Pull io_uring fixes from Jens Axboe:

 - Add missing header file to the MAINTAINERS entry for io_uring (Ammar)

 - liburing and the kernel ship the same io_uring.h header, but one
   change we've had for a long time only in liburing is to ensure it's
   C++ safe. Add extern C around it, so we can more easily sync them in
   the future (Ammar)

 - Fix an off-by-one in the sync cancel added in this merge window (me)

 - Error handling fix for passthrough (Kanchan)

 - Fix for address saving for async execution for the zc tx support
   (Pavel)

 - Fix ordering for TCP zc notifications, so we always have them ordered
   correctly between "data was sent" and "data was acked". This isn't
   strictly needed with the notification slots, but we've been pondering
   disabling the slot support for 6.0 - and if we do, then we do require
   the ordering to be sane. Regardless of that, it's the sane thing to
   do in terms of API (Pavel)

 - Minor cleanup for indentation and lockdep annotation (Pavel)

* tag 'io_uring-6.0-2022-08-26' of git://git.kernel.dk/linux-block:
  io_uring/net: save address for sendzc async execution
  io_uring: conditional ->async_data allocation
  io_uring/notif: order notif vs send CQEs
  io_uring/net: fix indentation
  io_uring/net: fix zc send link failing
  io_uring/net: fix must_hold annotation
  io_uring: fix submission-failure handling for uring-cmd
  io_uring: fix off-by-one in sync cancelation file check
  io_uring: uapi: Add `extern "C"` in io_uring.h for liburing
  MAINTAINERS: Add `include/linux/io_uring_types.h`

Pull SCSI fixes from James Bottomley:
 "Ten fixes.

  Of the three core changes, the two large ones are a complete reversion
  of the async rework and an ALUA timing rework (the latter shouldn't
  affect non-ALUA paths).

  The remaining patches are all small and all but one in drivers"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: sd: Revert "Rework asynchronous resume support"
  scsi: core: Fix passthrough retry counter handling
  scsi: ufs: core: Reduce the power mode change timeout
  scsi: storvsc: Remove WQ_MEM_RECLAIM from storvsc_error_wq
  scsi: ufs: host: ufs-exynos: Make fsd_ufs_drvs static
  scsi: megaraid_sas: Remove unnecessary kfree()
  scsi: megaraid_sas: Fix double kfree()
  scsi: ufs: core: Enable link lost interrupt
  scsi: core: Allow the ALUA transitioning state enough time
  scsi: qla2xxx: Disable ATIO interrupt coalesce for quad port ISP27XX

There are several places in the kernel where wait_on_bit is not followed
by a memory barrier (for example, in drivers/md/dm-bufio.c:new_read).

On architectures with weak memory ordering, it may happen that memory
accesses that follow wait_on_bit are reordered before wait_on_bit and
they may return invalid data.

Fix this class of bugs by introducing a new function "test_bit_acquire"
that works like test_bit, but has acquire memory ordering semantics.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Will Deacon <will@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull networking fixes from Jakub Kicinski:
 "Including fixes from ipsec and netfilter (with one broken Fixes tag).

  Current release - new code bugs:

   - dsa: don't dereference NULL extack in dsa_slave_changeupper()

   - dpaa: fix <1G ethernet on LS1046ARDB

   - neigh: don't call kfree_skb() under spin_lock_irqsave()

  Previous releases - regressions:

   - r8152: fix the RX FIFO settings when suspending

   - dsa: microchip: keep compatibility with device tree blobs with no
     phy-mode

   - Revert "net: macsec: update SCI upon MAC address change."

