Now that a client can have multiple xprts, we need to
report the statistics for all of them.
Reported-by: Chuck Lever <[email protected]>
Signed-off-by: NeilBrown <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>
For diagnostic purposes, it would be useful to have an rpc_iostats
metric of RPCs completing with tk_status < 0. Unfortunately,
tk_status is reset inside the rpc_call_done functions for each
operation, and the call to tally the per-op metrics comes after
rpc_call_done. Refactor the call to rpc_count_iostat earlier in
rpc_exit_task so we can count these RPCs completing in error.
Signed-off-by: Dave Wysochanski <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>
With NFSv4.1, different network connections need to be explicitly
bound to a session. During session startup, this is not possible
so only a single connection must be used for session startup.
So add a task flag to disable the default round-robin choice of
connections (when nconnect > 1) and force the use of a single
connection.
Then use that flag on all requests for session management - for
consistence, include NFSv4.0 management (SETCLIENTID) and session
destruction
Reported-by: Chuck Lever <[email protected]>
Signed-off-by: NeilBrown <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>
If the user specifies -onconnect=<number> mount option, and the transport
protocol is TCP, then set up <number> connections to the pNFS data server
as well. The connections will all go to the same IP address.
Signed-off-by: Trond Myklebust <[email protected]>
If the user specifies the -onconn=<number> mount option, and the transport
protocol is TCP, then set up <number> connections to the server. The
connections will all go to the same IP address.
Signed-off-by: Trond Myklebust <[email protected]>
Allow the user to specify that the client should use multiple connections
to the server. For the moment, this functionality will be limited to
TCP and to NFSv4.x (x>0).
Signed-off-by: Trond Myklebust <[email protected]>
Add an argument to struct rpc_create_args that allows the specification
of how many transport connections you want to set up to the server.
Signed-off-by: Trond Myklebust <[email protected]>
In order to identify containers to the NFS client, we add a per-net
sysfs attribute that udev can fill with the appropriate identifier.
The identifier could be a unique hostname, but in most cases it
will probably be a persisted uuid.
Signed-off-by: Trond Myklebust <[email protected]>
If the client detects that close-to-open cache consistency has been
violated, and that the file or directory has been changed on the
server, then do a cache invalidation when we're done working with
the file.
The reason we don't do an immediate cache invalidation is that we
want to avoid performance problems due to false positives. Also,
note that we cannot guarantee cache consistency in this situation
even if we do invalidate the cache.
Signed-off-by: Trond Myklebust <[email protected]>
For now, just count the queue length. It is less accurate than counting
number of bytes queued, but easier to implement.
Signed-off-by: Trond Myklebust <[email protected]>
The queue timer function, which walks the RPC queue in order to locate
candidates for waking up is one of the current constraints against
removing the bh-safe queue spin locks. Replace it with a delayed
work queue, so that we can do the actual rpc task wake ups from an
ordinary process context.
Signed-off-by: Trond Myklebust <[email protected]>
According to the open() manpage, Linux reserves the access mode 3
to mean "check for read and write permission on the file and return
a file descriptor that can't be used for reading or writing."
Currently, the NFSv4 code will ask the server to open the file,
and will use an incorrect share access mode of 0. Since it has
an incorrect share access mode, the client later forgets to send
a corresponding close, meaning it can leak stateids on the server.
Fixes: ce4ef7c0a8 ("NFS: Split out NFS v4 file operations")
Cc: [email protected] # 3.6+
Signed-off-by: Trond Myklebust <[email protected]>
When mapping the NFSv4 context to an open mode and access mode,
we need to treat the FMODE_EXEC flag differently. For the open
mode, FMODE_EXEC means we need read share access. For the access
mode checking, we need to verify that the user actually has
execute access.
Signed-off-by: Trond Myklebust <[email protected]>
Pull MIPS fixes from Paul Burton:
"A few more MIPS fixes:
- Fix a silly typo in virt_addr_valid which led to completely bogus
behavior (that happened to stop tripping up hardened usercopy
despite being broken).
- Fix UART parity setup on AR933x systems.
- A build fix for non-Linux build machines.
- Have the 'all' make target build DTBs, primarily to fit in with the
behavior of scripts/package/builddeb.
- Handle an execution hazard in TLB exceptions that use KScratch
registers, which could inadvertently clobber the $1 register on
some generally higher-end out-of-order CPUs.
- A MAINTAINERS update to fix the path to the NAND driver for Ingenic
systems"
* tag 'mips_fixes_5.2_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MAINTAINERS: Correct path to moved files
MIPS: Add missing EHB in mtc0 -> mfc0 sequence.
MIPS: have "plain" make calls build dtbs for selected platforms
MIPS: fix build on non-linux hosts
MIPS: ath79: fix ar933x uart parity mode
MIPS: Fix bounds check virt_addr_valid
Pull SCSI fixes from James Bottomley:
"Two iscsi fixes.
