Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 604 deletions

diff --git a/ANDROID_3.4.5/fs/ext4/migrate.c b/ANDROID_3.4.5/fs/ext4/migrate.c
deleted file mode 100644
index f39f80f8..00000000
--- a/ANDROID_3.4.5/fs/ext4/migrate.c
+++ /dev/null
@@ -1,604 +0,0 @@
-/*
- * Copyright IBM Corporation, 2007
- * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2.1 of the GNU Lesser General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- */
-
-#include <linux/slab.h>
-#include "ext4_jbd2.h"
-
-/*
- * The contiguous blocks details which can be
- * represented by a single extent
- */
-struct migrate_struct {
-	ext4_lblk_t first_block, last_block, curr_block;
-	ext4_fsblk_t first_pblock, last_pblock;
-};
-
-static int finish_range(handle_t *handle, struct inode *inode,
-				struct migrate_struct *lb)
-
-{
-	int retval = 0, needed;
-	struct ext4_extent newext;
-	struct ext4_ext_path *path;
-	if (lb->first_pblock == 0)
-		return 0;
-
-	/* Add the extent to temp inode*/
-	newext.ee_block = cpu_to_le32(lb->first_block);
-	newext.ee_len   = cpu_to_le16(lb->last_block - lb->first_block + 1);
-	ext4_ext_store_pblock(&newext, lb->first_pblock);
-	path = ext4_ext_find_extent(inode, lb->first_block, NULL);
-
-	if (IS_ERR(path)) {
-		retval = PTR_ERR(path);
-		path = NULL;
-		goto err_out;
-	}
-
-	/*
-	 * Calculate the credit needed to inserting this extent
-	 * Since we are doing this in loop we may accumalate extra
-	 * credit. But below we try to not accumalate too much
-	 * of them by restarting the journal.
-	 */
-	needed = ext4_ext_calc_credits_for_single_extent(inode,
-		    lb->last_block - lb->first_block + 1, path);
-
-	/*
-	 * Make sure the credit we accumalated is not really high
-	 */
-	if (needed && ext4_handle_has_enough_credits(handle,
-						EXT4_RESERVE_TRANS_BLOCKS)) {
-		retval = ext4_journal_restart(handle, needed);
-		if (retval)
-			goto err_out;
-	} else if (needed) {
-		retval = ext4_journal_extend(handle, needed);
-		if (retval) {
-			/*
-			 * IF not able to extend the journal restart the journal
-			 */
-			retval = ext4_journal_restart(handle, needed);
-			if (retval)
-				goto err_out;
-		}
-	}
-	retval = ext4_ext_insert_extent(handle, inode, path, &newext, 0);
-err_out:
-	if (path) {
-		ext4_ext_drop_refs(path);
-		kfree(path);
-	}
-	lb->first_pblock = 0;
-	return retval;
-}
-
-static int update_extent_range(handle_t *handle, struct inode *inode,
-			       ext4_fsblk_t pblock, struct migrate_struct *lb)
-{
-	int retval;
-	/*
-	 * See if we can add on to the existing range (if it exists)
-	 */
-	if (lb->first_pblock &&
-		(lb->last_pblock+1 == pblock) &&
-		(lb->last_block+1 == lb->curr_block)) {
-		lb->last_pblock = pblock;
-		lb->last_block = lb->curr_block;
-		lb->curr_block++;
-		return 0;
-	}
-	/*
-	 * Start a new range.
