ocfs2: Remove mount/unmount votes

The node maps that are set/unset by these votes are no longer relevant, thus
we can remove the mount and umount votes. Since those are the last two
remaining votes, we can also remove the entire vote infrastructure.

The vote thread has been renamed to the downconvert thread, and the small
amount of functionality related to managing it has been moved into
fs/ocfs2/dlmglue.c. All references to votes have been removed or updated.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 0 insertions, 756 deletions

diff --git a/fs/ocfs2/vote.c b/fs/ocfs2/vote.c
deleted file mode 100644
index c05358538f2..00000000000
--- a/fs/ocfs2/vote.c
+++ /dev/null
@@ -1,756 +0,0 @@
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * vote.c
- *
- * description here
- *
- * Copyright (C) 2003, 2004 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/kthread.h>
-
-#include <cluster/heartbeat.h>
-#include <cluster/nodemanager.h>
-#include <cluster/tcp.h>
-
-#include <dlm/dlmapi.h>
-
-#define MLOG_MASK_PREFIX ML_VOTE
-#include <cluster/masklog.h>
-
-#include "ocfs2.h"
-
-#include "alloc.h"
-#include "dlmglue.h"
-#include "extent_map.h"
-#include "heartbeat.h"
-#include "inode.h"
-#include "journal.h"
-#include "slot_map.h"
-#include "vote.h"
-
-#include "buffer_head_io.h"
-
-#define OCFS2_MESSAGE_TYPE_VOTE     (0x1)
-#define OCFS2_MESSAGE_TYPE_RESPONSE (0x2)
-struct ocfs2_msg_hdr
-{
-	__be32 h_response_id; /* used to lookup message handle on sending
-			    * node. */
-	__be32 h_request;
-	__be64 h_blkno;
-	__be32 h_generation;
-	__be32 h_node_num;    /* node sending this particular message. */
-};
-
-struct ocfs2_vote_msg
-{
-	struct ocfs2_msg_hdr v_hdr;
-	__be32 v_reserved1;
-} __attribute__ ((packed));
-
-/* Responses are given these values to maintain backwards
- * compatibility with older ocfs2 versions */
-#define OCFS2_RESPONSE_OK		(0)
-#define OCFS2_RESPONSE_BUSY		(-16)
-#define OCFS2_RESPONSE_BAD_MSG		(-22)
-
-struct ocfs2_response_msg
-{
-	struct ocfs2_msg_hdr r_hdr;
-	__be32 r_response;
-} __attribute__ ((packed));
-
-struct ocfs2_vote_work {
-	struct list_head   w_list;
-	struct ocfs2_vote_msg w_msg;
-};
-
-enum ocfs2_vote_request {
-	OCFS2_VOTE_REQ_INVALID = 0,
-	OCFS2_VOTE_REQ_MOUNT,
-	OCFS2_VOTE_REQ_UMOUNT,
-	OCFS2_VOTE_REQ_LAST
-};
-
-static inline int ocfs2_is_valid_vote_request(int request)
-{
-	return OCFS2_VOTE_REQ_INVALID < request &&
-		request < OCFS2_VOTE_REQ_LAST;
-}
-
-typedef void (*ocfs2_net_response_callback)(void *priv,
-					    struct ocfs2_response_msg *resp);
-struct ocfs2_net_response_cb {
-	ocfs2_net_response_callback	rc_cb;
-	void				*rc_priv;
-};
-
-struct ocfs2_net_wait_ctxt {
-	struct list_head        n_list;
-	u32                     n_response_id;
-	wait_queue_head_t       n_event;
-	struct ocfs2_node_map   n_node_map;
-	int                     n_response; /* an agreggate response. 0 if
-					     * all nodes are go, < 0 on any
-					     * negative response from any
-					     * node or network error. */
-	struct ocfs2_net_response_cb *n_callback;
-};
-
-static void ocfs2_process_mount_request(struct ocfs2_super *osb,
-					unsigned int node_num)
-{
-	mlog(0, "MOUNT vote from node %u\n", node_num);
