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1313968 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
8a7fa81137 |
Random number generator updates for Linux 6.13-rc1.
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Linus Torvalds
|
02b2f1a7b8 |
This update includes the following changes:
API:
- Add sig driver API.
- Remove signing/verification from akcipher API.
- Move crypto_simd_disabled_for_test to lib/crypto.
- Add WARN_ON for return values from driver that indicates memory corruption.
Algorithms:
- Provide crc32-arch and crc32c-arch through Crypto API.
- Optimise crc32c code size on x86.
- Optimise crct10dif on arm/arm64.
- Optimise p10-aes-gcm on powerpc.
- Optimise aegis128 on x86.
- Output full sample from test interface in jitter RNG.
- Retry without padata when it fails in pcrypt.
Drivers:
- Add support for Airoha EN7581 TRNG.
- Add support for STM32MP25x platforms in stm32.
- Enable iproc-r200 RNG driver on BCMBCA.
- Add Broadcom BCM74110 RNG driver.
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Merge tag 'v6.13-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"API:
- Add sig driver API
- Remove signing/verification from akcipher API
- Move crypto_simd_disabled_for_test to lib/crypto
- Add WARN_ON for return values from driver that indicates memory
corruption
Algorithms:
- Provide crc32-arch and crc32c-arch through Crypto API
- Optimise crc32c code size on x86
- Optimise crct10dif on arm/arm64
- Optimise p10-aes-gcm on powerpc
- Optimise aegis128 on x86
- Output full sample from test interface in jitter RNG
- Retry without padata when it fails in pcrypt
Drivers:
- Add support for Airoha EN7581 TRNG
- Add support for STM32MP25x platforms in stm32
- Enable iproc-r200 RNG driver on BCMBCA
- Add Broadcom BCM74110 RNG driver"
* tag 'v6.13-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (112 commits)
crypto: marvell/cesa - fix uninit value for struct mv_cesa_op_ctx
crypto: cavium - Fix an error handling path in cpt_ucode_load_fw()
crypto: aesni - Move back to module_init
crypto: lib/mpi - Export mpi_set_bit
crypto: aes-gcm-p10 - Use the correct bit to test for P10
hwrng: amd - remove reference to removed PPC_MAPLE config
crypto: arm/crct10dif - Implement plain NEON variant
crypto: arm/crct10dif - Macroify PMULL asm code
crypto: arm/crct10dif - Use existing mov_l macro instead of __adrl
crypto: arm64/crct10dif - Remove remaining 64x64 PMULL fallback code
crypto: arm64/crct10dif - Use faster 16x64 bit polynomial multiply
crypto: arm64/crct10dif - Remove obsolete chunking logic
crypto: bcm - add error check in the ahash_hmac_init function
crypto: caam - add error check to caam_rsa_set_priv_key_form
hwrng: bcm74110 - Add Broadcom BCM74110 RNG driver
dt-bindings: rng: add binding for BCM74110 RNG
padata: Clean up in padata_do_multithreaded()
crypto: inside-secure - Fix the return value of safexcel_xcbcmac_cra_init()
crypto: qat - Fix missing destroy_workqueue in adf_init_aer()
crypto: rsassa-pkcs1 - Reinstate support for legacy protocols
...
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Linus Torvalds
|
1af29b34ea |
chrome platform firmware changes for 6.13
* Fixes
- Do not double register "simple-framebuffer" platform device if
Generic System Framebuffers (sysfb) already did that.
- Fix a missing of unregistering platform driver in error handling
path.
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Merge tag 'chrome-platform-firmware-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux
Pull chrome platform firmware updates from Tzung-Bi Shih:
- Do not double register "simple-framebuffer" platform device if
Generic System Framebuffers (sysfb) already did that
- Fix a missing of unregistering platform driver in error handling path
* tag 'chrome-platform-firmware-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
firmware: google: Unregister driver_info on failure
firmware: coreboot: Don't register a pdev if screen_info data is present
firmware: sysfb: Add a sysfb_handles_screen_info() helper function
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Linus Torvalds
|
78516f4aef |
chrome platform changes for 6.13
* Fixes
- Fix a leak of fwnode refcount.
* Cleanups
- Drop unused I2C driver data.
- Move back from platform_driver::remove_new() to
platform_driver::remove().
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Merge tag 'chrome-platform-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux
Pull chrome platform updates from Tzung-Bi Shih:
"Fixes:
- Fix a leak of fwnode refcount.
Cleanups:
- Drop unused I2C driver data
- Move back from platform_driver::remove_new() to
platform_driver::remove()"
* tag 'chrome-platform-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
platform/chrome: Switch back to struct platform_driver::remove()
platform/chrome: cros_ec_typec: fix missing fwnode reference decrement
platform/chrome: Drop explicit initialization of struct i2c_device_id::driver_data to 0
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Linus Torvalds
|
311e062ad5 |
CSD-lock diagnostic updates for v6.13
This commit switches from sched_clock() to ktime_get_mono_fast_ns(), which on x86 switches from the rdtsc instruction to the rdtscp instruction, thus avoiding instruction reorderings that cause false-positive reports of CSD-lock stalls of almost 2^46 nanoseconds. These false positives are rare, but really are seen in the wild. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEbK7UrM+RBIrCoViJnr8S83LZ+4wFAmc5XvETHHBhdWxtY2tA a2VybmVsLm9yZwAKCRCevxLzctn7jNUCD/9NqeuxsVcumybbjlHs/IbJt47qTPVk 1O+mpLiKfscw/ndfvqJe1RU+IOUJUPBPzBPUWvZQZ2SzeU03oOI4/szFttDdXSi3 0uI9qOJn3auk2+cdU7CxXOLSiWYEWlMjWvN6d34QeLh7smLkendxH2wo2fkL9kf0 DzvosOrlyNWGZPUQrb1TRW7RKGE7vap8x7tK/p1qMO2xmaPeIX7dfiY38CJC5fjj +n8i1aZIxLFc65I0/Z+nGTMFrktzbYjJik6k++QZzHx+GiXaCkgfidZFspj3uPXW CPa6KxheCrdmFV4A/TVnKYJyutoGeheMjwlVfz0YOSe8J5/N3F9RfDFBYedt2fL+ 11gRpOg5hz61AsyxZ1+iViW0guXoVzn2uwQ5rkou9184fBXPuwH1MAwBcsKYwQig Frd0ZzyrqGHCHwDWtBfAb+qC17b5krsa+fKkjiPFDRDRB5N2hh67tcquOE3wzvrG oAHEZgeFwxZQYGIZ7uITebyThe9NvkBRyrJLvxUEpvF2MoI0yJaqoAwkHieSl1vD KJJ+o+HxVa3D/WCWxTNCjDyxvCMJpFHFWB3h8+hi+X2UleRGrDiIDmIdddMM1/gr meYjZ/c1/t7Y14zwzp/SxUHFJ4U8U2jI23/K5ldJVH34k6XwccU06NYWjHYokXgT ZRMCJ8sAcTtlhw== =8GQJ -----END PGP SIGNATURE----- Merge tag 'csd-lock.2024.11.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu Pull CSD-lock update from Paul McKenney: "This switches from sched_clock() to ktime_get_mono_fast_ns(), which on x86 switches from the rdtsc instruction to the rdtscp instruction, thus avoiding instruction reorderings that cause false-positive reports of CSD-lock stalls of almost 2^46 nanoseconds. These false positives are rare, but really are seen in the wild" * tag 'csd-lock.2024.11.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: locking/csd-lock: Switch from sched_clock() to ktime_get_mono_fast_ns() |
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Linus Torvalds
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d7d4102f0a |
scftorture changes for v6.13
o Avoid divide operation. o Fix cleanup code waiting for IPI handlers. o Move memory allocations out of preempt-disable region of code for PREEMPT_RT compatibility. o Use a lockless list to avoid freeing memory while interrupts are disabled, again for PREEMPT_RT compatibility. o Make lockless list scf_add_to_free_list() correctly handle freeing a NULL pointer. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEbK7UrM+RBIrCoViJnr8S83LZ+4wFAmc5X0gTHHBhdWxtY2tA a2VybmVsLm9yZwAKCRCevxLzctn7jDVMEACQRdJ0NYxygGFpUzDj2Er2wdOtBG0E n1NOqmNX7nlBL8BzseCFa2OiVbvggE7+ynAGcqISzDLZGE6aa4/HwKLkxSGB62UV WMXNiJE+t4bb1TsdMwLcQnOmmDniy6ID0NIEA8YHEEZltuDNQGQfjB8ynJewwNmY yMU90JDwVvDVmM9+AXUqYYRAar1gR5k7jknQbnXqb+6xT/kMEu+B1z5BGiMB3Z5L LylobI+3OZTY417tgJU/iSeRZbLZn7Xs6pxOcJMpeFvvYMn4mkYaUX+WUOU9oTQd h91wGxRouTQpS41zGNI5HcqnTtevrnmtXNROyUkei1aipvnq8N9HR11UJDXWgSV4 24dH8qZVzTv+/cWIuNA3uUH+hu7kFZztQQQeIJdenm3CBtEYIK4ssrlyXUM7U5AY JQOjeEzApQLht++VTjGSS3CZhODLCTQU+IeQH1ChM1EZz2M9gsv9RqKfXrnFTDnO 6UrLNa2YCpvQCEeNj2i8TaFHZAInGTcNFHjhxd+kA4SsCDygi9PYxKq6xVadLVZs Kwj6kpgPpatQzZ5w7Il9RF+qTgpOnbqB52JFt3rGjQg8uALfDo5S85wurhvu6+GC Qy7XvDWhmUn8fZwvlRO+DABBWOYmXeAVHKxWA3VBxO3O454Pxx5IuVSW4213GFVz 58sAl0WwK8Jscg== =ElHE -----END PGP SIGNATURE----- Merge tag 'scftorture.2024.11.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu Pull scftorture updates from Paul McKenney: - Avoid divide operation - Fix cleanup code waiting for IPI handlers - Move memory allocations out of preempt-disable region of code for PREEMPT_RT compatibility - Use a lockless list to avoid freeing memory while interrupts are disabled, again for PREEMPT_RT compatibility - Make lockless list scf_add_to_free_list() correctly handle freeing a NULL pointer * tag 'scftorture.2024.11.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: scftorture: Handle NULL argument passed to scf_add_to_free_list(). scftorture: Use a lock-less list to free memory. scftorture: Move memory allocation outside of preempt_disable region. scftorture: Wait until scf_cleanup_handler() completes. scftorture: Avoid additional div operation. |