-	 */
-	retval = finish_range(handle, inode, lb);
-	lb->first_pblock = lb->last_pblock = pblock;
-	lb->first_block = lb->last_block = lb->curr_block;
-	lb->curr_block++;
-	return retval;
-}
-
-static int update_ind_extent_range(handle_t *handle, struct inode *inode,
-				   ext4_fsblk_t pblock,
-				   struct migrate_struct *lb)
-{
-	struct buffer_head *bh;
-	__le32 *i_data;
-	int i, retval = 0;
-	unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
-
-	bh = sb_bread(inode->i_sb, pblock);
-	if (!bh)
-		return -EIO;
-
-	i_data = (__le32 *)bh->b_data;
-	for (i = 0; i < max_entries; i++) {
-		if (i_data[i]) {
-			retval = update_extent_range(handle, inode,
-						le32_to_cpu(i_data[i]), lb);
-			if (retval)
-				break;
-		} else {
-			lb->curr_block++;
-		}
-	}
-	put_bh(bh);
-	return retval;
-
-}
-
-static int update_dind_extent_range(handle_t *handle, struct inode *inode,
-				    ext4_fsblk_t pblock,
-				    struct migrate_struct *lb)
-{
-	struct buffer_head *bh;
-	__le32 *i_data;
-	int i, retval = 0;
-	unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
-
-	bh = sb_bread(inode->i_sb, pblock);
-	if (!bh)
-		return -EIO;
-
-	i_data = (__le32 *)bh->b_data;
-	for (i = 0; i < max_entries; i++) {
-		if (i_data[i]) {
-			retval = update_ind_extent_range(handle, inode,
-						le32_to_cpu(i_data[i]), lb);
-			if (retval)
-				break;
-		} else {
-			/* Only update the file block number */
-			lb->curr_block += max_entries;
-		}
-	}
-	put_bh(bh);
-	return retval;
-
-}
-
-static int update_tind_extent_range(handle_t *handle, struct inode *inode,
-				    ext4_fsblk_t pblock,
-				    struct migrate_struct *lb)
-{
-	struct buffer_head *bh;
-	__le32 *i_data;
-	int i, retval = 0;
-	unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
-
-	bh = sb_bread(inode->i_sb, pblock);
-	if (!bh)
-		return -EIO;
-
-	i_data = (__le32 *)bh->b_data;
-	for (i = 0; i < max_entries; i++) {
-		if (i_data[i]) {
-			retval = update_dind_extent_range(handle, inode,
-						le32_to_cpu(i_data[i]), lb);
-			if (retval)
-				break;
-		} else {
-			/* Only update the file block number */
-			lb->curr_block += max_entries * max_entries;
-		}
-	}
-	put_bh(bh);
-	return retval;
-
-}
-
-static int extend_credit_for_blkdel(handle_t *handle, struct inode *inode)
-{
-	int retval = 0, needed;
-
-	if (ext4_handle_has_enough_credits(handle, EXT4_RESERVE_TRANS_BLOCKS+1))
-		return 0;
-	/*
-	 * We are freeing a blocks. During this we touch
-	 * superblock, group descriptor and block bitmap.
-	 * So allocate a credit of 3. We may update
-	 * quota (user and group).
-	 */
-	needed = 3 + EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb);
-
-	if (ext4_journal_extend(handle, needed) != 0)
-		retval = ext4_journal_restart(handle, needed);
-
-	return retval;
-}
-
-static int free_dind_blocks(handle_t *handle,
-				struct inode *inode, __le32 i_data)
-{
-	int i;
-	__le32 *tmp_idata;
-	struct buffer_head *bh;
-	unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
-
-	bh = sb_bread(inode->i_sb, le32_to_cpu(i_data));
-	if (!bh)
-		return -EIO;
-
-	tmp_idata = (__le32 *)bh->b_data;
-	for (i = 0; i < max_entries; i++) {
-		if (tmp_idata[i]) {
-			extend_credit_for_blkdel(handle, inode);
-			ext4_free_blocks(handle, inode, NULL,
