Clean up. Trond points out that xdr_stream_decode_uint32_array()
does the same thing as nfsd4_decode_bitmap4().
Suggested-by: Trond Myklebust <trondmy@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
The use of the bitmaps is confusing. Add a cross-reference to make it
easier to find the existing comment. Add an updated reference with URL
to make it quicker to look up. And a bit more editorializing about the
value of this.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Clean up: The garbage_args and cant_encode tracepoints report the
same information as each other, so combine them into a single
tracepoint class to reduce code duplication and slightly reduce the
size of trace.o.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
I'm about to add more information to the server-side SUNRPC
tracepoints, so I'm going to offset the increased trace log
consumption by getting rid of some tracepoints that fire frequently
but don't offer much value.
trace_svc_xprt_received() was useful for debugging, perhaps, but
is not generally informative.
trace_svc_handle_xprt() reports largely the same information as
trace_svc_xdr_recvfrom().
As a clean-up, rename trace_svc_xprt_do_enqueue() to match
svc_xprt_dequeue().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
We currently have a 'laundrette' for closing cached files - a different
work-item for each network-namespace.
These 'laundrettes' (aka struct nfsd_fcache_disposal) are currently on a
list, and are freed using rcu.
The list is not necessary as we have a per-namespace structure (struct
nfsd_net) which can hold a link to the nfsd_fcache_disposal.
The use of kfree_rcu is also unnecessary as the cache is cleaned of all
files associated with a given namespace, and no new files can be added,
before the nfsd_fcache_disposal is freed.
So add a '->fcache_disposal' link to nfsd_net, and discard the list
management and rcu usage.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Commit 7142b98d9f ("nfsd: Clean up drc cache in preparation for
global spinlock elimination"), billed as a clean-up, added
be32_to_cpu() to the DRC hash function without explanation. That
commit removed two comments that state that byte-swapping in the
hash function is unnecessary without explaining whether there was
a need for that change.
On some Intel CPUs, the swab32 instruction is known to cause a CPU
pipeline stall. be32_to_cpu() does not add extra randomness, since
the hash multiplication is done /before/ shifting to the high-order
bits of the result.
As a micro-optimization, remove the unnecessary transform from the
DRC hash function.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Now that thread management is consistent there is no need for
nfs-callback to use svc_create_pooled() as introduced in Commit
df807fffaa ("NFSv4.x/callback: Create the callback service through
svc_create_pooled"). So switch back to svc_create().
If service pools were configured, but the number of threads were left at
'1', nfs callback may not work reliably when svc_create_pooled() is used.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
svc_set_num_threads() does everything that lockd_start_svc() does, except
set sv_maxconn. It also (when passed 0) finds the threads and
stops them with kthread_stop().
So move the setting for sv_maxconn, and use svc_set_num_thread()
We now don't need nlmsvc_task.
Now that we use svc_set_num_threads() it makes sense to set svo_module.
This request that the thread exists with module_put_and_exit().
Also fix the documentation for svo_module to make this explicit.
svc_prepare_thread is now only used where it is defined, so it can be
made static.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Currently 'pooled' services hold a reference on the pool_map, and
'unpooled' services do not.
svc_destroy() uses the presence of ->svo_function (via
svc_serv_is_pooled()) to determine if the reference should be dropped.
There is no direct correlation between being pooled and the use of
svo_function, though in practice, lockd is the only non-pooled service,
and the only one not to use svo_function.
This is untidy and would cause problems if we changed lockd to use
svc_set_num_threads(), which requires the use of ->svo_function.
So change the test for "is the service pooled" to "is sv_nrpools > 1".
This means that when svc_pool_map_get() returns 1, it must NOT take a
reference to the pool.
We discard svc_serv_is_pooled(), and test sv_nrpools directly.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
These definitions are not used outside of svc.c, and there is no
evidence that they ever have been. So move them into svc.c
and make the declarations 'static'.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
lockd_create_svc() already does an svc_get() if the service already
exists, so it is more like a "get" than a "create".
So:
- Move the increment of nlmsvc_users into the function as well
- rename to lockd_get().
It is now the inverse of lockd_put().
