f2fs: convert inline_dir early before starting rename
If we hit an error during rename, we'll get two dentries in different
directories.
Chao adds to check the room in inline_dir which can avoid needless
inversion. This should be done by inode_lock(&old_dir).
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index c967cac..b56f6060 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -578,6 +578,20 @@ int f2fs_room_for_filename(const void *bitmap, int slots, int max_slots)
goto next;
}
+bool f2fs_has_enough_room(struct inode *dir, struct page *ipage,
+ struct fscrypt_name *fname)
+{
+ struct f2fs_dentry_ptr d;
+ unsigned int bit_pos;
+ int slots = GET_DENTRY_SLOTS(fname_len(fname));
+
+ make_dentry_ptr_inline(dir, &d, inline_data_addr(dir, ipage));
+
+ bit_pos = f2fs_room_for_filename(d.bitmap, slots, d.max);
+
+ return bit_pos < d.max;
+}
+
void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
const struct qstr *name, f2fs_hash_t name_hash,
unsigned int bit_pos)
