diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_fc.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_fc.c | 1126 |
1 files changed, 775 insertions, 351 deletions
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c index e984469bb98..ca28e1c6611 100644 --- a/drivers/s390/scsi/zfcp_fc.c +++ b/drivers/s390/scsi/zfcp_fc.c @@ -3,151 +3,266 @@ * * Fibre Channel related functions for the zfcp device driver. * - * Copyright IBM Corporation 2008 + * Copyright IBM Corp. 2008, 2010 */ +#define KMSG_COMPONENT "zfcp" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/utsname.h> +#include <scsi/fc/fc_els.h> +#include <scsi/libfc.h> #include "zfcp_ext.h" +#include "zfcp_fc.h" + +struct kmem_cache *zfcp_fc_req_cache; -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 u32 zfcp_fc_rscn_range_mask[] = { + [ELS_ADDR_FMT_PORT] = 0xFFFFFF, + [ELS_ADDR_FMT_AREA] = 0xFFFF00, + [ELS_ADDR_FMT_DOM] = 0xFF0000, + [ELS_ADDR_FMT_FAB] = 0x000000, }; -static struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *adapter, - u32 d_id) +static bool no_auto_port_rescan; +module_param_named(no_auto_port_rescan, no_auto_port_rescan, bool, 0600); +MODULE_PARM_DESC(no_auto_port_rescan, + "no automatic port_rescan (default off)"); + +void zfcp_fc_conditional_port_scan(struct zfcp_adapter *adapter) { - struct zfcp_port *port; + if (no_auto_port_rescan) + return; + + queue_work(adapter->work_queue, &adapter->scan_work); +} + +void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter *adapter) +{ + if (!no_auto_port_rescan) + return; + + queue_work(adapter->work_queue, &adapter->scan_work); +} + +/** + * zfcp_fc_post_event - post event to userspace via fc_transport + * @work: work struct with enqueued events + */ +void zfcp_fc_post_event(struct work_struct *work) +{ + struct zfcp_fc_event *event = NULL, *tmp = NULL; + LIST_HEAD(tmp_lh); + struct zfcp_fc_events *events = container_of(work, + struct zfcp_fc_events, work); + struct zfcp_adapter *adapter = container_of(events, struct zfcp_adapter, + events); + + spin_lock_bh(&events->list_lock); + list_splice_init(&events->list, &tmp_lh); + spin_unlock_bh(&events->list_lock); + + list_for_each_entry_safe(event, tmp, &tmp_lh, list) { + fc_host_post_event(adapter->scsi_host, fc_get_event_number(), + event->code, event->data); + list_del(&event->list); + kfree(event); + } + +} + +/** + * zfcp_fc_enqueue_event - safely enqueue FC HBA API event from irq context + * @adapter: The adapter where to enqueue the event + * @event_code: The event code (as defined in fc_host_event_code in + * scsi_transport_fc.h) + * @event_data: The event data (e.g. n_port page in case of els) + */ +void zfcp_fc_enqueue_event(struct zfcp_adapter *adapter, + enum fc_host_event_code event_code, u32 event_data) +{ + struct zfcp_fc_event *event; + + event = kmalloc(sizeof(struct zfcp_fc_event), GFP_ATOMIC); + if (!event) + return; + + event->code = event_code; + event->data = event_data; + + spin_lock(&adapter->events.list_lock); + list_add_tail(&event->list, &adapter->events.list); + spin_unlock(&adapter->events.list_lock); + + queue_work(adapter->work_queue, &adapter->events.work); +} + +static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port) +{ + if (mutex_lock_interruptible(&wka_port->mutex)) + return -ERESTARTSYS; + + if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE || + wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) { + wka_port->status = ZFCP_FC_WKA_PORT_OPENING; + if (zfcp_fsf_open_wka_port(wka_port)) + wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; + } + + mutex_unlock(&wka_port->mutex); + + wait_event(wka_port->completion_wq, + wka_port->status == ZFCP_FC_WKA_PORT_ONLINE || + wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE); - list_for_each_entry(port, &adapter->port_list_head, list) - if ((port->d_id == d_id) && - !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) - return port; - return NULL; + if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) { + atomic_inc(&wka_port->refcount); + return 0; + } + return -EIO; +} + +static void zfcp_fc_wka_port_offline(struct work_struct *work) +{ + struct delayed_work *dw = to_delayed_work(work); + struct zfcp_fc_wka_port *wka_port = + container_of(dw, struct zfcp_fc_wka_port, work); + + mutex_lock(&wka_port->mutex); + if ((atomic_read(&wka_port->refcount) != 0) || + (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE)) + goto out; + + wka_port->status = ZFCP_FC_WKA_PORT_CLOSING; + if (zfcp_fsf_close_wka_port(wka_port)) { + wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; + wake_up(&wka_port->completion_wq); + } +out: + mutex_unlock(&wka_port->mutex); +} + +static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port) +{ + if (atomic_dec_return(&wka_port->refcount) != 0) + return; + /* wait 10 milliseconds, other reqs might pop in */ + schedule_delayed_work(&wka_port->work, HZ / 100); +} + +static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id, + struct zfcp_adapter *adapter) +{ + init_waitqueue_head(&wka_port->completion_wq); + + wka_port->adapter = adapter; + wka_port->d_id = d_id; + + wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; + atomic_set(&wka_port->refcount, 0); + mutex_init(&wka_port->mutex); + INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); +} + +static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka) +{ + cancel_delayed_work_sync(&wka->work); + mutex_lock(&wka->mutex); + wka->status = ZFCP_FC_WKA_PORT_OFFLINE; + mutex_unlock(&wka->mutex); +} + +void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs) +{ + if (!gs) + return; + zfcp_fc_wka_port_force_offline(&gs->ms); + zfcp_fc_wka_port_force_offline(&gs->ts); + zfcp_fc_wka_port_force_offline(&gs->ds); + zfcp_fc_wka_port_force_offline(&gs->as); } static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, - struct fcp_rscn_element *elem) + struct fc_els_rscn_page *page) { unsigned long flags; + struct zfcp_adapter *adapter = fsf_req->adapter; struct zfcp_port *port; - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) { - if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) - continue; - /* FIXME: ZFCP_STATUS_PORT_DID_DID check is racy */ - if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) - /* Try to connect to unused ports anyway. */ + read_lock_irqsave(&adapter->port_list_lock, flags); + list_for_each_entry(port, &adapter->port_list, list) { + if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range)) + zfcp_fc_test_link(port); + if (!port->d_id) zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, - 82, fsf_req); - else if ((port->d_id & range) == (elem->nport_did & range)) - /* Check connection status for connected ports */ - zfcp_test_link(port); + "fcrscn1"); } - read_unlock_irqrestore(&zfcp_data.config_lock, flags); + read_unlock_irqrestore(&adapter->port_list_lock, flags); } static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) { struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; - struct fcp_rscn_head *fcp_rscn_head; - struct fcp_rscn_element *fcp_rscn_element; + struct fc_els_rscn *head; + struct fc_els_rscn_page *page; u16 i; u16 no_entries; - u32 range_mask; + unsigned int afmt; - fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data; - fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head; + head = (struct fc_els_rscn *) status_buffer->payload.data; + page = (struct fc_els_rscn_page *) head; /* see FC-FS */ - no_entries = fcp_rscn_head->payload_len / - sizeof(struct fcp_rscn_element); + no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page); for (i = 1; i < no_entries; i++) { /* skip head and start with 1st element */ - fcp_rscn_element++; - switch (fcp_rscn_element->addr_format) { - case ZFCP_PORT_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_PORT; - break; - case ZFCP_AREA_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_AREA; - break; - case ZFCP_DOMAIN_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_DOMAIN; - break; - case ZFCP_FABRIC_ADDRESS: - range_mask = ZFCP_PORTS_RANGE_FABRIC; - break; - default: - continue; - } - _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); + page++; + afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK; + _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt], + page); + zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN, + *(u32 *)page); } - schedule_work(&fsf_req->adapter->scan_work); + zfcp_fc_conditional_port_scan(fsf_req->adapter); } -static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, wwn_t wwpn) +static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) { + unsigned long flags; struct zfcp_adapter *adapter = req->adapter; struct zfcp_port *port; - unsigned long flags; - read_lock_irqsave(&zfcp_data.config_lock, flags); - list_for_each_entry(port, &adapter->port_list_head, list) - if (port->wwpn == wwpn) + read_lock_irqsave(&adapter->port_list_lock, flags); + list_for_each_entry(port, &adapter->port_list, list) + if (port->wwpn == wwpn) { + zfcp_erp_port_forced_reopen(port, 0, "fciwwp1"); break; - read_unlock_irqrestore(&zfcp_data.config_lock, flags); - - if (port && (port->wwpn == wwpn)) - zfcp_erp_port_forced_reopen(port, 0, 83, req); + } + read_unlock_irqrestore(&adapter->port_list_lock, flags); } static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) { - struct