-	/* The other node only sends us this message when he has an EX
-	 * on the superblock, so our recovery threads (if having been
-	 * launched) are waiting on it.*/
-	ocfs2_recovery_map_clear(osb, node_num);
-	ocfs2_node_map_set_bit(osb, &osb->mounted_map, node_num);
-
-	/* We clear the umount map here because a node may have been
-	 * previously mounted, safely unmounted but never stopped
-	 * heartbeating - in which case we'd have a stale entry. */
-	ocfs2_node_map_clear_bit(osb, &osb->umount_map, node_num);
-}
-
-static void ocfs2_process_umount_request(struct ocfs2_super *osb,
-					 unsigned int node_num)
-{
-	mlog(0, "UMOUNT vote from node %u\n", node_num);
-	ocfs2_node_map_clear_bit(osb, &osb->mounted_map, node_num);
-	ocfs2_node_map_set_bit(osb, &osb->umount_map, node_num);
-}
-
-static void ocfs2_process_vote(struct ocfs2_super *osb,
-			       struct ocfs2_vote_msg *msg)
-{
-	int net_status, vote_response;
-	unsigned int node_num;
-	u64 blkno;
-	enum ocfs2_vote_request request;
-	struct ocfs2_msg_hdr *hdr = &msg->v_hdr;
-	struct ocfs2_response_msg response;
-
-	/* decode the network mumbo jumbo into local variables. */
-	request = be32_to_cpu(hdr->h_request);
-	blkno = be64_to_cpu(hdr->h_blkno);
-	node_num = be32_to_cpu(hdr->h_node_num);
-
-	mlog(0, "processing vote: request = %u, blkno = %llu, node_num = %u\n",
-	     request, (unsigned long long)blkno, node_num);
-
-	if (!ocfs2_is_valid_vote_request(request)) {
-		mlog(ML_ERROR, "Invalid vote request %d from node %u\n",
-		     request, node_num);
-		vote_response = OCFS2_RESPONSE_BAD_MSG;
-		goto respond;
-	}
-
-	vote_response = OCFS2_RESPONSE_OK;
-
-	switch (request) {
-	case OCFS2_VOTE_REQ_UMOUNT:
-		ocfs2_process_umount_request(osb, node_num);
-		goto respond;
-	case OCFS2_VOTE_REQ_MOUNT:
-		ocfs2_process_mount_request(osb, node_num);
-		goto respond;
-	default:
-		/* avoids a gcc warning */
-		break;
-	}
-
-respond:
-	/* Response struture is small so we just put it on the stack
-	 * and stuff it inline. */
-	memset(&response, 0, sizeof(struct ocfs2_response_msg));
-	response.r_hdr.h_response_id = hdr->h_response_id;
-	response.r_hdr.h_blkno = hdr->h_blkno;
-	response.r_hdr.h_generation = hdr->h_generation;
-	response.r_hdr.h_node_num = cpu_to_be32(osb->node_num);
-	response.r_response = cpu_to_be32(vote_response);
-
-	net_status = o2net_send_message(OCFS2_MESSAGE_TYPE_RESPONSE,
-					osb->net_key,
-					&response,
-					sizeof(struct ocfs2_response_msg),
-					node_num,
-					NULL);
-	/* We still want to error print for ENOPROTOOPT here. The
-	 * sending node shouldn't have unregistered his net handler
-	 * without sending an unmount vote 1st */
-	if (net_status < 0
-	    && net_status != -ETIMEDOUT
-	    && net_status != -ENOTCONN)
-		mlog(ML_ERROR, "message to node %u fails with error %d!\n",
-		     node_num, net_status);
-}
-
-static void ocfs2_vote_thread_do_work(struct ocfs2_super *osb)
-{
-	unsigned long processed;
-	struct ocfs2_lock_res *lockres;
-	struct ocfs2_vote_work *work;
-
-	mlog_entry_void();
-
-	spin_lock(&osb->vote_task_lock);
-	/* grab this early so we know to try again if a state change and
-	 * wake happens part-way through our work  */
-	osb->vote_work_sequence = osb->vote_wake_sequence;
