platform/kernel/linux-starfive.git
4 years agobpf: Use dedicated bpf_trace_printk event instead of trace_printk()
Alan Maguire [Mon, 13 Jul 2020 11:52:33 +0000 (12:52 +0100)]
bpf: Use dedicated bpf_trace_printk event instead of trace_printk()

The bpf helper bpf_trace_printk() uses trace_printk() under the hood.
This leads to an alarming warning message originating from trace
buffer allocation which occurs the first time a program using
bpf_trace_printk() is loaded.

We can instead create a trace event for bpf_trace_printk() and enable
it in-kernel when/if we encounter a program using the
bpf_trace_printk() helper.  With this approach, trace_printk()
is not used directly and no warning message appears.

This work was started by Steven (see Link) and finished by Alan; added
Steven's Signed-off-by with his permission.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/r/20200628194334.6238b933@oasis.local.home
Link: https://lore.kernel.org/bpf/1594641154-18897-2-git-send-email-alan.maguire@oracle.com
4 years agotools/bpftool: Remove warning about PID iterator support
Andrii Nakryiko [Fri, 10 Jul 2020 23:26:04 +0000 (16:26 -0700)]
tools/bpftool: Remove warning about PID iterator support

Don't emit warning that bpftool was built without PID iterator support. This
error garbles JSON output of otherwise perfectly valid show commands.

Reported-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200710232605.20918-1-andriin@fb.com
4 years agoMerge branch 'af_xdp-stats'
Alexei Starovoitov [Mon, 13 Jul 2020 22:32:56 +0000 (15:32 -0700)]
Merge branch 'af_xdp-stats'

Ciara Loftus says:

====================
This series introduces new statistics for af_xdp:
1. drops due to rx ring being full
2. drops due to fill ring being empty
3. failures pulling an item from the tx ring

These statistics should assist users debugging and troubleshooting
peformance issues and packet drops.

The statistics are made available though the getsockopt and xsk_diag
interfaces, and the ability to dump these extended statistics is made
available in the xdpsock application via the --extra-stats or -x flag.

A separate patch which will add ss/iproute2 support will follow.
====================

Acked-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
4 years agoxsk: Add xdp statistics to xsk_diag
Ciara Loftus [Wed, 8 Jul 2020 07:28:35 +0000 (07:28 +0000)]
xsk: Add xdp statistics to xsk_diag

Add xdp statistics to the information dumped through the xsk_diag interface

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200708072835.4427-4-ciara.loftus@intel.com
4 years agosamples: bpf: Add an option for printing extra statistics in xdpsock
Ciara Loftus [Wed, 8 Jul 2020 07:28:34 +0000 (07:28 +0000)]
samples: bpf: Add an option for printing extra statistics in xdpsock

Introduce the --extra-stats (or simply -x) flag to the xdpsock application
which prints additional statistics alongside the regular rx and tx
counters. The new statistics printed report error conditions eg. rx ring
full, invalid descriptors, etc.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200708072835.4427-3-ciara.loftus@intel.com
4 years agoxsk: Add new statistics
Ciara Loftus [Wed, 8 Jul 2020 07:28:33 +0000 (07:28 +0000)]
xsk: Add new statistics

It can be useful for the user to know the reason behind a dropped packet.
Introduce new counters which track drops on the receive path caused by:
1. rx ring being full
2. fill ring being empty

Also, on the tx path introduce a counter which tracks the number of times
we attempt pull from the tx ring when it is empty.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200708072835.4427-2-ciara.loftus@intel.com
4 years agoMerge branch 'resolve_btfids'
Alexei Starovoitov [Mon, 13 Jul 2020 17:42:03 +0000 (10:42 -0700)]
Merge branch 'resolve_btfids'

Jiri Olsa says:

====================
This patchset adds:
  - support to generate BTF ID lists that are resolved during
    kernel linking and usable within kernel code with following
    macros:

      BTF_ID_LIST(bpf_skb_output_btf_ids)
      BTF_ID(struct, sk_buff)

    and access it in kernel code via:
      extern u32 bpf_skb_output_btf_ids[];

  - resolve_btfids tool that scans elf object for .BTF_ids
    section and resolves its symbols with BTF ID values
  - resolving of bpf_ctx_convert struct and several other
    objects with BTF_ID_LIST

v7 changes:
  - added more acks [Andrii]
  - added some name-conflicting entries and fixed resolve_btfids
    to process them properly [Andrii]
  - changed bpf_get_task_stack_proto to use BTF_IDS_LIST/BTF_ID
    macros [Andrii]
  - fixed selftest build for resolve_btfids test
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
4 years agoselftests/bpf: Add test for resolve_btfids
Jiri Olsa [Sat, 11 Jul 2020 21:53:29 +0000 (23:53 +0200)]
selftests/bpf: Add test for resolve_btfids

Adding resolve_btfids test under test_progs suite.

It's possible to use btf_ids.h header and its logic in
user space application, so we can add easy test for it.

The test defines BTF_ID_LIST and checks it gets properly
resolved.

For this reason the test_progs binary (and other binaries
that use TRUNNER* macros) is processed with resolve_btfids
tool, which resolves BTF IDs in .BTF_ids section. The BTF
data are taken from btf_data.o object rceated from
progs/btf_data.c.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200711215329.41165-10-jolsa@kernel.org
4 years agotools headers: Adopt verbatim copy of btf_ids.h from kernel sources
Jiri Olsa [Sat, 11 Jul 2020 21:53:28 +0000 (23:53 +0200)]
tools headers: Adopt verbatim copy of btf_ids.h from kernel sources

It will be needed by bpf selftest for resolve_btfids tool.

Also adding __PASTE macro as btf_ids.h dependency, which is
defined in:

  include/linux/compiler_types.h

but because tools/include do not have this header, I'm putting
the macro into linux/compiler.h header.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200711215329.41165-9-jolsa@kernel.org
4 years agobpf: Add info about .BTF_ids section to btf.rst
Jiri Olsa [Sat, 11 Jul 2020 21:53:27 +0000 (23:53 +0200)]
bpf: Add info about .BTF_ids section to btf.rst

Updating btf.rst doc with info about .BTF_ids section

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200711215329.41165-8-jolsa@kernel.org
4 years agobpf: Use BTF_ID to resolve bpf_ctx_convert struct
Jiri Olsa [Sat, 11 Jul 2020 21:53:26 +0000 (23:53 +0200)]
bpf: Use BTF_ID to resolve bpf_ctx_convert struct

This way the ID is resolved during compile time,
and we can remove the runtime name search.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200711215329.41165-7-jolsa@kernel.org
4 years agobpf: Remove btf_id helpers resolving
Jiri Olsa [Sat, 11 Jul 2020 21:53:25 +0000 (23:53 +0200)]
bpf: Remove btf_id helpers resolving

Now when we moved the helpers btf_id arrays into .BTF_ids section,
we can remove the code that resolve those IDs in runtime.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200711215329.41165-6-jolsa@kernel.org
4 years agobpf: Resolve BTF IDs in vmlinux image
Jiri Olsa [Sat, 11 Jul 2020 21:53:24 +0000 (23:53 +0200)]
bpf: Resolve BTF IDs in vmlinux image

Using BTF_ID_LIST macro to define lists for several helpers
using BTF arguments.

And running resolve_btfids on vmlinux elf object during linking,
so the .BTF_ids section gets the IDs resolved.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200711215329.41165-5-jolsa@kernel.org
4 years agobpf: Add BTF_ID_LIST/BTF_ID/BTF_ID_UNUSED macros
Jiri Olsa [Sat, 11 Jul 2020 21:53:23 +0000 (23:53 +0200)]
bpf: Add BTF_ID_LIST/BTF_ID/BTF_ID_UNUSED macros

Adding support to generate .BTF_ids section that will hold BTF
ID lists for verifier.

Adding macros that will help to define lists of BTF ID values
placed in .BTF_ids section. They are initially filled with zeros
(during compilation) and resolved later during the linking phase
by resolve_btfids tool.

Following defines list of one BTF ID value:

  BTF_ID_LIST(bpf_skb_output_btf_ids)
  BTF_ID(struct, sk_buff)

It also defines following variable to access the list:

  extern u32 bpf_skb_output_btf_ids[];

The BTF_ID_UNUSED macro defines 4 zero bytes. It's used when we
want to define 'unused' entry in BTF_ID_LIST, like:

  BTF_ID_LIST(bpf_skb_output_btf_ids)
  BTF_ID(struct, sk_buff)
  BTF_ID_UNUSED
  BTF_ID(struct, task_struct)

Suggested-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200711215329.41165-4-jolsa@kernel.org
4 years agobpf: Compile resolve_btfids tool at kernel compilation start
Jiri Olsa [Sat, 11 Jul 2020 21:53:22 +0000 (23:53 +0200)]
bpf: Compile resolve_btfids tool at kernel compilation start

The resolve_btfids tool will be used during the vmlinux linking,
so it's necessary it's ready for it.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200711215329.41165-3-jolsa@kernel.org
4 years agobpf: Add resolve_btfids tool to resolve BTF IDs in ELF object
Jiri Olsa [Sat, 11 Jul 2020 21:53:21 +0000 (23:53 +0200)]
bpf: Add resolve_btfids tool to resolve BTF IDs in ELF object

The resolve_btfids tool scans elf object for .BTF_ids section
and resolves its symbols with BTF ID values.

