcpy() instead of strncpy()
  doc: clarification about setting SO_ZEROCOPY
  net: gianfar_ptp: move set_fipers() to spinlock protecting area
  sctp: make use of pre-calculated len
  sctp: add a ceiling to optlen in some sockopts
  sctp: GFP_ATOMIC is not needed in sctp_setsockopt_events
  bpf: introduce BPF_JIT_ALWAYS_ON config
  bpf: avoid false sharing of map refcount with max_entries
  ipv6: remove null_entry before adding default route
  SolutionEngine771x: add Ether TSU resource
  SolutionEngine771x: fix Ether platform data
  docs-rst: networking: wire up msg_zerocopy
  net: ipv4: emulate READ_ONCE() on ->hdrincl bit-field in raw_sendmsg()
  ...

6 years agosamples/bpf: xdp2skb_meta shows transferring info from XDP to SKB
Jesper Dangaard Brouer [Wed, 10 Jan 2018 17:21:44 +0000 (18:21 +0100)]
samples/bpf: xdp2skb_meta shows transferring info from XDP to SKB

Creating a bpf sample that shows howto use the XDP 'data_meta'
infrastructure, created by Daniel Borkmann.  Very few drivers support
this feature, but I wanted a functional sample to begin with, when
working on adding driver support.

XDP data_meta is about creating a communication channel between BPF
programs.  This can be XDP tail-progs, but also other SKB based BPF
hooks, like in this case the TC clsact hook. In this sample I show
that XDP can store info named "mark", and TC/clsact chooses to use
this info and store it into the skb->mark.

It is a bit annoying that XDP and TC samples uses different tools/libs
when attaching their BPF hooks.  As the XDP and TC programs need to
cooperate and agree on a struct-layout, it is best/easiest if the two
programs can be contained within the same BPF restricted-C file.

As the bpf-loader, I choose to not use bpf_load.c (or libbpf), but
instead wrote a bash shell scripted named xdp2skb_meta.sh, which
demonstrate howto use the iproute cmdline tools 'tc' and 'ip' for
loading BPF programs.  To make it easy for first time users, the shell
script have command line parsing, and support --verbose and --dry-run
mode, if you just want to see/learn the tc+ip command syntax:

 # ./xdp2skb_meta.sh --dev ixgbe2 --dry-run
 # Dry-run mode: enable VERBOSE and don't call TC+IP
 tc qdisc del dev ixgbe2 clsact
 tc qdisc add dev ixgbe2 clsact
 tc filter add dev ixgbe2 ingress prio 1 handle 1 bpf da obj ./xdp2skb_meta_kern.o sec tc_mark
 # Flush XDP on device: ixgbe2
 ip link set dev ixgbe2 xdp off
 ip link set dev ixgbe2 xdp obj ./xdp2skb_meta_kern.o sec xdp_mark

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
6 years agoFix a leak in socket(2) when we fail to allocate a file descriptor.
Al Viro [Wed, 10 Jan 2018 23:47:05 +0000 (18:47 -0500)]
Fix a leak in socket(2) when we fail to allocate a file descriptor.

Got broken by "make sock_alloc_file() do sock_release() on failures" -
cleanup after sock_map_fd() failure got pulled all the way into
sock_alloc_file(), but it used to serve the case when sock_map_fd()
failed *before* getting to sock_alloc_file() as well, and that got
lost.  Trivial to fix, fortunately.

Fixes: 8e1611e23579 (make sock_alloc_file() do sock_release() on failures)
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
6 years agoMerge branch 'sfc-support-25G-configuration-with-ethtool'
David S. Miller [Wed, 10 Jan 2018 21:23:39 +0000 (16:23 -0500)]
Merge branch 'sfc-support-25G-configuration-with-ethtool'

Edward Cree says:

====================
sfc: support 25G configuration with ethtool

Adds support for advertise bits beyond the 32-bit legacy masks, and plumbs in
 translation of the new 25/50/100G bits to/from MCDI.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agosfc: add bits for 25/50/100G supported/advertised speeds
Edward Cree [Wed, 10 Jan 2018 18:00:25 +0000 (18:00 +0000)]
sfc: add bits for 25/50/100G supported/advertised speeds