fsf_status_read_buffer *status_buffer = - (struct fsf_status_read_buffer *)req->data; - struct fsf_plogi *els_plogi = - (struct fsf_plogi *) status_buffer->payload.data; + struct fsf_status_read_buffer *status_buffer; + struct fc_els_flogi *plogi; - zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn); + status_buffer = (struct fsf_status_read_buffer *) req->data; + plogi = (struct fc_els_flogi *) status_buffer->payload.data; + zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn); } static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) { struct fsf_status_read_buffer *status_buffer = (struct fsf_status_read_buffer *)req->data; - struct fcp_logo *els_logo = - (struct fcp_logo *) status_buffer->payload.data; + struct fc_els_logo *logo = + (struct fc_els_logo *) status_buffer->payload.data; - zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn); + zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn); } /** @@ -160,87 +275,138 @@ void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) (struct fsf_status_read_buffer *) fsf_req->data; unsigned int els_type = status_buffer->payload.data[0]; - zfcp_san_dbf_event_incoming_els(fsf_req); - if (els_type == LS_PLOGI) + zfcp_dbf_san_in_els("fciels1", fsf_req); + if (els_type == ELS_PLOGI) zfcp_fc_incoming_plogi(fsf_req); - else if (els_type == LS_LOGO) + else if (els_type == ELS_LOGO) zfcp_fc_incoming_logo(fsf_req); - else if (els_type == LS_RSCN) + else if (els_type == ELS_RSCN) zfcp_fc_incoming_rscn(fsf_req); } -static void zfcp_ns_gid_pn_handler(unsigned long data) +static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req) { - struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; - struct zfcp_send_ct *ct = &gid_pn->ct; - struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); - struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); - struct zfcp_port *port = gid_pn->port; + struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; + struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp; + + if (ct_els->status) + return; + if (gid_pn_rsp->ct_hdr.ct_cmd != FC_FS_ACC) + return; - if (ct->status) - goto out; - if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) { - atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status); - goto out; - } - /* paranoia */ - if (ct_iu_req->wwpn != port->wwpn) - goto out; /* looks like a valid d_id */ - port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; - atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); -out: - mempool_free(gid_pn, port->adapter->pool.data_gid_pn); + ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid); +} + +static void zfcp_fc_complete(void *data) +{ + complete(data); +} + +static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size) +{ + ct_hdr->ct_rev = FC_CT_REV; + ct_hdr->ct_fs_type = FC_FST_DIR; + ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE; + ct_hdr->ct_cmd = cmd; + ct_hdr->ct_mr_size = mr_size / 4; +} + +static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, + struct zfcp_fc_req *fc_req) +{ + struct zfcp_adapter *adapter = port->adapter; + DECLARE_COMPLETION_ONSTACK(completion); + struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req; + struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp; + int ret; + + /* setup parameters for send generic command */ + fc_req->ct_els.port = port; + fc_req->ct_els.handler = zfcp_fc_complete; + fc_req->ct_els.handler_data = &completion; + fc_req->ct_els.req = &fc_req->sg_req; + fc_req->ct_els.resp = &fc_req->sg_rsp; + sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req)); + sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp)); + + zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr, + FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE); + gid_pn_req->gid_pn.fn_wwpn = port->wwpn; + + ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els, + adapter->pool.gid_pn_req, + ZFCP_FC_CTELS_TMO); + if (!ret) { + wait_for_completion(&completion); + zfcp_fc_ns_gid_pn_eval(fc_req); + } + return ret; } /** - * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request - * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed + * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request + * @port: port where GID_PN request is needed * return: -ENOMEM on error, 0 otherwise */ -int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action) +static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) { int ret; - struct zfcp_gid_pn_data *gid_pn; - struct zfcp_adapter *adapter = erp_action->adapter; + struct zfcp_fc_req *fc_req; + struct zfcp_adapter *adapter = port->adapter; - gid_pn = mempool_alloc(adapter->pool.data_gid_pn, GFP_ATOMIC); - if (!gid_pn) + fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC); + if (!fc_req) return -ENOMEM; - memset(gid_pn, 0, sizeof(*gid_pn)); + memset(fc_req, 0, sizeof(*fc_req)); - /* setup parameters for send generic command */ - gid_pn->port = erp_action->port; - gid_pn->ct.port = adapter->nameserver_port; - gid_pn->ct.handler = zfcp_ns_gid_pn_handler; - gid_pn->ct.handler_data = (unsigned long) gid_pn; - gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; - gid_pn->ct.req = &gid_pn->req; - gid_pn->ct.resp = &gid_pn->resp; - gid_pn->ct.req_count = 1; - gid_pn->ct.resp_count = 1; - sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, - sizeof(struct ct_iu_gid_pn_req)); - sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, - sizeof(struct ct_iu_gid_pn_resp)); - - /* setup nameserver request */ - gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; - gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; - gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; - gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; - gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; - gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_MAX_SIZE; - gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn; - - ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, - erp_action); + ret = zfcp_fc_wka_port_get(&adapter->gs->ds); if (ret) - mempool_free(gid_pn, adapter->pool.data_gid_pn); + goto out; + + ret = zfcp_fc_ns_gid_pn_request(port, fc_req); + + zfcp_fc_wka_port_put(&adapter->gs->ds); +out: + mempool_free(fc_req, adapter->pool.gid_pn); return ret; } +void zfcp_fc_port_did_lookup(struct work_struct *work) +{ + int ret; + struct zfcp_port *port = container_of(work, struct zfcp_port, + gid_pn_work); + + ret = zfcp_fc_ns_gid_pn(port); + if (ret) { + /* could not issue gid_pn for some reason */ + zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1"); + goto out; + } + + if (!port->d_id) { + zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); + goto out; + } + + zfcp_erp_port_reopen(port, 0, "fcgpn_3"); +out: + put_device(&port->dev); +} + +/** + * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request + * @port: The zfcp_port to lookup the d_id for. + */ +void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) +{ + get_device(&port->dev); + if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) + put_device(&port->dev); +} + /** * zfcp_fc_plogi_evaluate - evaluate PLOGI playload * @port: zfcp_port structure @@ -248,320 +414,578 @@ int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action) * * Evaluate PLOGI playload and copy important fields into zfcp_port structure */ -void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) +void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) { - port->maxframe_size = plogi->serv_param.common_serv_param[7] | - ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); - if (plogi->serv_param.class1_serv_param[0] & 0x80) + if (plogi->fl_wwpn != port->wwpn) { + port->d_id = 0; + dev_warn(&port->adapter->ccw_device->dev, + "A port opened with WWPN 0x%016Lx returned data that " + "identifies it as WWPN 0x%016Lx\n", + (unsigned long long) port->wwpn, + (unsigned long long) plogi->fl_wwpn); + return; + } + + port->wwnn = plogi->fl_wwnn; + port->maxframe_size = plogi->fl_csp.sp_bb_data; + + if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID) port->supported_classes |= FC_COS_CLASS1; - if (plogi->serv_param.class2_serv_param[0] & 0x80) + if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID) port->supported_classes |= FC_COS_CLASS2; - if (plogi->serv_param.class3_serv_param[0] & 0x80) + if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID) port->supported_classes |= FC_COS_CLASS3; - if (plogi->serv_param.class4_serv_param[0] & 0x80) + if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID) port->supported_classes |= FC_COS_CLASS4; } -struct zfcp_els_adisc { - struct zfcp_send_els els; - struct scatterlist req; - struct scatterlist resp; - struct zfcp_ls_adisc ls_adisc; - struct zfcp_ls_adisc_acc ls_adisc_acc; -}; - -static void zfcp_fc_adisc_handler(unsigned long data) +static void zfcp_fc_adisc_handler(void *data) { - struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data; - struct zfcp_port *port = adisc->els.port; - struct zfcp_ls_adisc_acc *ls_adisc = &adisc->ls_adisc_acc; + struct zfcp_fc_req *fc_req = data; + struct zfcp_port *port = fc_req->ct_els.port; + struct fc_els_adisc *adisc_resp = &fc_req->u.adisc.rsp; - if (adisc->els.status) { + if (fc_req->ct_els.status) { /* request rejected or timed out */ - zfcp_erp_port_forced_reopen(port, 0, 63, NULL); + zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, + "fcadh_1"); goto out; } if (!port->wwnn) - port->wwnn = ls_adisc->wwnn; + port->wwnn = adisc_resp->adisc_wwnn; - if (port->wwpn != ls_adisc->wwpn) - zfcp_erp_port_reopen(port, 0, 64, NULL); + if ((port->wwpn != adisc_resp->adisc_wwpn) || + !