   - Revert "xfrm: update SA curlft.use_time", comply with RFC 2367

  Previous releases - always broken:

   - netfilter: conntrack: work around exceeded TCP receive window

   - ipsec: fix a null pointer dereference of dst->dev on a metadata dst
     in xfrm_lookup_with_ifid

   - moxa: get rid of asymmetry in DMA mapping/unmapping

   - dsa: microchip: make learning configurable and keep it off while
     standalone

   - ice: xsk: prohibit usage of non-balanced queue id

   - rxrpc: fix locking in rxrpc's sendmsg

  Misc:

   - another chunk of sysctl data race silencing"

* tag 'net-6.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (87 commits)
  net: lantiq_xrx200: restore buffer if memory allocation failed
  net: lantiq_xrx200: fix lock under memory pressure
  net: lantiq_xrx200: confirm skb is allocated before using
  net: stmmac: work around sporadic tx issue on link-up
  ionic: VF initial random MAC address if no assigned mac
  ionic: fix up issues with handling EAGAIN on FW cmds
  ionic: clear broken state on generation change
  rxrpc: Fix locking in rxrpc's sendmsg
  net: ethernet: mtk_eth_soc: fix hw hash reporting for MTK_NETSYS_V2
  MAINTAINERS: rectify file entry in BONDING DRIVER
  i40e: Fix incorrect address type for IPv6 flow rules
  ixgbe: stop resetting SYSTIME in ixgbe_ptp_start_cyclecounter
  net: Fix a data-race around sysctl_somaxconn.
  net: Fix a data-race around netdev_unregister_timeout_secs.
  net: Fix a data-race around gro_normal_batch.
  net: Fix data-races around sysctl_devconf_inherit_init_net.
  net: Fix data-races around sysctl_fb_tunnels_only_for_init_net.
  net: Fix a data-race around netdev_budget_usecs.
  net: Fix data-races around sysctl_max_skb_frags.
  net: Fix a data-race around netdev_budget.
  ...

Aleksander Jan Bajkowski says:

====================
net: lantiq_xrx200: fix errors under memory pressure

This series fixes issues that can occur in the driver under memory pressure.
Situations when the system cannot allocate memory are rare, so the mentioned
bugs have been fixed recently. The patches have been tested on a BT Home
router with the Lantiq xRX200 chipset.

Changelog:
  v3: - removed netdev_err() log from the first patch
  v2:
   - the second patch has been changed, so that under memory pressure situation
     the driver will not receive packets indefinitely regardless of the NAPI budget,
   - the third patch has been added.
====================

Link: https://lore.kernel.org/r/20220824215408.4695-1-olek2@wp.plSigned-off-by: Jakub Kicinski <kuba@kernel.org>

In a situation where memory allocation fails, an invalid buffer address
is stored. When this descriptor is used again, the system panics in the
build_skb() function when accessing memory.

Fixes: 7ea6cd16 ("lantiq: net: fix duplicated skb in rx descriptor ring")
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

When the xrx200_hw_receive() function returns -ENOMEM, the NAPI poll
function immediately returns an error.
This is incorrect for two reasons:
* the function terminates without enabling interrupts or scheduling NAPI,
* the error code (-ENOMEM) is returned instead of the number of received
packets.

After the first memory allocation failure occurs, packet reception is
locked due to disabled interrupts from DMA..

Fixes: fe1a5642 ("net: lantiq: Add Lantiq / Intel VRX200 Ethernet driver")
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

xrx200_hw_receive() assumes build_skb() always works and goes straight
to skb_reserve(). However, build_skb() can fail under memory pressure.

Add a check in case build_skb() failed to allocate and return NULL.

Fixes: e0155935 ("net: lantiq_xrx200: convert to build_skb")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This is a follow-up to the discussion in [0]. It seems to me that
at least the IP version used on Amlogic SoC's sometimes has a problem
if register MAC_CTRL_REG is written whilst the chip is still processing
a previous write. But that's just a guess.
Adding a delay between two writes to this register helps, but we can
also simply omit the offending second write. This patch uses the second
approach and is based on a suggestion from Qi Duan.
Benefit of this approach is that we can save few register writes, also
on not affected chip versions.

[0] https://www.spinics.net/lists/netdev/msg831526.html

Fixes: bfab27a1 ("stmmac: add the experimental PCI support")
Suggested-by: Qi Duan <qi.duan@amlogic.com>
Suggested-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/e99857ce-bd90-5093-ca8c-8cd480b5a0a2@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2022-08-24 (ixgbe, i40e)

This series contains updates to ixgbe and i40e drivers.

Jake stops incorrect resetting of SYSTIME registers when starting
cyclecounter for ixgbe.

