* Wolfgang Taphorn
* Stefan Bader <stefan.bader@de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com>
+ * Andreas Herrmann <aherrman@de.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#define ZFCP_LOG_AREA ZFCP_LOG_AREA_ERP
-/* this drivers version (do not edit !!! generated and updated by cvs) */
-#define ZFCP_ERP_REVISION "$Revision: 1.51 $"
+#define ZFCP_ERP_REVISION "$Revision: 1.86 $"
#include "zfcp_ext.h"
-static int zfcp_els(struct zfcp_port *, u8);
-static int zfcp_els_handler(unsigned long);
+static int zfcp_erp_adisc(struct zfcp_adapter *, fc_id_t);
+static void zfcp_erp_adisc_handler(unsigned long);
static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *, int);
static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *, int);
static void zfcp_erp_timeout_handler(unsigned long);
static inline void zfcp_erp_timeout_init(struct zfcp_erp_action *);
-/*
- * function: zfcp_erp_adapter_shutdown_all
- *
- * purpose: recursively calls zfcp_erp_adapter_shutdown to stop all
- * IO on each adapter, return all outstanding packets and
- * relinquish all IRQs
- * Note: This function waits for completion of all shutdowns
+/**
+ * zfcp_fsf_request_timeout_handler - called if a request timed out
+ * @data: pointer to adapter for handler function
*
- * returns: 0 in all cases
+ * This function needs to be called if requests (ELS, Generic Service,
+ * or SCSI commands) exceed a certain time limit. The assumption is
+ * that after the time limit the adapter get stuck. So we trigger a reopen of
+ * the adapter. This should not be used for error recovery, SCSI abort
+ * commands and SCSI requests from SCSI mid-layer.
*/
-int
-zfcp_erp_adapter_shutdown_all(void)
+void
+zfcp_fsf_request_timeout_handler(unsigned long data)
{
- int retval = 0;
- unsigned long flags;
struct zfcp_adapter *adapter;
- read_lock_irqsave(&zfcp_data.config_lock, flags);
- list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list)
- zfcp_erp_adapter_shutdown(adapter, 0);
- read_unlock_irqrestore(&zfcp_data.config_lock, flags);
-
- /*
- * FIXME : need to take config_lock but cannot, since we schedule here.
- */
- /* start all shutdowns first before any waiting to allow for concurreny */
- list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list)
- zfcp_erp_wait(adapter);
+ adapter = (struct zfcp_adapter *) data;
- return retval;
+ zfcp_erp_adapter_reopen(adapter, 0);
}
/*
}
-/*
- * function: zfcp_els
- *
- * purpose: Originator of the ELS commands
- *
- * returns: 0 - Operation completed successfuly
- * -EINVAL - Unknown IOCTL command or invalid sense data record
- * -ENOMEM - Insufficient memory
- * -EPERM - Cannot create or queue FSF request
+/**
+ * zfcp_erp_adisc - send ADISC ELS command
+ * @adapter: adapter structure
+ * @d_id: d_id of port where ADISC is sent to
*/
int
-zfcp_els(struct zfcp_port *port, u8 ls_code)
+zfcp_erp_adisc(struct zfcp_adapter *adapter, fc_id_t d_id)
{
struct zfcp_send_els *send_els;
- struct zfcp_ls_rls *rls;
- struct zfcp_ls_pdisc *pdisc;
struct zfcp_ls_adisc *adisc;
- struct page *page = NULL;
- void *req;
+ void *address = NULL;
int retval = 0;
+ struct timer_list *timer;
send_els = kmalloc(sizeof(struct zfcp_send_els), GFP_ATOMIC);
if (send_els == NULL)
goto nomem;
+ memset(send_els, 0, sizeof(*send_els));
send_els->req = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC);
if (send_els->req == NULL)
goto nomem;
- send_els->req_count = 1;
+ memset(send_els->req, 0, sizeof(*send_els->req));
send_els->resp = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC);
if (send_els->resp == NULL)
goto nomem;
- send_els->resp_count = 1;
+ memset(send_els->resp, 0, sizeof(*send_els->resp));
- page = alloc_pages(GFP_ATOMIC, 0);
- if (page == NULL)
+ address = (void *) get_zeroed_page(GFP_ATOMIC);
+ if (address == NULL)
goto nomem;
- send_els->req->page = page;
- send_els->resp->page = page;
- send_els->req->offset = 0;
- send_els->resp->offset = PAGE_SIZE >> 1;
-
- send_els->port = port;
- send_els->ls_code = ls_code;
- send_els->handler = zfcp_els_handler;
- send_els->handler_data = (unsigned long)send_els;
- send_els->completion = NULL;
-
- req = zfcp_sg_to_address(send_els->req);
-
- *(u32*)req = 0;
- *(u8*)req = ls_code;
-
