Commit 6325b4a2 authored by Sunil Mushran's avatar Sunil Mushran Committed by Mark Fasheh

ocfs2/dlm: Create debugfs dirs

This patch creates the debugfs directories that will hold the
files to be used to dump the dlm state.
Signed-off-by: default avatarSunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
Signed-off-by: default avatarMark Fasheh <mfasheh@suse.com>
parent 29576f8b
......@@ -123,6 +123,8 @@ struct dlm_ctxt
atomic_t remote_resources;
atomic_t unknown_resources;
struct dentry *dlm_debugfs_subroot;
/* NOTE: Next three are protected by dlm_domain_lock */
struct kref dlm_refs;
enum dlm_ctxt_state dlm_state;
......
......@@ -30,6 +30,7 @@
#include <linux/utsname.h>
#include <linux/sysctl.h>
#include <linux/spinlock.h>
#include <linux/debugfs.h>
#include "cluster/heartbeat.h"
#include "cluster/nodemanager.h"
......@@ -37,8 +38,8 @@
#include "dlmapi.h"
#include "dlmcommon.h"
#include "dlmdomain.h"
#include "dlmdebug.h"
#define MLOG_MASK_PREFIX ML_DLM
#include "cluster/masklog.h"
......@@ -266,3 +267,50 @@ const char *dlm_errname(enum dlm_status err)
return dlm_errnames[err];
}
EXPORT_SYMBOL_GPL(dlm_errname);
#ifdef CONFIG_DEBUG_FS
static struct dentry *dlm_debugfs_root = NULL;
#define DLM_DEBUGFS_DIR "o2dlm"
/* subroot - domain dir */
int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm)
{
dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name,
dlm_debugfs_root);
if (!dlm->dlm_debugfs_subroot) {
mlog_errno(-ENOMEM);
goto bail;
}
return 0;
bail:
dlm_destroy_debugfs_subroot(dlm);
return -ENOMEM;
}
void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm)
{
if (dlm->dlm_debugfs_subroot)
debugfs_remove(dlm->dlm_debugfs_subroot);
}
/* debugfs root */
int dlm_create_debugfs_root(void)
{
dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL);
if (!dlm_debugfs_root) {
mlog_errno(-ENOMEM);
return -ENOMEM;
}
return 0;
}
void dlm_destroy_debugfs_root(void)
{
if (dlm_debugfs_root)
debugfs_remove(dlm_debugfs_root);
}
#endif /* CONFIG_DEBUG_FS */
/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* dlmdebug.h
*
* Copyright (C) 2008 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*
*/
#ifndef DLMDEBUG_H
#define DLMDEBUG_H
#ifdef CONFIG_DEBUG_FS
int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm);
void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm);
int dlm_create_debugfs_root(void);
void dlm_destroy_debugfs_root(void);
#else
static int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm)
{
return 0;
}
static void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm)
{
}
static int dlm_create_debugfs_root(void)
{
return 0;
}
static void dlm_destroy_debugfs_root(void)
{
}
#endif /* CONFIG_DEBUG_FS */
#endif /* DLMDEBUG_H */
......@@ -33,6 +33,7 @@
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/debugfs.h>
#include "cluster/heartbeat.h"
#include "cluster/nodemanager.h"
......@@ -40,8 +41,8 @@
#include "dlmapi.h"
#include "dlmcommon.h"
#include "dlmdomain.h"
#include "dlmdebug.h"
#include "dlmver.h"
......@@ -298,6 +299,8 @@ static int dlm_wait_on_domain_helper(const char *domain)
static void dlm_free_ctxt_mem(struct dlm_ctxt *dlm)
{
dlm_destroy_debugfs_subroot(dlm);
if (dlm->lockres_hash)
dlm_free_pagevec((void **)dlm->lockres_hash, DLM_HASH_PAGES);
......@@ -1494,6 +1497,7 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
u32 key)
{
int i;
int ret;
struct dlm_ctxt *dlm = NULL;
dlm = kzalloc(sizeof(*dlm), GFP_KERNEL);
......@@ -1526,6 +1530,15 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
dlm->key = key;
dlm->node_num = o2nm_this_node();
ret = dlm_create_debugfs_subroot(dlm);
if (ret < 0) {
dlm_free_pagevec((void **)dlm->lockres_hash, DLM_HASH_PAGES);
kfree(dlm->name);
kfree(dlm);
dlm = NULL;
goto leave;
}
spin_lock_init(&dlm->spinlock);
spin_lock_init(&dlm->master_lock);
spin_lock_init(&dlm->ast_lock);
......@@ -1851,8 +1864,13 @@ static int __init dlm_init(void)
goto error;
}
status = dlm_create_debugfs_root();
if (status)
goto error;
return 0;
error:
dlm_unregister_net_handlers();
dlm_destroy_lock_cache();
dlm_destroy_master_caches();
dlm_destroy_mle_cache();
......@@ -1861,6 +1879,7 @@ static int __init dlm_init(void)
static void __exit dlm_exit (void)
{
dlm_destroy_debugfs_root();
dlm_unregister_net_handlers();
dlm_destroy_lock_cache();
dlm_destroy_master_caches();
......
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