OSDN Git Service

uclinux-h8/linux.git
3 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Jakub Kicinski [Sat, 17 Apr 2021 17:42:54 +0000 (10:42 -0700)]
Merge git://git./linux/kernel/git/netdev/net

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
 - keep the ZC code, drop the code related to reinit
net/bridge/netfilter/ebtables.c
 - fix build after move to net_generic

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge tag 'net-5.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Sat, 17 Apr 2021 16:57:15 +0000 (09:57 -0700)]
Merge tag 'net-5.12-rc8' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Networking fixes for 5.12-rc8, including fixes from netfilter, and
  bpf. BPF verifier changes stand out, otherwise things have slowed
  down.

  Current release - regressions:

   - gro: ensure frag0 meets IP header alignment

   - Revert "net: stmmac: re-init rx buffers when mac resume back"

   - ethernet: macb: fix the restore of cmp registers

  Previous releases - regressions:

   - ixgbe: Fix NULL pointer dereference in ethtool loopback test

   - ixgbe: fix unbalanced device enable/disable in suspend/resume

   - phy: marvell: fix detection of PHY on Topaz switches

   - make tcp_allowed_congestion_control readonly in non-init netns

   - xen-netback: Check for hotplug-status existence before watching

  Previous releases - always broken:

   - bpf: mitigate a speculative oob read of up to map value size by
     tightening the masking window

   - sctp: fix race condition in sctp_destroy_sock

   - sit, ip6_tunnel: Unregister catch-all devices

   - netfilter: nftables: clone set element expression template

   - netfilter: flowtable: fix NAT IPv6 offload mangling

   - net: geneve: check skb is large enough for IPv4/IPv6 header

   - netlink: don't call ->netlink_bind with table lock held"

* tag 'net-5.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (52 commits)
  netlink: don't call ->netlink_bind with table lock held
  MAINTAINERS: update my email
  bpf: Update selftests to reflect new error states
  bpf: Tighten speculative pointer arithmetic mask
  bpf: Move sanitize_val_alu out of op switch
  bpf: Refactor and streamline bounds check into helper
  bpf: Improve verifier error messages for users
  bpf: Rework ptr_limit into alu_limit and add common error path
  bpf: Ensure off_reg has no mixed signed bounds for all types
  bpf: Move off_reg into sanitize_ptr_alu
  bpf: Use correct permission flag for mixed signed bounds arithmetic
  ch_ktls: do not send snd_una update to TCB in middle
  ch_ktls: tcb close causes tls connection failure
  ch_ktls: fix device connection close
  ch_ktls: Fix kernel panic
  i40e: fix the panic when running bpf in xdpdrv mode
  net/mlx5e: fix ingress_ifindex check in mlx5e_flower_parse_meta
  net/mlx5e: Fix setting of RS FEC mode
  net/mlx5: Fix setting of devlink traps in switchdev mode
  Revert "net: stmmac: re-init rx buffers when mac resume back"
  ...

3 years agoMerge tag 'libnvdimm-fixes-for-5.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 17 Apr 2021 16:40:44 +0000 (09:40 -0700)]
Merge tag 'libnvdimm-fixes-for-5.12-rc8' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:
 "The largest change is for a regression that landed during -rc1 for
  block-device read-only handling. Vaibhav found a new use for the
  ability (originally introduced by virtio_pmem) to call back to the
  platform to flush data, but also found an original bug in that
  implementation. Lastly, Arnd cleans up some compile warnings in dax.

  This has all appeared in -next with no reported issues.

  Summary:

   - Fix a regression of read-only handling in the pmem driver

   - Fix a compile warning

   - Fix support for platform cache flush commands on powerpc/papr"

* tag 'libnvdimm-fixes-for-5.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm/region: Fix nvdimm_has_flush() to handle ND_REGION_ASYNC
  libnvdimm: Notify disk drivers to revalidate region read-only
  dax: avoid -Wempty-body warnings

3 years agoMerge tag 'cxl-fixes-for-5.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 17 Apr 2021 16:30:58 +0000 (09:30 -0700)]
Merge tag 'cxl-fixes-for-5.12-rc8' of git://git./linux/kernel/git/cxl/cxl

Pull CXL memory class fixes from Dan Williams:
 "A collection of fixes for the CXL memory class driver introduced in
  this release cycle.

  The driver was primarily developed on a work-in-progress QEMU
  emulation of the interface and we have since found a couple places
  where it hid spec compliance bugs in the driver, or had a spec
  implementation bug itself.

  The biggest change here is replacing a percpu_ref with an rwsem to
  cleanup a couple bugs in the error unwind path during ioctl device
  init. Lastly there were some minor cleanups to not export the
  power-management sysfs-ABI for the ioctl device, use the proper sysfs
  helper for emitting values, and prevent subtle bugs as new
  administration commands are added to the supported list.

  The bulk of it has appeared in -next save for the top commit which was
  found today and validated on a fixed-up QEMU model.

  Summary:

   - Fix support for CXL memory devices with registers offset from the
     BAR base.

   - Fix the reporting of device capacity.

   - Fix the driver commands list definition to be disconnected from the
     UAPI command list.

   - Replace percpu_ref with rwsem to fix initialization error path.

   - Fix leaks in the driver initialization error path.

   - Drop the power/ directory from CXL device sysfs.

   - Use the recommended sysfs helper for attribute 'show'
     implementations"

* tag 'cxl-fixes-for-5.12-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
  cxl/mem: Fix memory device capacity probing
  cxl/mem: Fix register block offset calculation
  cxl/mem: Force array size of mem_commands[] to CXL_MEM_COMMAND_ID_MAX
  cxl/mem: Disable cxl device power management
  cxl/mem: Do not rely on device_add() side effects for dev_set_name() failures
  cxl/mem: Fix synchronization mechanism for device removal vs ioctl operations
  cxl/mem: Use sysfs_emit() for attribute show routines

3 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 17 Apr 2021 15:38:23 +0000 (08:38 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "12 patches.

  Subsystems affected by this patch series: mm (documentation, kasan,
  and pagemap), csky, ia64, gcov, and lib"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  lib: remove "expecting prototype" kernel-doc warnings
  gcov: clang: fix clang-11+ build
  mm: ptdump: fix build failure
  mm/mapping_dirty_helpers: guard hugepage pud's usage
  ia64: tools: remove duplicate definition of ia64_mf() on ia64
  ia64: tools: remove inclusion of ia64-specific version of errno.h header
  ia64: fix discontig.c section mismatches
  ia64: remove duplicate entries in generic_defconfig
  csky: change a Kconfig symbol name to fix e1000 build error
  kasan: remove redundant config option
  kasan: fix hwasan build for gcc
  mm: eliminate "expecting prototype" kernel-doc warnings

3 years agocxl/mem: Fix memory device capacity probing
Dan Williams [Sat, 17 Apr 2021 00:43:30 +0000 (17:43 -0700)]
cxl/mem: Fix memory device capacity probing

The CXL Identify Memory Device output payload emits capacity in 256MB
units. The driver is treating the capacity field as bytes. This was
missed because QEMU reports bytes when it should report bytes / 256MB.

Fixes: 8adaf747c9f0 ("cxl/mem: Find device capabilities")
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Cc: Ben Widawsky <ben.widawsky@intel.com>
Link: https://lore.kernel.org/r/161862021044.3259705.7008520073059739760.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
3 years agoMerge branch 'mptcp-fixes-and-tracepoints'
David S. Miller [Sat, 17 Apr 2021 00:10:40 +0000 (17:10 -0700)]
Merge branch 'mptcp-fixes-and-tracepoints'

Mat Martineau says:

====================
mptcp: Fixes and tracepoints from the mptcp tree

Here's one more batch of changes that we've tested out in the MPTCP tree.

Patch 1 makes the MPTCP KUnit config symbol more consistent with other
subsystems.

Patch 2 fixes a couple of format specifiers in pr_debug()s

Patches 3-7 add four helpful tracepoints for MPTCP.

Patch 8 is a one-line refactor to use an available helper macro.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: use mptcp_for_each_subflow in mptcp_close
Geliang Tang [Fri, 16 Apr 2021 22:38:08 +0000 (15:38 -0700)]
mptcp: use mptcp_for_each_subflow in mptcp_close

This patch used the macro helper mptcp_for_each_subflow() instead of
list_for_each_entry() in mptcp_close.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: add tracepoint in subflow_check_data_avail
Geliang Tang [Fri, 16 Apr 2021 22:38:07 +0000 (15:38 -0700)]
mptcp: add tracepoint in subflow_check_data_avail

This patch added a tracepoint in subflow_check_data_avail() to show the
mapping status.

Suggested-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: add tracepoint in ack_update_msk
Geliang Tang [Fri, 16 Apr 2021 22:38:06 +0000 (15:38 -0700)]
mptcp: add tracepoint in ack_update_msk

This patch added a tracepoint in ack_update_msk() to track the
incoming data_ack and window/snd_una updates.

Suggested-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: add tracepoint in get_mapping_status
Geliang Tang [Fri, 16 Apr 2021 22:38:05 +0000 (15:38 -0700)]
mptcp: add tracepoint in get_mapping_status

This patch added a tracepoint in the mapping status function
get_mapping_status() to dump every mpext field.

Suggested-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: add tracepoint in mptcp_subflow_get_send
Geliang Tang [Fri, 16 Apr 2021 22:38:04 +0000 (15:38 -0700)]
mptcp: add tracepoint in mptcp_subflow_get_send

This patch added a tracepoint in the packet scheduler function
mptcp_subflow_get_send().

