1 files changed, 0 insertions, 589 deletions

diff --git a/ANDROID_3.4.5/fs/ocfs2/resize.c b/ANDROID_3.4.5/fs/ocfs2/resize.c
deleted file mode 100644
index ec55add7..00000000
--- a/ANDROID_3.4.5/fs/ocfs2/resize.c
+++ /dev/null
@@ -1,589 +0,0 @@
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * resize.c
- *
- * volume resize.
- * Inspired by ext3/resize.c.
- *
- * Copyright (C) 2007 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/fs.h>
-#include <linux/types.h>
-
-#include <cluster/masklog.h>
-
-#include "ocfs2.h"
-
-#include "alloc.h"
-#include "dlmglue.h"
-#include "inode.h"
-#include "journal.h"
-#include "super.h"
-#include "sysfile.h"
-#include "uptodate.h"
-#include "ocfs2_trace.h"
-
-#include "buffer_head_io.h"
-#include "suballoc.h"
-#include "resize.h"
-
-/*
- * Check whether there are new backup superblocks exist
- * in the last group. If there are some, mark them or clear
- * them in the bitmap.
- *
- * Return how many backups we find in the last group.
- */
-static u16 ocfs2_calc_new_backup_super(struct inode *inode,
-				       struct ocfs2_group_desc *gd,
-				       int new_clusters,
-				       u32 first_new_cluster,
-				       u16 cl_cpg,
-				       int set)
-{
-	int i;
-	u16 backups = 0;
-	u32 cluster;
-	u64 blkno, gd_blkno, lgd_blkno = le64_to_cpu(gd->bg_blkno);
-
-	for (i = 0; i < OCFS2_MAX_BACKUP_SUPERBLOCKS; i++) {
-		blkno = ocfs2_backup_super_blkno(inode->i_sb, i);
-		cluster = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
-
-		gd_blkno = ocfs2_which_cluster_group(inode, cluster);
-		if (gd_blkno < lgd_blkno)
-			continue;
-		else if (gd_blkno > lgd_blkno)
-			break;
-
-		if (set)
-			ocfs2_set_bit(cluster % cl_cpg,
-				      (unsigned long *)gd->bg_bitmap);
-		else
-			ocfs2_clear_bit(cluster % cl_cpg,
-					(unsigned long *)gd->bg_bitmap);
-		backups++;
-	}
-
-	return backups;
-}
-
-static int ocfs2_update_last_group_and_inode(handle_t *handle,
-					     struct inode *bm_inode,
-					     struct buffer_head *bm_bh,
-					     struct buffer_head *group_bh,
-					     u32 first_new_cluster,
-					     int new_clusters)
-{
-	int ret = 0;
-	struct ocfs2_super *osb = OCFS2_SB(bm_inode->i_sb);
-	struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bm_bh->b_data;
-	struct ocfs2_chain_list *cl = &fe->id2.i_chain;
-	struct ocfs2_chain_rec *cr;
-	struct ocfs2_group_desc *group;
-	u16 chain, num_bits, backups = 0;
-	u16 cl_bpc = le16_to_cpu(cl->cl_bpc);
-	u16 cl_cpg = le16_to_cpu(cl->cl_cpg);
-
-	trace_ocfs2_update_last_group_and_inode(new_clusters,
-						first_new_cluster);
-
-	ret = ocfs2_journal_access_gd(handle, INODE_CACHE(bm_inode),
-				      group_bh, OCFS2_JOURNAL_ACCESS_WRITE);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out;
-	}
-
-	group = (struct ocfs2_group_desc *)group_bh->b_data;
-
-	/* update the group first. */
-	num_bits = new_clusters * cl_bpc;
-	le16_add_cpu(&group->bg_bits, num_bits);
-	le16_add_cpu(&group->bg_free_bits_count, num_bits);
-
-	/*
-	 * check whether there are some new backup superblocks exist in
-	 * this group and update the group bitmap accordingly.
