If an individual object is clean, record it in the missing_digest map.
If not, leave it out.  This lets us drop the old condition that only
recorded any digests if the entire scrub chunk was clean.

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit c39e0e5)

We cannot assume that the auth info has the "known" digest; all replicas
may have a matching digest that does not match the oi, or we may choose
a different auth info for some other reason.  Verify that the digest
matches the oi before calling it "known".

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 546d1c7)

The scrubber.seed value is set based on the peer feature; check for that
too explicitly, and assert the scrubber.seed value matches.

No change in behavior here.

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit e34d31b)

This is a better place for it.  While we are here, change the wording to
clearly call out the 'recorded' digest (from object_info_t) vs the 'on
disk' digest (what we observed during scrub).

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit cf349ff)

If the recorded digest does not match the replicas, and all replicas
match, then (on repair) fix the recorded digest.

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit f581fec)

If we really can't find a suitable auth, log an error.

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit a476d8f)

The fallback behavior was printing a promising message but then doing
a 'continue' and not actually scrubbing the object.  Instead, fall back to
a less-bad auth inside be_select_auth_object.

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit b597db5)

We may have an error to log even though the authoritative map is empty:
when we have a digest that doesn't match all replicas.

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit d23766b)

We may log more than one of these in a scrubmap; make sure they are
not concatenated.

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 2b3dd1b)