diff options
Diffstat (limited to 'lib/mnesia/src')
| -rw-r--r-- | lib/mnesia/src/mnesia_locker.erl | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/mnesia/src/mnesia_locker.erl b/lib/mnesia/src/mnesia_locker.erl index 9822dfd116..2025a2ab37 100644 --- a/lib/mnesia/src/mnesia_locker.erl +++ b/lib/mnesia/src/mnesia_locker.erl @@ -689,6 +689,7 @@ w_nodes(Tab) -> %% only take a write lock if we see a majority of the %% nodes. + check_majority(true, Tab, HaveNs) -> check_majority(Tab, HaveNs); check_majority(false, _, _) -> @@ -732,6 +733,7 @@ sticky_lock(Tid, Store, {Tab, Key} = Oid, Lock) -> end. do_sticky_lock(Tid, Store, {Tab, Key} = Oid, Lock) -> + sticky_check_majority(Lock, Tab), ?MODULE ! {self(), {test_set_sticky, Tid, Oid, Lock}}, N = node(), receive @@ -761,6 +763,22 @@ do_sticky_lock(Tid, Store, {Tab, Key} = Oid, Lock) -> dirty_sticky_lock(Tab, Key, [N], Lock) end. +sticky_check_majority(read, _) -> + ok; +sticky_check_majority(write, Tab) -> + case ?catch_val({Tab, majority}) of + true -> + HaveNodes = val({Tab, where_to_write}), + case mnesia_lib:have_majority(Tab, HaveNodes) of + true -> + ok; + false -> + mnesia:abort({no_majority, Tab}) + end; + _ -> + ok + end. + not_stuck(Tid, Store, Tab, _Key, Oid, _Lock, N) -> rlock(Tid, Store, {Tab, ?ALL}), %% needed? wlock(Tid, Store, Oid), %% perfect sync |