- switch (ls_code) {
- case ZFCP_LS_RTV:
- send_els->req->length = sizeof(struct zfcp_ls_rtv);
- send_els->resp->length = sizeof(struct zfcp_ls_rtv_acc);
- ZFCP_LOG_INFO("RTV request from s_id 0x%08x to d_id 0x%08x\n",
- port->adapter->s_id, port->d_id);
- break;
-
- case ZFCP_LS_RLS:
- send_els->req->length = sizeof(struct zfcp_ls_rls);
- send_els->resp->length = sizeof(struct zfcp_ls_rls_acc);
- rls = (struct zfcp_ls_rls*)req;
- rls->port_id = port->adapter->s_id;
- ZFCP_LOG_INFO("RLS request from s_id 0x%08x to d_id 0x%08x "
- "(port_id=0x%08x)\n",
- port->adapter->s_id, port->d_id, rls->port_id);
- break;
-
- case ZFCP_LS_PDISC:
- send_els->req->length = sizeof(struct zfcp_ls_pdisc);
- send_els->resp->length = sizeof(struct zfcp_ls_pdisc_acc);
- pdisc = (struct zfcp_ls_pdisc*)req;
- pdisc->wwpn = port->adapter->wwpn;
- pdisc->wwnn = port->adapter->wwnn;
- ZFCP_LOG_INFO("PDISC request from s_id 0x%08x to d_id 0x%08x "
- "(wwpn=0x%016Lx, wwnn=0x%016Lx)\n",
- port->adapter->s_id, port->d_id,
- pdisc->wwpn, pdisc->wwnn);
- break;
-
- case ZFCP_LS_ADISC:
- send_els->req->length = sizeof(struct zfcp_ls_adisc);
- send_els->resp->length = sizeof(struct zfcp_ls_adisc_acc);
- adisc = (struct zfcp_ls_adisc*)req;
- adisc->hard_nport_id = port->adapter->s_id;
- adisc->wwpn = port->adapter->wwpn;
- adisc->wwnn = port->adapter->wwnn;
- adisc->nport_id = port->adapter->s_id;
- ZFCP_LOG_INFO("ADISC request from s_id 0x%08x to d_id 0x%08x "
- "(wwpn=0x%016Lx, wwnn=0x%016Lx, "
- "hard_nport_id=0x%08x, nport_id=0x%08x)\n",
- port->adapter->s_id, port->d_id,
- adisc->wwpn, adisc->wwnn,
- adisc->hard_nport_id, adisc->nport_id);
- break;
+ zfcp_address_to_sg(address, send_els->req);
+ address += PAGE_SIZE >> 1;
+ zfcp_address_to_sg(address, send_els->resp);
+ send_els->req_count = send_els->resp_count = 1;
+
+ send_els->adapter = adapter;
+ send_els->d_id = d_id;
+ send_els->handler = zfcp_erp_adisc_handler;
+ send_els->handler_data = (unsigned long) send_els;
+
+ adisc = zfcp_sg_to_address(send_els->req);
+ send_els->ls_code = adisc->code = ZFCP_LS_ADISC;
+
+ send_els->req->length = sizeof(struct zfcp_ls_adisc);
+ send_els->resp->length = sizeof(struct zfcp_ls_adisc_acc);
+
+ /* 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->wwpn = adapter->wwpn;
+ adisc->wwnn = adapter->wwnn;
+ adisc->nport_id = adapter->s_id;
+ ZFCP_LOG_INFO("ADISC request from s_id 0x%08x to d_id 0x%08x "
+ "(wwpn=0x%016Lx, wwnn=0x%016Lx, "
+ "hard_nport_id=0x%08x, nport_id=0x%08x)\n",
+ adapter->s_id, d_id, (wwn_t) adisc->wwpn,
+ (wwn_t) adisc->wwnn, adisc->hard_nport_id,
+ adisc->nport_id);
+
+ timer = kmalloc(sizeof(struct timer_list), GFP_ATOMIC);
+ if (!timer)
+ goto nomem;
- default:
- ZFCP_LOG_NORMAL("ELS command code 0x%02x is not supported\n",
- ls_code);
- retval = -EINVAL;
- goto invalid_ls_code;
- }
+ init_timer(timer);
+ timer->function = zfcp_fsf_request_timeout_handler;
+ timer->data = (unsigned long) adapter;
+ timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
+ send_els->timer = timer;
retval = zfcp_fsf_send_els(send_els);
if (retval != 0) {
ZFCP_LOG_NORMAL("error: initiation of Send ELS failed for port "
- "0x%016Lx on adapter %s\n",
- port->wwpn, zfcp_get_busid_by_port(port));
- retval = -EPERM;
+ "0x%08x on adapter %s\n", d_id,
+ zfcp_get_busid_by_adapter(adapter));
+ del_timer(send_els->timer);
+ goto freemem;
}
goto out;
-nomem:
- ZFCP_LOG_DEBUG("out of memory\n");
+ nomem:
retval = -ENOMEM;
-
-invalid_ls_code:
- if (page != NULL)
- __free_pages(page, 0);
+ freemem:
+ if (address != NULL)
+ __free_pages(send_els->req->page, 0);
if (send_els != NULL) {
- if (send_els->req != NULL)
- kfree(send_els->req);
- if (send_els->resp != NULL)
- kfree(send_els->resp);
+ kfree(send_els->timer);
+ kfree(send_els->req);
+ kfree(send_els->resp);
kfree(send_els);
}
-
-out:
+ out:
return retval;
}
-/*
- * function: zfcp_els_handler
- *
- * purpose: Handler for all kind of ELSs
+/**
+ * zfcp_erp_adisc_handler - handler for ADISC ELS command
+ * @data: pointer to struct zfcp_send_els
*
- * returns: 0 - Operation completed successfuly
- * -ENXIO - ELS has been rejected
- * -EPERM - Port forced reopen failed
+ * If ADISC failed (LS_RJT or timed out) forced reopen of the port is triggered.
