Граф коммитов

997149 Коммитов

Автор SHA1 Сообщение Дата
Chuck Lever d9014b0f8f NFSD: Update the NFSv2 READLINK result encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:58 -04:00
Chuck Lever e3b4ef221a NFSD: Update the NFSv2 diropres encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:57 -04:00
Chuck Lever 92b54a4fa4 NFSD: Update the NFSv2 attrstat encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:57 -04:00
Chuck Lever a887eaed2a NFSD: Update the NFSv2 stat encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:57 -04:00
Chuck Lever 76ed0dd96e NFSD: Reduce svc_rqst::rq_pages churn during READDIR operations
During NFSv2 and NFSv3 READDIR/PLUS operations, NFSD advances
rq_next_page to the full size of the client-requested buffer, then
releases all those pages at the end of the request. The next request
to use that nfsd thread has to refill the pages.

NFSD does this even when the dirlist in the reply is small. With
NFSv3 clients that send READDIR operations with large buffer sizes,
that can be 256 put_page/alloc_page pairs per READDIR request, even
though those pages often remain unused.

We can save some work by not releasing dirlist buffer pages that
were not used to form the READDIR Reply. I've left the NFSv2 code
alone since there are never more than three pages involved in an
NFSv2 READDIR Reply.

Eventually we should nail down why these pages need to be released
at all in order to avoid allocating and releasing pages
unnecessarily.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:56 -04:00
Chuck Lever 1411934627 NFSD: Remove unused NFSv3 directory entry encoders
Clean up.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:56 -04:00
Chuck Lever 7f87fc2d34 NFSD: Update NFSv3 READDIR entry encoders to use struct xdr_stream
The benefit of the xdr_stream helpers is that they transparently
handle encoding an XDR data item that crosses page boundaries.
Most of the open-coded logic to do that here can be eliminated.

A sub-buffer and sub-stream are set up as a sink buffer for the
directory entry encoder. As an entry is encoded, it is added to
the end of the content in this buffer/stream. The total length of
the directory list is tracked in the buffer's @len field.

When it comes time to encode the Reply, the sub-buffer is merged
into rq_res's page array at the correct place using
xdr_write_pages().

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:56 -04:00
Chuck Lever e4ccfe3014 NFSD: Update the NFSv3 READDIR3res encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:56 -04:00
Chuck Lever a1409e2de4 NFSD: Count bytes instead of pages in the NFSv3 READDIR encoder
Clean up: Counting the bytes used by each returned directory entry
seems less brittle to me than trying to measure consumed pages after
the fact.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:55 -04:00
Chuck Lever a161e6c76a NFSD: Add a helper that encodes NFSv3 directory offset cookies
Refactor: De-duplicate identical code that handles encoding of
directory offset cookies across page boundaries.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:55 -04:00
Chuck Lever 5ef2826c76 NFSD: Update the NFSv3 COMMIT3res encoder to use struct xdr_stream
As an additional clean up, encode_wcc_data() is removed because it
is now no longer used.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:55 -04:00
Chuck Lever ded04a587f NFSD: Update the NFSv3 PATHCONF3res encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:55 -04:00
Chuck Lever 0a139d1b7f NFSD: Update the NFSv3 FSINFO3res encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:54 -04:00
Chuck Lever 8b7044984f NFSD: Update the NFSv3 FSSTAT3res encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:54 -04:00
Chuck Lever 4d74380a44 NFSD: Update the NFSv3 LINK3res encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:54 -04:00
Chuck Lever 89d79e9672 NFSD: Update the NFSv3 RENAMEv3res encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:54 -04:00
Chuck Lever 78315b3678 NFSD: Update the NFSv3 CREATE family of encoders to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:53 -04:00
Chuck Lever ecb7a085ac NFSD: Update the NFSv3 WRITE3res encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:53 -04:00
Chuck Lever cc9bcdad77 NFSD: Update the NFSv3 READ3res encode to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:53 -04:00
Chuck Lever 9a9c8923b3 NFSD: Update the NFSv3 READLINK3res encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:52 -04:00
Chuck Lever 70f8e83985 NFSD: Update the NFSv3 wccstat result encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:52 -04:00
Chuck Lever 5cf353354a NFSD: Update the NFSv3 LOOKUP3res encoder to use struct xdr_stream
Also, clean up: Rename the encoder function to match the name of
the result structure in RFC 1813, consistent with other encoder
function names in nfs3xdr.c. "diropres" is an NFSv2 thingie.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:52 -04:00
Chuck Lever 907c38227f NFSD: Update the NFSv3 ACCESS3res encoder to use struct xdr_stream
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:52 -04:00
Chuck Lever 2c42f804d3 NFSD: Update the GETATTR3res encoder to use struct xdr_stream
As an additional clean up, some renaming is done to more closely
reflect the data type and variable names used in the NFSv3 XDR
definition provided in RFC 1813. "attrstat" is an NFSv2 thingie.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:51 -04:00
Chuck Lever bddfdbcddb NFSD: Extract the svcxdr_init_encode() helper
NFSD initializes an encode xdr_stream only after the RPC layer has
already inserted the RPC Reply header. Thus it behaves differently
than xdr_init_encode does, which assumes the passed-in xdr_buf is
entirely devoid of content.