Suggested-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: export mptcp_subflow_active
Geliang Tang [Fri, 16 Apr 2021 22:38:03 +0000 (15:38 -0700)]
mptcp: export mptcp_subflow_active

This patch moved the static function mptcp_subflow_active to protocol.h
as an inline one.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: fix format specifiers for unsigned int
Geliang Tang [Fri, 16 Apr 2021 22:38:02 +0000 (15:38 -0700)]
mptcp: fix format specifiers for unsigned int

Some of the sequence numbers are printed as the negative ones in the debug
log:

[   46.250932] MPTCP: DSS
[   46.250940] MPTCP: data_fin=0 dsn64=0 use_map=0 ack64=1 use_ack=1
[   46.250948] MPTCP: data_ack=2344892449471675613
[   46.251012] MPTCP: msk=000000006e157e3f status=10
[   46.251023] MPTCP: msk=000000006e157e3f snd_data_fin_enable=0 pending=0 snd_nxt=2344892449471700189 write_seq=2344892449471700189
[   46.251343] MPTCP: msk=00000000ec44a129 ssk=00000000f7abd481 sending dfrag at seq=-1658937016627538668 len=100 already sent=0
[   46.251360] MPTCP: data_seq=16787807057082012948 subflow_seq=1 data_len=100 dsn64=1

This patch used the format specifier %u instead of %d for the unsigned int
values to fix it.

Fixes: d9ca1de8c0cd ("mptcp: move page frag allocation in mptcp_sendmsg()")
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agokunit: mptcp: adhere to KUNIT formatting standard
Nico Pache [Fri, 16 Apr 2021 22:38:01 +0000 (15:38 -0700)]
kunit: mptcp: adhere to KUNIT formatting standard

Drop 'S' from end of CONFIG_MPTCP_KUNIT_TESTS in order to adhere to the
KUNIT *_KUNIT_TEST config name format.

Fixes: a00a582203db (mptcp: move crypto test to KUNIT)
Reviewed-by: David Gow <davidgow@google.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Nico Pache <npache@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge branch 'enetc-xdp-fixes'
David S. Miller [Sat, 17 Apr 2021 00:08:40 +0000 (17:08 -0700)]
Merge branch 'enetc-xdp-fixes'

Vladimir Oltean says:

====================
Fixups for XDP on NXP ENETC

After some more XDP testing on the NXP LS1028A, this is a set of 10 bug
fixes, simplifications and tweaks, ranging from addressing Toke's feedback
(the network stack can run concurrently with XDP on the same TX rings)
to fixing some OOM conditions seen under TX congestion.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: apply the MDIO workaround for XDP_REDIRECT too
Vladimir Oltean [Fri, 16 Apr 2021 21:22:25 +0000 (00:22 +0300)]
net: enetc: apply the MDIO workaround for XDP_REDIRECT too

Described in fd5736bf9f23 ("enetc: Workaround for MDIO register access
issue") is a workaround for a hardware bug that requires a register
access of the MDIO controller to never happen concurrently with a
register access of a port PF. To avoid that, a mutual exclusion scheme
with rwlocks was implemented - the port PF accessors are the 'read'
side, and the MDIO accessors are the 'write' side.

When we do XDP_REDIRECT between two ENETC interfaces, all is fine
because the MDIO lock is already taken from the NAPI poll loop.

But when the ingress interface is not ENETC, just the egress is, the
MDIO lock is not taken, so we might access the port PF registers
concurrently with MDIO, which will make the link flap due to wrong
values returned from the PHY.

To avoid this, let's just slap an enetc_lock_mdio/enetc_unlock_mdio at
the beginning and ending of enetc_xdp_xmit. The fact that the MDIO lock
is designed as a rwlock is important here, because the read side is
reentrant (that is one of the main reasons why we chose it). Usually,
the way we benefit of its reentrancy is by running the data path
concurrently on both CPUs, but in this case, we benefit from the
reentrancy by taking the lock even when the lock is already taken
(and that's the situation where ENETC is both the ingress and the egress
interface for XDP_REDIRECT, which was fine before and still is fine now).

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: fix buffer leaks with XDP_TX enqueue rejections
Vladimir Oltean [Fri, 16 Apr 2021 21:22:24 +0000 (00:22 +0300)]
net: enetc: fix buffer leaks with XDP_TX enqueue rejections

If the TX ring is congested, enetc_xdp_tx() returns false for the
current XDP frame (represented as an array of software BDs).

This array of software TX BDs is constructed in enetc_rx_swbd_to_xdp_tx_swbd
from software BDs freshly cleaned from the RX ring. The issue is that we
scrub the RX software BDs too soon, more precisely before we know that
we can enqueue the TX BDs successfully into the TX ring.

If we can't enqueue them (and enetc_xdp_tx returns false), we call
enetc_xdp_drop which attempts to recycle the buffers held by the RX
software BDs. But because we scrubbed those RX BDs already, two things
happen:

(a) we leak their memory
(b) we populate the RX software BD ring with an all-zero rx_swbd
    structure, which makes the buffer refill path allocate more memory.

enetc_refill_rx_ring
-> if (unlikely(!rx_swbd->page))
   -> enetc_new_page

That is a recipe for fast OOM.

Fixes: 7ed2bc80074e ("net: enetc: add support for XDP_TX")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: handle the invalid XDP action the same way as XDP_DROP
Vladimir Oltean [Fri, 16 Apr 2021 21:22:23 +0000 (00:22 +0300)]
net: enetc: handle the invalid XDP action the same way as XDP_DROP

When the XDP program returns an invalid action, we should free the RX
buffer.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: use dedicated TX rings for XDP
Vladimir Oltean [Fri, 16 Apr 2021 21:22:22 +0000 (00:22 +0300)]
net: enetc: use dedicated TX rings for XDP

It is possible for one CPU to perform TX hashing (see netdev_pick_tx)
between the 8 ENETC TX rings, and the TX hashing to select TX queue 1.

At the same time, it is possible for the other CPU to already use TX
ring 1 for XDP (either XDP_TX or XDP_REDIRECT). Since there is no mutual
exclusion between XDP and the network stack, we run into an issue
because the ENETC TX procedure is not reentrant.

The obvious approach would be to just make XDP take the lock of the
network stack's TX queue corresponding to the ring it's about to enqueue
in.

For XDP_REDIRECT, this is quite straightforward, a lock at the beginning
and end of enetc_xdp_xmit() should do the trick.

But for XDP_TX, it's a bit more complicated. For one, we do TX batching
all by ourselves for frames with the XDP_TX verdict. This is something
we would like to keep the way it is, for performance reasons. But
batching means that the network stack's lock should be kept from the
first enqueued XDP_TX frame and until we ring the doorbell. That is
mostly fine, except for cases when in the same NAPI loop we have mixed
XDP_TX and XDP_REDIRECT frames. So if enetc_xdp_xmit() gets called while
we are holding the lock from the RX NAPI, then bam, deadlock. The naive
answer could be 'just flush the XDP_TX frames first, then release the
network stack's TX queue lock, then call xdp_do_flush_map()'. But even
xdp_do_redirect() is capable of flushing the batched XDP_REDIRECT
frames, so unless we unlock/relock the TX queue around xdp_do_redirect(),
there simply isn't any clean way to protect XDP_TX from concurrent
network stack .ndo_start_xmit() on another CPU.

So we need to take a different approach, and that is to reserve two
rings for the sole use of XDP. We leave TX rings
0..ndev->real_num_tx_queues-1 to be handled by the network stack, and we
pick them from the end of the priv->tx_ring array.

We make an effort to keep the mapping done by enetc_alloc_msix() which
decides which CPU handles the TX completions of which TX ring in its
NAPI poll. So the XDP TX ring of CPU 0 is handled by TX ring 6, and the
XDP TX ring of CPU 1 is handled by TX ring 7.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: increase TX ring size
Vladimir Oltean [Fri, 16 Apr 2021 21:22:21 +0000 (00:22 +0300)]
net: enetc: increase TX ring size

Now that commit d6a2829e82cf ("net: enetc: increase RX ring default
size") has increased the RX ring size, it is quite easy to congest the
TX rings when the traffic is predominantly XDP_TX, as the RX ring is
quite a bit larger than the TX one.

Since we bit the bullet and did the expensive thing already (larger RX
rings consume more memory pages), it seems quite foolish to keep the TX
rings small. So make them equally sized with TX.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: remove unneeded xdp_do_flush_map()
Vladimir Oltean [Fri, 16 Apr 2021 21:22:20 +0000 (00:22 +0300)]
net: enetc: remove unneeded xdp_do_flush_map()

xdp_do_redirect already contains:
-> dev_map_enqueue
   -> __xdp_enqueue
      -> bq_enqueue
         -> bq_xmit_all // if we have more than 16 frames

So the logic from enetc will never be hit, because ENETC_DEFAULT_TX_WORK
is 128.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: stop XDP NAPI processing when build_skb() fails
Vladimir Oltean [Fri, 16 Apr 2021 21:22:19 +0000 (00:22 +0300)]
net: enetc: stop XDP NAPI processing when build_skb() fails

When the code path below fails:

enetc_clean_rx_ring_xdp // XDP_PASS
-> enetc_build_skb
   -> enetc_map_rx_buff_to_skb
      -> build_skb

enetc_clean_rx_ring_xdp will 'break', but that 'break' instruction isn't
strong enough to actually break the NAPI poll loop, just the switch/case
statement for XDP actions. So we increment rx_frm_cnt and go to the next
frames minding our own business.

Instead let's do what the skb NAPI poll function does, and break the
loop now, waiting for the memory pressure to go away. Otherwise the next
calls to build_skb() are likely to fail too.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: recycle buffers for frames with RX errors
Vladimir Oltean [Fri, 16 Apr 2021 21:22:18 +0000 (00:22 +0300)]
net: enetc: recycle buffers for frames with RX errors

When receiving a frame with errors, currently we do nothing with it (we
don't construct an skb or an xdp_buff), we just exit the NAPI poll loop.

