return fcntl(tdb->fd, F_SETLKW, &fl);
}
+/* list -1 is the alloc list, otherwise a hash chain. */
+static tdb_off_t lock_offset(int list)
+{
+ return FREELIST_TOP + 4*list;
+}
+
/* a byte range locking function - return 0 on success
this functions locks/unlocks 1 byte at the specified offset.
return -1;
}
+ /* Sanity check */
+ if (tdb->transaction && offset >= lock_offset(-1) && len != 0) {
+ tdb->ecode = TDB_ERR_RDONLY;
+ TDB_LOG((tdb, TDB_DEBUG_TRACE, "tdb_brlock attempted in transaction at offset %d rw_type=%d flags=%d len=%d\n",
+ offset, rw_type, flags, (int)len));
+ return -1;
+ }
+
do {
ret = fcntl_lock(tdb, rw_type, offset, len,
flags & TDB_LOCK_WAIT);
return -1;
}
-/* list -1 is the alloc list, otherwise a hash chain. */
-static tdb_off_t lock_offset(int list)
-{
- return FREELIST_TOP + 4*list;
-}
-
static struct tdb_lock_type *find_nestlock(struct tdb_context *tdb,
tdb_off_t offset)
{
/* Since fcntl locks don't nest, we do a lock for the first one,
and simply bump the count for future ones */
- if (tdb->methods->brlock(tdb, ltype, offset, 1, flags)) {
+ if (tdb_brlock(tdb, ltype, offset, 1, flags)) {
return -1;
}
if (mark_lock) {
ret = 0;
} else {
- ret = tdb->methods->brunlock(tdb, ltype, offset, 1);
+ ret = tdb_brunlock(tdb, ltype, offset, 1);
}
/*
return -1;
}
- if (tdb->methods->brlock(tdb, ltype, FREELIST_TOP, 0, flags)) {
+ if (tdb_brlock(tdb, ltype, FREELIST_TOP, 0, flags)) {
if (flags & TDB_LOCK_WAIT) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_lockall failed (%s)\n", strerror(errno)));
}
return 0;
}
- if (!mark_lock &&
- tdb->methods->brunlock(tdb, ltype, FREELIST_TOP, 0)) {
+ if (!mark_lock && tdb_brunlock(tdb, ltype, FREELIST_TOP, 0)) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_unlockall failed (%s)\n", strerror(errno)));
return -1;
}
if (tdb->allrecord_lock.count) {
return 0;
}
- return off ? tdb->methods->brlock(tdb, F_RDLCK, off, 1, TDB_LOCK_WAIT) : 0;
+ return off ? tdb_brlock(tdb, F_RDLCK, off, 1, TDB_LOCK_WAIT) : 0;
}
/*
}
return -1;
}
- return tdb->methods->brlock(tdb, F_WRLCK, off, 1, TDB_LOCK_NOWAIT|TDB_LOCK_PROBE);
+ return tdb_brlock(tdb, F_WRLCK, off, 1, TDB_LOCK_NOWAIT|TDB_LOCK_PROBE);
}
int tdb_write_unlock_record(struct tdb_context *tdb, tdb_off_t off)
if (tdb->allrecord_lock.count) {
return 0;
}
- return tdb->methods->brunlock(tdb, F_WRLCK, off, 1);
+ return tdb_brunlock(tdb, F_WRLCK, off, 1);
}
/* fcntl locks don't stack: avoid unlocking someone else's */
for (i = &tdb->travlocks; i; i = i->next)
if (i->off == off)
count++;
- return (count == 1 ? tdb->methods->brunlock(tdb, F_RDLCK, off, 1) : 0);
+ return (count == 1 ? tdb_brunlock(tdb, F_RDLCK, off, 1) : 0);
}
bool tdb_have_extra_locks(struct tdb_context *tdb)
return 0;
}
-/*
- brlock during a transaction - ignore them
-*/
-static int transaction_brlock(struct tdb_context *tdb,
- int rw_type, tdb_off_t offset, size_t len,
- enum tdb_lock_flags flags)
-{
- /* FIXME: We actually grab the open lock during a transaction. */
- if (offset == OPEN_LOCK)
- return tdb_brlock(tdb, rw_type, offset, len, flags);
- return 0;
-}
-
-static int transaction_brunlock(struct tdb_context *tdb,
- int rw_type, tdb_off_t offset, size_t len)
-{
- return 0;
-}
-
static const struct tdb_methods transaction_methods = {
transaction_read,
transaction_write,
transaction_next_hash_chain,
transaction_oob,
transaction_expand_file,
- transaction_brlock,
- transaction_brunlock
};
/*