-	 */
-	if (OCFS2_HAS_COMPAT_FEATURE(osb->sb,
-				     OCFS2_FEATURE_COMPAT_BACKUP_SB)) {
-		backups = ocfs2_calc_new_backup_super(bm_inode,
-						     group,
-						     new_clusters,
-						     first_new_cluster,
-						     cl_cpg, 1);
-		le16_add_cpu(&group->bg_free_bits_count, -1 * backups);
-	}
-
-	ocfs2_journal_dirty(handle, group_bh);
-
-	/* update the inode accordingly. */
-	ret = ocfs2_journal_access_di(handle, INODE_CACHE(bm_inode), bm_bh,
-				      OCFS2_JOURNAL_ACCESS_WRITE);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out_rollback;
-	}
-
-	chain = le16_to_cpu(group->bg_chain);
-	cr = (&cl->cl_recs[chain]);
-	le32_add_cpu(&cr->c_total, num_bits);
-	le32_add_cpu(&cr->c_free, num_bits);
-	le32_add_cpu(&fe->id1.bitmap1.i_total, num_bits);
-	le32_add_cpu(&fe->i_clusters, new_clusters);
-
-	if (backups) {
-		le32_add_cpu(&cr->c_free, -1 * backups);
-		le32_add_cpu(&fe->id1.bitmap1.i_used, backups);
-	}
-
-	spin_lock(&OCFS2_I(bm_inode)->ip_lock);
-	OCFS2_I(bm_inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
-	le64_add_cpu(&fe->i_size, new_clusters << osb->s_clustersize_bits);
-	spin_unlock(&OCFS2_I(bm_inode)->ip_lock);
-	i_size_write(bm_inode, le64_to_cpu(fe->i_size));
-
-	ocfs2_journal_dirty(handle, bm_bh);
-
-out_rollback:
-	if (ret < 0) {
-		ocfs2_calc_new_backup_super(bm_inode,
-					    group,
-					    new_clusters,
-					    first_new_cluster,
-					    cl_cpg, 0);
-		le16_add_cpu(&group->bg_free_bits_count, backups);
-		le16_add_cpu(&group->bg_bits, -1 * num_bits);
-		le16_add_cpu(&group->bg_free_bits_count, -1 * num_bits);
-	}
-out:
-	if (ret)
-		mlog_errno(ret);
-	return ret;
-}
-
-static int update_backups(struct inode * inode, u32 clusters, char *data)
-{
-	int i, ret = 0;
-	u32 cluster;
-	u64 blkno;
-	struct buffer_head *backup = NULL;
-	struct ocfs2_dinode *backup_di = NULL;
-	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-
-	/* calculate the real backups we need to update. */
-	for (i = 0; i < OCFS2_MAX_BACKUP_SUPERBLOCKS; i++) {
-		blkno = ocfs2_backup_super_blkno(inode->i_sb, i);
-		cluster = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
-		if (cluster > clusters)
-			break;
-
-		ret = ocfs2_read_blocks_sync(osb, blkno, 1, &backup);
-		if (ret < 0) {
-			mlog_errno(ret);
-			break;
-		}
-
-		memcpy(backup->b_data, data, inode->i_sb->s_blocksize);
-
-		backup_di = (struct ocfs2_dinode *)backup->b_data;
-		backup_di->i_blkno = cpu_to_le64(blkno);
-
-		ret = ocfs2_write_super_or_backup(osb, backup);
-		brelse(backup);
-		backup = NULL;
-		if (ret < 0) {
-			mlog_errno(ret);
-			break;
-		}
-	}
-
-	return ret;
-}
-
-static void ocfs2_update_super_and_backups(struct inode *inode,
-					   int new_clusters)
-{
-	int ret;
-	u32 clusters = 0;
-	struct buffer_head *super_bh = NULL;
-	struct ocfs2_dinode *super_di = NULL;
-	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-
-	/*
-	 * update the superblock last.
-	 * It doesn't matter if the write failed.
-	 */
-	ret = ocfs2_read_blocks_sync(osb, OCFS2_SUPER_BLOCK_BLKNO, 1,
-				     &super_bh);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out;
-	}
-
-	super_di = (struct ocfs2_dinode *)super_bh->b_data;
-	le32_add_cpu(&super_di->i_clusters, new_clusters);
-	clusters = le32_to_cpu(super_di->i_clusters);
-
-	ret = ocfs2_write_super_or_backup(osb, super_bh);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out;
-	}
-
-	if (OCFS2_HAS_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_COMPAT_BACKUP_SB))
-		ret = update_backups(inode, clusters, super_bh->b_data);
-
-out:
-	brelse(super_bh);
-	if (ret)
-		printk(KERN_WARNING "ocfs2: Failed to update super blocks on %s"
-			" during fs resize. This condition is not fatal,"
-			" but fsck.ocfs2 should be run to fix it\n",
-			osb->dev_str);
-	return;
-}
-
-/*
- * Extend the filesystem to the new number of clusters specified.  This entry
- * point is only used to extend the current filesystem to the end of the last
- * existing group.
