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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>
This commit is contained in:
Trond Myklebust 2013-05-20 12:24:03 -04:00
parent cd5875fefe
commit 4f0b429df1
1 changed files with 2 additions and 1 deletions
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3
fs/nfs/nfs4proc.c
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@ -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 = {
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