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agosfc: support the ethtool ksettings API properly so that 25/50/100G works
Edward Cree [Wed, 10 Jan 2018 18:00:14 +0000 (18:00 +0000)]
sfc: support the ethtool ksettings API properly so that 25/50/100G works

Store and handle ethtool link mode masks within the driver instead of
 just a single u32.  However, quite a significant amount of existing code
 wants to manipulate the masks directly, and thus now uses the first
 unsigned long (i.e. mask[0]) as though it were a legacy u32 mask.  This
 is ok because all the bits that code is interested in are in the first
 32 bits of the mask; but it might be a good idea to change them in
 future to use the proper bitmap API.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agosfc: basic MCDI mapping of 25/50/100G link speeds
Edward Cree [Wed, 10 Jan 2018 17:59:59 +0000 (17:59 +0000)]
sfc: basic MCDI mapping of 25/50/100G link speeds

Only handles direct speed setting, not autoneg, because the driver is
 still trying to pretend it uses the legacy ethtool API which doesn't
 have advertised/supported bits for 25/50/100G.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge branch 'mlxsw-qdisc-refactoring'
David S. Miller [Wed, 10 Jan 2018 21:07:42 +0000 (16:07 -0500)]
Merge branch 'mlxsw-qdisc-refactoring'

Jiri Pirko says:

====================
mlxsw qdisc refactoring

This patchset refactors the qdisc handling in mlxsw driver in order to make
it more object oriented like.
It helps readability, laying the groundwork for the offloading of
additional qdiscs by the driver
This patchset also makes the qdiscs statistics more generic.

Patch 1 moves the qdiscs declaration to the spectrum_qdisc.c
Patches 2-3 clean the offloaded stats requests. Patch 2 changes the RED
generic stats struct to be sharable by other offloaded qdiscs. Patch 3
changes the xstats request to be like the stats. Note that these patches
are outside the driver scope.
Patches 4-5 clean the statistics related functions and structs within the
driver.
Patches 6-7 decrease the need for the same parameters to be sent to many
functions.
Patches 8-11 create a functions pointers struct, to make the qdiscs
handling more object oriented like.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: qdiscs: Remove qdisc before setting a new one
Nogah Frankel [Wed, 10 Jan 2018 14:00:07 +0000 (15:00 +0100)]
mlxsw: spectrum: qdiscs: Remove qdisc before setting a new one

If a qdisc is being replaced by another qdisc of the same type, it can
simply override over its configuration.
However, if it replaces a qdisc of another type, it needs to be removed
before setting the new qdisc.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: qdiscs: Create a generic replace function
Nogah Frankel [Wed, 10 Jan 2018 14:00:06 +0000 (15:00 +0100)]
mlxsw: spectrum: qdiscs: Create a generic replace function

Create a generic qdisc replace function.
For that goal, add three functions to the qdisc ops struct:
* check_params: Checks if the given parameters are offloadable.
* replace: Offload the given parameters.
* clean_stats: clean the qdisc stats for the offloaded qdisc.
integrate RED offloading into using the new internal replace API.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: qdiscs: Create a generic destroy function
Nogah Frankel [Wed, 10 Jan 2018 14:00:05 +0000 (15:00 +0100)]
mlxsw: spectrum: qdiscs: Create a generic destroy function

Add a destroy function to the qdiscs ops struct.
Create a generic qdisc destroy function, that clears the qdisc metadata as
well as calling the specific qdisc destroy function.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: qdiscs: Add an ops struct
Nogah Frankel [Wed, 10 Jan 2018 14:00:04 +0000 (15:00 +0100)]
mlxsw: spectrum: qdiscs: Add an ops struct

Qdisc struct have the Qdisc_class_ops struct.
This patch introduces the similar ops struct for the mlxsw_sp_qdisc_ops
struct. It allows better readability as well as code reusability for the
common parts of some functions like destroy.
The first operations to be added are the statistics getters.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: qdiscs: Unite all handle checks
Nogah Frankel [Wed, 10 Jan 2018 14:00:03 +0000 (15:00 +0100)]
mlxsw: spectrum: qdiscs: Unite all handle checks

