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NFSv4.1: nfs4_proc_bind_conn_to_session must iterate over all connections 

Use the new helper to ensure that nfs4_proc_bind_conn_to_session() is called
for all connections.
However ensure that we only set the backchannel flag for the connection
pointed to by rpc_clnt->cl_xprt.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2016-01-30 22:58:24 -05:00
parent 15001e5a7e
commit d9ddbf5d92
1 changed files with 48 additions and 3 deletions
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51
fs/nfs/nfs4proc.c
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@ -6783,12 +6783,16 @@ nfs41_same_server_scope(struct nfs41_server_scope *a,
}
/*
* nfs4_proc_bind_conn_to_session()
* nfs4_proc_bind_one_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, struct rpc_cred *cred)
static
int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
struct rpc_xprt *xprt,
struct nfs_client *clp,
struct rpc_cred *cred)
{
int status;
struct nfs41_bind_conn_to_session_args args = {
@ -6803,6 +6807,13 @@ int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred
.rpc_resp = &res,
.rpc_cred = cred,
};
struct rpc_task_setup task_setup_data = {
.rpc_client = clnt,
.rpc_xprt = xprt,
.rpc_message = &msg,
.flags = RPC_TASK_TIMEOUT,
};
struct rpc_task *task;
dprintk("--> %s\n", __func__);
@ -6810,7 +6821,16 @@ int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred
if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
args.dir = NFS4_CDFC4_FORE;
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
/* Do not set the backchannel flag unless this is clnt->cl_xprt */
if (xprt != rcu_access_pointer(clnt->cl_xprt))
args.dir = NFS4_CDFC4_FORE;
task = rpc_run_task(&task_setup_data);
if (!IS_ERR(task)) {
status = task->tk_status;
rpc_put_task(task);
} else
status = PTR_ERR(task);
trace_nfs4_bind_conn_to_session(clp, status);
if (status == 0) {
if (memcmp(res.sessionid.data,
@ -6837,6 +6857,31 @@ int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred
return status;
}
struct rpc_bind_conn_calldata {
struct nfs_client *clp;
struct rpc_cred *cred;
};
static int
nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
struct rpc_xprt *xprt,
void *calldata)
{
struct rpc_bind_conn_calldata *p = calldata;
return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
}
int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
{
struct rpc_bind_conn_calldata data = {
.clp = clp,
.cred = cred,
};
return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
nfs4_proc_bind_conn_to_session_callback, &data);
}
/*
* Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
* and operations we'd like to see to enable certain features in the allow map