Yuya Kusakabe [Tue, 25 Feb 2020 03:32:11 +0000 (12:32 +0900)]
virtio_net: Keep vnet header zeroed if XDP is loaded for small buffer
We do not want to care about the vnet header in receive_small() if XDP
is loaded, since we can not know whether or not the packet is modified
by XDP.
Fixes: f6b10209b90d ("virtio-net: switch to use build_skb() for small buffer") Signed-off-by: Yuya Kusakabe <yuya.kusakabe@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jason Wang <jasowang@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Link: https://lore.kernel.org/bpf/20200225033212.437563-1-yuya.kusakabe@gmail.com
Andrii Nakryiko [Tue, 25 Feb 2020 00:08:47 +0000 (16:08 -0800)]
selftests/bpf: Print backtrace on SIGSEGV in test_progs
Due to various bugs in tests clean up code (usually), if host system is
misconfigured, it happens that test_progs will just crash in the middle of
running a test with little to no indication of where and why the crash
happened. For cases where coredump is not readily available (e.g., inside
a CI), it's very helpful to have a stack trace, which lead to crash, to be
printed out. This change adds a signal handler that will capture and print out
symbolized backtrace:
Unfortunately, glibc's symbolization support is unable to symbolize static
functions, only global ones will be present in stack trace. But it's still a
step forward without adding extra libraries to get a better symbolization.
Jakub Sitnicki [Mon, 24 Feb 2020 13:53:27 +0000 (14:53 +0100)]
selftests/bpf: Run SYN cookies with reuseport BPF test only for TCP
Currently we run SYN cookies test for all socket types and mark the test as
skipped if socket type is not compatible. This causes confusion because
skipped test might indicate a problem with the testing environment.
Instead, run the test only for the socket type which supports SYN cookies.
Also, switch to using designated initializers when setting up tests, so
that we can tweak only some test parameters, leaving the rest initialized
to default values.
Fixes: eecd618b4516 ("selftests/bpf: Mark SYN cookie test skipped for UDP sockets") Reported-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200224135327.121542-2-jakub@cloudflare.com
Jakub Sitnicki [Mon, 24 Feb 2020 13:53:26 +0000 (14:53 +0100)]
selftests/bpf: Run reuseport tests only with supported socket types
SOCKMAP and SOCKHASH map types can be used with reuseport BPF programs but
don't support yet storing UDP sockets. Instead of marking UDP tests with
SOCK{MAP,HASH} as skipped, don't run them at all.
Skipped test might signal that the test environment is not suitable for
running the test, while in reality the functionality is not implemented in
the kernel yet.
====================
This is the third version of the BPF/RT patch set which makes both coexist
nicely. The long explanation can be found in the cover letter of the V1
submission:
- Rebased to bpf-next, adjusted to the lock changes in the hashmap code.
- Split the preallocation enforcement patch for instrumentation type BPF
programs into two pieces:
1) Emit a one-time warning on !RT kernels when any instrumentation type
BPF program uses run-time allocation. Emit also a corresponding
warning in the verifier log. But allow the program to run for
backward compatibility sake. After a grace period this should be
enforced.
2) On RT reject such programs because on RT the memory allocator cannot
be called from truly atomic contexts.
- Fixed the fallout from V2 as reported by Alexei and 0-day
- Removed the redundant preempt_disable() from trace_call_bpf()
- Removed the unused export of trace_call_bpf()
====================
David Miller [Mon, 24 Feb 2020 14:01:53 +0000 (15:01 +0100)]
bpf/stackmap: Dont trylock mmap_sem with PREEMPT_RT and interrupts disabled
In a RT kernel down_read_trylock() cannot be used from NMI context and
up_read_non_owner() is another problematic issue.
So in such a configuration, simply elide the annotated stackmap and
just report the raw IPs.
In the longer term, it might be possible to provide a atomic friendly
versions of the page cache traversal which will at least provide the info
if the pages are resident and don't need to be paged in.
[ tglx: Use IS_ENABLED() to avoid the #ifdeffery, fixup the irq work
callback and add a comment ]
Thomas Gleixner [Mon, 24 Feb 2020 14:01:52 +0000 (15:01 +0100)]
bpf, lpm: Make locking RT friendly
The LPM trie map cannot be used in contexts like perf, kprobes and tracing
as this map type dynamically allocates memory.
The memory allocation happens with a raw spinlock held which is a truly
spinning lock on a PREEMPT RT enabled kernel which disables preemption and
interrupts.
As RT does not allow memory allocation from such a section for various
reasons, convert the raw spinlock to a regular spinlock.
On a RT enabled kernel these locks are substituted by 'sleeping' spinlocks
which provide the proper protection but keep the code preemptible.
On a non-RT kernel regular spinlocks map to raw spinlocks, i.e. this does
not cause any functional change.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:51 +0000 (15:01 +0100)]
bpf: Prepare hashtab locking for PREEMPT_RT
PREEMPT_RT forbids certain operations like memory allocations (even with
GFP_ATOMIC) from atomic contexts. This is required because even with
GFP_ATOMIC the memory allocator calls into code pathes which acquire locks
with long held lock sections. To ensure the deterministic behaviour these
locks are regular spinlocks, which are converted to 'sleepable' spinlocks
on RT. The only true atomic contexts on an RT kernel are the low level
hardware handling, scheduling, low level interrupt handling, NMIs etc. None
of these contexts should ever do memory allocations.
As regular device interrupt handlers and soft interrupts are forced into
thread context, the existing code which does
spin_lock*(); alloc(GPF_ATOMIC); spin_unlock*();
just works.
In theory the BPF locks could be converted to regular spinlocks as well,
but the bucket locks and percpu_freelist locks can be taken from arbitrary
contexts (perf, kprobes, tracepoints) which are required to be atomic
contexts even on RT. These mechanisms require preallocated maps, so there
is no need to invoke memory allocations within the lock held sections.
BPF maps which need dynamic allocation are only used from (forced) thread
context on RT and can therefore use regular spinlocks which in turn allows
to invoke memory allocations from the lock held section.
To achieve this make the hash bucket lock a union of a raw and a regular
spinlock and initialize and lock/unlock either the raw spinlock for
preallocated maps or the regular variant for maps which require memory
allocations.
On a non RT kernel this distinction is neither possible nor required.
spinlock maps to raw_spinlock and the extra code and conditional is
optimized out by the compiler. No functional change.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:50 +0000 (15:01 +0100)]
bpf: Factor out hashtab bucket lock operations
As a preparation for making the BPF locking RT friendly, factor out the
hash bucket lock operations into inline functions. This allows to do the
necessary RT modification in one place instead of sprinkling it all over
the place. No functional change.
The now unused htab argument of the lock/unlock functions will be used in
the next step which adds PREEMPT_RT support.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:49 +0000 (15:01 +0100)]
bpf: Replace open coded recursion prevention in sys_bpf()
The required protection is that the caller cannot be migrated to a
different CPU as these functions end up in places which take either a hash
bucket lock or might trigger a kprobe inside the memory allocator. Both
scenarios can lead to deadlocks. The deadlock prevention is per CPU by
incrementing a per CPU variable which temporarily blocks the invocation of
BPF programs from perf and kprobes.
Replace the open coded preempt_[dis|en]able and __this_cpu_[inc|dec] pairs
with the new helper functions. These functions are already prepared to make
BPF work on PREEMPT_RT enabled kernels. No functional change for !RT
kernels.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:48 +0000 (15:01 +0100)]
bpf: Use recursion prevention helpers in hashtab code
The required protection is that the caller cannot be migrated to a
different CPU as these places take either a hash bucket lock or might
trigger a kprobe inside the memory allocator. Both scenarios can lead to
deadlocks. The deadlock prevention is per CPU by incrementing a per CPU
variable which temporarily blocks the invocation of BPF programs from perf
and kprobes.
Replace the open coded preempt_disable/enable() and this_cpu_inc/dec()
pairs with the new recursion prevention helpers to prepare BPF to work on
PREEMPT_RT enabled kernels. On a non-RT kernel the migrate disable/enable
in the helpers map to preempt_disable/enable(), i.e. no functional change.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:47 +0000 (15:01 +0100)]
bpf: Provide recursion prevention helpers
The places which need to prevent the execution of trace type BPF programs
to prevent deadlocks on the hash bucket lock do this open coded.
Provide two inline functions, bpf_disable/enable_instrumentation() to
replace these open coded protection constructs.
Use migrate_disable/enable() instead of preempt_disable/enable() right away
so this works on RT enabled kernels. On a !RT kernel migrate_disable /
enable() are mapped to preempt_disable/enable().
These helpers use this_cpu_inc/dec() instead of __this_cpu_inc/dec() on an
RT enabled kernel because migrate disabled regions are preemptible and
preemption might hit in the middle of a RMW operation which can lead to
inconsistent state.
