1 files changed, 0 insertions, 548 deletions

diff --git a/ANDROID_3.4.5/fs/ocfs2/dlm/dlmconvert.c b/ANDROID_3.4.5/fs/ocfs2/dlm/dlmconvert.c
deleted file mode 100644
index 29a886d1..00000000
--- a/ANDROID_3.4.5/fs/ocfs2/dlm/dlmconvert.c
+++ /dev/null
@@ -1,548 +0,0 @@
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * dlmconvert.c
- *
- * underlying calls for lock conversion
- *
- * Copyright (C) 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/module.h>
-#include <linux/fs.h>
-#include <linux/types.h>
-#include <linux/highmem.h>
-#include <linux/init.h>
-#include <linux/sysctl.h>
-#include <linux/random.h>
-#include <linux/blkdev.h>
-#include <linux/socket.h>
-#include <linux/inet.h>
-#include <linux/spinlock.h>
-
-
-#include "cluster/heartbeat.h"
-#include "cluster/nodemanager.h"
-#include "cluster/tcp.h"
-
-#include "dlmapi.h"
-#include "dlmcommon.h"
-
-#include "dlmconvert.h"
-
-#define MLOG_MASK_PREFIX ML_DLM
-#include "cluster/masklog.h"
-
-/* NOTE: __dlmconvert_master is the only function in here that
- * needs a spinlock held on entry (res->spinlock) and it is the
- * only one that holds a lock on exit (res->spinlock).
- * All other functions in here need no locks and drop all of
- * the locks that they acquire. */
-static enum dlm_status __dlmconvert_master(struct dlm_ctxt *dlm,
-					   struct dlm_lock_resource *res,
-					   struct dlm_lock *lock, int flags,
-					   int type, int *call_ast,
-					   int *kick_thread);
-static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm,
-					   struct dlm_lock_resource *res,
-					   struct dlm_lock *lock, int flags, int type);
-
-/*
- * this is only called directly by dlmlock(), and only when the
- * local node is the owner of the lockres
- * locking:
- *   caller needs:  none
- *   taken:         takes and drops res->spinlock
- *   held on exit:  none
- * returns: see __dlmconvert_master
- */
-enum dlm_status dlmconvert_master(struct dlm_ctxt *dlm,
-				  struct dlm_lock_resource *res,
-				  struct dlm_lock *lock, int flags, int type)
-{
-	int call_ast = 0, kick_thread = 0;
-	enum dlm_status status;
-
-	spin_lock(&res->spinlock);
-	/* we are not in a network handler, this is fine */
-	__dlm_wait_on_lockres(res);
-	__dlm_lockres_reserve_ast(res);
-	res->state |= DLM_LOCK_RES_IN_PROGRESS;
-
-	status = __dlmconvert_master(dlm, res, lock, flags, type,
-				     &call_ast, &kick_thread);
-
-	res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
-	spin_unlock(&res->spinlock);
-	wake_up(&res->wq);
-	if (status != DLM_NORMAL && status != DLM_NOTQUEUED)
-		dlm_error(status);
-
-	/* either queue the ast or release it */
-	if (call_ast)
-		dlm_queue_ast(dlm, lock);
-	else
-		dlm_lockres_release_ast(dlm, res);
-
-	if (kick_thread)
-		dlm_kick_thread(dlm, res);
-
-	return status;
-}
-
-/* performs lock conversion at the lockres master site
- * locking:
- *   caller needs:  res->spinlock
- *   taken:         takes and drops lock->spinlock
- *   held on exit:  res->spinlock
- * returns: DLM_NORMAL, DLM_NOTQUEUED, DLM_DENIED
