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[SCSI] zfcp: Decouple gid_pn requests from erp
Don't let the erp wait for gid_pn requests to complete. Instead, queue the gid_pn work, exit erp and let the finished gid_pn work trigger a new port reopen. Reviewed-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
parent
564e1c86c8
commit
799b76d09a
6 changed files with 47 additions and 56 deletions
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@ -362,6 +362,11 @@ static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
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if (!adapter->pool.erp_req)
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return -ENOMEM;
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adapter->pool.gid_pn_req =
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mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
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if (!adapter->pool.gid_pn_req)
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return -ENOMEM;
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adapter->pool.scsi_req =
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mempool_create_kmalloc_pool(1, sizeof(struct zfcp_fsf_req));
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if (!adapter->pool.scsi_req)
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@ -379,7 +384,7 @@ static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
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return -ENOMEM;
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adapter->pool.qtcb_pool =
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mempool_create_slab_pool(3, zfcp_data.qtcb_cache);
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mempool_create_slab_pool(4, zfcp_data.qtcb_cache);
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if (!adapter->pool.qtcb_pool)
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return -ENOMEM;
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@ -652,7 +657,7 @@ struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn,
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init_waitqueue_head(&port->remove_wq);
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INIT_LIST_HEAD(&port->unit_list_head);
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INIT_WORK(&port->gid_pn_work, zfcp_erp_port_strategy_open_lookup);
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INIT_WORK(&port->gid_pn_work, zfcp_fc_port_did_lookup);
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INIT_WORK(&port->test_link_work, zfcp_fc_link_test_work);
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INIT_WORK(&port->rport_work, zfcp_scsi_rport_work);
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@ -265,6 +265,7 @@ struct zfcp_fsf_req;
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/* holds various memory pools of an adapter */
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struct zfcp_adapter_mempool {
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mempool_t *erp_req;
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mempool_t *gid_pn_req;
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mempool_t *scsi_req;
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mempool_t *scsi_abort;
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mempool_t *status_read_req;
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@ -26,7 +26,6 @@ enum zfcp_erp_steps {
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ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001,
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ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010,
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ZFCP_ERP_STEP_PORT_CLOSING = 0x0100,
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ZFCP_ERP_STEP_NAMESERVER_LOOKUP = 0x0400,
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ZFCP_ERP_STEP_PORT_OPENING = 0x0800,
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ZFCP_ERP_STEP_UNIT_CLOSING = 0x1000,
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ZFCP_ERP_STEP_UNIT_OPENING = 0x2000,
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@ -842,27 +841,6 @@ static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act)
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return zfcp_erp_port_strategy_open_port(act);
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}
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void zfcp_erp_port_strategy_open_lookup(struct work_struct *work)
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{
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int retval;
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struct zfcp_port *port = container_of(work, struct zfcp_port,
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gid_pn_work);
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retval = zfcp_fc_ns_gid_pn(&port->erp_action);
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if (!retval) {
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port->erp_action.step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
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goto out;
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}
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if (retval == -ENOMEM) {
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zfcp_erp_notify(&port->erp_action, ZFCP_STATUS_ERP_LOWMEM);
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goto out;
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}
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/* all other error condtions */
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zfcp_erp_notify(&port->erp_action, 0);
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out:
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zfcp_port_put(port);
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}
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static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
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{
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struct zfcp_adapter *adapter = act->adapter;
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@ -880,12 +858,8 @@ static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
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if (!queue_work(adapter->work_queue,
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&port->gid_pn_work))
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zfcp_port_put(port);
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return ZFCP_ERP_CONTINUES;
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return ZFCP_ERP_EXIT;
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}
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/* fall through */
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case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
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if (!port->d_id)
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return ZFCP_ERP_FAILED;
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return zfcp_erp_port_strategy_open_port(act);
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case ZFCP_ERP_STEP_PORT_OPENING:
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@ -94,13 +94,12 @@ extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, char *, void *);
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extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, char *,
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void *);
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extern void zfcp_erp_timeout_handler(unsigned long);
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extern void zfcp_erp_port_strategy_open_lookup(struct work_struct *);
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/* zfcp_fc.c */
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extern int zfcp_scan_ports(struct zfcp_adapter *);
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extern void _zfcp_scan_ports_later(struct work_struct *);
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extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *);
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extern int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *);
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extern void zfcp_fc_port_did_lookup(struct work_struct *);
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extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *);
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extern void zfcp_test_link(struct zfcp_port *);
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extern void zfcp_fc_link_test_work(struct work_struct *);
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@ -128,8 +127,7 @@ extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *,
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extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
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extern int zfcp_fsf_status_read(struct zfcp_qdio *);
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extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
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extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *,
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struct zfcp_erp_action *);
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extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *);
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extern int zfcp_fsf_send_els(struct zfcp_send_els *);
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extern int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *,
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struct scsi_cmnd *);
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@ -282,15 +282,15 @@ static void zfcp_fc_ns_gid_pn_eval(unsigned long data)
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port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
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}
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int static zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action,
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static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
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struct zfcp_gid_pn_data *gid_pn)
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{