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { + zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, + "fcadh_2"); + goto out; + } + /* port is good, unblock rport without going through erp */ + zfcp_scsi_schedule_rport_register(port); out: - zfcp_port_put(port); - kfree(adisc); + atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); + put_device(&port->dev); + kmem_cache_free(zfcp_fc_req_cache, fc_req); } static int zfcp_fc_adisc(struct zfcp_port *port) { - struct zfcp_els_adisc *adisc; + struct zfcp_fc_req *fc_req; struct zfcp_adapter *adapter = port->adapter; + struct Scsi_Host *shost = adapter->scsi_host; + int ret; - adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC); - if (!adisc) + fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_ATOMIC); + if (!fc_req) return -ENOMEM; - adisc->els.req = &adisc->req; - adisc->els.resp = &adisc->resp; - sg_init_one(adisc->els.req, &adisc->ls_adisc, - sizeof(struct zfcp_ls_adisc)); - sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc, - sizeof(struct zfcp_ls_adisc_acc)); - - adisc->els.req_count = 1; - adisc->els.resp_count = 1; - adisc->els.adapter = adapter; - adisc->els.port = port; - adisc->els.d_id = port->d_id; - adisc->els.handler = zfcp_fc_adisc_handler; - adisc->els.handler_data = (unsigned long) adisc; - adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC; + fc_req->ct_els.port = port; + fc_req->ct_els.req = &fc_req->sg_req; + fc_req->ct_els.resp = &fc_req->sg_rsp; + sg_init_one(&fc_req->sg_req, &fc_req->u.adisc.req, + sizeof(struct fc_els_adisc)); + sg_init_one(&fc_req->sg_rsp, &fc_req->u.adisc.rsp, + sizeof(struct fc_els_adisc)); + + fc_req->ct_els.handler = zfcp_fc_adisc_handler; + fc_req->ct_els.handler_data = fc_req; /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports without FC-AL-2 capability, so we don't set it */ - adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host); - adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host); - adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host); + fc_req->u.adisc.req.adisc_wwpn = fc_host_port_name(shost); + fc_req->u.adisc.req.adisc_wwnn = fc_host_node_name(shost); + fc_req->u.adisc.req.adisc_cmd = ELS_ADISC; + hton24(fc_req->u.adisc.req.adisc_port_id, fc_host_port_id(shost)); + + ret = zfcp_fsf_send_els(adapter, port->d_id, &fc_req->ct_els, + ZFCP_FC_CTELS_TMO); + if (ret) + kmem_cache_free(zfcp_fc_req_cache, fc_req); - return zfcp_fsf_send_els(&adisc->els); + return ret; } -/** - * zfcp_test_link - lightweight link test procedure - * @port: port to be tested - * - * Test status of a link to a remote port using the ELS command ADISC. - * If there is a problem with the remote port, error recovery steps - * will be triggered. - */ -void zfcp_test_link(struct zfcp_port *port) +void zfcp_fc_link_test_work(struct work_struct *work) { + struct zfcp_port *port = + container_of(work, struct zfcp_port, test_link_work); int retval; - zfcp_port_get(port); + get_device(&port->dev); + port->rport_task = RPORT_DEL; + zfcp_scsi_rport_work(&port->rport_work); + + /* only issue one test command at one time per port */ + if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) + goto out; + + atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); + retval = zfcp_fc_adisc(port); - if (retval == 0 || retval == -EBUSY) + if (retval == 0) return; /* send of ADISC was not possible */ - 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; + atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); + zfcp_erp_port_forced_reopen(port, 0, "fcltwk1"); - 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); +out: + put_device(&port->dev); } -static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft) +/** + * zfcp_fc_test_link - lightweight link test procedure + * @port: port to be tested + * + * Test status of a link to a remote port using the ELS command ADISC. + * If there is a problem with the remote port, error recovery steps + * will be triggered. + */ +void zfcp_fc_test_link(struct zfcp_port *port) { - 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); + get_device(&port->dev); + if (!queue_work(port->adapter->work_queue, &port->test_link_work)) + put_device(&port->dev); } -static struct zfcp_gpn_ft *zfcp_alloc_sg_env(void) +static struct zfcp_fc_req *zfcp_alloc_sg_env(int buf_num) { - struct zfcp_gpn_ft *gpn_ft; - struct ct_iu_gpn_ft_req *req; + struct zfcp_fc_req *fc_req; - gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); - if (!gpn_ft) + fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL); + if (!fc_req) return NULL; - req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL); - if (!req) { - kfree(gpn_ft); - gpn_ft = NULL; - goto out; + if (zfcp_sg_setup_table(&fc_req->sg_rsp, buf_num)) { + kmem_cache_free(zfcp_fc_req_cache, fc_req); + return NULL; } - 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; -} + sg_init_one(&fc_req->sg_req, &fc_req->u.gpn_ft.req, + sizeof(struct zfcp_fc_gpn_ft_req)); + return fc_req; +} -static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft, - struct zfcp_adapter *adapter) +static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req *fc_req, + struct zfcp_adapter *adapter, int max_bytes) { - struct zfcp_send_ct *ct = &gpn_ft->ct; - struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); - struct completion done; + struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; + struct zfcp_fc_gpn_ft_req *req = &fc_req->u.gpn_ft.req; + DECLARE_COMPLETION_ONSTACK(completion); 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); + zfcp_fc_ct_ns_init(&req->ct_hdr, FC_NS_GPN_FT, max_bytes); + req->gpn_ft.fn_fc4_type = FC_TYPE_FCP; + + ct_els->handler = zfcp_fc_complete; + ct_els->handler_data = &completion; + ct_els->req = &fc_req->sg_req; + ct_els->resp = &fc_req->sg_rsp; + + ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, + ZFCP_FC_CTELS_TMO); if (!ret) - wait_for_completion(&done); + wait_for_completion(&completion); return ret; } -static void zfcp_validate_port(struct zfcp_port *port) +static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) { - struct zfcp_adapter *adapter = port->adapter; + if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) + return; 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); + if ((port->supported_classes != 0) || + !list_empty(&port->unit_list)) return; - } - zfcp_erp_port_shutdown(port, 0, 151, NULL); - zfcp_erp_wait(adapter); - zfcp_port_put(port); - zfcp_port_dequeue(port); + + list_move_tail(&port->list, lh); } -static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft) +static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_req *fc_req, + struct zfcp_adapter *adapter, int max_entries) { - 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_fsf_ct_els *ct_els = &fc_req->ct_els; + struct scatterlist *sg = &fc_req->sg_rsp; + struct fc_ct_hdr *hdr = sg_virt(sg); + struct fc_gpn_ft_resp *acc = sg_virt(sg); struct zfcp_port *port, *tmp; + unsigned long flags; + LIST_HEAD(remove_lh); u32 d_id; - int ret = 0, x; + int ret = 0, x, last = 0; - if (ct->status) + if (ct_els->status) return -EIO; - if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { - if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) + if (hdr->ct_cmd != FC_FS_ACC) { + if (hdr->ct_reason == FC_BA_RJT_UNABLE) return -EAGAIN; /* might be a temporary condition */ return -EIO; } - if (hdr->max_res_size) + if (hdr->ct_mr_size) { + dev_warn(&adapter->ccw_device->dev, + "The name server reported %d words residual data\n", + hdr->ct_mr_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)) + for (x = 1; x < max_entries && !last; x++) { + if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) acc++; else acc = sg_virt(++sg); - d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | - acc->port_id[2]; + last = acc->fp_flags & FC_NS_FID_LAST; + d_id = ntoh24(acc->fp_fid); + /* don't attach ports with a well known address */ + if (d_id >= FC_FID_WELL_KNOWN_BASE) + continue; /* 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)) + if (acc->fp_wwpn == fc_host_port_name(adapter->scsi_host)) continue; - port = zfcp_port_enqueue(adapter, acc->wwpn, - ZFCP_STATUS_PORT_DID_DID | + port = zfcp_port_enqueue(adapter, acc->fp_wwpn, ZFCP_STATUS_COMMON_NOESC, d_id); - if (IS_ERR(port)) + if (!IS_ERR(port)) + zfcp_erp_port_reopen(port, 0, "fcegpf1"); + else if (PTR_ERR(port) != -EEXIST) ret = PTR_ERR(port); - else - zfcp_erp_port_reopen(port, 0, 149, NULL); - 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); + write_lock_irqsave(&adapter->port_list_lock, flags); + list_for_each_entry_safe(port, tmp, &adapter->port_list, list) + zfcp_fc_validate_port(port, &remove_lh); + write_unlock_irqrestore(&adapter->port_list_lock, flags); + + list_for_each_entry_safe(port, tmp, &remove_lh, list) { + zfcp_erp_port_shutdown(port, 0, "fcegpf2"); + device_unregister(&port->dev); + } + return ret; } /** - * zfcp_scan_ports - scan remote ports and attach new ports - * @adapter: pointer to struct zfcp_adapter + * zfcp_fc_scan_ports - scan remote ports and attach new ports + * @work: reference to scheduled work */ -int zfcp_scan_ports(struct zfcp_adapter *adapter) +void zfcp_fc_scan_ports(struct work_struct *work) { + struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, + scan_work); int ret, i; - struct zfcp_gpn_ft *gpn_ft; + struct zfcp_fc_req *fc_req; + int chain, max_entries, buf_num, max_bytes; - zfcp_erp_wait(adapter); /* wait until adapter is finished with ERP */ - if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT) - return 0; + chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; + buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1; + max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE; + max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE; - ret = zfcp_scan_get_nameserver(adapter); - if (ret) - return ret; + if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && + fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) + return; - gpn_ft = zfcp_alloc_sg_env(); - if (!gpn_ft) - return -ENOMEM; + if (zfcp_fc_wka_port_get(&adapter->gs->ds)) + return; + + fc_req = zfcp_alloc_sg_env(buf_num); + if (!fc_req) + goto out; for (i = 0; i < 3; i++) { - ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter); + ret = zfcp_fc_send_gpn_ft(fc_req, adapter, max_bytes); if (!ret) { - ret = zfcp_scan_eval_gpn_ft(gpn_ft); + ret = zfcp_fc_eval_gpn_ft(fc_req, adapter, max_entries); if (ret == -EAGAIN) ssleep(1); else break; } } - zfcp_free_sg_env(gpn_ft); + zfcp_sg_free_table(&fc_req->sg_rsp, buf_num); + kmem_cache_free(zfcp_fc_req_cache, fc_req); +out: + zfcp_fc_wka_port_put(&adapter->gs->ds); +} + +static int zfcp_fc_gspn(struct zfcp_adapter *adapter, + struct zfcp_fc_req *fc_req) +{ + DECLARE_COMPLETION_ONSTACK(completion); + char devno[] = "DEVNO:"; + struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; + struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req; + struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp; + int ret; + + zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID, + FC_SYMBOLIC_NAME_SIZE); + hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host)); + + sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req)); + sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp)); + + ct_els->handler = zfcp_fc_complete; + ct_els->handler_data = &completion; + ct_els->req = &fc_req->sg_req; + ct_els->resp = &fc_req->sg_rsp; + + ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, + ZFCP_FC_CTELS_TMO); + if (ret) + return ret; + + wait_for_completion(&completion); + if (ct_els->status) + return ct_els->status; + + if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV && + !(strstr(gspn_rsp->gspn.fp_name, devno))) + snprintf(fc_host_symbolic_name(adapter->scsi_host), + FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s", + gspn_rsp->gspn.fp_name, devno, + dev_name(&adapter->ccw_device->dev), + init_utsname()->nodename); + else + strlcpy(fc_host_symbolic_name(adapter->scsi_host), + gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE); + + return 0; +} + +static void zfcp_fc_rspn(struct zfcp_adapter *adapter, + struct zfcp_fc_req *fc_req) +{ + DECLARE_COMPLETION_ONSTACK(completion); + struct Scsi_Host *shost = adapter->scsi_host; + struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; + struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req; + struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp; + int ret, len; + + zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID, + FC_SYMBOLIC_NAME_SIZE); + hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost)); + len = strlcpy(rspn_req->rspn.fr_name, fc_host_symbolic_name(shost), + FC_SYMBOLIC_NAME_SIZE); + rspn_req->rspn.fr_name_len = len; + + sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req)); + sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp)); + + ct_els->handler = zfcp_fc_complete; + ct_els->handler_data = &completion; + ct_els->req = &fc_req->sg_req; + ct_els->resp = &fc_req->sg_rsp; + + ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, + ZFCP_FC_CTELS_TMO); + if (!ret) + wait_for_completion(&completion); +} + +/** + * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name + * @work: ns_up_work of the adapter where to update the symbolic port name + * + * Retrieve the current symbolic port name that may have been set by + * the hardware using the GSPN request and update the fc_host + * symbolic_name sysfs attribute. When running in NPIV mode (and hence + * the port name is unique for this system), update the symbolic port + * name to add Linux specific information and update the FC nameserver + * using the RSPN request. + */ +void