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
There is some cleanup that is duplicated in lockd_down() and the failure
path of lockd_up().
Factor these out into a new lockd_put() and call it from both places.
lockd_put() does *not* take the mutex - that must be held by the caller.
It decrements nlmsvc_users and if that reaches zero, it cleans up.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
The normal place to call svc_exit_thread() is from the thread itself
just before it exists.
Do this for lockd.
This means that nlmsvc_rqst is not used out side of lockd_start_svc(),
so it can be made local to that function, and renamed to 'rqst'.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
lockd_start_svc() only needs to be called once, just after the svc is
created. If the start fails, the svc is discarded too.
It thus makes sense to call lockd_start_svc() from lockd_create_svc().
This allows us to remove the test against nlmsvc_rqst at the start of
lockd_start_svc() - it must always be NULL.
lockd_up() only held an extra reference on the svc until a thread was
created - then it dropped it. The thread - and thus the extra reference
- will remain until kthread_stop() is called.
Now that the thread is created in lockd_create_svc(), the extra
reference can be dropped there. So the 'serv' variable is no longer
needed in lockd_up().
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Now that the network status notifiers use nlmsvc_serv rather then
nlmsvc_rqst the management can be simplified.
Notifier unregistration synchronises with any pending notifications so
providing we unregister before nlm_serv is freed no further interlock
is required.
So we move the unregister call to just before the thread is killed
(which destroys the service) and just before the service is destroyed in
the failure-path of lockd_up().
Then nlm_ntf_refcnt and nlm_ntf_wq can be removed.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
lockd has two globals - nlmsvc_task and nlmsvc_rqst - but mostly it
wants the 'struct svc_serv', and when it doesn't want it exactly it can
get to what it wants from the serv.
This patch is a first step to removing nlmsvc_task and nlmsvc_rqst. It
introduces nlmsvc_serv to store the 'struct svc_serv*'. This is set as
soon as the serv is created, and cleared only when it is destroyed.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
nfsd currently maintains an open-coded read/write semaphore (refcount
and wait queue) for each network namespace to ensure the nfs service
isn't shut down while the notifier is running.
This is excessive. As there is unlikely to be contention between
notifiers and they run without sleeping, a single spinlock is sufficient
to avoid problems.
Signed-off-by: NeilBrown <neilb@suse.de>
[ cel: ensure nfsd_notifier_lock is static ]
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
The ->svo_setup callback serves no purpose. It is always called from
within the same module that chooses which callback is needed. So
discard it and call the relevant function directly.
Now that svc_set_num_threads() is no longer used remove it and rename
svc_set_num_threads_sync() to remove the "_sync" suffix.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
nfsd cannot currently use svc_set_num_threads_sync. It instead
uses svc_set_num_threads which does *not* wait for threads to all
exit, and has a separate mechanism (nfsd_shutdown_complete) to wait
for completion.
The reason that nfsd is unlike other services is that nfsd threads can
exit separately from svc_set_num_threads being called - they die on
receipt of SIGKILL. Also, when the last thread exits, the service must
be shut down (sockets closed).
For this, the nfsd_mutex needs to be taken, and as that mutex needs to
be held while svc_set_num_threads is called, the one cannot wait for
the other.
This patch changes the nfsd thread so that it can drop the ref on the
service without blocking on nfsd_mutex, so that svc_set_num_threads_sync
can be used:
- if it can drop a non-last reference, it does that. This does not
trigger shutdown and does not require a mutex. This will likely
happen for all but the last thread signalled, and for all threads
being shut down by nfsd_shutdown_threads()
- if it can get the mutex without blocking (trylock), it does that
and then drops the reference. This will likely happen for the
last thread killed by SIGKILL
- Otherwise there might be an unrelated task holding the mutex,
possibly in another network namespace, or nfsd_shutdown_threads()
might be just about to get a reference on the service, after which
we can drop ours safely.
We cannot conveniently get wakeup notifications on these events,
and we are unlikely to need to, so we sleep briefly and check again.
With this we can discard nfsd_shutdown_complete and
nfsd_complete_shutdown(), and switch to svc_set_num_threads_sync.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
There is nothing happening in the start of nfsd() that requires
protection by the mutex, so don't take it until shutting down the thread
- which does still require protection - but only for nfsd_put().