nfs4proc.c has this server-side stream initialization helper, but
it is visible only to the NFSv4 code. Move this helper to a place
that can be accessed by NFSv2 and NFSv3 server XDR functions.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2021-03-22 10:18:51 -04:00
Linus Torvalds 0d02ec6b31 Linux 5.12-rc4 2021-03-21 14:56:43 -07:00
Linus Torvalds d7f5f1bd3c Miscellaneous ext4 bug fixes for v5.12.
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Miscellaneous ext4 bug fixes for v5.12"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: initialize ret to suppress smatch warning
  ext4: stop inode update before return
  ext4: fix rename whiteout with fast commit
  ext4: fix timer use-after-free on failed mount
  ext4: fix potential error in ext4_do_update_inode
  ext4: do not try to set xattr into ea_inode if value is empty
  ext4: do not iput inode under running transaction in ext4_rename()
  ext4: find old entry again if failed to rename whiteout
  ext4: fix error handling in ext4_end_enable_verity()
  ext4: fix bh ref count on error paths
  fs/ext4: fix integer overflow in s_log_groups_per_flex
  ext4: add reclaim checks to xattr code
  ext4: shrink race window in ext4_should_retry_alloc()
2021-03-21 14:06:10 -07:00
Linus Torvalds 2c41fab1c6 io_uring-5.12-2021-03-21
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Merge tag 'io_uring-5.12-2021-03-21' of git://git.kernel.dk/linux-block

Pull io_uring followup fixes from Jens Axboe:

 - The SIGSTOP change from Eric, so we properly ignore that for
   PF_IO_WORKER threads.

 - Disallow sending signals to PF_IO_WORKER threads in general, we're
   not interested in having them funnel back to the io_uring owning
   task.

 - Stable fix from Stefan, ensuring we properly break links for short
   send/sendmsg recv/recvmsg if MSG_WAITALL is set.

 - Catch and loop when needing to run task_work before a PF_IO_WORKER
   threads goes to sleep.

* tag 'io_uring-5.12-2021-03-21' of git://git.kernel.dk/linux-block:
  io_uring: call req_set_fail_links() on short send[msg]()/recv[msg]() with MSG_WAITALL
  io-wq: ensure task is running before processing task_work
  signal: don't allow STOP on PF_IO_WORKER threads
  signal: don't allow sending any signals to PF_IO_WORKER threads
2021-03-21 12:25:54 -07:00
Linus Torvalds 1d4345eb51 Staging/IIO driver fixes for 5.12-rc4
Here are some small staging and IIO driver fixes for 5.12-rc4.
 
 They include:
 	- MAINTAINERS changes for the move of the staging mailing list
 	- comedi driver fixes to get request_irq() to work correctly
 	- counter driver fixes for reported issues with iio devices
 	- tiny iio driver fixes for reported issues.
 
 All of these have been in linux-next with no reported problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging and IIO driver fixes from Greg KH:
 "Some small staging and IIO driver fixes:

   - MAINTAINERS changes for the move of the staging mailing list

   - comedi driver fixes to get request_irq() to work correctly

   - counter driver fixes for reported issues with iio devices

   - tiny iio driver fixes for reported issues.

