From: Mikhail Pershin <tappro@sun.com>
Date: Thu, 19 Aug 2010 16:36:07 +0000 (+0400)
Subject: b=22906 limit filesystem size for LUN size close to 16TB
X-Git-Tag: 2.0.51.0~59
X-Git-Url: https://git.whamcloud.com/gitweb?a=commitdiff_plain;h=b5a8338cbc9e25e94c50f65f510008c1fbf9dca9;p=fs%2Flustre-release.git

b=22906 limit filesystem size for LUN size close to 16TB

a=adilger
i=zhiqi.tao
i=girish.shilamkar
---

diff --git a/lustre/utils/mkfs_lustre.c b/lustre/utils/mkfs_lustre.c
index 28c3806..bcdfc29 100644
--- a/lustre/utils/mkfs_lustre.c
+++ b/lustre/utils/mkfs_lustre.c
@@ -587,6 +587,11 @@ int make_lustre_backfs(struct mkfs_opts *mop)
                         return EINVAL;
                 }
                 block_count = mop->mo_device_sz / (L_BLOCK_SIZE >> 10);
+                /* If the LUN size is just over 2^32 blocks, limit the
+                 * filesystem size to 2^32-1 blocks to avoid problems with
+                 * ldiskfs/mkfs not handling this size.  Bug 22906 */
+                if (block_count > 0xffffffffULL && block_count < 0x100002000ULL)
+                        block_count = 0xffffffffULL;
         }
 
         if ((mop->mo_ldd.ldd_mount_type == LDD_MT_EXT3) ||