-
-	processed = osb->blocked_lock_count;
-	while (processed) {
-		BUG_ON(list_empty(&osb->blocked_lock_list));
-
-		lockres = list_entry(osb->blocked_lock_list.next,
-				     struct ocfs2_lock_res, l_blocked_list);
-		list_del_init(&lockres->l_blocked_list);
-		osb->blocked_lock_count--;
-		spin_unlock(&osb->vote_task_lock);
-
-		BUG_ON(!processed);
-		processed--;
-
-		ocfs2_process_blocked_lock(osb, lockres);
-
-		spin_lock(&osb->vote_task_lock);
-	}
-
-	while (osb->vote_count) {
-		BUG_ON(list_empty(&osb->vote_list));
-		work = list_entry(osb->vote_list.next,
-				  struct ocfs2_vote_work, w_list);
-		list_del(&work->w_list);
-		osb->vote_count--;
-		spin_unlock(&osb->vote_task_lock);
-
-		ocfs2_process_vote(osb, &work->w_msg);
-		kfree(work);
-
-		spin_lock(&osb->vote_task_lock);
-	}
-	spin_unlock(&osb->vote_task_lock);
-
-	mlog_exit_void();
-}
-
-static int ocfs2_vote_thread_lists_empty(struct ocfs2_super *osb)
-{
-	int empty = 0;
-
-	spin_lock(&osb->vote_task_lock);
-	if (list_empty(&osb->blocked_lock_list) &&
-	    list_empty(&osb->vote_list))
-		empty = 1;
-
-	spin_unlock(&osb->vote_task_lock);
-	return empty;
-}
-
-static int ocfs2_vote_thread_should_wake(struct ocfs2_super *osb)
-{
-	int should_wake = 0;
-
-	spin_lock(&osb->vote_task_lock);
-	if (osb->vote_work_sequence != osb->vote_wake_sequence)
-		should_wake = 1;
-	spin_unlock(&osb->vote_task_lock);
-
-	return should_wake;
-}
-
-int ocfs2_vote_thread(void *arg)
-{
-	int status = 0;
-	struct ocfs2_super *osb = arg;
-
-	/* only quit once we've been asked to stop and there is no more
-	 * work available */
-	while (!(kthread_should_stop() &&
-		 ocfs2_vote_thread_lists_empty(osb))) {
-
-		wait_event_interruptible(osb->vote_event,
-					 ocfs2_vote_thread_should_wake(osb) ||
-					 kthread_should_stop());
-
-		mlog(0, "vote_thread: awoken\n");
-
-		ocfs2_vote_thread_do_work(osb);
-	}
-
-	osb->vote_task = NULL;
-	return status;
-}
-
-static struct ocfs2_net_wait_ctxt *ocfs2_new_net_wait_ctxt(unsigned int response_id)
-{
-	struct ocfs2_net_wait_ctxt *w;
-
-	w = kzalloc(sizeof(*w), GFP_NOFS);
-	if (!w) {
-		mlog_errno(-ENOMEM);
-		goto bail;
-	}
-
-	INIT_LIST_HEAD(&w->n_list);
-	init_waitqueue_head(&w->n_event);
-	ocfs2_node_map_init(&w->n_node_map);
-	w->n_response_id = response_id;
-	w->n_callback = NULL;
-bail:
-	return w;
-}
-
-static unsigned int ocfs2_new_response_id(struct ocfs2_super *osb)
-{
-	unsigned int ret;
-
-	spin_lock(&osb->net_response_lock);
-	ret = ++osb->net_response_ids;
-	spin_unlock(&osb->net_response_lock);
-
-	return ret;
-}
-
-static void ocfs2_dequeue_net_wait_ctxt(struct ocfs2_super *osb,
-					struct ocfs2_net_wait_ctxt *w)
-{
-	spin_lock(&osb->net_response_lock);
-	list_del(&w->n_list);
-	spin_unlock(&osb->net_response_lock);
-}
-
-static void ocfs2_queue_net_wait_ctxt(struct ocfs2_super *osb,
-				      struct ocfs2_net_wait_ctxt *w)
-{
-	spin_lock(&osb->net_response_lock);
-	list_add_tail(&w->n_list,
-		      &osb->net_response_list);
-	spin_unlock(&osb->net_response_lock);
-}
-
-static void __ocfs2_mark_node_responded(struct ocfs2_super *osb,
-					struct ocfs2_net_wait_ctxt *w,
-					int node_num)
-{
-	assert_spin_locked(&osb->net_response_lock);
