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Pull more SCSI updates from James Bottomley:
"The vfs has long had a write lifetime hint mechanism that gives the
expected longevity on storage of the data being written. f2fs was the
original consumer of this and used the hint for flash data placement
(mostly to avoid write amplification by placing objects with similar
lifetimes in the same erase block).
More recently the SCSI based UFS (Universal Flash Storage) drivers
have wanted to take advantage of this as well, for the same reasons as
f2fs, necessitating plumbing the write hints through the block layer
and then adding it to the SCSI core.
The vfs write_hints already taken plumbs this as far as block and this
completes the SCSI core enabling based on a recently agreed reuse of
the old write command group number. The additions to the scsi_debug
driver are for emulating this property so we can run tests on it in
the absence of an actual UFS device"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: scsi_debug: Maintain write statistics per group number
scsi: scsi_debug: Implement GET STREAM STATUS
scsi: scsi_debug: Implement the IO Advice Hints Grouping mode page
scsi: scsi_debug: Allocate the MODE SENSE response from the heap
scsi: scsi_debug: Rework subpage code error handling
scsi: scsi_debug: Rework page code error handling
scsi: scsi_debug: Support the block limits extension VPD page
scsi: scsi_debug: Reduce code duplication
scsi: sd: Translate data lifetime information
scsi: scsi_proto: Add structures and constants related to I/O groups and streams
scsi: core: Query the Block Limits Extension VPD page
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Prepare for adding code that will query the I/O advice hints group
descriptors and for adding code that will retrieve the stream status.
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240130214911.1863909-11-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Parse the Reduced Stream Control Supported (RSCS) bit from the block limits
extension VPD page. The RSCS bit is defined in SBC-5 r05
(https://www.t10.org/cgi-bin/ac.pl?t=f&f=sbc5r05.pdf).
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240130214911.1863909-10-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Palmer Dabbelt:
- Support for various vector-accelerated crypto routines
- Hibernation is now enabled for portable kernel builds
- mmap_rnd_bits_max is larger on systems with larger VAs
- Support for fast GUP
- Support for membarrier-based instruction cache synchronization
- Support for the Andes hart-level interrupt controller and PMU
- Some cleanups around unaligned access speed probing and Kconfig
settings
- Support for ACPI LPI and CPPC
- Various cleanus related to barriers
- A handful of fixes
* tag 'riscv-for-linus-6.9-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (66 commits)
riscv: Fix syscall wrapper for >word-size arguments
crypto: riscv - add vector crypto accelerated AES-CBC-CTS
crypto: riscv - parallelize AES-CBC decryption
riscv: Only flush the mm icache when setting an exec pte
riscv: Use kcalloc() instead of kzalloc()
riscv/barrier: Add missing space after ','
riscv/barrier: Consolidate fence definitions
riscv/barrier: Define RISCV_FULL_BARRIER
riscv/barrier: Define __{mb,rmb,wmb}
RISC-V: defconfig: Enable CONFIG_ACPI_CPPC_CPUFREQ
cpufreq: Move CPPC configs to common Kconfig and add RISC-V
ACPI: RISC-V: Add CPPC driver
ACPI: Enable ACPI_PROCESSOR for RISC-V
ACPI: RISC-V: Add LPI driver
cpuidle: RISC-V: Move few functions to arch/riscv
riscv: Introduce set_compat_task() in asm/compat.h
riscv: Introduce is_compat_thread() into compat.h
riscv: add compile-time test into is_compat_task()
riscv: Replace direct thread flag check with is_compat_task()
riscv: Improve arch_get_mmap_end() macro
...
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tip/tip into for-next
INTC changes to consume for RISCV
* tag 'irq-for-riscv-02-23-24' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/riscv-intc: Introduce Andes hart-level interrupt controller
irqchip/riscv-intc: Allow large non-standard interrupt number
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RISC-V was lacking a membarrier implementation for the store/fetch
ordering, which is a bit tricky because of the deferred icache flushing
we use in RISC-V.
* b4-shazam-merge:
membarrier: riscv: Provide core serializing command
locking: Introduce prepare_sync_core_cmd()
membarrier: Create Documentation/scheduler/membarrier.rst
membarrier: riscv: Add full memory barrier in switch_mm()
Link: https://lore.kernel.org/r/20240131144936.29190-1-parri.andrea@gmail.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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Introduce an architecture function that architectures can use to set
up ("prepare") SYNC_CORE commands.
The function will be used by RISC-V to update its "deferred icache-
flush" data structures (icache_stale_mask).
Architectures defining prepare_sync_core_cmd() static inline need to
select ARCH_HAS_PREPARE_SYNC_CORE_CMD.
Suggested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/r/20240131144936.29190-4-parri.andrea@gmail.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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There's code duplication between the fallback implementation for bitops
__ffs/__fls/ffs/fls API and the generic C implementation in
include/asm-generic/bitops/. To avoid this duplication, this patch renames
the generic C implementation by adding a "generic_" prefix to them, then we
can use these generic APIs as fallback.
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
Link: https://lore.kernel.org/r/20231112094421.4014931-1-xiao.w.wang@intel.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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Allow mmap_rnd_bits_max to be updated on architectures that
determine virtual address space size at runtime instead of relying
on Kconfig options by changing it from const to __ro_after_init.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/20230929211155.3910949-5-samitolvanen@google.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch updates from Huacai Chen:
- Add objtool support for LoongArch
- Add ORC stack unwinder support for LoongArch
- Add kernel livepatching support for LoongArch
- Select ARCH_HAS_CURRENT_STACK_POINTER in Kconfig
- Select HAVE_ARCH_USERFAULTFD_MINOR in Kconfig
- Some bug fixes and other small changes
* tag 'loongarch-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
LoongArch/crypto: Clean up useless assignment operations
LoongArch: Define the __io_aw() hook as mmiowb()
LoongArch: Remove superfluous flush_dcache_page() definition
LoongArch: Move {dmw,tlb}_virt_to_page() definition to page.h
LoongArch: Change __my_cpu_offset definition to avoid mis-optimization
LoongArch: Select HAVE_ARCH_USERFAULTFD_MINOR in Kconfig
LoongArch: Select ARCH_HAS_CURRENT_STACK_POINTER in Kconfig
LoongArch: Add kernel livepatching support
LoongArch: Add ORC stack unwinder support
objtool: Check local label in read_unwind_hints()
objtool: Check local label in add_dead_ends()
objtool/LoongArch: Enable orc to be built
objtool/x86: Separate arch-specific and generic parts
objtool/LoongArch: Implement instruction decoder
objtool/LoongArch: Enable objtool to be built
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The kernel CONFIG_UNWINDER_ORC option enables the ORC unwinder, which is
similar in concept to a DWARF unwinder. The difference is that the format
of the ORC data is much simpler than DWARF, which in turn allows the ORC
unwinder to be much simpler and faster.