David Miller [Mon, 24 Feb 2020 14:01:46 +0000 (15:01 +0100)]
bpf: Use migrate_disable/enable in array macros and cgroup/lirc code.
Replace the preemption disable/enable with migrate_disable/enable() to
reflect the actual requirement and to allow PREEMPT_RT to substitute it
with an actual migration disable mechanism which does not disable
preemption.
Including the code paths that go via __bpf_prog_run_save_cb().
David Miller [Mon, 24 Feb 2020 14:01:45 +0000 (15:01 +0100)]
bpf: Use migrate_disable/enabe() in trampoline code.
Instead of preemption disable/enable to reflect the purpose. This allows
PREEMPT_RT to substitute it with an actual migration disable
implementation. On non RT kernels this is still mapped to
preempt_disable/enable().
David Miller [Mon, 24 Feb 2020 14:01:44 +0000 (15:01 +0100)]
bpf/tests: Use migrate disable instead of preempt disable
Replace the preemption disable/enable with migrate_disable/enable() to
reflect the actual requirement and to allow PREEMPT_RT to substitute it
with an actual migration disable mechanism which does not disable
preemption.
On non RT enabled kernels this maps to preempt_disable/enable() and on RT
enabled kernels this solely prevents migration, which is sufficient as
there is no requirement to prevent reentrancy to any BPF program from a
preempting task. The only requirement is that the program stays on the same
CPU.
Therefore, this is a trivially correct transformation.
The seccomp loop does not need protection over the loop. It only needs
protection per BPF filter program
Thomas Gleixner [Mon, 24 Feb 2020 14:01:42 +0000 (15:01 +0100)]
bpf: Replace cant_sleep() with cant_migrate()
As already discussed in the previous change which introduced
BPF_RUN_PROG_PIN_ON_CPU() BPF only requires to disable migration to
guarantee per CPUness.
If RT substitutes the preempt disable based migration protection then the
cant_sleep() check will obviously trigger as preemption is not disabled.
Replace it by cant_migrate() which maps to cant_sleep() on a non RT kernel
and will verify that migration is disabled on a full RT kernel.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:41 +0000 (15:01 +0100)]
bpf: Provide bpf_prog_run_pin_on_cpu() helper
BPF programs require to run on one CPU to completion as they use per CPU
storage, but according to Alexei they don't need reentrancy protection as
obviously BPF programs running in thread context can always be 'preempted'
by hard and soft interrupts and instrumentation and the same program can
run concurrently on a different CPU.
The currently used mechanism to ensure CPUness is to wrap the invocation
into a preempt_disable/enable() pair. Disabling preemption is also
disabling migration for a task.
preempt_disable/enable() is used because there is no explicit way to
reliably disable only migration.
Provide a separate macro to invoke a BPF program which can be used in
migrateable task context.
It wraps BPF_PROG_RUN() in a migrate_disable/enable() pair which maps on
non RT enabled kernels to preempt_disable/enable(). On RT enabled kernels
this merely disables migration. Both methods ensure that the invoked BPF
program runs on one CPU to completion.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:40 +0000 (15:01 +0100)]
bpf: Dont iterate over possible CPUs with interrupts disabled
pcpu_freelist_populate() is disabling interrupts and then iterates over the
possible CPUs. The reason why this disables interrupts is to silence
lockdep because the invoked ___pcpu_freelist_push() takes spin locks.
Neither the interrupt disabling nor the locking are required in this
function because it's called during initialization and the resulting map is
not yet visible to anything.
Split out the actual push assignement into an inline, call it from the loop
and remove the interrupt disable.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:39 +0000 (15:01 +0100)]
bpf: Remove recursion prevention from rcu free callback
If an element is freed via RCU then recursion into BPF instrumentation
functions is not a concern. The element is already detached from the map
and the RCU callback does not hold any locks on which a kprobe, perf event
or tracepoint attached BPF program could deadlock.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:38 +0000 (15:01 +0100)]
perf/bpf: Remove preempt disable around BPF invocation
The BPF invocation from the perf event overflow handler does not require to
disable preemption because this is called from NMI or at least hard
interrupt context which is already non-preemptible.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:37 +0000 (15:01 +0100)]
bpf/trace: Remove redundant preempt_disable from trace_call_bpf()
Similar to __bpf_trace_run this is redundant because __bpf_trace_run() is
invoked from a trace point via __DO_TRACE() which already disables
preemption _before_ invoking any of the functions which are attached to a
trace point.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:35 +0000 (15:01 +0100)]
bpf/tracing: Remove redundant preempt_disable() in __bpf_trace_run()
__bpf_trace_run() disables preemption around the BPF_PROG_RUN() invocation.
This is redundant because __bpf_trace_run() is invoked from a trace point
via __DO_TRACE() which already disables preemption _before_ invoking any of
the functions which are attached to a trace point.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:34 +0000 (15:01 +0100)]
bpf: Update locking comment in hashtab code
The comment where the bucket lock is acquired says:
/* bpf_map_update_elem() can be called in_irq() */
which is not really helpful and aside of that it does not explain the
subtle details of the hash bucket locks expecially in the context of BPF
and perf, kprobes and tracing.
Add a comment at the top of the file which explains the protection scopes
and the details how potential deadlocks are prevented.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:33 +0000 (15:01 +0100)]
bpf: Enforce preallocation for instrumentation programs on RT
Aside of the general unsafety of run-time map allocation for
instrumentation type programs RT enabled kernels have another constraint:
The instrumentation programs are invoked with preemption disabled, but the
memory allocator spinlocks cannot be acquired in atomic context because
they are converted to 'sleeping' spinlocks on RT.
Therefore enforce map preallocation for these programs types when RT is
enabled.
Thomas Gleixner [Mon, 24 Feb 2020 14:01:32 +0000 (15:01 +0100)]
bpf: Tighten the requirements for preallocated hash maps
The assumption that only programs attached to perf NMI events can deadlock
on memory allocators is wrong. Assume the following simplified callchain:
kmalloc() from regular non BPF context
cache empty
freelist empty
lock(zone->lock);
tracepoint or kprobe
BPF()
update_elem()
lock(bucket)
kmalloc()
cache empty
freelist empty
lock(zone->lock); <- DEADLOCK
There are other ways which do not involve locking to create wreckage:
kmalloc() from regular non BPF context
local_irq_save();
...
obj = slab_first();
kprobe()
BPF()
update_elem()
lock(bucket)
kmalloc()
local_irq_save();
...
obj = slab_first(); <- Same object as above ...
So preallocation _must_ be enforced for all variants of intrusive
instrumentation.
Unfortunately immediate enforcement would break backwards compatibility, so
for now such programs still are allowed to run, but a one time warning is
emitted in dmesg and the verifier emits a warning in the verifier log as
well so developers are made aware about this and can fix their programs
before the enforcement becomes mandatory.
Eran Ben Elisha [Fri, 21 Feb 2020 21:46:12 +0000 (21:46 +0000)]
net/mlx5: Add fsm_reactivate callback support
Add support for fsm reactivate via MIRC (Management Image Re-activation
Control) set and query commands.
For re-activation flow, driver shall first run MIRC set, and then wait
until FW is done (via querying MIRC status).
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eran Ben Elisha [Fri, 21 Feb 2020 21:46:09 +0000 (21:46 +0000)]
net/mlxfw: Add reactivate flow support to FSM burn flow
Expose fsm_reactivate callback to the mlxfw_dev_ops struct. FSM reactivate
is needed before flashing the new image in order to flush the old flashed
but not running firmware image.
In case mlxfw_dev do not support the reactivation, this step will be
skipped. But if later image flash will fail, a hint will be provided by
the extack to advise the user that the failure might be related to it.
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Saeed Mahameed [Fri, 21 Feb 2020 21:46:03 +0000 (21:46 +0000)]
net/mlxfw: More error messages coverage
Make sure mlxfw_firmware_flash reports a detailed user readable error
message in every possible error path, basically every time
mlxfw_dev->ops->*() is called and an error is returned, or when image
initialization is failed.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Saeed Mahameed [Fri, 21 Feb 2020 21:45:58 +0000 (21:45 +0000)]
net/mlxfw: Generic mlx FW flash status notify
FW flash status notify is currently implemented via a callback to the
caller mlx module, and all it is doing is to call
devlink_flash_update_status_notify with the specific module devlink
instance.
Instead of repeating the whole process for all mlx modules and
re-implement the status_notify callback again and again. Just provide the
devlink instance as part of mlxfw_dev when calling mlxfw_firmware_flash
and let mlxfw do the devlink status updates directly.
This will be very useful for adding status notify support to mlx5, as
already done in this patch, with a simple one line of just providing the
devlink instance to mlxfw_firmware_flash.
mlxfw now depends on NET_DEVLINK as all other mlx modules.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
The following pull-request contains BPF updates for your *net-next* tree.