It will be used to during linking time to resolve arrays of BTF
ID values used in verifier, so these IDs do not need to be
resolved in runtime.

The expected layout of .BTF_ids section is described in main.c
header. Related kernel changes are coming in following changes.

Build issue reported by 0-DAY CI Kernel Test Service.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200711215329.41165-2-jolsa@kernel.org
4 years agobpf: Fix fds_example SIGSEGV error
Wenbo Zhang [Fri, 10 Jul 2020 09:20:35 +0000 (05:20 -0400)]
bpf: Fix fds_example SIGSEGV error

The `BPF_LOG_BUF_SIZE`'s value is `UINT32_MAX >> 8`, so define an array
with it on stack caused an overflow.

Signed-off-by: Wenbo Zhang <ethercflow@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200710092035.28919-1-ethercflow@gmail.com
4 years agolibbpf: Fix memory leak and optimize BTF sanitization
Andrii Nakryiko [Fri, 10 Jul 2020 01:10:23 +0000 (18:10 -0700)]
libbpf: Fix memory leak and optimize BTF sanitization

Coverity's static analysis helpfully reported a memory leak introduced by
0f0e55d8247c ("libbpf: Improve BTF sanitization handling"). While fixing it,
I realized that btf__new() already creates a memory copy, so there is no need
to do this. So this patch also fixes misleading btf__new() signature to make
data into a `const void *` input parameter. And it avoids unnecessary memory
allocation and copy in BTF sanitization code altogether.

Fixes: 0f0e55d8247c ("libbpf: Improve BTF sanitization handling")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200710011023.1655008-1-andriin@fb.com
4 years agoMerge branch 'bpf-libbpf-old-kernel'
Daniel Borkmann [Wed, 8 Jul 2020 22:44:46 +0000 (00:44 +0200)]
Merge branch 'bpf-libbpf-old-kernel'

Andrii Nakryiko says:

====================
This patch set improves libbpf's support of old kernels, missing features like
BTF support, global variables support, etc.

Most critical one is a silent drop of CO-RE relocations if libbpf fails to
load BTF (despite sanitization efforts). This is frequently the case for
kernels that have no BTF support whatsoever. There are still useful BPF
applications that could work on such kernels and do rely on CO-RE. To that
end, this series revamps the way BTF is handled in libbpf. Failure to load BTF
into kernel doesn't prevent libbpf from using BTF in its full capability
(e.g., for CO-RE relocations) internally.

Another issue that was identified was reliance of perf_buffer__new() on
BPF_OBJ_GET_INFO_BY_FD command, which is more recent that perf_buffer support
itself. Furthermore, BPF_OBJ_GET_INFO_BY_FD is needed just for some sanity
checks to provide better user errors, so could be safely omitted if kernel
doesn't provide it.

Perf_buffer selftest was adjusted to use skeleton, instead of bpf_prog_load().
The latter uses BPF_F_TEST_RND_HI32 flag, which is a relatively recent
addition and unnecessary fails selftest in libbpf's Travis CI tests. By using
skeleton we both get a shorter selftest and it work on pretty ancient kernels,
giving better libbpf test coverage.

One new selftest was added that relies on basic CO-RE features, but otherwise
doesn't expect any recent features (like global variables) from kernel. Again,
it's good to have better coverage of old kernels in libbpf testing.
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
4 years agoselftests/bpf: Switch perf_buffer test to tracepoint and skeleton
Andrii Nakryiko [Wed, 8 Jul 2020 01:53:18 +0000 (18:53 -0700)]
selftests/bpf: Switch perf_buffer test to tracepoint and skeleton

Switch perf_buffer test to use skeleton to avoid use of bpf_prog_load() and
make test a bit more succinct. Also switch BPF program to use tracepoint
instead of kprobe, as that allows to support older kernels, which had
tracepoint support before kprobe support in the form that libbpf expects
(i.e., libbpf expects /sys/bus/event_source/devices/kprobe/type, which doesn't
always exist on old kernels).

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200708015318.3827358-7-andriin@fb.com
4 years agolibbpf: Handle missing BPF_OBJ_GET_INFO_BY_FD gracefully in perf_buffer
Andrii Nakryiko [Wed, 8 Jul 2020 01:53:17 +0000 (18:53 -0700)]
libbpf: Handle missing BPF_OBJ_GET_INFO_BY_FD gracefully in perf_buffer

perf_buffer__new() is relying on BPF_OBJ_GET_INFO_BY_FD availability for few
sanity checks. OBJ_GET_INFO for maps is actually much more recent feature than
perf_buffer support itself, so this causes unnecessary problems on old kernels
before BPF_OBJ_GET_INFO_BY_FD was added.

This patch makes those sanity checks optional and just assumes best if command
is not supported. If user specified something incorrectly (e.g., wrong map
type), kernel will reject it later anyway, except user won't get a nice
explanation as to why it failed. This seems like a good trade off for
supporting perf_buffer on old kernels.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200708015318.3827358-6-andriin@fb.com
4 years agoselftests/bpf: Add test relying only on CO-RE and no recent kernel features
Andrii Nakryiko [Wed, 8 Jul 2020 01:53:16 +0000 (18:53 -0700)]
selftests/bpf: Add test relying only on CO-RE and no recent kernel features

Add a test that relies on CO-RE, but doesn't expect any of the recent
features, not available on old kernels. This is useful for Travis CI tests
running against very old kernels (e.g., libbpf has 4.9 kernel testing now), to
verify that CO-RE still works, even if kernel itself doesn't support BTF yet,
as long as there is .BTF embedded into vmlinux image by pahole. Given most of
CO-RE doesn't require any kernel awareness of BTF, it is a useful test to
validate that libbpf's BTF sanitization is working well even with ancient
kernels.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200708015318.3827358-5-andriin@fb.com
4 years agolibbpf: Improve BTF sanitization handling
Andrii Nakryiko [Wed, 8 Jul 2020 01:53:15 +0000 (18:53 -0700)]
libbpf: Improve BTF sanitization handling

Change sanitization process to preserve original BTF, which might be used by
libbpf itself for Kconfig externs, CO-RE relocs, etc, even if kernel is old
and doesn't support BTF. To achieve that, if libbpf detects the need for BTF
sanitization, it would clone original BTF, sanitize it in-place, attempt to
load it into kernel, and if successful, will preserve loaded BTF FD in
original `struct btf`, while freeing sanitized local copy.

If kernel doesn't support any BTF, original btf and btf_ext will still be
preserved to be used later for CO-RE relocation and other BTF-dependent libbpf
features, which don't dependon kernel BTF support.

Patch takes care to not specify BTF and BTF.ext features when loading BPF
programs and/or maps, if it was detected that kernel doesn't support BTF
features.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200708015318.3827358-4-andriin@fb.com
4 years agolibbpf: Add btf__set_fd() for more control over loaded BTF FD
Andrii Nakryiko [Wed, 8 Jul 2020 01:53:14 +0000 (18:53 -0700)]
libbpf: Add btf__set_fd() for more control over loaded BTF FD

Add setter for BTF FD to allow application more fine-grained control in more
advanced scenarios. Storing BTF FD inside `struct btf` provides little benefit
and probably would be better done differently (e.g., btf__load() could just
return FD on success), but we are stuck with this due to backwards
compatibility. The main problem is that it's impossible to load BTF and than
free user-space memory, but keep FD intact, because `struct btf` assumes
ownership of that FD upon successful load and will attempt to close it during
btf__free(). To allow callers (e.g., libbpf itself for BTF sanitization) to
have more control over this, add btf__set_fd() to allow to reset FD
arbitrarily, if necessary.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200708015318.3827358-3-andriin@fb.com
4 years agolibbpf: Make BTF finalization strict
Andrii Nakryiko [Wed, 8 Jul 2020 01:53:13 +0000 (18:53 -0700)]
libbpf: Make BTF finalization strict

With valid ELF and valid BTF, there is no reason (apart from bugs) why BTF
finalization should fail. So make it strict and return error if it fails. This
makes CO-RE relocation more reliable, as they are not going to be just
silently skipped, if BTF finalization failed.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200708015318.3827358-2-andriin@fb.com
4 years agoselftests/bpf: test_progs avoid minus shell exit codes
Jesper Dangaard Brouer [Tue, 7 Jul 2020 07:12:25 +0000 (09:12 +0200)]
selftests/bpf: test_progs avoid minus shell exit codes

There are a number of places in test_progs that use minus-1 as the argument
to exit(). This is confusing as a process exit status is masked to be a
number between 0 and 255 as defined in man exit(3). Thus, users will see
status 255 instead of minus-1.