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Using sv_lock means we don't need to hold the service mutex over these
updates.
In particular, svc_exit_thread() no longer requires synchronisation, so
threads can exit asynchronously.
Note that we could use an atomic_t, but as there are many more read
sites than writes, that would add unnecessary noise to the code.
Some reads are already racy, and there is no need for them to not be.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This allows us to move the updates for th_cnt out of the mutex.
This is a step towards reducing mutex coverage in nfsd().
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
The use of sv_nrthreads as a general refcount results in clumsy code, as
is seen by various comments needed to explain the situation.
This patch introduces a 'struct kref' and uses that for reference
counting, leaving sv_nrthreads to be a pure count of threads. The kref
is managed particularly in svc_get() and svc_put(), and also nfsd_put();
svc_destroy() now takes a pointer to the embedded kref, rather than to
the serv.
nfsd allows the svc_serv to exist with ->sv_nrhtreads being zero. This
happens when a transport is created before the first thread is started.
To support this, a 'keep_active' flag is introduced which holds a ref on
the svc_serv. This is set when any listening socket is successfully
added (unless there are running threads), and cleared when the number of
threads is set. So when the last thread exits, the nfs_serv will be
destroyed.
The use of 'keep_active' replaces previous code which checked if there
were any permanent sockets.
We no longer clear ->rq_server when nfsd() exits. This was done
to prevent svc_exit_thread() from calling svc_destroy().
Instead we take an extra reference to the svc_serv to prevent
svc_destroy() from being called.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
svc_destroy() is poorly named - it doesn't necessarily destroy the svc,
it might just reduce the ref count.
nfsd_destroy() is poorly named for the same reason.
This patch:
- removes the refcount functionality from svc_destroy(), moving it to
a new svc_put(). Almost all previous callers of svc_destroy() now
call svc_put().
- renames nfsd_destroy() to nfsd_put() and improves the code, using
the new svc_destroy() rather than svc_put()
- removes a few comments that explain the important for balanced
get/put calls. This should be obvious.
The only non-trivial part of this is that svc_destroy() would call
svc_sock_update() on a non-final decrement. It can no longer do that,
and svc_put() isn't really a good place of it. This call is now made
from svc_exit_thread() which seems like a good place. This makes the
call *before* sv_nrthreads is decremented rather than after. This
is not particularly important as the call just sets a flag which
causes sv_nrthreads set be checked later. A subsequent patch will
improve the ordering.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
It is common for 'get' functions to return the object that was 'got',
and there are a couple of places where users of svc_get() would be a
little simpler if svc_get() did that.
Make it so.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
If write_ports_add() fails, we shouldn't destroy the serv, unless we had
only just created it. So if there are any permanent sockets already
attached, leave the serv in place.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
/home/cel/src/linux/linux/fs/nfsd/nfs4proc.c:1539:24: warning: incorrect type in assignment (different base types)
/home/cel/src/linux/linux/fs/nfsd/nfs4proc.c:1539:24: expected restricted __be32 [usertype] status
/home/cel/src/linux/linux/fs/nfsd/nfs4proc.c:1539:24: got int
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Here are some small USB fixes for 5.16-rc5. They include:
- gadget driver fixes for reported issues
- xhci fixes for reported problems.
- config endpoint parsing fixes for where we got bitfields wrong
Most of these have been in linux-next, the remaining few were not, but
got lots of local testing in my systems and in some cloud testing
infrastructures.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB fixes for 5.16-rc5. They include:
- gadget driver fixes for reported issues
- xhci fixes for reported problems.
- config endpoint parsing fixes for where we got bitfields wrong
Most of these have been in linux-next, the remaining few were not, but
got lots of local testing in my systems and in some cloud testing
infrastructures"
* tag 'usb-5.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: core: config: using bit mask instead of individual bits
usb: core: config: fix validation of wMaxPacketValue entries
USB: gadget: zero allocate endpoint 0 buffers
USB: gadget: detect too-big endpoint 0 requests
xhci: avoid race between disable slot command and host runtime suspend
xhci: Remove CONFIG_USB_DEFAULT_PERSIST to prevent xHCI from runtime suspending
Revert "usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default"
Here are a bunch of small char/misc and other driver subsystem fixes for
5.16-rc5
Included in here are:
- iio driver fixes for reported problems.
