1 files changed, 0 insertions, 538 deletions

diff --git a/ANDROID_3.4.5/fs/ocfs2/slot_map.c b/ANDROID_3.4.5/fs/ocfs2/slot_map.c
deleted file mode 100644
index 1424c151..00000000
--- a/ANDROID_3.4.5/fs/ocfs2/slot_map.c
+++ /dev/null
@@ -1,538 +0,0 @@
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * slot_map.c
- *
- *
- *
- * Copyright (C) 2002, 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 <cluster/masklog.h>
-
-#include "ocfs2.h"
-
-#include "dlmglue.h"
-#include "extent_map.h"
-#include "heartbeat.h"
-#include "inode.h"
-#include "slot_map.h"
-#include "super.h"
-#include "sysfile.h"
-#include "ocfs2_trace.h"
-
-#include "buffer_head_io.h"
-
-
-struct ocfs2_slot {
-	int sl_valid;
-	unsigned int sl_node_num;
-};
-
-struct ocfs2_slot_info {
-	int si_extended;
-	int si_slots_per_block;
-	struct inode *si_inode;
-	unsigned int si_blocks;
-	struct buffer_head **si_bh;
-	unsigned int si_num_slots;
-	struct ocfs2_slot *si_slots;
-};
-
-
-static int __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
-				    unsigned int node_num);
-
-static void ocfs2_invalidate_slot(struct ocfs2_slot_info *si,
-				  int slot_num)
-{
-	BUG_ON((slot_num < 0) || (slot_num >= si->si_num_slots));
-	si->si_slots[slot_num].sl_valid = 0;
-}
-
-static void ocfs2_set_slot(struct ocfs2_slot_info *si,
-			   int slot_num, unsigned int node_num)
-{
-	BUG_ON((slot_num < 0) || (slot_num >= si->si_num_slots));
-
-	si->si_slots[slot_num].sl_valid = 1;
-	si->si_slots[slot_num].sl_node_num = node_num;
-}
-
-/* This version is for the extended slot map */
-static void ocfs2_update_slot_info_extended(struct ocfs2_slot_info *si)
-{
-	int b, i, slotno;
-	struct ocfs2_slot_map_extended *se;
-
-	slotno = 0;
-	for (b = 0; b < si->si_blocks; b++) {
-		se = (struct ocfs2_slot_map_extended *)si->si_bh[b]->b_data;
-		for (i = 0;
-		     (i < si->si_slots_per_block) &&
-		     (slotno < si->si_num_slots);
-		     i++, slotno++) {
-			if (se->se_slots[i].es_valid)
-				ocfs2_set_slot(si, slotno,
-					       le32_to_cpu(se->se_slots[i].es_node_num));
-			else
-				ocfs2_invalidate_slot(si, slotno);
-		}
-	}
-}
-
-/*
- * Post the slot information on disk into our slot_info struct.
- * Must be protected by osb_lock.
- */
-static void ocfs2_update_slot_info_old(struct ocfs2_slot_info *si)
-{
-	int i;
-	struct ocfs2_slot_map *sm;
-
-	sm = (struct ocfs2_slot_map *)si->si_bh[0]->b_data;
-
-	for (i = 0; i < si->si_num_slots; i++) {
-		if (le16_to_cpu(sm->sm_slots[i]) == (u16)OCFS2_INVALID_SLOT)
-			ocfs2_invalidate_slot(si, i);
-		else
-			ocfs2_set_slot(si, i, le16_to_cpu(sm->sm_slots[i]));
-	}
-}
-
-static void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
-{
-	/*
-	 * The slot data will have been refreshed when ocfs2_super_lock
-	 * was taken.
-	 */
-	if (si->si_extended)
-		ocfs2_update_slot_info_extended(si);
-	else
-		ocfs2_update_slot_info_old(si);
-}
-
-int ocfs2_refresh_slot_info(struct ocfs2_super *osb)
-{
-	int ret;
-	struct ocfs2_slot_info *si = osb->slot_info;
-
-	if (si == NULL)
-		return 0;
-
-	BUG_ON(si->si_blocks == 0);
-	BUG_ON(si->si_bh == NULL);
-
-	trace_ocfs2_refresh_slot_info(si->si_blocks);
-
-	/*
-	 * We pass -1 as blocknr because we expect all of si->si_bh to
-	 * be !NULL.  Thus, ocfs2_read_blocks() will ignore blocknr.  If
-	 * this is not true, the read of -1 (UINT64_MAX) will fail.