Sylwester corrects a check on source IP address when validating destination
for i40e.

* '10GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
  i40e: Fix incorrect address type for IPv6 flow rules
  ixgbe: stop resetting SYSTIME in ixgbe_ptp_start_cyclecounter
====================

Link: https://lore.kernel.org/r/20220824193748.874343-1-anthony.l.nguyen@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Shannon Nelson says:

====================
ionic: bug fixes

These are a couple of maintenance bug fixes for the Pensando ionic
networking driver.

Mohamed takes care of a "plays well with others" issue where the
VF spec is a bit vague on VF mac addresses, but certain customers
have come to expect behavior based on other vendor drivers.

Shannon addresses a couple of corner cases seen in internal
stress testing.
====================

Link: https://lore.kernel.org/r/20220824165051.6185-1-snelson@pensando.ioSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Assign a random mac address to the VF interface station
address if it boots with a zero mac address in order to match
similar behavior seen in other VF drivers.  Handle the errors
where the older firmware does not allow the VF to set its own
station address.

Newer firmware will allow the VF to set the station mac address
if it hasn't already been set administratively through the PF.
Setting it will also be allowed if the VF has trust.

Fixes: fbb39807 ("ionic: support sr-iov operations")
Signed-off-by: R Mohamed Shah <mohamed@pensando.io>
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In looping on FW update tests we occasionally see the
FW_ACTIVATE_STATUS command fail while it is in its EAGAIN loop
waiting for the FW activate step to finsh inside the FW.  The
firmware is complaining that the done bit is set when a new
dev_cmd is going to be processed.

Doing a clean on the cmd registers and doorbell before exiting
the wait-for-done and cleaning the done bit before the sleep
prevents this from occurring.

Fixes: fbfb8031 ("ionic: Add hardware init and device commands")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

There is a case found in heavy testing where a link flap happens just
before a firmware Recovery event and the driver gets stuck in the
BROKEN state.  This comes from the driver getting interrupted by a FW
generation change when coming back up from the link flap, and the call
to ionic_start_queues() in ionic_link_status_check() fails.  This can be
addressed by having the fw_up code clear the BROKEN bit if seen, rather
than waiting for a user to manually force the interface down and then
back up.

Fixes: 9e8eaf84 ("ionic: stop watchdog when in broken state")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Fix three bugs in the rxrpc's sendmsg implementation:

 (1) rxrpc_new_client_call() should release the socket lock when returning
     an error from rxrpc_get_call_slot().

 (2) rxrpc_wait_for_tx_window_intr() will return without the call mutex
     held in the event that we're interrupted by a signal whilst waiting
     for tx space on the socket or relocking the call mutex afterwards.

     Fix this by: (a) moving the unlock/lock of the call mutex up to
     rxrpc_send_data() such that the lock is not held around all of
     rxrpc_wait_for_tx_window*() and (b) indicating to higher callers
     whether we're return with the lock dropped.  Note that this means
     recvmsg() will not block on this call whilst we're waiting.

 (3) After dropping and regaining the call mutex, rxrpc_send_data() needs
     to go and recheck the state of the tx_pending buffer and the
     tx_total_len check in case we raced with another sendmsg() on the same
     call.

Thinking on this some more, it might make sense to have different locks for
sendmsg() and recvmsg().  There's probably no need to make recvmsg() wait
for sendmsg().  It does mean that recvmsg() can return MSG_EOR indicating
that a call is dead before a sendmsg() to that call returns - but that can
currently happen anyway.