*/
-int
-zfcp_els_handler(unsigned long data)
-{
- struct zfcp_send_els *send_els = (struct zfcp_send_els*)data;
- struct zfcp_port *port = send_els->port;
- struct zfcp_ls_rjt *rjt;
- struct zfcp_ls_rtv_acc *rtv;
- struct zfcp_ls_rls_acc *rls;
- struct zfcp_ls_pdisc_acc *pdisc;
+void
+zfcp_erp_adisc_handler(unsigned long data)
+{
+ struct zfcp_send_els *send_els;
+ struct zfcp_port *port;
+ struct zfcp_adapter *adapter;
+ fc_id_t d_id;
struct zfcp_ls_adisc_acc *adisc;
- void *req, *resp;
- u8 req_code, resp_code;
- int retval = 0;
-
- if (send_els->status != 0)
- goto skip_fsfstatus;
-
- req = (void*)((page_to_pfn(send_els->req->page) << PAGE_SHIFT) + send_els->req->offset);
- resp = (void*)((page_to_pfn(send_els->resp->page) << PAGE_SHIFT) + send_els->resp->offset);
- req_code = *(u8*)req;
- resp_code = *(u8*)resp;
-
- switch (resp_code) {
-
- case ZFCP_LS_RJT:
- rjt = (struct zfcp_ls_rjt*)resp;
- switch (rjt->reason_code) {
+ send_els = (struct zfcp_send_els *) data;
- case ZFCP_LS_RJT_INVALID_COMMAND_CODE:
- ZFCP_LOG_INFO("invalid LS command code "
- "(wwpn=0x%016Lx, command=0x%02x)\n",
- port->wwpn, req_code);
- break;
-
- case ZFCP_LS_RJT_LOGICAL_ERROR:
- ZFCP_LOG_INFO("logical error (wwpn=0x%016Lx, "
- "reason_expl=0x%02x)\n",
- port->wwpn, rjt->reason_expl);
- break;
-
- case ZFCP_LS_RJT_LOGICAL_BUSY:
- ZFCP_LOG_INFO("logical busy (wwpn=0x%016Lx, "
- "reason_expl=0x%02x)\n",
- port->wwpn, rjt->reason_expl);
- break;
-
- case ZFCP_LS_RJT_PROTOCOL_ERROR:
- ZFCP_LOG_INFO("protocol error (wwpn=0x%016Lx, "
- "reason_expl=0x%02x)\n",
- port->wwpn, rjt->reason_expl);
- break;
+ del_timer(send_els->timer);
- case ZFCP_LS_RJT_UNABLE_TO_PERFORM:
- ZFCP_LOG_INFO("unable to perform command requested "
- "(wwpn=0x%016Lx, reason_expl=0x%02x)\n",
- port->wwpn, rjt->reason_expl);
- break;
+ adapter = send_els->adapter;
+ d_id = send_els->d_id;
- case ZFCP_LS_RJT_COMMAND_NOT_SUPPORTED:
- ZFCP_LOG_INFO("command not supported (wwpn=0x%016Lx, "
- "command=0x%02x)\n",
- port->wwpn, req_code);
- break;
+ read_lock(&zfcp_data.config_lock);
+ port = zfcp_get_port_by_did(send_els->adapter, send_els->d_id);
+ read_unlock(&zfcp_data.config_lock);
- case ZFCP_LS_RJT_VENDOR_UNIQUE_ERROR:
- ZFCP_LOG_INFO("vendor specific error (wwpn=0x%016Lx, "
- "vendor_unique=0x%02x)\n",
- port->wwpn, rjt->vendor_unique);
- break;
+ BUG_ON(port == NULL);
- default:
- ZFCP_LOG_NORMAL("ELS rejected by remote port 0x%016Lx "
- "on adapter %s (reason_code=0x%02x)\n",
- port->wwpn,
+ /* request rejected or timed out */
+ if (send_els->status != 0) {
+ ZFCP_LOG_NORMAL("ELS request rejected/timed out, "
+ "force physical port reopen "
+ "(adapter %s, port d_id=0x%08x)\n",
+ zfcp_get_busid_by_adapter(adapter), d_id);
+ debug_text_event(adapter->erp_dbf, 3, "forcreop");
+ if (zfcp_erp_port_forced_reopen(port, 0))
+ ZFCP_LOG_NORMAL("failed reopen of port "
+ "(adapter %s, wwpn=0x%016Lx)\n",
zfcp_get_busid_by_port(port),
- rjt->reason_code);
- }
- retval = -ENXIO;
- break;
-
- case ZFCP_LS_ACC:
- switch (req_code) {
-
- case ZFCP_LS_RTV:
- rtv = (struct zfcp_ls_rtv_acc*)resp;
- ZFCP_LOG_INFO("RTV response from d_id 0x%08x to s_id "
- "0x%08x (R_A_TOV=%ds E_D_TOV=%d%cs)\n",