- *   call_ast: whether ast should be called for this lock
- *   kick_thread: whether dlm_kick_thread should be called
- */
-static enum dlm_status __dlmconvert_master(struct dlm_ctxt *dlm,
-					   struct dlm_lock_resource *res,
-					   struct dlm_lock *lock, int flags,
-					   int type, int *call_ast,
-					   int *kick_thread)
-{
-	enum dlm_status status = DLM_NORMAL;
-	struct list_head *iter;
-	struct dlm_lock *tmplock=NULL;
-
-	assert_spin_locked(&res->spinlock);
-
-	mlog(0, "type=%d, convert_type=%d, new convert_type=%d\n",
-	     lock->ml.type, lock->ml.convert_type, type);
-
-	spin_lock(&lock->spinlock);
-
-	/* already converting? */
-	if (lock->ml.convert_type != LKM_IVMODE) {
-		mlog(ML_ERROR, "attempted to convert a lock with a lock "
-		     "conversion pending\n");
-		status = DLM_DENIED;
-		goto unlock_exit;
-	}
-
-	/* must be on grant queue to convert */
-	if (!dlm_lock_on_list(&res->granted, lock)) {
-		mlog(ML_ERROR, "attempted to convert a lock not on grant "
-		     "queue\n");
-		status = DLM_DENIED;
-		goto unlock_exit;
-	}
-
-	if (flags & LKM_VALBLK) {
-		switch (lock->ml.type) {
-			case LKM_EXMODE:
-				/* EX + LKM_VALBLK + convert == set lvb */
-				mlog(0, "will set lvb: converting %s->%s\n",
-				     dlm_lock_mode_name(lock->ml.type),
-				     dlm_lock_mode_name(type));
-				lock->lksb->flags |= DLM_LKSB_PUT_LVB;
-				break;
-			case LKM_PRMODE:
-			case LKM_NLMODE:
-				/* refetch if new level is not NL */
-				if (type > LKM_NLMODE) {
-					mlog(0, "will fetch new value into "
-					     "lvb: converting %s->%s\n",
-					     dlm_lock_mode_name(lock->ml.type),
-					     dlm_lock_mode_name(type));
-					lock->lksb->flags |= DLM_LKSB_GET_LVB;
-				} else {
-					mlog(0, "will NOT fetch new value "
-					     "into lvb: converting %s->%s\n",
-					     dlm_lock_mode_name(lock->ml.type),
-					     dlm_lock_mode_name(type));
-					flags &= ~(LKM_VALBLK);
-				}
-				break;
-		}
-	}
-
-
-	/* in-place downconvert? */
-	if (type <= lock->ml.type)
-		goto grant;
-
-	/* upconvert from here on */
-	status = DLM_NORMAL;
-	list_for_each(iter, &res->granted) {
-		tmplock = list_entry(iter, struct dlm_lock, list);
-		if (tmplock == lock)
-			continue;
-		if (!dlm_lock_compatible(tmplock->ml.type, type))
-			goto switch_queues;
-	}
-
-	list_for_each(iter, &res->converting) {
-		tmplock = list_entry(iter, struct dlm_lock, list);
-		if (!dlm_lock_compatible(tmplock->ml.type, type))
-			goto switch_queues;
-		/* existing conversion requests take precedence */
-		if (!dlm_lock_compatible(tmplock->ml.convert_type, type))
-			goto switch_queues;
-	}
-
-	/* fall thru to grant */
-
-grant:
-	mlog(0, "res %.*s, granting %s lock\n", res->lockname.len,
-	     res->lockname.name, dlm_lock_mode_name(type));
-	/* immediately grant the new lock type */
-	lock->lksb->status = DLM_NORMAL;
-	if (lock->ml.node == dlm->node_num)
-		mlog(0, "doing in-place convert for nonlocal lock\n");
-	lock->ml.type = type;
-	if (lock->lksb->flags & DLM_LKSB_PUT_LVB)