The ORC data consists of unwind tables which are generated by objtool.
After analyzing all the code paths of a .o file, it determines information
about the stack state at each instruction address in the file and outputs
that information to the .orc_unwind and .orc_unwind_ip sections.
The per-object ORC sections are combined at link time and are sorted and
post-processed at boot time. The unwinder uses the resulting data to
correlate instruction addresses with their stack states at run time.
Most of the logic are similar with x86, in order to get ra info before ra
is saved into stack, add ra_reg and ra_offset into orc_entry. At the same
time, modify some arch-specific code to silence the objtool warnings.
Co-developed-by: Jinyang He <hejinyang@loongson.cn>
Signed-off-by: Jinyang He <hejinyang@loongson.cn>
Co-developed-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev
Pull fbdev updates from Helge Deller:
- Allow console fonts up to 64x128 pixels (Samuel Thibault)
- Prevent division-by-zero in fb monitor code (Roman Smirnov)
- Drop Renesas ARM platforms from Mobile LCDC framebuffer driver (Geert
Uytterhoeven)
- Various code cleanups in viafb, uveafb and mb862xxfb drivers by
Aleksandr Burakov, Li Zhijian and Michael Ellerman
* tag 'fbdev-for-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
fbdev: panel-tpo-td043mtea1: Convert sprintf() to sysfs_emit()
fbmon: prevent division by zero in fb_videomode_from_videomode()
fbcon: Increase maximum font width x height to 64 x 128
fbdev: viafb: fix typo in hw_bitblt_1 and hw_bitblt_2
fbdev: mb862xxfb: Fix defined but not used error
fbdev: uvesafb: Convert sprintf/snprintf to sysfs_emit
fbdev: Restrict FB_SH_MOBILE_LCDC to SuperH
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By using bitmaps we actually support whatever size we would want, but
the console currently limits fonts to 64x128 (which gives 60x16 text on
4k screens), so we don't need more for now, and we can easily increase
later.
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Helge Deller <deller@gmx.de>
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Pull drm fixes from Dave Airlie:
"Fixes from the last week (or 3 weeks in amdgpu case), after amdgpu,
it's xe and nouveau then a few scattered core fixes.
core:
- fix rounding in drm_fixp2int_round()
bridge:
- fix documentation for DRM_BRIDGE_OP_EDID
sun4i:
- fix 64-bit division on 32-bit architectures
tests:
- fix dependency on DRM_KMS_HELPER
probe-helper:
- never return negative values from .get_modes() plus driver fixes
xe:
- invalidate userptr vma on page pin fault
- fail early on sysfs file creation error
- skip VMA pinning on xe_exec if no batches
nouveau:
- clear bo resource bus after eviction
- documentation fixes
- don't check devinit disable on GSP
amdgpu:
- Freesync fixes
- UAF IOCTL fixes
- Fix mmhub client ID mapping
- IH 7.0 fix
- DML2 fixes
- VCN 4.0.6 fix
- GART bind fix
- GPU reset fix
- SR-IOV fix
- OD table handling fixes
- Fix TA handling on boards without display hardware
- DML1 fix
- ABM fix
- eDP panel fix
- DPPCLK fix
- HDCP fix
- Revert incorrect error case handling in ioremap
- VPE fix
- HDMI fixes
- SDMA 4.4.2 fix
- Other misc fixes
amdkfd:
- Fix duplicate BO handling in process restore"
* tag 'drm-next-2024-03-22' of https://gitlab.freedesktop.org/drm/kernel: (50 commits)
drm/amdgpu/pm: Don't use OD table on Arcturus
drm/amdgpu: drop setting buffer funcs in sdma442
drm/amd/display: Fix noise issue on HDMI AV mute
drm/amd/display: Revert Remove pixle rate limit for subvp
Revert "drm/amdgpu/vpe: don't emit cond exec command under collaborate mode"
Revert "drm/amd/amdgpu: Fix potential ioremap() memory leaks in amdgpu_device_init()"
drm/amd/display: Add a dc_state NULL check in dc_state_release
drm/amd/display: Return the correct HDCP error code
drm/amd/display: Implement wait_for_odm_update_pending_complete
drm/amd/display: Lock all enabled otg pipes even with no planes
drm/amd/display: Amend coasting vtotal for replay low hz
drm/amd/display: Fix idle check for shared firmware state
drm/amd/display: Update odm when ODM combine is changed on an otg master pipe with no plane
drm/amd/display: Init DPPCLK from SMU on dcn32
drm/amd/display: Add monitor patch for specific eDP
drm/amd/display: Allow dirty rects to be sent to dmub when abm is active
drm/amd/display: Override min required DCFCLK in dml1_validate
drm/amdgpu: Bypass display ta if display hw is not available
drm/amdgpu: correct the KGQ fallback message
drm/amdgpu/pm: Check the validity of overdiver power limit
...
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https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
Short summary of fixes pull:
core:
- fix rounding in drm_fixp2int_round()
bridge:
- fix documentation for DRM_BRIDGE_OP_EDID
nouveau:
- don't check devinit disable on GSP
sun4i:
- fix 64-bit division on 32-bit architectures
tests:
- fix dependency on DRM_KMS_HELPER
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240321161948.GA30430@linux.fritz.box
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As well noted by Pekka[1], the rounding of drm_fixp2int_round is wrong.
To round a number, you need to add 0.5 to the number and floor that,
drm_fixp2int_round() is adding 0.0000076. Make it add 0.5.