One for an oops in the client which can be triggered by the server
authentication protocol and the other in the target code which causes
data corruption"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: iscsi: set auth_protocol back to NULL if CHAP_A value is not supported
scsi: target/iblock: Fix overrun in WRITE SAME emulation
Pull vfs fixlet from Al Viro:
"Fix bogus default y in Kconfig (VALIDATE_FS_PARSER)
That thing should not be turned on by default, especially since it's
not quiet in case it finds no problems. Geert has sent the obvious fix
quite a few times, but it fell through the cracks"
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fs: VALIDATE_FS_PARSER should default to n
Pull kvm fixes from Paolo Bonzini:
"x86 bugfix patches and one compilation fix for ARM"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: arm64/sve: Fix vq_present() macro to yield a bool
KVM: LAPIC: Fix pending interrupt in IRR blocked by software disable LAPIC
KVM: nVMX: Change KVM_STATE_NESTED_EVMCS to signal vmcs12 is copied from eVMCS
KVM: nVMX: Allow restore nested-state to enable eVMCS when vCPU in SMM
KVM: x86: degrade WARN to pr_warn_ratelimited
Pull mtf fixes from Miquel Raynal:
- Fix the memory organization structure of a Macronix SPI-NAND chip.
- Fix a build dependency wrongly described.
- Fix the sunxi NAND driver for A23/A33 SoCs by (a) reverting the
faulty commit introducing broken DMA support and (b) applying another
commit bringing working DMA support.
* tag 'mtd/fixes-for-5.2-final' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
mtd: rawnand: sunxi: Add A23/A33 DMA support with extra MBUS configuration
Revert "mtd: rawnand: sunxi: Add A23/A33 DMA support"
mtd: rawnand: ingenic: Fix ingenic_ecc dependency
mtd: spinand: Fix max_bad_eraseblocks_per_lun info in memorg
Pull i2c fixlet from Wolfram Sang:
"I2C has a MAINTAINERS update which will be benfitial for developers,
so let's add it right away"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: tegra: Add Dmitry as a reviewer
Pull nfsd fixes from Bruce Fields:
"Two more quick bugfixes for nfsd: fixing a regression causing mount
failures on high-memory machines and fixing the DRC over RDMA"
* tag 'nfsd-5.2-2' of git://linux-nfs.org/~bfields/linux:
nfsd: Fix overflow causing non-working mounts on 1 TB machines
svcrdma: Ignore source port when computing DRC hash
Allwinner NAND controllers can make use of DMA to enhance the I/O
throughput thanks to ECC pipelining. DMA handling with A23/A33 NAND IP
is a bit different than with the older SoCs, hence the introduction of
a new compatible to handle:
* the differences between register offsets,
* the burst length change from 4 to minimum 8,
* manage SRAM accesses through MBUS with extra configuration.
Fixes: c49836f05a ("mtd: rawnand: sunxi: Add A23/A33 DMA support")
Signed-off-by: Miquel Raynal <[email protected]>
This reverts commit c49836f05a.
The commit is wrong and its approach actually does not work. Let's
revert it in order to add the feature with a clean patch.
Fixes: c49836f05a ("mtd: rawnand: sunxi: Add A23/A33 DMA support")
Signed-off-by: Miquel Raynal <[email protected]>
I'm contributing to Tegra's upstream development in general and happened
to review the Tegra's I2C patches for awhile because I'm actively using
upstream kernel on all of my Tegra-powered devices and initially some of
the submitted patches were getting my attention since they were causing
problems. Recently Wolfram Sang asked whether I'm interested in becoming
a reviewer for the driver and I don't mind at all.
Signed-off-by: Dmitry Osipenko <[email protected]>
[wsa: ack was expressed by Thierry Reding in a mail thread]
Signed-off-by: Wolfram Sang <[email protected]>
CONFIG_VALIDATE_FS_PARSER is a debugging tool to check that the parser
tables are vaguely sane. It was set to default to 'Y' for the moment to
catch errors in upcoming fs conversion development.
Make sure it is not enabled by default in the final release of v5.1.
Fixes: 31d921c7fb ("vfs: Add configuration parser helpers")
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Al Viro <[email protected]>
The original implementation of vq_present() relied on aggressive
inlining in order for the compiler to know that the code is
correct, due to some const-casting issues. This was causing sparse
and clang to complain, while GCC compiled cleanly.
Commit 0c529ff789 addressed this problem, but since vq_present()
is no longer a function, there is now no implicit casting of the
returned value to the return type (bool).
In set_sve_vls(), this uncast bit value is compared against a bool,
and so may spuriously compare as unequal when both are nonzero. As
a result, KVM may reject valid SVE vector length configurations as
invalid, and vice versa.