This patch use positive exit code 3 instead of minus-1. These cases are put
in the same group of infrastructure setup errors.

Fixes: fd27b1835e70 ("selftests/bpf: Reset process and thread affinity after each test/sub-test")
Fixes: 811d7e375d08 ("bpf: selftests: Restore netns after each test")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/159410594499.1093222.11080787853132708654.stgit@firesoul
4 years agoselftests/bpf: test_progs use another shell exit on non-actions
Jesper Dangaard Brouer [Tue, 7 Jul 2020 07:12:19 +0000 (09:12 +0200)]
selftests/bpf: test_progs use another shell exit on non-actions

This is a follow up adjustment to commit 6c92bd5cd465 ("selftests/bpf:
Test_progs indicate to shell on non-actions"), that returns shell exit
indication EXIT_FAILURE (value 1) when user selects a non-existing test.

The problem with using EXIT_FAILURE is that a shell script cannot tell
the difference between a non-existing test and the test failing.

This patch uses value 2 as shell exit indication.
(Aside note unrecognized option parameters use value 64).

Fixes: 6c92bd5cd465 ("selftests/bpf: Test_progs indicate to shell on non-actions")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/159410593992.1093222.90072558386094370.stgit@firesoul
4 years agobpf: Fix another bpftool segfault without skeleton code enabled
Louis Peens [Wed, 8 Jul 2020 11:08:27 +0000 (13:08 +0200)]
bpf: Fix another bpftool segfault without skeleton code enabled

emit_obj_refs_json needs to added the same as with emit_obj_refs_plain
to prevent segfaults, similar to Commit "8ae4121bd89e bpf: Fix bpftool
without skeleton code enabled"). See the error below:

    # ./bpftool -p prog
    {
        "error": "bpftool built without PID iterator support"
    },[{
            "id": 2,
            "type": "cgroup_skb",
            "tag": "7be49e3934a125ba",
            "gpl_compatible": true,
            "loaded_at": 1594052789,
            "uid": 0,
            "bytes_xlated": 296,
            "jited": true,
            "bytes_jited": 203,
            "bytes_memlock": 4096,
            "map_ids": [2,3
    Segmentation fault (core dumped)

The same happens for ./bpftool -p map, as well as ./bpftool -j prog/map.

Fixes: d53dee3fe013 ("tools/bpftool: Show info for processes holding BPF map/prog/link/btf FDs")
Signed-off-by: Louis Peens <louis.peens@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20200708110827.7673-1-louis.peens@netronome.com
4 years agoselftests: bpf: Remove unused bpf_map_def_legacy struct
Daniel T. Lee [Tue, 7 Jul 2020 18:48:55 +0000 (03:48 +0900)]
selftests: bpf: Remove unused bpf_map_def_legacy struct

samples/bpf no longer use bpf_map_def_legacy and instead use the
libbpf's bpf_map_def or new BTF-defined MAP format. This commit removes
unused bpf_map_def_legacy struct from selftests/bpf/bpf_legacy.h.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200707184855.30968-5-danieltimlee@gmail.com
4 years agosamples: bpf: Refactor BPF map performance test with libbpf
Daniel T. Lee [Tue, 7 Jul 2020 18:48:54 +0000 (03:48 +0900)]
samples: bpf: Refactor BPF map performance test with libbpf

Previously, in order to set the numa_node attribute at the time of map
creation using "libbpf", it was necessary to call bpf_create_map_node()
directly (bpf_load approach), instead of calling bpf_object_load()
that handles everything on its own, including map creation. And because
of this problem, this sample had problems with refactoring from bpf_load
to libbbpf.

However, by commit 1bdb6c9a1c43 ("libbpf: Add a bunch of attribute
getters/setters for map definitions") added the numa_node attribute and
allowed it to be set in the map.

By using libbpf instead of bpf_load, the inner map definition has
been explicitly declared with BTF-defined format. Also, the element of
ARRAY_OF_MAPS was also statically specified using the BTF format. And
for this reason some logic in fixup_map() was not needed and changed
or removed.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200707184855.30968-4-danieltimlee@gmail.com
4 years agosamples: bpf: Refactor BPF map in map test with libbpf
Daniel T. Lee [Tue, 7 Jul 2020 18:48:53 +0000 (03:48 +0900)]
samples: bpf: Refactor BPF map in map test with libbpf

From commit 646f02ffdd49 ("libbpf: Add BTF-defined map-in-map
support"), a way to define internal map in BTF-defined map has been
added.

Instead of using previous 'inner_map_idx' definition, the structure to
be used for the inner map can be directly defined using array directive.

    __array(values, struct inner_map)

This commit refactors map in map test program with libbpf by explicitly
defining inner map with BTF-defined format.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200707184855.30968-3-danieltimlee@gmail.com
4 years agosamples: bpf: Fix bpf programs with kprobe/sys_connect event
Daniel T. Lee [Tue, 7 Jul 2020 18:48:52 +0000 (03:48 +0900)]
samples: bpf: Fix bpf programs with kprobe/sys_connect event

Currently, BPF programs with kprobe/sys_connect does not work properly.

Commit 34745aed515c ("samples/bpf: fix kprobe attachment issue on x64")
This commit modifies the bpf_load behavior of kprobe events in the x64
architecture. If the current kprobe event target starts with "sys_*",
add the prefix "__x64_" to the front of the event.

Appending "__x64_" prefix with kprobe/sys_* event was appropriate as a
solution to most of the problems caused by the commit below.

    commit d5a00528b58c ("syscalls/core, syscalls/x86: Rename struct
    pt_regs-based sys_*() to __x64_sys_*()")

However, there is a problem with the sys_connect kprobe event that does
not work properly. For __sys_connect event, parameters can be fetched
normally, but for __x64_sys_connect, parameters cannot be fetched.

    ffffffff818d3520 <__x64_sys_connect>:
    ffffffff818d3520: e8 fb df 32 00        callq   0xffffffff81c01520
    <__fentry__>
    ffffffff818d3525: 48 8b 57 60           movq    96(%rdi), %rdx
    ffffffff818d3529: 48 8b 77 68           movq    104(%rdi), %rsi
    ffffffff818d352d: 48 8b 7f 70           movq    112(%rdi), %rdi
    ffffffff818d3531: e8 1a ff ff ff        callq   0xffffffff818d3450
    <__sys_connect>
    ffffffff818d3536: 48 98                 cltq
    ffffffff818d3538: c3                    retq
    ffffffff818d3539: 0f 1f 80 00 00 00 00  nopl    (%rax)

As the assembly code for __x64_sys_connect shows, parameters should be
fetched and set into rdi, rsi, rdx registers prior to calling
__sys_connect.

Because of this problem, this commit fixes the sys_connect event by
first getting the value of the rdi register and then the value of the
rdi, rsi, and rdx register through an offset based on that value.

Fixes: 34745aed515c ("samples/bpf: fix kprobe attachment issue on x64")
Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200707184855.30968-2-danieltimlee@gmail.com
4 years agoselftests/bpf: Test BPF_CGROUP_INET_SOCK_RELEASE
Stanislav Fomichev [Mon, 6 Jul 2020 23:01:28 +0000 (16:01 -0700)]
selftests/bpf: Test BPF_CGROUP_INET_SOCK_RELEASE

Simple test that enforces a single SOCK_DGRAM socket per cgroup.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200706230128.4073544-5-sdf@google.com
4 years agobpftool: Add support for BPF_CGROUP_INET_SOCK_RELEASE
Stanislav Fomichev [Mon, 6 Jul 2020 23:01:27 +0000 (16:01 -0700)]
bpftool: Add support for BPF_CGROUP_INET_SOCK_RELEASE

Support attaching to BPF_CGROUP_INET_SOCK_RELEASE and properly
display attach type upon prog dump.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200706230128.4073544-4-sdf@google.com
4 years agolibbpf: Add support for BPF_CGROUP_INET_SOCK_RELEASE
Stanislav Fomichev [Mon, 6 Jul 2020 23:01:26 +0000 (16:01 -0700)]
libbpf: Add support for BPF_CGROUP_INET_SOCK_RELEASE

Add auto-detection for the cgroup/sock_release programs.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200706230128.4073544-3-sdf@google.com
4 years agobpf: Add BPF_CGROUP_INET_SOCK_RELEASE hook
Stanislav Fomichev [Mon, 6 Jul 2020 23:01:25 +0000 (16:01 -0700)]
bpf: Add BPF_CGROUP_INET_SOCK_RELEASE hook

Sometimes it's handy to know when the socket gets freed. In
particular, we'd like to try to use a smarter allocation of
ports for bpf_bind and explore the possibility of limiting
the number of SOCK_DGRAM sockets the process can have.