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Linus Torvalds
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26c9fdd6f3 |
nolibc changes for 6.13
Changes ------- * Fix potential error due to missing #include on s390 * Compatibility with -Wmissing-fallthrough * Run qemu with more memory during tests -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEbK7UrM+RBIrCoViJnr8S83LZ+4wFAmclJJ4THHBhdWxtY2tA a2VybmVsLm9yZwAKCRCevxLzctn7jDIIEACCBELCRNPpE5RMF/8DDsQ7wiMlQEWS ZLD3ut57m2FBJf1AUTbMMxweNXS5TY/4AZu3tsR0/olFh483GIchvcz5z5kVcetO 4miwhmfsvy4F7XmVoZGFN2nPo8ign+hW4aMVmpC3xzSi5bxGmulcVmmBwV21pVJx 8+xkyXUGAI1/qcuBM56ZxF1b83SkpPBALW5yLK11iHb1CqophoqDx7MpGGExEH4h C2ca4ygXHgstVgmzJF8z4k5M65Ky6mpsi1zO26ixsqurYbNzkrSUjkTSk85Zq+Ee aqvao1sURJ1C+h70gvqmDelErVe4ralhKePneK3LkEbxkWBR7VUMk6kOOq5UhIhr H0rvicVFFvnIrovzsoaEUQLvD5VCdwBdbzK4gb+12PI5D3VQ8VP4nYL/bey8AXNw O+zfvkgZ4IDwffM8RpC4P1lCYC1AyyQ7srwe+juDuPMAfVPYEXZ/cUeFDboDpBHn UIONBpdFqep1/xlGVc9tLm2F+01Z0gbyG52ccFwGK1Q0L2+0q7V9wIh+7qBAi+Jb fiVbz1I/8Z9TCpjDpmUPScZXxEZW4LeCfXH0pjEb6KbDI9fXkCorzOVHes8y+tNl CO28vSZLnDXo89uQshQwr+pj776djkr9d+s2r1WCngIGoivd24evkHyZZ87J88p5 pik3/mLDC9FNfw== =aNvL -----END PGP SIGNATURE----- Merge tag 'nolibc.2024.11.01a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu Pull nolibc updates from Paul McKenney: - Fix potential error due to missing #include on s390 - Compatibility with -Wmissing-fallthrough - Run qemu with more memory during tests * tag 'nolibc.2024.11.01a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: selftests/nolibc: start qemu with 1 GiB of memory tools/nolibc: compiler: add macro __nolibc_fallthrough tools/nolibc: s390: include std.h |
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Linus Torvalds
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158f238aa6 |
xen: branch for v6.13-rc1
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCZzd0YQAKCRCAXGG7T9hj vm1JAQDBZKpEkPFrxy969YFNCSUiUj42+rDRI3OJt8y0CGTS2AEA53+B+/DYDm8i syw5eaSJv4uohary659ywZUdSljPig4= =MHOT -----END PGP SIGNATURE----- Merge tag 'for-linus-6.13-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen updates from Juergen Gross: - a series for booting as a PVH guest, doing some cleanups after the previous work to make PVH boot code position independent - a fix of the xenbus driver avoiding a leak in an error case * tag 'for-linus-6.13-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: Fix the issue of resource not being properly released in xenbus_dev_probe() x86/pvh: Avoid absolute symbol references in .head.text x86/xen: Avoid relocatable quantities in Xen ELF notes x86/pvh: Omit needless clearing of phys_base x86/pvh: Use correct size value in GDT descriptor x86/pvh: Call C code via the kernel virtual mapping |
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Linus Torvalds
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ba1f9c8fe3 |
arm64 updates for 6.13:
* Support for running Linux in a protected VM under the Arm Confidential
Compute Architecture (CCA)
* Guarded Control Stack user-space support. Current patches follow the
x86 ABI of implicitly creating a shadow stack on clone(). Subsequent
patches (already on the list) will add support for clone3() allowing
finer-grained control of the shadow stack size and placement from libc
* AT_HWCAP3 support (not running out of HWCAP2 bits yet but we are
getting close with the upcoming dpISA support)
* Other arch features:
- In-kernel use of the memcpy instructions, FEAT_MOPS (previously only
exposed to user; uaccess support not merged yet)
- MTE: hugetlbfs support and the corresponding kselftests
- Optimise CRC32 using the PMULL instructions
- Support for FEAT_HAFT enabling ARCH_HAS_NONLEAF_PMD_YOUNG
- Optimise the kernel TLB flushing to use the range operations
- POE/pkey (permission overlays): further cleanups after bringing the
signal handler in line with the x86 behaviour for 6.12
* arm64 perf updates:
- Support for the NXP i.MX91 PMU in the existing IMX driver
- Support for Ampere SoCs in the Designware PCIe PMU driver
- Support for Marvell's 'PEM' PCIe PMU present in the 'Odyssey' SoC
- Support for Samsung's 'Mongoose' CPU PMU
- Support for PMUv3.9 finer-grained userspace counter access control
- Switch back to platform_driver::remove() now that it returns 'void'
- Add some missing events for the CXL PMU driver
* Miscellaneous arm64 fixes/cleanups:
- Page table accessors cleanup: type updates, drop unused macros,
reorganise arch_make_huge_pte() and clean up pte_mkcont(), sanity
check addresses before runtime P4D/PUD folding
- Command line override for ID_AA64MMFR0_EL1.ECV (advertising the
FEAT_ECV for the generic timers) allowing Linux to boot with
firmware deployments that don't set SCTLR_EL3.ECVEn
- ACPI/arm64: tighten the check for the array of platform timer
structures and adjust the error handling procedure in
gtdt_parse_timer_block()
- Optimise the cache flush for the uprobes xol slot (skip if no
change) and other uprobes/kprobes cleanups
- Fix the context switching of tpidrro_el0 when kpti is enabled
- Dynamic shadow call stack fixes
- Sysreg updates
- Various arm64 kselftest improvements
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Catalin Marinas:
- Support for running Linux in a protected VM under the Arm
Confidential Compute Architecture (CCA)
- Guarded Control Stack user-space support. Current patches follow the
x86 ABI of implicitly creating a shadow stack on clone(). Subsequent
patches (already on the list) will add support for clone3() allowing
finer-grained control of the shadow stack size and placement from
libc
- AT_HWCAP3 support (not running out of HWCAP2 bits yet but we are
getting close with the upcoming dpISA support)
- Other arch features:
- In-kernel use of the memcpy instructions, FEAT_MOPS (previously
only exposed to user; uaccess support not merged yet)
- MTE: hugetlbfs support and the corresponding kselftests
- Optimise CRC32 using the PMULL instructions
- Support for FEAT_HAFT enabling ARCH_HAS_NONLEAF_PMD_YOUNG
- Optimise the kernel TLB flushing to use the range operations
- POE/pkey (permission overlays): further cleanups after bringing
the signal handler in line with the x86 behaviour for 6.12
- arm64 perf updates:
- Support for the NXP i.MX91 PMU in the existing IMX driver
- Support for Ampere SoCs in the Designware PCIe PMU driver
- Support for Marvell's 'PEM' PCIe PMU present in the 'Odyssey' SoC
- Support for Samsung's 'Mongoose' CPU PMU
- Support for PMUv3.9 finer-grained userspace counter access
control
- Switch back to platform_driver::remove() now that it returns
'void'
- Add some missing events for the CXL PMU driver
- Miscellaneous arm64 fixes/cleanups:
- Page table accessors cleanup: type updates, drop unused macros,
reorganise arch_make_huge_pte() and clean up pte_mkcont(), sanity
check addresses before runtime P4D/PUD folding
- Command line override for ID_AA64MMFR0_EL1.ECV (advertising the
FEAT_ECV for the generic timers) allowing Linux to boot with
firmware deployments that don't set SCTLR_EL3.ECVEn
- ACPI/arm64: tighten the check for the array of platform timer
structures and adjust the error handling procedure in
gtdt_parse_timer_block()
- Optimise the cache flush for the uprobes xol slot (skip if no
change) and other uprobes/kprobes cleanups
- Fix the context switching of tpidrro_el0 when kpti is enabled
- Dynamic shadow call stack fixes
- Sysreg updates
- Various arm64 kselftest improvements
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (168 commits)
arm64: tls: Fix context-switching of tpidrro_el0 when kpti is enabled
kselftest/arm64: Try harder to generate different keys during PAC tests
kselftest/arm64: Don't leak pipe fds in pac.exec_sign_all()
arm64/ptrace: Clarify documentation of VL configuration via ptrace
kselftest/arm64: Corrupt P0 in the irritator when testing SSVE
acpi/arm64: remove unnecessary cast
arm64/mm: Change protval as 'pteval_t' in map_range()
kselftest/arm64: Fix missing printf() argument in gcs/gcs-stress.c
kselftest/arm64: Add FPMR coverage to fp-ptrace
kselftest/arm64: Expand the set of ZA writes fp-ptrace does
kselftets/arm64: Use flag bits for features in fp-ptrace assembler code
kselftest/arm64: Enable build of PAC tests with LLVM=1
kselftest/arm64: Check that SVCR is 0 in signal handlers
selftests/mm: Fix unused function warning for aarch64_write_signal_pkey()
kselftest/arm64: Fix printf() compiler warnings in the arm64 syscall-abi.c tests
kselftest/arm64: Fix printf() warning in the arm64 MTE prctl() test
kselftest/arm64: Fix printf() compiler warnings in the arm64 fp tests
kselftest/arm64: Fix build with stricter assemblers
arm64/scs: Drop unused prototype __pi_scs_patch_vmlinux()
arm64/scs: Deal with 64-bit relative offsets in FDE frames
...