Let's put the buffer back into the RX ring (similar to XDP_DROP).

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: rename the buffer reuse helpers
Vladimir Oltean [Fri, 16 Apr 2021 21:22:17 +0000 (00:22 +0300)]
net: enetc: rename the buffer reuse helpers

enetc_put_xdp_buff has nothing to do with XDP, frankly, it is just a
helper to populate the recycle end of the shadow RX BD ring
(next_to_alloc) with a given buffer.

On the other hand, enetc_put_rx_buff plays more tricks than its name
would suggest.

So let's rename enetc_put_rx_buff into enetc_flip_rx_buff to reflect the
half-page buffer reuse tricks that it employs, and enetc_put_xdp_buff
into enetc_put_rx_buff which suggests a more garden-variety operation.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: enetc: remove redundant clearing of skb/xdp_frame pointer in TX conf path
Vladimir Oltean [Fri, 16 Apr 2021 21:22:16 +0000 (00:22 +0300)]
net: enetc: remove redundant clearing of skb/xdp_frame pointer in TX conf path

Later in enetc_clean_tx_ring we have:

/* Scrub the swbd here so we don't have to do that
 * when we reuse it during xmit
 */
memset(tx_swbd, 0, sizeof(*tx_swbd));

So these assignments are unnecessary.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue
David S. Miller [Sat, 17 Apr 2021 00:06:14 +0000 (17:06 -0700)]
Merge branch '1GbE' of git://git./linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
1GbE Intel Wired LAN Driver Updates 2021-04-16

This series contains updates to igb and igc drivers.

Ederson adjusts Tx buffer distributions in Qav mode to improve
TSN-aware traffic for igb. He also enable PPS support and auxiliary PHC
functions for igc.

Grzegorz checks that the MTA register was properly written and
retries if not for igb.

Sasha adds reporting of EEE low power idle counters to ethtool and fixes
a return value being overwritten through looping for igc.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoflow_dissector: Fix out-of-bounds warning in __skb_flow_bpf_to_target()
Gustavo A. R. Silva [Fri, 16 Apr 2021 19:31:51 +0000 (14:31 -0500)]
flow_dissector: Fix out-of-bounds warning in __skb_flow_bpf_to_target()

Fix the following out-of-bounds warning:

net/core/flow_dissector.c:835:3: warning: 'memcpy' offset [33, 48] from the object at 'flow_keys' is out of the bounds of referenced subobject 'ipv6_src' with type '__u32[4]' {aka 'unsigned int[4]'} at offset 16 [-Warray-bounds]

The problem is that the original code is trying to copy data into a
couple of struct members adjacent to each other in a single call to
memcpy().  So, the compiler legitimately complains about it. As these
are just a couple of members, fix this by copying each one of them in
separate calls to memcpy().

This helps with the ongoing efforts to globally enable -Warray-bounds
and get us closer to being able to tighten the FORTIFY_SOURCE routines
on memcpy().

Link: https://github.com/KSPP/linux/issues/109
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonetlink: don't call ->netlink_bind with table lock held
Florian Westphal [Fri, 16 Apr 2021 19:29:13 +0000 (21:29 +0200)]
netlink: don't call ->netlink_bind with table lock held

When I added support to allow generic netlink multicast groups to be
restricted to subscribers with CAP_NET_ADMIN I was unaware that a
genl_bind implementation already existed in the past.

It was reverted due to ABBA deadlock:

1. ->netlink_bind gets called with the table lock held.
2. genetlink bind callback is invoked, it grabs the genl lock.

But when a new genl subsystem is (un)registered, these two locks are
taken in reverse order.

One solution would be to revert again and add a comment in genl
referring 1e82a62fec613, "genetlink: remove genl_bind").

This would need a second change in mptcp to not expose the raw token
value anymore, e.g.  by hashing the token with a secret key so userspace
can still associate subflow events with the correct mptcp connection.

However, Paolo Abeni reminded me to double-check why the netlink table is
locked in the first place.

I can't find one.  netlink_bind() is already called without this lock
when userspace joins a group via NETLINK_ADD_MEMBERSHIP setsockopt.
Same holds for the netlink_unbind operation.

Digging through the history, commit f773608026ee1
("netlink: access nlk groups safely in netlink bind and getname")
expanded the lock scope.

commit 3a20773beeeeade ("net: netlink: cap max groups which will be considered in netlink_bind()")
... removed the nlk->ngroups access that the lock scope
extension was all about.

Reduce the lock scope again and always call ->netlink_bind without
the table lock.

The Fixes tag should be vs. the patch mentioned in the link below,
but that one got squash-merged into the patch that came earlier in the
series.

Fixes: 4d54cc32112d8d ("mptcp: avoid lock_fast usage in accept path")
Link: https://lore.kernel.org/mptcp/20210213000001.379332-8-mathew.j.martineau@linux.intel.com/T/#u
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Xin Long <lucien.xin@gmail.com>
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Sean Tranchetti <stranche@codeaurora.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge branch 'ethtool-stats'
David S. Miller [Sat, 17 Apr 2021 00:00:03 +0000 (17:00 -0700)]
Merge branch 'ethtool-stats'

Jakub Kicinski says:

====================
ethtool: add uAPI for reading standard stats

Continuing the effort of providing a unified access method
to standard stats, and explicitly tying the definitions to
the standards this series adds an API for general stats
which do no fit into more targeted control APIs.

There is nothing clever here, just a netlink API for dumping
statistics defined by standards and RFCs which today end up
in ethtool -S under infinite variations of names.

This series adds basic IEEE stats (for PHY, MAC, Ctrl frames)
and RMON stats. AFAICT other RFCs only duplicate the IEEE
stats.

This series does _not_ add a netlink API to read driver-defined
stats. There seems to be little to gain from moving that part
to netlink.

The netlink message format is very simple, and aims to allow
adding stats and groups with no changes to user tooling (which
IIUC is expected for ethtool).

On user space side we can re-use -S, and make it dump
standard stats if --groups are defined.

$ ethtool -S eth0 --groups eth-phy eth-mac eth-ctrl rmon
Stats for eth0:
eth-phy-SymbolErrorDuringCarrier: 0
eth-mac-FramesTransmittedOK: 0
eth-mac-FrameTooLongErrors: 0
eth-ctrl-MACControlFramesTransmitted: 0
eth-ctrl-MACControlFramesReceived: 1
eth-ctrl-UnsupportedOpcodesReceived: 0
rmon-etherStatsUndersizePkts: 0
rmon-etherStatsJabbers: 0
rmon-rx-etherStatsPkts64Octets: 1
rmon-rx-etherStatsPkts128to255Octets: 0
rmon-rx-etherStatsPkts1024toMaxOctets: 1
rmon-tx-etherStatsPkts64Octets: 1
rmon-tx-etherStatsPkts128to255Octets: 0
rmon-tx-etherStatsPkts1024toMaxOctets: 1

v1:

Driver support for mlxsw, mlx5 and bnxt included.

Compared to the RFC I went ahead with wrapping the stats into
a 1:1 nest. Now IDs of stats can start from 0, at a cost of
slightly "careful" u64 alignment handling.

v2:

Add missing kdoc in patch 5.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomlx5: implement ethtool standard stats
Jakub Kicinski [Fri, 16 Apr 2021 19:27:45 +0000 (12:27 -0700)]
mlx5: implement ethtool standard stats

Add support for PHY/MAC/Ctrl/RMON stats.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agobnxt: implement ethtool standard stats
Jakub Kicinski [Fri, 16 Apr 2021 19:27:44 +0000 (12:27 -0700)]
bnxt: implement ethtool standard stats

Most of the names seem to strongly correlate with names from
the standard and RFC. Whether ..+good_frames are indeed Frames..OK
I'm the least sure of.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomlxsw: implement ethtool standard stats
Jakub Kicinski [Fri, 16 Apr 2021 19:27:43 +0000 (12:27 -0700)]
mlxsw: implement ethtool standard stats

mlxsw has nicely grouped stats, add support for standard uAPI.
I'm guessing the register access part. Compile tested only.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoethtool: add interface to read RMON stats
Jakub Kicinski [Fri, 16 Apr 2021 19:27:42 +0000 (12:27 -0700)]
ethtool: add interface to read RMON stats

Most devices maintain RMON (RFC 2819) stats - particularly
the "histogram" of packets received by size. Unlike other
RFCs which duplicate IEEE stats, the short/oversized frame
counters in RMON don't seem to match IEEE stats 1-to-1 either,
so expose those, too. Do not expose basic packet, CRC errors
etc - those are already otherwise covered.

Because standard defines packet ranges only up to 1518, and
everything above that should theoretically be "oversized"
- devices often create their own ranges.

Going beyond what the RFC defines - expose the "histogram"
in the Tx direction (assume for now that the ranges will
be the same).

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoethtool: add interface to read standard MAC Ctrl stats
Jakub Kicinski [Fri, 16 Apr 2021 19:27:41 +0000 (12:27 -0700)]
ethtool: add interface to read standard MAC Ctrl stats

Number of devices maintains the standard-based MAC control
counters for control frames. Add a API for those.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoethtool: add interface to read standard MAC stats
Jakub Kicinski [Fri, 16 Apr 2021 19:27:40 +0000 (12:27 -0700)]
ethtool: add interface to read standard MAC stats

Most of the MAC statistics are included in
struct rtnl_link_stats64, but some fields
are aggregated. Besides it's good to expose
these clearly hardware stats separately.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoethtool: add a new command for reading standard stats
Jakub Kicinski [Fri, 16 Apr 2021 19:27:39 +0000 (12:27 -0700)]
ethtool: add a new command for reading standard stats

Add an interface for reading standard stats, including
stats which don't have a corresponding control interface.

