WSL2-Linux-Kernel/fs/dlm/Kconfig

# SPDX-License-Identifier: GPL-2.0-only
menuconfig DLM
	tristate "Distributed Lock Manager (DLM)"
	depends on INET
	depends on SYSFS && CONFIGFS_FS && (IPV6 || IPV6=n)
	select IP_SCTP
	select SRCU
	help
	A general purpose distributed lock manager for kernel or userspace
	applications.

config DLM_DEPRECATED_API
	bool "DLM deprecated API"
	depends on DLM
	help
	Enables deprecated DLM timeout features that will be removed in
        later Linux kernel releases.

	If you are unsure, say N.

config DLM_DEBUG
	bool "DLM debugging"
	depends on DLM
	help
	Under the debugfs mount point, the name of each lockspace will
	appear as a file in the "dlm" directory.  The output is the
	list of resource and locks the local node knows about.
treewide: Add SPDX license identifier - Makefile/Kconfig Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2019-05-19 15:07:45 +03:00			`# SPDX-License-Identifier: GPL-2.0-only`
menuconfig: transform NLS and DLM menus Changes NLS and DLM menus into a 'menuconfig' object so that it can be disabled at once without having to enter the menu first to disable the config option. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2007-10-17 10:30:15 +04:00			`menuconfig DLM`
[DLM] The core of the DLM for GFS2/CLVM This is the core of the distributed lock manager which is required to use GFS2 as a cluster filesystem. It is also used by CLVM and can be used as a standalone lock manager independantly of either of these two projects. It implements VAX-style locking modes. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steve Whitehouse <swhiteho@redhat.com> 2006-01-18 12:30:29 +03:00			`tristate "Distributed Lock Manager (DLM)"`
fs/dlm: remove CONFIG_EXPERIMENTAL This config item has not carried much meaning for a while now and is almost always enabled by default. As agreed during the Linux kernel summit, remove it. CC: Christine Caulfield <ccaulfie@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David Teigland <teigland@redhat.com> 2012-10-24 00:03:38 +04:00			`depends on INET`
dlm: Make DLM depend on CONFIGFS_FS This patch fixes the following kconfig error after changing CONFIGFS_FS -> select SYSFS: fs/sysfs/Kconfig:1:error: recursive dependency detected! fs/sysfs/Kconfig:1: symbol SYSFS is selected by CONFIGFS_FS fs/configfs/Kconfig:1: symbol CONFIGFS_FS is selected by DLM fs/dlm/Kconfig:1: symbol DLM depends on SYSFS Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org> Cc: Joel Becker <jlbec@evilplan.org> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: James Bottomley <James.Bottomley@suse.de> 2011-01-17 00:14:52 +03:00			`depends on SYSFS && CONFIGFS_FS && (IPV6 \|\| IPV6=n)`
[DLM] Consolidate transport protocols This patch consolidates the TCP & SCTP protocols for the DLM into a single file and makes it switchable at run-time (well, at least before the DLM actually starts up!) For RHEL5 this patch requires Neil Horman's patch that expands the in-kernel socket API but that has already been twice ACKed so it should be OK. The patch adds a new lowcomms.c file that replaces the existing lowcomms-sctp.c & lowcomms-tcp.c files. Signed-off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> 2007-04-17 18:39:57 +04:00			`select IP_SCTP`
fs: dlm: make connection hash lockless There are some problems with the connections_lock. During my experiements I saw sometimes circular dependencies with sock_lock. The reason here might be code parts which runs nodeid2con() before or after sock_lock is acquired. Another issue are missing locks in for_conn() iteration. Maybe this works fine because for_conn() is running in a context where connection_hash cannot be manipulated by others anymore. However this patch changes the connection_hash to be protected by sleepable rcu. The hotpath function __find_con() is implemented lockless as it is only a reader of connection_hash and this hopefully fixes the circular locking dependencies. The iteration for_conn() will still call some sleepable functionality, that's why we use sleepable rcu in this case. This patch removes the kmemcache functionality as I think I need to make some free() functionality via call_rcu(). However allocation time isn't here an issue. The dlm_allow_con will not be protected by a lock anymore as I think it's enough to just set and flush workqueues afterwards. Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com> 2020-08-27 22:02:49 +03:00			`select SRCU`
