Commit Graph

839605 Commits

Author SHA1 Message Date
David Howells 4571577f16 afs: Always get the reply time
Always ask for the reply time from AF_RXRPC as it's used to calculate the
callback expiry time and lock expiry times, so it's needed by most FS
operations.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:21 +01:00
David Howells d9052dda8a afs: Don't invalidate callback if AFS_VNODE_DIR_VALID not set
Don't invalidate the callback promise on a directory if the
AFS_VNODE_DIR_VALID flag is not set (which indicates that the directory
contents are invalid, due to edit failure, callback break, page reclaim).

The directory will be reloaded next time the directory is accessed, so
clearing the callback flag at this point may race with a reload of the
directory and cancel it's recorded callback promise.

Fixes: f3ddee8dc4 ("afs: Fix directory handling")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:21 +01:00
David Howells 87182759cd afs: Fix order-1 allocation in afs_do_lookup()
afs_do_lookup() will do an order-1 allocation to allocate status records if
there are more than 39 vnodes to stat.

Fix this by allocating an array of {status,callback} records for each vnode
we want to examine using vmalloc() if larger than a page.

This not only gets rid of the order-1 allocation, but makes it easier to
grow beyond 50 records for YFS servers.  It also allows us to move to
{status,callback} tuples for other calls too and makes it easier to lock
across the application of the status and the callback to the vnode.

Fixes: 5cf9dd55a0 ("afs: Prospectively look up extra files when doing a single lookup")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:21 +01:00
David Howells 781070551c afs: Fix calculation of callback expiry time
Fix the calculation of the expiry time of a callback promise, as obtained
from operations like FS.FetchStatus and FS.FetchData.

The time should be based on the timestamp of the first DATA packet in the
reply and the calculation needs to turn the ktime_t timestamp into a
time64_t.

Fixes: c435ee3455 ("afs: Overhaul the callback handling")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:21 +01:00
David Howells ffba718e93 afs: Get rid of afs_call::reply[]
Replace the afs_call::reply[] array with a bunch of typed members so that
the compiler can use type-checking on them.  It's also easier for the eye
to see what's going on.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:21 +01:00
David Howells 3b05e528cb afs: Make dynamic root population wait uninterruptibly for proc_cells_lock
Make dynamic root population wait uninterruptibly for proc_cells_lock.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:21 +01:00
David Howells fefb2483dc afs: Don't pass the vnode pointer through into the inline bulk status op
Don't pass the vnode pointer through into the inline bulk status op.  We
want to process the status records outside of it anyway.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:21 +01:00
David Howells 20b8391fff afs: Make some RPC operations non-interruptible
Make certain RPC operations non-interruptible, including:

 (*) Set attributes
 (*) Store data

     We don't want to get interrupted during a flush on close, flush on
     unlock, writeback or an inode update, leaving us in a state where we
     still need to do the writeback or update.

 (*) Extend lock
 (*) Release lock

     We don't want to get lock extension interrupted as the file locks on
     the server are time-limited.  Interruption during lock release is less
     of an issue since the lock is time-limited, but it's better to
     complete the release to avoid a several-minute wait to recover it.

     *Setting* the lock isn't a problem if it's interrupted since we can
      just return to the user and tell them they were interrupted - at
      which point they can elect to retry.

 (*) Silly unlink

     We want to remove silly unlink files if we can, rather than leaving
     them for the salvager to clear up.

Note that whilst these calls are no longer interruptible, they do have
timeouts on them, so if the server stops responding the call will fail with
something like ETIME or ECONNRESET.

Without this, the following:

	kAFS: Unexpected error from FS.StoreData -512

appears in dmesg when a pending store data gets interrupted and some
processes may just hang.

Additionally, make the code that checks/updates the server record ignore
failure due to interruption if the main call is uninterruptible and if the
server has an address list.  The next op will check it again since the
expiration time on the old list has past.

Fixes: d2ddc776a4 ("afs: Overhaul volume and server record caching and fileserver rotation")
Reported-by: Jonathan Billings <jsbillings@jsbillings.org>
Reported-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:20 +01:00
David Howells b960a34b73 rxrpc: Allow the kernel to mark a call as being non-interruptible
Allow kernel services using AF_RXRPC to indicate that a call should be
non-interruptible.  This allows kafs to make things like lock-extension and
writeback data storage calls non-interruptible.

If this is set, signals will be ignored for operations on that call where
possible - such as waiting to get a call channel on an rxrpc connection.

It doesn't prevent UDP sendmsg from being interrupted, but that will be
handled by packet retransmission.

rxrpc_kernel_recv_data() isn't affected by this since that never waits,
preferring instead to return -EAGAIN and leave the waiting to the caller.

Userspace initiated calls can't be set to be uninterruptible at this time.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:20 +01:00
David Howells 0ab4c95948 afs: Fix error propagation from server record check/update
afs_check/update_server_record() should be setting fc->error rather than
fc->ac.error as they're called from within the cursor iteration function.

afs_fs_cursor::error is where the error code of the attempt to call the
operation on multiple servers is integrated and is the final result,
whereas afs_addr_cursor::error is used to hold the error from individual
iterations of the call loop.  (Note there's also an afs_vl_cursor which
also wraps afs_addr_cursor for accessing VL servers rather than file
servers).

