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| author | Volker Lendecke <vl@samba.org> | 2012-01-06 17:19:54 +0100 |
|---|---|---|
| committer | Volker Lendecke <vlendec@samba.org> | 2012-01-18 14:48:04 +0100 |
| commit | 45e61fcf61ed9863fbe2b116fe0763fc139bbe0d (patch) | |
| tree | 06ea9ead2285b4a671d102edb8824422f7325703 /source3/smbd | |
| parent | e75c436fe6a9ee44f6adc744b6269e99f4920431 (diff) | |
| download | samba-45e61fcf61ed9863fbe2b116fe0763fc139bbe0d.tar.gz samba-45e61fcf61ed9863fbe2b116fe0763fc139bbe0d.tar.bz2 samba-45e61fcf61ed9863fbe2b116fe0763fc139bbe0d.zip | |
s3: Add a "lock_order" argument to db_open
This will be used to enforce a lock hierarchy between the databases. We have
seen deadlocks between locking.tdb, brlock.tdb, serverid.tdb and notify*.tdb.
These should be fixed by refusing a dbwrap_fetch_locked that does not follow a
defined lock hierarchy.
Diffstat (limited to 'source3/smbd')
| -rw-r--r-- | source3/smbd/notify_internal.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/source3/smbd/notify_internal.c b/source3/smbd/notify_internal.c index 484a31c5be..be91cd58cd 100644 --- a/source3/smbd/notify_internal.c +++ b/source3/smbd/notify_internal.c @@ -102,7 +102,8 @@ struct notify_context *notify_init(TALLOC_CTX *mem_ctx, struct server_id server, notify->db_recursive = db_open(notify, lock_path("notify.tdb"), 0, TDB_SEQNUM|TDB_CLEAR_IF_FIRST|TDB_INCOMPATIBLE_HASH, - O_RDWR|O_CREAT, 0644); + O_RDWR|O_CREAT, 0644, + DBWRAP_LOCK_ORDER_2); if (notify->db_recursive == NULL) { talloc_free(notify); return NULL; @@ -110,7 +111,8 @@ struct notify_context *notify_init(TALLOC_CTX *mem_ctx, struct server_id server, notify->db_onelevel = db_open(notify, lock_path("notify_onelevel.tdb"), 0, TDB_CLEAR_IF_FIRST|TDB_INCOMPATIBLE_HASH, - O_RDWR|O_CREAT, 0644); + O_RDWR|O_CREAT, 0644, + DBWRAP_LOCK_ORDER_2); if (notify->db_onelevel == NULL) { talloc_free(notify); return NULL; |