diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 47739f4f6709a84e6be9c9f3e72a0fd4f259dc73..2bd80fdcceffd932e6c71514abf7d2aff7adbb4b 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -568,6 +568,19 @@ static void _zfcp_status_read_scheduler(struct work_struct *work) stat_work)); } +static int zfcp_nameserver_enqueue(struct zfcp_adapter *adapter) +{ + struct zfcp_port *port; + + port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA, + ZFCP_DID_DIRECTORY_SERVICE); + if (!port) + return -ENXIO; + zfcp_port_put(port); + + return 0; +} + /* * Enqueues an adapter at the end of the adapter list in the driver data. * All adapter internal structures are set up. @@ -648,6 +661,7 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) /* initialize lock of associated request queue */ rwlock_init(&adapter->req_q.lock); INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler); + INIT_WORK(&adapter->scan_work, _zfcp_scan_ports_later); /* mark adapter unusable as long as sysfs registration is not complete */ atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); @@ -673,6 +687,8 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) zfcp_data.adapters++; + zfcp_nameserver_enqueue(adapter); + goto out; generic_services_failed: @@ -704,6 +720,7 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) int retval = 0; unsigned long flags; + cancel_work_sync(&adapter->scan_work); cancel_work_sync(&adapter->stat_work); zfcp_adapter_scsi_unregister(adapter); device_unregister(&adapter->generic_services); @@ -816,13 +833,15 @@ zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status, kfree(port); return NULL; } - port->d_id = d_id; port->sysfs_device.parent = &adapter->generic_services; } else { snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", wwpn); port->sysfs_device.parent = &adapter->ccw_device->dev; } + + port->d_id = d_id; + port->sysfs_device.release = zfcp_sysfs_port_release; dev_set_drvdata(&port->sysfs_device, port); @@ -873,21 +892,6 @@ zfcp_port_dequeue(struct zfcp_port *port) device_unregister(&port->sysfs_device); } -/* Enqueues a nameserver port */ -int -zfcp_nameserver_enqueue(struct zfcp_adapter *adapter) -{ - struct zfcp_port *port; - - port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA, - ZFCP_DID_DIRECTORY_SERVICE); - if (!port) - return -ENXIO; - zfcp_port_put(port); - - return 0; -} - void zfcp_sg_free_table(struct scatterlist *sg, int count) { int i; diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c index 7c72f502eb0f5593373f0e3dd1fe750583dcf59a..3e9f0abb22f9bd5d0fd4f138ca56cf8ca02a7013 100644 --- a/drivers/s390/scsi/zfcp_dbf.c +++ b/drivers/s390/scsi/zfcp_dbf.c @@ -596,6 +596,10 @@ static const char *zfcp_rec_dbf_ids[] = { [145] = "recovery action being processed", [146] = "recovery action ready for next step", [147] = "qdio error inbound", + [148] = "nameserver needed for port scan", + [149] = "port scan", + [150] = "ptp attach", + [151] = "port validation failed", }; static int zfcp_rec_dbf_view_format(debug_info_t *id, struct debug_view *view, diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 73425dbb2be801fd970561c79a2cf79216f08b8c..1e837d46ea749bf1cf9a1d4c23d41d77a45b5a09 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -282,7 +282,10 @@ struct zfcp_rc_entry { #define ZFCP_CT_DIRECTORY_SERVICE 0xFC #define ZFCP_CT_NAME_SERVER 0x02 #define ZFCP_CT_SYNCHRONOUS 0x00 +#define ZFCP_CT_SCSI_FCP 0x08 +#define ZFCP_CT_UNABLE_TO_PERFORM_CMD 0x09 #define ZFCP_CT_GID_PN 0x0121 +#define ZFCP_CT_GPN_FT 0x0172 #define ZFCP_CT_MAX_SIZE 0x1020 #define ZFCP_CT_ACCEPT 0x8002 #define ZFCP_CT_REJECT 0x8001 @@ -311,6 +314,7 @@ struct zfcp_rc_entry { #define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000 #define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000 #define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000 +#define ZFCP_STATUS_COMMON_NOESC 0x00200000 /* adapter status */ #define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002 @@ -629,6 +633,7 @@ struct zfcp_adapter { struct fc_host_statistics *fc_stats; struct fsf_qtcb_bottom_port *stats_reset_data; unsigned long stats_reset; + struct work_struct scan_work; }; /* diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index