os/bluestore: fix crash caused by dividing by 0

In Allocator::create() => ZonedAllocator::ZonedAllocator()
num_zones is calculated by size / zone_size,
causing a crash when zone_size is set to 0

Signed-off-by: Jrchyang Yu <yuzhiqiang_yewu@cmss.chinamobile.com>
(cherry picked from commit 4364ebdfa4a218a61528f7579e45233cc4725326)

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 5346773ab5be73b597ad894890ce7615963d30a1..292e00b250e8a2378d5d965754edeef40d79ee4c 100644 (file)
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -5793,7 +5793,7 @@ int BlueStore::_create_alloc()
       cct, cct->_conf->bluestore_allocator,
       bdev->get_conventional_region_size(),
       alloc_size,
-      0, 0,
+      zone_size, 0,
       "zoned_block");
     if (!a) {
       lderr(cct) << __func__ << " failed to create " << cct->_conf->bluestore_allocator