-					 le32_to_cpu(tmp_idata[i]), 1,
-					 EXT4_FREE_BLOCKS_METADATA |
-					 EXT4_FREE_BLOCKS_FORGET);
-		}
-	}
-	put_bh(bh);
-	extend_credit_for_blkdel(handle, inode);
-	ext4_free_blocks(handle, inode, NULL, le32_to_cpu(i_data), 1,
-			 EXT4_FREE_BLOCKS_METADATA |
-			 EXT4_FREE_BLOCKS_FORGET);
-	return 0;
-}
-
-static int free_tind_blocks(handle_t *handle,
-				struct inode *inode, __le32 i_data)
-{
-	int i, retval = 0;
-	__le32 *tmp_idata;
-	struct buffer_head *bh;
-	unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
-
-	bh = sb_bread(inode->i_sb, le32_to_cpu(i_data));
-	if (!bh)
-		return -EIO;
-
-	tmp_idata = (__le32 *)bh->b_data;
-	for (i = 0; i < max_entries; i++) {
-		if (tmp_idata[i]) {
-			retval = free_dind_blocks(handle,
-					inode, tmp_idata[i]);
-			if (retval) {
-				put_bh(bh);
-				return retval;
-			}
-		}
-	}
-	put_bh(bh);
-	extend_credit_for_blkdel(handle, inode);
-	ext4_free_blocks(handle, inode, NULL, le32_to_cpu(i_data), 1,
-			 EXT4_FREE_BLOCKS_METADATA |
-			 EXT4_FREE_BLOCKS_FORGET);
-	return 0;
-}
-
-static int free_ind_block(handle_t *handle, struct inode *inode, __le32 *i_data)
-{
-	int retval;
-
-	/* ei->i_data[EXT4_IND_BLOCK] */
-	if (i_data[0]) {
-		extend_credit_for_blkdel(handle, inode);
-		ext4_free_blocks(handle, inode, NULL,
-				le32_to_cpu(i_data[0]), 1,
-				 EXT4_FREE_BLOCKS_METADATA |
-				 EXT4_FREE_BLOCKS_FORGET);
-	}
-
-	/* ei->i_data[EXT4_DIND_BLOCK] */
-	if (i_data[1]) {
-		retval = free_dind_blocks(handle, inode, i_data[1]);
-		if (retval)
-			return retval;
-	}
-
-	/* ei->i_data[EXT4_TIND_BLOCK] */
-	if (i_data[2]) {
-		retval = free_tind_blocks(handle, inode, i_data[2]);
-		if (retval)
-			return retval;
-	}
-	return 0;
-}
-
-static int ext4_ext_swap_inode_data(handle_t *handle, struct inode *inode,
-						struct inode *tmp_inode)
-{
-	int retval;
-	__le32	i_data[3];
-	struct ext4_inode_info *ei = EXT4_I(inode);
-	struct ext4_inode_info *tmp_ei = EXT4_I(tmp_inode);
-
-	/*
-	 * One credit accounted for writing the
-	 * i_data field of the original inode
-	 */
-	retval = ext4_journal_extend(handle, 1);
-	if (retval) {
-		retval = ext4_journal_restart(handle, 1);
-		if (retval)
-			goto err_out;
-	}
-
-	i_data[0] = ei->i_data[EXT4_IND_BLOCK];
-	i_data[1] = ei->i_data[EXT4_DIND_BLOCK];
-	i_data[2] = ei->i_data[EXT4_TIND_BLOCK];
-
-	down_write(&EXT4_I(inode)->i_data_sem);
-	/*
-	 * if EXT4_STATE_EXT_MIGRATE is cleared a block allocation
-	 * happened after we started the migrate. We need to
-	 * fail the migrate
-	 */
-	if (!ext4_test_inode_state(inode, EXT4_STATE_EXT_MIGRATE)) {
-		retval = -EAGAIN;
-		up_write(&EXT4_I(inode)->i_data_sem);
-		goto err_out;
-	} else
-		ext4_clear_inode_state(inode, EXT4_STATE_EXT_MIGRATE);
-	/*
-	 * We have the extent map build with the tmp inode.
-	 * Now copy the i_data across
-	 */
-	ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS);
-	memcpy(ei->i_data, tmp_ei->i_data, sizeof(ei->i_data));
-
-	/*
-	 * Update i_blocks with the new blocks that got
-	 * allocated while adding extents for extent index
-	 * blocks.
-	 *
-	 * While converting to extents we need not
-	 * update the orignal inode i_blocks for extent blocks
-	 * via quota APIs. The quota update happened via tmp_inode already.