[1]: https://lore.kernel.org/all/20240301135327.22efe0dd.pekka.paalanen@collabora.com/
Fixes: 8b25320887d7 ("drm: Add fixed-point helper to get rounded integer values")
Suggested-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Arthur Grillo <arthurgrillo@riseup.net>
Signed-off-by: Melissa Wen <melissa.srw@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240316-drm_fixed-v2-1-c1bc2665b5ed@riseup.net
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While the commit d807ad80d811 ("drm/bridge: add ->edid_read hook and
drm_bridge_edid_read()") and the commit 27b8f91c08d9 ("drm/bridge:
remove ->get_edid callback") replaced ->get_edid() callback with the
->edid_read(), they failed to update documentation. Fix the drm_bridge
docs to point to edid_read().
Fixes: 27b8f91c08d9 ("drm/bridge: remove ->get_edid callback")
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240310-drm-bridge-fix-docs-v1-1-70d3d741cb7a@linaro.org
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https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
Short summary of fixes pull:
probe-helper:
- never return negative values from .get_modes() plus driver fixes
nouveau:
- clear bo resource bus after eviction
- documentation fixes
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240314082833.GA8761@localhost.localdomain
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The .get_modes() callback is supposed to return the number of modes,
never a negative error code. If a negative value is returned, it'll just
be interpreted as a negative count, and added to previous calculations.
Document the rules, but handle the negative values gracefully with an
error message.
Cc: stable@vger.kernel.org
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/50208c866facc33226a3c77b82bb96aeef8ef310.1709913674.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"Subsytem:
- rtc_class is now const
Drivers:
- ds1511: cleanup, set date and time range and alarm offset limit
- max31335: fix interrupt handler
- pcf8523: improve suspend support"
* tag 'rtc-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (28 commits)
MAINTAINER: Include linux-arm-msm for Qualcomm RTC patches
dt-bindings: rtc: zynqmp: Add support for Versal/Versal NET SoCs
rtc: class: make rtc_class constant
dt-bindings: rtc: abx80x: Improve checks on trickle charger constraints
MAINTAINERS: adjust file entry in ARM/Mediatek RTC DRIVER
rtc: nct3018y: fix possible NULL dereference
rtc: max31335: fix interrupt status reg
rtc: mt6397: select IRQ_DOMAIN instead of depending on it
dt-bindings: rtc: abx80x: convert to yaml
rtc: m41t80: Use the unified property API get the wakeup-source property
dt-bindings: at91rm9260-rtt: add sam9x7 compatible
dt-bindings: rtc: convert MT7622 RTC to the json-schema
dt-bindings: rtc: convert MT2717 RTC to the json-schema
rtc: pcf8523: add suspend handlers for alarm IRQ
rtc: ds1511: set alarm offset limit
rtc: ds1511: set range
rtc: ds1511: drop inline/noinline hints
rtc: ds1511: rename pdata
rtc: ds1511: implement ds1511_rtc_read_alarm properly
rtc: ds1511: remove partial alarm support
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Since commit 43a7206b0963 ("driver core: class: make class_register() take
a const *"), the driver core allows for struct class to be in read-only
memory, so move the rtc_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at boot time.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
Link: https://lore.kernel.org/r/20240305-class_cleanup-abelloni-v1-1-944c026137c8@marliere.net
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBI and UBIFS updates from Richard Weinberger:
"UBI:
- Add Zhihao Cheng as reviewer
- Attach via device tree
- Add NVMEM layer
- Various fastmap related fixes
UBIFS:
- Add Zhihao Cheng as reviewer
- Convert to folios
- Various fixes (memory leaks in error paths, function prototypes)"
* tag 'ubifs-for-linus-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: (34 commits)
mtd: ubi: fix NVMEM over UBI volumes on 32-bit systems
mtd: ubi: provide NVMEM layer over UBI volumes
mtd: ubi: populate ubi volume fwnode
mtd: ubi: introduce pre-removal notification for UBI volumes
mtd: ubi: attach from device tree
mtd: ubi: block: use notifier to create ubiblock from parameter
dt-bindings: mtd: ubi-volume: allow UBI volumes to provide NVMEM
dt-bindings: mtd: add basic bindings for UBI
ubifs: Queue up space reservation tasks if retrying many times
ubifs: ubifs_symlink: Fix memleak of inode->i_link in error path
ubifs: dbg_check_idx_size: Fix kmemleak if loading znode failed
ubi: Correct the number of PEBs after a volume resize failure
ubi: fix slab-out-of-bounds in ubi_eba_get_ldesc+0xfb/0x130
ubi: correct the calculation of fastmap size
ubifs: Remove unreachable code in dbg_check_ltab_lnum
ubifs: fix function pointer cast warnings
ubifs: fix sort function prototype
ubi: Check for too small LEB size in VTBL code
MAINTAINERS: Add Zhihao Cheng as UBI/UBIFS reviewer
ubifs: Convert populate_page() to take a folio
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Introduce a new notification type UBI_VOLUME_SHUTDOWN to inform users
that a volume is just about to be removed.
This is needed because users (such as the NVMEM subsystem) expect that
at the time their removal function is called, the parenting device is
still available (for removal of sysfs nodes, for example, in case of
NVMEM which otherwise WARNs on volume removal).
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from CAN, netfilter, wireguard and IPsec.
I'd like to highlight [ lowlight? - Linus ] Florian W stepping down as
a netfilter maintainer due to constant stream of bug reports. Not sure
what we can do but IIUC this is not the first such case.
Current release - regressions:
- rxrpc: fix use of page_frag_alloc_align(), it changed semantics and
we added a new caller in a different subtree
- xfrm: allow UDP encapsulation only in offload modes
Current release - new code bugs:
- tcp: fix refcnt handling in __inet_hash_connect()
- Revert "net: Re-use and set mono_delivery_time bit for userspace
tstamp packets", conflicted with some expectations in BPF uAPI
Previous releases - regressions:
- ipv4: raw: fix sending packets from raw sockets via IPsec tunnels
- devlink: fix devlink's parallel command processing
- veth: do not manipulate GRO when using XDP
- esp: fix bad handling of pages from page_pool
Previous releases - always broken:
- report RCU QS for busy network kthreads (with Paul McK's blessing)
- tcp/rds: fix use-after-free on netns with kernel TCP reqsk
- virt: vmxnet3: fix missing reserved tailroom with XDP
Misc:
- couple of build fixes for Documentation"
* tag 'net-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (59 commits)
selftests: forwarding: Fix ping failure due to short timeout
MAINTAINERS: step down as netfilter maintainer
netfilter: nf_tables: Fix a memory leak in nf_tables_updchain
net: dsa: mt7530: fix handling of all link-local frames
net: dsa: mt7530: fix link-local frames that ingress vlan filtering ports
bpf: report RCU QS in cpumap kthread
net: report RCU QS on threaded NAPI repolling
rcu: add a helper to report consolidated flavor QS
ionic: update documentation for XDP support
lib/bitmap: Fix bitmap_scatter() and bitmap_gather() kernel doc
netfilter: nf_tables: do not compare internal table flags on updates
netfilter: nft_set_pipapo: release elements in clone only from destroy path
octeontx2-af: Use separate handlers for interrupts
octeontx2-pf: Send UP messages to VF only when VF is up.