[DLM] The core of the DLM for GFS2/CLVM This is the core of the distributed lock manager which is required to use GFS2 as a cluster filesystem. It is also used by CLVM and can be used as a standalone lock manager independantly of either of these two projects. It implements VAX-style locking modes. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steve Whitehouse <swhiteho@redhat.com> 2006-01-18 12:30:29 +03:00			`help`
[DLM] Consolidate transport protocols This patch consolidates the TCP & SCTP protocols for the DLM into a single file and makes it switchable at run-time (well, at least before the DLM actually starts up!) For RHEL5 this patch requires Neil Horman's patch that expands the in-kernel socket API but that has already been twice ACKed so it should be OK. The patch adds a new lowcomms.c file that replaces the existing lowcomms-sctp.c & lowcomms-tcp.c files. Signed-off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> 2007-04-17 18:39:57 +04:00			`A general purpose distributed lock manager for kernel or userspace`
			`applications.`
[DLM] Add support for tcp communications The following patch adds a TCP based communications layer to the DLM which is compile time selectable. The existing SCTP layer gives the advantage of allowing multihoming, whereas the TCP layer has been heavily tested in previous versions of the DLM and is known to be robust and therefore can be used as a baseline for performance testing. Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> 2006-11-02 19:19:21 +03:00
fs: dlm: add deprecation Kconfig and warnings for timeouts This patch adds a CONFIG_DLM_DEPRECATED_API Kconfig option that must be enabled to use two timeout-related features that we intend to remove in kernel v6.2. Warnings are printed if either is enabled and used. Neither has ever been used as far as we know. . The DLM_LSFL_TIMEWARN lockspace creation flag will be removed, along with the associated configfs entry for setting the timeout. Setting the flag and configfs file would cause dlm to track how long locks were waiting for reply messages. After a timeout, a kernel message would be logged, and a netlink message would be sent to userspace. Recently, midcomms messages have been added that produce much better logging about actual problems with messages. No use has ever been found for the netlink messages. . The userspace libdlm API has allowed the DLM_LKF_TIMEOUT flag with a timeout value to be set in lock requests. The lock request would be cancelled after the timeout. Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com> 2022-06-22 21:45:22 +03:00			`config DLM_DEPRECATED_API`
			`bool "DLM deprecated API"`
			`depends on DLM`
			`help`
			`Enables deprecated DLM timeout features that will be removed in`
			`later Linux kernel releases.`

			`If you are unsure, say N.`

[DLM] The core of the DLM for GFS2/CLVM This is the core of the distributed lock manager which is required to use GFS2 as a cluster filesystem. It is also used by CLVM and can be used as a standalone lock manager independantly of either of these two projects. It implements VAX-style locking modes. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steve Whitehouse <swhiteho@redhat.com> 2006-01-18 12:30:29 +03:00			`config DLM_DEBUG`
			`bool "DLM debugging"`
			`depends on DLM`
			`help`
[DLM] Consolidate transport protocols This patch consolidates the TCP & SCTP protocols for the DLM into a single file and makes it switchable at run-time (well, at least before the DLM actually starts up!) For RHEL5 this patch requires Neil Horman's patch that expands the in-kernel socket API but that has already been twice ACKed so it should be OK. The patch adds a new lowcomms.c file that replaces the existing lowcomms-sctp.c & lowcomms-tcp.c files. Signed-off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> 2007-04-17 18:39:57 +04:00			`Under the debugfs mount point, the name of each lockspace will`
			`appear as a file in the "dlm" directory. The output is the`
			`list of resource and locks the local node knows about.`