Start with IEEE 802.3 PHY stats. There seems to be only
one stat to expose there.

Define API to not require user space changes when new
stats or groups are added. Groups are based on bitset,
stats have a string set associated.

v1: wrap stats in a nest

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agodocs: ethtool: document standard statistics
Jakub Kicinski [Fri, 16 Apr 2021 19:27:38 +0000 (12:27 -0700)]
docs: ethtool: document standard statistics

Add documentation for ETHTOOL_MSG_STATS_GET.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agodocs: networking: extend the statistics documentation
Jakub Kicinski [Fri, 16 Apr 2021 19:27:37 +0000 (12:27 -0700)]
docs: networking: extend the statistics documentation

Make the lack of expectations for switching NICs explicit,
describe the new stats.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agosctp: Fix out-of-bounds warning in sctp_process_asconf_param()
Gustavo A. R. Silva [Fri, 16 Apr 2021 19:12:36 +0000 (14:12 -0500)]
sctp: Fix out-of-bounds warning in sctp_process_asconf_param()

Fix the following out-of-bounds warning:

net/sctp/sm_make_chunk.c:3150:4: warning: 'memcpy' offset [17, 28] from the object at 'addr' is out of the bounds of referenced subobject 'v4' with type 'struct sockaddr_in' at offset 0 [-Warray-bounds]

This helps with the ongoing efforts to globally enable -Warray-bounds
and get us closer to being able to tighten the FORTIFY_SOURCE routines
on memcpy().

Link: https://github.com/KSPP/linux/issues/109
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge tag 'mlx5-updates-2021-04-16' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Fri, 16 Apr 2021 23:53:52 +0000 (16:53 -0700)]
Merge tag 'mlx5-updates-2021-04-16' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-updates-2021-04-16

This patchset introduces updates to mlx5e netdev driver.

1) Tariq refactors TLS offloads and adds resiliency against RX resync
   failures

2) Maxim reduces code duplications by unifying channels reset flow
   regardless if channels are closed or open

3) Aya Enhances TX/RX health reporters diagnostics to expose the
   internal clock time-stamping format

4) Moshe adds support for ethtool extended link state, to show the reason
   for link down
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge tag 'io_uring-5.12-2021-04-16' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 16 Apr 2021 23:18:53 +0000 (16:18 -0700)]
Merge tag 'io_uring-5.12-2021-04-16' of git://git.kernel.dk/linux-block

Pull io_uring fix from Jens Axboe:
 "Fix for a potential hang at exit with SQPOLL from Pavel"

* tag 'io_uring-5.12-2021-04-16' of git://git.kernel.dk/linux-block:
  io_uring: fix early sqd_list removal sqpoll hangs

3 years agolib: remove "expecting prototype" kernel-doc warnings
Randy Dunlap [Fri, 16 Apr 2021 22:46:26 +0000 (15:46 -0700)]
lib: remove "expecting prototype" kernel-doc warnings

Fix various kernel-doc warnings in lib/ due to missing or erroneous
function names.

Add kernel-doc for some function parameters that was missing.  Use
kernel-doc "Return:" notation in earlycpio.c.

Quietens the following warnings:

  lib/earlycpio.c:61: warning: expecting prototype for cpio_data find_cpio_data(). Prototype was for find_cpio_data() instead

  lib/lru_cache.c:640: warning: expecting prototype for lc_dump(). Prototype was for lc_seq_dump_details() instead
  lru_cache.c:90: warning: Function parameter or member 'cache' not described in 'lc_create'

  lib/parman.c:368: warning: expecting prototype for parman_item_del(). Prototype was for parman_item_remove() instead
  parman.c:309: warning: Excess function parameter 'prority' description in 'parman_prio_init'

  lib/radix-tree.c:703: warning: expecting prototype for __radix_tree_insert(). Prototype was for radix_tree_insert() instead
  radix-tree.c:180: warning: Excess function parameter 'addr' description in 'radix_tree_find_next_bit'
  radix-tree.c:180: warning: Excess function parameter 'size' description in 'radix_tree_find_next_bit'
  radix-tree.c:931: warning: Function parameter or member 'iter' not described in 'radix_tree_iter_replace'

Link: https://lkml.kernel.org/r/20210411221756.15461-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Cc: Jiri Pirko <jiri@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agogcov: clang: fix clang-11+ build
Johannes Berg [Fri, 16 Apr 2021 22:46:23 +0000 (15:46 -0700)]
gcov: clang: fix clang-11+ build

With clang-11+, the code is broken due to my kvmalloc() conversion
(which predated the clang-11 support code) leaving one vmalloc() in
place.  Fix that.

Link: https://lkml.kernel.org/r/20210412214210.6e1ecca9cdc5.I24459763acf0591d5e6b31c7e3a59890d802f79c@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomm: ptdump: fix build failure
Christophe Leroy [Fri, 16 Apr 2021 22:46:20 +0000 (15:46 -0700)]
mm: ptdump: fix build failure

READ_ONCE() cannot be used for reading PTEs.  Use ptep_get() instead, to
avoid the following errors:

    CC      mm/ptdump.o
  In file included from <command-line>:
  mm/ptdump.c: In function 'ptdump_pte_entry':
  include/linux/compiler_types.h:320:38: error: call to '__compiletime_assert_207' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().
    320 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
        |                                      ^
  include/linux/compiler_types.h:301:4: note: in definition of macro '__compiletime_assert'
    301 |    prefix ## suffix();    \
        |    ^~~~~~
  include/linux/compiler_types.h:320:2: note: in expansion of macro '_compiletime_assert'
    320 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
        |  ^~~~~~~~~~~~~~~~~~~
  include/asm-generic/rwonce.h:36:2: note: in expansion of macro 'compiletime_assert'
     36 |  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
        |  ^~~~~~~~~~~~~~~~~~
  include/asm-generic/rwonce.h:49:2: note: in expansion of macro 'compiletime_assert_rwonce_type'
     49 |  compiletime_assert_rwonce_type(x);    \
        |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  mm/ptdump.c:114:14: note: in expansion of macro 'READ_ONCE'
    114 |  pte_t val = READ_ONCE(*pte);
        |              ^~~~~~~~~
  make[2]: *** [mm/ptdump.o] Error 1

See commit 481e980a7c19 ("mm: Allow arches to provide ptep_get()") and
commit c0e1c8c22beb ("powerpc/8xx: Provide ptep_get() with 16k pages")
for details.

Link: https://lkml.kernel.org/r/912b349e2bcaa88939904815ca0af945740c6bd4.1618478922.git.christophe.leroy@csgroup.eu
Fixes: 30d621f6723b ("mm: add generic ptdump")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Steven Price <steven.price@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomm/mapping_dirty_helpers: guard hugepage pud's usage
Zack Rusin [Fri, 16 Apr 2021 22:46:18 +0000 (15:46 -0700)]
mm/mapping_dirty_helpers: guard hugepage pud's usage

Mapping dirty helpers have, so far, been only used on X86, but a port of
vmwgfx to ARM64 exposed a problem which results in a compilation error
on ARM64 systems:

  mm/mapping_dirty_helpers.c: In function `wp_clean_pud_entry':
  mm/mapping_dirty_helpers.c:172:32: error: implicit declaration of function `pud_dirty'; did you mean `pmd_dirty'? [-Werror=implicit-function-declaration]

This is due to the fact that mapping_dirty_helpers code assumes that
pud_dirty is always defined, which is not the case for architectures
that don't define CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD.

ARM64 arch is a little inconsistent when it comes to PUD hugepage
helpers, e.g. it defines pud_young but not pud_dirty but regardless of
that the core kernel code shouldn't assume that any of the PUD hugepage
helpers are available unless CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
is defined.  This prevents compilation errors whenever one of the
drivers is ported to new architectures.

Link: https://lkml.kernel.org/r/20210409165151.694574-1-zackr@vmware.com
Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Thomas Hellstrm (Intel) <thomas_os@shipmail.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoia64: tools: remove duplicate definition of ia64_mf() on ia64
John Paul Adrian Glaubitz [Fri, 16 Apr 2021 22:46:15 +0000 (15:46 -0700)]
ia64: tools: remove duplicate definition of ia64_mf() on ia64

The ia64_mf() macro defined in tools/arch/ia64/include/asm/barrier.h is
already defined in <asm/gcc_intrin.h> on ia64 which causes libbpf
failing to build:

    CC       /usr/src/linux/tools/bpf/bpftool//libbpf/staticobjs/libbpf.o
  In file included from /usr/src/linux/tools/include/asm/barrier.h:24,
                   from /usr/src/linux/tools/include/linux/ring_buffer.h:4,
                   from libbpf.c:37:
  /usr/src/linux/tools/include/asm/../../arch/ia64/include/asm/barrier.h:43: error: "ia64_mf" redefined [-Werror]
     43 | #define ia64_mf()       asm volatile ("mf" ::: "memory")
        |
  In file included from /usr/include/ia64-linux-gnu/asm/intrinsics.h:20,
                   from /usr/include/ia64-linux-gnu/asm/swab.h:11,
                   from /usr/include/linux/swab.h:8,
                   from /usr/include/linux/byteorder/little_endian.h:13,
                   from /usr/include/ia64-linux-gnu/asm/byteorder.h:5,
                   from /usr/src/linux/tools/include/uapi/linux/perf_event.h:20,
                   from libbpf.c:36:
  /usr/include/ia64-linux-gnu/asm/gcc_intrin.h:382: note: this is the location of the previous definition
    382 | #define ia64_mf() __asm__ volatile ("mf" ::: "memory")
        |
  cc1: all warnings being treated as errors

Thus, remove the definition from tools/arch/ia64/include/asm/barrier.h.

Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoia64: tools: remove inclusion of ia64-specific version of errno.h header
John Paul Adrian Glaubitz [Fri, 16 Apr 2021 22:46:12 +0000 (15:46 -0700)]
ia64: tools: remove inclusion of ia64-specific version of errno.h header

There is no longer an ia64-specific version of the errno.h header below
arch/ia64/include/uapi/asm/, so trying to build tools/bpf fails with:

    CC       /usr/src/linux/tools/bpf/bpftool/btf_dumper.o
  In file included from /usr/src/linux/tools/include/linux/err.h:8,
                   from btf_dumper.c:11:
  /usr/src/linux/tools/include/uapi/asm/errno.h:13:10: fatal error: ../../../arch/ia64/include/uapi/asm/errno.h: No such file or directory
     13 | #include "../../../arch/ia64/include/uapi/asm/errno.h"
        |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  compilation terminated.

Thus, just remove the inclusion of the ia64-specific errno.h so that the
build will use the generic errno.h header on this target which was used
there anyway as the ia64-specific errno.h was just a wrapper for the
generic header.

Fixes: c25f867ddd00 ("ia64: remove unneeded uapi asm-generic wrappers")
Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoia64: fix discontig.c section mismatches
Randy Dunlap [Fri, 16 Apr 2021 22:46:09 +0000 (15:46 -0700)]
ia64: fix discontig.c section mismatches

Fix IA64 discontig.c Section mismatch warnings.

When CONFIG_SPARSEMEM=y and CONFIG_MEMORY_HOTPLUG=y, the functions
computer_pernodesize() and scatter_node_data() should not be marked as
__meminit because they are needed after init, on any memory hotplug
event.  Also, early_nr_cpus_node() is called by compute_pernodesize(),
so early_nr_cpus_node() cannot be __meminit either.

  WARNING: modpost: vmlinux.o(.text.unlikely+0x1612): Section mismatch in reference from the function arch_alloc_nodedata() to the function .meminit.text:compute_pernodesize()
  The function arch_alloc_nodedata() references the function __meminit compute_pernodesize().
  This is often because arch_alloc_nodedata lacks a __meminit annotation or the annotation of compute_pernodesize is wrong.

  WARNING: modpost: vmlinux.o(.text.unlikely+0x1692): Section mismatch in reference from the function arch_refresh_nodedata() to the function .meminit.text:scatter_node_data()
  The function arch_refresh_nodedata() references the function __meminit scatter_node_data().
  This is often because arch_refresh_nodedata lacks a __meminit annotation or the annotation of scatter_node_data is wrong.

  WARNING: modpost: vmlinux.o(.text.unlikely+0x1502): Section mismatch in reference from the function compute_pernodesize() to the function .meminit.text:early_nr_cpus_node()
  The function compute_pernodesize() references the function __meminit early_nr_cpus_node().
  This is often because compute_pernodesize lacks a __meminit annotation or the annotation of early_nr_cpus_node is wrong.

Link: https://lkml.kernel.org/r/20210411001201.3069-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Mike Rapoport <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoia64: remove duplicate entries in generic_defconfig
Randy Dunlap [Fri, 16 Apr 2021 22:46:06 +0000 (15:46 -0700)]
ia64: remove duplicate entries in generic_defconfig

Fix ia64 generic_defconfig duplicate entries, as warned by:

  arch/ia64/configs/generic_defconfig: warning: override: reassigning to symbol ATA:  => 58
  arch/ia64/configs/generic_defconfig: warning: override: reassigning to symbol ATA_PIIX:  => 59

These 2 symbols still have the same value as in the removed lines.

Link: https://lkml.kernel.org/r/20210411020255.18052-1-rdunlap@infradead.org
Fixes: c331649e6371 ("ia64: Use libata instead of the legacy ide driver in defconfigs")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agocsky: change a Kconfig symbol name to fix e1000 build error
Randy Dunlap [Fri, 16 Apr 2021 22:46:03 +0000 (15:46 -0700)]
csky: change a Kconfig symbol name to fix e1000 build error

e1000's #define of CONFIG_RAM_BASE conflicts with a Kconfig symbol in
arch/csky/Kconfig.

The symbol in e1000 has been around longer, so change arch/csky/ to use
DRAM_BASE instead of RAM_BASE to remove the conflict.  (although e1000
is also a 2-line change)

Link: https://lkml.kernel.org/r/20210411055335.7111-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Guo Ren <guoren@kernel.org>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agokasan: remove redundant config option
Walter Wu [Fri, 16 Apr 2021 22:46:00 +0000 (15:46 -0700)]
kasan: remove redundant config option

CONFIG_KASAN_STACK and CONFIG_KASAN_STACK_ENABLE both enable KASAN stack
instrumentation, but we should only need one config, so that we remove
CONFIG_KASAN_STACK_ENABLE and make CONFIG_KASAN_STACK workable.  see [1].

When enable KASAN stack instrumentation, then for gcc we could do no
prompt and default value y, and for clang prompt and default value n.

This patch fixes the following compilation warning:

  include/linux/kasan.h:333:30: warning: 'CONFIG_KASAN_STACK' is not defined, evaluates to 0 [-Wundef]

[akpm@linux-foundation.org: fix merge snafu]

Link: https://bugzilla.kernel.org/show_bug.cgi?id=210221
Link: https://lkml.kernel.org/r/20210226012531.29231-1-walter-zh.wu@mediatek.com
Fixes: d9b571c885a8 ("kasan: fix KASAN_STACK dependency for HW_TAGS")
Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com>
Suggested-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agokasan: fix hwasan build for gcc
Arnd Bergmann [Fri, 16 Apr 2021 22:45:57 +0000 (15:45 -0700)]
kasan: fix hwasan build for gcc

gcc-11 adds support for -fsanitize=kernel-hwaddress, so it becomes
possible to enable CONFIG_KASAN_SW_TAGS.

Unfortunately this fails to build at the moment, because the
corresponding command line arguments use llvm specific syntax.

Change it to use the cc-param macro instead, which works on both clang
and gcc.

[elver@google.com: fixup for "kasan: fix hwasan build for gcc"]
Link: https://lkml.kernel.org/r/YHQZVfVVLE/LDK2v@elver.google.com
Link: https://lkml.kernel.org/r/20210323124112.1229772-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Acked-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomm: eliminate "expecting prototype" kernel-doc warnings
Randy Dunlap [Fri, 16 Apr 2021 22:45:54 +0000 (15:45 -0700)]
mm: eliminate "expecting prototype" kernel-doc warnings

Fix stray kernel-doc warnings in mm/ due to mis-typed or missing function
names.

Quietens these kernel-doc warnings:

  mm/mmu_gather.c:264: warning: expecting prototype for tlb_gather_mmu(). Prototype was for __tlb_gather_mmu() instead
  mm/oom_kill.c:180: warning: expecting prototype for Check whether unreclaimable slab amount is greater than(). Prototype was for should_dump_unreclaim_slab() instead
  mm/shuffle.c:155: warning: expecting prototype for shuffle_free_memory(). Prototype was for __shuffle_free_memory() instead

Link: https://lkml.kernel.org/r/20210411210642.11362-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Fri, 16 Apr 2021 22:48:08 +0000 (15:48 -0700)]
Merge git://git./pub/scm/linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2021-04-17

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

We've added 10 non-merge commits during the last 9 day(s) which contain
a total of 8 files changed, 175 insertions(+), 111 deletions(-).

The main changes are:

1) Fix a potential NULL pointer dereference in libbpf's xsk
   umem handling, from Ciara Loftus.

2) Mitigate a speculative oob read of up to map value size by
   tightening the masking window, from Daniel Borkmann.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge branch 'gianfar-mq-polling'
David S. Miller [Fri, 16 Apr 2021 22:46:15 +0000 (15:46 -0700)]
Merge branch 'gianfar-mq-polling'

Claudiu Manoil says:

====================
net: gianfar: Drop GFAR_MQ_POLLING support

Drop long time obsolete "per NAPI multi-queue" support in gianfar,
and related (and undocumented) device tree properties.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agopowerpc: dts: fsl: Drop obsolete fsl,rx-bit-map and fsl,tx-bit-map properties
Claudiu Manoil [Fri, 16 Apr 2021 17:11:23 +0000 (20:11 +0300)]
powerpc: dts: fsl: Drop obsolete fsl,rx-bit-map and fsl,tx-bit-map properties

These are very old properties that were used by the "gianfar" ethernet
driver.  They don't have documented bindings and are obsolete.

Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agogianfar: Drop GFAR_MQ_POLLING support
Claudiu Manoil [Fri, 16 Apr 2021 17:11:22 +0000 (20:11 +0300)]
gianfar: Drop GFAR_MQ_POLLING support

Gianfar used to enable all 8 Rx queues (DMA rings) per
ethernet device, even though the controller can only
support 2 interrupt lines at most.  This meant that
multiple Rx queues would have to be grouped per NAPI poll
routine, and the CPU would have to split the budget and
service them in a round robin manner.  The overhead of
this scheme proved to outweight the potential benefits.
The alternative was to introduce the "Single Queue" polling
mode, supporting one Rx queue per NAPI, which became the
default packet processing option and helped improve the
performance of the driver.
MQ_POLLING also relies on undocumeted device tree properties
to specify how to map the 8 Rx and Tx queues to a given
interrupt line (aka "interrupt group").  Using module parameters
to enable this mode wasn't an option either.  Long story short,
MQ_POLLING became obsolete, now it is just dead code, and no
one asked for it so far.
For the Tx queues, multi-queue support (more than 1 Tx queue
per CPU) could be revisited by adding tc MQPRIO support, but
again, one has to consider that there are only 2 interrupt lines.
So the NAPI poll routine would have to service multiple Tx rings.

Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoveth: check for NAPI instead of xdp_prog before xmit of XDP frame
Toke Høiland-Jørgensen [Fri, 16 Apr 2021 15:47:45 +0000 (17:47 +0200)]
veth: check for NAPI instead of xdp_prog before xmit of XDP frame

The recent patch that tied enabling of veth NAPI to the GRO flag also has
the nice side effect that a veth device can be the target of an
XDP_REDIRECT without an XDP program needing to be loaded on the peer
device. However, the patch adding this extra NAPI mode didn't actually
change the check in veth_xdp_xmit() to also look at the new NAPI pointer,
so let's fix that.

Fixes: 6788fa154546 ("veth: allow enabling NAPI even without XDP")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomld: fix suspicious RCU usage in __ipv6_dev_mc_dec()
Taehee Yoo [Fri, 16 Apr 2021 14:16:06 +0000 (14:16 +0000)]
mld: fix suspicious RCU usage in __ipv6_dev_mc_dec()

__ipv6_dev_mc_dec() internally uses sleepable functions so that caller
must not acquire atomic locks. But caller, which is addrconf_verify_rtnl()
acquires rcu_read_lock_bh().
So this warning occurs in the __ipv6_dev_mc_dec().

Test commands:
    ip netns add A
    ip link add veth0 type veth peer name veth1
    ip link set veth1 netns A
    ip link set veth0 up
    ip netns exec A ip link set veth1 up
    ip a a 2001:db8::1/64 dev veth0 valid_lft 2 preferred_lft 1

Splat looks like:
============================
WARNING: suspicious RCU usage
5.12.0-rc6+ #515 Not tainted
-----------------------------
kernel/sched/core.c:8294 Illegal context switch in RCU-bh read-side
critical section!

other info that might help us debug this:

rcu_scheduler_active = 2, debug_locks = 1
4 locks held by kworker/4:0/1997:
 #0: ffff88810bd72d48 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at:
process_one_work+0x761/0x1440
 #1: ffff888105c8fe00 ((addr_chk_work).work){+.+.}-{0:0}, at:
process_one_work+0x795/0x1440
 #2: ffffffffb9279fb0 (rtnl_mutex){+.+.}-{3:3}, at:
addrconf_verify_work+0xa/0x20
 #3: ffffffffb8e30860 (rcu_read_lock_bh){....}-{1:2}, at:
addrconf_verify_rtnl+0x23/0xc60

stack backtrace:
CPU: 4 PID: 1997 Comm: kworker/4:0 Not tainted 5.12.0-rc6+ #515
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
 dump_stack+0xa4/0xe5
 ___might_sleep+0x27d/0x2b0
 __mutex_lock+0xc8/0x13f0
 ? lock_downgrade+0x690/0x690
 ? __ipv6_dev_mc_dec+0x49/0x2a0
 ? mark_held_locks+0xb7/0x120
 ? mutex_lock_io_nested+0x1270/0x1270
 ? lockdep_hardirqs_on_prepare+0x12c/0x3e0
 ? _raw_spin_unlock_irqrestore+0x47/0x50
 ? trace_hardirqs_on+0x41/0x120
 ? __wake_up_common_lock+0xc9/0x100
 ? __wake_up_common+0x620/0x620
 ? memset+0x1f/0x40
 ? netlink_broadcast_filtered+0x2c4/0xa70
 ? __ipv6_dev_mc_dec+0x49/0x2a0
 __ipv6_dev_mc_dec+0x49/0x2a0
 ? netlink_broadcast_filtered+0x2f6/0xa70
 addrconf_leave_solict.part.64+0xad/0xf0
 ? addrconf_join_solict.part.63+0xf0/0xf0
 ? nlmsg_notify+0x63/0x1b0
 __ipv6_ifa_notify+0x22c/0x9c0
 ? inet6_fill_ifaddr+0xbe0/0xbe0
 ? lockdep_hardirqs_on_prepare+0x12c/0x3e0
 ? __local_bh_enable_ip+0xa5/0xf0
 ? ipv6_del_addr+0x347/0x870
 ipv6_del_addr+0x3b1/0x870
 ? addrconf_ifdown+0xfe0/0xfe0
 ? rcu_read_lock_any_held.part.27+0x20/0x20
 addrconf_verify_rtnl+0x8a9/0xc60
 addrconf_verify_work+0xf/0x20
 process_one_work+0x84c/0x1440

In order to avoid this problem, it uses rcu_read_unlock_bh() for
a short time. RCU is used for avoiding freeing
ifp(struct *inet6_ifaddr) while ifp is being used. But this will
not be released even if rcu_read_unlock_bh() is used.
Because before rcu_read_unlock_bh(), it uses in6_ifa_hold(ifp).
So this is safe.

Fixes: 63ed8de4be81 ("mld: add mc_lock for protecting per-interface mld data")
Suggested-by: Eric Dumazet <edumazet@google.com>
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge branch 'ipa-fw-names'
David S. Miller [Fri, 16 Apr 2021 22:38:32 +0000 (15:38 -0700)]
Merge branch 'ipa-fw-names'

Alex Elder says:

====================
net: ipa: allow different firmware names

Add the ability to define a "firmware-name" property in the IPA DT
node, specifying an alternate name to use for the firmware file.
Used only if the AP (Trust Zone) does early IPA initialization.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: ipa: optionally define firmware name via DT
Alex Elder [Fri, 16 Apr 2021 13:08:50 +0000 (08:08 -0500)]
net: ipa: optionally define firmware name via DT

IPA initialization includes loading some firmware.  This step is
done either by the modem or by the AP under Trust Zone.  If the
AP loads firmware, the name of the firmware file is currently
hard-coded ("ipa_fws.mdt").

Add the ability to specify the relative path of the firmware file to
use in a property in the Device Tree IPA node.  If the property is
not found (or if any other error occurs attempting to get it), fall
back to using a default relative path.

Use the "old" fixed name as the default.  Rename the symbol that
represents this default to emphasize its purpose.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agodt-bindings: net: qcom,ipa: add firmware-name property
Alex Elder [Fri, 16 Apr 2021 13:08:49 +0000 (08:08 -0500)]
dt-bindings: net: qcom,ipa: add firmware-name property

Add a new optional firmware-name property to the IPA DT node.  It
is used only if the modem is not doing early initialization (i.e.,
if the modem-init property is not present).  Its value is the name
of the firmware file to use; if it's not specified, a default name
("ipa_fws.mdt") is used.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agovirtio-net: page_to_skb() use build_skb when there's sufficient tailroom
Xuan Zhuo [Fri, 16 Apr 2021 09:16:15 +0000 (17:16 +0800)]
virtio-net: page_to_skb() use build_skb when there's sufficient tailroom

In page_to_skb(), if we have enough tailroom to save skb_shared_info, we
can use build_skb to create skb directly. No need to alloc for
additional space. And it can save a 'frags slot', which is very friendly
to GRO.

Here, if the payload of the received package is too small (less than
GOOD_COPY_LEN), we still choose to copy it directly to the space got by
napi_alloc_skb. So we can reuse these pages.

Testing Machine:
    The four queues of the network card are bound to the cpu1.

Test command:
    for ((i=0;i<5;++i)); do sockperf tp --ip 192.168.122.64 -m 1000 -t 150& done

The size of the udp package is 1000, so in the case of this patch, there
will always be enough tailroom to use build_skb. The sent udp packet
will be discarded because there is no port to receive it. The irqsoftd
of the machine is 100%, we observe the received quantity displayed by
sar -n DEV 1:

no build_skb:  956864.00 rxpck/s
build_skb:    1158465.00 rxpck/s

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: Add Qcom WWAN control driver
Loic Poulain [Fri, 16 Apr 2021 08:36:34 +0000 (10:36 +0200)]
net: Add Qcom WWAN control driver

The MHI WWWAN control driver allows MHI QCOM-based modems to expose
different modem control protocols/ports via the WWAN framework, so that
userspace modem tools or daemon (e.g. ModemManager) can control WWAN
config and state (APN config, SMS, provider selection...). A QCOM-based
modem can expose one or several of the following protocols:
- AT: Well known AT commands interactive protocol (microcom, minicom...)
- MBIM: Mobile Broadband Interface Model (libmbim, mbimcli)
- QMI: QCOM MSM/Modem Interface (libqmi, qmicli)
- QCDM: QCOM Modem diagnostic interface (libqcdm)
- FIREHOSE: XML-based protocol for Modem firmware management
        (qmi-firmware-update)

Note that this patch is mostly a rework of the earlier MHI UCI
tentative that was a generic interface for accessing MHI bus from
userspace. As suggested, this new version is WWAN specific and is
dedicated to only expose channels used for controlling a modem, and
for which related opensource userpace support exist.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: Add a WWAN subsystem
Loic Poulain [Fri, 16 Apr 2021 08:36:33 +0000 (10:36 +0200)]
net: Add a WWAN subsystem

This change introduces initial support for a WWAN framework. Given the
complexity and heterogeneity of existing WWAN hardwares and interfaces,
there is no strict definition of what a WWAN device is and how it should
be represented. It's often a collection of multiple devices that perform
the global WWAN feature (netdev, tty, chardev, etc).

One usual way to expose modem controls and configuration is via high
level protocols such as the well known AT command protocol, MBIM or
QMI. The USB modems started to expose them as character devices, and
user daemons such as ModemManager learnt to use them.

This initial version adds the concept of WWAN port, which is a logical
pipe to a modem control protocol. The protocols are rawly exposed to
user via character device, allowing straigthforward support in existing
tools (ModemManager, ofono...). The WWAN core takes care of the generic
part, including character device management, and relies on port driver
operations to receive/submit protocol data.