octeontx2-pf: Use default max_active works instead of one
octeontx2-pf: Wait till detach_resources msg is complete
octeontx2: Detect the mbox up or down message via register
devlink: fix port new reply cmd type
tcp: Clear req->syncookie in reqsk_alloc().
net/bnx2x: Prevent access to a freed page in page_pool
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When under heavy load, network processing can run CPU-bound for many
tens of seconds. Even in preemptible kernels (non-RT kernel), this can
block RCU Tasks grace periods, which can cause trace-event removal to
take more than a minute, which is unacceptably long.
This commit therefore creates a new helper function that passes through
both RCU and RCU-Tasks quiescent states every 100 milliseconds. This
hard-coded value suffices for current workloads.
Suggested-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: Yan Zhai <yan@cloudflare.com>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Link: https://lore.kernel.org/r/90431d46ee112d2b0af04dbfe936faaca11810a5.1710877680.git.yan@cloudflare.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The make htmldoc command failed with the following error
... include/linux/bitmap.h:524: ERROR: Unexpected indentation.
... include/linux/bitmap.h:524: CRITICAL: Unexpected section title or transition.
Move the visual representation to a literal block.
Fixes: de5f84338970 ("lib/bitmap: Introduce bitmap_scatter() and bitmap_gather() helpers")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/linux-kernel/20240312153059.3ffde1b7@canb.auug.org.au/
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Acked-by: Yury Norov <yury.norov@gmail.com>
Link: https://lore.kernel.org/r/20240314120006.458580-1-herve.codina@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec
Steffen Klassert says:
====================
pull request (net): ipsec 2024-03-19
1) Fix possible page_pool leak triggered by esp_output.
From Dragos Tatulea.
2) Fix UDP encapsulation in software GSO path.
From Leon Romanovsky.
* tag 'ipsec-2024-03-19' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec:
xfrm: Allow UDP encapsulation only in offload modes
net: esp: fix bad handling of pages from page_pool
====================
Link: https://lore.kernel.org/r/20240319110151.409825-1-steffen.klassert@secunet.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When the skb is reorganized during esp_output (!esp->inline), the pages
coming from the original skb fragments are supposed to be released back
to the system through put_page. But if the skb fragment pages are
originating from a page_pool, calling put_page on them will trigger a
page_pool leak which will eventually result in a crash.
This leak can be easily observed when using CONFIG_DEBUG_VM and doing
ipsec + gre (non offloaded) forwarding:
BUG: Bad page state in process ksoftirqd/16 pfn:1451b6
page:00000000de2b8d32 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1451b6000 pfn:0x1451b6
flags: 0x200000000000000(node=0|zone=2)
page_type: 0xffffffff()
raw: 0200000000000000 dead000000000040 ffff88810d23c000 0000000000000000
raw: 00000001451b6000 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
Modules linked in: ip_gre gre mlx5_ib mlx5_core xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat nf_nat xt_addrtype br_netfilter rpcrdma rdma_ucm ib_iser libiscsi scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm ib_cm ib_uverbs ib_core overlay zram zsmalloc fuse [last unloaded: mlx5_core]
CPU: 16 PID: 96 Comm: ksoftirqd/16 Not tainted 6.8.0-rc4+ #22
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x36/0x50
bad_page+0x70/0xf0
free_unref_page_prepare+0x27a/0x460
free_unref_page+0x38/0x120
esp_ssg_unref.isra.0+0x15f/0x200
esp_output_tail+0x66d/0x780
esp_xmit+0x2c5/0x360
validate_xmit_xfrm+0x313/0x370
? validate_xmit_skb+0x1d/0x330
validate_xmit_skb_list+0x4c/0x70
sch_direct_xmit+0x23e/0x350
__dev_queue_xmit+0x337/0xba0
? nf_hook_slow+0x3f/0xd0
ip_finish_output2+0x25e/0x580
iptunnel_xmit+0x19b/0x240
ip_tunnel_xmit+0x5fb/0xb60
ipgre_xmit+0x14d/0x280 [ip_gre]
dev_hard_start_xmit+0xc3/0x1c0
__dev_queue_xmit+0x208/0xba0
? nf_hook_slow+0x3f/0xd0
ip_finish_output2+0x1ca/0x580
ip_sublist_rcv_finish+0x32/0x40
ip_sublist_rcv+0x1b2/0x1f0
? ip_rcv_finish_core.constprop.0+0x460/0x460
ip_list_rcv+0x103/0x130
__netif_receive_skb_list_core+0x181/0x1e0
netif_receive_skb_list_internal+0x1b3/0x2c0
napi_gro_receive+0xc8/0x200
gro_cell_poll+0x52/0x90
__napi_poll+0x25/0x1a0
net_rx_action+0x28e/0x300
__do_softirq+0xc3/0x276
? sort_range+0x20/0x20
run_ksoftirqd+0x1e/0x30
smpboot_thread_fn+0xa6/0x130
kthread+0xcd/0x100
? kthread_complete_and_exit+0x20/0x20
ret_from_fork+0x31/0x50
? kthread_complete_and_exit+0x20/0x20
ret_from_fork_asm+0x11/0x20
</TASK>
The suggested fix is to introduce a new wrapper (skb_page_unref) that
covers page refcounting for page_pool pages as well.
