NFSv4: Refactor _nfs4_proc_exchange_id()
Tease apart the functionality in nfs4_exchange_id_done() so that it is easier to debug exchange id vs trunking issues by moving all the processing out of nfs4_exchange_id_done() and into the callers. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust
parent
aae4e7a8bc
commit
9c760d1fd5
@ -7403,72 +7403,8 @@ static int nfs4_sp4_select_mode(struct nfs_client *clp,
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struct nfs41_exchange_id_data {
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struct nfs41_exchange_id_res res;
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struct nfs41_exchange_id_args args;
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struct rpc_xprt *xprt;
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int rpc_status;
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};
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static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
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{
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struct nfs41_exchange_id_data *cdata =
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(struct nfs41_exchange_id_data *)data;
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struct nfs_client *clp = cdata->args.client;
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int status = task->tk_status;
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trace_nfs4_exchange_id(clp, status);
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if (status == 0)
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status = nfs4_check_cl_exchange_flags(cdata->res.flags);
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if (cdata->xprt && status == 0) {
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status = nfs4_detect_session_trunking(clp, &cdata->res,
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cdata->xprt);
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goto out;
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}
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if (status == 0)
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status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
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if (status == 0) {
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clp->cl_clientid = cdata->res.clientid;
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clp->cl_exchange_flags = cdata->res.flags;
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clp->cl_seqid = cdata->res.seqid;
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/* Client ID is not confirmed */
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if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R))
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clear_bit(NFS4_SESSION_ESTABLISHED,
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&clp->cl_session->session_state);
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kfree(clp->cl_serverowner);
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clp->cl_serverowner = cdata->res.server_owner;
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cdata->res.server_owner = NULL;
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/* use the most recent implementation id */
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kfree(clp->cl_implid);
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clp->cl_implid = cdata->res.impl_id;
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cdata->res.impl_id = NULL;
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if (clp->cl_serverscope != NULL &&
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!nfs41_same_server_scope(clp->cl_serverscope,
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cdata->res.server_scope)) {
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dprintk("%s: server_scope mismatch detected\n",
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__func__);
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set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
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kfree(clp->cl_serverscope);
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clp->cl_serverscope = NULL;
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}
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if (clp->cl_serverscope == NULL) {
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clp->cl_serverscope = cdata->res.server_scope;
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cdata->res.server_scope = NULL;
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}
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/* Save the EXCHANGE_ID verifier session trunk tests */
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memcpy(clp->cl_confirm.data, cdata->args.verifier.data,
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sizeof(clp->cl_confirm.data));
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}
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out:
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cdata->rpc_status = status;
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return;
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}
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static void nfs4_exchange_id_release(void *data)
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{
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struct nfs41_exchange_id_data *cdata =
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@ -7482,7 +7418,6 @@ static void nfs4_exchange_id_release(void *data)
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}
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static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
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.rpc_call_done = nfs4_exchange_id_done,
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.rpc_release = nfs4_exchange_id_release,
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};
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@ -7491,7 +7426,8 @@ static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
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*
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* Wrapper for EXCHANGE_ID operation.
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*/
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static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
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static struct rpc_task *
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nfs4_run_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
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u32 sp4_how, struct rpc_xprt *xprt)
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{
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struct rpc_message msg = {
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@ -7505,17 +7441,15 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
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.flags = RPC_TASK_TIMEOUT,
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};
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struct nfs41_exchange_id_data *calldata;
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struct rpc_task *task;
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int status;
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if (!atomic_inc_not_zero(&clp->cl_count))
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return -EIO;
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return ERR_PTR(-EIO);
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status = -ENOMEM;
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calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
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if (!calldata) {
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nfs_put_client(clp);
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return -ENOMEM;
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}
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if (!calldata)
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goto out;
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nfs4_init_boot_verifier(clp, &calldata->args.verifier);
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@ -7554,7 +7488,6 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
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goto out_impl_id;
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}
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if (xprt) {
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calldata->xprt = xprt;
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task_setup_data.rpc_xprt = xprt;
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task_setup_data.flags |= RPC_TASK_SOFTCONN;
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memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
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@ -7573,15 +7506,7 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
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msg.rpc_resp = &calldata->res;
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task_setup_data.callback_data = calldata;
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task = rpc_run_task(&task_setup_data);
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if (IS_ERR(task))
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return PTR_ERR(task);
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status = calldata->rpc_status;
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rpc_put_task(task);
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out:
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return status;
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return rpc_run_task(&task_setup_data);
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out_impl_id:
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kfree(calldata->res.impl_id);
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@ -7591,8 +7516,69 @@ out_server_owner:
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kfree(calldata->res.server_owner);
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out_calldata:
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kfree(calldata);
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out:
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nfs_put_client(clp);
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goto out;
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return ERR_PTR(status);
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}
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/*
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* _nfs4_proc_exchange_id()
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*
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* Wrapper for EXCHANGE_ID operation.
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*/
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static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
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u32 sp4_how)
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{
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struct rpc_task *task;
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struct nfs41_exchange_id_args *argp;
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struct nfs41_exchange_id_res *resp;
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int status;
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task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
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if (IS_ERR(task))
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return PTR_ERR(task);
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argp = task->tk_msg.rpc_argp;
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resp = task->tk_msg.rpc_resp;
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status = task->tk_status;
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if (status != 0)
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goto out;
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status = nfs4_check_cl_exchange_flags(resp->flags);
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if (status != 0)
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goto out;
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status = nfs4_sp4_select_mode(clp, &resp->state_protect);
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if (status != 0)
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goto out;
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clp->cl_clientid = resp->clientid;
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clp->cl_exchange_flags = resp->flags;
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clp->cl_seqid = resp->seqid;
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/* Client ID is not confirmed */
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if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
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clear_bit(NFS4_SESSION_ESTABLISHED,
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&clp->cl_session->session_state);
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if (clp->cl_serverscope != NULL &&
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!nfs41_same_server_scope(clp->cl_serverscope,
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resp->server_scope)) {
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dprintk("%s: server_scope mismatch detected\n",
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__func__);
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set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
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}
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swap(clp->cl_serverowner, resp->server_owner);
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swap(clp->cl_serverscope, resp->server_scope);
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swap(clp->cl_implid, resp->impl_id);
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/* Save the EXCHANGE_ID verifier session trunk tests */
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memcpy(clp->cl_confirm.data, argp->verifier.data,
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sizeof(clp->cl_confirm.data));
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out:
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trace_nfs4_exchange_id(clp, status);
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rpc_put_task(task);
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return status;
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}
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/*
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@ -7615,13 +7601,13 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
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/* try SP4_MACH_CRED if krb5i/p */
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if (authflavor == RPC_AUTH_GSS_KRB5I ||
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authflavor == RPC_AUTH_GSS_KRB5P) {
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status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
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status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
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if (!status)
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return 0;
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}
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/* try SP4_NONE */
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return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
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return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
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}
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/**
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@ -7643,6 +7629,9 @@ int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
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void *data)
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{
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struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
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struct rpc_task *task;
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int status;
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u32 sp4_how;
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dprintk("--> %s try %s\n", __func__,
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@ -7651,7 +7640,17 @@ int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
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sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
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/* Test connection for session trunking. Async exchange_id call */
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return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
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task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
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if (IS_ERR(task))
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return PTR_ERR(task);
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status = task->tk_status;
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if (status == 0)
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status = nfs4_detect_session_trunking(adata->clp,
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task->tk_msg.rpc_resp, xprt);
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rpc_put_task(task);
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return status;
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}
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EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
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