Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

The code that sets up rq_vec is refactored so that it is now
adjacent to the nfsd_read() call site where it is used.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

This commit removes the last usage of the original decode_sattr3(),
so it is removed as a clean-up.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Similar to the WRITE decoder, code that checks the sanity of the
payload size is re-wired to work with xdr_stream infrastructure.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

As an additional clean up, neither nfsd3_proc_readdir() nor
nfsd3_proc_readdirplus() make use of the dircount argument, so
remove it from struct nfsd3_readdirargs.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

De-duplicate some code that is used by both READDIR and READDIRPLUS
to build the dirlist in the Reply. Because this code is not related
to decoding READ arguments, it is moved to a more appropriate spot.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Code inspection shows that the server's NFSv3 READDIR implementation
handles offset cookies slightly differently than the NFSv2 READDIR,
NFSv3 READDIRPLUS, and NFSv4 READDIR implementations,
and there doesn't seem to be any need for this difference.

As a clean up, I copied the logic from nfsd3_proc_readdirplus().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

The NFSv3 READLINK request takes a single filehandle, so it can
re-use GETATTR's decoder.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

As part of the update, open code that sanity-checks the size of the
data payload against the length of the RPC Call message has to be
re-implemented to use xdr_stream infrastructure.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

The code that sets up rq_vec is refactored so that it is now
adjacent to the nfsd_read() call site where it is used.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Clean up: The unit of XDR alignment is defined by RFC 4506,
not as part of the RPC message header. Thus it belongs in
include/linux/sunrpc/xdr.h.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Make the sunrpc trace subsystem trace events easier to use.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

The next few patches will employ these strings to help make server-
side trace logs more human-readable. A similar technique is already
in use in kernel RPC client code.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

Pull arch/sh updates from Rich Felker:
 "Cleanup and warning fixes"

* tag 'sh-for-5.11' of git://git.libc.org/linux-sh:
  sh/intc: Restore devm_ioremap() alignment
  sh: mach-sh03: remove duplicate include
  arch: sh: remove duplicate include
  sh: Drop ARCH_NR_GPIOS definition
  sh: Remove unused HAVE_COPY_THREAD_TLS macro
  sh: remove CONFIG_IDE from most defconfig
  sh: mm: Convert to DEFINE_SHOW_ATTRIBUTE
  sh: intc: Convert to DEFINE_SHOW_ATTRIBUTE
  arch/sh: hyphenate Non-Uniform in Kconfig prompt
  sh: dma: fix kconfig dependency for G2_DMA

Pull io_uring fixes from Jens Axboe:
 "Still need a final cancelation fix that isn't quite done done,
  expected in the next day or two. That said, this contains:

   - Wakeup fix for IOPOLL requests

   - SQPOLL split close op handling fix

   - Ensure that any use of io_uring fd itself is marked as inflight

   - Short non-regular file read fix (Pavel)

   - Fix up bad false positive warning (Pavel)

   - SQPOLL fixes (Pavel)

   - In-flight removal fix (Pavel)"

* tag 'io_uring-5.11-2021-01-24' of git://git.kernel.dk/linux-block:
  io_uring: account io_uring internal files as REQ_F_INFLIGHT
  io_uring: fix sleeping under spin in __io_clean_op
  io_uring: fix short read retries for non-reg files
  io_uring: fix SQPOLL IORING_OP_CLOSE cancelation state
  io_uring: fix skipping disabling sqo on exec
  io_uring: fix uring_flush in exit_files() warning
  io_uring: fix false positive sqo warning on flush
  io_uring: iopoll requests should also wake task ->in_idle state

Pull block fixes from Jens Axboe:

 - NVMe pull request from Christoph:
      - fix a status code in nvmet (Chaitanya Kulkarni)
      - avoid double completions in nvme-rdma/nvme-tcp (Chao Leng)
      - fix the CMB support to cope with NVMe 1.4 controllers (Klaus Jensen)
      - fix PRINFO handling in the passthrough ioctl (Revanth Rajashekar)
      - fix a double DMA unmap in nvme-pci

 - lightnvm error path leak fix (Pan)

 - MD pull request from Song:
      - Flush request fix (Xiao)

* tag 'block-5.11-2021-01-24' of git://git.kernel.dk/linux-block:
  lightnvm: fix memory leak when submit fails
  nvme-pci: fix error unwind in nvme_map_data
  nvme-pci: refactor nvme_unmap_data
  md: Set prev_flush_start and flush_bio in an atomic way
  nvmet: set right status on error in id-ns handler
  nvme-pci: allow use of cmb on v1.4 controllers
  nvme-tcp: avoid request double completion for concurrent nvme_tcp_timeout
  nvme-rdma: avoid request double completion for concurrent nvme_rdma_timeout
  nvme: check the PRINFO bit before deciding the host buffer length

Merge misc fixes from Andrew Morton:
 "18 patches.

