1 files changed, 0 insertions, 502 deletions

diff --git a/ANDROID_3.4.5/fs/ocfs2/dlm/dlmast.c b/ANDROID_3.4.5/fs/ocfs2/dlm/dlmast.c
deleted file mode 100644
index 3a3ed4bb..00000000
--- a/ANDROID_3.4.5/fs/ocfs2/dlm/dlmast.c
+++ /dev/null
@@ -1,502 +0,0 @@
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * dlmast.c
- *
- * AST and BAST functionality for local and remote nodes
- *
- * 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"
-
-#define MLOG_MASK_PREFIX ML_DLM
-#include "cluster/masklog.h"
-
-static void dlm_update_lvb(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
-			   struct dlm_lock *lock);
-static int dlm_should_cancel_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock);
-
-/* Should be called as an ast gets queued to see if the new
- * lock level will obsolete a pending bast.
- * For example, if dlm_thread queued a bast for an EX lock that
- * was blocking another EX, but before sending the bast the
- * lock owner downconverted to NL, the bast is now obsolete.
- * Only the ast should be sent.
- * This is needed because the lock and convert paths can queue
- * asts out-of-band (not waiting for dlm_thread) in order to
- * allow for LKM_NOQUEUE to get immediate responses. */
-static int dlm_should_cancel_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock)
-{
-	assert_spin_locked(&dlm->ast_lock);
-	assert_spin_locked(&lock->spinlock);
-
-	if (lock->ml.highest_blocked == LKM_IVMODE)
-		return 0;
-	BUG_ON(lock->ml.highest_blocked == LKM_NLMODE);
-
-	if (lock->bast_pending &&
-	    list_empty(&lock->bast_list))
-		/* old bast already sent, ok */
-		return 0;
-
-	if (lock->ml.type == LKM_EXMODE)
-		/* EX blocks anything left, any bast still valid */
-		return 0;
-	else if (lock->ml.type == LKM_NLMODE)
-		/* NL blocks nothing, no reason to send any bast, cancel it */
-		return 1;
-	else if (lock->ml.highest_blocked != LKM_EXMODE)
-		/* PR only blocks EX */
-		return 1;
-
-	return 0;
-}
-
-void __dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock)
-{
-	struct dlm_lock_resource *res;
-
-	BUG_ON(!dlm);
-	BUG_ON(!lock);
-
-	res = lock->lockres;
-
-	assert_spin_locked(&dlm->ast_lock);
-
-	if (!list_empty(&lock->ast_list)) {
-		mlog(ML_ERROR, "%s: res %.*s, lock %u:%llu, "
-		     "AST list not empty, pending %d, newlevel %d\n",
-		     dlm->name, res->lockname.len, res->lockname.name,
-		     dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
-		     dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
-		     lock->ast_pending, lock->ml.type);
-		BUG();
-	}
-	if (lock->ast_pending)
-		mlog(0, "%s: res %.*s, lock %u:%llu, AST getting flushed\n",
-		     dlm->name, res->lockname.len, res->lockname.name,
-		     dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
-		     dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)));
-
-	/* putting lock on list, add a ref */
-	dlm_lock_get(lock);
-	spin_lock(&lock->spinlock);
-
-	/* check to see if this ast obsoletes the bast */
-	if (dlm_should_cancel_bast(dlm, lock)) {
-		mlog(0, "%s: res %.*s, lock %u:%llu, Cancelling BAST\n",
-		     dlm->name, res->lockname.len, res->lockname.name,
-		     dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
-		     dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)));
-		lock->bast_pending = 0;
-		list_del_init(&lock->bast_list);
-		lock->ml.highest_blocked = LKM_IVMODE;
-		/* removing lock from list, remove a ref.  guaranteed
-		 * this won't be the last ref because of the get above,
-		 * so res->spinlock will not be taken here */
-		dlm_lock_put(lock);
-		/* free up the reserved bast that we are cancelling.