- port->d_id, port->adapter->s_id,
- rtv->r_a_tov, rtv->e_d_tov,
- rtv->qualifier &
- ZFCP_LS_RTV_E_D_TOV_FLAG ? 'n' : 'm');
- break;
-
- case ZFCP_LS_RLS:
- rls = (struct zfcp_ls_rls_acc*)resp;
- ZFCP_LOG_INFO("RLS response from d_id 0x%08x to s_id "
- "0x%08x (link_failure_count=%u, "
- "loss_of_sync_count=%u, "
- "loss_of_signal_count=%u, "
- "primitive_sequence_protocol_error=%u, "
- "invalid_transmition_word=%u, "
- "invalid_crc_count=%u)\n",
- port->d_id, port->adapter->s_id,
- rls->link_failure_count,
- rls->loss_of_sync_count,
- rls->loss_of_signal_count,
- rls->prim_seq_prot_error,
- rls->invalid_transmition_word,
- rls->invalid_crc_count);
- break;
-
- case ZFCP_LS_PDISC:
- pdisc = (struct zfcp_ls_pdisc_acc*)resp;
- ZFCP_LOG_INFO("PDISC response from d_id 0x%08x to s_id "
- "0x%08x (wwpn=0x%016Lx, wwnn=0x%016Lx, "
- "vendor='%-16s')\n", port->d_id,
- port->adapter->s_id, pdisc->wwpn,
- pdisc->wwnn, pdisc->vendor_version);
- break;
-
- case ZFCP_LS_ADISC:
- adisc = (struct zfcp_ls_adisc_acc*)resp;
- ZFCP_LOG_INFO("ADISC response from d_id 0x%08x to s_id "
- "0x%08x (wwpn=0x%016Lx, wwnn=0x%016Lx, "
- "hard_nport_id=0x%08x, "
- "nport_id=0x%08x)\n", port->d_id,
- port->adapter->s_id, adisc->wwpn,
- adisc->wwnn, adisc->hard_nport_id,
- adisc->nport_id);
- /* FIXME: set wwnn in during open port */
- if (port->wwnn == 0)
- port->wwnn = adisc->wwnn;
- break;
- }
- break;
+ port->wwpn);
+ goto out;
+ }
- default:
- ZFCP_LOG_NORMAL("unknown payload code 0x%02x received for "
- "request 0x%02x to d_id 0x%08x, reopen needed "
- "for port 0x%016Lx on adapter %s\n", resp_code,
- req_code, port->d_id, port->wwpn,
- zfcp_get_busid_by_port(port));
- retval = zfcp_erp_port_forced_reopen(port, 0);
- if (retval != 0) {
- ZFCP_LOG_NORMAL("reopen of remote port 0x%016Lx on "
- "adapter %s failed\n", port->wwpn,
- zfcp_get_busid_by_port(port));
- retval = -EPERM;
- }
+ adisc = zfcp_sg_to_address(send_els->resp);
+
+ ZFCP_LOG_INFO("ADISC response from d_id 0x%08x to s_id "
+ "0x%08x (wwpn=0x%016Lx, wwnn=0x%016Lx, "
+ "hard_nport_id=0x%08x, nport_id=0x%08x)\n",
+ d_id, adapter->s_id, (wwn_t) adisc->wwpn,
+ (wwn_t) adisc->wwnn, adisc->hard_nport_id,
+ adisc->nport_id);
+
+ /* set wwnn for port */
+ if (port->wwnn == 0)
+ port->wwnn = adisc->wwnn;
+
+ if (port->wwpn != adisc->wwpn) {
+ ZFCP_LOG_NORMAL("d_id assignment changed, reopening "
+ "port (adapter %s, wwpn=0x%016Lx, "
+ "adisc_resp_wwpn=0x%016Lx)\n",
+ zfcp_get_busid_by_port(port),
+ port->wwpn, (wwn_t) adisc->wwpn);
+ if (zfcp_erp_port_reopen(port, 0))
+ ZFCP_LOG_NORMAL("failed reopen of port "
+ "(adapter %s, wwpn=0x%016Lx)\n",
+ zfcp_get_busid_by_port(port),
+ port->wwpn);
}
-skip_fsfstatus:
+ out:
+ zfcp_port_put(port);
__free_pages(send_els->req->page, 0);
+ kfree(send_els->timer);
kfree(send_els->req);
kfree(send_els->resp);
-
- return retval;
+ kfree(send_els);
}
-/*
- * function: zfcp_test_link
- *
- * purpose: Test a status of a link to a remote port using the ELS command ADISC
+/**
+ * zfcp_test_link - lightweight link test procedure
+ * @port: port to be tested
*
- * returns: 0 - Link is OK
- * -EPERM - Port forced reopen failed
+ * Test status of a link to a remote port using the ELS command ADISC.