We've added 25 non-merge commits during the last 4 day(s) which contain
a total of 33 files changed, 2433 insertions(+), 161 deletions(-).
The main changes are:
1) Allow for adding TCP listen sockets into sock_map/hash so they can be used
with reuseport BPF programs, from Jakub Sitnicki.
2) Add a new bpf_program__set_attach_target() helper for adding libbpf support
to specify the tracepoint/function dynamically, from Eelco Chaudron.
3) Add bpf_read_branch_records() BPF helper which helps use cases like profile
guided optimizations, from Daniel Xu.
4) Enable bpf_perf_event_read_value() in all tracing programs, from Song Liu.
5) Relax BTF mandatory check if only used for libbpf itself e.g. to process
BTF defined maps, from Andrii Nakryiko.
6) Move BPF selftests -mcpu compilation attribute from 'probe' to 'v3' as it has
been observed that former fails in envs with low memlock, from Yonghong Song.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Borkmann [Fri, 21 Feb 2020 21:29:46 +0000 (22:29 +0100)]
Merge branch 'bpf-sockmap-listen'
Jakub Sitnicki says:
====================
This patch set turns SOCK{MAP,HASH} into generic collections for TCP
sockets, both listening and established. Adding support for listening
sockets enables us to use these BPF map types with reuseport BPF programs.
Why? SOCKMAP and SOCKHASH, in comparison to REUSEPORT_SOCKARRAY, allow
the socket to be in more than one map at the same time.
Having a BPF map type that can hold listening sockets, and gracefully
co-exist with reuseport BPF is important if, in the future, we want
BPF programs that run at socket lookup time [0]. Cover letter for v1 of
this series tells the full story of how we got here [1].
Although SOCK{MAP,HASH} are not a drop-in replacement for SOCKARRAY just
yet, because UDP support is lacking, it's a step in this direction. We're
working with Lorenz on extending SOCK{MAP,HASH} to hold UDP sockets, and
expect to post RFC series for sockmap + UDP in the near future.
I've dropped Acks from all patches that have been touched since v6.
The audit for missing READ_ONCE annotations for access to sk_prot is
ongoing. Thus far I've found one location specific to TCP listening sockets
that needed annotating. This got fixed it in this iteration. I wonder if
sparse checker could be put to work to identify places where we have
sk_prot access while not holding sk_lock...
The patch series depends on another one, posted earlier [2], that has
been split out of it.
v6 -> v7:
- Extended the series to cover SOCKHASH. (patches 4-8, 10-11) (John)
- Rebased onto recent bpf-next. Resolved conflicts in recent fixes to
sk_state checks on sockmap/sockhash update path. (patch 4)
- Added missing READ_ONCE annotation in sock_copy. (patch 1)
- Split out patches that simplify sk_psock_restore_proto [2].
v5 -> v6:
- Added a fix-up for patch 1 which I forgot to commit in v5. Sigh.
v4 -> v5:
- Rebase onto recent bpf-next to resolve conflicts. (Daniel)
v3 -> v4:
- Make tcp_bpf_clone parameter names consistent across function declaration
and definition. (Martin)
- Use sock_map_redirect_okay helper everywhere we need to take a different
action for listening sockets. (Lorenz)
- Expand comment explaining the need for a callback from reuseport to
sockarray code in reuseport_detach_sock. (Martin)
- Mention the possibility of using a u64 counter for reuseport IDs in the
future in the description for patch 10. (Martin)
v2 -> v3:
- Generate reuseport ID when group is created. Please see patch 10
description for details. (Martin)
- Fix the build when CONFIG_NET_SOCK_MSG is not selected by either
CONFIG_BPF_STREAM_PARSER or CONFIG_TLS. (kbuild bot & John)
- Allow updating sockmap from BPF on BPF_SOCK_OPS_TCP_LISTEN_CB callback. An
oversight in previous iterations. Users may want to populate the sockmap with
listening sockets from BPF as well.
- Removed RCU read lock assertion in sock_map_lookup_sys. (Martin)
- Get rid of a warning when child socket was cloned with parent's psock
state. (John)
- Check for tcp_bpf_unhash rather than tcp_bpf_recvmsg when deciding if
sk_proto needs restoring on clone. Check for recvmsg in the context of
listening socket cloning was confusing. (Martin)
- Consolidate sock_map_sk_is_suitable with sock_map_update_okay. This led
to adding dedicated predicates for sockhash. Update self-tests
accordingly. (John)
- Annotate unlikely branch in bpf_{sk,msg}_redirect_map when socket isn't
in a map, or isn't a valid redirect target. (John)
- Document paired READ/WRITE_ONCE annotations and cover shared access in
more detail in patch 2 description. (John)
- Correct a couple of log messages in sockmap_listen self-tests so the
message reflects the actual failure.
- Rework reuseport tests from sockmap_listen suite so that ENOENT error
from bpf_sk_select_reuseport handler does not happen on happy path.
v1 -> v2:
- af_ops->syn_recv_sock callback is no longer overridden and burdened with
restoring sk_prot and clearing sk_user_data in the child socket. As child
socket is already hashed when syn_recv_sock returns, it is too late to
put it in the right state. Instead patches 3 & 4 address restoring
sk_prot and clearing sk_user_data before we hash the child socket.
(Pointed out by Martin Lau)
- Annotate shared access to sk->sk_prot with READ_ONCE/WRITE_ONCE macros as
we write to it from sk_msg while socket might be getting cloned on
another CPU. (Suggested by John Fastabend)
- Convert tests for SOCKMAP holding listening sockets to return-on-error
style, and hook them up to test_progs. Also use BPF skeleton for setup.
Add new tests to cover the race scenario discovered during v1 review.
RFC -> v1:
- Switch from overriding proto->accept to af_ops->syn_recv_sock, which
happens earlier. Clearing the psock state after accept() does not work
for child sockets that become orphaned (never got accepted). v4-mapped
sockets need special care.
- Return the socket cookie on SOCKMAP lookup from syscall to be on par with
REUSEPORT_SOCKARRAY. Requires SOCKMAP to take u64 on lookup/update from
syscall.
- Make bpf_sk_redirect_map (ingress) and bpf_msg_redirect_map (egress)
SOCKMAP helpers fail when target socket is a listening one.
- Make bpf_sk_select_reuseport helper fail when target is a TCP established
socket.
- Teach libbpf to recognize SK_REUSEPORT program type from section name.
- Add a dedicated set of tests for SOCKMAP holding listening sockets,
covering map operations, overridden socket callbacks, and BPF helpers.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:23 +0000 (17:10 +0000)]
selftests/bpf: Tests for sockmap/sockhash holding listening sockets
Now that SOCKMAP and SOCKHASH map types can store listening sockets,
user-space and BPF API is open to a new set of potential pitfalls.
Exercise the map operations, with extra attention to code paths susceptible
to races between map ops and socket cloning, and BPF helpers that work with
SOCKMAP/SOCKHASH to gain confidence that all works as expected.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:22 +0000 (17:10 +0000)]
selftests/bpf: Extend SK_REUSEPORT tests to cover SOCKMAP/SOCKHASH
Parametrize the SK_REUSEPORT tests so that the map type for storing sockets
is not hard-coded in the test setup routine.
This, together with careful state cleaning after the tests, lets us run the
test cases for REUSEPORT_ARRAY, SOCKMAP, and SOCKHASH to have test coverage
for all supported map types. The last two support only TCP sockets at the
moment.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:21 +0000 (17:10 +0000)]
net: Generate reuseport group ID on group creation
Commit 736b46027eb4 ("net: Add ID (if needed) to sock_reuseport and expose
reuseport_lock") has introduced lazy generation of reuseport group IDs that
survive group resize.
By comparing the identifier we check if BPF reuseport program is not trying
to select a socket from a BPF map that belongs to a different reuseport
group than the one the packet is for.
Because SOCKARRAY used to be the only BPF map type that can be used with
reuseport BPF, it was possible to delay the generation of reuseport group
ID until a socket from the group was inserted into BPF map for the first
time.
Now that SOCK{MAP,HASH} can be used with reuseport BPF we have two options,
either generate the reuseport ID on map update, like SOCKARRAY does, or
allocate an ID from the start when reuseport group gets created.
This patch takes the latter approach to keep sockmap free of calls into
reuseport code. This streamlines the reuseport_id access as its lifetime
now matches the longevity of reuseport object.
The cost of this simplification, however, is that we allocate reuseport IDs
for all SO_REUSEPORT users. Even those that don't use SOCKARRAY in their
setups. With the way identifiers are currently generated, we can have at
most S32_MAX reuseport groups, which hopefully is sufficient. If we ever
get close to the limit, we can switch an u64 counter like sk_cookie.