Since the different devices exposing protocols for a same WWAN hardware
do not necessarily know about each others (e.g. two different USB
interfaces, PCI/MHI channel devices...) and can be created/removed in
different orders, the WWAN core ensures that all WAN ports contributing
to the 'whole' WWAN feature are grouped under the same virtual WWAN
device, relying on the provided parent device (e.g. mhi controller,
USB device). It's a 'trick' I copied from Johannes's earlier WWAN
subsystem proposal.

This initial version is purposely minimalist, it's essentially moving
the generic part of the previously proposed mhi_wwan_ctrl driver inside
a common WWAN framework, but the implementation is open and flexible
enough to allow extension for further drivers.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: mvpp2: Add parsing support for different IPv4 IHL values
Stefan Chulski [Fri, 16 Apr 2021 08:15:17 +0000 (11:15 +0300)]
net: mvpp2: Add parsing support for different IPv4 IHL values

Add parser entries for different IPv4 IHL values.
Each entry will set the L4 header offset according to the IPv4 IHL field.
L3 header offset will set during the parsing of the IPv4 protocol.

Because of missed parser support for IP header length > 20, RX IPv4 checksum HW offload fails
and skb->ip_summed set to CHECKSUM_NONE(checksum done by Network stack).
This patch adds RX IPv4 checksum HW offload capability for frames with IP header length > 20.

v1 --> v2
- Improve commit message.

Suggested-by: Dana Vardi <danat@marvell.com>
Signed-off-by: Stefan Chulski <stefanc@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge branch 'r8152--new-chips'
David S. Miller [Fri, 16 Apr 2021 22:28:32 +0000 (15:28 -0700)]
Merge branch 'r8152--new-chips'

Hayes Wang says:

====================
r8152: support new chips

Support new RTL8153 and RTL8156 series.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agor8152: search the configuration of vendor mode
Hayes Wang [Fri, 16 Apr 2021 08:04:37 +0000 (16:04 +0800)]
r8152: search the configuration of vendor mode

The vendor mode is not always at config #1, so it is necessary to
set the correct configuration number.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agor8152: support PHY firmware for RTL8156 series
Hayes Wang [Fri, 16 Apr 2021 08:04:36 +0000 (16:04 +0800)]
r8152: support PHY firmware for RTL8156 series

Support new firmware type and method for RTL8156 series.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agor8152: support new chips
Hayes Wang [Fri, 16 Apr 2021 08:04:35 +0000 (16:04 +0800)]
r8152: support new chips

Support RTL8153C, RTL8153D, RTL8156A, and RTL8156B. The RTL8156A
and RTL8156B are the 2.5G ethernet.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agor8152: add help function to change mtu
Hayes Wang [Fri, 16 Apr 2021 08:04:34 +0000 (16:04 +0800)]
r8152: add help function to change mtu

The different chips may have different requests when changing mtu.
Therefore, add a new help function of rtl_ops to change mtu. Besides,
reset the tx/rx after changing mtu.

Additionally, add mtu_to_size() and size_to_mtu() macros to simplify
the code.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agor8152: adjust rtl8152_check_firmware function
Hayes Wang [Fri, 16 Apr 2021 08:04:33 +0000 (16:04 +0800)]
r8152: adjust rtl8152_check_firmware function

Use bits operations to record and check the firmware.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agor8152: set inter fram gap time depending on speed
Hayes Wang [Fri, 16 Apr 2021 08:04:32 +0000 (16:04 +0800)]
r8152: set inter fram gap time depending on speed

Set the maximum inter frame gap time (144ns) for speed 10M/half and
100M/half. It improves the performance for those speeds. And, there
is no effect for the other speeds.

For 10M/half and 100M/half, the fast inter frame gap time let the
device couldn't use the feature of the aggregation effectively,
because the transfer would be completed fastly. Therefore, use the
maximum value to improve the effect of the aggregation. However, you
may not feel the improvement for fast CPUs, because they compensate
for the effect of the aggregation.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMAINTAINERS: update my email
Lijun Pan [Fri, 16 Apr 2021 04:18:13 +0000 (23:18 -0500)]
MAINTAINERS: update my email

Update my email and change myself to Reviewer.

Signed-off-by: Lijun Pan <lijunp213@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: ethernet: mediatek: ppe: fix busy wait loop
Ilya Lipnitskiy [Fri, 16 Apr 2021 00:37:48 +0000 (17:37 -0700)]
net: ethernet: mediatek: ppe: fix busy wait loop

The intention is for the loop to timeout if the body does not succeed.
The current logic calls time_is_before_jiffies(timeout) which is false
until after the timeout, so the loop body never executes.

Fix by using readl_poll_timeout as a more standard and less error-prone
solution.

Fixes: ba37b7caf1ed ("net: ethernet: mtk_eth_soc: add support for initializing the PPE")
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Cc: Felix Fietkau <nbd@nbd.name>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge branch 'mptcp-socket-options'
David S. Miller [Fri, 16 Apr 2021 22:23:10 +0000 (15:23 -0700)]
Merge branch 'mptcp-socket-options'

Mat Martineau says:

====================
mptcp: Improve socket option handling

MPTCP sockets have previously had limited socket option support. The
architecture of MPTCP sockets (one userspace-facing MPTCP socket that
manages one or more in-kernel TCP subflow sockets) adds complexity for
passing options through to lower levels. This patch set adds MPTCP
support for socket options commonly used with TCP.

Patch 1 reverts an interim socket option fix (a socket option blocklist)
that was merged in the net tree for v5.12.

Patch 2 moves the socket option code to a separate file, with no
functional changes.

Patch 3 adds an allowlist for socket options that are known to function
with MPTCP. Later patches in this set add more allowed options.

Patches 4 and 5 add infrastructure for syncing MPTCP-level options with
the TCP subflows.

Patches 6-12 add support for specific socket options.

Patch 13 adds a socket option self test.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoselftests: mptcp: add packet mark test case
Florian Westphal [Thu, 15 Apr 2021 23:45:02 +0000 (16:45 -0700)]
selftests: mptcp: add packet mark test case

Extend mptcp_connect tool with SO_MARK support (-M <value>) and
add a test case that checks that the packet mark gets copied to all
subflows.

This is done by only allowing packets with either skb->mark 1 or 2
via iptables.

DROP rule packet counter is checked; if its not zero, print an error
message and fail the test case.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: sockopt: add TCP_CONGESTION and TCP_INFO
Florian Westphal [Thu, 15 Apr 2021 23:45:01 +0000 (16:45 -0700)]
mptcp: sockopt: add TCP_CONGESTION and TCP_INFO

TCP_CONGESTION is set for all subflows.
The mptcp socket gains icsk_ca_ops too so it can be used to keep the
authoritative state that should be set on new/future subflows.

TCP_INFO will return first subflow only.
The out-of-tree kernel has a MPTCP_INFO getsockopt, this could be added
later on.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: setsockopt: SO_DEBUG and no-op options
Florian Westphal [Thu, 15 Apr 2021 23:45:00 +0000 (16:45 -0700)]
mptcp: setsockopt: SO_DEBUG and no-op options

Handle SO_DEBUG and set it on all subflows.
Ignore those values not implemented on TCP sockets.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: setsockopt: add SO_INCOMING_CPU
Florian Westphal [Thu, 15 Apr 2021 23:44:59 +0000 (16:44 -0700)]
mptcp: setsockopt: add SO_INCOMING_CPU

Replicate to all subflows.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: setsockopt: add SO_MARK support
Florian Westphal [Thu, 15 Apr 2021 23:44:58 +0000 (16:44 -0700)]
mptcp: setsockopt: add SO_MARK support

Value is synced to all subflows.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: setsockopt: support SO_LINGER
Florian Westphal [Thu, 15 Apr 2021 23:44:57 +0000 (16:44 -0700)]
mptcp: setsockopt: support SO_LINGER

Similar to PRIORITY/KEEPALIVE: needs to be mirrored to all subflows.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: setsockopt: handle receive/send buffer and device bind
Florian Westphal [Thu, 15 Apr 2021 23:44:56 +0000 (16:44 -0700)]
mptcp: setsockopt: handle receive/send buffer and device bind

Similar to previous patch: needs to be mirrored to all subflows.

Device bind is simpler: it is only done on the initial (listener) sk.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: setsockopt: handle SO_KEEPALIVE and SO_PRIORITY
Florian Westphal [Thu, 15 Apr 2021 23:44:55 +0000 (16:44 -0700)]
mptcp: setsockopt: handle SO_KEEPALIVE and SO_PRIORITY

start with something simple: both take an integer value, both
need to be mirrored to all subflows.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: tag sequence_seq with socket state
Florian Westphal [Thu, 15 Apr 2021 23:44:54 +0000 (16:44 -0700)]
mptcp: tag sequence_seq with socket state

Paolo Abeni suggested to avoid re-syncing new subflows because
they inherit options from listener. In case options were set on
listener but are not set on mptcp-socket there is no need to
do any synchronisation for new subflows.

This change sets sockopt_seq of new mptcp sockets to the seq of
the mptcp listener sock.

Subflow sequence is set to the embedded tcp listener sk.
Add a comment explaing why sk_state is involved in sockopt_seq
generation.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: add skeleton to sync msk socket options to subflows
Florian Westphal [Thu, 15 Apr 2021 23:44:53 +0000 (16:44 -0700)]
mptcp: add skeleton to sync msk socket options to subflows

Handle following cases:
1. setsockopt is called with multiple subflows.
   Change might have to be mirrored to all of them.
   This is done directly in process context/setsockopt call.
2. Outgoing subflow is created after one or several setsockopt()
   calls have been made.  Old setsockopt changes should be
   synced to the new socket.
3. Incoming subflow, after setsockopt call(s).

Cases 2 and 3 are handled right after the join list is spliced to the conn
list.