|
||
|
Linus Torvalds
|
9aa4c37f71 |
m68k updates for v6.13
- Revive SCSI and early console support on MVME147,
- Fix early kernel parameters using static keys,
- Prevent and improve handling of kernel configurations that lack
specific platform, CPU, or MMU support, to avoid build failures,
- Miscellaneous fixes and improvements,
- Defconfig updates.
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Merge tag 'm68k-for-v6.13-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k updates from Geert Uytterhoeven:
- Revive SCSI and early console support on MVME147
- Fix early kernel parameters using static keys
- Prevent and improve handling of kernel configurations that lack
specific platform, CPU, or MMU support, to avoid build failures
- Miscellaneous fixes and improvements
- Defconfig updates
* tag 'm68k-for-v6.13-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k: defconfig: Update defconfigs for v6.12-rc1
m68k: mvme147: Reinstate early console
m68k: Make sure NR_IRQS is never zero
m68k: Select M68020 as fallback for classic
m68k: Move Sun 3 into a top-level platform option
m68k: kernel: Use str_read_write() helper function
m68k: Initialize jump labels early during setup_arch()
m68k: mvme147: Fix SCSI controller IRQ numbers
m68k: mvme147: Make mvme147_sched_init() __init
|
||
|
Linus Torvalds
|
ae4336e20b |
just cleanups and fixes
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||
|
Linus Torvalds
|
0338cd9c22 |
s390 updates for 6.13 merge window
- Add firmware sysfs interface which allows user space to retrieve the dump
area size of the machine
- Add 'measurement_chars_full' CHPID sysfs attribute to make the complete
associated Channel-Measurements Characteristics Block available
- Add virtio-mem support
- Move gmap aka KVM page fault handling from the main fault handler to KVM
code. This is the first step to make s390 KVM page fault handling similar
to other architectures. With this first step the main fault handler does
not have any special handling anymore, and therefore convert it to
support LOCK_MM_AND_FIND_VMA
- With gcc 14 s390 support for flag output operand support for inline
assemblies was added. This allows for several optimizations
- Provide a cmpxchg inline assembly which makes use of this, and provide
all variants of arch_try_cmpxchg() so that the compiler can generate
slightly better code
- Convert a few cmpxchg() loops to try_cmpxchg() loops
- Similar to x86 add a CC_OUT() helper macro (and other macros), and
convert all inline assemblies to make use of them, so that depending on
compiler version better code can be generated
- List installed host-key hashes in sysfs if the machine supports the Query
Ultravisor Keys UVC
- Add 'Retrieve Secret' ioctl which allows user space in protected
execution guests to retrieve previously stored secrets from the
Ultravisor
- Add pkey-uv module which supports the conversion of Ultravisor
retrievable secrets to protected keys
- Extend the existing paes cipher to exploit the full AES-XTS hardware
acceleration introduced with message-security assist extension 10
- Convert hopefully all sysfs show functions to use sysfs_emit() so that
the constant flow of such patches stop
- For PCI devices make use of the newly added Topology ID attribute to
enable whole card multi-function support despite the change to PCHID per
port. Additionally improve the overall robustness and usability of
the multifunction support
- Various other small improvements, fixes, and cleanups
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Merge tag 's390-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens:
- Add firmware sysfs interface which allows user space to retrieve the
dump area size of the machine
- Add 'measurement_chars_full' CHPID sysfs attribute to make the
complete associated Channel-Measurements Characteristics Block
available
- Add virtio-mem support
- Move gmap aka KVM page fault handling from the main fault handler to
KVM code. This is the first step to make s390 KVM page fault handling
similar to other architectures. With this first step the main fault
handler does not have any special handling anymore, and therefore
convert it to support LOCK_MM_AND_FIND_VMA
- With gcc 14 s390 support for flag output operand support for inline
assemblies was added. This allows for several optimizations:
- Provide a cmpxchg inline assembly which makes use of this, and
provide all variants of arch_try_cmpxchg() so that the compiler
can generate slightly better code
- Convert a few cmpxchg() loops to try_cmpxchg() loops
- Similar to x86 add a CC_OUT() helper macro (and other macros),
and convert all inline assemblies to make use of them, so that
depending on compiler version better code can be generated
- List installed host-key hashes in sysfs if the machine supports the
Query Ultravisor Keys UVC
- Add 'Retrieve Secret' ioctl which allows user space in protected
execution guests to retrieve previously stored secrets from the
Ultravisor
- Add pkey-uv module which supports the conversion of Ultravisor
retrievable secrets to protected keys
- Extend the existing paes cipher to exploit the full AES-XTS hardware
acceleration introduced with message-security assist extension 10
- Convert hopefully all sysfs show functions to use sysfs_emit() so
that the constant flow of such patches stop
- For PCI devices make use of the newly added Topology ID attribute to
enable whole card multi-function support despite the change to PCHID
per port. Additionally improve the overall robustness and usability
of the multifunction support
- Various other small improvements, fixes, and cleanups
* tag 's390-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (133 commits)
s390/cio/ioasm: Convert to use flag output macros
s390/cio/qdio: Convert to use flag output macros
s390/sclp: Convert to use flag output macros
s390/dasd: Convert to use flag output macros
s390/boot/physmem: Convert to use flag output macros
s390/pci: Convert to use flag output macros
s390/kvm: Convert to use flag output macros
s390/extmem: Convert to use flag output macros
s390/string: Convert to use flag output macros
s390/diag: Convert to use flag output macros
s390/irq: Convert to use flag output macros
s390/smp: Convert to use flag output macros
s390/uv: Convert to use flag output macros
s390/pai: Convert to use flag output macros
s390/mm: Convert to use flag output macros
s390/cpu_mf: Convert to use flag output macros
s390/cpcmd: Convert to use flag output macros
s390/topology: Convert to use flag output macros
s390/time: Convert to use flag output macros
s390/pageattr: Convert to use flag output macros
...