*/
int
zfcp_test_link(struct zfcp_port *port)
{
int retval;
- retval = zfcp_els(port, ZFCP_LS_ADISC);
+ zfcp_port_get(port);
+ retval = zfcp_erp_adisc(port->adapter, port->d_id);
if (retval != 0) {
+ zfcp_port_put(port);
ZFCP_LOG_NORMAL("reopen needed for port 0x%016Lx "
"on adapter %s\n ", port->wwpn,
zfcp_get_busid_by_port(port));
return retval;
}
-/*
- * function:
- *
- * purpose: Wrappper for zfcp_erp_port_reopen_internal
- * used to ensure the correct locking
+/**
+ * zfcp_erp_port_reopen - initiate reopen of a remote port
+ * @port: port to be reopened
+ * @clear_mask: specifies flags in port status to be cleared
+ * Return: 0 on success, < 0 on error
*
- * returns: 0 - initiated action succesfully
- * <0 - failed to initiate action
+ * This is a wrappper function for zfcp_erp_port_reopen_internal. It ensures
+ * correct locking. An error recovery task is initiated to do the reopen.
+ * To wait for the completion of the reopen zfcp_erp_wait should be used.
*/
int
zfcp_erp_port_reopen(struct zfcp_port *port, int clear_mask)
return retval;
}
-/*
- * function:
- *
- * purpose: Wrappper for zfcp_erp_unit_reopen_internal
- * used to ensure the correct locking
+/**
+ * zfcp_erp_unit_reopen - initiate reopen of a unit
+ * @unit: unit to be reopened
+ * @clear_mask: specifies flags in unit status to be cleared
+ * Return: 0 on success, < 0 on error
*
- * returns: 0 - initiated action succesfully
- * <0 - failed to initiate action
+ * This is a wrappper for zfcp_erp_unit_reopen_internal. It ensures correct
+ * locking. An error recovery task is initiated to do the reopen.
+ * To wait for the completion of the reopen zfcp_erp_wait should be used.
*/
int
zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear_mask)
debug_event(adapter->erp_dbf, 2, &erp_action->action,
sizeof (int));
if (!(set_mask & ZFCP_STATUS_ERP_TIMEDOUT))
- del_timer_sync(&erp_action->timer);
+ del_timer(&erp_action->timer);
erp_action->status |= set_mask;
zfcp_erp_action_ready(erp_action);
retval = 0;
zfcp_erp_modify_port_status(port,
ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
- ZFCP_LOG_NORMAL("port erp failed on port 0x%016Lx on adapter %s\n",
- port->wwpn, zfcp_get_busid_by_port(port));
+ if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
+ ZFCP_LOG_NORMAL("port erp failed (adapter %s, "
+ "port d_id=0x%08x)\n",
+ zfcp_get_busid_by_port(port), port->d_id);
+ else
+ ZFCP_LOG_NORMAL("port erp failed (adapter %s, wwpn=0x%016Lx)\n",
+ zfcp_get_busid_by_port(port), port->wwpn);
+
debug_text_event(port->adapter->erp_dbf, 2, "p_pfail");
debug_event(port->adapter->erp_dbf, 2, &port->wwpn, sizeof (wwn_t));
}
!(ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status));
}
-/**
- * zfcp_erp_scsi_add_device
- * @data: pointer to a struct zfcp_unit
- *
- * Registers a logical unit with the SCSI stack.
- */
-static void
-zfcp_erp_scsi_add_device(void *data)
-{
- struct {
- struct zfcp_unit *unit;
- struct work_struct work;
- } *p;
-
- p = data;
- scsi_add_device(p->unit->port->adapter->scsi_host,
- 0, p->unit->port->scsi_id, p->unit->scsi_lun);
- atomic_set(&p->unit->scsi_add_work, 0);
- wake_up(&p->unit->scsi_add_wq);
- zfcp_unit_put(p->unit);
- kfree(p);
-}
-
-/**
- * zfcp_erp_schedule_work
- * @unit: pointer to unit which should be registered with SCSI stack
- *
- * Schedules work which registers a unit with the SCSI stack
- */
-static int
-zfcp_erp_schedule_work(struct zfcp_unit *unit)
-{
- struct {
- struct zfcp_unit * unit;
- struct work_struct work;
- } *p;
-
- if (atomic_compare_and_swap(0, 1, &unit->scsi_add_work))
- return 0;
-
- if ((p = kmalloc(sizeof(*p), GFP_KERNEL)) == NULL) {
- ZFCP_LOG_NORMAL("error: registration at SCSI stack failed for "
- "unit 0x%016Lx on port 0x%016Lx on "
- "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
- zfcp_get_busid_by_unit(unit));
- atomic_set(&unit->scsi_add_work, 0);
- return -ENOMEM;
- }
-
- zfcp_unit_get(unit);
- memset(p, 0, sizeof(*p));
- INIT_WORK(&p->work, zfcp_erp_scsi_add_device, p);
- p->unit = unit;
- schedule_work(&p->work);
- return 0;
-}
-
/*
* function:
*
static int
zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter)
{
- int retval = 0;
unsigned long flags;
- struct zfcp_port *nport = adapter->nameserver_port;
read_lock_irqsave(&zfcp_data.config_lock, flags);
read_lock(&adapter->erp_lock);
if (list_empty(&adapter->erp_ready_head) &&
list_empty(&adapter->erp_running_head)) {
- if (nport
- && atomic_test_mask(ZFCP_STATUS_COMMON_OPEN,
- &nport->status)) {
