Hyunchul, Am 30.05.2017 um 04:37 schrieb Hyunchul Lee: >> UBIFS is designed to be power-cut tolerant. >> So, UBIFS must not corrupt in any case. >> >> Which failure are you facing? >> >> I have the feeling that you try to paper over some other issue. :-) > > The failure hasn't happened. I wondered the following situation > should be handled. > > ubifs_create > ubifs_jnl_update > write_head > ubifs_tnc_add_nm /* (1) add dentry to TNC */ > ubifs_tnc_add /* (2) add new inode to TNC */ > ubifs_tnc_add /* (3) add parent inode to TNC */ > > If ubifs_tnc_add(2) fails, TNC would have the index of a dentry > which points to an invalid inode. So, though ubifs_readdir > emits the dentry, this inode cannot be accessed. Becasue > there isn't the index of the inode. Well, to make ubifs_jnl_update() more robust wrt. such unlikely failures please rework the journal code. Adding freeze support does not fix the root cause. UBIFS treats unrecoverable errors in ubifs_jnl_* since ever as fatal. Thanks, //richard
