On 11/21, Eric Sandeen wrote:
> On 11/20/24 2:38 PM, Jaegeuk Kim wrote:
> > On 11/20, Eric Sandeen wrote:
>
> ...
>
> >> (Note that f2fs is the only filesystem that attempts to handle lazytime
> >> within
> >> the filesystem itself):
> >>
> >> [linux]# grep -r \"lazytime\" fs/*/
> >> fs/f2fs/super.c: {Opt_lazytime, "lazytime"},
> >> [linux]#
> >>
> >> I'm not entirely sure how to untangle all this, but regressions are not
> >> acceptable,
> >> so please revert my commit for now.
> >
> > Thanks for the explanation. At a glance, I thought it's caused that f2fs
> > doesn't
> > implement fs_context_operations. We'll take a look at how to support it.
>
> (cc: list trimmed)
>
> I had thought the conversion would resolve this too, but had not considered
> direct
> mount(2) calls passing the string in, which is something that probably needs
> to be
> supported even after the conversion, sadly.
>
> As a reminder, this might be a start / sketch of how to convert to the new
> mount API:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/sandeen/linux.git/log/?h=f2fs-mount-api
>
> It's not entirely correct, but at least the first several patches are
> probably the right
> idea - getting sb / sbi out of the parsing path, and deferring
> option-vs-disk-feature
> checks until after the superblock is read, etc.
>
> The final patch is probably not the way to go - it allocates an entire
> f2fs_sb_info
> in f2fs_init_fs_context - it probably makes more sense to create a new context
> structure which holds only mount options, which is then transferred into the
> sbi after option parsing during mount or remount.
Cool. Let us take a look at them soon. Thank you!
>
> I was doing these conversions as a side project, and given the f2fs conversion
> complexity, I have yet to get to a series that I'm happy with. Perhaps expert
> eyes can help!
>
> Thanks,
> -Eric
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