- */
-int ocfs2_group_extend(struct inode * inode, int new_clusters)
-{
-	int ret;
-	handle_t *handle;
-	struct buffer_head *main_bm_bh = NULL;
-	struct buffer_head *group_bh = NULL;
-	struct inode *main_bm_inode = NULL;
-	struct ocfs2_dinode *fe = NULL;
-	struct ocfs2_group_desc *group = NULL;
-	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-	u16 cl_bpc;
-	u32 first_new_cluster;
-	u64 lgd_blkno;
-
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
-		return -EROFS;
-
-	if (new_clusters < 0)
-		return -EINVAL;
-	else if (new_clusters == 0)
-		return 0;
-
-	main_bm_inode = ocfs2_get_system_file_inode(osb,
-						    GLOBAL_BITMAP_SYSTEM_INODE,
-						    OCFS2_INVALID_SLOT);
-	if (!main_bm_inode) {
-		ret = -EINVAL;
-		mlog_errno(ret);
-		goto out;
-	}
-
-	mutex_lock(&main_bm_inode->i_mutex);
-
-	ret = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out_mutex;
-	}
-
-	fe = (struct ocfs2_dinode *)main_bm_bh->b_data;
-
-	/* main_bm_bh is validated by inode read inside ocfs2_inode_lock(),
-	 * so any corruption is a code bug. */
-	BUG_ON(!OCFS2_IS_VALID_DINODE(fe));
-
-	if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
-		ocfs2_group_bitmap_size(osb->sb, 0,
-					osb->s_feature_incompat) * 8) {
-		mlog(ML_ERROR, "The disk is too old and small. "
-		     "Force to do offline resize.");
-		ret = -EINVAL;
-		goto out_unlock;
-	}
-
-	first_new_cluster = le32_to_cpu(fe->i_clusters);
-	lgd_blkno = ocfs2_which_cluster_group(main_bm_inode,
-					      first_new_cluster - 1);
-
-	ret = ocfs2_read_group_descriptor(main_bm_inode, fe, lgd_blkno,
-					  &group_bh);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out_unlock;
-	}
-	group = (struct ocfs2_group_desc *)group_bh->b_data;
-
-	cl_bpc = le16_to_cpu(fe->id2.i_chain.cl_bpc);
-	if (le16_to_cpu(group->bg_bits) / cl_bpc + new_clusters >
-		le16_to_cpu(fe->id2.i_chain.cl_cpg)) {
-		ret = -EINVAL;
-		goto out_unlock;
-	}
-
-
-	trace_ocfs2_group_extend(
-	     (unsigned long long)le64_to_cpu(group->bg_blkno), new_clusters);
-
-	handle = ocfs2_start_trans(osb, OCFS2_GROUP_EXTEND_CREDITS);
-	if (IS_ERR(handle)) {
-		mlog_errno(PTR_ERR(handle));
-		ret = -EINVAL;
-		goto out_unlock;
-	}
-
-	/* update the last group descriptor and inode. */
-	ret = ocfs2_update_last_group_and_inode(handle, main_bm_inode,
-						main_bm_bh, group_bh,
-						first_new_cluster,
-						new_clusters);
-	if (ret) {
-		mlog_errno(ret);
-		goto out_commit;
-	}
-
-	ocfs2_update_super_and_backups(main_bm_inode, new_clusters);
-
-out_commit:
-	ocfs2_commit_trans(osb, handle);
-out_unlock:
-	brelse(group_bh);
-	brelse(main_bm_bh);
-
-	ocfs2_inode_unlock(main_bm_inode, 1);
-
-out_mutex:
-	mutex_unlock(&main_bm_inode->i_mutex);
-	iput(main_bm_inode);
-
-out:
-	return ret;
-}
-
-static int ocfs2_check_new_group(struct inode *inode,
-				 struct ocfs2_dinode *di,
-				 struct ocfs2_new_group_input *input,
-				 struct buffer_head *group_bh)
-{
-	int ret;
-	struct ocfs2_group_desc *gd =
-		(struct ocfs2_group_desc *)group_bh->b_data;
-	u16 cl_bpc = le16_to_cpu(di->id2.i_chain.cl_bpc);
-
-	ret = ocfs2_check_group_descriptor(inode->i_sb, di, group_bh);
-	if (ret)
-		goto out;
-
-	ret = -EINVAL;
-	if (le16_to_cpu(gd->bg_chain) != input->chain)
-		mlog(ML_ERROR, "Group descriptor # %llu has bad chain %u "
-		     "while input has %u set.\n",
-		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
