From: xie xingguo <xie.xingguo@zte.com.cn>
Date: Mon, 26 Jun 2017 01:29:32 +0000 (+0800)
Subject: os/bluestore: make sure min_alloc_size is power of 2 aligned
X-Git-Tag: ses5-milestone8^2~13^2~2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=b83b9018827f781b288c511dbfad2328137f0bc3;p=ceph.git

os/bluestore: make sure min_alloc_size is power of 2 aligned

BlueStore requires that min_alloc_size must be power of 2 aligned.

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
---

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 2e3da75fc144..90886fe00769 100644
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -5077,6 +5077,17 @@ int BlueStore::mkfs()
 	min_alloc_size = cct->_conf->bluestore_min_alloc_size_ssd;
       }
     }
+
+    // make sure min_alloc_size is power of 2 aligned.
+    if (!ISP2(min_alloc_size)) {
+      derr << __func__ << " min_alloc_size 0x"
+           << std::hex << min_alloc_size << std::dec
+           << " is not power of 2 aligned!"
+           << dendl;
+      r = -EINVAL;
+      goto out_close_fm;
+    }
+
     {
       bufferlist bl;
       ::encode((uint64_t)min_alloc_size, bl);