-	 */
-	ret = ocfs2_read_blocks(INODE_CACHE(si->si_inode), -1, si->si_blocks,
-				si->si_bh, OCFS2_BH_IGNORE_CACHE, NULL);
-	if (ret == 0) {
-		spin_lock(&osb->osb_lock);
-		ocfs2_update_slot_info(si);
-		spin_unlock(&osb->osb_lock);
-	}
-
-	return ret;
-}
-
-/* post the our slot info stuff into it's destination bh and write it
- * out. */
-static void ocfs2_update_disk_slot_extended(struct ocfs2_slot_info *si,
-					    int slot_num,
-					    struct buffer_head **bh)
-{
-	int blkind = slot_num / si->si_slots_per_block;
-	int slotno = slot_num % si->si_slots_per_block;
-	struct ocfs2_slot_map_extended *se;
-
-	BUG_ON(blkind >= si->si_blocks);
-
-	se = (struct ocfs2_slot_map_extended *)si->si_bh[blkind]->b_data;
-	se->se_slots[slotno].es_valid = si->si_slots[slot_num].sl_valid;
-	if (si->si_slots[slot_num].sl_valid)
-		se->se_slots[slotno].es_node_num =
-			cpu_to_le32(si->si_slots[slot_num].sl_node_num);
-	*bh = si->si_bh[blkind];
-}
-
-static void ocfs2_update_disk_slot_old(struct ocfs2_slot_info *si,
-				       int slot_num,
-				       struct buffer_head **bh)
-{
-	int i;
-	struct ocfs2_slot_map *sm;
-
-	sm = (struct ocfs2_slot_map *)si->si_bh[0]->b_data;
-	for (i = 0; i < si->si_num_slots; i++) {
-		if (si->si_slots[i].sl_valid)
-			sm->sm_slots[i] =
-				cpu_to_le16(si->si_slots[i].sl_node_num);
-		else
-			sm->sm_slots[i] = cpu_to_le16(OCFS2_INVALID_SLOT);
-	}
-	*bh = si->si_bh[0];
-}
-
-static int ocfs2_update_disk_slot(struct ocfs2_super *osb,
-				  struct ocfs2_slot_info *si,
-				  int slot_num)
-{
-	int status;
-	struct buffer_head *bh;
-
-	spin_lock(&osb->osb_lock);
-	if (si->si_extended)
-		ocfs2_update_disk_slot_extended(si, slot_num, &bh);
-	else
-		ocfs2_update_disk_slot_old(si, slot_num, &bh);
-	spin_unlock(&osb->osb_lock);
-
-	status = ocfs2_write_block(osb, bh, INODE_CACHE(si->si_inode));
-	if (status < 0)
-		mlog_errno(status);
-
-	return status;
-}
-
-/*
- * Calculate how many bytes are needed by the slot map.  Returns
- * an error if the slot map file is too small.
- */
-static int ocfs2_slot_map_physical_size(struct ocfs2_super *osb,
-					struct inode *inode,
-					unsigned long long *bytes)
-{
-	unsigned long long bytes_needed;
-
-	if (ocfs2_uses_extended_slot_map(osb)) {
-		bytes_needed = osb->max_slots *
-			sizeof(struct ocfs2_extended_slot);
-	} else {
-		bytes_needed = osb->max_slots * sizeof(__le16);
-	}
-	if (bytes_needed > i_size_read(inode)) {
-		mlog(ML_ERROR,
-		     "Slot map file is too small!  (size %llu, needed %llu)\n",
-		     i_size_read(inode), bytes_needed);
-		return -ENOSPC;
-	}
-
-	*bytes = bytes_needed;
-	return 0;
-}
-
-/* try to find global node in the slot info. Returns -ENOENT
- * if nothing is found. */
-static int __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
-				    unsigned int node_num)
-{
-	int i, ret = -ENOENT;
-
-	for(i = 0; i < si->si_num_slots; i++) {
-		if (si->si_slots[i].sl_valid &&
-		    (node_num == si->si_slots[i].sl_node_num)) {
-			ret = i;
-			break;
-		}
-	}
-
-	return ret;
-}
-