- phy driver fixes for a number of reported problems.
- mhi resume bugfix for broken hardware
- nvmem driver fix
- rtsx driver fix for irq issues
- fastrpc packet parsing fix
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are a bunch of small char/misc and other driver subsystem fixes.
Included in here are:
- iio driver fixes for reported problems
- phy driver fixes for a number of reported problems
- mhi resume bugfix for broken hardware
- nvmem driver fix
- rtsx driver fix for irq issues
- fastrpc packet parsing fix
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-5.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (33 commits)
bus: mhi: core: Add support for forced PM resume
iio: trigger: stm32-timer: fix MODULE_ALIAS
misc: rtsx: Avoid mangling IRQ during runtime PM
nvmem: eeprom: at25: fix FRAM byte_len
misc: fastrpc: fix improper packet size calculation
MAINTAINERS: add maintainer for Qualcomm FastRPC driver
bus: mhi: pci_generic: Fix device recovery failed issue
iio: adc: stm32: fix null pointer on defer_probe error
phy: HiSilicon: Fix copy and paste bug in error handling
dt-bindings: phy: zynqmp-psgtr: fix USB phy name
phy: ti: omap-usb2: Fix the kernel-doc style
phy: qualcomm: ipq806x-usb: Fix kernel-doc style
iio: at91-sama5d2: Fix incorrect sign extension
iio: adc: axp20x_adc: fix charging current reporting on AXP22x
iio: gyro: adxrs290: fix data signedness
phy: ti: tusb1210: Fix the kernel-doc warn
phy: qualcomm: usb-hsic: Fix the kernel-doc warn
phy: qualcomm: qmp: Add missing struct documentation
phy: mvebu-cp110-utmi: Fix kernel-doc warns
iio: ad7768-1: Call iio_trigger_notify_done() on error
...
- A regression fix for the Designware APB timer. A recent change to the
error checking code transformed the error condition wrongly so it
turned into a fail if good condition.
- Fix a clang build fail of the ARM architected timer driver.
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Merge tag 'timers-urgent-2021-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"Two fixes for clock chip drivers:
- A regression fix for the Designware APB timer. A recent change to
the error checking code transformed the error condition wrongly so
it turned into a fail if good condition.
- Fix a clang build fail of the ARM architected timer driver"
* tag 'timers-urgent-2021-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource/drivers/arm_arch_timer: Force inlining of erratum_set_next_event_generic()
clocksource/drivers/dw_apb_timer_of: Fix probe failure
- Fix the multi vector MSI allocation on Armada 370XP.
- Do interrupt acknowledgement correctly in the aspeed-scu driver.
- Make the IPR register offset correct in the NVIC driver.
- Make redistribution table flushing correct by issueing a SYNC command to
ensure that the invalidation command has been executed.
- Plug a device tree node reference leak in the bcm7210-l2 driver.
- Trivial fixes in the MIPS GIC and the Apple AIC drivers
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Merge tag 'irq-urgent-2021-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"A set of interrupt chip driver fixes:
- Fix the multi vector MSI allocation on Armada 370XP
- Do interrupt acknowledgement correctly in the aspeed-scu driver
- Make the IPR register offset correct in the NVIC driver
- Make redistribution table flushing correct by issueing a SYNC
command to ensure that the invalidation command has been executed
- Plug a device tree node reference leak in the bcm7210-l2 driver
- Trivial fixes in the MIPS GIC and the Apple AIC drivers"
* tag 'irq-urgent-2021-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/irq-bcm7120-l2: Add put_device() after of_find_device_by_node()
irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL
irqchip/apple-aic: Mark aic_init_smp() as __init
irqchip: nvic: Fix offset for Interrupt Priority Offsets
irqchip/mips-gic: Use bitfield helpers
irqchip/aspeed-scu: Replace update_bits with write_bits.
irqchip/armada-370-xp: Fix support for Multi-MSI interrupts
irqchip/armada-370-xp: Fix return value of armada_370_xp_msi_alloc()
Using cluster topology on hybrid CPUs, e.g. Alder Lake, biases the
scheduler towards the ATOM cluster as that has more total capacity.