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

* tag 'staging-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: vt665x: fix alignment constraints
  staging: comedi: cb_pcidas64: fix request_irq() warn
  staging: comedi: cb_pcidas: fix request_irq() warn
  MAINTAINERS: move the staging subsystem to lists.linux.dev
  MAINTAINERS: move some real subsystems off of the staging mailing list
  iio: gyro: mpu3050: Fix error handling in mpu3050_trigger_handler
  iio: hid-sensor-temperature: Fix issues of timestamp channel
  iio: hid-sensor-humidity: Fix alignment issue of timestamp channel
  counter: stm32-timer-cnt: fix ceiling miss-alignment with reload register
  counter: stm32-timer-cnt: fix ceiling write max value
  counter: stm32-timer-cnt: Report count function when SLAVE_MODE_DISABLED
  iio: adc: ab8500-gpadc: Fix off by 10 to 3
  iio:adc:stm32-adc: Add HAS_IOMEM dependency
  iio: adis16400: Fix an error code in adis16400_initial_setup()
  iio: adc: adi-axi-adc: add proper Kconfig dependencies
  iio: adc: ad7949: fix wrong ADC result due to incorrect bit mask
  iio: hid-sensor-prox: Fix scale not correct issue
  iio:adc:qcom-spmi-vadc: add default scale to LR_MUX2_BAT_ID channel
2021-03-21 11:54:04 -07:00
Linus Torvalds 3001c3554f USB / Thunderbolt driver fixes for 5.12-rc4
Here are some small Thunderbolt and USB driver fixes for some reported
 issues:
 	- thunderbolt fixes for minor problems
 	- typec fixes for power issues
 	- usb-storage quirk addition
 	- usbip bugfix
 	- dwc3 bugfix when stopping transfers
 	- cdnsp bugfix for isoc transfers
 	- gadget use-after-free fix
 
 All have been in linux-next this week with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB and Thunderbolt driver fixes from Greg KH:
 "Here are some small Thunderbolt and USB driver fixes for some reported
  issues:

   - thunderbolt fixes for minor problems

   - typec fixes for power issues

   - usb-storage quirk addition

   - usbip bugfix

   - dwc3 bugfix when stopping transfers

   - cdnsp bugfix for isoc transfers

   - gadget use-after-free fix

  All have been in linux-next this week with no reported issues"

* tag 'usb-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: typec: tcpm: Skip sink_cap query only when VDM sm is busy
  usb: dwc3: gadget: Prevent EP queuing while stopping transfers
  usb: typec: tcpm: Invoke power_supply_changed for tcpm-source-psy-
  usb: typec: Remove vdo[3] part of tps6598x_rx_identity_reg struct
  usb-storage: Add quirk to defeat Kindle's automatic unload
  usb: gadget: configfs: Fix KASAN use-after-free
  usbip: Fix incorrect double assignment to udc->ud.tcp_rx
  usb: cdnsp: Fixes incorrect value in ISOC TRB
  thunderbolt: Increase runtime PM reference count on DP tunnel discovery
  thunderbolt: Initialize HopID IDAs in tb_switch_alloc()
2021-03-21 11:49:16 -07:00
Linus Torvalds 5ee96fa9dd A change to robustify force-threaded IRQ handlers to always disable interrupts,
plus a DocBook fix.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'irq-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq fix from Ingo Molnar:
 "A change to robustify force-threaded IRQ handlers to always disable
  interrupts, plus a DocBook fix.

  The force-threaded IRQ handler change has been accelerated from the
  normal schedule of such a change to keep the bad pattern/workaround of
  spin_lock_irqsave() in handlers or IRQF_NOTHREAD as a kludge from
  spreading"

* tag 'irq-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Disable interrupts for force threaded handlers
  genirq/irq_sim: Fix typos in kernel doc (fnode -> fwnode)
2021-03-21 11:34:24 -07:00
Linus Torvalds 1c74516c2d Boundary condition fixes for bugs unearthed by the perf fuzzer.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Boundary condition fixes for bugs unearthed by the perf fuzzer"

* tag 'perf-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Fix unchecked MSR access error caused by VLBR_EVENT
  perf/x86/intel: Fix a crash caused by zero PEBS status
2021-03-21 11:26:21 -07:00
Linus Torvalds 5ba33b488a Locking fixes:
- Get static calls & modules right. Hopefully.
 - WW mutex fixes
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking fixes from Ingo Molnar:

 - Get static calls & modules right. Hopefully.

