[U-Boot] ubifsmount problems

[Simon Kagstrom]

Hi!

I'm trying to get ubifs working in U-boot on a ARM-based board (OpenRD
base). I first encountered a number of build problems, and I'll send a
set of patches to fix those later today, but I still can't get it to
mount my filesystem. This is what I've done.

0. The board uses a Marvell 88f6281 and has a 512MB Hynix NAND flash

     http://www.hynix.com/datasheet/pdf/flash/HY27UF084G2M%20Series(Rev.0.7).pdf

   which works fine with normal accesses (nand read/write etc)

1. I've created a small 4MB ubifs image with the upstream git head of mtd-utils:

     mkfs.ubifs -r vobb -m 2KiB -e 126976 -c 30 -o /tmp/ubifs.img -x zlib 
     ubinize -o /tmp/ubi.img -m 2KiB -p 128KiB -s 2KiB /tmp/ubinize.cfg -O 2048

   /tmp/ubinize.cfg is below, and the rest of the options are the same
   as the normal OpenRD base filesystem is built with. The filesystem
   just contains a single file with some text in.

   Linux can properly mount it (2.6.30). I've also tried with various
   other options, but it all fails in some way.

2. I have the following U-boot environment:

     mtdids=nand0=nand_mtd
     mtdparts=mtdparts=nand_mtd:0x100000 at 0x000000(uboot),0x400000 at 0x100000(uImage),0x1fb00000 at 0x500000(rootfs)

   and I've written my filesystem image to (confusingly enough) the
   uImage partition using U-boots nand write command.

3. I setup the UBI partition with

     Marvell>> ubi part uImage 2048
     Creating 1 MTD partitions on "nand0":
     0x000000100000-0x000000500000 : "mtd=1"
     UBI: attaching mtd1 to ubi0
     UBI: physical eraseblock size:   131072 bytes (128 KiB)
     UBI: logical eraseblock size:    126976 bytes
     UBI: smallest flash I/O unit:    2048
     UBI: sub-page size:              512
     UBI: VID header offset:          2048 (aligned 2048)
     UBI: data offset:                4096
     UBI: attached mtd1 to ubi0
     UBI: MTD device name:            "mtd=1"
     UBI: MTD device size:            4 MiB
     UBI: number of good PEBs:        32
     UBI: number of bad PEBs:         0
     UBI: max. allowed volumes:       128
     UBI: wear-leveling threshold:    4096
     UBI: number of internal volumes: 1
     UBI: number of user volumes:     1
     UBI: available PEBs:             0
     UBI: total number of reserved PEBs: 32
     UBI: number of PEBs reserved for bad PEB handling: 2
     UBI: max/mean erase counter: 1/0

   which seemingly works fine (the extra paramenter to ubi part is for
   the VID header offset, it's part of the coming patch set).

4. I try to mount the image with (the name is from ubinize.cfg below):

     Marvell>> ubifsmount rootfs
     name ubi:rootfs, flags 0x1
     UBIFS: recovery needed
     UBIFS error (pid 0): check_lpt_crc: invalid crc in LPT node: crc 3e1 calc 2105
     UBIFS error (pid 0): ubifs_read_nnode: error -22 reading nnode at 7:29
     Error reading superblock on volume 'ubi:rootfs'!

  and here is where I'm stuck. 

Anyone has any clue as to why this fails?

Thanks,
// Simon

[ubifs]
mode=ubi
image=/tmp/ubifs.img
vol_id=0
vol_size=2MiB
vol_type=dynamic
vol_name=rootfs
vol_flags=autoresize