Another change is that we now always call into SOCKARRAY logic to unlink
the socket from the map when unhashing or closing the socket. Previously we
did it only when at least one socket from the group was in a BPF map.
It is worth noting that this doesn't conflict with sockmap tear-down in
case a socket is in a SOCK{MAP,HASH} and belongs to a reuseport
group. sockmap tear-down happens first:
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:20 +0000 (17:10 +0000)]
bpf: Allow selecting reuseport socket from a SOCKMAP/SOCKHASH
SOCKMAP & SOCKHASH now support storing references to listening
sockets. Nothing keeps us from using these map types a collection of
sockets to select from in BPF reuseport programs. Whitelist the map types
with the bpf_sk_select_reuseport helper.
The restriction that the socket has to be a member of a reuseport group
still applies. Sockets in SOCKMAP/SOCKHASH that don't have sk_reuseport_cb
set are not a valid target and we signal it with -EINVAL.
The main benefit from this change is that, in contrast to
REUSEPORT_SOCKARRAY, SOCK{MAP,HASH} don't impose a restriction that a
listening socket can be just one BPF map at the same time.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:19 +0000 (17:10 +0000)]
bpf, sockmap: Let all kernel-land lookup values in SOCKMAP/SOCKHASH
Don't require the kernel code, like BPF helpers, that needs access to
SOCK{MAP,HASH} map contents to live in net/core/sock_map.c. Expose the
lookup operation to all kernel-land.
Lookup from BPF context is not whitelisted yet. While syscalls have a
dedicated lookup handler.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:18 +0000 (17:10 +0000)]
bpf, sockmap: Return socket cookie on lookup from syscall
Tooling that populates the SOCK{MAP,HASH} with sockets from user-space
needs a way to inspect its contents. Returning the struct sock * that the
map holds to user-space is neither safe nor useful. An approach established
by REUSEPORT_SOCKARRAY is to return a socket cookie (a unique identifier)
instead.
Since socket cookies are u64 values, SOCK{MAP,HASH} need to support such a
value size for lookup to be possible. This requires special handling on
update, though. Attempts to do a lookup on a map holding u32 values will be
met with ENOSPC error.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:17 +0000 (17:10 +0000)]
bpf, sockmap: Don't set up upcalls and progs for listening sockets
Now that sockmap/sockhash can hold listening sockets, when setting up the
psock we will (i) grab references to verdict/parser progs, and (2) override
socket upcalls sk_data_ready and sk_write_space.
However, since we cannot redirect to listening sockets so we don't need to
link the socket to the BPF progs. And more importantly we don't want the
listening socket to have overridden upcalls because they would get
inherited by child sockets cloned from it.
Introduce a separate initialization path for listening sockets that does
not change the upcalls and ignores the BPF progs.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:16 +0000 (17:10 +0000)]
bpf, sockmap: Allow inserting listening TCP sockets into sockmap
In order for sockmap/sockhash types to become generic collections for
storing TCP sockets we need to loosen the checks during map update, while
tightening the checks in redirect helpers.
Currently sock{map,hash} require the TCP socket to be in established state,
which prevents inserting listening sockets.
Change the update pre-checks so the socket can also be in listening state.
Since it doesn't make sense to redirect with sock{map,hash} to listening
sockets, add appropriate socket state checks to BPF redirect helpers too.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:15 +0000 (17:10 +0000)]
tcp_bpf: Don't let child socket inherit parent protocol ops on copy
Prepare for cloning listening sockets that have their protocol callbacks
overridden by sk_msg. Child sockets must not inherit parent callbacks that
access state stored in sk_user_data owned by the parent.
Restore the child socket protocol callbacks before it gets hashed and any
of the callbacks can get invoked.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:14 +0000 (17:10 +0000)]
net, sk_msg: Clear sk_user_data pointer on clone if tagged
sk_user_data can hold a pointer to an object that is not intended to be
shared between the parent socket and the child that gets a pointer copy on
clone. This is the case when sk_user_data points at reference-counted
object, like struct sk_psock.
One way to resolve it is to tag the pointer with a no-copy flag by
repurposing its lowest bit. Based on the bit-flag value we clear the child
sk_user_data pointer after cloning the parent socket.
The no-copy flag is stored in the pointer itself as opposed to externally,
say in socket flags, to guarantee that the pointer and the flag are copied
from parent to child socket in an atomic fashion. Parent socket state is
subject to change while copying, we don't hold any locks at that time.
This approach relies on an assumption that sk_user_data holds a pointer to
an object aligned at least 2 bytes. A manual audit of existing users of
rcu_dereference_sk_user_data helper confirms our assumption.
Also, an RCU-protected sk_user_data is not likely to hold a pointer to a
char value or a pathological case of "struct { char c; }". To be safe, warn
when the flag-bit is set when setting sk_user_data to catch any future
misuses.
It is worth considering why clearing sk_user_data unconditionally is not an
option. There exist users, DRBD, NVMe, and Xen drivers being among them,
that rely on the pointer being copied when cloning the listening socket.
Potentially we could distinguish these users by checking if the listening
socket has been created in kernel-space via sock_create_kern, and hence has
sk_kern_sock flag set. However, this is not the case for NVMe and Xen
drivers, which create sockets without marking them as belonging to the
kernel.
Jakub Sitnicki [Tue, 18 Feb 2020 17:10:13 +0000 (17:10 +0000)]
net, sk_msg: Annotate lockless access to sk_prot on clone
sk_msg and ULP frameworks override protocol callbacks pointer in
sk->sk_prot, while tcp accesses it locklessly when cloning the listening
socket, that is with neither sk_lock nor sk_callback_lock held.
Once we enable use of listening sockets with sockmap (and hence sk_msg),
there will be shared access to sk->sk_prot if socket is getting cloned
while being inserted/deleted to/from the sockmap from another CPU:
Linus Torvalds [Fri, 21 Feb 2020 21:02:49 +0000 (13:02 -0800)]
Merge tag 'linux-watchdog-5.6-rc3' of git://www.linux-watchdog.org/linux-watchdog
Pull watchdog fixes from Wim Van Sebroeck:
- mtk_wdt needs RESET_CONTROLLER to build
- da9062 driver fixes:
- fix power management ops
- do not ping the hw during stop()
- add dependency on I2C
* tag 'linux-watchdog-5.6-rc3' of git://www.linux-watchdog.org/linux-watchdog:
watchdog: da9062: Add dependency on I2C
watchdog: da9062: fix power management ops
watchdog: da9062: do not ping the hw during stop()
watchdog: fix mtk_wdt.c RESET_CONTROLLER build error
Linus Torvalds [Fri, 21 Feb 2020 20:57:05 +0000 (12:57 -0800)]
Merge tag 'char-misc-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small char/misc driver fixes for 5.6-rc3.
Also included in here are some updates for some documentation files
that I seem to be maintaining these days.
The driver fixes are:
- small fixes for the habanalabs driver
- fsi driver bugfix
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
Documentation/process: Swap out the ambassador for Canonical
habanalabs: patched cb equals user cb in device memset
habanalabs: do not halt CoreSight during hard reset
habanalabs: halt the engines before hard-reset
MAINTAINERS: remove unnecessary ':' characters
fsi: aspeed: add unspecified HAS_IOMEM dependency
COPYING: state that all contributions really are covered by this file
Documentation/process: Change Microsoft contact for embargoed hardware issues
embargoed-hardware-issues: drop Amazon contact as the email address now bounces
Documentation/process: Add Arm contact for embargoed HW issues
Linus Torvalds [Fri, 21 Feb 2020 20:53:53 +0000 (12:53 -0800)]
Merge tag 'staging-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are some small staging driver fixes for 5.6-rc3, along with the
removal of an unused/unneeded driver as well.
The android vsoc driver is not needed anymore by anyone, so it was
removed.
The other driver fixes are:
- ashmem bugfixes
- greybus audio driver bugfix
- wireless driver bugfixes and tiny cleanups to error paths
All of these have been in linux-next for a while now with no reported
issues"
* tag 'staging-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: rtl8723bs: Remove unneeded goto statements
staging: rtl8188eu: Remove some unneeded goto statements
staging: rtl8723bs: Fix potential overuse of kernel memory
staging: rtl8188eu: Fix potential overuse of kernel memory
staging: rtl8723bs: Fix potential security hole
staging: rtl8188eu: Fix potential security hole
staging: greybus: use after free in gb_audio_manager_remove_all()
staging: android: Delete the 'vsoc' driver
staging: rtl8723bs: fix copy of overlapping memory
staging: android: ashmem: Disallow ashmem memory from being remapped
staging: vt6656: fix sign of rx_dbm to bb_pre_ed_rssi.
Linus Torvalds [Fri, 21 Feb 2020 20:48:29 +0000 (12:48 -0800)]
Merge tag 'tty-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg KH:
"Here are a number of small tty and serial driver fixes for 5.6-rc3
that resolve a bunch of reported issues.
