Re: [f2fs-dev] `mount` reports an error, but `fsck.f2fs` does not

[Jaegeuk Kim <jaegeuk@kernel.org>]

On 03/31, beroal wrote:
> On 31.03.21 04:41, Jaegeuk Kim wrote:
> > Hi,
> > 
> > On 03/27, beroal wrote:
> > > Ping.
> > > 
> > > On 20.03.21 00:46, beroal wrote:
> > > > Hi. After I extended a partition containing F2FS with a recent version
> > > > of Gparted, the partition no longer mounts. `mount` reports an error,
> > > > but `fsck.f2fs` does not see any problem (well, except for `Invalid CP
> > > > CRC offset: 0`) and does not fix the file system.
> > > > 
> > > > ```
> > > > losetup /dev/loop0 arch-os.img
> > > > mount -t f2fs -o ro /dev/loop0 /root/mnt/temp
> > > > ```
> > > > 
> > > > ```
> > > > [ 6890.647749] F2FS-fs (loop0): Wrong valid_user_blocks: 16040048,
> > > > user_block_count: 10016768
> > > > [ 6890.647808] F2FS-fs (loop0): Failed to get valid F2FS checkpoint
> > > > ```
> > > > 
> > > > ```
> > > > losetup -d /dev/loop0
> > > > fsck.f2fs arch-os.img
> > May I ask run this?
> > 
> > # fsck.f2fs -d 3 arch-os.img?
> The result is a log of size 270 MB. I'll send it privately to
> jaegeuk@kernel.org if you don't mind. It contains directory and file names.

Thanks.

segment_count_main                      [0x    9a95 : 39573]
-> 39573 * 2MB = 78GB as user space

overprov_segment_count                  [0x    4e29 : 20009]
-> 20009 * 2MB = 40GB as overprovisioned space which user can't see.

But,

[FSCK] valid_block_count matching with CP             [Ok..] [0xf4c070]
-> 0xf4c070 = 16040048

valid_block_count                       [0x  f4c070 : 16040048]
-> So, this is correct.

So, I suspect overprovisioned space is wrong and guess resize.f2fs assigned
a wrong value. May I ask from and to which capacities you resized? I may
need to reproduce it quickly.

> 
> 
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