-	 */
-	spin_lock(&inode->i_lock);
-	inode->i_blocks += tmp_inode->i_blocks;
-	spin_unlock(&inode->i_lock);
-	up_write(&EXT4_I(inode)->i_data_sem);
-
-	/*
-	 * We mark the inode dirty after, because we decrement the
-	 * i_blocks when freeing the indirect meta-data blocks
-	 */
-	retval = free_ind_block(handle, inode, i_data);
-	ext4_mark_inode_dirty(handle, inode);
-
-err_out:
-	return retval;
-}
-
-static int free_ext_idx(handle_t *handle, struct inode *inode,
-					struct ext4_extent_idx *ix)
-{
-	int i, retval = 0;
-	ext4_fsblk_t block;
-	struct buffer_head *bh;
-	struct ext4_extent_header *eh;
-
-	block = ext4_idx_pblock(ix);
-	bh = sb_bread(inode->i_sb, block);
-	if (!bh)
-		return -EIO;
-
-	eh = (struct ext4_extent_header *)bh->b_data;
-	if (eh->eh_depth != 0) {
-		ix = EXT_FIRST_INDEX(eh);
-		for (i = 0; i < le16_to_cpu(eh->eh_entries); i++, ix++) {
-			retval = free_ext_idx(handle, inode, ix);
-			if (retval)
-				break;
-		}
-	}
-	put_bh(bh);
-	extend_credit_for_blkdel(handle, inode);
-	ext4_free_blocks(handle, inode, NULL, block, 1,
-			 EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET);
-	return retval;
-}
-
-/*
- * Free the extent meta data blocks only
- */
-static int free_ext_block(handle_t *handle, struct inode *inode)
-{
-	int i, retval = 0;
-	struct ext4_inode_info *ei = EXT4_I(inode);
-	struct ext4_extent_header *eh = (struct ext4_extent_header *)ei->i_data;
-	struct ext4_extent_idx *ix;
-	if (eh->eh_depth == 0)
-		/*
-		 * No extra blocks allocated for extent meta data
-		 */
-		return 0;
-	ix = EXT_FIRST_INDEX(eh);
-	for (i = 0; i < le16_to_cpu(eh->eh_entries); i++, ix++) {
-		retval = free_ext_idx(handle, inode, ix);
-		if (retval)
-			return retval;
-	}
-	return retval;
-
-}
-
-int ext4_ext_migrate(struct inode *inode)
-{
-	handle_t *handle;
-	int retval = 0, i;
-	__le32 *i_data;
-	struct ext4_inode_info *ei;
-	struct inode *tmp_inode = NULL;
-	struct migrate_struct lb;
-	unsigned long max_entries;
-	__u32 goal;
-	uid_t owner[2];
-
-	/*
-	 * If the filesystem does not support extents, or the inode
-	 * already is extent-based, error out.
-	 */
-	if (!EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
-				       EXT4_FEATURE_INCOMPAT_EXTENTS) ||
-	    (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
-		return -EINVAL;
-
-	if (S_ISLNK(inode->i_mode) && inode->i_blocks == 0)
-		/*
-		 * don't migrate fast symlink
-		 */
-		return retval;
-
-	handle = ext4_journal_start(inode,
-					EXT4_DATA_TRANS_BLOCKS(inode->i_sb) +
-					EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
-					EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb)
-					+ 1);
-	if (IS_ERR(handle)) {
-		retval = PTR_ERR(handle);
-		return retval;
-	}
-	goal = (((inode->i_ino - 1) / EXT4_INODES_PER_GROUP(inode->i_sb)) *
-		EXT4_INODES_PER_GROUP(inode->i_sb)) + 1;
-	owner[0] = inode->i_uid;
-	owner[1] = inode->i_gid;
-	tmp_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode,
-				   S_IFREG, NULL, goal, owner);
-	if (IS_ERR(tmp_inode)) {
-		retval = PTR_ERR(tmp_inode);
-		ext4_journal_stop(handle);
-		return retval;
-	}
-	i_size_write(tmp_inode, i_size_read(inode));
-	/*
-	 * Set the i_nlink to zero so it will be deleted later
-	 * when we drop inode reference.
-	 */
-	clear_nlink(tmp_inode);
-
-	ext4_ext_tree_init(handle, tmp_inode);
-	ext4_orphan_add(handle, tmp_inode);
-	ext4_journal_stop(handle);
-
-	/*
-	 * start with one credit accounted for
-	 * superblock modification.