 - WW mutex fixes

* tag 'locking-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  static_call: Fix static_call_update() sanity check
  static_call: Align static_call_is_init() patching condition
  static_call: Fix static_call_set_init()
  locking/ww_mutex: Fix acquire/release imbalance in ww_acquire_init()/ww_acquire_fini()
  locking/ww_mutex: Simplify use_ww_ctx & ww_ctx handling
2021-03-21 11:19:29 -07:00
Linus Torvalds 92ed88cb4d EFI fixes:
- another missing RT_PROP table related fix, to ensure that the efivarfs
    pseudo filesystem fails gracefully if variable services are unsupported,
  - use the correct alignment for literal EFI GUIDs,
  - fix a use after unmap issue in the memreserve code
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'efi-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull EFI fixes from Ingo Molnar:

 - another missing RT_PROP table related fix, to ensure that the
   efivarfs pseudo filesystem fails gracefully if variable services
   are unsupported

 - use the correct alignment for literal EFI GUIDs

 - fix a use after unmap issue in the memreserve code

* tag 'efi-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi: use 32-bit alignment for efi_guid_t literals
  firmware/efi: Fix a use after bug in efi_mem_reserve_persistent
  efivars: respect EFI_UNSUPPORTED return from firmware
2021-03-21 11:11:22 -07:00
Linus Torvalds 5e3ddf96e7 - Add the arch-specific mapping between physical and logical CPUs to fix
devicetree-node lookups.
 
 - Restore the IRQ2 ignore logic
 
 - Fix get_nr_restart_syscall() to return the correct restart syscall number.
 Split in a 4-patches set to avoid kABI breakage when backporting to dead
 kernels.
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Merge tag 'x86_urgent_for_v5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:
 "The freshest pile of shiny x86 fixes for 5.12:

   - Add the arch-specific mapping between physical and logical CPUs to
     fix devicetree-node lookups

   - Restore the IRQ2 ignore logic

   - Fix get_nr_restart_syscall() to return the correct restart syscall
     number. Split in a 4-patches set to avoid kABI breakage when
     backporting to dead kernels"

* tag 'x86_urgent_for_v5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/apic/of: Fix CPU devicetree-node lookups
  x86/ioapic: Ignore IRQ2 again
  x86: Introduce restart_block->arch_data to remove TS_COMPAT_RESTART
  x86: Introduce TS_COMPAT_RESTART to fix get_nr_restart_syscall()
  x86: Move TS_COMPAT back to asm/thread_info.h
  kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()
2021-03-21 11:04:20 -07:00
Linus Torvalds b35660a7ce powerpc fixes for 5.12 #4
Fix a possible stack corruption and subsequent DLPAR failure in the rpadlpar_io
 PCI hotplug driver.
 
 Two build fixes for uncommon configurations.
 
 Thanks to Christophe Leroy, Tyrel Datwyler.
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Merge tag 'powerpc-5.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - Fix a possible stack corruption and subsequent DLPAR failure in the
   rpadlpar_io PCI hotplug driver

 - Two build fixes for uncommon configurations

Thanks to Christophe Leroy and Tyrel Datwyler.

* tag 'powerpc-5.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  PCI: rpadlpar: Fix potential drc_name corruption in store functions
  powerpc: Force inlining of cpu_has_feature() to avoid build failure
  powerpc/vdso32: Add missing _restgpr_31_x to fix build failure
2021-03-21 10:57:35 -07:00
Stefan Metzmacher 0031275d11 io_uring: call req_set_fail_links() on short send[msg]()/recv[msg]() with MSG_WAITALL
Without that it's not safe to use them in a linked combination with
others.

Now combinations like IORING_OP_SENDMSG followed by IORING_OP_SPLICE
should be possible.