They are:
- vt selection and ioctl fixes
- serdev bugfix
- atmel serial driver fixes
- qcom serial driver fixes
- other minor serial driver fixes
All of these have been in linux-next for a while with no reported
issues"
* tag 'tty-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
vt: selection, close sel_buffer race
vt: selection, handle pending signals in paste_selection
serial: cpm_uart: call cpm_muram_init before registering console
tty: serial: qcom_geni_serial: Fix RX cancel command failure
serial: 8250: Check UPF_IRQ_SHARED in advance
tty: serial: imx: setup the correct sg entry for tx dma
vt: vt_ioctl: fix race in VT_RESIZEX
vt: fix scrollback flushing on background consoles
tty: serial: tegra: Handle RX transfer in PIO mode if DMA wasn't started
tty/serial: atmel: manage shutdown in case of RS485 or ISO7816 mode
serdev: ttyport: restore client ops on deregistration
serial: ar933x_uart: set UART_CS_{RX,TX}_READY_ORIDE
Linus Torvalds [Fri, 21 Feb 2020 20:44:53 +0000 (12:44 -0800)]
Merge tag 'usb-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB/Thunderbolt fixes from Greg KH:
"Here are a number of small USB driver fixes for 5.6-rc3.
Included in here are:
- MAINTAINER file updates
- USB gadget driver fixes
- usb core quirk additions and fixes for regressions
- xhci driver fixes
- usb serial driver id additions and fixes
- thunderbolt bugfix
Thunderbolt patches come in through here now that USB4 is really
thunderbolt.
All of these have been in linux-next for a while with no reported
issues"
* tag 'usb-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (34 commits)
USB: misc: iowarrior: add support for the 100 device
thunderbolt: Prevent crash if non-active NVMem file is read
usb: gadget: udc-xilinx: Fix xudc_stop() kernel-doc format
USB: misc: iowarrior: add support for the 28 and 28L devices
USB: misc: iowarrior: add support for 2 OEMed devices
USB: Fix novation SourceControl XL after suspend
xhci: Fix memory leak when caching protocol extended capability PSI tables - take 2
Revert "xhci: Fix memory leak when caching protocol extended capability PSI tables"
MAINTAINERS: Sort entries in database for THUNDERBOLT
usb: dwc3: debug: fix string position formatting mixup with ret and len
usb: gadget: serial: fix Tx stall after buffer overflow
usb: gadget: ffs: ffs_aio_cancel(): Save/restore IRQ flags
usb: dwc2: Fix SET/CLEAR_FEATURE and GET_STATUS flows
usb: dwc2: Fix in ISOC request length checking
usb: gadget: composite: Support more than 500mA MaxPower
usb: gadget: composite: Fix bMaxPower for SuperSpeedPlus
usb: gadget: u_audio: Fix high-speed max packet size
usb: dwc3: gadget: Check for IOC/LST bit in TRB->ctrl fields
USB: core: clean up endpoint-descriptor parsing
USB: quirks: blacklist duplicate ep on Sound Devices USBPre2
...
Linus Torvalds [Fri, 21 Feb 2020 20:18:02 +0000 (12:18 -0800)]
Merge tag 'drm-fixes-2020-02-21' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Varied fixes for rc3.
i915 is the largest, they are seeing some ACPI problems with their CI
which hopefully get solved soon [1].
msm has a bunch of fixes for new hw added in the merge, a bunch of
amdgpu fixes, and nouveau adds support for some new firmwares for
turing tu11x GPUs that were just released into linux-firmware by
nvidia, they operate the same as the ones we already have for tu10x so
should be fine to hook up.
Otherwise it's just misc fixes for panfrost and sun4i.
core:
- Allow only one rotation argument, and allow zero rotation in video
cmdline.
i915:
- Workaround missing Display Stream Compression (DSC) state readout
by forcing modeset when its enabled at probe
- Fix EHL port clock voltage level requirements
- Fix queuing retire workers on the virtual engine
- Fix use of partially initialized waiters
- Stop using drm_pci_alloc/drm_pci/free
- Fix rewind of RING_TAIL by forcing a context reload
- Fix locking on resetting ring->head
- Propagate our bug filing URL change to stable kernels
panfrost:
- Small compiler warning fix for panfrost.
- Fix when using performance counters in panfrost when using per fd
address space.
sun4xi:
- Fix dt binding
nouveau:
- tu11x modesetting fix
- ACR/GR firmware support for tu11x (fw is public now)
msm:
- fix UBWC on GPU and display side for sc7180
- fix DSI suspend/resume issue encountered on sc7180
- fix some breakage on so called "linux-android" devices
(fallout from sc7180/a618 support, not seen earlier due to
bootloader/firmware differences)
- couple other misc fixes
[1] The Intel suspend testing should now be fixed by commit 63fb9623427f
("ACPI: PM: s2idle: Check fixed wakeup events in acpi_s2idle_wake()")
* tag 'drm-fixes-2020-02-21' of git://anongit.freedesktop.org/drm/drm: (39 commits)
drm/amdgpu/display: clean up hdcp workqueue handling
drm/amdgpu: add is_raven_kicker judgement for raven1
drm/i915/gt: Avoid resetting ring->head outside of its timeline mutex
drm/i915/execlists: Always force a context reload when rewinding RING_TAIL
drm/i915: Wean off drm_pci_alloc/drm_pci_free
drm/i915/gt: Protect defer_request() from new waiters
drm/i915/gt: Prevent queuing retire workers on the virtual engine
drm/i915/dsc: force full modeset whenever DSC is enabled at probe
drm/i915/ehl: Update port clock voltage level requirements
drm/i915: Update drm/i915 bug filing URL
MAINTAINERS: Update drm/i915 bug filing URL
drm/i915: Initialise basic fence before acquiring seqno
drm/i915/gem: Require per-engine reset support for non-persistent contexts
drm/nouveau/kms/gv100-: Re-set LUT after clearing for modesets
drm/nouveau/gr/tu11x: initial support
drm/nouveau/acr/tu11x: initial support
drm/amdgpu/gfx10: disable gfxoff when reading rlc clock
drm/amdgpu/gfx9: disable gfxoff when reading rlc clock
drm/amdgpu/soc15: fix xclk for raven
drm/amd/powerplay: always refetch the enabled features status on dpm enablement
...
1) Limit xt_hashlimit hash table size to avoid OOM or hung tasks, from
Cong Wang.
2) Fix deadlock in xsk by publishing global consumer pointers when NAPI
is finished, from Magnus Karlsson.
3) Set table field properly to RT_TABLE_COMPAT when necessary, from
Jethro Beekman.
4) NLA_STRING attributes are not necessary NULL terminated, deal wiht
that in IFLA_ALT_IFNAME. From Eric Dumazet.
5) Fix checksum handling in atlantic driver, from Dmitry Bezrukov.
6) Handle mtu==0 devices properly in wireguard, from Jason A.
Donenfeld.
7) Fix several lockdep warnings in bonding, from Taehee Yoo.
8) Fix cls_flower port blocking, from Jason Baron.
9) Sanitize internal map names in libbpf, from Toke Høiland-Jørgensen.
10) Fix RDMA race in qede driver, from Michal Kalderon.
11) Fix several false lockdep warnings by adding conditions to
list_for_each_entry_rcu(), from Madhuparna Bhowmik.
12) Fix sleep in atomic in mlx5 driver, from Huy Nguyen.
13) Fix potential deadlock in bpf_map_do_batch(), from Yonghong Song.
14) Hey, variables declared in switch statement before any case
statements are not initialized. I learn something every day. Get
rids of this stuff in several parts of the networking, from Kees
Cook.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (99 commits)
bnxt_en: Issue PCIe FLR in kdump kernel to cleanup pending DMAs.
bnxt_en: Improve device shutdown method.
net: netlink: cap max groups which will be considered in netlink_bind()
net: thunderx: workaround BGX TX Underflow issue
ionic: fix fw_status read
net: disable BRIDGE_NETFILTER by default
net: macb: Properly handle phylink on at91rm9200
s390/qeth: fix off-by-one in RX copybreak check
s390/qeth: don't warn for napi with 0 budget
s390/qeth: vnicc Fix EOPNOTSUPP precedence
openvswitch: Distribute switch variables for initialization
net: ip6_gre: Distribute switch variables for initialization
net: core: Distribute switch variables for initialization
udp: rehash on disconnect
net/tls: Fix to avoid gettig invalid tls record
bpf: Fix a potential deadlock with bpf_map_do_batch
bpf: Do not grab the bucket spinlock by default on htab batch ops
ice: Wait for VF to be reset/ready before configuration
ice: Don't tell the OS that link is going down
ice: Don't reject odd values of usecs set by user
...