Without fix (2), something like the following can be induced:

	WARNING: bad unlock balance detected!
	5.16.0-rc6-syzkaller #0 Not tainted
	-------------------------------------
	syz-executor011/3597 is trying to release lock (&call->user_mutex) at:
	[<ffffffff885163a3>] rxrpc_do_sendmsg+0xc13/0x1350 net/rxrpc/sendmsg.c:748
	but there are no more locks to release!

	other info that might help us debug this:
	no locks held by syz-executor011/3597.
	...
	Call Trace:
	 <TASK>
	 __dump_stack lib/dump_stack.c:88 [inline]
	 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
	 print_unlock_imbalance_bug include/trace/events/lock.h:58 [inline]
	 __lock_release kernel/locking/lockdep.c:5306 [inline]
	 lock_release.cold+0x49/0x4e kernel/locking/lockdep.c:5657
	 __mutex_unlock_slowpath+0x99/0x5e0 kernel/locking/mutex.c:900
	 rxrpc_do_sendmsg+0xc13/0x1350 net/rxrpc/sendmsg.c:748
	 rxrpc_sendmsg+0x420/0x630 net/rxrpc/af_rxrpc.c:561
	 sock_sendmsg_nosec net/socket.c:704 [inline]
	 sock_sendmsg+0xcf/0x120 net/socket.c:724
	 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
	 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
	 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
	 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
	 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
	 entry_SYSCALL_64_after_hwframe+0x44/0xae

[Thanks to Hawkins Jiawei and Khalid Masum for their attempts to fix this]

Fixes: bc5e3a54 ("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals")
Reported-by: syzbot+7f0483225d0c94cb3441@syzkaller.appspotmail.com
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Marc Dionne <marc.dionne@auristor.com>
Tested-by: syzbot+7f0483225d0c94cb3441@syzkaller.appspotmail.com
cc: Hawkins Jiawei <yin31149@gmail.com>
cc: Khalid Masum <khalid.masum.92@gmail.com>
cc: Dan Carpenter <dan.carpenter@oracle.com>
cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/r/166135894583.600315.7170979436768124075.stgit@warthog.procyon.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Pull another cgroup fix from Tejun Heo:
 "Commit 4f7e7236 ("cgroup: Fix threadgroup_rwsem <->
  cpus_read_lock() deadlock") required the cgroup
  core to grab cpus_read_lock() before invoking ->attach().

  Unfortunately, it missed adding cpus_read_lock() in
  cgroup_attach_task_all(). Fix it"

* tag 'cgroup-for-6.0-rc2-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all()

syzbot is hitting percpu_rwsem_assert_held(&cpu_hotplug_lock) warning at
cpuset_attach() [1], for commit 4f7e7236 ("cgroup: Fix
threadgroup_rwsem <-> cpus_read_lock() deadlock") missed that
cpuset_attach() is also called from cgroup_attach_task_all().
Add cpus_read_lock() like what cgroup_procs_write_start() does.

Link: https://syzkaller.appspot.com/bug?extid=29d3a3b4d86c8136ad9e [1]
Reported-by: syzbot <syzbot+29d3a3b4d86c8136ad9e@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 4f7e7236 ("cgroup: Fix threadgroup_rwsem <-> cpus_read_lock() deadlock")
Signed-off-by: Tejun Heo <tj@kernel.org>

We usually copy all bits that a request needs from the userspace for
async execution, so the userspace can keep them on the stack. However,
send zerocopy violates this pattern for addresses and may reloads it
e.g. from io-wq. Save the address if any in ->async_data as usual.
Reported-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d7512d7aa9abcd36e9afe1a4d292a24cb2d157e5.1661342812.git.asml.silence@gmail.com
[axboe: fold in incremental fix]
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Properly report hw rx hash for mt7986 chipset accroding to the new dma
descriptor layout.

Fixes: 197c9e9b ("net: ethernet: mtk_eth_soc: introduce support for mt7986 chipset")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/091394ea4e705fbb35f828011d98d0ba33808f69.1661257293.git.lorenzo@kernel.orgSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

1) Fix crash with malformed ebtables blob which do not provide all
   entry points, from Florian Westphal.

2) Fix possible TCP connection clogging up with default 5-days
   timeout in conntrack, from Florian.

3) Fix crash in nf_tables tproxy with unsupported chains, also from Florian.

4) Do not allow to update implicit chains.

5) Make table handle allocation per-netns to fix data race.

6) Do not truncated payload length and offset, and checksum offset.
   Instead report EINVAl.

7) Enable chain stats update via static key iff no error occurs.

8) Restrict osf expression to ip, ip6 and inet families.

9) Restrict tunnel expression to netdev family.

10) Fix crash when trying to bind again an already bound chain.