zfcp_fc_sym_name_update(struct work_struct *work) +{ + struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, + ns_up_work); + int ret; + struct zfcp_fc_req *fc_req; + + if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && + fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) + return; + + fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL); + if (!fc_req) + return; + + ret = zfcp_fc_wka_port_get(&adapter->gs->ds); + if (ret) + goto out_free; + + ret = zfcp_fc_gspn(adapter, fc_req); + if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) + goto out_ds_put; + + memset(fc_req, 0, sizeof(*fc_req)); + zfcp_fc_rspn(adapter, fc_req); + +out_ds_put: + zfcp_fc_wka_port_put(&adapter->gs->ds); +out_free: + kmem_cache_free(zfcp_fc_req_cache, fc_req); +} + +static void zfcp_fc_ct_els_job_handler(void *data) +{ + struct fc_bsg_job *job = data; + struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data; + struct fc_bsg_reply *jr = job->reply; + + jr->reply_payload_rcv_len = job->reply_payload.payload_len; + jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; + jr->result = zfcp_ct_els->status ? -EIO : 0; + job->job_done(job); +} + +static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct fc_bsg_job *job) +{ + u32 preamble_word1; + u8 gs_type; + struct zfcp_adapter *adapter; + + preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; + gs_type = (preamble_word1 & 0xff000000) >> 24; + + adapter = (struct zfcp_adapter *) job->shost->hostdata[0]; + + switch (gs_type) { + case FC_FST_ALIAS: + return &adapter->gs->as; + case FC_FST_MGMT: + return &adapter->gs->ms; + case FC_FST_TIME: + return &adapter->gs->ts; + break; + case FC_FST_DIR: + return &adapter->gs->ds; + break; + default: + return NULL; + } +} + +static void zfcp_fc_ct_job_handler(void *data) +{ + struct fc_bsg_job *job = data; + struct zfcp_fc_wka_port *wka_port; + + wka_port = zfcp_fc_job_wka_port(job); + zfcp_fc_wka_port_put(wka_port); + + zfcp_fc_ct_els_job_handler(data); +} + +static int zfcp_fc_exec_els_job(struct fc_bsg_job *job, + struct zfcp_adapter *adapter) +{ + struct zfcp_fsf_ct_els *els = job->dd_data; + struct fc_rport *rport = job->rport; + struct zfcp_port *port; + u32 d_id; + + if (rport) { + port = zfcp_get_port_by_wwpn(adapter, rport->port_name); + if (!port) + return -EINVAL; + + d_id = port->d_id; + put_device(&port->dev); + } else + d_id = ntoh24(job->request->rqst_data.h_els.port_id); + + els->handler = zfcp_fc_ct_els_job_handler; + return zfcp_fsf_send_els(adapter, d_id, els, job->req->timeout / HZ); +} + +static int zfcp_fc_exec_ct_job(struct fc_bsg_job *job, + struct zfcp_adapter *adapter) +{ + int ret; + struct zfcp_fsf_ct_els *ct = job->dd_data; + struct zfcp_fc_wka_port *wka_port; + + wka_port = zfcp_fc_job_wka_port(job); + if (!wka_port) + return -EINVAL; + + ret = zfcp_fc_wka_port_get(wka_port); + if (ret) + return ret; + + ct->handler = zfcp_fc_ct_job_handler; + ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->req->timeout / HZ); + if (ret) + zfcp_fc_wka_port_put(wka_port); return ret; } +int zfcp_fc_exec_bsg_job(struct fc_bsg_job *job) +{ + struct Scsi_Host *shost; + struct zfcp_adapter *adapter; + struct zfcp_fsf_ct_els *ct_els = job->dd_data; + + shost = job->rport ? rport_to_shost(job->rport) : job->shost; + adapter = (struct zfcp_adapter *)shost->hostdata[0]; + + if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) + return -EINVAL; + + ct_els->req = job->request_payload.sg_list; + ct_els->resp = job->reply_payload.sg_list; + ct_els->handler_data = job; + + switch (job->request->msgcode) { + case FC_BSG_RPT_ELS: + case FC_BSG_HST_ELS_NOLOGIN: + return zfcp_fc_exec_els_job(job, adapter); + case FC_BSG_RPT_CT: + case FC_BSG_HST_CT: + return zfcp_fc_exec_ct_job(job, adapter); + default: + return -EINVAL; + } +} + +int zfcp_fc_timeout_bsg_job(struct fc_bsg_job *job) +{ + /* hardware tracks timeout, reset bsg timeout to not interfere */ + return -EAGAIN; +} + +int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) +{ + struct zfcp_fc_wka_ports *wka_ports; + + wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL); + if (!wka_ports) + return -ENOMEM; + + adapter->gs = wka_ports; + zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); + zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); + zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); + zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); + + return 0; +} -void _zfcp_scan_ports_later(struct work_struct *work) +void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) { - zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); + kfree(adapter->gs); + adapter->gs = NULL; } + |