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The source for the Linux kernel used in Windows Subsystem for Linux 2 (WSL2)
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Dai Ngo c3b2013544 fs/lock: add 2 callbacks to lock_manager_operations to resolve conflict 
[ Upstream commit 2443da2259 ]

Add 2 new callbacks, lm_lock_expirable and lm_expire_lock, to
lock_manager_operations to allow the lock manager to take appropriate
action to resolve the lock conflict if possible.

A new field, lm_mod_owner, is also added to lock_manager_operations.
The lm_mod_owner is used by the fs/lock code to make sure the lock
manager module such as nfsd, is not freed while lock conflict is being
resolved.

lm_lock_expirable checks and returns true to indicate that the lock
conflict can be resolved else return false. This callback must be
called with the flc_lock held so it can not block.

lm_expire_lock is called to resolve the lock conflict if the returned
value from lm_lock_expirable is true. This callback is called without
the flc_lock held since it's allowed to block. Upon returning from
this callback, the lock conflict should be resolved and the caller is
expected to restart the conflict check from the beginnning of the list.

Lock manager, such as NFSv4 courteous server, uses this callback to
resolve conflict by destroying lock owner, or the NFSv4 courtesy client
(client that has expired but allowed to maintains its states) that owns
the lock.

Reviewed-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
 		2024-04-10 16:19:04 +02:00
Documentation fs/lock: add 2 callbacks to lock_manager_operations to resolve conflict 2024-04-10 16:19:04 +02:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
arch x86/static_call: Add support for Jcc tail-calls 2024-04-10 16:18:49 +02:00
block block: Clear zone limits for a non-zoned stacked queue 2024-04-10 16:18:35 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto exit: Rename module_put_and_exit to module_put_and_kthread_exit 2024-04-10 16:18:55 +02:00
drivers x86/rfds: Mitigate Register File Data Sampling (RFDS) 2024-04-10 16:18:48 +02:00
fs fs/lock: add 2 callbacks to lock_manager_operations to resolve conflict 2024-04-10 16:19:04 +02:00
include fs/lock: add 2 callbacks to lock_manager_operations to resolve conflict 2024-04-10 16:19:04 +02:00
init modules: wait do_free_init correctly 2024-03-26 18:21:31 -04:00
io_uring io_uring: don't save/restore iowait state 2024-03-26 18:21:35 -04:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-08 11:28:45 +01:00
kernel fsnotify: make allow_dups a property of the group 2024-04-10 16:19:02 +02:00
lib arch: Introduce CONFIG_FUNCTION_ALIGNMENT 2024-04-10 16:18:49 +02:00
mm memtest: use {READ,WRITE}_ONCE in memory scanning 2024-04-10 16:18:42 +02:00
net NFSD: Move svc_serv_ops::svo_function into struct svc_serv 2024-04-10 16:19:01 +02:00
samples samples/hw_breakpoint: fix building without module unloading 2023-09-23 11:10:01 +02:00
scripts kbuild: Move -Wenum-{compare-conditional,enum-conversion} into W=1 2024-04-10 16:18:41 +02:00
security landlock: Warn once if a Landlock action is requested while disabled 2024-04-10 16:18:39 +02:00
sound ALSA: hda/realtek - Fix headset Mic no show at resume back for Lenovo ALC897 platform 2024-04-10 16:18:45 +02:00
tools exit: Rename module_put_and_exit to module_put_and_kthread_exit 2024-04-10 16:18:55 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: Always flush async #PF workqueue when vCPU is being destroyed 2024-04-10 16:18:34 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS iio: stx104: Move to addac subdirectory 2023-08-26 14:23:27 +02:00
Makefile arch: Introduce CONFIG_FUNCTION_ALIGNMENT 2024-04-10 16:18:49 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.