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NFSv4.1: fix handling of backchannel binding in BIND_CONN_TO_SESSION

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Currently, if the client sends BIND_CONN_TO_SESSION with
NFS4_CDFC4_FORE_OR_BOTH but only gets NFS4_CDFS4_FORE back it ignores
that it wasn't able to enable a backchannel.

To make sure, the client sends BIND_CONN_TO_SESSION as the first
operation on the connections (ie., no other session compounds haven't
been sent before), and if the client's request to bind the backchannel
is not satisfied, then reset the connection and retry.

Cc: stable@vger.kernel.org
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Olga Kornievskaia
2020-04-24 17:45:50 -04:00
committed by Trond Myklebust
parent 7c4310ff56
commit dff58530c4
3 changed files with 15 additions and 0 deletions
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2
include/linux/nfs_xdr.h
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@@ -1317,11 +1317,13 @@ struct nfs41_impl_id {
struct nfstime4 date;
};
#define MAX_BIND_CONN_TO_SESSION_RETRIES 3
struct nfs41_bind_conn_to_session_args {
struct nfs_client *client;
struct nfs4_sessionid sessionid;
u32 dir;
bool use_conn_in_rdma_mode;
int retries;
};
struct nfs41_bind_conn_to_session_res {