From cbd56e7d20d7188d62a85aa6986a7b2c8e755ab5 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Tue, 30 Jul 2013 11:36:53 +0900 Subject: f2fs: fix handling orphan inodes This patch fixes mishandling of the sbi->n_orphans variable. If users request lots of f2fs_unlink(), check_orphan_space() could be contended. In such the case, sbi->n_orphans can be read incorrectly so that f2fs_unlink() would fall into the wrong state which results in the failure of add_orphan_inode(). So, let's increment sbi->n_orphans virtually prior to the actual orphan inode stuffs. After that, let's release sbi->n_orphans by calling release_orphan_inode or remove_orphan_inode. Signed-off-by: Jaegeuk Kim --- fs/f2fs/namei.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) (limited to 'fs/f2fs/namei.c') diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 32972787f12f..4e475181280c 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -239,7 +239,7 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry) if (!de) goto fail; - err = check_orphan_space(sbi); + err = acquire_orphan_inode(sbi); if (err) { kunmap(page); f2fs_put_page(page, 0); @@ -393,7 +393,7 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *old_inode = old_dentry->d_inode; struct inode *new_inode = new_dentry->d_inode; struct page *old_dir_page; - struct page *old_page; + struct page *old_page, *new_page; struct f2fs_dir_entry *old_dir_entry = NULL; struct f2fs_dir_entry *old_entry; struct f2fs_dir_entry *new_entry; @@ -415,7 +415,6 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, ilock = mutex_lock_op(sbi); if (new_inode) { - struct page *new_page; err = -ENOTEMPTY; if (old_dir_entry && !f2fs_empty_dir(new_inode)) @@ -427,9 +426,13 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, if (!new_entry) goto out_dir; + err = acquire_orphan_inode(sbi); + if (err) + goto put_out_dir; + if (update_dent_inode(old_inode, &new_dentry->d_name)) { - f2fs_put_page(new_page, 1); - goto out_dir; + release_orphan_inode(sbi); + goto put_out_dir; } f2fs_set_link(new_dir, new_entry, new_page, old_inode); @@ -438,8 +441,12 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, if (old_dir_entry) drop_nlink(new_inode); drop_nlink(new_inode); + if (!new_inode->i_nlink) add_orphan_inode(sbi, new_inode->i_ino); + else + release_orphan_inode(sbi); + update_inode_page(new_inode); } else { err = f2fs_add_link(new_dentry, old_inode); @@ -472,6 +479,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, mutex_unlock_op(sbi, ilock); return 0; +put_out_dir: + f2fs_put_page(new_page, 1); out_dir: if (old_dir_entry) { kunmap(old_dir_page); -- cgit v1.2.3