Cc: stable@vger.kernel.org
Fixes: 6a5bcd84e886 ("page_pool: Allow drivers to hint on SKB recycling")
Reported-and-tested-by: Anatoli N.Chechelnickiy <Anatoli.Chechelnickiy@m.interpipe.biz>
Reported-by: Ian Kumlien <ian.kumlien@gmail.com>
Link: https://lore.kernel.org/netdev/CAA85sZvvHtrpTQRqdaOx6gd55zPAVsqMYk_Lwh4Md5knTq7AyA@mail.gmail.com
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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syzkaller reported a read of uninit req->syncookie. [0]
Originally, req->syncookie was used only in tcp_conn_request()
to indicate if we need to encode SYN cookie in SYN+ACK, so the
field remains uninitialised in other places.
The commit 695751e31a63 ("bpf: tcp: Handle BPF SYN Cookie in
cookie_v[46]_check().") added another meaning in ACK path;
req->syncookie is set true if SYN cookie is validated by BPF
kfunc.
After the change, cookie_v[46]_check() always read req->syncookie,
but it is not initialised in the normal SYN cookie case as reported
by KMSAN.
Let's make sure we always initialise req->syncookie in reqsk_alloc().
[0]:
BUG: KMSAN: uninit-value in cookie_v4_check+0x22b7/0x29e0
net/ipv4/syncookies.c:477
cookie_v4_check+0x22b7/0x29e0 net/ipv4/syncookies.c:477
tcp_v4_cookie_check net/ipv4/tcp_ipv4.c:1855 [inline]
tcp_v4_do_rcv+0xb17/0x10b0 net/ipv4/tcp_ipv4.c:1914
tcp_v4_rcv+0x4ce4/0x5420 net/ipv4/tcp_ipv4.c:2322
ip_protocol_deliver_rcu+0x2a3/0x13d0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x332/0x500 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:460 [inline]
ip_rcv_finish+0x4a2/0x520 net/ipv4/ip_input.c:449
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_rcv+0xcd/0x380 net/ipv4/ip_input.c:569
__netif_receive_skb_one_core net/core/dev.c:5538 [inline]
__netif_receive_skb+0x319/0x9e0 net/core/dev.c:5652
process_backlog+0x480/0x8b0 net/core/dev.c:5981
__napi_poll+0xe7/0x980 net/core/dev.c:6632
napi_poll net/core/dev.c:6701 [inline]
net_rx_action+0x89d/0x1820 net/core/dev.c:6813
__do_softirq+0x1c0/0x7d7 kernel/softirq.c:554
do_softirq+0x9a/0x100 kernel/softirq.c:455
__local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:382
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:820 [inline]
__dev_queue_xmit+0x2776/0x52c0 net/core/dev.c:4362
dev_queue_xmit include/linux/netdevice.h:3091 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip_finish_output2+0x187a/0x1b70 net/ipv4/ip_output.c:235
__ip_finish_output+0x287/0x810
ip_finish_output+0x4b/0x550 net/ipv4/ip_output.c:323
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip_output+0x15f/0x3f0 net/ipv4/ip_output.c:433
dst_output include/net/dst.h:450 [inline]
ip_local_out net/ipv4/ip_output.c:129 [inline]
__ip_queue_xmit+0x1e93/0x2030 net/ipv4/ip_output.c:535
ip_queue_xmit+0x60/0x80 net/ipv4/ip_output.c:549
__tcp_transmit_skb+0x3c70/0x4890 net/ipv4/tcp_output.c:1462
tcp_transmit_skb net/ipv4/tcp_output.c:1480 [inline]
tcp_write_xmit+0x3ee1/0x8900 net/ipv4/tcp_output.c:2792
__tcp_push_pending_frames net/ipv4/tcp_output.c:2977 [inline]
tcp_send_fin+0xa90/0x12e0 net/ipv4/tcp_output.c:3578
tcp_shutdown+0x198/0x1f0 net/ipv4/tcp.c:2716
inet_shutdown+0x33f/0x5b0 net/ipv4/af_inet.c:923
__sys_shutdown_sock net/socket.c:2425 [inline]
__sys_shutdown net/socket.c:2437 [inline]
__do_sys_shutdown net/socket.c:2445 [inline]
__se_sys_shutdown+0x2a4/0x440 net/socket.c:2443
__x64_sys_shutdown+0x6c/0xa0 net/socket.c:2443
do_syscall_64+0xd5/0x1f0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Uninit was stored to memory at:
reqsk_alloc include/net/request_sock.h:148 [inline]
inet_reqsk_alloc+0x651/0x7a0 net/ipv4/tcp_input.c:6978
cookie_tcp_reqsk_alloc+0xd4/0x900 net/ipv4/syncookies.c:328
cookie_tcp_check net/ipv4/syncookies.c:388 [inline]
cookie_v4_check+0x289f/0x29e0 net/ipv4/syncookies.c:420
tcp_v4_cookie_check net/ipv4/tcp_ipv4.c:1855 [inline]
tcp_v4_do_rcv+0xb17/0x10b0 net/ipv4/tcp_ipv4.c:1914
tcp_v4_rcv+0x4ce4/0x5420 net/ipv4/tcp_ipv4.c:2322
ip_protocol_deliver_rcu+0x2a3/0x13d0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x332/0x500 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:460 [inline]
ip_rcv_finish+0x4a2/0x520 net/ipv4/ip_input.c:449
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_rcv+0xcd/0x380 net/ipv4/ip_input.c:569
__netif_receive_skb_one_core net/core/dev.c:5538 [inline]
__netif_receive_skb+0x319/0x9e0 net/core/dev.c:5652
process_backlog+0x480/0x8b0 net/core/dev.c:5981
__napi_poll+0xe7/0x980 net/core/dev.c:6632
napi_poll net/core/dev.c:6701 [inline]
net_rx_action+0x89d/0x1820 net/core/dev.c:6813
__do_softirq+0x1c0/0x7d7 kernel/softirq.c:554
Uninit was created at:
__alloc_pages+0x9a7/0xe00 mm/page_alloc.c:4592
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page mm/slub.c:2175 [inline]
allocate_slab mm/slub.c:2338 [inline]
new_slab+0x2de/0x1400 mm/slub.c:2391
___slab_alloc+0x1184/0x33d0 mm/slub.c:3525
__slab_alloc mm/slub.c:3610 [inline]
__slab_alloc_node mm/slub.c:3663 [inline]
slab_alloc_node mm/slub.c:3835 [inline]
kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852
reqsk_alloc include/net/request_sock.h:131 [inline]
inet_reqsk_alloc+0x66/0x7a0 net/ipv4/tcp_input.c:6978
tcp_conn_request+0x484/0x44e0 net/ipv4/tcp_input.c:7135
tcp_v4_conn_request+0x16f/0x1d0 net/ipv4/tcp_ipv4.c:1716
tcp_rcv_state_process+0x2e5/0x4bb0 net/ipv4/tcp_input.c:6655
tcp_v4_do_rcv+0xbfd/0x10b0 net/ipv4/tcp_ipv4.c:1929
tcp_v4_rcv+0x4ce4/0x5420 net/ipv4/tcp_ipv4.c:2322
ip_protocol_deliver_rcu+0x2a3/0x13d0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x332/0x500 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:460 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:631 [inline]