  Subsystems affected by this patch series: mm (pagealloc, memcg, kasan,
  memory-failure, and highmem), ubsan, proc, and MAINTAINERS"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  MAINTAINERS: add a couple more files to the Clang/LLVM section
  proc_sysctl: fix oops caused by incorrect command parameters
  powerpc/mm/highmem: use __set_pte_at() for kmap_local()
  mips/mm/highmem: use set_pte() for kmap_local()
  mm/highmem: prepare for overriding set_pte_at()
  sparc/mm/highmem: flush cache and TLB
  mm: fix page reference leak in soft_offline_page()
  ubsan: disable unsigned-overflow check for i386
  kasan, mm: fix resetting page_alloc tags for HW_TAGS
  kasan, mm: fix conflicts with init_on_alloc/free
  kasan: fix HW_TAGS boot parameters
  kasan: fix incorrect arguments passing in kasan_add_zero_shadow
  kasan: fix unaligned address is unhandled in kasan_remove_zero_shadow
  mm: fix numa stats for thp migration
  mm: memcg: fix memcg file_dirty numa stat
  mm: memcg/slab: optimize objcg stock draining
  mm: fix initialization of struct page for holes in memory layout
  x86/setup: don't remove E820_TYPE_RAM for pfn 0

Pull char/misc driver fixes from Greg KH:
 "Here are some small char/misc driver fixes for 5.11-rc5:

   - habanalabs driver fixes

   - phy driver fixes

   - hwtracing driver fixes

   - rtsx cardreader driver fix

  All of these have been in linux-next with no reported issues"

* tag 'char-misc-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  misc: rtsx: init value of aspm_enabled
  habanalabs: disable FW events on device removal
  habanalabs: fix backward compatibility of idle check
  habanalabs: zero pci counters packet before submit to FW
  intel_th: pci: Add Alder Lake-P support
  stm class: Fix module init return on allocation failure
  habanalabs: prevent soft lockup during unmap
  habanalabs: fix reset process in case of failures
  habanalabs: fix dma_addr passed to dma_mmap_coherent
  phy: mediatek: allow compile-testing the dsi phy
  phy: cpcap-usb: Fix warning for missing regulator_disable
  PHY: Ingenic: fix unconditional build of phy-ingenic-usb

Merge tag 'driver-core-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are some small driver core fixes for 5.11-rc5 that resolve some
  reported problems:

   - revert of a -rc1 patch that was causing problems with some machines

   - device link device name collision problem fix (busses only have to
     name devices unique to their bus, not unique to all busses)

   - kernfs splice bugfixes to resolve firmware loading problems for
     Qualcomm systems.

   - other tiny driver core fixes for minor issues reported.

  All of these have been in linux-next with no reported problems"

* tag 'driver-core-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  driver core: Fix device link device name collision
  driver core: Extend device_is_dependent()
  kernfs: wire up ->splice_read and ->splice_write
  kernfs: implement ->write_iter
  kernfs: implement ->read_iter
  Revert "driver core: Reorder devices on successful probe"
  Driver core: platform: Add extra error check in devm_platform_get_irqs_affinity()
  drivers core: Free dma_range_map when driver probe failed

Pull staging/IIO driver fixes from Greg KH:
 "Here are some IIO driver fixes for 5.11-rc5 to resolve some reported
  problems.

  Nothing major, just a few small fixes, all of these have been in
  linux-next for a while and full details are in the shortlog"

* tag 'staging-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio: sx9310: Fix semtech,avg-pos-strength setting when > 16
  iio: common: st_sensors: fix possible infinite loop in st_sensors_irq_thread
  iio: ad5504: Fix setting power-down state
  counter:ti-eqep: remove floor
  drivers: iio: temperature: Add delay after the addressed reset command in mlx90632.c
  iio: adc: ti_am335x_adc: remove omitted iio_kfifo_free()
  dt-bindings: iio: accel: bma255: Fix bmc150/bmi055 compatible
  iio: sx9310: Off by one in sx9310_read_thresh()

Pull tty/serial fixes from Greg KH:
 "Here are three small tty/serial fixes for 5.11-rc5 to resolve reported
  problems:

   - two patches to fix up writing to ttys with splice

   - mvebu-uart driver fix for reported problem

  All of these have been in linux-next with no reported problems"

* tag 'tty-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: fix up hung_up_tty_write() conversion
  tty: implement write_iter
  serial: mvebu-uart: fix tx lost characters at power off

Pull USB fixes from Greg KH:
 "Here are some small USB driver fixes for 5.11-rc5.  They resolve:

   - xhci issues for some reported problems

   - ehci driver issue for one specific device

   - USB gadget fixes for some reported problems

   - cdns3 driver fixes for issues reported

   - MAINTAINERS file update

   - thunderbolt minor fix

  All of these have been in linux-next with no reported issues"

* tag 'usb-5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: bdc: Make bdc pci driver depend on BROKEN
  xhci: tegra: Delay for disabling LFPS detector
  xhci: make sure TRB is fully written before giving it to the controller
  usb: udc: core: Use lock when write to soft_connect
  USB: gadget: dummy-hcd: Fix errors in port-reset handling
  usb: gadget: aspeed: fix stop dma register setting.
  USB: ehci: fix an interrupt calltrace error
  ehci: fix EHCI host controller initialization sequence
  MAINTAINERS: update Peter Chen's email address
  thunderbolt: Drop duplicated 0x prefix from format string
  MAINTAINERS: Update address for Cadence USB3 driver
  usb: cdns3: imx: improve driver .remove API
  usb: cdns3: imx: fix can't create core device the second time issue
  usb: cdns3: imx: fix writing read-only memory issue

The K: entry should ensure that Nick and I always get CC'd on patches that
touch these files but it is better to be explicit rather than implicit.

Link: https://lkml.kernel.org/r/20210114004059.2129921-1-natechancellor@gmail.comSigned-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The process_sysctl_arg() does not check whether val is empty before
invoking strlen(val).  If the command line parameter () is incorrectly
configured and val is empty, oops is triggered.

For example:
  "hung_task_panic=1" is incorrectly written as "hung_task_panic", oops is
  triggered. The call stack is as follows:
    Kernel command line: .... hung_task_panic
    ......
    Call trace:
    __pi_strlen+0x10/0x98
    parse_args+0x278/0x344
    do_sysctl_args+0x8c/0xfc
    kernel_init+0x5c/0xf4
    ret_from_fork+0x10/0x30

To fix it, check whether "val" is empty when "phram" is a sysctl field.
Error codes are returned in the failure branch, and error logs are
generated by parse_args().

Link: https://lkml.kernel.org/r/20210118133029.28580-1-nixiaoming@huawei.com
Fixes: 3db978d4 ("kernel/sysctl: support setting sysctl parameters from kernel command line")
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Iurii Zaikin <yzaikin@google.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: <stable@vger.kernel.org>	[5.8+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The original PowerPC highmem mapping function used __set_pte_at() to
denote that the mapping is per CPU.  This got lost with the conversion
to the generic implementation.

Override the default map function.

Link: https://lkml.kernel.org/r/20210112170411.281464308@linutronix.de
Fixes: 47da42b2 ("powerpc/mm/highmem: Switch to generic kmap atomic")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

set_pte_at() on MIPS invokes update_cache() which might recurse into
kmap_local().

Use set_pte() like the original MIPS highmem implementation did.

Link: https://lkml.kernel.org/r/20210112170411.187513575@linutronix.de
Fixes: a4c33e83 ("mips/mm/highmem: Switch to generic kmap atomic")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reported-by: Paul Cercueil <paul@crapouillou.net>
Reported-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The generic kmap_local() map function uses set_pte_at(), but MIPS requires
set_pte() and PowerPC wants __set_pte_at().

Provide arch_kmap_local_set_pte() and default it to set_pte_at().

Link: https://lkml.kernel.org/r/20210112170411.056306194@linutronix.deSigned-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Patch series "mm/highmem: Fix fallout from generic kmap_local
conversions".

The kmap_local conversion wreckaged sparc, mips and powerpc as it missed
some of the details in the original implementation.

This patch (of 4):

The recent conversion to the generic kmap_local infrastructure failed to
assign the proper pre/post map/unmap flush operations for sparc.

Sparc requires cache flush before map/unmap and tlb flush afterwards.

Link: https://lkml.kernel.org/r/20210112170136.078559026@linutronix.de
Link: https://lkml.kernel.org/r/20210112170410.905976187@linutronix.de
Fixes: 3293efa9 ("sparc/mm/highmem: Switch to generic kmap atomic")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reported-by: Andreas Larsson <andreas@gaisler.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The conversion to move pfn_to_online_page() internal to
soft_offline_page() missed that the get_user_pages() reference taken by
the madvise() path needs to be dropped when pfn_to_online_page() fails.

Note the direct sysfs-path to soft_offline_page() does not perform a
get_user_pages() lookup.

When soft_offline_page() is handed a pfn_valid() && !pfn_to_online_page()
pfn the kernel hangs at dax-device shutdown due to a leaked reference.

Link: https://lkml.kernel.org/r/161058501210.1840162.8108917599181157327.stgit@dwillia2-desk3.amr.corp.intel.com
Fixes: feec24a6 ("mm, soft-offline: convert parameter to pfn")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Qian Cai <cai@lca.pw>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>