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staging: lustre: nfs: don't panic NFS server if MDS fails to find FID 

When MDS fails to retrive the parent's fid, we'd handle it without
crashing the NFS server.

Signed-off-by: Bobi Jam <bobijam.xu@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3952
Reviewed-on: http://review.whamcloud.com/8459
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bobi Jam 2016-05-04 10:28:52 -04:00 committed by Greg Kroah-Hartman
parent 4096e645d8
commit 1e5a6fa966
1 changed files with 8 additions and 5 deletions
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9
drivers/staging/lustre/lustre/llite/llite_nfs.c
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@ -322,11 +322,14 @@ static struct dentry *ll_get_parent(struct dentry *dchild)
return ERR_PTR(rc);
}
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
LASSERT(body->valid & OBD_MD_FLID);
/*
* LU-3952: MDT may lost the FID of its parent, we should not crash
* the NFS server, ll_iget_for_nfs() will handle the error.
*/
if (body->valid & OBD_MD_FLID) {
CDEBUG(D_INFO, "parent for " DFID " is " DFID "\n",
PFID(ll_inode2fid(dir)), PFID(&body->fid1));
}
result = ll_iget_for_nfs(dir->i_sb, &body->fid1, NULL);
ptlrpc_req_finished(req);