-		 * guaranteed that this will not be the last reserved
-		 * ast because *both* an ast and a bast were reserved
-		 * to get to this point.  the res->spinlock will not be
-		 * taken here */
-		dlm_lockres_release_ast(dlm, res);
-	}
-	list_add_tail(&lock->ast_list, &dlm->pending_asts);
-	lock->ast_pending = 1;
-	spin_unlock(&lock->spinlock);
-}
-
-void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock)
-{
-	BUG_ON(!dlm);
-	BUG_ON(!lock);
-
-	spin_lock(&dlm->ast_lock);
-	__dlm_queue_ast(dlm, lock);
-	spin_unlock(&dlm->ast_lock);
-}
-
-
-void __dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock)
-{
-	struct dlm_lock_resource *res;
-
-	BUG_ON(!dlm);
-	BUG_ON(!lock);
-
-	assert_spin_locked(&dlm->ast_lock);
-
-	res = lock->lockres;
-
-	BUG_ON(!list_empty(&lock->bast_list));
-	if (lock->bast_pending)
-		mlog(0, "%s: res %.*s, lock %u:%llu, BAST getting flushed\n",
-		     dlm->name, res->lockname.len, res->lockname.name,
-		     dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
-		     dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)));
-
-	/* putting lock on list, add a ref */
-	dlm_lock_get(lock);
-	spin_lock(&lock->spinlock);
-	list_add_tail(&lock->bast_list, &dlm->pending_basts);
-	lock->bast_pending = 1;
-	spin_unlock(&lock->spinlock);
-}
-
-void dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock)
-{
-	BUG_ON(!dlm);
-	BUG_ON(!lock);
-
-	spin_lock(&dlm->ast_lock);
-	__dlm_queue_bast(dlm, lock);
-	spin_unlock(&dlm->ast_lock);
-}
-
-static void dlm_update_lvb(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
-			   struct dlm_lock *lock)
-{
-	struct dlm_lockstatus *lksb = lock->lksb;
-	BUG_ON(!lksb);
-
-	/* only updates if this node masters the lockres */
-	spin_lock(&res->spinlock);
-	if (res->owner == dlm->node_num) {
-		/* check the lksb flags for the direction */
-		if (lksb->flags & DLM_LKSB_GET_LVB) {
-			mlog(0, "getting lvb from lockres for %s node\n",
-				  lock->ml.node == dlm->node_num ? "master" :
-				  "remote");
-			memcpy(lksb->lvb, res->lvb, DLM_LVB_LEN);
-		}
-		/* Do nothing for lvb put requests - they should be done in
- 		 * place when the lock is downconverted - otherwise we risk
- 		 * racing gets and puts which could result in old lvb data
- 		 * being propagated. We leave the put flag set and clear it
- 		 * here. In the future we might want to clear it at the time
- 		 * the put is actually done.
-		 */
-	}
-	spin_unlock(&res->spinlock);
-
-	/* reset any lvb flags on the lksb */
-	lksb->flags &= ~(DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB);
-}
-
-void dlm_do_local_ast(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
-		      struct dlm_lock *lock)
-{
-	dlm_astlockfunc_t *fn;
-	struct dlm_lockstatus *lksb;
-
-	mlog(0, "%s: res %.*s, lock %u:%llu, Local AST\n", dlm->name,
-	     res->lockname.len, res->lockname.name,
-	     dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
-	     dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)));
-
-	lksb = lock->lksb;
-	fn = lock->ast;
-	BUG_ON(lock->ml.node != dlm->node_num);
-
-	dlm_update_lvb(dlm, res, lock);
-	(*fn)(lock->astdata);
-}
-
-
-int dlm_do_remote_ast(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
-		      struct dlm_lock *lock)
-{
-	int ret;
-	struct dlm_lockstatus *lksb;
-	int lksbflags;
-
-	mlog(0, "%s: res %.*s, lock %u:%llu, Remote AST\n", dlm->name,
-	     res->lockname.len, res->lockname.name,
-	     dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
-	     dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)));
-
-	lksb = lock->lksb;
-	BUG_ON(lock->ml.node == dlm->node_num);
-
-	lksbflags = lksb->flags;
-	dlm_update_lvb(dlm, res, lock);
-
-	/* lock request came from another node
-	 * go do the ast over there */
-	ret = dlm_send_proxy_ast(dlm, res, lock, lksbflags);
-	return ret;
-}
-
-void dlm_do_local_bast(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
-		       struct dlm_lock *lock, int blocked_type)
-{
-	dlm_bastlockfunc_t *fn = lock->bast;
-
-	BUG_ON(lock->ml.node != dlm->node_num);
-
-	mlog(0, "%s: res %.*s, lock %u:%llu, Local BAST, blocked %d\n",