Fix it by forcing the returned value to a bool.
Signed-off-by: Zhang Lei <[email protected]>
Fixes: 0c529ff789 ("KVM: arm64: Implement vq_present() as a macro")
Signed-off-by: Dave Martin <[email protected]> [commit message rewrite]
Cc: Viresh Kumar <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
It is possible for an irq triggered by channel0 to be received later
after clks are disabled once firmware loaded during sdma probe. If
that happens then clearing them by writing to SDMA_H_INTR won't work
and the kernel will hang processing infinite interrupts. Actually,
don't need interrupt triggered on channel0 since it's pollling
SDMA_H_STATSTOP to know channel0 done rather than interrupt in
current code, just clear BD_INTR to disable channel0 interrupt to
avoid the above case.
This issue was brought by commit 1d069bfa3c ("dmaengine: imx-sdma:
ack channel 0 IRQ in the interrupt handler") which didn't take care
the above case.
Fixes: 1d069bfa3c ("dmaengine: imx-sdma: ack channel 0 IRQ in the interrupt handler")
Cc: [email protected] #5.0+
Signed-off-by: Robin Gong <[email protected]>
Reported-by: Sven Van Asbroeck <[email protected]>
Tested-by: Sven Van Asbroeck <[email protected]>
Reviewed-by: Michael Olbrich <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
If probe() fails anywhere beyond the point where
sdma_get_firmware() is called, then a kernel oops may occur.
Problematic sequence of events:
1. probe() calls sdma_get_firmware(), which schedules the
firmware callback to run when firmware becomes available,
using the sdma instance structure as the context
2. probe() encounters an error, which deallocates the
sdma instance structure
3. firmware becomes available, firmware callback is
called with deallocated sdma instance structure
4. use after free - kernel oops !
Solution: only attempt to load firmware when we're certain
that probe() will succeed. This guarantees that the firmware
callback's context will remain valid.
Note that the remove() path is unaffected by this issue: the
firmware loader will increment the driver module's use count,
ensuring that the module cannot be unloaded while the
firmware callback is pending or running.
Signed-off-by: Sven Van Asbroeck <[email protected]>
Reviewed-by: Robin Gong <[email protected]>
[vkoul: fixed braces for if condition]
Signed-off-by: Vinod Koul <[email protected]>
The "pending" variable was a u32 but we cast it to an unsigned long
pointer when we do the for_each_set_bit() loop. The problem is that on
big endian 64bit systems that results in an out of bounds read.
Fixes: 4e4106f5e9 ("dmaengine: jz4780: Fix transfers being ACKed too soon")
Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Pull drm fixes from Dave Airlie:
"I skipped last week because there wasn't much worth doing, this week
got a few more fixes in.
amdgpu:
- default register value change
- runpm regression fix
- fan control fix
i915:
- fix Ironlake regression
panfrost:
- fix a double free
virtio:
- fix a locking bug
imx:
- crtc disable fixes"
* tag 'drm-fixes-2019-07-05-1' of git://anongit.freedesktop.org/drm/drm:
drm/imx: only send event on crtc disable if kept disabled
drm/imx: notify drm core before sending event during crtc disable
drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context
drm/amdgpu/gfx9: use reset default for PA_SC_FIFO_SIZE
drm/amdgpu: Don't skip display settings in hwmgr_resume()
drm/amd/powerplay: use hardware fan control if no powerplay fan table
drm/panfrost: Fix a double-free error
drm/etnaviv: add missing failure path to destroy suballoc
drm/virtio: move drm_connector_update_edid_property() call
drm/imx: fix stale vblank timestamp after a modeset
This series fixes stale vblank timestamps in the first event sent after
a crtc was disabled. The core now is notified via drm_crtc_vblank_off
before sending the last pending event in atomic_disable. If the crtc is
reenabled right away during to a modeset, the event is not sent at all,
as the next vblank will take care of it.
Signed-off-by: Dave Airlie <[email protected]>
From: Philipp Zabel <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Pull crypto fixes from Herbert Xu:
"This fixes two memory leaks and a list corruption bug"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: user - prevent operating on larval algorithms
crypto: cryptd - Fix skcipher instance memory leak
lib/mpi: Fix karactx leak in mpi_powm
Pull ARM SoC fixes from Olof Johansson:
"Likely our final small batch of fixes for 5.2:
- Some fixes for USB on davinci, regressions were due to the recent
conversion of the OCHI driver to use GPIO regulators
- A fixup of kconfig dependencies for a TI irq controller
- A switch of armada-38x to avoid dropped characters on uart, caused
by switch of base inherited platform description earlier this year"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
ARM: davinci: da830-evm: fix GPIO lookup for OHCI
ARM: davinci: omapl138-hawk: add missing regulator constraints for OHCI
ARM: davinci: da830-evm: add missing regulator constraints for OHCI
soc: ti: fix irq-ti-sci link error
ARM: dts: armada-xp-98dx3236: Switch to armada-38x-uart serial node
Pull dax fix from Dan Williams:
"A single dax fix that has been soaking awaiting other fixes under
discussion to join it. As it is getting late in the cycle lets proceed
with this fix and save follow-on changes for post-v5.3-rc1.