Implement BPF_CGROUP_INET_SOCK_RELEASE hook that triggers on
inet socket release. It triggers only for userspace sockets
(not in-kernel ones) and therefore has the same semantics as
the existing BPF_CGROUP_INET_SOCK_CREATE.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200706230128.4073544-2-sdf@google.com
4 years agomvpp2: fix pointer check
Matteo Croce [Tue, 7 Jul 2020 13:19:13 +0000 (15:19 +0200)]
mvpp2: fix pointer check

priv->page_pool is an array, so comparing against it will always return true.
Do a meaningful check by checking priv->page_pool[0] instead.
While at it, clear the page_pool pointers on deallocation, or when an
allocation error happens during init.

Reported-by: Colin Ian King <colin.king@canonical.com>
Fixes: c2d6fe6163de ("mvpp2: XDP TX support")
Signed-off-by: Matteo Croce <mcroce@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomptcp: use mptcp worker for path management
Florian Westphal [Tue, 7 Jul 2020 12:40:48 +0000 (14:40 +0200)]
mptcp: use mptcp worker for path management

We can re-use the existing work queue to handle path management
instead of a dedicated work queue.  Just move pm_worker to protocol.c,
call it from the mptcp worker and get rid of the msk lock (already held).

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosun/cassini: mark cas_resume() as __maybe_unused
Wei Yongjun [Tue, 7 Jul 2020 10:55:43 +0000 (18:55 +0800)]
sun/cassini: mark cas_resume() as __maybe_unused

In certain configurations without power management support, gcc report
the following warning:

drivers/net/ethernet/sun/cassini.c:5206:12: warning:
 'cas_resume' defined but not used [-Wunused-function]
 5206 | static int cas_resume(struct device *dev_d)
      |            ^~~~~~~~~~

Mark cas_resume() as __maybe_unused to make it clear.

Fixes: f193f4ebde3d ("sun/cassini: use generic power management")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosun/niu: add __maybe_unused attribute to PM functions
Vaibhav Gupta [Tue, 7 Jul 2020 07:41:22 +0000 (13:11 +0530)]
sun/niu: add __maybe_unused attribute to PM functions

The upgraded .suspend() and .resume() throw
"defined but not used [-Wunused-function]" warning for certain
configurations.

Mark them with "__maybe_unused" attribute.

Compile-tested only.

Fixes: b0db0cc2f695 ("sun/niu: use generic power management")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'phy-warn'
David S. Miller [Tue, 7 Jul 2020 19:47:11 +0000 (12:47 -0700)]
Merge branch 'phy-warn'

Andrew Lunn says:

====================
drivers/net/phy C=1 W=1 fixes

This fixes most of the Sparse and W=1 warnings in drivers/net/phy. The
Cavium code is still not fully clean, but it might actually be the
strange code is confusing Sparse.

v2
--
Added RB, TB, AB.
s/case/cause
Reverse Christmas tree
Module soft dependencies
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: mdio-octeon: Cleanup module loading dependencies
Andrew Lunn [Tue, 7 Jul 2020 01:49:39 +0000 (03:49 +0200)]
net: phy: mdio-octeon: Cleanup module loading dependencies

To ensure that the octeon MDIO driver has been loaded, the Cavium
ethernet drivers reference a dummy symbol in the MDIO driver. This
forces it to be loaded first. And this symbol has not been cleanly
implemented, resulting in warnings when build W=1 C=1.

Since device tree is being used, and a phandle points to the PHY on
the MDIO bus, we can make use of deferred probing. If the PHY fails to
connect, it should be because the MDIO bus driver has not loaded
yet. Return -EPROBE_DEFER so it will be tried again later.

Additionally, add a MODULE_SOFTDEP() to give user space a hint as to
what order it should load the modules.

v2:
s/octoen/octeon/
Add MODULE_SOFTDEP()

Cc: Sunil Goutham <sgoutham@marvell.com>
Cc: Robert Richter <rrichter@marvell.com>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: cavium: Improve __iomem mess
Andrew Lunn [Tue, 7 Jul 2020 01:49:38 +0000 (03:49 +0200)]
net: phy: cavium: Improve __iomem mess

The MIPS low level register access functions seem to be missing
__iomem annotation. This causes lots of sparse warnings, when code
casts off the __iomem. Make the Cavium MDIO drivers cleaner by pushing
the casts lower down into the helpers, allow the drivers to work as
normal, with __iomem.

bus->register_base is now an void *, rather than a u64. So forming the
mii_bus->id string cannot use %llx any more. Use %px, so this kernel
address is still exposed to user space, as it was before.

v2: s/cases/causes/g

Cc: Sunil Goutham <sgoutham@marvell.com>
Cc: Robert Richter <rrichter@marvell.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: dp83640: Fixup cast to restricted __be16 warning
Andrew Lunn [Tue, 7 Jul 2020 01:49:37 +0000 (03:49 +0200)]
net: phy: dp83640: Fixup cast to restricted __be16 warning

ntohs() expects to be passed a __be16. Correct the type of the
variable holding the sequence ID.

Cc: Richard Cochran <richardcochran@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: Make phy_10gbit_fec_features_array static
Andrew Lunn [Tue, 7 Jul 2020 01:49:36 +0000 (03:49 +0200)]
net: phy: Make phy_10gbit_fec_features_array static

This array is not used outside of phy_device.c, so make it static.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: Properly define genphy_c45_driver
Andrew Lunn [Tue, 7 Jul 2020 01:49:35 +0000 (03:49 +0200)]
net: phy: Properly define genphy_c45_driver

Avoid the W=1 warning that symbol 'genphy_c45_driver' was not
declared. Should it be static?

Declare it on the phy header file.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: Fixup parameters in kerneldoc
Andrew Lunn [Tue, 7 Jul 2020 01:49:34 +0000 (03:49 +0200)]
net: phy: Fixup parameters in kerneldoc

Correct the kerneldoc for a few structure and function calls,
as reported by C=1 W=1.

Cc: Alexandru Ardelean <alexaundru.ardelean@analog.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: at803x: Avoid comparison is always false warning
Andrew Lunn [Tue, 7 Jul 2020 01:49:33 +0000 (03:49 +0200)]
net: phy: at803x: Avoid comparison is always false warning

By placing the GENMASK value into an unsigned int and then passing it
to PREF_FIELD, the type is reduces down from ULL. Given the reduced
size of the type, the range checks in PREP_FAIL() are always true, and
-Wtype-limits then gives a warning.

By skipping the intermediate variable, the warning can be avoided.

Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: sfp: Unique GPIO interrupt names
Chris Healy [Tue, 7 Jul 2020 01:27:07 +0000 (18:27 -0700)]
net: sfp: Unique GPIO interrupt names

Dynamically generate a unique GPIO interrupt name, based on the
device name and the GPIO name.  For example:

103:          0   sx1503q  12 Edge      sff2-los
104:          0   sx1503q  13 Edge      sff2-tx-fault

The sffX indicates the SFP the los and tx-fault are associated with.

v3:
- reverse Christmas tree new variable
- fix spaces vs tabs
v2:
- added net-next to PATCH part of subject line
- switched to devm_kasprintf()

Signed-off-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoice: add documentation for device-caps region
Jacob Keller [Mon, 6 Jul 2020 21:53:41 +0000 (14:53 -0700)]
ice: add documentation for device-caps region

The recent change by commit 8d7aab3515fa ("ice: implement snapshot for
device capabilities") to implement the device-caps region for the ice
driver forgot to document it.

Add documentation to the ice devlink documentation file describing the
new region and add some sample output to the shell commands provided as
an example.

Fixes: 8d7aab3515fa ("ice: implement snapshot for device capabilities")
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: systemport: Add support for VLAN transmit acceleration
Florian Fainelli [Mon, 6 Jul 2020 21:29:39 +0000 (14:29 -0700)]
net: systemport: Add support for VLAN transmit acceleration

SYSTEMPORT is capable of performing VLAN transmit acceleration, support
that by configuring it appropriately, providing the VLAN ID and PCP/DEI
where necessary.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomptcp: fix race in subflow_data_ready()
Davide Caratti [Mon, 6 Jul 2020 19:06:12 +0000 (21:06 +0200)]
mptcp: fix race in subflow_data_ready()

syzkaller was able to make the kernel reach subflow_data_ready() for a
server subflow that was closed before subflow_finish_connect() completed.
In these cases we can avoid using the path for regular/fallback MPTCP
data, and just wake the main socket, to avoid the following warning:

 WARNING: CPU: 0 PID: 9370 at net/mptcp/subflow.c:885
 subflow_data_ready+0x1e6/0x290 net/mptcp/subflow.c:885
 Kernel panic - not syncing: panic_on_warn set ...
 CPU: 0 PID: 9370 Comm: syz-executor.0 Not tainted 5.7.0 #106
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
 rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
 Call Trace:
  <IRQ>
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0xb7/0xfe lib/dump_stack.c:118
  panic+0x29e/0x692 kernel/panic.c:221
  __warn.cold+0x2f/0x3d kernel/panic.c:582
  report_bug+0x28b/0x2f0 lib/bug.c:195
  fixup_bug arch/x86/kernel/traps.c:105 [inline]
  fixup_bug arch/x86/kernel/traps.c:100 [inline]
  do_error_trap+0x10f/0x180 arch/x86/kernel/traps.c:197
  do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216
  invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:1027
 RIP: 0010:subflow_data_ready+0x1e6/0x290 net/mptcp/subflow.c:885
 Code: 04 02 84 c0 74 06 0f 8e 91 00 00 00 41 0f b6 5e 48 31 ff 83 e3 18
 89 de e8 37 ec 3d fe 84 db 0f 85 65 ff ff ff e8 fa ea 3d fe <0f> 0b e9
 59 ff ff ff e8 ee ea 3d fe 48 89 ee 4c 89 ef e8 f3 77 ff
 RSP: 0018:ffff88811b2099b0 EFLAGS: 00010206
 RAX: ffff888111197000 RBX: 0000000000000000 RCX: ffffffff82fbc609
 RDX: 0000000000000100 RSI: ffffffff82fbc616 RDI: 0000000000000001
 RBP: ffff8881111bc800 R08: ffff888111197000 R09: ffffed10222a82af
 R10: ffff888111541577 R11: ffffed10222a82ae R12: 1ffff11023641336
 R13: ffff888111541000 R14: ffff88810fd4ca00 R15: ffff888111541570
  tcp_child_process+0x754/0x920 net/ipv4/tcp_minisocks.c:841
  tcp_v4_do_rcv+0x749/0x8b0 net/ipv4/tcp_ipv4.c:1642
  tcp_v4_rcv+0x2666/0x2e60 net/ipv4/tcp_ipv4.c:1999
  ip_protocol_deliver_rcu+0x29/0x1f0 net/ipv4/ip_input.c:204
  ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
  NF_HOOK include/linux/netfilter.h:421 [inline]
  ip_local_deliver+0x2da/0x390 net/ipv4/ip_input.c:252
  dst_input include/net/dst.h:441 [inline]
  ip_rcv_finish net/ipv4/ip_input.c:428 [inline]
  ip_rcv_finish net/ipv4/ip_input.c:414 [inline]
  NF_HOOK include/linux/netfilter.h:421 [inline]
  ip_rcv+0xef/0x140 net/ipv4/ip_input.c:539
  __netif_receive_skb_one_core+0x197/0x1e0 net/core/dev.c:5268
  __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5382
  process_backlog+0x1e5/0x6d0 net/core/dev.c:6226
  napi_poll net/core/dev.c:6671 [inline]
  net_rx_action+0x3e3/0xd70 net/core/dev.c:6739
  __do_softirq+0x18c/0x634 kernel/softirq.c:292
  do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
  </IRQ>
  do_softirq.part.0+0x26/0x30 kernel/softirq.c:337
  do_softirq arch/x86/include/asm/preempt.h:26 [inline]
  __local_bh_enable_ip+0x46/0x50 kernel/softirq.c:189
  local_bh_enable include/linux/bottom_half.h:32 [inline]
  rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
  ip_finish_output2+0x78a/0x19c0 net/ipv4/ip_output.c:229
  __ip_finish_output+0x471/0x720 net/ipv4/ip_output.c:306
  dst_output include/net/dst.h:435 [inline]
  ip_local_out+0x181/0x1e0 net/ipv4/ip_output.c:125
  __ip_queue_xmit+0x7a1/0x14e0 net/ipv4/ip_output.c:530
  __tcp_transmit_skb+0x19dc/0x35e0 net/ipv4/tcp_output.c:1238
  __tcp_send_ack.part.0+0x3c2/0x5b0 net/ipv4/tcp_output.c:3785
  __tcp_send_ack net/ipv4/tcp_output.c:3791 [inline]
  tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3791
  tcp_rcv_synsent_state_process net/ipv4/tcp_input.c:6040 [inline]
  tcp_rcv_state_process+0x36a4/0x49c2 net/ipv4/tcp_input.c:6209
  tcp_v4_do_rcv+0x343/0x8b0 net/ipv4/tcp_ipv4.c:1651
  sk_backlog_rcv include/net/sock.h:996 [inline]
  __release_sock+0x1ad/0x310 net/core/sock.c:2548
  release_sock+0x54/0x1a0 net/core/sock.c:3064
  inet_wait_for_connect net/ipv4/af_inet.c:594 [inline]
  __inet_stream_connect+0x57e/0xd50 net/ipv4/af_inet.c:686
  inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:725
  mptcp_stream_connect+0x171/0x5f0 net/mptcp/protocol.c:1920
  __sys_connect_file net/socket.c:1854 [inline]
  __sys_connect+0x267/0x2f0 net/socket.c:1871
  __do_sys_connect net/socket.c:1882 [inline]
  __se_sys_connect net/socket.c:1879 [inline]
  __x64_sys_connect+0x6f/0xb0 net/socket.c:1879
  do_syscall_64+0xb7/0x3d0 arch/x86/entry/common.c:295
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 RIP: 0033:0x7fb577d06469
 Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89
 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01
 f0 ff ff 73 01 c3 48 8b 0d ff 49 2b 00 f7 d8 64 89 01 48
 RSP: 002b:00007fb5783d5dd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
 RAX: ffffffffffffffda RBX: 000000000068bfa0 RCX: 00007fb577d06469
 RDX: 000000000000004d RSI: 0000000020000040 RDI: 0000000000000003
 RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
 R13: 000000000041427c R14: 00007fb5783d65c0 R15: 0000000000000003

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/39
Reported-by: Christoph Paasch <cpaasch@apple.com>
Fixes: e1ff9e82e2ea ("net: mptcp: improve fallback to TCP")
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoReplace HTTP links with HTTPS ones: IPv*
Alexander A. Klimov [Mon, 6 Jul 2020 17:38:50 +0000 (19:38 +0200)]
Replace HTTP links with HTTPS ones: IPv*

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
          If both the HTTP and HTTPS versions
          return 200 OK and serve the same content:
            Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'qed-warnings-cleanup'
David S. Miller [Mon, 6 Jul 2020 20:18:56 +0000 (13:18 -0700)]
Merge branch 'qed-warnings-cleanup'

Alexander Lobakin says:

====================
net: qed/qede: W=1 C=1 warnings cleanup

This set cleans qed/qede build log under W=1 C=1 with GCC 8 and
sparse 0.6.2. The only thing left is "context imbalance -- unexpected
unlock" in one of the source files, which will be issued later during
the refactoring cycles.

The biggest part is handling the endianness warnings. The current code
often just assumes that both host and device operate in LE, which is
obviously incorrect (despite the fact that it's true for x86 platforms),
and makes sparse {s,m}ad.

The rest of the series is mostly random non-functional fixes
here-and-there.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qede: fix BE vs CPU comparison
Alexander Lobakin [Mon, 6 Jul 2020 15:38:21 +0000 (18:38 +0300)]
net: qede: fix BE vs CPU comparison

Flow Dissector's keys are mostly Network / Big Endian. U{16,32}_MAX are
the same in either of byteorders, but let's make sparse happy with
wrapping them into noops.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qede: fix kernel-doc for qede_ptp_adjfreq()
Alexander Lobakin [Mon, 6 Jul 2020 15:38:20 +0000 (18:38 +0300)]
net: qede: fix kernel-doc for qede_ptp_adjfreq()

One of the function arguments was renamed some time ago, but this
wasn't reflected in its kernel-doc comment.
Also add the description for return values.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qed: sanitize BE/LE data processing
Alexander Lobakin [Mon, 6 Jul 2020 15:38:19 +0000 (18:38 +0300)]
net: qed: sanitize BE/LE data processing

Current code assumes that both host and device operates in Little Endian
in lots of places. While this is true for x86 platform, this doesn't mean
we should not care about this.

This commit addresses all parts of the code that were pointed out by sparse
checker. All operations with restricted (__be*/__le*) types are now
protected with explicit from/to CPU conversions, even if they're noops on
common setups.

I'm sure there are more such places, but this implies a deeper code
investigation, and is a subject for future works.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qed: use ptr shortcuts to dedup field accessing in some parts
Alexander Lobakin [Mon, 6 Jul 2020 15:38:18 +0000 (18:38 +0300)]
net: qed: use ptr shortcuts to dedup field accessing in some parts

Use intermediate pointers instead of multiple dereferencing to
simplify and beautify parts of code that will be addressed in
the next commit.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qed: improve indentation of some parts of code
Alexander Lobakin [Mon, 6 Jul 2020 15:38:17 +0000 (18:38 +0300)]
net: qed: improve indentation of some parts of code

To not mix functional and stylistic changes, correct indentation
of code that will be modified in the subsequent commits.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qed: address kernel-doc warnings
Alexander Lobakin [Mon, 6 Jul 2020 15:38:16 +0000 (18:38 +0300)]
net: qed: address kernel-doc warnings

Get rid of the kernel-doc warnings when building with W=1+ by
rewriting the problematic doc comments according to the
recommended format and style.

