linux/drivers/misc
Linus Torvalds 615e95831e v6.6-vfs.ctime
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZOXTKAAKCRCRxhvAZXjc
 oifJAQCzi/p+AdQu8LA/0XvR7fTwaq64ZDCibU4BISuLGT2kEgEAuGbuoFZa0rs2
 XYD/s4+gi64p9Z01MmXm2XO1pu3GPg0=
 =eJz5
 -----END PGP SIGNATURE-----

Merge tag 'v6.6-vfs.ctime' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs timestamp updates from Christian Brauner:
 "This adds VFS support for multi-grain timestamps and converts tmpfs,
  xfs, ext4, and btrfs to use them. This carries acks from all relevant
  filesystems.

  The VFS always uses coarse-grained timestamps when updating the ctime
  and mtime after a change. This has the benefit of allowing filesystems
  to optimize away a lot of 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 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 introduces fine-grained timestamps that are used when they are
  actively queried.

  This uses the 31st bit of the ctime tv_nsec field to indicate that
  something has queried the inode for the mtime or ctime. When this flag
  is set, on the next mtime or ctime update, the kernel will fetch a
  fine-grained timestamp instead of the usual coarse-grained one.

  As POSIX generally mandates that when the mtime changes, the ctime
  must also change the kernel always stores normalized ctime values, so
  only the first 30 bits of the tv_nsec field are ever used.

  Filesytems can opt into this behavior by setting the FS_MGTIME flag in
  the fstype. Filesystems that don't set this flag will continue to use
  coarse-grained timestamps.

  Various preparatory changes, fixes and cleanups are included:

   - Fixup all relevant places where POSIX requires updating ctime
     together with mtime. This is a wide-range of places and all
     maintainers provided necessary Acks.

   - Add new accessors for inode->i_ctime directly and change all
     callers to rely on them. Plain accesses to inode->i_ctime are now
     gone and it is accordingly rename to inode->__i_ctime and commented
     as requiring accessors.

   - Extend generic_fillattr() to pass in a request mask mirroring in a
     sense the statx() uapi. This allows callers to pass in a request
     mask to only get a subset of attributes filled in.

   - Rework timestamp updates so it's possible to drop the @now
     parameter the update_time() inode operation and associated helpers.

   - Add inode_update_timestamps() and convert all filesystems to it
     removing a bunch of open-coding"