-		memcpy(res->lvb, lock->lksb->lvb, DLM_LVB_LEN);
-
-	status = DLM_NORMAL;
-	*call_ast = 1;
-	goto unlock_exit;
-
-switch_queues:
-	if (flags & LKM_NOQUEUE) {
-		mlog(0, "failed to convert NOQUEUE lock %.*s from "
-		     "%d to %d...\n", res->lockname.len, res->lockname.name,
-		     lock->ml.type, type);
-		status = DLM_NOTQUEUED;
-		goto unlock_exit;
-	}
-	mlog(0, "res %.*s, queueing...\n", res->lockname.len,
-	     res->lockname.name);
-
-	lock->ml.convert_type = type;
-	/* do not alter lock refcount.  switching lists. */
-	list_move_tail(&lock->list, &res->converting);
-
-unlock_exit:
-	spin_unlock(&lock->spinlock);
-	if (status == DLM_DENIED) {
-		__dlm_print_one_lock_resource(res);
-	}
-	if (status == DLM_NORMAL)
-		*kick_thread = 1;
-	return status;
-}
-
-void dlm_revert_pending_convert(struct dlm_lock_resource *res,
-				struct dlm_lock *lock)
-{
-	/* do not alter lock refcount.  switching lists. */
-	list_move_tail(&lock->list, &res->granted);
-	lock->ml.convert_type = LKM_IVMODE;
-	lock->lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB);
-}
-
-/* messages the master site to do lock conversion
- * locking:
- *   caller needs:  none
- *   taken:         takes and drops res->spinlock, uses DLM_LOCK_RES_IN_PROGRESS
- *   held on exit:  none
- * returns: DLM_NORMAL, DLM_RECOVERING, status from remote node
- */
-enum dlm_status dlmconvert_remote(struct dlm_ctxt *dlm,
-				  struct dlm_lock_resource *res,
-				  struct dlm_lock *lock, int flags, int type)
-{
-	enum dlm_status status;
-
-	mlog(0, "type=%d, convert_type=%d, busy=%d\n", lock->ml.type,
-	     lock->ml.convert_type, res->state & DLM_LOCK_RES_IN_PROGRESS);
-
-	spin_lock(&res->spinlock);
-	if (res->state & DLM_LOCK_RES_RECOVERING) {
-		mlog(0, "bailing out early since res is RECOVERING "
-		     "on secondary queue\n");
-		/* __dlm_print_one_lock_resource(res); */
-		status = DLM_RECOVERING;
-		goto bail;
-	}
-	/* will exit this call with spinlock held */
-	__dlm_wait_on_lockres(res);
-
-	if (lock->ml.convert_type != LKM_IVMODE) {
-		__dlm_print_one_lock_resource(res);
-		mlog(ML_ERROR, "converting a remote lock that is already "
-		     "converting! (cookie=%u:%llu, conv=%d)\n",
-		     dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
-		     dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
-		     lock->ml.convert_type);
-		status = DLM_DENIED;
-		goto bail;
-	}
-	res->state |= DLM_LOCK_RES_IN_PROGRESS;
-	/* move lock to local convert queue */
-	/* do not alter lock refcount.  switching lists. */
-	list_move_tail(&lock->list, &res->converting);
-	lock->convert_pending = 1;
-	lock->ml.convert_type = type;
-
-	if (flags & LKM_VALBLK) {
-		if (lock->ml.type == LKM_EXMODE) {
-			flags |= LKM_PUT_LVB;
-			lock->lksb->flags |= DLM_LKSB_PUT_LVB;
-		} else {
-			if (lock->ml.convert_type == LKM_NLMODE)
-				flags &= ~LKM_VALBLK;
-			else {
-				flags |= LKM_GET_LVB;
-				lock->lksb->flags |= DLM_LKSB_GET_LVB;
-			}
-		}
-	}
-	spin_unlock(&res->spinlock);
-
-	/* no locks held here.