11) Flowtable garbage collector might leave behind pending work to
    delete entries. This patch comes with a previous preparation patch
    as dependency.

12) Allow net.netfilter.nf_conntrack_frag6_high_thresh to be lowered,
    from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  netfilter: nf_defrag_ipv6: allow nf_conntrack_frag6_high_thresh increases
  netfilter: flowtable: fix stuck flows on cleanup due to pending work
  netfilter: flowtable: add function to invoke garbage collection immediately
  netfilter: nf_tables: disallow binding to already bound chain
  netfilter: nft_tunnel: restrict it to netdev family
  netfilter: nft_osf: restrict osf to ipv4, ipv6 and inet families
  netfilter: nf_tables: do not leave chain stats enabled on error
  netfilter: nft_payload: do not truncate csum_offset and csum_type
  netfilter: nft_payload: report ERANGE for too long offset and length
  netfilter: nf_tables: make table handle allocation per-netns friendly
  netfilter: nf_tables: disallow updates of implicit chain
  netfilter: nft_tproxy: restrict to prerouting hook
  netfilter: conntrack: work around exceeded receive window
  netfilter: ebtables: reject blobs that don't provide all entry points
====================

Link: https://lore.kernel.org/r/20220824220330.64283-1-pablo@netfilter.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Commit c078290a ("selftests: include bonding tests into the kselftest
infra") adds the bonding tests in the directory:

  tools/testing/selftests/drivers/net/bonding/

The file entry in MAINTAINERS for the BONDING DRIVER however refers to:

  tools/testing/selftests/net/bonding/

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains about a
broken file pattern.

Repair this file entry in BONDING DRIVER.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Jonathan Toppins <jtoppins@redhat.com>
Link: https://lore.kernel.org/r/20220824072945.28606-1-lukas.bulwahn@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

It was not possible to create 1-tuple flow director
rule for IPv6 flow type. It was caused by incorrectly
checking for source IP address when validating user provided
destination IP address.

Fix this by changing ip6src to correct ip6dst address
in destination IP address validation for IPv6 flow type.

Fixes: efca91e8 ("i40e: Add flow director support for IPv6")
Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

The ixgbe_ptp_start_cyclecounter is intended to be called whenever the
cyclecounter parameters need to be changed.

Since commit a9763f3c ("ixgbe: Update PTP to support X550EM_x
devices"), this function has cleared the SYSTIME registers and reset the
TSAUXC DISABLE_SYSTIME bit.

While these need to be cleared during ixgbe_ptp_reset, it is wrong to clear
them during ixgbe_ptp_start_cyclecounter. This function may be called
during both reset and link status change. When link changes, the SYSTIME
counter is still operating normally, but the cyclecounter should be updated
to account for the possibly changed parameters.

Clearing SYSTIME when link changes causes the timecounter to jump because
the cycle counter now reads zero.

Extract the SYSTIME initialization out to a new function and call this
during ixgbe_ptp_reset. This prevents the timecounter adjustment and avoids
an unnecessary reset of the current time.

This also restores the original SYSTIME clearing that occurred during
ixgbe_ptp_reset before the commit above.
Reported-by: Steve Payne <spayne@aurora.tech>
Reported-by: Ilya Evenbach <ievenbach@aurora.tech>
Fixes: a9763f3c ("ixgbe: Update PTP to support X550EM_x devices")
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

Pull tracing fix from Steven Rostedt:

 - Fix build warning for when MODULES and FTRACE_WITH_DIRECT_CALLS are
   not set. A warning happens with ops_references_rec() defined but not
   used.

* tag 'trace-v6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace: Fix build warning for ops_references_rec() not used

Pull dmi update from Jean Delvare.

Tiny cleanup.

* 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  firmware: dmi: Use the proper accessor for the version field

There are opcodes that need ->async_data only in some cases and
allocation it unconditionally may hurt performance. Add an option to
opdef to make move the allocation part from the core io_uring to opcode
specific code.
Note, we can't just set opdef->async_size to zero because there are
other helpers that rely on it, e.g. io_alloc_async_data().
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/9dc62be9e88dd0ed63c48365340e8922d2498293.1661342812.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

Currently, there is no ordering between notification CQEs and
completions of the send flushing it, this quite complicates the
userspace, especially since we don't flush notification when the
send(+flush) request fails, i.e. there will be only one CQE. What we
can do is to make sure that notification completions come only after
sends.