* tag 'v6.6-vfs.ctime' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (107 commits)
  btrfs: convert to multigrain timestamps
  ext4: switch to multigrain timestamps
  xfs: switch to multigrain timestamps
  tmpfs: add support for multigrain timestamps
  fs: add infrastructure for multigrain timestamps
  fs: drop the timespec64 argument from update_time
  xfs: have xfs_vn_update_time gets its own timestamp
  fat: make fat_update_time get its own timestamp
  fat: remove i_version handling from fat_update_time
  ubifs: have ubifs_update_time use inode_update_timestamps
  btrfs: have it use inode_update_timestamps
  fs: drop the timespec64 arg from generic_update_time
  fs: pass the request_mask to generic_fillattr
  fs: remove silly warning from current_time
  gfs2: fix timestamp handling on quota inodes
  fs: rename i_ctime field to __i_ctime
  selinux: convert to ctime accessor functions
  security: convert to ctime accessor functions
  apparmor: convert to ctime accessor functions
  sunrpc: convert to ctime accessor functions
  ...
2023-08-28 09:31:32 -07:00
..
altera-stapl misc: add HAS_IOPORT dependencies 2023-05-29 15:05:00 +01:00
bcm-vk misc: bcm_vk: Remove usage of deprecated functions 2022-09-01 16:29:32 +02:00
c2port driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
cardreader misc: rtsx: judge ASPM Mode to set PETXCFG Reg 2023-08-04 15:52:43 +02:00
cb710
cxl driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
echo
eeprom Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
genwqe - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of 2023-04-27 19:42:02 -07:00
ibmasm ibm: convert to ctime accessor functions 2023-07-13 10:28:02 +02:00
lis3lv02d misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
lkdtm Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
mchp_pci1xxxx misc: microchip: pci1xxxx: Convert to immutable irqchip 2023-03-09 18:07:29 +01:00
mei Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
ocxl driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
pvpanic misc/pvpanic: Convert regular spinlock into trylock on panic path 2022-04-29 16:54:59 +02:00
sgi-gru mm: ptep_get() conversion 2023-06-19 16:19:25 -07:00
sgi-xp sgi-xp: simplify sysctl registration 2023-03-09 17:32:13 +01:00
ti-st drivers: misc: ti-st: Fix a typo ("unknow") 2023-01-31 13:02:46 +01:00
uacce uacce: vma_close clears q->qfrs when freeing qfrs 2023-05-31 19:00:26 +01:00
vmw_vmci Char/Misc drivers for 6.4-rc1 2023-04-27 12:07:50 -07:00
ad525x_dpot-i2c.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
ad525x_dpot-spi.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
ad525x_dpot.c misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
ad525x_dpot.h misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
apds990x.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
apds9802als.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
atmel-ssc.c misc: update maintainer email address and description for atmel-ssc 2022-08-03 11:03:03 +02:00
bh1770glc.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
cs5535-mfgpt.c
ds1682.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
dummy-irq.c
dw-xdata-pcie.c
enclosure.c drivers: remove struct module * setting from struct class 2023-03-17 15:16:27 +01:00
fastrpc.c misc: fastrpc: check return value of devm_kasprintf() 2023-06-19 17:13:24 +02:00
gehc-achc.c
hi6421v600-irq.c misc: hi6421-spmi-pmic: Use generic_handle_irq_safe(). 2022-03-02 22:28:50 +01:00
hisi_hikey_usb.c
hmc6352.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
hpilo.c Char/Misc drivers for 6.4-rc1 2023-04-27 12:07:50 -07:00
hpilo.h
ibmvmc.c ibm: convert to ctime accessor functions 2023-07-13 10:28:02 +02:00
ibmvmc.h
ics932s401.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
isl29003.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
isl29020.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
Kconfig misc: tps6594-pfsm: Add driver for TI TPS6594 PFSM 2023-06-15 13:41:53 +02:00
kgdbts.c kgdbts: fix return value of __setup handler 2022-03-18 14:17:56 +01:00
lattice-ecp3-config.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
Makefile misc: tps6594-pfsm: Add driver for TI TPS6594 PFSM 2023-06-15 13:41:53 +02:00
open-dice.c mm: replace vma->vm_flags direct modifications with modifier calls 2023-02-09 16:51:39 -08:00
pch_phub.c
pci_endpoint_test.c misc: pci_endpoint_test: Simplify pci_endpoint_test_msi_irq() 2023-06-23 15:04:15 -05:00
phantom.c driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
qcom-coincell.c
smpro-errmon.c misc: smpro-errmon: Remove the unneeded include <linux/i2c.h> 2023-05-31 19:00:10 +01:00
smpro-misc.c misc: smpro-misc: Add Ampere's Altra SMpro misc driver 2022-11-10 19:03:03 +01:00
sram-exec.c mm: Introduce set_memory_rox() 2022-12-15 10:37:26 -08:00
sram.c misc/genalloc: Name subpools by of_node_full_name() 2023-07-26 09:45:01 +02:00
sram.h misc: sram: Improve and simplify clk handling 2023-03-09 17:31:53 +01:00
tifm_7xx1.c misc: tifm: fix possible memory leak in tifm_7xx1_switch_media() 2022-11-23 19:55:26 +01:00
tifm_core.c driver core: make struct bus_type.uevent() take a const * 2023-01-27 13:45:52 +01:00
tps6594-esm.c misc: tps6594-esm: Disable ESM for rev 1 PMIC 2023-08-04 15:52:51 +02:00
tps6594-pfsm.c misc: tps6594-pfsm: Add driver for TI TPS6594 PFSM 2023-06-15 13:41:53 +02:00
tsl2550.c misc: Switch i2c drivers back to use .probe() 2023-05-29 15:04:52 +01:00
vcpu_stall_detector.c misc: Add a mechanism to detect stalls on guest vCPUs 2022-07-14 16:54:17 +02:00
vmw_balloon.c misc: vmw_balloon: fix memory leak with using debugfs_lookup() 2023-02-08 13:24:22 +01:00
xilinx_sdfec.c misc/xilinx_sdfec: remove redundant _{open, release} function 2023-05-31 18:59:56 +01:00
xilinx_tmr_inject.c drivers: misc: Add Support for TMR Inject IP 2023-01-20 13:10:15 +01:00
xilinx_tmr_manager.c drivers: misc: Add Support for TMR Manager 2023-01-20 13:09:30 +01:00