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Preallocate one workspace for each compression type so we can guarantee
forward progress in the worst case. A failure cannot be a hard error as
we might not use compression at all on the filesystem. If we can't
allocate the workspaces later when need them, it might actually
deadlock, but in such situation the system has effectively not enough
memory to operate properly.
Signed-off-by: David Sterba <dsterba@suse.com>
UBSAN: Undefined behaviour in fs/btrfs/extent-tree.c:4623:21
signed integer overflow:
10808 * 262144 cannot be represented in type 'int [8]'
If 8192<=items<16384, we request a writeback of an insane number of pages
which is benign (everything will be written). But if items>=16384, the
space reservation won't be enough.
Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
During a mount, we start the cleaner kthread first because the transaction
kthread wants to wake up the cleaner kthread. We start the transaction
kthread next because everything in btrfs wants transactions. We do reloc
recovery in the thread that was doing the original mount call once the
transaction kthread is running. This means that the cleaner kthread
could already be running when reloc recovery happens (e.g. if a snapshot
delete was started before a crash).
Relocation does not play well with the cleaner kthread, so a mutex was
added in commit 5f3164813b "Btrfs: fix
race between balance recovery and root deletion" to prevent both from
being active at the same time.
If the cleaner kthread is already holding the mutex by the time we get
to btrfs_recover_relocation, the mount will be blocked until at least
one deleted subvolume is cleaned (possibly more if the mount process
doesn't get the lock right away). During this time (which could be an
arbitrarily long time on a large/slow filesystem), the mount process is
stuck and the filesystem is unnecessarily inaccessible.
Fix this by locking cleaner_mutex before we start cleaner_kthread, and
unlocking the mutex after mount no longer requires it. This ensures
that the mounting process will not be blocked by the cleaner kthread.
The cleaner kthread is already prepared for mutex contention and will
just go to sleep until the mutex is available.
Signed-off-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
pagev array in scrub_block{} is of size SCRUB_MAX_PAGES_PER_BLOCK.
page_index should be checked with the same to trigger BUG_ON().
Signed-off-by: Ashish Samant <ashish.samant@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs_map_block can go horribly wrong in the face of fs corruption, lets agree
to not be assholes and panic at any possible chance things are all fucked up.
Signed-off-by: Josef Bacik <jbacik@fb.com>
[ removed type casts ]
Signed-off-by: David Sterba <dsterba@suse.com>
The struct 'map_lookup' uses type int for @stripe_len, while
btrfs_chunk_stripe_len() can return a u64 value, and it may end up with
@stripe_len being undefined value and it can lead to 'divide error' in
__btrfs_map_block().
This changes 'map_lookup' to use type u64 for stripe_len, also right now
we only use BTRFS_STRIPE_LEN for stripe_len, so this adds a valid checker for
BTRFS_STRIPE_LEN.
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Reported-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ folded division fix to scrub_raid56_parity ]
Signed-off-by: David Sterba <dsterba@suse.com>
If the label setting ioctl races with sysfs label handler, we could get
mixed result in the output, part old part new. We should either get the
old or new label. The chances to hit this race are low.
Signed-off-by: David Sterba <dsterba@suse.com>
Add a sanity check for the fs_info as we will dereference it, similar to
what the 'store features' handler does.
Signed-off-by: David Sterba <dsterba@suse.com>
The key variable occupies 17 bytes, the key_start is used once, we can
simply reuse existing 'key' for that purpose. As the key is not a simple
type, compiler doest not do it on itself.
Signed-off-by: David Sterba <dsterba@suse.com>
The size of root item is more than 400 bytes, which is quite a lot of
stack space. As we do IO from inside the subvolume ioctls, we should
keep the stack usage low in case the filesystem is on top of other
layers (NFS, device mapper, iscsi, etc).
Reviewed-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The "sizeof(*arg->clone_sources) * arg->clone_sources_count" expression
can overflow. It causes several static checker warnings. It's all
under CAP_SYS_ADMIN so it's not that serious but lets silence the
warnings.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Since mixed block groups accounting isn't byte-accurate and f_bree is an
unsigned integer, it could overflow. Avoid this.
Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Suggested-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Metadata for mixed block is already accounted in total data and should not
be counted as part of the free metadata space.
Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=114281
Signed-off-by: David Sterba <dsterba@suse.com>
Currently, we don't allow the user to try and rebalance to a dup profile
on a multi-device filesystem. In most cases, this is a perfectly sensible
restriction as raid1 uses the same amount of space and provides better
protection.
However, when reshaping a multi-device filesystem down to a single device
filesystem, this requires the user to convert metadata and system chunks
to single profile before deleting devices, and then convert again to dup,
which leaves a period of time where metadata integrity is reduced.