c06156b288ea395ae533a60c9bde1ba3da42a9f7..9b9c999cf39f568896c453bf65256eedf2a795a5 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -1199,6 +1199,10 @@ zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) zfcp_erp_port_unblock(port); break; case ZFCP_ERP_FAILED : + if (atomic_test_mask(ZFCP_STATUS_COMMON_NOESC, &port->status)) { + zfcp_erp_port_block(port, 0); + result = ZFCP_ERP_EXIT; + } atomic_inc(&port->erp_counter); if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) zfcp_erp_port_failed(port, 22, NULL); @@ -1607,6 +1611,7 @@ zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *erp_action, int close) goto failed_openfcp; atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &erp_action->adapter->status); + schedule_work(&erp_action->adapter->scan_work); goto out; close_only: @@ -1665,10 +1670,19 @@ zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action) return zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action); } +static void zfcp_erp_open_ptp_port(struct zfcp_adapter *adapter) +{ + struct zfcp_port *port; + port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0, + adapter->peer_d_id); + if (!port) /* error or port already attached */ + return; + zfcp_erp_port_reopen_internal(port, 0, 150, NULL); +} + static int zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) { - int retval = ZFCP_ERP_SUCCEEDED; int retries; int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP; struct zfcp_adapter *adapter = erp_action->adapter; @@ -1682,8 +1696,9 @@ zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) zfcp_erp_action_to_running(erp_action); write_unlock_irq(&adapter->erp_lock); if (zfcp_fsf_exchange_config_data(erp_action)) { - retval = ZFCP_ERP_FAILED; - break; + atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status); + return ZFCP_ERP_FAILED; } /* @@ -1719,9 +1734,12 @@ zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status)) - retval = ZFCP_ERP_FAILED; + return ZFCP_ERP_FAILED; - return retval; + if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) + zfcp_erp_open_ptp_port(adapter); + + return ZFCP_ERP_SUCCEEDED; } static int @@ -1899,14 +1917,12 @@ zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *erp_action) retval = zfcp_erp_port_strategy_open_port(erp_action); break; } - if (!(adapter->nameserver_port)) { - retval = zfcp_nameserver_enqueue(adapter); - if (retval != 0) { - dev_err(&adapter->ccw_device->dev, - "Nameserver port unavailable.\n"); - retval = ZFCP_ERP_FAILED; - break; - } + + if (!adapter->nameserver_port) { + dev_err(&adapter->ccw_device->dev, + "Nameserver port unavailable.\n"); + retval = ZFCP_ERP_FAILED; + break; } if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->nameserver_port->status)) { diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index 9aa412bd66372d40bb68607d3917140ac1956a87..c3b51338abfa4b92a5a8c8eff25d86669022d25c 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -37,6 +37,8 @@ extern struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *, wwn_t, extern void zfcp_port_dequeue(struct zfcp_port *); extern struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *, fcp_lun_t); extern void zfcp_unit_dequeue(struct zfcp_unit *); +extern int zfcp_scan_ports(struct zfcp_adapter *); +extern void _zfcp_scan_ports_later(struct work_struct *work); /******************************* S/390 IO ************************************/ extern int zfcp_ccw_register(void); @@ -97,8 +99,6 @@ extern int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *); extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *); extern void zfcp_test_link(struct zfcp_port *); -extern int zfcp_nameserver_enqueue(struct zfcp_adapter *); - /******************************* SCSI ****************************************/ extern int zfcp_adapter_scsi_register(struct zfcp_adapter *); extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *); diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c index bb07c3bf2258af13555e6c48d933cf9580e38228..aa2d9a668d170f74a1e672eaa0fd4e9dd1bd52aa 100644 --- a/drivers/s390/scsi/zfcp_fc.c +++ b/drivers/s390/scsi/zfcp_fc.c @@ -8,6 +8,37 @@ #include "zfcp_ext.h" +struct ct_iu_gpn_ft_req { + struct ct_hdr header; + u8 flags; + u8 domain_id_scope; + u8 