[U-Boot] ext4: crash when writing a file

[Brüns, Stefan]

On Dienstag, 29. November 2016 10:50:45 CET you wrote:
> Hello,
> 
> I am working on a i.MX6UL based board with a 4GB eMMC partitioned as
> following:
> 
> Device     Boot   Start     End Sectors  Size Id Type
> /dev/sdb1          2048  264191  262144  128M 83 Linux
> /dev/sdb2        264192 4458495 4194304    2G 83 Linux
> /dev/sdb3       4458496 7634943 3176448  1.5G 83 Linux
> 
> On the 2nd partition, I write this ext4 filesystem file generated by
> Buildroot:
> Filesystem volume name:   "ROOTFS"
> Last mounted on:          <not available>
> Filesystem UUID:          b9833a36-e89d-429a-b120-c3b00bcb7785
> Filesystem magic number:  0xEF53
> Filesystem revision #:    1 (dynamic)
> Filesystem features:      has_journal dir_index filetype extent
> sparse_super uninit_bg
> Filesystem flags:         signed_directory_hash
> Default mount options:    (none)
> Filesystem state:         clean
> Errors behavior:          Unknown (continue)
> Filesystem OS type:       Linux
> Inode count:              3456
> Block count:              91756
91756 blocks ...

> Reserved block count:     4587
> Free blocks:              13458
> Free inodes:              488
> First block:              1
> Block size:               1024
1k each -> 91 MByte filesystem

> Fragment size:            1024
> Blocks per group:         7648
> Fragments per group:      7648
> Inodes per group:         288
> Inode blocks per group:   36
> Last mount time:          n/a
> Last write time:          Tue Nov 29 09:44:52 2016
> Mount count:              0
> Maximum mount count:      -1
> Last checked:             Tue Nov 29 09:44:52 2016
> Check interval:           0 (<none>)
> Reserved blocks uid:      0 (user root)
> Reserved blocks gid:      0 (group root)
> First inode:              11
> Inode size:               128
> Journal inode:            8
> Default directory hash:   half_md4
> Directory Hash Seed:      a583a07f-6b59-442d-8e08-9be305f78d17
> Journal backup:           inode blocks
> 
> This filesystem is written with the following commands:
> 
> BIOS> setexpr nbblocks ${filesize} / 0x200
> BIOS> setexpr nbblocks ${nbblocks} + 1
> BIOS> mmc write ${loadaddr} 0x40800 ${nbblocks}
> MMC write: dev # 0, block # 264192, count 183513 ... 183513 blocks
> written: OK
> 
> I can boot Linux with it without any issues, however if I try to write a
> file in it I get the following crash:
> 
> BIOS> ext4write mmc 0:2 ${loadaddr} /boot/${kernelimg} ${filesize}

What are you trying to achieve here? What is the value of $filesize?

Btw, which u-boot version are you using?

Regards,

Stefan