From 4f0b429df104c8ab41fa1b3013e13e0f95f3da52 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 20 May 2013 12:24:03 -0400 Subject: [PATCH] NFSv4.1: Enable state protection Use the EXCHGID4_FLAG_BIND_PRINC_STATEID exchange_id flag to enable stateid protection. This means that if we create a stateid using a particular principal, then we must use the same principal if we want to change that state. IOW: if we OPEN a file using a particular credential, then we have to use the same credential in subsequent OPEN_DOWNGRADE, CLOSE, or DELEGRETURN operations that use that stateid. Signed-off-by: Trond Myklebust --- fs/nfs/nfs4proc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 98f0df3ee50d..7490359f6c60 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -5528,7 +5528,8 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) struct nfs41_exchange_id_args args = { .verifier = &verifier, .client = clp, - .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER, + .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | + EXCHGID4_FLAG_BIND_PRINC_STATEID, }; struct nfs41_exchange_id_res res = { 0 -- 2.39.2