David S. Miller [Fri, 21 Feb 2020 19:59:13 +0000 (11:59 -0800)]
Merge branch 'Migrate-QRTR-Nameservice-to-Kernel'
Manivannan Sadhasivam says:
====================
Migrate QRTR Nameservice to Kernel
This patchset migrates the Qualcomm IPC Router (QRTR) Nameservice from userspace
to kernel under net/qrtr.
The userspace implementation of it can be found here:
https://github.com/andersson/qrtr/blob/master/src/ns.c
This change is required for enabling the WiFi functionality of some Qualcomm
WLAN devices using ATH11K without any dependency on a userspace daemon. Since
the QRTR NS is not usually packed in most of the distros, users need to clone,
build and install it to get the WiFi working. It will become a hassle when the
user doesn't have any other source of network connectivity.
The original userspace code is published under BSD3 license. For migrating it
to Linux kernel, I have adapted Dual BSD/GPL license.
This patchset has been verified on Dragonboard410c and Intel NUC with QCA6390
WLAN device.
Changes in v2:
* Sorted the local variables in reverse XMAS tree order
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
In order to start the QRTR nameservice, the local node ID needs to be
valid. Hence, fix it to 1. Previously, the node ID was configured through
a userspace tool before starting the nameservice daemon. Since we have now
integrated the nameservice handling to kernel, this change is necessary
for making it functional.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
net: qrtr: Migrate nameservice to kernel from userspace
The QRTR nameservice has been maintained in userspace for some time. This
commit migrates it to Linux kernel. This change is required in order to
eliminate the need of starting a userspace daemon for making the WiFi
functional for ath11k based devices. Since the QRTR NS is not usually
packed in most of the distros, users need to clone, build and install it
to get the WiFi working. It will become a hassle when the user doesn't
have any other source of network connectivity.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Murphy [Tue, 18 Feb 2020 14:11:30 +0000 (08:11 -0600)]
net: phy: dp83867: Add speed optimization feature
Set the speed optimization bit on the DP83867 PHY.
This feature can also be strapped on the 64 pin PHY devices
but the 48 pin devices do not have the strap pin available to enable
this feature in the hardware. PHY team suggests to have this bit set.
With this bit set the PHY will auto negotiate and report the link
parameters in the PHYSTS register. This register provides a single
location within the register set for quick access to commonly accessed
information.
In this case when auto negotiation is on the PHY core reads the bits
that have been configured or if auto negotiation is off the PHY core
reads the BMCR register and sets the phydev parameters accordingly.
This Giga bit PHY can throttle the speed to 100Mbps or 10Mbps to accomodate a
4-wire cable. If this should occur the PHYSTS register contains the
current negotiated speed and duplex mode.
In overriding the genphy_read_status the dp83867_read_status will do a
genphy_read_status to setup the LP and pause bits. And then the PHYSTS
register is read and the phydev speed and duplex mode settings are
updated.
Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Fri, 21 Feb 2020 19:40:10 +0000 (11:40 -0800)]
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
- A few y2038 fixes which missed the merge window while dependencies
in NFS were being sorted out.
- A bunch of fixes. Some minor, some not.
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
MAINTAINERS: use tabs for SAFESETID
lib/stackdepot.c: fix global out-of-bounds in stack_slabs
mm/sparsemem: pfn_to_page is not valid yet on SPARSEMEM
mm/vmscan.c: don't round up scan size for online memory cgroup
lib/string.c: update match_string() doc-strings with correct behavior
mm/memcontrol.c: lost css_put in memcg_expand_shrinker_maps()
mm/swapfile.c: fix a comment in sys_swapon()
scripts/get_maintainer.pl: deprioritize old Fixes: addresses
get_maintainer: remove uses of P: for maintainer name
selftests/vm: add missed tests in run_vmtests
include/uapi/linux/swab.h: fix userspace breakage, use __BITS_PER_LONG for swap
Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()"
y2038: hide timeval/timespec/itimerval/itimerspec types
y2038: remove unused time32 interfaces
y2038: remove ktime to/from timespec/timeval conversion
lib/stackdepot.c: fix global out-of-bounds in stack_slabs
Walter Wu has reported a potential case in which init_stack_slab() is
called after stack_slabs[STACK_ALLOC_MAX_SLABS - 1] has already been
initialized. In that case init_stack_slab() will overwrite
stack_slabs[STACK_ALLOC_MAX_SLABS], which may result in a memory
corruption.
Link: http://lkml.kernel.org/r/20200218102950.260263-1-glider@google.com Fixes: cd11016e5f521 ("mm, kasan: stackdepot implementation. Enable stackdepot for SLAB") Signed-off-by: Alexander Potapenko <glider@google.com> Reported-by: Walter Wu <walter-zh.wu@mediatek.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
On x86 the impact is limited to x86_32 builds, or x86_64 configurations
that override the default setting for SPARSEMEM_VMEMMAP.
Other memory hotplug archs (arm64, ia64, and ppc) also default to
SPARSEMEM_VMEMMAP=y.
[dan.j.williams@intel.com: changelog update]
{rppt@linux.ibm.com: changelog update] Link: http://lkml.kernel.org/r/20200219030454.4844-1-bhe@redhat.com Fixes: ba72b4c8cf60 ("mm/sparsemem: support sub-section hotplug") Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Baoquan He <bhe@redhat.com> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Gavin Shan [Fri, 21 Feb 2020 04:04:24 +0000 (20:04 -0800)]
mm/vmscan.c: don't round up scan size for online memory cgroup
Commit 68600f623d69 ("mm: don't miss the last page because of round-off
error") makes the scan size round up to @denominator regardless of the
memory cgroup's state, online or offline. This affects the overall
reclaiming behavior: the corresponding LRU list is eligible for
reclaiming only when its size logically right shifted by @sc->priority
is bigger than zero in the former formula.
For example, the inactive anonymous LRU list should have at least 0x4000
pages to be eligible for reclaiming when we have 60/12 for
swappiness/priority and without taking scan/rotation ratio into account.
After the roundup is applied, the inactive anonymous LRU list becomes
eligible for reclaiming when its size is bigger than or equal to 0x1000
in the same condition.
aarch64 has 512MB huge page size when the base page size is 64KB. The
memory cgroup that has a huge page is always eligible for reclaiming in
that case.
The reclaiming is likely to stop after the huge page is reclaimed,
meaing the further iteration on @sc->priority and the silbing and child
memory cgroups will be skipped. The overall behaviour has been changed.
This fixes the issue by applying the roundup to offlined memory cgroups
only, to give more preference to reclaim memory from offlined memory
cgroup. It sounds reasonable as those memory is unlikedly to be used by
anyone.
The issue was found by starting up 8 VMs on a Ampere Mustang machine,
which has 8 CPUs and 16 GB memory. Each VM is given with 2 vCPUs and
2GB memory. It took 264 seconds for all VMs to be completely up and
784MB swap is consumed after that. With this patch applied, it took 236
seconds and 60MB swap to do same thing. So there is 10% performance
improvement for my case. Note that KSM is disable while THP is enabled
in the testing.
total used free shared buff/cache available
Mem: 16196 10065 2049 16 4081 3749
Swap: 8175 784 7391
total used free shared buff/cache available
Mem: 16196 11324 3656 24 1215 2936
Swap: 8175 60 8115
Link: http://lkml.kernel.org/r/20200211024514.8730-1-gshan@redhat.com Fixes: 68600f623d69 ("mm: don't miss the last page because of round-off error") Signed-off-by: Gavin Shan <gshan@redhat.com> Acked-by: Roman Gushchin <guro@fb.com> Cc: <stable@vger.kernel.org> [4.20+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/string.c: update match_string() doc-strings with correct behavior
There were a few attempts at changing behavior of the match_string()
helpers (i.e. 'match_string()' & 'sysfs_match_string()'), to change &
extend the behavior according to the doc-string.
But the simplest approach is to just fix the doc-strings. The current
behavior is fine as-is, and some bugs were introduced trying to fix it.
As for extending the behavior, new helpers can always be introduced if
needed.
The match_string() helpers behave more like 'strncmp()' in the sense
that they go up to n elements or until the first NULL element in the
array of strings.
This change updates the doc-strings with this info.
Link: http://lkml.kernel.org/r/20200213072722.8249-1-alexandru.ardelean@analog.com Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Kees Cook <keescook@chromium.org> Cc: "Tobin C . Harding" <tobin@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Douglas Anderson [Fri, 21 Feb 2020 04:04:12 +0000 (20:04 -0800)]
scripts/get_maintainer.pl: deprioritize old Fixes: addresses
Recently, I found that get_maintainer was causing me to send emails to
the old addresses for maintainers. Since I usually just trust the
output of get_maintainer to know the right email address, I didn't even
look carefully and fired off two patch series that went to the wrong
place. Oops.
