[LU-6071] LBUG during mkdir -i 1 from 2.6.0 client to 2.5.3 server

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.7.0
• Affects Version/s: Lustre 2.6.0, Lustre 2.5.3
• Labels: HB mq115 patch

Environment

Patchless client from branch b2_6
07-19-2014 Intel Corporation
* version 2.6.0

Server from b2_5 (e835226b17309ec21fd7b46cf397e5fd557049bd)
09-03-2014 Intel Corporation
       * version 2.5.3

• Severity: 3
• Assignee: Di Wang
• Reporter: Artem Blagodarenko (Inactive)

Description

 kernel:LustreError: 3652:0:(mdt_handler.c:2706:mdt_object_lock0()) ASSERTION( !(ibits & (MDS_INODELOCK_UPDATE | MDS_INODELOCK_PERM)) ) failed: lustre-MDT0001: wrong bit 0x2 for remote obj [0x200000007:0x1:0x0]
 kernel:LustreError: 3652:0:(mdt_handler.c:2706:mdt_object_lock0()) LBUG

To reproduce the issue two-node cluster is enough.

On server:

#MDSCOUNT=3 lustre/tests/llmount.sh
#lctl set_param mdt.*.enable_remote_dir=1
#lctl set_param mdt.*.enable_remote_dir_gid=1122

Client

#mount -t lustre 172.16.157.136@tcp0:/lustre /mnt/lustre
#lustre/utils/lfs mkdir -i 1 /mnt/lustre/mdt1

Server is failed with LBUG above.