ip_sublist_rcv+0x15f3/0x17f0 net/ipv4/ip_input.c:639
ip_list_rcv+0x9ef/0xa40 net/ipv4/ip_input.c:674
__netif_receive_skb_list_ptype net/core/dev.c:5581 [inline]
__netif_receive_skb_list_core+0x15c5/0x1670 net/core/dev.c:5629
__netif_receive_skb_list net/core/dev.c:5681 [inline]
netif_receive_skb_list_internal+0x106c/0x16f0 net/core/dev.c:5773
gro_normal_list include/net/gro.h:438 [inline]
napi_complete_done+0x425/0x880 net/core/dev.c:6113
virtqueue_napi_complete drivers/net/virtio_net.c:465 [inline]
virtnet_poll+0x149d/0x2240 drivers/net/virtio_net.c:2211
__napi_poll+0xe7/0x980 net/core/dev.c:6632
napi_poll net/core/dev.c:6701 [inline]
net_rx_action+0x89d/0x1820 net/core/dev.c:6813
__do_softirq+0x1c0/0x7d7 kernel/softirq.c:554
CPU: 0 PID: 16792 Comm: syz-executor.2 Not tainted 6.8.0-syzkaller-05562-g61387b8dcf1d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Fixes: 695751e31a63 ("bpf: tcp: Handle BPF SYN Cookie in cookie_v[46]_check().")
Reported-by: syzkaller <syzkaller@googlegroups.com>
Reported-by: Eric Dumazet <edumazet@google.com>
Closes: https://lore.kernel.org/bpf/CANn89iKdN9c+C_2JAUbc+VY3DDQjAQukMtiBbormAmAk9CdvQA@mail.gmail.com/
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20240315224710.55209-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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dev->state can be read in rx and tx fast paths.
netif_running() which needs dev->state is called from
- enqueue_to_backlog() [RX path]
- __dev_direct_xmit() [TX path]
Fixes: 43a71cd66b9c ("net-device: reorganize net_device fast path variables")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Coco Li <lixiaoyan@google.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240314200845.3050179-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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This reverts commit 885c36e59f46375c138de18ff1692f18eff67b7f.
The patch currently broke the bpf selftest test_tc_dtime because
uapi field __sk_buff->tstamp_type depends on skb->mono_delivery_time which
does not necessarily mean mono with the original fix as the bit was re-used
for userspace timestamp as well to avoid tstamp reset in the forwarding
path. To solve this we need to keep mono_delivery_time as is and
introduce another bit called user_delivery_time and fall back to the
initial proposal of setting the user_delivery_time bit based on
sk_clockid set from userspace.
Fixes: 885c36e59f46 ("net: Re-use and set mono_delivery_time bit for userspace tstamp packets")
Link: https://lore.kernel.org/netdev/bc037db4-58bb-4861-ac31-a361a93841d3@linux.dev/
Signed-off-by: Abhishek Chauhan <quic_abchauha@quicinc.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The only user of these was io_uring, and it's not using them anymore.
Make them static and remove them from the socket header file.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/1b6089d3-c1cf-464a-abd3-b0f0b6bb2523@kernel.dk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Generate a list of built DTB files (arch/*/boot/dts/dtbs-list)
- Use more threads when building Debian packages in parallel
- Fix warnings shown during the RPM kernel package uninstallation
- Change OBJECT_FILES_NON_STANDARD_*.o etc. to take a relative path to
Makefile
- Support GCC's -fmin-function-alignment flag
- Fix a null pointer dereference bug in modpost
- Add the DTB support to the RPM package
- Various fixes and cleanups in Kconfig
* tag 'kbuild-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (67 commits)
kconfig: tests: test dependency after shuffling choices
kconfig: tests: add a test for randconfig with dependent choices
kconfig: tests: support KCONFIG_SEED for the randconfig runner
kbuild: rpm-pkg: add dtb files in kernel rpm
kconfig: remove unneeded menu_is_visible() call in conf_write_defconfig()
kconfig: check prompt for choice while parsing
kconfig: lxdialog: remove unused dialog colors
kconfig: lxdialog: fix button color for blackbg theme
modpost: fix null pointer dereference
kbuild: remove GCC's default -Wpacked-bitfield-compat flag
kbuild: unexport abs_srctree and abs_objtree
kbuild: Move -Wenum-{compare-conditional,enum-conversion} into W=1
kconfig: remove named choice support
kconfig: use linked list in get_symbol_str() to iterate over menus
kconfig: link menus to a symbol
kbuild: fix inconsistent indentation in top Makefile
kbuild: Use -fmin-function-alignment when available
alpha: merge two entries for CONFIG_ALPHA_GAMMA
alpha: merge two entries for CONFIG_ALPHA_EV4
kbuild: change DTC_FLAGS_<basetarget>.o to take the path relative to $(obj)
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GCC recently added option -fmin-function-alignment, which should appear
in GCC 14. Unlike -falign-functions, this option causes all functions to
be aligned at the specified value, including the cold ones.
In particular, when an arm64 kernel is built with
DYNAMIC_FTRACE_WITH_CALL_OPS=y, the 8-byte function alignment is
required for correct functionality. This was done by -falign-functions=8
and having workarounds in the kernel to force the compiler to follow
this alignment. The new -fmin-function-alignment option directly
guarantees it.
Detect availability of -fmin-function-alignment and use it instead of
-falign-functions when present. Introduce CC_HAS_SANE_FUNCTION_ALIGNMENT
and enable __cold to work as expected when it is set.
Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the "big" set of driver core and kernfs changes for 6.9-rc1.
Nothing all that crazy here, just some good updates that include:
- automatic attribute group hiding from Dan Williams (he fixed up my
horrible attempt at doing this.)
