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

[Jaegeuk Kim <jaegeuk@kernel.org>]

On 04/01, beroal wrote:
> On 31.03.21 18:48, Jaegeuk Kim wrote:
> > 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.
> Resizing was done by Gparted. I don't remember precisely, but the previous
> partition size was around 65536 MiB, and the F2FS used the whole partition.
> The new size most likely was the current size of the partition, 79549 MiB.

Ah, you didn't call resize.f2fs, but just changed the partition size?


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