I'm attempting to get a YAFFS2 filesystem to work on a NAND that I am
simulating in QEMU using the NAND simulator code in the mainline kernel.
I can mount my simulated NAND device (via its MTD block device) without any
errors ($ mount -t yaffs2 /dev/mtdblock0 /mnt/yfs). I can create files and
everything seems to be working well. I can put debugging printk()s in the
source for nandsim.c and see that the write and read functions are in fact
getting called and returning successfully. I also have MTD debugging tunred
on (level 3) and its output seems to looks okay to me. Everything seems
fine.
However, when I unmount the filesystem and then mount it again, nothing
resides in the filesystem except lost+found.
This happens both when I:
1.) Mount the filesystem without doing any kind of formatting to the
partition (simulated NAND) before mounting it, unmount, and then remount
2.) When I run mkyaffs2 (modified version of mkyaffs for LP NANDs) with no
image to write and then mount the filesystem, umount, and remount
I am not shutting down the QEMU emulator between mounts, because everything
would obviously go away then (simulated NAND is in RAM).
Has anyone experienced this before and/or would be willing to offer
suggestions?
Thanks in advance,
Ross S.
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