- kobject lock contention fixes from Eric Dumazet
- driver core cleanups from Andy
- kernfs rcu work from Tejun
- fw_devlink changes to resolve some reported issues
- other minor changes, all details in the shortlog
All of these have been in linux-next for a long time with no reported
issues"
* tag 'driver-core-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (28 commits)
device: core: Log warning for devices pending deferred probe on timeout
driver: core: Use dev_* instead of pr_* so device metadata is added
driver: core: Log probe failure as error and with device metadata
of: property: fw_devlink: Add support for "post-init-providers" property
driver core: Add FWLINK_FLAG_IGNORE to completely ignore a fwnode link
driver core: Adds flags param to fwnode_link_add()
debugfs: fix wait/cancellation handling during remove
device property: Don't use "proxy" headers
device property: Move enum dev_dma_attr to fwnode.h
driver core: Move fw_devlink stuff to where it belongs
driver core: Drop unneeded 'extern' keyword in fwnode.h
firmware_loader: Suppress warning on FW_OPT_NO_WARN flag
sysfs:Addresses documentation in sysfs_merge_group and sysfs_unmerge_group.
firmware_loader: introduce __free() cleanup hanler
platform-msi: Remove usage of the deprecated ida_simple_xx() API
sysfs: Introduce DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE()
sysfs: Document new "group visible" helpers
sysfs: Fix crash on empty group attributes array
sysfs: Introduce a mechanism to hide static attribute_groups
sysfs: Introduce a mechanism to hide static attribute_groups
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A fwnode link between specific supplier-consumer fwnodes can be added
multiple times for multiple reasons. If that dependency doesn't exist,
deleting the fwnode link once doesn't guarantee that it won't get created
again.
So, add FWLINK_FLAG_IGNORE flag to mark a fwnode link as one that needs to
be completely ignored. Since a fwnode link's flags is an OR of all the
flags passed to all the fwnode_link_add() calls to create that specific
fwnode link, the FWLINK_FLAG_IGNORE flag is preserved and can be used to
mark a fwnode link as on that need to be completely ignored until it is
deleted.
Signed-off-by: Saravana Kannan <saravanak@google.com>
Acked-by: "Rafael J. Wysocki" <rafael@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240305050458.1400667-3-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Allow the callers to set fwnode link flags when adding fwnode links.
Signed-off-by: Saravana Kannan <saravanak@google.com>
Acked-by: "Rafael J. Wysocki" <rafael@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240305050458.1400667-2-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Update header inclusions to follow IWYU (Include What You Use)
principle.
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240301180138.271590-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The struct fwnode_operations defines one of the callback to return
enum dev_dma_attr. But this currently is defined in property.h.
Move it to the correct location.
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240301180138.271590-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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A few APIs, i.e. fwnode_is_ancestor_of(), fwnode_get_next_parent_dev(),
and get_dev_from_fwnode(), that belong specifically to the fw_devlink APIs,
may be static, but they are not.
Resolve this mess by moving them to the driver/base/core where the all
users are being resided and make static.
No functional changes intended.
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240301180138.271590-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We do not use 'extern' keyword with functions. Remove the last one
mistakenly added to fwnode.h.
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Saravana Kannan <saravanak@google.com>
Acked-by: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240301180138.271590-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Define cleanup handler using facilities from linux/cleanup.h to simplify
error handling in code using firmware loader. This will allow writing code
like this:
int driver_update_firmware(...)
{
const struct firmware *fw_entry __free(firmware) = NULL;
int error;
...
error = request_firmware(&fw_entry, fw_name, dev);
if (error) {
dev_err(dev, "failed to request firmware %s: %d",
fw_name, error);
return error;
}
error = check_firmware_valid(fw_entry);
if (error)
return error;
guard(mutex)(&instance->lock);
error = use_firmware(instance, fw);
if (error)
return error;
return 0;
}
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Luis Chamberalin <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/ZaeQw7VXhnirX4pQ@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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One of the first users of DEFINE_SYSFS_GROUP_VISIBLE() did this:
static umode_t dp0_attr_visible(struct kobject *kobj,
struct attribute *attr,
int n)
{
struct sdw_slave *slave = dev_to_sdw_dev(kobj_to_dev(kobj));
if (slave->prop.dp0_prop)
return attr->mode;
return 0;
}
static bool dp0_group_visible(struct kobject *kobj)
{
struct sdw_slave *slave = dev_to_sdw_dev(kobj_to_dev(kobj));
if (slave->prop.dp0_prop)
return true;
return false;
}
DEFINE_SYSFS_GROUP_VISIBLE(dp0);
...i.e. the _group_visible() helper is identical to the _attr_visible()
helper. Use the "simple" helper to reduce that to:
static bool dp0_group_visible(struct kobject *kobj)
{
struct sdw_slave *slave = dev_to_sdw_dev(kobj_to_dev(kobj));
if (slave->prop.dp0_prop)
return true;
return false;
}
DEFINE_SIMPLE_SYSFS_GROUP_VISIBLE(dp0);
Remove the need to specify per attribute visibility if the goal is to
hide the entire group.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/170863446625.1479840.10593839479268727913.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add documentation and examples for how to use
DEFINE_SYSFS_GROUP_VISIBLE() and SYSFS_GROUP_VISIBLE(). Recall that the
motivation for this work is that it is easier to reason about the
lifetime of statically defined sysfs attributes that become visible at
device_add() time rather than dynamically adding them later.
DEFINE_SYSFS_GROUP_VISIBLE() tackles one of the reasons to opt for
dynamically created attributes which did not have a facility for hiding
empty directories.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/170863446065.1479840.10697164014098377292.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add a mechanism for named attribute_groups to hide their directory at
sysfs_update_group() time, or otherwise skip emitting the group
directory when the group is first registered. It piggybacks on
is_visible() in a similar manner as SYSFS_PREALLOC, i.e. special flags
in the upper bits of the returned mode. To use it, specify a symbol
prefix to DEFINE_SYSFS_GROUP_VISIBLE(), and then pass that same prefix
to SYSFS_GROUP_VISIBLE() when assigning the @is_visible() callback:
DEFINE_SYSFS_GROUP_VISIBLE($prefix)
struct attribute_group $prefix_group = {
.name = $name,
.is_visible = SYSFS_GROUP_VISIBLE($prefix),
};
SYSFS_GROUP_VISIBLE() expects a definition of $prefix_group_visible()
and $prefix_attr_visible(), where $prefix_group_visible() just returns
true / false and $prefix_attr_visible() behaves as normal.