area_id_scope; + u8 fc4_type; +} __attribute__ ((packed)); + +struct gpn_ft_resp_acc { + u8 control; + u8 port_id[3]; + u8 reserved[4]; + u64 wwpn; +} __attribute__ ((packed)); + +#define ZFCP_GPN_FT_ENTRIES ((PAGE_SIZE - sizeof(struct ct_hdr)) \ + / sizeof(struct gpn_ft_resp_acc)) +#define ZFCP_GPN_FT_BUFFERS 4 +#define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1) + +struct ct_iu_gpn_ft_resp { + struct ct_hdr header; + struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES]; +} __attribute__ ((packed)); + +struct zfcp_gpn_ft { + struct zfcp_send_ct ct; + struct scatterlist sg_req; + struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS]; +}; + static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, struct fcp_rscn_element *elem) { @@ -68,6 +99,7 @@ static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) } _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); } + schedule_work(&fsf_req->adapter->scan_work); } static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, wwn_t wwpn) @@ -303,3 +335,219 @@ void zfcp_test_link(struct zfcp_port *port) zfcp_port_put(port); zfcp_erp_port_forced_reopen(port, 0, 65, NULL); } + +static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter) +{ + int ret; + + if (!adapter->nameserver_port) + return -EINTR; + + if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &adapter->nameserver_port->status)) { + ret = zfcp_erp_port_reopen(adapter->nameserver_port, 0, 148, + NULL); + if (ret) + return ret; + zfcp_erp_wait(adapter); + zfcp_port_put(adapter->nameserver_port); + } + return !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &adapter->nameserver_port->status); +} + +static void zfcp_gpn_ft_handler(unsigned long _done) +{ + complete((struct completion *)_done); +} + +static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft) +{ + struct scatterlist *sg = &gpn_ft->sg_req; + + kfree(sg_virt(sg)); /* free request buffer */ + zfcp_sg_free_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS); + + kfree(gpn_ft); +} + +static struct zfcp_gpn_ft *zfcp_alloc_sg_env(void) +{ + struct zfcp_gpn_ft *gpn_ft; + struct ct_iu_gpn_ft_req *req; + + gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); + if (!gpn_ft) + return NULL; + + req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL); + if (!req) { + kfree(gpn_ft); + gpn_ft = NULL; + goto out; + } + sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); + + if (zfcp_sg_setup_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS)) { + zfcp_free_sg_env(gpn_ft); + gpn_ft = NULL; + } +out: + return gpn_ft; +} + + +static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft, + struct zfcp_adapter *adapter) +{ + struct zfcp_send_ct *ct = &gpn_ft->ct; + struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); + struct completion done; + int ret; + + /* prepare CT IU for GPN_FT */ + req->header.revision = ZFCP_CT_REVISION; + req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; + req->header.gs_subtype = ZFCP_CT_NAME_SERVER; + req->header.options = ZFCP_CT_SYNCHRONOUS; + req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; + req->header.max_res_size = (sizeof(struct gpn_ft_resp_acc) * + (ZFCP_GPN_FT_MAX_ENTRIES - 1)) >> 2; + req->flags = 0; + req->domain_id_scope = 0; + req->area_id_scope = 0; + req->fc4_type = ZFCP_CT_SCSI_FCP; + + /* prepare zfcp_send_ct */ + ct->port = adapter->nameserver_port; + ct->handler = zfcp_gpn_ft_handler; + ct->handler_data = (unsigned long)&done; + ct->timeout = 10; + ct->req = &gpn_ft->sg_req; + ct->resp = gpn_ft->sg_resp; + ct->req_count = 1; + ct->resp_count = ZFCP_GPN_FT_BUFFERS; + + init_completion(&done); + ret = zfcp_fsf_send_ct(ct, NULL, NULL); + if (!ret) + wait_for_completion(&done); + return ret; +} + +static void zfcp_validate_port(struct zfcp_port *port) +{ + struct zfcp_adapter *adapter = port->adapter; + + atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); + + if (port == adapter->nameserver_port) + return; + if ((port->supported_classes != 0) || (port->units != 0)) { + zfcp_port_put(port); + return; + } + zfcp_erp_port_shutdown(port, 0, 151, NULL); + zfcp_erp_wait(adapter); + zfcp_port_put(port); + zfcp_port_dequeue(port); +} + +static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft) +{ + struct zfcp_send_ct *ct = &gpn_ft->ct; + struct scatterlist *sg = gpn_ft->sg_resp; + struct ct_hdr *hdr = sg_virt(sg); + struct gpn_ft_resp_acc *acc = sg_virt(sg); + struct zfcp_adapter *adapter = ct->port->adapter; + struct zfcp_port *port, *tmp; + u32 d_id; + int ret = 0, x; + + if (ct->status) + return -EIO; + + if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { + if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) + return -EAGAIN; /* might be a temporary condition */ + return -EIO; + } + + if (hdr->max_res_size) + return -E2BIG; + + down(&zfcp_data.config_sema); + + /* first entry is the header */ + for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES; x++) { + if (x % (ZFCP_GPN_FT_ENTRIES + 1)) + acc++; + else + acc = sg_virt(++sg); + + d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | + acc->port_id[2]; + + /* skip the adapter's port and known remote ports */ + if (acc->wwpn == fc_host_port_name(adapter->scsi_host) || + zfcp_get_port_by_did(adapter, d_id)) + continue; + + port = zfcp_port_enqueue(adapter, acc->wwpn, + ZFCP_STATUS_PORT_DID_DID | + ZFCP_STATUS_COMMON_NOESC, d_id); + if (port) + zfcp_erp_port_reopen(port, 0, 149, NULL); + else + ret = -ENOMEM; + if (acc->control & 0x80) /* last entry */ + break; + } + + zfcp_erp_wait(adapter); + list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list) + zfcp_validate_port(port); + up(&zfcp_data.config_sema); + return ret; +} + +/** + * zfcp_scan_ports - scan remote ports and attach new ports + * @adapter: pointer to struct zfcp_adapter + */ +int zfcp_scan_ports(struct zfcp_adapter *adapter) +{ + int ret, i; + struct zfcp_gpn_ft *gpn_ft; + + if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT) + return 0; + + ret = zfcp_scan_get_nameserver(adapter); + if (ret) + return ret; + + gpn_ft = zfcp_alloc_sg_env(); + if (!gpn_ft) + return -ENOMEM; + + for (i = 0; i < 3; i++) { + ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter); + if (!ret) { + ret = zfcp_scan_eval_gpn_ft(gpn_ft); + if (ret == -EAGAIN) + ssleep(1); + else + break; + } + } + zfcp_free_sg_env(gpn_ft); + + return ret; +} + + +void _zfcp_scan_ports_later(struct work_struct *work) +{ + zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); +} diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index 01ed5fb46c441d9dd88abade746b7847b7f8a704..243e792f2407267985c5fab99442d8fefa9630ef 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -874,6 +874,9 @@ zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) if (status_buffer->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED) zfcp_erp_adapter_access_changed(adapter, 135, fsf_req); + if (status_buffer->status_subtype & + FSF_STATUS_READ_SUB_INCOMING_ELS) + schedule_work(&adapter->scan_work); break; case FSF_STATUS_READ_CFDC_UPDATED: diff --git a/drivers/s390/scsi/zfcp_sysfs_adapter.c b/drivers/s390/scsi/zfcp_sysfs_adapter.c index 1f2a8c21b731461895a21e619ec0a434b05fd4e5..a4cae60f69d44eba325c68e22e7d35febbb2d454 100644 --- a/drivers/s390/scsi/zfcp_sysfs_adapter.c +++ b/drivers/s390/scsi/zfcp_sysfs_adapter.c @@ -84,6 +84,30 @@ zfcp_sysfs_port_add_store(struct device *dev, struct device_attribute *attr, con static DEVICE_ATTR(port_add, S_IWUSR, NULL, zfcp_sysfs_port_add_store); +/** + * zfcp_sysfs_port_rescan - trigger manual port rescan + * @dev: pointer to belonging device + * @attr: pointer to struct device_attribute + * @buf: pointer to input buffer + * @count: number of bytes in buffer + */ +static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct zfcp_adapter *adapter; + int ret; + + adapter = dev_get_drvdata(dev); + if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) + return -EBUSY; + + ret = zfcp_scan_ports(adapter); + + return ret ? ret : (ssize_t) count; +} +static DEVICE_ATTR(port_rescan, S_IWUSR, NULL, zfcp_sysfs_port_rescan_store); + /** * zfcp_sysfs_port_remove_store - remove a port from sysfs tree * @dev: pointer to belonging device @@ -214,6 +238,7 @@ static struct attribute *zfcp_adapter_attrs[] = { &dev_attr_in_recovery.attr, &dev_attr_port_remove.attr, &dev_attr_port_add.attr, + &dev_attr_port_rescan.attr, &dev_attr_peer_wwnn.attr, &dev_attr_peer_wwpn.attr, &dev_attr_peer_d_id.attr,