The problem was introduced recently when trying to add signatures from
Fixes. The problem was that these email addresses were added too early
in the process of compiling our list of places to send. Things added to
the list earlier are considered more canonical and when we later added
maintainer entries we ended up deduplicating to the old address.
Here are two examples using mainline commits (to make it easier to
replicate) for the two maintainers that I messed up recently:
Joe Perches [Fri, 21 Feb 2020 04:04:09 +0000 (20:04 -0800)]
get_maintainer: remove uses of P: for maintainer name
Commit 1ca84ed6425f ("MAINTAINERS: Reclaim the P: tag for Maintainer
Entry Profile") changed the use of the "P:" tag from "Person" to
"Profile (ie: special subsystem coding styles and characteristics)"
Change how get_maintainer.pl parses the "P:" tag to match.
Link: http://lkml.kernel.org/r/ca53823fc5d25c0be32ad937d0207a0589c08643.camel@perches.com Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Dan Williams <dan.j.william@intel.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
SeongJae Park [Fri, 21 Feb 2020 04:04:06 +0000 (20:04 -0800)]
selftests/vm: add missed tests in run_vmtests
The commits introducing 'mlock-random-test'[1], 'map_fiex_noreplace'[2],
and 'thuge-gen'[3] have not added those in the 'run_vmtests' script and
thus the 'run_tests' command of kselftests doesn't run those. This
commit adds those in the script.
'gup_benchmark' and 'transhuge-stress' are also not included in the
'run_vmtests', but this commit does not add those because those are for
performance measurement rather than pass/fail tests.
[1] commit 26b4224d9961 ("selftests: expanding more mlock selftest")
[2] commit 91cbacc34512 ("tools/testing/selftests/vm/map_fixed_noreplace.c: add test for MAP_FIXED_NOREPLACE")
[3] commit fcc1f2d5dd34 ("selftests: add a test program for variable huge page sizes in mmap/shmget")
include/uapi/linux/swab.h: fix userspace breakage, use __BITS_PER_LONG for swap
QEMU has a funny new build error message when I use the upstream kernel
headers:
CC block/file-posix.o
In file included from /home/cborntra/REPOS/qemu/include/qemu/timer.h:4,
from /home/cborntra/REPOS/qemu/include/qemu/timed-average.h:29,
from /home/cborntra/REPOS/qemu/include/block/accounting.h:28,
from /home/cborntra/REPOS/qemu/include/block/block_int.h:27,
from /home/cborntra/REPOS/qemu/block/file-posix.c:30:
/usr/include/linux/swab.h: In function `__swab':
/home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:34: error: "sizeof" is not defined, evaluates to 0 [-Werror=undef]
20 | #define BITS_PER_LONG (sizeof (unsigned long) * BITS_PER_BYTE)
| ^~~~~~
/home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:41: error: missing binary operator before token "("
20 | #define BITS_PER_LONG (sizeof (unsigned long) * BITS_PER_BYTE)
| ^
cc1: all warnings being treated as errors
make: *** [/home/cborntra/REPOS/qemu/rules.mak:69: block/file-posix.o] Error 1
rm tests/qemu-iotests/socket_scm_helper.o
This was triggered by commit d5767057c9a ("uapi: rename ext2_swab() to
swab() and share globally in swab.h"). That patch is doing
#include <asm/bitsperlong.h>
but it uses BITS_PER_LONG.
The kernel file asm/bitsperlong.h provide only __BITS_PER_LONG.
Let us use the __ variant in swap.h
Link: http://lkml.kernel.org/r/20200213142147.17604-1-borntraeger@de.ibm.com Fixes: d5767057c9a ("uapi: rename ext2_swab() to swab() and share globally in swab.h") Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Yury Norov <yury.norov@gmail.com> Cc: Allison Randal <allison@lohutok.net> Cc: Joe Perches <joe@perches.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: William Breathitt Gray <vilhelm.gray@gmail.com> Cc: Torsten Hilbrich <torsten.hilbrich@secunet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit a97955844807 ("ipc,sem: remove uneeded sem_undo_list lock usage
in exit_sem()") removes a lock that is needed. This leads to a process
looping infinitely in exit_sem() and can also lead to a crash. There is
a reproducer available in [1] and with the commit reverted the issue
does not reproduce anymore.
Using the reproducer found in [1] is fairly easy to reach a point where
one of the child processes is looping infinitely in exit_sem between
for(;;) and if (semid == -1) block, while it's trying to free its last
sem_undo structure which has already been freed by freeary().
Each sem_undo struct is on two lists: one per semaphore set (list_id)
and one per process (list_proc). The list_id list tracks undos by
semaphore set, and the list_proc by process.
Undo structures are removed either by freeary() or by exit_sem(). The
freeary function is invoked when the user invokes a syscall to remove a
semaphore set. During this operation freeary() traverses the list_id
associated with the semaphore set and removes the undo structures from
both the list_id and list_proc lists.
For this case, exit_sem() is called at process exit. Each process
contains a struct sem_undo_list (referred to as "ulp") which contains
the head for the list_proc list. When the process exits, exit_sem()
traverses this list to remove each sem_undo struct. As in freeary(),
whenever a sem_undo struct is removed from list_proc, it is also removed
from the list_id list.
Removing elements from list_id is safe for both exit_sem() and freeary()
due to sem_lock(). Removing elements from list_proc is not safe;
freeary() locks &un->ulp->lock when it performs
list_del_rcu(&un->list_proc) but exit_sem() does not (locking was
removed by commit a97955844807 ("ipc,sem: remove uneeded sem_undo_list
lock usage in exit_sem()").
This can result in the following situation while executing the
reproducer [1] : Consider a child process in exit_sem() and the parent
in freeary() (because of semctl(sid[i], NSEM, IPC_RMID)).
- The list_proc for the child contains the last two undo structs A and
B (the rest have been removed either by exit_sem() or freeary()).
- The semid for A is 1 and semid for B is 2.
- exit_sem() removes A and at the same time freeary() removes B.
- Since A and B have different semid sem_lock() will acquire different
locks for each process and both can proceed.
The bug is that they remove A and B from the same list_proc at the same
time because only freeary() acquires the ulp lock. When exit_sem()
removes A it makes ulp->list_proc.next to point at B and at the same
time freeary() removes B setting B->semid=-1.
At the next iteration of for(;;) loop exit_sem() will try to remove B.
The only way to break from for(;;) is for (&un->list_proc ==
&ulp->list_proc) to be true which is not. Then exit_sem() will check if
B->semid=-1 which is and will continue looping in for(;;) until the
memory for B is reallocated and the value at B->semid is changed.
At that point, exit_sem() will crash attempting to unlink B from the
lists (this can be easily triggered by running the reproducer [1] a
second time).
To prove this scenario instrumentation was added to keep information
about each sem_undo (un) struct that is removed per process and per
semaphore set (sma).
CPU0 CPU1
[caller holds sem_lock(sma for A)] ...
freeary() exit_sem()
... ...
... sem_lock(sma for B)
spin_lock(A->ulp->lock) ...
list_del_rcu(un_A->list_proc) list_del_rcu(un_B->list_proc)
Undo structures A and B have different semid and sem_lock() operations
proceed. However they belong to the same list_proc list and they are
removed at the same time. This results into ulp->list_proc.next
pointing to the address of B which is already removed.
After reverting commit a97955844807 ("ipc,sem: remove uneeded
sem_undo_list lock usage in exit_sem()") the issue was no longer
reproducible.
There are no in-kernel users remaining, but there may still be users that
include linux/time.h instead of sys/time.h from user space, so leave the
types available to user space while hiding them from kernel space.
Only the __kernel_old_* versions of these types remain now.
ACPI: PM: s2idle: Check fixed wakeup events in acpi_s2idle_wake()
Commit fdde0ff8590b ("ACPI: PM: s2idle: Prevent spurious SCIs from
waking up the system") overlooked the fact that fixed events can wake
up the system too and broke RTC wakeup from suspend-to-idle as a
result.
Fix this issue by checking the fixed events in acpi_s2idle_wake() in
addition to checking wakeup GPEs and break out of the suspend-to-idle
loop if the status bits of any enabled fixed events are set then.
