nilfs2: i_nlink races in rename()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 9803427..161791d 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -397,7 +397,6 @@
new_de = nilfs_find_entry(new_dir, &new_dentry->d_name, &new_page);
if (!new_de)
goto out_dir;
- inc_nlink(old_inode);
nilfs_set_link(new_dir, new_de, new_page, old_inode);
nilfs_mark_inode_dirty(new_dir);
new_inode->i_ctime = CURRENT_TIME;
@@ -411,13 +410,9 @@
if (new_dir->i_nlink >= NILFS_LINK_MAX)
goto out_dir;
}
- inc_nlink(old_inode);
err = nilfs_add_link(new_dentry, old_inode);
- if (err) {
- drop_nlink(old_inode);
- nilfs_mark_inode_dirty(old_inode);
+ if (err)
goto out_dir;
- }
if (dir_de) {
inc_nlink(new_dir);
nilfs_mark_inode_dirty(new_dir);
@@ -431,7 +426,6 @@
old_inode->i_ctime = CURRENT_TIME;
nilfs_delete_entry(old_de, old_page);
- drop_nlink(old_inode);
if (dir_de) {
nilfs_set_link(old_inode, dir_de, dir_page, new_dir);