Commit 4f0b429d authored May 20, 2013 by Trond Myklebust

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 <Trond.Myklebust@netapp.com>

parent cd5875fe

fs/nfs/nfs4proc.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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