Every qdisc op gets the qdisc handle ID as well as its location.  Each one
of them, beside replace, checks if the handle doesn't match the qdisc in
the given location, and if so, it returns without running the actual op.
Unite these checks to one comparison function and avoid sending the handle
id to these ops.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: qdiscs: Add tclass number to the mlxsw_sp_qdisc
Nogah Frankel [Wed, 10 Jan 2018 14:00:02 +0000 (15:00 +0100)]
mlxsw: spectrum: qdiscs: Add tclass number to the mlxsw_sp_qdisc

Tclass number is needed for most of the operations related to the qdisc in
the driver. Create a field for it in the mlxsw_sp_qdisc instead of passing
it to every function as parameter.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: qdiscs: Make the clean stats function to be for RED only
Nogah Frankel [Wed, 10 Jan 2018 14:00:01 +0000 (15:00 +0100)]
mlxsw: spectrum: qdiscs: Make the clean stats function to be for RED only

Improve readability by changing the clean stats function to handle only
RED. Qdiscs that will be offloaded in the future will have a clean stats
function of their own.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: qdiscs: Clean qdisc statistics structs
Nogah Frankel [Wed, 10 Jan 2018 14:00:00 +0000 (15:00 +0100)]
mlxsw: spectrum: qdiscs: Clean qdisc statistics structs

Clean RED offloaded stats and make them more generic by breaking the
generic qdisc stats to a struct of their own.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: sch: red: Change offloaded xstats to be incremental
Nogah Frankel [Wed, 10 Jan 2018 13:59:59 +0000 (14:59 +0100)]
net: sch: red: Change offloaded xstats to be incremental

Change the value of the xstats requested from the driver for offloaded RED
to be incremental, like the normal stats.
It increases consistency - if a qdisc stops being offloaded its xstats
don't change.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet: sch: red: Change the name of the stats struct to be generic
Nogah Frankel [Wed, 10 Jan 2018 13:59:58 +0000 (14:59 +0100)]
net: sch: red: Change the name of the stats struct to be generic

Change the name of the stats struct to be generic, so it could be used for
other qdisc offload, that will be added in the next patches.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: qdiscs: Move qdisc's declarations to its designated file
Nogah Frankel [Wed, 10 Jan 2018 13:59:57 +0000 (14:59 +0100)]
mlxsw: spectrum: qdiscs: Move qdisc's declarations to its designated file

Move all the qdisc related data from the spectrum.h to spectrum_qdisc.c.
Create an init and fini functions for the qdiscs.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum: Fix typo in firmware upgrade message
Ido Schimmel [Wed, 10 Jan 2018 13:56:54 +0000 (14:56 +0100)]
mlxsw: spectrum: Fix typo in firmware upgrade message

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>
6 years agoipv6: sr: fix TLVs not being copied using setsockopt
Mathieu Xhonneux [Wed, 10 Jan 2018 13:35:49 +0000 (13:35 +0000)]
ipv6: sr: fix TLVs not being copied using setsockopt

Function ipv6_push_rthdr4 allows to add an IPv6 Segment Routing Header
to a socket through setsockopt, but the current implementation doesn't
copy possible TLVs at the end of the SRH received from userspace.

Therefore, the execution of the following branch if (sr_has_hmac(sr_phdr))
{ ... } will never complete since the len and type fields of a possible
HMAC TLV are not copied, hence seg6_get_tlv_hmac will return an error,
and the HMAC will not be computed.

This commit adds a memcpy in case TLVs have been appended to the SRH.

Fixes: a149e7c7ce81 ("ipv6: sr: add support for SRH injection through setsockopt")
Acked-by: David Lebrun <dlebrun@google.com>
Signed-off-by: Mathieu Xhonneux <m.xhonneux@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoipv6: fix possible mem leaks in ipv6_make_skb()
Eric Dumazet [Wed, 10 Jan 2018 11:45:49 +0000 (03:45 -0800)]
ipv6: fix possible mem leaks in ipv6_make_skb()

ip6_setup_cork() might return an error, while memory allocations have
been done and must be rolled back.