Use selection based on CPU priority instead.
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Merge tag 'sched-urgent-2021-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Thomas Gleixner:
"A single fix for the x86 scheduler topology:
Using cluster topology on hybrid CPUs, e.g. Alder Lake, biases the
scheduler towards the ATOM cluster as that has more total capacity.
Use selection based on CPU priority instead"
* tag 'sched-urgent-2021-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched,x86: Don't use cluster topology for x86 hybrid CPUs
Using standard USB_EP_MAXP_MULT_MASK instead of individual bits for
extracting multiple-transactions bits from wMaxPacketSize value.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211210085219.16796-2-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The checks performed by commit aed9d65ac3 ("USB: validate
wMaxPacketValue entries in endpoint descriptors") require that initial
value of the maxp variable contains both maximum packet size bits
(10..0) and multiple-transactions bits (12..11). However, the existing
code assings only the maximum packet size bits. This patch assigns all
bits of wMaxPacketSize to the variable.
Fixes: aed9d65ac3 ("USB: validate wMaxPacketValue entries in endpoint descriptors")
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211210085219.16796-1-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Under some conditions, USB gadget devices can show allocated buffer
contents to a host. Fix this up by zero-allocating them so that any
extra data will all just be zeros.
Reported-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Tested-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sometimes USB hosts can ask for buffers that are too large from endpoint
0, which should not be allowed. If this happens for OUT requests, stall
the endpoint, but for IN requests, trim the request size to the endpoint
buffer size.
Co-developed-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Four fixes, all in drivers. Three are small and obvious, the qedi one
is a bit larger but also pretty obvious.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Four fixes, all in drivers.
Three are small and obvious, the qedi one is a bit larger but also
pretty obvious"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: qla2xxx: Format log strings only if needed
scsi: scsi_debug: Fix buffer size of REPORT ZONES command
scsi: qedi: Fix cmd_cleanup_cmpl counter mismatch issue
scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc()
- Fix a data corruption vector that can result from the ro remount
process failing to clear all speculative preallocations from files
and the rw remount process not noticing the incomplete cleanup.
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Merge tag 'xfs-5.16-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fix from Darrick Wong:
"This fixes a race between a readonly remount process and other
processes that hold a file IOLOCK on files that previously experienced
copy on write, that could result in severe filesystem corruption if
the filesystem is then remounted rw.
I think this is fairly rare (since the only reliable reproducer I have
that fits the second criteria is the experimental xfs_scrub program),
but the race is clear, so we still need to fix this.
Summary:
- Fix a data corruption vector that can result from the ro remount
process failing to clear all speculative preallocations from files
and the rw remount process not noticing the incomplete cleanup"
* tag 'xfs-5.16-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: remove all COW fork extents when remounting readonly
Pull percpu fixes from Dennis Zhou:
"This contains a fix for SMP && !MMU archs for percpu which has been
tested by arm and sh. It seems in the past they have gotten away with
it due to mapping of vm functions to km functions, but this fell apart
a few releases ago and was just reported recently.
The other is just a minor dependency clean up.
I think queued up right now by Andrew is a fix in percpu that papers
of what seems to be a bug in hotplug for a special situation with
memoryless nodes. Michal Hocko is digging into it further"
* 'for-5.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
percpu_ref: Replace kernel.h with the necessary inclusions
percpu: km: ensure it is used with NOMMU (either UP or SMP)
- Prevent out-of-bounds access to per sample registers.
- Fix NULL vs IS_ERR_OR_NULL() checking on the python binding.
- Intel PT fixes, half of those are one-liners:
- Fix some PGE (packet generation enable/control flow packets) usage.
- Fix sync state when a PSB (synchronization) packet is found.
- Fix intel_pt_fup_event() assumptions about setting state type.
- Fix state setting when receiving overflow (OVF) packet.
- Fix next 'err' value, walking trace.
- Fix missing 'instruction' events with 'q' option.
