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ufs: i_nlink races in rename()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-03-02 09:40:21 -05:00
parent 4787d45fa7
commit 37750cdda3
1 changed files with 2 additions and 7 deletions
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9
fs/ufs/namei.c
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@ -306,7 +306,6 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
new_de = ufs_find_entry(new_dir, &new_dentry->d_name, &new_page);
if (!new_de)
goto out_dir;
inode_inc_link_count(old_inode);
ufs_set_link(new_dir, new_de, new_page, old_inode);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
@ -318,12 +317,9 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (new_dir->i_nlink >= UFS_LINK_MAX)
goto out_dir;
}
inode_inc_link_count(old_inode);
err = ufs_add_link(new_dentry, old_inode);
if (err) {
inode_dec_link_count(old_inode);
if (err)
goto out_dir;
}
if (dir_de)
inode_inc_link_count(new_dir);
}
@ -331,12 +327,11 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
/*
* Like most other Unix systems, set the ctime for inodes on a
* rename.
* inode_dec_link_count() will mark the inode dirty.
*/
old_inode->i_ctime = CURRENT_TIME_SEC;
ufs_delete_entry(old_dir, old_de, old_page);
inode_dec_link_count(old_inode);
mark_inode_dirty(old_inode);
if (dir_de) {
ufs_set_link(old_inode, dir_de, dir_page, new_dir);