|
||
|
Linus Torvalds
|
5591fd5e03 |
lsm/stable-6.13 PR 20241112
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||
|
Linus Torvalds
|
8ffc7dbce2 |
selinux/stable-6.13 PR 20241112
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||
|
Linus Torvalds
|
a8220b0ca7 |
audit/stable-6.13 PR 20241112
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||
|
Linus Torvalds
|
8350142a4b |
for-6.13/io_uring-20241118
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmc7S3kQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpjHVEAC+CITBEcGy+S0IK0BpIAhuA+A621LtqBwy 0z/4MZKXMqvWxcFGQJ9Zr8MvxUnY4KFcssiaR5zk+I9TczNu7mLMuPYD1Gb0Klgz mwuFOylo1CAAC41IABYZZ/0qWbTaW0p8tpaGsTbTNk3tBxuMLB550+APAqC1OE9U bb7rP+FHc5+YGI9/7JNWt7NNTSHvVSO6oxjltCxHr1dRg93Jtr2jaY6letY3epFz TCFyfJlDtK8fPwtYRyG51M4g2Vdp9/4qsfPqvnXwUr9MdWaVh5/TFkyvqDi5sCKM zdK/sjRiimYzvqqKg6bzgYscITUPNk2TG6ZJq5U1L7lrglzVY69c7GIUnNzPrL/y AxQsR5Guxz3bRNYWZ4BKJDH+NNB+cgIFEXDsv72qoUy3HTzA6wOPZYxfjhZhKuG/ DjRwM7NGx5oPiKtpK99IulZttXdmtkH0csuLwKmOzrQskQdTuWyrEtU7UQql7oQ5 Rt3DhMXouzYZMicB8U5Q9gO2I3WN+2VVxXl4sa00LG8KsT6PzLnz4Q2k/1c83S6J rRivRbZAbZ1+BqKvF8T7GgzLCeaLgzbeoxmxj6xr87pf3SYEs2KhQeQ+n/C0HTOt GOcG1+bvh7t2aSvlBPKVCExWI4erwG6wXFhfGKsLW9CmwIMqRNxdePpRWe3Cueyp M3QRJuvTxQ== =bDvp -----END PGP SIGNATURE----- Merge tag 'for-6.13/io_uring-20241118' of git://git.kernel.dk/linux Pull io_uring updates from Jens Axboe: - Cleanups of the eventfd handling code, making it fully private. - Support for sending a sync message to another ring, without having a ring available to send a normal async message. - Get rid of the separate unlocked hash table, unify everything around the single locked one. - Add support for ring resizing. It can be hard to appropriately size the CQ ring upfront, if the application doesn't know how busy it will be. This results in applications sizing rings for the most busy case, which can be wasteful. With ring resizing, they can start small and grow the ring, if needed. - Add support for fixed wait regions, rather than needing to copy the same wait data tons of times for each wait operation. - Rewrite the resource node handling, which before was serialized per ring. This caused issues with particularly fixed files, where one file waiting on IO could hold up putting and freeing of other unrelated files. Now each node is handled separately. New code is much simpler too, and was a net 250 line reduction in code. - Add support for just doing partial buffer clones, rather than always cloning the entire buffer table. - Series adding static NAPI support, where a specific NAPI instance is used rather than having a list of them available that need lookup. - Add support for mapped regions, and also convert the fixed wait support mentioned above to that concept. This avoids doing special mappings for various planned features, and folds the existing registered wait into that too. - Add support for hybrid IO polling, which is a variant of strict IOPOLL but with an initial sleep delay to avoid spinning too early and wasting resources on devices that aren't necessarily in the < 5 usec category wrt latencies. - Various cleanups and little fixes. * tag 'for-6.13/io_uring-20241118' of git://git.kernel.dk/linux: (79 commits) io_uring/region: fix error codes after failed vmap io_uring: restore back registered wait arguments io_uring: add memory region registration io_uring: introduce concept of memory regions io_uring: temporarily disable registered waits io_uring: disable ENTER_EXT_ARG_REG for IOPOLL io_uring: fortify io_pin_pages with a warning switch io_msg_ring() to CLASS(fd) io_uring: fix invalid hybrid polling ctx leaks io_uring/uring_cmd: fix buffer index retrieval io_uring/rsrc: add & apply io_req_assign_buf_node() io_uring/rsrc: remove '->ctx_ptr' of 'struct io_rsrc_node' io_uring/rsrc: pass 'struct io_ring_ctx' reference to rsrc helpers io_uring: avoid normal tw intermediate fallback io_uring/napi: add static napi tracking strategy io_uring/napi: clean up __io_napi_do_busy_loop io_uring/napi: Use lock guards io_uring/napi: improve __io_napi_add io_uring/napi: fix io_napi_entry RCU accesses io_uring/napi: protect concurrent io_napi_entry timeout accesses ... |
||
|
Linus Torvalds
|
77a0cfafa9 |
for-6.13/block-20241118
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Merge tag 'for-6.13/block-20241118' of git://git.kernel.dk/linux
Pull block updates from Jens Axboe:
- NVMe updates via Keith:
- Use uring_cmd helper (Pavel)
- Host Memory Buffer allocation enhancements (Christoph)
- Target persistent reservation support (Guixin)
- Persistent reservation tracing (Guixen)
- NVMe 2.1 specification support (Keith)
- Rotational Meta Support (Matias, Wang, Keith)
- Volatile cache detection enhancment (Guixen)
- MD updates via Song:
- Maintainers update
- raid5 sync IO fix
- Enhance handling of faulty and blocked devices
- raid5-ppl atomic improvement
- md-bitmap fix
- Support for manually defining embedded partition tables
- Zone append fixes and cleanups
- Stop sending the queued requests in the plug list to the driver
->queue_rqs() handle in reverse order.
- Zoned write plug cleanups
- Cleanups disk stats tracking and add support for disk stats for
passthrough IO
- Add preparatory support for file system atomic writes
- Add lockdep support for queue freezing. Already found a bunch of
issues, and some fixes for that are in here. More will be coming.
- Fix race between queue stopping/quiescing and IO queueing
- ublk recovery improvements
- Fix ublk mmap for 64k pages
- Various fixes and cleanups
* tag 'for-6.13/block-20241118' of git://git.kernel.dk/linux: (118 commits)
MAINTAINERS: Update git tree for mdraid subsystem
block: make struct rq_list available for !CONFIG_BLOCK
block/genhd: use seq_put_decimal_ull for diskstats decimal values
block: don't reorder requests in blk_mq_add_to_batch
block: don't reorder requests in blk_add_rq_to_plug
block: add a rq_list type
block: remove rq_list_move
virtio_blk: reverse request order in virtio_queue_rqs
nvme-pci: reverse request order in nvme_queue_rqs
btrfs: validate queue limits
block: export blk_validate_limits
nvmet: add tracing of reservation commands
nvme: parse reservation commands's action and rtype to string
nvmet: report ns's vwc not present
md/raid5: Increase r5conf.cache_name size
block: remove the ioprio field from struct request
block: remove the write_hint field from struct request
nvme: check ns's volatile write cache not present
nvme: add rotational support
nvme: use command set independent id ns if available
...
|
||
|
Linus Torvalds
|
3d1b536c13 |
ata changes for 6.13
- Fix typos in comments (Yan Zhen)
- Remove unused macro definitions (Damien Le Moal)
- Switch back to the .remove() callback (Uwe Kleine-König)
- Make use of the get_unaligned_be24() helper instead of open coding
(Andy Shevchenko)
- Refactor and cleanup ata_scsi_simulate() command emulation, such that
all commands use ata_scsi_rbuf_fill() with its own callback
(Damien Le Moal)
- Improve ata_scsi_simulate() command emulation by accurately setting the
SCSI command residual (number of bytes not filled) in the command reply
(Damien Le Moal)
- Add missing iommus property in ahci-platform device tree binding
(Frank Wunderlich)
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Merge tag 'ata-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux
Pull ata updates from Niklas Cassel:
- Fix typos in comments (Yan Zhen)
- Remove unused macro definitions (Damien Le Moal)
- Switch back to the .remove() callback (Uwe Kleine-König)
- Make use of the get_unaligned_be24() helper instead of open coding
(Andy Shevchenko)
- Refactor and cleanup ata_scsi_simulate() command emulation, such that
all commands use ata_scsi_rbuf_fill() with its own callback (Damien
Le Moal)
- Improve ata_scsi_simulate() command emulation by accurately setting
the SCSI command residual (number of bytes not filled) in the command
reply (Damien Le Moal)
- Add missing iommus property in ahci-platform device tree binding
(Frank Wunderlich)
* tag 'ata-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
dt-bindings: ata: ahci-platform: add missing iommus property
ata: libata-scsi: Return residual for emulated SCSI commands
ata: libata-scsi: Remove struct ata_scsi_args
ata: libata-scsi: Document all VPD page inquiry actors
ata: libata-scsi: Refactor ata_scsiop_maint_in()
ata: libata-scsi: Refactor ata_scsiop_read_cap()
ata: libata-scsi: Refactor ata_scsi_simulate()
ata: libata-scsi: Refactor scsi_6_lba_len() with use of get_unaligned_be24()
ata: Switch back to struct platform_driver::remove()
ata: libata: Remove unused macro definitions
ata: Fix typos in the comment
|
||
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Linus Torvalds
|
c14a8a4c04 |
for-6.13-tag
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Merge tag 'for-6.13-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs updates from David Sterba:
"Changes outside of btrfs: add io_uring command flag to track a dying
task (the rest will go via the block git tree).