- Fix error timestamp setting on the decoder error path.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-tools-fixes-for-v5.16-2021-12-11' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
Pull perf tools fixes from Arnaldo Carvalho de Melo:
- Prevent out-of-bounds access to per sample registers.
- Fix NULL vs IS_ERR_OR_NULL() checking on the python binding.
- Intel PT fixes, half of those are one-liners:
- Fix some PGE (packet generation enable/control flow packets) usage.
- Fix sync state when a PSB (synchronization) packet is found.
- Fix intel_pt_fup_event() assumptions about setting state type.
- Fix state setting when receiving overflow (OVF) packet.
- Fix next 'err' value, walking trace.
- Fix missing 'instruction' events with 'q' option.
- Fix error timestamp setting on the decoder error path.
* tag 'perf-tools-fixes-for-v5.16-2021-12-11' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
perf python: Fix NULL vs IS_ERR_OR_NULL() checking
perf intel-pt: Fix error timestamp setting on the decoder error path
perf intel-pt: Fix missing 'instruction' events with 'q' option
perf intel-pt: Fix next 'err' value, walking trace
perf intel-pt: Fix state setting when receiving overflow (OVF) packet
perf intel-pt: Fix intel_pt_fup_event() assumptions about setting state type
perf intel-pt: Fix sync state when a PSB (synchronization) packet is found
perf intel-pt: Fix some PGE (packet generation enable/control flow packets) usage
perf tools: Prevent out-of-bounds access to registers
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Merge tag 'block-5.16-2021-12-10' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"A few block fixes that should go into this release:
- NVMe pull request:
- set ana_log_size to 0 after freeing ana_log_buf (Hou Tao)
- show subsys nqn for duplicate cntlids (Keith Busch)
- disable namespace access for unsupported metadata (Keith
Busch)
- report write pointer for a full zone as zone start + zone len
(Niklas Cassel)
- fix use after free when disconnecting a reconnecting ctrl
(Ruozhu Li)
- fix a list corruption in nvmet-tcp (Sagi Grimberg)
- Fix for a regression on DIO single bio async IO (Pavel)
- ioprio seteuid fix (Davidlohr)
- mtd fix that subsequently got reverted as it was broken, will get
re-done and submitted for the next round
- Two MD fixes via Song (Markus, zhangyue)"
* tag 'block-5.16-2021-12-10' of git://git.kernel.dk/linux-block:
Revert "mtd_blkdevs: don't scan partitions for plain mtdblock"
block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)
md: fix double free of mddev->private in autorun_array()
md: fix update super 1.0 on rdev size change
nvmet-tcp: fix possible list corruption for unexpected command failure
block: fix single bio async DIO error handling
nvme: fix use after free when disconnecting a reconnecting ctrl
nvme-multipath: set ana_log_size to 0 after free ana_log_buf
mtd_blkdevs: don't scan partitions for plain mtdblock
nvme: report write pointer for a full zone as zone start + zone len
nvme: disable namespace access for unsupported metadata
nvme: show subsys nqn for duplicate cntlids
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Merge tag 'io_uring-5.16-2021-12-10' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"A few fixes that are all bound for stable:
- Two syzbot reports for io-wq that turned out to be separate fixes,
but ultimately very closely related
- io_uring task_work running on cancelations"
* tag 'io_uring-5.16-2021-12-10' of git://git.kernel.dk/linux-block:
io-wq: check for wq exit after adding new worker task_work
io_uring: ensure task_work gets run as part of cancelations
io-wq: remove spurious bit clear on task_work addition
- Fix qcom mux logic to look at the proper parent table member.
Luckily this clk type isn't very common.
- Don't kill clks on qcom systems that use Trion PLLs that are
enabled out of the bootloader. We will simply skip programming
the PLL rate if it's already done.
- Use the proper clk_ops for the qcom sm6125 ICE clks.
- Use module_platform_driver() in i.MX as it can be a module.
- Fix a UAF in the versatile clk driver on an error path.
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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk driver fixes from Stephen Boyd:
- Fix qcom mux logic to look at the proper parent table member. Luckily
this clk type isn't very common.
