On Sat, Jan 16, 2010 at 09:39:58AM +0100, Milan Broz wrote: > On 01/16/2010 03:46 AM, Arno Wagner wrote: > > It does. Each possible /dev/sd<x> has a defined, fixed > > major/minor, see Documentation/devices.txt in a Linux kernel > > source tree. > > so long thread:-) > > Well, the situation is more complicated. > > If cryptsetup uses only "real" block devices (like /dev/sdaX), > then fix to display proper device is is trivial. > (Parsing is in cryptsetup internal, not system libdevmapper currently.) > > But if you have stacked devices "virtual block devices" > (crypt over MD or over LVM) it can be different - you want to see > /dev/VG/LV as device, not /dev/dm-X. > > (btw dm-X names are not persistent and were intended to be kernel internal > only, unfortunately now are visible in userspace because of unified > udev event processing. And renaming these nodes to me more user-frientdly > in kernel is not easy because of various name length limits and different > approach for renaming of active DM devices) > > But the real problem now is that device-mapper library is just > in process of transition to udev (all nodes and symlinks will be created > by udev and not internally in libdevmapper). > And this changed (unified) some nodes to symlinks and vice versa. > > With various maintainer's udev rules in various ditributions it creates nice > mix and Debian usually modifies even default rules for dm devices. > > (Actually if you have an udev rule, which creates another node and not > symlink in /dev/scsi/..., it is probably not correct, it should be symlink.) I think so too, but I am unable to find it. Maybe I will just start to disable udev rules, until the behaviour goes away. Then I can file a bug report wth Debian. > Anyway, I'll plan to fix it somehow in next minor release of cryptsetup > (1.1.1 probably). Looking forward to find out what your solutin will be ;-) Arno > Milan > _______________________________________________ > dm-crypt mailing list > dm-crypt@xxxxxxxx > http://www.saout.de/mailman/listinfo/dm-crypt > -- Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@xxxxxxxxxxx GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F ---- Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans If it's in the news, don't worry about it. The very definition of "news" is "something that hardly ever happens." -- Bruce Schneier _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
