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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-05-26 13:41:04 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-05-26 14:17:31 -0400
commit32b0131069c5bebf52368a9fe170f8d58b78fa8d (patch)
tree540451b739e9938b2f15682a0bab117852bc8e4e /fs/nfs/nfs4xdr.c
parent662455391040a783b89d0232e743c27c23617dbd (diff)
downloadop-kernel-dev-32b0131069c5bebf52368a9fe170f8d58b78fa8d.zip
op-kernel-dev-32b0131069c5bebf52368a9fe170f8d58b78fa8d.tar.gz
NFSv4.1: Don't clobber the seqid if exchange_id returns a confirmed clientid
If the EXCHGID4_FLAG_CONFIRMED_R flag is set, the client is in theory supposed to already know the correct value of the seqid, in which case RFC5661 states that it should ignore the value returned. Also ensure that if the sanity check in nfs4_check_cl_exchange_flags fails, then we must not change the nfs_client fields. Finally, clean up the code: we don't need to retest the value of 'status' unless it can change. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4xdr.c')
-rw-r--r--fs/nfs/nfs4xdr.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index b9ce3fd..ee4a74d 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -5319,7 +5319,6 @@ static int decode_exchange_id(struct xdr_stream *xdr,
uint32_t dummy;
char *dummy_str;
int status;
- struct nfs_client *clp = res->client;
uint32_t impl_id_count;
status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
@@ -5329,12 +5328,12 @@ static int decode_exchange_id(struct xdr_stream *xdr,
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
- xdr_decode_hyper(p, &clp->cl_clientid);
+ xdr_decode_hyper(p, &res->clientid);
p = xdr_inline_decode(xdr, 12);
if (unlikely(!p))
goto out_overflow;
- clp->cl_seqid = be32_to_cpup(p++);
- clp->cl_exchange_flags = be32_to_cpup(p++);
+ res->seqid = be32_to_cpup(p++);
+ res->flags = be32_to_cpup(p++);
/* We ask for SP4_NONE */
dummy = be32_to_cpup(p);
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