Hi Ryusuke, > On Mon, 2014-04-21 at 01:18 +0900, Ryusuke Konishi wrote: > > > > One my question is about the "device" name. Is it guaranteed that > > every device has canonical single node name? What will happen for > > devices such as /dev/mapper/xxx? > > I've checked this by means of using kpartx utility. At first I've prepared the image with several partitions on it. Then I've created device maps from partition table: kpartx -va ./<image-file> As a result, I can see such situation: ls -lah /dev/mapper/ total 0 drwxr-xr-x 2 root root 120 Apr 29 18:38 . drwxr-xr-x 16 root root 4.2K Apr 29 18:38 .. crw------- 1 root root 10, 236 Apr 29 09:58 control lrwxrwxrwx 1 root root 7 Apr 29 18:38 loop0p1 -> ../dm-0 lrwxrwxrwx 1 root root 7 Apr 29 18:38 loop0p2 -> ../dm-1 lrwxrwxrwx 1 root root 7 Apr 29 18:38 loop0p3 -> ../dm-2 Finally, namely, dm-0 (and so on) is used as name of device during creation of /sys/fs/nilfs2/<device> group. Moreover, other file systems are used sb->s_id for device naming too. I think that it is safe way of device naming. With the best regards, Vyacheslav Dubeyko. -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