-
-	ocfs2_node_map_clear_bit(osb, &w->n_node_map, node_num);
-	if (ocfs2_node_map_is_empty(osb, &w->n_node_map))
-		wake_up(&w->n_event);
-}
-
-/* Intended to be called from the node down callback, we fake remove
- * the node from all our response contexts */
-void ocfs2_remove_node_from_vote_queues(struct ocfs2_super *osb,
-					int node_num)
-{
-	struct list_head *p;
-	struct ocfs2_net_wait_ctxt *w = NULL;
-
-	spin_lock(&osb->net_response_lock);
-
-	list_for_each(p, &osb->net_response_list) {
-		w = list_entry(p, struct ocfs2_net_wait_ctxt, n_list);
-
-		__ocfs2_mark_node_responded(osb, w, node_num);
-	}
-
-	spin_unlock(&osb->net_response_lock);
-}
-
-static int ocfs2_broadcast_vote(struct ocfs2_super *osb,
-				struct ocfs2_vote_msg *request,
-				unsigned int response_id,
-				int *response,
-				struct ocfs2_net_response_cb *callback)
-{
-	int status, i, remote_err;
-	struct ocfs2_net_wait_ctxt *w = NULL;
-	int dequeued = 0;
-
-	mlog_entry_void();
-
-	w = ocfs2_new_net_wait_ctxt(response_id);
-	if (!w) {
-		status = -ENOMEM;
-		mlog_errno(status);
-		goto bail;
-	}
-	w->n_callback = callback;
-
-	/* we're pretty much ready to go at this point, and this fills
-	 * in n_response which we need anyway... */
-	ocfs2_queue_net_wait_ctxt(osb, w);
-
-	i = ocfs2_node_map_iterate(osb, &osb->mounted_map, 0);
-
-	while (i != O2NM_INVALID_NODE_NUM) {
-		if (i != osb->node_num) {
-			mlog(0, "trying to send request to node %i\n", i);
-			ocfs2_node_map_set_bit(osb, &w->n_node_map, i);
-
-			remote_err = 0;
-			status = o2net_send_message(OCFS2_MESSAGE_TYPE_VOTE,
-						    osb->net_key,
-						    request,
-						    sizeof(*request),
-						    i,
-						    &remote_err);
-			if (status == -ETIMEDOUT) {
-				mlog(0, "remote node %d timed out!\n", i);
-				status = -EAGAIN;
-				goto bail;
-			}
-			if (remote_err < 0) {
-				status = remote_err;
-				mlog(0, "remote error %d on node %d!\n",
-				     remote_err, i);
-				mlog_errno(status);
-				goto bail;
-			}
-			if (status < 0) {
-				mlog_errno(status);
-				goto bail;
-			}
-		}
-		i++;
-		i = ocfs2_node_map_iterate(osb, &osb->mounted_map, i);
-		mlog(0, "next is %d, i am %d\n", i, osb->node_num);
-	}
-	mlog(0, "done sending, now waiting on responses...\n");
-
-	wait_event(w->n_event, ocfs2_node_map_is_empty(osb, &w->n_node_map));
-
-	ocfs2_dequeue_net_wait_ctxt(osb, w);
-	dequeued = 1;
-
-	*response = w->n_response;
-	status = 0;
-bail:
-	if (w) {
-		if (!dequeued)
-			ocfs2_dequeue_net_wait_ctxt(osb, w);
-		kfree(w);
-	}
-
-	mlog_exit(status);
-	return status;
-}
-
-static struct ocfs2_vote_msg * ocfs2_new_vote_request(struct ocfs2_super *osb,
-						      u64 blkno,
-						      unsigned int generation,
-						      enum ocfs2_vote_request type)
-{
-	struct ocfs2_vote_msg *request;
-	struct ocfs2_msg_hdr *hdr;
-
-	BUG_ON(!ocfs2_is_valid_vote_request(type));
-
-	request = kzalloc(sizeof(*request), GFP_NOFS);
-	if (!request) {
-		mlog_errno(-ENOMEM);
-	} else {
-		hdr = &request->v_hdr;
-		hdr->h_node_num = cpu_to_be32(osb->node_num);
-		hdr->h_request = cpu_to_be32(type);
-		hdr->h_blkno = cpu_to_be64(blkno);
-		hdr->h_generation = cpu_to_be32(generation);
-	}
-
-	return request;
-}
-