Fixes: fdde0ff8590b ("ACPI: PM: s2idle: Prevent spurious SCIs from waking up the system") Reported-and-tested-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: 5.4+ <stable@vger.kernel.org> # 5.4+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Vladimir Oltean [Fri, 21 Feb 2020 14:46:24 +0000 (16:46 +0200)]
enetc: remove "depends on (ARCH_LAYERSCAPE || COMPILE_TEST)"
ARCH_LAYERSCAPE isn't needed for this driver, it builds and
sends/receives traffic without this config option just fine.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Acked-by: Claudiu Manoil <claudiu.manoil@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ilias Apalodimas [Fri, 21 Feb 2020 09:15:19 +0000 (11:15 +0200)]
net: page_pool: Add documentation on page_pool API
Add documentation explaining the basic functionality and design
principles of the API
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Dave Airlie [Fri, 21 Feb 2020 02:46:54 +0000 (12:46 +1000)]
Merge tag 'drm-intel-fixes-2020-02-20' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
drm/i915 fixes for v5.6-rc3:
- Workaround missing Display Stream Compression (DSC) state readout by
forcing modeset when its enabled at probe
- Fix EHL port clock voltage level requirements
- Fix queuing retire workers on the virtual engine
- Fix use of partially initialized waiters
- Stop using drm_pci_alloc/drm_pci/free
- Fix rewind of RING_TAIL by forcing a context reload
- Fix locking on resetting ring->head
- Propagate our bug filing URL change to stable kernels
Dave Airlie [Fri, 21 Feb 2020 02:30:23 +0000 (12:30 +1000)]
Merge tag 'drm-misc-fixes-2020-02-20' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
drm-misc-fixes for v5.6-rc3:
- Fix dt binding for sunxi.
- Allow only 1 rotation argument, and allow 0 rotation in video cmdline.
- Small compiler warning fix for panfrost.
- Fix when using performance counters in panfrost when using per fd address space.
Yonghong Song [Fri, 21 Feb 2020 00:43:54 +0000 (16:43 -0800)]
docs/bpf: Update bpf development Q/A file
bpf now has its own mailing list bpf@vger.kernel.org.
Update the bpf_devel_QA.rst file to reflect this.
Also llvm has switch to github with llvm and clang
in the same repo https://github.com/llvm/llvm-project.git.
Update the QA file with newer build instructions.
====================
Currently when you want to attach a trace program to a bpf program
the section name needs to match the tracepoint/function semantics.
However the addition of the bpf_program__set_attach_target() API
allows you to specify the tracepoint/function dynamically.
v1 -> v2: Remove requirement for attach type hint in API
v2 -> v3: Moved common warning to __find_vmlinux_btf_id, requested by Andrii
Updated the xdp_bpf2bpf test to use this new API
v3 -> v4: Split up patch, update libbpf.map version
v4 -> v5: Fix return code, and prog assignment in test case
====================
Vasundhara Volam [Thu, 20 Feb 2020 22:26:35 +0000 (17:26 -0500)]
bnxt_en: Issue PCIe FLR in kdump kernel to cleanup pending DMAs.
If crashed kernel does not shutdown the NIC properly, PCIe FLR
is required in the kdump kernel in order to initialize all the
functions properly.
Fixes: d629522e1d66 ("bnxt_en: Reduce memory usage when running in kdump kernel.") Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Vasundhara Volam [Thu, 20 Feb 2020 22:26:34 +0000 (17:26 -0500)]
bnxt_en: Improve device shutdown method.
Especially when bnxt_shutdown() is called during kexec, we need to
disable MSIX and disable Bus Master to completely quiesce the device.
Make these 2 calls unconditionally in the shutdown method.
Fixes: c20dc142dd7b ("bnxt_en: Disable bus master during PCI shutdown and driver unload.") Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
net: netlink: cap max groups which will be considered in netlink_bind()
Since nl_groups is a u32 we can't bind more groups via ->bind
(netlink_bind) call, but netlink has supported more groups via
setsockopt() for a long time and thus nlk->ngroups could be over 32.
Recently I added support for per-vlan notifications and increased the
groups to 33 for NETLINK_ROUTE which exposed an old bug in the
netlink_bind() code causing out-of-bounds access on archs where unsigned
long is 32 bits via test_bit() on a local variable. Fix this by capping the
maximum groups in netlink_bind() to BITS_PER_TYPE(u32), effectively
capping them at 32 which is the minimum of allocated groups and the
maximum groups which can be bound via netlink_bind().
CC: Christophe Leroy <christophe.leroy@c-s.fr> CC: Richard Guy Briggs <rgb@redhat.com> Fixes: 4f520900522f ("netlink: have netlink per-protocol bind function return an error code.") Reported-by: Erhard F. <erhard_f@mailbox.org> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 21 Feb 2020 00:00:14 +0000 (16:00 -0800)]
Merge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
Jeff Kirsher says:
====================
1GbE Intel Wired LAN Driver Updates 2020-02-19
This series contains updates to e1000e and igc drivers.
Ben Dooks adds a missing cpu_to_le64() in the e1000e transmit ring flush
function.
Jia-Ju Bai replaces a couple of udelay() with usleep_range() where we
could sleep while holding a spinlock in e1000e.
Chen Zhou make 2 functions static in igc,
Sasha finishes the legacy power management support in igc by adding
resume and schedule suspend requests. Also added register dump
functionality in the igc driver. Added device id support for the next
generation of i219 devices in e1000e. Fixed a typo in the igc driver
that referenced a device that is not support in the driver. Added the
missing PTP support when suspending now that igc has legacy power
management support. Added PCIe error detection, slot reset and resume
capability in igc. Added WoL support for igc as well. Lastly, added a
code comment to distinguish between interrupt and flag definitions.
Vitaly adds device id support for Tiger Lake platforms, which has
another next generation of i219 device in e1000e.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Tim Harvey [Wed, 19 Feb 2020 23:19:36 +0000 (15:19 -0800)]
net: thunderx: workaround BGX TX Underflow issue
While it is not yet understood why a TX underflow can easily occur
for SGMII interfaces resulting in a TX wedge. It has been found that
disabling/re-enabling the LMAC resolves the issue.
Signed-off-by: Tim Harvey <tharvey@gateworks.com> Reviewed-by: Robert Jones <rjones@gateworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Shannon Nelson [Wed, 19 Feb 2020 22:59:42 +0000 (14:59 -0800)]
ionic: fix fw_status read
The fw_status field is only 8 bits, so fix the read. Also,
we only want to look at the one status bit, to allow for future
use of the other bits, and watch for a bad PCI read.
Fixes: 97ca486592c0 ("ionic: add heartbeat check") Signed-off-by: Shannon Nelson <snelson@pensando.io> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Thu, 20 Feb 2020 23:15:16 +0000 (15:15 -0800)]
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
Pull IMA fixes from Mimi Zohar:
"Two bug fixes and an associated change for each.
The one that adds SM3 to the IMA list of supported hash algorithms is
a simple change, but could be considered a new feature"
* 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
ima: add sm3 algorithm to hash algorithm configuration list
crypto: rename sm3-256 to sm3 in hash_algo_name
efi: Only print errors about failing to get certs if EFI vars are found
x86/ima: use correct identifier for SetupMode variable
David S. Miller [Thu, 20 Feb 2020 23:04:49 +0000 (15:04 -0800)]
Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
Jeff Kirsher says:
====================
100GbE Intel Wired LAN Driver Updates 2020-02-19
This series contains updates to the ice driver only.
Avinash adds input validation for software DCB configurations received
via lldptool or pcap to ensure bad bandwidth inputs are not inputted
which could cause the loss of link.
Paul update the malicious driver detection event messages to rate limit
once per second and to include the total number of receive|transmit MDD
event count.
Dan updates how TCAM entries are managed to ensure when overriding
pre-existing TCAM entries, properly delete the existing entry and remove
it from the change/update list.
Brett ensures we clear the relevant values in the QRXFLXP_CNTXT register
for VF queues to ensure the receive queue data is not stale.
Avinash adds required DCBNL operations for configuring ETS in software
DCB CEE mode. Also added code to detect if DCB is in IEEE or CEE mode
to properly report what mode we are in.
Dave fixes the driver to properly report the current maximum TC, not the
maximum allowed number of TCs.
Krzysztof adds support for AF_XDP feature in the ice driver.
Jake increases the maximum time that the driver will wait for a PR reset
to account for possibility of a slightly longer than expected PD reset.
Jesse fixes a number of strings which did not have line feeds, so add
line feeds so that messages do not rum together, creating a jumbled
mess.
Bruce adds support for additional E810 and E823 device ids. Also
updated the product name change for E822 devices.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Roman Kiryanov [Wed, 19 Feb 2020 21:40:06 +0000 (13:40 -0800)]
net: disable BRIDGE_NETFILTER by default
The description says 'If unsure, say N.' but
the module is built as M by default (once
the dependencies are satisfied).
When the module is selected (Y or M), it enables
NETFILTER_FAMILY_BRIDGE and SKB_EXTENSIONS
which alter kernel internal structures.
We (Android Studio Emulator) currently do not
use this module and think this it is more consistent
to have it disabled by default as opposite to
disabling it explicitly to prevent enabling
NETFILTER_FAMILY_BRIDGE and SKB_EXTENSIONS.
Signed-off-by: Roman Kiryanov <rkir@google.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
projects / mirror_ubuntu-jammy-kernel.git / log