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Commit e5a0334c authored by Sunil Mushran's avatar Sunil Mushran Committed by Mark Fasheh
Browse files

ocfs2/dlm: Move dlm_print_one_mle() from dlmmaster.c to dlmdebug.c 



This patch helps in consolidating debugging related functions in dlmdebug.c.

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 7209300a

fs/ocfs2/dlm/dlmdebug.c

+82 −72
Original line number Diff line number Diff line
@@ -268,11 +268,6 @@ const char *dlm_errname(enum dlm_status err) 
}

EXPORT_SYMBOL_GPL(dlm_errname);





#ifdef CONFIG_DEBUG_FS



static struct dentry *dlm_debugfs_root = NULL;



/* NOTE: This function converts a lockname into a string. It uses knowledge

 * of the format of the lockname that should be outside the purview of the dlm.

 * We are adding only to make dlm debugging slightly easier.
@@ -299,6 +294,88 @@ static int stringify_lockname(const char *lockname, int locklen, 
	return out;

}



static int stringify_nodemap(unsigned long *nodemap, int maxnodes,

			     char *buf, int len)

{

	int out = 0;

	int i = -1;



	while ((i = find_next_bit(nodemap, maxnodes, i + 1)) < maxnodes)

		out += snprintf(buf + out, len - out, "%d ", i);



	return out;

}



static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len)

{

	int out = 0;

	unsigned int namelen;

	const char *name;

	char *mle_type;



	if (mle->type != DLM_MLE_MASTER) {

		namelen = mle->u.name.len;

		name = mle->u.name.name;

	} else {

		namelen = mle->u.res->lockname.len;

		name = mle->u.res->lockname.name;

	}



	if (mle->type == DLM_MLE_BLOCK)

		mle_type = "BLK";

	else if (mle->type == DLM_MLE_MASTER)

		mle_type = "MAS";

	else

		mle_type = "MIG";



	out += stringify_lockname(name, namelen, buf + out, len - out);

	out += snprintf(buf + out, len - out,

			"\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n",

			mle_type, mle->master, mle->new_master,

			!list_empty(&mle->hb_events),

			!!mle->inuse,

			atomic_read(&mle->mle_refs.refcount));



	out += snprintf(buf + out, len - out, "Maybe=");

	out += stringify_nodemap(mle->maybe_map, O2NM_MAX_NODES,

				 buf + out, len - out);

	out += snprintf(buf + out, len - out, "\n");



	out += snprintf(buf + out, len - out, "Vote=");

	out += stringify_nodemap(mle->vote_map, O2NM_MAX_NODES,

				 buf + out, len - out);

	out += snprintf(buf + out, len - out, "\n");



	out += snprintf(buf + out, len - out, "Response=");

	out += stringify_nodemap(mle->response_map, O2NM_MAX_NODES,

				 buf + out, len - out);

	out += snprintf(buf + out, len - out, "\n");



	out += snprintf(buf + out, len - out, "Node=");

	out += stringify_nodemap(mle->node_map, O2NM_MAX_NODES,

				 buf + out, len - out);

	out += snprintf(buf + out, len - out, "\n");



	out += snprintf(buf + out, len - out, "\n");



	return out;

}



void dlm_print_one_mle(struct dlm_master_list_entry *mle)

{

	char *buf;



	buf = (char *) get_zeroed_page(GFP_NOFS);

	if (buf) {

		dump_mle(mle, buf, PAGE_SIZE - 1);

		free_page((unsigned long)buf);

	}

}



#ifdef CONFIG_DEBUG_FS



static struct dentry *dlm_debugfs_root = NULL;



#define DLM_DEBUGFS_DIR				"o2dlm"

#define DLM_DEBUGFS_DLM_STATE			"dlm_state"

#define DLM_DEBUGFS_LOCKING_STATE		"locking_state"
@@ -326,18 +403,6 @@ static void dlm_debug_get(struct dlm_debug_ctxt *dc) 
	kref_get(&dc->debug_refcnt);

}



static int stringify_nodemap(unsigned long *nodemap, int maxnodes,

			     char *buf, int len)

{

	int out = 0;

	int i = -1;



	while ((i = find_next_bit(nodemap, maxnodes, i + 1)) < maxnodes)

		out += snprintf(buf + out, len - out, "%d ", i);



	return out;

}



static struct debug_buffer *debug_buffer_allocate(void)

{

	struct debug_buffer *db = NULL;
@@ -455,61 +520,6 @@ static struct file_operations debug_purgelist_fops = { 
/* end - purge list funcs */



/* begin - debug mle funcs */

static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len)

{

	int out = 0;

	unsigned int namelen;

	const char *name;

	char *mle_type;



	if (mle->type != DLM_MLE_MASTER) {

		namelen = mle->u.name.len;

		name = mle->u.name.name;

	} else {

		namelen = mle->u.res->lockname.len;

		name = mle->u.res->lockname.name;

