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roots: do not accept 18446744073709551615 as max_transid in beescrawl.dat

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Due to an earlier bug some beescrawl.dat files will contain uint64_t
max as max_transid.  This prevents any further scanning on the subvol
because there is no possibiity of having a real transid (or any other
uint64_t number) larger than uint64_t max.

If we detect a bad transid in beescrawl.dat, log a warning, then use
some more plausible value:  either min_transid to repeat the previous
incremental crawl, or 0 to restart the subvol scan from the beginning.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell 2018-10-19 02:09:09 -04:00
parent 90132182fd
commit 866a35c7fb
1 changed files with 10 additions and 0 deletions
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10
src/bees-roots.cc
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@ -527,6 +527,16 @@ BeesRoots::state_load()
loaded_state.m_started = d.at("started");
}
BEESLOGDEBUG("loaded_state " << loaded_state);
if (loaded_state.m_min_transid == numeric_limits<uint64_t>::max()) {
BEESLOGWARN("WARNING: root " << loaded_state.m_root << ": bad min_transid " << loaded_state.m_min_transid << ", resetting to 0");
loaded_state.m_min_transid = 0;
BEESCOUNT(bug_bad_min_transid);
}
if (loaded_state.m_max_transid == numeric_limits<uint64_t>::max()) {
BEESLOGWARN("WARNING: root " << loaded_state.m_root << ": bad max_transid " << loaded_state.m_max_transid << ", resetting to " << loaded_state.m_min_transid);
loaded_state.m_max_transid = loaded_state.m_min_transid;
BEESCOUNT(bug_bad_max_transid);
}
insert_root(loaded_state);
}
}