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| author | zhangyi (F) <yi.zhang@huawei.com> | 2020-06-08 11:40:43 +0800 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2020-07-09 08:14:00 +0200 |
| commit | a43850a380ef56009ce721737b0c08984b663b99 (patch) | |
| tree | d45a10e93abd3bde1853699d93c45cc40706d99b /fs/ext2 | |
| parent | b4962091a54c8c332e4c6c211a86b7f6d6e1f759 (diff) | |
| download | linux-a43850a380ef56009ce721737b0c08984b663b99.tar.gz | |
ext2: ext2_find_entry() return -ENOENT if no entry found
Almost all callers of ext2_find_entry() transform NULL return value to -ENOENT, so just let ext2_find_entry() retuen -ENOENT instead of NULL if no valid entry found, and also switch to check the return value of ext2_inode_by_name() in ext2_lookup() and ext2_get_parent(). Link: https://lore.kernel.org/r/20200608034043.10451-2-yi.zhang@huawei.com Signed-off-by: zhangyi (F) <yi.zhang@huawei.com> Suggested-by: Jan Kara <jack@suse.cz> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext2')
| -rw-r--r-- | fs/ext2/dir.c | 4 | ||||
| -rw-r--r-- | fs/ext2/namei.c | 27 |
2 files changed, 10 insertions, 21 deletions
diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c index 95e4f0bd55a3..70355ab6740e 100644 --- a/fs/ext2/dir.c +++ b/fs/ext2/dir.c @@ -393,7 +393,7 @@ struct ext2_dir_entry_2 *ext2_find_entry (struct inode *dir, } } while (n != start); out: - return NULL; + return ERR_PTR(-ENOENT); found: *res_page = page; @@ -419,7 +419,7 @@ int ext2_inode_by_name(struct inode *dir, const struct qstr *child, ino_t *ino) struct page *page; de = ext2_find_entry(dir, child, &page); - if (IS_ERR_OR_NULL(de)) + if (IS_ERR(de)) return PTR_ERR(de); *ino = le32_to_cpu(de->inode); diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c index 9a6ab213bc4d..5bf2c145643b 100644 --- a/fs/ext2/namei.c +++ b/fs/ext2/namei.c @@ -56,17 +56,18 @@ static inline int ext2_add_nondir(struct dentry *dentry, struct inode *inode) static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags) { struct inode * inode; - ino_t ino = 0; + ino_t ino; int res; if (dentry->d_name.len > EXT2_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); res = ext2_inode_by_name(dir, &dentry->d_name, &ino); - if (res) - return ERR_PTR(res); - inode = NULL; - if (ino) { + if (res) { + if (res != -ENOENT) + return ERR_PTR(res); + inode = NULL; + } else { inode = ext2_iget(dir->i_sb, ino); if (inode == ERR_PTR(-ESTALE)) { ext2_error(dir->i_sb, __func__, @@ -81,14 +82,13 @@ static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, uns struct dentry *ext2_get_parent(struct dentry *child) { struct qstr dotdot = QSTR_INIT("..", 2); - ino_t ino = 0; + ino_t ino; int res; res = ext2_inode_by_name(d_inode(child), &dotdot, &ino); if (res) return ERR_PTR(res); - if (!ino) - return ERR_PTR(-ENOENT); + return d_obtain_alias(ext2_iget(child->d_sb, ino)); } @@ -287,10 +287,6 @@ static int ext2_unlink(struct inode * dir, struct dentry *dentry) err = PTR_ERR(de); goto out; } - if (!de) { - err = -ENOENT; - goto out; - } err = ext2_delete_entry (de, page); if (err) @@ -347,10 +343,6 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry, err = PTR_ERR(old_de); goto out; } - if (!old_de) { - err = -ENOENT; - goto out; - } if (S_ISDIR(old_inode->i_mode)) { err = -EIO; @@ -367,14 +359,11 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry, if (dir_de && !ext2_empty_dir (new_inode)) goto out_dir; - err = -ENOENT; new_de = ext2_find_entry(new_dir, &new_dentry->d_name, &new_page); if (IS_ERR(new_de)) { err = PTR_ERR(new_de); goto out_dir; } - if (!new_de) - goto out_dir; ext2_set_link(new_dir, new_de, new_page, old_inode, 1); new_inode->i_ctime = current_time(new_inode); if (dir_de) |