-	 *
-	 * For the tmp_inode we already have committed the
-	 * trascation that created the inode. Later as and
-	 * when we add extents we extent the journal
-	 */
-	/*
-	 * Even though we take i_mutex we can still cause block
-	 * allocation via mmap write to holes. If we have allocated
-	 * new blocks we fail migrate.  New block allocation will
-	 * clear EXT4_STATE_EXT_MIGRATE flag.  The flag is updated
-	 * with i_data_sem held to prevent racing with block
-	 * allocation.
-	 */
-	down_read((&EXT4_I(inode)->i_data_sem));
-	ext4_set_inode_state(inode, EXT4_STATE_EXT_MIGRATE);
-	up_read((&EXT4_I(inode)->i_data_sem));
-
-	handle = ext4_journal_start(inode, 1);
-	if (IS_ERR(handle)) {
-		/*
-		 * It is impossible to update on-disk structures without
-		 * a handle, so just rollback in-core changes and live other
-		 * work to orphan_list_cleanup()
-		 */
-		ext4_orphan_del(NULL, tmp_inode);
-		retval = PTR_ERR(handle);
-		goto out;
-	}
-
-	ei = EXT4_I(inode);
-	i_data = ei->i_data;
-	memset(&lb, 0, sizeof(lb));
-
-	/* 32 bit block address 4 bytes */
-	max_entries = inode->i_sb->s_blocksize >> 2;
-	for (i = 0; i < EXT4_NDIR_BLOCKS; i++) {
-		if (i_data[i]) {
-			retval = update_extent_range(handle, tmp_inode,
-						le32_to_cpu(i_data[i]), &lb);
-			if (retval)
-				goto err_out;
-		} else
-			lb.curr_block++;
-	}
-	if (i_data[EXT4_IND_BLOCK]) {
-		retval = update_ind_extent_range(handle, tmp_inode,
-				le32_to_cpu(i_data[EXT4_IND_BLOCK]), &lb);
-			if (retval)
-				goto err_out;
-	} else
-		lb.curr_block += max_entries;
-	if (i_data[EXT4_DIND_BLOCK]) {
-		retval = update_dind_extent_range(handle, tmp_inode,
-				le32_to_cpu(i_data[EXT4_DIND_BLOCK]), &lb);
-			if (retval)
-				goto err_out;
-	} else
-		lb.curr_block += max_entries * max_entries;
-	if (i_data[EXT4_TIND_BLOCK]) {
-		retval = update_tind_extent_range(handle, tmp_inode,
-				le32_to_cpu(i_data[EXT4_TIND_BLOCK]), &lb);
-			if (retval)
-				goto err_out;
-	}
-	/*
-	 * Build the last extent
-	 */
-	retval = finish_range(handle, tmp_inode, &lb);
-err_out:
-	if (retval)
-		/*
-		 * Failure case delete the extent information with the
-		 * tmp_inode
-		 */
-		free_ext_block(handle, tmp_inode);
-	else {
-		retval = ext4_ext_swap_inode_data(handle, inode, tmp_inode);
-		if (retval)
-			/*
-			 * if we fail to swap inode data free the extent
-			 * details of the tmp inode
-			 */
-			free_ext_block(handle, tmp_inode);
-	}
-
-	/* We mark the tmp_inode dirty via ext4_ext_tree_init. */
-	if (ext4_journal_extend(handle, 1) != 0)
-		ext4_journal_restart(handle, 1);
-
-	/*
-	 * Mark the tmp_inode as of size zero
-	 */
-	i_size_write(tmp_inode, 0);
-
-	/*
-	 * set the  i_blocks count to zero
-	 * so that the ext4_delete_inode does the
-	 * right job
-	 *
-	 * We don't need to take the i_lock because
-	 * the inode is not visible to user space.
-	 */
-	tmp_inode->i_blocks = 0;
-
-	/* Reset the extent details */
-	ext4_ext_tree_init(handle, tmp_inode);
-	ext4_journal_stop(handle);
-out:
-	unlock_new_inode(tmp_inode);
-	iput(tmp_inode);
-
-	return retval;
-}