Hello, I have an idea to allow shrinkage of a Reiser4 volume. And I ask help in writing a command line utility for it. my idea's,example: - ensure debugfs.reiser4 installed. [debugfs.reiser4] reiser4progs - check unmounted volume is a Reiser4 formatted partition. - find the last 'used block' on a unmounted Reiser4 partition [1] - check block number is greater than >0 and less than < the maximum block of reiser4 volume size. - print details of new volume, space unused. - ask to perform shrink reiser4 volume to nnn. - if 'y' do volume shrink. - verify volume details and print new details used/free, Reason I ask: Allow shinkage of reiser4 volume to last 'used block' + [n blocks free] Since no reiser4 blocks moved, no reiser4 metadata changes needed. Just volume size changes [no blocks moved]. Is this idea logical to ask ? Thanks --Glenn [1] find the last 'used block'. # debugfs.reiser4 /dev/sdb2 --print-tree | grep -i "NODE" | grep -v "NPTR"| cut -d" " -f2 | sed 's/(//' | sed 's/)//' |sort -n |tail -1 Format release: 4.0.1 Copyright (C) 2001-2005 by Hans Reiser, licensing governed by reiser4progs/COPYING. 2938354 other info: Total blocks used: ################# # debugfs.reiser4 /dev/sdb2 --print-tree | grep -i "NODE" | grep -v "NPTR"| cut -d" " -f2 | sed 's/(//' | sed 's/)//' |sort -n | wc -l debugfs.reiser4 1.1.0 Format release: 4.0.1 Copyright (C) 2001-2005 by Hans Reiser, licensing governed by reiser4progs/COPYING. 833657 -- To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
