diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/tdb/common/lock.c | 8 | ||||
| -rw-r--r-- | lib/tdb/common/open.c | 15 |
2 files changed, 18 insertions, 5 deletions
diff --git a/lib/tdb/common/lock.c b/lib/tdb/common/lock.c index 6f5799a819..19b92d9ae0 100644 --- a/lib/tdb/common/lock.c +++ b/lib/tdb/common/lock.c @@ -675,6 +675,11 @@ bool tdb_have_extra_locks(struct tdb_context *tdb) return true; } + /* We always hold the active lock if CLEAR_IF_FIRST. */ + if (find_nestlock(tdb, ACTIVE_LOCK)) { + extra--; + } + /* In a transaction, we expect to hold the transaction lock */ if (tdb->transaction && find_nestlock(tdb, TRANSACTION_LOCK)) { extra--; @@ -698,8 +703,11 @@ void tdb_release_extra_locks(struct tdb_context *tdb) for (i=0;i<tdb->num_lockrecs;i++) { struct tdb_lock_type *lck = &tdb->lockrecs[i]; + /* Don't release transaction or active locks! */ if (tdb->transaction && lck->off == TRANSACTION_LOCK) { tdb->lockrecs[extra++] = *lck; + } else if (lck->off == ACTIVE_LOCK) { + tdb->lockrecs[extra++] = *lck; } else { tdb_brunlock(tdb, lck->ltype, lck->off, 1); } diff --git a/lib/tdb/common/open.c b/lib/tdb/common/open.c index 1f948ff158..afea5544f9 100644 --- a/lib/tdb/common/open.c +++ b/lib/tdb/common/open.c @@ -250,7 +250,7 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags, /* we need to zero database if we are the only one with it open */ if ((tdb_flags & TDB_CLEAR_IF_FIRST) && (!tdb->read_only) && - (locked = (tdb->methods->brlock(tdb, F_WRLCK, ACTIVE_LOCK, 1, TDB_LOCK_NOWAIT|TDB_LOCK_PROBE) == 0))) { + (locked = (tdb_nest_lock(tdb, ACTIVE_LOCK, F_WRLCK, TDB_LOCK_NOWAIT|TDB_LOCK_PROBE) == 0))) { open_flags |= O_CREAT; if (ftruncate(tdb->fd, 0) == -1) { TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_open_ex: " @@ -313,7 +313,7 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags, tdb->inode = st.st_ino; tdb_mmap(tdb); if (locked) { - if (tdb->methods->brunlock(tdb, F_WRLCK, ACTIVE_LOCK, 1) == -1) { + if (tdb_nest_unlock(tdb, ACTIVE_LOCK, F_WRLCK, false) == -1) { TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: " "failed to release ACTIVE_LOCK on %s: %s\n", name, strerror(errno))); @@ -328,8 +328,9 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags, if (tdb_flags & TDB_CLEAR_IF_FIRST) { /* leave this lock in place to indicate it's in use */ - if (tdb->methods->brlock(tdb, F_RDLCK, ACTIVE_LOCK, 1, TDB_LOCK_WAIT) == -1) + if (tdb_nest_lock(tdb, ACTIVE_LOCK, F_RDLCK, TDB_LOCK_WAIT) == -1) { goto fail; + } } /* if needed, run recovery */ @@ -383,6 +384,7 @@ struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags, if (tdb->fd != -1) if (close(tdb->fd) != 0) TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: failed to close tdb->fd on error!\n")); + SAFE_FREE(tdb->lockrecs); SAFE_FREE(tdb); errno = save_errno; return NULL; @@ -501,8 +503,11 @@ static int tdb_reopen_internal(struct tdb_context *tdb, bool active_lock) tdb_mmap(tdb); #endif /* fake pread or pwrite */ - if (active_lock && - (tdb->methods->brlock(tdb, F_RDLCK, ACTIVE_LOCK, 1, TDB_LOCK_WAIT) == -1)) { + /* We may still think we hold the active lock. */ + tdb->num_lockrecs = 0; + SAFE_FREE(tdb->lockrecs); + + if (active_lock && tdb_nest_lock(tdb, ACTIVE_LOCK, F_RDLCK, TDB_LOCK_WAIT) == -1) { TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_reopen: failed to obtain active lock\n")); goto fail; } |