On 05/13, Chao Yu wrote:
> On 5/13/25 10:19, Eric Sandeen wrote:
> > On 5/11/25 10:43 PM, Chao Yu wrote:
> >> On 5/8/25 23:59, Eric Sandeen wrote:
> >>> On 5/8/25 4:19 AM, Chao Yu wrote:
> >>>>> @@ -2645,21 +2603,11 @@ static int f2fs_remount(struct
> >>>>> super_block *sb, int *flags, char *data)
> >>>>>
> >>>>> default_options(sbi, true);
> >>>>>
> >>>>> - memset(&fc, 0, sizeof(fc)); - memset(&ctx, 0, sizeof(ctx));
> >>>>> - fc.fs_private = &ctx; - fc.purpose =
> >>>>> FS_CONTEXT_FOR_RECONFIGURE; - - /* parse mount options */ -
> >>>>> err = parse_options(&fc, data); - if (err) - goto
> >>>>> restore_opts;
> >>>> There is a retry flow during f2fs_fill_super(), I intenionally
> >>>> inject a fault into f2fs_fill_super() to trigger the retry flow,
> >>>> it turns out that mount option may be missed w/ below testcase:
> >>>
> >>> I never did understand that retry logic (introduced in ed2e621a95d
> >>> long ago). What errors does it expect to be able to retry, with
> >>> success?
> >>
> >> IIRC, it will retry mount if there is recovery failure due to
> >> inconsistent metadata.
> >
> > Sure, I just wonder what would cause inconsistent metadata to become
> > consistent
> > after 1 retry ...
>
> I don't remember, Jaegeuk, do you remember?
I remember, if the roll-forward recovery ended up with an error, we had better
retry mount() as we may have some online fixes.
>
> Thanks,
>
> >
> >>>
> >>> Anyway ...
> >>>
> >>> Can you show me (as a patch) exactly what you did to trigger the
> >>> retry, just so we are looking at the same thing?
> >>
> >> You can try this?
> >
> > Ok, thanks!
> > -Eric
> >
> >> --- fs/f2fs/super.c | 6 ++++++ 1 file changed, 6 insertions(+)
> >>
> >> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index
> >> 0ee783224953..10f0e66059f8 100644 --- a/fs/f2fs/super.c +++ b/fs/
> >> f2fs/super.c @@ -5066,6 +5066,12 @@ static int
> >> f2fs_fill_super(struct super_block *sb, struct fs_context *fc) goto
> >> reset_checkpoint; }
> >>
> >> + if (retry_cnt) { + err = -EIO; + skip_recovery =
> >> true; + goto
> >> free_meta; + } + /* recover fsynced data */ if (!test_opt(sbi,
> >> DISABLE_ROLL_FORWARD) && !test_opt(sbi, NORECOVERY)) {
> >
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