We already handle short reads and writes for the following opcodes:

- IORING_OP_READV
- IORING_OP_READ_FIXED
- IORING_OP_READ
- IORING_OP_WRITEV
- IORING_OP_WRITE_FIXED
- IORING_OP_WRITE
- IORING_OP_SPLICE
- IORING_OP_TEE

Now we have it for these as well:

- IORING_OP_SENDMSG
- IORING_OP_SEND
- IORING_OP_RECVMSG
- IORING_OP_RECV

For IORING_OP_RECVMSG we also check for the MSG_TRUNC and MSG_CTRUNC
flags in order to call req_set_fail_links().

There might be applications arround depending on the behavior
that even short send[msg]()/recv[msg]() retuns continue an
IOSQE_IO_LINK chain.

It's very unlikely that such applications pass in MSG_WAITALL,
which is only defined in 'man 2 recvmsg', but not in 'man 2 sendmsg'.

It's expected that the low level sock_sendmsg() call just ignores
MSG_WAITALL, as MSG_ZEROCOPY is also ignored without explicitly set
SO_ZEROCOPY.

We also expect the caller to know about the implicit truncation to
MAX_RW_COUNT, which we don't detect.

cc: netdev@vger.kernel.org
Link: https://lore.kernel.org/r/c4e1a4cc0d905314f4d5dc567e65a7b09621aab3.1615908477.git.metze@samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-03-21 09:41:14 -06:00
Jens Axboe 00ddff431a io-wq: ensure task is running before processing task_work
Mark the current task as running if we need to run task_work from the
io-wq threads as part of work handling. If that is the case, then return
as such so that the caller can appropriately loop back and reset if it
was part of a going-to-sleep flush.

Fixes: 3bfe610669 ("io-wq: fork worker threads from original task")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-03-21 09:41:14 -06:00
Eric W. Biederman 4db4b1a0d1 signal: don't allow STOP on PF_IO_WORKER threads
Just like we don't allow normal signals to IO threads, don't deliver a
STOP to a task that has PF_IO_WORKER set. The IO threads don't take
signals in general, and have no means of flushing out a stop either.

Longer term, we may want to look into allowing stop of these threads,
as it relates to eg process freezing. For now, this prevents a spin
issue if a SIGSTOP is delivered to the parent task.

Reported-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2021-03-21 09:41:07 -06:00
Jens Axboe 5be28c8f85 signal: don't allow sending any signals to PF_IO_WORKER threads
They don't take signals individually, and even if they share signals with
the parent task, don't allow them to be delivered through the worker
thread. Linux does allow this kind of behavior for regular threads, but
it's really a compatability thing that we need not care about for the IO
threads.

Reported-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-03-21 09:39:32 -06:00
Theodore Ts'o 64395d950b ext4: initialize ret to suppress smatch warning
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-03-21 00:45:37 -04:00
Pan Bian 512c15ef05 ext4: stop inode update before return
The inode update should be stopped before returing the error code.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Link: https://lore.kernel.org/r/20210117085732.93788-1-bianpan2016@163.com
Fixes: 8016e29f43 ("ext4: fast commit recovery path")
Cc: stable@kernel.org
Reviewed-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-03-21 00:42:12 -04:00
Harshad Shirwadkar 8210bb29c1 ext4: fix rename whiteout with fast commit
This patch adds rename whiteout support in fast commits. Note that the
whiteout object that gets created is actually char device. Which
imples, the function ext4_inode_journal_mode(struct inode *inode)
would return "JOURNAL_DATA" for this inode. This has a consequence in
fast commit code that it will make creation of the whiteout object a
fast-commit ineligible behavior and thus will fall back to full
commits. With this patch, this can be observed by running fast commits
with rename whiteout and seeing the stats generated by ext4_fc_stats
tracepoint as follows:

ext4_fc_stats: dev 254:32 fc ineligible reasons:
XATTR:0, CROSS_RENAME:0, JOURNAL_FLAG_CHANGE:0, NO_MEM:0, SWAP_BOOT:0,
RESIZE:0, RENAME_DIR:0, FALLOC_RANGE:0, INODE_JOURNAL_DATA:16;
num_commits:6, ineligible: 6, numblks: 3

So in short, this patch guarantees that in case of rename whiteout, we
fall back to full commits.

