Memory Technology Devices – UBI
Memory Technology Devices – UBIFS
Memory Technology Devices – NAND

FreeBSD

NAND Flash Framework Introduction, experimental

Own try…

# file /tmp/nandimg_.JeCb7JOv/common.fs
/tmp/nandimg_.JeCb7JOv/common.fs: UBIfs image, sequence number 8, length 4096, CRC 0x151054e7

# mount -t ubifs /tmp/nandimg_.JeCb7JOv/common.fs /mnt/common
mount: unknown filesystem type 'ubifs'

Should work, but…

Where are the sources for mtd/nand/nandsim kernel module?
UBI / UBIFS on NANDSIM simulator
Simulate NAND MTD Device
Extract and rebuild a UBI image (on Ubuntu)

$ mkdir /mnt/ubi
$ modprobe mtdblock
$ modprobe ubi
$ modprobe nandsim \
first_id_byte=0x20 \
second_id_byte=0xaa \
third_id_byte=0x00 \
fourth_id_byte=0x15
$ cat /proc/mtddev
$ ls -l /dev/mtd*
$ dd if=ubi.img of=/dev/mtdblock[COLOR=red]0[/COLOR] bs=2048
$ ubiattach /dev/ubi_ctrl -m 0
$ ls -l /dev/ubi*
$ mount -t ubifs ubi0_0 /mnt/ubi

$ mkfs.ubifs -m 2048 -e 129024 -c 2047 -r /mnt/ubi ubifs.img
$ nano ubi.ini
[ubifs]mode=ubi
image=ubifs.img
vol_id=0
vol_size=200MiB
vol_type=dynamic
vol_name=rootfs
vol_flags=autoresize
$ ubinize -o ubi.img -p 131072 -m 2048 -s 512 ubi.ini

Compile kernel module

Fedore – Building Only Kernel Modules
How to: Compile Linux kernel modules
“FATAL: Module not found error” using modprobe
Building nandsim for Fedora

$ yum install mtd-utils
$ yum install kernel-devel
$ mkdir -p ~/src/nand
$ cd ~/src/nand
$ fetch <URL>/nandsim.c
$ vi Makefile <= (as in Fedora: Building Only Kernel Modules)
$ make
make -C /lib/modules/3.11.10-301.fc20.x86_64/build M=/home/andreas/src/nand modules
make[1]: Entering directory `/usr/src/kernels/3.11.10-301.fc20.x86_64'
  CC [M]  /home/andreas/src/nand/nandsim.o
/home/andreas/src/nand/nandsim.c: In function ‘alloc_device’:
/home/andreas/src/nand/nandsim.c:581:25: error: ‘FMODE_CAN_READ’ undeclared (first use in this function)
   if (!(cfile->f_mode & FMODE_CAN_READ)) {
                         ^
/home/andreas/src/nand/nandsim.c:581:25: note: each undeclared identifier is reported only once for each function it appears in
/home/andreas/src/nand/nandsim.c:586:25: error: ‘FMODE_CAN_WRITE’ undeclared (first use in this function)
   if (!(cfile->f_mode & FMODE_CAN_WRITE)) {
                         ^
make[2]: *** [/home/andreas/src/nand/nandsim.o] Error 1
make[1]: *** [_module_/home/andreas/src/nand] Error 2
make[1]: Leaving directory `/usr/src/kernels/3.11.10-301.fc20.x86_64'
make: *** [default] Error 2

$ uname -a
Linux nch-w-andreasb.advaoptical.com 3.11.10-301.fc20.x86_64 [...]

$ grep -r FMODE_CAN_READ /usr/src/kernels/3.11.10-301.fc20.x86_64/
<empty>

$ grep -r FMODE_CAN_READ /usr/src/kernels/3.19.8-100.fc20.x86_64
/usr/src/kernels/3.19.8-100.fc20.x86_64/include/linux/fs.h:#define FMODE_CAN_READ          ((__force fmode_t)0x20000)

$ rpm -qa kernel
kernel-3.19.8-100.fc20.x86_64
kernel-3.11.10-301.fc20.x86_64

$ grub2-mkconfig -o /boot/grub2/grub.cfg
$ grub2-install /dev/sda

<Reboot>

$ yum remove kernel-3.11.10-301.fc20.x86_64
$ yum remove kernel-devel-3.11.10-301.fc20.x86_64