-	 * need to wait for a reply as to whether it got queued or not. */
-	status = dlm_send_remote_convert_request(dlm, res, lock, flags, type);
-
-	spin_lock(&res->spinlock);
-	res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
-	lock->convert_pending = 0;
-	/* if it failed, move it back to granted queue */
-	if (status != DLM_NORMAL) {
-		if (status != DLM_NOTQUEUED)
-			dlm_error(status);
-		dlm_revert_pending_convert(res, lock);
-	}
-bail:
-	spin_unlock(&res->spinlock);
-
-	/* TODO: should this be a wake_one? */
-	/* wake up any IN_PROGRESS waiters */
-	wake_up(&res->wq);
-
-	return status;
-}
-
-/* sends DLM_CONVERT_LOCK_MSG to master site
- * locking:
- *   caller needs:  none
- *   taken:         none
- *   held on exit:  none
- * returns: DLM_NOLOCKMGR, status from remote node
- */
-static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm,
-					   struct dlm_lock_resource *res,
-					   struct dlm_lock *lock, int flags, int type)
-{
-	struct dlm_convert_lock convert;
-	int tmpret;
-	enum dlm_status ret;
-	int status = 0;
-	struct kvec vec[2];
-	size_t veclen = 1;
-
-	mlog(0, "%.*s\n", res->lockname.len, res->lockname.name);
-
-	memset(&convert, 0, sizeof(struct dlm_convert_lock));
-	convert.node_idx = dlm->node_num;
-	convert.requested_type = type;
-	convert.cookie = lock->ml.cookie;
-	convert.namelen = res->lockname.len;
-	convert.flags = cpu_to_be32(flags);
-	memcpy(convert.name, res->lockname.name, convert.namelen);
-
-	vec[0].iov_len = sizeof(struct dlm_convert_lock);
-	vec[0].iov_base = &convert;
-
-	if (flags & LKM_PUT_LVB) {
-		/* extra data to send if we are updating lvb */
-		vec[1].iov_len = DLM_LVB_LEN;
-		vec[1].iov_base = lock->lksb->lvb;
-		veclen++;
-	}
-
-	tmpret = o2net_send_message_vec(DLM_CONVERT_LOCK_MSG, dlm->key,
-					vec, veclen, res->owner, &status);
-	if (tmpret >= 0) {
-		// successfully sent and received
-		ret = status;  // this is already a dlm_status
-		if (ret == DLM_RECOVERING) {
-			mlog(0, "node %u returned DLM_RECOVERING from convert "
-			     "message!\n", res->owner);
-		} else if (ret == DLM_MIGRATING) {
-			mlog(0, "node %u returned DLM_MIGRATING from convert "
-			     "message!\n", res->owner);
-		} else if (ret == DLM_FORWARD) {
-			mlog(0, "node %u returned DLM_FORWARD from convert "
-			     "message!\n", res->owner);
-		} else if (ret != DLM_NORMAL && ret != DLM_NOTQUEUED)
-			dlm_error(ret);
-	} else {
-		mlog(ML_ERROR, "Error %d when sending message %u (key 0x%x) to "
-		     "node %u\n", tmpret, DLM_CONVERT_LOCK_MSG, dlm->key,
-		     res->owner);
-		if (dlm_is_host_down(tmpret)) {
-			/* instead of logging the same network error over
-			 * and over, sleep here and wait for the heartbeat
-			 * to notice the node is dead.  times out after 5s. */
-			dlm_wait_for_node_death(dlm, res->owner,
-						DLM_NODE_DEATH_WAIT_MAX);
-			ret = DLM_RECOVERING;
-			mlog(0, "node %u died so returning DLM_RECOVERING "
-			     "from convert message!\n", res->owner);
-		} else {
-			ret = dlm_err_to_dlm_status(tmpret);
-		}
-	}
-
-	return ret;
-}
-
-/* handler for DLM_CONVERT_LOCK_MSG on master site
- * locking:
- *   caller needs:  none
- *   taken:         takes and drop res->spinlock
- *   held on exit:  none
- * returns: DLM_NORMAL, DLM_IVLOCKID, DLM_BADARGS,
- *          status from __dlmconvert_master
- */