User visible changes:
- wire encoded read (ioctl) to io_uring commands, this can be used on
itself, in the future this will allow 'send' to be asynchronous. As
a consequence, the encoded read ioctl can also work in non-blocking
mode
- new ioctl to wait for cleaned subvolumes, no need to use the
generic and root-only SEARCH_TREE ioctl, will be used by "btrfs
subvol sync"
- recognize different paths/symlinks for the same devices and don't
report them during rescanning, this can be observed with LVM or DM
- seeding device use case change, the sprout device (the one
capturing new writes) will not clear the read-only status of the
super block; this prevents accumulating space from deleted
snapshots
Performance improvements:
- reduce lock contention when traversing extent buffers
- reduce extent tree lock contention when searching for inline
backref
- switch from rb-trees to xarray for delayed ref tracking,
improvements due to better cache locality, branching factors and
more compact data structures
- enable extent map shrinker again (prevent memory exhaustion under
some types of IO load), reworked to run in a single worker thread
(there used to be problems causing long stalls under memory
pressure)
Core changes:
- raid-stripe-tree feature updates:
- make device replace and scrub work
- implement partial deletion of stripe extents
- new selftests
- split the config option BTRFS_DEBUG and add EXPERIMENTAL for
features that are experimental or with known problems so we don't
misuse debugging config for that
- subpage mode updates (sector < page):
- update compression implementations
- update writepage, writeback
- continued folio API conversions:
- buffered writes
- make buffered write copy one page at a time, preparatory work for
future integration with large folios, may cause performance drop
- proper locking of root item regarding starting send
- error handling improvements
- code cleanups and refactoring:
- dead code removal
- unused parameter reduction
- lockdep assertions"
* tag 'for-6.13-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (119 commits)
btrfs: send: check for read-only send root under critical section
btrfs: send: check for dead send root under critical section
btrfs: remove check for NULL fs_info at btrfs_folio_end_lock_bitmap()
btrfs: fix warning on PTR_ERR() against NULL device at btrfs_control_ioctl()
btrfs: fix a typo in btrfs_use_zone_append
btrfs: avoid superfluous calls to free_extent_map() in btrfs_encoded_read()
btrfs: simplify logic to decrement snapshot counter at btrfs_mksnapshot()
btrfs: remove hole from struct btrfs_delayed_node
btrfs: update stale comment for struct btrfs_delayed_ref_node::add_list
btrfs: add new ioctl to wait for cleaned subvolumes
btrfs: simplify range tracking in cow_file_range()
btrfs: remove conditional path allocation in btrfs_read_locked_inode()
btrfs: push cleanup into btrfs_read_locked_inode()
io_uring/cmd: let cmds to know about dying task
btrfs: add struct io_btrfs_cmd as type for io_uring_cmd_to_pdu()
btrfs: add io_uring command for encoded reads (ENCODED_READ ioctl)
btrfs: move priv off stack in btrfs_encoded_read_regular_fill_pages()
btrfs: don't sleep in btrfs_encoded_read() if IOCB_NOWAIT is set
btrfs: change btrfs_encoded_read() so that reading of extent is done by caller
btrfs: remove pointless iocb::ki_pos addition in btrfs_encoded_read()
...
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||
|
Linus Torvalds
|
3e7447ab48 |
A lot of miscellaneous ext4 bug fixes and cleanups this cycle, most
notably in the journaling code, bufered I/O, and compiler warning cleanups. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEK2m5VNv+CHkogTfJ8vlZVpUNgaMFAmc7NN4ACgkQ8vlZVpUN gaMJRAf+Oc3Tn/ZvuX0amkaBQI+ZNIeYD/U0WBSvarKb00bo1X39mM/0LovqV6ec c51iRgt8U6uDZDUm6zJtppkIUiqkHRj+TmTInueFtmUqhIg8jgfZIpxCn0QkFKnQ jI5EKCkvUqM0B347axH/s+dlOE9JBSlQNKgjkvCYOGknQ1PH6X8oMDt5QAqGEk3P Nsa4QChIxt2yujFvydgFT+RAbjvY3sNvrZ7D3B+KL3VSJpILChVZK/UdFrraSXxq mLO5j4txjtnr/OLgujCTHOfPsTiQReHHXErrSbKhnFhrTXLD0mZSUgJ6irpaxRQ5 wQHQzmsrVwqFfqPU3Hkl8FGeCR0owQ== =26/E -----END PGP SIGNATURE----- Merge tag 'ext4_for_linus-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 updates from Ted Ts'o: "A lot of miscellaneous ext4 bug fixes and cleanups this cycle, most notably in the journaling code, bufered I/O, and compiler warning cleanups" * tag 'ext4_for_linus-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (33 commits) jbd2: Fix comment describing journal_init_common() ext4: prevent an infinite loop in the lazyinit thread ext4: use struct_size() to improve ext4_htree_store_dirent() ext4: annotate struct fname with __counted_by() jbd2: avoid dozens of -Wflex-array-member-not-at-end warnings ext4: use str_yes_no() helper function ext4: prevent delalloc to nodelalloc on remount jbd2: make b_frozen_data allocation always succeed ext4: cleanup variable name in ext4_fc_del() ext4: use string choices helpers jbd2: remove the 'success' parameter from the jbd2_do_replay() function jbd2: remove useless 'block_error' variable jbd2: factor out jbd2_do_replay() jbd2: refactor JBD2_COMMIT_BLOCK process in do_one_pass() jbd2: unified release of buffer_head in do_one_pass() jbd2: remove redundant judgments for check v1 checksum ext4: use ERR_CAST to return an error-valued pointer mm: zero range of eof folio exposed by inode size extension ext4: partial zero eof block on unaligned inode size extension ext4: disambiguate the return value of ext4_dio_write_end_io() ... |
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Linus Torvalds
|
c6d64479d6 |
sanitize struct filename and lookup flags handling in statx
and friends Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQQqUNBr3gm4hGXdBJlZ7Krx/gZQ6wUCZzdpZQAKCRBZ7Krx/gZQ 6whMAQDhlGFV+nGRetwe4t60mVRpxIoc71GLC7b6V8FmyfTI5AEAkAigkJ8KCZDP mfGsN/3PtzoxnIkIqdk7Y7q4/fowyAw= =4DWZ -----END PGP SIGNATURE----- Merge tag 'pull-statx' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull statx updates from Al Viro: "Sanitize struct filename and lookup flags handling in statx and friends" * tag 'pull-statx' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: libfs: kill empty_dir_getattr() fs: Simplify getattr interface function checking AT_GETATTR_NOSEC flag fs/stat.c: switch to CLASS(fd_raw) kill getname_statx_lookup_flags() io_statx_prep(): use getname_uflags() |
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Jiri Kosina
|
903796855b |
Merge branch 'for-6.13/bpf' into for-linus
- improvement of the way hid-bpf coexists with specific drivers (others than hid-generic) that are already bound to devices (Benjamin Tissoires) |
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Jiri Kosina
|
ffca1be9b4 |
Merge branch 'for-6.13/bug-on-to-warn-on' into for-linus
- removal of three way-too-aggressive BUG_ON()s from HID drivers (He Lugang) |
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Jiri Kosina
|
22380b5f03 |
Merge branch 'for-6.13/core' into for-linus
- assorted cleanups and small code fixes (Dmitry Torokhov, Yan Zhen, Nathan Chancellor, Andy Shevchenko) |
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Jiri Kosina
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359bfdc3c9 |
Merge branch 'for-6.13/corsair' into for-linus
- support for Corsair Void headset family (Stuart Hayhurst) |
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Linus Torvalds
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9fb2cfa463 |
ufs cleanups, fixes and folio conversion
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-ufs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull ufs updates from Al Viro:
"ufs cleanups, fixes and folio conversion"
* tag 'pull-ufs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
ufs: ufs_sb_private_info: remove unused s_{2,3}apb fields
ufs: Convert ufs_change_blocknr() to take a folio
ufs: Pass a folio to ufs_new_fragments()
ufs: Convert ufs_inode_getfrag() to take a folio
ufs: Convert ufs_extend_tail() to take a folio
ufs: Convert ufs_inode_getblock() to take a folio
ufs: take the handling of free block counters into a helper
clean ufs_trunc_direct() up a bit...