Note that this only fixes problems found in C source files,
headers aren't in scope for now.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qed: correct qed_hw_err_notify() prototype
Alexander Lobakin [Mon, 6 Jul 2020 15:38:15 +0000 (18:38 +0300)]
net: qed: correct qed_hw_err_notify() prototype

Change the prototype of qed_hw_err_notify() with the following:
* constify "fmt" argument according to printk() declarations;
* anontate it with __cold attribute to move the function out of
  the line;
* annotate it with __printf() attribute;

This eliminates W=1+ warning:

drivers/net/ethernet/qlogic/qed/qed_hw.c: In function
‘qed_hw_err_notify’:
drivers/net/ethernet/qlogic/qed/qed_hw.c:851:3: warning: function
‘qed_hw_err_notify’ might be a candidate for ‘gnu_printf’ format
attribute [-Wsuggest-attribute=format]
 len = vsnprintf(buf, QED_HW_ERR_MAX_STR_SIZE, fmt, vl);
 ^~~

as well as saves some code size:

add/remove: 0/0 grow/shrink: 2/4 up/down: 40/-125 (-85)
Function                                     old     new   delta
qed_dmae_execute_command                    1680    1711     +31
qed_spq_post                                1104    1113      +9
qed_int_sp_dpc                              3554    3545      -9
qed_mcp_cmd_and_union                       1896    1876     -20
qed_hw_err_notify                            395     352     -43
qed_mcp_handle_events                       2630    2577     -53
Total: Before=368645, After=368560, chg -0.02%

__printf() will also be helpful with catching bad format strings
and arguments.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qed: cleanup global structs declarations
Alexander Lobakin [Mon, 6 Jul 2020 15:38:14 +0000 (18:38 +0300)]
net: qed: cleanup global structs declarations

Fix several sparse warnings by moving structs declarations into
the corresponding header files:

drivers/net/ethernet/qlogic/qed/qed_dcbx.c:2402:32: warning:
symbol 'qed_dcbnl_ops_pass' was not declared. Should it be static?

drivers/net/ethernet/qlogic/qed/qed_ll2.c:2754:26: warning: symbol
'qed_ll2_ops_pass' was not declared. Should it be static?

drivers/net/ethernet/qlogic/qed/qed_ptp.c:449:30: warning: symbol
'qed_ptp_ops_pass' was not declared. Should it be static?

drivers/net/ethernet/qlogic/qed/qed_sriov.c:5265:29: warning:
symbol 'qed_iov_ops_pass' was not declared. Should it be static?

(some of them were declared twice in different header files)

Also make qed_hw_err_type_descr[] const while at it.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qed: move static iro_arr[] out of header file
Alexander Lobakin [Mon, 6 Jul 2020 15:38:13 +0000 (18:38 +0300)]
net: qed: move static iro_arr[] out of header file

Static variables (and functions, unless they're inline) should not
be declared in header files.
Move the static array iro_arr[] from "qed_hsi.h" to the sole place
where it's used, "qed_init_ops.c". This eliminates lots of warnings
(42 of them actually) against W=1+:

In file included from drivers/net/ethernet/qlogic/qed/qed.h:51:0,
                 from drivers/net/ethernet/qlogic/qed/qed_ooo.c:40:
drivers/net/ethernet/qlogic/qed/qed_hsi.h:4421:18: warning: 'iro_arr'
defined but not used [-Wunused-const-variable=]
 static const u32 iro_arr[] = {
                  ^~~~~~~

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agogeneve: move all configuration under struct geneve_config
Sabrina Dubroca [Mon, 6 Jul 2020 15:18:08 +0000 (17:18 +0200)]
geneve: move all configuration under struct geneve_config

This patch adds a new structure geneve_config and moves the per-device
configuration attributes to it, like we already have in VXLAN with
struct vxlan_config. This ends up being pretty invasive since those
attributes are used everywhere.

This allows us to clean up the argument lists for geneve_configure (4
arguments instead of 8) and geneve_nl2info (5 instead of 9).

This also reduces the copy-paste of code setting those attributes
between geneve_configure and geneve_changelink to a single memcpy,
which would have avoided the bug fixed in commit
56c09de347e4 ("geneve: allow changing DF behavior after creation").

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodpaa2-eth: fix draining of S/G cache
Ioana Ciornei [Mon, 6 Jul 2020 14:55:54 +0000 (17:55 +0300)]
dpaa2-eth: fix draining of S/G cache

On link down, the draining of the S/G cache should be done on all
_possible_ CPUs not just the ones that are online in that moment.
Fix this by changing the iterator.

Fixes: d70446ee1f40 ("dpaa2-eth: send a scatter-gather FD instead of realloc-ing")
Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/amd: Remove needless assignment and the extra brank lines
Tang Bin [Mon, 6 Jul 2020 14:47:01 +0000 (22:47 +0800)]
net/amd: Remove needless assignment and the extra brank lines

The variable 'err = -ENODEV;' in au1000_probe() is
duplicate, so remove redundant one. And remove the
extra blank lines in the file au1000_eth.c

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoselftests: mptcp: capture pcap on both sides
Matthieu Baerts [Mon, 6 Jul 2020 12:44:08 +0000 (14:44 +0200)]
selftests: mptcp: capture pcap on both sides

When investigating performance issues that involve latency / loss /
reordering it is useful to have the pcap from the sender-side as it
allows to easier infer the state of the sender's congestion-control,
loss-recovery, etc.

Allow the selftests to capture a pcap on both sender and receiver so
that this information is not lost when reproducing.

This patch also improves the file names. Instead of:

  ns4-5ee79a56-X4O6gS-ns3-5ee79a56-X4O6gS-MPTCP-MPTCP-10.0.3.1.pcap

We now have something like for the same test:

  5ee79a56-X4O6gS-ns3-ns4-MPTCP-MPTCP-10.0.3.1-10030-connector.pcap
  5ee79a56-X4O6gS-ns3-ns4-MPTCP-MPTCP-10.0.3.1-10030-listener.pcap

It was a connection from ns3 to ns4, better to start with ns3 then. The
port is also added, easier to find the trace we want.

Co-developed-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'ethernet-sun-use-generic-power-management'
David S. Miller [Mon, 6 Jul 2020 19:24:15 +0000 (12:24 -0700)]
Merge branch 'ethernet-sun-use-generic-power-management'

Vaibhav Gupta says:

====================
ethernet: sun: use generic power management

Linux Kernel Mentee: Remove Legacy Power Management.

The purpose of this patch series is to remove legacy power management callbacks
from sun ethernet drivers.

The callbacks performing suspend() and resume() operations are still calling
pci_save_state(), pci_set_power_state(), etc. and handling the power management
themselves, which is not recommended.

The conversion requires the removal of the those function calls and change the
callback definition accordingly and make use of dev_pm_ops structure.

All patches are compile-tested only.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosun/cassini: use generic power management
Vaibhav Gupta [Mon, 6 Jul 2020 08:57:46 +0000 (14:27 +0530)]
sun/cassini: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosun/niu: use generic power management
Vaibhav Gupta [Mon, 6 Jul 2020 08:57:45 +0000 (14:27 +0530)]
sun/niu: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

The driver was calling pci_save/restore_state() which is no more needed.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosun/sungem: use generic power management
Vaibhav Gupta [Mon, 6 Jul 2020 08:57:44 +0000 (14:27 +0530)]
sun/sungem: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states. And they use PCI
helper functions to do it.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

In this driver:
gem_suspend() calls gem_do_stop() which in turn invokes
pci_disable_device(). As the PCI helper function is not called at the
end/start of the function body, breaking the function in two parts
may change its behavior.

The only other function invoking gem_do_stop() is gem_close(). Hence,
gem_close() and gem_suspend() can do the required end steps on their own.

The same case is with gem_resume(). Both gem_resume() and gem_open()
invoke gem_do_start(). Again, make the caller functions do the required
steps on their own.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: vitesse-vsc73xx: Convert to plain comments to avoid kerneldoc warnings
Andrew Lunn [Sun, 5 Jul 2020 21:05:08 +0000 (23:05 +0200)]
net: dsa: vitesse-vsc73xx: Convert to plain comments to avoid kerneldoc warnings

The comments before struct vsc73xx_platform and struct vsc73xx_spi use
kerneldoc format, but then fail to document the members of these
structures. All the structure members are self evident, and the driver
has not other kerneldoc comments, so change these to plain comments to
avoid warnings.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: lan9303: fix variable 'res' set but not used
Andrew Lunn [Sun, 5 Jul 2020 20:55:55 +0000 (22:55 +0200)]
net: dsa: lan9303: fix variable 'res' set but not used

Since lan9303_adjust_link() is a void function, there is no option to
return an error. So just remove the variable and lets any errors be
discarded.

