fs: dlm: fix F_CANCELLK to cancel pending request

This patch fixes the current handling of F_CANCELLK by not just doing a
unlock as we need to try to cancel a lock at first. A unlock makes sense
on

fs: dlm: fix F_CANCELLK to cancel pending request

This patch fixes the current handling of F_CANCELLK by not just doing a
unlock as we need to try to cancel a lock at first. A unlock makes sense
on a non-blocking lock request but if it's a blocking lock request we
need to cancel the request until it's not granted yet. This patch is fixing
this behaviour by first try to cancel a lock request and if it's failed
it's unlocking the lock which seems to be granted.

Note: currently the nfs locking handling was disabled by commit
40595cdc93ed ("nfs: block notification on fs with its own ->lock").
However DLM was never being updated regarding to this change. Future
patches will try to fix lockd lock requests for DLM. This patch is
currently assuming the upstream DLM lockd handling is correct.

Signed-off-by: Alexander Aring <[email protected]>
Signed-off-by: David Teigland <[email protected]>

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

Based on 1 normalized pattern(s):

this copyrighted material is made available to anyone wishing to use
modify copy or redistri

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

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 <[email protected]>
Reviewed-by: Richard Fontana <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Steve Winslow <[email protected]>
Reviewed-by: Alexios Zavras <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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UAPI: (Scripted) Disintegrate include/linux

Signed-off-by: David Howells <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Acked-by: Michae

UAPI: (Scripted) Disintegrate include/linux

Signed-off-by: David Howells <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Acked-by: Michael Kerrisk <[email protected]>
Acked-by: Paul E. McKenney <[email protected]>
Acked-by: Dave Jones <[email protected]>

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dlm: make plock operation killable

Allow processes blocked on plock requests to be interrupted
when they are killed. This leaves the problem of cleaning
up the lock state in userspace. This has th

dlm: make plock operation killable

Allow processes blocked on plock requests to be interrupted
when they are killed. This leaves the problem of cleaning
up the lock state in userspace. This has three parts:

1. Add a flag to unlock operations sent to userspace
indicating the file is being closed. Userspace will
then look for and clear any waiting plock operations that
were abandoned by an interrupted process.

2. Queue an unlock-close operation (like in 1) to clean up
userspace from an interrupted plock request. This is needed
because the vfs will not send a cleanup-unlock if it sees no
locks on the file, which it won't if the interrupted operation
was the only one.

3. Do not use replies from userspace for unlock-close operations
because they are unnecessary (they are just cleaning up for the
process which did not make an unlock call). This also simplifies
the new unlock-close generated from point 2.

Signed-off-by: David Teigland <[email protected]>

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headers_check fix: linux/dlm_plock.h

fix the following 'make headers_check' warning:

usr/include/linux/dlm_plock.h:25: found __[us]{8,16,32,64} type without #include <linux/types.h>

Signed-off-b

headers_check fix: linux/dlm_plock.h

fix the following 'make headers_check' warning:

usr/include/linux/dlm_plock.h:25: found __[us]{8,16,32,64} type without #include <linux/types.h>

Signed-off-by: Jaswinder Singh Rajput <[email protected]>

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dlm: move plock code from gfs2

Move the code that handles cluster posix locks from gfs2 into the dlm
so that it can be used by both gfs2 and ocfs2.

Signed-off-by: David Teigland <[email protected]

dlm: move plock code from gfs2

Move the code that handles cluster posix locks from gfs2 into the dlm
so that it can be used by both gfs2 and ocfs2.

Signed-off-by: David Teigland <[email protected]>

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