The motivation for this capability is to centralize PCI device
authentication in the PCI core with a named sysfs group while keeping
that group hidden for devices and platforms that do not meet the
requirements. In a PCI topology, most devices will not support
authentication, a small subset will support just PCI CMA (Component
Measurement and Authentication), a smaller subset will support PCI CMA +
PCIe IDE (Link Integrity and Encryption), and only next generation
server hosts will start to include a platform TSM (TEE Security
Manager).
Without this capability the alternatives are:
* Check if all attributes are invisible and if so, hide the directory.
Beyond trouble getting this to work [1], this is an ABI change for
scenarios if userspace happens to depend on group visibility absent any
attributes. I.e. this new capability avoids regression since it does
not retroactively apply to existing cases.
* Publish an empty /sys/bus/pci/devices/$pdev/tsm/ directory for all PCI
devices (i.e. for the case when TSM platform support is present, but
device support is absent). Unfortunate that this will be a vestigial
empty directory in the vast majority of cases.
* Reintroduce usage of runtime calls to sysfs_{create,remove}_group()
in the PCI core. Bjorn has already indicated that he does not want to
see any growth of pci_sysfs_init() [2].
* Drop the named group and simulate a directory by prefixing all
TSM-related attributes with "tsm_". Unfortunate to not use the naming
capability of a sysfs group as intended.
In comparison, there is a small potential for regression if for some
reason an @is_visible() callback had dependencies on how many times it
was called. Additionally, it is no longer an error to update a group
that does not have its directory already present, and it is no longer a
WARN() to remove a group that was never visible.
Link: https://lore.kernel.org/all/2024012321-envious-procedure-4a58@gregkh/ [1]
Link: https://lore.kernel.org/linux-pci/20231019200110.GA1410324@bhelgaas/ [2]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/2024013028-deflator-flaring-ec62@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We need the driver core changes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We will soon no longer acquire uevent_sock_mutex
for most kobject_uevent_net_broadcast() calls,
and also while calling uevent_net_broadcast().
Make uevent_seqnum an atomic64_t to get its own protection.
This fixes a race while reading /sys/kernel/uevent_seqnum.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Christian Brauner <brauner@kernel.org>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20240214084829.684541-2-edumazet@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Now that the driver core can properly handle constant struct bus_type,
move the cpu_subsys variable to be a constant structure as well, placing
it into read-only memory which can not be modified at runtime.
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/2024010548-crane-snooze-a871@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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kernfs_find_and_get_node_by_id()
The BPF helper bpf_cgroup_from_id() calls kernfs_find_and_get_node_by_id()
which acquires kernfs_idr_lock, which is an non-raw non-IRQ-safe lock. This
can lead to deadlocks as bpf_cgroup_from_id() can be called from any BPF
programs including e.g. the ones that attach to functions which are holding
the scheduler rq lock.
Consider the following BPF program:
SEC("fentry/__set_cpus_allowed_ptr_locked")
int BPF_PROG(__set_cpus_allowed_ptr_locked, struct task_struct *p,
struct affinity_context *affn_ctx, struct rq *rq, struct rq_flags *rf)
{
struct cgroup *cgrp = bpf_cgroup_from_id(p->cgroups->dfl_cgrp->kn->id);
if (cgrp) {
bpf_printk("%d[%s] in %s", p->pid, p->comm, cgrp->kn->name);
bpf_cgroup_release(cgrp);
}
return 0;
}
__set_cpus_allowed_ptr_locked() is called with rq lock held and the above
BPF program calls bpf_cgroup_from_id() within leading to the following
lockdep warning:
=====================================================
WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected
6.7.0-rc3-work-00053-g07124366a1d7-dirty #147 Not tainted
-----------------------------------------------------
repro/1620 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffffffff833b3688 (kernfs_idr_lock){+.+.}-{2:2}, at: kernfs_find_and_get_node_by_id+0x1e/0x70
and this task is already holding:
ffff888237ced698 (&rq->__lock){-.-.}-{2:2}, at: task_rq_lock+0x4e/0xf0
which would create a new lock dependency:
(&rq->__lock){-.-.}-{2:2} -> (kernfs_idr_lock){+.+.}-{2:2}
...
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(kernfs_idr_lock);
local_irq_disable();
lock(&rq->__lock);
lock(kernfs_idr_lock);
<Interrupt>
lock(&rq->__lock);
*** DEADLOCK ***
...
Call Trace:
dump_stack_lvl+0x55/0x70
dump_stack+0x10/0x20
__lock_acquire+0x781/0x2a40
lock_acquire+0xbf/0x1f0
_raw_spin_lock+0x2f/0x40
kernfs_find_and_get_node_by_id+0x1e/0x70
cgroup_get_from_id+0x21/0x240
bpf_cgroup_from_id+0xe/0x20
bpf_prog_98652316e9337a5a___set_cpus_allowed_ptr_locked+0x96/0x11a
bpf_trampoline_6442545632+0x4f/0x1000
__set_cpus_allowed_ptr_locked+0x5/0x5a0
sched_setaffinity+0x1b3/0x290
__x64_sys_sched_setaffinity+0x4f/0x60
do_syscall_64+0x40/0xe0
entry_SYSCALL_64_after_hwframe+0x46/0x4e
Let's fix it by protecting kernfs_node and kernfs_root with RCU and making
kernfs_find_and_get_node_by_id() acquire rcu_read_lock() instead of
kernfs_idr_lock.
This adds an rcu_head to kernfs_node making it larger by 16 bytes on 64bit.
Combined with the preceding rearrange patch, the net increase is 8 bytes.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Andrea Righi <andrea.righi@canonical.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20240109214828.252092-4-tj@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Moving .flags and .mode right below .hash makes kernfs_node smaller by 8
bytes on 64bit. To avoid creating a hole from 8 bytes alignment on 32bit
archs, .priv is moved below so that there are two 32bit pointers after the
64bit .id field.
v2: Updated to avoid size increase on 32bit noticed by Geert.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/ZZ7hwA18nfmFjYpj@slm.duckdns.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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