ufs: get rid of ubh_{ubhcpymem,memcpyubh}()
ufs_inode_getfrag(): remove junk comment
ufs_free_fragments(): fix the braino in sanity check
ufs_clusteracct(): switch to passing fragment number
ufs: untangle ubh_...block...(), part 3
ufs: untangle ubh_...block...(), part 2
ufs: untangle ubh_...block...() macros, part 1
ufs: fix ufs_read_cylinder() failure handling
ufs: missing ->splice_write()
ufs: fix handling of delete_entry and set_link failures
|
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|
Jiri Kosina
|
390b059ac7 |
Merge branch 'for-6.13/goodix' into for-linus
- Support for Goodix GT7986U SPI (Charles Wang) - assorted code cleanups and fixes (Charles Wang) |
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Jiri Kosina
|
d273b820f7 |
Merge branch 'for-6.13/i2c-hid' into for-linus
- code cleanup (Uwe Kleine-König) |
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Jiri Kosina
|
9411aacd72 |
Merge branch 'for-6.13/intel-ish' into for-linus
- exposing firmware versions for Intel-ISH devices that load firmware from the host (Zhang Lixu) - switch to flex-array members (Erick Archer) |
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Jiri Kosina
|
b14927b330 |
Merge branch 'for-6.13/kysona' into for-linus
- initial vendor-specific driver for Kysona, currently adding support for Kysona M600 (Lode Willems) |
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Jiri Kosina
|
a737d9d62d |
Merge branch 'for-6.13/logitech' into for-linus
- unused variable removal in hidpp_root_get_feature() (Bastien Nocera) |
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Jiri Kosina
|
65578513c3 |
Merge branch 'for-6.13/multitouch-v2' into for-linus
- code cleanup for mt_set_mode() (Dmitry Torokhov) |
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Dmitry Torokhov
|
e8a0581914 |
HID: multitouch: make mt_set_mode() less cryptic
mt_set_mode() accepts 2 boolean switches indicating whether the device (if it follows Windows Precision Touchpad specification) should report hardware buttons and/or surface contacts. For a casual reader it is completely not clear, as they look at the call site, which exact mode is being requested. Define report_mode enum and change mt_set_mode() to accept is as an argument instead. This allows to write: mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL); or mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_BUTTONS); which makes intent much more clear. Reviewed-by: Benjamin Tissoires <bentiss@kernel.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Link: https://patch.msgid.link/Zx_hBvg5Qa3KU3ta@google.com Signed-off-by: Benjamin Tissoires <bentiss@kernel.org> |
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Linus Torvalds
|
82339c4911 |
sanitize xattr and io_uring interactions with it,
add *xattrat() syscalls, sanitize struct filename handling in there. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQQqUNBr3gm4hGXdBJlZ7Krx/gZQ6wUCZzdj4gAKCRBZ7Krx/gZQ 6/02AQC8ndn9i1wLGRb5DdZYGNWUDhXCdPrZCF2nyvU2swCIPwEAm1H5F/bxBXeT 6qCLHThVw4KTJOT2aDY03ELrxbi8Vg4= =35Oj -----END PGP SIGNATURE----- Merge tag 'pull-xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull xattr updates from Al Viro: "Sanitize xattr and io_uring interactions with it, add *xattrat() syscalls, sanitize struct filename handling in there" * tag 'pull-xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: xattr: remove redundant check on variable err fs/xattr: add *at family syscalls new helpers: file_removexattr(), filename_removexattr() new helpers: file_listxattr(), filename_listxattr() replace do_getxattr() with saner helpers. replace do_setxattr() with saner helpers. new helper: import_xattr_name() fs: rename struct xattr_ctx to kernel_xattr_ctx xattr: switch to CLASS(fd) io_[gs]etxattr_prep(): just use getname() io_uring: IORING_OP_F[GS]ETXATTR is fine with REQ_F_FIXED_FILE getname_maybe_null() - the third variant of pathname copy-in teach filename_lookup() to treat NULL filename as "" |
||
|
Jiri Kosina
|
873c578324 |
Merge branch 'for-6.13/steelseries' into for-linus
- bugfixes for Steelseries Arctis 1 battery level handling (Bastien Nocera) |
||
|
Jiri Kosina
|
f33e46a0c6 |
Merge branch 'for-6.13/wacom' into for-linus
- Sanitization of BTN_TOOL_RUBBER handling (Jason Gerecke) |
||
|
Linus Torvalds
|
0f25f0e4ef |
the bulk of struct fd memory safety stuff
Making sure that struct fd instances are destroyed in the same
scope where they'd been created, getting rid of reassignments
and passing them by reference, converting to CLASS(fd{,_pos,_raw}).
We are getting very close to having the memory safety of that stuff
trivial to verify.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-fd' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull 'struct fd' class updates from Al Viro:
"The bulk of struct fd memory safety stuff
Making sure that struct fd instances are destroyed in the same scope
where they'd been created, getting rid of reassignments and passing
them by reference, converting to CLASS(fd{,_pos,_raw}).
We are getting very close to having the memory safety of that stuff
trivial to verify"
* tag 'pull-fd' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (28 commits)
deal with the last remaing boolean uses of fd_file()
css_set_fork(): switch to CLASS(fd_raw, ...)
memcg_write_event_control(): switch to CLASS(fd)
assorted variants of irqfd setup: convert to CLASS(fd)
do_pollfd(): convert to CLASS(fd)
convert do_select()
convert vfs_dedupe_file_range().
convert cifs_ioctl_copychunk()
convert media_request_get_by_fd()
convert spu_run(2)
switch spufs_calls_{get,put}() to CLASS() use
convert cachestat(2)
convert do_preadv()/do_pwritev()
fdget(), more trivial conversions
fdget(), trivial conversions
privcmd_ioeventfd_assign(): don't open-code eventfd_ctx_fdget()
o2hb_region_dev_store(): avoid goto around fdget()/fdput()
introduce "fd_pos" class, convert fdget_pos() users to it.
fdget_raw() users: switch to CLASS(fd_raw)
convert vmsplice() to CLASS(fd)
...
|
||
|
Linus Torvalds
|
23acd17754 |
vfs-6.13.ecryptfs
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZzcmVQAKCRCRxhvAZXjc ogE8AP9fT1T0rkYHT2ym2ulnQ2oARqO5VOnGmzYiTs2oHAfn4wD9GwH1nkMvlNTY l7zalIg2AIdN6qvTATSoD3sN+fJXXgU= =RNSE -----END PGP SIGNATURE----- Merge tag 'vfs-6.13.ecryptfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull ecryptfs updates from Christian Brauner: "The folio project is about to remove page->index. This contains the work required for ecryptfs" * tag 'vfs-6.13.ecryptfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: ecryptfs: Pass the folio index to crypt_extent() ecryptfs: Convert lower_offset_for_page() to take a folio ecryptfs: Convert ecryptfs_decrypt_page() to take a folio ecryptfs: Convert ecryptfs_encrypt_page() to take a folio ecryptfs: Convert ecryptfs_write_lower_page_segment() to take a folio ecryptfs: Convert ecryptfs_write() to use a folio ecryptfs: Convert ecryptfs_read_lower_page_segment() to take a folio ecryptfs: Convert ecryptfs_copy_up_encrypted_with_header() to take a folio ecryptfs: Use a folio throughout ecryptfs_read_folio() ecryptfs: Convert ecryptfs_writepage() to ecryptfs_writepages() |
||
|
Linus Torvalds
|
241c7ed4d4 |
vfs-6.13.untorn.writes
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZzcopwAKCRCRxhvAZXjc oitWAQD68PGFI6/ES9x+qGsDFEZBH08icuO+a9dyaZXyNRosDgD/ex2zHj6F7IzS Ghgb9jiqWQ8l2+PDYfisxa/0jiqCbAk= =DmXf -----END PGP SIGNATURE----- Merge tag 'vfs-6.13.untorn.writes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull vfs untorn write support from Christian Brauner: "An atomic write is a write issed with torn-write protection. This means for a power failure or any hardware failure all or none of the data from the write will be stored, never a mix of old and new data. This work is already supported for block devices. If a block device is opened with O_DIRECT and the block device supports atomic write, then FMODE_CAN_ATOMIC_WRITE is added to the file of the opened block device. This contains the work to expand atomic write support to filesystems, specifically ext4 and XFS. Currently, only support for writing exactly one filesystem block atomically is added. Since it's now possible to have filesystem block size > page size for XFS, it's possible to write 4K+ blocks atomically on x86" * tag 'vfs-6.13.untorn.writes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: iomap: drop an obsolete comment in iomap_dio_bio_iter ext4: Do not fallback to buffered-io for DIO atomic write ext4: Support setting FMODE_CAN_ATOMIC_WRITE ext4: Check for atomic writes support in write iter ext4: Add statx support for atomic writes xfs: Support setting FMODE_CAN_ATOMIC_WRITE xfs: Validate atomic writes xfs: Support atomic write for statx fs: iomap: Atomic write support fs: Export generic_atomic_write_valid() block: Add bdev atomic write limits helpers fs/block: Check for IOCB_DIRECT in generic_atomic_write_valid() block/fs: Pass an iocb to generic_atomic_write_valid() |
||
|
Linus Torvalds
|
7956186e75 |
vfs-6.13.tmpfs
