linux-stable.git/fs/dlm/debug_fs.c, branch v5.16

fs: dlm: add midcomms debugfs functionality

2021-05-25T14:22:20+00:00

This patch adds functionality to debug midcomms per connection state
inside a comms directory which is similar like dlm configfs. Currently
there exists the possibility to read out two attributes which is the
send queue counter and the version of each midcomms node state.

Signed-off-by: Alexander Aring 
Signed-off-by: David Teigland

fs: dlm: fix debugfs dump

2021-03-09T14:56:42+00:00

This patch fixes the following message which randomly pops up during
glocktop call:

seq_file: buggy .next function table_seq_next did not update position index

The issue is that seq_read_iter() in fs/seq_file.c also needs an
increment of the index in an non next record case as well which this
patch fixes otherwise seq_read_iter() will print out the above message.

Signed-off-by: Alexander Aring 
Signed-off-by: David Teigland

dlm: no need to check return value of debugfs_create functions

2019-07-11T16:01:58+00:00

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Signed-off-by: Greg Kroah-Hartman 
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: Improve a size determination in table_seq_start()

2017-08-07T16:23:09+00:00

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

Signed-off-by: Markus Elfring 
Signed-off-by: David Teigland

dlm: Add spaces for better code readability

2017-08-07T16:23:09+00:00

The script "checkpatch.pl" pointed information out like the following.

CHECK: spaces preferred around that '+' (ctx:VxV)

Thus fix the affected source code places.

Signed-off-by: Markus Elfring 
Signed-off-by: David Teigland

dlm: Replace six seq_puts() calls by seq_putc()

2017-08-07T16:23:09+00:00

Six single characters (line breaks) should be put into a sequence.
Thus use the corresponding function "seq_putc".

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring 
Signed-off-by: David Teigland

dlm: audit and remove any unnecessary uses of module.h

2016-10-19T16:00:03+00:00

Historically a lot of these existed because we did not have
a distinction between what was modular code and what was providing
support to modules via EXPORT_SYMBOL and friends.  That changed
when we forked out support for the latter into the export.h file.
This means we should be able to reduce the usage of module.h
in code that is obj-y Makefile or bool Kconfig.

In the case of some code where it is modular, we can extend that to
also include files that are building basic support functionality but
not related to loading or registering the final module; such files
also have no need whatsoever for module.h

The advantage in removing such instances is that module.h itself
sources about 15 other headers; adding significantly to what we feed
cpp, and it can obscure what headers we are effectively using.

Since module.h might have been the implicit source for init.h
(for __init) and for export.h (for EXPORT_SYMBOL) we consider each
instance for the presence of either and replace as needed.

In the dlm case, we remove module.h from a global header and only
introduce it in the files where it is explicitly required, since
there is nothing modular in dlm_internal.h itself.

Signed-off-by: Paul Gortmaker 
Signed-off-by: David Teigland

dlm: fix malfunction of dlm_tool caused by debugfs changes

2016-08-26T18:22:14+00:00

With the current kernel, `dlm_tool lockdebug` fails as below:

"dlm_tool lockdebug ED0BD86DCE724393918A1AE8FDBF1EE3
can't open /sys/kernel/debug/dlm/ED0BD86DCE724393918A1AE8FDBF1EE3:
Operation not permitted"

This is because table_open() depends on file->f_op to tell which
seq_file ops should be passed down. But, the original file ops in
file->f_op is replaced by "debugfs_full_proxy_file_operations" with
commit 49d200deaa68 ("debugfs: prevent access to removed files'
private data").

Currently, I can think up 2 solutions: 1st, replace
debugfs_create_file() with debugfs_create_file_unsafe();
2nd, make different table_open#() accordingly. The 1st one
is neat, but I don't thoroughly understand its risk. Maybe
someone has a better one.

Signed-off-by: Eric Ren 
Signed-off-by: David Teigland

dlm: Use seq_puts() instead of seq_printf() for constant strings

2014-11-05T19:13:09+00:00

Convert the seq_printf output with constant strings to seq_puts.

Link: http://lkml.kernel.org/p/b416b016f4a6e49115ba736cad6ea2709a8bc1c4.1412031505.git.joe@perches.com

Cc: Christine Caulfield 
Cc: David Teigland 
Cc: cluster-devel@redhat.com
Signed-off-by: Joe Perches 
Signed-off-by: Steven Rostedt