On Tue, Nov 8, 2011 at 8:48 PM, Manish Katiyar <[email protected]> wrote:
> On Tue, Nov 8, 2011 at 6:02 AM, Dan Luedtke <[email protected]> > wrote: > > Thanks for all the answers! > > > >> You need to look at other block-based file systems in the kernel > sources in fs dir for examples and understand how they do it. > > I looked at fs/minix/* fs/fat/* and peeked into fs/ext2/, but got more > > confused so I decided to ask for a starting point. > > Hi Dan, > > You may find https://github.com/mkatiyar/testfs helpful. > > > > >> Also i think if you are interested in reading the first sector > >> then you can probably check the block/genhd.c file > >> get the disk (i.e struct genhd) then the partition (struct hdpart) > >> you will be able to get the first sector. > > Thanks, a well documented source file. However, shouldn't I get the > > right partition (I called it block device in previously sent mails, > > thought of e.g. /dev/sda2 as a device not a partition) from VFS when a > > user requestes mounting it? > > > >> That's an old assignment from my uni. > > Wow, exactly what I needed! Thanks for this starting point. > > > >> I would redirect you to learn about struct gendisk and struct bio. > > Noted, I will take a look after studying the vvfs-files from Stephens > link. > > > >> Can you tell what are you trying to achieve? > > I'd like to implement a filesystem as kernel modul (like fat, ext2, > > ...). The filesystem is a very simple one, based on chained blocks > > (similar to linked lists in c). I "invented" it when I tried to write > > a bootloader that does not require a second stage to read an kernel > > image. (This is all more or less a "because we can"-project, no > > commercial background, just learning). > > > > Once again, thank you guys! > > > > Greetings, > > > > Dan > > -- > > Dan Luedtke > > http://www.danrl.de > > > > _______________________________________________ > > Kernelnewbies mailing list > > [email protected] > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > > > > -- > Thanks - > Manish > Nice reference manish :) Regards, Rohan Puri
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