-/* Complete the buildup of a new vote request and process the
- * broadcast return value. */
-static int ocfs2_do_request_vote(struct ocfs2_super *osb,
-				 struct ocfs2_vote_msg *request,
-				 struct ocfs2_net_response_cb *callback)
-{
-	int status, response = -EBUSY;
-	unsigned int response_id;
-	struct ocfs2_msg_hdr *hdr;
-
-	response_id = ocfs2_new_response_id(osb);
-
-	hdr = &request->v_hdr;
-	hdr->h_response_id = cpu_to_be32(response_id);
-
-	status = ocfs2_broadcast_vote(osb, request, response_id, &response,
-				      callback);
-	if (status < 0) {
-		mlog_errno(status);
-		goto bail;
-	}
-
-	status = response;
-bail:
-
-	return status;
-}
-
-int ocfs2_request_mount_vote(struct ocfs2_super *osb)
-{
-	int status;
-	struct ocfs2_vote_msg *request = NULL;
-
-	request = ocfs2_new_vote_request(osb, 0ULL, 0, OCFS2_VOTE_REQ_MOUNT);
-	if (!request) {
-		status = -ENOMEM;
-		goto bail;
-	}
-
-	status = -EAGAIN;
-	while (status == -EAGAIN) {
-		if (!(osb->s_mount_opt & OCFS2_MOUNT_NOINTR) &&
-		    signal_pending(current)) {
-			status = -ERESTARTSYS;
-			goto bail;
-		}
-
-		if (ocfs2_node_map_is_only(osb, &osb->mounted_map,
-					   osb->node_num)) {
-			status = 0;
-			goto bail;
-		}
-
-		status = ocfs2_do_request_vote(osb, request, NULL);
-	}
-
-bail:
-	kfree(request);
-	return status;
-}
-
-int ocfs2_request_umount_vote(struct ocfs2_super *osb)
-{
-	int status;
-	struct ocfs2_vote_msg *request = NULL;
-
-	request = ocfs2_new_vote_request(osb, 0ULL, 0, OCFS2_VOTE_REQ_UMOUNT);
-	if (!request) {
-		status = -ENOMEM;
-		goto bail;
-	}
-
-	status = -EAGAIN;
-	while (status == -EAGAIN) {
-		/* Do not check signals on this vote... We really want
-		 * this one to go all the way through. */
-
-		if (ocfs2_node_map_is_only(osb, &osb->mounted_map,
-					   osb->node_num)) {
-			status = 0;
-			goto bail;
-		}
-
-		status = ocfs2_do_request_vote(osb, request, NULL);
-	}
-
-bail:
-	kfree(request);
-	return status;
-}
-
-/* TODO: This should eventually be a hash table! */
-static struct ocfs2_net_wait_ctxt * __ocfs2_find_net_wait_ctxt(struct ocfs2_super *osb,
-							       u32 response_id)
-{
-	struct list_head *p;
-	struct ocfs2_net_wait_ctxt *w = NULL;
-
-	list_for_each(p, &osb->net_response_list) {
-		w = list_entry(p, struct ocfs2_net_wait_ctxt, n_list);
-		if (response_id == w->n_response_id)
-			break;
-		w = NULL;
-	}
-
-	return w;
-}
-
-/* Translate response codes into local node errno values */
-static inline int ocfs2_translate_response(int response)
-{
-	int ret;
-
-	switch (response) {
-	case OCFS2_RESPONSE_OK:
-		ret = 0;
-		break;
-
-	case OCFS2_RESPONSE_BUSY:
-		ret = -EBUSY;
-		break;
-
-	default:
-		ret = -EINVAL;
-	}
-
-	return ret;
-}
-
-static int ocfs2_handle_response_message(struct o2net_msg *msg,
-					 u32 len,
-					 void *data, void **ret_data)
-{
-	unsigned int response_id, node_num;
-	int response_status;
-	struct ocfs2_super *osb = data;
-	struct ocfs2_response_msg *resp;
-	struct ocfs2_net_wait_ctxt * w;
-	struct ocfs2_net_response_cb *resp_cb;
-
-	resp = (struct ocfs2_response_msg *) msg->buf;
-
-	response_id = be32_to_cpu(resp->r_hdr.h_response_id);
-	node_num = be32_to_cpu(resp->r_hdr.h_node_num);
-	response_status = 