- debug_text_event(adapter->erp_dbf, 4, "a_cq_nspsd");
- /* taking down nameserver port */
- zfcp_erp_port_reopen_internal(nport,
- ZFCP_STATUS_COMMON_RUNNING |
- ZFCP_STATUS_COMMON_ERP_FAILED);
- } else {
debug_text_event(adapter->erp_dbf, 4, "a_cq_wake");
atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
&adapter->status);
wake_up(&adapter->erp_done_wqh);
- }
} else
debug_text_event(adapter->erp_dbf, 5, "a_cq_notempty");
read_unlock(&adapter->erp_lock);
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
- return retval;
+ return 0;
}
-/*
- * function:
- *
- * purpose:
- *
- * returns:
+/**
+ * zfcp_erp_wait - wait for completion of error recovery on an adapter
+ * @adapter: adapter for which to wait for completion of its error recovery
+ * Return: 0
*/
int
zfcp_erp_wait(struct zfcp_adapter *adapter)
struct zfcp_port *port;
list_for_each_entry(port, &adapter->port_list_head, list)
- if (!atomic_test_mask(ZFCP_STATUS_PORT_NAMESERVER, &port->status))
+ if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
zfcp_erp_port_reopen_internal(port, clear_mask);
return retval;
zfcp_erp_adapter_strategy(struct zfcp_erp_action *erp_action)
{
int retval;
- unsigned long timeout;
struct zfcp_adapter *adapter = erp_action->adapter;
retval = zfcp_erp_adapter_strategy_close(erp_action);
ZFCP_LOG_INFO("Waiting to allow the adapter %s "
"to recover itself\n",
zfcp_get_busid_by_adapter(adapter));
- /*
- * SUGGESTION: substitute by
- * timeout = ZFCP_TYPE2_RECOVERY_TIME;
- * __ZFCP_WAIT_EVENT_TIMEOUT(timeout, 0);
- */
- timeout = ZFCP_TYPE2_RECOVERY_TIME;
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(timeout);
+ msleep(jiffies_to_msecs(ZFCP_TYPE2_RECOVERY_TIME));
}
return retval;
int i;
volatile struct qdio_buffer_element *sbale;
struct zfcp_adapter *adapter = erp_action->adapter;
- int retval_cleanup = 0;
if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
ZFCP_LOG_NORMAL("bug: second attempt to set up QDIO on "
if (qdio_establish(&adapter->qdio_init_data) != 0) {
ZFCP_LOG_INFO("error: establishment of QDIO queues failed "
- "on adapter %s\n.",
+ "on adapter %s\n",
zfcp_get_busid_by_adapter(adapter));
goto failed_qdio_establish;
}
- ZFCP_LOG_DEBUG("queues established\n");
+ debug_text_event(adapter->erp_dbf, 3, "qdio_est");
if (qdio_activate(adapter->ccw_device, 0) != 0) {
ZFCP_LOG_INFO("error: activation of QDIO queues failed "
zfcp_get_busid_by_adapter(adapter));
goto failed_qdio_activate;
}
- ZFCP_LOG_DEBUG("queues activated\n");
+ debug_text_event(adapter->erp_dbf, 3, "qdio_act");
/*
* put buffers into response queue,
/* NOP */
failed_qdio_activate:
- /* DEBUG */
- //__ZFCP_WAIT_EVENT_TIMEOUT(timeout, 0);
- /* cleanup queues previously established */
- retval_cleanup = qdio_shutdown(adapter->ccw_device,
- QDIO_FLAG_CLEANUP_USING_CLEAR);
- if (retval_cleanup) {
- ZFCP_LOG_NORMAL("bug: shutdown of QDIO queues failed "
- "(retval=%d)\n", retval_cleanup);
- }
+ debug_text_event(adapter->erp_dbf, 3, "qdio_down1a");
+ while (qdio_shutdown(adapter->ccw_device,
+ QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS)
+ msleep(1000);
+ debug_text_event(adapter->erp_dbf, 3, "qdio_down1b");
failed_qdio_establish:
- atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
-
failed_sanity:
retval = ZFCP_ERP_FAILED;
goto out;
}
- /* cleanup queues previously established */
-
/*
- * MUST NOT LOCK - qdio_cleanup might call schedule
- * FIXME: need another way to make cleanup safe
- */
- /* Note:
- * We need the request_queue lock here, otherwise there exists the
- * following race:
- *
- * queuecommand calls create_fcp_commmand_task...calls req_create,
- * gets sbal x to x+y - meanwhile adapter reopen is called, completes
- * - req_send calls do_QDIO for sbal x to x+y, i.e. wrong indices.
- *
- * with lock:
- * queuecommand calls create_fcp_commmand_task...calls req_create,
- * gets sbal x to x+y - meanwhile adapter reopen is called, waits
- * - req_send calls do_QDIO for sbal x to x+y, i.e. wrong indices
- * but do_QDIO fails as adapter_reopen is still waiting for the lock
- * OR
- * queuecommand calls create_fcp_commmand_task...calls req_create
- * - meanwhile adapter reopen is called...completes,
- * - gets sbal 0 to 0+y, - req_send calls do_QDIO for sbal 0 to 0+y,
- * i.e. correct indices...though an fcp command is called before
- * exchange config data...that should be fine, however
+ * Get queue_lock and clear QDIOUP flag. Thus it's guaranteed that
+ * do_QDIO won't be called while qdio_shutdown is in progress.