Fixes: 6422398c2ab0 ("ipv6: introduce ipv6_make_skb")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Reported-by: Mike Maloney <maloney@google.com>
Acked-by: Mike Maloney <maloney@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoMerge branch 'mlxsw-couple-of-fixes'
David S. Miller [Wed, 10 Jan 2018 20:58:23 +0000 (15:58 -0500)]
Merge branch 'mlxsw-couple-of-fixes'

Jiri Pirko says:

====================
mlxsw: couple of fixes

Couple of small fixes for mlxsw driver.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: spectrum_qdisc: Don't use variable array in mlxsw_sp_tclass_congestion_enable
Jiri Pirko [Wed, 10 Jan 2018 10:42:44 +0000 (11:42 +0100)]
mlxsw: spectrum_qdisc: Don't use variable array in mlxsw_sp_tclass_congestion_enable

Resolve the sparse warning:
"sparse: Variable length array is used."
Use 2 arrays for 2 PRM register accesses.

Fixes: 96f17e0776c2 ("mlxsw: spectrum: Support RED qdisc offload")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agomlxsw: pci: Wait after reset before accessing HW
Yuval Mintz [Wed, 10 Jan 2018 10:42:43 +0000 (11:42 +0100)]
mlxsw: pci: Wait after reset before accessing HW

After performing reset driver polls on HW indication until learning
that the reset is done, but immediately after reset the device becomes
unresponsive which might lead to completion timeout on the first read.

Wait for 100ms before starting the polling.

Fixes: 233fa44bd67a ("mlxsw: pci: Implement reset done check")
Signed-off-by: Yuval Mintz <yuvalm@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>
6 years agotcp: make local function tcp_recv_timestamp static
Wei Yongjun [Wed, 10 Jan 2018 07:43:15 +0000 (07:43 +0000)]
tcp: make local function tcp_recv_timestamp static

Fixes the following sparse warning:

net/ipv4/tcp.c:1736:6: warning:
 symbol 'tcp_recv_timestamp' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonet/mlx5e: fix error return code in mlx5e_alloc_rq()
Wei Yongjun [Wed, 10 Jan 2018 07:30:53 +0000 (07:30 +0000)]
net/mlx5e: fix error return code in mlx5e_alloc_rq()

Fix to return a negative error code from the xdp_rxq_info_reg() error
handling case instead of 0, as done elsewhere in this function.

Fixes: 0ddf543226ac ("xdp/mlx5: setup xdp_rxq_info")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agocxgb4vf: Fix SGE FL buffer initialization logic for 64K pages
Arjun Vynipadath [Wed, 10 Jan 2018 06:32:13 +0000 (12:02 +0530)]
cxgb4vf: Fix SGE FL buffer initialization logic for 64K pages

We'd come in with SGE_FL_BUFFER_SIZE[0] and [1] both equal to 64KB and
the extant logic would flag that as an error. This was already fixed in
cxgb4 driver with "92ddcc7 cxgb4: Fix some small bugs in
t4_sge_init_soft() when our Page Size is 64KB".

Original Work by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agotuntap: fix for "tuntap: XDP transmission"
Stephen Rothwell [Wed, 10 Jan 2018 04:06:14 +0000 (15:06 +1100)]
tuntap: fix for "tuntap: XDP transmission"

Fixes: fc72d1d54dd9 ("tuntap: XDP transmission")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agonfp: always unmask aux interrupts at init
Jakub Kicinski [Wed, 10 Jan 2018 02:14:28 +0000 (18:14 -0800)]
nfp: always unmask aux interrupts at init

The link state and exception interrupts may be masked when we probe.
The firmware should in theory prevent sending (and automasking) those
interrupts if the device is disabled, but if my reading of the FW code
is correct there are firmwares out there with race conditions in this
area.  The interrupt may also be masked if previous driver which used
the device was malfunctioning and we didn't load the FW (there is no
other good way to comprehensively reset the PF).

Note that FW unmasks the data interrupts by itself when vNIC is
enabled, such helpful operation is not performed for LSC/EXN interrupts.

Always unmask the auxiliary interrupts after request_irq().  On the
remove path add missing PCI write flush before free_irq().

Fixes: 4c3523623dc0 ("net: add driver for Netronome NFP4000/NFP6000 NIC VFs")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
6 years agoi40e: track id can be 0
Jingjing Wu [Tue, 14 Nov 2017 12:00:48 +0000 (07:00 -0500)]
i40e: track id can be 0

track_id == 0 is valid for “read only” profiles when
profile does not have any “write” commands.