This patch removes the single-device-only restriction from converting to
dup profile to remove this potential data integrity reduction.
Signed-off-by: Austin S. Hemmelgarn <ahferroin7@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now we force to create empty block group to keep data profile alive,
however, in the below example, we eventually get an empty block group
while we're trying to get more space for other types (metadata/system),
- Before,
block group "A": size=2G, used=1.2G
block group "B": size=2G, used=512M
- After "btrfs balance start -dusage=50 mount_point",
block group "A": size=2G, used=(1.2+0.5)G
block group "C": size=2G, used=0
Since there is no data in block group C, it won't be deleted
automatically and we have to get the unused 2G until the next mount.
Balance itself just moves data and doesn't remove data, so it's safe
to not create such a empty block group if we already have data
allocated in other block groups.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The delalloc reserved space is calculated in terms of number of bytes
used by an integral number of blocks. This is done by rounding down the
value of 'pos' to the nearest multiple of sectorsize.
The file offset value held by 'pos' variable may not be aligned to
sectorsize and hence when passing it as an argument to
btrfs_delalloc_release_space(), we may end up releasing larger delalloc
space than we originally had reserved.
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now that we bail out immediately if ->writepage() returns an error,
we don't need an extra error to retain the error code.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
If sequential writer is writing in the middle of the page and it just redirties
the last written page by continuing from it.
In the above case this can end up with seeking back to that firstly redirtied
page after writing all the pages at the end of file because btrfs updates
mapping->writeback_index to 1 past the current one.
For non-cow filesystems, the cost is only about extra seek, while for cow
filesystems such as btrfs, it means unnecessary fragments.
To avoid it, we just need to continue writeback from the last written page.
This also updates btrfs to behave like what write_cache_pages() does, ie, bail
out immediately if there is an error in writepage().
<Ref: https://www.spinics.net/lists/linux-btrfs/msg52628.html>
Reported-by: Holger Hoffstätte <holger.hoffstaette@googlemail.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
32-bit ioctl uses these rather than the regular FS_IOC_* versions. They can
be handled in btrfs using the same code. Without this, 32-bit {ch,ls}attr
fail.
Signed-off-by: Luke Dashjr <luke-jr+git@utopios.org>
Cc: stable@vger.kernel.org
Reviewed-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Pull thermal fixes from Eduardo Valentin:
"Specifics in this pull request:
- Fixes in mediatek and OF thermal drivers
- Fixes in power_allocator governor
- More fixes of unsigned to int type change in thermal_core.c.
These change have been CI tested using KernelCI bot. \o/"
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
thermal: fix Mediatek thermal controller build
thermal: consistently use int for trip temp
thermal: fix mtk_thermal build dependency
thermal: minor mtk_thermal.c cleanups
thermal: power_allocator: req_range multiplication should be a 64 bit type
thermal: of: add __init attribute
Here is one patch to wire up the preadv/pwritev system calls in the
generic system call table, which is required for all architectures
that were merged in the last few years, including arm64.
Usually these get merged along with the syscall implementation
or one of the architecture trees, but this time that did not
happen.
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Merge tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic update from Arnd Bergmann:
"Here is one patch to wire up the preadv/pwritev system calls in the
generic system call table, which is required for all architectures
that were merged in the last few years, including arm64.
Usually these get merged along with the syscall implementation or one
of the architecture trees, but this time that did not happen.
Andre and Christoph both sent a version of this patch, I picked the
one I got first"
* tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
generic syscalls: wire up preadv2 and pwritev2 syscalls
These new syscalls are implemented as generic code, so enable them for
architectures like arm64 which use the generic syscall table.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Pull x86 fixes from Ingo Molnar:
"Misc fixes: two EDAC driver fixes, a Xen crash fix, a HyperV log spam
fix and a documentation fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86 EDAC, sb_edac.c: Take account of channel hashing when needed
x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address
x86/mm/xen: Suppress hugetlbfs in PV guests
x86/doc: Correct limits in Documentation/x86/x86_64/mm.txt
x86/hyperv: Avoid reporting bogus NMI status for Gen2 instances
Pull perf, cpu hotplug and timer fixes from Ingo Molnar:
"perf:
- A single tooling fix for a user-triggerable segfault.