	}



	if (mle->type == DLM_MLE_BLOCK)

		mle_type = "BLK";

	else if (mle->type == DLM_MLE_MASTER)

		mle_type = "MAS";

	else

		mle_type = "MIG";



	out += stringify_lockname(name, namelen, buf + out, len - out);

	out += snprintf(buf + out, len - out,

			"\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n",

			mle_type, mle->master, mle->new_master,

			!list_empty(&mle->hb_events),

			!!mle->inuse,

			atomic_read(&mle->mle_refs.refcount));



	out += snprintf(buf + out, len - out, "Maybe=");

	out += stringify_nodemap(mle->maybe_map, O2NM_MAX_NODES,

				 buf + out, len - out);

	out += snprintf(buf + out, len - out, "\n");



	out += snprintf(buf + out, len - out, "Vote=");

	out += stringify_nodemap(mle->vote_map, O2NM_MAX_NODES,

				 buf + out, len - out);

	out += snprintf(buf + out, len - out, "\n");



	out += snprintf(buf + out, len - out, "Response=");

	out += stringify_nodemap(mle->response_map, O2NM_MAX_NODES,

				 buf + out, len - out);

	out += snprintf(buf + out, len - out, "\n");



	out += snprintf(buf + out, len - out, "Node=");

	out += stringify_nodemap(mle->node_map, O2NM_MAX_NODES,

				 buf + out, len - out);

	out += snprintf(buf + out, len - out, "\n");



	out += snprintf(buf + out, len - out, "\n");



	return out;

}



static int debug_mle_print(struct dlm_ctxt *dlm, struct debug_buffer *db)

{

	struct dlm_master_list_entry *mle;

fs/ocfs2/dlm/dlmdebug.h

+2 −0
Original line number Diff line number Diff line
@@ -25,6 +25,8 @@ 
#ifndef DLMDEBUG_H

#define DLMDEBUG_H



void dlm_print_one_mle(struct dlm_master_list_entry *mle);



#ifdef CONFIG_DEBUG_FS



struct dlm_debug_ctxt {

fs/ocfs2/dlm/dlmmaster.c

+1 −88
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ 
#include "dlmapi.h"

#include "dlmcommon.h"

#include "dlmdomain.h"

#include "dlmdebug.h"



#define MLOG_MASK_PREFIX (ML_DLM|ML_DLM_MASTER)

#include "cluster/masklog.h"
@@ -91,94 +92,6 @@ static inline int dlm_mle_equal(struct dlm_ctxt *dlm, 
	return 1;

}



#define dlm_print_nodemap(m)  _dlm_print_nodemap(m,#m)

static void _dlm_print_nodemap(unsigned long *map, const char *mapname)

{

	int i;

	printk("%s=[ ", mapname);

	for (i=0; i<O2NM_MAX_NODES; i++)

		if (test_bit(i, map))

			printk("%d ", i);

	printk("]");

}



static void dlm_print_one_mle(struct dlm_master_list_entry *mle)

{

	int refs;

	char *type;

	char attached;

	u8 master;

	unsigned int namelen;

	const char *name;

	struct kref *k;

	unsigned long *maybe = mle->maybe_map,

		      *vote = mle->vote_map,

		      *resp = mle->response_map,

		      *node = mle->node_map;



	k = &mle->mle_refs;

	if (mle->type == DLM_MLE_BLOCK)

		type = "BLK";

	else if (mle->type == DLM_MLE_MASTER)

		type = "MAS";

	else

		type = "MIG";

	refs = atomic_read(&k->refcount);

	master = mle->master;

	attached = (list_empty(&mle->hb_events) ? 'N' : 'Y');



	if (mle->type != DLM_MLE_MASTER) {

		namelen = mle->u.name.len;

		name = mle->u.name.name;

	} else {

		namelen = mle->u.res->lockname.len;

		name = mle->u.res->lockname.name;

	}



	mlog(ML_NOTICE, "%.*s: %3s refs=%3d mas=%3u new=%3u evt=%c inuse=%d ",

		  namelen, name, type, refs, master, mle->new_master, attached,

		  mle->inuse);

	dlm_print_nodemap(maybe);

	printk(", ");

	dlm_print_nodemap(vote);

	printk(", ");

	dlm_print_nodemap(resp);

	printk(", ");

	dlm_print_nodemap(node);

	printk(", ");

	printk("\n");

}



#if 0

/* Code here is included but defined out as it aids debugging */



static void dlm_dump_mles(struct dlm_ctxt *dlm)

{

	struct dlm_master_list_entry *mle;

	

	mlog(ML_NOTICE, "dumping all mles for domain %s:\n", dlm->name);

	spin_lock(&dlm->master_lock);

	list_for_each_entry(mle, &dlm->master_list, list)

		dlm_print_one_mle(mle);

	spin_unlock(&dlm->master_lock);

}



int dlm_dump_all_mles(const char __user *data, unsigned int len)

{

	struct dlm_ctxt *dlm;



	spin_lock(&dlm_domain_lock);

	list_for_each_entry(dlm, &dlm_domains, list) {

		mlog(ML_NOTICE, "found dlm: %p, name=%s\n", dlm, dlm->name);

		dlm_dump_mles(dlm);

	}

	spin_unlock(&dlm_domain_lock);

	return len;

}

EXPORT_SYMBOL_GPL(dlm_dump_all_mles);



#endif  /*  0  */



static struct kmem_cache *dlm_lockres_cache = NULL;

static struct kmem_cache *dlm_lockname_cache = NULL;

static struct kmem_cache *dlm_mle_cache = NULL;