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40e: change ppp name to ddp
Jingjing Wu [Tue, 14 Nov 2017 12:00:47 +0000 (07:00 -0500)]
i40e: change ppp name to ddp

PPP name was going to be confusing since PPP already means point
to point protocol. It is decided to change pipeline personalization
profile(ppp) to dynamic device personalization(ddp).

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40evf: Drop i40evf_fire_sw_int as it is prone to races
Alexander Duyck [Tue, 14 Nov 2017 12:00:46 +0000 (07:00 -0500)]
i40evf: Drop i40evf_fire_sw_int as it is prone to races

Having the interrupts firing while we are polling causes extra overhead and
isn't needed for most systems out there. If an interrupt is lost us
experiencing a 2s latency spike before recovering is still not acceptable
and masks the issue. We are better off just identifying systems that lose
interrupts and instead enable workarounds for those systems.

To that end I am dropping the code that was strobing the interrupts as
there is a narrow window where having them enabled can actually cause
race issues anyway where a few stray packets might get misses if the
interrupt is re-enabled and fires before we call napi_complete.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40evf: Clean-up flags for promisc mode to avoid high polling rate
Alexander Duyck [Tue, 14 Nov 2017 12:00:45 +0000 (07:00 -0500)]
i40evf: Clean-up flags for promisc mode to avoid high polling rate

If you enabled and disabled promiscuous mode on a VF you could easily put
it into a state where it would start firing interrupts on all queues at a
rate of 50+ interrupts per second even though there was no traffic present.
The issue seems to have been a stray admin queue feature flag set that was
leaving us in a high polling rate for the adminq task.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40evf: Do not clear MSI-X PBA manually
Alexander Duyck [Tue, 14 Nov 2017 12:00:44 +0000 (07:00 -0500)]
i40evf: Do not clear MSI-X PBA manually

We should not be clearing the pending bit array for each vector manually.
The documentation for the hardware states that when in MSI-X mode the
pending bit array will be cleared automatically. Us clearing it ourselves
just results in multiple opportunities for us to drop an interrupt.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40e: remove redundant initialization of read_size
Colin Ian King [Sun, 5 Nov 2017 13:04:29 +0000 (13:04 +0000)]
i40e: remove redundant initialization of read_size

Variable read_size is initialized and this value is never read, it is
instead set inside the do-loop, hence the initialization is redundant
and can be removed. Cleans up clang warning:

drivers/net/ethernet/intel/i40e/i40e_nvm.c:390:6: warning: Value stored
to 'read_size' during its initialization is never read

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40e/i40evf: Bump driver versions
Alice Michael [Fri, 27 Oct 2017 15:06:56 +0000 (11:06 -0400)]
i40e/i40evf: Bump driver versions

Bump the i40e driver from 2.1.14 to 2.3.2.

Bump the i40evf driver from 3.0.1 to 3.2.2

Signed-off-by: Alice Michael <alice.michael@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40e: add helper conversion function for link_speed
Jacob Keller [Fri, 27 Oct 2017 15:06:54 +0000 (11:06 -0400)]
i40e: add helper conversion function for link_speed

We introduced the virtchnl interface in order to have an interface for
talking to a virtual device driver which was host-driver agnostic. This
interface has its own definitions, including one for link speed.

The host driver has to talk to the virtchnl interface using these new
definitions in order to remain compatible. Today, the i40e link_speed
enumerations are value-exact matches for the virtchnl interface, so it
was originally decided to simply use a typecast.

However, this is unsafe, and makes it easier for future drivers to
continue this unsafe practice. There is nothing guaranteeing these
values are exact, and the type-cast would hide any compiler warning
which indicates the problem.

Rather than rely on this type cast, introduce a helper function which
can convert the AdminQ link speed definition into a virtchnl
definition. This can then be used by host driver implementations in
order to safely convert to the interface recognized by the virtual
functions.

If the link speed is not able to be represented by the virtchnl
definitions we'll report UNKNOWN which is the safest result.

This will ensure that should the driver specific link_speeds actual bit
definitions change, we do not report them incorrectly according to the
VF.