*/
- if (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR)) {
- /*
- * FIXME(design):
- * What went wrong? What to do best? Proper retval?
- */
- ZFCP_LOG_NORMAL("bug: shutdown of QDIO queues failed on "
- "adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- } else
- ZFCP_LOG_DEBUG("queues cleaned up\n");
+
+ write_lock_irq(&adapter->request_queue.queue_lock);
+ atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
+ write_unlock_irq(&adapter->request_queue.queue_lock);
+
+ debug_text_event(adapter->erp_dbf, 3, "qdio_down2a");
+ while (qdio_shutdown(adapter->ccw_device,
+ QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS)
+ msleep(1000);
+ debug_text_event(adapter->erp_dbf, 3, "qdio_down2b");
/*
* First we had to stop QDIO operation.
adapter->request_queue.free_index = 0;
atomic_set(&adapter->request_queue.free_count, 0);
adapter->request_queue.distance_from_int = 0;
-
- atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
out:
return retval;
}
atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
&adapter->status);
ZFCP_LOG_DEBUG("Doing exchange config data\n");
+ zfcp_erp_action_to_running(erp_action);
zfcp_erp_timeout_init(erp_action);
if (zfcp_fsf_exchange_config_data(erp_action)) {
retval = ZFCP_ERP_FAILED;
* _must_ be the one belonging to the 'exchange config
* data' request.
*/
- down_interruptible(&adapter->erp_ready_sem);
+ down(&adapter->erp_ready_sem);
if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) {
ZFCP_LOG_INFO("error: exchange of configuration data "
"for adapter %s timed out\n",
ZFCP_LOG_DEBUG("host connection still initialising... "
"waiting and retrying...\n");
/* sleep a little bit before retry */
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(ZFCP_EXCHANGE_CONFIG_DATA_SLEEP);
+ msleep(jiffies_to_msecs(ZFCP_EXCHANGE_CONFIG_DATA_SLEEP));
}
} while ((retries--) &&
atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
{
int retval;
- if (atomic_test_mask(ZFCP_STATUS_PORT_NAMESERVER,
+ if (atomic_test_mask(ZFCP_STATUS_PORT_WKA,
&erp_action->port->status))
retval = zfcp_erp_port_strategy_open_nameserver(erp_action);
else
case ZFCP_ERP_STEP_UNINITIALIZED:
case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
case ZFCP_ERP_STEP_PORT_CLOSING:
+ if (adapter->fc_topology == FSF_TOPO_P2P) {
+ if (port->wwpn != adapter->peer_wwpn) {
+ ZFCP_LOG_NORMAL("Failed to open port 0x%016Lx "
+ "on adapter %s.\nPeer WWPN "
+ "0x%016Lx does not match\n",
+ port->wwpn,
+ zfcp_get_busid_by_adapter(adapter),
+ adapter->peer_wwpn);
+ zfcp_erp_port_failed(port);
+ retval = ZFCP_ERP_FAILED;
+ break;
+ }
+ port->d_id = adapter->peer_d_id;
+ atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
+ retval = zfcp_erp_port_strategy_open_port(erp_action);
+ break;
+ }
if (!(adapter->nameserver_port)) {
retval = zfcp_nameserver_enqueue(adapter);
if (retval != 0) {
/* nameserver port may live again */
atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING,
&adapter->nameserver_port->status);
- if (zfcp_erp_port_reopen(adapter->nameserver_port, 0) >= 0) {
- erp_action->step = ZFCP_ERP_STEP_NAMESERVER_OPEN;
+ if (zfcp_erp_port_reopen(adapter->nameserver_port, 0)
+ >= 0) {
+ erp_action->step =
+ ZFCP_ERP_STEP_NAMESERVER_OPEN;
retval = ZFCP_ERP_CONTINUES;
- } else retval = ZFCP_ERP_FAILED;
+ } else
+ retval = ZFCP_ERP_FAILED;
break;
}
/* else nameserver port is already open, fall through */
case ZFCP_ERP_STEP_PORT_OPENING:
if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) {
- ZFCP_LOG_DEBUG("nameserver port is open\n");
+ ZFCP_LOG_DEBUG("WKA port is open\n");
retval = ZFCP_ERP_SUCCEEDED;
} else {
- ZFCP_LOG_DEBUG("open failed for nameserver port\n");
+ ZFCP_LOG_DEBUG("open failed for WKA port\n");
retval = ZFCP_ERP_FAILED;
}
/* this is needed anyway (dont care for retval of wakeup) */
atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING |
ZFCP_STATUS_COMMON_CLOSING |
+ ZFCP_STATUS_COMMON_ACCESS_DENIED |
ZFCP_STATUS_PORT_DID_DID |
ZFCP_STATUS_PORT_PHYS_CLOSING |
- ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);
+ ZFCP_STATUS_PORT_INVALID_WWPN,
+ &port->status);
return retval;
}
debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t));
atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING |
- ZFCP_STATUS_COMMON_CLOSING, &unit->status);
+ ZFCP_STATUS_COMMON_CLOSING |
+ ZFCP_STATUS_COMMON_ACCESS_DENIED |
+ ZFCP_STATUS_UNIT_SHARED |
+ ZFCP_STATUS_UNIT_READONLY,
+ &unit->status);
return retval;
}
/**
* zfcp_erp_action_cleanup
*
- * registers unit with scsi stack if appropiate and fixes reference counts
+ * Register unit with scsi stack if appropiate and fix reference counts.