-		     le16_to_cpu(gd->bg_chain), input->chain);
-	else if (le16_to_cpu(gd->bg_bits) != input->clusters * cl_bpc)
-		mlog(ML_ERROR, "Group descriptor # %llu has bit count %u but "
-		     "input has %u clusters set\n",
-		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
-		     le16_to_cpu(gd->bg_bits), input->clusters);
-	else if (le16_to_cpu(gd->bg_free_bits_count) != input->frees * cl_bpc)
-		mlog(ML_ERROR, "Group descriptor # %llu has free bit count %u "
-		     "but it should have %u set\n",
-		     (unsigned long long)le64_to_cpu(gd->bg_blkno),
-		     le16_to_cpu(gd->bg_bits),
-		     input->frees * cl_bpc);
-	else
-		ret = 0;
-
-out:
-	return ret;
-}
-
-static int ocfs2_verify_group_and_input(struct inode *inode,
-					struct ocfs2_dinode *di,
-					struct ocfs2_new_group_input *input,
-					struct buffer_head *group_bh)
-{
-	u16 cl_count = le16_to_cpu(di->id2.i_chain.cl_count);
-	u16 cl_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg);
-	u16 next_free = le16_to_cpu(di->id2.i_chain.cl_next_free_rec);
-	u32 cluster = ocfs2_blocks_to_clusters(inode->i_sb, input->group);
-	u32 total_clusters = le32_to_cpu(di->i_clusters);
-	int ret = -EINVAL;
-
-	if (cluster < total_clusters)
-		mlog(ML_ERROR, "add a group which is in the current volume.\n");
-	else if (input->chain >= cl_count)
-		mlog(ML_ERROR, "input chain exceeds the limit.\n");
-	else if (next_free != cl_count && next_free != input->chain)
-		mlog(ML_ERROR,
-		     "the add group should be in chain %u\n", next_free);
-	else if (total_clusters + input->clusters < total_clusters)
-		mlog(ML_ERROR, "add group's clusters overflow.\n");
-	else if (input->clusters > cl_cpg)
-		mlog(ML_ERROR, "the cluster exceeds the maximum of a group\n");
-	else if (input->frees > input->clusters)
-		mlog(ML_ERROR, "the free cluster exceeds the total clusters\n");
-	else if (total_clusters % cl_cpg != 0)
-		mlog(ML_ERROR,
-		     "the last group isn't full. Use group extend first.\n");
-	else if (input->group != ocfs2_which_cluster_group(inode, cluster))
-		mlog(ML_ERROR, "group blkno is invalid\n");
-	else if ((ret = ocfs2_check_new_group(inode, di, input, group_bh)))
-		mlog(ML_ERROR, "group descriptor check failed.\n");
-	else
-		ret = 0;
-
-	return ret;
-}
-
-/* Add a new group descriptor to global_bitmap. */
-int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
-{
-	int ret;
-	handle_t *handle;
-	struct buffer_head *main_bm_bh = NULL;
-	struct inode *main_bm_inode = NULL;
-	struct ocfs2_dinode *fe = NULL;
-	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-	struct buffer_head *group_bh = NULL;
-	struct ocfs2_group_desc *group = NULL;
-	struct ocfs2_chain_list *cl;
-	struct ocfs2_chain_rec *cr;
-	u16 cl_bpc;
-
-	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
-		return -EROFS;
-
-	main_bm_inode = ocfs2_get_system_file_inode(osb,
-						    GLOBAL_BITMAP_SYSTEM_INODE,
-						    OCFS2_INVALID_SLOT);
-	if (!main_bm_inode) {
-		ret = -EINVAL;
-		mlog_errno(ret);
-		goto out;
-	}
-
-	mutex_lock(&main_bm_inode->i_mutex);
-
-	ret = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out_mutex;
-	}
-
-	fe = (struct ocfs2_dinode *)main_bm_bh->b_data;
-
-	if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
-		ocfs2_group_bitmap_size(osb->sb, 0,
-					osb->s_feature_incompat) * 8) {
-		mlog(ML_ERROR, "The disk is too old and small."