- Fix xarray entry association for mixed mappings"
* tag 'dax-fix-5.2-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
dax: Fix xarray entry association for mixed mappings
swap_readpage() sets waiter = bio->bi_private even if synchronous = F,
this means that the caller can get the spurious wakeup after return.
This can be fatal if blk_wake_io_task() does
set_current_state(TASK_RUNNING) after the caller does
set_special_state(), in the worst case the kernel can crash in
do_task_dead().
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 0619317ff8 ("block: add polled wakeup task helper")
Signed-off-by: Oleg Nesterov <[email protected]>
Reported-by: Qian Cai <[email protected]>
Acked-by: Hugh Dickins <[email protected]>
Reviewed-by: Jens Axboe <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
devm_ioremap_resource() does not currently take 'const' arguments, which
results in a warning from the first driver trying to do it anyway:
drivers/gpio/gpio-amd-fch.c: In function 'amd_fch_gpio_probe':
drivers/gpio/gpio-amd-fch.c:171:49: error: passing argument 2 of 'devm_ioremap_resource' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
priv->base = devm_ioremap_resource(&pdev->dev, &amd_fch_gpio_iores);
^~~~~~~~~~~~~~~~~~~
Change the prototype to allow it, as there is no real reason not to.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 9bb2e0452508 ("gpio: amd: Make resource struct const")
Signed-off-by: Arnd Bergmann <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Reviewed-by: Enrico Weigelt <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Linus Walleij <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Ulf Hansson <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Heikki Krogerus <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
In production we have noticed hard lockups on large machines running
large jobs due to kswaps hoarding lru lock within isolate_lru_pages when
sc->reclaim_idx is 0 which is a small zone. The lru was couple hundred
GiBs and the condition (page_zonenum(page) > sc->reclaim_idx) in
isolate_lru_pages() was basically skipping GiBs of pages while holding
the LRU spinlock with interrupt disabled.
On further inspection, it seems like there are two issues:
(1) If kswapd on the return from balance_pgdat() could not sleep (i.e.
node is still unbalanced), the classzone_idx is unintentionally set
to 0 and the whole reclaim cycle of kswapd will try to reclaim only
the lowest and smallest zone while traversing the whole memory.
(2) Fundamentally isolate_lru_pages() is really bad when the
allocation has woken kswapd for a smaller zone on a very large machine
running very large jobs. It can hoard the LRU spinlock while skipping
over 100s of GiBs of pages.
This patch only fixes (1). (2) needs a more fundamental solution. To
fix (1), in the kswapd context, if pgdat->kswapd_classzone_idx is
invalid use the classzone_idx of the previous kswapd loop otherwise use
the one the waker has requested.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: e716f2eb24 ("mm, vmscan: prevent kswapd sleeping prematurely due to mismatched classzone_idx")
Signed-off-by: Shakeel Butt <[email protected]>
Reviewed-by: Yang Shi <[email protected]>
Acked-by: Mel Gorman <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Hillf Danton <[email protected]>
Cc: Roman Gushchin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
When IOCB_CMD_POLL is used on a userfaultfd, aio_poll() disables IRQs
and takes kioctx::ctx_lock, then userfaultfd_ctx::fd_wqh.lock.
This may have to wait for userfaultfd_ctx::fd_wqh.lock to be released by
userfaultfd_ctx_read(), which in turn can be waiting for
userfaultfd_ctx::fault_pending_wqh.lock or
userfaultfd_ctx::event_wqh.lock.
But elsewhere the fault_pending_wqh and event_wqh locks are taken with
IRQs enabled. Since the IRQ handler may take kioctx::ctx_lock, lockdep
reports that a deadlock is possible.
Fix it by always disabling IRQs when taking the fault_pending_wqh and
event_wqh locks.
Commit ae62c16e10 ("userfaultfd: disable irqs when taking the
waitqueue lock") didn't fix this because it only accounted for the
fd_wqh lock, not the other locks nested inside it.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: bfe4037e72 ("aio: implement IOCB_CMD_POLL")
Signed-off-by: Eric Biggers <[email protected]>
Reported-by: [email protected]
Reported-by: [email protected]
Reported-by: [email protected]
Reviewed-by: Andrew Morton <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: <[email protected]> [4.19+]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
NeilBrown