From 8abf074188ee0abc7d8317d689ccf13c176751de Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Wed, 25 May 2016 14:29:11 -0700 Subject: f2fs: propagate error given by f2fs_find_entry If we get ENOMEM or EIO in f2fs_find_entry, we should stop right away. Otherwise, for example, we can get duplicate directory entry by ->chash and ->clevel. Signed-off-by: Jaegeuk Kim --- fs/f2fs/dir.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) (limited to 'fs/f2fs/dir.c') diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index 895b0ffc1..94fcec996 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -186,8 +186,13 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir, /* no need to allocate new dentry pages to all the indices */ dentry_page = find_data_page(dir, bidx); if (IS_ERR(dentry_page)) { - room = true; - continue; + if (PTR_ERR(dentry_page) == -ENOENT) { + room = true; + continue; + } else { + *res_page = dentry_page; + break; + } } de = find_in_block(dentry_page, fname, namehash, &max_slots, @@ -224,19 +229,22 @@ struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir, struct qstr *child, struct fscrypt_name fname; int err; - *res_page = NULL; - err = fscrypt_setup_filename(dir, child, 1, &fname); - if (err) + if (err) { + *res_page = ERR_PTR(-ENOMEM); return NULL; + } if (f2fs_has_inline_dentry(dir)) { + *res_page = NULL; de = find_in_inline_dir(dir, &fname, res_page); goto out; } - if (npages == 0) + if (npages == 0) { + *res_page = NULL; goto out; + } max_depth = F2FS_I(dir)->i_current_depth; if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) { @@ -248,8 +256,9 @@ struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir, struct qstr *child, } for (level = 0; level < max_depth; level++) { + *res_page = NULL; de = find_in_level(dir, level, &fname, res_page); - if (de) + if (de || IS_ERR(*res_page)) break; } out: -- cgit v1.2.3