Fix this by setting fc->error in the afs_check/update_server_record() so
that any error incurred whilst talking to the VL server correctly
propagates to the final result.

This results in:

	kAFS: Unexpected error from FS.StoreData -512

being seen, even though the store-data op is non-interruptible.  The error
is actually coming from the server record update getting interrupted.

Fixes: d2ddc776a4 ("afs: Overhaul volume and server record caching and fileserver rotation")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:20 +01:00
David Howells 94f699c9cd afs: Fix the maximum lifespan of VL and probe calls
If an older AFS server doesn't support an operation, it may accept the call
and then sit on it forever, happily responding to pings that make kafs
think that the call is still alive.

Fix this by setting the maximum lifespan of Volume Location service calls
in particular and probe calls in general so that they don't run on
endlessly if they're not supported.

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:20 +01:00
Linus Torvalds a455eda33f Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal
Pull thermal soc updates from Eduardo Valentin:

 - thermal core has a new devm_* API for registering cooling devices. I
   took the entire series, that is why you see changes on drivers/hwmon
   in this pull (Guenter Roeck)

 - rockchip thermal driver gains support to PX30 SoC (Elaine Zhang)

 - the generic-adc thermal driver now considers the lookup table DT
   property as optional (Jean-Francois Dagenais)

 - Refactoring of tsens thermal driver (Amit Kucheria)

 - Cleanups on cpu cooling driver (Daniel Lezcano)

 - broadcom thermal driver dropped support to ACPI (Srinath Mannam)

 - tegra thermal driver gains support to OC hw throttle and GPU throtle
   (Wei Ni)

 - Fixes in several thermal drivers.

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal: (59 commits)
  hwmon: (pwm-fan) Use devm_thermal_of_cooling_device_register
  hwmon: (npcm750-pwm-fan) Use devm_thermal_of_cooling_device_register
  hwmon: (mlxreg-fan) Use devm_thermal_of_cooling_device_register
  hwmon: (gpio-fan) Use devm_thermal_of_cooling_device_register
  hwmon: (aspeed-pwm-tacho) Use devm_thermal_of_cooling_device_register
  thermal: rcar_gen3_thermal: Fix to show correct trip points number
  thermal: rcar_thermal: update calculation formula for R-Car Gen3 SoCs
  thermal: cpu_cooling: Actually trace CPU load in thermal_power_cpu_get_power
  thermal: rockchip: Support the PX30 SoC in thermal driver
  dt-bindings: rockchip-thermal: Support the PX30 SoC compatible
  thermal: rockchip: fix up the tsadc pinctrl setting error
  thermal: broadcom: Remove ACPI support
  thermal: Fix build error of missing devm_ioremap_resource on UM
  thermal/drivers/cpu_cooling: Remove pointless field
  thermal/drivers/cpu_cooling: Add Software Package Data Exchange (SPDX)
  thermal/drivers/cpu_cooling: Fixup the header and copyright
  thermal/drivers/cpu_cooling: Remove pointless test in power2state()
  thermal: rcar_gen3_thermal: disable interrupt in .remove
  thermal: rcar_gen3_thermal: fix interrupt type
  thermal: Introduce devm_thermal_of_cooling_device_register
  ...
2019-05-16 07:56:57 -07:00
Jackie Liu 7a102d9044 block/bio-integrity: use struct_size() in kmalloc()
Use the new struct_size() helper to keep code simple.

Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-16 08:48:48 -06:00
David Howells bbd172e316 rxrpc: Provide kernel interface to set max lifespan on a call
Provide an interface to set max lifespan on a call from inside of the
kernel without having to call kernel_sendmsg().

Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 15:48:30 +01:00
David Howells 51eba99970 afs: Fix "kAFS: AFS vnode with undefined type 0"
Under some circumstances afs_select_fileserver() can return without setting
an error in fc->error.  The problem is in the no_more_servers segment where
the accumulated errors from attempts to contact various servers are
integrated into an afs_error-type variable 'e'.  The resultant error code
is, however, then abandoned.

Fix this by getting the error out of e.error and putting it in 'error' so
that the next part will store it into fc->error.

Not doing this causes a report like the following:

    kAFS: AFS vnode with undefined type 0
    kAFS: A=0 m=0 s=0 v=0
    kAFS: vnode 20000025:1:1

because the code following the server selection loop then sees what it
thinks is a successful invocation because fc.error is 0.  However, it can't
apply the status record because it's all zeros.