-		     " Force to do offline resize.");
-		ret = -EINVAL;
-		goto out_unlock;
-	}
-
-	ret = ocfs2_read_blocks_sync(osb, input->group, 1, &group_bh);
-	if (ret < 0) {
-		mlog(ML_ERROR, "Can't read the group descriptor # %llu "
-		     "from the device.", (unsigned long long)input->group);
-		goto out_unlock;
-	}
-
-	ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), group_bh);
-
-	ret = ocfs2_verify_group_and_input(main_bm_inode, fe, input, group_bh);
-	if (ret) {
-		mlog_errno(ret);
-		goto out_unlock;
-	}
-
-	trace_ocfs2_group_add((unsigned long long)input->group,
-			       input->chain, input->clusters, input->frees);
-
-	handle = ocfs2_start_trans(osb, OCFS2_GROUP_ADD_CREDITS);
-	if (IS_ERR(handle)) {
-		mlog_errno(PTR_ERR(handle));
-		ret = -EINVAL;
-		goto out_unlock;
-	}
-
-	cl_bpc = le16_to_cpu(fe->id2.i_chain.cl_bpc);
-	cl = &fe->id2.i_chain;
-	cr = &cl->cl_recs[input->chain];
-
-	ret = ocfs2_journal_access_gd(handle, INODE_CACHE(main_bm_inode),
-				      group_bh, OCFS2_JOURNAL_ACCESS_WRITE);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out_commit;
-	}
-
-	group = (struct ocfs2_group_desc *)group_bh->b_data;
-	group->bg_next_group = cr->c_blkno;
-	ocfs2_journal_dirty(handle, group_bh);
-
-	ret = ocfs2_journal_access_di(handle, INODE_CACHE(main_bm_inode),
-				      main_bm_bh, OCFS2_JOURNAL_ACCESS_WRITE);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out_commit;
-	}
-
-	if (input->chain == le16_to_cpu(cl->cl_next_free_rec)) {
-		le16_add_cpu(&cl->cl_next_free_rec, 1);
-		memset(cr, 0, sizeof(struct ocfs2_chain_rec));
-	}
-
-	cr->c_blkno = cpu_to_le64(input->group);
-	le32_add_cpu(&cr->c_total, input->clusters * cl_bpc);
-	le32_add_cpu(&cr->c_free, input->frees * cl_bpc);
-
-	le32_add_cpu(&fe->id1.bitmap1.i_total, input->clusters *cl_bpc);
-	le32_add_cpu(&fe->id1.bitmap1.i_used,
-		     (input->clusters - input->frees) * cl_bpc);
-	le32_add_cpu(&fe->i_clusters, input->clusters);
-
-	ocfs2_journal_dirty(handle, main_bm_bh);
-
-	spin_lock(&OCFS2_I(main_bm_inode)->ip_lock);
-	OCFS2_I(main_bm_inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
-	le64_add_cpu(&fe->i_size, input->clusters << osb->s_clustersize_bits);
-	spin_unlock(&OCFS2_I(main_bm_inode)->ip_lock);
-	i_size_write(main_bm_inode, le64_to_cpu(fe->i_size));
-
-	ocfs2_update_super_and_backups(main_bm_inode, input->clusters);
-
-out_commit:
-	ocfs2_commit_trans(osb, handle);
-out_unlock:
-	brelse(group_bh);
-	brelse(main_bm_bh);
-
-	ocfs2_inode_unlock(main_bm_inode, 1);
-
-out_mutex:
-	mutex_unlock(&main_bm_inode->i_mutex);
-	iput(main_bm_inode);
-
-out:
-	return ret;
-}