-	     dlm->name, res->lockname.len, res->lockname.name,
-	     dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
-	     dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
-	     blocked_type);
-
-	(*fn)(lock->astdata, blocked_type);
-}
-
-
-
-int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data,
-			  void **ret_data)
-{
-	int ret;
-	unsigned int locklen;
-	struct dlm_ctxt *dlm = data;
-	struct dlm_lock_resource *res = NULL;
-	struct dlm_lock *lock = NULL;
-	struct dlm_proxy_ast *past = (struct dlm_proxy_ast *) msg->buf;
-	char *name;
-	struct list_head *iter, *head=NULL;
-	u64 cookie;
-	u32 flags;
-	u8 node;
-
-	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);
-
-	name = past->name;
-	locklen = past->namelen;
-	cookie = past->cookie;
-	flags = be32_to_cpu(past->flags);
-	node = past->node_idx;
-
-	if (locklen > DLM_LOCKID_NAME_MAX) {
-		ret = DLM_IVBUFLEN;
-		mlog(ML_ERROR, "Invalid name length (%d) in proxy ast "
-		     "handler!\n", locklen);
-		goto leave;
-	}
-
-	if ((flags & (LKM_PUT_LVB|LKM_GET_LVB)) ==
-	     (LKM_PUT_LVB|LKM_GET_LVB)) {
-		mlog(ML_ERROR, "Both PUT and GET lvb specified, (0x%x)\n",
-		     flags);
-		ret = DLM_BADARGS;
-		goto leave;
-	}
-
-	mlog(0, "lvb: %s\n", flags & LKM_PUT_LVB ? "put lvb" :
-		  (flags & LKM_GET_LVB ? "get lvb" : "none"));
-
-	mlog(0, "type=%d, blocked_type=%d\n", past->type, past->blocked_type);
-
-	if (past->type != DLM_AST &&
-	    past->type != DLM_BAST) {
-		mlog(ML_ERROR, "Unknown ast type! %d, cookie=%u:%llu"
-		     "name=%.*s, node=%u\n", past->type,
-		     dlm_get_lock_cookie_node(be64_to_cpu(cookie)),
-		     dlm_get_lock_cookie_seq(be64_to_cpu(cookie)),
-		     locklen, name, node);
-		ret = DLM_IVLOCKID;
-		goto leave;
-	}
-
-	res = dlm_lookup_lockres(dlm, name, locklen);
-	if (!res) {
-		mlog(0, "Got %sast for unknown lockres! cookie=%u:%llu, "
-		     "name=%.*s, node=%u\n", (past->type == DLM_AST ? "" : "b"),
-		     dlm_get_lock_cookie_node(be64_to_cpu(cookie)),
-		     dlm_get_lock_cookie_seq(be64_to_cpu(cookie)),
-		     locklen, name, node);
-		ret = DLM_IVLOCKID;
-		goto leave;
-	}
-
-	/* cannot get a proxy ast message if this node owns it */
-	BUG_ON(res->owner == dlm->node_num);
-
-	mlog(0, "%s: res %.*s\n", dlm->name, res->lockname.len,
-	     res->lockname.name);
-
-	spin_lock(&res->spinlock);
-	if (res->state & DLM_LOCK_RES_RECOVERING) {
-		mlog(0, "Responding with DLM_RECOVERING!\n");
-		ret = DLM_RECOVERING;
-		goto unlock_out;
-	}
-	if (res->state & DLM_LOCK_RES_MIGRATING) {
-		mlog(0, "Responding with DLM_MIGRATING!\n");
-		ret = DLM_MIGRATING;
-		goto unlock_out;
-	}
-	/* try convert queue for both ast/bast */
-	head = &res->converting;
-	lock = NULL;
-	list_for_each(iter, head) {
-		lock = list_entry (iter, struct dlm_lock, list);
-		if (lock->ml.cookie == cookie)
-			goto do_ast;
-	}
-
-	/* if not on convert, try blocked for ast, granted for bast */
-	if (past->type == DLM_AST)
-		head = &res->blocked;
-	else
-		head = &res->granted;
-
-	list_for_each(iter, head) {
-		lock = list_entry (iter, struct dlm_lock, list);
-		if (lock->ml.cookie == cookie)
-			goto do_ast;
-	}
-
-	mlog(0, "Got %sast for unknown lock! cookie=%u:%llu, name=%.*s, "
-	     "node=%u\n", past->type == DLM_AST ? "" : "b",
-	     dlm_get_lock_cookie_node(be64_to_cpu(cookie)),
-	     dlm_get_lock_cookie_seq(be64_to_cpu(cookie)),
-	     locklen, name, node);
-
-	ret = DLM_NORMAL;
-unlock_out:
-	spin_unlock(&res->spinlock);
-	goto leave;
-
-do_ast:
-	ret = DLM_NORMAL;
-	if (past->type == DLM_AST) {
-		/* do not alter lock refcount.  switching lists. */
-		list_move_tail(&lock->list, &res->granted);
-		mlog(0, "%s: res %.*s, lock %u:%llu, Granted type %d => %d\n",
-		     dlm->name, res->lockname.len, res->lockname.name,
-		     dlm_get_lock_cookie_node(be64_to_cpu(cookie)),
-		     dlm_get_lock_cookie_seq(be64_to_cpu(cookie)),
-		     lock->ml.type, lock->ml.convert_type);
-
-		if (lock->ml.convert_type != LKM_IVMODE) {
-			lock->ml.type = lock->ml.convert_type;
-			lock->ml.convert_type = LKM_IVMODE;
-		} else {
-			// should already be there....