The report is followed on the first instance with a trace looking something
like:

     dump_stack+0x67/0x8e
     afs_inode_init_from_status.isra.2+0x21b/0x487
     afs_fetch_status+0x119/0x1df
     afs_iget+0x130/0x295
     afs_get_tree+0x31d/0x595
     vfs_get_tree+0x1f/0xe8
     fc_mount+0xe/0x36
     afs_d_automount+0x328/0x3c3
     follow_managed+0x109/0x20a
     lookup_fast+0x3bf/0x3f8
     do_last+0xc3/0x6a4
     path_openat+0x1af/0x236
     do_filp_open+0x51/0xae
     ? _raw_spin_unlock+0x24/0x2d
     ? __alloc_fd+0x1a5/0x1b7
     do_sys_open+0x13b/0x1e8
     do_syscall_64+0x7d/0x1b3
     entry_SYSCALL_64_after_hwframe+0x49/0xbe

Fixes: 4584ae96ae ("afs: Fix missing net error handling")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 15:48:20 +01:00
Aneesh Kumar K.V 6457f42eb3 powerpc/mm: Drop VM_BUG_ON in get_region_id()
We call get_region_id() without validating the ea value. That means
with a wrong ea value we hit the BUG as below.

  kernel BUG at arch/powerpc/include/asm/book3s/64/hash.h:129!
  Oops: Exception in kernel mode, sig: 5 [#1]
  LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries
  CPU: 0 PID: 3937 Comm: access_tests Not tainted 5.1.0
  ....
  NIP [c00000000007ba20] do_slb_fault+0x70/0x320
  LR [c00000000000896c] data_access_slb_common+0x15c/0x1a0

Fix this by removing the VM_BUG_ON. All callers make sure the returned
region id is valid and error out otherwise.

Fixes: 0034d395f8 ("powerpc/mm/hash64: Map all the kernel regions in the same 0xc range")
Reported-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-05-17 00:40:01 +10:00
Linus Torvalds cc7ce90153 drm i915, amdgpu, nouveau, msm, panfrost, bridge, pl111 fixes
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Merge tag 'drm-next-2019-05-16' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "A bunch of fixes for the merge window closure, doesn't seem to be
  anything too major or serious in there.

  It does add TU117 turing modesetting to nouveau but it's just an
  enable for preexisting code.

  amdgpu:
   - gpu reset at load crash fix
   - ATPX hotplug fix for when dGPU is off
   - SR-IOV fixes

  radeon:
   - r5xx pll fixes

  i915:
   - GVT (MCHBAR, buffer alignment, misc warnings fixes)
   - Fixes for newly enabled semaphore code
   - Geminilake disable framebuffer compression
   - HSW edp fast modeset fix
   - IRQ vs RCU race fix

  nouveau:
   - Turing modesetting fixes
   - TU117 support

  msm:
   - SDM845 bringup fixes

  panfrost:
   - static checker fixes

  pl111:
   - spinlock init fix.

  bridge:
   - refresh rate register fix for adv7511"

* tag 'drm-next-2019-05-16' of git://anongit.freedesktop.org/drm/drm: (36 commits)
  drm/msm: Upgrade gxpd checks to IS_ERR_OR_NULL
  drm/msm/dpu: Remove duplicate header
  drm/pl111: Initialize clock spinlock early
  drm/msm: correct attempted NULL pointer dereference in debugfs
  drm/msm: remove resv fields from msm_gem_object struct
  drm/nouveau: fix duplication of nv50_head_atom struct
  drm/nouveau/disp/dp: respect sink limits when selecting failsafe link configuration
  drm/nouveau/core: initial support for boards with TU117 chipset
  drm/nouveau/core: allow detected chipset to be overridden
  drm/nouveau/kms/gf119-gp10x: push HeadSetControlOutputResource() mthd when encoders change
  drm/nouveau/kms/nv50-: fix bug preventing non-vsync'd page flips
  drm/nouveau/kms/gv100-: fix spurious window immediate interlocks
  drm/bridge: adv7511: Fix low refresh rate selection
  drm/panfrost: Add missing _fini() calls in panfrost_device_fini()
  drm/panfrost: Only put sync_out if non-NULL
  drm/i915: Seal races between async GPU cancellation, retirement and signaling
  drm/i915: Fix fastset vs. pfit on/off on HSW EDP transcoder
  drm/i915/fbc: disable framebuffer compression on GeminiLake
  drm/amdgpu/psp: move psp version specific function pointers to early_init
  drm/radeon: prefer lower reference dividers
  ...
2019-05-16 07:22:42 -07:00
Jackie Liu fdb288a679 io_uring: use wait_event_interruptible for cq_wait conditional wait
The previous patch has ensured that io_cqring_events contain
smp_rmb memory barriers, Now we can use wait_event_interruptible
to keep the code simple.

Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-16 08:10:27 -06:00
Jackie Liu dc6ce4bc2b io_uring: adjust smp_rmb inside io_cqring_events
Whenever smp_rmb is required to use io_cqring_events,
keep smp_rmb inside the function io_cqring_events.

Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-16 08:10:25 -06:00
Roman Penyaev 2bbcd6d3b3 io_uring: fix infinite wait in khread_park() on io_finish_async()
This fixes couple of races which lead to infinite wait of park completion
with the following backtraces:

  [20801.303319] Call Trace:
  [20801.303321]  ? __schedule+0x284/0x650
  [20801.303323]  schedule+0x33/0xc0
  [20801.303324]  schedule_timeout+0x1bc/0x210
  [20801.303326]  ? schedule+0x3d/0xc0
  [20801.303327]  ? schedule_timeout+0x1bc/0x210
  [20801.303329]  ? preempt_count_add+0x79/0xb0
  [20801.303330]  wait_for_completion+0xa5/0x120
  [20801.303331]  ? wake_up_q+0x70/0x70
  [20801.303333]  kthread_park+0x48/0x80
  [20801.303335]  io_finish_async+0x2c/0x70
  [20801.303336]  io_ring_ctx_wait_and_kill+0x95/0x180
  [20801.303338]  io_uring_release+0x1c/0x20
  [20801.303339]  __fput+0xad/0x210
  [20801.303341]  task_work_run+0x8f/0xb0
  [20801.303342]  exit_to_usermode_loop+0xa0/0xb0
  [20801.303343]  do_syscall_64+0xe0/0x100
  [20801.303349]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

