diff options
| author |   Weston Andros Adamson <dros@netapp.com> | 2012-05-24 13:22:50 -0400 |
|---|---|---|
| committer |   Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-05-24 16:22:19 -0400 |
| commit | 7c44f1ae4a21458a1ea3d6482ffb3136f1df6d2b (patch) | |
| tree | a66f9b3fb7a5252a87dbcee40562a1e8ed47dc9b /fs/nfs/nfs4proc.c | |
| parent | NFSv4.1 test the mdsthreshold hint parameters (diff) | |
| download | linux-dev-7c44f1ae4a21458a1ea3d6482ffb3136f1df6d2b.tar.xz linux-dev-7c44f1ae4a21458a1ea3d6482ffb3136f1df6d2b.zip | |
nfs4.1: add BIND_CONN_TO_SESSION operation
This patch adds the BIND_CONN_TO_SESSION operation which is needed for
upcoming SP4_MACH_CRED work and useful for recovering from broken connections
without destroying the session.
Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4proc.c')
| -rw-r--r-- | fs/nfs/nfs4proc.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index e725736ff288..e8988c000e7f 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -5100,6 +5100,60 @@ nfs41_same_server_scope(struct nfs41_server_scope *a, } /* + * nfs4_proc_bind_conn_to_session() + * + * The 4.1 client currently uses the same TCP connection for the + * fore and backchannel. + */ +int nfs4_proc_bind_conn_to_session(struct nfs_client *clp) +{ + int status; + struct nfs41_bind_conn_to_session_res res; + struct rpc_message msg = { + .rpc_proc = + &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], + .rpc_argp = clp, + .rpc_resp = &res, + }; + + dprintk("--> %s\n", __func__); + BUG_ON(clp == NULL); + + res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); + if (unlikely(res.session == NULL)) { + status = -ENOMEM; + goto out; + } + + status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); + if (status == 0) { + if (memcmp(res.session->sess_id.data, + clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { + dprintk("NFS: %s: Session ID mismatch\n", __func__); + status = -EIO; + goto out_session; + } + if (res.dir != NFS4_CDFS4_BOTH) { + dprintk("NFS: %s: Unexpected direction from server\n", + __func__); + status = -EIO; + goto out_session; + } + if (res.use_conn_in_rdma_mode) { + dprintk("NFS: %s: Server returned RDMA mode = true\n", + __func__); + status = -EIO; + goto out_session; + } + } +out_session: + kfree(res.session); +out: + dprintk("<-- %s status= %d\n", __func__, status); + return status; +} + +/* * nfs4_proc_exchange_id() * * Since the clientid has expired, all compounds using sessions |