-		}
-
-		lock->lksb->status = DLM_NORMAL;
-
-		/* if we requested the lvb, fetch it into our lksb now */
-		if (flags & LKM_GET_LVB) {
-			BUG_ON(!(lock->lksb->flags & DLM_LKSB_GET_LVB));
-			memcpy(lock->lksb->lvb, past->lvb, DLM_LVB_LEN);
-		}
-	}
-	spin_unlock(&res->spinlock);
-
-	if (past->type == DLM_AST)
-		dlm_do_local_ast(dlm, res, lock);
-	else
-		dlm_do_local_bast(dlm, res, lock, past->blocked_type);
-
-leave:
-	if (res)
-		dlm_lockres_put(res);
-
-	dlm_put(dlm);
-	return ret;
-}
-
-
-
-int dlm_send_proxy_ast_msg(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
-			   struct dlm_lock *lock, int msg_type,
-			   int blocked_type, int flags)
-{
-	int ret = 0;
-	struct dlm_proxy_ast past;
-	struct kvec vec[2];
-	size_t veclen = 1;
-	int status;
-
-	mlog(0, "%s: res %.*s, to %u, type %d, blocked_type %d\n", dlm->name,
-	     res->lockname.len, res->lockname.name, lock->ml.node, msg_type,
-	     blocked_type);
-
-	memset(&past, 0, sizeof(struct dlm_proxy_ast));
-	past.node_idx = dlm->node_num;
-	past.type = msg_type;
-	past.blocked_type = blocked_type;
-	past.namelen = res->lockname.len;
-	memcpy(past.name, res->lockname.name, past.namelen);
-	past.cookie = lock->ml.cookie;
-
-	vec[0].iov_len = sizeof(struct dlm_proxy_ast);
-	vec[0].iov_base = &past;
-	if (flags & DLM_LKSB_GET_LVB) {
-		be32_add_cpu(&past.flags, LKM_GET_LVB);
-		vec[1].iov_len = DLM_LVB_LEN;
-		vec[1].iov_base = lock->lksb->lvb;
-		veclen++;
-	}
-
-	ret = o2net_send_message_vec(DLM_PROXY_AST_MSG, dlm->key, vec, veclen,
-				     lock->ml.node, &status);
-	if (ret < 0)
-		mlog(ML_ERROR, "%s: res %.*s, error %d send AST to node %u\n",
-		     dlm->name, res->lockname.len, res->lockname.name, ret,
-		     lock->ml.node);
-	else {
-		if (status == DLM_RECOVERING) {
-			mlog(ML_ERROR, "sent AST to node %u, it thinks this "
-			     "node is dead!\n", lock->ml.node);
-			BUG();
-		} else if (status == DLM_MIGRATING) {
-			mlog(ML_ERROR, "sent AST to node %u, it returned "
-			     "DLM_MIGRATING!\n", lock->ml.node);
-			BUG();
-		} else if (status != DLM_NORMAL && status != DLM_IVLOCKID) {
-			mlog(ML_ERROR, "AST to node %u returned %d!\n",
-			     lock->ml.node, status);
-			/* ignore it */
-		}
-		ret = 0;
-	}
-	return ret;
-}