CPU hotplug:
- Fix a CPU hotplug corner case regression, introduced by the recent
hotplug rework
timers:
- Fix a boot hang in the ARM based Tango SoC clocksource driver"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf intel-pt: Fix segfault tracing transactions
* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
cpu/hotplug: Fix rollback during error-out in __cpu_disable()
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource/drivers/tango-xtal: Fix boot hang due to incorrect test
Pull locking fixes from Ingo Molnar:
"Misc fixes:
pvqspinlocks:
- an instrumentation fix
futexes:
- preempt-count vs pagefault_disable decouple corner case fix
- futex requeue plist race window fix
- futex UNLOCK_PI transaction fix for a corner case"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic()
futex: Acknowledge a new waiter in counter before plist
futex: Handle unlock_pi race gracefully
locking/pvqspinlock: Fix division by zero in qstat_read()
Pull irq fixes from Ingo Molnar:
"A core irq affinity masks related fix and a MIPS irqchip driver fix"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/mips-gic: Don't overrun pcpu_masks array
genirq: Dont allow affinity mask to be updated on IPIs
Pull objtool fixes from Ingo Molnar:
"A handful of objtool fixes: two improvements to how warnings are
printed plus a false positive warning fix, and build environment fix"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Fix Makefile to properly see if libelf is supported
objtool: Detect falling through to the next function
objtool: Add workaround for GCC switch jump table bug
Here are two small sets of patches, both from subsystem trees, USB
gadget and PHY drivers.
Full details are in the shortlog, and they have all been in linux-next
for a while (before I merged them to the USB tree.)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB / PHY driver fixes from Greg KH:
"Here are two small sets of patches, both from subsystem trees, USB
gadget and PHY drivers.
Full details are in the shortlog, and they have all been in linux-next
for a while (before I merged them to the USB tree)"
* tag 'usb-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: gadget: f_fs: Fix use-after-free
usb: dwc3: gadget: Fix suspend/resume during device mode
usb: dwc3: fix memory leak of dwc->regset
usb: dwc3: core: fix PHY handling during suspend
usb: dwc3: omap: fix up error path on probe()
usb: gadget: composite: Clear reserved fields of SSP Dev Cap
phy: rockchip-emmc: adapt binding to specifiy register offset and length
phy: rockchip-emmc: should be a child device of the GRF
phy: rockchip-dp: should be a child device of the GRF
Here are 3 serial driver fixes for issues that have been reported. Two
are reverts, fixing problems that were in the big TTY/Serial driver
merge in 4.6-rc1, and the last one is a simple bugfix for a regression
that showed up in 4.6-rc1 as well.
All have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull serial fixes from Greg KH:
"Here are 3 serial driver fixes for issues that have been reported.
Two are reverts, fixing problems that were in the big TTY/Serial
driver merge in 4.6-rc1, and the last one is a simple bugfix for a
regression that showed up in 4.6-rc1 as well.
All have been in linux-next with no reported issues"
* tag 'tty-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
Revert "serial: 8250: Add hardware dependency to RT288X option"
tty/serial/8250: fix RS485 half-duplex RX
Revert "serial-uartlite: Constify uartlite_be/uartlite_le"
- Make the i.MX driver select REGMAP as a dependency
- Fix up the Mediatek debounce time unit
- Fix a real hairy ffs vs __ffs issue in the Single pinctrl driver
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Merge tag 'pinctrl-v4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control fixes from Linus Walleij:
"Some pin control driver fixes came in. One headed for stable and the
other two are just ordinary merge window fixes.
- Make the i.MX driver select REGMAP as a dependency
- Fix up the Mediatek debounce time unit
- Fix a real hairy ffs vs __ffs issue in the Single pinctrl driver"
* tag 'pinctrl-v4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: single: Fix pcs_parse_bits_in_pinctrl_entry to use __ffs than ffs
pinctrl: mediatek: correct debounce time unit in mtk_gpio_set_debounce
pinctrl: imx: Kconfig: PINCTRL_IMX select REGMAP
- Cache invalidation fix for early CPU boot status update (incorrect
cacheline)
- of_put_node() missing in the spin_table code
- EL1/El2 early init inconsistency when Virtualisation Host Extensions
are present
- RCU warning fix in the arm_pmu.c driver
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- Cache invalidation fix for early CPU boot status update (incorrect
cacheline)
- of_put_node() missing in the spin_table code
- EL1/El2 early init inconsistency when Virtualisation Host Extensions
are present
- RCU warning fix in the arm_pmu.c driver
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Fix EL1/EL2 early init inconsistencies with VHE
drivers/perf: arm-pmu: fix RCU usage on pmu resume from low-power
arm64: spin-table: add missing of_node_put()
arm64: fix invalidation of wrong __early_cpu_boot_status cacheline
- scan_features() updates incorrect bits for REAL_LE from Anton Blanchard
- Update cpu_user_features2 in scan_features() from Anton Blanchard
- Update TM user feature bits in scan_features() from Anton Blanchard
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Merge tag 'powerpc-4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Three powerpc cpu feature fixes from Anton Blanchard:
- scan_features() updated incorrect bits for REAL_LE
- update cpu_user_features2 in scan_features()
- update TM user feature bits in scan_features()"
* tag 'powerpc-4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc: Update TM user feature bits in scan_features()
powerpc: Update cpu_user_features2 in scan_features()
powerpc: scan_features() updates incorrect bits for REAL_LE
The fixes include:
* Two patches to revert the use of default domains in the ARM
SMMU driver. Enabling this caused regressions which need more
thorough fixing. So the regressions are fixed for now by
disabling the use of default domains.
