path: root/fs/ocfs2/dlm/dlmdebug.c

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * dlmdebug.c
 *
 * debug functionality for the dlm
 *
 * Copyright (C) 2004, 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.
 *
 */

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/utsname.h>
#include <linux/sysctl.h>
#include <linux/spinlock.h>
#include <linux/debugfs.h>

#include "cluster/heartbeat.h"
#include "cluster/nodemanager.h"
#include "cluster/tcp.h"

#include "dlmapi.h"
#include "dlmcommon.h"
#include "dlmdomain.h"
#include "dlmdebug.h"

#define MLOG_MASK_PREFIX ML_DLM
#include "cluster/masklog.h"

static int stringify_lockname(const char *lockname, int locklen, char *buf,
			      int len);

void dlm_print_one_lock_resource(struct dlm_lock_resource *res)
{
	spin_lock(&res->spinlock);
	__dlm_print_one_lock_resource(res);
	spin_unlock(&res->spinlock);
}

static void dlm_print_lockres_refmap(struct dlm_lock_resource *res)
{
	int bit;
	assert_spin_locked(&res->spinlock);

	printk("  refmap nodes: [ ");
	bit = 0;
	while (1) {
		bit = find_next_bit(res->refmap, O2NM_MAX_NODES, bit);
		if (bit >= O2NM_MAX_NODES)
			break;
		printk("%u ", bit);
		bit++;
	}
	printk("], inflight=%u\n", res->inflight_locks);
}

static void __dlm_print_lock(struct dlm_lock *lock)
{
	spin_lock(&lock->spinlock);

	printk("    type=%d, conv=%d, node=%u, cookie=%u:%llu, "
	       "ref=%u, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c), "
	       "pending=(conv=%c,lock=%c,cancel=%c,unlock=%c)\n",
	       lock->ml.type, lock->ml.convert_type, lock->ml.node,
	       dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
	       dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
	       atomic_read(&lock->lock_refs.refcount),
	       (list_empty(&lock->ast_list) ? 'y' : 'n'),
	       (lock->ast_pending ? 'y' : 'n'),
	       (list_empty(&lock->bast_list) ? 'y' : 'n'),
	       (lock->bast_pending ? 'y' : 'n'),
	       (lock->convert_pending ? 'y' : 'n'),
	       (lock->lock_pending ? 'y' : 'n'),
	       (lock->cancel_pending ? 'y' : 'n'),
	       (lock->unlock_pending ? 'y' : 'n'));

	spin_unlock(&lock->spinlock);
}

void __dlm_print_one_lock_resource(struct dlm_lock_resource *res)
{
	struct list_head *iter2;
	struct dlm_lock *lock;
	char buf[DLM_LOCKID_NAME_MAX];

	assert_spin_locked(&res->spinlock);

	stringify_lockname(res->lockname.name, res->lockname.len,
			   buf, sizeof(buf) - 1);
	printk("lockres: %s, owner=%u, state=%u\n",
	       buf, res->owner, res->state);
	printk("  last used: %lu, refcnt: %u, on purge list: %s\n",
	       res->last_used, atomic_read(&res->refs.refcount),
	       list_empty(&res->purge) ? "no" : "yes");
	printk("  on dirty list: %s, on reco list: %s, "
	       "migrating pending: %s\n",
	       list_empty(&res->dirty) ? "no" : "yes",
	       list_empty(&res->recovering) ? "no" : "yes",
	       res->migration_pending ? "yes" : "no");
	printk("  inflight locks: %d, asts reserved: %d\n",
	       res->inflight_locks, atomic_read(&res->asts_reserved));
	dlm_print_lockres_refmap(res);
	printk("  granted queue:\n");
	list_for_each(iter2, &res->granted) {
		lock = list_entry(iter2, struct dlm_lock, list);
		__dlm_print_lock(lock);
	}
	printk("  converting queue:\n");
	list_for_each(iter2, &res->converting) {
		lock = list_entry(iter2, struct