- Don't kill clks on qcom systems that use Trion PLLs that are enabled
out of the bootloader. We will simply skip programming the PLL rate
if it's already done.
- Use the proper clk_ops for the qcom sm6125 ICE clks.
- Use module_platform_driver() in i.MX as it can be a module.
- Fix a UAF in the versatile clk driver on an error path.
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: versatile: clk-icst: use after free on error path
clk: qcom: sm6125-gcc: Swap ops of ice and apps on sdcc1
clk: imx: use module_platform_driver
clk: qcom: clk-alpha-pll: Don't reconfigure running Trion
clk: qcom: regmap-mux: fix parent clock lookup
- Revert schema checks on %.dtb targets. This was problematic for some
external build tools.
- A few DT binding example fixes
- Add back dropped 'enet-phy-lane-no-swap' Ethernet PHY property
- Drop erroneous if/then schema in nxp,imx7-mipi-csi2
- Add a quirk to fix some interrupt controllers use of 'interrupt-map'
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Merge tag 'devicetree-fixes-for-5.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree fixes from Rob Herring:
- Revert schema checks on %.dtb targets. This was problematic for some
external build tools.
- A few DT binding example fixes
- Add back dropped 'enet-phy-lane-no-swap' Ethernet PHY property
- Drop erroneous if/then schema in nxp,imx7-mipi-csi2
- Add a quirk to fix some interrupt controllers use of 'interrupt-map'
* tag 'devicetree-fixes-for-5.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
Revert "kbuild: Enable DT schema checks for %.dtb targets"
dt-bindings: bq25980: Fixup the example
dt-bindings: input: gpio-keys: Fix interrupts in example
dt-bindings: net: Reintroduce PHY no lane swap binding
dt-bindings: media: nxp,imx7-mipi-csi2: Drop bad if/then schema
of/irq: Add a quirk for controllers with their own definition of interrupt-map
dt-bindings: iio: adc: exynos-adc: Fix node name in example
Merge misc fixes from Andrew Morton:
"21 patches.
Subsystems affected by this patch series: MAINTAINERS, mailmap, and mm
(mlock, pagecache, damon, slub, memcg, hugetlb, and pagecache)"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (21 commits)
mm: bdi: initialize bdi_min_ratio when bdi is unregistered
hugetlbfs: fix issue of preallocation of gigantic pages can't work
mm/memcg: relocate mod_objcg_mlstate(), get_obj_stock() and put_obj_stock()
mm/slub: fix endianness bug for alloc/free_traces attributes
selftests/damon: split test cases
selftests/damon: test debugfs file reads/writes with huge count
selftests/damon: test wrong DAMOS condition ranges input
selftests/damon: test DAMON enabling with empty target_ids case
selftests/damon: skip test if DAMON is running
mm/damon/vaddr-test: remove unnecessary variables
mm/damon/vaddr-test: split a test function having >1024 bytes frame size
mm/damon/vaddr: remove an unnecessary warning message
mm/damon/core: remove unnecessary error messages
mm/damon/dbgfs: remove an unnecessary error message
mm/damon/core: use better timer mechanisms selection threshold
mm/damon/core: fix fake load reports due to uninterruptible sleeps
timers: implement usleep_idle_range()
filemap: remove PageHWPoison check from next_uptodate_page()
mailmap: update email address for Guo Ren
MAINTAINERS: update kdump maintainers
...
arm64 architected timer by inlining the
erratum_set_next_event_generic() function (Marc Zyngier)
- Fix probe error on the dw_apb_timer_of driver by fixing the
incorrect condition previously introduced (Alexey Sheplyakov)
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Merge tag 'timers-v5.16-rc4' of https://git.linaro.org/people/daniel.lezcano/linux into timers/urgent
Pull timer fixes from Daniel Lezcano:
- Fix build error with clang and some kernel configuration on the
arm64 architected timer by inlining the
erratum_set_next_event_generic() function (Marc Zyngier)
- Fix probe error on the dw_apb_timer_of driver by fixing the
incorrect condition previously introduced (Alexey Sheplyakov)
Link: https://lore.kernel.org/r/429b796d-9395-4ca8-81f3-30911f80a9a9@linaro.org
Chuck Lever