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZzcZIgAKCRCRxhvAZXjc oge4AQDxhsKW+v/jKHydzqzwG3Ks7DIxrUg/mcGfdtBwjiWgvwEA8t0QAAfKECAK B0+bNKJ8XJRUtZ10Jgm3dzURbEhBWgU= =4Lui -----END PGP SIGNATURE----- Merge tag 'vfs-6.13.tmpfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull tmpfs case folding updates from Christian Brauner: "This adds case-insensitive support for tmpfs. The work contained in here adds support for case-insensitive file names lookups in tmpfs. The main difference from other casefold filesystems is that tmpfs has no information on disk, just on RAM, so we can't use mkfs to create a case-insensitive tmpfs. For this implementation, there's a mount option for casefolding. The rest of the patchset follows a similar approach as ext4 and f2fs. The use case for this feature is similar to the use case for ext4, to better support compatibility layers (like Wine), particularly in combination with sandboxing/container tools (like Flatpak). Those containerization tools can share a subset of the host filesystem with an application. In the container, the root directory and any parent directories required for a shared directory are on tmpfs, with the shared directories bind-mounted into the container's view of the filesystem. If the host filesystem is using case-insensitive directories, then the application can do lookups inside those directories in a case-insensitive way, without this needing to be implemented in user-space. However, if the host is only sharing a subset of a case-insensitive directory with the application, then the parent directories of the mount point will be part of the container's root tmpfs. When the application tries to do case-insensitive lookups of those parent directories on a case-sensitive tmpfs, the lookup will fail" * tag 'vfs-6.13.tmpfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: tmpfs: Initialize sysfs during tmpfs init tmpfs: Fix type for sysfs' casefold attribute libfs: Fix kernel-doc warning in generic_ci_validate_strict_name docs: tmpfs: Add casefold options tmpfs: Expose filesystem features via sysfs tmpfs: Add flag FS_CASEFOLD_FL support for tmpfs dirs tmpfs: Add casefold lookup support libfs: Export generic_ci_ dentry functions unicode: Recreate utf8_parse_version() unicode: Export latest available UTF-8 version number ext4: Use generic_ci_validate_strict_name helper libfs: Create the helper function generic_ci_validate_strict_name() |
||
|
Linus Torvalds
|
a5ca574796 |
vfs-6.13.usercopy
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZzchMwAKCRCRxhvAZXjc okICAP4h6tDl7dgTv8GkL0tgaHi/36m+ilctXbEtIe9fbkc/fQD8D5t6jYaz47gu zVY7qOrtQOQ/diNavzxyky99Uh3dKgo= =lwkw -----END PGP SIGNATURE----- Merge tag 'vfs-6.13.usercopy' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull copy_struct_to_user helper from Christian Brauner: "This adds a copy_struct_to_user() helper which is a companion helper to the already widely used copy_struct_from_user(). It copies a struct from kernel space to userspace, in a way that guarantees backwards-compatibility for struct syscall arguments as long as future struct extensions are made such that all new fields are appended to the old struct, and zeroed-out new fields have the same meaning as the old struct. The first user is sched_getattr() system call but the new extensible pidfs ioctl will be ported to it as well" * tag 'vfs-6.13.usercopy' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: sched_getattr: port to copy_struct_to_user uaccess: add copy_struct_to_user helper |
||
|
Linus Torvalds
|
909d3b571e |
vfs-6.13.pidfs
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZzcg9wAKCRCRxhvAZXjc ou7GAQDtQ75C+DFjrL4alXjYG7uly0BWgrlRJ4SgNu1I0uUYdgD/UHH2fAkQeKGy xTGT4z0abiELZw9RQ7F6qbiBhA0nIw8= =Plww -----END PGP SIGNATURE----- Merge tag 'vfs-6.13.pidfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull pidfs update from Christian Brauner: "This adds a new ioctl to retrieve information about a pidfd. A common pattern when using pidfds is having to get information about the process, which currently requires /proc being mounted, resolving the fd to a pid, and then do manual string parsing of /proc/N/status and friends. This needs to be reimplemented over and over in all userspace projects (e.g.: it has been reimplemented in systemd, dbus, dbus-daemon, polkit so far), and requires additional care in checking that the fd is still valid after having parsed the data, to avoid races. Having a programmatic API that can be used directly removes all these requirements, including having /proc mounted. As discussed at LPC24, add an ioctl with an extensible struct so that more parameters can be added later if needed. Start with returning pid/tgid/ppid and some creds unconditionally, and cgroupid optionally" * tag 'vfs-6.13.pidfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: pidfd: add ioctl to retrieve pid info |
||
|
Linus Torvalds
|
a29835c9d0 |
vfs-6.13.ovl
-----BEGIN PGP SIGNATURE-----
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Merge tag 'vfs-6.13.ovl' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull overlayfs updates from Christian Brauner:
"Make overlayfs support specifying layers through file descriptors.
Currently overlayfs only allows specifying layers through path names.
This is inconvenient for users that want to assemble an overlayfs
mount purely based on file descriptors:
This enables user to specify both:
fsconfig(fd_overlay, FSCONFIG_SET_FD, "upperdir+", NULL, fd_upper);
fsconfig(fd_overlay, FSCONFIG_SET_FD, "workdir+", NULL, fd_work);
fsconfig(fd_overlay, FSCONFIG_SET_FD, "lowerdir+", NULL, fd_lower1);
fsconfig(fd_overlay, FSCONFIG_SET_FD, "lowerdir+", NULL, fd_lower2);
in addition to:
fsconfig(fd_overlay, FSCONFIG_SET_STRING, "upperdir+", "/upper", 0);
fsconfig(fd_overlay, FSCONFIG_SET_STRING, "workdir+", "/work", 0);
fsconfig(fd_overlay, FSCONFIG_SET_STRING, "lowerdir+", "/lower1", 0);
fsconfig(fd_overlay, FSCONFIG_SET_STRING, "lowerdir+", "/lower2", 0);
There's also a large set of new overlayfs selftests to test new
features and some older properties"
* tag 'vfs-6.13.ovl' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
selftests: add test for specifying 500 lower layers
selftests: add overlayfs fd mounting selftests
selftests: use shared header
Documentation,ovl: document new file descriptor based layers
ovl: specify layers via file descriptors
fs: add helper to use mount option as path or fd
|
||
|
Linus Torvalds
|
4c797b11a8 |
vfs-6.13.file
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Merge tag 'vfs-6.13.file' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs file updates from Christian Brauner:
"This contains changes the changes for files for this cycle:
- Introduce a new reference counting mechanism for files.
As atomic_inc_not_zero() is implemented with a try_cmpxchg() loop
it has O(N^2) behaviour under contention with N concurrent
operations and it is in a hot path in __fget_files_rcu().
The rcuref infrastructures remedies this problem by using an
unconditional increment relying on safe- and dead zones to make
this work and requiring rcu protection for the data structure in
question. This not just scales better it also introduces overflow
protection.
However, in contrast to generic rcuref, files require a memory
barrier and thus cannot rely on *_relaxed() atomic operations and
also require to be built on atomic_long_t as having massive amounts
of reference isn't unheard of even if it is just an attack.
This adds a file specific variant instead of making this a generic
library.
This has been tested by various people and it gives consistent
improvement up to 3-5% on workloads with loads of threads.
- Add a fastpath for find_next_zero_bit(). Skip 2-levels searching
via find_next_zero_bit() when there is a free slot in the word that
contains the next fd. This improves pts/blogbench-1.1.0 read by 8%
and write by 4% on Intel ICX 160.
- Conditionally clear full_fds_bits since it's very likely that a bit
in full_fds_bits has been cleared during __clear_open_fds(). This
improves pts/blogbench-1.1.0 read up to 13%, and write up to 5% on
Intel ICX 160.
- Get rid of all lookup_*_fdget_rcu() variants. They were used to
lookup files without taking a reference count. That became invalid
once files were switched to SLAB_TYPESAFE_BY_RCU and now we're
always taking a reference count. Switch to an already existing
helper and remove the legacy variants.
- Remove pointless includes of <linux/fdtable.h>.
- Avoid cmpxchg() in close_files() as nobody else has a reference to
the files_struct at that point.
- Move close_range() into fs/file.c and fold __close_range() into it.
- Cleanup calling conventions of alloc_fdtable() and expand_files().
- Merge __{set,clear}_close_on_exec() into one.
- Make __set_open_fd() set cloexec as well instead of doing it in two
separate steps"
* tag 'vfs-6.13.file' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
selftests: add file SLAB_TYPESAFE_BY_RCU recycling stressor
fs: port files to file_ref
fs: add file_ref
expand_files(): simplify calling conventions
make __set_open_fd() set cloexec state as well
fs: protect backing files with rcu
file.c: merge __{set,clear}_close_on_exec()
alloc_fdtable(): change calling conventions.