-int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data,
-			     void **ret_data)
-{
-	struct dlm_ctxt *dlm = data;
-	struct dlm_convert_lock *cnv = (struct dlm_convert_lock *)msg->buf;
-	struct dlm_lock_resource *res = NULL;
-	struct list_head *iter;
-	struct dlm_lock *lock = NULL;
-	struct dlm_lockstatus *lksb;
-	enum dlm_status status = DLM_NORMAL;
-	u32 flags;
-	int call_ast = 0, kick_thread = 0, ast_reserved = 0, wake = 0;
-
-	if (!dlm_grab(dlm)) {
-		dlm_error(DLM_REJECTED);
-		return DLM_REJECTED;
-	}
-
-	mlog_bug_on_msg(!dlm_domain_fully_joined(dlm),
-			"Domain %s not fully joined!\n", dlm->name);
-
-	if (cnv->namelen > DLM_LOCKID_NAME_MAX) {
-		status = DLM_IVBUFLEN;
-		dlm_error(status);
-		goto leave;
-	}
-
-	flags = be32_to_cpu(cnv->flags);
-
-	if ((flags & (LKM_PUT_LVB|LKM_GET_LVB)) ==
-	     (LKM_PUT_LVB|LKM_GET_LVB)) {
-		mlog(ML_ERROR, "both PUT and GET lvb specified\n");
-		status = DLM_BADARGS;
-		goto leave;
-	}
-
-	mlog(0, "lvb: %s\n", flags & LKM_PUT_LVB ? "put lvb" :
-	     (flags & LKM_GET_LVB ? "get lvb" : "none"));
-
-	status = DLM_IVLOCKID;
-	res = dlm_lookup_lockres(dlm, cnv->name, cnv->namelen);
-	if (!res) {
-		dlm_error(status);
-		goto leave;
-	}
-
-	spin_lock(&res->spinlock);
-	status = __dlm_lockres_state_to_status(res);
-	if (status != DLM_NORMAL) {
-		spin_unlock(&res->spinlock);
-		dlm_error(status);
-		goto leave;
-	}
-	list_for_each(iter, &res->granted) {
-		lock = list_entry(iter, struct dlm_lock, list);
-		if (lock->ml.cookie == cnv->cookie &&
-		    lock->ml.node == cnv->node_idx) {
-			dlm_lock_get(lock);
-			break;
-		}
-		lock = NULL;
-	}
-	spin_unlock(&res->spinlock);
-	if (!lock) {
-		status = DLM_IVLOCKID;
-		mlog(ML_ERROR, "did not find lock to convert on grant queue! "
-			       "cookie=%u:%llu\n",
-		     dlm_get_lock_cookie_node(be64_to_cpu(cnv->cookie)),
-		     dlm_get_lock_cookie_seq(be64_to_cpu(cnv->cookie)));
-		dlm_print_one_lock_resource(res);
-		goto leave;
-	}
-
-	/* found the lock */
-	lksb = lock->lksb;
-
-	/* see if caller needed to get/put lvb */
-	if (flags & LKM_PUT_LVB) {
-		BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB));
-		lksb->flags |= DLM_LKSB_PUT_LVB;
-		memcpy(&lksb->lvb[0], &cnv->lvb[0], DLM_LVB_LEN);
-	} else if (flags & LKM_GET_LVB) {
-		BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB));
-		lksb->flags |= DLM_LKSB_GET_LVB;
-	}
-
-	spin_lock(&res->spinlock);
-	status = __dlm_lockres_state_to_status(res);
-	if (status == DLM_NORMAL) {
-		__dlm_lockres_reserve_ast(res);
-		ast_reserved = 1;
-		res->state |= DLM_LOCK_RES_IN_PROGRESS;
-		status = __dlmconvert_master(dlm, res, lock, flags,
-					     cnv->requested_type,
-					     &call_ast, &kick_thread);
-		res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
-		wake = 1;
-	}
-	spin_unlock(&res->spinlock);
-	if (wake)
-		wake_up(&res->wq);
-
-	if (status != DLM_NORMAL) {
-		if (status != DLM_NOTQUEUED)
-			dlm_error(status);
-		lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB);
-	}
-
-leave:
-	if (lock)
-		dlm_lock_put(lock);
-
-	/* either queue the ast or release it, if reserved */
-	if (call_ast)
-		dlm_queue_ast(dlm, lock);
-	else if (ast_reserved)
-		dlm_lockres_release_ast(dlm, res);
-
-	if (kick_thread)
-		dlm_kick_thread(dlm, res);
-
-	if (res)
-		dlm_lockres_put(res);
-
-	dlm_put(dlm);
-
-	return status;
-}