git: sys/vfs/hammer2: Make sure PFS exists after chain lookup on mount

[Tomohiro Kusumi]

commit 16f0b63d7f4227452a2862aeb25d06a5fa10ca1a
Author: Tomohiro Kusumi <tkusumi at netbsd.org>
Date:   Tue Sep 27 01:02:52 2022 -0700

    sys/vfs/hammer2: Make sure PFS exists after chain lookup on mount
    
    If pmp is NULL at this point, it panics, so return EINVAL.
    
    What makes the existing code complicated is pmp could have already
    been found via @label matching about 300 lines above, regardless of
    chain lookup result right before this diff.
    
    So return EINVAL on `pmp == NULL` rather than `chain->error != 0`.
    In any case, something is wrong if chain lookup failed despite pmp.

Summary of changes:
 sys/vfs/hammer2/hammer2_vfsops.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/16f0b63d7f4227452a2862aeb25d06a5fa10ca1a


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