  [20801.303380] Call Trace:
  [20801.303383]  ? __schedule+0x284/0x650
  [20801.303384]  schedule+0x33/0xc0
  [20801.303386]  io_sq_thread+0x38a/0x410
  [20801.303388]  ? __switch_to_asm+0x40/0x70
  [20801.303390]  ? wait_woken+0x80/0x80
  [20801.303392]  ? _raw_spin_lock_irqsave+0x17/0x40
  [20801.303394]  ? io_submit_sqes+0x120/0x120
  [20801.303395]  kthread+0x112/0x130
  [20801.303396]  ? kthread_create_on_node+0x60/0x60
  [20801.303398]  ret_from_fork+0x35/0x40

 o kthread_park() waits for park completion, so io_sq_thread() loop
   should check kthread_should_park() along with khread_should_stop(),
   otherwise if kthread_park() is called before prepare_to_wait()
   the following schedule() never returns:

   CPU#0                    CPU#1

   io_sq_thread_stop():     io_sq_thread():

                               while(!kthread_should_stop() && !ctx->sqo_stop) {

      ctx->sqo_stop = 1;
      kthread_park()

	                            prepare_to_wait();
                                    if (kthread_should_stop() {
				    }
                                    schedule();   <<< nobody checks park flag,
				                  <<< so schedule and never return

 o if the flag ctx->sqo_stop is observed by the io_sq_thread() loop
   it is quite possible, that kthread_should_park() check and the
   following kthread_parkme() is never called, because kthread_park()
   has not been yet called, but few moments later is is called and
   waits there for park completion, which never happens, because
   kthread has already exited:

   CPU#0                    CPU#1

   io_sq_thread_stop():     io_sq_thread():

      ctx->sqo_stop = 1;
                               while(!kthread_should_stop() && !ctx->sqo_stop) {
                                   <<< observe sqo_stop and exit the loop
			       }

			       if (kthread_should_park())
			           kthread_parkme();  <<< never called, since was
					              <<< never parked

      kthread_park()           <<< waits forever for park completion

In the current patch we quit the loop by only kthread_should_park()
check (kthread_park() is synchronous, so kthread_should_stop() is
never observed), and we abandon ->sqo_stop flag, since it is racy.
At the end of the io_sq_thread() we unconditionally call parmke(),
since we've exited the loop by the park flag.

Signed-off-by: Roman Penyaev <rpenyaev@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-16 08:10:24 -06:00
Sheetal Singala 8454fca4f5 dm: fix a couple brace coding style issues
Signed-off-by: Sheetal Singala <2396sheetal@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2019-05-16 10:09:21 -04:00
Milan Broz f710126cfc dm crypt: print device name in integrity error message
This message should better identify the DM device with the integrity
failure.

Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2019-05-16 10:09:20 -04:00
Milan Broz 7a1cd7238f dm crypt: move detailed message into debug level
The information about tag size should not be printed without debug info
set. Also print device major:minor in the error message to identify the
device instance.

Also use rate limiting and debug level for info about used crypto API
implementaton.  This is important because during online reencryption
the existing message saturates syslog (because we are moving hotzone
across the whole device).

Cc: stable@vger.kernel.org
Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2019-05-16 10:09:20 -04:00
Jens Axboe 47ca23c117 Merge branch 'nvme-5.2' of git://git.infradead.org/nvme into for-5.2/block-post
Pull NVMe fixes from Christoph

* 'nvme-5.2' of git://git.infradead.org/nvme:
  nvme: validate cntlid during controller initialisation
  nvme: change locking for the per-subsystem controller list
  nvme: trace all async notice events
  nvme: fix typos in nvme status code values
  nvme-fabrics: remove unused argument
  nvme-multipath: avoid crash on invalid subsystem cntlid enumeration
  nvme-fc: use separate work queue to avoid warning
  nvme-rdma: remove redundant reference between ib_device and tagset
  nvme-pci: mark expected switch fall-through
  nvme-pci: add known admin effects to augument admin effects log page
  nvme-pci: init shadow doorbell after each reset
2019-05-16 08:07:57 -06:00
Helen Koike 0f41fcf788 dm ioctl: fix hang in early create error condition
The dm_early_create() function (which deals with "dm-mod.create=" kernel
command line option) calls dm_hash_insert() who gets an extra reference
to the md object.

In case of failure, this reference wasn't being released, causing
dm_destroy() to hang, thus hanging the whole boot process.

Fix this by calling __hash_remove() in the error path.