Cc: Egil Hjelmeland <privat@egil-hjelmeland.no>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: rtl8366: Pass GENMASK() signed bits
Andrew Lunn [Sun, 5 Jul 2020 20:42:27 +0000 (22:42 +0200)]
net: dsa: rtl8366: Pass GENMASK() signed bits

Oddly, GENMASK() requires signed bit numbers, so that it can compare
them for < 0. If passed an unsigned type, we get warnings about the
test never being true.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net-dsa-b53-sf2-warn'
David S. Miller [Sun, 5 Jul 2020 22:45:38 +0000 (15:45 -0700)]
Merge branch 'net-dsa-b53-sf2-warn'

Andrew Lunn says:

====================
dsa: b53/sf2

Fixup most of the C=1 W=1 warnings in these drivers.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: bcm_sf2: Pass GENMASK() signed bits
Andrew Lunn [Sun, 5 Jul 2020 20:36:25 +0000 (22:36 +0200)]
net: dsa: bcm_sf2: Pass GENMASK() signed bits

Oddly, GENMASK() requires signed bit numbers, so that it can compare
them for < 0. If passed an unsigned type, we get warnings about the
test never being true. There is no danger of overflow here, udf is
always a u8, so there is plenty of space when expanding to an int.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: bcm_sf2: Initialize __be16 with a __be16 value
Andrew Lunn [Sun, 5 Jul 2020 20:36:24 +0000 (22:36 +0200)]
net: dsa: bcm_sf2: Initialize __be16 with a __be16 value

A __be16 variable should be initialised with a __be16 value.  So add a
htons(). In this case it is pointless, given the value being assigned
is 0xffff, but it stops sparse from warnings.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: b53: Fixup endianness warnings
Andrew Lunn [Sun, 5 Jul 2020 20:36:23 +0000 (22:36 +0200)]
net: dsa: b53: Fixup endianness warnings

leX_to_cpu() expects to be passed an __leX type.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net--dsa-mv88e6xxx-warn'
David S. Miller [Sun, 5 Jul 2020 22:43:01 +0000 (15:43 -0700)]
Merge branch 'net--dsa-mv88e6xxx-warn'

Andrew Lunn says:

====================
net: dsa: mv88e6xxx: Fixup C=1 W=1 warnings

Make the mv88e6xxx driver build cleanly with C=1 W=1.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: mv88e6xxx: scratch: Fixup kerneldoc
Andrew Lunn [Sun, 5 Jul 2020 19:38:10 +0000 (21:38 +0200)]
net: dsa: mv88e6xxx: scratch: Fixup kerneldoc

Correct parameters and add the missing ones.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: mv88e6xxx: Remove set but unused variable
Andrew Lunn [Sun, 5 Jul 2020 19:38:09 +0000 (21:38 +0200)]
net: dsa: mv88e6xxx: Remove set but unused variable

We don't act on any errors reading registers while handling watchdog
interrupt. Since this is an interrupt handler, we cannot return such
errors. So just remove the variable.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: mv88e6xxx: vlan_tci is __be16
Andrew Lunn [Sun, 5 Jul 2020 19:38:08 +0000 (21:38 +0200)]
net: dsa: mv88e6xxx: vlan_tci is __be16

The flow spec member vlan_tci is in network order. Hence comparisons
should be made again network order values.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: mv88e6xxx: Fix sparse warnings from GENMASK
Andrew Lunn [Sun, 5 Jul 2020 19:38:07 +0000 (21:38 +0200)]
net: dsa: mv88e6xxx: Fix sparse warnings from GENMASK

Oddly, GENMASK() requires signed bit numbers, so that it can compare
them for < 0. If passed an unsigned type, we get warnings about the
test never being true.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net-dsa-warnings'
David S. Miller [Sun, 5 Jul 2020 22:31:58 +0000 (15:31 -0700)]
Merge branch 'net-dsa-warnings'

Andrew Lunn says:

====================
net: dsa: Fix C=1 W=1 warnings

Mostly not using __be16 when decoding packet contents.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: tag_qca.c: Fix warning for __be16 vs u16
Andrew Lunn [Sun, 5 Jul 2020 19:30:08 +0000 (21:30 +0200)]
net: dsa: tag_qca.c: Fix warning for __be16 vs u16

net/dsa/tag_qca.c:48:15: warning: incorrect type in assignment (different base types)
net/dsa/tag_qca.c:48:15:    expected unsigned short [usertype]
net/dsa/tag_qca.c:48:15:    got restricted __be16 [usertype]
net/dsa/tag_qca.c:68:13: warning: incorrect type in assignment (different base types)
net/dsa/tag_qca.c:68:13:    expected restricted __be16 [usertype] hdr
net/dsa/tag_qca.c:68:13:    got int
net/dsa/tag_qca.c:71:16: warning: restricted __be16 degrades to integer
net/dsa/tag_qca.c:81:17: warning: restricted __be16 degrades to integer

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: tag_mtk: Fix warnings for __be16
Andrew Lunn [Sun, 5 Jul 2020 19:30:07 +0000 (21:30 +0200)]
net: dsa: tag_mtk: Fix warnings for __be16

net/dsa/tag_mtk.c:84:13: warning: incorrect type in assignment (different base types)
net/dsa/tag_mtk.c:84:13:    expected restricted __be16 [usertype] hdr
net/dsa/tag_mtk.c:84:13:    got int
net/dsa/tag_mtk.c:94:17: warning: restricted __be16 degrades to integer

The result of a ntohs() is not __be16, but u16.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: tag_lan9303: Fix __be16 warnings
Andrew Lunn [Sun, 5 Jul 2020 19:30:06 +0000 (21:30 +0200)]
net: dsa: tag_lan9303: Fix __be16 warnings

net/dsa/tag_lan9303.c:76:24: warning: incorrect type in assignment (different base types)
net/dsa/tag_lan9303.c:76:24:    expected unsigned short [usertype]
net/dsa/tag_lan9303.c:76:24:    got restricted __be16 [usertype]
net/dsa/tag_lan9303.c:80:24: warning: incorrect type in assignment (different base types)
net/dsa/tag_lan9303.c:80:24:    expected unsigned short [usertype]
net/dsa/tag_lan9303.c:80:24:    got restricted __be16 [usertype]
net/dsa/tag_lan9303.c:106:31: warning: restricted __be16 degrades to integer
net/dsa/tag_lan9303.c:111:24: warning: cast to restricted __be16
net/dsa/tag_lan9303.c:111:24: warning: cast to restricted __be16
net/dsa/tag_lan9303.c:111:24: warning: cast to restricted __be16
net/dsa/tag_lan9303.c:111:24: warning: cast to restricted __be16

Make use of __be16 where appropriate to fix these warnings.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: tag_ksz: Fix __be16 warnings
Andrew Lunn [Sun, 5 Jul 2020 19:30:05 +0000 (21:30 +0200)]
net: dsa: tag_ksz: Fix __be16 warnings

cpu_to_be16 returns a __be16 value. So what it is assigned to needs to
have the same type to avoid warnings.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: Add __percpu property to prevent warnings
Andrew Lunn [Sun, 5 Jul 2020 19:30:04 +0000 (21:30 +0200)]
net: dsa: Add __percpu property to prevent warnings

net/dsa/slave.c:505:13: warning: incorrect type in initializer (different address spaces)
net/dsa/slave.c:505:13:    expected void const [noderef] <asn:3> *__vpp_verify
net/dsa/slave.c:505:13:    got struct pcpu_sw_netstats *

Add the needed _percpu property to prevent this warning.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'Phylink-integration-improvements-for-Felix-DSA-driver'
David S. Miller [Sun, 5 Jul 2020 22:25:59 +0000 (15:25 -0700)]
Merge branch 'Phylink-integration-improvements-for-Felix-DSA-driver'

Vladimir Oltean says:

====================
Phylink integration improvements for Felix DSA driver

This is an overhaul of the Felix switch driver's phylink operations.

Patches 1, 3, 4 and 5 are cleanup, patch 2 is adding a new feature and
and patch 6 is adaptation to the new format of an existing phylink API
(mac_link_up).

Changes since v2:
- Replaced "PHYLINK" with "phylink".
- Rewrote commit message of patch 5/6.

Changes since v1:
- Now using phy_clear_bits and phy_set_bits instead of plain writes to
  MII_BMCR. This combines former patches 1/7 and 6/7 into a single new
  patch 1/6.
- Updated commit message of patch 5/6.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: felix: use resolved link config in mac_link_up()
Vladimir Oltean [Sun, 5 Jul 2020 16:16:26 +0000 (19:16 +0300)]
net: dsa: felix: use resolved link config in mac_link_up()

Phylink now requires that parameters established through
auto-negotiation be written into the MAC at the time of the
mac_link_up() callback. In the case of felix, that means taking the port
out of reset, setting the correct timers for PAUSE frames, and
enabling/disabling TX flow control.

This patch also splits the inband and noinband configuration of the
vsc9959 PCS (currently found in a function called "init") into 2
different functions, which have a nomenclature closer to phylink:
"config", for inband setup, and "link_up", for noinband (forced) setup.