* A fix for a v4.4 regression in the AMD IOMMU driver which
broke devices behind invisible PCIe-to-PCI bridges with IOMMU
enabled.
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Merge tag 'iommu-fixes-v4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
"The fixes include:
- Two patches to revert the use of default domains in the ARM SMMU
driver. Enabling this caused regressions which need more thorough
fixing. So the regressions are fixed for now by disabling the use
of default domains.
- A fix for a v4.4 regression in the AMD IOMMU driver which broke
devices behind invisible PCIe-to-PCI bridges with IOMMU enabled"
* tag 'iommu-fixes-v4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/arm-smmu: Don't allocate resources for bypass domains
iommu/arm-smmu: Fix stream-match conflict with IOMMU_DOMAIN_DMA
iommu/amd: Fix checking of pci dma aliases
Pull drm fixes from Dave Airlie:
"i915, nouveau and amdgpu/radeon fixes in this:
nouveau:
Two fixes, one for a regression with dithering and one for a bug
hit by the userspace drivers.
i915:
A few fixes, mostly things heading for stable, two important
skylake GT3/4 hangs.
radeon/amdgpu:
Some audio, suspend/resume and some runtime PM fixes, along with
two patches to harden the userptr ABI a bit"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (24 commits)
drm: Loongson-3 doesn't fully support wc memory
drm/nouveau/gr/gf100: select a stream master to fixup tfb offset queries
amdgpu/uvd: add uvd fw version for amdgpu
drm/amdgpu: forbid mapping of userptr bo through radeon device file
drm/radeon: forbid mapping of userptr bo through radeon device file
drm/amdgpu: bump the afmt limit for CZ, ST, Polaris
drm/amdgpu: use defines for CRTCs and AMFT blocks
drm/dp/mst: Validate port in drm_dp_payload_send_msg()
drm/nouveau/kms: fix setting of default values for dithering properties
drm/radeon: print a message if ATPX dGPU power control is missing
Revert "drm/radeon: disable runtime pm on PX laptops without dGPU power control"
drm/amdgpu/acp: fix resume on CZ systems with AZ audio
drm/radeon: add a quirk for a XFX R9 270X
drm/radeon: print pci revision as well as pci ids on driver load
drm/i915: Use fw_domains_put_with_fifo() on HSW
drm/i915: Force ringbuffers to not be at offset 0
drm/i915: Adjust size of PIPE_CONTROL used for gen8 render seqno write
drm/i915/skl: Fix spurious gpu hang with gt3/gt4 revs
drm/i915/skl: Fix rc6 based gpu/system hang
drm/i915/userptr: Hold mmref whilst calling get-user-pages
...
Again a relatively calm week without surprise: most of fixes are about
HD-audio, including fixes for Cirrus codec regression and a race over
regmap access. Although both change are slightly unintuitive, the
risk of further breakage is quite low, I hope.
Other than that, all the rest are trivial.
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Merge tag 'sound-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Again a relatively calm week without surprise: most of fixes are about
HD-audio, including fixes for Cirrus codec regression and a race over
regmap access. Although both change are slightly unintuitive, the
risk of further breakage is quite low, I hope.
Other than that, all the rest are trivial"
* tag 'sound-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Fix possible race on regmap bypass flip
ALSA: pcxhr: Fix missing mutex unlock
ALSA: hda - add PCI ID for Intel Broxton-T
ALSA: hda - Keep powering up ADCs on Cirrus codecs
ALSA: hda/realtek - Add ALC3234 headset mode for Optiplex 9020m
ALSA - hda: hdmi check NULL pointer in hdmi_set_chmap
ALSA: hda - Don't trust the reported actual power state
*) make rockchip-dp and rockchip-emmc PHY child device of
GRF
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Merge tag 'phy-for-4.6-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy into usb-linus
Kishon writes:
phy: for 4.6-rc
*) make rockchip-dp and rockchip-emmc PHY child device of
GRF
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
