On Wed, Jan 15, 2014 at 07:11:16AM +0900, Tetsuo Handa wrote: > Miklos Szeredi wrote: > > + > > + if (flags) > > + return -EOPNOTSUPP; > > + > > If (at least for now) only ext4 interprets renameat2() flags, > I think adding a new member to "struct inode_operations" and > check it like > > if (!old_dir->i_op->swapname) > return -EOPNOTSUPP; > > or This is not just about swapname, but other rename variants too (non-overwriting rename is also included in the patchset). > > if (!(old_dir->i_op->supported_features & flags)) > return -EOPNOTSUPP; Or rather old_dir->i_sb->s_type->fs_flags. We access it due to FS_RENAME_DOES_D_MOVE anyway. I like this variant, because now filesystems need to explicitly add a flag to *enable* the functionality and not a check to disable it. Objections? Thanks, Miklos -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
