setup ubifs

[Geert Uytterhoeven]

On Thu, 17 Sep 2009, Mike Frysinger wrote:
> On Thu, Sep 17, 2009 at 11:43, Artem Bityutskiy wrote:
> > On Thu, 2009-09-17 at 18:29 +0300, Dimitar Penev wrote:
> >> I am tring to setup ubifs on an blackfin based embeded platform containg
> >> nand flash.
> >> jffs2 is working ok on it.
> >>
> >> So I have compiled the uclinux (kernel 2.6.28.10) with ubifs/mtd_ubi static
> >> support
> >> If I pass with the bootargs ubi.mtd=3 , during booting I see
> >>
> >> ...
> >> UBI: attaching mtd3 to ubi0
> >> UBI: physical eraseblock size: 262144 bytes (256 KiB)
> >> UBI: logical eraseblock size: 258048 bytes
> >> UBI: smallest flash I/O unit: 2048
> >> UBI: VID header offset: 2048 (aligned 2048)
> >> UBI: data offset: 4096
> >> UBI: empty MTD device detected
> >> UBI: create volume table (copy #1)
> >> UBI: create volume table (copy #2)
> >> UBI: attached mtd3 to ubi0
> >> UBI: MTD device name: "persistent file system"
> >> UBI: MTD device size: 1004 MiB
> >> UBI: number of good PEBs: 3974
> >> UBI: number of bad PEBs: 42
> >> UBI: max. allowed volumes: 128
> >> UBI: wear-leveling threshold: 4096
> >> UBI: number of internal volumes: 1
> >> UBI: number of user volumes: 0
> >> UBI: available PEBs: 3931
> >> UBI: total number of reserved PEBs: 43
> >> UBI: number of PEBs reserved for bad PEB handling: 39
> >> UBI: max/mean erase counter: 0/0
> >> UBI: background thread "ubi_bgt0d" started, PID 122
> >> ...
> >>
> >> ubinfo gives me
> >>
> >> root at pr1:~> /bin/ubinfo
> >> UBI version: 1
> >> Count of UBI devices: 1
> >> UBI control device major/minor: 10:63
> >> Present UBI devices: ubi0
> >>
> >> I don't have /dev/ubi0 nor /dev/ubi_ctrl, however I do have some ubi stuff
> >> in my /sys file system
> >>
> >> root at pr1:~> ls /sys/class/ubi/ubi0/
> >> /sys/class/ubi/ubi0/avail_eraseblocks /sys/class/ubi/ubi0/min_io_size
> >> /sys/class/ubi/ubi0/bad_peb_count /sys/class/ubi/ubi0/mtd_num
> >> /sys/class/ubi/ubi0/bgt_enabled /sys/class/ubi/ubi0/reserved_for_bad
> >> /sys/class/ubi/ubi0/dev /sys/class/ubi/ubi0/subsystem/
> >> /sys/class/ubi/ubi0/eraseblock_size /sys/class/ubi/ubi0/total_eraseblocks
> >> /sys/class/ubi/ubi0/max_ec /sys/class/ubi/ubi0/uevent
> >> /sys/class/ubi/ubi0/max_vol_count /sys/class/ubi/ubi0/volumes_count
> >>
> >> root at pr1:~> ls /sys/class/misc/ubi_ctrl/
> >> /sys/class/misc/ubi_ctrl/dev /sys/class/misc/ubi_ctrl/uevent
> >> /sys/class/misc/ubi_ctrl/subsystem/
> >>
> >> I don't have /dev/ubi_ctrl so I can not crete (ubimkvol) ubi volume.
> >>
> >> Can you please give me some pointers.
> >
> > Either make udev work and create device nodes for you automatically,
> > or create them manually. All the major/minor numbers are available
> > in sysfs (sedd "dev" files), so you may create corresponding character
> > device files.
> 
> udev isnt going to happen.  if the stuff is available via sysfs, then
> `mdev -s` should work.

Or CONFIG_DEVTMPFS=y and CONFIG_DEVTMPFS_MOUNT=y in current bleeding edge
2.6.31+.

With kind regards,

Geert Uytterhoeven
Software Architect
Techsoft Centre

Technology and Software Centre Europe
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium

Phone:    +32 (0)2 700 8453
Fax:      +32 (0)2 700 8622
E-mail:   Geert.Uytterhoeven at sonycom.com
Internet: http://www.sony-europe.com/

A division of Sony Europe (Belgium) N.V.
VAT BE 0413.825.160 · RPR Brussels
Fortis · BIC GEBABEBB · IBAN BE41293037680010