-		ocfs2_translate_response(be32_to_cpu(resp->r_response));
-
-	mlog(0, "received response message:\n");
-	mlog(0, "h_response_id = %u\n", response_id);
-	mlog(0, "h_request = %u\n", be32_to_cpu(resp->r_hdr.h_request));
-	mlog(0, "h_blkno = %llu\n",
-	     (unsigned long long)be64_to_cpu(resp->r_hdr.h_blkno));
-	mlog(0, "h_generation = %u\n", be32_to_cpu(resp->r_hdr.h_generation));
-	mlog(0, "h_node_num = %u\n", node_num);
-	mlog(0, "r_response = %d\n", response_status);
-
-	spin_lock(&osb->net_response_lock);
-	w = __ocfs2_find_net_wait_ctxt(osb, response_id);
-	if (!w) {
-		mlog(0, "request not found!\n");
-		goto bail;
-	}
-	resp_cb = w->n_callback;
-
-	if (response_status && (!w->n_response)) {
-		/* we only really need one negative response so don't
-		 * set it twice. */
-		w->n_response = response_status;
-	}
-
-	if (resp_cb) {
-		spin_unlock(&osb->net_response_lock);
-
-		resp_cb->rc_cb(resp_cb->rc_priv, resp);
-
-		spin_lock(&osb->net_response_lock);
-	}
-
-	__ocfs2_mark_node_responded(osb, w, node_num);
-bail:
-	spin_unlock(&osb->net_response_lock);
-
-	return 0;
-}
-
-static int ocfs2_handle_vote_message(struct o2net_msg *msg,
-				     u32 len,
-				     void *data, void **ret_data)
-{
-	int status;
-	struct ocfs2_super *osb = data;
-	struct ocfs2_vote_work *work;
-
-	work = kmalloc(sizeof(struct ocfs2_vote_work), GFP_NOFS);
-	if (!work) {
-		status = -ENOMEM;
-		mlog_errno(status);
-		goto bail;
-	}
-
-	INIT_LIST_HEAD(&work->w_list);
-	memcpy(&work->w_msg, msg->buf, sizeof(struct ocfs2_vote_msg));
-
-	mlog(0, "scheduling vote request:\n");
-	mlog(0, "h_response_id = %u\n",
-	     be32_to_cpu(work->w_msg.v_hdr.h_response_id));
-	mlog(0, "h_request = %u\n", be32_to_cpu(work->w_msg.v_hdr.h_request));
-	mlog(0, "h_blkno = %llu\n",
-	     (unsigned long long)be64_to_cpu(work->w_msg.v_hdr.h_blkno));
-	mlog(0, "h_generation = %u\n",
-	     be32_to_cpu(work->w_msg.v_hdr.h_generation));
-	mlog(0, "h_node_num = %u\n",
-	     be32_to_cpu(work->w_msg.v_hdr.h_node_num));
-
-	spin_lock(&osb->vote_task_lock);
-	list_add_tail(&work->w_list, &osb->vote_list);
-	osb->vote_count++;
-	spin_unlock(&osb->vote_task_lock);
-
-	ocfs2_kick_vote_thread(osb);
-
-	status = 0;
-bail:
-	return status;
-}
-
-void ocfs2_unregister_net_handlers(struct ocfs2_super *osb)
-{
-	if (!osb->net_key)
-		return;
-
-	o2net_unregister_handler_list(&osb->osb_net_handlers);
-
-	if (!list_empty(&osb->net_response_list))
-		mlog(ML_ERROR, "net response list not empty!\n");
-
-	osb->net_key = 0;
-}
-
-int ocfs2_register_net_handlers(struct ocfs2_super *osb)
-{
-	int status = 0;
-
-	if (ocfs2_mount_local(osb))
-		return 0;
-
-	status = o2net_register_handler(OCFS2_MESSAGE_TYPE_RESPONSE,
-					osb->net_key,
-					sizeof(struct ocfs2_response_msg),
-					ocfs2_handle_response_message,
-					osb, NULL, &osb->osb_net_handlers);
-	if (status) {
-		mlog_errno(status);
-		goto bail;
-	}
-
-	status = o2net_register_handler(OCFS2_MESSAGE_TYPE_VOTE,
-					osb->net_key,
-					sizeof(struct ocfs2_vote_msg),
-					ocfs2_handle_vote_message,
-					osb, NULL, &osb->osb_net_handlers);
-	if (status) {
-		mlog_errno(status);
-		goto bail;
-	}
-bail:
-	if (status < 0)
-		ocfs2_unregister_net_handlers(osb);
-
-	return status;
-}