The easiest way to achieve this is to not try to complete a notification
inline from io_sendzc() but defer it to task_work, considering that
io-wq sendzc is disallowed CQEs will be naturally ordered because
task_works will only be executed after we're done with submission and so
inline completion.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/cddfd1c2bf91f22b9fe08e13b7dffdd8f858a151.1661342812.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

Fix up indentation before we get complaints from tooling.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/bd5754e3764215ccd7fb04cd636ea9167aaa275d.1661342812.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

Failed requests should be marked with req_set_fail(), so links and cqe
skipping work correctly, which is missing in io_sendzc(). Note,
io_sendzc() return IOU_OK on failure, so the core code won't do the
cleanup for us.

Fixes: 06a5464b ("io_uring: wire send zc request type")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/e47d46fda9db30154ce66a549bb0d3380b780520.1661342812.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

Fix up the io_alloc_notif()'s __must_hold as we don't have a ctx
argument there but should get it from the slot instead.
Reported-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/cbb0a920f18e0aed590bf58300af817b9befb8a3.1661342812.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

Kuniyuki Iwashima says:

====================
net: sysctl: Fix data-races around net.core.XXX

This series fixes data-races around all knobs in net_core_table and
netns_core_table except for bpf stuff.

These knobs are skipped:

  - 4 bpf knobs
  - netdev_rss_key: Written only once by net_get_random_once() and
                    read-only knob
  - rps_sock_flow_entries: Protected with sock_flow_mutex
  - flow_limit_cpu_bitmap: Protected with flow_limit_update_mutex
  - flow_limit_table_len: Protected with flow_limit_update_mutex
  - default_qdisc: Protected with qdisc_mod_lock
  - warnings: Unused
  - high_order_alloc_disable: Protected with static_key_mutex
  - skb_defer_max: Already using READ_ONCE()
  - sysctl_txrehash: Already using READ_ONCE()

Note 5th patch fixes net.core.message_cost and net.core.message_burst,
and lib/ratelimit.c does not have an explicit maintainer.

Changes:
  v3:
    * Fix build failures of CONFIG_SYSCTL=n case in 13th & 14th patches

  v2: https://lore.kernel.org/netdev/20220818035227.81567-1-kuniyu@amazon.com/
    * Remove 4 bpf knobs and added 6 knobs

  v1: https://lore.kernel.org/netdev/20220816052347.70042-1-kuniyu@amazon.com/
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

While reading sysctl_somaxconn, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While reading netdev_unregister_timeout_secs, it can be changed
concurrently.  Thus, we need to add READ_ONCE() to its reader.

Fixes: 5aa3afe1 ("net: make unregister netdev warning timeout configurable")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While reading gro_normal_batch, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.

Fixes: 323ebb61 ("net: use listified RX for handling GRO_NORMAL skbs")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While reading sysctl_devconf_inherit_init_net, it can be changed
concurrently.  Thus, we need to add READ_ONCE() to its readers.

Fixes: 856c395c ("net: introduce a knob to control whether to inherit devconf config")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While reading sysctl_fb_tunnels_only_for_init_net, it can be changed
concurrently.  Thus, we need to add READ_ONCE() to its readers.

Fixes: 79134e6c ("net: do not create fallback tunnels for non-default namespaces")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While reading netdev_budget_usecs, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.

Fixes: 7acf8a1e ("Replace 2 jiffies with sysctl netdev_budget_usecs to enable softirq tuning")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While reading sysctl_max_skb_frags, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its readers.

Fixes: 5f74f82e ("net:Add sysctl_max_skb_frags")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While reading netdev_budget, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.

Fixes: 51b0bded ("[NET]: Separate two usages of netdev_max_backlog.")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While reading sysctl_net_busy_read, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.

Fixes: 2d48d67f ("net: poll/select low latency socket support")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>