From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Fri, 2 Oct 2015 15:44:54 +0000 (-0400)
Subject: NFSv4.1: nfs4_opendata_check_deleg needs to handle NFS4_OPEN_CLAIM_DELEG_CUR_FH
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=72d79ff83c34d430a9f7f72c45717905762ef4d9;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

NFSv4.1: nfs4_opendata_check_deleg needs to handle NFS4_OPEN_CLAIM_DELEG_CUR_FH

We need to warn against broken NFSv4.1 servers that try to hand out
delegations in response to NFS4_OPEN_CLAIM_DELEG_CUR_FH.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index f93b9cdb4934..12e9808d5df0 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1458,12 +1458,18 @@ nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
 	if (delegation)
 		delegation_flags = delegation->flags;
 	rcu_read_unlock();
-	if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
+	switch (data->o_arg.claim) {
+	default:
+		break;
+	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
+	case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 		pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
 				   "returning a delegation for "
 				   "OPEN(CLAIM_DELEGATE_CUR)\n",
 				   clp->cl_hostname);
-	} else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
+		return;
+	}
+	if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
 		nfs_inode_set_delegation(state->inode,
 					 data->owner->so_cred,
 					 &data->o_res);