fs/file.c: add fast path in find_next_fd()
fs/file.c: conditionally clear full_fds
fs/file.c: remove sanity_check and add likely/unlikely in alloc_fd()
move close_range(2) into fs/file.c, fold __close_range() into it
close_files(): don't bother with xchg()
remove pointless includes of <linux/fdtable.h>
get rid of ...lookup...fdget_rcu() family
|
||
|
Linus Torvalds
|
8dcf44fcad |
vfs-6.13.netfs
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Merge tag 'vfs-6.13.netfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull netfs updates from Christian Brauner:
"Various fixes for the netfs library and related infrastructure:
cachefiles:
- Fix a dentry leak in cachefiles_open_file()
- Fix incorrect length return value in
cachefiles_ondemand_fd_write_iter()
- Fix missing pos updates in cachefiles_ondemand_fd_write_iter()
- Clean up in cachefiles_commit_tmpfile()
- Fix NULL pointer dereference in object->file
- Add a memory barrier for FSCACHE_VOLUME_CREATING
netfs:
- Remove call to folio_index()
- Fix a few minor bugs in netfs_page_mkwrite()
- Remove unnecessary references to pages"
* tag 'vfs-6.13.netfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
netfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING
cachefiles: Fix NULL pointer dereference in object->file
cachefiles: Clean up in cachefiles_commit_tmpfile()
cachefiles: Fix missing pos updates in cachefiles_ondemand_fd_write_iter()
cachefiles: Fix incorrect length return value in cachefiles_ondemand_fd_write_iter()
netfs: Remove unnecessary references to pages
netfs: Fix a few minor bugs in netfs_page_mkwrite()
netfs: Remove call to folio_index()
|
||
|
Linus Torvalds
|
56be9aaf98 |
vfs-6.13.pagecache
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZzcUQAAKCRCRxhvAZXjc onEpAQCUdwIBHpwmSIFvJFA9aNGpbLzi0dDSEIxuWYtp5qVuogD+ImccwqpG3kEi Zq9vokdPpB1zbahxKl1mkvBG4G0GFQE= =LbP6 -----END PGP SIGNATURE----- Merge tag 'vfs-6.13.pagecache' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull vfs pagecache updates from Christian Brauner: "Cleanup filesystem page flag usage: This continues the work to make the mappedtodisk/owner_2 flag available to filesystems which don't use buffer heads. Further patches remove uses of Private2. This brings us very close to being rid of it entirely" * tag 'vfs-6.13.pagecache' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: migrate: Remove references to Private2 ceph: Remove call to PagePrivate2() btrfs: Switch from using the private_2 flag to owner_2 mm: Remove PageMappedToDisk nilfs2: Convert nilfs_copy_buffer() to use folios fs: Move clearing of mappedtodisk to buffer.c |
||
|
Linus Torvalds
|
5bb6ba448f |
vfs-6.13.rust.file
-----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZzcT8AAKCRCRxhvAZXjc or+CAQDb2JkNOVrugXw++kgvHrLBY+7rCzyA+sJhiZu7C7uQogEApQgGP1kjmpi0 f1wR6xomb9AmQNd991F0VWXCPBTUsAk= =RQnY -----END PGP SIGNATURE----- Merge tag 'vfs-6.13.rust.file' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull vfs rust file abstractions from Christian Brauner: "This contains the file abstractions needed by the Rust implementation of the Binder driver and other parts of the kernel. Let's treat this as a first attempt at getting something working but I do expect the actual interfaces to change significantly over time. Simply because we are still figuring out what actually works. But there's no point in further theorizing. Let's see how it holds up with actual users" * tag 'vfs-6.13.rust.file' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: rust: task: adjust safety comments in Task methods rust: add seqfile abstraction rust: file: add abstraction for `poll_table` rust: file: add `Kuid` wrapper rust: file: add `FileDescriptorReservation` rust: security: add abstraction for secctx rust: cred: add Rust abstraction for `struct cred` rust: file: add Rust abstraction for `struct file` rust: task: add `Task::current_raw` rust: types: add `NotThreadSafe` |
||
|
Linus Torvalds
|
70e7730c2a |
vfs-6.13.misc
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Merge tag 'vfs-6.13.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull misc vfs updates from Christian Brauner:
"Features:
- Fixup and improve NLM and kNFSD file lock callbacks
Last year both GFS2 and OCFS2 had some work done to make their
locking more robust when exported over NFS. Unfortunately, part of
that work caused both NLM (for NFS v3 exports) and kNFSD (for
NFSv4.1+ exports) to no longer send lock notifications to clients
This in itself is not a huge problem because most NFS clients will
still poll the server in order to acquire a conflicted lock
It's important for NLM and kNFSD that they do not block their
kernel threads inside filesystem's file_lock implementations
because that can produce deadlocks. We used to make sure of this by
only trusting that posix_lock_file() can correctly handle blocking
lock calls asynchronously, so the lock managers would only setup
their file_lock requests for async callbacks if the filesystem did
not define its own lock() file operation
However, when GFS2 and OCFS2 grew the capability to correctly
handle blocking lock requests asynchronously, they started
signalling this behavior with EXPORT_OP_ASYNC_LOCK, and the check
for also trusting posix_lock_file() was inadvertently dropped, so
now most filesystems no longer produce lock notifications when
exported over NFS
Fix this by using an fop_flag which greatly simplifies the problem
and grooms the way for future uses by both filesystems and lock
managers alike
- Add a sysctl to delete the dentry when a file is removed instead of
making it a negative dentry
Commit
|
||
|
Linus Torvalds
|
4eb98b7760 |
vfs-6.13.mount.api
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Linus Torvalds
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6ac81fd55e |
vfs-6.13.mgtime
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Merge tag 'vfs-6.13.mgtime' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs multigrain timestamps from Christian Brauner:
"This is another try at implementing multigrain timestamps. This time
with significant help from the timekeeping maintainers to reduce the
performance impact.
Thomas provided a base branch that contains the required timekeeping
interfaces for the VFS. It serves as the base for the multi-grain
timestamp work:
- Multigrain timestamps allow the kernel to use fine-grained
timestamps when an inode's attributes is being actively observed
via ->getattr(). With this support, it's possible for a file to get
a fine-grained timestamp, and another modified after it to get a
coarse-grained stamp that is earlier than the fine-grained time. If
this happens then the files can appear to have been modified in
reverse order, which breaks VFS ordering guarantees.
To prevent this, a floor value is maintained for multigrain
timestamps. Whenever a fine-grained timestamp is handed out, record
it, and when later coarse-grained stamps are handed out, ensure
they are not earlier than that value. If the coarse-grained
timestamp is earlier than the fine-grained floor, return the floor
value instead.
The timekeeper changes add a static singleton atomic64_t into
timekeeper.c that is used to keep track of the latest fine-grained
time ever handed out. This is tracked as a monotonic ktime_t value
to ensure that it isn't affected by clock jumps. Because it is
updated at different times than the rest of the timekeeper object,
the floor value is managed independently of the timekeeper via a
cmpxchg() operation, and sits on its own cacheline.
Two new public timekeeper interfaces are added:
(1) ktime_get_coarse_real_ts64_mg() fills a timespec64 with the
later of the coarse-grained clock and the floor time
(2) ktime_get_real_ts64_mg() gets the fine-grained clock value,
and tries to swap it into the floor. A timespec64 is filled
with the result.
- The VFS has always used coarse-grained timestamps when updating the
ctime and mtime after a change. This has the benefit of allowing
filesystems to optimize away a lot metadata updates, down to around
1 per jiffy, even when a file is under heavy writes.
Unfortunately, this has always been an issue when we're exporting
via NFSv3, which relies on timestamps to validate caches. A lot of
changes can happen in a jiffy, so timestamps aren't sufficient to
help the client decide when to invalidate the cache. Even with
NFSv4, a lot of exported filesystems don't properly support a
change attribute and are subject to the same problems with
timestamp granularity. Other applications have similar issues with
timestamps (e.g backup applications).
If we were to always use fine-grained timestamps, that would
improve the situation, but that becomes rather expensive, as the
underlying filesystem would have to log a lot more metadata
updates.
This adds a way to only use fine-grained timestamps when they are
being actively queried. Use the (unused) top bit in
inode->i_ctime_nsec as a flag that indicates whether the current
timestamps have been queried via stat() or the like. When it's set,
we allow the kernel to use a fine-grained timestamp iff it's
necessary to make the ctime show a different value.
This solves the problem of being able to distinguish the timestamp
between updates, but introduces a new problem: it's now possible
for a file being changed to get a fine-grained timestamp. A file
that is altered just a bit later can then get a coarse-grained one
that appears older than the earlier fine-grained time. This
violates timestamp ordering guarantees.
This is where the earlier mentioned timkeeping interfaces help. A
global monotonic atomic64_t value is kept that acts as a timestamp
floor. When we go to stamp a file, we first get the latter of the
current floor value and the current coarse-grained time. If the
inode ctime hasn't been queried then we just attempt to stamp it
with that value.
If it has been queried, then first see whether the current coarse
time is later than the existing ctime. If it is, then we accept
that value. If it isn't, then we get a fine-grained time and try to
swap that into the global floor. Whether that succeeds or fails, we
take the resulting floor time, convert it to realtime and try to
swap that into the ctime.
We take the result of the ctime swap whether it succeeds or fails,
since either is just as valid.
Filesystems can opt into this by setting the FS_MGTIME fstype flag.
Others should be unaffected (other than being subject to the same
floor value as multigrain filesystems)"
* tag 'vfs-6.13.mgtime' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
fs: reduce pointer chasing in is_mgtime() test
tmpfs: add support for multigrain timestamps
btrfs: convert to multigrain timestamps
ext4: switch to multigrain timestamps
xfs: switch to multigrain timestamps
Documentation: add a new file documenting multigrain timestamps
fs: add percpu counters for significant multigrain timestamp events
fs: tracepoints around multigrain timestamp events
fs: handle delegated timestamps in setattr_copy_mgtime
timekeeping: Add percpu counter for tracking floor swap events
timekeeping: Add interfaces for handling timestamps with a floor value
fs: have setattr_copy handle multigrain timestamps appropriately
fs: add infrastructure for multigrain timestamps
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