-static int __ocfs2_find_empty_slot(struct ocfs2_slot_info *si,
-				   int preferred)
-{
-	int i, ret = -ENOSPC;
-
-	if ((preferred >= 0) && (preferred < si->si_num_slots)) {
-		if (!si->si_slots[preferred].sl_valid) {
-			ret = preferred;
-			goto out;
-		}
-	}
-
-	for(i = 0; i < si->si_num_slots; i++) {
-		if (!si->si_slots[i].sl_valid) {
-			ret = i;
-			break;
-		}
-	}
-out:
-	return ret;
-}
-
-int ocfs2_node_num_to_slot(struct ocfs2_super *osb, unsigned int node_num)
-{
-	int slot;
-	struct ocfs2_slot_info *si = osb->slot_info;
-
-	spin_lock(&osb->osb_lock);
-	slot = __ocfs2_node_num_to_slot(si, node_num);
-	spin_unlock(&osb->osb_lock);
-
-	return slot;
-}
-
-int ocfs2_slot_to_node_num_locked(struct ocfs2_super *osb, int slot_num,
-				  unsigned int *node_num)
-{
-	struct ocfs2_slot_info *si = osb->slot_info;
-
-	assert_spin_locked(&osb->osb_lock);
-
-	BUG_ON(slot_num < 0);
-	BUG_ON(slot_num > osb->max_slots);
-
-	if (!si->si_slots[slot_num].sl_valid)
-		return -ENOENT;
-
-	*node_num = si->si_slots[slot_num].sl_node_num;
-	return 0;
-}
-
-static void __ocfs2_free_slot_info(struct ocfs2_slot_info *si)
-{
-	unsigned int i;
-
-	if (si == NULL)
-		return;
-
-	if (si->si_inode)
-		iput(si->si_inode);
-	if (si->si_bh) {
-		for (i = 0; i < si->si_blocks; i++) {
-			if (si->si_bh[i]) {
-				brelse(si->si_bh[i]);
-				si->si_bh[i] = NULL;
-			}
-		}
-		kfree(si->si_bh);
-	}
-
-	kfree(si);
-}
-
-int ocfs2_clear_slot(struct ocfs2_super *osb, int slot_num)
-{
-	struct ocfs2_slot_info *si = osb->slot_info;
-
-	if (si == NULL)
-		return 0;
-
-	spin_lock(&osb->osb_lock);
-	ocfs2_invalidate_slot(si, slot_num);
-	spin_unlock(&osb->osb_lock);
-
-	return ocfs2_update_disk_slot(osb, osb->slot_info, slot_num);
-}
-
-static int ocfs2_map_slot_buffers(struct ocfs2_super *osb,
-				  struct ocfs2_slot_info *si)
-{
-	int status = 0;
-	u64 blkno;
-	unsigned long long blocks, bytes = 0;
-	unsigned int i;
-	struct buffer_head *bh;
-
-	status = ocfs2_slot_map_physical_size(osb, si->si_inode, &bytes);
-	if (status)
-		goto bail;
-
-	blocks = ocfs2_blocks_for_bytes(si->si_inode->i_sb, bytes);
-	BUG_ON(blocks > UINT_MAX);
-	si->si_blocks = blocks;
-	if (!si->si_blocks)
-		goto bail;
-
-	if (si->si_extended)
-		si->si_slots_per_block =
-			(osb->sb->s_blocksize /
-			 sizeof(struct ocfs2_extended_slot));
-	else
-		si->si_slots_per_block = osb->sb->s_blocksize / sizeof(__le16);
-
-	/* The size checks above should ensure this */
-	BUG_ON((osb->max_slots / si->si_slots_per_block) > blocks);
-
-	trace_ocfs2_map_slot_buffers(bytes, si->si_blocks);
-
-	si->si_bh = kzalloc(sizeof(struct buffer_head *) * si->si_blocks,
-			    GFP_KERNEL);
-	if (!si->si_bh) {
-		status = -ENOMEM;
-		mlog_errno(status);
-		goto bail;
-	}
-
-	for (i = 0; i < si->si_blocks; i++) {
-		status = ocfs2_extent_map_get_blocks(si->si_inode, i,
-						     &blkno, NULL, NULL);
-		if (status < 0) {
-			mlog_errno(status);
-			goto bail;
-		}
-
-		trace_ocfs2_map_slot_buffers_block((unsigned long long)blkno, i);
-
-		bh = NULL;  /* Acquire a fresh bh */