Amir mentioned that instead of creating a new whiteout object for
every rename, we can create a static whiteout object with irrelevant
nlink. That will make fast commits to not fall back to full
commit. But until this happens, this patch will ensure correctness by
falling back to full commits.

Fixes: 8016e29f43 ("ext4: fast commit recovery path")
Cc: stable@kernel.org
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20210316221921.1124955-1-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-03-21 00:38:18 -04:00
Jan Kara 2a4ae3bcdf ext4: fix timer use-after-free on failed mount
When filesystem mount fails because of corrupted filesystem we first
cancel the s_err_report timer reminding fs errors every day and only
then we flush s_error_work. However s_error_work may report another fs
error and re-arm timer thus resulting in timer use-after-free. Fix the
problem by first flushing the work and only after that canceling the
s_err_report timer.

Reported-by: syzbot+628472a2aac693ab0fcd@syzkaller.appspotmail.com
Fixes: 2d01ddc866 ("ext4: save error info to sb through journal if available")
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210315165906.2175-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-03-21 00:27:49 -04:00
Shijie Luo 7d8bd3c76d ext4: fix potential error in ext4_do_update_inode
If set_large_file = 1 and errors occur in ext4_handle_dirty_metadata(),
the error code will be overridden, go to out_brelse to avoid this
situation.

Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Link: https://lore.kernel.org/r/20210312065051.36314-1-luoshijie1@huawei.com
Cc: stable@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-03-21 00:14:08 -04:00
zhangyi (F) 6b22489911 ext4: do not try to set xattr into ea_inode if value is empty
Syzbot report a warning that ext4 may create an empty ea_inode if set
an empty extent attribute to a file on the file system which is no free
blocks left.

  WARNING: CPU: 6 PID: 10667 at fs/ext4/xattr.c:1640 ext4_xattr_set_entry+0x10f8/0x1114 fs/ext4/xattr.c:1640
  ...
  Call trace:
   ext4_xattr_set_entry+0x10f8/0x1114 fs/ext4/xattr.c:1640
   ext4_xattr_block_set+0x1d0/0x1b1c fs/ext4/xattr.c:1942
   ext4_xattr_set_handle+0x8a0/0xf1c fs/ext4/xattr.c:2390
   ext4_xattr_set+0x120/0x1f0 fs/ext4/xattr.c:2491
   ext4_xattr_trusted_set+0x48/0x5c fs/ext4/xattr_trusted.c:37
   __vfs_setxattr+0x208/0x23c fs/xattr.c:177
  ...

Now, ext4 try to store extent attribute into an external inode if
ext4_xattr_block_set() return -ENOSPC, but for the case of store an
empty extent attribute, store the extent entry into the extent
attribute block is enough. A simple reproduce below.

  fallocate test.img -l 1M
  mkfs.ext4 -F -b 2048 -O ea_inode test.img
  mount test.img /mnt
  dd if=/dev/zero of=/mnt/foo bs=2048 count=500
  setfattr -n "user.test" /mnt/foo

Reported-by: syzbot+98b881fdd8ebf45ab4ae@syzkaller.appspotmail.com
Fixes: 9c6e7853c5 ("ext4: reserve space for xattr entries/names")
Cc: stable@kernel.org
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Link: https://lore.kernel.org/r/20210305120508.298465-1-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-03-21 00:09:17 -04:00
zhangyi (F) 5dccdc5a19 ext4: do not iput inode under running transaction in ext4_rename()
In ext4_rename(), when RENAME_WHITEOUT failed to add new entry into
directory, it ends up dropping new created whiteout inode under the
running transaction. After commit <9b88f9fb0d2> ("ext4: Do not iput inode
under running transaction"), we follow the assumptions that evict() does
not get called from a transaction context but in ext4_rename() it breaks
this suggestion. Although it's not a real problem, better to obey it, so
this patch add inode to orphan list and stop transaction before final
iput().

Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Link: https://lore.kernel.org/r/20210303131703.330415-2-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-03-21 00:09:14 -04:00
zhangyi (F) b7ff91fd03 ext4: find old entry again if failed to rename whiteout
If we failed to add new entry on rename whiteout, we cannot reset the
old->de entry directly, because the old->de could have moved from under
us during make indexed dir. So find the old entry again before reset is
needed, otherwise it may corrupt the filesystem as below.