Fixes: 6bbc923dfc ("dm: add support to directly boot to a mapped device")
Cc: stable@vger.kernel.org
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2019-05-16 09:52:06 -04:00
David Howells d5c32c89b2 afs: Fix cell DNS lookup
Currently, once configured, AFS cells are looked up in the DNS at regular
intervals - which is a waste of resources if those cells aren't being
used.  It also leads to a problem where cells preloaded, but not
configured, before the network is brought up end up effectively statically
configured with no VL servers and are unable to get any.

Fix this by not doing the DNS lookup until the first time a cell is
touched.  It is waited for if we don't have any cached records yet,
otherwise the DNS lookup to maintain the record is done in the background.

This has the downside that the first time you touch a cell, you now have to
wait for the upcall to do the required DNS lookups rather than them already
being cached.

Further, the record is not replaced if the old record has at least one
server in it and the new record doesn't have any.

Fixes: 0a5143f2f8 ("afs: Implement VL server rotation")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 12:58:23 +01:00
Vincenzo Frascino af9abd6598 nds32: Fix vDSO clock_getres()
clock_getres in the vDSO library has to preserve the same behaviour
of posix_get_hrtimer_res().

In particular, posix_get_hrtimer_res() does:
    sec = 0;
    ns = hrtimer_resolution;
and hrtimer_resolution depends on the enablement of the high
resolution timers that can happen either at compile or at run time.

Fix the nds32 vdso implementation of clock_getres keeping a copy of
hrtimer_resolution in vdso data and using that directly.

Cc: Greentime Hu <green.hu@gmail.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
2019-05-16 15:07:08 +08:00
Andy Lutomirski 9d8d0294e7 x86/speculation/mds: Improve CPU buffer clear documentation
On x86_64, all returns to usermode go through
prepare_exit_to_usermode(), with the sole exception of do_nmi().
This even includes machine checks -- this was added several years
ago to support MCE recovery.  Update the documentation.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jon Masters <jcm@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Fixes: 04dcbdb805 ("x86/speculation/mds: Clear CPU buffers on exit to user")
Link: http://lkml.kernel.org/r/999fa9e126ba6a48e9d214d2f18dbde5c62ac55c.1557865329.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-05-16 09:05:12 +02:00
Andy Lutomirski 88640e1dcd x86/speculation/mds: Revert CPU buffer clear on double fault exit
The double fault ESPFIX path doesn't return to user mode at all --
it returns back to the kernel by simulating a #GP fault.
prepare_exit_to_usermode() will run on the way out of
general_protection before running user code.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jon Masters <jcm@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Fixes: 04dcbdb805 ("x86/speculation/mds: Clear CPU buffers on exit to user")
Link: http://lkml.kernel.org/r/ac97612445c0a44ee10374f6ea79c222fe22a5c4.1557865329.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-05-16 09:05:11 +02:00
Ingo Molnar 00f5764dbb Merge branch 'linus' into x86/urgent, to pick up dependent changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-05-16 09:04:48 +02:00
Greentime Hu 63e07e2029 MAINTAINERS: update nds32 git repo path
We use git.kernel.org to put nds32's latest code instead of github.

Signed-off-by: Greentime Hu <greentime@andestech.com>
2019-05-16 14:40:26 +08:00
Christoph Hellwig a771e92250 nds32: don't export low-level cache flushing routines
None of these is used by modules.  Nor should they as we have better
highlevel primitives.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
2019-05-16 14:40:26 +08:00
Olof Johansson 7a0c4c1708 Merge branch 'fixes' into arm/soc
Merge in a few pending fixes from pre-5.1 that didn't get sent in:

MAINTAINERS: update arch/arm/mach-davinci
ARM: dts: ls1021: Fix SGMII PCS link remaining down after PHY disconnect
ARM: dts: imx6q-logicpd: Reduce inrush current on USBH1
ARM: dts: imx6q-logicpd: Reduce inrush current on start
ARM: dts: imx: Fix the AR803X phy-mode
ARM: dts: sun8i: a33: Reintroduce default pinctrl muxing
arm64: dts: allwinner: a64: Rename hpvcc-supply to cpvdd-supply
ARM: sunxi: fix a leaked reference by adding missing of_node_put
ARM: sunxi: fix a leaked reference by adding missing of_node_put

Signed-off-by: Olof Johansson <olof@lixom.net>
2019-05-15 22:51:48 -07:00
Ronnie Sahlberg dece44e381 cifs: add support for SEEK_DATA and SEEK_HOLE
Add llseek op for SEEK_DATA and SEEK_HOLE.
Improves xfstests/285,286,436,445,448 and 490

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-15 22:27:53 -05:00
Kovtunenko Oleksandr 9ab70ca653 Fixed https://bugzilla.kernel.org/show_bug.cgi?id=202935 allow write on the same file
Copychunk allows source and target to be on the same file.
For details on restrictions see MS-SMB2 3.3.5.15.6

Signed-off-by: Kovtunenko Oleksandr <alexander198961@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-05-15 22:27:53 -05:00
Long Li 2c87d6a94d cifs: Allocate memory for all iovs in smb2_ioctl
An IOCTL uses up to 2 iovs. The 1st iov is the command itself, the 2nd iov is
optional data for that command. The 1st iov is always allocated on the heap
but the 2nd iov may point to a variable on the stack. This will trigger an
error when passing the 2nd iov for RDMA I/O.