Additionally, this provides a better pattern for future drivers to copy,
as it is more likely a future device may not use the exact same bit-wise
definition as the current virtchnl interface.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40e: update VFs of link state after GET_VF_RESOURCES
Jacob Keller [Fri, 27 Oct 2017 15:06:53 +0000 (11:06 -0400)]
i40e: update VFs of link state after GET_VF_RESOURCES

We currently notify a VF of the link state after ENABLE_QUEUES, which is
the last thing a VF does after being configured. Guests may not actually
ENABLE_QUEUES until they get configured, and thus between driver load
and device configuration the VF may show inaccurate link status.

Fix this by also sending the link state after GET_VF_RESOURCES. Although
we could remove the message following ENABLE_QUEUES, it's not that
significant of a loss, so this patch just keeps both to ensure maximum
compatibility with guests on various OSes.

Specifically, without this patch guests running FreeBSD will display
inaccurate link state until the device is brought up. This is mostly
a cosmetic issue but can be confusing to system administrators.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40evf: hold the critical task bit lock while opening
Jacob Keller [Fri, 27 Oct 2017 15:06:52 +0000 (11:06 -0400)]
i40evf: hold the critical task bit lock while opening

If i40evf_open() is called quickly at the same time as a reset occurs
(such as via ethtool) it is possible for the device to attempt to open
while a reset is in progress. This occurs because the driver was not
holding the critical task bit lock during i40evf_open, nor was it
holding it around the call to i40evf_up_complete() in
i40evf_reset_task().

We didn't hold the lock previously because calls to i40evf_down() would
take the bit lock directly, and this would have caused a deadlock.

To avoid this, we'll move the bit lock handling out of i40evf_down() and
into the callers of this function. Additionally, we'll now hold the bit
lock over the entire set of steps when going up or down, to ensure that
we remain consistent.

Ultimately this causes us to serialize the transitions between down and
up properly, and avoid changing status while we're resetting.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40evf: release bit locks in reverse order
Jacob Keller [Fri, 27 Oct 2017 15:06:51 +0000 (11:06 -0400)]
i40evf: release bit locks in reverse order

Although not strictly necessary, it is customary to reverse the order in
which we release locks that we acquire. This helps preserve lock
ordering during future refactors, which can help avoid potential
deadlock situations.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40evf: use spinlock to protect (mac|vlan)_filter_list
Jacob Keller [Fri, 27 Oct 2017 15:06:50 +0000 (11:06 -0400)]
i40evf: use spinlock to protect (mac|vlan)_filter_list

Stop overloading the __I40EVF_IN_CRITICAL_TASK bit lock to protect the
mac_filter_list and vlan_filter_list. Instead, implement a spinlock to
protect these two lists, similar to how we protect the hash in the i40e
PF code.

Ensure that every place where we access the list uses the spinlock to
ensure consistency, and stop holding the critical section around blocks
of code which only need access to the macvlan filter lists.

This refactor helps simplify the locking behavior, and is necessary as
a future refactor to the __I40EVF_IN_CRITICAL_TASK would cause
a deadlock otherwise.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
6 years agoi40evf: don't rely on netif_running() outside rtnl_lock()
Jacob Keller [Fri, 27 Oct 2017 15:06:49 +0000 (11:06 -0400)]
i40evf: don't rely on netif_running() outside rtnl_lock()

In i40evf_reset_task we use netif_running() to determine whether or not
the device is currently up. This allows us to properly free queue memory
and shut down things before we request the hardware reset.

It turns out that we cannot be guaranteed of netif_running() returning
false until the device is fully up, as the kernel core code sets
__LINK_STATE_START prior to calling .ndo_open. Since we're not holding
the rtnl_lock(), it's possible that the driver's i40evf_open handler
function is currently being called while we're resetting.

We can't simply hold the rtnl_lock() while checking netif_running() as
this could cause a deadlock with the i40evf_open() function.
Additionally, we can't avoid the deadlock by holding the rtnl_lock()
over the whole reset path, as this essentially serializes all resets,
and can cause massive delays if we have multiple VFs on a system.

Instead, lets just check our own internal state __I40EVF_RUNNING state
field. This allows us to ensure that the state is correct and is only
set after we've finished bringing the device up.

Without this change we might free data structures about device queues
and other memory before they've been fully allocated.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>