-		status = ocfs2_read_blocks(INODE_CACHE(si->si_inode), blkno,
-					   1, &bh, OCFS2_BH_IGNORE_CACHE, NULL);
-		if (status < 0) {
-			mlog_errno(status);
-			goto bail;
-		}
-
-		si->si_bh[i] = bh;
-	}
-
-bail:
-	return status;
-}
-
-int ocfs2_init_slot_info(struct ocfs2_super *osb)
-{
-	int status;
-	struct inode *inode = NULL;
-	struct ocfs2_slot_info *si;
-
-	si = kzalloc(sizeof(struct ocfs2_slot_info) +
-		     (sizeof(struct ocfs2_slot) * osb->max_slots),
-		     GFP_KERNEL);
-	if (!si) {
-		status = -ENOMEM;
-		mlog_errno(status);
-		goto bail;
-	}
-
-	si->si_extended = ocfs2_uses_extended_slot_map(osb);
-	si->si_num_slots = osb->max_slots;
-	si->si_slots = (struct ocfs2_slot *)((char *)si +
-					     sizeof(struct ocfs2_slot_info));
-
-	inode = ocfs2_get_system_file_inode(osb, SLOT_MAP_SYSTEM_INODE,
-					    OCFS2_INVALID_SLOT);
-	if (!inode) {
-		status = -EINVAL;
-		mlog_errno(status);
-		goto bail;
-	}
-
-	si->si_inode = inode;
-	status = ocfs2_map_slot_buffers(osb, si);
-	if (status < 0) {
-		mlog_errno(status);
-		goto bail;
-	}
-
-	osb->slot_info = (struct ocfs2_slot_info *)si;
-bail:
-	if (status < 0 && si)
-		__ocfs2_free_slot_info(si);
-
-	return status;
-}
-
-void ocfs2_free_slot_info(struct ocfs2_super *osb)
-{
-	struct ocfs2_slot_info *si = osb->slot_info;
-
-	osb->slot_info = NULL;
-	__ocfs2_free_slot_info(si);
-}
-
-int ocfs2_find_slot(struct ocfs2_super *osb)
-{
-	int status;
-	int slot;
-	struct ocfs2_slot_info *si;
-
-	si = osb->slot_info;
-
-	spin_lock(&osb->osb_lock);
-	ocfs2_update_slot_info(si);
-
-	/* search for ourselves first and take the slot if it already
-	 * exists. Perhaps we need to mark this in a variable for our
-	 * own journal recovery? Possibly not, though we certainly
-	 * need to warn to the user */
-	slot = __ocfs2_node_num_to_slot(si, osb->node_num);
-	if (slot < 0) {
-		/* if no slot yet, then just take 1st available
-		 * one. */
-		slot = __ocfs2_find_empty_slot(si, osb->preferred_slot);
-		if (slot < 0) {
-			spin_unlock(&osb->osb_lock);
-			mlog(ML_ERROR, "no free slots available!\n");
-			status = -EINVAL;
-			goto bail;
-		}
-	} else
-		printk(KERN_INFO "ocfs2: Slot %d on device (%s) was already "
-		       "allocated to this node!\n", slot, osb->dev_str);
-
-	ocfs2_set_slot(si, slot, osb->node_num);
-	osb->slot_num = slot;
-	spin_unlock(&osb->osb_lock);
-
-	trace_ocfs2_find_slot(osb->slot_num);
-
-	status = ocfs2_update_disk_slot(osb, si, osb->slot_num);
-	if (status < 0)
-		mlog_errno(status);
-
-bail:
-	return status;
-}
-
-void ocfs2_put_slot(struct ocfs2_super *osb)
-{
-	int status, slot_num;
-	struct ocfs2_slot_info *si = osb->slot_info;
-
-	if (!si)
-		return;
-
-	spin_lock(&osb->osb_lock);
-	ocfs2_update_slot_info(si);
-
-	slot_num = osb->slot_num;
-	ocfs2_invalidate_slot(si, osb->slot_num);
-	osb->slot_num = OCFS2_INVALID_SLOT;
-	spin_unlock(&osb->osb_lock);
-
-	status = ocfs2_update_disk_slot(osb, si, slot_num);
-	if (status < 0) {
-		mlog_errno(status);
-		goto bail;
-	}
-
-bail:
-	ocfs2_free_slot_info(osb);
-}
-