  /dev/sda: Entry '00000001' in ??? (12) has deleted/unused inode 15. CLEARED.
  /dev/sda: Unattached inode 75
  /dev/sda: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.

Fixes: 6b4b8e6b4a ("ext4: fix bug for rename with RENAME_WHITEOUT")
Cc: stable@vger.kernel.org
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Link: https://lore.kernel.org/r/20210303131703.330415-1-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-03-21 00:03:39 -04:00
Thomas Gleixner 81e2073c17 genirq: Disable interrupts for force threaded handlers
With interrupt force threading all device interrupt handlers are invoked
from kernel threads. Contrary to hard interrupt context the invocation only
disables bottom halfs, but not interrupts. This was an oversight back then
because any code like this will have an issue:

thread(irq_A)
  irq_handler(A)
    spin_lock(&foo->lock);

interrupt(irq_B)
  irq_handler(B)
    spin_lock(&foo->lock);

This has been triggered with networking (NAPI vs. hrtimers) and console
drivers where printk() happens from an interrupt which interrupted the
force threaded handler.

Now people noticed and started to change the spin_lock() in the handler to
spin_lock_irqsave() which affects performance or add IRQF_NOTHREAD to the
interrupt request which in turn breaks RT.

Fix the root cause and not the symptom and disable interrupts before
invoking the force threaded handler which preserves the regular semantics
and the usefulness of the interrupt force threading as a general debugging
tool.

For not RT this is not changing much, except that during the execution of
the threaded handler interrupts are delayed until the handler
returns. Vs. scheduling and softirq processing there is no difference.

For RT kernels there is no issue.

Fixes: 8d32a307e4 ("genirq: Provide forced interrupt threading")
Reported-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Johan Hovold <johan@kernel.org>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20210317143859.513307808@linutronix.de
2021-03-21 00:17:52 +01:00
Linus Torvalds 812da4d394 RISC-V Fixes for 5.12-rc4
I have handful of fixes for 5.12:
 
 * A fix to the SBI remote fence numbers for hypervisor fences, which had
   been transcribed in the wrong order in Linux.  These fences are only
   used with the KVM patches applied.
 * A whole host of build warnings have been fixed, these should have no
   functional change.
 * A fix to init_resources() that prevents an off-by-one error from
   causing an out-of-bounds array reference.  This is manifesting during
   boot on vexriscv.
 * A fix to ensure the KASAN mappings are visible before proceeding to
   use them.
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Merge tag 'riscv-for-linus-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:
 "A handful of fixes for 5.12:

   - fix the SBI remote fence numbers for hypervisor fences, which had
     been transcribed in the wrong order in Linux. These fences are only
     used with the KVM patches applied.

   - fix a whole host of build warnings, these should have no functional
     change.

   - fix init_resources() to prevent an off-by-one error from causing an
     out-of-bounds array reference. This was manifesting during boot on
     vexriscv.

   - ensure the KASAN mappings are visible before proceeding to use
     them"

* tag 'riscv-for-linus-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Correct SPARSEMEM configuration
  RISC-V: kasan: Declare kasan_shallow_populate() static
  riscv: Ensure page table writes are flushed when initializing KASAN vmalloc
  RISC-V: Fix out-of-bounds accesses in init_resources()
  riscv: Fix compilation error with Canaan SoC
  ftrace: Fix spelling mistake "disabed" -> "disabled"
  riscv: fix bugon.cocci warnings
  riscv: process: Fix no prototype for arch_dup_task_struct
  riscv: ftrace: Use ftrace_get_regs helper
  riscv: process: Fix no prototype for show_regs
  riscv: syscall_table: Reduce W=1 compilation warnings noise
  riscv: time: Fix no prototype for time_init
  riscv: ptrace: Fix no prototype warnings
  riscv: sbi: Fix comment of __sbi_set_timer_v01
  riscv: irq: Fix no prototype warning
  riscv: traps: Fix no prototype warnings
  RISC-V: correct enum sbi_ext_rfence_fid
2021-03-20 11:01:54 -07:00