Fix this by allocating a buffer for the 2nd iov.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie sahlberg <lsahlber@redhat.com>
2019-05-15 22:27:53 -05:00
Long Li 3b24911571 cifs: Don't match port on SMBDirect transport
SMBDirect manages its own ports in the transport layer, there is no need to
check the port to find a connection.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie sahlberg <lsahlber@redhat.com>
2019-05-15 22:27:45 -05:00
Linus Torvalds 83f3ef3de6 libnvdimm fixes 5.2-rc1
* Fix a long standing namespace label corruption scenario when
   re-provisioning capacity for a namespace.
 
 * Restore the ability of the dax_pmem module to be built-in.
 
 * Harden the build for the 'nfit_test' unit test modules so that the
   userspace test harness can ensure all required test modules are
   available.
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Merge tag 'libnvdimm-fixes-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dan Williams:
 "Just a small collection of fixes this time around.

  The new virtio-pmem driver is nearly ready, but some last minute
  device-mapper acks and virtio questions made it prudent to await v5.3.

  Other major topics that were brewing on the linux-nvdimm mailing list
  like sub-section hotplug, and other devm_memremap_pages() reworks will
  go upstream through Andrew's tree.

  Summary:

   - Fix a long standing namespace label corruption scenario when
     re-provisioning capacity for a namespace.

   - Restore the ability of the dax_pmem module to be built-in.

   - Harden the build for the 'nfit_test' unit test modules so that the
     userspace test harness can ensure all required test modules are
     available"

* tag 'libnvdimm-fixes-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  drivers/dax: Allow to include DEV_DAX_PMEM as builtin
  libnvdimm/namespace: Fix label tracking error
  tools/testing/nvdimm: add watermarks for dax_pmem* modules
  dax/pmem: Fix whitespace in dax_pmem
2019-05-15 18:56:50 -07:00
Linus Torvalds 8649efb2f8 power supply and reset changes for the v5.2 series
Core:
  * Add over-current health state
  * Add standard, adaptive and custom charge types
  * Add new properties for start/end charge threshold
 
 New Drivers / Hardware:
  * UCS1002 Programmable USB Port Power Controller
  * Ingenic JZ47xx Battery Fuel Gauge
  * AXP20x USB Power: Add AXP813 support
  * AT91 poweroff: Add SAM9X60 support
  * OLPC battery: Add XO-1.5 and XO-1.75 support
 
 Misc. Changes:
  * syscon-reboot: support mask property
  * AXP288 fuel gauge: Blacklist ACEPC T8/T11
   - Looks like some vendor thought it's a good idea to
     build a desktop system with a fuel gauge, that slowly
     "discharges"...
  * cpcap-battery: Fix calculation errors
  * misc. fixes
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Merge tag 'for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply and reset updates from Sebastian Reichel:
 "Core:
   - Add over-current health state
   - Add standard, adaptive and custom charge types
   - Add new properties for start/end charge threshold

  New Drivers / Hardware:
   - UCS1002 Programmable USB Port Power Controller
   - Ingenic JZ47xx Battery Fuel Gauge
   - AXP20x USB Power: Add AXP813 support
   - AT91 poweroff: Add SAM9X60 support
   - OLPC battery: Add XO-1.5 and XO-1.75 support

  Misc Changes:
   - syscon-reboot: support mask property
   - AXP288 fuel gauge: Blacklist ACEPC T8/T11. Looks like some vendor
     thought it's a good idea to build a desktop system with a fuel
     gauge, that slowly "discharges"...
   - cpcap-battery: Fix calculation errors
   - misc fixes"

* tag 'for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (54 commits)
  power: supply: olpc_battery: force the le/be casts
  power: supply: ucs1002: Fix build error without CONFIG_REGULATOR
  power: supply: ucs1002: Fix wrong return value checking
  power: supply: Add driver for Microchip UCS1002
  dt-bindings: power: supply: Add bindings for Microchip UCS1002
  power: supply: core: Add POWER_SUPPLY_HEALTH_OVERCURRENT constant
  power: supply: core: fix clang -Wunsequenced
  power: supply: core: Add missing documentation for CHARGE_CONTROL_* properties
  power: supply: core: Add CHARGE_CONTROL_{START_THRESHOLD,END_THRESHOLD} properties
  power: supply: core: Add Standard, Adaptive, and Custom charge types
  power: supply: axp288_fuel_gauge: Add ACEPC T8 and T11 mini PCs to the blacklist
  power: supply: bq27xxx_battery: Notify also about status changes
  power: supply: olpc_battery: Have the framework register sysfs files for us
  power: supply: olpc_battery: Add OLPC XO 1.75 support
  power: supply: olpc_battery: Avoid using platform_info
  power: supply: olpc_battery: Use devm_power_supply_register()
  power: supply: olpc_battery: Move priv data to a struct
  power: supply: olpc_battery: Use DT to get battery version
  x86/platform/olpc: Use a correct version when making up a battery node
  x86/platform/olpc: Trivial code move in DT fixup
  ...
2019-05-15 18:50:40 -07:00
Linus Torvalds 5fd09ba682 xen: fixes and features for 5.2-rc1
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Merge tag 'for-linus-5.2b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:

 - some minor cleanups

 - two small corrections for Xen on ARM

 - two fixes for Xen PVH guest support

 - a patch for a new command line option to tune virtual timer handling

* tag 'for-linus-5.2b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/arm: Use p2m entry with lock protection
  xen/arm: Free p2m entry if fail to add it to RB tree
  xen/pvh: correctly setup the PV EFI interface for dom0
  xen/pvh: set xen_domain_type to HVM in xen_pvh_init
  xenbus: drop useless LIST_HEAD in xenbus_write_watch() and xenbus_file_write()
  xen-netfront: mark expected switch fall-through
  xen: xen-pciback: fix warning Using plain integer as NULL pointer
  x86/xen: Add "xen_timer_slop" command line option
2019-05-15 18:44:52 -07:00
Tony Luck 8a635ffb14 ia64: Make sure that we have a mmiowb function real early
Generic kernels feed many operation through the "machvec" logic to get
the correct form of the operation for the current system.  "mmiowb()" is
one of those operations.

Although machvec is initialized very early in boot, it isn't early
enough for a recent upstream kernel change that added mmiowb to the
spin_unlock() path.

Statically initialize the mmiowb field of machvec so that we won't die
with a call through a NULL pointer.  This should be safe because we do
the real initialization of machvec before bringing up any addtional CPUs
or doing any I/O.

Fixes: 49ca6462fc ("ia64/mmiowb: Add unconditional mmiowb() to arch_spin_unlock()")
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-15 18:43:46 -07:00
Linus Torvalds 700a800a94 This pull consists mostly of nfsd container work:
Scott Mayhew revived an old api that communicates with a userspace
 daemon to manage some on-disk state that's used to track clients across
 server reboots.  We've been using a usermode_helper upcall for that, but
 it's tough to run those with the right namespaces, so a daemon is much
 friendlier to container use cases.
 
 Trond fixed nfsd's handling of user credentials in user namespaces.  He
 also contributed patches that allow containers to support different sets
 of NFS protocol versions.
 
 The only remaining container bug I'm aware of is that the NFS reply
 cache is shared between all containers.  If anyone's aware of other gaps
 in our container support, let me know.
 
 The rest of this is miscellaneous bugfixes.
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Merge tag 'nfsd-5.2' of git://linux-nfs.org/~bfields/linux

Pull nfsd updates from Bruce Fields:
 "This consists mostly of nfsd container work:

  Scott Mayhew revived an old api that communicates with a userspace
  daemon to manage some on-disk state that's used to track clients
  across server reboots. We've been using a usermode_helper upcall for
  that, but it's tough to run those with the right namespaces, so a
  daemon is much friendlier to container use cases.

  Trond fixed nfsd's handling of user credentials in user namespaces. He
  also contributed patches that allow containers to support different
  sets of NFS protocol versions.

  The only remaining container bug I'm aware of is that the NFS reply
  cache is shared between all containers. If anyone's aware of other
  gaps in our container support, let me know.

  The rest of this is miscellaneous bugfixes"

* tag 'nfsd-5.2' of git://linux-nfs.org/~bfields/linux: (23 commits)
  nfsd: update callback done processing
  locks: move checks from locks_free_lock() to locks_release_private()
  nfsd: fh_drop_write in nfsd_unlink
  nfsd: allow fh_want_write to be called twice
  nfsd: knfsd must use the container user namespace
  SUNRPC: rsi_parse() should use the current user namespace
  SUNRPC: Fix the server AUTH_UNIX userspace mappings
  lockd: Pass the user cred from knfsd when starting the lockd server
  SUNRPC: Temporary sockets should inherit the cred from their parent
  SUNRPC: Cache the process user cred in the RPC server listener
  nfsd: Allow containers to set supported nfs versions
  nfsd: Add custom rpcbind callbacks for knfsd
  SUNRPC: Allow further customisation of RPC program registration
  SUNRPC: Clean up generic dispatcher code
  SUNRPC: Add a callback to initialise server requests
  SUNRPC/nfs: Fix return value for nfs4_callback_compound()
  nfsd: handle legacy client tracking records sent by nfsdcld
  nfsd: re-order client tracking method selection
  nfsd: keep a tally of RECLAIM_COMPLETE operations when using nfsdcld
  nfsd: un-deprecate nfsdcld
  ...
2019-05-15 18:21:43 -07:00
Dave Airlie 8da0e1525b - A couple new panfrost fixes
- Fix the low refresh rate register in adv7511
 - A handful of msm fixes that fell out of 5.1 bringup on SDM845
 - Fix spinlock initialization in pl111
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Merge tag 'drm-misc-next-fixes-2019-05-15' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

- A couple new panfrost fixes
- Fix the low refresh rate register in adv7511
- A handful of msm fixes that fell out of 5.1 bringup on SDM845
- Fix spinlock initialization in pl111

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20190515201729.GA89093@art_vandelay
2019-05-16 10:19:33 +10:00
Dave Airlie dc28d5742b Merge tag 'drm-intel-next-fixes-2019-05-15' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
- Disable framebuffer compression on Geminilake
- Fixes for HSW EDP fastset and a IRQ handler vs. RCU race

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190515074817.GA10472@jlahtine-desk.ger.corp.intel.com
2019-05-16 10:19:06 +10:00
Linus Torvalds b06ed1e7a2 Updates to ktest.pl
- Handle meta data in GRUB_MENU
 
  - Add variable to cusomize what return value the reboot code should return.
 
