Messages in this thread |  | | Date | Tue, 3 Sep 2002 00:00:32 +0400 | From | Molbo <> | Subject | may be new filesystem module? |
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F.P. sorry for this long and may be OT post
hd partitions is a hardware bug LVM is a thing that is a level higher that hd partitions
can some body point my to souch thing: it must be mountable with mount, and must connect mounted filesystem according some rules in to one filesystem(mount point) (like lvm combines hd partions in one and splits by rules sorry if I'm not so correct as is it, am'not familiar with lvm) as example1: I have hda1 hda2 and mount them to /mnt/hda1 with ext2 and /mnt/hda2 with umsdos, first and second mount points are normal capable dirs, and I wona have all this space in one place as /mnt/one simple combine two dirs in one, how share dirs and files between is a rule task
second example(that actualy is my interest) is: if I have mounted in prev example /mnt/hda1 as read only and /mnt/hda2 as rw then I combine two dirs in one /mnt/one simple rule for this case may be if opens /mnt/one/somefile first search it as /mnt/hda2/somefile if not found in /mnt/hda1/somefile second rule is that when try to write to /mnt/one/somefile and it is open from /mnt/hda1 (that ro is) make a copy of this file on /mnt/hda2/somefile, open from this location and write to it
this allows to have some data on cd as example and update of this data on hd
I know AVFS but it works not as mountable filesystem but as some hack and to do rule from second example, it must be great work(may be)
--------questions--------- how i can do that i have a lot of files on cd and there modifyed versions on hdd, and as result I'm using uptodate data (I think about cd based linux and i know some projects, but it's all ~1g to download and have some packages that i won't and not have packages that i wona. I can install on hdd packages that i wona and burn it on cd, but from beginning i must known what and how it must be config'd, and this config must be for all cases it is impossible) and it is a way to have small part of data on each machine where i'm using cd based linux, with config that for this machine actual is second possibility that i see is to easy to convert every rw mountable filesystem to ext2 comparatible, as umsdos do it to msdos filesystem
another possibility is to get for each process and user own view of root tree. I see it as usefull, as example each user can have own pap and chap secrets in same place /etc/ppp going somewhere a project that have properties that I have tryed to describe
Or some place where I can found answer to : how to from module that is mounted to some mount point get access to file from another filesystem (i have looked some kern and modules src but ansver to the question is not so clear for my, how make it rigth way)(better as working example, or some docs to this topic)
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