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struct zfcp_adapter *adapter = erp_action->adapter;
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struct zfcp_adapter *adapter = port->adapter;
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struct zfcp_fc_ns_handler_data compl_rec;
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int ret;
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/* setup parameters for send generic command */
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gid_pn->port = erp_action->port;
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gid_pn->port = port;
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gid_pn->ct.wka_port = &adapter->gs->ds;
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gid_pn->ct.handler = zfcp_fc_ns_handler;
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gid_pn->ct.handler_data = (unsigned long) &compl_rec;
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@ -309,12 +309,12 @@ int static zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action,
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gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS;
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gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN;
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gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_SIZE_ONE_PAGE / 4;
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gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn;
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gid_pn->ct_iu_req.wwpn = port->wwpn;
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init_completion(&compl_rec.done);
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compl_rec.handler = zfcp_fc_ns_gid_pn_eval;
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compl_rec.handler_data = (unsigned long) gid_pn;
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ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.erp_req, erp_action);
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ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.gid_pn_req);
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if (!ret)
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wait_for_completion(&compl_rec.done);
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return ret;
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@ -322,14 +322,14 @@ int static zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action,
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/**
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* zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request
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* @erp_action: pointer to zfcp_erp_action where GID_PN request is needed
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* @port: port where GID_PN request is needed
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* return: -ENOMEM on error, 0 otherwise
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*/
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int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *erp_action)
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static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
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{
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int ret;
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struct zfcp_gid_pn_data *gid_pn;
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struct zfcp_adapter *adapter = erp_action->adapter;
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struct zfcp_adapter *adapter = port->adapter;
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gid_pn = mempool_alloc(adapter->pool.gid_pn_data, GFP_ATOMIC);
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if (!gid_pn)
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@ -341,7 +341,7 @@ int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *erp_action)
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if (ret)
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goto out;
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ret = zfcp_fc_ns_gid_pn_request(erp_action, gid_pn);
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ret = zfcp_fc_ns_gid_pn_request(port, gid_pn);
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zfcp_wka_port_put(&adapter->gs->ds);
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out:
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@ -349,6 +349,29 @@ int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *erp_action)
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return ret;
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}
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void zfcp_fc_port_did_lookup(struct work_struct *work)
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{
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int ret;
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struct zfcp_port *port = container_of(work, struct zfcp_port,
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gid_pn_work);
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ret = zfcp_fc_ns_gid_pn(port);
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if (ret) {
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/* could not issue gid_pn for some reason */
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zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL);
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goto out;
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}
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if (!port->d_id) {
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zfcp_erp_port_failed(port, "fcgpn_2", NULL);
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goto out;
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}
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zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL);
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out:
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zfcp_port_put(port);
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}
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/**
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* zfcp_fc_plogi_evaluate - evaluate PLOGI playload
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* @port: zfcp_port structure
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@ -551,7 +574,7 @@ static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft,
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init_completion(&compl_rec.done);
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compl_rec.handler = NULL;
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ret = zfcp_fsf_send_ct(ct, NULL, NULL);
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ret = zfcp_fsf_send_ct(ct, NULL);
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if (!ret)
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wait_for_completion(&compl_rec.done);
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return ret;
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ct_fc_job->ct.completion = NULL;
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ct_fc_job->job = job;
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ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL, NULL);
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ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL);
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if (ret) {
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kfree(ct_fc_job);
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zfcp_wka_port_put(ct_fc_job->ct.wka_port);
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@ -1069,10 +1069,8 @@ static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req,
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* zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
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* @ct: pointer to struct zfcp_send_ct with data for request
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* @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
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* @erp_action: if non-null the Generic Service request sent within ERP
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*/
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int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
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struct zfcp_erp_action *erp_action)
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int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool)
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{
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struct zfcp_wka_port *wka_port = ct->wka_port;
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struct zfcp_qdio *qdio = wka_port->adapter->qdio;
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@ -1103,12 +1101,6 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
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req->data = ct;
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zfcp_san_dbf_event_ct_request(req);
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if (erp_action) {
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erp_action->fsf_req = req;
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req->erp_action = erp_action;
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zfcp_fsf_start_erp_timer(req);
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} else
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zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
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ret = zfcp_fsf_req_send(req);
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@ -1119,8 +1111,6 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
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failed_send:
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zfcp_fsf_req_free(req);
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if (erp_action)
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erp_action->fsf_req = NULL;
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out:
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spin_unlock_bh(&qdio->req_q_lock);
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return ret;
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