  - Add support for grub2bls boot loader
 
  - Show name and test iteration number in error message sent in mail
 
  - Minor fixes and clean ups
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Merge tag 'ktest-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest

Pull more ktest updates from Steven Rostedt:

 - Add support for grub2bls boot loader

 - Show name and test iteration number in error message sent in mail

 - Minor fixes and clean ups

* tag 'ktest-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest:
  ktest: update sample.conf for grub2bls
  ktest: remove get_grub2_index
  ktest: pass KERNEL_VERSION to POST_KTEST
  ktest: introduce grub2bls REBOOT_TYPE option
  ktest: cleanup get_grub_index
  ktest: introduce _get_grub_index
2019-05-15 16:46:32 -07:00
Linus Torvalds d2d8b14604 The major changes in this tracing update includes:
- Removing of non-DYNAMIC_FTRACE from 32bit x86
 
  - Removing of mcount support from x86
 
  - Emulating a call from int3 on x86_64, fixes live kernel patching
 
  - Consolidated Tracing Error logs file
 
 Minor updates:
 
  - Removal of klp_check_compiler_support()
 
  - kdb ftrace dumping output changes
 
  - Accessing and creating ftrace instances from inside the kernel
 
  - Clean up of #define if macro
 
  - Introduction of TRACE_EVENT_NOP() to disable trace events based on config
    options
 
 And other minor fixes and clean ups
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Merge tag 'trace-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "The major changes in this tracing update includes:

   - Removal of non-DYNAMIC_FTRACE from 32bit x86

   - Removal of mcount support from x86

   - Emulating a call from int3 on x86_64, fixes live kernel patching

   - Consolidated Tracing Error logs file

  Minor updates:

   - Removal of klp_check_compiler_support()

   - kdb ftrace dumping output changes

   - Accessing and creating ftrace instances from inside the kernel

   - Clean up of #define if macro

   - Introduction of TRACE_EVENT_NOP() to disable trace events based on
     config options

  And other minor fixes and clean ups"

* tag 'trace-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (44 commits)
  x86: Hide the int3_emulate_call/jmp functions from UML
  livepatch: Remove klp_check_compiler_support()
  ftrace/x86: Remove mcount support
  ftrace/x86_32: Remove support for non DYNAMIC_FTRACE
  tracing: Simplify "if" macro code
  tracing: Fix documentation about disabling options using trace_options
  tracing: Replace kzalloc with kcalloc
  tracing: Fix partial reading of trace event's id file
  tracing: Allow RCU to run between postponed startup tests
  tracing: Fix white space issues in parse_pred() function
  tracing: Eliminate const char[] auto variables
  ring-buffer: Fix mispelling of Calculate
  tracing: probeevent: Fix to make the type of $comm string
  tracing: probeevent: Do not accumulate on ret variable
  tracing: uprobes: Re-enable $comm support for uprobe events
  ftrace/x86_64: Emulate call function while updating in breakpoint handler
  x86_64: Allow breakpoints to emulate call instructions
  x86_64: Add gap to int3 to allow for call emulation
  tracing: kdb: Allow ftdump to skip all but the last few entries
  tracing: Add trace_total_entries() / trace_total_entries_cpu()
  ...
2019-05-15 16:05:47 -07:00
Russell King b752bb405a Revert "ARM: 8846/1: warn if divided syntax assembler is used"
This reverts commit e8c24bbda7.

GCC 4.7, which is still permitted, emits code using the original
syntax.  This means we end up with lots of assembler warnings when
building with a currently-supported version of gcc.

Revert the commit (with fixups to keep the follow-on -mauto-it
change) to avoid these warnings.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2019-05-15 23:17:17 +01:00
Paolo Bonzini dd53f6102c KVM/arm updates for 5.2
- guest SVE support
 - guest Pointer Authentication support
 - Better discrimination of perf counters between host and guests
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Merge tag 'kvmarm-for-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm updates for 5.2

- guest SVE support
- guest Pointer Authentication support
- Better discrimination of perf counters between host and guests

Conflicts:
	include/uapi/linux/kvm.h
2019-05-15 23:41:43 +02:00
Paolo Bonzini 59c5c58c5b Second PPC KVM update for 5.2
- Fix a bug, fix a spelling mistake, remove some useless code.
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Merge tag 'kvm-ppc-next-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD

PPC KVM update for 5.2

* Support for guests to access the new POWER9 XIVE interrupt controller
  hardware directly, reducing interrupt latency and overhead for guests.

* In-kernel implementation of the H_PAGE_INIT hypercall.

* Reduce memory usage of sparsely-populated IOMMU tables.

* Several bug fixes.

Second PPC KVM update for 5.2

* Fix a bug, fix a spelling mistake, remove some useless code.
2019-05-15 23:39:38 +02:00
Manuel Lauss b1e479e3dc
MIPS: Alchemy: add DMA masks for on-chip ethernet
Makes au1000-eth work again, tested on DB1500.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
2019-05-15 14:29:29 -07:00