This is necessary as a preparation step for giving up control of the PCS
to phylink, which will be done in further patch series.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: felix: delete .phylink_mac_an_restart code
Vladimir Oltean [Sun, 5 Jul 2020 16:16:25 +0000 (19:16 +0300)]
net: dsa: felix: delete .phylink_mac_an_restart code

Phylink uses the .mac_an_restart method to offer the user an
implementation of the "ethtool -r" behavior, when the media-side auto
negotiation can be restarted by the local MAC PCS. This is the case for
fiber modes 1000Base-X and 2500Base-X (IEEE clause 37) that don't have
an Ethernet PHY connected locally, and the media is connected to the MAC
PCS directly.

On the other hand, the Cisco SGMII and USXGMII standards also have an
auto negotiation mechanism based on IEEE 802.3 clause 37 (their
respective specs require a MAC PCS and a PHY PCS to implement the same
state machine, which is described in IEEE 802.3 "Auto-Negotiation Figure
37-6"), so the ability to restart auto-negotiation is intrinsically
symmetrical (the MAC PCS can do it too).

However, it appears that not all SGMII/USXGMII PHYs have logic to
restart the MDI-side auto-negotiation process when they detect a
transition of the SGMII link from data mode to configuration mode.
Some do (VSC8234) and some don't (AR8033, MV88E1111). IEEE and/or Cisco
specification wordings to not help to prove whether propagating the "AN
restart" event from MII side ("mr_restart_an") to MDI side
("mr_restart_negotiation") is required behavior - neither of them
specifies any mandatory interaction between the clause 37 AN state
machine from Figure 37-6 and the clause 28 AN state machine from Figure
28-18.

Therefore, even if a certain behavior could be proven as being required,
real-life SGMII/USXGMII PHYs are inconsistent enough that a clause 37 AN
restart cannot be used by phylink to reliably trigger a media-side
renegotiation, when the user requests it via ethtool.

The only remaining use that the .mac_an_restart callback might possibly
have, given what we know now, is to implement some silicon quirks, but
so far that has proven to not be necessary.

So remove this code for now, since it never gets called and we don't
foresee any circumstance in which it might be, either.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: felix: set proper pause frame timers based on link speed
Vladimir Oltean [Sun, 5 Jul 2020 16:16:24 +0000 (19:16 +0300)]
net: dsa: felix: set proper pause frame timers based on link speed

state->speed holds a value of 10, 100, 1000 or 2500, but
SYS_MAC_FC_CFG_FC_LINK_SPEED expects a value in the range 0, 1, 2 or 3.

So set the correct speed encoding into this register.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: felix: unconditionally configure MAC speed to 1000Mbps
Vladimir Oltean [Sun, 5 Jul 2020 16:16:23 +0000 (19:16 +0300)]
net: dsa: felix: unconditionally configure MAC speed to 1000Mbps

In VSC9959, the PCS is the one who performs rate adaptation (symbol
duplication) to the speed negotiated by the PHY. The MAC is unaware of
that and must remain configured for gigabit. If it is configured at
OCELOT_SPEED_10 or OCELOT_SPEED_100, it'll start transmitting PAUSE
frames out of control and never recover, _even if_ we then reconfigure
it at OCELOT_SPEED_1000 afterwards.

This patch fixes a bug that luckily did not have any functional impact.
We were writing 10, 100, 1000 etc into this 2-bit field in
DEV_CLOCK_CFG, but the hardware expects values in the range 0, 1, 2, 3.
So all speed values were getting truncated to 0, which is
OCELOT_SPEED_2500, and which also appears to be fine.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: felix: support half-duplex link modes
Vladimir Oltean [Sun, 5 Jul 2020 16:16:22 +0000 (19:16 +0300)]
net: dsa: felix: support half-duplex link modes

Ping tested:

  [   11.808455] mscc_felix 0000:00:00.5 swp0: Link is Up - 1Gbps/Full - flow control rx/tx
  [   11.816497] IPv6: ADDRCONF(NETDEV_CHANGE): swp0: link becomes ready

  [root@LS1028ARDB ~] # ethtool -s swp0 advertise 0x4
  [   18.844591] mscc_felix 0000:00:00.5 swp0: Link is Down
  [   22.048337] mscc_felix 0000:00:00.5 swp0: Link is Up - 100Mbps/Half - flow control off

  [root@LS1028ARDB ~] # ip addr add 192.168.1.1/24 dev swp0

  [root@LS1028ARDB ~] # ping 192.168.1.2
  PING 192.168.1.2 (192.168.1.2): 56 data bytes
  (...)
  ^C--- 192.168.1.2 ping statistics ---
  3 packets transmitted, 3 packets received, 0% packet loss
  round-trip min/avg/max = 0.383/0.611/1.051 ms

  [root@LS1028ARDB ~] # ethtool -s swp0 advertise 0x10
  [  355.637747] mscc_felix 0000:00:00.5 swp0: Link is Down
  [  358.788034] mscc_felix 0000:00:00.5 swp0: Link is Up - 1Gbps/Half - flow control off

  [root@LS1028ARDB ~] # ping 192.168.1.2
  PING 192.168.1.2 (192.168.1.2): 56 data bytes
  (...)
  ^C
  --- 192.168.1.2 ping statistics ---
  16 packets transmitted, 16 packets received, 0% packet loss
  round-trip min/avg/max = 0.301/0.384/1.138 ms

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: felix: clarify the intention of writes to MII_BMCR
Vladimir Oltean [Sun, 5 Jul 2020 16:16:21 +0000 (19:16 +0300)]
net: dsa: felix: clarify the intention of writes to MII_BMCR

The driver appears to write to BMCR_SPEED and BMCR_DUPLEX, fields which
are read-only, since they are actually configured through the
vendor-specific IF_MODE (0x14) register.

But the reason we're writing back the read-only values of MII_BMCR is to
alter these writable fields:

BMCR_RESET
BMCR_LOOPBACK
BMCR_ANENABLE
BMCR_PDOWN
BMCR_ISOLATE
BMCR_ANRESTART

In particular, the only field which is really relevant to this driver is
BMCR_ANENABLE. Clarify that intention by spelling it out, using
phy_set_bits and phy_clear_bits.

The driver also made a few writes to BMCR_RESET and BMCR_ANRESTART which
are unnecessary and may temporarily disrupt the link to the PHY. Remove
them.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'qlogic-use-generic-power-management'
David S. Miller [Sun, 5 Jul 2020 01:02:06 +0000 (18:02 -0700)]
Merge branch 'qlogic-use-generic-power-management'

Vaibhav Gupta says:

====================
qlogic: use generic power management

Linux Kernel Mentee: Remove Legacy Power Management.

The purpose of this patch series is to remove legacy power management callbacks
from qlogic ethernet drivers.

The callbacks performing suspend() and resume() operations are still calling
pci_save_state(), pci_set_power_state(), etc. and handling the power management
themselves, which is not recommended.

The conversion requires the removal of the those function calls and change the
callback definition accordingly and make use of dev_pm_ops structure.

All patches are compile-tested only.

V2: Fix unused variable warning in v1.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoqlcninc: use generic power management
Vaibhav Gupta [Thu, 2 Jul 2020 17:01:43 +0000 (22:31 +0530)]
qlcninc: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and taking care of register states. And they use PCI
helper functions to do it.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

.suspend() calls __qlcnic_shutdown, which then calls qlcnic_82xx_shutdown;
.resume()  calls __qlcnic_resume,   which then calls qlcnic_82xx_resume;

Both ...82xx..() are define in
drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c and are used only in
drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c.

Hence upgrade them and remove PCI function calls, like pci_save_state() and
pci_enable_wake(), inside them

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonetxen_nic: use generic power management
Vaibhav Gupta [Thu, 2 Jul 2020 17:01:42 +0000 (22:31 +0530)]
netxen_nic: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states. And they use PCI
helper functions to do it.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

In this driver:
netxen_nic_resume() calls netxen_nic_attach_func() which then invokes PCI
helper functions like pci_enable_device(), pci_set_power_state() and
pci_restore_state(). Other function:
 - netxen_io_slot_reset()
also calls netxen_nic_attach_func().

Also, netxen_io_slot_reset() returns specific value based on the return value
of netxen_nic_attach_func() as whole. Thus, cannot simply move some piece of
code from netxen_nic_attach_func() to it.

Hence, define a new function netxen_nic_attach_late_func() to do the tasks
which has to be done after PCI helper functions have done their job.

Now, netxen_nic_attach_func() invokes netxen_nic_attach_late_func(), thus
netxen_io_slot_reset() behaves normally.
And, netxen_nic_resume() calls netxen_nic_attach_late_func() to avoid PCI
helper functions calls.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: microchip: remove unused private members
Codrin Ciubotariu [Thu, 2 Jul 2020 15:17:24 +0000 (18:17 +0300)]
net: dsa: microchip: remove unused private members

Private structure members live_ports, on_ports, rx_ports, tx_ports are
initialized but not used anywhere. Let's remove them.

Suggested-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>