+ * Note: Temporary units are not registered with scsi stack.
*/
-
static void
zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter,
struct zfcp_port *port, struct zfcp_unit *unit,
int result)
{
- if ((action == ZFCP_ERP_ACTION_REOPEN_UNIT)
- && (result == ZFCP_ERP_SUCCEEDED)
- && (!unit->device)) {
- zfcp_erp_schedule_work(unit);
- }
switch (action) {
case ZFCP_ERP_ACTION_REOPEN_UNIT:
+ if ((result == ZFCP_ERP_SUCCEEDED)
+ && (!atomic_test_mask(ZFCP_STATUS_UNIT_TEMPORARY,
+ &unit->status))
+ && (!unit->device))
+ scsi_add_device(unit->port->adapter->scsi_host, 0,
+ unit->port->scsi_id, unit->scsi_lun);
zfcp_unit_put(unit);
break;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
list_move(&erp_action->list, &erp_action->adapter->erp_ready_head);
}
+/*
+ * function: zfcp_erp_port_access_denied
+ *
+ * purpose:
+ */
+void
+zfcp_erp_port_access_denied(struct zfcp_port *port)
+{
+ struct zfcp_adapter *adapter = port->adapter;
+ unsigned long flags;
+
+ debug_text_event(adapter->erp_dbf, 3, "p_access_block");
+ debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t));
+ read_lock_irqsave(&zfcp_data.config_lock, flags);
+ zfcp_erp_modify_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED |
+ ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
+ read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+}
+
+/*
+ * function: zfcp_erp_unit_access_denied
+ *
+ * purpose:
+ */
+void
+zfcp_erp_unit_access_denied(struct zfcp_unit *unit)
+{
+ struct zfcp_adapter *adapter = unit->port->adapter;
+
+ debug_text_event(adapter->erp_dbf, 3, "u_access_block");
+ debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t));
+ zfcp_erp_modify_unit_status(unit, ZFCP_STATUS_COMMON_ERP_FAILED |
+ ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
+}
+
+/*
+ * function: zfcp_erp_adapter_access_changed
+ *
+ * purpose:
+ */
+void
+zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter)
+{
+ struct zfcp_port *port;
+ unsigned long flags;
+
+ debug_text_event(adapter->erp_dbf, 3, "a_access_unblock");
+ debug_event(adapter->erp_dbf, 3, &adapter->name, 8);
+
+ read_lock_irqsave(&zfcp_data.config_lock, flags);
+ if (adapter->nameserver_port)
+ zfcp_erp_port_access_changed(adapter->nameserver_port);
+ list_for_each_entry(port, &adapter->port_list_head, list)
+ if (port != adapter->nameserver_port)
+ zfcp_erp_port_access_changed(port);
+ read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+}
+
+/*
+ * function: zfcp_erp_port_access_changed
+ *
+ * purpose:
+ */
+void
+zfcp_erp_port_access_changed(struct zfcp_port *port)
+{
+ struct zfcp_adapter *adapter = port->adapter;
+ struct zfcp_unit *unit;
+
+ debug_text_event(adapter->erp_dbf, 3, "p_access_unblock");
+ debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t));
+
+ if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED,
+ &port->status)) {
+ if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
+ list_for_each_entry(unit, &port->unit_list_head, list)
+ zfcp_erp_unit_access_changed(unit);
+ return;
+ }
+
+ ZFCP_LOG_NORMAL("reopen of port 0x%016Lx on adapter %s "
+ "(due to ACT update)\n",
+ port->wwpn, zfcp_get_busid_by_adapter(adapter));
+ if (zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED) != 0)
+ ZFCP_LOG_NORMAL("failed reopen of port"
+ "(adapter %s, wwpn=0x%016Lx)\n",
+ zfcp_get_busid_by_adapter(adapter), port->wwpn);
+}
+
+/*
+ * function: zfcp_erp_unit_access_changed
+ *
+ * purpose:
+ */
+void
+zfcp_erp_unit_access_changed(struct zfcp_unit *unit)
+{
+ struct zfcp_adapter *adapter = unit->port->adapter;
+
+ debug_text_event(adapter->erp_dbf, 3, "u_access_unblock");
+ debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t));
+
+ if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, &unit->status))
+ return;
+
+ ZFCP_LOG_NORMAL("reopen of unit 0x%016Lx on port 0x%016Lx "
+ " on adapter %s (due to ACT update)\n",
+ unit->fcp_lun, unit->port->wwpn,
+ zfcp_get_busid_by_adapter(adapter));
+ if (zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED) != 0)
+ ZFCP_LOG_NORMAL("failed reopen of unit (adapter %s, "
+ "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
+ zfcp_get_busid_by_adapter(adapter),
+ unit->port->wwpn, unit->fcp_lun);
+}
+
#undef ZFCP_LOG_AREA
git://git.onelab.eu / linux-2.6.git / blobdiff