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Commit 5b61de75 authored by Theodore Ts'o's avatar Theodore Ts'o
Browse files

ext4: start handle at least possible moment when renaming files 



In ext4_rename(), don't start the journal handle until the the
directory entries have been successfully looked up.

Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 7869a4a6

fs/ext4/namei.c

+13 −10
Original line number Diff line number Diff line
@@ -3009,7 +3009,7 @@ static struct buffer_head *ext4_get_first_dir_block(handle_t *handle, 
static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,

		       struct inode *new_dir, struct dentry *new_dentry)

{

	handle_t *handle;

	handle_t *handle = NULL;

	struct inode *old_inode, *new_inode;

	struct buffer_head *old_bh, *new_bh, *dir_bh;

	struct ext4_dir_entry_2 *old_de, *new_de;
@@ -3026,14 +3026,6 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, 
	 * in separate transaction */

	if (new_dentry->d_inode)

		dquot_initialize(new_dentry->d_inode);

	handle = ext4_journal_start(old_dir, EXT4_HT_DIR,

		(2 * EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) +

		 EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2));

	if (IS_ERR(handle))

		return PTR_ERR(handle);



	if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))

		ext4_handle_sync(handle);



	old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de, NULL);

	/*
@@ -3056,6 +3048,16 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, 
			new_bh = NULL;

		}

	}



	handle = ext4_journal_start(old_dir, EXT4_HT_DIR,

		(2 * EXT4_DATA_TRANS_BLOCKS(old_dir->i_sb) +

		 EXT4_INDEX_EXTRA_TRANS_BLOCKS + 2));

	if (IS_ERR(handle))

		return PTR_ERR(handle);



	if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))

		ext4_handle_sync(handle);



	if (S_ISDIR(old_inode->i_mode)) {

		if (new_inode) {

			retval = -ENOTEMPTY;
@@ -3195,6 +3197,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, 
	brelse(dir_bh);

	brelse(old_bh);

	brelse(new_bh);

	if (handle)

		ext4_journal_stop(handle);

	if (retval == 0 && force_da_alloc)

		ext4_alloc_da_blocks(old_inode);