Not all sockopt values can be just be copied by value, some require
helper calls.  Those can acquire socket lock (which can sleep).

If the join->conn list splicing is done from preemptible context,
synchronization can be done right away, otherwise its deferred to work
queue.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: only admit explicitly supported sockopt
Paolo Abeni [Thu, 15 Apr 2021 23:44:52 +0000 (16:44 -0700)]
mptcp: only admit explicitly supported sockopt

Unrolling mcast state at msk dismantel time is bug prone, as
syzkaller reported:

======================================================
WARNING: possible circular locking dependency detected
5.11.0-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor905/8822 is trying to acquire lock:
ffffffff8d678fe8 (rtnl_mutex){+.+.}-{3:3}, at: ipv6_sock_mc_close+0xd7/0x110 net/ipv6/mcast.c:323

but task is already holding lock:
ffff888024390120 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1600 [inline]
ffff888024390120 (sk_lock-AF_INET6){+.+.}-{0:0}, at: mptcp6_release+0x57/0x130 net/mptcp/protocol.c:3507

which lock already depends on the new lock.

Instead we can simply forbid any mcast-related setsockopt.
Let's do the same with all other non supported sockopts.

Fixes: 717e79c867ca5 ("mptcp: Add setsockopt()/getsockopt() socket operations")
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: move sockopt function into a new file
Paolo Abeni [Thu, 15 Apr 2021 23:44:51 +0000 (16:44 -0700)]
mptcp: move sockopt function into a new file

The MPTCP sockopt implementation is going to be much
more big and complex soon. Let's move it to a different
source file.

No functional change intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomptcp: revert "mptcp: forbit mcast-related sockopt on MPTCP sockets"
Matthieu Baerts [Thu, 15 Apr 2021 23:44:50 +0000 (16:44 -0700)]
mptcp: revert "mptcp: forbit mcast-related sockopt on MPTCP sockets"

This change reverts commit 86581852d771 ("mptcp: forbit mcast-related sockopt on MPTCP sockets").

As announced in the cover letter of the mentioned patch above, the
following commits introduce a larger MPTCP sockopt implementation
refactor.

This time, we switch from a blocklist to an allowlist. This is safer for
the future where new sockoptions could be added while not being fully
supported with MPTCP sockets and thus causing unstabilities.

Suggested-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoatl1c: move tx cleanup processing out of interrupt
Gatis Peisenieks [Wed, 14 Apr 2021 19:09:20 +0000 (22:09 +0300)]
atl1c: move tx cleanup processing out of interrupt

Tx queue cleanup happens in interrupt handler on same core as rx queue
processing. Both can take considerable amount of processing in high
packet-per-second scenarios.

Sending big amounts of packets can stall the rx processing which is
unfair and also can lead to out-of-memory condition since
__dev_kfree_skb_irq queues the skbs for later kfree in softirq which
is not allowed to happen with heavy load in interrupt handler.

This puts tx cleanup in its own napi and enables threaded napi to
allow the rx/tx queue processing to happen on different cores.

The ability to sustain equal amounts of tx/rx traffic increased:
from 280Kpps to 1130Kpps on Threadripper 3960X with upcoming
Mikrotik 10/25G NIC,
from 520Kpps to 850Kpps on Intel i3-3320 with Mikrotik RB44Ge adapter.

Signed-off-by: Gatis Peisenieks <gatis@mikrotik.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge branch 'BR_FDB_LOCAL'
David S. Miller [Fri, 16 Apr 2021 22:15:45 +0000 (15:15 -0700)]
Merge branch 'BR_FDB_LOCAL'

Vladimir Oltean says:

====================
Pass the BR_FDB_LOCAL information to switchdev drivers

Bridge FDB entries with the is_local flag are entries which are
terminated locally and not forwarded. Switchdev drivers might want to be
notified of these addresses so they can trap them. If they don't program
these entries to hardware, there is no guarantee that they will do the
right thing with these entries, and they won't be, let's say, flooded.

Ideally none of the switchdev drivers should ignore these entries, but
having access to the is_local bit is the bare minimum change that should
be done in the bridge layer, before this is even possible.

These 2 changes are extracted from the larger "RX filtering in DSA"
series:
https://patchwork.kernel.org/project/netdevbpf/patch/20210224114350.2791260-8-olteanv@gmail.com/
https://patchwork.kernel.org/project/netdevbpf/patch/20210224114350.2791260-9-olteanv@gmail.com/
and submitted separately, because they touch all switchdev drivers,
while the rest is mostly specific to DSA.

This change is not a functional one, in the sense that everybody still
ignores the local FDB entries, but this will be changed by further
patches at least for DSA.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: bridge: switchdev: include local flag in FDB notifications
Vladimir Oltean [Wed, 14 Apr 2021 16:52:56 +0000 (19:52 +0300)]
net: bridge: switchdev: include local flag in FDB notifications

As explained in bugfix commit 6ab4c3117aec ("net: bridge: don't notify
switchdev for local FDB addresses") as well as in this discussion:
https://lore.kernel.org/netdev/20210117193009.io3nungdwuzmo5f7@skbuf/

the switchdev notifiers for FDB entries managed to have a zero-day bug,
which was that drivers would not know what to do with local FDB entries,
because they were not told that they are local. The bug fix was to
simply not notify them of those addresses.

Let us now add the 'is_local' bit to bridge FDB entries, and make all
drivers ignore these entries by their own choice.

Co-developed-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet: bridge: switchdev: refactor br_switchdev_fdb_notify
Tobias Waldekranz [Wed, 14 Apr 2021 16:52:55 +0000 (19:52 +0300)]
net: bridge: switchdev: refactor br_switchdev_fdb_notify

Instead of having to add more and more arguments to
br_switchdev_fdb_call_notifiers, get rid of it and build the info
struct directly in br_switchdev_fdb_notify.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agobpf: Update selftests to reflect new error states
Daniel Borkmann [Wed, 24 Mar 2021 13:52:31 +0000 (14:52 +0100)]
bpf: Update selftests to reflect new error states

Update various selftest error messages:

 * The 'Rx tried to sub from different maps, paths, or prohibited types'
   is reworked into more specific/differentiated error messages for better
   guidance.

 * The change into 'value -4294967168 makes map_value pointer be out of
   bounds' is due to moving the mixed bounds check into the speculation
   handling and thus occuring slightly later than above mentioned sanity
   check.

 * The change into 'math between map_value pointer and register with
   unbounded min value' is similarly due to register sanity check coming
   before the mixed bounds check.

 * The case of 'map access: known scalar += value_ptr from different maps'
   now loads fine given masks are the same from the different paths (despite
   max map value size being different).

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
3 years agobpf: Tighten speculative pointer arithmetic mask
Daniel Borkmann [Wed, 24 Mar 2021 09:38:26 +0000 (10:38 +0100)]
bpf: Tighten speculative pointer arithmetic mask

This work tightens the offset mask we use for unprivileged pointer arithmetic
in order to mitigate a corner case reported by Piotr and Benedict where in
the speculative domain it is possible to advance, for example, the map value
pointer by up to value_size-1 out-of-bounds in order to leak kernel memory
via side-channel to user space.

Before this change, the computed ptr_limit for retrieve_ptr_limit() helper
represents largest valid distance when moving pointer to the right or left
which is then fed as aux->alu_limit to generate masking instructions against
the offset register. After the change, the derived aux->alu_limit represents
the largest potential value of the offset register which we mask against which
is just a narrower subset of the former limit.

For minimal complexity, we call sanitize_ptr_alu() from 2 observation points
in adjust_ptr_min_max_vals(), that is, before and after the simulated alu
operation. In the first step, we retieve the alu_state and alu_limit before
the operation as well as we branch-off a verifier path and push it to the
verification stack as we did before which checks the dst_reg under truncation,
in other words, when the speculative domain would attempt to move the pointer
out-of-bounds.

In the second step, we retrieve the new alu_limit and calculate the absolute
distance between both. Moreover, we commit the alu_state and final alu_limit
via update_alu_sanitation_state() to the env's instruction aux data, and bail
out from there if there is a mismatch due to coming from different verification
paths with different states.

Reported-by: Piotr Krysiuk <piotras@gmail.com>
Reported-by: Benedict Schlueter <benedict.schlueter@rub.de>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Benedict Schlueter <benedict.schlueter@rub.de>
3 years agobpf: Move sanitize_val_alu out of op switch
Daniel Borkmann [Wed, 24 Mar 2021 10:25:39 +0000 (11:25 +0100)]
bpf: Move sanitize_val_alu out of op switch

Add a small sanitize_needed() helper function and move sanitize_val_alu()
out of the main opcode switch. In upcoming work, we'll move sanitize_ptr_alu()
as well out of its opcode switch so this helps to streamline both.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
3 years agobpf: Refactor and streamline bounds check into helper
Daniel Borkmann [Tue, 23 Mar 2021 14:05:48 +0000 (15:05 +0100)]
bpf: Refactor and streamline bounds check into helper

Move the bounds check in adjust_ptr_min_max_vals() into a small helper named
sanitize_check_bounds() in order to simplify the former a bit.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
3 years agobpf: Improve verifier error messages for users
Daniel Borkmann [Tue, 23 Mar 2021 08:30:01 +0000 (09:30 +0100)]
bpf: Improve verifier error messages for users

Consolidate all error handling and provide more user-friendly error messages
from sanitize_ptr_alu() and sanitize_val_alu().

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
3 years agobpf: Rework ptr_limit into alu_limit and add common error path
Daniel Borkmann [Tue, 23 Mar 2021 08:04:10 +0000 (09:04 +0100)]
bpf: Rework ptr_limit into alu_limit and add common error path

Small refactor with no semantic changes in order to consolidate the max
ptr_limit boundary check.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>