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nfs: run state manager in privileged mode
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
parent
b257957e50
commit
5601a00d67
2 changed files with 16 additions and 21 deletions
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@ -477,7 +477,8 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
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tbl = &session->fc_slot_table;
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spin_lock(&tbl->slot_tbl_lock);
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if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
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if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
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!rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
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/*
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* The state manager will wait until the slot table is empty.
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* Schedule the reset thread
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@ -135,9 +135,9 @@ static int nfs41_setup_state_renewal(struct nfs_client *clp)
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return status;
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}
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static void nfs41_end_drain_session(struct nfs_client *clp,
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struct nfs4_session *ses)
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static void nfs4_end_drain_session(struct nfs_client *clp)
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{
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struct nfs4_session *ses = clp->cl_session;
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int max_slots;
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if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
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@ -156,9 +156,9 @@ static void nfs41_end_drain_session(struct nfs_client *clp,
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}
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}
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static int nfs41_begin_drain_session(struct nfs_client *clp,
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struct nfs4_session *ses)
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static int nfs4_begin_drain_session(struct nfs_client *clp)
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{
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struct nfs4_session *ses = clp->cl_session;
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struct nfs4_slot_table *tbl = &ses->fc_slot_table;
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spin_lock(&tbl->slot_tbl_lock);
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@ -176,16 +176,12 @@ int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
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{
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int status;
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status = nfs41_begin_drain_session(clp, clp->cl_session);
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if (status != 0)
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goto out;
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status = nfs4_proc_exchange_id(clp, cred);
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if (status != 0)
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goto out;
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status = nfs4_proc_create_session(clp);
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if (status != 0)
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goto out;
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nfs41_end_drain_session(clp, clp->cl_session);
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nfs41_setup_state_renewal(clp);
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nfs_mark_client_ready(clp, NFS_CS_READY);
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out:
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@ -1271,13 +1267,8 @@ void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags)
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static int nfs4_reset_session(struct nfs_client *clp)
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{
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struct nfs4_session *ses = clp->cl_session;
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int status;
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status = nfs41_begin_drain_session(clp, ses);
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if (status != 0)
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return status;
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status = nfs4_proc_destroy_session(clp->cl_session);
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if (status && status != -NFS4ERR_BADSESSION &&
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status != -NFS4ERR_DEADSESSION) {
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@ -1293,19 +1284,18 @@ static int nfs4_reset_session(struct nfs_client *clp)
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out:
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/*
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* Let the state manager reestablish state
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* without waking other tasks yet.
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*/
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if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
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/* Wake up the next rpc task */
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nfs41_end_drain_session(clp, ses);
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if (status == 0)
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nfs41_setup_state_renewal(clp);
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}
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if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
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status == 0)
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nfs41_setup_state_renewal(clp);
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return status;
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}
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#else /* CONFIG_NFS_V4_1 */
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static int nfs4_reset_session(struct nfs_client *clp) { return 0; }
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static int nfs4_begin_drain_session(struct nfs_client *clp) { return 0; }
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static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; }
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#endif /* CONFIG_NFS_V4_1 */
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/* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors
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@ -1337,6 +1327,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
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for(;;) {
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if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
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/* We're going to have to re-establish a clientid */
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nfs4_begin_drain_session(clp);
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status = nfs4_reclaim_lease(clp);
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if (status) {
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nfs4_set_lease_expired(clp, status);
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@ -1363,6 +1354,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
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/* Initialize or reset the session */
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if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)
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&& nfs4_has_session(clp)) {
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nfs4_begin_drain_session(clp);
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status = nfs4_reset_session(clp);
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if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
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continue;
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@ -1396,6 +1388,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
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goto out_error;
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}
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nfs4_end_drain_session(clp);
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if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) {
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nfs_client_return_marked_delegations(clp);
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continue;
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@ -1412,6 +1405,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
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out_error:
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printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s"
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" with error %d\n", clp->cl_hostname, -status);
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nfs4_end_drain_session(clp);
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nfs4_clear_state_manager_bit(clp);
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}
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