kernel/linux.git/fs/dlm/lock.h, branch linux-6.0.y

fs: dlm: don't use deprecated timeout features by default

2022-08-01T14:31:38+00:00

This patch will disable use of deprecated timeout features if CONFIG_DLM_DEPRECATED_API is not set. The deprecated features will be removed in upcoming kernel release v6.2. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: remove timeout from dlm_user_adopt_orphan

2022-06-24T16:57:53+00:00

Remove the unused timeout parameter from dlm_user_adopt_orphan(). Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: remove waiter warnings

2022-06-24T16:57:52+00:00

This patch removes warning messages that could be logged when remote requests had been waiting on a reply message for some timeout period (which could be set through configfs, but was rarely enabled.) The improved midcomms layer now carefully tracks all messages and replies, and logs much more useful messages if there is an actual problem. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: add lkb waiters debugfs functionality

2021-11-02T19:39:20+00:00

This patch adds functionality to put a lkb to the waiters state. It can be useful to combine this feature with the "rawmsg" debugfs functionality. It will bring the DLM lkb into a state that a message will be parsed by the kernel. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: add lkb debugfs functionality

2021-11-02T19:39:20+00:00

This patch adds functionality to add an lkb during runtime. This is a highly debugging feature only, wrong input can crash the kernel. It is a early state feature as well. The goal is to provide a user interface for manipulate dlm state and combine it with the rawmsg feature. It is debugfs functionality, we don't care about UAPI breakage. Even it's possible to add lkb's/rsb's which could never be exists in such wat by using normal DLM operation. The user of this interface always need to think before using this feature, not every crash which happens can really occur during normal dlm operation. Future there should be more functionality to add a more realistic lkb which reflects normal DLM state inside the kernel. For now this is enough. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 193

2019-05-30T18:29:21+00:00

Based on 1 normalized pattern(s): this copyrighted material is made available to anyone wishing to use modify copy or redistribute it subject to the terms and conditions of the gnu general public license v 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 45 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Richard Fontana Reviewed-by: Allison Randal Reviewed-by: Steve Winslow Reviewed-by: Alexios Zavras Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170027.342746075@linutronix.de Signed-off-by: Greg Kroah-Hartman

dlm: adopt orphan locks

2014-11-19T20:48:02+00:00

A process may exit, leaving an orphan lock in the lockspace. This adds the capability for another process to acquire the orphan lock. Acquiring the orphan just moves the lock from the orphan list onto the acquiring process's list of locks. An adopting process must specify the resource name and mode of the lock it wants to adopt. If a matching lock is found, the lock is moved to the caller's 's list of locks, and the lkid of the lock is returned like the lkid of a new lock. If an orphan with a different mode is found, then -EAGAIN is returned. If no orphan lock is found on the resource, then -ENOENT is returned. No async completion is used because the result is immediately available. Also, when orphans are purged, allow a zero nodeid to refer to the local nodeid so the caller does not need to look up the local nodeid. Signed-off-by: David Teigland

dlm: use rsbtbl as resource directory

2012-07-16T19:16:19+00:00

Remove the dir hash table (dirtbl), and use the rsb hash table (rsbtbl) as the resource directory. It has always been an unnecessary duplication of information. This improves efficiency by using a single rsbtbl lookup in many cases where both rsbtbl and dirtbl lookups were needed previously. This eliminates the need to handle cases of rsbtbl and dirtbl being out of sync. In many cases there will be memory savings because the dir hash table no longer exists. Signed-off-by: David Teigland

dlm: fixes for nodir mode

2012-05-02T19:15:27+00:00

The "nodir" mode (statically assign master nodes instead of using the resource directory) has always been highly experimental, and never seriously used. This commit fixes a number of problems, making nodir much more usable. - Major change to recovery: recover all locks and restart all in-progress operations after recovery. In some cases it's not possible to know which in-progess locks to recover, so recover all. (Most require recovery in nodir mode anyway since rehashing changes most master nodes.) - Change the way nodir mode is enabled, from a command line mount arg passed through gfs2, into a sysfs file managed by dlm_controld, consistent with the other config settings. - Allow recovering MSTCPY locks on an rsb that has not yet been turned into a master copy. - Ignore RCOM_LOCK and RCOM_LOCK_REPLY recovery messages from a previous, aborted recovery cycle. Base this on the local recovery status not being in the state where any nodes should be sending LOCK messages for the current recovery cycle. - Hold rsb lock around dlm_purge_mstcpy_locks() because it may run concurrently with dlm_recover_master_copy(). - Maintain highbast on process-copy lkb's (in addition to the master as is usual), because the lkb can switch back and forth between being a master and being a process copy as the master node changes in recovery. - When recovering MSTCPY locks, flag rsb's that have non-empty convert or waiting queues for granting at the end of recovery. (Rename flag from LOCKS_PURGED to RECOVER_GRANT and similar for the recovery function, because it's not only resources with purged locks that need grant a grant attempt.) - Replace a couple of unnecessary assertion panics with error messages. Signed-off-by: David Teigland

dlm: improve error and debug messages

2012-04-26T20:41:46+00:00

Change some existing error/debug messages to collect more useful information, and add some new error/debug messages to address recently found problems. Signed-off-by: David Teigland